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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#include "winlite.h"
#undef _UNICODE
#include <interface.h>
#include "icvar.h"
#include "convar.h"
#include "detours.h"
#include "GMLuaModule.h"
extern "C"
{
#include "lua.h"
}
GMOD_MODULE(Init, Shutdown);
static ICvar *g_pCVar = NULL;
lua_State *(lua_newstateOriginal)(lua_Alloc, void *);
lua_State *(* lua_newstateDetour)(lua_Alloc, void *);
lua_State *(* lua_newstateTramp)(lua_Alloc, void *);
DETOUR_TRAMPOLINE_EMPTY(lua_State *(lua_newstateOriginal)(lua_Alloc, void *));
static lua_State *currentState = NULL;
lua_State *lua_newstateNew(lua_Alloc f, void *ud)
{
lua_State* L = lua_newstateOriginal(f, ud);
currentState = L;
return L;
}
typedef struct LoadS {
const char *s;
size_t size;
} LoadS;
static const char *getS (lua_State *L, void *ud, size_t *size) {
LoadS *ls = (LoadS *)ud;
(void)L;
if (ls->size == 0) return NULL;
*size = ls->size;
ls->size = 0;
return ls->s;
}
void LoadLua(const CCommand &command)
{
if(currentState == NULL)
return;
// util.RelativePathToFull( path )
lua_getglobal(currentState, "util");
lua_pushstring(currentState, "RelativePathToFull");
lua_gettable(currentState, -2);
lua_pushstring(currentState, command.ArgS());
if(lua_pcall(currentState, 1, 1, 0) != 0)
{
lua_pop(currentState, 1);
return;
}
const char *fullpath = lua_tostring(currentState, -1);
lua_pop(currentState, 2);
FILE *f = fopen(fullpath, "rb");
if(f == NULL)
return;
fseek(f, 0, SEEK_END);
long size = ftell(f);
rewind(f);
char *data = (char *)malloc(size);
fread(data, 1, size, f);
fclose(f);
// The game will think any calls from this code are coming from the base gamemodes cl_init.lua
//luaL_loadbuffer(currentState, data, size, "gamemodes\\base\\gamemode\\cl_init.lua");
LoadS ls;
ls.s = data;
ls.size = size;
lua_load(currentState, getS, &ls, "gamemodes\\base\\gamemode\\cl_init.lua");
lua_pcall(currentState, 0, 0, 0);
free(data);
}
static ConCommand *cmd;
int Init(void)
{
lua_newstateDetour = &lua_newstateNew;
lua_newstateTramp = &lua_newstateOriginal;
// Detour the lua_newstate function from lua_shared.dll so we can capture the lua_State when its created.
DetourFunctionWithEmptyTrampoline(*(PBYTE *) &lua_newstateTramp, (PBYTE) &lua_newstate, *(PBYTE *) &lua_newstateDetour);
g_pCVar = *(ICvar **)GetProcAddress(GetModuleHandleA("client.dll"), "cvar");
cmd = new ConCommand("lua_se2_load", LoadLua, "", FCVAR_UNREGISTERED);
g_pCVar->RegisterConCommand(cmd);
return 0;
}
int Shutdown(void)
{
DetourRemove(*(PBYTE*) &lua_newstateOriginal, *(PBYTE*) &lua_newstateDetour);
g_pCVar->UnregisterConCommand(cmd);
delete cmd;
return 0;
}
| |
