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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
/*
This file is part of GNUnet.
Copyright (C) 2004, 2005, 2006 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file util/os_network.c
* @brief function to determine available network interfaces
* @author Nils Durner
* @author Heikki Lindholm
* @author Jake Dust
* @author LRN
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
/**
* @brief Enumerate all network interfaces
*
* @param proc the callback function
* @param proc_cls closure for @a proc
*/
void
GNUNET_OS_network_interfaces_list (GNUNET_OS_NetworkInterfaceProcessor proc,
void *proc_cls)
{
#ifdef MINGW
int r;
int i;
struct EnumNICs3_results *results = NULL;
int results_count;
r = EnumNICs3 (&results, &results_count);
if (r != GNUNET_OK)
return;
for (i = 0; i < results_count; i++)
{
if (GNUNET_OK !=
proc (proc_cls, results[i].pretty_name, results[i].is_default,
(const struct sockaddr *) &results[i].address,
results[i].
flags & ENUMNICS3_BCAST_OK ?
(const struct sockaddr *) &results[i].broadcast : NULL,
results[i].flags & ENUMNICS3_MASK_OK ?
(const struct sockaddr *) &results[i].mask : NULL,
results[i].addr_size))
break;
}
EnumNICs3_free (results);
return;
#elif HAVE_GETIFADDRS && HAVE_FREEIFADDRS
struct ifaddrs *ifa_first;
struct ifaddrs *ifa_ptr;
socklen_t alen;
if (getifaddrs (&ifa_first) == 0)
{
for (ifa_ptr = ifa_first; ifa_ptr != NULL; ifa_ptr = ifa_ptr->ifa_next)
{
if (ifa_ptr->ifa_name != NULL && ifa_ptr->ifa_addr != NULL &&
(ifa_ptr->ifa_flags & IFF_UP) != 0)
{
if ((ifa_ptr->ifa_addr->sa_family != AF_INET) &&
(ifa_ptr->ifa_addr->sa_family != AF_INET6))
continue;
if (ifa_ptr->ifa_addr->sa_family == AF_INET)
alen = sizeof (struct sockaddr_in);
else
alen = sizeof (struct sockaddr_in6);
if (GNUNET_OK !=
proc (proc_cls, ifa_ptr->ifa_name,
0 == strcmp (ifa_ptr->ifa_name, GNUNET_DEFAULT_INTERFACE),
ifa_ptr->ifa_addr, ifa_ptr->ifa_broadaddr,
ifa_ptr->ifa_netmask, alen))
break;
}
}
freeifaddrs (ifa_first);
}
#else
int i;
char line[1024];
char *replace;
const char *start;
char ifc[12];
char addrstr[128];
char bcstr[128];
char netmaskstr[128];
FILE *f;
int have_ifc;
struct sockaddr_in a4;
struct sockaddr_in6 a6;
struct in_addr v4;
struct in6_addr v6;
struct sockaddr_in bcaddr;
struct sockaddr_in netmask;
struct sockaddr_in6 netmask6;
struct sockaddr *pass_bcaddr;
struct sockaddr *pass_netmask;
int prefixlen;
if (system ("ifconfig -a > /dev/null 2> /dev/null"))
if (system ("/sbin/ifconfig -a > /dev/null 2> /dev/null") == 0)
f = popen ("/sbin/ifconfig -a 2> /dev/null", "r");
else
f = NULL;
else
f = popen ("ifconfig -a 2> /dev/null", "r");
if (!f)
{
LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
"popen", "ifconfig");
return;
}
have_ifc = GNUNET_NO;
ifc[11] = '\0';
while (NULL != fgets (line, sizeof (line), f))
{
if (strlen (line) == 0)
{
have_ifc = GNUNET_NO;
continue;
}
if (!isspace (line[0]))
{
have_ifc = (1 == SSCANF (line, "%11s", ifc)) ? GNUNET_YES : GNUNET_NO;
/* would end with ':' on OSX, fix it! */
if (ifc[strlen (ifc) - 1] == ':')
ifc[strlen (ifc) - 1] = '\0';
continue;
}
if (!have_ifc)
continue; /* strange input, hope for the best */
/* make parsing of ipv6 addresses easier */
for (replace = line; *replace != '\0'; replace++)
{
if (*replace == '/')
*replace = ' ';
}
prefixlen = -1;
start = line;
while (('\0' != *start) && (isspace (*start)))
start++;
/* Zero-out stack allocated values */
memset (addrstr, 0, 128);
memset (netmaskstr, 0, 128);
memset (bcstr, 0, 128);
prefixlen = 0;
if ( /* Linux */
(3 == SSCANF (start, "inet addr:%127s Bcast:%127s Mask:%127s", addrstr, bcstr, netmaskstr)) ||
(2 == SSCANF (start, "inet addr:%127s Mask:%127s", addrstr, netmaskstr)) ||
(2 == SSCANF (start, "inet6 addr:%127s %d", addrstr, &prefixlen)) ||
/* Solaris, OS X */
(1 == SSCANF (start, "inet %127s", addrstr)) ||
(1 == SSCANF (start, "inet6 %127s", addrstr)))
{
/* IPv4 */
if (1 == inet_pton (AF_INET, addrstr, &v4))
{
memset (&a4, 0, sizeof (a4));
a4.sin_family = AF_INET;
#if HAVE_SOCKADDR_IN_SIN_LEN
a4.sin_len = (u_char) sizeof (struct sockaddr_in);
#endif
a4.sin_addr = v4;
pass_bcaddr = NULL;
pass_netmask = NULL;
if (1 == inet_pton (AF_INET, bcstr, &v4))
{
memset (&bcaddr, 0, sizeof (bcaddr));
bcaddr.sin_family = AF_INET;
#if HAVE_SOCKADDR_IN_SIN_LEN
bcaddr.sin_len = (u_char) sizeof (struct sockaddr_in);
#endif
bcaddr.sin_addr = v4;
pass_bcaddr = (struct sockaddr *) &bcaddr;
}
if (1 == inet_pton (AF_INET, netmaskstr, &v4))
{
memset (&netmask, 0, sizeof (netmask));
netmask.sin_family = AF_INET;
#if HAVE_SOCKADDR_IN_SIN_LEN
netmask.sin_len = (u_char) sizeof (struct sockaddr_in);
#endif
netmask.sin_addr = v4;
pass_netmask = (struct sockaddr *) &netmask;
}
if (GNUNET_OK !=
proc (proc_cls, ifc, 0 == strcmp (ifc, GNUNET_DEFAULT_INTERFACE),
(const struct sockaddr *) &a4,
pass_bcaddr, pass_netmask, sizeof (a4)))
break;
continue;
}
/* IPv6 */
if (1 == inet_pton (AF_INET6, addrstr, &v6))
{
memset (&a6, 0, sizeof (a6));
a6.sin6_family = AF_INET6;
#if HAVE_SOCKADDR_IN_SIN_LEN
a6.sin6_len = (u_char) sizeof (struct sockaddr_in6);
#endif
a6.sin6_addr = v6;
pass_netmask = NULL;
if (prefixlen != -1)
{
memset (v6.s6_addr, 0, sizeof (v6.s6_addr));
for (i = 0; i < prefixlen; i++)
{
v6.s6_addr[i >> 3] |= 1 << (i & 7);
}
memset (&netmask6, 0, sizeof (netmask6));
netmask6.sin6_family = AF_INET6;
#if HAVE_SOCKADDR_IN_SIN_LEN
netmask6.sin6_len = (u_char) sizeof (struct sockaddr_in6);
#endif
netmask6.sin6_addr = v6;
pass_netmask = (struct sockaddr *) &netmask6;
}
if (GNUNET_OK !=
proc (proc_cls, ifc, 0 == strcmp (ifc, GNUNET_DEFAULT_INTERFACE),
(const struct sockaddr *) &a6,
NULL, pass_netmask, sizeof (a6)))
break;
continue;
}
}
}
pclose (f);
#endif
}
/* end of os_network.c */
|
