ipv6: Use icmpv6_notify() to propagate redirect, instead of rt6_redirect().

[linux-2.6-block.git] / net / ipv6 / route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index f52cf83bb1e01d3554a73a2480dd278401be3cc3..7296af144d6cd961e383b9116dd29699e8b28e3b 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1633,92 +1633,6 @@ static int ip6_route_del(struct fib6_config *cfg)
        return err;
 }
 
-/*
- *     Handle redirects
- */
-struct ip6rd_flowi {
-       struct flowi6 fl6;
-       struct in6_addr gateway;
-};
-
-static struct rt6_info *__ip6_route_redirect(struct net *net,
-                                            struct fib6_table *table,
-                                            struct flowi6 *fl6,
-                                            int flags)
-{
-       struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl6;
-       struct rt6_info *rt;
-       struct fib6_node *fn;
-
-       /*
-        * Get the "current" route for this destination and
-        * check if the redirect has come from approriate router.
-        *
-        * RFC 2461 specifies that redirects should only be
-        * accepted if they come from the nexthop to the target.
-        * Due to the way the routes are chosen, this notion
-        * is a bit fuzzy and one might need to check all possible
-        * routes.
-        */
-
-       read_lock_bh(&table->tb6_lock);
-       fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr);
-restart:
-       for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
-               /*
-                * Current route is on-link; redirect is always invalid.
-                *
-                * Seems, previous statement is not true. It could
-                * be node, which looks for us as on-link (f.e. proxy ndisc)
-                * But then router serving it might decide, that we should
-                * know truth 8)8) --ANK (980726).
-                */
-               if (rt6_check_expired(rt))
-                       continue;
-               if (!(rt->rt6i_flags & RTF_GATEWAY))
-                       continue;
-               if (fl6->flowi6_oif != rt->dst.dev->ifindex)
-                       continue;
-               if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway))
-                       continue;
-               break;
-       }
-
-       if (!rt)
-               rt = net->ipv6.ip6_null_entry;
-       BACKTRACK(net, &fl6->saddr);
-out:
-       dst_hold(&rt->dst);
-
-       read_unlock_bh(&table->tb6_lock);
-
-       return rt;
-};
-
-static struct rt6_info *ip6_route_redirect(const struct in6_addr *dest,
-                                          const struct in6_addr *src,
-                                          const struct in6_addr *gateway,
-                                          struct net_device *dev)
-{
-       int flags = RT6_LOOKUP_F_HAS_SADDR;
-       struct net *net = dev_net(dev);
-       struct ip6rd_flowi rdfl = {
-               .fl6 = {
-                       .flowi6_oif = dev->ifindex,
-                       .daddr = *dest,
-                       .saddr = *src,
-               },
-       };
-
-       rdfl.gateway = *gateway;
-
-       if (rt6_need_strict(dest))
-               flags |= RT6_LOOKUP_F_IFACE;
-
-       return (struct rt6_info *)fib6_rule_lookup(net, &rdfl.fl6,
-                                                  flags, __ip6_route_redirect);
-}
-
 static void rt6_do_redirect(struct dst_entry *dst, struct sk_buff *skb)
 {
        struct net *net = dev_net(skb->dev);
@@ -1848,27 +1762,6 @@ out:
        neigh_release(neigh);
 }
 
-void rt6_redirect(struct sk_buff *skb)
-{
-       const struct in6_addr *target;
-       const struct in6_addr *dest;
-       const struct in6_addr *src;
-       const struct in6_addr *saddr;
-       struct icmp6hdr *icmph;
-       struct rt6_info *rt;
-
-       icmph = icmp6_hdr(skb);
-       target = (const struct in6_addr *) (icmph + 1);
-       dest = target + 1;
-
-       src = &ipv6_hdr(skb)->daddr;
-       saddr = &ipv6_hdr(skb)->saddr;
-
-       rt = ip6_route_redirect(dest, src, saddr, skb->dev);
-       rt6_do_redirect(&rt->dst, skb);
-       dst_release(&rt->dst);
-}
-
 /*
  *     Misc support functions
  */