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timewait_sock: Create and use getpeer op.

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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>
This commit is contained in:
David S. Miller
2010-12-01 18:09:13 -08:00
parent 4399ce402c
commit ccb7c410dd
5 changed files with 63 additions and 37 deletions
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8
include/net/timewait_sock.h
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@@ -21,6 +21,7 @@ struct timewait_sock_ops {
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 @@ static inline void twsk_destructor(struct sock *sk)
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 */