commit 1c7ff0d0019ef38dddd8154948aae58a39cd2706
author Victor Boivie <boivie@webrtc.org> Wed Jun 02 07:34:38 2021
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> Wed Jun 02 09:45:59 2021
tree 706ad80bebc411af60931409b815bf51453adcaf
parent 5981bf2eb66858eeea2072a81ac122433b10a3b7

dcsctp: Stay in stream if not producing fragment

If there is only little space left in a packet, and the remaining data
for a partially sent message is much larger, it will not generate a
small fragment for this message. This is to avoid fragmenting a message
into too many packets, as that increases the risk of losing messages
when partial reliability is enabled.

And when a stream doesn't want to generate a too small fragment, the
scheduler should _not_ switch streams. It should only switch streams
when a message has been fully sent. Previously, it would switch stream
when a stream doesn't want to produce a message, but as noted above,
that could happen for other reasons.

This required some refactoring, which also increased its robustness by
now only doing explicit stream switching on fully produced messages.

Bug: webrtc:12832
Change-Id: Icb213774fd0d26fba5640b00aac0407d393e4bfc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/220937
Commit-Queue: Victor Boivie <boivie@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34197}