From 7258e9687b9a1aecfc8ba36c73143914d6660ebd Mon Sep 17 00:00:00 2001
From: Alan Cox <alc@FreeBSD.org>
Date: Sun, 23 Jan 2005 19:43:46 +0000
Subject: [PATCH] Correctly move the packet header in ip_insertoptions().

Reported by: Anupam Chanda
Reviewed by: sam@
MFC after: 2 weeks
---
 sys/netinet/ip_output.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c
index 2d8e88a47e0c..59b8aef45e61 100644
--- a/sys/netinet/ip_output.c
+++ b/sys/netinet/ip_output.c
@@ -1064,11 +1064,12 @@ ip_insertoptions(m, opt, phlen)
 			*phlen = 0;
 			return (m);
 		}
+		M_MOVE_PKTHDR(n, m);
 		n->m_pkthdr.rcvif = (struct ifnet *)0;
 #ifdef MAC
 		mac_create_mbuf_from_mbuf(m, n);
 #endif
-		n->m_pkthdr.len = m->m_pkthdr.len + optlen;
+		n->m_pkthdr.len += optlen;
 		m->m_len -= sizeof(struct ip);
 		m->m_data += sizeof(struct ip);
 		n->m_next = m;