1 /* $KAME: if.c,v 1.27 2003/10/05 00:09:36 itojun 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
34 #include <sys/param.h>
35 #include <sys/socket.h>
36 #include <sys/sysctl.h>
37 #include <sys/ioctl.h>
38 #include <sys/queue.h>
41 #include <net/if_var.h>
42 #include <net/if_types.h>
43 #include <net/route.h>
44 #include <net/if_dl.h>
45 #include <net/if_media.h>
46 #include <net/ethernet.h>
47 #include <netinet/in.h>
48 #include <netinet/icmp6.h>
50 #include <netinet6/in6_var.h>
66 static int get_llflag(const char *);
67 static void get_rtaddrs(int, struct sockaddr *, struct sockaddr **);
78 interface_up(char *name)
83 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
85 if (ioctl(ifsock, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
86 warnmsg(LOG_WARNING, __func__, "ioctl(SIOCGIFFLAGS): %s",
90 if (!(ifr.ifr_flags & IFF_UP)) {
91 ifr.ifr_flags |= IFF_UP;
92 if (ioctl(ifsock, SIOCSIFFLAGS, (caddr_t)&ifr) < 0)
93 warnmsg(LOG_ERR, __func__,
94 "ioctl(SIOCSIFFLAGS): %s", strerror(errno));
98 warnmsg(LOG_DEBUG, __func__, "checking if %s is ready...", name);
100 llflag = get_llflag(name);
102 warnmsg(LOG_WARNING, __func__,
103 "get_llflag() failed, anyway I'll try");
107 if (!(llflag & IN6_IFF_NOTREADY)) {
108 warnmsg(LOG_DEBUG, __func__, "%s is ready", name);
111 if (llflag & IN6_IFF_TENTATIVE) {
112 warnmsg(LOG_DEBUG, __func__, "%s is tentative",
114 return IFS_TENTATIVE;
116 if (llflag & IN6_IFF_DUPLICATED)
117 warnmsg(LOG_DEBUG, __func__, "%s is duplicated",
124 interface_status(struct ifinfo *ifinfo)
126 char *ifname = ifinfo->ifname;
128 struct ifmediareq ifmr;
130 /* get interface flags */
131 memset(&ifr, 0, sizeof(ifr));
132 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
133 if (ioctl(ifsock, SIOCGIFFLAGS, &ifr) < 0) {
134 warnmsg(LOG_ERR, __func__, "ioctl(SIOCGIFFLAGS) on %s: %s",
135 ifname, strerror(errno));
139 * if one of UP and RUNNING flags is dropped,
140 * the interface is not active.
142 if ((ifr.ifr_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
146 /* Next, check carrier on the interface, if possible */
147 if (!ifinfo->mediareqok)
149 memset(&ifmr, 0, sizeof(ifmr));
150 strncpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
152 if (ioctl(ifsock, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
153 if (errno != EINVAL) {
154 warnmsg(LOG_DEBUG, __func__,
155 "ioctl(SIOCGIFMEDIA) on %s: %s",
156 ifname, strerror(errno));
160 * EINVAL simply means that the interface does not support
161 * the SIOCGIFMEDIA ioctl. We regard it alive.
163 ifinfo->mediareqok = 0;
167 if (ifmr.ifm_status & IFM_AVALID) {
168 switch (ifmr.ifm_active & IFM_NMASK) {
171 if (ifmr.ifm_status & IFM_ACTIVE)
188 #define ROUNDUP(a, size) \
189 (((a) & ((size)-1)) ? (1 + ((a) | ((size)-1))) : (a))
191 #define NEXT_SA(ap) (ap) = (struct sockaddr *) \
192 ((caddr_t)(ap) + ((ap)->sa_len ? ROUNDUP((ap)->sa_len,\
193 sizeof(u_long)) : sizeof(u_long)))
194 #define ROUNDUP8(a) (1 + (((a) - 1) | 7))
197 lladdropt_length(struct sockaddr_dl *sdl)
199 switch (sdl->sdl_type) {
204 return(ROUNDUP8(ETHER_ADDR_LEN + 2));
211 lladdropt_fill(struct sockaddr_dl *sdl, struct nd_opt_hdr *ndopt)
215 ndopt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; /* fixed */
217 switch (sdl->sdl_type) {
222 ndopt->nd_opt_len = (ROUNDUP8(ETHER_ADDR_LEN + 2)) >> 3;
223 addr = (char *)(ndopt + 1);
224 memcpy(addr, LLADDR(sdl), ETHER_ADDR_LEN);
227 warnmsg(LOG_ERR, __func__,
228 "unsupported link type(%d)", sdl->sdl_type);
236 if_nametosdl(char *name)
238 int mib[6] = {CTL_NET, AF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
239 char *buf, *next, *lim;
241 struct if_msghdr *ifm;
242 struct sockaddr *sa, *rti_info[RTAX_MAX];
243 struct sockaddr_dl *sdl = NULL, *ret_sdl;
245 if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
247 if ((buf = malloc(len)) == NULL)
249 if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
255 for (next = buf; next < lim; next += ifm->ifm_msglen) {
256 ifm = (struct if_msghdr *)next;
257 if (ifm->ifm_type == RTM_IFINFO) {
258 sa = (struct sockaddr *)(ifm + 1);
259 get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
260 if ((sa = rti_info[RTAX_IFP]) != NULL) {
261 if (sa->sa_family == AF_LINK) {
262 sdl = (struct sockaddr_dl *)sa;
263 if (strlen(name) != sdl->sdl_nlen)
264 continue; /* not same len */
265 if (strncmp(&sdl->sdl_data[0],
267 sdl->sdl_nlen) == 0) {
280 if ((ret_sdl = malloc(sdl->sdl_len)) == NULL) {
284 memcpy((caddr_t)ret_sdl, (caddr_t)sdl, sdl->sdl_len);
291 getinet6sysctl(int code)
293 int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
298 size = sizeof(value);
299 if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size, NULL, 0) < 0)
306 setinet6sysctl(int code, int newval)
308 int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
313 size = sizeof(value);
314 if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size,
315 &newval, sizeof(newval)) < 0)
321 /*------------------------------------------------------------*/
323 /* get ia6_flags for link-local addr on if. returns -1 on error. */
325 get_llflag(const char *name)
327 struct ifaddrs *ifap, *ifa;
328 struct in6_ifreq ifr6;
329 struct sockaddr_in6 *sin6;
332 if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
333 warnmsg(LOG_ERR, __func__, "socket(SOCK_DGRAM): %s",
337 if (getifaddrs(&ifap) != 0) {
338 warnmsg(LOG_ERR, __func__, "getifaddrs: %s",
343 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
344 if (strlen(ifa->ifa_name) != strlen(name) ||
345 strncmp(ifa->ifa_name, name, strlen(name)) != 0)
347 if (ifa->ifa_addr->sa_family != AF_INET6)
349 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
350 if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
353 memset(&ifr6, 0, sizeof(ifr6));
354 strncpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name));
355 memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
356 if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
357 warnmsg(LOG_ERR, __func__,
358 "ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
364 return ifr6.ifr_ifru.ifru_flags6;
374 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
378 for (i = 0; i < RTAX_MAX; i++) {
379 if (addrs & (1 << i)) {