1 /* $OpenBSD: show.c,v 1.50 2016/07/13 08:40:46 mpi 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_BLACKHOLE, 'B' }, 78 { RTF_DYNAMIC, 'D' }, 79 { RTF_MODIFIED, 'M' }, 80 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 81 { RTF_CLONING, 'C' }, 82 { RTF_MULTICAST,'m' }, 83 { RTF_LLINFO, 'L' }, 84 { RTF_STATIC, 'S' }, 85 { RTF_PROTO1, '1' }, 86 { RTF_PROTO2, '2' }, 87 { RTF_PROTO3, '3' }, 88 { RTF_CLONED, 'c' }, 89 { RTF_MPATH, 'P' }, 90 { RTF_MPLS, 'T' }, 91 { RTF_LOCAL, 'l' }, 92 { RTF_BROADCAST, 'b' }, 93 { 0 } 94 }; 95 96 int WID_DST(int); 97 void p_rtentry(struct rt_msghdr *); 98 void pr_family(int); 99 void p_sockaddr(struct sockaddr *, struct sockaddr *, int, int); 100 void p_sockaddr_mpls(struct sockaddr *, struct sockaddr *, int, int); 101 void p_flags(int, char *); 102 char *routename4(in_addr_t); 103 char *routename6(struct sockaddr_in6 *); 104 105 size_t 106 get_sysctl(const int *mib, u_int mcnt, char **buf) 107 { 108 size_t needed; 109 110 while (1) { 111 if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1) 112 err(1, "sysctl-estimate"); 113 if (needed == 0) 114 break; 115 if ((*buf = realloc(*buf, needed)) == NULL) 116 err(1, NULL); 117 if (sysctl(mib, mcnt, *buf, &needed, NULL, 0) == -1) { 118 if (errno == ENOMEM) 119 continue; 120 err(1, "sysctl"); 121 } 122 break; 123 } 124 125 return needed; 126 } 127 128 /* 129 * Print routing tables. 130 */ 131 void 132 p_rttables(int af, u_int tableid) 133 { 134 struct rt_msghdr *rtm; 135 char *buf = NULL, *next, *lim = NULL; 136 size_t needed; 137 int mib[7], mcnt; 138 struct sockaddr *sa; 139 140 mib[0] = CTL_NET; 141 mib[1] = PF_ROUTE; 142 mib[2] = 0; 143 mib[3] = af; 144 mib[4] = NET_RT_DUMP; 145 mib[5] = 0; 146 mib[6] = tableid; 147 mcnt = 7; 148 149 needed = get_sysctl(mib, mcnt, &buf); 150 lim = buf + needed; 151 152 printf("Routing tables\n"); 153 154 if (buf) { 155 for (next = buf; next < lim; next += rtm->rtm_msglen) { 156 rtm = (struct rt_msghdr *)next; 157 if (rtm->rtm_version != RTM_VERSION) 158 continue; 159 sa = (struct sockaddr *)(next + rtm->rtm_hdrlen); 160 p_rtentry(rtm); 161 } 162 } 163 free(buf); 164 } 165 166 /* 167 * column widths; each followed by one space 168 * width of destination/gateway column 169 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 170 */ 171 #define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18) 172 173 int 174 WID_DST(int af) 175 { 176 177 if (nflag) 178 switch (af) { 179 case AF_MPLS: 180 return 9; 181 case AF_INET6: 182 return 34; 183 default: 184 return 18; 185 } 186 else 187 switch (af) { 188 case AF_MPLS: 189 return 9; 190 default: 191 return 18; 192 } 193 } 194 195 /* 196 * Print header for routing table columns. 197 */ 198 void 199 pr_rthdr(int af, int Aflag) 200 { 201 if (Aflag) 202 printf("%-*.*s ", PLEN, PLEN, "Address"); 203 switch (af) { 204 case PF_KEY: 205 printf("%-18s %-5s %-18s %-5s %-5s %-22s\n", 206 "Source", "Port", "Destination", 207 "Port", "Proto", "SA(Address/Proto/Type/Direction)"); 208 break; 209 case PF_MPLS: 210 printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s %4.4s %s\n", 211 "In label", "Out label", "Op", "Gateway", 212 "Flags", "Refs", "Use", "Mtu", "Prio", "Interface"); 213 break; 214 default: 215 printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s %4.4s %s", 216 WID_DST(af), WID_DST(af), "Destination", 217 WID_GW(af), WID_GW(af), "Gateway", 218 "Flags", "Refs", "Use", "Mtu", "Prio", "Iface"); 219 if (vflag && !Aflag) 220 printf(" %s", "Label"); 221 putchar('\n'); 222 break; 223 } 224 } 225 226 static void 227 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) 228 { 229 int i; 230 231 for (i = 0; i < RTAX_MAX; i++) { 232 if (addrs & (1 << i)) { 233 rti_info[i] = sa; 234 sa = (struct sockaddr *)((char *)(sa) + 235 ROUNDUP(sa->sa_len)); 236 } else 237 rti_info[i] = NULL; 238 } 239 } 240 241 /* 242 * Print a routing table entry. 243 */ 244 void 245 p_rtentry(struct rt_msghdr *rtm) 246 { 247 static int old_af = -1; 248 struct sockaddr *sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen); 249 struct sockaddr *mask, *rti_info[RTAX_MAX]; 250 char ifbuf[IF_NAMESIZE]; 251 252 if (sa->sa_family == AF_KEY) 253 return; 254 255 get_rtaddrs(rtm->rtm_addrs, sa, rti_info); 256 257 if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) { 258 return; 259 } 260 if (old_af != sa->sa_family) { 261 old_af = sa->sa_family; 262 pr_family(sa->sa_family); 263 pr_rthdr(sa->sa_family, 0); 264 } 265 266 mask = rti_info[RTAX_NETMASK]; 267 if ((sa = rti_info[RTAX_DST]) == NULL) 268 return; 269 270 p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family)); 271 p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls, 272 WID_DST(sa->sa_family)); 273 274 p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST, 275 WID_GW(sa->sa_family)); 276 277 p_flags(rtm->rtm_flags, "%-6.6s "); 278 printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt, 279 rtm->rtm_rmx.rmx_pksent); 280 if (rtm->rtm_rmx.rmx_mtu) 281 printf("%5u ", rtm->rtm_rmx.rmx_mtu); 282 else 283 printf("%5s ", "-"); 284 putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 285 printf(" %2d %-5.16s", rtm->rtm_priority, 286 if_indextoname(rtm->rtm_index, ifbuf)); 287 if (vflag && rti_info[RTAX_LABEL]) 288 printf(" %s", ((struct sockaddr_rtlabel *) 289 rti_info[RTAX_LABEL])->sr_label); 290 putchar('\n'); 291 } 292 293 /* 294 * Print address family header before a section of the routing table. 295 */ 296 void 297 pr_family(int af) 298 { 299 char *afname; 300 301 switch (af) { 302 case AF_INET: 303 afname = "Internet"; 304 break; 305 case AF_INET6: 306 afname = "Internet6"; 307 break; 308 case PF_KEY: 309 afname = "Encap"; 310 break; 311 case AF_MPLS: 312 afname = "MPLS"; 313 break; 314 default: 315 afname = NULL; 316 break; 317 } 318 if (afname) 319 printf("\n%s:\n", afname); 320 else 321 printf("\nProtocol Family %d:\n", af); 322 } 323 324 void 325 p_addr(struct sockaddr *sa, struct sockaddr *mask, int flags) 326 { 327 p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family)); 328 } 329 330 void 331 p_gwaddr(struct sockaddr *sa, int af) 332 { 333 p_sockaddr(sa, 0, RTF_HOST, WID_GW(af)); 334 } 335 336 void 337 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width) 338 { 339 char *cp; 340 341 switch (sa->sa_family) { 342 case AF_INET6: 343 { 344 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 345 struct in6_addr *in6 = &sa6->sin6_addr; 346 347 /* 348 * XXX: This is a special workaround for KAME kernels. 349 * sin6_scope_id field of SA should be set in the future. 350 */ 351 if (IN6_IS_ADDR_LINKLOCAL(in6) || 352 IN6_IS_ADDR_MC_LINKLOCAL(in6) || 353 IN6_IS_ADDR_MC_INTFACELOCAL(in6)) { 354 /* XXX: override is ok? */ 355 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *) 356 &in6->s6_addr[2]); 357 *(u_short *)&in6->s6_addr[2] = 0; 358 } 359 if (flags & RTF_HOST) 360 cp = routename((struct sockaddr *)sa6); 361 else 362 cp = netname((struct sockaddr *)sa6, mask); 363 break; 364 } 365 case AF_MPLS: 366 return; 367 default: 368 if ((flags & RTF_HOST) || mask == NULL) 369 cp = routename(sa); 370 else 371 cp = netname(sa, mask); 372 break; 373 } 374 if (width < 0) 375 printf("%s", cp); 376 else { 377 if (nflag) 378 printf("%-*s ", width, cp); 379 else 380 printf("%-*.*s ", width, width, cp); 381 } 382 } 383 384 static char line[HOST_NAME_MAX+1]; 385 static char domain[HOST_NAME_MAX+1]; 386 387 void 388 p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width) 389 { 390 if (in->sa_family != AF_MPLS) 391 return; 392 393 if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) { 394 printf("%-*s ", width, label_print(in)); 395 printf("%-*s ", width, label_print(NULL)); 396 } else { 397 printf("%-*s ", width, label_print(in)); 398 printf("%-*s ", width, label_print(out)); 399 } 400 401 printf("%-6s ", mpls_op(flags)); 402 } 403 404 void 405 p_flags(int f, char *format) 406 { 407 char name[33], *flags; 408 const struct bits *p = bits; 409 410 for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++) 411 if (p->b_mask & f) 412 *flags++ = p->b_val; 413 *flags = '\0'; 414 printf(format, name); 415 } 416 417 char * 418 routename(struct sockaddr *sa) 419 { 420 char *cp = NULL; 421 static int first = 1; 422 423 if (first) { 424 first = 0; 425 if (gethostname(domain, sizeof(domain)) == 0 && 426 (cp = strchr(domain, '.'))) 427 (void)strlcpy(domain, cp + 1, sizeof(domain)); 428 else 429 domain[0] = '\0'; 430 cp = NULL; 431 } 432 433 if (sa->sa_len == 0) { 434 (void)strlcpy(line, "default", sizeof(line)); 435 return (line); 436 } 437 438 switch (sa->sa_family) { 439 case AF_INET: 440 return 441 (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr)); 442 443 case AF_INET6: 444 { 445 struct sockaddr_in6 sin6; 446 447 memset(&sin6, 0, sizeof(sin6)); 448 memcpy(&sin6, sa, sa->sa_len); 449 sin6.sin6_len = sizeof(struct sockaddr_in6); 450 sin6.sin6_family = AF_INET6; 451 if (sa->sa_len == sizeof(struct sockaddr_in6) && 452 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 453 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) || 454 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) && 455 sin6.sin6_scope_id == 0) { 456 sin6.sin6_scope_id = 457 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 458 sin6.sin6_addr.s6_addr[2] = 0; 459 sin6.sin6_addr.s6_addr[3] = 0; 460 } 461 return (routename6(&sin6)); 462 } 463 464 case AF_LINK: 465 return (link_print(sa)); 466 case AF_MPLS: 467 return (label_print(sa)); 468 case AF_UNSPEC: 469 if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) { 470 static char name[RTLABEL_LEN]; 471 struct sockaddr_rtlabel *sr; 472 473 sr = (struct sockaddr_rtlabel *)sa; 474 (void)strlcpy(name, sr->sr_label, sizeof(name)); 475 return (name); 476 } 477 /* FALLTHROUGH */ 478 default: 479 (void)snprintf(line, sizeof(line), "(%d) %s", 480 sa->sa_family, any_ntoa(sa)); 481 break; 482 } 483 return (line); 484 } 485 486 char * 487 routename4(in_addr_t in) 488 { 489 char *cp = NULL; 490 struct in_addr ina; 491 struct hostent *hp; 492 493 if (in == INADDR_ANY) 494 cp = "default"; 495 if (!cp && !nflag) { 496 if ((hp = gethostbyaddr((char *)&in, 497 sizeof(in), AF_INET)) != NULL) { 498 if ((cp = strchr(hp->h_name, '.')) && 499 !strcmp(cp + 1, domain)) 500 *cp = '\0'; 501 cp = hp->h_name; 502 } 503 } 504 ina.s_addr = in; 505 strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line)); 506 507 return (line); 508 } 509 510 char * 511 routename6(struct sockaddr_in6 *sin6) 512 { 513 int niflags = 0; 514 515 if (nflag) 516 niflags |= NI_NUMERICHOST; 517 else 518 niflags |= NI_NOFQDN; 519 520 if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len, 521 line, sizeof(line), NULL, 0, niflags) != 0) 522 strncpy(line, "invalid", sizeof(line)); 523 524 return (line); 525 } 526 527 /* 528 * Return the name of the network whose address is given. 529 * The address is assumed to be that of a net or subnet, not a host. 530 */ 531 char * 532 netname4(in_addr_t in, in_addr_t mask) 533 { 534 int mbits; 535 536 in = ntohl(in); 537 mask = ntohl(mask); 538 mbits = mask ? 33 - ffs(mask) : 0; 539 if (in == INADDR_ANY && mask == INADDR_ANY) 540 strlcpy(line, "default", sizeof(line)); 541 #define C(x) ((x) & 0xff) 542 else if (mbits < 9) 543 snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits); 544 else if (mbits < 17) 545 snprintf(line, sizeof(line), "%u.%u/%d", 546 C(in >> 24) , C(in >> 16), mbits); 547 else if (mbits < 25) 548 snprintf(line, sizeof(line), "%u.%u.%u/%d", 549 C(in >> 24), C(in >> 16), C(in >> 8), mbits); 550 else 551 snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24), 552 C(in >> 16), C(in >> 8), C(in), mbits); 553 #undef C 554 return (line); 555 } 556 557 char * 558 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask) 559 { 560 struct sockaddr_in6 sin6; 561 u_char *p; 562 int masklen, final = 0, illegal = 0; 563 int i, lim, flag, error; 564 char hbuf[NI_MAXHOST]; 565 566 sin6 = *sa6; 567 568 flag = 0; 569 masklen = 0; 570 if (mask) { 571 lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr); 572 lim = lim < (int)sizeof(struct in6_addr) ? 573 lim : (int)sizeof(struct in6_addr); 574 for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) { 575 if (final && *p) { 576 illegal++; 577 sin6.sin6_addr.s6_addr[i++] = 0x00; 578 continue; 579 } 580 581 switch (*p & 0xff) { 582 case 0xff: 583 masklen += 8; 584 break; 585 case 0xfe: 586 masklen += 7; 587 final++; 588 break; 589 case 0xfc: 590 masklen += 6; 591 final++; 592 break; 593 case 0xf8: 594 masklen += 5; 595 final++; 596 break; 597 case 0xf0: 598 masklen += 4; 599 final++; 600 break; 601 case 0xe0: 602 masklen += 3; 603 final++; 604 break; 605 case 0xc0: 606 masklen += 2; 607 final++; 608 break; 609 case 0x80: 610 masklen += 1; 611 final++; 612 break; 613 case 0x00: 614 final++; 615 break; 616 default: 617 final++; 618 illegal++; 619 break; 620 } 621 622 if (!illegal) 623 sin6.sin6_addr.s6_addr[i++] &= *p; 624 else 625 sin6.sin6_addr.s6_addr[i++] = 0x00; 626 } 627 while (i < (int)sizeof(struct in6_addr)) 628 sin6.sin6_addr.s6_addr[i++] = 0x00; 629 } else 630 masklen = 128; 631 632 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) 633 return ("default"); 634 635 if (illegal) 636 warnx("illegal prefixlen"); 637 638 if (nflag) 639 flag |= NI_NUMERICHOST; 640 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 641 hbuf, sizeof(hbuf), NULL, 0, flag); 642 if (error) 643 snprintf(hbuf, sizeof(hbuf), "invalid"); 644 645 snprintf(line, sizeof(line), "%s/%d", hbuf, masklen); 646 return (line); 647 } 648 649 /* 650 * Return the name of the network whose address is given. 651 * The address is assumed to be that of a net or subnet, not a host. 652 */ 653 char * 654 netname(struct sockaddr *sa, struct sockaddr *mask) 655 { 656 switch (sa->sa_family) { 657 case AF_INET: 658 return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr, 659 mask->sa_len == 0 ? 0 : 660 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 661 case AF_INET6: 662 return netname6((struct sockaddr_in6 *)sa, 663 (struct sockaddr_in6 *)mask); 664 case AF_LINK: 665 return (link_print(sa)); 666 case AF_MPLS: 667 return (label_print(sa)); 668 default: 669 snprintf(line, sizeof(line), "af %d: %s", 670 sa->sa_family, any_ntoa(sa)); 671 break; 672 } 673 return (line); 674 } 675 676 static const char hexlist[] = "0123456789abcdef"; 677 678 char * 679 any_ntoa(const struct sockaddr *sa) 680 { 681 static char obuf[240]; 682 const char *in = sa->sa_data; 683 char *out = obuf; 684 int len = sa->sa_len - offsetof(struct sockaddr, sa_data); 685 686 *out++ = 'Q'; 687 do { 688 *out++ = hexlist[(*in >> 4) & 15]; 689 *out++ = hexlist[(*in++) & 15]; 690 *out++ = '.'; 691 } while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]); 692 out[-1] = '\0'; 693 return (obuf); 694 } 695 696 char * 697 link_print(struct sockaddr *sa) 698 { 699 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 700 u_char *lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen; 701 702 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 703 sdl->sdl_slen == 0) { 704 (void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index); 705 return (line); 706 } 707 switch (sdl->sdl_type) { 708 case IFT_ETHER: 709 case IFT_CARP: 710 return (ether_ntoa((struct ether_addr *)lla)); 711 default: 712 return (link_ntoa(sdl)); 713 } 714 } 715 716 char * 717 mpls_op(u_int32_t type) 718 { 719 switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) { 720 case MPLS_OP_LOCAL: 721 return ("LOCAL"); 722 case MPLS_OP_POP: 723 return ("POP"); 724 case MPLS_OP_SWAP: 725 return ("SWAP"); 726 case MPLS_OP_PUSH: 727 return ("PUSH"); 728 default: 729 return ("?"); 730 } 731 } 732 733 char * 734 label_print(struct sockaddr *sa) 735 { 736 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa; 737 738 if (smpls) 739 (void)snprintf(line, sizeof(line), "%u", 740 ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET); 741 else 742 (void)snprintf(line, sizeof(line), "-"); 743 744 return (line); 745 } 746