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feat(cast): let the phone share a TV with other controllers and ask before replacing - #652
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Emulators sit behind NAT that mDNS can't cross, so a phone emulator can't discover a TV emulator or an Apple TV simulator, and there was no way to see what a TV advertises. Debug builds get two more PlaybackDebugReceiver actions: - CAST_STATUS (TV): the live Remote Control port, name and TXT record. - CAST_TARGET (phone): adds or replaces a TV target from a host, port, name and TXT string resolved on the host; `--ez clear true` removes them. Injected targets merge with real discovery, survive a restart of it, and win over an mDNS record with the same device id. The browser's TXT parsing moves into SiloCastNsdBrowser.targetFromRecord so the hook and discovery read records the same way, and the advertiser keeps the record it registered so the hook reports exactly that. Behavior of release builds is unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Apple TVs now keep several Remote Control controllers connected and say why they close a session; Android phones treated every close as "someone took over", forgot the TV, and replaced other profiles' titles without asking. This brings the phone and the shared wire format level with silo-apple's SiloControl contract. Every addition is optional and feature-gated, so older peers see today's behavior. Wire (shared): - hello: serverIdentity, features, passive, clientKind; `presence` message; optional `close` reason, decoded leniently as Apple does. - handoff_offer: serverIdentity, resumeToken, replaceConfirmed, replacingContentId. handoff_ready: resumeToken. handoff_cancel: nowPlaying. - Feature, close-reason, cancel-reason and client-kind names, matching Apple's strings. - TVs advertising serverIdentity match an active server on the same deployment at another address. Phone: - Lists close_reason, resume_token and replace_confirmation; a silent auto-resume connects passive and sends presence once the user engages (remote opened, a command, or a title sent). - Close policy: an older TV's close still forgets it. A multi-controller TV's timeout reconnects; tv_disconnected forgets the TV; other reasons end the session but keep the target, and the remote keeps the TV's error. - Sends its profile name, its verified server identity, and the resume token the TV issued it; the token lives in memory per TV, server and profile. - "Replace what's playing?" on the remote, for a TV's replace_confirmation_required and before sending a different title to a TV that is playing one. The consent names the title the user saw. - Play and pause buttons send explicit play/pause for what they show, never play_pause. A rate_limited reply no longer fails a launch. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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📝 Walkthrough
Merge Risk: 🟠 High · up to
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Visible change; evidence is incomplete.
The PR explains that foldable layouts were captured by resizing an emulator and that fold postures were not exercised; that limitation is noted for reviewer consideration. Automated check: Macroscope check run agent (gpt-6-luna). Evidence was not reviewed for correctness. Posted via Macroscope — Visible change evidence |
…shed registration Review follow-ups on the debug hooks: - A resolved mDNS record could pass the "no injected target with this id" check outside the browser's lock and then overwrite an injected target set in between. Every write to the target list now holds the lock. - Clearing an injected target dropped the discovered record it had replaced until discovery found it again. The browser keeps the hidden record and restores it. - CAST_STATUS reported the requested advertisement before NsdManager confirmed it, and under the requested name. It now reports only a registered advertisement, under the name NsdManager registered. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A server signed in before the identity contract has no verified identity on the phone. The picker then can't list a TV that advertises another address of the same deployment, and hello and the handoff offer can't name the deployment. silo-apple learns it on the server's next activation; the phone now learns it once when it starts looking for TVs (the picker or a foreground auto-resume), through ServerIdentityRepository. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Evidence updated (same link). Item by item:
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…ontroller-phone # Conflicts: # android-shared/src/androidMain/kotlin/org/siloserver/silo/common/cast/SiloCastNsdBrowser.kt
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Actionable comments posted: 2
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at
@androidApp/src/androidMain/kotlin/org/siloserver/silo/android/cast/SiloCastController.kt:
- Around line 765-768: Update the targetsActiveServer persistence in the connect
flow to save activeServerId, not target.serverId, when
AndroidServerRegistry.serversMatch confirms the target through server identity.
Keep the existing deviceId and name values unchanged so attemptAutoResumeIfIdle
can match the persisted server by the active registry ID.
- Around line 765-768: Update the HandoffOffer handling to require
session.isAuthorized and a verified identity match with the connected
activeServer before invoking RemotePlaybackIdentityManager.prepare. Use the
authenticated activeServer deployment identity rather than accepting
targetsActiveServer based solely on discovered serverIdentity; reject
unauthorized or mismatched offers without preparing a handoff.
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android-shared/src/androidMain/kotlin/org/siloserver/silo/common/cast/SiloCastNsdBrowser.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/cast/SiloCastController.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/cast/SiloCastPhonePolicy.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/di/AndroidModule.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/cast/SiloCastMiniBar.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/cast/SiloCastRemoteScreen.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/cast/SiloCastTargetPickerSheet.ktandroidApp/src/androidMain/res/values/strings.xmlandroidApp/src/androidUnitTest/kotlin/org/siloserver/silo/android/cast/SiloCastPhonePolicyTest.ktandroidTvApp/src/androidMain/kotlin/org/siloserver/silo/tv/cast/TvSiloCastReceiver.ktshared/src/androidMain/kotlin/org/siloserver/silo/network/AndroidServerRegistry.ktshared/src/commonMain/kotlin/org/siloserver/silo/cast/SiloCastMessage.ktshared/src/commonMain/kotlin/org/siloserver/silo/cast/SiloCastProtocol.ktshared/src/commonTest/kotlin/org/siloserver/silo/cast/SiloCastMessageTest.kt
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…ght session Review follow-ups: - presence is written only to the connection the user engaged with. A reconnect before the write no longer marks the replacement session active. - A TV matched to the active server by deployment identity is saved under the active server's key, so a foreground auto-resume still recognises it after a restart. - A failed identity lookup is tried again on the next browse instead of waiting for an app restart. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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@coderabbitai Two items from your review:
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Tip For best results, initiate chat on the files or code changes. @Quick104 Thanks for the clarification.
The security boundary you describe is device-login approval and validation before profile activation. The connection or resume-token restriction in ✏️ Learnings added
You are interacting with an AI system. |
Problem
Related issue: N/A
Validation tasks: changes #330 C1–C3 (not yet run)
Apple TVs now keep several Remote Control controllers connected (Silo-Server/silo-apple#856) and say why they close a session. An Android phone controlling one treats every close as "someone took over" and forgets the TV, even when the TV only timed out or was full. It also replaces a title another profile is watching without asking.
This brings the Android phone and the shared wire model level with silo-apple's SiloControl contract. The phone asks before replacing what the TV plays, and it reacts to the TV's close reasons.
Approach
Wire (shared). These fields match silo-apple's names and are all optional:
serverIdentity,features,passiveandclientKind.presencemessage.closewith an optional reason, decoded leniently.handoff_offer:resumeToken,replaceConfirmedandreplacingContentId.handoff_ready:resumeToken.handoff_cancel: anowPlayingsummary.The feature, close-reason and cancel-reason names are constants shared with the TV. A TV that advertises
serverIdentitymatches a saved server on the same deployment even at another address.Phone.
close_reason,resume_tokenandreplace_confirmation. A silent auto-resume connects as passive, so it never puts up the TV's standby screen. The phone sendspresenceonce the user engages: opens the remote, sends a command, or sends a title.multi_controlleris still forgotten on any close. With it, a timeout reconnects quietly, Disconnect on the TV forgets the TV, and other reasons end the session but keep the TV for a later foreground. The remote stays up to show the TV's reason.replace_confirmation_requiredbecause another profile's title is on screen. The consent names the title the user saw, so it doesn't cover a title that started meanwhile. Each case asks once.playorpausefor what the button shows, neverplay_pause. Arate_limitedreply no longer fails a launch.Stacked on #651 (debug hooks). The TV-side receiver is #653, stacked on this one. This PR works on its own against an Apple TV running silo-apple#856 and against older TVs.
Validation
testDebugUnitTest: 6,120 tests pass at the top of this stack (last run on 12ff751), including 7 new wire goldens and 6 phone-policy tests.lintDebugpasses for all three modules,lintVitalReleasefor both apps, and the supply-chain checks pass.mainwith test(cast): add adb hooks to inspect and inject Remote Control targets #651's hooks. Sending a different title replaces it without asking, and a second phone knocks this one off.mainand listed on this branch. The phone in this test had signed in before the identity contract, which is how the missing identity lookup was found.mainand this branch both show the TV's "Too many devices" message. This branch keeps the TV for a later reconnect instead of forgetting it.Evidence
Evidence: https://evidence.siloserver.org/r/silo-android/pr-652/
Surface and build: Android phone emulator (1080×2400, 420 dpi) on this stack, and
mainplus #651's hooks for the before captures. I had no signed-in tablet or foldable emulator. The tablet (2560×1600, 320 dpi) and Pixel Fold sizes (open 2208×1840 and closed 1080×2092, both 420 dpi) are the same signed-in emulator resized withwm sizeandwm density. These captures show the dialogs' layout at those sizes but don't exercise fold postures. The Android TV app doesn't change in this PR.Risks
SiloCastControllerandSiloCastRemoteScreen. Whichever lands second needs a rebase. Its "close the remote with a toast" behavior should apply only to the reasons this PR treats as final.Follow-ups: none in this PR. See #653 for receiver follow-ups.
Checklist
AI Disclosure
mainand silo-apple's sources, without running it. On the phone and wire side it found no defects. It confirmed that the passive flag is set before the hello, that presence is resent after the TV's hello, that the close policy and reconnects agree, and that both consent flows sendreplacingContentId. Its receiver findings are listed in feat(tv): keep several Remote Control controllers connected to one TV #653.🤖 Generated with Claude Code
Note
Add multi-controller cast support with replacement confirmation and passive presence
confirmReplace/cancelReplace.SiloCastClosePolicy.ensureConnectedmatches targets by registry ID or verified deployment identity, so another address of the same server is treated as the active server.playPausenow sends an explicitsetPlayingcall, and the mini-bar matches this change.SiloCastHello,SiloCastHandoffOffer, andSiloCastClosechange serialized payloads; older TVs must still decode them, which the tolerant close decoding and absent-feature handling in SiloCastMessageTest.kt cover.Macroscope summarized e58e870.