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Diffstat (limited to 'net/ipv6/ip6_output.c')
-rw-r--r--net/ipv6/ip6_output.c41
1 files changed, 21 insertions, 20 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 5bf70b1442ea..7fefd9998466 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -733,28 +733,29 @@ int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi *fl)
733 if (*dst) { 733 if (*dst) {
734 struct rt6_info *rt = (struct rt6_info*)*dst; 734 struct rt6_info *rt = (struct rt6_info*)*dst;
735 735
736 /* Yes, checking route validity in not connected 736 /* Yes, checking route validity in not connected
737 case is not very simple. Take into account, 737 * case is not very simple. Take into account,
738 that we do not support routing by source, TOS, 738 * that we do not support routing by source, TOS,
739 and MSG_DONTROUTE --ANK (980726) 739 * and MSG_DONTROUTE --ANK (980726)
740 740 *
741 1. If route was host route, check that 741 * 1. If route was host route, check that
742 cached destination is current. 742 * cached destination is current.
743 If it is network route, we still may 743 * If it is network route, we still may
744 check its validity using saved pointer 744 * check its validity using saved pointer
745 to the last used address: daddr_cache. 745 * to the last used address: daddr_cache.
746 We do not want to save whole address now, 746 * We do not want to save whole address now,
747 (because main consumer of this service 747 * (because main consumer of this service
748 is tcp, which has not this problem), 748 * is tcp, which has not this problem),
749 so that the last trick works only on connected 749 * so that the last trick works only on connected
750 sockets. 750 * sockets.
751 2. oif also should be the same. 751 * 2. oif also should be the same.
752 */ 752 */
753
754 if (((rt->rt6i_dst.plen != 128 || 753 if (((rt->rt6i_dst.plen != 128 ||
755 !ipv6_addr_equal(&fl->fl6_dst, &rt->rt6i_dst.addr)) 754 !ipv6_addr_equal(&fl->fl6_dst,
755 &rt->rt6i_dst.addr))
756 && (np->daddr_cache == NULL || 756 && (np->daddr_cache == NULL ||
757 !ipv6_addr_equal(&fl->fl6_dst, np->daddr_cache))) 757 !ipv6_addr_equal(&fl->fl6_dst,
758 np->daddr_cache)))
758 || (fl->oif && fl->oif != (*dst)->dev->ifindex)) { 759 || (fl->oif && fl->oif != (*dst)->dev->ifindex)) {
759 dst_release(*dst); 760 dst_release(*dst);
760 *dst = NULL; 761 *dst = NULL;