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-rw-r--r--NorthstarDLL/shared/playlist.cpp130
1 files changed, 130 insertions, 0 deletions
diff --git a/NorthstarDLL/shared/playlist.cpp b/NorthstarDLL/shared/playlist.cpp
new file mode 100644
index 00000000..2fb856b3
--- /dev/null
+++ b/NorthstarDLL/shared/playlist.cpp
@@ -0,0 +1,130 @@
+#include "pch.h"
+#include "playlist.h"
+#include "core/convar/concommand.h"
+#include "core/convar/convar.h"
+#include "squirrel/squirrel.h"
+#include "engine/hoststate.h"
+#include "server/serverpresence.h"
+
+AUTOHOOK_INIT()
+
+// use the R2 namespace for game funcs
+namespace R2
+{
+ const char* (*GetCurrentPlaylistName)();
+ void (*SetCurrentPlaylist)(const char* pPlaylistName);
+ void (*SetPlaylistVarOverride)(const char* pVarName, const char* pValue);
+ const char* (*GetCurrentPlaylistVar)(const char* pVarName, bool bUseOverrides);
+} // namespace R2
+
+ConVar* Cvar_ns_use_clc_SetPlaylistVarOverride;
+
+// clang-format off
+AUTOHOOK(clc_SetPlaylistVarOverride__Process, engine.dll + 0x222180,
+char, __fastcall, (void* a1, void* a2))
+// clang-format on
+{
+ // the private_match playlist on mp_lobby is the only situation where there should be any legitimate sending of this netmessage
+ if (!Cvar_ns_use_clc_SetPlaylistVarOverride->GetBool() || strcmp(R2::GetCurrentPlaylistName(), "private_match") ||
+ strcmp(R2::g_pHostState->m_levelName, "mp_lobby"))
+ return 1;
+
+ return clc_SetPlaylistVarOverride__Process(a1, a2);
+}
+
+// clang-format off
+AUTOHOOK(SetCurrentPlaylist, engine.dll + 0x18EB20,
+bool, __fastcall, (const char* pPlaylistName))
+// clang-format on
+{
+ bool bSuccess = SetCurrentPlaylist(pPlaylistName);
+
+ if (bSuccess)
+ {
+ spdlog::info("Set playlist to {}", R2::GetCurrentPlaylistName());
+ g_pServerPresence->SetPlaylist(R2::GetCurrentPlaylistName());
+ }
+
+ return bSuccess;
+}
+
+// clang-format off
+AUTOHOOK(SetPlaylistVarOverride, engine.dll + 0x18ED00,
+void, __fastcall, (const char* pVarName, const char* pValue))
+// clang-format on
+{
+ if (strlen(pValue) >= 64)
+ return;
+
+ SetPlaylistVarOverride(pVarName, pValue);
+}
+
+// clang-format off
+AUTOHOOK(GetCurrentPlaylistVar, engine.dll + 0x18C680,
+const char*, __fastcall, (const char* pVarName, bool bUseOverrides))
+// clang-format on
+{
+ if (!bUseOverrides && !strcmp(pVarName, "max_players"))
+ bUseOverrides = true;
+
+ return GetCurrentPlaylistVar(pVarName, bUseOverrides);
+}
+
+// clang-format off
+AUTOHOOK(GetCurrentGamemodeMaxPlayers, engine.dll + 0x18C430,
+int, __fastcall, ())
+// clang-format on
+{
+ const char* pMaxPlayers = R2::GetCurrentPlaylistVar("max_players", 0);
+ if (!pMaxPlayers)
+ return GetCurrentGamemodeMaxPlayers();
+
+ int iMaxPlayers = atoi(pMaxPlayers);
+ return iMaxPlayers;
+}
+
+void ConCommand_playlist(const CCommand& args)
+{
+ if (args.ArgC() < 2)
+ return;
+
+ R2::SetCurrentPlaylist(args.Arg(1));
+}
+
+void ConCommand_setplaylistvaroverride(const CCommand& args)
+{
+ if (args.ArgC() < 3)
+ return;
+
+ for (int i = 1; i < args.ArgC(); i += 2)
+ R2::SetPlaylistVarOverride(args.Arg(i), args.Arg(i + 1));
+}
+
+ON_DLL_LOAD_RELIESON("engine.dll", PlaylistHooks, (ConCommand, ConVar), (CModule module))
+{
+ AUTOHOOK_DISPATCH()
+
+ R2::GetCurrentPlaylistName = module.Offset(0x18C640).As<const char* (*)()>();
+ R2::SetCurrentPlaylist = module.Offset(0x18EB20).As<void (*)(const char*)>();
+ R2::SetPlaylistVarOverride = module.Offset(0x18ED00).As<void (*)(const char*, const char*)>();
+ R2::GetCurrentPlaylistVar = module.Offset(0x18C680).As<const char* (*)(const char*, bool)>();
+
+ // playlist is the name of the command on respawn servers, but we already use setplaylist so can't get rid of it
+ RegisterConCommand("playlist", ConCommand_playlist, "Sets the current playlist", FCVAR_NONE);
+ RegisterConCommand("setplaylist", ConCommand_playlist, "Sets the current playlist", FCVAR_NONE);
+ RegisterConCommand("setplaylistvaroverrides", ConCommand_setplaylistvaroverride, "sets a playlist var override", FCVAR_NONE);
+
+ // note: clc_SetPlaylistVarOverride is pretty insecure, since it allows for entirely arbitrary playlist var overrides to be sent to the
+ // server, this is somewhat restricted on custom servers to prevent it being done outside of private matches, but ideally it should be
+ // disabled altogether, since the custom menus won't use it anyway this should only really be accepted if you want vanilla client
+ // compatibility
+ Cvar_ns_use_clc_SetPlaylistVarOverride = new ConVar(
+ "ns_use_clc_SetPlaylistVarOverride", "0", FCVAR_GAMEDLL, "Whether the server should accept clc_SetPlaylistVarOverride messages");
+
+ // patch to prevent clc_SetPlaylistVarOverride from being able to crash servers if we reach max overrides due to a call to Error (why is
+ // this possible respawn, wtf) todo: add a warning for this
+ module.Offset(0x18ED8D).Patch("C3");
+
+ // patch to allow setplaylistvaroverride to be called before map init on dedicated and private match launched through the game
+ module.Offset(0x18ED17).NOP(6);
+}