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Connection audit: every connect/disconnect scenario handled + verified

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Systematic actor-death x lifecycle-phase sweep (operator request after
the WaitingForEgg zombie).  New handling, all live-verified:

1. PRE-EGG console-pad loss (the real zombie phase): before the egg the
   pod's only link is the console pad -- the game socket doesn't exist,
   so the earlier RelayGameDown hook could never fire (the verification
   run itself caught this).  Detection now lives in
   HostDisconnectedMessageHandler ConsoleHostType (relayMode +
   pre-scene -> BTRelayRejoinNow); mesh keeps 1995 behavior.
2. MID-MISSION relay loss: the STOP is relay-sent (1995: the console
   owned the clock), so a pod losing its relay mid-match played a
   peer-less FOREVER-mission.  RelayGameDown (scene presented) now
   posts StopMissionMessage at +15s -> normal end -> lobby relaunch.
3. POST-RELEASE pod death stalled the round (survivors wait forever on
   the dead peer's connection gate): relay _abort_round -> route -11
   REJOIN to survivors -> everyone re-seats in seconds (reset-first
   ordering makes the drop cascade re-trigger-proof).
4. BTRelayRejoinNow carries BT_SEAT_CLAIM (mirrored tag): without it
   the rejoiner's own reclaim-hold blocked assignment -> ROSTER FULL
   loop for the 90s window (found by verification round 2).
5. Beacon NAT keepalive (SIO_KEEPALIVE_VALS 60s/10s) so long
   between-rounds waits can't be silently unseated.
6. BT_LOG_APPEND=1 preserves the log across lobby-loop generations
   (truncation erased round-1 verification evidence).

Verified non-issues: relay pods never bind the -net listener (no
double-launch collision on the internet path); mesh bind-fail exits
cleanly.  Full matrix + evidence: context/multiplayer.md;
scratchpad/audit_verify.sh is the repeatable rig.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-23 09:23:23 -05:00
co-authored by Claude Opus 4.8
parent 56ca2f5c13
commit c8cba8c764
4 changed files with 194 additions and 2 deletions
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game/btl4main.cpp
+6 -1
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@@ -189,7 +189,12 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
// file (default btl4.log) -- REQUIRED for multi-instance runs from one cwd
// (instance 2 would truncate instance 1's log).
std::ofstream logfile;
logfile.open(getenv("BT_LOG") ? getenv("BT_LOG") : "btl4.log");
// BT_LOG_APPEND=1: keep prior generations' lines (the lobby-loop
// relaunch truncates the shared BT_LOG otherwise -- multi-generation
// forensics need the whole trail).
logfile.open(getenv("BT_LOG") ? getenv("BT_LOG") : "btl4.log",
(getenv("BT_LOG_APPEND") != NULL && *getenv("BT_LOG_APPEND") == '1')
? (std::ios::out | std::ios::app) : std::ios::out);
std::cout.rdbuf(logfile.rdbuf());
// MP wire-format probe (env BT_NET_PROBE=1): print the exact packet constants