From 83b290c2897e0e8c319e2f0ab0b52d3276bfe0c5 Mon Sep 17 00:00:00 2001
From: liuxinaliang <liuxianliang@rt-thread.com>
Date: Sun, 29 Dec 2019 15:35:22 +0800
Subject: [PATCH] [net][lwip] fix lwIP 2.1.0 personalized sign bug

---
 components/net/lwip-2.1.0/src/netif/ethernetif.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/components/net/lwip-2.1.0/src/netif/ethernetif.c b/components/net/lwip-2.1.0/src/netif/ethernetif.c
index f73ed635a1..55ffaa89df 100755
--- a/components/net/lwip-2.1.0/src/netif/ethernetif.c
+++ b/components/net/lwip-2.1.0/src/netif/ethernetif.c
@@ -487,8 +487,13 @@ static err_t eth_netif_device_init(struct netif *netif)
 rt_err_t eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_uint16_t flags)
 {
     struct netif* netif;
-
+#if LWIP_NETIF_HOSTNAME
+#define LWIP_HOSTNAME_LEN 16
+    char *hostname = RT_NULL;
+    netif = (struct netif*) rt_malloc (sizeof(struct netif) + LWIP_HOSTNAME_LEN);
+#else
     netif = (struct netif*) rt_malloc (sizeof(struct netif));
+#endif
     if (netif == RT_NULL)
     {
         rt_kprintf("malloc netif failed\n");
-- 
GitLab