1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
#include "pch.h"
#include "playlist.h"
#include "concommand.h"
#include "convar.h"
#include "gameutils.h"
#include "hookutils.h"
#include "dedicated.h"
#include "squirrel.h"
typedef char (*Onclc_SetPlaylistVarOverrideType)(void* a1, void* a2);
Onclc_SetPlaylistVarOverrideType Onclc_SetPlaylistVarOverride;
typedef int (*GetCurrentGamemodeMaxPlayersType)();
GetCurrentGamemodeMaxPlayersType GetCurrentGamemodeMaxPlayers;
// function type defined in gameutils.h
SetPlaylistVarOverrideType SetPlaylistVarOverrideOriginal;
GetCurrentPlaylistVarType GetCurrentPlaylistVarOriginal;
ConVar* Cvar_ns_use_clc_SetPlaylistVarOverride;
void SetPlaylistCommand(const CCommand& args)
{
if (args.ArgC() < 2)
return;
SetCurrentPlaylist(args.Arg(1));
}
void SetPlaylistVarOverrideCommand(const CCommand& args)
{
if (args.ArgC() < 3)
return;
for (int i = 1; i < args.ArgC(); i += 2)
SetPlaylistVarOverride(args.Arg(i), args.Arg(i + 1));
}
char Onclc_SetPlaylistVarOverrideHook(void* a1, void* a2)
{
// the private_match playlist is the only situation where there should be any legitimate sending of this netmessage
// todo: check mp_lobby here too
if (!Cvar_ns_use_clc_SetPlaylistVarOverride->m_nValue || strcmp(GetCurrentPlaylistName(), "private_match"))
return 1;
return Onclc_SetPlaylistVarOverride(a1, a2);
}
void SetPlaylistVarOverrideHook(const char* varName, const char* value)
{
if (strlen(value) >= 64)
return;
SetPlaylistVarOverrideOriginal(varName, value);
}
char* GetCurrentPlaylistVarHook(const char* varName, bool useOverrides)
{
if (!useOverrides && !strcmp(varName, "max_players"))
useOverrides = true;
return GetCurrentPlaylistVarOriginal(varName, useOverrides);
}
int GetCurrentGamemodeMaxPlayersHook()
{
char* maxPlayersStr = GetCurrentPlaylistVar("max_players", 0);
if (!maxPlayersStr)
return GetCurrentGamemodeMaxPlayers();
int maxPlayers = atoi(maxPlayersStr);
return maxPlayers;
}
void InitialisePlaylistHooks(HMODULE baseAddress)
{
RegisterConCommand("setplaylist", SetPlaylistCommand, "Sets the current playlist", FCVAR_NONE);
RegisterConCommand("setplaylistvaroverrides", SetPlaylistVarOverrideCommand, "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 = RegisterConVar(
"ns_use_clc_SetPlaylistVarOverride", "0", FCVAR_GAMEDLL, "Whether the server should accept clc_SetPlaylistVarOverride messages");
HookEnabler hook;
ENABLER_CREATEHOOK(
hook, (char*)baseAddress + 0x222180, &Onclc_SetPlaylistVarOverrideHook, reinterpret_cast<LPVOID*>(&Onclc_SetPlaylistVarOverride));
ENABLER_CREATEHOOK(
hook, (char*)baseAddress + 0x18ED00, &SetPlaylistVarOverrideHook, reinterpret_cast<LPVOID*>(&SetPlaylistVarOverrideOriginal));
ENABLER_CREATEHOOK(
hook, (char*)baseAddress + 0x18C680, &GetCurrentPlaylistVarHook, reinterpret_cast<LPVOID*>(&GetCurrentPlaylistVarOriginal));
ENABLER_CREATEHOOK(
hook, (char*)baseAddress + 0x18C430, &GetCurrentGamemodeMaxPlayersHook, reinterpret_cast<LPVOID*>(&GetCurrentGamemodeMaxPlayers));
// 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
{
void* ptr = (char*)baseAddress + 0x18ED8D;
TempReadWrite rw(ptr);
*((char*)ptr) = (char)0xC3; // jmp => ret
}
if (IsDedicated())
{
// patch to allow setplaylistvaroverride to be called before map init on dedicated
void* ptr = (char*)baseAddress + 0x18ED17;
TempReadWrite rw(ptr);
*((char*)ptr) = (char)0x90;
*((char*)ptr + 1) = (char)0x90;
*((char*)ptr + 2) = (char)0x90;
*((char*)ptr + 3) = (char)0x90;
*((char*)ptr + 4) = (char)0x90;
*((char*)ptr + 5) = (char)0x90;
}
}
|
