route.c revision 1.55
1 /* $NetBSD: route.c,v 1.55 2001/04/06 05:10:28 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 1.55 2001/04/06 05:10:28 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_BLACKHOLE,'B' }, 103 { RTF_CLONED, 'c' }, 104 { RTF_PROTO1, '1' }, 105 { RTF_PROTO2, '2' }, 106 { 0 } 107 }; 108 109 /* 110 * XXX we put all of the sockaddr types in here to force the alignment 111 * to be correct. 112 */ 113 static union sockaddr_union { 114 struct sockaddr u_sa; 115 struct sockaddr_in u_in; 116 struct sockaddr_un u_un; 117 struct sockaddr_iso u_iso; 118 struct sockaddr_at u_at; 119 struct sockaddr_dl u_dl; 120 struct sockaddr_ns u_ns; 121 u_short u_data[128]; 122 int u_dummy; /* force word-alignment */ 123 } pt_u; 124 125 int do_rtent = 0; 126 struct rtentry rtentry; 127 struct radix_node rnode; 128 struct radix_mask rmask; 129 130 int NewTree = 0; 131 132 static struct sockaddr *kgetsa __P((struct sockaddr *)); 133 static void p_tree __P((struct radix_node *)); 134 static void p_rtnode __P((void)); 135 static void ntreestuff __P((void)); 136 static void np_rtentry __P((struct rt_msghdr *)); 137 static void p_sockaddr __P((const struct sockaddr *, 138 const struct sockaddr *, int, int)); 139 static void p_flags __P((int)); 140 static void p_rtentry __P((struct rtentry *)); 141 static void ntreestuff __P((void)); 142 static u_long forgemask __P((u_long)); 143 static void domask __P((char *, size_t, u_long, u_long)); 144 145 /* 146 * Print routing tables. 147 */ 148 void 149 routepr(rtree) 150 u_long rtree; 151 { 152 struct radix_node_head *rnh, head; 153 int i; 154 155 printf("Routing tables\n"); 156 157 if (Aflag == 0 && NewTree) 158 ntreestuff(); 159 else { 160 if (rtree == 0) { 161 printf("rt_tables: symbol not in namelist\n"); 162 return; 163 } 164 165 kget(rtree, rt_tables); 166 for (i = 0; i <= AF_MAX; i++) { 167 if ((rnh = rt_tables[i]) == 0) 168 continue; 169 kget(rnh, head); 170 if (i == AF_UNSPEC) { 171 if (Aflag && af == 0) { 172 printf("Netmasks:\n"); 173 p_tree(head.rnh_treetop); 174 } 175 } else if (af == AF_UNSPEC || af == i) { 176 pr_family(i); 177 do_rtent = 1; 178 pr_rthdr(i); 179 p_tree(head.rnh_treetop); 180 } 181 } 182 } 183 } 184 185 /* 186 * Print address family header before a section of the routing table. 187 */ 188 void 189 pr_family(af) 190 int af; 191 { 192 char *afname; 193 194 switch (af) { 195 case AF_INET: 196 afname = "Internet"; 197 break; 198 #ifdef INET6 199 case AF_INET6: 200 afname = "Internet6"; 201 break; 202 #endif 203 case AF_NS: 204 afname = "XNS"; 205 break; 206 case AF_ISO: 207 afname = "ISO"; 208 break; 209 case AF_APPLETALK: 210 afname = "AppleTalk"; 211 break; 212 case AF_CCITT: 213 afname = "X.25"; 214 break; 215 default: 216 afname = NULL; 217 break; 218 } 219 if (afname) 220 printf("\n%s:\n", afname); 221 else 222 printf("\nProtocol Family %d:\n", af); 223 } 224 225 /* column widths; each followed by one space */ 226 #ifndef INET6 227 #define WID_DST(af) 18 /* width of destination column */ 228 #define WID_GW(af) 18 /* width of gateway column */ 229 #else 230 /* width of destination/gateway column */ 231 #ifdef KAME_SCOPEID 232 /* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 */ 233 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 34 : 18) : 18) 234 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18) 235 #else 236 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 237 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 29 : 18) : 18) 238 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 25 : 18) : 18) 239 #endif 240 #endif /* INET6 */ 241 242 /* 243 * Print header for routing table columns. 244 */ 245 void 246 pr_rthdr(af) 247 int af; 248 { 249 250 if (Aflag) 251 printf("%-8.8s ","Address"); 252 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 253 WID_DST(af), WID_DST(af), "Destination", 254 WID_GW(af), WID_GW(af), "Gateway", 255 "Flags", "Refs", "Use", "Mtu", "Interface"); 256 } 257 258 static struct sockaddr * 259 kgetsa(dst) 260 struct sockaddr *dst; 261 { 262 263 kget(dst, pt_u.u_sa); 264 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 265 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 266 return (&pt_u.u_sa); 267 } 268 269 static void 270 p_tree(rn) 271 struct radix_node *rn; 272 { 273 274 again: 275 kget(rn, rnode); 276 if (rnode.rn_b < 0) { 277 if (Aflag) 278 printf("%-8.8lx ", (u_long) rn); 279 if (rnode.rn_flags & RNF_ROOT) { 280 if (Aflag) 281 printf("(root node)%s", 282 rnode.rn_dupedkey ? " =>\n" : "\n"); 283 } else if (do_rtent) { 284 kget(rn, rtentry); 285 p_rtentry(&rtentry); 286 if (Aflag) 287 p_rtnode(); 288 } else { 289 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 290 NULL, 0, 44); 291 putchar('\n'); 292 } 293 if ((rn = rnode.rn_dupedkey) != NULL) 294 goto again; 295 } else { 296 if (Aflag && do_rtent) { 297 printf("%-8.8lx ", (u_long) rn); 298 p_rtnode(); 299 } 300 rn = rnode.rn_r; 301 p_tree(rnode.rn_l); 302 p_tree(rn); 303 } 304 } 305 306 static void 307 p_rtnode() 308 { 309 struct radix_mask *rm = rnode.rn_mklist; 310 char nbuf[20]; 311 312 if (rnode.rn_b < 0) { 313 if (rnode.rn_mask) { 314 printf("\t mask "); 315 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 316 NULL, 0, -1); 317 } else if (rm == 0) 318 return; 319 } else { 320 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 321 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 322 (u_long) rnode.rn_r); 323 } 324 while (rm) { 325 kget(rm, rmask); 326 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 327 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 328 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 329 if (rmask.rm_flags & RNF_NORMAL) { 330 struct radix_node rnode_aux; 331 printf(" <normal>, "); 332 kget(rmask.rm_leaf, rnode_aux); 333 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 334 NULL, 0, -1); 335 } else 336 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 337 NULL, 0, -1); 338 putchar('}'); 339 if ((rm = rmask.rm_mklist) != NULL) 340 printf(" ->"); 341 } 342 putchar('\n'); 343 } 344 345 static void 346 ntreestuff() 347 { 348 size_t needed; 349 int mib[6]; 350 char *buf, *next, *lim; 351 struct rt_msghdr *rtm; 352 353 mib[0] = CTL_NET; 354 mib[1] = PF_ROUTE; 355 mib[2] = 0; 356 mib[3] = 0; 357 mib[4] = NET_RT_DUMP; 358 mib[5] = 0; 359 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 360 err(1, "route sysctl estimate"); 361 if ((buf = malloc(needed)) == 0) 362 errx(1, "out of space"); 363 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 364 err(1, "sysctl of routing table"); 365 lim = buf + needed; 366 for (next = buf; next < lim; next += rtm->rtm_msglen) { 367 rtm = (struct rt_msghdr *)next; 368 np_rtentry(rtm); 369 } 370 } 371 372 static void 373 np_rtentry(rtm) 374 struct rt_msghdr *rtm; 375 { 376 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 377 #ifdef notdef 378 static int masks_done, banner_printed; 379 #endif 380 static int old_af; 381 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 382 383 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 384 return; 385 #ifdef notdef 386 /* for the moment, netmasks are skipped over */ 387 if (!banner_printed) { 388 printf("Netmasks:\n"); 389 banner_printed = 1; 390 } 391 if (masks_done == 0) { 392 if (rtm->rtm_addrs != RTA_DST ) { 393 masks_done = 1; 394 af = sa->sa_family; 395 } 396 } else 397 #endif 398 af = sa->sa_family; 399 if (af != old_af) { 400 pr_family(af); 401 old_af = af; 402 } 403 if (rtm->rtm_addrs == RTA_DST) 404 p_sockaddr(sa, NULL, 0, 36); 405 else { 406 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 407 #if 0 408 if (sa->sa_len == 0) 409 sa->sa_len = sizeof(long); 410 #endif 411 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 412 p_sockaddr(sa, NULL, 0, 18); 413 } 414 p_flags(rtm->rtm_flags & interesting); 415 putchar('\n'); 416 } 417 418 static void 419 p_sockaddr(sa, mask, flags, width) 420 const struct sockaddr *sa, *mask; 421 int flags, width; 422 { 423 char workbuf[128], *cplim; 424 char *cp = workbuf; 425 char *ep = workbuf + sizeof(workbuf); 426 427 switch(sa->sa_family) { 428 case AF_INET: 429 { 430 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 431 432 if ((sin->sin_addr.s_addr == INADDR_ANY) && 433 (mask != NULL) && 434 (((struct sockaddr_in *)mask)->sin_addr.s_addr == 0)) 435 cp = "default"; 436 else if (flags & RTF_HOST) 437 cp = routename(sin->sin_addr.s_addr); 438 else if (mask) 439 cp = netname(sin->sin_addr.s_addr, 440 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 441 else 442 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 443 break; 444 } 445 446 #ifdef INET6 447 case AF_INET6: 448 { 449 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 450 #ifdef KAME_SCOPEID 451 struct in6_addr *in6 = &sa6->sin6_addr; 452 453 /* 454 * XXX: This is a special workaround for KAME kernels. 455 * sin6_scope_id field of SA should be set in the future. 456 */ 457 if (IN6_IS_ADDR_LINKLOCAL(in6) || 458 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 459 /* XXX: override is ok? */ 460 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 461 *(u_short *)&in6->s6_addr[2] = 0; 462 } 463 #endif 464 465 if (flags & RTF_HOST) 466 cp = routename6(sa6); 467 else if (mask) { 468 cp = netname6(sa6, 469 &((struct sockaddr_in6 *)mask)->sin6_addr); 470 } else 471 cp = netname6(sa6, NULL); 472 break; 473 } 474 #endif 475 476 #ifndef SMALL 477 case AF_APPLETALK: 478 case 0: 479 { 480 if (!(flags & RTF_HOST) && mask) 481 cp = atalk_print2(sa,mask,11); 482 else 483 cp = atalk_print(sa,11); 484 break; 485 } 486 case AF_NS: 487 cp = ns_print((struct sockaddr *)sa); 488 break; 489 #endif 490 491 case AF_LINK: 492 { 493 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 494 495 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 496 sdl->sdl_slen == 0) 497 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 498 sdl->sdl_index); 499 else switch (sdl->sdl_type) { 500 case IFT_FDDI: 501 case IFT_ETHER: 502 case IFT_IEEE1394: 503 { 504 int i, alen = sdl->sdl_alen; 505 u_char *lla = (u_char *)sdl->sdl_data + 506 sdl->sdl_nlen; 507 508 if (sdl->sdl_type == IFT_IEEE1394 && alen > 8) 509 alen = 8; 510 511 cplim = ""; 512 for (i = 0; i < alen; i++, lla++) { 513 /* XXX */ 514 cp += snprintf(cp, ep - cp, 515 "%s%02x", cplim, *lla); 516 cplim = ":"; 517 } 518 cp = workbuf; 519 break; 520 } 521 default: 522 cp = link_ntoa(sdl); 523 break; 524 } 525 break; 526 } 527 528 default: 529 { 530 u_char *s = (u_char *)sa->sa_data, *slim; 531 532 slim = sa->sa_len + (u_char *) sa; 533 cplim = cp + sizeof(workbuf) - 6; 534 cp += snprintf(cp, ep - cp, "(%d)", sa->sa_family); 535 while (s < slim && cp < cplim) { 536 cp += snprintf(cp, ep - cp, " %02x", *s++); 537 if (s < slim) 538 cp += snprintf(cp, ep - cp, "%02x", *s++); 539 } 540 cp = workbuf; 541 } 542 } 543 if (width < 0 ) 544 printf("%s ", cp); 545 else { 546 if (nflag) 547 printf("%-*s ", width, cp); 548 else 549 printf("%-*.*s ", width, width, cp); 550 } 551 } 552 553 static void 554 p_flags(f) 555 int f; 556 { 557 char name[33], *flags; 558 struct bits *p = bits; 559 560 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 561 if (p->b_mask & f) 562 *flags++ = p->b_val; 563 *flags = '\0'; 564 printf("%-6.6s ", name); 565 } 566 567 static struct sockaddr *sockcopy __P((struct sockaddr *, 568 union sockaddr_union *)); 569 570 /* 571 * copy a sockaddr into an allocated region, allocate at least sockaddr 572 * bytes and zero unused 573 */ 574 static struct sockaddr * 575 sockcopy(sp, dp) 576 struct sockaddr *sp; 577 union sockaddr_union *dp; 578 { 579 int len; 580 581 if (sp == 0 || sp->sa_len == 0) 582 (void)memset(dp, 0, sizeof (*sp)); 583 else { 584 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 585 (void)memcpy(dp, sp, len); 586 } 587 return ((struct sockaddr *)dp); 588 } 589 590 static void 591 p_rtentry(rt) 592 struct rtentry *rt; 593 { 594 static struct ifnet ifnet, *lastif; 595 union sockaddr_union addr_un, mask_un; 596 struct sockaddr *addr, *mask; 597 int af; 598 599 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 600 return; 601 602 memset(&addr_un, 0, sizeof(addr_un)); 603 memset(&mask_un, 0, sizeof(mask_un)); 604 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 605 af = addr->sa_family; 606 if (rt_mask(rt)) 607 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 608 else 609 mask = sockcopy(NULL, &mask_un); 610 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 611 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 612 p_flags(rt->rt_flags); 613 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 614 if (rt->rt_rmx.rmx_mtu) 615 printf("%6lu", rt->rt_rmx.rmx_mtu); 616 else 617 printf("%6s", "-"); 618 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 619 if (rt->rt_ifp) { 620 if (rt->rt_ifp != lastif) { 621 kget(rt->rt_ifp, ifnet); 622 lastif = rt->rt_ifp; 623 } 624 printf(" %.16s%s", ifnet.if_xname, 625 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 626 } 627 putchar('\n'); 628 if (vflag) { 629 printf("\texpire %10lu%c recvpipe %10ld%c " 630 "sendpipe %10ld%c\n", 631 rt->rt_rmx.rmx_expire, 632 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 633 rt->rt_rmx.rmx_recvpipe, 634 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 635 rt->rt_rmx.rmx_sendpipe, 636 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 637 printf("\tssthresh %10lu%c rtt %10ld%c " 638 "rttvar %10ld%c\n", 639 rt->rt_rmx.rmx_ssthresh, 640 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 641 rt->rt_rmx.rmx_rtt, 642 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 643 rt->rt_rmx.rmx_rttvar, 644 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 645 printf("\thopcount %10lu%c\n", 646 rt->rt_rmx.rmx_hopcount, 647 (rt->rt_rmx.rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 648 } 649 } 650 651 char * 652 routename(in) 653 u_int32_t in; 654 { 655 char *cp; 656 static char line[MAXHOSTNAMELEN + 1]; 657 struct hostent *hp; 658 static char domain[MAXHOSTNAMELEN + 1]; 659 static int first = 1; 660 661 if (first) { 662 first = 0; 663 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 664 domain[sizeof(domain) - 1] = '\0'; 665 if ((cp = strchr(domain, '.'))) 666 (void)strlcpy(domain, cp + 1, sizeof(domain)); 667 else 668 domain[0] = 0; 669 } else 670 domain[0] = 0; 671 } 672 cp = 0; 673 if (!nflag) { 674 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 675 AF_INET); 676 if (hp) { 677 if ((cp = strchr(hp->h_name, '.')) && 678 !strcmp(cp + 1, domain)) 679 *cp = 0; 680 cp = hp->h_name; 681 } 682 } 683 if (cp) { 684 strncpy(line, cp, sizeof(line) - 1); 685 line[sizeof(line) - 1] = '\0'; 686 } else { 687 #define C(x) ((x) & 0xff) 688 in = ntohl(in); 689 snprintf(line, sizeof line, "%u.%u.%u.%u", 690 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 691 } 692 return (line); 693 } 694 695 static u_long 696 forgemask(a) 697 u_long a; 698 { 699 u_long m; 700 701 if (IN_CLASSA(a)) 702 m = IN_CLASSA_NET; 703 else if (IN_CLASSB(a)) 704 m = IN_CLASSB_NET; 705 else 706 m = IN_CLASSC_NET; 707 return (m); 708 } 709 710 static void 711 domask(dst, dlen, addr, mask) 712 char *dst; 713 size_t dlen; 714 u_long addr, mask; 715 { 716 int b, i; 717 718 if (!mask || (forgemask(addr) == mask)) { 719 *dst = '\0'; 720 return; 721 } 722 i = 0; 723 for (b = 0; b < 32; b++) 724 if (mask & (1 << b)) { 725 int bb; 726 727 i = b; 728 for (bb = b+1; bb < 32; bb++) 729 if (!(mask & (1 << bb))) { 730 i = -1; /* noncontig */ 731 break; 732 } 733 break; 734 } 735 if (i == -1) 736 (void)snprintf(dst, dlen, "&0x%lx", mask); 737 else 738 (void)snprintf(dst, dlen, "/%d", 32-i); 739 } 740 741 /* 742 * Return the name of the network whose address is given. 743 * The address is assumed to be that of a net or subnet, not a host. 744 */ 745 char * 746 netname(in, mask) 747 u_int32_t in, mask; 748 { 749 char *cp = 0; 750 static char line[MAXHOSTNAMELEN + 4]; 751 struct netent *np = 0; 752 u_int32_t net, omask; 753 u_int32_t i; 754 int subnetshift; 755 756 i = ntohl(in); 757 omask = mask = ntohl(mask); 758 if (!nflag && i != INADDR_ANY) { 759 if (mask == INADDR_ANY) { 760 switch (mask = forgemask(i)) { 761 case IN_CLASSA_NET: 762 subnetshift = 8; 763 break; 764 case IN_CLASSB_NET: 765 subnetshift = 8; 766 break; 767 case IN_CLASSC_NET: 768 subnetshift = 4; 769 break; 770 default: 771 abort(); 772 } 773 /* 774 * If there are more bits than the standard mask 775 * would suggest, subnets must be in use. 776 * Guess at the subnet mask, assuming reasonable 777 * width subnet fields. 778 */ 779 while (i &~ mask) 780 mask = (long)mask >> subnetshift; 781 } 782 net = i & mask; 783 /* 784 * Note: shift the hosts bits out in octet units, since 785 * not all versions of getnetbyaddr() do this for us (e.g. 786 * the current `etc/networks' parser). 787 */ 788 while ((mask & 0xff) == 0) 789 mask >>= 8, net >>= 8; 790 np = getnetbyaddr(net, AF_INET); 791 if (np) 792 cp = np->n_name; 793 } 794 if (cp) 795 strncpy(line, cp, sizeof(line) - 1); 796 else if ((i & 0xffffff) == 0) 797 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 798 else if ((i & 0xffff) == 0) 799 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 800 , C(i >> 16)); 801 else if ((i & 0xff) == 0) 802 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 803 C(i >> 16), C(i >> 8)); 804 else 805 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 806 C(i >> 16), C(i >> 8), C(i)); 807 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 808 return (line); 809 } 810 811 #ifdef INET6 812 char * 813 netname6(sa6, mask) 814 struct sockaddr_in6 *sa6; 815 struct in6_addr *mask; 816 { 817 static char line[NI_MAXHOST]; 818 u_char *p, *q; 819 u_char *lim; 820 int masklen, final = 0, illegal = 0; 821 #ifdef KAME_SCOPEID 822 int flag = NI_WITHSCOPEID; 823 #else 824 int flag = 0; 825 #endif 826 int error; 827 struct sockaddr_in6 sin6; 828 829 sin6 = *sa6; 830 if (mask) { 831 masklen = 0; 832 lim = (u_char *)(mask + 1); 833 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 834 p < lim; 835 p++, q++) { 836 if (final && *p) { 837 illegal++; 838 *q = 0; 839 continue; 840 } 841 842 switch (*p & 0xff) { 843 case 0xff: 844 masklen += 8; 845 break; 846 case 0xfe: 847 masklen += 7; 848 final++; 849 break; 850 case 0xfc: 851 masklen += 6; 852 final++; 853 break; 854 case 0xf8: 855 masklen += 5; 856 final++; 857 break; 858 case 0xf0: 859 masklen += 4; 860 final++; 861 break; 862 case 0xe0: 863 masklen += 3; 864 final++; 865 break; 866 case 0xc0: 867 masklen += 2; 868 final++; 869 break; 870 case 0x80: 871 masklen += 1; 872 final++; 873 break; 874 case 0x00: 875 final++; 876 break; 877 default: 878 final++; 879 illegal++; 880 break; 881 } 882 883 if (!illegal) 884 *q &= *p; 885 else 886 *q = 0; 887 } 888 } else 889 masklen = 128; 890 891 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 892 return("default"); 893 894 if (nflag) 895 flag |= NI_NUMERICHOST; 896 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 897 line, sizeof(line), NULL, 0, flag); 898 if (error) 899 strlcpy(line, "invalid", sizeof(line)); 900 901 if (nflag) 902 snprintf(&line[strlen(line)], sizeof(line) - strlen(line), 903 "/%d", masklen); 904 905 return line; 906 } 907 908 char * 909 routename6(sa6) 910 struct sockaddr_in6 *sa6; 911 { 912 static char line[NI_MAXHOST]; 913 #ifdef KAME_SCOPEID 914 int flag = NI_WITHSCOPEID; 915 #else 916 int flag = 0; 917 #endif 918 /* use local variable for safety */ 919 struct sockaddr_in6 sa6_local; 920 int error; 921 922 memset(&sa6_local, 0, sizeof(sa6_local)); 923 sa6_local.sin6_family = AF_INET6; 924 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 925 sa6_local.sin6_addr = sa6->sin6_addr; 926 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 927 928 if (nflag) 929 flag |= NI_NUMERICHOST; 930 931 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 932 line, sizeof(line), NULL, 0, flag); 933 if (error) 934 strlcpy(line, "invalid", sizeof(line)); 935 936 return line; 937 } 938 #endif /*INET6*/ 939 940 /* 941 * Print routing statistics 942 */ 943 void 944 rt_stats(off) 945 u_long off; 946 { 947 struct rtstat rtstat; 948 949 if (off == 0) { 950 printf("rtstat: symbol not in namelist\n"); 951 return; 952 } 953 kread(off, (char *)&rtstat, sizeof (rtstat)); 954 printf("routing:\n"); 955 printf("\t%llu bad routing redirect%s\n", 956 (unsigned long long)rtstat.rts_badredirect, 957 plural(rtstat.rts_badredirect)); 958 printf("\t%llu dynamically created route%s\n", 959 (unsigned long long)rtstat.rts_dynamic, 960 plural(rtstat.rts_dynamic)); 961 printf("\t%llu new gateway%s due to redirects\n", 962 (unsigned long long)rtstat.rts_newgateway, 963 plural(rtstat.rts_newgateway)); 964 printf("\t%llu destination%s found unreachable\n", 965 (unsigned long long)rtstat.rts_unreach, 966 plural(rtstat.rts_unreach)); 967 printf("\t%llu use%s of a wildcard route\n", 968 (unsigned long long)rtstat.rts_wildcard, 969 plural(rtstat.rts_wildcard)); 970 } 971 short ns_nullh[] = {0,0,0}; 972 short ns_bh[] = {-1,-1,-1}; 973 974 char * 975 ns_print(sa) 976 struct sockaddr *sa; 977 { 978 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 979 struct ns_addr work; 980 union { 981 union ns_net net_e; 982 u_long long_e; 983 } net; 984 u_short port; 985 static char mybuf[50], cport[10], chost[25]; 986 char *host = ""; 987 char *p; 988 u_char *q; 989 990 work = sns->sns_addr; 991 port = ntohs(work.x_port); 992 work.x_port = 0; 993 net.net_e = work.x_net; 994 if (ns_nullhost(work) && net.long_e == 0) { 995 if (port ) { 996 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 997 upHex(mybuf); 998 } else 999 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 1000 return (mybuf); 1001 } 1002 1003 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 1004 host = "any"; 1005 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 1006 host = "*"; 1007 } else { 1008 q = work.x_host.c_host; 1009 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 1010 q[0], q[1], q[2], q[3], q[4], q[5]); 1011 for (p = chost; *p == '0' && p < chost + 12; p++) 1012 continue; 1013 host = p; 1014 } 1015 if (port) 1016 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 1017 else 1018 *cport = 0; 1019 1020 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 1021 host, cport); 1022 upHex(mybuf); 1023 return (mybuf); 1024 } 1025 1026 char * 1027 ns_phost(sa) 1028 struct sockaddr *sa; 1029 { 1030 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1031 struct sockaddr_ns work; 1032 static union ns_net ns_zeronet; 1033 char *p; 1034 1035 work = *sns; 1036 work.sns_addr.x_port = 0; 1037 work.sns_addr.x_net = ns_zeronet; 1038 1039 p = ns_print((struct sockaddr *)&work); 1040 if (strncmp("0H.", p, 3) == 0) 1041 p += 3; 1042 return (p); 1043 } 1044 1045 void 1046 upHex(p0) 1047 char *p0; 1048 { 1049 char *p = p0; 1050 1051 for (; *p; p++) 1052 switch (*p) { 1053 case 'a': 1054 case 'b': 1055 case 'c': 1056 case 'd': 1057 case 'e': 1058 case 'f': 1059 *p += ('A' - 'a'); 1060 } 1061 } 1062
Indexes created Thu Sep 25 08:09:54 GMT 2025