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 #include <sys/types.h>
  59 #include <sys/ioctl.h>
  60 #include <sys/socket.h>
  61 #include <net/if.h>
  62
  63 #include <err.h>
  64 #include <stdio.h>
  65 #include <stdlib.h>
  66 #include <string.h>
  67 #include <ifaddrs.h>
  68
  69 #include <net/if_dl.h>
  70 #include <net/if_types.h>
  71 #include <net/ethernet.h>
  72
  73 #include "ifconfig.h"
  74
  75 static struct ifreq link_ridreq;
  76
  77 static void
  78 link_status(int s __unused, const struct ifaddrs *ifa)
  79 {
  80         /* XXX no const 'cuz LLADDR is defined wrong */
  81         struct sockaddr_dl *sdl = (struct sockaddr_dl *) ifa->ifa_addr;
  82
  83         if (sdl != NULL && sdl->sdl_alen > 0) {
  84 #ifdef notyet
  85                 if (sdl->sdl_type == IFT_ETHER &&
  86                     sdl->sdl_alen == ETHER_ADDR_LEN)
  87                         printf("\tether %s\n",
  88                             ether_ntoa((struct ether_addr *)LLADDR(sdl)));
  89                 else {
  90                         int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
  91
  92                         printf("\tlladdr %s\n", link_ntoa(sdl) + n);
  93                 }
  94 #else
  95                 char *cp = (char *)LLADDR(sdl);
  96                 int n = sdl->sdl_alen;
  97
  98                 if (sdl->sdl_type == IFT_ETHER)
  99                         printf ("\tether ");
 100                 else
 101                         printf ("\tlladdr ");
 102                 while (--n >= 0)
 103                         printf("%02x%c",*cp++ & 0xff, n>0? ':' : ' ');
 104                 putchar('\n');
 105 #endif
 106         }
 107 }
 108
 109 static void
 110 link_getaddr(const char *addr, int which)
 111 {
 112         char *temp;
 113         struct sockaddr_dl sdl;
 114         struct sockaddr *sa = &link_ridreq.ifr_addr;
 115         size_t slen = strlen(addr);
 116
 117         if (which != ADDR)
 118                 errx(1, "can't set link-level netmask or broadcast");
 119         if ((temp = malloc(slen + 2)) == NULL)
 120                 errx(1, "malloc failed");
 121         temp[0] = ':';
 122         strlcpy(temp + 1, addr, slen + 1);
 123         sdl.sdl_len = sizeof(sdl);
 124         link_addr(temp, &sdl);
 125         free(temp);
 126         if (sdl.sdl_alen > sizeof(sa->sa_data))
 127                 errx(1, "malformed link-level address");
 128         sa->sa_family = AF_LINK;
 129         sa->sa_len = sdl.sdl_alen;
 130         bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
 131 }
 132
 133 static struct afswtch af_link = {
 134         .af_name        = "link",
 135         .af_af          = AF_LINK,
 136         .af_status      = link_status,
 137         .af_getaddr     = link_getaddr,
 138         .af_aifaddr     = SIOCSIFLLADDR,
 139         .af_addreq      = &link_ridreq,
 140 };
 141 static struct afswtch af_ether = {
 142         .af_name        = "ether",
 143         .af_af          = AF_LINK,
 144         .af_status      = link_status,
 145         .af_getaddr     = link_getaddr,
 146         .af_aifaddr     = SIOCSIFLLADDR,
 147         .af_addreq      = &link_ridreq,
 148 };
 149 static struct afswtch af_lladdr = {
 150         .af_name        = "lladdr",
 151         .af_af          = AF_LINK,
 152         .af_status      = link_status,
 153         .af_getaddr     = link_getaddr,
 154         .af_aifaddr     = SIOCSIFLLADDR,
 155         .af_addreq      = &link_ridreq,
 156 };
 157
 158 static __constructor void
 159 link_ctor(void)
 160 {
 161         af_register(&af_link);
 162         af_register(&af_ether);
 163         af_register(&af_lladdr);
 164 }