route.c revision 1.45
1 /* $NetBSD: route.c,v 1.45 2000/01/07 04:49:11 sommerfeld 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 1.45 2000/01/07 04:49:11 sommerfeld 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 (mask != NULL) && 428 (((struct sockaddr_in *)mask)->sin_addr.s_addr == 0)) 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 sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 444 #ifdef KAME_SCOPEID 445 struct in6_addr *in6 = &sa6->sin6_addr; 446 447 /* 448 * XXX: This is a special workaround for KAME kernels. 449 * sin6_scope_id field of SA should be set in the future. 450 */ 451 if (IN6_IS_ADDR_LINKLOCAL(in6) || 452 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 453 /* XXX: override is ok? */ 454 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 455 *(u_short *)&in6->s6_addr[2] = 0; 456 } 457 #endif 458 459 if (flags & RTF_HOST) 460 cp = routename6(sa6); 461 else if (mask) { 462 cp = netname6(sa6, 463 &((struct sockaddr_in6 *)mask)->sin6_addr); 464 } else 465 cp = netname6(sa6, NULL); 466 break; 467 } 468 #endif 469 470 #ifndef SMALL 471 case AF_APPLETALK: 472 case 0: 473 { 474 if (!(flags & RTF_HOST) && mask) 475 cp = atalk_print2(sa,mask,11); 476 else 477 cp = atalk_print(sa,11); 478 break; 479 } 480 case AF_NS: 481 cp = ns_print((struct sockaddr *)sa); 482 break; 483 #endif 484 485 case AF_LINK: 486 { 487 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 488 489 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 490 sdl->sdl_slen == 0) 491 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 492 sdl->sdl_index); 493 else switch (sdl->sdl_type) { 494 case IFT_FDDI: 495 case IFT_ETHER: 496 { 497 int i; 498 u_char *lla = (u_char *)sdl->sdl_data + 499 sdl->sdl_nlen; 500 501 cplim = ""; 502 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 503 /* XXX */ 504 cp += sprintf(cp, "%s%02x", cplim, *lla); 505 cplim = ":"; 506 } 507 cp = workbuf; 508 break; 509 } 510 default: 511 cp = link_ntoa(sdl); 512 break; 513 } 514 break; 515 } 516 517 default: 518 { 519 u_char *s = (u_char *)sa->sa_data, *slim; 520 521 slim = sa->sa_len + (u_char *) sa; 522 cplim = cp + sizeof(workbuf) - 6; 523 cp += sprintf(cp, "(%d)", sa->sa_family); 524 while (s < slim && cp < cplim) { 525 cp += sprintf(cp, " %02x", *s++); 526 if (s < slim) 527 cp += sprintf(cp, "%02x", *s++); 528 } 529 cp = workbuf; 530 } 531 } 532 if (width < 0 ) 533 printf("%s ", cp); 534 else { 535 if (nflag) 536 printf("%-*s ", width, cp); 537 else 538 printf("%-*.*s ", width, width, cp); 539 } 540 } 541 542 static void 543 p_flags(f, format) 544 int f; 545 char *format; 546 { 547 char name[33], *flags; 548 struct bits *p = bits; 549 550 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 551 if (p->b_mask & f) 552 *flags++ = p->b_val; 553 *flags = '\0'; 554 printf(format, name); 555 } 556 557 static struct sockaddr *sockcopy __P((struct sockaddr *, 558 union sockaddr_union *)); 559 560 /* 561 * copy a sockaddr into an allocated region, allocate at least sockaddr 562 * bytes and zero unused 563 */ 564 static struct sockaddr * 565 sockcopy(sp, dp) 566 struct sockaddr *sp; 567 union sockaddr_union *dp; 568 { 569 int len; 570 571 if (sp == 0 || sp->sa_len == 0) 572 (void)memset(dp, 0, sizeof (*sp)); 573 else { 574 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 575 (void)memcpy(dp, sp, len); 576 } 577 return ((struct sockaddr *)dp); 578 } 579 580 static void 581 p_rtentry(rt) 582 struct rtentry *rt; 583 { 584 static struct ifnet ifnet, *lastif; 585 union sockaddr_union addr_un, mask_un; 586 struct sockaddr *addr, *mask; 587 int af; 588 589 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 590 return; 591 592 memset(&addr_un, 0, sizeof(addr_un)); 593 memset(&mask_un, 0, sizeof(mask_un)); 594 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 595 af = addr->sa_family; 596 if (rt_mask(rt)) 597 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 598 else 599 mask = sockcopy(NULL, &mask_un); 600 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 601 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 602 p_flags(rt->rt_flags, "%-6.6s "); 603 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 604 if (rt->rt_rmx.rmx_mtu) 605 printf("%6lu", rt->rt_rmx.rmx_mtu); 606 else 607 printf("%6s", "-"); 608 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 609 if (rt->rt_ifp) { 610 if (rt->rt_ifp != lastif) { 611 kget(rt->rt_ifp, ifnet); 612 lastif = rt->rt_ifp; 613 } 614 printf(" %.16s%s", ifnet.if_xname, 615 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 616 } 617 putchar('\n'); 618 if (vflag) { 619 printf("\texpire %10lu%c recvpipe %10ld%c " 620 "sendpipe %10ld%c\n", 621 rt->rt_rmx.rmx_expire, 622 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 623 rt->rt_rmx.rmx_recvpipe, 624 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 625 rt->rt_rmx.rmx_sendpipe, 626 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 627 printf("\tssthresh %10lu%c rtt %10ld%c " 628 "rttvar %10ld%c\n", 629 rt->rt_rmx.rmx_ssthresh, 630 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 631 rt->rt_rmx.rmx_rtt, 632 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 633 rt->rt_rmx.rmx_rttvar, 634 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 635 } 636 637 } 638 639 char * 640 routename(in) 641 u_int32_t in; 642 { 643 char *cp; 644 static char line[MAXHOSTNAMELEN + 1]; 645 struct hostent *hp; 646 static char domain[MAXHOSTNAMELEN + 1]; 647 static int first = 1; 648 649 if (first) { 650 first = 0; 651 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 652 domain[sizeof(domain) - 1] = '\0'; 653 if ((cp = strchr(domain, '.'))) 654 (void)strcpy(domain, cp + 1); 655 else 656 domain[0] = 0; 657 } else 658 domain[0] = 0; 659 } 660 cp = 0; 661 if (!nflag) { 662 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 663 AF_INET); 664 if (hp) { 665 if ((cp = strchr(hp->h_name, '.')) && 666 !strcmp(cp + 1, domain)) 667 *cp = 0; 668 cp = hp->h_name; 669 } 670 } 671 if (cp) { 672 strncpy(line, cp, sizeof(line) - 1); 673 line[sizeof(line) - 1] = '\0'; 674 } else { 675 #define C(x) ((x) & 0xff) 676 in = ntohl(in); 677 snprintf(line, sizeof line, "%u.%u.%u.%u", 678 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 679 } 680 return (line); 681 } 682 683 static u_long 684 forgemask(a) 685 u_long a; 686 { 687 u_long m; 688 689 if (IN_CLASSA(a)) 690 m = IN_CLASSA_NET; 691 else if (IN_CLASSB(a)) 692 m = IN_CLASSB_NET; 693 else 694 m = IN_CLASSC_NET; 695 return (m); 696 } 697 698 static void 699 domask(dst, dlen, addr, mask) 700 char *dst; 701 size_t dlen; 702 u_long addr, mask; 703 { 704 int b, i; 705 706 if (!mask || (forgemask(addr) == mask)) { 707 *dst = '\0'; 708 return; 709 } 710 i = 0; 711 for (b = 0; b < 32; b++) 712 if (mask & (1 << b)) { 713 int bb; 714 715 i = b; 716 for (bb = b+1; bb < 32; bb++) 717 if (!(mask & (1 << bb))) { 718 i = -1; /* noncontig */ 719 break; 720 } 721 break; 722 } 723 if (i == -1) 724 (void)snprintf(dst, dlen, "&0x%lx", mask); 725 else 726 (void)snprintf(dst, dlen, "/%d", 32-i); 727 } 728 729 /* 730 * Return the name of the network whose address is given. 731 * The address is assumed to be that of a net or subnet, not a host. 732 */ 733 char * 734 netname(in, mask) 735 u_int32_t in, mask; 736 { 737 char *cp = 0; 738 static char line[MAXHOSTNAMELEN + 4]; 739 struct netent *np = 0; 740 u_int32_t net, omask; 741 u_int32_t i; 742 int subnetshift; 743 744 i = ntohl(in); 745 omask = mask = ntohl(mask); 746 if (!nflag && i != INADDR_ANY) { 747 if (mask == INADDR_ANY) { 748 switch (mask = forgemask(i)) { 749 case IN_CLASSA_NET: 750 subnetshift = 8; 751 break; 752 case IN_CLASSB_NET: 753 subnetshift = 8; 754 break; 755 case IN_CLASSC_NET: 756 subnetshift = 4; 757 break; 758 default: 759 abort(); 760 } 761 /* 762 * If there are more bits than the standard mask 763 * would suggest, subnets must be in use. 764 * Guess at the subnet mask, assuming reasonable 765 * width subnet fields. 766 */ 767 while (i &~ mask) 768 mask = (long)mask >> subnetshift; 769 } 770 net = i & mask; 771 /* 772 * Note: shift the hosts bits out in octet units, since 773 * not all versions of getnetbyaddr() do this for us (e.g. 774 * the current `etc/networks' parser). 775 */ 776 while ((mask & 0xff) == 0) 777 mask >>= 8, net >>= 8; 778 np = getnetbyaddr(net, AF_INET); 779 if (np) 780 cp = np->n_name; 781 } 782 if (cp) 783 strncpy(line, cp, sizeof(line) - 1); 784 else if ((i & 0xffffff) == 0) 785 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 786 else if ((i & 0xffff) == 0) 787 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 788 , C(i >> 16)); 789 else if ((i & 0xff) == 0) 790 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 791 C(i >> 16), C(i >> 8)); 792 else 793 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 794 C(i >> 16), C(i >> 8), C(i)); 795 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 796 return (line); 797 } 798 799 #ifdef INET6 800 char * 801 netname6(sa6, mask) 802 struct sockaddr_in6 *sa6; 803 struct in6_addr *mask; 804 { 805 static char line[NI_MAXHOST]; 806 u_char *p; 807 u_char *lim; 808 int masklen, final = 0, illegal = 0; 809 #ifdef KAME_SCOPEID 810 int flag = NI_WITHSCOPEID; 811 #else 812 int flag = 0; 813 #endif 814 int error; 815 816 if (mask) { 817 masklen = 0; 818 lim = (u_char *)mask + 16; 819 for (p = (u_char *)mask; p < lim; p++) { 820 if (final && *p) { 821 illegal++; 822 continue; 823 } 824 825 switch (*p & 0xff) { 826 case 0xff: 827 masklen += 8; 828 break; 829 case 0xfe: 830 masklen += 7; 831 final++; 832 break; 833 case 0xfc: 834 masklen += 6; 835 final++; 836 break; 837 case 0xf8: 838 masklen += 5; 839 final++; 840 break; 841 case 0xf0: 842 masklen += 4; 843 final++; 844 break; 845 case 0xe0: 846 masklen += 3; 847 final++; 848 break; 849 case 0xc0: 850 masklen += 2; 851 final++; 852 break; 853 case 0x80: 854 masklen += 1; 855 final++; 856 break; 857 case 0x00: 858 final++; 859 break; 860 default: 861 final++; 862 illegal++; 863 break; 864 } 865 } 866 } 867 else 868 masklen = 128; 869 870 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 871 return("default"); 872 873 if (illegal) 874 fprintf(stderr, "illegal prefixlen\n"); 875 if (nflag) 876 flag |= NI_NUMERICHOST; 877 error = getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, 878 line, sizeof(line), NULL, 0, flag); 879 if (error) 880 strcpy(line, "invalid"); 881 882 if (nflag) 883 sprintf(&line[strlen(line)], "/%d", masklen); 884 885 return line; 886 } 887 888 char * 889 routename6(sa6) 890 struct sockaddr_in6 *sa6; 891 { 892 static char line[NI_MAXHOST]; 893 #ifdef KAME_SCOPEID 894 int flag = NI_WITHSCOPEID; 895 #else 896 int flag = 0; 897 #endif 898 /* use local variable for safety */ 899 struct sockaddr_in6 sa6_local; 900 int error; 901 902 memset(&sa6_local, 0, sizeof(sa6_local)); 903 sa6_local.sin6_family = AF_INET6; 904 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 905 sa6_local.sin6_addr = sa6->sin6_addr; 906 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 907 908 if (nflag) 909 flag |= NI_NUMERICHOST; 910 911 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 912 line, sizeof(line), NULL, 0, flag); 913 if (error) 914 strcpy(line, "invalid"); 915 916 return line; 917 } 918 #endif /*INET6*/ 919 920 /* 921 * Print routing statistics 922 */ 923 void 924 rt_stats(off) 925 u_long off; 926 { 927 struct rtstat rtstat; 928 929 if (off == 0) { 930 printf("rtstat: symbol not in namelist\n"); 931 return; 932 } 933 kread(off, (char *)&rtstat, sizeof (rtstat)); 934 printf("routing:\n"); 935 printf("\t%u bad routing redirect%s\n", 936 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 937 printf("\t%u dynamically created route%s\n", 938 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 939 printf("\t%u new gateway%s due to redirects\n", 940 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 941 printf("\t%u destination%s found unreachable\n", 942 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 943 printf("\t%u use%s of a wildcard route\n", 944 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 945 } 946 short ns_nullh[] = {0,0,0}; 947 short ns_bh[] = {-1,-1,-1}; 948 949 char * 950 ns_print(sa) 951 struct sockaddr *sa; 952 { 953 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 954 struct ns_addr work; 955 union { 956 union ns_net net_e; 957 u_long long_e; 958 } net; 959 u_short port; 960 static char mybuf[50], cport[10], chost[25]; 961 char *host = ""; 962 char *p; 963 u_char *q; 964 965 work = sns->sns_addr; 966 port = ntohs(work.x_port); 967 work.x_port = 0; 968 net.net_e = work.x_net; 969 if (ns_nullhost(work) && net.long_e == 0) { 970 if (port ) { 971 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 972 upHex(mybuf); 973 } else 974 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 975 return (mybuf); 976 } 977 978 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 979 host = "any"; 980 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 981 host = "*"; 982 } else { 983 q = work.x_host.c_host; 984 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 985 q[0], q[1], q[2], q[3], q[4], q[5]); 986 for (p = chost; *p == '0' && p < chost + 12; p++) 987 continue; 988 host = p; 989 } 990 if (port) 991 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 992 else 993 *cport = 0; 994 995 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 996 host, cport); 997 upHex(mybuf); 998 return (mybuf); 999 } 1000 1001 char * 1002 ns_phost(sa) 1003 struct sockaddr *sa; 1004 { 1005 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1006 struct sockaddr_ns work; 1007 static union ns_net ns_zeronet; 1008 char *p; 1009 1010 work = *sns; 1011 work.sns_addr.x_port = 0; 1012 work.sns_addr.x_net = ns_zeronet; 1013 1014 p = ns_print((struct sockaddr *)&work); 1015 if (strncmp("0H.", p, 3) == 0) 1016 p += 3; 1017 return (p); 1018 } 1019 1020 void 1021 upHex(p0) 1022 char *p0; 1023 { 1024 char *p = p0; 1025 1026 for (; *p; p++) 1027 switch (*p) { 1028 case 'a': 1029 case 'b': 1030 case 'c': 1031 case 'd': 1032 case 'e': 1033 case 'f': 1034 *p += ('A' - 'a'); 1035 } 1036 } 1037
Indexes created Tue Sep 23 23:09:58 GMT 2025