* no RST generated if md5 hash doesn't match.
*/
sk1 = __inet_lookup_listener(dev_net(skb_dst(skb)->dev),
- &tcp_hashinfo, ip_hdr(skb)->daddr,
+ &tcp_hashinfo, ip_hdr(skb)->saddr,
+ th->source, ip_hdr(skb)->daddr,
ntohs(th->source), inet_iif(skb));
/* don't send rst if it can't find key */
if (!sk1)
*/
static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
- u32 win, u32 ts, int oif,
+ u32 win, u32 tsval, u32 tsecr, int oif,
struct tcp_md5sig_key *key,
int reply_flags, u8 tos)
{
arg.iov[0].iov_base = (unsigned char *)&rep;
arg.iov[0].iov_len = sizeof(rep.th);
- if (ts) {
+ if (tsecr) {
rep.opt[0] = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
(TCPOPT_TIMESTAMP << 8) |
TCPOLEN_TIMESTAMP);
- rep.opt[1] = htonl(tcp_time_stamp);
- rep.opt[2] = htonl(ts);
+ rep.opt[1] = htonl(tsval);
+ rep.opt[2] = htonl(tsecr);
arg.iov[0].iov_len += TCPOLEN_TSTAMP_ALIGNED;
}
#ifdef CONFIG_TCP_MD5SIG
if (key) {
- int offset = (ts) ? 3 : 0;
+ int offset = (tsecr) ? 3 : 0;
rep.opt[offset++] = htonl((TCPOPT_NOP << 24) |
(TCPOPT_NOP << 16) |
tcp_v4_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
+ tcp_time_stamp + tcptw->tw_ts_offset,
tcptw->tw_ts_recent,
tw->tw_bound_dev_if,
tcp_twsk_md5_key(tcptw),
tcp_v4_send_ack(skb, (sk->sk_state == TCP_LISTEN) ?
tcp_rsk(req)->snt_isn + 1 : tcp_sk(sk)->snd_nxt,
tcp_rsk(req)->rcv_nxt, req->rcv_wnd,
+ tcp_time_stamp,
req->ts_recent,
0,
tcp_md5_do_lookup(sk, (union tcp_md5_addr *)&ip_hdr(skb)->daddr,
{
struct tcp_sock *tp = tcp_sk(sk);
struct tcp_md5sig_key *key;
- struct hlist_node *pos;
unsigned int size = sizeof(struct in_addr);
struct tcp_md5sig_info *md5sig;
if (family == AF_INET6)
size = sizeof(struct in6_addr);
#endif
- hlist_for_each_entry_rcu(key, pos, &md5sig->head, node) {
+ hlist_for_each_entry_rcu(key, &md5sig->head, node) {
if (key->family != family)
continue;
if (!memcmp(&key->addr, addr, size))
{
struct tcp_sock *tp = tcp_sk(sk);
struct tcp_md5sig_key *key;
- struct hlist_node *pos, *n;
+ struct hlist_node *n;
struct tcp_md5sig_info *md5sig;
md5sig = rcu_dereference_protected(tp->md5sig_info, 1);
if (!hlist_empty(&md5sig->head))
tcp_free_md5sig_pool();
- hlist_for_each_entry_safe(key, pos, n, &md5sig->head, node) {
+ hlist_for_each_entry_safe(key, n, &md5sig->head, node) {
hlist_del_rcu(&key->node);
atomic_sub(sizeof(*key), &sk->sk_omem_alloc);
kfree_rcu(key, rcu);
goto drop_and_free;
if (!want_cookie || tmp_opt.tstamp_ok)
- TCP_ECN_create_request(req, skb);
+ TCP_ECN_create_request(req, skb, sock_net(sk));
if (want_cookie) {
isn = cookie_v4_init_sequence(sk, skb, &req->mss);
}
}
+/* Packet is added to VJ-style prequeue for processing in process
+ * context, if a reader task is waiting. Apparently, this exciting
+ * idea (VJ's mail "Re: query about TCP header on tcp-ip" of 07 Sep 93)
+ * failed somewhere. Latency? Burstiness? Well, at least now we will
+ * see, why it failed. 8)8) --ANK
+ *
+ */
+bool tcp_prequeue(struct sock *sk, struct sk_buff *skb)
+{
+ struct tcp_sock *tp = tcp_sk(sk);
+
+ if (sysctl_tcp_low_latency || !tp->ucopy.task)
+ return false;
+
+ if (skb->len <= tcp_hdrlen(skb) &&
+ skb_queue_len(&tp->ucopy.prequeue) == 0)
+ return false;
+
+ __skb_queue_tail(&tp->ucopy.prequeue, skb);
+ tp->ucopy.memory += skb->truesize;
+ if (tp->ucopy.memory > sk->sk_rcvbuf) {
+ struct sk_buff *skb1;
+
+ BUG_ON(sock_owned_by_user(sk));
+
+ while ((skb1 = __skb_dequeue(&tp->ucopy.prequeue)) != NULL) {
+ sk_backlog_rcv(sk, skb1);
+ NET_INC_STATS_BH(sock_net(sk),
+ LINUX_MIB_TCPPREQUEUEDROPPED);
+ }
+
+ tp->ucopy.memory = 0;
+ } else if (skb_queue_len(&tp->ucopy.prequeue) == 1) {
+ wake_up_interruptible_sync_poll(sk_sleep(sk),
+ POLLIN | POLLRDNORM | POLLRDBAND);
+ if (!inet_csk_ack_scheduled(sk))
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ (3 * tcp_rto_min(sk)) / 4,
+ TCP_RTO_MAX);
+ }
+ return true;
+}
+EXPORT_SYMBOL(tcp_prequeue);
+
/*
* From tcp_input.c
*/
case TCP_TW_SYN: {
struct sock *sk2 = inet_lookup_listener(dev_net(skb->dev),
&tcp_hashinfo,
+ iph->saddr, th->source,
iph->daddr, th->dest,
inet_iif(skb));
if (sk2) {
void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo)
{
- proc_net_remove(net, afinfo->name);
+ remove_proc_entry(afinfo->name, net->proc_net);
}
EXPORT_SYMBOL(tcp_proc_unregister);
static int __net_init tcp_sk_init(struct net *net)
{
+ net->ipv4.sysctl_tcp_ecn = 2;
return 0;
}