From 94206125c4aac32e43c25bfe1b827e7ab993b7dc Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 11 Jul 2012 20:38:08 -0700 Subject: ipv4: Rearrange arguments to ip_rt_redirect() Pass in the SKB rather than just the IP addresses, so that policy and other aspects can reside in ip_rt_redirect() rather then icmp_redirect(). Signed-off-by: David S. Miller --- net/ipv4/route.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) (limited to 'net/ipv4/route.c') diff --git a/net/ipv4/route.c b/net/ipv4/route.c index a4de87f44c30..f8921b448c39 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1292,18 +1292,33 @@ static void ip_do_redirect(struct rtable *rt, __be32 old_gw, __be32 new_gw) } /* called in rcu_read_lock() section */ -void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw, - __be32 saddr, struct net_device *dev) +void ip_rt_redirect(struct sk_buff *skb, __be32 new_gw) { - int s, i; + const struct iphdr *iph = (const struct iphdr *) skb->data; + __be32 old_gw = ip_hdr(skb)->saddr; + __be32 daddr = iph->daddr; + __be32 saddr = iph->saddr; + struct net_device *dev = skb->dev; struct in_device *in_dev = __in_dev_get_rcu(dev); - __be32 skeys[2] = { saddr, 0 }; int ikeys[2] = { dev->ifindex, 0 }; + __be32 skeys[2] = { saddr, 0 }; struct net *net; + int s, i; if (!in_dev) return; + switch (icmp_hdr(skb)->code & 7) { + case ICMP_REDIR_NET: + case ICMP_REDIR_NETTOS: + case ICMP_REDIR_HOST: + case ICMP_REDIR_HOSTTOS: + break; + + default: + return; + } + net = dev_net(dev); if (new_gw == old_gw || !IN_DEV_RX_REDIRECTS(in_dev) || ipv4_is_multicast(new_gw) || ipv4_is_lbcast(new_gw) || -- cgit v1.2.3