agr.c revision 1.6 
1/*	$NetBSD: agr.c,v 1.6 2008/05/06 17:29:04 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 1.6 2008/05/06 17:29:04 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
53static int checkifname(const char *);
54static void assertifname(const char *);
55
56static int
57checkifname(const char *ifname)
58{
59
60	return strncmp(ifname, "agr", 3) != 0 ||
61	    !isdigit((unsigned char)ifname[3]);
62}
63
64static void
65assertifname(const char *ifname)
66{
67
68	if (checkifname(ifname)) {
69		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
70	}
71}
72
73int
74agrsetport(prop_dictionary_t env, prop_dictionary_t xenv)
75{
76	char buf[IFNAMSIZ];
77	struct agrreq ar;
78	int s;
79	prop_string_t str;
80	prop_number_t num;
81	const char *ifname;
82	struct ifreq ifr;
83
84	if ((s = getsock(AF_UNSPEC)) == -1)
85		err(EXIT_FAILURE, "%s: getsock", __func__);
86
87	assertifname(ifr.ifr_name);
88
89	num = (prop_number_t)prop_dictionary_get(env, "agrcmd");
90	if (num == NULL) {
91		warnx("%s.%d", __func__, __LINE__);
92		errno = ENOENT;
93		return -1;
94	}
95
96	str = (prop_string_t)prop_dictionary_get(env, "agrport");
97	if (str == NULL) {
98		warnx("%s.%d", __func__, __LINE__);
99		errno = ENOENT;
100		return -1;
101	}
102	strlcpy(buf, prop_string_cstring_nocopy(str), sizeof(buf));
103
104	memset(&ifr, 0, sizeof(ifr));
105	if ((ifname = getifname(env)) == NULL)
106		err(EXIT_FAILURE, "%s: getifname", __func__);
107	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
108	memset(&ar, 0, sizeof(ar));
109	ar.ar_version = AGRREQ_VERSION;
110	ar.ar_cmd = (int)prop_number_integer_value(num);
111	ar.ar_buf = buf;
112	ar.ar_buflen = strlen(buf);
113	ifr.ifr_data = &ar;
114
115	if (ioctl(s, SIOCSETAGR, &ifr) == -1)
116		err(EXIT_FAILURE, "SIOCSETAGR");
117	return 0;
118}
119
120void
121agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
122{
123	struct agrreq ar;
124	void *buf = NULL;
125	size_t buflen = 0;
126	struct agrportlist *apl;
127	struct agrportinfo *api;
128	int i;
129	int s;
130	const char *ifname;
131	struct ifreq ifr;
132
133	if ((s = getsock(AF_UNSPEC)) == -1)
134		err(EXIT_FAILURE, "%s: getsock", __func__);
135
136	memset(&ifr, 0, sizeof(ifr));
137	if ((ifname = getifname(env)) == NULL)
138		err(EXIT_FAILURE, "%s: getifname", __func__);
139	if (checkifname(ifname))
140		return;
141	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
142
143again:
144	memset(&ar, 0, sizeof(ar));
145	ar.ar_version = AGRREQ_VERSION;
146	ar.ar_cmd = AGRCMD_PORTLIST;
147	ar.ar_buf = buf;
148	ar.ar_buflen = buflen;
149	ifr.ifr_data = &ar;
150
151	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
152		if (errno != E2BIG) {
153			warn("SIOCGETAGR");
154			return;
155		}
156
157		free(buf);
158		buf = NULL;
159		buflen = 0;
160		goto again;
161	}
162
163	if (buf == NULL) {
164		buflen = ar.ar_buflen;
165		buf = malloc(buflen);
166		if (buf == NULL) {
167			err(EXIT_FAILURE, "agr_status");
168		}
169		goto again;
170	}
171
172	apl = buf;
173	api = (void *)(apl + 1);
174
175	for (i = 0; i < apl->apl_nports; i++) {
176		char tmp[256];
177
178		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
179		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
180		api++;
181	}
182}
183