route.c revision 1.49
1 /* $NetBSD: route.c,v 1.49 2000/07/06 12:40:19 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 1.49 2000/07/06 12:40:19 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_BLACKHOLE,'B' }, 95 { RTF_DYNAMIC, 'D' }, 96 { RTF_MODIFIED, 'M' }, 97 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 98 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */ 99 { RTF_CLONING, 'C' }, 100 { RTF_XRESOLVE, 'X' }, 101 { RTF_LLINFO, 'L' }, 102 { RTF_STATIC, 'S' }, 103 { RTF_PROTO1, '1' }, 104 { RTF_PROTO2, '2' }, 105 { 0 } 106 }; 107 108 /* 109 * XXX we put all of the sockaddr types in here to force the alignment 110 * to be correct. 111 */ 112 static union sockaddr_union { 113 struct sockaddr u_sa; 114 struct sockaddr_in u_in; 115 struct sockaddr_un u_un; 116 struct sockaddr_iso u_iso; 117 struct sockaddr_at u_at; 118 struct sockaddr_dl u_dl; 119 struct sockaddr_ns u_ns; 120 u_short u_data[128]; 121 int u_dummy; /* force word-alignment */ 122 } pt_u; 123 124 int do_rtent = 0; 125 struct rtentry rtentry; 126 struct radix_node rnode; 127 struct radix_mask rmask; 128 129 int NewTree = 0; 130 131 static struct sockaddr *kgetsa __P((struct sockaddr *)); 132 static void p_tree __P((struct radix_node *)); 133 static void p_rtnode __P((void)); 134 static void ntreestuff __P((void)); 135 static void np_rtentry __P((struct rt_msghdr *)); 136 static void p_sockaddr __P((const struct sockaddr *, 137 const struct sockaddr *, int, int)); 138 static void p_flags __P((int, char *)); 139 static void p_rtentry __P((struct rtentry *)); 140 static void ntreestuff __P((void)); 141 static u_long forgemask __P((u_long)); 142 static void domask __P((char *, size_t, u_long, u_long)); 143 144 /* 145 * Print routing tables. 146 */ 147 void 148 routepr(rtree) 149 u_long rtree; 150 { 151 struct radix_node_head *rnh, head; 152 int i; 153 154 printf("Routing tables\n"); 155 156 if (Aflag == 0 && NewTree) 157 ntreestuff(); 158 else { 159 if (rtree == 0) { 160 printf("rt_tables: symbol not in namelist\n"); 161 return; 162 } 163 164 kget(rtree, rt_tables); 165 for (i = 0; i <= AF_MAX; i++) { 166 if ((rnh = rt_tables[i]) == 0) 167 continue; 168 kget(rnh, head); 169 if (i == AF_UNSPEC) { 170 if (Aflag && af == 0) { 171 printf("Netmasks:\n"); 172 p_tree(head.rnh_treetop); 173 } 174 } else if (af == AF_UNSPEC || af == i) { 175 pr_family(i); 176 do_rtent = 1; 177 pr_rthdr(i); 178 p_tree(head.rnh_treetop); 179 } 180 } 181 } 182 } 183 184 /* 185 * Print address family header before a section of the routing table. 186 */ 187 void 188 pr_family(af) 189 int af; 190 { 191 char *afname; 192 193 switch (af) { 194 case AF_INET: 195 afname = "Internet"; 196 break; 197 #ifdef INET6 198 case AF_INET6: 199 afname = "Internet6"; 200 break; 201 #endif 202 case AF_NS: 203 afname = "XNS"; 204 break; 205 case AF_ISO: 206 afname = "ISO"; 207 break; 208 case AF_APPLETALK: 209 afname = "AppleTalk"; 210 break; 211 case AF_CCITT: 212 afname = "X.25"; 213 break; 214 default: 215 afname = NULL; 216 break; 217 } 218 if (afname) 219 printf("\n%s:\n", afname); 220 else 221 printf("\nProtocol Family %d:\n", af); 222 } 223 224 /* column widths; each followed by one space */ 225 #ifndef INET6 226 #define WID_DST(af) 18 /* width of destination column */ 227 #define WID_GW(af) 18 /* width of gateway column */ 228 #else 229 /* width of destination/gateway column */ 230 #ifdef KAME_SCOPEID 231 /* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 */ 232 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 34 : 18) : 18) 233 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18) 234 #else 235 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 236 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 29 : 18) : 18) 237 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 25 : 18) : 18) 238 #endif 239 #endif /* INET6 */ 240 241 /* 242 * Print header for routing table columns. 243 */ 244 void 245 pr_rthdr(af) 246 int af; 247 { 248 249 if (Aflag) 250 printf("%-8.8s ","Address"); 251 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 252 WID_DST(af), WID_DST(af), "Destination", 253 WID_GW(af), WID_GW(af), "Gateway", 254 "Flags", "Refs", "Use", "Mtu", "Interface"); 255 } 256 257 static struct sockaddr * 258 kgetsa(dst) 259 struct sockaddr *dst; 260 { 261 262 kget(dst, pt_u.u_sa); 263 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 264 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 265 return (&pt_u.u_sa); 266 } 267 268 static void 269 p_tree(rn) 270 struct radix_node *rn; 271 { 272 273 again: 274 kget(rn, rnode); 275 if (rnode.rn_b < 0) { 276 if (Aflag) 277 printf("%-8.8lx ", (u_long) rn); 278 if (rnode.rn_flags & RNF_ROOT) { 279 if (Aflag) 280 printf("(root node)%s", 281 rnode.rn_dupedkey ? " =>\n" : "\n"); 282 } else if (do_rtent) { 283 kget(rn, rtentry); 284 p_rtentry(&rtentry); 285 if (Aflag) 286 p_rtnode(); 287 } else { 288 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 289 NULL, 0, 44); 290 putchar('\n'); 291 } 292 if ((rn = rnode.rn_dupedkey) != NULL) 293 goto again; 294 } else { 295 if (Aflag && do_rtent) { 296 printf("%-8.8lx ", (u_long) rn); 297 p_rtnode(); 298 } 299 rn = rnode.rn_r; 300 p_tree(rnode.rn_l); 301 p_tree(rn); 302 } 303 } 304 305 static void 306 p_rtnode() 307 { 308 struct radix_mask *rm = rnode.rn_mklist; 309 char nbuf[20]; 310 311 if (rnode.rn_b < 0) { 312 if (rnode.rn_mask) { 313 printf("\t mask "); 314 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 315 NULL, 0, -1); 316 } else if (rm == 0) 317 return; 318 } else { 319 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 320 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 321 (u_long) rnode.rn_r); 322 } 323 while (rm) { 324 kget(rm, rmask); 325 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 326 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 327 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 328 if (rmask.rm_flags & RNF_NORMAL) { 329 struct radix_node rnode_aux; 330 printf(" <normal>, "); 331 kget(rmask.rm_leaf, rnode_aux); 332 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 333 NULL, 0, -1); 334 } else 335 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 336 NULL, 0, -1); 337 putchar('}'); 338 if ((rm = rmask.rm_mklist) != NULL) 339 printf(" ->"); 340 } 341 putchar('\n'); 342 } 343 344 static void 345 ntreestuff() 346 { 347 size_t needed; 348 int mib[6]; 349 char *buf, *next, *lim; 350 struct rt_msghdr *rtm; 351 352 mib[0] = CTL_NET; 353 mib[1] = PF_ROUTE; 354 mib[2] = 0; 355 mib[3] = 0; 356 mib[4] = NET_RT_DUMP; 357 mib[5] = 0; 358 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 359 err(1, "route sysctl estimate"); 360 if ((buf = malloc(needed)) == 0) 361 errx(1, "out of space"); 362 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 363 err(1, "sysctl of routing table"); 364 lim = buf + needed; 365 for (next = buf; next < lim; next += rtm->rtm_msglen) { 366 rtm = (struct rt_msghdr *)next; 367 np_rtentry(rtm); 368 } 369 } 370 371 static void 372 np_rtentry(rtm) 373 struct rt_msghdr *rtm; 374 { 375 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 376 #ifdef notdef 377 static int masks_done, banner_printed; 378 #endif 379 static int old_af; 380 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 381 382 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 383 return; 384 #ifdef notdef 385 /* for the moment, netmasks are skipped over */ 386 if (!banner_printed) { 387 printf("Netmasks:\n"); 388 banner_printed = 1; 389 } 390 if (masks_done == 0) { 391 if (rtm->rtm_addrs != RTA_DST ) { 392 masks_done = 1; 393 af = sa->sa_family; 394 } 395 } else 396 #endif 397 af = sa->sa_family; 398 if (af != old_af) { 399 pr_family(af); 400 old_af = af; 401 } 402 if (rtm->rtm_addrs == RTA_DST) 403 p_sockaddr(sa, NULL, 0, 36); 404 else { 405 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 406 #if 0 407 if (sa->sa_len == 0) 408 sa->sa_len = sizeof(long); 409 #endif 410 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 411 p_sockaddr(sa, NULL, 0, 18); 412 } 413 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 414 putchar('\n'); 415 } 416 417 static void 418 p_sockaddr(sa, mask, flags, width) 419 const struct sockaddr *sa, *mask; 420 int flags, width; 421 { 422 char workbuf[128], *cplim; 423 char *cp = workbuf; 424 425 switch(sa->sa_family) { 426 case AF_INET: 427 { 428 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 429 430 if ((sin->sin_addr.s_addr == INADDR_ANY) && 431 (mask != NULL) && 432 (((struct sockaddr_in *)mask)->sin_addr.s_addr == 0)) 433 cp = "default"; 434 else if (flags & RTF_HOST) 435 cp = routename(sin->sin_addr.s_addr); 436 else if (mask) 437 cp = netname(sin->sin_addr.s_addr, 438 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 439 else 440 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 441 break; 442 } 443 444 #ifdef INET6 445 case AF_INET6: 446 { 447 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 448 #ifdef KAME_SCOPEID 449 struct in6_addr *in6 = &sa6->sin6_addr; 450 451 /* 452 * XXX: This is a special workaround for KAME kernels. 453 * sin6_scope_id field of SA should be set in the future. 454 */ 455 if (IN6_IS_ADDR_LINKLOCAL(in6) || 456 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 457 /* XXX: override is ok? */ 458 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 459 *(u_short *)&in6->s6_addr[2] = 0; 460 } 461 #endif 462 463 if (flags & RTF_HOST) 464 cp = routename6(sa6); 465 else if (mask) { 466 cp = netname6(sa6, 467 &((struct sockaddr_in6 *)mask)->sin6_addr); 468 } else 469 cp = netname6(sa6, NULL); 470 break; 471 } 472 #endif 473 474 #ifndef SMALL 475 case AF_APPLETALK: 476 case 0: 477 { 478 if (!(flags & RTF_HOST) && mask) 479 cp = atalk_print2(sa,mask,11); 480 else 481 cp = atalk_print(sa,11); 482 break; 483 } 484 case AF_NS: 485 cp = ns_print((struct sockaddr *)sa); 486 break; 487 #endif 488 489 case AF_LINK: 490 { 491 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 492 493 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 494 sdl->sdl_slen == 0) 495 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 496 sdl->sdl_index); 497 else switch (sdl->sdl_type) { 498 case IFT_FDDI: 499 case IFT_ETHER: 500 { 501 int i; 502 u_char *lla = (u_char *)sdl->sdl_data + 503 sdl->sdl_nlen; 504 505 cplim = ""; 506 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 507 /* XXX */ 508 cp += sprintf(cp, "%s%02x", cplim, *lla); 509 cplim = ":"; 510 } 511 cp = workbuf; 512 break; 513 } 514 default: 515 cp = link_ntoa(sdl); 516 break; 517 } 518 break; 519 } 520 521 default: 522 { 523 u_char *s = (u_char *)sa->sa_data, *slim; 524 525 slim = sa->sa_len + (u_char *) sa; 526 cplim = cp + sizeof(workbuf) - 6; 527 cp += sprintf(cp, "(%d)", sa->sa_family); 528 while (s < slim && cp < cplim) { 529 cp += sprintf(cp, " %02x", *s++); 530 if (s < slim) 531 cp += sprintf(cp, "%02x", *s++); 532 } 533 cp = workbuf; 534 } 535 } 536 if (width < 0 ) 537 printf("%s ", cp); 538 else { 539 if (nflag) 540 printf("%-*s ", width, cp); 541 else 542 printf("%-*.*s ", width, width, cp); 543 } 544 } 545 546 static void 547 p_flags(f, format) 548 int f; 549 char *format; 550 { 551 char name[33], *flags; 552 struct bits *p = bits; 553 554 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 555 if (p->b_mask & f) 556 *flags++ = p->b_val; 557 *flags = '\0'; 558 printf(format, name); 559 } 560 561 static struct sockaddr *sockcopy __P((struct sockaddr *, 562 union sockaddr_union *)); 563 564 /* 565 * copy a sockaddr into an allocated region, allocate at least sockaddr 566 * bytes and zero unused 567 */ 568 static struct sockaddr * 569 sockcopy(sp, dp) 570 struct sockaddr *sp; 571 union sockaddr_union *dp; 572 { 573 int len; 574 575 if (sp == 0 || sp->sa_len == 0) 576 (void)memset(dp, 0, sizeof (*sp)); 577 else { 578 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 579 (void)memcpy(dp, sp, len); 580 } 581 return ((struct sockaddr *)dp); 582 } 583 584 static void 585 p_rtentry(rt) 586 struct rtentry *rt; 587 { 588 static struct ifnet ifnet, *lastif; 589 union sockaddr_union addr_un, mask_un; 590 struct sockaddr *addr, *mask; 591 int af; 592 593 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 594 return; 595 596 memset(&addr_un, 0, sizeof(addr_un)); 597 memset(&mask_un, 0, sizeof(mask_un)); 598 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 599 af = addr->sa_family; 600 if (rt_mask(rt)) 601 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 602 else 603 mask = sockcopy(NULL, &mask_un); 604 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 605 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 606 p_flags(rt->rt_flags, "%-6.6s "); 607 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 608 if (rt->rt_rmx.rmx_mtu) 609 printf("%6lu", rt->rt_rmx.rmx_mtu); 610 else 611 printf("%6s", "-"); 612 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 613 if (rt->rt_ifp) { 614 if (rt->rt_ifp != lastif) { 615 kget(rt->rt_ifp, ifnet); 616 lastif = rt->rt_ifp; 617 } 618 printf(" %.16s%s", ifnet.if_xname, 619 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 620 } 621 putchar('\n'); 622 if (vflag) { 623 printf("\texpire %10lu%c recvpipe %10ld%c " 624 "sendpipe %10ld%c\n", 625 rt->rt_rmx.rmx_expire, 626 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 627 rt->rt_rmx.rmx_recvpipe, 628 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 629 rt->rt_rmx.rmx_sendpipe, 630 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 631 printf("\tssthresh %10lu%c rtt %10ld%c " 632 "rttvar %10ld%c\n", 633 rt->rt_rmx.rmx_ssthresh, 634 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 635 rt->rt_rmx.rmx_rtt, 636 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 637 rt->rt_rmx.rmx_rttvar, 638 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 639 } 640 641 } 642 643 char * 644 routename(in) 645 u_int32_t in; 646 { 647 char *cp; 648 static char line[MAXHOSTNAMELEN + 1]; 649 struct hostent *hp; 650 static char domain[MAXHOSTNAMELEN + 1]; 651 static int first = 1; 652 653 if (first) { 654 first = 0; 655 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 656 domain[sizeof(domain) - 1] = '\0'; 657 if ((cp = strchr(domain, '.'))) 658 (void)strcpy(domain, cp + 1); 659 else 660 domain[0] = 0; 661 } else 662 domain[0] = 0; 663 } 664 cp = 0; 665 if (!nflag) { 666 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 667 AF_INET); 668 if (hp) { 669 if ((cp = strchr(hp->h_name, '.')) && 670 !strcmp(cp + 1, domain)) 671 *cp = 0; 672 cp = hp->h_name; 673 } 674 } 675 if (cp) { 676 strncpy(line, cp, sizeof(line) - 1); 677 line[sizeof(line) - 1] = '\0'; 678 } else { 679 #define C(x) ((x) & 0xff) 680 in = ntohl(in); 681 snprintf(line, sizeof line, "%u.%u.%u.%u", 682 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 683 } 684 return (line); 685 } 686 687 static u_long 688 forgemask(a) 689 u_long a; 690 { 691 u_long m; 692 693 if (IN_CLASSA(a)) 694 m = IN_CLASSA_NET; 695 else if (IN_CLASSB(a)) 696 m = IN_CLASSB_NET; 697 else 698 m = IN_CLASSC_NET; 699 return (m); 700 } 701 702 static void 703 domask(dst, dlen, addr, mask) 704 char *dst; 705 size_t dlen; 706 u_long addr, mask; 707 { 708 int b, i; 709 710 if (!mask || (forgemask(addr) == mask)) { 711 *dst = '\0'; 712 return; 713 } 714 i = 0; 715 for (b = 0; b < 32; b++) 716 if (mask & (1 << b)) { 717 int bb; 718 719 i = b; 720 for (bb = b+1; bb < 32; bb++) 721 if (!(mask & (1 << bb))) { 722 i = -1; /* noncontig */ 723 break; 724 } 725 break; 726 } 727 if (i == -1) 728 (void)snprintf(dst, dlen, "&0x%lx", mask); 729 else 730 (void)snprintf(dst, dlen, "/%d", 32-i); 731 } 732 733 /* 734 * Return the name of the network whose address is given. 735 * The address is assumed to be that of a net or subnet, not a host. 736 */ 737 char * 738 netname(in, mask) 739 u_int32_t in, mask; 740 { 741 char *cp = 0; 742 static char line[MAXHOSTNAMELEN + 4]; 743 struct netent *np = 0; 744 u_int32_t net, omask; 745 u_int32_t i; 746 int subnetshift; 747 748 i = ntohl(in); 749 omask = mask = ntohl(mask); 750 if (!nflag && i != INADDR_ANY) { 751 if (mask == INADDR_ANY) { 752 switch (mask = forgemask(i)) { 753 case IN_CLASSA_NET: 754 subnetshift = 8; 755 break; 756 case IN_CLASSB_NET: 757 subnetshift = 8; 758 break; 759 case IN_CLASSC_NET: 760 subnetshift = 4; 761 break; 762 default: 763 abort(); 764 } 765 /* 766 * If there are more bits than the standard mask 767 * would suggest, subnets must be in use. 768 * Guess at the subnet mask, assuming reasonable 769 * width subnet fields. 770 */ 771 while (i &~ mask) 772 mask = (long)mask >> subnetshift; 773 } 774 net = i & mask; 775 /* 776 * Note: shift the hosts bits out in octet units, since 777 * not all versions of getnetbyaddr() do this for us (e.g. 778 * the current `etc/networks' parser). 779 */ 780 while ((mask & 0xff) == 0) 781 mask >>= 8, net >>= 8; 782 np = getnetbyaddr(net, AF_INET); 783 if (np) 784 cp = np->n_name; 785 } 786 if (cp) 787 strncpy(line, cp, sizeof(line) - 1); 788 else if ((i & 0xffffff) == 0) 789 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 790 else if ((i & 0xffff) == 0) 791 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 792 , C(i >> 16)); 793 else if ((i & 0xff) == 0) 794 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 795 C(i >> 16), C(i >> 8)); 796 else 797 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 798 C(i >> 16), C(i >> 8), C(i)); 799 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 800 return (line); 801 } 802 803 #ifdef INET6 804 char * 805 netname6(sa6, mask) 806 struct sockaddr_in6 *sa6; 807 struct in6_addr *mask; 808 { 809 static char line[NI_MAXHOST]; 810 u_char *p, *q; 811 u_char *lim; 812 int masklen, final = 0, illegal = 0; 813 #ifdef KAME_SCOPEID 814 int flag = NI_WITHSCOPEID; 815 #else 816 int flag = 0; 817 #endif 818 int error; 819 struct sockaddr_in6 sin6; 820 821 sin6 = *sa6; 822 if (mask) { 823 masklen = 0; 824 lim = (u_char *)(mask + 1); 825 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 826 p < lim; 827 p++, q++) { 828 if (final && *p) { 829 illegal++; 830 *q = 0; 831 continue; 832 } 833 834 switch (*p & 0xff) { 835 case 0xff: 836 masklen += 8; 837 break; 838 case 0xfe: 839 masklen += 7; 840 final++; 841 break; 842 case 0xfc: 843 masklen += 6; 844 final++; 845 break; 846 case 0xf8: 847 masklen += 5; 848 final++; 849 break; 850 case 0xf0: 851 masklen += 4; 852 final++; 853 break; 854 case 0xe0: 855 masklen += 3; 856 final++; 857 break; 858 case 0xc0: 859 masklen += 2; 860 final++; 861 break; 862 case 0x80: 863 masklen += 1; 864 final++; 865 break; 866 case 0x00: 867 final++; 868 break; 869 default: 870 final++; 871 illegal++; 872 break; 873 } 874 875 if (!illegal) 876 *q &= *p; 877 else 878 *q = 0; 879 } 880 } else 881 masklen = 128; 882 883 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 884 return("default"); 885 886 if (nflag) 887 flag |= NI_NUMERICHOST; 888 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 889 line, sizeof(line), NULL, 0, flag); 890 if (error) 891 strcpy(line, "invalid"); 892 893 if (nflag) 894 sprintf(&line[strlen(line)], "/%d", masklen); 895 896 return line; 897 } 898 899 char * 900 routename6(sa6) 901 struct sockaddr_in6 *sa6; 902 { 903 static char line[NI_MAXHOST]; 904 #ifdef KAME_SCOPEID 905 int flag = NI_WITHSCOPEID; 906 #else 907 int flag = 0; 908 #endif 909 /* use local variable for safety */ 910 struct sockaddr_in6 sa6_local; 911 int error; 912 913 memset(&sa6_local, 0, sizeof(sa6_local)); 914 sa6_local.sin6_family = AF_INET6; 915 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 916 sa6_local.sin6_addr = sa6->sin6_addr; 917 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 918 919 if (nflag) 920 flag |= NI_NUMERICHOST; 921 922 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 923 line, sizeof(line), NULL, 0, flag); 924 if (error) 925 strcpy(line, "invalid"); 926 927 return line; 928 } 929 #endif /*INET6*/ 930 931 /* 932 * Print routing statistics 933 */ 934 void 935 rt_stats(off) 936 u_long off; 937 { 938 struct rtstat rtstat; 939 940 if (off == 0) { 941 printf("rtstat: symbol not in namelist\n"); 942 return; 943 } 944 kread(off, (char *)&rtstat, sizeof (rtstat)); 945 printf("routing:\n"); 946 printf("\t%u bad routing redirect%s\n", 947 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 948 printf("\t%u dynamically created route%s\n", 949 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 950 printf("\t%u new gateway%s due to redirects\n", 951 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 952 printf("\t%u destination%s found unreachable\n", 953 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 954 printf("\t%u use%s of a wildcard route\n", 955 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 956 } 957 short ns_nullh[] = {0,0,0}; 958 short ns_bh[] = {-1,-1,-1}; 959 960 char * 961 ns_print(sa) 962 struct sockaddr *sa; 963 { 964 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 965 struct ns_addr work; 966 union { 967 union ns_net net_e; 968 u_long long_e; 969 } net; 970 u_short port; 971 static char mybuf[50], cport[10], chost[25]; 972 char *host = ""; 973 char *p; 974 u_char *q; 975 976 work = sns->sns_addr; 977 port = ntohs(work.x_port); 978 work.x_port = 0; 979 net.net_e = work.x_net; 980 if (ns_nullhost(work) && net.long_e == 0) { 981 if (port ) { 982 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 983 upHex(mybuf); 984 } else 985 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 986 return (mybuf); 987 } 988 989 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 990 host = "any"; 991 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 992 host = "*"; 993 } else { 994 q = work.x_host.c_host; 995 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 996 q[0], q[1], q[2], q[3], q[4], q[5]); 997 for (p = chost; *p == '0' && p < chost + 12; p++) 998 continue; 999 host = p; 1000 } 1001 if (port) 1002 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 1003 else 1004 *cport = 0; 1005 1006 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 1007 host, cport); 1008 upHex(mybuf); 1009 return (mybuf); 1010 } 1011 1012 char * 1013 ns_phost(sa) 1014 struct sockaddr *sa; 1015 { 1016 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1017 struct sockaddr_ns work; 1018 static union ns_net ns_zeronet; 1019 char *p; 1020 1021 work = *sns; 1022 work.sns_addr.x_port = 0; 1023 work.sns_addr.x_net = ns_zeronet; 1024 1025 p = ns_print((struct sockaddr *)&work); 1026 if (strncmp("0H.", p, 3) == 0) 1027 p += 3; 1028 return (p); 1029 } 1030 1031 void 1032 upHex(p0) 1033 char *p0; 1034 { 1035 char *p = p0; 1036 1037 for (; *p; p++) 1038 switch (*p) { 1039 case 'a': 1040 case 'b': 1041 case 'c': 1042 case 'd': 1043 case 'e': 1044 case 'f': 1045 *p += ('A' - 'a'); 1046 } 1047 } 1048
Indexes created Fri Sep 26 20:09:58 GMT 2025