From 9c9ae155ba4086e4f75c4d48ef533d6472a71629 Mon Sep 17 00:00:00 2001
From: zwx <zhangwenxu@espressif.com>
Date: Wed, 7 Aug 2024 14:49:16 +0800
Subject: [PATCH] feat(lwip): add a config to set the size of ND6 table cache

---
 components/lwip/Kconfig                 | 21 +++++++++++++++++++++
 components/lwip/port/include/lwipopts.h | 14 ++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/components/lwip/Kconfig b/components/lwip/Kconfig
index 4af717287b..da08253bbd 100644
--- a/components/lwip/Kconfig
+++ b/components/lwip/Kconfig
@@ -898,6 +898,27 @@ menu "LWIP"
         help
             Config max number of entries in IPv6 neighbor cache
 
+    config LWIP_IPV6_ND6_NUM_PREFIXES
+        int "Max number of entries in IPv6 on-link prefixes cache"
+        depends on LWIP_IPV6
+        default 5
+        help
+            Maximum number of entries in IPv6 on-link prefixes cache
+
+    config LWIP_IPV6_ND6_NUM_ROUTERS
+        int "Max number of entries in IPv6 default routers cache"
+        depends on LWIP_IPV6
+        default 3
+        help
+            Maximum number of entries in IPv6 default routers cache
+
+    config LWIP_IPV6_ND6_NUM_DESTINATIONS
+        int "Max number of entries in IPv6 destinations cache"
+        depends on LWIP_IPV6
+        default 10
+        help
+            Maximum number of entries in IPv6 destinations cache
+
     menuconfig LWIP_PPP_SUPPORT
         bool "Enable PPP support"
         default n
diff --git a/components/lwip/port/include/lwipopts.h b/components/lwip/port/include/lwipopts.h
index d150106f81..b58214c373 100644
--- a/components/lwip/port/include/lwipopts.h
+++ b/components/lwip/port/include/lwipopts.h
@@ -1302,6 +1302,20 @@ static inline uint32_t timeout_from_offered(uint32_t lease, uint32_t min)
  */
 #define LWIP_ND6_NUM_NEIGHBORS          CONFIG_LWIP_IPV6_ND6_NUM_NEIGHBORS
 
+/**
+ * LWIP_ND6_NUM_PREFIXES: Maximum number of entries in IPv6 on-link prefixes cache
+ */
+#define LWIP_ND6_NUM_PREFIXES          CONFIG_LWIP_IPV6_ND6_NUM_PREFIXES
+
+/**
+ * LWIP_ND6_NUM_ROUTERS: Maximum number of entries in IPv6 default routers cache
+ */
+#define LWIP_ND6_NUM_ROUTERS          CONFIG_LWIP_IPV6_ND6_NUM_ROUTERS
+
+/**
+ * LWIP_ND6_NUM_DESTINATIONS: Maximum number of entries in IPv6 destinations cache
+ */
+#define LWIP_ND6_NUM_DESTINATIONS          CONFIG_LWIP_IPV6_ND6_NUM_DESTINATIONS
 /*
    ---------------------------------------
    ---------- Hook options ---------------