tproxy: added udp6_lib_lookup function

Just like with IPv4, we need access to the UDP hash table to look up local
sockets, but instead of exporting the global udp_table, export a lookup
function.

Signed-off-by: Balazs Scheidler <bazsi@balabit.hu>
Signed-off-by: KOVACS Krisztian <hidden@balabit.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 33e368318d47..c84dad432114 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -320,6 +320,14 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
                                  udptable);
 }
 
+struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport,
+                             const struct in6_addr *daddr, __be16 dport, int dif)
+{
+        return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table);
+}
+EXPORT_SYMBOL_GPL(udp6_lib_lookup);
+
+
 /*
  *      This should be easy, if there is something there we
  *      return it, otherwise we block.