agr.c revision 1.3 
1/*	$NetBSD: agr.c,v 1.3 2005/03/19 17:31:48 thorpej 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 1.3 2005/03/19 17:31:48 thorpej 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 "extern.h"
48#include "agr.h"
49
50static int checkifname(const char *);
51static void assertifname(const char *);
52
53static int
54checkifname(const char *ifname)
55{
56
57	return strncmp(ifname, "agr", 3) != 0 ||
58	    !isdigit((unsigned char)ifname[3]);
59}
60
61static void
62assertifname(const char *ifname)
63{
64
65	if (checkifname(ifname)) {
66		errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
67	}
68}
69
70void
71agraddport(const char *val, int d)
72{
73	struct agrreq ar;
74
75	assertifname(ifr.ifr_name);
76
77	memset(&ar, 0, sizeof(ar));
78	ar.ar_version = AGRREQ_VERSION;
79	ar.ar_cmd = AGRCMD_ADDPORT;
80	ar.ar_buf = __UNCONST(val);
81	ar.ar_buflen = strlen(val);
82	ifr.ifr_data = (void *)&ar;
83
84	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
85		err(EXIT_FAILURE, "SIOCSETAGR");
86	}
87}
88
89void
90agrremport(const char *val, int d)
91{
92	struct agrreq ar;
93
94	assertifname(ifr.ifr_name);
95
96	memset(&ar, 0, sizeof(ar));
97	ar.ar_version = AGRREQ_VERSION;
98	ar.ar_cmd = AGRCMD_REMPORT;
99	ar.ar_buf = __UNCONST(val);
100	ar.ar_buflen = strlen(val);
101	ifr.ifr_data = (void *)&ar;
102
103	if (ioctl(s, SIOCSETAGR, &ifr) == -1) {
104		err(EXIT_FAILURE, "SIOCSETAGR");
105	}
106}
107
108void
109agr_status()
110{
111	struct agrreq ar;
112	void *buf = NULL;
113	size_t buflen = 0;
114	struct agrportlist *apl;
115	struct agrportinfo *api;
116	int i;
117
118	if (checkifname(ifr.ifr_name)) {
119		return;
120	}
121
122again:
123	memset(&ar, 0, sizeof(ar));
124	ar.ar_version = AGRREQ_VERSION;
125	ar.ar_cmd = AGRCMD_PORTLIST;
126	ar.ar_buf = buf;
127	ar.ar_buflen = buflen;
128	ifr.ifr_data = (void *)&ar;
129
130	if (ioctl(s, SIOCGETAGR, &ifr) == -1) {
131		if (errno != E2BIG) {
132			warn("SIOCGETAGR");
133			return;
134		}
135
136		free(buf);
137		buf = NULL;
138		buflen = 0;
139		goto again;
140	}
141
142	if (buf == NULL) {
143		buflen = ar.ar_buflen;
144		buf = malloc(buflen);
145		if (buf == NULL) {
146			err(EXIT_FAILURE, "agr_status");
147		}
148		goto again;
149	}
150
151	apl = buf;
152	api = (void *)(apl + 1);
153
154	for (i = 0; i < apl->apl_nports; i++) {
155		char tmp[256];
156
157		snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
158		printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
159		api++;
160	}
161}
162