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 #include <sys/cdefs.h> 25 #ifndef lint 26 __RCSID("$NetBSD: addrtoname.c,v 1.9 2017/02/05 04:05:05 spz Exp $"); 27 #endif 28 29 #ifdef HAVE_CONFIG_H 30 #include "config.h" 31 #endif 32 33 #include <netdissect-stdinc.h> 34 35 #ifdef USE_ETHER_NTOHOST 36 #ifdef HAVE_NETINET_IF_ETHER_H 37 struct mbuf; /* Squelch compiler warnings on some platforms for */ 38 struct rtentry; /* declarations in <net/if.h> */ 39 #include <net/if.h> /* for "struct ifnet" in "struct arpcom" on Solaris */ 40 #include <netinet/if_ether.h> 41 #endif /* HAVE_NETINET_IF_ETHER_H */ 42 #ifdef NETINET_ETHER_H_DECLARES_ETHER_NTOHOST 43 #include <netinet/ether.h> 44 #endif /* NETINET_ETHER_H_DECLARES_ETHER_NTOHOST */ 45 46 #if !defined(HAVE_DECL_ETHER_NTOHOST) || !HAVE_DECL_ETHER_NTOHOST 47 #ifndef HAVE_STRUCT_ETHER_ADDR 48 struct ether_addr { 49 unsigned char ether_addr_octet[6]; 50 }; 51 #endif 52 extern int ether_ntohost(char *, const struct ether_addr *); 53 #endif 54 55 #endif /* USE_ETHER_NTOHOST */ 56 57 #include <pcap.h> 58 #include <pcap-namedb.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <string.h> 62 #include <stdlib.h> 63 64 #include "netdissect.h" 65 #include "addrtoname.h" 66 #include "addrtostr.h" 67 #include "ethertype.h" 68 #include "llc.h" 69 #include "setsignal.h" 70 #include "extract.h" 71 #include "oui.h" 72 73 #ifndef ETHER_ADDR_LEN 74 #define ETHER_ADDR_LEN 6 75 #endif 76 77 /* 78 * hash tables for whatever-to-name translations 79 * 80 * ndo_error() called on strdup(3) failure 81 */ 82 83 #define HASHNAMESIZE 4096 84 85 struct hnamemem { 86 uint32_t addr; 87 const char *name; 88 struct hnamemem *nxt; 89 }; 90 91 static struct hnamemem hnametable[HASHNAMESIZE]; 92 static struct hnamemem tporttable[HASHNAMESIZE]; 93 static struct hnamemem uporttable[HASHNAMESIZE]; 94 static struct hnamemem eprototable[HASHNAMESIZE]; 95 static struct hnamemem dnaddrtable[HASHNAMESIZE]; 96 static struct hnamemem ipxsaptable[HASHNAMESIZE]; 97 98 #ifdef _WIN32 99 /* 100 * fake gethostbyaddr for Win2k/XP 101 * gethostbyaddr() returns incorrect value when AF_INET6 is passed 102 * to 3rd argument. 103 * 104 * h_name in struct hostent is only valid. 105 */ 106 static struct hostent * 107 win32_gethostbyaddr(const char *addr, int len, int type) 108 { 109 static struct hostent host; 110 static char hostbuf[NI_MAXHOST]; 111 char hname[NI_MAXHOST]; 112 struct sockaddr_in6 addr6; 113 114 host.h_name = hostbuf; 115 switch (type) { 116 case AF_INET: 117 return gethostbyaddr(addr, len, type); 118 break; 119 case AF_INET6: 120 memset(&addr6, 0, sizeof(addr6)); 121 addr6.sin6_family = AF_INET6; 122 memcpy(&addr6.sin6_addr, addr, len); 123 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6), 124 hname, sizeof(hname), NULL, 0, 0)) { 125 return NULL; 126 } else { 127 strcpy(host.h_name, hname); 128 return &host; 129 } 130 break; 131 default: 132 return NULL; 133 } 134 } 135 #define gethostbyaddr win32_gethostbyaddr 136 #endif /* _WIN32 */ 137 138 struct h6namemem { 139 struct in6_addr addr; 140 char *name; 141 struct h6namemem *nxt; 142 }; 143 144 static struct h6namemem h6nametable[HASHNAMESIZE]; 145 146 struct enamemem { 147 u_short e_addr0; 148 u_short e_addr1; 149 u_short e_addr2; 150 const char *e_name; 151 u_char *e_nsap; /* used only for nsaptable[] */ 152 #define e_bs e_nsap /* for bytestringtable */ 153 struct enamemem *e_nxt; 154 }; 155 156 static struct enamemem enametable[HASHNAMESIZE]; 157 static struct enamemem nsaptable[HASHNAMESIZE]; 158 static struct enamemem bytestringtable[HASHNAMESIZE]; 159 160 struct protoidmem { 161 uint32_t p_oui; 162 u_short p_proto; 163 const char *p_name; 164 struct protoidmem *p_nxt; 165 }; 166 167 static struct protoidmem protoidtable[HASHNAMESIZE]; 168 169 /* 170 * A faster replacement for inet_ntoa(). 171 */ 172 const char * 173 intoa(uint32_t addr) 174 { 175 register char *cp; 176 register u_int byte; 177 register int n; 178 static char buf[sizeof(".xxx.xxx.xxx.xxx")]; 179 180 NTOHL(addr); 181 cp = buf + sizeof(buf); 182 *--cp = '\0'; 183 184 n = 4; 185 do { 186 byte = addr & 0xff; 187 *--cp = byte % 10 + '0'; 188 byte /= 10; 189 if (byte > 0) { 190 *--cp = byte % 10 + '0'; 191 byte /= 10; 192 if (byte > 0) 193 *--cp = byte + '0'; 194 } 195 *--cp = '.'; 196 addr >>= 8; 197 } while (--n > 0); 198 199 return cp + 1; 200 } 201 202 static uint32_t f_netmask; 203 static uint32_t f_localnet; 204 205 /* 206 * Return a name for the IP address pointed to by ap. This address 207 * is assumed to be in network byte order. 208 * 209 * NOTE: ap is *NOT* necessarily part of the packet data (not even if 210 * this is being called with the "ipaddr_string()" macro), so you 211 * *CANNOT* use the ND_TCHECK{2}/ND_TTEST{2} macros on it. Furthermore, 212 * even in cases where it *is* part of the packet data, the caller 213 * would still have to check for a null return value, even if it's 214 * just printing the return value with "%s" - not all versions of 215 * printf print "(null)" with "%s" and a null pointer, some of them 216 * don't check for a null pointer and crash in that case. 217 * 218 * The callers of this routine should, before handing this routine 219 * a pointer to packet data, be sure that the data is present in 220 * the packet buffer. They should probably do those checks anyway, 221 * as other data at that layer might not be IP addresses, and it 222 * also needs to check whether they're present in the packet buffer. 223 */ 224 const char * 225 getname(netdissect_options *ndo, const u_char *ap) 226 { 227 register struct hostent *hp; 228 uint32_t addr; 229 struct hnamemem *p; 230 231 memcpy(&addr, ap, sizeof(addr)); 232 p = &hnametable[addr & (HASHNAMESIZE-1)]; 233 for (; p->nxt; p = p->nxt) { 234 if (p->addr == addr) 235 return (p->name); 236 } 237 p->addr = addr; 238 p->nxt = newhnamemem(ndo); 239 240 /* 241 * Print names unless: 242 * (1) -n was given. 243 * (2) Address is foreign and -f was given. (If -f was not 244 * given, f_netmask and f_localnet are 0 and the test 245 * evaluates to true) 246 */ 247 if (!ndo->ndo_nflag && 248 (addr & f_netmask) == f_localnet) { 249 hp = gethostbyaddr((char *)&addr, 4, AF_INET); 250 if (hp) { 251 char *dotp; 252 253 p->name = strdup(hp->h_name); 254 if (p->name == NULL) 255 (*ndo->ndo_error)(ndo, 256 "getname: strdup(hp->h_name)"); 257 if (ndo->ndo_Nflag) { 258 /* Remove domain qualifications */ 259 dotp = strchr(p->name, '.'); 260 if (dotp) 261 *dotp = '\0'; 262 } 263 return (p->name); 264 } 265 } 266 p->name = strdup(intoa(addr)); 267 if (p->name == NULL) 268 (*ndo->ndo_error)(ndo, "getname: strdup(intoa(addr))"); 269 return (p->name); 270 } 271 272 /* 273 * Return a name for the IP6 address pointed to by ap. This address 274 * is assumed to be in network byte order. 275 */ 276 const char * 277 getname6(netdissect_options *ndo, const u_char *ap) 278 { 279 register struct hostent *hp; 280 union { 281 struct in6_addr addr; 282 struct for_hash_addr { 283 char fill[14]; 284 uint16_t d; 285 } addra; 286 } addr; 287 struct h6namemem *p; 288 register const char *cp; 289 char ntop_buf[INET6_ADDRSTRLEN]; 290 291 memcpy(&addr, ap, sizeof(addr)); 292 p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)]; 293 for (; p->nxt; p = p->nxt) { 294 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0) 295 return (p->name); 296 } 297 p->addr = addr.addr; 298 p->nxt = newh6namemem(ndo); 299 300 /* 301 * Do not print names if -n was given. 302 */ 303 if (!ndo->ndo_nflag) { 304 hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6); 305 if (hp) { 306 char *dotp; 307 308 p->name = strdup(hp->h_name); 309 if (p->name == NULL) 310 (*ndo->ndo_error)(ndo, 311 "getname6: strdup(hp->h_name)"); 312 if (ndo->ndo_Nflag) { 313 /* Remove domain qualifications */ 314 dotp = strchr(p->name, '.'); 315 if (dotp) 316 *dotp = '\0'; 317 } 318 return (p->name); 319 } 320 } 321 cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf)); 322 p->name = strdup(cp); 323 if (p->name == NULL) 324 (*ndo->ndo_error)(ndo, "getname6: strdup(cp)"); 325 return (p->name); 326 } 327 328 static const char hex[] = "0123456789abcdef"; 329 330 331 /* Find the hash node that corresponds the ether address 'ep' */ 332 333 static inline struct enamemem * 334 lookup_emem(netdissect_options *ndo, const u_char *ep) 335 { 336 register u_int i, j, k; 337 struct enamemem *tp; 338 339 k = (ep[0] << 8) | ep[1]; 340 j = (ep[2] << 8) | ep[3]; 341 i = (ep[4] << 8) | ep[5]; 342 343 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)]; 344 while (tp->e_nxt) 345 if (tp->e_addr0 == i && 346 tp->e_addr1 == j && 347 tp->e_addr2 == k) 348 return tp; 349 else 350 tp = tp->e_nxt; 351 tp->e_addr0 = i; 352 tp->e_addr1 = j; 353 tp->e_addr2 = k; 354 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 355 if (tp->e_nxt == NULL) 356 (*ndo->ndo_error)(ndo, "lookup_emem: calloc"); 357 358 return tp; 359 } 360 361 /* 362 * Find the hash node that corresponds to the bytestring 'bs' 363 * with length 'nlen' 364 */ 365 366 static inline struct enamemem * 367 lookup_bytestring(netdissect_options *ndo, register const u_char *bs, 368 const unsigned int nlen) 369 { 370 struct enamemem *tp; 371 register u_int i, j, k; 372 373 if (nlen >= 6) { 374 k = (bs[0] << 8) | bs[1]; 375 j = (bs[2] << 8) | bs[3]; 376 i = (bs[4] << 8) | bs[5]; 377 } else if (nlen >= 4) { 378 k = (bs[0] << 8) | bs[1]; 379 j = (bs[2] << 8) | bs[3]; 380 i = 0; 381 } else 382 i = j = k = 0; 383 384 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)]; 385 while (tp->e_nxt) 386 if (tp->e_addr0 == i && 387 tp->e_addr1 == j && 388 tp->e_addr2 == k && 389 memcmp((const char *)bs, (const char *)(tp->e_bs), nlen) == 0) 390 return tp; 391 else 392 tp = tp->e_nxt; 393 394 tp->e_addr0 = i; 395 tp->e_addr1 = j; 396 tp->e_addr2 = k; 397 398 tp->e_bs = (u_char *) calloc(1, nlen + 1); 399 if (tp->e_bs == NULL) 400 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 401 402 memcpy(tp->e_bs, bs, nlen); 403 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 404 if (tp->e_nxt == NULL) 405 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 406 407 return tp; 408 } 409 410 /* Find the hash node that corresponds the NSAP 'nsap' */ 411 412 static inline struct enamemem * 413 lookup_nsap(netdissect_options *ndo, register const u_char *nsap, 414 register u_int nsap_length) 415 { 416 register u_int i, j, k; 417 struct enamemem *tp; 418 const u_char *ensap; 419 420 if (nsap_length > 6) { 421 ensap = nsap + nsap_length - 6; 422 k = (ensap[0] << 8) | ensap[1]; 423 j = (ensap[2] << 8) | ensap[3]; 424 i = (ensap[4] << 8) | ensap[5]; 425 } 426 else 427 i = j = k = 0; 428 429 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)]; 430 while (tp->e_nxt) 431 if (tp->e_addr0 == i && 432 tp->e_addr1 == j && 433 tp->e_addr2 == k && 434 tp->e_nsap[0] == nsap_length && 435 memcmp((const char *)&(nsap[1]), 436 (char *)&(tp->e_nsap[1]), nsap_length) == 0) 437 return tp; 438 else 439 tp = tp->e_nxt; 440 tp->e_addr0 = i; 441 tp->e_addr1 = j; 442 tp->e_addr2 = k; 443 tp->e_nsap = (u_char *)malloc(nsap_length + 1); 444 if (tp->e_nsap == NULL) 445 (*ndo->ndo_error)(ndo, "lookup_nsap: malloc"); 446 tp->e_nsap[0] = (u_char)nsap_length; /* guaranteed < ISONSAP_MAX_LENGTH */ 447 memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length); 448 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 449 if (tp->e_nxt == NULL) 450 (*ndo->ndo_error)(ndo, "lookup_nsap: calloc"); 451 452 return tp; 453 } 454 455 /* Find the hash node that corresponds the protoid 'pi'. */ 456 457 static inline struct protoidmem * 458 lookup_protoid(netdissect_options *ndo, const u_char *pi) 459 { 460 register u_int i, j; 461 struct protoidmem *tp; 462 463 /* 5 octets won't be aligned */ 464 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2]; 465 j = (pi[3] << 8) + pi[4]; 466 /* XXX should be endian-insensitive, but do big-endian testing XXX */ 467 468 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)]; 469 while (tp->p_nxt) 470 if (tp->p_oui == i && tp->p_proto == j) 471 return tp; 472 else 473 tp = tp->p_nxt; 474 tp->p_oui = i; 475 tp->p_proto = j; 476 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp)); 477 if (tp->p_nxt == NULL) 478 (*ndo->ndo_error)(ndo, "lookup_protoid: calloc"); 479 480 return tp; 481 } 482 483 const char * 484 etheraddr_string(netdissect_options *ndo, register const u_char *ep) 485 { 486 register int i; 487 register char *cp; 488 register struct enamemem *tp; 489 int oui; 490 char buf[BUFSIZE]; 491 492 tp = lookup_emem(ndo, ep); 493 if (tp->e_name) 494 return (tp->e_name); 495 #ifdef USE_ETHER_NTOHOST 496 if (!ndo->ndo_nflag) { 497 char buf2[BUFSIZE]; 498 499 if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) { 500 tp->e_name = strdup(buf2); 501 if (tp->e_name == NULL) 502 (*ndo->ndo_error)(ndo, 503 "etheraddr_string: strdup(buf2)"); 504 return (tp->e_name); 505 } 506 } 507 #endif 508 cp = buf; 509 oui = EXTRACT_24BITS(ep); 510 *cp++ = hex[*ep >> 4 ]; 511 *cp++ = hex[*ep++ & 0xf]; 512 for (i = 5; --i >= 0;) { 513 *cp++ = ':'; 514 *cp++ = hex[*ep >> 4 ]; 515 *cp++ = hex[*ep++ & 0xf]; 516 } 517 518 if (!ndo->ndo_nflag) { 519 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)", 520 tok2str(oui_values, "Unknown", oui)); 521 } else 522 *cp = '\0'; 523 tp->e_name = strdup(buf); 524 if (tp->e_name == NULL) 525 (*ndo->ndo_error)(ndo, "etheraddr_string: strdup(buf)"); 526 return (tp->e_name); 527 } 528 529 const char * 530 le64addr_string(netdissect_options *ndo, const u_char *ep) 531 { 532 const unsigned int len = 8; 533 register u_int i; 534 register char *cp; 535 register struct enamemem *tp; 536 char buf[BUFSIZE]; 537 538 tp = lookup_bytestring(ndo, ep, len); 539 if (tp->e_name) 540 return (tp->e_name); 541 542 cp = buf; 543 for (i = len; i > 0 ; --i) { 544 *cp++ = hex[*(ep + i - 1) >> 4]; 545 *cp++ = hex[*(ep + i - 1) & 0xf]; 546 *cp++ = ':'; 547 } 548 cp --; 549 550 *cp = '\0'; 551 552 tp->e_name = strdup(buf); 553 if (tp->e_name == NULL) 554 (*ndo->ndo_error)(ndo, "le64addr_string: strdup(buf)"); 555 556 return (tp->e_name); 557 } 558 559 const char * 560 linkaddr_string(netdissect_options *ndo, const u_char *ep, 561 const unsigned int type, const unsigned int len) 562 { 563 register u_int i; 564 register char *cp; 565 register struct enamemem *tp; 566 567 if (len == 0) 568 return ("<empty>"); 569 570 if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN) 571 return (etheraddr_string(ndo, ep)); 572 573 if (type == LINKADDR_FRELAY) 574 return (q922_string(ndo, ep, len)); 575 576 tp = lookup_bytestring(ndo, ep, len); 577 if (tp->e_name) 578 return (tp->e_name); 579 580 tp->e_name = cp = (char *)malloc(len*3); 581 if (tp->e_name == NULL) 582 (*ndo->ndo_error)(ndo, "linkaddr_string: malloc"); 583 *cp++ = hex[*ep >> 4]; 584 *cp++ = hex[*ep++ & 0xf]; 585 for (i = len-1; i > 0 ; --i) { 586 *cp++ = ':'; 587 *cp++ = hex[*ep >> 4]; 588 *cp++ = hex[*ep++ & 0xf]; 589 } 590 *cp = '\0'; 591 return (tp->e_name); 592 } 593 594 const char * 595 etherproto_string(netdissect_options *ndo, u_short port) 596 { 597 register char *cp; 598 register struct hnamemem *tp; 599 register uint32_t i = port; 600 char buf[sizeof("0000")]; 601 602 for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 603 if (tp->addr == i) 604 return (tp->name); 605 606 tp->addr = i; 607 tp->nxt = newhnamemem(ndo); 608 609 cp = buf; 610 NTOHS(port); 611 *cp++ = hex[port >> 12 & 0xf]; 612 *cp++ = hex[port >> 8 & 0xf]; 613 *cp++ = hex[port >> 4 & 0xf]; 614 *cp++ = hex[port & 0xf]; 615 *cp++ = '\0'; 616 tp->name = strdup(buf); 617 if (tp->name == NULL) 618 (*ndo->ndo_error)(ndo, "etherproto_string: strdup(buf)"); 619 return (tp->name); 620 } 621 622 const char * 623 protoid_string(netdissect_options *ndo, register const u_char *pi) 624 { 625 register u_int i, j; 626 register char *cp; 627 register struct protoidmem *tp; 628 char buf[sizeof("00:00:00:00:00")]; 629 630 tp = lookup_protoid(ndo, pi); 631 if (tp->p_name) 632 return tp->p_name; 633 634 cp = buf; 635 if ((j = *pi >> 4) != 0) 636 *cp++ = hex[j]; 637 *cp++ = hex[*pi++ & 0xf]; 638 for (i = 4; (int)--i >= 0;) { 639 *cp++ = ':'; 640 if ((j = *pi >> 4) != 0) 641 *cp++ = hex[j]; 642 *cp++ = hex[*pi++ & 0xf]; 643 } 644 *cp = '\0'; 645 tp->p_name = strdup(buf); 646 if (tp->p_name == NULL) 647 (*ndo->ndo_error)(ndo, "protoid_string: strdup(buf)"); 648 return (tp->p_name); 649 } 650 651 #define ISONSAP_MAX_LENGTH 20 652 const char * 653 isonsap_string(netdissect_options *ndo, const u_char *nsap, 654 register u_int nsap_length) 655 { 656 register u_int nsap_idx; 657 register char *cp; 658 register struct enamemem *tp; 659 660 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH) 661 return ("isonsap_string: illegal length"); 662 663 tp = lookup_nsap(ndo, nsap, nsap_length); 664 if (tp->e_name) 665 return tp->e_name; 666 667 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")); 668 if (cp == NULL) 669 (*ndo->ndo_error)(ndo, "isonsap_string: malloc"); 670 671 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) { 672 *cp++ = hex[*nsap >> 4]; 673 *cp++ = hex[*nsap++ & 0xf]; 674 if (((nsap_idx & 1) == 0) && 675 (nsap_idx + 1 < nsap_length)) { 676 *cp++ = '.'; 677 } 678 } 679 *cp = '\0'; 680 return (tp->e_name); 681 } 682 683 const char * 684 tcpport_string(netdissect_options *ndo, u_short port) 685 { 686 register struct hnamemem *tp; 687 register uint32_t i = port; 688 char buf[sizeof("00000")]; 689 690 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 691 if (tp->addr == i) 692 return (tp->name); 693 694 tp->addr = i; 695 tp->nxt = newhnamemem(ndo); 696 697 (void)snprintf(buf, sizeof(buf), "%u", i); 698 tp->name = strdup(buf); 699 if (tp->name == NULL) 700 (*ndo->ndo_error)(ndo, "tcpport_string: strdup(buf)"); 701 return (tp->name); 702 } 703 704 const char * 705 udpport_string(netdissect_options *ndo, register u_short port) 706 { 707 register struct hnamemem *tp; 708 register uint32_t i = port; 709 char buf[sizeof("00000")]; 710 711 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 712 if (tp->addr == i) 713 return (tp->name); 714 715 tp->addr = i; 716 tp->nxt = newhnamemem(ndo); 717 718 (void)snprintf(buf, sizeof(buf), "%u", i); 719 tp->name = strdup(buf); 720 if (tp->name == NULL) 721 (*ndo->ndo_error)(ndo, "udpport_string: strdup(buf)"); 722 return (tp->name); 723 } 724 725 const char * 726 ipxsap_string(netdissect_options *ndo, u_short port) 727 { 728 register char *cp; 729 register struct hnamemem *tp; 730 register uint32_t i = port; 731 char buf[sizeof("0000")]; 732 733 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 734 if (tp->addr == i) 735 return (tp->name); 736 737 tp->addr = i; 738 tp->nxt = newhnamemem(ndo); 739 740 cp = buf; 741 NTOHS(port); 742 *cp++ = hex[port >> 12 & 0xf]; 743 *cp++ = hex[port >> 8 & 0xf]; 744 *cp++ = hex[port >> 4 & 0xf]; 745 *cp++ = hex[port & 0xf]; 746 *cp++ = '\0'; 747 tp->name = strdup(buf); 748 if (tp->name == NULL) 749 (*ndo->ndo_error)(ndo, "ipxsap_string: strdup(buf)"); 750 return (tp->name); 751 } 752 753 static void 754 init_servarray(netdissect_options *ndo) 755 { 756 struct servent *sv; 757 register struct hnamemem *table; 758 register int i; 759 char buf[sizeof("0000000000")]; 760 761 while ((sv = getservent()) != NULL) { 762 int port = ntohs(sv->s_port); 763 i = port & (HASHNAMESIZE-1); 764 if (strcmp(sv->s_proto, "tcp") == 0) 765 table = &tporttable[i]; 766 else if (strcmp(sv->s_proto, "udp") == 0) 767 table = &uporttable[i]; 768 else 769 continue; 770 771 while (table->name) 772 table = table->nxt; 773 if (ndo->ndo_nflag) { 774 (void)snprintf(buf, sizeof(buf), "%d", port); 775 table->name = strdup(buf); 776 } else 777 table->name = strdup(sv->s_name); 778 if (table->name == NULL) 779 (*ndo->ndo_error)(ndo, "init_servarray: strdup"); 780 781 table->addr = port; 782 table->nxt = newhnamemem(ndo); 783 } 784 endservent(); 785 } 786 787 static const struct eproto { 788 const char *s; 789 u_short p; 790 } eproto_db[] = { 791 { "pup", ETHERTYPE_PUP }, 792 { "xns", ETHERTYPE_NS }, 793 { "ip", ETHERTYPE_IP }, 794 { "ip6", ETHERTYPE_IPV6 }, 795 { "arp", ETHERTYPE_ARP }, 796 { "rarp", ETHERTYPE_REVARP }, 797 { "sprite", ETHERTYPE_SPRITE }, 798 { "mopdl", ETHERTYPE_MOPDL }, 799 { "moprc", ETHERTYPE_MOPRC }, 800 { "decnet", ETHERTYPE_DN }, 801 { "lat", ETHERTYPE_LAT }, 802 { "sca", ETHERTYPE_SCA }, 803 { "lanbridge", ETHERTYPE_LANBRIDGE }, 804 { "vexp", ETHERTYPE_VEXP }, 805 { "vprod", ETHERTYPE_VPROD }, 806 { "atalk", ETHERTYPE_ATALK }, 807 { "atalkarp", ETHERTYPE_AARP }, 808 { "loopback", ETHERTYPE_LOOPBACK }, 809 { "decdts", ETHERTYPE_DECDTS }, 810 { "decdns", ETHERTYPE_DECDNS }, 811 { (char *)0, 0 } 812 }; 813 814 static void 815 init_eprotoarray(netdissect_options *ndo) 816 { 817 register int i; 818 register struct hnamemem *table; 819 820 for (i = 0; eproto_db[i].s; i++) { 821 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1); 822 table = &eprototable[j]; 823 while (table->name) 824 table = table->nxt; 825 table->name = eproto_db[i].s; 826 table->addr = htons(eproto_db[i].p); 827 table->nxt = newhnamemem(ndo); 828 } 829 } 830 831 static const struct protoidlist { 832 const u_char protoid[5]; 833 const char *name; 834 } protoidlist[] = { 835 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" }, 836 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" }, 837 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" }, 838 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" }, 839 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" }, 840 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 841 }; 842 843 /* 844 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet 845 * types. 846 */ 847 static void 848 init_protoidarray(netdissect_options *ndo) 849 { 850 register int i; 851 register struct protoidmem *tp; 852 const struct protoidlist *pl; 853 u_char protoid[5]; 854 855 protoid[0] = 0; 856 protoid[1] = 0; 857 protoid[2] = 0; 858 for (i = 0; eproto_db[i].s; i++) { 859 u_short etype = htons(eproto_db[i].p); 860 861 memcpy((char *)&protoid[3], (char *)&etype, 2); 862 tp = lookup_protoid(ndo, protoid); 863 tp->p_name = strdup(eproto_db[i].s); 864 if (tp->p_name == NULL) 865 (*ndo->ndo_error)(ndo, 866 "init_protoidarray: strdup(eproto_db[i].s)"); 867 } 868 /* Hardwire some SNAP proto ID names */ 869 for (pl = protoidlist; pl->name != NULL; ++pl) { 870 tp = lookup_protoid(ndo, pl->protoid); 871 /* Don't override existing name */ 872 if (tp->p_name != NULL) 873 continue; 874 875 tp->p_name = pl->name; 876 } 877 } 878 879 static const struct etherlist { 880 const u_char addr[6]; 881 const char *name; 882 } etherlist[] = { 883 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" }, 884 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 885 }; 886 887 /* 888 * Initialize the ethers hash table. We take two different approaches 889 * depending on whether or not the system provides the ethers name 890 * service. If it does, we just wire in a few names at startup, 891 * and etheraddr_string() fills in the table on demand. If it doesn't, 892 * then we suck in the entire /etc/ethers file at startup. The idea 893 * is that parsing the local file will be fast, but spinning through 894 * all the ethers entries via NIS & next_etherent might be very slow. 895 * 896 * XXX pcap_next_etherent doesn't belong in the pcap interface, but 897 * since the pcap module already does name-to-address translation, 898 * it's already does most of the work for the ethernet address-to-name 899 * translation, so we just pcap_next_etherent as a convenience. 900 */ 901 static void 902 init_etherarray(netdissect_options *ndo) 903 { 904 register const struct etherlist *el; 905 register struct enamemem *tp; 906 #ifdef USE_ETHER_NTOHOST 907 char name[256]; 908 #else 909 register struct pcap_etherent *ep; 910 register FILE *fp; 911 912 /* Suck in entire ethers file */ 913 fp = fopen(PCAP_ETHERS_FILE, "r"); 914 if (fp != NULL) { 915 while ((ep = pcap_next_etherent(fp)) != NULL) { 916 tp = lookup_emem(ndo, ep->addr); 917 tp->e_name = strdup(ep->name); 918 if (tp->e_name == NULL) 919 (*ndo->ndo_error)(ndo, 920 "init_etherarray: strdup(ep->addr)"); 921 } 922 (void)fclose(fp); 923 } 924 #endif 925 926 /* Hardwire some ethernet names */ 927 for (el = etherlist; el->name != NULL; ++el) { 928 tp = lookup_emem(ndo, el->addr); 929 /* Don't override existing name */ 930 if (tp->e_name != NULL) 931 continue; 932 933 #ifdef USE_ETHER_NTOHOST 934 /* 935 * Use YP/NIS version of name if available. 936 */ 937 if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) { 938 tp->e_name = strdup(name); 939 if (tp->e_name == NULL) 940 (*ndo->ndo_error)(ndo, 941 "init_etherarray: strdup(name)"); 942 continue; 943 } 944 #endif 945 tp->e_name = el->name; 946 } 947 } 948 949 static const struct tok ipxsap_db[] = { 950 { 0x0000, "Unknown" }, 951 { 0x0001, "User" }, 952 { 0x0002, "User Group" }, 953 { 0x0003, "PrintQueue" }, 954 { 0x0004, "FileServer" }, 955 { 0x0005, "JobServer" }, 956 { 0x0006, "Gateway" }, 957 { 0x0007, "PrintServer" }, 958 { 0x0008, "ArchiveQueue" }, 959 { 0x0009, "ArchiveServer" }, 960 { 0x000a, "JobQueue" }, 961 { 0x000b, "Administration" }, 962 { 0x000F, "Novell TI-RPC" }, 963 { 0x0017, "Diagnostics" }, 964 { 0x0020, "NetBIOS" }, 965 { 0x0021, "NAS SNA Gateway" }, 966 { 0x0023, "NACS AsyncGateway" }, 967 { 0x0024, "RemoteBridge/RoutingService" }, 968 { 0x0026, "BridgeServer" }, 969 { 0x0027, "TCP/IP Gateway" }, 970 { 0x0028, "Point-to-point X.25 BridgeServer" }, 971 { 0x0029, "3270 Gateway" }, 972 { 0x002a, "CHI Corp" }, 973 { 0x002c, "PC Chalkboard" }, 974 { 0x002d, "TimeSynchServer" }, 975 { 0x002e, "ARCserve5.0/PalindromeBackup" }, 976 { 0x0045, "DI3270 Gateway" }, 977 { 0x0047, "AdvertisingPrintServer" }, 978 { 0x004a, "NetBlazerModems" }, 979 { 0x004b, "BtrieveVAP" }, 980 { 0x004c, "NetwareSQL" }, 981 { 0x004d, "XtreeNetwork" }, 982 { 0x0050, "BtrieveVAP4.11" }, 983 { 0x0052, "QuickLink" }, 984 { 0x0053, "PrintQueueUser" }, 985 { 0x0058, "Multipoint X.25 Router" }, 986 { 0x0060, "STLB/NLM" }, 987 { 0x0064, "ARCserve" }, 988 { 0x0066, "ARCserve3.0" }, 989 { 0x0072, "WAN CopyUtility" }, 990 { 0x007a, "TES-NetwareVMS" }, 991 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" }, 992 { 0x0095, "DDA OBGYN" }, 993 { 0x0098, "NetwareAccessServer" }, 994 { 0x009a, "Netware for VMS II/NamedPipeServer" }, 995 { 0x009b, "NetwareAccessServer" }, 996 { 0x009e, "PortableNetwareServer/SunLinkNVT" }, 997 { 0x00a1, "PowerchuteAPC UPS" }, 998 { 0x00aa, "LAWserve" }, 999 { 0x00ac, "CompaqIDA StatusMonitor" }, 1000 { 0x0100, "PIPE STAIL" }, 1001 { 0x0102, "LAN ProtectBindery" }, 1002 { 0x0103, "OracleDataBaseServer" }, 1003 { 0x0107, "Netware386/RSPX RemoteConsole" }, 1004 { 0x010f, "NovellSNA Gateway" }, 1005 { 0x0111, "TestServer" }, 1006 { 0x0112, "HP PrintServer" }, 1007 { 0x0114, "CSA MUX" }, 1008 { 0x0115, "CSA LCA" }, 1009 { 0x0116, "CSA CM" }, 1010 { 0x0117, "CSA SMA" }, 1011 { 0x0118, "CSA DBA" }, 1012 { 0x0119, "CSA NMA" }, 1013 { 0x011a, "CSA SSA" }, 1014 { 0x011b, "CSA STATUS" }, 1015 { 0x011e, "CSA APPC" }, 1016 { 0x0126, "SNA TEST SSA Profile" }, 1017 { 0x012a, "CSA TRACE" }, 1018 { 0x012b, "NetwareSAA" }, 1019 { 0x012e, "IKARUS VirusScan" }, 1020 { 0x0130, "CommunicationsExecutive" }, 1021 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" }, 1022 { 0x0135, "NetwareNamingServicesProfile" }, 1023 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" }, 1024 { 0x0141, "LAN SpoolServer" }, 1025 { 0x0152, "IRMALAN Gateway" }, 1026 { 0x0154, "NamedPipeServer" }, 1027 { 0x0166, "NetWareManagement" }, 1028 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" }, 1029 { 0x0173, "Compaq" }, 1030 { 0x0174, "Compaq SNMP Agent" }, 1031 { 0x0175, "Compaq" }, 1032 { 0x0180, "XTreeServer/XTreeTools" }, 1033 { 0x018A, "NASI ServicesBroadcastServer" }, 1034 { 0x01b0, "GARP Gateway" }, 1035 { 0x01b1, "Binfview" }, 1036 { 0x01bf, "IntelLanDeskManager" }, 1037 { 0x01ca, "AXTEC" }, 1038 { 0x01cb, "ShivaNetModem/E" }, 1039 { 0x01cc, "ShivaLanRover/E" }, 1040 { 0x01cd, "ShivaLanRover/T" }, 1041 { 0x01ce, "ShivaUniversal" }, 1042 { 0x01d8, "CastelleFAXPressServer" }, 1043 { 0x01da, "CastelleLANPressPrintServer" }, 1044 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" }, 1045 { 0x01f0, "LEGATO" }, 1046 { 0x01f5, "LEGATO" }, 1047 { 0x0233, "NMS Agent/NetwareManagementAgent" }, 1048 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" }, 1049 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" }, 1050 { 0x023a, "LANtern" }, 1051 { 0x023c, "MAVERICK" }, 1052 { 0x023f, "NovellSMDR" }, 1053 { 0x024e, "NetwareConnect" }, 1054 { 0x024f, "NASI ServerBroadcast Cisco" }, 1055 { 0x026a, "NMS ServiceConsole" }, 1056 { 0x026b, "TimeSynchronizationServer Netware 4.x" }, 1057 { 0x0278, "DirectoryServer Netware 4.x" }, 1058 { 0x027b, "NetwareManagementAgent" }, 1059 { 0x0280, "Novell File and Printer Sharing Service for PC" }, 1060 { 0x0304, "NovellSAA Gateway" }, 1061 { 0x0308, "COM/VERMED" }, 1062 { 0x030a, "GalacticommWorldgroupServer" }, 1063 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" }, 1064 { 0x0320, "AttachmateGateway" }, 1065 { 0x0327, "MicrosoftDiagnostiocs" }, 1066 { 0x0328, "WATCOM SQL Server" }, 1067 { 0x0335, "MultiTechSystems MultisynchCommServer" }, 1068 { 0x0343, "Xylogics RemoteAccessServer/LANModem" }, 1069 { 0x0355, "ArcadaBackupExec" }, 1070 { 0x0358, "MSLCD1" }, 1071 { 0x0361, "NETINELO" }, 1072 { 0x037e, "Powerchute UPS Monitoring" }, 1073 { 0x037f, "ViruSafeNotify" }, 1074 { 0x0386, "HP Bridge" }, 1075 { 0x0387, "HP Hub" }, 1076 { 0x0394, "NetWare SAA Gateway" }, 1077 { 0x039b, "LotusNotes" }, 1078 { 0x03b7, "CertusAntiVirus" }, 1079 { 0x03c4, "ARCserve4.0" }, 1080 { 0x03c7, "LANspool3.5" }, 1081 { 0x03d7, "LexmarkPrinterServer" }, 1082 { 0x03d8, "LexmarkXLE PrinterServer" }, 1083 { 0x03dd, "BanyanENS NetwareClient" }, 1084 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" }, 1085 { 0x03e1, "UnivelUnixware" }, 1086 { 0x03e4, "UnivelUnixware" }, 1087 { 0x03fc, "IntelNetport" }, 1088 { 0x03fd, "PrintServerQueue" }, 1089 { 0x040A, "ipnServer" }, 1090 { 0x040D, "LVERRMAN" }, 1091 { 0x040E, "LVLIC" }, 1092 { 0x0414, "NET Silicon (DPI)/Kyocera" }, 1093 { 0x0429, "SiteLockVirus" }, 1094 { 0x0432, "UFHELPR???" }, 1095 { 0x0433, "Synoptics281xAdvancedSNMPAgent" }, 1096 { 0x0444, "MicrosoftNT SNA Server" }, 1097 { 0x0448, "Oracle" }, 1098 { 0x044c, "ARCserve5.01" }, 1099 { 0x0457, "CanonGP55" }, 1100 { 0x045a, "QMS Printers" }, 1101 { 0x045b, "DellSCSI Array" }, 1102 { 0x0491, "NetBlazerModems" }, 1103 { 0x04ac, "OnTimeScheduler" }, 1104 { 0x04b0, "CD-Net" }, 1105 { 0x0513, "EmulexNQA" }, 1106 { 0x0520, "SiteLockChecks" }, 1107 { 0x0529, "SiteLockChecks" }, 1108 { 0x052d, "CitrixOS2 AppServer" }, 1109 { 0x0535, "Tektronix" }, 1110 { 0x0536, "Milan" }, 1111 { 0x055d, "Attachmate SNA gateway" }, 1112 { 0x056b, "IBM8235 ModemServer" }, 1113 { 0x056c, "ShivaLanRover/E PLUS" }, 1114 { 0x056d, "ShivaLanRover/T PLUS" }, 1115 { 0x0580, "McAfeeNetShield" }, 1116 { 0x05B8, "NLM to workstation communication (Revelation Software)" }, 1117 { 0x05BA, "CompatibleSystemsRouters" }, 1118 { 0x05BE, "CheyenneHierarchicalStorageManager" }, 1119 { 0x0606, "JCWatermarkImaging" }, 1120 { 0x060c, "AXISNetworkPrinter" }, 1121 { 0x0610, "AdaptecSCSIManagement" }, 1122 { 0x0621, "IBM AntiVirus" }, 1123 { 0x0640, "Windows95 RemoteRegistryService" }, 1124 { 0x064e, "MicrosoftIIS" }, 1125 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1126 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1127 { 0x076C, "Xerox" }, 1128 { 0x079b, "ShivaLanRover/E 115" }, 1129 { 0x079c, "ShivaLanRover/T 115" }, 1130 { 0x07B4, "CubixWorldDesk" }, 1131 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" }, 1132 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" }, 1133 { 0x0810, "ELAN License Server Demo" }, 1134 { 0x0824, "ShivaLanRoverAccessSwitch/E" }, 1135 { 0x086a, "ISSC Collector" }, 1136 { 0x087f, "ISSC DAS AgentAIX" }, 1137 { 0x0880, "Intel Netport PRO" }, 1138 { 0x0881, "Intel Netport PRO" }, 1139 { 0x0b29, "SiteLock" }, 1140 { 0x0c29, "SiteLockApplications" }, 1141 { 0x0c2c, "LicensingServer" }, 1142 { 0x2101, "PerformanceTechnologyInstantInternet" }, 1143 { 0x2380, "LAI SiteLock" }, 1144 { 0x238c, "MeetingMaker" }, 1145 { 0x4808, "SiteLockServer/SiteLockMetering" }, 1146 { 0x5555, "SiteLockUser" }, 1147 { 0x6312, "Tapeware" }, 1148 { 0x6f00, "RabbitGateway" }, 1149 { 0x7703, "MODEM" }, 1150 { 0x8002, "NetPortPrinters" }, 1151 { 0x8008, "WordPerfectNetworkVersion" }, 1152 { 0x85BE, "Cisco EIGRP" }, 1153 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" }, 1154 { 0x9000, "McAfeeNetShield" }, 1155 { 0x9604, "CSA-NT_MON" }, 1156 { 0xb6a8, "OceanIsleReachoutRemoteControl" }, 1157 { 0xf11f, "SiteLockMetering" }, 1158 { 0xf1ff, "SiteLock" }, 1159 { 0xf503, "Microsoft SQL Server" }, 1160 { 0xF905, "IBM TimeAndPlace" }, 1161 { 0xfbfb, "TopCallIII FaxServer" }, 1162 { 0xffff, "AnyService/Wildcard" }, 1163 { 0, (char *)0 } 1164 }; 1165 1166 static void 1167 init_ipxsaparray(netdissect_options *ndo) 1168 { 1169 register int i; 1170 register struct hnamemem *table; 1171 1172 for (i = 0; ipxsap_db[i].s != NULL; i++) { 1173 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1); 1174 table = &ipxsaptable[j]; 1175 while (table->name) 1176 table = table->nxt; 1177 table->name = ipxsap_db[i].s; 1178 table->addr = htons(ipxsap_db[i].v); 1179 table->nxt = newhnamemem(ndo); 1180 } 1181 } 1182 1183 /* 1184 * Initialize the address to name translation machinery. We map all 1185 * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true 1186 * (i.e., to prevent blocking on the nameserver). localnet is the IP address 1187 * of the local network. mask is its subnet mask. 1188 */ 1189 void 1190 init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask) 1191 { 1192 if (ndo->ndo_fflag) { 1193 f_localnet = localnet; 1194 f_netmask = mask; 1195 } 1196 if (ndo->ndo_nflag) 1197 /* 1198 * Simplest way to suppress names. 1199 */ 1200 return; 1201 1202 init_etherarray(ndo); 1203 init_servarray(ndo); 1204 init_eprotoarray(ndo); 1205 init_protoidarray(ndo); 1206 init_ipxsaparray(ndo); 1207 } 1208 1209 const char * 1210 dnaddr_string(netdissect_options *ndo, u_short dnaddr) 1211 { 1212 register struct hnamemem *tp; 1213 1214 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL; 1215 tp = tp->nxt) 1216 if (tp->addr == dnaddr) 1217 return (tp->name); 1218 1219 tp->addr = dnaddr; 1220 tp->nxt = newhnamemem(ndo); 1221 if (ndo->ndo_nflag) 1222 tp->name = dnnum_string(ndo, dnaddr); 1223 else 1224 tp->name = dnname_string(ndo, dnaddr); 1225 1226 return(tp->name); 1227 } 1228 1229 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */ 1230 struct hnamemem * 1231 newhnamemem(netdissect_options *ndo) 1232 { 1233 register struct hnamemem *p; 1234 static struct hnamemem *ptr = NULL; 1235 static u_int num = 0; 1236 1237 if (num <= 0) { 1238 num = 64; 1239 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr)); 1240 if (ptr == NULL) 1241 (*ndo->ndo_error)(ndo, "newhnamemem: calloc"); 1242 } 1243 --num; 1244 p = ptr++; 1245 return (p); 1246 } 1247 1248 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */ 1249 struct h6namemem * 1250 newh6namemem(netdissect_options *ndo) 1251 { 1252 register struct h6namemem *p; 1253 static struct h6namemem *ptr = NULL; 1254 static u_int num = 0; 1255 1256 if (num <= 0) { 1257 num = 64; 1258 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr)); 1259 if (ptr == NULL) 1260 (*ndo->ndo_error)(ndo, "newh6namemem: calloc"); 1261 } 1262 --num; 1263 p = ptr++; 1264 return (p); 1265 } 1266 1267 /* Represent TCI part of the 802.1Q 4-octet tag as text. */ 1268 const char * 1269 ieee8021q_tci_string(const uint16_t tci) 1270 { 1271 static char buf[128]; 1272 snprintf(buf, sizeof(buf), "vlan %u, p %u%s", 1273 tci & 0xfff, 1274 tci >> 13, 1275 (tci & 0x1000) ? ", DEI" : ""); 1276 return buf; 1277 } 1278