route.c revision 1.63
1 /* $NetBSD: route.c,v 1.63 2003/08/07 11:15:21 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "from: @(#)route.c 8.3 (Berkeley) 3/9/94"; 36 #else 37 __RCSID("$NetBSD: route.c,v 1.63 2003/08/07 11:15:21 agc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/mbuf.h> 45 #include <sys/un.h> 46 47 #include <net/if.h> 48 #include <net/if_dl.h> 49 #include <net/if_types.h> 50 #define _KERNEL 51 #include <net/route.h> 52 #undef _KERNEL 53 #include <netinet/in.h> 54 #include <netatalk/at.h> 55 #include <netiso/iso.h> 56 57 #include <netns/ns.h> 58 59 #include <sys/sysctl.h> 60 61 #include <arpa/inet.h> 62 63 #include <err.h> 64 #include <netdb.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 70 #include "netstat.h" 71 72 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d))) 73 74 /* alignment constraint for routing socket */ 75 #define ROUNDUP(a) \ 76 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 77 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 78 79 /* 80 * Definitions for showing gateway flags. 81 */ 82 struct bits { 83 short b_mask; 84 char b_val; 85 } bits[] = { 86 { RTF_UP, 'U' }, 87 { RTF_GATEWAY, 'G' }, 88 { RTF_HOST, 'H' }, 89 { RTF_REJECT, 'R' }, 90 { RTF_DYNAMIC, 'D' }, 91 { RTF_MODIFIED, 'M' }, 92 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 93 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */ 94 { RTF_CLONING, 'C' }, 95 { RTF_XRESOLVE, 'X' }, 96 { RTF_LLINFO, 'L' }, 97 { RTF_STATIC, 'S' }, 98 { RTF_BLACKHOLE,'B' }, 99 { RTF_CLONED, 'c' }, 100 { RTF_PROTO1, '1' }, 101 { RTF_PROTO2, '2' }, 102 { 0 } 103 }; 104 105 /* 106 * XXX we put all of the sockaddr types in here to force the alignment 107 * to be correct. 108 */ 109 static union sockaddr_union { 110 struct sockaddr u_sa; 111 struct sockaddr_in u_in; 112 struct sockaddr_un u_un; 113 struct sockaddr_iso u_iso; 114 struct sockaddr_at u_at; 115 struct sockaddr_dl u_dl; 116 struct sockaddr_ns u_ns; 117 u_short u_data[128]; 118 int u_dummy; /* force word-alignment */ 119 } pt_u; 120 121 int do_rtent = 0; 122 struct rtentry rtentry; 123 struct radix_node rnode; 124 struct radix_mask rmask; 125 126 int NewTree = 0; 127 128 static struct sockaddr *kgetsa __P((struct sockaddr *)); 129 static void p_tree __P((struct radix_node *)); 130 static void p_rtnode __P((void)); 131 static void ntreestuff __P((void)); 132 static void np_rtentry __P((struct rt_msghdr *)); 133 static void p_sockaddr __P((const struct sockaddr *, 134 const struct sockaddr *, int, int)); 135 static void p_flags __P((int)); 136 static void p_rtentry __P((struct rtentry *)); 137 static void ntreestuff __P((void)); 138 static u_long forgemask __P((u_long)); 139 static void domask __P((char *, size_t, u_long, u_long)); 140 141 /* 142 * Print routing tables. 143 */ 144 void 145 routepr(rtree) 146 u_long rtree; 147 { 148 struct radix_node_head *rnh, head; 149 struct radix_node_head *rt_tables[AF_MAX+1]; 150 int i; 151 152 printf("Routing tables\n"); 153 154 if (Aflag == 0 && NewTree) 155 ntreestuff(); 156 else { 157 if (rtree == 0) { 158 printf("rt_tables: symbol not in namelist\n"); 159 return; 160 } 161 162 kget(rtree, rt_tables); 163 for (i = 0; i <= AF_MAX; i++) { 164 if ((rnh = rt_tables[i]) == 0) 165 continue; 166 kget(rnh, head); 167 if (i == AF_UNSPEC) { 168 if (Aflag && af == 0) { 169 printf("Netmasks:\n"); 170 p_tree(head.rnh_treetop); 171 } 172 } else if (af == AF_UNSPEC || af == i) { 173 pr_family(i); 174 do_rtent = 1; 175 pr_rthdr(i); 176 p_tree(head.rnh_treetop); 177 } 178 } 179 } 180 } 181 182 /* 183 * Print address family header before a section of the routing table. 184 */ 185 void 186 pr_family(af) 187 int af; 188 { 189 char *afname; 190 191 switch (af) { 192 case AF_INET: 193 afname = "Internet"; 194 break; 195 #ifdef INET6 196 case AF_INET6: 197 afname = "Internet6"; 198 break; 199 #endif 200 case AF_NS: 201 afname = "XNS"; 202 break; 203 case AF_ISO: 204 afname = "ISO"; 205 break; 206 case AF_APPLETALK: 207 afname = "AppleTalk"; 208 break; 209 case AF_CCITT: 210 afname = "X.25"; 211 break; 212 default: 213 afname = NULL; 214 break; 215 } 216 if (afname) 217 printf("\n%s:\n", afname); 218 else 219 printf("\nProtocol Family %d:\n", af); 220 } 221 222 /* column widths; each followed by one space */ 223 #ifndef INET6 224 #define WID_DST(af) 18 /* width of destination column */ 225 #define WID_GW(af) 18 /* width of gateway column */ 226 #else 227 /* width of destination/gateway column */ 228 #if 1 229 /* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 */ 230 #define WID_DST(af) ((af) == AF_INET6 ? (numeric_addr ? 34 : 18) : 18) 231 #define WID_GW(af) ((af) == AF_INET6 ? (numeric_addr ? 30 : 18) : 18) 232 #else 233 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 234 #define WID_DST(af) ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18) 235 #define WID_GW(af) ((af) == AF_INET6 ? (numeric_addr ? 25 : 18) : 18) 236 #endif 237 #endif /* INET6 */ 238 239 /* 240 * Print header for routing table columns. 241 */ 242 void 243 pr_rthdr(af) 244 int af; 245 { 246 247 if (Aflag) 248 printf("%-8.8s ","Address"); 249 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 250 WID_DST(af), WID_DST(af), "Destination", 251 WID_GW(af), WID_GW(af), "Gateway", 252 "Flags", "Refs", "Use", "Mtu", "Interface"); 253 } 254 255 static struct sockaddr * 256 kgetsa(dst) 257 struct sockaddr *dst; 258 { 259 260 kget(dst, pt_u.u_sa); 261 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 262 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 263 return (&pt_u.u_sa); 264 } 265 266 static void 267 p_tree(rn) 268 struct radix_node *rn; 269 { 270 271 again: 272 kget(rn, rnode); 273 if (rnode.rn_b < 0) { 274 if (Aflag) 275 printf("%-8.8lx ", (u_long) rn); 276 if (rnode.rn_flags & RNF_ROOT) { 277 if (Aflag) 278 printf("(root node)%s", 279 rnode.rn_dupedkey ? " =>\n" : "\n"); 280 } else if (do_rtent) { 281 kget(rn, rtentry); 282 p_rtentry(&rtentry); 283 if (Aflag) 284 p_rtnode(); 285 } else { 286 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 287 NULL, 0, 44); 288 putchar('\n'); 289 } 290 if ((rn = rnode.rn_dupedkey) != NULL) 291 goto again; 292 } else { 293 if (Aflag && do_rtent) { 294 printf("%-8.8lx ", (u_long) rn); 295 p_rtnode(); 296 } 297 rn = rnode.rn_r; 298 p_tree(rnode.rn_l); 299 p_tree(rn); 300 } 301 } 302 303 static void 304 p_rtnode() 305 { 306 struct radix_mask *rm = rnode.rn_mklist; 307 char nbuf[20]; 308 309 if (rnode.rn_b < 0) { 310 if (rnode.rn_mask) { 311 printf("\t mask "); 312 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 313 NULL, 0, -1); 314 } else if (rm == 0) 315 return; 316 } else { 317 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 318 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 319 (u_long) rnode.rn_r); 320 } 321 while (rm) { 322 kget(rm, rmask); 323 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 324 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 325 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 326 if (rmask.rm_flags & RNF_NORMAL) { 327 struct radix_node rnode_aux; 328 printf(" <normal>, "); 329 kget(rmask.rm_leaf, rnode_aux); 330 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 331 NULL, 0, -1); 332 } else 333 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 334 NULL, 0, -1); 335 putchar('}'); 336 if ((rm = rmask.rm_mklist) != NULL) 337 printf(" ->"); 338 } 339 putchar('\n'); 340 } 341 342 static void 343 ntreestuff() 344 { 345 size_t needed; 346 int mib[6]; 347 char *buf, *next, *lim; 348 struct rt_msghdr *rtm; 349 350 mib[0] = CTL_NET; 351 mib[1] = PF_ROUTE; 352 mib[2] = 0; 353 mib[3] = 0; 354 mib[4] = NET_RT_DUMP; 355 mib[5] = 0; 356 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 357 err(1, "route sysctl estimate"); 358 if ((buf = malloc(needed)) == 0) 359 errx(1, "out of space"); 360 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 361 err(1, "sysctl of routing table"); 362 lim = buf + needed; 363 for (next = buf; next < lim; next += rtm->rtm_msglen) { 364 rtm = (struct rt_msghdr *)next; 365 np_rtentry(rtm); 366 } 367 } 368 369 static void 370 np_rtentry(rtm) 371 struct rt_msghdr *rtm; 372 { 373 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 374 #ifdef notdef 375 static int masks_done, banner_printed; 376 #endif 377 static int old_af; 378 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 379 380 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 381 return; 382 #ifdef notdef 383 /* for the moment, netmasks are skipped over */ 384 if (!banner_printed) { 385 printf("Netmasks:\n"); 386 banner_printed = 1; 387 } 388 if (masks_done == 0) { 389 if (rtm->rtm_addrs != RTA_DST ) { 390 masks_done = 1; 391 af = sa->sa_family; 392 } 393 } else 394 #endif 395 af = sa->sa_family; 396 if (af != old_af) { 397 pr_family(af); 398 old_af = af; 399 } 400 if (rtm->rtm_addrs == RTA_DST) 401 p_sockaddr(sa, NULL, 0, 36); 402 else { 403 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 404 #if 0 405 if (sa->sa_len == 0) 406 sa->sa_len = sizeof(long); 407 #endif 408 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 409 p_sockaddr(sa, NULL, 0, 18); 410 } 411 p_flags(rtm->rtm_flags & interesting); 412 putchar('\n'); 413 } 414 415 static void 416 p_sockaddr(sa, mask, flags, width) 417 const struct sockaddr *sa, *mask; 418 int flags, width; 419 { 420 char workbuf[128], *cplim; 421 char *cp = workbuf; 422 char *ep = workbuf + sizeof(workbuf); 423 int n; 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__ 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 if (getnameinfo(sa, sa->sa_len, workbuf, sizeof(workbuf), 491 NULL, 0, NI_NUMERICHOST) != 0) 492 strlcpy(workbuf, "invalid", sizeof(workbuf)); 493 cp = workbuf; 494 break; 495 496 default: 497 { 498 u_char *s = (u_char *)sa->sa_data, *slim; 499 500 slim = sa->sa_len + (u_char *) sa; 501 cplim = cp + sizeof(workbuf) - 6; 502 n = snprintf(cp, ep - cp, "(%d)", sa->sa_family); 503 if (n >= ep - cp) 504 n = ep - cp - 1; 505 if (n > 0) 506 cp += n; 507 while (s < slim && cp < cplim) { 508 n = snprintf(cp, ep - cp, " %02x", *s++); 509 if (n >= ep - cp) 510 n = ep - cp - 1; 511 if (n > 0) 512 cp += n; 513 if (s < slim) { 514 n = snprintf(cp, ep - cp, "%02x", *s++); 515 if (n >= ep - cp) 516 n = ep - cp - 1; 517 if (n > 0) 518 cp += n; 519 } 520 } 521 cp = workbuf; 522 } 523 } 524 if (width < 0 ) 525 printf("%s ", cp); 526 else { 527 if (numeric_addr) 528 printf("%-*s ", width, cp); 529 else 530 printf("%-*.*s ", width, width, cp); 531 } 532 } 533 534 static void 535 p_flags(f) 536 int f; 537 { 538 char name[33], *flags; 539 struct bits *p = bits; 540 541 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 542 if (p->b_mask & f) 543 *flags++ = p->b_val; 544 *flags = '\0'; 545 printf("%-6.6s ", name); 546 } 547 548 static struct sockaddr *sockcopy __P((struct sockaddr *, 549 union sockaddr_union *)); 550 551 /* 552 * copy a sockaddr into an allocated region, allocate at least sockaddr 553 * bytes and zero unused 554 */ 555 static struct sockaddr * 556 sockcopy(sp, dp) 557 struct sockaddr *sp; 558 union sockaddr_union *dp; 559 { 560 int len; 561 562 if (sp == 0 || sp->sa_len == 0) 563 (void)memset(dp, 0, sizeof (*sp)); 564 else { 565 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 566 (void)memcpy(dp, sp, len); 567 } 568 return ((struct sockaddr *)dp); 569 } 570 571 static void 572 p_rtentry(rt) 573 struct rtentry *rt; 574 { 575 static struct ifnet ifnet, *lastif; 576 union sockaddr_union addr_un, mask_un; 577 struct sockaddr *addr, *mask; 578 int af; 579 580 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 581 return; 582 583 memset(&addr_un, 0, sizeof(addr_un)); 584 memset(&mask_un, 0, sizeof(mask_un)); 585 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 586 af = addr->sa_family; 587 if (rt_mask(rt)) 588 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 589 else 590 mask = sockcopy(NULL, &mask_un); 591 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 592 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 593 p_flags(rt->rt_flags); 594 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 595 if (rt->rt_rmx.rmx_mtu) 596 printf("%6lu", rt->rt_rmx.rmx_mtu); 597 else 598 printf("%6s", "-"); 599 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 600 if (rt->rt_ifp) { 601 if (rt->rt_ifp != lastif) { 602 kget(rt->rt_ifp, ifnet); 603 lastif = rt->rt_ifp; 604 } 605 printf(" %.16s%s", ifnet.if_xname, 606 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 607 } 608 putchar('\n'); 609 if (vflag) { 610 printf("\texpire %10lu%c recvpipe %10ld%c " 611 "sendpipe %10ld%c\n", 612 rt->rt_rmx.rmx_expire, 613 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 614 rt->rt_rmx.rmx_recvpipe, 615 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 616 rt->rt_rmx.rmx_sendpipe, 617 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 618 printf("\tssthresh %10lu%c rtt %10ld%c " 619 "rttvar %10ld%c\n", 620 rt->rt_rmx.rmx_ssthresh, 621 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 622 rt->rt_rmx.rmx_rtt, 623 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 624 rt->rt_rmx.rmx_rttvar, 625 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 626 printf("\thopcount %10lu%c\n", 627 rt->rt_rmx.rmx_hopcount, 628 (rt->rt_rmx.rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 629 } 630 } 631 632 char * 633 routename(in) 634 u_int32_t in; 635 { 636 char *cp; 637 static char line[MAXHOSTNAMELEN + 1]; 638 struct hostent *hp; 639 static char domain[MAXHOSTNAMELEN + 1]; 640 static int first = 1; 641 642 if (first) { 643 first = 0; 644 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 645 domain[sizeof(domain) - 1] = '\0'; 646 if ((cp = strchr(domain, '.'))) 647 (void)strlcpy(domain, cp + 1, sizeof(domain)); 648 else 649 domain[0] = 0; 650 } else 651 domain[0] = 0; 652 } 653 cp = 0; 654 if (!numeric_addr) { 655 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 656 AF_INET); 657 if (hp) { 658 if ((cp = strchr(hp->h_name, '.')) && 659 !strcmp(cp + 1, domain)) 660 *cp = 0; 661 cp = hp->h_name; 662 } 663 } 664 if (cp) 665 strlcpy(line, cp, sizeof(line)); 666 else { 667 #define C(x) ((x) & 0xff) 668 in = ntohl(in); 669 snprintf(line, sizeof line, "%u.%u.%u.%u", 670 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 671 } 672 return (line); 673 } 674 675 static u_long 676 forgemask(a) 677 u_long a; 678 { 679 u_long m; 680 681 if (IN_CLASSA(a)) 682 m = IN_CLASSA_NET; 683 else if (IN_CLASSB(a)) 684 m = IN_CLASSB_NET; 685 else 686 m = IN_CLASSC_NET; 687 return (m); 688 } 689 690 static void 691 domask(dst, dlen, addr, mask) 692 char *dst; 693 size_t dlen; 694 u_long addr, mask; 695 { 696 int b, i; 697 698 if (!mask) { 699 *dst = '\0'; 700 return; 701 } 702 i = 0; 703 for (b = 0; b < 32; b++) 704 if (mask & (1 << b)) { 705 int bb; 706 707 i = b; 708 for (bb = b+1; bb < 32; bb++) 709 if (!(mask & (1 << bb))) { 710 i = -1; /* noncontig */ 711 break; 712 } 713 break; 714 } 715 if (i == -1) 716 (void)snprintf(dst, dlen, "&0x%lx", mask); 717 else 718 (void)snprintf(dst, dlen, "/%d", 32-i); 719 } 720 721 /* 722 * Return the name of the network whose address is given. 723 * The address is assumed to be that of a net or subnet, not a host. 724 */ 725 char * 726 netname(in, mask) 727 u_int32_t in, mask; 728 { 729 char *cp = 0; 730 static char line[MAXHOSTNAMELEN + 4]; 731 struct netent *np = 0; 732 u_int32_t net, omask; 733 u_int32_t i; 734 int subnetshift; 735 736 i = ntohl(in); 737 omask = mask = ntohl(mask); 738 if (!numeric_addr && i != INADDR_ANY) { 739 if (mask == INADDR_ANY) { 740 switch (mask = forgemask(i)) { 741 case IN_CLASSA_NET: 742 subnetshift = 8; 743 break; 744 case IN_CLASSB_NET: 745 subnetshift = 8; 746 break; 747 case IN_CLASSC_NET: 748 subnetshift = 4; 749 break; 750 default: 751 abort(); 752 } 753 /* 754 * If there are more bits than the standard mask 755 * would suggest, subnets must be in use. 756 * Guess at the subnet mask, assuming reasonable 757 * width subnet fields. 758 */ 759 while (i &~ mask) 760 mask = (long)mask >> subnetshift; 761 } 762 net = i & mask; 763 /* 764 * Note: shift the hosts bits out in octet units, since 765 * not all versions of getnetbyaddr() do this for us (e.g. 766 * the current `etc/networks' parser). 767 */ 768 while ((mask & 0xff) == 0) 769 mask >>= 8, net >>= 8; 770 np = getnetbyaddr(net, AF_INET); 771 if (np) 772 cp = np->n_name; 773 } 774 if (cp) 775 strlcpy(line, cp, sizeof(line)); 776 else if ((i & 0xffffff) == 0) 777 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 778 else if ((i & 0xffff) == 0) 779 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 780 , C(i >> 16)); 781 else if ((i & 0xff) == 0) 782 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 783 C(i >> 16), C(i >> 8)); 784 else 785 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 786 C(i >> 16), C(i >> 8), C(i)); 787 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 788 return (line); 789 } 790 791 #ifdef INET6 792 char * 793 netname6(sa6, mask) 794 struct sockaddr_in6 *sa6; 795 struct in6_addr *mask; 796 { 797 static char line[NI_MAXHOST]; 798 u_char *p, *q; 799 u_char *lim; 800 int masklen, final = 0, illegal = 0; 801 #ifdef NI_WITHSCOPEID 802 int flag = NI_WITHSCOPEID; 803 #else 804 int flag = 0; 805 #endif 806 int error; 807 struct sockaddr_in6 sin6; 808 809 sin6 = *sa6; 810 if (mask) { 811 masklen = 0; 812 lim = (u_char *)(mask + 1); 813 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 814 p < lim; 815 p++, q++) { 816 if (final && *p) { 817 illegal++; 818 *q = 0; 819 continue; 820 } 821 822 switch (*p & 0xff) { 823 case 0xff: 824 masklen += 8; 825 break; 826 case 0xfe: 827 masklen += 7; 828 final++; 829 break; 830 case 0xfc: 831 masklen += 6; 832 final++; 833 break; 834 case 0xf8: 835 masklen += 5; 836 final++; 837 break; 838 case 0xf0: 839 masklen += 4; 840 final++; 841 break; 842 case 0xe0: 843 masklen += 3; 844 final++; 845 break; 846 case 0xc0: 847 masklen += 2; 848 final++; 849 break; 850 case 0x80: 851 masklen += 1; 852 final++; 853 break; 854 case 0x00: 855 final++; 856 break; 857 default: 858 final++; 859 illegal++; 860 break; 861 } 862 863 if (!illegal) 864 *q &= *p; 865 else 866 *q = 0; 867 } 868 } else 869 masklen = 128; 870 871 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 872 return("default"); 873 874 if (numeric_addr) 875 flag |= NI_NUMERICHOST; 876 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 877 line, sizeof(line), NULL, 0, flag); 878 if (error) 879 strlcpy(line, "invalid", sizeof(line)); 880 881 if (numeric_addr) 882 snprintf(&line[strlen(line)], sizeof(line) - strlen(line), 883 "/%d", masklen); 884 885 return line; 886 } 887 888 char * 889 routename6(sa6) 890 struct sockaddr_in6 *sa6; 891 { 892 static char line[NI_MAXHOST]; 893 #ifdef NI_WITHSCOPEID 894 int flag = NI_WITHSCOPEID; 895 #else 896 int flag = 0; 897 #endif 898 /* use local variable for safety */ 899 struct sockaddr_in6 sa6_local; 900 int error; 901 902 memset(&sa6_local, 0, sizeof(sa6_local)); 903 sa6_local.sin6_family = AF_INET6; 904 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 905 sa6_local.sin6_addr = sa6->sin6_addr; 906 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 907 908 if (numeric_addr) 909 flag |= NI_NUMERICHOST; 910 911 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 912 line, sizeof(line), NULL, 0, flag); 913 if (error) 914 strlcpy(line, "invalid", sizeof(line)); 915 916 return line; 917 } 918 #endif /*INET6*/ 919 920 /* 921 * Print routing statistics 922 */ 923 void 924 rt_stats(off) 925 u_long off; 926 { 927 struct rtstat rtstat; 928 929 if (off == 0) { 930 printf("rtstat: symbol not in namelist\n"); 931 return; 932 } 933 kread(off, (char *)&rtstat, sizeof (rtstat)); 934 printf("routing:\n"); 935 printf("\t%llu bad routing redirect%s\n", 936 (unsigned long long)rtstat.rts_badredirect, 937 plural(rtstat.rts_badredirect)); 938 printf("\t%llu dynamically created route%s\n", 939 (unsigned long long)rtstat.rts_dynamic, 940 plural(rtstat.rts_dynamic)); 941 printf("\t%llu new gateway%s due to redirects\n", 942 (unsigned long long)rtstat.rts_newgateway, 943 plural(rtstat.rts_newgateway)); 944 printf("\t%llu destination%s found unreachable\n", 945 (unsigned long long)rtstat.rts_unreach, 946 plural(rtstat.rts_unreach)); 947 printf("\t%llu use%s of a wildcard route\n", 948 (unsigned long long)rtstat.rts_wildcard, 949 plural(rtstat.rts_wildcard)); 950 } 951 short ns_nullh[] = {0,0,0}; 952 short ns_bh[] = {-1,-1,-1}; 953 954 char * 955 ns_print(sa) 956 struct sockaddr *sa; 957 { 958 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 959 struct ns_addr work; 960 union { 961 union ns_net net_e; 962 u_long long_e; 963 } net; 964 u_short port; 965 static char mybuf[50], cport[10], chost[25]; 966 char *host = ""; 967 char *p; 968 u_char *q; 969 970 work = sns->sns_addr; 971 port = ntohs(work.x_port); 972 work.x_port = 0; 973 net.net_e = work.x_net; 974 if (ns_nullhost(work) && net.long_e == 0) { 975 if (port ) { 976 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 977 upHex(mybuf); 978 } else 979 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 980 return (mybuf); 981 } 982 983 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 984 host = "any"; 985 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 986 host = "*"; 987 } else { 988 q = work.x_host.c_host; 989 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 990 q[0], q[1], q[2], q[3], q[4], q[5]); 991 for (p = chost; *p == '0' && p < chost + 12; p++) 992 continue; 993 host = p; 994 } 995 if (port) 996 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 997 else 998 *cport = 0; 999 1000 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 1001 host, cport); 1002 upHex(mybuf); 1003 return (mybuf); 1004 } 1005 1006 char * 1007 ns_phost(sa) 1008 struct sockaddr *sa; 1009 { 1010 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1011 struct sockaddr_ns work; 1012 static union ns_net ns_zeronet; 1013 char *p; 1014 1015 work = *sns; 1016 work.sns_addr.x_port = 0; 1017 work.sns_addr.x_net = ns_zeronet; 1018 1019 p = ns_print((struct sockaddr *)&work); 1020 if (strncmp("0H.", p, 3) == 0) 1021 p += 3; 1022 return (p); 1023 } 1024 1025 void 1026 upHex(p0) 1027 char *p0; 1028 { 1029 char *p = p0; 1030 1031 for (; *p; p++) 1032 switch (*p) { 1033 case 'a': 1034 case 'b': 1035 case 'c': 1036 case 'd': 1037 case 'e': 1038 case 'f': 1039 *p += ('A' - 'a'); 1040 } 1041 } 1042
Indexes created Thu Oct 16 14:10:15 GMT 2025