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