1 /* $OpenBSD: show.c,v 1.52 2016/09/03 14:23:14 phessler 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 <netinet/in.h> 41 #include <netinet/if_ether.h> 42 #include <netmpls/mpls.h> 43 #include <arpa/inet.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <netdb.h> 48 #include <stdio.h> 49 #include <stddef.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include <limits.h> 54 55 #include "netstat.h" 56 57 char *any_ntoa(const struct sockaddr *); 58 char *link_print(struct sockaddr *); 59 char *label_print(struct sockaddr *); 60 61 #define ROUNDUP(a) \ 62 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 63 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 64 65 /* 66 * Definitions for showing gateway flags. 67 */ 68 struct bits { 69 int b_mask; 70 char b_val; 71 }; 72 static const struct bits bits[] = { 73 { RTF_UP, 'U' }, 74 { RTF_GATEWAY, 'G' }, 75 { RTF_HOST, 'H' }, 76 { RTF_REJECT, 'R' }, 77 { RTF_DYNAMIC, 'D' }, 78 { RTF_MODIFIED, 'M' }, 79 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 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 p_rtentry(struct rt_msghdr *); 101 void pr_family(int); 102 void p_sockaddr(struct sockaddr *, struct sockaddr *, int, 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 *); 107 108 size_t 109 get_sysctl(const int *mib, u_int mcnt, char **buf) 110 { 111 size_t needed; 112 113 while (1) { 114 if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1) 115 err(1, "sysctl-estimate"); 116 if (needed == 0) 117 break; 118 if ((*buf = realloc(*buf, needed)) == NULL) 119 err(1, NULL); 120 if (sysctl(mib, mcnt, *buf, &needed, NULL, 0) == -1) { 121 if (errno == ENOMEM) 122 continue; 123 err(1, "sysctl"); 124 } 125 break; 126 } 127 128 return needed; 129 } 130 131 /* 132 * Print routing tables. 133 */ 134 void 135 p_rttables(int af, u_int tableid) 136 { 137 struct rt_msghdr *rtm; 138 char *buf = NULL, *next, *lim = NULL; 139 size_t needed; 140 int mib[7], mcnt; 141 struct sockaddr *sa; 142 143 mib[0] = CTL_NET; 144 mib[1] = PF_ROUTE; 145 mib[2] = 0; 146 mib[3] = af; 147 mib[4] = NET_RT_DUMP; 148 mib[5] = 0; 149 mib[6] = tableid; 150 mcnt = 7; 151 152 needed = get_sysctl(mib, mcnt, &buf); 153 lim = buf + needed; 154 155 printf("Routing tables\n"); 156 157 if (buf) { 158 for (next = buf; next < lim; next += rtm->rtm_msglen) { 159 rtm = (struct rt_msghdr *)next; 160 if (rtm->rtm_version != RTM_VERSION) 161 continue; 162 sa = (struct sockaddr *)(next + rtm->rtm_hdrlen); 163 p_rtentry(rtm); 164 } 165 } 166 free(buf); 167 } 168 169 /* 170 * column widths; each followed by one space 171 * width of destination/gateway column 172 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 173 */ 174 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18) 175 176 int 177 WID_DST(int af) 178 { 179 180 if (nflag) 181 switch (af) { 182 case AF_MPLS: 183 return 9; 184 case AF_INET6: 185 return 34; 186 default: 187 return 18; 188 } 189 else 190 switch (af) { 191 case AF_MPLS: 192 return 9; 193 default: 194 return 18; 195 } 196 } 197 198 /* 199 * Print header for routing table columns. 200 */ 201 void 202 pr_rthdr(int af, int Aflag) 203 { 204 if (Aflag) 205 printf("%-*.*s ", PLEN, PLEN, "Address"); 206 switch (af) { 207 case PF_KEY: 208 printf("%-18s %-5s %-18s %-5s %-5s %-22s\n", 209 "Source", "Port", "Destination", 210 "Port", "Proto", "SA(Address/Proto/Type/Direction)"); 211 break; 212 case PF_MPLS: 213 printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s %4.4s %s\n", 214 "In label", "Out label", "Op", "Gateway", 215 "Flags", "Refs", "Use", "Mtu", "Prio", "Interface"); 216 break; 217 default: 218 printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s %4.4s %s", 219 WID_DST(af), WID_DST(af), "Destination", 220 WID_GW(af), WID_GW(af), "Gateway", 221 "Flags", "Refs", "Use", "Mtu", "Prio", "Iface"); 222 if (vflag && !Aflag) 223 printf(" %s", "Label"); 224 putchar('\n'); 225 break; 226 } 227 } 228 229 static void 230 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) 231 { 232 int i; 233 234 for (i = 0; i < RTAX_MAX; i++) { 235 if (addrs & (1 << i)) { 236 rti_info[i] = sa; 237 sa = (struct sockaddr *)((char *)(sa) + 238 ROUNDUP(sa->sa_len)); 239 } else 240 rti_info[i] = NULL; 241 } 242 } 243 244 /* 245 * Print a routing table entry. 246 */ 247 void 248 p_rtentry(struct rt_msghdr *rtm) 249 { 250 static int old_af = -1; 251 struct sockaddr *sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen); 252 struct sockaddr *mask, *rti_info[RTAX_MAX]; 253 char ifbuf[IF_NAMESIZE]; 254 255 if (sa->sa_family == AF_KEY) 256 return; 257 258 get_rtaddrs(rtm->rtm_addrs, sa, rti_info); 259 260 if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) { 261 return; 262 } 263 if (old_af != sa->sa_family) { 264 old_af = sa->sa_family; 265 pr_family(sa->sa_family); 266 pr_rthdr(sa->sa_family, 0); 267 } 268 269 mask = rti_info[RTAX_NETMASK]; 270 if ((sa = rti_info[RTAX_DST]) == NULL) 271 return; 272 273 p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family)); 274 p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls, 275 WID_DST(sa->sa_family)); 276 277 p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST, 278 WID_GW(sa->sa_family)); 279 280 p_flags(rtm->rtm_flags, "%-6.6s "); 281 printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt, 282 rtm->rtm_rmx.rmx_pksent); 283 if (rtm->rtm_rmx.rmx_mtu) 284 printf("%5u ", rtm->rtm_rmx.rmx_mtu); 285 else 286 printf("%5s ", "-"); 287 putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 288 printf(" %2d %-5.16s", rtm->rtm_priority, 289 if_indextoname(rtm->rtm_index, ifbuf)); 290 if (vflag && rti_info[RTAX_LABEL]) 291 printf(" %s", ((struct sockaddr_rtlabel *) 292 rti_info[RTAX_LABEL])->sr_label); 293 putchar('\n'); 294 } 295 296 /* 297 * Print address family header before a section of the routing table. 298 */ 299 void 300 pr_family(int af) 301 { 302 char *afname; 303 304 switch (af) { 305 case AF_INET: 306 afname = "Internet"; 307 break; 308 case AF_INET6: 309 afname = "Internet6"; 310 break; 311 case PF_KEY: 312 afname = "Encap"; 313 break; 314 case AF_MPLS: 315 afname = "MPLS"; 316 break; 317 default: 318 afname = NULL; 319 break; 320 } 321 if (afname) 322 printf("\n%s:\n", afname); 323 else 324 printf("\nProtocol Family %d:\n", af); 325 } 326 327 void 328 p_addr(struct sockaddr *sa, struct sockaddr *mask, int flags) 329 { 330 p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family)); 331 } 332 333 void 334 p_gwaddr(struct sockaddr *sa, int af) 335 { 336 p_sockaddr(sa, 0, RTF_HOST, WID_GW(af)); 337 } 338 339 void 340 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width) 341 { 342 char *cp; 343 344 switch (sa->sa_family) { 345 case AF_INET6: 346 { 347 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 348 struct in6_addr *in6 = &sa6->sin6_addr; 349 350 /* 351 * XXX: This is a special workaround for KAME kernels. 352 * sin6_scope_id field of SA should be set in the future. 353 */ 354 if (IN6_IS_ADDR_LINKLOCAL(in6) || 355 IN6_IS_ADDR_MC_LINKLOCAL(in6) || 356 IN6_IS_ADDR_MC_INTFACELOCAL(in6)) { 357 /* XXX: override is ok? */ 358 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *) 359 &in6->s6_addr[2]); 360 *(u_short *)&in6->s6_addr[2] = 0; 361 } 362 if (flags & RTF_HOST) 363 cp = routename((struct sockaddr *)sa6); 364 else 365 cp = netname((struct sockaddr *)sa6, mask); 366 break; 367 } 368 case AF_MPLS: 369 return; 370 default: 371 if ((flags & RTF_HOST) || mask == NULL) 372 cp = routename(sa); 373 else 374 cp = netname(sa, mask); 375 break; 376 } 377 if (width < 0) 378 printf("%s", cp); 379 else { 380 if (nflag) 381 printf("%-*s ", width, cp); 382 else 383 printf("%-*.*s ", width, width, cp); 384 } 385 } 386 387 static char line[HOST_NAME_MAX+1]; 388 static char domain[HOST_NAME_MAX+1]; 389 390 void 391 p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width) 392 { 393 if (in->sa_family != AF_MPLS) 394 return; 395 396 if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) { 397 printf("%-*s ", width, label_print(in)); 398 printf("%-*s ", width, label_print(NULL)); 399 } else { 400 printf("%-*s ", width, label_print(in)); 401 printf("%-*s ", width, label_print(out)); 402 } 403 404 printf("%-6s ", mpls_op(flags)); 405 } 406 407 void 408 p_flags(int f, char *format) 409 { 410 char name[33], *flags; 411 const struct bits *p = bits; 412 413 for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++) 414 if (p->b_mask & f) 415 *flags++ = p->b_val; 416 *flags = '\0'; 417 printf(format, name); 418 } 419 420 char * 421 routename(struct sockaddr *sa) 422 { 423 char *cp = NULL; 424 static int first = 1; 425 426 if (first) { 427 first = 0; 428 if (gethostname(domain, sizeof(domain)) == 0 && 429 (cp = strchr(domain, '.'))) 430 (void)strlcpy(domain, cp + 1, sizeof(domain)); 431 else 432 domain[0] = '\0'; 433 cp = NULL; 434 } 435 436 if (sa->sa_len == 0) { 437 (void)strlcpy(line, "default", sizeof(line)); 438 return (line); 439 } 440 441 switch (sa->sa_family) { 442 case AF_INET: 443 return 444 (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr)); 445 446 case AF_INET6: 447 { 448 struct sockaddr_in6 sin6; 449 450 memset(&sin6, 0, sizeof(sin6)); 451 memcpy(&sin6, sa, sa->sa_len); 452 sin6.sin6_len = sizeof(struct sockaddr_in6); 453 sin6.sin6_family = AF_INET6; 454 if (sa->sa_len == sizeof(struct sockaddr_in6) && 455 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 456 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) || 457 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) && 458 sin6.sin6_scope_id == 0) { 459 sin6.sin6_scope_id = 460 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 461 sin6.sin6_addr.s6_addr[2] = 0; 462 sin6.sin6_addr.s6_addr[3] = 0; 463 } 464 return (routename6(&sin6)); 465 } 466 467 case AF_LINK: 468 return (link_print(sa)); 469 case AF_MPLS: 470 return (label_print(sa)); 471 case AF_UNSPEC: 472 if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) { 473 static char name[RTLABEL_LEN]; 474 struct sockaddr_rtlabel *sr; 475 476 sr = (struct sockaddr_rtlabel *)sa; 477 (void)strlcpy(name, sr->sr_label, sizeof(name)); 478 return (name); 479 } 480 /* FALLTHROUGH */ 481 default: 482 (void)snprintf(line, sizeof(line), "(%d) %s", 483 sa->sa_family, any_ntoa(sa)); 484 break; 485 } 486 return (line); 487 } 488 489 char * 490 routename4(in_addr_t in) 491 { 492 char *cp = NULL; 493 struct in_addr ina; 494 struct hostent *hp; 495 496 if (in == INADDR_ANY) 497 cp = "default"; 498 if (!cp && !nflag) { 499 if ((hp = gethostbyaddr((char *)&in, 500 sizeof(in), AF_INET)) != NULL) { 501 if ((cp = strchr(hp->h_name, '.')) && 502 !strcmp(cp + 1, domain)) 503 *cp = '\0'; 504 cp = hp->h_name; 505 } 506 } 507 ina.s_addr = in; 508 strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line)); 509 510 return (line); 511 } 512 513 char * 514 routename6(struct sockaddr_in6 *sin6) 515 { 516 int niflags = 0; 517 518 if (nflag) 519 niflags |= NI_NUMERICHOST; 520 else 521 niflags |= NI_NOFQDN; 522 523 if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len, 524 line, sizeof(line), NULL, 0, niflags) != 0) 525 strncpy(line, "invalid", sizeof(line)); 526 527 return (line); 528 } 529 530 /* 531 * Return the name of the network whose address is given. 532 * The address is assumed to be that of a net or subnet, not a host. 533 */ 534 char * 535 netname4(in_addr_t in, in_addr_t mask) 536 { 537 int mbits; 538 539 in = ntohl(in); 540 mask = ntohl(mask); 541 mbits = mask ? 33 - ffs(mask) : 0; 542 if (in == INADDR_ANY && mask == INADDR_ANY) 543 strlcpy(line, "default", sizeof(line)); 544 #define C(x) ((x) & 0xff) 545 else if (mbits < 9) 546 snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits); 547 else if (mbits < 17) 548 snprintf(line, sizeof(line), "%u.%u/%d", 549 C(in >> 24) , C(in >> 16), mbits); 550 else if (mbits < 25) 551 snprintf(line, sizeof(line), "%u.%u.%u/%d", 552 C(in >> 24), C(in >> 16), C(in >> 8), mbits); 553 else 554 snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24), 555 C(in >> 16), C(in >> 8), C(in), mbits); 556 #undef C 557 return (line); 558 } 559 560 char * 561 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask) 562 { 563 struct sockaddr_in6 sin6; 564 u_char *p; 565 int masklen, final = 0, illegal = 0; 566 int i, lim, flag, error; 567 char hbuf[NI_MAXHOST]; 568 569 sin6 = *sa6; 570 571 flag = 0; 572 masklen = 0; 573 if (mask) { 574 lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr); 575 lim = lim < (int)sizeof(struct in6_addr) ? 576 lim : (int)sizeof(struct in6_addr); 577 for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) { 578 if (final && *p) { 579 illegal++; 580 sin6.sin6_addr.s6_addr[i++] = 0x00; 581 continue; 582 } 583 584 switch (*p & 0xff) { 585 case 0xff: 586 masklen += 8; 587 break; 588 case 0xfe: 589 masklen += 7; 590 final++; 591 break; 592 case 0xfc: 593 masklen += 6; 594 final++; 595 break; 596 case 0xf8: 597 masklen += 5; 598 final++; 599 break; 600 case 0xf0: 601 masklen += 4; 602 final++; 603 break; 604 case 0xe0: 605 masklen += 3; 606 final++; 607 break; 608 case 0xc0: 609 masklen += 2; 610 final++; 611 break; 612 case 0x80: 613 masklen += 1; 614 final++; 615 break; 616 case 0x00: 617 final++; 618 break; 619 default: 620 final++; 621 illegal++; 622 break; 623 } 624 625 if (!illegal) 626 sin6.sin6_addr.s6_addr[i++] &= *p; 627 else 628 sin6.sin6_addr.s6_addr[i++] = 0x00; 629 } 630 while (i < (int)sizeof(struct in6_addr)) 631 sin6.sin6_addr.s6_addr[i++] = 0x00; 632 } else 633 masklen = 128; 634 635 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) 636 return ("default"); 637 638 if (illegal) 639 warnx("illegal prefixlen"); 640 641 if (nflag) 642 flag |= NI_NUMERICHOST; 643 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 644 hbuf, sizeof(hbuf), NULL, 0, flag); 645 if (error) 646 snprintf(hbuf, sizeof(hbuf), "invalid"); 647 648 snprintf(line, sizeof(line), "%s/%d", hbuf, masklen); 649 return (line); 650 } 651 652 /* 653 * Return the name of the network whose address is given. 654 * The address is assumed to be that of a net or subnet, not a host. 655 */ 656 char * 657 netname(struct sockaddr *sa, struct sockaddr *mask) 658 { 659 switch (sa->sa_family) { 660 case AF_INET: 661 return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr, 662 mask->sa_len == 0 ? 0 : 663 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 664 case AF_INET6: 665 return netname6((struct sockaddr_in6 *)sa, 666 (struct sockaddr_in6 *)mask); 667 case AF_LINK: 668 return (link_print(sa)); 669 case AF_MPLS: 670 return (label_print(sa)); 671 default: 672 snprintf(line, sizeof(line), "af %d: %s", 673 sa->sa_family, any_ntoa(sa)); 674 break; 675 } 676 return (line); 677 } 678 679 static const char hexlist[] = "0123456789abcdef"; 680 681 char * 682 any_ntoa(const struct sockaddr *sa) 683 { 684 static char obuf[240]; 685 const char *in = sa->sa_data; 686 char *out = obuf; 687 int len = sa->sa_len - offsetof(struct sockaddr, sa_data); 688 689 *out++ = 'Q'; 690 do { 691 *out++ = hexlist[(*in >> 4) & 15]; 692 *out++ = hexlist[(*in++) & 15]; 693 *out++ = '.'; 694 } while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]); 695 out[-1] = '\0'; 696 return (obuf); 697 } 698 699 char * 700 link_print(struct sockaddr *sa) 701 { 702 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 703 u_char *lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen; 704 705 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 706 sdl->sdl_slen == 0) { 707 (void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index); 708 return (line); 709 } 710 switch (sdl->sdl_type) { 711 case IFT_ETHER: 712 case IFT_CARP: 713 return (ether_ntoa((struct ether_addr *)lla)); 714 default: 715 return (link_ntoa(sdl)); 716 } 717 } 718 719 char * 720 mpls_op(u_int32_t type) 721 { 722 switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) { 723 case MPLS_OP_LOCAL: 724 return ("LOCAL"); 725 case MPLS_OP_POP: 726 return ("POP"); 727 case MPLS_OP_SWAP: 728 return ("SWAP"); 729 case MPLS_OP_PUSH: 730 return ("PUSH"); 731 default: 732 return ("?"); 733 } 734 } 735 736 char * 737 label_print(struct sockaddr *sa) 738 { 739 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa; 740 741 if (smpls) 742 (void)snprintf(line, sizeof(line), "%u", 743 ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET); 744 else 745 (void)snprintf(line, sizeof(line), "-"); 746 747 return (line); 748 } 749