diff options
Diffstat (limited to 'net/netfilter/nf_conntrack_proto_tcp.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_proto_tcp.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c index 88c89e97d8a2..d1582b888c0d 100644 --- a/net/netfilter/nf_conntrack_proto_tcp.c +++ b/net/netfilter/nf_conntrack_proto_tcp.c @@ -571,6 +571,18 @@ static bool tcp_in_window(struct nf_conn *ct, sender->td_maxwin = (win == 0 ? 1 : win); tcp_options(skb, dataoff, tcph, sender); + } else if (tcph->syn && dir == IP_CT_DIR_REPLY && + state->state == TCP_CONNTRACK_SYN_SENT) { + /* Retransmitted syn-ack, or syn (simultaneous open). + * + * Re-init state for this direction, just like for the first + * syn(-ack) reply, it might differ in seq, ack or tcp options. + */ + tcp_init_sender(sender, receiver, + skb, dataoff, tcph, + end, win); + if (!tcph->ack) + return true; } if (!(tcph->ack)) { |