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inet: Add udplib_lookup_skb() helpers 

To be able to use the cached socket reference in the skb during input
processing we add a new set of lookup functions that receive the skb on
their argument list.

Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
KOVACS Krisztian 2008-10-07 12:38:32 -07:00 committed by David S. Miller
parent 9a1f27c480
commit 607c4aaf03
2 changed files with 24 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
net/ipv4/udp.c
View File

@ -302,6 +302,17 @@ static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
return result;
}
static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
__be16 sport, __be16 dport,
struct hlist_head udptable[])
{
const struct iphdr *iph = ip_hdr(skb);
return __udp4_lib_lookup(dev_net(skb->dst->dev), iph->saddr, sport,
iph->daddr, dport, inet_iif(skb),
udptable);
}
struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
__be32 daddr, __be16 dport, int dif)
{
@ -1208,8 +1219,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
return __udp4_lib_mcast_deliver(net, skb, uh,
saddr, daddr, udptable);
sk = __udp4_lib_lookup(net, saddr, uh->source, daddr,
uh->dest, inet_iif(skb), udptable);
sk = __udp4_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
if (sk != NULL) {
int ret = udp_queue_rcv_skb(sk, skb);

14
net/ipv6/udp.c
View File

@ -107,6 +107,17 @@ static struct sock *__udp6_lib_lookup(struct net *net,
return result;
}
static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
__be16 sport, __be16 dport,
struct hlist_head udptable[])
{
struct ipv6hdr *iph = ipv6_hdr(skb);
return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
&iph->daddr, dport, inet6_iif(skb),
udptable);
}
/*
* This should be easy, if there is something there we
* return it, otherwise we block.
@ -488,8 +499,7 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
* check socket cache ... must talk to Alan about his plans
* for sock caches... i'll skip this for now.
*/
sk = __udp6_lib_lookup(net, saddr, uh->source,
daddr, uh->dest, inet6_iif(skb), udptable);
sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
if (sk == NULL) {
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))