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