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