1 /* from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2002 Michael Shalayeff. All rights reserved.
7 * Copyright (c) 2003 Ryan McBride. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <sys/param.h>
32 #include <sys/ioctl.h>
33 #include <sys/socket.h>
34 #include <sys/sockio.h>
35
36 #include <stdlib.h>
37 #include <unistd.h>
38
39 #include <net/if.h>
40 #include <netinet/in.h>
41 #include <netinet/in_var.h>
42 #include <netinet/ip_carp.h>
43
44 #include <arpa/inet.h>
45
46 #include <ctype.h>
47 #include <stdbool.h>
48 #include <stdio.h>
49 #include <string.h>
50 #include <stdlib.h>
51 #include <unistd.h>
52 #include <err.h>
53 #include <errno.h>
54 #include <netdb.h>
55
56 #include <libifconfig.h>
57
58 #include "ifconfig.h"
59
60 static const char *carp_states[] = { CARP_STATES };
61
62 static void setcarp_callback(if_ctx *, void *);
63
64 static int carpr_vhid = -1;
65 static int carpr_advskew = -1;
66 static int carpr_advbase = -1;
67 static int carpr_state = -1;
68 static struct in_addr carp_addr;
69 static struct in6_addr carp_addr6;
70 static unsigned char const *carpr_key;
71
72 static void
carp_status(if_ctx * ctx)73 carp_status(if_ctx *ctx)
74 {
75 struct ifconfig_carp carpr[CARP_MAXVHID];
76 char addr_buf[NI_MAXHOST];
77
78 if (ifconfig_carp_get_info(lifh, ctx->ifname, carpr, CARP_MAXVHID) == -1)
79 return;
80
81 for (size_t 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 (ctx->args->printkeys && carpr[i].carpr_key[0] != '\0')
86 printf(" key \"%s\"\n", carpr[i].carpr_key);
87 else
88 printf("\n");
89
90 inet_ntop(AF_INET6, &carpr[i].carpr_addr6, addr_buf,
91 sizeof(addr_buf));
92
93 printf("\t peer %s peer6 %s\n",
94 inet_ntoa(carpr[i].carpr_addr), addr_buf);
95 }
96 }
97
98 static void
setcarp_vhid(if_ctx * ctx,const char * val,int dummy __unused)99 setcarp_vhid(if_ctx *ctx, const char *val, int dummy __unused)
100 {
101 const struct afswtch *afp = ctx->afp;
102
103 carpr_vhid = atoi(val);
104
105 if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID)
106 errx(1, "vhid must be greater than 0 and less than %u",
107 CARP_MAXVHID);
108
109 if (afp->af_setvhid == NULL)
110 errx(1, "%s doesn't support carp(4)", afp->af_name);
111 afp->af_setvhid(carpr_vhid);
112 callback_register(setcarp_callback, NULL);
113 }
114
115 static void
setcarp_callback(if_ctx * ctx,void * arg __unused)116 setcarp_callback(if_ctx *ctx, void *arg __unused)
117 {
118 struct ifconfig_carp carpr = { };
119
120 if (ifconfig_carp_get_vhid(lifh, ctx->ifname, &carpr, carpr_vhid) == -1) {
121 if (ifconfig_err_errno(lifh) != ENOENT)
122 return;
123 }
124
125 carpr.carpr_vhid = carpr_vhid;
126 if (carpr_key != NULL)
127 /* XXX Should hash the password into the key here? */
128 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN);
129 if (carpr_advskew > -1)
130 carpr.carpr_advskew = carpr_advskew;
131 if (carpr_advbase > -1)
132 carpr.carpr_advbase = carpr_advbase;
133 if (carpr_state > -1)
134 carpr.carpr_state = carpr_state;
135 if (carp_addr.s_addr != INADDR_ANY)
136 carpr.carpr_addr = carp_addr;
137 if (! IN6_IS_ADDR_UNSPECIFIED(&carp_addr6))
138 memcpy(&carpr.carpr_addr6, &carp_addr6,
139 sizeof(carp_addr6));
140
141 if (ifconfig_carp_set_info(lifh, ctx->ifname, &carpr))
142 err(1, "SIOCSVH");
143 }
144
145 static void
setcarp_passwd(if_ctx * ctx __unused,const char * val,int dummy __unused)146 setcarp_passwd(if_ctx *ctx __unused, const char *val, int dummy __unused)
147 {
148
149 if (carpr_vhid == -1)
150 errx(1, "passwd requires vhid");
151
152 carpr_key = val;
153 }
154
155 static void
setcarp_advskew(if_ctx * ctx __unused,const char * val,int dummy __unused)156 setcarp_advskew(if_ctx *ctx __unused, const char *val, int dummy __unused)
157 {
158
159 if (carpr_vhid == -1)
160 errx(1, "advskew requires vhid");
161
162 carpr_advskew = atoi(val);
163 }
164
165 static void
setcarp_advbase(if_ctx * ctx __unused,const char * val,int dummy __unused)166 setcarp_advbase(if_ctx *ctx __unused, const char *val, int dummy __unused)
167 {
168
169 if (carpr_vhid == -1)
170 errx(1, "advbase requires vhid");
171
172 carpr_advbase = atoi(val);
173 }
174
175 static void
setcarp_state(if_ctx * ctx __unused,const char * val,int dummy __unused)176 setcarp_state(if_ctx *ctx __unused, const char *val, int dummy __unused)
177 {
178 int i;
179
180 if (carpr_vhid == -1)
181 errx(1, "state requires vhid");
182
183 for (i = 0; i <= CARP_MAXSTATE; i++)
184 if (strcasecmp(carp_states[i], val) == 0) {
185 carpr_state = i;
186 return;
187 }
188
189 errx(1, "unknown state");
190 }
191
192 static void
setcarp_peer(if_ctx * ctx __unused,const char * val,int dummy __unused)193 setcarp_peer(if_ctx *ctx __unused, const char *val, int dummy __unused)
194 {
195 carp_addr.s_addr = inet_addr(val);
196 }
197
198 static void
setcarp_mcast(if_ctx * ctx __unused,const char * val __unused,int dummy __unused)199 setcarp_mcast(if_ctx *ctx __unused, const char *val __unused, int dummy __unused)
200 {
201 carp_addr.s_addr = htonl(INADDR_CARP_GROUP);
202 }
203
204 static void
setcarp_peer6(if_ctx * ctx __unused,const char * val,int dummy __unused)205 setcarp_peer6(if_ctx *ctx __unused, const char *val, int dummy __unused)
206 {
207 struct addrinfo hints, *res;
208
209 memset(&hints, 0, sizeof(hints));
210 hints.ai_family = AF_INET6;
211 hints.ai_flags = AI_NUMERICHOST;
212
213 if (getaddrinfo(val, NULL, &hints, &res) != 0)
214 errx(1, "Invalid IPv6 address %s", val);
215
216 memcpy(&carp_addr6, &(satosin6(res->ai_addr))->sin6_addr, sizeof(carp_addr6));
217 freeaddrinfo(res);
218 }
219
220 static void
setcarp_mcast6(if_ctx * ctx __unused,const char * val __unused,int dummy __unused)221 setcarp_mcast6(if_ctx *ctx __unused, const char *val __unused, int dummy __unused)
222 {
223 bzero(&carp_addr6, sizeof(carp_addr6));
224 carp_addr6.s6_addr[0] = 0xff;
225 carp_addr6.s6_addr[1] = 0x02;
226 carp_addr6.s6_addr[15] = 0x12;
227 }
228
229 static struct cmd carp_cmds[] = {
230 DEF_CMD_ARG("advbase", setcarp_advbase),
231 DEF_CMD_ARG("advskew", setcarp_advskew),
232 DEF_CMD_ARG("pass", setcarp_passwd),
233 DEF_CMD_ARG("vhid", setcarp_vhid),
234 DEF_CMD_ARG("state", setcarp_state),
235 DEF_CMD_ARG("peer", setcarp_peer),
236 DEF_CMD("mcast", 0, setcarp_mcast),
237 DEF_CMD_ARG("peer6", setcarp_peer6),
238 DEF_CMD("mcast6", 0, setcarp_mcast6),
239 };
240 static struct afswtch af_carp = {
241 .af_name = "af_carp",
242 .af_af = AF_UNSPEC,
243 .af_other_status = carp_status,
244 };
245
246 static __constructor void
carp_ctor(void)247 carp_ctor(void)
248 {
249 for (size_t i = 0; i < nitems(carp_cmds); i++)
250 cmd_register(&carp_cmds[i]);
251 af_register(&af_carp);
252 }
253