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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* idletrack.c
*
* Authors: mrgentry @ http://www.experts-exchange.com
* Herman Bloggs <hermanator12002@yahoo.com>
* Date: February, 2003
* Description: Track user inactivity.
*
* Andrew Whewell <awhewell@users.sourceforge.net> - 25th June 2004. Added
* support for GetLastInputInfo under Windows 2000 and above. This avoids having
* IDLETRACK.DLL hook itself into every process on the machine, which makes
* upgrades easier. The hook mechanism is also used by key loggers, so not
* using hooks doesn't put the willys up programs that keep an eye out for
* loggers.
*
* Windows 9x doesn't have GetLastInputInfo - when Purple runs on these machines
* the code silently falls back onto the old hooking scheme.
*/
#define _WIN32_WINNT 0x0500
#include "idletrack.h"
#define EXPORT __declspec(dllexport)
static HANDLE hMapObject = NULL;
static DWORD *lastTime = NULL;
static HHOOK keyHook = NULL;
static HHOOK mouseHook = NULL;
static HINSTANCE g_hInstance = NULL;
static POINT g_point;
/* GetLastInputInfo address and module - if g_GetLastInputInfo == NULL then
* we fall back on the old "hook the world" method. GetLastInputInfo was brought
* in with Windows 2000 so Windows 9x will still hook everything.
*/
typedef BOOL (WINAPI *GETLASTINPUTINFO)(LASTINPUTINFO *);
static HMODULE g_user32 = NULL;
static GETLASTINPUTINFO g_GetLastInputInfo = NULL;
static DWORD* setup_shared_mem() {
BOOL fInit;
/* Set up the shared memory. */
hMapObject = CreateFileMapping((HANDLE) 0xFFFFFFFF, /* use paging file */
NULL, /* no security attributes */
PAGE_READWRITE, /* read/write access */
0, /* size: high 32-bits */
sizeof(DWORD), /* size: low 32-bits */
"timermem"); /* name of map object */
if(hMapObject == NULL)
return NULL;
/* The first process to attach initializes memory. */
fInit = (GetLastError() != ERROR_ALREADY_EXISTS);
/* Get a pointer to the file-mapped shared memory. */
lastTime = (DWORD*) MapViewOfFile(hMapObject, /* object to map view of */
FILE_MAP_WRITE, /* read/write access */
0, /* high offset: map from */
0, /* low offset: beginning */
0); /* default: map entire file */
if(lastTime == NULL)
return NULL;
*lastTime = GetTickCount();
return lastTime;
}
static LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam) {
if(!(code < 0)) {
if(lastTime == NULL)
lastTime = setup_shared_mem();
if(lastTime)
*lastTime = GetTickCount();
}
return CallNextHookEx(keyHook, code, wParam, lParam);
}
static LRESULT CALLBACK MouseProc(int code, WPARAM wParam, LPARAM lParam) {
/* We need to verify that the Mouse pointer has actually moved. */
if(!(code < 0) &&
!((g_point.x == ((MOUSEHOOKSTRUCT*) lParam)->pt.x) &&
(g_point.y == ((MOUSEHOOKSTRUCT*) lParam)->pt.y))) {
g_point.x = ((MOUSEHOOKSTRUCT*) lParam)->pt.x;
g_point.y = ((MOUSEHOOKSTRUCT*) lParam)->pt.y;
if(lastTime == NULL)
lastTime = setup_shared_mem();
if(lastTime)
*lastTime = GetTickCount();
}
return CallNextHookEx(mouseHook, code, wParam, lParam);
}
EXPORT DWORD winpidgin_get_lastactive() {
DWORD result = 0;
/* If we have GetLastInputInfo then use it, otherwise use the hooks*/
if(g_GetLastInputInfo != NULL) {
LASTINPUTINFO lii;
memset(&lii, 0, sizeof(lii));
lii.cbSize = sizeof(lii);
if(g_GetLastInputInfo(&lii)) {
result = lii.dwTime;
}
} else {
if(lastTime == NULL)
lastTime = setup_shared_mem();
if(lastTime)
result = *lastTime;
}
return result;
}
EXPORT BOOL winpidgin_set_idlehooks() {
/* Is GetLastInputInfo available?*/
g_user32 = LoadLibrary("user32.dll");
if(g_user32) {
g_GetLastInputInfo = (GETLASTINPUTINFO) GetProcAddress(g_user32, "GetLastInputInfo");
}
/* If we couldn't find GetLastInputInfo then fall back onto the hooking scheme*/
if(g_GetLastInputInfo == NULL) {
/* Set up the shared memory.*/
lastTime = setup_shared_mem();
if(lastTime == NULL)
return FALSE;
*lastTime = GetTickCount();
/* Set up the keyboard hook.*/
keyHook = SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, g_hInstance, 0);
if(keyHook == NULL) {
UnmapViewOfFile(lastTime);
CloseHandle(hMapObject);
return FALSE;
}
/* Set up the mouse hook.*/
mouseHook = SetWindowsHookEx(WH_MOUSE, MouseProc, g_hInstance, 0);
if(mouseHook == NULL) {
UnhookWindowsHookEx(keyHook);
UnmapViewOfFile(lastTime);
CloseHandle(hMapObject);
return FALSE;
}
}
return TRUE;
}
EXPORT void winpidgin_remove_idlehooks() {
if(g_user32 != NULL)
FreeLibrary(g_user32);
if(keyHook)
UnhookWindowsHookEx(keyHook);
if(mouseHook)
UnhookWindowsHookEx(mouseHook);
if(lastTime)
UnmapViewOfFile(lastTime);
if(hMapObject)
CloseHandle(hMapObject);
}
/* suppress gcc "no previous prototype" warning */
BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved);
BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved) {
switch(dwReason) {
case DLL_PROCESS_ATTACH:
g_hInstance = hInstance;
g_point.x = 0;
g_point.y = 0;
break;
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
|
