agr.c revision 1.11 
1/*	$NetBSD: agr.c,v 1.11 2008/05/09 20:45:09 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 1.11 2008/05/09 20:45:09 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 struct piface agrif = PIFACE_INITIALIZER(&agrif, "agr interface",
58    agrsetport, "agrport", &command_root.pb_parser);
59
60static const struct kwinst agrkw[] = {
61	  {.k_word = "agrport", .k_type = KW_T_NUM, .k_num = AGRCMD_ADDPORT,
62	   .k_nextparser = &agrif.pif_parser}
63	, {.k_word = "-agrport", .k_type = KW_T_NUM, .k_num = AGRCMD_REMPORT,
64	   .k_nextparser = &agrif.pif_parser}
65};
66
67struct pkw agr = PKW_INITIALIZER(&agr, "agr", NULL, "agrcmd",
68    agrkw, __arraycount(agrkw), NULL);
69
70static int
71checkifname(prop_dictionary_t env)
72{
73	const char *ifname;
74
75	if ((ifname = getifname(env)) == NULL)
76		return 1;
77
78	return strncmp(ifname, "agr", 3) != 0 ||
79	    !isdigit((unsigned char)ifname[3]);
80}
81
82static void
83assertifname(prop_dictionary_t env)
84{
85	if (checkifname(env))
86		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
87}
88
89int
90agrsetport(prop_dictionary_t env, prop_dictionary_t xenv)
91{
92	char buf[IFNAMSIZ];
93	struct agrreq ar;
94	const char *port;
95	int64_t cmd;
96
97	if (!prop_dictionary_get_int64(env, "agrcmd", &cmd)) {
98		warnx("%s.%d", __func__, __LINE__);
99		errno = ENOENT;
100		return -1;
101	}
102
103	if (!prop_dictionary_get_cstring_nocopy(env, "agrport", &port)) {
104		warnx("%s.%d", __func__, __LINE__);
105		errno = ENOENT;
106		return -1;
107	}
108	strlcpy(buf, port, sizeof(buf));
109
110	assertifname(env);
111	memset(&ar, 0, sizeof(ar));
112	ar.ar_version = AGRREQ_VERSION;
113	ar.ar_cmd = cmd;
114	ar.ar_buf = buf;
115	ar.ar_buflen = strlen(buf);
116
117	if (indirect_ioctl(env, SIOCSETAGR, &ar) == -1)
118		err(EXIT_FAILURE, "SIOCSETAGR");
119	return 0;
120}
121
122void
123agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
124{
125	struct agrreq ar;
126	void *buf = NULL;
127	size_t buflen = 0;
128	struct agrportlist *apl;
129	struct agrportinfo *api;
130	int i;
131
132	if (checkifname(env))
133		return;
134
135again:
136	memset(&ar, 0, sizeof(ar));
137	ar.ar_version = AGRREQ_VERSION;
138	ar.ar_cmd = AGRCMD_PORTLIST;
139	ar.ar_buf = buf;
140	ar.ar_buflen = buflen;
141
142	if (indirect_ioctl(env, SIOCGETAGR, &ar) == -1) {
143		if (errno != E2BIG) {
144			warn("SIOCGETAGR");
145			return;
146		}
147
148		free(buf);
149		buf = NULL;
150		buflen = 0;
151		goto again;
152	}
153
154	if (buf == NULL) {
155		buflen = ar.ar_buflen;
156		buf = malloc(buflen);
157		if (buf == NULL) {
158			err(EXIT_FAILURE, "agr_status");
159		}
160		goto again;
161	}
162
163	apl = buf;
164	api = (void *)(apl + 1);
165
166	for (i = 0; i < apl->apl_nports; i++) {
167		char tmp[256];
168
169		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
170		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
171		api++;
172	}
173}
174