Bug fix: when stream is reset, it is writeable

v2.12.8

Update version to 2.12.8

ECN blackholes, new timestamps, and bug fixes

• [FEATURE] Update the timestamp extension to latest version.
• [FEATURE] Cope with appearance of ECN blackholes.
• [OPTIMIZATION] return packno offset and size when header is generated.
• [BUGFIX] ignore old ACK frames in mini conns.
• [BUGFIX] Mark initial server path as initialized.
• [BUGFIX] Do not merge ACK if ECN counts do not match.
• Turn incoming packet number history in mini conn back on.
• Record mini conn event history again when compiled in debug mode.
• IETF mini conn: log when ACK is queued.
• Clean up and refactor code in several places.

Fixes and tying up of loose ends

• Handle ECT-CE event: issue a loss event.
• Log the fact that we ignore SETTINGS_MAX_HEADER_LIST_SIZE.
• Use Max Push ID in GOAWAY frame to cancel promises.
• Add support for HTTP/3 CANCEL_PUSH frame.
• lsquic_stream_is_pushed: streams without headers are never pushed.
• [BUGFIX] Regression in lsquic_stream_shutdown_internal: now it shuts down.
• Improve logic whether to generate CONNECTION_CLOSE.

Minor ECN improvements

• Don't process incoming ECN marks if ECN is not enabled.
• Schedule ACK when incoming packet is marked with CE.

Bugfix release: DPLPMTUD stealing ACK across buffered packets

• [BUGFIX] Generate frame record when moving an ACK from one buffered packet to another.

Bugfix release: DPLPMTUD

• [BUGFIX] Do not return an oversize MTU probe to connection twice.
• [FEATURE] Delayed Acks updated to latest draft. Still experimental.
• Minor code cleanup in IETF full connection.

Bugfix release: Q050 regression

• [BUGFIX] Regression in 2.19.1 that breaks Q050

Bugfix release: PLPMTU sizes, Windows build

• [BUGFIX] Do not reduce PLPMTU size by network overhead.
• [BUGFIX] Windows build.

Feature: DPLPMTUD

• [FEATURE] DPLPMTUD support. IETF connections now search for the maximum packet size, improving throughput.
• [DEBUG] Record event in stream history when on_close() is called in dtor.

Minor bugfix release

• [BUGFIX] Send prediction: lone path challenges do not get squeezed out
• Fix crash in http_client: now -K and -B can be used simultaneously