1 /* 2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * Internet, ethernet, port, and protocol string to address 22 * and address to string conversion routines 23 * 24 * $FreeBSD$ 25 */ 26 #ifndef lint 27 static const char rcsid[] _U_ = 28 "@(#) $Header: /tcpdump/master/tcpdump/addrtoname.c,v 1.119 2007-08-08 14:06:34 hannes Exp $ (LBL)"; 29 #endif 30 31 #ifdef HAVE_CONFIG_H 32 #include "config.h" 33 #endif 34 35 #ifdef __FreeBSD__ 36 #ifdef HAVE_LIBCAPSICUM 37 #include <libcapsicum.h> 38 #include <libcapsicum_dns.h> 39 #endif /* HAVE_LIBCAPSICUM */ 40 #endif 41 #include <tcpdump-stdinc.h> 42 43 #ifdef USE_ETHER_NTOHOST 44 #ifdef HAVE_NETINET_IF_ETHER_H 45 struct mbuf; /* Squelch compiler warnings on some platforms for */ 46 struct rtentry; /* declarations in <net/if.h> */ 47 #include <net/if.h> /* for "struct ifnet" in "struct arpcom" on Solaris */ 48 #include <netinet/if_ether.h> 49 #endif /* HAVE_NETINET_IF_ETHER_H */ 50 #ifdef NETINET_ETHER_H_DECLARES_ETHER_NTOHOST 51 #include <netinet/ether.h> 52 #endif /* NETINET_ETHER_H_DECLARES_ETHER_NTOHOST */ 53 54 #if !defined(HAVE_DECL_ETHER_NTOHOST) || !HAVE_DECL_ETHER_NTOHOST 55 #ifndef HAVE_STRUCT_ETHER_ADDR 56 struct ether_addr { 57 unsigned char ether_addr_octet[6]; 58 }; 59 #endif 60 extern int ether_ntohost(char *, const struct ether_addr *); 61 #endif 62 63 #endif /* USE_ETHER_NTOHOST */ 64 65 #include <pcap.h> 66 #include <pcap-namedb.h> 67 #include <signal.h> 68 #include <stdio.h> 69 #include <string.h> 70 #include <stdlib.h> 71 72 #include "interface.h" 73 #include "addrtoname.h" 74 #include "llc.h" 75 #include "setsignal.h" 76 #include "extract.h" 77 #include "oui.h" 78 79 #ifndef ETHER_ADDR_LEN 80 #define ETHER_ADDR_LEN 6 81 #endif 82 83 /* 84 * hash tables for whatever-to-name translations 85 * 86 * XXX there has to be error checks against strdup(3) failure 87 */ 88 89 #define HASHNAMESIZE 4096 90 91 struct hnamemem { 92 u_int32_t addr; 93 const char *name; 94 struct hnamemem *nxt; 95 }; 96 97 static struct hnamemem hnametable[HASHNAMESIZE]; 98 static struct hnamemem tporttable[HASHNAMESIZE]; 99 static struct hnamemem uporttable[HASHNAMESIZE]; 100 static struct hnamemem eprototable[HASHNAMESIZE]; 101 static struct hnamemem dnaddrtable[HASHNAMESIZE]; 102 static struct hnamemem ipxsaptable[HASHNAMESIZE]; 103 104 #if defined(INET6) && defined(WIN32) 105 /* 106 * fake gethostbyaddr for Win2k/XP 107 * gethostbyaddr() returns incorrect value when AF_INET6 is passed 108 * to 3rd argument. 109 * 110 * h_name in struct hostent is only valid. 111 */ 112 static struct hostent * 113 win32_gethostbyaddr(const char *addr, int len, int type) 114 { 115 static struct hostent host; 116 static char hostbuf[NI_MAXHOST]; 117 char hname[NI_MAXHOST]; 118 struct sockaddr_in6 addr6; 119 120 host.h_name = hostbuf; 121 switch (type) { 122 case AF_INET: 123 return gethostbyaddr(addr, len, type); 124 break; 125 case AF_INET6: 126 memset(&addr6, 0, sizeof(addr6)); 127 addr6.sin6_family = AF_INET6; 128 memcpy(&addr6.sin6_addr, addr, len); 129 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6), 130 hname, sizeof(hname), NULL, 0, 0)) { 131 return NULL; 132 } else { 133 strcpy(host.h_name, hname); 134 return &host; 135 } 136 break; 137 default: 138 return NULL; 139 } 140 } 141 #define gethostbyaddr win32_gethostbyaddr 142 #endif /* INET6 & WIN32 */ 143 144 #ifdef INET6 145 struct h6namemem { 146 struct in6_addr addr; 147 char *name; 148 struct h6namemem *nxt; 149 }; 150 151 static struct h6namemem h6nametable[HASHNAMESIZE]; 152 #endif /* INET6 */ 153 154 struct enamemem { 155 u_short e_addr0; 156 u_short e_addr1; 157 u_short e_addr2; 158 const char *e_name; 159 u_char *e_nsap; /* used only for nsaptable[] */ 160 #define e_bs e_nsap /* for bytestringtable */ 161 struct enamemem *e_nxt; 162 }; 163 164 static struct enamemem enametable[HASHNAMESIZE]; 165 static struct enamemem nsaptable[HASHNAMESIZE]; 166 static struct enamemem bytestringtable[HASHNAMESIZE]; 167 168 struct protoidmem { 169 u_int32_t p_oui; 170 u_short p_proto; 171 const char *p_name; 172 struct protoidmem *p_nxt; 173 }; 174 175 static struct protoidmem protoidtable[HASHNAMESIZE]; 176 177 /* 178 * A faster replacement for inet_ntoa(). 179 */ 180 const char * 181 intoa(u_int32_t addr) 182 { 183 register char *cp; 184 register u_int byte; 185 register int n; 186 static char buf[sizeof(".xxx.xxx.xxx.xxx")]; 187 188 NTOHL(addr); 189 cp = buf + sizeof(buf); 190 *--cp = '\0'; 191 192 n = 4; 193 do { 194 byte = addr & 0xff; 195 *--cp = byte % 10 + '0'; 196 byte /= 10; 197 if (byte > 0) { 198 *--cp = byte % 10 + '0'; 199 byte /= 10; 200 if (byte > 0) 201 *--cp = byte + '0'; 202 } 203 *--cp = '.'; 204 addr >>= 8; 205 } while (--n > 0); 206 207 return cp + 1; 208 } 209 210 static u_int32_t f_netmask; 211 static u_int32_t f_localnet; 212 #ifdef HAVE_LIBCAPSICUM 213 extern cap_channel_t *capdns; 214 #endif 215 216 /* 217 * Return a name for the IP address pointed to by ap. This address 218 * is assumed to be in network byte order. 219 * 220 * NOTE: ap is *NOT* necessarily part of the packet data (not even if 221 * this is being called with the "ipaddr_string()" macro), so you 222 * *CANNOT* use the TCHECK{2}/TTEST{2} macros on it. Furthermore, 223 * even in cases where it *is* part of the packet data, the caller 224 * would still have to check for a null return value, even if it's 225 * just printing the return value with "%s" - not all versions of 226 * printf print "(null)" with "%s" and a null pointer, some of them 227 * don't check for a null pointer and crash in that case. 228 * 229 * The callers of this routine should, before handing this routine 230 * a pointer to packet data, be sure that the data is present in 231 * the packet buffer. They should probably do those checks anyway, 232 * as other data at that layer might not be IP addresses, and it 233 * also needs to check whether they're present in the packet buffer. 234 */ 235 const char * 236 getname(const u_char *ap) 237 { 238 register struct hostent *hp; 239 u_int32_t addr; 240 static struct hnamemem *p; /* static for longjmp() */ 241 242 memcpy(&addr, ap, sizeof(addr)); 243 p = &hnametable[addr & (HASHNAMESIZE-1)]; 244 for (; p->nxt; p = p->nxt) { 245 if (p->addr == addr) 246 return (p->name); 247 } 248 p->addr = addr; 249 p->nxt = newhnamemem(); 250 251 /* 252 * Print names unless: 253 * (1) -n was given. 254 * (2) Address is foreign and -f was given. (If -f was not 255 * given, f_netmask and f_localnet are 0 and the test 256 * evaluates to true) 257 */ 258 if (!nflag && 259 (addr & f_netmask) == f_localnet) { 260 #ifdef HAVE_LIBCAPSICUM 261 if (capdns != NULL) { 262 hp = cap_gethostbyaddr(capdns, (char *)&addr, 4, 263 AF_INET); 264 } else 265 #endif 266 hp = gethostbyaddr((char *)&addr, 4, AF_INET); 267 if (hp) { 268 char *dotp; 269 270 p->name = strdup(hp->h_name); 271 if (Nflag) { 272 /* Remove domain qualifications */ 273 dotp = strchr(p->name, '.'); 274 if (dotp) 275 *dotp = '\0'; 276 } 277 return (p->name); 278 } 279 } 280 p->name = strdup(intoa(addr)); 281 return (p->name); 282 } 283 284 #ifdef INET6 285 /* 286 * Return a name for the IP6 address pointed to by ap. This address 287 * is assumed to be in network byte order. 288 */ 289 const char * 290 getname6(const u_char *ap) 291 { 292 register struct hostent *hp; 293 struct in6_addr addr; 294 static struct h6namemem *p; /* static for longjmp() */ 295 register const char *cp; 296 char ntop_buf[INET6_ADDRSTRLEN]; 297 298 memcpy(&addr, ap, sizeof(addr)); 299 p = &h6nametable[*(u_int16_t *)&addr.s6_addr[14] & (HASHNAMESIZE-1)]; 300 for (; p->nxt; p = p->nxt) { 301 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0) 302 return (p->name); 303 } 304 p->addr = addr; 305 p->nxt = newh6namemem(); 306 307 /* 308 * Do not print names if -n was given. 309 */ 310 if (!nflag) { 311 #ifdef HAVE_LIBCAPSICUM 312 if (capdns != NULL) { 313 hp = cap_gethostbyaddr(capdns, (char *)&addr, 314 sizeof(addr), AF_INET6); 315 } else 316 #endif 317 hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6); 318 if (hp) { 319 char *dotp; 320 321 p->name = strdup(hp->h_name); 322 if (Nflag) { 323 /* Remove domain qualifications */ 324 dotp = strchr(p->name, '.'); 325 if (dotp) 326 *dotp = '\0'; 327 } 328 return (p->name); 329 } 330 } 331 cp = inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf)); 332 p->name = strdup(cp); 333 return (p->name); 334 } 335 #endif /* INET6 */ 336 337 static const char hex[] = "0123456789abcdef"; 338 339 340 /* Find the hash node that corresponds the ether address 'ep' */ 341 342 static inline struct enamemem * 343 lookup_emem(const u_char *ep) 344 { 345 register u_int i, j, k; 346 struct enamemem *tp; 347 348 k = (ep[0] << 8) | ep[1]; 349 j = (ep[2] << 8) | ep[3]; 350 i = (ep[4] << 8) | ep[5]; 351 352 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)]; 353 while (tp->e_nxt) 354 if (tp->e_addr0 == i && 355 tp->e_addr1 == j && 356 tp->e_addr2 == k) 357 return tp; 358 else 359 tp = tp->e_nxt; 360 tp->e_addr0 = i; 361 tp->e_addr1 = j; 362 tp->e_addr2 = k; 363 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 364 if (tp->e_nxt == NULL) 365 error("lookup_emem: calloc"); 366 367 return tp; 368 } 369 370 /* 371 * Find the hash node that corresponds to the bytestring 'bs' 372 * with length 'nlen' 373 */ 374 375 static inline struct enamemem * 376 lookup_bytestring(register const u_char *bs, const unsigned int nlen) 377 { 378 struct enamemem *tp; 379 register u_int i, j, k; 380 381 if (nlen >= 6) { 382 k = (bs[0] << 8) | bs[1]; 383 j = (bs[2] << 8) | bs[3]; 384 i = (bs[4] << 8) | bs[5]; 385 } else if (nlen >= 4) { 386 k = (bs[0] << 8) | bs[1]; 387 j = (bs[2] << 8) | bs[3]; 388 i = 0; 389 } else 390 i = j = k = 0; 391 392 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)]; 393 while (tp->e_nxt) 394 if (tp->e_addr0 == i && 395 tp->e_addr1 == j && 396 tp->e_addr2 == k && 397 memcmp((const char *)bs, (const char *)(tp->e_bs), nlen) == 0) 398 return tp; 399 else 400 tp = tp->e_nxt; 401 402 tp->e_addr0 = i; 403 tp->e_addr1 = j; 404 tp->e_addr2 = k; 405 406 tp->e_bs = (u_char *) calloc(1, nlen + 1); 407 if (tp->e_bs == NULL) 408 error("lookup_bytestring: calloc"); 409 410 memcpy(tp->e_bs, bs, nlen); 411 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 412 if (tp->e_nxt == NULL) 413 error("lookup_bytestring: calloc"); 414 415 return tp; 416 } 417 418 /* Find the hash node that corresponds the NSAP 'nsap' */ 419 420 static inline struct enamemem * 421 lookup_nsap(register const u_char *nsap) 422 { 423 register u_int i, j, k; 424 unsigned int nlen = *nsap; 425 struct enamemem *tp; 426 const u_char *ensap = nsap + nlen - 6; 427 428 if (nlen > 6) { 429 k = (ensap[0] << 8) | ensap[1]; 430 j = (ensap[2] << 8) | ensap[3]; 431 i = (ensap[4] << 8) | ensap[5]; 432 } 433 else 434 i = j = k = 0; 435 436 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)]; 437 while (tp->e_nxt) 438 if (tp->e_addr0 == i && 439 tp->e_addr1 == j && 440 tp->e_addr2 == k && 441 tp->e_nsap[0] == nlen && 442 memcmp((const char *)&(nsap[1]), 443 (char *)&(tp->e_nsap[1]), nlen) == 0) 444 return tp; 445 else 446 tp = tp->e_nxt; 447 tp->e_addr0 = i; 448 tp->e_addr1 = j; 449 tp->e_addr2 = k; 450 tp->e_nsap = (u_char *)malloc(nlen + 1); 451 if (tp->e_nsap == NULL) 452 error("lookup_nsap: malloc"); 453 memcpy((char *)tp->e_nsap, (const char *)nsap, nlen + 1); 454 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 455 if (tp->e_nxt == NULL) 456 error("lookup_nsap: calloc"); 457 458 return tp; 459 } 460 461 /* Find the hash node that corresponds the protoid 'pi'. */ 462 463 static inline struct protoidmem * 464 lookup_protoid(const u_char *pi) 465 { 466 register u_int i, j; 467 struct protoidmem *tp; 468 469 /* 5 octets won't be aligned */ 470 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2]; 471 j = (pi[3] << 8) + pi[4]; 472 /* XXX should be endian-insensitive, but do big-endian testing XXX */ 473 474 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)]; 475 while (tp->p_nxt) 476 if (tp->p_oui == i && tp->p_proto == j) 477 return tp; 478 else 479 tp = tp->p_nxt; 480 tp->p_oui = i; 481 tp->p_proto = j; 482 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp)); 483 if (tp->p_nxt == NULL) 484 error("lookup_protoid: calloc"); 485 486 return tp; 487 } 488 489 const char * 490 etheraddr_string(register const u_char *ep) 491 { 492 register int i; 493 register char *cp; 494 register struct enamemem *tp; 495 int oui; 496 char buf[BUFSIZE]; 497 498 tp = lookup_emem(ep); 499 if (tp->e_name) 500 return (tp->e_name); 501 #ifdef USE_ETHER_NTOHOST 502 if (!nflag) { 503 char buf2[BUFSIZE]; 504 505 /* 506 * We don't cast it to "const struct ether_addr *" 507 * because some systems fail to declare the second 508 * argument as a "const" pointer, even though they 509 * don't modify what it points to. 510 */ 511 if (ether_ntohost(buf2, (struct ether_addr *)ep) == 0) { 512 tp->e_name = strdup(buf2); 513 return (tp->e_name); 514 } 515 } 516 #endif 517 cp = buf; 518 oui = EXTRACT_24BITS(ep); 519 *cp++ = hex[*ep >> 4 ]; 520 *cp++ = hex[*ep++ & 0xf]; 521 for (i = 5; --i >= 0;) { 522 *cp++ = ':'; 523 *cp++ = hex[*ep >> 4 ]; 524 *cp++ = hex[*ep++ & 0xf]; 525 } 526 527 if (!nflag) { 528 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)", 529 tok2str(oui_values, "Unknown", oui)); 530 } else 531 *cp = '\0'; 532 tp->e_name = strdup(buf); 533 return (tp->e_name); 534 } 535 536 const char * 537 le64addr_string(const u_char *ep) 538 { 539 const unsigned int len = 8; 540 register u_int i; 541 register char *cp; 542 register struct enamemem *tp; 543 char buf[BUFSIZE]; 544 545 tp = lookup_bytestring(ep, len); 546 if (tp->e_name) 547 return (tp->e_name); 548 549 cp = buf; 550 for (i = len; i > 0 ; --i) { 551 *cp++ = hex[*(ep + i - 1) >> 4]; 552 *cp++ = hex[*(ep + i - 1) & 0xf]; 553 *cp++ = ':'; 554 } 555 cp --; 556 557 *cp = '\0'; 558 559 tp->e_name = strdup(buf); 560 561 return (tp->e_name); 562 } 563 564 const char * 565 linkaddr_string(const u_char *ep, const unsigned int type, const unsigned int len) 566 { 567 register u_int i; 568 register char *cp; 569 register struct enamemem *tp; 570 571 if (len == 0) 572 return ("<empty>"); 573 574 if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN) 575 return (etheraddr_string(ep)); 576 577 if (type == LINKADDR_FRELAY) 578 return (q922_string(ep)); 579 580 tp = lookup_bytestring(ep, len); 581 if (tp->e_name) 582 return (tp->e_name); 583 584 tp->e_name = cp = (char *)malloc(len*3); 585 if (tp->e_name == NULL) 586 error("linkaddr_string: malloc"); 587 *cp++ = hex[*ep >> 4]; 588 *cp++ = hex[*ep++ & 0xf]; 589 for (i = len-1; i > 0 ; --i) { 590 *cp++ = ':'; 591 *cp++ = hex[*ep >> 4]; 592 *cp++ = hex[*ep++ & 0xf]; 593 } 594 *cp = '\0'; 595 return (tp->e_name); 596 } 597 598 const char * 599 etherproto_string(u_short port) 600 { 601 register char *cp; 602 register struct hnamemem *tp; 603 register u_int32_t i = port; 604 char buf[sizeof("0000")]; 605 606 for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 607 if (tp->addr == i) 608 return (tp->name); 609 610 tp->addr = i; 611 tp->nxt = newhnamemem(); 612 613 cp = buf; 614 NTOHS(port); 615 *cp++ = hex[port >> 12 & 0xf]; 616 *cp++ = hex[port >> 8 & 0xf]; 617 *cp++ = hex[port >> 4 & 0xf]; 618 *cp++ = hex[port & 0xf]; 619 *cp++ = '\0'; 620 tp->name = strdup(buf); 621 return (tp->name); 622 } 623 624 const char * 625 protoid_string(register const u_char *pi) 626 { 627 register u_int i, j; 628 register char *cp; 629 register struct protoidmem *tp; 630 char buf[sizeof("00:00:00:00:00")]; 631 632 tp = lookup_protoid(pi); 633 if (tp->p_name) 634 return tp->p_name; 635 636 cp = buf; 637 if ((j = *pi >> 4) != 0) 638 *cp++ = hex[j]; 639 *cp++ = hex[*pi++ & 0xf]; 640 for (i = 4; (int)--i >= 0;) { 641 *cp++ = ':'; 642 if ((j = *pi >> 4) != 0) 643 *cp++ = hex[j]; 644 *cp++ = hex[*pi++ & 0xf]; 645 } 646 *cp = '\0'; 647 tp->p_name = strdup(buf); 648 return (tp->p_name); 649 } 650 651 #define ISONSAP_MAX_LENGTH 20 652 const char * 653 isonsap_string(const u_char *nsap, register u_int nsap_length) 654 { 655 register u_int nsap_idx; 656 register char *cp; 657 register struct enamemem *tp; 658 659 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH) 660 return ("isonsap_string: illegal length"); 661 662 tp = lookup_nsap(nsap); 663 if (tp->e_name) 664 return tp->e_name; 665 666 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")); 667 if (cp == NULL) 668 error("isonsap_string: malloc"); 669 670 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) { 671 *cp++ = hex[*nsap >> 4]; 672 *cp++ = hex[*nsap++ & 0xf]; 673 if (((nsap_idx & 1) == 0) && 674 (nsap_idx + 1 < nsap_length)) { 675 *cp++ = '.'; 676 } 677 } 678 *cp = '\0'; 679 return (tp->e_name); 680 } 681 682 const char * 683 tcpport_string(u_short port) 684 { 685 register struct hnamemem *tp; 686 register u_int32_t i = port; 687 char buf[sizeof("00000")]; 688 689 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 690 if (tp->addr == i) 691 return (tp->name); 692 693 tp->addr = i; 694 tp->nxt = newhnamemem(); 695 696 (void)snprintf(buf, sizeof(buf), "%u", i); 697 tp->name = strdup(buf); 698 return (tp->name); 699 } 700 701 const char * 702 udpport_string(register u_short port) 703 { 704 register struct hnamemem *tp; 705 register u_int32_t i = port; 706 char buf[sizeof("00000")]; 707 708 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 709 if (tp->addr == i) 710 return (tp->name); 711 712 tp->addr = i; 713 tp->nxt = newhnamemem(); 714 715 (void)snprintf(buf, sizeof(buf), "%u", i); 716 tp->name = strdup(buf); 717 return (tp->name); 718 } 719 720 const char * 721 ipxsap_string(u_short port) 722 { 723 register char *cp; 724 register struct hnamemem *tp; 725 register u_int32_t i = port; 726 char buf[sizeof("0000")]; 727 728 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 729 if (tp->addr == i) 730 return (tp->name); 731 732 tp->addr = i; 733 tp->nxt = newhnamemem(); 734 735 cp = buf; 736 NTOHS(port); 737 *cp++ = hex[port >> 12 & 0xf]; 738 *cp++ = hex[port >> 8 & 0xf]; 739 *cp++ = hex[port >> 4 & 0xf]; 740 *cp++ = hex[port & 0xf]; 741 *cp++ = '\0'; 742 tp->name = strdup(buf); 743 return (tp->name); 744 } 745 746 static void 747 init_servarray(void) 748 { 749 struct servent *sv; 750 register struct hnamemem *table; 751 register int i; 752 char buf[sizeof("0000000000")]; 753 754 while ((sv = getservent()) != NULL) { 755 int port = ntohs(sv->s_port); 756 i = port & (HASHNAMESIZE-1); 757 if (strcmp(sv->s_proto, "tcp") == 0) 758 table = &tporttable[i]; 759 else if (strcmp(sv->s_proto, "udp") == 0) 760 table = &uporttable[i]; 761 else 762 continue; 763 764 while (table->name) 765 table = table->nxt; 766 if (nflag) { 767 (void)snprintf(buf, sizeof(buf), "%d", port); 768 table->name = strdup(buf); 769 } else 770 table->name = strdup(sv->s_name); 771 table->addr = port; 772 table->nxt = newhnamemem(); 773 } 774 endservent(); 775 } 776 777 /* in libpcap.a (nametoaddr.c) */ 778 #if defined(WIN32) && !defined(USE_STATIC_LIBPCAP) 779 __declspec(dllimport) 780 #else 781 extern 782 #endif 783 const struct eproto { 784 const char *s; 785 u_short p; 786 } eproto_db[]; 787 788 static void 789 init_eprotoarray(void) 790 { 791 register int i; 792 register struct hnamemem *table; 793 794 for (i = 0; eproto_db[i].s; i++) { 795 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1); 796 table = &eprototable[j]; 797 while (table->name) 798 table = table->nxt; 799 table->name = eproto_db[i].s; 800 table->addr = htons(eproto_db[i].p); 801 table->nxt = newhnamemem(); 802 } 803 } 804 805 static const struct protoidlist { 806 const u_char protoid[5]; 807 const char *name; 808 } protoidlist[] = { 809 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" }, 810 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" }, 811 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" }, 812 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" }, 813 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" }, 814 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 815 }; 816 817 /* 818 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet 819 * types. 820 */ 821 static void 822 init_protoidarray(void) 823 { 824 register int i; 825 register struct protoidmem *tp; 826 const struct protoidlist *pl; 827 u_char protoid[5]; 828 829 protoid[0] = 0; 830 protoid[1] = 0; 831 protoid[2] = 0; 832 for (i = 0; eproto_db[i].s; i++) { 833 u_short etype = htons(eproto_db[i].p); 834 835 memcpy((char *)&protoid[3], (char *)&etype, 2); 836 tp = lookup_protoid(protoid); 837 tp->p_name = strdup(eproto_db[i].s); 838 } 839 /* Hardwire some SNAP proto ID names */ 840 for (pl = protoidlist; pl->name != NULL; ++pl) { 841 tp = lookup_protoid(pl->protoid); 842 /* Don't override existing name */ 843 if (tp->p_name != NULL) 844 continue; 845 846 tp->p_name = pl->name; 847 } 848 } 849 850 static const struct etherlist { 851 const u_char addr[6]; 852 const char *name; 853 } etherlist[] = { 854 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" }, 855 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 856 }; 857 858 /* 859 * Initialize the ethers hash table. We take two different approaches 860 * depending on whether or not the system provides the ethers name 861 * service. If it does, we just wire in a few names at startup, 862 * and etheraddr_string() fills in the table on demand. If it doesn't, 863 * then we suck in the entire /etc/ethers file at startup. The idea 864 * is that parsing the local file will be fast, but spinning through 865 * all the ethers entries via NIS & next_etherent might be very slow. 866 * 867 * XXX pcap_next_etherent doesn't belong in the pcap interface, but 868 * since the pcap module already does name-to-address translation, 869 * it's already does most of the work for the ethernet address-to-name 870 * translation, so we just pcap_next_etherent as a convenience. 871 */ 872 static void 873 init_etherarray(void) 874 { 875 register const struct etherlist *el; 876 register struct enamemem *tp; 877 #ifdef USE_ETHER_NTOHOST 878 char name[256]; 879 #else 880 register struct pcap_etherent *ep; 881 register FILE *fp; 882 883 /* Suck in entire ethers file */ 884 fp = fopen(PCAP_ETHERS_FILE, "r"); 885 if (fp != NULL) { 886 while ((ep = pcap_next_etherent(fp)) != NULL) { 887 tp = lookup_emem(ep->addr); 888 tp->e_name = strdup(ep->name); 889 } 890 (void)fclose(fp); 891 } 892 #endif 893 894 /* Hardwire some ethernet names */ 895 for (el = etherlist; el->name != NULL; ++el) { 896 tp = lookup_emem(el->addr); 897 /* Don't override existing name */ 898 if (tp->e_name != NULL) 899 continue; 900 901 #ifdef USE_ETHER_NTOHOST 902 /* 903 * Use YP/NIS version of name if available. 904 * 905 * We don't cast it to "const struct ether_addr *" 906 * because some systems don't modify the Ethernet 907 * address but fail to declare the second argument 908 * as a "const" pointer. 909 */ 910 if (ether_ntohost(name, (struct ether_addr *)el->addr) == 0) { 911 tp->e_name = strdup(name); 912 continue; 913 } 914 #endif 915 tp->e_name = el->name; 916 } 917 } 918 919 static const struct tok ipxsap_db[] = { 920 { 0x0000, "Unknown" }, 921 { 0x0001, "User" }, 922 { 0x0002, "User Group" }, 923 { 0x0003, "PrintQueue" }, 924 { 0x0004, "FileServer" }, 925 { 0x0005, "JobServer" }, 926 { 0x0006, "Gateway" }, 927 { 0x0007, "PrintServer" }, 928 { 0x0008, "ArchiveQueue" }, 929 { 0x0009, "ArchiveServer" }, 930 { 0x000a, "JobQueue" }, 931 { 0x000b, "Administration" }, 932 { 0x000F, "Novell TI-RPC" }, 933 { 0x0017, "Diagnostics" }, 934 { 0x0020, "NetBIOS" }, 935 { 0x0021, "NAS SNA Gateway" }, 936 { 0x0023, "NACS AsyncGateway" }, 937 { 0x0024, "RemoteBridge/RoutingService" }, 938 { 0x0026, "BridgeServer" }, 939 { 0x0027, "TCP/IP Gateway" }, 940 { 0x0028, "Point-to-point X.25 BridgeServer" }, 941 { 0x0029, "3270 Gateway" }, 942 { 0x002a, "CHI Corp" }, 943 { 0x002c, "PC Chalkboard" }, 944 { 0x002d, "TimeSynchServer" }, 945 { 0x002e, "ARCserve5.0/PalindromeBackup" }, 946 { 0x0045, "DI3270 Gateway" }, 947 { 0x0047, "AdvertisingPrintServer" }, 948 { 0x004a, "NetBlazerModems" }, 949 { 0x004b, "BtrieveVAP" }, 950 { 0x004c, "NetwareSQL" }, 951 { 0x004d, "XtreeNetwork" }, 952 { 0x0050, "BtrieveVAP4.11" }, 953 { 0x0052, "QuickLink" }, 954 { 0x0053, "PrintQueueUser" }, 955 { 0x0058, "Multipoint X.25 Router" }, 956 { 0x0060, "STLB/NLM" }, 957 { 0x0064, "ARCserve" }, 958 { 0x0066, "ARCserve3.0" }, 959 { 0x0072, "WAN CopyUtility" }, 960 { 0x007a, "TES-NetwareVMS" }, 961 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" }, 962 { 0x0095, "DDA OBGYN" }, 963 { 0x0098, "NetwareAccessServer" }, 964 { 0x009a, "Netware for VMS II/NamedPipeServer" }, 965 { 0x009b, "NetwareAccessServer" }, 966 { 0x009e, "PortableNetwareServer/SunLinkNVT" }, 967 { 0x00a1, "PowerchuteAPC UPS" }, 968 { 0x00aa, "LAWserve" }, 969 { 0x00ac, "CompaqIDA StatusMonitor" }, 970 { 0x0100, "PIPE STAIL" }, 971 { 0x0102, "LAN ProtectBindery" }, 972 { 0x0103, "OracleDataBaseServer" }, 973 { 0x0107, "Netware386/RSPX RemoteConsole" }, 974 { 0x010f, "NovellSNA Gateway" }, 975 { 0x0111, "TestServer" }, 976 { 0x0112, "HP PrintServer" }, 977 { 0x0114, "CSA MUX" }, 978 { 0x0115, "CSA LCA" }, 979 { 0x0116, "CSA CM" }, 980 { 0x0117, "CSA SMA" }, 981 { 0x0118, "CSA DBA" }, 982 { 0x0119, "CSA NMA" }, 983 { 0x011a, "CSA SSA" }, 984 { 0x011b, "CSA STATUS" }, 985 { 0x011e, "CSA APPC" }, 986 { 0x0126, "SNA TEST SSA Profile" }, 987 { 0x012a, "CSA TRACE" }, 988 { 0x012b, "NetwareSAA" }, 989 { 0x012e, "IKARUS VirusScan" }, 990 { 0x0130, "CommunicationsExecutive" }, 991 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" }, 992 { 0x0135, "NetwareNamingServicesProfile" }, 993 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" }, 994 { 0x0141, "LAN SpoolServer" }, 995 { 0x0152, "IRMALAN Gateway" }, 996 { 0x0154, "NamedPipeServer" }, 997 { 0x0166, "NetWareManagement" }, 998 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" }, 999 { 0x0173, "Compaq" }, 1000 { 0x0174, "Compaq SNMP Agent" }, 1001 { 0x0175, "Compaq" }, 1002 { 0x0180, "XTreeServer/XTreeTools" }, 1003 { 0x018A, "NASI ServicesBroadcastServer" }, 1004 { 0x01b0, "GARP Gateway" }, 1005 { 0x01b1, "Binfview" }, 1006 { 0x01bf, "IntelLanDeskManager" }, 1007 { 0x01ca, "AXTEC" }, 1008 { 0x01cb, "ShivaNetModem/E" }, 1009 { 0x01cc, "ShivaLanRover/E" }, 1010 { 0x01cd, "ShivaLanRover/T" }, 1011 { 0x01ce, "ShivaUniversal" }, 1012 { 0x01d8, "CastelleFAXPressServer" }, 1013 { 0x01da, "CastelleLANPressPrintServer" }, 1014 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" }, 1015 { 0x01f0, "LEGATO" }, 1016 { 0x01f5, "LEGATO" }, 1017 { 0x0233, "NMS Agent/NetwareManagementAgent" }, 1018 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" }, 1019 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" }, 1020 { 0x023a, "LANtern" }, 1021 { 0x023c, "MAVERICK" }, 1022 { 0x023f, "NovellSMDR" }, 1023 { 0x024e, "NetwareConnect" }, 1024 { 0x024f, "NASI ServerBroadcast Cisco" }, 1025 { 0x026a, "NMS ServiceConsole" }, 1026 { 0x026b, "TimeSynchronizationServer Netware 4.x" }, 1027 { 0x0278, "DirectoryServer Netware 4.x" }, 1028 { 0x027b, "NetwareManagementAgent" }, 1029 { 0x0280, "Novell File and Printer Sharing Service for PC" }, 1030 { 0x0304, "NovellSAA Gateway" }, 1031 { 0x0308, "COM/VERMED" }, 1032 { 0x030a, "GalacticommWorldgroupServer" }, 1033 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" }, 1034 { 0x0320, "AttachmateGateway" }, 1035 { 0x0327, "MicrosoftDiagnostiocs" }, 1036 { 0x0328, "WATCOM SQL Server" }, 1037 { 0x0335, "MultiTechSystems MultisynchCommServer" }, 1038 { 0x0343, "Xylogics RemoteAccessServer/LANModem" }, 1039 { 0x0355, "ArcadaBackupExec" }, 1040 { 0x0358, "MSLCD1" }, 1041 { 0x0361, "NETINELO" }, 1042 { 0x037e, "Powerchute UPS Monitoring" }, 1043 { 0x037f, "ViruSafeNotify" }, 1044 { 0x0386, "HP Bridge" }, 1045 { 0x0387, "HP Hub" }, 1046 { 0x0394, "NetWare SAA Gateway" }, 1047 { 0x039b, "LotusNotes" }, 1048 { 0x03b7, "CertusAntiVirus" }, 1049 { 0x03c4, "ARCserve4.0" }, 1050 { 0x03c7, "LANspool3.5" }, 1051 { 0x03d7, "LexmarkPrinterServer" }, 1052 { 0x03d8, "LexmarkXLE PrinterServer" }, 1053 { 0x03dd, "BanyanENS NetwareClient" }, 1054 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" }, 1055 { 0x03e1, "UnivelUnixware" }, 1056 { 0x03e4, "UnivelUnixware" }, 1057 { 0x03fc, "IntelNetport" }, 1058 { 0x03fd, "PrintServerQueue" }, 1059 { 0x040A, "ipnServer" }, 1060 { 0x040D, "LVERRMAN" }, 1061 { 0x040E, "LVLIC" }, 1062 { 0x0414, "NET Silicon (DPI)/Kyocera" }, 1063 { 0x0429, "SiteLockVirus" }, 1064 { 0x0432, "UFHELPR???" }, 1065 { 0x0433, "Synoptics281xAdvancedSNMPAgent" }, 1066 { 0x0444, "MicrosoftNT SNA Server" }, 1067 { 0x0448, "Oracle" }, 1068 { 0x044c, "ARCserve5.01" }, 1069 { 0x0457, "CanonGP55" }, 1070 { 0x045a, "QMS Printers" }, 1071 { 0x045b, "DellSCSI Array" }, 1072 { 0x0491, "NetBlazerModems" }, 1073 { 0x04ac, "OnTimeScheduler" }, 1074 { 0x04b0, "CD-Net" }, 1075 { 0x0513, "EmulexNQA" }, 1076 { 0x0520, "SiteLockChecks" }, 1077 { 0x0529, "SiteLockChecks" }, 1078 { 0x052d, "CitrixOS2 AppServer" }, 1079 { 0x0535, "Tektronix" }, 1080 { 0x0536, "Milan" }, 1081 { 0x055d, "Attachmate SNA gateway" }, 1082 { 0x056b, "IBM8235 ModemServer" }, 1083 { 0x056c, "ShivaLanRover/E PLUS" }, 1084 { 0x056d, "ShivaLanRover/T PLUS" }, 1085 { 0x0580, "McAfeeNetShield" }, 1086 { 0x05B8, "NLM to workstation communication (Revelation Software)" }, 1087 { 0x05BA, "CompatibleSystemsRouters" }, 1088 { 0x05BE, "CheyenneHierarchicalStorageManager" }, 1089 { 0x0606, "JCWatermarkImaging" }, 1090 { 0x060c, "AXISNetworkPrinter" }, 1091 { 0x0610, "AdaptecSCSIManagement" }, 1092 { 0x0621, "IBM AntiVirus" }, 1093 { 0x0640, "Windows95 RemoteRegistryService" }, 1094 { 0x064e, "MicrosoftIIS" }, 1095 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1096 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1097 { 0x076C, "Xerox" }, 1098 { 0x079b, "ShivaLanRover/E 115" }, 1099 { 0x079c, "ShivaLanRover/T 115" }, 1100 { 0x07B4, "CubixWorldDesk" }, 1101 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" }, 1102 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" }, 1103 { 0x0810, "ELAN License Server Demo" }, 1104 { 0x0824, "ShivaLanRoverAccessSwitch/E" }, 1105 { 0x086a, "ISSC Collector" }, 1106 { 0x087f, "ISSC DAS AgentAIX" }, 1107 { 0x0880, "Intel Netport PRO" }, 1108 { 0x0881, "Intel Netport PRO" }, 1109 { 0x0b29, "SiteLock" }, 1110 { 0x0c29, "SiteLockApplications" }, 1111 { 0x0c2c, "LicensingServer" }, 1112 { 0x2101, "PerformanceTechnologyInstantInternet" }, 1113 { 0x2380, "LAI SiteLock" }, 1114 { 0x238c, "MeetingMaker" }, 1115 { 0x4808, "SiteLockServer/SiteLockMetering" }, 1116 { 0x5555, "SiteLockUser" }, 1117 { 0x6312, "Tapeware" }, 1118 { 0x6f00, "RabbitGateway" }, 1119 { 0x7703, "MODEM" }, 1120 { 0x8002, "NetPortPrinters" }, 1121 { 0x8008, "WordPerfectNetworkVersion" }, 1122 { 0x85BE, "Cisco EIGRP" }, 1123 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" }, 1124 { 0x9000, "McAfeeNetShield" }, 1125 { 0x9604, "CSA-NT_MON" }, 1126 { 0xb6a8, "OceanIsleReachoutRemoteControl" }, 1127 { 0xf11f, "SiteLockMetering" }, 1128 { 0xf1ff, "SiteLock" }, 1129 { 0xf503, "Microsoft SQL Server" }, 1130 { 0xF905, "IBM TimeAndPlace" }, 1131 { 0xfbfb, "TopCallIII FaxServer" }, 1132 { 0xffff, "AnyService/Wildcard" }, 1133 { 0, (char *)0 } 1134 }; 1135 1136 static void 1137 init_ipxsaparray(void) 1138 { 1139 register int i; 1140 register struct hnamemem *table; 1141 1142 for (i = 0; ipxsap_db[i].s != NULL; i++) { 1143 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1); 1144 table = &ipxsaptable[j]; 1145 while (table->name) 1146 table = table->nxt; 1147 table->name = ipxsap_db[i].s; 1148 table->addr = htons(ipxsap_db[i].v); 1149 table->nxt = newhnamemem(); 1150 } 1151 } 1152 1153 /* 1154 * Initialize the address to name translation machinery. We map all 1155 * non-local IP addresses to numeric addresses if fflag is true (i.e., 1156 * to prevent blocking on the nameserver). localnet is the IP address 1157 * of the local network. mask is its subnet mask. 1158 */ 1159 void 1160 init_addrtoname(u_int32_t localnet, u_int32_t mask) 1161 { 1162 if (fflag) { 1163 f_localnet = localnet; 1164 f_netmask = mask; 1165 } 1166 if (nflag) 1167 /* 1168 * Simplest way to suppress names. 1169 */ 1170 return; 1171 1172 init_etherarray(); 1173 init_servarray(); 1174 init_eprotoarray(); 1175 init_protoidarray(); 1176 init_ipxsaparray(); 1177 } 1178 1179 const char * 1180 dnaddr_string(u_short dnaddr) 1181 { 1182 register struct hnamemem *tp; 1183 1184 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != 0; 1185 tp = tp->nxt) 1186 if (tp->addr == dnaddr) 1187 return (tp->name); 1188 1189 tp->addr = dnaddr; 1190 tp->nxt = newhnamemem(); 1191 if (nflag) 1192 tp->name = dnnum_string(dnaddr); 1193 else 1194 tp->name = dnname_string(dnaddr); 1195 1196 return(tp->name); 1197 } 1198 1199 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */ 1200 struct hnamemem * 1201 newhnamemem(void) 1202 { 1203 register struct hnamemem *p; 1204 static struct hnamemem *ptr = NULL; 1205 static u_int num = 0; 1206 1207 if (num <= 0) { 1208 num = 64; 1209 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr)); 1210 if (ptr == NULL) 1211 error("newhnamemem: calloc"); 1212 } 1213 --num; 1214 p = ptr++; 1215 return (p); 1216 } 1217 1218 #ifdef INET6 1219 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */ 1220 struct h6namemem * 1221 newh6namemem(void) 1222 { 1223 register struct h6namemem *p; 1224 static struct h6namemem *ptr = NULL; 1225 static u_int num = 0; 1226 1227 if (num <= 0) { 1228 num = 64; 1229 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr)); 1230 if (ptr == NULL) 1231 error("newh6namemem: calloc"); 1232 } 1233 --num; 1234 p = ptr++; 1235 return (p); 1236 } 1237 #endif /* INET6 */ 1238