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tcp: Fix setting window from maximum ACK sequence in batch

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If we're at the first message in a batch, it's safe to get the
window value from it, and there's no need to subtract anything for
a comparison on that's not even done -- we'll override it later in
any case if we find messages with a higher ACK sequence number.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-09-16 08:20:50 +02:00
parent 3be131280d
commit a7eb8bb2f6
1 changed files with 2 additions and 6 deletions
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6
tcp.c
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@ -2002,12 +2002,8 @@ static void tcp_data_from_tap(struct ctx *c, struct tcp_tap_conn *conn,
seq = ntohl(th->seq); seq = ntohl(th->seq);
ack_seq = ntohl(th->ack_seq); ack_seq = ntohl(th->ack_seq);
if (!i) { if (!i)
if (count == 1)
max_ack_seq_wnd = ntohs(th->window); max_ack_seq_wnd = ntohs(th->window);
else
max_ack_seq_wnd = ntohs(th->window) - 1;
}
if (th->ack) { if (th->ack) {
ack = 1; ack = 1;