static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
struct request_sock *req,
struct request_values *rvp,
- u16 queue_mapping)
+ u16 queue_mapping,
+ bool nocache)
{
const struct inet_request_sock *ireq = inet_rsk(req);
struct flowi4 fl4;
struct sk_buff * skb;
/* First, grab a route. */
- if (!dst && (dst = inet_csk_route_req(sk, &fl4, req)) == NULL)
+ if (!dst && (dst = inet_csk_route_req(sk, &fl4, req, nocache)) == NULL)
return -1;
skb = tcp_make_synack(sk, dst, req, rvp);
err = net_xmit_eval(err);
}
- dst_release(dst);
return err;
}
struct request_values *rvp)
{
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
- return tcp_v4_send_synack(sk, NULL, req, rvp, 0);
+ return tcp_v4_send_synack(sk, NULL, req, rvp, 0, false);
}
/*
*/
if (tmp_opt.saw_tstamp &&
tcp_death_row.sysctl_tw_recycle &&
- (dst = inet_csk_route_req(sk, &fl4, req)) != NULL &&
+ (dst = inet_csk_route_req(sk, &fl4, req, want_cookie)) != NULL &&
fl4.daddr == saddr &&
(peer = rt_get_peer((struct rtable *)dst, fl4.daddr)) != NULL) {
inet_peer_refcheck(peer);
if (tcp_v4_send_synack(sk, dst, req,
(struct request_values *)&tmp_ext,
- skb_get_queue_mapping(skb)) ||
+ skb_get_queue_mapping(skb),
+ want_cookie) ||
want_cookie)
goto drop_and_free;
}
EXPORT_SYMBOL(tcp_v4_do_rcv);
+int tcp_v4_early_demux(struct sk_buff *skb)
+{
+ struct net *net = dev_net(skb->dev);
+ const struct iphdr *iph;
+ const struct tcphdr *th;
+ struct net_device *dev;
+ struct sock *sk;
+ int err;
+
+ err = -ENOENT;
+ if (skb->pkt_type != PACKET_HOST)
+ goto out_err;
+
+ if (!pskb_may_pull(skb, ip_hdrlen(skb) + sizeof(struct tcphdr)))
+ goto out_err;
+
+ iph = ip_hdr(skb);
+ th = (struct tcphdr *) ((char *)iph + ip_hdrlen(skb));
+
+ if (th->doff < sizeof(struct tcphdr) / 4)
+ goto out_err;
+
+ if (!pskb_may_pull(skb, ip_hdrlen(skb) + th->doff * 4))
+ goto out_err;
+
+ dev = skb->dev;
+ sk = __inet_lookup_established(net, &tcp_hashinfo,
+ iph->saddr, th->source,
+ iph->daddr, th->dest,
+ dev->ifindex);
+ if (sk) {
+ skb->sk = sk;
+ skb->destructor = sock_edemux;
+ if (sk->sk_state != TCP_TIME_WAIT) {
+ struct dst_entry *dst = sk->sk_rx_dst;
+ if (dst)
+ dst = dst_check(dst, 0);
+ if (dst) {
+ struct rtable *rt = (struct rtable *) dst;
+
+ if (rt->rt_iif == dev->ifindex) {
+ skb_dst_set_noref(skb, dst);
+ err = 0;
+ }
+ }
+ }
+ }
+
+out_err:
+ return err;
+}
+
/*
* From tcp_input.c
*/
goto discard_it;
}
-struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it)
+struct inet_peer *tcp_v4_get_peer(struct sock *sk)
{
struct rtable *rt = (struct rtable *) __sk_dst_get(sk);
struct inet_sock *inet = inet_sk(sk);
- struct inet_peer *peer;
- if (!rt ||
- inet->cork.fl.u.ip4.daddr != inet->inet_daddr) {
- peer = inet_getpeer_v4(inet->inet_daddr, 1);
- *release_it = true;
- } else {
- if (!rt->peer)
- rt_bind_peer(rt, inet->inet_daddr, 1);
- peer = rt->peer;
- *release_it = false;
- }
-
- return peer;
+ /* If we don't have a valid cached route, or we're doing IP
+ * options which make the IPv4 header destination address
+ * different from our peer's, do not bother with this.
+ */
+ if (!rt || inet->cork.fl.u.ip4.daddr != inet->inet_daddr)
+ return NULL;
+ return rt_get_peer_create(rt, inet->inet_daddr);
}
EXPORT_SYMBOL(tcp_v4_get_peer);
-void *tcp_v4_tw_get_peer(struct sock *sk)
-{
- const struct inet_timewait_sock *tw = inet_twsk(sk);
-
- return inet_getpeer_v4(tw->tw_daddr, 1);
-}
-EXPORT_SYMBOL(tcp_v4_tw_get_peer);
-
static struct timewait_sock_ops tcp_timewait_sock_ops = {
.twsk_obj_size = sizeof(struct tcp_timewait_sock),
.twsk_unique = tcp_twsk_unique,
.twsk_destructor= tcp_twsk_destructor,
- .twsk_getpeer = tcp_v4_tw_get_peer,
};
const struct inet_connection_sock_af_ops ipv4_specific = {