From 4b662d1a22752c67221405b360e7822ecc5b344a Mon Sep 17 00:00:00 2001
From: xiehang <xiehang@espressif.com>
Date: Mon, 21 Sep 2020 10:58:43 +0800
Subject: [PATCH 1/2] lw-ip: fix udp tx packet loss issue

---
 components/lwip/lwip | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/lwip/lwip b/components/lwip/lwip
index 5b2072ebb8..602d25c525 160000
--- a/components/lwip/lwip
+++ b/components/lwip/lwip
@@ -1 +1 @@
-Subproject commit 5b2072ebb82e606ed1d0ae1345742716d6499e7e
+Subproject commit 602d25c525cbca272b33736170575c1665613beb

From 4b11a05391197688f8a279901343d79f42e8297d Mon Sep 17 00:00:00 2001
From: ChenJianxing <chenjianxing@espressif.com>
Date: Mon, 20 Jul 2020 21:04:45 +0800
Subject: [PATCH 2/2] lwip: fix IPv6 ND6 queue too much pkts cause no mem issue
 and add menuconfig item for this params.

---
 components/lwip/Kconfig                       | 14 ++++++++++++++
 components/lwip/lwip                          |  2 +-
 components/lwip/port/esp32/include/lwipopts.h | 10 ++++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/components/lwip/Kconfig b/components/lwip/Kconfig
index 6be8f629df..39f33660a1 100644
--- a/components/lwip/Kconfig
+++ b/components/lwip/Kconfig
@@ -587,6 +587,20 @@ menu "LWIP"
             This would in turn fail the configuration for the whole link.
             If your modem is not responding correctly to PPP Phase Network, try to disable IPV6 support.
 
+    config LWIP_IPV6_MEMP_NUM_ND6_QUEUE
+        int "Max number of IPv6 packets to queue during MAC resolution"
+        range 3 20
+        default 3
+        help
+            Config max number of IPv6 packets to queue during MAC resolution.
+
+    config LWIP_IPV6_ND6_NUM_NEIGHBORS
+        int "Max number of entries in IPv6 neighbor cache"
+        range 3 10
+        default 5
+        help
+            Config max number of entries in IPv6 neighbor cache
+
     config LWIP_PPP_NOTIFY_PHASE_SUPPORT
         bool "Enable Notify Phase Callback"
         depends on LWIP_PPP_SUPPORT
diff --git a/components/lwip/lwip b/components/lwip/lwip
index 602d25c525..80d6d19a92 160000
--- a/components/lwip/lwip
+++ b/components/lwip/lwip
@@ -1 +1 @@
-Subproject commit 602d25c525cbca272b33736170575c1665613beb
+Subproject commit 80d6d19a929c6db577fc44a47fdb4acffdd68933
diff --git a/components/lwip/port/esp32/include/lwipopts.h b/components/lwip/port/esp32/include/lwipopts.h
index e2ec70796c..272dd44afa 100644
--- a/components/lwip/port/esp32/include/lwipopts.h
+++ b/components/lwip/port/esp32/include/lwipopts.h
@@ -708,6 +708,16 @@
  */
 #define LWIP_IPV6                       1
 
+/**
+ * MEMP_NUM_ND6_QUEUE: Max number of IPv6 packets to queue during MAC resolution.
+ */
+#define MEMP_NUM_ND6_QUEUE              CONFIG_LWIP_IPV6_MEMP_NUM_ND6_QUEUE
+
+/**
+ * LWIP_ND6_NUM_NEIGHBORS: Number of entries in IPv6 neighbor cache
+ */
+#define LWIP_ND6_NUM_NEIGHBORS          CONFIG_LWIP_IPV6_ND6_NUM_NEIGHBORS
+
 /*
    ---------------------------------------
    ---------- Hook options ---------------