struct sock *(*syn_recv_sock)(struct sock *sk, struct sk_buff *skb,
struct request_sock *req,
struct dst_entry *dst);
- int (*remember_stamp)(struct sock *sk);
+ struct inet_peer *(*get_peer)(struct sock *sk, bool *release_it);
u16 net_header_len;
u16 sockaddr_len;
int (*setsockopt)(struct sock *sk, int level, int optname,
extern int tcp_v4_rcv(struct sk_buff *skb);
-extern int tcp_v4_remember_stamp(struct sock *sk);
+extern struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it);
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);
goto discard_it;
}
-/* VJ's idea. Save last timestamp seen from this destination
- * and hold it at least for normal timewait interval to use for duplicate
- * segment detection in subsequent connections, before they enter synchronized
- * state.
- */
-
-int tcp_v4_remember_stamp(struct sock *sk)
+struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it)
{
+ struct rtable *rt = (struct rtable *) __sk_dst_get(sk);
struct inet_sock *inet = inet_sk(sk);
- struct tcp_sock *tp = tcp_sk(sk);
- struct rtable *rt = (struct rtable *)__sk_dst_get(sk);
- struct inet_peer *peer = NULL;
- int release_it = 0;
+ struct inet_peer *peer;
if (!rt || rt->rt_dst != inet->inet_daddr) {
peer = inet_getpeer_v4(inet->inet_daddr, 1);
- release_it = 1;
+ *release_it = true;
} else {
if (!rt->peer)
rt_bind_peer(rt, 1);
peer = rt->peer;
+ *release_it = false;
}
- if (peer) {
- if ((s32)(peer->tcp_ts - tp->rx_opt.ts_recent) <= 0 ||
- ((u32)get_seconds() - peer->tcp_ts_stamp > TCP_PAWS_MSL &&
- peer->tcp_ts_stamp <= (u32)tp->rx_opt.ts_recent_stamp)) {
- peer->tcp_ts_stamp = (u32)tp->rx_opt.ts_recent_stamp;
- peer->tcp_ts = tp->rx_opt.ts_recent;
- }
- if (release_it)
- inet_putpeer(peer);
- return 1;
- }
-
- return 0;
+ return peer;
}
-EXPORT_SYMBOL(tcp_v4_remember_stamp);
+EXPORT_SYMBOL(tcp_v4_get_peer);
int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw)
{
.rebuild_header = inet_sk_rebuild_header,
.conn_request = tcp_v4_conn_request,
.syn_recv_sock = tcp_v4_syn_recv_sock,
- .remember_stamp = tcp_v4_remember_stamp,
+ .get_peer = tcp_v4_get_peer,
.net_header_len = sizeof(struct iphdr),
.setsockopt = ip_setsockopt,
.getsockopt = ip_getsockopt,
};
EXPORT_SYMBOL_GPL(tcp_death_row);
+/* VJ's idea. Save last timestamp seen from this destination
+ * and hold it at least for normal timewait interval to use for duplicate
+ * segment detection in subsequent connections, before they enter synchronized
+ * state.
+ */
+
+static int tcp_remember_stamp(struct sock *sk)
+{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_peer *peer;
+ bool release_it;
+
+ peer = icsk->icsk_af_ops->get_peer(sk, &release_it);
+ if (peer) {
+ if ((s32)(peer->tcp_ts - tp->rx_opt.ts_recent) <= 0 ||
+ ((u32)get_seconds() - peer->tcp_ts_stamp > TCP_PAWS_MSL &&
+ peer->tcp_ts_stamp <= (u32)tp->rx_opt.ts_recent_stamp)) {
+ peer->tcp_ts_stamp = (u32)tp->rx_opt.ts_recent_stamp;
+ peer->tcp_ts = tp->rx_opt.ts_recent;
+ }
+ if (release_it)
+ inet_putpeer(peer);
+ return 1;
+ }
+
+ return 0;
+}
+
static __inline__ int tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win)
{
if (seq == s_win)
int recycle_ok = 0;
if (tcp_death_row.sysctl_tw_recycle && tp->rx_opt.ts_recent_stamp)
- recycle_ok = icsk->icsk_af_ops->remember_stamp(sk);
+ recycle_ok = tcp_remember_stamp(sk);
if (tcp_death_row.tw_count < tcp_death_row.sysctl_max_tw_buckets)
tw = inet_twsk_alloc(sk, state);
goto discard_it;
}
-static int tcp_v6_remember_stamp(struct sock *sk)
+struct inet_peer *tcp_v6_get_peer(struct sock *sk, bool *release_it)
{
/* Alas, not yet... */
- return 0;
+ return NULL;
}
static const struct inet_connection_sock_af_ops ipv6_specific = {
.rebuild_header = inet6_sk_rebuild_header,
.conn_request = tcp_v6_conn_request,
.syn_recv_sock = tcp_v6_syn_recv_sock,
- .remember_stamp = tcp_v6_remember_stamp,
+ .get_peer = tcp_v6_get_peer,
.net_header_len = sizeof(struct ipv6hdr),
.setsockopt = ipv6_setsockopt,
.getsockopt = ipv6_getsockopt,
.rebuild_header = inet_sk_rebuild_header,
.conn_request = tcp_v6_conn_request,
.syn_recv_sock = tcp_v6_syn_recv_sock,
- .remember_stamp = tcp_v4_remember_stamp,
+ .get_peer = tcp_v4_get_peer,
.net_header_len = sizeof(struct iphdr),
.setsockopt = ipv6_setsockopt,
.getsockopt = ipv6_getsockopt,