diff options
Diffstat (limited to 'NorthstarDLL/playlist.cpp')
| -rw-r--r-- | NorthstarDLL/playlist.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/NorthstarDLL/playlist.cpp b/NorthstarDLL/playlist.cpp new file mode 100644 index 00000000..27ca6be1 --- /dev/null +++ b/NorthstarDLL/playlist.cpp @@ -0,0 +1,114 @@ +#include "pch.h" +#include "playlist.h" +#include "NSMem.h" +#include "concommand.h" +#include "convar.h" +#include "squirrel.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; + +AUTOHOOK(clc_SetPlaylistVarOverride__Process, engine.dll + 0x222180, +char,, (void* a1, void* a2), +{ + // the private_match playlist is the only situation where there should be any legitimate sending of this netmessage + // todo: check map == mp_lobby here too + if (!Cvar_ns_use_clc_SetPlaylistVarOverride->GetBool() || strcmp(R2::GetCurrentPlaylistName(), "private_match")) + return 1; + + return clc_SetPlaylistVarOverride__Process(a1, a2); +}) + +AUTOHOOK(SetCurrentPlaylist, engine.dll + 0x18EB20, +void,, (const char* pPlaylistName), +{ + SetCurrentPlaylist(pPlaylistName); + spdlog::info("Set playlist to {}", pPlaylistName); +}) + +AUTOHOOK(SetPlaylistVarOverride, engine.dll + 0x18ED00, +void,, (const char* pVarName, const char* pValue), +{ + if (strlen(pValue) >= 64) + return; + + SetPlaylistVarOverride(pVarName, pValue); +}) + +AUTOHOOK(GetCurrentPlaylistVar, engine.dll + 0x18C680, +const char*,, (const char* pVarName, bool bUseOverrides), +{ + if (!bUseOverrides && !strcmp(pVarName, "max_players")) + bUseOverrides = true; + + return GetCurrentPlaylistVar(pVarName, bUseOverrides); +}) + + +AUTOHOOK(GetCurrentGamemodeMaxPlayers, engine.dll + 0x18C430, +int,, (), +{ + 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, [](HMODULE baseAddress) +{ + AUTOHOOK_DISPATCH() + + R2::GetCurrentPlaylistName = (const char* (*)())((char*)baseAddress + 0x18C640); + R2::SetCurrentPlaylist = (void (*)(const char*))((char*)baseAddress + 0x18EB20); + R2::SetPlaylistVarOverride = (void (*)(const char*, const char*))((char*)baseAddress + 0x18ED00); + R2::GetCurrentPlaylistVar = (const char* (*)(const char*, bool))((char*)baseAddress + 0x18C680); + + // 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 + NSMem::BytePatch((uintptr_t)baseAddress + 0x18ED8D, "C3"); + + // patch to allow setplaylistvaroverride to be called before map init on dedicated and private match launched through the game + NSMem::NOP((uintptr_t)baseAddress + 0x18ED17, 6); +})
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