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 * $DragonFly: src/sbin/route/route.c,v 1.13 2005/03/16 08:02:05 cpressey Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/file.h> 41 #include <sys/socket.h> 42 #include <sys/ioctl.h> 43 #include <sys/sysctl.h> 44 #include <sys/types.h> 45 46 #include <net/if.h> 47 #include <net/route.h> 48 #include <net/if_dl.h> 49 #include <netinet/in.h> 50 #include <netinet/if_ether.h> 51 #include <netatalk/at.h> 52 #ifdef NS 53 #include <netns/ns.h> 54 #endif 55 #include <arpa/inet.h> 56 #include <netdb.h> 57 58 #include <ctype.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <paths.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <sysexits.h> 66 #include <unistd.h> 67 #include <ifaddrs.h> 68 69 #include "extern.h" 70 #include "keywords.h" 71 72 union sockunion { 73 struct sockaddr sa; 74 struct sockaddr_in sin; 75 #ifdef INET6 76 struct sockaddr_in6 sin6; 77 #endif 78 struct sockaddr_at sat; 79 #ifdef NS 80 struct sockaddr_ns sns; 81 #endif 82 struct sockaddr_dl sdl; 83 struct sockaddr_inarp sinarp; 84 struct sockaddr_storage ss; /* added to avoid memory overrun */ 85 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 86 87 typedef union sockunion *sup; 88 89 int nflag, wflag; 90 91 static struct ortentry route; 92 static struct rt_metrics rt_metrics; 93 static int pid, rtm_addrs; 94 static int s; 95 static int forcehost, forcenet, af, qflag, tflag; 96 static int iflag, verbose, aflen = sizeof(struct sockaddr_in); 97 static int locking, lockrest, debugonly; 98 static u_long rtm_inits; 99 static uid_t uid; 100 #ifdef NS 101 static short ns_bh[] = {-1,-1,-1}; 102 #endif 103 104 static int atalk_aton(const char *, struct at_addr *); 105 static char *atalk_ntoa(struct at_addr); 106 static void flushroutes(int, char **); 107 static void set_metric(char *, int); 108 static void newroute(int, char **); 109 static void inet_makenetandmask(u_long, struct sockaddr_in *, u_long); 110 static void interfaces(void); 111 static void monitor(void); 112 static void sockaddr(char *, struct sockaddr *); 113 static void sodump(sup, const char *); 114 static void bprintf(FILE *, int, u_char *); 115 static void print_getmsg(struct rt_msghdr *, int); 116 static void print_rtmsg(struct rt_msghdr *, int); 117 static void pmsg_common(struct rt_msghdr *); 118 static void pmsg_addrs(char *, int); 119 static void mask_addr(void); 120 static int getaddr(int, char *, struct hostent **); 121 static int rtmsg(int, int); 122 static int prefixlen(const char *); 123 #ifdef INET6 124 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 125 #endif 126 127 void 128 usage(const char *cp) 129 { 130 if (cp != NULL) 131 warnx("bad keyword: %s", cp); 132 fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n"); 133 exit(EX_USAGE); 134 /* NOTREACHED */ 135 } 136 137 #define ROUNDUP(a) \ 138 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 139 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 140 141 int 142 main(int argc, char **argv) 143 { 144 int ch; 145 146 if (argc < 2) 147 usage((char *)NULL); 148 149 while ((ch = getopt(argc, argv, "wnqdtv")) != -1) 150 switch(ch) { 151 case 'w': 152 wflag = 1; 153 break; 154 case 'n': 155 nflag = 1; 156 break; 157 case 'q': 158 qflag = 1; 159 break; 160 case 'v': 161 verbose = 1; 162 break; 163 case 't': 164 tflag = 1; 165 break; 166 case 'd': 167 debugonly = 1; 168 break; 169 case '?': 170 default: 171 usage((char *)NULL); 172 } 173 argc -= optind; 174 argv += optind; 175 176 pid = getpid(); 177 uid = geteuid(); 178 if (tflag) 179 s = open(_PATH_DEVNULL, O_WRONLY, 0); 180 else 181 s = socket(PF_ROUTE, SOCK_RAW, 0); 182 if (s < 0) 183 err(EX_OSERR, "socket"); 184 if (*argv != NULL) 185 switch (keyword(*argv)) { 186 case K_GET: 187 uid = 0; 188 /* FALLTHROUGH */ 189 190 case K_CHANGE: 191 case K_ADD: 192 case K_DELETE: 193 newroute(argc, argv); 194 /* NOTREACHED */ 195 196 case K_SHOW: 197 show(argc, argv); 198 return(0); 199 200 case K_MONITOR: 201 monitor(); 202 /* NOTREACHED */ 203 204 case K_FLUSH: 205 flushroutes(argc, argv); 206 exit(0); 207 /* NOTREACHED */ 208 } 209 usage(*argv); 210 /* NOTREACHED */ 211 } 212 213 /* 214 * Purge all entries in the routing tables not 215 * associated with network interfaces. 216 */ 217 static void 218 flushroutes(int argc, char **argv) 219 { 220 size_t needed; 221 int mib[6], rlen, seqno; 222 char *buf, *next, *lim; 223 struct rt_msghdr *rtm; 224 225 if (uid != 0) { 226 errx(EX_NOPERM, "must be root to alter routing table"); 227 } 228 shutdown(s, 0); /* Don't want to read back our messages */ 229 if (argc > 1) { 230 argv++; 231 if (argc == 2 && **argv == '-') 232 switch (keyword(*argv + 1)) { 233 case K_INET: 234 af = AF_INET; 235 break; 236 #ifdef INET6 237 case K_INET6: 238 af = AF_INET6; 239 break; 240 #endif 241 case K_ATALK: 242 af = AF_APPLETALK; 243 break; 244 #ifdef NS 245 case K_XNS: 246 af = AF_NS; 247 break; 248 #endif 249 case K_LINK: 250 af = AF_LINK; 251 break; 252 default: 253 goto bad; 254 } else 255 bad: usage(*argv); 256 } 257 mib[0] = CTL_NET; 258 mib[1] = PF_ROUTE; 259 mib[2] = 0; /* protocol */ 260 mib[3] = 0; /* wildcard address family */ 261 mib[4] = NET_RT_DUMP; 262 mib[5] = 0; /* no flags */ 263 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 264 err(EX_OSERR, "route-sysctl-estimate"); 265 if ((buf = malloc(needed)) == NULL) 266 errx(EX_OSERR, "malloc failed"); 267 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 268 err(EX_OSERR, "route-sysctl-get"); 269 lim = buf + needed; 270 if (verbose) 271 printf("Examining routing table from sysctl\n"); 272 seqno = 0; /* ??? */ 273 for (next = buf; next < lim; next += rtm->rtm_msglen) { 274 rtm = (struct rt_msghdr *)next; 275 if (verbose) 276 print_rtmsg(rtm, rtm->rtm_msglen); 277 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 278 continue; 279 if (af != 0) { 280 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 281 282 if (sa->sa_family != af) 283 continue; 284 } 285 if (debugonly) 286 continue; 287 rtm->rtm_type = RTM_DELETE; 288 rtm->rtm_seq = seqno; 289 rlen = write(s, next, rtm->rtm_msglen); 290 if (rlen < (int)rtm->rtm_msglen) { 291 warn("write to routing socket"); 292 printf("got only %d for rlen\n", rlen); 293 break; 294 } 295 seqno++; 296 if (qflag) 297 continue; 298 if (verbose) { 299 print_rtmsg(rtm, rlen); 300 } else { 301 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 302 if (wflag) { 303 printf("%-20s ", rtm->rtm_flags & RTF_HOST ? 304 routename(sa) : netname(sa)); 305 } else { 306 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 307 routename(sa) : netname(sa)); 308 } 309 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + 310 (char *)sa); 311 if (wflag) { 312 printf("%-20s ", routename(sa)); 313 } else { 314 printf("%-20.20s ", routename(sa)); 315 } 316 printf("done\n"); 317 } 318 } 319 } 320 321 char * 322 routename(struct sockaddr *sa) 323 { 324 const char *cp; 325 static char line[MAXHOSTNAMELEN + 1]; 326 struct hostent *hp; 327 static char domain[MAXHOSTNAMELEN + 1]; 328 static int first = 1; 329 330 if (first) { 331 first = 0; 332 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 333 (cp = strchr(domain, '.'))) { 334 domain[MAXHOSTNAMELEN] = '\0'; 335 strcpy(domain, cp + 1); 336 } else 337 domain[0] = 0; 338 } 339 340 if (sa->sa_len == 0) 341 strcpy(line, "default"); 342 else switch (sa->sa_family) { 343 344 case AF_INET: 345 { struct in_addr in; 346 in = ((struct sockaddr_in *)sa)->sin_addr; 347 348 cp = NULL; 349 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 350 cp = "default"; 351 if (cp == NULL && !nflag) { 352 hp = gethostbyaddr((char *)&in, sizeof(struct in_addr), 353 AF_INET); 354 if (hp != NULL) { 355 char *cptr; 356 cptr = strchr(hp->h_name, '.'); 357 if (cptr != NULL && !wflag && 358 strcmp(cptr + 1, domain) == 0) 359 *cptr = '\0'; 360 cp = hp->h_name; 361 } 362 } 363 if (cp != NULL) { 364 strncpy(line, cp, sizeof(line) - 1); 365 line[sizeof(line) - 1] = '\0'; 366 } else 367 sprintf(line, "%s", inet_ntoa(in)); 368 break; 369 } 370 371 #ifdef INET6 372 case AF_INET6: 373 { 374 struct sockaddr_in6 sin6; /* use static var for safety */ 375 int niflags = 0; 376 #ifdef NI_WITHSCOPEID 377 niflags = NI_WITHSCOPEID; 378 #endif 379 380 memset(&sin6, 0, sizeof(sin6)); 381 memcpy(&sin6, sa, sa->sa_len); 382 sin6.sin6_len = sizeof(struct sockaddr_in6); 383 sin6.sin6_family = AF_INET6; 384 #ifdef __KAME__ 385 if (sa->sa_len == sizeof(struct sockaddr_in6) && 386 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 387 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 388 sin6.sin6_scope_id == 0) { 389 sin6.sin6_scope_id = 390 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 391 sin6.sin6_addr.s6_addr[2] = 0; 392 sin6.sin6_addr.s6_addr[3] = 0; 393 } 394 #endif 395 if (nflag) 396 niflags |= NI_NUMERICHOST; 397 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 398 line, sizeof(line), NULL, 0, niflags) != 0) 399 strncpy(line, "invalid", sizeof(line)); 400 401 return(line); 402 } 403 #endif 404 405 case AF_APPLETALK: 406 snprintf(line, sizeof(line), "atalk %s", 407 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 408 break; 409 410 #ifdef NS 411 case AF_NS: 412 return(ns_print((struct sockaddr_ns *)sa)); 413 #endif 414 415 case AF_LINK: 416 return(link_ntoa((struct sockaddr_dl *)sa)); 417 418 default: 419 { 420 /* 421 * Unknown address family; just render the raw 422 * data in sa->sa_data as hex values. 423 */ 424 uint8_t *sp = (uint8_t *)sa->sa_data; 425 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 426 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 427 char *cpe = line + sizeof(line); 428 429 while (sp < splim && cps < cpe) 430 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 431 break; 432 } 433 } 434 return(line); 435 } 436 437 /* 438 * Return the name of the network whose address is given. 439 * The address is assumed to be that of a net or subnet, not a host. 440 */ 441 char * 442 netname(struct sockaddr *sa) 443 { 444 const char *cp = 0; 445 static char line[MAXHOSTNAMELEN + 1]; 446 struct netent *np = 0; 447 u_long net, mask; 448 u_long i; 449 int subnetshift; 450 451 switch (sa->sa_family) { 452 453 case AF_INET: 454 { struct in_addr in; 455 in = ((struct sockaddr_in *)sa)->sin_addr; 456 457 i = in.s_addr = ntohl(in.s_addr); 458 if (in.s_addr == 0) 459 cp = "default"; 460 else if (!nflag) { 461 if (IN_CLASSA(i)) { 462 mask = IN_CLASSA_NET; 463 subnetshift = 8; 464 } else if (IN_CLASSB(i)) { 465 mask = IN_CLASSB_NET; 466 subnetshift = 8; 467 } else { 468 mask = IN_CLASSC_NET; 469 subnetshift = 4; 470 } 471 /* 472 * If there are more bits than the standard mask 473 * would suggest, subnets must be in use. 474 * Guess at the subnet mask, assuming reasonable 475 * width subnet fields. 476 */ 477 while (in.s_addr &~ mask) 478 mask = (long)mask >> subnetshift; 479 net = in.s_addr & mask; 480 while ((mask & 1) == 0) 481 mask >>= 1, net >>= 1; 482 np = getnetbyaddr(net, AF_INET); 483 if (np != NULL) 484 cp = np->n_name; 485 } 486 #define C(x) (unsigned)((x) & 0xff) 487 if (cp != NULL) 488 strncpy(line, cp, sizeof(line)); 489 else if ((in.s_addr & 0xffffff) == 0) 490 sprintf(line, "%u", C(in.s_addr >> 24)); 491 else if ((in.s_addr & 0xffff) == 0) 492 sprintf(line, "%u.%u", C(in.s_addr >> 24), 493 C(in.s_addr >> 16)); 494 else if ((in.s_addr & 0xff) == 0) 495 sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 496 C(in.s_addr >> 16), C(in.s_addr >> 8)); 497 else 498 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 499 C(in.s_addr >> 16), C(in.s_addr >> 8), 500 C(in.s_addr)); 501 #undef C 502 break; 503 } 504 505 #ifdef INET6 506 case AF_INET6: 507 { 508 struct sockaddr_in6 sin6; /* use static var for safety */ 509 int niflags = 0; 510 #ifdef NI_WITHSCOPEID 511 niflags = NI_WITHSCOPEID; 512 #endif 513 514 memset(&sin6, 0, sizeof(sin6)); 515 memcpy(&sin6, sa, sa->sa_len); 516 sin6.sin6_len = sizeof(struct sockaddr_in6); 517 sin6.sin6_family = AF_INET6; 518 #ifdef __KAME__ 519 if (sa->sa_len == sizeof(struct sockaddr_in6) && 520 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 521 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 522 sin6.sin6_scope_id == 0) { 523 sin6.sin6_scope_id = 524 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 525 sin6.sin6_addr.s6_addr[2] = 0; 526 sin6.sin6_addr.s6_addr[3] = 0; 527 } 528 #endif 529 if (nflag) 530 niflags |= NI_NUMERICHOST; 531 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 532 line, sizeof(line), NULL, 0, niflags) != 0) 533 strncpy(line, "invalid", sizeof(line)); 534 535 return(line); 536 } 537 #endif 538 539 case AF_APPLETALK: 540 snprintf(line, sizeof(line), "atalk %s", 541 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 542 break; 543 544 #ifdef NS 545 case AF_NS: 546 return(ns_print((struct sockaddr_ns *)sa)); 547 break; 548 #endif 549 550 case AF_LINK: 551 return(link_ntoa((struct sockaddr_dl *)sa)); 552 553 554 default: 555 { 556 /* 557 * Unknown address family; just render the raw 558 * data in sa->sa_data as hex values. 559 */ 560 uint8_t *sp = (uint8_t *)sa->sa_data; 561 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 562 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 563 char *cpe = line + sizeof(line); 564 565 while (sp < splim && cps < cpe) 566 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 567 break; 568 } 569 } 570 return(line); 571 } 572 573 static void 574 set_metric(char *value, int key) 575 { 576 int flag = 0; 577 u_long noval, *valp = &noval; 578 579 switch (key) { 580 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 581 caseof(K_MTU, RTV_MTU, rmx_mtu); 582 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 583 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 584 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 585 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 586 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 587 caseof(K_RTT, RTV_RTT, rmx_rtt); 588 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 589 } 590 rtm_inits |= flag; 591 if (lockrest || locking) 592 rt_metrics.rmx_locks |= flag; 593 if (locking) 594 locking = 0; 595 *valp = atoi(value); 596 } 597 598 static void 599 newroute(int argc, char **argv) 600 { 601 char *cmd; 602 const char *err_str, *dest = "", *gateway = ""; 603 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC; 604 int key; 605 struct hostent *hp = 0; 606 607 if (uid != 0) { 608 errx(EX_NOPERM, "must be root to alter routing table"); 609 } 610 cmd = argv[0]; 611 if (*cmd != 'g') 612 shutdown(s, 0); /* Don't want to read back our messages */ 613 while (--argc > 0) { 614 if (**(++argv)== '-') { 615 switch (key = keyword(1 + *argv)) { 616 case K_LINK: 617 af = AF_LINK; 618 aflen = sizeof(struct sockaddr_dl); 619 break; 620 case K_INET: 621 af = AF_INET; 622 aflen = sizeof(struct sockaddr_in); 623 break; 624 #ifdef INET6 625 case K_INET6: 626 af = AF_INET6; 627 aflen = sizeof(struct sockaddr_in6); 628 break; 629 #endif 630 case K_ATALK: 631 af = AF_APPLETALK; 632 aflen = sizeof(struct sockaddr_at); 633 break; 634 case K_SA: 635 af = PF_ROUTE; 636 aflen = sizeof(union sockunion); 637 break; 638 #ifdef NS 639 case K_XNS: 640 af = AF_NS; 641 aflen = sizeof(struct sockaddr_ns); 642 break; 643 #endif 644 case K_IFACE: 645 case K_INTERFACE: 646 iflag++; 647 break; 648 case K_NOSTATIC: 649 flags &= ~RTF_STATIC; 650 break; 651 case K_LLINFO: 652 flags |= RTF_LLINFO; 653 break; 654 case K_LOCK: 655 locking = 1; 656 break; 657 case K_LOCKREST: 658 lockrest = 1; 659 break; 660 case K_HOST: 661 forcehost++; 662 break; 663 case K_REJECT: 664 flags |= RTF_REJECT; 665 break; 666 case K_BLACKHOLE: 667 flags |= RTF_BLACKHOLE; 668 break; 669 case K_PROTO1: 670 flags |= RTF_PROTO1; 671 break; 672 case K_PROTO2: 673 flags |= RTF_PROTO2; 674 break; 675 case K_PROXY: 676 proxy = 1; 677 break; 678 case K_CLONING: 679 flags |= RTF_CLONING; 680 break; 681 case K_XRESOLVE: 682 flags |= RTF_XRESOLVE; 683 break; 684 case K_STATIC: 685 flags |= RTF_STATIC; 686 break; 687 case K_IFA: 688 if (--argc == 0) 689 usage((char *)NULL); 690 getaddr(RTA_IFA, *++argv, 0); 691 break; 692 case K_IFP: 693 if (--argc == 0) 694 usage((char *)NULL); 695 getaddr(RTA_IFP, *++argv, 0); 696 break; 697 case K_GENMASK: 698 if (--argc == 0) 699 usage((char *)NULL); 700 getaddr(RTA_GENMASK, *++argv, 0); 701 break; 702 case K_GATEWAY: 703 if (--argc == 0) 704 usage((char *)NULL); 705 getaddr(RTA_GATEWAY, *++argv, 0); 706 break; 707 case K_DST: 708 if (--argc == 0) 709 usage((char *)NULL); 710 ishost = getaddr(RTA_DST, *++argv, &hp); 711 dest = *argv; 712 break; 713 case K_NETMASK: 714 if (--argc == 0) 715 usage((char *)NULL); 716 getaddr(RTA_NETMASK, *++argv, 0); 717 /* FALLTHROUGH */ 718 case K_NET: 719 forcenet++; 720 break; 721 case K_PREFIXLEN: 722 if (--argc == 0) 723 usage((char *)NULL); 724 if (prefixlen(*++argv) == -1) { 725 forcenet = 0; 726 ishost = 1; 727 } else { 728 forcenet = 1; 729 ishost = 0; 730 } 731 break; 732 case K_MTU: 733 case K_HOPCOUNT: 734 case K_EXPIRE: 735 case K_RECVPIPE: 736 case K_SENDPIPE: 737 case K_SSTHRESH: 738 case K_RTT: 739 case K_RTTVAR: 740 if (--argc == 0) 741 usage((char *)NULL); 742 set_metric(*++argv, key); 743 break; 744 default: 745 usage(1+*argv); 746 } 747 } else { 748 if ((rtm_addrs & RTA_DST) == 0) { 749 dest = *argv; 750 ishost = getaddr(RTA_DST, *argv, &hp); 751 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 752 gateway = *argv; 753 getaddr(RTA_GATEWAY, *argv, &hp); 754 } else { 755 getaddr(RTA_NETMASK, *argv, 0); 756 forcenet = 1; 757 } 758 } 759 } 760 if (forcehost) { 761 ishost = 1; 762 #ifdef INET6 763 if (af == AF_INET6) { 764 rtm_addrs &= ~RTA_NETMASK; 765 memset((void *)&so_mask, 0, sizeof(so_mask)); 766 } 767 #endif 768 } 769 if (forcenet) 770 ishost = 0; 771 flags |= RTF_UP; 772 if (ishost) 773 flags |= RTF_HOST; 774 if (iflag == 0) 775 flags |= RTF_GATEWAY; 776 if (proxy) { 777 so_dst.sinarp.sin_other = SIN_PROXY; 778 flags |= RTF_ANNOUNCE; 779 } 780 for (attempts = 1; ; attempts++) { 781 errno = 0; 782 if ((ret = rtmsg(*cmd, flags)) == 0) 783 break; 784 if (errno != ENETUNREACH && errno != ESRCH) 785 break; 786 if (af == AF_INET && *gateway != '\0' && 787 hp != NULL && hp->h_addr_list[1] != NULL) { 788 hp->h_addr_list++; 789 memmove(&so_gate.sin.sin_addr, 790 hp->h_addr_list[0], 791 MIN((size_t)hp->h_length, 792 sizeof(so_gate.sin.sin_addr))); 793 } else 794 break; 795 } 796 if (*cmd == 'g') 797 exit(0); 798 if (!qflag) { 799 oerrno = errno; 800 printf("%s %s %s", cmd, ishost? "host" : "net", dest); 801 if (*gateway != '\0') { 802 printf(": gateway %s", gateway); 803 if (attempts > 1 && ret == 0 && af == AF_INET) 804 printf(" (%s)", 805 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 806 } 807 if (ret == 0) { 808 printf("\n"); 809 } else { 810 switch (oerrno) { 811 case ESRCH: 812 err_str = "not in table"; 813 break; 814 case EBUSY: 815 err_str = "entry in use"; 816 break; 817 case ENOBUFS: 818 err_str = "routing table overflow"; 819 break; 820 case EDQUOT: /* handle recursion avoidance in 821 rt_setgate() */ 822 err_str = "gateway uses the same route"; 823 break; 824 default: 825 err_str = strerror(oerrno); 826 break; 827 } 828 printf(": %s\n", err_str); 829 } 830 } 831 exit(ret != 0); 832 } 833 834 static void 835 inet_makenetandmask(u_long net, struct sockaddr_in *in, u_long bits) 836 { 837 u_long addr, mask = 0; 838 char *cp; 839 840 rtm_addrs |= RTA_NETMASK; 841 if (net == 0) 842 mask = addr = 0; 843 else if (net < 128) { 844 addr = net << IN_CLASSA_NSHIFT; 845 mask = IN_CLASSA_NET; 846 } else if (net < 65536) { 847 addr = net << IN_CLASSB_NSHIFT; 848 mask = IN_CLASSB_NET; 849 } else if (net < 16777216L) { 850 addr = net << IN_CLASSC_NSHIFT; 851 mask = IN_CLASSC_NET; 852 } else { 853 addr = net; 854 if ((addr & IN_CLASSA_HOST) == 0) 855 mask = IN_CLASSA_NET; 856 else if ((addr & IN_CLASSB_HOST) == 0) 857 mask = IN_CLASSB_NET; 858 else if ((addr & IN_CLASSC_HOST) == 0) 859 mask = IN_CLASSC_NET; 860 else 861 mask = -1; 862 } 863 if (bits != 0) 864 mask = 0xffffffff << (32 - bits); 865 in->sin_addr.s_addr = htonl(addr); 866 in = &so_mask.sin; 867 in->sin_addr.s_addr = htonl(mask); 868 in->sin_len = 0; 869 in->sin_family = 0; 870 cp = (char *)(&in->sin_addr + 1); 871 while (*--cp == 0 && cp > (char *)in) 872 ; 873 in->sin_len = 1 + cp - (char *)in; 874 } 875 876 #ifdef INET6 877 /* 878 * XXX the function may need more improvement... 879 */ 880 static int 881 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 882 { 883 struct in6_addr in6; 884 885 if (plen == NULL) { 886 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 887 sin6->sin6_scope_id == 0) { 888 plen = "0"; 889 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 890 /* aggregatable global unicast - RFC2374 */ 891 memset(&in6, 0, sizeof(in6)); 892 if (memcmp(&sin6->sin6_addr.s6_addr[8], 893 &in6.s6_addr[8], 8) == 0) 894 plen = "64"; 895 } 896 } 897 898 if (plen == NULL || strcmp(plen, "128") == 0) 899 return(1); 900 rtm_addrs |= RTA_NETMASK; 901 prefixlen(plen); 902 return(0); 903 } 904 #endif 905 906 /* 907 * Interpret an argument as a network address of some kind, 908 * returning 1 if a host address, 0 if a network address. 909 */ 910 static int 911 getaddr(int which, char *str, struct hostent **hpp) 912 { 913 sup su; 914 struct hostent *hp; 915 struct netent *np; 916 u_long val; 917 char *q; 918 int afamily; /* local copy of af so we can change it */ 919 920 if (af == 0) { 921 af = AF_INET; 922 aflen = sizeof(struct sockaddr_in); 923 } 924 afamily = af; 925 rtm_addrs |= which; 926 switch (which) { 927 case RTA_DST: 928 su = &so_dst; 929 break; 930 case RTA_GATEWAY: 931 su = &so_gate; 932 if (iflag) { 933 struct ifaddrs *ifap, *ifa; 934 struct sockaddr_dl *sdl = NULL; 935 936 if (getifaddrs(&ifap)) 937 err(1, "getifaddrs"); 938 939 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 940 if (ifa->ifa_addr->sa_family != AF_LINK) 941 continue; 942 943 if (strcmp(str, ifa->ifa_name) != 0) 944 continue; 945 946 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 947 } 948 /* If we found it, then use it */ 949 if (sdl != NULL) { 950 /* 951 * Copy is safe since we have a 952 * sockaddr_storage member in sockunion{}. 953 * Note that we need to copy before calling 954 * freeifaddrs(). 955 * 956 * Interface routes are routed only by their 957 * sdl_index or interface name (we provide 958 * both here), not by the ARP address of the 959 * local interface (alen, slen = 0). 960 */ 961 memcpy(&su->sdl, sdl, sdl->sdl_len); 962 su->sdl.sdl_alen = 0; 963 su->sdl.sdl_slen = 0; 964 } 965 freeifaddrs(ifap); 966 if (sdl != NULL) 967 return(1); 968 } 969 break; 970 case RTA_NETMASK: 971 su = &so_mask; 972 break; 973 case RTA_GENMASK: 974 su = &so_genmask; 975 break; 976 case RTA_IFP: 977 su = &so_ifp; 978 afamily = AF_LINK; 979 break; 980 case RTA_IFA: 981 su = &so_ifa; 982 break; 983 default: 984 usage("internal error"); 985 /*NOTREACHED*/ 986 } 987 su->sa.sa_len = aflen; 988 su->sa.sa_family = afamily; /* cases that don't want it have left 989 already */ 990 if (strcmp(str, "default") == 0) { 991 /* 992 * Default is net 0.0.0.0/0 993 */ 994 switch (which) { 995 case RTA_DST: 996 forcenet++; 997 /* bzero(su, sizeof(*su)); *//* for readability */ 998 getaddr(RTA_NETMASK, str, 0); 999 break; 1000 case RTA_NETMASK: 1001 case RTA_GENMASK: 1002 /* bzero(su, sizeof(*su)); *//* for readability */ 1003 break; 1004 } 1005 return(0); 1006 } 1007 switch (afamily) { 1008 #ifdef INET6 1009 case AF_INET6: 1010 { 1011 struct addrinfo hints, *res; 1012 1013 q = NULL; 1014 if (which == RTA_DST && (q = strchr(str, '/')) != NULL) 1015 *q = '\0'; 1016 memset(&hints, 0, sizeof(hints)); 1017 hints.ai_family = afamily; /*AF_INET6*/ 1018 hints.ai_flags = AI_NUMERICHOST; 1019 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1020 if (getaddrinfo(str, "0", &hints, &res) != 0 || 1021 res->ai_family != AF_INET6 || 1022 res->ai_addrlen != sizeof(su->sin6)) { 1023 fprintf(stderr, "%s: bad value\n", str); 1024 exit(1); 1025 } 1026 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1027 #ifdef __KAME__ 1028 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1029 IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) && 1030 su->sin6.sin6_scope_id) { 1031 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1032 htons(su->sin6.sin6_scope_id); 1033 su->sin6.sin6_scope_id = 0; 1034 } 1035 #endif 1036 freeaddrinfo(res); 1037 if (q != NULL) 1038 *q++ = '/'; 1039 if (which == RTA_DST) 1040 return(inet6_makenetandmask(&su->sin6, q)); 1041 return(0); 1042 } 1043 #endif /* INET6 */ 1044 1045 #ifdef NS 1046 case AF_NS: 1047 if (which == RTA_DST) { 1048 struct sockaddr_ns *sms = &(so_mask.sns); 1049 memset(sms, 0, sizeof(*sms)); 1050 sms->sns_family = 0; 1051 sms->sns_len = 6; 1052 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1053 rtm_addrs |= RTA_NETMASK; 1054 } 1055 su->sns.sns_addr = ns_addr(str); 1056 return(!ns_nullhost(su->sns.sns_addr)); 1057 #endif 1058 1059 1060 case AF_APPLETALK: 1061 if (!atalk_aton(str, &su->sat.sat_addr)) 1062 errx(EX_NOHOST, "bad address: %s", str); 1063 rtm_addrs |= RTA_NETMASK; 1064 return(forcehost || su->sat.sat_addr.s_node != 0); 1065 1066 case AF_LINK: 1067 link_addr(str, &su->sdl); 1068 return(1); 1069 1070 1071 case PF_ROUTE: 1072 su->sa.sa_len = sizeof(*su); 1073 sockaddr(str, &su->sa); 1074 return(1); 1075 1076 case AF_INET: 1077 default: 1078 break; 1079 } 1080 1081 if (hpp == NULL) 1082 hpp = &hp; 1083 *hpp = NULL; 1084 1085 q = strchr(str,'/'); 1086 if (q != NULL && which == RTA_DST) { 1087 *q = '\0'; 1088 if ((val = inet_network(str)) != INADDR_NONE) { 1089 inet_makenetandmask( 1090 val, &su->sin, strtoul(q+1, 0, 0)); 1091 return(0); 1092 } 1093 *q = '/'; 1094 } 1095 if ((which != RTA_DST || forcenet == 0) && 1096 inet_aton(str, &su->sin.sin_addr)) { 1097 val = su->sin.sin_addr.s_addr; 1098 if (which != RTA_DST || 1099 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1100 return(1); 1101 else { 1102 val = ntohl(val); 1103 goto netdone; 1104 } 1105 } 1106 if (which == RTA_DST && forcehost == 0 && 1107 ((val = inet_network(str)) != INADDR_NONE || 1108 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1109 netdone: 1110 inet_makenetandmask(val, &su->sin, 0); 1111 return(0); 1112 } 1113 hp = gethostbyname(str); 1114 if (hp != NULL) { 1115 *hpp = hp; 1116 su->sin.sin_family = hp->h_addrtype; 1117 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1118 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr))); 1119 return(1); 1120 } 1121 errx(EX_NOHOST, "bad address: %s", str); 1122 } 1123 1124 static int 1125 prefixlen(const char *len_str) 1126 { 1127 int len = atoi(len_str), q, r; 1128 int max; 1129 char *p; 1130 1131 rtm_addrs |= RTA_NETMASK; 1132 switch (af) { 1133 #ifdef INET6 1134 case AF_INET6: 1135 max = 128; 1136 p = (char *)&so_mask.sin6.sin6_addr; 1137 break; 1138 #endif 1139 case AF_INET: 1140 max = 32; 1141 p = (char *)&so_mask.sin.sin_addr; 1142 break; 1143 default: 1144 fprintf(stderr, "prefixlen not supported in this af\n"); 1145 exit(1); 1146 /*NOTREACHED*/ 1147 } 1148 1149 if (len < 0 || max < len) { 1150 fprintf(stderr, "%s: bad value\n", len_str); 1151 exit(1); 1152 } 1153 1154 q = len >> 3; 1155 r = len & 7; 1156 so_mask.sa.sa_family = af; 1157 so_mask.sa.sa_len = aflen; 1158 memset((void *)p, 0, max / 8); 1159 if (q > 0) 1160 memset((void *)p, 0xff, q); 1161 if (r > 0) 1162 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1163 if (len == max) 1164 return(-1); 1165 else 1166 return(len); 1167 } 1168 1169 #ifdef NS 1170 short ns_nullh[] = {0,0,0}; 1171 1172 char * 1173 ns_print(struct sockaddr_ns *sns) 1174 { 1175 struct ns_addr work; 1176 union { union ns_net net_e; u_long long_e; } net; 1177 u_short port; 1178 static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25]; 1179 const char *host = ""; 1180 char *p; 1181 u_char *q; 1182 1183 work = sns->sns_addr; 1184 port = ntohs(work.x_port); 1185 work.x_port = 0; 1186 net.net_e = work.x_net; 1187 if (ns_nullhost(work) && net.long_e == 0) { 1188 if (port == 0) 1189 strncpy(mybuf, "*.*", sizeof(mybuf)); 1190 else 1191 sprintf(mybuf, "*.%XH", port); 1192 return(mybuf); 1193 } 1194 1195 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1196 host = "any"; 1197 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1198 host = "*"; 1199 else { 1200 q = work.x_host.c_host; 1201 sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 1202 q[0], q[1], q[2], q[3], q[4], q[5]); 1203 for (p = chost; *p == '0' && p < chost + 12; p++) 1204 /* void */; 1205 host = p; 1206 } 1207 if (port != 0) 1208 sprintf(cport, ".%XH", htons(port)); 1209 else 1210 *cport = 0; 1211 1212 snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s", 1213 (unsigned long)ntohl(net.long_e), 1214 host, cport); 1215 return(mybuf); 1216 } 1217 #endif 1218 1219 static void 1220 interfaces(void) 1221 { 1222 size_t needed; 1223 int mib[6]; 1224 char *buf, *lim, *next; 1225 struct rt_msghdr *rtm; 1226 1227 mib[0] = CTL_NET; 1228 mib[1] = PF_ROUTE; 1229 mib[2] = 0; /* protocol */ 1230 mib[3] = 0; /* wildcard address family */ 1231 mib[4] = NET_RT_IFLIST; 1232 mib[5] = 0; /* no flags */ 1233 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1234 err(EX_OSERR, "route-sysctl-estimate"); 1235 if ((buf = malloc(needed)) == NULL) 1236 errx(EX_OSERR, "malloc failed"); 1237 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1238 err(EX_OSERR, "actual retrieval of interface table"); 1239 lim = buf + needed; 1240 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1241 rtm = (struct rt_msghdr *)next; 1242 print_rtmsg(rtm, rtm->rtm_msglen); 1243 } 1244 } 1245 1246 static void 1247 monitor(void) 1248 { 1249 int n; 1250 char msg[2048]; 1251 1252 verbose = 1; 1253 if (debugonly) { 1254 interfaces(); 1255 exit(0); 1256 } 1257 for (;;) { 1258 time_t now; 1259 n = read(s, msg, 2048); 1260 now = time(NULL); 1261 printf("\ngot message of size %d on %s", n, ctime(&now)); 1262 print_rtmsg((struct rt_msghdr *)msg, n); 1263 } 1264 } 1265 1266 struct { 1267 struct rt_msghdr m_rtm; 1268 char m_space[512]; 1269 } m_rtmsg; 1270 1271 static int 1272 rtmsg(int cmd, int flags) 1273 { 1274 static int seq; 1275 int rlen; 1276 char *cp = m_rtmsg.m_space; 1277 int l; 1278 1279 #define NEXTADDR(w, u) \ 1280 if (rtm_addrs & (w)) {\ 1281 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1282 if (verbose) sodump(&(u),"u");\ 1283 } 1284 1285 errno = 0; 1286 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1287 if (cmd == 'a') 1288 cmd = RTM_ADD; 1289 else if (cmd == 'c') 1290 cmd = RTM_CHANGE; 1291 else if (cmd == 'g') { 1292 cmd = RTM_GET; 1293 if (so_ifp.sa.sa_family == 0) { 1294 so_ifp.sa.sa_family = AF_LINK; 1295 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1296 rtm_addrs |= RTA_IFP; 1297 } 1298 } else 1299 cmd = RTM_DELETE; 1300 #define rtm m_rtmsg.m_rtm 1301 rtm.rtm_type = cmd; 1302 rtm.rtm_flags = flags; 1303 rtm.rtm_version = RTM_VERSION; 1304 rtm.rtm_seq = ++seq; 1305 rtm.rtm_addrs = rtm_addrs; 1306 rtm.rtm_rmx = rt_metrics; 1307 rtm.rtm_inits = rtm_inits; 1308 1309 if (rtm_addrs & RTA_NETMASK) 1310 mask_addr(); 1311 NEXTADDR(RTA_DST, so_dst); 1312 NEXTADDR(RTA_GATEWAY, so_gate); 1313 NEXTADDR(RTA_NETMASK, so_mask); 1314 NEXTADDR(RTA_GENMASK, so_genmask); 1315 NEXTADDR(RTA_IFP, so_ifp); 1316 NEXTADDR(RTA_IFA, so_ifa); 1317 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1318 if (verbose) 1319 print_rtmsg(&rtm, l); 1320 if (debugonly) 1321 return(0); 1322 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1323 warn("writing to routing socket"); 1324 return(-1); 1325 } 1326 if (cmd == RTM_GET) { 1327 do { 1328 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1329 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1330 if (l < 0) 1331 warn("read from routing socket"); 1332 else 1333 print_getmsg(&rtm, l); 1334 } 1335 #undef rtm 1336 return(0); 1337 } 1338 1339 static void 1340 mask_addr(void) 1341 { 1342 int olen = so_mask.sa.sa_len; 1343 char *cp1 = olen + (char *)&so_mask, *cp2; 1344 1345 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1346 if (*--cp1 != 0) { 1347 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1348 break; 1349 } 1350 if ((rtm_addrs & RTA_DST) == 0) 1351 return; 1352 switch (so_dst.sa.sa_family) { 1353 #ifdef NS 1354 case AF_NS: 1355 #endif 1356 case AF_INET: 1357 #ifdef INET6 1358 case AF_INET6: 1359 #endif 1360 case AF_APPLETALK: 1361 case 0: 1362 return; 1363 } 1364 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1365 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1366 while (cp2 > cp1) 1367 *--cp2 = 0; 1368 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1369 while (cp1 > so_dst.sa.sa_data) 1370 *--cp1 &= *--cp2; 1371 } 1372 1373 const char *msgtypes[] = { 1374 "", 1375 "RTM_ADD: Add Route", 1376 "RTM_DELETE: Delete Route", 1377 "RTM_CHANGE: Change Metrics or flags", 1378 "RTM_GET: Report Metrics", 1379 "RTM_LOSING: Kernel Suspects Partitioning", 1380 "RTM_REDIRECT: Told to use different route", 1381 "RTM_MISS: Lookup failed on this address", 1382 "RTM_LOCK: fix specified metrics", 1383 "RTM_OLDADD: caused by SIOCADDRT", 1384 "RTM_OLDDEL: caused by SIOCDELRT", 1385 "RTM_RESOLVE: Route created by cloning", 1386 "RTM_NEWADDR: address being added to iface", 1387 "RTM_DELADDR: address being removed from iface", 1388 "RTM_IFINFO: iface status change", 1389 "RTM_NEWMADDR: new multicast group membership on iface", 1390 "RTM_DELMADDR: multicast group membership removed from iface", 1391 "RTM_IFANNOUNCE: interface arrival/departure", 1392 0, 1393 }; 1394 1395 char metricnames[] = 1396 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount" 1397 "\1mtu"; 1398 char routeflags[] = 1399 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT" 1400 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016" 1401 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE" 1402 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST"; 1403 char ifnetflags[] = 1404 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1405 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1406 "\017LINK2\020MULTICAST"; 1407 char addrnames[] = 1408 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1409 1410 static void 1411 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused) 1412 { 1413 struct if_msghdr *ifm; 1414 struct ifa_msghdr *ifam; 1415 #ifdef RTM_NEWMADDR 1416 struct ifma_msghdr *ifmam; 1417 #endif 1418 struct if_announcemsghdr *ifan; 1419 1420 if (verbose == 0) 1421 return; 1422 if (rtm->rtm_version != RTM_VERSION) { 1423 printf("routing message version %d not understood\n", 1424 rtm->rtm_version); 1425 return; 1426 } 1427 if (msgtypes[rtm->rtm_type] != NULL) 1428 printf("%s: ", msgtypes[rtm->rtm_type]); 1429 else 1430 printf("#%d: ", rtm->rtm_type); 1431 printf("len %d, ", rtm->rtm_msglen); 1432 switch (rtm->rtm_type) { 1433 case RTM_IFINFO: 1434 ifm = (struct if_msghdr *)rtm; 1435 printf("if# %d, flags:", ifm->ifm_index); 1436 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1437 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1438 break; 1439 case RTM_NEWADDR: 1440 case RTM_DELADDR: 1441 ifam = (struct ifa_msghdr *)rtm; 1442 printf("metric %d, flags:", ifam->ifam_metric); 1443 bprintf(stdout, ifam->ifam_flags, routeflags); 1444 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1445 break; 1446 #ifdef RTM_NEWMADDR 1447 case RTM_NEWMADDR: 1448 case RTM_DELMADDR: 1449 ifmam = (struct ifma_msghdr *)rtm; 1450 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1451 break; 1452 #endif 1453 case RTM_IFANNOUNCE: 1454 ifan = (struct if_announcemsghdr *)rtm; 1455 printf("if# %d, what: ", ifan->ifan_index); 1456 switch (ifan->ifan_what) { 1457 case IFAN_ARRIVAL: 1458 printf("arrival"); 1459 break; 1460 case IFAN_DEPARTURE: 1461 printf("departure"); 1462 break; 1463 default: 1464 printf("#%d", ifan->ifan_what); 1465 break; 1466 } 1467 printf("\n"); 1468 break; 1469 1470 default: 1471 printf("pid: %ld, seq %d, errno %d, flags:", 1472 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1473 bprintf(stdout, rtm->rtm_flags, routeflags); 1474 pmsg_common(rtm); 1475 } 1476 } 1477 1478 static void 1479 print_getmsg(struct rt_msghdr *rtm, int msglen) 1480 { 1481 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1482 struct sockaddr_dl *ifp = NULL; 1483 struct sockaddr *sa; 1484 char *cp; 1485 int i; 1486 1487 printf(" route to: %s\n", routename(&so_dst.sa)); 1488 if (rtm->rtm_version != RTM_VERSION) { 1489 warnx("routing message version %d not understood", 1490 rtm->rtm_version); 1491 return; 1492 } 1493 if (rtm->rtm_msglen > msglen) { 1494 warnx("message length mismatch, in packet %d, returned %d", 1495 rtm->rtm_msglen, msglen); 1496 } 1497 if (rtm->rtm_errno != 0) { 1498 errno = rtm->rtm_errno; 1499 warn("message indicates error %d", errno); 1500 return; 1501 } 1502 cp = ((char *)(rtm + 1)); 1503 if (rtm->rtm_addrs) 1504 for (i = 1; i != 0; i <<= 1) 1505 if (i & rtm->rtm_addrs) { 1506 sa = (struct sockaddr *)cp; 1507 switch (i) { 1508 case RTA_DST: 1509 dst = sa; 1510 break; 1511 case RTA_GATEWAY: 1512 gate = sa; 1513 break; 1514 case RTA_NETMASK: 1515 mask = sa; 1516 break; 1517 case RTA_IFP: 1518 if (sa->sa_family == AF_LINK && 1519 ((struct sockaddr_dl *)sa)->sdl_nlen) 1520 ifp = (struct sockaddr_dl *)sa; 1521 break; 1522 } 1523 ADVANCE(cp, sa); 1524 } 1525 if (dst != NULL && mask != NULL) 1526 mask->sa_family = dst->sa_family; /* XXX */ 1527 if (dst != NULL) 1528 printf("destination: %s\n", routename(dst)); 1529 if (mask != NULL) { 1530 int savenflag = nflag; 1531 1532 nflag = 1; 1533 printf(" mask: %s\n", routename(mask)); 1534 nflag = savenflag; 1535 } 1536 if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY) 1537 printf(" gateway: %s\n", routename(gate)); 1538 if (ifp != NULL) 1539 printf(" interface: %.*s\n", 1540 ifp->sdl_nlen, ifp->sdl_data); 1541 printf(" flags: "); 1542 bprintf(stdout, rtm->rtm_flags, routeflags); 1543 1544 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1545 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1546 1547 printf("\n%s\n", "\ 1548 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1549 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1550 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1551 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1552 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1553 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1554 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1555 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1556 if (rtm->rtm_rmx.rmx_expire != 0) 1557 rtm->rtm_rmx.rmx_expire -= time(0); 1558 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1559 #undef lock 1560 #undef msec 1561 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1562 if (verbose) 1563 pmsg_common(rtm); 1564 else if (rtm->rtm_addrs &~ RTA_IGN) { 1565 printf("sockaddrs: "); 1566 bprintf(stdout, rtm->rtm_addrs, addrnames); 1567 putchar('\n'); 1568 } 1569 #undef RTA_IGN 1570 } 1571 1572 static void 1573 pmsg_common(struct rt_msghdr *rtm) 1574 { 1575 printf("\nlocks: "); 1576 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1577 printf(" inits: "); 1578 bprintf(stdout, rtm->rtm_inits, metricnames); 1579 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1580 } 1581 1582 static void 1583 pmsg_addrs(char *cp, int addrs) 1584 { 1585 struct sockaddr *sa; 1586 int i; 1587 1588 if (addrs == 0) { 1589 putchar('\n'); 1590 return; 1591 } 1592 printf("\nsockaddrs: "); 1593 bprintf(stdout, addrs, addrnames); 1594 putchar('\n'); 1595 for (i = 1; i != 0; i <<= 1) 1596 if (i & addrs) { 1597 sa = (struct sockaddr *)cp; 1598 printf(" %s", routename(sa)); 1599 ADVANCE(cp, sa); 1600 } 1601 putchar('\n'); 1602 fflush(stdout); 1603 } 1604 1605 static void 1606 bprintf(FILE *fp, int b, u_char *str) 1607 { 1608 int i; 1609 int gotsome = 0; 1610 1611 if (b == 0) 1612 return; 1613 while ((i = *str++) != 0) { 1614 if (b & (1 << (i-1))) { 1615 if (!gotsome) 1616 i = '<'; 1617 else 1618 i = ','; 1619 putc(i, fp); 1620 gotsome = 1; 1621 for (; (i = *str) > 32; str++) 1622 putc(i, fp); 1623 } else 1624 while (*str > 32) 1625 str++; 1626 } 1627 if (gotsome) 1628 putc('>', fp); 1629 } 1630 1631 int 1632 keyword(const char *cp) 1633 { 1634 struct keytab *kt = keywords; 1635 1636 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1637 kt++; 1638 return(kt->kt_i); 1639 } 1640 1641 static void 1642 sodump(sup su, const char *which) 1643 { 1644 switch (su->sa.sa_family) { 1645 case AF_LINK: 1646 printf("%s: link %s; ", 1647 which, link_ntoa(&su->sdl)); 1648 break; 1649 case AF_INET: 1650 printf("%s: inet %s; ", 1651 which, inet_ntoa(su->sin.sin_addr)); 1652 break; 1653 case AF_APPLETALK: 1654 printf("%s: atalk %s; ", 1655 which, atalk_ntoa(su->sat.sat_addr)); 1656 break; 1657 #ifdef NS 1658 case AF_NS: 1659 printf("%s: xns %s; ", 1660 which, ns_ntoa(su->sns.sns_addr)); 1661 break; 1662 #endif 1663 } 1664 fflush(stdout); 1665 } 1666 1667 /* States*/ 1668 #define VIRGIN 0 1669 #define GOTONE 1 1670 #define GOTTWO 2 1671 /* Inputs */ 1672 #define DIGIT (4*0) 1673 #define END (4*1) 1674 #define DELIM (4*2) 1675 1676 static void 1677 sockaddr(char *addr, struct sockaddr *sa) 1678 { 1679 char *cp = (char *)sa; 1680 int size = sa->sa_len; 1681 char *cplim = cp + size; 1682 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1683 1684 memset(cp, 0, size); 1685 cp++; 1686 do { 1687 if ((*addr >= '0') && (*addr <= '9')) { 1688 new = *addr - '0'; 1689 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1690 new = *addr - 'a' + 10; 1691 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1692 new = *addr - 'A' + 10; 1693 } else if (*addr == '\0') 1694 state |= END; 1695 else 1696 state |= DELIM; 1697 addr++; 1698 switch (state /* | INPUT */) { 1699 case GOTTWO | DIGIT: 1700 *cp++ = byte; /*FALLTHROUGH*/ 1701 case VIRGIN | DIGIT: 1702 state = GOTONE; byte = new; continue; 1703 case GOTONE | DIGIT: 1704 state = GOTTWO; byte = new + (byte << 4); continue; 1705 default: /* | DELIM */ 1706 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1707 case GOTONE | END: 1708 case GOTTWO | END: 1709 *cp++ = byte; /* FALLTHROUGH */ 1710 case VIRGIN | END: 1711 break; 1712 } 1713 break; 1714 } while (cp < cplim); 1715 sa->sa_len = cp - (char *)sa; 1716 } 1717 1718 static int 1719 atalk_aton(const char *text, struct at_addr *addr) 1720 { 1721 u_int net, node; 1722 1723 if (sscanf(text, "%u.%u", &net, &node) != 2 1724 || net > 0xffff || node > 0xff) 1725 return(0); 1726 addr->s_net = htons(net); 1727 addr->s_node = node; 1728 return(1); 1729 } 1730 1731 static char * 1732 atalk_ntoa(struct at_addr at) 1733 { 1734 static char buf[20]; 1735 1736 snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1737 return(buf); 1738 } 1739