fix: Add warning to enable LWIP_NETIF_LOOPBACK to use control socket API

Closes #13659
espressif · May 20, 2024 · 52ca696 · 52ca696
1 parent 54ee9bf
commit 52ca696
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/components/esp_http_server/src/util/ctrl_sock.c b/components/esp_http_server/src/util/ctrl_sock.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2018-2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2018-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -11,13 +11,19 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
+#include "esp_log.h"
 #include "ctrl_sock.h"
 
 /* Control socket, because in some network stacks select can't be woken up any
  * other way
  */
 int cs_create_ctrl_sock(int port)
 {
+#if !CONFIG_LWIP_NETIF_LOOPBACK
+    ESP_LOGE(TAG, "Please enable LWIP_NETIF_LOOPBACK for %s API", __func__);
+    return -1;
+#endif
+
     int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
     if (fd < 0) {
         return -1;