Support Internet Draft 27

• [FEATURE] QUIC and HTTP/3 Internet Draft 27 support.
• [FEATURE] Add experimental delayed ACKs extension.
• Drop support for Internet Draft 24.
• Code cleanup.

Bugfix release

• [BUGFIX] HTTP/3 framing: don't misinterpret rare occurence as error.
• [BUGFIX] Send gap warning due to missing poisoned packet.
• Stream unit test for scenario in issue #106.

BBR bug fix; refactor transport parameters

• [BUGFIX] BBR: call cci_sent() with correct arguments and at correct time (see issue #103).
• Refactor transport parameters module.
• Minor code cleanup.

Post-Interop bugfix release

• [BUGFIX] Send HANDSHAKE_DONE only after Finished is received.
• [BUGFIX] Don't treat garbage UDP padding as library error; ignore it instead.
• [BUGFIX] Fix compilation on FreeBSD (missing header).
• Code cleanup: remove unnecessary #includes.

Bugfix release: Interop feedback

• [BUGFIX] Cancel path responses and challenges on old path when switching to new path.
• [BUGFIX] Do not delay ACKs for Initial and Handshake packets.
• [BUGFIX] Send PATH_CHALLENGE if path changed before mini conn promotion.
• Logging improvements.
• http_client: discard data faster.

Fix coalescing; spin bit enhancements

• [BUGFIX] Coalesced packets could get longer than normal packet size.
• Add spin bit configuration option es_spin (-o spin=[01]).
• Disable spin bit in 1/16 of connections.
• Improve logging a bit.

Support Internet Draft 25

• [FEATURE] QUIC and HTTP/3 Internet Draft 25 support.
• [API] Drop support for ID-23.
• [BUGFIX] Set key phase bit on outgoing packets correctly.
• Code cleanup.

Drop Q039; improvements and code cleanup

• [API] Drop support for Q039.
• Improve ACK-queuing logic. Send an ACK once in a while if peer keeps on sending non-ack-eliciting packets.
• Improve Alt-Svc string: Q050 and later are not included in the old-style "quic" string.
• Send stateless resets if connection could not be promoted.
• Schedule MAX_DATA if needed when DATA_BLOCKED is received.
• Use ls-qpack 0.11.2 -- needed for server push optimization.
• Code cleanup: handle some error cases, improve logging.

Use ls-qpack 0.11.1

• [BUGFIX] Use ls-qpack 0.11.1
• [OPTIMIZATION] Generate random bytes in batches.
• Change loss_bits transport parameter ID to 0x1057 following latest draft.
• Randomize period with which PINGs are sent to elicit ACKs.
• Some refactoring and code cleanup.

Bugfix; optimization; code cleanup

• [BUGFIX] Invalid read when parsing IETF transport parameters (this was benign).
• [OPTIMIZATION] Frame bundling when using buffered packets in IETF QUIC: a) flush QPACK decoder stream and b) include ACKs in opportunistic fashion.
• Fix HTTP/3 framing unit test.
• Code cleanup.