ifconfig.tproj/af_link.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 static const char rcsid[] =
  32   "$FreeBSD: src/sbin/ifconfig/af_link.c,v 1.4.6.1 2008/11/25 02:59:29 kensmith Exp $";
  33 #endif /* not lint */
  34
  35 #include <sys/types.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/socket.h>
  38 #include <net/if.h>
  39
  40 #include <err.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <ifaddrs.h>
  45
  46 #include <net/if_dl.h>
  47 #include <net/if_types.h>
  48 #include <net/ethernet.h>
  49
  50 #include "ifconfig.h"
  51
  52 static struct ifreq link_ridreq;
  53
  54 static void
  55 link_status(int s __unused, const struct ifaddrs *ifa)
  56 {
  57         /* XXX no const 'cuz LLADDR is defined wrong */
  58         struct sockaddr_dl *sdl = (struct sockaddr_dl *) ifa->ifa_addr;
  59
  60         if (sdl != NULL && sdl->sdl_alen > 0) {
  61 #ifdef notyet
  62                 if (sdl->sdl_type == IFT_ETHER &&
  63                     sdl->sdl_alen == ETHER_ADDR_LEN)
  64                         printf("\tether %s\n",
  65                             ether_ntoa((struct ether_addr *)LLADDR(sdl)));
  66                 else {
  67                         int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
  68
  69                         printf("\tlladdr %s\n", link_ntoa(sdl) + n);
  70                 }
  71 #else
  72                 char *cp = (char *)LLADDR(sdl);
  73                 int n = sdl->sdl_alen;
  74
  75                 if (sdl->sdl_type == IFT_ETHER)
  76                         printf ("\tether ");
  77                 else
  78                         printf ("\tlladdr ");
  79                 while (--n >= 0)
  80                         printf("%02x%c",*cp++ & 0xff, n>0? ':' : ' ');
  81                 putchar('\n');
  82 #endif
  83         }
  84 }
  85
  86 static void
  87 link_getaddr(const char *addr, int which)
  88 {
  89         char *temp;
  90         struct sockaddr_dl sdl;
  91         struct sockaddr *sa = &link_ridreq.ifr_addr;
  92
  93         if (which != ADDR)
  94                 errx(1, "can't set link-level netmask or broadcast");
  95         if ((temp = malloc(strlen(addr) + 2)) == NULL)
  96                 errx(1, "malloc failed");
  97         temp[0] = ':';
  98         strcpy(temp + 1, addr);
  99         sdl.sdl_len = sizeof(sdl);
 100         link_addr(temp, &sdl);
 101         free(temp);
 102         if (sdl.sdl_alen > sizeof(sa->sa_data))
 103                 errx(1, "malformed link-level address");
 104         sa->sa_family = AF_LINK;
 105         sa->sa_len = sdl.sdl_alen;
 106         bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen);
 107 }
 108
 109 static struct afswtch af_link = {
 110         .af_name        = "link",
 111         .af_af          = AF_LINK,
 112         .af_status      = link_status,
 113         .af_getaddr     = link_getaddr,
 114         .af_aifaddr     = SIOCSIFLLADDR,
 115         .af_addreq      = &link_ridreq,
 116 };
 117 static struct afswtch af_ether = {
 118         .af_name        = "ether",
 119         .af_af          = AF_LINK,
 120         .af_status      = link_status,
 121         .af_getaddr     = link_getaddr,
 122         .af_aifaddr     = SIOCSIFLLADDR,
 123         .af_addreq      = &link_ridreq,
 124 };
 125 static struct afswtch af_lladdr = {
 126         .af_name        = "lladdr",
 127         .af_af          = AF_LINK,
 128         .af_status      = link_status,
 129         .af_getaddr     = link_getaddr,
 130         .af_aifaddr     = SIOCSIFLLADDR,
 131         .af_addreq      = &link_ridreq,
 132 };
 133
 134 static __constructor void
 135 link_ctor(void)
 136 {
 137         af_register(&af_link);
 138         af_register(&af_ether);
 139         af_register(&af_lladdr);
 140 }