route.c revision 1.66
1 /* $NetBSD: route.c,v 1.66 2005/08/04 19:41:28 rpaulo 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 1.66 2005/08/04 19:41:28 rpaulo 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 <kvm.h> 65 #include <netdb.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 71 #include "netstat.h" 72 73 #define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d))) 74 75 /* alignment constraint for routing socket */ 76 #define ROUNDUP(a) \ 77 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 78 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 79 80 /* 81 * Definitions for showing gateway flags. 82 */ 83 struct bits { 84 short b_mask; 85 char b_val; 86 } bits[] = { 87 { RTF_UP, 'U' }, 88 { RTF_GATEWAY, 'G' }, 89 { RTF_HOST, 'H' }, 90 { RTF_REJECT, 'R' }, 91 { RTF_DYNAMIC, 'D' }, 92 { RTF_MODIFIED, 'M' }, 93 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 94 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */ 95 { RTF_CLONING, 'C' }, 96 { RTF_XRESOLVE, 'X' }, 97 { RTF_LLINFO, 'L' }, 98 { RTF_STATIC, 'S' }, 99 { RTF_BLACKHOLE,'B' }, 100 { RTF_CLONED, 'c' }, 101 { RTF_PROTO1, '1' }, 102 { RTF_PROTO2, '2' }, 103 { 0 } 104 }; 105 106 /* 107 * XXX we put all of the sockaddr types in here to force the alignment 108 * to be correct. 109 */ 110 static union sockaddr_union { 111 struct sockaddr u_sa; 112 struct sockaddr_in u_in; 113 struct sockaddr_un u_un; 114 struct sockaddr_iso u_iso; 115 struct sockaddr_at u_at; 116 struct sockaddr_dl u_dl; 117 struct sockaddr_ns u_ns; 118 u_short u_data[128]; 119 int u_dummy; /* force word-alignment */ 120 } pt_u; 121 122 int do_rtent = 0; 123 struct rtentry rtentry; 124 struct radix_node rnode; 125 struct radix_mask rmask; 126 127 int NewTree = 0; 128 129 static struct sockaddr *kgetsa __P((struct sockaddr *)); 130 static void p_tree __P((struct radix_node *)); 131 static void p_rtnode __P((void)); 132 static void ntreestuff __P((void)); 133 static void np_rtentry __P((struct rt_msghdr *)); 134 static void p_sockaddr __P((const struct sockaddr *, 135 const struct sockaddr *, int, int)); 136 static void p_flags __P((int)); 137 static void p_rtentry __P((struct rtentry *)); 138 static void ntreestuff __P((void)); 139 static u_long forgemask __P((u_long)); 140 static void domask __P((char *, size_t, u_long, u_long)); 141 142 /* 143 * Print routing tables. 144 */ 145 void 146 routepr(rtree) 147 u_long rtree; 148 { 149 struct radix_node_head *rnh, head; 150 struct radix_node_head *rt_tables[AF_MAX+1]; 151 int i; 152 153 printf("Routing tables\n"); 154 155 if (Aflag == 0 && NewTree) 156 ntreestuff(); 157 else { 158 if (rtree == 0) { 159 printf("rt_tables: symbol not in namelist\n"); 160 return; 161 } 162 163 kget(rtree, rt_tables); 164 for (i = 0; i <= AF_MAX; i++) { 165 if ((rnh = rt_tables[i]) == 0) 166 continue; 167 kget(rnh, head); 168 if (i == AF_UNSPEC) { 169 if (Aflag && af == 0) { 170 printf("Netmasks:\n"); 171 p_tree(head.rnh_treetop); 172 } 173 } else if (af == AF_UNSPEC || af == i) { 174 pr_family(i); 175 do_rtent = 1; 176 pr_rthdr(i); 177 p_tree(head.rnh_treetop); 178 } 179 } 180 } 181 } 182 183 /* 184 * Print address family header before a section of the routing table. 185 */ 186 void 187 pr_family(af) 188 int af; 189 { 190 char *afname; 191 192 switch (af) { 193 case AF_INET: 194 afname = "Internet"; 195 break; 196 #ifdef INET6 197 case AF_INET6: 198 afname = "Internet6"; 199 break; 200 #endif 201 case AF_NS: 202 afname = "XNS"; 203 break; 204 case AF_ISO: 205 afname = "ISO"; 206 break; 207 case AF_APPLETALK: 208 afname = "AppleTalk"; 209 break; 210 case AF_CCITT: 211 afname = "X.25"; 212 break; 213 default: 214 afname = NULL; 215 break; 216 } 217 if (afname) 218 printf("\n%s:\n", afname); 219 else 220 printf("\nProtocol Family %d:\n", af); 221 } 222 223 /* column widths; each followed by one space */ 224 #ifndef INET6 225 #define WID_DST(af) 18 /* width of destination column */ 226 #define WID_GW(af) 18 /* width of gateway column */ 227 #else 228 /* width of destination/gateway column */ 229 #if 1 230 /* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 */ 231 #define WID_DST(af) ((af) == AF_INET6 ? (numeric_addr ? 34 : 18) : 18) 232 #define WID_GW(af) ((af) == AF_INET6 ? (numeric_addr ? 30 : 18) : 18) 233 #else 234 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 235 #define WID_DST(af) ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18) 236 #define WID_GW(af) ((af) == AF_INET6 ? (numeric_addr ? 25 : 18) : 18) 237 #endif 238 #endif /* INET6 */ 239 240 /* 241 * Print header for routing table columns. 242 */ 243 void 244 pr_rthdr(af) 245 int af; 246 { 247 248 if (Aflag) 249 printf("%-8.8s ","Address"); 250 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 251 WID_DST(af), WID_DST(af), "Destination", 252 WID_GW(af), WID_GW(af), "Gateway", 253 "Flags", "Refs", "Use", "Mtu", "Interface"); 254 } 255 256 static struct sockaddr * 257 kgetsa(dst) 258 struct sockaddr *dst; 259 { 260 261 kget(dst, pt_u.u_sa); 262 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 263 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 264 return (&pt_u.u_sa); 265 } 266 267 static void 268 p_tree(rn) 269 struct radix_node *rn; 270 { 271 272 again: 273 kget(rn, rnode); 274 if (rnode.rn_b < 0) { 275 if (Aflag) 276 printf("%-8.8lx ", (u_long) rn); 277 if (rnode.rn_flags & RNF_ROOT) { 278 if (Aflag) 279 printf("(root node)%s", 280 rnode.rn_dupedkey ? " =>\n" : "\n"); 281 } else if (do_rtent) { 282 kget(rn, rtentry); 283 p_rtentry(&rtentry); 284 if (Aflag) 285 p_rtnode(); 286 } else { 287 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 288 NULL, 0, 44); 289 putchar('\n'); 290 } 291 if ((rn = rnode.rn_dupedkey) != NULL) 292 goto again; 293 } else { 294 if (Aflag && do_rtent) { 295 printf("%-8.8lx ", (u_long) rn); 296 p_rtnode(); 297 } 298 rn = rnode.rn_r; 299 p_tree(rnode.rn_l); 300 p_tree(rn); 301 } 302 } 303 304 static void 305 p_rtnode() 306 { 307 struct radix_mask *rm = rnode.rn_mklist; 308 char nbuf[20]; 309 310 if (rnode.rn_b < 0) { 311 if (rnode.rn_mask) { 312 printf("\t mask "); 313 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 314 NULL, 0, -1); 315 } else if (rm == 0) 316 return; 317 } else { 318 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 319 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 320 (u_long) rnode.rn_r); 321 } 322 while (rm) { 323 kget(rm, rmask); 324 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 325 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 326 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 327 if (rmask.rm_flags & RNF_NORMAL) { 328 struct radix_node rnode_aux; 329 printf(" <normal>, "); 330 kget(rmask.rm_leaf, rnode_aux); 331 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 332 NULL, 0, -1); 333 } else 334 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 335 NULL, 0, -1); 336 putchar('}'); 337 if ((rm = rmask.rm_mklist) != NULL) 338 printf(" ->"); 339 } 340 putchar('\n'); 341 } 342 343 static void 344 ntreestuff() 345 { 346 size_t needed; 347 int mib[6]; 348 char *buf, *next, *lim; 349 struct rt_msghdr *rtm; 350 351 mib[0] = CTL_NET; 352 mib[1] = PF_ROUTE; 353 mib[2] = 0; 354 mib[3] = 0; 355 mib[4] = NET_RT_DUMP; 356 mib[5] = 0; 357 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 358 err(1, "route sysctl estimate"); 359 if ((buf = malloc(needed)) == 0) 360 errx(1, "out of space"); 361 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 362 err(1, "sysctl of routing table"); 363 lim = buf + needed; 364 for (next = buf; next < lim; next += rtm->rtm_msglen) { 365 rtm = (struct rt_msghdr *)next; 366 np_rtentry(rtm); 367 } 368 } 369 370 static void 371 np_rtentry(rtm) 372 struct rt_msghdr *rtm; 373 { 374 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 375 #ifdef notdef 376 static int masks_done, banner_printed; 377 #endif 378 static int old_af; 379 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 380 381 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 382 return; 383 #ifdef notdef 384 /* for the moment, netmasks are skipped over */ 385 if (!banner_printed) { 386 printf("Netmasks:\n"); 387 banner_printed = 1; 388 } 389 if (masks_done == 0) { 390 if (rtm->rtm_addrs != RTA_DST ) { 391 masks_done = 1; 392 af = sa->sa_family; 393 } 394 } else 395 #endif 396 af = sa->sa_family; 397 if (af != old_af) { 398 pr_family(af); 399 old_af = af; 400 } 401 if (rtm->rtm_addrs == RTA_DST) 402 p_sockaddr(sa, NULL, 0, 36); 403 else { 404 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 405 #if 0 406 if (sa->sa_len == 0) 407 sa->sa_len = sizeof(long); 408 #endif 409 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 410 p_sockaddr(sa, NULL, 0, 18); 411 } 412 p_flags(rtm->rtm_flags & interesting); 413 putchar('\n'); 414 } 415 416 static void 417 p_sockaddr(sa, mask, flags, width) 418 const struct sockaddr *sa, *mask; 419 int flags, width; 420 { 421 char workbuf[128], *cplim; 422 char *cp = workbuf; 423 char *ep = workbuf + sizeof(workbuf); 424 int n; 425 426 switch(sa->sa_family) { 427 case AF_INET: 428 { 429 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 430 431 if ((sin->sin_addr.s_addr == INADDR_ANY) && 432 (mask != NULL) && 433 (((struct sockaddr_in *)mask)->sin_addr.s_addr == 0)) 434 cp = "default"; 435 else if (flags & RTF_HOST) 436 cp = routename(sin->sin_addr.s_addr); 437 else if (mask) 438 cp = netname(sin->sin_addr.s_addr, 439 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 440 else 441 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 442 break; 443 } 444 445 #ifdef INET6 446 case AF_INET6: 447 { 448 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 449 #ifdef __KAME__ 450 struct in6_addr *in6 = &sa6->sin6_addr; 451 452 /* 453 * XXX: This is a special workaround for KAME kernels. 454 * sin6_scope_id field of SA should be set in the future. 455 */ 456 if (IN6_IS_ADDR_LINKLOCAL(in6) || 457 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 458 /* XXX: override is ok? */ 459 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 460 *(u_short *)&in6->s6_addr[2] = 0; 461 } 462 #endif 463 464 if (flags & RTF_HOST) 465 cp = routename6(sa6); 466 else if (mask) { 467 cp = netname6(sa6, 468 &((struct sockaddr_in6 *)mask)->sin6_addr); 469 } else 470 cp = netname6(sa6, NULL); 471 break; 472 } 473 #endif 474 475 #ifndef SMALL 476 case AF_APPLETALK: 477 case 0: 478 { 479 if (!(flags & RTF_HOST) && mask) 480 cp = atalk_print2(sa,mask,11); 481 else 482 cp = atalk_print(sa,11); 483 break; 484 } 485 case AF_NS: 486 cp = ns_print((struct sockaddr *)sa); 487 break; 488 #endif 489 490 case AF_LINK: 491 if (getnameinfo(sa, sa->sa_len, workbuf, sizeof(workbuf), 492 NULL, 0, NI_NUMERICHOST) != 0) 493 strlcpy(workbuf, "invalid", sizeof(workbuf)); 494 cp = workbuf; 495 break; 496 497 default: 498 { 499 u_char *s = (u_char *)sa->sa_data, *slim; 500 501 slim = sa->sa_len + (u_char *) sa; 502 cplim = cp + sizeof(workbuf) - 6; 503 n = snprintf(cp, ep - cp, "(%d)", sa->sa_family); 504 if (n >= ep - cp) 505 n = ep - cp - 1; 506 if (n > 0) 507 cp += n; 508 while (s < slim && cp < cplim) { 509 n = snprintf(cp, ep - cp, " %02x", *s++); 510 if (n >= ep - cp) 511 n = ep - cp - 1; 512 if (n > 0) 513 cp += n; 514 if (s < slim) { 515 n = snprintf(cp, ep - cp, "%02x", *s++); 516 if (n >= ep - cp) 517 n = ep - cp - 1; 518 if (n > 0) 519 cp += n; 520 } 521 } 522 cp = workbuf; 523 } 524 } 525 if (width < 0 ) 526 printf("%s ", cp); 527 else { 528 if (numeric_addr) 529 printf("%-*s ", width, cp); 530 else 531 printf("%-*.*s ", width, width, cp); 532 } 533 } 534 535 static void 536 p_flags(f) 537 int f; 538 { 539 char name[33], *flags; 540 struct bits *p = bits; 541 542 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 543 if (p->b_mask & f) 544 *flags++ = p->b_val; 545 *flags = '\0'; 546 printf("%-6.6s ", name); 547 } 548 549 static struct sockaddr *sockcopy __P((struct sockaddr *, 550 union sockaddr_union *)); 551 552 /* 553 * copy a sockaddr into an allocated region, allocate at least sockaddr 554 * bytes and zero unused 555 */ 556 static struct sockaddr * 557 sockcopy(sp, dp) 558 struct sockaddr *sp; 559 union sockaddr_union *dp; 560 { 561 int len; 562 563 if (sp == 0 || sp->sa_len == 0) 564 (void)memset(dp, 0, sizeof (*sp)); 565 else { 566 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 567 (void)memcpy(dp, sp, len); 568 } 569 return ((struct sockaddr *)dp); 570 } 571 572 static void 573 p_rtentry(rt) 574 struct rtentry *rt; 575 { 576 static struct ifnet ifnet, *lastif; 577 union sockaddr_union addr_un, mask_un; 578 struct sockaddr *addr, *mask; 579 int af; 580 581 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 582 return; 583 584 memset(&addr_un, 0, sizeof(addr_un)); 585 memset(&mask_un, 0, sizeof(mask_un)); 586 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 587 af = addr->sa_family; 588 if (rt_mask(rt)) 589 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 590 else 591 mask = sockcopy(NULL, &mask_un); 592 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 593 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 594 p_flags(rt->rt_flags); 595 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 596 if (rt->rt_rmx.rmx_mtu) 597 printf("%6lu", rt->rt_rmx.rmx_mtu); 598 else 599 printf("%6s", "-"); 600 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 601 if (rt->rt_ifp) { 602 if (rt->rt_ifp != lastif) { 603 kget(rt->rt_ifp, ifnet); 604 lastif = rt->rt_ifp; 605 } 606 printf(" %.16s%s", ifnet.if_xname, 607 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 608 } 609 putchar('\n'); 610 if (vflag) { 611 printf("\texpire %10lu%c recvpipe %10ld%c " 612 "sendpipe %10ld%c\n", 613 rt->rt_rmx.rmx_expire, 614 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 615 rt->rt_rmx.rmx_recvpipe, 616 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 617 rt->rt_rmx.rmx_sendpipe, 618 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 619 printf("\tssthresh %10lu%c rtt %10ld%c " 620 "rttvar %10ld%c\n", 621 rt->rt_rmx.rmx_ssthresh, 622 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 623 rt->rt_rmx.rmx_rtt, 624 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 625 rt->rt_rmx.rmx_rttvar, 626 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 627 printf("\thopcount %10lu%c\n", 628 rt->rt_rmx.rmx_hopcount, 629 (rt->rt_rmx.rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 630 } 631 } 632 633 char * 634 routename(in) 635 u_int32_t in; 636 { 637 char *cp; 638 static char line[MAXHOSTNAMELEN + 1]; 639 struct hostent *hp; 640 static char domain[MAXHOSTNAMELEN + 1]; 641 static int first = 1; 642 643 if (first) { 644 first = 0; 645 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 646 domain[sizeof(domain) - 1] = '\0'; 647 if ((cp = strchr(domain, '.'))) 648 (void)strlcpy(domain, cp + 1, sizeof(domain)); 649 else 650 domain[0] = 0; 651 } else 652 domain[0] = 0; 653 } 654 cp = 0; 655 if (!numeric_addr) { 656 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 657 AF_INET); 658 if (hp) { 659 if ((cp = strchr(hp->h_name, '.')) && 660 !strcmp(cp + 1, domain)) 661 *cp = 0; 662 cp = hp->h_name; 663 } 664 } 665 if (cp) 666 strlcpy(line, cp, sizeof(line)); 667 else { 668 #define C(x) ((x) & 0xff) 669 in = ntohl(in); 670 snprintf(line, sizeof line, "%u.%u.%u.%u", 671 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 672 } 673 return (line); 674 } 675 676 static u_long 677 forgemask(a) 678 u_long a; 679 { 680 u_long m; 681 682 if (IN_CLASSA(a)) 683 m = IN_CLASSA_NET; 684 else if (IN_CLASSB(a)) 685 m = IN_CLASSB_NET; 686 else 687 m = IN_CLASSC_NET; 688 return (m); 689 } 690 691 static void 692 domask(dst, dlen, addr, mask) 693 char *dst; 694 size_t dlen; 695 u_long addr, mask; 696 { 697 int b, i; 698 699 if (!mask) { 700 *dst = '\0'; 701 return; 702 } 703 i = 0; 704 for (b = 0; b < 32; b++) 705 if (mask & (1 << b)) { 706 int bb; 707 708 i = b; 709 for (bb = b+1; bb < 32; bb++) 710 if (!(mask & (1 << bb))) { 711 i = -1; /* noncontig */ 712 break; 713 } 714 break; 715 } 716 if (i == -1) 717 (void)snprintf(dst, dlen, "&0x%lx", mask); 718 else 719 (void)snprintf(dst, dlen, "/%d", 32-i); 720 } 721 722 /* 723 * Return the name of the network whose address is given. 724 * The address is assumed to be that of a net or subnet, not a host. 725 */ 726 char * 727 netname(in, mask) 728 u_int32_t in, mask; 729 { 730 char *cp = 0; 731 static char line[MAXHOSTNAMELEN + 4]; 732 struct netent *np = 0; 733 u_int32_t net, omask; 734 u_int32_t i; 735 int subnetshift; 736 737 i = ntohl(in); 738 omask = mask = ntohl(mask); 739 if (!numeric_addr && i != INADDR_ANY) { 740 if (mask == INADDR_ANY) { 741 switch (mask = forgemask(i)) { 742 case IN_CLASSA_NET: 743 subnetshift = 8; 744 break; 745 case IN_CLASSB_NET: 746 subnetshift = 8; 747 break; 748 case IN_CLASSC_NET: 749 subnetshift = 4; 750 break; 751 default: 752 abort(); 753 } 754 /* 755 * If there are more bits than the standard mask 756 * would suggest, subnets must be in use. 757 * Guess at the subnet mask, assuming reasonable 758 * width subnet fields. 759 */ 760 while (i &~ mask) 761 mask = (long)mask >> subnetshift; 762 } 763 net = i & mask; 764 /* 765 * Note: shift the hosts bits out in octet units, since 766 * not all versions of getnetbyaddr() do this for us (e.g. 767 * the current `etc/networks' parser). 768 */ 769 while ((mask & 0xff) == 0) 770 mask >>= 8, net >>= 8; 771 np = getnetbyaddr(net, AF_INET); 772 if (np) 773 cp = np->n_name; 774 } 775 if (cp) 776 strlcpy(line, cp, sizeof(line)); 777 else if ((i & 0xffffff) == 0) 778 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 779 else if ((i & 0xffff) == 0) 780 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 781 , C(i >> 16)); 782 else if ((i & 0xff) == 0) 783 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 784 C(i >> 16), C(i >> 8)); 785 else 786 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 787 C(i >> 16), C(i >> 8), C(i)); 788 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 789 return (line); 790 } 791 792 #ifdef INET6 793 char * 794 netname6(sa6, mask) 795 struct sockaddr_in6 *sa6; 796 struct in6_addr *mask; 797 { 798 static char line[NI_MAXHOST]; 799 u_char *p, *q; 800 u_char *lim; 801 int masklen, final = 0, illegal = 0; 802 int flag = 0; 803 int error; 804 struct sockaddr_in6 sin6; 805 806 sin6 = *sa6; 807 if (mask) { 808 masklen = 0; 809 lim = (u_char *)(mask + 1); 810 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 811 p < lim; 812 p++, q++) { 813 if (final && *p) { 814 illegal++; 815 *q = 0; 816 continue; 817 } 818 819 switch (*p & 0xff) { 820 case 0xff: 821 masklen += 8; 822 break; 823 case 0xfe: 824 masklen += 7; 825 final++; 826 break; 827 case 0xfc: 828 masklen += 6; 829 final++; 830 break; 831 case 0xf8: 832 masklen += 5; 833 final++; 834 break; 835 case 0xf0: 836 masklen += 4; 837 final++; 838 break; 839 case 0xe0: 840 masklen += 3; 841 final++; 842 break; 843 case 0xc0: 844 masklen += 2; 845 final++; 846 break; 847 case 0x80: 848 masklen += 1; 849 final++; 850 break; 851 case 0x00: 852 final++; 853 break; 854 default: 855 final++; 856 illegal++; 857 break; 858 } 859 860 if (!illegal) 861 *q &= *p; 862 else 863 *q = 0; 864 } 865 } else 866 masklen = 128; 867 868 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 869 return("default"); 870 871 if (numeric_addr) 872 flag |= NI_NUMERICHOST; 873 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 874 line, sizeof(line), NULL, 0, flag); 875 if (error) 876 strlcpy(line, "invalid", sizeof(line)); 877 878 if (numeric_addr) 879 snprintf(&line[strlen(line)], sizeof(line) - strlen(line), 880 "/%d", masklen); 881 882 return line; 883 } 884 885 char * 886 routename6(sa6) 887 struct sockaddr_in6 *sa6; 888 { 889 static char line[NI_MAXHOST]; 890 int flag = 0; 891 /* use local variable for safety */ 892 struct sockaddr_in6 sa6_local; 893 int error; 894 895 memset(&sa6_local, 0, sizeof(sa6_local)); 896 sa6_local.sin6_family = AF_INET6; 897 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 898 sa6_local.sin6_addr = sa6->sin6_addr; 899 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 900 901 if (numeric_addr) 902 flag |= NI_NUMERICHOST; 903 904 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 905 line, sizeof(line), NULL, 0, flag); 906 if (error) 907 strlcpy(line, "invalid", sizeof(line)); 908 909 return line; 910 } 911 #endif /*INET6*/ 912 913 /* 914 * Print routing statistics 915 */ 916 void 917 rt_stats(off) 918 u_long off; 919 { 920 struct rtstat rtstat; 921 922 if (off == 0) { 923 printf("rtstat: symbol not in namelist\n"); 924 return; 925 } 926 kread(off, (char *)&rtstat, sizeof (rtstat)); 927 printf("routing:\n"); 928 printf("\t%llu bad routing redirect%s\n", 929 (unsigned long long)rtstat.rts_badredirect, 930 plural(rtstat.rts_badredirect)); 931 printf("\t%llu dynamically created route%s\n", 932 (unsigned long long)rtstat.rts_dynamic, 933 plural(rtstat.rts_dynamic)); 934 printf("\t%llu new gateway%s due to redirects\n", 935 (unsigned long long)rtstat.rts_newgateway, 936 plural(rtstat.rts_newgateway)); 937 printf("\t%llu destination%s found unreachable\n", 938 (unsigned long long)rtstat.rts_unreach, 939 plural(rtstat.rts_unreach)); 940 printf("\t%llu use%s of a wildcard route\n", 941 (unsigned long long)rtstat.rts_wildcard, 942 plural(rtstat.rts_wildcard)); 943 } 944 short ns_nullh[] = {0,0,0}; 945 short ns_bh[] = {-1,-1,-1}; 946 947 char * 948 ns_print(sa) 949 struct sockaddr *sa; 950 { 951 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 952 struct ns_addr work; 953 union { 954 union ns_net net_e; 955 u_long long_e; 956 } net; 957 u_short port; 958 static char mybuf[50], cport[10], chost[25]; 959 char *host = ""; 960 char *p; 961 u_char *q; 962 963 work = sns->sns_addr; 964 port = ntohs(work.x_port); 965 work.x_port = 0; 966 net.net_e = work.x_net; 967 if (ns_nullhost(work) && net.long_e == 0) { 968 if (port ) { 969 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 970 upHex(mybuf); 971 } else 972 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 973 return (mybuf); 974 } 975 976 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 977 host = "any"; 978 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 979 host = "*"; 980 } else { 981 q = work.x_host.c_host; 982 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 983 q[0], q[1], q[2], q[3], q[4], q[5]); 984 for (p = chost; *p == '0' && p < chost + 12; p++) 985 continue; 986 host = p; 987 } 988 if (port) 989 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 990 else 991 *cport = 0; 992 993 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 994 host, cport); 995 upHex(mybuf); 996 return (mybuf); 997 } 998 999 char * 1000 ns_phost(sa) 1001 struct sockaddr *sa; 1002 { 1003 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1004 struct sockaddr_ns work; 1005 static union ns_net ns_zeronet; 1006 char *p; 1007 1008 work = *sns; 1009 work.sns_addr.x_port = 0; 1010 work.sns_addr.x_net = ns_zeronet; 1011 1012 p = ns_print((struct sockaddr *)&work); 1013 if (strncmp("0H.", p, 3) == 0) 1014 p += 3; 1015 return (p); 1016 } 1017 1018 void 1019 upHex(p0) 1020 char *p0; 1021 { 1022 char *p = p0; 1023 1024 for (; *p; p++) 1025 switch (*p) { 1026 case 'a': 1027 case 'b': 1028 case 'c': 1029 case 'd': 1030 case 'e': 1031 case 'f': 1032 *p += ('A' - 'a'); 1033 } 1034 } 1035
Indexes created Wed Sep 24 14:09:57 GMT 2025