route.c revision 1.39
1 /* $NetBSD: route.c,v 1.39 1999/09/03 04:26:31 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "from: @(#)route.c 8.3 (Berkeley) 3/9/94"; 40 #else 41 __RCSID("$NetBSD: route.c,v 1.39 1999/09/03 04:26:31 itojun Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/protosw.h> 47 #include <sys/socket.h> 48 #include <sys/mbuf.h> 49 #include <sys/un.h> 50 51 #include <net/if.h> 52 #include <net/if_dl.h> 53 #include <net/if_types.h> 54 #define _KERNEL 55 #include <net/route.h> 56 #undef _KERNEL 57 #include <netinet/in.h> 58 #include <netatalk/at.h> 59 #include <netiso/iso.h> 60 61 #include <netns/ns.h> 62 63 #include <sys/sysctl.h> 64 65 #include <arpa/inet.h> 66 67 #include <err.h> 68 #include <netdb.h> 69 #include <stdio.h> 70 #include <stdlib.h> 71 #include <string.h> 72 #include <unistd.h> 73 74 #include "netstat.h" 75 76 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d))) 77 78 /* alignment constraint for routing socket */ 79 #define ROUNDUP(a) \ 80 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 81 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 82 83 /* 84 * Definitions for showing gateway flags. 85 */ 86 struct bits { 87 short b_mask; 88 char b_val; 89 } bits[] = { 90 { RTF_UP, 'U' }, 91 { RTF_GATEWAY, 'G' }, 92 { RTF_HOST, 'H' }, 93 { RTF_REJECT, 'R' }, 94 { RTF_DYNAMIC, 'D' }, 95 { RTF_MODIFIED, 'M' }, 96 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 97 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */ 98 { RTF_CLONING, 'C' }, 99 { RTF_XRESOLVE, 'X' }, 100 { RTF_LLINFO, 'L' }, 101 { RTF_STATIC, 'S' }, 102 { RTF_PROTO1, '1' }, 103 { RTF_PROTO2, '2' }, 104 { 0 } 105 }; 106 107 /* 108 * XXX we put all of the sockaddr types in here to force the alignment 109 * to be correct. 110 */ 111 static union sockaddr_union { 112 struct sockaddr u_sa; 113 struct sockaddr_in u_in; 114 struct sockaddr_un u_un; 115 struct sockaddr_iso u_iso; 116 struct sockaddr_at u_at; 117 struct sockaddr_dl u_dl; 118 struct sockaddr_ns u_ns; 119 u_short u_data[128]; 120 int u_dummy; /* force word-alignment */ 121 } pt_u; 122 123 int do_rtent = 0; 124 struct rtentry rtentry; 125 struct radix_node rnode; 126 struct radix_mask rmask; 127 128 int NewTree = 0; 129 130 static struct sockaddr *kgetsa __P((struct sockaddr *)); 131 static void p_tree __P((struct radix_node *)); 132 static void p_rtnode __P((void)); 133 static void ntreestuff __P((void)); 134 static void np_rtentry __P((struct rt_msghdr *)); 135 static void p_sockaddr __P((const struct sockaddr *, 136 const struct sockaddr *, int, int)); 137 static void p_flags __P((int, char *)); 138 static void p_rtentry __P((struct rtentry *)); 139 static void ntreestuff __P((void)); 140 static u_long forgemask __P((u_long)); 141 static void domask __P((char *, size_t, u_long, u_long)); 142 #ifdef INET6 143 char *netname6 __P((struct in6_addr *, struct in6_addr *)); 144 static char ntop_buf[INET6_ADDRSTRLEN]; 145 #endif 146 147 /* 148 * Print routing tables. 149 */ 150 void 151 routepr(rtree) 152 u_long rtree; 153 { 154 struct radix_node_head *rnh, head; 155 int i; 156 157 printf("Routing tables\n"); 158 159 if (Aflag == 0 && NewTree) 160 ntreestuff(); 161 else { 162 if (rtree == 0) { 163 printf("rt_tables: symbol not in namelist\n"); 164 return; 165 } 166 167 kget(rtree, rt_tables); 168 for (i = 0; i <= AF_MAX; i++) { 169 if ((rnh = rt_tables[i]) == 0) 170 continue; 171 kget(rnh, head); 172 if (i == AF_UNSPEC) { 173 if (Aflag && af == 0) { 174 printf("Netmasks:\n"); 175 p_tree(head.rnh_treetop); 176 } 177 } else if (af == AF_UNSPEC || af == i) { 178 pr_family(i); 179 do_rtent = 1; 180 pr_rthdr(); 181 p_tree(head.rnh_treetop); 182 } 183 } 184 } 185 } 186 187 /* 188 * Print address family header before a section of the routing table. 189 */ 190 void 191 pr_family(af) 192 int af; 193 { 194 char *afname; 195 196 switch (af) { 197 case AF_INET: 198 afname = "Internet"; 199 break; 200 #ifdef INET6 201 case AF_INET6: 202 afname = "Internet6"; 203 break; 204 #endif 205 case AF_NS: 206 afname = "XNS"; 207 break; 208 case AF_ISO: 209 afname = "ISO"; 210 break; 211 case AF_APPLETALK: 212 afname = "AppleTalk"; 213 break; 214 case AF_CCITT: 215 afname = "X.25"; 216 break; 217 default: 218 afname = NULL; 219 break; 220 } 221 if (afname) 222 printf("\n%s:\n", afname); 223 else 224 printf("\nProtocol Family %d:\n", af); 225 } 226 227 /* column widths; each followed by one space */ 228 #ifndef INET6 229 #define WID_DST 18 /* width of destination column */ 230 #define WID_GW 18 /* width of gateway column */ 231 #else 232 #define WID_DST (nflag ? 28 : 18) /* width of destination column */ 233 #define WID_GW (nflag ? 26 : 18) /* width of gateway column */ 234 #endif /* INET6 */ 235 236 /* 237 * Print header for routing table columns. 238 */ 239 void 240 pr_rthdr() 241 { 242 243 if (Aflag) 244 printf("%-8.8s ","Address"); 245 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 246 WID_DST, WID_DST, "Destination", 247 WID_GW, WID_GW, "Gateway", 248 "Flags", "Refs", "Use", "Mtu", "Interface"); 249 } 250 251 static struct sockaddr * 252 kgetsa(dst) 253 struct sockaddr *dst; 254 { 255 256 kget(dst, pt_u.u_sa); 257 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 258 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 259 return (&pt_u.u_sa); 260 } 261 262 static void 263 p_tree(rn) 264 struct radix_node *rn; 265 { 266 267 again: 268 kget(rn, rnode); 269 if (rnode.rn_b < 0) { 270 if (Aflag) 271 printf("%-8.8lx ", (u_long) rn); 272 if (rnode.rn_flags & RNF_ROOT) { 273 if (Aflag) 274 printf("(root node)%s", 275 rnode.rn_dupedkey ? " =>\n" : "\n"); 276 } else if (do_rtent) { 277 kget(rn, rtentry); 278 p_rtentry(&rtentry); 279 if (Aflag) 280 p_rtnode(); 281 } else { 282 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 283 NULL, 0, 44); 284 putchar('\n'); 285 } 286 if ((rn = rnode.rn_dupedkey) != NULL) 287 goto again; 288 } else { 289 if (Aflag && do_rtent) { 290 printf("%-8.8lx ", (u_long) rn); 291 p_rtnode(); 292 } 293 rn = rnode.rn_r; 294 p_tree(rnode.rn_l); 295 p_tree(rn); 296 } 297 } 298 299 static void 300 p_rtnode() 301 { 302 struct radix_mask *rm = rnode.rn_mklist; 303 char nbuf[20]; 304 305 if (rnode.rn_b < 0) { 306 if (rnode.rn_mask) { 307 printf("\t mask "); 308 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 309 NULL, 0, -1); 310 } else if (rm == 0) 311 return; 312 } else { 313 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 314 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 315 (u_long) rnode.rn_r); 316 } 317 while (rm) { 318 kget(rm, rmask); 319 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 320 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 321 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 322 if (rmask.rm_flags & RNF_NORMAL) { 323 struct radix_node rnode_aux; 324 printf(" <normal>, "); 325 kget(rmask.rm_leaf, rnode_aux); 326 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 327 NULL, 0, -1); 328 } else 329 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 330 NULL, 0, -1); 331 putchar('}'); 332 if ((rm = rmask.rm_mklist) != NULL) 333 printf(" ->"); 334 } 335 putchar('\n'); 336 } 337 338 static void 339 ntreestuff() 340 { 341 size_t needed; 342 int mib[6]; 343 char *buf, *next, *lim; 344 struct rt_msghdr *rtm; 345 346 mib[0] = CTL_NET; 347 mib[1] = PF_ROUTE; 348 mib[2] = 0; 349 mib[3] = 0; 350 mib[4] = NET_RT_DUMP; 351 mib[5] = 0; 352 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 353 err(1, "route sysctl estimate"); 354 if ((buf = malloc(needed)) == 0) 355 errx(1, "out of space"); 356 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 357 err(1, "sysctl of routing table"); 358 lim = buf + needed; 359 for (next = buf; next < lim; next += rtm->rtm_msglen) { 360 rtm = (struct rt_msghdr *)next; 361 np_rtentry(rtm); 362 } 363 } 364 365 static void 366 np_rtentry(rtm) 367 struct rt_msghdr *rtm; 368 { 369 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 370 #ifdef notdef 371 static int masks_done, banner_printed; 372 #endif 373 static int old_af; 374 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 375 376 #ifdef notdef 377 /* for the moment, netmasks are skipped over */ 378 if (!banner_printed) { 379 printf("Netmasks:\n"); 380 banner_printed = 1; 381 } 382 if (masks_done == 0) { 383 if (rtm->rtm_addrs != RTA_DST ) { 384 masks_done = 1; 385 af = sa->sa_family; 386 } 387 } else 388 #endif 389 af = sa->sa_family; 390 if (af != old_af) { 391 pr_family(af); 392 old_af = af; 393 } 394 if (rtm->rtm_addrs == RTA_DST) 395 p_sockaddr(sa, NULL, 0, 36); 396 else { 397 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 398 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 399 p_sockaddr(sa, NULL, 0, 18); 400 } 401 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 402 putchar('\n'); 403 } 404 405 static void 406 p_sockaddr(sa, mask, flags, width) 407 const struct sockaddr *sa, *mask; 408 int flags, width; 409 { 410 char workbuf[128], *cplim; 411 char *cp = workbuf; 412 413 switch(sa->sa_family) { 414 case AF_INET: 415 { 416 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 417 418 if (sin->sin_addr.s_addr == INADDR_ANY) 419 cp = "default"; 420 else if (flags & RTF_HOST) 421 cp = routename(sin->sin_addr.s_addr); 422 else if (mask) 423 cp = netname(sin->sin_addr.s_addr, 424 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 425 else 426 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 427 break; 428 } 429 430 #ifdef INET6 431 case AF_INET6: 432 { 433 struct in6_addr *in6 = &((struct sockaddr_in6 *)sa)->sin6_addr; 434 435 if (flags & RTF_HOST) 436 cp = routename6((char *)in6); 437 else if (mask) { 438 cp = netname6(in6, 439 &((struct sockaddr_in6 *)mask)->sin6_addr); 440 } else 441 cp = (char *)inet_ntop(AF_INET6, in6, ntop_buf, 442 sizeof(ntop_buf)); 443 break; 444 } 445 #endif 446 447 #ifndef SMALL 448 case AF_APPLETALK: 449 case 0: 450 { 451 if (!(flags & RTF_HOST) && mask) 452 cp = atalk_print2(sa,mask,11); 453 else 454 cp = atalk_print(sa,11); 455 break; 456 } 457 case AF_NS: 458 cp = ns_print((struct sockaddr *)sa); 459 break; 460 #endif 461 462 case AF_LINK: 463 { 464 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 465 466 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 467 sdl->sdl_slen == 0) 468 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 469 sdl->sdl_index); 470 else switch (sdl->sdl_type) { 471 case IFT_FDDI: 472 case IFT_ETHER: 473 { 474 int i; 475 u_char *lla = (u_char *)sdl->sdl_data + 476 sdl->sdl_nlen; 477 478 cplim = ""; 479 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 480 /* XXX */ 481 cp += sprintf(cp, "%s%02x", cplim, *lla); 482 cplim = ":"; 483 } 484 cp = workbuf; 485 break; 486 } 487 default: 488 cp = link_ntoa(sdl); 489 break; 490 } 491 break; 492 } 493 494 default: 495 { 496 u_char *s = (u_char *)sa->sa_data, *slim; 497 498 slim = sa->sa_len + (u_char *) sa; 499 cplim = cp + sizeof(workbuf) - 6; 500 cp += sprintf(cp, "(%d)", sa->sa_family); 501 while (s < slim && cp < cplim) { 502 cp += sprintf(cp, " %02x", *s++); 503 if (s < slim) 504 cp += sprintf(cp, "%02x", *s++); 505 } 506 cp = workbuf; 507 } 508 } 509 if (width < 0 ) 510 printf("%s ", cp); 511 else { 512 if (nflag) 513 printf("%-*s ", width, cp); 514 else 515 printf("%-*.*s ", width, width, cp); 516 } 517 } 518 519 static void 520 p_flags(f, format) 521 int f; 522 char *format; 523 { 524 char name[33], *flags; 525 struct bits *p = bits; 526 527 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 528 if (p->b_mask & f) 529 *flags++ = p->b_val; 530 *flags = '\0'; 531 printf(format, name); 532 } 533 534 static struct sockaddr *sockcopy __P((struct sockaddr *, 535 union sockaddr_union *)); 536 537 /* 538 * copy a sockaddr into an allocated region, allocate at least sockaddr 539 * bytes and zero unused 540 */ 541 static struct sockaddr * 542 sockcopy(sp, dp) 543 struct sockaddr *sp; 544 union sockaddr_union *dp; 545 { 546 int len; 547 548 if (sp == 0 || sp->sa_len == 0) 549 (void)memset(dp, 0, sizeof (*sp)); 550 else { 551 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 552 (void)memcpy(dp, sp, len); 553 } 554 return ((struct sockaddr *)dp); 555 } 556 557 static void 558 p_rtentry(rt) 559 struct rtentry *rt; 560 { 561 static struct ifnet ifnet, *lastif; 562 union sockaddr_union addr_un, mask_un; 563 struct sockaddr *addr, *mask; 564 565 memset(&addr_un, 0, sizeof(addr_un)); 566 memset(&mask_un, 0, sizeof(mask_un)); 567 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 568 if (rt_mask(rt)) 569 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 570 else 571 mask = sockcopy(NULL, &mask_un); 572 p_sockaddr(addr, mask, rt->rt_flags, WID_DST); 573 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW); 574 p_flags(rt->rt_flags, "%-6.6s "); 575 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 576 if (rt->rt_rmx.rmx_mtu) 577 printf("%6lu", rt->rt_rmx.rmx_mtu); 578 else 579 printf("%6s", "-"); 580 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 581 if (rt->rt_ifp) { 582 if (rt->rt_ifp != lastif) { 583 kget(rt->rt_ifp, ifnet); 584 lastif = rt->rt_ifp; 585 } 586 printf(" %.16s%s", ifnet.if_xname, 587 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 588 } 589 putchar('\n'); 590 if (vflag) { 591 printf("\texpire %10lu%c recvpipe %10ld%c " 592 "sendpipe %10ld%c\n", 593 rt->rt_rmx.rmx_expire, 594 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 595 rt->rt_rmx.rmx_recvpipe, 596 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 597 rt->rt_rmx.rmx_sendpipe, 598 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 599 printf("\tssthresh %10lu%c rtt %10ld%c " 600 "rttvar %10ld%c\n", 601 rt->rt_rmx.rmx_ssthresh, 602 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 603 rt->rt_rmx.rmx_rtt, 604 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 605 rt->rt_rmx.rmx_rttvar, 606 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 607 } 608 609 } 610 611 char * 612 routename(in) 613 u_int32_t in; 614 { 615 char *cp; 616 static char line[MAXHOSTNAMELEN + 1]; 617 struct hostent *hp; 618 static char domain[MAXHOSTNAMELEN + 1]; 619 static int first = 1; 620 621 if (first) { 622 first = 0; 623 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 624 domain[sizeof(domain) - 1] = '\0'; 625 if ((cp = strchr(domain, '.'))) 626 (void)strcpy(domain, cp + 1); 627 else 628 domain[0] = 0; 629 } else 630 domain[0] = 0; 631 } 632 cp = 0; 633 if (!nflag) { 634 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 635 AF_INET); 636 if (hp) { 637 if ((cp = strchr(hp->h_name, '.')) && 638 !strcmp(cp + 1, domain)) 639 *cp = 0; 640 cp = hp->h_name; 641 } 642 } 643 if (cp) { 644 strncpy(line, cp, sizeof(line) - 1); 645 line[sizeof(line) - 1] = '\0'; 646 } else { 647 #define C(x) ((x) & 0xff) 648 in = ntohl(in); 649 snprintf(line, sizeof line, "%u.%u.%u.%u", 650 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 651 } 652 return (line); 653 } 654 655 static u_long 656 forgemask(a) 657 u_long a; 658 { 659 u_long m; 660 661 if (IN_CLASSA(a)) 662 m = IN_CLASSA_NET; 663 else if (IN_CLASSB(a)) 664 m = IN_CLASSB_NET; 665 else 666 m = IN_CLASSC_NET; 667 return (m); 668 } 669 670 static void 671 domask(dst, dlen, addr, mask) 672 char *dst; 673 size_t dlen; 674 u_long addr, mask; 675 { 676 int b, i; 677 678 if (!mask || (forgemask(addr) == mask)) { 679 *dst = '\0'; 680 return; 681 } 682 i = 0; 683 for (b = 0; b < 32; b++) 684 if (mask & (1 << b)) { 685 int bb; 686 687 i = b; 688 for (bb = b+1; bb < 32; bb++) 689 if (!(mask & (1 << bb))) { 690 i = -1; /* noncontig */ 691 break; 692 } 693 break; 694 } 695 if (i == -1) 696 (void)snprintf(dst, dlen, "&0x%lx", mask); 697 else 698 (void)snprintf(dst, dlen, "/%d", 32-i); 699 } 700 701 /* 702 * Return the name of the network whose address is given. 703 * The address is assumed to be that of a net or subnet, not a host. 704 */ 705 char * 706 netname(in, mask) 707 u_int32_t in, mask; 708 { 709 char *cp = 0; 710 static char line[MAXHOSTNAMELEN + 4]; 711 struct netent *np = 0; 712 u_int32_t net, omask; 713 u_int32_t i; 714 int subnetshift; 715 716 i = ntohl(in); 717 omask = mask = ntohl(mask); 718 if (!nflag && i != INADDR_ANY) { 719 if (mask == INADDR_ANY) { 720 switch (mask = forgemask(i)) { 721 case IN_CLASSA_NET: 722 subnetshift = 8; 723 break; 724 case IN_CLASSB_NET: 725 subnetshift = 8; 726 break; 727 case IN_CLASSC_NET: 728 subnetshift = 4; 729 break; 730 default: 731 abort(); 732 } 733 /* 734 * If there are more bits than the standard mask 735 * would suggest, subnets must be in use. 736 * Guess at the subnet mask, assuming reasonable 737 * width subnet fields. 738 */ 739 while (i &~ mask) 740 mask = (long)mask >> subnetshift; 741 } 742 net = i & mask; 743 /* 744 * Note: shift the hosts bits out in octet units, since 745 * not all versions of getnetbyaddr() do this for us (e.g. 746 * the current `etc/networks' parser). 747 */ 748 while ((mask & 0xff) == 0) 749 mask >>= 8, net >>= 8; 750 np = getnetbyaddr(net, AF_INET); 751 if (np) 752 cp = np->n_name; 753 } 754 if (cp) 755 strncpy(line, cp, sizeof(line) - 1); 756 else if ((i & 0xffffff) == 0) 757 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 758 else if ((i & 0xffff) == 0) 759 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 760 , C(i >> 16)); 761 else if ((i & 0xff) == 0) 762 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 763 C(i >> 16), C(i >> 8)); 764 else 765 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 766 C(i >> 16), C(i >> 8), C(i)); 767 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 768 return (line); 769 } 770 771 #ifdef INET6 772 char * 773 netname6(in6, mask) 774 struct in6_addr *in6; 775 struct in6_addr *mask; 776 { 777 static char line[MAXHOSTNAMELEN + 1]; 778 struct in6_addr net6; 779 u_char *p; 780 u_char *lim; 781 int masklen, final = 0, illegal = 0; 782 int i; 783 784 net6 = *in6; 785 for (i = 0; i < sizeof(net6); i++) 786 net6.s6_addr[i] &= mask->s6_addr[i]; 787 788 masklen = 0; 789 lim = (u_char *)mask + 16; 790 for (p = (u_char *)mask; p < lim; p++) { 791 if (final && *p) { 792 illegal++; 793 continue; 794 } 795 796 switch (*p & 0xff) { 797 case 0xff: 798 masklen += 8; 799 break; 800 case 0xfe: 801 masklen += 7; 802 final++; 803 break; 804 case 0xfc: 805 masklen += 6; 806 final++; 807 break; 808 case 0xf8: 809 masklen += 5; 810 final++; 811 break; 812 case 0xf0: 813 masklen += 4; 814 final++; 815 break; 816 case 0xe0: 817 masklen += 3; 818 final++; 819 break; 820 case 0xc0: 821 masklen += 2; 822 final++; 823 break; 824 case 0x80: 825 masklen += 1; 826 final++; 827 break; 828 case 0x00: 829 final++; 830 break; 831 default: 832 final++; 833 illegal++; 834 break; 835 } 836 } 837 838 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(in6)) 839 return("default"); 840 841 if (illegal) 842 fprintf(stderr, "illegal prefixlen\n"); 843 sprintf(line, "%s/%d", inet_ntop(AF_INET6, &net6, ntop_buf, 844 sizeof(ntop_buf)), 845 masklen); 846 return line; 847 } 848 849 char * 850 routename6(in6) 851 char *in6; 852 { 853 static char line[MAXHOSTNAMELEN + 1]; 854 sprintf(line, "%s", inet_ntop(AF_INET6, in6, ntop_buf, 855 sizeof(ntop_buf))); 856 return line; 857 } 858 #endif /*INET6*/ 859 860 /* 861 * Print routing statistics 862 */ 863 void 864 rt_stats(off) 865 u_long off; 866 { 867 struct rtstat rtstat; 868 869 if (off == 0) { 870 printf("rtstat: symbol not in namelist\n"); 871 return; 872 } 873 kread(off, (char *)&rtstat, sizeof (rtstat)); 874 printf("routing:\n"); 875 printf("\t%u bad routing redirect%s\n", 876 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 877 printf("\t%u dynamically created route%s\n", 878 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 879 printf("\t%u new gateway%s due to redirects\n", 880 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 881 printf("\t%u destination%s found unreachable\n", 882 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 883 printf("\t%u use%s of a wildcard route\n", 884 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 885 } 886 short ns_nullh[] = {0,0,0}; 887 short ns_bh[] = {-1,-1,-1}; 888 889 char * 890 ns_print(sa) 891 struct sockaddr *sa; 892 { 893 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 894 struct ns_addr work; 895 union { 896 union ns_net net_e; 897 u_long long_e; 898 } net; 899 u_short port; 900 static char mybuf[50], cport[10], chost[25]; 901 char *host = ""; 902 char *p; 903 u_char *q; 904 905 work = sns->sns_addr; 906 port = ntohs(work.x_port); 907 work.x_port = 0; 908 net.net_e = work.x_net; 909 if (ns_nullhost(work) && net.long_e == 0) { 910 if (port ) { 911 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 912 upHex(mybuf); 913 } else 914 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 915 return (mybuf); 916 } 917 918 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 919 host = "any"; 920 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 921 host = "*"; 922 } else { 923 q = work.x_host.c_host; 924 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 925 q[0], q[1], q[2], q[3], q[4], q[5]); 926 for (p = chost; *p == '0' && p < chost + 12; p++) 927 continue; 928 host = p; 929 } 930 if (port) 931 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 932 else 933 *cport = 0; 934 935 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 936 host, cport); 937 upHex(mybuf); 938 return (mybuf); 939 } 940 941 char * 942 ns_phost(sa) 943 struct sockaddr *sa; 944 { 945 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 946 struct sockaddr_ns work; 947 static union ns_net ns_zeronet; 948 char *p; 949 950 work = *sns; 951 work.sns_addr.x_port = 0; 952 work.sns_addr.x_net = ns_zeronet; 953 954 p = ns_print((struct sockaddr *)&work); 955 if (strncmp("0H.", p, 3) == 0) 956 p += 3; 957 return (p); 958 } 959 960 void 961 upHex(p0) 962 char *p0; 963 { 964 char *p = p0; 965 966 for (; *p; p++) 967 switch (*p) { 968 case 'a': 969 case 'b': 970 case 'c': 971 case 'd': 972 case 'e': 973 case 'f': 974 *p += ('A' - 'a'); 975 } 976 } 977
Indexes created Tue Sep 23 22:09:46 GMT 2025