Merge pull request #9331 from VeijoPesonen/bugfix-esp8266_udp_prevent…

…_would_block ESP8266: prevent WOULD BLOCK from TX if UDP
ARMmbed · Jan 17, 2019 · b59b93e · b59b93e
2 parents 694e45f + e9ceff2
commit b59b93e
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/components/wifi/esp8266-driver/ESP8266Interface.cpp b/components/wifi/esp8266-driver/ESP8266Interface.cpp
@@ -508,9 +508,11 @@ int ESP8266Interface::socket_send(void *handle, const void *data, unsigned size)
  } while ((sendStartTime - rtos::Kernel::get_ms_count() < 50)
  && (status != NSAPI_ERROR_OK));
 
- if (status == NSAPI_ERROR_WOULD_BLOCK) {
- debug("Enqueuing the event call");
+ if (status == NSAPI_ERROR_WOULD_BLOCK && socket->proto == NSAPI_TCP) {
+ tr_debug("ESP8266Interface::socket_send(): enqueuing the event call");
  _global_event_queue->call_in(100, callback(this, &ESP8266Interface::event));
+ } else if (status == NSAPI_ERROR_WOULD_BLOCK && socket->proto == NSAPI_UDP) {
+ status = NSAPI_ERROR_DEVICE_ERROR;
  }
 
  return status != NSAPI_ERROR_OK ? status : size;