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Walk-up callsign/mech request: join menu -> relay -> the session egg

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The 1995 front-desk conversation, over the internet.  join.bat/
join_lan.bat now open a JOIN-GAME menu (the FE in BT_FE_JOIN trim:
CALLSIGN edit + the 18-mech list + JOIN); the choice relaunches into the
normal join with BT_CALLSIGN/BT_MECH env, rides the relay SEAT_REQUEST
as {callsign NUL mech NUL} (empty payload = roster defaults, wire-
compatible), and the relay validates the mech tag, HOLDS egg delivery
until every pod's console pad is connected, rewrites the egg via
eggmodel (vehicle= + rasterized callsign bitmaps, graceful no-PySide6
fallback) and streams it to all pads -- so every player's egg copy
carries every player's callsign.

The hold is gated on CONSOLE-PAD count, not game-side registration: a
pod HELLOs only after parsing the egg's roster, so a registration gate
deadlocks (hit live in the first run; pods animate in WAITING FOR
MISSION ASSIGNMENT during the hold).

Verified 2-node e2e (env-injected requests): thor/vulture requested over
roster defaults bhk1/ava1 -> relay held 1/2, released at 2/2, rewrote
both seats (relay log), the delivered egg carries vehicle=thor/vulture +
name=VIPER/MONGOOSE, both pods launched and built [cyl] tables for both
requested mechs.  Join-menu layout screenshot-verified; the menu's
click-through relaunch awaits live human verification.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-22 13:58:51 -05:00
co-authored by Claude Opus 4.8
parent eb618fe9e6
commit fcedc046cf
9 changed files with 239 additions and 25 deletions
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game/btl4main.cpp
+10
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@@ -457,6 +457,16 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
SetEnvironmentVariableA("BT_FE_EGG", NULL);
sprintf(fe_arguments, "-net %d -platform glass", fe_spec.consolePort);
break;
case BTFeLaunchJoinRelay:
// BT_FE_JOIN (join.bat): the callsign/mech request rides env
// into the relaunched pod; L4NET's SEAT_REQUEST carries it to
// the relay, which writes it into the session egg. Args = the
// universal join contract (join.bat's own OPERATOR.EGG/1501).
SetEnvironmentVariableA("BT_FE_EGG", NULL);
SetEnvironmentVariableA("BT_CALLSIGN", fe_spec.joinCallsign);
SetEnvironmentVariableA("BT_MECH", fe_spec.joinVehicle);
strcpy(fe_arguments, "-egg OPERATOR.EGG -net 1501 -platform glass");
break;
#ifdef BT_STEAM
case BTFeLaunchJoinSteam:
SetEnvironmentVariableA("BT_FE_EGG", NULL);