[apple/network_cmds.git] / rtsol.tproj / if.c

/*	$KAME: if.c,v 1.15 2001/05/22 06:04:17 jinmei Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/usr.sbin/rtsold/if.c,v 1.2.2.3 2001/07/03 11:02:16 ume Exp $
 */

#include <sys/param.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/ioctl.h>
#include <sys/queue.h>

#include <net/if.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
#include <net/if_var.h>
#endif /* __FreeBSD__ >= 3 */
#include <net/if_types.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#if defined ( __FreeBSD__) || defined (__APPLE__)
# include <net/ethernet.h>
#endif
#ifdef __NetBSD__
#include <net/if_ether.h>
#endif
#if defined(__bsdi__) || defined(__OpenBSD__)
# include <netinet/in.h>
# include <netinet/if_ether.h>
#endif
#include <netinet/in.h>
#include <netinet/icmp6.h>

#include <netinet6/in6_var.h>

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <syslog.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#ifdef HAVE_GETIFADDRS
#include <ifaddrs.h>
#endif

#include "rtsold.h"

extern int rssock;
static int ifsock;

static int get_llflag __P((const char *name));
#ifndef HAVE_GETIFADDRS
static unsigned int if_maxindex __P((void));
#endif
static void get_rtaddrs __P((int addrs, struct sockaddr *sa,
			     struct sockaddr **rti_info));

int
ifinit()
{
	ifsock = rssock;

	return(0);
}

int
interface_up(char *name)
{
	struct ifreq ifr;
	int llflag;

	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));

	if (ioctl(ifsock, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
		warnmsg(LOG_WARNING, __FUNCTION__, "ioctl(SIOCGIFFLAGS): %s",
		       strerror(errno));
		return(-1);
	}
	if (!(ifr.ifr_flags & IFF_UP)) {
		ifr.ifr_flags |= IFF_UP;
		if (ioctl(ifsock, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
			warnmsg(LOG_ERR, __FUNCTION__,
				"ioctl(SIOCSIFFLAGS): %s", strerror(errno));
		}
		return(-1);
	}

	warnmsg(LOG_DEBUG, __FUNCTION__, "checking if %s is ready...", name);

	llflag = get_llflag(name);
	if (llflag < 0) {
		warnmsg(LOG_WARNING, __FUNCTION__,
			"get_llflag() failed, anyway I'll try");
		return 0;
	}

	if (!(llflag & IN6_IFF_NOTREADY)) {
		warnmsg(LOG_DEBUG, __FUNCTION__,
			"%s is ready", name);
		return(0);
	} else {
		if (llflag & IN6_IFF_TENTATIVE) {
			warnmsg(LOG_DEBUG, __FUNCTION__, "%s is tentative",
			       name);
			return IFS_TENTATIVE;
		}
		if (llflag & IN6_IFF_DUPLICATED)
			warnmsg(LOG_DEBUG, __FUNCTION__, "%s is duplicated",
			       name);
		return -1;
	}
}

int
interface_status(struct ifinfo *ifinfo)
{
	char *ifname = ifinfo->ifname;
	struct ifreq ifr;
	struct ifmediareq ifmr;
	
	/* get interface flags */
	memset(&ifr, 0, sizeof(ifr));
	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
	if (ioctl(ifsock, SIOCGIFFLAGS, &ifr) < 0) {
		warnmsg(LOG_ERR, __FUNCTION__, "ioctl(SIOCGIFFLAGS) on %s: %s",
		       ifname, strerror(errno));
		return(-1);
	}
	/*
	 * if one of UP and RUNNING flags is dropped,
	 * the interface is not active.
	 */
	if ((ifr.ifr_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
		goto inactive;
	}

	/* Next, check carrier on the interface, if possible */
	if (!ifinfo->mediareqok)
		goto active;
	memset(&ifmr, 0, sizeof(ifmr));
	strncpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));

	if (ioctl(ifsock, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
		if (errno != EINVAL) {
			warnmsg(LOG_DEBUG, __FUNCTION__,
				"ioctl(SIOCGIFMEDIA) on %s: %s",
			       ifname, strerror(errno));
			return(-1);
		}
		/*
		 * EINVAL simply means that the interface does not support
		 * the SIOCGIFMEDIA ioctl. We regard it alive.
		 */
		ifinfo->mediareqok = 0;
		goto active;
	}

	if (ifmr.ifm_status & IFM_AVALID) {
		switch(ifmr.ifm_active & IFM_NMASK) {
		 case IFM_ETHER:
			 if (ifmr.ifm_status & IFM_ACTIVE)
				 goto active;
			 else
				 goto inactive;
			 break;
		 default:
			 goto inactive;
		}
	}

  inactive:
	return(0);

  active:
	return(1);
}

#define ROUNDUP(a, size) \
	(((a) & ((size)-1)) ? (1 + ((a) | ((size)-1))) : (a))

#define NEXT_SA(ap) (ap) = (struct sockaddr *) \
	((caddr_t)(ap) + ((ap)->sa_len ? ROUNDUP((ap)->sa_len,\
						 sizeof(u_long)) :\
			  			 sizeof(u_long)))
#define ROUNDUP8(a) (1 + (((a) - 1) | 7))

int
lladdropt_length(struct sockaddr_dl *sdl)
{
	switch(sdl->sdl_type) {
	 case IFT_ETHER:
#ifdef IFT_IEEE80211
	case IFT_IEEE80211:
#endif
		 return(ROUNDUP8(ETHER_ADDR_LEN + 2));
	 default:
		 return(0);
	}
}

void
lladdropt_fill(struct sockaddr_dl *sdl, struct nd_opt_hdr *ndopt)
{
	char *addr;

	ndopt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; /* fixed */

	switch(sdl->sdl_type) {
	 case IFT_ETHER:
#ifdef IFT_IEEE80211
	case IFT_IEEE80211:
#endif
		 ndopt->nd_opt_len = (ROUNDUP8(ETHER_ADDR_LEN + 2)) >> 3;
		 addr = (char *)(ndopt + 1);
		 memcpy(addr, LLADDR(sdl), ETHER_ADDR_LEN);
		 break;
	 default:
		 warnmsg(LOG_ERR, __FUNCTION__,
			 "unsupported link type(%d)", sdl->sdl_type);
		 exit(1);
	}

	return;
}

struct sockaddr_dl *
if_nametosdl(char *name)
{
	int mib[6] = {CTL_NET, AF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
	char *buf, *next, *lim;
	size_t len;
	struct if_msghdr *ifm;
	struct sockaddr *sa, *rti_info[RTAX_MAX];
	struct sockaddr_dl *sdl = NULL, *ret_sdl;

	if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
		return(NULL);
	if ((buf = malloc(len)) == NULL)
		return(NULL);
	if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
		free(buf);
		return(NULL);
	}

	lim = buf + len;
	for (next = buf; next < lim; next += ifm->ifm_msglen) {
		ifm = (struct if_msghdr *)next;
		if (ifm->ifm_type == RTM_IFINFO) {
			sa = (struct sockaddr *)(ifm + 1);
			get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
			if ((sa = rti_info[RTAX_IFP]) != NULL) {
				if (sa->sa_family == AF_LINK) {
					sdl = (struct sockaddr_dl *)sa;
					if (strlen(name) != sdl->sdl_nlen)
						continue; /* not same len */
					if (strncmp(&sdl->sdl_data[0],
						    name,
						    sdl->sdl_nlen) == 0) {
						break;
					}
				}
			}
		}
	}
	if (next == lim) {
		/* search failed */
		free(buf);
		return(NULL);
	}

	if ((ret_sdl = malloc(sdl->sdl_len)) == NULL)
		return(NULL);
	memcpy((caddr_t)ret_sdl, (caddr_t)sdl, sdl->sdl_len);

	free(buf);
	return(ret_sdl);
}

int
getinet6sysctl(int code)
{
	int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
	int value;
	size_t size;

	mib[3] = code;
	size = sizeof(value);
	if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size, NULL, 0) < 0)
		return -1;
	else
		return value;
}

/*------------------------------------------------------------*/

/* get ia6_flags for link-local addr on if.  returns -1 on error. */
static int
get_llflag(const char *name)
{
#ifdef HAVE_GETIFADDRS
	struct ifaddrs *ifap, *ifa;
	struct in6_ifreq ifr6;
	struct sockaddr_in6 *sin6;
	int s;

	if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
		warnmsg(LOG_ERR, __FUNCTION__, "socket(SOCK_DGRAM): %s",
		    strerror(errno));
		exit(1);
	}
	if (getifaddrs(&ifap) != 0) {
		warnmsg(LOG_ERR, __FUNCTION__, "etifaddrs: %s",
		    strerror(errno));
		exit(1);
	}

	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
		if (strlen(ifa->ifa_name) != strlen(name)
		 || strncmp(ifa->ifa_name, name, strlen(name)) != 0)
			continue;
		if (ifa->ifa_addr->sa_family != AF_INET6)
			continue;
		sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
		if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
			continue;

		memset(&ifr6, 0, sizeof(ifr6));
		strcpy(ifr6.ifr_name, name);
		memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
		if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
			warnmsg(LOG_ERR, __FUNCTION__,
			    "ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
			exit(1);
		}

		freeifaddrs(ifap);
		close(s);
		return ifr6.ifr_ifru.ifru_flags6;
	}

	freeifaddrs(ifap);
	close(s);
	return -1;
#else
	int s;
	unsigned int maxif;
	struct ifreq *iflist;
	struct ifconf ifconf;
	struct ifreq *ifr, *ifr_end;
	struct sockaddr_in6 *sin6;
	struct in6_ifreq ifr6;

	maxif = if_maxindex() + 1;
	iflist = (struct ifreq *)malloc(maxif * BUFSIZ);	/* XXX */
	if (iflist == NULL) {
		warnmsg(LOG_ERR, __FUNCTION__, "not enough core");
		exit(1);
	}

	if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
		warnmsg(LOG_ERR, __FUNCTION__, "socket(SOCK_DGRAM): %s",
		    strerror(errno));
		exit(1);
	}
	memset(&ifconf, 0, sizeof(ifconf));
	ifconf.ifc_req = iflist;
	ifconf.ifc_len = maxif * BUFSIZ;	/* XXX */
	if (ioctl(s, SIOCGIFCONF, &ifconf) < 0) {
		warnmsg(LOG_ERR, __FUNCTION__, "ioctl(SIOCGIFCONF): %s",
		    strerror(errno));
		exit(1);
	}

	/* Look for this interface in the list */
	ifr_end = (struct ifreq *) (ifconf.ifc_buf + ifconf.ifc_len);
	for (ifr = ifconf.ifc_req;
	     ifr < ifr_end;
	     ifr = (struct ifreq *) ((char *) &ifr->ifr_addr
				    + ifr->ifr_addr.sa_len)) {
		if (strlen(ifr->ifr_name) != strlen(name)
		 || strncmp(ifr->ifr_name, name, strlen(name)) != 0)
			continue;
		if (ifr->ifr_addr.sa_family != AF_INET6)
			continue;
		sin6 = (struct sockaddr_in6 *)&ifr->ifr_addr;
		if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
			continue;

		memset(&ifr6, 0, sizeof(ifr6));
		strcpy(ifr6.ifr_name, name);
		memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
		if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
			warnmsg(LOG_ERR, __FUNCTION__,
			    "ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
			exit(1);
		}

		free(iflist);
		close(s);
		return ifr6.ifr_ifru.ifru_flags6;
	}

	free(iflist);
	close(s);
	return -1;
#endif
}

#ifndef HAVE_GETIFADDRS
static unsigned int
if_maxindex()
{
	struct if_nameindex *p, *p0;
	unsigned int max = 0;

	p0 = if_nameindex();
	for (p = p0; p && p->if_index && p->if_name; p++) {
		if (max < p->if_index)
			max = p->if_index;
	}
	if_freenameindex(p0);
	return max;
}
#endif

static void
get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
{
	int i;
	
	for (i = 0; i < RTAX_MAX; i++) {
		if (addrs & (1 << i)) {
			rti_info[i] = sa;
			NEXT_SA(sa);
		}
		else
			rti_info[i] = NULL;
	}
}
Commit	Line	Data
7ba0088d A	1	/* $KAME: if.c,v 1.15 2001/05/22 06:04:17 jinmei Exp $ */
	2
	3	/*
	4	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	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.
	18	*
	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
	29	* SUCH DAMAGE.
	30	*
	31	* $FreeBSD: src/usr.sbin/rtsold/if.c,v 1.2.2.3 2001/07/03 11:02:16 ume Exp $
	32	*/
	33
	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>
	39
	40	#include <net/if.h>
	41	#if defined(__FreeBSD__) && __FreeBSD__ >= 3 \|\| defined (__APPLE__)
	42	#include <net/if_var.h>
	43	#endif /* __FreeBSD__ >= 3 */
	44	#include <net/if_types.h>
	45	#include <net/route.h>
	46	#include <net/if_dl.h>
	47	#include <net/if_media.h>
	48	#if defined ( __FreeBSD__) \|\| defined (__APPLE__)
	49	# include <net/ethernet.h>
	50	#endif
	51	#ifdef __NetBSD__
	52	#include <net/if_ether.h>
	53	#endif
	54	#if defined(__bsdi__) \|\| defined(__OpenBSD__)
	55	# include <netinet/in.h>
	56	# include <netinet/if_ether.h>
	57	#endif
	58	#include <netinet/in.h>
	59	#include <netinet/icmp6.h>
	60
	61	#include <netinet6/in6_var.h>
	62
	63	#include <stdio.h>
	64	#include <unistd.h>
65	#include <stdlib.h>
66	#include <syslog.h>
67	#include <string.h>
68	#include <fcntl.h>
69	#include <errno.h>
70	#include <limits.h>
71	#ifdef HAVE_GETIFADDRS
72	#include <ifaddrs.h>
73	#endif
74
75	#include "rtsold.h"
76
77	extern int rssock;
78	static int ifsock;
79
80	static int get_llflag __P((const char *name));
81	#ifndef HAVE_GETIFADDRS
82	static unsigned int if_maxindex __P((void));
83	#endif
84	static void get_rtaddrs __P((int addrs, struct sockaddr *sa,
85	struct sockaddr **rti_info));
86
87	int
88	ifinit()
89	{
90	ifsock = rssock;
91
92	return(0);
93	}
94
95	int
96	interface_up(char *name)
97	{
98	struct ifreq ifr;
99	int llflag;
100
101	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
102
103	if (ioctl(ifsock, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
104	warnmsg(LOG_WARNING, __FUNCTION__, "ioctl(SIOCGIFFLAGS): %s",
105	strerror(errno));
106	return(-1);
107	}
108	if (!(ifr.ifr_flags & IFF_UP)) {
109	ifr.ifr_flags \|= IFF_UP;
110	if (ioctl(ifsock, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
111	warnmsg(LOG_ERR, __FUNCTION__,
112	"ioctl(SIOCSIFFLAGS): %s", strerror(errno));
113	}
114	return(-1);
115	}
116
117	warnmsg(LOG_DEBUG, __FUNCTION__, "checking if %s is ready...", name);
118
119	llflag = get_llflag(name);
120	if (llflag < 0) {
121	warnmsg(LOG_WARNING, __FUNCTION__,
122	"get_llflag() failed, anyway I'll try");
123	return 0;
124	}
125
126	if (!(llflag & IN6_IFF_NOTREADY)) {
127	warnmsg(LOG_DEBUG, __FUNCTION__,
128	"%s is ready", name);
129	return(0);
130	} else {
131	if (llflag & IN6_IFF_TENTATIVE) {
132	warnmsg(LOG_DEBUG, __FUNCTION__, "%s is tentative",
133	name);
134	return IFS_TENTATIVE;
135	}
136	if (llflag & IN6_IFF_DUPLICATED)
137	warnmsg(LOG_DEBUG, __FUNCTION__, "%s is duplicated",
138	name);
139	return -1;
140	}
141	}
142
143	int
144	interface_status(struct ifinfo *ifinfo)
145	{
146	char *ifname = ifinfo->ifname;
147	struct ifreq ifr;
148	struct ifmediareq ifmr;
149
150	/* get interface flags */
151	memset(&ifr, 0, sizeof(ifr));
152	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
153	if (ioctl(ifsock, SIOCGIFFLAGS, &ifr) < 0) {
154	warnmsg(LOG_ERR, __FUNCTION__, "ioctl(SIOCGIFFLAGS) on %s: %s",
155	ifname, strerror(errno));
156	return(-1);
157	}
158	/*
159	* if one of UP and RUNNING flags is dropped,
160	* the interface is not active.
161	*/
162	if ((ifr.ifr_flags & (IFF_UP\|IFF_RUNNING)) != (IFF_UP\|IFF_RUNNING)) {
163	goto inactive;
164	}
165
166	/* Next, check carrier on the interface, if possible */
167	if (!ifinfo->mediareqok)
168	goto active;
169	memset(&ifmr, 0, sizeof(ifmr));
170	strncpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
171
172	if (ioctl(ifsock, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
173	if (errno != EINVAL) {
174	warnmsg(LOG_DEBUG, __FUNCTION__,
175	"ioctl(SIOCGIFMEDIA) on %s: %s",
176	ifname, strerror(errno));
177	return(-1);
178	}
179	/*
180	* EINVAL simply means that the interface does not support
181	* the SIOCGIFMEDIA ioctl. We regard it alive.
182	*/
183	ifinfo->mediareqok = 0;
184	goto active;
185	}
186
187	if (ifmr.ifm_status & IFM_AVALID) {
188	switch(ifmr.ifm_active & IFM_NMASK) {
189	case IFM_ETHER:
190	if (ifmr.ifm_status & IFM_ACTIVE)
191	goto active;
192	else
193	goto inactive;
194	break;
195	default:
196	goto inactive;
197	}
198	}
199
200	inactive:
201	return(0);
202
203	active:
204	return(1);
205	}
206
207	#define ROUNDUP(a, size) \
208	(((a) & ((size)-1)) ? (1 + ((a) \| ((size)-1))) : (a))
209
210	#define NEXT_SA(ap) (ap) = (struct sockaddr *) \
211	((caddr_t)(ap) + ((ap)->sa_len ? ROUNDUP((ap)->sa_len,\
212	sizeof(u_long)) :\
213	sizeof(u_long)))
214	#define ROUNDUP8(a) (1 + (((a) - 1) \| 7))
215
216	int
217	lladdropt_length(struct sockaddr_dl *sdl)
218	{
219	switch(sdl->sdl_type) {
220	case IFT_ETHER:
221	#ifdef IFT_IEEE80211
222	case IFT_IEEE80211:
223	#endif
224	return(ROUNDUP8(ETHER_ADDR_LEN + 2));
225	default:
226	return(0);
227	}
228	}
229
230	void
231	lladdropt_fill(struct sockaddr_dl sdl, struct nd_opt_hdr ndopt)
232	{
233	char *addr;
234
235	ndopt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; /* fixed */
236
237	switch(sdl->sdl_type) {
238	case IFT_ETHER:
239	#ifdef IFT_IEEE80211
240	case IFT_IEEE80211:
241	#endif
242	ndopt->nd_opt_len = (ROUNDUP8(ETHER_ADDR_LEN + 2)) >> 3;
243	addr = (char *)(ndopt + 1);
244	memcpy(addr, LLADDR(sdl), ETHER_ADDR_LEN);
245	break;
246	default:
247	warnmsg(LOG_ERR, __FUNCTION__,
248	"unsupported link type(%d)", sdl->sdl_type);
249	exit(1);
250	}
251
252	return;
253	}
254
255	struct sockaddr_dl *
256	if_nametosdl(char *name)
257	{
258	int mib[6] = {CTL_NET, AF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
259	char buf, next, *lim;
260	size_t len;
261	struct if_msghdr *ifm;
262	struct sockaddr sa, rti_info[RTAX_MAX];
263	struct sockaddr_dl sdl = NULL, ret_sdl;
264
265	if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
266	return(NULL);
267	if ((buf = malloc(len)) == NULL)
268	return(NULL);
269	if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
270	free(buf);
271	return(NULL);
272	}
273
274	lim = buf + len;
275	for (next = buf; next < lim; next += ifm->ifm_msglen) {
276	ifm = (struct if_msghdr *)next;
277	if (ifm->ifm_type == RTM_IFINFO) {
278	sa = (struct sockaddr *)(ifm + 1);
279	get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
280	if ((sa = rti_info[RTAX_IFP]) != NULL) {
281	if (sa->sa_family == AF_LINK) {
282	sdl = (struct sockaddr_dl *)sa;
283	if (strlen(name) != sdl->sdl_nlen)
284	continue; /* not same len */
285	if (strncmp(&sdl->sdl_data[0],
286	name,
287	sdl->sdl_nlen) == 0) {
288	break;
289	}
290	}
291	}
292	}
293	}
294	if (next == lim) {
295	/* search failed */
296	free(buf);
297	return(NULL);
298	}
299
300	if ((ret_sdl = malloc(sdl->sdl_len)) == NULL)
301	return(NULL);
302	memcpy((caddr_t)ret_sdl, (caddr_t)sdl, sdl->sdl_len);
303
304	free(buf);
305	return(ret_sdl);
306	}
307
308	int
309	getinet6sysctl(int code)
310	{
311	int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
312	int value;
313	size_t size;
314
315	mib[3] = code;
316	size = sizeof(value);
317	if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size, NULL, 0) < 0)
318	return -1;
319	else
320	return value;
321	}
322
323	/------------------------------------------------------------/
324
325	/* get ia6_flags for link-local addr on if. returns -1 on error. */
326	static int
327	get_llflag(const char *name)
328	{
329	#ifdef HAVE_GETIFADDRS
330	struct ifaddrs ifap, ifa;
331	struct in6_ifreq ifr6;
332	struct sockaddr_in6 *sin6;
333	int s;
334
335	if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
336	warnmsg(LOG_ERR, __FUNCTION__, "socket(SOCK_DGRAM): %s",
337	strerror(errno));
338	exit(1);
339	}
340	if (getifaddrs(&ifap) != 0) {
341	warnmsg(LOG_ERR, __FUNCTION__, "etifaddrs: %s",
342	strerror(errno));
343	exit(1);
344	}
345
346	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
347	if (strlen(ifa->ifa_name) != strlen(name)
348	\|\| strncmp(ifa->ifa_name, name, strlen(name)) != 0)
349	continue;
350	if (ifa->ifa_addr->sa_family != AF_INET6)
351	continue;
352	sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
353	if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
354	continue;
355
356	memset(&ifr6, 0, sizeof(ifr6));
357	strcpy(ifr6.ifr_name, name);
358	memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
359	if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
360	warnmsg(LOG_ERR, __FUNCTION__,
361	"ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
362	exit(1);
363	}
364
365	freeifaddrs(ifap);
366	close(s);
367	return ifr6.ifr_ifru.ifru_flags6;
368	}
369
370	freeifaddrs(ifap);
371	close(s);
372	return -1;
373	#else
374	int s;
375	unsigned int maxif;
376	struct ifreq *iflist;
377	struct ifconf ifconf;
378	struct ifreq ifr, ifr_end;
379	struct sockaddr_in6 *sin6;
380	struct in6_ifreq ifr6;
381
382	maxif = if_maxindex() + 1;
383	iflist = (struct ifreq )malloc(maxif BUFSIZ); /* XXX */
384	if (iflist == NULL) {
385	warnmsg(LOG_ERR, __FUNCTION__, "not enough core");
386	exit(1);
387	}
388
389	if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
390	warnmsg(LOG_ERR, __FUNCTION__, "socket(SOCK_DGRAM): %s",
391	strerror(errno));
392	exit(1);
393	}
394	memset(&ifconf, 0, sizeof(ifconf));
395	ifconf.ifc_req = iflist;
396	ifconf.ifc_len = maxif * BUFSIZ; /* XXX */
397	if (ioctl(s, SIOCGIFCONF, &ifconf) < 0) {
398	warnmsg(LOG_ERR, __FUNCTION__, "ioctl(SIOCGIFCONF): %s",
399	strerror(errno));
400	exit(1);
401	}
402
403	/* Look for this interface in the list */
404	ifr_end = (struct ifreq *) (ifconf.ifc_buf + ifconf.ifc_len);
405	for (ifr = ifconf.ifc_req;
406	ifr < ifr_end;
407	ifr = (struct ifreq ) ((char ) &ifr->ifr_addr
408	+ ifr->ifr_addr.sa_len)) {
409	if (strlen(ifr->ifr_name) != strlen(name)
410	\|\| strncmp(ifr->ifr_name, name, strlen(name)) != 0)
411	continue;
412	if (ifr->ifr_addr.sa_family != AF_INET6)
413	continue;
414	sin6 = (struct sockaddr_in6 *)&ifr->ifr_addr;
415	if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
416	continue;
417
418	memset(&ifr6, 0, sizeof(ifr6));
419	strcpy(ifr6.ifr_name, name);
420	memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
421	if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
422	warnmsg(LOG_ERR, __FUNCTION__,
423	"ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
424	exit(1);
425	}
426
427	free(iflist);
428	close(s);
429	return ifr6.ifr_ifru.ifru_flags6;
430	}
431
432	free(iflist);
433	close(s);
434	return -1;
435	#endif
436	}
437
438	#ifndef HAVE_GETIFADDRS
439	static unsigned int
440	if_maxindex()
441	{
442	struct if_nameindex p, p0;
443	unsigned int max = 0;
444
445	p0 = if_nameindex();
446	for (p = p0; p && p->if_index && p->if_name; p++) {
447	if (max < p->if_index)
448	max = p->if_index;
449	}
450	if_freenameindex(p0);
451	return max;
452	}
453	#endif
454
455	static void
456	get_rtaddrs(int addrs, struct sockaddr sa, struct sockaddr *rti_info)
457	{
458	int i;
459
460	for (i = 0; i < RTAX_MAX; i++) {
461	if (addrs & (1 << i)) {
462	rti_info[i] = sa;
463	NEXT_SA(sa);
464	}
465	else
466	rti_info[i] = NULL;
467	}
468	}