1/*	$FreeBSD$ */
2/*	from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */
3
4/*-
5 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
6 *
7 * Copyright (c) 2002 Michael Shalayeff. All rights reserved.
8 * Copyright (c) 2003 Ryan McBride. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
28 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
29 * THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/param.h>
33#include <sys/ioctl.h>
34#include <sys/socket.h>
35#include <sys/sockio.h>
36
37#include <stdlib.h>
38#include <unistd.h>
39
40#include <net/if.h>
41#include <netinet/in.h>
42#include <netinet/in_var.h>
43#include <netinet/ip_carp.h>
44
45#include <ctype.h>
46#include <stdio.h>
47#include <string.h>
48#include <stdlib.h>
49#include <unistd.h>
50#include <err.h>
51#include <errno.h>
52
53#include "ifconfig.h"
54
55static const char *carp_states[] = { CARP_STATES };
56
57static void carp_status(int s);
58static void setcarp_vhid(const char *, int, int, const struct afswtch *rafp);
59static void setcarp_callback(int, void *);
60static void setcarp_advbase(const char *,int, int, const struct afswtch *rafp);
61static void setcarp_advskew(const char *, int, int, const struct afswtch *rafp);
62static void setcarp_passwd(const char *, int, int, const struct afswtch *rafp);
63
64static int carpr_vhid = -1;
65static int carpr_advskew = -1;
66static int carpr_advbase = -1;
67static int carpr_state = -1;
68static unsigned char const *carpr_key;
69
70static void
71carp_status(int s)
72{
73	struct carpreq carpr[CARP_MAXVHID];
74	int i;
75
76	bzero(carpr, sizeof(struct carpreq) * CARP_MAXVHID);
77	carpr[0].carpr_count = CARP_MAXVHID;
78	ifr.ifr_data = (caddr_t)&carpr;
79
80	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
81		return;
82
83	for (i = 0; i < carpr[0].carpr_count; i++) {
84		printf("\tcarp: %s vhid %d advbase %d advskew %d",
85		    carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid,
86		    carpr[i].carpr_advbase, carpr[i].carpr_advskew);
87		if (printkeys && carpr[i].carpr_key[0] != '\0')
88			printf(" key \"%s\"\n", carpr[i].carpr_key);
89		else
90			printf("\n");
91	}
92}
93
94static void
95setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp)
96{
97
98	carpr_vhid = atoi(val);
99
100	if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID)
101		errx(1, "vhid must be greater than 0 and less than %u",
102		    CARP_MAXVHID);
103
104	switch (afp->af_af) {
105#ifdef INET
106	case AF_INET:
107	    {
108		struct in_aliasreq *ifra;
109
110		ifra = (struct in_aliasreq *)afp->af_addreq;
111		ifra->ifra_vhid = carpr_vhid;
112		break;
113	    }
114#endif
115#ifdef INET6
116	case AF_INET6:
117	    {
118		struct in6_aliasreq *ifra;
119
120		ifra = (struct in6_aliasreq *)afp->af_addreq;
121		ifra->ifra_vhid = carpr_vhid;
122		break;
123	    }
124#endif
125	default:
126		errx(1, "%s doesn't support carp(4)", afp->af_name);
127	}
128
129	callback_register(setcarp_callback, NULL);
130}
131
132static void
133setcarp_callback(int s, void *arg __unused)
134{
135	struct carpreq carpr;
136
137	bzero(&carpr, sizeof(struct carpreq));
138	carpr.carpr_vhid = carpr_vhid;
139	carpr.carpr_count = 1;
140	ifr.ifr_data = (caddr_t)&carpr;
141
142	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1 && errno != ENOENT)
143		err(1, "SIOCGVH");
144
145	if (carpr_key != NULL)
146		/* XXX Should hash the password into the key here? */
147		strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN);
148	if (carpr_advskew > -1)
149		carpr.carpr_advskew = carpr_advskew;
150	if (carpr_advbase > -1)
151		carpr.carpr_advbase = carpr_advbase;
152	if (carpr_state > -1)
153		carpr.carpr_state = carpr_state;
154
155	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
156		err(1, "SIOCSVH");
157}
158
159static void
160setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp)
161{
162
163	if (carpr_vhid == -1)
164		errx(1, "passwd requires vhid");
165
166	carpr_key = val;
167}
168
169static void
170setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp)
171{
172
173	if (carpr_vhid == -1)
174		errx(1, "advskew requires vhid");
175
176	carpr_advskew = atoi(val);
177}
178
179static void
180setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp)
181{
182
183	if (carpr_vhid == -1)
184		errx(1, "advbase requires vhid");
185
186	carpr_advbase = atoi(val);
187}
188
189static void
190setcarp_state(const char *val, int d, int s, const struct afswtch *afp)
191{
192	int i;
193
194	if (carpr_vhid == -1)
195		errx(1, "state requires vhid");
196
197	for (i = 0; i <= CARP_MAXSTATE; i++)
198		if (strcasecmp(carp_states[i], val) == 0) {
199			carpr_state = i;
200			return;
201		}
202
203	errx(1, "unknown state");
204}
205
206static struct cmd carp_cmds[] = {
207	DEF_CMD_ARG("advbase",	setcarp_advbase),
208	DEF_CMD_ARG("advskew",	setcarp_advskew),
209	DEF_CMD_ARG("pass",	setcarp_passwd),
210	DEF_CMD_ARG("vhid",	setcarp_vhid),
211	DEF_CMD_ARG("state",	setcarp_state),
212};
213static struct afswtch af_carp = {
214	.af_name	= "af_carp",
215	.af_af		= AF_UNSPEC,
216	.af_other_status = carp_status,
217};
218
219static __constructor void
220carp_ctor(void)
221{
222	int i;
223
224	for (i = 0; i < nitems(carp_cmds);  i++)
225		cmd_register(&carp_cmds[i]);
226	af_register(&af_carp);
227}
228