[IPV6]: Introduce inet6_timewait_sock

Out of tcp6_timewait_sock, that now is just an aggregation of
inet_timewait_sock and inet6_timewait_sock, using tw_ipv6_offset in struct
inet_timewait_sock, that is common to the IPv6 transport protocols that use
timewait sockets, like DCCP and TCP.

tw_ipv6_offset plays the struct inet_sock pinfo6 role, i.e. for the generic
code to find the IPv6 area in a timewait sock.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index 28f7b2103505..ca240f856c46 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -127,7 +127,8 @@ struct inet_timewait_sock {
         __u16                   tw_num;
         /* And these are ours. */
         __u8                    tw_ipv6only:1;
-        /* 31 bits hole, try to pack */
+        /* 15 bits hole, try to pack */
+        __u16                   tw_ipv6_offset;
         int                     tw_timeout;
         unsigned long           tw_ttd;
         struct inet_bind_bucket *tw_tb;