1 /* $KAME: if.c,v 1.15 2001/05/22 06:04:17 jinmei Exp $ */
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $FreeBSD: src/usr.sbin/rtsold/if.c,v 1.2.2.3 2001/07/03 11:02:16 ume Exp $
32 * $DragonFly: src/usr.sbin/rtsold/if.c,v 1.6 2005/12/05 00:56:37 swildner Exp $
35 #include <sys/param.h>
36 #include <sys/socket.h>
37 #include <sys/sysctl.h>
38 #include <sys/ioctl.h>
39 #include <sys/queue.h>
42 #if defined(__DragonFly__)
43 #include <net/if_var.h>
44 #endif /* __DragonFly__ >= 3 */
45 #include <net/if_types.h>
46 #include <net/route.h>
47 #include <net/if_dl.h>
48 #include <net/if_media.h>
50 # include <net/ethernet.h>
53 #include <net/if_ether.h>
55 #if defined(__bsdi__) || defined(__OpenBSD__)
56 # include <netinet/in.h>
57 # include <netinet/if_ether.h>
59 #include <netinet/in.h>
60 #include <netinet/icmp6.h>
62 #include <netinet6/in6_var.h>
72 #ifdef HAVE_GETIFADDRS
81 static int get_llflag(const char *name);
82 #ifndef HAVE_GETIFADDRS
83 static unsigned int if_maxindex(void);
85 static void get_rtaddrs(int addrs, struct sockaddr *sa,
86 struct sockaddr **rti_info);
97 interface_up(char *name)
102 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
104 if (ioctl(ifsock, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
105 warnmsg(LOG_WARNING, __func__, "ioctl(SIOCGIFFLAGS): %s",
109 if (!(ifr.ifr_flags & IFF_UP)) {
110 ifr.ifr_flags |= IFF_UP;
111 if (ioctl(ifsock, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
112 warnmsg(LOG_ERR, __func__,
113 "ioctl(SIOCSIFFLAGS): %s", strerror(errno));
118 warnmsg(LOG_DEBUG, __func__, "checking if %s is ready...", name);
120 llflag = get_llflag(name);
122 warnmsg(LOG_WARNING, __func__,
123 "get_llflag() failed, anyway I'll try");
127 if (!(llflag & IN6_IFF_NOTREADY)) {
128 warnmsg(LOG_DEBUG, __func__,
129 "%s is ready", name);
132 if (llflag & IN6_IFF_TENTATIVE) {
133 warnmsg(LOG_DEBUG, __func__, "%s is tentative",
135 return IFS_TENTATIVE;
137 if (llflag & IN6_IFF_DUPLICATED)
138 warnmsg(LOG_DEBUG, __func__, "%s is duplicated",
145 interface_status(struct ifinfo *ifinfo)
147 char *ifname = ifinfo->ifname;
149 struct ifmediareq ifmr;
151 /* get interface flags */
152 memset(&ifr, 0, sizeof(ifr));
153 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
154 if (ioctl(ifsock, SIOCGIFFLAGS, &ifr) < 0) {
155 warnmsg(LOG_ERR, __func__, "ioctl(SIOCGIFFLAGS) on %s: %s",
156 ifname, strerror(errno));
160 * if one of UP and RUNNING flags is dropped,
161 * the interface is not active.
163 if ((ifr.ifr_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
167 /* Next, check carrier on the interface, if possible */
168 if (!ifinfo->mediareqok)
170 memset(&ifmr, 0, sizeof(ifmr));
171 strncpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
173 if (ioctl(ifsock, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
174 if (errno != EINVAL) {
175 warnmsg(LOG_DEBUG, __func__,
176 "ioctl(SIOCGIFMEDIA) on %s: %s",
177 ifname, strerror(errno));
181 * EINVAL simply means that the interface does not support
182 * the SIOCGIFMEDIA ioctl. We regard it alive.
184 ifinfo->mediareqok = 0;
188 if (ifmr.ifm_status & IFM_AVALID) {
189 switch(ifmr.ifm_active & IFM_NMASK) {
191 if (ifmr.ifm_status & IFM_ACTIVE)
208 #define ROUNDUP(a, size) \
209 (((a) & ((size)-1)) ? (1 + ((a) | ((size)-1))) : (a))
211 #define NEXT_SA(ap) (ap) = (struct sockaddr *) \
212 ((caddr_t)(ap) + ((ap)->sa_len ? ROUNDUP((ap)->sa_len,\
215 #define ROUNDUP8(a) (1 + (((a) - 1) | 7))
218 lladdropt_length(struct sockaddr_dl *sdl)
220 switch(sdl->sdl_type) {
225 return(ROUNDUP8(ETHER_ADDR_LEN + 2));
232 lladdropt_fill(struct sockaddr_dl *sdl, struct nd_opt_hdr *ndopt)
236 ndopt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; /* fixed */
238 switch(sdl->sdl_type) {
243 ndopt->nd_opt_len = (ROUNDUP8(ETHER_ADDR_LEN + 2)) >> 3;
244 addr = (char *)(ndopt + 1);
245 memcpy(addr, LLADDR(sdl), ETHER_ADDR_LEN);
248 warnmsg(LOG_ERR, __func__,
249 "unsupported link type(%d)", sdl->sdl_type);
257 if_nametosdl(char *name)
259 int mib[6] = {CTL_NET, AF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
260 char *buf, *next, *lim;
262 struct if_msghdr *ifm;
263 struct sockaddr *sa, *rti_info[RTAX_MAX];
264 struct sockaddr_dl *sdl = NULL, *ret_sdl;
266 if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
268 if ((buf = malloc(len)) == NULL)
270 if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
276 for (next = buf; next < lim; next += ifm->ifm_msglen) {
277 ifm = (struct if_msghdr *)next;
278 if (ifm->ifm_type == RTM_IFINFO) {
279 sa = (struct sockaddr *)(ifm + 1);
280 get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
281 if ((sa = rti_info[RTAX_IFP]) != NULL) {
282 if (sa->sa_family == AF_LINK) {
283 sdl = (struct sockaddr_dl *)sa;
284 if (strlen(name) != sdl->sdl_nlen)
285 continue; /* not same len */
286 if (strncmp(&sdl->sdl_data[0],
288 sdl->sdl_nlen) == 0) {
301 if ((ret_sdl = malloc(sdl->sdl_len)) == NULL)
303 memcpy((caddr_t)ret_sdl, (caddr_t)sdl, sdl->sdl_len);
310 getinet6sysctl(int code)
312 int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
317 size = sizeof(value);
318 if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size, NULL, 0) < 0)
324 /*------------------------------------------------------------*/
326 /* get ia6_flags for link-local addr on if. returns -1 on error. */
328 get_llflag(const char *name)
330 #ifdef HAVE_GETIFADDRS
331 struct ifaddrs *ifap, *ifa;
332 struct in6_ifreq ifr6;
333 struct sockaddr_in6 *sin6;
336 if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
337 warnmsg(LOG_ERR, __func__, "socket(SOCK_DGRAM): %s",
341 if (getifaddrs(&ifap) != 0) {
342 warnmsg(LOG_ERR, __func__, "etifaddrs: %s",
347 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
348 if (strlen(ifa->ifa_name) != strlen(name)
349 || strncmp(ifa->ifa_name, name, strlen(name)) != 0)
351 if (ifa->ifa_addr->sa_family != AF_INET6)
353 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
354 if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
357 memset(&ifr6, 0, sizeof(ifr6));
358 strcpy(ifr6.ifr_name, name);
359 memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
360 if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
361 warnmsg(LOG_ERR, __func__,
362 "ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
368 return ifr6.ifr_ifru.ifru_flags6;
377 struct ifreq *iflist;
378 struct ifconf ifconf;
379 struct ifreq *ifr, *ifr_end;
380 struct sockaddr_in6 *sin6;
381 struct in6_ifreq ifr6;
383 maxif = if_maxindex() + 1;
384 iflist = (struct ifreq *)malloc(maxif * BUFSIZ); /* XXX */
385 if (iflist == NULL) {
386 warnmsg(LOG_ERR, __func__, "not enough core");
390 if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
391 warnmsg(LOG_ERR, __func__, "socket(SOCK_DGRAM): %s",
395 memset(&ifconf, 0, sizeof(ifconf));
396 ifconf.ifc_req = iflist;
397 ifconf.ifc_len = maxif * BUFSIZ; /* XXX */
398 if (ioctl(s, SIOCGIFCONF, &ifconf) < 0) {
399 warnmsg(LOG_ERR, __func__, "ioctl(SIOCGIFCONF): %s",
404 /* Look for this interface in the list */
405 ifr_end = (struct ifreq *) (ifconf.ifc_buf + ifconf.ifc_len);
406 for (ifr = ifconf.ifc_req;
408 ifr = (struct ifreq *) ((char *) &ifr->ifr_addr
409 + ifr->ifr_addr.sa_len)) {
410 if (strlen(ifr->ifr_name) != strlen(name)
411 || strncmp(ifr->ifr_name, name, strlen(name)) != 0)
413 if (ifr->ifr_addr.sa_family != AF_INET6)
415 sin6 = (struct sockaddr_in6 *)&ifr->ifr_addr;
416 if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
419 memset(&ifr6, 0, sizeof(ifr6));
420 strcpy(ifr6.ifr_name, name);
421 memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
422 if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
423 warnmsg(LOG_ERR, __func__,
424 "ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
430 return ifr6.ifr_ifru.ifru_flags6;
439 #ifndef HAVE_GETIFADDRS
443 struct if_nameindex *p, *p0;
444 unsigned int max = 0;
447 for (p = p0; p && p->if_index && p->if_name; p++) {
448 if (max < p->if_index)
451 if_freenameindex(p0);
457 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
461 for (i = 0; i < RTAX_MAX; i++) {
462 if (addrs & (1 << i)) {