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 #ifdef FSTACK
46 #include <netinet6/in6_var.h>
47 #endif
48
49 #include <ctype.h>
50 #include <stdio.h>
51 #include <string.h>
52 #include <stdlib.h>
53 #include <unistd.h>
54 #include <err.h>
55 #include <errno.h>
56
57 #include "ifconfig.h"
58
59 static const char *carp_states[] = { CARP_STATES };
60
61 static void carp_status(int s);
62 static void setcarp_vhid(const char *, int, int, const struct afswtch *rafp);
63 static void setcarp_callback(int, void *);
64 static void setcarp_advbase(const char *,int, int, const struct afswtch *rafp);
65 static void setcarp_advskew(const char *, int, int, const struct afswtch *rafp);
66 static void setcarp_passwd(const char *, int, int, const struct afswtch *rafp);
67
68 static int carpr_vhid = -1;
69 static int carpr_advskew = -1;
70 static int carpr_advbase = -1;
71 static int carpr_state = -1;
72 static unsigned char const *carpr_key;
73
74 static void
carp_status(int s)75 carp_status(int s)
76 {
77 struct carpreq carpr[CARP_MAXVHID];
78 int i;
79
80 bzero(carpr, sizeof(struct carpreq) * CARP_MAXVHID);
81 carpr[0].carpr_count = CARP_MAXVHID;
82 ifr.ifr_data = (caddr_t)&carpr;
83
84 #ifndef FSTACK
85 if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
86 #else
87 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
88 size_t clen = sizeof(struct carpreq) * CARP_MAXVHID;
89 if (ioctl_va(s, SIOCGVH, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1)
90 #endif
91 return;
92
93 for (i = 0; i < carpr[0].carpr_count; i++) {
94 printf("\tcarp: %s vhid %d advbase %d advskew %d",
95 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid,
96 carpr[i].carpr_advbase, carpr[i].carpr_advskew);
97 if (printkeys && carpr[i].carpr_key[0] != '\0')
98 printf(" key \"%s\"\n", carpr[i].carpr_key);
99 else
100 printf("\n");
101 }
102 }
103
104 static void
setcarp_vhid(const char * val,int d,int s,const struct afswtch * afp)105 setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp)
106 {
107
108 carpr_vhid = atoi(val);
109
110 if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID)
111 errx(1, "vhid must be greater than 0 and less than %u",
112 CARP_MAXVHID);
113
114 switch (afp->af_af) {
115 #ifdef INET
116 case AF_INET:
117 {
118 struct in_aliasreq *ifra;
119
120 ifra = (struct in_aliasreq *)afp->af_addreq;
121 ifra->ifra_vhid = carpr_vhid;
122 break;
123 }
124 #endif
125 #ifdef INET6
126 case AF_INET6:
127 {
128 struct in6_aliasreq *ifra;
129
130 ifra = (struct in6_aliasreq *)afp->af_addreq;
131 ifra->ifra_vhid = carpr_vhid;
132 break;
133 }
134 #endif
135 default:
136 errx(1, "%s doesn't support carp(4)", afp->af_name);
137 }
138
139 callback_register(setcarp_callback, NULL);
140 }
141
142 static void
setcarp_callback(int s,void * arg __unused)143 setcarp_callback(int s, void *arg __unused)
144 {
145 struct carpreq carpr;
146
147 bzero(&carpr, sizeof(struct carpreq));
148 carpr.carpr_vhid = carpr_vhid;
149 carpr.carpr_count = 1;
150 ifr.ifr_data = (caddr_t)&carpr;
151
152 #ifndef FSTACK
153 if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1 && errno != ENOENT)
154 #else
155 size_t offset, clen;
156 offset = (char *)&(ifr.ifr_data) - (char *)&(ifr);
157 clen = sizeof(carpr);
158 if (ioctl_va(s, SIOCGVH, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1
159 && errno != ENOENT)
160 #endif
161 err(1, "SIOCGVH");
162
163 if (carpr_key != NULL)
164 /* XXX Should hash the password into the key here? */
165 #ifndef FSTACK
166 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN);
167 #else
168 strlcpy((char *)carpr.carpr_key, (const char *)carpr_key, CARP_KEY_LEN);
169 #endif
170 if (carpr_advskew > -1)
171 carpr.carpr_advskew = carpr_advskew;
172 if (carpr_advbase > -1)
173 carpr.carpr_advbase = carpr_advbase;
174 if (carpr_state > -1)
175 carpr.carpr_state = carpr_state;
176
177 #ifndef FSTACK
178 if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
179 #else
180 if (ioctl_va(s, SIOCSVH, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1)
181 #endif
182 err(1, "SIOCSVH");
183 }
184
185 static void
setcarp_passwd(const char * val,int d,int s,const struct afswtch * afp)186 setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp)
187 {
188
189 if (carpr_vhid == -1)
190 errx(1, "passwd requires vhid");
191
192 #ifndef FSTACK
193 carpr_key = val;
194 #else
195 carpr_key = (const unsigned char *)val;
196 #endif
197 }
198
199 static void
setcarp_advskew(const char * val,int d,int s,const struct afswtch * afp)200 setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp)
201 {
202
203 if (carpr_vhid == -1)
204 errx(1, "advskew requires vhid");
205
206 carpr_advskew = atoi(val);
207 }
208
209 static void
setcarp_advbase(const char * val,int d,int s,const struct afswtch * afp)210 setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp)
211 {
212
213 if (carpr_vhid == -1)
214 errx(1, "advbase requires vhid");
215
216 carpr_advbase = atoi(val);
217 }
218
219 static void
setcarp_state(const char * val,int d,int s,const struct afswtch * afp)220 setcarp_state(const char *val, int d, int s, const struct afswtch *afp)
221 {
222 int i;
223
224 if (carpr_vhid == -1)
225 errx(1, "state requires vhid");
226
227 for (i = 0; i <= CARP_MAXSTATE; i++)
228 if (strcasecmp(carp_states[i], val) == 0) {
229 carpr_state = i;
230 return;
231 }
232
233 errx(1, "unknown state");
234 }
235
236 static struct cmd carp_cmds[] = {
237 DEF_CMD_ARG("advbase", setcarp_advbase),
238 DEF_CMD_ARG("advskew", setcarp_advskew),
239 DEF_CMD_ARG("pass", setcarp_passwd),
240 DEF_CMD_ARG("vhid", setcarp_vhid),
241 DEF_CMD_ARG("state", setcarp_state),
242 };
243 static struct afswtch af_carp = {
244 .af_name = "af_carp",
245 .af_af = AF_UNSPEC,
246 .af_other_status = carp_status,
247 };
248
249 static __constructor void
carp_ctor(void)250 carp_ctor(void)
251 {
252 int i;
253
254 for (i = 0; i < nitems(carp_cmds); i++)
255 cmd_register(&carp_cmds[i]);
256 af_register(&af_carp);
257 }
258