Basic setup with hook and arduino for esp32

ESP32Firewall/src/CMakeLists.txt

@@ -0,0 +1,6 @@
+# This file was automatically generated for projects
+# without default 'CMakeLists.txt' file.
+
+FILE(GLOB_RECURSE app_sources ${CMAKE_SOURCE_DIR}/src/*.*)
+
+idf_component_register(SRCS ${app_sources})

ESP32Firewall/src/main.cpp

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+#include "Arduino.h"
+#include "theSecrets.h"
+#include "WiFi.h"
+#include "lwip_hooks.h"
+
+int lwip_hook_ip4_input(struct pbuf *pbuf, struct netif *input_netif)
+{
+    const struct ip_hdr *iphdr;
+    char ip_address[IP_HLEN];
+
+    iphdr = (struct ip_hdr *)pbuf->payload;
+    sprintf(ip_address, "%d.%d.%d.%d", ip4_addr1_16_val(iphdr->src), ip4_addr2_16_val(iphdr->src), ip4_addr3_16_val(iphdr->src), ip4_addr4_16_val(iphdr->src));
+    Serial.print((u16_t)IPH_PROTO(iphdr));
+    Serial.print(": ");
+    Serial.println(ip_address);
+    return 0;
+}
+
+void setup()
+{
+    Serial.begin(115200);
+    Serial.println();
+    WiFi.begin(ssid, psk);
+    while (!WiFi.isConnected())
+    {
+        Serial.print(".");
+        delay(200);
+    }
+    Serial.println();
+    Serial.print("[WiFi] IP: ");
+    Serial.println(WiFi.localIP());
+}
+
+void loop()
+{
+    Serial.println("test");
+    sleep(1000);
+}