From 1d159e6d7c19d9a232dccc15bca2e4b5f16603d2 Mon Sep 17 00:00:00 2001
From: Florian Hoss <flhoit00@hs-esslingen.de>
Date: Mon, 25 Jul 2022 10:42:07 +0200
Subject: [PATCH] Trying to use hooks

---
 ESPTest/include/lwip_hooks.h |  3 +++
 ESPTest/include/myhook.c     |  9 +++++++++
 ESPTest/include/myhook.h     | 15 +++++++++++++++
 ESPTest/src/main.c           |  8 --------
 4 files changed, 27 insertions(+), 8 deletions(-)
 create mode 100644 ESPTest/include/lwip_hooks.h
 create mode 100644 ESPTest/include/myhook.c
 create mode 100644 ESPTest/include/myhook.h

diff --git a/ESPTest/include/lwip_hooks.h b/ESPTest/include/lwip_hooks.h
new file mode 100644
index 0000000..6f28d23
--- /dev/null
+++ b/ESPTest/include/lwip_hooks.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#define LWIP_HOOK_IP4_INPUT lwip_hook_ip4_input
\ No newline at end of file
diff --git a/ESPTest/include/myhook.c b/ESPTest/include/myhook.c
new file mode 100644
index 0000000..d1cba9b
--- /dev/null
+++ b/ESPTest/include/myhook.c
@@ -0,0 +1,9 @@
+#include "lwip/netif.h"
+#include "lwip/pbuf.h"
+#include "esp_log.h"
+
+int IRAM_ATTR lwip_hook_ip4_input(struct pbuf *pbuf, struct netif *input_netif)
+{
+    ESP_LOGI("HOOK", "Testing...");
+    return 0; // we don't consume the packet
+}
\ No newline at end of file
diff --git a/ESPTest/include/myhook.h b/ESPTest/include/myhook.h
new file mode 100644
index 0000000..c7c8472
--- /dev/null
+++ b/ESPTest/include/myhook.h
@@ -0,0 +1,15 @@
+#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
\ No newline at end of file
diff --git a/ESPTest/src/main.c b/ESPTest/src/main.c
index 4bcc2d9..c34b11b 100644
--- a/ESPTest/src/main.c
+++ b/ESPTest/src/main.c
@@ -16,14 +16,6 @@
 static const char *WIFI_TAG = "wifi station";
 static const char *SERVER_TAG = "http server";
 
-int my_hook(struct pbuf *pbuf, struct netif *input_netif)
-{
-    ESP_LOGI(WIFI_TAG, "TESTING!");
-    return ESP_OK;
-}
-
-#define LWIP_HOOK_IP4_INPUT(pbuf, input_netif) my_hook(pbuf, input_netif)
-
 /* FreeRTOS event group to signal when we are connected*/
 static EventGroupHandle_t s_wifi_event_group;