route.c revision 1.54
1 /* $NetBSD: route.c,v 1.54 2001/03/08 03:47:04 enami 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 1.54 2001/03/08 03:47:04 enami 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; 425 426 switch(sa->sa_family) { 427 case AF_INET: 428 { 429 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 430 431 if ((sin->sin_addr.s_addr == INADDR_ANY) && 432 (mask != NULL) && 433 (((struct sockaddr_in *)mask)->sin_addr.s_addr == 0)) 434 cp = "default"; 435 else if (flags & RTF_HOST) 436 cp = routename(sin->sin_addr.s_addr); 437 else if (mask) 438 cp = netname(sin->sin_addr.s_addr, 439 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 440 else 441 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 442 break; 443 } 444 445 #ifdef INET6 446 case AF_INET6: 447 { 448 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 449 #ifdef KAME_SCOPEID 450 struct in6_addr *in6 = &sa6->sin6_addr; 451 452 /* 453 * XXX: This is a special workaround for KAME kernels. 454 * sin6_scope_id field of SA should be set in the future. 455 */ 456 if (IN6_IS_ADDR_LINKLOCAL(in6) || 457 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 458 /* XXX: override is ok? */ 459 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 460 *(u_short *)&in6->s6_addr[2] = 0; 461 } 462 #endif 463 464 if (flags & RTF_HOST) 465 cp = routename6(sa6); 466 else if (mask) { 467 cp = netname6(sa6, 468 &((struct sockaddr_in6 *)mask)->sin6_addr); 469 } else 470 cp = netname6(sa6, NULL); 471 break; 472 } 473 #endif 474 475 #ifndef SMALL 476 case AF_APPLETALK: 477 case 0: 478 { 479 if (!(flags & RTF_HOST) && mask) 480 cp = atalk_print2(sa,mask,11); 481 else 482 cp = atalk_print(sa,11); 483 break; 484 } 485 case AF_NS: 486 cp = ns_print((struct sockaddr *)sa); 487 break; 488 #endif 489 490 case AF_LINK: 491 { 492 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 493 494 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 495 sdl->sdl_slen == 0) 496 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 497 sdl->sdl_index); 498 else switch (sdl->sdl_type) { 499 case IFT_FDDI: 500 case IFT_ETHER: 501 case IFT_IEEE1394: 502 { 503 int i, alen = sdl->sdl_alen; 504 u_char *lla = (u_char *)sdl->sdl_data + 505 sdl->sdl_nlen; 506 507 if (sdl->sdl_type == IFT_IEEE1394 && alen > 8) 508 alen = 8; 509 510 cplim = ""; 511 for (i = 0; i < alen; i++, lla++) { 512 /* XXX */ 513 cp += sprintf(cp, "%s%02x", cplim, *lla); 514 cplim = ":"; 515 } 516 cp = workbuf; 517 break; 518 } 519 default: 520 cp = link_ntoa(sdl); 521 break; 522 } 523 break; 524 } 525 526 default: 527 { 528 u_char *s = (u_char *)sa->sa_data, *slim; 529 530 slim = sa->sa_len + (u_char *) sa; 531 cplim = cp + sizeof(workbuf) - 6; 532 cp += sprintf(cp, "(%d)", sa->sa_family); 533 while (s < slim && cp < cplim) { 534 cp += sprintf(cp, " %02x", *s++); 535 if (s < slim) 536 cp += sprintf(cp, "%02x", *s++); 537 } 538 cp = workbuf; 539 } 540 } 541 if (width < 0 ) 542 printf("%s ", cp); 543 else { 544 if (nflag) 545 printf("%-*s ", width, cp); 546 else 547 printf("%-*.*s ", width, width, cp); 548 } 549 } 550 551 static void 552 p_flags(f) 553 int f; 554 { 555 char name[33], *flags; 556 struct bits *p = bits; 557 558 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 559 if (p->b_mask & f) 560 *flags++ = p->b_val; 561 *flags = '\0'; 562 printf("%-6.6s ", name); 563 } 564 565 static struct sockaddr *sockcopy __P((struct sockaddr *, 566 union sockaddr_union *)); 567 568 /* 569 * copy a sockaddr into an allocated region, allocate at least sockaddr 570 * bytes and zero unused 571 */ 572 static struct sockaddr * 573 sockcopy(sp, dp) 574 struct sockaddr *sp; 575 union sockaddr_union *dp; 576 { 577 int len; 578 579 if (sp == 0 || sp->sa_len == 0) 580 (void)memset(dp, 0, sizeof (*sp)); 581 else { 582 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 583 (void)memcpy(dp, sp, len); 584 } 585 return ((struct sockaddr *)dp); 586 } 587 588 static void 589 p_rtentry(rt) 590 struct rtentry *rt; 591 { 592 static struct ifnet ifnet, *lastif; 593 union sockaddr_union addr_un, mask_un; 594 struct sockaddr *addr, *mask; 595 int af; 596 597 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 598 return; 599 600 memset(&addr_un, 0, sizeof(addr_un)); 601 memset(&mask_un, 0, sizeof(mask_un)); 602 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 603 af = addr->sa_family; 604 if (rt_mask(rt)) 605 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 606 else 607 mask = sockcopy(NULL, &mask_un); 608 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 609 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 610 p_flags(rt->rt_flags); 611 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 612 if (rt->rt_rmx.rmx_mtu) 613 printf("%6lu", rt->rt_rmx.rmx_mtu); 614 else 615 printf("%6s", "-"); 616 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 617 if (rt->rt_ifp) { 618 if (rt->rt_ifp != lastif) { 619 kget(rt->rt_ifp, ifnet); 620 lastif = rt->rt_ifp; 621 } 622 printf(" %.16s%s", ifnet.if_xname, 623 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 624 } 625 putchar('\n'); 626 if (vflag) { 627 printf("\texpire %10lu%c recvpipe %10ld%c " 628 "sendpipe %10ld%c\n", 629 rt->rt_rmx.rmx_expire, 630 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 631 rt->rt_rmx.rmx_recvpipe, 632 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 633 rt->rt_rmx.rmx_sendpipe, 634 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 635 printf("\tssthresh %10lu%c rtt %10ld%c " 636 "rttvar %10ld%c\n", 637 rt->rt_rmx.rmx_ssthresh, 638 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 639 rt->rt_rmx.rmx_rtt, 640 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 641 rt->rt_rmx.rmx_rttvar, 642 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 643 printf("\thopcount %10lu%c\n", 644 rt->rt_rmx.rmx_hopcount, 645 (rt->rt_rmx.rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 646 } 647 } 648 649 char * 650 routename(in) 651 u_int32_t in; 652 { 653 char *cp; 654 static char line[MAXHOSTNAMELEN + 1]; 655 struct hostent *hp; 656 static char domain[MAXHOSTNAMELEN + 1]; 657 static int first = 1; 658 659 if (first) { 660 first = 0; 661 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 662 domain[sizeof(domain) - 1] = '\0'; 663 if ((cp = strchr(domain, '.'))) 664 (void)strcpy(domain, cp + 1); 665 else 666 domain[0] = 0; 667 } else 668 domain[0] = 0; 669 } 670 cp = 0; 671 if (!nflag) { 672 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 673 AF_INET); 674 if (hp) { 675 if ((cp = strchr(hp->h_name, '.')) && 676 !strcmp(cp + 1, domain)) 677 *cp = 0; 678 cp = hp->h_name; 679 } 680 } 681 if (cp) { 682 strncpy(line, cp, sizeof(line) - 1); 683 line[sizeof(line) - 1] = '\0'; 684 } else { 685 #define C(x) ((x) & 0xff) 686 in = ntohl(in); 687 snprintf(line, sizeof line, "%u.%u.%u.%u", 688 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 689 } 690 return (line); 691 } 692 693 static u_long 694 forgemask(a) 695 u_long a; 696 { 697 u_long m; 698 699 if (IN_CLASSA(a)) 700 m = IN_CLASSA_NET; 701 else if (IN_CLASSB(a)) 702 m = IN_CLASSB_NET; 703 else 704 m = IN_CLASSC_NET; 705 return (m); 706 } 707 708 static void 709 domask(dst, dlen, addr, mask) 710 char *dst; 711 size_t dlen; 712 u_long addr, mask; 713 { 714 int b, i; 715 716 if (!mask || (forgemask(addr) == mask)) { 717 *dst = '\0'; 718 return; 719 } 720 i = 0; 721 for (b = 0; b < 32; b++) 722 if (mask & (1 << b)) { 723 int bb; 724 725 i = b; 726 for (bb = b+1; bb < 32; bb++) 727 if (!(mask & (1 << bb))) { 728 i = -1; /* noncontig */ 729 break; 730 } 731 break; 732 } 733 if (i == -1) 734 (void)snprintf(dst, dlen, "&0x%lx", mask); 735 else 736 (void)snprintf(dst, dlen, "/%d", 32-i); 737 } 738 739 /* 740 * Return the name of the network whose address is given. 741 * The address is assumed to be that of a net or subnet, not a host. 742 */ 743 char * 744 netname(in, mask) 745 u_int32_t in, mask; 746 { 747 char *cp = 0; 748 static char line[MAXHOSTNAMELEN + 4]; 749 struct netent *np = 0; 750 u_int32_t net, omask; 751 u_int32_t i; 752 int subnetshift; 753 754 i = ntohl(in); 755 omask = mask = ntohl(mask); 756 if (!nflag && i != INADDR_ANY) { 757 if (mask == INADDR_ANY) { 758 switch (mask = forgemask(i)) { 759 case IN_CLASSA_NET: 760 subnetshift = 8; 761 break; 762 case IN_CLASSB_NET: 763 subnetshift = 8; 764 break; 765 case IN_CLASSC_NET: 766 subnetshift = 4; 767 break; 768 default: 769 abort(); 770 } 771 /* 772 * If there are more bits than the standard mask 773 * would suggest, subnets must be in use. 774 * Guess at the subnet mask, assuming reasonable 775 * width subnet fields. 776 */ 777 while (i &~ mask) 778 mask = (long)mask >> subnetshift; 779 } 780 net = i & mask; 781 /* 782 * Note: shift the hosts bits out in octet units, since 783 * not all versions of getnetbyaddr() do this for us (e.g. 784 * the current `etc/networks' parser). 785 */ 786 while ((mask & 0xff) == 0) 787 mask >>= 8, net >>= 8; 788 np = getnetbyaddr(net, AF_INET); 789 if (np) 790 cp = np->n_name; 791 } 792 if (cp) 793 strncpy(line, cp, sizeof(line) - 1); 794 else if ((i & 0xffffff) == 0) 795 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 796 else if ((i & 0xffff) == 0) 797 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 798 , C(i >> 16)); 799 else if ((i & 0xff) == 0) 800 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 801 C(i >> 16), C(i >> 8)); 802 else 803 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 804 C(i >> 16), C(i >> 8), C(i)); 805 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 806 return (line); 807 } 808 809 #ifdef INET6 810 char * 811 netname6(sa6, mask) 812 struct sockaddr_in6 *sa6; 813 struct in6_addr *mask; 814 { 815 static char line[NI_MAXHOST]; 816 u_char *p, *q; 817 u_char *lim; 818 int masklen, final = 0, illegal = 0; 819 #ifdef KAME_SCOPEID 820 int flag = NI_WITHSCOPEID; 821 #else 822 int flag = 0; 823 #endif 824 int error; 825 struct sockaddr_in6 sin6; 826 827 sin6 = *sa6; 828 if (mask) { 829 masklen = 0; 830 lim = (u_char *)(mask + 1); 831 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 832 p < lim; 833 p++, q++) { 834 if (final && *p) { 835 illegal++; 836 *q = 0; 837 continue; 838 } 839 840 switch (*p & 0xff) { 841 case 0xff: 842 masklen += 8; 843 break; 844 case 0xfe: 845 masklen += 7; 846 final++; 847 break; 848 case 0xfc: 849 masklen += 6; 850 final++; 851 break; 852 case 0xf8: 853 masklen += 5; 854 final++; 855 break; 856 case 0xf0: 857 masklen += 4; 858 final++; 859 break; 860 case 0xe0: 861 masklen += 3; 862 final++; 863 break; 864 case 0xc0: 865 masklen += 2; 866 final++; 867 break; 868 case 0x80: 869 masklen += 1; 870 final++; 871 break; 872 case 0x00: 873 final++; 874 break; 875 default: 876 final++; 877 illegal++; 878 break; 879 } 880 881 if (!illegal) 882 *q &= *p; 883 else 884 *q = 0; 885 } 886 } else 887 masklen = 128; 888 889 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 890 return("default"); 891 892 if (nflag) 893 flag |= NI_NUMERICHOST; 894 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 895 line, sizeof(line), NULL, 0, flag); 896 if (error) 897 strcpy(line, "invalid"); 898 899 if (nflag) 900 sprintf(&line[strlen(line)], "/%d", masklen); 901 902 return line; 903 } 904 905 char * 906 routename6(sa6) 907 struct sockaddr_in6 *sa6; 908 { 909 static char line[NI_MAXHOST]; 910 #ifdef KAME_SCOPEID 911 int flag = NI_WITHSCOPEID; 912 #else 913 int flag = 0; 914 #endif 915 /* use local variable for safety */ 916 struct sockaddr_in6 sa6_local; 917 int error; 918 919 memset(&sa6_local, 0, sizeof(sa6_local)); 920 sa6_local.sin6_family = AF_INET6; 921 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 922 sa6_local.sin6_addr = sa6->sin6_addr; 923 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 924 925 if (nflag) 926 flag |= NI_NUMERICHOST; 927 928 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 929 line, sizeof(line), NULL, 0, flag); 930 if (error) 931 strcpy(line, "invalid"); 932 933 return line; 934 } 935 #endif /*INET6*/ 936 937 /* 938 * Print routing statistics 939 */ 940 void 941 rt_stats(off) 942 u_long off; 943 { 944 struct rtstat rtstat; 945 946 if (off == 0) { 947 printf("rtstat: symbol not in namelist\n"); 948 return; 949 } 950 kread(off, (char *)&rtstat, sizeof (rtstat)); 951 printf("routing:\n"); 952 printf("\t%llu bad routing redirect%s\n", 953 (unsigned long long)rtstat.rts_badredirect, 954 plural(rtstat.rts_badredirect)); 955 printf("\t%llu dynamically created route%s\n", 956 (unsigned long long)rtstat.rts_dynamic, 957 plural(rtstat.rts_dynamic)); 958 printf("\t%llu new gateway%s due to redirects\n", 959 (unsigned long long)rtstat.rts_newgateway, 960 plural(rtstat.rts_newgateway)); 961 printf("\t%llu destination%s found unreachable\n", 962 (unsigned long long)rtstat.rts_unreach, 963 plural(rtstat.rts_unreach)); 964 printf("\t%llu use%s of a wildcard route\n", 965 (unsigned long long)rtstat.rts_wildcard, 966 plural(rtstat.rts_wildcard)); 967 } 968 short ns_nullh[] = {0,0,0}; 969 short ns_bh[] = {-1,-1,-1}; 970 971 char * 972 ns_print(sa) 973 struct sockaddr *sa; 974 { 975 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 976 struct ns_addr work; 977 union { 978 union ns_net net_e; 979 u_long long_e; 980 } net; 981 u_short port; 982 static char mybuf[50], cport[10], chost[25]; 983 char *host = ""; 984 char *p; 985 u_char *q; 986 987 work = sns->sns_addr; 988 port = ntohs(work.x_port); 989 work.x_port = 0; 990 net.net_e = work.x_net; 991 if (ns_nullhost(work) && net.long_e == 0) { 992 if (port ) { 993 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 994 upHex(mybuf); 995 } else 996 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 997 return (mybuf); 998 } 999 1000 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 1001 host = "any"; 1002 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 1003 host = "*"; 1004 } else { 1005 q = work.x_host.c_host; 1006 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 1007 q[0], q[1], q[2], q[3], q[4], q[5]); 1008 for (p = chost; *p == '0' && p < chost + 12; p++) 1009 continue; 1010 host = p; 1011 } 1012 if (port) 1013 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 1014 else 1015 *cport = 0; 1016 1017 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 1018 host, cport); 1019 upHex(mybuf); 1020 return (mybuf); 1021 } 1022 1023 char * 1024 ns_phost(sa) 1025 struct sockaddr *sa; 1026 { 1027 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1028 struct sockaddr_ns work; 1029 static union ns_net ns_zeronet; 1030 char *p; 1031 1032 work = *sns; 1033 work.sns_addr.x_port = 0; 1034 work.sns_addr.x_net = ns_zeronet; 1035 1036 p = ns_print((struct sockaddr *)&work); 1037 if (strncmp("0H.", p, 3) == 0) 1038 p += 3; 1039 return (p); 1040 } 1041 1042 void 1043 upHex(p0) 1044 char *p0; 1045 { 1046 char *p = p0; 1047 1048 for (; *p; p++) 1049 switch (*p) { 1050 case 'a': 1051 case 'b': 1052 case 'c': 1053 case 'd': 1054 case 'e': 1055 case 'f': 1056 *p += ('A' - 'a'); 1057 } 1058 } 1059
Indexes created Tue Sep 23 14:10:03 GMT 2025