route.c revision 1.44
1 /* $NetBSD: route.c,v 1.44 1999/12/13 15:22:55 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 1.44 1999/12/13 15:22:55 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 sockaddr_in6 *, struct in6_addr *)); 144 #endif 145 146 /* 147 * Print routing tables. 148 */ 149 void 150 routepr(rtree) 151 u_long rtree; 152 { 153 struct radix_node_head *rnh, head; 154 int i; 155 156 printf("Routing tables\n"); 157 158 if (Aflag == 0 && NewTree) 159 ntreestuff(); 160 else { 161 if (rtree == 0) { 162 printf("rt_tables: symbol not in namelist\n"); 163 return; 164 } 165 166 kget(rtree, rt_tables); 167 for (i = 0; i <= AF_MAX; i++) { 168 if ((rnh = rt_tables[i]) == 0) 169 continue; 170 kget(rnh, head); 171 if (i == AF_UNSPEC) { 172 if (Aflag && af == 0) { 173 printf("Netmasks:\n"); 174 p_tree(head.rnh_treetop); 175 } 176 } else if (af == AF_UNSPEC || af == i) { 177 pr_family(i); 178 do_rtent = 1; 179 pr_rthdr(i); 180 p_tree(head.rnh_treetop); 181 } 182 } 183 } 184 } 185 186 /* 187 * Print address family header before a section of the routing table. 188 */ 189 void 190 pr_family(af) 191 int af; 192 { 193 char *afname; 194 195 switch (af) { 196 case AF_INET: 197 afname = "Internet"; 198 break; 199 #ifdef INET6 200 case AF_INET6: 201 afname = "Internet6"; 202 break; 203 #endif 204 case AF_NS: 205 afname = "XNS"; 206 break; 207 case AF_ISO: 208 afname = "ISO"; 209 break; 210 case AF_APPLETALK: 211 afname = "AppleTalk"; 212 break; 213 case AF_CCITT: 214 afname = "X.25"; 215 break; 216 default: 217 afname = NULL; 218 break; 219 } 220 if (afname) 221 printf("\n%s:\n", afname); 222 else 223 printf("\nProtocol Family %d:\n", af); 224 } 225 226 /* column widths; each followed by one space */ 227 #ifndef INET6 228 #define WID_DST(af) 18 /* width of destination column */ 229 #define WID_GW(af) 18 /* width of gateway column */ 230 #else 231 /* width of destination/gateway column */ 232 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 233 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 29 : 18) : 18) 234 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 25 : 18) : 18) 235 #endif /* INET6 */ 236 237 /* 238 * Print header for routing table columns. 239 */ 240 void 241 pr_rthdr(af) 242 int af; 243 { 244 245 if (Aflag) 246 printf("%-8.8s ","Address"); 247 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 248 WID_DST(af), WID_DST(af), "Destination", 249 WID_GW(af), WID_GW(af), "Gateway", 250 "Flags", "Refs", "Use", "Mtu", "Interface"); 251 } 252 253 static struct sockaddr * 254 kgetsa(dst) 255 struct sockaddr *dst; 256 { 257 258 kget(dst, pt_u.u_sa); 259 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 260 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 261 return (&pt_u.u_sa); 262 } 263 264 static void 265 p_tree(rn) 266 struct radix_node *rn; 267 { 268 269 again: 270 kget(rn, rnode); 271 if (rnode.rn_b < 0) { 272 if (Aflag) 273 printf("%-8.8lx ", (u_long) rn); 274 if (rnode.rn_flags & RNF_ROOT) { 275 if (Aflag) 276 printf("(root node)%s", 277 rnode.rn_dupedkey ? " =>\n" : "\n"); 278 } else if (do_rtent) { 279 kget(rn, rtentry); 280 p_rtentry(&rtentry); 281 if (Aflag) 282 p_rtnode(); 283 } else { 284 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 285 NULL, 0, 44); 286 putchar('\n'); 287 } 288 if ((rn = rnode.rn_dupedkey) != NULL) 289 goto again; 290 } else { 291 if (Aflag && do_rtent) { 292 printf("%-8.8lx ", (u_long) rn); 293 p_rtnode(); 294 } 295 rn = rnode.rn_r; 296 p_tree(rnode.rn_l); 297 p_tree(rn); 298 } 299 } 300 301 static void 302 p_rtnode() 303 { 304 struct radix_mask *rm = rnode.rn_mklist; 305 char nbuf[20]; 306 307 if (rnode.rn_b < 0) { 308 if (rnode.rn_mask) { 309 printf("\t mask "); 310 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 311 NULL, 0, -1); 312 } else if (rm == 0) 313 return; 314 } else { 315 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 316 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 317 (u_long) rnode.rn_r); 318 } 319 while (rm) { 320 kget(rm, rmask); 321 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 322 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 323 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 324 if (rmask.rm_flags & RNF_NORMAL) { 325 struct radix_node rnode_aux; 326 printf(" <normal>, "); 327 kget(rmask.rm_leaf, rnode_aux); 328 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 329 NULL, 0, -1); 330 } else 331 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 332 NULL, 0, -1); 333 putchar('}'); 334 if ((rm = rmask.rm_mklist) != NULL) 335 printf(" ->"); 336 } 337 putchar('\n'); 338 } 339 340 static void 341 ntreestuff() 342 { 343 size_t needed; 344 int mib[6]; 345 char *buf, *next, *lim; 346 struct rt_msghdr *rtm; 347 348 mib[0] = CTL_NET; 349 mib[1] = PF_ROUTE; 350 mib[2] = 0; 351 mib[3] = 0; 352 mib[4] = NET_RT_DUMP; 353 mib[5] = 0; 354 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 355 err(1, "route sysctl estimate"); 356 if ((buf = malloc(needed)) == 0) 357 errx(1, "out of space"); 358 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 359 err(1, "sysctl of routing table"); 360 lim = buf + needed; 361 for (next = buf; next < lim; next += rtm->rtm_msglen) { 362 rtm = (struct rt_msghdr *)next; 363 np_rtentry(rtm); 364 } 365 } 366 367 static void 368 np_rtentry(rtm) 369 struct rt_msghdr *rtm; 370 { 371 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 372 #ifdef notdef 373 static int masks_done, banner_printed; 374 #endif 375 static int old_af; 376 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 377 378 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 379 return; 380 #ifdef notdef 381 /* for the moment, netmasks are skipped over */ 382 if (!banner_printed) { 383 printf("Netmasks:\n"); 384 banner_printed = 1; 385 } 386 if (masks_done == 0) { 387 if (rtm->rtm_addrs != RTA_DST ) { 388 masks_done = 1; 389 af = sa->sa_family; 390 } 391 } else 392 #endif 393 af = sa->sa_family; 394 if (af != old_af) { 395 pr_family(af); 396 old_af = af; 397 } 398 if (rtm->rtm_addrs == RTA_DST) 399 p_sockaddr(sa, NULL, 0, 36); 400 else { 401 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 402 #if 0 403 if (sa->sa_len == 0) 404 sa->sa_len = sizeof(long); 405 #endif 406 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 407 p_sockaddr(sa, NULL, 0, 18); 408 } 409 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 410 putchar('\n'); 411 } 412 413 static void 414 p_sockaddr(sa, mask, flags, width) 415 const struct sockaddr *sa, *mask; 416 int flags, width; 417 { 418 char workbuf[128], *cplim; 419 char *cp = workbuf; 420 421 switch(sa->sa_family) { 422 case AF_INET: 423 { 424 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 425 426 if (sin->sin_addr.s_addr == INADDR_ANY) 427 cp = "default"; 428 else if (flags & RTF_HOST) 429 cp = routename(sin->sin_addr.s_addr); 430 else if (mask) 431 cp = netname(sin->sin_addr.s_addr, 432 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 433 else 434 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 435 break; 436 } 437 438 #ifdef INET6 439 case AF_INET6: 440 { 441 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 442 #ifdef KAME_SCOPEID 443 struct in6_addr *in6 = &sa6->sin6_addr; 444 445 /* 446 * XXX: This is a special workaround for KAME kernels. 447 * sin6_scope_id field of SA should be set in the future. 448 */ 449 if (IN6_IS_ADDR_LINKLOCAL(in6) || 450 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 451 /* XXX: override is ok? */ 452 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 453 *(u_short *)&in6->s6_addr[2] = 0; 454 } 455 #endif 456 457 if (flags & RTF_HOST) 458 cp = routename6(sa6); 459 else if (mask) { 460 cp = netname6(sa6, 461 &((struct sockaddr_in6 *)mask)->sin6_addr); 462 } else 463 cp = netname6(sa6, NULL); 464 break; 465 } 466 #endif 467 468 #ifndef SMALL 469 case AF_APPLETALK: 470 case 0: 471 { 472 if (!(flags & RTF_HOST) && mask) 473 cp = atalk_print2(sa,mask,11); 474 else 475 cp = atalk_print(sa,11); 476 break; 477 } 478 case AF_NS: 479 cp = ns_print((struct sockaddr *)sa); 480 break; 481 #endif 482 483 case AF_LINK: 484 { 485 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 486 487 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 488 sdl->sdl_slen == 0) 489 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 490 sdl->sdl_index); 491 else switch (sdl->sdl_type) { 492 case IFT_FDDI: 493 case IFT_ETHER: 494 { 495 int i; 496 u_char *lla = (u_char *)sdl->sdl_data + 497 sdl->sdl_nlen; 498 499 cplim = ""; 500 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 501 /* XXX */ 502 cp += sprintf(cp, "%s%02x", cplim, *lla); 503 cplim = ":"; 504 } 505 cp = workbuf; 506 break; 507 } 508 default: 509 cp = link_ntoa(sdl); 510 break; 511 } 512 break; 513 } 514 515 default: 516 { 517 u_char *s = (u_char *)sa->sa_data, *slim; 518 519 slim = sa->sa_len + (u_char *) sa; 520 cplim = cp + sizeof(workbuf) - 6; 521 cp += sprintf(cp, "(%d)", sa->sa_family); 522 while (s < slim && cp < cplim) { 523 cp += sprintf(cp, " %02x", *s++); 524 if (s < slim) 525 cp += sprintf(cp, "%02x", *s++); 526 } 527 cp = workbuf; 528 } 529 } 530 if (width < 0 ) 531 printf("%s ", cp); 532 else { 533 if (nflag) 534 printf("%-*s ", width, cp); 535 else 536 printf("%-*.*s ", width, width, cp); 537 } 538 } 539 540 static void 541 p_flags(f, format) 542 int f; 543 char *format; 544 { 545 char name[33], *flags; 546 struct bits *p = bits; 547 548 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 549 if (p->b_mask & f) 550 *flags++ = p->b_val; 551 *flags = '\0'; 552 printf(format, name); 553 } 554 555 static struct sockaddr *sockcopy __P((struct sockaddr *, 556 union sockaddr_union *)); 557 558 /* 559 * copy a sockaddr into an allocated region, allocate at least sockaddr 560 * bytes and zero unused 561 */ 562 static struct sockaddr * 563 sockcopy(sp, dp) 564 struct sockaddr *sp; 565 union sockaddr_union *dp; 566 { 567 int len; 568 569 if (sp == 0 || sp->sa_len == 0) 570 (void)memset(dp, 0, sizeof (*sp)); 571 else { 572 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 573 (void)memcpy(dp, sp, len); 574 } 575 return ((struct sockaddr *)dp); 576 } 577 578 static void 579 p_rtentry(rt) 580 struct rtentry *rt; 581 { 582 static struct ifnet ifnet, *lastif; 583 union sockaddr_union addr_un, mask_un; 584 struct sockaddr *addr, *mask; 585 int af; 586 587 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 588 return; 589 590 memset(&addr_un, 0, sizeof(addr_un)); 591 memset(&mask_un, 0, sizeof(mask_un)); 592 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 593 af = addr->sa_family; 594 if (rt_mask(rt)) 595 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 596 else 597 mask = sockcopy(NULL, &mask_un); 598 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 599 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 600 p_flags(rt->rt_flags, "%-6.6s "); 601 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 602 if (rt->rt_rmx.rmx_mtu) 603 printf("%6lu", rt->rt_rmx.rmx_mtu); 604 else 605 printf("%6s", "-"); 606 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 607 if (rt->rt_ifp) { 608 if (rt->rt_ifp != lastif) { 609 kget(rt->rt_ifp, ifnet); 610 lastif = rt->rt_ifp; 611 } 612 printf(" %.16s%s", ifnet.if_xname, 613 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 614 } 615 putchar('\n'); 616 if (vflag) { 617 printf("\texpire %10lu%c recvpipe %10ld%c " 618 "sendpipe %10ld%c\n", 619 rt->rt_rmx.rmx_expire, 620 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 621 rt->rt_rmx.rmx_recvpipe, 622 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 623 rt->rt_rmx.rmx_sendpipe, 624 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 625 printf("\tssthresh %10lu%c rtt %10ld%c " 626 "rttvar %10ld%c\n", 627 rt->rt_rmx.rmx_ssthresh, 628 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 629 rt->rt_rmx.rmx_rtt, 630 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 631 rt->rt_rmx.rmx_rttvar, 632 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 633 } 634 635 } 636 637 char * 638 routename(in) 639 u_int32_t in; 640 { 641 char *cp; 642 static char line[MAXHOSTNAMELEN + 1]; 643 struct hostent *hp; 644 static char domain[MAXHOSTNAMELEN + 1]; 645 static int first = 1; 646 647 if (first) { 648 first = 0; 649 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 650 domain[sizeof(domain) - 1] = '\0'; 651 if ((cp = strchr(domain, '.'))) 652 (void)strcpy(domain, cp + 1); 653 else 654 domain[0] = 0; 655 } else 656 domain[0] = 0; 657 } 658 cp = 0; 659 if (!nflag) { 660 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 661 AF_INET); 662 if (hp) { 663 if ((cp = strchr(hp->h_name, '.')) && 664 !strcmp(cp + 1, domain)) 665 *cp = 0; 666 cp = hp->h_name; 667 } 668 } 669 if (cp) { 670 strncpy(line, cp, sizeof(line) - 1); 671 line[sizeof(line) - 1] = '\0'; 672 } else { 673 #define C(x) ((x) & 0xff) 674 in = ntohl(in); 675 snprintf(line, sizeof line, "%u.%u.%u.%u", 676 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 677 } 678 return (line); 679 } 680 681 static u_long 682 forgemask(a) 683 u_long a; 684 { 685 u_long m; 686 687 if (IN_CLASSA(a)) 688 m = IN_CLASSA_NET; 689 else if (IN_CLASSB(a)) 690 m = IN_CLASSB_NET; 691 else 692 m = IN_CLASSC_NET; 693 return (m); 694 } 695 696 static void 697 domask(dst, dlen, addr, mask) 698 char *dst; 699 size_t dlen; 700 u_long addr, mask; 701 { 702 int b, i; 703 704 if (!mask || (forgemask(addr) == mask)) { 705 *dst = '\0'; 706 return; 707 } 708 i = 0; 709 for (b = 0; b < 32; b++) 710 if (mask & (1 << b)) { 711 int bb; 712 713 i = b; 714 for (bb = b+1; bb < 32; bb++) 715 if (!(mask & (1 << bb))) { 716 i = -1; /* noncontig */ 717 break; 718 } 719 break; 720 } 721 if (i == -1) 722 (void)snprintf(dst, dlen, "&0x%lx", mask); 723 else 724 (void)snprintf(dst, dlen, "/%d", 32-i); 725 } 726 727 /* 728 * Return the name of the network whose address is given. 729 * The address is assumed to be that of a net or subnet, not a host. 730 */ 731 char * 732 netname(in, mask) 733 u_int32_t in, mask; 734 { 735 char *cp = 0; 736 static char line[MAXHOSTNAMELEN + 4]; 737 struct netent *np = 0; 738 u_int32_t net, omask; 739 u_int32_t i; 740 int subnetshift; 741 742 i = ntohl(in); 743 omask = mask = ntohl(mask); 744 if (!nflag && i != INADDR_ANY) { 745 if (mask == INADDR_ANY) { 746 switch (mask = forgemask(i)) { 747 case IN_CLASSA_NET: 748 subnetshift = 8; 749 break; 750 case IN_CLASSB_NET: 751 subnetshift = 8; 752 break; 753 case IN_CLASSC_NET: 754 subnetshift = 4; 755 break; 756 default: 757 abort(); 758 } 759 /* 760 * If there are more bits than the standard mask 761 * would suggest, subnets must be in use. 762 * Guess at the subnet mask, assuming reasonable 763 * width subnet fields. 764 */ 765 while (i &~ mask) 766 mask = (long)mask >> subnetshift; 767 } 768 net = i & mask; 769 /* 770 * Note: shift the hosts bits out in octet units, since 771 * not all versions of getnetbyaddr() do this for us (e.g. 772 * the current `etc/networks' parser). 773 */ 774 while ((mask & 0xff) == 0) 775 mask >>= 8, net >>= 8; 776 np = getnetbyaddr(net, AF_INET); 777 if (np) 778 cp = np->n_name; 779 } 780 if (cp) 781 strncpy(line, cp, sizeof(line) - 1); 782 else if ((i & 0xffffff) == 0) 783 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 784 else if ((i & 0xffff) == 0) 785 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 786 , C(i >> 16)); 787 else if ((i & 0xff) == 0) 788 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 789 C(i >> 16), C(i >> 8)); 790 else 791 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 792 C(i >> 16), C(i >> 8), C(i)); 793 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 794 return (line); 795 } 796 797 #ifdef INET6 798 char * 799 netname6(sa6, mask) 800 struct sockaddr_in6 *sa6; 801 struct in6_addr *mask; 802 { 803 static char line[NI_MAXHOST]; 804 u_char *p; 805 u_char *lim; 806 int masklen, final = 0, illegal = 0; 807 #ifdef KAME_SCOPEID 808 int flag = NI_WITHSCOPEID; 809 #else 810 int flag = 0; 811 #endif 812 int error; 813 814 if (mask) { 815 masklen = 0; 816 lim = (u_char *)mask + 16; 817 for (p = (u_char *)mask; p < lim; p++) { 818 if (final && *p) { 819 illegal++; 820 continue; 821 } 822 823 switch (*p & 0xff) { 824 case 0xff: 825 masklen += 8; 826 break; 827 case 0xfe: 828 masklen += 7; 829 final++; 830 break; 831 case 0xfc: 832 masklen += 6; 833 final++; 834 break; 835 case 0xf8: 836 masklen += 5; 837 final++; 838 break; 839 case 0xf0: 840 masklen += 4; 841 final++; 842 break; 843 case 0xe0: 844 masklen += 3; 845 final++; 846 break; 847 case 0xc0: 848 masklen += 2; 849 final++; 850 break; 851 case 0x80: 852 masklen += 1; 853 final++; 854 break; 855 case 0x00: 856 final++; 857 break; 858 default: 859 final++; 860 illegal++; 861 break; 862 } 863 } 864 } 865 else 866 masklen = 128; 867 868 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 869 return("default"); 870 871 if (illegal) 872 fprintf(stderr, "illegal prefixlen\n"); 873 if (nflag) 874 flag |= NI_NUMERICHOST; 875 error = getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, 876 line, sizeof(line), NULL, 0, flag); 877 if (error) 878 strcpy(line, "invalid"); 879 880 if (nflag) 881 sprintf(&line[strlen(line)], "/%d", masklen); 882 883 return line; 884 } 885 886 char * 887 routename6(sa6) 888 struct sockaddr_in6 *sa6; 889 { 890 static char line[NI_MAXHOST]; 891 #ifdef KAME_SCOPEID 892 int flag = NI_WITHSCOPEID; 893 #else 894 int flag = 0; 895 #endif 896 /* use local variable for safety */ 897 struct sockaddr_in6 sa6_local; 898 int error; 899 900 memset(&sa6_local, 0, sizeof(sa6_local)); 901 sa6_local.sin6_family = AF_INET6; 902 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 903 sa6_local.sin6_addr = sa6->sin6_addr; 904 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 905 906 if (nflag) 907 flag |= NI_NUMERICHOST; 908 909 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 910 line, sizeof(line), NULL, 0, flag); 911 if (error) 912 strcpy(line, "invalid"); 913 914 return line; 915 } 916 #endif /*INET6*/ 917 918 /* 919 * Print routing statistics 920 */ 921 void 922 rt_stats(off) 923 u_long off; 924 { 925 struct rtstat rtstat; 926 927 if (off == 0) { 928 printf("rtstat: symbol not in namelist\n"); 929 return; 930 } 931 kread(off, (char *)&rtstat, sizeof (rtstat)); 932 printf("routing:\n"); 933 printf("\t%u bad routing redirect%s\n", 934 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 935 printf("\t%u dynamically created route%s\n", 936 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 937 printf("\t%u new gateway%s due to redirects\n", 938 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 939 printf("\t%u destination%s found unreachable\n", 940 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 941 printf("\t%u use%s of a wildcard route\n", 942 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 943 } 944 short ns_nullh[] = {0,0,0}; 945 short ns_bh[] = {-1,-1,-1}; 946 947 char * 948 ns_print(sa) 949 struct sockaddr *sa; 950 { 951 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 952 struct ns_addr work; 953 union { 954 union ns_net net_e; 955 u_long long_e; 956 } net; 957 u_short port; 958 static char mybuf[50], cport[10], chost[25]; 959 char *host = ""; 960 char *p; 961 u_char *q; 962 963 work = sns->sns_addr; 964 port = ntohs(work.x_port); 965 work.x_port = 0; 966 net.net_e = work.x_net; 967 if (ns_nullhost(work) && net.long_e == 0) { 968 if (port ) { 969 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 970 upHex(mybuf); 971 } else 972 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 973 return (mybuf); 974 } 975 976 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 977 host = "any"; 978 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 979 host = "*"; 980 } else { 981 q = work.x_host.c_host; 982 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 983 q[0], q[1], q[2], q[3], q[4], q[5]); 984 for (p = chost; *p == '0' && p < chost + 12; p++) 985 continue; 986 host = p; 987 } 988 if (port) 989 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 990 else 991 *cport = 0; 992 993 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 994 host, cport); 995 upHex(mybuf); 996 return (mybuf); 997 } 998 999 char * 1000 ns_phost(sa) 1001 struct sockaddr *sa; 1002 { 1003 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1004 struct sockaddr_ns work; 1005 static union ns_net ns_zeronet; 1006 char *p; 1007 1008 work = *sns; 1009 work.sns_addr.x_port = 0; 1010 work.sns_addr.x_net = ns_zeronet; 1011 1012 p = ns_print((struct sockaddr *)&work); 1013 if (strncmp("0H.", p, 3) == 0) 1014 p += 3; 1015 return (p); 1016 } 1017 1018 void 1019 upHex(p0) 1020 char *p0; 1021 { 1022 char *p = p0; 1023 1024 for (; *p; p++) 1025 switch (*p) { 1026 case 'a': 1027 case 'b': 1028 case 'c': 1029 case 'd': 1030 case 'e': 1031 case 'f': 1032 *p += ('A' - 'a'); 1033 } 1034 } 1035
Indexes created Wed Sep 24 15:09:51 GMT 2025