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use checksum-on-copy for sending UDP data for LWIP_NETIF_TX_SINGLE_PBUF==1

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This commit is contained in:
goldsimon
2010-05-02 17:25:33 +00:00
parent 108ed3c81a
commit 4b7288e8f4
5 changed files with 78 additions and 14 deletions
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43
src/api/sockets.c
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@@ -52,6 +52,9 @@
#include "lwip/udp.h"
#include "lwip/tcpip.h"
#include "lwip/pbuf.h"
#if LWIP_CHECKSUM_ON_COPY
#include "lwip/inet_chksum.h"
#endif
#include <string.h>
@@ -823,6 +826,12 @@ lwip_sendto(int s, const void *data, size_t size, int flags,
#if LWIP_NETIF_TX_SINGLE_PBUF
p = pbuf_alloc(PBUF_TRANSPORT, short_size, PBUF_RAM);
if (p != NULL) {
#if LWIP_CHECKSUM_ON_COPY
u16_t chksum = 0;
if (sock->conn->type != NETCONN_RAW) {
chksum = LWIP_CHKSUM_COPY(p->payload, data, short_size);
} else
#endif /* LWIP_CHECKSUM_ON_COPY */
MEMCPY(p->payload, data, size);
#else /* LWIP_NETIF_TX_SINGLE_PBUF */
p = pbuf_alloc(PBUF_TRANSPORT, short_size, PBUF_REF);
@@ -836,7 +845,13 @@ lwip_sendto(int s, const void *data, size_t size, int flags,
if (sock->conn->type == NETCONN_RAW) {
err = sock->conn->last_err = raw_sendto(sock->conn->pcb.raw, p, &remote_addr);
} else {
err = sock->conn->last_err = udp_sendto(sock->conn->pcb.udp, p, &remote_addr, ntohs(to_in->sin_port));
#if LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF
err = sock->conn->last_err = udp_sendto_chksum(sock->conn->pcb.udp, p,
&remote_addr, ntohs(to_in->sin_port), 1, chksum);
#else /* LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF */
err = sock->conn->last_err = udp_sendto(sock->conn->pcb.udp, p,
&remote_addr, ntohs(to_in->sin_port));
#endif /* LWIP_CHECKSUM_ON_COPY && LWIP_NETIF_TX_SINGLE_PBUF */
}
UNLOCK_TCPIP_CORE();
@@ -848,16 +863,19 @@ lwip_sendto(int s, const void *data, size_t size, int flags,
#else
/* initialize a buffer */
buf.p = buf.ptr = NULL;
#if LWIP_CHECKSUM_ON_COPY
buf.flags = 0;
#endif /* LWIP_CHECKSUM_ON_COPY */
if (to) {
inet_addr_to_ipaddr(&remote_addr, &to_in->sin_addr);
remote_port = ntohs(to_in->sin_port);
buf.addr = &remote_addr;
buf.port = remote_port;
remote_port = ntohs(to_in->sin_port);
netbuf_fromaddr(&buf) = &remote_addr;
netbuf_fromport(&buf) = remote_port;
} else {
ip_addr_set_zero(&remote_addr);
remote_port = 0;
buf.addr = NULL;
buf.port = 0;
remote_port = 0;
netbuf_fromaddr(&buf) = NULL;
netbuf_fromport(&buf) = 0;
}
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, short_size=%d"U16_F", flags=0x%x to=",
@@ -871,7 +889,16 @@ lwip_sendto(int s, const void *data, size_t size, int flags,
if (netbuf_alloc(&buf, short_size) == NULL) {
err = ERR_MEM;
} else {
err = netbuf_take(&buf, data, short_size);
#if LWIP_CHECKSUM_ON_COPY
if (sock->conn->type != NETCONN_RAW) {
u16_t chksum = LWIP_CHKSUM_COPY(buf.p->payload, data, short_size);
netbuf_set_chksum(&buf, chksum);
err = ERR_OK;
} else
#endif /* LWIP_CHECKSUM_ON_COPY */
{
err = netbuf_take(&buf, data, short_size);
}
}
#else /* LWIP_NETIF_TX_SINGLE_PBUF */
err = netbuf_ref(&buf, data, short_size);