From add1652da4f0c461be24168f9799c5662ccfc087 Mon Sep 17 00:00:00 2001
From: ru <ru@FreeBSD.org>
Date: Wed, 1 Nov 2000 11:21:45 +0000
Subject: Wrong checksum used for certain reassembled IP packets before
 diverting.

---
 sys/netinet/ip_input.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'sys/netinet')

diff --git a/sys/netinet/ip_input.c b/sys/netinet/ip_input.c
index 0405b96..beb620b 100644
--- a/sys/netinet/ip_input.c
+++ b/sys/netinet/ip_input.c
@@ -675,7 +675,10 @@ found:
 			HTONS(ip->ip_len);
 			HTONS(ip->ip_off);
 			ip->ip_sum = 0;
-			ip->ip_sum = in_cksum_hdr(ip);
+			if (hlen == sizeof(struct ip))
+				ip->ip_sum = in_cksum_hdr(ip);
+			else
+				ip->ip_sum = in_cksum(m, hlen);
 			NTOHS(ip->ip_off);
 			NTOHS(ip->ip_len);
 			ip->ip_len -= hlen;
-- 
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