quic: fix several bugs in flow control accounting

Connection-level flow control sets a bound on the total maximum
stream offset of all data sent, not the total amount of bytes sent
in STREAM frames. For example, if we send the bytes [0,10) for a
stream, and then retransmit the same bytes due to packet loss,
that consumes 10 bytes of connection-level flow, not 20.

We were incorrectly tracking total bytes sent. Fix this.

We were blocking retransmission of data in lost STREAM frames
on availability of connection-level flow control.
We now place a stream with retransmitted data on queueMeta
(non-flow-controlled data), since we have already
accounted for the flow control window consumption of the
data.

We were incorrectly marking a stream as being able to send
an empty STREAM frame with a FIN bit, when the stream was
actually blocked on stream-level flow control. Fix this.

For golang/go#58547

Change-Id: Ib2ace94183750078a19d945256507060ea786735
Reviewed-on: https://go-review.googlesource.com/c/net/+/532716
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
3 files changed
tree: 6ef87970ed9db23a7c719c88a5f7396a706af6ac
  1. bpf/
  2. context/
  3. dict/
  4. dns/
  5. html/
  6. http/
  7. http2/
  8. icmp/
  9. idna/
  10. internal/
  11. ipv4/
  12. ipv6/
  13. lif/
  14. nettest/
  15. netutil/
  16. proxy/
  17. publicsuffix/
  18. route/
  19. trace/
  20. webdav/
  21. websocket/
  22. xsrftoken/
  23. .gitattributes
  24. .gitignore
  25. codereview.cfg
  26. CONTRIBUTING.md
  27. go.mod
  28. go.sum
  29. LICENSE
  30. PATENTS
  31. README.md
README.md

Go Networking

Go Reference

This repository holds supplementary Go networking libraries.

Download/Install

The easiest way to install is to run go get -u golang.org/x/net. You can also manually git clone the repository to $GOPATH/src/golang.org/x/net.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html. The main issue tracker for the net repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/net:” in the subject line, so it is easy to find.