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agr.c revision 1.10 
      1 /*	$NetBSD: agr.c,v 1.10 2008/05/07 23:55:06 dyoung Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2005 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 #if !defined(lint)
     31 __RCSID("$NetBSD: agr.c,v 1.10 2008/05/07 23:55:06 dyoung Exp $");
     32 #endif /* !defined(lint) */
     33 
     34 #include <sys/param.h>
     35 #include <sys/ioctl.h>
     36 
     37 #include <net/if.h>
     38 #include <net/agr/if_agrioctl.h>
     39 
     40 #include <ctype.h>
     41 #include <err.h>
     42 #include <errno.h>
     43 #include <string.h>
     44 #include <stdio.h>
     45 #include <stdlib.h>
     46 #include <util.h>
     47 
     48 #include "agr.h"
     49 #include "env.h"
     50 #include "extern.h"
     51 #include "parse.h"
     52 #include "util.h"
     53 
     54 static int checkifname(prop_dictionary_t);
     55 static void assertifname(prop_dictionary_t);
     56 
     57 static const struct kwinst agrkw[] = {
     58 	  {.k_word = "agrport", .k_type = KW_T_NUM, .k_neg = true,
     59 	   .k_num = AGRCMD_ADDPORT, .k_negnum = AGRCMD_REMPORT,
     60 	   .k_exec = agrsetport}
     61 };
     62 
     63 struct pkw agr = PKW_INITIALIZER(&agr, "agr", NULL, NULL,
     64     agrkw, __arraycount(agrkw), NULL);
     65 
     66 static int
     67 checkifname(prop_dictionary_t env)
     68 {
     69 	const char *ifname;
     70 
     71 	if ((ifname = getifname(env)) == NULL)
     72 		return 1;
     73 
     74 	return strncmp(ifname, "agr", 3) != 0 ||
     75 	    !isdigit((unsigned char)ifname[3]);
     76 }
     77 
     78 static void
     79 assertifname(prop_dictionary_t env)
     80 {
     81 	if (checkifname(env))
     82 		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
     83 }
     84 
     85 int
     86 agrsetport(prop_dictionary_t env, prop_dictionary_t xenv)
     87 {
     88 	char buf[IFNAMSIZ];
     89 	struct agrreq ar;
     90 	const char *port;
     91 	int64_t cmd;
     92 
     93 	if (!prop_dictionary_get_int64(env, "agrcmd", &cmd)) {
     94 		warnx("%s.%d", __func__, __LINE__);
     95 		errno = ENOENT;
     96 		return -1;
     97 	}
     98 
     99 	if (!prop_dictionary_get_cstring_nocopy(env, "agrport", &port)) {
    100 		warnx("%s.%d", __func__, __LINE__);
    101 		errno = ENOENT;
    102 		return -1;
    103 	}
    104 	strlcpy(buf, port, sizeof(buf));
    105 
    106 	assertifname(env);
    107 	memset(&ar, 0, sizeof(ar));
    108 	ar.ar_version = AGRREQ_VERSION;
    109 	ar.ar_cmd = cmd;
    110 	ar.ar_buf = buf;
    111 	ar.ar_buflen = strlen(buf);
    112 
    113 	if (indirect_ioctl(env, SIOCSETAGR, &ar) == -1)
    114 		err(EXIT_FAILURE, "SIOCSETAGR");
    115 	return 0;
    116 }
    117 
    118 void
    119 agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
    120 {
    121 	struct agrreq ar;
    122 	void *buf = NULL;
    123 	size_t buflen = 0;
    124 	struct agrportlist *apl;
    125 	struct agrportinfo *api;
    126 	int i;
    127 
    128 	if (checkifname(env))
    129 		return;
    130 
    131 again:
    132 	memset(&ar, 0, sizeof(ar));
    133 	ar.ar_version = AGRREQ_VERSION;
    134 	ar.ar_cmd = AGRCMD_PORTLIST;
    135 	ar.ar_buf = buf;
    136 	ar.ar_buflen = buflen;
    137 
    138 	if (indirect_ioctl(env, SIOCGETAGR, &ar) == -1) {
    139 		if (errno != E2BIG) {
    140 			warn("SIOCGETAGR");
    141 			return;
    142 		}
    143 
    144 		free(buf);
    145 		buf = NULL;
    146 		buflen = 0;
    147 		goto again;
    148 	}
    149 
    150 	if (buf == NULL) {
    151 		buflen = ar.ar_buflen;
    152 		buf = malloc(buflen);
    153 		if (buf == NULL) {
    154 			err(EXIT_FAILURE, "agr_status");
    155 		}
    156 		goto again;
    157 	}
    158 
    159 	apl = buf;
    160 	api = (void *)(apl + 1);
    161 
    162 	for (i = 0; i < apl->apl_nports; i++) {
    163 		char tmp[256];
    164 
    165 		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
    166 		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
    167 		api++;
    168 	}
    169 }
    170