agr.c revision 1.10 
1/*	$NetBSD: agr.c,v 1.10 2008/05/07 23:55:06 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 1.10 2008/05/07 23:55:06 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
54static int checkifname(prop_dictionary_t);
55static void assertifname(prop_dictionary_t);
56
57static const struct kwinst agrkw[] = {
58	  {.k_word = "agrport", .k_type = KW_T_NUM, .k_neg = true,
59	   .k_num = AGRCMD_ADDPORT, .k_negnum = AGRCMD_REMPORT,
60	   .k_exec = agrsetport}
61};
62
63struct pkw agr = PKW_INITIALIZER(&agr, "agr", NULL, NULL,
64    agrkw, __arraycount(agrkw), NULL);
65
66static int
67checkifname(prop_dictionary_t env)
68{
69	const char *ifname;
70
71	if ((ifname = getifname(env)) == NULL)
72		return 1;
73
74	return strncmp(ifname, "agr", 3) != 0 ||
75	    !isdigit((unsigned char)ifname[3]);
76}
77
78static void
79assertifname(prop_dictionary_t env)
80{
81	if (checkifname(env))
82		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
83}
84
85int
86agrsetport(prop_dictionary_t env, prop_dictionary_t xenv)
87{
88	char buf[IFNAMSIZ];
89	struct agrreq ar;
90	const char *port;
91	int64_t cmd;
92
93	if (!prop_dictionary_get_int64(env, "agrcmd", &cmd)) {
94		warnx("%s.%d", __func__, __LINE__);
95		errno = ENOENT;
96		return -1;
97	}
98
99	if (!prop_dictionary_get_cstring_nocopy(env, "agrport", &port)) {
100		warnx("%s.%d", __func__, __LINE__);
101		errno = ENOENT;
102		return -1;
103	}
104	strlcpy(buf, port, sizeof(buf));
105
106	assertifname(env);
107	memset(&ar, 0, sizeof(ar));
108	ar.ar_version = AGRREQ_VERSION;
109	ar.ar_cmd = cmd;
110	ar.ar_buf = buf;
111	ar.ar_buflen = strlen(buf);
112
113	if (indirect_ioctl(env, SIOCSETAGR, &ar) == -1)
114		err(EXIT_FAILURE, "SIOCSETAGR");
115	return 0;
116}
117
118void
119agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
120{
121	struct agrreq ar;
122	void *buf = NULL;
123	size_t buflen = 0;
124	struct agrportlist *apl;
125	struct agrportinfo *api;
126	int i;
127
128	if (checkifname(env))
129		return;
130
131again:
132	memset(&ar, 0, sizeof(ar));
133	ar.ar_version = AGRREQ_VERSION;
134	ar.ar_cmd = AGRCMD_PORTLIST;
135	ar.ar_buf = buf;
136	ar.ar_buflen = buflen;
137
138	if (indirect_ioctl(env, SIOCGETAGR, &ar) == -1) {
139		if (errno != E2BIG) {
140			warn("SIOCGETAGR");
141			return;
142		}
143
144		free(buf);
145		buf = NULL;
146		buflen = 0;
147		goto again;
148	}
149
150	if (buf == NULL) {
151		buflen = ar.ar_buflen;
152		buf = malloc(buflen);
153		if (buf == NULL) {
154			err(EXIT_FAILURE, "agr_status");
155		}
156		goto again;
157	}
158
159	apl = buf;
160	api = (void *)(apl + 1);
161
162	for (i = 0; i < apl->apl_nports; i++) {
163		char tmp[256];
164
165		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
166		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
167		api++;
168	}
169}
170