quic: fix stall datagrams, if no pending streams#64303
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If you are only sending datagrams and so streams, your datagrams could stall. There were two reasons: i. A SendPendingDataScope in SendDatagrams was missing. ii. SendPendingData did not attempt to send datagrams, if there were no stream data. Signed-off-by: Marten Richter <marten.richter@freenet.de>
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This may conflict with the PR of #64234 . The changes of the tests are a bit of a cover up. So suggestions are welcome. The underlying problem is that ngtcp2 does not indicate that instead of a datagram, another packet is sent. (In this case, it is the acknowledgment of the reestablished connection; I have debugged it, and it will run several times to wait for some time to pass.). So also these waiting counts as failure. |
Qard
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Jul 5, 2026
jasnell
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If you are only sending datagrams and so streams,
your datagrams could stall.
There were two reasons:
i. A SendPendingDataScope in SendDatagrams was
missing.
ii. SendPendingData did not attempt to send
datagrams, if there was no stream data.
Also two tests needed changes.