carp.c revision 203486 
1/*	$FreeBSD: head/sbin/ifconfig/ifcarp.c 203486 2010-02-04 11:43:22Z ru $ */
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	memset(carpr.carpr_key, 0, sizeof(carpr.carpr_key));
100	/* XXX Should hash the password into the key here, perhaps? */
101	strlcpy(carpr.carpr_key, val, CARP_KEY_LEN);
102
103	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
104		err(1, "SIOCSVH");
105
106	return;
107}
108
109void
110setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp)
111{
112	int vhid;
113	struct carpreq carpr;
114
115	vhid = atoi(val);
116
117	if (vhid <= 0)
118		errx(1, "vhid must be greater than 0");
119
120	memset((char *)&carpr, 0, sizeof(struct carpreq));
121	ifr.ifr_data = (caddr_t)&carpr;
122
123	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
124		err(1, "SIOCGVH");
125
126	carpr.carpr_vhid = vhid;
127
128	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
129		err(1, "SIOCSVH");
130
131	return;
132}
133
134void
135setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp)
136{
137	int advskew;
138	struct carpreq carpr;
139
140	advskew = atoi(val);
141
142	memset((char *)&carpr, 0, sizeof(struct carpreq));
143	ifr.ifr_data = (caddr_t)&carpr;
144
145	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
146		err(1, "SIOCGVH");
147
148	carpr.carpr_advskew = advskew;
149
150	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
151		err(1, "SIOCSVH");
152
153	return;
154}
155
156void
157setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp)
158{
159	int advbase;
160	struct carpreq carpr;
161
162	advbase = atoi(val);
163
164	memset((char *)&carpr, 0, sizeof(struct carpreq));
165	ifr.ifr_data = (caddr_t)&carpr;
166
167	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
168		err(1, "SIOCGVH");
169
170	carpr.carpr_advbase = advbase;
171
172	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
173		err(1, "SIOCSVH");
174
175	return;
176}
177
178static struct cmd carp_cmds[] = {
179	DEF_CMD_ARG("advbase",	setcarp_advbase),
180	DEF_CMD_ARG("advskew",	setcarp_advskew),
181	DEF_CMD_ARG("pass",	setcarp_passwd),
182	DEF_CMD_ARG("vhid",	setcarp_vhid),
183};
184static struct afswtch af_carp = {
185	.af_name	= "af_carp",
186	.af_af		= AF_UNSPEC,
187	.af_other_status = carp_status,
188};
189
190static __constructor void
191carp_ctor(void)
192{
193#define	N(a)	(sizeof(a) / sizeof(a[0]))
194	int i;
195
196	for (i = 0; i < N(carp_cmds);  i++)
197		cmd_register(&carp_cmds[i]);
198	af_register(&af_carp);
199#undef N
200}
201