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 memcpy(tp->e_bs, bs, nlen); 387 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 388 if (tp->e_nxt == NULL) 389 error("lookup_bytestring: calloc"); 390 391 return tp; 392 } 393 394 /* Find the hash node that corresponds the NSAP 'nsap' */ 395 396 static inline struct enamemem * 397 lookup_nsap(register const u_char *nsap) 398 { 399 register u_int i, j, k; 400 unsigned int nlen = *nsap; 401 struct enamemem *tp; 402 const u_char *ensap = nsap + nlen - 6; 403 404 if (nlen > 6) { 405 k = (ensap[0] << 8) | ensap[1]; 406 j = (ensap[2] << 8) | ensap[3]; 407 i = (ensap[4] << 8) | ensap[5]; 408 } 409 else 410 i = j = k = 0; 411 412 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)]; 413 while (tp->e_nxt) 414 if (tp->e_addr0 == i && 415 tp->e_addr1 == j && 416 tp->e_addr2 == k && 417 tp->e_nsap[0] == nlen && 418 memcmp((const char *)&(nsap[1]), 419 (char *)&(tp->e_nsap[1]), nlen) == 0) 420 return tp; 421 else 422 tp = tp->e_nxt; 423 tp->e_addr0 = i; 424 tp->e_addr1 = j; 425 tp->e_addr2 = k; 426 tp->e_nsap = (u_char *)malloc(nlen + 1); 427 if (tp->e_nsap == NULL) 428 error("lookup_nsap: malloc"); 429 memcpy((char *)tp->e_nsap, (const char *)nsap, nlen + 1); 430 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 431 if (tp->e_nxt == NULL) 432 error("lookup_nsap: calloc"); 433 434 return tp; 435 } 436 437 /* Find the hash node that corresponds the protoid 'pi'. */ 438 439 static inline struct protoidmem * 440 lookup_protoid(const u_char *pi) 441 { 442 register u_int i, j; 443 struct protoidmem *tp; 444 445 /* 5 octets won't be aligned */ 446 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2]; 447 j = (pi[3] << 8) + pi[4]; 448 /* XXX should be endian-insensitive, but do big-endian testing XXX */ 449 450 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)]; 451 while (tp->p_nxt) 452 if (tp->p_oui == i && tp->p_proto == j) 453 return tp; 454 else 455 tp = tp->p_nxt; 456 tp->p_oui = i; 457 tp->p_proto = j; 458 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp)); 459 if (tp->p_nxt == NULL) 460 error("lookup_protoid: calloc"); 461 462 return tp; 463 } 464 465 const char * 466 etheraddr_string(register const u_char *ep) 467 { 468 register int i; 469 register char *cp; 470 register struct enamemem *tp; 471 int oui; 472 char buf[BUFSIZE]; 473 474 tp = lookup_emem(ep); 475 if (tp->e_name) 476 return (tp->e_name); 477 #ifdef USE_ETHER_NTOHOST 478 if (!nflag) { 479 char buf2[BUFSIZE]; 480 481 /* 482 * We don't cast it to "const struct ether_addr *" 483 * because some systems fail to declare the second 484 * argument as a "const" pointer, even though they 485 * don't modify what it points to. 486 */ 487 if (ether_ntohost(buf2, (struct ether_addr *)ep) == 0) { 488 tp->e_name = strdup(buf2); 489 return (tp->e_name); 490 } 491 } 492 #endif 493 cp = buf; 494 oui = EXTRACT_24BITS(ep); 495 *cp++ = hex[*ep >> 4 ]; 496 *cp++ = hex[*ep++ & 0xf]; 497 for (i = 5; --i >= 0;) { 498 *cp++ = ':'; 499 *cp++ = hex[*ep >> 4 ]; 500 *cp++ = hex[*ep++ & 0xf]; 501 } 502 503 if (!nflag) { 504 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)", 505 tok2str(oui_values, "Unknown", oui)); 506 } else 507 *cp = '\0'; 508 tp->e_name = strdup(buf); 509 return (tp->e_name); 510 } 511 512 const char * 513 le64addr_string(const u_char *ep) 514 { 515 const unsigned int len = 8; 516 register u_int i; 517 register char *cp; 518 register struct enamemem *tp; 519 char buf[BUFSIZE]; 520 521 tp = lookup_bytestring(ep, len); 522 if (tp->e_name) 523 return (tp->e_name); 524 525 cp = buf; 526 for (i = len; i > 0 ; --i) { 527 *cp++ = hex[*(ep + i - 1) >> 4]; 528 *cp++ = hex[*(ep + i - 1) & 0xf]; 529 *cp++ = ':'; 530 } 531 cp --; 532 533 *cp = '\0'; 534 535 tp->e_name = strdup(buf); 536 537 return (tp->e_name); 538 } 539 540 const char * 541 linkaddr_string(const u_char *ep, const unsigned int type, const unsigned int len) 542 { 543 register u_int i; 544 register char *cp; 545 register struct enamemem *tp; 546 547 if (len == 0) 548 return ("<empty>"); 549 550 if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN) 551 return (etheraddr_string(ep)); 552 553 if (type == LINKADDR_FRELAY) 554 return (q922_string(ep)); 555 556 tp = lookup_bytestring(ep, len); 557 if (tp->e_name) 558 return (tp->e_name); 559 560 tp->e_name = cp = (char *)malloc(len*3); 561 if (tp->e_name == NULL) 562 error("linkaddr_string: malloc"); 563 *cp++ = hex[*ep >> 4]; 564 *cp++ = hex[*ep++ & 0xf]; 565 for (i = len-1; i > 0 ; --i) { 566 *cp++ = ':'; 567 *cp++ = hex[*ep >> 4]; 568 *cp++ = hex[*ep++ & 0xf]; 569 } 570 *cp = '\0'; 571 return (tp->e_name); 572 } 573 574 const char * 575 etherproto_string(u_short port) 576 { 577 register char *cp; 578 register struct hnamemem *tp; 579 register u_int32_t i = port; 580 char buf[sizeof("0000")]; 581 582 for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 583 if (tp->addr == i) 584 return (tp->name); 585 586 tp->addr = i; 587 tp->nxt = newhnamemem(); 588 589 cp = buf; 590 NTOHS(port); 591 *cp++ = hex[port >> 12 & 0xf]; 592 *cp++ = hex[port >> 8 & 0xf]; 593 *cp++ = hex[port >> 4 & 0xf]; 594 *cp++ = hex[port & 0xf]; 595 *cp++ = '\0'; 596 tp->name = strdup(buf); 597 return (tp->name); 598 } 599 600 const char * 601 protoid_string(register const u_char *pi) 602 { 603 register u_int i, j; 604 register char *cp; 605 register struct protoidmem *tp; 606 char buf[sizeof("00:00:00:00:00")]; 607 608 tp = lookup_protoid(pi); 609 if (tp->p_name) 610 return tp->p_name; 611 612 cp = buf; 613 if ((j = *pi >> 4) != 0) 614 *cp++ = hex[j]; 615 *cp++ = hex[*pi++ & 0xf]; 616 for (i = 4; (int)--i >= 0;) { 617 *cp++ = ':'; 618 if ((j = *pi >> 4) != 0) 619 *cp++ = hex[j]; 620 *cp++ = hex[*pi++ & 0xf]; 621 } 622 *cp = '\0'; 623 tp->p_name = strdup(buf); 624 return (tp->p_name); 625 } 626 627 #define ISONSAP_MAX_LENGTH 20 628 const char * 629 isonsap_string(const u_char *nsap, register u_int nsap_length) 630 { 631 register u_int nsap_idx; 632 register char *cp; 633 register struct enamemem *tp; 634 635 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH) 636 return ("isonsap_string: illegal length"); 637 638 tp = lookup_nsap(nsap); 639 if (tp->e_name) 640 return tp->e_name; 641 642 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")); 643 if (cp == NULL) 644 error("isonsap_string: malloc"); 645 646 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) { 647 *cp++ = hex[*nsap >> 4]; 648 *cp++ = hex[*nsap++ & 0xf]; 649 if (((nsap_idx & 1) == 0) && 650 (nsap_idx + 1 < nsap_length)) { 651 *cp++ = '.'; 652 } 653 } 654 *cp = '\0'; 655 return (tp->e_name); 656 } 657 658 const char * 659 tcpport_string(u_short port) 660 { 661 register struct hnamemem *tp; 662 register u_int32_t i = port; 663 char buf[sizeof("00000")]; 664 665 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 666 if (tp->addr == i) 667 return (tp->name); 668 669 tp->addr = i; 670 tp->nxt = newhnamemem(); 671 672 (void)snprintf(buf, sizeof(buf), "%u", i); 673 tp->name = strdup(buf); 674 return (tp->name); 675 } 676 677 const char * 678 udpport_string(register u_short port) 679 { 680 register struct hnamemem *tp; 681 register u_int32_t i = port; 682 char buf[sizeof("00000")]; 683 684 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 685 if (tp->addr == i) 686 return (tp->name); 687 688 tp->addr = i; 689 tp->nxt = newhnamemem(); 690 691 (void)snprintf(buf, sizeof(buf), "%u", i); 692 tp->name = strdup(buf); 693 return (tp->name); 694 } 695 696 const char * 697 ipxsap_string(u_short port) 698 { 699 register char *cp; 700 register struct hnamemem *tp; 701 register u_int32_t i = port; 702 char buf[sizeof("0000")]; 703 704 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 705 if (tp->addr == i) 706 return (tp->name); 707 708 tp->addr = i; 709 tp->nxt = newhnamemem(); 710 711 cp = buf; 712 NTOHS(port); 713 *cp++ = hex[port >> 12 & 0xf]; 714 *cp++ = hex[port >> 8 & 0xf]; 715 *cp++ = hex[port >> 4 & 0xf]; 716 *cp++ = hex[port & 0xf]; 717 *cp++ = '\0'; 718 tp->name = strdup(buf); 719 return (tp->name); 720 } 721 722 static void 723 init_servarray(void) 724 { 725 struct servent *sv; 726 register struct hnamemem *table; 727 register int i; 728 char buf[sizeof("0000000000")]; 729 730 while ((sv = getservent()) != NULL) { 731 int port = ntohs(sv->s_port); 732 i = port & (HASHNAMESIZE-1); 733 if (strcmp(sv->s_proto, "tcp") == 0) 734 table = &tporttable[i]; 735 else if (strcmp(sv->s_proto, "udp") == 0) 736 table = &uporttable[i]; 737 else 738 continue; 739 740 while (table->name) 741 table = table->nxt; 742 if (nflag) { 743 (void)snprintf(buf, sizeof(buf), "%d", port); 744 table->name = strdup(buf); 745 } else 746 table->name = strdup(sv->s_name); 747 table->addr = port; 748 table->nxt = newhnamemem(); 749 } 750 endservent(); 751 } 752 753 /* in libpcap.a (nametoaddr.c) */ 754 #if defined(WIN32) && !defined(USE_STATIC_LIBPCAP) 755 __declspec(dllimport) 756 #else 757 extern 758 #endif 759 const struct eproto { 760 const char *s; 761 u_short p; 762 } eproto_db[]; 763 764 static void 765 init_eprotoarray(void) 766 { 767 register int i; 768 register struct hnamemem *table; 769 770 for (i = 0; eproto_db[i].s; i++) { 771 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1); 772 table = &eprototable[j]; 773 while (table->name) 774 table = table->nxt; 775 table->name = eproto_db[i].s; 776 table->addr = htons(eproto_db[i].p); 777 table->nxt = newhnamemem(); 778 } 779 } 780 781 static const struct protoidlist { 782 const u_char protoid[5]; 783 const char *name; 784 } protoidlist[] = { 785 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" }, 786 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" }, 787 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" }, 788 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" }, 789 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" }, 790 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 791 }; 792 793 /* 794 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet 795 * types. 796 */ 797 static void 798 init_protoidarray(void) 799 { 800 register int i; 801 register struct protoidmem *tp; 802 const struct protoidlist *pl; 803 u_char protoid[5]; 804 805 protoid[0] = 0; 806 protoid[1] = 0; 807 protoid[2] = 0; 808 for (i = 0; eproto_db[i].s; i++) { 809 u_short etype = htons(eproto_db[i].p); 810 811 memcpy((char *)&protoid[3], (char *)&etype, 2); 812 tp = lookup_protoid(protoid); 813 tp->p_name = strdup(eproto_db[i].s); 814 } 815 /* Hardwire some SNAP proto ID names */ 816 for (pl = protoidlist; pl->name != NULL; ++pl) { 817 tp = lookup_protoid(pl->protoid); 818 /* Don't override existing name */ 819 if (tp->p_name != NULL) 820 continue; 821 822 tp->p_name = pl->name; 823 } 824 } 825 826 static const struct etherlist { 827 const u_char addr[6]; 828 const char *name; 829 } etherlist[] = { 830 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" }, 831 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 832 }; 833 834 /* 835 * Initialize the ethers hash table. We take two different approaches 836 * depending on whether or not the system provides the ethers name 837 * service. If it does, we just wire in a few names at startup, 838 * and etheraddr_string() fills in the table on demand. If it doesn't, 839 * then we suck in the entire /etc/ethers file at startup. The idea 840 * is that parsing the local file will be fast, but spinning through 841 * all the ethers entries via NIS & next_etherent might be very slow. 842 * 843 * XXX pcap_next_etherent doesn't belong in the pcap interface, but 844 * since the pcap module already does name-to-address translation, 845 * it's already does most of the work for the ethernet address-to-name 846 * translation, so we just pcap_next_etherent as a convenience. 847 */ 848 static void 849 init_etherarray(void) 850 { 851 register const struct etherlist *el; 852 register struct enamemem *tp; 853 #ifdef USE_ETHER_NTOHOST 854 char name[256]; 855 #else 856 register struct pcap_etherent *ep; 857 register FILE *fp; 858 859 /* Suck in entire ethers file */ 860 fp = fopen(PCAP_ETHERS_FILE, "r"); 861 if (fp != NULL) { 862 while ((ep = pcap_next_etherent(fp)) != NULL) { 863 tp = lookup_emem(ep->addr); 864 tp->e_name = strdup(ep->name); 865 } 866 (void)fclose(fp); 867 } 868 #endif 869 870 /* Hardwire some ethernet names */ 871 for (el = etherlist; el->name != NULL; ++el) { 872 tp = lookup_emem(el->addr); 873 /* Don't override existing name */ 874 if (tp->e_name != NULL) 875 continue; 876 877 #ifdef USE_ETHER_NTOHOST 878 /* 879 * Use YP/NIS version of name if available. 880 * 881 * We don't cast it to "const struct ether_addr *" 882 * because some systems don't modify the Ethernet 883 * address but fail to declare the second argument 884 * as a "const" pointer. 885 */ 886 if (ether_ntohost(name, (struct ether_addr *)el->addr) == 0) { 887 tp->e_name = strdup(name); 888 continue; 889 } 890 #endif 891 tp->e_name = el->name; 892 } 893 } 894 895 static const struct tok ipxsap_db[] = { 896 { 0x0000, "Unknown" }, 897 { 0x0001, "User" }, 898 { 0x0002, "User Group" }, 899 { 0x0003, "PrintQueue" }, 900 { 0x0004, "FileServer" }, 901 { 0x0005, "JobServer" }, 902 { 0x0006, "Gateway" }, 903 { 0x0007, "PrintServer" }, 904 { 0x0008, "ArchiveQueue" }, 905 { 0x0009, "ArchiveServer" }, 906 { 0x000a, "JobQueue" }, 907 { 0x000b, "Administration" }, 908 { 0x000F, "Novell TI-RPC" }, 909 { 0x0017, "Diagnostics" }, 910 { 0x0020, "NetBIOS" }, 911 { 0x0021, "NAS SNA Gateway" }, 912 { 0x0023, "NACS AsyncGateway" }, 913 { 0x0024, "RemoteBridge/RoutingService" }, 914 { 0x0026, "BridgeServer" }, 915 { 0x0027, "TCP/IP Gateway" }, 916 { 0x0028, "Point-to-point X.25 BridgeServer" }, 917 { 0x0029, "3270 Gateway" }, 918 { 0x002a, "CHI Corp" }, 919 { 0x002c, "PC Chalkboard" }, 920 { 0x002d, "TimeSynchServer" }, 921 { 0x002e, "ARCserve5.0/PalindromeBackup" }, 922 { 0x0045, "DI3270 Gateway" }, 923 { 0x0047, "AdvertisingPrintServer" }, 924 { 0x004a, "NetBlazerModems" }, 925 { 0x004b, "BtrieveVAP" }, 926 { 0x004c, "NetwareSQL" }, 927 { 0x004d, "XtreeNetwork" }, 928 { 0x0050, "BtrieveVAP4.11" }, 929 { 0x0052, "QuickLink" }, 930 { 0x0053, "PrintQueueUser" }, 931 { 0x0058, "Multipoint X.25 Router" }, 932 { 0x0060, "STLB/NLM" }, 933 { 0x0064, "ARCserve" }, 934 { 0x0066, "ARCserve3.0" }, 935 { 0x0072, "WAN CopyUtility" }, 936 { 0x007a, "TES-NetwareVMS" }, 937 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" }, 938 { 0x0095, "DDA OBGYN" }, 939 { 0x0098, "NetwareAccessServer" }, 940 { 0x009a, "Netware for VMS II/NamedPipeServer" }, 941 { 0x009b, "NetwareAccessServer" }, 942 { 0x009e, "PortableNetwareServer/SunLinkNVT" }, 943 { 0x00a1, "PowerchuteAPC UPS" }, 944 { 0x00aa, "LAWserve" }, 945 { 0x00ac, "CompaqIDA StatusMonitor" }, 946 { 0x0100, "PIPE STAIL" }, 947 { 0x0102, "LAN ProtectBindery" }, 948 { 0x0103, "OracleDataBaseServer" }, 949 { 0x0107, "Netware386/RSPX RemoteConsole" }, 950 { 0x010f, "NovellSNA Gateway" }, 951 { 0x0111, "TestServer" }, 952 { 0x0112, "HP PrintServer" }, 953 { 0x0114, "CSA MUX" }, 954 { 0x0115, "CSA LCA" }, 955 { 0x0116, "CSA CM" }, 956 { 0x0117, "CSA SMA" }, 957 { 0x0118, "CSA DBA" }, 958 { 0x0119, "CSA NMA" }, 959 { 0x011a, "CSA SSA" }, 960 { 0x011b, "CSA STATUS" }, 961 { 0x011e, "CSA APPC" }, 962 { 0x0126, "SNA TEST SSA Profile" }, 963 { 0x012a, "CSA TRACE" }, 964 { 0x012b, "NetwareSAA" }, 965 { 0x012e, "IKARUS VirusScan" }, 966 { 0x0130, "CommunicationsExecutive" }, 967 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" }, 968 { 0x0135, "NetwareNamingServicesProfile" }, 969 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" }, 970 { 0x0141, "LAN SpoolServer" }, 971 { 0x0152, "IRMALAN Gateway" }, 972 { 0x0154, "NamedPipeServer" }, 973 { 0x0166, "NetWareManagement" }, 974 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" }, 975 { 0x0173, "Compaq" }, 976 { 0x0174, "Compaq SNMP Agent" }, 977 { 0x0175, "Compaq" }, 978 { 0x0180, "XTreeServer/XTreeTools" }, 979 { 0x018A, "NASI ServicesBroadcastServer" }, 980 { 0x01b0, "GARP Gateway" }, 981 { 0x01b1, "Binfview" }, 982 { 0x01bf, "IntelLanDeskManager" }, 983 { 0x01ca, "AXTEC" }, 984 { 0x01cb, "ShivaNetModem/E" }, 985 { 0x01cc, "ShivaLanRover/E" }, 986 { 0x01cd, "ShivaLanRover/T" }, 987 { 0x01ce, "ShivaUniversal" }, 988 { 0x01d8, "CastelleFAXPressServer" }, 989 { 0x01da, "CastelleLANPressPrintServer" }, 990 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" }, 991 { 0x01f0, "LEGATO" }, 992 { 0x01f5, "LEGATO" }, 993 { 0x0233, "NMS Agent/NetwareManagementAgent" }, 994 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" }, 995 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" }, 996 { 0x023a, "LANtern" }, 997 { 0x023c, "MAVERICK" }, 998 { 0x023f, "NovellSMDR" }, 999 { 0x024e, "NetwareConnect" }, 1000 { 0x024f, "NASI ServerBroadcast Cisco" }, 1001 { 0x026a, "NMS ServiceConsole" }, 1002 { 0x026b, "TimeSynchronizationServer Netware 4.x" }, 1003 { 0x0278, "DirectoryServer Netware 4.x" }, 1004 { 0x027b, "NetwareManagementAgent" }, 1005 { 0x0280, "Novell File and Printer Sharing Service for PC" }, 1006 { 0x0304, "NovellSAA Gateway" }, 1007 { 0x0308, "COM/VERMED" }, 1008 { 0x030a, "GalacticommWorldgroupServer" }, 1009 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" }, 1010 { 0x0320, "AttachmateGateway" }, 1011 { 0x0327, "MicrosoftDiagnostiocs" }, 1012 { 0x0328, "WATCOM SQL Server" }, 1013 { 0x0335, "MultiTechSystems MultisynchCommServer" }, 1014 { 0x0343, "Xylogics RemoteAccessServer/LANModem" }, 1015 { 0x0355, "ArcadaBackupExec" }, 1016 { 0x0358, "MSLCD1" }, 1017 { 0x0361, "NETINELO" }, 1018 { 0x037e, "Powerchute UPS Monitoring" }, 1019 { 0x037f, "ViruSafeNotify" }, 1020 { 0x0386, "HP Bridge" }, 1021 { 0x0387, "HP Hub" }, 1022 { 0x0394, "NetWare SAA Gateway" }, 1023 { 0x039b, "LotusNotes" }, 1024 { 0x03b7, "CertusAntiVirus" }, 1025 { 0x03c4, "ARCserve4.0" }, 1026 { 0x03c7, "LANspool3.5" }, 1027 { 0x03d7, "LexmarkPrinterServer" }, 1028 { 0x03d8, "LexmarkXLE PrinterServer" }, 1029 { 0x03dd, "BanyanENS NetwareClient" }, 1030 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" }, 1031 { 0x03e1, "UnivelUnixware" }, 1032 { 0x03e4, "UnivelUnixware" }, 1033 { 0x03fc, "IntelNetport" }, 1034 { 0x03fd, "PrintServerQueue" }, 1035 { 0x040A, "ipnServer" }, 1036 { 0x040D, "LVERRMAN" }, 1037 { 0x040E, "LVLIC" }, 1038 { 0x0414, "NET Silicon (DPI)/Kyocera" }, 1039 { 0x0429, "SiteLockVirus" }, 1040 { 0x0432, "UFHELPR???" }, 1041 { 0x0433, "Synoptics281xAdvancedSNMPAgent" }, 1042 { 0x0444, "MicrosoftNT SNA Server" }, 1043 { 0x0448, "Oracle" }, 1044 { 0x044c, "ARCserve5.01" }, 1045 { 0x0457, "CanonGP55" }, 1046 { 0x045a, "QMS Printers" }, 1047 { 0x045b, "DellSCSI Array" }, 1048 { 0x0491, "NetBlazerModems" }, 1049 { 0x04ac, "OnTimeScheduler" }, 1050 { 0x04b0, "CD-Net" }, 1051 { 0x0513, "EmulexNQA" }, 1052 { 0x0520, "SiteLockChecks" }, 1053 { 0x0529, "SiteLockChecks" }, 1054 { 0x052d, "CitrixOS2 AppServer" }, 1055 { 0x0535, "Tektronix" }, 1056 { 0x0536, "Milan" }, 1057 { 0x055d, "Attachmate SNA gateway" }, 1058 { 0x056b, "IBM8235 ModemServer" }, 1059 { 0x056c, "ShivaLanRover/E PLUS" }, 1060 { 0x056d, "ShivaLanRover/T PLUS" }, 1061 { 0x0580, "McAfeeNetShield" }, 1062 { 0x05B8, "NLM to workstation communication (Revelation Software)" }, 1063 { 0x05BA, "CompatibleSystemsRouters" }, 1064 { 0x05BE, "CheyenneHierarchicalStorageManager" }, 1065 { 0x0606, "JCWatermarkImaging" }, 1066 { 0x060c, "AXISNetworkPrinter" }, 1067 { 0x0610, "AdaptecSCSIManagement" }, 1068 { 0x0621, "IBM AntiVirus" }, 1069 { 0x0640, "Windows95 RemoteRegistryService" }, 1070 { 0x064e, "MicrosoftIIS" }, 1071 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1072 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1073 { 0x076C, "Xerox" }, 1074 { 0x079b, "ShivaLanRover/E 115" }, 1075 { 0x079c, "ShivaLanRover/T 115" }, 1076 { 0x07B4, "CubixWorldDesk" }, 1077 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" }, 1078 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" }, 1079 { 0x0810, "ELAN License Server Demo" }, 1080 { 0x0824, "ShivaLanRoverAccessSwitch/E" }, 1081 { 0x086a, "ISSC Collector" }, 1082 { 0x087f, "ISSC DAS AgentAIX" }, 1083 { 0x0880, "Intel Netport PRO" }, 1084 { 0x0881, "Intel Netport PRO" }, 1085 { 0x0b29, "SiteLock" }, 1086 { 0x0c29, "SiteLockApplications" }, 1087 { 0x0c2c, "LicensingServer" }, 1088 { 0x2101, "PerformanceTechnologyInstantInternet" }, 1089 { 0x2380, "LAI SiteLock" }, 1090 { 0x238c, "MeetingMaker" }, 1091 { 0x4808, "SiteLockServer/SiteLockMetering" }, 1092 { 0x5555, "SiteLockUser" }, 1093 { 0x6312, "Tapeware" }, 1094 { 0x6f00, "RabbitGateway" }, 1095 { 0x7703, "MODEM" }, 1096 { 0x8002, "NetPortPrinters" }, 1097 { 0x8008, "WordPerfectNetworkVersion" }, 1098 { 0x85BE, "Cisco EIGRP" }, 1099 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" }, 1100 { 0x9000, "McAfeeNetShield" }, 1101 { 0x9604, "CSA-NT_MON" }, 1102 { 0xb6a8, "OceanIsleReachoutRemoteControl" }, 1103 { 0xf11f, "SiteLockMetering" }, 1104 { 0xf1ff, "SiteLock" }, 1105 { 0xf503, "Microsoft SQL Server" }, 1106 { 0xF905, "IBM TimeAndPlace" }, 1107 { 0xfbfb, "TopCallIII FaxServer" }, 1108 { 0xffff, "AnyService/Wildcard" }, 1109 { 0, (char *)0 } 1110 }; 1111 1112 static void 1113 init_ipxsaparray(void) 1114 { 1115 register int i; 1116 register struct hnamemem *table; 1117 1118 for (i = 0; ipxsap_db[i].s != NULL; i++) { 1119 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1); 1120 table = &ipxsaptable[j]; 1121 while (table->name) 1122 table = table->nxt; 1123 table->name = ipxsap_db[i].s; 1124 table->addr = htons(ipxsap_db[i].v); 1125 table->nxt = newhnamemem(); 1126 } 1127 } 1128 1129 /* 1130 * Initialize the address to name translation machinery. We map all 1131 * non-local IP addresses to numeric addresses if fflag is true (i.e., 1132 * to prevent blocking on the nameserver). localnet is the IP address 1133 * of the local network. mask is its subnet mask. 1134 */ 1135 void 1136 init_addrtoname(u_int32_t localnet, u_int32_t mask) 1137 { 1138 if (fflag) { 1139 f_localnet = localnet; 1140 f_netmask = mask; 1141 } 1142 if (nflag) 1143 /* 1144 * Simplest way to suppress names. 1145 */ 1146 return; 1147 1148 init_etherarray(); 1149 init_servarray(); 1150 init_eprotoarray(); 1151 init_protoidarray(); 1152 init_ipxsaparray(); 1153 } 1154 1155 const char * 1156 dnaddr_string(u_short dnaddr) 1157 { 1158 register struct hnamemem *tp; 1159 1160 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != 0; 1161 tp = tp->nxt) 1162 if (tp->addr == dnaddr) 1163 return (tp->name); 1164 1165 tp->addr = dnaddr; 1166 tp->nxt = newhnamemem(); 1167 if (nflag) 1168 tp->name = dnnum_string(dnaddr); 1169 else 1170 tp->name = dnname_string(dnaddr); 1171 1172 return(tp->name); 1173 } 1174 1175 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */ 1176 struct hnamemem * 1177 newhnamemem(void) 1178 { 1179 register struct hnamemem *p; 1180 static struct hnamemem *ptr = NULL; 1181 static u_int num = 0; 1182 1183 if (num <= 0) { 1184 num = 64; 1185 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr)); 1186 if (ptr == NULL) 1187 error("newhnamemem: calloc"); 1188 } 1189 --num; 1190 p = ptr++; 1191 return (p); 1192 } 1193 1194 #ifdef INET6 1195 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */ 1196 struct h6namemem * 1197 newh6namemem(void) 1198 { 1199 register struct h6namemem *p; 1200 static struct h6namemem *ptr = NULL; 1201 static u_int num = 0; 1202 1203 if (num <= 0) { 1204 num = 64; 1205 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr)); 1206 if (ptr == NULL) 1207 error("newh6namemem: calloc"); 1208 } 1209 --num; 1210 p = ptr++; 1211 return (p); 1212 } 1213 #endif /* INET6 */ 1214