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 static carp_version_t carpr_version;
72 static uint8_t carpr_vrrp_prio;
73 static uint16_t carpr_vrrp_adv_inter;
74
75 static void
carp_status(if_ctx * ctx)76 carp_status(if_ctx *ctx)
77 {
78 struct ifconfig_carp carpr[CARP_MAXVHID];
79 char addr_buf[NI_MAXHOST];
80
81 if (ifconfig_carp_get_info(lifh, ctx->ifname, carpr, CARP_MAXVHID) == -1)
82 return;
83
84 for (size_t i = 0; i < carpr[0].carpr_count; i++) {
85 switch (carpr[i].carpr_version) {
86 case CARP_VERSION_CARP:
87 printf("\tcarp: %s vhid %d advbase %d advskew %d",
88 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid,
89 carpr[i].carpr_advbase, carpr[i].carpr_advskew);
90 if (ctx->args->printkeys && carpr[i].carpr_key[0] != '\0')
91 printf(" key \"%s\"\n", carpr[i].carpr_key);
92 else
93 printf("\n");
94
95 inet_ntop(AF_INET6, &carpr[i].carpr_addr6, addr_buf,
96 sizeof(addr_buf));
97
98 printf("\t peer %s peer6 %s\n",
99 inet_ntoa(carpr[i].carpr_addr), addr_buf);
100 break;
101 case CARP_VERSION_VRRPv3:
102 printf("\tvrrp: %s vrid %d prio %d interval %d\n",
103 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid,
104 carpr[i].carpr_vrrp_prio, carpr[i].carpr_vrrp_adv_inter);
105 break;
106 }
107 }
108 }
109
110 static void
setcarp_vhid(if_ctx * ctx,const char * val,int dummy __unused)111 setcarp_vhid(if_ctx *ctx, const char *val, int dummy __unused)
112 {
113 const struct afswtch *afp = ctx->afp;
114
115 carpr_vhid = atoi(val);
116
117 if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID)
118 errx(1, "vhid must be greater than 0 and less than %u",
119 CARP_MAXVHID);
120
121 if (afp->af_setvhid == NULL)
122 errx(1, "%s doesn't support carp(4)", afp->af_name);
123 afp->af_setvhid(carpr_vhid);
124 callback_register(setcarp_callback, NULL);
125 }
126
127 static void
setcarp_callback(if_ctx * ctx,void * arg __unused)128 setcarp_callback(if_ctx *ctx, void *arg __unused)
129 {
130 struct ifconfig_carp carpr = { };
131
132 if (ifconfig_carp_get_vhid(lifh, ctx->ifname, &carpr, carpr_vhid) == -1) {
133 if (ifconfig_err_errno(lifh) != ENOENT)
134 return;
135 }
136
137 carpr.carpr_vhid = carpr_vhid;
138 if (carpr_key != NULL)
139 /* XXX Should hash the password into the key here? */
140 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN);
141 if (carpr_advskew > -1)
142 carpr.carpr_advskew = carpr_advskew;
143 if (carpr_advbase > -1)
144 carpr.carpr_advbase = carpr_advbase;
145 if (carpr_state > -1)
146 carpr.carpr_state = carpr_state;
147 if (carp_addr.s_addr != INADDR_ANY)
148 carpr.carpr_addr = carp_addr;
149 if (! IN6_IS_ADDR_UNSPECIFIED(&carp_addr6))
150 memcpy(&carpr.carpr_addr6, &carp_addr6,
151 sizeof(carp_addr6));
152 if (carpr_version != 0)
153 carpr.carpr_version = carpr_version;
154 if (carpr_vrrp_prio != 0)
155 carpr.carpr_vrrp_prio = carpr_vrrp_prio;
156 if (carpr_vrrp_adv_inter != 0)
157 carpr.carpr_vrrp_adv_inter = carpr_vrrp_adv_inter;
158
159 if (ifconfig_carp_set_info(lifh, ctx->ifname, &carpr))
160 err(1, "SIOCSVH");
161 }
162
163 static void
setcarp_passwd(if_ctx * ctx __unused,const char * val,int dummy __unused)164 setcarp_passwd(if_ctx *ctx __unused, const char *val, int dummy __unused)
165 {
166
167 if (carpr_vhid == -1)
168 errx(1, "passwd requires vhid");
169
170 carpr_key = val;
171 }
172
173 static void
setcarp_advskew(if_ctx * ctx __unused,const char * val,int dummy __unused)174 setcarp_advskew(if_ctx *ctx __unused, const char *val, int dummy __unused)
175 {
176
177 if (carpr_vhid == -1)
178 errx(1, "advskew requires vhid");
179
180 carpr_advskew = atoi(val);
181 }
182
183 static void
setcarp_advbase(if_ctx * ctx __unused,const char * val,int dummy __unused)184 setcarp_advbase(if_ctx *ctx __unused, const char *val, int dummy __unused)
185 {
186
187 if (carpr_vhid == -1)
188 errx(1, "advbase requires vhid");
189
190 carpr_advbase = atoi(val);
191 }
192
193 static void
setcarp_state(if_ctx * ctx __unused,const char * val,int dummy __unused)194 setcarp_state(if_ctx *ctx __unused, const char *val, int dummy __unused)
195 {
196 int i;
197
198 if (carpr_vhid == -1)
199 errx(1, "state requires vhid");
200
201 for (i = 0; i <= CARP_MAXSTATE; i++)
202 if (strcasecmp(carp_states[i], val) == 0) {
203 carpr_state = i;
204 return;
205 }
206
207 errx(1, "unknown state");
208 }
209
210 static void
setcarp_peer(if_ctx * ctx __unused,const char * val,int dummy __unused)211 setcarp_peer(if_ctx *ctx __unused, const char *val, int dummy __unused)
212 {
213 carp_addr.s_addr = inet_addr(val);
214 }
215
216 static void
setcarp_mcast(if_ctx * ctx __unused,const char * val __unused,int dummy __unused)217 setcarp_mcast(if_ctx *ctx __unused, const char *val __unused, int dummy __unused)
218 {
219 carp_addr.s_addr = htonl(INADDR_CARP_GROUP);
220 }
221
222 static void
setcarp_peer6(if_ctx * ctx __unused,const char * val,int dummy __unused)223 setcarp_peer6(if_ctx *ctx __unused, const char *val, int dummy __unused)
224 {
225 struct addrinfo hints, *res;
226
227 memset(&hints, 0, sizeof(hints));
228 hints.ai_family = AF_INET6;
229 hints.ai_flags = AI_NUMERICHOST;
230
231 if (getaddrinfo(val, NULL, &hints, &res) != 0)
232 errx(1, "Invalid IPv6 address %s", val);
233
234 memcpy(&carp_addr6, &(satosin6(res->ai_addr))->sin6_addr, sizeof(carp_addr6));
235 freeaddrinfo(res);
236 }
237
238 static void
setcarp_mcast6(if_ctx * ctx __unused,const char * val __unused,int dummy __unused)239 setcarp_mcast6(if_ctx *ctx __unused, const char *val __unused, int dummy __unused)
240 {
241 bzero(&carp_addr6, sizeof(carp_addr6));
242 carp_addr6.s6_addr[0] = 0xff;
243 carp_addr6.s6_addr[1] = 0x02;
244 carp_addr6.s6_addr[15] = 0x12;
245 }
246
247 static void
setcarp_version(if_ctx * ctx __unused,const char * val,int dummy __unused)248 setcarp_version(if_ctx *ctx __unused, const char *val, int dummy __unused)
249 {
250 carpr_version = atoi(val);
251
252 if (carpr_version != CARP_VERSION_CARP && carpr_version != CARP_VERSION_VRRPv3)
253 errx(1, "version must be %d or %d", CARP_VERSION_CARP,
254 CARP_VERSION_VRRPv3);
255 }
256
257 static void
setvrrp_prio(if_ctx * ctx __unused,const char * val,int dummy __unused)258 setvrrp_prio(if_ctx *ctx __unused, const char *val, int dummy __unused)
259 {
260 carpr_vrrp_prio = atoi(val);
261 }
262
263 static void
setvrrp_interval(if_ctx * ctx __unused,const char * val,int dummy __unused)264 setvrrp_interval(if_ctx *ctx __unused, const char *val, int dummy __unused)
265 {
266 carpr_vrrp_adv_inter = atoi(val);
267
268 if (carpr_vrrp_adv_inter == 0 || carpr_vrrp_adv_inter > VRRP_MAX_INTERVAL)
269 errx(1, "vrrpinterval must be greater than 0 and less than %d", VRRP_MAX_INTERVAL);
270 }
271
272 static struct cmd carp_cmds[] = {
273 DEF_CMD_ARG("advbase", setcarp_advbase),
274 DEF_CMD_ARG("advskew", setcarp_advskew),
275 DEF_CMD_ARG("pass", setcarp_passwd),
276 DEF_CMD_ARG("vhid", setcarp_vhid),
277 DEF_CMD_ARG("state", setcarp_state),
278 DEF_CMD_ARG("peer", setcarp_peer),
279 DEF_CMD("mcast", 0, setcarp_mcast),
280 DEF_CMD_ARG("peer6", setcarp_peer6),
281 DEF_CMD("mcast6", 0, setcarp_mcast6),
282 DEF_CMD_ARG("carpver", setcarp_version),
283 DEF_CMD_ARG("vrrpprio", setvrrp_prio),
284 DEF_CMD_ARG("vrrpinterval", setvrrp_interval),
285 };
286 static struct afswtch af_carp = {
287 .af_name = "af_carp",
288 .af_af = AF_UNSPEC,
289 .af_other_status = carp_status,
290 };
291
292 static __constructor void
carp_ctor(void)293 carp_ctor(void)
294 {
295 /* Default to multicast. */
296 setcarp_mcast(NULL, NULL, 0);
297 setcarp_mcast6(NULL, NULL, 0);
298
299 for (size_t i = 0; i < nitems(carp_cmds); i++)
300 cmd_register(&carp_cmds[i]);
301 af_register(&af_carp);
302 }
303