-/* called in rcu_read_lock() section */
-void ip_rt_redirect(struct sk_buff *skb, __be32 new_gw)
-{
- const struct iphdr *iph = (const struct iphdr *) skb->data;
- __be32 daddr = iph->daddr;
- __be32 saddr = iph->saddr;
- struct net_device *dev = skb->dev;
- int ikeys[2] = { dev->ifindex, 0 };
- __be32 skeys[2] = { saddr, 0 };
- struct net *net;
- int s, i;
-
- net = dev_net(dev);
- for (s = 0; s < 2; s++) {
- for (i = 0; i < 2; i++) {
- unsigned int hash;
- struct rtable __rcu **rthp;
- struct rtable *rt;
-
- hash = rt_hash(daddr, skeys[s], ikeys[i], rt_genid(net));
-
- rthp = &rt_hash_table[hash].chain;
-
- while ((rt = rcu_dereference(*rthp)) != NULL) {
- rthp = &rt->dst.rt_next;
-
- if (rt->rt_key_dst != daddr ||
- rt->rt_key_src != skeys[s] ||
- rt->rt_oif != ikeys[i] ||
- rt_is_input_route(rt) ||
- rt_is_expired(rt) ||
- !net_eq(dev_net(rt->dst.dev), net) ||
- rt->dst.error ||
- rt->dst.dev != dev)
- continue;
-
- ip_do_redirect(&rt->dst, skb);
- }
- }
- }
- return;
-
-}
-