fix(websocket): prevent connection abort on write timeout

Author: surengab

components/esp_websocket_client/esp_websocket_client.c

@@ -666,9 +666,15 @@ static int esp_websocket_client_send_with_exact_opcode(esp_websocket_client_hand
         }
         memcpy(client->tx_buffer, data + widx, need_write);
         // send with ws specific way and specific opcode
+        errno = 0;
         wlen = esp_transport_ws_send_raw(client->transport, opcode, (char *)client->tx_buffer, need_write,
                                          (timeout == portMAX_DELAY) ? -1 : timeout * portTICK_PERIOD_MS);
         if (wlen < 0 || (wlen == 0 && need_write != 0)) {
+            if (wlen == 0 && timeout != portMAX_DELAY && errno == 0) {
+                ret = widx;
+                esp_websocket_free_buf(client, true);
+                goto unlock_and_return;
+            }
             ret = wlen;
             esp_websocket_free_buf(client, true);
             esp_tls_error_handle_t error_handle = esp_transport_get_error_handle(client->transport);