From 13a6c5201d71bde412fa0ea453ad10a6e2ace82c Mon Sep 17 00:00:00 2001
From: kurisaw <2053731441@qq.com>
Date: Thu, 31 Oct 2024 16:48:52 +0800
Subject: [PATCH] [net][lwip] lwip hook functions are provided to provide
 greater flexibility for unknown Ethernet protocols

---
 components/net/lwip/Kconfig         |  4 ++++
 components/net/lwip/port/lwipopts.h | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/components/net/lwip/Kconfig b/components/net/lwip/Kconfig
index 883c14a4d1..48f2a1d86a 100644
--- a/components/net/lwip/Kconfig
+++ b/components/net/lwip/Kconfig
@@ -281,6 +281,10 @@ if RT_USING_LWIP
         endif
     endif
 
+    config RT_LWIP_ENABLE_USER_HOOKS
+        bool "Enable user-defined LWIP hooks"
+        default n
+
     menuconfig RT_LWIP_DEBUG
         bool "Enable lwIP Debugging Options"
         default n
diff --git a/components/net/lwip/port/lwipopts.h b/components/net/lwip/port/lwipopts.h
index 37ed55b8a5..a297af7060 100644
--- a/components/net/lwip/port/lwipopts.h
+++ b/components/net/lwip/port/lwipopts.h
@@ -654,4 +654,15 @@
 #endif
 #endif /* RT_USING_LWIP_VER_NUM >= 0x20000 */
 
+#if RT_LWIP_ENABLE_USER_HOOKS
+/**
+ * This hook provides flexibility for handling unknown Ethernet protocols.
+ * 
+ * For example, you can define how to handle packets of unknown types, 
+ * such as forwarding them to another interface, discarding them, 
+ * or passing them to an application for further processing.
+ */
+#define LWIP_HOOK_UNKNOWN_ETH_PROTOCOL lwip_hook_unknown_eth_protocol
+#endif /* RT_LWIP_ENABLE_USER_HOOKS */
+
 #endif /* __LWIPOPTS_H__ */