route.c revision 1.42
1 /* $NetBSD: route.c,v 1.42 1999/11/24 08:45:43 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 1.42 1999/11/24 08:45:43 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(af); 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 { 251 252 if (Aflag) 253 printf("%-8.8s ","Address"); 254 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 255 WID_DST(af), WID_DST(af), "Destination", 256 WID_GW(af), WID_GW(af), "Gateway", 257 "Flags", "Refs", "Use", "Mtu", "Interface"); 258 } 259 260 static struct sockaddr * 261 kgetsa(dst) 262 struct sockaddr *dst; 263 { 264 265 kget(dst, pt_u.u_sa); 266 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 267 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 268 return (&pt_u.u_sa); 269 } 270 271 static void 272 p_tree(rn) 273 struct radix_node *rn; 274 { 275 276 again: 277 kget(rn, rnode); 278 if (rnode.rn_b < 0) { 279 if (Aflag) 280 printf("%-8.8lx ", (u_long) rn); 281 if (rnode.rn_flags & RNF_ROOT) { 282 if (Aflag) 283 printf("(root node)%s", 284 rnode.rn_dupedkey ? " =>\n" : "\n"); 285 } else if (do_rtent) { 286 kget(rn, rtentry); 287 p_rtentry(&rtentry); 288 if (Aflag) 289 p_rtnode(); 290 } else { 291 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 292 NULL, 0, 44); 293 putchar('\n'); 294 } 295 if ((rn = rnode.rn_dupedkey) != NULL) 296 goto again; 297 } else { 298 if (Aflag && do_rtent) { 299 printf("%-8.8lx ", (u_long) rn); 300 p_rtnode(); 301 } 302 rn = rnode.rn_r; 303 p_tree(rnode.rn_l); 304 p_tree(rn); 305 } 306 } 307 308 static void 309 p_rtnode() 310 { 311 struct radix_mask *rm = rnode.rn_mklist; 312 char nbuf[20]; 313 314 if (rnode.rn_b < 0) { 315 if (rnode.rn_mask) { 316 printf("\t mask "); 317 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 318 NULL, 0, -1); 319 } else if (rm == 0) 320 return; 321 } else { 322 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 323 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 324 (u_long) rnode.rn_r); 325 } 326 while (rm) { 327 kget(rm, rmask); 328 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 329 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 330 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 331 if (rmask.rm_flags & RNF_NORMAL) { 332 struct radix_node rnode_aux; 333 printf(" <normal>, "); 334 kget(rmask.rm_leaf, rnode_aux); 335 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 336 NULL, 0, -1); 337 } else 338 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 339 NULL, 0, -1); 340 putchar('}'); 341 if ((rm = rmask.rm_mklist) != NULL) 342 printf(" ->"); 343 } 344 putchar('\n'); 345 } 346 347 static void 348 ntreestuff() 349 { 350 size_t needed; 351 int mib[6]; 352 char *buf, *next, *lim; 353 struct rt_msghdr *rtm; 354 355 mib[0] = CTL_NET; 356 mib[1] = PF_ROUTE; 357 mib[2] = 0; 358 mib[3] = 0; 359 mib[4] = NET_RT_DUMP; 360 mib[5] = 0; 361 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 362 err(1, "route sysctl estimate"); 363 if ((buf = malloc(needed)) == 0) 364 errx(1, "out of space"); 365 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 366 err(1, "sysctl of routing table"); 367 lim = buf + needed; 368 for (next = buf; next < lim; next += rtm->rtm_msglen) { 369 rtm = (struct rt_msghdr *)next; 370 np_rtentry(rtm); 371 } 372 } 373 374 static void 375 np_rtentry(rtm) 376 struct rt_msghdr *rtm; 377 { 378 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 379 #ifdef notdef 380 static int masks_done, banner_printed; 381 #endif 382 static int old_af; 383 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 384 385 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 386 return; 387 #ifdef notdef 388 /* for the moment, netmasks are skipped over */ 389 if (!banner_printed) { 390 printf("Netmasks:\n"); 391 banner_printed = 1; 392 } 393 if (masks_done == 0) { 394 if (rtm->rtm_addrs != RTA_DST ) { 395 masks_done = 1; 396 af = sa->sa_family; 397 } 398 } else 399 #endif 400 af = sa->sa_family; 401 if (af != old_af) { 402 pr_family(af); 403 old_af = af; 404 } 405 if (rtm->rtm_addrs == RTA_DST) 406 p_sockaddr(sa, NULL, 0, 36); 407 else { 408 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 409 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 410 p_sockaddr(sa, NULL, 0, 18); 411 } 412 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 413 putchar('\n'); 414 } 415 416 static void 417 p_sockaddr(sa, mask, flags, width) 418 const struct sockaddr *sa, *mask; 419 int flags, width; 420 { 421 char workbuf[128], *cplim; 422 char *cp = workbuf; 423 424 switch(sa->sa_family) { 425 case AF_INET: 426 { 427 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 428 429 if (sin->sin_addr.s_addr == INADDR_ANY) 430 cp = "default"; 431 else if (flags & RTF_HOST) 432 cp = routename(sin->sin_addr.s_addr); 433 else if (mask) 434 cp = netname(sin->sin_addr.s_addr, 435 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 436 else 437 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 438 break; 439 } 440 441 #ifdef INET6 442 case AF_INET6: 443 { 444 struct in6_addr *in6 = &((struct sockaddr_in6 *)sa)->sin6_addr; 445 446 if (flags & RTF_HOST) 447 cp = routename6((char *)in6); 448 else if (mask) { 449 cp = netname6(in6, 450 &((struct sockaddr_in6 *)mask)->sin6_addr); 451 } else 452 cp = (char *)inet_ntop(AF_INET6, in6, ntop_buf, 453 sizeof(ntop_buf)); 454 break; 455 } 456 #endif 457 458 #ifndef SMALL 459 case AF_APPLETALK: 460 case 0: 461 { 462 if (!(flags & RTF_HOST) && mask) 463 cp = atalk_print2(sa,mask,11); 464 else 465 cp = atalk_print(sa,11); 466 break; 467 } 468 case AF_NS: 469 cp = ns_print((struct sockaddr *)sa); 470 break; 471 #endif 472 473 case AF_LINK: 474 { 475 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 476 477 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 478 sdl->sdl_slen == 0) 479 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 480 sdl->sdl_index); 481 else switch (sdl->sdl_type) { 482 case IFT_FDDI: 483 case IFT_ETHER: 484 { 485 int i; 486 u_char *lla = (u_char *)sdl->sdl_data + 487 sdl->sdl_nlen; 488 489 cplim = ""; 490 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 491 /* XXX */ 492 cp += sprintf(cp, "%s%02x", cplim, *lla); 493 cplim = ":"; 494 } 495 cp = workbuf; 496 break; 497 } 498 default: 499 cp = link_ntoa(sdl); 500 break; 501 } 502 break; 503 } 504 505 default: 506 { 507 u_char *s = (u_char *)sa->sa_data, *slim; 508 509 slim = sa->sa_len + (u_char *) sa; 510 cplim = cp + sizeof(workbuf) - 6; 511 cp += sprintf(cp, "(%d)", sa->sa_family); 512 while (s < slim && cp < cplim) { 513 cp += sprintf(cp, " %02x", *s++); 514 if (s < slim) 515 cp += sprintf(cp, "%02x", *s++); 516 } 517 cp = workbuf; 518 } 519 } 520 if (width < 0 ) 521 printf("%s ", cp); 522 else { 523 if (nflag) 524 printf("%-*s ", width, cp); 525 else 526 printf("%-*.*s ", width, width, cp); 527 } 528 } 529 530 static void 531 p_flags(f, format) 532 int f; 533 char *format; 534 { 535 char name[33], *flags; 536 struct bits *p = bits; 537 538 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 539 if (p->b_mask & f) 540 *flags++ = p->b_val; 541 *flags = '\0'; 542 printf(format, name); 543 } 544 545 static struct sockaddr *sockcopy __P((struct sockaddr *, 546 union sockaddr_union *)); 547 548 /* 549 * copy a sockaddr into an allocated region, allocate at least sockaddr 550 * bytes and zero unused 551 */ 552 static struct sockaddr * 553 sockcopy(sp, dp) 554 struct sockaddr *sp; 555 union sockaddr_union *dp; 556 { 557 int len; 558 559 if (sp == 0 || sp->sa_len == 0) 560 (void)memset(dp, 0, sizeof (*sp)); 561 else { 562 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 563 (void)memcpy(dp, sp, len); 564 } 565 return ((struct sockaddr *)dp); 566 } 567 568 static void 569 p_rtentry(rt) 570 struct rtentry *rt; 571 { 572 static struct ifnet ifnet, *lastif; 573 union sockaddr_union addr_un, mask_un; 574 struct sockaddr *addr, *mask; 575 int af; 576 577 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 578 return; 579 580 memset(&addr_un, 0, sizeof(addr_un)); 581 memset(&mask_un, 0, sizeof(mask_un)); 582 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 583 af = addr->sa_family; 584 if (rt_mask(rt)) 585 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 586 else 587 mask = sockcopy(NULL, &mask_un); 588 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 589 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 590 p_flags(rt->rt_flags, "%-6.6s "); 591 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 592 if (rt->rt_rmx.rmx_mtu) 593 printf("%6lu", rt->rt_rmx.rmx_mtu); 594 else 595 printf("%6s", "-"); 596 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 597 if (rt->rt_ifp) { 598 if (rt->rt_ifp != lastif) { 599 kget(rt->rt_ifp, ifnet); 600 lastif = rt->rt_ifp; 601 } 602 printf(" %.16s%s", ifnet.if_xname, 603 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 604 } 605 putchar('\n'); 606 if (vflag) { 607 printf("\texpire %10lu%c recvpipe %10ld%c " 608 "sendpipe %10ld%c\n", 609 rt->rt_rmx.rmx_expire, 610 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 611 rt->rt_rmx.rmx_recvpipe, 612 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 613 rt->rt_rmx.rmx_sendpipe, 614 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 615 printf("\tssthresh %10lu%c rtt %10ld%c " 616 "rttvar %10ld%c\n", 617 rt->rt_rmx.rmx_ssthresh, 618 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 619 rt->rt_rmx.rmx_rtt, 620 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 621 rt->rt_rmx.rmx_rttvar, 622 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 623 } 624 625 } 626 627 char * 628 routename(in) 629 u_int32_t in; 630 { 631 char *cp; 632 static char line[MAXHOSTNAMELEN + 1]; 633 struct hostent *hp; 634 static char domain[MAXHOSTNAMELEN + 1]; 635 static int first = 1; 636 637 if (first) { 638 first = 0; 639 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 640 domain[sizeof(domain) - 1] = '\0'; 641 if ((cp = strchr(domain, '.'))) 642 (void)strcpy(domain, cp + 1); 643 else 644 domain[0] = 0; 645 } else 646 domain[0] = 0; 647 } 648 cp = 0; 649 if (!nflag) { 650 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 651 AF_INET); 652 if (hp) { 653 if ((cp = strchr(hp->h_name, '.')) && 654 !strcmp(cp + 1, domain)) 655 *cp = 0; 656 cp = hp->h_name; 657 } 658 } 659 if (cp) { 660 strncpy(line, cp, sizeof(line) - 1); 661 line[sizeof(line) - 1] = '\0'; 662 } else { 663 #define C(x) ((x) & 0xff) 664 in = ntohl(in); 665 snprintf(line, sizeof line, "%u.%u.%u.%u", 666 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 667 } 668 return (line); 669 } 670 671 static u_long 672 forgemask(a) 673 u_long a; 674 { 675 u_long m; 676 677 if (IN_CLASSA(a)) 678 m = IN_CLASSA_NET; 679 else if (IN_CLASSB(a)) 680 m = IN_CLASSB_NET; 681 else 682 m = IN_CLASSC_NET; 683 return (m); 684 } 685 686 static void 687 domask(dst, dlen, addr, mask) 688 char *dst; 689 size_t dlen; 690 u_long addr, mask; 691 { 692 int b, i; 693 694 if (!mask || (forgemask(addr) == mask)) { 695 *dst = '\0'; 696 return; 697 } 698 i = 0; 699 for (b = 0; b < 32; b++) 700 if (mask & (1 << b)) { 701 int bb; 702 703 i = b; 704 for (bb = b+1; bb < 32; bb++) 705 if (!(mask & (1 << bb))) { 706 i = -1; /* noncontig */ 707 break; 708 } 709 break; 710 } 711 if (i == -1) 712 (void)snprintf(dst, dlen, "&0x%lx", mask); 713 else 714 (void)snprintf(dst, dlen, "/%d", 32-i); 715 } 716 717 /* 718 * Return the name of the network whose address is given. 719 * The address is assumed to be that of a net or subnet, not a host. 720 */ 721 char * 722 netname(in, mask) 723 u_int32_t in, mask; 724 { 725 char *cp = 0; 726 static char line[MAXHOSTNAMELEN + 4]; 727 struct netent *np = 0; 728 u_int32_t net, omask; 729 u_int32_t i; 730 int subnetshift; 731 732 i = ntohl(in); 733 omask = mask = ntohl(mask); 734 if (!nflag && i != INADDR_ANY) { 735 if (mask == INADDR_ANY) { 736 switch (mask = forgemask(i)) { 737 case IN_CLASSA_NET: 738 subnetshift = 8; 739 break; 740 case IN_CLASSB_NET: 741 subnetshift = 8; 742 break; 743 case IN_CLASSC_NET: 744 subnetshift = 4; 745 break; 746 default: 747 abort(); 748 } 749 /* 750 * If there are more bits than the standard mask 751 * would suggest, subnets must be in use. 752 * Guess at the subnet mask, assuming reasonable 753 * width subnet fields. 754 */ 755 while (i &~ mask) 756 mask = (long)mask >> subnetshift; 757 } 758 net = i & mask; 759 /* 760 * Note: shift the hosts bits out in octet units, since 761 * not all versions of getnetbyaddr() do this for us (e.g. 762 * the current `etc/networks' parser). 763 */ 764 while ((mask & 0xff) == 0) 765 mask >>= 8, net >>= 8; 766 np = getnetbyaddr(net, AF_INET); 767 if (np) 768 cp = np->n_name; 769 } 770 if (cp) 771 strncpy(line, cp, sizeof(line) - 1); 772 else if ((i & 0xffffff) == 0) 773 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 774 else if ((i & 0xffff) == 0) 775 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 776 , C(i >> 16)); 777 else if ((i & 0xff) == 0) 778 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 779 C(i >> 16), C(i >> 8)); 780 else 781 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 782 C(i >> 16), C(i >> 8), C(i)); 783 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 784 return (line); 785 } 786 787 #ifdef INET6 788 char * 789 netname6(in6, mask) 790 struct in6_addr *in6; 791 struct in6_addr *mask; 792 { 793 static char line[MAXHOSTNAMELEN + 1]; 794 struct in6_addr net6; 795 u_char *p; 796 u_char *lim; 797 int masklen, final = 0, illegal = 0; 798 int i; 799 800 net6 = *in6; 801 for (i = 0; i < sizeof(net6); i++) 802 net6.s6_addr[i] &= mask->s6_addr[i]; 803 804 masklen = 0; 805 lim = (u_char *)mask + 16; 806 for (p = (u_char *)mask; p < lim; p++) { 807 if (final && *p) { 808 illegal++; 809 continue; 810 } 811 812 switch (*p & 0xff) { 813 case 0xff: 814 masklen += 8; 815 break; 816 case 0xfe: 817 masklen += 7; 818 final++; 819 break; 820 case 0xfc: 821 masklen += 6; 822 final++; 823 break; 824 case 0xf8: 825 masklen += 5; 826 final++; 827 break; 828 case 0xf0: 829 masklen += 4; 830 final++; 831 break; 832 case 0xe0: 833 masklen += 3; 834 final++; 835 break; 836 case 0xc0: 837 masklen += 2; 838 final++; 839 break; 840 case 0x80: 841 masklen += 1; 842 final++; 843 break; 844 case 0x00: 845 final++; 846 break; 847 default: 848 final++; 849 illegal++; 850 break; 851 } 852 } 853 854 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(in6)) 855 return("default"); 856 857 if (illegal) 858 fprintf(stderr, "illegal prefixlen\n"); 859 sprintf(line, "%s/%d", inet_ntop(AF_INET6, &net6, ntop_buf, 860 sizeof(ntop_buf)), 861 masklen); 862 return line; 863 } 864 865 char * 866 routename6(in6) 867 char *in6; 868 { 869 static char line[MAXHOSTNAMELEN + 1]; 870 sprintf(line, "%s", inet_ntop(AF_INET6, in6, ntop_buf, 871 sizeof(ntop_buf))); 872 return line; 873 } 874 #endif /*INET6*/ 875 876 /* 877 * Print routing statistics 878 */ 879 void 880 rt_stats(off) 881 u_long off; 882 { 883 struct rtstat rtstat; 884 885 if (off == 0) { 886 printf("rtstat: symbol not in namelist\n"); 887 return; 888 } 889 kread(off, (char *)&rtstat, sizeof (rtstat)); 890 printf("routing:\n"); 891 printf("\t%u bad routing redirect%s\n", 892 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 893 printf("\t%u dynamically created route%s\n", 894 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 895 printf("\t%u new gateway%s due to redirects\n", 896 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 897 printf("\t%u destination%s found unreachable\n", 898 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 899 printf("\t%u use%s of a wildcard route\n", 900 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 901 } 902 short ns_nullh[] = {0,0,0}; 903 short ns_bh[] = {-1,-1,-1}; 904 905 char * 906 ns_print(sa) 907 struct sockaddr *sa; 908 { 909 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 910 struct ns_addr work; 911 union { 912 union ns_net net_e; 913 u_long long_e; 914 } net; 915 u_short port; 916 static char mybuf[50], cport[10], chost[25]; 917 char *host = ""; 918 char *p; 919 u_char *q; 920 921 work = sns->sns_addr; 922 port = ntohs(work.x_port); 923 work.x_port = 0; 924 net.net_e = work.x_net; 925 if (ns_nullhost(work) && net.long_e == 0) { 926 if (port ) { 927 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 928 upHex(mybuf); 929 } else 930 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 931 return (mybuf); 932 } 933 934 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 935 host = "any"; 936 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 937 host = "*"; 938 } else { 939 q = work.x_host.c_host; 940 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 941 q[0], q[1], q[2], q[3], q[4], q[5]); 942 for (p = chost; *p == '0' && p < chost + 12; p++) 943 continue; 944 host = p; 945 } 946 if (port) 947 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 948 else 949 *cport = 0; 950 951 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 952 host, cport); 953 upHex(mybuf); 954 return (mybuf); 955 } 956 957 char * 958 ns_phost(sa) 959 struct sockaddr *sa; 960 { 961 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 962 struct sockaddr_ns work; 963 static union ns_net ns_zeronet; 964 char *p; 965 966 work = *sns; 967 work.sns_addr.x_port = 0; 968 work.sns_addr.x_net = ns_zeronet; 969 970 p = ns_print((struct sockaddr *)&work); 971 if (strncmp("0H.", p, 3) == 0) 972 p += 3; 973 return (p); 974 } 975 976 void 977 upHex(p0) 978 char *p0; 979 { 980 char *p = p0; 981 982 for (; *p; p++) 983 switch (*p) { 984 case 'a': 985 case 'b': 986 case 'c': 987 case 'd': 988 case 'e': 989 case 'f': 990 *p += ('A' - 'a'); 991 } 992 } 993
Indexes created Wed Sep 24 02:09:48 GMT 2025