| File: | src/usr.sbin/route6d/route6d.c |
| Warning: | line 2447, column 3 Value stored to 'rtmp' is never read |
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| 1 | /* $OpenBSD: route6d.c,v 1.100 2020/12/29 19:48:27 benno Exp $ */ |
| 2 | /* $KAME: route6d.c,v 1.111 2006/10/25 06:38:13 jinmei 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/types.h> |
| 34 | #include <sys/ioctl.h> |
| 35 | #include <sys/socket.h> |
| 36 | #include <sys/sysctl.h> |
| 37 | #include <sys/uio.h> |
| 38 | |
| 39 | #include <net/if.h> |
| 40 | #include <net/route.h> |
| 41 | #include <netinet/in.h> |
| 42 | #include <netinet/ip6.h> |
| 43 | #include <netinet/udp.h> |
| 44 | #include <netinet6/in6_var.h> |
| 45 | |
| 46 | #include <arpa/inet.h> |
| 47 | #include <errno(*__errno()).h> |
| 48 | #include <ifaddrs.h> |
| 49 | #include <netdb.h> |
| 50 | #include <poll.h> |
| 51 | #include <signal.h> |
| 52 | #include <stdarg.h> |
| 53 | #include <stddef.h> |
| 54 | #include <stdint.h> |
| 55 | #include <stdio.h> |
| 56 | #include <stdlib.h> |
| 57 | #include <string.h> |
| 58 | #include <time.h> |
| 59 | #include <unistd.h> |
| 60 | |
| 61 | #include "route6d.h" |
| 62 | #include "log.h" |
| 63 | |
| 64 | #define MAXFILTER40 40 |
| 65 | |
| 66 | #ifdef DEBUG |
| 67 | #define INIT_INTERVAL610 6 |
| 68 | #else |
| 69 | #define INIT_INTERVAL610 10 /* Wait to submit a initial riprequest */ |
| 70 | #endif |
| 71 | |
| 72 | /* alignment constraint for routing socket */ |
| 73 | #define ROUNDUP(a)((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof (long)) \ |
| 74 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) |
| 75 | #define ADVANCE(x, n)(x += (((n)->sa_len) > 0 ? (1 + ((((n)->sa_len) - 1) | (sizeof(long) - 1))) : sizeof(long))) (x += ROUNDUP((n)->sa_len)(((n)->sa_len) > 0 ? (1 + ((((n)->sa_len) - 1) | (sizeof (long) - 1))) : sizeof(long))) |
| 76 | |
| 77 | /* |
| 78 | * Following two macros are highly depending on KAME Release |
| 79 | */ |
| 80 | #define IN6_LINKLOCAL_IFINDEX(addr)((addr).__u6_addr.__u6_addr8[2] << 8 | (addr).__u6_addr .__u6_addr8[3]) \ |
| 81 | ((addr).s6_addr__u6_addr.__u6_addr8[2] << 8 | (addr).s6_addr__u6_addr.__u6_addr8[3]) |
| 82 | |
| 83 | #define SET_IN6_LINKLOCAL_IFINDEX(addr, index)do { (addr).__u6_addr.__u6_addr8[2] = ((index) >> 8) & 0xff; (addr).__u6_addr.__u6_addr8[3] = (index) & 0xff; } while (0) \ |
| 84 | do { \ |
| 85 | (addr).s6_addr__u6_addr.__u6_addr8[2] = ((index) >> 8) & 0xff; \ |
| 86 | (addr).s6_addr__u6_addr.__u6_addr8[3] = (index) & 0xff; \ |
| 87 | } while (0) |
| 88 | |
| 89 | struct ifc { /* Configuration of an interface */ |
| 90 | char *ifc_name; /* if name */ |
| 91 | struct ifc *ifc_next; |
| 92 | int ifc_index; /* if index */ |
| 93 | int ifc_mtu; /* if mtu */ |
| 94 | int ifc_metric; /* if metric */ |
| 95 | u_int ifc_flags; /* flags */ |
| 96 | short ifc_cflags; /* IFC_XXX */ |
| 97 | struct in6_addr ifc_mylladdr; /* my link-local address */ |
| 98 | struct sockaddr_in6 ifc_ripsin; /* rip multicast address */ |
| 99 | struct iff *ifc_filter; /* filter structure */ |
| 100 | struct ifac *ifc_addr; /* list of AF_INET6 addresses */ |
| 101 | int ifc_joined; /* joined to ff02::9 */ |
| 102 | }; |
| 103 | |
| 104 | struct ifac { /* Address associated to an interface */ |
| 105 | struct ifc *ifa_conf; /* back pointer */ |
| 106 | struct ifac *ifa_next; |
| 107 | struct in6_addr ifa_addr; /* address */ |
| 108 | struct in6_addr ifa_raddr; /* remote address, valid in p2p */ |
| 109 | int ifa_plen; /* prefix length */ |
| 110 | }; |
| 111 | |
| 112 | struct iff { |
| 113 | int iff_type; |
| 114 | struct in6_addr iff_addr; |
| 115 | int iff_plen; |
| 116 | struct iff *iff_next; |
| 117 | }; |
| 118 | |
| 119 | struct ifc *ifc; |
| 120 | int nifc; /* number of valid ifc's */ |
| 121 | struct ifc **index2ifc; |
| 122 | int nindex2ifc; |
| 123 | struct ifc *loopifcp = NULL((void *)0); /* pointing to loopback */ |
| 124 | struct pollfd pfd[2]; |
| 125 | int rtsock; /* the routing socket */ |
| 126 | int ripsock; /* socket to send/receive RIP datagram */ |
| 127 | |
| 128 | struct rip6 *ripbuf; /* packet buffer for sending */ |
| 129 | |
| 130 | /* |
| 131 | * Maintain the routes in a linked list. When the number of the routes |
| 132 | * grows, somebody would like to introduce a hash based or a radix tree |
| 133 | * based structure. I believe the number of routes handled by RIP is |
| 134 | * limited and I don't have to manage a complex data structure, however. |
| 135 | * |
| 136 | * One of the major drawbacks of the linear linked list is the difficulty |
| 137 | * of representing the relationship between a couple of routes. This may |
| 138 | * be a significant problem when we have to support route aggregation with |
| 139 | * suppressing the specifics covered by the aggregate. |
| 140 | */ |
| 141 | |
| 142 | struct riprt { |
| 143 | struct riprt *rrt_next; /* next destination */ |
| 144 | struct netinfo6 rrt_info; /* network info */ |
| 145 | struct in6_addr rrt_gw; /* gateway */ |
| 146 | u_long rrt_flags; /* kernel routing table flags */ |
| 147 | u_long rrt_rflags; /* route6d routing table flags */ |
| 148 | time_t rrt_t; /* when the route validated */ |
| 149 | int rrt_index; /* ifindex from which this route got */ |
| 150 | }; |
| 151 | |
| 152 | struct riprt *riprt = 0; |
| 153 | |
| 154 | int dflag = 0; /* debug flag */ |
| 155 | int qflag = 0; /* quiet flag */ |
| 156 | int nflag = 0; /* don't update kernel routing table */ |
| 157 | int aflag = 0; /* age out even the statically defined routes */ |
| 158 | int hflag = 0; /* don't split horizon */ |
| 159 | int lflag = 0; /* exchange site local routes */ |
| 160 | int sflag = 0; /* announce static routes w/ split horizon */ |
| 161 | int Sflag = 0; /* announce static routes to every interface */ |
| 162 | int uflag = 0; /* always log route updates (additions/deletions) */ |
| 163 | unsigned long routetag = 0; /* route tag attached on originating case */ |
| 164 | |
| 165 | char *filter[MAXFILTER40]; |
| 166 | int filtertype[MAXFILTER40]; |
| 167 | int nfilter = 0; |
| 168 | |
| 169 | pid_t pid; |
| 170 | |
| 171 | struct sockaddr_storage ripsin; |
| 172 | |
| 173 | time_t nextalarm = 0; |
| 174 | time_t sup_trig_update = 0; |
| 175 | |
| 176 | static int seq = 0; |
| 177 | |
| 178 | volatile sig_atomic_t seenalrm; |
| 179 | volatile sig_atomic_t seenquit; |
| 180 | volatile sig_atomic_t seenusr1; |
| 181 | |
| 182 | #define RRTF_AGGREGATE0x08000000 0x08000000 |
| 183 | #define RRTF_NOADVERTISE0x10000000 0x10000000 |
| 184 | #define RRTF_NH_NOT_LLADDR0x20000000 0x20000000 |
| 185 | #define RRTF_SENDANYWAY0x40000000 0x40000000 |
| 186 | #define RRTF_CHANGED0x80000000 0x80000000 |
| 187 | |
| 188 | void sighandler(int); |
| 189 | void ripalarm(void); |
| 190 | void riprecv(void); |
| 191 | void ripsend(struct ifc *, struct sockaddr_in6 *, int); |
| 192 | int out_filter(struct riprt *, struct ifc *); |
| 193 | void init(void); |
| 194 | void sockopt(struct ifc *); |
| 195 | void ifconfig(void); |
| 196 | void ifconfig1(const char *, const struct sockaddr *, struct ifc *, int); |
| 197 | void rtrecv(void); |
| 198 | int rt_del(const struct sockaddr_in6 *, const struct sockaddr_in6 *, |
| 199 | const struct sockaddr_in6 *); |
| 200 | int rt_deladdr(struct ifc *, const struct sockaddr_in6 *, |
| 201 | const struct sockaddr_in6 *); |
| 202 | void filterconfig(void); |
| 203 | int getifmtu(int); |
| 204 | const char *rttypes(struct rt_msghdr *); |
| 205 | const char *rtflags(struct rt_msghdr *); |
| 206 | const char *ifflags(int); |
| 207 | int ifrt(struct ifc *, int); |
| 208 | void ifrt_p2p(struct ifc *, int); |
| 209 | void applyplen(struct in6_addr *, int); |
| 210 | void ifrtdump(int); |
| 211 | void ifdump(int); |
| 212 | void ifdump0(const struct ifc *); |
| 213 | void rtdump(int); |
| 214 | void rt_entry(struct rt_msghdr *, int); |
| 215 | __dead__attribute__((__noreturn__)) void rtdexit(void); |
| 216 | void riprequest(struct ifc *, struct netinfo6 *, int, struct sockaddr_in6 *); |
| 217 | void ripflush(struct ifc *, struct sockaddr_in6 *); |
| 218 | void sendrequest(struct ifc *); |
| 219 | int sin6mask2len(const struct sockaddr_in6 *); |
| 220 | int mask2len(const struct in6_addr *, int); |
| 221 | int sendpacket(struct sockaddr_in6 *, int); |
| 222 | int addroute(struct riprt *, const struct in6_addr *, struct ifc *); |
| 223 | int delroute(struct netinfo6 *, struct in6_addr *); |
| 224 | struct in6_addr *getroute(struct netinfo6 *, struct in6_addr *); |
| 225 | void krtread(int); |
| 226 | int tobeadv(struct riprt *, struct ifc *); |
| 227 | char *xstrdup(const char *); |
| 228 | const char *hms(void); |
| 229 | const char *inet6_n2p(const struct in6_addr *); |
| 230 | struct ifac *ifa_match(const struct ifc *, const struct in6_addr *, int); |
| 231 | struct in6_addr *plen2mask(int); |
| 232 | struct riprt *rtsearch(struct netinfo6 *, struct riprt **); |
| 233 | int ripinterval(int); |
| 234 | time_t ripsuptrig(void); |
| 235 | unsigned int if_maxindex(void); |
| 236 | struct ifc *ifc_find(char *); |
| 237 | struct iff *iff_find(struct ifc *, int); |
| 238 | void setindex2ifc(int, struct ifc *); |
| 239 | |
| 240 | int |
| 241 | main(int argc, char *argv[]) |
| 242 | { |
| 243 | int ch; |
| 244 | int error = 0; |
| 245 | struct ifc *ifcp; |
| 246 | sigset_t mask, omask; |
| 247 | char *ep; |
| 248 | |
| 249 | log_init(1); /* log to stderr until daemonized */ |
| 250 | |
| 251 | while ((ch = getopt(argc, argv, "A:N:O:T:L:t:adDhlnqsSu")) != -1) { |
| 252 | switch (ch) { |
| 253 | case 'A': |
| 254 | case 'N': |
| 255 | case 'O': |
| 256 | case 'T': |
| 257 | case 'L': |
| 258 | if (nfilter >= MAXFILTER40) { |
| 259 | fatalx("Exceeds MAXFILTER"); |
| 260 | /*NOTREACHED*/ |
| 261 | } |
| 262 | filtertype[nfilter] = ch; |
| 263 | filter[nfilter++] = xstrdup(optarg); |
| 264 | break; |
| 265 | case 't': |
| 266 | ep = NULL((void *)0); |
| 267 | routetag = strtoul(optarg, &ep, 0); |
| 268 | if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) { |
| 269 | fatalx("invalid route tag"); |
| 270 | /*NOTREACHED*/ |
| 271 | } |
| 272 | break; |
| 273 | #define FLAG(c, flag, n) case c: do { flag = n; break; } while(0) |
| 274 | FLAG('a', aflag, 1); break; |
| 275 | FLAG('d', dflag, 1); break; |
| 276 | FLAG('D', dflag, 2); break; |
| 277 | FLAG('h', hflag, 1); break; |
| 278 | FLAG('l', lflag, 1); break; |
| 279 | FLAG('n', nflag, 1); break; |
| 280 | FLAG('q', qflag, 1); break; |
| 281 | FLAG('s', sflag, 1); break; |
| 282 | FLAG('S', Sflag, 1); break; |
| 283 | FLAG('u', uflag, 1); break; |
| 284 | #undef FLAG |
| 285 | default: |
| 286 | fatalx("Invalid option specified, terminating"); |
| 287 | /*NOTREACHED*/ |
| 288 | } |
| 289 | } |
| 290 | argc -= optind; |
| 291 | argv += optind; |
| 292 | if (argc > 0) { |
| 293 | fatalx("bogus extra arguments"); |
| 294 | /*NOTREACHED*/ |
| 295 | } |
| 296 | |
| 297 | if (geteuid()) { |
| 298 | nflag = 1; |
| 299 | log_warn("No kernel update is allowed"); |
| 300 | } |
| 301 | |
| 302 | if (dflag == 0) { |
| 303 | if (daemon(0, 0) == -1) { |
| 304 | fatal("daemon"); |
| 305 | /*NOTREACHED*/ |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | log_init(dflag); |
| 310 | |
| 311 | pid = getpid(); |
| 312 | |
| 313 | if ((ripbuf = calloc(RIP6_MAXMTU1500, 1)) == NULL((void *)0)) |
| 314 | fatal(NULL((void *)0)); |
| 315 | ripbuf->rip6_cmd = RIP6_RESPONSE2; |
| 316 | ripbuf->rip6_vers = RIP6_VERSION1; |
| 317 | ripbuf->rip6_res1[0] = 0; |
| 318 | ripbuf->rip6_res1[1] = 0; |
| 319 | |
| 320 | init(); |
| 321 | |
| 322 | if (pledge("stdio inet route mcast", NULL((void *)0)) == -1) |
| 323 | fatal("pledge"); |
| 324 | |
| 325 | ifconfig(); |
| 326 | |
| 327 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { |
| 328 | if (ifcp->ifc_index < 0) { |
| 329 | log_warn( |
| 330 | "No ifindex found at %s (no link-local address?)", |
| 331 | ifcp->ifc_name); |
| 332 | error++; |
| 333 | } |
| 334 | } |
| 335 | if (error) |
| 336 | exit(1); |
| 337 | if (loopifcp == NULL((void *)0)) { |
| 338 | fatalx("No loopback found"); |
| 339 | /*NOTREACHED*/ |
| 340 | } |
| 341 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) |
| 342 | ifrt(ifcp, 0); |
| 343 | filterconfig(); |
| 344 | krtread(0); |
| 345 | if (dflag) |
| 346 | ifrtdump(0); |
| 347 | |
| 348 | if (signal(SIGALRM14, sighandler) == SIG_ERR(void (*)(int))-1 || |
| 349 | signal(SIGQUIT3, sighandler) == SIG_ERR(void (*)(int))-1 || |
| 350 | signal(SIGTERM15, sighandler) == SIG_ERR(void (*)(int))-1 || |
| 351 | signal(SIGUSR130, sighandler) == SIG_ERR(void (*)(int))-1 || |
| 352 | signal(SIGHUP1, sighandler) == SIG_ERR(void (*)(int))-1 || |
| 353 | signal(SIGINT2, sighandler) == SIG_ERR(void (*)(int))-1) { |
| 354 | fatal("signal"); |
| 355 | /*NOTREACHED*/ |
| 356 | } |
| 357 | /* |
| 358 | * To avoid rip packet congestion (not on a cable but in this |
| 359 | * process), wait for a moment to send the first RIP6_RESPONSE |
| 360 | * packets. |
| 361 | */ |
| 362 | alarm(ripinterval(INIT_INTERVAL610)); |
| 363 | |
| 364 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { |
| 365 | if (iff_find(ifcp, 'N')) |
| 366 | continue; |
| 367 | if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP0x1)) |
| 368 | sendrequest(ifcp); |
| 369 | } |
| 370 | |
| 371 | log_info("**** Started ****"); |
| 372 | sigemptyset(&mask); |
| 373 | sigaddset(&mask, SIGALRM14); |
| 374 | while (1) { |
| 375 | if (seenalrm) { |
| 376 | ripalarm(); |
| 377 | seenalrm = 0; |
| 378 | continue; |
| 379 | } |
| 380 | if (seenquit) { |
| 381 | rtdexit(); |
| 382 | seenquit = 0; |
| 383 | continue; |
| 384 | } |
| 385 | if (seenusr1) { |
| 386 | ifrtdump(SIGUSR130); |
| 387 | seenusr1 = 0; |
| 388 | continue; |
| 389 | } |
| 390 | |
| 391 | switch (poll(pfd, 2, INFTIM(-1))) |
| 392 | { |
| 393 | case -1: |
| 394 | if (errno(*__errno()) != EINTR4) { |
| 395 | fatal("poll"); |
| 396 | /*NOTREACHED*/ |
| 397 | } |
| 398 | continue; |
| 399 | case 0: |
| 400 | continue; |
| 401 | default: |
| 402 | if (pfd[0].revents & POLLIN0x0001) { |
| 403 | sigprocmask(SIG_BLOCK1, &mask, &omask); |
| 404 | riprecv(); |
| 405 | sigprocmask(SIG_SETMASK3, &omask, NULL((void *)0)); |
| 406 | } |
| 407 | if (pfd[1].revents & POLLIN0x0001) { |
| 408 | sigprocmask(SIG_BLOCK1, &mask, &omask); |
| 409 | rtrecv(); |
| 410 | sigprocmask(SIG_SETMASK3, &omask, NULL((void *)0)); |
| 411 | } |
| 412 | } |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | void |
| 417 | sighandler(int signo) |
| 418 | { |
| 419 | |
| 420 | switch (signo) { |
| 421 | case SIGALRM14: |
| 422 | seenalrm++; |
| 423 | break; |
| 424 | case SIGQUIT3: |
| 425 | case SIGTERM15: |
| 426 | seenquit++; |
| 427 | break; |
| 428 | case SIGUSR130: |
| 429 | case SIGHUP1: |
| 430 | case SIGINT2: |
| 431 | seenusr1++; |
| 432 | break; |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * gracefully exits after resetting sockopts. |
| 438 | */ |
| 439 | void |
| 440 | rtdexit(void) |
| 441 | { |
| 442 | struct riprt *rrt; |
| 443 | |
| 444 | alarm(0); |
| 445 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { |
| 446 | if (rrt->rrt_rflags & RRTF_AGGREGATE0x08000000) { |
| 447 | delroute(&rrt->rrt_info, &rrt->rrt_gw); |
| 448 | } |
| 449 | } |
| 450 | close(ripsock); |
| 451 | close(rtsock); |
| 452 | log_info("**** Terminated ****"); |
| 453 | exit(1); |
| 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Called periodically: |
| 458 | * 1. age out the learned route. remove it if necessary. |
| 459 | * 2. submit RIP6_RESPONSE packets. |
| 460 | * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have |
| 461 | * to invoke this function in every 1 or 5 or 10 seconds only to age the |
| 462 | * routes more precisely. |
| 463 | */ |
| 464 | void |
| 465 | ripalarm(void) |
| 466 | { |
| 467 | struct ifc *ifcp; |
| 468 | struct riprt *rrt, *rrt_prev, *rrt_next; |
| 469 | time_t t_lifetime, t_holddown; |
| 470 | |
| 471 | /* age the RIP routes */ |
| 472 | rrt_prev = 0; |
| 473 | t_lifetime = time(NULL((void *)0)) - RIP_LIFETIME180; |
| 474 | t_holddown = t_lifetime - RIP_HOLDDOWN120; |
| 475 | for (rrt = riprt; rrt; rrt = rrt_next) { |
| 476 | rrt_next = rrt->rrt_next; |
| 477 | |
| 478 | if (rrt->rrt_t == 0) { |
| 479 | rrt_prev = rrt; |
| 480 | continue; |
| 481 | } |
| 482 | if (rrt->rrt_t < t_holddown) { |
| 483 | if (rrt_prev) { |
| 484 | rrt_prev->rrt_next = rrt->rrt_next; |
| 485 | } else { |
| 486 | riprt = rrt->rrt_next; |
| 487 | } |
| 488 | delroute(&rrt->rrt_info, &rrt->rrt_gw); |
| 489 | free(rrt); |
| 490 | continue; |
| 491 | } |
| 492 | if (rrt->rrt_t < t_lifetime) |
| 493 | rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; |
| 494 | rrt_prev = rrt; |
| 495 | } |
| 496 | /* Supply updates */ |
| 497 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { |
| 498 | if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP0x1)) |
| 499 | ripsend(ifcp, &ifcp->ifc_ripsin, 0); |
| 500 | } |
| 501 | alarm(ripinterval(SUPPLY_INTERVAL630)); |
| 502 | } |
| 503 | |
| 504 | void |
| 505 | init(void) |
| 506 | { |
| 507 | int i, error; |
| 508 | const int int0 = 0, int1 = 1, int255 = 255; |
| 509 | struct addrinfo hints, *res; |
| 510 | char port[NI_MAXSERV32]; |
| 511 | |
| 512 | ifc = (struct ifc *)NULL((void *)0); |
| 513 | nifc = 0; |
| 514 | nindex2ifc = 0; /*initial guess*/ |
| 515 | index2ifc = NULL((void *)0); |
| 516 | snprintf(port, sizeof(port), "%u", RIP6_PORT521); |
| 517 | |
| 518 | memset(&hints, 0, sizeof(hints)); |
| 519 | hints.ai_family = PF_INET624; |
| 520 | hints.ai_socktype = SOCK_DGRAM2; |
| 521 | hints.ai_flags = AI_PASSIVE1; |
| 522 | error = getaddrinfo(NULL((void *)0), port, &hints, &res); |
| 523 | if (error) { |
| 524 | fatalx(gai_strerror(error)); |
| 525 | /*NOTREACHED*/ |
| 526 | } |
| 527 | if (res->ai_next) { |
| 528 | fatalx(":: resolved to multiple address"); |
| 529 | /*NOTREACHED*/ |
| 530 | } |
| 531 | |
| 532 | ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); |
| 533 | if (ripsock == -1) { |
| 534 | fatal("rip socket"); |
| 535 | /*NOTREACHED*/ |
| 536 | } |
| 537 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_V6ONLY27, |
| 538 | &int1, sizeof(int1)) == -1) { |
| 539 | fatal("rip IPV6_V6ONLY"); |
| 540 | /*NOTREACHED*/ |
| 541 | } |
| 542 | if (bind(ripsock, res->ai_addr, res->ai_addrlen) == -1) { |
| 543 | fatal("rip bind"); |
| 544 | /*NOTREACHED*/ |
| 545 | } |
| 546 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_MULTICAST_HOPS10, |
| 547 | &int255, sizeof(int255)) == -1) { |
| 548 | fatal("rip IPV6_MULTICAST_HOPS"); |
| 549 | /*NOTREACHED*/ |
| 550 | } |
| 551 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_MULTICAST_LOOP11, |
| 552 | &int0, sizeof(int0)) == -1) { |
| 553 | fatal("rip IPV6_MULTICAST_LOOP"); |
| 554 | /*NOTREACHED*/ |
| 555 | } |
| 556 | |
| 557 | i = 1; |
| 558 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_RECVPKTINFO36, &i, |
| 559 | sizeof(i)) == -1) { |
| 560 | fatal("rip IPV6_RECVPKTINFO"); |
| 561 | /*NOTREACHED*/ |
| 562 | } |
| 563 | |
| 564 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_RECVHOPLIMIT37, |
| 565 | &int1, sizeof(int1)) == -1) { |
| 566 | fatal("rip IPV6_RECVHOPLIMIT"); |
| 567 | /*NOTREACHED*/ |
| 568 | } |
| 569 | |
| 570 | freeaddrinfo(res); |
| 571 | memset(&hints, 0, sizeof(hints)); |
| 572 | hints.ai_family = PF_INET624; |
| 573 | hints.ai_socktype = SOCK_DGRAM2; |
| 574 | error = getaddrinfo(RIP6_DEST"ff02::9", port, &hints, &res); |
| 575 | if (error) { |
| 576 | fatalx(gai_strerror(error)); |
| 577 | /*NOTREACHED*/ |
| 578 | } |
| 579 | if (res->ai_next) { |
| 580 | fatalx(RIP6_DEST"ff02::9" " resolved to multiple address"); |
| 581 | /*NOTREACHED*/ |
| 582 | } |
| 583 | memcpy(&ripsin, res->ai_addr, res->ai_addrlen); |
| 584 | freeaddrinfo(res); |
| 585 | |
| 586 | pfd[0].fd = ripsock; |
| 587 | pfd[0].events = POLLIN0x0001; |
| 588 | |
| 589 | if (nflag == 0) { |
| 590 | if ((rtsock = socket(AF_ROUTE17, SOCK_RAW3, 0)) == -1) { |
| 591 | fatal("route socket"); |
| 592 | /*NOTREACHED*/ |
| 593 | } |
| 594 | pfd[1].fd = rtsock; |
| 595 | pfd[1].events = POLLIN0x0001; |
| 596 | } else |
| 597 | pfd[1].fd = -1; |
| 598 | |
| 599 | } |
| 600 | |
| 601 | #define RIPSIZE(n)(sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6)) \ |
| 602 | (sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6)) |
| 603 | |
| 604 | /* |
| 605 | * ripflush flushes the rip datagram stored in the rip buffer |
| 606 | */ |
| 607 | static int nrt; |
| 608 | static struct netinfo6 *np; |
| 609 | |
| 610 | void |
| 611 | ripflush(struct ifc *ifcp, struct sockaddr_in6 *sin6) |
| 612 | { |
| 613 | int i; |
| 614 | int error; |
| 615 | |
| 616 | if (ifcp) |
| 617 | log_debug("Send(%s): info(%d) to %s.%d", |
| 618 | ifcp->ifc_name, nrt, |
| 619 | inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)(__uint16_t)(__builtin_constant_p(sin6->sin6_port) ? (__uint16_t )(((__uint16_t)(sin6->sin6_port) & 0xffU) << 8 | ((__uint16_t)(sin6->sin6_port) & 0xff00U) >> 8) : __swap16md(sin6->sin6_port))); |
| 620 | else |
| 621 | log_debug("Send: info(%d) to %s.%d", |
| 622 | nrt, inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)(__uint16_t)(__builtin_constant_p(sin6->sin6_port) ? (__uint16_t )(((__uint16_t)(sin6->sin6_port) & 0xffU) << 8 | ((__uint16_t)(sin6->sin6_port) & 0xff00U) >> 8) : __swap16md(sin6->sin6_port))); |
| 623 | if (dflag >= 2) { |
| 624 | np = ripbuf->rip6_netsrip6un.ru6_nets; |
| 625 | for (i = 0; i < nrt; i++, np++) { |
| 626 | if (np->rip6_metric == NEXTHOP_METRIC0xff) { |
| 627 | if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == 0))) |
| 628 | log_enqueue(" NextHop reset"); |
| 629 | else { |
| 630 | log_enqueue(" NextHop %s", |
| 631 | inet6_n2p(&np->rip6_dest)); |
| 632 | } |
| 633 | } else { |
| 634 | log_enqueue(" %s/%d[%d]", |
| 635 | inet6_n2p(&np->rip6_dest), |
| 636 | np->rip6_plen, np->rip6_metric); |
| 637 | } |
| 638 | if (np->rip6_tag) { |
| 639 | log_enqueue(" tag=0x%04x", |
| 640 | ntohs(np->rip6_tag)(__uint16_t)(__builtin_constant_p(np->rip6_tag) ? (__uint16_t )(((__uint16_t)(np->rip6_tag) & 0xffU) << 8 | (( __uint16_t)(np->rip6_tag) & 0xff00U) >> 8) : __swap16md (np->rip6_tag)) & 0xffff); |
| 641 | } |
| 642 | log_debug(""); |
| 643 | } |
| 644 | } |
| 645 | error = sendpacket(sin6, RIPSIZE(nrt)(sizeof(struct rip6) + ((nrt)-1) * sizeof(struct netinfo6))); |
| 646 | if (error == EAFNOSUPPORT47) { |
| 647 | /* Protocol not supported */ |
| 648 | log_debug("Could not send info to %s (%s): " |
| 649 | "set IFF_UP to 0", |
| 650 | ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); |
| 651 | ifcp->ifc_flags &= ~IFF_UP0x1; /* As if down for AF_INET6 */ |
| 652 | } |
| 653 | nrt = 0; np = ripbuf->rip6_netsrip6un.ru6_nets; |
| 654 | } |
| 655 | |
| 656 | /* |
| 657 | * Generate RIP6_RESPONSE packets and send them. |
| 658 | */ |
| 659 | void |
| 660 | ripsend(struct ifc *ifcp, struct sockaddr_in6 *sin6, int flag) |
| 661 | { |
| 662 | struct riprt *rrt; |
| 663 | struct in6_addr *nh; /* next hop */ |
| 664 | int maxrte; |
| 665 | |
| 666 | if (qflag) |
| 667 | return; |
| 668 | |
| 669 | if (ifcp == NULL((void *)0)) { |
| 670 | /* |
| 671 | * Request from non-link local address is not |
| 672 | * a regular route6d update. |
| 673 | */ |
| 674 | maxrte = (IFMINMTU576 - sizeof(struct ip6_hdr) - |
| 675 | sizeof(struct udphdr) - |
| 676 | sizeof(struct rip6) + sizeof(struct netinfo6)) / |
| 677 | sizeof(struct netinfo6); |
| 678 | nrt = 0; np = ripbuf->rip6_netsrip6un.ru6_nets; nh = NULL((void *)0); |
| 679 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { |
| 680 | if (rrt->rrt_rflags & RRTF_NOADVERTISE0x10000000) |
| 681 | continue; |
| 682 | /* Put the route to the buffer */ |
| 683 | *np = rrt->rrt_info; |
| 684 | np++; nrt++; |
| 685 | if (nrt == maxrte) { |
| 686 | ripflush(NULL((void *)0), sin6); |
| 687 | nh = NULL((void *)0); |
| 688 | } |
| 689 | } |
| 690 | if (nrt) /* Send last packet */ |
| 691 | ripflush(NULL((void *)0), sin6); |
| 692 | return; |
| 693 | } |
| 694 | |
| 695 | if ((flag & RRTF_SENDANYWAY0x40000000) == 0 && |
| 696 | (qflag || (ifcp->ifc_flags & IFF_LOOPBACK0x8))) |
| 697 | return; |
| 698 | |
| 699 | /* -N: no use */ |
| 700 | if (iff_find(ifcp, 'N') != NULL((void *)0)) |
| 701 | return; |
| 702 | |
| 703 | /* -T: generate default route only */ |
| 704 | if (iff_find(ifcp, 'T') != NULL((void *)0)) { |
| 705 | struct netinfo6 rrt_info; |
| 706 | memset(&rrt_info, 0, sizeof(struct netinfo6)); |
| 707 | rrt_info.rip6_dest = in6addr_any; |
| 708 | rrt_info.rip6_plen = 0; |
| 709 | rrt_info.rip6_metric = 1; |
| 710 | rrt_info.rip6_metric += ifcp->ifc_metric; |
| 711 | rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); |
| 712 | np = ripbuf->rip6_netsrip6un.ru6_nets; |
| 713 | *np = rrt_info; |
| 714 | nrt = 1; |
| 715 | ripflush(ifcp, sin6); |
| 716 | return; |
| 717 | } |
| 718 | |
| 719 | maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) - |
| 720 | sizeof(struct udphdr) - |
| 721 | sizeof(struct rip6) + sizeof(struct netinfo6)) / |
| 722 | sizeof(struct netinfo6); |
| 723 | |
| 724 | nrt = 0; np = ripbuf->rip6_netsrip6un.ru6_nets; nh = NULL((void *)0); |
| 725 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { |
| 726 | if (rrt->rrt_rflags & RRTF_NOADVERTISE0x10000000) |
| 727 | continue; |
| 728 | |
| 729 | /* Need to check filter here */ |
| 730 | if (out_filter(rrt, ifcp) == 0) |
| 731 | continue; |
| 732 | |
| 733 | /* Check split horizon and other conditions */ |
| 734 | if (tobeadv(rrt, ifcp) == 0) |
| 735 | continue; |
| 736 | |
| 737 | /* Only considers the routes with flag if specified */ |
| 738 | if ((flag & RRTF_CHANGED0x80000000) && |
| 739 | (rrt->rrt_rflags & RRTF_CHANGED0x80000000) == 0) |
| 740 | continue; |
| 741 | |
| 742 | /* Check nexthop */ |
| 743 | if (rrt->rrt_index == ifcp->ifc_index && |
| 744 | !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == 0)) && |
| 745 | (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR0x20000000) == 0) { |
| 746 | if (nh == NULL((void *)0) || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)(memcmp(&(nh)->__u6_addr.__u6_addr8[0], &(&rrt ->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { |
| 747 | if (nrt == maxrte - 2) |
| 748 | ripflush(ifcp, sin6); |
| 749 | np->rip6_dest = rrt->rrt_gw; |
| 750 | if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) |
| 751 | SET_IN6_LINKLOCAL_IFINDEX(np->rip6_dest, 0)do { (np->rip6_dest).__u6_addr.__u6_addr8[2] = ((0) >> 8) & 0xff; (np->rip6_dest).__u6_addr.__u6_addr8[3] = ( 0) & 0xff; } while (0); |
| 752 | np->rip6_plen = 0; |
| 753 | np->rip6_tag = 0; |
| 754 | np->rip6_metric = NEXTHOP_METRIC0xff; |
| 755 | nh = &rrt->rrt_gw; |
| 756 | np++; nrt++; |
| 757 | } |
| 758 | } else if (nh && (rrt->rrt_index != ifcp->ifc_index || |
| 759 | !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)(memcmp(&(nh)->__u6_addr.__u6_addr8[0], &(&rrt ->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0) || |
| 760 | rrt->rrt_rflags & RRTF_NH_NOT_LLADDR0x20000000)) { |
| 761 | /* Reset nexthop */ |
| 762 | if (nrt == maxrte - 2) |
| 763 | ripflush(ifcp, sin6); |
| 764 | memset(np, 0, sizeof(struct netinfo6)); |
| 765 | np->rip6_metric = NEXTHOP_METRIC0xff; |
| 766 | nh = NULL((void *)0); |
| 767 | np++; nrt++; |
| 768 | } |
| 769 | |
| 770 | /* Put the route to the buffer */ |
| 771 | *np = rrt->rrt_info; |
| 772 | np++; nrt++; |
| 773 | if (nrt == maxrte) { |
| 774 | ripflush(ifcp, sin6); |
| 775 | nh = NULL((void *)0); |
| 776 | } |
| 777 | } |
| 778 | if (nrt) /* Send last packet */ |
| 779 | ripflush(ifcp, sin6); |
| 780 | } |
| 781 | |
| 782 | /* |
| 783 | * outbound filter logic, per-route/interface. |
| 784 | */ |
| 785 | int |
| 786 | out_filter(struct riprt *rrt, struct ifc *ifcp) |
| 787 | { |
| 788 | struct iff *iffp; |
| 789 | struct in6_addr ia; |
| 790 | int ok; |
| 791 | |
| 792 | /* |
| 793 | * -A: filter out less specific routes, if we have aggregated |
| 794 | * route configured. |
| 795 | */ |
| 796 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { |
| 797 | if (iffp->iff_type != 'A') |
| 798 | continue; |
| 799 | if (rrt->rrt_info.rip6_plen <= iffp->iff_plen) |
| 800 | continue; |
| 801 | ia = rrt->rrt_info.rip6_dest; |
| 802 | applyplen(&ia, iffp->iff_plen); |
| 803 | if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& iffp->iff_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | /* |
| 808 | * if it is an aggregated route, advertise it only to the |
| 809 | * interfaces specified on -A. |
| 810 | */ |
| 811 | if ((rrt->rrt_rflags & RRTF_AGGREGATE0x08000000) != 0) { |
| 812 | ok = 0; |
| 813 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { |
| 814 | if (iffp->iff_type != 'A') |
| 815 | continue; |
| 816 | if (rrt->rrt_info.rip6_plen == iffp->iff_plen && |
| 817 | IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&iffp->iff_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) |
| 818 | &iffp->iff_addr)(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&iffp->iff_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0)) { |
| 819 | ok = 1; |
| 820 | break; |
| 821 | } |
| 822 | } |
| 823 | if (!ok) |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | /* |
| 828 | * -O: advertise only if prefix matches the configured prefix. |
| 829 | */ |
| 830 | if (iff_find(ifcp, 'O')) { |
| 831 | ok = 0; |
| 832 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { |
| 833 | if (iffp->iff_type != 'O') |
| 834 | continue; |
| 835 | if (rrt->rrt_info.rip6_plen < iffp->iff_plen) |
| 836 | continue; |
| 837 | ia = rrt->rrt_info.rip6_dest; |
| 838 | applyplen(&ia, iffp->iff_plen); |
| 839 | if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& iffp->iff_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) { |
| 840 | ok = 1; |
| 841 | break; |
| 842 | } |
| 843 | } |
| 844 | if (!ok) |
| 845 | return 0; |
| 846 | } |
| 847 | |
| 848 | /* the prefix should be advertised */ |
| 849 | return 1; |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * Determine if the route is to be advertised on the specified interface. |
| 854 | * It checks options specified in the arguments and the split horizon rule. |
| 855 | */ |
| 856 | int |
| 857 | tobeadv(struct riprt *rrt, struct ifc *ifcp) |
| 858 | { |
| 859 | |
| 860 | /* Special care for static routes */ |
| 861 | if (rrt->rrt_flags & RTF_STATIC0x800) { |
| 862 | /* XXX don't advertise reject/blackhole routes */ |
| 863 | if (rrt->rrt_flags & (RTF_REJECT0x8 | RTF_BLACKHOLE0x1000)) |
| 864 | return 0; |
| 865 | |
| 866 | if (Sflag) /* Yes, advertise it anyway */ |
| 867 | return 1; |
| 868 | if (sflag && rrt->rrt_index != ifcp->ifc_index) |
| 869 | return 1; |
| 870 | return 0; |
| 871 | } |
| 872 | /* Regular split horizon */ |
| 873 | if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index) |
| 874 | return 0; |
| 875 | return 1; |
| 876 | } |
| 877 | |
| 878 | /* |
| 879 | * Send a rip packet actually. |
| 880 | */ |
| 881 | int |
| 882 | sendpacket(struct sockaddr_in6 *sin6, int len) |
| 883 | { |
| 884 | struct msghdr m; |
| 885 | struct cmsghdr *cm; |
| 886 | struct iovec iov[2]; |
| 887 | union { |
| 888 | struct cmsghdr hdr; |
| 889 | u_char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(struct in6_pktinfo)) + (sizeof(long) - 1)) &~(sizeof(long) - 1) ))]; |
| 890 | } cmsgbuf; |
| 891 | struct in6_pktinfo *pi; |
| 892 | int idx; |
| 893 | struct sockaddr_in6 sincopy; |
| 894 | |
| 895 | /* do not overwrite the given sin */ |
| 896 | sincopy = *sin6; |
| 897 | sin6 = &sincopy; |
| 898 | |
| 899 | if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)(((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sin6->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80)) || |
| 900 | IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff )) { |
| 901 | /* XXX: do not mix the interface index and link index */ |
| 902 | idx = IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr)((sin6->sin6_addr).__u6_addr.__u6_addr8[2] << 8 | (sin6 ->sin6_addr).__u6_addr.__u6_addr8[3]); |
| 903 | SET_IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr, 0)do { (sin6->sin6_addr).__u6_addr.__u6_addr8[2] = ((0) >> 8) & 0xff; (sin6->sin6_addr).__u6_addr.__u6_addr8[3] = (0) & 0xff; } while (0); |
| 904 | sin6->sin6_scope_id = idx; |
| 905 | } else |
| 906 | idx = 0; |
| 907 | |
| 908 | m.msg_name = (caddr_t)sin6; |
| 909 | m.msg_namelen = sizeof(*sin6); |
| 910 | iov[0].iov_base = (caddr_t)ripbuf; |
| 911 | iov[0].iov_len = len; |
| 912 | m.msg_iov = iov; |
| 913 | m.msg_iovlen = 1; |
| 914 | if (!idx) { |
| 915 | m.msg_control = NULL((void *)0); |
| 916 | m.msg_controllen = 0; |
| 917 | } else { |
| 918 | memset(&cmsgbuf, 0, sizeof(cmsgbuf)); |
| 919 | m.msg_control = (caddr_t)&cmsgbuf.buf; |
| 920 | m.msg_controllen = sizeof(cmsgbuf.buf); |
| 921 | cm = CMSG_FIRSTHDR(&m)((&m)->msg_controllen >= sizeof(struct cmsghdr) ? ( struct cmsghdr *)(&m)->msg_control : (struct cmsghdr * )((void *)0)); |
| 922 | cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(struct in6_pktinfo))); |
| 923 | cm->cmsg_level = IPPROTO_IPV641; |
| 924 | cm->cmsg_type = IPV6_PKTINFO46; |
| 925 | pi = (struct in6_pktinfo *)CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
| 926 | memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/ |
| 927 | pi->ipi6_ifindex = idx; |
| 928 | } |
| 929 | |
| 930 | if (sendmsg(ripsock, &m, 0) == -1) { |
| 931 | log_debug("sendmsg: %s", strerror(errno(*__errno()))); |
| 932 | return errno(*__errno()); |
| 933 | } |
| 934 | |
| 935 | return 0; |
| 936 | } |
| 937 | |
| 938 | /* |
| 939 | * Receive and process RIP packets. Update the routes/kernel forwarding |
| 940 | * table if necessary. |
| 941 | */ |
| 942 | void |
| 943 | riprecv(void) |
| 944 | { |
| 945 | struct ifc *ifcp, *ic; |
| 946 | struct sockaddr_in6 fsock; |
| 947 | struct in6_addr nh; /* next hop */ |
| 948 | struct rip6 *rp; |
| 949 | struct netinfo6 *np, *nq; |
| 950 | struct riprt *rrt; |
| 951 | ssize_t len, nn; |
| 952 | unsigned int need_trigger, idx; |
| 953 | char buf[4 * RIP6_MAXMTU1500]; |
| 954 | time_t t; |
| 955 | struct msghdr m; |
| 956 | struct cmsghdr *cm; |
| 957 | struct iovec iov[2]; |
| 958 | union { |
| 959 | struct cmsghdr hdr; |
| 960 | u_char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(struct in6_pktinfo)) + (sizeof(long) - 1)) &~(sizeof(long) - 1) )) + |
| 961 | CMSG_SPACE(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(int)) + (sizeof(long) - 1)) &~(sizeof(long) - 1)))]; |
| 962 | } cmsgbuf; |
| 963 | struct in6_pktinfo *pi = NULL((void *)0); |
| 964 | int *hlimp = NULL((void *)0); |
| 965 | struct iff *iffp; |
| 966 | struct in6_addr ia; |
| 967 | int ok; |
| 968 | time_t t_half_lifetime; |
| 969 | |
| 970 | need_trigger = 0; |
| 971 | |
| 972 | m.msg_name = (caddr_t)&fsock; |
| 973 | m.msg_namelen = sizeof(fsock); |
| 974 | iov[0].iov_base = (caddr_t)buf; |
| 975 | iov[0].iov_len = sizeof(buf); |
| 976 | m.msg_iov = iov; |
| 977 | m.msg_iovlen = 1; |
| 978 | m.msg_control = (caddr_t)&cmsgbuf.buf; |
| 979 | m.msg_controllen = sizeof(cmsgbuf.buf); |
| 980 | if ((len = recvmsg(ripsock, &m, 0)) == -1) { |
| 981 | fatal("recvmsg"); |
| 982 | /*NOTREACHED*/ |
| 983 | } |
| 984 | idx = 0; |
| 985 | for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m)((&m)->msg_controllen >= sizeof(struct cmsghdr) ? ( struct cmsghdr *)(&m)->msg_control : (struct cmsghdr * )((void *)0)); |
| 986 | cm; |
| 987 | cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)(((char *)(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof (long) - 1)) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof (struct cmsghdr)) + (sizeof(long) - 1)) &~(sizeof(long) - 1)) > ((char *)(&m)->msg_control) + (&m)->msg_controllen ) ? (struct cmsghdr *)((void *)0) : (struct cmsghdr *)((char * )(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof(long) - 1)) &~(sizeof(long) - 1))))) { |
| 988 | if (cm->cmsg_level != IPPROTO_IPV641) |
| 989 | continue; |
| 990 | switch (cm->cmsg_type) { |
| 991 | case IPV6_PKTINFO46: |
| 992 | if (cm->cmsg_len != CMSG_LEN(sizeof(*pi))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(*pi)))) { |
| 993 | log_debug( |
| 994 | "invalid cmsg length for IPV6_PKTINFO"); |
| 995 | return; |
| 996 | } |
| 997 | pi = (struct in6_pktinfo *)(CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1)))); |
| 998 | idx = pi->ipi6_ifindex; |
| 999 | break; |
| 1000 | case IPV6_HOPLIMIT47: |
| 1001 | if (cm->cmsg_len != CMSG_LEN(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(int)))) { |
| 1002 | log_debug( |
| 1003 | "invalid cmsg length for IPV6_HOPLIMIT"); |
| 1004 | return; |
| 1005 | } |
| 1006 | hlimp = (int *)CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
| 1007 | break; |
| 1008 | } |
| 1009 | } |
| 1010 | if (idx && IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)(((&fsock.sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&fsock.sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) |
| 1011 | SET_IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr, idx)do { (fsock.sin6_addr).__u6_addr.__u6_addr8[2] = ((idx) >> 8) & 0xff; (fsock.sin6_addr).__u6_addr.__u6_addr8[3] = ( idx) & 0xff; } while (0); |
| 1012 | |
| 1013 | if (len < sizeof(struct rip6)) { |
| 1014 | log_debug("Packet too short"); |
| 1015 | return; |
| 1016 | } |
| 1017 | |
| 1018 | if (pi == NULL((void *)0) || hlimp == NULL((void *)0)) { |
| 1019 | /* |
| 1020 | * This can happen when the kernel failed to allocate memory |
| 1021 | * for the ancillary data. Although we might be able to handle |
| 1022 | * some cases without this info, those are minor and not so |
| 1023 | * important, so it's better to discard the packet for safer |
| 1024 | * operation. |
| 1025 | */ |
| 1026 | log_debug("IPv6 packet information cannot be retrieved"); |
| 1027 | return; |
| 1028 | } |
| 1029 | |
| 1030 | nh = fsock.sin6_addr; |
| 1031 | nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / |
| 1032 | sizeof(struct netinfo6); |
| 1033 | rp = (struct rip6 *)buf; |
| 1034 | np = rp->rip6_netsrip6un.ru6_nets; |
| 1035 | |
| 1036 | if (rp->rip6_vers != RIP6_VERSION1) { |
| 1037 | log_debug("Incorrect RIP version %d", rp->rip6_vers); |
| 1038 | return; |
| 1039 | } |
| 1040 | if (rp->rip6_cmd == RIP6_REQUEST1) { |
| 1041 | if (idx && idx < nindex2ifc) { |
| 1042 | ifcp = index2ifc[idx]; |
| 1043 | riprequest(ifcp, np, nn, &fsock); |
| 1044 | } else { |
| 1045 | riprequest(NULL((void *)0), np, nn, &fsock); |
| 1046 | } |
| 1047 | return; |
| 1048 | } |
| 1049 | |
| 1050 | if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)(((&fsock.sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&fsock.sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { |
| 1051 | log_debug("Response from non-ll addr: %s", |
| 1052 | inet6_n2p(&fsock.sin6_addr)); |
| 1053 | return; /* Ignore packets from non-link-local addr */ |
| 1054 | } |
| 1055 | if (ntohs(fsock.sin6_port)(__uint16_t)(__builtin_constant_p(fsock.sin6_port) ? (__uint16_t )(((__uint16_t)(fsock.sin6_port) & 0xffU) << 8 | (( __uint16_t)(fsock.sin6_port) & 0xff00U) >> 8) : __swap16md (fsock.sin6_port)) != RIP6_PORT521) { |
| 1056 | log_debug("Response from non-rip port from %s", |
| 1057 | inet6_n2p(&fsock.sin6_addr)); |
| 1058 | return; |
| 1059 | } |
| 1060 | if (IN6_IS_ADDR_MULTICAST(&pi->ipi6_addr)((&pi->ipi6_addr)->__u6_addr.__u6_addr8[0] == 0xff) && *hlimp != 255) { |
| 1061 | log_debug( |
| 1062 | "Response packet with a smaller hop limit (%d) from %s", |
| 1063 | *hlimp, inet6_n2p(&fsock.sin6_addr)); |
| 1064 | return; |
| 1065 | } |
| 1066 | /* |
| 1067 | * Further validation: since this program does not send off-link |
| 1068 | * requests, an incoming response must always come from an on-link |
| 1069 | * node. Although this is normally ensured by the source address |
| 1070 | * check above, it may not 100% be safe because there are router |
| 1071 | * implementations that (invalidly) allow a packet with a link-local |
| 1072 | * source address to be forwarded to a different link. |
| 1073 | * So we also check whether the destination address is a link-local |
| 1074 | * address or the hop limit is 255. Note that RFC2080 does not require |
| 1075 | * the specific hop limit for a unicast response, so we cannot assume |
| 1076 | * the limitation. |
| 1077 | */ |
| 1078 | if (!IN6_IS_ADDR_LINKLOCAL(&pi->ipi6_addr)(((&pi->ipi6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&pi->ipi6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80)) && *hlimp != 255) { |
| 1079 | log_debug( |
| 1080 | "Response packet possibly from an off-link node: " |
| 1081 | "from %s to %s hlim=%d", |
| 1082 | inet6_n2p(&fsock.sin6_addr), inet6_n2p(&pi->ipi6_addr), |
| 1083 | *hlimp); |
| 1084 | return; |
| 1085 | } |
| 1086 | |
| 1087 | idx = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr)((fsock.sin6_addr).__u6_addr.__u6_addr8[2] << 8 | (fsock .sin6_addr).__u6_addr.__u6_addr8[3]); |
| 1088 | ifcp = (idx < nindex2ifc) ? index2ifc[idx] : NULL((void *)0); |
| 1089 | if (!ifcp) { |
| 1090 | log_debug("Packets to unknown interface index %d", idx); |
| 1091 | return; /* Ignore it */ |
| 1092 | } |
| 1093 | if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr)(memcmp(&(&ifcp->ifc_mylladdr)->__u6_addr.__u6_addr8 [0], &(&fsock.sin6_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) |
| 1094 | return; /* The packet is from me; ignore */ |
| 1095 | if (rp->rip6_cmd != RIP6_RESPONSE2) { |
| 1096 | log_debug("Invalid command %d", rp->rip6_cmd); |
| 1097 | return; |
| 1098 | } |
| 1099 | |
| 1100 | /* -N: no use */ |
| 1101 | if (iff_find(ifcp, 'N') != NULL((void *)0)) |
| 1102 | return; |
| 1103 | |
| 1104 | log_debug("Recv(%s): from %s.%d info(%zd)", |
| 1105 | ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port)(__uint16_t)(__builtin_constant_p(fsock.sin6_port) ? (__uint16_t )(((__uint16_t)(fsock.sin6_port) & 0xffU) << 8 | (( __uint16_t)(fsock.sin6_port) & 0xff00U) >> 8) : __swap16md (fsock.sin6_port)), nn); |
| 1106 | |
| 1107 | t = time(NULL((void *)0)); |
| 1108 | t_half_lifetime = t - (RIP_LIFETIME180/2); |
| 1109 | for (; nn; nn--, np++) { |
| 1110 | if (np->rip6_metric == NEXTHOP_METRIC0xff) { |
| 1111 | /* modify neighbor address */ |
| 1112 | if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { |
| 1113 | nh = np->rip6_dest; |
| 1114 | SET_IN6_LINKLOCAL_IFINDEX(nh, idx)do { (nh).__u6_addr.__u6_addr8[2] = ((idx) >> 8) & 0xff ; (nh).__u6_addr.__u6_addr8[3] = (idx) & 0xff; } while (0 ); |
| 1115 | log_debug("\tNexthop: %s", inet6_n2p(&nh)); |
| 1116 | } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == 0))) { |
| 1117 | nh = fsock.sin6_addr; |
| 1118 | log_debug("\tNexthop: %s", inet6_n2p(&nh)); |
| 1119 | } else { |
| 1120 | nh = fsock.sin6_addr; |
| 1121 | log_debug("\tInvalid Nexthop: %s", |
| 1122 | inet6_n2p(&np->rip6_dest)); |
| 1123 | } |
| 1124 | continue; |
| 1125 | } |
| 1126 | if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xff)) { |
| 1127 | log_debug("\tMulticast netinfo6: %s/%d [%d]", |
| 1128 | inet6_n2p(&np->rip6_dest), |
| 1129 | np->rip6_plen, np->rip6_metric); |
| 1130 | continue; |
| 1131 | } |
| 1132 | if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == (__uint32_t )(__builtin_constant_p(1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t )(1) & 0xff000000) >> 24) : __swap32md(1))))) { |
| 1133 | log_debug("\tLoopback netinfo6: %s/%d [%d]", |
| 1134 | inet6_n2p(&np->rip6_dest), |
| 1135 | np->rip6_plen, np->rip6_metric); |
| 1136 | continue; |
| 1137 | } |
| 1138 | if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { |
| 1139 | log_debug("\tLink Local netinfo6: %s/%d [%d]", |
| 1140 | inet6_n2p(&np->rip6_dest), |
| 1141 | np->rip6_plen, np->rip6_metric); |
| 1142 | continue; |
| 1143 | } |
| 1144 | /* may need to pass sitelocal prefix in some case, however*/ |
| 1145 | if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0xc0)) && !lflag) { |
| 1146 | log_debug("\tSite Local netinfo6: %s/%d [%d]", |
| 1147 | inet6_n2p(&np->rip6_dest), |
| 1148 | np->rip6_plen, np->rip6_metric); |
| 1149 | continue; |
| 1150 | } |
| 1151 | if (dflag >= 2) { |
| 1152 | log_enqueue("\tnetinfo6: %s/%d [%d]", |
| 1153 | inet6_n2p(&np->rip6_dest), |
| 1154 | np->rip6_plen, np->rip6_metric); |
| 1155 | if (np->rip6_tag) |
| 1156 | log_enqueue(" tag=0x%04x", |
| 1157 | ntohs(np->rip6_tag)(__uint16_t)(__builtin_constant_p(np->rip6_tag) ? (__uint16_t )(((__uint16_t)(np->rip6_tag) & 0xffU) << 8 | (( __uint16_t)(np->rip6_tag) & 0xff00U) >> 8) : __swap16md (np->rip6_tag)) & 0xffff); |
| 1158 | ia = np->rip6_dest; |
| 1159 | applyplen(&ia, np->rip6_plen); |
| 1160 | if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& np->rip6_dest)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) |
| 1161 | log_enqueue(" [junk outside prefix]"); |
| 1162 | } |
| 1163 | |
| 1164 | /* |
| 1165 | * -L: listen only if the prefix matches the configuration |
| 1166 | */ |
| 1167 | ok = 1; /* if there's no L filter, it is ok */ |
| 1168 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { |
| 1169 | if (iffp->iff_type != 'L') |
| 1170 | continue; |
| 1171 | ok = 0; |
| 1172 | if (np->rip6_plen < iffp->iff_plen) |
| 1173 | continue; |
| 1174 | /* special rule: ::/0 means default, not "in /0" */ |
| 1175 | if (iffp->iff_plen == 0 && np->rip6_plen > 0) |
| 1176 | continue; |
| 1177 | ia = np->rip6_dest; |
| 1178 | applyplen(&ia, iffp->iff_plen); |
| 1179 | if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& iffp->iff_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) { |
| 1180 | ok = 1; |
| 1181 | break; |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | if (!ok) { |
| 1186 | if (dflag >= 2) |
| 1187 | log_debug(" (filtered)"); |
| 1188 | continue; |
| 1189 | } |
| 1190 | |
| 1191 | if (dflag >= 2) |
| 1192 | log_debug(""); |
| 1193 | |
| 1194 | np->rip6_metric++; |
| 1195 | np->rip6_metric += ifcp->ifc_metric; |
| 1196 | if (np->rip6_metric > HOPCNT_INFINITY616) |
| 1197 | np->rip6_metric = HOPCNT_INFINITY616; |
| 1198 | |
| 1199 | applyplen(&np->rip6_dest, np->rip6_plen); |
| 1200 | if ((rrt = rtsearch(np, NULL((void *)0))) != NULL((void *)0)) { |
| 1201 | if (rrt->rrt_t == 0) |
| 1202 | continue; /* Intf route has priority */ |
| 1203 | nq = &rrt->rrt_info; |
| 1204 | if (nq->rip6_metric > np->rip6_metric) { |
| 1205 | if (rrt->rrt_index == ifcp->ifc_index && |
| 1206 | IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)(memcmp(&(&nh)->__u6_addr.__u6_addr8[0], &(& rrt->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { |
| 1207 | /* Small metric from the same gateway */ |
| 1208 | nq->rip6_metric = np->rip6_metric; |
| 1209 | } else { |
| 1210 | /* Better route found */ |
| 1211 | rrt->rrt_index = ifcp->ifc_index; |
| 1212 | /* Update routing table */ |
| 1213 | delroute(nq, &rrt->rrt_gw); |
| 1214 | rrt->rrt_gw = nh; |
| 1215 | *nq = *np; |
| 1216 | addroute(rrt, &nh, ifcp); |
| 1217 | } |
| 1218 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; |
| 1219 | rrt->rrt_t = t; |
| 1220 | need_trigger = 1; |
| 1221 | } else if (nq->rip6_metric < np->rip6_metric && |
| 1222 | rrt->rrt_index == ifcp->ifc_index && |
| 1223 | IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)(memcmp(&(&nh)->__u6_addr.__u6_addr8[0], &(& rrt->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { |
| 1224 | /* Got worse route from same gw */ |
| 1225 | nq->rip6_metric = np->rip6_metric; |
| 1226 | rrt->rrt_t = t; |
| 1227 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; |
| 1228 | need_trigger = 1; |
| 1229 | } else if (nq->rip6_metric == np->rip6_metric && |
| 1230 | np->rip6_metric < HOPCNT_INFINITY616) { |
| 1231 | if (rrt->rrt_index == ifcp->ifc_index && |
| 1232 | IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)(memcmp(&(&nh)->__u6_addr.__u6_addr8[0], &(& rrt->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { |
| 1233 | /* same metric, same route from same gw */ |
| 1234 | rrt->rrt_t = t; |
| 1235 | } else if (rrt->rrt_t < t_half_lifetime) { |
| 1236 | /* Better route found */ |
| 1237 | rrt->rrt_index = ifcp->ifc_index; |
| 1238 | /* Update routing table */ |
| 1239 | delroute(nq, &rrt->rrt_gw); |
| 1240 | rrt->rrt_gw = nh; |
| 1241 | *nq = *np; |
| 1242 | addroute(rrt, &nh, ifcp); |
| 1243 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; |
| 1244 | rrt->rrt_t = t; |
| 1245 | } |
| 1246 | } |
| 1247 | /* |
| 1248 | * if nq->rip6_metric == HOPCNT_INFINITY6 then |
| 1249 | * do not update age value. Do nothing. |
| 1250 | */ |
| 1251 | } else if (np->rip6_metric < HOPCNT_INFINITY616) { |
| 1252 | /* Got a new valid route */ |
| 1253 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void *)0)) { |
| 1254 | fatal("calloc: struct riprt"); |
| 1255 | /*NOTREACHED*/ |
| 1256 | } |
| 1257 | nq = &rrt->rrt_info; |
| 1258 | |
| 1259 | rrt->rrt_index = ifcp->ifc_index; |
| 1260 | rrt->rrt_flags = RTF_UP0x1|RTF_GATEWAY0x2; |
| 1261 | rrt->rrt_gw = nh; |
| 1262 | *nq = *np; |
| 1263 | applyplen(&nq->rip6_dest, nq->rip6_plen); |
| 1264 | if (nq->rip6_plen == sizeof(struct in6_addr) * 8) |
| 1265 | rrt->rrt_flags |= RTF_HOST0x4; |
| 1266 | |
| 1267 | /* Put the route to the list */ |
| 1268 | rrt->rrt_next = riprt; |
| 1269 | riprt = rrt; |
| 1270 | /* Update routing table */ |
| 1271 | addroute(rrt, &nh, ifcp); |
| 1272 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; |
| 1273 | need_trigger = 1; |
| 1274 | rrt->rrt_t = t; |
| 1275 | } |
| 1276 | } |
| 1277 | /* XXX need to care the interval between triggered updates */ |
| 1278 | if (need_trigger) { |
| 1279 | if (nextalarm > time(NULL((void *)0)) + RIP_TRIG_INT6_MAX5) { |
| 1280 | for (ic = ifc; ic; ic = ic->ifc_next) { |
| 1281 | if (ifcp->ifc_index == ic->ifc_index) |
| 1282 | continue; |
| 1283 | if (ic->ifc_flags & IFF_UP0x1) |
| 1284 | ripsend(ic, &ic->ifc_ripsin, |
| 1285 | RRTF_CHANGED0x80000000); |
| 1286 | } |
| 1287 | } |
| 1288 | /* Reset the flag */ |
| 1289 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) |
| 1290 | rrt->rrt_rflags &= ~RRTF_CHANGED0x80000000; |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | /* |
| 1295 | * Send all routes request packet to the specified interface. |
| 1296 | */ |
| 1297 | void |
| 1298 | sendrequest(struct ifc *ifcp) |
| 1299 | { |
| 1300 | struct netinfo6 *np; |
| 1301 | int error; |
| 1302 | |
| 1303 | if (ifcp->ifc_flags & IFF_LOOPBACK0x8) |
| 1304 | return; |
| 1305 | ripbuf->rip6_cmd = RIP6_REQUEST1; |
| 1306 | np = ripbuf->rip6_netsrip6un.ru6_nets; |
| 1307 | memset(np, 0, sizeof(struct netinfo6)); |
| 1308 | np->rip6_metric = HOPCNT_INFINITY616; |
| 1309 | log_debug("Send rtdump Request to %s (%s)", |
| 1310 | ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); |
| 1311 | error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1)(sizeof(struct rip6) + ((1)-1) * sizeof(struct netinfo6))); |
| 1312 | if (error == EAFNOSUPPORT47) { |
| 1313 | /* Protocol not supported */ |
| 1314 | log_debug("Could not send rtdump Request to %s (%s): " |
| 1315 | "set IFF_UP to 0", |
| 1316 | ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); |
| 1317 | ifcp->ifc_flags &= ~IFF_UP0x1; /* As if down for AF_INET6 */ |
| 1318 | } |
| 1319 | ripbuf->rip6_cmd = RIP6_RESPONSE2; |
| 1320 | } |
| 1321 | |
| 1322 | /* |
| 1323 | * Process a RIP6_REQUEST packet. |
| 1324 | */ |
| 1325 | void |
| 1326 | riprequest(struct ifc *ifcp, struct netinfo6 *np, int nn, |
| 1327 | struct sockaddr_in6 *sin6) |
| 1328 | { |
| 1329 | int i; |
| 1330 | struct riprt *rrt; |
| 1331 | |
| 1332 | if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == 0)) && |
| 1333 | np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY616)) { |
| 1334 | /* Specific response, don't split-horizon */ |
| 1335 | log_debug("\tRIP Request"); |
| 1336 | for (i = 0; i < nn; i++, np++) { |
| 1337 | rrt = rtsearch(np, NULL((void *)0)); |
| 1338 | if (rrt) |
| 1339 | np->rip6_metric = rrt->rrt_info.rip6_metric; |
| 1340 | else |
| 1341 | np->rip6_metric = HOPCNT_INFINITY616; |
| 1342 | } |
| 1343 | (void)sendpacket(sin6, RIPSIZE(nn)(sizeof(struct rip6) + ((nn)-1) * sizeof(struct netinfo6))); |
| 1344 | return; |
| 1345 | } |
| 1346 | /* Whole routing table dump */ |
| 1347 | log_debug("\tRIP Request -- whole routing table"); |
| 1348 | ripsend(ifcp, sin6, RRTF_SENDANYWAY0x40000000); |
| 1349 | } |
| 1350 | |
| 1351 | /* |
| 1352 | * Get information of each interface. |
| 1353 | */ |
| 1354 | void |
| 1355 | ifconfig(void) |
| 1356 | { |
| 1357 | struct ifaddrs *ifap, *ifa; |
| 1358 | struct ifc *ifcp; |
| 1359 | struct ipv6_mreq mreq; |
| 1360 | int s; |
| 1361 | |
| 1362 | if ((s = socket(AF_INET624, SOCK_DGRAM2, 0)) == -1) { |
| 1363 | fatal("socket"); |
| 1364 | /*NOTREACHED*/ |
| 1365 | } |
| 1366 | |
| 1367 | if (getifaddrs(&ifap) != 0) { |
| 1368 | fatal("getifaddrs"); |
| 1369 | /*NOTREACHED*/ |
| 1370 | } |
| 1371 | |
| 1372 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
| 1373 | if (ifa->ifa_addr == NULL((void *)0) || |
| 1374 | ifa->ifa_addr->sa_family != AF_INET624) |
| 1375 | continue; |
| 1376 | ifcp = ifc_find(ifa->ifa_name); |
| 1377 | /* we are interested in multicast-capable interfaces */ |
| 1378 | if ((ifa->ifa_flags & IFF_MULTICAST0x8000) == 0) |
| 1379 | continue; |
| 1380 | if (!ifcp) { |
| 1381 | /* new interface */ |
| 1382 | if ((ifcp = calloc(1, sizeof(struct ifc))) == NULL((void *)0)) { |
| 1383 | fatal("calloc: struct ifc"); |
| 1384 | /*NOTREACHED*/ |
| 1385 | } |
| 1386 | ifcp->ifc_index = -1; |
| 1387 | ifcp->ifc_next = ifc; |
| 1388 | ifc = ifcp; |
| 1389 | nifc++; |
| 1390 | ifcp->ifc_name = xstrdup(ifa->ifa_name); |
| 1391 | ifcp->ifc_addr = 0; |
| 1392 | ifcp->ifc_filter = 0; |
| 1393 | ifcp->ifc_flags = ifa->ifa_flags; |
| 1394 | log_debug("newif %s <%s>", ifcp->ifc_name, |
| 1395 | ifflags(ifcp->ifc_flags)); |
| 1396 | if (!strcmp(ifcp->ifc_name, LOOPBACK_IF"lo0")) |
| 1397 | loopifcp = ifcp; |
| 1398 | } else { |
| 1399 | /* update flag, this may be up again */ |
| 1400 | if (ifcp->ifc_flags != ifa->ifa_flags) { |
| 1401 | log_enqueue("%s: <%s> -> ", ifcp->ifc_name, |
| 1402 | ifflags(ifcp->ifc_flags)); |
| 1403 | log_debug("<%s>", ifflags(ifa->ifa_flags)); |
| 1404 | ifcp->ifc_cflags |= IFC_CHANGED1; |
| 1405 | } |
| 1406 | ifcp->ifc_flags = ifa->ifa_flags; |
| 1407 | } |
| 1408 | ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s); |
| 1409 | if ((ifcp->ifc_flags & (IFF_LOOPBACK0x8 | IFF_UP0x1)) == IFF_UP0x1 |
| 1410 | && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { |
| 1411 | mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; |
| 1412 | mreq.ipv6mr_interface = ifcp->ifc_index; |
| 1413 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_JOIN_GROUP12, |
| 1414 | &mreq, sizeof(mreq)) == -1) { |
| 1415 | fatalx("IPV6_JOIN_GROUP"); |
| 1416 | /*NOTREACHED*/ |
| 1417 | } |
| 1418 | log_debug("join %s %s", ifcp->ifc_name, RIP6_DEST"ff02::9"); |
| 1419 | ifcp->ifc_joined++; |
| 1420 | } |
| 1421 | } |
| 1422 | close(s); |
| 1423 | freeifaddrs(ifap); |
| 1424 | } |
| 1425 | |
| 1426 | void |
| 1427 | ifconfig1(const char *name, const struct sockaddr *sa, struct ifc *ifcp, int s) |
| 1428 | { |
| 1429 | struct in6_ifreq ifr; |
| 1430 | const struct sockaddr_in6 *sin6; |
| 1431 | struct ifac *ifa; |
| 1432 | int plen; |
| 1433 | char buf[BUFSIZ1024]; |
| 1434 | |
| 1435 | sin6 = (const struct sockaddr_in6 *)sa; |
| 1436 | if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)(((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sin6->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0xc0)) && !lflag) |
| 1437 | return; |
| 1438 | ifr.ifr_addrifr_ifru.ifru_addr = *sin6; |
| 1439 | strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); |
| 1440 | if (ioctl(s, SIOCGIFNETMASK_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct in6_ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((37))), (char *)&ifr) == -1) { |
| 1441 | fatal("ioctl: SIOCGIFNETMASK_IN6"); |
| 1442 | /*NOTREACHED*/ |
| 1443 | } |
| 1444 | plen = sin6mask2len(&ifr.ifr_addrifr_ifru.ifru_addr); |
| 1445 | if ((ifa = ifa_match(ifcp, &sin6->sin6_addr, plen)) != NULL((void *)0)) { |
| 1446 | /* same interface found */ |
| 1447 | /* need check if something changed */ |
| 1448 | /* XXX not yet implemented */ |
| 1449 | return; |
| 1450 | } |
| 1451 | /* |
| 1452 | * New address is found |
| 1453 | */ |
| 1454 | if ((ifa = calloc(1, sizeof(struct ifac))) == NULL((void *)0)) { |
| 1455 | fatal("calloc: struct ifac"); |
| 1456 | /*NOTREACHED*/ |
| 1457 | } |
| 1458 | ifa->ifa_conf = ifcp; |
| 1459 | ifa->ifa_next = ifcp->ifc_addr; |
| 1460 | ifcp->ifc_addr = ifa; |
| 1461 | ifa->ifa_addr = sin6->sin6_addr; |
| 1462 | ifa->ifa_plen = plen; |
| 1463 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { |
| 1464 | ifr.ifr_addrifr_ifru.ifru_addr = *sin6; |
| 1465 | if (ioctl(s, SIOCGIFDSTADDR_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct in6_ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((34))), (char *)&ifr) == -1) { |
| 1466 | fatal("ioctl: SIOCGIFDSTADDR_IN6"); |
| 1467 | /*NOTREACHED*/ |
| 1468 | } |
| 1469 | ifa->ifa_raddr = ifr.ifr_dstaddrifr_ifru.ifru_dstaddr.sin6_addr; |
| 1470 | inet_ntop(AF_INET624, (void *)&ifa->ifa_raddr, buf, sizeof(buf)); |
| 1471 | log_debug("found address %s/%d -- %s", |
| 1472 | inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen, buf); |
| 1473 | } else { |
| 1474 | log_debug("found address %s/%d", |
| 1475 | inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen); |
| 1476 | } |
| 1477 | if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)(((&ifa->ifa_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ifa->ifa_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { |
| 1478 | ifcp->ifc_mylladdr = ifa->ifa_addr; |
| 1479 | ifcp->ifc_index = IN6_LINKLOCAL_IFINDEX(ifa->ifa_addr)((ifa->ifa_addr).__u6_addr.__u6_addr8[2] << 8 | (ifa ->ifa_addr).__u6_addr.__u6_addr8[3]); |
| 1480 | memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len); |
| 1481 | SET_IN6_LINKLOCAL_IFINDEX(ifcp->ifc_ripsin.sin6_addr,do { (ifcp->ifc_ripsin.sin6_addr).__u6_addr.__u6_addr8[2] = ((ifcp->ifc_index) >> 8) & 0xff; (ifcp->ifc_ripsin .sin6_addr).__u6_addr.__u6_addr8[3] = (ifcp->ifc_index) & 0xff; } while (0) |
| 1482 | ifcp->ifc_index)do { (ifcp->ifc_ripsin.sin6_addr).__u6_addr.__u6_addr8[2] = ((ifcp->ifc_index) >> 8) & 0xff; (ifcp->ifc_ripsin .sin6_addr).__u6_addr.__u6_addr8[3] = (ifcp->ifc_index) & 0xff; } while (0); |
| 1483 | setindex2ifc(ifcp->ifc_index, ifcp); |
| 1484 | ifcp->ifc_mtu = getifmtu(ifcp->ifc_index); |
| 1485 | if (ifcp->ifc_mtu > RIP6_MAXMTU1500) |
| 1486 | ifcp->ifc_mtu = RIP6_MAXMTU1500; |
| 1487 | if (ioctl(s, SIOCGIFMETRIC(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((23))), (char *)&ifr) == -1) { |
| 1488 | fatal("ioctl: SIOCGIFMETRIC"); |
| 1489 | /*NOTREACHED*/ |
| 1490 | } |
| 1491 | ifcp->ifc_metric = ifr.ifr_metricifr_ifru.ifru_metric; |
| 1492 | log_debug("\tindex: %d, mtu: %d, metric: %d", |
| 1493 | ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric); |
| 1494 | } else |
| 1495 | ifcp->ifc_cflags |= IFC_CHANGED1; |
| 1496 | } |
| 1497 | |
| 1498 | /* |
| 1499 | * Receive and process routing messages. |
| 1500 | * Update interface information as necesssary. |
| 1501 | */ |
| 1502 | void |
| 1503 | rtrecv(void) |
| 1504 | { |
| 1505 | char buf[BUFSIZ1024]; |
| 1506 | char *p, *q; |
| 1507 | struct rt_msghdr *rtm; |
| 1508 | struct ifa_msghdr *ifam; |
| 1509 | struct if_msghdr *ifm; |
| 1510 | int len; |
| 1511 | struct ifc *ifcp, *ic; |
| 1512 | int iface = 0, rtable = 0; |
| 1513 | struct sockaddr_in6 *rta[RTAX_MAX15]; |
| 1514 | struct sockaddr_in6 mask; |
| 1515 | int i, addrs; |
| 1516 | struct riprt *rrt; |
| 1517 | |
| 1518 | if ((len = read(rtsock, buf, sizeof(buf))) == -1) { |
| 1519 | perror("read from rtsock"); |
| 1520 | exit(1); |
| 1521 | } |
| 1522 | if (len < sizeof(*rtm)) { |
| 1523 | log_debug("short read from rtsock: %d (should be > %zu)", |
| 1524 | len, sizeof(*rtm)); |
| 1525 | return; |
| 1526 | } |
| 1527 | if (dflag >= 2) { |
| 1528 | log_debug("rtmsg:"); |
| 1529 | for (i = 0; i < len; i++) { |
| 1530 | log_enqueue("%02x ", buf[i] & 0xff); |
| 1531 | if (i % 16 == 15) |
| 1532 | log_debug(""); |
| 1533 | } |
| 1534 | log_debug(""); |
| 1535 | } |
| 1536 | |
| 1537 | p = buf; |
| 1538 | /* safety against bogus message */ |
| 1539 | if (((struct rt_msghdr *)p)->rtm_msglen <= 0) { |
| 1540 | log_debug("bogus rtmsg: length=%d", |
| 1541 | ((struct rt_msghdr *)p)->rtm_msglen); |
| 1542 | return; |
| 1543 | } |
| 1544 | if (((struct rt_msghdr *)p)->rtm_version != RTM_VERSION5) |
| 1545 | return; |
| 1546 | |
| 1547 | rtm = NULL((void *)0); |
| 1548 | ifam = NULL((void *)0); |
| 1549 | ifm = NULL((void *)0); |
| 1550 | switch (((struct rt_msghdr *)p)->rtm_type) { |
| 1551 | case RTM_NEWADDR0xc: |
| 1552 | case RTM_DELADDR0xd: |
| 1553 | ifam = (struct ifa_msghdr *)p; |
| 1554 | addrs = ifam->ifam_addrs; |
| 1555 | q = (char *)(ifam + 1); |
| 1556 | break; |
| 1557 | case RTM_IFINFO0xe: |
| 1558 | ifm = (struct if_msghdr *)p; |
| 1559 | addrs = ifm->ifm_addrs; |
| 1560 | q = (char *)(ifm + 1); |
| 1561 | break; |
| 1562 | default: |
| 1563 | rtm = (struct rt_msghdr *)p; |
| 1564 | addrs = rtm->rtm_addrs; |
| 1565 | q = (char *)(p + rtm->rtm_hdrlen); |
| 1566 | if (rtm->rtm_pid == pid) { |
| 1567 | #if 0 |
| 1568 | log_debug("rtmsg looped back to me, ignored"); |
| 1569 | #endif |
| 1570 | return; |
| 1571 | } |
| 1572 | break; |
| 1573 | } |
| 1574 | memset(&rta, 0, sizeof(rta)); |
| 1575 | for (i = 0; i < RTAX_MAX15; i++) { |
| 1576 | if (addrs & (1 << i)) { |
| 1577 | rta[i] = (struct sockaddr_in6 *)q; |
| 1578 | q += ROUNDUP(rta[i]->sin6_len)((rta[i]->sin6_len) > 0 ? (1 + (((rta[i]->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long)); |
| 1579 | } |
| 1580 | } |
| 1581 | |
| 1582 | log_debug("rtsock: %s (addrs=%x)", |
| 1583 | rttypes((struct rt_msghdr *)p), addrs); |
| 1584 | if (dflag >= 2) { |
| 1585 | for (i = 0; |
| 1586 | i < ((struct rt_msghdr *)p)->rtm_msglen; |
| 1587 | i++) { |
| 1588 | log_enqueue("%02x ", p[i] & 0xff); |
| 1589 | if (i % 16 == 15) |
| 1590 | log_debug(""); |
| 1591 | } |
| 1592 | log_debug(""); |
| 1593 | } |
| 1594 | /* |
| 1595 | * Easy ones first. |
| 1596 | * |
| 1597 | * We may be able to optimize by using ifm->ifm_index or |
| 1598 | * ifam->ifam_index. For simplicity we don't do that here. |
| 1599 | */ |
| 1600 | switch (((struct rt_msghdr *)p)->rtm_type) { |
| 1601 | case RTM_NEWADDR0xc: |
| 1602 | case RTM_IFINFO0xe: |
| 1603 | iface++; |
| 1604 | return; |
| 1605 | case RTM_ADD0x1: |
| 1606 | rtable++; |
| 1607 | return; |
| 1608 | case RTM_MISS0x7: |
| 1609 | case RTM_RESOLVE0xb: |
| 1610 | case RTM_GET0x4: |
| 1611 | /* nothing to be done here */ |
| 1612 | log_debug("\tnothing to be done, ignored"); |
| 1613 | return; |
| 1614 | } |
| 1615 | |
| 1616 | #if 0 |
| 1617 | if (rta[RTAX_DST0] == NULL((void *)0)) { |
| 1618 | log_debug("\tno destination, ignored"); |
| 1619 | return; |
| 1620 | } |
| 1621 | if (rta[RTAX_DST0]->sin6_family != AF_INET624) { |
| 1622 | log_debug("\taf mismatch, ignored"); |
| 1623 | return; |
| 1624 | } |
| 1625 | if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)(((&rta[0]->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&rta[0]->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { |
| 1626 | log_debug("\tlinklocal destination, ignored"); |
| 1627 | return; |
| 1628 | } |
| 1629 | if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)(memcmp(&(&rta[0]->sin6_addr)->__u6_addr.__u6_addr8 [0], &(&in6addr_loopback)->__u6_addr.__u6_addr8[0] , sizeof(struct in6_addr)) == 0)) { |
| 1630 | log_debug("\tloopback destination, ignored"); |
| 1631 | return; /* Loopback */ |
| 1632 | } |
| 1633 | if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)((&rta[0]->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff )) { |
| 1634 | log_debug("\tmulticast destination, ignored"); |
| 1635 | return; |
| 1636 | } |
| 1637 | #endif |
| 1638 | |
| 1639 | /* hard ones */ |
| 1640 | switch (((struct rt_msghdr *)p)->rtm_type) { |
| 1641 | case RTM_NEWADDR0xc: |
| 1642 | case RTM_IFINFO0xe: |
| 1643 | case RTM_ADD0x1: |
| 1644 | case RTM_MISS0x7: |
| 1645 | case RTM_RESOLVE0xb: |
| 1646 | case RTM_GET0x4: |
| 1647 | /* should already be handled */ |
| 1648 | fatalx("rtrecv: never reach here"); |
| 1649 | /*NOTREACHED*/ |
| 1650 | case RTM_DELETE0x2: |
| 1651 | if (!rta[RTAX_DST0] || !rta[RTAX_GATEWAY1]) { |
| 1652 | log_debug("\tsome of dst/gw/netmask are " |
| 1653 | "unavailable, ignored"); |
| 1654 | break; |
| 1655 | } |
| 1656 | if ((rtm->rtm_flags & RTF_HOST0x4) != 0) { |
| 1657 | mask.sin6_len = sizeof(mask); |
| 1658 | memset(&mask.sin6_addr, 0xff, |
| 1659 | sizeof(mask.sin6_addr)); |
| 1660 | rta[RTAX_NETMASK2] = &mask; |
| 1661 | } else if (!rta[RTAX_NETMASK2]) { |
| 1662 | log_debug("\tsome of dst/gw/netmask are " |
| 1663 | "unavailable, ignored"); |
| 1664 | break; |
| 1665 | } |
| 1666 | if (rt_del(rta[RTAX_DST0], rta[RTAX_GATEWAY1], |
| 1667 | rta[RTAX_NETMASK2]) == 0) { |
| 1668 | rtable++; /*just to be sure*/ |
| 1669 | } |
| 1670 | break; |
| 1671 | case RTM_CHANGE0x3: |
| 1672 | case RTM_REDIRECT0x6: |
| 1673 | log_debug("\tnot supported yet, ignored"); |
| 1674 | break; |
| 1675 | case RTM_DELADDR0xd: |
| 1676 | if (!rta[RTAX_NETMASK2] || !rta[RTAX_IFA5]) { |
| 1677 | log_debug("\tno netmask or ifa given, ignored"); |
| 1678 | break; |
| 1679 | } |
| 1680 | if (ifam->ifam_index < nindex2ifc) |
| 1681 | ifcp = index2ifc[ifam->ifam_index]; |
| 1682 | else |
| 1683 | ifcp = NULL((void *)0); |
| 1684 | if (!ifcp) { |
| 1685 | log_debug("\tinvalid ifam_index %d, ignored", |
| 1686 | ifam->ifam_index); |
| 1687 | break; |
| 1688 | } |
| 1689 | if (!rt_deladdr(ifcp, rta[RTAX_IFA5], rta[RTAX_NETMASK2])) |
| 1690 | iface++; |
| 1691 | break; |
| 1692 | } |
| 1693 | |
| 1694 | if (iface) { |
| 1695 | log_debug("rtsock: reconfigure interfaces, refresh interface routes"); |
| 1696 | ifconfig(); |
| 1697 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) |
| 1698 | if (ifcp->ifc_cflags & IFC_CHANGED1) { |
| 1699 | if (ifrt(ifcp, 1)) { |
| 1700 | for (ic = ifc; ic; ic = ic->ifc_next) { |
| 1701 | if (ifcp->ifc_index == ic->ifc_index) |
| 1702 | continue; |
| 1703 | if (ic->ifc_flags & IFF_UP0x1) |
| 1704 | ripsend(ic, &ic->ifc_ripsin, |
| 1705 | RRTF_CHANGED0x80000000); |
| 1706 | } |
| 1707 | /* Reset the flag */ |
| 1708 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) |
| 1709 | rrt->rrt_rflags &= ~RRTF_CHANGED0x80000000; |
| 1710 | } |
| 1711 | ifcp->ifc_cflags &= ~IFC_CHANGED1; |
| 1712 | } |
| 1713 | } |
| 1714 | if (rtable) { |
| 1715 | log_debug("rtsock: read routing table again"); |
| 1716 | krtread(1); |
| 1717 | } |
| 1718 | } |
| 1719 | |
| 1720 | /* |
| 1721 | * remove specified route from the internal routing table. |
| 1722 | */ |
| 1723 | int |
| 1724 | rt_del(const struct sockaddr_in6 *sdst, const struct sockaddr_in6 *sgw, |
| 1725 | const struct sockaddr_in6 *smask) |
| 1726 | { |
| 1727 | const struct in6_addr *dst = NULL((void *)0); |
| 1728 | const struct in6_addr *gw = NULL((void *)0); |
| 1729 | int prefix; |
| 1730 | struct netinfo6 ni6; |
| 1731 | struct riprt *rrt = NULL((void *)0); |
| 1732 | time_t t_lifetime; |
| 1733 | |
| 1734 | if (sdst->sin6_family != AF_INET624) { |
| 1735 | log_debug("\tother AF, ignored"); |
| 1736 | return -1; |
| 1737 | } |
| 1738 | if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr)(((&sdst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sdst->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80)) |
| 1739 | || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback)(memcmp(&(&sdst->sin6_addr)->__u6_addr.__u6_addr8 [0], &(&in6addr_loopback)->__u6_addr.__u6_addr8[0] , sizeof(struct in6_addr)) == 0) |
| 1740 | || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)((&sdst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff )) { |
| 1741 | log_debug("\taddress %s not interesting, ignored", |
| 1742 | inet6_n2p(&sdst->sin6_addr)); |
| 1743 | return -1; |
| 1744 | } |
| 1745 | dst = &sdst->sin6_addr; |
| 1746 | if (sgw->sin6_family == AF_INET624) { |
| 1747 | /* easy case */ |
| 1748 | gw = &sgw->sin6_addr; |
| 1749 | prefix = sin6mask2len(smask); |
| 1750 | } else if (sgw->sin6_family == AF_LINK18) { |
| 1751 | /* |
| 1752 | * Interface route... a hard case. We need to get the prefix |
| 1753 | * length from the kernel, but we now are parsing rtmsg. |
| 1754 | * We'll purge matching routes from my list, then get the |
| 1755 | * fresh list. |
| 1756 | */ |
| 1757 | struct riprt *longest; |
| 1758 | log_debug("\t%s is a interface route, guessing prefixlen", |
| 1759 | inet6_n2p(dst)); |
| 1760 | longest = NULL((void *)0); |
| 1761 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { |
| 1762 | if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&sdst->sin6_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) |
| 1763 | &sdst->sin6_addr)(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&sdst->sin6_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) |
| 1764 | && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == (__uint32_t)(__builtin_constant_p (1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t)(1) & 0xff000000 ) >> 24) : __swap32md(1))))) { |
| 1765 | if (!longest |
| 1766 | || longest->rrt_info.rip6_plen < |
| 1767 | rrt->rrt_info.rip6_plen) { |
| 1768 | longest = rrt; |
| 1769 | } |
| 1770 | } |
| 1771 | } |
| 1772 | rrt = longest; |
| 1773 | if (!rrt) { |
| 1774 | log_debug("\tno matching interface route found"); |
| 1775 | return -1; |
| 1776 | } |
| 1777 | gw = &in6addr_loopback; |
| 1778 | prefix = rrt->rrt_info.rip6_plen; |
| 1779 | } else { |
| 1780 | log_debug("\tunsupported af: (gw=%d)", sgw->sin6_family); |
| 1781 | return -1; |
| 1782 | } |
| 1783 | |
| 1784 | log_enqueue("\tdeleting %s/%d ", inet6_n2p(dst), prefix); |
| 1785 | log_debug("gw %s", inet6_n2p(gw)); |
| 1786 | t_lifetime = time(NULL((void *)0)) - RIP_LIFETIME180; |
| 1787 | /* age route for interface address */ |
| 1788 | memset(&ni6, 0, sizeof(ni6)); |
| 1789 | ni6.rip6_dest = *dst; |
| 1790 | ni6.rip6_plen = prefix; |
| 1791 | applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ |
| 1792 | log_debug("\tfind route %s/%d", inet6_n2p(&ni6.rip6_dest), |
| 1793 | ni6.rip6_plen); |
| 1794 | if (!rrt && (rrt = rtsearch(&ni6, NULL((void *)0))) == NULL((void *)0)) { |
| 1795 | log_debug("\tno route found"); |
| 1796 | return -1; |
| 1797 | } |
| 1798 | #if 0 |
| 1799 | if ((rrt->rrt_flags & RTF_STATIC0x800) == 0) { |
| 1800 | log_debug("\tyou can delete static routes only"); |
| 1801 | } else |
| 1802 | #endif |
| 1803 | if (!IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, gw)(memcmp(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8[0 ], &(gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { |
| 1804 | log_enqueue("\tgw mismatch: %s <-> ", |
| 1805 | inet6_n2p(&rrt->rrt_gw)); |
| 1806 | log_debug("%s", inet6_n2p(gw)); |
| 1807 | } else { |
| 1808 | log_debug("\troute found, age it"); |
| 1809 | if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { |
| 1810 | rrt->rrt_t = t_lifetime; |
| 1811 | rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; |
| 1812 | } |
| 1813 | } |
| 1814 | return 0; |
| 1815 | } |
| 1816 | |
| 1817 | /* |
| 1818 | * remove specified address from internal interface/routing table. |
| 1819 | */ |
| 1820 | int |
| 1821 | rt_deladdr(struct ifc *ifcp, const struct sockaddr_in6 *sifa, |
| 1822 | const struct sockaddr_in6 *smask) |
| 1823 | { |
| 1824 | const struct in6_addr *addr = NULL((void *)0); |
| 1825 | int prefix; |
| 1826 | struct ifac *ifa = NULL((void *)0); |
| 1827 | struct netinfo6 ni6; |
| 1828 | struct riprt *rrt = NULL((void *)0); |
| 1829 | time_t t_lifetime; |
| 1830 | int updated = 0; |
| 1831 | |
| 1832 | if (sifa->sin6_family != AF_INET624) { |
| 1833 | log_debug("\tother AF, ignored"); |
| 1834 | return -1; |
| 1835 | } |
| 1836 | addr = &sifa->sin6_addr; |
| 1837 | prefix = sin6mask2len(smask); |
| 1838 | |
| 1839 | log_debug("\tdeleting %s/%d from %s", |
| 1840 | inet6_n2p(addr), prefix, ifcp->ifc_name); |
| 1841 | ifa = ifa_match(ifcp, addr, prefix); |
| 1842 | if (!ifa) { |
| 1843 | log_debug("\tno matching ifa found for %s/%d on %s", |
| 1844 | inet6_n2p(addr), prefix, ifcp->ifc_name); |
| 1845 | return -1; |
| 1846 | } |
| 1847 | if (ifa->ifa_conf != ifcp) { |
| 1848 | log_debug("\taddress table corrupt: back pointer does not match " |
| 1849 | "(%s != %s)", |
| 1850 | ifcp->ifc_name, ifa->ifa_conf->ifc_name); |
| 1851 | return -1; |
| 1852 | } |
| 1853 | /* remove ifa from interface */ |
| 1854 | if (ifcp->ifc_addr == ifa) |
| 1855 | ifcp->ifc_addr = ifa->ifa_next; |
| 1856 | else { |
| 1857 | struct ifac *p; |
| 1858 | for (p = ifcp->ifc_addr; p; p = p->ifa_next) { |
| 1859 | if (p->ifa_next == ifa) { |
| 1860 | p->ifa_next = ifa->ifa_next; |
| 1861 | break; |
| 1862 | } |
| 1863 | } |
| 1864 | } |
| 1865 | ifa->ifa_next = NULL((void *)0); |
| 1866 | ifa->ifa_conf = NULL((void *)0); |
| 1867 | t_lifetime = time(NULL((void *)0)) - RIP_LIFETIME180; |
| 1868 | /* age route for interface address */ |
| 1869 | memset(&ni6, 0, sizeof(ni6)); |
| 1870 | ni6.rip6_dest = ifa->ifa_addr; |
| 1871 | ni6.rip6_plen = ifa->ifa_plen; |
| 1872 | applyplen(&ni6.rip6_dest, ni6.rip6_plen); |
| 1873 | log_debug("\tfind interface route %s/%d on %d", |
| 1874 | inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index); |
| 1875 | if ((rrt = rtsearch(&ni6, NULL((void *)0))) != NULL((void *)0)) { |
| 1876 | struct in6_addr none; |
| 1877 | memset(&none, 0, sizeof(none)); |
| 1878 | if (rrt->rrt_index == ifcp->ifc_index && |
| 1879 | (IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &none)(memcmp(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8[0 ], &(&none)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0) || |
| 1880 | IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == (__uint32_t)(__builtin_constant_p (1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t)(1) & 0xff000000 ) >> 24) : __swap32md(1)))))) { |
| 1881 | log_debug("\troute found, age it"); |
| 1882 | if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { |
| 1883 | rrt->rrt_t = t_lifetime; |
| 1884 | rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; |
| 1885 | } |
| 1886 | updated++; |
| 1887 | } else { |
| 1888 | log_debug("\tnon-interface route found: %s/%d on %d", |
| 1889 | inet6_n2p(&rrt->rrt_info.rip6_dest), |
| 1890 | rrt->rrt_info.rip6_plen, |
| 1891 | rrt->rrt_index); |
| 1892 | } |
| 1893 | } else |
| 1894 | log_debug("\tno interface route found"); |
| 1895 | /* age route for p2p destination */ |
| 1896 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { |
| 1897 | memset(&ni6, 0, sizeof(ni6)); |
| 1898 | ni6.rip6_dest = ifa->ifa_raddr; |
| 1899 | ni6.rip6_plen = 128; |
| 1900 | applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ |
| 1901 | log_debug("\tfind p2p route %s/%d on %d", |
| 1902 | inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, |
| 1903 | ifcp->ifc_index); |
| 1904 | if ((rrt = rtsearch(&ni6, NULL((void *)0))) != NULL((void *)0)) { |
| 1905 | if (rrt->rrt_index == ifcp->ifc_index && |
| 1906 | IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &ifa->ifa_addr)(memcmp(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8[0 ], &(&ifa->ifa_addr)->__u6_addr.__u6_addr8[0], sizeof (struct in6_addr)) == 0)) { |
| 1907 | log_debug("\troute found, age it"); |
| 1908 | if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { |
| 1909 | rrt->rrt_t = t_lifetime; |
| 1910 | rrt->rrt_info.rip6_metric = |
| 1911 | HOPCNT_INFINITY616; |
| 1912 | updated++; |
| 1913 | } |
| 1914 | } else { |
| 1915 | log_debug("\tnon-p2p route found: %s/%d on %d", |
| 1916 | inet6_n2p(&rrt->rrt_info.rip6_dest), |
| 1917 | rrt->rrt_info.rip6_plen, |
| 1918 | rrt->rrt_index); |
| 1919 | } |
| 1920 | } else |
| 1921 | log_debug("\tno p2p route found"); |
| 1922 | } |
| 1923 | return updated ? 0 : -1; |
| 1924 | } |
| 1925 | |
| 1926 | /* |
| 1927 | * Get each interface address and put those interface routes to the route |
| 1928 | * list. |
| 1929 | */ |
| 1930 | int |
| 1931 | ifrt(struct ifc *ifcp, int again) |
| 1932 | { |
| 1933 | struct ifac *ifa; |
| 1934 | struct riprt *rrt = NULL((void *)0), *search_rrt, *prev_rrt, *loop_rrt; |
| 1935 | struct netinfo6 *np; |
| 1936 | time_t t_lifetime; |
| 1937 | int need_trigger = 0; |
| 1938 | |
| 1939 | #if 0 |
| 1940 | if (ifcp->ifc_flags & IFF_LOOPBACK0x8) |
| 1941 | return 0; /* ignore loopback */ |
| 1942 | #endif |
| 1943 | |
| 1944 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { |
| 1945 | ifrt_p2p(ifcp, again); |
| 1946 | return 0; |
| 1947 | } |
| 1948 | |
| 1949 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { |
| 1950 | if (IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)(((&ifa->ifa_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ifa->ifa_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { |
| 1951 | #if 0 |
| 1952 | log_debug("route: %s on %s: " |
| 1953 | "skip linklocal interface address", |
| 1954 | inet6_n2p(&ifa->ifa_addr), ifcp->ifc_name); |
| 1955 | #endif |
| 1956 | continue; |
| 1957 | } |
| 1958 | if (IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_addr)((*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& ifa->ifa_addr)->__u6_addr.__u6_addr8[12]) == 0))) { |
| 1959 | #if 0 |
| 1960 | log_debug("route: %s: skip unspec interface address", |
| 1961 | ifcp->ifc_name); |
| 1962 | #endif |
| 1963 | continue; |
| 1964 | } |
| 1965 | if (IN6_IS_ADDR_LOOPBACK(&ifa->ifa_addr)((*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& ifa->ifa_addr)->__u6_addr.__u6_addr8[12]) == (__uint32_t )(__builtin_constant_p(1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t )(1) & 0xff000000) >> 24) : __swap32md(1))))) { |
| 1966 | #if 0 |
| 1967 | log_debug("route: %s: skip loopback address", |
| 1968 | ifcp->ifc_name); |
| 1969 | #endif |
| 1970 | continue; |
| 1971 | } |
| 1972 | if (ifcp->ifc_flags & IFF_UP0x1) { |
| 1973 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void *)0)) |
| 1974 | fatal("calloc: struct riprt"); |
| 1975 | rrt->rrt_index = ifcp->ifc_index; |
| 1976 | rrt->rrt_t = 0; /* don't age */ |
| 1977 | rrt->rrt_info.rip6_dest = ifa->ifa_addr; |
| 1978 | rrt->rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); |
| 1979 | rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; |
| 1980 | rrt->rrt_info.rip6_plen = ifa->ifa_plen; |
| 1981 | if (ifa->ifa_plen == 128) |
| 1982 | rrt->rrt_flags = RTF_HOST0x4; |
| 1983 | else |
| 1984 | rrt->rrt_flags = RTF_CLONING0x100; |
| 1985 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; |
| 1986 | applyplen(&rrt->rrt_info.rip6_dest, ifa->ifa_plen); |
| 1987 | memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); |
| 1988 | rrt->rrt_gw = ifa->ifa_addr; |
| 1989 | np = &rrt->rrt_info; |
| 1990 | search_rrt = rtsearch(np, &prev_rrt); |
| 1991 | if (search_rrt != NULL((void *)0)) { |
| 1992 | if (search_rrt->rrt_info.rip6_metric <= |
| 1993 | rrt->rrt_info.rip6_metric) { |
| 1994 | /* Already have better route */ |
| 1995 | if (!again) { |
| 1996 | log_debug("route: %s/%d: " |
| 1997 | "already registered (%s)", |
| 1998 | inet6_n2p(&np->rip6_dest), np->rip6_plen, |
| 1999 | ifcp->ifc_name); |
| 2000 | } |
| 2001 | goto next; |
| 2002 | } |
| 2003 | |
| 2004 | if (prev_rrt) |
| 2005 | prev_rrt->rrt_next = rrt->rrt_next; |
| 2006 | else |
| 2007 | riprt = rrt->rrt_next; |
| 2008 | delroute(&rrt->rrt_info, &rrt->rrt_gw); |
| 2009 | } |
| 2010 | /* Attach the route to the list */ |
| 2011 | log_debug("route: %s/%d: register route (%s)", |
| 2012 | inet6_n2p(&np->rip6_dest), np->rip6_plen, |
| 2013 | ifcp->ifc_name); |
| 2014 | rrt->rrt_next = riprt; |
| 2015 | riprt = rrt; |
| 2016 | addroute(rrt, &rrt->rrt_gw, ifcp); |
| 2017 | rrt = NULL((void *)0); |
| 2018 | sendrequest(ifcp); |
| 2019 | ripsend(ifcp, &ifcp->ifc_ripsin, 0); |
| 2020 | need_trigger = 1; |
| 2021 | } else { |
| 2022 | for (loop_rrt = riprt; loop_rrt; loop_rrt = loop_rrt->rrt_next) { |
| 2023 | if (loop_rrt->rrt_index == ifcp->ifc_index) { |
| 2024 | t_lifetime = time(NULL((void *)0)) - RIP_LIFETIME180; |
| 2025 | if (loop_rrt->rrt_t == 0 || loop_rrt->rrt_t > t_lifetime) { |
| 2026 | loop_rrt->rrt_t = t_lifetime; |
| 2027 | loop_rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; |
| 2028 | loop_rrt->rrt_rflags |= RRTF_CHANGED0x80000000; |
| 2029 | need_trigger = 1; |
| 2030 | } |
| 2031 | } |
| 2032 | } |
| 2033 | } |
| 2034 | next: |
| 2035 | free(rrt); |
| 2036 | } |
| 2037 | return need_trigger; |
| 2038 | } |
| 2039 | |
| 2040 | /* |
| 2041 | * there are couple of p2p interface routing models. "behavior" lets |
| 2042 | * you pick one. it looks that gated behavior fits best with BSDs, |
| 2043 | * since BSD kernels do not look at prefix length on p2p interfaces. |
| 2044 | */ |
| 2045 | void |
| 2046 | ifrt_p2p(struct ifc *ifcp, int again) |
| 2047 | { |
| 2048 | struct ifac *ifa; |
| 2049 | struct riprt *rrt, *orrt, *prevrrt; |
| 2050 | struct netinfo6 *np; |
| 2051 | struct in6_addr addr, dest; |
| 2052 | int advert, ignore, i; |
| 2053 | #define P2PADVERT_NETWORK 1 |
| 2054 | #define P2PADVERT_ADDR 2 |
| 2055 | #define P2PADVERT_DEST 4 |
| 2056 | #define P2PADVERT_MAX 4 |
| 2057 | const enum { CISCO, GATED, ROUTE6D } behavior = GATED; |
| 2058 | const char *category = ""; |
| 2059 | const char *noadv; |
| 2060 | |
| 2061 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { |
| 2062 | addr = ifa->ifa_addr; |
| 2063 | dest = ifa->ifa_raddr; |
| 2064 | applyplen(&addr, ifa->ifa_plen); |
| 2065 | applyplen(&dest, ifa->ifa_plen); |
| 2066 | advert = ignore = 0; |
| 2067 | switch (behavior) { |
| 2068 | case CISCO: |
| 2069 | /* |
| 2070 | * honor addr/plen, just like normal shared medium |
| 2071 | * interface. this may cause trouble if you reuse |
| 2072 | * addr/plen on other interfaces. |
| 2073 | * |
| 2074 | * advertise addr/plen. |
| 2075 | */ |
| 2076 | advert |= P2PADVERT_NETWORK; |
| 2077 | break; |
| 2078 | case GATED: |
| 2079 | /* |
| 2080 | * prefixlen on p2p interface is meaningless. |
| 2081 | * advertise addr/128 and dest/128. |
| 2082 | * |
| 2083 | * do not install network route to route6d routing |
| 2084 | * table (if we do, it would prevent route installation |
| 2085 | * for other p2p interface that shares addr/plen). |
| 2086 | * |
| 2087 | * XXX what should we do if dest is ::? it will not |
| 2088 | * get announced anyways (see following filter), |
| 2089 | * but we need to think. |
| 2090 | */ |
| 2091 | advert |= P2PADVERT_ADDR; |
| 2092 | advert |= P2PADVERT_DEST; |
| 2093 | ignore |= P2PADVERT_NETWORK; |
| 2094 | break; |
| 2095 | case ROUTE6D: |
| 2096 | /* |
| 2097 | * just for testing. actually the code is redundant |
| 2098 | * given the current p2p interface address assignment |
| 2099 | * rule for kame kernel. |
| 2100 | * |
| 2101 | * intent: |
| 2102 | * A/n -> announce A/n |
| 2103 | * A B/n, A and B share prefix -> A/n (= B/n) |
| 2104 | * A B/n, do not share prefix -> A/128 and B/128 |
| 2105 | * actually, A/64 and A B/128 are the only cases |
| 2106 | * permitted by the kernel: |
| 2107 | * A/64 -> A/64 |
| 2108 | * A B/128 -> A/128 and B/128 |
| 2109 | */ |
| 2110 | if (!IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_raddr)((*(const u_int32_t *)(const void *)(&(&ifa->ifa_raddr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_raddr)->__u6_addr .__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_raddr)->__u6_addr.__u6_addr8[8] ) == 0) && (*(const u_int32_t *)(const void *)(&( &ifa->ifa_raddr)->__u6_addr.__u6_addr8[12]) == 0))) { |
| 2111 | if (IN6_ARE_ADDR_EQUAL(&addr, &dest)(memcmp(&(&addr)->__u6_addr.__u6_addr8[0], &(& dest)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) |
| 2112 | advert |= P2PADVERT_NETWORK; |
| 2113 | else { |
| 2114 | advert |= P2PADVERT_ADDR; |
| 2115 | advert |= P2PADVERT_DEST; |
| 2116 | ignore |= P2PADVERT_NETWORK; |
| 2117 | } |
| 2118 | } else |
| 2119 | advert |= P2PADVERT_NETWORK; |
| 2120 | break; |
| 2121 | } |
| 2122 | |
| 2123 | for (i = 1; i <= P2PADVERT_MAX; i *= 2) { |
| 2124 | if ((ignore & i) != 0) |
| 2125 | continue; |
| 2126 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void *)0)) { |
| 2127 | fatal("calloc: struct riprt"); |
| 2128 | /*NOTREACHED*/ |
| 2129 | } |
| 2130 | rrt->rrt_index = ifcp->ifc_index; |
| 2131 | rrt->rrt_t = 0; /* don't age */ |
| 2132 | switch (i) { |
| 2133 | case P2PADVERT_NETWORK: |
| 2134 | rrt->rrt_info.rip6_dest = ifa->ifa_addr; |
| 2135 | rrt->rrt_info.rip6_plen = ifa->ifa_plen; |
| 2136 | applyplen(&rrt->rrt_info.rip6_dest, |
| 2137 | ifa->ifa_plen); |
| 2138 | category = "network"; |
| 2139 | break; |
| 2140 | case P2PADVERT_ADDR: |
| 2141 | rrt->rrt_info.rip6_dest = ifa->ifa_addr; |
| 2142 | rrt->rrt_info.rip6_plen = 128; |
| 2143 | rrt->rrt_gw = in6addr_loopback; |
| 2144 | category = "addr"; |
| 2145 | break; |
| 2146 | case P2PADVERT_DEST: |
| 2147 | rrt->rrt_info.rip6_dest = ifa->ifa_raddr; |
| 2148 | rrt->rrt_info.rip6_plen = 128; |
| 2149 | rrt->rrt_gw = ifa->ifa_addr; |
| 2150 | category = "dest"; |
| 2151 | break; |
| 2152 | } |
| 2153 | if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_info .rip6_dest)->__u6_addr.__u6_addr8[0]) == 0) && (*( const u_int32_t *)(const void *)(&(&rrt->rrt_info. rip6_dest)->__u6_addr.__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_info.rip6_dest )->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_info.rip6_dest)-> __u6_addr.__u6_addr8[12]) == 0)) || |
| 2154 | IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)(((&rrt->rrt_info.rip6_dest)->__u6_addr.__u6_addr8[ 0] == 0xfe) && (((&rrt->rrt_info.rip6_dest)-> __u6_addr.__u6_addr8[1] & 0xc0) == 0x80))) { |
| 2155 | #if 0 |
| 2156 | log_debug("route: %s: skip unspec/linklocal " |
| 2157 | "(%s on %s)", category, ifcp->ifc_name); |
| 2158 | #endif |
| 2159 | free(rrt); |
| 2160 | continue; |
| 2161 | } |
| 2162 | if ((advert & i) == 0) { |
| 2163 | rrt->rrt_rflags |= RRTF_NOADVERTISE0x10000000; |
| 2164 | noadv = ", NO-ADV"; |
| 2165 | } else |
| 2166 | noadv = ""; |
| 2167 | rrt->rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); |
| 2168 | rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; |
| 2169 | np = &rrt->rrt_info; |
| 2170 | orrt = rtsearch(np, &prevrrt); |
| 2171 | if (!orrt) { |
| 2172 | /* Attach the route to the list */ |
| 2173 | log_debug("route: %s/%d: register route " |
| 2174 | "(%s on %s%s)", |
| 2175 | inet6_n2p(&np->rip6_dest), np->rip6_plen, |
| 2176 | category, ifcp->ifc_name, noadv); |
| 2177 | rrt->rrt_next = riprt; |
| 2178 | riprt = rrt; |
| 2179 | } else if (rrt->rrt_index != orrt->rrt_index || |
| 2180 | rrt->rrt_info.rip6_metric != orrt->rrt_info.rip6_metric) { |
| 2181 | /* swap route */ |
| 2182 | rrt->rrt_next = orrt->rrt_next; |
| 2183 | if (prevrrt) |
| 2184 | prevrrt->rrt_next = rrt; |
| 2185 | else |
| 2186 | riprt = rrt; |
| 2187 | free(orrt); |
| 2188 | |
| 2189 | log_debug("route: %s/%d: update (%s on %s%s)", |
| 2190 | inet6_n2p(&np->rip6_dest), np->rip6_plen, |
| 2191 | category, ifcp->ifc_name, noadv); |
| 2192 | } else { |
| 2193 | /* Already found */ |
| 2194 | if (!again) { |
| 2195 | log_debug("route: %s/%d: " |
| 2196 | "already registered (%s on %s%s)", |
| 2197 | inet6_n2p(&np->rip6_dest), |
| 2198 | np->rip6_plen, category, |
| 2199 | ifcp->ifc_name, noadv); |
| 2200 | } |
| 2201 | free(rrt); |
| 2202 | } |
| 2203 | } |
| 2204 | } |
| 2205 | #undef P2PADVERT_NETWORK |
| 2206 | #undef P2PADVERT_ADDR |
| 2207 | #undef P2PADVERT_DEST |
| 2208 | #undef P2PADVERT_MAX |
| 2209 | } |
| 2210 | |
| 2211 | int |
| 2212 | getifmtu(int ifindex) |
| 2213 | { |
| 2214 | int mib[6]; |
| 2215 | char *buf = NULL((void *)0); |
| 2216 | size_t needed; |
| 2217 | struct if_msghdr *ifm; |
| 2218 | int mtu; |
| 2219 | |
| 2220 | mib[0] = CTL_NET4; |
| 2221 | mib[1] = PF_ROUTE17; |
| 2222 | mib[2] = 0; |
| 2223 | mib[3] = AF_INET624; |
| 2224 | mib[4] = NET_RT_IFLIST3; |
| 2225 | mib[5] = ifindex; |
| 2226 | while (1) { |
| 2227 | if (sysctl(mib, 6, NULL((void *)0), &needed, NULL((void *)0), 0) == -1) |
| 2228 | fatal("sysctl estimate NET_RT_IFLIST"); |
| 2229 | if (needed == 0) |
| 2230 | break; |
| 2231 | if ((buf = realloc(buf, needed)) == NULL((void *)0)) |
| 2232 | fatal(NULL((void *)0)); |
| 2233 | if (sysctl(mib, 6, buf, &needed, NULL((void *)0), 0) == -1) { |
| 2234 | if (errno(*__errno()) == ENOMEM12) |
| 2235 | continue; |
| 2236 | fatal("sysctl NET_RT_IFLIST"); |
| 2237 | } |
| 2238 | break; |
| 2239 | } |
| 2240 | ifm = (struct if_msghdr *)buf; |
| 2241 | mtu = ifm->ifm_data.ifi_mtu; |
| 2242 | free(buf); |
| 2243 | return mtu; |
| 2244 | } |
| 2245 | |
| 2246 | const char * |
| 2247 | rttypes(struct rt_msghdr *rtm) |
| 2248 | { |
| 2249 | #define RTTYPE(s, f) \ |
| 2250 | do { \ |
| 2251 | if (rtm->rtm_type == (f)) \ |
| 2252 | return (s); \ |
| 2253 | } while (0) |
| 2254 | RTTYPE("ADD", RTM_ADD0x1); |
| 2255 | RTTYPE("DELETE", RTM_DELETE0x2); |
| 2256 | RTTYPE("CHANGE", RTM_CHANGE0x3); |
| 2257 | RTTYPE("GET", RTM_GET0x4); |
| 2258 | RTTYPE("REDIRECT", RTM_REDIRECT0x6); |
| 2259 | RTTYPE("MISS", RTM_MISS0x7); |
| 2260 | RTTYPE("RESOLVE", RTM_RESOLVE0xb); |
| 2261 | RTTYPE("NEWADDR", RTM_NEWADDR0xc); |
| 2262 | RTTYPE("DELADDR", RTM_DELADDR0xd); |
| 2263 | RTTYPE("IFINFO", RTM_IFINFO0xe); |
| 2264 | #ifdef RTM_OIFINFO |
| 2265 | RTTYPE("OIFINFO", RTM_OIFINFO); |
| 2266 | #endif |
| 2267 | #ifdef RTM_IFANNOUNCE0xf |
| 2268 | RTTYPE("IFANNOUNCE", RTM_IFANNOUNCE0xf); |
| 2269 | #endif |
| 2270 | #ifdef RTM_NEWMADDR |
| 2271 | RTTYPE("NEWMADDR", RTM_NEWMADDR); |
| 2272 | #endif |
| 2273 | #ifdef RTM_DELMADDR |
| 2274 | RTTYPE("DELMADDR", RTM_DELMADDR); |
| 2275 | #endif |
| 2276 | #undef RTTYPE |
| 2277 | return NULL((void *)0); |
| 2278 | } |
| 2279 | |
| 2280 | const char * |
| 2281 | rtflags(struct rt_msghdr *rtm) |
| 2282 | { |
| 2283 | static char buf[BUFSIZ1024]; |
| 2284 | |
| 2285 | /* |
| 2286 | * letter conflict should be okay. painful when *BSD diverges... |
| 2287 | */ |
| 2288 | strlcpy(buf, "", sizeof(buf)); |
| 2289 | #define RTFLAG(s, f) \ |
| 2290 | do { \ |
| 2291 | if (rtm->rtm_flags & (f)) \ |
| 2292 | strlcat(buf, (s), sizeof(buf)); \ |
| 2293 | } while (0) |
| 2294 | RTFLAG("U", RTF_UP0x1); |
| 2295 | RTFLAG("G", RTF_GATEWAY0x2); |
| 2296 | RTFLAG("H", RTF_HOST0x4); |
| 2297 | RTFLAG("R", RTF_REJECT0x8); |
| 2298 | RTFLAG("D", RTF_DYNAMIC0x10); |
| 2299 | RTFLAG("M", RTF_MODIFIED0x20); |
| 2300 | RTFLAG("d", RTF_DONE0x40); |
| 2301 | RTFLAG("m", RTF_MULTICAST0x200); |
| 2302 | RTFLAG("C", RTF_CLONING0x100); |
| 2303 | RTFLAG("c", RTF_CLONED0x10000); |
| 2304 | RTFLAG("L", RTF_LLINFO0x400); |
| 2305 | RTFLAG("S", RTF_STATIC0x800); |
| 2306 | RTFLAG("B", RTF_BLACKHOLE0x1000); |
| 2307 | RTFLAG("3", RTF_PROTO30x2000); |
| 2308 | RTFLAG("2", RTF_PROTO20x4000); |
| 2309 | RTFLAG("1", RTF_PROTO10x8000); |
| 2310 | RTFLAG("b", RTF_BROADCAST0x400000); |
| 2311 | #undef RTFLAG |
| 2312 | return buf; |
| 2313 | } |
| 2314 | |
| 2315 | const char * |
| 2316 | ifflags(int flags) |
| 2317 | { |
| 2318 | static char buf[BUFSIZ1024]; |
| 2319 | |
| 2320 | strlcpy(buf, "", sizeof(buf)); |
| 2321 | #define IFFLAG(s, f) \ |
| 2322 | do { \ |
| 2323 | if (flags & (f)) { \ |
| 2324 | if (buf[0]) \ |
| 2325 | strlcat(buf, ",", sizeof(buf)); \ |
| 2326 | strlcat(buf, (s), sizeof(buf)); \ |
| 2327 | } \ |
| 2328 | } while (0) |
| 2329 | IFFLAG("UP", IFF_UP0x1); |
| 2330 | IFFLAG("BROADCAST", IFF_BROADCAST0x2); |
| 2331 | IFFLAG("DEBUG", IFF_DEBUG0x4); |
| 2332 | IFFLAG("LOOPBACK", IFF_LOOPBACK0x8); |
| 2333 | IFFLAG("POINTOPOINT", IFF_POINTOPOINT0x10); |
| 2334 | IFFLAG("STATICARP", IFF_STATICARP0x20); |
| 2335 | IFFLAG("RUNNING", IFF_RUNNING0x40); |
| 2336 | IFFLAG("NOARP", IFF_NOARP0x80); |
| 2337 | IFFLAG("PROMISC", IFF_PROMISC0x100); |
| 2338 | IFFLAG("ALLMULTI", IFF_ALLMULTI0x200); |
| 2339 | IFFLAG("OACTIVE", IFF_OACTIVE0x400); |
| 2340 | IFFLAG("SIMPLEX", IFF_SIMPLEX0x800); |
| 2341 | IFFLAG("LINK0", IFF_LINK00x1000); |
| 2342 | IFFLAG("LINK1", IFF_LINK10x2000); |
| 2343 | IFFLAG("LINK2", IFF_LINK20x4000); |
| 2344 | IFFLAG("MULTICAST", IFF_MULTICAST0x8000); |
| 2345 | #undef IFFLAG |
| 2346 | return buf; |
| 2347 | } |
| 2348 | |
| 2349 | void |
| 2350 | krtread(int again) |
| 2351 | { |
| 2352 | int mib[6]; |
| 2353 | size_t msize; |
| 2354 | char *buf, *p, *lim; |
| 2355 | struct rt_msghdr *rtm; |
| 2356 | int retry; |
| 2357 | const char *errmsg; |
| 2358 | |
| 2359 | retry = 0; |
| 2360 | buf = NULL((void *)0); |
| 2361 | mib[0] = CTL_NET4; |
| 2362 | mib[1] = PF_ROUTE17; |
| 2363 | mib[2] = 0; |
| 2364 | mib[3] = AF_INET624; /* Address family */ |
| 2365 | mib[4] = NET_RT_DUMP1; /* Dump the kernel routing table */ |
| 2366 | mib[5] = 0; /* No flags */ |
| 2367 | do { |
| 2368 | retry++; |
| 2369 | free(buf); |
| 2370 | buf = NULL((void *)0); |
| 2371 | errmsg = NULL((void *)0); |
| 2372 | if (sysctl(mib, 6, NULL((void *)0), &msize, NULL((void *)0), 0) == -1) { |
| 2373 | errmsg = "sysctl estimate"; |
| 2374 | continue; |
| 2375 | } |
| 2376 | if ((buf = malloc(msize)) == NULL((void *)0)) { |
| 2377 | errmsg = "malloc"; |
| 2378 | continue; |
| 2379 | } |
| 2380 | if (sysctl(mib, 6, buf, &msize, NULL((void *)0), 0) == -1) { |
| 2381 | errmsg = "sysctl NET_RT_DUMP"; |
| 2382 | continue; |
| 2383 | } |
| 2384 | } while (retry < 5 && errmsg != NULL((void *)0)); |
| 2385 | if (errmsg) { |
| 2386 | fatal(errmsg); |
| 2387 | /*NOTREACHED*/ |
| 2388 | } else if (1 < retry) |
| 2389 | log_info("NET_RT_DUMP %d retries", retry); |
| 2390 | |
| 2391 | lim = buf + msize; |
| 2392 | for (p = buf; p < lim; p += rtm->rtm_msglen) { |
| 2393 | rtm = (struct rt_msghdr *)p; |
| 2394 | if (rtm->rtm_version != RTM_VERSION5) |
| 2395 | continue; |
| 2396 | rt_entry(rtm, again); |
| 2397 | } |
| 2398 | free(buf); |
| 2399 | } |
| 2400 | |
| 2401 | void |
| 2402 | rt_entry(struct rt_msghdr *rtm, int again) |
| 2403 | { |
| 2404 | struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask; |
| 2405 | struct sockaddr_in6 *sin6_ifp; |
| 2406 | char *rtmp, *ifname = NULL((void *)0); |
| 2407 | struct riprt *rrt, *orrt; |
| 2408 | struct netinfo6 *np; |
| 2409 | int s; |
| 2410 | |
| 2411 | sin6_dst = sin6_gw = sin6_mask = sin6_ifp = 0; |
| 2412 | if ((rtm->rtm_flags & RTF_UP0x1) == 0 || rtm->rtm_flags & |
| 2413 | (RTF_CLONING0x100|RTF_LLINFO0x400|RTF_BLACKHOLE0x1000)) { |
| 2414 | return; /* not interested in the link route */ |
| 2415 | } |
| 2416 | /* do not look at cloned routes */ |
| 2417 | #ifdef RTF_WASCLONED |
| 2418 | if (rtm->rtm_flags & RTF_WASCLONED) |
| 2419 | return; |
| 2420 | #endif |
| 2421 | #ifdef RTF_CLONED0x10000 |
| 2422 | if (rtm->rtm_flags & RTF_CLONED0x10000) |
| 2423 | return; |
| 2424 | #endif |
| 2425 | /* |
| 2426 | * do not look at dynamic routes. |
| 2427 | * netbsd/openbsd cloned routes have UGHD. |
| 2428 | */ |
| 2429 | if (rtm->rtm_flags & RTF_DYNAMIC0x10) |
| 2430 | return; |
| 2431 | rtmp = (char *)((char *)rtm + rtm->rtm_hdrlen); |
| 2432 | /* Destination */ |
| 2433 | if ((rtm->rtm_addrs & RTA_DST0x1) == 0) |
| 2434 | return; /* ignore routes without destination address */ |
| 2435 | sin6_dst = (struct sockaddr_in6 *)rtmp; |
| 2436 | rtmp += ROUNDUP(sin6_dst->sin6_len)((sin6_dst->sin6_len) > 0 ? (1 + (((sin6_dst->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); |
| 2437 | if (rtm->rtm_addrs & RTA_GATEWAY0x2) { |
| 2438 | sin6_gw = (struct sockaddr_in6 *)rtmp; |
| 2439 | rtmp += ROUNDUP(sin6_gw->sin6_len)((sin6_gw->sin6_len) > 0 ? (1 + (((sin6_gw->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); |
| 2440 | } |
| 2441 | if (rtm->rtm_addrs & RTA_NETMASK0x4) { |
| 2442 | sin6_mask = (struct sockaddr_in6 *)rtmp; |
| 2443 | rtmp += ROUNDUP(sin6_mask->sin6_len)((sin6_mask->sin6_len) > 0 ? (1 + (((sin6_mask->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); |
| 2444 | } |
| 2445 | if (rtm->rtm_addrs & RTA_IFP0x10) { |
| 2446 | sin6_ifp = (struct sockaddr_in6 *)rtmp; |
| 2447 | rtmp += ROUNDUP(sin6_ifp->sin6_len)((sin6_ifp->sin6_len) > 0 ? (1 + (((sin6_ifp->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); |
Value stored to 'rtmp' is never read | |
| 2448 | } |
| 2449 | |
| 2450 | /* Destination */ |
| 2451 | if (sin6_dst->sin6_family != AF_INET624) |
| 2452 | return; |
| 2453 | if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr)(((&sin6_dst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&sin6_dst->sin6_addr)->__u6_addr .__u6_addr8[1] & 0xc0) == 0x80))) |
| 2454 | return; /* Link-local */ |
| 2455 | if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback)(memcmp(&(&sin6_dst->sin6_addr)->__u6_addr.__u6_addr8 [0], &(&in6addr_loopback)->__u6_addr.__u6_addr8[0] , sizeof(struct in6_addr)) == 0)) |
| 2456 | return; /* Loopback */ |
| 2457 | if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr)((&sin6_dst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff)) |
| 2458 | return; |
| 2459 | |
| 2460 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void *)0)) { |
| 2461 | fatal("calloc: struct riprt"); |
| 2462 | /*NOTREACHED*/ |
| 2463 | } |
| 2464 | np = &rrt->rrt_info; |
| 2465 | rrt->rrt_t = time(NULL((void *)0)); |
| 2466 | if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC0x800)) |
| 2467 | rrt->rrt_t = 0; /* Don't age static routes */ |
| 2468 | if ((rtm->rtm_flags & (RTF_HOST0x4|RTF_GATEWAY0x2)) == RTF_HOST0x4) |
| 2469 | rrt->rrt_t = 0; /* Don't age non-gateway host routes */ |
| 2470 | np->rip6_tag = 0; |
| 2471 | np->rip6_metric = 1; |
| 2472 | rrt->rrt_flags = rtm->rtm_flags; |
| 2473 | np->rip6_dest = sin6_dst->sin6_addr; |
| 2474 | |
| 2475 | /* Mask or plen */ |
| 2476 | if (rtm->rtm_flags & RTF_HOST0x4) |
| 2477 | np->rip6_plen = 128; /* Host route */ |
| 2478 | else if (sin6_mask) |
| 2479 | np->rip6_plen = sin6mask2len(sin6_mask); |
| 2480 | else |
| 2481 | np->rip6_plen = 0; |
| 2482 | |
| 2483 | orrt = rtsearch(np, NULL((void *)0)); |
| 2484 | if (orrt && orrt->rrt_info.rip6_metric != HOPCNT_INFINITY616) { |
| 2485 | /* Already found */ |
| 2486 | if (!again) { |
| 2487 | log_debug("route: %s/%d flags %s: already registered", |
| 2488 | inet6_n2p(&np->rip6_dest), np->rip6_plen, |
| 2489 | rtflags(rtm)); |
| 2490 | } |
| 2491 | free(rrt); |
| 2492 | return; |
| 2493 | } |
| 2494 | /* Gateway */ |
| 2495 | if (!sin6_gw) |
| 2496 | memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); |
| 2497 | else { |
| 2498 | if (sin6_gw->sin6_family == AF_INET624) |
| 2499 | rrt->rrt_gw = sin6_gw->sin6_addr; |
| 2500 | else if (sin6_gw->sin6_family == AF_LINK18) { |
| 2501 | /* XXX in case ppp link? */ |
| 2502 | rrt->rrt_gw = in6addr_loopback; |
| 2503 | } else |
| 2504 | memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); |
| 2505 | } |
| 2506 | log_enqueue("route: %s/%d flags %s", |
| 2507 | inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm)); |
| 2508 | log_enqueue(" gw %s", inet6_n2p(&rrt->rrt_gw)); |
| 2509 | |
| 2510 | /* Interface */ |
| 2511 | s = rtm->rtm_index; |
| 2512 | if (s < nindex2ifc && index2ifc[s]) |
| 2513 | ifname = index2ifc[s]->ifc_name; |
| 2514 | else { |
| 2515 | log_debug(" not configured"); |
| 2516 | free(rrt); |
| 2517 | return; |
| 2518 | } |
| 2519 | log_debug(" if %s sock %d", ifname, s); |
| 2520 | rrt->rrt_index = s; |
| 2521 | |
| 2522 | /* Check gateway */ |
| 2523 | if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw)(((&rrt->rrt_gw)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&rrt->rrt_gw)->__u6_addr.__u6_addr8[1] & 0xc0 ) == 0x80)) && |
| 2524 | !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == (__uint32_t)(__builtin_constant_p (1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t)(1) & 0xff000000 ) >> 24) : __swap32md(1))))) { |
| 2525 | log_warnx("***** Gateway %s is not a link-local address.", |
| 2526 | inet6_n2p(&rrt->rrt_gw)); |
| 2527 | log_warnx("***** dest(%s) if(%s) -- Not optimized.", |
| 2528 | inet6_n2p(&rrt->rrt_info.rip6_dest), ifname); |
| 2529 | rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR0x20000000; |
| 2530 | } |
| 2531 | |
| 2532 | /* Put it to the route list */ |
| 2533 | if (orrt && orrt->rrt_info.rip6_metric == HOPCNT_INFINITY616) { |
| 2534 | /* replace route list */ |
| 2535 | rrt->rrt_next = orrt->rrt_next; |
| 2536 | *orrt = *rrt; |
| 2537 | log_debug("route: %s/%d flags %s: replace new route", |
| 2538 | inet6_n2p(&np->rip6_dest), np->rip6_plen, |
| 2539 | rtflags(rtm)); |
| 2540 | free(rrt); |
| 2541 | } else { |
| 2542 | rrt->rrt_next = riprt; |
| 2543 | riprt = rrt; |
| 2544 | } |
| 2545 | } |
| 2546 | |
| 2547 | int |
| 2548 | addroute(struct riprt *rrt, const struct in6_addr *gw, struct ifc *ifcp) |
| 2549 | { |
| 2550 | struct netinfo6 *np; |
| 2551 | u_char buf[BUFSIZ1024], buf1[BUFSIZ1024], buf2[BUFSIZ1024]; |
| 2552 | struct rt_msghdr *rtm; |
| 2553 | struct sockaddr_in6 *sin6; |
| 2554 | int len; |
| 2555 | |
| 2556 | np = &rrt->rrt_info; |
| 2557 | inet_ntop(AF_INET624, (const void *)gw, (char *)buf1, sizeof(buf1)); |
| 2558 | inet_ntop(AF_INET624, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2)); |
| 2559 | if (uflag) |
| 2560 | log_info("RTADD: %s/%d gw %s [%d] ifa %s", |
| 2561 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, |
| 2562 | np->rip6_metric - 1, buf2); |
| 2563 | else |
| 2564 | log_debug("RTADD: %s/%d gw %s [%d] ifa %s", |
| 2565 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, |
| 2566 | np->rip6_metric - 1, buf2); |
| 2567 | |
| 2568 | if (nflag) |
| 2569 | return 0; |
| 2570 | |
| 2571 | memset(buf, 0, sizeof(buf)); |
| 2572 | rtm = (struct rt_msghdr *)buf; |
| 2573 | rtm->rtm_type = RTM_ADD0x1; |
| 2574 | rtm->rtm_version = RTM_VERSION5; |
| 2575 | rtm->rtm_seq = ++seq; |
| 2576 | rtm->rtm_flags = rrt->rrt_flags; |
| 2577 | rtm->rtm_addrs = RTA_DST0x1 | RTA_GATEWAY0x2 | RTA_NETMASK0x4; |
| 2578 | rtm->rtm_inits = RTV_HOPCOUNT0x2; |
| 2579 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; |
| 2580 | /* Destination */ |
| 2581 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 2582 | sin6->sin6_family = AF_INET624; |
| 2583 | sin6->sin6_addr = np->rip6_dest; |
| 2584 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); |
| 2585 | /* Gateway */ |
| 2586 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 2587 | sin6->sin6_family = AF_INET624; |
| 2588 | sin6->sin6_addr = *gw; |
| 2589 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); |
| 2590 | /* Netmask */ |
| 2591 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 2592 | sin6->sin6_family = AF_INET624; |
| 2593 | sin6->sin6_addr = *(plen2mask(np->rip6_plen)); |
| 2594 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); |
| 2595 | |
| 2596 | len = (char *)sin6 - (char *)buf; |
| 2597 | rtm->rtm_msglen = len; |
| 2598 | if (write(rtsock, buf, len) > 0) |
| 2599 | return 0; |
| 2600 | |
| 2601 | if (errno(*__errno()) == EEXIST17) { |
| 2602 | log_warnx("RTADD: Route already exists %s/%d gw %s", |
| 2603 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); |
| 2604 | } else { |
| 2605 | log_warnx("RTADD: Can not write to rtsock (addroute): %s", |
| 2606 | strerror(errno(*__errno()))); |
| 2607 | } |
| 2608 | return -1; |
| 2609 | } |
| 2610 | |
| 2611 | int |
| 2612 | delroute(struct netinfo6 *np, struct in6_addr *gw) |
| 2613 | { |
| 2614 | u_char buf[BUFSIZ1024], buf2[BUFSIZ1024]; |
| 2615 | struct rt_msghdr *rtm; |
| 2616 | struct sockaddr_in6 *sin6; |
| 2617 | int len; |
| 2618 | |
| 2619 | inet_ntop(AF_INET624, (void *)gw, (char *)buf2, sizeof(buf2)); |
| 2620 | if (uflag) |
| 2621 | log_info("RTDEL: %s/%d gw %s", inet6_n2p(&np->rip6_dest), |
| 2622 | np->rip6_plen, buf2); |
| 2623 | else |
| 2624 | log_debug("RTDEL: %s/%d gw %s", inet6_n2p(&np->rip6_dest), |
| 2625 | np->rip6_plen, buf2); |
| 2626 | |
| 2627 | if (nflag) |
| 2628 | return 0; |
| 2629 | |
| 2630 | memset(buf, 0, sizeof(buf)); |
| 2631 | rtm = (struct rt_msghdr *)buf; |
| 2632 | rtm->rtm_type = RTM_DELETE0x2; |
| 2633 | rtm->rtm_version = RTM_VERSION5; |
| 2634 | rtm->rtm_seq = ++seq; |
| 2635 | rtm->rtm_flags = RTF_UP0x1 | RTF_GATEWAY0x2; |
| 2636 | if (np->rip6_plen == sizeof(struct in6_addr) * 8) |
| 2637 | rtm->rtm_flags |= RTF_HOST0x4; |
| 2638 | rtm->rtm_addrs = RTA_DST0x1 | RTA_GATEWAY0x2 | RTA_NETMASK0x4; |
| 2639 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; |
| 2640 | /* Destination */ |
| 2641 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 2642 | sin6->sin6_family = AF_INET624; |
| 2643 | sin6->sin6_addr = np->rip6_dest; |
| 2644 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); |
| 2645 | /* Gateway */ |
| 2646 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 2647 | sin6->sin6_family = AF_INET624; |
| 2648 | sin6->sin6_addr = *gw; |
| 2649 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); |
| 2650 | /* Netmask */ |
| 2651 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 2652 | sin6->sin6_family = AF_INET624; |
| 2653 | sin6->sin6_addr = *(plen2mask(np->rip6_plen)); |
| 2654 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); |
| 2655 | |
| 2656 | len = (char *)sin6 - (char *)buf; |
| 2657 | rtm->rtm_msglen = len; |
| 2658 | if (write(rtsock, buf, len) >= 0) |
| 2659 | return 0; |
| 2660 | |
| 2661 | if (errno(*__errno()) == ESRCH3) { |
| 2662 | log_warnx("RTDEL: Route does not exist: %s/%d gw %s", |
| 2663 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); |
| 2664 | } else { |
| 2665 | log_warnx("RTDEL: Can not write to rtsock (delroute): %s", |
| 2666 | strerror(errno(*__errno()))); |
| 2667 | } |
| 2668 | return -1; |
| 2669 | } |
| 2670 | |
| 2671 | struct in6_addr * |
| 2672 | getroute(struct netinfo6 *np, struct in6_addr *gw) |
| 2673 | { |
| 2674 | u_char buf[BUFSIZ1024]; |
| 2675 | int len; |
| 2676 | struct rt_msghdr *rtm; |
| 2677 | struct sockaddr_in6 *sin6; |
| 2678 | |
| 2679 | rtm = (struct rt_msghdr *)buf; |
| 2680 | len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6); |
| 2681 | memset(rtm, 0, len); |
| 2682 | rtm->rtm_type = RTM_GET0x4; |
| 2683 | rtm->rtm_version = RTM_VERSION5; |
| 2684 | rtm->rtm_seq = ++seq; |
| 2685 | rtm->rtm_addrs = RTA_DST0x1; |
| 2686 | rtm->rtm_msglen = len; |
| 2687 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; |
| 2688 | sin6->sin6_len = sizeof(struct sockaddr_in6); |
| 2689 | sin6->sin6_family = AF_INET624; |
| 2690 | sin6->sin6_addr = np->rip6_dest; |
| 2691 | if (write(rtsock, buf, len) == -1) { |
| 2692 | if (errno(*__errno()) == ESRCH3) /* No such route found */ |
| 2693 | return NULL((void *)0); |
| 2694 | perror("write to rtsock"); |
| 2695 | exit(1); |
| 2696 | } |
| 2697 | do { |
| 2698 | if ((len = read(rtsock, buf, sizeof(buf))) == -1) { |
| 2699 | perror("read from rtsock"); |
| 2700 | exit(1); |
| 2701 | } |
| 2702 | rtm = (struct rt_msghdr *)buf; |
| 2703 | } while (rtm->rtm_version != RTM_VERSION5 || |
| 2704 | rtm->rtm_seq != seq || rtm->rtm_pid != pid); |
| 2705 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; |
| 2706 | if (rtm->rtm_addrs & RTA_DST0x1) { |
| 2707 | sin6 = (struct sockaddr_in6 *) |
| 2708 | ((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); |
| 2709 | } |
| 2710 | if (rtm->rtm_addrs & RTA_GATEWAY0x2) { |
| 2711 | *gw = sin6->sin6_addr; |
| 2712 | return gw; |
| 2713 | } |
| 2714 | return NULL((void *)0); |
| 2715 | } |
| 2716 | |
| 2717 | const char * |
| 2718 | inet6_n2p(const struct in6_addr *p) |
| 2719 | { |
| 2720 | static char buf[BUFSIZ1024]; |
| 2721 | |
| 2722 | return inet_ntop(AF_INET624, (const void *)p, buf, sizeof(buf)); |
| 2723 | } |
| 2724 | |
| 2725 | void |
| 2726 | ifrtdump(int sig) |
| 2727 | { |
| 2728 | |
| 2729 | ifdump(sig); |
| 2730 | rtdump(sig); |
| 2731 | } |
| 2732 | |
| 2733 | void |
| 2734 | ifdump(int sig) |
| 2735 | { |
| 2736 | struct ifc *ifcp; |
| 2737 | int i; |
| 2738 | |
| 2739 | log_info("%s: Interface Table Dump", hms()); |
| 2740 | log_info(" Number of interfaces: %d", nifc); |
| 2741 | for (i = 0; i < 2; i++) { |
| 2742 | log_info(" %sadvertising interfaces:", i ? "non-" : ""); |
| 2743 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { |
| 2744 | if (i == 0) { |
| 2745 | if ((ifcp->ifc_flags & IFF_UP0x1) == 0) |
| 2746 | continue; |
| 2747 | if (iff_find(ifcp, 'N') != NULL((void *)0)) |
| 2748 | continue; |
| 2749 | } else { |
| 2750 | if (ifcp->ifc_flags & IFF_UP0x1) |
| 2751 | continue; |
| 2752 | } |
| 2753 | ifdump0(ifcp); |
| 2754 | } |
| 2755 | } |
| 2756 | log_info(""); |
| 2757 | } |
| 2758 | |
| 2759 | void |
| 2760 | ifdump0(const struct ifc *ifcp) |
| 2761 | { |
| 2762 | struct ifac *ifa; |
| 2763 | struct iff *iffp; |
| 2764 | char buf[BUFSIZ1024]; |
| 2765 | const char *ft; |
| 2766 | int addr; |
| 2767 | |
| 2768 | log_info(" %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)", |
| 2769 | ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags), |
| 2770 | inet6_n2p(&ifcp->ifc_mylladdr), |
| 2771 | ifcp->ifc_mtu, ifcp->ifc_metric); |
| 2772 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { |
| 2773 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { |
| 2774 | inet_ntop(AF_INET624, (void *)&ifa->ifa_raddr, |
| 2775 | buf, sizeof(buf)); |
| 2776 | log_info("\t%s/%d -- %s", |
| 2777 | inet6_n2p(&ifa->ifa_addr), |
| 2778 | ifa->ifa_plen, buf); |
| 2779 | } else { |
| 2780 | log_info("\t%s/%d", |
| 2781 | inet6_n2p(&ifa->ifa_addr), |
| 2782 | ifa->ifa_plen); |
| 2783 | } |
| 2784 | } |
| 2785 | if (ifcp->ifc_filter) { |
| 2786 | log_enqueue("\tFilter:"); |
| 2787 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { |
| 2788 | addr = 0; |
| 2789 | switch (iffp->iff_type) { |
| 2790 | case 'A': |
| 2791 | ft = "Aggregate"; addr++; break; |
| 2792 | case 'N': |
| 2793 | ft = "No-use"; break; |
| 2794 | case 'O': |
| 2795 | ft = "Advertise-only"; addr++; break; |
| 2796 | case 'T': |
| 2797 | ft = "Default-only"; break; |
| 2798 | case 'L': |
| 2799 | ft = "Listen-only"; addr++; break; |
| 2800 | default: |
| 2801 | snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type); |
| 2802 | ft = buf; |
| 2803 | addr++; |
| 2804 | break; |
| 2805 | } |
| 2806 | log_enqueue(" %s", ft); |
| 2807 | if (addr) { |
| 2808 | log_enqueue("(%s/%d)", |
| 2809 | inet6_n2p(&iffp->iff_addr), iffp->iff_plen); |
| 2810 | } |
| 2811 | } |
| 2812 | log_info(""); |
| 2813 | } |
| 2814 | } |
| 2815 | |
| 2816 | void |
| 2817 | rtdump(int sig) |
| 2818 | { |
| 2819 | struct riprt *rrt; |
| 2820 | char buf[BUFSIZ1024]; |
| 2821 | time_t t, age; |
| 2822 | |
| 2823 | t = time(NULL((void *)0)); |
| 2824 | log_info("%s: Routing Table Dump", hms()); |
| 2825 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { |
| 2826 | if (rrt->rrt_t == 0) |
| 2827 | age = 0; |
| 2828 | else |
| 2829 | age = t - rrt->rrt_t; |
| 2830 | inet_ntop(AF_INET624, (void *)&rrt->rrt_info.rip6_dest, |
| 2831 | buf, sizeof(buf)); |
| 2832 | log_enqueue(" %s/%d if(%d:%s) gw(%s) [%d] age(%lld)", |
| 2833 | buf, rrt->rrt_info.rip6_plen, rrt->rrt_index, |
| 2834 | index2ifc[rrt->rrt_index]->ifc_name, |
| 2835 | inet6_n2p(&rrt->rrt_gw), |
| 2836 | rrt->rrt_info.rip6_metric, (long long)age); |
| 2837 | if (rrt->rrt_info.rip6_tag) { |
| 2838 | log_enqueue(" tag(0x%04x)", |
| 2839 | ntohs(rrt->rrt_info.rip6_tag)(__uint16_t)(__builtin_constant_p(rrt->rrt_info.rip6_tag) ? (__uint16_t)(((__uint16_t)(rrt->rrt_info.rip6_tag) & 0xffU ) << 8 | ((__uint16_t)(rrt->rrt_info.rip6_tag) & 0xff00U) >> 8) : __swap16md(rrt->rrt_info.rip6_tag) ) & 0xffff); |
| 2840 | } |
| 2841 | if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR0x20000000) |
| 2842 | log_enqueue(" NOT-LL"); |
| 2843 | if (rrt->rrt_rflags & RRTF_NOADVERTISE0x10000000) |
| 2844 | log_enqueue(" NO-ADV"); |
| 2845 | log_info(""); |
| 2846 | } |
| 2847 | } |
| 2848 | |
| 2849 | /* |
| 2850 | * Parse the -A (and -O) options and put corresponding filter object to the |
| 2851 | * specified interface structures. Each of the -A/O option has the following |
| 2852 | * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate) |
| 2853 | * -O 5f09:c400::/32,ef0,ef1 (only when match) |
| 2854 | */ |
| 2855 | void |
| 2856 | filterconfig(void) |
| 2857 | { |
| 2858 | int i; |
| 2859 | char *p, *ap, *iflp, *ifname, *ep; |
| 2860 | struct iff ftmp, *iff_obj; |
| 2861 | struct ifc *ifcp; |
| 2862 | struct riprt *rrt; |
| 2863 | #if 0 |
| 2864 | struct in6_addr gw; |
| 2865 | #endif |
| 2866 | u_long plen; |
| 2867 | |
| 2868 | for (i = 0; i < nfilter; i++) { |
| 2869 | ap = filter[i]; |
| 2870 | iflp = NULL((void *)0); |
| 2871 | ifcp = NULL((void *)0); |
| 2872 | if (filtertype[i] == 'N' || filtertype[i] == 'T') { |
| 2873 | iflp = ap; |
| 2874 | goto ifonly; |
| 2875 | } |
| 2876 | if ((p = strchr(ap, ',')) != NULL((void *)0)) { |
| 2877 | *p++ = '\0'; |
| 2878 | iflp = p; |
| 2879 | } |
| 2880 | if ((p = strchr(ap, '/')) == NULL((void *)0)) { |
| 2881 | log_warnx("no prefixlen specified for '%s'", ap); |
| 2882 | fatalx("exiting"); |
| 2883 | /*NOTREACHED*/ |
| 2884 | } |
| 2885 | *p++ = '\0'; |
| 2886 | if (inet_pton(AF_INET624, ap, &ftmp.iff_addr) != 1) { |
| 2887 | log_warnx("invalid prefix specified for '%s'", ap); |
| 2888 | fatalx("exiting"); |
| 2889 | /*NOTREACHED*/ |
| 2890 | } |
| 2891 | errno(*__errno()) = 0; |
| 2892 | ep = NULL((void *)0); |
| 2893 | plen = strtoul(p, &ep, 10); |
| 2894 | if (errno(*__errno()) || !*p || *ep || plen > sizeof(ftmp.iff_addr) * 8) { |
| 2895 | log_warnx("invalid prefix length specified for '%s'", ap); |
| 2896 | fatalx("exiting"); |
| 2897 | /*NOTREACHED*/ |
| 2898 | } |
| 2899 | ftmp.iff_plen = plen; |
| 2900 | ftmp.iff_next = NULL((void *)0); |
| 2901 | applyplen(&ftmp.iff_addr, ftmp.iff_plen); |
| 2902 | ifonly: |
| 2903 | ftmp.iff_type = filtertype[i]; |
| 2904 | if (iflp == NULL((void *)0) || *iflp == '\0') { |
| 2905 | log_warnx("no interface specified for '%s'", ap); |
| 2906 | fatal("exiting"); |
| 2907 | /*NOTREACHED*/ |
| 2908 | } |
| 2909 | /* parse the interface listing portion */ |
| 2910 | while (iflp) { |
| 2911 | ifname = iflp; |
| 2912 | if ((iflp = strchr(iflp, ',')) != NULL((void *)0)) |
| 2913 | *iflp++ = '\0'; |
| 2914 | ifcp = ifc_find(ifname); |
| 2915 | if (ifcp == NULL((void *)0)) { |
| 2916 | log_warnx("no interface %s exists", ifname); |
| 2917 | fatalx("exiting"); |
| 2918 | /*NOTREACHED*/ |
| 2919 | } |
| 2920 | iff_obj = malloc(sizeof(struct iff)); |
| 2921 | if (iff_obj == NULL((void *)0)) { |
| 2922 | fatal("malloc of iff_obj"); |
| 2923 | /*NOTREACHED*/ |
| 2924 | } |
| 2925 | memcpy((void *)iff_obj, (void *)&ftmp, |
| 2926 | sizeof(struct iff)); |
| 2927 | /* link it to the interface filter */ |
| 2928 | iff_obj->iff_next = ifcp->ifc_filter; |
| 2929 | ifcp->ifc_filter = iff_obj; |
| 2930 | } |
| 2931 | |
| 2932 | /* |
| 2933 | * -A: aggregate configuration. |
| 2934 | */ |
| 2935 | if (filtertype[i] != 'A') |
| 2936 | continue; |
| 2937 | /* put the aggregate to the kernel routing table */ |
| 2938 | rrt = calloc(1, sizeof(struct riprt)); |
| 2939 | if (rrt == NULL((void *)0)) { |
| 2940 | fatal("calloc: rrt"); |
| 2941 | /*NOTREACHED*/ |
| 2942 | } |
| 2943 | rrt->rrt_info.rip6_dest = ftmp.iff_addr; |
| 2944 | rrt->rrt_info.rip6_plen = ftmp.iff_plen; |
| 2945 | rrt->rrt_info.rip6_metric = 1; |
| 2946 | rrt->rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); |
| 2947 | rrt->rrt_gw = in6addr_loopback; |
| 2948 | rrt->rrt_flags = RTF_UP0x1 | RTF_REJECT0x8; |
| 2949 | rrt->rrt_rflags = RRTF_AGGREGATE0x08000000; |
| 2950 | rrt->rrt_t = 0; |
| 2951 | rrt->rrt_index = loopifcp->ifc_index; |
| 2952 | #if 0 |
| 2953 | if (getroute(&rrt->rrt_info, &gw)) { |
| 2954 | #if 0 |
| 2955 | /* |
| 2956 | * When the address has already been registered in the |
| 2957 | * kernel routing table, it should be removed |
| 2958 | */ |
| 2959 | delroute(&rrt->rrt_info, &gw); |
| 2960 | #else |
| 2961 | /* it is safer behavior */ |
| 2962 | errno(*__errno()) = EINVAL22; |
| 2963 | fatal("%s/%u already in routing table, " |
| 2964 | "cannot aggregate", |
| 2965 | inet6_n2p(&rrt->rrt_info.rip6_dest), |
| 2966 | rrt->rrt_info.rip6_plen); |
| 2967 | /*NOTREACHED*/ |
| 2968 | #endif |
| 2969 | } |
| 2970 | #endif |
| 2971 | /* Put the route to the list */ |
| 2972 | rrt->rrt_next = riprt; |
| 2973 | riprt = rrt; |
| 2974 | log_debug("Aggregate: %s/%d for %s", |
| 2975 | inet6_n2p(&ftmp.iff_addr), ftmp.iff_plen, |
| 2976 | ifcp->ifc_name); |
| 2977 | /* Add this route to the kernel */ |
| 2978 | if (nflag) /* do not modify kernel routing table */ |
| 2979 | continue; |
| 2980 | addroute(rrt, &in6addr_loopback, loopifcp); |
| 2981 | } |
| 2982 | } |
| 2983 | |
| 2984 | /***************** utility functions *****************/ |
| 2985 | |
| 2986 | /* |
| 2987 | * Returns a pointer to ifac whose address and prefix length matches |
| 2988 | * with the address and prefix length specified in the arguments. |
| 2989 | */ |
| 2990 | struct ifac * |
| 2991 | ifa_match(const struct ifc *ifcp, const struct in6_addr *ia, int plen) |
| 2992 | { |
| 2993 | struct ifac *ifa; |
| 2994 | |
| 2995 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { |
| 2996 | if (IN6_ARE_ADDR_EQUAL(&ifa->ifa_addr, ia)(memcmp(&(&ifa->ifa_addr)->__u6_addr.__u6_addr8 [0], &(ia)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0) && |
| 2997 | ifa->ifa_plen == plen) |
| 2998 | break; |
| 2999 | } |
| 3000 | return ifa; |
| 3001 | } |
| 3002 | |
| 3003 | /* |
| 3004 | * Return a pointer to riprt structure whose address and prefix length |
| 3005 | * matches with the address and prefix length found in the argument. |
| 3006 | * Note: This is not a rtalloc(). Therefore exact match is necessary. |
| 3007 | */ |
| 3008 | struct riprt * |
| 3009 | rtsearch(struct netinfo6 *np, struct riprt **prev_rrt) |
| 3010 | { |
| 3011 | struct riprt *rrt; |
| 3012 | |
| 3013 | if (prev_rrt) |
| 3014 | *prev_rrt = NULL((void *)0); |
| 3015 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { |
| 3016 | if (rrt->rrt_info.rip6_plen == np->rip6_plen && |
| 3017 | IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&np->rip6_dest)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) |
| 3018 | &np->rip6_dest)(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&np->rip6_dest)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0)) |
| 3019 | return rrt; |
| 3020 | if (prev_rrt) |
| 3021 | *prev_rrt = rrt; |
| 3022 | } |
| 3023 | if (prev_rrt) |
| 3024 | *prev_rrt = NULL((void *)0); |
| 3025 | return 0; |
| 3026 | } |
| 3027 | |
| 3028 | int |
| 3029 | sin6mask2len(const struct sockaddr_in6 *sin6) |
| 3030 | { |
| 3031 | |
| 3032 | return mask2len(&sin6->sin6_addr, |
| 3033 | sin6->sin6_len - offsetof(struct sockaddr_in6, sin6_addr)__builtin_offsetof(struct sockaddr_in6, sin6_addr)); |
| 3034 | } |
| 3035 | |
| 3036 | int |
| 3037 | mask2len(const struct in6_addr *addr, int lenlim) |
| 3038 | { |
| 3039 | int i = 0, j; |
| 3040 | const u_char *p = (const u_char *)addr; |
| 3041 | |
| 3042 | for (j = 0; j < lenlim; j++, p++) { |
| 3043 | if (*p != 0xff) |
| 3044 | break; |
| 3045 | i += 8; |
| 3046 | } |
| 3047 | if (j < lenlim) { |
| 3048 | switch (*p) { |
| 3049 | #define MASKLEN(m, l) case m: do { i += l; break; } while (0) |
| 3050 | MASKLEN(0xfe, 7); break; |
| 3051 | MASKLEN(0xfc, 6); break; |
| 3052 | MASKLEN(0xf8, 5); break; |
| 3053 | MASKLEN(0xf0, 4); break; |
| 3054 | MASKLEN(0xe0, 3); break; |
| 3055 | MASKLEN(0xc0, 2); break; |
| 3056 | MASKLEN(0x80, 1); break; |
| 3057 | #undef MASKLEN |
| 3058 | } |
| 3059 | } |
| 3060 | return i; |
| 3061 | } |
| 3062 | |
| 3063 | void |
| 3064 | applyplen(struct in6_addr *ia, int plen) |
| 3065 | { |
| 3066 | static const u_char plent[8] = { |
| 3067 | 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe |
| 3068 | }; |
| 3069 | u_char *p; |
| 3070 | int i; |
| 3071 | |
| 3072 | p = ia->s6_addr__u6_addr.__u6_addr8; |
| 3073 | for (i = 0; i < 16; i++) { |
| 3074 | if (plen <= 0) |
| 3075 | *p = 0; |
| 3076 | else if (plen < 8) |
| 3077 | *p &= plent[plen]; |
| 3078 | p++, plen -= 8; |
| 3079 | } |
| 3080 | } |
| 3081 | |
| 3082 | struct in6_addr * |
| 3083 | plen2mask(int n) |
| 3084 | { |
| 3085 | static const int pl2m[9] = { |
| 3086 | 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff |
| 3087 | }; |
| 3088 | static struct in6_addr ia; |
| 3089 | u_char *p; |
| 3090 | int i; |
| 3091 | |
| 3092 | memset(&ia, 0, sizeof(struct in6_addr)); |
| 3093 | p = (u_char *)&ia; |
| 3094 | for (i = 0; i < 16; i++, p++, n -= 8) { |
| 3095 | if (n >= 8) { |
| 3096 | *p = 0xff; |
| 3097 | continue; |
| 3098 | } |
| 3099 | *p = pl2m[n]; |
| 3100 | break; |
| 3101 | } |
| 3102 | return &ia; |
| 3103 | } |
| 3104 | |
| 3105 | char * |
| 3106 | xstrdup(const char *p) |
| 3107 | { |
| 3108 | char *q; |
| 3109 | |
| 3110 | q = strdup(p); |
| 3111 | if (q == NULL((void *)0)) { |
| 3112 | fatal("strdup"); |
| 3113 | /*NOTREACHED*/ |
| 3114 | } |
| 3115 | return q; |
| 3116 | } |
| 3117 | |
| 3118 | const char * |
| 3119 | hms(void) |
| 3120 | { |
| 3121 | static char buf[BUFSIZ1024]; |
| 3122 | time_t t; |
| 3123 | struct tm *tm; |
| 3124 | |
| 3125 | t = time(NULL((void *)0)); |
| 3126 | if ((tm = localtime(&t)) == 0) { |
| 3127 | fatal("localtime"); |
| 3128 | /*NOTREACHED*/ |
| 3129 | } |
| 3130 | snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, |
| 3131 | tm->tm_sec); |
| 3132 | return buf; |
| 3133 | } |
| 3134 | |
| 3135 | #define RIPRANDDEV1.0 1.0 /* 30 +- 15, max - min = 30 */ |
| 3136 | |
| 3137 | int |
| 3138 | ripinterval(int timer) |
| 3139 | { |
| 3140 | double r = arc4random(); |
| 3141 | int interval; |
| 3142 | |
| 3143 | interval = (int)(timer + timer * RIPRANDDEV1.0 * (r / UINT32_MAX0xffffffffU - 0.5)); |
| 3144 | nextalarm = time(NULL((void *)0)) + interval; |
| 3145 | return interval; |
| 3146 | } |
| 3147 | |
| 3148 | time_t |
| 3149 | ripsuptrig(void) |
| 3150 | { |
| 3151 | time_t t; |
| 3152 | |
| 3153 | double r = arc4random(); |
| 3154 | t = (int)(RIP_TRIG_INT6_MIN1 + |
| 3155 | (RIP_TRIG_INT6_MAX5 - RIP_TRIG_INT6_MIN1) * (r / UINT32_MAX0xffffffffU)); |
| 3156 | sup_trig_update = time(NULL((void *)0)) + t; |
| 3157 | return t; |
| 3158 | } |
| 3159 | |
| 3160 | unsigned int |
| 3161 | if_maxindex(void) |
| 3162 | { |
| 3163 | struct if_nameindex *p, *p0; |
| 3164 | unsigned int max = 0; |
| 3165 | |
| 3166 | p0 = if_nameindex(); |
| 3167 | for (p = p0; p && p->if_index && p->if_name; p++) { |
| 3168 | if (max < p->if_index) |
| 3169 | max = p->if_index; |
| 3170 | } |
| 3171 | if_freenameindex(p0); |
| 3172 | return max; |
| 3173 | } |
| 3174 | |
| 3175 | struct ifc * |
| 3176 | ifc_find(char *name) |
| 3177 | { |
| 3178 | struct ifc *ifcp; |
| 3179 | |
| 3180 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { |
| 3181 | if (strcmp(name, ifcp->ifc_name) == 0) |
| 3182 | return ifcp; |
| 3183 | } |
| 3184 | return (struct ifc *)NULL((void *)0); |
| 3185 | } |
| 3186 | |
| 3187 | struct iff * |
| 3188 | iff_find(struct ifc *ifcp, int type) |
| 3189 | { |
| 3190 | struct iff *iffp; |
| 3191 | |
| 3192 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { |
| 3193 | if (iffp->iff_type == type) |
| 3194 | return iffp; |
| 3195 | } |
| 3196 | return NULL((void *)0); |
| 3197 | } |
| 3198 | |
| 3199 | void |
| 3200 | setindex2ifc(int idx, struct ifc *ifcp) |
| 3201 | { |
| 3202 | int n; |
| 3203 | struct ifc **p; |
| 3204 | |
| 3205 | if (!index2ifc) { |
| 3206 | nindex2ifc = 5; /*initial guess*/ |
| 3207 | index2ifc = calloc(nindex2ifc, sizeof(*index2ifc)); |
| 3208 | if (index2ifc == NULL((void *)0)) { |
| 3209 | fatal("calloc"); |
| 3210 | /*NOTREACHED*/ |
| 3211 | } |
| 3212 | } |
| 3213 | n = nindex2ifc; |
| 3214 | while (nindex2ifc <= idx) |
| 3215 | nindex2ifc *= 2; |
| 3216 | if (n != nindex2ifc) { |
| 3217 | p = reallocarray(index2ifc, nindex2ifc, sizeof(*index2ifc)); |
| 3218 | if (p == NULL((void *)0)) { |
| 3219 | fatal("reallocarray"); |
| 3220 | /*NOTREACHED*/ |
| 3221 | } |
| 3222 | memset(p + n, 0, (nindex2ifc - n) * sizeof(*index2ifc)); |
| 3223 | index2ifc = p; |
| 3224 | } |
| 3225 | index2ifc[idx] = ifcp; |
| 3226 | } |