agr.c revision 1.9 
1/*	$NetBSD: agr.c,v 1.9 2008/05/07 19:55:24 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 1.9 2008/05/07 19:55:24 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 const struct kwinst agrkw[] = {
57	  {.k_word = "agrport", .k_type = KW_T_NUM, .k_neg = true,
58	   .k_num = AGRCMD_ADDPORT, .k_negnum = AGRCMD_REMPORT,
59	   .k_exec = agrsetport}
60};
61
62struct pkw agr = PKW_INITIALIZER(&agr, "agr", NULL, NULL,
63    agrkw, __arraycount(agrkw), NULL);
64
65static int
66checkifname(const char *ifname)
67{
68
69	return strncmp(ifname, "agr", 3) != 0 ||
70	    !isdigit((unsigned char)ifname[3]);
71}
72
73static void
74assertifname(const char *ifname)
75{
76
77	if (checkifname(ifname)) {
78		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
79	}
80}
81
82int
83agrsetport(prop_dictionary_t env, prop_dictionary_t xenv)
84{
85	char buf[IFNAMSIZ];
86	struct agrreq ar;
87	int s;
88	const char *port;
89	const char *ifname;
90	struct ifreq ifr;
91	int64_t cmd;
92
93	if ((s = getsock(AF_UNSPEC)) == -1)
94		err(EXIT_FAILURE, "%s: getsock", __func__);
95
96	if (!prop_dictionary_get_int64(env, "agrcmd", &cmd)) {
97		warnx("%s.%d", __func__, __LINE__);
98		errno = ENOENT;
99		return -1;
100	}
101
102	if (!prop_dictionary_get_cstring_nocopy(env, "agrport", &port)) {
103		warnx("%s.%d", __func__, __LINE__);
104		errno = ENOENT;
105		return -1;
106	}
107	strlcpy(buf, port, sizeof(buf));
108
109	memset(&ifr, 0, sizeof(ifr));
110	if ((ifname = getifname(env)) == NULL)
111		err(EXIT_FAILURE, "%s: getifname", __func__);
112	assertifname(ifname);
113	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
114	memset(&ar, 0, sizeof(ar));
115	ar.ar_version = AGRREQ_VERSION;
116	ar.ar_cmd = cmd;
117	ar.ar_buf = buf;
118	ar.ar_buflen = strlen(buf);
119	ifr.ifr_data = &ar;
120
121	if (ioctl(s, SIOCSETAGR, &ifr) == -1)
122		err(EXIT_FAILURE, "SIOCSETAGR");
123	return 0;
124}
125
126void
127agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
128{
129	struct agrreq ar;
130	void *buf = NULL;
131	size_t buflen = 0;
132	struct agrportlist *apl;
133	struct agrportinfo *api;
134	int i;
135	int s;
136	const char *ifname;
137	struct ifreq ifr;
138
139	if ((s = getsock(AF_UNSPEC)) == -1)
140		err(EXIT_FAILURE, "%s: getsock", __func__);
141
142	memset(&ifr, 0, sizeof(ifr));
143	if ((ifname = getifname(env)) == NULL)
144		err(EXIT_FAILURE, "%s: getifname", __func__);
145	if (checkifname(ifname))
146		return;
147	estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
148
149again:
150	memset(&ar, 0, sizeof(ar));
151	ar.ar_version = AGRREQ_VERSION;
152	ar.ar_cmd = AGRCMD_PORTLIST;
153	ar.ar_buf = buf;
154	ar.ar_buflen = buflen;
155	ifr.ifr_data = &ar;
156
157	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
158		if (errno != E2BIG) {
159			warn("SIOCGETAGR");
160			return;
161		}
162
163		free(buf);
164		buf = NULL;
165		buflen = 0;
166		goto again;
167	}
168
169	if (buf == NULL) {
170		buflen = ar.ar_buflen;
171		buf = malloc(buflen);
172		if (buf == NULL) {
173			err(EXIT_FAILURE, "agr_status");
174		}
175		goto again;
176	}
177
178	apl = buf;
179	api = (void *)(apl + 1);
180
181	for (i = 0; i < apl->apl_nports; i++) {
182		char tmp[256];
183
184		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
185		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
186		api++;
187	}
188}
189