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3 Copyright (C) 2004, 2005, 2006, 2015 GNUnet e.V.
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6 under the terms of the GNU General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
17 * @file util/os_network.c
18 * @brief function to determine available network interfaces
20 * @author Heikki Lindholm
23 * @author Christian Grothoff
26 #include "gnunet_util_lib.h"
29 #define LOG(kind,...) GNUNET_log_from (kind, "util-os-network", __VA_ARGS__)
30 #define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util-os-network", syscall, filename)
33 #if ! (HAVE_GETIFADDRS && HAVE_FREEIFADDRS) && !MINGW
35 * Try to enumerate all network interfaces using 'ifconfig'.
37 * @param proc the callback function
38 * @param proc_cls closure for @a proc
39 * @return #GNUNET_OK if it worked
42 try_ifconfig (GNUNET_OS_NetworkInterfaceProcessor proc,
55 struct sockaddr_in a4;
56 struct sockaddr_in6 a6;
59 struct sockaddr_in bcaddr;
60 struct sockaddr_in netmask;
61 struct sockaddr_in6 netmask6;
62 struct sockaddr *pass_bcaddr;
63 struct sockaddr *pass_netmask;
66 if (system ("ifconfig -a > /dev/null 2> /dev/null"))
67 if (0 == system ("/sbin/ifconfig -a > /dev/null 2> /dev/null"))
68 f = popen ("/sbin/ifconfig -a 2> /dev/null", "r");
72 f = popen ("ifconfig -a 2> /dev/null", "r");
75 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
84 while (NULL != fgets (line, sizeof (line), f))
86 if (strlen (line) == 0)
91 if (!isspace (line[0]))
93 have_ifc = (1 == SSCANF (line, "%11s", ifc)) ? GNUNET_YES : GNUNET_NO;
94 /* would end with ':' on OSX, fix it! */
95 if (ifc[strlen (ifc) - 1] == ':')
96 ifc[strlen (ifc) - 1] = '\0';
100 continue; /* strange input, hope for the best */
102 /* make parsing of ipv6 addresses easier */
103 for (replace = line; *replace != '\0'; replace++)
111 while (('\0' != *start) && (isspace (*start)))
114 /* Zero-out stack allocated values */
115 memset (addrstr, 0, 128);
116 memset (netmaskstr, 0, 128);
117 memset (bcstr, 0, 128);
121 (3 == SSCANF (start, "inet addr:%127s Bcast:%127s Mask:%127s", addrstr, bcstr, netmaskstr)) ||
122 (2 == SSCANF (start, "inet addr:%127s Mask:%127s", addrstr, netmaskstr)) ||
123 (2 == SSCANF (start, "inet6 addr:%127s %d", addrstr, &prefixlen)) ||
125 (1 == SSCANF (start, "inet %127s", addrstr)) ||
126 (1 == SSCANF (start, "inet6 %127s", addrstr)))
129 if (1 == inet_pton (AF_INET, addrstr, &v4))
131 memset (&a4, 0, sizeof (a4));
132 a4.sin_family = AF_INET;
133 #if HAVE_SOCKADDR_IN_SIN_LEN
134 a4.sin_len = (u_char) sizeof (struct sockaddr_in);
140 if (1 == inet_pton (AF_INET, bcstr, &v4))
142 memset (&bcaddr, 0, sizeof (bcaddr));
143 bcaddr.sin_family = AF_INET;
144 #if HAVE_SOCKADDR_IN_SIN_LEN
145 bcaddr.sin_len = (u_char) sizeof (struct sockaddr_in);
147 bcaddr.sin_addr = v4;
148 pass_bcaddr = (struct sockaddr *) &bcaddr;
150 if (1 == inet_pton (AF_INET, netmaskstr, &v4))
152 memset (&netmask, 0, sizeof (netmask));
153 netmask.sin_family = AF_INET;
154 #if HAVE_SOCKADDR_IN_SIN_LEN
155 netmask.sin_len = (u_char) sizeof (struct sockaddr_in);
157 netmask.sin_addr = v4;
158 pass_netmask = (struct sockaddr *) &netmask;
163 proc (proc_cls, ifc, 0 == strcmp (ifc, GNUNET_DEFAULT_INTERFACE),
164 (const struct sockaddr *) &a4,
165 pass_bcaddr, pass_netmask, sizeof (a4)))
170 if (1 == inet_pton (AF_INET6, addrstr, &v6))
172 memset (&a6, 0, sizeof (a6));
173 a6.sin6_family = AF_INET6;
174 #if HAVE_SOCKADDR_IN_SIN_LEN
175 a6.sin6_len = (u_char) sizeof (struct sockaddr_in6);
182 memset (v6.s6_addr, 0, sizeof (v6.s6_addr));
183 for (i = 0; i < prefixlen; i++)
185 v6.s6_addr[i >> 3] |= 1 << (i & 7);
187 memset (&netmask6, 0, sizeof (netmask6));
188 netmask6.sin6_family = AF_INET6;
189 #if HAVE_SOCKADDR_IN_SIN_LEN
190 netmask6.sin6_len = (u_char) sizeof (struct sockaddr_in6);
192 netmask6.sin6_addr = v6;
194 pass_netmask = (struct sockaddr *) &netmask6;
198 proc (proc_cls, ifc, 0 == strcmp (ifc, GNUNET_DEFAULT_INTERFACE),
199 (const struct sockaddr *) &a6,
200 NULL, pass_netmask, sizeof (a6)))
212 * Try to enumerate all network interfaces using 'ip'.
214 * @param proc the callback function
215 * @param proc_cls closure for @a proc
216 * @return #GNUNET_OK if it worked
219 try_ip (GNUNET_OS_NetworkInterfaceProcessor proc,
228 struct sockaddr_in a4;
229 struct sockaddr_in6 a6;
232 struct sockaddr_in netmask;
233 struct sockaddr_in6 netmask6;
235 unsigned int prefixlen;
237 f = popen ("ip -o add 2> /dev/null", "r");
240 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
243 return GNUNET_SYSERR;
246 while (NULL != fgets (line, sizeof (line), f))
248 /* make parsing easier */
249 for (replace = line; *replace != '\0'; replace++)
254 /* Zero-out stack allocated values */
255 memset (ifname, 0, 64);
256 memset (afstr, 0, 6);
257 memset (addrstr, 0, 128);
258 if (4 != SSCANF (line,
259 "%*u: %63s %5s %127s %6u",
266 if ( (0 == strcasecmp ("inet",
268 (1 == inet_pton (AF_INET,
272 memset (&a4, 0, sizeof (a4));
273 a4.sin_family = AF_INET;
274 #if HAVE_SOCKADDR_IN_SIN_LEN
275 a4.sin_len = (u_char) sizeof (struct sockaddr_in);
279 memset (&v4.s_addr, 0, sizeof (v4.s_addr));
280 for (i = 0; i < prefixlen; i++)
281 v4.s_addr |= 1 << (i & 7);
282 memset (&netmask, 0, sizeof (netmask));
283 netmask.sin_family = AF_INET;
284 #if HAVE_SOCKADDR_IN_SIN_LEN
285 netmask.sin_len = (u_char) sizeof (struct sockaddr_in);
287 netmask.sin_addr = v4;
292 (0 == strcmp (ifname,
293 GNUNET_DEFAULT_INTERFACE)),
294 (const struct sockaddr *) &a4,
296 (const struct sockaddr *) &netmask,
301 if ( (0 == strcasecmp ("inet6",
303 (1 == inet_pton (AF_INET6,
307 memset (&a6, 0, sizeof (a6));
308 a6.sin6_family = AF_INET6;
309 #if HAVE_SOCKADDR_IN_SIN_LEN
310 a6.sin6_len = (u_char) sizeof (struct sockaddr_in6);
314 memset (v6.s6_addr, 0, sizeof (v6.s6_addr));
315 for (i = 0; i < prefixlen; i++)
316 v6.s6_addr[i >> 3] |= 1 << (i & 7);
317 memset (&netmask6, 0, sizeof (netmask6));
318 netmask6.sin6_family = AF_INET6;
319 #if HAVE_SOCKADDR_IN_SIN_LEN
320 netmask6.sin6_len = (u_char) sizeof (struct sockaddr_in6);
322 netmask6.sin6_addr = v6;
327 (0 == strcmp (ifname,
328 GNUNET_DEFAULT_INTERFACE)),
329 (const struct sockaddr *) &a6,
331 (const struct sockaddr *) &netmask6,
343 * @brief Enumerate all network interfaces
345 * @param proc the callback function
346 * @param proc_cls closure for @a proc
349 GNUNET_OS_network_interfaces_list (GNUNET_OS_NetworkInterfaceProcessor proc,
355 struct EnumNICs3_results *results = NULL;
358 r = EnumNICs3 (&results, &results_count);
362 for (i = 0; i < results_count; i++)
365 proc (proc_cls, results[i].pretty_name, results[i].is_default,
366 (const struct sockaddr *) &results[i].address,
368 flags & ENUMNICS3_BCAST_OK ?
369 (const struct sockaddr *) &results[i].broadcast : NULL,
370 results[i].flags & ENUMNICS3_MASK_OK ?
371 (const struct sockaddr *) &results[i].mask : NULL,
372 results[i].addr_size))
375 EnumNICs3_free (results);
378 #elif HAVE_GETIFADDRS && HAVE_FREEIFADDRS
380 struct ifaddrs *ifa_first;
381 struct ifaddrs *ifa_ptr;
384 if (getifaddrs (&ifa_first) == 0)
386 for (ifa_ptr = ifa_first; ifa_ptr != NULL; ifa_ptr = ifa_ptr->ifa_next)
388 if (ifa_ptr->ifa_name != NULL && ifa_ptr->ifa_addr != NULL &&
389 (ifa_ptr->ifa_flags & IFF_UP) != 0)
391 if ((ifa_ptr->ifa_addr->sa_family != AF_INET) &&
392 (ifa_ptr->ifa_addr->sa_family != AF_INET6))
394 if (ifa_ptr->ifa_addr->sa_family == AF_INET)
395 alen = sizeof (struct sockaddr_in);
397 alen = sizeof (struct sockaddr_in6);
399 proc (proc_cls, ifa_ptr->ifa_name,
400 0 == strcmp (ifa_ptr->ifa_name, GNUNET_DEFAULT_INTERFACE),
401 ifa_ptr->ifa_addr, ifa_ptr->ifa_broadaddr,
402 ifa_ptr->ifa_netmask, alen))
406 freeifaddrs (ifa_first);
417 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
418 "Failed to enumerate network interfaces\n");
423 /* end of os_network.c */