1 /* $OpenBSD: show.c,v 1.56 2020/09/15 20:28:27 pamela 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; 141 142 mib[0] = CTL_NET; 143 mib[1] = PF_ROUTE; 144 mib[2] = 0; 145 mib[3] = af; 146 mib[4] = NET_RT_DUMP; 147 mib[5] = 0; 148 mib[6] = tableid; 149 mcnt = 7; 150 151 needed = get_sysctl(mib, mcnt, &buf); 152 lim = buf + needed; 153 154 printf("Routing tables\n"); 155 156 if (buf) { 157 for (next = buf; next < lim; next += rtm->rtm_msglen) { 158 rtm = (struct rt_msghdr *)next; 159 if (rtm->rtm_version != RTM_VERSION) 160 continue; 161 p_rtentry(rtm); 162 } 163 } 164 free(buf); 165 } 166 167 /* 168 * column widths; each followed by one space 169 * width of destination/gateway column 170 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 171 */ 172 #define WID_GW(af) ((af) == AF_INET6 ? 30 : 18) 173 174 int 175 WID_DST(int af) 176 { 177 178 switch (af) { 179 case AF_MPLS: 180 return 9; 181 case AF_INET6: 182 return 34; 183 default: 184 return 18; 185 } 186 } 187 188 /* 189 * Print header for routing table columns. 190 */ 191 void 192 pr_rthdr(int af, int Aflag) 193 { 194 if (Aflag) 195 printf("%-*.*s ", PLEN, PLEN, "Address"); 196 switch (af) { 197 case PF_KEY: 198 printf("%-18s %-5s %-18s %-5s %-5s %-22s\n", 199 "Source", "Port", "Destination", 200 "Port", "Proto", "SA(Address/Proto/Type/Direction)"); 201 break; 202 case PF_MPLS: 203 printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s %4.4s %s\n", 204 "In label", "Out label", "Op", "Gateway", 205 "Flags", "Refs", "Use", "Mtu", "Prio", "Interface"); 206 break; 207 default: 208 printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s %4.4s %s", 209 WID_DST(af), WID_DST(af), "Destination", 210 WID_GW(af), WID_GW(af), "Gateway", 211 "Flags", "Refs", "Use", "Mtu", "Prio", "Iface"); 212 if (vflag && !Aflag) 213 printf(" %s", "Label"); 214 putchar('\n'); 215 break; 216 } 217 } 218 219 static void 220 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) 221 { 222 int i; 223 224 for (i = 0; i < RTAX_MAX; i++) { 225 if (addrs & (1 << i)) { 226 rti_info[i] = sa; 227 sa = (struct sockaddr *)((char *)(sa) + 228 ROUNDUP(sa->sa_len)); 229 } else 230 rti_info[i] = NULL; 231 } 232 } 233 234 /* 235 * Print a routing table entry. 236 */ 237 void 238 p_rtentry(struct rt_msghdr *rtm) 239 { 240 static int old_af = -1; 241 struct sockaddr *sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen); 242 struct sockaddr *mask, *rti_info[RTAX_MAX]; 243 char ifbuf[IF_NAMESIZE]; 244 245 if (sa->sa_family == AF_KEY) 246 return; 247 248 get_rtaddrs(rtm->rtm_addrs, sa, rti_info); 249 250 if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) { 251 return; 252 } 253 if (old_af != sa->sa_family) { 254 old_af = sa->sa_family; 255 pr_family(sa->sa_family); 256 pr_rthdr(sa->sa_family, 0); 257 } 258 259 mask = rti_info[RTAX_NETMASK]; 260 if ((sa = rti_info[RTAX_DST]) == NULL) 261 return; 262 263 p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family)); 264 p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls, 265 WID_DST(sa->sa_family)); 266 267 p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST, 268 WID_GW(sa->sa_family)); 269 270 p_flags(rtm->rtm_flags, "%-6.6s "); 271 printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt, 272 rtm->rtm_rmx.rmx_pksent); 273 if (rtm->rtm_rmx.rmx_mtu) 274 printf("%5u ", rtm->rtm_rmx.rmx_mtu); 275 else 276 printf("%5s ", "-"); 277 putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 278 printf(" %2d %-5.16s", rtm->rtm_priority, 279 if_indextoname(rtm->rtm_index, ifbuf)); 280 if (vflag && rti_info[RTAX_LABEL]) 281 printf(" %s", ((struct sockaddr_rtlabel *) 282 rti_info[RTAX_LABEL])->sr_label); 283 putchar('\n'); 284 } 285 286 /* 287 * Print address family header before a section of the routing table. 288 */ 289 void 290 pr_family(int af) 291 { 292 char *afname; 293 294 switch (af) { 295 case AF_INET: 296 afname = "Internet"; 297 break; 298 case AF_INET6: 299 afname = "Internet6"; 300 break; 301 case PF_KEY: 302 afname = "Encap"; 303 break; 304 case AF_MPLS: 305 afname = "MPLS"; 306 break; 307 default: 308 afname = NULL; 309 break; 310 } 311 if (afname) 312 printf("\n%s:\n", afname); 313 else 314 printf("\nProtocol Family %d:\n", af); 315 } 316 317 void 318 p_addr(struct sockaddr *sa, struct sockaddr *mask, int flags) 319 { 320 p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family)); 321 } 322 323 void 324 p_gwaddr(struct sockaddr *sa, int af) 325 { 326 p_sockaddr(sa, 0, RTF_HOST, WID_GW(af)); 327 } 328 329 void 330 p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width) 331 { 332 char *cp; 333 334 switch (sa->sa_family) { 335 case AF_INET6: 336 { 337 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 338 struct in6_addr *in6 = &sa6->sin6_addr; 339 340 /* 341 * XXX: This is a special workaround for KAME kernels. 342 * sin6_scope_id field of SA should be set in the future. 343 */ 344 if (IN6_IS_ADDR_LINKLOCAL(in6) || 345 IN6_IS_ADDR_MC_LINKLOCAL(in6) || 346 IN6_IS_ADDR_MC_INTFACELOCAL(in6)) { 347 /* XXX: override is ok? */ 348 sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *) 349 &in6->s6_addr[2]); 350 *(u_short *)&in6->s6_addr[2] = 0; 351 } 352 if (flags & RTF_HOST) 353 cp = routename((struct sockaddr *)sa6); 354 else 355 cp = netname((struct sockaddr *)sa6, mask); 356 break; 357 } 358 case AF_MPLS: 359 return; 360 default: 361 if ((flags & RTF_HOST) || mask == NULL) 362 cp = routename(sa); 363 else 364 cp = netname(sa, mask); 365 break; 366 } 367 if (width < 0) 368 printf("%s", cp); 369 else { 370 if (nflag) 371 printf("%-*s ", width, cp); 372 else 373 printf("%-*.*s ", width, width, cp); 374 } 375 } 376 377 static char line[HOST_NAME_MAX+1]; 378 static char domain[HOST_NAME_MAX+1]; 379 380 void 381 p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width) 382 { 383 if (in->sa_family != AF_MPLS) 384 return; 385 386 if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) { 387 printf("%-*s ", width, label_print(in)); 388 printf("%-*s ", width, label_print(NULL)); 389 } else { 390 printf("%-*s ", width, label_print(in)); 391 printf("%-*s ", width, label_print(out)); 392 } 393 394 printf("%-6s ", mpls_op(flags)); 395 } 396 397 void 398 p_flags(int f, char *format) 399 { 400 char name[33], *flags; 401 const struct bits *p = bits; 402 403 for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++) 404 if (p->b_mask & f) 405 *flags++ = p->b_val; 406 *flags = '\0'; 407 printf(format, name); 408 } 409 410 char * 411 routename(struct sockaddr *sa) 412 { 413 char *cp = NULL; 414 static int first = 1; 415 416 if (first) { 417 first = 0; 418 if (gethostname(domain, sizeof(domain)) == 0 && 419 (cp = strchr(domain, '.'))) 420 (void)strlcpy(domain, cp + 1, sizeof(domain)); 421 else 422 domain[0] = '\0'; 423 cp = NULL; 424 } 425 426 if (sa->sa_len == 0) { 427 (void)strlcpy(line, "default", sizeof(line)); 428 return (line); 429 } 430 431 switch (sa->sa_family) { 432 case AF_INET: 433 return 434 (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr)); 435 436 case AF_INET6: 437 { 438 struct sockaddr_in6 sin6; 439 440 memset(&sin6, 0, sizeof(sin6)); 441 memcpy(&sin6, sa, sa->sa_len); 442 sin6.sin6_family = AF_INET6; 443 if (sa->sa_len == sizeof(struct sockaddr_in6) && 444 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 445 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) || 446 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) && 447 sin6.sin6_scope_id == 0) { 448 sin6.sin6_scope_id = 449 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 450 sin6.sin6_addr.s6_addr[2] = 0; 451 sin6.sin6_addr.s6_addr[3] = 0; 452 } 453 return (routename6(&sin6)); 454 } 455 456 case AF_LINK: 457 return (link_print(sa)); 458 case AF_MPLS: 459 return (label_print(sa)); 460 case AF_UNSPEC: 461 if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) { 462 static char name[RTLABEL_LEN]; 463 struct sockaddr_rtlabel *sr; 464 465 sr = (struct sockaddr_rtlabel *)sa; 466 (void)strlcpy(name, sr->sr_label, sizeof(name)); 467 return (name); 468 } 469 /* FALLTHROUGH */ 470 default: 471 (void)snprintf(line, sizeof(line), "(%d) %s", 472 sa->sa_family, any_ntoa(sa)); 473 break; 474 } 475 return (line); 476 } 477 478 char * 479 routename4(in_addr_t in) 480 { 481 char *cp = NULL; 482 struct in_addr ina; 483 struct hostent *hp; 484 485 if (!cp && !nflag) { 486 if ((hp = gethostbyaddr((char *)&in, 487 sizeof(in), AF_INET)) != NULL) { 488 if ((cp = strchr(hp->h_name, '.')) && 489 !strcmp(cp + 1, domain)) 490 *cp = '\0'; 491 cp = hp->h_name; 492 } 493 } 494 ina.s_addr = in; 495 strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line)); 496 497 return (line); 498 } 499 500 char * 501 routename6(struct sockaddr_in6 *sin6) 502 { 503 int niflags = 0; 504 505 if (nflag) 506 niflags |= NI_NUMERICHOST; 507 else 508 niflags |= NI_NOFQDN; 509 510 if (getnameinfo((struct sockaddr *)sin6, sizeof(*sin6), 511 line, sizeof(line), NULL, 0, niflags) != 0) 512 strncpy(line, "invalid", sizeof(line)); 513 514 return (line); 515 } 516 517 /* 518 * Return the name of the network whose address is given. 519 * The address is assumed to be that of a net or subnet, not a host. 520 */ 521 char * 522 netname4(in_addr_t in, in_addr_t mask) 523 { 524 int mbits; 525 526 in = ntohl(in); 527 mask = ntohl(mask); 528 mbits = mask ? 33 - ffs(mask) : 0; 529 if (in == INADDR_ANY && mask == INADDR_ANY) 530 strlcpy(line, "default", sizeof(line)); 531 #define C(x) ((x) & 0xff) 532 else if (mbits < 9) 533 snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits); 534 else if (mbits < 17) 535 snprintf(line, sizeof(line), "%u.%u/%d", 536 C(in >> 24) , C(in >> 16), mbits); 537 else if (mbits < 25) 538 snprintf(line, sizeof(line), "%u.%u.%u/%d", 539 C(in >> 24), C(in >> 16), C(in >> 8), mbits); 540 else 541 snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24), 542 C(in >> 16), C(in >> 8), C(in), mbits); 543 #undef C 544 return (line); 545 } 546 547 char * 548 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask) 549 { 550 struct sockaddr_in6 sin6; 551 u_char *p; 552 int masklen, final = 0, illegal = 0; 553 int i, lim, flag, error; 554 char hbuf[NI_MAXHOST]; 555 556 sin6 = *sa6; 557 558 flag = 0; 559 masklen = 0; 560 if (mask) { 561 lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr); 562 lim = lim < (int)sizeof(struct in6_addr) ? 563 lim : (int)sizeof(struct in6_addr); 564 for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) { 565 if (final && *p) { 566 illegal++; 567 sin6.sin6_addr.s6_addr[i++] = 0x00; 568 continue; 569 } 570 571 switch (*p & 0xff) { 572 case 0xff: 573 masklen += 8; 574 break; 575 case 0xfe: 576 masklen += 7; 577 final++; 578 break; 579 case 0xfc: 580 masklen += 6; 581 final++; 582 break; 583 case 0xf8: 584 masklen += 5; 585 final++; 586 break; 587 case 0xf0: 588 masklen += 4; 589 final++; 590 break; 591 case 0xe0: 592 masklen += 3; 593 final++; 594 break; 595 case 0xc0: 596 masklen += 2; 597 final++; 598 break; 599 case 0x80: 600 masklen += 1; 601 final++; 602 break; 603 case 0x00: 604 final++; 605 break; 606 default: 607 final++; 608 illegal++; 609 break; 610 } 611 612 if (!illegal) 613 sin6.sin6_addr.s6_addr[i++] &= *p; 614 else 615 sin6.sin6_addr.s6_addr[i++] = 0x00; 616 } 617 while (i < (int)sizeof(struct in6_addr)) 618 sin6.sin6_addr.s6_addr[i++] = 0x00; 619 } else 620 masklen = 128; 621 622 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) 623 return ("default"); 624 625 if (illegal) 626 warnx("illegal prefixlen"); 627 628 if (nflag) 629 flag |= NI_NUMERICHOST; 630 error = getnameinfo((struct sockaddr *)&sin6, sizeof(sin6), 631 hbuf, sizeof(hbuf), NULL, 0, flag); 632 if (error) 633 snprintf(hbuf, sizeof(hbuf), "invalid"); 634 635 snprintf(line, sizeof(line), "%s/%d", hbuf, masklen); 636 return (line); 637 } 638 639 /* 640 * Return the name of the network whose address is given. 641 * The address is assumed to be that of a net or subnet, not a host. 642 */ 643 char * 644 netname(struct sockaddr *sa, struct sockaddr *mask) 645 { 646 switch (sa->sa_family) { 647 case AF_INET: 648 return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr, 649 mask->sa_len == 0 ? 0 : 650 ((struct sockaddr_in *)mask)->sin_addr.s_addr); 651 case AF_INET6: 652 return netname6((struct sockaddr_in6 *)sa, 653 (struct sockaddr_in6 *)mask); 654 case AF_LINK: 655 return (link_print(sa)); 656 case AF_MPLS: 657 return (label_print(sa)); 658 default: 659 snprintf(line, sizeof(line), "af %d: %s", 660 sa->sa_family, any_ntoa(sa)); 661 break; 662 } 663 return (line); 664 } 665 666 static const char hexlist[] = "0123456789abcdef"; 667 668 char * 669 any_ntoa(const struct sockaddr *sa) 670 { 671 static char obuf[240]; 672 const char *in = sa->sa_data; 673 char *out = obuf; 674 int len = sa->sa_len - offsetof(struct sockaddr, sa_data); 675 676 *out++ = 'Q'; 677 do { 678 *out++ = hexlist[(*in >> 4) & 15]; 679 *out++ = hexlist[(*in++) & 15]; 680 *out++ = '.'; 681 } while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]); 682 out[-1] = '\0'; 683 return (obuf); 684 } 685 686 char * 687 link_print(struct sockaddr *sa) 688 { 689 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 690 u_char *lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen; 691 692 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 693 sdl->sdl_slen == 0) { 694 (void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index); 695 return (line); 696 } 697 switch (sdl->sdl_type) { 698 case IFT_ETHER: 699 case IFT_CARP: 700 return (ether_ntoa((struct ether_addr *)lla)); 701 default: 702 return (link_ntoa(sdl)); 703 } 704 } 705 706 char * 707 mpls_op(u_int32_t type) 708 { 709 switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) { 710 case MPLS_OP_LOCAL: 711 return ("LOCAL"); 712 case MPLS_OP_POP: 713 return ("POP"); 714 case MPLS_OP_SWAP: 715 return ("SWAP"); 716 case MPLS_OP_PUSH: 717 return ("PUSH"); 718 default: 719 return ("?"); 720 } 721 } 722 723 char * 724 label_print(struct sockaddr *sa) 725 { 726 struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa; 727 728 if (smpls) 729 (void)snprintf(line, sizeof(line), "%u", 730 ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET); 731 else 732 (void)snprintf(line, sizeof(line), "-"); 733 734 return (line); 735 } 736