agr.c revision 1.4 
1/*	$NetBSD: agr.c,v 1.4 2008/04/22 17:18:11 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 1.4 2008/04/22 17:18:11 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 <stdlib.h>
45#include <util.h>
46
47#include "extern.h"
48#include "agr.h"
49
50static int checkifname(const char *);
51static void assertifname(const char *);
52
53static int
54checkifname(const char *ifname)
55{
56
57	return strncmp(ifname, "agr", 3) != 0 ||
58	    !isdigit((unsigned char)ifname[3]);
59}
60
61static void
62assertifname(const char *ifname)
63{
64
65	if (checkifname(ifname)) {
66		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
67	}
68}
69
70void
71agraddport(const char *val, int d)
72{
73	char buf[IFNAMSIZ];
74	struct agrreq ar;
75
76	assertifname(ifr.ifr_name);
77
78	strlcpy(buf, val, sizeof(buf));
79
80	memset(&ar, 0, sizeof(ar));
81	ar.ar_version = AGRREQ_VERSION;
82	ar.ar_cmd = AGRCMD_ADDPORT;
83	ar.ar_buf = buf;
84	ar.ar_buflen = strlen(buf);
85	ifr.ifr_data = &ar;
86
87	if (ioctl(s, SIOCSETAGR, &ifr) == -1)
88		err(EXIT_FAILURE, "SIOCSETAGR");
89}
90
91void
92agrremport(const char *val, int d)
93{
94	char buf[IFNAMSIZ];
95	struct agrreq ar;
96
97	assertifname(ifr.ifr_name);
98
99	strlcpy(buf, val, sizeof(buf));
100
101	memset(&ar, 0, sizeof(ar));
102	ar.ar_version = AGRREQ_VERSION;
103	ar.ar_cmd = AGRCMD_REMPORT;
104	ar.ar_buf = buf;
105	ar.ar_buflen = strlen(buf);
106	ifr.ifr_data = &ar;
107
108	if (ioctl(s, SIOCSETAGR, &ifr) == -1)
109		err(EXIT_FAILURE, "SIOCSETAGR");
110}
111
112void
113agr_status()
114{
115	struct agrreq ar;
116	void *buf = NULL;
117	size_t buflen = 0;
118	struct agrportlist *apl;
119	struct agrportinfo *api;
120	int i;
121
122	if (checkifname(ifr.ifr_name)) {
123		return;
124	}
125
126again:
127	memset(&ar, 0, sizeof(ar));
128	ar.ar_version = AGRREQ_VERSION;
129	ar.ar_cmd = AGRCMD_PORTLIST;
130	ar.ar_buf = buf;
131	ar.ar_buflen = buflen;
132	ifr.ifr_data = (void *)&ar;
133
134	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
135		if (errno != E2BIG) {
136			warn("SIOCGETAGR");
137			return;
138		}
139
140		free(buf);
141		buf = NULL;
142		buflen = 0;
143		goto again;
144	}
145
146	if (buf == NULL) {
147		buflen = ar.ar_buflen;
148		buf = malloc(buflen);
149		if (buf == NULL) {
150			err(EXIT_FAILURE, "agr_status");
151		}
152		goto again;
153	}
154
155	apl = buf;
156	api = (void *)(apl + 1);
157
158	for (i = 0; i < apl->apl_nports; i++) {
159		char tmp[256];
160
161		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
162		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
163		api++;
164	}
165}
166