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