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      1 /*	$NetBSD: af_link.c,v 1.8 2019/08/16 10:33:17 msaitoh 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 1.8 2019/08/16 10:33:17 msaitoh 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 }
    133