Finally external files working

ESPTest/.vscode/settings.json

@@ -1,5 +1,7 @@
 {
   "files.associations": {
-    "esp_wifi_default.h": "c"
+    "esp_wifi_default.h": "c",
+    "esp_log.h": "c",
+    "lwip_hooks.h": "c"
   }
 }

ESPTest/include/lwip_hooks.h

@@ -1,3 +1,20 @@
-#pragma once
+#ifndef _LWIP_HOOKS_H_
+#define _LWIP_HOOKS_H_
 
-#define LWIP_HOOK_IP4_INPUT lwip_hook_ip4_input
+#include "lwip/netif.h"
+#include "lwip/pbuf.h"
+#include "esp_log.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    int lwip_hook_ip4_input(struct pbuf *pbuf, struct netif *input_netif);
+#define LWIP_HOOK_IP4_INPUT lwip_hook_ip4_input
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LWIP_HOOKS_H_ */

ESPTest/include/myhook.c

@@ -1,9 +0,0 @@
-#include "lwip/netif.h"
-#include "lwip/pbuf.h"
-#include "esp_log.h"
-
-int lwip_hook_ip4_input(struct pbuf *pbuf, struct netif *input_netif)
-{
-    ESP_LOGI("HOOK", "Testing...");
-    return 0; // we don't consume the packet
-}

ESPTest/include/myhook.h

@@ -1,15 +0,0 @@
-#pragma once
-
-#include "lwip/netif.h"
-#include "lwip/pbuf.h"
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-    int lwip_hook_ip4_input(struct pbuf *pbuf, struct netif *input_netif);
-
-#ifdef __cplusplus
-}
-#endif

ESPTest/platformio.ini

@@ -14,4 +14,5 @@ board = az-delivery-devkit-v4
 framework = espidf
 monitor_speed = 115200
 build_flags = 
-    '-DLWIP_HOOK_IP4_INPUT(pbuf, input_netif)=({ESP_LOGI("HOOK","TEST");0;})'
+    '-Iinclude'
+    '-DESP_IDF_LWIP_HOOK_FILENAME="lwip_hooks.h"'

ESPTest/src/lwip_hooks.c

@@ -0,0 +1,7 @@
+#include "lwip_hooks.h"
+
+int lwip_hook_ip4_input(struct pbuf *pbuf, struct netif *input_netif)
+{
+    ESP_LOGI("Hook", "Testing...");
+    return 0;
+}