route.c revision 1.40
1 /* $NetBSD: route.c,v 1.40 1999/09/15 20:12:18 is 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 1.40 1999/09/15 20:12:18 is 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 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 377 return; 378 #ifdef notdef 379 /* for the moment, netmasks are skipped over */ 380 if (!banner_printed) { 381 printf("Netmasks:\n"); 382 banner_printed = 1; 383 } 384 if (masks_done == 0) { 385 if (rtm->rtm_addrs != RTA_DST ) { 386 masks_done = 1; 387 af = sa->sa_family; 388 } 389 } else 390 #endif 391 af = sa->sa_family; 392 if (af != old_af) { 393 pr_family(af); 394 old_af = af; 395 } 396 if (rtm->rtm_addrs == RTA_DST) 397 p_sockaddr(sa, NULL, 0, 36); 398 else { 399 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 400 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 401 p_sockaddr(sa, NULL, 0, 18); 402 } 403 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 404 putchar('\n'); 405 } 406 407 static void 408 p_sockaddr(sa, mask, flags, width) 409 const struct sockaddr *sa, *mask; 410 int flags, width; 411 { 412 char workbuf[128], *cplim; 413 char *cp = workbuf; 414 415 switch(sa->sa_family) { 416 case AF_INET: 417 { 418 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 419 420 if (sin->sin_addr.s_addr == INADDR_ANY) 421 cp = "default"; 422 else if (flags & RTF_HOST) 423 cp = routename(sin->sin_addr.s_addr); 424 else if (mask) 425 cp = netname(sin->sin_addr.s_addr, 426 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 427 else 428 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 429 break; 430 } 431 432 #ifdef INET6 433 case AF_INET6: 434 { 435 struct in6_addr *in6 = &((struct sockaddr_in6 *)sa)->sin6_addr; 436 437 if (flags & RTF_HOST) 438 cp = routename6((char *)in6); 439 else if (mask) { 440 cp = netname6(in6, 441 &((struct sockaddr_in6 *)mask)->sin6_addr); 442 } else 443 cp = (char *)inet_ntop(AF_INET6, in6, ntop_buf, 444 sizeof(ntop_buf)); 445 break; 446 } 447 #endif 448 449 #ifndef SMALL 450 case AF_APPLETALK: 451 case 0: 452 { 453 if (!(flags & RTF_HOST) && mask) 454 cp = atalk_print2(sa,mask,11); 455 else 456 cp = atalk_print(sa,11); 457 break; 458 } 459 case AF_NS: 460 cp = ns_print((struct sockaddr *)sa); 461 break; 462 #endif 463 464 case AF_LINK: 465 { 466 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 467 468 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 469 sdl->sdl_slen == 0) 470 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 471 sdl->sdl_index); 472 else switch (sdl->sdl_type) { 473 case IFT_FDDI: 474 case IFT_ETHER: 475 { 476 int i; 477 u_char *lla = (u_char *)sdl->sdl_data + 478 sdl->sdl_nlen; 479 480 cplim = ""; 481 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 482 /* XXX */ 483 cp += sprintf(cp, "%s%02x", cplim, *lla); 484 cplim = ":"; 485 } 486 cp = workbuf; 487 break; 488 } 489 default: 490 cp = link_ntoa(sdl); 491 break; 492 } 493 break; 494 } 495 496 default: 497 { 498 u_char *s = (u_char *)sa->sa_data, *slim; 499 500 slim = sa->sa_len + (u_char *) sa; 501 cplim = cp + sizeof(workbuf) - 6; 502 cp += sprintf(cp, "(%d)", sa->sa_family); 503 while (s < slim && cp < cplim) { 504 cp += sprintf(cp, " %02x", *s++); 505 if (s < slim) 506 cp += sprintf(cp, "%02x", *s++); 507 } 508 cp = workbuf; 509 } 510 } 511 if (width < 0 ) 512 printf("%s ", cp); 513 else { 514 if (nflag) 515 printf("%-*s ", width, cp); 516 else 517 printf("%-*.*s ", width, width, cp); 518 } 519 } 520 521 static void 522 p_flags(f, format) 523 int f; 524 char *format; 525 { 526 char name[33], *flags; 527 struct bits *p = bits; 528 529 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 530 if (p->b_mask & f) 531 *flags++ = p->b_val; 532 *flags = '\0'; 533 printf(format, name); 534 } 535 536 static struct sockaddr *sockcopy __P((struct sockaddr *, 537 union sockaddr_union *)); 538 539 /* 540 * copy a sockaddr into an allocated region, allocate at least sockaddr 541 * bytes and zero unused 542 */ 543 static struct sockaddr * 544 sockcopy(sp, dp) 545 struct sockaddr *sp; 546 union sockaddr_union *dp; 547 { 548 int len; 549 550 if (sp == 0 || sp->sa_len == 0) 551 (void)memset(dp, 0, sizeof (*sp)); 552 else { 553 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 554 (void)memcpy(dp, sp, len); 555 } 556 return ((struct sockaddr *)dp); 557 } 558 559 static void 560 p_rtentry(rt) 561 struct rtentry *rt; 562 { 563 static struct ifnet ifnet, *lastif; 564 union sockaddr_union addr_un, mask_un; 565 struct sockaddr *addr, *mask; 566 567 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 568 return; 569 570 memset(&addr_un, 0, sizeof(addr_un)); 571 memset(&mask_un, 0, sizeof(mask_un)); 572 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 573 if (rt_mask(rt)) 574 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 575 else 576 mask = sockcopy(NULL, &mask_un); 577 p_sockaddr(addr, mask, rt->rt_flags, WID_DST); 578 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW); 579 p_flags(rt->rt_flags, "%-6.6s "); 580 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 581 if (rt->rt_rmx.rmx_mtu) 582 printf("%6lu", rt->rt_rmx.rmx_mtu); 583 else 584 printf("%6s", "-"); 585 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 586 if (rt->rt_ifp) { 587 if (rt->rt_ifp != lastif) { 588 kget(rt->rt_ifp, ifnet); 589 lastif = rt->rt_ifp; 590 } 591 printf(" %.16s%s", ifnet.if_xname, 592 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 593 } 594 putchar('\n'); 595 if (vflag) { 596 printf("\texpire %10lu%c recvpipe %10ld%c " 597 "sendpipe %10ld%c\n", 598 rt->rt_rmx.rmx_expire, 599 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 600 rt->rt_rmx.rmx_recvpipe, 601 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 602 rt->rt_rmx.rmx_sendpipe, 603 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 604 printf("\tssthresh %10lu%c rtt %10ld%c " 605 "rttvar %10ld%c\n", 606 rt->rt_rmx.rmx_ssthresh, 607 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 608 rt->rt_rmx.rmx_rtt, 609 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 610 rt->rt_rmx.rmx_rttvar, 611 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 612 } 613 614 } 615 616 char * 617 routename(in) 618 u_int32_t in; 619 { 620 char *cp; 621 static char line[MAXHOSTNAMELEN + 1]; 622 struct hostent *hp; 623 static char domain[MAXHOSTNAMELEN + 1]; 624 static int first = 1; 625 626 if (first) { 627 first = 0; 628 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 629 domain[sizeof(domain) - 1] = '\0'; 630 if ((cp = strchr(domain, '.'))) 631 (void)strcpy(domain, cp + 1); 632 else 633 domain[0] = 0; 634 } else 635 domain[0] = 0; 636 } 637 cp = 0; 638 if (!nflag) { 639 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 640 AF_INET); 641 if (hp) { 642 if ((cp = strchr(hp->h_name, '.')) && 643 !strcmp(cp + 1, domain)) 644 *cp = 0; 645 cp = hp->h_name; 646 } 647 } 648 if (cp) { 649 strncpy(line, cp, sizeof(line) - 1); 650 line[sizeof(line) - 1] = '\0'; 651 } else { 652 #define C(x) ((x) & 0xff) 653 in = ntohl(in); 654 snprintf(line, sizeof line, "%u.%u.%u.%u", 655 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 656 } 657 return (line); 658 } 659 660 static u_long 661 forgemask(a) 662 u_long a; 663 { 664 u_long m; 665 666 if (IN_CLASSA(a)) 667 m = IN_CLASSA_NET; 668 else if (IN_CLASSB(a)) 669 m = IN_CLASSB_NET; 670 else 671 m = IN_CLASSC_NET; 672 return (m); 673 } 674 675 static void 676 domask(dst, dlen, addr, mask) 677 char *dst; 678 size_t dlen; 679 u_long addr, mask; 680 { 681 int b, i; 682 683 if (!mask || (forgemask(addr) == mask)) { 684 *dst = '\0'; 685 return; 686 } 687 i = 0; 688 for (b = 0; b < 32; b++) 689 if (mask & (1 << b)) { 690 int bb; 691 692 i = b; 693 for (bb = b+1; bb < 32; bb++) 694 if (!(mask & (1 << bb))) { 695 i = -1; /* noncontig */ 696 break; 697 } 698 break; 699 } 700 if (i == -1) 701 (void)snprintf(dst, dlen, "&0x%lx", mask); 702 else 703 (void)snprintf(dst, dlen, "/%d", 32-i); 704 } 705 706 /* 707 * Return the name of the network whose address is given. 708 * The address is assumed to be that of a net or subnet, not a host. 709 */ 710 char * 711 netname(in, mask) 712 u_int32_t in, mask; 713 { 714 char *cp = 0; 715 static char line[MAXHOSTNAMELEN + 4]; 716 struct netent *np = 0; 717 u_int32_t net, omask; 718 u_int32_t i; 719 int subnetshift; 720 721 i = ntohl(in); 722 omask = mask = ntohl(mask); 723 if (!nflag && i != INADDR_ANY) { 724 if (mask == INADDR_ANY) { 725 switch (mask = forgemask(i)) { 726 case IN_CLASSA_NET: 727 subnetshift = 8; 728 break; 729 case IN_CLASSB_NET: 730 subnetshift = 8; 731 break; 732 case IN_CLASSC_NET: 733 subnetshift = 4; 734 break; 735 default: 736 abort(); 737 } 738 /* 739 * If there are more bits than the standard mask 740 * would suggest, subnets must be in use. 741 * Guess at the subnet mask, assuming reasonable 742 * width subnet fields. 743 */ 744 while (i &~ mask) 745 mask = (long)mask >> subnetshift; 746 } 747 net = i & mask; 748 /* 749 * Note: shift the hosts bits out in octet units, since 750 * not all versions of getnetbyaddr() do this for us (e.g. 751 * the current `etc/networks' parser). 752 */ 753 while ((mask & 0xff) == 0) 754 mask >>= 8, net >>= 8; 755 np = getnetbyaddr(net, AF_INET); 756 if (np) 757 cp = np->n_name; 758 } 759 if (cp) 760 strncpy(line, cp, sizeof(line) - 1); 761 else if ((i & 0xffffff) == 0) 762 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 763 else if ((i & 0xffff) == 0) 764 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 765 , C(i >> 16)); 766 else if ((i & 0xff) == 0) 767 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 768 C(i >> 16), C(i >> 8)); 769 else 770 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 771 C(i >> 16), C(i >> 8), C(i)); 772 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 773 return (line); 774 } 775 776 #ifdef INET6 777 char * 778 netname6(in6, mask) 779 struct in6_addr *in6; 780 struct in6_addr *mask; 781 { 782 static char line[MAXHOSTNAMELEN + 1]; 783 struct in6_addr net6; 784 u_char *p; 785 u_char *lim; 786 int masklen, final = 0, illegal = 0; 787 int i; 788 789 net6 = *in6; 790 for (i = 0; i < sizeof(net6); i++) 791 net6.s6_addr[i] &= mask->s6_addr[i]; 792 793 masklen = 0; 794 lim = (u_char *)mask + 16; 795 for (p = (u_char *)mask; p < lim; p++) { 796 if (final && *p) { 797 illegal++; 798 continue; 799 } 800 801 switch (*p & 0xff) { 802 case 0xff: 803 masklen += 8; 804 break; 805 case 0xfe: 806 masklen += 7; 807 final++; 808 break; 809 case 0xfc: 810 masklen += 6; 811 final++; 812 break; 813 case 0xf8: 814 masklen += 5; 815 final++; 816 break; 817 case 0xf0: 818 masklen += 4; 819 final++; 820 break; 821 case 0xe0: 822 masklen += 3; 823 final++; 824 break; 825 case 0xc0: 826 masklen += 2; 827 final++; 828 break; 829 case 0x80: 830 masklen += 1; 831 final++; 832 break; 833 case 0x00: 834 final++; 835 break; 836 default: 837 final++; 838 illegal++; 839 break; 840 } 841 } 842 843 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(in6)) 844 return("default"); 845 846 if (illegal) 847 fprintf(stderr, "illegal prefixlen\n"); 848 sprintf(line, "%s/%d", inet_ntop(AF_INET6, &net6, ntop_buf, 849 sizeof(ntop_buf)), 850 masklen); 851 return line; 852 } 853 854 char * 855 routename6(in6) 856 char *in6; 857 { 858 static char line[MAXHOSTNAMELEN + 1]; 859 sprintf(line, "%s", inet_ntop(AF_INET6, in6, ntop_buf, 860 sizeof(ntop_buf))); 861 return line; 862 } 863 #endif /*INET6*/ 864 865 /* 866 * Print routing statistics 867 */ 868 void 869 rt_stats(off) 870 u_long off; 871 { 872 struct rtstat rtstat; 873 874 if (off == 0) { 875 printf("rtstat: symbol not in namelist\n"); 876 return; 877 } 878 kread(off, (char *)&rtstat, sizeof (rtstat)); 879 printf("routing:\n"); 880 printf("\t%u bad routing redirect%s\n", 881 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 882 printf("\t%u dynamically created route%s\n", 883 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 884 printf("\t%u new gateway%s due to redirects\n", 885 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 886 printf("\t%u destination%s found unreachable\n", 887 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 888 printf("\t%u use%s of a wildcard route\n", 889 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 890 } 891 short ns_nullh[] = {0,0,0}; 892 short ns_bh[] = {-1,-1,-1}; 893 894 char * 895 ns_print(sa) 896 struct sockaddr *sa; 897 { 898 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 899 struct ns_addr work; 900 union { 901 union ns_net net_e; 902 u_long long_e; 903 } net; 904 u_short port; 905 static char mybuf[50], cport[10], chost[25]; 906 char *host = ""; 907 char *p; 908 u_char *q; 909 910 work = sns->sns_addr; 911 port = ntohs(work.x_port); 912 work.x_port = 0; 913 net.net_e = work.x_net; 914 if (ns_nullhost(work) && net.long_e == 0) { 915 if (port ) { 916 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 917 upHex(mybuf); 918 } else 919 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 920 return (mybuf); 921 } 922 923 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 924 host = "any"; 925 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 926 host = "*"; 927 } else { 928 q = work.x_host.c_host; 929 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 930 q[0], q[1], q[2], q[3], q[4], q[5]); 931 for (p = chost; *p == '0' && p < chost + 12; p++) 932 continue; 933 host = p; 934 } 935 if (port) 936 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 937 else 938 *cport = 0; 939 940 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 941 host, cport); 942 upHex(mybuf); 943 return (mybuf); 944 } 945 946 char * 947 ns_phost(sa) 948 struct sockaddr *sa; 949 { 950 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 951 struct sockaddr_ns work; 952 static union ns_net ns_zeronet; 953 char *p; 954 955 work = *sns; 956 work.sns_addr.x_port = 0; 957 work.sns_addr.x_net = ns_zeronet; 958 959 p = ns_print((struct sockaddr *)&work); 960 if (strncmp("0H.", p, 3) == 0) 961 p += 3; 962 return (p); 963 } 964 965 void 966 upHex(p0) 967 char *p0; 968 { 969 char *p = p0; 970 971 for (; *p; p++) 972 switch (*p) { 973 case 'a': 974 case 'b': 975 case 'c': 976 case 'd': 977 case 'e': 978 case 'f': 979 *p += ('A' - 'a'); 980 } 981 } 982
Indexes created Wed Sep 24 05:09:52 GMT 2025