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agr.c revision 1.7 
      1 /*	$NetBSD: agr.c,v 1.7 2008/05/06 21:16:52 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 1.7 2008/05/06 21:16:52 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 	const char *port;
     80 	const char *ifname;
     81 	struct ifreq ifr;
     82 	int64_t cmd;
     83 
     84 	if ((s = getsock(AF_UNSPEC)) == -1)
     85 		err(EXIT_FAILURE, "%s: getsock", __func__);
     86 
     87 	assertifname(ifr.ifr_name);
     88 
     89 	if (!prop_dictionary_get_int64(env, "agrcmd", &cmd)) {
     90 		warnx("%s.%d", __func__, __LINE__);
     91 		errno = ENOENT;
     92 		return -1;
     93 	}
     94 
     95 	if (!prop_dictionary_get_cstring_nocopy(env, "agrport", &port)) {
     96 		warnx("%s.%d", __func__, __LINE__);
     97 		errno = ENOENT;
     98 		return -1;
     99 	}
    100 	strlcpy(buf, port, sizeof(buf));
    101 
    102 	memset(&ifr, 0, sizeof(ifr));
    103 	if ((ifname = getifname(env)) == NULL)
    104 		err(EXIT_FAILURE, "%s: getifname", __func__);
    105 	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
    106 	memset(&ar, 0, sizeof(ar));
    107 	ar.ar_version = AGRREQ_VERSION;
    108 	ar.ar_cmd = cmd;
    109 	ar.ar_buf = buf;
    110 	ar.ar_buflen = strlen(buf);
    111 	ifr.ifr_data = &ar;
    112 
    113 	if (ioctl(s, SIOCSETAGR, &ifr) == -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 	int s;
    128 	const char *ifname;
    129 	struct ifreq ifr;
    130 
    131 	if ((s = getsock(AF_UNSPEC)) == -1)
    132 		err(EXIT_FAILURE, "%s: getsock", __func__);
    133 
    134 	memset(&ifr, 0, sizeof(ifr));
    135 	if ((ifname = getifname(env)) == NULL)
    136 		err(EXIT_FAILURE, "%s: getifname", __func__);
    137 	if (checkifname(ifname))
    138 		return;
    139 	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
    140 
    141 again:
    142 	memset(&ar, 0, sizeof(ar));
    143 	ar.ar_version = AGRREQ_VERSION;
    144 	ar.ar_cmd = AGRCMD_PORTLIST;
    145 	ar.ar_buf = buf;
    146 	ar.ar_buflen = buflen;
    147 	ifr.ifr_data = &ar;
    148 
    149 	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
    150 		if (errno != E2BIG) {
    151 			warn("SIOCGETAGR");
    152 			return;
    153 		}
    154 
    155 		free(buf);
    156 		buf = NULL;
    157 		buflen = 0;
    158 		goto again;
    159 	}
    160 
    161 	if (buf == NULL) {
    162 		buflen = ar.ar_buflen;
    163 		buf = malloc(buflen);
    164 		if (buf == NULL) {
    165 			err(EXIT_FAILURE, "agr_status");
    166 		}
    167 		goto again;
    168 	}
    169 
    170 	apl = buf;
    171 	api = (void *)(apl + 1);
    172 
    173 	for (i = 0; i < apl->apl_nports; i++) {
    174 		char tmp[256];
    175 
    176 		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
    177 		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
    178 		api++;
    179 	}
    180 }
    181