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 38 struct mbuf; /* Squelch compiler warnings on some platforms for */ 39 struct 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 49 struct ether_addr { 50 unsigned char ether_addr_octet[6]; 51 }; 52 #endif 53 extern 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 86 struct hnamemem { 87 uint32_t addr; 88 const char *name; 89 struct hnamemem *nxt; 90 }; 91 92 static struct hnamemem hnametable[HASHNAMESIZE]; 93 static struct hnamemem tporttable[HASHNAMESIZE]; 94 static struct hnamemem uporttable[HASHNAMESIZE]; 95 static struct hnamemem eprototable[HASHNAMESIZE]; 96 static struct hnamemem dnaddrtable[HASHNAMESIZE]; 97 static 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 */ 107 static struct hostent * 108 win32_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 strcpy(host.h_name, hname); 129 return &host; 130 } 131 break; 132 default: 133 return NULL; 134 } 135 } 136 #define gethostbyaddr win32_gethostbyaddr 137 #endif /* _WIN32 */ 138 139 struct h6namemem { 140 struct in6_addr addr; 141 char *name; 142 struct h6namemem *nxt; 143 }; 144 145 static struct h6namemem h6nametable[HASHNAMESIZE]; 146 147 struct 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 #define e_bs e_nsap /* for bytestringtable */ 154 struct enamemem *e_nxt; 155 }; 156 157 static struct enamemem enametable[HASHNAMESIZE]; 158 static struct enamemem nsaptable[HASHNAMESIZE]; 159 static struct enamemem bytestringtable[HASHNAMESIZE]; 160 161 struct protoidmem { 162 uint32_t p_oui; 163 u_short p_proto; 164 const char *p_name; 165 struct protoidmem *p_nxt; 166 }; 167 168 static struct protoidmem protoidtable[HASHNAMESIZE]; 169 170 /* 171 * A faster replacement for inet_ntoa(). 172 */ 173 const char * 174 intoa(uint32_t addr) 175 { 176 register char *cp; 177 register u_int byte; 178 register int n; 179 static char buf[sizeof(".xxx.xxx.xxx.xxx")]; 180 181 NTOHL(addr); 182 cp = buf + sizeof(buf); 183 *--cp = '\0'; 184 185 n = 4; 186 do { 187 byte = addr & 0xff; 188 *--cp = byte % 10 + '0'; 189 byte /= 10; 190 if (byte > 0) { 191 *--cp = byte % 10 + '0'; 192 byte /= 10; 193 if (byte > 0) 194 *--cp = byte + '0'; 195 } 196 *--cp = '.'; 197 addr >>= 8; 198 } while (--n > 0); 199 200 return cp + 1; 201 } 202 203 static uint32_t f_netmask; 204 static uint32_t f_localnet; 205 #ifdef HAVE_CASPER 206 extern cap_channel_t *capdns; 207 #endif 208 209 /* 210 * Return a name for the IP address pointed to by ap. This address 211 * is assumed to be in network byte order. 212 * 213 * NOTE: ap is *NOT* necessarily part of the packet data (not even if 214 * this is being called with the "ipaddr_string()" macro), so you 215 * *CANNOT* use the ND_TCHECK{2}/ND_TTEST{2} macros on it. Furthermore, 216 * even in cases where it *is* part of the packet data, the caller 217 * would still have to check for a null return value, even if it's 218 * just printing the return value with "%s" - not all versions of 219 * printf print "(null)" with "%s" and a null pointer, some of them 220 * don't check for a null pointer and crash in that case. 221 * 222 * The callers of this routine should, before handing this routine 223 * a pointer to packet data, be sure that the data is present in 224 * the packet buffer. They should probably do those checks anyway, 225 * as other data at that layer might not be IP addresses, and it 226 * also needs to check whether they're present in the packet buffer. 227 */ 228 const char * 229 getname(netdissect_options *ndo, const u_char *ap) 230 { 231 register struct hostent *hp; 232 uint32_t addr; 233 struct hnamemem *p; 234 235 memcpy(&addr, ap, sizeof(addr)); 236 p = &hnametable[addr & (HASHNAMESIZE-1)]; 237 for (; p->nxt; p = p->nxt) { 238 if (p->addr == addr) 239 return (p->name); 240 } 241 p->addr = addr; 242 p->nxt = newhnamemem(ndo); 243 244 /* 245 * Print names unless: 246 * (1) -n was given. 247 * (2) Address is foreign and -f was given. (If -f was not 248 * given, f_netmask and f_localnet are 0 and the test 249 * evaluates to true) 250 */ 251 if (!ndo->ndo_nflag && 252 (addr & f_netmask) == f_localnet) { 253 #ifdef HAVE_CASPER 254 if (capdns != NULL) { 255 hp = cap_gethostbyaddr(capdns, (char *)&addr, 4, 256 AF_INET); 257 } else 258 #endif 259 hp = gethostbyaddr((char *)&addr, 4, AF_INET); 260 if (hp) { 261 char *dotp; 262 263 p->name = strdup(hp->h_name); 264 if (p->name == NULL) 265 (*ndo->ndo_error)(ndo, 266 "getname: strdup(hp->h_name)"); 267 if (ndo->ndo_Nflag) { 268 /* Remove domain qualifications */ 269 dotp = strchr(p->name, '.'); 270 if (dotp) 271 *dotp = '\0'; 272 } 273 return (p->name); 274 } 275 } 276 p->name = strdup(intoa(addr)); 277 if (p->name == NULL) 278 (*ndo->ndo_error)(ndo, "getname: strdup(intoa(addr))"); 279 return (p->name); 280 } 281 282 /* 283 * Return a name for the IP6 address pointed to by ap. This address 284 * is assumed to be in network byte order. 285 */ 286 const char * 287 getname6(netdissect_options *ndo, const u_char *ap) 288 { 289 register struct hostent *hp; 290 union { 291 struct in6_addr addr; 292 struct for_hash_addr { 293 char fill[14]; 294 uint16_t d; 295 } addra; 296 } addr; 297 struct h6namemem *p; 298 register const char *cp; 299 char ntop_buf[INET6_ADDRSTRLEN]; 300 301 memcpy(&addr, ap, sizeof(addr)); 302 p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)]; 303 for (; p->nxt; p = p->nxt) { 304 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0) 305 return (p->name); 306 } 307 p->addr = addr.addr; 308 p->nxt = newh6namemem(ndo); 309 310 /* 311 * Do not print names if -n was given. 312 */ 313 if (!ndo->ndo_nflag) { 314 #ifdef HAVE_CASPER 315 if (capdns != NULL) { 316 hp = cap_gethostbyaddr(capdns, (char *)&addr, 317 sizeof(addr), AF_INET6); 318 } else 319 #endif 320 hp = gethostbyaddr((char *)&addr, sizeof(addr), 321 AF_INET6); 322 if (hp) { 323 char *dotp; 324 325 p->name = strdup(hp->h_name); 326 if (p->name == NULL) 327 (*ndo->ndo_error)(ndo, 328 "getname6: strdup(hp->h_name)"); 329 if (ndo->ndo_Nflag) { 330 /* Remove domain qualifications */ 331 dotp = strchr(p->name, '.'); 332 if (dotp) 333 *dotp = '\0'; 334 } 335 return (p->name); 336 } 337 } 338 cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf)); 339 p->name = strdup(cp); 340 if (p->name == NULL) 341 (*ndo->ndo_error)(ndo, "getname6: strdup(cp)"); 342 return (p->name); 343 } 344 345 static const char hex[] = "0123456789abcdef"; 346 347 348 /* Find the hash node that corresponds the ether address 'ep' */ 349 350 static inline struct enamemem * 351 lookup_emem(netdissect_options *ndo, const u_char *ep) 352 { 353 register u_int i, j, k; 354 struct enamemem *tp; 355 356 k = (ep[0] << 8) | ep[1]; 357 j = (ep[2] << 8) | ep[3]; 358 i = (ep[4] << 8) | ep[5]; 359 360 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)]; 361 while (tp->e_nxt) 362 if (tp->e_addr0 == i && 363 tp->e_addr1 == j && 364 tp->e_addr2 == k) 365 return tp; 366 else 367 tp = tp->e_nxt; 368 tp->e_addr0 = i; 369 tp->e_addr1 = j; 370 tp->e_addr2 = k; 371 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 372 if (tp->e_nxt == NULL) 373 (*ndo->ndo_error)(ndo, "lookup_emem: calloc"); 374 375 return tp; 376 } 377 378 /* 379 * Find the hash node that corresponds to the bytestring 'bs' 380 * with length 'nlen' 381 */ 382 383 static inline struct enamemem * 384 lookup_bytestring(netdissect_options *ndo, register const u_char *bs, 385 const unsigned int nlen) 386 { 387 struct enamemem *tp; 388 register u_int i, j, k; 389 390 if (nlen >= 6) { 391 k = (bs[0] << 8) | bs[1]; 392 j = (bs[2] << 8) | bs[3]; 393 i = (bs[4] << 8) | bs[5]; 394 } else if (nlen >= 4) { 395 k = (bs[0] << 8) | bs[1]; 396 j = (bs[2] << 8) | bs[3]; 397 i = 0; 398 } else 399 i = j = k = 0; 400 401 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)]; 402 while (tp->e_nxt) 403 if (tp->e_addr0 == i && 404 tp->e_addr1 == j && 405 tp->e_addr2 == k && 406 memcmp((const char *)bs, (const char *)(tp->e_bs), nlen) == 0) 407 return tp; 408 else 409 tp = tp->e_nxt; 410 411 tp->e_addr0 = i; 412 tp->e_addr1 = j; 413 tp->e_addr2 = k; 414 415 tp->e_bs = (u_char *) calloc(1, nlen + 1); 416 if (tp->e_bs == NULL) 417 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 418 419 memcpy(tp->e_bs, bs, nlen); 420 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 421 if (tp->e_nxt == NULL) 422 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 423 424 return tp; 425 } 426 427 /* Find the hash node that corresponds the NSAP 'nsap' */ 428 429 static inline struct enamemem * 430 lookup_nsap(netdissect_options *ndo, register const u_char *nsap, 431 register u_int nsap_length) 432 { 433 register u_int i, j, k; 434 struct enamemem *tp; 435 const u_char *ensap; 436 437 if (nsap_length > 6) { 438 ensap = nsap + nsap_length - 6; 439 k = (ensap[0] << 8) | ensap[1]; 440 j = (ensap[2] << 8) | ensap[3]; 441 i = (ensap[4] << 8) | ensap[5]; 442 } 443 else 444 i = j = k = 0; 445 446 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)]; 447 while (tp->e_nxt) 448 if (tp->e_addr0 == i && 449 tp->e_addr1 == j && 450 tp->e_addr2 == k && 451 tp->e_nsap[0] == nsap_length && 452 memcmp((const char *)&(nsap[1]), 453 (char *)&(tp->e_nsap[1]), nsap_length) == 0) 454 return tp; 455 else 456 tp = tp->e_nxt; 457 tp->e_addr0 = i; 458 tp->e_addr1 = j; 459 tp->e_addr2 = k; 460 tp->e_nsap = (u_char *)malloc(nsap_length + 1); 461 if (tp->e_nsap == NULL) 462 (*ndo->ndo_error)(ndo, "lookup_nsap: malloc"); 463 tp->e_nsap[0] = (u_char)nsap_length; /* guaranteed < ISONSAP_MAX_LENGTH */ 464 memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length); 465 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 466 if (tp->e_nxt == NULL) 467 (*ndo->ndo_error)(ndo, "lookup_nsap: calloc"); 468 469 return tp; 470 } 471 472 /* Find the hash node that corresponds the protoid 'pi'. */ 473 474 static inline struct protoidmem * 475 lookup_protoid(netdissect_options *ndo, const u_char *pi) 476 { 477 register u_int i, j; 478 struct protoidmem *tp; 479 480 /* 5 octets won't be aligned */ 481 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2]; 482 j = (pi[3] << 8) + pi[4]; 483 /* XXX should be endian-insensitive, but do big-endian testing XXX */ 484 485 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)]; 486 while (tp->p_nxt) 487 if (tp->p_oui == i && tp->p_proto == j) 488 return tp; 489 else 490 tp = tp->p_nxt; 491 tp->p_oui = i; 492 tp->p_proto = j; 493 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp)); 494 if (tp->p_nxt == NULL) 495 (*ndo->ndo_error)(ndo, "lookup_protoid: calloc"); 496 497 return tp; 498 } 499 500 const char * 501 etheraddr_string(netdissect_options *ndo, register const u_char *ep) 502 { 503 register int i; 504 register char *cp; 505 register struct enamemem *tp; 506 int oui; 507 char buf[BUFSIZE]; 508 509 tp = lookup_emem(ndo, ep); 510 if (tp->e_name) 511 return (tp->e_name); 512 #ifdef USE_ETHER_NTOHOST 513 if (!ndo->ndo_nflag) { 514 char buf2[BUFSIZE]; 515 516 if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) { 517 tp->e_name = strdup(buf2); 518 if (tp->e_name == NULL) 519 (*ndo->ndo_error)(ndo, 520 "etheraddr_string: strdup(buf2)"); 521 return (tp->e_name); 522 } 523 } 524 #endif 525 cp = buf; 526 oui = EXTRACT_24BITS(ep); 527 *cp++ = hex[*ep >> 4 ]; 528 *cp++ = hex[*ep++ & 0xf]; 529 for (i = 5; --i >= 0;) { 530 *cp++ = ':'; 531 *cp++ = hex[*ep >> 4 ]; 532 *cp++ = hex[*ep++ & 0xf]; 533 } 534 535 if (!ndo->ndo_nflag) { 536 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)", 537 tok2str(oui_values, "Unknown", oui)); 538 } else 539 *cp = '\0'; 540 tp->e_name = strdup(buf); 541 if (tp->e_name == NULL) 542 (*ndo->ndo_error)(ndo, "etheraddr_string: strdup(buf)"); 543 return (tp->e_name); 544 } 545 546 const char * 547 le64addr_string(netdissect_options *ndo, const u_char *ep) 548 { 549 const unsigned int len = 8; 550 register u_int i; 551 register char *cp; 552 register struct enamemem *tp; 553 char buf[BUFSIZE]; 554 555 tp = lookup_bytestring(ndo, ep, len); 556 if (tp->e_name) 557 return (tp->e_name); 558 559 cp = buf; 560 for (i = len; i > 0 ; --i) { 561 *cp++ = hex[*(ep + i - 1) >> 4]; 562 *cp++ = hex[*(ep + i - 1) & 0xf]; 563 *cp++ = ':'; 564 } 565 cp --; 566 567 *cp = '\0'; 568 569 tp->e_name = strdup(buf); 570 if (tp->e_name == NULL) 571 (*ndo->ndo_error)(ndo, "le64addr_string: strdup(buf)"); 572 573 return (tp->e_name); 574 } 575 576 const char * 577 linkaddr_string(netdissect_options *ndo, const u_char *ep, 578 const unsigned int type, const unsigned int len) 579 { 580 register u_int i; 581 register char *cp; 582 register struct enamemem *tp; 583 584 if (len == 0) 585 return ("<empty>"); 586 587 if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN) 588 return (etheraddr_string(ndo, ep)); 589 590 if (type == LINKADDR_FRELAY) 591 return (q922_string(ndo, ep, len)); 592 593 tp = lookup_bytestring(ndo, ep, len); 594 if (tp->e_name) 595 return (tp->e_name); 596 597 tp->e_name = cp = (char *)malloc(len*3); 598 if (tp->e_name == NULL) 599 (*ndo->ndo_error)(ndo, "linkaddr_string: malloc"); 600 *cp++ = hex[*ep >> 4]; 601 *cp++ = hex[*ep++ & 0xf]; 602 for (i = len-1; i > 0 ; --i) { 603 *cp++ = ':'; 604 *cp++ = hex[*ep >> 4]; 605 *cp++ = hex[*ep++ & 0xf]; 606 } 607 *cp = '\0'; 608 return (tp->e_name); 609 } 610 611 const char * 612 etherproto_string(netdissect_options *ndo, u_short port) 613 { 614 register char *cp; 615 register struct hnamemem *tp; 616 register uint32_t i = port; 617 char buf[sizeof("0000")]; 618 619 for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 620 if (tp->addr == i) 621 return (tp->name); 622 623 tp->addr = i; 624 tp->nxt = newhnamemem(ndo); 625 626 cp = buf; 627 NTOHS(port); 628 *cp++ = hex[port >> 12 & 0xf]; 629 *cp++ = hex[port >> 8 & 0xf]; 630 *cp++ = hex[port >> 4 & 0xf]; 631 *cp++ = hex[port & 0xf]; 632 *cp++ = '\0'; 633 tp->name = strdup(buf); 634 if (tp->name == NULL) 635 (*ndo->ndo_error)(ndo, "etherproto_string: strdup(buf)"); 636 return (tp->name); 637 } 638 639 const char * 640 protoid_string(netdissect_options *ndo, register const u_char *pi) 641 { 642 register u_int i, j; 643 register char *cp; 644 register struct protoidmem *tp; 645 char buf[sizeof("00:00:00:00:00")]; 646 647 tp = lookup_protoid(ndo, pi); 648 if (tp->p_name) 649 return tp->p_name; 650 651 cp = buf; 652 if ((j = *pi >> 4) != 0) 653 *cp++ = hex[j]; 654 *cp++ = hex[*pi++ & 0xf]; 655 for (i = 4; (int)--i >= 0;) { 656 *cp++ = ':'; 657 if ((j = *pi >> 4) != 0) 658 *cp++ = hex[j]; 659 *cp++ = hex[*pi++ & 0xf]; 660 } 661 *cp = '\0'; 662 tp->p_name = strdup(buf); 663 if (tp->p_name == NULL) 664 (*ndo->ndo_error)(ndo, "protoid_string: strdup(buf)"); 665 return (tp->p_name); 666 } 667 668 #define ISONSAP_MAX_LENGTH 20 669 const char * 670 isonsap_string(netdissect_options *ndo, const u_char *nsap, 671 register u_int nsap_length) 672 { 673 register u_int nsap_idx; 674 register char *cp; 675 register struct enamemem *tp; 676 677 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH) 678 return ("isonsap_string: illegal length"); 679 680 tp = lookup_nsap(ndo, nsap, nsap_length); 681 if (tp->e_name) 682 return tp->e_name; 683 684 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")); 685 if (cp == NULL) 686 (*ndo->ndo_error)(ndo, "isonsap_string: malloc"); 687 688 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) { 689 *cp++ = hex[*nsap >> 4]; 690 *cp++ = hex[*nsap++ & 0xf]; 691 if (((nsap_idx & 1) == 0) && 692 (nsap_idx + 1 < nsap_length)) { 693 *cp++ = '.'; 694 } 695 } 696 *cp = '\0'; 697 return (tp->e_name); 698 } 699 700 const char * 701 tcpport_string(netdissect_options *ndo, u_short port) 702 { 703 register struct hnamemem *tp; 704 register uint32_t i = port; 705 char buf[sizeof("00000")]; 706 707 for (tp = &tporttable[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(ndo); 713 714 (void)snprintf(buf, sizeof(buf), "%u", i); 715 tp->name = strdup(buf); 716 if (tp->name == NULL) 717 (*ndo->ndo_error)(ndo, "tcpport_string: strdup(buf)"); 718 return (tp->name); 719 } 720 721 const char * 722 udpport_string(netdissect_options *ndo, register u_short port) 723 { 724 register struct hnamemem *tp; 725 register uint32_t i = port; 726 char buf[sizeof("00000")]; 727 728 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 729 if (tp->addr == i) 730 return (tp->name); 731 732 tp->addr = i; 733 tp->nxt = newhnamemem(ndo); 734 735 (void)snprintf(buf, sizeof(buf), "%u", i); 736 tp->name = strdup(buf); 737 if (tp->name == NULL) 738 (*ndo->ndo_error)(ndo, "udpport_string: strdup(buf)"); 739 return (tp->name); 740 } 741 742 const char * 743 ipxsap_string(netdissect_options *ndo, u_short port) 744 { 745 register char *cp; 746 register struct hnamemem *tp; 747 register uint32_t i = port; 748 char buf[sizeof("0000")]; 749 750 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 751 if (tp->addr == i) 752 return (tp->name); 753 754 tp->addr = i; 755 tp->nxt = newhnamemem(ndo); 756 757 cp = buf; 758 NTOHS(port); 759 *cp++ = hex[port >> 12 & 0xf]; 760 *cp++ = hex[port >> 8 & 0xf]; 761 *cp++ = hex[port >> 4 & 0xf]; 762 *cp++ = hex[port & 0xf]; 763 *cp++ = '\0'; 764 tp->name = strdup(buf); 765 if (tp->name == NULL) 766 (*ndo->ndo_error)(ndo, "ipxsap_string: strdup(buf)"); 767 return (tp->name); 768 } 769 770 static void 771 init_servarray(netdissect_options *ndo) 772 { 773 struct servent *sv; 774 register struct hnamemem *table; 775 register int i; 776 char buf[sizeof("0000000000")]; 777 778 while ((sv = getservent()) != NULL) { 779 int port = ntohs(sv->s_port); 780 i = port & (HASHNAMESIZE-1); 781 if (strcmp(sv->s_proto, "tcp") == 0) 782 table = &tporttable[i]; 783 else if (strcmp(sv->s_proto, "udp") == 0) 784 table = &uporttable[i]; 785 else 786 continue; 787 788 while (table->name) 789 table = table->nxt; 790 if (ndo->ndo_nflag) { 791 (void)snprintf(buf, sizeof(buf), "%d", port); 792 table->name = strdup(buf); 793 } else 794 table->name = strdup(sv->s_name); 795 if (table->name == NULL) 796 (*ndo->ndo_error)(ndo, "init_servarray: strdup"); 797 798 table->addr = port; 799 table->nxt = newhnamemem(ndo); 800 } 801 endservent(); 802 } 803 804 static const struct eproto { 805 const char *s; 806 u_short p; 807 } eproto_db[] = { 808 { "pup", ETHERTYPE_PUP }, 809 { "xns", ETHERTYPE_NS }, 810 { "ip", ETHERTYPE_IP }, 811 { "ip6", ETHERTYPE_IPV6 }, 812 { "arp", ETHERTYPE_ARP }, 813 { "rarp", ETHERTYPE_REVARP }, 814 { "sprite", ETHERTYPE_SPRITE }, 815 { "mopdl", ETHERTYPE_MOPDL }, 816 { "moprc", ETHERTYPE_MOPRC }, 817 { "decnet", ETHERTYPE_DN }, 818 { "lat", ETHERTYPE_LAT }, 819 { "sca", ETHERTYPE_SCA }, 820 { "lanbridge", ETHERTYPE_LANBRIDGE }, 821 { "vexp", ETHERTYPE_VEXP }, 822 { "vprod", ETHERTYPE_VPROD }, 823 { "atalk", ETHERTYPE_ATALK }, 824 { "atalkarp", ETHERTYPE_AARP }, 825 { "loopback", ETHERTYPE_LOOPBACK }, 826 { "decdts", ETHERTYPE_DECDTS }, 827 { "decdns", ETHERTYPE_DECDNS }, 828 { (char *)0, 0 } 829 }; 830 831 static void 832 init_eprotoarray(netdissect_options *ndo) 833 { 834 register int i; 835 register struct hnamemem *table; 836 837 for (i = 0; eproto_db[i].s; i++) { 838 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1); 839 table = &eprototable[j]; 840 while (table->name) 841 table = table->nxt; 842 table->name = eproto_db[i].s; 843 table->addr = htons(eproto_db[i].p); 844 table->nxt = newhnamemem(ndo); 845 } 846 } 847 848 static const struct protoidlist { 849 const u_char protoid[5]; 850 const char *name; 851 } protoidlist[] = { 852 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" }, 853 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" }, 854 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" }, 855 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" }, 856 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" }, 857 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 858 }; 859 860 /* 861 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet 862 * types. 863 */ 864 static void 865 init_protoidarray(netdissect_options *ndo) 866 { 867 register int i; 868 register struct protoidmem *tp; 869 const struct protoidlist *pl; 870 u_char protoid[5]; 871 872 protoid[0] = 0; 873 protoid[1] = 0; 874 protoid[2] = 0; 875 for (i = 0; eproto_db[i].s; i++) { 876 u_short etype = htons(eproto_db[i].p); 877 878 memcpy((char *)&protoid[3], (char *)&etype, 2); 879 tp = lookup_protoid(ndo, protoid); 880 tp->p_name = strdup(eproto_db[i].s); 881 if (tp->p_name == NULL) 882 (*ndo->ndo_error)(ndo, 883 "init_protoidarray: strdup(eproto_db[i].s)"); 884 } 885 /* Hardwire some SNAP proto ID names */ 886 for (pl = protoidlist; pl->name != NULL; ++pl) { 887 tp = lookup_protoid(ndo, pl->protoid); 888 /* Don't override existing name */ 889 if (tp->p_name != NULL) 890 continue; 891 892 tp->p_name = pl->name; 893 } 894 } 895 896 static const struct etherlist { 897 const u_char addr[6]; 898 const char *name; 899 } etherlist[] = { 900 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" }, 901 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 902 }; 903 904 /* 905 * Initialize the ethers hash table. We take two different approaches 906 * depending on whether or not the system provides the ethers name 907 * service. If it does, we just wire in a few names at startup, 908 * and etheraddr_string() fills in the table on demand. If it doesn't, 909 * then we suck in the entire /etc/ethers file at startup. The idea 910 * is that parsing the local file will be fast, but spinning through 911 * all the ethers entries via NIS & next_etherent might be very slow. 912 * 913 * XXX pcap_next_etherent doesn't belong in the pcap interface, but 914 * since the pcap module already does name-to-address translation, 915 * it's already does most of the work for the ethernet address-to-name 916 * translation, so we just pcap_next_etherent as a convenience. 917 */ 918 static void 919 init_etherarray(netdissect_options *ndo) 920 { 921 register const struct etherlist *el; 922 register struct enamemem *tp; 923 #ifdef USE_ETHER_NTOHOST 924 char name[256]; 925 #else 926 register struct pcap_etherent *ep; 927 register FILE *fp; 928 929 /* Suck in entire ethers file */ 930 fp = fopen(PCAP_ETHERS_FILE, "r"); 931 if (fp != NULL) { 932 while ((ep = pcap_next_etherent(fp)) != NULL) { 933 tp = lookup_emem(ndo, ep->addr); 934 tp->e_name = strdup(ep->name); 935 if (tp->e_name == NULL) 936 (*ndo->ndo_error)(ndo, 937 "init_etherarray: strdup(ep->addr)"); 938 } 939 (void)fclose(fp); 940 } 941 #endif 942 943 /* Hardwire some ethernet names */ 944 for (el = etherlist; el->name != NULL; ++el) { 945 tp = lookup_emem(ndo, el->addr); 946 /* Don't override existing name */ 947 if (tp->e_name != NULL) 948 continue; 949 950 #ifdef USE_ETHER_NTOHOST 951 /* 952 * Use YP/NIS version of name if available. 953 */ 954 if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) { 955 tp->e_name = strdup(name); 956 if (tp->e_name == NULL) 957 (*ndo->ndo_error)(ndo, 958 "init_etherarray: strdup(name)"); 959 continue; 960 } 961 #endif 962 tp->e_name = el->name; 963 } 964 } 965 966 static const struct tok ipxsap_db[] = { 967 { 0x0000, "Unknown" }, 968 { 0x0001, "User" }, 969 { 0x0002, "User Group" }, 970 { 0x0003, "PrintQueue" }, 971 { 0x0004, "FileServer" }, 972 { 0x0005, "JobServer" }, 973 { 0x0006, "Gateway" }, 974 { 0x0007, "PrintServer" }, 975 { 0x0008, "ArchiveQueue" }, 976 { 0x0009, "ArchiveServer" }, 977 { 0x000a, "JobQueue" }, 978 { 0x000b, "Administration" }, 979 { 0x000F, "Novell TI-RPC" }, 980 { 0x0017, "Diagnostics" }, 981 { 0x0020, "NetBIOS" }, 982 { 0x0021, "NAS SNA Gateway" }, 983 { 0x0023, "NACS AsyncGateway" }, 984 { 0x0024, "RemoteBridge/RoutingService" }, 985 { 0x0026, "BridgeServer" }, 986 { 0x0027, "TCP/IP Gateway" }, 987 { 0x0028, "Point-to-point X.25 BridgeServer" }, 988 { 0x0029, "3270 Gateway" }, 989 { 0x002a, "CHI Corp" }, 990 { 0x002c, "PC Chalkboard" }, 991 { 0x002d, "TimeSynchServer" }, 992 { 0x002e, "ARCserve5.0/PalindromeBackup" }, 993 { 0x0045, "DI3270 Gateway" }, 994 { 0x0047, "AdvertisingPrintServer" }, 995 { 0x004a, "NetBlazerModems" }, 996 { 0x004b, "BtrieveVAP" }, 997 { 0x004c, "NetwareSQL" }, 998 { 0x004d, "XtreeNetwork" }, 999 { 0x0050, "BtrieveVAP4.11" }, 1000 { 0x0052, "QuickLink" }, 1001 { 0x0053, "PrintQueueUser" }, 1002 { 0x0058, "Multipoint X.25 Router" }, 1003 { 0x0060, "STLB/NLM" }, 1004 { 0x0064, "ARCserve" }, 1005 { 0x0066, "ARCserve3.0" }, 1006 { 0x0072, "WAN CopyUtility" }, 1007 { 0x007a, "TES-NetwareVMS" }, 1008 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" }, 1009 { 0x0095, "DDA OBGYN" }, 1010 { 0x0098, "NetwareAccessServer" }, 1011 { 0x009a, "Netware for VMS II/NamedPipeServer" }, 1012 { 0x009b, "NetwareAccessServer" }, 1013 { 0x009e, "PortableNetwareServer/SunLinkNVT" }, 1014 { 0x00a1, "PowerchuteAPC UPS" }, 1015 { 0x00aa, "LAWserve" }, 1016 { 0x00ac, "CompaqIDA StatusMonitor" }, 1017 { 0x0100, "PIPE STAIL" }, 1018 { 0x0102, "LAN ProtectBindery" }, 1019 { 0x0103, "OracleDataBaseServer" }, 1020 { 0x0107, "Netware386/RSPX RemoteConsole" }, 1021 { 0x010f, "NovellSNA Gateway" }, 1022 { 0x0111, "TestServer" }, 1023 { 0x0112, "HP PrintServer" }, 1024 { 0x0114, "CSA MUX" }, 1025 { 0x0115, "CSA LCA" }, 1026 { 0x0116, "CSA CM" }, 1027 { 0x0117, "CSA SMA" }, 1028 { 0x0118, "CSA DBA" }, 1029 { 0x0119, "CSA NMA" }, 1030 { 0x011a, "CSA SSA" }, 1031 { 0x011b, "CSA STATUS" }, 1032 { 0x011e, "CSA APPC" }, 1033 { 0x0126, "SNA TEST SSA Profile" }, 1034 { 0x012a, "CSA TRACE" }, 1035 { 0x012b, "NetwareSAA" }, 1036 { 0x012e, "IKARUS VirusScan" }, 1037 { 0x0130, "CommunicationsExecutive" }, 1038 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" }, 1039 { 0x0135, "NetwareNamingServicesProfile" }, 1040 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" }, 1041 { 0x0141, "LAN SpoolServer" }, 1042 { 0x0152, "IRMALAN Gateway" }, 1043 { 0x0154, "NamedPipeServer" }, 1044 { 0x0166, "NetWareManagement" }, 1045 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" }, 1046 { 0x0173, "Compaq" }, 1047 { 0x0174, "Compaq SNMP Agent" }, 1048 { 0x0175, "Compaq" }, 1049 { 0x0180, "XTreeServer/XTreeTools" }, 1050 { 0x018A, "NASI ServicesBroadcastServer" }, 1051 { 0x01b0, "GARP Gateway" }, 1052 { 0x01b1, "Binfview" }, 1053 { 0x01bf, "IntelLanDeskManager" }, 1054 { 0x01ca, "AXTEC" }, 1055 { 0x01cb, "ShivaNetModem/E" }, 1056 { 0x01cc, "ShivaLanRover/E" }, 1057 { 0x01cd, "ShivaLanRover/T" }, 1058 { 0x01ce, "ShivaUniversal" }, 1059 { 0x01d8, "CastelleFAXPressServer" }, 1060 { 0x01da, "CastelleLANPressPrintServer" }, 1061 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" }, 1062 { 0x01f0, "LEGATO" }, 1063 { 0x01f5, "LEGATO" }, 1064 { 0x0233, "NMS Agent/NetwareManagementAgent" }, 1065 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" }, 1066 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" }, 1067 { 0x023a, "LANtern" }, 1068 { 0x023c, "MAVERICK" }, 1069 { 0x023f, "NovellSMDR" }, 1070 { 0x024e, "NetwareConnect" }, 1071 { 0x024f, "NASI ServerBroadcast Cisco" }, 1072 { 0x026a, "NMS ServiceConsole" }, 1073 { 0x026b, "TimeSynchronizationServer Netware 4.x" }, 1074 { 0x0278, "DirectoryServer Netware 4.x" }, 1075 { 0x027b, "NetwareManagementAgent" }, 1076 { 0x0280, "Novell File and Printer Sharing Service for PC" }, 1077 { 0x0304, "NovellSAA Gateway" }, 1078 { 0x0308, "COM/VERMED" }, 1079 { 0x030a, "GalacticommWorldgroupServer" }, 1080 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" }, 1081 { 0x0320, "AttachmateGateway" }, 1082 { 0x0327, "MicrosoftDiagnostiocs" }, 1083 { 0x0328, "WATCOM SQL Server" }, 1084 { 0x0335, "MultiTechSystems MultisynchCommServer" }, 1085 { 0x0343, "Xylogics RemoteAccessServer/LANModem" }, 1086 { 0x0355, "ArcadaBackupExec" }, 1087 { 0x0358, "MSLCD1" }, 1088 { 0x0361, "NETINELO" }, 1089 { 0x037e, "Powerchute UPS Monitoring" }, 1090 { 0x037f, "ViruSafeNotify" }, 1091 { 0x0386, "HP Bridge" }, 1092 { 0x0387, "HP Hub" }, 1093 { 0x0394, "NetWare SAA Gateway" }, 1094 { 0x039b, "LotusNotes" }, 1095 { 0x03b7, "CertusAntiVirus" }, 1096 { 0x03c4, "ARCserve4.0" }, 1097 { 0x03c7, "LANspool3.5" }, 1098 { 0x03d7, "LexmarkPrinterServer" }, 1099 { 0x03d8, "LexmarkXLE PrinterServer" }, 1100 { 0x03dd, "BanyanENS NetwareClient" }, 1101 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" }, 1102 { 0x03e1, "UnivelUnixware" }, 1103 { 0x03e4, "UnivelUnixware" }, 1104 { 0x03fc, "IntelNetport" }, 1105 { 0x03fd, "PrintServerQueue" }, 1106 { 0x040A, "ipnServer" }, 1107 { 0x040D, "LVERRMAN" }, 1108 { 0x040E, "LVLIC" }, 1109 { 0x0414, "NET Silicon (DPI)/Kyocera" }, 1110 { 0x0429, "SiteLockVirus" }, 1111 { 0x0432, "UFHELPR???" }, 1112 { 0x0433, "Synoptics281xAdvancedSNMPAgent" }, 1113 { 0x0444, "MicrosoftNT SNA Server" }, 1114 { 0x0448, "Oracle" }, 1115 { 0x044c, "ARCserve5.01" }, 1116 { 0x0457, "CanonGP55" }, 1117 { 0x045a, "QMS Printers" }, 1118 { 0x045b, "DellSCSI Array" }, 1119 { 0x0491, "NetBlazerModems" }, 1120 { 0x04ac, "OnTimeScheduler" }, 1121 { 0x04b0, "CD-Net" }, 1122 { 0x0513, "EmulexNQA" }, 1123 { 0x0520, "SiteLockChecks" }, 1124 { 0x0529, "SiteLockChecks" }, 1125 { 0x052d, "CitrixOS2 AppServer" }, 1126 { 0x0535, "Tektronix" }, 1127 { 0x0536, "Milan" }, 1128 { 0x055d, "Attachmate SNA gateway" }, 1129 { 0x056b, "IBM8235 ModemServer" }, 1130 { 0x056c, "ShivaLanRover/E PLUS" }, 1131 { 0x056d, "ShivaLanRover/T PLUS" }, 1132 { 0x0580, "McAfeeNetShield" }, 1133 { 0x05B8, "NLM to workstation communication (Revelation Software)" }, 1134 { 0x05BA, "CompatibleSystemsRouters" }, 1135 { 0x05BE, "CheyenneHierarchicalStorageManager" }, 1136 { 0x0606, "JCWatermarkImaging" }, 1137 { 0x060c, "AXISNetworkPrinter" }, 1138 { 0x0610, "AdaptecSCSIManagement" }, 1139 { 0x0621, "IBM AntiVirus" }, 1140 { 0x0640, "Windows95 RemoteRegistryService" }, 1141 { 0x064e, "MicrosoftIIS" }, 1142 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1143 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1144 { 0x076C, "Xerox" }, 1145 { 0x079b, "ShivaLanRover/E 115" }, 1146 { 0x079c, "ShivaLanRover/T 115" }, 1147 { 0x07B4, "CubixWorldDesk" }, 1148 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" }, 1149 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" }, 1150 { 0x0810, "ELAN License Server Demo" }, 1151 { 0x0824, "ShivaLanRoverAccessSwitch/E" }, 1152 { 0x086a, "ISSC Collector" }, 1153 { 0x087f, "ISSC DAS AgentAIX" }, 1154 { 0x0880, "Intel Netport PRO" }, 1155 { 0x0881, "Intel Netport PRO" }, 1156 { 0x0b29, "SiteLock" }, 1157 { 0x0c29, "SiteLockApplications" }, 1158 { 0x0c2c, "LicensingServer" }, 1159 { 0x2101, "PerformanceTechnologyInstantInternet" }, 1160 { 0x2380, "LAI SiteLock" }, 1161 { 0x238c, "MeetingMaker" }, 1162 { 0x4808, "SiteLockServer/SiteLockMetering" }, 1163 { 0x5555, "SiteLockUser" }, 1164 { 0x6312, "Tapeware" }, 1165 { 0x6f00, "RabbitGateway" }, 1166 { 0x7703, "MODEM" }, 1167 { 0x8002, "NetPortPrinters" }, 1168 { 0x8008, "WordPerfectNetworkVersion" }, 1169 { 0x85BE, "Cisco EIGRP" }, 1170 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" }, 1171 { 0x9000, "McAfeeNetShield" }, 1172 { 0x9604, "CSA-NT_MON" }, 1173 { 0xb6a8, "OceanIsleReachoutRemoteControl" }, 1174 { 0xf11f, "SiteLockMetering" }, 1175 { 0xf1ff, "SiteLock" }, 1176 { 0xf503, "Microsoft SQL Server" }, 1177 { 0xF905, "IBM TimeAndPlace" }, 1178 { 0xfbfb, "TopCallIII FaxServer" }, 1179 { 0xffff, "AnyService/Wildcard" }, 1180 { 0, (char *)0 } 1181 }; 1182 1183 static void 1184 init_ipxsaparray(netdissect_options *ndo) 1185 { 1186 register int i; 1187 register struct hnamemem *table; 1188 1189 for (i = 0; ipxsap_db[i].s != NULL; i++) { 1190 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1); 1191 table = &ipxsaptable[j]; 1192 while (table->name) 1193 table = table->nxt; 1194 table->name = ipxsap_db[i].s; 1195 table->addr = htons(ipxsap_db[i].v); 1196 table->nxt = newhnamemem(ndo); 1197 } 1198 } 1199 1200 /* 1201 * Initialize the address to name translation machinery. We map all 1202 * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true 1203 * (i.e., to prevent blocking on the nameserver). localnet is the IP address 1204 * of the local network. mask is its subnet mask. 1205 */ 1206 void 1207 init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask) 1208 { 1209 if (ndo->ndo_fflag) { 1210 f_localnet = localnet; 1211 f_netmask = mask; 1212 } 1213 if (ndo->ndo_nflag) 1214 /* 1215 * Simplest way to suppress names. 1216 */ 1217 return; 1218 1219 init_etherarray(ndo); 1220 init_servarray(ndo); 1221 init_eprotoarray(ndo); 1222 init_protoidarray(ndo); 1223 init_ipxsaparray(ndo); 1224 } 1225 1226 const char * 1227 dnaddr_string(netdissect_options *ndo, u_short dnaddr) 1228 { 1229 register struct hnamemem *tp; 1230 1231 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL; 1232 tp = tp->nxt) 1233 if (tp->addr == dnaddr) 1234 return (tp->name); 1235 1236 tp->addr = dnaddr; 1237 tp->nxt = newhnamemem(ndo); 1238 if (ndo->ndo_nflag) 1239 tp->name = dnnum_string(ndo, dnaddr); 1240 else 1241 tp->name = dnname_string(ndo, dnaddr); 1242 1243 return(tp->name); 1244 } 1245 1246 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */ 1247 struct hnamemem * 1248 newhnamemem(netdissect_options *ndo) 1249 { 1250 register struct hnamemem *p; 1251 static struct hnamemem *ptr = NULL; 1252 static u_int num = 0; 1253 1254 if (num <= 0) { 1255 num = 64; 1256 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr)); 1257 if (ptr == NULL) 1258 (*ndo->ndo_error)(ndo, "newhnamemem: calloc"); 1259 } 1260 --num; 1261 p = ptr++; 1262 return (p); 1263 } 1264 1265 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */ 1266 struct h6namemem * 1267 newh6namemem(netdissect_options *ndo) 1268 { 1269 register struct h6namemem *p; 1270 static struct h6namemem *ptr = NULL; 1271 static u_int num = 0; 1272 1273 if (num <= 0) { 1274 num = 64; 1275 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr)); 1276 if (ptr == NULL) 1277 (*ndo->ndo_error)(ndo, "newh6namemem: calloc"); 1278 } 1279 --num; 1280 p = ptr++; 1281 return (p); 1282 } 1283 1284 /* Represent TCI part of the 802.1Q 4-octet tag as text. */ 1285 const char * 1286 ieee8021q_tci_string(const uint16_t tci) 1287 { 1288 static char buf[128]; 1289 snprintf(buf, sizeof(buf), "vlan %u, p %u%s", 1290 tci & 0xfff, 1291 tci >> 13, 1292 (tci & 0x1000) ? ", DEI" : ""); 1293 return buf; 1294 } 1295