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

/*
 * Copyright (c) 2009 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

/*	$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(uint32_t)) :\
			  			 sizeof(uint32_t)))
#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));
		strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_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));
		strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_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
fdfd5971 A	1	/*
	2	* Copyright (c) 2009 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
7ba0088d A	29	/* $KAME: if.c,v 1.15 2001/05/22 06:04:17 jinmei Exp $ */
	30
	31	/*
	32	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	33	* All rights reserved.
	34	*
	35	* Redistribution and use in source and binary forms, with or without
	36	* modification, are permitted provided that the following conditions
	37	* are met:
	38	* 1. Redistributions of source code must retain the above copyright
	39	* notice, this list of conditions and the following disclaimer.
	40	* 2. Redistributions in binary form must reproduce the above copyright
	41	* notice, this list of conditions and the following disclaimer in the
	42	* documentation and/or other materials provided with the distribution.
	43	* 3. Neither the name of the project nor the names of its contributors
	44	* may be used to endorse or promote products derived from this software
	45	* without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	48	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	50	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	51	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	52	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	53	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	54	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	55	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	56	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	57	* SUCH DAMAGE.
	58	*
	59	* $FreeBSD: src/usr.sbin/rtsold/if.c,v 1.2.2.3 2001/07/03 11:02:16 ume Exp $
	60	*/
	61
	62	#include <sys/param.h>
	63	#include <sys/socket.h>
	64	#include <sys/sysctl.h>
	65	#include <sys/ioctl.h>
	66	#include <sys/queue.h>
	67
	68	#include <net/if.h>
	69	#if defined(__FreeBSD__) && __FreeBSD__ >= 3 \|\| defined (__APPLE__)
	70	#include <net/if_var.h>
	71	#endif /* __FreeBSD__ >= 3 */
	72	#include <net/if_types.h>
	73	#include <net/route.h>
	74	#include <net/if_dl.h>
	75	#include <net/if_media.h>
	76	#if defined ( __FreeBSD__) \|\| defined (__APPLE__)
	77	# include <net/ethernet.h>
	78	#endif
	79	#ifdef __NetBSD__
	80	#include <net/if_ether.h>
	81	#endif
	82	#if defined(__bsdi__) \|\| defined(__OpenBSD__)
	83	# include <netinet/in.h>
	84	# include <netinet/if_ether.h>
	85	#endif
	86	#include <netinet/in.h>
	87	#include <netinet/icmp6.h>
	88
	89	#include <netinet6/in6_var.h>
	90
	91	#include <stdio.h>
	92	#include <unistd.h>
93	#include <stdlib.h>
94	#include <syslog.h>
95	#include <string.h>
96	#include <fcntl.h>
97	#include <errno.h>
98	#include <limits.h>
99	#ifdef HAVE_GETIFADDRS
100	#include <ifaddrs.h>
101	#endif
102
103	#include "rtsold.h"
104
105	extern int rssock;
106	static int ifsock;
107
108	static int get_llflag __P((const char *name));
109	#ifndef HAVE_GETIFADDRS
110	static unsigned int if_maxindex __P((void));
111	#endif
112	static void get_rtaddrs __P((int addrs, struct sockaddr *sa,
113	struct sockaddr **rti_info));
114
115	int
116	ifinit()
117	{
118	ifsock = rssock;
119
120	return(0);
121	}
122
123	int
124	interface_up(char *name)
125	{
126	struct ifreq ifr;
127	int llflag;
128
129	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
130
131	if (ioctl(ifsock, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
132	warnmsg(LOG_WARNING, __FUNCTION__, "ioctl(SIOCGIFFLAGS): %s",
133	strerror(errno));
134	return(-1);
135	}
136	if (!(ifr.ifr_flags & IFF_UP)) {
137	ifr.ifr_flags \|= IFF_UP;
138	if (ioctl(ifsock, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
139	warnmsg(LOG_ERR, __FUNCTION__,
140	"ioctl(SIOCSIFFLAGS): %s", strerror(errno));
141	}
142	return(-1);
143	}
144
145	warnmsg(LOG_DEBUG, __FUNCTION__, "checking if %s is ready...", name);
146
147	llflag = get_llflag(name);
148	if (llflag < 0) {
149	warnmsg(LOG_WARNING, __FUNCTION__,
150	"get_llflag() failed, anyway I'll try");
151	return 0;
152	}
153
154	if (!(llflag & IN6_IFF_NOTREADY)) {
155	warnmsg(LOG_DEBUG, __FUNCTION__,
156	"%s is ready", name);
157	return(0);
158	} else {
159	if (llflag & IN6_IFF_TENTATIVE) {
160	warnmsg(LOG_DEBUG, __FUNCTION__, "%s is tentative",
161	name);
162	return IFS_TENTATIVE;
163	}
164	if (llflag & IN6_IFF_DUPLICATED)
165	warnmsg(LOG_DEBUG, __FUNCTION__, "%s is duplicated",
166	name);
167	return -1;
168	}
169	}
170
171	int
172	interface_status(struct ifinfo *ifinfo)
173	{
174	char *ifname = ifinfo->ifname;
175	struct ifreq ifr;
176	struct ifmediareq ifmr;
177
178	/* get interface flags */
179	memset(&ifr, 0, sizeof(ifr));
180	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
181	if (ioctl(ifsock, SIOCGIFFLAGS, &ifr) < 0) {
182	warnmsg(LOG_ERR, __FUNCTION__, "ioctl(SIOCGIFFLAGS) on %s: %s",
183	ifname, strerror(errno));
184	return(-1);
185	}
186	/*
187	* if one of UP and RUNNING flags is dropped,
188	* the interface is not active.
189	*/
190	if ((ifr.ifr_flags & (IFF_UP\|IFF_RUNNING)) != (IFF_UP\|IFF_RUNNING)) {
191	goto inactive;
192	}
193
194	/* Next, check carrier on the interface, if possible */
195	if (!ifinfo->mediareqok)
196	goto active;
197	memset(&ifmr, 0, sizeof(ifmr));
198	strncpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
199
200	if (ioctl(ifsock, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
201	if (errno != EINVAL) {
202	warnmsg(LOG_DEBUG, __FUNCTION__,
203	"ioctl(SIOCGIFMEDIA) on %s: %s",
204	ifname, strerror(errno));
205	return(-1);
206	}
207	/*
208	* EINVAL simply means that the interface does not support
209	* the SIOCGIFMEDIA ioctl. We regard it alive.
210	*/
211	ifinfo->mediareqok = 0;
212	goto active;
213	}
214
215	if (ifmr.ifm_status & IFM_AVALID) {
216	switch(ifmr.ifm_active & IFM_NMASK) {
217	case IFM_ETHER:
218	if (ifmr.ifm_status & IFM_ACTIVE)
219	goto active;
220	else
221	goto inactive;
222	break;
223	default:
224	goto inactive;
225	}
226	}
227
228	inactive:
229	return(0);
230
231	active:
232	return(1);
233	}
234
235	#define ROUNDUP(a, size) \
236	(((a) & ((size)-1)) ? (1 + ((a) \| ((size)-1))) : (a))
237
238	#define NEXT_SA(ap) (ap) = (struct sockaddr *) \
239	((caddr_t)(ap) + ((ap)->sa_len ? ROUNDUP((ap)->sa_len,\
9c859447 A	240	sizeof(uint32_t)) :\
9c859447 A	241	sizeof(uint32_t)))
7ba0088d A	242	#define ROUNDUP8(a) (1 + (((a) - 1) \| 7))
	243
	244	int
	245	lladdropt_length(struct sockaddr_dl *sdl)
	246	{
	247	switch(sdl->sdl_type) {
	248	case IFT_ETHER:
	249	#ifdef IFT_IEEE80211
	250	case IFT_IEEE80211:
	251	#endif
	252	return(ROUNDUP8(ETHER_ADDR_LEN + 2));
	253	default:
	254	return(0);
	255	}
	256	}
	257
	258	void
	259	lladdropt_fill(struct sockaddr_dl sdl, struct nd_opt_hdr ndopt)
	260	{
	261	char *addr;
	262
	263	ndopt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; /* fixed */
	264
	265	switch(sdl->sdl_type) {
	266	case IFT_ETHER:
	267	#ifdef IFT_IEEE80211
	268	case IFT_IEEE80211:
	269	#endif
	270	ndopt->nd_opt_len = (ROUNDUP8(ETHER_ADDR_LEN + 2)) >> 3;
	271	addr = (char *)(ndopt + 1);
	272	memcpy(addr, LLADDR(sdl), ETHER_ADDR_LEN);
	273	break;
	274	default:
	275	warnmsg(LOG_ERR, __FUNCTION__,
	276	"unsupported link type(%d)", sdl->sdl_type);
	277	exit(1);
	278	}
	279
	280	return;
	281	}
	282
	283	struct sockaddr_dl *
	284	if_nametosdl(char *name)
	285	{
	286	int mib[6] = {CTL_NET, AF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
	287	char buf, next, *lim;
	288	size_t len;
	289	struct if_msghdr *ifm;
	290	struct sockaddr sa, rti_info[RTAX_MAX];
	291	struct sockaddr_dl sdl = NULL, ret_sdl;
	292
	293	if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
	294	return(NULL);
	295	if ((buf = malloc(len)) == NULL)
	296	return(NULL);
	297	if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
	298	free(buf);
	299	return(NULL);
	300	}
	301
	302	lim = buf + len;
	303	for (next = buf; next < lim; next += ifm->ifm_msglen) {
	304	ifm = (struct if_msghdr *)next;
	305	if (ifm->ifm_type == RTM_IFINFO) {
306	sa = (struct sockaddr *)(ifm + 1);
307	get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
308	if ((sa = rti_info[RTAX_IFP]) != NULL) {
309	if (sa->sa_family == AF_LINK) {
310	sdl = (struct sockaddr_dl *)sa;
311	if (strlen(name) != sdl->sdl_nlen)
312	continue; /* not same len */
313	if (strncmp(&sdl->sdl_data[0],
314	name,
315	sdl->sdl_nlen) == 0) {
316	break;
317	}
318	}
319	}
320	}
321	}
322	if (next == lim) {
323	/* search failed */
324	free(buf);
325	return(NULL);
326	}
327
328	if ((ret_sdl = malloc(sdl->sdl_len)) == NULL)
329	return(NULL);
330	memcpy((caddr_t)ret_sdl, (caddr_t)sdl, sdl->sdl_len);
331
332	free(buf);
333	return(ret_sdl);
334	}
335
336	int
337	getinet6sysctl(int code)
338	{
339	int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
340	int value;
341	size_t size;
342
343	mib[3] = code;
344	size = sizeof(value);
345	if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size, NULL, 0) < 0)
346	return -1;
347	else
348	return value;
349	}
350
351	/------------------------------------------------------------/
352
353	/* get ia6_flags for link-local addr on if. returns -1 on error. */
354	static int
355	get_llflag(const char *name)
356	{
357	#ifdef HAVE_GETIFADDRS
358	struct ifaddrs ifap, ifa;
359	struct in6_ifreq ifr6;
360	struct sockaddr_in6 *sin6;
361	int s;
362
363	if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
364	warnmsg(LOG_ERR, __FUNCTION__, "socket(SOCK_DGRAM): %s",
365	strerror(errno));
366	exit(1);
367	}
368	if (getifaddrs(&ifap) != 0) {
369	warnmsg(LOG_ERR, __FUNCTION__, "etifaddrs: %s",
370	strerror(errno));
371	exit(1);
372	}
373
374	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
375	if (strlen(ifa->ifa_name) != strlen(name)
376	\|\| strncmp(ifa->ifa_name, name, strlen(name)) != 0)
377	continue;
378	if (ifa->ifa_addr->sa_family != AF_INET6)
379	continue;
380	sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
381	if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
382	continue;
383
384	memset(&ifr6, 0, sizeof(ifr6));
fdfd5971	385	strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name));
7ba0088d A	386	memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
	387	if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
	388	warnmsg(LOG_ERR, __FUNCTION__,
	389	"ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
	390	exit(1);
	391	}
	392
	393	freeifaddrs(ifap);
	394	close(s);
	395	return ifr6.ifr_ifru.ifru_flags6;
	396	}
	397
	398	freeifaddrs(ifap);
	399	close(s);
	400	return -1;
	401	#else
	402	int s;
	403	unsigned int maxif;
	404	struct ifreq *iflist;
	405	struct ifconf ifconf;
	406	struct ifreq ifr, ifr_end;
	407	struct sockaddr_in6 *sin6;
	408	struct in6_ifreq ifr6;
	409
	410	maxif = if_maxindex() + 1;
	411	iflist = (struct ifreq )malloc(maxif BUFSIZ); /* XXX */
	412	if (iflist == NULL) {
	413	warnmsg(LOG_ERR, __FUNCTION__, "not enough core");
	414	exit(1);
	415	}
	416
	417	if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
	418	warnmsg(LOG_ERR, __FUNCTION__, "socket(SOCK_DGRAM): %s",
	419	strerror(errno));
	420	exit(1);
	421	}
	422	memset(&ifconf, 0, sizeof(ifconf));
	423	ifconf.ifc_req = iflist;
	424	ifconf.ifc_len = maxif * BUFSIZ; /* XXX */
	425	if (ioctl(s, SIOCGIFCONF, &ifconf) < 0) {
	426	warnmsg(LOG_ERR, __FUNCTION__, "ioctl(SIOCGIFCONF): %s",
	427	strerror(errno));
	428	exit(1);
	429	}
	430
	431	/* Look for this interface in the list */
	432	ifr_end = (struct ifreq *) (ifconf.ifc_buf + ifconf.ifc_len);
	433	for (ifr = ifconf.ifc_req;
	434	ifr < ifr_end;
	435	ifr = (struct ifreq ) ((char ) &ifr->ifr_addr
	436	+ ifr->ifr_addr.sa_len)) {
	437	if (strlen(ifr->ifr_name) != strlen(name)
	438	\|\| strncmp(ifr->ifr_name, name, strlen(name)) != 0)
	439	continue;
	440	if (ifr->ifr_addr.sa_family != AF_INET6)
	441	continue;
	442	sin6 = (struct sockaddr_in6 *)&ifr->ifr_addr;
	443	if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
	444	continue;
	445
	446	memset(&ifr6, 0, sizeof(ifr6));
fdfd5971	447	strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name));
7ba0088d A	448	memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
	449	if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
	450	warnmsg(LOG_ERR, __FUNCTION__,
	451	"ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
	452	exit(1);
	453	}
	454
	455	free(iflist);
	456	close(s);
	457	return ifr6.ifr_ifru.ifru_flags6;
	458	}
	459
	460	free(iflist);
	461	close(s);
	462	return -1;
	463	#endif
	464	}
	465
	466	#ifndef HAVE_GETIFADDRS
	467	static unsigned int
	468	if_maxindex()
	469	{
	470	struct if_nameindex p, p0;
	471	unsigned int max = 0;
	472
	473	p0 = if_nameindex();
	474	for (p = p0; p && p->if_index && p->if_name; p++) {
	475	if (max < p->if_index)
	476	max = p->if_index;
	477	}
	478	if_freenameindex(p0);
	479	return max;
	480	}
	481	#endif
	482
	483	static void
	484	get_rtaddrs(int addrs, struct sockaddr sa, struct sockaddr *rti_info)
	485	{
	486	int i;
	487
	488	for (i = 0; i < RTAX_MAX; i++) {
	489	if (addrs & (1 << i)) {
	490	rti_info[i] = sa;
	491	NEXT_SA(sa);
	492	}
	493	else
	494	rti_info[i] = NULL;
	495	}
	496	}