多网卡应用下，accept创建的socket应该和server使用一样的网卡（默认网卡不一定正确）

components/net/sal_socket/src/sal_socket.c

@@ -619,7 +619,8 @@ int sal_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
             LOG_E("New socket registered failed, return error %d.", retval);
             return -1;
         }
-
+		/* new socket create by accept should have the same netdev with server*/
+		new_sock->netdev = sock->netdev;
         /* socket structure user_data used to store the acquired new socket */
         new_sock->user_data = (void *) new_socket;