Initial import from Adam's 20021017 CVS archive w/ modified license.

COPYING

@@ -1,33 +1,29 @@
-/*
- * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
- * All rights reserved. 
- * 
- * Redistribution and use in source and binary forms, with or without modification, 
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
- * OF SUCH DAMAGE.
- *
- * This file is part of the lwIP TCP/IP stack.
- * 
- * Author: Adam Dunkels <adam@sics.se>
- *
- */
+Copyright (c) 2001, Swedish Institute of Computer Science.
+All rights reserved. 
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions 
+are met: 
+
+1. Redistributions of source code must retain the above copyright 
+   notice, this list of conditions and the following disclaimer. 
+2. Redistributions in binary form must reproduce the above copyright 
+   notice, this list of conditions and the following disclaimer in the 
+   documentation and/or other materials provided with the distribution. 
+3. Neither the name of the Institute nor the names of its contributors 
+   may be used to endorse or promote products derived from this software 
+   without specific prior written permission. 
+
+THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+SUCH DAMAGE. 
 
 

FILES

@@ -1,4 +1,5 @@
 src/      - The source code for the lwIP TCP/IP stack.
-doc/      - The documentation for lwIP.
 
-See also the FILES file in each subdirectory.
+proj/     - Makefiles and code for compiling lwIP.
+
+See also the FILES file in each subdirectory.

README

@@ -1,89 +0,0 @@
-INTRODUCTION
-
-lwIP is a small independent implementation of the TCP/IP protocol
-suite that has been developed by Adam Dunkels at the Computer and
-Networks Architectures (CNA) lab at the Swedish Institute of Computer
-Science (SICS).
-
-The focus of the lwIP TCP/IP implementation is to reduce the RAM usage
-while still having a full scale TCP. This making lwIP suitable for use
-in embedded systems with tens of kilobytes of free RAM and room for
-around 40 kilobytes of code ROM.
-
-FEATURES
-
-  * IP (Internet Protocol) including packet forwarding over multiple network
-    interfaces
-  * ICMP (Internet Control Message Protocol) for network maintenance and debugging
-  * IGMP (Internet Group Management Protocol) for multicast traffic management
-  * UDP (User Datagram Protocol) including experimental UDP-lite extensions
-  * TCP (Transmission Control Protocol) with congestion control, RTT estimation
-    and fast recovery/fast retransmit
-  * Specialized raw/native API for enhanced performance
-  * Optional Berkeley-like socket API
-  * DNS (Domain names resolver)
-  * SNMP (Simple Network Management Protocol)
-  * DHCP (Dynamic Host Configuration Protocol)
-  * AUTOIP (for IPv4, conform with RFC 3927)
-  * PPP (Point-to-Point Protocol)
-  * ARP (Address Resolution Protocol) for Ethernet
-
-LICENSE
-
-lwIP is freely available under a BSD license.
-
-DEVELOPMENT
-
-lwIP has grown into an excellent TCP/IP stack for embedded devices,
-and developers using the stack often submit bug fixes, improvements,
-and additions to the stack to further increase its usefulness.
-
-Development of lwIP is hosted on Savannah, a central point for
-software development, maintenance and distribution. Everyone can
-help improve lwIP by use of Savannah's interface, CVS and the
-mailing list. A core team of developers will commit changes to the
-CVS source tree.
-
-The lwIP TCP/IP stack is maintained in the 'lwip' CVS module and
-contributions (such as platform ports) are in the 'contrib' module.
-
-See doc/savannah.txt for details on CVS server access for users and
-developers.
-
-Last night's CVS tar ball can be downloaded from:
-  http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING]
-
-The current CVS trees are web-browsable:
-  http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/
-  http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/contrib/
-
-Submit patches and bugs via the lwIP project page:
-  http://savannah.nongnu.org/projects/lwip/
-
-
-DOCUMENTATION
-
-The original out-dated homepage of lwIP and Adam Dunkels' papers on
-lwIP are at the official lwIP home page:
-  http://www.sics.se/~adam/lwip/
-
-Self documentation of the source code is regularly extracted from the
-current CVS sources and is available from this web page:
-  http://www.nongnu.org/lwip/
-
-There is now a constantly growin wiki about lwIP at
-  http://lwip.wikia.com/wiki/LwIP_Wiki
-
-Also, there are mailing lists you can subscribe at
-  http://savannah.nongnu.org/mail/?group=lwip
-plus searchable archives:
-  http://lists.nongnu.org/archive/html/lwip-users/
-  http://lists.nongnu.org/archive/html/lwip-devel/
-
-Reading Adam's papers, the files in docs/, browsing the source code
-documentation and browsing the mailing list archives is a good way to
-become familiar with the design of lwIP.
-
-Adam Dunkels <adam@sics.se>
-Leon Woestenberg <leon.woestenberg@gmx.net>
-

UPGRADING

@@ -1,139 +0,0 @@
-This file lists major changes between release versions that require
-ports or applications to be changed. Use it to update a port or an
-application written for an older version of lwIP to correctly work
-with newer versions.
-
-
-(CVS HEAD)
-
-  * [Enter new changes just after this line - do not remove this line]
-
-  ++ Application changes:
-
-  * Replaced struct ip_addr by typedef ip_addr_t (struct ip_addr is kept for
-    compatibility to old applications, but will be removed in the future).
-
-  * Renamed mem_realloc() to mem_trim() to prevent confusion with realloc()
-
-  +++ Raw API:
-    * Changed the semantics of tcp_close() (since it was rather a
-      shutdown before): Now the application does *NOT* get any calls to the recv
-      callback (aside from NULL/closed) after calling tcp_close()
-
-    * When calling tcp_abort() from a raw API TCP callback function,
-      make sure you return ERR_ABRT to prevent accessing unallocated memory.
-      (ERR_ABRT now means the applicaiton has called tcp_abort!)
-
-  +++ Netconn API:
-    * Changed netconn_receive() and netconn_accept() to return
-      err_t, not a pointer to new data/netconn.
-
-  +++ Socket API:
-    * LWIP_SO_RCVTIMEO: when accept() or recv() time out, they
-      now set errno to EWOULDBLOCK/EAGAIN, not ETIMEDOUT.
-
-    * Added a minimal version of posix fctl() to have a
-      standardised way to set O_NONBLOCK for nonblocking sockets.
-
-  +++ all APIs:
-    * correctly implemented SO(F)_REUSEADDR
-
-  ++ Port changes
-
-  +++ new files:
-
-    * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h:
-
-    * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains
-      the actual application programmer's API
-  
-    * Separated timer implementation from sys.h/.c, moved to timers.h/.c;
-      Added timer implementation for NO_SYS==1, set NO_SYS_NO_TIMERS==1 if you
-      still want to use your own timer implementation for NO_SYS==0 (as before).
-
-  +++ sys layer:
-
-    * Converted mbox- and semaphore-functions to take pointers to sys_mbox_t/
-      sys_sem_t;
-
-    * Converted sys_mbox_new/sys_sem_new to take pointers and return err_t;
-
-    * Added Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX to let sys.h use
-      binary semaphores instead of mutexes - as before)
-
-  +++ new options:
-
-     * Don't waste memory when chaining segments, added option TCP_OVERSIZE to
-       prevent creating many small pbufs when calling tcp_write with many small
-       blocks of data. Instead, pbufs are allocated larger than needed and the
-       space is used for later calls to tcp_write.
-
-     * Added LWIP_NETIF_TX_SINGLE_PBUF to always copy to try to create single pbufs
-       in tcp_write/udp_send.
-
-    * Added an additional option LWIP_ETHERNET to support ethernet without ARP
-      (necessary for pure PPPoE)
-
-    * Add MEMP_SEPARATE_POOLS to place memory pools in separate arrays. This may
-      be used to place these pools into user-defined memory by using external
-      declaration.
-
-    * Added TCP_SNDQUEUELOWAT corresponding to TCP_SNDLOWAT
-
-  +++ new pools:
-
-     * Netdb uses a memp pool for allocating memory when getaddrinfo() is called,
-       so MEMP_NUM_NETDB has to be set accordingly.
-
-     * DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses a memp pool instead of the heap, so
-       MEMP_NUM_LOCALHOSTLIST has to be set accordingly.
-
-     * Snmp-agent uses a memp pools instead of the heap, so MEMP_NUM_SNMP_* have
-       to be set accordingly.
-
-     * PPPoE uses a MEMP pool instead of the heap, so MEMP_NUM_PPPOE_INTERFACES
-       has to be set accordingly
-
-  * Integrated loopif into netif.c - loopif does not have to be created by the
-    port any more, just define LWIP_HAVE_LOOPIF to 1.
-
-  * Added define LWIP_RAND() for lwip-wide randomization (needs to be defined
-    in cc.h, e.g. used by igmp)
-
-  * Added printf-formatter X8_F to printf u8_t as hex
-
-  * The heap now may be moved to user-defined memory by defining
-    LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address
-
-  * added autoip_set_struct() and dhcp_set_struct() to let autoip and dhcp work
-    with user-allocated structs instead of calling mem_malloc
-
-  * Added const char* name to mem- and memp-stats for easier debugging.
-
-  * Calculate the TCP/UDP checksum while copying to only fetch data once:
-    Define LWIP_CHKSUM_COPY to a memcpy-like function that returns the checksum    
-
-  * Added SO_REUSE_RXTOALL to pass received UDP broadcast/multicast packets to
-    more than one pcb.
-
-  ++ Major bugfixes/improvements
-
-  * Implemented tcp_shutdown() to only shut down one end of a connection
-  * Implemented shutdown() at socket- and netconn-level
-  * Added errorset support to select() + improved select speed overhead
-  * Merged pppd to v2.3.11 (including some backported bugfixes from 2.4.x)
-  * Added timer implementation for NO_SYS==1 (may be disabled with NO_SYS_NO_TIMERS==1
-  * Use macros defined in ip_addr.h to work with IP addresses
-  * Implemented many nonblocking socket/netconn functions
-  * Fixed ARP input processing: only add a new entry if a request was directed as us
-  * mem_realloc() to mem_trim() to prevent confusion with realloc()
-  * Some improvements for AutoIP (don't route/forward link-local addresses, don't break
-    existing connections when assigning a routable address)
-  * Correctly handle remote side overrunning our rcv_wnd in ooseq case
-  * Removed packing from ip_addr_t, the packed version is now only used in protocol headers
-  * Corrected PBUF_POOL_BUFSIZE for ports where ETH_PAD_SIZE > 0
-  * Added support for static ARP table entries
-
-(STABLE-1.3.2)
-
-  * initial version of this file

doc/FILES

@@ -1,6 +0,0 @@
-savannah.txt   - How to obtain the current development source code.
-contrib.txt    - How to contribute to lwIP as a developer.
-rawapi.txt     - The documentation for the core API of lwIP.
-                 Also provides an overview about the other APIs and multithreading.
-snmp_agent.txt - The documentation for the lwIP SNMP agent.
-sys_arch.txt   - The documentation for a system abstraction layer of lwIP.

doc/contrib.txt

@@ -1,63 +0,0 @@
-1 Introduction
-
-This document describes some guidelines for people participating
-in lwIP development.
-
-2 How to contribute to lwIP
-
-Here is a short list of suggestions to anybody working with lwIP and 
-trying to contribute bug reports, fixes, enhancements, platform ports etc.
-First of all as you may already know lwIP is a volunteer project so feedback
-to fixes or questions might often come late. Hopefully the bug and patch tracking 
-features of Savannah help us not lose users' input.
-
-2.1 Source code style:
-
-1. do not use tabs.
-2. indentation is two spaces per level (i.e. per tab).
-3. end debug messages with a trailing newline (\n).
-4. one space between keyword and opening bracket.
-5. no space between function and opening bracket.
-6. one space and no newline before opening curly braces of a block.
-7. closing curly brace on a single line.
-8. spaces surrounding assignment and comparisons.
-9. don't initialize static and/or global variables to zero, the compiler takes care of that.
-10. use current source code style as further reference.
-
-2.2 Source code documentation style:
-
-1. JavaDoc compliant and Doxygen compatible.
-2. Function documentation above functions in .c files, not .h files.
-   (This forces you to synchronize documentation and implementation.)
-3. Use current documentation style as further reference.
- 
-2.3 Bug reports and patches:
-
-1. Make sure you are reporting bugs or send patches against the latest
-   sources. (From the latest release and/or the current CVS sources.)
-2. If you think you found a bug make sure it's not already filed in the
-   bugtracker at Savannah.
-3. If you have a fix put the patch on Savannah. If it is a patch that affects
-   both core and arch specific stuff please separate them so that the core can
-   be applied separately while leaving the other patch 'open'. The prefered way
-   is to NOT touch archs you can't test and let maintainers take care of them.
-   This is a good way to see if they are used at all - the same goes for unix
-   netifs except tapif.
-4. Do not file a bug and post a fix to it to the patch area. Either a bug report
-   or a patch will be enough.
-   If you correct an existing bug then attach the patch to the bug rather than creating a new entry in the patch area.
-5. Trivial patches (compiler warning, indentation and spelling fixes or anything obvious which takes a line or two)
-   can go to the lwip-users list. This is still the fastest way of interaction and the list is not so crowded
-   as to allow for loss of fixes. Putting bugs on Savannah and subsequently closing them is too much an overhead
-   for reporting a compiler warning fix.
-6. Patches should be specific to a single change or to related changes.Do not mix bugfixes with spelling and other
-   trivial fixes unless the bugfix is trivial too.Do not reorganize code and rename identifiers in the same patch you
-   change behaviour if not necessary.A patch is easier to read and understand if it's to the point and short than
-   if it's not to the point and long :) so the chances for it to be applied are greater. 
-
-2.4 Platform porters:
-
-1. If you have ported lwIP to a platform (an OS, a uC/processor or a combination of these) and
-   you think it could benefit others[1] you might want discuss this on the mailing list. You
-   can also ask for CVS access to submit and maintain your port in the contrib CVS module.
-   

doc/rawapi.txt

@@ -1,61 +1,22 @@
-Raw TCP/IP interface for lwIP
+Raw TCP/IP interface for lwIP 0.5
 
-Authors: Adam Dunkels, Leon Woestenberg, Christiaan Simons
+Author: Adam Dunkels
 
-lwIP provides three Application Program's Interfaces (APIs) for programs
-to use for communication with the TCP/IP code:
-* low-level "core" / "callback" or "raw" API.
-* higher-level "sequential" API.
-* BSD-style socket API.
+$Id: rawapi.txt,v 1.1.1.1 2002/10/19 12:59:32 likewise Exp $
+
+lwIP provides two Application Program's Interfaces (APIs) for programs
+to use for communication with the TCP/IP code: the sequential API
+(often just called "the API") and the raw TCP/IP interface. This
+document is intended as a description of the latter. For lwIP versions
+lower than 0.5, this API was not documented.
 
 The sequential API provides a way for ordinary, sequential, programs
 to use the lwIP stack. It is quite similar to the BSD socket API. The
-model of execution is based on the blocking open-read-write-close
+model of execution is based on the open-read-write-close
 paradigm. Since the TCP/IP stack is event based by nature, the TCP/IP
 code and the application program must reside in different execution
 contexts (threads).
 
-The socket API is a compatibility API for existing applications,
-currently it is built on top of the sequential API. It is meant to
-provide all functions needed to run socket API applications running
-on other platforms (e.g. unix / windows etc.). However, due to limitations
-in the specification of this API, there might be incompatibilities
-that require small modifications of existing programs.
-
-** Threading
-
-lwIP started targeting single-threaded environments. When adding multi-
-threading support, instead of making the core thread-safe, another
-approach was chosen: there is one main thread running the lwIP core
-(also known as the "tcpip_thread"). The raw API may only be used from
-this thread! Application threads using the sequential- or socket API
-communicate with this main thread through message passing.
-
-      As such, the list of functions that may be called from
-      other threads or an ISR is very limited! Only functions
-      from these API header files are thread-safe:
-      - api.h
-      - netbuf.h
-      - netdb.h
-      - netifapi.h
-      - sockets.h
-      - sys.h
-
-      Additionaly, memory (de-)allocation functions may be
-      called from multiple threads (not ISR!) with NO_SYS=0
-      since they are protected by SYS_LIGHTWEIGHT_PROT and/or
-      semaphores.
-
-      Only since 1.3.0, if SYS_LIGHTWEIGHT_PROT is set to 1
-      and LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT is set to 1,
-      pbuf_free() may also be called from another thread or
-      an ISR (since only then, mem_free - for PBUF_RAM - may
-      be called from an ISR: otherwise, the HEAP is only
-      protected by semaphores).
-      
-
-** The remainder of this document discusses the "raw" API. **
-
 The raw TCP/IP interface allows the application program to integrate
 better with the TCP/IP code. Program execution is event based by
 having callback functions being called from within the TCP/IP
@@ -75,6 +36,7 @@ Both APIs can be used simultaneously by different application
 programs. In fact, the sequential API is implemented as an application
 program using the raw TCP/IP interface.
 
+
 --- Callbacks
 
 Program execution is driven by callbacks. Each callback is an ordinary
@@ -135,19 +97,6 @@ incoming connections or be explicitly connected to another host.
   listening connection. If so, the memory associated with the pcb
   passed as an argument to tcp_listen() will not be deallocated.
 
-- struct tcp_pcb *tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog)
-
-  Same as tcp_listen, but limits the number of outstanding connections
-  in the listen queue to the value specified by the backlog argument.
-  To use it, your need to set TCP_LISTEN_BACKLOG=1 in your lwipopts.h.
-
-- void tcp_accepted(struct tcp_pcb *pcb)
-
-  Inform lwIP that an incoming connection has been accepted. This would
-  usually be called from the accept callback. This allows lwIP to perform
-  housekeeping tasks, such as allowing further incoming connections to be
-  queued in the listen backlog.
-
 - void tcp_accept(struct tcp_pcb *pcb,
                   err_t (* accept)(void *arg, struct tcp_pcb *newpcb,
                                    err_t err))
@@ -168,9 +117,8 @@ incoming connections or be explicitly connected to another host.
   function specified as the fourth argument (the "connected" argument)
   when the connection is established. If the connection could not be
   properly established, either because the other host refused the
-  connection or because the other host didn't answer, the "err"
-  callback function of this pcb (registered with tcp_err, see below)
-  will be called.
+  connection or because the other host didn't answer, the "connected"
+  function will be called with an the "err" argument set accordingly.
 
   The tcp_connect() function can return ERR_MEM if no memory is
   available for enqueueing the SYN segment. If the SYN indeed was
@@ -207,7 +155,7 @@ callback function.
 
 - void tcp_sent(struct tcp_pcb *pcb,
                 err_t (* sent)(void *arg, struct tcp_pcb *tpcb,
-                u16_t len))
+		               u16_t len))
 
   Specifies the callback function that should be called when data has
   successfully been received (i.e., acknowledged) by the remote
@@ -229,10 +177,7 @@ window.
 
   Sets the callback function that will be called when new data
   arrives. The callback function will be passed a NULL pbuf to
-  indicate that the remote host has closed the connection. If
-  there are no errors and the callback function is to return
-  ERR_OK, then it must free the pbuf. Otherwise, it must not
-  free the pbuf so that lwIP core code can store it.
+  indicate that the remote host has closed the connection.
 
 - void tcp_recved(struct tcp_pcb *pcb, u16_t len)
 
@@ -278,18 +223,13 @@ again when the connection has been idle for a while.
   Aborts the connection by sending a RST (reset) segment to the remote
   host. The pcb is deallocated. This function never fails.
 
-  ATTENTION: When calling this from one of the TCP callbacks, make
-  sure you always return ERR_ABRT (and never return ERR_ABRT otherwise
-  or you will risk accessing deallocated memory or memory leaks!
-
-
 If a connection is aborted because of an error, the application is
 alerted of this event by the err callback. Errors that might abort a
 connection are when there is a shortage of memory. The callback
 function to be called is set using the tcp_err() function.
 
 - void tcp_err(struct tcp_pcb *pcb, void (* err)(void *arg,
-       err_t err))
+	       err_t err))
 
   The error callback function does not get the pcb passed to it as a
   parameter since the pcb may already have been deallocated.
@@ -334,11 +274,6 @@ level of complexity of UDP, the interface is significantly simpler.
   Sets the remote end of the pcb. This function does not generate any
   network traffic, but only set the remote address of the pcb.
 
-- err_t udp_disconnect(struct udp_pcb *pcb)
-
-  Remove the remote end of the pcb. This function does not generate
-  any network traffic, but only removes the remote address of the pcb.
-
 - err_t udp_send(struct udp_pcb *pcb, struct pbuf *p)
 
   Sends the pbuf p. The pbuf is not deallocated.
@@ -351,154 +286,4 @@ level of complexity of UDP, the interface is significantly simpler.
                               void *recv_arg)
 
   Specifies a callback function that should be called when a UDP
-  datagram is received.
-  
-
---- System initalization
-
-A truly complete and generic sequence for initializing the lwip stack
-cannot be given because it depends on the build configuration (lwipopts.h)
-and additional initializations for your runtime environment (e.g. timers).
-
-We can give you some idea on how to proceed when using the raw API.
-We assume a configuration using a single Ethernet netif and the
-UDP and TCP transport layers, IPv4 and the DHCP client.
-
-Call these functions in the order of appearance:
-
-- stats_init()
-
-  Clears the structure where runtime statistics are gathered.
-
-- sys_init()
-  
-  Not of much use since we set the NO_SYS 1 option in lwipopts.h,
-  to be called for easy configuration changes.
-
-- mem_init()
-
-  Initializes the dynamic memory heap defined by MEM_SIZE.
-
-- memp_init()
-
-  Initializes the memory pools defined by MEMP_NUM_x.
-
-- pbuf_init()
-
-  Initializes the pbuf memory pool defined by PBUF_POOL_SIZE.
-  
-- etharp_init()
-
-  Initializes the ARP table and queue.
-  Note: you must call etharp_tmr at a ARP_TMR_INTERVAL (5 seconds) regular interval
-  after this initialization.
-
-- ip_init()
-
-  Doesn't do much, it should be called to handle future changes.
-
-- udp_init()
-
-  Clears the UDP PCB list.
-
-- tcp_init()
-
-  Clears the TCP PCB list and clears some internal TCP timers.
-  Note: you must call tcp_fasttmr() and tcp_slowtmr() at the
-  predefined regular intervals after this initialization. 
-  
-- netif_add(struct netif *netif, struct ip_addr *ipaddr,
-            struct ip_addr *netmask, struct ip_addr *gw,
-            void *state, err_t (* init)(struct netif *netif),
-            err_t (* input)(struct pbuf *p, struct netif *netif))
-
-  Adds your network interface to the netif_list. Allocate a struct
-  netif and pass a pointer to this structure as the first argument.
-  Give pointers to cleared ip_addr structures when using DHCP,
-  or fill them with sane numbers otherwise. The state pointer may be NULL.
-
-  The init function pointer must point to a initialization function for
-  your ethernet netif interface. The following code illustrates it's use.
-  
-  err_t netif_if_init(struct netif *netif)
-  {
-    u8_t i;
-    
-    for(i = 0; i < ETHARP_HWADDR_LEN; i++) netif->hwaddr[i] = some_eth_addr[i];
-    init_my_eth_device();
-    return ERR_OK;
-  }
-  
-  For ethernet drivers, the input function pointer must point to the lwip
-  function ethernet_input() declared in "netif/etharp.h". Other drivers
-  must use ip_input() declared in "lwip/ip.h".
-  
-- netif_set_default(struct netif *netif)
-
-  Registers the default network interface.
-
-- netif_set_up(struct netif *netif)
-
-  When the netif is fully configured this function must be called.
-
-- dhcp_start(struct netif *netif)
-
-  Creates a new DHCP client for this interface on the first call.
-  Note: you must call dhcp_fine_tmr() and dhcp_coarse_tmr() at
-  the predefined regular intervals after starting the client.
-  
-  You can peek in the netif->dhcp struct for the actual DHCP status.
-
-
---- Optimalization hints
-
-The first thing you want to optimize is the lwip_standard_checksum()
-routine from src/core/inet.c. You can override this standard
-function with the #define LWIP_CHKSUM <your_checksum_routine>.
-
-There are C examples given in inet.c or you might want to
-craft an assembly function for this. RFC1071 is a good
-introduction to this subject.
-
-Other significant improvements can be made by supplying
-assembly or inline replacements for htons() and htonl()
-if you're using a little-endian architecture.
-#define LWIP_PLATFORM_BYTESWAP 1
-#define LWIP_PLATFORM_HTONS(x) <your_htons>
-#define LWIP_PLATFORM_HTONL(x) <your_htonl>
-
-Check your network interface driver if it reads at
-a higher speed than the maximum wire-speed. If the
-hardware isn't serviced frequently and fast enough
-buffer overflows are likely to occur.
-
-E.g. when using the cs8900 driver, call cs8900if_service(ethif)
-as frequently as possible. When using an RTOS let the cs8900 interrupt
-wake a high priority task that services your driver using a binary
-semaphore or event flag. Some drivers might allow additional tuning
-to match your application and network.
-
-For a production release it is recommended to set LWIP_STATS to 0.
-Note that speed performance isn't influenced much by simply setting
-high values to the memory options.
-
-For more optimization hints take a look at the lwIP wiki.
-
---- Zero-copy MACs
-
-To achieve zero-copy on transmit, the data passed to the raw API must
-remain unchanged until sent. Because the send- (or write-)functions return
-when the packets have been enqueued for sending, data must be kept stable
-after that, too.
-
-This implies that PBUF_RAM/PBUF_POOL pbufs passed to raw-API send functions
-must *not* be reused by the application unless their ref-count is 1.
-
-For no-copy pbufs (PBUF_ROM/PBUF_REF), data must be kept unchanged, too,
-but the stack/driver will/must copy PBUF_REF'ed data when enqueueing, while
-PBUF_ROM-pbufs are just enqueued (as ROM-data is expected to never change).
-
-Also, data passed to tcp_write without the copy-flag must not be changed!
-
-Therefore, be careful which type of PBUF you use and if you copy TCP data
-or not!
+  datagram is received.

doc/savannah.txt

@@ -1,135 +0,0 @@
-Daily Use Guide for using Savannah for lwIP
-
-Table of Contents:
-
-1 - Obtaining lwIP from the CVS repository
-2 - Committers/developers CVS access using SSH (to be written)
-3 - Merging from DEVEL branch to main trunk (stable branch)
-4 - How to release lwIP
-
-
-
-1 Obtaining lwIP from the CVS repository
-----------------------------------------
-
-To perform an anonymous CVS checkout of the main trunk (this is where
-bug fixes and incremental enhancements occur), do this:
-
-cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout lwip
- 
-Or, obtain a stable branch (updated with bug fixes only) as follows:
-cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
-  -r STABLE-0_7 -d lwip-0.7 lwip
-
-Or, obtain a specific (fixed) release as follows:
-cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
-  -r STABLE-0_7_0 -d lwip-0.7.0 lwip
-
-3 Committers/developers CVS access using SSH
---------------------------------------------
-
-The Savannah server uses SSH (Secure Shell) protocol 2 authentication and encryption.
-As such, CVS commits to the server occur through a SSH tunnel for project members.
-To create a SSH2 key pair in UNIX-like environments, do this:
-
-ssh-keygen -t dsa
-
-Under Windows, a recommended SSH client is "PuTTY", freely available with good
-documentation and a graphic user interface. Use its key generator.
-
-Now paste the id_dsa.pub contents into your Savannah account public key list. Wait
-a while so that Savannah can update its configuration (This can take minutes).
-
-Try to login using SSH:
-
-ssh -v your_login@cvs.sv.gnu.org
-
-If it tells you:
-
-Authenticating with public key "your_key_name"...
-Server refused to allocate pty
-
-then you could login; Savannah refuses to give you a shell - which is OK, as we
-are allowed to use SSH for CVS only. Now, you should be able to do this:
-
-export CVS_RSH=ssh
-cvs -z3 -d:ext:your_login@cvs.sv.gnu.org:/sources/lwip co lwip
- 
-after which you can edit your local files with bug fixes or new features and
-commit them. Make sure you know what you are doing when using CVS to make
-changes on the repository. If in doubt, ask on the lwip-members mailing list.
-
-(If SSH asks about authenticity of the host, you can check the key
- fingerprint against http://savannah.nongnu.org/cvs/?group=lwip)
-
-
-3 Merging from DEVEL branch to main trunk (stable)
---------------------------------------------------
-
-Merging is a delicate process in CVS and requires the
-following disciplined steps in order to prevent conflicts
-in the future. Conflicts can be hard to solve!
-
-Merging from branch A to branch B requires that the A branch
-has a tag indicating the previous merger. This tag is called
-'merged_from_A_to_B'. After merging, the tag is moved in the
-A branch to remember this merger for future merge actions.
-
-IMPORTANT: AFTER COMMITTING A SUCCESFUL MERGE IN THE
-REPOSITORY, THE TAG MUST BE SET ON THE SOURCE BRANCH OF THE
-MERGE ACTION (REPLACING EXISTING TAGS WITH THE SAME NAME).
-
-Merge all changes in DEVEL since our last merge to main:
-
-In the working copy of the main trunk:
-cvs update -P -jmerged_from_DEVEL_to_main -jDEVEL 
-
-(This will apply the changes between 'merged_from_DEVEL_to_main'
-and 'DEVEL' to your work set of files)
-
-We can now commit the merge result.
-cvs commit -R -m "Merged from DEVEL to main." 
-
-If this worked out OK, we now move the tag in the DEVEL branch
-to this merge point, so we can use this point for future merges:
-
-cvs rtag -F -r DEVEL merged_from_DEVEL_to_main lwip 
-
-4 How to release lwIP
----------------------
-
-First, checkout a clean copy of the branch to be released. Tag this set with
-tag name "STABLE-0_6_3". (I use release number 0.6.3 throughout this example).
-
-Login CVS using pserver authentication, then export a clean copy of the
-tagged tree. Export is similar to a checkout, except that the CVS metadata
-is not created locally. 
-
-export CVS_RSH=ssh
-cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
-  -r STABLE-0_6_3 -d lwip-0.6.3 lwip
-
-Archive this directory using tar, gzip'd, bzip2'd and zip'd.
-
-tar czvf lwip-0.6.3.tar.gz lwip-0.6.3
-tar cjvf lwip-0.6.3.tar.bz2 lwip-0.6.3
-zip -r lwip-0.6.3.zip lwip-0.6.3
-
-Now, sign the archives with a detached GPG binary signature as follows:
-
-gpg -b lwip-0.6.3.tar.gz
-gpg -b lwip-0.6.3.tar.bz2
-gpg -b lwip-0.6.3.zip
-
-Upload these files using anonymous FTP:
-ncftp ftp://savannah.gnu.org/incoming/savannah/lwip
-
-ncftp>mput *0.6.3.*
-
-Additionally, you may post a news item on Savannah, like this:
-
-A new 0.6.3 release is now available here:
-http://savannah.nongnu.org/files/?group=lwip&highlight=0.6.3
-
-You will have to submit this via the user News interface, then approve
-this via the Administrator News interface.

doc/snmp_agent.txt

@@ -1,181 +0,0 @@
-SNMPv1 agent for lwIP
-
-Author: Christiaan Simons
-
-This is a brief introduction how to use and configure the SNMP agent.
-Note the agent uses the raw-API UDP interface so you may also want to
-read rawapi.txt to gain a better understanding of the SNMP message handling.
-
-0 Agent Capabilities
-====================
-
-SNMPv1 per RFC1157
-  This is an old(er) standard but is still widely supported.
-  For SNMPv2c and v3 have a greater complexity and need many
-  more lines of code. IMHO this breaks the idea of "lightweight IP".
-
-  Note the S in SNMP stands for "Simple". Note that "Simple" is
-  relative. SNMP is simple compared to the complex ISO network
-  management protocols CMIP (Common Management Information Protocol)
-  and CMOT (CMip Over Tcp).
-
-MIB II per RFC1213
-  The standard lwIP stack management information base.
-  This is a required MIB, so this is always enabled.
-  When builing lwIP without TCP, the mib-2.tcp group is omitted.
-  The groups EGP, CMOT and transmission are disabled by default.
-  
-  Most mib-2 objects are not writable except:
-  sysName, sysLocation, sysContact, snmpEnableAuthenTraps.
-  Writing to or changing the ARP and IP address and route
-  tables is not possible.
- 
-  Note lwIP has a very limited notion of IP routing. It currently
-  doen't have a route table and doesn't have a notion of the U,G,H flags.
-  Instead lwIP uses the interface list with only one default interface
-  acting as a single gateway interface (G) for the default route.
-
-  The agent returns a "virtual table" with the default route 0.0.0.0
-  for the default interface and network routes (no H) for each
-  network interface in the netif_list.
-  All routes are considered to be up (U).
-
-Loading additional MIBs
-  MIBs can only be added in compile-time, not in run-time.
-  There is no MIB compiler thus additional MIBs must be hand coded.
-
-Large SNMP message support
-  The packet decoding and encoding routines are designed
-  to use pbuf-chains. Larger payloads than the minimum
-  SNMP requirement of 484 octets are supported if the 
-  PBUF_POOL_SIZE and IP_REASS_BUFSIZE are set to match your
-  local requirement.
-
-1 Building the Agent
-====================
-
-First of all you'll need to add the following define
-to your local lwipopts.h:
-
-#define LWIP_SNMP               1
-
-and add the source files in lwip/src/core/snmp
-and some snmp headers in lwip/src/include/lwip to your makefile.
-
-Note you'll might need to adapt you network driver to update
-the mib2 variables for your interface.
-
-2 Running the Agent
-===================
-
-The following function calls must be made in your program to
-actually get the SNMP agent running.
-
-Before starting the agent you should supply pointers
-to non-volatile memory for sysContact, sysLocation,
-and snmpEnableAuthenTraps. You can do this by calling
-
-snmp_set_syscontact()
-snmp_set_syslocation()
-snmp_set_snmpenableauthentraps()
-
-Additionally you may want to set
-
-snmp_set_sysdescr()
-snmp_set_sysobjid() (if you have a private MIB)
-snmp_set_sysname()
-
-Also before starting the agent you need to setup
-one or more trap destinations using these calls:
-
-snmp_trap_dst_enable();
-snmp_trap_dst_ip_set();
-
-In the lwIP initialisation sequence call snmp_init() just after
-the call to udp_init().
-
-Exactly every 10 msec the SNMP uptime timestamp must be updated with
-snmp_inc_sysuptime(). You should call this from a timer interrupt
-or a timer signal handler depending on your runtime environment.
-
-An alternative way to update the SNMP uptime timestamp is to do a call like
-snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but call to
-a lower frequency). Another one is to not call snmp_inc_sysuptime() or
-snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
-This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
-snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
-when it's queried (any function which need "sysuptime" have to call
-snmp_get_sysuptime).
-
-
-3 Private MIBs
-==============
-
-If want to extend the agent with your own private MIB you'll need to
-add the following define to your local lwipopts.h:
-
-#define SNMP_PRIVATE_MIB        1
-
-You must provide the private_mib.h and associated files yourself.
-Note we don't have a "MIB compiler" that generates C source from a MIB,
-so you're required to do some serious coding if you enable this!
-
-Note the lwIP enterprise ID (26381) is assigned to the lwIP project,
-ALL OBJECT IDENTIFIERS LIVING UNDER THIS ID ARE ASSIGNED BY THE lwIP
-MAINTAINERS!
-
-If you need to create your own private MIB you'll need
-to apply for your own enterprise ID with IANA: http://www.iana.org/numbers.html 
-
-You can set it by passing a struct snmp_obj_id to the agent
-using snmp_set_sysobjid(&my_object_id), just before snmp_init().
-
-Note the object identifiers for thes MIB-2 and your private MIB
-tree must be kept in sorted ascending (lexicographical) order.
-This to ensure correct getnext operation.
-
-An example for a private MIB is part of the "minimal Unix" project:
-contrib/ports/unix/proj/minimal/lwip_prvmib.c
-
-The next chapter gives a more detailed description of the
-MIB-2 tree and the optional private MIB.
-
-4 The Gory Details
-==================
-
-4.0 Object identifiers and the MIB tree.
-
-We have three distinct parts for all object identifiers:
-
-The prefix
-  .iso.org.dod.internet
-
-the middle part 
-  .mgmt.mib-2.ip.ipNetToMediaTable.ipNetToMediaEntry.ipNetToMediaPhysAddress
-
-and the index part
-  .1.192.168.0.1
-
-Objects located above the .internet hierarchy aren't supported.
-Currently only the .mgmt sub-tree is available and
-when the SNMP_PRIVATE_MIB is enabled the .private tree
-becomes available too.
-
-Object identifiers from incoming requests are checked
-for a matching prefix, middle part and index part
-or are expanded(*) for GetNext requests with short
-or inexisting names in the request.
-(* we call this "expansion" but this also
-resembles the "auto-completion" operation)
-
-The middle part is usually located in ROM (const)
-to preserve precious RAM on small microcontrollers.
-However RAM location is possible for a dynamically
-changing private tree.
-
-The index part is handled by functions which in
-turn use dynamically allocated index trees from RAM.
-These trees are updated by e.g. the etharp code
-when new entries are made or removed form the ARP cache.
-
-/** @todo more gory details */

doc/sys_arch.txt

@@ -1,7 +1,9 @@
-sys_arch interface for lwIP 0.6++
+sys_arch interface for lwIP 0.5
 
 Author: Adam Dunkels
 
+$Id: sys_arch.txt,v 1.1.1.1 2002/10/19 12:59:33 likewise Exp $
+
 The operating system emulation layer provides a common interface
 between the lwIP code and the underlying operating system kernel. The
 general idea is that porting lwIP to new architectures requires only
@@ -16,11 +18,6 @@ functionality. Previous versions of lwIP required the sys_arch to
 implement timer scheduling as well but as of lwIP 0.5 this is
 implemented in a higher layer.
 
-In addition to the source file providing the functionality of sys_arch,
-the OS emulation layer must provide several header files defining
-macros used throughout lwip.  The files required and the macros they
-must define are listed below the sys_arch description.
-
 Semaphores can be either counting or binary - lwIP works with both
 kinds. Mailboxes are used for message passing and can be implemented
 either as a queue which allows multiple messages to be posted to a
@@ -47,35 +44,35 @@ The following functions must be implemented by the sys_arch:
 
 - void sys_sem_free(sys_sem_t sem)
 
-  Deallocates a semaphore.
+  Deallocates a semaphore. 
 
 - void sys_sem_signal(sys_sem_t sem)
 
   Signals a semaphore.
 
-- u32_t sys_arch_sem_wait(sys_sem_t sem, u32_t timeout)
+- u16_t sys_arch_sem_wait(sys_sem_t sem, u16_t timeout)
 
   Blocks the thread while waiting for the semaphore to be
   signaled. If the "timeout" argument is non-zero, the thread should
   only be blocked for the specified time (measured in
-  milliseconds). If the "timeout" argument is zero, the thread should be
-  blocked until the semaphore is signalled.
+  milliseconds).
 
-  If the timeout argument is non-zero, the return value is the number of
-  milliseconds spent waiting for the semaphore to be signaled. If the
-  semaphore wasn't signaled within the specified time, the return value is
-  SYS_ARCH_TIMEOUT. If the thread didn't have to wait for the semaphore
-  (i.e., it was already signaled), the function may return zero.
+  If the timeout argument is non-zero, the return value is the amount
+  of time spent waiting for the semaphore to be signaled. If the
+  semaphore wasn't signaled within the specified time, the return
+  value is zero. If the thread didn't have to wait for the semaphore
+  (i.e., it was already signaled), care must be taken to ensure that
+  the function does not return a zero value since this is used to
+  indicate that a timeout occured. A suitable way to implement this is
+  to check if the time spent waiting is zero and if so, the value 1 is
+  returned.
 
   Notice that lwIP implements a function with a similar name,
   sys_sem_wait(), that uses the sys_arch_sem_wait() function.
 
-- sys_mbox_t sys_mbox_new(int size)
+- sys_mbox_t sys_mbox_new(void)
 
-  Creates an empty mailbox for maximum "size" elements. Elements stored
-  in mailboxes are pointers. You have to define macros "_MBOX_SIZE"
-  in your lwipopts.h, or ignore this parameter in your implementation
-  and use a default size.
+  Creates an empty mailbox.
 
 - void sys_mbox_free(sys_mbox_t mbox)
 
@@ -85,43 +82,24 @@ The following functions must be implemented by the sys_arch:
 
 - void sys_mbox_post(sys_mbox_t mbox, void *msg)
 
-  Posts the "msg" to the mailbox. This function have to block until
-  the "msg" is really posted.
+  Posts the "msg" to the mailbox.
 
-- err_t sys_mbox_trypost(sys_mbox_t mbox, void *msg)
-
-  Try to post the "msg" to the mailbox. Returns ERR_MEM if this one
-  is full, else, ERR_OK if the "msg" is posted.
-
-- u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u32_t timeout)
+- u16_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u16_t timeout)
 
   Blocks the thread until a message arrives in the mailbox, but does
   not block the thread longer than "timeout" milliseconds (similar to
-  the sys_arch_sem_wait() function). If "timeout" is 0, the thread should
-  be blocked until a message arrives. The "msg" argument is a result
+  the sys_arch_sem_wait() function). The "msg" argument is a result
   parameter that is set by the function (i.e., by doing "*msg =
   ptr"). The "msg" parameter maybe NULL to indicate that the message
   should be dropped.
 
-  The return values are the same as for the sys_arch_sem_wait() function:
-  Number of milliseconds spent waiting or SYS_ARCH_TIMEOUT if there was a
-  timeout.
+  The return values are the same as for the sys_arch_sem_wait()
+  function and the function must not return zero even if a message was
+  present in the mailbox and the time spent waiting was zero
+  milliseconds. 
 
   Note that a function with a similar name, sys_mbox_fetch(), is
   implemented by lwIP. 
-
-- u32_t sys_arch_mbox_tryfetch(sys_mbox_t mbox, void **msg)
-
-  This is similar to sys_arch_mbox_fetch, however if a message is not
-  present in the mailbox, it immediately returns with the code
-  SYS_MBOX_EMPTY. On success 0 is returned.
-
-  To allow for efficient implementations, this can be defined as a
-  function-like macro in sys_arch.h instead of a normal function. For
-  example, a naive implementation could be:
-    #define sys_arch_mbox_tryfetch(mbox,msg) \
-      sys_arch_mbox_fetch(mbox,msg,1)
-  although this would introduce unnecessary delays.
   
 - struct sys_timeouts *sys_arch_timeouts(void)
 
@@ -131,7 +109,7 @@ The following functions must be implemented by the sys_arch:
   pointer to a linked list of timeouts. This function is called by
   the lwIP timeout scheduler and must not return a NULL value. 
 
-  In a single thread sys_arch implementation, this function will
+  In a single threadd sys_arch implementation, this function will
   simply return a pointer to a global sys_timeouts variable stored in
   the sys_arch module.
   
@@ -139,90 +117,9 @@ If threads are supported by the underlying operating system and if
 such functionality is needed in lwIP, the following function will have
 to be implemented as well:
 
-- sys_thread_t sys_thread_new(char *name, void (* thread)(void *arg), void *arg, int stacksize, int prio)
+- void sys_thread_new(void (* thread)(void *arg), void *arg)
 
-  Starts a new thread named "name" with priority "prio" that will begin its
-  execution in the function "thread()". The "arg" argument will be passed as an
-  argument to the thread() function. The stack size to used for this thread is
-  the "stacksize" parameter. The id of the new thread is returned. Both the id
-  and the priority are system dependent.
+  Starts a new thread that will begin its execution in the function
+  "thread()". The "arg" argument will be passed as an argument to the
+  thread() function.
 
-- sys_prot_t sys_arch_protect(void)
-
-  This optional function does a "fast" critical region protection and returns
-  the previous protection level. This function is only called during very short
-  critical regions. An embedded system which supports ISR-based drivers might
-  want to implement this function by disabling interrupts. Task-based systems
-  might want to implement this by using a mutex or disabling tasking. This
-  function should support recursive calls from the same task or interrupt. In
-  other words, sys_arch_protect() could be called while already protected. In
-  that case the return value indicates that it is already protected.
-
-  sys_arch_protect() is only required if your port is supporting an operating
-  system.
-
-- void sys_arch_unprotect(sys_prot_t pval)
-
-  This optional function does a "fast" set of critical region protection to the
-  value specified by pval. See the documentation for sys_arch_protect() for
-  more information. This function is only required if your port is supporting
-  an operating system.
-
-Note:
-
-Be carefull with using mem_malloc() in sys_arch. When malloc() refers to
-mem_malloc() you can run into a circular function call problem. In mem.c
-mem_init() tries to allcate a semaphore using mem_malloc, which of course
-can't be performed when sys_arch uses mem_malloc.
-
--------------------------------------------------------------------------------
-Additional files required for the "OS support" emulation layer:
--------------------------------------------------------------------------------
-
-cc.h       - Architecture environment, some compiler specific, some
-             environment specific (probably should move env stuff 
-             to sys_arch.h.)
-
-  Typedefs for the types used by lwip -
-    u8_t, s8_t, u16_t, s16_t, u32_t, s32_t, mem_ptr_t
-
-  Compiler hints for packing lwip's structures -
-    PACK_STRUCT_FIELD(x)
-    PACK_STRUCT_STRUCT
-    PACK_STRUCT_BEGIN
-    PACK_STRUCT_END
-
-  Platform specific diagnostic output -
-    LWIP_PLATFORM_DIAG(x)    - non-fatal, print a message.
-    LWIP_PLATFORM_ASSERT(x)  - fatal, print message and abandon execution.
-    Portability defines for printf formatters:
-    U16_F, S16_F, X16_F, U32_F, S32_F, X32_F, SZT_F
-
-  "lightweight" synchronization mechanisms -
-    SYS_ARCH_DECL_PROTECT(x) - declare a protection state variable.
-    SYS_ARCH_PROTECT(x)      - enter protection mode.
-    SYS_ARCH_UNPROTECT(x)    - leave protection mode.
-
-  If the compiler does not provide memset() this file must include a
-  definition of it, or include a file which defines it.
-
-  This file must either include a system-local <errno.h> which defines
-  the standard *nix error codes, or it should #define LWIP_PROVIDE_ERRNO
-  to make lwip/arch.h define the codes which are used throughout.
-
-
-perf.h     - Architecture specific performance measurement.
-  Measurement calls made throughout lwip, these can be defined to nothing.
-    PERF_START               - start measuring something.
-    PERF_STOP(x)             - stop measuring something, and record the result.
-
-sys_arch.h - Tied to sys_arch.c
-
-  Arch dependent types for the following objects:
-    sys_sem_t, sys_mbox_t, sys_thread_t,
-  And, optionally:
-    sys_prot_t
-
-  Defines to set vars of sys_mbox_t and sys_sem_t to NULL.
-    SYS_MBOX_NULL NULL
-    SYS_SEM_NULL NULL

proj/minimal/Makefile

@@ -0,0 +1,94 @@
+# Copyright (c) 2001, Swedish Institute of Computer Science.
+# All rights reserved. 
+#
+# Redistribution and use in source and binary forms, with or without 
+# modification, are permitted provided that the following conditions 
+# are met: 
+#
+# 1. Redistributions of source code must retain the above copyright 
+#    notice, this list of conditions and the following disclaimer. 
+# 2. Redistributions in binary form must reproduce the above copyright 
+#    notice, this list of conditions and the following disclaimer in the 
+#    documentation and/or other materials provided with the distribution. 
+# 3. Neither the name of the Institute nor the names of its contributors 
+#    may be used to endorse or promote products derived from this software 
+#    without specific prior written permission. 
+#
+# THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+# SUCH DAMAGE. 
+#
+# This file is part of the lwIP TCP/IP stack.
+# 
+# Author: Adam Dunkels <adam@sics.se>
+#
+# $Id: Makefile,v 1.1.1.1 2002/10/19 12:59:33 likewise Exp $
+
+CCDEP=gcc
+CC=gcc
+CFLAGS=-g -Wall -DIPv4 -Os -fpack-struct
+LWIPARCH=unix
+ARFLAGS=rs
+LWIPDIR=../../src
+
+CFLAGS:=$(CFLAGS) \
+	-I$(LWIPDIR)/include -I$(LWIPDIR)/arch/$(LWIPARCH)/include -I$(LWIPDIR)/include/ipv4 \
+	-Iapps -I.
+
+# COREFILES, CORE4FILES: The minimum set of files needed for lwIP.
+COREFILES=$(LWIPDIR)/core/mem.c $(LWIPDIR)/core/memp.c $(LWIPDIR)/core/netif.c \
+	$(LWIPDIR)/core/pbuf.c $(LWIPDIR)/core/stats.c $(LWIPDIR)/core/sys.c \
+        $(LWIPDIR)/core/tcp.c $(LWIPDIR)/core/tcp_input.c \
+        $(LWIPDIR)/core/tcp_output.c $(LWIPDIR)/core/udp.c 
+CORE4FILES=$(LWIPDIR)/core/ipv4/icmp.c $(LWIPDIR)/core/ipv4/ip.c \
+	$(LWIPDIR)/core/inet.c $(LWIPDIR)/core/ipv4/ip_addr.c
+
+# NETIFFILES: Files implementing various generic network interface functions.'
+NETIFFILES=$(LWIPDIR)/netif/etharp.c mintapif.c
+
+# LWIPFILES: All the above.
+LWIPFILES=$(COREFILES) $(CORE4FILES) $(NETIFFILES)
+LWIPFILESW=$(wildcard $(LWIPFILES))
+LWIPOBJS=$(notdir $(LWIPFILESW:.c=.o))
+
+# APPFILES
+APPFILES=echo.c 
+
+LWIPLIB=liblwip4.a
+APPLIB=liblwipapps.a
+APPOBJS=$(notdir $(APPFILES:.c=.o))
+
+%.o:
+	$(CC) $(CFLAGS) -c $(<:.o=.c)
+
+all ipv4 compile: minimal
+.PHONY: all
+
+clean:
+	rm -f *.o $(LWIPLIB) $(APPLIB) minimal .depend* *.core core
+
+depend dep: .depend
+
+include .depend
+
+$(APPLIB): $(APPOBJS)
+	$(AR) $(ARFLAGS) $(APPLIB) $?
+
+$(LWIPLIB): $(LWIPOBJS)
+	$(AR) $(ARFLAGS) $(LWIPLIB) $?
+
+.depend: main.c $(LWIPFILES) $(APPFILES)
+	$(CCDEP) $(CFLAGS) -MM $^ > .depend || rm -f .depend
+
+minimal: .depend $(LWIPLIB) $(APPLIB) main.o $(APPFILES)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o minimal main.o $(APPLIB) $(LWIPLIB)
+
+

proj/minimal/README

@@ -0,0 +1,3 @@
+This is an example of a very minimal lwIP project. It runs in a single
+thread and runs a single example application - an echo server. The
+echo application is implemented using the raw API.

proj/minimal/echo.c

@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+#include "lwip/stats.h"
+#include "lwip/tcp.h"
+
+struct echo_state {
+  struct pbuf *p;
+  u8_t failed;
+#define FAILED_MAX 8
+};
+/*-----------------------------------------------------------------------------------*/
+static void
+echo_err(void *arg, err_t err)
+{
+  struct echo_state *es = arg;
+
+  if(arg != NULL) {
+    pbuf_free(es->p);
+    mem_free(arg);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+close_conn(struct tcp_pcb *pcb, struct echo_state *es)
+{
+  tcp_arg(pcb, NULL);
+#if 0
+  tcp_sent(pcb, NULL);  
+  tcp_recv(pcb, NULL);
+#endif /* 0 */
+  if(es != NULL) {
+    pbuf_free(es->p);
+    mem_free(es);
+  }
+  tcp_close(pcb);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+send_buf(struct tcp_pcb *pcb, struct echo_state *es)
+{
+  struct pbuf *q;
+  
+  do {
+    q = es->p;
+    es->p = pbuf_dechain(q);
+    if(tcp_write(pcb, q->payload, q->len, 1) == ERR_MEM) {
+      pbuf_chain(q, es->p);
+      es->p = q;
+      return;
+    }
+    tcp_recved(pcb, q->len);
+    pbuf_free(q);
+  } while(es->p != NULL);   
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+echo_poll(void *arg, struct tcp_pcb *pcb)
+{
+  struct echo_state *es;
+
+  if(arg == NULL) {
+    return tcp_close(pcb);
+  }
+  
+  es = arg;
+
+  if(es->failed >= FAILED_MAX) {
+    close_conn(pcb, es);
+    tcp_abort(pcb);
+    return ERR_ABRT;
+  }
+  
+  if(es->p != NULL) {
+    ++es->failed;
+    send_buf(pcb, es);
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+echo_sent(void *arg, struct tcp_pcb *pcb, u16_t len)
+{
+  struct echo_state *es;
+  
+  es = arg;
+
+  if(es != NULL && es->p != NULL) {
+    send_buf(pcb, es);
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+echo_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+  struct echo_state *es;
+  
+  es = arg;
+
+  if(p == NULL) {
+    close_conn(pcb, es);
+    return ERR_OK;
+  }
+  
+  if(es->p != NULL) {
+    pbuf_chain(es->p, p);
+  } else {
+    es->p = p;
+  }
+
+  send_buf(pcb, es);
+  
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+echo_accept(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+  struct echo_state *es;
+
+  tcp_setprio(pcb, TCP_PRIO_MIN);
+  
+  /* Allocate memory for the structure that holds the state of the
+     connection. */
+  es = mem_malloc(sizeof(struct echo_state));
+
+  if(es == NULL) {
+    return ERR_MEM;
+  }
+  
+  /* Initialize the structure. */
+  es->p = NULL;
+  es->failed = 0;
+
+  /* Tell TCP that this is the structure we wish to be passed for our
+     callbacks. */
+  tcp_arg(pcb, es);
+
+  /* Tell TCP that we wish to be informed of incoming data by a call
+     to the http_recv() function. */
+#if 0
+  tcp_recv(pcb, echo_recv);
+  
+  tcp_err(pcb, echo_err);
+#endif  /* 0 */
+  
+  tcp_poll(pcb, echo_poll, 2);
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+echo_init(void)
+{
+  struct tcp_pcb *pcb;
+
+  pcb = tcp_new();
+  tcp_bind(pcb, IP_ADDR_ANY, 7);
+  pcb = tcp_listen(pcb);
+#if 0
+  tcp_accept(pcb, echo_accept);
+#endif /* 0 */
+}
+/*-----------------------------------------------------------------------------------*/
+err_t
+lwip_tcp_event(void *arg, struct tcp_pcb *pcb,
+	       enum lwip_event ev, struct pbuf *p,
+	       u16_t size, err_t err)
+{
+  switch(ev) {
+  case LWIP_EVENT_ACCEPT:
+    return echo_accept(arg, pcb, err);
+  case LWIP_EVENT_SENT:
+    return echo_sent(arg, pcb, size);
+  case LWIP_EVENT_RECV:
+    return echo_recv(arg, pcb, p, err);
+  case LWIP_EVENT_ERR:
+    echo_err(arg, err);
+    break;
+  case LWIP_EVENT_POLL:
+    return echo_poll(arg, pcb);
+  default:
+    break;
+  }
+  
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+

proj/minimal/lwipopts.h

@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIPOPTS_H__
+#define __LWIPOPTS_H__
+
+#define NO_SYS 1
+#define LWIP_EVENT_API 1
+
+/* ---------- Memory options ---------- */
+/* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
+   lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
+   byte alignment -> define MEM_ALIGNMENT to 2. */
+#define MEM_ALIGNMENT           2
+
+/* MEM_SIZE: the size of the heap memory. If the application will send
+a lot of data that needs to be copied, this should be set high. */
+#define MEM_SIZE                1000
+
+/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
+   sends a lot of data out of ROM (or other static memory), this
+   should be set high. */
+#define MEMP_NUM_PBUF           8
+/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
+   per active UDP "connection". */
+#define MEMP_NUM_UDP_PCB        4
+/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
+   connections. */
+#define MEMP_NUM_TCP_PCB        2
+/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
+   connections. */
+#define MEMP_NUM_TCP_PCB_LISTEN 8
+/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
+   segments. */
+#define MEMP_NUM_TCP_SEG        8
+
+/* The following four are used only with the sequential API and can be
+   set to 0 if the application only will use the raw API. */
+/* MEMP_NUM_NETBUF: the number of struct netbufs. */
+#define MEMP_NUM_NETBUF         0
+/* MEMP_NUM_NETCONN: the number of struct netconns. */
+#define MEMP_NUM_NETCONN        0
+/* MEMP_NUM_APIMSG: the number of struct api_msg, used for
+   communication between the TCP/IP stack and the sequential
+   programs. */
+#define MEMP_NUM_API_MSG        0
+/* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
+   for sequential API communication and incoming packets. Used in
+   src/api/tcpip.c. */
+#define MEMP_NUM_TCPIP_MSG      0
+/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
+   timeouts. */
+#define MEMP_NUM_SYS_TIMEOUT    0
+
+/* ---------- Pbuf options ---------- */
+/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
+#define PBUF_POOL_SIZE          8
+
+/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
+#define PBUF_POOL_BUFSIZE       128
+
+/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
+   link level header. */
+#define PBUF_LINK_HLEN          16
+
+/* ---------- TCP options ---------- */
+#define LWIP_TCP                1
+#define TCP_TTL                 255
+
+/* Controls if TCP should queue segments that arrive out of
+   order. Define to 0 if your device is low on memory. */
+#define TCP_QUEUE_OOSEQ         0
+
+/* TCP Maximum segment size. */
+#define TCP_MSS                 128
+
+/* TCP sender buffer space (bytes). */
+#define TCP_SND_BUF             256
+
+/* TCP sender buffer space (pbufs). This must be at least = 2 *
+   TCP_SND_BUF/TCP_MSS for things to work. */
+#define TCP_SND_QUEUELEN        4 * TCP_SND_BUF/TCP_MSS
+
+/* TCP receive window. */
+#define TCP_WND                 512
+
+/* Maximum number of retransmissions of data segments. */
+#define TCP_MAXRTX              12
+
+/* Maximum number of retransmissions of SYN segments. */
+#define TCP_SYNMAXRTX           4
+
+/* ---------- ARP options ---------- */
+#define ARP_TABLE_SIZE 10
+
+/* ---------- IP options ---------- */
+/* Define IP_FORWARD to 1 if you wish to have the ability to forward
+   IP packets across network interfaces. If you are going to run lwIP
+   on a device with only one network interface, define this to 0. */
+#define IP_FORWARD              0
+
+/* If defined to 1, IP options are allowed (but not parsed). If
+   defined to 0, all packets with IP options are dropped. */
+#define IP_OPTIONS              1
+
+/* ---------- ICMP options ---------- */
+#define ICMP_TTL                255
+
+
+/* ---------- DHCP options ---------- */
+/* Define LWIP_DHCP to 1 if you want DHCP configuration of
+   interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
+   turning this on does currently not work. */
+#define LWIP_DHCP               0
+
+/* 1 if you want to do an ARP check on the offered address
+   (recommended). */
+#define DHCP_DOES_ARP_CHECK     1
+
+/* ---------- UDP options ---------- */
+#define LWIP_UDP                0
+#define UDP_TTL                 255
+
+
+/* ---------- Statistics options ---------- */
+/*#define STATS*/
+
+#ifdef STATS
+#define LINK_STATS
+#define IP_STATS
+#define ICMP_STATS
+#define UDP_STATS
+#define TCP_STATS
+#define MEM_STATS
+#define MEMP_STATS
+#define PBUF_STATS
+#define SYS_STATS
+#endif /* STATS */
+
+#endif /* __LWIPOPTS_H__ */

proj/minimal/main.c

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/sys.h"
+
+#include "lwip/stats.h"
+
+#include "lwip/ip.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+
+#include "mintapif.h"
+
+/*-----------------------------------------------------------------------------------*/
+int
+main(int argc, char **argv)
+{
+  struct ip_addr ipaddr, netmask, gw;
+  struct netif *netif;
+  
+#ifdef PERF
+  perf_init("/tmp/minimal.perf");
+#endif /* PERF */
+#ifdef STATS
+  stats_init();
+#endif /* STATS */
+
+  mem_init();
+  memp_init();
+  pbuf_init(); 
+  netif_init();
+  ip_init();
+  udp_init();
+  tcp_init();
+  printf("TCP/IP initialized.\n");
+  
+  IP4_ADDR(&gw, 192,168,0,1);
+  IP4_ADDR(&ipaddr, 192,168,0,2);
+  IP4_ADDR(&netmask, 255,255,255,0);
+
+  netif = netif_add(&ipaddr, &netmask, &gw, mintapif_init, ip_input);
+  
+  netif_set_default(netif);
+
+  echo_init();
+  
+  printf("Applications started.\n");
+    
+
+  while(1) {
+    
+    if(mintapif_wait(netif, 100) == MINTAPIF_TIMEOUT) {
+      tcp_tmr();
+    }
+    
+  }
+  
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+
+
+
+
+
+
+
+

proj/minimal/mintapif.c

@@ -0,0 +1,354 @@
+/*-----------------------------------------------------------------------------------*/
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+
+#ifdef linux
+#include <sys/ioctl.h>
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#define DEVTAP "/dev/net/tun"
+#else  /* linux */
+#define DEVTAP "/dev/tap0"
+#endif /* linux */
+
+#include "lwip/stats.h"
+#include "lwip/mem.h"
+#include "netif/etharp.h"
+
+#include "mintapif.h"
+
+/* Define those to better describe your network interface. */
+#define IFNAME0 'e'
+#define IFNAME1 't'
+
+struct mintapif {
+  struct eth_addr *ethaddr;
+  /* Add whatever per-interface state that is needed here. */
+  u32_t lasttime;
+  int fd;
+};
+
+static const struct eth_addr ethbroadcast = {{0xff,0xff,0xff,0xff,0xff,0xff}};
+
+/* Forward declarations. */
+static void  mintapif_input(struct netif *netif);
+static err_t mintapif_output(struct netif *netif, struct pbuf *p,
+			       struct ip_addr *ipaddr);
+
+/*-----------------------------------------------------------------------------------*/
+static void
+low_level_init(struct netif *netif)
+{
+  struct mintapif *mintapif;
+  char buf[1024];
+
+  mintapif = netif->state;
+  
+  /* Obtain MAC address from network interface. */
+  mintapif->ethaddr->addr[0] = 1;
+  mintapif->ethaddr->addr[1] = 2;
+  mintapif->ethaddr->addr[2] = 3;
+  mintapif->ethaddr->addr[3] = 4;
+  mintapif->ethaddr->addr[4] = 5;
+  mintapif->ethaddr->addr[5] = 6;
+
+  /* Do whatever else is needed to initialize interface. */  
+  
+  mintapif->fd = open(DEVTAP, O_RDWR);
+  if(mintapif->fd == -1) {
+    perror("tapif: tapif_init: open");
+    exit(1);
+  }
+
+#ifdef linux
+  {
+    struct ifreq ifr;
+    memset(&ifr, 0, sizeof(ifr));
+    ifr.ifr_flags = IFF_TAP|IFF_NO_PI;
+    if (ioctl(mintapif->fd, TUNSETIFF, (void *) &ifr) < 0) {
+      perror(buf);
+      exit(1);
+    }
+  }
+#endif /* Linux */
+
+  snprintf(buf, sizeof(buf), "ifconfig tap0 inet %d.%d.%d.%d",
+           ip4_addr1(&(netif->gw)),
+           ip4_addr2(&(netif->gw)),
+           ip4_addr3(&(netif->gw)),
+           ip4_addr4(&(netif->gw)));
+  
+  system(buf);
+
+  mintapif->lasttime = 0;
+
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * low_level_output():
+ *
+ * Should do the actual transmission of the packet. The packet is
+ * contained in the pbuf that is passed to the function. This pbuf
+ * might be chained.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+
+static err_t
+low_level_output(struct netif *netif, struct pbuf *p)
+{
+  struct mintapif *mintapif;
+  struct pbuf *q;
+  char buf[1500];
+  char *bufptr;
+
+  mintapif = netif->state;
+  
+  /* initiate transfer(); */
+  
+  bufptr = &buf[0];
+  
+  for(q = p; q != NULL; q = q->next) {
+    /* Send the data from the pbuf to the interface, one pbuf at a
+       time. The size of the data in each pbuf is kept in the ->len
+       variable. */    
+    /* send data from(q->payload, q->len); */
+    bcopy(q->payload, bufptr, q->len);
+    bufptr += q->len;
+  }
+
+  /* signal that packet should be sent(); */
+  if(write(mintapif->fd, buf, p->tot_len) == -1) {
+    perror("tapif: write");
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * low_level_input():
+ *
+ * Should allocate a pbuf and transfer the bytes of the incoming
+ * packet from the interface into the pbuf.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static struct pbuf *
+low_level_input(struct mintapif *mintapif)
+{
+  struct pbuf *p, *q;
+  u16_t len;
+  char buf[1500];
+  char *bufptr;
+
+  /* Obtain the size of the packet and put it into the "len"
+     variable. */
+  len = read(mintapif->fd, buf, sizeof(buf));
+
+  /*  if(((double)rand()/(double)RAND_MAX) < 0.1) {
+    printf("drop\n");
+    return NULL;
+    }*/
+
+  
+  /* We allocate a pbuf chain of pbufs from the pool. */
+  p = pbuf_alloc(PBUF_LINK, len, PBUF_POOL);
+  
+  if(p != NULL) {
+    /* We iterate over the pbuf chain until we have read the entire
+       packet into the pbuf. */
+    bufptr = &buf[0];
+    for(q = p; q != NULL; q = q->next) {
+      /* Read enough bytes to fill this pbuf in the chain. The
+         avaliable data in the pbuf is given by the q->len
+         variable. */
+      /* read data into(q->payload, q->len); */
+      bcopy(bufptr, q->payload, q->len);
+      bufptr += q->len;
+    }
+    /* acknowledge that packet has been read(); */
+  } else {
+    /* drop packet(); */
+    printf("Could not allocate pbufs\n");
+  }
+
+  return p;  
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * mintapif_output():
+ *
+ * This function is called by the TCP/IP stack when an IP packet
+ * should be sent. It calls the function called low_level_output() to
+ * do the actuall transmission of the packet.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static err_t
+mintapif_output(struct netif *netif, struct pbuf *p,
+		  struct ip_addr *ipaddr)
+{
+  p = etharp_output(netif, ipaddr, p);
+  if(p != NULL) {
+    return low_level_output(netif, p);
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * mintapif_input():
+ *
+ * This function should be called when a packet is ready to be read
+ * from the interface. It uses the function low_level_input() that
+ * should handle the actual reception of bytes from the network
+ * interface.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static void
+mintapif_input(struct netif *netif)
+{
+  struct mintapif *mintapif;
+  struct eth_hdr *ethhdr;
+  struct pbuf *p, *q;
+
+
+  mintapif = netif->state;
+  
+  p = low_level_input(mintapif);
+
+  if(p != NULL) {
+
+#ifdef LINK_STATS
+    stats.link.recv++;
+#endif /* LINK_STATS */
+
+    ethhdr = p->payload;
+
+    q = NULL;
+    switch(htons(ethhdr->type)) {
+    case ETHTYPE_IP:
+      q = etharp_ip_input(netif, p);
+      pbuf_header(p, -14);
+      netif->input(p, netif);
+      break;
+    case ETHTYPE_ARP:
+      q = etharp_arp_input(netif, mintapif->ethaddr, p);
+      break;
+    default:
+      pbuf_free(p);
+      break;
+    }
+    if(q != NULL) {
+      low_level_output(netif, q);
+      pbuf_free(q);
+    }
+
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * mintapif_init():
+ *
+ * Should be called at the beginning of the program to set up the
+ * network interface. It calls the function low_level_init() to do the
+ * actual setup of the hardware.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+void
+mintapif_init(struct netif *netif)
+{
+  struct mintapif *mintapif;
+    
+  mintapif = mem_malloc(sizeof(struct mintapif));
+  netif->state = mintapif;
+  netif->name[0] = IFNAME0;
+  netif->name[1] = IFNAME1;
+  netif->output = mintapif_output;
+  netif->linkoutput = low_level_output;
+  
+  mintapif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
+  
+  low_level_init(netif);
+}
+/*-----------------------------------------------------------------------------------*/
+enum mintapif_signal
+mintapif_wait(struct netif *netif, u16_t time)
+{
+  fd_set fdset;
+  struct timeval tv, now;
+  struct timezone tz;
+  int ret;
+  struct mintapif *mintapif;
+
+  mintapif = netif->state;
+
+  while(1) {
+  
+    if(mintapif->lasttime >= (u32_t)time * 1000) {
+      mintapif->lasttime = 0;
+      return MINTAPIF_TIMEOUT;
+    }
+    
+    tv.tv_sec = 0;
+    tv.tv_usec = (u32_t)time * 1000 - mintapif->lasttime;
+    
+    
+    FD_ZERO(&fdset);
+    FD_SET(mintapif->fd, &fdset);
+    
+    gettimeofday(&now, &tz);
+    ret = select(mintapif->fd + 1, &fdset, NULL, NULL, &tv);
+    if(ret == 0) {
+      mintapif->lasttime = 0;    
+      return MINTAPIF_TIMEOUT;
+    } 
+    gettimeofday(&tv, &tz);
+    mintapif->lasttime += (tv.tv_sec - now.tv_sec) * 1000000 + (tv.tv_usec - now.tv_usec);
+
+    mintapif_input(netif);
+  }
+  
+  return MINTAPIF_PACKET;
+}

proj/minimal/mintapif.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __MINTAPIF_H__
+#define __MINTAPIF_H__
+
+#include "lwip/netif.h"
+
+enum mintapif_signal {
+  MINTAPIF_TIMEOUT,
+  MINTAPIF_PACKET
+};
+
+void mintapif_init(struct netif *netif);
+enum mintapif_signal mintapif_wait(struct netif *netif, u16_t time);
+
+#endif /* __MINTAPIF_H__ */

proj/unixsim/Makefile

@@ -0,0 +1,111 @@
+# Copyright (c) 2001, Swedish Institute of Computer Science.
+# All rights reserved. 
+#
+# Redistribution and use in source and binary forms, with or without 
+# modification, are permitted provided that the following conditions 
+# are met: 
+#
+# 1. Redistributions of source code must retain the above copyright 
+#    notice, this list of conditions and the following disclaimer. 
+# 2. Redistributions in binary form must reproduce the above copyright 
+#    notice, this list of conditions and the following disclaimer in the 
+#    documentation and/or other materials provided with the distribution. 
+# 3. Neither the name of the Institute nor the names of its contributors 
+#    may be used to endorse or promote products derived from this software 
+#    without specific prior written permission. 
+#
+# THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+# SUCH DAMAGE. 
+#
+# This file is part of the lwIP TCP/IP stack.
+# 
+# Author: Adam Dunkels <adam@sics.se>
+#
+# $Id: Makefile,v 1.1.1.1 2002/10/19 12:59:37 likewise Exp $
+
+CCDEP=gcc
+CC=gcc
+CFLAGS=-g -Wall -DIPv4 -DLWIP_DEBUG -pedantic
+LDFLAGS=-lpcap
+LWIPARCH=unix
+ARFLAGS=rs
+LWIPDIR=../../src
+
+CFLAGS:=$(CFLAGS) \
+	-I$(LWIPDIR)/include -I$(LWIPDIR)/arch/$(LWIPARCH)/include -I$(LWIPDIR)/include/ipv4 \
+	-Iapps -I.
+
+# COREFILES, CORE4FILES: The minimum set of files needed for lwIP.
+COREFILES=$(LWIPDIR)/core/mem.c $(LWIPDIR)/core/memp.c $(LWIPDIR)/core/netif.c \
+	$(LWIPDIR)/core/pbuf.c $(LWIPDIR)/core/stats.c $(LWIPDIR)/core/sys.c \
+        $(LWIPDIR)/core/tcp.c $(LWIPDIR)/core/tcp_input.c \
+        $(LWIPDIR)/core/tcp_output.c $(LWIPDIR)/core/udp.c 
+CORE4FILES=$(LWIPDIR)/core/ipv4/icmp.c $(LWIPDIR)/core/ipv4/ip.c \
+	$(LWIPDIR)/core/inet.c $(LWIPDIR)/core/ipv4/ip_addr.c
+
+
+# APIFILES: The files which implement the sequential and socket APIs.
+APIFILES=$(LWIPDIR)/api/api_lib.c $(LWIPDIR)/api/api_msg.c $(LWIPDIR)/api/tcpip.c \
+	$(LWIPDIR)/api/err.c $(LWIPDIR)/api/sockets.c 
+
+# NETIFFILES: Files implementing various generic network interface functions.'
+NETIFFILES=$(LWIPDIR)/netif/loopif.c \
+	$(LWIPDIR)/netif/tcpdump.c $(LWIPDIR)/netif/etharp.c
+
+# ARCHFILES: Archiecture specific files.
+ARCHFILES=$(wildcard $(LWIPDIR)/arch/$(LWIPARCH)/*.c $(LWIPDIR)/arch/$(LWIPARCH)/netif/*.c)
+
+# APPFILES: Applications.
+APPFILES=apps/fs.c apps/httpd.c \
+	apps/udpecho.c apps/tcpecho.c \
+	apps/shell.c 
+
+# LWIPFILES: All the above.
+LWIPFILES=$(COREFILES) $(CORE4FILES) $(APIFILES) $(NETIFFILES) $(ARCHFILES)
+LWIPFILESW=$(wildcard $(LWIPFILES))
+LWIPOBJS=$(notdir $(LWIPFILESW:.c=.o))
+
+LWIPLIB=liblwip4.a
+APPLIB=liblwipapps.a
+APPOBJS=$(notdir $(APPFILES:.c=.o))
+
+%.o:
+	$(CC) $(CFLAGS) -c $(<:.o=.c)
+
+all ipv4 compile: simhost simnode simrouter
+.PHONY: all
+
+clean:
+	rm -f *.o $(LWIPLIB) $(APPLIB) simhost simnode simrouter *.s .depend* *.core core
+
+depend dep: .depend
+
+include .depend
+
+$(APPLIB): $(APPOBJS)
+	$(AR) $(ARFLAGS) $(APPLIB) $?
+
+$(LWIPLIB): $(LWIPOBJS)
+	$(AR) $(ARFLAGS) $(LWIPLIB) $?
+
+.depend: simhost.c simnode.c simrouter.c $(LWIPFILES) $(APPFILES)
+	$(CCDEP) $(CFLAGS) -MM $^ > .depend || rm -f .depend
+
+simhost: .depend $(LWIPLIB) $(APPLIB) simhost.o $(APPFILES)
+	$(CC) $(CFLAGS) $(LDFLAGS) -pthread -o simhost simhost.o $(APPLIB) $(LWIPLIB)
+
+simrouter: .depend $(LWIPLIB) $(APPLIB) simrouter.o
+	$(CC) $(CFLAGS) $(LDFLAGS) -pthread -o simrouter simrouter.o $(APPLIB) $(LWIPLIB) 
+
+simnode: .depend $(LWIPLIB) $(APPLIB) simnode.o 
+	$(CC) $(CFLAGS) $(LDFLAGS) -pthread -o simnode simnode.o $(APPLIB) $(LWIPLIB)
+

proj/unixsim/README

@@ -0,0 +1,47 @@
+This directory contains an example of how a project using lwIP might
+look. It is also the development platform of lwIP, since it can be run
+as a user process under FreeBSD or Linux. There are also a number of
+example applications (including a simple web server) in the apps/
+directory.
+
+Some short instructions on how to build and run lwIP on a FreeBSD or
+Linux host. For FreeBSD, the tap interface must be enabled in the
+kernel configuration and the kernel must be recompiled. The tap
+interface is enabled by adding the line "pseudo-device tap" in the
+kernel configuration. See Chapter 9 in the FreeBSD handbook for
+instructions on how to build a custom FreeBSD kernel.
+
+* Compile the code. This must be done by using GNU Make. Under
+  FreeBSD, GNU Make can be found in the ports collection under
+  /usr/ports/devel/gmake (type "make install distclean" to
+  install). Under Linux, GNU Make is the default "make".
+
+  > gmake         (FreeBSD)
+
+  > make          (Linux)
+
+* The compilation process produces the executable file "simhost". To
+  run this, you have to be root.
+
+  > su            (Type password for the root account)
+  # ./simhost
+
+* The lwIP TCP/IP stack is now running with IP address
+  192.168.0.2. Some things that you can try:
+
+  To see the packets that are going to and from the lwIP stack, run
+  tcpdump:
+
+  # tcpdump -l -n -i tap0
+
+  You can ping lwIP:
+
+  > ping 192.168.0.2
+
+  For a telnet shell, run:
+
+  > telnet 192.168.0.2
+  
+  Finally, "simhost" also includes a simple web server; the URL is
+  of course http://192.168.0.2/.
+

proj/unixsim/apps/fs.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#include "lwip/def.h"
+#include "fs.h"
+#include "fsdata.h"
+#include "fsdata.c"
+
+/*-----------------------------------------------------------------------------------*/
+
+
+/*-----------------------------------------------------------------------------------*/
+int
+fs_open(char *name, struct fs_file *file)
+{
+  struct fsdata_file_noconst *f;
+
+  for(f = (struct fsdata_file_noconst *)FS_ROOT; f != NULL; f = (struct fsdata_file_noconst *)f->next) {
+    if(!strcmp(name, f->name)) {
+      file->data = f->data;
+      file->len = f->len;
+      return 1;
+    }
+  }
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/

proj/unixsim/apps/fs.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __FS_H__
+#define __FS_H__
+
+struct fs_file {
+  char *data;
+  int len;
+};
+
+/* file must be allocated by caller and will be filled in
+   by the function. */
+int fs_open(char *name, struct fs_file *file);
+
+#endif /* __FS_H__ */

proj/unixsim/apps/fs/documentation.html

@@ -0,0 +1,191 @@
+
+
+
+
+
+
+
+
+
+
+
+
+<html>
+<head><title>lwIP - A Lightweight TCP/IP Stack - Documentation</title></head>
+
+
+<body bgcolor="white">
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td>
+<center><h1>lwIP - A Lightweight TCP/IP Stack</h1></center>
+</td></tr></table>
+
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+[Documentation]
+
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+</td></tr>
+<tr>
+<td><center><h2>Documentation</h2></center>
+</td></tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0"><tr>
+<td width="50">
+&nbsp;
+</td>
+<td bgcolor="white" width="540">
+
+<ul>
+<li><a href="os.html">Using lwIP with and without an operating
+system</a>.
+<br><br>
+
+<li>The lwIP source archive contains documentation on how to port lwIP
+and how to write applications using the native API. They can also be
+found here: <a href="doc/sys_arch.txt">sys_arch.txt</a>, <a
+href="doc/rawapi.txt">rawapi.txt</a>. 
+<br><br>
+
+<li>Selected messages from the mailinglist: <a
+href="maillist/msg00231.html">lwIP memory buffers and allocators</a>,
+<a href="maillist/msg00227.html">Threads, semaphores and raw interface 
+question</a>, <a href="maillist/msg00242.html">Threads, semaphores and
+raw interface question [2]</a>. <a href="maillist/msg00460.html">Some notes on using lwIP with the development enviroment ADS
+1.1 from ARM.</a>
+<br><br>
+
+<li>A report describing the design and implementation of an old
+version of lwIP. The algorithms and data structures used both in the
+protocol implementations and in the sub systems such as the memory and
+buffer management systems are described. Also included in this report
+is a reference manual for the lwIP sequential API and some code
+examples of using lwIP. <a href="doc/lwip.pdf">PDF</a>, <a
+href="doc/lwip.ps.gz">.ps.gz</a>.
+
+<br><br>
+
+<li>Slides from a presentation that talks a bit about lwIP: <a
+href="doc/pres.pdf">PDF</a> (86k), <a href="doc/pres.ps.gz">.ps.gz</a>
+(36k). 
+</ul>
+
+<p align="justify">
+For more documentation regarding lwIP and a proxy architecture to
+support TCP/IP communication for small clients, look in <a
+href="/~adam/publications.html">Adam Dunkels' masters thesis</a>. 
+</p>
+
+
+<p align="justify">
+The <a href="mailinglist.html">lwIP mailing list</a> can be used to
+discuss lwIP.
+</p>
+
+<p align="justify">
+For questions or suggestions, please contact the author at <a
+href="mailto:Adam Dunkels <adam@sics.se>">Adam Dunkels
+&lt;adam@sics.se&gt;</a>.  
+</p>
+
+
+<p align="right">        
+<font size="-1"><i>
+$Date: 2002/10/19 13:00:01 $
+</i></font>
+</p>        
+        
+
+</td>
+<td width="50">
+&nbsp;
+</td>
+</tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+[Documentation]
+
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+
+</td></tr><tr>
+<td>
+<div align="right">
+<a href="http://www.sics.se/~adam/">Adam Dunkels</a></div>
+</td>
+</tr>
+</table>
+
+</body>
+</html>

proj/unixsim/apps/fs/download.html

@@ -0,0 +1,232 @@
+
+
+
+
+
+
+
+
+
+
+
+
+<html>
+<head><title>lwIP - A Lightweight TCP/IP Stack - Download</title></head>
+
+
+<body bgcolor="white">
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td>
+<center><h1>lwIP - A Lightweight TCP/IP Stack</h1></center>
+</td></tr></table>
+
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+[Download]
+
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+</td></tr>
+<tr>
+<td><center><h2>Download</h2></center>
+</td></tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0"><tr>
+<td width="50">
+&nbsp;
+</td>
+<td bgcolor="white" width="540">
+
+
+<p align="justify">        
+lwIP is avaliable for download provided that you read and accept <a
+href="licence.html">this</a> BSD-style license.
+</p>
+
+<h3>Release versions</h3>
+<p align="justify">
+The latest version is 0.5.3. (Older versions are also provided for an
+unknown reason.)
+</p>
+<ul>
+<li>Version 0.5.3 (latest): <a
+href="download/?f=lwip-0.5.3.tar.gz">lwip-0.5.3.tar.gz</a> 
+<br><br>
+
+<li>
+<font size="-2">
+Obsolete versions: <a
+href="download/?f=lwip-0.5.2.tar.gz">lwip-0.5.2.tar.gz</a>
+<a
+href="download/?f=lwip-0.5.1.tar.gz">lwip-0.5.1.tar.gz</a>
+<a
+href="download/?f=lwip-0.5.0.tar.gz">lwip-0.5.0.tar.gz</a>
+<a
+href="download/?f=lwip-0.4.2.tar.gz">lwip-0.4.2.tar.gz</a>
+<a
+href="download/?f=lwip-0.4.1.tar.gz">lwip-0.4.1.tar.gz</a> 
+<a
+href="download/?f=lwip-0.4.tar.gz">lwip-0.4.tar.gz</a> 
+<a
+href="download/?f=lwip-0.3.1.tar.gz">lwip-0.3.1.tar.gz</a> 
+<a
+href="download/?f=lwip-0.3.tar.gz">lwip-0.3.tar.gz</a> 
+<a
+href="download/?f=lwip-0.2.tar.gz">lwip-0.2.tar.gz</a>
+</font>
+<br>
+</ul>
+
+<h3>Development version</h3>
+<p align="justify">
+The latest development code from the CVS is also avaliable <a
+href="download/?f=lwip-cvs.tar.gz">here</a>. Note that this code may
+very well be unstable and might not even compile.
+</p>
+
+<h3>Source code online</h3>
+<p align="justify">
+Joe MacDonald has put an HTML version of the latest lwIP source code
+online at <a
+href="http://www.deserted.net/lwIP/">http://www.deserted.net/lwIP/</a>. 
+</p>
+
+<h3>Ports</h3>
+<p align="justify">
+Florian Shulze has ported lwIP to DJGPP/MS-DOS and to Visual C++
+6.0/Win32. They can be downloaded <a
+href="http://homepages.fh-giessen.de/~hg10836/dev/djgpp/lwipdjgpptest-0.1.zip">here</a>
+(DJGPP/MS-DOS) and <a
+href="http://homepages.fh-giessen.de/~hg10836/crowproductions/dev/lwip-win32-msvc-0.1.zip">here</a>
+(Visual C++ 6.0/Win32).
+</p>
+
+<h3>Add-ons/drivers/applications</h3>
+
+<h4>DHCP client</h4>
+<p align="justify">
+Leon Woestenberg from Axon Digital Design B.V. has written a CS8900a
+network interface driver and is currently developing a DHCP client for
+lwIP. They can both be found <a
+href="http://www.esrac.ele.tue.nl/~leon/lwip/">here</a>. The plan is
+to eventually integrate Leon's DHCP client in the main lwIP 
+distribution.
+</p>
+
+<h4>IGMPv2 implementation</h4>
+<p align="justify">
+Steve Reynolds of Citel Technologies Ltd. has donated his IGMPv2
+implementation for lwIP to the community. It is avaliable for download
+<a href="download/igmpfiles.zip">here</a> (note that the copyright and
+license differs slightly from lwIP - read the license in the igmp.c
+file). The plan is to integrate his code into the main lwIP
+distribution.
+</p>
+
+<h4>Alternative BSD socket layer</h4>
+<p align="justify">
+Paul Sheer has incorporated lwIP into his PaulOS system and has
+written an alternative BSD socket layer. It is avaliable for download
+<a href="download/bsdsocket.c">here</a>. It is copyright Paul Sheer
+and licensed under the <a
+href="http://www.gnu.org/licenses/gpl.html">GNU GPL</a>. 
+</p>
+
+<p align="right">        
+<font size="-1"><i>
+$Date: 2002/10/19 13:00:06 $
+</i></font>
+</p>
+
+</td>
+<td width="50">
+&nbsp;
+</td>
+</tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+[Download]
+
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+
+</td></tr><tr>
+<td>
+<div align="right">
+<a href="http://www.sics.se/~adam/">Adam Dunkels</a></div>
+</td>
+</tr>
+</table>
+
+</body>
+</html>

proj/unixsim/apps/fs/licence.html

@@ -0,0 +1,169 @@
+
+
+
+
+
+
+
+
+
+
+
+
+<html>
+<head><title>lwIP - A Lightweight TCP/IP Stack - lwIP source code licence</title></head>
+
+
+<body bgcolor="white">
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td>
+<center><h1>lwIP - A Lightweight TCP/IP Stack</h1></center>
+</td></tr></table>
+
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+</td></tr>
+<tr>
+<td><center><h2>lwIP source code licence</h2></center>
+</td></tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0"><tr>
+<td width="50">
+&nbsp;
+</td>
+<td bgcolor="white" width="540">
+
+Copyright (c) 2001, Swedish Institute of Computer Science.
+All rights reserved.<br>
+<br>
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions 
+are met:<br>
+<ol>
+<li> Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.<br> 
+<br>
+<li> Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the
+distribution.<br> 
+<br>
+<li> Neither the name of the Institute nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission. <br> 
+</ol>
+<br>
+THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS `AS IS' AND 
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+SUCH DAMAGE. <br>
+
+
+
+<p align="right">        
+<font size="-1"><i>
+$Date: 2002/10/19 13:00:01 $
+</i></font>
+</p>
+
+</td>
+<td width="50">
+&nbsp;
+</td>
+</tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+
+</td></tr><tr>
+<td>
+<div align="right">
+<a href="http://www.sics.se/~adam/">Adam Dunkels</a></div>
+</td>
+</tr>
+</table>
+
+</body>
+</html>

proj/unixsim/apps/fs/links.html

@@ -0,0 +1,266 @@
+
+
+
+
+
+
+
+
+
+
+
+
+<html>
+<head><title>lwIP - A Lightweight TCP/IP Stack - Links</title></head>
+
+
+<body bgcolor="white">
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td>
+<center><h1>lwIP - A Lightweight TCP/IP Stack</h1></center>
+</td></tr></table>
+
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+[Links]
+
+
+
+
+<hr>
+</td></tr>
+<tr>
+<td><center><h2>Links</h2></center>
+</td></tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0"><tr>
+<td width="50">
+&nbsp;
+</td>
+<td bgcolor="white" width="540">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+lwIP pages:
+<ul>
+<li><a href="http://www.esrac.ele.tue.nl/~leon/lwip/">Leon Woestenberg's lwIP page</a>
+</ul>
+
+Companies using lwIP in their products:
+<ul>
+<li>UK based <a href="http://www.tangentdevices.co.uk/">Tangent Devices Ltd</a> are incorporating lwIP in their film
+and video post-production equipment.
+<li><a href="http://www.axon.tv">Axon Digital Design BV</a> in The
+Netherlands is merging lwIP with their current IP stack for use in the
+Synapse modular broadcasting system.
+</ul>
+
+Projects using lwIP:
+<ul>
+<li><a href="http://www.cdt.luth.se/projects/arena/">The ARENA Project</a> - Hockey players equipped with pulse and breathing sensors running lwIP.<br> 
+<li><a href="http://bart.sm.luth.se/eis2001/">The Embedded Internet Systems 2001 Student Project</a> - Flow meter and belt tension sensors
+running lwIP.<br>
+<li><a href="http://dcdev.allusion.net/">KOS</a> - The KOS operating system for
+Sega Dreamcast uses lwIP.<br>
+</ul>
+
+Other small TCP/IP implementations:
+<ul>
+<li><a href="http://dunkels.com/adam/uip/">uIP</a> - A very small TCP/IP 
+implementation, suitable for systems with hundreds of bytes free RAM
+and a few kilobytes of free code space.<br>
+<li><a href="http://ucip.sourceforge.net/">uC/IP</a> - uC/IP is a BSD-based
+TCP/IP protocol stack for microcontrollers.<br>
+<li><a href="http://liquorice.sourceforge.net">Liquorice</a> - Liquorice
+includes a TCP/IP stack.<br>
+<li><a href="http://www.nenie.org/cpcip/">CPC/IP</a> - A TCP/IP stack for
+Amstrad CPCs.<br>
+<li><a href="http://lng.sourceforge.net/">LUnix</a> - LUnix contains a small
+TCP/IP stack.<br>
+<li><a href="http://www.sweetcherrie.com/jolz64/jos/">JOS</a> - JOS includes a
+TCP/IP implementation.<br>
+<li><a href="http://www.csonline.net/bpaddock/tinytcp/default.htm">TinyTCP</a> - A very slim
+TCP, IP, and FTP implementation.<br>
+<li><a href="http://kyllikki.fluff.org/hardware/wwwpic2/">WWWpic2</a> - Small
+HTTP/TCP/IP implementation for a PIC.<br>
+<li><a href="http://www.rmbeales.fsnet.co.uk/files/html/picserver/picservd.htm">PIC Web Server</a> - Small HTTP/TCP/IP/SLIP PIC implementation.<br>
+</ul>
+
+Very small web servers:
+<ul>
+<li><a href="http://world.std.com/~fwhite/ace/">webACE</a> - World's Smallest
+Web Server.<br>
+<li><a href="http://www-ccs.cs.umass.edu/~shri/iPic.html">iPIC</a> - A Match
+Head Sized Web Server.<br>
+</ul>
+
+Related RFCs:
+<ul>
+<li>J. Postel, <a
+href="ftp://ftp.ietf.org/rfc/rfc791.txt">Internet Protocol</a>, RFC791, September 1981.
+<li>J. Postel, <a
+href="ftp://ftp.ietf.org/rfc/rfc792.txt">Internet Control Message Protocol</a>, RFC792, September 1981.
+<li>J. Postel, <a
+href="ftp://ftp.ietf.org/rfc/rfc768.txt">User Datagram Protocol</a>, RFC768, August 1980.
+<li>J. Postel, <a
+href="ftp://ftp.ietf.org/rfc/rfc793.txt">Transmission Control Protocol</a>, RFC793, September 1981.
+<li>D. D. Clark, <a
+href="ftp://ftp.ietf.org/rfc/rfc813.txt">Window and Acknowledgement Strategy in TCP</a>, RFC813, July 1982.
+<li>D. D. Clark, <a
+href="ftp://ftp.ietf.org/rfc/rfc817.txt">Modularity and Efficiency in Protocol Implementation</a>, RFC817, July 1982.
+<li>R. Braden, <a
+href="ftp://ftp.ietf.org/rfc/rfc1122.txt">Requirements for Internet Hosts -- Communication Layers</a>, RFC1122, October 1989.
+<li>T. Mallory and A. Kullberg, <a
+href="ftp://ftp.ietf.org/rfc/rfc1141.txt">Incremental Updating of the Internet Checksum</a>, RFC1141, January 1990.
+<li>A. Rijsinghani, <a
+href="ftp://ftp.ietf.org/rfc/rfc1624.txt">Computation of the Internet Checksum via Incremental Update</a>, RFC1624, May 1994.
+<li>R. Braden, <a
+href="ftp://ftp.ietf.org/rfc/rfc1337.txt">TIME-WAIT Assasination Hazards in TCP</a>, RFC1337, May 1992.
+<li>B. Carpenter, <a
+href="ftp://ftp.ietf.org/rfc/rfc1958.txt">Architectural Principles of the Internet</a>, RFC1958, June 1996.
+<li>M. Allman, V. Paxson and W. Stevens, <a
+href="ftp://ftp.ietf.org/rfc/rfc2581.txt">TCP Congestion Control</a>, RFC2581, April 1999.
+<li>S. Parker and C. Schmechel, <a
+href="ftp://ftp.ietf.org/rfc/rfc2398.txt">Some Testing Tools for TCP Implementors</a>, RFC2398, August 1998.
+</ul>
+
+Related publications:
+<ul>
+<li>V. Jacobson. Congestion avoidance and control. In <i>Proceedings of
+the SIGCOMM '88 Conference</i>, Stanford, California, August 1988.
+<li>V. Jacobson. 4.3BSD TCP header prediction. <i>ACM Computer
+Communications Review</i>, 20(2), April 1990.
+<li>P. Karn and C. Partridge. Improving round-trip time estimates
+in reliablie transport protocols. In <i>Proceedings of the SIGCOMM '87
+Conference</i>, Stowe, Vermont, August 1987.
+<li>J. Kay and J. Pasquale. Profiling and Reducing Processing
+Overheads in TCP/IP. <i>IEEE/ACM Transactions of Networking</i>, 4(6), December 1996.
+<li>L. Larzon, M. Degermark, and S. Pink. UDP Lite for
+real-time multimedia applications. In <i>Proceedings of the IEEE
+International Conference of Communications</i>, Vancouver, British
+Columbia, Canada, June 1999.
+<li>P. E. McKenney and K. F. Dove. Efcient demultiplexing of
+incoming TCP packets. In <i>Proceedings of the SIGCOMM '92 Conference</i>, Baltimore, Maryland, August 1992.
+<li>C. Partridge and S. Pink. A faster UDP. <i>IEEE/ACM Transactions
+in Networking</i>, 1(4), August 1993.
+</ul>
+
+
+
+<p align="right">        
+<font size="-1"><i>
+$Date: 2002/10/19 13:00:02 $
+</i></font>
+</p>        
+        
+
+</td>
+<td width="50">
+&nbsp;
+</td>
+</tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+[Links]
+
+
+
+
+<hr>
+
+</td></tr><tr>
+<td>
+<div align="right">
+<a href="http://www.sics.se/~adam/">Adam Dunkels</a></div>
+</td>
+</tr>
+</table>
+
+</body>
+</html>

proj/unixsim/apps/fs/mailinglist.html

@@ -0,0 +1,187 @@
+
+
+
+
+
+
+
+
+
+
+
+
+<html>
+<head><title>lwIP - A Lightweight TCP/IP Stack - Mailing list</title></head>
+
+
+<body bgcolor="white">
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td>
+<center><h1>lwIP - A Lightweight TCP/IP Stack</h1></center>
+</td></tr></table>
+
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+[Mailing list]
+
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+</td></tr>
+<tr>
+<td><center><h2>Mailing list</h2></center>
+</td></tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0"><tr>
+<td width="50">
+&nbsp;
+</td>
+<td bgcolor="white" width="540">
+
+
+<p align="justify">
+The lwIP mailing list is the place to discuss lwIP. All topics related
+to lwIP, such as porting or using lwIP, writing device drivers or
+application programs for lwIP can be discussed here.
+</p>
+
+<h3>Archives</h3>
+<p align="justify">
+Archives can be found <a href="maillist/">here</a>.
+</p>
+
+<h3>Subscribe</h3>
+<p align="justify">
+To subscribe, send a mail to <a
+href="mailto:majordomo@sics.se">majordomo@sics.se</a> with the message
+<pre>
+subscribe lwip
+
+</pre>
+in the message body. The subject should be kept blank.
+</p>
+<p align="justify">
+In a few minutes, you should receive a welcome message and some
+information regarding the subscription, including instructions for
+unsubscribing. Save those messages for future reference. 
+</p>
+
+<p align="justify">
+You are now an lwIP mailing list subscriber!
+</p>
+
+<h3>Post</h3>
+<p align="justify">
+Posting to the lwIP mailing list is a simple as sending a mail to the
+address <a href="mailto:lwip@sics.se">lwip@sics.se</a>.
+</p>
+
+<h3>Unsubscribe</h3>
+<p align="justify">
+To subscribe, send a mail to <a
+href="mailto:majordomo@sics.se">majordomo@sics.se</a> with the message
+<pre>
+unsubscribe lwip
+
+</pre>
+in the message body. The subject should be kept blank.
+</p>
+
+<p align="right">        
+<font size="-1"><i>
+$Date: 2002/10/19 13:00:02 $
+</i></font>
+</p>        
+        
+
+</td>
+<td width="50">
+&nbsp;
+</td>
+</tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+[Mailing list]
+
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+
+</td></tr><tr>
+<td>
+<div align="right">
+<a href="http://www.sics.se/~adam/">Adam Dunkels</a></div>
+</td>
+</tr>
+</table>
+
+</body>
+</html>

proj/unixsim/apps/fs/os.html

@@ -0,0 +1,225 @@
+
+
+
+
+
+
+
+
+
+
+
+
+<html>
+<head><title>lwIP - A Lightweight TCP/IP Stack - OS vs non-OS</title></head>
+
+
+<body bgcolor="white">
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td>
+<center><h1>lwIP - A Lightweight TCP/IP Stack</h1></center>
+</td></tr></table>
+
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+</td></tr>
+<tr>
+<td><center><h2>OS vs non-OS</h2></center>
+</td></tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0"><tr>
+<td width="50">
+&nbsp;
+</td>
+<td bgcolor="white" width="540">
+
+<h2>Using lwIP with or without an operating system</h2>
+
+<p align="justify">
+There has been a few questions about how lwIP can be used in a
+standalone environment (i.e., an environment without a multi-threaded
+operating system) lately. The purpose of this document is to describe
+how lwIP is designed to be used with and without a multi-threaded
+operating system.
+</p>
+
+<center><img src="os.png"></center>
+
+<h3>The lwIP single-threaded core</h3>
+<p align="justify">
+The core of lwIP consists of the actual implementations of the IP,
+ICMP, UDP, and TCP protocols, as well as the support functions such as
+buffer and memory management. The core components are the only ones
+that are needed when lwIP is to be run in a single-threaded (non-OS)
+environment. 
+</p>
+<p align="justify">
+The core components can be viewed as a software library which has the
+following interface:
+</p>
+<ul>
+<li><tt>ip_input(pbuf, netif)</tt>: Takes an IP packet and the incoming network
+interface as arguments and does the TCP/IP processing for the packet.
+<li><tt>tcp_tmr()</tt>: Should be called every 100 ms. Does all TCP
+timer processing such as doing retransmissions.
+</ul>
+<p align="justify">
+Because none of the core functions ever needs to block when run in a
+single-threaded environment, the <tt>sys_arch</tt> (the operating
+system abstraction layer) does not need to implement locking
+semaphores or mailboxes. In future versions of lwIP, the dependancy of
+the <tt>sys_arch</tt> will be removed in the single-threaded case.
+</p>
+<p align="justify">
+A simple main loop for a single-threaded system might look
+like this:
+</p>
+<pre>
+  while(1) {
+    if(poll_driver(netif) == PACKET_READY) {
+      pbuf = get_packet(netif);
+      ip_input(pbuf, netif);
+    }
+
+    if(clock() - last_time == 100 * CLOCK_MS) {
+      tcp_tmr();
+      last_time = clock();
+    }    
+  }
+</pre>
+
+<h3>lwIP in a multi-threaded system</h3>
+<p align="justify">
+lwIP is designed to be able to be run in a multi-threaded system with
+applications running in concurrent threads. The model used in this
+case is that all TCP/IP processing is done in a single thread. The
+application thread communicate with the TCP/IP thread using the
+sequential API.
+</p>
+
+<center><img src="threads.png"></center>
+
+<p align="justify">
+The inter-thread communication is implemented in the two files
+<tt>api_lib.c</tt> and <tt>api_msg.c</tt>. The former contains the
+functions used by the application programs and the latter implements
+the TCP/IP stack interface. A third file, <tt>tcpip.c</tt>, handles
+incoming packets and timer events as described in the previous
+section. 
+</p>
+
+<p align="justify">
+When run in a multi-threaded environment, incoming packets are handled
+by the function <tt>tcpip_input()</tt>, which takes the same arguments
+as the <tt>ip_input()</tt> function. The difference between the two
+functions is that the <tt>tcpip_input()</tt> function does not process
+the incoming packet immediately. It merely puts the packet on a queue
+which later is drained by the TCP/IP thread.
+</p>
+
+<p align="justify">
+When being run in a multi-threaded system, timer events are taken care
+of internally in <tt>tcpip.c</tt>.
+</p>
+
+<p align="right">        
+<font size="-1"><i>
+$Date: 2002/10/19 13:00:03 $
+</i></font>
+</p>        
+        
+
+</td>
+<td width="50">
+&nbsp;
+</td>
+</tr></table>
+
+<table width="640" border="0" cellpadding="0"
+cellspacing="0">
+<tr><td align="center">
+
+<hr>
+
+
+
+
+<a href="index.html">Introduction</a>
+
+|
+
+<a href="news.html">News</a>
+
+|
+
+<a href="documentation.html">Documentation</a>
+
+|
+
+<a href="mailinglist.html">Mailing list</a>
+
+|
+
+<a href="changelog.html">Changelog</a>
+
+|
+
+<a href="download.html">Download</a>
+
+|
+
+<a href="links.html">Links</a>
+
+
+
+<hr>
+
+</td></tr><tr>
+<td>
+<div align="right">
+<a href="http://www.sics.se/~adam/">Adam Dunkels</a></div>
+</td>
+</tr>
+</table>
+
+</body>
+</html>

proj/unixsim/apps/fsdata.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __FSDATA_H__
+#define __FSDATA_H__
+
+struct fsdata_file {
+  const struct fsdata_file *next;
+  const char *name;
+  const char *data;
+  const int len;
+};
+
+struct fsdata_file_noconst {
+  struct fsdata_file *next;
+  char *name;
+  char *data;
+  int len;
+};
+
+#endif /* __FSDATA_H__ */

proj/unixsim/apps/httpd.c

@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include "lwip/stats.h"
+
+#include "httpd.h"
+
+#include "lwip/tcp.h"
+
+#include "fs.h"
+
+struct http_state {
+  char *file;
+  u32_t left;
+  u8_t retries;
+};
+
+/*-----------------------------------------------------------------------------------*/
+static void
+conn_err(void *arg, err_t err)
+{
+  struct http_state *hs;
+
+  hs = arg;
+  mem_free(hs);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+close_conn(struct tcp_pcb *pcb, struct http_state *hs)
+{
+  tcp_arg(pcb, NULL);
+  tcp_sent(pcb, NULL);
+  tcp_recv(pcb, NULL);
+  mem_free(hs);
+  tcp_close(pcb);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+send_data(struct tcp_pcb *pcb, struct http_state *hs)
+{
+  err_t err;
+  u16_t len;
+
+  /* We cannot send more data than space avaliable in the send
+     buffer. */     
+  if(tcp_sndbuf(pcb) < hs->left) {
+    len = tcp_sndbuf(pcb);
+  } else {
+    len = hs->left;
+  }
+
+  do {
+    err = tcp_write(pcb, hs->file, len, 0);
+    if(err == ERR_MEM) {
+      len /= 2;
+    }
+  } while(err == ERR_MEM && len > 1);  
+  
+  if(err == ERR_OK) {
+    hs->file += len;
+    hs->left -= len;
+    /*  } else {
+	printf("send_data: error %s len %d %d\n", lwip_strerr(err), len, tcp_sndbuf(pcb));*/
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_poll(void *arg, struct tcp_pcb *pcb)
+{
+  struct http_state *hs;
+
+  hs = arg;
+  
+  /*  printf("Polll\n");*/
+  if(hs == NULL) {
+    /*    printf("Null, close\n");*/
+    tcp_abort(pcb);
+    return ERR_ABRT;
+  } else {
+    ++hs->retries;
+    if(hs->retries == 4) {
+      tcp_abort(pcb);
+      return ERR_ABRT;
+    }
+    send_data(pcb, hs);
+  }
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_sent(void *arg, struct tcp_pcb *pcb, u16_t len)
+{
+  struct http_state *hs;
+
+  hs = arg;
+
+  hs->retries = 0;
+  
+  if(hs->left > 0) {    
+    send_data(pcb, hs);
+  } else {
+    close_conn(pcb, hs);
+  }
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+  int i;
+  char *data;
+  struct fs_file file;
+  struct http_state *hs;
+
+  hs = arg;
+
+  if(err == ERR_OK && p != NULL) {
+
+    /* Inform TCP that we have taken the data. */
+    tcp_recved(pcb, p->tot_len);
+    
+    if(hs->file == NULL) {
+      data = p->payload;
+      
+      if(strncmp(data, "GET ", 4) == 0) {
+	for(i = 0; i < 40; i++) {
+	  if(((char *)data + 4)[i] == ' ' ||
+	     ((char *)data + 4)[i] == '\r' ||
+	     ((char *)data + 4)[i] == '\n') {
+	    ((char *)data + 4)[i] = 0;
+	  }
+	}
+
+	if(*(char *)(data + 4) == '/' &&
+	   *(char *)(data + 5) == 0) {
+	  fs_open("/index.html", &file);
+	} else if(!fs_open((char *)data + 4, &file)) {
+	  fs_open("/404.html", &file);	 
+	}
+	hs->file = file.data;
+	hs->left = file.len;
+	/*	printf("data %p len %ld\n", hs->file, hs->left);*/
+
+	pbuf_free(p);
+	send_data(pcb, hs);
+
+	/* Tell TCP that we wish be to informed of data that has been
+	   successfully sent by a call to the http_sent() function. */
+	tcp_sent(pcb, http_sent);
+      } else {
+	pbuf_free(p);
+	close_conn(pcb, hs);
+      }
+    } else {
+      pbuf_free(p);
+    }
+  }
+
+  if(err == ERR_OK && p == NULL) {
+    close_conn(pcb, hs);
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_accept(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+  struct http_state *hs;
+
+  tcp_setprio(pcb, TCP_PRIO_MIN);
+  
+  /* Allocate memory for the structure that holds the state of the
+     connection. */
+  hs = mem_malloc(sizeof(struct http_state));
+
+  if(hs == NULL) {
+    printf("http_accept: Out of memory\n");
+    return ERR_MEM;
+  }
+  
+  /* Initialize the structure. */
+  hs->file = NULL;
+  hs->left = 0;
+  hs->retries = 0;
+  
+  /* Tell TCP that this is the structure we wish to be passed for our
+     callbacks. */
+  tcp_arg(pcb, hs);
+
+  /* Tell TCP that we wish to be informed of incoming data by a call
+     to the http_recv() function. */
+  tcp_recv(pcb, http_recv);
+
+  tcp_err(pcb, conn_err);
+  
+  tcp_poll(pcb, http_poll, 4);
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+httpd_init(void)
+{
+  struct tcp_pcb *pcb;
+
+  pcb = tcp_new();
+  tcp_bind(pcb, IP_ADDR_ANY, 80);
+  pcb = tcp_listen(pcb);
+  tcp_accept(pcb, http_accept);
+}
+/*-----------------------------------------------------------------------------------*/
+

proj/unixsim/apps/httpd.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __HTTPD_H__
+#define __HTTPD_H__
+
+void httpd_init(void);
+
+#endif /* __HTTPD_H__ */

proj/unixsim/apps/makefsdata

@@ -0,0 +1,97 @@
+#!/usr/bin/perl
+
+open(OUTPUT, "> fsdata.c");
+
+chdir("fs");
+open(FILES, "find . -type f |");
+
+while($file = <FILES>) {
+
+    # Do not include files in CVS directories nor backup files.
+    if($file =~ /(CVS|~)/) {
+    	next;
+    }
+    
+    chop($file);
+    
+    open(HEADER, "> /tmp/header") || die $!;
+    if($file =~ /404/) {
+	print(HEADER "HTTP/1.0 404 File not found\r\n");
+    } else {
+	print(HEADER "HTTP/1.0 200 OK\r\n");
+    }
+    print(HEADER "Server: lwIP/pre-0.6 (http://www.sics.se/~adam/lwip/)\r\n");
+    if($file =~ /\.html$/) {
+	print(HEADER "Content-type: text/html\r\n");
+    } elsif($file =~ /\.gif$/) {
+	print(HEADER "Content-type: image/gif\r\n");
+    } elsif($file =~ /\.png$/) {
+	print(HEADER "Content-type: image/png\r\n");
+    } elsif($file =~ /\.jpg$/) {
+	print(HEADER "Content-type: image/jpeg\r\n");
+    } elsif($file =~ /\.class$/) {
+	print(HEADER "Content-type: application/octet-stream\r\n");
+    } elsif($file =~ /\.ram$/) {
+	print(HEADER "Content-type: audio/x-pn-realaudio\r\n");    
+    } else {
+	print(HEADER "Content-type: text/plain\r\n");
+    }
+    print(HEADER "\r\n");
+    close(HEADER);
+
+    unless($file =~ /\.plain$/ || $file =~ /cgi/) {
+	system("cat /tmp/header $file > /tmp/file");
+    } else {
+	system("cp $file /tmp/file");
+    }
+    
+    open(FILE, "/tmp/file");
+    unlink("/tmp/file");
+    unlink("/tmp/header");
+
+    $file =~ s/\.//;
+    $fvar = $file;
+    $fvar =~ s-/-_-g;
+    $fvar =~ s-\.-_-g;
+    print(OUTPUT "static const char data".$fvar."[] = {\n");
+    print(OUTPUT "\t/* $file */\n\t");
+    for($j = 0; $j < length($file); $j++) {
+	printf(OUTPUT "%#02x, ", unpack("C", substr($file, $j, 1)));
+    }
+    printf(OUTPUT "0,\n");
+    
+    
+    $i = 0;        
+    while(read(FILE, $data, 1)) {
+        if($i == 0) {
+            print(OUTPUT "\t");
+        }
+        printf(OUTPUT "%#02x, ", unpack("C", $data));
+        $i++;
+        if($i == 10) {
+            print(OUTPUT "\n");
+            $i = 0;
+        }
+    }
+    print(OUTPUT "};\n\n");
+    close(FILE);
+    push(@fvars, $fvar);
+    push(@files, $file);
+}
+
+for($i = 0; $i < @fvars; $i++) {
+    $file = $files[$i];
+    $fvar = $fvars[$i];
+
+    if($i == 0) {
+        $prevfile = "NULL";
+    } else {
+        $prevfile = "file" . $fvars[$i - 1];
+    }
+    print(OUTPUT "const struct fsdata_file file".$fvar."[] = {{$prevfile, data$fvar, ");
+    print(OUTPUT "data$fvar + ". (length($file) + 1) .", ");
+    print(OUTPUT "sizeof(data$fvar) - ". (length($file) + 1) ."}};\n\n");
+}
+
+print(OUTPUT "#define FS_ROOT file$fvars[$i - 1]\n\n");
+print(OUTPUT "#define FS_NUMFILES $i");

proj/unixsim/apps/shell.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __SHELL_H__
+#define __SHELL_H__
+
+void shell_init(void);
+
+#endif /* __SHELL_H__ */

proj/unixsim/apps/tcpecho.c

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/sys.h"
+#include "lwip/api.h"
+/*-----------------------------------------------------------------------------------*/
+static void 
+tcpecho_thread(void *arg)
+{
+  struct netconn *conn, *newconn;
+  err_t err;
+
+  /* Create a new connection identifier. */
+  conn = netconn_new(NETCONN_TCP);
+
+  /* Bind connection to well known port number 7. */
+  netconn_bind(conn, NULL, 7);
+
+  /* Tell connection to go into listening mode. */
+  netconn_listen(conn);
+
+  while(1) {
+
+    /* Grab new connection. */
+    newconn = netconn_accept(conn);
+    /*printf("accepted new connection %p\n", newconn);*/
+    /* Process the new connection. */
+    if(newconn != NULL) {
+      struct netbuf *buf;
+      void *data;
+      u16_t len;
+      
+      while((buf = netconn_recv(newconn)) != NULL) {
+	/*printf("Recved\n");*/
+	do {
+	  netbuf_data(buf, &data, &len);
+	  err = netconn_write(newconn, data, len, NETCONN_COPY);
+	  if(err != ERR_OK) {
+	    /*	    printf("tcpecho: netconn_write: error \"%s\"\n", lwip_strerr(err));*/
+	  }
+	} while(netbuf_next(buf) >= 0);
+	netbuf_delete(buf);	
+      }
+      /*printf("Got EOF, looping\n");*/
+      /* Close connection and discard connection identifier. */
+      netconn_delete(newconn);
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+void
+tcpecho_init(void)
+{
+  sys_thread_new(tcpecho_thread, NULL);  
+}
+/*-----------------------------------------------------------------------------------*/
+
+
+

proj/unixsim/apps/tcpecho.h

@@ -1,14 +1,8 @@
-/**
- * @file
- * Functions common to all TCP/IPv4 modules, such as the byte order functions.
- *
- */
-
 /*
- * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
  * are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice,
@@ -17,26 +11,28 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
+ *    derived from this software without specific prior written permission. 
  *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
  * OF SUCH DAMAGE.
  *
  * This file is part of the lwIP TCP/IP stack.
- *
+ * 
  * Author: Adam Dunkels <adam@sics.se>
  *
  */
 
-#include "lwip/opt.h"
+#ifndef __TCPECHO_H__
+#define __TCPECHO_H__
 
-#include "lwip/inet.h"
+void tcpecho_init(void);
 
+#endif /* __TCPECHO_H__ */

proj/unixsim/apps/udpecho.c

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/api.h"
+#include "lwip/sys.h"
+
+/*-----------------------------------------------------------------------------------*/
+void 
+udpecho_thread(void *arg)
+{
+  static struct netconn *conn;
+  static struct netbuf *buf;
+  static struct ip_addr *addr;
+  static unsigned short port;
+  char buffer[4096];
+  
+  conn = netconn_new(NETCONN_UDP);
+  netconn_bind(conn, NULL, 7);
+
+  while(1) {
+    buf = netconn_recv(conn);
+    addr = netbuf_fromaddr(buf);
+    port = netbuf_fromport(buf);
+    netconn_connect(conn, addr, port);
+    netconn_send(conn, buf);
+    netbuf_copy(buf, buffer, sizeof(buffer));
+    printf("got %s\n", buffer);
+    netbuf_delete(buf);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+void
+udpecho_init(void)
+{
+  sys_thread_new(udpecho_thread, NULL);
+}

proj/unixsim/apps/udpecho.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __UDPECHO_H__
+#define __UDPECHO_H__
+
+void udpecho_init(void);
+
+#endif /* __UDPECHO_H__ */

proj/unixsim/lwipopts.h

@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIPOPTS_H__
+#define __LWIPOPTS_H__
+
+/* ---------- Memory options ---------- */
+/* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
+   lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
+   byte alignment -> define MEM_ALIGNMENT to 2. */
+#define MEM_ALIGNMENT           1
+
+/* MEM_SIZE: the size of the heap memory. If the application will send
+a lot of data that needs to be copied, this should be set high. */
+#define MEM_SIZE                1600
+
+/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
+   sends a lot of data out of ROM (or other static memory), this
+   should be set high. */
+#define MEMP_NUM_PBUF           16
+/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
+   per active UDP "connection". */
+#define MEMP_NUM_UDP_PCB        4
+/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
+   connections. */
+#define MEMP_NUM_TCP_PCB        5
+/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
+   connections. */
+#define MEMP_NUM_TCP_PCB_LISTEN 8
+/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
+   segments. */
+#define MEMP_NUM_TCP_SEG        16
+/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
+   timeouts. */
+#define MEMP_NUM_SYS_TIMEOUT    3
+
+
+/* The following four are used only with the sequential API and can be
+   set to 0 if the application only will use the raw API. */
+/* MEMP_NUM_NETBUF: the number of struct netbufs. */
+#define MEMP_NUM_NETBUF         2
+/* MEMP_NUM_NETCONN: the number of struct netconns. */
+#define MEMP_NUM_NETCONN        4
+/* MEMP_NUM_APIMSG: the number of struct api_msg, used for
+   communication between the TCP/IP stack and the sequential
+   programs. */
+#define MEMP_NUM_API_MSG        8
+/* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
+   for sequential API communication and incoming packets. Used in
+   src/api/tcpip.c. */
+#define MEMP_NUM_TCPIP_MSG      8
+
+/* These two control is reclaimer functions should be compiled
+   in. Should always be turned on (1). */
+#define MEM_RECLAIM             1
+#define MEMP_RECLAIM            1
+
+/* ---------- Pbuf options ---------- */
+/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
+#define PBUF_POOL_SIZE          6
+
+/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
+#define PBUF_POOL_BUFSIZE       128
+
+/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
+   link level header. */
+#define PBUF_LINK_HLEN          16
+
+/* ---------- TCP options ---------- */
+#define LWIP_TCP                1
+#define TCP_TTL                 255
+
+/* Controls if TCP should queue segments that arrive out of
+   order. Define to 0 if your device is low on memory. */
+#define TCP_QUEUE_OOSEQ         1
+
+/* TCP Maximum segment size. */
+#define TCP_MSS                 128
+
+/* TCP sender buffer space (bytes). */
+#define TCP_SND_BUF             256
+
+/* TCP sender buffer space (pbufs). This must be at least = 2 *
+   TCP_SND_BUF/TCP_MSS for things to work. */
+#define TCP_SND_QUEUELEN        4 * TCP_SND_BUF/TCP_MSS
+
+/* TCP receive window. */
+#define TCP_WND                 1024
+
+/* Maximum number of retransmissions of data segments. */
+#define TCP_MAXRTX              12
+
+/* Maximum number of retransmissions of SYN segments. */
+#define TCP_SYNMAXRTX           4
+
+/* ---------- ARP options ---------- */
+#define ARP_TABLE_SIZE 10
+
+/* ---------- IP options ---------- */
+/* Define IP_FORWARD to 1 if you wish to have the ability to forward
+   IP packets across network interfaces. If you are going to run lwIP
+   on a device with only one network interface, define this to 0. */
+#define IP_FORWARD              1
+
+/* If defined to 1, IP options are allowed (but not parsed). If
+   defined to 0, all packets with IP options are dropped. */
+#define IP_OPTIONS              1
+
+/* ---------- ICMP options ---------- */
+#define ICMP_TTL                255
+
+
+/* ---------- DHCP options ---------- */
+/* Define LWIP_DHCP to 1 if you want DHCP configuration of
+   interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
+   turning this on does currently not work. */
+#define LWIP_DHCP               0
+
+/* 1 if you want to do an ARP check on the offered address
+   (recommended). */
+#define DHCP_DOES_ARP_CHECK     1
+
+/* ---------- UDP options ---------- */
+#define LWIP_UDP                1
+#define UDP_TTL                 255
+
+
+/* ---------- Statistics options ---------- */
+#define STATS
+
+#ifdef STATS
+#define LINK_STATS
+#define IP_STATS
+#define ICMP_STATS
+#define UDP_STATS
+#define TCP_STATS
+#define MEM_STATS
+#define MEMP_STATS
+#define PBUF_STATS
+#define SYS_STATS
+#endif /* STATS */
+
+#endif /* __LWIPOPTS_H__ */

proj/unixsim/simhost.c

@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include <unistd.h>
+
+#include "lwip/opt.h"
+
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/sys.h"
+
+#include "lwip/stats.h"
+
+
+#include "lwip/tcpip.h"
+
+#include "netif/tapif.h"
+#include "netif/tunif.h"
+
+#include "netif/unixif.h"
+#include "netif/dropif.h"
+#include "netif/pcapif.h"
+#include "netif/loopif.h"
+
+#include "netif/tcpdump.h"
+
+
+
+
+#include "lwip/ip_addr.h"
+
+#include "arch/perf.h"
+
+#include "httpd.h"
+#include "udpecho.h"
+#include "tcpecho.h"
+#include "shell.h"
+
+/*-----------------------------------------------------------------------------------*/
+static void
+tcp_timeout(void *data)
+{
+#if TCP_DEBUG
+  tcp_debug_print_pcbs();
+#endif /* TCP_DEBUG */
+  sys_timeout(5000, tcp_timeout, NULL);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+tcpip_init_done(void *arg)
+{
+  sys_sem_t *sem;
+  sem = arg;
+  sys_sem_signal(*sem);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+main_thread(void *arg)
+{
+  struct ip_addr ipaddr, netmask, gw;
+  sys_sem_t sem;
+
+  netif_init();
+
+  sem = sys_sem_new(0);
+  tcpip_init(tcpip_init_done, &sem);
+  sys_sem_wait(sem);
+  sys_sem_free(sem);
+  printf("TCP/IP initialized.\n");
+  
+#if LWIP_DHCP
+  {
+    struct netif *netif;
+    IP4_ADDR(&gw, 0,0,0,0);
+    IP4_ADDR(&ipaddr, 0,0,0,0);
+    IP4_ADDR(&netmask, 0,0,0,0);
+
+    netif = netif_add(&ipaddr, &netmask, &gw, tapif_init,
+		      tcpip_input);
+    netif_set_default(netif);
+    dhcp_init();
+    dhcp_start(netif);
+  }
+#else
+  IP4_ADDR(&gw, 192,168,0,1);
+  IP4_ADDR(&ipaddr, 192,168,0,2);
+  IP4_ADDR(&netmask, 255,255,255,0);
+  
+  /*  netif_set_default(netif_add(&ipaddr, &netmask, &gw, tapif_init,
+      tcpip_input));*/
+  netif_set_default(netif_add(&ipaddr, &netmask, &gw, tapif_init,
+			      tcpip_input));
+#endif
+  /* Only used for testing purposes: */
+  /*  IP4_ADDR(&gw, 193,10,66,1);
+  IP4_ADDR(&ipaddr, 193,10,66,107);
+  IP4_ADDR(&netmask, 255,255,252,0);
+  
+  netif_add(&ipaddr, &netmask, &gw, pcapif_init,
+  tcpip_input);*/
+  
+  IP4_ADDR(&gw, 127,0,0,1);
+  IP4_ADDR(&ipaddr, 127,0,0,1);
+  IP4_ADDR(&netmask, 255,0,0,0);
+  
+  netif_add(&ipaddr, &netmask, &gw, loopif_init,
+	    tcpip_input);
+   
+  tcpecho_init();
+  shell_init();
+  httpd_init();
+  udpecho_init();
+  
+  printf("Applications started.\n");
+
+  /*  sys_timeout(5000, tcp_timeout, NULL);*/
+
+#ifdef MEM_PERF
+  mem_perf_init("/tmp/memstats.client");
+#endif /* MEM_PERF */
+
+  /* Block for ever. */
+  sem = sys_sem_new(0);
+  sys_sem_wait(sem);
+}
+/*-----------------------------------------------------------------------------------*/
+int
+main(int argc, char **argv)
+{
+#ifdef PERF
+  perf_init("/tmp/simhost.perf");
+#endif /* PERF */
+#ifdef STATS
+  stats_init();
+#endif /* STATS */
+  sys_init();
+  mem_init();
+  memp_init();
+  pbuf_init();
+
+  tcpdump_init();
+
+  
+  printf("System initialized.\n");
+    
+  sys_thread_new((void *)(main_thread), NULL);
+  pause();
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+
+
+
+
+
+
+
+

proj/unixsim/simnode.c

@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include <unistd.h>
+
+
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/sys.h"
+
+#include "lwip/stats.h"
+
+
+#include "lwip/tcpip.h"
+
+
+#include "netif/unixif.h"
+#include "netif/dropif.h"
+
+#include "netif/loopif.h"
+
+#include "netif/tcpdump.h"
+
+#include "netif/sioslipif.h"
+
+
+#include "lwip/ip_addr.h"
+
+#include "arch/perf.h"
+
+#include "httpd.h"
+#include "udpecho.h"
+#include "tcpecho.h"
+#include "shell.h"
+
+/*-----------------------------------------------------------------------------------*/
+static void
+tcp_timeout(void *data)
+{
+#if TCP_DEBUG
+  tcp_debug_print_pcbs();
+#endif /* TCP_DEBUG */
+  sys_timeout(5000, tcp_timeout, NULL);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+tcpip_init_done(void *arg)
+{
+  sys_sem_t *sem;
+  sem = arg;
+  sys_sem_signal(*sem);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+main_thread(void *arg)
+{
+  struct ip_addr ipaddr, netmask, gw;
+  sys_sem_t sem;
+
+    
+  IP4_ADDR(&gw, 192,168,1,1);
+  IP4_ADDR(&ipaddr, 192,168,1,2);
+  IP4_ADDR(&netmask, 255,255,255,0);
+
+  netif_set_default(netif_add(&ipaddr, &netmask, &gw, unixif_init_client,
+			      tcpip_input));
+  /*  netif_set_default(netif_add(&ipaddr, &netmask, &gw, sioslipif_init1,
+			      tcpip_input)); */
+
+  
+  sem = sys_sem_new(0);
+  tcpip_init(tcpip_init_done, &sem);
+  sys_sem_wait(sem);
+  sys_sem_free(sem);
+  printf("TCP/IP initialized.\n");
+
+  tcpecho_init();
+  shell_init();
+  httpd_init();
+  udpecho_init();
+
+  printf("Applications started.\n");
+    
+  sys_timeout(5000, tcp_timeout, NULL);
+
+#ifdef MEM_PERF
+  mem_perf_init("/tmp/memstats.client");
+#endif /* MEM_PERF */
+
+  sem = sys_sem_new(0);
+  sys_sem_wait(sem);
+
+}
+/*-----------------------------------------------------------------------------------*/
+int
+main(int argc, char **argv)
+{
+#ifdef PERF
+  perf_init("/tmp/client.perf");
+#endif /* PERF */
+#ifdef STATS
+  stats_init();
+#endif /* STATS */
+  sys_init();
+  mem_init();
+  memp_init();
+  pbuf_init();
+
+  tcpdump_init();
+
+  
+  printf("System initialized.\n");
+    
+  sys_thread_new((void *)(main_thread), NULL);
+  pause();
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+
+
+
+
+
+
+
+

proj/unixsim/simrouter.c

@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include <unistd.h>
+
+
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/sys.h"
+
+#include "lwip/stats.h"
+
+
+#include "lwip/tcpip.h"
+
+#include "netif/tapif.h"
+
+#include "netif/unixif.h"
+#include "netif/dropif.h"
+
+#include "netif/loopif.h"
+
+#include "netif/tcpdump.h"
+
+#include "netif/sioslipif.h"
+
+
+#include "lwip/ip_addr.h"
+
+#include "arch/perf.h"
+
+#include "httpd.h"
+#include "udpecho.h"
+#include "tcpecho.h"
+#include "shell.h"
+
+/*-----------------------------------------------------------------------------------*/
+static void
+tcp_timeout(void *data)
+{
+#if TCP_DEBUG
+  tcp_debug_print_pcbs();
+#endif /* TCP_DEBUG */
+  sys_timeout(5000, tcp_timeout, NULL);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+tcpip_init_done(void *arg)
+{
+  sys_sem_t *sem;
+  sem = arg;
+  sys_sem_signal(*sem);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+main_thread(void *arg)
+{
+  struct ip_addr ipaddr, netmask, gw;
+  sys_sem_t sem;
+
+    
+  IP4_ADDR(&gw, 192,168,0,1);
+  IP4_ADDR(&ipaddr, 192,168,0,2);
+  IP4_ADDR(&netmask, 255,255,255,0);
+
+  netif_set_default(netif_add(&ipaddr, &netmask, &gw, tapif_init,
+			      tcpip_input));
+
+  IP4_ADDR(&gw, 192,168,1,1);
+  IP4_ADDR(&ipaddr, 192,168,1,1);
+  IP4_ADDR(&netmask, 255,255,255,0);
+  netif_set_default(netif_add(&ipaddr, &netmask, &gw, unixif_init_server,
+			      tcpip_input));
+
+  system("route add 192.168.1.1 192.168.0.2");
+  system("route add 192.168.1.2 192.168.0.2");
+
+  
+  /*netif_set_default(netif_add(&ipaddr, &netmask, &gw, sioslipif_init1,
+			      tcpip_input)); */
+
+  
+  sem = sys_sem_new(0);
+  tcpip_init(tcpip_init_done, &sem);
+  sys_sem_wait(sem);
+  sys_sem_free(sem);
+  printf("TCP/IP initialized.\n");
+
+  tcpecho_init();
+  shell_init();
+  httpd_init();
+  udpecho_init();
+
+  printf("Applications started.\n");
+    
+  sys_timeout(5000, tcp_timeout, NULL);
+
+#ifdef MEM_PERF
+  mem_perf_init("/tmp/memstats.client");
+#endif /* MEM_PERF */
+  sem = sys_sem_new(0);
+  sys_sem_wait(sem);
+}
+/*-----------------------------------------------------------------------------------*/
+int
+main(int argc, char **argv)
+{
+#ifdef PERF
+  perf_init("/tmp/client.perf");
+#endif /* PERF */
+#ifdef STATS
+  stats_init();
+#endif /* STATS */
+  sys_init();
+  mem_init();
+  memp_init();
+  pbuf_init();
+
+  tcpdump_init();
+
+  
+  printf("System initialized.\n");
+    
+  sys_thread_new((void *)(main_thread), NULL);
+  pause();
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+
+
+
+
+
+
+
+

src/FILES

@@ -1,13 +1,13 @@
-api/      - The code for the high-level wrapper API. Not needed if
-            you use the lowel-level call-back/raw API.
+api/      - The code for the API.	   
 
-core/     - The core of the TPC/IP stack; protocol implementations,
-            memory and buffer management, and the low-level raw API.
+arch/     - Architectural specific files are kept here.
 
+core/     - The core files including protocol implementations, memory
+            and buffer management etc.
+	    
 include/  - lwIP include files.
 
-netif/    - Generic network interface device drivers are kept here,
-            as well as the ARP module.
+netif/    - Generic network interface device drivers are kept here.
 
 For more information on the various subdirectories, check the FILES
 file in each directory.

src/api/err.c

@@ -1,11 +1,5 @@
-/**
- * @file
- * Error Management module
- *
- */
-
 /*
- * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
@@ -40,36 +34,26 @@
 
 #ifdef LWIP_DEBUG
 
-static const char *err_strerr[] = {
-           "Ok.",                    /* ERR_OK          0  */
-           "Out of memory error.",   /* ERR_MEM        -1  */
-           "Buffer error.",          /* ERR_BUF        -2  */
-           "Timeout.",               /* ERR_TIMEOUT    -3  */
-           "Routing problem.",       /* ERR_RTE        -4  */
-           "Operation in progress.", /* ERR_INPROGRESS -5  */
-           "Illegal value.",         /* ERR_VAL        -6  */
-           "Operation would block.", /* ERR_WOULDBLOCK -7  */
-           "Connection aborted.",    /* ERR_ABRT       -8  */
-           "Connection reset.",      /* ERR_RST        -9  */
-           "Connection closed.",     /* ERR_CLSD       -10 */
-           "Not connected.",         /* ERR_CONN       -11 */
-           "Illegal argument.",      /* ERR_ARG        -12 */
-           "Address in use.",        /* ERR_USE        -13 */
-           "Low-level netif error.", /* ERR_IF         -14 */
-           "Already connected.",     /* ERR_ISCONN     -15 */
+static char *err_strerr[] = {"Ok.",
+			     "Out of memory error.",
+			     "Buffer error.",
+			     "Connection aborted.",
+			     "Connection reset.",
+			     "Connection closed.",
+			     "Not connected.",
+			     "Illegal value.",
+			     "Illegal argument.",
+			     "Routing problem.",
+			     "Address in use."
 };
 
-/**
- * Convert an lwip internal error to a string representation.
- *
- * @param err an lwip internal err_t
- * @return a string representation for err
- */
-const char *
+/*-----------------------------------------------------------------------------------*/
+char *
 lwip_strerr(err_t err)
 {
   return err_strerr[-err];
 
 }
+/*-----------------------------------------------------------------------------------*/
 
 #endif /* LWIP_DEBUG */

src/api/netbuf.c

@@ -1,245 +0,0 @@
-/**
- * @file
- * Network buffer management
- *
- */
- 
-/*
- * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
- * All rights reserved. 
- * 
- * Redistribution and use in source and binary forms, with or without modification, 
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
- * OF SUCH DAMAGE.
- *
- * This file is part of the lwIP TCP/IP stack.
- * 
- * Author: Adam Dunkels <adam@sics.se>
- *
- */
-
-#include "lwip/opt.h"
-
-#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
-
-#include "lwip/netbuf.h"
-#include "lwip/memp.h"
-
-#include <string.h>
-
-/**
- * Create (allocate) and initialize a new netbuf.
- * The netbuf doesn't yet contain a packet buffer!
- *
- * @return a pointer to a new netbuf
- *         NULL on lack of memory
- */
-struct
-netbuf *netbuf_new(void)
-{
-  struct netbuf *buf;
-
-  buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
-  if (buf != NULL) {
-    buf->p = NULL;
-    buf->ptr = NULL;
-    ip_addr_set_any(&buf->addr);
-    buf->port = 0;
-#if LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY
-#if LWIP_CHECKSUM_ON_COPY
-    buf->flags = 0;
-#endif /* LWIP_CHECKSUM_ON_COPY */
-    buf->toport_chksum = 0;
-#if LWIP_NETBUF_RECVINFO
-    ip_addr_set_any(&buf->toaddr);
-#endif /* LWIP_NETBUF_RECVINFO */
-#endif /* LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY */
-    return buf;
-  } else {
-    return NULL;
-  }
-}
-
-/**
- * Deallocate a netbuf allocated by netbuf_new().
- *
- * @param buf pointer to a netbuf allocated by netbuf_new()
- */
-void
-netbuf_delete(struct netbuf *buf)
-{
-  if (buf != NULL) {
-    if (buf->p != NULL) {
-      pbuf_free(buf->p);
-      buf->p = buf->ptr = NULL;
-    }
-    memp_free(MEMP_NETBUF, buf);
-  }
-}
-
-/**
- * Allocate memory for a packet buffer for a given netbuf.
- *
- * @param buf the netbuf for which to allocate a packet buffer
- * @param size the size of the packet buffer to allocate
- * @return pointer to the allocated memory
- *         NULL if no memory could be allocated
- */
-void *
-netbuf_alloc(struct netbuf *buf, u16_t size)
-{
-  LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;);
-
-  /* Deallocate any previously allocated memory. */
-  if (buf->p != NULL) {
-    pbuf_free(buf->p);
-  }
-  buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
-  if (buf->p == NULL) {
-     return NULL;
-  }
-  LWIP_ASSERT("check that first pbuf can hold size",
-             (buf->p->len >= size));
-  buf->ptr = buf->p;
-  return buf->p->payload;
-}
-
-/**
- * Free the packet buffer included in a netbuf
- *
- * @param buf pointer to the netbuf which contains the packet buffer to free
- */
-void
-netbuf_free(struct netbuf *buf)
-{
-  LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
-  if (buf->p != NULL) {
-    pbuf_free(buf->p);
-  }
-  buf->p = buf->ptr = NULL;
-}
-
-/**
- * Let a netbuf reference existing (non-volatile) data.
- *
- * @param buf netbuf which should reference the data
- * @param dataptr pointer to the data to reference
- * @param size size of the data
- * @return ERR_OK if data is referenced
- *         ERR_MEM if data couldn't be referenced due to lack of memory
- */
-err_t
-netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size)
-{
-  LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;);
-  if (buf->p != NULL) {
-    pbuf_free(buf->p);
-  }
-  buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
-  if (buf->p == NULL) {
-    buf->ptr = NULL;
-    return ERR_MEM;
-  }
-  buf->p->payload = (void*)dataptr;
-  buf->p->len = buf->p->tot_len = size;
-  buf->ptr = buf->p;
-  return ERR_OK;
-}
-
-/**
- * Chain one netbuf to another (@see pbuf_chain)
- *
- * @param head the first netbuf
- * @param tail netbuf to chain after head, freed by this function, may not be reference after returning
- */
-void
-netbuf_chain(struct netbuf *head, struct netbuf *tail)
-{
-  LWIP_ERROR("netbuf_ref: invalid head", (head != NULL), return;);
-  LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;);
-  pbuf_cat(head->p, tail->p);
-  head->ptr = head->p;
-  memp_free(MEMP_NETBUF, tail);
-}
-
-/**
- * Get the data pointer and length of the data inside a netbuf.
- *
- * @param buf netbuf to get the data from
- * @param dataptr pointer to a void pointer where to store the data pointer
- * @param len pointer to an u16_t where the length of the data is stored
- * @return ERR_OK if the information was retreived,
- *         ERR_BUF on error.
- */
-err_t
-netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
-{
-  LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;);
-  LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;);
-  LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;);
-
-  if (buf->ptr == NULL) {
-    return ERR_BUF;
-  }
-  *dataptr = buf->ptr->payload;
-  *len = buf->ptr->len;
-  return ERR_OK;
-}
-
-/**
- * Move the current data pointer of a packet buffer contained in a netbuf
- * to the next part.
- * The packet buffer itself is not modified.
- *
- * @param buf the netbuf to modify
- * @return -1 if there is no next part
- *         1  if moved to the next part but now there is no next part
- *         0  if moved to the next part and there are still more parts
- */
-s8_t
-netbuf_next(struct netbuf *buf)
-{
-  LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return -1;);
-  if (buf->ptr->next == NULL) {
-    return -1;
-  }
-  buf->ptr = buf->ptr->next;
-  if (buf->ptr->next == NULL) {
-    return 1;
-  }
-  return 0;
-}
-
-/**
- * Move the current data pointer of a packet buffer contained in a netbuf
- * to the beginning of the packet.
- * The packet buffer itself is not modified.
- *
- * @param buf the netbuf to modify
- */
-void
-netbuf_first(struct netbuf *buf)
-{
-  LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
-  buf->ptr = buf->p;
-}
-
-#endif /* LWIP_NETCONN */

src/api/netdb.c

@@ -1,352 +0,0 @@
-/**
- * @file
- * API functions for name resolving
- *
- */
-
-/*
- * Redistribution and use in source and binary forms, with or without modification, 
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
- * OF SUCH DAMAGE.
- *
- * This file is part of the lwIP TCP/IP stack.
- * 
- * Author: Simon Goldschmidt
- *
- */
-
-#include "lwip/netdb.h"
-
-#if LWIP_DNS && LWIP_SOCKET
-
-#include "lwip/err.h"
-#include "lwip/mem.h"
-#include "lwip/memp.h"
-#include "lwip/ip_addr.h"
-#include "lwip/api.h"
-#include "lwip/dns.h"
-
-#include <string.h>
-#include <stdlib.h>
-
-/** helper struct for gethostbyname_r to access the char* buffer */
-struct gethostbyname_r_helper {
-  ip_addr_t *addrs;
-  ip_addr_t addr;
-  char *aliases;
-};
-
-/** h_errno is exported in netdb.h for access by applications. */
-#if LWIP_DNS_API_DECLARE_H_ERRNO
-int h_errno;
-#endif /* LWIP_DNS_API_DECLARE_H_ERRNO */
-
-/** define "hostent" variables storage: 0 if we use a static (but unprotected)
- * set of variables for lwip_gethostbyname, 1 if we use a local storage */
-#ifndef LWIP_DNS_API_HOSTENT_STORAGE
-#define LWIP_DNS_API_HOSTENT_STORAGE 0
-#endif
-
-/** define "hostent" variables storage */
-#if LWIP_DNS_API_HOSTENT_STORAGE
-#define HOSTENT_STORAGE
-#else
-#define HOSTENT_STORAGE static
-#endif /* LWIP_DNS_API_STATIC_HOSTENT */
-
-/**
- * Returns an entry containing addresses of address family AF_INET
- * for the host with name name.
- * Due to dns_gethostbyname limitations, only one address is returned.
- *
- * @param name the hostname to resolve
- * @return an entry containing addresses of address family AF_INET
- *         for the host with name name
- */
-struct hostent*
-lwip_gethostbyname(const char *name)
-{
-  err_t err;
-  ip_addr_t addr;
-
-  /* buffer variables for lwip_gethostbyname() */
-  HOSTENT_STORAGE struct hostent s_hostent;
-  HOSTENT_STORAGE char *s_aliases;
-  HOSTENT_STORAGE ip_addr_t s_hostent_addr;
-  HOSTENT_STORAGE ip_addr_t *s_phostent_addr[2];
-
-  /* query host IP address */
-  err = netconn_gethostbyname(name, &addr);
-  if (err != ERR_OK) {
-    LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
-    h_errno = HOST_NOT_FOUND;
-    return NULL;
-  }
-
-  /* fill hostent */
-  s_hostent_addr = addr;
-  s_phostent_addr[0] = &s_hostent_addr;
-  s_phostent_addr[1] = NULL;
-  s_hostent.h_name = (char*)name;
-  s_hostent.h_aliases = &s_aliases;
-  s_hostent.h_addrtype = AF_INET;
-  s_hostent.h_length = sizeof(ip_addr_t);
-  s_hostent.h_addr_list = (char**)&s_phostent_addr;
-
-#if DNS_DEBUG
-  /* dump hostent */
-  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_name           == %s\n", s_hostent.h_name));
-  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases        == %p\n", s_hostent.h_aliases));
-  if (s_hostent.h_aliases != NULL) {
-    u8_t idx;
-    for ( idx=0; s_hostent.h_aliases[idx]; idx++) {
-      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases[%i]->   == %p\n", idx, s_hostent.h_aliases[idx]));
-      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases[%i]->   == %s\n", idx, s_hostent.h_aliases[idx]));
-    }
-  }
-  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addrtype       == %d\n", s_hostent.h_addrtype));
-  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_length         == %d\n", s_hostent.h_length));
-  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list      == %p\n", s_hostent.h_addr_list));
-  if (s_hostent.h_addr_list != NULL) {
-    u8_t idx;
-    for ( idx=0; s_hostent.h_addr_list[idx]; idx++) {
-      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]   == %p\n", idx, s_hostent.h_addr_list[idx]));
-      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]-> == %s\n", idx, ip_ntoa((ip_addr_t*)s_hostent.h_addr_list[idx])));
-    }
-  }
-#endif /* DNS_DEBUG */
-
-#if LWIP_DNS_API_HOSTENT_STORAGE
-  /* this function should return the "per-thread" hostent after copy from s_hostent */
-  return sys_thread_hostent(&s_hostent);
-#else
-  return &s_hostent;
-#endif /* LWIP_DNS_API_HOSTENT_STORAGE */
-}
-
-/**
- * Thread-safe variant of lwip_gethostbyname: instead of using a static
- * buffer, this function takes buffer and errno pointers as arguments
- * and uses these for the result.
- *
- * @param name the hostname to resolve
- * @param ret pre-allocated struct where to store the result
- * @param buf pre-allocated buffer where to store additional data
- * @param buflen the size of buf
- * @param result pointer to a hostent pointer that is set to ret on success
- *               and set to zero on error
- * @param h_errnop pointer to an int where to store errors (instead of modifying
- *                 the global h_errno)
- * @return 0 on success, non-zero on error, additional error information
- *         is stored in *h_errnop instead of h_errno to be thread-safe
- */
-int
-lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
-                size_t buflen, struct hostent **result, int *h_errnop)
-{
-  err_t err;
-  struct gethostbyname_r_helper *h;
-  char *hostname;
-  size_t namelen;
-  int lh_errno;
-
-  if (h_errnop == NULL) {
-    /* ensure h_errnop is never NULL */
-    h_errnop = &lh_errno;
-  }
-
-  if (result == NULL) {
-    /* not all arguments given */
-    *h_errnop = EINVAL;
-    return -1;
-  }
-  /* first thing to do: set *result to nothing */
-  *result = NULL;
-  if ((name == NULL) || (ret == NULL) || (buf == 0)) {
-    /* not all arguments given */
-    *h_errnop = EINVAL;
-    return -1;
-  }
-
-  namelen = strlen(name);
-  if (buflen < (sizeof(struct gethostbyname_r_helper) + namelen + 1 + (MEM_ALIGNMENT - 1))) {
-    /* buf can't hold the data needed + a copy of name */
-    *h_errnop = ERANGE;
-    return -1;
-  }
-
-  h = (struct gethostbyname_r_helper*)LWIP_MEM_ALIGN(buf);
-  hostname = ((char*)h) + sizeof(struct gethostbyname_r_helper);
-
-  /* query host IP address */
-  err = netconn_gethostbyname(name, &(h->addr));
-  if (err != ERR_OK) {
-    LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
-    *h_errnop = ENSRNOTFOUND;
-    return -1;
-  }
-
-  /* copy the hostname into buf */
-  MEMCPY(hostname, name, namelen);
-  hostname[namelen] = 0;
-
-  /* fill hostent */
-  h->addrs = &(h->addr);
-  h->aliases = NULL;
-  ret->h_name = (char*)hostname;
-  ret->h_aliases = &(h->aliases);
-  ret->h_addrtype = AF_INET;
-  ret->h_length = sizeof(ip_addr_t);
-  ret->h_addr_list = (char**)&(h->addrs);
-
-  /* set result != NULL */
-  *result = ret;
-
-  /* return success */
-  return 0;
-}
-
-/**
- * Frees one or more addrinfo structures returned by getaddrinfo(), along with
- * any additional storage associated with those structures. If the ai_next field
- * of the structure is not null, the entire list of structures is freed.
- *
- * @param ai struct addrinfo to free
- */
-void
-lwip_freeaddrinfo(struct addrinfo *ai)
-{
-  struct addrinfo *next;
-
-  while (ai != NULL) {
-    next = ai->ai_next;
-    memp_free(MEMP_NETDB, ai);
-    ai = next;
-  }
-}
-
-/**
- * Translates the name of a service location (for example, a host name) and/or
- * a service name and returns a set of socket addresses and associated
- * information to be used in creating a socket with which to address the
- * specified service.
- * Memory for the result is allocated internally and must be freed by calling
- * lwip_freeaddrinfo()!
- *
- * Due to a limitation in dns_gethostbyname, only the first address of a
- * host is returned.
- * Also, service names are not supported (only port numbers)!
- *
- * @param nodename descriptive name or address string of the host
- *                 (may be NULL -> local address)
- * @param servname port number as string of NULL 
- * @param hints structure containing input values that set socktype and protocol
- * @param res pointer to a pointer where to store the result (set to NULL on failure)
- * @return 0 on success, non-zero on failure
- */
-int
-lwip_getaddrinfo(const char *nodename, const char *servname,
-       const struct addrinfo *hints, struct addrinfo **res)
-{
-  err_t err;
-  ip_addr_t addr;
-  struct addrinfo *ai;
-  struct sockaddr_in *sa = NULL;
-  int port_nr = 0;
-  size_t total_size;
-  size_t namelen = 0;
-
-  if (res == NULL) {
-    return EAI_FAIL;
-  }
-  *res = NULL;
-  if ((nodename == NULL) && (servname == NULL)) {
-    return EAI_NONAME;
-  }
-
-  if (servname != NULL) {
-    /* service name specified: convert to port number
-     * @todo?: currently, only ASCII integers (port numbers) are supported! */
-    port_nr = atoi(servname);
-    if ((port_nr <= 0) || (port_nr > 0xffff)) {
-      return EAI_SERVICE;
-    }
-  }
-
-  if (nodename != NULL) {
-    /* service location specified, try to resolve */
-    err = netconn_gethostbyname(nodename, &addr);
-    if (err != ERR_OK) {
-      return EAI_FAIL;
-    }
-  } else {
-    /* service location specified, use loopback address */
-    ip_addr_set_loopback(&addr);
-  }
-
-  total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_in);
-  if (nodename != NULL) {
-    namelen = strlen(nodename);
-    LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1);
-    total_size += namelen + 1;
-  }
-  /* If this fails, please report to lwip-devel! :-) */
-  LWIP_ASSERT("total_size <= NETDB_ELEM_SIZE: please report this!",
-    total_size <= NETDB_ELEM_SIZE);
-  ai = (struct addrinfo *)memp_malloc(MEMP_NETDB);
-  if (ai == NULL) {
-    goto memerr;
-  }
-  memset(ai, 0, total_size);
-  sa = (struct sockaddr_in*)((u8_t*)ai + sizeof(struct addrinfo));
-  /* set up sockaddr */
-  inet_addr_from_ipaddr(&sa->sin_addr, &addr);
-  sa->sin_family = AF_INET;
-  sa->sin_len = sizeof(struct sockaddr_in);
-  sa->sin_port = htons((u16_t)port_nr);
-
-  /* set up addrinfo */
-  ai->ai_family = AF_INET;
-  if (hints != NULL) {
-    /* copy socktype & protocol from hints if specified */
-    ai->ai_socktype = hints->ai_socktype;
-    ai->ai_protocol = hints->ai_protocol;
-  }
-  if (nodename != NULL) {
-    /* copy nodename to canonname if specified */
-    ai->ai_canonname = ((char*)ai + sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
-    MEMCPY(ai->ai_canonname, nodename, namelen);
-    ai->ai_canonname[namelen] = 0;
-  }
-  ai->ai_addrlen = sizeof(struct sockaddr_in);
-  ai->ai_addr = (struct sockaddr*)sa;
-
-  *res = ai;
-
-  return 0;
-memerr:
-  if (ai != NULL) {
-    memp_free(MEMP_NETDB, ai);
-  }
-  return EAI_MEMORY;
-}
-
-#endif /* LWIP_DNS && LWIP_SOCKET */

src/api/netifapi.c

@@ -1,160 +0,0 @@
-/**
- * @file
- * Network Interface Sequential API module
- *
- */
-
-/*
- * Redistribution and use in source and binary forms, with or without modification, 
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
- * OF SUCH DAMAGE.
- *
- * This file is part of the lwIP TCP/IP stack.
- * 
- */
-
-#include "lwip/opt.h"
-
-#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
-
-#include "lwip/netifapi.h"
-#include "lwip/tcpip.h"
-
-/**
- * Call netif_add() inside the tcpip_thread context.
- */
-void
-do_netifapi_netif_add(struct netifapi_msg_msg *msg)
-{
-  if (!netif_add( msg->netif,
-                  msg->msg.add.ipaddr,
-                  msg->msg.add.netmask,
-                  msg->msg.add.gw,
-                  msg->msg.add.state,
-                  msg->msg.add.init,
-                  msg->msg.add.input)) {
-    msg->err = ERR_IF;
-  } else {
-    msg->err = ERR_OK;
-  }
-  TCPIP_NETIFAPI_ACK(msg);
-}
-
-/**
- * Call netif_set_addr() inside the tcpip_thread context.
- */
-void
-do_netifapi_netif_set_addr(struct netifapi_msg_msg *msg)
-{
-  netif_set_addr( msg->netif,
-                  msg->msg.add.ipaddr,
-                  msg->msg.add.netmask,
-                  msg->msg.add.gw);
-  msg->err = ERR_OK;
-  TCPIP_NETIFAPI_ACK(msg);
-}
-
-/**
- * Call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) inside the
- * tcpip_thread context.
- */
-void
-do_netifapi_netif_common(struct netifapi_msg_msg *msg)
-{
-  if (msg->msg.common.errtfunc != NULL) {
-    msg->err = msg->msg.common.errtfunc(msg->netif);
-  } else {
-    msg->err = ERR_OK;
-    msg->msg.common.voidfunc(msg->netif);
-  }
-  TCPIP_NETIFAPI_ACK(msg);
-}
-
-/**
- * Call netif_add() in a thread-safe way by running that function inside the
- * tcpip_thread context.
- *
- * @note for params @see netif_add()
- */
-err_t
-netifapi_netif_add(struct netif *netif,
-                   ip_addr_t *ipaddr,
-                   ip_addr_t *netmask,
-                   ip_addr_t *gw,
-                   void *state,
-                   netif_init_fn init,
-                   netif_input_fn input)
-{
-  struct netifapi_msg msg;
-  msg.function = do_netifapi_netif_add;
-  msg.msg.netif = netif;
-  msg.msg.msg.add.ipaddr  = ipaddr;
-  msg.msg.msg.add.netmask = netmask;
-  msg.msg.msg.add.gw      = gw;
-  msg.msg.msg.add.state   = state;
-  msg.msg.msg.add.init    = init;
-  msg.msg.msg.add.input   = input;
-  TCPIP_NETIFAPI(&msg);
-  return msg.msg.err;
-}
-
-/**
- * Call netif_set_addr() in a thread-safe way by running that function inside the
- * tcpip_thread context.
- *
- * @note for params @see netif_set_addr()
- */
-err_t
-netifapi_netif_set_addr(struct netif *netif,
-                        ip_addr_t *ipaddr,
-                        ip_addr_t *netmask,
-                        ip_addr_t *gw)
-{
-  struct netifapi_msg msg;
-  msg.function = do_netifapi_netif_set_addr;
-  msg.msg.netif = netif;
-  msg.msg.msg.add.ipaddr  = ipaddr;
-  msg.msg.msg.add.netmask = netmask;
-  msg.msg.msg.add.gw      = gw;
-  TCPIP_NETIFAPI(&msg);
-  return msg.msg.err;
-}
-
-/**
- * call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) in a thread-safe
- * way by running that function inside the tcpip_thread context.
- *
- * @note use only for functions where there is only "netif" parameter.
- */
-err_t
-netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc,
-                       netifapi_errt_fn errtfunc)
-{
-  struct netifapi_msg msg;
-  msg.function = do_netifapi_netif_common;
-  msg.msg.netif = netif;
-  msg.msg.msg.common.voidfunc = voidfunc;
-  msg.msg.msg.common.errtfunc = errtfunc;
-  TCPIP_NETIFAPI(&msg);
-  return msg.msg.err;
-}
-
-#endif /* LWIP_NETIF_API */

src/api/tcpip.c

@@ -1,14 +1,8 @@
-/**
- * @file
- * Sequential API Main thread module
- *
- */
-
 /*
- * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
  * are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice,
@@ -17,444 +11,127 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
+ *    derived from this software without specific prior written permission. 
  *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
  * OF SUCH DAMAGE.
  *
  * This file is part of the lwIP TCP/IP stack.
- *
+ * 
  * Author: Adam Dunkels <adam@sics.se>
  *
  */
 
+#include "lwip/debug.h"
+
 #include "lwip/opt.h"
 
-#if !NO_SYS /* don't build if not configured for use in lwipopts.h */
-
 #include "lwip/sys.h"
-#include "lwip/memp.h"
-#include "lwip/mem.h"
-#include "lwip/pbuf.h"
-#include "lwip/tcpip.h"
-#include "lwip/init.h"
-#include "netif/etharp.h"
-#include "netif/ppp_oe.h"
 
-/* global variables */
-static tcpip_init_done_fn tcpip_init_done;
+#include "lwip/memp.h"
+#include "lwip/pbuf.h"
+
+#include "lwip/ip.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+
+#include "lwip/tcpip.h"
+
+static void (* tcpip_init_done)(void *arg) = NULL;
 static void *tcpip_init_done_arg;
 static sys_mbox_t mbox;
 
-#if LWIP_TCPIP_CORE_LOCKING
-/** The global semaphore to lock the stack. */
-sys_mutex_t lock_tcpip_core;
-#endif /* LWIP_TCPIP_CORE_LOCKING */
+/*-----------------------------------------------------------------------------------*/
+static void
+tcpip_tcp_timer(void *arg)
+{
+  tcp_tmr();
+  sys_timeout(TCP_TMR_INTERVAL, (sys_timeout_handler)tcpip_tcp_timer, NULL);
+}
+/*-----------------------------------------------------------------------------------*/
 
-
-/**
- * The main lwIP thread. This thread has exclusive access to lwIP core functions
- * (unless access to them is not locked). Other threads communicate with this
- * thread using message boxes.
- *
- * It also starts all the timers to make sure they are running in the right
- * thread context.
- *
- * @param arg unused argument
- */
 static void
 tcpip_thread(void *arg)
 {
   struct tcpip_msg *msg;
-  LWIP_UNUSED_ARG(arg);
 
-  if (tcpip_init_done != NULL) {
+  ip_init();
+  udp_init();
+  tcp_init();
+
+  sys_timeout(TCP_TMR_INTERVAL, (sys_timeout_handler)tcpip_tcp_timer, NULL);
+  
+  if(tcpip_init_done != NULL) {
     tcpip_init_done(tcpip_init_done_arg);
   }
 
-  LOCK_TCPIP_CORE();
-  while (1) {                          /* MAIN Loop */
-    UNLOCK_TCPIP_CORE();
-    LWIP_TCPIP_THREAD_ALIVE();
-    /* wait for a message, timeouts are processed while waiting */
-    sys_timeouts_mbox_fetch(&mbox, (void **)&msg);
-    LOCK_TCPIP_CORE();
-    switch (msg->type) {
-#if LWIP_NETCONN
+  while(1) {                          /* MAIN Loop */
+    sys_mbox_fetch(mbox, (void *)&msg);
+    switch(msg->type) {
     case TCPIP_MSG_API:
-      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
-      msg->msg.apimsg->function(&(msg->msg.apimsg->msg));
+      DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", msg));
+      api_msg_input(msg->msg.apimsg);
       break;
-#endif /* LWIP_NETCONN */
-
-#if !LWIP_TCPIP_CORE_LOCKING_INPUT
-    case TCPIP_MSG_INPKT:
-      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg));
-#if LWIP_ETHERNET
-      if (msg->msg.inp.netif->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
-        ethernet_input(msg->msg.inp.p, msg->msg.inp.netif);
-      } else
-#endif /* LWIP_ETHERNET */
-      {
-        ip_input(msg->msg.inp.p, msg->msg.inp.netif);
-      }
-      memp_free(MEMP_TCPIP_MSG_INPKT, msg);
+    case TCPIP_MSG_INPUT:
+      DEBUGF(TCPIP_DEBUG, ("tcpip_thread: IP packet %p\n", msg));
+      ip_input(msg->msg.inp.p, msg->msg.inp.netif);
       break;
-#endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */
-
-#if LWIP_NETIF_API
-    case TCPIP_MSG_NETIFAPI:
-      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: Netif API message %p\n", (void *)msg));
-      msg->msg.netifapimsg->function(&(msg->msg.netifapimsg->msg));
-      break;
-#endif /* LWIP_NETIF_API */
-
-    case TCPIP_MSG_CALLBACK:
-      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
-      msg->msg.cb.function(msg->msg.cb.ctx);
-      memp_free(MEMP_TCPIP_MSG_API, msg);
-      break;
-
-#if LWIP_TCPIP_TIMEOUT
-    case TCPIP_MSG_TIMEOUT:
-      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg));
-      sys_timeout(msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg);
-      memp_free(MEMP_TCPIP_MSG_API, msg);
-      break;
-    case TCPIP_MSG_UNTIMEOUT:
-      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: UNTIMEOUT %p\n", (void *)msg));
-      sys_untimeout(msg->msg.tmo.h, msg->msg.tmo.arg);
-      memp_free(MEMP_TCPIP_MSG_API, msg);
-      break;
-#endif /* LWIP_TCPIP_TIMEOUT */
-
     default:
-      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: %d\n", msg->type));
-      LWIP_ASSERT("tcpip_thread: invalid message", 0);
       break;
     }
+    memp_freep(MEMP_TCPIP_MSG, msg);
   }
 }
-
-/**
- * Pass a received packet to tcpip_thread for input processing
- *
- * @param p the received packet, p->payload pointing to the Ethernet header or
- *          to an IP header (if inp doesn't have NETIF_FLAG_ETHARP or
- *          NETIF_FLAG_ETHERNET flags)
- * @param inp the network interface on which the packet was received
- */
+/*-----------------------------------------------------------------------------------*/
 err_t
 tcpip_input(struct pbuf *p, struct netif *inp)
 {
-#if LWIP_TCPIP_CORE_LOCKING_INPUT
-  err_t ret;
-  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_input: PACKET %p/%p\n", (void *)p, (void *)inp));
-  LOCK_TCPIP_CORE();
-#if LWIP_ETHERNET
-  if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
-    ret = ethernet_input(p, inp);
-  } else
-#endif /* LWIP_ETHERNET */
-  {
-    ret = ip_input(p, inp);
-  }
-  UNLOCK_TCPIP_CORE();
-  return ret;
-#else /* LWIP_TCPIP_CORE_LOCKING_INPUT */
   struct tcpip_msg *msg;
-
-  if (sys_mbox_valid(&mbox)) {
-    msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_INPKT);
-    if (msg == NULL) {
-      return ERR_MEM;
-    }
-
-    msg->type = TCPIP_MSG_INPKT;
-    msg->msg.inp.p = p;
-    msg->msg.inp.netif = inp;
-    if (sys_mbox_trypost(&mbox, msg) != ERR_OK) {
-      memp_free(MEMP_TCPIP_MSG_INPKT, msg);
-      return ERR_MEM;
-    }
-    return ERR_OK;
+  
+  msg = memp_mallocp(MEMP_TCPIP_MSG);
+  if(msg == NULL) {
+    pbuf_free(p);    
+    return ERR_MEM;  
   }
-  return ERR_VAL;
-#endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */
+  
+  msg->type = TCPIP_MSG_INPUT;
+  msg->msg.inp.p = p;
+  msg->msg.inp.netif = inp;
+  sys_mbox_post(mbox, msg);
+  return ERR_OK;
 }
-
-/**
- * Call a specific function in the thread context of
- * tcpip_thread for easy access synchronization.
- * A function called in that way may access lwIP core code
- * without fearing concurrent access.
- *
- * @param f the function to call
- * @param ctx parameter passed to f
- * @param block 1 to block until the request is posted, 0 to non-blocking mode
- * @return ERR_OK if the function was called, another err_t if not
- */
-err_t
-tcpip_callback_with_block(tcpip_callback_fn function, void *ctx, u8_t block)
-{
-  struct tcpip_msg *msg;
-
-  if (sys_mbox_valid(&mbox)) {
-    msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
-    if (msg == NULL) {
-      return ERR_MEM;
-    }
-
-    msg->type = TCPIP_MSG_CALLBACK;
-    msg->msg.cb.function = function;
-    msg->msg.cb.ctx = ctx;
-    if (block) {
-      sys_mbox_post(&mbox, msg);
-    } else {
-      if (sys_mbox_trypost(&mbox, msg) != ERR_OK) {
-        memp_free(MEMP_TCPIP_MSG_API, msg);
-        return ERR_MEM;
-      }
-    }
-    return ERR_OK;
-  }
-  return ERR_VAL;
-}
-
-#if LWIP_TCPIP_TIMEOUT
-/**
- * call sys_timeout in tcpip_thread
- *
- * @param msec time in milliseconds for timeout
- * @param h function to be called on timeout
- * @param arg argument to pass to timeout function h
- * @return ERR_MEM on memory error, ERR_OK otherwise
- */
-err_t
-tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
-{
-  struct tcpip_msg *msg;
-
-  if (sys_mbox_valid(&mbox)) {
-    msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
-    if (msg == NULL) {
-      return ERR_MEM;
-    }
-
-    msg->type = TCPIP_MSG_TIMEOUT;
-    msg->msg.tmo.msecs = msecs;
-    msg->msg.tmo.h = h;
-    msg->msg.tmo.arg = arg;
-    sys_mbox_post(&mbox, msg);
-    return ERR_OK;
-  }
-  return ERR_VAL;
-}
-
-/**
- * call sys_untimeout in tcpip_thread
- *
- * @param msec time in milliseconds for timeout
- * @param h function to be called on timeout
- * @param arg argument to pass to timeout function h
- * @return ERR_MEM on memory error, ERR_OK otherwise
- */
-err_t
-tcpip_untimeout(sys_timeout_handler h, void *arg)
-{
-  struct tcpip_msg *msg;
-
-  if (sys_mbox_valid(&mbox)) {
-    msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
-    if (msg == NULL) {
-      return ERR_MEM;
-    }
-
-    msg->type = TCPIP_MSG_UNTIMEOUT;
-    msg->msg.tmo.h = h;
-    msg->msg.tmo.arg = arg;
-    sys_mbox_post(&mbox, msg);
-    return ERR_OK;
-  }
-  return ERR_VAL;
-}
-#endif /* LWIP_TCPIP_TIMEOUT */
-
-#if LWIP_NETCONN
-/**
- * Call the lower part of a netconn_* function
- * This function is then running in the thread context
- * of tcpip_thread and has exclusive access to lwIP core code.
- *
- * @param apimsg a struct containing the function to call and its parameters
- * @return ERR_OK if the function was called, another err_t if not
- */
-err_t
+/*-----------------------------------------------------------------------------------*/
+void
 tcpip_apimsg(struct api_msg *apimsg)
 {
-  struct tcpip_msg msg;
-#ifdef LWIP_DEBUG
-  /* catch functions that don't set err */
-  apimsg->msg.err = ERR_VAL;
-#endif
-  
-  if (sys_mbox_valid(&mbox)) {
-    msg.type = TCPIP_MSG_API;
-    msg.msg.apimsg = apimsg;
-    sys_mbox_post(&mbox, &msg);
-    sys_arch_sem_wait(&apimsg->msg.conn->op_completed, 0);
-    return apimsg->msg.err;
+  struct tcpip_msg *msg;
+  msg = memp_mallocp(MEMP_TCPIP_MSG);
+  if(msg == NULL) {
+    memp_free(MEMP_API_MSG, apimsg);
+    return;
   }
-  return ERR_VAL;
+  msg->type = TCPIP_MSG_API;
+  msg->msg.apimsg = apimsg;
+  sys_mbox_post(mbox, msg);
 }
-
-#if LWIP_TCPIP_CORE_LOCKING
-/**
- * Call the lower part of a netconn_* function
- * This function has exclusive access to lwIP core code by locking it
- * before the function is called.
- *
- * @param apimsg a struct containing the function to call and its parameters
- * @return ERR_OK (only for compatibility fo tcpip_apimsg())
- */
-err_t
-tcpip_apimsg_lock(struct api_msg *apimsg)
-{
-#ifdef LWIP_DEBUG
-  /* catch functions that don't set err */
-  apimsg->msg.err = ERR_VAL;
-#endif
-
-  LOCK_TCPIP_CORE();
-  apimsg->function(&(apimsg->msg));
-  UNLOCK_TCPIP_CORE();
-  return apimsg->msg.err;
-
-}
-#endif /* LWIP_TCPIP_CORE_LOCKING */
-#endif /* LWIP_NETCONN */
-
-#if LWIP_NETIF_API
-#if !LWIP_TCPIP_CORE_LOCKING
-/**
- * Much like tcpip_apimsg, but calls the lower part of a netifapi_*
- * function.
- *
- * @param netifapimsg a struct containing the function to call and its parameters
- * @return error code given back by the function that was called
- */
-err_t
-tcpip_netifapi(struct netifapi_msg* netifapimsg)
-{
-  struct tcpip_msg msg;
-  
-  if (sys_mbox_valid(&mbox)) {
-    err_t err = sys_sem_new(&netifapimsg->msg.sem, 0);
-    if (err != ERR_OK) {
-      netifapimsg->msg.err = err;
-      return err;
-    }
-    
-    msg.type = TCPIP_MSG_NETIFAPI;
-    msg.msg.netifapimsg = netifapimsg;
-    sys_mbox_post(&mbox, &msg);
-    sys_sem_wait(&netifapimsg->msg.sem);
-    sys_sem_free(&netifapimsg->msg.sem);
-    return netifapimsg->msg.err;
-  }
-  return ERR_VAL;
-}
-#else /* !LWIP_TCPIP_CORE_LOCKING */
-/**
- * Call the lower part of a netifapi_* function
- * This function has exclusive access to lwIP core code by locking it
- * before the function is called.
- *
- * @param netifapimsg a struct containing the function to call and its parameters
- * @return ERR_OK (only for compatibility fo tcpip_netifapi())
- */
-err_t
-tcpip_netifapi_lock(struct netifapi_msg* netifapimsg)
-{
-  LOCK_TCPIP_CORE();  
-  netifapimsg->function(&(netifapimsg->msg));
-  UNLOCK_TCPIP_CORE();
-  return netifapimsg->msg.err;
-}
-#endif /* !LWIP_TCPIP_CORE_LOCKING */
-#endif /* LWIP_NETIF_API */
-
-/**
- * Initialize this module:
- * - initialize all sub modules
- * - start the tcpip_thread
- *
- * @param initfunc a function to call when tcpip_thread is running and finished initializing
- * @param arg argument to pass to initfunc
- */
+/*-----------------------------------------------------------------------------------*/
 void
-tcpip_init(tcpip_init_done_fn initfunc, void *arg)
+tcpip_init(void (* initfunc)(void *), void *arg)
 {
-  lwip_init();
-
   tcpip_init_done = initfunc;
   tcpip_init_done_arg = arg;
-  if(sys_mbox_new(&mbox, TCPIP_MBOX_SIZE) != ERR_OK) {
-    LWIP_ASSERT("failed to create tcpip_thread mbox", 0);
-  }
-#if LWIP_TCPIP_CORE_LOCKING
-  if(sys_mutex_new(&lock_tcpip_core) != ERR_OK) {
-    LWIP_ASSERT("failed to create lock_tcpip_core", 0);
-  }
-#endif /* LWIP_TCPIP_CORE_LOCKING */
-
-  sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO);
+  mbox = sys_mbox_new();
+  sys_thread_new((void *)tcpip_thread, NULL);
 }
+/*-----------------------------------------------------------------------------------*/
 
-/**
- * Simple callback function used with tcpip_callback to free a pbuf
- * (pbuf_free has a wrong signature for tcpip_callback)
- *
- * @param p The pbuf (chain) to be dereferenced.
- */
-static void
-pbuf_free_int(void *p)
-{
-  struct pbuf *q = (struct pbuf *)p;
-  pbuf_free(q);
-}
 
-/**
- * A simple wrapper function that allows you to free a pbuf from interrupt context.
- *
- * @param p The pbuf (chain) to be dereferenced.
- * @return ERR_OK if callback could be enqueued, an err_t if not
- */
-err_t
-pbuf_free_callback(struct pbuf *p)
-{
-  return tcpip_callback_with_block(pbuf_free_int, p, 0);
-}
 
-/**
- * A simple wrapper function that allows you to free heap memory from
- * interrupt context.
- *
- * @param m the heap memory to free
- * @return ERR_OK if callback could be enqueued, an err_t if not
- */
-err_t
-mem_free_callback(void *m)
-{
-  return tcpip_callback_with_block(mem_free, m, 0);
-}
-
-#endif /* !NO_SYS */

src/arch/6502/README

@@ -0,0 +1 @@
+The 6502 code is far from complete.

src/arch/6502/include/arch/cc.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __CC_H__
+#define __CC_H__
+
+typedef unsigned   char    u8_t;
+typedef signed     char    s8_t;
+typedef unsigned   short   u16_t;
+typedef signed     short   s16_t;
+typedef unsigned   long    u32_t;
+typedef signed     long    s32_t;
+
+#define PACK_STRUCT_BEGIN
+#define PACK_STRUCT_STRUCT
+#define PACK_STRUCT_END
+#define PACK_STRUCT_FIELD(x) x
+
+#endif /* __CC_H__ */

src/arch/6502/include/arch/cpu.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __CPU_H__
+#define __CPU_H__
+
+#define BYTE_ORDER LITTLE_ENDIAN
+
+#endif /* __CPU_H__ */

src/arch/6502/include/arch/lib.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LIB_H__
+#define __LIB_H__
+
+int strlen(const char *str);
+int strncmp(const char *str1, const char *str2, int len);
+void bcopy(const void *src, void *dest, int len);
+void bzero(void *data, int n);
+
+#endif /* __LIB_H__ */

src/arch/6502/include/arch/perf.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __PERF_H__
+#define __PERF_H__
+
+#define PERF_START    /* null definition */
+#define PERF_STOP(x)  /* null definition */
+
+#endif /* __PERF_H__ */

src/arch/6502/include/arch/sys_arch.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __SYS_C64_H__
+#define __SYS_C64_H__
+
+#define SYS_MBOX_NULL 0
+
+typedef int sys_sem_t;
+typedef int sys_mbox_t;
+typedef int sys_thread_t;
+
+#endif /* __SYS_C64_H__ */

src/arch/6502/lib_arch.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/* These are generic implementations of various library functions used
+ * throughout the lwIP code. When porting, those should be optimized
+ * for the particular processor architecture, preferably coded in
+ * assembler.
+ */
+
+#include "lwip/arch.h"
+
+/*-----------------------------------------------------------------------------------*/
+void
+bcopy(const void *src, void *dst, unsigned int size)
+{
+  char *csrc, *cdst;
+  unsigned int i;
+
+  csrc = (char *)src;
+  cdst = dst;
+  
+  for(i = 0; i < size; ++i) {
+    cdst[i] = csrc[i];
+  }    
+}
+/*-----------------------------------------------------------------------------------*/
+void
+bzero(void *s, int n)
+{
+  for(--n ;n >= 0; --n) {
+    ((char *)s)[n] = 0;
+  }
+}
+/*-----------------------------------------------------------------------------------*/

src/arch/6502/sys_c64.c

@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include <c64.h>
+#include <time.h>
+
+#include "lwip/sys.h"
+#include "lwip/def.h"
+
+struct sys_timeouts timeouts;
+
+/*-----------------------------------------------------------------------------------*/
+void
+sys_arch_block(u16_t time)
+{
+  u16_t ticks;
+  
+  ticks = time * (CLK_TCK / 1000) + clock();
+  printf("ticks %d\n", ticks);
+
+  while(clock() != ticks);  
+}
+/*-----------------------------------------------------------------------------------*/
+sys_mbox_t
+sys_mbox_new(void)
+{
+  return SYS_MBOX_NULL;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_mbox_free(sys_mbox_t mbox)
+{
+  return;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_mbox_post(sys_mbox_t mbox, void *data)
+{
+  return;
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t 
+sys_arch_mbox_fetch(sys_mbox_t mbox, void **data, u16_t timeout)
+{
+  sys_arch_block(timeout);
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+sys_sem_t
+sys_sem_new(u8_t count)
+{
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+sys_arch_sem_wait(sys_sem_t sem, u16_t timeout)
+{
+  sys_arch_block(timeout);
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_sem_signal(sys_sem_t sem)
+{
+  return;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_sem_free(sys_sem_t sem)
+{
+  return;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_init(void)
+{
+  timeouts.next = NULL;
+  return;
+}
+/*-----------------------------------------------------------------------------------*/
+struct sys_timeouts *
+sys_arch_timeouts(void)
+{
+  return &timeouts;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_thread_new(void (* function)(void *arg), void *arg)
+{
+}
+/*-----------------------------------------------------------------------------------*/

src/arch/FILES

@@ -0,0 +1,15 @@
+6502/      - Architectural files for the 6502 CPU.
+
+rtxc/      - Architectural files for the RTXC operating system.
+
+unix/      - Architectural files for testing on unix-like systems
+             (assuming gcc and pthreads).
+
+Each subdirectory (may) also include:
+
+perf.c     - Optional file that should be implemented when running
+             performance tests of lwIP.
+
+sys.c      - Implementation of the operating system emulation layer.
+
+netif/	   - Architectural specific network interfaces.

src/arch/rtxc/include/arch/cc.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __CC_H__
+#define __CC_H__
+
+typedef unsigned   char    u8_t;
+typedef signed     char    s8_t;
+typedef unsigned   short   u16_t;
+typedef signed     short   s16_t;
+typedef unsigned   long    u32_t;
+typedef signed     long    s32_t;
+
+#define PACK_STRUCT_BEGIN
+#define PACK_STRUCT_STRUCT
+#define PACK_STRUCT_END
+#define PACK_STRUCT_FIELD(x) x
+
+#endif /* __CC_H__ */

src/arch/rtxc/include/arch/cpu.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __CPU_H__
+#define __CPU_H__
+
+#define BYTE_ORDER LITTLE_ENDIAN
+
+#endif /* __CPU_H__ */

src/arch/rtxc/include/arch/init.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __ARCH_INIT_H__
+#define __ARCH_INIT_H__
+
+#define TCPIP_INIT_DONE(arg)  tcpip_init_done(arg)
+
+void tcpip_init_done(void *);
+int wait_for_tcpip_init(void);
+
+#endif /* __ARCH_INIT_H__ */
+
+
+
+

src/arch/rtxc/include/arch/lib.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LIB_H__
+#define __LIB_H__
+
+#include <string.h>
+
+#define bcopy(s, d, l) memcpy(d, s, l)
+#define bzero(d, l)    memset(d, 0, l)
+
+#endif /* __LIB_H__ */

src/arch/rtxc/include/arch/perf.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __PERF_H__
+#define __PERF_H__
+
+#define PERF_START    /* null definition */
+#define PERF_STOP(x)  /* null definition */
+
+#endif /* __PERF_H__ */

src/arch/rtxc/include/arch/sys_arch.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __SYS_RTXC_H__
+#define __SYS_RTXC_H__
+
+#include "rtxcapi.h"
+
+#define SYS_MBOX_NULL (QUEUE)0
+#define SYS_SEM_NULL  (SEMA)0
+
+typedef SEMA sys_sem_t;
+typedef QUEUE sys_mbox_t;
+typedef TASK sys_thread_t;
+
+#endif /* __SYS_RTXC_H__ */
+

src/arch/rtxc/include/netif/cs8900if.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __NETIF_CS8900IF_H__
+#define __NETIF_CS8900IF_H__
+
+#include "lwip/netif.h"
+
+void cs8900if_init(struct netif *);
+u8_t cs8900if_poll(struct netif *);
+void cs8900if_input(struct netif *); 
+
+#endif /* __NETIF_CS8900IF_H__ */

src/arch/rtxc/include/netif/sioslipif.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __NETIF_SIOSLIPIF_H__
+#define __NETIF_SIOSLIPIF_H__
+
+#include "lwip/netif.h"
+
+void sioslipif_init(struct netif *);
+
+#endif /* __NETIF_SIOSLIPIF_H__ */

src/arch/rtxc/lib.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/* These are generic implementations of various library functions used
+ * throughout the lwIP code. When porting, those should be optimized
+ * for the particular processor architecture, preferably coded in
+ * assembler.
+ */
+
+#if 0 /* Define to 1 if these are really needed. */
+/*-----------------------------------------------------------------------------------*/
+void
+bcopy(const void *src, void *dst, unsigned int size)
+{
+  char *csrc, *cdst;
+  unsigned int i;
+
+  csrc = (char *)src;
+  cdst = dst;
+  
+  for(i = 0; i < size; ++i) {
+    cdst[i] = csrc[i];
+  }    
+}
+/*-----------------------------------------------------------------------------------*/
+void
+bzero(void *s, int n)
+{
+  for(--n ;n >= 0; --n) {
+    ((char *)s)[n] = 0;
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+#endif /* 0 */

src/arch/rtxc/netif/FILES

@@ -0,0 +1 @@
+sioslipif.c - Implementation of the SLIP protocol on top of a serial line.

src/arch/rtxc/netif/sioslipif.c

@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+#include "lwip/def.h"
+#include "netif/sioslipif.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+
+#define SLIP_END     0300
+#define SLIP_ESC     0333
+#define SLIP_ESC_END 0334
+#define SLIP_ESC_ESC 0335
+
+/* This variable is used for passing the netif pointer between the
+   threads. */
+static struct netif *netif_pass;
+
+static int infd, outfd;
+/*-----------------------------------------------------------------------------------*/
+static void
+sio_send(u8_t c)
+{
+  write(outfd, &c, 1);
+}
+/*-----------------------------------------------------------------------------------*/
+static u8_t
+sio_recv(void)
+{
+  u8_t c;
+  read(infd, &c, 1);
+  return c;
+}
+/*-----------------------------------------------------------------------------------*/
+static int
+sioslipif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr)
+{
+  struct pbuf *q;
+  int i;
+  u8_t c;
+  
+  /* Send pbuf out on the serial I/O device. */
+  sio_send(SLIP_END);
+  
+  for(q = p; q != NULL; q = q->next) {
+    for(i = 0; i < q->len; i++) {
+      c = ((u8_t *)q->payload)[i];
+      switch(c) {
+      case SLIP_END:
+        sio_send(SLIP_ESC);
+        sio_send(SLIP_ESC_END);
+        break;
+      case SLIP_ESC:
+        sio_send(SLIP_ESC);
+        sio_send(SLIP_ESC_ESC);
+        break;
+      default:
+        sio_send(c);
+        break;
+      }
+    }
+  }
+  sio_send(SLIP_END);
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+static struct pbuf *
+sioslipif_input(void)
+{
+  u8_t c;
+  struct pbuf *p, *q;
+  int recved;
+  int i;
+
+  p = pbuf_alloc(PBUF_LINK, PBUF_MAX_SIZE, PBUF_POOL);
+  q = p;
+  recved = i = 0;
+  
+  while(1) {
+    c = sio_recv();
+    switch(c) {
+    case SLIP_END:
+      if(recved > 0) {
+        /* Received whole packet. */
+        pbuf_realloc(p, recved);
+        return p;
+      }
+      break;
+    case SLIP_ESC:
+      c = sio_recv();
+      switch(c) {
+      case SLIP_ESC_END:
+        c = SLIP_END;
+        break;
+      case SLIP_ESC_ESC:
+        c = SLIP_ESC;
+        break;
+      }
+      /* FALLTHROUGH */
+    default:
+      if(recved < p->tot_len && q != NULL) {
+        ((u8_t *)q->payload)[i] = c;
+        recved++;
+        i++;
+        if(i >= q->len) {
+          i = 0;
+          q = q->next;
+        }
+      }
+      break;
+    }
+    
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+sioslipif_loop(void)
+{
+  struct pbuf *p;
+  struct netif *netif;
+
+  netif = netif_pass;
+  while(1) {
+    p = sioslipif_input();    
+    netif->input(p, netif);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sioslipif_init(struct netif *netif)
+{
+  netif->state = NULL;
+  netif->name[0] = 's';
+  netif->name[1] = 'l';
+  netif->output = sioslipif_output;
+
+  netif_pass = netif;
+  sys_thread_new((void *)sioslipif_loop, NULL);
+  /* Do some magic to make it possible to receive data from the serial I/O device. */
+}
+/*-----------------------------------------------------------------------------------*/

src/arch/rtxc/perf.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "arch/perf.h"
+
+void
+perf_init(char *fname)
+{
+}

src/arch/rtxc/sys_arch.c

@@ -0,0 +1,271 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include "lwip/def.h"
+#include "lwip/sys.h"
+#include "lwip/mem.h"
+
+#include "rtxcapi.h"
+#include "csema.h"
+#include "cclock.h"
+#include "cqueue.h"
+#include "cres.h"
+#include "cpart.h"
+#include "ctask.h"
+
+struct timeoutlist {
+  struct sys_timeouts timeouts;
+  TASK pid;
+};
+
+#define SYS_THREAD_MAX 2
+
+static struct timeoutlist timeoutlist[SYS_THREAD_MAX];
+static u16_t nextthread = 0;
+
+/*-----------------------------------------------------------------------------------*/
+sys_mbox_t
+sys_mbox_new(void)
+{
+  QUEUE mbox;  
+  KS_dequeuew(IP_MBOXQ, &mbox);
+  KS_purgequeue(mbox);
+  return mbox;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_mbox_free(sys_mbox_t mbox)
+{
+  KS_enqueue(IP_MBOXQ, &mbox);
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_mbox_post(sys_mbox_t mbox, void *data)
+{
+  if(KS_enqueue(mbox, &data) != RC_GOOD) {
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+sys_arch_mbox_fetch(sys_mbox_t mbox, void **data, u16_t timeout)
+{
+  KSRC ret;
+  u16_t wtime = 1;
+  
+  if(timeout == 0) {
+    DEBUGF(SYS_DEBUG, ("PID: %d sys_mbox_fetch: without timeouts\n",KS_inqtask()));
+    KS_dequeuew(mbox, data);
+    
+  } else { 
+  
+    ret = KS_dequeuet(mbox, data, (TICKS)timeout/CLKTICK);
+    if(ret == RC_TIMEOUT) {
+      /* The call timed out, so we return 0. */
+      wtime = 0;
+    } else {
+      /* Calculate time we waited for the message to arrive. */
+      
+      /* XXX: we cheat and just pretend that we waited for half the timeout value! */
+      wtime = timeout / 2;
+      
+      /* Make sure we don't return 0 here. */
+      if(wtime == 0) {
+	wtime = 1;
+      }
+    }
+  }
+  return wtime;
+}
+/*-----------------------------------------------------------------------------------*/
+sys_sem_t
+sys_sem_new(u8_t count)
+{
+  SEMA sem;
+  KS_dequeuew(IP_SEMQ, &sem);
+  KS_pend(sem);
+  if(count > 0) {
+    KS_signal(sem);
+  }
+  return sem;
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+sys_arch_sem_wait(sys_sem_t sem, u16_t timeout)
+{
+  KSRC ret;
+  u16_t wtime = 1;
+  
+  if(timeout == 0) {
+    DEBUGF(SYS_DEBUG, ("PID: %d sys_mbox_fetch: without timeouts\n",KS_inqtask()));
+    KS_wait(sem);
+    
+  } else { 
+    ret = KS_waitt(sem, (TICKS)timeout/CLKTICK);  
+    if(ret == RC_TIMEOUT) {
+      /* The call timed out, so we return 0. */
+      wtime = 0;
+    } else {
+      /* Calculate time we waited for the message to arrive. */
+      
+      /* XXX: we cheat and just pretend that we waited for half the timeout value! */
+      wtime = timeout / 2;
+      
+      /* Make sure we don't return 0 here. */
+      if(wtime == 0) {
+	wtime = 1;
+      }
+    }
+  }
+  return wtime;
+
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_sem_signal(sys_sem_t sem)
+{
+  KS_signal(sem);
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_sem_free(sys_sem_t sem)
+{
+  KS_enqueue(IP_SEMQ, &sem);
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_init(void)
+{
+  /* posta in alla semaforer i IP_SEMQ, posta in alla mboxar i
+     IP_MBOXQ */
+  QUEUE mbox;
+  SEMA  sem;
+  
+  mbox = IP_Q_01; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_02; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_03; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_04; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_05; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_06; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_07; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_08; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_09; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_10; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_11; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_12; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_13; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_14; KS_enqueue(IP_MBOXQ, &mbox);
+  mbox = IP_Q_15; KS_enqueue(IP_MBOXQ, &mbox);
+  sem  = IP_S_01; KS_enqueue(IP_SEMQ,  &sem);
+  sem  = IP_S_02; KS_enqueue(IP_SEMQ,  &sem);
+  sem  = IP_S_03; KS_enqueue(IP_SEMQ,  &sem);
+}
+/*-----------------------------------------------------------------------------------*/
+struct sys_timeouts *
+sys_arch_timeouts(void)
+{
+  int i;
+  TASK pid;
+  struct timeoutlist *tl;  
+  
+  DEBUGF(SYS_DEBUG, ("PID: %d sys_mbox_fetch: timeoutlist not empty\n",KS_inqtask()));
+  pid = KS_inqtask();
+  for(i = 0; i < nextthread; i++) {
+    tl = &timeoutlist[i];
+    if(tl->pid == pid) {
+      DEBUGF(SYS_DEBUG, ("PID: %d sys_mbox_fetch: corresponding pid found!\n",KS_inqtask()));
+      return &(tl->timeouts);
+    }
+  }
+
+  /* Error! */
+  return NULL;
+}
+/*-----------------------------------------------------------------------------------*/
+struct sys_thread_arg {
+  void (* thread)(void *);
+  void *threadarg;
+  SEMA sem;
+};
+/*-----------------------------------------------------------------------------------*/
+static void
+sys_thread(void)
+{
+  struct sys_thread_arg *arg;
+  void (* thread)(void *);
+  void *threadarg;
+  
+  arg = KS_inqtask_arg(0);
+  if(arg != NULL) {
+
+    timeoutlist[nextthread].timeouts.next = NULL;
+    timeoutlist[nextthread].pid = KS_inqtask();
+
+    ++nextthread;
+    
+    thread = arg->thread;
+    threadarg = arg->threadarg;
+    KS_signal(arg->sem);
+    thread(threadarg);
+  }
+  KS_terminate(0);
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_thread_new(void (* function)(void *arg), void *arg) 
+{
+  TASK newtask;
+  PRIORITY pri = 2;       /* This may have to be changed. */
+  char *stack;
+  int stacksize = 512;   /* This may have to be changed. */
+  struct sys_thread_arg threadarg;
+  
+  
+  newtask = KS_alloc_task();
+  stack = KS_allocw(MAP512);
+  
+  KS_deftask(newtask, pri, (char ks_stk *)stack, (size_t)stacksize, (void (*)(void))sys_thread);
+  
+  threadarg.thread = function;
+  threadarg.threadarg = arg;
+  threadarg.sem = THRDSYNC;
+  KS_deftask_arg(newtask, &threadarg);    
+  KS_execute(newtask);
+  KS_wait(THRDSYNC);
+}
+
+
+
+
+
+

src/arch/unix/include/arch/cc.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __ARCH_CC_H__
+#define __ARCH_CC_H__
+
+typedef unsigned   char    u8_t;
+typedef signed     char    s8_t;
+/*typedef unsigned   short   u8_t;
+  typedef signed     short   s8_t; */
+typedef unsigned   short   u16_t;
+typedef signed     short   s16_t;
+typedef unsigned   long    u32_t;
+typedef signed     long    s32_t;
+
+typedef u32_t mem_ptr_t;
+
+#define PACK_STRUCT_FIELD(x) x __attribute__((packed))
+#define PACK_STRUCT_STRUCT __attribute__((packed))
+#define PACK_STRUCT_BEGIN
+#define PACK_STRUCT_END
+
+#endif /* __ARCH_CC_H__ */

src/arch/unix/include/arch/cpu.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __ARCH_CPU_H__
+#define __ARCH_CPU_H__
+
+#ifndef BYTE_ORDER
+#define BYTE_ORDER LITTLE_ENDIAN
+#endif /* BYTE_ORDER */
+
+#endif /* __ARCH_CPU_H__ */

src/arch/unix/include/arch/init.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __ARCH_INIT_H__
+#define __ARCH_INIT_H__
+
+#define TCPIP_INIT_DONE(arg) sys_sem_signal(*(sys_sem_t *)arg)
+
+#endif /* __ARCH_INIT_H__ */
+
+
+
+

src/arch/unix/include/arch/lib.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __ARCH_LIB_H__
+#define __ARCH_LIB_H__
+
+#ifndef _STRING_H_
+#ifndef _STRING_H
+int strlen(const char *str);
+int strncmp(const char *str1, const char *str2, int len);
+void bcopy(const void *src, void *dest, int len);
+void bzero(void *data, int n);
+#endif /* _STRING_H */
+#endif /* _STRING_H_ */
+
+#endif /* __ARCH_LIB_H__ */

src/arch/unix/include/arch/perf.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __ARCH_PERF_H__
+#define __ARCH_PERF_H__
+
+#include <sys/times.h>
+
+#ifdef PERF
+#define PERF_START  { \
+                         unsigned long __c1l, __c1h, __c2l, __c2h; \
+                         __asm__(".byte 0x0f, 0x31" : "=a" (__c1l), "=d" (__c1h))
+#define PERF_STOP(x)   __asm__(".byte 0x0f, 0x31" : "=a" (__c2l), "=d" (__c2h)); \
+                       perf_print(__c1l, __c1h, __c2l, __c2h, x);}
+
+/*#define PERF_START do { \
+                     struct tms __perf_start, __perf_end; \
+                     times(&__perf_start)
+#define PERF_STOP(x) times(&__perf_end); \
+                     perf_print_times(&__perf_start, &__perf_end, x);\
+                     } while(0)*/
+#else /* PERF */
+#define PERF_START    /* null definition */
+#define PERF_STOP(x)  /* null definition */
+#endif /* PERF */
+
+void perf_print(unsigned long c1l, unsigned long c1h,
+		unsigned long c2l, unsigned long c2h,
+		char *key);
+
+void perf_print_times(struct tms *start, struct tms *end, char *key);
+
+void perf_init(char *fname);
+
+#endif /* __ARCH_PERF_H__ */

src/arch/unix/include/arch/sys_arch.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __ARCH_SYS_ARCH_H__
+#define __ARCH_SYS_ARCH_H__
+
+#define SYS_MBOX_NULL NULL
+#define SYS_SEM_NULL  NULL
+
+struct sys_sem;
+typedef struct sys_sem * sys_sem_t;
+
+struct sys_mbox;
+typedef struct sys_mbox *sys_mbox_t;
+
+struct sys_thread;
+typedef struct sys_thread * sys_thread_t;
+
+#endif /* __ARCH_SYS_ARCH_H__ */
+

src/arch/unix/include/netif/delif.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
@@ -26,63 +26,17 @@
  *
  * This file is part of the lwIP TCP/IP stack.
  * 
- * Author: Jani Monoses <jani@iv.ro>
+ * Author: Adam Dunkels <adam@sics.se>
  *
  */
+#ifndef __DELIF_H__
+#define __DELIF_H__
 
-#ifndef __LWIP_IP_FRAG_H__
-#define __LWIP_IP_FRAG_H__
-
-#include "lwip/opt.h"
-#include "lwip/err.h"
-#include "lwip/pbuf.h"
 #include "lwip/netif.h"
-#include "lwip/ip_addr.h"
-#include "lwip/ip.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "lwip/pbuf.h"
 
-#if IP_REASSEMBLY
-/* The IP reassembly timer interval in milliseconds. */
-#define IP_TMR_INTERVAL 1000
+void delif_init(struct netif *netif);
+void delif_init_thread(struct netif *netif);
 
-/* IP reassembly helper struct.
- * This is exported because memp needs to know the size.
- */
-struct ip_reassdata {
-  struct ip_reassdata *next;
-  struct pbuf *p;
-  struct ip_hdr iphdr;
-  u16_t datagram_len;
-  u8_t flags;
-  u8_t timer;
-};
-
-void ip_reass_init(void);
-void ip_reass_tmr(void);
-struct pbuf * ip_reass(struct pbuf *p);
-#endif /* IP_REASSEMBLY */
-
-#if IP_FRAG
-#if !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF
-/** A custom pbuf that holds a reference to another pbuf, which is freed
- * when this custom pbuf is freed. This is used to create a custom PBUF_REF
- * that points into the original pbuf. */
-struct pbuf_custom_ref {
-  /** 'base class' */
-  struct pbuf_custom pc;
-  /** pointer to the original pbuf that is referenced */
-  struct pbuf *original;
-};
-#endif /* !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF */
-
-err_t ip_frag(struct pbuf *p, struct netif *netif, ip_addr_t *dest);
-#endif /* IP_FRAG */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __LWIP_IP_FRAG_H__ */
+#endif /* __DELIF_H__ */

src/arch/unix/include/netif/dropif.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __DROPIF_H__
+#define __DROPIF_H__
+
+#include "lwip/netif.h"
+
+#include "lwip/pbuf.h"
+
+void dropif_init(struct netif *netif);
+
+#endif /* __DROPIF_H__ */

src/arch/unix/include/netif/pcapif.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __PCAPIF_H__
+#define __PCAPIF_H__
+
+#include "lwip/netif.h"
+
+void pcapif_init(struct netif *netif);
+
+#endif /* __PCAPIF_H__ */

src/arch/unix/include/netif/sioslipif.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __NETIF_SIOSLIPIF_H__
+#define __NETIF_SIOSLIPIF_H__
+
+#include "lwip/netif.h"
+
+void sioslipif_init(struct netif *);
+
+
+void sioslipif_init1(struct netif *);
+void sioslipif_init2(struct netif *);
+
+#endif /* __NETIF_SIOSLIPIF_H__ */

src/arch/unix/include/netif/tapif.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __TAPIF_H__
+#define __TAPIF_H__
+
+#include "lwip/netif.h"
+
+void tapif_init(struct netif *netif);
+
+#endif /* __TAPIF_H__ */

src/arch/unix/include/netif/tunif.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __TUNIF_H__
+#define __TUNIF_H__
+
+#include "lwip/netif.h"
+
+#include "lwip/pbuf.h"
+
+void tunif_init(struct netif *netif);
+void tunif_init_thread(struct netif *netif);
+
+#endif /* __TUNIF_H__ */

src/arch/unix/include/netif/unixif.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __UNIXIF_H__
+#define __UNIXIF_H__
+
+#include "lwip/netif.h"
+
+void unixif_init_server(struct netif *netif);
+void unixif_init_client(struct netif *netif);
+
+#endif /* __UNIXIF_H__ */

src/arch/unix/lwip_chksum.c

@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include "lwip/arch.h"
+
+#include "lwip/def.h"
+#include "lwip/inet.h"
+
+
+/*-----------------------------------------------------------------------------------*/
+/* lwip_chksum:
+ *
+ * Sums up all 16 bit words in a memory portion. Also includes any odd byte.
+ * This function is used by the other checksum functions.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+#if 0
+u16_t
+lwip_chksum(void *dataptr, int len)
+{
+  u32_t acc;
+    
+  for(acc = 0; len > 1; len -= 2) {
+    acc += *((u16_t *)dataptr)++;
+  }
+
+  /* add up any odd byte */
+  if(len == 1) {
+    acc += htons((u16_t)((*(u8_t *)dataptr) & 0xff) << 8);
+    DEBUGF(INET_DEBUG, ("inet: chksum: odd byte %d\n", *(u8_t *)dataptr));
+  }
+  acc = (acc >> 16) + (acc & 0xffffUL);
+
+  if(acc & 0xffff0000 != 0) {
+    acc = (acc >> 16) + (acc & 0xffffUL);
+  }
+
+  return (u16_t)acc;
+}
+/*-----------------------------------------------------------------------------------*/
+#endif

src/arch/unix/netif/delif.c

@@ -0,0 +1,310 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include <stdlib.h> 
+
+#include "lwip/def.h"
+#include "netif/delif.h"
+
+#ifdef linux
+#include "netif/tapif.h"
+#else /* linux */
+#include "netif/tunif.h"
+#endif /* linux */
+
+#include "lwip/sys.h"
+
+
+#define DELIF_INPUT_DROPRATE 0.1
+#define DELIF_OUTPUT_DROPRATE 0.1
+
+#define DELIF_INPUT_DELAY  500      /* Miliseconds. */
+#define DELIF_OUTPUT_DELAY 500      /* Miliseconds. */
+
+#define DELIF_TIMEOUT 10
+
+struct delif {
+  err_t (* input)(struct pbuf *p, struct netif *inp);
+  struct netif *netif;
+};
+
+struct delif_pbuf {
+  struct delif_pbuf *next;
+  struct pbuf *p;
+  struct ip_addr *ipaddr;
+  unsigned int time;
+};
+
+static struct delif_pbuf *input_list = NULL;
+static struct delif_pbuf *output_list = NULL;
+/*-----------------------------------------------------------------------------------*/
+static void
+delif_input_timeout(void *arg)
+{
+  struct netif *netif;
+  struct delif *delif;
+  struct delif_pbuf *dp;
+  unsigned int timeout, now;
+
+  timeout = DELIF_TIMEOUT;
+  
+  netif = arg;
+  delif = netif->state;
+
+  
+  /* Check if there is anything on the input list. */
+  dp = input_list;
+  while(dp != NULL) {
+    now = sys_now();
+    
+    if(dp->time <= now) {
+      delif->input(dp->p, netif);
+      if(dp->next != NULL) {
+	if(dp->next->time > now) {
+	  timeout = dp->next->time - now;
+	} else {
+	  timeout = 0;
+	}
+	DEBUGF(DELIF_DEBUG, ("delif_output_timeout: timeout %u.\n", timeout));
+
+      }
+      input_list = dp->next;
+      free(dp);
+      dp = input_list;
+    } else {
+      dp = dp->next;	
+    }
+  }
+  
+  sys_timeout(timeout, delif_input_timeout, arg);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+delif_output_timeout(void *arg)
+{
+  struct netif *netif;
+  struct delif *delif;
+  struct delif_pbuf *dp;
+  unsigned int timeout, now;
+
+  timeout = DELIF_TIMEOUT;
+
+  netif = arg;
+  delif = netif->state;
+  
+  /* Check if there is anything on the output list. */
+  dp = output_list;
+  while(dp != NULL) {
+    now = sys_now();
+    if(dp->time <= now) {
+      DEBUGF(DELIF_DEBUG, ("delif_output_timeout: now %u dp->time %u\n",
+	     now, dp->time));
+      delif->netif->output(delif->netif, dp->p, dp->ipaddr);
+      if(dp->next != NULL) {
+	if(dp->next->time > now) {
+	  timeout = dp->next->time - now;
+	} else {
+	  timeout = 0;
+	}
+	DEBUGF(DELIF_DEBUG, ("delif_output_timeout: timeout %u.\n", timeout));
+	
+      }
+      pbuf_free(dp->p);
+      
+      output_list = dp->next;
+      free(dp);
+      dp = output_list;
+    } else {
+      dp = dp->next;	
+    }
+  }
+
+  
+  sys_timeout(timeout, delif_output_timeout, arg);
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+delif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr)
+{
+  struct delif_pbuf *dp, *np;
+  struct pbuf *q;
+  int i, j;
+  char *data;
+
+  DEBUGF(DELIF_DEBUG, ("delif_output\n"));
+    
+#ifdef DELIF_OUTPUT_DROPRATE
+  if(((double)rand()/(double)RAND_MAX) < DELIF_OUTPUT_DROPRATE) {
+    DEBUGF(DELIF_DEBUG, ("delif_output: Packet dropped\n"));
+    return 0;
+  }
+#endif /* DELIF_OUTPUT_DROPRATE */
+
+  
+  DEBUGF(DELIF_DEBUG, ("delif_output\n"));
+
+
+  dp = malloc(sizeof(struct delif_pbuf));
+  data = malloc(p->tot_len);
+    
+  i = 0;
+  for(q = p; q != NULL; q = q->next) {
+    for(j = 0; j < q->len; j++) {
+      data[i] = ((char *)q->payload)[j];
+      i++;
+    }
+  }
+
+  
+  dp->p = pbuf_alloc(PBUF_LINK, 0, PBUF_ROM);
+  dp->p->payload = data;
+  dp->p->len = p->tot_len;
+  dp->p->tot_len = p->tot_len;
+  dp->ipaddr = ipaddr;
+  dp->time = sys_now() + DELIF_OUTPUT_DELAY;
+  dp->next = NULL;
+  if(output_list == NULL) {
+    output_list = dp;
+  } else {
+    for(np = output_list; np->next != NULL; np = np->next);
+    np->next = dp;
+  }
+    
+
+  return ERR_OK;
+    
+
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+delif_input(struct pbuf *p, struct netif *inp)
+{
+  struct delif_pbuf *dp, *np;
+
+  DEBUGF(DELIF_DEBUG, ("delif_input\n"));
+#ifdef DELIF_INPUT_DROPRATE
+  if(((double)rand()/(double)RAND_MAX) < DELIF_INPUT_DROPRATE) {
+    DEBUGF(DELIF_DEBUG, ("delif_input: Packet dropped\n"));
+    pbuf_free(p);
+    return ERR_OK;
+  }
+#endif /* DELIF_INPUT_DROPRATE */
+
+  
+  dp = malloc(sizeof(struct delif_pbuf));
+  dp->p = p;
+  dp->time = sys_now() + DELIF_INPUT_DELAY;
+  dp->next = NULL;
+  if(input_list == NULL) {
+    input_list = dp;
+  } else {
+    for(np = input_list; np->next != NULL; np = np->next);
+    np->next = dp;
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+delif_init(struct netif *netif)
+{
+  struct delif *del;
+  
+  del = malloc(sizeof(struct delif));
+  netif->state = del;
+  netif->name[0] = 'd';
+  netif->name[1] = 'e';
+  netif->output = delif_output;
+
+  del->netif = malloc(sizeof(struct netif));  
+#ifdef linux
+  /*  tapif_init(del->netif);*/
+  tunif_init(del->netif);
+#else /* linux */
+  tunif_init(del->netif);
+#endif /* linux */
+  del->input = netif->input;
+  del->netif->input = delif_input;
+  sys_timeout(DELIF_TIMEOUT, delif_input_timeout, netif);
+  sys_timeout(DELIF_TIMEOUT, delif_output_timeout, netif);
+}
+
+/*-----------------------------------------------------------------------------------*/
+static void 
+delif_thread(void *arg)
+{
+  struct netif *netif = arg;
+  struct delif *del;
+  sys_sem_t sem;
+  
+  del = netif->state;
+#ifdef linux
+  tapif_init(del->netif);
+#else /* linux */
+  tunif_init(del->netif);
+#endif /* linux */
+
+  sys_timeout(DELIF_TIMEOUT, delif_input_timeout, netif);
+  sys_timeout(DELIF_TIMEOUT, delif_output_timeout, netif);
+
+  sem = sys_sem_new(0);
+  sys_sem_wait(sem);
+
+}
+/*-----------------------------------------------------------------------------------*/
+void
+delif_init_thread(struct netif *netif)
+{
+  struct delif *del;
+
+  DEBUGF(DELIF_DEBUG, ("delif_init_thread\n"));
+  
+  del = malloc(sizeof(struct delif));
+  netif->state = del;
+  netif->name[0] = 'd';
+  netif->name[1] = 'e';
+  netif->output = delif_output;
+
+  del->netif = malloc(sizeof(struct netif));
+  del->netif->ip_addr = netif->ip_addr;
+  del->netif->gw = netif->gw;
+  del->netif->netmask = netif->netmask;
+  del->input = netif->input;
+  del->netif->input = delif_input;
+  sys_thread_new(delif_thread, netif);
+}
+
+/*-----------------------------------------------------------------------------------*/
+
+
+

src/arch/unix/netif/list.c

@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+
+#include "lwip/list.h"
+
+#include <stdlib.h>
+
+struct list {
+  struct elem *first, *last;
+  int size, elems;
+};
+
+struct elem {
+  struct elem *next;
+  void *data;
+};
+
+/*-----------------------------------------------------------------------------------*/
+struct list *
+list_new(int size)
+{
+  struct list *list;
+  list = malloc(sizeof(struct list));
+  list->first = list->last = NULL;
+  list->size = size;
+  list->elems = 0;
+  return list;
+}
+/*-----------------------------------------------------------------------------------*/
+int
+list_push(struct list *list, void *data)
+{
+  struct elem *elem;
+  
+  if(list->elems < list->size) {
+    elem = malloc(sizeof(struct elem));
+    elem->data = data;
+    elem->next = NULL;
+    if(list->last != NULL) {
+      list->last->next = elem;
+    }
+    list->last = elem;
+    if(list->first == NULL) {
+      list->first = elem;
+    }
+    list->elems++;
+    return 1;
+  }
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+void *
+list_pop(struct list *list)
+{
+  struct elem *elem;
+  void *data;
+  
+  if(list->elems > 0) {    
+    elem = list->first;
+    if(elem == list->last) {
+      list->last = elem->next;
+    }
+    list->first = elem->next;
+    
+    list->elems--;
+
+    data = elem->data;
+    free(elem);
+
+    return data;
+  }
+  return NULL;
+}
+/*-----------------------------------------------------------------------------------*/
+void *
+list_first(struct list *list)
+{
+  return list->first;
+}
+/*-----------------------------------------------------------------------------------*/
+int
+list_elems(struct list *list)
+{
+  return list->elems;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+list_delete(struct list *list)
+{
+  while(list_pop(list) != NULL);
+  free(list);
+}
+/*-----------------------------------------------------------------------------------*/
+int
+list_remove(struct list *list, void *elem)
+{
+  struct elem *e, *p;
+  
+  p = NULL;
+  for(e = list->first; e != NULL; e = e->next) {
+    if(e->data == elem) {
+      if(p != NULL) {
+        p->next = e->next;
+      } else {
+        list->first = e->next;
+      }
+      if(list->last == e) {
+        list->last = p;
+        if(p != NULL) {
+          p->next = NULL;
+        }
+      }
+      free(e);
+      list->elems--;
+      return 1;
+    } 
+    p = e;    
+  }
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+list_map(struct list *list, void (* func)(void *arg))
+{
+  struct elem *e;
+
+  for(e = list->first; e != NULL; e = e->next) {
+    func(e->data);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+

src/arch/unix/netif/pcapif.c

@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef linux  /* Apparently, this doesn't work under Linux. */
+
+#include "lwip/debug.h"
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <pcap.h>
+
+#include "netif/etharp.h"
+
+#include "lwip/stats.h"
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "netif/unixif.h"
+#include "lwip/sys.h"
+
+#include "lwip/ip.h"
+
+#include "lwip/list.h"
+
+#include "netif/tcpdump.h"
+
+struct pcapif {
+  pcap_t *pd;
+  sys_sem_t sem;
+  u8_t pkt[2048];
+  u32_t len;
+  u32_t lasttime;
+  struct pbuf *p;
+  struct eth_addr *ethaddr;
+};
+
+static char errbuf[PCAP_ERRBUF_SIZE];
+
+/*-----------------------------------------------------------------------------------*/
+static err_t
+pcapif_output(struct netif *netif, struct pbuf *p,
+	      struct ip_addr *ipaddr)
+{
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+timeout(void *arg)
+{
+  struct netif *netif;
+  struct pcapif *pcapif;
+  struct pbuf *p, *q;
+  u8_t *bufptr;
+  struct eth_hdr *ethhdr;
+  
+  netif = (struct netif *)arg;
+  pcapif = netif->state;
+  ethhdr = (struct eth_hdr *)pcapif->pkt;
+
+  
+  if(htons(ethhdr->type) != ETHTYPE_IP ||
+     ip_lookup(pcapif->pkt + 14, netif)) {
+    
+    /* We allocate a pbuf chain of pbufs from the pool. */
+    p = pbuf_alloc(PBUF_LINK, pcapif->len, PBUF_POOL);
+    
+    if(p != NULL) {
+      /* We iterate over the pbuf chain until we have read the entire
+	 packet into the pbuf. */
+      bufptr = (u_char *)pcapif->pkt;
+      for(q = p; q != NULL; q = q->next) {
+	/* Read enough bytes to fill this pbuf in the chain. The
+	   avaliable data in the pbuf is given by the q->len
+	   variable. */
+	/* read data into(q->payload, q->len); */
+	bcopy(bufptr, q->payload, q->len);
+	bufptr += q->len;
+      }
+
+      ethhdr = p->payload;
+      switch(htons(ethhdr->type)) {
+      case ETHTYPE_IP:
+	arp_ip_input(netif, p);
+	pbuf_header(p, -14);
+	netif->input(p, netif);
+	break;
+      case ETHTYPE_ARP:
+	p = arp_arp_input(netif, pcapif->ethaddr, p);
+	if(p != NULL) {
+	  printf("ARP outout\n");
+	  pbuf_free(p);
+	}
+	break;
+      default:
+	pbuf_free(p);
+	break;
+      }
+    }
+  } else {
+    printf("ip_lookup dropped\n");
+  }
+
+  sys_sem_signal(pcapif->sem);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+callback(u_char *arg, const struct pcap_pkthdr *hdr, const u_char *pkt)
+{
+  struct netif *netif;
+  struct pcapif *pcapif;
+  u32_t time, lasttime;
+  
+  netif = (struct netif *)arg;
+  pcapif = netif->state;
+
+  pcapif->len = hdr->len;
+  
+  bcopy(pkt, pcapif->pkt, hdr->len);
+
+  time = hdr->ts.tv_sec * 1000 + hdr->ts.tv_usec / 1000;
+
+  lasttime = pcapif->lasttime;
+  pcapif->lasttime = time;
+  
+
+  if(lasttime == 0) {
+    sys_timeout(1000, timeout, netif);
+  } else {
+    sys_timeout(time - lasttime, timeout, netif);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+pcapif_thread(void *arg)
+{
+  struct netif *netif;
+  struct pcapif *pcapif;
+  netif = arg;
+  pcapif = netif->state;
+
+  while(1) {
+    pcap_loop(pcapif->pd, 1, callback, (u_char *)netif);
+    sys_sem_wait(pcapif->sem);
+    if(pcapif->p != NULL) {
+      netif->input(pcapif->p, netif);
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+void
+pcapif_init(struct netif *netif)
+{
+  struct pcapif *p;
+    
+  p = malloc(sizeof(struct pcapif));
+  netif->state = p;
+  netif->name[0] = 'p';
+  netif->name[1] = 'c';
+  netif->output = pcapif_output;
+
+  p->pd = pcap_open_offline("pcapdump", errbuf);
+  if(p->pd == NULL) {
+    printf("pcapif_init: failed %s\n", errbuf);
+    return;
+  }
+
+  p->sem = sys_sem_new(0);
+  p->p = NULL;
+  p->lasttime = 0; 
+  
+  sys_thread_new(pcapif_thread, netif);
+}
+/*-----------------------------------------------------------------------------------*/
+#endif /* linux */

src/arch/unix/netif/sioslipif.c

@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+#include "lwip/def.h"
+#include "netif/sioslipif.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+#include "lwip/stats.h"
+
+/* The maximum size that an incoming packet can have. */
+#define MAX_SIZE     1500
+
+#define SLIP_END     0300
+#define SLIP_ESC     0333
+#define SLIP_ESC_END 0334
+#define SLIP_ESC_ESC 0335
+
+/* Define those to whatever is needed to send and receive one byte of
+   data. */
+#define SIO_SEND(c) 
+#define SIO_RECV(c) 
+
+static const unsigned char slip_end = SLIP_END, 
+                           slip_esc = SLIP_ESC, 
+                           slip_esc_end = SLIP_ESC_END, 
+                           slip_esc_esc = SLIP_ESC_ESC;
+
+/*-----------------------------------------------------------------------------------*/
+static err_t
+sioslipif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr)
+{
+  struct pbuf *q;
+  int i;
+  unsigned char *ptr;
+  u8_t c;
+  /* Send pbuf out on the serial I/O device. */
+  SIO_SEND(slip_end);
+  
+  for(q = p; q != NULL; q = q->next) {
+    ptr = q->payload;
+    for(i = 0; i < q->len; i++) {
+      c = *ptr++;
+      switch(c) {
+      case SLIP_END:
+        SIO_SEND(slip_esc);
+        SIO_SEND(slip_esc_end);
+        break;
+      case SLIP_ESC:
+        SIO_SEND(slip_esc);
+        SIO_SEND(slip_esc_esc);
+        break;
+      default:
+        SIO_SEND(c);
+        break;
+      }
+    }
+  }
+#ifdef LINK_STATS
+  stats.link.xmit++;
+#endif /* LINK_STATS */  
+  SIO_SEND(slip_end);
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static struct pbuf *
+sioslipif_input(void)
+{
+  u8_t c;
+  struct pbuf *p, *q;
+  int recved;
+  int i;
+  
+  q = p = NULL;
+  recved = i = 0;
+  c = 0;
+  
+  while(1) {
+    SIO_RECV(c);
+    switch(c) {
+    case SLIP_END:
+      if(p == NULL) {
+        return sioslipif_input();
+      }
+      if(recved > 0) {
+        /* Received whole packet. */
+        pbuf_realloc(q, recved);
+#ifdef LINK_STATS
+        stats.link.recv++;
+#endif /* LINK_STATS */         
+        return q;
+      }
+      break;
+    case SLIP_ESC:
+      SIO_RECV(c);
+      switch(c) {
+      case SLIP_ESC_END:
+        c = SLIP_END;
+        break;
+      case SLIP_ESC_ESC:
+        c = SLIP_ESC;
+        break;
+      }
+      /* FALLTHROUGH */
+    default:
+      if(p == NULL) {      
+        p = pbuf_alloc(PBUF_LINK, 128, PBUF_POOL);
+#ifdef LINK_STATS           
+        if(p == NULL) {
+          stats.link.drop++;
+        }
+#endif /* LINK_STATS */                  
+        if(q != NULL) {
+          pbuf_chain(q, p);
+        } else {
+          q = p;
+        }
+      }
+      if(p != NULL && recved < MAX_SIZE) {
+        ((u8_t *)p->payload)[i] = c;
+        recved++;
+        i++;
+        if(i >= p->len) {
+          i = 0;
+          p = NULL;
+        }
+      }
+      break;
+    }
+    
+  }
+  return NULL;
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+sioslipif_loop(void *arg)
+{
+  struct pbuf *p;
+  struct netif *netif;
+
+  netif = arg;
+  while(1) {
+    p = sioslipif_input();    
+    netif->input(p, netif);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sioslipif_init(struct netif *netif)
+{
+  netif->state = NULL;
+  netif->name[0] = 's';
+  netif->name[1] = 'l';
+  netif->output = sioslipif_output;
+
+  sys_thread_new((void *)sioslipif_loop, netif);
+  /* Do some magic to make it possible to receive data from the serial I/O device. */
+}
+/*-----------------------------------------------------------------------------------*/

src/arch/unix/netif/tapif.c

@@ -0,0 +1,355 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+
+
+#include "lwip/debug.h"
+
+#include "lwip/opt.h"
+#include "lwip/def.h"
+#include "lwip/ip.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+
+#include "netif/etharp.h"
+
+#ifdef linux
+#include <sys/ioctl.h>
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#define DEVTAP "/dev/net/tun"
+#else  /* linux */
+#define DEVTAP "/dev/tap0"
+#endif /* linux */
+
+#define IFNAME0 't'
+#define IFNAME1 'p'
+
+static const struct eth_addr ethbroadcast = {{0xff,0xff,0xff,0xff,0xff,0xff}};
+
+struct tapif {
+  struct eth_addr *ethaddr;
+  /* Add whatever per-interface state that is needed here. */
+  int fd;
+};
+
+/* Forward declarations. */
+static void  tapif_input(struct netif *netif);
+static err_t tapif_output(struct netif *netif, struct pbuf *p,
+			       struct ip_addr *ipaddr);
+
+static void tapif_thread(void *data);
+
+/*-----------------------------------------------------------------------------------*/
+static void
+low_level_init(struct netif *netif)
+{
+  struct tapif *tapif;
+  char buf[100];
+
+  tapif = netif->state;
+  
+  /* Obtain MAC address from network interface. */
+
+  /* (We just fake an address...) */
+  tapif->ethaddr->addr[0] = 0x1;
+  tapif->ethaddr->addr[1] = 0x2;
+  tapif->ethaddr->addr[2] = 0x3;
+  tapif->ethaddr->addr[3] = 0x4;
+  tapif->ethaddr->addr[4] = 0x5;
+  tapif->ethaddr->addr[5] = 0x6;
+
+  /* Do whatever else is needed to initialize interface. */
+  
+  tapif->fd = open(DEVTAP, O_RDWR);
+  DEBUGF(TAPIF_DEBUG, ("tapif_init: fd %d\n", tapif->fd));
+  if(tapif->fd == -1) {
+    perror("tapif_init");
+    exit(1);
+  }
+
+#ifdef linux
+  {
+    struct ifreq ifr;
+    memset(&ifr, 0, sizeof(ifr));
+    ifr.ifr_flags = IFF_TAP|IFF_NO_PI;
+    if (ioctl(tapif->fd, TUNSETIFF, (void *) &ifr) < 0) {
+      perror(buf);
+      exit(1);
+    }
+  }
+#endif /* Linux */
+
+  snprintf(buf, sizeof(buf), "ifconfig tap0 inet %d.%d.%d.%d",
+           ip4_addr1(&(netif->gw)),
+           ip4_addr2(&(netif->gw)),
+           ip4_addr3(&(netif->gw)),
+           ip4_addr4(&(netif->gw)));
+  
+  DEBUGF(TAPIF_DEBUG, ("tapif_init: system(\"%s\");\n", buf));
+  system(buf);
+  sys_thread_new(tapif_thread, netif);
+
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * low_level_output():
+ *
+ * Should do the actual transmission of the packet. The packet is
+ * contained in the pbuf that is passed to the function. This pbuf
+ * might be chained.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+
+static err_t
+low_level_output(struct netif *netif, struct pbuf *p)
+{
+  struct pbuf *q;
+  char buf[1500];
+  char *bufptr;
+  struct tapif *tapif;
+
+  tapif = netif->state;
+  
+  /* initiate transfer(); */
+  
+  bufptr = &buf[0];
+  
+  for(q = p; q != NULL; q = q->next) {
+    /* Send the data from the pbuf to the interface, one pbuf at a
+       time. The size of the data in each pbuf is kept in the ->len
+       variable. */    
+    /* send data from(q->payload, q->len); */
+    bcopy(q->payload, bufptr, q->len);
+    bufptr += q->len;
+  }
+
+  /* signal that packet should be sent(); */
+  if(write(tapif->fd, buf, p->tot_len) == -1) {
+    perror("tapif: write");
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * low_level_input():
+ *
+ * Should allocate a pbuf and transfer the bytes of the incoming
+ * packet from the interface into the pbuf.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static struct pbuf *
+low_level_input(struct tapif *tapif)
+{
+  struct pbuf *p, *q;
+  u16_t len;
+  char buf[1500];
+  char *bufptr;
+
+  /* Obtain the size of the packet and put it into the "len"
+     variable. */
+  len = read(tapif->fd, buf, sizeof(buf));
+
+  /*  if(((double)rand()/(double)RAND_MAX) < 0.1) {
+    printf("drop\n");
+    return NULL;
+    }*/
+
+  
+  /* We allocate a pbuf chain of pbufs from the pool. */
+  p = pbuf_alloc(PBUF_LINK, len, PBUF_POOL);
+  
+  if(p != NULL) {
+    /* We iterate over the pbuf chain until we have read the entire
+       packet into the pbuf. */
+    bufptr = &buf[0];
+    for(q = p; q != NULL; q = q->next) {
+      /* Read enough bytes to fill this pbuf in the chain. The
+         avaliable data in the pbuf is given by the q->len
+         variable. */
+      /* read data into(q->payload, q->len); */
+      bcopy(bufptr, q->payload, q->len);
+      bufptr += q->len;
+    }
+    /* acknowledge that packet has been read(); */
+  } else {
+    /* drop packet(); */
+  }
+
+  return p;  
+}
+/*-----------------------------------------------------------------------------------*/
+static void 
+tapif_thread(void *arg)
+{
+  struct netif *netif;
+  struct tapif *tapif;
+  fd_set fdset;
+  int ret;
+  
+  netif = arg;
+  tapif = netif->state;
+  
+  while(1) {
+    FD_ZERO(&fdset);
+    FD_SET(tapif->fd, &fdset);
+
+    /* Wait for a packet to arrive. */
+    ret = select(tapif->fd + 1, &fdset, NULL, NULL, NULL);
+
+    if(ret == 1) {
+      /* Handle incoming packet. */
+      tapif_input(netif);
+    } else if(ret == -1) {
+      perror("tapif_thread: select");
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * tapif_output():
+ *
+ * This function is called by the TCP/IP stack when an IP packet
+ * should be sent. It calls the function called low_level_output() to
+ * do the actuall transmission of the packet.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static err_t
+tapif_output(struct netif *netif, struct pbuf *p,
+		  struct ip_addr *ipaddr)
+{
+  p = etharp_output(netif, ipaddr, p);
+  if(p != NULL) {
+    return low_level_output(netif, p);
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * tapif_input():
+ *
+ * This function should be called when a packet is ready to be read
+ * from the interface. It uses the function low_level_input() that
+ * should handle the actual reception of bytes from the network
+ * interface.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static void
+tapif_input(struct netif *netif)
+{
+  struct tapif *tapif;
+  struct eth_hdr *ethhdr;
+  struct pbuf *p, *q;
+
+
+  tapif = netif->state;
+  
+  p = low_level_input(tapif);
+
+  if(p == NULL) {
+    DEBUGF(TAPIF_DEBUG, ("tapif_input: low_level_input returned NULL\n"));
+    return;
+  }
+  ethhdr = p->payload;
+
+  q = NULL;
+  switch(htons(ethhdr->type)) {
+  case ETHTYPE_IP:
+    DEBUGF(TAPIF_DEBUG, ("tapif_input: IP packet\n"));
+    q = etharp_ip_input(netif, p);
+    pbuf_header(p, -14);
+    netif->input(p, netif);
+    break;
+  case ETHTYPE_ARP:
+    DEBUGF(TAPIF_DEBUG, ("tapif_input: ARP packet\n"));
+    q = etharp_arp_input(netif, tapif->ethaddr, p);
+    break;
+  default:
+    pbuf_free(p);
+    break;
+  }
+  if(q != NULL) {
+    low_level_output(netif, q);
+    pbuf_free(q);
+  }
+
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+arp_timer(void *arg)
+{
+  etharp_tmr();
+  sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler)arp_timer, NULL);
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * tapif_init():
+ *
+ * Should be called at the beginning of the program to set up the
+ * network interface. It calls the function low_level_init() to do the
+ * actual setup of the hardware.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+void
+tapif_init(struct netif *netif)
+{
+  struct tapif *tapif;
+    
+  tapif = mem_malloc(sizeof(struct tapif));
+  netif->state = tapif;
+  netif->name[0] = IFNAME0;
+  netif->name[1] = IFNAME1;
+  netif->output = tapif_output;
+  netif->linkoutput = low_level_output;
+  
+  tapif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
+  
+  low_level_init(netif);
+  etharp_init();
+  
+  sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler)arp_timer, NULL);
+}
+/*-----------------------------------------------------------------------------------*/

src/arch/unix/netif/tunif.c

@@ -0,0 +1,298 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+
+
+#include "lwip/debug.h"
+
+#include "lwip/opt.h"
+#include "lwip/def.h"
+#include "lwip/ip.h"
+#include "lwip/mem.h"
+#include "lwip/netif.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+
+
+#define IFNAME0 't'
+#define IFNAME1 'n'
+
+struct tunif {
+  /* Add whatever per-interface state that is needed here. */
+  int fd;
+};
+
+/* Forward declarations. */
+static void  tunif_input(struct netif *netif);
+static err_t tunif_output(struct netif *netif, struct pbuf *p,
+			       struct ip_addr *ipaddr);
+
+static void tunif_thread(void *data);
+
+/*-----------------------------------------------------------------------------------*/
+static void
+low_level_init(struct netif *netif)
+{
+  struct tunif *tunif;
+  char buf[100];
+
+  tunif = netif->state;
+  
+  /* Obtain MAC address from network interface. */
+
+  /* Do whatever else is needed to initialize interface. */
+  
+  tunif->fd = open("/dev/tun0", O_RDWR);
+  DEBUGF(TUNIF_DEBUG, ("tunif_init: fd %d\n", tunif->fd));
+  if(tunif->fd == -1) {
+    perror("tunif_init");
+    exit(1);
+  }
+  snprintf(buf, sizeof(buf), "ifconfig tun0 inet %d.%d.%d.%d %d.%d.%d.%d",
+           ip4_addr1(&(netif->gw)),
+           ip4_addr2(&(netif->gw)),
+           ip4_addr3(&(netif->gw)),
+           ip4_addr4(&(netif->gw)),
+           ip4_addr1(&(netif->ip_addr)),
+           ip4_addr2(&(netif->ip_addr)),
+           ip4_addr3(&(netif->ip_addr)),
+           ip4_addr4(&(netif->ip_addr)));
+  
+  DEBUGF(TUNIF_DEBUG, ("tunif_init: system(\"%s\");\n", buf));
+  system(buf);
+  sys_thread_new(tunif_thread, netif);
+
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * low_level_output():
+ *
+ * Should do the actual transmission of the packet. The packet is
+ * contained in the pbuf that is passed to the function. This pbuf
+ * might be chained.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+
+static err_t
+low_level_output(struct tunif *tunif, struct pbuf *p)
+{
+  struct pbuf *q;
+  char buf[1500];
+  char *bufptr;
+  
+  /* initiate transfer(); */
+
+  if(((double)rand()/(double)RAND_MAX) < 0.4) {
+    printf("drop\n");
+    return ERR_OK;
+  }
+  
+  
+  bufptr = &buf[0];
+  
+  for(q = p; q != NULL; q = q->next) {
+    /* Send the data from the pbuf to the interface, one pbuf at a
+       time. The size of the data in each pbuf is kept in the ->len
+       variable. */    
+    /* send data from(q->payload, q->len); */
+    bcopy(q->payload, bufptr, q->len);
+    bufptr += q->len;
+  }
+
+  /* signal that packet should be sent(); */
+  if(write(tunif->fd, buf, p->tot_len) == -1) {
+    perror("tunif: write");
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * low_level_input():
+ *
+ * Should allocate a pbuf and transfer the bytes of the incoming
+ * packet from the interface into the pbuf.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static struct pbuf *
+low_level_input(struct tunif *tunif)
+{
+  struct pbuf *p, *q;
+  u16_t len;
+  char buf[1500];
+  char *bufptr;
+
+  /* Obtain the size of the packet and put it into the "len"
+     variable. */
+  len = read(tunif->fd, buf, sizeof(buf));
+
+  /*  if(((double)rand()/(double)RAND_MAX) < 0.1) {
+    printf("drop\n");
+    return NULL;
+    }*/
+
+  
+  /* We allocate a pbuf chain of pbufs from the pool. */
+  p = pbuf_alloc(PBUF_LINK, len, PBUF_POOL);
+  
+  if(p != NULL) {
+    /* We iterate over the pbuf chain until we have read the entire
+       packet into the pbuf. */
+    bufptr = &buf[0];
+    for(q = p; q != NULL; q = q->next) {
+      /* Read enough bytes to fill this pbuf in the chain. The
+         avaliable data in the pbuf is given by the q->len
+         variable. */
+      /* read data into(q->payload, q->len); */
+      bcopy(bufptr, q->payload, q->len);
+      bufptr += q->len;
+    }
+    /* acknowledge that packet has been read(); */
+  } else {
+    /* drop packet(); */
+  }
+
+  return p;  
+}
+/*-----------------------------------------------------------------------------------*/
+static void 
+tunif_thread(void *arg)
+{
+  struct netif *netif;
+  struct tunif *tunif;
+  fd_set fdset;
+  int ret;
+  
+  netif = arg;
+  tunif = netif->state;
+  
+  while(1) {
+    FD_ZERO(&fdset);
+    FD_SET(tunif->fd, &fdset);
+
+    /* Wait for a packet to arrive. */
+    ret = select(tunif->fd + 1, &fdset, NULL, NULL, NULL);
+
+    if(ret == 1) {
+      /* Handle incoming packet. */
+      tunif_input(netif);
+    } else if(ret == -1) {
+      perror("tunif_thread: select");
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * tunif_output():
+ *
+ * This function is called by the TCP/IP stack when an IP packet
+ * should be sent. It calls the function called low_level_output() to
+ * do the actuall transmission of the packet.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static err_t
+tunif_output(struct netif *netif, struct pbuf *p,
+		  struct ip_addr *ipaddr)
+{
+  struct tunif *tunif;
+
+  tunif = netif->state;
+
+  return low_level_output(tunif, p);
+
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * tunif_input():
+ *
+ * This function should be called when a packet is ready to be read
+ * from the interface. It uses the function low_level_input() that
+ * should handle the actual reception of bytes from the network
+ * interface.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+static void
+tunif_input(struct netif *netif)
+{
+  struct tunif *tunif;
+  struct pbuf *p;
+
+
+  tunif = netif->state;
+  
+  p = low_level_input(tunif);
+
+  if(p == NULL) {
+    DEBUGF(TUNIF_DEBUG, ("tunif_input: low_level_input returned NULL\n"));
+    return;
+  }
+
+  if(ip_lookup(p->payload, netif)) {
+    netif->input(p, netif);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+/*
+ * tunif_init():
+ *
+ * Should be called at the beginning of the program to set up the
+ * network interface. It calls the function low_level_init() to do the
+ * actual setup of the hardware.
+ *
+ */
+/*-----------------------------------------------------------------------------------*/
+void
+tunif_init(struct netif *netif)
+{
+  struct tunif *tunif;
+    
+  tunif = mem_malloc(sizeof(struct tunif));
+  netif->state = tunif;
+  netif->name[0] = IFNAME0;
+  netif->name[1] = IFNAME1;
+  netif->output = tunif_output;
+  
+  
+  low_level_init(netif);
+}
+/*-----------------------------------------------------------------------------------*/

src/arch/unix/netif/unixif.c

@@ -0,0 +1,480 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/debug.h"
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+
+#include "lwip/stats.h"
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "netif/unixif.h"
+#include "lwip/sys.h"
+
+#include "lwip/list.h"
+
+#include "netif/tcpdump.h"
+
+#define UNIXIF_BPS 512000
+#define UNIXIF_QUEUELEN 6
+/*#define UNIXIF_DROP_FIRST      */
+
+struct unixif_buf {
+  struct pbuf *p;
+  unsigned short len, tot_len;
+  void *payload;  
+};
+
+struct unixif {
+  int fd;
+  sys_sem_t sem;
+  struct list *q;
+};
+
+
+/*-----------------------------------------------------------------------------------*/
+static int
+unix_socket_client(char *name)
+{
+  int fd, len;
+  struct sockaddr_un unix_addr;
+
+                                /* create a Unix domain stream socket */
+  if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+    perror("unixif: unix_socket_client: socket");
+    return(-1);
+  }
+  
+                                /* fill socket address structure w/our address */
+  memset(&unix_addr, 0, sizeof(unix_addr));
+  unix_addr.sun_family = AF_UNIX;
+  sprintf(unix_addr.sun_path, "%s%05d", "/var/tmp/", getpid());
+#ifndef linux
+  len = sizeof(unix_addr.sun_len) + sizeof(unix_addr.sun_family) +
+    strlen(unix_addr.sun_path) + 1;
+  unix_addr.sun_len = len;
+#else
+  len = sizeof(unix_addr.sun_family) +
+    strlen(unix_addr.sun_path) + 1;
+#endif /* linux */
+  
+  unlink(unix_addr.sun_path);             /* in case it already exists */
+  if(bind(fd, (struct sockaddr *) &unix_addr,
+	   sizeof(struct sockaddr_un)) < 0) {
+    perror("unixif: unix_socket_client: socket");
+    return(-1);
+  }
+  if(chmod(unix_addr.sun_path, S_IRWXU | S_IRWXO) < 0) {
+    perror("unixif: unix_socket_client: socket");
+    return(-1);
+  }
+  
+                                /* fill socket address structure w/server's addr */
+  memset(&unix_addr, 0, sizeof(unix_addr));
+  unix_addr.sun_family = AF_UNIX;
+  strcpy(unix_addr.sun_path, name);
+#ifndef linux
+  len = sizeof(unix_addr.sun_len) + sizeof(unix_addr.sun_family) +
+    strlen(unix_addr.sun_path) + 1;  
+  unix_addr.sun_len = len;
+#else
+  len = sizeof(unix_addr.sun_family) + strlen(unix_addr.sun_path) + 1;    
+#endif /* linux */
+  if(connect(fd, (struct sockaddr *) &unix_addr,
+	     sizeof(struct sockaddr_un)) < 0) {
+    perror("unixif: unix_socket_client: socket");
+    return(-1);
+  }
+  return(fd);
+}
+
+/*-----------------------------------------------------------------------------------*/
+static int
+unix_socket_server(char *name)
+{
+  int fd, len;
+  struct sockaddr_un unix_addr;
+
+  /* create a Unix domain stream socket */
+  if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+    perror("unixif: unix_socket_server: socket");
+    return(-1);
+  }
+  
+  unlink(name);   /* in case it already exists */
+  
+  /* fill in socket address structure */
+  memset(&unix_addr, 0, sizeof(unix_addr));
+  unix_addr.sun_family = AF_UNIX;
+  strcpy(unix_addr.sun_path, name);
+#ifndef linux
+  len = sizeof(unix_addr.sun_len) + sizeof(unix_addr.sun_family) +
+    strlen(unix_addr.sun_path) + 1;
+  unix_addr.sun_len = len;
+#else
+  len = sizeof(unix_addr.sun_family) +
+    strlen(unix_addr.sun_path) + 1;
+#endif /* linux */
+  
+  /* bind the name to the descriptor */
+  if(bind(fd, (struct sockaddr *) &unix_addr,
+	   sizeof(struct sockaddr_un)) < 0) {
+    perror("unixif: unix_socket_server: bind");
+    return(-1);
+  }
+
+  if(chmod(unix_addr.sun_path, S_IRWXU | S_IRWXO) < 0) {
+    perror("unixif: unix_socket_server: chmod");
+    return(-1);
+  }
+
+
+  if(listen(fd, 5) < 0) {  /* tell kernel we're a server */
+    perror("unixif: unix_socket_server: listen");
+    return(-1);
+  }
+  
+  return(fd);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+unixif_input_handler(void *data)
+{
+  struct netif *netif;
+  struct unixif *unixif;
+  char buf[4096], *bufptr;
+  int len, plen, rlen;
+  struct pbuf *p, *q;
+
+  netif = data;
+  unixif = netif->state;
+
+  len = read(unixif->fd, &plen, sizeof(int));
+  if(len == -1) {
+    perror("unixif_irq_handler: read");
+    abort();
+  }
+
+  DEBUGF(UNIXIF_DEBUG, ("unixif_irq_handler: len == %d plen == %d bytes\n", len, plen));  
+  if(len == sizeof(int)) {
+
+    if(plen < 20 || plen > 1500) {
+      DEBUGF(UNIXIF_DEBUG, ("plen %d!\n", plen));
+      return;
+    }
+
+    len = read(unixif->fd, buf, plen);
+    if(len == -1) {
+      perror("unixif_irq_handler: read");
+      abort();
+    }
+    DEBUGF(UNIXIF_DEBUG, ("unixif_irq_handler: read %d bytes\n", len));
+    p = pbuf_alloc(PBUF_LINK, len, PBUF_POOL);
+    
+    if(p != NULL) {
+      rlen = len;
+      bufptr = buf;
+      q = p;
+      while(rlen > 0) {
+        bcopy(bufptr, q->payload, rlen > q->len? q->len: rlen);
+        rlen -= q->len;
+        bufptr += q->len;
+        q = q->next;
+      }
+      pbuf_realloc(p, len);
+#ifdef LINK_STATS
+      stats.link.recv++;
+#endif /* LINK_STATS */
+      tcpdump(p);
+      netif->input(p, netif);
+    } else {
+      DEBUGF(UNIXIF_DEBUG, ("unixif_irq_handler: could not allocate pbuf\n"));
+    }
+      
+
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static void 
+unixif_thread(void *arg)
+{
+  struct netif *netif;
+  struct unixif *unixif;
+  
+  DEBUGF(UNIXIF_DEBUG, ("unixif_thread: started.\n"));
+
+  netif = arg;
+  unixif = netif->state;
+
+
+  while(1) {
+    sys_sem_wait(unixif->sem);
+    unixif_input_handler(netif);
+  }
+  
+}
+/*-----------------------------------------------------------------------------------*/
+static void 
+unixif_thread2(void *arg)
+{
+  struct netif *netif;
+  struct unixif *unixif;
+  fd_set fdset;
+  
+  DEBUGF(UNIXIF_DEBUG, ("unixif_thread2: started.\n"));
+
+  netif = arg;
+  unixif = netif->state;
+
+  while(1) {
+    FD_ZERO(&fdset);
+    FD_SET(unixif->fd, &fdset);
+  
+    if(select(unixif->fd + 1, &fdset, NULL, NULL, NULL) > 0) {
+      sys_sem_signal(unixif->sem);
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static void unixif_output_timeout(void *arg);
+
+static err_t
+unixif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr)
+{
+  struct unixif *unixif;
+  struct unixif_buf *buf;
+  unixif = netif->state;
+
+  buf = malloc(sizeof(struct unixif_buf));
+  buf->p = p;
+  buf->len = p->len;
+  buf->tot_len = p->tot_len;
+  buf->payload = p->payload;
+
+  if(list_elems(unixif->q) == 0) {
+    pbuf_ref(p);
+    list_push(unixif->q, buf);
+    sys_timeout((double)p->tot_len * 8000.0 / UNIXIF_BPS, unixif_output_timeout,
+		netif);
+
+    DEBUGF(UNIXIF_DEBUG, ("unixif_output: first on list\n"));
+    
+  } else {
+    pbuf_ref(p);
+    if(list_push(unixif->q, buf) == 0) {
+#ifdef UNIXIF_DROP_FIRST
+      struct unixif_buf *buf2;
+      
+      buf2 = list_pop(unixif->q);
+      pbuf_free(buf2->p);
+      free(buf2);
+      list_push(unixif->q, buf);
+#else
+      free(buf);
+      pbuf_free(p);
+      
+      DEBUGF(UNIXIF_DEBUG, ("unixif_output: drop\n"));
+      
+#endif /* UNIXIF_DROP_FIRST */
+#ifdef LINK_STATS
+      stats.link.drop++;
+#endif /* LINK_STATS */
+
+    } else {
+      DEBUGF(UNIXIF_DEBUG, ("unixif_output: on list\n"));
+    }
+
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+unixif_output_timeout(void *arg)
+{  
+  struct pbuf *p, *q;  
+  int i, j, len;
+  unsigned short plen, ptot_len;
+  struct unixif_buf *buf;
+  void *payload;
+  struct netif *netif;
+  struct unixif *unixif;
+  char *data;
+
+  netif = arg;
+  unixif = netif->state;
+
+  DEBUGF(UNIXIF_DEBUG, ("unixif_output_timeout\n"));
+
+  /*  buf = unixif->q[0];
+  unixif->q[0] = unixif->q[1];
+  unixif->q[1] = NULL;*/
+  buf = list_pop(unixif->q);
+  
+  p = buf->p;
+
+  plen = p->len;
+  ptot_len = p->tot_len;
+  payload = p->payload;
+  
+  p->len = buf->len;
+  p->tot_len = buf->tot_len;
+  p->payload = buf->payload;
+  
+  
+  if(p->tot_len == 0) {
+
+    DEBUGF(UNIXIF_DEBUG, ("p->len!\n"));
+    abort();
+  }
+  data = malloc(p->tot_len);
+
+  i = 0;
+  for(q = p; q != NULL; q = q->next) {
+    for(j = 0; j < q->len; j++) {
+      data[i] = ((char *)q->payload)[j];
+      i++;
+    }
+  }
+
+  DEBUGF(UNIXIF_DEBUG, ("unixif_output: sending %d (%d) bytes\n",
+			p->len, p->tot_len));
+  
+  len = p->tot_len;
+  if(write(unixif->fd, &len, sizeof(int)) == -1) {
+    perror("unixif_output: write");
+    abort();
+  }
+    
+  if(write(unixif->fd, data, p->tot_len) == -1) {
+    perror("unixif_output: write");
+    abort();
+  }
+  tcpdump(p);
+#ifdef LINK_STATS
+  stats.link.xmit++;
+#endif /* LINK_STATS */
+
+  free(data);
+  free(buf);
+  p->len = plen;
+  p->tot_len = ptot_len;
+  p->payload = payload;
+
+  pbuf_free(p);
+    
+  /*  if(unixif->q[0] != NULL) {
+    sys_timeout(unixif->q[0]->tot_len * 8000 / UNIXIF_BPS,
+		unixif_output_timeout, netif);
+		}*/
+  if(list_elems(unixif->q) > 0) {
+    sys_timeout(((struct unixif_buf *)list_first(unixif->q))->tot_len *
+		8000.0 / UNIXIF_BPS,
+		unixif_output_timeout, netif);
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+void
+unixif_init_server(struct netif *netif)
+{
+  int fd, fd2;
+  struct sockaddr_un addr;
+  socklen_t len;
+  struct unixif *unixif;
+
+  fd = unix_socket_server("/tmp/unixif");
+
+  if(fd == -1) {
+    perror("unixif_server");
+    abort();
+  }
+  DEBUGF(UNIXIF_DEBUG, ("unixif_server: fd %d\n", fd));
+    
+  unixif = malloc(sizeof(struct unixif));
+  netif->state = unixif;
+  netif->name[0] = 'u';
+  netif->name[1] = 'n';
+  netif->output = unixif_output;
+  unixif->q = list_new(UNIXIF_QUEUELEN);
+
+  printf("Now run ./simnode.\n");
+  len = sizeof(addr);
+  fd2 = accept(fd, (struct sockaddr *)&addr, &len);
+  
+  if(fd2 == -1) {
+    perror("unixif_accept");
+    abort();
+  } 
+
+  DEBUGF(UNIXIF_DEBUG, ("unixif_accept: %d\n", fd2));
+
+  unixif->fd = fd2;
+  unixif->sem = sys_sem_new(0);
+  sys_thread_new(unixif_thread, netif);
+  sys_thread_new(unixif_thread2, netif);
+}
+/*-----------------------------------------------------------------------------------*/
+void
+unixif_init_client(struct netif *netif)
+{
+  struct unixif *unixif;
+  unixif = malloc(sizeof(struct unixif));
+  netif->state = unixif;
+  netif->name[0] = 'u';
+  netif->name[1] = 'n';
+  netif->output = unixif_output;
+  
+  unixif->fd = unix_socket_client("/tmp/unixif");
+  if(unixif->fd == -1) {
+    perror("unixif_init");
+    abort();
+  }
+  unixif->q = list_new(UNIXIF_QUEUELEN);
+  unixif->sem = sys_sem_new(0);
+  sys_thread_new(unixif_thread, netif);
+  sys_thread_new(unixif_thread2, netif);
+}
+/*-----------------------------------------------------------------------------------*/
+
+

src/arch/unix/perf.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "arch/perf.h"
+
+#include <stdio.h>
+
+static FILE *f;
+
+void
+perf_print(unsigned long c1l, unsigned long c1h,
+	   unsigned long c2l, unsigned long c2h,
+	   char *key)
+{
+  unsigned long long start, end;
+
+  start = (unsigned long long)c2h << 32 | c2l;
+  end = (unsigned long long)c1h << 32 | c1l;
+  fprintf(f, "%s: %llu\n", key, start - end);
+  fflush(NULL);
+}
+
+void
+perf_print_times(struct tms *start, struct tms *end, char *key)
+{
+  fprintf(f, "%s: %lu\n", key, end->tms_stime - start->tms_stime);
+  fflush(NULL);  
+}
+
+void
+perf_init(char *fname)
+{
+  f = fopen(fname, "w");  
+}
+	

src/arch/unix/sys_arch.c

@@ -0,0 +1,453 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/*
+ * Wed Apr 17 16:05:29 EDT 2002 (James Roth)
+ *
+ *  - Fixed an unlikely sys_thread_new() race condition.
+ *
+ *  - Made current_thread() work with threads which where
+ *    not created with sys_thread_new().  This includes
+ *    the main thread and threads made with pthread_create().
+ *
+ *  - Catch overflows where more than SYS_MBOX_SIZE messages
+ *    are waiting to be read.  The sys_mbox_post() routine
+ *    will block until there is more room instead of just
+ *    leaking messages.
+ */
+#include "lwip/debug.h"
+
+#include <errno.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pthread.h>
+
+#include "lwip/sys.h"
+#include "lwip/opt.h"
+#include "lwip/stats.h"
+
+#define UMAX(a, b)      ((a) > (b) ? (a) : (b))
+
+static struct sys_thread *threads = NULL;
+static pthread_mutex_t threads_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+struct sys_mbox_msg {
+  struct sys_mbox_msg *next;
+  void *msg;
+};
+
+#define SYS_MBOX_SIZE 128
+
+struct sys_mbox {
+  int first, last;
+  void *msgs[SYS_MBOX_SIZE];
+  struct sys_sem *mail;
+  struct sys_sem *mutex;
+  int wait_send;
+};
+
+struct sys_sem {
+  unsigned int c;
+  pthread_cond_t cond;
+  pthread_mutex_t mutex;
+};
+
+struct sys_thread {
+  struct sys_thread *next;
+  struct sys_timeouts timeouts;
+  pthread_t pthread;
+};
+
+
+static struct timeval starttime;
+
+static struct sys_sem *sys_sem_new_(u8_t count);
+static void sys_sem_free_(struct sys_sem *sem);
+
+static u16_t cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex,
+		       u16_t timeout);
+
+/*-----------------------------------------------------------------------------------*/
+static struct sys_thread * 
+introduce_thread(pthread_t id)
+{
+  struct sys_thread *thread;
+  
+  thread = malloc(sizeof(struct sys_thread));
+    
+  if(thread) {
+    pthread_mutex_lock(&threads_mutex);
+    thread->next = threads;
+    thread->timeouts.next = NULL;
+    thread->pthread = id;
+    threads = thread;
+    pthread_mutex_unlock(&threads_mutex);
+  }
+    
+  return thread;
+}
+/*-----------------------------------------------------------------------------------*/
+static struct sys_thread *
+current_thread(void)
+{
+  struct sys_thread *st;
+  pthread_t pt;
+  pt = pthread_self();
+  pthread_mutex_lock(&threads_mutex);
+
+  for(st = threads; st != NULL; st = st->next) {    
+    if(pthread_equal(st->pthread, pt)) {
+      pthread_mutex_unlock(&threads_mutex);
+      
+      return st;
+    }
+  }
+
+  pthread_mutex_unlock(&threads_mutex);
+
+  st = introduce_thread(pt);
+
+  if(!st) {
+    printf("current_thread???\n");
+    abort();
+  }
+
+  return st;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_thread_new(void (*function)(void *arg), void *arg)
+{
+  int code;
+  pthread_t tmp;
+  struct sys_thread *st = NULL;
+  
+  code = pthread_create(&tmp,
+			NULL, 
+			(void *(*)(void *)) 
+			function, 
+			arg);
+  
+  if(0 == code) {
+    st = introduce_thread(tmp);
+  }
+  
+  if(NULL == st) {
+    DEBUGF(SYS_DEBUG, ("sys_thread_new: pthread_create %d, st = 0x%x",
+		       code, (int)st));
+    abort();
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+struct sys_mbox *
+sys_mbox_new()
+{
+  struct sys_mbox *mbox;
+  
+  mbox = malloc(sizeof(struct sys_mbox));
+  mbox->first = mbox->last = 0;
+  mbox->mail = sys_sem_new_(0);
+  mbox->mutex = sys_sem_new_(1);
+  mbox->wait_send = 0;
+  
+#ifdef SYS_STATS
+  stats.sys.mbox.used++;
+  if(stats.sys.mbox.used > stats.sys.mbox.max) {
+    stats.sys.mbox.max = stats.sys.mbox.used;
+  }
+#endif /* SYS_STATS */
+  
+  return mbox;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_mbox_free(struct sys_mbox *mbox)
+{
+  if(mbox != SYS_MBOX_NULL) {
+#ifdef SYS_STATS
+    stats.sys.mbox.used--;
+#endif /* SYS_STATS */
+    sys_sem_wait(mbox->mutex);
+    
+    sys_sem_free_(mbox->mail);
+    sys_sem_free_(mbox->mutex);
+    mbox->mail = mbox->mutex = NULL;
+    /*  DEBUGF("sys_mbox_free: mbox 0x%lx\n", mbox); */
+    free(mbox);
+  }
+}
+
+/*-----------------------------------------------------------------------------------*/
+void
+sys_mbox_post(struct sys_mbox *mbox, void *msg)
+{
+  u8_t first;
+  
+  sys_sem_wait(mbox->mutex);
+  
+  DEBUGF(SYS_DEBUG, ("sys_mbox_post: mbox %p msg %p\n", mbox, msg));
+  
+  while((mbox->last + 1) >= (mbox->first + SYS_MBOX_SIZE)) {
+    mbox->wait_send++;
+    sys_sem_signal(mbox->mutex);
+    sys_arch_sem_wait(mbox->mail, 0);
+    sys_arch_sem_wait(mbox->mutex, 0);
+    mbox->wait_send--;
+  }
+  
+  mbox->msgs[mbox->last % SYS_MBOX_SIZE] = msg;
+  
+  if(mbox->last == mbox->first) {
+    first = 1;
+  } else {
+    first = 0;
+  }
+  
+  mbox->last++;
+  
+  if(first) {
+    sys_sem_signal(mbox->mail);
+  }
+
+  sys_sem_signal(mbox->mutex);
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+sys_arch_mbox_fetch(struct sys_mbox *mbox, void **msg, u16_t timeout)
+{
+  u16_t time = 1;
+  
+  /* The mutex lock is quick so we don't bother with the timeout
+     stuff here. */
+  sys_arch_sem_wait(mbox->mutex, 0);
+
+  while(mbox->first == mbox->last) {
+    sys_sem_signal(mbox->mutex);
+    
+    /* We block while waiting for a mail to arrive in the mailbox. We
+       must be prepared to timeout. */
+    if(timeout != 0) {
+      time = sys_arch_sem_wait(mbox->mail, timeout);
+      
+      /* If time == 0, the sem_wait timed out, and we return 0. */
+      if(time == 0) {
+	return 0;
+      }
+    } else {
+      sys_arch_sem_wait(mbox->mail, 0);
+    }
+    
+    sys_arch_sem_wait(mbox->mutex, 0);
+  }
+
+  DEBUGF(SYS_DEBUG, ("sys_mbox_fetch: mbox %p msg %p\n", mbox, *msg));
+
+  if(msg != NULL) {
+    *msg = mbox->msgs[mbox->first % SYS_MBOX_SIZE];
+  }
+
+  mbox->first++;
+  
+  if(mbox->wait_send) {
+    sys_sem_signal(mbox->mail);
+  }
+
+  sys_sem_signal(mbox->mutex);
+
+  return time;
+}
+/*-----------------------------------------------------------------------------------*/
+struct sys_sem *
+sys_sem_new(u8_t count)
+{
+#ifdef SYS_STATS
+  stats.sys.sem.used++;
+  if(stats.sys.sem.used > stats.sys.sem.max) {
+    stats.sys.sem.max = stats.sys.sem.used;
+  }
+#endif /* SYS_STATS */
+  return sys_sem_new_(count);
+}
+
+/*-----------------------------------------------------------------------------------*/
+static struct sys_sem *
+sys_sem_new_(u8_t count)
+{
+  struct sys_sem *sem;
+  
+  sem = malloc(sizeof(struct sys_sem));
+  sem->c = count;
+  
+  pthread_cond_init(&(sem->cond), NULL);
+  pthread_mutex_init(&(sem->mutex), NULL);
+  
+  return sem;
+}
+
+/*-----------------------------------------------------------------------------------*/
+static u16_t
+cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex, u16_t timeout)
+{
+  int tdiff;
+  unsigned long sec, usec;
+  struct timeval rtime1, rtime2;
+  struct timespec ts;
+  struct timezone tz;
+  int retval;
+  
+  if(timeout > 0) {
+    /* Get a timestamp and add the timeout value. */
+    gettimeofday(&rtime1, &tz);
+    sec = rtime1.tv_sec;
+    usec = rtime1.tv_usec;
+    usec += timeout % 1000 * 1000;
+    sec += (int)(timeout / 1000) + (int)(usec / 1000000);
+    usec = usec % 1000000;
+    ts.tv_nsec = usec * 1000;
+    ts.tv_sec = sec;
+    
+    retval = pthread_cond_timedwait(cond, mutex, &ts);
+    
+    if(retval == ETIMEDOUT) {
+      return 0;
+    } else {
+      /* Calculate for how long we waited for the cond. */
+      gettimeofday(&rtime2, &tz);
+      tdiff = (rtime2.tv_sec - rtime1.tv_sec) * 1000 +
+	(rtime2.tv_usec - rtime1.tv_usec) / 1000;
+      
+      if(tdiff <= 0) {
+	return 1;
+      }
+      
+      return tdiff;
+    }
+  } else {
+    pthread_cond_wait(cond, mutex);
+    return 0;
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+u16_t
+sys_arch_sem_wait(struct sys_sem *sem, u16_t timeout)
+{
+  u16_t time = 1;
+  
+  pthread_mutex_lock(&(sem->mutex));
+  while(sem->c <= 0) {
+    if(timeout > 0) {
+      time = cond_wait(&(sem->cond), &(sem->mutex), timeout);
+      
+      if(time == 0) {
+	pthread_mutex_unlock(&(sem->mutex));
+	return 0;
+      }
+      /*      pthread_mutex_unlock(&(sem->mutex));
+	      return time; */
+    } else {
+      cond_wait(&(sem->cond), &(sem->mutex), 0);
+    }
+  }
+  sem->c--;
+  pthread_mutex_unlock(&(sem->mutex));
+  return time;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_sem_signal(struct sys_sem *sem)
+{
+  pthread_mutex_lock(&(sem->mutex));
+  sem->c++;
+
+  if(sem->c > 1) {
+    sem->c = 1;
+  }
+
+  pthread_cond_broadcast(&(sem->cond));
+  pthread_mutex_unlock(&(sem->mutex));
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_sem_free(struct sys_sem *sem)
+{
+  if(sem != SYS_SEM_NULL) {
+#ifdef SYS_STATS
+    stats.sys.sem.used--;
+#endif /* SYS_STATS */
+    sys_sem_free_(sem);
+  }
+}
+
+/*-----------------------------------------------------------------------------------*/
+static void
+sys_sem_free_(struct sys_sem *sem)
+{
+  pthread_cond_destroy(&(sem->cond));
+  pthread_mutex_destroy(&(sem->mutex));
+  free(sem);
+}
+/*-----------------------------------------------------------------------------------*/
+unsigned long
+sys_unix_now()
+{
+  struct timeval tv;
+  struct timezone tz;
+  long sec, usec;
+  unsigned long msec;
+  gettimeofday(&tv, &tz);
+  
+  sec = tv.tv_sec - starttime.tv_sec;
+  usec = tv.tv_usec - starttime.tv_usec;
+  msec = sec * 1000 + usec / 1000;
+    
+  return msec;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+sys_init()
+{
+  struct timezone tz;
+  gettimeofday(&starttime, &tz);
+}
+/*-----------------------------------------------------------------------------------*/
+struct sys_timeouts *
+sys_arch_timeouts(void)
+{
+  struct sys_thread *thread;
+
+  thread = current_thread();
+  return &thread->timeouts;
+}
+/*-----------------------------------------------------------------------------------*/