171333Sitojun/* $FreeBSD$ */ 2118968Sume/* $KAME: rtadvd.c,v 1.82 2003/08/05 12:34:23 itojun Exp $ */ 362656Skris 455505Sshin/* 555505Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6224144Shrs * Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org> 755505Sshin * All rights reserved. 8222732Shrs * 955505Sshin * Redistribution and use in source and binary forms, with or without 1055505Sshin * modification, are permitted provided that the following conditions 1155505Sshin * are met: 1255505Sshin * 1. Redistributions of source code must retain the above copyright 1355505Sshin * notice, this list of conditions and the following disclaimer. 1455505Sshin * 2. Redistributions in binary form must reproduce the above copyright 1555505Sshin * notice, this list of conditions and the following disclaimer in the 1655505Sshin * documentation and/or other materials provided with the distribution. 1755505Sshin * 3. Neither the name of the project nor the names of its contributors 1855505Sshin * may be used to endorse or promote products derived from this software 1955505Sshin * without specific prior written permission. 20222732Shrs * 2155505Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2255505Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2355505Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2455505Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2555505Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2655505Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2755505Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2855505Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2955505Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3055505Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3155505Sshin * SUCH DAMAGE. 3255505Sshin */ 3355505Sshin 3455505Sshin#include <sys/param.h> 35222732Shrs#include <sys/ioctl.h> 3655505Sshin#include <sys/socket.h> 3755505Sshin#include <sys/uio.h> 3878064Sume#include <sys/queue.h> 39224144Shrs#include <sys/stat.h> 40222732Shrs#include <sys/sysctl.h> 4155505Sshin 4255505Sshin#include <net/if.h> 43224144Shrs#include <net/if_types.h> 44222732Shrs#include <net/if_media.h> 45224144Shrs#include <net/if_dl.h> 4655505Sshin#include <net/route.h> 4755505Sshin#include <netinet/in.h> 4855505Sshin#include <netinet/ip6.h> 4955505Sshin#include <netinet6/ip6_var.h> 5055505Sshin#include <netinet/icmp6.h> 5155505Sshin 5255505Sshin#include <arpa/inet.h> 5355505Sshin 54222732Shrs#include <net/if_var.h> 55222732Shrs#include <netinet/in_var.h> 56222732Shrs#include <netinet6/nd6.h> 57222732Shrs 5855505Sshin#include <time.h> 5955505Sshin#include <unistd.h> 6055505Sshin#include <stdio.h> 6155505Sshin#include <err.h> 6255505Sshin#include <errno.h> 63224144Shrs#include <inttypes.h> 64216675Sdelphij#include <libutil.h> 65222732Shrs#include <netdb.h> 66224144Shrs#include <signal.h> 6755505Sshin#include <string.h> 6855505Sshin#include <stdlib.h> 6955505Sshin#include <syslog.h> 70118916Sume#include <poll.h> 71118916Sume 72224144Shrs#include "pathnames.h" 7355505Sshin#include "rtadvd.h" 74224144Shrs#include "if.h" 7555505Sshin#include "rrenum.h" 7655505Sshin#include "advcap.h" 77224144Shrs#include "timer_subr.h" 7855505Sshin#include "timer.h" 7955505Sshin#include "config.h" 80224144Shrs#include "control.h" 81224144Shrs#include "control_server.h" 8255505Sshin 83224144Shrs#define RTADV_TYPE2BITMASK(type) (0x1 << type) 84224144Shrs 8562656Skrisstruct msghdr rcvmhdr; 86224144Shrsstatic char *rcvcmsgbuf; 8762656Skrisstatic size_t rcvcmsgbuflen; 88224144Shrsstatic char *sndcmsgbuf = NULL; 8962656Skrisstatic size_t sndcmsgbuflen; 9062656Skrisstruct msghdr sndmhdr; 9162656Skrisstruct iovec rcviov[2]; 9262656Skrisstruct iovec sndiov[2]; 93118913Sumestruct sockaddr_in6 rcvfrom; 94222732Shrsstatic const char *pidfilename = _PATH_RTADVDPID; 95222732Shrsconst char *conffile = _PATH_RTADVDCONF; 96216675Sdelphijstatic struct pidfh *pfh; 97253058Shrsstatic int dflag, sflag; 98224144Shrsstatic int wait_shutdown; 9955505Sshin 100224144Shrs#define PFD_RAWSOCK 0 101224144Shrs#define PFD_RTSOCK 1 102224144Shrs#define PFD_CSOCK 2 103224144Shrs#define PFD_MAX 3 104224144Shrs 105222732Shrsstruct railist_head_t railist = 106222732Shrs TAILQ_HEAD_INITIALIZER(railist); 107224144Shrsstruct ifilist_head_t ifilist = 108224144Shrs TAILQ_HEAD_INITIALIZER(ifilist); 10955505Sshin 11062656Skrisstruct nd_optlist { 111222732Shrs TAILQ_ENTRY(nd_optlist) nol_next; 112222732Shrs struct nd_opt_hdr *nol_opt; 11355505Sshin}; 114222732Shrsunion nd_opt { 115222732Shrs struct nd_opt_hdr *opt_array[9]; 11655505Sshin struct { 11762656Skris struct nd_opt_hdr *zero; 11862656Skris struct nd_opt_hdr *src_lladdr; 11962656Skris struct nd_opt_hdr *tgt_lladdr; 12062656Skris struct nd_opt_prefix_info *pi; 12162656Skris struct nd_opt_rd_hdr *rh; 12262656Skris struct nd_opt_mtu *mtu; 123222732Shrs TAILQ_HEAD(, nd_optlist) opt_list; 12455505Sshin } nd_opt_each; 12555505Sshin}; 126222732Shrs#define opt_src_lladdr nd_opt_each.src_lladdr 127222732Shrs#define opt_tgt_lladdr nd_opt_each.tgt_lladdr 128222732Shrs#define opt_pi nd_opt_each.pi 129222732Shrs#define opt_rh nd_opt_each.rh 130222732Shrs#define opt_mtu nd_opt_each.mtu 131222732Shrs#define opt_list nd_opt_each.opt_list 13255505Sshin 133222732Shrs#define NDOPT_FLAG_SRCLINKADDR (1 << 0) 134222732Shrs#define NDOPT_FLAG_TGTLINKADDR (1 << 1) 135222732Shrs#define NDOPT_FLAG_PREFIXINFO (1 << 2) 136222732Shrs#define NDOPT_FLAG_RDHDR (1 << 3) 137222732Shrs#define NDOPT_FLAG_MTU (1 << 4) 138222732Shrs#define NDOPT_FLAG_RDNSS (1 << 5) 139222732Shrs#define NDOPT_FLAG_DNSSL (1 << 6) 14055505Sshin 141253058Shrsstatic uint32_t ndopt_flags[] = { 142222732Shrs [ND_OPT_SOURCE_LINKADDR] = NDOPT_FLAG_SRCLINKADDR, 143222732Shrs [ND_OPT_TARGET_LINKADDR] = NDOPT_FLAG_TGTLINKADDR, 144222732Shrs [ND_OPT_PREFIX_INFORMATION] = NDOPT_FLAG_PREFIXINFO, 145222732Shrs [ND_OPT_REDIRECTED_HEADER] = NDOPT_FLAG_RDHDR, 146222732Shrs [ND_OPT_MTU] = NDOPT_FLAG_MTU, 147222732Shrs [ND_OPT_RDNSS] = NDOPT_FLAG_RDNSS, 148222732Shrs [ND_OPT_DNSSL] = NDOPT_FLAG_DNSSL, 14955505Sshin}; 15055505Sshin 151224144Shrsstatic void rtadvd_shutdown(void); 152224144Shrsstatic void sock_open(struct sockinfo *); 153224144Shrsstatic void rtsock_open(struct sockinfo *); 154224144Shrsstatic void rtadvd_input(struct sockinfo *); 155222732Shrsstatic void rs_input(int, struct nd_router_solicit *, 156222732Shrs struct in6_pktinfo *, struct sockaddr_in6 *); 157222732Shrsstatic void ra_input(int, struct nd_router_advert *, 158222732Shrs struct in6_pktinfo *, struct sockaddr_in6 *); 159222732Shrsstatic int prefix_check(struct nd_opt_prefix_info *, struct rainfo *, 160222732Shrs struct sockaddr_in6 *); 161222732Shrsstatic int nd6_options(struct nd_opt_hdr *, int, 162224144Shrs union nd_opt *, uint32_t); 163222732Shrsstatic void free_ndopts(union nd_opt *); 164224144Shrsstatic void rtmsg_input(struct sockinfo *); 165224144Shrsstatic void set_short_delay(struct ifinfo *); 166222732Shrsstatic int check_accept_rtadv(int); 167222732Shrs 168247270Sdesstatic void 169247270Sdesusage(void) 170247270Sdes{ 171247270Sdes 172247270Sdes fprintf(stderr, "usage: rtadvd [-dDfRs] " 173247270Sdes "[-c configfile] [-C ctlsock] [-M ifname] [-p pidfile]\n"); 174247270Sdes exit(1); 175247270Sdes} 176247270Sdes 17755505Sshinint 178222732Shrsmain(int argc, char *argv[]) 17955505Sshin{ 180224144Shrs struct pollfd set[PFD_MAX]; 181253970Shrs struct timespec *timeout; 18255505Sshin int i, ch; 183118959Sume int fflag = 0, logopt; 184224144Shrs int error; 185216675Sdelphij pid_t pid, otherpid; 18655505Sshin 18755505Sshin /* get command line options and arguments */ 188247270Sdes while ((ch = getopt(argc, argv, "c:C:dDfhM:p:Rs")) != -1) { 18997712Sume switch (ch) { 19097712Sume case 'c': 19197712Sume conffile = optarg; 19297712Sume break; 193224144Shrs case 'C': 194224144Shrs ctrlsock.si_name = optarg; 195224144Shrs break; 19697712Sume case 'd': 197222732Shrs dflag++; 19897712Sume break; 19997712Sume case 'D': 200225519Shrs dflag += 3; 20197712Sume break; 20297712Sume case 'f': 20397712Sume fflag = 1; 20497712Sume break; 20578064Sume case 'M': 20678064Sume mcastif = optarg; 20778064Sume break; 20897712Sume case 'R': 20997712Sume fprintf(stderr, "rtadvd: " 21097712Sume "the -R option is currently ignored.\n"); 21197712Sume /* accept_rr = 1; */ 21297712Sume /* run anyway... */ 21397712Sume break; 21497712Sume case 's': 21597712Sume sflag = 1; 21697712Sume break; 217216675Sdelphij case 'p': 218216675Sdelphij pidfilename = optarg; 219216675Sdelphij break; 220247270Sdes default: 221247270Sdes usage(); 22255505Sshin } 22355505Sshin } 22455505Sshin argc -= optind; 22555505Sshin argv += optind; 22655505Sshin 227118959Sume logopt = LOG_NDELAY | LOG_PID; 228118959Sume if (fflag) 229118959Sume logopt |= LOG_PERROR; 230118959Sume openlog("rtadvd", logopt, LOG_DAEMON); 231118959Sume 23255505Sshin /* set log level */ 233225519Shrs if (dflag > 2) 234222732Shrs (void)setlogmask(LOG_UPTO(LOG_DEBUG)); 235225519Shrs else if (dflag > 1) 236225519Shrs (void)setlogmask(LOG_UPTO(LOG_INFO)); 237222732Shrs else if (dflag > 0) 238225519Shrs (void)setlogmask(LOG_UPTO(LOG_NOTICE)); 239222732Shrs else 24055505Sshin (void)setlogmask(LOG_UPTO(LOG_ERR)); 24155505Sshin 24255505Sshin /* timer initialization */ 24355505Sshin rtadvd_timer_init(); 24455505Sshin 245118962Sume#ifndef HAVE_ARC4RANDOM 24655505Sshin /* random value initialization */ 247110668Sache#ifdef __FreeBSD__ 248110668Sache srandomdev(); 249110668Sache#else 250224144Shrs srandom((unsigned long)time(NULL)); 251110668Sache#endif 252118962Sume#endif 253216675Sdelphij pfh = pidfile_open(pidfilename, 0600, &otherpid); 254216675Sdelphij if (pfh == NULL) { 255216675Sdelphij if (errno == EEXIST) 256216675Sdelphij errx(1, "%s already running, pid: %d", 257216675Sdelphij getprogname(), otherpid); 258216675Sdelphij syslog(LOG_ERR, 259225519Shrs "failed to open the pid file %s, run anyway.", 260225519Shrs pidfilename); 261216675Sdelphij } 26255505Sshin if (!fflag) 26355505Sshin daemon(1, 0); 26455505Sshin 265224144Shrs sock_open(&sock); 266118920Sume 267224144Shrs update_ifinfo(&ifilist, UPDATE_IFINFO_ALL); 268224144Shrs for (i = 0; i < argc; i++) 269224144Shrs update_persist_ifinfo(&ifilist, argv[i]); 270224144Shrs 271224144Shrs csock_open(&ctrlsock, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); 272224144Shrs if (ctrlsock.si_fd == -1) { 273225519Shrs syslog(LOG_ERR, "cannot open control socket: %s", 274225519Shrs strerror(errno)); 275224144Shrs exit(1); 276224144Shrs } 277224144Shrs 27862656Skris /* record the current PID */ 27962656Skris pid = getpid(); 280216675Sdelphij pidfile_write(pfh); 28162656Skris 282224144Shrs set[PFD_RAWSOCK].fd = sock.si_fd; 283224144Shrs set[PFD_RAWSOCK].events = POLLIN; 284118916Sume if (sflag == 0) { 285224144Shrs rtsock_open(&rtsock); 286224144Shrs set[PFD_RTSOCK].fd = rtsock.si_fd; 287224144Shrs set[PFD_RTSOCK].events = POLLIN; 288118916Sume } else 289224144Shrs set[PFD_RTSOCK].fd = -1; 290224144Shrs set[PFD_CSOCK].fd = ctrlsock.si_fd; 291224144Shrs set[PFD_CSOCK].events = POLLIN; 292224144Shrs signal(SIGTERM, set_do_shutdown); 293224144Shrs signal(SIGINT, set_do_shutdown); 294224144Shrs signal(SIGHUP, set_do_reload); 29555505Sshin 296224144Shrs error = csock_listen(&ctrlsock); 297224144Shrs if (error) { 298225519Shrs syslog(LOG_ERR, "cannot listen control socket: %s", 299225519Shrs strerror(errno)); 300224144Shrs exit(1); 301118911Sume } 30262656Skris 303224144Shrs /* load configuration file */ 304224144Shrs set_do_reload(0); 305224144Shrs 30655505Sshin while (1) { 307224144Shrs if (is_do_shutdown()) 308224144Shrs rtadvd_shutdown(); 30962656Skris 310224144Shrs if (is_do_reload()) { 311224144Shrs loadconfig_ifname(reload_ifname()); 312224144Shrs if (reload_ifname() == NULL) 313224144Shrs syslog(LOG_INFO, 314224144Shrs "configuration file reloaded."); 315224144Shrs else 316224144Shrs syslog(LOG_INFO, 317224144Shrs "configuration file for %s reloaded.", 318224144Shrs reload_ifname()); 319224144Shrs reset_do_reload(); 32078064Sume } 32178064Sume 322224144Shrs /* timeout handler update for active interfaces */ 323224144Shrs rtadvd_update_timeout_handler(); 324222972Shrs 32555505Sshin /* timer expiration check and reset the timer */ 32655505Sshin timeout = rtadvd_check_timer(); 32755505Sshin 32862656Skris if (timeout != NULL) { 32962656Skris syslog(LOG_DEBUG, 33097712Sume "<%s> set timer to %ld:%ld. waiting for " 331118660Sume "inputs or timeout", __func__, 33297712Sume (long int)timeout->tv_sec, 333253970Shrs (long int)timeout->tv_nsec / 1000); 33462656Skris } else { 33562656Skris syslog(LOG_DEBUG, 33697712Sume "<%s> there's no timer. waiting for inputs", 337118660Sume __func__); 33862656Skris } 339224144Shrs if ((i = poll(set, sizeof(set)/sizeof(set[0]), 340224144Shrs timeout ? (timeout->tv_sec * 1000 + 341253970Shrs timeout->tv_nsec / 1000 / 1000) : INFTIM)) < 0) { 342225519Shrs 343225519Shrs /* EINTR would occur if a signal was delivered */ 34462656Skris if (errno != EINTR) 345225519Shrs syslog(LOG_ERR, "poll() failed: %s", 346225519Shrs strerror(errno)); 34755505Sshin continue; 34855505Sshin } 34955505Sshin if (i == 0) /* timeout */ 35055505Sshin continue; 351224144Shrs if (rtsock.si_fd != -1 && set[PFD_RTSOCK].revents & POLLIN) 352224144Shrs rtmsg_input(&rtsock); 35355505Sshin 354224144Shrs if (set[PFD_RAWSOCK].revents & POLLIN) 355224144Shrs rtadvd_input(&sock); 356222732Shrs 357224144Shrs if (set[PFD_CSOCK].revents & POLLIN) { 358224144Shrs int fd; 359222732Shrs 360224144Shrs fd = csock_accept(&ctrlsock); 361224144Shrs if (fd == -1) 362225519Shrs syslog(LOG_ERR, 363225519Shrs "cannot accept() control socket: %s", 364225519Shrs strerror(errno)); 365224144Shrs else { 366225519Shrs cm_handler_server(fd); 367224144Shrs close(fd); 368224144Shrs } 369224144Shrs } 370224144Shrs } 371224144Shrs exit(0); /* NOTREACHED */ 37262656Skris} 37362656Skris 37462656Skrisstatic void 375224144Shrsrtadvd_shutdown(void) 376222972Shrs{ 377224144Shrs struct ifinfo *ifi; 378224144Shrs struct rainfo *rai; 379224144Shrs struct rdnss *rdn; 380224144Shrs struct dnssl *dns; 381222972Shrs 382224144Shrs if (wait_shutdown) { 383224144Shrs syslog(LOG_INFO, 384225519Shrs "waiting expiration of the all RA timers."); 385222972Shrs 386224144Shrs TAILQ_FOREACH(ifi, &ifilist, ifi_next) { 387225683Shrs /* 388225683Shrs * Ignore !IFF_UP interfaces in waiting for shutdown. 389225683Shrs */ 390225683Shrs if (!(ifi->ifi_flags & IFF_UP) && 391225683Shrs ifi->ifi_ra_timer != NULL) { 392225683Shrs ifi->ifi_state = IFI_STATE_UNCONFIGURED; 393225683Shrs rtadvd_remove_timer(ifi->ifi_ra_timer); 394225683Shrs ifi->ifi_ra_timer = NULL; 395225683Shrs syslog(LOG_DEBUG, "<%s> %s(idx=%d) is down. " 396225683Shrs "Timer removed and marked as UNCONFIGURED.", 397225683Shrs __func__, ifi->ifi_ifname, 398225683Shrs ifi->ifi_ifindex); 399225683Shrs } 400225683Shrs } 401225683Shrs TAILQ_FOREACH(ifi, &ifilist, ifi_next) { 402224144Shrs if (ifi->ifi_ra_timer != NULL) 403224144Shrs break; 404224144Shrs } 405224144Shrs if (ifi == NULL) { 406225519Shrs syslog(LOG_NOTICE, "gracefully terminated."); 407224144Shrs exit(0); 408224144Shrs } 409222732Shrs 410224144Shrs sleep(1); 411224144Shrs return; 412224144Shrs } 41378064Sume 414225519Shrs syslog(LOG_DEBUG, "<%s> cease to be an advertising router", 415222732Shrs __func__); 41662656Skris 417224144Shrs wait_shutdown = 1; 418224144Shrs 419222732Shrs TAILQ_FOREACH(rai, &railist, rai_next) { 420222732Shrs rai->rai_lifetime = 0; 421222732Shrs TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) 422222732Shrs rdn->rd_ltime = 0; 423222732Shrs TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) 424222732Shrs dns->dn_ltime = 0; 42562656Skris } 426224144Shrs TAILQ_FOREACH(ifi, &ifilist, ifi_next) { 427224144Shrs if (!ifi->ifi_persist) 428224144Shrs continue; 429224144Shrs if (ifi->ifi_state == IFI_STATE_UNCONFIGURED) 430224144Shrs continue; 431224144Shrs if (ifi->ifi_ra_timer == NULL) 432224144Shrs continue; 433225519Shrs if (ifi->ifi_ra_lastsent.tv_sec == 0 && 434253970Shrs ifi->ifi_ra_lastsent.tv_nsec == 0 && 435225519Shrs ifi->ifi_ra_timer != NULL) { 436225519Shrs /* 437225519Shrs * When RA configured but never sent, 438225519Shrs * ignore the IF immediately. 439225519Shrs */ 440225519Shrs rtadvd_remove_timer(ifi->ifi_ra_timer); 441225519Shrs ifi->ifi_ra_timer = NULL; 442225519Shrs ifi->ifi_state = IFI_STATE_UNCONFIGURED; 443225519Shrs continue; 444225519Shrs } 445224144Shrs 446224144Shrs ifi->ifi_state = IFI_STATE_TRANSITIVE; 447224144Shrs 448224144Shrs /* Mark as the shut-down state. */ 449224144Shrs ifi->ifi_rainfo_trans = ifi->ifi_rainfo; 450224144Shrs ifi->ifi_rainfo = NULL; 451224144Shrs 452224144Shrs ifi->ifi_burstcount = MAX_FINAL_RTR_ADVERTISEMENTS; 453224144Shrs ifi->ifi_burstinterval = MIN_DELAY_BETWEEN_RAS; 454224144Shrs 455224144Shrs ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm); 456224144Shrs rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm, 457224144Shrs ifi->ifi_ra_timer); 45862656Skris } 459225519Shrs syslog(LOG_NOTICE, "final RA transmission started."); 460224144Shrs 461216675Sdelphij pidfile_remove(pfh); 462224144Shrs csock_close(&ctrlsock); 46362656Skris} 46462656Skris 46562656Skrisstatic void 466224144Shrsrtmsg_input(struct sockinfo *s) 46755505Sshin{ 46862656Skris int n, type, ifindex = 0, plen; 46955505Sshin size_t len; 47055505Sshin char msg[2048], *next, *lim; 471224144Shrs char ifname[IFNAMSIZ]; 472222732Shrs struct if_announcemsghdr *ifan; 473224144Shrs struct rt_msghdr *rtm; 474222732Shrs struct prefix *pfx; 47555505Sshin struct rainfo *rai; 47655505Sshin struct in6_addr *addr; 477224144Shrs struct ifinfo *ifi; 47855505Sshin char addrbuf[INET6_ADDRSTRLEN]; 479118968Sume int prefixchange = 0; 48055505Sshin 481224144Shrs if (s == NULL) { 482224144Shrs syslog(LOG_ERR, "<%s> internal error", __func__); 483224144Shrs exit(1); 484224144Shrs } 485224144Shrs n = read(s->si_fd, msg, sizeof(msg)); 486224144Shrs rtm = (struct rt_msghdr *)msg; 487222732Shrs syslog(LOG_DEBUG, "<%s> received a routing message " 488224144Shrs "(type = %d, len = %d)", __func__, rtm->rtm_type, n); 489222732Shrs 490224144Shrs if (n > rtm->rtm_msglen) { 49155505Sshin /* 492222732Shrs * This usually won't happen for messages received on 49362656Skris * a routing socket. 49455505Sshin */ 495222732Shrs syslog(LOG_DEBUG, 496222732Shrs "<%s> received data length is larger than " 497222732Shrs "1st routing message len. multiple messages? " 498222732Shrs "read %d bytes, but 1st msg len = %d", 499224144Shrs __func__, n, rtm->rtm_msglen); 50062656Skris#if 0 50162656Skris /* adjust length */ 502224144Shrs n = rtm->rtm_msglen; 50362656Skris#endif 50455505Sshin } 50555505Sshin 50655505Sshin lim = msg + n; 50755505Sshin for (next = msg; next < lim; next += len) { 50862656Skris int oldifflags; 50962656Skris 51055505Sshin next = get_next_msg(next, lim, 0, &len, 511222732Shrs RTADV_TYPE2BITMASK(RTM_ADD) | 512222732Shrs RTADV_TYPE2BITMASK(RTM_DELETE) | 513222732Shrs RTADV_TYPE2BITMASK(RTM_NEWADDR) | 514222732Shrs RTADV_TYPE2BITMASK(RTM_DELADDR) | 515222732Shrs RTADV_TYPE2BITMASK(RTM_IFINFO) | 516222732Shrs RTADV_TYPE2BITMASK(RTM_IFANNOUNCE)); 51755505Sshin if (len == 0) 51855505Sshin break; 519224144Shrs type = ((struct rt_msghdr *)next)->rtm_type; 52055505Sshin switch (type) { 52155505Sshin case RTM_ADD: 52255505Sshin case RTM_DELETE: 52355505Sshin ifindex = get_rtm_ifindex(next); 52455505Sshin break; 52555505Sshin case RTM_NEWADDR: 52655505Sshin case RTM_DELADDR: 527224144Shrs ifindex = (int)((struct ifa_msghdr *)next)->ifam_index; 52855505Sshin break; 52955505Sshin case RTM_IFINFO: 530224144Shrs ifindex = (int)((struct if_msghdr *)next)->ifm_index; 53155505Sshin break; 532222732Shrs case RTM_IFANNOUNCE: 533222732Shrs ifan = (struct if_announcemsghdr *)next; 534222732Shrs switch (ifan->ifan_what) { 535222732Shrs case IFAN_ARRIVAL: 536222732Shrs case IFAN_DEPARTURE: 537222732Shrs break; 538222732Shrs default: 53955505Sshin syslog(LOG_DEBUG, 540222732Shrs "<%s:%d> unknown ifan msg (ifan_what=%d)", 541222732Shrs __func__, __LINE__, ifan->ifan_what); 542222732Shrs continue; 54355505Sshin } 544222732Shrs 545225519Shrs syslog(LOG_DEBUG, "<%s>: if_announcemsg (idx=%d:%d)", 546222732Shrs __func__, ifan->ifan_index, ifan->ifan_what); 547222732Shrs switch (ifan->ifan_what) { 548222732Shrs case IFAN_ARRIVAL: 549225519Shrs syslog(LOG_NOTICE, 550225519Shrs "interface added (idx=%d)", 551225519Shrs ifan->ifan_index); 552224144Shrs update_ifinfo(&ifilist, ifan->ifan_index); 553224144Shrs loadconfig_index(ifan->ifan_index); 554222732Shrs break; 555222732Shrs case IFAN_DEPARTURE: 556225519Shrs syslog(LOG_NOTICE, 557225519Shrs "interface removed (idx=%d)", 558225519Shrs ifan->ifan_index); 559224144Shrs rm_ifinfo_index(ifan->ifan_index); 560224144Shrs 561224144Shrs /* Clear ifi_ifindex */ 562224144Shrs TAILQ_FOREACH(ifi, &ifilist, ifi_next) { 563224144Shrs if (ifi->ifi_ifindex 564224144Shrs == ifan->ifan_index) { 565224144Shrs ifi->ifi_ifindex = 0; 566224144Shrs break; 567224144Shrs } 568224144Shrs } 569224144Shrs update_ifinfo(&ifilist, ifan->ifan_index); 570222732Shrs break; 571222732Shrs } 57262656Skris continue; 573222732Shrs default: 574222732Shrs /* should not reach here */ 575222732Shrs syslog(LOG_DEBUG, 576222732Shrs "<%s:%d> unknown rtmsg %d on %s", 577222732Shrs __func__, __LINE__, type, 578222732Shrs if_indextoname(ifindex, ifname)); 579222732Shrs continue; 58055505Sshin } 581224144Shrs ifi = if_indextoifinfo(ifindex); 582224144Shrs if (ifi == NULL) { 583222732Shrs syslog(LOG_DEBUG, 584224144Shrs "<%s> ifinfo not found for idx=%d. Why?", 585224144Shrs __func__, ifindex); 58662656Skris continue; 58755505Sshin } 588224144Shrs rai = ifi->ifi_rainfo; 589224144Shrs if (rai == NULL) { 590224144Shrs syslog(LOG_DEBUG, 591224144Shrs "<%s> route changed on " 592224144Shrs "non advertising interface(%s)", 593224144Shrs __func__, ifi->ifi_ifname); 594224144Shrs continue; 595224144Shrs } 59655505Sshin 597224144Shrs oldifflags = ifi->ifi_flags; 598224144Shrs /* init ifflags because it may have changed */ 599224144Shrs update_ifinfo(&ifilist, ifindex); 600224144Shrs 60197712Sume switch (type) { 60297712Sume case RTM_ADD: 60397712Sume if (sflag) 60497712Sume break; /* we aren't interested in prefixes */ 60562656Skris 60697712Sume addr = get_addr(msg); 60797712Sume plen = get_prefixlen(msg); 60897712Sume /* sanity check for plen */ 60997712Sume /* as RFC2373, prefixlen is at least 4 */ 61097712Sume if (plen < 4 || plen > 127) { 61155505Sshin syslog(LOG_INFO, "<%s> new interface route's" 61297712Sume "plen %d is invalid for a prefix", 613118660Sume __func__, plen); 61462656Skris break; 61597712Sume } 616222732Shrs pfx = find_prefix(rai, addr, plen); 617222732Shrs if (pfx) { 618222732Shrs if (pfx->pfx_timer) { 61998172Sume /* 62098172Sume * If the prefix has been invalidated, 62198172Sume * make it available again. 62298172Sume */ 623222732Shrs update_prefix(pfx); 624118968Sume prefixchange = 1; 625222732Shrs } else 62697712Sume syslog(LOG_DEBUG, 62797712Sume "<%s> new prefix(%s/%d) " 62897712Sume "added on %s, " 62997712Sume "but it was already in list", 630118660Sume __func__, 63197712Sume inet_ntop(AF_INET6, addr, 632222732Shrs (char *)addrbuf, 633222732Shrs sizeof(addrbuf)), 634224144Shrs plen, ifi->ifi_ifname); 63597712Sume break; 63697712Sume } 63797712Sume make_prefix(rai, ifindex, addr, plen); 638118968Sume prefixchange = 1; 63997712Sume break; 64097712Sume case RTM_DELETE: 64197712Sume if (sflag) 64297712Sume break; 64362656Skris 64497712Sume addr = get_addr(msg); 64597712Sume plen = get_prefixlen(msg); 64697712Sume /* sanity check for plen */ 64797712Sume /* as RFC2373, prefixlen is at least 4 */ 64897712Sume if (plen < 4 || plen > 127) { 64997712Sume syslog(LOG_INFO, 65097712Sume "<%s> deleted interface route's " 65197712Sume "plen %d is invalid for a prefix", 652118660Sume __func__, plen); 65362656Skris break; 65497712Sume } 655222732Shrs pfx = find_prefix(rai, addr, plen); 656222732Shrs if (pfx == NULL) { 657222732Shrs syslog(LOG_DEBUG, 658222732Shrs "<%s> prefix(%s/%d) was deleted on %s, " 659222732Shrs "but it was not in list", 660222732Shrs __func__, inet_ntop(AF_INET6, addr, 661222732Shrs (char *)addrbuf, sizeof(addrbuf)), 662224144Shrs plen, ifi->ifi_ifname); 66397712Sume break; 66497712Sume } 665222732Shrs invalidate_prefix(pfx); 666118968Sume prefixchange = 1; 66797712Sume break; 66855505Sshin case RTM_NEWADDR: 66955505Sshin case RTM_DELADDR: 67055505Sshin case RTM_IFINFO: 67197712Sume break; 67255505Sshin default: 67355505Sshin /* should not reach here */ 674222732Shrs syslog(LOG_DEBUG, 675222732Shrs "<%s:%d> unknown rtmsg %d on %s", 676222732Shrs __func__, __LINE__, type, 677222732Shrs if_indextoname(ifindex, ifname)); 67855505Sshin return; 67955505Sshin } 68062656Skris 68162656Skris /* check if an interface flag is changed */ 682118664Sume if ((oldifflags & IFF_UP) && /* UP to DOWN */ 683224144Shrs !(ifi->ifi_flags & IFF_UP)) { 684225519Shrs syslog(LOG_NOTICE, 685225519Shrs "<interface %s becomes down. stop timer.", 686225519Shrs ifi->ifi_ifname); 687224144Shrs rtadvd_remove_timer(ifi->ifi_ra_timer); 688224144Shrs ifi->ifi_ra_timer = NULL; 689118664Sume } else if (!(oldifflags & IFF_UP) && /* DOWN to UP */ 690224144Shrs (ifi->ifi_flags & IFF_UP)) { 691225519Shrs syslog(LOG_NOTICE, 692225519Shrs "interface %s becomes up. restart timer.", 693225519Shrs ifi->ifi_ifname); 69462656Skris 695224144Shrs ifi->ifi_state = IFI_STATE_TRANSITIVE; 696224144Shrs ifi->ifi_burstcount = 697224144Shrs MAX_INITIAL_RTR_ADVERTISEMENTS; 698224144Shrs ifi->ifi_burstinterval = 699224144Shrs MAX_INITIAL_RTR_ADVERT_INTERVAL; 700224144Shrs 701224144Shrs ifi->ifi_ra_timer = rtadvd_add_timer(ra_timeout, 702224144Shrs ra_timer_update, ifi, ifi); 703224144Shrs ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm); 704224144Shrs rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm, 705224144Shrs ifi->ifi_ra_timer); 706118968Sume } else if (prefixchange && 707224144Shrs (ifi->ifi_flags & IFF_UP)) { 708118968Sume /* 709118968Sume * An advertised prefix has been added or invalidated. 710118968Sume * Will notice the change in a short delay. 711118968Sume */ 712224144Shrs set_short_delay(ifi); 71362656Skris } 71455505Sshin } 71555505Sshin 71655505Sshin return; 71755505Sshin} 71855505Sshin 71955505Sshinvoid 720224144Shrsrtadvd_input(struct sockinfo *s) 72155505Sshin{ 722222732Shrs ssize_t i; 72355505Sshin int *hlimp = NULL; 72462656Skris#ifdef OLDRAWSOCKET 72562656Skris struct ip6_hdr *ip; 726222732Shrs#endif 72755505Sshin struct icmp6_hdr *icp; 72855505Sshin int ifindex = 0; 72955505Sshin struct cmsghdr *cm; 73055505Sshin struct in6_pktinfo *pi = NULL; 731224144Shrs char ntopbuf[INET6_ADDRSTRLEN], ifnamebuf[IFNAMSIZ]; 73255505Sshin struct in6_addr dst = in6addr_any; 733224144Shrs struct ifinfo *ifi; 73455505Sshin 735224144Shrs syslog(LOG_DEBUG, "<%s> enter", __func__); 736224144Shrs 737224144Shrs if (s == NULL) { 738224144Shrs syslog(LOG_ERR, "<%s> internal error", __func__); 739224144Shrs exit(1); 740224144Shrs } 74155505Sshin /* 74255505Sshin * Get message. We reset msg_controllen since the field could 74355505Sshin * be modified if we had received a message before setting 74455505Sshin * receive options. 74555505Sshin */ 74662656Skris rcvmhdr.msg_controllen = rcvcmsgbuflen; 747224144Shrs if ((i = recvmsg(s->si_fd, &rcvmhdr, 0)) < 0) 74855505Sshin return; 74955505Sshin 75055505Sshin /* extract optional information via Advanced API */ 75155505Sshin for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&rcvmhdr); 75255505Sshin cm; 75355505Sshin cm = (struct cmsghdr *)CMSG_NXTHDR(&rcvmhdr, cm)) { 75455505Sshin if (cm->cmsg_level == IPPROTO_IPV6 && 75555505Sshin cm->cmsg_type == IPV6_PKTINFO && 75655505Sshin cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) { 75755505Sshin pi = (struct in6_pktinfo *)(CMSG_DATA(cm)); 75855505Sshin ifindex = pi->ipi6_ifindex; 75955505Sshin dst = pi->ipi6_addr; 76055505Sshin } 76155505Sshin if (cm->cmsg_level == IPPROTO_IPV6 && 76255505Sshin cm->cmsg_type == IPV6_HOPLIMIT && 76355505Sshin cm->cmsg_len == CMSG_LEN(sizeof(int))) 76455505Sshin hlimp = (int *)CMSG_DATA(cm); 76555505Sshin } 76655505Sshin if (ifindex == 0) { 767225519Shrs syslog(LOG_ERR, "failed to get receiving interface"); 76855505Sshin return; 76955505Sshin } 77055505Sshin if (hlimp == NULL) { 771225519Shrs syslog(LOG_ERR, "failed to get receiving hop limit"); 77255505Sshin return; 77355505Sshin } 77455505Sshin 77562656Skris /* 776219184Sbz * If we happen to receive data on an interface which is now gone 777219184Sbz * or down, just discard the data. 77862656Skris */ 779224144Shrs ifi = if_indextoifinfo(pi->ipi6_ifindex); 780224144Shrs if (ifi == NULL || !(ifi->ifi_flags & IFF_UP)) { 78162656Skris syslog(LOG_INFO, 782222732Shrs "<%s> received data on a disabled interface (%s)", 783222732Shrs __func__, 784224144Shrs (ifi == NULL) ? "[gone]" : ifi->ifi_ifname); 78562656Skris return; 78662656Skris } 78762656Skris 78862656Skris#ifdef OLDRAWSOCKET 789222732Shrs if ((size_t)i < sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr)) { 79062656Skris syslog(LOG_ERR, 791225519Shrs "packet size(%d) is too short", i); 79262656Skris return; 79362656Skris } 79462656Skris 79562656Skris ip = (struct ip6_hdr *)rcvmhdr.msg_iov[0].iov_base; 79662656Skris icp = (struct icmp6_hdr *)(ip + 1); /* XXX: ext. hdr? */ 79762656Skris#else 798222732Shrs if ((size_t)i < sizeof(struct icmp6_hdr)) { 799225519Shrs syslog(LOG_ERR, "packet size(%zd) is too short", i); 80055505Sshin return; 80155505Sshin } 80255505Sshin 80355505Sshin icp = (struct icmp6_hdr *)rcvmhdr.msg_iov[0].iov_base; 80462656Skris#endif 80555505Sshin 80697712Sume switch (icp->icmp6_type) { 80797712Sume case ND_ROUTER_SOLICIT: 80897712Sume /* 809222732Shrs * Message verification - RFC 4861 6.1.1 81097712Sume * XXX: these checks must be done in the kernel as well, 81197712Sume * but we can't completely rely on them. 81297712Sume */ 81397712Sume if (*hlimp != 255) { 81497712Sume syslog(LOG_NOTICE, 815225519Shrs "RS with invalid hop limit(%d) " 81697712Sume "received from %s on %s", 817225519Shrs *hlimp, 818118913Sume inet_ntop(AF_INET6, &rcvfrom.sin6_addr, ntopbuf, 819222732Shrs sizeof(ntopbuf)), 82097712Sume if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 82197712Sume return; 82297712Sume } 82397712Sume if (icp->icmp6_code) { 82497712Sume syslog(LOG_NOTICE, 825225519Shrs "RS with invalid ICMP6 code(%d) " 82697712Sume "received from %s on %s", 827225519Shrs icp->icmp6_code, 828118913Sume inet_ntop(AF_INET6, &rcvfrom.sin6_addr, ntopbuf, 829222732Shrs sizeof(ntopbuf)), 83097712Sume if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 83197712Sume return; 83297712Sume } 833222732Shrs if ((size_t)i < sizeof(struct nd_router_solicit)) { 83497712Sume syslog(LOG_NOTICE, 835225519Shrs "RS from %s on %s does not have enough " 836222743Shrs "length (len = %zd)", 837118913Sume inet_ntop(AF_INET6, &rcvfrom.sin6_addr, ntopbuf, 838222732Shrs sizeof(ntopbuf)), 83997712Sume if_indextoname(pi->ipi6_ifindex, ifnamebuf), i); 84097712Sume return; 84197712Sume } 842118913Sume rs_input(i, (struct nd_router_solicit *)icp, pi, &rcvfrom); 84397712Sume break; 84497712Sume case ND_ROUTER_ADVERT: 84597712Sume /* 846222732Shrs * Message verification - RFC 4861 6.1.2 847222732Shrs * XXX: there's the same dilemma as above... 84897712Sume */ 849222732Shrs if (!IN6_IS_ADDR_LINKLOCAL(&rcvfrom.sin6_addr)) { 850222732Shrs syslog(LOG_NOTICE, 851228990Suqs "RA with non-linklocal source address " 852222732Shrs "received from %s on %s", 853225519Shrs inet_ntop(AF_INET6, &rcvfrom.sin6_addr, 854222732Shrs ntopbuf, sizeof(ntopbuf)), 855222732Shrs if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 856222732Shrs return; 857222732Shrs } 85897712Sume if (*hlimp != 255) { 85997712Sume syslog(LOG_NOTICE, 860225519Shrs "RA with invalid hop limit(%d) " 86197712Sume "received from %s on %s", 862225519Shrs *hlimp, 863118913Sume inet_ntop(AF_INET6, &rcvfrom.sin6_addr, ntopbuf, 864222732Shrs sizeof(ntopbuf)), 86597712Sume if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 86697712Sume return; 86797712Sume } 86897712Sume if (icp->icmp6_code) { 86997712Sume syslog(LOG_NOTICE, 870225519Shrs "RA with invalid ICMP6 code(%d) " 87197712Sume "received from %s on %s", 872225519Shrs icp->icmp6_code, 873118913Sume inet_ntop(AF_INET6, &rcvfrom.sin6_addr, ntopbuf, 874222732Shrs sizeof(ntopbuf)), 87597712Sume if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 87697712Sume return; 87797712Sume } 878222732Shrs if ((size_t)i < sizeof(struct nd_router_advert)) { 87997712Sume syslog(LOG_NOTICE, 880225519Shrs "RA from %s on %s does not have enough " 881222743Shrs "length (len = %zd)", 882118913Sume inet_ntop(AF_INET6, &rcvfrom.sin6_addr, ntopbuf, 883222732Shrs sizeof(ntopbuf)), 88497712Sume if_indextoname(pi->ipi6_ifindex, ifnamebuf), i); 88597712Sume return; 88697712Sume } 887118913Sume ra_input(i, (struct nd_router_advert *)icp, pi, &rcvfrom); 88897712Sume break; 88997712Sume case ICMP6_ROUTER_RENUMBERING: 890224144Shrs if (mcastif == NULL) { 891225519Shrs syslog(LOG_ERR, "received a router renumbering " 892225519Shrs "message, but not allowed to be accepted"); 89397712Sume break; 89497712Sume } 895118913Sume rr_input(i, (struct icmp6_router_renum *)icp, pi, &rcvfrom, 896222732Shrs &dst); 89797712Sume break; 89897712Sume default: 89997712Sume /* 90097712Sume * Note that this case is POSSIBLE, especially just 90197712Sume * after invocation of the daemon. This is because we 90297712Sume * could receive message after opening the socket and 90397712Sume * before setting ICMP6 type filter(see sock_open()). 90497712Sume */ 905225519Shrs syslog(LOG_ERR, "invalid icmp type(%d)", icp->icmp6_type); 90697712Sume return; 90755505Sshin } 90855505Sshin 90955505Sshin return; 91055505Sshin} 91155505Sshin 91255505Sshinstatic void 91355505Sshinrs_input(int len, struct nd_router_solicit *rs, 91455505Sshin struct in6_pktinfo *pi, struct sockaddr_in6 *from) 91555505Sshin{ 916224144Shrs char ntopbuf[INET6_ADDRSTRLEN]; 917224144Shrs char ifnamebuf[IFNAMSIZ]; 918222732Shrs union nd_opt ndopts; 919222732Shrs struct rainfo *rai; 920224144Shrs struct ifinfo *ifi; 921118968Sume struct soliciter *sol; 92255505Sshin 92355505Sshin syslog(LOG_DEBUG, 924222732Shrs "<%s> RS received from %s on %s", 925222732Shrs __func__, 926222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, sizeof(ntopbuf)), 927222732Shrs if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 92855505Sshin 92955505Sshin /* ND option check */ 93055505Sshin memset(&ndopts, 0, sizeof(ndopts)); 931225519Shrs TAILQ_INIT(&ndopts.opt_list); 93255505Sshin if (nd6_options((struct nd_opt_hdr *)(rs + 1), 93355505Sshin len - sizeof(struct nd_router_solicit), 934118664Sume &ndopts, NDOPT_FLAG_SRCLINKADDR)) { 935151470Ssuz syslog(LOG_INFO, 936222732Shrs "<%s> ND option check failed for an RS from %s on %s", 937222732Shrs __func__, 938222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 939222732Shrs sizeof(ntopbuf)), 940222732Shrs if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 94155505Sshin return; 94255505Sshin } 94355505Sshin 94455505Sshin /* 94555505Sshin * If the IP source address is the unspecified address, there 94655505Sshin * must be no source link-layer address option in the message. 947222732Shrs * (RFC 4861 6.1.1) 94855505Sshin */ 94955505Sshin if (IN6_IS_ADDR_UNSPECIFIED(&from->sin6_addr) && 950222732Shrs ndopts.opt_src_lladdr) { 951151470Ssuz syslog(LOG_INFO, 952222732Shrs "<%s> RS from unspecified src on %s has a link-layer" 953222732Shrs " address option", 954222732Shrs __func__, if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 95555505Sshin goto done; 95655505Sshin } 95755505Sshin 958224144Shrs ifi = if_indextoifinfo(pi->ipi6_ifindex); 959224144Shrs if (ifi == NULL) { 960224144Shrs syslog(LOG_INFO, 961224144Shrs "<%s> if (idx=%d) not found. Why?", 962224144Shrs __func__, pi->ipi6_ifindex); 963224144Shrs goto done; 964224144Shrs } 965224144Shrs rai = ifi->ifi_rainfo; 966222732Shrs if (rai == NULL) { 96755505Sshin syslog(LOG_INFO, 96855505Sshin "<%s> RS received on non advertising interface(%s)", 969118660Sume __func__, 97055505Sshin if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 97155505Sshin goto done; 97255505Sshin } 97355505Sshin 974224144Shrs rai->rai_ifinfo->ifi_rsinput++; 97562656Skris 97655505Sshin /* 97755505Sshin * Decide whether to send RA according to the rate-limit 97855505Sshin * consideration. 97955505Sshin */ 98055505Sshin 981118968Sume /* record sockaddr waiting for RA, if possible */ 982118968Sume sol = (struct soliciter *)malloc(sizeof(*sol)); 983118968Sume if (sol) { 984222732Shrs sol->sol_addr = *from; 985222732Shrs /* XXX RFC 2553 need clarification on flowinfo */ 986222732Shrs sol->sol_addr.sin6_flowinfo = 0; 987222732Shrs TAILQ_INSERT_TAIL(&rai->rai_soliciter, sol, sol_next); 988118968Sume } 98962656Skris 990118968Sume /* 991118968Sume * If there is already a waiting RS packet, don't 992118968Sume * update the timer. 993118968Sume */ 994224144Shrs if (ifi->ifi_rs_waitcount++) 995118968Sume goto done; 99655505Sshin 997224144Shrs set_short_delay(ifi); 99855505Sshin 99955505Sshin done: 100055505Sshin free_ndopts(&ndopts); 100155505Sshin return; 100255505Sshin} 100355505Sshin 100455505Sshinstatic void 1005224144Shrsset_short_delay(struct ifinfo *ifi) 1006118968Sume{ 1007118968Sume long delay; /* must not be greater than 1000000 */ 1008253970Shrs struct timespec interval, now, min_delay, tm_tmp, *rest; 1009118968Sume 1010247863Shrs if (ifi->ifi_ra_timer == NULL) 1011247863Shrs return; 1012118968Sume /* 1013118968Sume * Compute a random delay. If the computed value 1014118968Sume * corresponds to a time later than the time the next 1015118968Sume * multicast RA is scheduled to be sent, ignore the random 1016118968Sume * delay and send the advertisement at the 1017222732Shrs * already-scheduled time. RFC 4861 6.2.6 1018118968Sume */ 1019118968Sume#ifdef HAVE_ARC4RANDOM 1020180823Sache delay = arc4random_uniform(MAX_RA_DELAY_TIME); 1021118968Sume#else 1022118968Sume delay = random() % MAX_RA_DELAY_TIME; 1023118968Sume#endif 1024118968Sume interval.tv_sec = 0; 1025253970Shrs interval.tv_nsec = delay * 1000; 1026224144Shrs rest = rtadvd_timer_rest(ifi->ifi_ra_timer); 1027253970Shrs if (TS_CMP(rest, &interval, <)) { 1028118968Sume syslog(LOG_DEBUG, "<%s> random delay is larger than " 1029118968Sume "the rest of the current timer", __func__); 1030118968Sume interval = *rest; 1031118968Sume } 1032118968Sume 1033118968Sume /* 1034118968Sume * If we sent a multicast Router Advertisement within 1035118968Sume * the last MIN_DELAY_BETWEEN_RAS seconds, schedule 1036118968Sume * the advertisement to be sent at a time corresponding to 1037118968Sume * MIN_DELAY_BETWEEN_RAS plus the random value after the 1038118968Sume * previous advertisement was sent. 1039118968Sume */ 1040253970Shrs clock_gettime(CLOCK_MONOTONIC_FAST, &now); 1041253970Shrs TS_SUB(&now, &ifi->ifi_ra_lastsent, &tm_tmp); 1042118968Sume min_delay.tv_sec = MIN_DELAY_BETWEEN_RAS; 1043253970Shrs min_delay.tv_nsec = 0; 1044253970Shrs if (TS_CMP(&tm_tmp, &min_delay, <)) { 1045253970Shrs TS_SUB(&min_delay, &tm_tmp, &min_delay); 1046253970Shrs TS_ADD(&min_delay, &interval, &interval); 1047118968Sume } 1048224144Shrs rtadvd_set_timer(&interval, ifi->ifi_ra_timer); 1049118968Sume} 1050118968Sume 1051222732Shrsstatic int 1052222732Shrscheck_accept_rtadv(int idx) 1053222732Shrs{ 1054224144Shrs struct ifinfo *ifi; 1055222732Shrs 1056224144Shrs TAILQ_FOREACH(ifi, &ifilist, ifi_next) { 1057224144Shrs if (ifi->ifi_ifindex == idx) 1058224144Shrs break; 1059224144Shrs } 1060224144Shrs if (ifi == NULL) { 1061225519Shrs syslog(LOG_DEBUG, 1062224144Shrs "<%s> if (idx=%d) not found. Why?", 1063222732Shrs __func__, idx); 1064222732Shrs return (0); 1065222732Shrs } 1066224144Shrs#if (__FreeBSD_version < 900000) 1067224144Shrs /* 1068224144Shrs * RA_RECV: !ip6.forwarding && ip6.accept_rtadv 1069224144Shrs * RA_SEND: ip6.forwarding 1070224144Shrs */ 1071224144Shrs return ((getinet6sysctl(IPV6CTL_FORWARDING) == 0) && 1072224144Shrs (getinet6sysctl(IPV6CTL_ACCEPT_RTADV) == 1)); 1073224144Shrs#else 1074224144Shrs /* 1075224144Shrs * RA_RECV: ND6_IFF_ACCEPT_RTADV 1076224144Shrs * RA_SEND: ip6.forwarding 1077224144Shrs */ 1078224144Shrs if (update_ifinfo_nd_flags(ifi) != 0) { 1079225519Shrs syslog(LOG_ERR, "cannot get nd6 flags (idx=%d)", idx); 1080222732Shrs return (0); 1081222732Shrs } 1082222732Shrs 1083224144Shrs return (ifi->ifi_nd_flags & ND6_IFF_ACCEPT_RTADV); 1084224144Shrs#endif 1085222732Shrs} 1086222732Shrs 1087118968Sumestatic void 1088222732Shrsra_input(int len, struct nd_router_advert *nra, 108955505Sshin struct in6_pktinfo *pi, struct sockaddr_in6 *from) 109055505Sshin{ 109155505Sshin struct rainfo *rai; 1092224144Shrs struct ifinfo *ifi; 1093224144Shrs char ntopbuf[INET6_ADDRSTRLEN]; 1094224144Shrs char ifnamebuf[IFNAMSIZ]; 1095222732Shrs union nd_opt ndopts; 1096222732Shrs const char *on_off[] = {"OFF", "ON"}; 1097224144Shrs uint32_t reachabletime, retranstimer, mtu; 109862656Skris int inconsistent = 0; 1099222732Shrs int error; 110055505Sshin 1101222732Shrs syslog(LOG_DEBUG, "<%s> RA received from %s on %s", __func__, 1102222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, sizeof(ntopbuf)), 1103222732Shrs if_indextoname(pi->ipi6_ifindex, ifnamebuf)); 1104222732Shrs 110555505Sshin /* ND option check */ 110655505Sshin memset(&ndopts, 0, sizeof(ndopts)); 1107225519Shrs TAILQ_INIT(&ndopts.opt_list); 1108222732Shrs error = nd6_options((struct nd_opt_hdr *)(nra + 1), 1109222732Shrs len - sizeof(struct nd_router_advert), &ndopts, 1110222732Shrs NDOPT_FLAG_SRCLINKADDR | NDOPT_FLAG_PREFIXINFO | NDOPT_FLAG_MTU | 1111222732Shrs NDOPT_FLAG_RDNSS | NDOPT_FLAG_DNSSL); 1112222732Shrs if (error) { 1113151470Ssuz syslog(LOG_INFO, 1114222732Shrs "<%s> ND option check failed for an RA from %s on %s", 1115222732Shrs __func__, 1116222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1117222732Shrs sizeof(ntopbuf)), if_indextoname(pi->ipi6_ifindex, 1118222732Shrs ifnamebuf)); 111955505Sshin return; 112055505Sshin } 112155505Sshin 112255505Sshin /* 1123222732Shrs * RA consistency check according to RFC 4861 6.2.7 112455505Sshin */ 1125224144Shrs ifi = if_indextoifinfo(pi->ipi6_ifindex); 1126224144Shrs if (ifi->ifi_rainfo == NULL) { 112755505Sshin syslog(LOG_INFO, 1128222732Shrs "<%s> received RA from %s on non-advertising" 1129222732Shrs " interface(%s)", 1130222732Shrs __func__, 1131222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1132222732Shrs sizeof(ntopbuf)), if_indextoname(pi->ipi6_ifindex, 1133222732Shrs ifnamebuf)); 113455505Sshin goto done; 113555505Sshin } 1136224144Shrs rai = ifi->ifi_rainfo; 1137224144Shrs ifi->ifi_rainput++; 1138225519Shrs syslog(LOG_DEBUG, "<%s> ifi->ifi_rainput = %" PRIu64, __func__, 1139224144Shrs ifi->ifi_rainput); 1140222732Shrs 114155505Sshin /* Cur Hop Limit value */ 1142222732Shrs if (nra->nd_ra_curhoplimit && rai->rai_hoplimit && 1143222732Shrs nra->nd_ra_curhoplimit != rai->rai_hoplimit) { 1144225519Shrs syslog(LOG_NOTICE, 1145225519Shrs "CurHopLimit inconsistent on %s:" 1146222732Shrs " %d from %s, %d from us", 1147225519Shrs ifi->ifi_ifname, nra->nd_ra_curhoplimit, 1148222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1149222732Shrs sizeof(ntopbuf)), rai->rai_hoplimit); 115062656Skris inconsistent++; 115155505Sshin } 115255505Sshin /* M flag */ 1153222732Shrs if ((nra->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED) != 1154222732Shrs rai->rai_managedflg) { 1155225519Shrs syslog(LOG_NOTICE, 1156225519Shrs "M flag inconsistent on %s:" 1157222732Shrs " %s from %s, %s from us", 1158225519Shrs ifi->ifi_ifname, on_off[!rai->rai_managedflg], 1159222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1160222732Shrs sizeof(ntopbuf)), on_off[rai->rai_managedflg]); 116162656Skris inconsistent++; 116255505Sshin } 116355505Sshin /* O flag */ 1164222732Shrs if ((nra->nd_ra_flags_reserved & ND_RA_FLAG_OTHER) != 1165222732Shrs rai->rai_otherflg) { 1166225519Shrs syslog(LOG_NOTICE, 1167225519Shrs "O flag inconsistent on %s:" 1168222732Shrs " %s from %s, %s from us", 1169225519Shrs ifi->ifi_ifname, on_off[!rai->rai_otherflg], 1170222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1171222732Shrs sizeof(ntopbuf)), on_off[rai->rai_otherflg]); 117262656Skris inconsistent++; 117355505Sshin } 117455505Sshin /* Reachable Time */ 1175222732Shrs reachabletime = ntohl(nra->nd_ra_reachable); 1176222732Shrs if (reachabletime && rai->rai_reachabletime && 1177222732Shrs reachabletime != rai->rai_reachabletime) { 1178225519Shrs syslog(LOG_NOTICE, 1179225519Shrs "ReachableTime inconsistent on %s:" 1180222732Shrs " %d from %s, %d from us", 1181225519Shrs ifi->ifi_ifname, reachabletime, 1182222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1183222732Shrs sizeof(ntopbuf)), rai->rai_reachabletime); 118462656Skris inconsistent++; 118555505Sshin } 118655505Sshin /* Retrans Timer */ 1187222732Shrs retranstimer = ntohl(nra->nd_ra_retransmit); 1188222732Shrs if (retranstimer && rai->rai_retranstimer && 1189222732Shrs retranstimer != rai->rai_retranstimer) { 1190225519Shrs syslog(LOG_NOTICE, 1191225519Shrs "RetranceTimer inconsistent on %s:" 1192222732Shrs " %d from %s, %d from us", 1193225519Shrs ifi->ifi_ifname, retranstimer, 1194222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1195222732Shrs sizeof(ntopbuf)), rai->rai_retranstimer); 119662656Skris inconsistent++; 119755505Sshin } 119855505Sshin /* Values in the MTU options */ 1199222732Shrs if (ndopts.opt_mtu) { 1200222732Shrs mtu = ntohl(ndopts.opt_mtu->nd_opt_mtu_mtu); 1201222732Shrs if (mtu && rai->rai_linkmtu && mtu != rai->rai_linkmtu) { 1202225519Shrs syslog(LOG_NOTICE, 1203225519Shrs "MTU option value inconsistent on %s:" 1204222732Shrs " %d from %s, %d from us", 1205225519Shrs ifi->ifi_ifname, mtu, 1206222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1207222732Shrs sizeof(ntopbuf)), rai->rai_linkmtu); 120862656Skris inconsistent++; 120955505Sshin } 121055505Sshin } 121155505Sshin /* Preferred and Valid Lifetimes for prefixes */ 121255505Sshin { 1213222732Shrs struct nd_optlist *nol; 121478064Sume 1215222732Shrs if (ndopts.opt_pi) 1216222732Shrs if (prefix_check(ndopts.opt_pi, rai, from)) 121762656Skris inconsistent++; 1218222732Shrs 1219222732Shrs TAILQ_FOREACH(nol, &ndopts.opt_list, nol_next) 1220222732Shrs if (prefix_check((struct nd_opt_prefix_info *)nol->nol_opt, 1221222732Shrs rai, from)) 122262656Skris inconsistent++; 122355505Sshin } 122455505Sshin 122578064Sume if (inconsistent) 1226224144Shrs ifi->ifi_rainconsistent++; 1227222732Shrs 122855505Sshin done: 122955505Sshin free_ndopts(&ndopts); 123055505Sshin return; 123155505Sshin} 123255505Sshin 123362656Skris/* return a non-zero value if the received prefix is inconsitent with ours */ 123462656Skrisstatic int 123555505Sshinprefix_check(struct nd_opt_prefix_info *pinfo, 1236222732Shrs struct rainfo *rai, struct sockaddr_in6 *from) 123755505Sshin{ 1238224144Shrs struct ifinfo *ifi; 1239224144Shrs uint32_t preferred_time, valid_time; 1240222732Shrs struct prefix *pfx; 124162656Skris int inconsistent = 0; 1242224144Shrs char ntopbuf[INET6_ADDRSTRLEN]; 1243224144Shrs char prefixbuf[INET6_ADDRSTRLEN]; 1244253970Shrs struct timespec now; 124555505Sshin 124662656Skris#if 0 /* impossible */ 124762656Skris if (pinfo->nd_opt_pi_type != ND_OPT_PREFIX_INFORMATION) 1248222732Shrs return (0); 124962656Skris#endif 1250224144Shrs ifi = rai->rai_ifinfo; 125155505Sshin /* 125255505Sshin * log if the adveritsed prefix has link-local scope(sanity check?) 125355505Sshin */ 1254222732Shrs if (IN6_IS_ADDR_LINKLOCAL(&pinfo->nd_opt_pi_prefix)) 125555505Sshin syslog(LOG_INFO, 1256222732Shrs "<%s> link-local prefix %s/%d is advertised " 1257222732Shrs "from %s on %s", 1258222732Shrs __func__, 1259222732Shrs inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix, prefixbuf, 1260222732Shrs sizeof(prefixbuf)), 1261222732Shrs pinfo->nd_opt_pi_prefix_len, 1262222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1263224144Shrs sizeof(ntopbuf)), ifi->ifi_ifname); 126455505Sshin 1265222732Shrs if ((pfx = find_prefix(rai, &pinfo->nd_opt_pi_prefix, 1266222732Shrs pinfo->nd_opt_pi_prefix_len)) == NULL) { 126755505Sshin syslog(LOG_INFO, 1268222732Shrs "<%s> prefix %s/%d from %s on %s is not in our list", 1269222732Shrs __func__, 1270222732Shrs inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix, prefixbuf, 1271222732Shrs sizeof(prefixbuf)), 1272222732Shrs pinfo->nd_opt_pi_prefix_len, 1273222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1274224144Shrs sizeof(ntopbuf)), ifi->ifi_ifname); 1275222732Shrs return (0); 127655505Sshin } 127755505Sshin 127855505Sshin preferred_time = ntohl(pinfo->nd_opt_pi_preferred_time); 1279222732Shrs if (pfx->pfx_pltimeexpire) { 128078064Sume /* 128178064Sume * The lifetime is decremented in real time, so we should 128278064Sume * compare the expiration time. 128378064Sume * (RFC 2461 Section 6.2.7.) 128478064Sume * XXX: can we really expect that all routers on the link 128578064Sume * have synchronized clocks? 128678064Sume */ 1287253970Shrs clock_gettime(CLOCK_MONOTONIC_FAST, &now); 128878064Sume preferred_time += now.tv_sec; 128978064Sume 1290222732Shrs if (!pfx->pfx_timer && rai->rai_clockskew && 1291222732Shrs abs(preferred_time - pfx->pfx_pltimeexpire) > rai->rai_clockskew) { 129278064Sume syslog(LOG_INFO, 1293222732Shrs "<%s> preferred lifetime for %s/%d" 1294222732Shrs " (decr. in real time) inconsistent on %s:" 1295224144Shrs " %" PRIu32 " from %s, %" PRIu32 " from us", 1296222732Shrs __func__, 1297222732Shrs inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix, prefixbuf, 1298222732Shrs sizeof(prefixbuf)), 1299222732Shrs pinfo->nd_opt_pi_prefix_len, 1300224144Shrs ifi->ifi_ifname, preferred_time, 1301222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1302222732Shrs sizeof(ntopbuf)), pfx->pfx_pltimeexpire); 130378064Sume inconsistent++; 130478064Sume } 1305222732Shrs } else if (!pfx->pfx_timer && preferred_time != pfx->pfx_preflifetime) 130678064Sume syslog(LOG_INFO, 1307222732Shrs "<%s> preferred lifetime for %s/%d" 1308222732Shrs " inconsistent on %s:" 1309222732Shrs " %d from %s, %d from us", 1310222732Shrs __func__, 1311222732Shrs inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix, prefixbuf, 1312222732Shrs sizeof(prefixbuf)), 1313222732Shrs pinfo->nd_opt_pi_prefix_len, 1314224144Shrs ifi->ifi_ifname, preferred_time, 1315222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1316222732Shrs sizeof(ntopbuf)), pfx->pfx_preflifetime); 131755505Sshin 131855505Sshin valid_time = ntohl(pinfo->nd_opt_pi_valid_time); 1319222732Shrs if (pfx->pfx_vltimeexpire) { 1320253970Shrs clock_gettime(CLOCK_MONOTONIC_FAST, &now); 132178064Sume valid_time += now.tv_sec; 132278064Sume 1323222732Shrs if (!pfx->pfx_timer && rai->rai_clockskew && 1324222732Shrs abs(valid_time - pfx->pfx_vltimeexpire) > rai->rai_clockskew) { 132578064Sume syslog(LOG_INFO, 1326222732Shrs "<%s> valid lifetime for %s/%d" 1327222732Shrs " (decr. in real time) inconsistent on %s:" 1328224144Shrs " %d from %s, %" PRIu32 " from us", 1329222732Shrs __func__, 1330222732Shrs inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix, prefixbuf, 1331222732Shrs sizeof(prefixbuf)), 1332222732Shrs pinfo->nd_opt_pi_prefix_len, 1333224144Shrs ifi->ifi_ifname, preferred_time, 1334222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1335222732Shrs sizeof(ntopbuf)), pfx->pfx_vltimeexpire); 133678064Sume inconsistent++; 133778064Sume } 1338222732Shrs } else if (!pfx->pfx_timer && valid_time != pfx->pfx_validlifetime) { 133978064Sume syslog(LOG_INFO, 1340222732Shrs "<%s> valid lifetime for %s/%d" 1341222732Shrs " inconsistent on %s:" 1342222732Shrs " %d from %s, %d from us", 1343222732Shrs __func__, 1344222732Shrs inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix, prefixbuf, 1345222732Shrs sizeof(prefixbuf)), 1346222732Shrs pinfo->nd_opt_pi_prefix_len, 1347224144Shrs ifi->ifi_ifname, valid_time, 1348222732Shrs inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf, 1349222732Shrs sizeof(ntopbuf)), pfx->pfx_validlifetime); 135062656Skris inconsistent++; 135162656Skris } 135262656Skris 1353222732Shrs return (inconsistent); 135455505Sshin} 135555505Sshin 135655505Sshinstruct prefix * 135755505Sshinfind_prefix(struct rainfo *rai, struct in6_addr *prefix, int plen) 135855505Sshin{ 1359222732Shrs struct prefix *pfx; 136055505Sshin int bytelen, bitlen; 1361224144Shrs char bitmask; 136255505Sshin 1363222732Shrs TAILQ_FOREACH(pfx, &rai->rai_prefix, pfx_next) { 1364222732Shrs if (plen != pfx->pfx_prefixlen) 136555505Sshin continue; 1366222732Shrs 136755505Sshin bytelen = plen / 8; 136855505Sshin bitlen = plen % 8; 1369118968Sume bitmask = 0xff << (8 - bitlen); 1370222732Shrs 1371222732Shrs if (memcmp((void *)prefix, (void *)&pfx->pfx_prefix, bytelen)) 137255505Sshin continue; 1373222732Shrs 1374118968Sume if (bitlen == 0 || 1375222732Shrs ((prefix->s6_addr[bytelen] & bitmask) == 1376222732Shrs (pfx->pfx_prefix.s6_addr[bytelen] & bitmask))) { 1377222732Shrs return (pfx); 1378118968Sume } 137955505Sshin } 138055505Sshin 1381222732Shrs return (NULL); 138255505Sshin} 138355505Sshin 138478064Sume/* check if p0/plen0 matches p1/plen1; return 1 if matches, otherwise 0. */ 138578064Sumeint 138678064Sumeprefix_match(struct in6_addr *p0, int plen0, 1387222732Shrs struct in6_addr *p1, int plen1) 138878064Sume{ 138978064Sume int bytelen, bitlen; 1390224144Shrs char bitmask; 139178064Sume 139278064Sume if (plen0 < plen1) 1393222732Shrs return (0); 1394222732Shrs 139578064Sume bytelen = plen1 / 8; 139678064Sume bitlen = plen1 % 8; 1397118968Sume bitmask = 0xff << (8 - bitlen); 1398222732Shrs 139978064Sume if (memcmp((void *)p0, (void *)p1, bytelen)) 1400222732Shrs return (0); 1401222732Shrs 1402118968Sume if (bitlen == 0 || 1403118968Sume ((p0->s6_addr[bytelen] & bitmask) == 1404118968Sume (p1->s6_addr[bytelen] & bitmask))) { 1405222732Shrs return (1); 1406118968Sume } 140778064Sume 1408222732Shrs return (0); 140978064Sume} 141078064Sume 141155505Sshinstatic int 141255505Sshinnd6_options(struct nd_opt_hdr *hdr, int limit, 1413224144Shrs union nd_opt *ndopts, uint32_t optflags) 141455505Sshin{ 141555505Sshin int optlen = 0; 141655505Sshin 141755505Sshin for (; limit > 0; limit -= optlen) { 1418222732Shrs if ((size_t)limit < sizeof(struct nd_opt_hdr)) { 1419118660Sume syslog(LOG_INFO, "<%s> short option header", __func__); 1420112676Sume goto bad; 1421112676Sume } 1422112676Sume 142355505Sshin hdr = (struct nd_opt_hdr *)((caddr_t)hdr + optlen); 142455505Sshin if (hdr->nd_opt_len == 0) { 1425112676Sume syslog(LOG_INFO, 142697712Sume "<%s> bad ND option length(0) (type = %d)", 1427118660Sume __func__, hdr->nd_opt_type); 142855505Sshin goto bad; 142955505Sshin } 1430112676Sume optlen = hdr->nd_opt_len << 3; 1431112676Sume if (optlen > limit) { 1432118660Sume syslog(LOG_INFO, "<%s> short option", __func__); 1433112676Sume goto bad; 1434112676Sume } 143555505Sshin 1436222732Shrs if (hdr->nd_opt_type > ND_OPT_MTU && 1437222732Shrs hdr->nd_opt_type != ND_OPT_RDNSS && 1438222732Shrs hdr->nd_opt_type != ND_OPT_DNSSL) { 1439118664Sume syslog(LOG_INFO, "<%s> unknown ND option(type %d)", 1440118660Sume __func__, hdr->nd_opt_type); 144155505Sshin continue; 144255505Sshin } 144355505Sshin 144455505Sshin if ((ndopt_flags[hdr->nd_opt_type] & optflags) == 0) { 1445118664Sume syslog(LOG_INFO, "<%s> unexpected ND option(type %d)", 1446118664Sume __func__, hdr->nd_opt_type); 144755505Sshin continue; 144855505Sshin } 144955505Sshin 1450112676Sume /* 1451112676Sume * Option length check. Do it here for all fixed-length 1452112676Sume * options. 1453112676Sume */ 1454222732Shrs switch (hdr->nd_opt_type) { 1455222732Shrs case ND_OPT_MTU: 1456222732Shrs if (optlen == sizeof(struct nd_opt_mtu)) 1457222732Shrs break; 1458222732Shrs goto skip; 1459222732Shrs case ND_OPT_RDNSS: 1460222732Shrs if (optlen >= 24 && 1461222732Shrs (optlen - sizeof(struct nd_opt_rdnss)) % 16 == 0) 1462222732Shrs break; 1463222732Shrs goto skip; 1464222732Shrs case ND_OPT_DNSSL: 1465222732Shrs if (optlen >= 16 && 1466222732Shrs (optlen - sizeof(struct nd_opt_dnssl)) % 8 == 0) 1467222732Shrs break; 1468222732Shrs goto skip; 1469222732Shrs case ND_OPT_PREFIX_INFORMATION: 1470222732Shrs if (optlen == sizeof(struct nd_opt_prefix_info)) 1471222732Shrs break; 1472222732Shrsskip: 1473112676Sume syslog(LOG_INFO, "<%s> invalid option length", 1474118660Sume __func__); 1475112676Sume continue; 1476112676Sume } 1477112676Sume 147897712Sume switch (hdr->nd_opt_type) { 147997712Sume case ND_OPT_TARGET_LINKADDR: 148097712Sume case ND_OPT_REDIRECTED_HEADER: 1481222732Shrs case ND_OPT_RDNSS: 1482222732Shrs case ND_OPT_DNSSL: 1483112676Sume break; /* we don't care about these options */ 1484151469Ssuz case ND_OPT_SOURCE_LINKADDR: 148597712Sume case ND_OPT_MTU: 1486222732Shrs if (ndopts->opt_array[hdr->nd_opt_type]) { 148797712Sume syslog(LOG_INFO, 148897712Sume "<%s> duplicated ND option (type = %d)", 1489118660Sume __func__, hdr->nd_opt_type); 149097712Sume } 1491222732Shrs ndopts->opt_array[hdr->nd_opt_type] = hdr; 149297712Sume break; 149397712Sume case ND_OPT_PREFIX_INFORMATION: 149497712Sume { 1495222732Shrs struct nd_optlist *nol; 149655505Sshin 1497222732Shrs if (ndopts->opt_pi == 0) { 1498222732Shrs ndopts->opt_pi = 149997712Sume (struct nd_opt_prefix_info *)hdr; 150097712Sume continue; 150197712Sume } 1502222732Shrs nol = malloc(sizeof(*nol)); 1503222732Shrs if (nol == NULL) { 150497712Sume syslog(LOG_ERR, "<%s> can't allocate memory", 1505118660Sume __func__); 150697712Sume goto bad; 150797712Sume } 1508222732Shrs nol->nol_opt = hdr; 1509222732Shrs TAILQ_INSERT_TAIL(&(ndopts->opt_list), nol, nol_next); 151055505Sshin 151197712Sume break; 151255505Sshin } 151397712Sume default: /* impossible */ 151497712Sume break; 151597712Sume } 151655505Sshin } 151755505Sshin 1518222732Shrs return (0); 151955505Sshin 152055505Sshin bad: 152155505Sshin free_ndopts(ndopts); 152255505Sshin 1523222732Shrs return (-1); 152455505Sshin} 152555505Sshin 152655505Sshinstatic void 1527222732Shrsfree_ndopts(union nd_opt *ndopts) 152855505Sshin{ 1529222732Shrs struct nd_optlist *nol; 153055505Sshin 1531222732Shrs while ((nol = TAILQ_FIRST(&ndopts->opt_list)) != NULL) { 1532222732Shrs TAILQ_REMOVE(&ndopts->opt_list, nol, nol_next); 1533222732Shrs free(nol); 153455505Sshin } 153555505Sshin} 153655505Sshin 153755505Sshinvoid 1538224144Shrssock_open(struct sockinfo *s) 153955505Sshin{ 154055505Sshin struct icmp6_filter filt; 154155505Sshin int on; 154255505Sshin /* XXX: should be max MTU attached to the node */ 1543224144Shrs static char answer[1500]; 154455505Sshin 1545224144Shrs syslog(LOG_DEBUG, "<%s> enter", __func__); 1546224144Shrs 1547224144Shrs if (s == NULL) { 1548224144Shrs syslog(LOG_ERR, "<%s> internal error", __func__); 1549224144Shrs exit(1); 1550224144Shrs } 155162656Skris rcvcmsgbuflen = CMSG_SPACE(sizeof(struct in6_pktinfo)) + 1552222732Shrs CMSG_SPACE(sizeof(int)); 1553224144Shrs rcvcmsgbuf = (char *)malloc(rcvcmsgbuflen); 155462656Skris if (rcvcmsgbuf == NULL) { 1555118660Sume syslog(LOG_ERR, "<%s> not enough core", __func__); 155662656Skris exit(1); 155762656Skris } 155862656Skris 1559222732Shrs sndcmsgbuflen = CMSG_SPACE(sizeof(struct in6_pktinfo)) + 1560222732Shrs CMSG_SPACE(sizeof(int)); 1561224144Shrs sndcmsgbuf = (char *)malloc(sndcmsgbuflen); 156262656Skris if (sndcmsgbuf == NULL) { 1563118660Sume syslog(LOG_ERR, "<%s> not enough core", __func__); 156462656Skris exit(1); 156562656Skris } 156662656Skris 1567224144Shrs if ((s->si_fd = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) { 1568222732Shrs syslog(LOG_ERR, "<%s> socket: %s", __func__, strerror(errno)); 156955505Sshin exit(1); 157055505Sshin } 157155505Sshin /* specify to tell receiving interface */ 157255505Sshin on = 1; 1573224144Shrs if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, 1574222732Shrs sizeof(on)) < 0) { 1575222732Shrs syslog(LOG_ERR, "<%s> IPV6_RECVPKTINFO: %s", __func__, 1576222732Shrs strerror(errno)); 157762656Skris exit(1); 157862656Skris } 157955505Sshin on = 1; 158055505Sshin /* specify to tell value of hoplimit field of received IP6 hdr */ 1581224144Shrs if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on, 1582222732Shrs sizeof(on)) < 0) { 1583222732Shrs syslog(LOG_ERR, "<%s> IPV6_RECVHOPLIMIT: %s", __func__, 1584222732Shrs strerror(errno)); 158562656Skris exit(1); 158662656Skris } 158755505Sshin ICMP6_FILTER_SETBLOCKALL(&filt); 158862656Skris ICMP6_FILTER_SETPASS(ND_ROUTER_SOLICIT, &filt); 158962656Skris ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filt); 1590224144Shrs if (mcastif != NULL) 159155505Sshin ICMP6_FILTER_SETPASS(ICMP6_ROUTER_RENUMBERING, &filt); 1592222732Shrs 1593224144Shrs if (setsockopt(s->si_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, 1594222732Shrs sizeof(filt)) < 0) { 159555505Sshin syslog(LOG_ERR, "<%s> IICMP6_FILTER: %s", 1596222732Shrs __func__, strerror(errno)); 159755505Sshin exit(1); 159855505Sshin } 159955505Sshin 160055505Sshin /* initialize msghdr for receiving packets */ 160155505Sshin rcviov[0].iov_base = (caddr_t)answer; 160255505Sshin rcviov[0].iov_len = sizeof(answer); 1603118913Sume rcvmhdr.msg_name = (caddr_t)&rcvfrom; 1604118913Sume rcvmhdr.msg_namelen = sizeof(rcvfrom); 160555505Sshin rcvmhdr.msg_iov = rcviov; 160655505Sshin rcvmhdr.msg_iovlen = 1; 160755505Sshin rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf; 160862656Skris rcvmhdr.msg_controllen = rcvcmsgbuflen; 160955505Sshin 161055505Sshin /* initialize msghdr for sending packets */ 161155505Sshin sndmhdr.msg_namelen = sizeof(struct sockaddr_in6); 161255505Sshin sndmhdr.msg_iov = sndiov; 161355505Sshin sndmhdr.msg_iovlen = 1; 161455505Sshin sndmhdr.msg_control = (caddr_t)sndcmsgbuf; 161562656Skris sndmhdr.msg_controllen = sndcmsgbuflen; 1616222732Shrs 161755505Sshin return; 161855505Sshin} 161955505Sshin 162055505Sshin/* open a routing socket to watch the routing table */ 162155505Sshinstatic void 1622224144Shrsrtsock_open(struct sockinfo *s) 162355505Sshin{ 1624224144Shrs if (s == NULL) { 1625224144Shrs syslog(LOG_ERR, "<%s> internal error", __func__); 1626224144Shrs exit(1); 1627224144Shrs } 1628224144Shrs if ((s->si_fd = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) { 162955505Sshin syslog(LOG_ERR, 1630222732Shrs "<%s> socket: %s", __func__, strerror(errno)); 163155505Sshin exit(1); 163255505Sshin } 163355505Sshin} 163455505Sshin 1635224144Shrsstruct ifinfo * 1636224144Shrsif_indextoifinfo(int idx) 163755505Sshin{ 1638224144Shrs struct ifinfo *ifi; 1639253058Shrs char *name, name0[IFNAMSIZ]; 164055505Sshin 1641253058Shrs /* Check if the interface has a valid name or not. */ 1642253058Shrs if (if_indextoname(idx, name0) == NULL) 1643253058Shrs return (NULL); 1644253058Shrs 1645224144Shrs TAILQ_FOREACH(ifi, &ifilist, ifi_next) { 1646224144Shrs if (ifi->ifi_ifindex == idx) 1647224144Shrs return (ifi); 164855505Sshin } 164955505Sshin 1650224144Shrs if (ifi != NULL) 1651224144Shrs syslog(LOG_DEBUG, "<%s> ifi found (idx=%d)", 1652224144Shrs __func__, idx); 1653224144Shrs else 1654224144Shrs syslog(LOG_DEBUG, "<%s> ifi not found (idx=%d)", 1655224144Shrs __func__, idx); 1656224144Shrs 1657222732Shrs return (NULL); /* search failed */ 165855505Sshin} 165955505Sshin 1660222972Shrsvoid 1661224144Shrsra_output(struct ifinfo *ifi) 166255505Sshin{ 166355505Sshin int i; 166455505Sshin struct cmsghdr *cm; 166555505Sshin struct in6_pktinfo *pi; 1666222732Shrs struct soliciter *sol; 1667224144Shrs struct rainfo *rai; 166855505Sshin 1669224144Shrs switch (ifi->ifi_state) { 1670224144Shrs case IFI_STATE_CONFIGURED: 1671224144Shrs rai = ifi->ifi_rainfo; 1672224144Shrs break; 1673224144Shrs case IFI_STATE_TRANSITIVE: 1674224144Shrs rai = ifi->ifi_rainfo_trans; 1675224144Shrs break; 1676224144Shrs case IFI_STATE_UNCONFIGURED: 1677224144Shrs syslog(LOG_DEBUG, "<%s> %s is unconfigured. " 1678224144Shrs "Skip sending RAs.", 1679224144Shrs __func__, ifi->ifi_ifname); 168062656Skris return; 1681224144Shrs default: 1682224144Shrs rai = NULL; 168362656Skris } 1684224144Shrs if (rai == NULL) { 1685224144Shrs syslog(LOG_DEBUG, "<%s> rainfo is NULL on %s." 1686224144Shrs "Skip sending RAs.", 1687224144Shrs __func__, ifi->ifi_ifname); 1688224144Shrs return; 1689224144Shrs } 1690224144Shrs if (!(ifi->ifi_flags & IFF_UP)) { 1691224144Shrs syslog(LOG_DEBUG, "<%s> %s is not up. " 1692224144Shrs "Skip sending RAs.", 1693224144Shrs __func__, ifi->ifi_ifname); 1694224144Shrs return; 1695224144Shrs } 1696222732Shrs /* 1697222732Shrs * Check lifetime, ACCEPT_RTADV flag, and ip6.forwarding. 1698222732Shrs * 1699222732Shrs * (lifetime == 0) = output 1700224144Shrs * (lifetime != 0 && (check_accept_rtadv()) = no output 1701222732Shrs * 1702222732Shrs * Basically, hosts MUST NOT send Router Advertisement 1703222732Shrs * messages at any time (RFC 4861, Section 6.2.3). However, it 1704222732Shrs * would sometimes be useful to allow hosts to advertise some 1705222732Shrs * parameters such as prefix information and link MTU. Thus, 1706222732Shrs * we allow hosts to invoke rtadvd only when router lifetime 1707222732Shrs * (on every advertising interface) is explicitly set 1708222732Shrs * zero. (see also the above section) 1709222732Shrs */ 1710222732Shrs syslog(LOG_DEBUG, 1711224144Shrs "<%s> check lifetime=%d, ACCEPT_RTADV=%d, ip6.forwarding=%d " 1712224144Shrs "on %s", __func__, 1713224144Shrs rai->rai_lifetime, 1714224144Shrs check_accept_rtadv(ifi->ifi_ifindex), 1715224144Shrs getinet6sysctl(IPV6CTL_FORWARDING), 1716224144Shrs ifi->ifi_ifname); 1717224144Shrs 1718222732Shrs if (rai->rai_lifetime != 0) { 1719225519Shrs if (getinet6sysctl(IPV6CTL_FORWARDING) == 0) { 1720225519Shrs syslog(LOG_ERR, 1721225519Shrs "non-zero lifetime RA " 1722225519Shrs "but net.inet6.ip6.forwarding=0. " 1723225519Shrs "Ignored."); 1724225519Shrs return; 1725225519Shrs } 1726224144Shrs if (check_accept_rtadv(ifi->ifi_ifindex)) { 1727225519Shrs syslog(LOG_ERR, 1728225519Shrs "non-zero lifetime RA " 1729222732Shrs "on RA receiving interface %s." 1730225519Shrs " Ignored.", ifi->ifi_ifname); 1731222732Shrs return; 1732222732Shrs } 1733222732Shrs } 173478064Sume 1735222732Shrs make_packet(rai); /* XXX: inefficient */ 173655505Sshin 1737222732Shrs sndmhdr.msg_name = (caddr_t)&sin6_linklocal_allnodes; 1738222732Shrs sndmhdr.msg_iov[0].iov_base = (caddr_t)rai->rai_ra_data; 1739222732Shrs sndmhdr.msg_iov[0].iov_len = rai->rai_ra_datalen; 1740222732Shrs 174155505Sshin cm = CMSG_FIRSTHDR(&sndmhdr); 174255505Sshin /* specify the outgoing interface */ 174355505Sshin cm->cmsg_level = IPPROTO_IPV6; 174455505Sshin cm->cmsg_type = IPV6_PKTINFO; 174555505Sshin cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 174655505Sshin pi = (struct in6_pktinfo *)CMSG_DATA(cm); 174755505Sshin memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*XXX*/ 1748224144Shrs pi->ipi6_ifindex = ifi->ifi_ifindex; 174955505Sshin 175055505Sshin /* specify the hop limit of the packet */ 175155505Sshin { 175255505Sshin int hoplimit = 255; 175355505Sshin 175455505Sshin cm = CMSG_NXTHDR(&sndmhdr, cm); 175555505Sshin cm->cmsg_level = IPPROTO_IPV6; 175655505Sshin cm->cmsg_type = IPV6_HOPLIMIT; 175755505Sshin cm->cmsg_len = CMSG_LEN(sizeof(int)); 175855505Sshin memcpy(CMSG_DATA(cm), &hoplimit, sizeof(int)); 175955505Sshin } 176055505Sshin 176155505Sshin syslog(LOG_DEBUG, 1762224144Shrs "<%s> send RA on %s, # of RS waitings = %d", 1763224144Shrs __func__, ifi->ifi_ifname, ifi->ifi_rs_waitcount); 176455505Sshin 1765224144Shrs i = sendmsg(sock.si_fd, &sndmhdr, 0); 176655505Sshin 1767222732Shrs if (i < 0 || (size_t)i != rai->rai_ra_datalen) { 176855505Sshin if (i < 0) { 176962656Skris syslog(LOG_ERR, "<%s> sendmsg on %s: %s", 1770224144Shrs __func__, ifi->ifi_ifname, 1771222732Shrs strerror(errno)); 177255505Sshin } 177355505Sshin } 177455505Sshin 177562656Skris /* 177662656Skris * unicast advertisements 177762656Skris * XXX commented out. reason: though spec does not forbit it, unicast 177862656Skris * advert does not really help 177962656Skris */ 1780222732Shrs while ((sol = TAILQ_FIRST(&rai->rai_soliciter)) != NULL) { 1781222732Shrs TAILQ_REMOVE(&rai->rai_soliciter, sol, sol_next); 178262656Skris free(sol); 178362656Skris } 178462656Skris 178555505Sshin /* update timestamp */ 1786253970Shrs clock_gettime(CLOCK_MONOTONIC_FAST, &ifi->ifi_ra_lastsent); 178755505Sshin 1788224144Shrs /* update counter */ 1789224144Shrs ifi->ifi_rs_waitcount = 0; 1790224144Shrs ifi->ifi_raoutput++; 1791224144Shrs 1792224144Shrs switch (ifi->ifi_state) { 1793224144Shrs case IFI_STATE_CONFIGURED: 1794224144Shrs if (ifi->ifi_burstcount > 0) 1795224144Shrs ifi->ifi_burstcount--; 1796224144Shrs break; 1797224144Shrs case IFI_STATE_TRANSITIVE: 1798224144Shrs ifi->ifi_burstcount--; 1799224144Shrs if (ifi->ifi_burstcount == 0) { 1800224144Shrs if (ifi->ifi_rainfo == ifi->ifi_rainfo_trans) { 1801228990Suqs /* Initial burst finished. */ 1802224144Shrs if (ifi->ifi_rainfo_trans != NULL) 1803224144Shrs ifi->ifi_rainfo_trans = NULL; 1804224144Shrs } 1805224144Shrs 1806224144Shrs /* Remove burst RA information */ 1807224144Shrs if (ifi->ifi_rainfo_trans != NULL) { 1808224144Shrs rm_rainfo(ifi->ifi_rainfo_trans); 1809224144Shrs ifi->ifi_rainfo_trans = NULL; 1810224144Shrs } 1811224144Shrs 1812224144Shrs if (ifi->ifi_rainfo != NULL) { 1813224144Shrs /* 1814224144Shrs * TRANSITIVE -> CONFIGURED 1815224144Shrs * 1816224144Shrs * After initial burst or transition from 1817224144Shrs * one configuration to another, 1818224144Shrs * ifi_rainfo always points to the next RA 1819224144Shrs * information. 1820224144Shrs */ 1821224144Shrs ifi->ifi_state = IFI_STATE_CONFIGURED; 1822224144Shrs syslog(LOG_DEBUG, 1823224144Shrs "<%s> ifname=%s marked as " 1824224144Shrs "CONFIGURED.", __func__, 1825224144Shrs ifi->ifi_ifname); 1826224144Shrs } else { 1827224144Shrs /* 1828224144Shrs * TRANSITIVE -> UNCONFIGURED 1829224144Shrs * 1830224144Shrs * If ifi_rainfo points to NULL, this 1831224144Shrs * interface is shutting down. 1832224144Shrs * 1833224144Shrs */ 1834224144Shrs int error; 1835224144Shrs 1836224144Shrs ifi->ifi_state = IFI_STATE_UNCONFIGURED; 1837224144Shrs syslog(LOG_DEBUG, 1838224144Shrs "<%s> ifname=%s marked as " 1839224144Shrs "UNCONFIGURED.", __func__, 1840224144Shrs ifi->ifi_ifname); 1841224144Shrs error = sock_mc_leave(&sock, 1842224144Shrs ifi->ifi_ifindex); 1843224144Shrs if (error) 1844224144Shrs exit(1); 1845224144Shrs } 1846224144Shrs } 1847224144Shrs break; 1848224144Shrs } 184955505Sshin} 185055505Sshin 185155505Sshin/* process RA timer */ 185298172Sumestruct rtadvd_timer * 1853222732Shrsra_timeout(void *arg) 185455505Sshin{ 1855224144Shrs struct ifinfo *ifi; 185655505Sshin 1857224144Shrs ifi = (struct ifinfo *)arg; 1858222732Shrs syslog(LOG_DEBUG, "<%s> RA timer on %s is expired", 1859224144Shrs __func__, ifi->ifi_ifname); 186055505Sshin 1861224144Shrs ra_output(ifi); 186298172Sume 1863224144Shrs return (ifi->ifi_ra_timer); 186455505Sshin} 186555505Sshin 186655505Sshin/* update RA timer */ 186755505Sshinvoid 1868253970Shrsra_timer_update(void *arg, struct timespec *tm) 186955505Sshin{ 1870224144Shrs uint16_t interval; 1871222732Shrs struct rainfo *rai; 1872224144Shrs struct ifinfo *ifi; 187355505Sshin 1874224144Shrs ifi = (struct ifinfo *)arg; 1875224144Shrs rai = ifi->ifi_rainfo; 1876224144Shrs interval = 0; 1877224144Shrs 1878224144Shrs switch (ifi->ifi_state) { 1879224144Shrs case IFI_STATE_UNCONFIGURED: 1880224144Shrs return; 1881224144Shrs break; 1882224144Shrs case IFI_STATE_CONFIGURED: 1883224144Shrs /* 1884224144Shrs * Whenever a multicast advertisement is sent from 1885224144Shrs * an interface, the timer is reset to a 1886224144Shrs * uniformly-distributed random value between the 1887224144Shrs * interface's configured MinRtrAdvInterval and 1888224144Shrs * MaxRtrAdvInterval (RFC4861 6.2.4). 1889224144Shrs */ 1890224144Shrs interval = rai->rai_mininterval; 1891118962Sume#ifdef HAVE_ARC4RANDOM 1892224144Shrs interval += arc4random_uniform(rai->rai_maxinterval - 1893224144Shrs rai->rai_mininterval); 1894118962Sume#else 1895224144Shrs interval += random() % (rai->rai_maxinterval - 1896224144Shrs rai->rai_mininterval); 1897118962Sume#endif 1898224144Shrs break; 1899224144Shrs case IFI_STATE_TRANSITIVE: 1900224144Shrs /* 1901224144Shrs * For the first few advertisements (up to 1902224144Shrs * MAX_INITIAL_RTR_ADVERTISEMENTS), if the randomly chosen 1903224144Shrs * interval is greater than 1904224144Shrs * MAX_INITIAL_RTR_ADVERT_INTERVAL, the timer SHOULD be 1905224144Shrs * set to MAX_INITIAL_RTR_ADVERT_INTERVAL instead. (RFC 1906224144Shrs * 4861 6.2.4) 1907224144Shrs * 1908224144Shrs * In such cases, the router SHOULD transmit one or more 1909224144Shrs * (but not more than MAX_FINAL_RTR_ADVERTISEMENTS) final 1910224144Shrs * multicast Router Advertisements on the interface with a 1911224144Shrs * Router Lifetime field of zero. (RFC 4861 6.2.5) 1912224144Shrs */ 1913224144Shrs interval = ifi->ifi_burstinterval; 1914224144Shrs break; 1915224144Shrs } 191655505Sshin 191755505Sshin tm->tv_sec = interval; 1918253970Shrs tm->tv_nsec = 0; 191955505Sshin 192055505Sshin syslog(LOG_DEBUG, 1921222732Shrs "<%s> RA timer on %s is set to %ld:%ld", 1922224144Shrs __func__, ifi->ifi_ifname, 1923253970Shrs (long int)tm->tv_sec, (long int)tm->tv_nsec / 1000); 192455505Sshin 192555505Sshin return; 192655505Sshin} 1927