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 <davem@davemloft.net>

diff --git a/include/net/route.h b/include/net/route.h
index 5236236..b140278 100644 (file)
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -108,8 +108,7 @@ extern struct ip_rt_acct __percpu *ip_rt_acct;
 
 struct in_device;
 extern int             ip_rt_init(void);
-extern void            ip_rt_redirect(__be32 old_gw, __be32 dst, __be32 new_gw,
-                                      __be32 src, struct net_device *dev);
+extern void            ip_rt_redirect(struct sk_buff *skb, __be32 new_gw);
 extern void            rt_cache_flush(struct net *net, int how);
 extern void            rt_cache_flush_batch(struct net *net);
 extern struct rtable *__ip_route_output_key(struct net *, struct flowi4 *flp);

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 5885146..70a7935 100644 (file)
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -755,40 +755,16 @@ out_err:
 
 static void icmp_redirect(struct sk_buff *skb)
 {
-       const struct iphdr *iph;
-
-       if (skb->len < sizeof(struct iphdr))
-               goto out_err;
+       if (skb->len < sizeof(struct iphdr)) {
+               ICMP_INC_STATS_BH(dev_net(skb->dev), ICMP_MIB_INERRORS);
+               return;
+       }
 
-       /*
-        *      Get the copied header of the packet that caused the redirect
-        */
        if (!pskb_may_pull(skb, sizeof(struct iphdr)))
-               goto out;
-
-       iph = (const struct iphdr *)skb->data;
-
-       switch (icmp_hdr(skb)->code & 7) {
-       case ICMP_REDIR_NET:
-       case ICMP_REDIR_NETTOS:
-               /*
-                * As per RFC recommendations now handle it as a host redirect.
-                */
-       case ICMP_REDIR_HOST:
-       case ICMP_REDIR_HOSTTOS:
-               ip_rt_redirect(ip_hdr(skb)->saddr, iph->daddr,
-                              icmp_hdr(skb)->un.gateway,
-                              iph->saddr, skb->dev);
-               break;
-       }
+               return;
 
+       ip_rt_redirect(skb, icmp_hdr(skb)->un.gateway);
        icmp_socket_deliver(skb, icmp_hdr(skb)->un.gateway);
-
-out:
-       return;
-out_err:
-       ICMP_INC_STATS_BH(dev_net(skb->dev), ICMP_MIB_INERRORS);
-       goto out;
 }
 
 /*

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a4de87f..f8921b4 100644 (file)
--- 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) ||