route.c revision 196527
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#ifndef lint 37#if 0 38static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 39#endif 40#endif /* not lint */ 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: head/sbin/route/route.c 196527 2009-08-25 04:09:09Z charnier $"); 44 45#include <sys/param.h> 46#include <sys/file.h> 47#include <sys/socket.h> 48#include <sys/ioctl.h> 49#include <sys/sysctl.h> 50#include <sys/types.h> 51 52#include <net/if.h> 53#include <net/route.h> 54#include <net/if_dl.h> 55#include <netinet/in.h> 56#include <netinet/if_ether.h> 57#include <netatalk/at.h> 58#include <arpa/inet.h> 59#include <netdb.h> 60 61#include <ctype.h> 62#include <err.h> 63#include <errno.h> 64#include <paths.h> 65#include <stdio.h> 66#include <stdlib.h> 67#include <string.h> 68#include <sysexits.h> 69#include <unistd.h> 70#include <ifaddrs.h> 71 72struct keytab { 73 char *kt_cp; 74 int kt_i; 75} keywords[] = { 76#include "keywords.h" 77 {0, 0} 78}; 79 80struct ortentry route; 81union sockunion { 82 struct sockaddr sa; 83 struct sockaddr_in sin; 84#ifdef INET6 85 struct sockaddr_in6 sin6; 86#endif 87 struct sockaddr_at sat; 88 struct sockaddr_dl sdl; 89 struct sockaddr_inarp sinarp; 90 struct sockaddr_storage ss; /* added to avoid memory overrun */ 91} so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 92 93typedef union sockunion *sup; 94int pid, rtm_addrs; 95int s; 96int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 97int iflag, verbose, aflen = sizeof (struct sockaddr_in); 98int locking, lockrest, debugonly; 99struct rt_metrics rt_metrics; 100u_long rtm_inits; 101uid_t uid; 102 103int atalk_aton(const char *, struct at_addr *); 104char *atalk_ntoa(struct at_addr); 105void bprintf(FILE *, int, u_char *); 106void flushroutes(int argc, char *argv[]); 107int getaddr(int, char *, struct hostent **); 108int keyword(char *); 109void inet_makenetandmask(u_long, struct sockaddr_in *, u_long); 110#ifdef INET6 111static int inet6_makenetandmask(struct sockaddr_in6 *, char *); 112#endif 113void interfaces(void); 114void mask_addr(void); 115void monitor(void); 116const char *netname(struct sockaddr *); 117void newroute(int, char **); 118void pmsg_addrs(char *, int); 119void pmsg_common(struct rt_msghdr *); 120int prefixlen(char *); 121void print_getmsg(struct rt_msghdr *, int); 122void print_rtmsg(struct rt_msghdr *, int); 123const char *routename(struct sockaddr *); 124int rtmsg(int, int); 125void set_metric(char *, int); 126void sockaddr(char *, struct sockaddr *); 127void sodump(sup, char *); 128extern char *iso_ntoa(); 129 130void usage(const char *) __dead2; 131 132void 133usage(const char *cp) 134{ 135 if (cp) 136 warnx("bad keyword: %s", cp); 137 (void) fprintf(stderr, 138 "usage: route [-dnqtv] command [[modifiers] args]\n"); 139 exit(EX_USAGE); 140 /* NOTREACHED */ 141} 142 143int 144main(int argc, char **argv) 145{ 146 int ch; 147 148 if (argc < 2) 149 usage((char *)NULL); 150 151 while ((ch = getopt(argc, argv, "nqdtv")) != -1) 152 switch(ch) { 153 case 'n': 154 nflag = 1; 155 break; 156 case 'q': 157 qflag = 1; 158 break; 159 case 'v': 160 verbose = 1; 161 break; 162 case 't': 163 tflag = 1; 164 break; 165 case 'd': 166 debugonly = 1; 167 break; 168 case '?': 169 default: 170 usage((char *)NULL); 171 } 172 argc -= optind; 173 argv += optind; 174 175 pid = getpid(); 176 uid = geteuid(); 177 if (tflag) 178 s = open(_PATH_DEVNULL, O_WRONLY, 0); 179 else 180 s = socket(PF_ROUTE, SOCK_RAW, 0); 181 if (s < 0) 182 err(EX_OSERR, "socket"); 183 if (*argv) 184 switch (keyword(*argv)) { 185 case K_GET: 186 case K_SHOW: 187 uid = 0; 188 /* FALLTHROUGH */ 189 190 case K_CHANGE: 191 case K_ADD: 192 case K_DEL: 193 case K_DELETE: 194 newroute(argc, argv); 195 /* NOTREACHED */ 196 197 case K_MONITOR: 198 monitor(); 199 /* NOTREACHED */ 200 201 case K_FLUSH: 202 flushroutes(argc, argv); 203 exit(0); 204 /* NOTREACHED */ 205 } 206 usage(*argv); 207 /* NOTREACHED */ 208} 209 210/* 211 * Purge all entries in the routing tables not 212 * associated with network interfaces. 213 */ 214void 215flushroutes(int argc, char *argv[]) 216{ 217 size_t needed; 218 int mib[6], rlen, seqno, count = 0; 219 char *buf, *next, *lim; 220 struct rt_msghdr *rtm; 221 222 if (uid && !debugonly) { 223 errx(EX_NOPERM, "must be root to alter routing table"); 224 } 225 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 226 if (argc > 1) { 227 argv++; 228 if (argc == 2 && **argv == '-') 229 switch (keyword(*argv + 1)) { 230 case K_INET: 231 af = AF_INET; 232 break; 233#ifdef INET6 234 case K_INET6: 235 af = AF_INET6; 236 break; 237#endif 238 case K_ATALK: 239 af = AF_APPLETALK; 240 break; 241 case K_LINK: 242 af = AF_LINK; 243 break; 244 default: 245 goto bad; 246 } else 247bad: usage(*argv); 248 } 249retry: 250 mib[0] = CTL_NET; 251 mib[1] = PF_ROUTE; 252 mib[2] = 0; /* protocol */ 253 mib[3] = 0; /* wildcard address family */ 254 mib[4] = NET_RT_DUMP; 255 mib[5] = 0; /* no flags */ 256 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 257 err(EX_OSERR, "route-sysctl-estimate"); 258 if ((buf = malloc(needed)) == NULL) 259 errx(EX_OSERR, "malloc failed"); 260 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 261 if (errno == ENOMEM && count++ < 10) { 262 warnx("Routing table grew, retrying"); 263 sleep(1); 264 free(buf); 265 goto retry; 266 } 267 err(EX_OSERR, "route-sysctl-get"); 268 } 269 lim = buf + needed; 270 if (verbose) 271 (void) 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) { 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 < 0 && errno == EPERM) 291 err(1, "write to routing socket"); 292 if (rlen < (int)rtm->rtm_msglen) { 293 warn("write to routing socket"); 294 (void) printf("got only %d for rlen\n", rlen); 295 free(buf); 296 goto retry; 297 break; 298 } 299 seqno++; 300 if (qflag) 301 continue; 302 if (verbose) 303 print_rtmsg(rtm, rlen); 304 else { 305 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 306 (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? 307 routename(sa) : netname(sa)); 308 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); 309 (void) printf("%-20.20s ", routename(sa)); 310 (void) printf("done\n"); 311 } 312 } 313} 314 315const char * 316routename(struct sockaddr *sa) 317{ 318 char *cp; 319 static char line[MAXHOSTNAMELEN + 1]; 320 struct hostent *hp; 321 static char domain[MAXHOSTNAMELEN + 1]; 322 static int first = 1, n; 323 324 if (first) { 325 first = 0; 326 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 327 (cp = strchr(domain, '.'))) { 328 domain[MAXHOSTNAMELEN] = '\0'; 329 (void) strcpy(domain, cp + 1); 330 } else 331 domain[0] = 0; 332 } 333 334 if (sa->sa_len == 0) 335 strcpy(line, "default"); 336 else switch (sa->sa_family) { 337 338 case AF_INET: 339 { struct in_addr in; 340 in = ((struct sockaddr_in *)sa)->sin_addr; 341 342 cp = 0; 343 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) 344 cp = "default"; 345 if (cp == 0 && !nflag) { 346 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 347 AF_INET); 348 if (hp) { 349 if ((cp = strchr(hp->h_name, '.')) && 350 !strcmp(cp + 1, domain)) 351 *cp = 0; 352 cp = hp->h_name; 353 } 354 } 355 if (cp) { 356 strncpy(line, cp, sizeof(line) - 1); 357 line[sizeof(line) - 1] = '\0'; 358 } else 359 (void) sprintf(line, "%s", inet_ntoa(in)); 360 break; 361 } 362 363#ifdef INET6 364 case AF_INET6: 365 { 366 struct sockaddr_in6 sin6; /* use static var for safety */ 367 int niflags = 0; 368 369 memset(&sin6, 0, sizeof(sin6)); 370 memcpy(&sin6, sa, sa->sa_len); 371 sin6.sin6_len = sizeof(struct sockaddr_in6); 372 sin6.sin6_family = AF_INET6; 373#ifdef __KAME__ 374 if (sa->sa_len == sizeof(struct sockaddr_in6) && 375 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 376 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 377 sin6.sin6_scope_id == 0) { 378 sin6.sin6_scope_id = 379 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 380 sin6.sin6_addr.s6_addr[2] = 0; 381 sin6.sin6_addr.s6_addr[3] = 0; 382 } 383#endif 384 if (nflag) 385 niflags |= NI_NUMERICHOST; 386 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 387 line, sizeof(line), NULL, 0, niflags) != 0) 388 strncpy(line, "invalid", sizeof(line)); 389 390 return(line); 391 } 392#endif 393 394 case AF_APPLETALK: 395 (void) snprintf(line, sizeof(line), "atalk %s", 396 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 397 break; 398 399 case AF_LINK: 400 return (link_ntoa((struct sockaddr_dl *)sa)); 401 402 default: 403 { u_short *s = (u_short *)sa; 404 u_short *slim = s + ((sa->sa_len + 1) >> 1); 405 char *cp = line + sprintf(line, "(%d)", sa->sa_family); 406 char *cpe = line + sizeof(line); 407 408 while (++s < slim && cp < cpe) /* start with sa->sa_data */ 409 if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0) 410 cp += n; 411 else 412 *cp = '\0'; 413 break; 414 } 415 } 416 return (line); 417} 418 419/* 420 * Return the name of the network whose address is given. 421 * The address is assumed to be that of a net or subnet, not a host. 422 */ 423const char * 424netname(struct sockaddr *sa) 425{ 426 char *cp = 0; 427 static char line[MAXHOSTNAMELEN + 1]; 428 struct netent *np = 0; 429 u_long net, mask; 430 u_long i; 431 int n, subnetshift; 432 433 switch (sa->sa_family) { 434 435 case AF_INET: 436 { struct in_addr in; 437 in = ((struct sockaddr_in *)sa)->sin_addr; 438 439 i = in.s_addr = ntohl(in.s_addr); 440 if (in.s_addr == 0) 441 cp = "default"; 442 else if (!nflag) { 443 if (IN_CLASSA(i)) { 444 mask = IN_CLASSA_NET; 445 subnetshift = 8; 446 } else if (IN_CLASSB(i)) { 447 mask = IN_CLASSB_NET; 448 subnetshift = 8; 449 } else { 450 mask = IN_CLASSC_NET; 451 subnetshift = 4; 452 } 453 /* 454 * If there are more bits than the standard mask 455 * would suggest, subnets must be in use. 456 * Guess at the subnet mask, assuming reasonable 457 * width subnet fields. 458 */ 459 while (in.s_addr &~ mask) 460 mask = (long)mask >> subnetshift; 461 net = in.s_addr & mask; 462 while ((mask & 1) == 0) 463 mask >>= 1, net >>= 1; 464 np = getnetbyaddr(net, AF_INET); 465 if (np) 466 cp = np->n_name; 467 } 468#define C(x) (unsigned)((x) & 0xff) 469 if (cp) 470 strncpy(line, cp, sizeof(line)); 471 else if ((in.s_addr & 0xffffff) == 0) 472 (void) sprintf(line, "%u", C(in.s_addr >> 24)); 473 else if ((in.s_addr & 0xffff) == 0) 474 (void) sprintf(line, "%u.%u", C(in.s_addr >> 24), 475 C(in.s_addr >> 16)); 476 else if ((in.s_addr & 0xff) == 0) 477 (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), 478 C(in.s_addr >> 16), C(in.s_addr >> 8)); 479 else 480 (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), 481 C(in.s_addr >> 16), C(in.s_addr >> 8), 482 C(in.s_addr)); 483#undef C 484 break; 485 } 486 487#ifdef INET6 488 case AF_INET6: 489 { 490 struct sockaddr_in6 sin6; /* use static var for safety */ 491 int niflags = 0; 492 493 memset(&sin6, 0, sizeof(sin6)); 494 memcpy(&sin6, sa, sa->sa_len); 495 sin6.sin6_len = sizeof(struct sockaddr_in6); 496 sin6.sin6_family = AF_INET6; 497#ifdef __KAME__ 498 if (sa->sa_len == sizeof(struct sockaddr_in6) && 499 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 500 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 501 sin6.sin6_scope_id == 0) { 502 sin6.sin6_scope_id = 503 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 504 sin6.sin6_addr.s6_addr[2] = 0; 505 sin6.sin6_addr.s6_addr[3] = 0; 506 } 507#endif 508 if (nflag) 509 niflags |= NI_NUMERICHOST; 510 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 511 line, sizeof(line), NULL, 0, niflags) != 0) 512 strncpy(line, "invalid", sizeof(line)); 513 514 return(line); 515 } 516#endif 517 518 case AF_APPLETALK: 519 (void) snprintf(line, sizeof(line), "atalk %s", 520 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr)); 521 break; 522 523 case AF_LINK: 524 return (link_ntoa((struct sockaddr_dl *)sa)); 525 526 527 default: 528 { u_short *s = (u_short *)sa->sa_data; 529 u_short *slim = s + ((sa->sa_len + 1)>>1); 530 char *cp = line + sprintf(line, "af %d:", sa->sa_family); 531 char *cpe = line + sizeof(line); 532 533 while (s < slim && cp < cpe) 534 if ((n = snprintf(cp, cpe - cp, " %x", *s++)) > 0) 535 cp += n; 536 else 537 *cp = '\0'; 538 break; 539 } 540 } 541 return (line); 542} 543 544void 545set_metric(char *value, int key) 546{ 547 int flag = 0; 548 u_long noval, *valp = &noval; 549 550 switch (key) { 551#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 552 caseof(K_MTU, RTV_MTU, rmx_mtu); 553 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 554 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 555 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 556 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 557 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 558 caseof(K_RTT, RTV_RTT, rmx_rtt); 559 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 560 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); 561 } 562 rtm_inits |= flag; 563 if (lockrest || locking) 564 rt_metrics.rmx_locks |= flag; 565 if (locking) 566 locking = 0; 567 *valp = atoi(value); 568} 569 570void 571newroute(int argc, char **argv) 572{ 573 char *cmd, *dest = "", *gateway = "", *errmsg; 574 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC; 575 int key; 576 struct hostent *hp = 0; 577 578 if (uid) { 579 errx(EX_NOPERM, "must be root to alter routing table"); 580 } 581 cmd = argv[0]; 582 if (*cmd != 'g' && *cmd != 's') 583 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 584 585 while (--argc > 0) { 586 if (**(++argv)== '-') { 587 switch (key = keyword(1 + *argv)) { 588 case K_LINK: 589 af = AF_LINK; 590 aflen = sizeof(struct sockaddr_dl); 591 break; 592 case K_INET: 593 af = AF_INET; 594 aflen = sizeof(struct sockaddr_in); 595 break; 596#ifdef INET6 597 case K_INET6: 598 af = AF_INET6; 599 aflen = sizeof(struct sockaddr_in6); 600 break; 601#endif 602 case K_ATALK: 603 af = AF_APPLETALK; 604 aflen = sizeof(struct sockaddr_at); 605 break; 606 case K_SA: 607 af = PF_ROUTE; 608 aflen = sizeof(union sockunion); 609 break; 610 case K_IFACE: 611 case K_INTERFACE: 612 iflag++; 613 break; 614 case K_NOSTATIC: 615 flags &= ~RTF_STATIC; 616 break; 617 case K_LOCK: 618 locking = 1; 619 break; 620 case K_LOCKREST: 621 lockrest = 1; 622 break; 623 case K_HOST: 624 forcehost++; 625 break; 626 case K_REJECT: 627 flags |= RTF_REJECT; 628 break; 629 case K_BLACKHOLE: 630 flags |= RTF_BLACKHOLE; 631 break; 632 case K_PROTO1: 633 flags |= RTF_PROTO1; 634 break; 635 case K_PROTO2: 636 flags |= RTF_PROTO2; 637 break; 638 case K_PROXY: 639 proxy = 1; 640 break; 641 case K_XRESOLVE: 642 flags |= RTF_XRESOLVE; 643 break; 644 case K_STATIC: 645 flags |= RTF_STATIC; 646 break; 647 case K_STICKY: 648 flags |= RTF_STICKY; 649 break; 650 case K_NOSTICK: 651 flags &= ~RTF_STICKY; 652 break; 653 case K_IFA: 654 if (!--argc) 655 usage((char *)NULL); 656 (void) getaddr(RTA_IFA, *++argv, 0); 657 break; 658 case K_IFP: 659 if (!--argc) 660 usage((char *)NULL); 661 (void) getaddr(RTA_IFP, *++argv, 0); 662 break; 663 case K_GENMASK: 664 if (!--argc) 665 usage((char *)NULL); 666 (void) getaddr(RTA_GENMASK, *++argv, 0); 667 break; 668 case K_GATEWAY: 669 if (!--argc) 670 usage((char *)NULL); 671 (void) getaddr(RTA_GATEWAY, *++argv, 0); 672 break; 673 case K_DST: 674 if (!--argc) 675 usage((char *)NULL); 676 ishost = getaddr(RTA_DST, *++argv, &hp); 677 dest = *argv; 678 break; 679 case K_NETMASK: 680 if (!--argc) 681 usage((char *)NULL); 682 (void) getaddr(RTA_NETMASK, *++argv, 0); 683 /* FALLTHROUGH */ 684 case K_NET: 685 forcenet++; 686 break; 687 case K_PREFIXLEN: 688 if (!--argc) 689 usage((char *)NULL); 690 if (prefixlen(*++argv) == -1) { 691 forcenet = 0; 692 ishost = 1; 693 } else { 694 forcenet = 1; 695 ishost = 0; 696 } 697 break; 698 case K_MTU: 699 case K_HOPCOUNT: 700 case K_EXPIRE: 701 case K_RECVPIPE: 702 case K_SENDPIPE: 703 case K_SSTHRESH: 704 case K_RTT: 705 case K_RTTVAR: 706 case K_WEIGHT: 707 if (!--argc) 708 usage((char *)NULL); 709 set_metric(*++argv, key); 710 break; 711 default: 712 usage(1+*argv); 713 } 714 } else { 715 if ((rtm_addrs & RTA_DST) == 0) { 716 dest = *argv; 717 ishost = getaddr(RTA_DST, *argv, &hp); 718 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 719 gateway = *argv; 720 (void) getaddr(RTA_GATEWAY, *argv, &hp); 721 } else { 722 (void) getaddr(RTA_NETMASK, *argv, 0); 723 forcenet = 1; 724 } 725 } 726 } 727 if (forcehost) { 728 ishost = 1; 729#ifdef INET6 730 if (af == AF_INET6) { 731 rtm_addrs &= ~RTA_NETMASK; 732 memset((void *)&so_mask, 0, sizeof(so_mask)); 733 } 734#endif 735 } 736 if (forcenet) 737 ishost = 0; 738 flags |= RTF_UP; 739 if (ishost) 740 flags |= RTF_HOST; 741 if (iflag == 0) 742 flags |= RTF_GATEWAY; 743 if (proxy) { 744 so_dst.sinarp.sin_other = SIN_PROXY; 745 flags |= RTF_ANNOUNCE; 746 } 747 for (attempts = 1; ; attempts++) { 748 errno = 0; 749 if ((ret = rtmsg(*cmd, flags)) == 0) 750 break; 751 if (errno != ENETUNREACH && errno != ESRCH) 752 break; 753 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 754 hp->h_addr_list++; 755 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 756 MIN(hp->h_length, sizeof(so_gate.sin.sin_addr))); 757 } else 758 break; 759 } 760 if (*cmd == 'g' || *cmd == 's') 761 exit(ret != 0); 762 if (!qflag) { 763 oerrno = errno; 764 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 765 if (*gateway) { 766 (void) printf(": gateway %s", gateway); 767 if (attempts > 1 && ret == 0 && af == AF_INET) 768 (void) printf(" (%s)", 769 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); 770 } 771 if (ret == 0) { 772 (void) printf("\n"); 773 } else { 774 switch (oerrno) { 775 case ESRCH: 776 errmsg = "not in table"; 777 break; 778 case EBUSY: 779 errmsg = "entry in use"; 780 break; 781 case ENOBUFS: 782 errmsg = "not enough memory"; 783 break; 784 case EADDRINUSE: 785 /* handle recursion avoidance in rt_setgate() */ 786 errmsg = "gateway uses the same route"; 787 break; 788 case EEXIST: 789 errmsg = "route already in table"; 790 break; 791 default: 792 errmsg = strerror(oerrno); 793 break; 794 } 795 (void) printf(": %s\n", errmsg); 796 } 797 } 798 exit(ret != 0); 799} 800 801void 802inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits) 803{ 804 u_long addr, mask = 0; 805 char *cp; 806 807 rtm_addrs |= RTA_NETMASK; 808 /* 809 * XXX: This approach unable to handle 0.0.0.1/32 correctly 810 * as inet_network() converts 0.0.0.1 and 1 equally. 811 */ 812 if (net <= 0xff) 813 addr = net << IN_CLASSA_NSHIFT; 814 else if (net <= 0xffff) 815 addr = net << IN_CLASSB_NSHIFT; 816 else if (net <= 0xffffff) 817 addr = net << IN_CLASSC_NSHIFT; 818 else 819 addr = net; 820 /* 821 * If no /xx was specified we must cacluate the 822 * CIDR address. 823 */ 824 if ((bits == 0) && (addr != 0)) { 825 u_long i, j; 826 for(i=0,j=0xff; i<4; i++) { 827 if (addr & j) { 828 break; 829 } 830 j <<= 8; 831 } 832 /* i holds the first non zero bit */ 833 bits = 32 - (i*8); 834 } 835 if (bits != 0) 836 mask = 0xffffffff << (32 - bits); 837 838 sin->sin_addr.s_addr = htonl(addr); 839 sin = &so_mask.sin; 840 sin->sin_addr.s_addr = htonl(mask); 841 sin->sin_len = 0; 842 sin->sin_family = 0; 843 cp = (char *)(&sin->sin_addr + 1); 844 while (*--cp == 0 && cp > (char *)sin) 845 ; 846 sin->sin_len = 1 + cp - (char *)sin; 847} 848 849#ifdef INET6 850/* 851 * XXX the function may need more improvement... 852 */ 853static int 854inet6_makenetandmask(struct sockaddr_in6 *sin6, char *plen) 855{ 856 struct in6_addr in6; 857 858 if (!plen) { 859 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 860 sin6->sin6_scope_id == 0) { 861 plen = "0"; 862 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 863 /* aggregatable global unicast - RFC2374 */ 864 memset(&in6, 0, sizeof(in6)); 865 if (!memcmp(&sin6->sin6_addr.s6_addr[8], 866 &in6.s6_addr[8], 8)) 867 plen = "64"; 868 } 869 } 870 871 if (!plen || strcmp(plen, "128") == 0) 872 return 1; 873 rtm_addrs |= RTA_NETMASK; 874 (void)prefixlen(plen); 875 return 0; 876} 877#endif 878 879/* 880 * Interpret an argument as a network address of some kind, 881 * returning 1 if a host address, 0 if a network address. 882 */ 883int 884getaddr(int which, char *s, struct hostent **hpp) 885{ 886 sup su; 887 struct hostent *hp; 888 struct netent *np; 889 u_long val; 890 char *q; 891 int afamily; /* local copy of af so we can change it */ 892 893 if (af == 0) { 894 af = AF_INET; 895 aflen = sizeof(struct sockaddr_in); 896 } 897 afamily = af; 898 rtm_addrs |= which; 899 switch (which) { 900 case RTA_DST: 901 su = &so_dst; 902 break; 903 case RTA_GATEWAY: 904 su = &so_gate; 905 if (iflag) { 906 struct ifaddrs *ifap, *ifa; 907 struct sockaddr_dl *sdl = NULL; 908 909 if (getifaddrs(&ifap)) 910 err(1, "getifaddrs"); 911 912 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 913 if (ifa->ifa_addr->sa_family != AF_LINK) 914 continue; 915 916 if (strcmp(s, ifa->ifa_name)) 917 continue; 918 919 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 920 } 921 /* If we found it, then use it */ 922 if (sdl) { 923 /* 924 * Copy is safe since we have a 925 * sockaddr_storage member in sockunion{}. 926 * Note that we need to copy before calling 927 * freeifaddrs(). 928 */ 929 memcpy(&su->sdl, sdl, sdl->sdl_len); 930 } 931 freeifaddrs(ifap); 932 if (sdl) 933 return(1); 934 } 935 break; 936 case RTA_NETMASK: 937 su = &so_mask; 938 break; 939 case RTA_GENMASK: 940 su = &so_genmask; 941 break; 942 case RTA_IFP: 943 su = &so_ifp; 944 afamily = AF_LINK; 945 break; 946 case RTA_IFA: 947 su = &so_ifa; 948 break; 949 default: 950 usage("internal error"); 951 /*NOTREACHED*/ 952 } 953 su->sa.sa_len = aflen; 954 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 955 if (strcmp(s, "default") == 0) { 956 /* 957 * Default is net 0.0.0.0/0 958 */ 959 switch (which) { 960 case RTA_DST: 961 forcenet++; 962#if 0 963 bzero(su, sizeof(*su)); /* for readability */ 964#endif 965 (void) getaddr(RTA_NETMASK, s, 0); 966 break; 967#if 0 968 case RTA_NETMASK: 969 case RTA_GENMASK: 970 bzero(su, sizeof(*su)); /* for readability */ 971#endif 972 } 973 return (0); 974 } 975 switch (afamily) { 976#ifdef INET6 977 case AF_INET6: 978 { 979 struct addrinfo hints, *res; 980 int ecode; 981 982 q = NULL; 983 if (which == RTA_DST && (q = strchr(s, '/')) != NULL) 984 *q = '\0'; 985 memset(&hints, 0, sizeof(hints)); 986 hints.ai_family = afamily; /*AF_INET6*/ 987 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 988 ecode = getaddrinfo(s, NULL, &hints, &res); 989 if (ecode != 0 || res->ai_family != AF_INET6 || 990 res->ai_addrlen != sizeof(su->sin6)) { 991 (void) fprintf(stderr, "%s: %s\n", s, 992 gai_strerror(ecode)); 993 exit(1); 994 } 995 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 996#ifdef __KAME__ 997 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 998 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 999 su->sin6.sin6_scope_id) { 1000 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1001 htons(su->sin6.sin6_scope_id); 1002 su->sin6.sin6_scope_id = 0; 1003 } 1004#endif 1005 freeaddrinfo(res); 1006 if (q != NULL) 1007 *q++ = '/'; 1008 if (which == RTA_DST) 1009 return (inet6_makenetandmask(&su->sin6, q)); 1010 return (0); 1011 } 1012#endif /* INET6 */ 1013 1014 case AF_APPLETALK: 1015 if (!atalk_aton(s, &su->sat.sat_addr)) 1016 errx(EX_NOHOST, "bad address: %s", s); 1017 rtm_addrs |= RTA_NETMASK; 1018 return(forcehost || su->sat.sat_addr.s_node != 0); 1019 1020 case AF_LINK: 1021 link_addr(s, &su->sdl); 1022 return (1); 1023 1024 1025 case PF_ROUTE: 1026 su->sa.sa_len = sizeof(*su); 1027 sockaddr(s, &su->sa); 1028 return (1); 1029 1030 case AF_INET: 1031 default: 1032 break; 1033 } 1034 1035 if (hpp == NULL) 1036 hpp = &hp; 1037 *hpp = NULL; 1038 1039 q = strchr(s,'/'); 1040 if (q && which == RTA_DST) { 1041 *q = '\0'; 1042 if ((val = inet_network(s)) != INADDR_NONE) { 1043 inet_makenetandmask( 1044 val, &su->sin, strtoul(q+1, 0, 0)); 1045 return (0); 1046 } 1047 *q = '/'; 1048 } 1049 if ((which != RTA_DST || forcenet == 0) && 1050 inet_aton(s, &su->sin.sin_addr)) { 1051 val = su->sin.sin_addr.s_addr; 1052 if (which != RTA_DST || forcehost || 1053 inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1054 return (1); 1055 else { 1056 val = ntohl(val); 1057 goto netdone; 1058 } 1059 } 1060 if (which == RTA_DST && forcehost == 0 && 1061 ((val = inet_network(s)) != INADDR_NONE || 1062 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) { 1063netdone: 1064 inet_makenetandmask(val, &su->sin, 0); 1065 return (0); 1066 } 1067 hp = gethostbyname(s); 1068 if (hp) { 1069 *hpp = hp; 1070 su->sin.sin_family = hp->h_addrtype; 1071 memmove((char *)&su->sin.sin_addr, hp->h_addr, 1072 MIN(hp->h_length, sizeof(su->sin.sin_addr))); 1073 return (1); 1074 } 1075 errx(EX_NOHOST, "bad address: %s", s); 1076} 1077 1078int 1079prefixlen(char *s) 1080{ 1081 int len = atoi(s), q, r; 1082 int max; 1083 char *p; 1084 1085 rtm_addrs |= RTA_NETMASK; 1086 switch (af) { 1087#ifdef INET6 1088 case AF_INET6: 1089 max = 128; 1090 p = (char *)&so_mask.sin6.sin6_addr; 1091 break; 1092#endif 1093 case AF_INET: 1094 max = 32; 1095 p = (char *)&so_mask.sin.sin_addr; 1096 break; 1097 default: 1098 (void) fprintf(stderr, "prefixlen not supported in this af\n"); 1099 exit(1); 1100 /*NOTREACHED*/ 1101 } 1102 1103 if (len < 0 || max < len) { 1104 (void) fprintf(stderr, "%s: bad value\n", s); 1105 exit(1); 1106 } 1107 1108 q = len >> 3; 1109 r = len & 7; 1110 so_mask.sa.sa_family = af; 1111 so_mask.sa.sa_len = aflen; 1112 memset((void *)p, 0, max / 8); 1113 if (q > 0) 1114 memset((void *)p, 0xff, q); 1115 if (r > 0) 1116 *((u_char *)p + q) = (0xff00 >> r) & 0xff; 1117 if (len == max) 1118 return -1; 1119 else 1120 return len; 1121} 1122 1123void 1124interfaces(void) 1125{ 1126 size_t needed; 1127 int mib[6]; 1128 char *buf, *lim, *next, count = 0; 1129 struct rt_msghdr *rtm; 1130 1131retry2: 1132 mib[0] = CTL_NET; 1133 mib[1] = PF_ROUTE; 1134 mib[2] = 0; /* protocol */ 1135 mib[3] = 0; /* wildcard address family */ 1136 mib[4] = NET_RT_IFLIST; 1137 mib[5] = 0; /* no flags */ 1138 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1139 err(EX_OSERR, "route-sysctl-estimate"); 1140 if ((buf = malloc(needed)) == NULL) 1141 errx(EX_OSERR, "malloc failed"); 1142 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 1143 if (errno == ENOMEM && count++ < 10) { 1144 warnx("Routing table grew, retrying"); 1145 sleep(1); 1146 free(buf); 1147 goto retry2; 1148 } 1149 err(EX_OSERR, "actual retrieval of interface table"); 1150 } 1151 lim = buf + needed; 1152 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1153 rtm = (struct rt_msghdr *)next; 1154 print_rtmsg(rtm, rtm->rtm_msglen); 1155 } 1156} 1157 1158void 1159monitor(void) 1160{ 1161 int n; 1162 char msg[2048]; 1163 1164 verbose = 1; 1165 if (debugonly) { 1166 interfaces(); 1167 exit(0); 1168 } 1169 for(;;) { 1170 time_t now; 1171 n = read(s, msg, 2048); 1172 now = time(NULL); 1173 (void) printf("\ngot message of size %d on %s", n, ctime(&now)); 1174 print_rtmsg((struct rt_msghdr *)msg, n); 1175 } 1176} 1177 1178struct { 1179 struct rt_msghdr m_rtm; 1180 char m_space[512]; 1181} m_rtmsg; 1182 1183int 1184rtmsg(int cmd, int flags) 1185{ 1186 static int seq; 1187 int rlen; 1188 char *cp = m_rtmsg.m_space; 1189 int l; 1190 1191#define NEXTADDR(w, u) \ 1192 if (rtm_addrs & (w)) {\ 1193 l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\ 1194 if (verbose) sodump(&(u),#u);\ 1195 } 1196 1197 errno = 0; 1198 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1199 if (cmd == 'a') 1200 cmd = RTM_ADD; 1201 else if (cmd == 'c') 1202 cmd = RTM_CHANGE; 1203 else if (cmd == 'g' || cmd == 's') { 1204 cmd = RTM_GET; 1205 if (so_ifp.sa.sa_family == 0) { 1206 so_ifp.sa.sa_family = AF_LINK; 1207 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1208 rtm_addrs |= RTA_IFP; 1209 } 1210 } else 1211 cmd = RTM_DELETE; 1212#define rtm m_rtmsg.m_rtm 1213 rtm.rtm_type = cmd; 1214 rtm.rtm_flags = flags; 1215 rtm.rtm_version = RTM_VERSION; 1216 rtm.rtm_seq = ++seq; 1217 rtm.rtm_addrs = rtm_addrs; 1218 rtm.rtm_rmx = rt_metrics; 1219 rtm.rtm_inits = rtm_inits; 1220 1221 if (rtm_addrs & RTA_NETMASK) 1222 mask_addr(); 1223 NEXTADDR(RTA_DST, so_dst); 1224 NEXTADDR(RTA_GATEWAY, so_gate); 1225 NEXTADDR(RTA_NETMASK, so_mask); 1226 NEXTADDR(RTA_GENMASK, so_genmask); 1227 NEXTADDR(RTA_IFP, so_ifp); 1228 NEXTADDR(RTA_IFA, so_ifa); 1229 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1230 if (verbose) 1231 print_rtmsg(&rtm, l); 1232 if (debugonly) 1233 return (0); 1234 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1235 if (errno == EPERM) 1236 err(1, "writing to routing socket"); 1237 warn("writing to routing socket"); 1238 return (-1); 1239 } 1240 if (cmd == RTM_GET) { 1241 do { 1242 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1243 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1244 if (l < 0) 1245 warn("read from routing socket"); 1246 else 1247 print_getmsg(&rtm, l); 1248 } 1249#undef rtm 1250 return (0); 1251} 1252 1253void 1254mask_addr(void) 1255{ 1256 int olen = so_mask.sa.sa_len; 1257 char *cp1 = olen + (char *)&so_mask, *cp2; 1258 1259 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1260 if (*--cp1 != 0) { 1261 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1262 break; 1263 } 1264 if ((rtm_addrs & RTA_DST) == 0) 1265 return; 1266 switch (so_dst.sa.sa_family) { 1267 case AF_INET: 1268#ifdef INET6 1269 case AF_INET6: 1270#endif 1271 case AF_APPLETALK: 1272 case 0: 1273 return; 1274 } 1275 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1276 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1277 while (cp2 > cp1) 1278 *--cp2 = 0; 1279 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1280 while (cp1 > so_dst.sa.sa_data) 1281 *--cp1 &= *--cp2; 1282} 1283 1284char *msgtypes[] = { 1285 "", 1286 "RTM_ADD: Add Route", 1287 "RTM_DELETE: Delete Route", 1288 "RTM_CHANGE: Change Metrics or flags", 1289 "RTM_GET: Report Metrics", 1290 "RTM_LOSING: Kernel Suspects Partitioning", 1291 "RTM_REDIRECT: Told to use different route", 1292 "RTM_MISS: Lookup failed on this address", 1293 "RTM_LOCK: fix specified metrics", 1294 "RTM_OLDADD: caused by SIOCADDRT", 1295 "RTM_OLDDEL: caused by SIOCDELRT", 1296 "RTM_RESOLVE: Route created by cloning", 1297 "RTM_NEWADDR: address being added to iface", 1298 "RTM_DELADDR: address being removed from iface", 1299 "RTM_IFINFO: iface status change", 1300 "RTM_NEWMADDR: new multicast group membership on iface", 1301 "RTM_DELMADDR: multicast group membership removed from iface", 1302 "RTM_IFANNOUNCE: interface arrival/departure", 1303 0, 1304}; 1305 1306char metricnames[] = 1307"\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" 1308"\1mtu"; 1309char routeflags[] = 1310"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" 1311"\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" 1312"\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" 1313"\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; 1314char ifnetflags[] = 1315"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" 1316"\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" 1317"\017LINK2\020MULTICAST"; 1318char addrnames[] = 1319"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1320 1321void 1322print_rtmsg(struct rt_msghdr *rtm, int msglen) 1323{ 1324 struct if_msghdr *ifm; 1325 struct ifa_msghdr *ifam; 1326#ifdef RTM_NEWMADDR 1327 struct ifma_msghdr *ifmam; 1328#endif 1329 struct if_announcemsghdr *ifan; 1330 char *state; 1331 1332 if (verbose == 0) 1333 return; 1334 if (rtm->rtm_version != RTM_VERSION) { 1335 (void) printf("routing message version %d not understood\n", 1336 rtm->rtm_version); 1337 return; 1338 } 1339 if (msgtypes[rtm->rtm_type] != NULL) 1340 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1341 else 1342 (void)printf("#%d: ", rtm->rtm_type); 1343 (void)printf("len %d, ", rtm->rtm_msglen); 1344 switch (rtm->rtm_type) { 1345 case RTM_IFINFO: 1346 ifm = (struct if_msghdr *)rtm; 1347 (void) printf("if# %d, ", ifm->ifm_index); 1348 switch (ifm->ifm_data.ifi_link_state) { 1349 case LINK_STATE_DOWN: 1350 state = "down"; 1351 break; 1352 case LINK_STATE_UP: 1353 state = "up"; 1354 break; 1355 default: 1356 state = "unknown"; 1357 break; 1358 } 1359 (void) printf("link: %s, flags:", state); 1360 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1361 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1362 break; 1363 case RTM_NEWADDR: 1364 case RTM_DELADDR: 1365 ifam = (struct ifa_msghdr *)rtm; 1366 (void) printf("metric %d, flags:", ifam->ifam_metric); 1367 bprintf(stdout, ifam->ifam_flags, routeflags); 1368 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1369 break; 1370#ifdef RTM_NEWMADDR 1371 case RTM_NEWMADDR: 1372 case RTM_DELMADDR: 1373 ifmam = (struct ifma_msghdr *)rtm; 1374 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs); 1375 break; 1376#endif 1377 case RTM_IFANNOUNCE: 1378 ifan = (struct if_announcemsghdr *)rtm; 1379 (void) printf("if# %d, what: ", ifan->ifan_index); 1380 switch (ifan->ifan_what) { 1381 case IFAN_ARRIVAL: 1382 printf("arrival"); 1383 break; 1384 case IFAN_DEPARTURE: 1385 printf("departure"); 1386 break; 1387 default: 1388 printf("#%d", ifan->ifan_what); 1389 break; 1390 } 1391 printf("\n"); 1392 break; 1393 1394 default: 1395 (void) printf("pid: %ld, seq %d, errno %d, flags:", 1396 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1397 bprintf(stdout, rtm->rtm_flags, routeflags); 1398 pmsg_common(rtm); 1399 } 1400} 1401 1402void 1403print_getmsg(struct rt_msghdr *rtm, int msglen) 1404{ 1405 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; 1406 struct sockaddr_dl *ifp = NULL; 1407 struct sockaddr *sa; 1408 char *cp; 1409 int i; 1410 1411 (void) printf(" route to: %s\n", 1412 routename((struct sockaddr *)&so_dst)); 1413 if (rtm->rtm_version != RTM_VERSION) { 1414 warnx("routing message version %d not understood", 1415 rtm->rtm_version); 1416 return; 1417 } 1418 if (rtm->rtm_msglen > msglen) { 1419 warnx("message length mismatch, in packet %d, returned %d", 1420 rtm->rtm_msglen, msglen); 1421 } 1422 if (rtm->rtm_errno) { 1423 errno = rtm->rtm_errno; 1424 warn("message indicates error %d", errno); 1425 return; 1426 } 1427 cp = ((char *)(rtm + 1)); 1428 if (rtm->rtm_addrs) 1429 for (i = 1; i; i <<= 1) 1430 if (i & rtm->rtm_addrs) { 1431 sa = (struct sockaddr *)cp; 1432 switch (i) { 1433 case RTA_DST: 1434 dst = sa; 1435 break; 1436 case RTA_GATEWAY: 1437 gate = sa; 1438 break; 1439 case RTA_NETMASK: 1440 mask = sa; 1441 break; 1442 case RTA_IFP: 1443 if (sa->sa_family == AF_LINK && 1444 ((struct sockaddr_dl *)sa)->sdl_nlen) 1445 ifp = (struct sockaddr_dl *)sa; 1446 break; 1447 } 1448 cp += SA_SIZE(sa); 1449 } 1450 if (dst && mask) 1451 mask->sa_family = dst->sa_family; /* XXX */ 1452 if (dst) 1453 (void)printf("destination: %s\n", routename(dst)); 1454 if (mask) { 1455 int savenflag = nflag; 1456 1457 nflag = 1; 1458 (void)printf(" mask: %s\n", routename(mask)); 1459 nflag = savenflag; 1460 } 1461 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1462 (void)printf(" gateway: %s\n", routename(gate)); 1463 if (ifp) 1464 (void)printf(" interface: %.*s\n", 1465 ifp->sdl_nlen, ifp->sdl_data); 1466 (void)printf(" flags: "); 1467 bprintf(stdout, rtm->rtm_flags, routeflags); 1468 1469#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1470#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1471 1472 (void) printf("\n%s\n", "\ 1473 recvpipe sendpipe ssthresh rtt,msec mtu weight expire"); 1474 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1475 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1476 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1477 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1478 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1479 printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); 1480 if (rtm->rtm_rmx.rmx_expire) 1481 rtm->rtm_rmx.rmx_expire -= time(0); 1482 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1483#undef lock 1484#undef msec 1485#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1486 if (verbose) 1487 pmsg_common(rtm); 1488 else if (rtm->rtm_addrs &~ RTA_IGN) { 1489 (void) printf("sockaddrs: "); 1490 bprintf(stdout, rtm->rtm_addrs, addrnames); 1491 putchar('\n'); 1492 } 1493#undef RTA_IGN 1494} 1495 1496void 1497pmsg_common(struct rt_msghdr *rtm) 1498{ 1499 (void) printf("\nlocks: "); 1500 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1501 (void) printf(" inits: "); 1502 bprintf(stdout, rtm->rtm_inits, metricnames); 1503 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1504} 1505 1506void 1507pmsg_addrs(char *cp, int addrs) 1508{ 1509 struct sockaddr *sa; 1510 int i; 1511 1512 if (addrs == 0) { 1513 (void) putchar('\n'); 1514 return; 1515 } 1516 (void) printf("\nsockaddrs: "); 1517 bprintf(stdout, addrs, addrnames); 1518 (void) putchar('\n'); 1519 for (i = 1; i; i <<= 1) 1520 if (i & addrs) { 1521 sa = (struct sockaddr *)cp; 1522 (void) printf(" %s", routename(sa)); 1523 cp += SA_SIZE(sa); 1524 } 1525 (void) putchar('\n'); 1526 (void) fflush(stdout); 1527} 1528 1529void 1530bprintf(FILE *fp, int b, u_char *s) 1531{ 1532 int i; 1533 int gotsome = 0; 1534 1535 if (b == 0) 1536 return; 1537 while ((i = *s++) != 0) { 1538 if (b & (1 << (i-1))) { 1539 if (gotsome == 0) 1540 i = '<'; 1541 else 1542 i = ','; 1543 (void) putc(i, fp); 1544 gotsome = 1; 1545 for (; (i = *s) > 32; s++) 1546 (void) putc(i, fp); 1547 } else 1548 while (*s > 32) 1549 s++; 1550 } 1551 if (gotsome) 1552 (void) putc('>', fp); 1553} 1554 1555int 1556keyword(char *cp) 1557{ 1558 struct keytab *kt = keywords; 1559 1560 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1561 kt++; 1562 return kt->kt_i; 1563} 1564 1565void 1566sodump(sup su, char *which) 1567{ 1568 switch (su->sa.sa_family) { 1569 case AF_LINK: 1570 (void) printf("%s: link %s; ", 1571 which, link_ntoa(&su->sdl)); 1572 break; 1573 case AF_INET: 1574 (void) printf("%s: inet %s; ", 1575 which, inet_ntoa(su->sin.sin_addr)); 1576 break; 1577 case AF_APPLETALK: 1578 (void) printf("%s: atalk %s; ", 1579 which, atalk_ntoa(su->sat.sat_addr)); 1580 break; 1581 } 1582 (void) fflush(stdout); 1583} 1584 1585/* States*/ 1586#define VIRGIN 0 1587#define GOTONE 1 1588#define GOTTWO 2 1589/* Inputs */ 1590#define DIGIT (4*0) 1591#define END (4*1) 1592#define DELIM (4*2) 1593 1594void 1595sockaddr(char *addr, struct sockaddr *sa) 1596{ 1597 char *cp = (char *)sa; 1598 int size = sa->sa_len; 1599 char *cplim = cp + size; 1600 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; 1601 1602 memset(cp, 0, size); 1603 cp++; 1604 do { 1605 if ((*addr >= '0') && (*addr <= '9')) { 1606 new = *addr - '0'; 1607 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1608 new = *addr - 'a' + 10; 1609 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1610 new = *addr - 'A' + 10; 1611 } else if (*addr == 0) 1612 state |= END; 1613 else 1614 state |= DELIM; 1615 addr++; 1616 switch (state /* | INPUT */) { 1617 case GOTTWO | DIGIT: 1618 *cp++ = byte; /*FALLTHROUGH*/ 1619 case VIRGIN | DIGIT: 1620 state = GOTONE; byte = new; continue; 1621 case GOTONE | DIGIT: 1622 state = GOTTWO; byte = new + (byte << 4); continue; 1623 default: /* | DELIM */ 1624 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1625 case GOTONE | END: 1626 case GOTTWO | END: 1627 *cp++ = byte; /* FALLTHROUGH */ 1628 case VIRGIN | END: 1629 break; 1630 } 1631 break; 1632 } while (cp < cplim); 1633 sa->sa_len = cp - (char *)sa; 1634} 1635 1636int 1637atalk_aton(const char *text, struct at_addr *addr) 1638{ 1639 u_int net, node; 1640 1641 if (sscanf(text, "%u.%u", &net, &node) != 2 1642 || net > 0xffff || node > 0xff) 1643 return(0); 1644 addr->s_net = htons(net); 1645 addr->s_node = node; 1646 return(1); 1647} 1648 1649char * 1650atalk_ntoa(struct at_addr at) 1651{ 1652 static char buf[20]; 1653 1654 (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node); 1655 return(buf); 1656} 1657