route6d.c revision 1.32.2.4
1 /* $NetBSD: route6d.c,v 1.32.2.4 2004/03/15 05:08:59 jmc Exp $ */ 2 /* $KAME: route6d.c,v 1.88 2002/08/21 16:24:25 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __RCSID("$NetBSD: route6d.c,v 1.32.2.4 2004/03/15 05:08:59 jmc Exp $"); 36 #endif 37 38 #include <stdio.h> 39 40 #include <time.h> 41 #include <unistd.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <signal.h> 45 #ifdef __STDC__ 46 #include <stdarg.h> 47 #else 48 #include <varargs.h> 49 #endif 50 #include <syslog.h> 51 #include <stddef.h> 52 #include <errno.h> 53 #include <err.h> 54 55 #include <sys/types.h> 56 #include <sys/param.h> 57 #include <sys/file.h> 58 #include <sys/socket.h> 59 #include <sys/ioctl.h> 60 #include <sys/sysctl.h> 61 #include <sys/uio.h> 62 #include <net/if.h> 63 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 64 #include <net/if_var.h> 65 #endif /* __FreeBSD__ >= 3 */ 66 #define KERNEL 1 67 #define _KERNEL 1 68 #include <net/route.h> 69 #undef KERNEL 70 #undef _KERNEL 71 #include <netinet/in.h> 72 #include <netinet/in_var.h> 73 #include <netinet/ip6.h> 74 #include <netinet/udp.h> 75 #include <netdb.h> 76 #include <ifaddrs.h> 77 78 #include <arpa/inet.h> 79 80 #include "route6d.h" 81 82 #define MAXFILTER 40 83 84 #ifdef DEBUG 85 #define INIT_INTERVAL6 6 86 #else 87 #define INIT_INTERVAL6 10 /* Wait to submit a initial riprequest */ 88 #endif 89 90 /* alignment constraint for routing socket */ 91 #define ROUNDUP(a) \ 92 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 93 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 94 95 /* 96 * Following two macros are highly depending on KAME Release 97 */ 98 #define IN6_LINKLOCAL_IFINDEX(addr) \ 99 ((addr).s6_addr[2] << 8 | (addr).s6_addr[3]) 100 101 #define SET_IN6_LINKLOCAL_IFINDEX(addr, index) \ 102 do { \ 103 (addr).s6_addr[2] = ((index) >> 8) & 0xff; \ 104 (addr).s6_addr[3] = (index) & 0xff; \ 105 } while (0) 106 107 struct ifc { /* Configuration of an interface */ 108 char *ifc_name; /* if name */ 109 struct ifc *ifc_next; 110 int ifc_index; /* if index */ 111 int ifc_mtu; /* if mtu */ 112 int ifc_metric; /* if metric */ 113 u_int ifc_flags; /* flags */ 114 short ifc_cflags; /* IFC_XXX */ 115 struct in6_addr ifc_mylladdr; /* my link-local address */ 116 struct sockaddr_in6 ifc_ripsin; /* rip multicast address */ 117 struct iff *ifc_filter; /* filter structure */ 118 struct ifac *ifc_addr; /* list of AF_INET6 addresses */ 119 int ifc_joined; /* joined to ff02::9 */ 120 }; 121 122 struct ifac { /* Adddress associated to an interface */ 123 struct ifc *ifa_conf; /* back pointer */ 124 struct ifac *ifa_next; 125 struct in6_addr ifa_addr; /* address */ 126 struct in6_addr ifa_raddr; /* remote address, valid in p2p */ 127 int ifa_plen; /* prefix length */ 128 }; 129 130 struct iff { 131 int iff_type; 132 struct in6_addr iff_addr; 133 int iff_plen; 134 struct iff *iff_next; 135 }; 136 137 struct ifc *ifc; 138 int nifc; /* number of valid ifc's */ 139 struct ifc **index2ifc; 140 int nindex2ifc; 141 struct ifc *loopifcp = NULL; /* pointing to loopback */ 142 fd_set sockvec; /* vector to select() for receiving */ 143 int rtsock; /* the routing socket */ 144 int ripsock; /* socket to send/receive RIP datagram */ 145 int maxfd; /* maximum fd for select() */ 146 147 struct rip6 *ripbuf; /* packet buffer for sending */ 148 149 /* 150 * Maintain the routes in a linked list. When the number of the routes 151 * grows, somebody would like to introduce a hash based or a radix tree 152 * based structure. I believe the number of routes handled by RIP is 153 * limited and I don't have to manage a complex data structure, however. 154 * 155 * One of the major drawbacks of the linear linked list is the difficulty 156 * of representing the relationship between a couple of routes. This may 157 * be a significant problem when we have to support route aggregation with 158 * supressing the specifices covered by the aggregate. 159 */ 160 161 struct riprt { 162 struct riprt *rrt_next; /* next destination */ 163 struct riprt *rrt_same; /* same destination - future use */ 164 struct netinfo6 rrt_info; /* network info */ 165 struct in6_addr rrt_gw; /* gateway */ 166 u_long rrt_flags; /* kernel routing table flags */ 167 u_long rrt_rflags; /* route6d routing table flags */ 168 time_t rrt_t; /* when the route validated */ 169 int rrt_index; /* ifindex from which this route got */ 170 }; 171 172 struct riprt *riprt = 0; 173 174 int dflag = 0; /* debug flag */ 175 int qflag = 0; /* quiet flag */ 176 int nflag = 0; /* don't update kernel routing table */ 177 int aflag = 0; /* age out even the statically defined routes */ 178 int hflag = 0; /* don't split horizon */ 179 int lflag = 0; /* exchange site local routes */ 180 int sflag = 0; /* announce static routes w/ split horizon */ 181 int Sflag = 0; /* announce static routes to every interface */ 182 unsigned long routetag = 0; /* route tag attached on originating case */ 183 184 char *filter[MAXFILTER]; 185 int filtertype[MAXFILTER]; 186 int nfilter = 0; 187 188 pid_t pid; 189 190 struct sockaddr_storage ripsin; 191 192 struct rtentry rtentry; 193 194 int interval = 1; 195 time_t nextalarm = 0; 196 time_t sup_trig_update = 0; 197 198 FILE *rtlog = NULL; 199 200 int logopened = 0; 201 202 static u_long seq = 0; 203 204 volatile int signo; 205 volatile sig_atomic_t seenalrm; 206 volatile sig_atomic_t seenquit; 207 volatile sig_atomic_t seenusr1; 208 209 #define RRTF_AGGREGATE 0x08000000 210 #define RRTF_NOADVERTISE 0x10000000 211 #define RRTF_NH_NOT_LLADDR 0x20000000 212 #define RRTF_SENDANYWAY 0x40000000 213 #define RRTF_CHANGED 0x80000000 214 215 int main __P((int, char **)); 216 void sighandler __P((int)); 217 void ripalarm __P((void)); 218 void riprecv __P((void)); 219 void ripsend __P((struct ifc *, struct sockaddr_in6 *, int)); 220 int out_filter __P((struct riprt *, struct ifc *)); 221 void init __P((void)); 222 void sockopt __P((struct ifc *)); 223 void ifconfig __P((void)); 224 void ifconfig1 __P((const char *, const struct sockaddr *, struct ifc *, int)); 225 void rtrecv __P((void)); 226 int rt_del __P((const struct sockaddr_in6 *, const struct sockaddr_in6 *, 227 const struct sockaddr_in6 *)); 228 int rt_deladdr __P((struct ifc *, const struct sockaddr_in6 *, 229 const struct sockaddr_in6 *)); 230 void filterconfig __P((void)); 231 int getifmtu __P((int)); 232 const char *rttypes __P((struct rt_msghdr *)); 233 const char *rtflags __P((struct rt_msghdr *)); 234 const char *ifflags __P((int)); 235 int ifrt __P((struct ifc *, int)); 236 void ifrt_p2p __P((struct ifc *, int)); 237 void applymask __P((struct in6_addr *, struct in6_addr *)); 238 void applyplen __P((struct in6_addr *, int)); 239 void ifrtdump __P((int)); 240 void ifdump __P((int)); 241 void ifdump0 __P((FILE *, const struct ifc *)); 242 void rtdump __P((int)); 243 void rt_entry __P((struct rt_msghdr *, int)); 244 void rtdexit __P((void)); 245 void riprequest __P((struct ifc *, struct netinfo6 *, int, 246 struct sockaddr_in6 *)); 247 void ripflush __P((struct ifc *, struct sockaddr_in6 *)); 248 void sendrequest __P((struct ifc *)); 249 int sin6mask2len __P((const struct sockaddr_in6 *)); 250 int mask2len __P((const struct in6_addr *, int)); 251 int sendpacket __P((struct sockaddr_in6 *, int)); 252 int addroute __P((struct riprt *, const struct in6_addr *, struct ifc *)); 253 int delroute __P((struct netinfo6 *, struct in6_addr *)); 254 struct in6_addr *getroute __P((struct netinfo6 *, struct in6_addr *)); 255 void krtread __P((int)); 256 int tobeadv __P((struct riprt *, struct ifc *)); 257 char *allocopy __P((char *)); 258 char *hms __P((void)); 259 const char *inet6_n2p __P((const struct in6_addr *)); 260 struct ifac *ifa_match __P((const struct ifc *, const struct in6_addr *, int)); 261 struct in6_addr *plen2mask __P((int)); 262 struct riprt *rtsearch __P((struct netinfo6 *, struct riprt **)); 263 int ripinterval __P((int)); 264 time_t ripsuptrig __P((void)); 265 void fatal __P((const char *, ...)) 266 __attribute__((__format__(__printf__, 1, 2))); 267 void trace __P((int, const char *, ...)) 268 __attribute__((__format__(__printf__, 2, 3))); 269 void tracet __P((int, const char *, ...)) 270 __attribute__((__format__(__printf__, 2, 3))); 271 unsigned int if_maxindex __P((void)); 272 struct ifc *ifc_find __P((char *)); 273 struct iff *iff_find __P((struct ifc *, int)); 274 void setindex2ifc __P((int, struct ifc *)); 275 276 #define MALLOC(type) ((type *)malloc(sizeof(type))) 277 278 int 279 main(argc, argv) 280 int argc; 281 char **argv; 282 { 283 int ch; 284 int error = 0; 285 struct ifc *ifcp; 286 sigset_t mask, omask; 287 FILE *pidfile; 288 char *progname; 289 char *ep; 290 291 progname = strrchr(*argv, '/'); 292 if (progname) 293 progname++; 294 else 295 progname = *argv; 296 297 pid = getpid(); 298 while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnqsS")) != -1) { 299 switch (ch) { 300 case 'A': 301 case 'N': 302 case 'O': 303 case 'T': 304 case 'L': 305 if (nfilter >= MAXFILTER) { 306 fatal("Exceeds MAXFILTER"); 307 /*NOTREACHED*/ 308 } 309 filtertype[nfilter] = ch; 310 filter[nfilter++] = allocopy(optarg); 311 break; 312 case 't': 313 ep = NULL; 314 routetag = strtoul(optarg, &ep, 0); 315 if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) { 316 fatal("invalid route tag"); 317 /*NOTREACHED*/ 318 } 319 break; 320 case 'R': 321 if ((rtlog = fopen(optarg, "w")) == NULL) { 322 fatal("Can not write to routelog"); 323 /*NOTREACHED*/ 324 } 325 break; 326 #define FLAG(c, flag, n) case c: do { flag = n; break; } while(0) 327 FLAG('a', aflag, 1); break; 328 FLAG('d', dflag, 1); break; 329 FLAG('D', dflag, 2); break; 330 FLAG('h', hflag, 1); break; 331 FLAG('l', lflag, 1); break; 332 FLAG('n', nflag, 1); break; 333 FLAG('q', qflag, 1); break; 334 FLAG('s', sflag, 1); break; 335 FLAG('S', Sflag, 1); break; 336 #undef FLAG 337 default: 338 fatal("Invalid option specified, terminating"); 339 /*NOTREACHED*/ 340 } 341 } 342 argc -= optind; 343 argv += optind; 344 if (argc > 0) { 345 fatal("bogus extra arguments"); 346 /*NOTREACHED*/ 347 } 348 349 if (geteuid()) { 350 nflag = 1; 351 fprintf(stderr, "No kernel update is allowed\n"); 352 } 353 354 if (dflag == 0) { 355 if (daemon(0, 0) < 0) { 356 fatal("daemon"); 357 /*NOTREACHED*/ 358 } 359 } 360 361 openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON); 362 logopened++; 363 364 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) 365 fatal("malloc"); 366 memset(ripbuf, 0, RIP6_MAXMTU); 367 ripbuf->rip6_cmd = RIP6_RESPONSE; 368 ripbuf->rip6_vers = RIP6_VERSION; 369 ripbuf->rip6_res1[0] = 0; 370 ripbuf->rip6_res1[1] = 0; 371 372 init(); 373 ifconfig(); 374 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 375 if (ifcp->ifc_index < 0) { 376 fprintf(stderr, 377 "No ifindex found at %s (no link-local address?)\n", 378 ifcp->ifc_name); 379 error++; 380 } 381 } 382 if (error) 383 exit(1); 384 if (loopifcp == NULL) { 385 fatal("No loopback found"); 386 /*NOTREACHED*/ 387 } 388 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) 389 ifrt(ifcp, 0); 390 filterconfig(); 391 krtread(0); 392 if (dflag) 393 ifrtdump(0); 394 395 pid = getpid(); 396 if ((pidfile = fopen(ROUTE6D_PID, "w")) != NULL) { 397 fprintf(pidfile, "%d\n", pid); 398 fclose(pidfile); 399 } 400 401 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) { 402 fatal("malloc"); 403 /*NOTREACHED*/ 404 } 405 memset(ripbuf, 0, RIP6_MAXMTU); 406 ripbuf->rip6_cmd = RIP6_RESPONSE; 407 ripbuf->rip6_vers = RIP6_VERSION; 408 ripbuf->rip6_res1[0] = 0; 409 ripbuf->rip6_res1[1] = 0; 410 411 if (signal(SIGALRM, sighandler) == SIG_ERR || 412 signal(SIGQUIT, sighandler) == SIG_ERR || 413 signal(SIGTERM, sighandler) == SIG_ERR || 414 signal(SIGUSR1, sighandler) == SIG_ERR || 415 signal(SIGHUP, sighandler) == SIG_ERR || 416 signal(SIGINT, sighandler) == SIG_ERR) { 417 fatal("signal"); 418 /*NOTREACHED*/ 419 } 420 /* 421 * To avoid rip packet congestion (not on a cable but in this 422 * process), wait for a moment to send the first RIP6_RESPONSE 423 * packets. 424 */ 425 alarm(ripinterval(INIT_INTERVAL6)); 426 427 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 428 if (iff_find(ifcp, 'N')) 429 continue; 430 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 431 sendrequest(ifcp); 432 } 433 434 syslog(LOG_INFO, "**** Started ****"); 435 sigemptyset(&mask); 436 sigaddset(&mask, SIGALRM); 437 while (1) { 438 fd_set recvec; 439 440 if (seenalrm) { 441 ripalarm(); 442 seenalrm = 0; 443 continue; 444 } 445 if (seenquit) { 446 rtdexit(); 447 seenquit = 0; 448 continue; 449 } 450 if (seenusr1) { 451 ifrtdump(SIGUSR1); 452 seenusr1 = 0; 453 continue; 454 } 455 456 FD_COPY(&sockvec, &recvec); 457 signo = 0; 458 switch (select(maxfd + 1, &recvec, 0, 0, 0)) { 459 case -1: 460 if (errno != EINTR) { 461 fatal("select"); 462 /*NOTREACHED*/ 463 } 464 continue; 465 case 0: 466 continue; 467 default: 468 if (FD_ISSET(ripsock, &recvec)) { 469 sigprocmask(SIG_BLOCK, &mask, &omask); 470 riprecv(); 471 sigprocmask(SIG_SETMASK, &omask, NULL); 472 } 473 if (FD_ISSET(rtsock, &recvec)) { 474 sigprocmask(SIG_BLOCK, &mask, &omask); 475 rtrecv(); 476 sigprocmask(SIG_SETMASK, &omask, NULL); 477 } 478 } 479 } 480 } 481 482 void 483 sighandler(sig) 484 int sig; 485 { 486 487 signo = sig; 488 switch (signo) { 489 case SIGALRM: 490 seenalrm++; 491 break; 492 case SIGQUIT: 493 case SIGTERM: 494 seenquit++; 495 break; 496 case SIGUSR1: 497 case SIGHUP: 498 case SIGINT: 499 seenusr1++; 500 break; 501 } 502 } 503 504 /* 505 * gracefully exits after resetting sockopts. 506 */ 507 /* ARGSUSED */ 508 void 509 rtdexit() 510 { 511 struct riprt *rrt; 512 513 alarm(0); 514 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 515 if (rrt->rrt_rflags & RRTF_AGGREGATE) { 516 delroute(&rrt->rrt_info, &rrt->rrt_gw); 517 } 518 } 519 close(ripsock); 520 close(rtsock); 521 syslog(LOG_INFO, "**** Terminated ****"); 522 closelog(); 523 exit(1); 524 } 525 526 /* 527 * Called periodically: 528 * 1. age out the learned route. remove it if necessary. 529 * 2. submit RIP6_RESPONSE packets. 530 * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have 531 * to invoke this function in every 1 or 5 or 10 seconds only to age the 532 * routes more precisely. 533 */ 534 /* ARGSUSED */ 535 void 536 ripalarm() 537 { 538 struct ifc *ifcp; 539 struct riprt *rrt, *rrt_prev, *rrt_next; 540 time_t t_lifetime, t_holddown; 541 542 /* age the RIP routes */ 543 rrt_prev = 0; 544 t_lifetime = time(NULL) - RIP_LIFETIME; 545 t_holddown = t_lifetime - RIP_HOLDDOWN; 546 for (rrt = riprt; rrt; rrt = rrt_next) { 547 rrt_next = rrt->rrt_next; 548 549 if (rrt->rrt_t == 0) { 550 rrt_prev = rrt; 551 continue; 552 } 553 if (rrt->rrt_t < t_holddown) { 554 if (rrt_prev) { 555 rrt_prev->rrt_next = rrt->rrt_next; 556 } else { 557 riprt = rrt->rrt_next; 558 } 559 delroute(&rrt->rrt_info, &rrt->rrt_gw); 560 free(rrt); 561 continue; 562 } 563 if (rrt->rrt_t < t_lifetime) 564 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 565 rrt_prev = rrt; 566 } 567 /* Supply updates */ 568 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 569 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 570 ripsend(ifcp, &ifcp->ifc_ripsin, 0); 571 } 572 alarm(ripinterval(SUPPLY_INTERVAL6)); 573 } 574 575 void 576 init() 577 { 578 int i, int0, int255, error; 579 struct addrinfo hints, *res; 580 char port[10]; 581 582 ifc = (struct ifc *)NULL; 583 nifc = 0; 584 nindex2ifc = 0; /*initial guess*/ 585 index2ifc = NULL; 586 snprintf(port, sizeof(port), "%d", RIP6_PORT); 587 588 memset(&hints, 0, sizeof(hints)); 589 hints.ai_family = PF_INET6; 590 hints.ai_socktype = SOCK_DGRAM; 591 hints.ai_flags = AI_PASSIVE; 592 error = getaddrinfo(NULL, port, &hints, &res); 593 if (error) { 594 fatal("%s", gai_strerror(error)); 595 /*NOTREACHED*/ 596 } 597 if (res->ai_next) { 598 fatal(":: resolved to multiple address"); 599 /*NOTREACHED*/ 600 } 601 602 int0 = 0; int255 = 255; 603 ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 604 if (ripsock < 0) { 605 fatal("rip socket"); 606 /*NOTREACHED*/ 607 } 608 if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) { 609 fatal("rip bind"); 610 /*NOTREACHED*/ 611 } 612 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 613 &int255, sizeof(int255)) < 0) { 614 fatal("rip IPV6_MULTICAST_HOPS"); 615 /*NOTREACHED*/ 616 } 617 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 618 &int0, sizeof(int0)) < 0) { 619 fatal("rip IPV6_MULTICAST_LOOP"); 620 /*NOTREACHED*/ 621 } 622 623 i = 1; 624 #ifdef IPV6_RECVPKTINFO 625 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &i, 626 sizeof(i)) < 0) { 627 fatal("rip IPV6_RECVPKTINFO"); 628 /*NOTREACHED*/ 629 } 630 #else /* old adv. API */ 631 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO, &i, 632 sizeof(i)) < 0) { 633 fatal("rip IPV6_PKTINFO"); 634 /*NOTREACHED*/ 635 } 636 #endif 637 638 memset(&hints, 0, sizeof(hints)); 639 hints.ai_family = PF_INET6; 640 hints.ai_socktype = SOCK_DGRAM; 641 error = getaddrinfo(RIP6_DEST, port, &hints, &res); 642 if (error) { 643 fatal("%s", gai_strerror(error)); 644 /*NOTREACHED*/ 645 } 646 if (res->ai_next) { 647 fatal("%s resolved to multiple address", RIP6_DEST); 648 /*NOTREACHED*/ 649 } 650 memcpy(&ripsin, res->ai_addr, res->ai_addrlen); 651 652 #ifdef FD_ZERO 653 FD_ZERO(&sockvec); 654 #else 655 memset(&sockvec, 0, sizeof(sockvec)); 656 #endif 657 FD_SET(ripsock, &sockvec); 658 maxfd = ripsock; 659 660 if (nflag == 0) { 661 if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) { 662 fatal("route socket"); 663 /*NOTREACHED*/ 664 } 665 FD_SET(rtsock, &sockvec); 666 if (rtsock > maxfd) 667 maxfd = rtsock; 668 } else 669 rtsock = -1; /*just for safety */ 670 } 671 672 #define RIPSIZE(n) \ 673 (sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6)) 674 675 /* 676 * ripflush flushes the rip datagram stored in the rip buffer 677 */ 678 static int nrt; 679 static struct netinfo6 *np; 680 681 void 682 ripflush(ifcp, sin6) 683 struct ifc *ifcp; 684 struct sockaddr_in6 *sin6; 685 { 686 int i; 687 int error; 688 689 if (ifcp) 690 tracet(1, "Send(%s): info(%d) to %s.%d\n", 691 ifcp->ifc_name, nrt, 692 inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)); 693 else 694 tracet(1, "Send: info(%d) to %s.%d\n", 695 nrt, inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)); 696 if (dflag >= 2) { 697 np = ripbuf->rip6_nets; 698 for (i = 0; i < nrt; i++, np++) { 699 if (np->rip6_metric == NEXTHOP_METRIC) { 700 if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) 701 trace(2, " NextHop reset"); 702 else { 703 trace(2, " NextHop %s", 704 inet6_n2p(&np->rip6_dest)); 705 } 706 } else { 707 trace(2, " %s/%d[%d]", 708 inet6_n2p(&np->rip6_dest), 709 np->rip6_plen, np->rip6_metric); 710 } 711 if (np->rip6_tag) { 712 trace(2, " tag=0x%04x", 713 ntohs(np->rip6_tag) & 0xffff); 714 } 715 trace(2, "\n"); 716 } 717 } 718 error = sendpacket(sin6, RIPSIZE(nrt)); 719 if (error == EAFNOSUPPORT) { 720 /* Protocol not supported */ 721 tracet(1, "Could not send info to %s (%s): " 722 "set IFF_UP to 0\n", 723 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 724 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 725 } 726 nrt = 0; np = ripbuf->rip6_nets; 727 } 728 729 /* 730 * Generate RIP6_RESPONSE packets and send them. 731 */ 732 void 733 ripsend(ifcp, sin6, flag) 734 struct ifc *ifcp; 735 struct sockaddr_in6 *sin6; 736 int flag; 737 { 738 struct riprt *rrt; 739 struct in6_addr *nh; /* next hop */ 740 int maxrte; 741 742 if (qflag) 743 return; 744 745 if (ifcp == NULL) { 746 /* 747 * Request from non-link local address is not 748 * a regular route6d update. 749 */ 750 maxrte = (IFMINMTU - sizeof(struct ip6_hdr) - 751 sizeof(struct udphdr) - 752 sizeof(struct rip6) + sizeof(struct netinfo6)) / 753 sizeof(struct netinfo6); 754 nrt = 0; np = ripbuf->rip6_nets; nh = NULL; 755 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 756 if (rrt->rrt_rflags & RRTF_NOADVERTISE) 757 continue; 758 /* Put the route to the buffer */ 759 *np = rrt->rrt_info; 760 np++; nrt++; 761 if (nrt == maxrte) { 762 ripflush(NULL, sin6); 763 nh = NULL; 764 } 765 } 766 if (nrt) /* Send last packet */ 767 ripflush(NULL, sin6); 768 return; 769 } 770 771 if ((flag & RRTF_SENDANYWAY) == 0 && 772 (qflag || (ifcp->ifc_flags & IFF_LOOPBACK))) 773 return; 774 775 /* -N: no use */ 776 if (iff_find(ifcp, 'N') != NULL) 777 return; 778 779 /* -T: generate default route only */ 780 if (iff_find(ifcp, 'T') != NULL) { 781 struct netinfo6 rrt_info; 782 memset(&rrt_info, 0, sizeof(struct netinfo6)); 783 rrt_info.rip6_dest = in6addr_any; 784 rrt_info.rip6_plen = 0; 785 rrt_info.rip6_metric = 1; 786 rrt_info.rip6_metric += ifcp->ifc_metric; 787 rrt_info.rip6_tag = htons(routetag & 0xffff); 788 np = ripbuf->rip6_nets; 789 *np = rrt_info; 790 nrt = 1; 791 ripflush(ifcp, sin6); 792 return; 793 } 794 795 maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) - 796 sizeof(struct udphdr) - 797 sizeof(struct rip6) + sizeof(struct netinfo6)) / 798 sizeof(struct netinfo6); 799 800 nrt = 0; np = ripbuf->rip6_nets; nh = NULL; 801 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 802 if (rrt->rrt_rflags & RRTF_NOADVERTISE) 803 continue; 804 805 /* Need to check filter here */ 806 if (out_filter(rrt, ifcp) == 0) 807 continue; 808 809 /* Check split horizon and other conditions */ 810 if (tobeadv(rrt, ifcp) == 0) 811 continue; 812 813 /* Only considers the routes with flag if specified */ 814 if ((flag & RRTF_CHANGED) && 815 (rrt->rrt_rflags & RRTF_CHANGED) == 0) 816 continue; 817 818 /* Check nexthop */ 819 if (rrt->rrt_index == ifcp->ifc_index && 820 !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) && 821 (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) == 0) { 822 if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) { 823 if (nrt == maxrte - 2) 824 ripflush(ifcp, sin6); 825 np->rip6_dest = rrt->rrt_gw; 826 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) 827 SET_IN6_LINKLOCAL_IFINDEX(np->rip6_dest, 0); 828 np->rip6_plen = 0; 829 np->rip6_tag = 0; 830 np->rip6_metric = NEXTHOP_METRIC; 831 nh = &rrt->rrt_gw; 832 np++; nrt++; 833 } 834 } else if (nh && (rrt->rrt_index != ifcp->ifc_index || 835 !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) || 836 rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)) { 837 /* Reset nexthop */ 838 if (nrt == maxrte - 2) 839 ripflush(ifcp, sin6); 840 memset(np, 0, sizeof(struct netinfo6)); 841 np->rip6_metric = NEXTHOP_METRIC; 842 nh = NULL; 843 np++; nrt++; 844 } 845 846 /* Put the route to the buffer */ 847 *np = rrt->rrt_info; 848 np++; nrt++; 849 if (nrt == maxrte) { 850 ripflush(ifcp, sin6); 851 nh = NULL; 852 } 853 } 854 if (nrt) /* Send last packet */ 855 ripflush(ifcp, sin6); 856 } 857 858 /* 859 * outbound filter logic, per-route/interface. 860 */ 861 int 862 out_filter(rrt, ifcp) 863 struct riprt *rrt; 864 struct ifc *ifcp; 865 { 866 struct iff *iffp; 867 struct in6_addr ia; 868 int ok; 869 870 /* 871 * -A: filter out less specific routes, if we have aggregated 872 * route configured. 873 */ 874 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 875 if (iffp->iff_type != 'A') 876 continue; 877 if (rrt->rrt_info.rip6_plen <= iffp->iff_plen) 878 continue; 879 ia = rrt->rrt_info.rip6_dest; 880 applyplen(&ia, iffp->iff_plen); 881 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) 882 return 0; 883 } 884 885 /* 886 * if it is an aggregated route, advertise it only to the 887 * interfaces specified on -A. 888 */ 889 if ((rrt->rrt_rflags & RRTF_AGGREGATE) != 0) { 890 ok = 0; 891 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 892 if (iffp->iff_type != 'A') 893 continue; 894 if (rrt->rrt_info.rip6_plen == iffp->iff_plen && 895 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 896 &iffp->iff_addr)) { 897 ok = 1; 898 break; 899 } 900 } 901 if (!ok) 902 return 0; 903 } 904 905 /* 906 * -O: advertise only if prefix matches the configured prefix. 907 */ 908 if (iff_find(ifcp, 'O')) { 909 ok = 0; 910 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 911 if (iffp->iff_type != 'O') 912 continue; 913 if (rrt->rrt_info.rip6_plen < iffp->iff_plen) 914 continue; 915 ia = rrt->rrt_info.rip6_dest; 916 applyplen(&ia, iffp->iff_plen); 917 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 918 ok = 1; 919 break; 920 } 921 } 922 if (!ok) 923 return 0; 924 } 925 926 /* the prefix should be advertised */ 927 return 1; 928 } 929 930 /* 931 * Determine if the route is to be advertised on the specified interface. 932 * It checks options specified in the arguments and the split horizon rule. 933 */ 934 int 935 tobeadv(rrt, ifcp) 936 struct riprt *rrt; 937 struct ifc *ifcp; 938 { 939 940 /* Special care for static routes */ 941 if (rrt->rrt_flags & RTF_STATIC) { 942 /* XXX don't advertise reject/blackhole routes */ 943 if (rrt->rrt_flags & (RTF_REJECT | RTF_BLACKHOLE)) 944 return 0; 945 946 if (Sflag) /* Yes, advertise it anyway */ 947 return 1; 948 if (sflag && rrt->rrt_index != ifcp->ifc_index) 949 return 1; 950 return 0; 951 } 952 /* Regular split horizon */ 953 if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index) 954 return 0; 955 return 1; 956 } 957 958 /* 959 * Send a rip packet actually. 960 */ 961 int 962 sendpacket(sin6, len) 963 struct sockaddr_in6 *sin6; 964 int len; 965 { 966 struct msghdr m; 967 struct cmsghdr *cm; 968 struct iovec iov[2]; 969 u_char cmsgbuf[256]; 970 struct in6_pktinfo *pi; 971 int idx; 972 struct sockaddr_in6 sincopy; 973 974 /* do not overwrite the given sin */ 975 sincopy = *sin6; 976 sin6 = &sincopy; 977 978 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 979 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 980 /* XXX: do not mix the interface index and link index */ 981 idx = IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr); 982 SET_IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr, 0); 983 sin6->sin6_scope_id = idx; 984 } else 985 idx = 0; 986 987 m.msg_name = (caddr_t)sin6; 988 m.msg_namelen = sizeof(*sin6); 989 iov[0].iov_base = (caddr_t)ripbuf; 990 iov[0].iov_len = len; 991 m.msg_iov = iov; 992 m.msg_iovlen = 1; 993 if (!idx) { 994 m.msg_control = NULL; 995 m.msg_controllen = 0; 996 } else { 997 memset(cmsgbuf, 0, sizeof(cmsgbuf)); 998 cm = (struct cmsghdr *)cmsgbuf; 999 m.msg_control = (caddr_t)cm; 1000 m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); 1001 1002 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 1003 cm->cmsg_level = IPPROTO_IPV6; 1004 cm->cmsg_type = IPV6_PKTINFO; 1005 pi = (struct in6_pktinfo *)CMSG_DATA(cm); 1006 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/ 1007 pi->ipi6_ifindex = idx; 1008 } 1009 1010 if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) { 1011 trace(1, "sendmsg: %s\n", strerror(errno)); 1012 return errno; 1013 } 1014 1015 return 0; 1016 } 1017 1018 /* 1019 * Receive and process RIP packets. Update the routes/kernel forwarding 1020 * table if necessary. 1021 */ 1022 void 1023 riprecv() 1024 { 1025 struct ifc *ifcp, *ic; 1026 struct sockaddr_in6 fsock; 1027 struct in6_addr nh; /* next hop */ 1028 struct rip6 *rp; 1029 struct netinfo6 *np, *nq; 1030 struct riprt *rrt; 1031 ssize_t len, nn, need_trigger, idx; 1032 char buf[4 * RIP6_MAXMTU]; 1033 time_t t; 1034 struct msghdr m; 1035 struct cmsghdr *cm; 1036 struct iovec iov[2]; 1037 u_char cmsgbuf[256]; 1038 struct in6_pktinfo *pi; 1039 struct iff *iffp; 1040 struct in6_addr ia; 1041 int ok; 1042 time_t t_half_lifetime; 1043 1044 need_trigger = 0; 1045 1046 m.msg_name = (caddr_t)&fsock; 1047 m.msg_namelen = sizeof(fsock); 1048 iov[0].iov_base = (caddr_t)buf; 1049 iov[0].iov_len = sizeof(buf); 1050 m.msg_iov = iov; 1051 m.msg_iovlen = 1; 1052 cm = (struct cmsghdr *)cmsgbuf; 1053 m.msg_control = (caddr_t)cm; 1054 m.msg_controllen = sizeof(cmsgbuf); 1055 if ((len = recvmsg(ripsock, &m, 0)) < 0) { 1056 fatal("recvmsg"); 1057 /*NOTREACHED*/ 1058 } 1059 idx = 0; 1060 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m); 1061 cm; 1062 cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) { 1063 if (cm->cmsg_level == IPPROTO_IPV6 && 1064 cm->cmsg_type == IPV6_PKTINFO) { 1065 pi = (struct in6_pktinfo *)(CMSG_DATA(cm)); 1066 idx = pi->ipi6_ifindex; 1067 break; 1068 } 1069 } 1070 if (idx && IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) 1071 SET_IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr, idx); 1072 1073 if (len < sizeof(struct rip6)) { 1074 trace(1, "Packet too short\n"); 1075 return; 1076 } 1077 1078 nh = fsock.sin6_addr; 1079 nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 1080 sizeof(struct netinfo6); 1081 rp = (struct rip6 *)buf; 1082 np = rp->rip6_nets; 1083 1084 if (rp->rip6_vers != RIP6_VERSION) { 1085 trace(1, "Incorrect RIP version %d\n", rp->rip6_vers); 1086 return; 1087 } 1088 if (rp->rip6_cmd == RIP6_REQUEST) { 1089 if (idx && idx < nindex2ifc) { 1090 ifcp = index2ifc[idx]; 1091 riprequest(ifcp, np, nn, &fsock); 1092 } else { 1093 riprequest(NULL, np, nn, &fsock); 1094 } 1095 return; 1096 } 1097 1098 if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) { 1099 trace(1, "Packets from non-ll addr: %s\n", 1100 inet6_n2p(&fsock.sin6_addr)); 1101 return; /* Ignore packets from non-link-local addr */ 1102 } 1103 idx = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr); 1104 ifcp = (idx < nindex2ifc) ? index2ifc[idx] : NULL; 1105 if (!ifcp) { 1106 trace(1, "Packets to unknown interface index %d\n", idx); 1107 return; /* Ignore it */ 1108 } 1109 if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr)) 1110 return; /* The packet is from me; ignore */ 1111 if (rp->rip6_cmd != RIP6_RESPONSE) { 1112 trace(1, "Invalid command %d\n", rp->rip6_cmd); 1113 return; 1114 } 1115 1116 /* -N: no use */ 1117 if (iff_find(ifcp, 'N') != NULL) 1118 return; 1119 1120 tracet(1, "Recv(%s): from %s.%d info(%d)\n", 1121 ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), (int)nn); 1122 1123 t = time(NULL); 1124 t_half_lifetime = t - (RIP_LIFETIME/2); 1125 for (; nn; nn--, np++) { 1126 if (np->rip6_metric == NEXTHOP_METRIC) { 1127 /* modify neighbor address */ 1128 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 1129 nh = np->rip6_dest; 1130 SET_IN6_LINKLOCAL_IFINDEX(nh, idx); 1131 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 1132 } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) { 1133 nh = fsock.sin6_addr; 1134 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 1135 } else { 1136 nh = fsock.sin6_addr; 1137 trace(1, "\tInvalid Nexthop: %s\n", 1138 inet6_n2p(&np->rip6_dest)); 1139 } 1140 continue; 1141 } 1142 if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) { 1143 trace(1, "\tMulticast netinfo6: %s/%d [%d]\n", 1144 inet6_n2p(&np->rip6_dest), 1145 np->rip6_plen, np->rip6_metric); 1146 continue; 1147 } 1148 if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) { 1149 trace(1, "\tLoopback netinfo6: %s/%d [%d]\n", 1150 inet6_n2p(&np->rip6_dest), 1151 np->rip6_plen, np->rip6_metric); 1152 continue; 1153 } 1154 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 1155 trace(1, "\tLink Local netinfo6: %s/%d [%d]\n", 1156 inet6_n2p(&np->rip6_dest), 1157 np->rip6_plen, np->rip6_metric); 1158 continue; 1159 } 1160 /* may need to pass sitelocal prefix in some case, however*/ 1161 if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) { 1162 trace(1, "\tSite Local netinfo6: %s/%d [%d]\n", 1163 inet6_n2p(&np->rip6_dest), 1164 np->rip6_plen, np->rip6_metric); 1165 continue; 1166 } 1167 trace(2, "\tnetinfo6: %s/%d [%d]", 1168 inet6_n2p(&np->rip6_dest), 1169 np->rip6_plen, np->rip6_metric); 1170 if (np->rip6_tag) 1171 trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff); 1172 if (dflag >= 2) { 1173 ia = np->rip6_dest; 1174 applyplen(&ia, np->rip6_plen); 1175 if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest)) 1176 trace(2, " [junk outside prefix]"); 1177 } 1178 1179 /* 1180 * -L: listen only if the prefix matches the configuration 1181 */ 1182 ok = 1; /* if there's no L filter, it is ok */ 1183 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 1184 if (iffp->iff_type != 'L') 1185 continue; 1186 ok = 0; 1187 if (np->rip6_plen < iffp->iff_plen) 1188 continue; 1189 /* special rule: ::/0 means default, not "in /0" */ 1190 if (iffp->iff_plen == 0 && np->rip6_plen > 0) 1191 continue; 1192 ia = np->rip6_dest; 1193 applyplen(&ia, iffp->iff_plen); 1194 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 1195 ok = 1; 1196 break; 1197 } 1198 } 1199 if (!ok) { 1200 trace(2, " (filtered)\n"); 1201 continue; 1202 } 1203 1204 trace(2, "\n"); 1205 np->rip6_metric++; 1206 np->rip6_metric += ifcp->ifc_metric; 1207 if (np->rip6_metric > HOPCNT_INFINITY6) 1208 np->rip6_metric = HOPCNT_INFINITY6; 1209 1210 applyplen(&np->rip6_dest, np->rip6_plen); 1211 if ((rrt = rtsearch(np, NULL)) != NULL) { 1212 if (rrt->rrt_t == 0) 1213 continue; /* Intf route has priority */ 1214 nq = &rrt->rrt_info; 1215 if (nq->rip6_metric > np->rip6_metric) { 1216 if (rrt->rrt_index == ifcp->ifc_index && 1217 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 1218 /* Small metric from the same gateway */ 1219 nq->rip6_metric = np->rip6_metric; 1220 } else { 1221 /* Better route found */ 1222 rrt->rrt_index = ifcp->ifc_index; 1223 /* Update routing table */ 1224 delroute(nq, &rrt->rrt_gw); 1225 rrt->rrt_gw = nh; 1226 *nq = *np; 1227 addroute(rrt, &nh, ifcp); 1228 } 1229 rrt->rrt_rflags |= RRTF_CHANGED; 1230 rrt->rrt_t = t; 1231 need_trigger = 1; 1232 } else if (nq->rip6_metric < np->rip6_metric && 1233 rrt->rrt_index == ifcp->ifc_index && 1234 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 1235 /* Got worse route from same gw */ 1236 nq->rip6_metric = np->rip6_metric; 1237 rrt->rrt_t = t; 1238 rrt->rrt_rflags |= RRTF_CHANGED; 1239 need_trigger = 1; 1240 } else if (nq->rip6_metric == np->rip6_metric && 1241 np->rip6_metric < HOPCNT_INFINITY6) { 1242 if (rrt->rrt_index == ifcp->ifc_index && 1243 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 1244 /* same metric, same route from same gw */ 1245 rrt->rrt_t = t; 1246 } else if (rrt->rrt_t < t_half_lifetime) { 1247 /* Better route found */ 1248 rrt->rrt_index = ifcp->ifc_index; 1249 /* Update routing table */ 1250 delroute(nq, &rrt->rrt_gw); 1251 rrt->rrt_gw = nh; 1252 *nq = *np; 1253 addroute(rrt, &nh, ifcp); 1254 rrt->rrt_rflags |= RRTF_CHANGED; 1255 rrt->rrt_t = t; 1256 } 1257 } 1258 /* 1259 * if nq->rip6_metric == HOPCNT_INFINITY6 then 1260 * do not update age value. Do nothing. 1261 */ 1262 } else if (np->rip6_metric < HOPCNT_INFINITY6) { 1263 /* Got a new valid route */ 1264 if ((rrt = MALLOC(struct riprt)) == NULL) { 1265 fatal("malloc: struct riprt"); 1266 /*NOTREACHED*/ 1267 } 1268 memset(rrt, 0, sizeof(*rrt)); 1269 nq = &rrt->rrt_info; 1270 1271 rrt->rrt_same = NULL; 1272 rrt->rrt_index = ifcp->ifc_index; 1273 rrt->rrt_flags = RTF_UP|RTF_GATEWAY; 1274 rrt->rrt_gw = nh; 1275 *nq = *np; 1276 applyplen(&nq->rip6_dest, nq->rip6_plen); 1277 if (nq->rip6_plen == sizeof(struct in6_addr) * 8) 1278 rrt->rrt_flags |= RTF_HOST; 1279 1280 /* Put the route to the list */ 1281 rrt->rrt_next = riprt; 1282 riprt = rrt; 1283 /* Update routing table */ 1284 addroute(rrt, &nh, ifcp); 1285 rrt->rrt_rflags |= RRTF_CHANGED; 1286 need_trigger = 1; 1287 rrt->rrt_t = t; 1288 } 1289 } 1290 /* XXX need to care the interval between triggered updates */ 1291 if (need_trigger) { 1292 if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) { 1293 for (ic = ifc; ic; ic = ic->ifc_next) { 1294 if (ifcp->ifc_index == ic->ifc_index) 1295 continue; 1296 if (ic->ifc_flags & IFF_UP) 1297 ripsend(ic, &ic->ifc_ripsin, 1298 RRTF_CHANGED); 1299 } 1300 } 1301 /* Reset the flag */ 1302 for (rrt = riprt; rrt; rrt = rrt->rrt_next) 1303 rrt->rrt_rflags &= ~RRTF_CHANGED; 1304 } 1305 } 1306 1307 /* 1308 * Send all routes request packet to the specified interface. 1309 */ 1310 void 1311 sendrequest(ifcp) 1312 struct ifc *ifcp; 1313 { 1314 struct netinfo6 *np; 1315 int error; 1316 1317 if (ifcp->ifc_flags & IFF_LOOPBACK) 1318 return; 1319 ripbuf->rip6_cmd = RIP6_REQUEST; 1320 np = ripbuf->rip6_nets; 1321 memset(np, 0, sizeof(struct netinfo6)); 1322 np->rip6_metric = HOPCNT_INFINITY6; 1323 tracet(1, "Send rtdump Request to %s (%s)\n", 1324 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 1325 error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1)); 1326 if (error == EAFNOSUPPORT) { 1327 /* Protocol not supported */ 1328 tracet(1, "Could not send rtdump Request to %s (%s): " 1329 "set IFF_UP to 0\n", 1330 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 1331 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 1332 } 1333 ripbuf->rip6_cmd = RIP6_RESPONSE; 1334 } 1335 1336 /* 1337 * Process a RIP6_REQUEST packet. 1338 */ 1339 void 1340 riprequest(ifcp, np, nn, sin6) 1341 struct ifc *ifcp; 1342 struct netinfo6 *np; 1343 int nn; 1344 struct sockaddr_in6 *sin6; 1345 { 1346 int i; 1347 struct riprt *rrt; 1348 1349 if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) && 1350 np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) { 1351 /* Specific response, don't split-horizon */ 1352 trace(1, "\tRIP Request\n"); 1353 for (i = 0; i < nn; i++, np++) { 1354 rrt = rtsearch(np, NULL); 1355 if (rrt) 1356 np->rip6_metric = rrt->rrt_info.rip6_metric; 1357 else 1358 np->rip6_metric = HOPCNT_INFINITY6; 1359 } 1360 (void)sendpacket(sin6, RIPSIZE(nn)); 1361 return; 1362 } 1363 /* Whole routing table dump */ 1364 trace(1, "\tRIP Request -- whole routing table\n"); 1365 ripsend(ifcp, sin6, RRTF_SENDANYWAY); 1366 } 1367 1368 /* 1369 * Get information of each interface. 1370 */ 1371 void 1372 ifconfig() 1373 { 1374 struct ifaddrs *ifap, *ifa; 1375 struct ifc *ifcp; 1376 struct ipv6_mreq mreq; 1377 int s; 1378 1379 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 1380 fatal("socket"); 1381 /*NOTREACHED*/ 1382 } 1383 1384 if (getifaddrs(&ifap) != 0) { 1385 fatal("getifaddrs"); 1386 /*NOTREACHED*/ 1387 } 1388 1389 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1390 if (ifa->ifa_addr->sa_family != AF_INET6) 1391 continue; 1392 ifcp = ifc_find(ifa->ifa_name); 1393 /* we are interested in multicast-capable interfaces */ 1394 if ((ifa->ifa_flags & IFF_MULTICAST) == 0) 1395 continue; 1396 if (!ifcp) { 1397 /* new interface */ 1398 if ((ifcp = MALLOC(struct ifc)) == NULL) { 1399 fatal("malloc: struct ifc"); 1400 /*NOTREACHED*/ 1401 } 1402 memset(ifcp, 0, sizeof(*ifcp)); 1403 ifcp->ifc_index = -1; 1404 ifcp->ifc_next = ifc; 1405 ifc = ifcp; 1406 nifc++; 1407 ifcp->ifc_name = allocopy(ifa->ifa_name); 1408 ifcp->ifc_addr = 0; 1409 ifcp->ifc_filter = 0; 1410 ifcp->ifc_flags = ifa->ifa_flags; 1411 trace(1, "newif %s <%s>\n", ifcp->ifc_name, 1412 ifflags(ifcp->ifc_flags)); 1413 if (!strcmp(ifcp->ifc_name, LOOPBACK_IF)) 1414 loopifcp = ifcp; 1415 } else { 1416 /* update flag, this may be up again */ 1417 if (ifcp->ifc_flags != ifa->ifa_flags) { 1418 trace(1, "%s: <%s> -> ", ifcp->ifc_name, 1419 ifflags(ifcp->ifc_flags)); 1420 trace(1, "<%s>\n", ifflags(ifa->ifa_flags)); 1421 ifcp->ifc_cflags |= IFC_CHANGED; 1422 } 1423 ifcp->ifc_flags = ifa->ifa_flags; 1424 } 1425 ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s); 1426 if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP 1427 && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { 1428 mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; 1429 mreq.ipv6mr_interface = ifcp->ifc_index; 1430 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_JOIN_GROUP, 1431 &mreq, sizeof(mreq)) < 0) { 1432 fatal("IPV6_JOIN_GROUP"); 1433 /*NOTREACHED*/ 1434 } 1435 trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST); 1436 ifcp->ifc_joined++; 1437 } 1438 } 1439 close(s); 1440 freeifaddrs(ifap); 1441 } 1442 1443 void 1444 ifconfig1(name, sa, ifcp, s) 1445 const char *name; 1446 const struct sockaddr *sa; 1447 struct ifc *ifcp; 1448 int s; 1449 { 1450 struct in6_ifreq ifr; 1451 const struct sockaddr_in6 *sin6; 1452 struct ifac *ifa; 1453 int plen; 1454 char buf[BUFSIZ]; 1455 1456 sin6 = (const struct sockaddr_in6 *)sa; 1457 if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && !lflag) 1458 return; 1459 ifr.ifr_addr = *sin6; 1460 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 1461 if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) { 1462 fatal("ioctl: SIOCGIFNETMASK_IN6"); 1463 /*NOTREACHED*/ 1464 } 1465 plen = sin6mask2len(&ifr.ifr_addr); 1466 if ((ifa = ifa_match(ifcp, &sin6->sin6_addr, plen)) != NULL) { 1467 /* same interface found */ 1468 /* need check if something changed */ 1469 /* XXX not yet implemented */ 1470 return; 1471 } 1472 /* 1473 * New address is found 1474 */ 1475 if ((ifa = MALLOC(struct ifac)) == NULL) { 1476 fatal("malloc: struct ifac"); 1477 /*NOTREACHED*/ 1478 } 1479 memset(ifa, 0, sizeof(*ifa)); 1480 ifa->ifa_conf = ifcp; 1481 ifa->ifa_next = ifcp->ifc_addr; 1482 ifcp->ifc_addr = ifa; 1483 ifa->ifa_addr = sin6->sin6_addr; 1484 ifa->ifa_plen = plen; 1485 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1486 ifr.ifr_addr = *sin6; 1487 if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) { 1488 fatal("ioctl: SIOCGIFDSTADDR_IN6"); 1489 /*NOTREACHED*/ 1490 } 1491 ifa->ifa_raddr = ifr.ifr_dstaddr.sin6_addr; 1492 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, buf, sizeof(buf)); 1493 trace(1, "found address %s/%d -- %s\n", 1494 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen, buf); 1495 } else { 1496 trace(1, "found address %s/%d\n", 1497 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen); 1498 } 1499 if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) { 1500 ifcp->ifc_mylladdr = ifa->ifa_addr; 1501 ifcp->ifc_index = IN6_LINKLOCAL_IFINDEX(ifa->ifa_addr); 1502 memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len); 1503 SET_IN6_LINKLOCAL_IFINDEX(ifcp->ifc_ripsin.sin6_addr, 1504 ifcp->ifc_index); 1505 setindex2ifc(ifcp->ifc_index, ifcp); 1506 ifcp->ifc_mtu = getifmtu(ifcp->ifc_index); 1507 if (ifcp->ifc_mtu > RIP6_MAXMTU) 1508 ifcp->ifc_mtu = RIP6_MAXMTU; 1509 if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) { 1510 fatal("ioctl: SIOCGIFMETRIC"); 1511 /*NOTREACHED*/ 1512 } 1513 ifcp->ifc_metric = ifr.ifr_metric; 1514 trace(1, "\tindex: %d, mtu: %d, metric: %d\n", 1515 ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric); 1516 } else 1517 ifcp->ifc_cflags |= IFC_CHANGED; 1518 } 1519 1520 /* 1521 * Receive and process routing messages. 1522 * Update interface information as necesssary. 1523 */ 1524 void 1525 rtrecv() 1526 { 1527 char buf[BUFSIZ]; 1528 char *p, *q; 1529 struct rt_msghdr *rtm; 1530 struct ifa_msghdr *ifam; 1531 struct if_msghdr *ifm; 1532 int len; 1533 struct ifc *ifcp, *ic; 1534 int iface = 0, rtable = 0; 1535 struct sockaddr_in6 *rta[RTAX_MAX]; 1536 struct sockaddr_in6 mask; 1537 int i, addrs; 1538 struct riprt *rrt; 1539 1540 if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 1541 perror("read from rtsock"); 1542 exit(1); 1543 } 1544 if (len < sizeof(*rtm)) { 1545 trace(1, "short read from rtsock: %d (should be > %lu)\n", 1546 len, (u_long)sizeof(*rtm)); 1547 return; 1548 } 1549 if (dflag >= 2) { 1550 fprintf(stderr, "rtmsg:\n"); 1551 for (i = 0; i < len; i++) { 1552 fprintf(stderr, "%02x ", buf[i] & 0xff); 1553 if (i % 16 == 15) fprintf(stderr, "\n"); 1554 } 1555 fprintf(stderr, "\n"); 1556 } 1557 1558 for (p = buf; p - buf < len; p += ((struct rt_msghdr *)p)->rtm_msglen) { 1559 /* safety against bogus message */ 1560 if (((struct rt_msghdr *)p)->rtm_msglen <= 0) { 1561 trace(1, "bogus rtmsg: length=%d\n", 1562 ((struct rt_msghdr *)p)->rtm_msglen); 1563 break; 1564 } 1565 rtm = NULL; 1566 ifam = NULL; 1567 ifm = NULL; 1568 switch (((struct rt_msghdr *)p)->rtm_type) { 1569 case RTM_NEWADDR: 1570 case RTM_DELADDR: 1571 ifam = (struct ifa_msghdr *)p; 1572 addrs = ifam->ifam_addrs; 1573 q = (char *)(ifam + 1); 1574 break; 1575 case RTM_IFINFO: 1576 ifm = (struct if_msghdr *)p; 1577 addrs = ifm->ifm_addrs; 1578 q = (char *)(ifm + 1); 1579 break; 1580 default: 1581 rtm = (struct rt_msghdr *)p; 1582 addrs = rtm->rtm_addrs; 1583 q = (char *)(rtm + 1); 1584 if (rtm->rtm_version != RTM_VERSION) { 1585 trace(1, "unexpected rtmsg version %d " 1586 "(should be %d)\n", 1587 rtm->rtm_version, RTM_VERSION); 1588 continue; 1589 } 1590 if (rtm->rtm_pid == pid) { 1591 #if 0 1592 trace(1, "rtmsg looped back to me, ignored\n"); 1593 #endif 1594 continue; 1595 } 1596 break; 1597 } 1598 memset(&rta, 0, sizeof(rta)); 1599 for (i = 0; i < RTAX_MAX; i++) { 1600 if (addrs & (1 << i)) { 1601 rta[i] = (struct sockaddr_in6 *)q; 1602 q += ROUNDUP(rta[i]->sin6_len); 1603 } 1604 } 1605 1606 trace(1, "rtsock: %s (addrs=%x)\n", 1607 rttypes((struct rt_msghdr *)p), addrs); 1608 if (dflag >= 2) { 1609 for (i = 0; 1610 i < ((struct rt_msghdr *)p)->rtm_msglen; 1611 i++) { 1612 fprintf(stderr, "%02x ", p[i] & 0xff); 1613 if (i % 16 == 15) fprintf(stderr, "\n"); 1614 } 1615 fprintf(stderr, "\n"); 1616 } 1617 1618 /* 1619 * Easy ones first. 1620 * 1621 * We may be able to optimize by using ifm->ifm_index or 1622 * ifam->ifam_index. For simplicity we don't do that here. 1623 */ 1624 switch (((struct rt_msghdr *)p)->rtm_type) { 1625 case RTM_NEWADDR: 1626 case RTM_IFINFO: 1627 iface++; 1628 continue; 1629 case RTM_ADD: 1630 rtable++; 1631 continue; 1632 case RTM_LOSING: 1633 case RTM_MISS: 1634 case RTM_RESOLVE: 1635 case RTM_GET: 1636 case RTM_LOCK: 1637 /* nothing to be done here */ 1638 trace(1, "\tnothing to be done, ignored\n"); 1639 continue; 1640 } 1641 1642 #if 0 1643 if (rta[RTAX_DST] == NULL) { 1644 trace(1, "\tno destination, ignored\n"); 1645 continue; 1646 } 1647 if (rta[RTAX_DST]->sin6_family != AF_INET6) { 1648 trace(1, "\taf mismatch, ignored\n"); 1649 continue; 1650 } 1651 if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) { 1652 trace(1, "\tlinklocal destination, ignored\n"); 1653 continue; 1654 } 1655 if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) { 1656 trace(1, "\tloopback destination, ignored\n"); 1657 continue; /* Loopback */ 1658 } 1659 if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) { 1660 trace(1, "\tmulticast destination, ignored\n"); 1661 continue; 1662 } 1663 #endif 1664 1665 /* hard ones */ 1666 switch (((struct rt_msghdr *)p)->rtm_type) { 1667 case RTM_NEWADDR: 1668 case RTM_IFINFO: 1669 case RTM_ADD: 1670 case RTM_LOSING: 1671 case RTM_MISS: 1672 case RTM_RESOLVE: 1673 case RTM_GET: 1674 case RTM_LOCK: 1675 /* should already be handled */ 1676 fatal("rtrecv: never reach here"); 1677 /*NOTREACHED*/ 1678 case RTM_DELETE: 1679 if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY]) { 1680 trace(1, "\tsome of dst/gw/netamsk are " 1681 "unavailable, ignored\n"); 1682 break; 1683 } 1684 if ((rtm->rtm_flags & RTF_HOST) != 0) { 1685 mask.sin6_len = sizeof(mask); 1686 memset(&mask.sin6_addr, 0xff, 1687 sizeof(mask.sin6_addr)); 1688 rta[RTAX_NETMASK] = &mask; 1689 } else if (!rta[RTAX_NETMASK]) { 1690 trace(1, "\tsome of dst/gw/netamsk are " 1691 "unavailable, ignored\n"); 1692 break; 1693 } 1694 if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY], 1695 rta[RTAX_NETMASK]) == 0) { 1696 rtable++; /*just to be sure*/ 1697 } 1698 break; 1699 case RTM_CHANGE: 1700 case RTM_REDIRECT: 1701 trace(1, "\tnot supported yet, ignored\n"); 1702 break; 1703 case RTM_DELADDR: 1704 if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) { 1705 trace(1, "\tno netmask or ifa given, ignored\n"); 1706 break; 1707 } 1708 if (ifam->ifam_index < nindex2ifc) 1709 ifcp = index2ifc[ifam->ifam_index]; 1710 else 1711 ifcp = NULL; 1712 if (!ifcp) { 1713 trace(1, "\tinvalid ifam_index %d, ignored\n", 1714 ifam->ifam_index); 1715 break; 1716 } 1717 if (!rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK])) 1718 iface++; 1719 break; 1720 case RTM_OLDADD: 1721 case RTM_OLDDEL: 1722 trace(1, "\tnot supported yet, ignored\n"); 1723 break; 1724 } 1725 1726 } 1727 1728 if (iface) { 1729 trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n"); 1730 ifconfig(); 1731 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) 1732 if (ifcp->ifc_cflags & IFC_CHANGED) { 1733 if (ifrt(ifcp, 1)) { 1734 for (ic = ifc; ic; ic = ic->ifc_next) { 1735 if (ifcp->ifc_index == ic->ifc_index) 1736 continue; 1737 if (ic->ifc_flags & IFF_UP) 1738 ripsend(ic, &ic->ifc_ripsin, 1739 RRTF_CHANGED); 1740 } 1741 /* Reset the flag */ 1742 for (rrt = riprt; rrt; rrt = rrt->rrt_next) 1743 rrt->rrt_rflags &= ~RRTF_CHANGED; 1744 } 1745 ifcp->ifc_cflags &= ~IFC_CHANGED; 1746 } 1747 } 1748 if (rtable) { 1749 trace(1, "rtsock: read routing table again\n"); 1750 krtread(1); 1751 } 1752 } 1753 1754 /* 1755 * remove specified route from the internal routing table. 1756 */ 1757 int 1758 rt_del(sdst, sgw, smask) 1759 const struct sockaddr_in6 *sdst; 1760 const struct sockaddr_in6 *sgw; 1761 const struct sockaddr_in6 *smask; 1762 { 1763 const struct in6_addr *dst = NULL; 1764 const struct in6_addr *gw = NULL; 1765 int prefix; 1766 struct netinfo6 ni6; 1767 struct riprt *rrt = NULL; 1768 time_t t_lifetime; 1769 1770 if (sdst->sin6_family != AF_INET6) { 1771 trace(1, "\tother AF, ignored\n"); 1772 return -1; 1773 } 1774 if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr) 1775 || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback) 1776 || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) { 1777 trace(1, "\taddress %s not interesting, ignored\n", 1778 inet6_n2p(&sdst->sin6_addr)); 1779 return -1; 1780 } 1781 dst = &sdst->sin6_addr; 1782 if (sgw->sin6_family == AF_INET6) { 1783 /* easy case */ 1784 gw = &sgw->sin6_addr; 1785 prefix = sin6mask2len(smask); 1786 } else if (sgw->sin6_family == AF_LINK) { 1787 /* 1788 * Interface route... a hard case. We need to get the prefix 1789 * length from the kernel, but we now are parsing rtmsg. 1790 * We'll purge matching routes from my list, then get the 1791 * fresh list. 1792 */ 1793 struct riprt *longest; 1794 trace(1, "\t%s is an interface route, guessing prefixlen\n", 1795 inet6_n2p(dst)); 1796 longest = NULL; 1797 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 1798 if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 1799 &sdst->sin6_addr) 1800 && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) { 1801 if (!longest 1802 || longest->rrt_info.rip6_plen < 1803 rrt->rrt_info.rip6_plen) { 1804 longest = rrt; 1805 } 1806 } 1807 } 1808 rrt = longest; 1809 if (!rrt) { 1810 trace(1, "\tno matching interface route found\n"); 1811 return -1; 1812 } 1813 gw = &in6addr_loopback; 1814 prefix = rrt->rrt_info.rip6_plen; 1815 } else { 1816 trace(1, "\tunsupported af: (gw=%d)\n", sgw->sin6_family); 1817 return -1; 1818 } 1819 1820 trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix); 1821 trace(1, "gw %s\n", inet6_n2p(gw)); 1822 t_lifetime = time(NULL) - RIP_LIFETIME; 1823 /* age route for interface address */ 1824 memset(&ni6, 0, sizeof(ni6)); 1825 ni6.rip6_dest = *dst; 1826 ni6.rip6_plen = prefix; 1827 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 1828 trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest), 1829 ni6.rip6_plen); 1830 if (!rrt && (rrt = rtsearch(&ni6, NULL)) == NULL) { 1831 trace(1, "\tno route found\n"); 1832 return -1; 1833 } 1834 #if 0 1835 if ((rrt->rrt_flags & RTF_STATIC) == 0) { 1836 trace(1, "\tyou can delete static routes only\n"); 1837 } else 1838 #endif 1839 if (!IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, gw)) { 1840 trace(1, "\tgw mismatch: %s <-> ", 1841 inet6_n2p(&rrt->rrt_gw)); 1842 trace(1, "%s\n", inet6_n2p(gw)); 1843 } else { 1844 trace(1, "\troute found, age it\n"); 1845 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1846 rrt->rrt_t = t_lifetime; 1847 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 1848 } 1849 } 1850 return 0; 1851 } 1852 1853 /* 1854 * remove specified address from internal interface/routing table. 1855 */ 1856 int 1857 rt_deladdr(ifcp, sifa, smask) 1858 struct ifc *ifcp; 1859 const struct sockaddr_in6 *sifa; 1860 const struct sockaddr_in6 *smask; 1861 { 1862 const struct in6_addr *addr = NULL; 1863 int prefix; 1864 struct ifac *ifa = NULL; 1865 struct netinfo6 ni6; 1866 struct riprt *rrt = NULL; 1867 time_t t_lifetime; 1868 int updated = 0; 1869 1870 if (sifa->sin6_family != AF_INET6) { 1871 trace(1, "\tother AF, ignored\n"); 1872 return -1; 1873 } 1874 addr = &sifa->sin6_addr; 1875 prefix = sin6mask2len(smask); 1876 1877 trace(1, "\tdeleting %s/%d from %s\n", 1878 inet6_n2p(addr), prefix, ifcp->ifc_name); 1879 ifa = ifa_match(ifcp, addr, prefix); 1880 if (!ifa) { 1881 trace(1, "\tno matching ifa found for %s/%d on %s\n", 1882 inet6_n2p(addr), prefix, ifcp->ifc_name); 1883 return -1; 1884 } 1885 if (ifa->ifa_conf != ifcp) { 1886 trace(1, "\taddress table corrupt: back pointer does not match " 1887 "(%s != %s)\n", 1888 ifcp->ifc_name, ifa->ifa_conf->ifc_name); 1889 return -1; 1890 } 1891 /* remove ifa from interface */ 1892 if (ifcp->ifc_addr == ifa) 1893 ifcp->ifc_addr = ifa->ifa_next; 1894 else { 1895 struct ifac *p; 1896 for (p = ifcp->ifc_addr; p; p = p->ifa_next) { 1897 if (p->ifa_next == ifa) { 1898 p->ifa_next = ifa->ifa_next; 1899 break; 1900 } 1901 } 1902 } 1903 ifa->ifa_next = NULL; 1904 ifa->ifa_conf = NULL; 1905 t_lifetime = time(NULL) - RIP_LIFETIME; 1906 /* age route for interface address */ 1907 memset(&ni6, 0, sizeof(ni6)); 1908 ni6.rip6_dest = ifa->ifa_addr; 1909 ni6.rip6_plen = ifa->ifa_plen; 1910 applyplen(&ni6.rip6_dest, ni6.rip6_plen); 1911 trace(1, "\tfind interface route %s/%d on %d\n", 1912 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index); 1913 if ((rrt = rtsearch(&ni6, NULL)) != NULL) { 1914 struct in6_addr none; 1915 memset(&none, 0, sizeof(none)); 1916 if (rrt->rrt_index == ifcp->ifc_index && 1917 (IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &none) || 1918 IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw))) { 1919 trace(1, "\troute found, age it\n"); 1920 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1921 rrt->rrt_t = t_lifetime; 1922 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 1923 } 1924 updated++; 1925 } else { 1926 trace(1, "\tnon-interface route found: %s/%d on %d\n", 1927 inet6_n2p(&rrt->rrt_info.rip6_dest), 1928 rrt->rrt_info.rip6_plen, 1929 rrt->rrt_index); 1930 } 1931 } else 1932 trace(1, "\tno interface route found\n"); 1933 /* age route for p2p destination */ 1934 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1935 memset(&ni6, 0, sizeof(ni6)); 1936 ni6.rip6_dest = ifa->ifa_raddr; 1937 ni6.rip6_plen = 128; 1938 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 1939 trace(1, "\tfind p2p route %s/%d on %d\n", 1940 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, 1941 ifcp->ifc_index); 1942 if ((rrt = rtsearch(&ni6, NULL)) != NULL) { 1943 if (rrt->rrt_index == ifcp->ifc_index && 1944 IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &ifa->ifa_addr)) { 1945 trace(1, "\troute found, age it\n"); 1946 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1947 rrt->rrt_t = t_lifetime; 1948 rrt->rrt_info.rip6_metric = 1949 HOPCNT_INFINITY6; 1950 updated++; 1951 } 1952 } else { 1953 trace(1, "\tnon-p2p route found: %s/%d on %d\n", 1954 inet6_n2p(&rrt->rrt_info.rip6_dest), 1955 rrt->rrt_info.rip6_plen, 1956 rrt->rrt_index); 1957 } 1958 } else 1959 trace(1, "\tno p2p route found\n"); 1960 } 1961 return updated ? 0 : -1; 1962 } 1963 1964 /* 1965 * Get each interface address and put those interface routes to the route 1966 * list. 1967 */ 1968 int 1969 ifrt(ifcp, again) 1970 struct ifc *ifcp; 1971 int again; 1972 { 1973 struct ifac *ifa; 1974 struct riprt *rrt = NULL, *search_rrt, *prev_rrt, *loop_rrt; 1975 struct netinfo6 *np; 1976 time_t t_lifetime; 1977 int need_trigger = 0; 1978 1979 #if 0 1980 if (ifcp->ifc_flags & IFF_LOOPBACK) 1981 return 0; /* ignore loopback */ 1982 #endif 1983 1984 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1985 ifrt_p2p(ifcp, again); 1986 return 0; 1987 } 1988 1989 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 1990 if (IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) { 1991 #if 0 1992 trace(1, "route: %s on %s: " 1993 "skip linklocal interface address\n", 1994 inet6_n2p(&ifa->ifa_addr), ifcp->ifc_name); 1995 #endif 1996 continue; 1997 } 1998 if (IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_addr)) { 1999 #if 0 2000 trace(1, "route: %s: skip unspec interface address\n", 2001 ifcp->ifc_name); 2002 #endif 2003 continue; 2004 } 2005 if (IN6_IS_ADDR_LOOPBACK(&ifa->ifa_addr)) { 2006 #if 0 2007 trace(1, "route: %s: skip loopback address\n", 2008 ifcp->ifc_name); 2009 #endif 2010 continue; 2011 } 2012 if (ifcp->ifc_flags & IFF_UP) { 2013 if ((rrt = MALLOC(struct riprt)) == NULL) 2014 fatal("malloc: struct riprt"); 2015 memset(rrt, 0, sizeof(*rrt)); 2016 rrt->rrt_same = NULL; 2017 rrt->rrt_index = ifcp->ifc_index; 2018 rrt->rrt_t = 0; /* don't age */ 2019 rrt->rrt_info.rip6_dest = ifa->ifa_addr; 2020 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 2021 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; 2022 rrt->rrt_info.rip6_plen = ifa->ifa_plen; 2023 if (ifa->ifa_plen == 128) 2024 rrt->rrt_flags = RTF_HOST; 2025 else 2026 rrt->rrt_flags = RTF_CLONING; 2027 rrt->rrt_rflags |= RRTF_CHANGED; 2028 applyplen(&rrt->rrt_info.rip6_dest, ifa->ifa_plen); 2029 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2030 rrt->rrt_gw = ifa->ifa_addr; 2031 np = &rrt->rrt_info; 2032 search_rrt = rtsearch(np, &prev_rrt); 2033 if (search_rrt != NULL) { 2034 if (search_rrt->rrt_info.rip6_metric <= 2035 rrt->rrt_info.rip6_metric) { 2036 /* Already have better route */ 2037 if (!again) { 2038 trace(1, "route: %s/%d: " 2039 "already registered (%s)\n", 2040 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2041 ifcp->ifc_name); 2042 } 2043 goto next; 2044 } 2045 2046 if (prev_rrt) 2047 prev_rrt->rrt_next = rrt->rrt_next; 2048 else 2049 riprt = rrt->rrt_next; 2050 delroute(&rrt->rrt_info, &rrt->rrt_gw); 2051 } 2052 /* Attach the route to the list */ 2053 trace(1, "route: %s/%d: register route (%s)\n", 2054 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2055 ifcp->ifc_name); 2056 rrt->rrt_next = riprt; 2057 riprt = rrt; 2058 addroute(rrt, &rrt->rrt_gw, ifcp); 2059 rrt = NULL; 2060 sendrequest(ifcp); 2061 ripsend(ifcp, &ifcp->ifc_ripsin, 0); 2062 need_trigger = 1; 2063 } else { 2064 for (loop_rrt = riprt; loop_rrt; loop_rrt = loop_rrt->rrt_next) { 2065 if (loop_rrt->rrt_index == ifcp->ifc_index) { 2066 t_lifetime = time(NULL) - RIP_LIFETIME; 2067 if (loop_rrt->rrt_t == 0 || loop_rrt->rrt_t > t_lifetime) { 2068 loop_rrt->rrt_t = t_lifetime; 2069 loop_rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 2070 loop_rrt->rrt_rflags |= RRTF_CHANGED; 2071 need_trigger = 1; 2072 } 2073 } 2074 } 2075 } 2076 next: 2077 if (rrt) 2078 free(rrt); 2079 } 2080 return need_trigger; 2081 } 2082 2083 /* 2084 * there are couple of p2p interface routing models. "behavior" lets 2085 * you pick one. it looks that gated behavior fits best with BSDs, 2086 * since BSD kernels do not look at prefix length on p2p interfaces. 2087 */ 2088 void 2089 ifrt_p2p(ifcp, again) 2090 struct ifc *ifcp; 2091 int again; 2092 { 2093 struct ifac *ifa; 2094 struct riprt *rrt, *orrt, *prevrrt; 2095 struct netinfo6 *np; 2096 struct in6_addr addr, dest; 2097 int advert, ignore, i; 2098 #define P2PADVERT_NETWORK 1 2099 #define P2PADVERT_ADDR 2 2100 #define P2PADVERT_DEST 4 2101 #define P2PADVERT_MAX 4 2102 const enum { CISCO, GATED, ROUTE6D } behavior = GATED; 2103 const char *category = ""; 2104 const char *noadv; 2105 2106 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 2107 addr = ifa->ifa_addr; 2108 dest = ifa->ifa_raddr; 2109 applyplen(&addr, ifa->ifa_plen); 2110 applyplen(&dest, ifa->ifa_plen); 2111 advert = ignore = 0; 2112 switch (behavior) { 2113 case CISCO: 2114 /* 2115 * honor addr/plen, just like normal shared medium 2116 * interface. this may cause trouble if you reuse 2117 * addr/plen on other interfaces. 2118 * 2119 * advertise addr/plen. 2120 */ 2121 advert |= P2PADVERT_NETWORK; 2122 break; 2123 case GATED: 2124 /* 2125 * prefixlen on p2p interface is meaningless. 2126 * advertise addr/128 and dest/128. 2127 * 2128 * do not install network route to route6d routing 2129 * table (if we do, it would prevent route installation 2130 * for other p2p interface that shares addr/plen). 2131 * 2132 * XXX what should we do if dest is ::? it will not 2133 * get announced anyways (see following filter), 2134 * but we need to think. 2135 */ 2136 advert |= P2PADVERT_ADDR; 2137 advert |= P2PADVERT_DEST; 2138 ignore |= P2PADVERT_NETWORK; 2139 break; 2140 case ROUTE6D: 2141 /* 2142 * just for testing. actually the code is redundant 2143 * given the current p2p interface address assignment 2144 * rule for kame kernel. 2145 * 2146 * intent: 2147 * A/n -> announce A/n 2148 * A B/n, A and B share prefix -> A/n (= B/n) 2149 * A B/n, do not share prefix -> A/128 and B/128 2150 * actually, A/64 and A B/128 are the only cases 2151 * permitted by the kernel: 2152 * A/64 -> A/64 2153 * A B/128 -> A/128 and B/128 2154 */ 2155 if (!IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_raddr)) { 2156 if (IN6_ARE_ADDR_EQUAL(&addr, &dest)) 2157 advert |= P2PADVERT_NETWORK; 2158 else { 2159 advert |= P2PADVERT_ADDR; 2160 advert |= P2PADVERT_DEST; 2161 ignore |= P2PADVERT_NETWORK; 2162 } 2163 } else 2164 advert |= P2PADVERT_NETWORK; 2165 break; 2166 } 2167 2168 for (i = 1; i <= P2PADVERT_MAX; i *= 2) { 2169 if ((ignore & i) != 0) 2170 continue; 2171 if ((rrt = MALLOC(struct riprt)) == NULL) { 2172 fatal("malloc: struct riprt"); 2173 /*NOTREACHED*/ 2174 } 2175 memset(rrt, 0, sizeof(*rrt)); 2176 rrt->rrt_same = NULL; 2177 rrt->rrt_index = ifcp->ifc_index; 2178 rrt->rrt_t = 0; /* don't age */ 2179 switch (i) { 2180 case P2PADVERT_NETWORK: 2181 rrt->rrt_info.rip6_dest = ifa->ifa_addr; 2182 rrt->rrt_info.rip6_plen = ifa->ifa_plen; 2183 applyplen(&rrt->rrt_info.rip6_dest, 2184 ifa->ifa_plen); 2185 category = "network"; 2186 break; 2187 case P2PADVERT_ADDR: 2188 rrt->rrt_info.rip6_dest = ifa->ifa_addr; 2189 rrt->rrt_info.rip6_plen = 128; 2190 rrt->rrt_gw = in6addr_loopback; 2191 category = "addr"; 2192 break; 2193 case P2PADVERT_DEST: 2194 rrt->rrt_info.rip6_dest = ifa->ifa_raddr; 2195 rrt->rrt_info.rip6_plen = 128; 2196 rrt->rrt_gw = ifa->ifa_addr; 2197 category = "dest"; 2198 break; 2199 } 2200 if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest) || 2201 IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)) { 2202 #if 0 2203 trace(1, "route: %s: skip unspec/linklocal " 2204 "(%s on %s)\n", category, ifcp->ifc_name); 2205 #endif 2206 free(rrt); 2207 continue; 2208 } 2209 if ((advert & i) == 0) { 2210 rrt->rrt_rflags |= RRTF_NOADVERTISE; 2211 noadv = ", NO-ADV"; 2212 } else 2213 noadv = ""; 2214 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 2215 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; 2216 np = &rrt->rrt_info; 2217 orrt = rtsearch(np, &prevrrt); 2218 if (!orrt) { 2219 /* Attach the route to the list */ 2220 trace(1, "route: %s/%d: register route " 2221 "(%s on %s%s)\n", 2222 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2223 category, ifcp->ifc_name, noadv); 2224 rrt->rrt_next = riprt; 2225 riprt = rrt; 2226 } else if (rrt->rrt_index != orrt->rrt_index || 2227 rrt->rrt_info.rip6_metric != orrt->rrt_info.rip6_metric) { 2228 /* swap route */ 2229 rrt->rrt_next = orrt->rrt_next; 2230 if (prevrrt) 2231 prevrrt->rrt_next = rrt; 2232 else 2233 riprt = rrt; 2234 free(orrt); 2235 2236 trace(1, "route: %s/%d: update (%s on %s%s)\n", 2237 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2238 category, ifcp->ifc_name, noadv); 2239 } else { 2240 /* Already found */ 2241 if (!again) { 2242 trace(1, "route: %s/%d: " 2243 "already registered (%s on %s%s)\n", 2244 inet6_n2p(&np->rip6_dest), 2245 np->rip6_plen, category, 2246 ifcp->ifc_name, noadv); 2247 } 2248 free(rrt); 2249 } 2250 } 2251 } 2252 #undef P2PADVERT_NETWORK 2253 #undef P2PADVERT_ADDR 2254 #undef P2PADVERT_DEST 2255 #undef P2PADVERT_MAX 2256 } 2257 2258 int 2259 getifmtu(ifindex) 2260 int ifindex; 2261 { 2262 int mib[6]; 2263 char *buf; 2264 size_t msize; 2265 struct if_msghdr *ifm; 2266 int mtu; 2267 2268 mib[0] = CTL_NET; 2269 mib[1] = PF_ROUTE; 2270 mib[2] = 0; 2271 mib[3] = AF_INET6; 2272 mib[4] = NET_RT_IFLIST; 2273 mib[5] = ifindex; 2274 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) { 2275 fatal("sysctl estimate NET_RT_IFLIST"); 2276 /*NOTREACHED*/ 2277 } 2278 if ((buf = malloc(msize)) == NULL) { 2279 fatal("malloc"); 2280 /*NOTREACHED*/ 2281 } 2282 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) { 2283 fatal("sysctl NET_RT_IFLIST"); 2284 /*NOTREACHED*/ 2285 } 2286 ifm = (struct if_msghdr *)buf; 2287 mtu = ifm->ifm_data.ifi_mtu; 2288 #ifdef __FreeBSD__ 2289 if (ifindex != ifm->ifm_index) { 2290 fatal("ifindex does not match with ifm_index"); 2291 /*NOTREACHED*/ 2292 } 2293 #endif 2294 free(buf); 2295 return mtu; 2296 } 2297 2298 const char * 2299 rttypes(rtm) 2300 struct rt_msghdr *rtm; 2301 { 2302 #define RTTYPE(s, f) \ 2303 do { \ 2304 if (rtm->rtm_type == (f)) \ 2305 return (s); \ 2306 } while (0) 2307 RTTYPE("ADD", RTM_ADD); 2308 RTTYPE("DELETE", RTM_DELETE); 2309 RTTYPE("CHANGE", RTM_CHANGE); 2310 RTTYPE("GET", RTM_GET); 2311 RTTYPE("LOSING", RTM_LOSING); 2312 RTTYPE("REDIRECT", RTM_REDIRECT); 2313 RTTYPE("MISS", RTM_MISS); 2314 RTTYPE("LOCK", RTM_LOCK); 2315 RTTYPE("OLDADD", RTM_OLDADD); 2316 RTTYPE("OLDDEL", RTM_OLDDEL); 2317 RTTYPE("RESOLVE", RTM_RESOLVE); 2318 RTTYPE("NEWADDR", RTM_NEWADDR); 2319 RTTYPE("DELADDR", RTM_DELADDR); 2320 RTTYPE("IFINFO", RTM_IFINFO); 2321 #ifdef RTM_OLDADD 2322 RTTYPE("OLDADD", RTM_OLDADD); 2323 #endif 2324 #ifdef RTM_OLDDEL 2325 RTTYPE("OLDDEL", RTM_OLDDEL); 2326 #endif 2327 #ifdef RTM_OIFINFO 2328 RTTYPE("OIFINFO", RTM_OIFINFO); 2329 #endif 2330 #ifdef RTM_IFANNOUNCE 2331 RTTYPE("IFANNOUNCE", RTM_IFANNOUNCE); 2332 #endif 2333 #ifdef RTM_NEWMADDR 2334 RTTYPE("NEWMADDR", RTM_NEWMADDR); 2335 #endif 2336 #ifdef RTM_DELMADDR 2337 RTTYPE("DELMADDR", RTM_DELMADDR); 2338 #endif 2339 #undef RTTYPE 2340 return NULL; 2341 } 2342 2343 const char * 2344 rtflags(rtm) 2345 struct rt_msghdr *rtm; 2346 { 2347 static char buf[BUFSIZ]; 2348 2349 /* 2350 * letter conflict should be okay. painful when *BSD diverges... 2351 */ 2352 strlcpy(buf, "", sizeof(buf)); 2353 #define RTFLAG(s, f) \ 2354 do { \ 2355 if (rtm->rtm_flags & (f)) \ 2356 strlcat(buf, (s), sizeof(buf)); \ 2357 } while (0) 2358 RTFLAG("U", RTF_UP); 2359 RTFLAG("G", RTF_GATEWAY); 2360 RTFLAG("H", RTF_HOST); 2361 RTFLAG("R", RTF_REJECT); 2362 RTFLAG("D", RTF_DYNAMIC); 2363 RTFLAG("M", RTF_MODIFIED); 2364 RTFLAG("d", RTF_DONE); 2365 #ifdef RTF_MASK 2366 RTFLAG("m", RTF_MASK); 2367 #endif 2368 RTFLAG("C", RTF_CLONING); 2369 #ifdef RTF_CLONED 2370 RTFLAG("c", RTF_CLONED); 2371 #endif 2372 #ifdef RTF_PRCLONING 2373 RTFLAG("c", RTF_PRCLONING); 2374 #endif 2375 #ifdef RTF_WASCLONED 2376 RTFLAG("W", RTF_WASCLONED); 2377 #endif 2378 RTFLAG("X", RTF_XRESOLVE); 2379 RTFLAG("L", RTF_LLINFO); 2380 RTFLAG("S", RTF_STATIC); 2381 RTFLAG("B", RTF_BLACKHOLE); 2382 #ifdef RTF_PROTO3 2383 RTFLAG("3", RTF_PROTO3); 2384 #endif 2385 RTFLAG("2", RTF_PROTO2); 2386 RTFLAG("1", RTF_PROTO1); 2387 #ifdef RTF_BROADCAST 2388 RTFLAG("b", RTF_BROADCAST); 2389 #endif 2390 #ifdef RTF_DEFAULT 2391 RTFLAG("d", RTF_DEFAULT); 2392 #endif 2393 #ifdef RTF_ISAROUTER 2394 RTFLAG("r", RTF_ISAROUTER); 2395 #endif 2396 #ifdef RTF_TUNNEL 2397 RTFLAG("T", RTF_TUNNEL); 2398 #endif 2399 #ifdef RTF_AUTH 2400 RTFLAG("A", RTF_AUTH); 2401 #endif 2402 #ifdef RTF_CRYPT 2403 RTFLAG("E", RTF_CRYPT); 2404 #endif 2405 #undef RTFLAG 2406 return buf; 2407 } 2408 2409 const char * 2410 ifflags(flags) 2411 int flags; 2412 { 2413 static char buf[BUFSIZ]; 2414 2415 strlcpy(buf, "", sizeof(buf)); 2416 #define IFFLAG(s, f) \ 2417 do { \ 2418 if (flags & (f)) { \ 2419 if (buf[0]) \ 2420 strlcat(buf, ",", sizeof(buf)); \ 2421 strlcat(buf, (s), sizeof(buf)); \ 2422 } \ 2423 } while (0) 2424 IFFLAG("UP", IFF_UP); 2425 IFFLAG("BROADCAST", IFF_BROADCAST); 2426 IFFLAG("DEBUG", IFF_DEBUG); 2427 IFFLAG("LOOPBACK", IFF_LOOPBACK); 2428 IFFLAG("POINTOPOINT", IFF_POINTOPOINT); 2429 #ifdef IFF_NOTRAILERS 2430 IFFLAG("NOTRAILERS", IFF_NOTRAILERS); 2431 #endif 2432 #ifdef IFF_SMART 2433 IFFLAG("SMART", IFF_SMART); 2434 #endif 2435 IFFLAG("RUNNING", IFF_RUNNING); 2436 IFFLAG("NOARP", IFF_NOARP); 2437 IFFLAG("PROMISC", IFF_PROMISC); 2438 IFFLAG("ALLMULTI", IFF_ALLMULTI); 2439 IFFLAG("OACTIVE", IFF_OACTIVE); 2440 IFFLAG("SIMPLEX", IFF_SIMPLEX); 2441 IFFLAG("LINK0", IFF_LINK0); 2442 IFFLAG("LINK1", IFF_LINK1); 2443 IFFLAG("LINK2", IFF_LINK2); 2444 IFFLAG("MULTICAST", IFF_MULTICAST); 2445 #undef IFFLAG 2446 return buf; 2447 } 2448 2449 void 2450 krtread(again) 2451 int again; 2452 { 2453 int mib[6]; 2454 size_t msize; 2455 char *buf, *p, *lim; 2456 struct rt_msghdr *rtm; 2457 int retry; 2458 const char *errmsg; 2459 2460 retry = 0; 2461 buf = NULL; 2462 mib[0] = CTL_NET; 2463 mib[1] = PF_ROUTE; 2464 mib[2] = 0; 2465 mib[3] = AF_INET6; /* Address family */ 2466 mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */ 2467 mib[5] = 0; /* No flags */ 2468 do { 2469 retry++; 2470 errmsg = NULL; 2471 if (buf) 2472 free(buf); 2473 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) { 2474 errmsg = "sysctl estimate"; 2475 continue; 2476 } 2477 if ((buf = malloc(msize)) == NULL) { 2478 errmsg = "malloc"; 2479 continue; 2480 } 2481 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) { 2482 errmsg = "sysctl NET_RT_DUMP"; 2483 continue; 2484 } 2485 } while (retry < 5 && errmsg != NULL); 2486 if (errmsg) { 2487 fatal("%s (with %d retries, msize=%lu)", errmsg, retry, 2488 (u_long)msize); 2489 /*NOTREACHED*/ 2490 } else if (1 < retry) 2491 syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry); 2492 2493 lim = buf + msize; 2494 for (p = buf; p < lim; p += rtm->rtm_msglen) { 2495 rtm = (struct rt_msghdr *)p; 2496 rt_entry(rtm, again); 2497 } 2498 free(buf); 2499 } 2500 2501 void 2502 rt_entry(rtm, again) 2503 struct rt_msghdr *rtm; 2504 int again; 2505 { 2506 struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask; 2507 struct sockaddr_in6 *sin6_genmask, *sin6_ifp; 2508 char *rtmp, *ifname = NULL; 2509 struct riprt *rrt, *orrt; 2510 struct netinfo6 *np; 2511 int s; 2512 2513 sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = 0; 2514 if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags & 2515 (RTF_CLONING|RTF_XRESOLVE|RTF_LLINFO|RTF_BLACKHOLE)) { 2516 return; /* not interested in the link route */ 2517 } 2518 /* do not look at cloned routes */ 2519 #ifdef RTF_WASCLONED 2520 if (rtm->rtm_flags & RTF_WASCLONED) 2521 return; 2522 #endif 2523 #ifdef RTF_CLONED 2524 if (rtm->rtm_flags & RTF_CLONED) 2525 return; 2526 #endif 2527 /* 2528 * do not look at dynamic routes. 2529 * netbsd/openbsd cloned routes have UGHD. 2530 */ 2531 if (rtm->rtm_flags & RTF_DYNAMIC) 2532 return; 2533 rtmp = (char *)(rtm + 1); 2534 /* Destination */ 2535 if ((rtm->rtm_addrs & RTA_DST) == 0) 2536 return; /* ignore routes without destination address */ 2537 sin6_dst = (struct sockaddr_in6 *)rtmp; 2538 rtmp += ROUNDUP(sin6_dst->sin6_len); 2539 if (rtm->rtm_addrs & RTA_GATEWAY) { 2540 sin6_gw = (struct sockaddr_in6 *)rtmp; 2541 rtmp += ROUNDUP(sin6_gw->sin6_len); 2542 } 2543 if (rtm->rtm_addrs & RTA_NETMASK) { 2544 sin6_mask = (struct sockaddr_in6 *)rtmp; 2545 rtmp += ROUNDUP(sin6_mask->sin6_len); 2546 } 2547 if (rtm->rtm_addrs & RTA_GENMASK) { 2548 sin6_genmask = (struct sockaddr_in6 *)rtmp; 2549 rtmp += ROUNDUP(sin6_genmask->sin6_len); 2550 } 2551 if (rtm->rtm_addrs & RTA_IFP) { 2552 sin6_ifp = (struct sockaddr_in6 *)rtmp; 2553 rtmp += ROUNDUP(sin6_ifp->sin6_len); 2554 } 2555 2556 /* Destination */ 2557 if (sin6_dst->sin6_family != AF_INET6) 2558 return; 2559 if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr)) 2560 return; /* Link-local */ 2561 if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback)) 2562 return; /* Loopback */ 2563 if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr)) 2564 return; 2565 2566 if ((rrt = MALLOC(struct riprt)) == NULL) { 2567 fatal("malloc: struct riprt"); 2568 /*NOTREACHED*/ 2569 } 2570 memset(rrt, 0, sizeof(*rrt)); 2571 np = &rrt->rrt_info; 2572 rrt->rrt_same = NULL; 2573 rrt->rrt_t = time(NULL); 2574 if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC)) 2575 rrt->rrt_t = 0; /* Don't age static routes */ 2576 if ((rtm->rtm_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST) 2577 rrt->rrt_t = 0; /* Don't age non-gateway host routes */ 2578 np->rip6_tag = 0; 2579 np->rip6_metric = rtm->rtm_rmx.rmx_hopcount; 2580 if (np->rip6_metric < 1) 2581 np->rip6_metric = 1; 2582 rrt->rrt_flags = rtm->rtm_flags; 2583 np->rip6_dest = sin6_dst->sin6_addr; 2584 2585 /* Mask or plen */ 2586 if (rtm->rtm_flags & RTF_HOST) 2587 np->rip6_plen = 128; /* Host route */ 2588 else if (sin6_mask) 2589 np->rip6_plen = sin6mask2len(sin6_mask); 2590 else 2591 np->rip6_plen = 0; 2592 2593 orrt = rtsearch(np, NULL); 2594 if (orrt && orrt->rrt_info.rip6_metric != HOPCNT_INFINITY6) { 2595 /* Already found */ 2596 if (!again) { 2597 trace(1, "route: %s/%d flags %s: already registered\n", 2598 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2599 rtflags(rtm)); 2600 } 2601 free(rrt); 2602 return; 2603 } 2604 /* Gateway */ 2605 if (!sin6_gw) 2606 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2607 else { 2608 if (sin6_gw->sin6_family == AF_INET6) 2609 rrt->rrt_gw = sin6_gw->sin6_addr; 2610 else if (sin6_gw->sin6_family == AF_LINK) { 2611 /* XXX in case ppp link? */ 2612 rrt->rrt_gw = in6addr_loopback; 2613 } else 2614 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2615 } 2616 trace(1, "route: %s/%d flags %s", 2617 inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm)); 2618 trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw)); 2619 2620 /* Interface */ 2621 s = rtm->rtm_index; 2622 if (s < nindex2ifc && index2ifc[s]) 2623 ifname = index2ifc[s]->ifc_name; 2624 else { 2625 trace(1, " not configured\n"); 2626 free(rrt); 2627 return; 2628 } 2629 trace(1, " if %s sock %d", ifname, s); 2630 rrt->rrt_index = s; 2631 2632 trace(1, "\n"); 2633 2634 /* Check gateway */ 2635 if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) && 2636 !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw) 2637 #ifdef __FreeBSD__ 2638 && (rrt->rrt_flags & RTF_LOCAL) == 0 2639 #endif 2640 ) { 2641 trace(0, "***** Gateway %s is not a link-local address.\n", 2642 inet6_n2p(&rrt->rrt_gw)); 2643 trace(0, "***** dest(%s) if(%s) -- Not optimized.\n", 2644 inet6_n2p(&rrt->rrt_info.rip6_dest), ifname); 2645 rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR; 2646 } 2647 2648 /* Put it to the route list */ 2649 if (orrt && orrt->rrt_info.rip6_metric == HOPCNT_INFINITY6) { 2650 /* replace route list */ 2651 rrt->rrt_next = orrt->rrt_next; 2652 *orrt = *rrt; 2653 trace(1, "route: %s/%d flags %s: replace new route\n", 2654 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2655 rtflags(rtm)); 2656 free(rrt); 2657 } else { 2658 rrt->rrt_next = riprt; 2659 riprt = rrt; 2660 } 2661 } 2662 2663 int 2664 addroute(rrt, gw, ifcp) 2665 struct riprt *rrt; 2666 const struct in6_addr *gw; 2667 struct ifc *ifcp; 2668 { 2669 struct netinfo6 *np; 2670 u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ]; 2671 struct rt_msghdr *rtm; 2672 struct sockaddr_in6 *sin6; 2673 int len; 2674 2675 np = &rrt->rrt_info; 2676 inet_ntop(AF_INET6, (const void *)gw, (char *)buf1, sizeof(buf1)); 2677 inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2)); 2678 tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n", 2679 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 2680 np->rip6_metric - 1, buf2); 2681 if (rtlog) 2682 fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(), 2683 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 2684 np->rip6_metric - 1, buf2); 2685 if (nflag) 2686 return 0; 2687 2688 memset(buf, 0, sizeof(buf)); 2689 rtm = (struct rt_msghdr *)buf; 2690 rtm->rtm_type = RTM_ADD; 2691 rtm->rtm_version = RTM_VERSION; 2692 rtm->rtm_seq = ++seq; 2693 rtm->rtm_pid = pid; 2694 rtm->rtm_flags = rrt->rrt_flags; 2695 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 2696 rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1; 2697 rtm->rtm_inits = RTV_HOPCOUNT; 2698 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2699 /* Destination */ 2700 sin6->sin6_len = sizeof(struct sockaddr_in6); 2701 sin6->sin6_family = AF_INET6; 2702 sin6->sin6_addr = np->rip6_dest; 2703 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 2704 /* Gateway */ 2705 sin6->sin6_len = sizeof(struct sockaddr_in6); 2706 sin6->sin6_family = AF_INET6; 2707 sin6->sin6_addr = *gw; 2708 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 2709 /* Netmask */ 2710 sin6->sin6_len = sizeof(struct sockaddr_in6); 2711 sin6->sin6_family = AF_INET6; 2712 sin6->sin6_addr = *(plen2mask(np->rip6_plen)); 2713 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 2714 2715 len = (char *)sin6 - (char *)buf; 2716 rtm->rtm_msglen = len; 2717 if (write(rtsock, buf, len) > 0) 2718 return 0; 2719 2720 if (errno == EEXIST) { 2721 trace(0, "ADD: Route already exists %s/%d gw %s\n", 2722 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 2723 if (rtlog) 2724 fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n", 2725 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 2726 } else { 2727 trace(0, "Can not write to rtsock (addroute): %s\n", 2728 strerror(errno)); 2729 if (rtlog) 2730 fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2731 strerror(errno)); 2732 } 2733 return -1; 2734 } 2735 2736 int 2737 delroute(np, gw) 2738 struct netinfo6 *np; 2739 struct in6_addr *gw; 2740 { 2741 u_char buf[BUFSIZ], buf2[BUFSIZ]; 2742 struct rt_msghdr *rtm; 2743 struct sockaddr_in6 *sin6; 2744 int len; 2745 2746 inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2)); 2747 tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest), 2748 np->rip6_plen, buf2); 2749 if (rtlog) 2750 fprintf(rtlog, "%s: DEL: %s/%d gw %s\n", 2751 hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2752 if (nflag) 2753 return 0; 2754 2755 memset(buf, 0, sizeof(buf)); 2756 rtm = (struct rt_msghdr *)buf; 2757 rtm->rtm_type = RTM_DELETE; 2758 rtm->rtm_version = RTM_VERSION; 2759 rtm->rtm_seq = ++seq; 2760 rtm->rtm_pid = pid; 2761 rtm->rtm_flags = RTF_UP | RTF_GATEWAY; 2762 if (np->rip6_plen == sizeof(struct in6_addr) * 8) 2763 rtm->rtm_flags |= RTF_HOST; 2764 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 2765 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2766 /* Destination */ 2767 sin6->sin6_len = sizeof(struct sockaddr_in6); 2768 sin6->sin6_family = AF_INET6; 2769 sin6->sin6_addr = np->rip6_dest; 2770 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 2771 /* Gateway */ 2772 sin6->sin6_len = sizeof(struct sockaddr_in6); 2773 sin6->sin6_family = AF_INET6; 2774 sin6->sin6_addr = *gw; 2775 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 2776 /* Netmask */ 2777 sin6->sin6_len = sizeof(struct sockaddr_in6); 2778 sin6->sin6_family = AF_INET6; 2779 sin6->sin6_addr = *(plen2mask(np->rip6_plen)); 2780 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)); 2781 2782 len = (char *)sin6 - (char *)buf; 2783 rtm->rtm_msglen = len; 2784 if (write(rtsock, buf, len) >= 0) 2785 return 0; 2786 2787 if (errno == ESRCH) { 2788 trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n", 2789 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2790 if (rtlog) 2791 fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n", 2792 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2793 } else { 2794 trace(0, "Can not write to rtsock (delroute): %s\n", 2795 strerror(errno)); 2796 if (rtlog) 2797 fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2798 strerror(errno)); 2799 } 2800 return -1; 2801 } 2802 2803 struct in6_addr * 2804 getroute(np, gw) 2805 struct netinfo6 *np; 2806 struct in6_addr *gw; 2807 { 2808 u_char buf[BUFSIZ]; 2809 u_long myseq; 2810 int len; 2811 struct rt_msghdr *rtm; 2812 struct sockaddr_in6 *sin6; 2813 2814 rtm = (struct rt_msghdr *)buf; 2815 len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6); 2816 memset(rtm, 0, len); 2817 rtm->rtm_type = RTM_GET; 2818 rtm->rtm_version = RTM_VERSION; 2819 myseq = ++seq; 2820 rtm->rtm_seq = myseq; 2821 rtm->rtm_addrs = RTA_DST; 2822 rtm->rtm_msglen = len; 2823 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2824 sin6->sin6_len = sizeof(struct sockaddr_in6); 2825 sin6->sin6_family = AF_INET6; 2826 sin6->sin6_addr = np->rip6_dest; 2827 if (write(rtsock, buf, len) < 0) { 2828 if (errno == ESRCH) /* No such route found */ 2829 return NULL; 2830 perror("write to rtsock"); 2831 exit(1); 2832 } 2833 do { 2834 if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 2835 perror("read from rtsock"); 2836 exit(1); 2837 } 2838 rtm = (struct rt_msghdr *)buf; 2839 } while (rtm->rtm_seq != myseq || rtm->rtm_pid != pid); 2840 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2841 if (rtm->rtm_addrs & RTA_DST) { 2842 sin6 = (struct sockaddr_in6 *) 2843 ((char *)sin6 + ROUNDUP(sin6->sin6_len)); 2844 } 2845 if (rtm->rtm_addrs & RTA_GATEWAY) { 2846 *gw = sin6->sin6_addr; 2847 return gw; 2848 } 2849 return NULL; 2850 } 2851 2852 const char * 2853 inet6_n2p(p) 2854 const struct in6_addr *p; 2855 { 2856 static char buf[BUFSIZ]; 2857 2858 return inet_ntop(AF_INET6, (const void *)p, buf, sizeof(buf)); 2859 } 2860 2861 void 2862 ifrtdump(sig) 2863 int sig; 2864 { 2865 2866 ifdump(sig); 2867 rtdump(sig); 2868 } 2869 2870 void 2871 ifdump(sig) 2872 int sig; 2873 { 2874 struct ifc *ifcp; 2875 FILE *dump; 2876 int i; 2877 2878 if (sig == 0) 2879 dump = stderr; 2880 else 2881 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 2882 dump = stderr; 2883 2884 fprintf(dump, "%s: Interface Table Dump\n", hms()); 2885 fprintf(dump, " Number of interfaces: %d\n", nifc); 2886 for (i = 0; i < 2; i++) { 2887 fprintf(dump, " %sadvertising interfaces:\n", i ? "non-" : ""); 2888 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 2889 if (i == 0) { 2890 if ((ifcp->ifc_flags & IFF_UP) == 0) 2891 continue; 2892 if (iff_find(ifcp, 'N') != NULL) 2893 continue; 2894 } else { 2895 if (ifcp->ifc_flags & IFF_UP) 2896 continue; 2897 } 2898 ifdump0(dump, ifcp); 2899 } 2900 } 2901 fprintf(dump, "\n"); 2902 if (dump != stderr) 2903 fclose(dump); 2904 } 2905 2906 void 2907 ifdump0(dump, ifcp) 2908 FILE *dump; 2909 const struct ifc *ifcp; 2910 { 2911 struct ifac *ifa; 2912 struct iff *iffp; 2913 char buf[BUFSIZ]; 2914 const char *ft; 2915 int addr; 2916 2917 fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n", 2918 ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags), 2919 inet6_n2p(&ifcp->ifc_mylladdr), 2920 ifcp->ifc_mtu, ifcp->ifc_metric); 2921 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 2922 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 2923 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, 2924 buf, sizeof(buf)); 2925 fprintf(dump, "\t%s/%d -- %s\n", 2926 inet6_n2p(&ifa->ifa_addr), 2927 ifa->ifa_plen, buf); 2928 } else { 2929 fprintf(dump, "\t%s/%d\n", 2930 inet6_n2p(&ifa->ifa_addr), 2931 ifa->ifa_plen); 2932 } 2933 } 2934 if (ifcp->ifc_filter) { 2935 fprintf(dump, "\tFilter:"); 2936 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 2937 addr = 0; 2938 switch (iffp->iff_type) { 2939 case 'A': 2940 ft = "Aggregate"; addr++; break; 2941 case 'N': 2942 ft = "No-use"; break; 2943 case 'O': 2944 ft = "Advertise-only"; addr++; break; 2945 case 'T': 2946 ft = "Default-only"; break; 2947 case 'L': 2948 ft = "Listen-only"; addr++; break; 2949 default: 2950 snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type); 2951 ft = buf; 2952 addr++; 2953 break; 2954 } 2955 fprintf(dump, " %s", ft); 2956 if (addr) { 2957 fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr), 2958 iffp->iff_plen); 2959 } 2960 } 2961 fprintf(dump, "\n"); 2962 } 2963 } 2964 2965 void 2966 rtdump(sig) 2967 int sig; 2968 { 2969 struct riprt *rrt; 2970 char buf[BUFSIZ]; 2971 FILE *dump; 2972 time_t t, age; 2973 2974 if (sig == 0) 2975 dump = stderr; 2976 else 2977 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 2978 dump = stderr; 2979 2980 t = time(NULL); 2981 fprintf(dump, "\n%s: Routing Table Dump\n", hms()); 2982 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 2983 if (rrt->rrt_t == 0) 2984 age = 0; 2985 else 2986 age = t - rrt->rrt_t; 2987 inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest, 2988 buf, sizeof(buf)); 2989 fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)", 2990 buf, rrt->rrt_info.rip6_plen, rrt->rrt_index, 2991 index2ifc[rrt->rrt_index]->ifc_name, 2992 inet6_n2p(&rrt->rrt_gw), 2993 rrt->rrt_info.rip6_metric, (long)age); 2994 if (rrt->rrt_info.rip6_tag) { 2995 fprintf(dump, " tag(0x%04x)", 2996 ntohs(rrt->rrt_info.rip6_tag) & 0xffff); 2997 } 2998 if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) 2999 fprintf(dump, " NOT-LL"); 3000 if (rrt->rrt_rflags & RRTF_NOADVERTISE) 3001 fprintf(dump, " NO-ADV"); 3002 fprintf(dump, "\n"); 3003 } 3004 fprintf(dump, "\n"); 3005 if (dump != stderr) 3006 fclose(dump); 3007 } 3008 3009 /* 3010 * Parse the -A (and -O) options and put corresponding filter object to the 3011 * specified interface structures. Each of the -A/O option has the following 3012 * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate) 3013 * -O 5f09:c400::/32,ef0,ef1 (only when match) 3014 */ 3015 void 3016 filterconfig() 3017 { 3018 int i; 3019 char *p, *ap, *iflp, *ifname; 3020 struct iff ftmp, *iff_obj; 3021 struct ifc *ifcp; 3022 struct riprt *rrt; 3023 #if 0 3024 struct in6_addr gw; 3025 #endif 3026 3027 for (i = 0; i < nfilter; i++) { 3028 ap = filter[i]; 3029 iflp = NULL; 3030 ifcp = NULL; 3031 if (filtertype[i] == 'N' || filtertype[i] == 'T') { 3032 iflp = ap; 3033 goto ifonly; 3034 } 3035 if ((p = index(ap, ',')) != NULL) { 3036 *p++ = '\0'; 3037 iflp = p; 3038 } 3039 if ((p = index(ap, '/')) == NULL) { 3040 fatal("no prefixlen specified for '%s'", ap); 3041 /*NOTREACHED*/ 3042 } 3043 *p++ = '\0'; 3044 if (inet_pton(AF_INET6, ap, &ftmp.iff_addr) != 1) { 3045 fatal("invalid prefix specified for '%s'", ap); 3046 /*NOTREACHED*/ 3047 } 3048 ftmp.iff_plen = atoi(p); 3049 ftmp.iff_next = NULL; 3050 applyplen(&ftmp.iff_addr, ftmp.iff_plen); 3051 ifonly: 3052 ftmp.iff_type = filtertype[i]; 3053 if (iflp == NULL || *iflp == '\0') { 3054 fatal("no interface specified for '%s'", ap); 3055 /*NOTREACHED*/ 3056 } 3057 /* parse the interface listing portion */ 3058 while (iflp) { 3059 ifname = iflp; 3060 if ((iflp = index(iflp, ',')) != NULL) 3061 *iflp++ = '\0'; 3062 ifcp = ifc_find(ifname); 3063 if (ifcp == NULL) { 3064 fatal("no interface %s exists", ifname); 3065 /*NOTREACHED*/ 3066 } 3067 iff_obj = (struct iff *)malloc(sizeof(struct iff)); 3068 if (iff_obj == NULL) { 3069 fatal("malloc of iff_obj"); 3070 /*NOTREACHED*/ 3071 } 3072 memcpy((void *)iff_obj, (void *)&ftmp, 3073 sizeof(struct iff)); 3074 /* link it to the interface filter */ 3075 iff_obj->iff_next = ifcp->ifc_filter; 3076 ifcp->ifc_filter = iff_obj; 3077 } 3078 3079 /* 3080 * -A: aggregate configuration. 3081 */ 3082 if (filtertype[i] != 'A') 3083 continue; 3084 /* put the aggregate to the kernel routing table */ 3085 rrt = (struct riprt *)malloc(sizeof(struct riprt)); 3086 if (rrt == NULL) { 3087 fatal("malloc: rrt"); 3088 /*NOTREACHED*/ 3089 } 3090 memset(rrt, 0, sizeof(struct riprt)); 3091 rrt->rrt_info.rip6_dest = ftmp.iff_addr; 3092 rrt->rrt_info.rip6_plen = ftmp.iff_plen; 3093 rrt->rrt_info.rip6_metric = 1; 3094 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 3095 rrt->rrt_gw = in6addr_loopback; 3096 rrt->rrt_flags = RTF_UP | RTF_REJECT; 3097 rrt->rrt_rflags = RRTF_AGGREGATE; 3098 rrt->rrt_t = 0; 3099 rrt->rrt_index = loopifcp->ifc_index; 3100 #if 0 3101 if (getroute(&rrt->rrt_info, &gw)) { 3102 #if 0 3103 /* 3104 * When the address has already been registered in the 3105 * kernel routing table, it should be removed 3106 */ 3107 delroute(&rrt->rrt_info, &gw); 3108 #else 3109 /* it is safer behavior */ 3110 errno = EINVAL; 3111 fatal("%s/%u already in routing table, " 3112 "cannot aggregate", 3113 inet6_n2p(&rrt->rrt_info.rip6_dest), 3114 rrt->rrt_info.rip6_plen); 3115 /*NOTREACHED*/ 3116 #endif 3117 } 3118 #endif 3119 /* Put the route to the list */ 3120 rrt->rrt_next = riprt; 3121 riprt = rrt; 3122 trace(1, "Aggregate: %s/%d for %s\n", 3123 inet6_n2p(&ftmp.iff_addr), ftmp.iff_plen, 3124 ifcp->ifc_name); 3125 /* Add this route to the kernel */ 3126 if (nflag) /* do not modify kernel routing table */ 3127 continue; 3128 addroute(rrt, &in6addr_loopback, loopifcp); 3129 } 3130 } 3131 3132 /***************** utility functions *****************/ 3133 3134 /* 3135 * Returns a pointer to ifac whose address and prefix length matches 3136 * with the address and prefix length specified in the arguments. 3137 */ 3138 struct ifac * 3139 ifa_match(ifcp, ia, plen) 3140 const struct ifc *ifcp; 3141 const struct in6_addr *ia; 3142 int plen; 3143 { 3144 struct ifac *ifa; 3145 3146 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 3147 if (IN6_ARE_ADDR_EQUAL(&ifa->ifa_addr, ia) && 3148 ifa->ifa_plen == plen) 3149 break; 3150 } 3151 return ifa; 3152 } 3153 3154 /* 3155 * Return a pointer to riprt structure whose address and prefix length 3156 * matches with the address and prefix length found in the argument. 3157 * Note: This is not a rtalloc(). Therefore exact match is necessary. 3158 */ 3159 struct riprt * 3160 rtsearch(np, prev_rrt) 3161 struct netinfo6 *np; 3162 struct riprt **prev_rrt; 3163 { 3164 struct riprt *rrt; 3165 3166 if (prev_rrt) 3167 *prev_rrt = NULL; 3168 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 3169 if (rrt->rrt_info.rip6_plen == np->rip6_plen && 3170 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 3171 &np->rip6_dest)) 3172 return rrt; 3173 if (prev_rrt) 3174 *prev_rrt = rrt; 3175 } 3176 if (prev_rrt) 3177 *prev_rrt = NULL; 3178 return 0; 3179 } 3180 3181 int 3182 sin6mask2len(sin6) 3183 const struct sockaddr_in6 *sin6; 3184 { 3185 3186 return mask2len(&sin6->sin6_addr, 3187 sin6->sin6_len - offsetof(struct sockaddr_in6, sin6_addr)); 3188 } 3189 3190 int 3191 mask2len(addr, lenlim) 3192 const struct in6_addr *addr; 3193 int lenlim; 3194 { 3195 int i = 0, j; 3196 const u_char *p = (const u_char *)addr; 3197 3198 for (j = 0; j < lenlim; j++, p++) { 3199 if (*p != 0xff) 3200 break; 3201 i += 8; 3202 } 3203 if (j < lenlim) { 3204 switch (*p) { 3205 #define MASKLEN(m, l) case m: do { i += l; break; } while (0) 3206 MASKLEN(0xfe, 7); break; 3207 MASKLEN(0xfc, 6); break; 3208 MASKLEN(0xf8, 5); break; 3209 MASKLEN(0xf0, 4); break; 3210 MASKLEN(0xe0, 3); break; 3211 MASKLEN(0xc0, 2); break; 3212 MASKLEN(0x80, 1); break; 3213 #undef MASKLEN 3214 } 3215 } 3216 return i; 3217 } 3218 3219 void 3220 applymask(addr, mask) 3221 struct in6_addr *addr, *mask; 3222 { 3223 int i; 3224 u_long *p, *q; 3225 3226 p = (u_long *)addr; q = (u_long *)mask; 3227 for (i = 0; i < 4; i++) 3228 *p++ &= *q++; 3229 } 3230 3231 static const u_char plent[8] = { 3232 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe 3233 }; 3234 3235 void 3236 applyplen(ia, plen) 3237 struct in6_addr *ia; 3238 int plen; 3239 { 3240 u_char *p; 3241 int i; 3242 3243 p = ia->s6_addr; 3244 for (i = 0; i < 16; i++) { 3245 if (plen <= 0) 3246 *p = 0; 3247 else if (plen < 8) 3248 *p &= plent[plen]; 3249 p++, plen -= 8; 3250 } 3251 } 3252 3253 static const int pl2m[9] = { 3254 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff 3255 }; 3256 3257 struct in6_addr * 3258 plen2mask(n) 3259 int n; 3260 { 3261 static struct in6_addr ia; 3262 u_char *p; 3263 int i; 3264 3265 memset(&ia, 0, sizeof(struct in6_addr)); 3266 p = (u_char *)&ia; 3267 for (i = 0; i < 16; i++, p++, n -= 8) { 3268 if (n >= 8) { 3269 *p = 0xff; 3270 continue; 3271 } 3272 *p = pl2m[n]; 3273 break; 3274 } 3275 return &ia; 3276 } 3277 3278 char * 3279 allocopy(p) 3280 char *p; 3281 { 3282 char *q = (char *)malloc(strlen(p) + 1); 3283 3284 if (!q) { 3285 fatal("malloc"); 3286 /*NOTREACHED*/ 3287 } 3288 3289 strcpy(q, p); 3290 return q; 3291 } 3292 3293 char * 3294 hms() 3295 { 3296 static char buf[BUFSIZ]; 3297 time_t t; 3298 struct tm *tm; 3299 3300 t = time(NULL); 3301 if ((tm = localtime(&t)) == 0) { 3302 fatal("localtime"); 3303 /*NOTREACHED*/ 3304 } 3305 snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, 3306 tm->tm_sec); 3307 return buf; 3308 } 3309 3310 #define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */ 3311 3312 int 3313 ripinterval(timer) 3314 int timer; 3315 { 3316 double r = rand(); 3317 3318 interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5)); 3319 nextalarm = time(NULL) + interval; 3320 return interval; 3321 } 3322 3323 time_t 3324 ripsuptrig() 3325 { 3326 time_t t; 3327 3328 double r = rand(); 3329 t = (int)(RIP_TRIG_INT6_MIN + 3330 (RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX)); 3331 sup_trig_update = time(NULL) + t; 3332 return t; 3333 } 3334 3335 void 3336 #ifdef __STDC__ 3337 fatal(const char *fmt, ...) 3338 #else 3339 fatal(fmt, va_alist) 3340 char *fmt; 3341 va_dcl 3342 #endif 3343 { 3344 va_list ap; 3345 char buf[1024]; 3346 3347 #ifdef __STDC__ 3348 va_start(ap, fmt); 3349 #else 3350 va_start(ap); 3351 #endif 3352 vsnprintf(buf, sizeof(buf), fmt, ap); 3353 va_end(ap); 3354 perror(buf); 3355 syslog(LOG_ERR, "%s: %s", buf, strerror(errno)); 3356 rtdexit(); 3357 } 3358 3359 void 3360 #ifdef __STDC__ 3361 tracet(int level, const char *fmt, ...) 3362 #else 3363 tracet(level, fmt, va_alist) 3364 int level; 3365 char *fmt; 3366 va_dcl 3367 #endif 3368 { 3369 va_list ap; 3370 3371 if (level <= dflag) { 3372 #ifdef __STDC__ 3373 va_start(ap, fmt); 3374 #else 3375 va_start(ap); 3376 #endif 3377 fprintf(stderr, "%s: ", hms()); 3378 vfprintf(stderr, fmt, ap); 3379 va_end(ap); 3380 } 3381 if (dflag) { 3382 #ifdef __STDC__ 3383 va_start(ap, fmt); 3384 #else 3385 va_start(ap); 3386 #endif 3387 if (level > 0) 3388 vsyslog(LOG_DEBUG, fmt, ap); 3389 else 3390 vsyslog(LOG_WARNING, fmt, ap); 3391 va_end(ap); 3392 } 3393 } 3394 3395 void 3396 #ifdef __STDC__ 3397 trace(int level, const char *fmt, ...) 3398 #else 3399 trace(level, fmt, va_alist) 3400 int level; 3401 char *fmt; 3402 va_dcl 3403 #endif 3404 { 3405 va_list ap; 3406 3407 if (level <= dflag) { 3408 #ifdef __STDC__ 3409 va_start(ap, fmt); 3410 #else 3411 va_start(ap); 3412 #endif 3413 vfprintf(stderr, fmt, ap); 3414 va_end(ap); 3415 } 3416 if (dflag) { 3417 #ifdef __STDC__ 3418 va_start(ap, fmt); 3419 #else 3420 va_start(ap); 3421 #endif 3422 if (level > 0) 3423 vsyslog(LOG_DEBUG, fmt, ap); 3424 else 3425 vsyslog(LOG_WARNING, fmt, ap); 3426 va_end(ap); 3427 } 3428 } 3429 3430 unsigned int 3431 if_maxindex() 3432 { 3433 struct if_nameindex *p, *p0; 3434 unsigned int max = 0; 3435 3436 p0 = if_nameindex(); 3437 for (p = p0; p && p->if_index && p->if_name; p++) { 3438 if (max < p->if_index) 3439 max = p->if_index; 3440 } 3441 if_freenameindex(p0); 3442 return max; 3443 } 3444 3445 struct ifc * 3446 ifc_find(name) 3447 char *name; 3448 { 3449 struct ifc *ifcp; 3450 3451 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 3452 if (strcmp(name, ifcp->ifc_name) == 0) 3453 return ifcp; 3454 } 3455 return (struct ifc *)NULL; 3456 } 3457 3458 struct iff * 3459 iff_find(ifcp, type) 3460 struct ifc *ifcp; 3461 int type; 3462 { 3463 struct iff *iffp; 3464 3465 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 3466 if (iffp->iff_type == type) 3467 return iffp; 3468 } 3469 return NULL; 3470 } 3471 3472 void 3473 setindex2ifc(idx, ifcp) 3474 int idx; 3475 struct ifc *ifcp; 3476 { 3477 int n; 3478 struct ifc **p; 3479 3480 if (!index2ifc) { 3481 nindex2ifc = 5; /*initial guess*/ 3482 index2ifc = (struct ifc **) 3483 malloc(sizeof(*index2ifc) * nindex2ifc); 3484 if (index2ifc == NULL) { 3485 fatal("malloc"); 3486 /*NOTREACHED*/ 3487 } 3488 memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc); 3489 } 3490 n = nindex2ifc; 3491 while (nindex2ifc <= idx) 3492 nindex2ifc *= 2; 3493 if (n != nindex2ifc) { 3494 p = (struct ifc **)realloc(index2ifc, 3495 sizeof(*index2ifc) * nindex2ifc); 3496 if (p == NULL) { 3497 fatal("realloc"); 3498 /*NOTREACHED*/ 3499 } 3500 memset(p + n, 0, sizeof(*index2ifc) * (nindex2ifc - n)); 3501 index2ifc = p; 3502 } 3503 index2ifc[idx] = ifcp; 3504 } 3505
Indexes created Wed Oct 22 06:10:02 GMT 2025