carp.c revision 142224 
1/*	$FreeBSD: head/sbin/ifconfig/ifcarp.c 142224 2005-02-22 14:07:47Z glebius $ */
2/*	from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */
3
4/*
5 * Copyright (c) 2002 Michael Shalayeff. All rights reserved.
6 * Copyright (c) 2003 Ryan McBride. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/param.h>
31#include <sys/ioctl.h>
32#include <sys/socket.h>
33#include <sys/sockio.h>
34
35#include <stdlib.h>
36#include <unistd.h>
37
38#include <net/ethernet.h>
39#include <net/if.h>
40#include <netinet/ip_carp.h>
41#include <net/route.h>
42
43#include <ctype.h>
44#include <stdio.h>
45#include <string.h>
46#include <stdlib.h>
47#include <unistd.h>
48#include <err.h>
49#include <errno.h>
50
51#include "ifconfig.h"
52
53static const char *carp_states[] = { CARP_STATES };
54
55void carp_status(int s);
56void setcarp_advbase(const char *,int, int, const struct afswtch *rafp);
57void setcarp_advskew(const char *, int, int, const struct afswtch *rafp);
58void setcarp_passwd(const char *, int, int, const struct afswtch *rafp);
59void setcarp_vhid(const char *, int, int, const struct afswtch *rafp);
60
61void
62carp_status(int s)
63{
64	const char *state;
65	struct carpreq carpr;
66
67	memset((char *)&carpr, 0, sizeof(struct carpreq));
68	ifr.ifr_data = (caddr_t)&carpr;
69
70	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
71		return;
72
73	if (carpr.carpr_vhid > 0) {
74		if (carpr.carpr_state > CARP_MAXSTATE)
75			state = "<UNKNOWN>";
76		else
77			state = carp_states[carpr.carpr_state];
78
79		printf("\tcarp: %s vhid %d advbase %d advskew %d\n",
80		    state, carpr.carpr_vhid, carpr.carpr_advbase,
81		    carpr.carpr_advskew);
82	}
83
84	return;
85
86}
87
88void
89setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp)
90{
91	struct carpreq carpr;
92
93	memset((char *)&carpr, 0, sizeof(struct carpreq));
94	ifr.ifr_data = (caddr_t)&carpr;
95
96	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
97		err(1, "SIOCGVH");
98
99	/* XXX Should hash the password into the key here, perhaps? */
100	strlcpy(carpr.carpr_key, val, CARP_KEY_LEN);
101
102	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
103		err(1, "SIOCSVH");
104
105	return;
106}
107
108void
109setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp)
110{
111	int vhid;
112	struct carpreq carpr;
113
114	vhid = atoi(val);
115
116	if (vhid <= 0)
117		errx(1, "vhid must be greater than 0");
118
119	memset((char *)&carpr, 0, sizeof(struct carpreq));
120	ifr.ifr_data = (caddr_t)&carpr;
121
122	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
123		err(1, "SIOCGVH");
124
125	carpr.carpr_vhid = vhid;
126
127	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
128		err(1, "SIOCSVH");
129
130	return;
131}
132
133void
134setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp)
135{
136	int advskew;
137	struct carpreq carpr;
138
139	advskew = atoi(val);
140
141	memset((char *)&carpr, 0, sizeof(struct carpreq));
142	ifr.ifr_data = (caddr_t)&carpr;
143
144	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
145		err(1, "SIOCGVH");
146
147	carpr.carpr_advskew = advskew;
148
149	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
150		err(1, "SIOCSVH");
151
152	return;
153}
154
155void
156setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp)
157{
158	int advbase;
159	struct carpreq carpr;
160
161	advbase = atoi(val);
162
163	memset((char *)&carpr, 0, sizeof(struct carpreq));
164	ifr.ifr_data = (caddr_t)&carpr;
165
166	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
167		err(1, "SIOCGVH");
168
169	carpr.carpr_advbase = advbase;
170
171	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
172		err(1, "SIOCSVH");
173
174	return;
175}
176
177static struct cmd carp_cmds[] = {
178	DEF_CMD_ARG("advbase",	setcarp_advbase),
179	DEF_CMD_ARG("advskew",	setcarp_advskew),
180	DEF_CMD_ARG("pass",	setcarp_passwd),
181	DEF_CMD_ARG("vhid",	setcarp_vhid),
182};
183static struct afswtch af_carp = {
184	.af_name	= "af_carp",
185	.af_af		= AF_UNSPEC,
186	.af_other_status = carp_status,
187};
188
189static __constructor void
190carp_ctor(void)
191{
192#define	N(a)	(sizeof(a) / sizeof(a[0]))
193	int i;
194
195	for (i = 0; i < N(carp_cmds);  i++)
196		cmd_register(&carp_cmds[i]);
197	af_register(&af_carp);
198#undef N
199}
200