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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2006-03-20 17:04:35 -0800
committerDavid S. Miller <davem@davemloft.net>2006-03-20 17:04:35 -0800
commit8238dd0698b480e432acd955c45f9f907b8d27de (patch)
treeeafb3c6dd86a383e4369cf24dbec295b86050031 /net/ipv6
parentbb133964e036c4aaf773244468d589c024e7b399 (diff)
downloadlinux-8238dd0698b480e432acd955c45f9f907b8d27de.tar.bz2
[IPV6]: ROUTE: Handle finding the next best route in reachability in BACKTRACK().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/route.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index d8f3637952a2..6a068e7f81f1 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: