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agr.c revision 1.11 
      1 /*	$NetBSD: agr.c,v 1.11 2008/05/09 20:45:09 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 1.11 2008/05/09 20:45:09 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 struct piface agrif = PIFACE_INITIALIZER(&agrif, "agr interface",
     58     agrsetport, "agrport", &command_root.pb_parser);
     59 
     60 static const struct kwinst agrkw[] = {
     61 	  {.k_word = "agrport", .k_type = KW_T_NUM, .k_num = AGRCMD_ADDPORT,
     62 	   .k_nextparser = &agrif.pif_parser}
     63 	, {.k_word = "-agrport", .k_type = KW_T_NUM, .k_num = AGRCMD_REMPORT,
     64 	   .k_nextparser = &agrif.pif_parser}
     65 };
     66 
     67 struct pkw agr = PKW_INITIALIZER(&agr, "agr", NULL, "agrcmd",
     68     agrkw, __arraycount(agrkw), NULL);
     69 
     70 static int
     71 checkifname(prop_dictionary_t env)
     72 {
     73 	const char *ifname;
     74 
     75 	if ((ifname = getifname(env)) == NULL)
     76 		return 1;
     77 
     78 	return strncmp(ifname, "agr", 3) != 0 ||
     79 	    !isdigit((unsigned char)ifname[3]);
     80 }
     81 
     82 static void
     83 assertifname(prop_dictionary_t env)
     84 {
     85 	if (checkifname(env))
     86 		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
     87 }
     88 
     89 int
     90 agrsetport(prop_dictionary_t env, prop_dictionary_t xenv)
     91 {
     92 	char buf[IFNAMSIZ];
     93 	struct agrreq ar;
     94 	const char *port;
     95 	int64_t cmd;
     96 
     97 	if (!prop_dictionary_get_int64(env, "agrcmd", &cmd)) {
     98 		warnx("%s.%d", __func__, __LINE__);
     99 		errno = ENOENT;
    100 		return -1;
    101 	}
    102 
    103 	if (!prop_dictionary_get_cstring_nocopy(env, "agrport", &port)) {
    104 		warnx("%s.%d", __func__, __LINE__);
    105 		errno = ENOENT;
    106 		return -1;
    107 	}
    108 	strlcpy(buf, port, sizeof(buf));
    109 
    110 	assertifname(env);
    111 	memset(&ar, 0, sizeof(ar));
    112 	ar.ar_version = AGRREQ_VERSION;
    113 	ar.ar_cmd = cmd;
    114 	ar.ar_buf = buf;
    115 	ar.ar_buflen = strlen(buf);
    116 
    117 	if (indirect_ioctl(env, SIOCSETAGR, &ar) == -1)
    118 		err(EXIT_FAILURE, "SIOCSETAGR");
    119 	return 0;
    120 }
    121 
    122 void
    123 agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
    124 {
    125 	struct agrreq ar;
    126 	void *buf = NULL;
    127 	size_t buflen = 0;
    128 	struct agrportlist *apl;
    129 	struct agrportinfo *api;
    130 	int i;
    131 
    132 	if (checkifname(env))
    133 		return;
    134 
    135 again:
    136 	memset(&ar, 0, sizeof(ar));
    137 	ar.ar_version = AGRREQ_VERSION;
    138 	ar.ar_cmd = AGRCMD_PORTLIST;
    139 	ar.ar_buf = buf;
    140 	ar.ar_buflen = buflen;
    141 
    142 	if (indirect_ioctl(env, SIOCGETAGR, &ar) == -1) {
    143 		if (errno != E2BIG) {
    144 			warn("SIOCGETAGR");
    145 			return;
    146 		}
    147 
    148 		free(buf);
    149 		buf = NULL;
    150 		buflen = 0;
    151 		goto again;
    152 	}
    153 
    154 	if (buf == NULL) {
    155 		buflen = ar.ar_buflen;
    156 		buf = malloc(buflen);
    157 		if (buf == NULL) {
    158 			err(EXIT_FAILURE, "agr_status");
    159 		}
    160 		goto again;
    161 	}
    162 
    163 	apl = buf;
    164 	api = (void *)(apl + 1);
    165 
    166 	for (i = 0; i < apl->apl_nports; i++) {
    167 		char tmp[256];
    168 
    169 		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
    170 		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
    171 		api++;
    172 	}
    173 }
    174