timewait_sock: Create and use getpeer op.
The only thing AF-specific about remembering the timestamp
for a time-wait TCP socket is getting the peer.
Abstract that behind a new timewait_sock_ops vector.
Support for real IPV6 sockets is not filled in yet, but
curiously this makes timewait recycling start to work
for v4-mapped ipv6 sockets.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 3e23964..4097320 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -313,6 +313,7 @@
extern int tcp_v4_rcv(struct sk_buff *skb);
extern struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it);
+extern void *tcp_v4_tw_get_peer(struct sock *sk);
extern int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
extern int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
size_t size);
diff --git a/include/net/timewait_sock.h b/include/net/timewait_sock.h
index 97c3b14..053b3cf 100644
--- a/include/net/timewait_sock.h
+++ b/include/net/timewait_sock.h
@@ -21,6 +21,7 @@
int (*twsk_unique)(struct sock *sk,
struct sock *sktw, void *twp);
void (*twsk_destructor)(struct sock *sk);
+ void *(*twsk_getpeer)(struct sock *sk);
};
static inline int twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
@@ -39,4 +40,11 @@
sk->sk_prot->twsk_prot->twsk_destructor(sk);
}
+static inline void *twsk_getpeer(struct sock *sk)
+{
+ if (sk->sk_prot->twsk_prot->twsk_getpeer)
+ return sk->sk_prot->twsk_prot->twsk_getpeer(sk);
+ return NULL;
+}
+
#endif /* _TIMEWAIT_SOCK_H */
