Add logs for pcb was closed before reaching LwIP task

Author: mathieucarbou

src/AsyncTCP.cpp

@@ -546,6 +546,8 @@ static err_t _tcp_output_api(struct tcpip_api_call_data *api_call_msg) {
   msg->err = ERR_CONN;
   if (msg->closed_slot == INVALID_CLOSED_SLOT || !_closed_slots[msg->closed_slot]) {
     msg->err = tcp_output(msg->pcb);
+  } else {
+    log_e("pcb was closed before reaching LwIP task");
   }
   return msg->err;
 }
@@ -566,6 +568,8 @@ static err_t _tcp_write_api(struct tcpip_api_call_data *api_call_msg) {
   msg->err = ERR_CONN;
   if (msg->closed_slot == INVALID_CLOSED_SLOT || !_closed_slots[msg->closed_slot]) {
     msg->err = tcp_write(msg->pcb, msg->write.data, msg->write.size, msg->write.apiflags);
+  } else {
+    log_e("pcb was closed before reaching LwIP task");
   }
   return msg->err;
 }
@@ -592,6 +596,8 @@ static err_t _tcp_recved_api(struct tcpip_api_call_data *api_call_msg) {
     // if(msg->closed_slot != INVALID_CLOSED_SLOT) {
     msg->err = 0;
     tcp_recved(msg->pcb, msg->received);
+  } else {
+    log_e("pcb was closed before reaching LwIP task");
   }
   return msg->err;
 }
@@ -613,6 +619,8 @@ static err_t _tcp_close_api(struct tcpip_api_call_data *api_call_msg) {
   msg->err = ERR_CONN;
   if (msg->closed_slot == INVALID_CLOSED_SLOT || !_closed_slots[msg->closed_slot]) {
     msg->err = tcp_close(msg->pcb);
+  } else {
+    log_e("pcb was closed before reaching LwIP task");
   }
   return msg->err;
 }
@@ -633,6 +641,8 @@ static err_t _tcp_abort_api(struct tcpip_api_call_data *api_call_msg) {
   msg->err = ERR_CONN;
   if (msg->closed_slot == INVALID_CLOSED_SLOT || !_closed_slots[msg->closed_slot]) {
     tcp_abort(msg->pcb);
+  } else {
+    log_e("pcb was closed before reaching LwIP task");
   }
   return msg->err;
 }