feat(cast): Chromecast control channel (Play/Stop/Status) - #76
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internal/cast/chromecast_channel.go implements the Cast channel protocol over a TLS socket: platform CONNECT, LAUNCH of the default media receiver (CC1AD845), CONNECT to its transport, LOAD of the stream URL as a LIVE audio/mpeg source, plus GET_STATUS on the receiver and media namespaces and STOP. Heartbeat PINGs are answered inline so a readUntil never stalls. Wires the three remaining chromecastProvider methods: - Play: dial -> launch -> load - Stop: dial -> receiver status -> STOP sessionId (no-op if nothing running) - Status: dial -> receiver status -> media contentId (for re-attach match) TLS uses InsecureSkipVerify -- Cast devices present a self-signed cert with no trustable CA, and the channel carries only playback-control messages; documented at the dial site. Tested against a scripted fake Cast receiver (real TLS listener, throwaway self-signed cert): LAUNCH+LOAD sequence and the loaded contentId, Status active/inactive, Stop issues STOP, PING interleave doesn't stall. No new dependencies. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01JBJdG8Qenand5i16WT6BHG
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Reworked the control channel after live testing against real devices:
Verified end to end: Note: one device here (a Nest Hub) silently drops TCP to its advertised Cast port 8009 from this machine — looks like AP client-isolation; 6 other devices work. Not a code issue. |
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Stacked on the mDNS PR. Completes the Chromecast provider.
chromecast_channel.go— Cast channel protocol over TLS: CONNECT, LAUNCH default media receiver (CC1AD845), LOAD stream URL as LIVE audio/mpeg, GET_STATUS (receiver + media), STOP. Heartbeat PINGs answered inline.TLS
InsecureSkipVerify— Cast devices present a self-signed cert with no trustable CA; channel carries only playback-control messages. Documented at the dial site.Tested against a scripted fake Cast receiver (real TLS listener, throwaway cert). No new dependencies.
After this lands, the Chromecast provider is fully functional; UI + CLI wiring is the next PR.