v0.6.0

Companion release to aiortp 0.6.0.

• Comfort noise passthrough: CallSession grows cn /
  cn_payload_type, riding through to aiortp.RTPSession.create — with
  cn=True, silence in a call plays RFC 3389 comfort noise instead of
  dead air.
• The rtp extra requires aiortp >= 0.6.0.

No breaking changes from 0.5.0.

v0.5.0

SIP conformance overhaul and a major feature batch: this release makes
aiosipua hold its own against real-world SIP servers and adds the
signaling features a voice-AI backend needs.

Breaking changes

• SipUAC.send_cancel(call) replaces send_cancel(dialog, remote_addr) —
  the CANCEL is built from the original INVITE (same branch and CSeq,
  RFC 3261 §9.1), which is what proxies require to match it.
• SipMessage.body is now bytes (SIP bodies are octet streams). Read or
  write text bodies through the new message.text property; parse_sdp
  raises a TypeError pointing at .text if handed bytes.

Conformance fixes

• Digest authentication rewritten per RFC 7616: qop="auth" (cnonce/nc),
  SHA-256 (RFC 8760) alongside MD5, opaque echoed — challenges from
  Asterisk/FreeSWITCH/Kamailio now succeed.
• re-INVITE 200s are ACKed with their own CSeq; on_answer no longer replays.
• In-dialog requests are validated against the dialog (wrong tags → 481,
  non-increasing CSeq → 500); CANCEL matches the INVITE transaction by branch.
• SDP answers mirror every offered m-line in order, port 0 for rejected
  streams (RFC 3264 §6).
• received/rport stamped on incoming Vias (RFC 3581); advertised_addr
  on UAC/UAS for NATed signaling.

New features

• Reliability: 200 OK retransmitted until ACK over UDP, reliable
  provisionals with PRACK/100rel (RFC 3262), automatic transaction expiry.
• REGISTER client with auto-refresh, 423 handling, and expiry watchdog.
• UPDATE (RFC 3311) and blind transfer via REFER (RFC 3515) with
  transfer-progress NOTIFYs.
• Session timers (RFC 4028): UPDATE refreshes and dead-call watchdogs.
• IPv6 end to end: bracketed literals in Via/Contact/URIs, IN IP6 SDP.

Hardening

• Header-injection guards on all header setters; size caps on header count,
  TCP header bytes, and declared body length; required-header validation.
• Parser survives the RFC 4475 torture suite and holds two hypothesis-checked
  invariants: only ValueError on arbitrary input, and a stable wire format
  after one normalization pass.

344 → 524 tests; every module under strict mypy.

v0.4.1

What's Changed

• SIP NAT traversal -- All SDP functions, CallSession, and VideoCallSession accept an advertised_ip parameter. When set, SDP c=/o= lines use the advertised IP while RTP sockets bind to local_ip. Fully backward compatible.

Full Changelog: https://github.com/roomkit-live/aiosipua/compare/v0.4.0...v0.4.1

v0.4.0

What's New

Video support

• negotiate_video_sdp — SDP answer for video media lines (H264, VP8, VP9, AV1)
• negotiate_av_sdp — combined audio+video negotiation in a single answer
• build_video_sdp — build video-only SDP offers for outgoing calls
• VideoCallSession — bridges video SDP negotiation to aiortp VideoRTPSession with frame callbacks
• SdpMessage.video and .video_rtp_address convenience properties

Improvements

• Extracted _BaseCallSession base class shared by CallSession and VideoCallSession
• Extracted _build_sdp_envelope helper to DRY SDP construction across 5 call sites
• Added GitHub Actions CI (tests on 3.11/3.12/3.13, ruff lint+format, mypy)

Fixes

• Removed dead _WELL_KNOWN_VIDEO_CODECS dict
• Removed unsafe aiortp.SUPPORTED_VIDEO_CODECS reference that could raise AttributeError
• Fixed pre-existing mypy no-redef error in uas.py
• Fixed license in README (BSD-3-Clause → MIT)