Need to get a new pointer for the IP header after doing a pullup on the mbuf

diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c
index 15db85f..0a7585d 100644 (file)
--- a/sys/netinet/ip_output.c
+++ b/sys/netinet/ip_output.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ip_output.c,v 1.10 1997/03/02 07:32:15 angelos Exp $  */
+/*     $OpenBSD: ip_output.c,v 1.11 1997/03/02 07:59:40 tholo Exp $    */
 /*     $NetBSD: ip_output.c,v 1.28 1996/02/13 23:43:07 christos Exp $  */
 
 /*
@@ -160,10 +160,12 @@ ip_output(m0, va_alist)
                dst->sen_ip_src = ip->ip_src;
                dst->sen_ip_dst = ip->ip_dst;
                dst->sen_proto = ip->ip_p;
-               
-               if ((m->m_len < hlen + 2*sizeof(u_int16_t)) &&
-                   ((m = m_pullup(m, hlen + 2*sizeof(u_int16_t))) == 0))
+
+               if (m->m_len < hlen + 2*sizeof(u_int16_t)) {
+                   if ((m = m_pullup(m, hlen + 2*sizeof(u_int16_t))) == 0)
                        goto bad;
+                   ip = mtod(m, struct ip *);
+               }
 
                switch (ip->ip_p) {
                case IPPROTO_TCP: