From 8238dd0698b480e432acd955c45f9f907b8d27de Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki Date: Mon, 20 Mar 2006 17:04:35 -0800 Subject: [IPV6]: ROUTE: Handle finding the next best route in reachability in BACKTRACK(). Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- net/ipv6/route.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/route.c b/net/ipv6/route.c index d8f3637..6a068e7 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -414,23 +414,22 @@ void ip6_route_input(struct sk_buff *skb) int strict; int attempts = 3; int err; + int reachable = RT6_SELECT_F_REACHABLE; strict = ipv6_addr_type(&skb->nh.ipv6h->daddr) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL) ? RT6_SELECT_F_IFACE : 0; relookup: read_lock_bh(&rt6_lock); +restart_2: fn = fib6_lookup(&ip6_routing_table, &skb->nh.ipv6h->daddr, &skb->nh.ipv6h->saddr); restart: - rt = fn->leaf; - - rt = rt6_select(&fn->leaf, skb->dev->ifindex, strict | RT6_SELECT_F_REACHABLE); - if (rt == &ip6_null_entry) - rt = rt6_select(&fn->leaf, skb->dev->ifindex, strict); + rt = rt6_select(&fn->leaf, skb->dev->ifindex, strict | reachable); BACKTRACK(); - if ((rt->rt6i_flags & RTF_CACHE)) + if (rt == &ip6_null_entry || + rt->rt6i_flags & RTF_CACHE) goto out; dst_hold(&rt->u.dst); @@ -467,6 +466,10 @@ restart: goto relookup; out: + if (reachable) { + reachable = 0; + goto restart_2; + } dst_hold(&rt->u.dst); read_unlock_bh(&rt6_lock); out2: @@ -483,20 +486,21 @@ struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl) int strict; int attempts = 3; int err; + int reachable = RT6_SELECT_F_REACHABLE; strict = ipv6_addr_type(&fl->fl6_dst) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL) ? RT6_SELECT_F_IFACE : 0; relookup: read_lock_bh(&rt6_lock); +restart_2: fn = fib6_lookup(&ip6_routing_table, &fl->fl6_dst, &fl->fl6_src); restart: - rt = rt6_select(&fn->leaf, fl->oif, strict | RT6_SELECT_F_REACHABLE); - if (rt == &ip6_null_entry) - rt = rt6_select(&fn->leaf, fl->oif, strict); + rt = rt6_select(&fn->leaf, fl->oif, strict | reachable); BACKTRACK(); - if ((rt->rt6i_flags & RTF_CACHE)) + if (rt == &ip6_null_entry || + rt->rt6i_flags & RTF_CACHE) goto out; dst_hold(&rt->u.dst); @@ -533,6 +537,10 @@ restart: goto relookup; out: + if (reachable) { + reachable = 0; + goto restart_2; + } dst_hold(&rt->u.dst); read_unlock_bh(&rt6_lock); out2: -- cgit v1.1