sbin/ifconfig/af_link.c

   1 /*      $NetBSD: af_link.c,v 1.7 2014/01/19 22:31:13 matt 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 1.7 2014/01/19 22:31:13 matt 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_inetany.h"
  53
  54 static void link_status(prop_dictionary_t, prop_dictionary_t, bool);
  55 static void link_commit_address(prop_dictionary_t, prop_dictionary_t);
  56
  57 static const struct kwinst linkkw[] = {
  58           {.k_word = "active", .k_key = "active", .k_type = KW_T_BOOL,
  59            .k_bool = true, .k_nextparser = &command_root.pb_parser}
  60 };
  61
  62 struct pkw link_pkw = PKW_INITIALIZER(&link_pkw, "link", NULL, NULL,
  63     linkkw, __arraycount(linkkw), NULL);
  64
  65 static struct afswtch af = {
  66         .af_name = "link", .af_af = AF_LINK, .af_status = link_status,
  67         .af_addr_commit = link_commit_address
  68 };
  69
  70 static cmdloop_branch_t branch;
  71
  72 static void link_constructor(void) __attribute__((constructor));
  73
  74 static void
  75 link_status(prop_dictionary_t env, prop_dictionary_t oenv, bool force)
  76 {
  77         print_link_addresses(env, false);
  78 }
  79
  80 static int
  81 link_pre_aifaddr(prop_dictionary_t env, const struct afparam *param)
  82 {
  83         bool active;
  84         struct if_laddrreq *iflr = param->req.buf;
  85
  86         if (prop_dictionary_get_bool(env, "active", &active) && active)
  87                 iflr->flags |= IFLR_ACTIVE;
  88
  89         return 0;
  90 }
  91
  92 static void
  93 link_commit_address(prop_dictionary_t env, prop_dictionary_t oenv)
  94 {
  95         struct if_laddrreq dgreq = {
  96                 .addr = {
  97                         .ss_family = AF_LINK,
  98                         .ss_len = sizeof(dgreq.addr),
  99                 },
 100         };
 101         struct if_laddrreq req = {
 102                 .addr = {
 103                         .ss_family = AF_LINK,
 104                         .ss_len = sizeof(req.addr),
 105                 }
 106         };
 107         struct afparam linkparam = {
 108                   .req = BUFPARAM(req)
 109                 , .dgreq = BUFPARAM(dgreq)
 110                 , .name = {
 111                         {.buf = dgreq.iflr_name,
 112                          .buflen = sizeof(dgreq.iflr_name)},
 113                         {.buf = req.iflr_name,
 114                          .buflen = sizeof(req.iflr_name)}
 115                   }
 116                 , .dgaddr = BUFPARAM(dgreq.addr)
 117                 , .addr = BUFPARAM(req.addr)
 118                 , .aifaddr = IFADDR_PARAM(SIOCALIFADDR)
 119                 , .difaddr = IFADDR_PARAM(SIOCDLIFADDR)
 120                 , .gifaddr = IFADDR_PARAM(0)
 121                 , .pre_aifaddr = link_pre_aifaddr
 122         };
 123         commit_address(env, oenv, &linkparam);
 124 }
 125
 126 static void
 127 link_constructor(void)
 128 {
 129         register_family(&af);
 130         cmdloop_branch_init(&branch, &link_pkw.pk_parser);
 131         register_cmdloop_branch(&branch);
 132 }