1 /* $OpenBSD: show.c,v 1.120 2022/06/19 13:59:22 claudio Exp $ */ 2 /* $NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/socket.h> 34 #include <sys/sysctl.h> 35 36 #include <net/if.h> 37 #include <net/if_dl.h> 38 #include <net/if_types.h> 39 #include <net/route.h> 40 #include <net/rtable.h> 41 #include <netinet/in.h> 42 #include <netinet/if_ether.h> 43 #include <netmpls/mpls.h> 44 #include <arpa/inet.h> 45 46 #include <err.h> 47 #include <errno.h> 48 #include <netdb.h> 49 #include <stdio.h> 50 #include <stddef.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <limits.h> 55 56 #include "show.h" 57 58 char *any_ntoa(const struct sockaddr *); 59 char *link_print(struct sockaddr *); 60 char *label_print(struct sockaddr *); 61 62 #define ROUNDUP(a) \ 63 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 64 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 65 66 /* 67 * Definitions for showing gateway flags. 68 */ 69 struct bits { 70 int b_mask; 71 char b_val; 72 }; 73 static const struct bits bits[] = { 74 { RTF_UP, 'U' }, 75 { RTF_GATEWAY, 'G' }, 76 { RTF_HOST, 'H' }, 77 { RTF_REJECT, 'R' }, 78 { RTF_DYNAMIC, 'D' }, 79 { RTF_MODIFIED, 'M' }, 80 { RTF_CLONING, 'C' }, 81 { RTF_MULTICAST,'m' }, 82 { RTF_LLINFO, 'L' }, 83 { RTF_STATIC, 'S' }, 84 { RTF_BLACKHOLE,'B' }, 85 { RTF_PROTO3, '3' }, 86 { RTF_PROTO2, '2' }, 87 { RTF_PROTO1, '1' }, 88 { RTF_CLONED, 'c' }, 89 { RTF_CACHED, 'h' }, 90 { RTF_MPATH, 'P' }, 91 { RTF_MPLS, 'T' }, 92 { RTF_LOCAL, 'l' }, 93 { RTF_BFD, 'F' }, 94 { RTF_BROADCAST,'b' }, 95 { RTF_CONNECTED,'n' }, 96 { 0 } 97 }; 98 99 int WID_DST(int); 100 void pr_rthdr(int); 101 void p_rtentry(struct rt_msghdr *); 102 void pr_family(int); 103 void p_sockaddr_mpls(struct sockaddr *, struct sockaddr *, int, int); 104 void p_flags(int, char *); 105 char *routename4(in_addr_t); 106 char *routename6(struct sockaddr_in6 *); 107 char *netname4(in_addr_t, struct sockaddr_in *); 108 char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *); 109 110 size_t 111 get_sysctl(const int *mib, u_int mcnt, char **buf) 112 { 113 size_t needed; 114 115 while (1) { 116 if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1) 117 err(1, "sysctl-estimate"); 118 if (needed == 0) 119 break; 120 if ((*buf = realloc(*buf, needed)) == NULL) 121 err(1, NULL); 122 if (sysctl(mib, mcnt, *buf, &needed, NULL, 0) == -1) { 123 if (errno == ENOMEM) 124 continue; 125 err(1, "sysctl"); 126 } 127 break; 128 } 129 130 return needed; 131 } 132 133 /* 134 * Print preferred source address 135 */ 136 void 137 printsource(int af, u_int tableid) 138 { 139 struct sockaddr *sa; 140 char *buf = NULL, *next, *lim = NULL; 141 size_t needed; 142 int mib[7], mcnt, size; 143 144 mib[0] = CTL_NET; 145 mib[1] = PF_ROUTE; 146 mib[2] = 0; 147 mib[3] = af; 148 mib[4] = NET_RT_SOURCE; 149 mib[5] = tableid; 150 mcnt = 6; 151 152 needed = get_sysctl(mib, mcnt, &buf); 153 lim = buf + needed; 154 155 if (pledge("stdio", NULL) == -1) 156 err(1, "pledge"); 157 158 printf("Preferred source address set for rdomain %d\n", tableid); 159 160 if (buf) { 161 for (next = buf; next < lim; next += size) { 162 sa = (struct sockaddr *)next; 163 switch (sa->sa_family) { 164 case AF_INET: 165 size = sizeof(struct sockaddr_in); 166 printf("IPv4: "); 167 break; 168 case AF_INET6: 169 size = sizeof(struct sockaddr_in6); 170 printf("IPv6: "); 171 break; 172 } 173 p_sockaddr(sa, NULL, RTF_HOST, WID_DST(sa->sa_family)); 174 printf("\n"); 175 } 176 } 177 free(buf); 178 179 exit(0); 180 } 181 /* 182 * Print routing tables. 183 */ 184 void 185 p_rttables(int af, u_int tableid, char prio) 186 { 187 struct rt_msghdr *rtm; 188 char *buf = NULL, *next, *lim = NULL; 189 size_t needed; 190 int mib[7], mcnt; 191 192 mib[0] = CTL_NET; 193 mib[1] = PF_ROUTE; 194 mib[2] = 0; 195 mib[3] = af; 196 mib[4] = NET_RT_DUMP; 197 mib[5] = prio; 198 mib[6] = tableid; 199 mcnt = 7; 200 201 needed = get_sysctl(mib, mcnt, &buf); 202 lim = buf + needed; 203 204 if (pledge("stdio dns", NULL) == -1) 205 err(1, "pledge"); 206 207 printf("Routing tables\n"); 208 209 if (buf) { 210 for (next = buf; next < lim; next += rtm->rtm_msglen) { 211 rtm = (struct rt_msghdr *)next; 212 if (rtm->rtm_version != RTM_VERSION) 213 continue; 214 p_rtentry(rtm); 215 } 216 } 217 free(buf); 218 } 219 220 /* 221 * column widths; each followed by one space 222 * width of destination/gateway column 223 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 224 */ 225 #define WID_GW(af) ((af) == AF_INET6 ? 30 : 18) 226 227 int 228 WID_DST(int af) 229 { 230 231 switch (af) { 232 case AF_MPLS: 233 return 9; 234 case AF_INET6: 235 return 34; 236 default: 237 return 18; 238 } 239 } 240 241 /* 242 * Print header for routing table columns. 243 */ 244 void 245 pr_rthdr(int af) 246 { 247 switch (af) { 248 case PF_KEY: 249 printf("%-18s %-5s %-18s %-5s %-5s %-22s\n", 250 "Source", "Port", "Destination", 251 "Port", "Proto", "SA(Address/Proto/Type/Direction)"); 252 break; 253 case PF_MPLS: 254 printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s %4.4s %s\n", 255 "In label", "Out label", "Op", "Gateway", 256 "Flags", "Refs", "Use", "Mtu", "Prio", "Interface"); 257 break; 258 default: 259 printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s %4.4s %s", 260 WID_DST(af), WID_DST(af), "Destination", 261 WID_GW(af), WID_GW(af), "Gateway", 262 "Flags", "Refs", "Use", "Mtu", "Prio", "Iface"); 263 if (verbose) 264 printf(" %s", "Label"); 265 putchar('\n'); 266 break; 267 } 268 } 269 270 void 271 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) 272 { 273 int i; 274 275 for (i = 0; i < RTAX_MAX; i++) { 276 if (addrs & (1 << i)) { 277 rti_info[i] = sa; 278 sa = (struct sockaddr *)((char *)(sa) + 279 ROUNDUP(sa->sa_len)); 280 } else 281 rti_info[i] = NULL; 282 } 283 } 284 285 /* 286 * Print a routing table entry. 287 */ 288 void 289 p_rtentry(struct rt_msghdr *rtm) 290 { 291 static int old_af = -1; 292 struct sockaddr *sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen); 293 struct sockaddr *mask, *rti_info[RTAX_MAX]; 294 char ifbuf[IF_NAMESIZE]; 295 char *label; 296 297 if (sa->sa_family == AF_KEY) 298 return; 299 300 get_rtaddrs(rtm->rtm_addrs, sa, rti_info); 301 302 if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) { 303 return; 304 } 305 306 if (strlen(so_label.rtlabel.sr_label)) { 307 if (!rti_info[RTAX_LABEL]) 308 return; 309 label = ((struct sockaddr_rtlabel *)rti_info[RTAX_LABEL])-> 310 sr_label; 311 if (strcmp(label, so_label.rtlabel.sr_label)) 312 return; 313 } 314 315 if (old_af != sa->sa_family) { 316 old_af = sa->sa_family; 317 pr_family(sa->sa_family); 318 pr_rthdr(sa->sa_family); 319 } 320 321 mask = rti_info[RTAX_NETMASK]; 322 if ((sa = rti_info[RTAX_DST]) == NULL) 323 return; 324 325 p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family)); 326 p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls, 327 WID_DST(sa->sa_family)); 328 329 p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST, 330 WID_GW(sa->sa_family)); 331 332 p_flags(rtm->rtm_flags, "%-6.6s "); 333 printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt, 334 rtm->rtm_rmx.rmx_pksent); 335 if (rtm->rtm_rmx.rmx_mtu) 336 printf("%5u ", rtm->rtm_rmx.rmx_mtu); 337 else 338 printf("%5s ", "-"); 339 putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 340 printf(" %2d %-5.16s", rtm->rtm_priority, 341 if_indextoname(rtm->rtm_index, ifbuf)); 342 if (verbose && rti_info[RTAX_LABEL]) 343 printf(" %s", routename(rti_info[RTAX_LABEL])); 344 putchar('\n'); 345 } 346 347 /* 348 * Print address family header before a section of the routing table. 349 */ 350 void 351 pr_family(int af) 352 { 353 char *afname; 354 355 switch (af) { 356 case AF_INET: 357 afname = "Internet"; 358 break; 359 case AF_INET6: 360 afname = "Internet6"; 361 break; 362 case PF_KEY: 363 afname = "Encap"; 364 break; 365 case AF_MPLS: 366 afname = "MPLS"; 367 break; 368 default: 369 afname = NULL; 370 break; 371 } 372 if (afname) 373 printf("\n%s:\n", afname); 374 else 375 printf("\nProtocol Family %d:\n", af); 376 } 377 378 void 379 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width) 380 { 381 char *cp; 382 383 switch (sa->sa_family) { 384 case AF_INET6: 385 { 386 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 387 #ifdef __KAME__ 388 struct in6_addr *in6 = &sa6->sin6_addr; 389 390 /* 391 * XXX: This is a special workaround for KAME kernels. 392 * sin6_scope_id field of SA should be set in the future. 393 */ 394 if ((IN6_IS_ADDR_LINKLOCAL(in6) || 395 IN6_IS_ADDR_MC_LINKLOCAL(in6) || 396 IN6_IS_ADDR_MC_INTFACELOCAL(in6)) && 397 sa6->sin6_scope_id == 0) { 398 /* XXX: override is ok? */ 399 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *) 400 &in6->s6_addr[2]); 401 *(u_short *)&in6->s6_addr[2] = 0; 402 } 403 #endif 404 if (flags & RTF_HOST) 405 cp = routename((struct sockaddr *)sa6); 406 else 407 cp = netname((struct sockaddr *)sa6, mask); 408 break; 409 } 410 case AF_MPLS: 411 return; 412 default: 413 if ((flags & RTF_HOST) || mask == NULL) 414 cp = routename(sa); 415 else 416 cp = netname(sa, mask); 417 break; 418 } 419 if (width < 0) 420 printf("%s", cp); 421 else { 422 if (nflag) 423 printf("%-*s ", width, cp); 424 else 425 printf("%-*.*s ", width, width, cp); 426 } 427 } 428 429 static char line[HOST_NAME_MAX+1]; 430 static char domain[HOST_NAME_MAX+1]; 431 432 void 433 p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width) 434 { 435 if (in->sa_family != AF_MPLS) 436 return; 437 438 if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) { 439 printf("%-*s ", width, label_print(in)); 440 printf("%-*s ", width, label_print(NULL)); 441 } else { 442 printf("%-*s ", width, label_print(in)); 443 printf("%-*s ", width, label_print(out)); 444 } 445 446 printf("%-6s ", mpls_op(flags)); 447 } 448 449 void 450 p_flags(int f, char *format) 451 { 452 char name[33], *flags; 453 const struct bits *p = bits; 454 455 for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++) 456 if (p->b_mask & f) 457 *flags++ = p->b_val; 458 *flags = '\0'; 459 printf(format, name); 460 } 461 462 char * 463 routename(struct sockaddr *sa) 464 { 465 char *cp = NULL; 466 static int first = 1; 467 468 if (first) { 469 first = 0; 470 if (gethostname(domain, sizeof(domain)) == 0 && 471 (cp = strchr(domain, '.'))) 472 (void)strlcpy(domain, cp + 1, sizeof(domain)); 473 else 474 domain[0] = '\0'; 475 cp = NULL; 476 } 477 478 if (sa->sa_len == 0) { 479 (void)strlcpy(line, "default", sizeof(line)); 480 return (line); 481 } 482 483 switch (sa->sa_family) { 484 case AF_INET: 485 return 486 (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr)); 487 488 case AF_INET6: 489 { 490 struct sockaddr_in6 sin6; 491 492 memset(&sin6, 0, sizeof(sin6)); 493 memcpy(&sin6, sa, sa->sa_len); 494 sin6.sin6_len = sizeof(struct sockaddr_in6); 495 sin6.sin6_family = AF_INET6; 496 #ifdef __KAME__ 497 if (sa->sa_len == sizeof(struct sockaddr_in6) && 498 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 499 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) || 500 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) && 501 sin6.sin6_scope_id == 0) { 502 sin6.sin6_scope_id = 503 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 504 sin6.sin6_addr.s6_addr[2] = 0; 505 sin6.sin6_addr.s6_addr[3] = 0; 506 } 507 #endif 508 return (routename6(&sin6)); 509 } 510 511 case AF_LINK: 512 return (link_print(sa)); 513 case AF_MPLS: 514 return (label_print(sa)); 515 case AF_UNSPEC: 516 if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) { 517 static char name[RTLABEL_LEN + 2]; 518 struct sockaddr_rtlabel *sr; 519 520 sr = (struct sockaddr_rtlabel *)sa; 521 snprintf(name, sizeof(name), "\"%s\"", sr->sr_label); 522 return (name); 523 } 524 /* FALLTHROUGH */ 525 default: 526 (void)snprintf(line, sizeof(line), "(%d) %s", 527 sa->sa_family, any_ntoa(sa)); 528 break; 529 } 530 return (line); 531 } 532 533 char * 534 routename4(in_addr_t in) 535 { 536 char *cp = NULL; 537 struct in_addr ina; 538 struct hostent *hp; 539 540 if (!cp && !nflag) { 541 if ((hp = gethostbyaddr((char *)&in, 542 sizeof(in), AF_INET)) != NULL) { 543 if ((cp = strchr(hp->h_name, '.')) && 544 !strcmp(cp + 1, domain)) 545 *cp = '\0'; 546 cp = hp->h_name; 547 } 548 } 549 ina.s_addr = in; 550 strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line)); 551 552 return (line); 553 } 554 555 char * 556 routename6(struct sockaddr_in6 *sin6) 557 { 558 int niflags = 0; 559 560 if (nflag) 561 niflags |= NI_NUMERICHOST; 562 else 563 niflags |= NI_NOFQDN; 564 565 if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len, 566 line, sizeof(line), NULL, 0, niflags) != 0) 567 strncpy(line, "invalid", sizeof(line)); 568 569 return (line); 570 } 571 572 char * 573 netname4(in_addr_t in, struct sockaddr_in *maskp) 574 { 575 char *cp = NULL; 576 struct hostent *hp; 577 in_addr_t mask; 578 int mbits; 579 580 mask = maskp && maskp->sin_len != 0 ? ntohl(maskp->sin_addr.s_addr) : 0; 581 if (!nflag && in != INADDR_ANY) { 582 if ((hp = gethostbyaddr((char *)&in, 583 sizeof(in), AF_INET)) != NULL) 584 cp = hp->h_name; 585 } 586 if (in == INADDR_ANY && mask == INADDR_ANY) 587 cp = "default"; 588 mbits = mask ? 33 - ffs(mask) : 0; 589 in = ntohl(in); 590 if (cp) 591 strlcpy(line, cp, sizeof(line)); 592 #define C(x) ((x) & 0xff) 593 else if (mbits < 9) 594 snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits); 595 else if (mbits < 17) 596 snprintf(line, sizeof(line), "%u.%u/%d", 597 C(in >> 24) , C(in >> 16), mbits); 598 else if (mbits < 25) 599 snprintf(line, sizeof(line), "%u.%u.%u/%d", 600 C(in >> 24), C(in >> 16), C(in >> 8), mbits); 601 else 602 snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24), 603 C(in >> 16), C(in >> 8), C(in), mbits); 604 #undef C 605 return (line); 606 } 607 608 char * 609 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask) 610 { 611 struct sockaddr_in6 sin6; 612 u_char *p; 613 int masklen, final = 0, illegal = 0; 614 int i, lim, flag, error; 615 char hbuf[NI_MAXHOST]; 616 617 sin6 = *sa6; 618 619 flag = 0; 620 masklen = 0; 621 if (mask) { 622 lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr); 623 lim = lim < (int)sizeof(struct in6_addr) ? 624 lim : (int)sizeof(struct in6_addr); 625 for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) { 626 if (final && *p) { 627 illegal++; 628 sin6.sin6_addr.s6_addr[i++] = 0x00; 629 continue; 630 } 631 632 switch (*p & 0xff) { 633 case 0xff: 634 masklen += 8; 635 break; 636 case 0xfe: 637 masklen += 7; 638 final++; 639 break; 640 case 0xfc: 641 masklen += 6; 642 final++; 643 break; 644 case 0xf8: 645 masklen += 5; 646 final++; 647 break; 648 case 0xf0: 649 masklen += 4; 650 final++; 651 break; 652 case 0xe0: 653 masklen += 3; 654 final++; 655 break; 656 case 0xc0: 657 masklen += 2; 658 final++; 659 break; 660 case 0x80: 661 masklen += 1; 662 final++; 663 break; 664 case 0x00: 665 final++; 666 break; 667 default: 668 final++; 669 illegal++; 670 break; 671 } 672 673 if (!illegal) 674 sin6.sin6_addr.s6_addr[i++] &= *p; 675 else 676 sin6.sin6_addr.s6_addr[i++] = 0x00; 677 } 678 while (i < (int)sizeof(struct in6_addr)) 679 sin6.sin6_addr.s6_addr[i++] = 0x00; 680 } else 681 masklen = 128; 682 683 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) 684 return ("default"); 685 686 if (illegal) 687 warnx("illegal prefixlen"); 688 689 if (nflag) 690 flag |= NI_NUMERICHOST; 691 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 692 hbuf, sizeof(hbuf), NULL, 0, flag); 693 if (error) 694 snprintf(hbuf, sizeof(hbuf), "invalid"); 695 696 snprintf(line, sizeof(line), "%s/%d", hbuf, masklen); 697 return (line); 698 } 699 700 /* 701 * Return the name of the network whose address is given. 702 * The address is assumed to be that of a net or subnet, not a host. 703 */ 704 char * 705 netname(struct sockaddr *sa, struct sockaddr *mask) 706 { 707 switch (sa->sa_family) { 708 case AF_INET: 709 return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr, 710 (struct sockaddr_in *)mask); 711 case AF_INET6: 712 return netname6((struct sockaddr_in6 *)sa, 713 (struct sockaddr_in6 *)mask); 714 case AF_LINK: 715 return (link_print(sa)); 716 case AF_MPLS: 717 return (label_print(sa)); 718 default: 719 snprintf(line, sizeof(line), "af %d: %s", 720 sa->sa_family, any_ntoa(sa)); 721 break; 722 } 723 return (line); 724 } 725 726 static const char hexlist[] = "0123456789abcdef"; 727 728 char * 729 any_ntoa(const struct sockaddr *sa) 730 { 731 static char obuf[240]; 732 const char *in = sa->sa_data; 733 char *out = obuf; 734 int len = sa->sa_len - offsetof(struct sockaddr, sa_data); 735 736 *out++ = 'Q'; 737 do { 738 *out++ = hexlist[(*in >> 4) & 15]; 739 *out++ = hexlist[(*in++) & 15]; 740 *out++ = '.'; 741 } while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]); 742 out[-1] = '\0'; 743 return (obuf); 744 } 745 746 char * 747 link_print(struct sockaddr *sa) 748 { 749 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 750 u_char *lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen; 751 752 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 753 sdl->sdl_slen == 0) { 754 (void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index); 755 return (line); 756 } 757 switch (sdl->sdl_type) { 758 case IFT_ETHER: 759 case IFT_CARP: 760 return (ether_ntoa((struct ether_addr *)lla)); 761 default: 762 return (link_ntoa(sdl)); 763 } 764 } 765 766 char * 767 mpls_op(u_int32_t type) 768 { 769 switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) { 770 case MPLS_OP_LOCAL: 771 return ("LOCAL"); 772 case MPLS_OP_POP: 773 return ("POP"); 774 case MPLS_OP_SWAP: 775 return ("SWAP"); 776 case MPLS_OP_PUSH: 777 return ("PUSH"); 778 default: 779 return ("?"); 780 } 781 } 782 783 char * 784 label_print(struct sockaddr *sa) 785 { 786 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa; 787 788 if (smpls) 789 (void)snprintf(line, sizeof(line), "%u", 790 ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET); 791 else 792 (void)snprintf(line, sizeof(line), "-"); 793 794 return (line); 795 } 796