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agr.c revision 1.6 
      1 /*	$NetBSD: agr.c,v 1.6 2008/05/06 17:29:04 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 1.6 2008/05/06 17:29:04 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 "env.h"
     49 #include "parse.h"
     50 #include "extern.h"
     51 #include "agr.h"
     52 
     53 static int checkifname(const char *);
     54 static void assertifname(const char *);
     55 
     56 static int
     57 checkifname(const char *ifname)
     58 {
     59 
     60 	return strncmp(ifname, "agr", 3) != 0 ||
     61 	    !isdigit((unsigned char)ifname[3]);
     62 }
     63 
     64 static void
     65 assertifname(const char *ifname)
     66 {
     67 
     68 	if (checkifname(ifname)) {
     69 		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
     70 	}
     71 }
     72 
     73 int
     74 agrsetport(prop_dictionary_t env, prop_dictionary_t xenv)
     75 {
     76 	char buf[IFNAMSIZ];
     77 	struct agrreq ar;
     78 	int s;
     79 	prop_string_t str;
     80 	prop_number_t num;
     81 	const char *ifname;
     82 	struct ifreq ifr;
     83 
     84 	if ((s = getsock(AF_UNSPEC)) == -1)
     85 		err(EXIT_FAILURE, "%s: getsock", __func__);
     86 
     87 	assertifname(ifr.ifr_name);
     88 
     89 	num = (prop_number_t)prop_dictionary_get(env, "agrcmd");
     90 	if (num == NULL) {
     91 		warnx("%s.%d", __func__, __LINE__);
     92 		errno = ENOENT;
     93 		return -1;
     94 	}
     95 
     96 	str = (prop_string_t)prop_dictionary_get(env, "agrport");
     97 	if (str == NULL) {
     98 		warnx("%s.%d", __func__, __LINE__);
     99 		errno = ENOENT;
    100 		return -1;
    101 	}
    102 	strlcpy(buf, prop_string_cstring_nocopy(str), sizeof(buf));
    103 
    104 	memset(&ifr, 0, sizeof(ifr));
    105 	if ((ifname = getifname(env)) == NULL)
    106 		err(EXIT_FAILURE, "%s: getifname", __func__);
    107 	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
    108 	memset(&ar, 0, sizeof(ar));
    109 	ar.ar_version = AGRREQ_VERSION;
    110 	ar.ar_cmd = (int)prop_number_integer_value(num);
    111 	ar.ar_buf = buf;
    112 	ar.ar_buflen = strlen(buf);
    113 	ifr.ifr_data = &ar;
    114 
    115 	if (ioctl(s, SIOCSETAGR, &ifr) == -1)
    116 		err(EXIT_FAILURE, "SIOCSETAGR");
    117 	return 0;
    118 }
    119 
    120 void
    121 agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
    122 {
    123 	struct agrreq ar;
    124 	void *buf = NULL;
    125 	size_t buflen = 0;
    126 	struct agrportlist *apl;
    127 	struct agrportinfo *api;
    128 	int i;
    129 	int s;
    130 	const char *ifname;
    131 	struct ifreq ifr;
    132 
    133 	if ((s = getsock(AF_UNSPEC)) == -1)
    134 		err(EXIT_FAILURE, "%s: getsock", __func__);
    135 
    136 	memset(&ifr, 0, sizeof(ifr));
    137 	if ((ifname = getifname(env)) == NULL)
    138 		err(EXIT_FAILURE, "%s: getifname", __func__);
    139 	if (checkifname(ifname))
    140 		return;
    141 	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
    142 
    143 again:
    144 	memset(&ar, 0, sizeof(ar));
    145 	ar.ar_version = AGRREQ_VERSION;
    146 	ar.ar_cmd = AGRCMD_PORTLIST;
    147 	ar.ar_buf = buf;
    148 	ar.ar_buflen = buflen;
    149 	ifr.ifr_data = &ar;
    150 
    151 	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
    152 		if (errno != E2BIG) {
    153 			warn("SIOCGETAGR");
    154 			return;
    155 		}
    156 
    157 		free(buf);
    158 		buf = NULL;
    159 		buflen = 0;
    160 		goto again;
    161 	}
    162 
    163 	if (buf == NULL) {
    164 		buflen = ar.ar_buflen;
    165 		buf = malloc(buflen);
    166 		if (buf == NULL) {
    167 			err(EXIT_FAILURE, "agr_status");
    168 		}
    169 		goto again;
    170 	}
    171 
    172 	apl = buf;
    173 	api = (void *)(apl + 1);
    174 
    175 	for (i = 0; i < apl->apl_nports; i++) {
    176 		char tmp[256];
    177 
    178 		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
    179 		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
    180 		api++;
    181 	}
    182 }
    183