route.c revision 1.43
1 /* $NetBSD: route.c,v 1.43 1999/11/27 02:19:34 soren 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 1.43 1999/11/27 02:19:34 soren 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(i); 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(af) 18 /* width of destination column */ 230 #define WID_GW(af) 18 /* width of gateway column */ 231 #else 232 /* width of destination/gateway column */ 233 #ifdef KAME_SCOPEID 234 /* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 */ 235 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 34 : 18) : 18) 236 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18) 237 #else 238 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 239 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 29 : 18) : 18) 240 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 25 : 18) : 18) 241 #endif 242 #endif /* INET6 */ 243 244 /* 245 * Print header for routing table columns. 246 */ 247 void 248 pr_rthdr(af) 249 int af; 250 { 251 if (Aflag) 252 printf("%-8.8s ","Address"); 253 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 254 WID_DST(af), WID_DST(af), "Destination", 255 WID_GW(af), WID_GW(af), "Gateway", 256 "Flags", "Refs", "Use", "Mtu", "Interface"); 257 } 258 259 static struct sockaddr * 260 kgetsa(dst) 261 struct sockaddr *dst; 262 { 263 264 kget(dst, pt_u.u_sa); 265 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 266 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 267 return (&pt_u.u_sa); 268 } 269 270 static void 271 p_tree(rn) 272 struct radix_node *rn; 273 { 274 275 again: 276 kget(rn, rnode); 277 if (rnode.rn_b < 0) { 278 if (Aflag) 279 printf("%-8.8lx ", (u_long) rn); 280 if (rnode.rn_flags & RNF_ROOT) { 281 if (Aflag) 282 printf("(root node)%s", 283 rnode.rn_dupedkey ? " =>\n" : "\n"); 284 } else if (do_rtent) { 285 kget(rn, rtentry); 286 p_rtentry(&rtentry); 287 if (Aflag) 288 p_rtnode(); 289 } else { 290 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 291 NULL, 0, 44); 292 putchar('\n'); 293 } 294 if ((rn = rnode.rn_dupedkey) != NULL) 295 goto again; 296 } else { 297 if (Aflag && do_rtent) { 298 printf("%-8.8lx ", (u_long) rn); 299 p_rtnode(); 300 } 301 rn = rnode.rn_r; 302 p_tree(rnode.rn_l); 303 p_tree(rn); 304 } 305 } 306 307 static void 308 p_rtnode() 309 { 310 struct radix_mask *rm = rnode.rn_mklist; 311 char nbuf[20]; 312 313 if (rnode.rn_b < 0) { 314 if (rnode.rn_mask) { 315 printf("\t mask "); 316 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 317 NULL, 0, -1); 318 } else if (rm == 0) 319 return; 320 } else { 321 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 322 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 323 (u_long) rnode.rn_r); 324 } 325 while (rm) { 326 kget(rm, rmask); 327 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 328 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 329 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 330 if (rmask.rm_flags & RNF_NORMAL) { 331 struct radix_node rnode_aux; 332 printf(" <normal>, "); 333 kget(rmask.rm_leaf, rnode_aux); 334 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 335 NULL, 0, -1); 336 } else 337 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 338 NULL, 0, -1); 339 putchar('}'); 340 if ((rm = rmask.rm_mklist) != NULL) 341 printf(" ->"); 342 } 343 putchar('\n'); 344 } 345 346 static void 347 ntreestuff() 348 { 349 size_t needed; 350 int mib[6]; 351 char *buf, *next, *lim; 352 struct rt_msghdr *rtm; 353 354 mib[0] = CTL_NET; 355 mib[1] = PF_ROUTE; 356 mib[2] = 0; 357 mib[3] = 0; 358 mib[4] = NET_RT_DUMP; 359 mib[5] = 0; 360 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 361 err(1, "route sysctl estimate"); 362 if ((buf = malloc(needed)) == 0) 363 errx(1, "out of space"); 364 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 365 err(1, "sysctl of routing table"); 366 lim = buf + needed; 367 for (next = buf; next < lim; next += rtm->rtm_msglen) { 368 rtm = (struct rt_msghdr *)next; 369 np_rtentry(rtm); 370 } 371 } 372 373 static void 374 np_rtentry(rtm) 375 struct rt_msghdr *rtm; 376 { 377 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 378 #ifdef notdef 379 static int masks_done, banner_printed; 380 #endif 381 static int old_af; 382 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 383 384 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 385 return; 386 #ifdef notdef 387 /* for the moment, netmasks are skipped over */ 388 if (!banner_printed) { 389 printf("Netmasks:\n"); 390 banner_printed = 1; 391 } 392 if (masks_done == 0) { 393 if (rtm->rtm_addrs != RTA_DST ) { 394 masks_done = 1; 395 af = sa->sa_family; 396 } 397 } else 398 #endif 399 af = sa->sa_family; 400 if (af != old_af) { 401 pr_family(af); 402 old_af = af; 403 } 404 if (rtm->rtm_addrs == RTA_DST) 405 p_sockaddr(sa, NULL, 0, 36); 406 else { 407 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 408 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 409 p_sockaddr(sa, NULL, 0, 18); 410 } 411 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 412 putchar('\n'); 413 } 414 415 static void 416 p_sockaddr(sa, mask, flags, width) 417 const struct sockaddr *sa, *mask; 418 int flags, width; 419 { 420 char workbuf[128], *cplim; 421 char *cp = workbuf; 422 423 switch(sa->sa_family) { 424 case AF_INET: 425 { 426 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 427 428 if (sin->sin_addr.s_addr == INADDR_ANY) 429 cp = "default"; 430 else if (flags & RTF_HOST) 431 cp = routename(sin->sin_addr.s_addr); 432 else if (mask) 433 cp = netname(sin->sin_addr.s_addr, 434 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 435 else 436 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 437 break; 438 } 439 440 #ifdef INET6 441 case AF_INET6: 442 { 443 struct in6_addr *in6 = &((struct sockaddr_in6 *)sa)->sin6_addr; 444 445 if (flags & RTF_HOST) 446 cp = routename6((char *)in6); 447 else if (mask) { 448 cp = netname6(in6, 449 &((struct sockaddr_in6 *)mask)->sin6_addr); 450 } else 451 cp = (char *)inet_ntop(AF_INET6, in6, ntop_buf, 452 sizeof(ntop_buf)); 453 break; 454 } 455 #endif 456 457 #ifndef SMALL 458 case AF_APPLETALK: 459 case 0: 460 { 461 if (!(flags & RTF_HOST) && mask) 462 cp = atalk_print2(sa,mask,11); 463 else 464 cp = atalk_print(sa,11); 465 break; 466 } 467 case AF_NS: 468 cp = ns_print((struct sockaddr *)sa); 469 break; 470 #endif 471 472 case AF_LINK: 473 { 474 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 475 476 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 477 sdl->sdl_slen == 0) 478 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 479 sdl->sdl_index); 480 else switch (sdl->sdl_type) { 481 case IFT_FDDI: 482 case IFT_ETHER: 483 { 484 int i; 485 u_char *lla = (u_char *)sdl->sdl_data + 486 sdl->sdl_nlen; 487 488 cplim = ""; 489 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 490 /* XXX */ 491 cp += sprintf(cp, "%s%02x", cplim, *lla); 492 cplim = ":"; 493 } 494 cp = workbuf; 495 break; 496 } 497 default: 498 cp = link_ntoa(sdl); 499 break; 500 } 501 break; 502 } 503 504 default: 505 { 506 u_char *s = (u_char *)sa->sa_data, *slim; 507 508 slim = sa->sa_len + (u_char *) sa; 509 cplim = cp + sizeof(workbuf) - 6; 510 cp += sprintf(cp, "(%d)", sa->sa_family); 511 while (s < slim && cp < cplim) { 512 cp += sprintf(cp, " %02x", *s++); 513 if (s < slim) 514 cp += sprintf(cp, "%02x", *s++); 515 } 516 cp = workbuf; 517 } 518 } 519 if (width < 0 ) 520 printf("%s ", cp); 521 else { 522 if (nflag) 523 printf("%-*s ", width, cp); 524 else 525 printf("%-*.*s ", width, width, cp); 526 } 527 } 528 529 static void 530 p_flags(f, format) 531 int f; 532 char *format; 533 { 534 char name[33], *flags; 535 struct bits *p = bits; 536 537 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 538 if (p->b_mask & f) 539 *flags++ = p->b_val; 540 *flags = '\0'; 541 printf(format, name); 542 } 543 544 static struct sockaddr *sockcopy __P((struct sockaddr *, 545 union sockaddr_union *)); 546 547 /* 548 * copy a sockaddr into an allocated region, allocate at least sockaddr 549 * bytes and zero unused 550 */ 551 static struct sockaddr * 552 sockcopy(sp, dp) 553 struct sockaddr *sp; 554 union sockaddr_union *dp; 555 { 556 int len; 557 558 if (sp == 0 || sp->sa_len == 0) 559 (void)memset(dp, 0, sizeof (*sp)); 560 else { 561 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 562 (void)memcpy(dp, sp, len); 563 } 564 return ((struct sockaddr *)dp); 565 } 566 567 static void 568 p_rtentry(rt) 569 struct rtentry *rt; 570 { 571 static struct ifnet ifnet, *lastif; 572 union sockaddr_union addr_un, mask_un; 573 struct sockaddr *addr, *mask; 574 int af; 575 576 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 577 return; 578 579 memset(&addr_un, 0, sizeof(addr_un)); 580 memset(&mask_un, 0, sizeof(mask_un)); 581 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 582 af = addr->sa_family; 583 if (rt_mask(rt)) 584 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 585 else 586 mask = sockcopy(NULL, &mask_un); 587 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 588 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 589 p_flags(rt->rt_flags, "%-6.6s "); 590 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 591 if (rt->rt_rmx.rmx_mtu) 592 printf("%6lu", rt->rt_rmx.rmx_mtu); 593 else 594 printf("%6s", "-"); 595 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 596 if (rt->rt_ifp) { 597 if (rt->rt_ifp != lastif) { 598 kget(rt->rt_ifp, ifnet); 599 lastif = rt->rt_ifp; 600 } 601 printf(" %.16s%s", ifnet.if_xname, 602 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 603 } 604 putchar('\n'); 605 if (vflag) { 606 printf("\texpire %10lu%c recvpipe %10ld%c " 607 "sendpipe %10ld%c\n", 608 rt->rt_rmx.rmx_expire, 609 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 610 rt->rt_rmx.rmx_recvpipe, 611 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 612 rt->rt_rmx.rmx_sendpipe, 613 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 614 printf("\tssthresh %10lu%c rtt %10ld%c " 615 "rttvar %10ld%c\n", 616 rt->rt_rmx.rmx_ssthresh, 617 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 618 rt->rt_rmx.rmx_rtt, 619 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 620 rt->rt_rmx.rmx_rttvar, 621 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 622 } 623 624 } 625 626 char * 627 routename(in) 628 u_int32_t in; 629 { 630 char *cp; 631 static char line[MAXHOSTNAMELEN + 1]; 632 struct hostent *hp; 633 static char domain[MAXHOSTNAMELEN + 1]; 634 static int first = 1; 635 636 if (first) { 637 first = 0; 638 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 639 domain[sizeof(domain) - 1] = '\0'; 640 if ((cp = strchr(domain, '.'))) 641 (void)strcpy(domain, cp + 1); 642 else 643 domain[0] = 0; 644 } else 645 domain[0] = 0; 646 } 647 cp = 0; 648 if (!nflag) { 649 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 650 AF_INET); 651 if (hp) { 652 if ((cp = strchr(hp->h_name, '.')) && 653 !strcmp(cp + 1, domain)) 654 *cp = 0; 655 cp = hp->h_name; 656 } 657 } 658 if (cp) { 659 strncpy(line, cp, sizeof(line) - 1); 660 line[sizeof(line) - 1] = '\0'; 661 } else { 662 #define C(x) ((x) & 0xff) 663 in = ntohl(in); 664 snprintf(line, sizeof line, "%u.%u.%u.%u", 665 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 666 } 667 return (line); 668 } 669 670 static u_long 671 forgemask(a) 672 u_long a; 673 { 674 u_long m; 675 676 if (IN_CLASSA(a)) 677 m = IN_CLASSA_NET; 678 else if (IN_CLASSB(a)) 679 m = IN_CLASSB_NET; 680 else 681 m = IN_CLASSC_NET; 682 return (m); 683 } 684 685 static void 686 domask(dst, dlen, addr, mask) 687 char *dst; 688 size_t dlen; 689 u_long addr, mask; 690 { 691 int b, i; 692 693 if (!mask || (forgemask(addr) == mask)) { 694 *dst = '\0'; 695 return; 696 } 697 i = 0; 698 for (b = 0; b < 32; b++) 699 if (mask & (1 << b)) { 700 int bb; 701 702 i = b; 703 for (bb = b+1; bb < 32; bb++) 704 if (!(mask & (1 << bb))) { 705 i = -1; /* noncontig */ 706 break; 707 } 708 break; 709 } 710 if (i == -1) 711 (void)snprintf(dst, dlen, "&0x%lx", mask); 712 else 713 (void)snprintf(dst, dlen, "/%d", 32-i); 714 } 715 716 /* 717 * Return the name of the network whose address is given. 718 * The address is assumed to be that of a net or subnet, not a host. 719 */ 720 char * 721 netname(in, mask) 722 u_int32_t in, mask; 723 { 724 char *cp = 0; 725 static char line[MAXHOSTNAMELEN + 4]; 726 struct netent *np = 0; 727 u_int32_t net, omask; 728 u_int32_t i; 729 int subnetshift; 730 731 i = ntohl(in); 732 omask = mask = ntohl(mask); 733 if (!nflag && i != INADDR_ANY) { 734 if (mask == INADDR_ANY) { 735 switch (mask = forgemask(i)) { 736 case IN_CLASSA_NET: 737 subnetshift = 8; 738 break; 739 case IN_CLASSB_NET: 740 subnetshift = 8; 741 break; 742 case IN_CLASSC_NET: 743 subnetshift = 4; 744 break; 745 default: 746 abort(); 747 } 748 /* 749 * If there are more bits than the standard mask 750 * would suggest, subnets must be in use. 751 * Guess at the subnet mask, assuming reasonable 752 * width subnet fields. 753 */ 754 while (i &~ mask) 755 mask = (long)mask >> subnetshift; 756 } 757 net = i & mask; 758 /* 759 * Note: shift the hosts bits out in octet units, since 760 * not all versions of getnetbyaddr() do this for us (e.g. 761 * the current `etc/networks' parser). 762 */ 763 while ((mask & 0xff) == 0) 764 mask >>= 8, net >>= 8; 765 np = getnetbyaddr(net, AF_INET); 766 if (np) 767 cp = np->n_name; 768 } 769 if (cp) 770 strncpy(line, cp, sizeof(line) - 1); 771 else if ((i & 0xffffff) == 0) 772 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 773 else if ((i & 0xffff) == 0) 774 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 775 , C(i >> 16)); 776 else if ((i & 0xff) == 0) 777 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 778 C(i >> 16), C(i >> 8)); 779 else 780 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 781 C(i >> 16), C(i >> 8), C(i)); 782 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 783 return (line); 784 } 785 786 #ifdef INET6 787 char * 788 netname6(in6, mask) 789 struct in6_addr *in6; 790 struct in6_addr *mask; 791 { 792 static char line[MAXHOSTNAMELEN + 1]; 793 struct in6_addr net6; 794 u_char *p; 795 u_char *lim; 796 int masklen, final = 0, illegal = 0; 797 int i; 798 799 net6 = *in6; 800 for (i = 0; i < sizeof(net6); i++) 801 net6.s6_addr[i] &= mask->s6_addr[i]; 802 803 masklen = 0; 804 lim = (u_char *)mask + 16; 805 for (p = (u_char *)mask; p < lim; p++) { 806 if (final && *p) { 807 illegal++; 808 continue; 809 } 810 811 switch (*p & 0xff) { 812 case 0xff: 813 masklen += 8; 814 break; 815 case 0xfe: 816 masklen += 7; 817 final++; 818 break; 819 case 0xfc: 820 masklen += 6; 821 final++; 822 break; 823 case 0xf8: 824 masklen += 5; 825 final++; 826 break; 827 case 0xf0: 828 masklen += 4; 829 final++; 830 break; 831 case 0xe0: 832 masklen += 3; 833 final++; 834 break; 835 case 0xc0: 836 masklen += 2; 837 final++; 838 break; 839 case 0x80: 840 masklen += 1; 841 final++; 842 break; 843 case 0x00: 844 final++; 845 break; 846 default: 847 final++; 848 illegal++; 849 break; 850 } 851 } 852 853 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(in6)) 854 return("default"); 855 856 if (illegal) 857 fprintf(stderr, "illegal prefixlen\n"); 858 sprintf(line, "%s/%d", inet_ntop(AF_INET6, &net6, ntop_buf, 859 sizeof(ntop_buf)), 860 masklen); 861 return line; 862 } 863 864 char * 865 routename6(in6) 866 char *in6; 867 { 868 static char line[MAXHOSTNAMELEN + 1]; 869 sprintf(line, "%s", inet_ntop(AF_INET6, in6, ntop_buf, 870 sizeof(ntop_buf))); 871 return line; 872 } 873 #endif /*INET6*/ 874 875 /* 876 * Print routing statistics 877 */ 878 void 879 rt_stats(off) 880 u_long off; 881 { 882 struct rtstat rtstat; 883 884 if (off == 0) { 885 printf("rtstat: symbol not in namelist\n"); 886 return; 887 } 888 kread(off, (char *)&rtstat, sizeof (rtstat)); 889 printf("routing:\n"); 890 printf("\t%u bad routing redirect%s\n", 891 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 892 printf("\t%u dynamically created route%s\n", 893 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 894 printf("\t%u new gateway%s due to redirects\n", 895 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 896 printf("\t%u destination%s found unreachable\n", 897 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 898 printf("\t%u use%s of a wildcard route\n", 899 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 900 } 901 short ns_nullh[] = {0,0,0}; 902 short ns_bh[] = {-1,-1,-1}; 903 904 char * 905 ns_print(sa) 906 struct sockaddr *sa; 907 { 908 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 909 struct ns_addr work; 910 union { 911 union ns_net net_e; 912 u_long long_e; 913 } net; 914 u_short port; 915 static char mybuf[50], cport[10], chost[25]; 916 char *host = ""; 917 char *p; 918 u_char *q; 919 920 work = sns->sns_addr; 921 port = ntohs(work.x_port); 922 work.x_port = 0; 923 net.net_e = work.x_net; 924 if (ns_nullhost(work) && net.long_e == 0) { 925 if (port ) { 926 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 927 upHex(mybuf); 928 } else 929 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 930 return (mybuf); 931 } 932 933 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 934 host = "any"; 935 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 936 host = "*"; 937 } else { 938 q = work.x_host.c_host; 939 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 940 q[0], q[1], q[2], q[3], q[4], q[5]); 941 for (p = chost; *p == '0' && p < chost + 12; p++) 942 continue; 943 host = p; 944 } 945 if (port) 946 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 947 else 948 *cport = 0; 949 950 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 951 host, cport); 952 upHex(mybuf); 953 return (mybuf); 954 } 955 956 char * 957 ns_phost(sa) 958 struct sockaddr *sa; 959 { 960 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 961 struct sockaddr_ns work; 962 static union ns_net ns_zeronet; 963 char *p; 964 965 work = *sns; 966 work.sns_addr.x_port = 0; 967 work.sns_addr.x_net = ns_zeronet; 968 969 p = ns_print((struct sockaddr *)&work); 970 if (strncmp("0H.", p, 3) == 0) 971 p += 3; 972 return (p); 973 } 974 975 void 976 upHex(p0) 977 char *p0; 978 { 979 char *p = p0; 980 981 for (; *p; p++) 982 switch (*p) { 983 case 'a': 984 case 'b': 985 case 'c': 986 case 'd': 987 case 'e': 988 case 'f': 989 *p += ('A' - 'a'); 990 } 991 } 992
Indexes created Wed Sep 24 05:09:52 GMT 2025