route.c revision 1.48
1 /* $NetBSD: route.c,v 1.48 2000/01/17 18:03:51 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 1.48 2000/01/17 18:03:51 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 #ifdef INET6 144 char *netname6 __P((struct sockaddr_in6 *, struct in6_addr *)); 145 #endif 146 147 /* 148 * Print routing tables. 149 */ 150 void 151 routepr(rtree) 152 u_long rtree; 153 { 154 struct radix_node_head *rnh, head; 155 int i; 156 157 printf("Routing tables\n"); 158 159 if (Aflag == 0 && NewTree) 160 ntreestuff(); 161 else { 162 if (rtree == 0) { 163 printf("rt_tables: symbol not in namelist\n"); 164 return; 165 } 166 167 kget(rtree, rt_tables); 168 for (i = 0; i <= AF_MAX; i++) { 169 if ((rnh = rt_tables[i]) == 0) 170 continue; 171 kget(rnh, head); 172 if (i == AF_UNSPEC) { 173 if (Aflag && af == 0) { 174 printf("Netmasks:\n"); 175 p_tree(head.rnh_treetop); 176 } 177 } else if (af == AF_UNSPEC || af == i) { 178 pr_family(i); 179 do_rtent = 1; 180 pr_rthdr(i); 181 p_tree(head.rnh_treetop); 182 } 183 } 184 } 185 } 186 187 /* 188 * Print address family header before a section of the routing table. 189 */ 190 void 191 pr_family(af) 192 int af; 193 { 194 char *afname; 195 196 switch (af) { 197 case AF_INET: 198 afname = "Internet"; 199 break; 200 #ifdef INET6 201 case AF_INET6: 202 afname = "Internet6"; 203 break; 204 #endif 205 case AF_NS: 206 afname = "XNS"; 207 break; 208 case AF_ISO: 209 afname = "ISO"; 210 break; 211 case AF_APPLETALK: 212 afname = "AppleTalk"; 213 break; 214 case AF_CCITT: 215 afname = "X.25"; 216 break; 217 default: 218 afname = NULL; 219 break; 220 } 221 if (afname) 222 printf("\n%s:\n", afname); 223 else 224 printf("\nProtocol Family %d:\n", af); 225 } 226 227 /* column widths; each followed by one space */ 228 #ifndef INET6 229 #define WID_DST(af) 18 /* width of destination column */ 230 #define WID_GW(af) 18 /* width of gateway column */ 231 #else 232 /* width of destination/gateway column */ 233 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 234 #define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 29 : 18) : 18) 235 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 25 : 18) : 18) 236 #endif /* INET6 */ 237 238 /* 239 * Print header for routing table columns. 240 */ 241 void 242 pr_rthdr(af) 243 int af; 244 { 245 246 if (Aflag) 247 printf("%-8.8s ","Address"); 248 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 249 WID_DST(af), WID_DST(af), "Destination", 250 WID_GW(af), WID_GW(af), "Gateway", 251 "Flags", "Refs", "Use", "Mtu", "Interface"); 252 } 253 254 static struct sockaddr * 255 kgetsa(dst) 256 struct sockaddr *dst; 257 { 258 259 kget(dst, pt_u.u_sa); 260 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 261 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 262 return (&pt_u.u_sa); 263 } 264 265 static void 266 p_tree(rn) 267 struct radix_node *rn; 268 { 269 270 again: 271 kget(rn, rnode); 272 if (rnode.rn_b < 0) { 273 if (Aflag) 274 printf("%-8.8lx ", (u_long) rn); 275 if (rnode.rn_flags & RNF_ROOT) { 276 if (Aflag) 277 printf("(root node)%s", 278 rnode.rn_dupedkey ? " =>\n" : "\n"); 279 } else if (do_rtent) { 280 kget(rn, rtentry); 281 p_rtentry(&rtentry); 282 if (Aflag) 283 p_rtnode(); 284 } else { 285 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 286 NULL, 0, 44); 287 putchar('\n'); 288 } 289 if ((rn = rnode.rn_dupedkey) != NULL) 290 goto again; 291 } else { 292 if (Aflag && do_rtent) { 293 printf("%-8.8lx ", (u_long) rn); 294 p_rtnode(); 295 } 296 rn = rnode.rn_r; 297 p_tree(rnode.rn_l); 298 p_tree(rn); 299 } 300 } 301 302 static void 303 p_rtnode() 304 { 305 struct radix_mask *rm = rnode.rn_mklist; 306 char nbuf[20]; 307 308 if (rnode.rn_b < 0) { 309 if (rnode.rn_mask) { 310 printf("\t mask "); 311 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 312 NULL, 0, -1); 313 } else if (rm == 0) 314 return; 315 } else { 316 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 317 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 318 (u_long) rnode.rn_r); 319 } 320 while (rm) { 321 kget(rm, rmask); 322 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 323 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 324 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 325 if (rmask.rm_flags & RNF_NORMAL) { 326 struct radix_node rnode_aux; 327 printf(" <normal>, "); 328 kget(rmask.rm_leaf, rnode_aux); 329 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 330 NULL, 0, -1); 331 } else 332 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 333 NULL, 0, -1); 334 putchar('}'); 335 if ((rm = rmask.rm_mklist) != NULL) 336 printf(" ->"); 337 } 338 putchar('\n'); 339 } 340 341 static void 342 ntreestuff() 343 { 344 size_t needed; 345 int mib[6]; 346 char *buf, *next, *lim; 347 struct rt_msghdr *rtm; 348 349 mib[0] = CTL_NET; 350 mib[1] = PF_ROUTE; 351 mib[2] = 0; 352 mib[3] = 0; 353 mib[4] = NET_RT_DUMP; 354 mib[5] = 0; 355 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 356 err(1, "route sysctl estimate"); 357 if ((buf = malloc(needed)) == 0) 358 errx(1, "out of space"); 359 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 360 err(1, "sysctl of routing table"); 361 lim = buf + needed; 362 for (next = buf; next < lim; next += rtm->rtm_msglen) { 363 rtm = (struct rt_msghdr *)next; 364 np_rtentry(rtm); 365 } 366 } 367 368 static void 369 np_rtentry(rtm) 370 struct rt_msghdr *rtm; 371 { 372 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 373 #ifdef notdef 374 static int masks_done, banner_printed; 375 #endif 376 static int old_af; 377 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 378 379 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 380 return; 381 #ifdef notdef 382 /* for the moment, netmasks are skipped over */ 383 if (!banner_printed) { 384 printf("Netmasks:\n"); 385 banner_printed = 1; 386 } 387 if (masks_done == 0) { 388 if (rtm->rtm_addrs != RTA_DST ) { 389 masks_done = 1; 390 af = sa->sa_family; 391 } 392 } else 393 #endif 394 af = sa->sa_family; 395 if (af != old_af) { 396 pr_family(af); 397 old_af = af; 398 } 399 if (rtm->rtm_addrs == RTA_DST) 400 p_sockaddr(sa, NULL, 0, 36); 401 else { 402 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 403 #if 0 404 if (sa->sa_len == 0) 405 sa->sa_len = sizeof(long); 406 #endif 407 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 408 p_sockaddr(sa, NULL, 0, 18); 409 } 410 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 411 putchar('\n'); 412 } 413 414 static void 415 p_sockaddr(sa, mask, flags, width) 416 const struct sockaddr *sa, *mask; 417 int flags, width; 418 { 419 char workbuf[128], *cplim; 420 char *cp = workbuf; 421 422 switch(sa->sa_family) { 423 case AF_INET: 424 { 425 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 426 427 if ((sin->sin_addr.s_addr == INADDR_ANY) && 428 (mask != NULL) && 429 (((struct sockaddr_in *)mask)->sin_addr.s_addr == 0)) 430 cp = "default"; 431 else if (flags & RTF_HOST) 432 cp = routename(sin->sin_addr.s_addr); 433 else if (mask) 434 cp = netname(sin->sin_addr.s_addr, 435 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 436 else 437 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 438 break; 439 } 440 441 #ifdef INET6 442 case AF_INET6: 443 { 444 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 445 #ifdef KAME_SCOPEID 446 struct in6_addr *in6 = &sa6->sin6_addr; 447 448 /* 449 * XXX: This is a special workaround for KAME kernels. 450 * sin6_scope_id field of SA should be set in the future. 451 */ 452 if (IN6_IS_ADDR_LINKLOCAL(in6) || 453 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 454 /* XXX: override is ok? */ 455 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 456 *(u_short *)&in6->s6_addr[2] = 0; 457 } 458 #endif 459 460 if (flags & RTF_HOST) 461 cp = routename6(sa6); 462 else if (mask) { 463 cp = netname6(sa6, 464 &((struct sockaddr_in6 *)mask)->sin6_addr); 465 } else 466 cp = netname6(sa6, NULL); 467 break; 468 } 469 #endif 470 471 #ifndef SMALL 472 case AF_APPLETALK: 473 case 0: 474 { 475 if (!(flags & RTF_HOST) && mask) 476 cp = atalk_print2(sa,mask,11); 477 else 478 cp = atalk_print(sa,11); 479 break; 480 } 481 case AF_NS: 482 cp = ns_print((struct sockaddr *)sa); 483 break; 484 #endif 485 486 case AF_LINK: 487 { 488 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 489 490 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 491 sdl->sdl_slen == 0) 492 (void)snprintf(workbuf, sizeof workbuf, "link#%d", 493 sdl->sdl_index); 494 else switch (sdl->sdl_type) { 495 case IFT_FDDI: 496 case IFT_ETHER: 497 { 498 int i; 499 u_char *lla = (u_char *)sdl->sdl_data + 500 sdl->sdl_nlen; 501 502 cplim = ""; 503 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 504 /* XXX */ 505 cp += sprintf(cp, "%s%02x", cplim, *lla); 506 cplim = ":"; 507 } 508 cp = workbuf; 509 break; 510 } 511 default: 512 cp = link_ntoa(sdl); 513 break; 514 } 515 break; 516 } 517 518 default: 519 { 520 u_char *s = (u_char *)sa->sa_data, *slim; 521 522 slim = sa->sa_len + (u_char *) sa; 523 cplim = cp + sizeof(workbuf) - 6; 524 cp += sprintf(cp, "(%d)", sa->sa_family); 525 while (s < slim && cp < cplim) { 526 cp += sprintf(cp, " %02x", *s++); 527 if (s < slim) 528 cp += sprintf(cp, "%02x", *s++); 529 } 530 cp = workbuf; 531 } 532 } 533 if (width < 0 ) 534 printf("%s ", cp); 535 else { 536 if (nflag) 537 printf("%-*s ", width, cp); 538 else 539 printf("%-*.*s ", width, width, cp); 540 } 541 } 542 543 static void 544 p_flags(f, format) 545 int f; 546 char *format; 547 { 548 char name[33], *flags; 549 struct bits *p = bits; 550 551 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 552 if (p->b_mask & f) 553 *flags++ = p->b_val; 554 *flags = '\0'; 555 printf(format, name); 556 } 557 558 static struct sockaddr *sockcopy __P((struct sockaddr *, 559 union sockaddr_union *)); 560 561 /* 562 * copy a sockaddr into an allocated region, allocate at least sockaddr 563 * bytes and zero unused 564 */ 565 static struct sockaddr * 566 sockcopy(sp, dp) 567 struct sockaddr *sp; 568 union sockaddr_union *dp; 569 { 570 int len; 571 572 if (sp == 0 || sp->sa_len == 0) 573 (void)memset(dp, 0, sizeof (*sp)); 574 else { 575 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 576 (void)memcpy(dp, sp, len); 577 } 578 return ((struct sockaddr *)dp); 579 } 580 581 static void 582 p_rtentry(rt) 583 struct rtentry *rt; 584 { 585 static struct ifnet ifnet, *lastif; 586 union sockaddr_union addr_un, mask_un; 587 struct sockaddr *addr, *mask; 588 int af; 589 590 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 591 return; 592 593 memset(&addr_un, 0, sizeof(addr_un)); 594 memset(&mask_un, 0, sizeof(mask_un)); 595 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 596 af = addr->sa_family; 597 if (rt_mask(rt)) 598 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 599 else 600 mask = sockcopy(NULL, &mask_un); 601 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 602 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 603 p_flags(rt->rt_flags, "%-6.6s "); 604 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 605 if (rt->rt_rmx.rmx_mtu) 606 printf("%6lu", rt->rt_rmx.rmx_mtu); 607 else 608 printf("%6s", "-"); 609 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 610 if (rt->rt_ifp) { 611 if (rt->rt_ifp != lastif) { 612 kget(rt->rt_ifp, ifnet); 613 lastif = rt->rt_ifp; 614 } 615 printf(" %.16s%s", ifnet.if_xname, 616 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 617 } 618 putchar('\n'); 619 if (vflag) { 620 printf("\texpire %10lu%c recvpipe %10ld%c " 621 "sendpipe %10ld%c\n", 622 rt->rt_rmx.rmx_expire, 623 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 624 rt->rt_rmx.rmx_recvpipe, 625 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 626 rt->rt_rmx.rmx_sendpipe, 627 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 628 printf("\tssthresh %10lu%c rtt %10ld%c " 629 "rttvar %10ld%c\n", 630 rt->rt_rmx.rmx_ssthresh, 631 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 632 rt->rt_rmx.rmx_rtt, 633 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 634 rt->rt_rmx.rmx_rttvar, 635 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 636 } 637 638 } 639 640 char * 641 routename(in) 642 u_int32_t in; 643 { 644 char *cp; 645 static char line[MAXHOSTNAMELEN + 1]; 646 struct hostent *hp; 647 static char domain[MAXHOSTNAMELEN + 1]; 648 static int first = 1; 649 650 if (first) { 651 first = 0; 652 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 653 domain[sizeof(domain) - 1] = '\0'; 654 if ((cp = strchr(domain, '.'))) 655 (void)strcpy(domain, cp + 1); 656 else 657 domain[0] = 0; 658 } else 659 domain[0] = 0; 660 } 661 cp = 0; 662 if (!nflag) { 663 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 664 AF_INET); 665 if (hp) { 666 if ((cp = strchr(hp->h_name, '.')) && 667 !strcmp(cp + 1, domain)) 668 *cp = 0; 669 cp = hp->h_name; 670 } 671 } 672 if (cp) { 673 strncpy(line, cp, sizeof(line) - 1); 674 line[sizeof(line) - 1] = '\0'; 675 } else { 676 #define C(x) ((x) & 0xff) 677 in = ntohl(in); 678 snprintf(line, sizeof line, "%u.%u.%u.%u", 679 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 680 } 681 return (line); 682 } 683 684 static u_long 685 forgemask(a) 686 u_long a; 687 { 688 u_long m; 689 690 if (IN_CLASSA(a)) 691 m = IN_CLASSA_NET; 692 else if (IN_CLASSB(a)) 693 m = IN_CLASSB_NET; 694 else 695 m = IN_CLASSC_NET; 696 return (m); 697 } 698 699 static void 700 domask(dst, dlen, addr, mask) 701 char *dst; 702 size_t dlen; 703 u_long addr, mask; 704 { 705 int b, i; 706 707 if (!mask || (forgemask(addr) == mask)) { 708 *dst = '\0'; 709 return; 710 } 711 i = 0; 712 for (b = 0; b < 32; b++) 713 if (mask & (1 << b)) { 714 int bb; 715 716 i = b; 717 for (bb = b+1; bb < 32; bb++) 718 if (!(mask & (1 << bb))) { 719 i = -1; /* noncontig */ 720 break; 721 } 722 break; 723 } 724 if (i == -1) 725 (void)snprintf(dst, dlen, "&0x%lx", mask); 726 else 727 (void)snprintf(dst, dlen, "/%d", 32-i); 728 } 729 730 /* 731 * Return the name of the network whose address is given. 732 * The address is assumed to be that of a net or subnet, not a host. 733 */ 734 char * 735 netname(in, mask) 736 u_int32_t in, mask; 737 { 738 char *cp = 0; 739 static char line[MAXHOSTNAMELEN + 4]; 740 struct netent *np = 0; 741 u_int32_t net, omask; 742 u_int32_t i; 743 int subnetshift; 744 745 i = ntohl(in); 746 omask = mask = ntohl(mask); 747 if (!nflag && i != INADDR_ANY) { 748 if (mask == INADDR_ANY) { 749 switch (mask = forgemask(i)) { 750 case IN_CLASSA_NET: 751 subnetshift = 8; 752 break; 753 case IN_CLASSB_NET: 754 subnetshift = 8; 755 break; 756 case IN_CLASSC_NET: 757 subnetshift = 4; 758 break; 759 default: 760 abort(); 761 } 762 /* 763 * If there are more bits than the standard mask 764 * would suggest, subnets must be in use. 765 * Guess at the subnet mask, assuming reasonable 766 * width subnet fields. 767 */ 768 while (i &~ mask) 769 mask = (long)mask >> subnetshift; 770 } 771 net = i & mask; 772 /* 773 * Note: shift the hosts bits out in octet units, since 774 * not all versions of getnetbyaddr() do this for us (e.g. 775 * the current `etc/networks' parser). 776 */ 777 while ((mask & 0xff) == 0) 778 mask >>= 8, net >>= 8; 779 np = getnetbyaddr(net, AF_INET); 780 if (np) 781 cp = np->n_name; 782 } 783 if (cp) 784 strncpy(line, cp, sizeof(line) - 1); 785 else if ((i & 0xffffff) == 0) 786 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 787 else if ((i & 0xffff) == 0) 788 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 789 , C(i >> 16)); 790 else if ((i & 0xff) == 0) 791 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 792 C(i >> 16), C(i >> 8)); 793 else 794 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 795 C(i >> 16), C(i >> 8), C(i)); 796 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 797 return (line); 798 } 799 800 #ifdef INET6 801 char * 802 netname6(sa6, mask) 803 struct sockaddr_in6 *sa6; 804 struct in6_addr *mask; 805 { 806 static char line[NI_MAXHOST]; 807 u_char *p, *q; 808 u_char *lim; 809 int masklen, final = 0, illegal = 0; 810 #ifdef KAME_SCOPEID 811 int flag = NI_WITHSCOPEID; 812 #else 813 int flag = 0; 814 #endif 815 int error; 816 struct sockaddr_in6 sin6; 817 818 sin6 = *sa6; 819 if (mask) { 820 masklen = 0; 821 lim = (u_char *)mask + 16; 822 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 823 p < lim; 824 p++, q++) { 825 if (final && *p) { 826 illegal++; 827 *q = 0; 828 continue; 829 } 830 831 switch (*p & 0xff) { 832 case 0xff: 833 masklen += 8; 834 break; 835 case 0xfe: 836 masklen += 7; 837 final++; 838 break; 839 case 0xfc: 840 masklen += 6; 841 final++; 842 break; 843 case 0xf8: 844 masklen += 5; 845 final++; 846 break; 847 case 0xf0: 848 masklen += 4; 849 final++; 850 break; 851 case 0xe0: 852 masklen += 3; 853 final++; 854 break; 855 case 0xc0: 856 masklen += 2; 857 final++; 858 break; 859 case 0x80: 860 masklen += 1; 861 final++; 862 break; 863 case 0x00: 864 final++; 865 break; 866 default: 867 final++; 868 illegal++; 869 break; 870 } 871 872 if (!illegal) 873 *q &= *p; 874 else 875 *q = 0; 876 } 877 } 878 else 879 masklen = 128; 880 881 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 882 return("default"); 883 884 if (illegal) 885 fprintf(stderr, "illegal prefixlen\n"); 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 Wed Sep 24 02:09:48 GMT 2025