1 /* $NetBSD: rtutil.c,v 1.7 2016/01/23 21:05:51 christos Exp $ */ 2 /* $OpenBSD: show.c,v 1.1 2006/05/27 19:16:37 claudio 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/param.h> 34 #include <sys/protosw.h> 35 #include <sys/socket.h> 36 #include <sys/sysctl.h> 37 38 #include <net/if.h> 39 #include <net/if_dl.h> 40 #include <net/if_types.h> 41 #include <net/pfvar.h> 42 #include <net/pfkeyv2.h> 43 #include <net/route.h> 44 #include <netinet/in.h> 45 #include <netinet/if_ether.h> 46 #include <netatalk/at.h> 47 #include <netmpls/mpls.h> 48 #include <arpa/inet.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <netdb.h> 53 #include <stdio.h> 54 #include <stddef.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #include "prog_ops.h" 60 #include "rtutil.h" 61 62 63 #define PLEN (LONG_BIT / 4 + 2) 64 #define PFKEYV2_CHUNK sizeof(u_int64_t) 65 static char *link_print(const struct sockaddr *); 66 67 /* 68 * Definitions for showing gateway flags. 69 */ 70 struct bits { 71 int b_mask; 72 char b_val; 73 }; 74 static const struct bits bits[] = { 75 { RTF_UP, 'U' }, 76 { RTF_GATEWAY, 'G' }, 77 { RTF_HOST, 'H' }, 78 { RTF_REJECT, 'R' }, 79 { RTF_BLACKHOLE, 'B' }, 80 { RTF_DYNAMIC, 'D' }, 81 { RTF_MODIFIED, 'M' }, 82 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 83 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */ 84 { RTF_CLONING, 'C' }, 85 { RTF_XRESOLVE, 'X' }, 86 { RTF_LLINFO, 'L' }, 87 { RTF_STATIC, 'S' }, 88 { RTF_PROTO1, '1' }, 89 { RTF_PROTO2, '2' }, 90 /* { RTF_PROTO3, '3' }, */ 91 { RTF_CLONED, 'c' }, 92 /* { RTF_JUMBO, 'J' }, */ 93 { RTF_ANNOUNCE, 'p' }, 94 { RTF_LOCAL, 'l'}, 95 { RTF_BROADCAST, 'b'}, 96 { 0, 0 } 97 }; 98 99 #ifndef SMALL 100 static void p_tag(const struct sockaddr *sa); 101 #endif 102 static void p_rtentry(struct rt_msghdr *, int, int); 103 104 /* 105 * Print routing tables. 106 */ 107 void 108 p_rttables(int paf, int flags, int pflags, int interesting) 109 { 110 struct rt_msghdr *rtm; 111 char *buf = NULL, *next, *lim = NULL; 112 size_t needed; 113 int mib[6]; 114 struct sockaddr *sa; 115 116 mib[0] = CTL_NET; 117 mib[1] = PF_ROUTE; 118 mib[2] = 0; 119 mib[3] = paf; 120 mib[4] = NET_RT_DUMP; 121 mib[5] = 0; 122 if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 123 err(1, "route-sysctl-estimate"); 124 if (needed > 0) { 125 if ((buf = malloc(needed)) == 0) 126 err(1, NULL); 127 if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 128 err(1, "sysctl of routing table"); 129 lim = buf + needed; 130 } 131 132 printf("Routing tables\n"); 133 134 if (buf) { 135 for (next = buf; next < lim; next += rtm->rtm_msglen) { 136 rtm = (struct rt_msghdr *)next; 137 sa = (struct sockaddr *)(rtm + 1); 138 if ((rtm->rtm_flags & pflags) != pflags) 139 continue; 140 if (paf != AF_UNSPEC && sa->sa_family != paf) 141 continue; 142 p_rtentry(rtm, flags, interesting); 143 } 144 free(buf); 145 buf = NULL; 146 } 147 148 if (paf != 0 && paf != PF_KEY) 149 return; 150 151 #if 0 /* XXX-elad */ 152 mib[0] = CTL_NET; 153 mib[1] = PF_KEY; 154 mib[2] = PF_KEY_V2; 155 mib[3] = NET_KEY_SPD_DUMP; 156 mib[4] = mib[5] = 0; 157 158 if (prog_sysctl(mib, 4, NULL, &needed, NULL, 0) == -1) { 159 if (errno == ENOPROTOOPT) 160 return; 161 err(1, "spd-sysctl-estimate"); 162 } 163 if (needed > 0) { 164 if ((buf = malloc(needed)) == 0) 165 err(1, NULL); 166 if (prog_sysctl(mib, 4, buf, &needed, NULL, 0) == -1) 167 err(1,"sysctl of spd"); 168 lim = buf + needed; 169 } 170 171 if (buf) { 172 printf("\nEncap:\n"); 173 174 for (next = buf; next < lim; next += msg->sadb_msg_len * 175 PFKEYV2_CHUNK) { 176 msg = (struct sadb_msg *)next; 177 if (msg->sadb_msg_len == 0) 178 break; 179 p_pfkentry(msg); 180 } 181 free(buf); 182 buf = NULL; 183 } 184 #endif /* 0 */ 185 } 186 187 /* 188 * column widths; each followed by one space 189 * width of destination/gateway column 190 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 = 34 191 * strlen("aaaa:bbbb:cccc:dddd:eeee:ffff:gggg:hhhh") == 39 192 */ 193 #ifndef INET6 194 #define WID_DST(af) 18 /* width of destination column */ 195 #define WID_GW(af) 18 /* width of gateway column */ 196 #else 197 #define WID_DST(af) ((af) == AF_INET6 ? ((flags & RT_NFLAG) ? 39 : 18) : 18) 198 #define WID_GW(af) ((af) == AF_INET6 ? ((flags & RT_NFLAG) ? 30 : 18) : 18) 199 #endif 200 201 /* 202 * Print header for routing table columns. 203 */ 204 void 205 p_rthdr(int paf, int flags) 206 { 207 #ifndef SMALL 208 if (flags & RT_AFLAG) 209 printf("%-*.*s ", PLEN, PLEN, "Address"); 210 if (paf == PF_KEY) { 211 printf("%-18s %-5s %-18s %-5s %-5s %-22s\n", 212 "Source", "Port", "Destination", 213 "Port", "Proto", "SA(Address/Proto/Type/Direction)"); 214 return; 215 } 216 if (flags & RT_TFLAG) { 217 printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %7.7s" 218 " %s\n", WID_DST(paf), WID_DST(paf), "Destination", 219 WID_GW(paf), WID_GW(paf), "Gateway", 220 "Flags", "Refs", "Use", "Mtu", "Tag", "Interface"); 221 return; 222 } 223 #endif 224 #ifndef SMALL 225 printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %s\n", 226 WID_DST(paf), WID_DST(paf), "Destination", 227 WID_GW(paf), WID_GW(paf), "Gateway", 228 "Flags", "Refs", "Use", "Mtu", "Interface"); 229 #else 230 printf("%-*.*s %-*.*s %-6.6s\n", 231 WID_DST(paf), WID_DST(paf), "Destination", 232 WID_GW(paf), WID_GW(paf), "Gateway", 233 "Flags"); 234 #endif 235 } 236 237 static void 238 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) 239 { 240 int i; 241 242 for (i = 0; i < RTAX_MAX; i++) { 243 if (addrs & (1 << i)) { 244 rti_info[i] = sa; 245 sa = (struct sockaddr *)((char *)(sa) + 246 RT_ROUNDUP(sa->sa_len)); 247 } else 248 rti_info[i] = NULL; 249 } 250 } 251 252 /* 253 * Print a routing table entry. 254 */ 255 static void 256 p_rtentry(struct rt_msghdr *rtm, int flags, int interesting) 257 { 258 static int old_af = -1; 259 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 260 struct sockaddr *mask, *rti_info[RTAX_MAX]; 261 #ifndef SMALL 262 char ifbuf[IF_NAMESIZE]; 263 #endif 264 265 if ((flags & RT_LFLAG) && (rtm->rtm_flags & RTF_LLINFO)) 266 return; 267 268 if (old_af != sa->sa_family) { 269 old_af = sa->sa_family; 270 p_family(sa->sa_family); 271 p_rthdr(sa->sa_family, flags); 272 } 273 get_rtaddrs(rtm->rtm_addrs, sa, rti_info); 274 275 mask = rti_info[RTAX_NETMASK]; 276 if ((sa = rti_info[RTAX_DST]) == NULL) 277 return; 278 279 p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family), flags); 280 p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST, 281 WID_GW(sa->sa_family), flags); 282 p_flags(rtm->rtm_flags & interesting); 283 #if 0 /* XXX-elad */ 284 printf("%6d %8"PRId64" ", (int)rtm->rtm_rmx.rmx_refcnt, 285 rtm->rtm_rmx.rmx_pksent); 286 #else 287 printf("%6s %8s ", "-", "-"); 288 #endif 289 #ifndef SMALL 290 if (rtm->rtm_rmx.rmx_mtu) 291 printf("%6"PRId64, rtm->rtm_rmx.rmx_mtu); 292 else 293 printf("%6s", "-"); 294 putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' '); 295 if (flags & RT_TFLAG) 296 p_tag(rti_info[RTAX_TAG]); 297 printf(" %.16s", if_indextoname(rtm->rtm_index, ifbuf)); 298 putchar('\n'); 299 if (flags & RT_VFLAG) 300 p_rtrmx(&rtm->rtm_rmx); 301 #endif 302 } 303 304 /* 305 * Print address family header before a section of the routing table. 306 */ 307 void 308 p_family(int paf) 309 { 310 const char *afname; 311 312 switch (paf) { 313 case AF_INET: 314 afname = "Internet"; 315 break; 316 #ifdef INET6 317 case AF_INET6: 318 afname = "Internet6"; 319 break; 320 #endif 321 case PF_KEY: 322 afname = "Encap"; 323 break; 324 case AF_APPLETALK: 325 afname = "AppleTalk"; 326 break; 327 #ifndef SMALL 328 case AF_MPLS: 329 afname = "MPLS"; 330 break; 331 #endif 332 default: 333 afname = NULL; 334 break; 335 } 336 if (afname) 337 printf("\n%s:\n", afname); 338 else 339 printf("\nProtocol Family %d:\n", paf); 340 } 341 342 void 343 p_sockaddr(const struct sockaddr *sa, const struct sockaddr *mask, int rflags, 344 int width, int flags) 345 { 346 char *cp; 347 348 switch (sa->sa_family) { 349 #ifdef INET6 350 case AF_INET6: 351 { 352 struct sockaddr_in6 sa6 = *(const struct sockaddr_in6 *)sa; 353 354 inet6_getscopeid(&sa6, INET6_IS_ADDR_LINKLOCAL| 355 INET6_IS_ADDR_MC_LINKLOCAL); 356 if (rflags & RTF_HOST) 357 cp = routename((const struct sockaddr *)&sa6, flags); 358 else 359 cp = netname((const struct sockaddr *)&sa6, mask, flags); 360 break; 361 } 362 #endif 363 default: 364 if ((rflags & RTF_HOST) || mask == NULL) 365 cp = routename(sa, flags); 366 else 367 cp = netname(sa, mask, flags); 368 break; 369 } 370 if (width < 0) 371 printf("%s", cp); 372 else { 373 if (flags & RT_NFLAG) 374 printf("%-*s ", width, cp); 375 else 376 printf("%-*.*s ", width, width, cp); 377 } 378 } 379 380 void 381 p_flags(int f) 382 { 383 char name[33], *flags; 384 const struct bits *p = bits; 385 386 for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++) 387 if (p->b_mask & f) 388 *flags++ = p->b_val; 389 *flags = '\0'; 390 printf("%-6.6s ", name); 391 } 392 393 #ifndef SMALL 394 void 395 p_rtrmx(const struct rt_metrics *rmx) 396 { 397 printf("\texpire %10"PRId64"%c recvpipe %10"PRIu64"%c " 398 "sendpipe %10"PRIu64"%c\n", 399 (int64_t)rmx->rmx_expire, 400 (rmx->rmx_locks & RTV_EXPIRE) ? 'L' : ' ', rmx->rmx_recvpipe, 401 (rmx->rmx_locks & RTV_RPIPE) ? 'L' : ' ', rmx->rmx_sendpipe, 402 (rmx->rmx_locks & RTV_SPIPE) ? 'L' : ' '); 403 printf("\tssthresh %10"PRIu64"%c rtt %10"PRIu64"%c " 404 "rttvar %10"PRIu64"%c\n", rmx->rmx_ssthresh, 405 (rmx->rmx_locks & RTV_SSTHRESH) ? 'L' : ' ', 406 rmx->rmx_rtt, (rmx->rmx_locks & RTV_RTT) ? 'L' : ' ', 407 rmx->rmx_rttvar, (rmx->rmx_locks & RTV_RTTVAR) ? 'L' : ' '); 408 printf("\thopcount %10"PRIu64"%c\n", 409 rmx->rmx_hopcount, (rmx->rmx_locks & RTV_HOPCOUNT) ? 'L' : ' '); 410 } 411 412 static void 413 p_tag(const struct sockaddr *sa) 414 { 415 char *line; 416 417 if (sa == NULL || sa->sa_family != AF_MPLS) { 418 printf("%7s", "-"); 419 return; 420 } 421 line = mpls_ntoa(sa); 422 if (strlen(line) < 7) 423 printf("%7s", line); 424 else 425 printf("%s", line); 426 } 427 #endif 428 429 static char line[MAXHOSTNAMELEN]; 430 static char domain[MAXHOSTNAMELEN]; 431 432 char * 433 routename(const struct sockaddr *sa, int flags) 434 { 435 char *cp = NULL; 436 static int first = 1; 437 438 if (first) { 439 first = 0; 440 if (gethostname(domain, sizeof(domain)) == 0 && 441 (cp = strchr(domain, '.'))) 442 (void)strlcpy(domain, cp + 1, sizeof(domain)); 443 else 444 domain[0] = '\0'; 445 cp = NULL; 446 } 447 448 if (sa->sa_len == 0) { 449 (void)strlcpy(line, "default", sizeof(line)); 450 return (line); 451 } 452 453 switch (sa->sa_family) { 454 case AF_INET: 455 return routename4( 456 ((const struct sockaddr_in *)sa)->sin_addr.s_addr, 457 flags); 458 #ifdef INET6 459 case AF_INET6: 460 { 461 struct sockaddr_in6 sin6; 462 463 memset(&sin6, 0, sizeof(sin6)); 464 memcpy(&sin6, sa, sa->sa_len); 465 sin6.sin6_len = sizeof(struct sockaddr_in6); 466 sin6.sin6_family = AF_INET6; 467 if (sa->sa_len == sizeof(struct sockaddr_in6)) 468 inet6_getscopeid(&sin6, INET6_IS_ADDR_LINKLOCAL| 469 INET6_IS_ADDR_MC_LINKLOCAL); 470 return routename6(&sin6, flags); 471 } 472 #endif 473 case AF_LINK: 474 return link_print(sa); 475 476 #ifndef SMALL 477 case AF_MPLS: 478 return mpls_ntoa(sa); 479 480 case AF_APPLETALK: 481 (void)snprintf(line, sizeof(line), "atalk %d.%d", 482 ((const struct sockaddr_at *)sa)->sat_addr.s_net, 483 ((const struct sockaddr_at *)sa)->sat_addr.s_node); 484 break; 485 #endif 486 487 #if 0 /* XXX-elad */ 488 case AF_UNSPEC: 489 if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) { 490 static char name[RTLABEL_LEN]; 491 struct sockaddr_rtlabel *sr; 492 493 sr = (struct sockaddr_rtlabel *)sa; 494 strlcpy(name, sr->sr_label, sizeof(name)); 495 return (name); 496 } 497 /* FALLTHROUGH */ 498 #endif 499 default: 500 (void)snprintf(line, sizeof(line), "(%d) %s", 501 sa->sa_family, any_ntoa(sa)); 502 break; 503 } 504 return (line); 505 } 506 507 char * 508 routename4(in_addr_t in, int flags) 509 { 510 const char *cp = NULL; 511 struct in_addr ina; 512 struct hostent *hp; 513 514 if (in == INADDR_ANY) 515 cp = "default"; 516 if (!cp && (flags & RT_NFLAG) == 0) { 517 if ((hp = gethostbyaddr((char *)&in, 518 sizeof(in), AF_INET)) != NULL) { 519 char *p; 520 if ((p = strchr(hp->h_name, '.')) && 521 !strcmp(p + 1, domain)) 522 *p = '\0'; 523 cp = hp->h_name; 524 } 525 } 526 ina.s_addr = in; 527 strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line)); 528 529 return (line); 530 } 531 532 #ifdef INET6 533 char * 534 routename6(const struct sockaddr_in6 *sin6, int flags) 535 { 536 int niflags = 0; 537 538 if ((flags & RT_NFLAG)) 539 niflags |= NI_NUMERICHOST; 540 else 541 niflags |= NI_NOFQDN; 542 543 if (getnameinfo((const struct sockaddr *)sin6, sin6->sin6_len, 544 line, sizeof(line), NULL, 0, niflags) != 0) 545 strncpy(line, "invalid", sizeof(line)); 546 547 return (line); 548 } 549 #endif 550 551 /* 552 * Return the name of the network whose address is given. 553 * The address is assumed to be that of a net or subnet, not a host. 554 */ 555 char * 556 netname4(const struct sockaddr_in* sa4, const struct sockaddr_in *mask, int flags) 557 { 558 const char *cp = NULL; 559 struct netent *np = NULL; 560 int mbits; 561 in_addr_t in = sa4->sin_addr.s_addr; 562 563 if (mask) { 564 in_addr_t m = mask->sin_addr.s_addr ; 565 m = ntohl(m); 566 mbits = m ? 33 - ffs(m) : 0; 567 } else 568 mbits = 0; 569 570 in = ntohl(in); 571 if (in == INADDR_ANY && !mbits) 572 cp = "default"; 573 else if (!(flags & RT_NFLAG) && in != INADDR_ANY) { 574 if ((np = getnetbyaddr(in, AF_INET)) != NULL) 575 cp = np->n_name; 576 } 577 if (cp) 578 strlcpy(line, cp, sizeof(line)); 579 #define C(x) ((x) & 0xff) 580 else if (mbits < 9) 581 snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits); 582 else if (mbits < 17) 583 snprintf(line, sizeof(line), "%u.%u/%d", 584 C(in >> 24) , C(in >> 16), mbits); 585 else if (mbits < 25) 586 snprintf(line, sizeof(line), "%u.%u.%u/%d", 587 C(in >> 24), C(in >> 16), C(in >> 8), mbits); 588 else 589 snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24), 590 C(in >> 16), C(in >> 8), C(in), mbits); 591 #undef C 592 return line; 593 } 594 595 #ifdef INET6 596 char * 597 netname6(const struct sockaddr_in6 *sa6, const struct sockaddr_in6 *mask, int flags) 598 { 599 struct sockaddr_in6 sin6; 600 const u_char *p; 601 int masklen, final = 0, illegal = 0; 602 int i, lim, flag, error; 603 char hbuf[NI_MAXHOST]; 604 605 sin6 = *sa6; 606 607 flag = 0; 608 masklen = 0; 609 if (mask) { 610 lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr); 611 if (lim < 0) 612 lim = 0; 613 else if (lim > (int)sizeof(struct in6_addr)) 614 lim = sizeof(struct in6_addr); 615 for (p = (const u_char *)&mask->sin6_addr, i = 0; i < lim; p++) { 616 if (final && *p) { 617 illegal++; 618 sin6.sin6_addr.s6_addr[i++] = 0x00; 619 continue; 620 } 621 622 switch (*p & 0xff) { 623 case 0xff: 624 masklen += 8; 625 break; 626 case 0xfe: 627 masklen += 7; 628 final++; 629 break; 630 case 0xfc: 631 masklen += 6; 632 final++; 633 break; 634 case 0xf8: 635 masklen += 5; 636 final++; 637 break; 638 case 0xf0: 639 masklen += 4; 640 final++; 641 break; 642 case 0xe0: 643 masklen += 3; 644 final++; 645 break; 646 case 0xc0: 647 masklen += 2; 648 final++; 649 break; 650 case 0x80: 651 masklen += 1; 652 final++; 653 break; 654 case 0x00: 655 final++; 656 break; 657 default: 658 final++; 659 illegal++; 660 break; 661 } 662 663 if (!illegal) 664 sin6.sin6_addr.s6_addr[i++] &= *p; 665 else 666 sin6.sin6_addr.s6_addr[i++] = 0x00; 667 } 668 while (i < (int)sizeof(struct in6_addr)) 669 sin6.sin6_addr.s6_addr[i++] = 0x00; 670 } else 671 masklen = 128; 672 673 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 674 snprintf(line, sizeof(line), "default"); 675 return (line); 676 } 677 678 if (illegal) 679 warnx("illegal prefixlen"); 680 681 if (flags & RT_NFLAG) 682 flag |= NI_NUMERICHOST; 683 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 684 hbuf, sizeof(hbuf), NULL, 0, flag); 685 if (error) 686 snprintf(hbuf, sizeof(hbuf), "invalid"); 687 688 snprintf(line, sizeof(line), "%s/%d", hbuf, masklen); 689 return (line); 690 } 691 #endif 692 693 /* 694 * Return the name of the network whose address is given. 695 * The address is assumed to be that of a net or subnet, not a host. 696 */ 697 char * 698 netname(const struct sockaddr *sa, const struct sockaddr *mask, int flags) 699 { 700 switch (sa->sa_family) { 701 702 case AF_INET: 703 return netname4((const struct sockaddr_in *)sa, 704 (const struct sockaddr_in *)mask, flags); 705 #ifdef INET6 706 case AF_INET6: 707 return netname6((const struct sockaddr_in6 *)sa, 708 (const struct sockaddr_in6 *)mask, flags); 709 #endif 710 case AF_LINK: 711 return link_print(sa); 712 default: 713 snprintf(line, sizeof(line), "af %d: %s", 714 sa->sa_family, any_ntoa(sa)); 715 break; 716 } 717 return (line); 718 } 719 720 static const char hexlist[] = "0123456789abcdef"; 721 722 char * 723 any_ntoa(const struct sockaddr *sa) 724 { 725 static char obuf[240]; 726 const char *in = sa->sa_data; 727 char *out = obuf; 728 int len = sa->sa_len - offsetof(struct sockaddr, sa_data); 729 730 *out++ = 'Q'; 731 do { 732 *out++ = hexlist[(*in >> 4) & 15]; 733 *out++ = hexlist[(*in++) & 15]; 734 *out++ = '.'; 735 } while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]); 736 out[-1] = '\0'; 737 return (obuf); 738 } 739 740 static char * 741 link_print(const struct sockaddr *sa) 742 { 743 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)sa; 744 const u_char *lla = (const u_char *)sdl->sdl_data + sdl->sdl_nlen; 745 746 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 747 sdl->sdl_slen == 0) { 748 (void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index); 749 return (line); 750 } 751 switch (sdl->sdl_type) { 752 case IFT_ETHER: 753 case IFT_CARP: 754 return ether_ntoa((const struct ether_addr *)lla); 755 default: 756 return link_ntoa(sdl); 757 } 758 } 759 760 #ifndef SMALL 761 char * 762 mpls_ntoa(const struct sockaddr *sa) 763 { 764 static char obuf[16]; 765 size_t olen; 766 const union mpls_shim *pms; 767 union mpls_shim ms; 768 int psize = sizeof(struct sockaddr_mpls); 769 770 pms = &((const struct sockaddr_mpls*)sa)->smpls_addr; 771 ms.s_addr = ntohl(pms->s_addr); 772 773 snprintf(obuf, sizeof(obuf), "%u", ms.shim.label); 774 775 while(psize < sa->sa_len) { 776 pms++; 777 ms.s_addr = ntohl(pms->s_addr); 778 olen = strlen(obuf); 779 snprintf(obuf + olen, sizeof(obuf) - olen, ",%u", 780 ms.shim.label); 781 psize+=sizeof(ms); 782 } 783 return obuf; 784 } 785 #endif 786 787 void 788 p_addr(const struct sockaddr *sa, const struct sockaddr *mask, int rflags, int flags) 789 { 790 p_sockaddr(sa, mask, rflags, WID_DST(sa->sa_family), flags); 791 } 792 793 void 794 p_gwaddr(const struct sockaddr *sa, int gwaf, int flags) 795 { 796 p_sockaddr(sa, 0, RTF_HOST, WID_GW(gwaf), flags); 797 } 798