AirPlay2 protocol

This page collects information on parts of AirPlay2 protocol. It could be useful if Apple drops "legacy" protocol support.

• Here is a description of the initial "Legacy Pairing" protocol (pair-pin-start + pair-setup-pin + pair-verify) and (pair-setup + pair-verify) implemented in Uxplay

• Here are other links to information on pair-pin-setup for modern AirPlay2 pairing with encrypted client-server communication.

  https://htmlpreview.github.io/?https://github.com/philippe44/RAOP-Player/blob/master/doc/auth_protocol.html

  https://github.com/philippe44/libraop

  https://github.com/warren-bank/Java-AirPlay2-Receiver

  https://github.com/openairplay/airplay2-receiver

  https://github.com/cocagne/csrp/tree/rfc5054_compat

  OpenSSL: srp_lib.c srp.h

• pyatv (AirPlay2 client) protocol page

  https://pyatv.dev/documentation/protocols

• The 2 sec Audio delay in ALAC mode:

  https://www.reddit.com/r/HomePod/comments/su3sh6/why_has_audio_airplay_such_a_big_delay_compared/

• openairplay Unofficial AirPlay1 specs

  http://nto.github.io/AirPlay.html

  https://emanuelecozzi.net/docs/airplay2/features

  https://openairplay.github.io/airplay-spec/

  https://git.zx2c4.com/Airtunes2/about/

  https://air-display.github.io/airplay-internal/

• Apple docs

  https://developer.apple.com/documentation/avfoundation

• HLS version 7 (2017): https://datatracker.ietf.org/doc/html/rfc8216

• HLS (slighly older) supported by hlsparse https://datatracker.ietf.org/doc/html/draft-pantos-http-live-streaming-23

• https://developer.apple.com/documentation/http-live-streaming

• https://developer.apple.com/documentation/avfoundation/avplayer/actionatitemend

• https://developer.apple.com/documentation/avfoundation/avplayeritem/1385622-forwardplaybackendtime

• https://www.toptal.com/apple/introduction-to-http-live-streaming-hls

• https://developer.apple.com/library/archive/documentation/NetworkingInternet/Conceptual/StreamingMediaGuide/UsingHTTPLiveStreaming/UsingHTTPLiveStreaming.html

• https://github.com/VKCOM/m3u8/tree/master/sample-playlists

• homekit pairing implementations

https://github.com/openairplay/airplay2-receiver/tree/master

https://github.com/ejurgensen/pair_ap