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 1.11 2019/10/01 16:06:16 christos 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 strlcpy(host.h_name, hname, NI_MAXHOST); 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 struct enamemem *e_nxt; 153 }; 154 155 static struct enamemem enametable[HASHNAMESIZE]; 156 static struct enamemem nsaptable[HASHNAMESIZE]; 157 158 struct bsnamemem { 159 u_short bs_addr0; 160 u_short bs_addr1; 161 u_short bs_addr2; 162 const char *bs_name; 163 u_char *bs_bytes; 164 unsigned int bs_nbytes; 165 struct bsnamemem *bs_nxt; 166 }; 167 168 static struct bsnamemem bytestringtable[HASHNAMESIZE]; 169 170 struct protoidmem { 171 uint32_t p_oui; 172 u_short p_proto; 173 const char *p_name; 174 struct protoidmem *p_nxt; 175 }; 176 177 static struct protoidmem protoidtable[HASHNAMESIZE]; 178 179 /* 180 * A faster replacement for inet_ntoa(). 181 */ 182 const char * 183 intoa(uint32_t addr) 184 { 185 register char *cp; 186 register u_int byte; 187 register int n; 188 static char buf[sizeof(".xxx.xxx.xxx.xxx")]; 189 190 NTOHL(addr); 191 cp = buf + sizeof(buf); 192 *--cp = '\0'; 193 194 n = 4; 195 do { 196 byte = addr & 0xff; 197 *--cp = byte % 10 + '0'; 198 byte /= 10; 199 if (byte > 0) { 200 *--cp = byte % 10 + '0'; 201 byte /= 10; 202 if (byte > 0) 203 *--cp = byte + '0'; 204 } 205 *--cp = '.'; 206 addr >>= 8; 207 } while (--n > 0); 208 209 return cp + 1; 210 } 211 212 static uint32_t f_netmask; 213 static uint32_t f_localnet; 214 215 /* 216 * Return a name for the IP address pointed to by ap. This address 217 * is assumed to be in network byte order. 218 * 219 * NOTE: ap is *NOT* necessarily part of the packet data (not even if 220 * this is being called with the "ipaddr_string()" macro), so you 221 * *CANNOT* use the ND_TCHECK{2}/ND_TTEST{2} macros on it. Furthermore, 222 * even in cases where it *is* part of the packet data, the caller 223 * would still have to check for a null return value, even if it's 224 * just printing the return value with "%s" - not all versions of 225 * printf print "(null)" with "%s" and a null pointer, some of them 226 * don't check for a null pointer and crash in that case. 227 * 228 * The callers of this routine should, before handing this routine 229 * a pointer to packet data, be sure that the data is present in 230 * the packet buffer. They should probably do those checks anyway, 231 * as other data at that layer might not be IP addresses, and it 232 * also needs to check whether they're present in the packet buffer. 233 */ 234 const char * 235 getname(netdissect_options *ndo, const u_char *ap) 236 { 237 register struct hostent *hp; 238 uint32_t addr; 239 struct hnamemem *p; 240 241 memcpy(&addr, ap, sizeof(addr)); 242 p = &hnametable[addr & (HASHNAMESIZE-1)]; 243 for (; p->nxt; p = p->nxt) { 244 if (p->addr == addr) 245 return (p->name); 246 } 247 p->addr = addr; 248 p->nxt = newhnamemem(ndo); 249 250 /* 251 * Print names unless: 252 * (1) -n was given. 253 * (2) Address is foreign and -f was given. (If -f was not 254 * given, f_netmask and f_localnet are 0 and the test 255 * evaluates to true) 256 */ 257 if (!ndo->ndo_nflag && 258 (addr & f_netmask) == f_localnet) { 259 hp = gethostbyaddr((char *)&addr, 4, AF_INET); 260 if (hp) { 261 char *dotp; 262 263 p->name = strdup(hp->h_name); 264 if (p->name == NULL) 265 (*ndo->ndo_error)(ndo, 266 "getname: strdup(hp->h_name)"); 267 if (ndo->ndo_Nflag) { 268 /* Remove domain qualifications */ 269 dotp = strchr(p->name, '.'); 270 if (dotp) 271 *dotp = '\0'; 272 } 273 return (p->name); 274 } 275 } 276 p->name = strdup(intoa(addr)); 277 if (p->name == NULL) 278 (*ndo->ndo_error)(ndo, "getname: strdup(intoa(addr))"); 279 return (p->name); 280 } 281 282 /* 283 * Return a name for the IP6 address pointed to by ap. This address 284 * is assumed to be in network byte order. 285 */ 286 const char * 287 getname6(netdissect_options *ndo, const u_char *ap) 288 { 289 register struct hostent *hp; 290 union { 291 struct in6_addr addr; 292 struct for_hash_addr { 293 char fill[14]; 294 uint16_t d; 295 } addra; 296 } addr; 297 struct h6namemem *p; 298 register const char *cp; 299 char ntop_buf[INET6_ADDRSTRLEN]; 300 301 memcpy(&addr, ap, sizeof(addr)); 302 p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)]; 303 for (; p->nxt; p = p->nxt) { 304 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0) 305 return (p->name); 306 } 307 p->addr = addr.addr; 308 p->nxt = newh6namemem(ndo); 309 310 /* 311 * Do not print names if -n was given. 312 */ 313 if (!ndo->ndo_nflag) { 314 hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6); 315 if (hp) { 316 char *dotp; 317 318 p->name = strdup(hp->h_name); 319 if (p->name == NULL) 320 (*ndo->ndo_error)(ndo, 321 "getname6: strdup(hp->h_name)"); 322 if (ndo->ndo_Nflag) { 323 /* Remove domain qualifications */ 324 dotp = strchr(p->name, '.'); 325 if (dotp) 326 *dotp = '\0'; 327 } 328 return (p->name); 329 } 330 } 331 cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf)); 332 p->name = strdup(cp); 333 if (p->name == NULL) 334 (*ndo->ndo_error)(ndo, "getname6: strdup(cp)"); 335 return (p->name); 336 } 337 338 static const char hex[16] = "0123456789abcdef"; 339 340 341 /* Find the hash node that corresponds the ether address 'ep' */ 342 343 static inline struct enamemem * 344 lookup_emem(netdissect_options *ndo, const u_char *ep) 345 { 346 register u_int i, j, k; 347 struct enamemem *tp; 348 349 k = (ep[0] << 8) | ep[1]; 350 j = (ep[2] << 8) | ep[3]; 351 i = (ep[4] << 8) | ep[5]; 352 353 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)]; 354 while (tp->e_nxt) 355 if (tp->e_addr0 == i && 356 tp->e_addr1 == j && 357 tp->e_addr2 == k) 358 return tp; 359 else 360 tp = tp->e_nxt; 361 tp->e_addr0 = i; 362 tp->e_addr1 = j; 363 tp->e_addr2 = k; 364 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 365 if (tp->e_nxt == NULL) 366 (*ndo->ndo_error)(ndo, "lookup_emem: calloc"); 367 368 return tp; 369 } 370 371 /* 372 * Find the hash node that corresponds to the bytestring 'bs' 373 * with length 'nlen' 374 */ 375 376 static inline struct bsnamemem * 377 lookup_bytestring(netdissect_options *ndo, register const u_char *bs, 378 const unsigned int nlen) 379 { 380 struct bsnamemem *tp; 381 register u_int i, j, k; 382 383 if (nlen >= 6) { 384 k = (bs[0] << 8) | bs[1]; 385 j = (bs[2] << 8) | bs[3]; 386 i = (bs[4] << 8) | bs[5]; 387 } else if (nlen >= 4) { 388 k = (bs[0] << 8) | bs[1]; 389 j = (bs[2] << 8) | bs[3]; 390 i = 0; 391 } else 392 i = j = k = 0; 393 394 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)]; 395 while (tp->bs_nxt) 396 if (nlen == tp->bs_nbytes && 397 tp->bs_addr0 == i && 398 tp->bs_addr1 == j && 399 tp->bs_addr2 == k && 400 memcmp((const char *)bs, (const char *)(tp->bs_bytes), nlen) == 0) 401 return tp; 402 else 403 tp = tp->bs_nxt; 404 405 tp->bs_addr0 = i; 406 tp->bs_addr1 = j; 407 tp->bs_addr2 = k; 408 409 tp->bs_bytes = (u_char *) calloc(1, nlen); 410 if (tp->bs_bytes == NULL) 411 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 412 413 memcpy(tp->bs_bytes, bs, nlen); 414 tp->bs_nbytes = nlen; 415 tp->bs_nxt = (struct bsnamemem *)calloc(1, sizeof(*tp)); 416 if (tp->bs_nxt == NULL) 417 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc"); 418 419 return tp; 420 } 421 422 /* Find the hash node that corresponds the NSAP 'nsap' */ 423 424 static inline struct enamemem * 425 lookup_nsap(netdissect_options *ndo, register const u_char *nsap, 426 register u_int nsap_length) 427 { 428 register u_int i, j, k; 429 struct enamemem *tp; 430 const u_char *ensap; 431 432 if (nsap_length > 6) { 433 ensap = nsap + nsap_length - 6; 434 k = (ensap[0] << 8) | ensap[1]; 435 j = (ensap[2] << 8) | ensap[3]; 436 i = (ensap[4] << 8) | ensap[5]; 437 } 438 else 439 i = j = k = 0; 440 441 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)]; 442 while (tp->e_nxt) 443 if (nsap_length == tp->e_nsap[0] && 444 tp->e_addr0 == i && 445 tp->e_addr1 == j && 446 tp->e_addr2 == k && 447 memcmp((const char *)nsap, 448 (char *)&(tp->e_nsap[1]), nsap_length) == 0) 449 return tp; 450 else 451 tp = tp->e_nxt; 452 tp->e_addr0 = i; 453 tp->e_addr1 = j; 454 tp->e_addr2 = k; 455 tp->e_nsap = (u_char *)malloc(nsap_length + 1); 456 if (tp->e_nsap == NULL) 457 (*ndo->ndo_error)(ndo, "lookup_nsap: malloc"); 458 tp->e_nsap[0] = (u_char)nsap_length; /* guaranteed < ISONSAP_MAX_LENGTH */ 459 memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length); 460 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); 461 if (tp->e_nxt == NULL) 462 (*ndo->ndo_error)(ndo, "lookup_nsap: calloc"); 463 464 return tp; 465 } 466 467 /* Find the hash node that corresponds the protoid 'pi'. */ 468 469 static inline struct protoidmem * 470 lookup_protoid(netdissect_options *ndo, const u_char *pi) 471 { 472 register u_int i, j; 473 struct protoidmem *tp; 474 475 /* 5 octets won't be aligned */ 476 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2]; 477 j = (pi[3] << 8) + pi[4]; 478 /* XXX should be endian-insensitive, but do big-endian testing XXX */ 479 480 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)]; 481 while (tp->p_nxt) 482 if (tp->p_oui == i && tp->p_proto == j) 483 return tp; 484 else 485 tp = tp->p_nxt; 486 tp->p_oui = i; 487 tp->p_proto = j; 488 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp)); 489 if (tp->p_nxt == NULL) 490 (*ndo->ndo_error)(ndo, "lookup_protoid: calloc"); 491 492 return tp; 493 } 494 495 const char * 496 etheraddr_string(netdissect_options *ndo, register const u_char *ep) 497 { 498 register int i; 499 register char *cp; 500 register struct enamemem *tp; 501 int oui; 502 char buf[BUFSIZE]; 503 504 tp = lookup_emem(ndo, ep); 505 if (tp->e_name) 506 return (tp->e_name); 507 #ifdef USE_ETHER_NTOHOST 508 if (!ndo->ndo_nflag) { 509 char buf2[BUFSIZE]; 510 511 if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) { 512 tp->e_name = strdup(buf2); 513 if (tp->e_name == NULL) 514 (*ndo->ndo_error)(ndo, 515 "etheraddr_string: strdup(buf2)"); 516 return (tp->e_name); 517 } 518 } 519 #endif 520 cp = buf; 521 oui = EXTRACT_24BITS(ep); 522 *cp++ = hex[*ep >> 4 ]; 523 *cp++ = hex[*ep++ & 0xf]; 524 for (i = 5; --i >= 0;) { 525 *cp++ = ':'; 526 *cp++ = hex[*ep >> 4 ]; 527 *cp++ = hex[*ep++ & 0xf]; 528 } 529 530 if (!ndo->ndo_nflag) { 531 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)", 532 tok2str(oui_values, "Unknown", oui)); 533 } else 534 *cp = '\0'; 535 tp->e_name = strdup(buf); 536 if (tp->e_name == NULL) 537 (*ndo->ndo_error)(ndo, "etheraddr_string: strdup(buf)"); 538 return (tp->e_name); 539 } 540 541 const char * 542 le64addr_string(netdissect_options *ndo, const u_char *ep) 543 { 544 const unsigned int len = 8; 545 register u_int i; 546 register char *cp; 547 register struct bsnamemem *tp; 548 char buf[BUFSIZE]; 549 550 tp = lookup_bytestring(ndo, ep, len); 551 if (tp->bs_name) 552 return (tp->bs_name); 553 554 cp = buf; 555 for (i = len; i > 0 ; --i) { 556 *cp++ = hex[*(ep + i - 1) >> 4]; 557 *cp++ = hex[*(ep + i - 1) & 0xf]; 558 *cp++ = ':'; 559 } 560 cp --; 561 562 *cp = '\0'; 563 564 tp->bs_name = strdup(buf); 565 if (tp->bs_name == NULL) 566 (*ndo->ndo_error)(ndo, "le64addr_string: strdup(buf)"); 567 568 return (tp->bs_name); 569 } 570 571 const char * 572 linkaddr_string(netdissect_options *ndo, const u_char *ep, 573 const unsigned int type, const unsigned int len) 574 { 575 register u_int i; 576 register char *cp; 577 register struct bsnamemem *tp; 578 579 if (len == 0) 580 return ("<empty>"); 581 582 if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN) 583 return (etheraddr_string(ndo, ep)); 584 585 if (type == LINKADDR_FRELAY) 586 return (q922_string(ndo, ep, len)); 587 588 tp = lookup_bytestring(ndo, ep, len); 589 if (tp->bs_name) 590 return (tp->bs_name); 591 592 tp->bs_name = cp = (char *)malloc(len*3); 593 if (tp->bs_name == NULL) 594 (*ndo->ndo_error)(ndo, "linkaddr_string: malloc"); 595 *cp++ = hex[*ep >> 4]; 596 *cp++ = hex[*ep++ & 0xf]; 597 for (i = len-1; i > 0 ; --i) { 598 *cp++ = ':'; 599 *cp++ = hex[*ep >> 4]; 600 *cp++ = hex[*ep++ & 0xf]; 601 } 602 *cp = '\0'; 603 return (tp->bs_name); 604 } 605 606 const char * 607 etherproto_string(netdissect_options *ndo, u_short port) 608 { 609 register char *cp; 610 register struct hnamemem *tp; 611 register uint32_t i = port; 612 char buf[sizeof("0000")]; 613 614 for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 615 if (tp->addr == i) 616 return (tp->name); 617 618 tp->addr = i; 619 tp->nxt = newhnamemem(ndo); 620 621 cp = buf; 622 NTOHS(port); 623 *cp++ = hex[port >> 12 & 0xf]; 624 *cp++ = hex[port >> 8 & 0xf]; 625 *cp++ = hex[port >> 4 & 0xf]; 626 *cp++ = hex[port & 0xf]; 627 *cp++ = '\0'; 628 tp->name = strdup(buf); 629 if (tp->name == NULL) 630 (*ndo->ndo_error)(ndo, "etherproto_string: strdup(buf)"); 631 return (tp->name); 632 } 633 634 const char * 635 protoid_string(netdissect_options *ndo, register const u_char *pi) 636 { 637 register u_int i, j; 638 register char *cp; 639 register struct protoidmem *tp; 640 char buf[sizeof("00:00:00:00:00")]; 641 642 tp = lookup_protoid(ndo, pi); 643 if (tp->p_name) 644 return tp->p_name; 645 646 cp = buf; 647 if ((j = *pi >> 4) != 0) 648 *cp++ = hex[j]; 649 *cp++ = hex[*pi++ & 0xf]; 650 for (i = 4; (int)--i >= 0;) { 651 *cp++ = ':'; 652 if ((j = *pi >> 4) != 0) 653 *cp++ = hex[j]; 654 *cp++ = hex[*pi++ & 0xf]; 655 } 656 *cp = '\0'; 657 tp->p_name = strdup(buf); 658 if (tp->p_name == NULL) 659 (*ndo->ndo_error)(ndo, "protoid_string: strdup(buf)"); 660 return (tp->p_name); 661 } 662 663 #define ISONSAP_MAX_LENGTH 20 664 const char * 665 isonsap_string(netdissect_options *ndo, const u_char *nsap, 666 register u_int nsap_length) 667 { 668 register u_int nsap_idx; 669 register char *cp; 670 register struct enamemem *tp; 671 672 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH) 673 return ("isonsap_string: illegal length"); 674 675 tp = lookup_nsap(ndo, nsap, nsap_length); 676 if (tp->e_name) 677 return tp->e_name; 678 679 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")); 680 if (cp == NULL) 681 (*ndo->ndo_error)(ndo, "isonsap_string: malloc"); 682 683 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) { 684 *cp++ = hex[*nsap >> 4]; 685 *cp++ = hex[*nsap++ & 0xf]; 686 if (((nsap_idx & 1) == 0) && 687 (nsap_idx + 1 < nsap_length)) { 688 *cp++ = '.'; 689 } 690 } 691 *cp = '\0'; 692 return (tp->e_name); 693 } 694 695 const char * 696 tcpport_string(netdissect_options *ndo, u_short port) 697 { 698 register struct hnamemem *tp; 699 register uint32_t i = port; 700 char buf[sizeof("00000")]; 701 702 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 703 if (tp->addr == i) 704 return (tp->name); 705 706 tp->addr = i; 707 tp->nxt = newhnamemem(ndo); 708 709 (void)snprintf(buf, sizeof(buf), "%u", i); 710 tp->name = strdup(buf); 711 if (tp->name == NULL) 712 (*ndo->ndo_error)(ndo, "tcpport_string: strdup(buf)"); 713 return (tp->name); 714 } 715 716 const char * 717 udpport_string(netdissect_options *ndo, register u_short port) 718 { 719 register struct hnamemem *tp; 720 register uint32_t i = port; 721 char buf[sizeof("00000")]; 722 723 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 724 if (tp->addr == i) 725 return (tp->name); 726 727 tp->addr = i; 728 tp->nxt = newhnamemem(ndo); 729 730 (void)snprintf(buf, sizeof(buf), "%u", i); 731 tp->name = strdup(buf); 732 if (tp->name == NULL) 733 (*ndo->ndo_error)(ndo, "udpport_string: strdup(buf)"); 734 return (tp->name); 735 } 736 737 const char * 738 ipxsap_string(netdissect_options *ndo, u_short port) 739 { 740 register char *cp; 741 register struct hnamemem *tp; 742 register uint32_t i = port; 743 char buf[sizeof("0000")]; 744 745 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) 746 if (tp->addr == i) 747 return (tp->name); 748 749 tp->addr = i; 750 tp->nxt = newhnamemem(ndo); 751 752 cp = buf; 753 NTOHS(port); 754 *cp++ = hex[port >> 12 & 0xf]; 755 *cp++ = hex[port >> 8 & 0xf]; 756 *cp++ = hex[port >> 4 & 0xf]; 757 *cp++ = hex[port & 0xf]; 758 *cp++ = '\0'; 759 tp->name = strdup(buf); 760 if (tp->name == NULL) 761 (*ndo->ndo_error)(ndo, "ipxsap_string: strdup(buf)"); 762 return (tp->name); 763 } 764 765 static void 766 init_servarray(netdissect_options *ndo) 767 { 768 struct servent *sv; 769 register struct hnamemem *table; 770 register int i; 771 char buf[sizeof("0000000000")]; 772 773 while ((sv = getservent()) != NULL) { 774 int port = ntohs(sv->s_port); 775 i = port & (HASHNAMESIZE-1); 776 if (strcmp(sv->s_proto, "tcp") == 0) 777 table = &tporttable[i]; 778 else if (strcmp(sv->s_proto, "udp") == 0) 779 table = &uporttable[i]; 780 else 781 continue; 782 783 while (table->name) 784 table = table->nxt; 785 if (ndo->ndo_nflag) { 786 (void)snprintf(buf, sizeof(buf), "%d", port); 787 table->name = strdup(buf); 788 } else 789 table->name = strdup(sv->s_name); 790 if (table->name == NULL) 791 (*ndo->ndo_error)(ndo, "init_servarray: strdup"); 792 793 table->addr = port; 794 table->nxt = newhnamemem(ndo); 795 } 796 endservent(); 797 } 798 799 static const struct eproto { 800 const char *s; 801 u_short p; 802 } eproto_db[] = { 803 { "pup", ETHERTYPE_PUP }, 804 { "xns", ETHERTYPE_NS }, 805 { "ip", ETHERTYPE_IP }, 806 { "ip6", ETHERTYPE_IPV6 }, 807 { "arp", ETHERTYPE_ARP }, 808 { "rarp", ETHERTYPE_REVARP }, 809 { "sprite", ETHERTYPE_SPRITE }, 810 { "mopdl", ETHERTYPE_MOPDL }, 811 { "moprc", ETHERTYPE_MOPRC }, 812 { "decnet", ETHERTYPE_DN }, 813 { "lat", ETHERTYPE_LAT }, 814 { "sca", ETHERTYPE_SCA }, 815 { "lanbridge", ETHERTYPE_LANBRIDGE }, 816 { "vexp", ETHERTYPE_VEXP }, 817 { "vprod", ETHERTYPE_VPROD }, 818 { "atalk", ETHERTYPE_ATALK }, 819 { "atalkarp", ETHERTYPE_AARP }, 820 { "loopback", ETHERTYPE_LOOPBACK }, 821 { "decdts", ETHERTYPE_DECDTS }, 822 { "decdns", ETHERTYPE_DECDNS }, 823 { (char *)0, 0 } 824 }; 825 826 static void 827 init_eprotoarray(netdissect_options *ndo) 828 { 829 register int i; 830 register struct hnamemem *table; 831 832 for (i = 0; eproto_db[i].s; i++) { 833 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1); 834 table = &eprototable[j]; 835 while (table->name) 836 table = table->nxt; 837 table->name = eproto_db[i].s; 838 table->addr = htons(eproto_db[i].p); 839 table->nxt = newhnamemem(ndo); 840 } 841 } 842 843 static const struct protoidlist { 844 const u_char protoid[5]; 845 const char *name; 846 } protoidlist[] = { 847 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" }, 848 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" }, 849 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" }, 850 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" }, 851 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" }, 852 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 853 }; 854 855 /* 856 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet 857 * types. 858 */ 859 static void 860 init_protoidarray(netdissect_options *ndo) 861 { 862 register int i; 863 register struct protoidmem *tp; 864 const struct protoidlist *pl; 865 u_char protoid[5]; 866 867 protoid[0] = 0; 868 protoid[1] = 0; 869 protoid[2] = 0; 870 for (i = 0; eproto_db[i].s; i++) { 871 u_short etype = htons(eproto_db[i].p); 872 873 memcpy((char *)&protoid[3], (char *)&etype, 2); 874 tp = lookup_protoid(ndo, protoid); 875 tp->p_name = strdup(eproto_db[i].s); 876 if (tp->p_name == NULL) 877 (*ndo->ndo_error)(ndo, 878 "init_protoidarray: strdup(eproto_db[i].s)"); 879 } 880 /* Hardwire some SNAP proto ID names */ 881 for (pl = protoidlist; pl->name != NULL; ++pl) { 882 tp = lookup_protoid(ndo, pl->protoid); 883 /* Don't override existing name */ 884 if (tp->p_name != NULL) 885 continue; 886 887 tp->p_name = pl->name; 888 } 889 } 890 891 static const struct etherlist { 892 const u_char addr[6]; 893 const char *name; 894 } etherlist[] = { 895 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" }, 896 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL } 897 }; 898 899 /* 900 * Initialize the ethers hash table. We take two different approaches 901 * depending on whether or not the system provides the ethers name 902 * service. If it does, we just wire in a few names at startup, 903 * and etheraddr_string() fills in the table on demand. If it doesn't, 904 * then we suck in the entire /etc/ethers file at startup. The idea 905 * is that parsing the local file will be fast, but spinning through 906 * all the ethers entries via NIS & next_etherent might be very slow. 907 * 908 * XXX pcap_next_etherent doesn't belong in the pcap interface, but 909 * since the pcap module already does name-to-address translation, 910 * it's already does most of the work for the ethernet address-to-name 911 * translation, so we just pcap_next_etherent as a convenience. 912 */ 913 static void 914 init_etherarray(netdissect_options *ndo) 915 { 916 register const struct etherlist *el; 917 register struct enamemem *tp; 918 #ifdef USE_ETHER_NTOHOST 919 char name[256]; 920 #else 921 register struct pcap_etherent *ep; 922 register FILE *fp; 923 924 /* Suck in entire ethers file */ 925 fp = fopen(PCAP_ETHERS_FILE, "r"); 926 if (fp != NULL) { 927 while ((ep = pcap_next_etherent(fp)) != NULL) { 928 tp = lookup_emem(ndo, ep->addr); 929 tp->e_name = strdup(ep->name); 930 if (tp->e_name == NULL) 931 (*ndo->ndo_error)(ndo, 932 "init_etherarray: strdup(ep->addr)"); 933 } 934 (void)fclose(fp); 935 } 936 #endif 937 938 /* Hardwire some ethernet names */ 939 for (el = etherlist; el->name != NULL; ++el) { 940 tp = lookup_emem(ndo, el->addr); 941 /* Don't override existing name */ 942 if (tp->e_name != NULL) 943 continue; 944 945 #ifdef USE_ETHER_NTOHOST 946 /* 947 * Use YP/NIS version of name if available. 948 */ 949 if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) { 950 tp->e_name = strdup(name); 951 if (tp->e_name == NULL) 952 (*ndo->ndo_error)(ndo, 953 "init_etherarray: strdup(name)"); 954 continue; 955 } 956 #endif 957 tp->e_name = el->name; 958 } 959 } 960 961 static const struct tok ipxsap_db[] = { 962 { 0x0000, "Unknown" }, 963 { 0x0001, "User" }, 964 { 0x0002, "User Group" }, 965 { 0x0003, "PrintQueue" }, 966 { 0x0004, "FileServer" }, 967 { 0x0005, "JobServer" }, 968 { 0x0006, "Gateway" }, 969 { 0x0007, "PrintServer" }, 970 { 0x0008, "ArchiveQueue" }, 971 { 0x0009, "ArchiveServer" }, 972 { 0x000a, "JobQueue" }, 973 { 0x000b, "Administration" }, 974 { 0x000F, "Novell TI-RPC" }, 975 { 0x0017, "Diagnostics" }, 976 { 0x0020, "NetBIOS" }, 977 { 0x0021, "NAS SNA Gateway" }, 978 { 0x0023, "NACS AsyncGateway" }, 979 { 0x0024, "RemoteBridge/RoutingService" }, 980 { 0x0026, "BridgeServer" }, 981 { 0x0027, "TCP/IP Gateway" }, 982 { 0x0028, "Point-to-point X.25 BridgeServer" }, 983 { 0x0029, "3270 Gateway" }, 984 { 0x002a, "CHI Corp" }, 985 { 0x002c, "PC Chalkboard" }, 986 { 0x002d, "TimeSynchServer" }, 987 { 0x002e, "ARCserve5.0/PalindromeBackup" }, 988 { 0x0045, "DI3270 Gateway" }, 989 { 0x0047, "AdvertisingPrintServer" }, 990 { 0x004a, "NetBlazerModems" }, 991 { 0x004b, "BtrieveVAP" }, 992 { 0x004c, "NetwareSQL" }, 993 { 0x004d, "XtreeNetwork" }, 994 { 0x0050, "BtrieveVAP4.11" }, 995 { 0x0052, "QuickLink" }, 996 { 0x0053, "PrintQueueUser" }, 997 { 0x0058, "Multipoint X.25 Router" }, 998 { 0x0060, "STLB/NLM" }, 999 { 0x0064, "ARCserve" }, 1000 { 0x0066, "ARCserve3.0" }, 1001 { 0x0072, "WAN CopyUtility" }, 1002 { 0x007a, "TES-NetwareVMS" }, 1003 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" }, 1004 { 0x0095, "DDA OBGYN" }, 1005 { 0x0098, "NetwareAccessServer" }, 1006 { 0x009a, "Netware for VMS II/NamedPipeServer" }, 1007 { 0x009b, "NetwareAccessServer" }, 1008 { 0x009e, "PortableNetwareServer/SunLinkNVT" }, 1009 { 0x00a1, "PowerchuteAPC UPS" }, 1010 { 0x00aa, "LAWserve" }, 1011 { 0x00ac, "CompaqIDA StatusMonitor" }, 1012 { 0x0100, "PIPE STAIL" }, 1013 { 0x0102, "LAN ProtectBindery" }, 1014 { 0x0103, "OracleDataBaseServer" }, 1015 { 0x0107, "Netware386/RSPX RemoteConsole" }, 1016 { 0x010f, "NovellSNA Gateway" }, 1017 { 0x0111, "TestServer" }, 1018 { 0x0112, "HP PrintServer" }, 1019 { 0x0114, "CSA MUX" }, 1020 { 0x0115, "CSA LCA" }, 1021 { 0x0116, "CSA CM" }, 1022 { 0x0117, "CSA SMA" }, 1023 { 0x0118, "CSA DBA" }, 1024 { 0x0119, "CSA NMA" }, 1025 { 0x011a, "CSA SSA" }, 1026 { 0x011b, "CSA STATUS" }, 1027 { 0x011e, "CSA APPC" }, 1028 { 0x0126, "SNA TEST SSA Profile" }, 1029 { 0x012a, "CSA TRACE" }, 1030 { 0x012b, "NetwareSAA" }, 1031 { 0x012e, "IKARUS VirusScan" }, 1032 { 0x0130, "CommunicationsExecutive" }, 1033 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" }, 1034 { 0x0135, "NetwareNamingServicesProfile" }, 1035 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" }, 1036 { 0x0141, "LAN SpoolServer" }, 1037 { 0x0152, "IRMALAN Gateway" }, 1038 { 0x0154, "NamedPipeServer" }, 1039 { 0x0166, "NetWareManagement" }, 1040 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" }, 1041 { 0x0173, "Compaq" }, 1042 { 0x0174, "Compaq SNMP Agent" }, 1043 { 0x0175, "Compaq" }, 1044 { 0x0180, "XTreeServer/XTreeTools" }, 1045 { 0x018A, "NASI ServicesBroadcastServer" }, 1046 { 0x01b0, "GARP Gateway" }, 1047 { 0x01b1, "Binfview" }, 1048 { 0x01bf, "IntelLanDeskManager" }, 1049 { 0x01ca, "AXTEC" }, 1050 { 0x01cb, "ShivaNetModem/E" }, 1051 { 0x01cc, "ShivaLanRover/E" }, 1052 { 0x01cd, "ShivaLanRover/T" }, 1053 { 0x01ce, "ShivaUniversal" }, 1054 { 0x01d8, "CastelleFAXPressServer" }, 1055 { 0x01da, "CastelleLANPressPrintServer" }, 1056 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" }, 1057 { 0x01f0, "LEGATO" }, 1058 { 0x01f5, "LEGATO" }, 1059 { 0x0233, "NMS Agent/NetwareManagementAgent" }, 1060 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" }, 1061 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" }, 1062 { 0x023a, "LANtern" }, 1063 { 0x023c, "MAVERICK" }, 1064 { 0x023f, "NovellSMDR" }, 1065 { 0x024e, "NetwareConnect" }, 1066 { 0x024f, "NASI ServerBroadcast Cisco" }, 1067 { 0x026a, "NMS ServiceConsole" }, 1068 { 0x026b, "TimeSynchronizationServer Netware 4.x" }, 1069 { 0x0278, "DirectoryServer Netware 4.x" }, 1070 { 0x027b, "NetwareManagementAgent" }, 1071 { 0x0280, "Novell File and Printer Sharing Service for PC" }, 1072 { 0x0304, "NovellSAA Gateway" }, 1073 { 0x0308, "COM/VERMED" }, 1074 { 0x030a, "GalacticommWorldgroupServer" }, 1075 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" }, 1076 { 0x0320, "AttachmateGateway" }, 1077 { 0x0327, "MicrosoftDiagnostiocs" }, 1078 { 0x0328, "WATCOM SQL Server" }, 1079 { 0x0335, "MultiTechSystems MultisynchCommServer" }, 1080 { 0x0343, "Xylogics RemoteAccessServer/LANModem" }, 1081 { 0x0355, "ArcadaBackupExec" }, 1082 { 0x0358, "MSLCD1" }, 1083 { 0x0361, "NETINELO" }, 1084 { 0x037e, "Powerchute UPS Monitoring" }, 1085 { 0x037f, "ViruSafeNotify" }, 1086 { 0x0386, "HP Bridge" }, 1087 { 0x0387, "HP Hub" }, 1088 { 0x0394, "NetWare SAA Gateway" }, 1089 { 0x039b, "LotusNotes" }, 1090 { 0x03b7, "CertusAntiVirus" }, 1091 { 0x03c4, "ARCserve4.0" }, 1092 { 0x03c7, "LANspool3.5" }, 1093 { 0x03d7, "LexmarkPrinterServer" }, 1094 { 0x03d8, "LexmarkXLE PrinterServer" }, 1095 { 0x03dd, "BanyanENS NetwareClient" }, 1096 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" }, 1097 { 0x03e1, "UnivelUnixware" }, 1098 { 0x03e4, "UnivelUnixware" }, 1099 { 0x03fc, "IntelNetport" }, 1100 { 0x03fd, "PrintServerQueue" }, 1101 { 0x040A, "ipnServer" }, 1102 { 0x040D, "LVERRMAN" }, 1103 { 0x040E, "LVLIC" }, 1104 { 0x0414, "NET Silicon (DPI)/Kyocera" }, 1105 { 0x0429, "SiteLockVirus" }, 1106 { 0x0432, "UFHELPR???" }, 1107 { 0x0433, "Synoptics281xAdvancedSNMPAgent" }, 1108 { 0x0444, "MicrosoftNT SNA Server" }, 1109 { 0x0448, "Oracle" }, 1110 { 0x044c, "ARCserve5.01" }, 1111 { 0x0457, "CanonGP55" }, 1112 { 0x045a, "QMS Printers" }, 1113 { 0x045b, "DellSCSI Array" }, 1114 { 0x0491, "NetBlazerModems" }, 1115 { 0x04ac, "OnTimeScheduler" }, 1116 { 0x04b0, "CD-Net" }, 1117 { 0x0513, "EmulexNQA" }, 1118 { 0x0520, "SiteLockChecks" }, 1119 { 0x0529, "SiteLockChecks" }, 1120 { 0x052d, "CitrixOS2 AppServer" }, 1121 { 0x0535, "Tektronix" }, 1122 { 0x0536, "Milan" }, 1123 { 0x055d, "Attachmate SNA gateway" }, 1124 { 0x056b, "IBM8235 ModemServer" }, 1125 { 0x056c, "ShivaLanRover/E PLUS" }, 1126 { 0x056d, "ShivaLanRover/T PLUS" }, 1127 { 0x0580, "McAfeeNetShield" }, 1128 { 0x05B8, "NLM to workstation communication (Revelation Software)" }, 1129 { 0x05BA, "CompatibleSystemsRouters" }, 1130 { 0x05BE, "CheyenneHierarchicalStorageManager" }, 1131 { 0x0606, "JCWatermarkImaging" }, 1132 { 0x060c, "AXISNetworkPrinter" }, 1133 { 0x0610, "AdaptecSCSIManagement" }, 1134 { 0x0621, "IBM AntiVirus" }, 1135 { 0x0640, "Windows95 RemoteRegistryService" }, 1136 { 0x064e, "MicrosoftIIS" }, 1137 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1138 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" }, 1139 { 0x076C, "Xerox" }, 1140 { 0x079b, "ShivaLanRover/E 115" }, 1141 { 0x079c, "ShivaLanRover/T 115" }, 1142 { 0x07B4, "CubixWorldDesk" }, 1143 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" }, 1144 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" }, 1145 { 0x0810, "ELAN License Server Demo" }, 1146 { 0x0824, "ShivaLanRoverAccessSwitch/E" }, 1147 { 0x086a, "ISSC Collector" }, 1148 { 0x087f, "ISSC DAS AgentAIX" }, 1149 { 0x0880, "Intel Netport PRO" }, 1150 { 0x0881, "Intel Netport PRO" }, 1151 { 0x0b29, "SiteLock" }, 1152 { 0x0c29, "SiteLockApplications" }, 1153 { 0x0c2c, "LicensingServer" }, 1154 { 0x2101, "PerformanceTechnologyInstantInternet" }, 1155 { 0x2380, "LAI SiteLock" }, 1156 { 0x238c, "MeetingMaker" }, 1157 { 0x4808, "SiteLockServer/SiteLockMetering" }, 1158 { 0x5555, "SiteLockUser" }, 1159 { 0x6312, "Tapeware" }, 1160 { 0x6f00, "RabbitGateway" }, 1161 { 0x7703, "MODEM" }, 1162 { 0x8002, "NetPortPrinters" }, 1163 { 0x8008, "WordPerfectNetworkVersion" }, 1164 { 0x85BE, "Cisco EIGRP" }, 1165 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" }, 1166 { 0x9000, "McAfeeNetShield" }, 1167 { 0x9604, "CSA-NT_MON" }, 1168 { 0xb6a8, "OceanIsleReachoutRemoteControl" }, 1169 { 0xf11f, "SiteLockMetering" }, 1170 { 0xf1ff, "SiteLock" }, 1171 { 0xf503, "Microsoft SQL Server" }, 1172 { 0xF905, "IBM TimeAndPlace" }, 1173 { 0xfbfb, "TopCallIII FaxServer" }, 1174 { 0xffff, "AnyService/Wildcard" }, 1175 { 0, (char *)0 } 1176 }; 1177 1178 static void 1179 init_ipxsaparray(netdissect_options *ndo) 1180 { 1181 register int i; 1182 register struct hnamemem *table; 1183 1184 for (i = 0; ipxsap_db[i].s != NULL; i++) { 1185 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1); 1186 table = &ipxsaptable[j]; 1187 while (table->name) 1188 table = table->nxt; 1189 table->name = ipxsap_db[i].s; 1190 table->addr = htons(ipxsap_db[i].v); 1191 table->nxt = newhnamemem(ndo); 1192 } 1193 } 1194 1195 /* 1196 * Initialize the address to name translation machinery. We map all 1197 * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true 1198 * (i.e., to prevent blocking on the nameserver). localnet is the IP address 1199 * of the local network. mask is its subnet mask. 1200 */ 1201 void 1202 init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask) 1203 { 1204 if (ndo->ndo_fflag) { 1205 f_localnet = localnet; 1206 f_netmask = mask; 1207 } 1208 if (ndo->ndo_nflag) 1209 /* 1210 * Simplest way to suppress names. 1211 */ 1212 return; 1213 1214 init_etherarray(ndo); 1215 init_servarray(ndo); 1216 init_eprotoarray(ndo); 1217 init_protoidarray(ndo); 1218 init_ipxsaparray(ndo); 1219 } 1220 1221 const char * 1222 dnaddr_string(netdissect_options *ndo, u_short dnaddr) 1223 { 1224 register struct hnamemem *tp; 1225 1226 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL; 1227 tp = tp->nxt) 1228 if (tp->addr == dnaddr) 1229 return (tp->name); 1230 1231 tp->addr = dnaddr; 1232 tp->nxt = newhnamemem(ndo); 1233 tp->name = dnnum_string(ndo, dnaddr); 1234 1235 return(tp->name); 1236 } 1237 1238 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */ 1239 struct hnamemem * 1240 newhnamemem(netdissect_options *ndo) 1241 { 1242 register struct hnamemem *p; 1243 static struct hnamemem *ptr = NULL; 1244 static u_int num = 0; 1245 1246 if (num <= 0) { 1247 num = 64; 1248 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr)); 1249 if (ptr == NULL) 1250 (*ndo->ndo_error)(ndo, "newhnamemem: calloc"); 1251 } 1252 --num; 1253 p = ptr++; 1254 return (p); 1255 } 1256 1257 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */ 1258 struct h6namemem * 1259 newh6namemem(netdissect_options *ndo) 1260 { 1261 register struct h6namemem *p; 1262 static struct h6namemem *ptr = NULL; 1263 static u_int num = 0; 1264 1265 if (num <= 0) { 1266 num = 64; 1267 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr)); 1268 if (ptr == NULL) 1269 (*ndo->ndo_error)(ndo, "newh6namemem: calloc"); 1270 } 1271 --num; 1272 p = ptr++; 1273 return (p); 1274 } 1275 1276 /* Represent TCI part of the 802.1Q 4-octet tag as text. */ 1277 const char * 1278 ieee8021q_tci_string(const uint16_t tci) 1279 { 1280 static char buf[128]; 1281 snprintf(buf, sizeof(buf), "vlan %u, p %u%s", 1282 tci & 0xfff, 1283 tci >> 13, 1284 (tci & 0x1000) ? ", DEI" : ""); 1285 return buf; 1286 } 1287