From: Victor Julien <victor@inliniac.net>
Date: Tue, 16 Oct 2012 13:39:34 +0000 (+0200)
Subject: stream: accept ack with next_seq + 1 on last_ack state
X-Git-Tag: suricata-1.4beta3~80
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6326390120c687ccef0423eef9e4e12d58559e53;p=thirdparty%2Fsuricata.git

stream: accept ack with next_seq + 1 on last_ack state
---

diff --git a/src/stream-tcp.c b/src/stream-tcp.c
index b801826246..fd504c18a6 100644
--- a/src/stream-tcp.c
+++ b/src/stream-tcp.c
@@ -3408,7 +3408,7 @@ static int StreamTcpPakcetStateLastAck(ThreadVars *tv, Packet *p,
                     "%" PRIu32 ", ACK %" PRIu32 "", ssn, p->payload_len,
                     TCP_GET_SEQ(p), TCP_GET_ACK(p));
 
-            if (TCP_GET_SEQ(p) != ssn->client.next_seq) {
+            if (TCP_GET_SEQ(p) != ssn->client.next_seq && TCP_GET_SEQ(p) != ssn->client.next_seq + 1) {
                 SCLogDebug("ssn %p: -> SEQ mismatch, packet SEQ %" PRIu32 ""
                         " != %" PRIu32 " from stream", ssn,
                         TCP_GET_SEQ(p), ssn->client.next_seq);