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Add opt-in room crossplay compatibility

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Incentive
2026-05-25 18:13:50 -04:00
parent 0789f04d6a
commit 7e9c6c185a
1 changed files with 30 additions and 1 deletions
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src/ReceiveCommands.cc
+30 -1
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@@ -4920,6 +4920,31 @@ static asio::awaitable<void> on_C9_XB(shared_ptr<Client> c, Channel::Message& ms
co_return; co_return;
} }
static uint16_t safe_default_compatibility_group_for_version(Version v) {
static_assert(NUM_VERSIONS == 14, "Don't forget to update the safe default compatibility groups");
static const array<uint16_t, NUM_VERSIONS> groups = {{
0x0000, // PC_PATCH
0x0000, // BB_PATCH
0x0004, // DC_NTE compatible only with itself
0x0008, // DC_11_2000 compatible only with itself
0x00B0, // DC_V1 compatible with DC_V1, DC_V2, and PC_V2
0x00B0, // DC_V2 compatible with DC_V1, DC_V2, and PC_V2
0x0040, // PC_NTE compatible only with itself
0x00B0, // PC_V2 compatible with DC_V1, DC_V2, and PC_V2
0x0100, // GC_NTE compatible only with itself
0x1200, // GC_V3 compatible with GC_V3 and XB_V3
0x0400, // GC_EP3_NTE compatible only with itself
0x0800, // GC_EP3 compatible only with itself
0x1200, // XB_V3 compatible with GC_V3 and XB_V3
0x2000, // BB_V4 compatible only with itself
}};
return groups.at(static_cast<size_t>(v));
}
static bool game_name_enables_full_crossplay(const string& name) {
return !name.empty() && ((name[0] == 'x') || (name[0] == 'X'));
}
shared_ptr<Lobby> create_game_generic( shared_ptr<Lobby> create_game_generic(
shared_ptr<ServerState> s, shared_ptr<ServerState> s,
shared_ptr<Client> creator_c, shared_ptr<Client> creator_c,
@@ -4960,7 +4985,11 @@ shared_ptr<Lobby> create_game_generic(
game->episode = episode; game->episode = episode;
game->mode = mode; game->mode = mode;
game->difficulty = difficulty; game->difficulty = difficulty;
game->allowed_versions = s->compatibility_groups.at(static_cast<size_t>(creator_c->version())); if (game_name_enables_full_crossplay(name)) {
game->allowed_versions = s->compatibility_groups.at(static_cast<size_t>(creator_c->version()));
} else {
game->allowed_versions = safe_default_compatibility_group_for_version(creator_c->version());
}
static_assert(NUM_VERSIONS == 14, "Don't forget to update the group compatibility restrictions"); static_assert(NUM_VERSIONS == 14, "Don't forget to update the group compatibility restrictions");
if (!allow_v1 || (difficulty == Difficulty::ULTIMATE) || (mode == GameMode::CHALLENGE) || (mode == GameMode::SOLO)) { if (!allow_v1 || (difficulty == Difficulty::ULTIMATE) || (mode == GameMode::CHALLENGE) || (mode == GameMode::SOLO)) {
game->forbid_version(Version::DC_NTE); game->forbid_version(Version::DC_NTE);