[update] the "event_callback" will be change by RT-Thread dfs.

components/net/lwip-2.0.2/src/api/sockets.c

@@ -531,7 +531,8 @@ lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
     return -1;
   }
   LWIP_ASSERT("invalid socket index", (newsock >= LWIP_SOCKET_OFFSET) && (newsock < NUM_SOCKETS + LWIP_SOCKET_OFFSET));
-  // LWIP_ASSERT("newconn->callback == event_callback", newconn->callback == event_callback);
+  /* RT-Thread has changed callback when using BSD socket API, so remove this assert. */
+  /* LWIP_ASSERT("newconn->callback == event_callback", newconn->callback == event_callback); */
   nsock = &sockets[newsock - LWIP_SOCKET_OFFSET];
 
   /* See event_callback: If data comes in right away after an accept, even

components/net/lwip-2.0.3/src/api/sockets.c

@@ -531,7 +531,8 @@ lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
     return -1;
   }
   LWIP_ASSERT("invalid socket index", (newsock >= LWIP_SOCKET_OFFSET) && (newsock < NUM_SOCKETS + LWIP_SOCKET_OFFSET));
-  LWIP_ASSERT("newconn->callback == event_callback", newconn->callback == event_callback);
+  /* RT-Thread has changed callback when using BSD socket API, so remove this assert. */
+  /* LWIP_ASSERT("newconn->callback == event_callback", newconn->callback == event_callback); */
   nsock = &sockets[newsock - LWIP_SOCKET_OFFSET];
 
   /* See event_callback: If data comes in right away after an accept, even