1 /* $KAME: rrenumd.c,v 1.20 2000/11/08 02:40:53 itojun Exp $ */
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $FreeBSD: src/usr.sbin/rrenumd/rrenumd.c,v 1.1.2.4 2001/07/09 09:49:49 ume Exp $
34 #include <sys/param.h>
35 #include <sys/socket.h>
41 #include <net/route.h>
43 #include <netinet/in_systm.h>
44 #include <netinet/in.h>
45 #include <netinet/ip.h>
46 #include <netinet/ip6.h>
47 #include <netinet/icmp6.h>
49 #include <arpa/inet.h>
52 #include <netinet6/ipsec.h>
64 #define LL_ALLROUTERS "ff02::2"
65 #define SL_ALLROUTERS "ff05::2"
67 #define RR_MCHLIM_DEFAULT 64
69 #ifndef IN6_IS_SCOPE_LINKLOCAL
70 #define IN6_IS_SCOPE_LINKLOCAL(a) \
71 ((IN6_IS_ADDR_LINKLOCAL(a)) || \
72 (IN6_IS_ADDR_MC_LINKLOCAL(a)))
73 #endif /* IN6_IS_SCOPE_LINKLOCAL */
79 #ifdef IPSEC_POLICY_IPSEC
81 #else /* IPSEC_POLICY_IPSEC */
84 #endif /* IPSEC_POLICY_IPSEC */
88 struct msghdr sndmhdr;
89 struct msghdr rcvmhdr;
90 struct sockaddr_in6 from;
91 struct sockaddr_in6 sin6_ll_allrouters;
94 int with_v4dest, with_v6dest;
95 struct in6_addr prefix; /* ADHOC */
96 int prefixlen = 64; /* ADHOC */
98 extern int parse(FILE **);
100 static void show_usage(void);
101 static void init_sin6(struct sockaddr_in6 *, const char *);
103 static void join_multi(const char *);
105 static void init_globals(void);
106 static void config(FILE **);
107 #ifdef IPSEC_POLICY_IPSEC
108 static void sock6_open(struct flags *, char *);
109 static void sock4_open(struct flags *, char *);
111 static void sock6_open(struct flags *);
112 static void sock4_open(struct flags *);
114 static void rrenum_output(struct payload_list *, struct dst_list *);
115 static void rrenum_snd_eachdst(struct payload_list *);
117 static void rrenum_snd_fullsequence(void);
119 static void rrenum_input(int);
122 /* Print usage. Don't call this after daemonized. */
126 fprintf(stderr, "usage: rrenumd [-c conf_file|-s] [-df"
128 #ifdef IPSEC_POLICY_IPSEC
130 #else /* IPSEC_POLICY_IPSEC */
132 #endif /* IPSEC_POLICY_IPSEC */
139 init_sin6(struct sockaddr_in6 *sin6, const char *addr_ascii)
141 memset(sin6, 0, sizeof(*sin6));
142 sin6->sin6_len = sizeof(*sin6);
143 sin6->sin6_family = AF_INET6;
144 if (inet_pton(AF_INET6, addr_ascii, &sin6->sin6_addr) != 1)
145 ; /* XXX do something */
148 #if 0 /* XXX: not necessary ?? */
150 join_multi(const char *addrname)
152 struct ipv6_mreq mreq;
154 if (inet_pton(AF_INET6, addrname, &mreq.ipv6mr_multiaddr.s6_addr)
156 syslog(LOG_ERR, "<%s> inet_pton failed(library bug?)",
160 /* ADHOC: currently join only one */
162 if ((mreq.ipv6mr_interface = if_nametoindex(ifname)) == 0) {
163 syslog(LOG_ERR, "<%s> ifname %s should be invalid: %s",
164 __func__, ifname, strerror(errno));
167 if (setsockopt(s, IPPROTO_IPV6, IPV6_JOIN_GROUP,
170 syslog(LOG_ERR, "<%s> IPV6_JOIN_GROUP on %s: %s",
171 __func__, ifname, strerror(errno));
181 static struct iovec rcviov;
182 static u_char rprdata[4500]; /* maximal MTU of connected links */
183 static u_char *rcvcmsgbuf = NULL;
184 static u_char *sndcmsgbuf = NULL;
185 int sndcmsglen, rcvcmsglen;
187 /* init ll_allrouters */
188 init_sin6(&sin6_ll_allrouters, LL_ALLROUTERS);
190 /* initialize msghdr for receiving packets */
191 rcviov.iov_base = (caddr_t)rprdata;
192 rcviov.iov_len = sizeof(rprdata);
193 rcvmhdr.msg_namelen = sizeof(struct sockaddr_in6);
194 rcvmhdr.msg_iov = &rcviov;
195 rcvmhdr.msg_iovlen = 1;
196 rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
197 CMSG_SPACE(sizeof(int));
198 if (rcvcmsgbuf == NULL &&
199 (rcvcmsgbuf = (u_char *)malloc(rcvcmsglen)) == NULL) {
200 syslog(LOG_ERR, "<%s>: malloc failed", __func__);
203 rcvmhdr.msg_control = (caddr_t)rcvcmsgbuf;
204 rcvmhdr.msg_controllen = rcvcmsglen;
206 /* initialize msghdr for sending packets */
207 sndmhdr.msg_namelen = sizeof(struct sockaddr_in6);
208 sndmhdr.msg_iovlen = 1;
209 sndcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
210 CMSG_SPACE(sizeof(int));
211 if (sndcmsgbuf == NULL &&
212 (sndcmsgbuf = (u_char *)malloc(sndcmsglen)) == NULL) {
213 syslog(LOG_ERR, "<%s>: malloc failed", __func__);
216 sndmhdr.msg_control = (caddr_t)sndcmsgbuf;
217 sndmhdr.msg_controllen = sndcmsglen;
223 struct payload_list *pl;
225 struct icmp6_router_renum *irr;
226 struct rr_pco_match *rpm;
228 if (parse(fpp) < 0) {
229 syslog(LOG_ERR, "<%s> parse failed", __func__);
233 /* initialize fields not configured by parser */
234 for (pl = pl_head; pl; pl = pl->pl_next) {
235 iov = (struct iovec *)&pl->pl_sndiov;
236 irr = (struct icmp6_router_renum *)&pl->pl_irr;
237 rpm = (struct rr_pco_match *)&pl->pl_rpm;
239 irr->rr_type = ICMP6_ROUTER_RENUMBERING;
242 * now we don't support multiple PCOs in a rr message.
243 * so segment number is not supported.
245 /* TODO: rr flags config in parser */
246 irr->rr_flags |= ICMP6_RR_FLAGS_SPECSITE;
247 /* TODO: max delay config in parser */
250 * means only 1 use_prefix is contained as router-renum-05.txt.
251 * now we don't support multiple PCOs in a rr message,
252 * nor multiple use_prefix in one PCO.
254 rpm->rpm_len = 4*1 +3;
255 rpm->rpm_ordinal = 0;
256 iov->iov_base = (caddr_t)irr;
257 iov->iov_len = sizeof(struct icmp6_router_renum)
258 + sizeof(struct rr_pco_match)
259 + sizeof(struct rr_pco_use);
264 sock6_open(struct flags *flags
265 #ifdef IPSEC_POLICY_IPSEC
267 #endif /* IPSEC_POLICY_IPSEC */
270 struct icmp6_filter filt;
273 #ifndef IPSEC_POLICY_IPSEC
278 if (with_v6dest == 0)
281 (s6 = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) {
282 syslog(LOG_ERR, "<%s> socket(v6): %s", __func__,
288 * join all routers multicast addresses.
290 #if 0 /* XXX: not necessary ?? */
291 join_multi(LL_ALLROUTERS);
292 join_multi(SL_ALLROUTERS);
295 /* set icmpv6 filter */
296 ICMP6_FILTER_SETBLOCKALL(&filt);
297 ICMP6_FILTER_SETPASS(ICMP6_ROUTER_RENUMBERING, &filt);
298 if (setsockopt(s6, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
300 syslog(LOG_ERR, "<%s> IICMP6_FILTER: %s",
301 __func__, strerror(errno));
305 /* specify to tell receiving interface */
307 if (setsockopt(s6, IPPROTO_IPV6, IPV6_PKTINFO, &on,
309 syslog(LOG_ERR, "<%s> IPV6_PKTINFO: %s",
310 __func__, strerror(errno));
315 #ifdef IPSEC_POLICY_IPSEC
318 buf = ipsec_set_policy(policy, strlen(policy));
320 errx(1, "%s", ipsec_strerror());
321 /* XXX should handle in/out bound policy. */
322 if (setsockopt(s6, IPPROTO_IPV6, IPV6_IPSEC_POLICY,
323 buf, ipsec_get_policylen(buf)) < 0)
324 err(1, "setsockopt(IPV6_IPSEC_POLICY)");
327 #else /* IPSEC_POLICY_IPSEC */
329 optval = IPSEC_LEVEL_REQUIRE;
330 if (setsockopt(s6, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
331 &optval, sizeof(optval)) == -1) {
332 syslog(LOG_ERR, "<%s> IPV6_AUTH_TRANS_LEVEL: %s",
333 __func__, strerror(errno));
337 if (flags->encrypt) {
338 optval = IPSEC_LEVEL_REQUIRE;
339 if (setsockopt(s6, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
340 &optval, sizeof(optval)) == -1) {
341 syslog(LOG_ERR, "<%s> IPV6_ESP_TRANS_LEVEL: %s",
342 __func__, strerror(errno));
346 #endif /* IPSEC_POLICY_IPSEC */
353 sock4_open(struct flags *flags
354 #ifdef IPSEC_POLICY_IPSEC
356 #endif /* IPSEC_POLICY_IPSEC */
360 #ifndef IPSEC_POLICY_IPSEC
365 if (with_v4dest == 0)
367 if ((s4 = socket(AF_INET, SOCK_RAW, IPPROTO_ICMPV6)) < 0) {
368 syslog(LOG_ERR, "<%s> socket(v4): %s", __func__,
373 #if 0 /* XXX: not necessary ?? */
375 * join all routers multicast addresses.
377 some_join_function();
381 #ifdef IPSEC_POLICY_IPSEC
384 buf = ipsec_set_policy(policy, strlen(policy));
386 errx(1, "%s", ipsec_strerror());
387 /* XXX should handle in/out bound policy. */
388 if (setsockopt(s4, IPPROTO_IP, IP_IPSEC_POLICY,
389 buf, ipsec_get_policylen(buf)) < 0)
390 err(1, "setsockopt(IP_IPSEC_POLICY)");
393 #else /* IPSEC_POLICY_IPSEC */
395 optval = IPSEC_LEVEL_REQUIRE;
396 if (setsockopt(s4, IPPROTO_IP, IP_AUTH_TRANS_LEVEL,
397 &optval, sizeof(optval)) == -1) {
398 syslog(LOG_ERR, "<%s> IP_AUTH_TRANS_LEVEL: %s",
399 __func__, strerror(errno));
403 if (flags->encrypt) {
404 optval = IPSEC_LEVEL_REQUIRE;
405 if (setsockopt(s4, IPPROTO_IP, IP_ESP_TRANS_LEVEL,
406 &optval, sizeof(optval)) == -1) {
407 syslog(LOG_ERR, "<%s> IP_ESP_TRANS_LEVEL: %s",
408 __func__, strerror(errno));
412 #endif /* IPSEC_POLICY_IPSEC */
419 rrenum_output(struct payload_list *pl, struct dst_list *dl)
423 struct in6_pktinfo *pi;
424 struct sockaddr_in6 *sin6 = NULL;
426 sndmhdr.msg_name = (caddr_t)dl->dl_dst;
427 if (dl->dl_dst->sa_family == AF_INET6)
428 sin6 = (struct sockaddr_in6 *)dl->dl_dst;
431 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
432 int hoplimit = RR_MCHLIM_DEFAULT;
434 cm = CMSG_FIRSTHDR(&sndmhdr);
435 /* specify the outgoing interface */
436 cm->cmsg_level = IPPROTO_IPV6;
437 cm->cmsg_type = IPV6_PKTINFO;
438 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
439 pi = (struct in6_pktinfo *)CMSG_DATA(cm);
440 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*XXX*/
441 pi->ipi6_ifindex = sin6->sin6_scope_id;
442 msglen += CMSG_LEN(sizeof(struct in6_pktinfo));
444 /* specify the hop limit of the packet if dest is link local */
445 /* not defined by router-renum-05.txt, but maybe its OK */
446 cm = CMSG_NXTHDR(&sndmhdr, cm);
447 cm->cmsg_level = IPPROTO_IPV6;
448 cm->cmsg_type = IPV6_HOPLIMIT;
449 cm->cmsg_len = CMSG_LEN(sizeof(int));
450 memcpy(CMSG_DATA(cm), &hoplimit, sizeof(int));
451 msglen += CMSG_LEN(sizeof(int));
453 sndmhdr.msg_controllen = msglen;
454 if (sndmhdr.msg_controllen == 0)
455 sndmhdr.msg_control = 0;
457 sndmhdr.msg_iov = &pl->pl_sndiov;
458 i = sendmsg(dl->dl_dst->sa_family == AF_INET ? s4 : s6, &sndmhdr, 0);
460 if (i < 0 || i != sndmhdr.msg_iov->iov_len)
461 syslog(LOG_ERR, "<%s> sendmsg: %s", __func__,
466 rrenum_snd_eachdst(struct payload_list *pl)
470 for (dl = dl_head; dl; dl = dl->dl_next) {
471 rrenum_output(pl, dl);
477 rrenum_snd_fullsequence(void)
479 struct payload_list *pl;
481 for (pl = pl_head; pl; pl = pl->pl_next) {
482 rrenum_snd_eachdst(pl);
491 struct icmp6_router_renum *rr;
494 if ((i = recvmsg(s, &rcvmhdr, 0)) < 0) {
495 syslog(LOG_ERR, "<%s> recvmsg: %s", __func__,
500 i -= sizeof(struct ip);
501 if (i < sizeof(struct icmp6_router_renum)) {
502 syslog(LOG_ERR, "<%s> packet size(%d) is too short",
507 struct ip *ip = (struct ip *)rcvmhdr.msg_iov->iov_base;
509 rr = (struct icmp6_router_renum *)(ip + 1);
511 rr = (struct icmp6_router_renum *)rcvmhdr.msg_iov->iov_base;
513 switch(rr->rr_code) {
514 case ICMP6_ROUTER_RENUMBERING_COMMAND:
515 /* COMMAND will be processed by rtadvd */
517 case ICMP6_ROUTER_RENUMBERING_RESULT:
518 /* TODO: receiving result message */
521 syslog(LOG_ERR, "<%s> received unknown code %d",
522 __func__, rr->rr_code);
528 main(int argc, char *argv[])
532 struct timeval timeout;
533 int ch, i, maxfd = 0, send_counter = 0;
535 struct payload_list *pl;
536 #ifdef IPSEC_POLICY_IPSEC
540 memset(&flags, 0, sizeof(flags));
541 openlog("rrenumd", LOG_PID, LOG_DAEMON);
544 while ((ch = getopt(argc, argv, "c:sdf"
546 #ifdef IPSEC_POLICY_IPSEC
548 #else /* IPSEC_POLICY_IPSEC */
550 #endif /* IPSEC_POLICY_IPSEC */
555 if((fp = fopen(optarg, "r")) == NULL) {
557 "<%s> config file %s open failed",
572 #ifdef IPSEC_POLICY_IPSEC
575 policy = strdup(optarg);
577 #else /* IPSEC_POLICY_IPSEC */
584 #endif /* IPSEC_POLICY_IPSEC */
594 if (flags.debug == 0)
595 setlogmask(LOG_UPTO(LOG_ERR));
596 if (flags.debug == 1)
597 setlogmask(LOG_UPTO(LOG_INFO));
599 /* init global variables */
605 #ifdef IPSEC_POLICY_IPSEC
607 #endif /* IPSEC_POLICY_IPSEC */
610 #ifdef IPSEC_POLICY_IPSEC
612 #endif /* IPSEC_POLICY_IPSEC */
630 /* ADHOC: timeout each 30seconds */
631 memset(&timeout, 0, sizeof(timeout));
633 /* init temporary payload_list and send_counter*/
635 send_counter = retry + 1;
637 struct fd_set select_fd = fdset; /* reinitialize */
639 if ((i = select(maxfd + 1, &select_fd, NULL, NULL,
641 syslog(LOG_ERR, "<%s> select: %s",
642 __func__, strerror(errno));
645 if (i == 0) { /* timeout */
648 rrenum_snd_eachdst(pl);
651 if (send_counter == 0) {
654 send_counter = retry + 1;
657 if (FD_ISSET(s4, &select_fd))
659 if (FD_ISSET(s6, &select_fd))