addrtoname.c revision 356341
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 25#ifdef HAVE_CONFIG_H 26#include "config.h" 27#endif 28 29#ifdef HAVE_CASPER 30#include <libcasper.h> 31#include <casper/cap_dns.h> 32#endif /* HAVE_CASPER */ 33 34#include <netdissect-stdinc.h> 35 36#ifdef USE_ETHER_NTOHOST 37#ifdef HAVE_NETINET_IF_ETHER_H 38struct mbuf; /* Squelch compiler warnings on some platforms for */ 39struct rtentry; /* declarations in <net/if.h> */ 40#include <net/if.h> /* for "struct ifnet" in "struct arpcom" on Solaris */ 41#include <netinet/if_ether.h> 42#endif /* HAVE_NETINET_IF_ETHER_H */ 43#ifdef NETINET_ETHER_H_DECLARES_ETHER_NTOHOST 44#include <netinet/ether.h> 45#endif /* NETINET_ETHER_H_DECLARES_ETHER_NTOHOST */ 46 47#if !defined(HAVE_DECL_ETHER_NTOHOST) || !HAVE_DECL_ETHER_NTOHOST 48#ifndef HAVE_STRUCT_ETHER_ADDR 49struct ether_addr { 50 unsigned char ether_addr_octet[6]; 51}; 52#endif 53extern int ether_ntohost(char *, const struct ether_addr *); 54#endif 55 56#endif /* USE_ETHER_NTOHOST */ 57 58#include <pcap.h> 59#include <pcap-namedb.h> 60#include <signal.h> 61#include <stdio.h> 62#include <string.h> 63#include <stdlib.h> 64 65#include "netdissect.h" 66#include "addrtoname.h" 67#include "addrtostr.h" 68#include "ethertype.h" 69#include "llc.h" 70#include "setsignal.h" 71#include "extract.h" 72#include "oui.h" 73 74#ifndef ETHER_ADDR_LEN 75#define ETHER_ADDR_LEN 6 76#endif 77 78/* 79 * hash tables for whatever-to-name translations 80 * 81 * ndo_error() called on strdup(3) failure 82 */ 83 84#define HASHNAMESIZE 4096 85 86struct hnamemem { 87 uint32_t addr; 88 const char *name; 89 struct hnamemem *nxt; 90}; 91 92static struct hnamemem hnametable[HASHNAMESIZE]; 93static struct hnamemem tporttable[HASHNAMESIZE]; 94static struct hnamemem uporttable[HASHNAMESIZE]; 95static struct hnamemem eprototable[HASHNAMESIZE]; 96static struct hnamemem dnaddrtable[HASHNAMESIZE]; 97static struct hnamemem ipxsaptable[HASHNAMESIZE]; 98 99#ifdef _WIN32 100/* 101 * fake gethostbyaddr for Win2k/XP 102 * gethostbyaddr() returns incorrect value when AF_INET6 is passed 103 * to 3rd argument. 104 * 105 * h_name in struct hostent is only valid. 106 */ 107static struct hostent * 108win32_gethostbyaddr(const char *addr, int len, int type) 109{ 110 static struct hostent host; 111 static char hostbuf[NI_MAXHOST]; 112 char hname[NI_MAXHOST]; 113 struct sockaddr_in6 addr6; 114 115 host.h_name = hostbuf; 116 switch (type) { 117 case AF_INET: 118 return gethostbyaddr(addr, len, type); 119 break; 120 case AF_INET6: 121 memset(&addr6, 0, sizeof(addr6)); 122 addr6.sin6_family = AF_INET6; 123 memcpy(&addr6.sin6_addr, addr, len); 124 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6), 125 hname, sizeof(hname), NULL, 0, 0)) { 126 return NULL; 127 } else { 128 strlcpy(host.h_name, hname, NI_MAXHOST); 129 return &host; 130 } 131 break; 132 default: 133 return NULL; 134 } 135} 136#define gethostbyaddr win32_gethostbyaddr 137#endif /* _WIN32 */ 138 139struct h6namemem { 140 struct in6_addr addr; 141 char *name; 142 struct h6namemem *nxt; 143}; 144 145static struct h6namemem h6nametable[HASHNAMESIZE]; 146 147struct enamemem { 148 u_short e_addr0; 149 u_short e_addr1; 150 u_short e_addr2; 151 const char *e_name; 152 u_char *e_nsap; /* used only for nsaptable[] */ 153 struct enamemem *e_nxt; 154}; 155 156static struct enamemem enametable[HASHNAMESIZE]; 157static struct enamemem nsaptable[HASHNAMESIZE]; 158 159struct bsnamemem { 160 u_short bs_addr0; 161 u_short bs_addr1; 162 u_short bs_addr2; 163 const char *bs_name; 164 u_char *bs_bytes; 165 unsigned int bs_nbytes; 166 struct bsnamemem *bs_nxt; 167}; 168 169static struct bsnamemem bytestringtable[HASHNAMESIZE]; 170 171struct protoidmem { 172 uint32_t p_oui; 173 u_short p_proto; 174 const char *p_name; 175 struct protoidmem *p_nxt; 176}; 177 178static struct protoidmem protoidtable[HASHNAMESIZE]; 179 180/* 181 * A faster replacement for inet_ntoa(). 182 */ 183const char * 184intoa(uint32_t addr) 185{ 186 register char *cp; 187 register u_int byte; 188 register int n; 189 static char buf[sizeof(".xxx.xxx.xxx.xxx")]; 190 191 NTOHL(addr); 192 cp = buf + sizeof(buf); 193 *--cp = '\0'; 194 195 n = 4; 196 do { 197 byte = addr & 0xff; 198 *--cp = byte % 10 + '0'; 199 byte /= 10; 200 if (byte > 0) { 201 *--cp = byte % 10 + '0'; 202 byte /= 10; 203 if (byte > 0) 204 *--cp = byte + '0'; 205 } 206 *--cp = '.'; 207 addr >>= 8; 208 } while (--n > 0); 209 210 return cp + 1; 211} 212 213static uint32_t f_netmask; 214static uint32_t f_localnet; 215#ifdef HAVE_CASPER 216extern cap_channel_t *capdns; 217#endif 218 219/* 220 * Return a name for the IP address pointed to by ap. This address 221 * is assumed to be in network byte order. 222 * 223 * NOTE: ap is *NOT* necessarily part of the packet data (not even if 224 * this is being called with the "ipaddr_string()" macro), so you 225 * *CANNOT* use the ND_TCHECK{2}/ND_TTEST{2} macros on it. Furthermore, 226 * even in cases where it *is* part of the packet data, the caller 227 * would still have to check for a null return value, even if it's 228 * just printing the return value with "%s" - not all versions of 229 * printf print "(null)" with "%s" and a null pointer, some of them 230 * don't check for a null pointer and crash in that case. 231 * 232 * The callers of this routine should, before handing this routine 233 * a pointer to packet data, be sure that the data is present in 234 * the packet buffer. They should probably do those checks anyway, 235 * as other data at that layer might not be IP addresses, and it 236 * also needs to check whether they're present in the packet buffer. 237 */ 238const char * 239getname(netdissect_options *ndo, const u_char *ap) 240{ 241 register struct hostent *hp; 242 uint32_t addr; 243 struct hnamemem *p; 244 245 memcpy(&addr, ap, sizeof(addr)); 246 p = &hnametable[addr & (HASHNAMESIZE-1)]; 247 for (; p->nxt; p = p->nxt) { 248 if (p->addr == addr) 249 return (p->name); 250 } 251 p->addr = addr; 252 p->nxt = newhnamemem(ndo); 253 254 /* 255 * Print names unless: 256 * (1) -n was given. 257 * (2) Address is foreign and -f was given. (If -f was not 258 * given, f_netmask and f_localnet are 0 and the test 259 * evaluates to true) 260 */ 261 if (!ndo->ndo_nflag && 262 (addr & f_netmask) == f_localnet) { 263#ifdef HAVE_CASPER 264 if (capdns != NULL) { 265 hp = cap_gethostbyaddr(capdns, (char *)&addr, 4, 266 AF_INET); 267 } else 268#endif 269 hp = gethostbyaddr((char *)&addr, 4, AF_INET); 270 if (hp) { 271 char *dotp; 272 273 p->name = strdup(hp->h_name); 274 if (p->name == NULL) 275 (*ndo->ndo_error)(ndo, 276 "getname: strdup(hp->h_name)"); 277 if (ndo->ndo_Nflag) { 278 /* Remove domain qualifications */ 279 dotp = strchr(p->name, '.'); 280 if (dotp) 281 *dotp = '\0'; 282 } 283 return (p->name); 284 } 285 } 286 p->name = strdup(intoa(addr)); 287 if (p->name == NULL) 288 (*ndo->ndo_error)(ndo, "getname: strdup(intoa(addr))"); 289 return (p->name); 290} 291 292/* 293 * Return a name for the IP6 address pointed to by ap. This address 294 * is assumed to be in network byte order. 295 */ 296const char * 297getname6(netdissect_options *ndo, const u_char *ap) 298{ 299 register struct hostent *hp; 300 union { 301 struct in6_addr addr; 302 struct for_hash_addr { 303 char fill[14]; 304 uint16_t d; 305 } addra; 306 } addr; 307 struct h6namemem *p; 308 register const char *cp; 309 char ntop_buf[INET6_ADDRSTRLEN]; 310 311 memcpy(&addr, ap, sizeof(addr)); 312 p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)]; 313 for (; p->nxt; p = p->nxt) { 314 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0) 315 return (p->name); 316 } 317 p->addr = addr.addr; 318 p->nxt = newh6namemem(ndo); 319 320 /* 321 * Do not print names if -n was given. 322 */ 323 if (!ndo->ndo_nflag) { 324#ifdef HAVE_CASPER 325 if (capdns != NULL) { 326 hp = cap_gethostbyaddr(capdns, (char *)&addr, 327 sizeof(addr), AF_INET6); 328 } else 329#endif 330 hp = gethostbyaddr((char *)&addr, sizeof(addr), 331 AF_INET6); 332 if (hp) { 333 char *dotp; 334 335 p->name = strdup(hp->h_name); 336 if (p->name == NULL) 337 (*ndo->ndo_error)(ndo, 338 "getname6: strdup(hp->h_name)"); 339 if (ndo->ndo_Nflag) { 340 /* Remove domain qualifications */ 341 dotp = strchr(p->name, '.'); 342 if (dotp) 343 *dotp = '\0'; 344 } 345 return (p->name); 346 } 347 } 348 cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf)); 349 p->name = strdup(cp); 350 if (p->name == NULL) 351 (*ndo->ndo_error)(ndo, "getname6: strdup(cp)"); 352 return (p->name); 353} 354 355static const char hex[16] = "0123456789abcdef"; 356 357 358/* Find the hash node that corresponds the ether address 'ep' */ 359 360static inline struct enamemem * 361lookup_emem(netdissect_options *ndo, const u_char *ep) 362{ 363 register u_int i, j, k; 364 struct enamemem *tp; 365 366 k = (ep[0] << 8) | ep[1]; 367 j = (ep[2] << 8) | ep[3]; 368 i = (ep[4] << 8) | ep[5]; 369 370 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)]; 371 while (tp->e_nxt) 372 if (tp->e_addr0 == i && 373 tp->e_addr1 == j && 374 tp->e_addr2 == k) 375 return tp; 376 else 377 tp = tp->e_nxt; 378 tp->e_addr0 = i; 379 tp->e_addr1 = j; 380 tp->e_addr2 = k; 381 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 382 if (tp->e_nxt == NULL) 383 (*ndo->ndo_error)(ndo, "lookup_emem: calloc"); 384 385 return tp; 386} 387 388/* 389 * Find the hash node that corresponds to the bytestring 'bs' 390 * with length 'nlen' 391 */ 392 393static inline struct bsnamemem * 394lookup_bytestring(netdissect_options *ndo, register const u_char *bs, 395 const unsigned int nlen) 396{ 397 struct bsnamemem *tp; 398 register u_int i, j, k; 399 400 if (nlen >= 6) { 401 k = (bs[0] << 8) | bs[1]; 402 j = (bs[2] << 8) | bs[3]; 403 i = (bs[4] << 8) | bs[5]; 404 } else if (nlen >= 4) { 405 k = (bs[0] << 8) | bs[1]; 406 j = (bs[2] << 8) | bs[3]; 407 i = 0; 408 } else 409 i = j = k = 0; 410 411 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)]; 412 while (tp->bs_nxt) 413 if (nlen == tp->bs_nbytes && 414 tp->bs_addr0 == i && 415 tp->bs_addr1 == j && 416 tp->bs_addr2 == k && 417 memcmp((const char *)bs, (const char *)(tp->bs_bytes), nlen) == 0) 418 return tp; 419 else 420 tp = tp->bs_nxt; 421 422 tp->bs_addr0 = i; 423 tp->bs_addr1 = j; 424 tp->bs_addr2 = k; 425 426 tp->bs_bytes = (u_char *) calloc(1, nlen); 427 if (tp->bs_bytes == NULL) 428 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 429 430 memcpy(tp->bs_bytes, bs, nlen); 431 tp->bs_nbytes = nlen; 432 tp->bs_nxt = (struct bsnamemem *)calloc(1, sizeof(*tp)); 433 if (tp->bs_nxt == NULL) 434 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 435 436 return tp; 437} 438 439/* Find the hash node that corresponds the NSAP 'nsap' */ 440 441static inline struct enamemem * 442lookup_nsap(netdissect_options *ndo, register const u_char *nsap, 443 register u_int nsap_length) 444{ 445 register u_int i, j, k; 446 struct enamemem *tp; 447 const u_char *ensap; 448 449 if (nsap_length > 6) { 450 ensap = nsap + nsap_length - 6; 451 k = (ensap[0] << 8) | ensap[1]; 452 j = (ensap[2] << 8) | ensap[3]; 453 i = (ensap[4] << 8) | ensap[5]; 454 } 455 else 456 i = j = k = 0; 457 458 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)]; 459 while (tp->e_nxt) 460 if (nsap_length == tp->e_nsap[0] && 461 tp->e_addr0 == i && 462 tp->e_addr1 == j && 463 tp->e_addr2 == k && 464 memcmp((const char *)nsap, 465 (char *)&(tp->e_nsap[1]), nsap_length) == 0) 466 return tp; 467 else 468 tp = tp->e_nxt; 469 tp->e_addr0 = i; 470 tp->e_addr1 = j; 471 tp->e_addr2 = k; 472 tp->e_nsap = (u_char *)malloc(nsap_length + 1); 473 if (tp->e_nsap == NULL) 474 (*ndo->ndo_error)(ndo, "lookup_nsap: malloc"); 475 tp->e_nsap[0] = (u_char)nsap_length; /* guaranteed < ISONSAP_MAX_LENGTH */ 476 memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length); 477 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 478 if (tp->e_nxt == NULL) 479 (*ndo->ndo_error)(ndo, "lookup_nsap: calloc"); 480 481 return tp; 482} 483 484/* Find the hash node that corresponds the protoid 'pi'. */ 485 486static inline struct protoidmem * 487lookup_protoid(netdissect_options *ndo, const u_char *pi) 488{ 489 register u_int i, j; 490 struct protoidmem *tp; 491 492 /* 5 octets won't be aligned */ 493 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2]; 494 j = (pi[3] << 8) + pi[4]; 495 /* XXX should be endian-insensitive, but do big-endian testing XXX */ 496 497 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)]; 498 while (tp->p_nxt) 499 if (tp->p_oui == i && tp->p_proto == j) 500 return tp; 501 else 502 tp = tp->p_nxt; 503 tp->p_oui = i; 504 tp->p_proto = j; 505 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp)); 506 if (tp->p_nxt == NULL) 507 (*ndo->ndo_error)(ndo, "lookup_protoid: calloc"); 508 509 return tp; 510} 511 512const char * 513etheraddr_string(netdissect_options *ndo, register const u_char *ep) 514{ 515 register int i; 516 register char *cp; 517 register struct enamemem *tp; 518 int oui; 519 char buf[BUFSIZE]; 520 521 tp = lookup_emem(ndo, ep); 522 if (tp->e_name) 523 return (tp->e_name); 524#ifdef USE_ETHER_NTOHOST 525 if (!ndo->ndo_nflag) { 526 char buf2[BUFSIZE]; 527 528 if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) { 529 tp->e_name = strdup(buf2); 530 if (tp->e_name == NULL) 531 (*ndo->ndo_error)(ndo, 532 "etheraddr_string: strdup(buf2)"); 533 return (tp->e_name); 534 } 535 } 536#endif 537 cp = buf; 538 oui = EXTRACT_24BITS(ep); 539 *cp++ = hex[*ep >> 4 ]; 540 *cp++ = hex[*ep++ & 0xf]; 541 for (i = 5; --i >= 0;) { 542 *cp++ = ':'; 543 *cp++ = hex[*ep >> 4 ]; 544 *cp++ = hex[*ep++ & 0xf]; 545 } 546 547 if (!ndo->ndo_nflag) { 548 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)", 549 tok2str(oui_values, "Unknown", oui)); 550 } else 551 *cp = '\0'; 552 tp->e_name = strdup(buf); 553 if (tp->e_name == NULL) 554 (*ndo->ndo_error)(ndo, "etheraddr_string: strdup(buf)"); 555 return (tp->e_name); 556} 557 558const char * 559le64addr_string(netdissect_options *ndo, const u_char *ep) 560{ 561 const unsigned int len = 8; 562 register u_int i; 563 register char *cp; 564 register struct bsnamemem *tp; 565 char buf[BUFSIZE]; 566 567 tp = lookup_bytestring(ndo, ep, len); 568 if (tp->bs_name) 569 return (tp->bs_name); 570 571 cp = buf; 572 for (i = len; i > 0 ; --i) { 573 *cp++ = hex[*(ep + i - 1) >> 4]; 574 *cp++ = hex[*(ep + i - 1) & 0xf]; 575 *cp++ = ':'; 576 } 577 cp --; 578 579 *cp = '\0'; 580 581 tp->bs_name = strdup(buf); 582 if (tp->bs_name == NULL) 583 (*ndo->ndo_error)(ndo, "le64addr_string: strdup(buf)"); 584 585 return (tp->bs_name); 586} 587 588const char * 589linkaddr_string(netdissect_options *ndo, const u_char *ep, 590 const unsigned int type, const unsigned int len) 591{ 592 register u_int i; 593 register char *cp; 594 register struct bsnamemem *tp; 595 596 if (len == 0) 597 return ("<empty>"); 598 599 if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN) 600 return (etheraddr_string(ndo, ep)); 601 602 if (type == LINKADDR_FRELAY) 603 return (q922_string(ndo, ep, len)); 604 605 tp = lookup_bytestring(ndo, ep, len); 606 if (tp->bs_name) 607 return (tp->bs_name); 608 609 tp->bs_name = cp = (char *)malloc(len*3); 610 if (tp->bs_name == NULL) 611 (*ndo->ndo_error)(ndo, "linkaddr_string: malloc"); 612 *cp++ = hex[*ep >> 4]; 613 *cp++ = hex[*ep++ & 0xf]; 614 for (i = len-1; i > 0 ; --i) { 615 *cp++ = ':'; 616 *cp++ = hex[*ep >> 4]; 617 *cp++ = hex[*ep++ & 0xf]; 618 } 619 *cp = '\0'; 620 return (tp->bs_name); 621} 622 623const char * 624etherproto_string(netdissect_options *ndo, u_short port) 625{ 626 register char *cp; 627 register struct hnamemem *tp; 628 register uint32_t i = port; 629 char buf[sizeof("0000")]; 630 631 for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 632 if (tp->addr == i) 633 return (tp->name); 634 635 tp->addr = i; 636 tp->nxt = newhnamemem(ndo); 637 638 cp = buf; 639 NTOHS(port); 640 *cp++ = hex[port >> 12 & 0xf]; 641 *cp++ = hex[port >> 8 & 0xf]; 642 *cp++ = hex[port >> 4 & 0xf]; 643 *cp++ = hex[port & 0xf]; 644 *cp++ = '\0'; 645 tp->name = strdup(buf); 646 if (tp->name == NULL) 647 (*ndo->ndo_error)(ndo, "etherproto_string: strdup(buf)"); 648 return (tp->name); 649} 650 651const char * 652protoid_string(netdissect_options *ndo, register const u_char *pi) 653{ 654 register u_int i, j; 655 register char *cp; 656 register struct protoidmem *tp; 657 char buf[sizeof("00:00:00:00:00")]; 658 659 tp = lookup_protoid(ndo, pi); 660 if (tp->p_name) 661 return tp->p_name; 662 663 cp = buf; 664 if ((j = *pi >> 4) != 0) 665 *cp++ = hex[j]; 666 *cp++ = hex[*pi++ & 0xf]; 667 for (i = 4; (int)--i >= 0;) { 668 *cp++ = ':'; 669 if ((j = *pi >> 4) != 0) 670 *cp++ = hex[j]; 671 *cp++ = hex[*pi++ & 0xf]; 672 } 673 *cp = '\0'; 674 tp->p_name = strdup(buf); 675 if (tp->p_name == NULL) 676 (*ndo->ndo_error)(ndo, "protoid_string: strdup(buf)"); 677 return (tp->p_name); 678} 679 680#define ISONSAP_MAX_LENGTH 20 681const char * 682isonsap_string(netdissect_options *ndo, const u_char *nsap, 683 register u_int nsap_length) 684{ 685 register u_int nsap_idx; 686 register char *cp; 687 register struct enamemem *tp; 688 689 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH) 690 return ("isonsap_string: illegal length"); 691 692 tp = lookup_nsap(ndo, nsap, nsap_length); 693 if (tp->e_name) 694 return tp->e_name; 695 696 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")); 697 if (cp == NULL) 698 (*ndo->ndo_error)(ndo, "isonsap_string: malloc"); 699 700 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) { 701 *cp++ = hex[*nsap >> 4]; 702 *cp++ = hex[*nsap++ & 0xf]; 703 if (((nsap_idx & 1) == 0) && 704 (nsap_idx + 1 < nsap_length)) { 705 *cp++ = '.'; 706 } 707 } 708 *cp = '\0'; 709 return (tp->e_name); 710} 711 712const char * 713tcpport_string(netdissect_options *ndo, u_short port) 714{ 715 register struct hnamemem *tp; 716 register uint32_t i = port; 717 char buf[sizeof("00000")]; 718 719 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 720 if (tp->addr == i) 721 return (tp->name); 722 723 tp->addr = i; 724 tp->nxt = newhnamemem(ndo); 725 726 (void)snprintf(buf, sizeof(buf), "%u", i); 727 tp->name = strdup(buf); 728 if (tp->name == NULL) 729 (*ndo->ndo_error)(ndo, "tcpport_string: strdup(buf)"); 730 return (tp->name); 731} 732 733const char * 734udpport_string(netdissect_options *ndo, register u_short port) 735{ 736 register struct hnamemem *tp; 737 register uint32_t i = port; 738 char buf[sizeof("00000")]; 739 740 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 741 if (tp->addr == i) 742 return (tp->name); 743 744 tp->addr = i; 745 tp->nxt = newhnamemem(ndo); 746 747 (void)snprintf(buf, sizeof(buf), "%u", i); 748 tp->name = strdup(buf); 749 if (tp->name == NULL) 750 (*ndo->ndo_error)(ndo, "udpport_string: strdup(buf)"); 751 return (tp->name); 752} 753 754const char * 755ipxsap_string(netdissect_options *ndo, u_short port) 756{ 757 register char *cp; 758 register struct hnamemem *tp; 759 register uint32_t i = port; 760 char buf[sizeof("0000")]; 761 762 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 763 if (tp->addr == i) 764 return (tp->name); 765 766 tp->addr = i; 767 tp->nxt = newhnamemem(ndo); 768 769 cp = buf; 770 NTOHS(port); 771 *cp++ = hex[port >> 12 & 0xf]; 772 *cp++ = hex[port >> 8 & 0xf]; 773 *cp++ = hex[port >> 4 & 0xf]; 774 *cp++ = hex[port & 0xf]; 775 *cp++ = '\0'; 776 tp->name = strdup(buf); 777 if (tp->name == NULL) 778 (*ndo->ndo_error)(ndo, "ipxsap_string: strdup(buf)"); 779 return (tp->name); 780} 781 782static void 783init_servarray(netdissect_options *ndo) 784{ 785 struct servent *sv; 786 register struct hnamemem *table; 787 register int i; 788 char buf[sizeof("0000000000")]; 789 790 while ((sv = getservent()) != NULL) { 791 int port = ntohs(sv->s_port); 792 i = port & (HASHNAMESIZE-1); 793 if (strcmp(sv->s_proto, "tcp") == 0) 794 table = &tporttable[i]; 795 else if (strcmp(sv->s_proto, "udp") == 0) 796 table = &uporttable[i]; 797 else 798 continue; 799 800 while (table->name) 801 table = table->nxt; 802 if (ndo->ndo_nflag) { 803 (void)snprintf(buf, sizeof(buf), "%d", port); 804 table->name = strdup(buf); 805 } else 806 table->name = strdup(sv->s_name); 807 if (table->name == NULL) 808 (*ndo->ndo_error)(ndo, "init_servarray: strdup"); 809 810 table->addr = port; 811 table->nxt = newhnamemem(ndo); 812 } 813 endservent(); 814} 815 816static const struct eproto { 817 const char *s; 818 u_short p; 819} eproto_db[] = { 820 { "pup", ETHERTYPE_PUP }, 821 { "xns", ETHERTYPE_NS }, 822 { "ip", ETHERTYPE_IP }, 823 { "ip6", ETHERTYPE_IPV6 }, 824 { "arp", ETHERTYPE_ARP }, 825 { "rarp", ETHERTYPE_REVARP }, 826 { "sprite", ETHERTYPE_SPRITE }, 827 { "mopdl", ETHERTYPE_MOPDL }, 828 { "moprc", ETHERTYPE_MOPRC }, 829 { "decnet", ETHERTYPE_DN }, 830 { "lat", ETHERTYPE_LAT }, 831 { "sca", ETHERTYPE_SCA }, 832 { "lanbridge", ETHERTYPE_LANBRIDGE }, 833 { "vexp", ETHERTYPE_VEXP }, 834 { "vprod", ETHERTYPE_VPROD }, 835 { "atalk", ETHERTYPE_ATALK }, 836 { "atalkarp", ETHERTYPE_AARP }, 837 { "loopback", ETHERTYPE_LOOPBACK }, 838 { "decdts", ETHERTYPE_DECDTS }, 839 { "decdns", ETHERTYPE_DECDNS }, 840 { (char *)0, 0 } 841}; 842 843static void 844init_eprotoarray(netdissect_options *ndo) 845{ 846 register int i; 847 register struct hnamemem *table; 848 849 for (i = 0; eproto_db[i].s; i++) { 850 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1); 851 table = &eprototable[j]; 852 while (table->name) 853 table = table->nxt; 854 table->name = eproto_db[i].s; 855 table->addr = htons(eproto_db[i].p); 856 table->nxt = newhnamemem(ndo); 857 } 858} 859 860static const struct protoidlist { 861 const u_char protoid[5]; 862 const char *name; 863} protoidlist[] = { 864 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" }, 865 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" }, 866 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" }, 867 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" }, 868 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" }, 869 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 870}; 871 872/* 873 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet 874 * types. 875 */ 876static void 877init_protoidarray(netdissect_options *ndo) 878{ 879 register int i; 880 register struct protoidmem *tp; 881 const struct protoidlist *pl; 882 u_char protoid[5]; 883 884 protoid[0] = 0; 885 protoid[1] = 0; 886 protoid[2] = 0; 887 for (i = 0; eproto_db[i].s; i++) { 888 u_short etype = htons(eproto_db[i].p); 889 890 memcpy((char *)&protoid[3], (char *)&etype, 2); 891 tp = lookup_protoid(ndo, protoid); 892 tp->p_name = strdup(eproto_db[i].s); 893 if (tp->p_name == NULL) 894 (*ndo->ndo_error)(ndo, 895 "init_protoidarray: strdup(eproto_db[i].s)"); 896 } 897 /* Hardwire some SNAP proto ID names */ 898 for (pl = protoidlist; pl->name != NULL; ++pl) { 899 tp = lookup_protoid(ndo, pl->protoid); 900 /* Don't override existing name */ 901 if (tp->p_name != NULL) 902 continue; 903 904 tp->p_name = pl->name; 905 } 906} 907 908static const struct etherlist { 909 const u_char addr[6]; 910 const char *name; 911} etherlist[] = { 912 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" }, 913 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 914}; 915 916/* 917 * Initialize the ethers hash table. We take two different approaches 918 * depending on whether or not the system provides the ethers name 919 * service. If it does, we just wire in a few names at startup, 920 * and etheraddr_string() fills in the table on demand. If it doesn't, 921 * then we suck in the entire /etc/ethers file at startup. The idea 922 * is that parsing the local file will be fast, but spinning through 923 * all the ethers entries via NIS & next_etherent might be very slow. 924 * 925 * XXX pcap_next_etherent doesn't belong in the pcap interface, but 926 * since the pcap module already does name-to-address translation, 927 * it's already does most of the work for the ethernet address-to-name 928 * translation, so we just pcap_next_etherent as a convenience. 929 */ 930static void 931init_etherarray(netdissect_options *ndo) 932{ 933 register const struct etherlist *el; 934 register struct enamemem *tp; 935#ifdef USE_ETHER_NTOHOST 936 char name[256]; 937#else 938 register struct pcap_etherent *ep; 939 register FILE *fp; 940 941 /* Suck in entire ethers file */ 942 fp = fopen(PCAP_ETHERS_FILE, "r"); 943 if (fp != NULL) { 944 while ((ep = pcap_next_etherent(fp)) != NULL) { 945 tp = lookup_emem(ndo, ep->addr); 946 tp->e_name = strdup(ep->name); 947 if (tp->e_name == NULL) 948 (*ndo->ndo_error)(ndo, 949 "init_etherarray: strdup(ep->addr)"); 950 } 951 (void)fclose(fp); 952 } 953#endif 954 955 /* Hardwire some ethernet names */ 956 for (el = etherlist; el->name != NULL; ++el) { 957 tp = lookup_emem(ndo, el->addr); 958 /* Don't override existing name */ 959 if (tp->e_name != NULL) 960 continue; 961 962#ifdef USE_ETHER_NTOHOST 963 /* 964 * Use YP/NIS version of name if available. 965 */ 966 if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) { 967 tp->e_name = strdup(name); 968 if (tp->e_name == NULL) 969 (*ndo->ndo_error)(ndo, 970 "init_etherarray: strdup(name)"); 971 continue; 972 } 973#endif 974 tp->e_name = el->name; 975 } 976} 977 978static const struct tok ipxsap_db[] = { 979 { 0x0000, "Unknown" }, 980 { 0x0001, "User" }, 981 { 0x0002, "User Group" }, 982 { 0x0003, "PrintQueue" }, 983 { 0x0004, "FileServer" }, 984 { 0x0005, "JobServer" }, 985 { 0x0006, "Gateway" }, 986 { 0x0007, "PrintServer" }, 987 { 0x0008, "ArchiveQueue" }, 988 { 0x0009, "ArchiveServer" }, 989 { 0x000a, "JobQueue" }, 990 { 0x000b, "Administration" }, 991 { 0x000F, "Novell TI-RPC" }, 992 { 0x0017, "Diagnostics" }, 993 { 0x0020, "NetBIOS" }, 994 { 0x0021, "NAS SNA Gateway" }, 995 { 0x0023, "NACS AsyncGateway" }, 996 { 0x0024, "RemoteBridge/RoutingService" }, 997 { 0x0026, "BridgeServer" }, 998 { 0x0027, "TCP/IP Gateway" }, 999 { 0x0028, "Point-to-point X.25 BridgeServer" }, 1000 { 0x0029, "3270 Gateway" }, 1001 { 0x002a, "CHI Corp" }, 1002 { 0x002c, "PC Chalkboard" }, 1003 { 0x002d, "TimeSynchServer" }, 1004 { 0x002e, "ARCserve5.0/PalindromeBackup" }, 1005 { 0x0045, "DI3270 Gateway" }, 1006 { 0x0047, "AdvertisingPrintServer" }, 1007 { 0x004a, "NetBlazerModems" }, 1008 { 0x004b, "BtrieveVAP" }, 1009 { 0x004c, "NetwareSQL" }, 1010 { 0x004d, "XtreeNetwork" }, 1011 { 0x0050, "BtrieveVAP4.11" }, 1012 { 0x0052, "QuickLink" }, 1013 { 0x0053, "PrintQueueUser" }, 1014 { 0x0058, "Multipoint X.25 Router" }, 1015 { 0x0060, "STLB/NLM" }, 1016 { 0x0064, "ARCserve" }, 1017 { 0x0066, "ARCserve3.0" }, 1018 { 0x0072, "WAN CopyUtility" }, 1019 { 0x007a, "TES-NetwareVMS" }, 1020 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" }, 1021 { 0x0095, "DDA OBGYN" }, 1022 { 0x0098, "NetwareAccessServer" }, 1023 { 0x009a, "Netware for VMS II/NamedPipeServer" }, 1024 { 0x009b, "NetwareAccessServer" }, 1025 { 0x009e, "PortableNetwareServer/SunLinkNVT" }, 1026 { 0x00a1, "PowerchuteAPC UPS" }, 1027 { 0x00aa, "LAWserve" }, 1028 { 0x00ac, "CompaqIDA StatusMonitor" }, 1029 { 0x0100, "PIPE STAIL" }, 1030 { 0x0102, "LAN ProtectBindery" }, 1031 { 0x0103, "OracleDataBaseServer" }, 1032 { 0x0107, "Netware386/RSPX RemoteConsole" }, 1033 { 0x010f, "NovellSNA Gateway" }, 1034 { 0x0111, "TestServer" }, 1035 { 0x0112, "HP PrintServer" }, 1036 { 0x0114, "CSA MUX" }, 1037 { 0x0115, "CSA LCA" }, 1038 { 0x0116, "CSA CM" }, 1039 { 0x0117, "CSA SMA" }, 1040 { 0x0118, "CSA DBA" }, 1041 { 0x0119, "CSA NMA" }, 1042 { 0x011a, "CSA SSA" }, 1043 { 0x011b, "CSA STATUS" }, 1044 { 0x011e, "CSA APPC" }, 1045 { 0x0126, "SNA TEST SSA Profile" }, 1046 { 0x012a, "CSA TRACE" }, 1047 { 0x012b, "NetwareSAA" }, 1048 { 0x012e, "IKARUS VirusScan" }, 1049 { 0x0130, "CommunicationsExecutive" }, 1050 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" }, 1051 { 0x0135, "NetwareNamingServicesProfile" }, 1052 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" }, 1053 { 0x0141, "LAN SpoolServer" }, 1054 { 0x0152, "IRMALAN Gateway" }, 1055 { 0x0154, "NamedPipeServer" }, 1056 { 0x0166, "NetWareManagement" }, 1057 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" }, 1058 { 0x0173, "Compaq" }, 1059 { 0x0174, "Compaq SNMP Agent" }, 1060 { 0x0175, "Compaq" }, 1061 { 0x0180, "XTreeServer/XTreeTools" }, 1062 { 0x018A, "NASI ServicesBroadcastServer" }, 1063 { 0x01b0, "GARP Gateway" }, 1064 { 0x01b1, "Binfview" }, 1065 { 0x01bf, "IntelLanDeskManager" }, 1066 { 0x01ca, "AXTEC" }, 1067 { 0x01cb, "ShivaNetModem/E" }, 1068 { 0x01cc, "ShivaLanRover/E" }, 1069 { 0x01cd, "ShivaLanRover/T" }, 1070 { 0x01ce, "ShivaUniversal" }, 1071 { 0x01d8, "CastelleFAXPressServer" }, 1072 { 0x01da, "CastelleLANPressPrintServer" }, 1073 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" }, 1074 { 0x01f0, "LEGATO" }, 1075 { 0x01f5, "LEGATO" }, 1076 { 0x0233, "NMS Agent/NetwareManagementAgent" }, 1077 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" }, 1078 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" }, 1079 { 0x023a, "LANtern" }, 1080 { 0x023c, "MAVERICK" }, 1081 { 0x023f, "NovellSMDR" }, 1082 { 0x024e, "NetwareConnect" }, 1083 { 0x024f, "NASI ServerBroadcast Cisco" }, 1084 { 0x026a, "NMS ServiceConsole" }, 1085 { 0x026b, "TimeSynchronizationServer Netware 4.x" }, 1086 { 0x0278, "DirectoryServer Netware 4.x" }, 1087 { 0x027b, "NetwareManagementAgent" }, 1088 { 0x0280, "Novell File and Printer Sharing Service for PC" }, 1089 { 0x0304, "NovellSAA Gateway" }, 1090 { 0x0308, "COM/VERMED" }, 1091 { 0x030a, "GalacticommWorldgroupServer" }, 1092 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" }, 1093 { 0x0320, "AttachmateGateway" }, 1094 { 0x0327, "MicrosoftDiagnostiocs" }, 1095 { 0x0328, "WATCOM SQL Server" }, 1096 { 0x0335, "MultiTechSystems MultisynchCommServer" }, 1097 { 0x0343, "Xylogics RemoteAccessServer/LANModem" }, 1098 { 0x0355, "ArcadaBackupExec" }, 1099 { 0x0358, "MSLCD1" }, 1100 { 0x0361, "NETINELO" }, 1101 { 0x037e, "Powerchute UPS Monitoring" }, 1102 { 0x037f, "ViruSafeNotify" }, 1103 { 0x0386, "HP Bridge" }, 1104 { 0x0387, "HP Hub" }, 1105 { 0x0394, "NetWare SAA Gateway" }, 1106 { 0x039b, "LotusNotes" }, 1107 { 0x03b7, "CertusAntiVirus" }, 1108 { 0x03c4, "ARCserve4.0" }, 1109 { 0x03c7, "LANspool3.5" }, 1110 { 0x03d7, "LexmarkPrinterServer" }, 1111 { 0x03d8, "LexmarkXLE PrinterServer" }, 1112 { 0x03dd, "BanyanENS NetwareClient" }, 1113 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" }, 1114 { 0x03e1, "UnivelUnixware" }, 1115 { 0x03e4, "UnivelUnixware" }, 1116 { 0x03fc, "IntelNetport" }, 1117 { 0x03fd, "PrintServerQueue" }, 1118 { 0x040A, "ipnServer" }, 1119 { 0x040D, "LVERRMAN" }, 1120 { 0x040E, "LVLIC" }, 1121 { 0x0414, "NET Silicon (DPI)/Kyocera" }, 1122 { 0x0429, "SiteLockVirus" }, 1123 { 0x0432, "UFHELPR???" }, 1124 { 0x0433, "Synoptics281xAdvancedSNMPAgent" }, 1125 { 0x0444, "MicrosoftNT SNA Server" }, 1126 { 0x0448, "Oracle" }, 1127 { 0x044c, "ARCserve5.01" }, 1128 { 0x0457, "CanonGP55" }, 1129 { 0x045a, "QMS Printers" }, 1130 { 0x045b, "DellSCSI Array" }, 1131 { 0x0491, "NetBlazerModems" }, 1132 { 0x04ac, "OnTimeScheduler" }, 1133 { 0x04b0, "CD-Net" }, 1134 { 0x0513, "EmulexNQA" }, 1135 { 0x0520, "SiteLockChecks" }, 1136 { 0x0529, "SiteLockChecks" }, 1137 { 0x052d, "CitrixOS2 AppServer" }, 1138 { 0x0535, "Tektronix" }, 1139 { 0x0536, "Milan" }, 1140 { 0x055d, "Attachmate SNA gateway" }, 1141 { 0x056b, "IBM8235 ModemServer" }, 1142 { 0x056c, "ShivaLanRover/E PLUS" }, 1143 { 0x056d, "ShivaLanRover/T PLUS" }, 1144 { 0x0580, "McAfeeNetShield" }, 1145 { 0x05B8, "NLM to workstation communication (Revelation Software)" }, 1146 { 0x05BA, "CompatibleSystemsRouters" }, 1147 { 0x05BE, "CheyenneHierarchicalStorageManager" }, 1148 { 0x0606, "JCWatermarkImaging" }, 1149 { 0x060c, "AXISNetworkPrinter" }, 1150 { 0x0610, "AdaptecSCSIManagement" }, 1151 { 0x0621, "IBM AntiVirus" }, 1152 { 0x0640, "Windows95 RemoteRegistryService" }, 1153 { 0x064e, "MicrosoftIIS" }, 1154 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1155 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1156 { 0x076C, "Xerox" }, 1157 { 0x079b, "ShivaLanRover/E 115" }, 1158 { 0x079c, "ShivaLanRover/T 115" }, 1159 { 0x07B4, "CubixWorldDesk" }, 1160 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" }, 1161 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" }, 1162 { 0x0810, "ELAN License Server Demo" }, 1163 { 0x0824, "ShivaLanRoverAccessSwitch/E" }, 1164 { 0x086a, "ISSC Collector" }, 1165 { 0x087f, "ISSC DAS AgentAIX" }, 1166 { 0x0880, "Intel Netport PRO" }, 1167 { 0x0881, "Intel Netport PRO" }, 1168 { 0x0b29, "SiteLock" }, 1169 { 0x0c29, "SiteLockApplications" }, 1170 { 0x0c2c, "LicensingServer" }, 1171 { 0x2101, "PerformanceTechnologyInstantInternet" }, 1172 { 0x2380, "LAI SiteLock" }, 1173 { 0x238c, "MeetingMaker" }, 1174 { 0x4808, "SiteLockServer/SiteLockMetering" }, 1175 { 0x5555, "SiteLockUser" }, 1176 { 0x6312, "Tapeware" }, 1177 { 0x6f00, "RabbitGateway" }, 1178 { 0x7703, "MODEM" }, 1179 { 0x8002, "NetPortPrinters" }, 1180 { 0x8008, "WordPerfectNetworkVersion" }, 1181 { 0x85BE, "Cisco EIGRP" }, 1182 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" }, 1183 { 0x9000, "McAfeeNetShield" }, 1184 { 0x9604, "CSA-NT_MON" }, 1185 { 0xb6a8, "OceanIsleReachoutRemoteControl" }, 1186 { 0xf11f, "SiteLockMetering" }, 1187 { 0xf1ff, "SiteLock" }, 1188 { 0xf503, "Microsoft SQL Server" }, 1189 { 0xF905, "IBM TimeAndPlace" }, 1190 { 0xfbfb, "TopCallIII FaxServer" }, 1191 { 0xffff, "AnyService/Wildcard" }, 1192 { 0, (char *)0 } 1193}; 1194 1195static void 1196init_ipxsaparray(netdissect_options *ndo) 1197{ 1198 register int i; 1199 register struct hnamemem *table; 1200 1201 for (i = 0; ipxsap_db[i].s != NULL; i++) { 1202 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1); 1203 table = &ipxsaptable[j]; 1204 while (table->name) 1205 table = table->nxt; 1206 table->name = ipxsap_db[i].s; 1207 table->addr = htons(ipxsap_db[i].v); 1208 table->nxt = newhnamemem(ndo); 1209 } 1210} 1211 1212/* 1213 * Initialize the address to name translation machinery. We map all 1214 * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true 1215 * (i.e., to prevent blocking on the nameserver). localnet is the IP address 1216 * of the local network. mask is its subnet mask. 1217 */ 1218void 1219init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask) 1220{ 1221 if (ndo->ndo_fflag) { 1222 f_localnet = localnet; 1223 f_netmask = mask; 1224 } 1225 if (ndo->ndo_nflag) 1226 /* 1227 * Simplest way to suppress names. 1228 */ 1229 return; 1230 1231 init_etherarray(ndo); 1232 init_servarray(ndo); 1233 init_eprotoarray(ndo); 1234 init_protoidarray(ndo); 1235 init_ipxsaparray(ndo); 1236} 1237 1238const char * 1239dnaddr_string(netdissect_options *ndo, u_short dnaddr) 1240{ 1241 register struct hnamemem *tp; 1242 1243 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL; 1244 tp = tp->nxt) 1245 if (tp->addr == dnaddr) 1246 return (tp->name); 1247 1248 tp->addr = dnaddr; 1249 tp->nxt = newhnamemem(ndo); 1250 tp->name = dnnum_string(ndo, dnaddr); 1251 1252 return(tp->name); 1253} 1254 1255/* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */ 1256struct hnamemem * 1257newhnamemem(netdissect_options *ndo) 1258{ 1259 register struct hnamemem *p; 1260 static struct hnamemem *ptr = NULL; 1261 static u_int num = 0; 1262 1263 if (num <= 0) { 1264 num = 64; 1265 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr)); 1266 if (ptr == NULL) 1267 (*ndo->ndo_error)(ndo, "newhnamemem: calloc"); 1268 } 1269 --num; 1270 p = ptr++; 1271 return (p); 1272} 1273 1274/* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */ 1275struct h6namemem * 1276newh6namemem(netdissect_options *ndo) 1277{ 1278 register struct h6namemem *p; 1279 static struct h6namemem *ptr = NULL; 1280 static u_int num = 0; 1281 1282 if (num <= 0) { 1283 num = 64; 1284 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr)); 1285 if (ptr == NULL) 1286 (*ndo->ndo_error)(ndo, "newh6namemem: calloc"); 1287 } 1288 --num; 1289 p = ptr++; 1290 return (p); 1291} 1292 1293/* Represent TCI part of the 802.1Q 4-octet tag as text. */ 1294const char * 1295ieee8021q_tci_string(const uint16_t tci) 1296{ 1297 static char buf[128]; 1298 snprintf(buf, sizeof(buf), "vlan %u, p %u%s", 1299 tci & 0xfff, 1300 tci >> 13, 1301 (tci & 0x1000) ? ", DEI" : ""); 1302 return buf; 1303} 1304