agr.c revision 1.1 
1/*	$NetBSD: agr.c,v 1.1 2005/03/18 11:11:51 yamt 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 1.1 2005/03/18 11:11:51 yamt 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 "agr.h"
48
49extern struct ifreq ifr;
50extern int s;
51
52static int checkifname(const char *);
53static void assertifname(const char *);
54
55static int
56checkifname(const char *name)
57{
58
59	return strncmp(name, "agr", 3) != 0 ||
60	    !isdigit((unsigned char)name[3]);
61}
62
63static void
64assertifname(const char *name)
65{
66
67	if (checkifname(name)) {
68		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
69	}
70}
71
72void
73agraddport(const char *val, int d)
74{
75	struct agrreq ar;
76
77	assertifname(ifr.ifr_name);
78
79	memset(&ar, 0, sizeof(ar));
80	ar.ar_version = AGRREQ_VERSION;
81	ar.ar_cmd = AGRCMD_ADDPORT;
82	ar.ar_buf = __UNCONST(val);
83	ar.ar_buflen = strlen(val);
84	ifr.ifr_data = (void *)&ar;
85
86	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
87		err(EXIT_FAILURE, "SIOCSETAGR");
88	}
89}
90
91void
92agrremport(const char *val, int d)
93{
94	struct agrreq ar;
95
96	assertifname(ifr.ifr_name);
97
98	memset(&ar, 0, sizeof(ar));
99	ar.ar_version = AGRREQ_VERSION;
100	ar.ar_cmd = AGRCMD_REMPORT;
101	ar.ar_buf = __UNCONST(val);
102	ar.ar_buflen = strlen(val);
103	ifr.ifr_data = (void *)&ar;
104
105	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
106		err(EXIT_FAILURE, "SIOCSETAGR");
107	}
108}
109
110void
111agr_status()
112{
113	struct agrreq ar;
114	void *buf = NULL;
115	size_t buflen = 0;
116	struct agrportlist *apl;
117	struct agrportinfo *api;
118	int i;
119
120	if (checkifname(ifr.ifr_name)) {
121		return;
122	}
123
124again:
125	memset(&ar, 0, sizeof(ar));
126	ar.ar_version = AGRREQ_VERSION;
127	ar.ar_cmd = AGRCMD_PORTLIST;
128	ar.ar_buf = buf;
129	ar.ar_buflen = buflen;
130	ifr.ifr_data = (void *)&ar;
131
132	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
133		if (errno != E2BIG) {
134			warn("SIOCGETAGR");
135			return;
136		}
137
138		free(buf);
139		buf = NULL;
140		buflen = 0;
141		goto again;
142	}
143
144	if (buf == NULL) {
145		buflen = ar.ar_buflen;
146		buf = malloc(buflen);
147		if (buf == NULL) {
148			err(EXIT_FAILURE, "agr_status");
149		}
150		goto again;
151	}
152
153	apl = buf;
154	api = (void *)(apl + 1);
155
156	for (i = 0; i < apl->apl_nports; i++) {
157		char tmp[256];
158
159		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
160		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
161		api++;
162	}
163}
164