ifconfig.tproj/af_link.c

   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
  29 /*
  30  * Copyright (c) 1983, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #ifndef lint
  59 static const char rcsid[] =
  60   "$FreeBSD: src/sbin/ifconfig/af_link.c,v 1.4.6.1 2008/11/25 02:59:29 kensmith Exp $";
  61 #endif /* not lint */
  62
  63 #include <sys/types.h>
  64 #include <sys/ioctl.h>
  65 #include <sys/socket.h>
  66 #include <net/if.h>
  67
  68 #include <err.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <string.h>
  72 #include <ifaddrs.h>
  73
  74 #include <net/if_dl.h>
  75 #include <net/if_types.h>
  76 #include <net/ethernet.h>
  77
  78 #include "ifconfig.h"
  79
  80 static struct ifreq link_ridreq;
  81
  82 static void
  83 link_status(int s __unused, const struct ifaddrs *ifa)
  84 {
  85         /* XXX no const 'cuz LLADDR is defined wrong */
  86         struct sockaddr_dl *sdl = (struct sockaddr_dl *) ifa->ifa_addr;
  87
  88         if (sdl != NULL && sdl->sdl_alen > 0) {
  89 #ifdef notyet
  90                 if (sdl->sdl_type == IFT_ETHER &&
  91                     sdl->sdl_alen == ETHER_ADDR_LEN)
  92                         printf("\tether %s\n",
  93                             ether_ntoa((struct ether_addr *)LLADDR(sdl)));
  94                 else {
  95                         int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
  96
  97                         printf("\tlladdr %s\n", link_ntoa(sdl) + n);
  98                 }
  99 #else
 100                 char *cp = (char *)LLADDR(sdl);
 101                 int n = sdl->sdl_alen;
 102
 103                 if (sdl->sdl_type == IFT_ETHER)
 104                         printf ("\tether ");
 105                 else
 106                         printf ("\tlladdr ");
 107                 while (--n >= 0)
 108                         printf("%02x%c",*cp++ & 0xff, n>0? ':' : ' ');
 109                 putchar('\n');
 110 #endif
 111         }
 112 }
 113
 114 static void
 115 link_getaddr(const char *addr, int which)
 116 {
 117         char *temp;
 118         struct sockaddr_dl sdl;
 119         struct sockaddr *sa = &link_ridreq.ifr_addr;
 120         size_t slen = strlen(addr);
 121
 122         if (which != ADDR)
 123                 errx(1, "can't set link-level netmask or broadcast");
 124         if ((temp = malloc(slen + 2)) == NULL)
 125                 errx(1, "malloc failed");
 126         temp[0] = ':';
 127         strlcpy(temp + 1, addr, slen + 1);
 128         sdl.sdl_len = sizeof(sdl);
 129         link_addr(temp, &sdl);
 130         free(temp);
 131         if (sdl.sdl_alen > sizeof(sa->sa_data))
 132                 errx(1, "malformed link-level address");
 133         sa->sa_family = AF_LINK;
 134         sa->sa_len = sdl.sdl_alen;
 135         bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
 136 }
 137
 138 static struct afswtch af_link = {
 139         .af_name        = "link",
 140         .af_af          = AF_LINK,
 141         .af_status      = link_status,
 142         .af_getaddr     = link_getaddr,
 143         .af_aifaddr     = SIOCSIFLLADDR,
 144         .af_addreq      = &link_ridreq,
 145 };
 146 static struct afswtch af_ether = {
 147         .af_name        = "ether",
 148         .af_af          = AF_LINK,
 149         .af_status      = link_status,
 150         .af_getaddr     = link_getaddr,
 151         .af_aifaddr     = SIOCSIFLLADDR,
 152         .af_addreq      = &link_ridreq,
 153 };
 154 static struct afswtch af_lladdr = {
 155         .af_name        = "lladdr",
 156         .af_af          = AF_LINK,
 157         .af_status      = link_status,
 158         .af_getaddr     = link_getaddr,
 159         .af_aifaddr     = SIOCSIFLLADDR,
 160         .af_addreq      = &link_ridreq,
 161 };
 162
 163 static __constructor void
 164 link_ctor(void)
 165 {
 166         af_register(&af_link);
 167         af_register(&af_ether);
 168         af_register(&af_lladdr);
 169 }