route6d.c revision 1.15
1 /* $NetBSD: route6d.c,v 1.15 2000/07/15 04:55:41 itojun Exp $ */ 2 /* $KAME: route6d.c,v 1.32 2000/07/15 04:50:43 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 1.15 2000/07/15 04:55:41 itojun 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 #ifdef HAVE_GETIFADDRS 77 #include <ifaddrs.h> 78 #endif 79 80 #include <arpa/inet.h> 81 82 #include "route6d.h" 83 84 #define MAXFILTER 40 85 86 #ifdef DEBUG 87 #define INIT_INTERVAL6 6 88 #else 89 #define INIT_INTERVAL6 10 /* Wait to submit a initial riprequest */ 90 #endif 91 92 /* alignment constraint for routing socket */ 93 #define ROUNDUP(a) \ 94 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 95 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 96 97 /* 98 * Following two macros are highly depending on KAME Release 99 */ 100 #define IN6_LINKLOCAL_IFINDEX(addr) \ 101 ((addr).s6_addr[2] << 8 | (addr).s6_addr[3]) 102 103 #define SET_IN6_LINKLOCAL_IFINDEX(addr, index) \ 104 do { \ 105 (addr).s6_addr[2] = ((index) >> 8) & 0xff; \ 106 (addr).s6_addr[3] = (index) & 0xff; \ 107 } while (0) 108 109 struct ifc { /* Configuration of an interface */ 110 char *ifc_name; /* if name */ 111 struct ifc *ifc_next; 112 int ifc_index; /* if index */ 113 int ifc_mtu; /* if mtu */ 114 int ifc_metric; /* if metric */ 115 short ifc_flags; /* flags */ 116 struct in6_addr ifc_mylladdr; /* my link-local address */ 117 struct sockaddr_in6 ifc_ripsin; /* rip multicast address */ 118 struct iff *ifc_filter; /* filter structure */ 119 struct ifac *ifc_addr; /* list of AF_INET6 addresses */ 120 int ifc_joined; /* joined to ff02::9 */ 121 }; 122 123 struct ifac { /* Adddress associated to an interface */ 124 struct ifc *ifa_conf; /* back pointer */ 125 struct ifac *ifa_next; 126 struct in6_addr ifa_addr; /* address */ 127 struct in6_addr ifa_raddr; /* remote address, valid in p2p */ 128 int ifa_plen; /* prefix length */ 129 }; 130 131 struct iff { 132 int iff_type; 133 struct in6_addr iff_addr; 134 int iff_plen; 135 struct iff *iff_next; 136 }; 137 138 struct ifc *ifc; 139 int nifc; /* number of valid ifc's */ 140 struct ifc **index2ifc; 141 int nindex2ifc; 142 struct ifc *loopifcp = NULL; /* pointing to loopback */ 143 int loopifindex = 0; /* ditto */ 144 fd_set sockvec; /* vector to select() for receiving */ 145 int rtsock; /* the routing socket */ 146 int ripsock; /* socket to send/receive RIP datagram */ 147 148 struct rip6 *ripbuf; /* packet buffer for sending */ 149 150 /* 151 * Maintain the routes in a linked list. When the number of the routes 152 * grows, somebody would like to introduce a hash based or a radix tree 153 * based strucutre. I believe the number of routes handled by RIP is 154 * limited and I don't have to manage a complex data structure, however. 155 * 156 * One of the major drawbacks of the linear linked list is the difficulty 157 * of representing the relationship between a couple of routes. This may 158 * be a significant problem when we have to support route aggregation with 159 * supressing the specifices covered by the aggregate. 160 */ 161 162 struct riprt { 163 struct riprt *rrt_next; /* next destination */ 164 struct riprt *rrt_same; /* same destination - future use */ 165 struct netinfo6 rrt_info; /* network info */ 166 struct in6_addr rrt_gw; /* gateway */ 167 u_long rrt_flags; /* kernel routing table flags */ 168 u_long rrt_rflags; /* route6d routing table flags */ 169 time_t rrt_t; /* when the route validated */ 170 int rrt_index; /* ifindex from which this route got */ 171 }; 172 173 struct riprt *riprt = 0; 174 175 int dflag = 0; /* debug flag */ 176 int qflag = 0; /* quiet flag */ 177 int nflag = 0; /* don't update kernel routing table */ 178 int aflag = 0; /* age out even the statically defined routes */ 179 int hflag = 0; /* don't split horizon */ 180 int lflag = 0; /* exchange site local routes */ 181 int sflag = 0; /* announce static routes w/ split horizon */ 182 int Sflag = 0; /* announce static routes to every interface */ 183 unsigned long routetag = 0; /* route tag attached on originating case */ 184 185 char *filter[MAXFILTER]; 186 int filtertype[MAXFILTER]; 187 int nfilter = 0; 188 189 pid_t pid; 190 191 struct sockaddr_storage ripsin; 192 193 struct rtentry rtentry; 194 195 int interval = 1; 196 time_t nextalarm = 0; 197 time_t sup_trig_update = 0; 198 199 FILE *rtlog = NULL; 200 201 int logopened = 0; 202 203 static u_long seq = 0; 204 205 #define RRTF_AGGREGATE 0x08000000 206 #define RRTF_NOADVERTISE 0x10000000 207 #define RRTF_NH_NOT_LLADDR 0x20000000 208 #define RRTF_SENDANYWAY 0x40000000 209 #define RRTF_CHANGED 0x80000000 210 211 int main __P((int, char **)); 212 void ripalarm __P((int)); 213 void riprecv __P((void)); 214 void ripsend __P((struct ifc *, struct sockaddr_in6 *, int)); 215 void init __P((void)); 216 void sockopt __P((struct ifc *)); 217 void ifconfig __P((void)); 218 void ifconfig1 __P((const char *, const struct sockaddr *, struct ifc *, int)); 219 void rtrecv __P((void)); 220 int rt_del __P((const struct sockaddr_in6 *, const struct sockaddr_in6 *, 221 const struct sockaddr_in6 *)); 222 int rt_deladdr __P((struct ifc *, const struct sockaddr_in6 *, 223 const struct sockaddr_in6 *)); 224 void filterconfig __P((void)); 225 int getifmtu __P((int)); 226 const char *rttypes __P((struct rt_msghdr *rtm)); 227 const char *rtflags __P((struct rt_msghdr *rtm)); 228 const char *ifflags __P((int flags)); 229 void ifrt __P((struct ifc *, int)); 230 void ifrt_p2p __P((struct ifc *, int)); 231 void applymask __P((struct in6_addr *, struct in6_addr *)); 232 void applyplen __P((struct in6_addr *, int)); 233 void ifrtdump __P((int)); 234 void ifdump __P((int)); 235 void ifdump0 __P((FILE *, const struct ifc *)); 236 void rtdump __P((int)); 237 void rt_entry __P((struct rt_msghdr *, int)); 238 void rtdexit __P((int)); 239 void riprequest __P((struct ifc *, struct netinfo6 *, int, struct sockaddr_in6 *)); 240 void ripflush __P((struct ifc *, struct sockaddr_in6 *)); 241 void sendrequest __P((struct ifc *)); 242 int mask2len __P((const struct in6_addr *, int)); 243 int sendpacket __P((struct sockaddr_in6 *, int)); 244 int addroute __P((struct riprt *, const struct in6_addr *, struct ifc *)); 245 int delroute __P((struct netinfo6 *, struct in6_addr *)); 246 struct in6_addr *getroute __P((struct netinfo6 *, struct in6_addr *)); 247 void krtread __P((int)); 248 int tobeadv __P((struct riprt *, struct ifc *)); 249 char *allocopy __P((char *)); 250 char *hms __P((void)); 251 const char *inet6_n2p __P((const struct in6_addr *)); 252 struct ifac *ifa_match __P((const struct ifc *, const struct in6_addr *, int)); 253 struct in6_addr *plen2mask __P((int)); 254 struct riprt *rtsearch __P((struct netinfo6 *)); 255 int ripinterval __P((int)); 256 time_t ripsuptrig __P((void)); 257 void fatal __P((const char *, ...)); 258 void trace __P((int, const char *, ...)); 259 void tracet __P((int, const char *, ...)); 260 unsigned int if_maxindex __P((void)); 261 struct ifc *ifc_find __P((char *)); 262 struct iff *iff_find __P((struct ifc *, int)); 263 void setindex2ifc __P((int, struct ifc *)); 264 265 #define MALLOC(type) ((type *)malloc(sizeof(type))) 266 267 int 268 main(argc, argv) 269 int argc; 270 char **argv; 271 { 272 int ch; 273 int error = 0; 274 struct ifc *ifcp; 275 sigset_t mask, omask; 276 FILE *pidfile; 277 char *progname; 278 char *ep; 279 280 progname = strrchr(*argv, '/'); 281 if (progname) 282 progname++; 283 else 284 progname = *argv; 285 286 pid = getpid(); 287 while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnqsS")) != EOF) { 288 switch (ch) { 289 case 'A': 290 case 'N': 291 case 'O': 292 case 'T': 293 case 'L': 294 if (nfilter >= MAXFILTER) { 295 fatal("Exceeds MAXFILTER"); 296 /*NOTREACHED*/ 297 } 298 filtertype[nfilter] = ch; 299 filter[nfilter++] = allocopy(optarg); 300 break; 301 case 't': 302 ep = NULL; 303 routetag = strtoul(optarg, &ep, 0); 304 if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) { 305 fatal("invalid route tag"); 306 /*NOTREACHED*/ 307 } 308 break; 309 case 'R': 310 if ((rtlog = fopen(optarg, "w")) == NULL) { 311 fatal("Can not write to routelog"); 312 /*NOTREACHED*/ 313 } 314 break; 315 #define FLAG(c, flag, n) case c: do { flag = n; break; } while(0) 316 FLAG('a', aflag, 1); break; 317 FLAG('d', dflag, 1); break; 318 FLAG('D', dflag, 2); break; 319 FLAG('h', hflag, 1); break; 320 FLAG('l', lflag, 1); break; 321 FLAG('n', nflag, 1); break; 322 FLAG('q', qflag, 1); break; 323 FLAG('s', sflag, 1); break; 324 FLAG('S', Sflag, 1); break; 325 #undef FLAG 326 default: 327 fatal("Invalid option specified, terminating"); 328 /*NOTREACHED*/ 329 } 330 } 331 argc -= optind; 332 argv += optind; 333 if (argc > 0) 334 fatal("bogus extra arguments"); 335 336 if (geteuid()) { 337 nflag = 1; 338 fprintf(stderr, "No kernel update is allowed\n"); 339 } 340 openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON); 341 logopened++; 342 init(); 343 ifconfig(); 344 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 345 if (ifcp->ifc_index < 0) { 346 fprintf(stderr, 347 "No ifindex found at %s (no link-local address?)\n", 348 ifcp->ifc_name); 349 error++; 350 } 351 } 352 if (error) 353 exit(1); 354 if (loopifcp == NULL) 355 fatal("No loopback found"); 356 loopifindex = loopifcp->ifc_index; 357 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) 358 ifrt(ifcp, 0); 359 filterconfig(); 360 krtread(0); 361 if (dflag) 362 ifrtdump(0); 363 364 if (dflag == 0) { 365 #if 1 366 if (daemon(0, 0) < 0) 367 fatal("daemon"); 368 #else 369 if (fork()) 370 exit(0); 371 if (setsid() < 0) 372 fatal("setid"); 373 #endif 374 } 375 pid = getpid(); 376 if ((pidfile = fopen(ROUTE6D_PID, "w")) != NULL) { 377 fprintf(pidfile, "%d\n", pid); 378 fclose(pidfile); 379 } 380 381 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) 382 fatal("malloc"); 383 memset(ripbuf, 0, RIP6_MAXMTU); 384 ripbuf->rip6_cmd = RIP6_RESPONSE; 385 ripbuf->rip6_vers = RIP6_VERSION; 386 ripbuf->rip6_res1[0] = 0; 387 ripbuf->rip6_res1[1] = 0; 388 389 if (signal(SIGALRM, ripalarm) == SIG_ERR) 390 fatal("signal: SIGALRM"); 391 if (signal(SIGQUIT, rtdexit) == SIG_ERR) 392 fatal("signal: SIGQUIT"); 393 if (signal(SIGTERM, rtdexit) == SIG_ERR) 394 fatal("signal: SIGTERM"); 395 if (signal(SIGUSR1, ifrtdump) == SIG_ERR) 396 fatal("signal: SIGUSR1"); 397 if (signal(SIGHUP, ifrtdump) == SIG_ERR) 398 fatal("signal: SIGHUP"); 399 if (signal(SIGINT, ifrtdump) == SIG_ERR) 400 fatal("signal: SIGINT"); 401 /* 402 * To avoid rip packet congestion (not on a cable but in this 403 * process), wait for a moment to send the first RIP6_RESPONSE 404 * packets. 405 */ 406 alarm(ripinterval(INIT_INTERVAL6)); 407 408 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 409 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 410 sendrequest(ifcp); 411 } 412 413 syslog(LOG_INFO, "**** Started ****"); 414 sigemptyset(&mask); 415 sigaddset(&mask, SIGALRM); 416 while (1) { 417 fd_set recvec; 418 419 FD_COPY(&sockvec, &recvec); 420 switch (select(FD_SETSIZE, &recvec, 0, 0, 0)) { 421 case -1: 422 if (errno == EINTR) 423 continue; 424 fatal("select"); 425 case 0: 426 continue; 427 default: 428 if (FD_ISSET(ripsock, &recvec)) { 429 sigprocmask(SIG_BLOCK, &mask, &omask); 430 riprecv(); 431 sigprocmask(SIG_SETMASK, &omask, NULL); 432 } 433 if (FD_ISSET(rtsock, &recvec)) { 434 sigprocmask(SIG_BLOCK, &mask, &omask); 435 rtrecv(); 436 sigprocmask(SIG_SETMASK, &omask, NULL); 437 } 438 } 439 } 440 } 441 442 /* 443 * gracefully exits after resetting sockopts. 444 */ 445 /* ARGSUSED */ 446 void 447 rtdexit(sig) 448 int sig; 449 { 450 struct riprt *rrt; 451 452 alarm(0); 453 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 454 if (rrt->rrt_rflags & RRTF_AGGREGATE) { 455 delroute(&rrt->rrt_info, &rrt->rrt_gw); 456 } 457 } 458 close(ripsock); 459 close(rtsock); 460 syslog(LOG_INFO, "**** Terminated ****"); 461 closelog(); 462 exit(1); 463 } 464 465 /* 466 * Called periodically: 467 * 1. age out the learned route. remove it if necessary. 468 * 2. submit RIP6_RESPONSE packets. 469 * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have 470 * to invoke this function in every 1 or 5 or 10 seconds only to age the 471 * routes more precisely. 472 */ 473 /* ARGSUSED */ 474 void 475 ripalarm(sig) 476 int sig; 477 { 478 struct ifc *ifcp; 479 struct riprt *rrt, *rrt_prev, *rrt_next; 480 time_t t_lifetime, t_holddown; 481 482 /* age the RIP routes */ 483 rrt_prev = 0; 484 t_lifetime = time(NULL) - RIP_LIFETIME; 485 t_holddown = t_lifetime - RIP_HOLDDOWN; 486 for (rrt = riprt; rrt; rrt = rrt_next) { 487 rrt_next = rrt->rrt_next; 488 489 if (rrt->rrt_t == 0) { 490 rrt_prev = rrt; 491 continue; 492 } 493 if (rrt->rrt_t < t_holddown) { 494 if (rrt_prev) { 495 rrt_prev->rrt_next = rrt->rrt_next; 496 } else { 497 riprt = rrt->rrt_next; 498 } 499 delroute(&rrt->rrt_info, &rrt->rrt_gw); 500 free(rrt); 501 continue; 502 } 503 if (rrt->rrt_t < t_lifetime) 504 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 505 rrt_prev = rrt; 506 } 507 /* Supply updates */ 508 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 509 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 510 ripsend(ifcp, &ifcp->ifc_ripsin, 0); 511 } 512 alarm(ripinterval(SUPPLY_INTERVAL6)); 513 } 514 515 void 516 init() 517 { 518 int i, int0, int255, error; 519 struct addrinfo hints, *res; 520 char port[10]; 521 522 ifc = (struct ifc *)NULL; 523 nifc = 0; 524 nindex2ifc = 0; /*initial guess*/ 525 index2ifc = NULL; 526 snprintf(port, sizeof(port), "%d", RIP6_PORT); 527 528 memset(&hints, 0, sizeof(hints)); 529 hints.ai_family = PF_INET6; 530 hints.ai_socktype = SOCK_DGRAM; 531 hints.ai_flags = AI_PASSIVE; 532 error = getaddrinfo(NULL, port, &hints, &res); 533 if (error) 534 fatal(gai_strerror(error)); 535 if (res->ai_next) 536 fatal(":: resolved to multiple address"); 537 538 int0 = 0; int255 = 255; 539 ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 540 if (ripsock < 0) 541 fatal("rip socket"); 542 if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) 543 fatal("rip bind"); 544 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 545 &int255, sizeof(int255)) < 0) 546 fatal("rip IPV6_MULTICAST_HOPS"); 547 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 548 &int0, sizeof(int0)) < 0) 549 fatal("rip IPV6_MULTICAST_LOOP"); 550 551 i = 1; 552 #ifdef IPV6_RECVPKTINFO 553 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &i, 554 sizeof(i)) < 0) 555 fatal("rip IPV6_RECVPKTINFO"); 556 #else /* old adv. API */ 557 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO, &i, 558 sizeof(i)) < 0) 559 fatal("rip IPV6_PKTINFO"); 560 #endif 561 562 memset(&hints, 0, sizeof(hints)); 563 hints.ai_family = PF_INET6; 564 hints.ai_socktype = SOCK_DGRAM; 565 error = getaddrinfo(RIP6_DEST, port, &hints, &res); 566 if (error) 567 fatal(gai_strerror(error)); 568 if (res->ai_next) 569 fatal("%s resolved to multiple address", RIP6_DEST); 570 memcpy(&ripsin, res->ai_addr, res->ai_addrlen); 571 572 #ifdef FD_ZERO 573 FD_ZERO(&sockvec); 574 #else 575 memset(&sockvec, 0, sizeof(sockvec)); 576 #endif 577 FD_SET(ripsock, &sockvec); 578 579 if (nflag == 0) { 580 if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) 581 fatal("route socket"); 582 FD_SET(rtsock, &sockvec); 583 } else 584 rtsock = -1; /*just for safety */ 585 } 586 587 #define RIPSIZE(n) \ 588 (sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6)) 589 590 /* 591 * ripflush flushes the rip datagram stored in the rip buffer 592 */ 593 static int nrt; 594 static struct netinfo6 *np; 595 596 void 597 ripflush(ifcp, sin) 598 struct ifc *ifcp; 599 struct sockaddr_in6 *sin; 600 { 601 int i; 602 int error; 603 604 if (ifcp) 605 tracet(1, "Send(%s): info(%d) to %s.%d\n", 606 ifcp->ifc_name, nrt, 607 inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port)); 608 else 609 tracet(1, "Send: info(%d) to %s.%d\n", 610 nrt, inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port)); 611 if (dflag >= 2) { 612 np = ripbuf->rip6_nets; 613 for (i = 0; i < nrt; i++, np++) { 614 if (np->rip6_metric == NEXTHOP_METRIC) { 615 if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) 616 trace(2, " NextHop reset"); 617 else { 618 trace(2, " NextHop %s", 619 inet6_n2p(&np->rip6_dest)); 620 } 621 } else { 622 trace(2, " %s/%d[%d]", 623 inet6_n2p(&np->rip6_dest), 624 np->rip6_plen, np->rip6_metric); 625 } 626 if (np->rip6_tag) { 627 trace(2, " tag=0x%04x", 628 ntohs(np->rip6_tag) & 0xffff); 629 } 630 trace(2, "\n"); 631 } 632 } 633 error = sendpacket(sin, RIPSIZE(nrt)); 634 if (error == EAFNOSUPPORT) { 635 /* Protocol not supported */ 636 tracet(1, "Could not send info to %s (%s): " 637 "set IFF_UP to 0\n", 638 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 639 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 640 } 641 nrt = 0; np = ripbuf->rip6_nets; 642 } 643 644 /* 645 * Generate RIP6_RESPONSE packets and send them. 646 */ 647 void 648 ripsend(ifcp, sin, flag) 649 struct ifc *ifcp; 650 struct sockaddr_in6 *sin; 651 int flag; 652 { 653 struct riprt *rrt; 654 struct in6_addr *nh; /* next hop */ 655 struct in6_addr ia; 656 struct iff *iffp; 657 int maxrte, ok; 658 659 if (ifcp == NULL) { 660 /* 661 * Request from non-link local address is not 662 * a regular route6d update. 663 */ 664 maxrte = (IFMINMTU - sizeof(struct ip6_hdr) - 665 sizeof(struct udphdr) - 666 sizeof(struct rip6) + sizeof(struct netinfo6)) / 667 sizeof(struct netinfo6); 668 nrt = 0; np = ripbuf->rip6_nets; nh = NULL; 669 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 670 if (rrt->rrt_rflags & RRTF_NOADVERTISE) 671 continue; 672 /* Put the route to the buffer */ 673 *np = rrt->rrt_info; 674 np++; nrt++; 675 if (nrt == maxrte) { 676 ripflush(NULL, sin); 677 nh = NULL; 678 } 679 } 680 if (nrt) /* Send last packet */ 681 ripflush(NULL, sin); 682 return; 683 } 684 685 if ((flag & RRTF_SENDANYWAY) == 0 && 686 (qflag || (ifcp->ifc_flags & IFF_LOOPBACK))) 687 return; 688 if (iff_find(ifcp, 'N') != NULL) 689 return; 690 if (iff_find(ifcp, 'T') != NULL) { 691 struct netinfo6 rrt_info; 692 memset(&rrt_info, 0, sizeof(struct netinfo6)); 693 rrt_info.rip6_dest = in6addr_any; 694 rrt_info.rip6_plen = 0; 695 rrt_info.rip6_metric = 1; 696 rrt_info.rip6_tag = htons(routetag & 0xffff); 697 np = ripbuf->rip6_nets; 698 *np = rrt_info; 699 nrt = 1; 700 ripflush(ifcp, sin); 701 return; 702 } 703 maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) - 704 sizeof(struct udphdr) - 705 sizeof(struct rip6) + sizeof(struct netinfo6)) / 706 sizeof(struct netinfo6); 707 nrt = 0; np = ripbuf->rip6_nets; nh = NULL; 708 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 709 if (rrt->rrt_rflags & RRTF_NOADVERTISE) 710 continue; 711 /* Need to check filer here */ 712 ok = 1; 713 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 714 if (iffp->iff_type != 'A') 715 continue; 716 if (rrt->rrt_info.rip6_plen <= iffp->iff_plen) 717 continue; 718 ia = rrt->rrt_info.rip6_dest; 719 applyplen(&ia, iffp->iff_plen); 720 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 721 ok = 0; 722 break; 723 } 724 } 725 if (!ok) 726 continue; 727 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 728 if (iffp->iff_type != 'O') 729 continue; 730 ok = 0; 731 if (rrt->rrt_info.rip6_plen < iffp->iff_plen) 732 continue; 733 ia = rrt->rrt_info.rip6_dest; 734 applyplen(&ia, iffp->iff_plen); 735 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 736 ok = 1; 737 break; 738 } 739 } 740 if (!ok) 741 continue; 742 /* Check split horizon and other conditions */ 743 if (tobeadv(rrt, ifcp) == 0) 744 continue; 745 /* Only considers the routes with flag if specified */ 746 if ((flag & RRTF_CHANGED) && 747 (rrt->rrt_rflags & RRTF_CHANGED) == 0) 748 continue; 749 /* Check nexthop */ 750 if (rrt->rrt_index == ifcp->ifc_index && 751 !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) && 752 (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) == 0) { 753 if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) { 754 if (nrt == maxrte - 2) 755 ripflush(ifcp, sin); 756 np->rip6_dest = rrt->rrt_gw; 757 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) 758 SET_IN6_LINKLOCAL_IFINDEX(np->rip6_dest, 0); 759 np->rip6_plen = 0; 760 np->rip6_tag = 0; 761 np->rip6_metric = NEXTHOP_METRIC; 762 nh = &rrt->rrt_gw; 763 np++; nrt++; 764 } 765 } else if (nh && (rrt->rrt_index != ifcp->ifc_index || 766 !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) || 767 rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)) { 768 /* Reset nexthop */ 769 if (nrt == maxrte - 2) 770 ripflush(ifcp, sin); 771 memset(np, 0, sizeof(struct netinfo6)); 772 np->rip6_metric = NEXTHOP_METRIC; 773 nh = NULL; 774 np++; nrt++; 775 } 776 /* Put the route to the buffer */ 777 *np = rrt->rrt_info; 778 np++; nrt++; 779 if (nrt == maxrte) { 780 ripflush(ifcp, sin); 781 nh = NULL; 782 } 783 } 784 if (nrt) /* Send last packet */ 785 ripflush(ifcp, sin); 786 } 787 788 /* 789 * Determine if the route is to be advertised on the specified interface. 790 * It checks options specified in the arguments and the split horizon rule. 791 */ 792 int 793 tobeadv(rrt, ifcp) 794 struct riprt *rrt; 795 struct ifc *ifcp; 796 { 797 798 /* Special care for static routes */ 799 if (rrt->rrt_flags & RTF_STATIC) { 800 /* XXX don't advertise reject/blackhole routes */ 801 if (rrt->rrt_flags & (RTF_REJECT | RTF_BLACKHOLE)) 802 return 0; 803 804 if (Sflag) /* Yes, advertise it anyway */ 805 return 1; 806 if (sflag && rrt->rrt_index != ifcp->ifc_index) 807 return 1; 808 return 0; 809 } 810 /* Regular split horizon */ 811 if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index) 812 return 0; 813 return 1; 814 } 815 816 /* 817 * Send a rip packet actually. 818 */ 819 int 820 sendpacket(sin, len) 821 struct sockaddr_in6 *sin; 822 int len; 823 { 824 /* 825 * MSG_DONTROUTE should not be specified when it responds with a 826 * RIP6_REQUEST message. SO_DONTROUTE has been specified to 827 * other sockets. 828 */ 829 struct msghdr m; 830 struct cmsghdr *cm; 831 struct iovec iov[2]; 832 u_char cmsgbuf[256]; 833 struct in6_pktinfo *pi; 834 int index; 835 struct sockaddr_in6 sincopy; 836 837 /* do not overwrite the given sin */ 838 sincopy = *sin; 839 sin = &sincopy; 840 841 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) 842 || IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) { 843 index = IN6_LINKLOCAL_IFINDEX(sin->sin6_addr); 844 SET_IN6_LINKLOCAL_IFINDEX(sin->sin6_addr, 0); 845 } else 846 index = 0; 847 848 m.msg_name = (caddr_t)sin; 849 m.msg_namelen = sizeof(*sin); 850 iov[0].iov_base = (caddr_t)ripbuf; 851 iov[0].iov_len = len; 852 m.msg_iov = iov; 853 m.msg_iovlen = 1; 854 if (!index) { 855 m.msg_control = NULL; 856 m.msg_controllen = 0; 857 } else { 858 memset(cmsgbuf, 0, sizeof(cmsgbuf)); 859 cm = (struct cmsghdr *)cmsgbuf; 860 m.msg_control = (caddr_t)cm; 861 m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); 862 863 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 864 cm->cmsg_level = IPPROTO_IPV6; 865 cm->cmsg_type = IPV6_PKTINFO; 866 pi = (struct in6_pktinfo *)CMSG_DATA(cm); 867 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/ 868 pi->ipi6_ifindex = index; 869 } 870 871 if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) { 872 trace(1, "sendmsg: %s\n", strerror(errno)); 873 return errno; 874 } 875 876 return 0; 877 } 878 879 /* 880 * Receive and process RIP packets. Update the routes/kernel forwarding 881 * table if necessary. 882 */ 883 void 884 riprecv() 885 { 886 struct ifc *ifcp, *ic; 887 struct sockaddr_in6 fsock; 888 struct in6_addr nh; /* next hop */ 889 struct rip6 *rp; 890 struct netinfo6 *np, *nq; 891 struct riprt *rrt; 892 int len, nn, need_trigger, index; 893 char buf[4 * RIP6_MAXMTU]; 894 time_t t; 895 struct msghdr m; 896 struct cmsghdr *cm; 897 struct iovec iov[2]; 898 u_char cmsgbuf[256]; 899 struct in6_pktinfo *pi; 900 struct iff *iffp; 901 struct in6_addr ia; 902 int ok; 903 904 need_trigger = 0; 905 906 m.msg_name = (caddr_t)&fsock; 907 m.msg_namelen = sizeof(fsock); 908 iov[0].iov_base = (caddr_t)buf; 909 iov[0].iov_len = sizeof(buf); 910 m.msg_iov = iov; 911 m.msg_iovlen = 1; 912 cm = (struct cmsghdr *)cmsgbuf; 913 m.msg_control = (caddr_t)cm; 914 m.msg_controllen = sizeof(cmsgbuf); 915 if ((len = recvmsg(ripsock, &m, 0)) < 0) 916 fatal("recvmsg"); 917 index = 0; 918 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m); 919 cm; 920 cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) { 921 if (cm->cmsg_level == IPPROTO_IPV6 922 && cm->cmsg_type == IPV6_PKTINFO) { 923 pi = (struct in6_pktinfo *)(CMSG_DATA(cm)); 924 index = pi->ipi6_ifindex; 925 break; 926 } 927 } 928 if (index && IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) 929 SET_IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr, index); 930 931 nh = fsock.sin6_addr; 932 nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 933 sizeof(struct netinfo6); 934 rp = (struct rip6 *)buf; 935 np = rp->rip6_nets; 936 937 if (rp->rip6_vers != RIP6_VERSION) { 938 trace(1, "Incorrect RIP version %d\n", rp->rip6_vers); 939 return; 940 } 941 if (rp->rip6_cmd == RIP6_REQUEST) { 942 if (index && index < nindex2ifc) { 943 ifcp = index2ifc[index]; 944 riprequest(ifcp, np, nn, &fsock); 945 } else { 946 riprequest(NULL, np, nn, &fsock); 947 } 948 return; 949 } 950 951 if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) { 952 trace(1, "Packets from non-ll addr: %s\n", 953 inet6_n2p(&fsock.sin6_addr)); 954 return; /* Ignore packets from non-link-local addr */ 955 } 956 index = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr); 957 ifcp = (index < nindex2ifc) ? index2ifc[index] : NULL; 958 if (!ifcp) { 959 trace(1, "Packets to unknown interface index %d\n", index); 960 return; /* Ignore it */ 961 } 962 if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr)) 963 return; /* The packet is from me; ignore */ 964 if (rp->rip6_cmd != RIP6_RESPONSE) { 965 trace(1, "Invalid command %d\n", rp->rip6_cmd); 966 return; 967 } 968 if (iff_find(ifcp, 'N') != NULL) 969 return; 970 tracet(1, "Recv(%s): from %s.%d info(%d)\n", 971 ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), nn); 972 973 t = time(NULL); 974 for (; nn; nn--, np++) { 975 if (np->rip6_metric == NEXTHOP_METRIC) { 976 /* modify neighbor address */ 977 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 978 nh = np->rip6_dest; 979 SET_IN6_LINKLOCAL_IFINDEX(nh, index); 980 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 981 } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) { 982 nh = fsock.sin6_addr; 983 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 984 } else { 985 nh = fsock.sin6_addr; 986 trace(1, "\tInvalid Nexthop: %s\n", 987 inet6_n2p(&np->rip6_dest)); 988 } 989 continue; 990 } 991 if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) { 992 trace(1, "\tMulticast netinfo6: %s/%d [%d]\n", 993 inet6_n2p(&np->rip6_dest), 994 np->rip6_plen, np->rip6_metric); 995 continue; 996 } 997 if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) { 998 trace(1, "\tLoopback netinfo6: %s/%d [%d]\n", 999 inet6_n2p(&np->rip6_dest), 1000 np->rip6_plen, np->rip6_metric); 1001 continue; 1002 } 1003 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 1004 trace(1, "\tLink Local netinfo6: %s/%d [%d]\n", 1005 inet6_n2p(&np->rip6_dest), 1006 np->rip6_plen, np->rip6_metric); 1007 continue; 1008 } 1009 /* may need to pass sitelocal prefix in some case, however*/ 1010 if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) { 1011 trace(1, "\tSite Local netinfo6: %s/%d [%d]\n", 1012 inet6_n2p(&np->rip6_dest), 1013 np->rip6_plen, np->rip6_metric); 1014 continue; 1015 } 1016 trace(2, "\tnetinfo6: %s/%d [%d]", 1017 inet6_n2p(&np->rip6_dest), 1018 np->rip6_plen, np->rip6_metric); 1019 if (np->rip6_tag) 1020 trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff); 1021 if (dflag >= 2) { 1022 ia = np->rip6_dest; 1023 applyplen(&ia, np->rip6_plen); 1024 if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest)) 1025 trace(2, " [junk outside prefix]"); 1026 } 1027 1028 /* Listen-only filter */ 1029 ok = 1; /* if there's no L filter, it is ok */ 1030 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 1031 if (iffp->iff_type != 'L') 1032 continue; 1033 ok = 0; 1034 if (np->rip6_plen < iffp->iff_plen) 1035 continue; 1036 /* special rule: ::/0 means default, not "in /0" */ 1037 if (iffp->iff_plen == 0 && np->rip6_plen > 0) 1038 continue; 1039 ia = np->rip6_dest; 1040 applyplen(&ia, iffp->iff_plen); 1041 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 1042 ok = 1; 1043 break; 1044 } 1045 } 1046 if (!ok) { 1047 trace(2, " (filtered)\n"); 1048 continue; 1049 } 1050 1051 trace(2, "\n"); 1052 np->rip6_metric++; 1053 np->rip6_metric += ifcp->ifc_metric; 1054 if (np->rip6_metric > HOPCNT_INFINITY6) 1055 np->rip6_metric = HOPCNT_INFINITY6; 1056 1057 applyplen(&np->rip6_dest, np->rip6_plen); 1058 if ((rrt = rtsearch(np)) != NULL) { 1059 if (rrt->rrt_t == 0) 1060 continue; /* Intf route has priority */ 1061 nq = &rrt->rrt_info; 1062 if (nq->rip6_metric > np->rip6_metric) { 1063 if (rrt->rrt_index == ifcp->ifc_index && 1064 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 1065 /* Small metric from the same gateway */ 1066 nq->rip6_metric = np->rip6_metric; 1067 } else { 1068 /* Better route found */ 1069 rrt->rrt_index = ifcp->ifc_index; 1070 /* Update routing table */ 1071 delroute(nq, &rrt->rrt_gw); 1072 rrt->rrt_gw = nh; 1073 *nq = *np; 1074 addroute(rrt, &nh, ifcp); 1075 } 1076 rrt->rrt_rflags |= RRTF_CHANGED; 1077 rrt->rrt_t = t; 1078 need_trigger = 1; 1079 } else if (nq->rip6_metric < np->rip6_metric && 1080 rrt->rrt_index == ifcp->ifc_index && 1081 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 1082 /* Got worse route from same gw */ 1083 nq->rip6_metric = np->rip6_metric; 1084 rrt->rrt_t = t; 1085 rrt->rrt_rflags |= RRTF_CHANGED; 1086 need_trigger = 1; 1087 } else if (nq->rip6_metric == np->rip6_metric && 1088 rrt->rrt_index == ifcp->ifc_index && 1089 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw) && 1090 np->rip6_metric < HOPCNT_INFINITY6) { 1091 /* same metric, same route from same gw */ 1092 rrt->rrt_t = t; 1093 } 1094 /* 1095 * if nq->rip6_metric == HOPCNT_INFINITY6 then 1096 * do not update age value. Do nothing. 1097 */ 1098 } else if (np->rip6_metric < HOPCNT_INFINITY6) { 1099 /* Got a new valid route */ 1100 if ((rrt = MALLOC(struct riprt)) == NULL) 1101 fatal("malloc: struct riprt"); 1102 memset(rrt, 0, sizeof(*rrt)); 1103 nq = &rrt->rrt_info; 1104 1105 rrt->rrt_same = NULL; 1106 rrt->rrt_index = ifcp->ifc_index; 1107 rrt->rrt_flags = RTF_UP|RTF_GATEWAY; 1108 rrt->rrt_gw = nh; 1109 *nq = *np; 1110 applyplen(&nq->rip6_dest, nq->rip6_plen); 1111 if (nq->rip6_plen == sizeof(struct in6_addr) * 8) 1112 rrt->rrt_flags |= RTF_HOST; 1113 1114 /* Put the route to the list */ 1115 rrt->rrt_next = riprt; 1116 riprt = rrt; 1117 /* Update routing table */ 1118 addroute(rrt, &nh, ifcp); 1119 rrt->rrt_rflags |= RRTF_CHANGED; 1120 need_trigger = 1; 1121 rrt->rrt_t = t; 1122 } 1123 } 1124 /* XXX need to care the interval between triggered updates */ 1125 if (need_trigger) { 1126 if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) { 1127 for (ic = ifc; ic; ic = ic->ifc_next) { 1128 if (ifcp->ifc_index == ic->ifc_index) 1129 continue; 1130 if (ic->ifc_flags & IFF_UP) 1131 ripsend(ic, &ic->ifc_ripsin, 1132 RRTF_CHANGED); 1133 } 1134 } 1135 /* Reset the flag */ 1136 for (rrt = riprt; rrt; rrt = rrt->rrt_next) 1137 rrt->rrt_rflags &= ~RRTF_CHANGED; 1138 } 1139 } 1140 1141 /* 1142 * Send all routes request packet to the specified interface. 1143 */ 1144 void 1145 sendrequest(ifcp) 1146 struct ifc *ifcp; 1147 { 1148 struct netinfo6 *np; 1149 int error; 1150 1151 if (ifcp->ifc_flags & IFF_LOOPBACK) 1152 return; 1153 ripbuf->rip6_cmd = RIP6_REQUEST; 1154 np = ripbuf->rip6_nets; 1155 memset(np, 0, sizeof(struct netinfo6)); 1156 np->rip6_metric = HOPCNT_INFINITY6; 1157 tracet(1, "Send rtdump Request to %s (%s)\n", 1158 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 1159 error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1)); 1160 if (error == EAFNOSUPPORT) { 1161 /* Protocol not supported */ 1162 tracet(1, "Could not send rtdump Request to %s (%s): " 1163 "set IFF_UP to 0\n", 1164 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 1165 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 1166 } 1167 ripbuf->rip6_cmd = RIP6_RESPONSE; 1168 } 1169 1170 /* 1171 * Process a RIP6_REQUEST packet. 1172 */ 1173 void 1174 riprequest(ifcp, np, nn, sin) 1175 struct ifc *ifcp; 1176 struct netinfo6 *np; 1177 int nn; 1178 struct sockaddr_in6 *sin; 1179 { 1180 int i; 1181 struct riprt *rrt; 1182 1183 if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) && 1184 np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) { 1185 /* Specific response, don't split-horizon */ 1186 trace(1, "\tRIP Request\n"); 1187 for (i = 0; i < nn; i++, np++) { 1188 rrt = rtsearch(np); 1189 if (rrt) 1190 np->rip6_metric = rrt->rrt_info.rip6_metric; 1191 else 1192 np->rip6_metric = HOPCNT_INFINITY6; 1193 } 1194 (void)sendpacket(sin, RIPSIZE(nn)); 1195 return; 1196 } 1197 /* Whole routing table dump */ 1198 trace(1, "\tRIP Request -- whole routing table\n"); 1199 ripsend(ifcp, sin, RRTF_SENDANYWAY); 1200 } 1201 1202 /* 1203 * Get information of each interface. 1204 */ 1205 void 1206 ifconfig() 1207 { 1208 #ifdef HAVE_GETIFADDRS 1209 struct ifaddrs *ifap, *ifa; 1210 struct ifc *ifcp; 1211 struct ipv6_mreq mreq; 1212 int s; 1213 1214 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1215 fatal("socket"); 1216 1217 if (getifaddrs(&ifap) != 0) 1218 fatal("getifaddrs"); 1219 1220 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1221 if (ifa->ifa_addr->sa_family != AF_INET6) 1222 continue; 1223 ifcp = ifc_find(ifa->ifa_name); 1224 /* we are interested in multicast-capable interfaces */ 1225 if ((ifa->ifa_flags & IFF_MULTICAST) == 0) 1226 continue; 1227 if (!ifcp) { 1228 /* new interface */ 1229 if ((ifcp = MALLOC(struct ifc)) == NULL) 1230 fatal("malloc: struct ifc"); 1231 memset(ifcp, 0, sizeof(*ifcp)); 1232 ifcp->ifc_index = -1; 1233 ifcp->ifc_next = ifc; 1234 ifc = ifcp; 1235 nifc++; 1236 ifcp->ifc_name = allocopy(ifa->ifa_name); 1237 ifcp->ifc_addr = 0; 1238 ifcp->ifc_filter = 0; 1239 ifcp->ifc_flags = ifa->ifa_flags; 1240 trace(1, "newif %s <%s>\n", ifcp->ifc_name, 1241 ifflags(ifcp->ifc_flags)); 1242 if (!strcmp(ifcp->ifc_name, LOOPBACK_IF)) 1243 loopifcp = ifcp; 1244 } else { 1245 /* update flag, this may be up again */ 1246 if (ifcp->ifc_flags != ifa->ifa_flags) { 1247 trace(1, "%s: <%s> -> ", ifcp->ifc_name, 1248 ifflags(ifcp->ifc_flags)); 1249 trace(1, "<%s>\n", ifflags(ifa->ifa_flags)); 1250 } 1251 ifcp->ifc_flags = ifa->ifa_flags; 1252 } 1253 ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s); 1254 if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP 1255 && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { 1256 mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; 1257 mreq.ipv6mr_interface = ifcp->ifc_index; 1258 if (setsockopt(ripsock, IPPROTO_IPV6, 1259 IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) < 0) 1260 fatal("IPV6_JOIN_GROUP"); 1261 trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST); 1262 ifcp->ifc_joined++; 1263 } 1264 } 1265 close(s); 1266 freeifaddrs(ifap); 1267 #else 1268 int s, i; 1269 char *buf; 1270 struct ifconf ifconf; 1271 struct ifreq *ifrp, ifr; 1272 struct ifc *ifcp; 1273 struct ipv6_mreq mreq; 1274 int bufsiz; 1275 1276 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1277 fatal("socket"); 1278 1279 /* wild guess - v4, media, link, v6 * 3 */ 1280 bufsiz = if_maxindex() * sizeof(struct ifreq) * 6; 1281 if ((buf = (char *)malloc(bufsiz)) == NULL) 1282 fatal("malloc"); 1283 1284 /* 1285 * ioctl(SIOCGIFCONF) does not return error on buffer size. 1286 * we'll try to guess the buffer size by trying it twice, with 1287 * different buffer size. 1288 */ 1289 ifconf.ifc_buf = buf; 1290 ifconf.ifc_len = bufsiz / 2; 1291 if (ioctl(s, SIOCGIFCONF, (char *)&ifconf) < 0) 1292 fatal("ioctl: SIOCGIFCONF"); 1293 i = ifconf.ifc_len; 1294 while (1) { 1295 char *newbuf; 1296 1297 ifconf.ifc_buf = buf; 1298 ifconf.ifc_len = bufsiz; 1299 if (ioctl(s, SIOCGIFCONF, (char *)&ifconf) < 0) 1300 fatal("ioctl: SIOCGIFCONF"); 1301 if (i == ifconf.ifc_len) 1302 break; 1303 i = ifconf.ifc_len; 1304 bufsiz *= 2; 1305 if ((newbuf = (char *)realloc(buf, bufsiz)) == NULL) { 1306 free(buf); 1307 fatal("realloc"); 1308 } 1309 buf = newbuf; 1310 } 1311 for (i = 0; i < ifconf.ifc_len; ) { 1312 ifrp = (struct ifreq *)(buf + i); 1313 if (ifrp->ifr_addr.sa_family != AF_INET6) 1314 goto skip; 1315 ifcp = ifc_find(ifrp->ifr_name); 1316 strcpy(ifr.ifr_name, ifrp->ifr_name); 1317 if (ioctl(s, SIOCGIFFLAGS, (char *)&ifr) < 0) 1318 fatal("ioctl: SIOCGIFFLAGS"); 1319 /* we are interested in multicast-capable interfaces */ 1320 if ((ifr.ifr_flags & IFF_MULTICAST) == 0) 1321 goto skip; 1322 if (!ifcp) { 1323 /* new interface */ 1324 if ((ifcp = MALLOC(struct ifc)) == NULL) 1325 fatal("malloc: struct ifc"); 1326 memset(ifcp, 0, sizeof(*ifcp)); 1327 ifcp->ifc_index = -1; 1328 ifcp->ifc_next = ifc; 1329 ifc = ifcp; 1330 nifc++; 1331 ifcp->ifc_name = allocopy(ifrp->ifr_name); 1332 ifcp->ifc_addr = 0; 1333 ifcp->ifc_filter = 0; 1334 ifcp->ifc_flags = ifr.ifr_flags; 1335 trace(1, "newif %s <%s>\n", ifcp->ifc_name, 1336 ifflags(ifcp->ifc_flags)); 1337 if (!strcmp(ifcp->ifc_name, LOOPBACK_IF)) 1338 loopifcp = ifcp; 1339 } else { 1340 /* update flag, this may be up again */ 1341 if (ifcp->ifc_flags != ifr.ifr_flags) { 1342 trace(1, "%s: <%s> -> ", ifcp->ifc_name, 1343 ifflags(ifcp->ifc_flags)); 1344 trace(1, "<%s>\n", ifflags(ifr.ifr_flags)); 1345 } 1346 ifcp->ifc_flags = ifr.ifr_flags; 1347 } 1348 ifconfig1(ifrp->ifr_name, &ifrp->ifr_addr, ifcp, s); 1349 if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP 1350 && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { 1351 mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; 1352 mreq.ipv6mr_interface = ifcp->ifc_index; 1353 if (setsockopt(ripsock, IPPROTO_IPV6, 1354 IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) < 0) 1355 fatal("IPV6_JOIN_GROUP"); 1356 trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST); 1357 ifcp->ifc_joined++; 1358 } 1359 skip: 1360 i += IFNAMSIZ; 1361 if (ifrp->ifr_addr.sa_len > sizeof(struct sockaddr)) 1362 i += ifrp->ifr_addr.sa_len; 1363 else 1364 i += sizeof(struct sockaddr); 1365 } 1366 close(s); 1367 free(buf); 1368 #endif 1369 } 1370 1371 void 1372 ifconfig1(name, sa, ifcp, s) 1373 const char *name; 1374 const struct sockaddr *sa; 1375 struct ifc *ifcp; 1376 int s; 1377 { 1378 struct in6_ifreq ifr; 1379 struct sockaddr_in6 *sin; 1380 struct ifac *ifa; 1381 int plen; 1382 char buf[BUFSIZ]; 1383 1384 sin = (struct sockaddr_in6 *)sa; 1385 ifr.ifr_addr = *sin; 1386 strcpy(ifr.ifr_name, name); 1387 if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) 1388 fatal("ioctl: SIOCGIFNETMASK_IN6"); 1389 plen = mask2len(&ifr.ifr_addr.sin6_addr, 16); 1390 if ((ifa = ifa_match(ifcp, &sin->sin6_addr, plen)) != NULL) { 1391 /* same interface found */ 1392 /* need check if something changed */ 1393 /* XXX not yet implemented */ 1394 return; 1395 } 1396 /* 1397 * New address is found 1398 */ 1399 if ((ifa = MALLOC(struct ifac)) == NULL) 1400 fatal("malloc: struct ifac"); 1401 memset(ifa, 0, sizeof(*ifa)); 1402 ifa->ifa_conf = ifcp; 1403 ifa->ifa_next = ifcp->ifc_addr; 1404 ifcp->ifc_addr = ifa; 1405 ifa->ifa_addr = sin->sin6_addr; 1406 ifa->ifa_plen = plen; 1407 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1408 ifr.ifr_addr = *sin; 1409 if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) 1410 fatal("ioctl: SIOCGIFDSTADDR_IN6"); 1411 ifa->ifa_raddr = ifr.ifr_dstaddr.sin6_addr; 1412 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, buf, sizeof(buf)); 1413 trace(1, "found address %s/%d -- %s\n", 1414 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen, buf); 1415 } else { 1416 trace(1, "found address %s/%d\n", 1417 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen); 1418 } 1419 if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) { 1420 ifcp->ifc_mylladdr = ifa->ifa_addr; 1421 ifcp->ifc_index = IN6_LINKLOCAL_IFINDEX(ifa->ifa_addr); 1422 memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len); 1423 SET_IN6_LINKLOCAL_IFINDEX(ifcp->ifc_ripsin.sin6_addr, 1424 ifcp->ifc_index); 1425 setindex2ifc(ifcp->ifc_index, ifcp); 1426 ifcp->ifc_mtu = getifmtu(ifcp->ifc_index); 1427 if (ifcp->ifc_mtu > RIP6_MAXMTU) 1428 ifcp->ifc_mtu = RIP6_MAXMTU; 1429 if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) 1430 fatal("ioctl: SIOCGIFMETRIC"); 1431 ifcp->ifc_metric = ifr.ifr_metric; 1432 trace(1, "\tindex: %d, mtu: %d, metric: %d\n", 1433 ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric); 1434 } 1435 } 1436 1437 /* 1438 * Receive and process routing messages. 1439 * Update interface information as necesssary. 1440 */ 1441 void 1442 rtrecv() 1443 { 1444 char buf[BUFSIZ]; 1445 char *p, *q; 1446 struct rt_msghdr *rtm; 1447 struct ifa_msghdr *ifam; 1448 struct if_msghdr *ifm; 1449 int len; 1450 struct ifc *ifcp; 1451 int iface = 0, rtable = 0; 1452 struct sockaddr_in6 *rta[RTAX_MAX]; 1453 int i, addrs; 1454 1455 if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 1456 perror("read from rtsock"); 1457 exit(-1); 1458 } 1459 if (len < sizeof(*rtm)) { 1460 trace(1, "short read from rtsock: %d (should be > %d)\n", 1461 len, sizeof(*rtm)); 1462 return; 1463 } 1464 1465 for (p = buf; p - buf < len; p += ((struct rt_msghdr *)p)->rtm_msglen) { 1466 /* safety against bogus message */ 1467 if (((struct rt_msghdr *)p)->rtm_msglen <= 0) { 1468 trace(1, "bogus rtmsg: length=%d\n", 1469 ((struct rt_msghdr *)p)->rtm_msglen); 1470 break; 1471 } 1472 rtm = NULL; 1473 ifam = NULL; 1474 ifm = NULL; 1475 switch (((struct rt_msghdr *)p)->rtm_type) { 1476 case RTM_NEWADDR: 1477 case RTM_DELADDR: 1478 ifam = (struct ifa_msghdr *)p; 1479 addrs = ifam->ifam_addrs; 1480 q = (char *)(ifam + 1); 1481 break; 1482 case RTM_IFINFO: 1483 ifm = (struct if_msghdr *)p; 1484 addrs = ifm->ifm_addrs; 1485 q = (char *)(ifm + 1); 1486 break; 1487 default: 1488 rtm = (struct rt_msghdr *)p; 1489 addrs = rtm->rtm_addrs; 1490 q = (char *)(rtm + 1); 1491 if (rtm->rtm_version != RTM_VERSION) { 1492 trace(1, "unexpected rtmsg version %d " 1493 "(should be %d)\n", 1494 rtm->rtm_version, RTM_VERSION); 1495 continue; 1496 } 1497 if (rtm->rtm_pid == pid) { 1498 #if 0 1499 trace(1, "rtmsg looped back to me, ignored\n"); 1500 #endif 1501 continue; 1502 } 1503 break; 1504 } 1505 memset(&rta, 0, sizeof(rta)); 1506 for (i = 0; i < RTAX_MAX; i++) { 1507 if (addrs & (1 << i)) { 1508 rta[i] = (struct sockaddr_in6 *)q; 1509 q += ROUNDUP(rta[i]->sin6_len); 1510 } 1511 } 1512 1513 trace(1, "rtsock: %s (addrs=%x)\n", 1514 rttypes((struct rt_msghdr *)p), addrs); 1515 if (dflag >= 2) { 1516 int i; 1517 for (i = 0; 1518 i < ((struct rt_msghdr *)p)->rtm_msglen; 1519 i++) { 1520 fprintf(stderr, "%02x ", p[i] & 0xff); 1521 if (i % 16 == 15) fprintf(stderr, "\n"); 1522 } 1523 fprintf(stderr, "\n"); 1524 } 1525 1526 /* 1527 * Easy ones first. 1528 * 1529 * We may be able to optimize by using ifm->ifm_index or 1530 * ifam->ifam_index. For simplicity we don't do that here. 1531 */ 1532 switch (((struct rt_msghdr *)p)->rtm_type) { 1533 case RTM_NEWADDR: 1534 case RTM_IFINFO: 1535 iface++; 1536 continue; 1537 case RTM_ADD: 1538 rtable++; 1539 continue; 1540 case RTM_LOSING: 1541 case RTM_MISS: 1542 case RTM_RESOLVE: 1543 case RTM_GET: 1544 case RTM_LOCK: 1545 /* nothing to be done here */ 1546 trace(1, "\tnothing to be done, ignored\n"); 1547 continue; 1548 } 1549 1550 #if 0 1551 if (rta[RTAX_DST] == NULL) { 1552 trace(1, "\tno destination, ignored\n"); 1553 continue; 1554 } 1555 if (rta[RTAX_DST]->sin6_family != AF_INET6) { 1556 trace(1, "\taf mismatch, ignored\n"); 1557 continue; 1558 } 1559 if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) { 1560 trace(1, "\tlinklocal destination, ignored\n"); 1561 continue; 1562 } 1563 if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) { 1564 trace(1, "\tloopback destination, ignored\n"); 1565 continue; /* Loopback */ 1566 } 1567 if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) { 1568 trace(1, "\tmulticast destination, ignored\n"); 1569 continue; 1570 } 1571 #endif 1572 1573 /* hard ones */ 1574 switch (((struct rt_msghdr *)p)->rtm_type) { 1575 case RTM_NEWADDR: 1576 case RTM_IFINFO: 1577 case RTM_ADD: 1578 case RTM_LOSING: 1579 case RTM_MISS: 1580 case RTM_RESOLVE: 1581 case RTM_GET: 1582 case RTM_LOCK: 1583 /* should already be handled */ 1584 fatal("rtrecv: never reach here"); 1585 case RTM_DELETE: 1586 if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY] 1587 || !rta[RTAX_NETMASK]) { 1588 trace(1, "\tsome of dst/gw/netamsk are unavailable, ignored\n"); 1589 break; 1590 } 1591 if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY], rta[RTAX_NETMASK]) == 0) { 1592 rtable++; /*just to be sure*/ 1593 } 1594 break; 1595 case RTM_CHANGE: 1596 case RTM_REDIRECT: 1597 trace(1, "\tnot supported yet, ignored\n"); 1598 break; 1599 case RTM_DELADDR: 1600 if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) { 1601 trace(1, "\tno netmask or ifa given, ignored\n"); 1602 break; 1603 } 1604 if (ifam->ifam_index < nindex2ifc) 1605 ifcp = index2ifc[ifam->ifam_index]; 1606 else 1607 ifcp = NULL; 1608 if (!ifcp) { 1609 trace(1, "\tinvalid ifam_index %d, ignored\n", 1610 ifam->ifam_index); 1611 break; 1612 } 1613 rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK]); 1614 iface++; 1615 break; 1616 case RTM_OLDADD: 1617 case RTM_OLDDEL: 1618 trace(1, "\tnot supported yet, ignored\n"); 1619 break; 1620 } 1621 1622 } 1623 1624 if (iface) { 1625 trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n"); 1626 ifconfig(); 1627 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) 1628 ifrt(ifcp, 1); 1629 } 1630 if (rtable) { 1631 trace(1, "rtsock: read routing table again\n"); 1632 krtread(1); 1633 } 1634 } 1635 1636 /* 1637 * remove specified route from the internal routing table. 1638 */ 1639 int 1640 rt_del(sdst, sgw, smask) 1641 const struct sockaddr_in6 *sdst; 1642 const struct sockaddr_in6 *sgw; 1643 const struct sockaddr_in6 *smask; 1644 { 1645 const struct in6_addr *dst = NULL; 1646 const struct in6_addr *gw = NULL; 1647 int prefix; 1648 struct netinfo6 ni6; 1649 struct riprt *rrt = NULL; 1650 time_t t_lifetime; 1651 1652 if (sdst->sin6_family != AF_INET6) { 1653 trace(1, "\tother AF, ignored\n"); 1654 return -1; 1655 } 1656 if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr) 1657 || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback) 1658 || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) { 1659 trace(1, "\taddress %s not interesting, ignored\n", 1660 inet6_n2p(&sdst->sin6_addr)); 1661 return -1; 1662 } 1663 dst = &sdst->sin6_addr; 1664 if (sgw->sin6_family == AF_INET6 1665 && smask->sin6_family == AF_INET6) { 1666 /* easy case */ 1667 gw = &sgw->sin6_addr; 1668 prefix = mask2len(&smask->sin6_addr, 16); 1669 } else if (sgw->sin6_family == AF_LINK) { 1670 /* 1671 * Interface route... a hard case. We need to get the prefix 1672 * length from the kernel, but we now are parsing rtmsg. 1673 * We'll purge matching routes from my list, then get the 1674 * fresh list. 1675 */ 1676 struct riprt *longest; 1677 trace(1, "\t%s is a interface route, guessing prefixlen\n", 1678 inet6_n2p(dst)); 1679 longest = NULL; 1680 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 1681 if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 1682 &sdst->sin6_addr) 1683 && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) { 1684 if (!longest 1685 || longest->rrt_info.rip6_plen < 1686 rrt->rrt_info.rip6_plen) { 1687 longest = rrt; 1688 } 1689 } 1690 } 1691 rrt = longest; 1692 if (!rrt) { 1693 trace(1, "\tno matching interface route found\n"); 1694 return -1; 1695 } 1696 gw = &in6addr_loopback; 1697 prefix = rrt->rrt_info.rip6_plen; 1698 } else { 1699 trace(1, "\tunsupported af: (gw=%d, mask=%d)\n", 1700 sgw->sin6_family, smask->sin6_family); 1701 return -1; 1702 } 1703 1704 trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix); 1705 trace(1, "gw %s\n", inet6_n2p(gw)); 1706 t_lifetime = time(NULL) - RIP_LIFETIME; 1707 /* age route for interface address */ 1708 memset(&ni6, 0, sizeof(ni6)); 1709 ni6.rip6_dest = *dst; 1710 ni6.rip6_plen = prefix; 1711 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 1712 trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest), 1713 ni6.rip6_plen); 1714 if (!rrt && (rrt = rtsearch(&ni6)) == NULL) { 1715 trace(1, "\tno route found\n"); 1716 return -1; 1717 } 1718 if ((rrt->rrt_flags & RTF_STATIC) == 0) { 1719 trace(1, "\tyou can delete static routes only\n"); 1720 } else if (memcmp(&rrt->rrt_gw, gw, sizeof(rrt->rrt_gw)) != 0) { 1721 trace(1, "\tgw mismatch: %s <-> ", 1722 inet6_n2p(&rrt->rrt_gw)); 1723 trace(1, "%s\n", inet6_n2p(gw)); 1724 } else { 1725 trace(1, "\troute found, age it\n"); 1726 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1727 rrt->rrt_t = t_lifetime; 1728 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 1729 } 1730 } 1731 return 0; 1732 } 1733 1734 /* 1735 * remove specified address from internal interface/routing table. 1736 */ 1737 int 1738 rt_deladdr(ifcp, sifa, smask) 1739 struct ifc *ifcp; 1740 const struct sockaddr_in6 *sifa; 1741 const struct sockaddr_in6 *smask; 1742 { 1743 const struct in6_addr *addr = NULL; 1744 int prefix; 1745 struct ifac *ifa = NULL; 1746 struct netinfo6 ni6; 1747 struct riprt *rrt = NULL; 1748 time_t t_lifetime; 1749 int updated = 0; 1750 1751 if (sifa->sin6_family != AF_INET6 || smask->sin6_family != AF_INET6) { 1752 trace(1, "\tother AF, ignored\n"); 1753 return -1; 1754 } 1755 addr = &sifa->sin6_addr; 1756 prefix = mask2len(&smask->sin6_addr, 16); 1757 1758 trace(1, "\tdeleting %s/%d from %s\n", 1759 inet6_n2p(addr), prefix, ifcp->ifc_name); 1760 ifa = ifa_match(ifcp, addr, prefix); 1761 if (!ifa) { 1762 trace(1, "\tno matching ifa found for %s/%d on %s\n", 1763 inet6_n2p(addr), prefix, ifcp->ifc_name); 1764 return -1; 1765 } 1766 if (ifa->ifa_conf != ifcp) { 1767 trace(1, "\taddress table corrupt: back pointer does not match " 1768 "(%s != %s)\n", 1769 ifcp->ifc_name, ifa->ifa_conf->ifc_name); 1770 return -1; 1771 } 1772 /* remove ifa from interface */ 1773 if (ifcp->ifc_addr == ifa) 1774 ifcp->ifc_addr = ifa->ifa_next; 1775 else { 1776 struct ifac *p; 1777 for (p = ifcp->ifc_addr; p; p = p->ifa_next) { 1778 if (p->ifa_next == ifa) { 1779 p->ifa_next = ifa->ifa_next; 1780 break; 1781 } 1782 } 1783 } 1784 ifa->ifa_next = NULL; 1785 ifa->ifa_conf = NULL; 1786 t_lifetime = time(NULL) - RIP_LIFETIME; 1787 /* age route for interface address */ 1788 memset(&ni6, 0, sizeof(ni6)); 1789 ni6.rip6_dest = ifa->ifa_addr; 1790 ni6.rip6_plen = ifa->ifa_plen; 1791 applyplen(&ni6.rip6_dest, ni6.rip6_plen); 1792 trace(1, "\tfind interface route %s/%d on %d\n", 1793 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index); 1794 if ((rrt = rtsearch(&ni6)) != NULL) { 1795 struct in6_addr none; 1796 memset(&none, 0, sizeof(none)); 1797 if (rrt->rrt_index == ifcp->ifc_index 1798 && memcmp(&rrt->rrt_gw, &none, sizeof(rrt->rrt_gw)) == 0) { 1799 trace(1, "\troute found, age it\n"); 1800 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1801 rrt->rrt_t = t_lifetime; 1802 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 1803 } 1804 updated++; 1805 } else { 1806 trace(1, "\tnon-interface route found: %s/%d on %d\n", 1807 inet6_n2p(&rrt->rrt_info.rip6_dest), 1808 rrt->rrt_info.rip6_plen, 1809 rrt->rrt_index); 1810 } 1811 } else 1812 trace(1, "\tno interface route found\n"); 1813 /* age route for p2p destination */ 1814 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1815 memset(&ni6, 0, sizeof(ni6)); 1816 ni6.rip6_dest = ifa->ifa_raddr; 1817 ni6.rip6_plen = 128; 1818 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 1819 trace(1, "\tfind p2p route %s/%d on %d\n", 1820 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, 1821 ifcp->ifc_index); 1822 if ((rrt = rtsearch(&ni6)) != NULL) { 1823 if (rrt->rrt_index == ifcp->ifc_index 1824 && memcmp(&rrt->rrt_gw, &ifa->ifa_addr, 1825 sizeof(rrt->rrt_gw)) == 0) { 1826 trace(1, "\troute found, age it\n"); 1827 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1828 rrt->rrt_t = t_lifetime; 1829 rrt->rrt_info.rip6_metric = 1830 HOPCNT_INFINITY6; 1831 updated++; 1832 } 1833 } else { 1834 trace(1, "\tnon-p2p route found: %s/%d on %d\n", 1835 inet6_n2p(&rrt->rrt_info.rip6_dest), 1836 rrt->rrt_info.rip6_plen, 1837 rrt->rrt_index); 1838 } 1839 } else 1840 trace(1, "\tno p2p route found\n"); 1841 } 1842 return updated ? 0 : -1; 1843 } 1844 1845 /* 1846 * Get each interface address and put those interface routes to the route 1847 * list. 1848 */ 1849 void 1850 ifrt(ifcp, again) 1851 struct ifc *ifcp; 1852 int again; 1853 { 1854 struct ifac *ifa; 1855 struct riprt *rrt; 1856 struct netinfo6 *np; 1857 1858 if (ifcp->ifc_flags & IFF_LOOPBACK) 1859 return; /* ignore loopback */ 1860 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1861 ifrt_p2p(ifcp, again); 1862 return; 1863 } 1864 1865 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 1866 if (IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) { 1867 #if 0 1868 trace(1, "route: %s on %s: " 1869 "skip linklocal interface address\n", 1870 inet6_n2p(&ifa->ifa_addr), ifcp->ifc_name); 1871 #endif 1872 continue; 1873 } 1874 if (IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_addr)) { 1875 #if 0 1876 trace(1, "route: %s: skip unspec interface address\n", 1877 ifcp->ifc_name); 1878 #endif 1879 continue; 1880 } 1881 if ((rrt = MALLOC(struct riprt)) == NULL) 1882 fatal("malloc: struct riprt"); 1883 memset(rrt, 0, sizeof(*rrt)); 1884 rrt->rrt_same = NULL; 1885 rrt->rrt_index = ifcp->ifc_index; 1886 rrt->rrt_t = 0; /* don't age */ 1887 rrt->rrt_info.rip6_dest = ifa->ifa_addr; 1888 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 1889 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; 1890 rrt->rrt_info.rip6_plen = ifa->ifa_plen; 1891 applyplen(&rrt->rrt_info.rip6_dest, ifa->ifa_plen); 1892 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 1893 np = &rrt->rrt_info; 1894 if (rtsearch(np) == NULL) { 1895 /* Attach the route to the list */ 1896 trace(1, "route: %s/%d: register route (%s)\n", 1897 inet6_n2p(&np->rip6_dest), np->rip6_plen, 1898 ifcp->ifc_name); 1899 rrt->rrt_next = riprt; 1900 riprt = rrt; 1901 } else { 1902 /* Already found */ 1903 if (!again) { 1904 trace(1, "route: %s/%d: " 1905 "already registered (%s)\n", 1906 inet6_n2p(&np->rip6_dest), np->rip6_plen, 1907 ifcp->ifc_name); 1908 } 1909 free(rrt); 1910 } 1911 } 1912 } 1913 1914 /* 1915 * there are couple of p2p interface routing models. "behavior" lets 1916 * you pick one. it looks that gated behavior fits best with BSDs, 1917 * since BSD kernels does not look at prefix length on p2p interfaces. 1918 */ 1919 void 1920 ifrt_p2p(ifcp, again) 1921 struct ifc *ifcp; 1922 int again; 1923 { 1924 struct ifac *ifa; 1925 struct riprt *rrt; 1926 struct netinfo6 *np; 1927 struct in6_addr addr, dest; 1928 int advert, ignore, i; 1929 #define P2PADVERT_NETWORK 1 1930 #define P2PADVERT_ADDR 2 1931 #define P2PADVERT_DEST 4 1932 #define P2PADVERT_MAX 4 1933 const enum { CISCO, GATED, ROUTE6D } behavior = GATED; 1934 const char *category; 1935 const char *noadv; 1936 1937 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 1938 addr = ifa->ifa_addr; 1939 dest = ifa->ifa_raddr; 1940 applyplen(&addr, ifa->ifa_plen); 1941 applyplen(&dest, ifa->ifa_plen); 1942 advert = ignore = 0; 1943 switch (behavior) { 1944 case CISCO: 1945 /* 1946 * honor addr/plen, just like normal shared medium 1947 * interface. this may cause trouble if you reuse 1948 * addr/plen on other interfaces. 1949 * 1950 * advertise addr/plen. 1951 */ 1952 advert |= P2PADVERT_NETWORK; 1953 break; 1954 case GATED: 1955 /* 1956 * prefixlen on p2p interface is meaningless. 1957 * advertise addr/128 and dest/128. 1958 * 1959 * do not install network route to route6d routing 1960 * table (if we do, it would prevent route installation 1961 * for other p2p interface that shares addr/plen). 1962 */ 1963 advert |= P2PADVERT_ADDR; 1964 advert |= P2PADVERT_DEST; 1965 ignore |= P2PADVERT_NETWORK; 1966 break; 1967 case ROUTE6D: 1968 /* 1969 * just for testing... 1970 */ 1971 if (IN6_ARE_ADDR_EQUAL(&addr, &dest)) 1972 advert |= P2PADVERT_NETWORK; 1973 else { 1974 advert |= P2PADVERT_ADDR; 1975 advert |= P2PADVERT_DEST; 1976 ignore |= P2PADVERT_NETWORK; 1977 } 1978 break; 1979 } 1980 1981 for (i = 1; i <= P2PADVERT_MAX; i *= 2) { 1982 if ((ignore & i) != 0) 1983 continue; 1984 if ((rrt = MALLOC(struct riprt)) == NULL) 1985 fatal("malloc: struct riprt"); 1986 memset(rrt, 0, sizeof(*rrt)); 1987 rrt->rrt_same = NULL; 1988 rrt->rrt_index = ifcp->ifc_index; 1989 rrt->rrt_t = 0; /* don't age */ 1990 switch (i) { 1991 case P2PADVERT_NETWORK: 1992 rrt->rrt_info.rip6_dest = ifa->ifa_addr; 1993 rrt->rrt_info.rip6_plen = ifa->ifa_plen; 1994 applyplen(&rrt->rrt_info.rip6_dest, 1995 ifa->ifa_plen); 1996 category = "network"; 1997 break; 1998 case P2PADVERT_ADDR: 1999 rrt->rrt_info.rip6_dest = ifa->ifa_addr; 2000 rrt->rrt_info.rip6_plen = 128; 2001 category = "addr"; 2002 break; 2003 case P2PADVERT_DEST: 2004 rrt->rrt_info.rip6_dest = ifa->ifa_raddr; 2005 rrt->rrt_info.rip6_plen = 128; 2006 category = "dest"; 2007 break; 2008 } 2009 if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest) || 2010 IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)) { 2011 #if 0 2012 trace(1, "route: %s: skip unspec/linklocal " 2013 "(%s on %s)\n", category, ifcp->ifc_name); 2014 #endif 2015 free(rrt); 2016 continue; 2017 } 2018 if ((advert & i) == 0) { 2019 rrt->rrt_rflags |= RRTF_NOADVERTISE; 2020 noadv = ", NO-ADV"; 2021 } else 2022 noadv = ""; 2023 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 2024 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; 2025 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2026 np = &rrt->rrt_info; 2027 if (rtsearch(np) == NULL) { 2028 /* Attach the route to the list */ 2029 trace(1, "route: %s/%d: register route " 2030 "(%s on %s%s)\n", 2031 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2032 category, ifcp->ifc_name, noadv); 2033 rrt->rrt_next = riprt; 2034 riprt = rrt; 2035 } else { 2036 /* Already found */ 2037 if (!again) { 2038 trace(1, "route: %s/%d: " 2039 "already registered (%s on %s%s)\n", 2040 inet6_n2p(&np->rip6_dest), 2041 np->rip6_plen, category, 2042 ifcp->ifc_name, noadv); 2043 } 2044 free(rrt); 2045 } 2046 } 2047 } 2048 #undef P2PADVERT_NETWORK 2049 #undef P2PADVERT_ADDR 2050 #undef P2PADVERT_DEST 2051 #undef P2PADVERT_MAX 2052 } 2053 2054 int 2055 getifmtu(ifindex) 2056 int ifindex; 2057 { 2058 int mib[6]; 2059 char *buf; 2060 size_t msize; 2061 struct if_msghdr *ifm; 2062 int mtu; 2063 2064 mib[0] = CTL_NET; 2065 mib[1] = PF_ROUTE; 2066 mib[2] = 0; 2067 mib[3] = AF_INET6; 2068 mib[4] = NET_RT_IFLIST; 2069 mib[5] = ifindex; 2070 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) 2071 fatal("sysctl estimate NET_RT_IFLIST"); 2072 if ((buf = malloc(msize)) == NULL) 2073 fatal("malloc"); 2074 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) 2075 fatal("sysctl NET_RT_IFLIST"); 2076 ifm = (struct if_msghdr *)buf; 2077 mtu = ifm->ifm_data.ifi_mtu; 2078 #ifdef __FREEBSD__ 2079 if (ifindex != ifm->ifm_index) 2080 fatal("ifindex does not match with ifm_index"); 2081 #endif /* __FREEBSD__ */ 2082 free(buf); 2083 return mtu; 2084 } 2085 2086 const char * 2087 rttypes(rtm) 2088 struct rt_msghdr *rtm; 2089 { 2090 #define RTTYPE(s, f) \ 2091 do { \ 2092 if (rtm->rtm_type == (f)) \ 2093 return (s); \ 2094 } while (0) 2095 RTTYPE("ADD", RTM_ADD); 2096 RTTYPE("DELETE", RTM_DELETE); 2097 RTTYPE("CHANGE", RTM_CHANGE); 2098 RTTYPE("GET", RTM_GET); 2099 RTTYPE("LOSING", RTM_LOSING); 2100 RTTYPE("REDIRECT", RTM_REDIRECT); 2101 RTTYPE("MISS", RTM_MISS); 2102 RTTYPE("LOCK", RTM_LOCK); 2103 RTTYPE("OLDADD", RTM_OLDADD); 2104 RTTYPE("OLDDEL", RTM_OLDDEL); 2105 RTTYPE("RESOLVE", RTM_RESOLVE); 2106 RTTYPE("NEWADDR", RTM_NEWADDR); 2107 RTTYPE("DELADDR", RTM_DELADDR); 2108 RTTYPE("IFINFO", RTM_IFINFO); 2109 #undef RTTYPE 2110 return NULL; 2111 } 2112 2113 const char * 2114 rtflags(rtm) 2115 struct rt_msghdr *rtm; 2116 { 2117 static char buf[BUFSIZ]; 2118 2119 strcpy(buf, ""); 2120 #define RTFLAG(s, f) \ 2121 do { \ 2122 if (rtm->rtm_flags & (f)) \ 2123 strcat(buf, (s)); \ 2124 } while (0) 2125 RTFLAG("U", RTF_UP); 2126 RTFLAG("G", RTF_GATEWAY); 2127 RTFLAG("H", RTF_HOST); 2128 RTFLAG("R", RTF_REJECT); 2129 RTFLAG("D", RTF_DYNAMIC); 2130 RTFLAG("M", RTF_MODIFIED); 2131 RTFLAG("d", RTF_DONE); 2132 #ifdef RTF_MASK 2133 RTFLAG("m", RTF_MASK); 2134 #endif 2135 RTFLAG("C", RTF_CLONING); 2136 RTFLAG("X", RTF_XRESOLVE); 2137 RTFLAG("L", RTF_LLINFO); 2138 RTFLAG("S", RTF_STATIC); 2139 RTFLAG("B", RTF_BLACKHOLE); 2140 RTFLAG("2", RTF_PROTO2); 2141 RTFLAG("1", RTF_PROTO1); 2142 #undef RTFLAG 2143 return buf; 2144 } 2145 2146 const char * 2147 ifflags(flags) 2148 int flags; 2149 { 2150 static char buf[BUFSIZ]; 2151 2152 strcpy(buf, ""); 2153 #define IFFLAG(s, f) \ 2154 do { \ 2155 if (flags & f) { \ 2156 if (buf[0]) \ 2157 strcat(buf, ","); \ 2158 strcat(buf, s); \ 2159 } \ 2160 } while (0) 2161 IFFLAG("UP", IFF_UP); 2162 IFFLAG("BROADCAST", IFF_BROADCAST); 2163 IFFLAG("DEBUG", IFF_DEBUG); 2164 IFFLAG("LOOPBACK", IFF_LOOPBACK); 2165 IFFLAG("POINTOPOINT", IFF_POINTOPOINT); 2166 #ifdef IFF_NOTRAILERS 2167 IFFLAG("NOTRAILERS", IFF_NOTRAILERS); 2168 #endif 2169 IFFLAG("RUNNING", IFF_RUNNING); 2170 IFFLAG("NOARP", IFF_NOARP); 2171 IFFLAG("PROMISC", IFF_PROMISC); 2172 IFFLAG("ALLMULTI", IFF_ALLMULTI); 2173 IFFLAG("OACTIVE", IFF_OACTIVE); 2174 IFFLAG("SIMPLEX", IFF_SIMPLEX); 2175 IFFLAG("LINK0", IFF_LINK0); 2176 IFFLAG("LINK1", IFF_LINK1); 2177 IFFLAG("LINK2", IFF_LINK2); 2178 IFFLAG("MULTICAST", IFF_MULTICAST); 2179 #undef IFFLAG 2180 return buf; 2181 } 2182 2183 void 2184 krtread(again) 2185 int again; 2186 { 2187 int mib[6]; 2188 size_t msize; 2189 char *buf, *p, *lim; 2190 struct rt_msghdr *rtm; 2191 int retry; 2192 const char *errmsg; 2193 2194 retry = 0; 2195 buf = NULL; 2196 mib[0] = CTL_NET; 2197 mib[1] = PF_ROUTE; 2198 mib[2] = 0; 2199 mib[3] = AF_INET6; /* Address family */ 2200 mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */ 2201 mib[5] = 0; /* No flags */ 2202 do { 2203 retry++; 2204 errmsg = NULL; 2205 if (buf) 2206 free(buf); 2207 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) { 2208 errmsg = "sysctl estimate"; 2209 continue; 2210 } 2211 if ((buf = malloc(msize)) == NULL) { 2212 errmsg = "malloc"; 2213 continue; 2214 } 2215 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) { 2216 errmsg = "sysctl NET_RT_DUMP"; 2217 continue; 2218 } 2219 } while (retry < 5 && errmsg != NULL); 2220 if (errmsg) 2221 fatal("%s (with %d retries, msize=%d)", errmsg, retry, msize); 2222 else if (1 < retry) 2223 syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry); 2224 2225 lim = buf + msize; 2226 for (p = buf; p < lim; p += rtm->rtm_msglen) { 2227 rtm = (struct rt_msghdr *)p; 2228 rt_entry(rtm, again); 2229 } 2230 free(buf); 2231 } 2232 2233 void 2234 rt_entry(rtm, again) 2235 struct rt_msghdr *rtm; 2236 int again; 2237 { 2238 struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask; 2239 struct sockaddr_in6 *sin6_genmask, *sin6_ifp; 2240 char *rtmp, *ifname = NULL; 2241 struct riprt *rrt; 2242 struct netinfo6 *np; 2243 int s; 2244 2245 sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = 0; 2246 if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags & 2247 (RTF_CLONING|RTF_XRESOLVE|RTF_LLINFO|RTF_BLACKHOLE)) { 2248 return; /* not interested in the link route */ 2249 } 2250 rtmp = (char *)(rtm + 1); 2251 /* Destination */ 2252 if ((rtm->rtm_addrs & RTA_DST) == 0) 2253 return; /* ignore routes without destination address */ 2254 sin6_dst = (struct sockaddr_in6 *)rtmp; 2255 rtmp += sin6_dst->sin6_len; 2256 if (rtm->rtm_addrs & RTA_GATEWAY) { 2257 sin6_gw = (struct sockaddr_in6 *)rtmp; 2258 rtmp += ROUNDUP(sin6_gw->sin6_len); 2259 } 2260 if (rtm->rtm_addrs & RTA_NETMASK) { 2261 sin6_mask = (struct sockaddr_in6 *)rtmp; 2262 rtmp += ROUNDUP(sin6_mask->sin6_len); 2263 } 2264 if (rtm->rtm_addrs & RTA_GENMASK) { 2265 sin6_genmask = (struct sockaddr_in6 *)rtmp; 2266 rtmp += ROUNDUP(sin6_genmask->sin6_len); 2267 } 2268 if (rtm->rtm_addrs & RTA_IFP) { 2269 sin6_ifp = (struct sockaddr_in6 *)rtmp; 2270 rtmp += ROUNDUP(sin6_ifp->sin6_len); 2271 } 2272 2273 /* Destination */ 2274 if (sin6_dst->sin6_family != AF_INET6) 2275 return; 2276 if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr)) 2277 return; /* Link-local */ 2278 if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback)) 2279 return; /* Loopback */ 2280 if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr)) 2281 return; 2282 2283 if ((rrt = MALLOC(struct riprt)) == NULL) 2284 fatal("malloc: struct riprt"); 2285 memset(rrt, 0, sizeof(*rrt)); 2286 np = &rrt->rrt_info; 2287 rrt->rrt_same = NULL; 2288 rrt->rrt_t = time(NULL); 2289 if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC)) 2290 rrt->rrt_t = 0; /* Don't age static routes */ 2291 #if 0 2292 np->rip6_tag = htons(routetag & 0xffff); 2293 #else 2294 np->rip6_tag = 0; 2295 #endif 2296 np->rip6_metric = rtm->rtm_rmx.rmx_hopcount; 2297 if (np->rip6_metric < 1) 2298 np->rip6_metric = 1; 2299 rrt->rrt_flags = rtm->rtm_flags; 2300 np->rip6_dest = sin6_dst->sin6_addr; 2301 2302 /* Mask or plen */ 2303 if (rtm->rtm_flags & RTF_HOST) 2304 np->rip6_plen = 128; /* Host route */ 2305 else if (sin6_mask) { 2306 np->rip6_plen = mask2len(&sin6_mask->sin6_addr, 2307 sin6_mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr)); 2308 } else 2309 np->rip6_plen = 0; 2310 2311 if (rtsearch(np)) { 2312 /* Already found */ 2313 if (!again) { 2314 trace(1, "route: %s/%d flags %s: already registered\n", 2315 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2316 rtflags(rtm)); 2317 } 2318 free(rrt); 2319 return; 2320 } 2321 /* Gateway */ 2322 if (!sin6_gw) 2323 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2324 else { 2325 if (sin6_gw->sin6_family == AF_INET6) 2326 rrt->rrt_gw = sin6_gw->sin6_addr; 2327 else if (sin6_gw->sin6_family == AF_LINK) { 2328 /* XXX in case ppp link? */ 2329 rrt->rrt_gw = in6addr_loopback; 2330 } else 2331 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2332 } 2333 trace(1, "route: %s/%d flags %s", 2334 inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm)); 2335 trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw)); 2336 2337 /* Interface */ 2338 s = rtm->rtm_index; 2339 if (s < nindex2ifc && index2ifc[s]) 2340 ifname = index2ifc[s]->ifc_name; 2341 else { 2342 trace(1, " not configured\n"); 2343 free(rrt); 2344 return; 2345 } 2346 trace(1, " if %s sock %d", ifname, s); 2347 rrt->rrt_index = s; 2348 2349 trace(1, "\n"); 2350 2351 /* Check gateway */ 2352 if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) && 2353 !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw) 2354 #ifdef __FreeBSD__ 2355 && (rrt->rrt_flags & RTF_LOCAL) == 0 2356 #endif 2357 ) { 2358 trace(0, "***** Gateway %s is not a link-local address.\n", 2359 inet6_n2p(&rrt->rrt_gw)); 2360 trace(0, "***** dest(%s) if(%s) -- Not optimized.\n", 2361 inet6_n2p(&rrt->rrt_info.rip6_dest), ifname); 2362 rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR; 2363 } 2364 2365 /* Put it to the route list */ 2366 rrt->rrt_next = riprt; 2367 riprt = rrt; 2368 } 2369 2370 int 2371 addroute(rrt, gw, ifcp) 2372 struct riprt *rrt; 2373 const struct in6_addr *gw; 2374 struct ifc *ifcp; 2375 { 2376 struct netinfo6 *np; 2377 u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ]; 2378 struct rt_msghdr *rtm; 2379 struct sockaddr_in6 *sin; 2380 int len; 2381 2382 np = &rrt->rrt_info; 2383 inet_ntop(AF_INET6, (void *)gw, (char *)buf1, sizeof(buf1)); 2384 inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2)); 2385 tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n", 2386 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 2387 np->rip6_metric - 1, buf2); 2388 if (rtlog) 2389 fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(), 2390 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 2391 np->rip6_metric - 1, buf2); 2392 if (nflag) 2393 return 0; 2394 2395 memset(buf, 0, sizeof(buf)); 2396 rtm = (struct rt_msghdr *)buf; 2397 rtm->rtm_type = RTM_ADD; 2398 rtm->rtm_version = RTM_VERSION; 2399 rtm->rtm_seq = ++seq; 2400 rtm->rtm_pid = pid; 2401 rtm->rtm_flags = rrt->rrt_flags; 2402 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 2403 rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1; 2404 rtm->rtm_inits = RTV_HOPCOUNT; 2405 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2406 /* Destination */ 2407 sin->sin6_len = sizeof(struct sockaddr_in6); 2408 sin->sin6_family = AF_INET6; 2409 sin->sin6_addr = np->rip6_dest; 2410 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2411 /* Gateway */ 2412 sin->sin6_len = sizeof(struct sockaddr_in6); 2413 sin->sin6_family = AF_INET6; 2414 sin->sin6_addr = *gw; 2415 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2416 /* Netmask */ 2417 sin->sin6_len = sizeof(struct sockaddr_in6); 2418 sin->sin6_family = AF_INET6; 2419 sin->sin6_addr = *(plen2mask(np->rip6_plen)); 2420 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2421 2422 len = (char *)sin - (char *)buf; 2423 rtm->rtm_msglen = len; 2424 if (write(rtsock, buf, len) > 0) 2425 return 0; 2426 2427 if (errno == EEXIST) { 2428 trace(0, "ADD: Route already exists %s/%d gw %s\n", 2429 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 2430 if (rtlog) 2431 fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n", 2432 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 2433 } else { 2434 trace(0, "Can not write to rtsock (addroute): %s\n", 2435 strerror(errno)); 2436 if (rtlog) 2437 fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2438 strerror(errno)); 2439 } 2440 return -1; 2441 } 2442 2443 int 2444 delroute(np, gw) 2445 struct netinfo6 *np; 2446 struct in6_addr *gw; 2447 { 2448 u_char buf[BUFSIZ], buf2[BUFSIZ]; 2449 struct rt_msghdr *rtm; 2450 struct sockaddr_in6 *sin; 2451 int len; 2452 2453 inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2)); 2454 tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest), 2455 np->rip6_plen, buf2); 2456 if (rtlog) 2457 fprintf(rtlog, "%s: DEL: %s/%d gw %s\n", 2458 hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2459 if (nflag) 2460 return 0; 2461 2462 memset(buf, 0, sizeof(buf)); 2463 rtm = (struct rt_msghdr *)buf; 2464 rtm->rtm_type = RTM_DELETE; 2465 rtm->rtm_version = RTM_VERSION; 2466 rtm->rtm_seq = ++seq; 2467 rtm->rtm_pid = pid; 2468 rtm->rtm_flags = RTF_UP | RTF_GATEWAY; 2469 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 2470 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2471 /* Destination */ 2472 sin->sin6_len = sizeof(struct sockaddr_in6); 2473 sin->sin6_family = AF_INET6; 2474 sin->sin6_addr = np->rip6_dest; 2475 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2476 /* Gateway */ 2477 sin->sin6_len = sizeof(struct sockaddr_in6); 2478 sin->sin6_family = AF_INET6; 2479 sin->sin6_addr = *gw; 2480 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2481 /* Netmask */ 2482 sin->sin6_len = sizeof(struct sockaddr_in6); 2483 sin->sin6_family = AF_INET6; 2484 sin->sin6_addr = *(plen2mask(np->rip6_plen)); 2485 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2486 2487 len = (char *)sin - (char *)buf; 2488 rtm->rtm_msglen = len; 2489 if (write(rtsock, buf, len) >= 0) 2490 return 0; 2491 2492 if (errno == ESRCH) { 2493 trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n", 2494 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2495 if (rtlog) 2496 fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n", 2497 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2498 } else { 2499 trace(0, "Can not write to rtsock (delroute): %s\n", 2500 strerror(errno)); 2501 if (rtlog) 2502 fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2503 strerror(errno)); 2504 } 2505 return -1; 2506 } 2507 2508 struct in6_addr * 2509 getroute(np, gw) 2510 struct netinfo6 *np; 2511 struct in6_addr *gw; 2512 { 2513 u_char buf[BUFSIZ]; 2514 u_long myseq; 2515 int len; 2516 struct rt_msghdr *rtm; 2517 struct sockaddr_in6 *sin; 2518 2519 rtm = (struct rt_msghdr *)buf; 2520 len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6); 2521 memset(rtm, 0, len); 2522 rtm->rtm_type = RTM_GET; 2523 rtm->rtm_version = RTM_VERSION; 2524 myseq = ++seq; 2525 rtm->rtm_seq = myseq; 2526 rtm->rtm_addrs = RTA_DST; 2527 rtm->rtm_msglen = len; 2528 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2529 sin->sin6_len = sizeof(struct sockaddr_in6); 2530 sin->sin6_family = AF_INET6; 2531 sin->sin6_addr = np->rip6_dest; 2532 if (write(rtsock, buf, len) < 0) { 2533 if (errno == ESRCH) /* No such route found */ 2534 return NULL; 2535 perror("write to rtsock"); 2536 exit(-1); 2537 } 2538 do { 2539 if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 2540 perror("read from rtsock"); 2541 exit(-1); 2542 } 2543 rtm = (struct rt_msghdr *)buf; 2544 } while (rtm->rtm_seq != myseq || rtm->rtm_pid != pid); 2545 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2546 if (rtm->rtm_addrs & RTA_DST) { 2547 sin = (struct sockaddr_in6 *) 2548 ((char *)sin + ROUNDUP(sin->sin6_len)); 2549 } 2550 if (rtm->rtm_addrs & RTA_GATEWAY) { 2551 *gw = sin->sin6_addr; 2552 return gw; 2553 } 2554 return NULL; 2555 } 2556 2557 const char * 2558 inet6_n2p(p) 2559 const struct in6_addr *p; 2560 { 2561 static char buf[BUFSIZ]; 2562 2563 return inet_ntop(AF_INET6, (void *)p, buf, sizeof(buf)); 2564 } 2565 2566 void 2567 ifrtdump(sig) 2568 int sig; 2569 { 2570 2571 ifdump(sig); 2572 rtdump(sig); 2573 } 2574 2575 void 2576 ifdump(sig) 2577 int sig; 2578 { 2579 struct ifc *ifcp; 2580 FILE *dump; 2581 int i; 2582 2583 if (sig == 0) 2584 dump = stderr; 2585 else 2586 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 2587 dump = stderr; 2588 2589 fprintf(dump, "%s: Interface Table Dump\n", hms()); 2590 fprintf(dump, " Number of interfaces: %d\n", nifc); 2591 for (i = 0; i < 2; i++) { 2592 fprintf(dump, " %sadvertising interfaces:\n", i ? "non-" : ""); 2593 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 2594 if (i == 0) { 2595 if ((ifcp->ifc_flags & IFF_UP) == 0) 2596 continue; 2597 if (iff_find(ifcp, 'N') != NULL) 2598 continue; 2599 } else { 2600 if (ifcp->ifc_flags & IFF_UP) 2601 continue; 2602 } 2603 ifdump0(dump, ifcp); 2604 } 2605 } 2606 fprintf(dump, "\n"); 2607 if (dump != stderr) 2608 fclose(dump); 2609 } 2610 2611 void 2612 ifdump0(dump, ifcp) 2613 FILE *dump; 2614 const struct ifc *ifcp; 2615 { 2616 struct ifac *ifa; 2617 struct iff *iffp; 2618 char buf[BUFSIZ]; 2619 const char *ft; 2620 int addr; 2621 2622 fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n", 2623 ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags), 2624 inet6_n2p(&ifcp->ifc_mylladdr), 2625 ifcp->ifc_mtu, ifcp->ifc_metric); 2626 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 2627 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 2628 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, 2629 buf, sizeof(buf)); 2630 fprintf(dump, "\t%s/%d -- %s\n", 2631 inet6_n2p(&ifa->ifa_addr), 2632 ifa->ifa_plen, buf); 2633 } else { 2634 fprintf(dump, "\t%s/%d\n", 2635 inet6_n2p(&ifa->ifa_addr), 2636 ifa->ifa_plen); 2637 } 2638 } 2639 if (ifcp->ifc_filter) { 2640 fprintf(dump, "\tFilter:"); 2641 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 2642 addr = 0; 2643 switch (iffp->iff_type) { 2644 case 'A': 2645 ft = "Aggregate"; addr++; break; 2646 case 'N': 2647 ft = "No-advertise"; break; 2648 case 'O': 2649 ft = "Advertise-only"; addr++; break; 2650 case 'T': 2651 ft = "Default-only"; break; 2652 case 'L': 2653 ft = "Listen-only"; addr++; break; 2654 default: 2655 snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type); 2656 ft = buf; 2657 addr++; 2658 break; 2659 } 2660 fprintf(dump, " %s", ft); 2661 if (addr) { 2662 fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr), 2663 iffp->iff_plen); 2664 } 2665 } 2666 fprintf(dump, "\n"); 2667 } 2668 } 2669 2670 void 2671 rtdump(sig) 2672 int sig; 2673 { 2674 struct riprt *rrt; 2675 char buf[BUFSIZ]; 2676 FILE *dump; 2677 time_t t, age; 2678 2679 if (sig == 0) 2680 dump = stderr; 2681 else 2682 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 2683 dump = stderr; 2684 2685 t = time(NULL); 2686 fprintf(dump, "\n%s: Routing Table Dump\n", hms()); 2687 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 2688 if (rrt->rrt_t == 0) 2689 age = 0; 2690 else 2691 age = t - rrt->rrt_t; 2692 inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest, 2693 buf, sizeof(buf)); 2694 fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)", 2695 buf, rrt->rrt_info.rip6_plen, rrt->rrt_index, 2696 index2ifc[rrt->rrt_index]->ifc_name, 2697 inet6_n2p(&rrt->rrt_gw), 2698 rrt->rrt_info.rip6_metric, (long)age); 2699 if (rrt->rrt_info.rip6_tag) { 2700 fprintf(dump, " tag(0x%04x)", 2701 ntohs(rrt->rrt_info.rip6_tag) & 0xffff); 2702 } 2703 if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) 2704 fprintf(dump, " NOT-LL"); 2705 if (rrt->rrt_rflags & RRTF_NOADVERTISE) 2706 fprintf(dump, " NO-ADV"); 2707 fprintf(dump, "\n"); 2708 } 2709 fprintf(dump, "\n"); 2710 if (dump != stderr) 2711 fclose(dump); 2712 } 2713 2714 /* 2715 * Parse the -A (and -O) options and put corresponding filter object to the 2716 * specified interface structures. Each of the -A/O option has the following 2717 * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate) 2718 * -O 5f09:c400::/32,ef0,ef1 (only when match) 2719 */ 2720 void 2721 filterconfig() 2722 { 2723 int i; 2724 char *p, *ap, *iflp, *ifname; 2725 struct iff ftmp, *iff_obj; 2726 struct ifc *ifcp; 2727 struct riprt *rrt; 2728 struct in6_addr gw; 2729 2730 for (i = 0; i < nfilter; i++) { 2731 ap = filter[i]; 2732 iflp = NULL; 2733 ifcp = NULL; 2734 if (filtertype[i] == 'N' || filtertype[i] == 'T') { 2735 iflp = ap; 2736 goto ifonly; 2737 } 2738 if ((p = index(ap, ',')) != NULL) { 2739 *p++ = '\0'; 2740 iflp = p; 2741 } 2742 if ((p = index(ap, '/')) == NULL) 2743 fatal("no prefixlen specified for '%s'", ap); 2744 *p++ = '\0'; 2745 if (inet_pton(AF_INET6, ap, &ftmp.iff_addr) != 1) 2746 fatal("invalid prefix specified for '%s'", ap); 2747 ftmp.iff_plen = atoi(p); 2748 ftmp.iff_next = NULL; 2749 applyplen(&ftmp.iff_addr, ftmp.iff_plen); 2750 ifonly: 2751 ftmp.iff_type = filtertype[i]; 2752 if (iflp == NULL || *iflp == '\0') 2753 fatal("no interface specified for '%s'", ap); 2754 /* parse the interface listing portion */ 2755 while (iflp) { 2756 ifname = iflp; 2757 if ((iflp = index(iflp, ',')) != NULL) 2758 *iflp++ = '\0'; 2759 ifcp = ifc_find(ifname); 2760 if (ifcp == NULL) 2761 fatal("no interface %s exists", ifname); 2762 iff_obj = (struct iff *)malloc(sizeof(struct iff)); 2763 if (iff_obj == NULL) 2764 fatal("malloc of iff_obj"); 2765 memcpy((void *)iff_obj, (void *)&ftmp, 2766 sizeof(struct iff)); 2767 /* link it to the interface filter */ 2768 iff_obj->iff_next = ifcp->ifc_filter; 2769 ifcp->ifc_filter = iff_obj; 2770 } 2771 if (filtertype[i] != 'A') 2772 continue; 2773 /* put the aggregate to the kernel routing table */ 2774 rrt = (struct riprt *)malloc(sizeof(struct riprt)); 2775 if (rrt == NULL) 2776 fatal("malloc: rrt"); 2777 memset(rrt, 0, sizeof(struct riprt)); 2778 rrt->rrt_info.rip6_dest = ftmp.iff_addr; 2779 rrt->rrt_info.rip6_plen = ftmp.iff_plen; 2780 rrt->rrt_info.rip6_metric = 1; 2781 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 2782 rrt->rrt_gw = in6addr_loopback; 2783 rrt->rrt_flags = RTF_UP | RTF_REJECT; 2784 rrt->rrt_rflags = RRTF_AGGREGATE; 2785 rrt->rrt_t = 0; 2786 rrt->rrt_index = loopifindex; 2787 if (getroute(&rrt->rrt_info, &gw)) { 2788 #if 0 2789 /* 2790 * When the address has already been registered in the 2791 * kernel routing table, it should be removed 2792 */ 2793 delroute(&rrt->rrt_info, &gw); 2794 #else 2795 /* it is more safe behavior */ 2796 errno = EINVAL; 2797 fatal("%s/%u already in routing table, " 2798 "cannot aggregate", 2799 inet6_n2p(&rrt->rrt_info.rip6_dest), 2800 rrt->rrt_info.rip6_plen); 2801 #endif 2802 } 2803 /* Put the route to the list */ 2804 rrt->rrt_next = riprt; 2805 riprt = rrt; 2806 trace(1, "Aggregate: %s/%d for %s\n", 2807 inet6_n2p(&ftmp.iff_addr), ftmp.iff_plen, 2808 ifcp->ifc_name); 2809 /* Add this route to the kernel */ 2810 if (nflag) /* do not modify kernel routing table */ 2811 continue; 2812 addroute(rrt, &in6addr_loopback, loopifcp); 2813 } 2814 } 2815 2816 /***************** utility functions *****************/ 2817 2818 /* 2819 * Returns a pointer to ifac whose address and prefix length matches 2820 * with the address and prefix length specified in the arguments. 2821 */ 2822 struct ifac * 2823 ifa_match(ifcp, ia, plen) 2824 const struct ifc *ifcp; 2825 const struct in6_addr *ia; 2826 int plen; 2827 { 2828 struct ifac *ifa; 2829 2830 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 2831 if (IN6_ARE_ADDR_EQUAL(&ifa->ifa_addr, ia) && 2832 ifa->ifa_plen == plen) 2833 break; 2834 } 2835 return ifa; 2836 } 2837 2838 /* 2839 * Return a pointer to riprt structure whose address and prefix length 2840 * matches with the address and prefix length found in the argument. 2841 * Note: This is not a rtalloc(). Therefore exact match is necessary. 2842 */ 2843 2844 struct riprt * 2845 rtsearch(np) 2846 struct netinfo6 *np; 2847 { 2848 struct riprt *rrt; 2849 2850 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 2851 if (rrt->rrt_info.rip6_plen == np->rip6_plen && 2852 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 2853 &np->rip6_dest)) 2854 return rrt; 2855 } 2856 return 0; 2857 } 2858 2859 int 2860 mask2len(addr, lenlim) 2861 const struct in6_addr *addr; 2862 int lenlim; 2863 { 2864 int i = 0, j; 2865 u_char *p = (u_char *)addr; 2866 2867 for (j = 0; j < lenlim; j++, p++) { 2868 if (*p != 0xff) 2869 break; 2870 i += 8; 2871 } 2872 if (j < lenlim) { 2873 switch (*p) { 2874 #define MASKLEN(m, l) case m: do { i += l; break; } while (0) 2875 MASKLEN(0xfe, 7); break; 2876 MASKLEN(0xfc, 6); break; 2877 MASKLEN(0xf8, 5); break; 2878 MASKLEN(0xf0, 4); break; 2879 MASKLEN(0xe0, 3); break; 2880 MASKLEN(0xc0, 2); break; 2881 MASKLEN(0x80, 1); break; 2882 #undef MASKLEN 2883 } 2884 } 2885 return i; 2886 } 2887 2888 void 2889 applymask(addr, mask) 2890 struct in6_addr *addr, *mask; 2891 { 2892 int i; 2893 u_long *p, *q; 2894 2895 p = (u_long *)addr; q = (u_long *)mask; 2896 for (i = 0; i < 4; i++) 2897 *p++ &= *q++; 2898 } 2899 2900 static const u_char plent[8] = { 2901 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe 2902 }; 2903 2904 void 2905 applyplen(ia, plen) 2906 struct in6_addr *ia; 2907 int plen; 2908 { 2909 u_char *p; 2910 int i; 2911 2912 p = ia->s6_addr; 2913 for (i = 0; i < 16; i++) { 2914 if (plen <= 0) 2915 *p = 0; 2916 else if (plen < 8) 2917 *p &= plent[plen]; 2918 p++, plen -= 8; 2919 } 2920 } 2921 2922 static const int pl2m[9] = { 2923 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff 2924 }; 2925 2926 struct in6_addr * 2927 plen2mask(n) 2928 int n; 2929 { 2930 static struct in6_addr ia; 2931 u_char *p; 2932 int i; 2933 2934 memset(&ia, 0, sizeof(struct in6_addr)); 2935 p = (u_char *)&ia; 2936 for (i = 0; i < 16; i++, p++, n -= 8) { 2937 if (n >= 8) { 2938 *p = 0xff; 2939 continue; 2940 } 2941 *p = pl2m[n]; 2942 break; 2943 } 2944 return &ia; 2945 } 2946 2947 char * 2948 allocopy(p) 2949 char *p; 2950 { 2951 char *q = (char *)malloc(strlen(p) + 1); 2952 2953 strcpy(q, p); 2954 return q; 2955 } 2956 2957 char * 2958 hms() 2959 { 2960 static char buf[BUFSIZ]; 2961 time_t t; 2962 struct tm *tm; 2963 2964 t = time(NULL); 2965 if ((tm = localtime(&t)) == 0) 2966 fatal("localtime"); 2967 snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec); 2968 return buf; 2969 } 2970 2971 #define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */ 2972 2973 int 2974 ripinterval(timer) 2975 int timer; 2976 { 2977 double r = rand(); 2978 2979 interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5)); 2980 nextalarm = time(NULL) + interval; 2981 return interval; 2982 } 2983 2984 time_t 2985 ripsuptrig() 2986 { 2987 time_t t; 2988 2989 double r = rand(); 2990 t = (int)(RIP_TRIG_INT6_MIN + 2991 (RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX )); 2992 sup_trig_update = time(NULL) + t; 2993 return t; 2994 } 2995 2996 void 2997 #ifdef __STDC__ 2998 fatal(const char *fmt, ...) 2999 #else 3000 fatal(fmt, va_alist) 3001 char *fmt; 3002 va_dcl 3003 #endif 3004 { 3005 va_list ap; 3006 char buf[1024]; 3007 3008 #ifdef __STDC__ 3009 va_start(ap, fmt); 3010 #else 3011 va_start(ap); 3012 #endif 3013 vsnprintf(buf, sizeof(buf), fmt, ap); 3014 perror(buf); 3015 syslog(LOG_ERR, "%s: %s", buf, strerror(errno)); 3016 rtdexit(0); 3017 va_end(ap); 3018 } 3019 3020 void 3021 #ifdef __STDC__ 3022 tracet(int level, const char *fmt, ...) 3023 #else 3024 tracet(level, fmt, va_alist) 3025 int level; 3026 char *fmt; 3027 va_dcl 3028 #endif 3029 { 3030 va_list ap; 3031 3032 #ifdef __STDC__ 3033 va_start(ap, fmt); 3034 #else 3035 va_start(ap); 3036 #endif 3037 if (level <= dflag) { 3038 fprintf(stderr, "%s: ", hms()); 3039 vfprintf(stderr, fmt, ap); 3040 } 3041 if (dflag) { 3042 if (level > 0) 3043 vsyslog(LOG_DEBUG, fmt, ap); 3044 else 3045 vsyslog(LOG_WARNING, fmt, ap); 3046 } 3047 va_end(ap); 3048 } 3049 3050 void 3051 #ifdef __STDC__ 3052 trace(int level, const char *fmt, ...) 3053 #else 3054 trace(level, fmt, va_alist) 3055 int level; 3056 char *fmt; 3057 va_dcl 3058 #endif 3059 { 3060 va_list ap; 3061 3062 #ifdef __STDC__ 3063 va_start(ap, fmt); 3064 #else 3065 va_start(ap); 3066 #endif 3067 if (level <= dflag) 3068 vfprintf(stderr, fmt, ap); 3069 if (dflag) { 3070 if (level > 0) 3071 vsyslog(LOG_DEBUG, fmt, ap); 3072 else 3073 vsyslog(LOG_WARNING, fmt, ap); 3074 } 3075 va_end(ap); 3076 } 3077 3078 unsigned int 3079 if_maxindex() 3080 { 3081 struct if_nameindex *p, *p0; 3082 unsigned int max = 0; 3083 3084 p0 = if_nameindex(); 3085 for (p = p0; p && p->if_index && p->if_name; p++) { 3086 if (max < p->if_index) 3087 max = p->if_index; 3088 } 3089 if_freenameindex(p0); 3090 return max; 3091 } 3092 3093 struct ifc * 3094 ifc_find(name) 3095 char *name; 3096 { 3097 struct ifc *ifcp; 3098 3099 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 3100 if (strcmp(name, ifcp->ifc_name) == 0) 3101 return ifcp; 3102 } 3103 return (struct ifc *)NULL; 3104 } 3105 3106 struct iff * 3107 iff_find(ifcp, type) 3108 struct ifc *ifcp; 3109 int type; 3110 { 3111 struct iff *iffp; 3112 3113 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 3114 if (iffp->iff_type == type) 3115 return iffp; 3116 } 3117 return NULL; 3118 } 3119 3120 void 3121 setindex2ifc(index, ifcp) 3122 int index; 3123 struct ifc *ifcp; 3124 { 3125 int n; 3126 struct ifc **p; 3127 3128 if (!index2ifc) { 3129 nindex2ifc = 5; /*initial guess*/ 3130 index2ifc = (struct ifc **) 3131 malloc(sizeof(*index2ifc) * nindex2ifc); 3132 if (index2ifc == NULL) 3133 fatal("malloc"); 3134 memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc); 3135 } 3136 n = nindex2ifc; 3137 while (nindex2ifc <= index) 3138 nindex2ifc *= 2; 3139 if (n != nindex2ifc) { 3140 p = (struct ifc **)realloc(index2ifc, 3141 sizeof(*index2ifc) * nindex2ifc); 3142 if (p == NULL) 3143 fatal("realloc"); 3144 index2ifc = p; 3145 } 3146 index2ifc[index] = ifcp; 3147 } 3148
Indexes created Wed Oct 22 06:10:02 GMT 2025