sbin/ifconfig/af_atalk.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  * $FreeBSD: src/sbin/ifconfig/af_atalk.c,v 1.1 2004/12/08 19:18:07 sam Exp $
  30  * $DragonFly: src/sbin/ifconfig/af_atalk.c,v 1.1 2006/04/02 03:33:59 sephe Exp $
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/ioctl.h>
  35 #include <sys/socket.h>
  36 #include <net/if.h>
  37 #include <net/route.h>          /* for RTX_IFA */
  38
  39 #include <netatalk/at.h>
  40
  41 #include <err.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46
  47 #include <arpa/inet.h>
  48
  49 #include "ifconfig.h"
  50
  51 static struct netrange at_nr;           /* AppleTalk net range */
  52 static struct ifaliasreq at_addreq;
  53
  54 /* XXX  FIXME -- should use strtoul for better parsing. */
  55 static void
  56 setatrange(const char *range, int dummy __unused, int s,
  57     const struct afswtch *afp)
  58 {
  59         u_int   first = 123, last = 123;
  60
  61         if (sscanf(range, "%u-%u", &first, &last) != 2
  62             || first == 0 || first > 0xffff
  63             || last == 0 || last > 0xffff || first > last)
  64                 errx(1, "%s: illegal net range: %u-%u", range, first, last);
  65         at_nr.nr_firstnet = htons(first);
  66         at_nr.nr_lastnet = htons(last);
  67 }
  68
  69 static void
  70 setatphase(const char *phase, int dummy __unused, int s,
  71     const struct afswtch *afp)
  72 {
  73         if (!strcmp(phase, "1"))
  74                 at_nr.nr_phase = 1;
  75         else if (!strcmp(phase, "2"))
  76                 at_nr.nr_phase = 2;
  77         else
  78                 errx(1, "%s: illegal phase", phase);
  79 }
  80
  81 static void
  82 at_status(int s __unused, const struct rt_addrinfo * info)
  83 {
  84         struct sockaddr_at *sat, null_sat;
  85         struct netrange *nr;
  86
  87         memset(&null_sat, 0, sizeof(null_sat));
  88
  89         sat = (struct sockaddr_at *)info->rti_info[RTAX_IFA];
  90         if (sat == NULL)
  91                 return;
  92         nr = &sat->sat_range.r_netrange;
  93         printf("\tatalk %d.%d range %d-%d phase %d",
  94                 ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node,
  95                 ntohs(nr->nr_firstnet), ntohs(nr->nr_lastnet), nr->nr_phase);
  96         if (flags & IFF_POINTOPOINT) {
  97                 /* note RTAX_BRD overlap with IFF_BROADCAST */
  98                 sat = (struct sockaddr_at *)info->rti_info[RTAX_BRD];
  99                 if (!sat)
 100                         sat = &null_sat;
 101                 printf("--> %d.%d",
 102                         ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node);
 103         }
 104         if (flags & IFF_BROADCAST) {
 105                 /* note RTAX_BRD overlap with IFF_POINTOPOINT */
 106                 sat = (struct sockaddr_at *)info->rti_info[RTAX_BRD];
 107                 if (sat)
 108                         printf(" broadcast %d.%d",
 109                                 ntohs(sat->sat_addr.s_net),
 110                                 sat->sat_addr.s_node);
 111         }
 112
 113         putchar('\n');
 114 }
 115
 116 static void
 117 at_getaddr(const char *addr, int which)
 118 {
 119         struct sockaddr_at *sat = (struct sockaddr_at *) &at_addreq.ifra_addr;
 120         u_int net, node;
 121
 122         sat->sat_family = AF_APPLETALK;
 123         sat->sat_len = sizeof(*sat);
 124         if (which == MASK)
 125                 errx(1, "AppleTalk does not use netmasks");
 126         if (sscanf(addr, "%u.%u", &net, &node) != 2
 127             || net > 0xffff || node > 0xfe)
 128                 errx(1, "%s: illegal address", addr);
 129         sat->sat_addr.s_net = htons(net);
 130         sat->sat_addr.s_node = node;
 131 }
 132
 133 static void
 134 at_postproc(int s, const struct afswtch *afp)
 135 {
 136         struct sockaddr_at *sat = (struct sockaddr_at *) &at_addreq.ifra_addr;
 137
 138         if (at_nr.nr_phase == 0)
 139                 at_nr.nr_phase = 2;     /* Default phase 2 */
 140         if (at_nr.nr_firstnet == 0)
 141                 at_nr.nr_firstnet =     /* Default range of one */
 142                 at_nr.nr_lastnet = sat->sat_addr.s_net;
 143         printf("\tatalk %d.%d range %d-%d phase %d\n",
 144                 ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node,
 145                 ntohs(at_nr.nr_firstnet), ntohs(at_nr.nr_lastnet),
 146                 at_nr.nr_phase);
 147         if ((u_short) ntohs(at_nr.nr_firstnet) >
 148                         (u_short) ntohs(sat->sat_addr.s_net)
 149                     || (u_short) ntohs(at_nr.nr_lastnet) <
 150                         (u_short) ntohs(sat->sat_addr.s_net))
 151                 errx(1, "AppleTalk address is not in range");
 152         sat->sat_range.r_netrange = at_nr;
 153 }
 154
 155 static struct cmd atalk_cmds[] = {
 156         DEF_CMD_ARG("range",    setatrange),
 157         DEF_CMD_ARG("phase",    setatphase),
 158 };
 159
 160 static struct afswtch af_atalk = {
 161         .af_name        = "atalk",
 162         .af_af          = AF_APPLETALK,
 163         .af_status      = at_status,
 164         .af_getaddr     = at_getaddr,
 165         .af_postproc    = at_postproc,
 166         .af_difaddr     = SIOCDIFADDR,
 167         .af_aifaddr     = SIOCAIFADDR,
 168         .af_ridreq      = &at_addreq,
 169         .af_addreq      = &at_addreq,
 170 };
 171
 172 static __constructor void
 173 atalk_ctor(void)
 174 {
 175 #define N(a)    (sizeof(a) / sizeof(a[0]))
 176         int i;
 177
 178         for (i = 0; i < N(atalk_cmds);  i++)
 179                 cmd_register(&atalk_cmds[i]);
 180         af_register(&af_atalk);
 181 #undef N
 182 }