route.c revision 1.61
1 /* $NetBSD: route.c,v 1.61 2003/07/12 13:39:23 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 1.61 2003/07/12 13:39:23 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_DYNAMIC, 'D' }, 95 { RTF_MODIFIED, 'M' }, 96 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 97 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */ 98 { RTF_CLONING, 'C' }, 99 { RTF_XRESOLVE, 'X' }, 100 { RTF_LLINFO, 'L' }, 101 { RTF_STATIC, 'S' }, 102 { RTF_BLACKHOLE,'B' }, 103 { RTF_CLONED, 'c' }, 104 { RTF_PROTO1, '1' }, 105 { RTF_PROTO2, '2' }, 106 { 0 } 107 }; 108 109 /* 110 * XXX we put all of the sockaddr types in here to force the alignment 111 * to be correct. 112 */ 113 static union sockaddr_union { 114 struct sockaddr u_sa; 115 struct sockaddr_in u_in; 116 struct sockaddr_un u_un; 117 struct sockaddr_iso u_iso; 118 struct sockaddr_at u_at; 119 struct sockaddr_dl u_dl; 120 struct sockaddr_ns u_ns; 121 u_short u_data[128]; 122 int u_dummy; /* force word-alignment */ 123 } pt_u; 124 125 int do_rtent = 0; 126 struct rtentry rtentry; 127 struct radix_node rnode; 128 struct radix_mask rmask; 129 130 int NewTree = 0; 131 132 static struct sockaddr *kgetsa __P((struct sockaddr *)); 133 static void p_tree __P((struct radix_node *)); 134 static void p_rtnode __P((void)); 135 static void ntreestuff __P((void)); 136 static void np_rtentry __P((struct rt_msghdr *)); 137 static void p_sockaddr __P((const struct sockaddr *, 138 const struct sockaddr *, int, int)); 139 static void p_flags __P((int)); 140 static void p_rtentry __P((struct rtentry *)); 141 static void ntreestuff __P((void)); 142 static u_long forgemask __P((u_long)); 143 static void domask __P((char *, size_t, u_long, u_long)); 144 145 /* 146 * Print routing tables. 147 */ 148 void 149 routepr(rtree) 150 u_long rtree; 151 { 152 struct radix_node_head *rnh, head; 153 struct radix_node_head *rt_tables[AF_MAX+1]; 154 int i; 155 156 printf("Routing tables\n"); 157 158 if (Aflag == 0 && NewTree) 159 ntreestuff(); 160 else { 161 if (rtree == 0) { 162 printf("rt_tables: symbol not in namelist\n"); 163 return; 164 } 165 166 kget(rtree, rt_tables); 167 for (i = 0; i <= AF_MAX; i++) { 168 if ((rnh = rt_tables[i]) == 0) 169 continue; 170 kget(rnh, head); 171 if (i == AF_UNSPEC) { 172 if (Aflag && af == 0) { 173 printf("Netmasks:\n"); 174 p_tree(head.rnh_treetop); 175 } 176 } else if (af == AF_UNSPEC || af == i) { 177 pr_family(i); 178 do_rtent = 1; 179 pr_rthdr(i); 180 p_tree(head.rnh_treetop); 181 } 182 } 183 } 184 } 185 186 /* 187 * Print address family header before a section of the routing table. 188 */ 189 void 190 pr_family(af) 191 int af; 192 { 193 char *afname; 194 195 switch (af) { 196 case AF_INET: 197 afname = "Internet"; 198 break; 199 #ifdef INET6 200 case AF_INET6: 201 afname = "Internet6"; 202 break; 203 #endif 204 case AF_NS: 205 afname = "XNS"; 206 break; 207 case AF_ISO: 208 afname = "ISO"; 209 break; 210 case AF_APPLETALK: 211 afname = "AppleTalk"; 212 break; 213 case AF_CCITT: 214 afname = "X.25"; 215 break; 216 default: 217 afname = NULL; 218 break; 219 } 220 if (afname) 221 printf("\n%s:\n", afname); 222 else 223 printf("\nProtocol Family %d:\n", af); 224 } 225 226 /* column widths; each followed by one space */ 227 #ifndef INET6 228 #define WID_DST(af) 18 /* width of destination column */ 229 #define WID_GW(af) 18 /* width of gateway column */ 230 #else 231 /* width of destination/gateway column */ 232 #if 1 233 /* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 */ 234 #define WID_DST(af) ((af) == AF_INET6 ? (numeric_addr ? 34 : 18) : 18) 235 #define WID_GW(af) ((af) == AF_INET6 ? (numeric_addr ? 30 : 18) : 18) 236 #else 237 /* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */ 238 #define WID_DST(af) ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18) 239 #define WID_GW(af) ((af) == AF_INET6 ? (numeric_addr ? 25 : 18) : 18) 240 #endif 241 #endif /* INET6 */ 242 243 /* 244 * Print header for routing table columns. 245 */ 246 void 247 pr_rthdr(af) 248 int af; 249 { 250 251 if (Aflag) 252 printf("%-8.8s ","Address"); 253 printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n", 254 WID_DST(af), WID_DST(af), "Destination", 255 WID_GW(af), WID_GW(af), "Gateway", 256 "Flags", "Refs", "Use", "Mtu", "Interface"); 257 } 258 259 static struct sockaddr * 260 kgetsa(dst) 261 struct sockaddr *dst; 262 { 263 264 kget(dst, pt_u.u_sa); 265 if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) 266 kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len); 267 return (&pt_u.u_sa); 268 } 269 270 static void 271 p_tree(rn) 272 struct radix_node *rn; 273 { 274 275 again: 276 kget(rn, rnode); 277 if (rnode.rn_b < 0) { 278 if (Aflag) 279 printf("%-8.8lx ", (u_long) rn); 280 if (rnode.rn_flags & RNF_ROOT) { 281 if (Aflag) 282 printf("(root node)%s", 283 rnode.rn_dupedkey ? " =>\n" : "\n"); 284 } else if (do_rtent) { 285 kget(rn, rtentry); 286 p_rtentry(&rtentry); 287 if (Aflag) 288 p_rtnode(); 289 } else { 290 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key), 291 NULL, 0, 44); 292 putchar('\n'); 293 } 294 if ((rn = rnode.rn_dupedkey) != NULL) 295 goto again; 296 } else { 297 if (Aflag && do_rtent) { 298 printf("%-8.8lx ", (u_long) rn); 299 p_rtnode(); 300 } 301 rn = rnode.rn_r; 302 p_tree(rnode.rn_l); 303 p_tree(rn); 304 } 305 } 306 307 static void 308 p_rtnode() 309 { 310 struct radix_mask *rm = rnode.rn_mklist; 311 char nbuf[20]; 312 313 if (rnode.rn_b < 0) { 314 if (rnode.rn_mask) { 315 printf("\t mask "); 316 p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask), 317 NULL, 0, -1); 318 } else if (rm == 0) 319 return; 320 } else { 321 (void)snprintf(nbuf, sizeof nbuf, "(%d)", rnode.rn_b); 322 printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l, 323 (u_long) rnode.rn_r); 324 } 325 while (rm) { 326 kget(rm, rmask); 327 (void)snprintf(nbuf, sizeof nbuf, " %d refs, ", rmask.rm_refs); 328 printf(" mk = %8.8lx {(%d),%s", (u_long) rm, 329 -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " "); 330 if (rmask.rm_flags & RNF_NORMAL) { 331 struct radix_node rnode_aux; 332 printf(" <normal>, "); 333 kget(rmask.rm_leaf, rnode_aux); 334 p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask), 335 NULL, 0, -1); 336 } else 337 p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 338 NULL, 0, -1); 339 putchar('}'); 340 if ((rm = rmask.rm_mklist) != NULL) 341 printf(" ->"); 342 } 343 putchar('\n'); 344 } 345 346 static void 347 ntreestuff() 348 { 349 size_t needed; 350 int mib[6]; 351 char *buf, *next, *lim; 352 struct rt_msghdr *rtm; 353 354 mib[0] = CTL_NET; 355 mib[1] = PF_ROUTE; 356 mib[2] = 0; 357 mib[3] = 0; 358 mib[4] = NET_RT_DUMP; 359 mib[5] = 0; 360 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 361 err(1, "route sysctl estimate"); 362 if ((buf = malloc(needed)) == 0) 363 errx(1, "out of space"); 364 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 365 err(1, "sysctl of routing table"); 366 lim = buf + needed; 367 for (next = buf; next < lim; next += rtm->rtm_msglen) { 368 rtm = (struct rt_msghdr *)next; 369 np_rtentry(rtm); 370 } 371 } 372 373 static void 374 np_rtentry(rtm) 375 struct rt_msghdr *rtm; 376 { 377 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 378 #ifdef notdef 379 static int masks_done, banner_printed; 380 #endif 381 static int old_af; 382 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 383 384 if (Lflag && (rtm->rtm_flags & RTF_LLINFO)) 385 return; 386 #ifdef notdef 387 /* for the moment, netmasks are skipped over */ 388 if (!banner_printed) { 389 printf("Netmasks:\n"); 390 banner_printed = 1; 391 } 392 if (masks_done == 0) { 393 if (rtm->rtm_addrs != RTA_DST ) { 394 masks_done = 1; 395 af = sa->sa_family; 396 } 397 } else 398 #endif 399 af = sa->sa_family; 400 if (af != old_af) { 401 pr_family(af); 402 old_af = af; 403 } 404 if (rtm->rtm_addrs == RTA_DST) 405 p_sockaddr(sa, NULL, 0, 36); 406 else { 407 p_sockaddr(sa, NULL, rtm->rtm_flags, 16); 408 #if 0 409 if (sa->sa_len == 0) 410 sa->sa_len = sizeof(long); 411 #endif 412 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 413 p_sockaddr(sa, NULL, 0, 18); 414 } 415 p_flags(rtm->rtm_flags & interesting); 416 putchar('\n'); 417 } 418 419 static void 420 p_sockaddr(sa, mask, flags, width) 421 const struct sockaddr *sa, *mask; 422 int flags, width; 423 { 424 char workbuf[128], *cplim; 425 char *cp = workbuf; 426 char *ep = workbuf + sizeof(workbuf); 427 int n; 428 429 switch(sa->sa_family) { 430 case AF_INET: 431 { 432 struct sockaddr_in *sin = (struct sockaddr_in *)sa; 433 434 if ((sin->sin_addr.s_addr == INADDR_ANY) && 435 (mask != NULL) && 436 (((struct sockaddr_in *)mask)->sin_addr.s_addr == 0)) 437 cp = "default"; 438 else if (flags & RTF_HOST) 439 cp = routename(sin->sin_addr.s_addr); 440 else if (mask) 441 cp = netname(sin->sin_addr.s_addr, 442 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 443 else 444 cp = netname(sin->sin_addr.s_addr, INADDR_ANY); 445 break; 446 } 447 448 #ifdef INET6 449 case AF_INET6: 450 { 451 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 452 #ifdef __KAME__ 453 struct in6_addr *in6 = &sa6->sin6_addr; 454 455 /* 456 * XXX: This is a special workaround for KAME kernels. 457 * sin6_scope_id field of SA should be set in the future. 458 */ 459 if (IN6_IS_ADDR_LINKLOCAL(in6) || 460 IN6_IS_ADDR_MC_LINKLOCAL(in6)) { 461 /* XXX: override is ok? */ 462 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]); 463 *(u_short *)&in6->s6_addr[2] = 0; 464 } 465 #endif 466 467 if (flags & RTF_HOST) 468 cp = routename6(sa6); 469 else if (mask) { 470 cp = netname6(sa6, 471 &((struct sockaddr_in6 *)mask)->sin6_addr); 472 } else 473 cp = netname6(sa6, NULL); 474 break; 475 } 476 #endif 477 478 #ifndef SMALL 479 case AF_APPLETALK: 480 case 0: 481 { 482 if (!(flags & RTF_HOST) && mask) 483 cp = atalk_print2(sa,mask,11); 484 else 485 cp = atalk_print(sa,11); 486 break; 487 } 488 case AF_NS: 489 cp = ns_print((struct sockaddr *)sa); 490 break; 491 #endif 492 493 case AF_LINK: 494 if (getnameinfo(sa, sa->sa_len, workbuf, sizeof(workbuf), 495 NULL, 0, NI_NUMERICHOST) != 0) 496 strlcpy(workbuf, "invalid", sizeof(workbuf)); 497 cp = workbuf; 498 break; 499 500 default: 501 { 502 u_char *s = (u_char *)sa->sa_data, *slim; 503 504 slim = sa->sa_len + (u_char *) sa; 505 cplim = cp + sizeof(workbuf) - 6; 506 n = snprintf(cp, ep - cp, "(%d)", sa->sa_family); 507 if (n >= ep - cp) 508 n = ep - cp - 1; 509 if (n > 0) 510 cp += n; 511 while (s < slim && cp < cplim) { 512 n = snprintf(cp, ep - cp, " %02x", *s++); 513 if (n >= ep - cp) 514 n = ep - cp - 1; 515 if (n > 0) 516 cp += n; 517 if (s < slim) { 518 n = snprintf(cp, ep - cp, "%02x", *s++); 519 if (n >= ep - cp) 520 n = ep - cp - 1; 521 if (n > 0) 522 cp += n; 523 } 524 } 525 cp = workbuf; 526 } 527 } 528 if (width < 0 ) 529 printf("%s ", cp); 530 else { 531 if (numeric_addr) 532 printf("%-*s ", width, cp); 533 else 534 printf("%-*.*s ", width, width, cp); 535 } 536 } 537 538 static void 539 p_flags(f) 540 int f; 541 { 542 char name[33], *flags; 543 struct bits *p = bits; 544 545 for (flags = name; p->b_mask && flags - name < sizeof(name); p++) 546 if (p->b_mask & f) 547 *flags++ = p->b_val; 548 *flags = '\0'; 549 printf("%-6.6s ", name); 550 } 551 552 static struct sockaddr *sockcopy __P((struct sockaddr *, 553 union sockaddr_union *)); 554 555 /* 556 * copy a sockaddr into an allocated region, allocate at least sockaddr 557 * bytes and zero unused 558 */ 559 static struct sockaddr * 560 sockcopy(sp, dp) 561 struct sockaddr *sp; 562 union sockaddr_union *dp; 563 { 564 int len; 565 566 if (sp == 0 || sp->sa_len == 0) 567 (void)memset(dp, 0, sizeof (*sp)); 568 else { 569 len = (sp->sa_len >= sizeof (*sp)) ? sp->sa_len : sizeof (*sp); 570 (void)memcpy(dp, sp, len); 571 } 572 return ((struct sockaddr *)dp); 573 } 574 575 static void 576 p_rtentry(rt) 577 struct rtentry *rt; 578 { 579 static struct ifnet ifnet, *lastif; 580 union sockaddr_union addr_un, mask_un; 581 struct sockaddr *addr, *mask; 582 int af; 583 584 if (Lflag && (rt->rt_flags & RTF_LLINFO)) 585 return; 586 587 memset(&addr_un, 0, sizeof(addr_un)); 588 memset(&mask_un, 0, sizeof(mask_un)); 589 addr = sockcopy(kgetsa(rt_key(rt)), &addr_un); 590 af = addr->sa_family; 591 if (rt_mask(rt)) 592 mask = sockcopy(kgetsa(rt_mask(rt)), &mask_un); 593 else 594 mask = sockcopy(NULL, &mask_un); 595 p_sockaddr(addr, mask, rt->rt_flags, WID_DST(af)); 596 p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW(af)); 597 p_flags(rt->rt_flags); 598 printf("%6d %8lu ", rt->rt_refcnt, rt->rt_use); 599 if (rt->rt_rmx.rmx_mtu) 600 printf("%6lu", rt->rt_rmx.rmx_mtu); 601 else 602 printf("%6s", "-"); 603 putchar((rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 604 if (rt->rt_ifp) { 605 if (rt->rt_ifp != lastif) { 606 kget(rt->rt_ifp, ifnet); 607 lastif = rt->rt_ifp; 608 } 609 printf(" %.16s%s", ifnet.if_xname, 610 rt->rt_nodes[0].rn_dupedkey ? " =>" : ""); 611 } 612 putchar('\n'); 613 if (vflag) { 614 printf("\texpire %10lu%c recvpipe %10ld%c " 615 "sendpipe %10ld%c\n", 616 rt->rt_rmx.rmx_expire, 617 (rt->rt_rmx.rmx_locks & RTV_EXPIRE) ? 'L' : ' ', 618 rt->rt_rmx.rmx_recvpipe, 619 (rt->rt_rmx.rmx_locks & RTV_RPIPE) ? 'L' : ' ', 620 rt->rt_rmx.rmx_sendpipe, 621 (rt->rt_rmx.rmx_locks & RTV_SPIPE) ? 'L' : ' '); 622 printf("\tssthresh %10lu%c rtt %10ld%c " 623 "rttvar %10ld%c\n", 624 rt->rt_rmx.rmx_ssthresh, 625 (rt->rt_rmx.rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 626 rt->rt_rmx.rmx_rtt, 627 (rt->rt_rmx.rmx_locks & RTV_RTT) ? 'L' : ' ', 628 rt->rt_rmx.rmx_rttvar, 629 (rt->rt_rmx.rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 630 printf("\thopcount %10lu%c\n", 631 rt->rt_rmx.rmx_hopcount, 632 (rt->rt_rmx.rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 633 } 634 } 635 636 char * 637 routename(in) 638 u_int32_t in; 639 { 640 char *cp; 641 static char line[MAXHOSTNAMELEN + 1]; 642 struct hostent *hp; 643 static char domain[MAXHOSTNAMELEN + 1]; 644 static int first = 1; 645 646 if (first) { 647 first = 0; 648 if (gethostname(domain, MAXHOSTNAMELEN) == 0) { 649 domain[sizeof(domain) - 1] = '\0'; 650 if ((cp = strchr(domain, '.'))) 651 (void)strlcpy(domain, cp + 1, sizeof(domain)); 652 else 653 domain[0] = 0; 654 } else 655 domain[0] = 0; 656 } 657 cp = 0; 658 if (!numeric_addr) { 659 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 660 AF_INET); 661 if (hp) { 662 if ((cp = strchr(hp->h_name, '.')) && 663 !strcmp(cp + 1, domain)) 664 *cp = 0; 665 cp = hp->h_name; 666 } 667 } 668 if (cp) 669 strlcpy(line, cp, sizeof(line)); 670 else { 671 #define C(x) ((x) & 0xff) 672 in = ntohl(in); 673 snprintf(line, sizeof line, "%u.%u.%u.%u", 674 C(in >> 24), C(in >> 16), C(in >> 8), C(in)); 675 } 676 return (line); 677 } 678 679 static u_long 680 forgemask(a) 681 u_long a; 682 { 683 u_long m; 684 685 if (IN_CLASSA(a)) 686 m = IN_CLASSA_NET; 687 else if (IN_CLASSB(a)) 688 m = IN_CLASSB_NET; 689 else 690 m = IN_CLASSC_NET; 691 return (m); 692 } 693 694 static void 695 domask(dst, dlen, addr, mask) 696 char *dst; 697 size_t dlen; 698 u_long addr, mask; 699 { 700 int b, i; 701 702 if (!mask || (forgemask(addr) == mask)) { 703 *dst = '\0'; 704 return; 705 } 706 i = 0; 707 for (b = 0; b < 32; b++) 708 if (mask & (1 << b)) { 709 int bb; 710 711 i = b; 712 for (bb = b+1; bb < 32; bb++) 713 if (!(mask & (1 << bb))) { 714 i = -1; /* noncontig */ 715 break; 716 } 717 break; 718 } 719 if (i == -1) 720 (void)snprintf(dst, dlen, "&0x%lx", mask); 721 else 722 (void)snprintf(dst, dlen, "/%d", 32-i); 723 } 724 725 /* 726 * Return the name of the network whose address is given. 727 * The address is assumed to be that of a net or subnet, not a host. 728 */ 729 char * 730 netname(in, mask) 731 u_int32_t in, mask; 732 { 733 char *cp = 0; 734 static char line[MAXHOSTNAMELEN + 4]; 735 struct netent *np = 0; 736 u_int32_t net, omask; 737 u_int32_t i; 738 int subnetshift; 739 740 i = ntohl(in); 741 omask = mask = ntohl(mask); 742 if (!numeric_addr && i != INADDR_ANY) { 743 if (mask == INADDR_ANY) { 744 switch (mask = forgemask(i)) { 745 case IN_CLASSA_NET: 746 subnetshift = 8; 747 break; 748 case IN_CLASSB_NET: 749 subnetshift = 8; 750 break; 751 case IN_CLASSC_NET: 752 subnetshift = 4; 753 break; 754 default: 755 abort(); 756 } 757 /* 758 * If there are more bits than the standard mask 759 * would suggest, subnets must be in use. 760 * Guess at the subnet mask, assuming reasonable 761 * width subnet fields. 762 */ 763 while (i &~ mask) 764 mask = (long)mask >> subnetshift; 765 } 766 net = i & mask; 767 /* 768 * Note: shift the hosts bits out in octet units, since 769 * not all versions of getnetbyaddr() do this for us (e.g. 770 * the current `etc/networks' parser). 771 */ 772 while ((mask & 0xff) == 0) 773 mask >>= 8, net >>= 8; 774 np = getnetbyaddr(net, AF_INET); 775 if (np) 776 cp = np->n_name; 777 } 778 if (cp) 779 strlcpy(line, cp, sizeof(line)); 780 else if ((i & 0xffffff) == 0) 781 (void)snprintf(line, sizeof line, "%u", C(i >> 24)); 782 else if ((i & 0xffff) == 0) 783 (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24) 784 , C(i >> 16)); 785 else if ((i & 0xff) == 0) 786 (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), 787 C(i >> 16), C(i >> 8)); 788 else 789 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), 790 C(i >> 16), C(i >> 8), C(i)); 791 domask(line + strlen(line), sizeof(line) - strlen(line), i, omask); 792 return (line); 793 } 794 795 #ifdef INET6 796 char * 797 netname6(sa6, mask) 798 struct sockaddr_in6 *sa6; 799 struct in6_addr *mask; 800 { 801 static char line[NI_MAXHOST]; 802 u_char *p, *q; 803 u_char *lim; 804 int masklen, final = 0, illegal = 0; 805 #ifdef NI_WITHSCOPEID 806 int flag = NI_WITHSCOPEID; 807 #else 808 int flag = 0; 809 #endif 810 int error; 811 struct sockaddr_in6 sin6; 812 813 sin6 = *sa6; 814 if (mask) { 815 masklen = 0; 816 lim = (u_char *)(mask + 1); 817 for (p = (u_char *)mask, q = (u_char *)&sin6.sin6_addr; 818 p < lim; 819 p++, q++) { 820 if (final && *p) { 821 illegal++; 822 *q = 0; 823 continue; 824 } 825 826 switch (*p & 0xff) { 827 case 0xff: 828 masklen += 8; 829 break; 830 case 0xfe: 831 masklen += 7; 832 final++; 833 break; 834 case 0xfc: 835 masklen += 6; 836 final++; 837 break; 838 case 0xf8: 839 masklen += 5; 840 final++; 841 break; 842 case 0xf0: 843 masklen += 4; 844 final++; 845 break; 846 case 0xe0: 847 masklen += 3; 848 final++; 849 break; 850 case 0xc0: 851 masklen += 2; 852 final++; 853 break; 854 case 0x80: 855 masklen += 1; 856 final++; 857 break; 858 case 0x00: 859 final++; 860 break; 861 default: 862 final++; 863 illegal++; 864 break; 865 } 866 867 if (!illegal) 868 *q &= *p; 869 else 870 *q = 0; 871 } 872 } else 873 masklen = 128; 874 875 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 876 return("default"); 877 878 if (numeric_addr) 879 flag |= NI_NUMERICHOST; 880 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 881 line, sizeof(line), NULL, 0, flag); 882 if (error) 883 strlcpy(line, "invalid", sizeof(line)); 884 885 if (numeric_addr) 886 snprintf(&line[strlen(line)], sizeof(line) - strlen(line), 887 "/%d", masklen); 888 889 return line; 890 } 891 892 char * 893 routename6(sa6) 894 struct sockaddr_in6 *sa6; 895 { 896 static char line[NI_MAXHOST]; 897 #ifdef NI_WITHSCOPEID 898 int flag = NI_WITHSCOPEID; 899 #else 900 int flag = 0; 901 #endif 902 /* use local variable for safety */ 903 struct sockaddr_in6 sa6_local; 904 int error; 905 906 memset(&sa6_local, 0, sizeof(sa6_local)); 907 sa6_local.sin6_family = AF_INET6; 908 sa6_local.sin6_len = sizeof(struct sockaddr_in6); 909 sa6_local.sin6_addr = sa6->sin6_addr; 910 sa6_local.sin6_scope_id = sa6->sin6_scope_id; 911 912 if (numeric_addr) 913 flag |= NI_NUMERICHOST; 914 915 error = getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, 916 line, sizeof(line), NULL, 0, flag); 917 if (error) 918 strlcpy(line, "invalid", sizeof(line)); 919 920 return line; 921 } 922 #endif /*INET6*/ 923 924 /* 925 * Print routing statistics 926 */ 927 void 928 rt_stats(off) 929 u_long off; 930 { 931 struct rtstat rtstat; 932 933 if (off == 0) { 934 printf("rtstat: symbol not in namelist\n"); 935 return; 936 } 937 kread(off, (char *)&rtstat, sizeof (rtstat)); 938 printf("routing:\n"); 939 printf("\t%llu bad routing redirect%s\n", 940 (unsigned long long)rtstat.rts_badredirect, 941 plural(rtstat.rts_badredirect)); 942 printf("\t%llu dynamically created route%s\n", 943 (unsigned long long)rtstat.rts_dynamic, 944 plural(rtstat.rts_dynamic)); 945 printf("\t%llu new gateway%s due to redirects\n", 946 (unsigned long long)rtstat.rts_newgateway, 947 plural(rtstat.rts_newgateway)); 948 printf("\t%llu destination%s found unreachable\n", 949 (unsigned long long)rtstat.rts_unreach, 950 plural(rtstat.rts_unreach)); 951 printf("\t%llu use%s of a wildcard route\n", 952 (unsigned long long)rtstat.rts_wildcard, 953 plural(rtstat.rts_wildcard)); 954 } 955 short ns_nullh[] = {0,0,0}; 956 short ns_bh[] = {-1,-1,-1}; 957 958 char * 959 ns_print(sa) 960 struct sockaddr *sa; 961 { 962 struct sockaddr_ns *sns = (struct sockaddr_ns*)sa; 963 struct ns_addr work; 964 union { 965 union ns_net net_e; 966 u_long long_e; 967 } net; 968 u_short port; 969 static char mybuf[50], cport[10], chost[25]; 970 char *host = ""; 971 char *p; 972 u_char *q; 973 974 work = sns->sns_addr; 975 port = ntohs(work.x_port); 976 work.x_port = 0; 977 net.net_e = work.x_net; 978 if (ns_nullhost(work) && net.long_e == 0) { 979 if (port ) { 980 (void)snprintf(mybuf, sizeof mybuf, "*.%xH", port); 981 upHex(mybuf); 982 } else 983 (void)snprintf(mybuf, sizeof mybuf, "*.*"); 984 return (mybuf); 985 } 986 987 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) { 988 host = "any"; 989 } else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) { 990 host = "*"; 991 } else { 992 q = work.x_host.c_host; 993 (void)snprintf(chost, sizeof chost, "%02x%02x%02x%02x%02x%02xH", 994 q[0], q[1], q[2], q[3], q[4], q[5]); 995 for (p = chost; *p == '0' && p < chost + 12; p++) 996 continue; 997 host = p; 998 } 999 if (port) 1000 (void)snprintf(cport, sizeof cport, ".%xH", htons(port)); 1001 else 1002 *cport = 0; 1003 1004 (void)snprintf(mybuf, sizeof mybuf, "%xH.%s%s", (int)ntohl(net.long_e), 1005 host, cport); 1006 upHex(mybuf); 1007 return (mybuf); 1008 } 1009 1010 char * 1011 ns_phost(sa) 1012 struct sockaddr *sa; 1013 { 1014 struct sockaddr_ns *sns = (struct sockaddr_ns *)sa; 1015 struct sockaddr_ns work; 1016 static union ns_net ns_zeronet; 1017 char *p; 1018 1019 work = *sns; 1020 work.sns_addr.x_port = 0; 1021 work.sns_addr.x_net = ns_zeronet; 1022 1023 p = ns_print((struct sockaddr *)&work); 1024 if (strncmp("0H.", p, 3) == 0) 1025 p += 3; 1026 return (p); 1027 } 1028 1029 void 1030 upHex(p0) 1031 char *p0; 1032 { 1033 char *p = p0; 1034 1035 for (; *p; p++) 1036 switch (*p) { 1037 case 'a': 1038 case 'b': 1039 case 'c': 1040 case 'd': 1041 case 'e': 1042 case 'f': 1043 *p += ('A' - 'a'); 1044 } 1045 } 1046
Indexes created Wed Sep 24 14:09:57 GMT 2025