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