blob: 92bcedf2d9520dc02cdc639812b2721b03f1c5b3 (
plain)
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
|
/* $Id$ */
#include "setup.h"
#include "ares.h"
#include "ares_library_init.h"
#include "ares_private.h"
/* library-private global and unique instance vars */
#ifdef WIN32
fpGetNetworkParams_t fpGetNetworkParams = ZERO_NULL;
fpSystemFunction036_t fpSystemFunction036 = ZERO_NULL;
#endif
/* library-private global vars with source visibility restricted to this file */
static unsigned int ares_initialized;
static int ares_init_flags;
#ifdef WIN32
static HMODULE hnd_iphlpapi;
static HMODULE hnd_advapi32;
#endif
static int ares_win32_init(void)
{
#ifdef WIN32
hnd_iphlpapi = 0;
hnd_iphlpapi = LoadLibrary("iphlpapi.dll");
if (!hnd_iphlpapi)
return ARES_ELOADIPHLPAPI;
fpGetNetworkParams = (fpGetNetworkParams_t)
GetProcAddress(hnd_iphlpapi, "GetNetworkParams");
if (!fpGetNetworkParams)
{
FreeLibrary(hnd_iphlpapi);
return ARES_EADDRGetNetworkParams;
}
hnd_advapi32 = 0;
hnd_advapi32 = LoadLibrary("advapi32.dll");
if (!hnd_advapi32)
{
FreeLibrary(hnd_iphlpapi);
return ARES_ELOADADVAPI32;
}
fpSystemFunction036 = (fpSystemFunction036_t)
GetProcAddress(hnd_advapi32, "SystemFunction036");
if (!fpSystemFunction036)
{
FreeLibrary(hnd_advapi32);
FreeLibrary(hnd_iphlpapi);
return ARES_EADDRSYSTEMFUNCTION036;
}
#endif
return ARES_SUCCESS;
}
static void ares_win32_cleanup(void)
{
#ifdef WIN32
if (hnd_advapi32)
FreeLibrary(hnd_advapi32);
if (hnd_iphlpapi)
FreeLibrary(hnd_iphlpapi);
#endif
}
int ares_library_init(int flags)
{
int res;
if (ares_initialized)
return ARES_SUCCESS;
ares_initialized++;
if (flags & ARES_LIB_INIT_WIN32)
{
res = ares_win32_init();
if (res != ARES_SUCCESS)
return res;
}
ares_init_flags = flags;
return ARES_SUCCESS;
}
void ares_library_cleanup(void)
{
if (!ares_initialized)
return;
ares_initialized--;
if (ares_init_flags & ARES_LIB_INIT_WIN32)
ares_win32_cleanup();
ares_init_flags = ARES_LIB_INIT_NONE;
}
|
