From c3ad44189532031015c53a048fe3e7390b8bdb14 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 56da539f4d..4c88a19594 100644
--- a/components/lwip/Kconfig
+++ b/components/lwip/Kconfig
@@ -883,6 +883,27 @@ menu "LWIP"
         default 0x1 if LWIP_TCPIP_TASK_AFFINITY_CPU1
 
 
+    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 db4ef60bcf..a959ba1cc3 100644
--- a/components/lwip/port/include/lwipopts.h
+++ b/components/lwip/port/include/lwipopts.h
@@ -1297,6 +1297,20 @@ 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 ---------------