From b437fc5924d8038af06cec88fa0be5dbcba08412 Mon Sep 17 00:00:00 2001
From: "bernard.xiong" <bernard.xiong@gmail.com>
Date: Sun, 14 Mar 2010 12:47:44 +0000
Subject: [PATCH] discard packet when tcp_input error occurs.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@485 bbd45198-f89e-11dd-88c7-29a3b14d5316
---
 net/lwip/src/netif/ethernetif.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/lwip/src/netif/ethernetif.c b/net/lwip/src/netif/ethernetif.c
index 45eb9df12b..f8d449856f 100644
--- a/net/lwip/src/netif/ethernetif.c
+++ b/net/lwip/src/netif/ethernetif.c
@@ -64,7 +64,11 @@ err_t eth_input(struct pbuf *p, struct netif *inp)
 		case ETHTYPE_IP:
 			etharp_ip_input(inp, p);
 			pbuf_header(p, -((rt_int16_t)sizeof(struct eth_hdr)));
-			tcpip_input(p, inp);
+			if (tcpip_input(p, inp) != ERR_OK)
+			{
+				/* discard packet */
+				pbuf_free(p);
+			}
 			break;
 
 		case ETHTYPE_ARP:
-- 
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