From ac302329d15513a9f2b37083061e74659b8516fb Mon Sep 17 00:00:00 2001
From: xueyunfei <xueyunfei@espressif.com>
Date: Thu, 19 Mar 2020 10:44:03 +0800
Subject: [PATCH] optimization TCPv6 connect

---
 components/lwip/lwip                      | 2 +-
 components/lwip/port/esp32/netif/wlanif.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/components/lwip/lwip b/components/lwip/lwip
index dd3b30175..5c181728c 160000
--- a/components/lwip/lwip
+++ b/components/lwip/lwip
@@ -1 +1 @@
-Subproject commit dd3b301750f19c9f15248ac32d366cd41c6b3225
+Subproject commit 5c181728c894d8c051070b1cf21c55a6222fc64b
diff --git a/components/lwip/port/esp32/netif/wlanif.c b/components/lwip/port/esp32/netif/wlanif.c
index 2020a9a22..71eed9dd0 100644
--- a/components/lwip/port/esp32/netif/wlanif.c
+++ b/components/lwip/port/esp32/netif/wlanif.c
@@ -93,6 +93,12 @@ low_level_init(struct netif *netif)
 #endif
 #endif
 
+#if ESP_IPV6
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+  netif->flags |= NETIF_FLAG_MLD6;
+#endif
+#endif
+
 #if !ESP_L2_TO_L3_COPY
   netif->l2_buffer_free_notify = wlanif_free_rx_buf_l2;
 #endif