net/tcp:resolve reconnection issues when connection failed due to rejection

After first connection refused happend,The user use the same connection failed,becasue the tcpstateflags is not TCP_ALLOCATED

Signed-off-by: wangchen <wangchen41@xiaomi.com>

net/tcp/tcp.h

@@ -683,6 +683,19 @@ int tcp_bind(FAR struct tcp_conn_s *conn, FAR const struct sockaddr *addr);
 int tcp_connect(FAR struct tcp_conn_s *conn,
                 FAR const struct sockaddr *addr);
 
+/****************************************************************************
+ * Name: tcp_removeconn
+ *
+ * Description:
+ *   remove the connection from the list of active TCP connections
+ *
+ * Assumptions:
+ *   This function is called from network logic with the network locked.
+ *
+ ****************************************************************************/
+
+void tcp_removeconn(FAR struct tcp_conn_s *conn);
+
 /****************************************************************************
  * Name: psock_tcp_connect
  *

net/tcp/tcp_conn.c

@@ -1476,4 +1476,22 @@ errout_with_lock:
   return ret;
 }
 
+/****************************************************************************
+ * Name: tcp_removeconn
+ *
+ * Description:
+ *   remove the connection from the list of active TCP connections
+ *
+ * Assumptions:
+ *   This function is called from network logic with the network locked.
+ *
+ ****************************************************************************/
+
+void tcp_removeconn(FAR struct tcp_conn_s *conn)
+{
+  net_lock();
+  dq_rem(&conn->sconn.node, &g_active_tcp_connections);
+  net_unlock();
+}
+
 #endif /* CONFIG_NET && CONFIG_NET_TCP */

net/tcp/tcp_connect.c

@@ -241,6 +241,12 @@ static uint16_t psock_connect_eventhandler(FAR struct net_driver_s *dev,
 
       ninfo("Resuming: %d\n", pstate->tc_result);
 
+      if (pstate->tc_result != OK)
+        {
+          tcp_removeconn(conn);
+          conn->tcpstateflags = TCP_ALLOCATED;
+        }
+
       /* Stop further callbacks */
 
       psock_teardown_callbacks(pstate, pstate->tc_result);