Fixed bug #10088: Correctly implemented shutdown at socket level.

src/include/lwip/api.h

@@ -234,6 +234,7 @@ err_t   netconn_send(struct netconn *conn, struct netbuf *buf);
 err_t   netconn_write(struct netconn *conn, const void *dataptr, size_t size,
                       u8_t apiflags);
 err_t   netconn_close(struct netconn *conn);
+err_t   netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx);
 
 #if LWIP_IGMP
 err_t   netconn_join_leave_group(struct netconn *conn, ip_addr_t *multiaddr,

src/include/lwip/api_msg.h

@@ -48,6 +48,10 @@
 extern "C" {
 #endif
 
+#define NETCONN_SHUT_RD   1
+#define NETCONN_SHUT_WR   2
+#define NETCONN_SHUT_RDWR 3
+
 /* IP addresses and port numbers are expected to be in
  * the same byte order as in the corresponding pcb.
  */
@@ -89,6 +93,10 @@ struct api_msg_msg {
     struct {
       u32_t len;
     } r;
+    /** used for do_close (/shutdown) */
+    struct {
+      u8_t shut;
+    } sd;
 #if LWIP_IGMP
     /** used for do_join_leave_group */
     struct {
@@ -144,6 +152,7 @@ void do_recv            ( struct api_msg_msg *msg);
 void do_write           ( struct api_msg_msg *msg);
 void do_getaddr         ( struct api_msg_msg *msg);
 void do_close           ( struct api_msg_msg *msg);
+void do_shutdown        ( struct api_msg_msg *msg);
 #if LWIP_IGMP
 void do_join_leave_group( struct api_msg_msg *msg);
 #endif /* LWIP_IGMP */

src/include/lwip/sockets.h

@@ -279,6 +279,12 @@ typedef struct ip_mreq {
 #define O_NDELAY    1 /* same as O_NONBLOCK, for compatibility */
 #endif
 
+#ifndef SHUT_RD
+  #define SHUT_RD   1
+  #define SHUT_WR   2
+  #define SHUT_RDWR 3
+#endif
+
 /* FD_SET used for lwip_select */
 #ifndef FD_SET
   #undef  FD_SETSIZE