udp: Export UDP socket lookup function

The iptables tproxy code has to be able to do UDP socket hash lookups,
so we have to provide an exported lookup function for this purpose.

Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/udp.h b/include/net/udp.h
index addcdc67234c63dd6afc714a8b580dda02c28888..d38f6f2419f95114199ccf0034211cc72fa3a308 100644 (file)
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -148,6 +148,10 @@ extern int         udp_lib_setsockopt(struct sock *sk, int level, int optname,
                                   char __user *optval, int optlen,
                                   int (*push_pending_frames)(struct sock *));
 
+extern struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
+                                   __be32 daddr, __be16 dport,
+                                   int dif);
+
 DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
 
 /* UDP-Lite does not have a standardized MIB yet, so we inherit from UDP */

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 57e26fa66185affd152d8613800ee5a9e6230991..c83d0ef469c9db4bd31a18a60c1f89e44fb0c519 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -302,6 +302,13 @@ static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
        return result;
 }
 
+struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
+                            __be32 daddr, __be16 dport, int dif)
+{
+       return __udp4_lib_lookup(net, saddr, sport, daddr, dport, dif, udp_hash);
+}
+EXPORT_SYMBOL_GPL(udp4_lib_lookup);
+
 static inline struct sock *udp_v4_mcast_next(struct sock *sk,
                                             __be16 loc_port, __be32 loc_addr,
                                             __be16 rmt_port, __be32 rmt_addr,