2 * Copyright (c) 1996, 1998-2005, 2007-2010
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Sponsored in part by the Defense Advanced Research Projects
18 * Agency (DARPA) and Air Force Research Laboratory, Air Force
19 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
23 * Suppress a warning w/ gcc on Digital UN*X.
24 * The system headers should really do this....
26 #if defined(__osf__) && !defined(__cplusplus)
33 #include <sys/types.h>
34 #include <sys/socket.h>
35 #include <sys/param.h>
37 #include <sys/ioctl.h>
38 #if defined(HAVE_SYS_SOCKIO_H) && !defined(SIOCGIFCONF)
39 # include <sys/sockio.h>
49 #endif /* STDC_HEADERS */
51 # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
55 #endif /* HAVE_STRING_H */
58 #endif /* HAVE_STRINGS_H */
61 #endif /* HAVE_UNISTD_H */
65 # include <sys/stream.h>
66 # include <sys/sioctl.h>
67 # include <sys/stropts.h>
68 # define STRSET(cmd, param, len) {strioctl.ic_cmd=(cmd);\
69 strioctl.ic_dp=(param);\
70 strioctl.ic_timout=0;\
71 strioctl.ic_len=(len);}
74 # include <net/soioctl.h>
76 #include <netinet/in.h>
77 #include <arpa/inet.h>
79 #ifdef HAVE_GETIFADDRS
87 #define DEFAULT_TEXT_DOMAIN "sudo"
90 /* Minix apparently lacks IFF_LOOPBACK */
92 # define IFF_LOOPBACK 0
95 #ifndef INET6_ADDRSTRLEN
96 # define INET6_ADDRSTRLEN 46
99 #ifdef HAVE_GETIFADDRS
102 * Fill in the interfaces string with the machine's ip addresses and netmasks
103 * and return the number of interfaces found.
106 get_net_ifs(char **addrinfo)
108 struct ifaddrs *ifa, *ifaddrs;
109 struct sockaddr_in *sin;
111 struct sockaddr_in6 *sin6;
112 char addrbuf[INET6_ADDRSTRLEN];
114 int ailen, i, len, num_interfaces = 0;
117 if (getifaddrs(&ifaddrs))
120 /* Allocate space for the interfaces info string. */
121 for (ifa = ifaddrs; ifa != NULL; ifa = ifa -> ifa_next) {
122 /* Skip interfaces marked "down" and "loopback". */
123 if (ifa->ifa_addr == NULL || ifa->ifa_netmask == NULL ||
124 !ISSET(ifa->ifa_flags, IFF_UP) || ISSET(ifa->ifa_flags, IFF_LOOPBACK))
127 switch (ifa->ifa_addr->sa_family) {
136 if (num_interfaces == 0)
138 ailen = num_interfaces * 2 * INET6_ADDRSTRLEN;
139 *addrinfo = cp = emalloc(ailen);
141 /* Store the IP addr/netmask pairs. */
142 for (ifa = ifaddrs, i = 0; ifa != NULL; ifa = ifa -> ifa_next) {
143 /* Skip interfaces marked "down" and "loopback". */
144 if (ifa->ifa_addr == NULL || ifa->ifa_netmask == NULL ||
145 !ISSET(ifa->ifa_flags, IFF_UP) || ISSET(ifa->ifa_flags, IFF_LOOPBACK))
148 switch (ifa->ifa_addr->sa_family) {
150 sin = (struct sockaddr_in *)ifa->ifa_addr;
151 len = snprintf(cp, ailen - (*addrinfo - cp),
152 "%s%s/", cp == *addrinfo ? "" : " ",
153 inet_ntoa(sin->sin_addr));
154 if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
155 warningx(_("load_interfaces: overflow detected"));
160 sin = (struct sockaddr_in *)ifa->ifa_netmask;
161 len = snprintf(cp, ailen - (*addrinfo - cp),
162 "%s", inet_ntoa(sin->sin_addr));
163 if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
164 warningx(_("load_interfaces: overflow detected"));
171 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
172 inet_ntop(AF_INET6, &sin6->sin6_addr, addrbuf, sizeof(addrbuf));
173 len = snprintf(cp, ailen - (*addrinfo - cp),
174 "%s%s/", cp == *addrinfo ? "" : " ", addrbuf);
175 if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
176 warningx(_("load_interfaces: overflow detected"));
181 sin6 = (struct sockaddr_in6 *)ifa->ifa_netmask;
182 inet_ntop(AF_INET6, &sin6->sin6_addr, addrbuf, sizeof(addrbuf));
183 len = snprintf(cp, ailen - (*addrinfo - cp), "%s", addrbuf);
184 if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
185 warningx(_("load_interfaces: overflow detected"));
190 #endif /* HAVE_IN6_ADDR */
195 #ifdef HAVE_FREEIFADDRS
196 freeifaddrs(ifaddrs);
200 return num_interfaces;
203 #elif defined(SIOCGIFCONF) && !defined(STUB_LOAD_INTERFACES)
206 * Allocate and fill in the interfaces global variable with the
207 * machine's ip addresses and netmasks.
210 get_net_ifs(char **addrinfo)
212 struct ifconf *ifconf;
213 struct ifreq *ifr, ifr_tmp;
214 struct sockaddr_in *sin;
215 int ailen, i, len, n, sock, num_interfaces = 0;
216 size_t buflen = sizeof(struct ifconf) + BUFSIZ;
217 char *cp, *previfname = "", *ifconf_buf = NULL;
219 struct strioctl strioctl;
222 sock = socket(AF_INET, SOCK_DGRAM, 0);
224 error(1, _("unable to open socket"));
227 * Get interface configuration or return.
230 ifconf_buf = emalloc(buflen);
231 ifconf = (struct ifconf *) ifconf_buf;
232 ifconf->ifc_len = buflen - sizeof(struct ifconf);
233 ifconf->ifc_buf = (caddr_t) (ifconf_buf + sizeof(struct ifconf));
236 STRSET(SIOCGIFCONF, (caddr_t) ifconf, buflen);
237 if (ioctl(sock, I_STR, (caddr_t) &strioctl) < 0)
239 /* Note that some kernels return EINVAL if the buffer is too small */
240 if (ioctl(sock, SIOCGIFCONF, (caddr_t) ifconf) < 0 && errno != EINVAL)
244 /* Break out of loop if we have a big enough buffer. */
245 if (ifconf->ifc_len + sizeof(struct ifreq) < buflen)
251 /* Allocate space for the maximum number of interfaces that could exist. */
252 if ((n = ifconf->ifc_len / sizeof(struct ifreq)) == 0)
254 ailen = n * 2 * INET6_ADDRSTRLEN;
255 *addrinfo = cp = emalloc(ailen);
257 /* For each interface, store the ip address and netmask. */
258 for (i = 0; i < ifconf->ifc_len; ) {
259 /* Get a pointer to the current interface. */
260 ifr = (struct ifreq *) &ifconf->ifc_buf[i];
262 /* Set i to the subscript of the next interface. */
263 i += sizeof(struct ifreq);
265 if (ifr->ifr_addr.sa_len > sizeof(ifr->ifr_addr))
266 i += ifr->ifr_addr.sa_len - sizeof(struct sockaddr);
267 #endif /* HAVE_SA_LEN */
269 /* Skip duplicates and interfaces with NULL addresses. */
270 sin = (struct sockaddr_in *) &ifr->ifr_addr;
271 if (sin->sin_addr.s_addr == 0 ||
272 strncmp(previfname, ifr->ifr_name, sizeof(ifr->ifr_name) - 1) == 0)
275 if (ifr->ifr_addr.sa_family != AF_INET)
279 memset(&ifr_tmp, 0, sizeof(ifr_tmp));
280 strncpy(ifr_tmp.ifr_name, ifr->ifr_name, sizeof(ifr_tmp.ifr_name) - 1);
281 if (ioctl(sock, SIOCGIFFLAGS, (caddr_t) &ifr_tmp) < 0)
285 /* Skip interfaces marked "down" and "loopback". */
286 if (!ISSET(ifr_tmp.ifr_flags, IFF_UP) ||
287 ISSET(ifr_tmp.ifr_flags, IFF_LOOPBACK))
290 sin = (struct sockaddr_in *) &ifr->ifr_addr;
291 len = snprintf(cp, ailen - (*addrinfo - cp),
292 "%s%s/", cp == *addrinfo ? "" : " ",
293 inet_ntoa(sin->sin_addr));
294 if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
295 warningx(_("load_interfaces: overflow detected"));
300 /* Stash the name of the interface we saved. */
301 previfname = ifr->ifr_name;
303 /* Get the netmask. */
304 memset(&ifr_tmp, 0, sizeof(ifr_tmp));
305 strncpy(ifr_tmp.ifr_name, ifr->ifr_name, sizeof(ifr_tmp.ifr_name) - 1);
307 STRSET(SIOCGIFNETMASK, (caddr_t) &ifr_tmp, sizeof(ifr_tmp));
308 if (ioctl(sock, I_STR, (caddr_t) &strioctl) < 0) {
310 if (ioctl(sock, SIOCGIFNETMASK, (caddr_t) &ifr_tmp) < 0) {
312 sin = (struct sockaddr_in *) &ifr_tmp.ifr_addr;
313 sin->sin_addr.s_addr = htonl(IN_CLASSC_NET);
315 sin = (struct sockaddr_in *) &ifr_tmp.ifr_addr;
316 len = snprintf(cp, ailen - (*addrinfo - cp),
317 "%s", inet_ntoa(sin->sin_addr));
318 if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
319 warningx(_("load_interfaces: overflow detected"));
330 return num_interfaces;
333 #else /* !SIOCGIFCONF || STUB_LOAD_INTERFACES */
336 * Stub function for those without SIOCGIFCONF or getifaddrs()
339 get_net_ifs(char **addrinfo)
344 #endif /* SIOCGIFCONF && !STUB_LOAD_INTERFACES */