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linux-sg2042
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[UDP]: Make use of inet_iif() when doing socket lookups. 

UDP currently uses skb->dev->ifindex which may provide the wrong
information when the socket bound to a specific interface.
This patch makes inet_iif() accessible to UDP and makes UDP use it.

The scenario we are trying to fix is when a client is running on
the same system and the server and both client and server bind to
a non-loopback device.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Acked-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2007-10-25 18:54:46 -07:00 committed by David S. Miller
parent 41fb285430
commit fee9dee730
3 changed files with 8 additions and 7 deletions
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6
include/net/inet_hashtables.h
View File

@ -26,7 +26,6 @@
#include <net/inet_connection_sock.h>
#include <net/inet_sock.h>
#include <net/route.h>
#include <net/sock.h>
#include <net/tcp_states.h>
@ -266,11 +265,6 @@ out:
wake_up(&hashinfo->lhash_wait);
}
static inline int inet_iif(const struct sk_buff *skb)
{
return ((struct rtable *)skb->dst)->rt_iif;
}
extern struct sock *__inet_lookup_listener(struct inet_hashinfo *hashinfo,
const __be32 daddr,
const unsigned short hnum,

7
include/net/inet_sock.h
View File

@ -24,6 +24,7 @@
#include <net/flow.h>
#include <net/sock.h>
#include <net/request_sock.h>
#include <net/route.h>
/** struct ip_options - IP Options
*
@ -190,4 +191,10 @@ static inline int inet_sk_ehashfn(const struct sock *sk)
return inet_ehashfn(laddr, lport, faddr, fport);
}
static inline int inet_iif(const struct sk_buff *skb)
{
return ((struct rtable *)skb->dst)->rt_iif;
}
#endif /* _INET_SOCK_H */

2
net/ipv4/udp.c
View File

@ -1152,7 +1152,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
return __udp4_lib_mcast_deliver(skb, uh, saddr, daddr, udptable);
sk = __udp4_lib_lookup(saddr, uh->source, daddr, uh->dest,
skb->dev->ifindex, udptable );
inet_iif(skb), udptable);
if (sk != NULL) {
int ret = udp_queue_rcv_skb(sk, skb);