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agr.c revision 1.2 
      1 /*	$NetBSD: agr.c,v 1.2 2005/03/19 03:56:06 thorpej 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 1.2 2005/03/19 03:56:06 thorpej 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 <stdlib.h>
     45 #include <util.h>
     46 
     47 #include "extern.h"
     48 #include "agr.h"
     49 
     50 static int checkifname(const char *);
     51 static void assertifname(const char *);
     52 
     53 static int
     54 checkifname(const char *name)
     55 {
     56 
     57 	return strncmp(name, "agr", 3) != 0 ||
     58 	    !isdigit((unsigned char)name[3]);
     59 }
     60 
     61 static void
     62 assertifname(const char *name)
     63 {
     64 
     65 	if (checkifname(name)) {
     66 		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
     67 	}
     68 }
     69 
     70 void
     71 agraddport(const char *val, int d)
     72 {
     73 	struct agrreq ar;
     74 
     75 	assertifname(ifr.ifr_name);
     76 
     77 	memset(&ar, 0, sizeof(ar));
     78 	ar.ar_version = AGRREQ_VERSION;
     79 	ar.ar_cmd = AGRCMD_ADDPORT;
     80 	ar.ar_buf = __UNCONST(val);
     81 	ar.ar_buflen = strlen(val);
     82 	ifr.ifr_data = (void *)&ar;
     83 
     84 	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
     85 		err(EXIT_FAILURE, "SIOCSETAGR");
     86 	}
     87 }
     88 
     89 void
     90 agrremport(const char *val, int d)
     91 {
     92 	struct agrreq ar;
     93 
     94 	assertifname(ifr.ifr_name);
     95 
     96 	memset(&ar, 0, sizeof(ar));
     97 	ar.ar_version = AGRREQ_VERSION;
     98 	ar.ar_cmd = AGRCMD_REMPORT;
     99 	ar.ar_buf = __UNCONST(val);
    100 	ar.ar_buflen = strlen(val);
    101 	ifr.ifr_data = (void *)&ar;
    102 
    103 	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
    104 		err(EXIT_FAILURE, "SIOCSETAGR");
    105 	}
    106 }
    107 
    108 void
    109 agr_status()
    110 {
    111 	struct agrreq ar;
    112 	void *buf = NULL;
    113 	size_t buflen = 0;
    114 	struct agrportlist *apl;
    115 	struct agrportinfo *api;
    116 	int i;
    117 
    118 	if (checkifname(ifr.ifr_name)) {
    119 		return;
    120 	}
    121 
    122 again:
    123 	memset(&ar, 0, sizeof(ar));
    124 	ar.ar_version = AGRREQ_VERSION;
    125 	ar.ar_cmd = AGRCMD_PORTLIST;
    126 	ar.ar_buf = buf;
    127 	ar.ar_buflen = buflen;
    128 	ifr.ifr_data = (void *)&ar;
    129 
    130 	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
    131 		if (errno != E2BIG) {
    132 			warn("SIOCGETAGR");
    133 			return;
    134 		}
    135 
    136 		free(buf);
    137 		buf = NULL;
    138 		buflen = 0;
    139 		goto again;
    140 	}
    141 
    142 	if (buf == NULL) {
    143 		buflen = ar.ar_buflen;
    144 		buf = malloc(buflen);
    145 		if (buf == NULL) {
    146 			err(EXIT_FAILURE, "agr_status");
    147 		}
    148 		goto again;
    149 	}
    150 
    151 	apl = buf;
    152 	api = (void *)(apl + 1);
    153 
    154 	for (i = 0; i < apl->apl_nports; i++) {
    155 		char tmp[256];
    156 
    157 		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
    158 		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
    159 		api++;
    160 	}
    161 }
    162