route.c revision 1.50
1 /* $NetBSD: route.c,v 1.50 2000/10/11 14:46:15 is 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 1.50 2000/10/11 14:46:15 is 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)); 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); 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) 548 int f; 549 { 550 char name[33], *flags; 551 struct bits *p = bits; 552 553 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 554 if (p->b_mask & f) 555 *flags++ = p->b_val; 556 *flags = '\0'; 557 printf("%-6.6s ", name); 558 } 559 560 static struct sockaddr *sockcopy __P((struct sockaddr *, 561 union sockaddr_union *)); 562 563 /* 564 * copy a sockaddr into an allocated region, allocate at least sockaddr 565 * bytes and zero unused 566 */ 567 static struct sockaddr * 568 sockcopy(sp, dp) 569 struct sockaddr *sp; 570 union sockaddr_union *dp; 571 { 572 int len; 573 574 if (sp == 0 || sp->sa_len == 0) 575 (void)memset(dp, 0, sizeof (*sp)); 576 else { 577 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 578 (void)memcpy(dp, sp, len); 579 } 580 return ((struct sockaddr *)dp); 581 } 582 583 static void 584 p_rtentry(rt) 585 struct rtentry *rt; 586 { 587 static struct ifnet ifnet, *lastif; 588 union sockaddr_union addr_un, mask_un; 589 struct sockaddr *addr, *mask; 590 int af; 591 592 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 593 return; 594 595 memset(&addr_un, 0, sizeof(addr_un)); 596 memset(&mask_un, 0, sizeof(mask_un)); 597 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 598 af = addr->sa_family; 599 if (rt_mask(rt)) 600 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 601 else 602 mask = sockcopy(NULL, &mask_un); 603 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 604 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 605 p_flags(rt->rt_flags); 606 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 607 if (rt->rt_rmx.rmx_mtu) 608 printf("%6lu", rt->rt_rmx.rmx_mtu); 609 else 610 printf("%6s", "-"); 611 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 612 if (rt->rt_ifp) { 613 if (rt->rt_ifp != lastif) { 614 kget(rt->rt_ifp, ifnet); 615 lastif = rt->rt_ifp; 616 } 617 printf(" %.16s%s", ifnet.if_xname, 618 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 619 } 620 putchar('\n'); 621 if (vflag) { 622 printf("\texpire %10lu%c recvpipe %10ld%c " 623 "sendpipe %10ld%c\n", 624 rt->rt_rmx.rmx_expire, 625 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 626 rt->rt_rmx.rmx_recvpipe, 627 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 628 rt->rt_rmx.rmx_sendpipe, 629 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 630 printf("\tssthresh %10lu%c rtt %10ld%c " 631 "rttvar %10ld%c\n", 632 rt->rt_rmx.rmx_ssthresh, 633 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 634 rt->rt_rmx.rmx_rtt, 635 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 636 rt->rt_rmx.rmx_rttvar, 637 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 638 } 639 640 } 641 642 char * 643 routename(in) 644 u_int32_t in; 645 { 646 char *cp; 647 static char line[MAXHOSTNAMELEN + 1]; 648 struct hostent *hp; 649 static char domain[MAXHOSTNAMELEN + 1]; 650 static int first = 1; 651 652 if (first) { 653 first = 0; 654 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 655 domain[sizeof(domain) - 1] = '\0'; 656 if ((cp = strchr(domain, '.'))) 657 (void)strcpy(domain, cp + 1); 658 else 659 domain[0] = 0; 660 } else 661 domain[0] = 0; 662 } 663 cp = 0; 664 if (!nflag) { 665 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 666 AF_INET); 667 if (hp) { 668 if ((cp = strchr(hp->h_name, '.')) && 669 !strcmp(cp + 1, domain)) 670 *cp = 0; 671 cp = hp->h_name; 672 } 673 } 674 if (cp) { 675 strncpy(line, cp, sizeof(line) - 1); 676 line[sizeof(line) - 1] = '\0'; 677 } else { 678 #define C(x) ((x) & 0xff) 679 in = ntohl(in); 680 snprintf(line, sizeof line, "%u.%u.%u.%u", 681 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 682 } 683 return (line); 684 } 685 686 static u_long 687 forgemask(a) 688 u_long a; 689 { 690 u_long m; 691 692 if (IN_CLASSA(a)) 693 m = IN_CLASSA_NET; 694 else if (IN_CLASSB(a)) 695 m = IN_CLASSB_NET; 696 else 697 m = IN_CLASSC_NET; 698 return (m); 699 } 700 701 static void 702 domask(dst, dlen, addr, mask) 703 char *dst; 704 size_t dlen; 705 u_long addr, mask; 706 { 707 int b, i; 708 709 if (!mask || (forgemask(addr) == mask)) { 710 *dst = '\0'; 711 return; 712 } 713 i = 0; 714 for (b = 0; b < 32; b++) 715 if (mask & (1 << b)) { 716 int bb; 717 718 i = b; 719 for (bb = b+1; bb < 32; bb++) 720 if (!(mask & (1 << bb))) { 721 i = -1; /* noncontig */ 722 break; 723 } 724 break; 725 } 726 if (i == -1) 727 (void)snprintf(dst, dlen, "&0x%lx", mask); 728 else 729 (void)snprintf(dst, dlen, "/%d", 32-i); 730 } 731 732 /* 733 * Return the name of the network whose address is given. 734 * The address is assumed to be that of a net or subnet, not a host. 735 */ 736 char * 737 netname(in, mask) 738 u_int32_t in, mask; 739 { 740 char *cp = 0; 741 static char line[MAXHOSTNAMELEN + 4]; 742 struct netent *np = 0; 743 u_int32_t net, omask; 744 u_int32_t i; 745 int subnetshift; 746 747 i = ntohl(in); 748 omask = mask = ntohl(mask); 749 if (!nflag && i != INADDR_ANY) { 750 if (mask == INADDR_ANY) { 751 switch (mask = forgemask(i)) { 752 case IN_CLASSA_NET: 753 subnetshift = 8; 754 break; 755 case IN_CLASSB_NET: 756 subnetshift = 8; 757 break; 758 case IN_CLASSC_NET: 759 subnetshift = 4; 760 break; 761 default: 762 abort(); 763 } 764 /* 765 * If there are more bits than the standard mask 766 * would suggest, subnets must be in use. 767 * Guess at the subnet mask, assuming reasonable 768 * width subnet fields. 769 */ 770 while (i &~ mask) 771 mask = (long)mask >> subnetshift; 772 } 773 net = i & mask; 774 /* 775 * Note: shift the hosts bits out in octet units, since 776 * not all versions of getnetbyaddr() do this for us (e.g. 777 * the current `etc/networks' parser). 778 */ 779 while ((mask & 0xff) == 0) 780 mask >>= 8, net >>= 8; 781 np = getnetbyaddr(net, AF_INET); 782 if (np) 783 cp = np->n_name; 784 } 785 if (cp) 786 strncpy(line, cp, sizeof(line) - 1); 787 else if ((i & 0xffffff) == 0) 788 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 789 else if ((i & 0xffff) == 0) 790 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 791 , C(i >> 16)); 792 else if ((i & 0xff) == 0) 793 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 794 C(i >> 16), C(i >> 8)); 795 else 796 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 797 C(i >> 16), C(i >> 8), C(i)); 798 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 799 return (line); 800 } 801 802 #ifdef INET6 803 char * 804 netname6(sa6, mask) 805 struct sockaddr_in6 *sa6; 806 struct in6_addr *mask; 807 { 808 static char line[NI_MAXHOST]; 809 u_char *p, *q; 810 u_char *lim; 811 int masklen, final = 0, illegal = 0; 812 #ifdef KAME_SCOPEID 813 int flag = NI_WITHSCOPEID; 814 #else 815 int flag = 0; 816 #endif 817 int error; 818 struct sockaddr_in6 sin6; 819 820 sin6 = *sa6; 821 if (mask) { 822 masklen = 0; 823 lim = (u_char *)(mask + 1); 824 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 825 p < lim; 826 p++, q++) { 827 if (final && *p) { 828 illegal++; 829 *q = 0; 830 continue; 831 } 832 833 switch (*p & 0xff) { 834 case 0xff: 835 masklen += 8; 836 break; 837 case 0xfe: 838 masklen += 7; 839 final++; 840 break; 841 case 0xfc: 842 masklen += 6; 843 final++; 844 break; 845 case 0xf8: 846 masklen += 5; 847 final++; 848 break; 849 case 0xf0: 850 masklen += 4; 851 final++; 852 break; 853 case 0xe0: 854 masklen += 3; 855 final++; 856 break; 857 case 0xc0: 858 masklen += 2; 859 final++; 860 break; 861 case 0x80: 862 masklen += 1; 863 final++; 864 break; 865 case 0x00: 866 final++; 867 break; 868 default: 869 final++; 870 illegal++; 871 break; 872 } 873 874 if (!illegal) 875 *q &= *p; 876 else 877 *q = 0; 878 } 879 } else 880 masklen = 128; 881 882 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 883 return("default"); 884 885 if (nflag) 886 flag |= NI_NUMERICHOST; 887 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 888 line, sizeof(line), NULL, 0, flag); 889 if (error) 890 strcpy(line, "invalid"); 891 892 if (nflag) 893 sprintf(&line[strlen(line)], "/%d", masklen); 894 895 return line; 896 } 897 898 char * 899 routename6(sa6) 900 struct sockaddr_in6 *sa6; 901 { 902 static char line[NI_MAXHOST]; 903 #ifdef KAME_SCOPEID 904 int flag = NI_WITHSCOPEID; 905 #else 906 int flag = 0; 907 #endif 908 /* use local variable for safety */ 909 struct sockaddr_in6 sa6_local; 910 int error; 911 912 memset(&sa6_local, 0, sizeof(sa6_local)); 913 sa6_local.sin6_family = AF_INET6; 914 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 915 sa6_local.sin6_addr = sa6->sin6_addr; 916 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 917 918 if (nflag) 919 flag |= NI_NUMERICHOST; 920 921 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 922 line, sizeof(line), NULL, 0, flag); 923 if (error) 924 strcpy(line, "invalid"); 925 926 return line; 927 } 928 #endif /*INET6*/ 929 930 /* 931 * Print routing statistics 932 */ 933 void 934 rt_stats(off) 935 u_long off; 936 { 937 struct rtstat rtstat; 938 939 if (off == 0) { 940 printf("rtstat: symbol not in namelist\n"); 941 return; 942 } 943 kread(off, (char *)&rtstat, sizeof (rtstat)); 944 printf("routing:\n"); 945 printf("\t%u bad routing redirect%s\n", 946 rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); 947 printf("\t%u dynamically created route%s\n", 948 rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); 949 printf("\t%u new gateway%s due to redirects\n", 950 rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); 951 printf("\t%u destination%s found unreachable\n", 952 rtstat.rts_unreach, plural(rtstat.rts_unreach)); 953 printf("\t%u use%s of a wildcard route\n", 954 rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); 955 } 956 short ns_nullh[] = {0,0,0}; 957 short ns_bh[] = {-1,-1,-1}; 958 959 char * 960 ns_print(sa) 961 struct sockaddr *sa; 962 { 963 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 964 struct ns_addr work; 965 union { 966 union ns_net net_e; 967 u_long long_e; 968 } net; 969 u_short port; 970 static char mybuf[50], cport[10], chost[25]; 971 char *host = ""; 972 char *p; 973 u_char *q; 974 975 work = sns->sns_addr; 976 port = ntohs(work.x_port); 977 work.x_port = 0; 978 net.net_e = work.x_net; 979 if (ns_nullhost(work) && net.long_e == 0) { 980 if (port ) { 981 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 982 upHex(mybuf); 983 } else 984 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 985 return (mybuf); 986 } 987 988 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 989 host = "any"; 990 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 991 host = "*"; 992 } else { 993 q = work.x_host.c_host; 994 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 995 q[0], q[1], q[2], q[3], q[4], q[5]); 996 for (p = chost; *p == '0' && p < chost + 12; p++) 997 continue; 998 host = p; 999 } 1000 if (port) 1001 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 1002 else 1003 *cport = 0; 1004 1005 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 1006 host, cport); 1007 upHex(mybuf); 1008 return (mybuf); 1009 } 1010 1011 char * 1012 ns_phost(sa) 1013 struct sockaddr *sa; 1014 { 1015 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1016 struct sockaddr_ns work; 1017 static union ns_net ns_zeronet; 1018 char *p; 1019 1020 work = *sns; 1021 work.sns_addr.x_port = 0; 1022 work.sns_addr.x_net = ns_zeronet; 1023 1024 p = ns_print((struct sockaddr *)&work); 1025 if (strncmp("0H.", p, 3) == 0) 1026 p += 3; 1027 return (p); 1028 } 1029 1030 void 1031 upHex(p0) 1032 char *p0; 1033 { 1034 char *p = p0; 1035 1036 for (; *p; p++) 1037 switch (*p) { 1038 case 'a': 1039 case 'b': 1040 case 'c': 1041 case 'd': 1042 case 'e': 1043 case 'f': 1044 *p += ('A' - 'a'); 1045 } 1046 } 1047
Indexes created Wed Sep 24 05:09:52 GMT 2025