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tcp: fix window scaling of synack being ignored.

This commit is contained in:
Dario Nieuwenhuis 2021-06-17 05:56:01 +02:00
parent 60a299bcc2
commit 736a17cae3
1 changed files with 27 additions and 0 deletions
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27
src/socket/tcp.rs
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@ -1411,6 +1411,7 @@ impl<'a> TcpSocket<'a> {
self.remote_seq_no = repr.seq_number + 1;
self.remote_last_seq = self.local_seq_no + 1;
self.remote_last_ack = Some(repr.seq_number);
self.remote_win_scale = repr.window_scale;
if let Some(max_seg_size) = repr.max_seg_size {
self.remote_mss = max_seg_size as usize;
}
@ -2925,6 +2926,32 @@ mod test {
}
}
#[test]
fn test_syn_sent_syn_ack_window_scaling() {
let mut s = socket_syn_sent();
recv!(s, [TcpRepr {
control: TcpControl::Syn,
seq_number: LOCAL_SEQ,
ack_number: None,
max_seg_size: Some(BASE_MSS),
window_scale: Some(0),
sack_permitted: true,
..RECV_TEMPL
}]);
send!(s, TcpRepr {
control: TcpControl::Syn,
seq_number: REMOTE_SEQ,
ack_number: Some(LOCAL_SEQ + 1),
max_seg_size: Some(BASE_MSS - 80),
window_scale: Some(7),
window_len: 42,
..SEND_TEMPL
});
assert_eq!(s.state, State::Established);
assert_eq!(s.remote_win_scale, Some(7));
}
// =========================================================================================//
// Tests for the ESTABLISHED state.
// =========================================================================================//