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af_link.c revision 1.1 
      1 /*	$NetBSD: af_link.c,v 1.1 2008/05/12 22:06:13 dyoung Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 David Young.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 #ifndef lint
     30 __RCSID("$NetBSD: af_link.c,v 1.1 2008/05/12 22:06:13 dyoung Exp $");
     31 #endif /* not lint */
     32 
     33 #include <sys/param.h>
     34 #include <sys/ioctl.h>
     35 #include <sys/socket.h>
     36 
     37 #include <net/if.h>
     38 #include <net/if_dl.h>
     39 
     40 #include <assert.h>
     41 #include <err.h>
     42 #include <errno.h>
     43 #include <ifaddrs.h>
     44 #include <netdb.h>
     45 #include <string.h>
     46 #include <stdlib.h>
     47 #include <stdio.h>
     48 #include <util.h>
     49 
     50 #include "env.h"
     51 #include "extern.h"
     52 #include "af_link.h"
     53 #include "af_inetany.h"
     54 
     55 void
     56 link_status(prop_dictionary_t env, prop_dictionary_t oenv, bool force)
     57 {
     58 	const char *delim, *ifname;
     59 	int i, s;
     60 	struct ifaddrs *ifa, *ifap;
     61 	const struct sockaddr_dl *sdl;
     62 	struct if_laddrreq iflr;
     63 	const uint8_t *octets;
     64 
     65 	if ((ifname = getifname(env)) == NULL)
     66 		err(EXIT_FAILURE, "%s: getifname", __func__);
     67 
     68 	if ((s = getsock(AF_UNSPEC)) == -1)
     69 		err(EXIT_FAILURE, "%s: getsock", __func__);
     70 
     71 	if (getifaddrs(&ifap) == -1)
     72 		err(EXIT_FAILURE, "%s: getifaddrs", __func__);
     73 
     74 	memset(&iflr, 0, sizeof(iflr));
     75 
     76 	strlcpy(iflr.iflr_name, ifname, sizeof(iflr.iflr_name));
     77 
     78 	for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
     79 		if (strcmp(ifname, ifa->ifa_name) != 0)
     80 			continue;
     81 		if (ifa->ifa_addr->sa_family != AF_LINK)
     82 			continue;
     83 		if (ifa->ifa_data != NULL)
     84 			continue;
     85 
     86 		sdl = satocsdl(ifa->ifa_addr);
     87 
     88 		memcpy(&iflr.addr, ifa->ifa_addr, MIN(ifa->ifa_addr->sa_len,
     89 		    sizeof(iflr.addr)));
     90 		iflr.flags = IFLR_PREFIX;
     91 		iflr.prefixlen = sdl->sdl_alen * NBBY;
     92 
     93 		if (ioctl(s, SIOCGLIFADDR, &iflr) == -1)
     94 			err(EXIT_FAILURE, "%s: ioctl", __func__);
     95 
     96                 if ((iflr.flags & IFLR_ACTIVE) != 0)
     97 			continue;
     98 
     99 		octets = (const uint8_t *)&sdl->sdl_data[sdl->sdl_nlen];
    100 
    101 		delim = "\tlink ";
    102 		for (i = 0; i < sdl->sdl_alen; i++) {
    103 			printf("%s%02" PRIx8, delim, octets[i]);
    104 			delim = ":";
    105 		}
    106 		printf("\n");
    107 	}
    108 }
    109 
    110 static int
    111 link_pre_aifaddr(prop_dictionary_t env, struct afparam *param)
    112 {
    113 	bool active;
    114 	struct if_laddrreq *iflr = param->req.buf;
    115 
    116 	if (prop_dictionary_get_bool(env, "active", &active) && active)
    117 		iflr->flags |= IFLR_ACTIVE;
    118 
    119 	return 0;
    120 }
    121 
    122 void
    123 link_commit_address(prop_dictionary_t env, prop_dictionary_t oenv)
    124 {
    125 	struct if_laddrreq dgreq = {
    126 		.addr = {
    127 			.ss_family = AF_LINK,
    128 			.ss_len = sizeof(dgreq.addr),
    129 		},
    130 	};
    131 	struct if_laddrreq req = {
    132 		.addr = {
    133 			.ss_family = AF_LINK,
    134 			.ss_len = sizeof(req.addr),
    135 		}
    136 	};
    137 	struct afparam linkparam = {
    138 		  .req = BUFPARAM(req)
    139 		, .dgreq = BUFPARAM(dgreq)
    140 		, .name = {
    141 			{.buf = dgreq.iflr_name,
    142 			 .buflen = sizeof(dgreq.iflr_name)},
    143 			{.buf = req.iflr_name,
    144 			 .buflen = sizeof(req.iflr_name)}
    145 		  }
    146 		, .dgaddr = BUFPARAM(dgreq.addr)
    147 		, .addr = BUFPARAM(req.addr)
    148 		, .aifaddr = IFADDR_PARAM(SIOCALIFADDR)
    149 		, .difaddr = IFADDR_PARAM(SIOCDLIFADDR)
    150 		, .gifaddr = IFADDR_PARAM(0)
    151 		, .pre_aifaddr = link_pre_aifaddr
    152 	};
    153 	commit_address(env, oenv, &linkparam);
    154 }
    155