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ipv4: Remove route key identity dependencies in ip_rt_get_source().

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Pass in the sk_buff so that we can fetch the necessary keys from
the packet header when working with input routes.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2011-05-13 17:29:41 -04:00
parent 22f728f8f3
commit 8e36360ae8
3 changed files with 21 additions and 17 deletions
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24
net/ipv4/route.c
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@@ -1699,22 +1699,26 @@ static int ip_rt_bug(struct sk_buff *skb)
in IP options!
*/
void ip_rt_get_source(u8 *addr, struct rtable *rt)
void ip_rt_get_source(u8 *addr, struct sk_buff *skb, struct rtable *rt)
{
__be32 src;
struct fib_result res;
if (rt_is_output_route(rt))
src = rt->rt_src;
else {
struct flowi4 fl4 = {
.daddr = rt->rt_key_dst,
.saddr = rt->rt_key_src,
.flowi4_tos = rt->rt_key_tos,
.flowi4_oif = rt->rt_oif,
.flowi4_iif = rt->rt_iif,
.flowi4_mark = rt->rt_mark,
};
struct fib_result res;
struct flowi4 fl4;
struct iphdr *iph;
iph = ip_hdr(skb);
memset(&fl4, 0, sizeof(fl4));
fl4.daddr = iph->daddr;
fl4.saddr = iph->saddr;
fl4.flowi4_tos = iph->tos;
fl4.flowi4_oif = rt->dst.dev->ifindex;
fl4.flowi4_iif = skb->dev->ifindex;
fl4.flowi4_mark = skb->mark;
rcu_read_lock();
if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res) == 0)