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agr.c revision 1.1 
      1 /*	$NetBSD: agr.c,v 1.1 2005/03/18 11:11:51 yamt 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 1.1 2005/03/18 11:11:51 yamt 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 "agr.h"
     48 
     49 extern struct ifreq ifr;
     50 extern int s;
     51 
     52 static int checkifname(const char *);
     53 static void assertifname(const char *);
     54 
     55 static int
     56 checkifname(const char *name)
     57 {
     58 
     59 	return strncmp(name, "agr", 3) != 0 ||
     60 	    !isdigit((unsigned char)name[3]);
     61 }
     62 
     63 static void
     64 assertifname(const char *name)
     65 {
     66 
     67 	if (checkifname(name)) {
     68 		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
     69 	}
     70 }
     71 
     72 void
     73 agraddport(const char *val, int d)
     74 {
     75 	struct agrreq ar;
     76 
     77 	assertifname(ifr.ifr_name);
     78 
     79 	memset(&ar, 0, sizeof(ar));
     80 	ar.ar_version = AGRREQ_VERSION;
     81 	ar.ar_cmd = AGRCMD_ADDPORT;
     82 	ar.ar_buf = __UNCONST(val);
     83 	ar.ar_buflen = strlen(val);
     84 	ifr.ifr_data = (void *)&ar;
     85 
     86 	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
     87 		err(EXIT_FAILURE, "SIOCSETAGR");
     88 	}
     89 }
     90 
     91 void
     92 agrremport(const char *val, int d)
     93 {
     94 	struct agrreq ar;
     95 
     96 	assertifname(ifr.ifr_name);
     97 
     98 	memset(&ar, 0, sizeof(ar));
     99 	ar.ar_version = AGRREQ_VERSION;
    100 	ar.ar_cmd = AGRCMD_REMPORT;
    101 	ar.ar_buf = __UNCONST(val);
    102 	ar.ar_buflen = strlen(val);
    103 	ifr.ifr_data = (void *)&ar;
    104 
    105 	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
    106 		err(EXIT_FAILURE, "SIOCSETAGR");
    107 	}
    108 }
    109 
    110 void
    111 agr_status()
    112 {
    113 	struct agrreq ar;
    114 	void *buf = NULL;
    115 	size_t buflen = 0;
    116 	struct agrportlist *apl;
    117 	struct agrportinfo *api;
    118 	int i;
    119 
    120 	if (checkifname(ifr.ifr_name)) {
    121 		return;
    122 	}
    123 
    124 again:
    125 	memset(&ar, 0, sizeof(ar));
    126 	ar.ar_version = AGRREQ_VERSION;
    127 	ar.ar_cmd = AGRCMD_PORTLIST;
    128 	ar.ar_buf = buf;
    129 	ar.ar_buflen = buflen;
    130 	ifr.ifr_data = (void *)&ar;
    131 
    132 	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
    133 		if (errno != E2BIG) {
    134 			warn("SIOCGETAGR");
    135 			return;
    136 		}
    137 
    138 		free(buf);
    139 		buf = NULL;
    140 		buflen = 0;
    141 		goto again;
    142 	}
    143 
    144 	if (buf == NULL) {
    145 		buflen = ar.ar_buflen;
    146 		buf = malloc(buflen);
    147 		if (buf == NULL) {
    148 			err(EXIT_FAILURE, "agr_status");
    149 		}
    150 		goto again;
    151 	}
    152 
    153 	apl = buf;
    154 	api = (void *)(apl + 1);
    155 
    156 	for (i = 0; i < apl->apl_nports; i++) {
    157 		char tmp[256];
    158 
    159 		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
    160 		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
    161 		api++;
    162 	}
    163 }
    164