1 /* 2 * Copyright (c) 1983, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1983, 1989, 1991, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)route.c 8.6 (Berkeley) 4/28/95 31 * $FreeBSD: src/sbin/route/route.c,v 1.40.2.11 2003/02/27 23:10:10 ru Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/file.h> 36 #include <sys/socket.h> 37 #include <sys/ioctl.h> 38 #include <sys/sysctl.h> 39 #include <sys/types.h> 40 41 #include <net/if.h> 42 #include <net/route.h> 43 #include <net/if_dl.h> 44 #include <netinet/in.h> 45 #include <netinet/if_ether.h> 46 #include <arpa/inet.h> 47 #include <netdb.h> 48 49 #include <netproto/mpls/mpls.h> 50 51 #include <ctype.h> 52 #include <err.h> 53 #include <errno.h> 54 #include <paths.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <sysexits.h> 59 #include <unistd.h> 60 #include <ifaddrs.h> 61 62 #include "extern.h" 63 #include "keywords.h" 64 65 union sockunion { 66 struct sockaddr sa; 67 struct sockaddr_in sin; 68 #ifdef INET6 69 struct sockaddr_in6 sin6; 70 #endif 71 struct sockaddr_mpls smpls; 72 struct sockaddr_dl sdl; 73 struct sockaddr_inarp sinarp; 74 struct sockaddr_storage ss; /* added to avoid memory overrun */ 75 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, so_mpls1, 76 so_mpls2, so_mpls3; 77 78 typedef union sockunion *sup; 79 80 int nflag, wflag; 81 int cpuflag = -1; 82 83 static struct ortentry route; 84 static struct rt_metrics rt_metrics; 85 static int pid, rtm_addrs; 86 static int s; 87 static int forcehost, forcenet, af, qflag, tflag; 88 static int iflag, verbose, aflen = sizeof(struct sockaddr_in); 89 static int locking, lockrest, debugonly; 90 static int mplsop, popcount, pushcount, swapcount; 91 static u_long rtm_inits; 92 static uid_t uid; 93 94 static void flushroutes(int, char **); 95 static void set_metric(char *, int); 96 static void newroute(int, char **); 97 static void inet_makenetandmask(u_long, struct sockaddr_in *, u_long); 98 static void interfaces(void); 99 static void monitor(void); 100 static void sockaddr(const char *, struct sockaddr *); 101 static void sodump(sup, const char *); 102 static void bprintf(FILE *, int, u_char *); 103 static void print_getmsg(struct rt_msghdr *, int); 104 static void print_rtmsg(struct rt_msghdr *, int); 105 static void pmsg_common(struct rt_msghdr *); 106 static void pmsg_addrs(char *, int); 107 static void mask_addr(void); 108 static int getaddr(int, const char *, struct hostent **); 109 static int rtmsg(int, int); 110 static int prefixlen(const char *); 111 #ifdef INET6 112 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 113 #endif 114 115 void 116 usage(const char *cp) 117 { 118 if (cp != NULL) 119 warnx("bad keyword: %s", cp); 120 fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n"); 121 exit(EX_USAGE); 122 /* NOTREACHED */ 123 } 124 125 int 126 main(int argc, char **argv) 127 { 128 int ch; 129 130 if (argc < 2) 131 usage(NULL); 132 133 while ((ch = getopt(argc, argv, "c:wnqdtv")) != -1) 134 switch(ch) { 135 case 'c': 136 cpuflag = strtol(optarg, NULL, 0); 137 break; 138 case 'w': 139 wflag = 1; 140 break; 141 case 'n': 142 nflag = 1; 143 break; 144 case 'q': 145 qflag = 1; 146 break; 147 case 'v': 148 verbose = 1; 149 break; 150 case 't': 151 tflag = 1; 152 break; 153 case 'd': 154 debugonly = 1; 155 break; 156 case '?': 157 default: 158 usage(NULL); 159 } 160 argc -= optind; 161 argv += optind; 162 163 pid = getpid(); 164 uid = geteuid(); 165 if (tflag) 166 s = open(_PATH_DEVNULL, O_WRONLY, 0); 167 else 168 s = socket(PF_ROUTE, SOCK_RAW, 0); 169 if (s < 0) 170 err(EX_OSERR, "socket"); 171 if (*argv != NULL) 172 switch (keyword(*argv)) { 173 case K_GET: 174 uid = 0; 175 /* FALLTHROUGH */ 176 177 case K_CHANGE: 178 case K_ADD: 179 case K_DELETE: 180 newroute(argc, argv); 181 /* NOTREACHED */ 182 183 case K_SHOW: 184 show(argc, argv); 185 return(0); 186 187 case K_MONITOR: 188 monitor(); 189 /* NOTREACHED */ 190 191 case K_FLUSH: 192 flushroutes(argc, argv); 193 exit(0); 194 /* NOTREACHED */ 195 } 196 usage(*argv); 197 /* NOTREACHED */ 198 } 199 200 /* 201 * Purge all entries in the routing tables not 202 * associated with network interfaces. 203 */ 204 static void 205 flushroutes(int argc, char **argv) 206 { 207 size_t needed; 208 int mib[7], rlen, seqno; 209 int miblen; 210 char *buf, *next, *lim; 211 struct rt_msghdr *rtm; 212 213 if (uid != 0) { 214 errx(EX_NOPERM, "must be root to alter routing table"); 215 } 216 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 217 if (argc > 1) { 218 argv++; 219 if (argc == 2 && **argv == '-') 220 switch (keyword(*argv + 1)) { 221 case K_INET: 222 af = AF_INET; 223 break; 224 #ifdef INET6 225 case K_INET6: 226 af = AF_INET6; 227 break; 228 #endif 229 case K_LINK: 230 af = AF_LINK; 231 break; 232 case K_MPLS: 233 af = AF_MPLS; 234 break; 235 default: 236 goto bad; 237 } else 238 bad: usage(*argv); 239 } 240 mib[0] = CTL_NET; 241 mib[1] = PF_ROUTE; 242 mib[2] = 0; /* protocol */ 243 mib[3] = 0; /* wildcard address family */ 244 mib[4] = NET_RT_DUMP; 245 mib[5] = 0; /* no flags */ 246 if (cpuflag >= 0) { 247 mib[6] = cpuflag; 248 miblen = 7; 249 } else { 250 miblen = 6; 251 } 252 if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) 253 err(EX_OSERR, "route-sysctl-estimate"); 254 if ((buf = malloc(needed)) == NULL) 255 errx(EX_OSERR, "malloc failed"); 256 if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) 257 err(EX_OSERR, "route-sysctl-get"); 258 lim = buf + needed; 259 if (verbose) 260 printf("Examining routing table from sysctl\n"); 261 seqno = 0; /* ??? */ 262 for (next = buf; next < lim; next += rtm->rtm_msglen) { 263 rtm = (struct rt_msghdr *)next; 264 if (verbose) 265 print_rtmsg(rtm, rtm->rtm_msglen); 266 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 267 continue; 268 if (af != 0) { 269 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 270 271 if (sa->sa_family != af) 272 continue; 273 } 274 if (debugonly) 275 continue; 276 rtm->rtm_type = RTM_DELETE; 277 rtm->rtm_seq = seqno; 278 rlen = write(s, next, rtm->rtm_msglen); 279 if (rlen < (int)rtm->rtm_msglen) { 280 warn("write to routing socket"); 281 printf("got only %d for rlen\n", rlen); 282 break; 283 } 284 seqno++; 285 if (qflag) 286 continue; 287 if (verbose) { 288 print_rtmsg(rtm, rlen); 289 } else { 290 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 291 if (wflag) { 292 printf("%-20s ", rtm->rtm_flags & RTF_HOST ? 293 routename(sa) : netname(sa)); 294 } else { 295 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 296 routename(sa) : netname(sa)); 297 } 298 sa = (struct sockaddr *)(RT_ROUNDUP(sa->sa_len) + 299 (char *)sa); 300 if (wflag) { 301 printf("%-20s ", routename(sa)); 302 } else { 303 printf("%-20.20s ", routename(sa)); 304 } 305 printf("done\n"); 306 } 307 } 308 } 309 310 char * 311 routename(struct sockaddr *sa) 312 { 313 const char *cp; 314 static char line[MAXHOSTNAMELEN + 1]; 315 struct hostent *hp; 316 static char domain[MAXHOSTNAMELEN + 1]; 317 static int first = 1; 318 319 if (first) { 320 first = 0; 321 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 322 (cp = strchr(domain, '.'))) { 323 domain[MAXHOSTNAMELEN] = '\0'; 324 strcpy(domain, cp + 1); 325 } else 326 domain[0] = 0; 327 } 328 329 if (sa->sa_len == 0) 330 strcpy(line, "default"); 331 else switch (sa->sa_family) { 332 333 case AF_INET: 334 { struct in_addr in; 335 in = ((struct sockaddr_in *)sa)->sin_addr; 336 337 cp = NULL; 338 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 339 cp = "default"; 340 if (cp == NULL && !nflag) { 341 hp = gethostbyaddr(&in, sizeof(struct in_addr), 342 AF_INET); 343 if (hp != NULL) { 344 char *cptr; 345 cptr = strchr(hp->h_name, '.'); 346 if (cptr != NULL && !wflag && 347 strcmp(cptr + 1, domain) == 0) 348 *cptr = '\0'; 349 cp = hp->h_name; 350 } 351 } 352 if (cp != NULL) { 353 strncpy(line, cp, sizeof(line) - 1); 354 line[sizeof(line) - 1] = '\0'; 355 } else 356 sprintf(line, "%s", inet_ntoa(in)); 357 break; 358 } 359 360 #ifdef INET6 361 case AF_INET6: 362 { 363 struct sockaddr_in6 sin6; /* use static var for safety */ 364 int niflags = 0; 365 #ifdef NI_WITHSCOPEID 366 niflags = NI_WITHSCOPEID; 367 #endif 368 369 memset(&sin6, 0, sizeof(sin6)); 370 memcpy(&sin6, sa, sa->sa_len); 371 sin6.sin6_len = sizeof(struct sockaddr_in6); 372 sin6.sin6_family = AF_INET6; 373 #ifdef __KAME__ 374 if (sa->sa_len == sizeof(struct sockaddr_in6) && 375 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 376 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 377 sin6.sin6_scope_id == 0) { 378 sin6.sin6_scope_id = 379 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 380 sin6.sin6_addr.s6_addr[2] = 0; 381 sin6.sin6_addr.s6_addr[3] = 0; 382 } 383 #endif 384 if (nflag) 385 niflags |= NI_NUMERICHOST; 386 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 387 line, sizeof(line), NULL, 0, niflags) != 0) 388 strncpy(line, "invalid", sizeof(line)); 389 390 return(line); 391 } 392 #endif 393 394 case AF_LINK: 395 return(link_ntoa((struct sockaddr_dl *)sa)); 396 397 default: 398 { 399 /* 400 * Unknown address family; just render the raw 401 * data in sa->sa_data as hex values. 402 */ 403 uint8_t *sp = (uint8_t *)sa->sa_data; 404 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 405 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 406 char *cpe = line + sizeof(line); 407 408 while (sp < splim && cps < cpe) 409 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 410 break; 411 } 412 } 413 return(line); 414 } 415 416 /* 417 * Return the name of the network whose address is given. 418 * The address is assumed to be that of a net or subnet, not a host. 419 */ 420 char * 421 netname(struct sockaddr *sa) 422 { 423 const char *cp = NULL; 424 static char line[MAXHOSTNAMELEN + 1]; 425 struct netent *np = NULL; 426 u_long net, mask; 427 u_long i; 428 int subnetshift; 429 430 switch (sa->sa_family) { 431 432 case AF_INET: 433 { struct in_addr in; 434 in = ((struct sockaddr_in *)sa)->sin_addr; 435 436 i = in.s_addr = ntohl(in.s_addr); 437 if (in.s_addr == 0) 438 cp = "default"; 439 else if (!nflag) { 440 if (IN_CLASSA(i)) { 441 mask = IN_CLASSA_NET; 442 subnetshift = 8; 443 } else if (IN_CLASSB(i)) { 444 mask = IN_CLASSB_NET; 445 subnetshift = 8; 446 } else { 447 mask = IN_CLASSC_NET; 448 subnetshift = 4; 449 } 450 /* 451 * If there are more bits than the standard mask 452 * would suggest, subnets must be in use. 453 * Guess at the subnet mask, assuming reasonable 454 * width subnet fields. 455 */ 456 while (in.s_addr &~ mask) 457 mask |= mask >> subnetshift; 458 net = in.s_addr & mask; 459 while ((mask & 1) == 0) 460 mask >>= 1, net >>= 1; 461 np = getnetbyaddr(net, AF_INET); 462 if (np != NULL) 463 cp = np->n_name; 464 } 465 #define C(x) (unsigned)((x) & 0xff) 466 if (cp != NULL) 467 strncpy(line, cp, sizeof(line)); 468 else if ((in.s_addr & 0xffffff) == 0) 469 sprintf(line, "%u", C(in.s_addr >> 24)); 470 else if ((in.s_addr & 0xffff) == 0) 471 sprintf(line, "%u.%u", C(in.s_addr >> 24), 472 C(in.s_addr >> 16)); 473 else if ((in.s_addr & 0xff) == 0) 474 sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 475 C(in.s_addr >> 16), C(in.s_addr >> 8)); 476 else 477 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 478 C(in.s_addr >> 16), C(in.s_addr >> 8), 479 C(in.s_addr)); 480 #undef C 481 break; 482 } 483 484 #ifdef INET6 485 case AF_INET6: 486 { 487 struct sockaddr_in6 sin6; /* use static var for safety */ 488 int niflags = 0; 489 #ifdef NI_WITHSCOPEID 490 niflags = NI_WITHSCOPEID; 491 #endif 492 493 memset(&sin6, 0, sizeof(sin6)); 494 memcpy(&sin6, sa, sa->sa_len); 495 sin6.sin6_len = sizeof(struct sockaddr_in6); 496 sin6.sin6_family = AF_INET6; 497 #ifdef __KAME__ 498 if (sa->sa_len == sizeof(struct sockaddr_in6) && 499 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 500 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 501 sin6.sin6_scope_id == 0) { 502 sin6.sin6_scope_id = 503 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 504 sin6.sin6_addr.s6_addr[2] = 0; 505 sin6.sin6_addr.s6_addr[3] = 0; 506 } 507 #endif 508 if (nflag) 509 niflags |= NI_NUMERICHOST; 510 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 511 line, sizeof(line), NULL, 0, niflags) != 0) 512 strncpy(line, "invalid", sizeof(line)); 513 514 return(line); 515 } 516 #endif 517 518 case AF_LINK: 519 return(link_ntoa((struct sockaddr_dl *)sa)); 520 521 522 default: 523 { 524 /* 525 * Unknown address family; just render the raw 526 * data in sa->sa_data as hex values. 527 */ 528 uint8_t *sp = (uint8_t *)sa->sa_data; 529 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 530 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 531 char *cpe = line + sizeof(line); 532 533 while (sp < splim && cps < cpe) 534 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 535 break; 536 } 537 } 538 return(line); 539 } 540 541 static void 542 set_metric(char *value, int key) 543 { 544 int flag = 0; 545 u_long noval, *valp = &noval; 546 547 switch (key) { 548 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 549 caseof(K_MTU, RTV_MTU, rmx_mtu); 550 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 551 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 552 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 553 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 554 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 555 caseof(K_RTT, RTV_RTT, rmx_rtt); 556 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 557 caseof(K_MSL, RTV_MSL, rmx_msl); 558 caseof(K_IWMAX, RTV_IWMAXSEGS, rmx_iwmaxsegs); 559 caseof(K_IW, RTV_IWCAPSEGS, rmx_iwcapsegs); 560 } 561 rtm_inits |= flag; 562 if (lockrest || locking) 563 rt_metrics.rmx_locks |= flag; 564 if (locking) 565 locking = 0; 566 *valp = atoi(value); 567 } 568 569 static void 570 newroute(int argc, char **argv) 571 { 572 char *cmd; 573 const char *err_str, *dest = "", *gateway = ""; 574 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC; 575 int key; 576 struct hostent *hp = NULL; 577 578 if (uid != 0) { 579 errx(EX_NOPERM, "must be root to alter routing table"); 580 } 581 cmd = argv[0]; 582 if (*cmd != 'g') 583 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 584 while (--argc > 0) { 585 if (**(++argv)== '-') { 586 switch (key = keyword(1 + *argv)) { 587 case K_LINK: 588 af = AF_LINK; 589 aflen = sizeof(struct sockaddr_dl); 590 break; 591 case K_INET: 592 af = AF_INET; 593 aflen = sizeof(struct sockaddr_in); 594 break; 595 #ifdef INET6 596 case K_INET6: 597 af = AF_INET6; 598 aflen = sizeof(struct sockaddr_in6); 599 break; 600 #endif 601 case K_SA: 602 af = PF_ROUTE; 603 aflen = sizeof(union sockunion); 604 break; 605 case K_IFACE: 606 case K_INTERFACE: 607 iflag++; 608 break; 609 case K_NOSTATIC: 610 flags &= ~RTF_STATIC; 611 break; 612 case K_LLINFO: 613 flags |= RTF_LLINFO; 614 break; 615 case K_LOCK: 616 locking = 1; 617 break; 618 case K_LOCKREST: 619 lockrest = 1; 620 break; 621 case K_HOST: 622 forcehost++; 623 break; 624 case K_REJECT: 625 flags |= RTF_REJECT; 626 break; 627 case K_BLACKHOLE: 628 flags |= RTF_BLACKHOLE; 629 break; 630 case K_PROTO1: 631 flags |= RTF_PROTO1; 632 break; 633 case K_PROTO2: 634 flags |= RTF_PROTO2; 635 break; 636 case K_PROXY: 637 proxy = 1; 638 break; 639 case K_CLONING: 640 flags |= RTF_CLONING; 641 break; 642 case K_XRESOLVE: 643 flags |= RTF_XRESOLVE; 644 break; 645 case K_STATIC: 646 flags |= RTF_STATIC; 647 break; 648 case K_IFA: 649 if (--argc == 0) 650 usage(NULL); 651 getaddr(RTA_IFA, *++argv, 0); 652 break; 653 case K_IFP: 654 if (--argc == 0) 655 usage(NULL); 656 getaddr(RTA_IFP, *++argv, 0); 657 break; 658 case K_GENMASK: 659 if (--argc == 0) 660 usage(NULL); 661 getaddr(RTA_GENMASK, *++argv, 0); 662 break; 663 case K_GATEWAY: 664 if (--argc == 0) 665 usage(NULL); 666 getaddr(RTA_GATEWAY, *++argv, 0); 667 break; 668 case K_DST: 669 if (--argc == 0) 670 usage(NULL); 671 ishost = getaddr(RTA_DST, *++argv, &hp); 672 dest = *argv; 673 break; 674 case K_NETMASK: 675 if (--argc == 0) 676 usage(NULL); 677 getaddr(RTA_NETMASK, *++argv, 0); 678 /* FALLTHROUGH */ 679 case K_NET: 680 forcenet++; 681 break; 682 case K_PREFIXLEN: 683 if (--argc == 0) 684 usage(NULL); 685 if (prefixlen(*++argv) == -1) { 686 forcenet = 0; 687 ishost = 1; 688 } else { 689 forcenet = 1; 690 ishost = 0; 691 } 692 break; 693 case K_MPLS: 694 af = AF_MPLS; 695 aflen = sizeof(struct sockaddr_mpls); 696 break; 697 case K_POP: 698 flags |= RTF_MPLSOPS; 699 af = AF_MPLS; 700 mplsop = MPLSLOP_POP; 701 switch(++popcount){ 702 case 1: 703 getaddr(RTA_MPLS1, "", 0); 704 break; 705 case 2: 706 getaddr(RTA_MPLS2, "", 0); 707 break; 708 case 3: 709 getaddr(RTA_MPLS3, "", 0); 710 break; 711 } 712 break; 713 case K_PUSH: 714 case K_SWAP: 715 if (popcount > 0) { 716 warnx("Push or swap after pop. Ignoring."); 717 break; 718 } 719 if (key == K_PUSH) { 720 mplsop = MPLSLOP_PUSH; 721 ++pushcount; 722 } else { 723 if (pushcount > 0) { 724 warnx("Swap after push. Ignoring."); 725 break; 726 } 727 if (swapcount > 0) { 728 warnx("Too many swaps. Ignoring."); 729 break; 730 } 731 mplsop = MPLSLOP_SWAP; 732 ++swapcount; 733 } 734 flags |= RTF_MPLSOPS; 735 af = AF_MPLS; 736 aflen = sizeof(struct sockaddr_mpls); 737 if (--argc == 0) 738 usage(NULL); 739 switch(pushcount + swapcount){ 740 case 1: 741 getaddr(RTA_MPLS1, *++argv, 0); 742 break; 743 case 2: 744 getaddr(RTA_MPLS2, *++argv, 0); 745 break; 746 case 3: 747 getaddr(RTA_MPLS3, *++argv, 0); 748 break; 749 } 750 break; 751 case K_MTU: 752 case K_HOPCOUNT: 753 case K_EXPIRE: 754 case K_RECVPIPE: 755 case K_SENDPIPE: 756 case K_SSTHRESH: 757 case K_RTT: 758 case K_RTTVAR: 759 case K_MSL: 760 case K_IWMAX: 761 case K_IW: 762 if (--argc == 0) 763 usage(NULL); 764 set_metric(*++argv, key); 765 break; 766 default: 767 usage(1+*argv); 768 } 769 } else { 770 if ((rtm_addrs & RTA_DST) == 0) { 771 dest = *argv; 772 ishost = getaddr(RTA_DST, *argv, &hp); 773 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 774 gateway = *argv; 775 getaddr(RTA_GATEWAY, *argv, &hp); 776 } else { 777 getaddr(RTA_NETMASK, *argv, 0); 778 forcenet = 1; 779 } 780 } 781 } 782 if (forcehost) { 783 ishost = 1; 784 #ifdef INET6 785 if (af == AF_INET6) { 786 rtm_addrs &= ~RTA_NETMASK; 787 memset((void *)&so_mask, 0, sizeof(so_mask)); 788 } 789 #endif 790 } 791 if (forcenet) 792 ishost = 0; 793 flags |= RTF_UP; 794 if (ishost) 795 flags |= RTF_HOST; 796 if (iflag == 0) 797 flags |= RTF_GATEWAY; 798 if (proxy) { 799 so_dst.sinarp.sin_other = SIN_PROXY; 800 flags |= RTF_ANNOUNCE; 801 } 802 for (attempts = 1; ; attempts++) { 803 errno = 0; 804 if ((ret = rtmsg(*cmd, flags)) == 0) 805 break; 806 if (errno != ENETUNREACH && errno != ESRCH) 807 break; 808 if (af == AF_INET && *gateway != '\0' && 809 hp != NULL && hp->h_addr_list[1] != NULL) { 810 hp->h_addr_list++; 811 memmove(&so_gate.sin.sin_addr, 812 hp->h_addr_list[0], 813 MIN((size_t)hp->h_length, 814 sizeof(so_gate.sin.sin_addr))); 815 } else 816 break; 817 } 818 if (*cmd == 'g') 819 exit(0); 820 if (!qflag) { 821 oerrno = errno; 822 printf("%s %s %s", cmd, ishost? "host" : "net", dest); 823 if (*gateway != '\0') { 824 printf(": gateway %s", gateway); 825 if (attempts > 1 && ret == 0 && af == AF_INET) 826 printf(" (%s)", 827 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 828 } 829 if (ret == 0) { 830 printf("\n"); 831 } else { 832 switch (oerrno) { 833 case ESRCH: 834 err_str = "not in table"; 835 break; 836 case EBUSY: 837 err_str = "entry in use"; 838 break; 839 case ENOBUFS: 840 err_str = "routing table overflow"; 841 break; 842 case EDQUOT: /* handle recursion avoidance in 843 rt_setgate() */ 844 err_str = "gateway uses the same route"; 845 break; 846 default: 847 err_str = strerror(oerrno); 848 break; 849 } 850 printf(": %s\n", err_str); 851 } 852 } 853 exit(ret != 0); 854 } 855 856 static void 857 inet_makenetandmask(u_long net, struct sockaddr_in *in, u_long bits) 858 { 859 u_long addr, mask = 0; 860 char *cp; 861 862 rtm_addrs |= RTA_NETMASK; 863 /* 864 * XXX: This approach unable to handle 0.0.0.1/32 correctly 865 * as inet_network() converts 0.0.0.1 and 1 equally. 866 */ 867 if (net <= 0xff) 868 addr = net << IN_CLASSA_NSHIFT; 869 else if (net <= 0xffff) 870 addr = net << IN_CLASSB_NSHIFT; 871 else if (net <= 0xffffff) 872 addr = net << IN_CLASSC_NSHIFT; 873 else 874 addr = net; 875 876 if (bits != 0) 877 mask = 0xffffffff << (32 - bits); 878 else if (net == 0) 879 mask = 0; 880 else if (IN_CLASSA(addr)) 881 mask = IN_CLASSA_NET; 882 else if (IN_CLASSB(addr)) 883 mask = IN_CLASSB_NET; 884 else if (IN_CLASSC(addr)) 885 mask = IN_CLASSC_NET; 886 else if (IN_MULTICAST(addr)) 887 mask = IN_CLASSD_NET; 888 else 889 mask = 0xffffffff; 890 891 in->sin_addr.s_addr = htonl(addr); 892 in = &so_mask.sin; 893 in->sin_addr.s_addr = htonl(mask); 894 in->sin_len = 0; 895 in->sin_family = 0; 896 cp = (char *)(&in->sin_addr + 1); 897 while (*--cp == 0 && cp > (char *)in) 898 ; 899 in->sin_len = 1 + cp - (char *)in; 900 } 901 902 #ifdef INET6 903 /* 904 * XXX the function may need more improvement... 905 */ 906 static int 907 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 908 { 909 struct in6_addr in6; 910 911 if (plen == NULL) { 912 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 913 sin6->sin6_scope_id == 0) { 914 plen = "0"; 915 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 916 /* aggregatable global unicast - RFC2374 */ 917 memset(&in6, 0, sizeof(in6)); 918 if (memcmp(&sin6->sin6_addr.s6_addr[8], 919 &in6.s6_addr[8], 8) == 0) 920 plen = "64"; 921 } 922 } 923 924 if (plen == NULL || strcmp(plen, "128") == 0) 925 return(1); 926 rtm_addrs |= RTA_NETMASK; 927 prefixlen(plen); 928 return(0); 929 } 930 #endif 931 932 /* 933 * Interpret an argument as a network address of some kind, 934 * returning 1 if a host address, 0 if a network address. 935 */ 936 static int 937 getaddr(int which, const char *str, struct hostent **hpp) 938 { 939 sup su; 940 struct hostent *hp; 941 struct netent *np; 942 u_long val; 943 char *q; 944 int afamily; /* local copy of af so we can change it */ 945 946 if (af == 0) { 947 af = AF_INET; 948 aflen = sizeof(struct sockaddr_in); 949 } 950 afamily = af; 951 rtm_addrs |= which; 952 switch (which) { 953 case RTA_DST: 954 su = &so_dst; 955 break; 956 case RTA_GATEWAY: 957 su = &so_gate; 958 if (iflag) { 959 struct ifaddrs *ifap, *ifa; 960 struct sockaddr_dl *sdl = NULL; 961 962 if (getifaddrs(&ifap)) 963 err(1, "getifaddrs"); 964 965 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 966 if (ifa->ifa_addr->sa_family != AF_LINK) 967 continue; 968 969 if (strcmp(str, ifa->ifa_name) != 0) 970 continue; 971 972 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 973 } 974 /* If we found it, then use it */ 975 if (sdl != NULL) { 976 /* 977 * Copy is safe since we have a 978 * sockaddr_storage member in sockunion{}. 979 * Note that we need to copy before calling 980 * freeifaddrs(). 981 * 982 * Interface routes are routed only by their 983 * sdl_index or interface name (we provide 984 * both here), not by the ARP address of the 985 * local interface (alen, slen = 0). 986 */ 987 memcpy(&su->sdl, sdl, sdl->sdl_len); 988 su->sdl.sdl_alen = 0; 989 su->sdl.sdl_slen = 0; 990 } 991 freeifaddrs(ifap); 992 if (sdl != NULL) 993 return(1); 994 } 995 break; 996 case RTA_NETMASK: 997 su = &so_mask; 998 break; 999 case RTA_GENMASK: 1000 su = &so_genmask; 1001 break; 1002 case RTA_IFP: 1003 su = &so_ifp; 1004 afamily = AF_LINK; 1005 break; 1006 case RTA_IFA: 1007 su = &so_ifa; 1008 break; 1009 case RTA_MPLS1: 1010 su = &so_mpls1; 1011 break; 1012 case RTA_MPLS2: 1013 su = &so_mpls2; 1014 break; 1015 case RTA_MPLS3: 1016 su = &so_mpls3; 1017 break; 1018 default: 1019 usage("internal error"); 1020 /*NOTREACHED*/ 1021 } 1022 su->sa.sa_len = aflen; 1023 su->sa.sa_family = afamily; /* cases that don't want it have left 1024 already */ 1025 if (strcmp(str, "default") == 0) { 1026 /* 1027 * Default is net 0.0.0.0/0 1028 */ 1029 switch (which) { 1030 case RTA_DST: 1031 forcenet++; 1032 /* bzero(su, sizeof(*su)); *//* for readability */ 1033 getaddr(RTA_NETMASK, str, 0); 1034 break; 1035 case RTA_NETMASK: 1036 case RTA_GENMASK: 1037 /* bzero(su, sizeof(*su)); *//* for readability */ 1038 break; 1039 } 1040 return(0); 1041 } 1042 switch (afamily) { 1043 #ifdef INET6 1044 case AF_INET6: 1045 { 1046 struct addrinfo hints, *res; 1047 1048 q = NULL; 1049 if (which == RTA_DST && (q = strchr(str, '/')) != NULL) 1050 *q = '\0'; 1051 memset(&hints, 0, sizeof(hints)); 1052 hints.ai_family = afamily; /*AF_INET6*/ 1053 hints.ai_flags = AI_NUMERICHOST; 1054 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1055 if (getaddrinfo(str, "0", &hints, &res) != 0 || 1056 res->ai_family != AF_INET6 || 1057 res->ai_addrlen != sizeof(su->sin6)) { 1058 fprintf(stderr, "%s: bad value\n", str); 1059 exit(1); 1060 } 1061 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1062 #ifdef __KAME__ 1063 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1064 IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) && 1065 su->sin6.sin6_scope_id) { 1066 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1067 htons(su->sin6.sin6_scope_id); 1068 su->sin6.sin6_scope_id = 0; 1069 } 1070 #endif 1071 freeaddrinfo(res); 1072 if (q != NULL) 1073 *q++ = '/'; 1074 if (which == RTA_DST) 1075 return(inet6_makenetandmask(&su->sin6, q)); 1076 return(0); 1077 } 1078 #endif /* INET6 */ 1079 1080 case AF_LINK: 1081 link_addr(str, &su->sdl); 1082 return(1); 1083 1084 case PF_ROUTE: 1085 su->sa.sa_len = sizeof(*su); 1086 sockaddr(str, &su->sa); 1087 return(1); 1088 1089 case AF_MPLS: 1090 { 1091 mpls_label_t label; 1092 1093 bzero(su, sizeof(*su)); 1094 su->sa.sa_len = sizeof(*su); 1095 su->sa.sa_family = AF_MPLS; 1096 su->smpls.smpls_op = mplsop; 1097 if (mplsop != MPLSLOP_POP && mplsop != MPLSLOP_POPALL && 1098 *str != '\0') { 1099 if (sscanf(str, "%u", &label) != 1) 1100 errx(EX_NOHOST, "bad address: %s", str); 1101 su->smpls.smpls_label = htonl(label); 1102 } 1103 return(1); 1104 } 1105 1106 case AF_INET: 1107 default: 1108 break; 1109 } 1110 1111 if (hpp == NULL) 1112 hpp = &hp; 1113 *hpp = NULL; 1114 1115 q = strchr(str,'/'); 1116 if (q != NULL && which == RTA_DST) { 1117 *q = '\0'; 1118 if ((val = inet_network(str)) != INADDR_NONE) { 1119 inet_makenetandmask( 1120 val, &su->sin, strtoul(q+1, 0, 0)); 1121 return(0); 1122 } 1123 *q = '/'; 1124 } 1125 if ((which != RTA_DST || forcenet == 0) && 1126 inet_aton(str, &su->sin.sin_addr)) { 1127 val = su->sin.sin_addr.s_addr; 1128 if (which != RTA_DST || 1129 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1130 return(1); 1131 else { 1132 val = ntohl(val); 1133 goto netdone; 1134 } 1135 } 1136 if (which == RTA_DST && forcehost == 0 && 1137 ((val = inet_network(str)) != INADDR_NONE || 1138 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1139 netdone: 1140 inet_makenetandmask(val, &su->sin, 0); 1141 return(0); 1142 } 1143 hp = gethostbyname(str); 1144 if (hp != NULL) { 1145 *hpp = hp; 1146 su->sin.sin_family = hp->h_addrtype; 1147 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1148 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr))); 1149 return(1); 1150 } 1151 errx(EX_NOHOST, "bad address: %s", str); 1152 } 1153 1154 static int 1155 prefixlen(const char *len_str) 1156 { 1157 int len = atoi(len_str), q, r; 1158 int max; 1159 char *p; 1160 1161 rtm_addrs |= RTA_NETMASK; 1162 switch (af) { 1163 #ifdef INET6 1164 case AF_INET6: 1165 max = 128; 1166 p = (char *)&so_mask.sin6.sin6_addr; 1167 break; 1168 #endif 1169 case AF_INET: 1170 max = 32; 1171 p = (char *)&so_mask.sin.sin_addr; 1172 break; 1173 default: 1174 fprintf(stderr, "prefixlen not supported in this af\n"); 1175 exit(1); 1176 /*NOTREACHED*/ 1177 } 1178 1179 if (len < 0 || max < len) { 1180 fprintf(stderr, "%s: bad value\n", len_str); 1181 exit(1); 1182 } 1183 1184 q = len >> 3; 1185 r = len & 7; 1186 so_mask.sa.sa_family = af; 1187 so_mask.sa.sa_len = aflen; 1188 memset((void *)p, 0, max / 8); 1189 if (q > 0) 1190 memset((void *)p, 0xff, q); 1191 if (r > 0) 1192 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1193 if (len == max) 1194 return(-1); 1195 else 1196 return(len); 1197 } 1198 1199 static void 1200 interfaces(void) 1201 { 1202 size_t needed; 1203 int mib[6]; 1204 char *buf, *lim, *next; 1205 struct rt_msghdr *rtm; 1206 1207 mib[0] = CTL_NET; 1208 mib[1] = PF_ROUTE; 1209 mib[2] = 0; /* protocol */ 1210 mib[3] = 0; /* wildcard address family */ 1211 mib[4] = NET_RT_IFLIST; 1212 mib[5] = 0; /* no flags */ 1213 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1214 err(EX_OSERR, "route-sysctl-estimate"); 1215 if ((buf = malloc(needed)) == NULL) 1216 errx(EX_OSERR, "malloc failed"); 1217 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1218 err(EX_OSERR, "actual retrieval of interface table"); 1219 lim = buf + needed; 1220 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1221 rtm = (struct rt_msghdr *)next; 1222 print_rtmsg(rtm, rtm->rtm_msglen); 1223 } 1224 } 1225 1226 static void 1227 monitor(void) 1228 { 1229 int n; 1230 char msg[2048]; 1231 1232 verbose = 1; 1233 if (debugonly) { 1234 interfaces(); 1235 exit(0); 1236 } 1237 for (;;) { 1238 time_t now; 1239 n = read(s, msg, 2048); 1240 now = time(NULL); 1241 printf("\ngot message of size %d on %s", n, ctime(&now)); 1242 print_rtmsg((struct rt_msghdr *)msg, n); 1243 } 1244 } 1245 1246 struct { 1247 struct rt_msghdr m_rtm; 1248 char m_space[512]; 1249 } m_rtmsg; 1250 1251 static int 1252 rtmsg(int cmd, int flags) 1253 { 1254 static int seq; 1255 int rlen; 1256 char *cp = m_rtmsg.m_space; 1257 int l; 1258 1259 #define NEXTADDR(w, u) \ 1260 if (rtm_addrs & (w)) {\ 1261 l = RT_ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1262 if (verbose) sodump(&(u),"u");\ 1263 } 1264 1265 errno = 0; 1266 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1267 if (cmd == 'a') 1268 cmd = RTM_ADD; 1269 else if (cmd == 'c') 1270 cmd = RTM_CHANGE; 1271 else if (cmd == 'g') { 1272 cmd = RTM_GET; 1273 if (so_ifp.sa.sa_family == 0) { 1274 so_ifp.sa.sa_family = AF_LINK; 1275 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1276 rtm_addrs |= RTA_IFP; 1277 } 1278 } else 1279 cmd = RTM_DELETE; 1280 #define rtm m_rtmsg.m_rtm 1281 rtm.rtm_type = cmd; 1282 rtm.rtm_flags = flags; 1283 rtm.rtm_version = RTM_VERSION; 1284 rtm.rtm_seq = ++seq; 1285 rtm.rtm_addrs = rtm_addrs; 1286 rtm.rtm_rmx = rt_metrics; 1287 rtm.rtm_inits = rtm_inits; 1288 1289 if (rtm_addrs & RTA_NETMASK) 1290 mask_addr(); 1291 NEXTADDR(RTA_DST, so_dst); 1292 NEXTADDR(RTA_GATEWAY, so_gate); 1293 NEXTADDR(RTA_NETMASK, so_mask); 1294 NEXTADDR(RTA_GENMASK, so_genmask); 1295 NEXTADDR(RTA_IFP, so_ifp); 1296 NEXTADDR(RTA_IFA, so_ifa); 1297 NEXTADDR(RTA_MPLS1, so_mpls1); 1298 NEXTADDR(RTA_MPLS2, so_mpls2); 1299 NEXTADDR(RTA_MPLS3, so_mpls3); 1300 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1301 if (verbose) 1302 print_rtmsg(&rtm, l); 1303 if (debugonly) 1304 return(0); 1305 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1306 warn("writing to routing socket"); 1307 return(-1); 1308 } 1309 if (cmd == RTM_GET) { 1310 do { 1311 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1312 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1313 if (l < 0) 1314 warn("read from routing socket"); 1315 else 1316 print_getmsg(&rtm, l); 1317 } 1318 #undef rtm 1319 return(0); 1320 } 1321 1322 static void 1323 mask_addr(void) 1324 { 1325 int olen = so_mask.sa.sa_len; 1326 char *cp1 = olen + (char *)&so_mask, *cp2; 1327 1328 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1329 if (*--cp1 != 0) { 1330 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1331 break; 1332 } 1333 if ((rtm_addrs & RTA_DST) == 0) 1334 return; 1335 switch (so_dst.sa.sa_family) { 1336 case AF_INET: 1337 #ifdef INET6 1338 case AF_INET6: 1339 #endif 1340 case 0: 1341 return; 1342 } 1343 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1344 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1345 while (cp2 > cp1) 1346 *--cp2 = 0; 1347 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1348 while (cp1 > so_dst.sa.sa_data) 1349 *--cp1 &= *--cp2; 1350 } 1351 1352 const char *msgtypes[] = { 1353 "", 1354 "RTM_ADD: Add Route", 1355 "RTM_DELETE: Delete Route", 1356 "RTM_CHANGE: Change Metrics or flags", 1357 "RTM_GET: Report Metrics", 1358 "RTM_LOSING: Kernel Suspects Partitioning", 1359 "RTM_REDIRECT: Told to use different route", 1360 "RTM_MISS: Lookup failed on this address", 1361 "RTM_LOCK: fix specified metrics", 1362 "RTM_OLDADD: caused by SIOCADDRT", 1363 "RTM_OLDDEL: caused by SIOCDELRT", 1364 "RTM_RESOLVE: Route created by cloning", 1365 "RTM_NEWADDR: address being added to iface", 1366 "RTM_DELADDR: address being removed from iface", 1367 "RTM_IFINFO: iface status change", 1368 "RTM_NEWMADDR: new multicast group membership on iface", 1369 "RTM_DELMADDR: multicast group membership removed from iface", 1370 "RTM_IFANNOUNCE: interface arrival/departure", 1371 0, 1372 }; 1373 1374 char metricnames[] = 1375 "\013iw\012iwmax\011msl\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1376 "\2hopcount\1mtu"; 1377 char routeflags[] = 1378 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT" 1379 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016" 1380 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE" 1381 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST"; 1382 char ifnetflags[] = 1383 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1384 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1385 "\017LINK2\020MULTICAST"; 1386 char addrnames[] = 1387 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD" 1388 "\011MPLS1\012MPLS2\013MPLS3"; 1389 1390 static void 1391 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused) 1392 { 1393 struct if_msghdr *ifm; 1394 struct ifa_msghdr *ifam; 1395 #ifdef RTM_NEWMADDR 1396 struct ifma_msghdr *ifmam; 1397 #endif 1398 struct if_announcemsghdr *ifan; 1399 1400 if (verbose == 0) 1401 return; 1402 if (rtm->rtm_version != RTM_VERSION) { 1403 printf("routing message version %d not understood\n", 1404 rtm->rtm_version); 1405 return; 1406 } 1407 if (msgtypes[rtm->rtm_type] != NULL) 1408 printf("%s: ", msgtypes[rtm->rtm_type]); 1409 else 1410 printf("#%d: ", rtm->rtm_type); 1411 printf("len %d, ", rtm->rtm_msglen); 1412 switch (rtm->rtm_type) { 1413 case RTM_IFINFO: 1414 ifm = (struct if_msghdr *)rtm; 1415 printf("if# %d, flags:", ifm->ifm_index); 1416 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1417 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1418 break; 1419 case RTM_NEWADDR: 1420 case RTM_DELADDR: 1421 ifam = (struct ifa_msghdr *)rtm; 1422 printf("metric %d, flags:", ifam->ifam_metric); 1423 bprintf(stdout, ifam->ifam_flags, routeflags); 1424 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1425 break; 1426 #ifdef RTM_NEWMADDR 1427 case RTM_NEWMADDR: 1428 case RTM_DELMADDR: 1429 ifmam = (struct ifma_msghdr *)rtm; 1430 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1431 break; 1432 #endif 1433 case RTM_IFANNOUNCE: 1434 ifan = (struct if_announcemsghdr *)rtm; 1435 printf("if# %d, what: ", ifan->ifan_index); 1436 switch (ifan->ifan_what) { 1437 case IFAN_ARRIVAL: 1438 printf("arrival"); 1439 break; 1440 case IFAN_DEPARTURE: 1441 printf("departure"); 1442 break; 1443 default: 1444 printf("#%d", ifan->ifan_what); 1445 break; 1446 } 1447 printf("\n"); 1448 break; 1449 1450 default: 1451 printf("pid: %ld, seq %d, errno %d, flags:", 1452 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1453 bprintf(stdout, rtm->rtm_flags, routeflags); 1454 pmsg_common(rtm); 1455 } 1456 } 1457 1458 static void 1459 print_getmsg(struct rt_msghdr *rtm, int msglen) 1460 { 1461 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1462 struct sockaddr_dl *ifp = NULL; 1463 struct sockaddr *sa; 1464 char *cp; 1465 int i; 1466 1467 printf(" route to: %s\n", routename(&so_dst.sa)); 1468 if (rtm->rtm_version != RTM_VERSION) { 1469 warnx("routing message version %d not understood", 1470 rtm->rtm_version); 1471 return; 1472 } 1473 if (rtm->rtm_msglen > msglen) { 1474 warnx("message length mismatch, in packet %d, returned %d", 1475 rtm->rtm_msglen, msglen); 1476 } 1477 if (rtm->rtm_errno != 0) { 1478 errno = rtm->rtm_errno; 1479 warn("message indicates error %d", errno); 1480 return; 1481 } 1482 cp = ((char *)(rtm + 1)); 1483 if (rtm->rtm_addrs) 1484 for (i = 1; i != 0; i <<= 1) 1485 if (i & rtm->rtm_addrs) { 1486 sa = (struct sockaddr *)cp; 1487 switch (i) { 1488 case RTA_DST: 1489 dst = sa; 1490 break; 1491 case RTA_GATEWAY: 1492 gate = sa; 1493 break; 1494 case RTA_NETMASK: 1495 mask = sa; 1496 break; 1497 case RTA_IFP: 1498 if (sa->sa_family == AF_LINK && 1499 ((struct sockaddr_dl *)sa)->sdl_nlen) 1500 ifp = (struct sockaddr_dl *)sa; 1501 break; 1502 } 1503 RT_ADVANCE(cp, sa); 1504 } 1505 if (dst != NULL && mask != NULL) 1506 mask->sa_family = dst->sa_family; /* XXX */ 1507 if (dst != NULL) 1508 printf("destination: %s\n", routename(dst)); 1509 if (mask != NULL) { 1510 int savenflag = nflag; 1511 1512 nflag = 1; 1513 printf(" mask: %s\n", routename(mask)); 1514 nflag = savenflag; 1515 } 1516 if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY) 1517 printf(" gateway: %s\n", routename(gate)); 1518 if (ifp != NULL) 1519 printf(" interface: %.*s\n", 1520 ifp->sdl_nlen, ifp->sdl_data); 1521 printf(" flags: "); 1522 bprintf(stdout, rtm->rtm_flags, routeflags); 1523 1524 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1525 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1526 1527 printf("\n%s\n", "\ 1528 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire msl,msec iwmax iw"); 1529 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1530 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1531 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1532 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1533 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1534 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1535 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1536 if (rtm->rtm_rmx.rmx_expire != 0) { 1537 struct timespec sp; 1538 clock_gettime(CLOCK_MONOTONIC, &sp); 1539 rtm->rtm_rmx.rmx_expire -= sp.tv_sec; 1540 } 1541 printf("%8ld%c ", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1542 printf("%8ld ", rtm->rtm_rmx.rmx_msl); 1543 printf("%5ld ", rtm->rtm_rmx.rmx_iwmaxsegs); 1544 printf("%3ld\n", rtm->rtm_rmx.rmx_iwcapsegs); 1545 #undef lock 1546 #undef msec 1547 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1548 if (verbose) 1549 pmsg_common(rtm); 1550 else if (rtm->rtm_addrs &~ RTA_IGN) { 1551 printf("sockaddrs: "); 1552 bprintf(stdout, rtm->rtm_addrs, addrnames); 1553 putchar('\n'); 1554 } 1555 #undef RTA_IGN 1556 } 1557 1558 static void 1559 pmsg_common(struct rt_msghdr *rtm) 1560 { 1561 printf("\nlocks: "); 1562 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1563 printf(" inits: "); 1564 bprintf(stdout, rtm->rtm_inits, metricnames); 1565 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1566 } 1567 1568 static void 1569 pmsg_addrs(char *cp, int addrs) 1570 { 1571 struct sockaddr *sa; 1572 int i; 1573 1574 if (addrs == 0) { 1575 putchar('\n'); 1576 return; 1577 } 1578 printf("\nsockaddrs: "); 1579 bprintf(stdout, addrs, addrnames); 1580 putchar('\n'); 1581 for (i = 1; i != 0; i <<= 1) 1582 if (i & addrs) { 1583 sa = (struct sockaddr *)cp; 1584 printf(" %s", routename(sa)); 1585 RT_ADVANCE(cp, sa); 1586 } 1587 putchar('\n'); 1588 fflush(stdout); 1589 } 1590 1591 static void 1592 bprintf(FILE *fp, int b, u_char *str) 1593 { 1594 int i; 1595 int gotsome = 0; 1596 1597 if (b == 0) 1598 return; 1599 while ((i = *str++) != 0) { 1600 if (b & (1 << (i-1))) { 1601 if (!gotsome) 1602 i = '<'; 1603 else 1604 i = ','; 1605 putc(i, fp); 1606 gotsome = 1; 1607 for (; (i = *str) > 32; str++) 1608 putc(i, fp); 1609 } else 1610 while (*str > 32) 1611 str++; 1612 } 1613 if (gotsome) 1614 putc('>', fp); 1615 } 1616 1617 int 1618 keyword(const char *cp) 1619 { 1620 struct keytab *kt = keywords; 1621 1622 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1623 kt++; 1624 return(kt->kt_i); 1625 } 1626 1627 static void 1628 sodump(sup su, const char *which) 1629 { 1630 switch (su->sa.sa_family) { 1631 case AF_LINK: 1632 printf("%s: link %s; ", 1633 which, link_ntoa(&su->sdl)); 1634 break; 1635 case AF_INET: 1636 printf("%s: inet %s; ", 1637 which, inet_ntoa(su->sin.sin_addr)); 1638 break; 1639 } 1640 fflush(stdout); 1641 } 1642 1643 /* States*/ 1644 #define VIRGIN 0 1645 #define GOTONE 1 1646 #define GOTTWO 2 1647 /* Inputs */ 1648 #define DIGIT (4*0) 1649 #define END (4*1) 1650 #define DELIM (4*2) 1651 1652 static void 1653 sockaddr(const char *addr, struct sockaddr *sa) 1654 { 1655 char *cp = (char *)sa; 1656 int size = sa->sa_len; 1657 char *cplim = cp + size; 1658 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1659 1660 memset(cp, 0, size); 1661 cp++; 1662 do { 1663 if ((*addr >= '0') && (*addr <= '9')) { 1664 new = *addr - '0'; 1665 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1666 new = *addr - 'a' + 10; 1667 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1668 new = *addr - 'A' + 10; 1669 } else if (*addr == '\0') 1670 state |= END; 1671 else 1672 state |= DELIM; 1673 addr++; 1674 switch (state /* | INPUT */) { 1675 case GOTTWO | DIGIT: 1676 *cp++ = byte; /*FALLTHROUGH*/ 1677 case VIRGIN | DIGIT: 1678 state = GOTONE; byte = new; continue; 1679 case GOTONE | DIGIT: 1680 state = GOTTWO; byte = new + (byte << 4); continue; 1681 default: /* | DELIM */ 1682 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1683 case GOTONE | END: 1684 case GOTTWO | END: 1685 *cp++ = byte; /* FALLTHROUGH */ 1686 case VIRGIN | END: 1687 break; 1688 } 1689 break; 1690 } while (cp < cplim); 1691 sa->sa_len = cp - (char *)sa; 1692 } 1693