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From: Kip Macy <kmacy@FreeBSD.org>
Date: Tue, 16 Dec 2008 02:33:53 +0000 (UTC)
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Subject: svn commit: r186159 - head/sys/netinet6
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Author: kmacy
Date: Tue Dec 16 02:33:53 2008
New Revision: 186159
URL: http://svn.freebsd.org/changeset/base/186159

Log:
  advance tail pointer in nd6_output_lle and check lla_output return against NULL

Modified:
  head/sys/netinet6/nd6.c

Modified: head/sys/netinet6/nd6.c
==============================================================================
--- head/sys/netinet6/nd6.c	Tue Dec 16 02:30:42 2008	(r186158)
+++ head/sys/netinet6/nd6.c	Tue Dec 16 02:33:53 2008	(r186159)
@@ -1407,7 +1407,7 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
 	int newstate = 0;
 	uint16_t router = 0;
 	struct sockaddr_in6 sin6;
-	struct mbuf *chain = NULL;
+	struct mbuf *tail = NULL, *chain = NULL;
 	int static_route = 0;
 
 	IF_AFDATA_UNLOCK_ASSERT(ifp);
@@ -1526,7 +1526,9 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
 					 * just set the 2nd argument as the
 					 * 1st one.
 					 */
-					nd6_output_lle(ifp, ifp, m_hold, L3_ADDR_SIN6(ln), NULL, ln, &chain);
+					nd6_output_lle(ifp, ifp, m_hold, L3_ADDR_SIN6(ln), NULL, ln, &tail);
+					if ((tail != NULL) && chain == (NULL))
+						chain = tail;					
 				}
 				if (chain)
 					memcpy(&sin6, L3_ADDR_SIN6(ln), sizeof(sin6));
@@ -1889,8 +1891,10 @@ nd6_output_lle(struct ifnet *ifp, struct
 	if (lle != NULL) {
 		if (*tail == NULL)
 			*tail = m;
-		else
+		else {			
 			(*tail)->m_nextpkt = m;
+			*tail = m;			
+		}
 		return (error);
 	}
 	if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
@@ -2037,7 +2041,7 @@ nd6_storelladdr(struct ifnet *ifp, struc
 	ln = lla_lookup(LLTABLE6(ifp), 0, dst);
 	IF_AFDATA_UNLOCK(ifp);
 	if ((ln == NULL) || !(ln->la_flags & LLE_VALID)) {
-		if (ln)
+		if (ln != NULL)
 			LLE_RUNLOCK(ln);
 		/* this could happen, if we could not allocate memory */
 		m_freem(m);