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