route6d.c revision 58070
1/* 2 * $Header: /cvsroot/kame/kame/kame/kame/route6d/route6d.c,v 1.6 1999/09/10 08:20:59 itojun Exp $ 3 */ 4 5/* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: head/usr.sbin/route6d/route6d.c 58070 2000-03-14 18:17:55Z shin $ 34 */ 35 36#ifndef lint 37static char _rcsid[] = "$Id: route6d.c,v 1.6 1999/09/10 08:20:59 itojun Exp $"; 38#endif 39 40#include <stdio.h> 41 42#include <time.h> 43#include <unistd.h> 44#include <stdlib.h> 45#include <string.h> 46#include <signal.h> 47#ifdef __STDC__ 48#include <stdarg.h> 49#else 50#include <varargs.h> 51#endif 52#include <syslog.h> 53#include <stddef.h> 54#include <err.h> 55 56#include <sys/types.h> 57#include <sys/param.h> 58#include <sys/file.h> 59#include <sys/socket.h> 60#include <sys/ioctl.h> 61#include <sys/sysctl.h> 62#include <sys/errno.h> 63#include <sys/uio.h> 64#include <net/if.h> 65#include <net/if_var.h> 66#include <net/route.h> 67#include <netinet/in.h> 68#include <netinet/in_var.h> 69#include <netinet/ip6.h> 70#include <netinet/udp.h> 71#include <netdb.h> 72 73#include <arpa/inet.h> 74 75#include "route6d.h" 76 77#define MAXFILTER 40 78 79#ifdef DEBUG 80#define INIT_INTERVAL6 6 81#else 82#define INIT_INTERVAL6 10 /* Wait to submit a initial riprequest */ 83#endif 84 85/* alignment constraint for routing socket */ 86#define ROUNDUP(a) \ 87 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 88#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 89 90/* 91 * Following two macros are highly depending on KAME Release 92 */ 93#define IN6_LINKLOCAL_IFINDEX(addr) \ 94 ((addr).s6_addr[2] << 8 | (addr).s6_addr[3]) 95 96#define SET_IN6_LINKLOCAL_IFINDEX(addr, index) \ 97 do { \ 98 (addr).s6_addr[2] = ((index) >> 8) & 0xff; \ 99 (addr).s6_addr[3] = (index) & 0xff; \ 100 } while (0) 101 102struct ifc { /* Configuration of an interface */ 103 char *ifc_name; /* if name */ 104 struct ifc *ifc_next; 105 int ifc_index; /* if index */ 106 int ifc_mtu; /* if mtu */ 107 int ifc_metric; /* if metric */ 108 short ifc_flags; /* flags */ 109 struct in6_addr ifc_mylladdr; /* my link-local address */ 110 struct sockaddr_in6 ifc_ripsin; /* rip multicast address */ 111 struct iff *ifc_filter; /* filter structure */ 112 struct ifac *ifc_addr; /* list of AF_INET6 addresses */ 113 int ifc_joined; /* joined to ff02::9 */ 114}; 115 116struct ifac { /* Adddress associated to an interface */ 117 struct ifc *ifa_conf; /* back pointer */ 118 struct ifac *ifa_next; 119 struct in6_addr ifa_addr; /* address */ 120 struct in6_addr ifa_raddr; /* remote address, valid in p2p */ 121 int ifa_plen; /* prefix length */ 122}; 123 124struct iff { 125 int iff_type; 126 struct in6_addr iff_addr; 127 int iff_plen; 128 struct iff *iff_next; 129}; 130 131struct ifc *ifc; 132int nifc; /* number of valid ifc's */ 133struct ifc **index2ifc; 134int nindex2ifc; 135struct ifc *loopifcp = NULL; /* pointing to loopback */ 136int loopifindex = 0; /* ditto */ 137fd_set sockvec; /* vector to select() for receiving */ 138int rtsock; /* the routing socket */ 139int ripsock; /* socket to send/receive RIP datagram */ 140 141struct rip6 *ripbuf; /* packet buffer for sending */ 142 143/* 144 * Maintain the routes in a linked list. When the number of the routes 145 * grows, somebody would like to introduce a hash based or a radix tree 146 * based strucutre. I believe the number of routes handled by RIP is 147 * limited and I don't have to manage a complex data structure, however. 148 * 149 * One of the major drawbacks of the linear linked list is the difficulty 150 * of representing the relationship between a couple of routes. This may 151 * be a significant problem when we have to support route aggregation with 152 * supressing the specifices covered by the aggregate. 153 */ 154 155struct riprt { 156 struct riprt *rrt_next; /* next destination */ 157 struct riprt *rrt_same; /* same destination - future use */ 158 struct netinfo6 rrt_info; /* network info */ 159 struct in6_addr rrt_gw; /* gateway */ 160 u_long rrt_flags; 161 time_t rrt_t; /* when the route validated */ 162 int rrt_index; /* ifindex from which this route got */ 163}; 164 165struct riprt *riprt = 0; 166 167int dflag = 0; /* debug flag */ 168int qflag = 0; /* quiet flag */ 169int nflag = 0; /* don't update kernel routing table */ 170int aflag = 0; /* age out even the statically defined routes */ 171int hflag = 0; /* don't split horizon */ 172int lflag = 0; /* exchange site local routes */ 173int sflag = 0; /* announce static routes w/ split horizon */ 174int Sflag = 0; /* announce static routes to every interface */ 175int routetag = 0; /* route tag attached on originating case */ 176 177char *filter[MAXFILTER]; 178int filtertype[MAXFILTER]; 179int nfilter = 0; 180 181pid_t pid; 182 183struct sockaddr_storage ripsin; 184 185struct rtentry rtentry; 186 187int interval = 1; 188time_t nextalarm = 0; 189time_t sup_trig_update = 0; 190 191FILE *rtlog = NULL; 192 193int logopened = 0; 194 195static u_long seq = 0; 196 197#define RTF_AGGREGATE 0x08000000 198#define RTF_NOADVERTISE 0x10000000 199#define RTF_NH_NOT_LLADDR 0x20000000 200#define RTF_SENDANYWAY 0x40000000 201#define RTF_CHANGED 0x80000000 202#define RTF_ROUTE_H 0xffff 203 204extern int errno; 205 206int main __P((int, char **)); 207void ripalarm __P((int)); 208void riprecv __P((void)); 209void ripsend __P((struct ifc *, struct sockaddr_in6 *, int)); 210void init __P((void)); 211void sockopt __P((struct ifc *)); 212void ifconfig __P((void)); 213void ifconfig1 __P((struct ifreq *, struct ifc *, int)); 214void rtrecv __P((void)); 215int rt_del __P((const struct sockaddr_in6 *, const struct sockaddr_in6 *, 216 const struct sockaddr_in6 *)); 217int rt_deladdr __P((struct ifc *, const struct sockaddr_in6 *, 218 const struct sockaddr_in6 *)); 219void filterconfig __P((void)); 220int getifmtu __P((int)); 221const char *rttypes __P((struct rt_msghdr *rtm)); 222const char *rtflags __P((struct rt_msghdr *rtm)); 223const char *ifflags __P((int flags)); 224void ifrt __P((struct ifc *, int)); 225void applymask __P((struct in6_addr *, struct in6_addr *)); 226void applyplen __P((struct in6_addr *, int)); 227void ifrtdump __P((int)); 228void ifdump __P((int)); 229void ifdump0 __P((FILE *, const struct ifc *)); 230void rtdump __P((int)); 231void rt_entry __P((struct rt_msghdr *, int)); 232void rtdexit __P((int)); 233void riprequest __P((struct ifc *, struct netinfo6 *, int, struct sockaddr_in6 *)); 234void ripflush __P((struct ifc *, struct sockaddr_in6 *)); 235void sendrequest __P((struct ifc *)); 236int mask2len __P((const struct in6_addr *, int)); 237int sendpacket __P((struct sockaddr_in6 *, int)); 238int addroute __P((struct riprt *, const struct in6_addr *, struct ifc *)); 239int delroute __P((struct netinfo6 *, struct in6_addr *)); 240struct in6_addr *getroute __P((struct netinfo6 *, struct in6_addr *)); 241void krtread __P((int)); 242int tobeadv __P((struct riprt *, struct ifc *)); 243char *allocopy __P((char *)); 244char *hms __P((void)); 245const char *inet6_n2p __P((const struct in6_addr *)); 246struct ifac *ifa_match __P((const struct ifc *, const struct in6_addr *, int)); 247struct in6_addr *plen2mask __P((int)); 248struct riprt *rtsearch __P((struct netinfo6 *)); 249int ripinterval __P((int)); 250time_t ripsuptrig __P((void)); 251void fatal __P((const char *, ...)); 252void trace __P((int, const char *, ...)); 253void tracet __P((int, const char *, ...)); 254unsigned int if_maxindex __P((void)); 255struct ifc *ifc_find __P((char *)); 256struct iff *iff_find __P((struct ifc *, int)); 257void setindex2ifc __P((int, struct ifc *)); 258 259#define MALLOC(type) ((type *)malloc(sizeof(type))) 260 261int 262main(argc, argv) 263 int argc; 264 char **argv; 265{ 266 int ch; 267 int error = 0; 268 struct ifc *ifcp; 269 sigset_t mask, omask; 270 FILE *pidfile; 271 extern char *optarg; 272 extern int optind; 273 char *progname; 274 275 progname = strrchr(*argv, '/'); 276 if (progname) 277 progname++; 278 else 279 progname = *argv; 280 281 pid = getpid(); 282 while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnqsS")) != EOF) { 283 switch (ch) { 284 case 'A': 285 case 'N': 286 case 'O': 287 case 'T': 288 case 'L': 289 if (nfilter >= MAXFILTER) 290 fatal("Exceeds MAXFILTER"); 291 filtertype[nfilter] = ch; 292 filter[nfilter++] = allocopy(optarg); 293 break; 294 case 't': 295 sscanf(optarg, "%i", &routetag); 296 if (routetag & ~0xffff) { 297 fatal("invalid route tag"); 298 /*NOTREACHED*/ 299 } 300 break; 301 case 'R': 302 if ((rtlog = fopen(optarg, "w")) == NULL) 303 fatal("Can not write to routelog"); 304 break; 305#define FLAG(c, flag, n) case c: flag = n; break 306 FLAG('a', aflag, 1); 307 FLAG('d', dflag, 1); 308 FLAG('D', dflag, 2); 309 FLAG('h', hflag, 1); 310 FLAG('l', lflag, 1); 311 FLAG('n', nflag, 1); 312 FLAG('q', qflag, 1); 313 FLAG('s', sflag, 1); 314 FLAG('S', Sflag, 1); 315#undef FLAG 316 default: 317 fatal("Invalid option specified, terminating"); 318 } 319 } 320 argc -= optind; 321 argv += optind; 322 if (argc > 0) 323 fatal("bogus extra arguments"); 324 325 if (geteuid()) { 326 nflag = 1; 327 fprintf(stderr, "No kernel update is allowed\n"); 328 } 329 openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON); 330 logopened++; 331 init(); 332 ifconfig(); 333 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 334 if (ifcp->ifc_index < 0) { 335 fprintf(stderr, 336"No ifindex found at %s (no link-local address?)\n", 337 ifcp->ifc_name); 338 error++; 339 } 340 } 341 if (error) 342 exit(1); 343 if (loopifcp == NULL) 344 fatal("No loopback found"); 345 loopifindex = loopifcp->ifc_index; 346 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) 347 ifrt(ifcp, 0); 348 filterconfig(); 349 krtread(0); 350 if (dflag) 351 ifrtdump(0); 352 353 if (dflag == 0) { 354 if (daemon(0, 0) < 0) 355 fatal("daemon"); 356 } 357 pid = getpid(); 358 if ((pidfile = fopen(ROUTE6D_PID, "w")) != NULL) { 359 fprintf(pidfile, "%d\n", pid); 360 fclose(pidfile); 361 } 362 363 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) 364 fatal("malloc"); 365 ripbuf->rip6_cmd = RIP6_RESPONSE; 366 ripbuf->rip6_vers = RIP6_VERSION; 367 ripbuf->rip6_res1[0] = 0; 368 ripbuf->rip6_res1[1] = 0; 369 370 if (signal(SIGALRM, ripalarm) == SIG_ERR) 371 fatal("signal: SIGALRM"); 372 if (signal(SIGQUIT, rtdexit) == SIG_ERR) 373 fatal("signal: SIGQUIT"); 374 if (signal(SIGTERM, rtdexit) == SIG_ERR) 375 fatal("signal: SIGTERM"); 376 if (signal(SIGUSR1, ifrtdump) == SIG_ERR) 377 fatal("signal: SIGUSR1"); 378 if (signal(SIGHUP, ifrtdump) == SIG_ERR) 379 fatal("signal: SIGHUP"); 380 if (signal(SIGINT, ifrtdump) == SIG_ERR) 381 fatal("signal: SIGINT"); 382 /* 383 * To avoid rip packet congestion (not on a cable but in this 384 * process), wait for a moment to send the first RIP6_RESPONSE 385 * packets. 386 */ 387 alarm(ripinterval(INIT_INTERVAL6)); 388 389 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 390 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 391 sendrequest(ifcp); 392 } 393 394 syslog(LOG_INFO, "**** Started ****"); 395 sigemptyset(&mask); 396 sigaddset(&mask, SIGALRM); 397 while (1) { 398 fd_set recvec; 399 400 FD_COPY(&sockvec, &recvec); 401 switch (select(FD_SETSIZE, &recvec, 0, 0, 0)) { 402 case -1: 403 if (errno == EINTR) 404 continue; 405 fatal("select"); 406 case 0: 407 continue; 408 default: 409 if (FD_ISSET(ripsock, &recvec)) { 410 sigprocmask(SIG_BLOCK, &mask, &omask); 411 riprecv(); 412 sigprocmask(SIG_SETMASK, &omask, NULL); 413 } 414 if (FD_ISSET(rtsock, &recvec)) { 415 sigprocmask(SIG_BLOCK, &mask, &omask); 416 rtrecv(); 417 sigprocmask(SIG_SETMASK, &omask, NULL); 418 } 419 } 420 } 421} 422 423/* 424 * gracefully exits after resetting sockopts. 425 */ 426/* ARGSUSED */ 427void 428rtdexit(sig) 429 int sig; 430{ 431 struct riprt *rrt; 432 433 alarm(0); 434 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 435 if (rrt->rrt_flags & RTF_AGGREGATE) { 436 delroute(&rrt->rrt_info, &rrt->rrt_gw); 437 } 438 } 439 close(ripsock); 440 close(rtsock); 441 syslog(LOG_INFO, "**** Terminated ****"); 442 closelog(); 443 exit(1); 444} 445 446/* 447 * Called periodically: 448 * 1. age out the learned route. remove it if necessary. 449 * 2. submit RIP6_RESPONSE packets. 450 * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have 451 * to invoke this function in every 1 or 5 or 10 seconds only to age the 452 * routes more precisely. 453 */ 454/* ARGSUSED */ 455void 456ripalarm(sig) 457 int sig; 458{ 459 struct ifc *ifcp; 460 struct riprt *rrt, *rrt_prev, *rrt_next; 461 time_t t_lifetime, t_holddown; 462 463 /* age the RIP routes */ 464 rrt_prev = 0; 465 t_lifetime = time(NULL) - RIP_LIFETIME; 466 t_holddown = t_lifetime - RIP_HOLDDOWN; 467 for (rrt = riprt; rrt; rrt = rrt_next) { 468 rrt_next = rrt->rrt_next; 469 470 if (rrt->rrt_t == 0) { 471 rrt_prev = rrt; 472 continue; 473 } 474 if (rrt->rrt_t < t_holddown) { 475 if (rrt_prev) { 476 rrt_prev->rrt_next = rrt->rrt_next; 477 } else { 478 riprt = rrt->rrt_next; 479 } 480 delroute(&rrt->rrt_info, &rrt->rrt_gw); 481 free(rrt); 482 continue; 483 } 484 if (rrt->rrt_t < t_lifetime) 485 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 486 rrt_prev = rrt; 487 } 488 /* Supply updates */ 489 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 490 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP)) 491 ripsend(ifcp, &ifcp->ifc_ripsin, 0); 492 } 493 alarm(ripinterval(SUPPLY_INTERVAL6)); 494} 495 496void 497init() 498{ 499 int i; 500 int int0, int255, error; 501 struct addrinfo hints, *res; 502 char port[10]; 503 504 ifc = (struct ifc *)NULL; 505 nifc = 0; 506 nindex2ifc = 0; /*initial guess*/ 507 index2ifc = NULL; 508 snprintf(port, sizeof(port), "%d", RIP6_PORT); 509 510 memset(&hints, 0, sizeof(hints)); 511 hints.ai_family = PF_INET6; 512 hints.ai_socktype = SOCK_DGRAM; 513 hints.ai_flags = AI_PASSIVE; 514 error = getaddrinfo(NULL, port, &hints, &res); 515 if (error) 516 fatal(gai_strerror(error)); 517 if (res->ai_next) 518 fatal(":: resolved to multiple address"); 519 520 int0 = 0; int255 = 255; 521 ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 522 if (ripsock < 0) 523 fatal("rip socket"); 524 if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) 525 fatal("rip bind"); 526 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 527 &int255, sizeof(int255)) < 0) 528 fatal("rip IPV6_MULTICAST_HOPS"); 529 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 530 &int0, sizeof(int0)) < 0) 531 fatal("rip IPV6_MULTICAST_LOOP"); 532 i = 1; 533 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO, &i, sizeof(i)) < 0) 534 fatal("rip IPV6_PKTINFO"); 535 536 memset(&hints, 0, sizeof(hints)); 537 hints.ai_family = PF_INET6; 538 hints.ai_socktype = SOCK_DGRAM; 539 error = getaddrinfo(RIP6_DEST, port, &hints, &res); 540 if (error) 541 fatal(gai_strerror(error)); 542 if (res->ai_next) 543 fatal("%s resolved to multiple address", RIP6_DEST); 544 memcpy(&ripsin, res->ai_addr, res->ai_addrlen); 545 546#ifdef FD_ZERO 547 FD_ZERO(&sockvec); 548#else 549 memset(&sockvec, 0, sizeof(sockvec)); 550#endif 551 FD_SET(ripsock, &sockvec); 552 553 if (nflag == 0) { 554 if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) 555 fatal("route socket"); 556 FD_SET(rtsock, &sockvec); 557 } else 558 rtsock = -1; /*just for safety */ 559} 560 561#define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6)) 562 563/* 564 * ripflush flushes the rip datagram stored in the rip buffer 565 */ 566static int nrt; 567static struct netinfo6 *np; 568 569void 570ripflush(ifcp, sin) 571 struct ifc *ifcp; 572 struct sockaddr_in6 *sin; 573{ 574 int i; 575 int error; 576 577 if (ifcp) 578 tracet(1, "Send(%s): info(%d) to %s.%d\n", 579 ifcp->ifc_name, nrt, 580 inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port)); 581 else 582 tracet(1, "Send: info(%d) to %s.%d\n", 583 nrt, inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port)); 584 if (dflag >= 2) { 585 np = ripbuf->rip6_nets; 586 for (i = 0; i < nrt; i++, np++) { 587 if (np->rip6_metric == NEXTHOP_METRIC) { 588 if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) 589 trace(2, " NextHop reset"); 590 else { 591 trace(2, " NextHop %s", 592 inet6_n2p(&np->rip6_dest)); 593 } 594 } else { 595 trace(2, " %s/%d[%d]", 596 inet6_n2p(&np->rip6_dest), 597 np->rip6_plen, np->rip6_metric); 598 } 599 if (np->rip6_tag) { 600 trace(2, " tag=0x%04x", 601 ntohs(np->rip6_tag) & 0xffff); 602 } 603 trace(2, "\n"); 604 } 605 } 606 error = sendpacket(sin, RIPSIZE(nrt)); 607 if (error == EAFNOSUPPORT) { 608 /* Protocol not supported */ 609 tracet(1, "Could not send info to %s (%s): " 610 "set IFF_UP to 0\n", 611 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 612 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 613 } 614 nrt = 0; np = ripbuf->rip6_nets; 615} 616 617/* 618 * Generate RIP6_RESPONSE packets and send them. 619 */ 620void 621ripsend(ifcp, sin, flag) 622 struct ifc *ifcp; 623 struct sockaddr_in6 *sin; 624 int flag; 625{ 626 struct riprt *rrt; 627 struct in6_addr *nh; /* next hop */ 628 struct in6_addr ia; 629 struct iff *iffp; 630 int maxrte, ok; 631 632 if (ifcp == NULL) { 633 /* 634 * Request from non-link local address is not 635 * a regular route6d update. 636 */ 637 maxrte = (IFMINMTU - sizeof(struct ip6_hdr) - 638 sizeof(struct udphdr) - 639 sizeof(struct rip6) + sizeof(struct netinfo6)) / 640 sizeof(struct netinfo6); 641 nrt = 0; np = ripbuf->rip6_nets; nh = NULL; 642 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 643 if (rrt->rrt_flags & RTF_NOADVERTISE) 644 continue; 645 /* Put the route to the buffer */ 646 *np = rrt->rrt_info; 647 np++; nrt++; 648 if (nrt == maxrte) { 649 ripflush(NULL, sin); 650 nh = NULL; 651 } 652 } 653 if (nrt) /* Send last packet */ 654 ripflush(NULL, sin); 655 return; 656 } 657 658 if ((flag & RTF_SENDANYWAY) == 0 && 659 (qflag || (ifcp->ifc_flags & IFF_LOOPBACK))) 660 return; 661 if (iff_find(ifcp, 'N') != NULL) 662 return; 663 if (iff_find(ifcp, 'T') != NULL) { 664 struct netinfo6 rrt_info; 665 memset(&rrt_info, 0, sizeof(struct netinfo6)); 666 rrt_info.rip6_dest = in6addr_any; 667 rrt_info.rip6_plen = 0; 668 rrt_info.rip6_metric = 1; 669 rrt_info.rip6_tag = htons(routetag & 0xffff); 670 np = ripbuf->rip6_nets; 671 *np = rrt_info; 672 nrt = 1; 673 ripflush(ifcp, sin); 674 return; 675 } 676 maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) - 677 sizeof(struct udphdr) - 678 sizeof(struct rip6) + sizeof(struct netinfo6)) / 679 sizeof(struct netinfo6); 680 nrt = 0; np = ripbuf->rip6_nets; nh = NULL; 681 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 682 if (rrt->rrt_flags & RTF_NOADVERTISE) 683 continue; 684 /* Need to check filer here */ 685 ok = 1; 686 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 687 if (iffp->iff_type != 'A') 688 continue; 689 if (rrt->rrt_info.rip6_plen <= iffp->iff_plen) 690 continue; 691 ia = rrt->rrt_info.rip6_dest; 692 applyplen(&ia, iffp->iff_plen); 693 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 694 ok = 0; 695 break; 696 } 697 } 698 if (!ok) 699 continue; 700 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 701 if (iffp->iff_type != 'O') 702 continue; 703 ok = 0; 704 if (rrt->rrt_info.rip6_plen < iffp->iff_plen) 705 continue; 706 ia = rrt->rrt_info.rip6_dest; 707 applyplen(&ia, iffp->iff_plen); 708 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 709 ok = 1; 710 break; 711 } 712 } 713 if (!ok) 714 continue; 715 /* Check split horizon and other conditions */ 716 if (tobeadv(rrt, ifcp) == 0) 717 continue; 718 /* Only considers the routes with flag if specified */ 719 if ((flag & RTF_CHANGED) && (rrt->rrt_flags & RTF_CHANGED) == 0) 720 continue; 721 /* Check nexthop */ 722 if (rrt->rrt_index == ifcp->ifc_index && 723 !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) && 724 (rrt->rrt_flags & RTF_NH_NOT_LLADDR) == 0) { 725 if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) { 726 if (nrt == maxrte - 2) 727 ripflush(ifcp, sin); 728 np->rip6_dest = rrt->rrt_gw; 729 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) 730 SET_IN6_LINKLOCAL_IFINDEX(np->rip6_dest, 0); 731 np->rip6_plen = 0; 732 np->rip6_tag = 0; 733 np->rip6_metric = NEXTHOP_METRIC; 734 nh = &rrt->rrt_gw; 735 np++; nrt++; 736 } 737 } else if (nh && (rrt->rrt_index != ifcp->ifc_index || 738 !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) || 739 rrt->rrt_flags & RTF_NH_NOT_LLADDR)) { 740 /* Reset nexthop */ 741 if (nrt == maxrte - 2) 742 ripflush(ifcp, sin); 743 memset(np, 0, sizeof(struct netinfo6)); 744 np->rip6_metric = NEXTHOP_METRIC; 745 nh = NULL; 746 np++; nrt++; 747 } 748 /* Put the route to the buffer */ 749 *np = rrt->rrt_info; 750 np++; nrt++; 751 if (nrt == maxrte) { 752 ripflush(ifcp, sin); 753 nh = NULL; 754 } 755 } 756 if (nrt) /* Send last packet */ 757 ripflush(ifcp, sin); 758} 759 760/* 761 * Determine if the route is to be advertised on the specified interface. 762 * It checks options specified in the arguments and the split horizon rule. 763 */ 764int 765tobeadv(rrt, ifcp) 766 struct riprt *rrt; 767 struct ifc *ifcp; 768{ 769 770 /* Special care for static routes */ 771 if (rrt->rrt_flags & RTF_STATIC) { 772 if (Sflag) /* Yes, advertise it anyway */ 773 return 1; 774 if (sflag && rrt->rrt_index != ifcp->ifc_index) 775 return 1; 776 return 0; 777 } 778 /* Regular split horizon */ 779 if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index) 780 return 0; 781 return 1; 782} 783 784/* 785 * Send a rip packet actually. 786 */ 787int 788sendpacket(sin, len) 789 struct sockaddr_in6 *sin; 790 int len; 791{ 792 /* 793 * MSG_DONTROUTE should not be specified when it responds with a 794 * RIP6_REQUEST message. SO_DONTROUTE has been specified to 795 * other sockets. 796 */ 797 struct msghdr m; 798 struct cmsghdr *cm; 799 struct iovec iov[2]; 800 u_char cmsgbuf[256]; 801 struct in6_pktinfo *pi; 802 int index; 803 struct sockaddr_in6 sincopy; 804 805 /* do not overwrite the given sin */ 806 sincopy = *sin; 807 sin = &sincopy; 808 809 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) 810 || IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) { 811 index = IN6_LINKLOCAL_IFINDEX(sin->sin6_addr); 812 SET_IN6_LINKLOCAL_IFINDEX(sin->sin6_addr, 0); 813 } else 814 index = 0; 815 816 m.msg_name = (caddr_t)sin; 817 m.msg_namelen = sizeof(*sin); 818 iov[0].iov_base = (caddr_t)ripbuf; 819 iov[0].iov_len = len; 820 m.msg_iov = iov; 821 m.msg_iovlen = 1; 822 if (!index) { 823 m.msg_control = NULL; 824 m.msg_controllen = 0; 825 } else { 826 memset(cmsgbuf, 0, sizeof(cmsgbuf)); 827 cm = (struct cmsghdr *)cmsgbuf; 828 m.msg_control = (caddr_t)cm; 829 m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); 830 831 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); 832 cm->cmsg_level = IPPROTO_IPV6; 833 cm->cmsg_type = IPV6_PKTINFO; 834 pi = (struct in6_pktinfo *)CMSG_DATA(cm); 835 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/ 836 pi->ipi6_ifindex = index; 837 } 838 839 if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) { 840 trace(1, "sendmsg: %s\n", strerror(errno)); 841 return errno; 842 } 843 return 0; 844} 845 846/* 847 * Receive and process RIP packets. Update the routes/kernel forwarding 848 * table if necessary. 849 */ 850void 851riprecv() 852{ 853 struct ifc *ifcp, *ic; 854 struct sockaddr_in6 fsock; 855 struct in6_addr nh; /* next hop */ 856 struct rip6 *rp; 857 struct netinfo6 *np, *nq; 858 struct riprt *rrt; 859 int len, nn, need_trigger, index; 860 char buf[4 * RIP6_MAXMTU]; 861 time_t t; 862 struct msghdr m; 863 struct cmsghdr *cm; 864 struct iovec iov[2]; 865 u_char cmsgbuf[256]; 866 struct in6_pktinfo *pi; 867 struct iff *iffp; 868 struct in6_addr ia; 869 int ok; 870 871 need_trigger = 0; 872 m.msg_name = (caddr_t)&fsock; 873 m.msg_namelen = sizeof(fsock); 874 iov[0].iov_base = (caddr_t)buf; 875 iov[0].iov_len = sizeof(buf); 876 m.msg_iov = iov; 877 m.msg_iovlen = 1; 878 cm = (struct cmsghdr *)cmsgbuf; 879 m.msg_control = (caddr_t)cm; 880 m.msg_controllen = sizeof(cmsgbuf); 881 if ((len = recvmsg(ripsock, &m, 0)) < 0) 882 fatal("recvmsg"); 883 index = 0; 884 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m); 885 cm; 886 cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) { 887 if (cm->cmsg_level == IPPROTO_IPV6 888 && cm->cmsg_type == IPV6_PKTINFO) { 889 pi = (struct in6_pktinfo *)(CMSG_DATA(cm)); 890 index = pi->ipi6_ifindex; 891 break; 892 } 893 } 894 if (index && IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) 895 SET_IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr, index); 896 897 nh = fsock.sin6_addr; 898 nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 899 sizeof(struct netinfo6); 900 rp = (struct rip6 *)buf; 901 np = rp->rip6_nets; 902 903 if (rp->rip6_vers != RIP6_VERSION) { 904 trace(1, "Incorrect RIP version %d\n", rp->rip6_vers); 905 return; 906 } 907 if (rp->rip6_cmd == RIP6_REQUEST) { 908 if (index && index < nindex2ifc) { 909 ifcp = index2ifc[index]; 910 riprequest(ifcp, np, nn, &fsock); 911 } else { 912 riprequest(NULL, np, nn, &fsock); 913 } 914 return; 915 } 916 917 if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) { 918 trace(1, "Packets from non-ll addr: %s\n", 919 inet6_n2p(&fsock.sin6_addr)); 920 return; /* Ignore packets from non-link-local addr */ 921 } 922 index = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr); 923 ifcp = (index < nindex2ifc) ? index2ifc[index] : NULL; 924 if (!ifcp) { 925 trace(1, "Packets to unknown interface index %d\n", index); 926 return; /* Ignore it */ 927 } 928 if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr)) 929 return; /* The packet is from me; ignore */ 930 if (rp->rip6_cmd != RIP6_RESPONSE) { 931 trace(1, "Invalid command %d\n", rp->rip6_cmd); 932 return; 933 } 934 if (iff_find(ifcp, 'N') != NULL) 935 return; 936 tracet(1, "Recv(%s): from %s.%d info(%d)\n", 937 ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), nn); 938 939 t = time(NULL); 940 for (; nn; nn--, np++) { 941 if (np->rip6_metric == NEXTHOP_METRIC) { 942 /* modify neighbor address */ 943 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 944 nh = np->rip6_dest; 945 SET_IN6_LINKLOCAL_IFINDEX(nh, index); 946 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 947 } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) { 948 nh = fsock.sin6_addr; 949 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh)); 950 } else { 951 nh = fsock.sin6_addr; 952 trace(1, "\tInvalid Nexthop: %s\n", 953 inet6_n2p(&np->rip6_dest)); 954 } 955 continue; 956 } 957 if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) { 958 trace(1, "\tMulticast netinfo6: %s/%d [%d]\n", 959 inet6_n2p(&np->rip6_dest), 960 np->rip6_plen, np->rip6_metric); 961 continue; 962 } 963 if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) { 964 trace(1, "\tLoopback netinfo6: %s/%d [%d]\n", 965 inet6_n2p(&np->rip6_dest), 966 np->rip6_plen, np->rip6_metric); 967 continue; 968 } 969 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) { 970 trace(1, "\tLink Local netinfo6: %s/%d [%d]\n", 971 inet6_n2p(&np->rip6_dest), 972 np->rip6_plen, np->rip6_metric); 973 continue; 974 } 975 /* may need to pass sitelocal prefix in some case, however*/ 976 if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) { 977 trace(1, "\tSite Local netinfo6: %s/%d [%d]\n", 978 inet6_n2p(&np->rip6_dest), 979 np->rip6_plen, np->rip6_metric); 980 continue; 981 } 982 trace(2, "\tnetinfo6: %s/%d [%d]", 983 inet6_n2p(&np->rip6_dest), 984 np->rip6_plen, np->rip6_metric); 985 if (np->rip6_tag) 986 trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff); 987 988 /* Listen-only filter */ 989 ok = 1; /* if there's no L filter, it is ok */ 990 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 991 if (iffp->iff_type != 'L') 992 continue; 993 ok = 0; 994 if (np->rip6_plen < iffp->iff_plen) 995 continue; 996 /* special rule: ::/0 means default, not "in /0" */ 997 if (iffp->iff_plen == 0 && np->rip6_plen > 0) 998 continue; 999 ia = np->rip6_dest; 1000 applyplen(&ia, iffp->iff_plen); 1001 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) { 1002 ok = 1; 1003 break; 1004 } 1005 } 1006 if (!ok) { 1007 trace(2, " (filtered)\n"); 1008 continue; 1009 } 1010 1011 trace(2, "\n"); 1012 np->rip6_metric++; 1013 np->rip6_metric += ifcp->ifc_metric; 1014 if (np->rip6_metric > HOPCNT_INFINITY6) 1015 np->rip6_metric = HOPCNT_INFINITY6; 1016 1017 applyplen(&np->rip6_dest, np->rip6_plen); 1018 if ((rrt = rtsearch(np)) != NULL) { 1019 if (rrt->rrt_t == 0) 1020 continue; /* Intf route has priority */ 1021 nq = &rrt->rrt_info; 1022 if (nq->rip6_metric > np->rip6_metric) { 1023 if (rrt->rrt_index == ifcp->ifc_index && 1024 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 1025 /* Small metric from the same gateway */ 1026 nq->rip6_metric = np->rip6_metric; 1027 } else { 1028 /* Better route found */ 1029 rrt->rrt_index = ifcp->ifc_index; 1030 /* Update routing table */ 1031 delroute(nq, &rrt->rrt_gw); 1032 rrt->rrt_gw = nh; 1033 *nq = *np; 1034 addroute(rrt, &nh, ifcp); 1035 } 1036 rrt->rrt_flags |= RTF_CHANGED; 1037 rrt->rrt_t = t; 1038 need_trigger = 1; 1039 } else if (nq->rip6_metric < np->rip6_metric && 1040 rrt->rrt_index == ifcp->ifc_index && 1041 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) { 1042 /* Got worse route from same gw */ 1043 nq->rip6_metric = np->rip6_metric; 1044 rrt->rrt_t = t; 1045 rrt->rrt_flags |= RTF_CHANGED; 1046 need_trigger = 1; 1047 } else if (nq->rip6_metric == np->rip6_metric && 1048 rrt->rrt_index == ifcp->ifc_index && 1049 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw) && 1050 np->rip6_metric < HOPCNT_INFINITY6) { 1051 /* same metric, same route from same gw */ 1052 rrt->rrt_t = t; 1053 } 1054 /* 1055 * if nq->rip6_metric == HOPCNT_INFINITY6 then 1056 * do not update age value. Do nothing. 1057 */ 1058 } else if (np->rip6_metric < HOPCNT_INFINITY6) { 1059 /* Got a new valid route */ 1060 if ((rrt = MALLOC(struct riprt)) == NULL) 1061 fatal("malloc: struct riprt"); 1062 nq = &rrt->rrt_info; 1063 1064 rrt->rrt_same = NULL; 1065 rrt->rrt_index = ifcp->ifc_index; 1066 rrt->rrt_flags = RTF_UP|RTF_GATEWAY; 1067 rrt->rrt_gw = nh; 1068 *nq = *np; 1069 applyplen(&nq->rip6_dest, nq->rip6_plen); 1070 if (nq->rip6_plen == sizeof(struct in6_addr) * 8) 1071 rrt->rrt_flags |= RTF_HOST; 1072 1073 /* Put the route to the list */ 1074 rrt->rrt_next = riprt; 1075 riprt = rrt; 1076 /* Update routing table */ 1077 addroute(rrt, &nh, ifcp); 1078 rrt->rrt_flags |= RTF_CHANGED; 1079 need_trigger = 1; 1080 rrt->rrt_t = t; 1081 } 1082 } 1083 /* XXX need to care the interval between triggered updates */ 1084 if (need_trigger) { 1085 if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) { 1086 for (ic = ifc; ic; ic = ic->ifc_next) { 1087 if (ifcp->ifc_index == ic->ifc_index) 1088 continue; 1089 if (ic->ifc_flags & IFF_UP) 1090 ripsend(ic, &ic->ifc_ripsin, 1091 RTF_CHANGED); 1092 } 1093 } 1094 /* Reset the flag */ 1095 for (rrt = riprt; rrt; rrt = rrt->rrt_next) 1096 rrt->rrt_flags &= ~RTF_CHANGED; 1097 } 1098} 1099 1100/* 1101 * Send all routes request packet to the specified interface. 1102 */ 1103void 1104sendrequest(ifcp) 1105 struct ifc *ifcp; 1106{ 1107 struct netinfo6 *np; 1108 int error; 1109 1110 if (ifcp->ifc_flags & IFF_LOOPBACK) 1111 return; 1112 ripbuf->rip6_cmd = RIP6_REQUEST; 1113 np = ripbuf->rip6_nets; 1114 memset(np, 0, sizeof(struct netinfo6)); 1115 np->rip6_metric = HOPCNT_INFINITY6; 1116 tracet(1, "Send rtdump Request to %s (%s)\n", 1117 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 1118 error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1)); 1119 if (error == EAFNOSUPPORT) { 1120 /* Protocol not supported */ 1121 tracet(1, "Could not send rtdump Request to %s (%s): " 1122 "set IFF_UP to 0\n", 1123 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); 1124 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */ 1125 } 1126 ripbuf->rip6_cmd = RIP6_RESPONSE; 1127} 1128 1129/* 1130 * Process a RIP6_REQUEST packet. 1131 */ 1132void 1133riprequest(ifcp, np, nn, sin) 1134 struct ifc *ifcp; 1135 struct netinfo6 *np; 1136 int nn; 1137 struct sockaddr_in6 *sin; 1138{ 1139 int i; 1140 struct riprt *rrt; 1141 1142 if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) && 1143 np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) { 1144 /* Specific response, don't split-horizon */ 1145 trace(1, "\tRIP Request\n"); 1146 for (i = 0; i < nn; i++, np++) { 1147 rrt = rtsearch(np); 1148 if (rrt) 1149 np->rip6_metric = rrt->rrt_info.rip6_metric; 1150 else 1151 np->rip6_metric = HOPCNT_INFINITY6; 1152 } 1153 (void)sendpacket(sin, RIPSIZE(nn)); 1154 return; 1155 } 1156 /* Whole routing table dump */ 1157 trace(1, "\tRIP Request -- whole routing table\n"); 1158 ripsend(ifcp, sin, RTF_SENDANYWAY); 1159} 1160 1161/* 1162 * Get information of each interface. 1163 */ 1164void 1165ifconfig() 1166{ 1167 int s, i; 1168 char *buf; 1169 struct ifconf ifconf; 1170 struct ifreq *ifrp, ifr; 1171 struct ifc *ifcp; 1172 struct ipv6_mreq mreq; 1173 int bufsiz; 1174 1175 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) 1176 fatal("socket"); 1177 1178 /* wild guess - v4, media, link, v6 * 3 */ 1179 bufsiz = if_maxindex() * sizeof(struct ifreq) * 6; 1180 if ((buf = (char *)malloc(bufsiz)) == NULL) 1181 fatal("malloc"); 1182 1183 /* 1184 * ioctl(SIOCGIFCONF) does not return error on buffer size. 1185 * we'll try to guess the buffer size by trying it twice, with 1186 * different buffer size. 1187 */ 1188 ifconf.ifc_buf = buf; 1189 ifconf.ifc_len = bufsiz / 2; 1190 if (ioctl(s, SIOCGIFCONF, (char *)&ifconf) < 0) 1191 fatal("ioctl: SIOCGIFCONF"); 1192 i = ifconf.ifc_len; 1193 while (1) { 1194 ifconf.ifc_buf = buf; 1195 ifconf.ifc_len = bufsiz; 1196 if (ioctl(s, SIOCGIFCONF, (char *)&ifconf) < 0) 1197 fatal("ioctl: SIOCGIFCONF"); 1198 if (i == ifconf.ifc_len) 1199 break; 1200 i = ifconf.ifc_len; 1201 bufsiz *= 2; 1202 if ((buf = (char *)realloc(buf, bufsiz)) == NULL) 1203 fatal("realloc"); 1204 } 1205 for (i = 0; i < ifconf.ifc_len; ) { 1206 ifrp = (struct ifreq *)(buf + i); 1207 if (ifrp->ifr_addr.sa_family != AF_INET6) 1208 goto skip; 1209 ifcp = ifc_find(ifrp->ifr_name); 1210 strcpy(ifr.ifr_name, ifrp->ifr_name); 1211 if (ioctl(s, SIOCGIFFLAGS, (char *)&ifr) < 0) 1212 fatal("ioctl: SIOCGIFFLAGS"); 1213 /* we are interested in multicast-capable interfaces */ 1214 if ((ifr.ifr_flags & IFF_MULTICAST) == 0) 1215 goto skip; 1216 if (!ifcp) { 1217 /* new interface */ 1218 ifcp = (struct ifc *)malloc(sizeof(*ifcp)); 1219 memset(ifcp, 0, sizeof(*ifcp)); 1220 ifcp->ifc_index = -1; 1221 ifcp->ifc_next = ifc; 1222 ifc = ifcp; 1223 nifc++; 1224 ifcp->ifc_name = allocopy(ifrp->ifr_name); 1225 ifcp->ifc_addr = 0; 1226 ifcp->ifc_filter = 0; 1227 ifcp->ifc_flags = ifr.ifr_flags; 1228 trace(1, "newif %s <%s>\n", ifcp->ifc_name, 1229 ifflags(ifcp->ifc_flags)); 1230 if (!strcmp(ifcp->ifc_name, LOOPBACK_IF)) 1231 loopifcp = ifcp; 1232 } else { 1233 /* update flag, this may be up again */ 1234 if (ifcp->ifc_flags != ifr.ifr_flags) { 1235 trace(1, "%s: <%s> -> ", ifcp->ifc_name, 1236 ifflags(ifcp->ifc_flags)); 1237 trace(1, "<%s>\n", ifflags(ifr.ifr_flags)); 1238 } 1239 ifcp->ifc_flags = ifr.ifr_flags; 1240 } 1241 ifconfig1(ifrp, ifcp, s); 1242 if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP 1243 && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { 1244 mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; 1245 mreq.ipv6mr_interface = ifcp->ifc_index; 1246 if (setsockopt(ripsock, IPPROTO_IPV6, 1247 IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) < 0) 1248 fatal("IPV6_JOIN_GROUP"); 1249 trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST); 1250 ifcp->ifc_joined++; 1251 } 1252skip: 1253 i += IFNAMSIZ; 1254 if (ifrp->ifr_addr.sa_len > sizeof(struct sockaddr)) 1255 i += ifrp->ifr_addr.sa_len; 1256 else 1257 i += sizeof(struct sockaddr); 1258 } 1259 close(s); 1260 free(buf); 1261} 1262 1263void 1264ifconfig1(ifrp, ifcp, s) 1265 struct ifreq *ifrp; 1266 struct ifc *ifcp; 1267 int s; 1268{ 1269 struct in6_ifreq ifr; 1270 struct sockaddr_in6 *sin; 1271 struct ifac *ifa; 1272 int plen; 1273 char buf[BUFSIZ]; 1274 1275 sin = (struct sockaddr_in6 *)&ifrp->ifr_addr; 1276 ifr.ifr_addr = *sin; 1277 strcpy(ifr.ifr_name, ifrp->ifr_name); 1278 if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) 1279 fatal("ioctl: SIOCGIFNETMASK_IN6"); 1280 plen = mask2len(&ifr.ifr_addr.sin6_addr, 16); 1281 if ((ifa = ifa_match(ifcp, &sin->sin6_addr, plen)) != NULL) { 1282 /* same interface found */ 1283 /* need check if something changed */ 1284 /* XXX not yet implemented */ 1285 return; 1286 } 1287 /* 1288 * New address is found 1289 */ 1290 if ((ifa = MALLOC(struct ifac)) == NULL) 1291 fatal("malloc: struct ifac"); 1292 ifa->ifa_conf = ifcp; 1293 ifa->ifa_next = ifcp->ifc_addr; 1294 ifcp->ifc_addr = ifa; 1295 ifa->ifa_addr = sin->sin6_addr; 1296 ifa->ifa_plen = plen; 1297 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1298 ifr.ifr_addr = *sin; 1299 if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) 1300 fatal("ioctl: SIOCGIFDSTADDR_IN6"); 1301 ifa->ifa_raddr = ifr.ifr_dstaddr.sin6_addr; 1302 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, buf, sizeof(buf)); 1303 trace(1, "found address %s/%d -- %s\n", 1304 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen, buf); 1305 } else { 1306 trace(1, "found address %s/%d\n", 1307 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen); 1308 } 1309 if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) { 1310 ifcp->ifc_mylladdr = ifa->ifa_addr; 1311 ifcp->ifc_index = IN6_LINKLOCAL_IFINDEX(ifa->ifa_addr); 1312 memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len); 1313 SET_IN6_LINKLOCAL_IFINDEX(ifcp->ifc_ripsin.sin6_addr, 1314 ifcp->ifc_index); 1315 setindex2ifc(ifcp->ifc_index, ifcp); 1316 ifcp->ifc_mtu = getifmtu(ifcp->ifc_index); 1317 if (ifcp->ifc_mtu > RIP6_MAXMTU) 1318 ifcp->ifc_mtu = RIP6_MAXMTU; 1319 if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) 1320 fatal("ioctl: SIOCGIFMETRIC"); 1321 ifcp->ifc_metric = ifr.ifr_metric; 1322 trace(1, "\tindex: %d, mtu: %d, metric: %d\n", 1323 ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric); 1324 } 1325} 1326 1327/* 1328 * Receive and process routing messages. 1329 * Update interface information as necesssary. 1330 */ 1331void 1332rtrecv() 1333{ 1334 char buf[BUFSIZ]; 1335 char *p, *q; 1336 struct rt_msghdr *rtm; 1337 struct ifa_msghdr *ifam; 1338 struct if_msghdr *ifm; 1339 int len; 1340 struct ifc *ifcp; 1341 int iface = 0, rtable = 0; 1342 struct sockaddr_in6 *rta[RTAX_MAX]; 1343 int i, addrs; 1344 1345 if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 1346 perror("read from rtsock"); 1347 exit(-1); 1348 } 1349 if (len < sizeof(*rtm)) { 1350 trace(1, "short read from rtsock: %d (should be > %d)\n", 1351 len, sizeof(*rtm)); 1352 return; 1353 } 1354 1355 for (p = buf; p - buf < len; p += ((struct rt_msghdr *)p)->rtm_msglen) { 1356 /* safety against bogus message */ 1357 if (((struct rt_msghdr *)p)->rtm_msglen <= 0) { 1358 trace(1, "bogus rtmsg: length=%d\n", 1359 ((struct rt_msghdr *)p)->rtm_msglen); 1360 break; 1361 } 1362 rtm = NULL; 1363 ifam = NULL; 1364 ifm = NULL; 1365 switch (((struct rt_msghdr *)p)->rtm_type) { 1366 case RTM_NEWADDR: 1367 case RTM_DELADDR: 1368 ifam = (struct ifa_msghdr *)p; 1369 addrs = ifam->ifam_addrs; 1370 q = (char *)(ifam + 1); 1371 break; 1372 case RTM_IFINFO: 1373 ifm = (struct if_msghdr *)p; 1374 addrs = ifm->ifm_addrs; 1375 q = (char *)(ifm + 1); 1376 break; 1377 default: 1378 rtm = (struct rt_msghdr *)p; 1379 addrs = rtm->rtm_addrs; 1380 q = (char *)(rtm + 1); 1381 if (rtm->rtm_version != RTM_VERSION) { 1382 trace(1, "unexpected rtmsg version %d " 1383 "(should be %d)\n", 1384 rtm->rtm_version, RTM_VERSION); 1385 continue; 1386 } 1387 if (rtm->rtm_pid == pid) { 1388#if 0 1389 trace(1, "rtmsg looped back to me, ignored\n"); 1390#endif 1391 continue; 1392 } 1393 break; 1394 } 1395 memset(&rta, 0, sizeof(rta)); 1396 for (i = 0; i < RTAX_MAX; i++) { 1397 if (addrs & (1 << i)) { 1398 rta[i] = (struct sockaddr_in6 *)q; 1399 q += ROUNDUP(rta[i]->sin6_len); 1400 } 1401 } 1402 1403 trace(1, "rtsock: %s (addrs=%x)\n", 1404 rttypes((struct rt_msghdr *)p), addrs); 1405 if (dflag >= 2) { 1406 int i; 1407 for (i = 0; 1408 i < ((struct rt_msghdr *)p)->rtm_msglen; 1409 i++) { 1410 fprintf(stderr, "%02x ", p[i] & 0xff); 1411 if (i % 16 == 15) fprintf(stderr, "\n"); 1412 } 1413 fprintf(stderr, "\n"); 1414 } 1415 1416 /* 1417 * Easy ones first. 1418 * 1419 * We may be able to optimize by using ifm->ifm_index or 1420 * ifam->ifam_index. For simplicity we don't do that here. 1421 */ 1422 switch (((struct rt_msghdr *)p)->rtm_type) { 1423 case RTM_NEWADDR: 1424 case RTM_IFINFO: 1425 iface++; 1426 continue; 1427 case RTM_ADD: 1428 rtable++; 1429 continue; 1430 case RTM_LOSING: 1431 case RTM_MISS: 1432 case RTM_RESOLVE: 1433 case RTM_GET: 1434 case RTM_LOCK: 1435 /* nothing to be done here */ 1436 trace(1, "\tnothing to be done, ignored\n"); 1437 continue; 1438 } 1439 1440#if 0 1441 if (rta[RTAX_DST] == NULL) { 1442 trace(1, "\tno destination, ignored\n"); 1443 continue; 1444 } 1445 if (rta[RTAX_DST]->sin6_family != AF_INET6) { 1446 trace(1, "\taf mismatch, ignored\n"); 1447 continue; 1448 } 1449 if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) { 1450 trace(1, "\tlinklocal destination, ignored\n"); 1451 continue; 1452 } 1453 if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) { 1454 trace(1, "\tloopback destination, ignored\n"); 1455 continue; /* Loopback */ 1456 } 1457 if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) { 1458 trace(1, "\tmulticast destination, ignored\n"); 1459 continue; 1460 } 1461#endif 1462 1463 /* hard ones */ 1464 switch (((struct rt_msghdr *)p)->rtm_type) { 1465 case RTM_NEWADDR: 1466 case RTM_IFINFO: 1467 case RTM_ADD: 1468 case RTM_LOSING: 1469 case RTM_MISS: 1470 case RTM_RESOLVE: 1471 case RTM_GET: 1472 case RTM_LOCK: 1473 /* should already be handled */ 1474 fatal("rtrecv: never reach here"); 1475 case RTM_DELETE: 1476 if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY] 1477 || !rta[RTAX_NETMASK]) { 1478 trace(1, "\tsome of dst/gw/netamsk are unavailable, ignored\n"); 1479 break; 1480 } 1481 if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY], rta[RTAX_NETMASK]) == 0) { 1482 rtable++; /*just to be sure*/ 1483 } 1484 break; 1485 case RTM_CHANGE: 1486 case RTM_REDIRECT: 1487 trace(1, "\tnot supported yet, ignored\n"); 1488 break; 1489 case RTM_DELADDR: 1490 if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) { 1491 trace(1, "\tno netmask or ifa given, ignored\n"); 1492 break; 1493 } 1494 if (ifam->ifam_index < nindex2ifc) 1495 ifcp = index2ifc[ifam->ifam_index]; 1496 else 1497 ifcp = NULL; 1498 if (!ifcp) { 1499 trace(1, "\tinvalid ifam_index %d, ignored\n", 1500 ifam->ifam_index); 1501 break; 1502 } 1503 rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK]); 1504 iface++; 1505 break; 1506 case RTM_OLDADD: 1507 case RTM_OLDDEL: 1508 trace(1, "\tnot supported yet, ignored\n"); 1509 break; 1510 } 1511 1512 } 1513 1514 if (iface) { 1515 trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n"); 1516 ifconfig(); 1517 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) 1518 ifrt(ifcp, 1); 1519 } 1520 if (rtable) { 1521 trace(1, "rtsock: read routing table again\n"); 1522 krtread(1); 1523 } 1524} 1525 1526/* 1527 * remove specified route from the internal routing table. 1528 */ 1529int 1530rt_del(sdst, sgw, smask) 1531 const struct sockaddr_in6 *sdst; 1532 const struct sockaddr_in6 *sgw; 1533 const struct sockaddr_in6 *smask; 1534{ 1535 const struct in6_addr *dst = NULL; 1536 const struct in6_addr *gw = NULL; 1537 int prefix; 1538 struct netinfo6 ni6; 1539 struct riprt *rrt = NULL; 1540 time_t t_lifetime; 1541 1542 if (sdst->sin6_family != AF_INET6) { 1543 trace(1, "\tother AF, ignored\n"); 1544 return -1; 1545 } 1546 if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr) 1547 || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback) 1548 || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) { 1549 trace(1, "\taddress %s not interesting, ignored\n", 1550 inet6_n2p(&sdst->sin6_addr)); 1551 return -1; 1552 } 1553 dst = &sdst->sin6_addr; 1554 if (sgw->sin6_family == AF_INET6 1555 && smask->sin6_family == AF_INET6) { 1556 /* easy case */ 1557 gw = &sgw->sin6_addr; 1558 prefix = mask2len(&smask->sin6_addr, 16); 1559 } else if (sgw->sin6_family == AF_LINK) { 1560 /* 1561 * Interface route... a hard case. We need to get the prefix 1562 * length from the kernel, but we now are parsing rtmsg. 1563 * We'll purge matching routes from my list, then get the 1564 * fresh list. 1565 */ 1566 struct riprt *longest; 1567 trace(1, "\t%s is a interface route, guessing prefixlen\n", 1568 inet6_n2p(dst)); 1569 longest = NULL; 1570 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 1571 if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 1572 &sdst->sin6_addr) 1573 && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) { 1574 if (!longest 1575 || longest->rrt_info.rip6_plen < 1576 rrt->rrt_info.rip6_plen) { 1577 longest = rrt; 1578 } 1579 } 1580 } 1581 rrt = longest; 1582 if (!rrt) { 1583 trace(1, "\tno matching interface route found\n"); 1584 return -1; 1585 } 1586 gw = &in6addr_loopback; 1587 prefix = rrt->rrt_info.rip6_plen; 1588 } else { 1589 trace(1, "\tunsupported af: (gw=%d, mask=%d)\n", 1590 sgw->sin6_family, smask->sin6_family); 1591 return -1; 1592 } 1593 1594 trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix); 1595 trace(1, "gw %s\n", inet6_n2p(gw)); 1596 t_lifetime = time(NULL) - RIP_LIFETIME; 1597 /* age route for interface address */ 1598 memset(&ni6, 0, sizeof(ni6)); 1599 ni6.rip6_dest = *dst; 1600 ni6.rip6_plen = prefix; 1601 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 1602 trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest), 1603 ni6.rip6_plen); 1604 if (!rrt && (rrt = rtsearch(&ni6)) == NULL) { 1605 trace(1, "\tno route found\n"); 1606 return -1; 1607 } 1608 if ((rrt->rrt_flags & RTF_STATIC) == 0) { 1609 trace(1, "\tyou can delete static routes only\n"); 1610 } else if (memcmp(&rrt->rrt_gw, gw, sizeof(rrt->rrt_gw)) != 0) { 1611 trace(1, "\tgw mismatch: %s <-> ", 1612 inet6_n2p(&rrt->rrt_gw)); 1613 trace(1, "%s\n", inet6_n2p(gw)); 1614 } else { 1615 trace(1, "\troute found, age it\n"); 1616 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1617 rrt->rrt_t = t_lifetime; 1618 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 1619 } 1620 } 1621 return 0; 1622} 1623 1624/* 1625 * remove specified address from internal interface/routing table. 1626 */ 1627int 1628rt_deladdr(ifcp, sifa, smask) 1629 struct ifc *ifcp; 1630 const struct sockaddr_in6 *sifa; 1631 const struct sockaddr_in6 *smask; 1632{ 1633 const struct in6_addr *addr = NULL; 1634 int prefix; 1635 struct ifac *ifa = NULL; 1636 struct netinfo6 ni6; 1637 struct riprt *rrt = NULL; 1638 time_t t_lifetime; 1639 int updated = 0; 1640 1641 if (sifa->sin6_family != AF_INET6 || smask->sin6_family != AF_INET6) { 1642 trace(1, "\tother AF, ignored\n"); 1643 return -1; 1644 } 1645 addr = &sifa->sin6_addr; 1646 prefix = mask2len(&smask->sin6_addr, 16); 1647 1648 trace(1, "\tdeleting %s/%d from %s\n", 1649 inet6_n2p(addr), prefix, ifcp->ifc_name); 1650 ifa = ifa_match(ifcp, addr, prefix); 1651 if (!ifa) { 1652 trace(1, "\tno matching ifa found for %s/%d on %s\n", 1653 inet6_n2p(addr), prefix, ifcp->ifc_name); 1654 return -1; 1655 } 1656 if (ifa->ifa_conf != ifcp) { 1657 trace(1, "\taddress table corrupt: back pointer does not match " 1658 "(%s != %s)\n", 1659 ifcp->ifc_name, ifa->ifa_conf->ifc_name); 1660 return -1; 1661 } 1662 /* remove ifa from interface */ 1663 if (ifcp->ifc_addr == ifa) 1664 ifcp->ifc_addr = ifa->ifa_next; 1665 else { 1666 struct ifac *p; 1667 for (p = ifcp->ifc_addr; p; p = p->ifa_next) { 1668 if (p->ifa_next == ifa) { 1669 p->ifa_next = ifa->ifa_next; 1670 break; 1671 } 1672 } 1673 } 1674 ifa->ifa_next = NULL; 1675 ifa->ifa_conf = NULL; 1676 t_lifetime = time(NULL) - RIP_LIFETIME; 1677 /* age route for interface address */ 1678 memset(&ni6, 0, sizeof(ni6)); 1679 ni6.rip6_dest = ifa->ifa_addr; 1680 ni6.rip6_plen = ifa->ifa_plen; 1681 applyplen(&ni6.rip6_dest, ni6.rip6_plen); 1682 trace(1, "\tfind interface route %s/%d on %d\n", 1683 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index); 1684 if ((rrt = rtsearch(&ni6)) != NULL) { 1685 struct in6_addr none; 1686 memset(&none, 0, sizeof(none)); 1687 if (rrt->rrt_index == ifcp->ifc_index 1688 && memcmp(&rrt->rrt_gw, &none, sizeof(rrt->rrt_gw)) == 0) { 1689 trace(1, "\troute found, age it\n"); 1690 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1691 rrt->rrt_t = t_lifetime; 1692 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6; 1693 } 1694 updated++; 1695 } else { 1696 trace(1, "\tnon-interface route found: %s/%d on %d\n", 1697 inet6_n2p(&rrt->rrt_info.rip6_dest), 1698 rrt->rrt_info.rip6_plen, 1699 rrt->rrt_index); 1700 } 1701 } else 1702 trace(1, "\tno interface route found\n"); 1703 /* age route for p2p destination */ 1704 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1705 memset(&ni6, 0, sizeof(ni6)); 1706 ni6.rip6_dest = ifa->ifa_raddr; 1707 ni6.rip6_plen = 128; 1708 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ 1709 trace(1, "\tfind p2p route %s/%d on %d\n", 1710 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, 1711 ifcp->ifc_index); 1712 if ((rrt = rtsearch(&ni6)) != NULL) { 1713 if (rrt->rrt_index == ifcp->ifc_index 1714 && memcmp(&rrt->rrt_gw, &ifa->ifa_addr, 1715 sizeof(rrt->rrt_gw)) == 0) { 1716 trace(1, "\troute found, age it\n"); 1717 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { 1718 rrt->rrt_t = t_lifetime; 1719 rrt->rrt_info.rip6_metric = 1720 HOPCNT_INFINITY6; 1721 updated++; 1722 } 1723 } else { 1724 trace(1, "\tnon-p2p route found: %s/%d on %d\n", 1725 inet6_n2p(&rrt->rrt_info.rip6_dest), 1726 rrt->rrt_info.rip6_plen, 1727 rrt->rrt_index); 1728 } 1729 } else 1730 trace(1, "\tno p2p route found\n"); 1731 } 1732 return updated ? 0 : -1; 1733} 1734 1735/* 1736 * Get each interface address and put those interface routes to the route 1737 * list. 1738 */ 1739void 1740ifrt(ifcp, again) 1741 struct ifc *ifcp; 1742 int again; 1743{ 1744 struct ifac *ifa; 1745 struct riprt *rrt; 1746 struct netinfo6 *np; 1747 1748 if (ifcp->ifc_flags & IFF_LOOPBACK) 1749 return; /* ignore loopback */ 1750 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 1751 if (IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) 1752 continue; /* don't advertise link local addr */ 1753 if ((rrt = MALLOC(struct riprt)) == NULL) 1754 fatal("malloc: struct riprt"); 1755 rrt->rrt_same = NULL; 1756 rrt->rrt_index = ifcp->ifc_index; 1757 rrt->rrt_t = 0; /* don't age */ 1758 rrt->rrt_info.rip6_dest = ifa->ifa_addr; 1759 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 1760 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; 1761 rrt->rrt_info.rip6_plen = ifa->ifa_plen; 1762 applyplen(&rrt->rrt_info.rip6_dest, ifa->ifa_plen); 1763 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 1764 np = &rrt->rrt_info; 1765 if (rtsearch(np) == NULL) { 1766 /* Attach the route to the list */ 1767 rrt->rrt_next = riprt; 1768 riprt = rrt; 1769 } else { 1770 /* Already found */ 1771 if (!again) { 1772 trace(1, "route: %s/%d: already registered\n", 1773 inet6_n2p(&np->rip6_dest), 1774 np->rip6_plen); 1775 } 1776 free(rrt); 1777 } 1778 1779 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 1780 if ((rrt = MALLOC(struct riprt)) == NULL) 1781 fatal("malloc: struct riprt"); 1782 rrt->rrt_same = NULL; 1783 rrt->rrt_index = ifcp->ifc_index; 1784 rrt->rrt_t = 0; /* Don't age */ 1785 rrt->rrt_info.rip6_dest = ifa->ifa_raddr; 1786 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 1787 rrt->rrt_info.rip6_metric = 1; 1788 rrt->rrt_info.rip6_plen = 128; 1789 rrt->rrt_gw = ifa->ifa_addr; 1790 rrt->rrt_flags |= RTF_NOADVERTISE; 1791 np = &rrt->rrt_info; 1792 if (rtsearch(np) == NULL) { 1793 /* Attach the route to the list */ 1794 rrt->rrt_next = riprt; 1795 riprt = rrt; 1796 } else { 1797 /* Already found */ 1798 if (!again) { 1799 trace(1, "route: %s/%d: already registered\n", 1800 inet6_n2p(&np->rip6_dest), 1801 np->rip6_plen); 1802 } 1803 free(rrt); 1804 } 1805 } 1806 } 1807} 1808 1809int 1810getifmtu(ifindex) 1811 int ifindex; 1812{ 1813 int mib[6]; 1814 char *buf; 1815 size_t msize; 1816 struct if_msghdr *ifm; 1817 int mtu; 1818 1819 mib[0] = CTL_NET; 1820 mib[1] = PF_ROUTE; 1821 mib[2] = 0; 1822 mib[3] = AF_INET6; 1823 mib[4] = NET_RT_IFLIST; 1824 mib[5] = ifindex; 1825 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) 1826 fatal("sysctl estimate NET_RT_IFLIST"); 1827 if ((buf = malloc(msize)) == NULL) 1828 fatal("malloc"); 1829 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) 1830 fatal("sysctl NET_RT_IFLIST"); 1831 ifm = (struct if_msghdr *)buf; 1832 mtu = ifm->ifm_data.ifi_mtu; 1833#ifdef __FREEBSD__ 1834 if (ifindex != ifm->ifm_index) 1835 fatal("ifindex does not match with ifm_index"); 1836#endif /* __FREEBSD__ */ 1837 free(buf); 1838 return mtu; 1839} 1840 1841const char * 1842rttypes(rtm) 1843 struct rt_msghdr *rtm; 1844{ 1845#define RTTYPE(s, f) if (rtm->rtm_type == (f)) return (s) 1846 RTTYPE("ADD", RTM_ADD); 1847 RTTYPE("DELETE", RTM_DELETE); 1848 RTTYPE("CHANGE", RTM_CHANGE); 1849 RTTYPE("GET", RTM_GET); 1850 RTTYPE("LOSING", RTM_LOSING); 1851 RTTYPE("REDIRECT", RTM_REDIRECT); 1852 RTTYPE("MISS", RTM_MISS); 1853 RTTYPE("LOCK", RTM_LOCK); 1854 RTTYPE("OLDADD", RTM_OLDADD); 1855 RTTYPE("OLDDEL", RTM_OLDDEL); 1856 RTTYPE("RESOLVE", RTM_RESOLVE); 1857 RTTYPE("NEWADDR", RTM_NEWADDR); 1858 RTTYPE("DELADDR", RTM_DELADDR); 1859 RTTYPE("IFINFO", RTM_IFINFO); 1860#undef RTTYPE 1861 return NULL; 1862} 1863 1864const char * 1865rtflags(rtm) 1866 struct rt_msghdr *rtm; 1867{ 1868 static char buf[BUFSIZ]; 1869 1870 strcpy(buf, ""); 1871#define RTFLAG(s, f) if (rtm->rtm_flags & (f)) strcat(buf, (s)) 1872 RTFLAG("U", RTF_UP); 1873 RTFLAG("G", RTF_GATEWAY); 1874 RTFLAG("H", RTF_HOST); 1875 RTFLAG("R", RTF_REJECT); 1876 RTFLAG("D", RTF_DYNAMIC); 1877 RTFLAG("M", RTF_MODIFIED); 1878 RTFLAG("d", RTF_DONE); 1879#ifdef RTF_MASK 1880 RTFLAG("m", RTF_MASK); 1881#endif 1882 RTFLAG("C", RTF_CLONING); 1883 RTFLAG("X", RTF_XRESOLVE); 1884 RTFLAG("L", RTF_LLINFO); 1885 RTFLAG("S", RTF_STATIC); 1886 RTFLAG("B", RTF_BLACKHOLE); 1887 RTFLAG("2", RTF_PROTO2); 1888 RTFLAG("1", RTF_PROTO1); 1889#undef RTFLAG 1890 return buf; 1891} 1892 1893const char * 1894ifflags(flags) 1895 int flags; 1896{ 1897 static char buf[BUFSIZ]; 1898 1899 strcpy(buf, ""); 1900#define IFFLAG(s, f) \ 1901 if (flags & f) { if (buf[0]) strcat(buf, ","); strcat(buf, s); } 1902 IFFLAG("UP", IFF_UP); 1903 IFFLAG("BROADCAST", IFF_BROADCAST); 1904 IFFLAG("DEBUG", IFF_DEBUG); 1905 IFFLAG("LOOPBACK", IFF_LOOPBACK); 1906 IFFLAG("POINTOPOINT", IFF_POINTOPOINT); 1907#ifdef IFF_NOTRAILERS 1908 IFFLAG("NOTRAILERS", IFF_NOTRAILERS); 1909#endif 1910 IFFLAG("RUNNING", IFF_RUNNING); 1911 IFFLAG("NOARP", IFF_NOARP); 1912 IFFLAG("PROMISC", IFF_PROMISC); 1913 IFFLAG("ALLMULTI", IFF_ALLMULTI); 1914 IFFLAG("OACTIVE", IFF_OACTIVE); 1915 IFFLAG("SIMPLEX", IFF_SIMPLEX); 1916 IFFLAG("LINK0", IFF_LINK0); 1917 IFFLAG("LINK1", IFF_LINK1); 1918 IFFLAG("LINK2", IFF_LINK2); 1919 IFFLAG("MULTICAST", IFF_MULTICAST); 1920#undef IFFLAG 1921 return buf; 1922} 1923 1924void 1925krtread(again) 1926 int again; 1927{ 1928 int mib[6]; 1929 size_t msize; 1930 char *buf, *p, *lim; 1931 struct rt_msghdr *rtm; 1932 int retry; 1933 const char *errmsg; 1934 1935 retry = 0; 1936 buf = NULL; 1937 mib[0] = CTL_NET; 1938 mib[1] = PF_ROUTE; 1939 mib[2] = 0; 1940 mib[3] = AF_INET6; /* Address family */ 1941 mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */ 1942 mib[5] = 0; /* No flags */ 1943 do { 1944 retry++; 1945 errmsg = NULL; 1946 if (buf) 1947 free(buf); 1948 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) { 1949 errmsg = "sysctl estimate"; 1950 continue; 1951 } 1952 if ((buf = malloc(msize)) == NULL) { 1953 errmsg = "malloc"; 1954 continue; 1955 } 1956 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) { 1957 errmsg = "sysctl NET_RT_DUMP"; 1958 continue; 1959 } 1960 } while (retry < 5 && errmsg != NULL); 1961 if (errmsg) 1962 fatal("%s (with %d retries, msize=%d)", errmsg, retry, msize); 1963 else if (1 < retry) 1964 syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry); 1965 1966 lim = buf + msize; 1967 for (p = buf; p < lim; p += rtm->rtm_msglen) { 1968 rtm = (struct rt_msghdr *)p; 1969 rt_entry(rtm, again); 1970 } 1971 free(buf); 1972} 1973 1974void 1975rt_entry(rtm, again) 1976 struct rt_msghdr *rtm; 1977 int again; 1978{ 1979 struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask; 1980 struct sockaddr_in6 *sin6_genmask, *sin6_ifp; 1981 char *rtmp, *ifname = NULL; 1982 char buf[BUFSIZ]; 1983 struct riprt *rrt; 1984 struct netinfo6 *np; 1985 int s; 1986 1987 sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = 0; 1988 if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags & 1989 (RTF_CLONING|RTF_XRESOLVE|RTF_LLINFO|RTF_BLACKHOLE)) 1990 return; /* not interested in the link route */ 1991 rtmp = (char *)(rtm + 1); 1992 /* Destination */ 1993 if ((rtm->rtm_addrs & RTA_DST) == 0) 1994 return; /* ignore routes without destination address */ 1995 sin6_dst = (struct sockaddr_in6 *)rtmp; 1996 rtmp += sin6_dst->sin6_len; 1997 if (rtm->rtm_addrs & RTA_GATEWAY) { 1998 sin6_gw = (struct sockaddr_in6 *)rtmp; 1999 rtmp += ROUNDUP(sin6_gw->sin6_len); 2000 } 2001 if (rtm->rtm_addrs & RTA_NETMASK) { 2002 sin6_mask = (struct sockaddr_in6 *)rtmp; 2003 rtmp += ROUNDUP(sin6_mask->sin6_len); 2004 } 2005 if (rtm->rtm_addrs & RTA_GENMASK) { 2006 sin6_genmask = (struct sockaddr_in6 *)rtmp; 2007 rtmp += ROUNDUP(sin6_genmask->sin6_len); 2008 } 2009 if (rtm->rtm_addrs & RTA_IFP) { 2010 sin6_ifp = (struct sockaddr_in6 *)rtmp; 2011 rtmp += ROUNDUP(sin6_ifp->sin6_len); 2012 } 2013 2014 /* Destination */ 2015 if (sin6_dst->sin6_family != AF_INET6) 2016 return; 2017 if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr)) 2018 return; /* Link-local */ 2019 if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback)) 2020 return; /* Loopback */ 2021 if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr)) 2022 return; 2023 2024 if ((rrt = MALLOC(struct riprt)) == NULL) 2025 fatal("malloc: struct riprt"); 2026 np = &rrt->rrt_info; 2027 rrt->rrt_same = NULL; 2028 rrt->rrt_t = time(NULL); 2029 if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC)) 2030 rrt->rrt_t = 0; /* Don't age static routes */ 2031#if 0 2032 np->rip6_tag = htons(routetag & 0xffff); 2033#else 2034 np->rip6_tag = 0; 2035#endif 2036 np->rip6_metric = rtm->rtm_rmx.rmx_hopcount; 2037 if (np->rip6_metric < 1) 2038 np->rip6_metric = 1; 2039 rrt->rrt_flags = rtm->rtm_flags; 2040 np->rip6_dest = sin6_dst->sin6_addr; 2041 2042 /* Mask or plen */ 2043 if (rtm->rtm_flags & RTF_HOST) 2044 np->rip6_plen = 128; /* Host route */ 2045 else if (sin6_mask) { 2046 np->rip6_plen = mask2len(&sin6_mask->sin6_addr, 2047 sin6_mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr)); 2048 } else 2049 np->rip6_plen = 0; 2050 2051 if (rtsearch(np)) { 2052 /* Already found */ 2053 if (!again) { 2054 trace(1, "route: %s/%d flags %s: already registered\n", 2055 inet6_n2p(&np->rip6_dest), np->rip6_plen, 2056 rtflags(rtm)); 2057 } 2058 free(rrt); 2059 return; 2060 } 2061 /* Gateway */ 2062 if (!sin6_gw) 2063 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2064 else { 2065 if (sin6_gw->sin6_family == AF_INET6) 2066 rrt->rrt_gw = sin6_gw->sin6_addr; 2067 else if (sin6_gw->sin6_family == AF_LINK) { 2068 /* XXX in case ppp link? */ 2069 rrt->rrt_gw = in6addr_loopback; 2070 } else 2071 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); 2072 } 2073 trace(1, "route: %s/%d flags %s", 2074 inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm)); 2075 trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw)); 2076 2077 /* Interface */ 2078 s = rtm->rtm_index; 2079 if (s < nindex2ifc && index2ifc[s]) 2080 ifname = index2ifc[s]->ifc_name; 2081 else { 2082 trace(1, " not configured\n"); 2083 return; 2084 } 2085 trace(1, " if %s sock %d\n", ifname, s); 2086 rrt->rrt_index = s; 2087 2088 /* Check gateway */ 2089 if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) && 2090 !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw) 2091#ifdef __FreeBSD__ 2092 && (rrt->rrt_flags & RTF_LOCAL) == 0 2093#endif 2094 ) { 2095 inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest, 2096 buf, sizeof(buf)); 2097 trace(0, "***** Gateway %s is not a link-local address.\n", 2098 inet6_n2p(&rrt->rrt_gw)); 2099 trace(0, "***** dest(%s) if(%s) -- Not optimized.\n", 2100 buf, ifname); 2101 rrt->rrt_flags |= RTF_NH_NOT_LLADDR; 2102 } 2103 2104 /* Put it to the route list */ 2105 rrt->rrt_next = riprt; 2106 riprt = rrt; 2107} 2108 2109int 2110addroute(rrt, gw, ifcp) 2111 struct riprt *rrt; 2112 const struct in6_addr *gw; 2113 struct ifc *ifcp; 2114{ 2115 struct netinfo6 *np; 2116 u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ]; 2117 struct rt_msghdr *rtm; 2118 struct sockaddr_in6 *sin; 2119 int len; 2120 2121 np = &rrt->rrt_info; 2122 inet_ntop(AF_INET6, (void *)gw, (char *)buf1, sizeof(buf1)); 2123 inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2)); 2124 tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n", 2125 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 2126 np->rip6_metric - 1, buf2); 2127 if (rtlog) 2128 fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(), 2129 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, 2130 np->rip6_metric - 1, buf2); 2131 if (nflag) 2132 return 0; 2133 2134 memset(buf, 0, sizeof(buf)); 2135 rtm = (struct rt_msghdr *)buf; 2136 rtm->rtm_type = RTM_ADD; 2137 rtm->rtm_version = RTM_VERSION; 2138 rtm->rtm_seq = ++seq; 2139 rtm->rtm_pid = pid; 2140 rtm->rtm_flags = rrt->rrt_flags & RTF_ROUTE_H; 2141 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 2142 rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1; 2143 rtm->rtm_inits = RTV_HOPCOUNT; 2144 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2145 /* Destination */ 2146 sin->sin6_len = sizeof(struct sockaddr_in6); 2147 sin->sin6_family = AF_INET6; 2148 sin->sin6_addr = np->rip6_dest; 2149 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2150 /* Gateway */ 2151 sin->sin6_len = sizeof(struct sockaddr_in6); 2152 sin->sin6_family = AF_INET6; 2153 sin->sin6_addr = *gw; 2154 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2155 /* Netmask */ 2156 sin->sin6_len = sizeof(struct sockaddr_in6); 2157 sin->sin6_family = AF_INET6; 2158 sin->sin6_addr = *(plen2mask(np->rip6_plen)); 2159 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2160 2161 len = (char *)sin - (char *)buf; 2162 rtm->rtm_msglen = len; 2163 if (write(rtsock, buf, len) > 0) 2164 return 0; 2165 2166 if (errno == EEXIST) { 2167 trace(0, "ADD: Route already exists %s/%d gw %s\n", 2168 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 2169 if (rtlog) 2170 fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n", 2171 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); 2172 } else { 2173 trace(0, "Can not write to rtsock (addroute): %s\n", 2174 strerror(errno)); 2175 if (rtlog) 2176 fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2177 strerror(errno)); 2178 } 2179 return -1; 2180} 2181 2182int 2183delroute(np, gw) 2184 struct netinfo6 *np; 2185 struct in6_addr *gw; 2186{ 2187 u_char buf[BUFSIZ], buf2[BUFSIZ]; 2188 struct rt_msghdr *rtm; 2189 struct sockaddr_in6 *sin; 2190 int len; 2191 2192 inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2)); 2193 tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest), 2194 np->rip6_plen, buf2); 2195 if (rtlog) 2196 fprintf(rtlog, "%s: DEL: %s/%d gw %s\n", 2197 hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2198 if (nflag) 2199 return 0; 2200 2201 memset(buf, 0, sizeof(buf)); 2202 rtm = (struct rt_msghdr *)buf; 2203 rtm->rtm_type = RTM_DELETE; 2204 rtm->rtm_version = RTM_VERSION; 2205 rtm->rtm_seq = ++seq; 2206 rtm->rtm_pid = pid; 2207 rtm->rtm_flags = RTF_UP | RTF_GATEWAY; 2208 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 2209 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2210 /* Destination */ 2211 sin->sin6_len = sizeof(struct sockaddr_in6); 2212 sin->sin6_family = AF_INET6; 2213 sin->sin6_addr = np->rip6_dest; 2214 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2215 /* Gateway */ 2216 sin->sin6_len = sizeof(struct sockaddr_in6); 2217 sin->sin6_family = AF_INET6; 2218 sin->sin6_addr = *gw; 2219 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2220 /* Netmask */ 2221 sin->sin6_len = sizeof(struct sockaddr_in6); 2222 sin->sin6_family = AF_INET6; 2223 sin->sin6_addr = *(plen2mask(np->rip6_plen)); 2224 sin = (struct sockaddr_in6 *)((char *)sin + ROUNDUP(sin->sin6_len)); 2225 2226 len = (char *)sin - (char *)buf; 2227 rtm->rtm_msglen = len; 2228 if (write(rtsock, buf, len) >= 0) 2229 return 0; 2230 2231 if (errno == ESRCH) { 2232 trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n", 2233 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2234 if (rtlog) 2235 fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n", 2236 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); 2237 } else { 2238 trace(0, "Can not write to rtsock (delroute): %s\n", 2239 strerror(errno)); 2240 if (rtlog) 2241 fprintf(rtlog, "\tCan not write to rtsock: %s\n", 2242 strerror(errno)); 2243 } 2244 return -1; 2245} 2246 2247struct in6_addr * 2248getroute(np, gw) 2249 struct netinfo6 *np; 2250 struct in6_addr *gw; 2251{ 2252 u_char buf[BUFSIZ]; 2253 u_long myseq; 2254 int len; 2255 struct rt_msghdr *rtm; 2256 struct sockaddr_in6 *sin; 2257 2258 rtm = (struct rt_msghdr *)buf; 2259 len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6); 2260 memset(rtm, 0, len); 2261 rtm->rtm_type = RTM_GET; 2262 rtm->rtm_version = RTM_VERSION; 2263 myseq = ++seq; 2264 rtm->rtm_seq = myseq; 2265 rtm->rtm_addrs = RTA_DST; 2266 rtm->rtm_msglen = len; 2267 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2268 sin->sin6_len = sizeof(struct sockaddr_in6); 2269 sin->sin6_family = AF_INET6; 2270 sin->sin6_addr = np->rip6_dest; 2271 if (write(rtsock, buf, len) < 0) { 2272 if (errno == ESRCH) /* No such route found */ 2273 return NULL; 2274 perror("write to rtsock"); 2275 exit(-1); 2276 } 2277 do { 2278 if ((len = read(rtsock, buf, sizeof(buf))) < 0) { 2279 perror("read from rtsock"); 2280 exit(-1); 2281 } 2282 rtm = (struct rt_msghdr *)buf; 2283 } while (rtm->rtm_seq != myseq || rtm->rtm_pid != pid); 2284 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; 2285 if (rtm->rtm_addrs & RTA_DST) { 2286 sin = (struct sockaddr_in6 *) 2287 ((char *)sin + ROUNDUP(sin->sin6_len)); 2288 } 2289 if (rtm->rtm_addrs & RTA_GATEWAY) { 2290 *gw = sin->sin6_addr; 2291 return gw; 2292 } 2293 return NULL; 2294} 2295 2296const char * 2297inet6_n2p(p) 2298 const struct in6_addr *p; 2299{ 2300 static char buf[BUFSIZ]; 2301 2302 return inet_ntop(AF_INET6, (void *)p, buf, sizeof(buf)); 2303} 2304 2305void 2306ifrtdump(sig) 2307 int sig; 2308{ 2309 2310 ifdump(sig); 2311 rtdump(sig); 2312} 2313 2314void 2315ifdump(sig) 2316 int sig; 2317{ 2318 struct ifc *ifcp; 2319 FILE *dump; 2320 int i; 2321 2322 if (sig == 0) 2323 dump = stderr; 2324 else 2325 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 2326 dump = stderr; 2327 2328 fprintf(dump, "%s: Interface Table Dump\n", hms()); 2329 fprintf(dump, " Number of interfaces: %d\n", nifc); 2330 for (i = 0; i < 2; i++) { 2331 fprintf(dump, " %sadvertising interfaces:\n", i ? "non-" : ""); 2332 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 2333 if (i == 0) { 2334 if ((ifcp->ifc_flags & IFF_UP) == 0) 2335 continue; 2336 if (iff_find(ifcp, 'N') != NULL) 2337 continue; 2338 } else { 2339 if (ifcp->ifc_flags & IFF_UP) 2340 continue; 2341 } 2342 ifdump0(dump, ifcp); 2343 } 2344 } 2345 fprintf(dump, "\n"); 2346 if (dump != stderr) 2347 fclose(dump); 2348} 2349 2350void 2351ifdump0(dump, ifcp) 2352 FILE *dump; 2353 const struct ifc *ifcp; 2354{ 2355 struct ifac *ifa; 2356 struct iff *iffp; 2357 char buf[BUFSIZ]; 2358 const char *ft; 2359 int addr; 2360 2361 fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n", 2362 ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags), 2363 inet6_n2p(&ifcp->ifc_mylladdr), 2364 ifcp->ifc_mtu, ifcp->ifc_metric); 2365 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 2366 if (ifcp->ifc_flags & IFF_POINTOPOINT) { 2367 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, 2368 buf, sizeof(buf)); 2369 fprintf(dump, "\t%s/%d -- %s\n", 2370 inet6_n2p(&ifa->ifa_addr), 2371 ifa->ifa_plen, buf); 2372 } else { 2373 fprintf(dump, "\t%s/%d\n", 2374 inet6_n2p(&ifa->ifa_addr), 2375 ifa->ifa_plen); 2376 } 2377 } 2378 if (ifcp->ifc_filter) { 2379 fprintf(dump, "\tFilter:"); 2380 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 2381 addr = 0; 2382 switch (iffp->iff_type) { 2383 case 'A': 2384 ft = "Aggregate"; addr++; break; 2385 case 'N': 2386 ft = "No-advertise"; break; 2387 case 'O': 2388 ft = "Advertise-only"; addr++; break; 2389 case 'T': 2390 ft = "Default-only"; break; 2391 case 'L': 2392 ft = "Listen-only"; addr++; break; 2393 default: 2394 snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type); 2395 ft = buf; 2396 addr++; 2397 break; 2398 } 2399 fprintf(dump, " %s", ft); 2400 if (addr) { 2401 fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr), 2402 iffp->iff_plen); 2403 } 2404 } 2405 fprintf(dump, "\n"); 2406 } 2407} 2408 2409void 2410rtdump(sig) 2411 int sig; 2412{ 2413 struct riprt *rrt; 2414 char buf[BUFSIZ]; 2415 FILE *dump; 2416 time_t t, age; 2417 2418 if (sig == 0) 2419 dump = stderr; 2420 else 2421 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL) 2422 dump = stderr; 2423 2424 t = time(NULL); 2425 fprintf(dump, "\n%s: Routing Table Dump\n", hms()); 2426 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 2427 if (rrt->rrt_t == 0) 2428 age = 0; 2429 else 2430 age = t - rrt->rrt_t; 2431 inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest, 2432 buf, sizeof(buf)); 2433 fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)", 2434 buf, rrt->rrt_info.rip6_plen, rrt->rrt_index, 2435 index2ifc[rrt->rrt_index]->ifc_name, 2436 inet6_n2p(&rrt->rrt_gw), 2437 rrt->rrt_info.rip6_metric, (long)age); 2438 if (rrt->rrt_info.rip6_tag) { 2439 fprintf(dump, " tag(0x%04x)", 2440 ntohs(rrt->rrt_info.rip6_tag) & 0xffff); 2441 } 2442 if (rrt->rrt_flags & RTF_NH_NOT_LLADDR) 2443 fprintf(dump, " NOT-LL"); 2444 if (rrt->rrt_flags & RTF_NOADVERTISE) 2445 fprintf(dump, " NO-ADV"); 2446 fprintf(dump, "\n"); 2447 } 2448 fprintf(dump, "\n"); 2449 if (dump != stderr) 2450 fclose(dump); 2451} 2452 2453/* 2454 * Parse the -A (and -O) options and put corresponding filter object to the 2455 * specified interface structures. Each of the -A/O option has the following 2456 * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate) 2457 * -O 5f09:c400::/32,ef0,ef1 (only when match) 2458 */ 2459void 2460filterconfig() 2461{ 2462 int i; 2463 char *p, *ap, *iflp, *ifname; 2464 struct iff ftmp, *iff_obj; 2465 struct ifc *ifcp; 2466 struct riprt *rrt; 2467 struct in6_addr gw; 2468 2469 for (i = 0; i < nfilter; i++) { 2470 ap = filter[i]; 2471 iflp = NULL; 2472 ifcp = NULL; 2473 if (filtertype[i] == 'N' || filtertype[i] == 'T') { 2474 iflp = ap; 2475 goto ifonly; 2476 } 2477 if ((p = index(ap, ',')) != NULL) { 2478 *p++ = '\0'; 2479 iflp = p; 2480 } 2481 if ((p = index(ap, '/')) == NULL) 2482 fatal("no prefixlen specified for '%s'", ap); 2483 *p++ = '\0'; 2484 if (inet_pton(AF_INET6, ap, &ftmp.iff_addr) != 1) 2485 fatal("invalid prefix specified for '%s'", ap); 2486 ftmp.iff_plen = atoi(p); 2487 ftmp.iff_next = NULL; 2488 applyplen(&ftmp.iff_addr, ftmp.iff_plen); 2489ifonly: 2490 ftmp.iff_type = filtertype[i]; 2491 if (iflp == NULL || *iflp == '\0') 2492 fatal("no interface specified for '%s'", ap); 2493 /* parse the interface listing portion */ 2494 while (iflp) { 2495 ifname = iflp; 2496 if ((iflp = index(iflp, ',')) != NULL) 2497 *iflp++ = '\0'; 2498 ifcp = ifc_find(ifname); 2499 if (ifcp == NULL) 2500 fatal("no interface %s exists", ifname); 2501 iff_obj = (struct iff *)malloc(sizeof(struct iff)); 2502 if (iff_obj == NULL) 2503 fatal("malloc of iff_obj"); 2504 memcpy((void *)iff_obj, (void *)&ftmp, 2505 sizeof(struct iff)); 2506 /* link it to the interface filter */ 2507 iff_obj->iff_next = ifcp->ifc_filter; 2508 ifcp->ifc_filter = iff_obj; 2509 } 2510 if (filtertype[i] != 'A') 2511 continue; 2512 /* put the aggregate to the kernel routing table */ 2513 rrt = (struct riprt *)malloc(sizeof(struct riprt)); 2514 if (rrt == NULL) 2515 fatal("malloc: rrt"); 2516 memset(rrt, 0, sizeof(struct riprt)); 2517 rrt->rrt_info.rip6_dest = ftmp.iff_addr; 2518 rrt->rrt_info.rip6_plen = ftmp.iff_plen; 2519 rrt->rrt_info.rip6_metric = 1; 2520 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff); 2521 rrt->rrt_gw = in6addr_loopback; 2522 rrt->rrt_flags = RTF_UP | RTF_REJECT | RTF_AGGREGATE; 2523 rrt->rrt_t = 0; 2524 rrt->rrt_index = loopifindex; 2525 /* Put the route to the list */ 2526 rrt->rrt_next = riprt; 2527 riprt = rrt; 2528 trace(1, "Aggregate: %s/%d for %s\n", 2529 inet6_n2p(&ftmp.iff_addr), ftmp.iff_plen, 2530 ifcp->ifc_name); 2531 /* Add this route to the kernel */ 2532 if (nflag) /* do not modify kernel routing table */ 2533 continue; 2534 if (getroute(&rrt->rrt_info, &gw)) { 2535 /* 2536 * When the address has already been registered in the 2537 * kernel routing table, it should be removed 2538 */ 2539 delroute(&rrt->rrt_info, &gw); 2540 } 2541 addroute(rrt, &in6addr_loopback, loopifcp); 2542 } 2543} 2544 2545/***************** utility functions *****************/ 2546 2547/* 2548 * Returns a pointer to ifac whose address and prefix length matches 2549 * with the address and prefix length specified in the arguments. 2550 */ 2551struct ifac * 2552ifa_match(ifcp, ia, plen) 2553 const struct ifc *ifcp; 2554 const struct in6_addr *ia; 2555 int plen; 2556{ 2557 struct ifac *ifa; 2558 2559 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { 2560 if (IN6_ARE_ADDR_EQUAL(&ifa->ifa_addr, ia) && 2561 ifa->ifa_plen == plen) 2562 break; 2563 } 2564 return ifa; 2565} 2566 2567/* 2568 * Return a pointer to riprt structure whose address and prefix length 2569 * matches with the address and prefix length found in the argument. 2570 * Note: This is not a rtalloc(). Therefore exact match is necessary. 2571 */ 2572 2573struct riprt * 2574rtsearch(np) 2575 struct netinfo6 *np; 2576{ 2577 struct riprt *rrt; 2578 2579 for (rrt = riprt; rrt; rrt = rrt->rrt_next) { 2580 if (rrt->rrt_info.rip6_plen == np->rip6_plen && 2581 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest, 2582 &np->rip6_dest)) 2583 return rrt; 2584 } 2585 return 0; 2586} 2587 2588int 2589mask2len(addr, lenlim) 2590 const struct in6_addr *addr; 2591 int lenlim; 2592{ 2593 int i = 0, j; 2594 u_char *p = (u_char *)addr; 2595 2596 for (j = 0; j < lenlim; j++, p++) { 2597 if (*p != 0xff) 2598 break; 2599 i += 8; 2600 } 2601 if (j < lenlim) { 2602 switch (*p) { 2603#define MASKLEN(m, l) case m: i += l; break 2604 MASKLEN(0xfe, 7); 2605 MASKLEN(0xfc, 6); 2606 MASKLEN(0xf8, 5); 2607 MASKLEN(0xf0, 4); 2608 MASKLEN(0xe0, 3); 2609 MASKLEN(0xc0, 2); 2610 MASKLEN(0x80, 1); 2611#undef MASKLEN 2612 } 2613 } 2614 return i; 2615} 2616 2617void 2618applymask(addr, mask) 2619 struct in6_addr *addr, *mask; 2620{ 2621 int i; 2622 u_long *p, *q; 2623 2624 p = (u_long *)addr; q = (u_long *)mask; 2625 for (i = 0; i < 4; i++) 2626 *p++ &= *q++; 2627} 2628 2629static const u_char plent[8] = { 2630 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe 2631}; 2632 2633void 2634applyplen(ia, plen) 2635 struct in6_addr *ia; 2636 int plen; 2637{ 2638 u_char *p; 2639 int i; 2640 2641 p = ia->s6_addr; 2642 for (i = 0; i < 16; i++) { 2643 if (plen <= 0) 2644 *p = 0; 2645 else if (plen < 8) 2646 *p &= plent[plen]; 2647 p++, plen -= 8; 2648 } 2649} 2650 2651static const int pl2m[9] = { 2652 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff 2653}; 2654 2655struct in6_addr * 2656plen2mask(n) 2657 int n; 2658{ 2659 static struct in6_addr ia; 2660 u_char *p; 2661 int i; 2662 2663 memset(&ia, 0, sizeof(struct in6_addr)); 2664 p = (u_char *)&ia; 2665 for (i = 0; i < 16; i++, p++, n -= 8) { 2666 if (n >= 8) { 2667 *p = 0xff; 2668 continue; 2669 } 2670 *p = pl2m[n]; 2671 break; 2672 } 2673 return &ia; 2674} 2675 2676char * 2677allocopy(p) 2678 char *p; 2679{ 2680 char *q = (char *)malloc(strlen(p) + 1); 2681 2682 strcpy(q, p); 2683 return q; 2684} 2685 2686char * 2687hms() 2688{ 2689 static char buf[BUFSIZ]; 2690 time_t t; 2691 struct tm *tm; 2692 2693 t = time(NULL); 2694 if ((tm = localtime(&t)) == 0) 2695 fatal("localtime"); 2696 snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec); 2697 return buf; 2698} 2699 2700#define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */ 2701 2702int 2703ripinterval(timer) 2704 int timer; 2705{ 2706 double r = rand(); 2707 2708 interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5)); 2709 nextalarm = time(NULL) + interval; 2710 return interval; 2711} 2712 2713time_t 2714ripsuptrig() 2715{ 2716 time_t t; 2717 2718 double r = rand(); 2719 t = (int)(RIP_TRIG_INT6_MIN + 2720 (RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX )); 2721 sup_trig_update = time(NULL) + t; 2722 return t; 2723} 2724 2725void 2726#ifdef __STDC__ 2727fatal(const char *fmt, ...) 2728#else 2729fatal(fmt, va_alist) 2730 char *fmt; 2731 va_dcl 2732#endif 2733{ 2734 va_list ap; 2735 char buf[1024]; 2736 2737#ifdef __STDC__ 2738 va_start(ap, fmt); 2739#else 2740 va_start(ap); 2741#endif 2742 vsnprintf(buf, sizeof(buf), fmt, ap); 2743 perror(buf); 2744 syslog(LOG_ERR, "%s: %s", buf, strerror(errno)); 2745 rtdexit(0); 2746 va_end(ap); 2747} 2748 2749void 2750#ifdef __STDC__ 2751tracet(int level, const char *fmt, ...) 2752#else 2753tracet(level, fmt, va_alist) 2754 int level; 2755 char *fmt; 2756 va_dcl 2757#endif 2758{ 2759 va_list ap; 2760 2761#ifdef __STDC__ 2762 va_start(ap, fmt); 2763#else 2764 va_start(ap); 2765#endif 2766 if (level <= dflag) { 2767 fprintf(stderr, "%s: ", hms()); 2768 vfprintf(stderr, fmt, ap); 2769 } 2770 if (dflag) { 2771 if (level > 0) 2772 vsyslog(LOG_DEBUG, fmt, ap); 2773 else 2774 vsyslog(LOG_WARNING, fmt, ap); 2775 } 2776 va_end(ap); 2777} 2778 2779void 2780#ifdef __STDC__ 2781trace(int level, const char *fmt, ...) 2782#else 2783trace(level, fmt, va_alist) 2784 int level; 2785 char *fmt; 2786 va_dcl 2787#endif 2788{ 2789 va_list ap; 2790 2791#ifdef __STDC__ 2792 va_start(ap, fmt); 2793#else 2794 va_start(ap); 2795#endif 2796 if (level <= dflag) 2797 vfprintf(stderr, fmt, ap); 2798 if (dflag) { 2799 if (level > 0) 2800 vsyslog(LOG_DEBUG, fmt, ap); 2801 else 2802 vsyslog(LOG_WARNING, fmt, ap); 2803 } 2804 va_end(ap); 2805} 2806 2807unsigned int 2808if_maxindex() 2809{ 2810 struct if_nameindex *p, *p0; 2811 unsigned int max = 0; 2812 2813 p0 = if_nameindex(); 2814 for (p = p0; p && p->if_index && p->if_name; p++) { 2815 if (max < p->if_index) 2816 max = p->if_index; 2817 } 2818 if_freenameindex(p0); 2819 return max; 2820} 2821 2822struct ifc * 2823ifc_find(name) 2824 char *name; 2825{ 2826 struct ifc *ifcp; 2827 2828 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { 2829 if (strcmp(name, ifcp->ifc_name) == 0) 2830 return ifcp; 2831 } 2832 return (struct ifc *)NULL; 2833} 2834 2835struct iff * 2836iff_find(ifcp, type) 2837 struct ifc *ifcp; 2838 int type; 2839{ 2840 struct iff *iffp; 2841 2842 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { 2843 if (iffp->iff_type == type) 2844 return iffp; 2845 } 2846 return NULL; 2847} 2848 2849void 2850setindex2ifc(index, ifcp) 2851 int index; 2852 struct ifc *ifcp; 2853{ 2854 int n; 2855 2856 if (!index2ifc) { 2857 nindex2ifc = 5; /*initial guess*/ 2858 index2ifc = (struct ifc **) 2859 malloc(sizeof(*index2ifc) * nindex2ifc); 2860 if (index2ifc == NULL) 2861 fatal("malloc"); 2862 memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc); 2863 } 2864 n = nindex2ifc; 2865 while (nindex2ifc <= index) 2866 nindex2ifc *= 2; 2867 if (n != nindex2ifc) { 2868 index2ifc = (struct ifc **) 2869 realloc(index2ifc, sizeof(*index2ifc) * nindex2ifc); 2870 if (index2ifc == NULL) 2871 fatal("realloc"); 2872 } 2873 index2ifc[index] = ifcp; 2874} 2875