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 1.16 2007/09/10 15:13:55 dillon 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 int cpuflag = -1; 91 92 static struct ortentry route; 93 static struct rt_metrics rt_metrics; 94 static int pid, rtm_addrs; 95 static int s; 96 static int forcehost, forcenet, af, qflag, tflag; 97 static int iflag, verbose, aflen = sizeof(struct sockaddr_in); 98 static int locking, lockrest, debugonly; 99 static u_long rtm_inits; 100 static uid_t uid; 101 #ifdef NS 102 static short ns_bh[] = {-1,-1,-1}; 103 #endif 104 105 static int atalk_aton(const char *, struct at_addr *); 106 static char *atalk_ntoa(struct at_addr); 107 static void flushroutes(int, char **); 108 static void set_metric(char *, int); 109 static void newroute(int, char **); 110 static void inet_makenetandmask(u_long, struct sockaddr_in *, u_long); 111 static void interfaces(void); 112 static void monitor(void); 113 static void sockaddr(char *, struct sockaddr *); 114 static void sodump(sup, const char *); 115 static void bprintf(FILE *, int, u_char *); 116 static void print_getmsg(struct rt_msghdr *, int); 117 static void print_rtmsg(struct rt_msghdr *, int); 118 static void pmsg_common(struct rt_msghdr *); 119 static void pmsg_addrs(char *, int); 120 static void mask_addr(void); 121 static int getaddr(int, char *, struct hostent **); 122 static int rtmsg(int, int); 123 static int prefixlen(const char *); 124 #ifdef INET6 125 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); 126 #endif 127 128 void 129 usage(const char *cp) 130 { 131 if (cp != NULL) 132 warnx("bad keyword: %s", cp); 133 fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n"); 134 exit(EX_USAGE); 135 /* NOTREACHED */ 136 } 137 138 #define ROUNDUP(a) \ 139 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 140 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 141 142 int 143 main(int argc, char **argv) 144 { 145 int ch; 146 147 if (argc < 2) 148 usage((char *)NULL); 149 150 while ((ch = getopt(argc, argv, "c:wnqdtv")) != -1) 151 switch(ch) { 152 case 'c': 153 cpuflag = strtol(optarg, NULL, 0); 154 break; 155 case 'w': 156 wflag = 1; 157 break; 158 case 'n': 159 nflag = 1; 160 break; 161 case 'q': 162 qflag = 1; 163 break; 164 case 'v': 165 verbose = 1; 166 break; 167 case 't': 168 tflag = 1; 169 break; 170 case 'd': 171 debugonly = 1; 172 break; 173 case '?': 174 default: 175 usage((char *)NULL); 176 } 177 argc -= optind; 178 argv += optind; 179 180 pid = getpid(); 181 uid = geteuid(); 182 if (tflag) 183 s = open(_PATH_DEVNULL, O_WRONLY, 0); 184 else 185 s = socket(PF_ROUTE, SOCK_RAW, 0); 186 if (s < 0) 187 err(EX_OSERR, "socket"); 188 if (*argv != NULL) 189 switch (keyword(*argv)) { 190 case K_GET: 191 uid = 0; 192 /* FALLTHROUGH */ 193 194 case K_CHANGE: 195 case K_ADD: 196 case K_DELETE: 197 newroute(argc, argv); 198 /* NOTREACHED */ 199 200 case K_SHOW: 201 show(argc, argv); 202 return(0); 203 204 case K_MONITOR: 205 monitor(); 206 /* NOTREACHED */ 207 208 case K_FLUSH: 209 flushroutes(argc, argv); 210 exit(0); 211 /* NOTREACHED */ 212 } 213 usage(*argv); 214 /* NOTREACHED */ 215 } 216 217 /* 218 * Purge all entries in the routing tables not 219 * associated with network interfaces. 220 */ 221 static void 222 flushroutes(int argc, char **argv) 223 { 224 size_t needed; 225 int mib[7], rlen, seqno; 226 int miblen; 227 char *buf, *next, *lim; 228 struct rt_msghdr *rtm; 229 230 if (uid != 0) { 231 errx(EX_NOPERM, "must be root to alter routing table"); 232 } 233 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 234 if (argc > 1) { 235 argv++; 236 if (argc == 2 && **argv == '-') 237 switch (keyword(*argv + 1)) { 238 case K_INET: 239 af = AF_INET; 240 break; 241 #ifdef INET6 242 case K_INET6: 243 af = AF_INET6; 244 break; 245 #endif 246 case K_ATALK: 247 af = AF_APPLETALK; 248 break; 249 #ifdef NS 250 case K_XNS: 251 af = AF_NS; 252 break; 253 #endif 254 case K_LINK: 255 af = AF_LINK; 256 break; 257 default: 258 goto bad; 259 } else 260 bad: usage(*argv); 261 } 262 mib[0] = CTL_NET; 263 mib[1] = PF_ROUTE; 264 mib[2] = 0; /* protocol */ 265 mib[3] = 0; /* wildcard address family */ 266 mib[4] = NET_RT_DUMP; 267 mib[5] = 0; /* no flags */ 268 if (cpuflag >= 0) { 269 mib[6] = cpuflag; 270 miblen = 7; 271 } else { 272 miblen = 6; 273 } 274 if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) 275 err(EX_OSERR, "route-sysctl-estimate"); 276 if ((buf = malloc(needed)) == NULL) 277 errx(EX_OSERR, "malloc failed"); 278 if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) 279 err(EX_OSERR, "route-sysctl-get"); 280 lim = buf + needed; 281 if (verbose) 282 printf("Examining routing table from sysctl\n"); 283 seqno = 0; /* ??? */ 284 for (next = buf; next < lim; next += rtm->rtm_msglen) { 285 rtm = (struct rt_msghdr *)next; 286 if (verbose) 287 print_rtmsg(rtm, rtm->rtm_msglen); 288 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 289 continue; 290 if (af != 0) { 291 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 292 293 if (sa->sa_family != af) 294 continue; 295 } 296 if (debugonly) 297 continue; 298 rtm->rtm_type = RTM_DELETE; 299 rtm->rtm_seq = seqno; 300 rlen = write(s, next, rtm->rtm_msglen); 301 if (rlen < (int)rtm->rtm_msglen) { 302 warn("write to routing socket"); 303 printf("got only %d for rlen\n", rlen); 304 break; 305 } 306 seqno++; 307 if (qflag) 308 continue; 309 if (verbose) { 310 print_rtmsg(rtm, rlen); 311 } else { 312 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 313 if (wflag) { 314 printf("%-20s ", rtm->rtm_flags & RTF_HOST ? 315 routename(sa) : netname(sa)); 316 } else { 317 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 318 routename(sa) : netname(sa)); 319 } 320 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + 321 (char *)sa); 322 if (wflag) { 323 printf("%-20s ", routename(sa)); 324 } else { 325 printf("%-20.20s ", routename(sa)); 326 } 327 printf("done\n"); 328 } 329 } 330 } 331 332 char * 333 routename(struct sockaddr *sa) 334 { 335 const char *cp; 336 static char line[MAXHOSTNAMELEN + 1]; 337 struct hostent *hp; 338 static char domain[MAXHOSTNAMELEN + 1]; 339 static int first = 1; 340 341 if (first) { 342 first = 0; 343 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 344 (cp = strchr(domain, '.'))) { 345 domain[MAXHOSTNAMELEN] = '\0'; 346 strcpy(domain, cp + 1); 347 } else 348 domain[0] = 0; 349 } 350 351 if (sa->sa_len == 0) 352 strcpy(line, "default"); 353 else switch (sa->sa_family) { 354 355 case AF_INET: 356 { struct in_addr in; 357 in = ((struct sockaddr_in *)sa)->sin_addr; 358 359 cp = NULL; 360 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 361 cp = "default"; 362 if (cp == NULL && !nflag) { 363 hp = gethostbyaddr((char *)&in, sizeof(struct in_addr), 364 AF_INET); 365 if (hp != NULL) { 366 char *cptr; 367 cptr = strchr(hp->h_name, '.'); 368 if (cptr != NULL && !wflag && 369 strcmp(cptr + 1, domain) == 0) 370 *cptr = '\0'; 371 cp = hp->h_name; 372 } 373 } 374 if (cp != NULL) { 375 strncpy(line, cp, sizeof(line) - 1); 376 line[sizeof(line) - 1] = '\0'; 377 } else 378 sprintf(line, "%s", inet_ntoa(in)); 379 break; 380 } 381 382 #ifdef INET6 383 case AF_INET6: 384 { 385 struct sockaddr_in6 sin6; /* use static var for safety */ 386 int niflags = 0; 387 #ifdef NI_WITHSCOPEID 388 niflags = NI_WITHSCOPEID; 389 #endif 390 391 memset(&sin6, 0, sizeof(sin6)); 392 memcpy(&sin6, sa, sa->sa_len); 393 sin6.sin6_len = sizeof(struct sockaddr_in6); 394 sin6.sin6_family = AF_INET6; 395 #ifdef __KAME__ 396 if (sa->sa_len == sizeof(struct sockaddr_in6) && 397 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 398 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 399 sin6.sin6_scope_id == 0) { 400 sin6.sin6_scope_id = 401 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 402 sin6.sin6_addr.s6_addr[2] = 0; 403 sin6.sin6_addr.s6_addr[3] = 0; 404 } 405 #endif 406 if (nflag) 407 niflags |= NI_NUMERICHOST; 408 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 409 line, sizeof(line), NULL, 0, niflags) != 0) 410 strncpy(line, "invalid", sizeof(line)); 411 412 return(line); 413 } 414 #endif 415 416 case AF_APPLETALK: 417 snprintf(line, sizeof(line), "atalk %s", 418 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 419 break; 420 421 #ifdef NS 422 case AF_NS: 423 return(ns_print((struct sockaddr_ns *)sa)); 424 #endif 425 426 case AF_LINK: 427 return(link_ntoa((struct sockaddr_dl *)sa)); 428 429 default: 430 { 431 /* 432 * Unknown address family; just render the raw 433 * data in sa->sa_data as hex values. 434 */ 435 uint8_t *sp = (uint8_t *)sa->sa_data; 436 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 437 char *cps = line + sprintf(line, "(%d)", sa->sa_family); 438 char *cpe = line + sizeof(line); 439 440 while (sp < splim && cps < cpe) 441 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 442 break; 443 } 444 } 445 return(line); 446 } 447 448 /* 449 * Return the name of the network whose address is given. 450 * The address is assumed to be that of a net or subnet, not a host. 451 */ 452 char * 453 netname(struct sockaddr *sa) 454 { 455 const char *cp = 0; 456 static char line[MAXHOSTNAMELEN + 1]; 457 struct netent *np = 0; 458 u_long net, mask; 459 u_long i; 460 int subnetshift; 461 462 switch (sa->sa_family) { 463 464 case AF_INET: 465 { struct in_addr in; 466 in = ((struct sockaddr_in *)sa)->sin_addr; 467 468 i = in.s_addr = ntohl(in.s_addr); 469 if (in.s_addr == 0) 470 cp = "default"; 471 else if (!nflag) { 472 if (IN_CLASSA(i)) { 473 mask = IN_CLASSA_NET; 474 subnetshift = 8; 475 } else if (IN_CLASSB(i)) { 476 mask = IN_CLASSB_NET; 477 subnetshift = 8; 478 } else { 479 mask = IN_CLASSC_NET; 480 subnetshift = 4; 481 } 482 /* 483 * If there are more bits than the standard mask 484 * would suggest, subnets must be in use. 485 * Guess at the subnet mask, assuming reasonable 486 * width subnet fields. 487 */ 488 while (in.s_addr &~ mask) 489 mask = (long)mask >> subnetshift; 490 net = in.s_addr & mask; 491 while ((mask & 1) == 0) 492 mask >>= 1, net >>= 1; 493 np = getnetbyaddr(net, AF_INET); 494 if (np != NULL) 495 cp = np->n_name; 496 } 497 #define C(x) (unsigned)((x) & 0xff) 498 if (cp != NULL) 499 strncpy(line, cp, sizeof(line)); 500 else if ((in.s_addr & 0xffffff) == 0) 501 sprintf(line, "%u", C(in.s_addr >> 24)); 502 else if ((in.s_addr & 0xffff) == 0) 503 sprintf(line, "%u.%u", C(in.s_addr >> 24), 504 C(in.s_addr >> 16)); 505 else if ((in.s_addr & 0xff) == 0) 506 sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 507 C(in.s_addr >> 16), C(in.s_addr >> 8)); 508 else 509 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 510 C(in.s_addr >> 16), C(in.s_addr >> 8), 511 C(in.s_addr)); 512 #undef C 513 break; 514 } 515 516 #ifdef INET6 517 case AF_INET6: 518 { 519 struct sockaddr_in6 sin6; /* use static var for safety */ 520 int niflags = 0; 521 #ifdef NI_WITHSCOPEID 522 niflags = NI_WITHSCOPEID; 523 #endif 524 525 memset(&sin6, 0, sizeof(sin6)); 526 memcpy(&sin6, sa, sa->sa_len); 527 sin6.sin6_len = sizeof(struct sockaddr_in6); 528 sin6.sin6_family = AF_INET6; 529 #ifdef __KAME__ 530 if (sa->sa_len == sizeof(struct sockaddr_in6) && 531 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 532 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 533 sin6.sin6_scope_id == 0) { 534 sin6.sin6_scope_id = 535 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 536 sin6.sin6_addr.s6_addr[2] = 0; 537 sin6.sin6_addr.s6_addr[3] = 0; 538 } 539 #endif 540 if (nflag) 541 niflags |= NI_NUMERICHOST; 542 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 543 line, sizeof(line), NULL, 0, niflags) != 0) 544 strncpy(line, "invalid", sizeof(line)); 545 546 return(line); 547 } 548 #endif 549 550 case AF_APPLETALK: 551 snprintf(line, sizeof(line), "atalk %s", 552 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 553 break; 554 555 #ifdef NS 556 case AF_NS: 557 return(ns_print((struct sockaddr_ns *)sa)); 558 break; 559 #endif 560 561 case AF_LINK: 562 return(link_ntoa((struct sockaddr_dl *)sa)); 563 564 565 default: 566 { 567 /* 568 * Unknown address family; just render the raw 569 * data in sa->sa_data as hex values. 570 */ 571 uint8_t *sp = (uint8_t *)sa->sa_data; 572 uint8_t *splim = (uint8_t *)sa + sa->sa_len; 573 char *cps = line + sprintf(line, "af %d:", sa->sa_family); 574 char *cpe = line + sizeof(line); 575 576 while (sp < splim && cps < cpe) 577 cps += snprintf(cps, cpe - cps, " %02x", *sp++); 578 break; 579 } 580 } 581 return(line); 582 } 583 584 static void 585 set_metric(char *value, int key) 586 { 587 int flag = 0; 588 u_long noval, *valp = &noval; 589 590 switch (key) { 591 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 592 caseof(K_MTU, RTV_MTU, rmx_mtu); 593 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 594 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 595 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 596 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 597 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 598 caseof(K_RTT, RTV_RTT, rmx_rtt); 599 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 600 } 601 rtm_inits |= flag; 602 if (lockrest || locking) 603 rt_metrics.rmx_locks |= flag; 604 if (locking) 605 locking = 0; 606 *valp = atoi(value); 607 } 608 609 static void 610 newroute(int argc, char **argv) 611 { 612 char *cmd; 613 const char *err_str, *dest = "", *gateway = ""; 614 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC; 615 int key; 616 struct hostent *hp = 0; 617 618 if (uid != 0) { 619 errx(EX_NOPERM, "must be root to alter routing table"); 620 } 621 cmd = argv[0]; 622 if (*cmd != 'g') 623 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 624 while (--argc > 0) { 625 if (**(++argv)== '-') { 626 switch (key = keyword(1 + *argv)) { 627 case K_LINK: 628 af = AF_LINK; 629 aflen = sizeof(struct sockaddr_dl); 630 break; 631 case K_INET: 632 af = AF_INET; 633 aflen = sizeof(struct sockaddr_in); 634 break; 635 #ifdef INET6 636 case K_INET6: 637 af = AF_INET6; 638 aflen = sizeof(struct sockaddr_in6); 639 break; 640 #endif 641 case K_ATALK: 642 af = AF_APPLETALK; 643 aflen = sizeof(struct sockaddr_at); 644 break; 645 case K_SA: 646 af = PF_ROUTE; 647 aflen = sizeof(union sockunion); 648 break; 649 #ifdef NS 650 case K_XNS: 651 af = AF_NS; 652 aflen = sizeof(struct sockaddr_ns); 653 break; 654 #endif 655 case K_IFACE: 656 case K_INTERFACE: 657 iflag++; 658 break; 659 case K_NOSTATIC: 660 flags &= ~RTF_STATIC; 661 break; 662 case K_LLINFO: 663 flags |= RTF_LLINFO; 664 break; 665 case K_LOCK: 666 locking = 1; 667 break; 668 case K_LOCKREST: 669 lockrest = 1; 670 break; 671 case K_HOST: 672 forcehost++; 673 break; 674 case K_REJECT: 675 flags |= RTF_REJECT; 676 break; 677 case K_BLACKHOLE: 678 flags |= RTF_BLACKHOLE; 679 break; 680 case K_PROTO1: 681 flags |= RTF_PROTO1; 682 break; 683 case K_PROTO2: 684 flags |= RTF_PROTO2; 685 break; 686 case K_PROXY: 687 proxy = 1; 688 break; 689 case K_CLONING: 690 flags |= RTF_CLONING; 691 break; 692 case K_XRESOLVE: 693 flags |= RTF_XRESOLVE; 694 break; 695 case K_STATIC: 696 flags |= RTF_STATIC; 697 break; 698 case K_IFA: 699 if (--argc == 0) 700 usage((char *)NULL); 701 getaddr(RTA_IFA, *++argv, 0); 702 break; 703 case K_IFP: 704 if (--argc == 0) 705 usage((char *)NULL); 706 getaddr(RTA_IFP, *++argv, 0); 707 break; 708 case K_GENMASK: 709 if (--argc == 0) 710 usage((char *)NULL); 711 getaddr(RTA_GENMASK, *++argv, 0); 712 break; 713 case K_GATEWAY: 714 if (--argc == 0) 715 usage((char *)NULL); 716 getaddr(RTA_GATEWAY, *++argv, 0); 717 break; 718 case K_DST: 719 if (--argc == 0) 720 usage((char *)NULL); 721 ishost = getaddr(RTA_DST, *++argv, &hp); 722 dest = *argv; 723 break; 724 case K_NETMASK: 725 if (--argc == 0) 726 usage((char *)NULL); 727 getaddr(RTA_NETMASK, *++argv, 0); 728 /* FALLTHROUGH */ 729 case K_NET: 730 forcenet++; 731 break; 732 case K_PREFIXLEN: 733 if (--argc == 0) 734 usage((char *)NULL); 735 if (prefixlen(*++argv) == -1) { 736 forcenet = 0; 737 ishost = 1; 738 } else { 739 forcenet = 1; 740 ishost = 0; 741 } 742 break; 743 case K_MTU: 744 case K_HOPCOUNT: 745 case K_EXPIRE: 746 case K_RECVPIPE: 747 case K_SENDPIPE: 748 case K_SSTHRESH: 749 case K_RTT: 750 case K_RTTVAR: 751 if (--argc == 0) 752 usage((char *)NULL); 753 set_metric(*++argv, key); 754 break; 755 default: 756 usage(1+*argv); 757 } 758 } else { 759 if ((rtm_addrs & RTA_DST) == 0) { 760 dest = *argv; 761 ishost = getaddr(RTA_DST, *argv, &hp); 762 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 763 gateway = *argv; 764 getaddr(RTA_GATEWAY, *argv, &hp); 765 } else { 766 getaddr(RTA_NETMASK, *argv, 0); 767 forcenet = 1; 768 } 769 } 770 } 771 if (forcehost) { 772 ishost = 1; 773 #ifdef INET6 774 if (af == AF_INET6) { 775 rtm_addrs &= ~RTA_NETMASK; 776 memset((void *)&so_mask, 0, sizeof(so_mask)); 777 } 778 #endif 779 } 780 if (forcenet) 781 ishost = 0; 782 flags |= RTF_UP; 783 if (ishost) 784 flags |= RTF_HOST; 785 if (iflag == 0) 786 flags |= RTF_GATEWAY; 787 if (proxy) { 788 so_dst.sinarp.sin_other = SIN_PROXY; 789 flags |= RTF_ANNOUNCE; 790 } 791 for (attempts = 1; ; attempts++) { 792 errno = 0; 793 if ((ret = rtmsg(*cmd, flags)) == 0) 794 break; 795 if (errno != ENETUNREACH && errno != ESRCH) 796 break; 797 if (af == AF_INET && *gateway != '\0' && 798 hp != NULL && hp->h_addr_list[1] != NULL) { 799 hp->h_addr_list++; 800 memmove(&so_gate.sin.sin_addr, 801 hp->h_addr_list[0], 802 MIN((size_t)hp->h_length, 803 sizeof(so_gate.sin.sin_addr))); 804 } else 805 break; 806 } 807 if (*cmd == 'g') 808 exit(0); 809 if (!qflag) { 810 oerrno = errno; 811 printf("%s %s %s", cmd, ishost? "host" : "net", dest); 812 if (*gateway != '\0') { 813 printf(": gateway %s", gateway); 814 if (attempts > 1 && ret == 0 && af == AF_INET) 815 printf(" (%s)", 816 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 817 } 818 if (ret == 0) { 819 printf("\n"); 820 } else { 821 switch (oerrno) { 822 case ESRCH: 823 err_str = "not in table"; 824 break; 825 case EBUSY: 826 err_str = "entry in use"; 827 break; 828 case ENOBUFS: 829 err_str = "routing table overflow"; 830 break; 831 case EDQUOT: /* handle recursion avoidance in 832 rt_setgate() */ 833 err_str = "gateway uses the same route"; 834 break; 835 default: 836 err_str = strerror(oerrno); 837 break; 838 } 839 printf(": %s\n", err_str); 840 } 841 } 842 exit(ret != 0); 843 } 844 845 static void 846 inet_makenetandmask(u_long net, struct sockaddr_in *in, u_long bits) 847 { 848 u_long addr, mask = 0; 849 char *cp; 850 851 rtm_addrs |= RTA_NETMASK; 852 if (net == 0) 853 mask = addr = 0; 854 else { 855 if (net <= 0xff) 856 addr = net << 24; 857 else if (net <= 0xffff) 858 addr = net << 16; 859 else if (net <= 0xffffff) 860 addr = net << 8; 861 else 862 addr = net; 863 864 if (bits) 865 mask = 0xffffffff << (32 - bits); 866 else { 867 if (IN_CLASSA(addr)) { 868 mask = IN_CLASSA_NET; 869 } else if (IN_CLASSB(addr)) { 870 mask = IN_CLASSB_NET; 871 } else if (IN_CLASSC(addr)) { 872 mask = IN_CLASSC_NET; 873 } else 874 mask = 0xffffffff; 875 } 876 addr &= mask; 877 } 878 in->sin_addr.s_addr = htonl(addr); 879 in = &so_mask.sin; 880 in->sin_addr.s_addr = htonl(mask); 881 in->sin_len = 0; 882 in->sin_family = 0; 883 cp = (char *)(&in->sin_addr + 1); 884 while (*--cp == 0 && cp > (char *)in) 885 ; 886 in->sin_len = 1 + cp - (char *)in; 887 } 888 889 #ifdef INET6 890 /* 891 * XXX the function may need more improvement... 892 */ 893 static int 894 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) 895 { 896 struct in6_addr in6; 897 898 if (plen == NULL) { 899 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 900 sin6->sin6_scope_id == 0) { 901 plen = "0"; 902 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 903 /* aggregatable global unicast - RFC2374 */ 904 memset(&in6, 0, sizeof(in6)); 905 if (memcmp(&sin6->sin6_addr.s6_addr[8], 906 &in6.s6_addr[8], 8) == 0) 907 plen = "64"; 908 } 909 } 910 911 if (plen == NULL || strcmp(plen, "128") == 0) 912 return(1); 913 rtm_addrs |= RTA_NETMASK; 914 prefixlen(plen); 915 return(0); 916 } 917 #endif 918 919 /* 920 * Interpret an argument as a network address of some kind, 921 * returning 1 if a host address, 0 if a network address. 922 */ 923 static int 924 getaddr(int which, char *str, struct hostent **hpp) 925 { 926 sup su; 927 struct hostent *hp; 928 struct netent *np; 929 u_long val; 930 char *q; 931 int afamily; /* local copy of af so we can change it */ 932 933 if (af == 0) { 934 af = AF_INET; 935 aflen = sizeof(struct sockaddr_in); 936 } 937 afamily = af; 938 rtm_addrs |= which; 939 switch (which) { 940 case RTA_DST: 941 su = &so_dst; 942 break; 943 case RTA_GATEWAY: 944 su = &so_gate; 945 if (iflag) { 946 struct ifaddrs *ifap, *ifa; 947 struct sockaddr_dl *sdl = NULL; 948 949 if (getifaddrs(&ifap)) 950 err(1, "getifaddrs"); 951 952 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { 953 if (ifa->ifa_addr->sa_family != AF_LINK) 954 continue; 955 956 if (strcmp(str, ifa->ifa_name) != 0) 957 continue; 958 959 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 960 } 961 /* If we found it, then use it */ 962 if (sdl != NULL) { 963 /* 964 * Copy is safe since we have a 965 * sockaddr_storage member in sockunion{}. 966 * Note that we need to copy before calling 967 * freeifaddrs(). 968 * 969 * Interface routes are routed only by their 970 * sdl_index or interface name (we provide 971 * both here), not by the ARP address of the 972 * local interface (alen, slen = 0). 973 */ 974 memcpy(&su->sdl, sdl, sdl->sdl_len); 975 su->sdl.sdl_alen = 0; 976 su->sdl.sdl_slen = 0; 977 } 978 freeifaddrs(ifap); 979 if (sdl != NULL) 980 return(1); 981 } 982 break; 983 case RTA_NETMASK: 984 su = &so_mask; 985 break; 986 case RTA_GENMASK: 987 su = &so_genmask; 988 break; 989 case RTA_IFP: 990 su = &so_ifp; 991 afamily = AF_LINK; 992 break; 993 case RTA_IFA: 994 su = &so_ifa; 995 break; 996 default: 997 usage("internal error"); 998 /*NOTREACHED*/ 999 } 1000 su->sa.sa_len = aflen; 1001 su->sa.sa_family = afamily; /* cases that don't want it have left 1002 already */ 1003 if (strcmp(str, "default") == 0) { 1004 /* 1005 * Default is net 0.0.0.0/0 1006 */ 1007 switch (which) { 1008 case RTA_DST: 1009 forcenet++; 1010 /* bzero(su, sizeof(*su)); *//* for readability */ 1011 getaddr(RTA_NETMASK, str, 0); 1012 break; 1013 case RTA_NETMASK: 1014 case RTA_GENMASK: 1015 /* bzero(su, sizeof(*su)); *//* for readability */ 1016 break; 1017 } 1018 return(0); 1019 } 1020 switch (afamily) { 1021 #ifdef INET6 1022 case AF_INET6: 1023 { 1024 struct addrinfo hints, *res; 1025 1026 q = NULL; 1027 if (which == RTA_DST && (q = strchr(str, '/')) != NULL) 1028 *q = '\0'; 1029 memset(&hints, 0, sizeof(hints)); 1030 hints.ai_family = afamily; /*AF_INET6*/ 1031 hints.ai_flags = AI_NUMERICHOST; 1032 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1033 if (getaddrinfo(str, "0", &hints, &res) != 0 || 1034 res->ai_family != AF_INET6 || 1035 res->ai_addrlen != sizeof(su->sin6)) { 1036 fprintf(stderr, "%s: bad value\n", str); 1037 exit(1); 1038 } 1039 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1040 #ifdef __KAME__ 1041 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1042 IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) && 1043 su->sin6.sin6_scope_id) { 1044 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1045 htons(su->sin6.sin6_scope_id); 1046 su->sin6.sin6_scope_id = 0; 1047 } 1048 #endif 1049 freeaddrinfo(res); 1050 if (q != NULL) 1051 *q++ = '/'; 1052 if (which == RTA_DST) 1053 return(inet6_makenetandmask(&su->sin6, q)); 1054 return(0); 1055 } 1056 #endif /* INET6 */ 1057 1058 #ifdef NS 1059 case AF_NS: 1060 if (which == RTA_DST) { 1061 struct sockaddr_ns *sms = &(so_mask.sns); 1062 memset(sms, 0, sizeof(*sms)); 1063 sms->sns_family = 0; 1064 sms->sns_len = 6; 1065 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1066 rtm_addrs |= RTA_NETMASK; 1067 } 1068 su->sns.sns_addr = ns_addr(str); 1069 return(!ns_nullhost(su->sns.sns_addr)); 1070 #endif 1071 1072 1073 case AF_APPLETALK: 1074 if (!atalk_aton(str, &su->sat.sat_addr)) 1075 errx(EX_NOHOST, "bad address: %s", str); 1076 rtm_addrs |= RTA_NETMASK; 1077 return(forcehost || su->sat.sat_addr.s_node != 0); 1078 1079 case AF_LINK: 1080 link_addr(str, &su->sdl); 1081 return(1); 1082 1083 1084 case PF_ROUTE: 1085 su->sa.sa_len = sizeof(*su); 1086 sockaddr(str, &su->sa); 1087 return(1); 1088 1089 case AF_INET: 1090 default: 1091 break; 1092 } 1093 1094 if (hpp == NULL) 1095 hpp = &hp; 1096 *hpp = NULL; 1097 1098 q = strchr(str,'/'); 1099 if (q != NULL && which == RTA_DST) { 1100 *q = '\0'; 1101 if ((val = inet_network(str)) != INADDR_NONE) { 1102 inet_makenetandmask( 1103 val, &su->sin, strtoul(q+1, 0, 0)); 1104 return(0); 1105 } 1106 *q = '/'; 1107 } 1108 if ((which != RTA_DST || forcenet == 0) && 1109 inet_aton(str, &su->sin.sin_addr)) { 1110 val = su->sin.sin_addr.s_addr; 1111 if (which != RTA_DST || 1112 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1113 return(1); 1114 else { 1115 val = ntohl(val); 1116 goto netdone; 1117 } 1118 } 1119 if (which == RTA_DST && forcehost == 0 && 1120 ((val = inet_network(str)) != INADDR_NONE || 1121 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) { 1122 netdone: 1123 inet_makenetandmask(val, &su->sin, 0); 1124 return(0); 1125 } 1126 hp = gethostbyname(str); 1127 if (hp != NULL) { 1128 *hpp = hp; 1129 su->sin.sin_family = hp->h_addrtype; 1130 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1131 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr))); 1132 return(1); 1133 } 1134 errx(EX_NOHOST, "bad address: %s", str); 1135 } 1136 1137 static int 1138 prefixlen(const char *len_str) 1139 { 1140 int len = atoi(len_str), q, r; 1141 int max; 1142 char *p; 1143 1144 rtm_addrs |= RTA_NETMASK; 1145 switch (af) { 1146 #ifdef INET6 1147 case AF_INET6: 1148 max = 128; 1149 p = (char *)&so_mask.sin6.sin6_addr; 1150 break; 1151 #endif 1152 case AF_INET: 1153 max = 32; 1154 p = (char *)&so_mask.sin.sin_addr; 1155 break; 1156 default: 1157 fprintf(stderr, "prefixlen not supported in this af\n"); 1158 exit(1); 1159 /*NOTREACHED*/ 1160 } 1161 1162 if (len < 0 || max < len) { 1163 fprintf(stderr, "%s: bad value\n", len_str); 1164 exit(1); 1165 } 1166 1167 q = len >> 3; 1168 r = len & 7; 1169 so_mask.sa.sa_family = af; 1170 so_mask.sa.sa_len = aflen; 1171 memset((void *)p, 0, max / 8); 1172 if (q > 0) 1173 memset((void *)p, 0xff, q); 1174 if (r > 0) 1175 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1176 if (len == max) 1177 return(-1); 1178 else 1179 return(len); 1180 } 1181 1182 #ifdef NS 1183 short ns_nullh[] = {0,0,0}; 1184 1185 char * 1186 ns_print(struct sockaddr_ns *sns) 1187 { 1188 struct ns_addr work; 1189 union { union ns_net net_e; u_long long_e; } net; 1190 u_short port; 1191 static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25]; 1192 const char *host = ""; 1193 char *p; 1194 u_char *q; 1195 1196 work = sns->sns_addr; 1197 port = ntohs(work.x_port); 1198 work.x_port = 0; 1199 net.net_e = work.x_net; 1200 if (ns_nullhost(work) && net.long_e == 0) { 1201 if (port == 0) 1202 strncpy(mybuf, "*.*", sizeof(mybuf)); 1203 else 1204 sprintf(mybuf, "*.%XH", port); 1205 return(mybuf); 1206 } 1207 1208 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1209 host = "any"; 1210 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1211 host = "*"; 1212 else { 1213 q = work.x_host.c_host; 1214 sprintf(chost, "%02X%02X%02X%02X%02X%02XH", 1215 q[0], q[1], q[2], q[3], q[4], q[5]); 1216 for (p = chost; *p == '0' && p < chost + 12; p++) 1217 /* void */; 1218 host = p; 1219 } 1220 if (port != 0) 1221 sprintf(cport, ".%XH", htons(port)); 1222 else 1223 *cport = 0; 1224 1225 snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s", 1226 (unsigned long)ntohl(net.long_e), 1227 host, cport); 1228 return(mybuf); 1229 } 1230 #endif 1231 1232 static void 1233 interfaces(void) 1234 { 1235 size_t needed; 1236 int mib[6]; 1237 char *buf, *lim, *next; 1238 struct rt_msghdr *rtm; 1239 1240 mib[0] = CTL_NET; 1241 mib[1] = PF_ROUTE; 1242 mib[2] = 0; /* protocol */ 1243 mib[3] = 0; /* wildcard address family */ 1244 mib[4] = NET_RT_IFLIST; 1245 mib[5] = 0; /* no flags */ 1246 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1247 err(EX_OSERR, "route-sysctl-estimate"); 1248 if ((buf = malloc(needed)) == NULL) 1249 errx(EX_OSERR, "malloc failed"); 1250 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1251 err(EX_OSERR, "actual retrieval of interface table"); 1252 lim = buf + needed; 1253 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1254 rtm = (struct rt_msghdr *)next; 1255 print_rtmsg(rtm, rtm->rtm_msglen); 1256 } 1257 } 1258 1259 static void 1260 monitor(void) 1261 { 1262 int n; 1263 char msg[2048]; 1264 1265 verbose = 1; 1266 if (debugonly) { 1267 interfaces(); 1268 exit(0); 1269 } 1270 for (;;) { 1271 time_t now; 1272 n = read(s, msg, 2048); 1273 now = time(NULL); 1274 printf("\ngot message of size %d on %s", n, ctime(&now)); 1275 print_rtmsg((struct rt_msghdr *)msg, n); 1276 } 1277 } 1278 1279 struct { 1280 struct rt_msghdr m_rtm; 1281 char m_space[512]; 1282 } m_rtmsg; 1283 1284 static int 1285 rtmsg(int cmd, int flags) 1286 { 1287 static int seq; 1288 int rlen; 1289 char *cp = m_rtmsg.m_space; 1290 int l; 1291 1292 #define NEXTADDR(w, u) \ 1293 if (rtm_addrs & (w)) {\ 1294 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1295 if (verbose) sodump(&(u),"u");\ 1296 } 1297 1298 errno = 0; 1299 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1300 if (cmd == 'a') 1301 cmd = RTM_ADD; 1302 else if (cmd == 'c') 1303 cmd = RTM_CHANGE; 1304 else if (cmd == 'g') { 1305 cmd = RTM_GET; 1306 if (so_ifp.sa.sa_family == 0) { 1307 so_ifp.sa.sa_family = AF_LINK; 1308 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1309 rtm_addrs |= RTA_IFP; 1310 } 1311 } else 1312 cmd = RTM_DELETE; 1313 #define rtm m_rtmsg.m_rtm 1314 rtm.rtm_type = cmd; 1315 rtm.rtm_flags = flags; 1316 rtm.rtm_version = RTM_VERSION; 1317 rtm.rtm_seq = ++seq; 1318 rtm.rtm_addrs = rtm_addrs; 1319 rtm.rtm_rmx = rt_metrics; 1320 rtm.rtm_inits = rtm_inits; 1321 1322 if (rtm_addrs & RTA_NETMASK) 1323 mask_addr(); 1324 NEXTADDR(RTA_DST, so_dst); 1325 NEXTADDR(RTA_GATEWAY, so_gate); 1326 NEXTADDR(RTA_NETMASK, so_mask); 1327 NEXTADDR(RTA_GENMASK, so_genmask); 1328 NEXTADDR(RTA_IFP, so_ifp); 1329 NEXTADDR(RTA_IFA, so_ifa); 1330 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1331 if (verbose) 1332 print_rtmsg(&rtm, l); 1333 if (debugonly) 1334 return(0); 1335 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1336 warn("writing to routing socket"); 1337 return(-1); 1338 } 1339 if (cmd == RTM_GET) { 1340 do { 1341 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1342 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1343 if (l < 0) 1344 warn("read from routing socket"); 1345 else 1346 print_getmsg(&rtm, l); 1347 } 1348 #undef rtm 1349 return(0); 1350 } 1351 1352 static void 1353 mask_addr(void) 1354 { 1355 int olen = so_mask.sa.sa_len; 1356 char *cp1 = olen + (char *)&so_mask, *cp2; 1357 1358 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1359 if (*--cp1 != 0) { 1360 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1361 break; 1362 } 1363 if ((rtm_addrs & RTA_DST) == 0) 1364 return; 1365 switch (so_dst.sa.sa_family) { 1366 #ifdef NS 1367 case AF_NS: 1368 #endif 1369 case AF_INET: 1370 #ifdef INET6 1371 case AF_INET6: 1372 #endif 1373 case AF_APPLETALK: 1374 case 0: 1375 return; 1376 } 1377 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1378 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1379 while (cp2 > cp1) 1380 *--cp2 = 0; 1381 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1382 while (cp1 > so_dst.sa.sa_data) 1383 *--cp1 &= *--cp2; 1384 } 1385 1386 const char *msgtypes[] = { 1387 "", 1388 "RTM_ADD: Add Route", 1389 "RTM_DELETE: Delete Route", 1390 "RTM_CHANGE: Change Metrics or flags", 1391 "RTM_GET: Report Metrics", 1392 "RTM_LOSING: Kernel Suspects Partitioning", 1393 "RTM_REDIRECT: Told to use different route", 1394 "RTM_MISS: Lookup failed on this address", 1395 "RTM_LOCK: fix specified metrics", 1396 "RTM_OLDADD: caused by SIOCADDRT", 1397 "RTM_OLDDEL: caused by SIOCDELRT", 1398 "RTM_RESOLVE: Route created by cloning", 1399 "RTM_NEWADDR: address being added to iface", 1400 "RTM_DELADDR: address being removed from iface", 1401 "RTM_IFINFO: iface status change", 1402 "RTM_NEWMADDR: new multicast group membership on iface", 1403 "RTM_DELMADDR: multicast group membership removed from iface", 1404 "RTM_IFANNOUNCE: interface arrival/departure", 1405 0, 1406 }; 1407 1408 char metricnames[] = 1409 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount" 1410 "\1mtu"; 1411 char routeflags[] = 1412 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT" 1413 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016" 1414 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE" 1415 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST"; 1416 char ifnetflags[] = 1417 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1418 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1419 "\017LINK2\020MULTICAST"; 1420 char addrnames[] = 1421 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1422 1423 static void 1424 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused) 1425 { 1426 struct if_msghdr *ifm; 1427 struct ifa_msghdr *ifam; 1428 #ifdef RTM_NEWMADDR 1429 struct ifma_msghdr *ifmam; 1430 #endif 1431 struct if_announcemsghdr *ifan; 1432 1433 if (verbose == 0) 1434 return; 1435 if (rtm->rtm_version != RTM_VERSION) { 1436 printf("routing message version %d not understood\n", 1437 rtm->rtm_version); 1438 return; 1439 } 1440 if (msgtypes[rtm->rtm_type] != NULL) 1441 printf("%s: ", msgtypes[rtm->rtm_type]); 1442 else 1443 printf("#%d: ", rtm->rtm_type); 1444 printf("len %d, ", rtm->rtm_msglen); 1445 switch (rtm->rtm_type) { 1446 case RTM_IFINFO: 1447 ifm = (struct if_msghdr *)rtm; 1448 printf("if# %d, flags:", ifm->ifm_index); 1449 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1450 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1451 break; 1452 case RTM_NEWADDR: 1453 case RTM_DELADDR: 1454 ifam = (struct ifa_msghdr *)rtm; 1455 printf("metric %d, flags:", ifam->ifam_metric); 1456 bprintf(stdout, ifam->ifam_flags, routeflags); 1457 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1458 break; 1459 #ifdef RTM_NEWMADDR 1460 case RTM_NEWMADDR: 1461 case RTM_DELMADDR: 1462 ifmam = (struct ifma_msghdr *)rtm; 1463 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1464 break; 1465 #endif 1466 case RTM_IFANNOUNCE: 1467 ifan = (struct if_announcemsghdr *)rtm; 1468 printf("if# %d, what: ", ifan->ifan_index); 1469 switch (ifan->ifan_what) { 1470 case IFAN_ARRIVAL: 1471 printf("arrival"); 1472 break; 1473 case IFAN_DEPARTURE: 1474 printf("departure"); 1475 break; 1476 default: 1477 printf("#%d", ifan->ifan_what); 1478 break; 1479 } 1480 printf("\n"); 1481 break; 1482 1483 default: 1484 printf("pid: %ld, seq %d, errno %d, flags:", 1485 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1486 bprintf(stdout, rtm->rtm_flags, routeflags); 1487 pmsg_common(rtm); 1488 } 1489 } 1490 1491 static void 1492 print_getmsg(struct rt_msghdr *rtm, int msglen) 1493 { 1494 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1495 struct sockaddr_dl *ifp = NULL; 1496 struct sockaddr *sa; 1497 char *cp; 1498 int i; 1499 1500 printf(" route to: %s\n", routename(&so_dst.sa)); 1501 if (rtm->rtm_version != RTM_VERSION) { 1502 warnx("routing message version %d not understood", 1503 rtm->rtm_version); 1504 return; 1505 } 1506 if (rtm->rtm_msglen > msglen) { 1507 warnx("message length mismatch, in packet %d, returned %d", 1508 rtm->rtm_msglen, msglen); 1509 } 1510 if (rtm->rtm_errno != 0) { 1511 errno = rtm->rtm_errno; 1512 warn("message indicates error %d", errno); 1513 return; 1514 } 1515 cp = ((char *)(rtm + 1)); 1516 if (rtm->rtm_addrs) 1517 for (i = 1; i != 0; i <<= 1) 1518 if (i & rtm->rtm_addrs) { 1519 sa = (struct sockaddr *)cp; 1520 switch (i) { 1521 case RTA_DST: 1522 dst = sa; 1523 break; 1524 case RTA_GATEWAY: 1525 gate = sa; 1526 break; 1527 case RTA_NETMASK: 1528 mask = sa; 1529 break; 1530 case RTA_IFP: 1531 if (sa->sa_family == AF_LINK && 1532 ((struct sockaddr_dl *)sa)->sdl_nlen) 1533 ifp = (struct sockaddr_dl *)sa; 1534 break; 1535 } 1536 ADVANCE(cp, sa); 1537 } 1538 if (dst != NULL && mask != NULL) 1539 mask->sa_family = dst->sa_family; /* XXX */ 1540 if (dst != NULL) 1541 printf("destination: %s\n", routename(dst)); 1542 if (mask != NULL) { 1543 int savenflag = nflag; 1544 1545 nflag = 1; 1546 printf(" mask: %s\n", routename(mask)); 1547 nflag = savenflag; 1548 } 1549 if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY) 1550 printf(" gateway: %s\n", routename(gate)); 1551 if (ifp != NULL) 1552 printf(" interface: %.*s\n", 1553 ifp->sdl_nlen, ifp->sdl_data); 1554 printf(" flags: "); 1555 bprintf(stdout, rtm->rtm_flags, routeflags); 1556 1557 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1558 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1559 1560 printf("\n%s\n", "\ 1561 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1562 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1563 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1564 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1565 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1566 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1567 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1568 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1569 if (rtm->rtm_rmx.rmx_expire != 0) 1570 rtm->rtm_rmx.rmx_expire -= time(0); 1571 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1572 #undef lock 1573 #undef msec 1574 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1575 if (verbose) 1576 pmsg_common(rtm); 1577 else if (rtm->rtm_addrs &~ RTA_IGN) { 1578 printf("sockaddrs: "); 1579 bprintf(stdout, rtm->rtm_addrs, addrnames); 1580 putchar('\n'); 1581 } 1582 #undef RTA_IGN 1583 } 1584 1585 static void 1586 pmsg_common(struct rt_msghdr *rtm) 1587 { 1588 printf("\nlocks: "); 1589 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1590 printf(" inits: "); 1591 bprintf(stdout, rtm->rtm_inits, metricnames); 1592 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1593 } 1594 1595 static void 1596 pmsg_addrs(char *cp, int addrs) 1597 { 1598 struct sockaddr *sa; 1599 int i; 1600 1601 if (addrs == 0) { 1602 putchar('\n'); 1603 return; 1604 } 1605 printf("\nsockaddrs: "); 1606 bprintf(stdout, addrs, addrnames); 1607 putchar('\n'); 1608 for (i = 1; i != 0; i <<= 1) 1609 if (i & addrs) { 1610 sa = (struct sockaddr *)cp; 1611 printf(" %s", routename(sa)); 1612 ADVANCE(cp, sa); 1613 } 1614 putchar('\n'); 1615 fflush(stdout); 1616 } 1617 1618 static void 1619 bprintf(FILE *fp, int b, u_char *str) 1620 { 1621 int i; 1622 int gotsome = 0; 1623 1624 if (b == 0) 1625 return; 1626 while ((i = *str++) != 0) { 1627 if (b & (1 << (i-1))) { 1628 if (!gotsome) 1629 i = '<'; 1630 else 1631 i = ','; 1632 putc(i, fp); 1633 gotsome = 1; 1634 for (; (i = *str) > 32; str++) 1635 putc(i, fp); 1636 } else 1637 while (*str > 32) 1638 str++; 1639 } 1640 if (gotsome) 1641 putc('>', fp); 1642 } 1643 1644 int 1645 keyword(const char *cp) 1646 { 1647 struct keytab *kt = keywords; 1648 1649 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) 1650 kt++; 1651 return(kt->kt_i); 1652 } 1653 1654 static void 1655 sodump(sup su, const char *which) 1656 { 1657 switch (su->sa.sa_family) { 1658 case AF_LINK: 1659 printf("%s: link %s; ", 1660 which, link_ntoa(&su->sdl)); 1661 break; 1662 case AF_INET: 1663 printf("%s: inet %s; ", 1664 which, inet_ntoa(su->sin.sin_addr)); 1665 break; 1666 case AF_APPLETALK: 1667 printf("%s: atalk %s; ", 1668 which, atalk_ntoa(su->sat.sat_addr)); 1669 break; 1670 #ifdef NS 1671 case AF_NS: 1672 printf("%s: xns %s; ", 1673 which, ns_ntoa(su->sns.sns_addr)); 1674 break; 1675 #endif 1676 } 1677 fflush(stdout); 1678 } 1679 1680 /* States*/ 1681 #define VIRGIN 0 1682 #define GOTONE 1 1683 #define GOTTWO 2 1684 /* Inputs */ 1685 #define DIGIT (4*0) 1686 #define END (4*1) 1687 #define DELIM (4*2) 1688 1689 static void 1690 sockaddr(char *addr, struct sockaddr *sa) 1691 { 1692 char *cp = (char *)sa; 1693 int size = sa->sa_len; 1694 char *cplim = cp + size; 1695 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1696 1697 memset(cp, 0, size); 1698 cp++; 1699 do { 1700 if ((*addr >= '0') && (*addr <= '9')) { 1701 new = *addr - '0'; 1702 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1703 new = *addr - 'a' + 10; 1704 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1705 new = *addr - 'A' + 10; 1706 } else if (*addr == '\0') 1707 state |= END; 1708 else 1709 state |= DELIM; 1710 addr++; 1711 switch (state /* | INPUT */) { 1712 case GOTTWO | DIGIT: 1713 *cp++ = byte; /*FALLTHROUGH*/ 1714 case VIRGIN | DIGIT: 1715 state = GOTONE; byte = new; continue; 1716 case GOTONE | DIGIT: 1717 state = GOTTWO; byte = new + (byte << 4); continue; 1718 default: /* | DELIM */ 1719 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1720 case GOTONE | END: 1721 case GOTTWO | END: 1722 *cp++ = byte; /* FALLTHROUGH */ 1723 case VIRGIN | END: 1724 break; 1725 } 1726 break; 1727 } while (cp < cplim); 1728 sa->sa_len = cp - (char *)sa; 1729 } 1730 1731 static int 1732 atalk_aton(const char *text, struct at_addr *addr) 1733 { 1734 u_int net, node; 1735 1736 if (sscanf(text, "%u.%u", &net, &node) != 2 1737 || net > 0xffff || node > 0xff) 1738 return(0); 1739 addr->s_net = htons(net); 1740 addr->s_node = node; 1741 return(1); 1742 } 1743 1744 static char * 1745 atalk_ntoa(struct at_addr at) 1746 { 1747 static char buf[20]; 1748 1749 snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1750 return(buf); 1751 } 1752