The Tcpdump Group git mirrors - tcpdump/blob - addrtoname.c

   1 /*
   2  * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  *
  21  *  Internet, ethernet, port, and protocol string to address
  22  *  and address to string conversion routines
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #ifdef HAVE_CASPER
  30 #include <libcasper.h>
  31 #include <casper/cap_dns.h>
  32 #endif /* HAVE_CASPER */
  33
  34 #include <netdissect-stdinc.h>
  35
  36 #ifdef USE_ETHER_NTOHOST
  37 #ifdef HAVE_NETINET_IF_ETHER_H
  38 struct mbuf;            /* Squelch compiler warnings on some platforms for */
  39 struct rtentry;         /* declarations in <net/if.h> */
  40 #include <net/if.h>     /* for "struct ifnet" in "struct arpcom" on Solaris */
  41 #include <netinet/if_ether.h>
  42 #endif /* HAVE_NETINET_IF_ETHER_H */
  43 #ifdef NETINET_ETHER_H_DECLARES_ETHER_NTOHOST
  44 #include <netinet/ether.h>
  45 #endif /* NETINET_ETHER_H_DECLARES_ETHER_NTOHOST */
  46
  47 #if !defined(HAVE_DECL_ETHER_NTOHOST) || !HAVE_DECL_ETHER_NTOHOST
  48 #ifndef HAVE_STRUCT_ETHER_ADDR
  49 struct ether_addr {
  50         unsigned char ether_addr_octet[6];
  51 };
  52 #endif
  53 extern int ether_ntohost(char *, const struct ether_addr *);
  54 #endif
  55
  56 #endif /* USE_ETHER_NTOHOST */
  57
  58 #include <pcap.h>
  59 #include <pcap-namedb.h>
  60 #include <signal.h>
  61 #include <stdio.h>
  62 #include <string.h>
  63 #include <stdlib.h>
  64
  65 #include "netdissect.h"
  66 #include "addrtoname.h"
  67 #include "addrtostr.h"
  68 #include "ethertype.h"
  69 #include "llc.h"
  70 #include "setsignal.h"
  71 #include "extract.h"
  72 #include "oui.h"
  73
  74 #ifndef ETHER_ADDR_LEN
  75 #define ETHER_ADDR_LEN  6
  76 #endif
  77
  78 /*
  79  * hash tables for whatever-to-name translations
  80  *
  81  * ndo_error() called on strdup(3) failure
  82  */
  83
  84 #define HASHNAMESIZE 4096
  85
  86 struct hnamemem {
  87         uint32_t addr;
  88         const char *name;
  89         struct hnamemem *nxt;
  90 };
  91
  92 static struct hnamemem hnametable[HASHNAMESIZE];
  93 static struct hnamemem tporttable[HASHNAMESIZE];
  94 static struct hnamemem uporttable[HASHNAMESIZE];
  95 static struct hnamemem eprototable[HASHNAMESIZE];
  96 static struct hnamemem dnaddrtable[HASHNAMESIZE];
  97 static struct hnamemem ipxsaptable[HASHNAMESIZE];
  98
  99 #ifdef _WIN32
 100 /*
 101  * fake gethostbyaddr for Win2k/XP
 102  * gethostbyaddr() returns incorrect value when AF_INET6 is passed
 103  * to 3rd argument.
 104  *
 105  * h_name in struct hostent is only valid.
 106  */
 107 static struct hostent *
 108 win32_gethostbyaddr(const char *addr, int len, int type)
 109 {
 110         static struct hostent host;
 111         static char hostbuf[NI_MAXHOST];
 112         char hname[NI_MAXHOST];
 113         struct sockaddr_in6 addr6;
 114
 115         host.h_name = hostbuf;
 116         switch (type) {
 117         case AF_INET:
 118                 return gethostbyaddr(addr, len, type);
 119                 break;
 120         case AF_INET6:
 121                 memset(&addr6, 0, sizeof(addr6));
 122                 addr6.sin6_family = AF_INET6;
 123                 memcpy(&addr6.sin6_addr, addr, len);
 124                 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
 125                     hname, sizeof(hname), NULL, 0, 0)) {
 126                         return NULL;
 127                 } else {
 128                         strcpy(host.h_name, hname);
 129                         return &host;
 130                 }
 131                 break;
 132         default:
 133                 return NULL;
 134         }
 135 }
 136 #define gethostbyaddr win32_gethostbyaddr
 137 #endif /* _WIN32 */
 138
 139 struct h6namemem {
 140         struct in6_addr addr;
 141         char *name;
 142         struct h6namemem *nxt;
 143 };
 144
 145 static struct h6namemem h6nametable[HASHNAMESIZE];
 146
 147 struct enamemem {
 148         u_short e_addr0;
 149         u_short e_addr1;
 150         u_short e_addr2;
 151         const char *e_name;
 152         u_char *e_nsap;                 /* used only for nsaptable[] */
 153 #define e_bs e_nsap                     /* for bytestringtable */
 154         struct enamemem *e_nxt;
 155 };
 156
 157 static struct enamemem enametable[HASHNAMESIZE];
 158 static struct enamemem nsaptable[HASHNAMESIZE];
 159 static struct enamemem bytestringtable[HASHNAMESIZE];
 160
 161 struct protoidmem {
 162         uint32_t p_oui;
 163         u_short p_proto;
 164         const char *p_name;
 165         struct protoidmem *p_nxt;
 166 };
 167
 168 static struct protoidmem protoidtable[HASHNAMESIZE];
 169
 170 /*
 171  * A faster replacement for inet_ntoa().
 172  */
 173 const char *
 174 intoa(uint32_t addr)
 175 {
 176         register char *cp;
 177         register u_int byte;
 178         register int n;
 179         static char buf[sizeof(".xxx.xxx.xxx.xxx")];
 180
 181         NTOHL(addr);
 182         cp = buf + sizeof(buf);
 183         *--cp = '\0';
 184
 185         n = 4;
 186         do {
 187                 byte = addr & 0xff;
 188                 *--cp = byte % 10 + '0';
 189                 byte /= 10;
 190                 if (byte > 0) {
 191                         *--cp = byte % 10 + '0';
 192                         byte /= 10;
 193                         if (byte > 0)
 194                                 *--cp = byte + '0';
 195                 }
 196                 *--cp = '.';
 197                 addr >>= 8;
 198         } while (--n > 0);
 199
 200         return cp + 1;
 201 }
 202
 203 static uint32_t f_netmask;
 204 static uint32_t f_localnet;
 205 #ifdef HAVE_CASPER
 206 extern cap_channel_t *capdns;
 207 #endif
 208
 209 /*
 210  * Return a name for the IP address pointed to by ap.  This address
 211  * is assumed to be in network byte order.
 212  *
 213  * NOTE: ap is *NOT* necessarily part of the packet data (not even if
 214  * this is being called with the "ipaddr_string()" macro), so you
 215  * *CANNOT* use the ND_TCHECK{2}/ND_TTEST{2} macros on it.  Furthermore,
 216  * even in cases where it *is* part of the packet data, the caller
 217  * would still have to check for a null return value, even if it's
 218  * just printing the return value with "%s" - not all versions of
 219  * printf print "(null)" with "%s" and a null pointer, some of them
 220  * don't check for a null pointer and crash in that case.
 221  *
 222  * The callers of this routine should, before handing this routine
 223  * a pointer to packet data, be sure that the data is present in
 224  * the packet buffer.  They should probably do those checks anyway,
 225  * as other data at that layer might not be IP addresses, and it
 226  * also needs to check whether they're present in the packet buffer.
 227  */
 228 const char *
 229 getname(netdissect_options *ndo, const u_char *ap)
 230 {
 231         register struct hostent *hp;
 232         uint32_t addr;
 233         struct hnamemem *p;
 234
 235         memcpy(&addr, ap, sizeof(addr));
 236         p = &hnametable[addr & (HASHNAMESIZE-1)];
 237         for (; p->nxt; p = p->nxt) {
 238                 if (p->addr == addr)
 239                         return (p->name);
 240         }
 241         p->addr = addr;
 242         p->nxt = newhnamemem(ndo);
 243
 244         /*
 245          * Print names unless:
 246          *      (1) -n was given.
 247          *      (2) Address is foreign and -f was given. (If -f was not
 248          *          given, f_netmask and f_localnet are 0 and the test
 249          *          evaluates to true)
 250          */
 251         if (!ndo->ndo_nflag &&
 252             (addr & f_netmask) == f_localnet) {
 253 #ifdef HAVE_CASPER
 254                 if (capdns != NULL) {
 255                         hp = cap_gethostbyaddr(capdns, (char *)&addr, 4,
 256                             AF_INET);
 257                 } else
 258 #endif
 259                         hp = gethostbyaddr((char *)&addr, 4, AF_INET);
 260                 if (hp) {
 261                         char *dotp;
 262
 263                         p->name = strdup(hp->h_name);
 264                         if (p->name == NULL)
 265                                 (*ndo->ndo_error)(ndo,
 266                                                   "getname: strdup(hp->h_name)");
 267                         if (ndo->ndo_Nflag) {
 268                                 /* Remove domain qualifications */
 269                                 dotp = strchr(p->name, '.');
 270                                 if (dotp)
 271                                         *dotp = '\0';
 272                         }
 273                         return (p->name);
 274                 }
 275         }
 276         p->name = strdup(intoa(addr));
 277         if (p->name == NULL)
 278                 (*ndo->ndo_error)(ndo, "getname: strdup(intoa(addr))");
 279         return (p->name);
 280 }
 281
 282 /*
 283  * Return a name for the IP6 address pointed to by ap.  This address
 284  * is assumed to be in network byte order.
 285  */
 286 const char *
 287 getname6(netdissect_options *ndo, const u_char *ap)
 288 {
 289         register struct hostent *hp;
 290         union {
 291                 struct in6_addr addr;
 292                 struct for_hash_addr {
 293                         char fill[14];
 294                         uint16_t d;
 295                 } addra;
 296         } addr;
 297         struct h6namemem *p;
 298         register const char *cp;
 299         char ntop_buf[INET6_ADDRSTRLEN];
 300
 301         memcpy(&addr, ap, sizeof(addr));
 302         p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)];
 303         for (; p->nxt; p = p->nxt) {
 304                 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
 305                         return (p->name);
 306         }
 307         p->addr = addr.addr;
 308         p->nxt = newh6namemem(ndo);
 309
 310         /*
 311          * Do not print names if -n was given.
 312          */
 313         if (!ndo->ndo_nflag) {
 314 #ifdef HAVE_CASPER
 315                 if (capdns != NULL) {
 316                         hp = cap_gethostbyaddr(capdns, (char *)&addr,
 317                             sizeof(addr), AF_INET6);
 318                 } else
 319 #endif
 320                         hp = gethostbyaddr((char *)&addr, sizeof(addr),
 321                             AF_INET6);
 322                 if (hp) {
 323                         char *dotp;
 324
 325                         p->name = strdup(hp->h_name);
 326                         if (p->name == NULL)
 327                                 (*ndo->ndo_error)(ndo,
 328                                                   "getname6: strdup(hp->h_name)");
 329                         if (ndo->ndo_Nflag) {
 330                                 /* Remove domain qualifications */
 331                                 dotp = strchr(p->name, '.');
 332                                 if (dotp)
 333                                         *dotp = '\0';
 334                         }
 335                         return (p->name);
 336                 }
 337         }
 338         cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf));
 339         p->name = strdup(cp);
 340         if (p->name == NULL)
 341                 (*ndo->ndo_error)(ndo, "getname6: strdup(cp)");
 342         return (p->name);
 343 }
 344
 345 static const char hex[] = "0123456789abcdef";
 346
 347
 348 /* Find the hash node that corresponds the ether address 'ep' */
 349
 350 static inline struct enamemem *
 351 lookup_emem(netdissect_options *ndo, const u_char *ep)
 352 {
 353         register u_int i, j, k;
 354         struct enamemem *tp;
 355
 356         k = (ep[0] << 8) | ep[1];
 357         j = (ep[2] << 8) | ep[3];
 358         i = (ep[4] << 8) | ep[5];
 359
 360         tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
 361         while (tp->e_nxt)
 362                 if (tp->e_addr0 == i &&
 363                     tp->e_addr1 == j &&
 364                     tp->e_addr2 == k)
 365                         return tp;
 366                 else
 367                         tp = tp->e_nxt;
 368         tp->e_addr0 = i;
 369         tp->e_addr1 = j;
 370         tp->e_addr2 = k;
 371         tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
 372         if (tp->e_nxt == NULL)
 373                 (*ndo->ndo_error)(ndo, "lookup_emem: calloc");
 374
 375         return tp;
 376 }
 377
 378 /*
 379  * Find the hash node that corresponds to the bytestring 'bs'
 380  * with length 'nlen'
 381  */
 382
 383 static inline struct enamemem *
 384 lookup_bytestring(netdissect_options *ndo, register const u_char *bs,
 385                   const unsigned int nlen)
 386 {
 387         struct enamemem *tp;
 388         register u_int i, j, k;
 389
 390         if (nlen >= 6) {
 391                 k = (bs[0] << 8) | bs[1];
 392                 j = (bs[2] << 8) | bs[3];
 393                 i = (bs[4] << 8) | bs[5];
 394         } else if (nlen >= 4) {
 395                 k = (bs[0] << 8) | bs[1];
 396                 j = (bs[2] << 8) | bs[3];
 397                 i = 0;
 398         } else
 399                 i = j = k = 0;
 400
 401         tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
 402         while (tp->e_nxt)
 403                 if (tp->e_addr0 == i &&
 404                     tp->e_addr1 == j &&
 405                     tp->e_addr2 == k &&
 406                     memcmp((const char *)bs, (const char *)(tp->e_bs), nlen) == 0)
 407                         return tp;
 408                 else
 409                         tp = tp->e_nxt;
 410
 411         tp->e_addr0 = i;
 412         tp->e_addr1 = j;
 413         tp->e_addr2 = k;
 414
 415         tp->e_bs = (u_char *) calloc(1, nlen + 1);
 416         if (tp->e_bs == NULL)
 417                 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc");
 418
 419         memcpy(tp->e_bs, bs, nlen);
 420         tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
 421         if (tp->e_nxt == NULL)
 422                 (*ndo->ndo_error)(ndo, "lookup_bytestring: calloc");
 423
 424         return tp;
 425 }
 426
 427 /* Find the hash node that corresponds the NSAP 'nsap' */
 428
 429 static inline struct enamemem *
 430 lookup_nsap(netdissect_options *ndo, register const u_char *nsap,
 431             register u_int nsap_length)
 432 {
 433         register u_int i, j, k;
 434         struct enamemem *tp;
 435         const u_char *ensap;
 436
 437         if (nsap_length > 6) {
 438                 ensap = nsap + nsap_length - 6;
 439                 k = (ensap[0] << 8) | ensap[1];
 440                 j = (ensap[2] << 8) | ensap[3];
 441                 i = (ensap[4] << 8) | ensap[5];
 442         }
 443         else
 444                 i = j = k = 0;
 445
 446         tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
 447         while (tp->e_nxt)
 448                 if (tp->e_addr0 == i &&
 449                     tp->e_addr1 == j &&
 450                     tp->e_addr2 == k &&
 451                     tp->e_nsap[0] == nsap_length &&
 452                     memcmp((const char *)&(nsap[1]),
 453                         (char *)&(tp->e_nsap[1]), nsap_length) == 0)
 454                         return tp;
 455                 else
 456                         tp = tp->e_nxt;
 457         tp->e_addr0 = i;
 458         tp->e_addr1 = j;
 459         tp->e_addr2 = k;
 460         tp->e_nsap = (u_char *)malloc(nsap_length + 1);
 461         if (tp->e_nsap == NULL)
 462                 (*ndo->ndo_error)(ndo, "lookup_nsap: malloc");
 463         tp->e_nsap[0] = (u_char)nsap_length;    /* guaranteed < ISONSAP_MAX_LENGTH */
 464         memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length);
 465         tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
 466         if (tp->e_nxt == NULL)
 467                 (*ndo->ndo_error)(ndo, "lookup_nsap: calloc");
 468
 469         return tp;
 470 }
 471
 472 /* Find the hash node that corresponds the protoid 'pi'. */
 473
 474 static inline struct protoidmem *
 475 lookup_protoid(netdissect_options *ndo, const u_char *pi)
 476 {
 477         register u_int i, j;
 478         struct protoidmem *tp;
 479
 480         /* 5 octets won't be aligned */
 481         i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
 482         j =   (pi[3] << 8) + pi[4];
 483         /* XXX should be endian-insensitive, but do big-endian testing  XXX */
 484
 485         tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
 486         while (tp->p_nxt)
 487                 if (tp->p_oui == i && tp->p_proto == j)
 488                         return tp;
 489                 else
 490                         tp = tp->p_nxt;
 491         tp->p_oui = i;
 492         tp->p_proto = j;
 493         tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
 494         if (tp->p_nxt == NULL)
 495                 (*ndo->ndo_error)(ndo, "lookup_protoid: calloc");
 496
 497         return tp;
 498 }
 499
 500 const char *
 501 etheraddr_string(netdissect_options *ndo, register const u_char *ep)
 502 {
 503         register int i;
 504         register char *cp;
 505         register struct enamemem *tp;
 506         int oui;
 507         char buf[BUFSIZE];
 508
 509         tp = lookup_emem(ndo, ep);
 510         if (tp->e_name)
 511                 return (tp->e_name);
 512 #ifdef USE_ETHER_NTOHOST
 513         if (!ndo->ndo_nflag) {
 514                 char buf2[BUFSIZE];
 515
 516                 if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) {
 517                         tp->e_name = strdup(buf2);
 518                         if (tp->e_name == NULL)
 519                                 (*ndo->ndo_error)(ndo,
 520                                                   "etheraddr_string: strdup(buf2)");
 521                         return (tp->e_name);
 522                 }
 523         }
 524 #endif
 525         cp = buf;
 526         oui = EXTRACT_24BITS(ep);
 527         *cp++ = hex[*ep >> 4 ];
 528         *cp++ = hex[*ep++ & 0xf];
 529         for (i = 5; --i >= 0;) {
 530                 *cp++ = ':';
 531                 *cp++ = hex[*ep >> 4 ];
 532                 *cp++ = hex[*ep++ & 0xf];
 533         }
 534
 535         if (!ndo->ndo_nflag) {
 536                 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)",
 537                     tok2str(oui_values, "Unknown", oui));
 538         } else
 539                 *cp = '\0';
 540         tp->e_name = strdup(buf);
 541         if (tp->e_name == NULL)
 542                 (*ndo->ndo_error)(ndo, "etheraddr_string: strdup(buf)");
 543         return (tp->e_name);
 544 }
 545
 546 const char *
 547 le64addr_string(netdissect_options *ndo, const u_char *ep)
 548 {
 549         const unsigned int len = 8;
 550         register u_int i;
 551         register char *cp;
 552         register struct enamemem *tp;
 553         char buf[BUFSIZE];
 554
 555         tp = lookup_bytestring(ndo, ep, len);
 556         if (tp->e_name)
 557                 return (tp->e_name);
 558
 559         cp = buf;
 560         for (i = len; i > 0 ; --i) {
 561                 *cp++ = hex[*(ep + i - 1) >> 4];
 562                 *cp++ = hex[*(ep + i - 1) & 0xf];
 563                 *cp++ = ':';
 564         }
 565         cp --;
 566
 567         *cp = '\0';
 568
 569         tp->e_name = strdup(buf);
 570         if (tp->e_name == NULL)
 571                 (*ndo->ndo_error)(ndo, "le64addr_string: strdup(buf)");
 572
 573         return (tp->e_name);
 574 }
 575
 576 const char *
 577 linkaddr_string(netdissect_options *ndo, const u_char *ep,
 578                 const unsigned int type, const unsigned int len)
 579 {
 580         register u_int i;
 581         register char *cp;
 582         register struct enamemem *tp;
 583
 584         if (len == 0)
 585                 return ("<empty>");
 586
 587         if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN)
 588                 return (etheraddr_string(ndo, ep));
 589
 590         if (type == LINKADDR_FRELAY)
 591                 return (q922_string(ndo, ep, len));
 592
 593         tp = lookup_bytestring(ndo, ep, len);
 594         if (tp->e_name)
 595                 return (tp->e_name);
 596
 597         tp->e_name = cp = (char *)malloc(len*3);
 598         if (tp->e_name == NULL)
 599                 (*ndo->ndo_error)(ndo, "linkaddr_string: malloc");
 600         *cp++ = hex[*ep >> 4];
 601         *cp++ = hex[*ep++ & 0xf];
 602         for (i = len-1; i > 0 ; --i) {
 603                 *cp++ = ':';
 604                 *cp++ = hex[*ep >> 4];
 605                 *cp++ = hex[*ep++ & 0xf];
 606         }
 607         *cp = '\0';
 608         return (tp->e_name);
 609 }
 610
 611 const char *
 612 etherproto_string(netdissect_options *ndo, u_short port)
 613 {
 614         register char *cp;
 615         register struct hnamemem *tp;
 616         register uint32_t i = port;
 617         char buf[sizeof("0000")];
 618
 619         for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 620                 if (tp->addr == i)
 621                         return (tp->name);
 622
 623         tp->addr = i;
 624         tp->nxt = newhnamemem(ndo);
 625
 626         cp = buf;
 627         NTOHS(port);
 628         *cp++ = hex[port >> 12 & 0xf];
 629         *cp++ = hex[port >> 8 & 0xf];
 630         *cp++ = hex[port >> 4 & 0xf];
 631         *cp++ = hex[port & 0xf];
 632         *cp++ = '\0';
 633         tp->name = strdup(buf);
 634         if (tp->name == NULL)
 635                 (*ndo->ndo_error)(ndo, "etherproto_string: strdup(buf)");
 636         return (tp->name);
 637 }
 638
 639 const char *
 640 protoid_string(netdissect_options *ndo, register const u_char *pi)
 641 {
 642         register u_int i, j;
 643         register char *cp;
 644         register struct protoidmem *tp;
 645         char buf[sizeof("00:00:00:00:00")];
 646
 647         tp = lookup_protoid(ndo, pi);
 648         if (tp->p_name)
 649                 return tp->p_name;
 650
 651         cp = buf;
 652         if ((j = *pi >> 4) != 0)
 653                 *cp++ = hex[j];
 654         *cp++ = hex[*pi++ & 0xf];
 655         for (i = 4; (int)--i >= 0;) {
 656                 *cp++ = ':';
 657                 if ((j = *pi >> 4) != 0)
 658                         *cp++ = hex[j];
 659                 *cp++ = hex[*pi++ & 0xf];
 660         }
 661         *cp = '\0';
 662         tp->p_name = strdup(buf);
 663         if (tp->p_name == NULL)
 664                 (*ndo->ndo_error)(ndo, "protoid_string: strdup(buf)");
 665         return (tp->p_name);
 666 }
 667
 668 #define ISONSAP_MAX_LENGTH 20
 669 const char *
 670 isonsap_string(netdissect_options *ndo, const u_char *nsap,
 671                register u_int nsap_length)
 672 {
 673         register u_int nsap_idx;
 674         register char *cp;
 675         register struct enamemem *tp;
 676
 677         if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH)
 678                 return ("isonsap_string: illegal length");
 679
 680         tp = lookup_nsap(ndo, nsap, nsap_length);
 681         if (tp->e_name)
 682                 return tp->e_name;
 683
 684         tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx"));
 685         if (cp == NULL)
 686                 (*ndo->ndo_error)(ndo, "isonsap_string: malloc");
 687
 688         for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
 689                 *cp++ = hex[*nsap >> 4];
 690                 *cp++ = hex[*nsap++ & 0xf];
 691                 if (((nsap_idx & 1) == 0) &&
 692                      (nsap_idx + 1 < nsap_length)) {
 693                         *cp++ = '.';
 694                 }
 695         }
 696         *cp = '\0';
 697         return (tp->e_name);
 698 }
 699
 700 const char *
 701 tcpport_string(netdissect_options *ndo, u_short port)
 702 {
 703         register struct hnamemem *tp;
 704         register uint32_t i = port;
 705         char buf[sizeof("00000")];
 706
 707         for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 708                 if (tp->addr == i)
 709                         return (tp->name);
 710
 711         tp->addr = i;
 712         tp->nxt = newhnamemem(ndo);
 713
 714         (void)snprintf(buf, sizeof(buf), "%u", i);
 715         tp->name = strdup(buf);
 716         if (tp->name == NULL)
 717                 (*ndo->ndo_error)(ndo, "tcpport_string: strdup(buf)");
 718         return (tp->name);
 719 }
 720
 721 const char *
 722 udpport_string(netdissect_options *ndo, register u_short port)
 723 {
 724         register struct hnamemem *tp;
 725         register uint32_t i = port;
 726         char buf[sizeof("00000")];
 727
 728         for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 729                 if (tp->addr == i)
 730                         return (tp->name);
 731
 732         tp->addr = i;
 733         tp->nxt = newhnamemem(ndo);
 734
 735         (void)snprintf(buf, sizeof(buf), "%u", i);
 736         tp->name = strdup(buf);
 737         if (tp->name == NULL)
 738                 (*ndo->ndo_error)(ndo, "udpport_string: strdup(buf)");
 739         return (tp->name);
 740 }
 741
 742 const char *
 743 ipxsap_string(netdissect_options *ndo, u_short port)
 744 {
 745         register char *cp;
 746         register struct hnamemem *tp;
 747         register uint32_t i = port;
 748         char buf[sizeof("0000")];
 749
 750         for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 751                 if (tp->addr == i)
 752                         return (tp->name);
 753
 754         tp->addr = i;
 755         tp->nxt = newhnamemem(ndo);
 756
 757         cp = buf;
 758         NTOHS(port);
 759         *cp++ = hex[port >> 12 & 0xf];
 760         *cp++ = hex[port >> 8 & 0xf];
 761         *cp++ = hex[port >> 4 & 0xf];
 762         *cp++ = hex[port & 0xf];
 763         *cp++ = '\0';
 764         tp->name = strdup(buf);
 765         if (tp->name == NULL)
 766                 (*ndo->ndo_error)(ndo, "ipxsap_string: strdup(buf)");
 767         return (tp->name);
 768 }
 769
 770 static void
 771 init_servarray(netdissect_options *ndo)
 772 {
 773         struct servent *sv;
 774         register struct hnamemem *table;
 775         register int i;
 776         char buf[sizeof("0000000000")];
 777
 778         while ((sv = getservent()) != NULL) {
 779                 int port = ntohs(sv->s_port);
 780                 i = port & (HASHNAMESIZE-1);
 781                 if (strcmp(sv->s_proto, "tcp") == 0)
 782                         table = &tporttable[i];
 783                 else if (strcmp(sv->s_proto, "udp") == 0)
 784                         table = &uporttable[i];
 785                 else
 786                         continue;
 787
 788                 while (table->name)
 789                         table = table->nxt;
 790                 if (ndo->ndo_nflag) {
 791                         (void)snprintf(buf, sizeof(buf), "%d", port);
 792                         table->name = strdup(buf);
 793                 } else
 794                         table->name = strdup(sv->s_name);
 795                 if (table->name == NULL)
 796                         (*ndo->ndo_error)(ndo, "init_servarray: strdup");
 797
 798                 table->addr = port;
 799                 table->nxt = newhnamemem(ndo);
 800         }
 801         endservent();
 802 }
 803
 804 static const struct eproto {
 805         const char *s;
 806         u_short p;
 807 } eproto_db[] = {
 808         { "pup", ETHERTYPE_PUP },
 809         { "xns", ETHERTYPE_NS },
 810         { "ip", ETHERTYPE_IP },
 811         { "ip6", ETHERTYPE_IPV6 },
 812         { "arp", ETHERTYPE_ARP },
 813         { "rarp", ETHERTYPE_REVARP },
 814         { "sprite", ETHERTYPE_SPRITE },
 815         { "mopdl", ETHERTYPE_MOPDL },
 816         { "moprc", ETHERTYPE_MOPRC },
 817         { "decnet", ETHERTYPE_DN },
 818         { "lat", ETHERTYPE_LAT },
 819         { "sca", ETHERTYPE_SCA },
 820         { "lanbridge", ETHERTYPE_LANBRIDGE },
 821         { "vexp", ETHERTYPE_VEXP },
 822         { "vprod", ETHERTYPE_VPROD },
 823         { "atalk", ETHERTYPE_ATALK },
 824         { "atalkarp", ETHERTYPE_AARP },
 825         { "loopback", ETHERTYPE_LOOPBACK },
 826         { "decdts", ETHERTYPE_DECDTS },
 827         { "decdns", ETHERTYPE_DECDNS },
 828         { (char *)0, 0 }
 829 };
 830
 831 static void
 832 init_eprotoarray(netdissect_options *ndo)
 833 {
 834         register int i;
 835         register struct hnamemem *table;
 836
 837         for (i = 0; eproto_db[i].s; i++) {
 838                 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
 839                 table = &eprototable[j];
 840                 while (table->name)
 841                         table = table->nxt;
 842                 table->name = eproto_db[i].s;
 843                 table->addr = htons(eproto_db[i].p);
 844                 table->nxt = newhnamemem(ndo);
 845         }
 846 }
 847
 848 static const struct protoidlist {
 849         const u_char protoid[5];
 850         const char *name;
 851 } protoidlist[] = {
 852         {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
 853         {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
 854         {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
 855         {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
 856         {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
 857         {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
 858 };
 859
 860 /*
 861  * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
 862  * types.
 863  */
 864 static void
 865 init_protoidarray(netdissect_options *ndo)
 866 {
 867         register int i;
 868         register struct protoidmem *tp;
 869         const struct protoidlist *pl;
 870         u_char protoid[5];
 871
 872         protoid[0] = 0;
 873         protoid[1] = 0;
 874         protoid[2] = 0;
 875         for (i = 0; eproto_db[i].s; i++) {
 876                 u_short etype = htons(eproto_db[i].p);
 877
 878                 memcpy((char *)&protoid[3], (char *)&etype, 2);
 879                 tp = lookup_protoid(ndo, protoid);
 880                 tp->p_name = strdup(eproto_db[i].s);
 881                 if (tp->p_name == NULL)
 882                         (*ndo->ndo_error)(ndo,
 883                                           "init_protoidarray: strdup(eproto_db[i].s)");
 884         }
 885         /* Hardwire some SNAP proto ID names */
 886         for (pl = protoidlist; pl->name != NULL; ++pl) {
 887                 tp = lookup_protoid(ndo, pl->protoid);
 888                 /* Don't override existing name */
 889                 if (tp->p_name != NULL)
 890                         continue;
 891
 892                 tp->p_name = pl->name;
 893         }
 894 }
 895
 896 static const struct etherlist {
 897         const u_char addr[6];
 898         const char *name;
 899 } etherlist[] = {
 900         {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
 901         {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
 902 };
 903
 904 /*
 905  * Initialize the ethers hash table.  We take two different approaches
 906  * depending on whether or not the system provides the ethers name
 907  * service.  If it does, we just wire in a few names at startup,
 908  * and etheraddr_string() fills in the table on demand.  If it doesn't,
 909  * then we suck in the entire /etc/ethers file at startup.  The idea
 910  * is that parsing the local file will be fast, but spinning through
 911  * all the ethers entries via NIS & next_etherent might be very slow.
 912  *
 913  * XXX pcap_next_etherent doesn't belong in the pcap interface, but
 914  * since the pcap module already does name-to-address translation,
 915  * it's already does most of the work for the ethernet address-to-name
 916  * translation, so we just pcap_next_etherent as a convenience.
 917  */
 918 static void
 919 init_etherarray(netdissect_options *ndo)
 920 {
 921         register const struct etherlist *el;
 922         register struct enamemem *tp;
 923 #ifdef USE_ETHER_NTOHOST
 924         char name[256];
 925 #else
 926         register struct pcap_etherent *ep;
 927         register FILE *fp;
 928
 929         /* Suck in entire ethers file */
 930         fp = fopen(PCAP_ETHERS_FILE, "r");
 931         if (fp != NULL) {
 932                 while ((ep = pcap_next_etherent(fp)) != NULL) {
 933                         tp = lookup_emem(ndo, ep->addr);
 934                         tp->e_name = strdup(ep->name);
 935                         if (tp->e_name == NULL)
 936                                 (*ndo->ndo_error)(ndo,
 937                                                   "init_etherarray: strdup(ep->addr)");
 938                 }
 939                 (void)fclose(fp);
 940         }
 941 #endif
 942
 943         /* Hardwire some ethernet names */
 944         for (el = etherlist; el->name != NULL; ++el) {
 945                 tp = lookup_emem(ndo, el->addr);
 946                 /* Don't override existing name */
 947                 if (tp->e_name != NULL)
 948                         continue;
 949
 950 #ifdef USE_ETHER_NTOHOST
 951                 /*
 952                  * Use YP/NIS version of name if available.
 953                  */
 954                 if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) {
 955                         tp->e_name = strdup(name);
 956                         if (tp->e_name == NULL)
 957                                 (*ndo->ndo_error)(ndo,
 958                                                   "init_etherarray: strdup(name)");
 959                         continue;
 960                 }
 961 #endif
 962                 tp->e_name = el->name;
 963         }
 964 }
 965
 966 static const struct tok ipxsap_db[] = {
 967         { 0x0000, "Unknown" },
 968         { 0x0001, "User" },
 969         { 0x0002, "User Group" },
 970         { 0x0003, "PrintQueue" },
 971         { 0x0004, "FileServer" },
 972         { 0x0005, "JobServer" },
 973         { 0x0006, "Gateway" },
 974         { 0x0007, "PrintServer" },
 975         { 0x0008, "ArchiveQueue" },
 976         { 0x0009, "ArchiveServer" },
 977         { 0x000a, "JobQueue" },
 978         { 0x000b, "Administration" },
 979         { 0x000F, "Novell TI-RPC" },
 980         { 0x0017, "Diagnostics" },
 981         { 0x0020, "NetBIOS" },
 982         { 0x0021, "NAS SNA Gateway" },
 983         { 0x0023, "NACS AsyncGateway" },
 984         { 0x0024, "RemoteBridge/RoutingService" },
 985         { 0x0026, "BridgeServer" },
 986         { 0x0027, "TCP/IP Gateway" },
 987         { 0x0028, "Point-to-point X.25 BridgeServer" },
 988         { 0x0029, "3270 Gateway" },
 989         { 0x002a, "CHI Corp" },
 990         { 0x002c, "PC Chalkboard" },
 991         { 0x002d, "TimeSynchServer" },
 992         { 0x002e, "ARCserve5.0/PalindromeBackup" },
 993         { 0x0045, "DI3270 Gateway" },
 994         { 0x0047, "AdvertisingPrintServer" },
 995         { 0x004a, "NetBlazerModems" },
 996         { 0x004b, "BtrieveVAP" },
 997         { 0x004c, "NetwareSQL" },
 998         { 0x004d, "XtreeNetwork" },
 999         { 0x0050, "BtrieveVAP4.11" },
1000         { 0x0052, "QuickLink" },
1001         { 0x0053, "PrintQueueUser" },
1002         { 0x0058, "Multipoint X.25 Router" },
1003         { 0x0060, "STLB/NLM" },
1004         { 0x0064, "ARCserve" },
1005         { 0x0066, "ARCserve3.0" },
1006         { 0x0072, "WAN CopyUtility" },
1007         { 0x007a, "TES-NetwareVMS" },
1008         { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
1009         { 0x0095, "DDA OBGYN" },
1010         { 0x0098, "NetwareAccessServer" },
1011         { 0x009a, "Netware for VMS II/NamedPipeServer" },
1012         { 0x009b, "NetwareAccessServer" },
1013         { 0x009e, "PortableNetwareServer/SunLinkNVT" },
1014         { 0x00a1, "PowerchuteAPC UPS" },
1015         { 0x00aa, "LAWserve" },
1016         { 0x00ac, "CompaqIDA StatusMonitor" },
1017         { 0x0100, "PIPE STAIL" },
1018         { 0x0102, "LAN ProtectBindery" },
1019         { 0x0103, "OracleDataBaseServer" },
1020         { 0x0107, "Netware386/RSPX RemoteConsole" },
1021         { 0x010f, "NovellSNA Gateway" },
1022         { 0x0111, "TestServer" },
1023         { 0x0112, "HP PrintServer" },
1024         { 0x0114, "CSA MUX" },
1025         { 0x0115, "CSA LCA" },
1026         { 0x0116, "CSA CM" },
1027         { 0x0117, "CSA SMA" },
1028         { 0x0118, "CSA DBA" },
1029         { 0x0119, "CSA NMA" },
1030         { 0x011a, "CSA SSA" },
1031         { 0x011b, "CSA STATUS" },
1032         { 0x011e, "CSA APPC" },
1033         { 0x0126, "SNA TEST SSA Profile" },
1034         { 0x012a, "CSA TRACE" },
1035         { 0x012b, "NetwareSAA" },
1036         { 0x012e, "IKARUS VirusScan" },
1037         { 0x0130, "CommunicationsExecutive" },
1038         { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
1039         { 0x0135, "NetwareNamingServicesProfile" },
1040         { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
1041         { 0x0141, "LAN SpoolServer" },
1042         { 0x0152, "IRMALAN Gateway" },
1043         { 0x0154, "NamedPipeServer" },
1044         { 0x0166, "NetWareManagement" },
1045         { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
1046         { 0x0173, "Compaq" },
1047         { 0x0174, "Compaq SNMP Agent" },
1048         { 0x0175, "Compaq" },
1049         { 0x0180, "XTreeServer/XTreeTools" },
1050         { 0x018A, "NASI ServicesBroadcastServer" },
1051         { 0x01b0, "GARP Gateway" },
1052         { 0x01b1, "Binfview" },
1053         { 0x01bf, "IntelLanDeskManager" },
1054         { 0x01ca, "AXTEC" },
1055         { 0x01cb, "ShivaNetModem/E" },
1056         { 0x01cc, "ShivaLanRover/E" },
1057         { 0x01cd, "ShivaLanRover/T" },
1058         { 0x01ce, "ShivaUniversal" },
1059         { 0x01d8, "CastelleFAXPressServer" },
1060         { 0x01da, "CastelleLANPressPrintServer" },
1061         { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
1062         { 0x01f0, "LEGATO" },
1063         { 0x01f5, "LEGATO" },
1064         { 0x0233, "NMS Agent/NetwareManagementAgent" },
1065         { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
1066         { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
1067         { 0x023a, "LANtern" },
1068         { 0x023c, "MAVERICK" },
1069         { 0x023f, "NovellSMDR" },
1070         { 0x024e, "NetwareConnect" },
1071         { 0x024f, "NASI ServerBroadcast Cisco" },
1072         { 0x026a, "NMS ServiceConsole" },
1073         { 0x026b, "TimeSynchronizationServer Netware 4.x" },
1074         { 0x0278, "DirectoryServer Netware 4.x" },
1075         { 0x027b, "NetwareManagementAgent" },
1076         { 0x0280, "Novell File and Printer Sharing Service for PC" },
1077         { 0x0304, "NovellSAA Gateway" },
1078         { 0x0308, "COM/VERMED" },
1079         { 0x030a, "GalacticommWorldgroupServer" },
1080         { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
1081         { 0x0320, "AttachmateGateway" },
1082         { 0x0327, "MicrosoftDiagnostiocs" },
1083         { 0x0328, "WATCOM SQL Server" },
1084         { 0x0335, "MultiTechSystems MultisynchCommServer" },
1085         { 0x0343, "Xylogics RemoteAccessServer/LANModem" },
1086         { 0x0355, "ArcadaBackupExec" },
1087         { 0x0358, "MSLCD1" },
1088         { 0x0361, "NETINELO" },
1089         { 0x037e, "Powerchute UPS Monitoring" },
1090         { 0x037f, "ViruSafeNotify" },
1091         { 0x0386, "HP Bridge" },
1092         { 0x0387, "HP Hub" },
1093         { 0x0394, "NetWare SAA Gateway" },
1094         { 0x039b, "LotusNotes" },
1095         { 0x03b7, "CertusAntiVirus" },
1096         { 0x03c4, "ARCserve4.0" },
1097         { 0x03c7, "LANspool3.5" },
1098         { 0x03d7, "LexmarkPrinterServer" },
1099         { 0x03d8, "LexmarkXLE PrinterServer" },
1100         { 0x03dd, "BanyanENS NetwareClient" },
1101         { 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
1102         { 0x03e1, "UnivelUnixware" },
1103         { 0x03e4, "UnivelUnixware" },
1104         { 0x03fc, "IntelNetport" },
1105         { 0x03fd, "PrintServerQueue" },
1106         { 0x040A, "ipnServer" },
1107         { 0x040D, "LVERRMAN" },
1108         { 0x040E, "LVLIC" },
1109         { 0x0414, "NET Silicon (DPI)/Kyocera" },
1110         { 0x0429, "SiteLockVirus" },
1111         { 0x0432, "UFHELPR???" },
1112         { 0x0433, "Synoptics281xAdvancedSNMPAgent" },
1113         { 0x0444, "MicrosoftNT SNA Server" },
1114         { 0x0448, "Oracle" },
1115         { 0x044c, "ARCserve5.01" },
1116         { 0x0457, "CanonGP55" },
1117         { 0x045a, "QMS Printers" },
1118         { 0x045b, "DellSCSI Array" },
1119         { 0x0491, "NetBlazerModems" },
1120         { 0x04ac, "OnTimeScheduler" },
1121         { 0x04b0, "CD-Net" },
1122         { 0x0513, "EmulexNQA" },
1123         { 0x0520, "SiteLockChecks" },
1124         { 0x0529, "SiteLockChecks" },
1125         { 0x052d, "CitrixOS2 AppServer" },
1126         { 0x0535, "Tektronix" },
1127         { 0x0536, "Milan" },
1128         { 0x055d, "Attachmate SNA gateway" },
1129         { 0x056b, "IBM8235 ModemServer" },
1130         { 0x056c, "ShivaLanRover/E PLUS" },
1131         { 0x056d, "ShivaLanRover/T PLUS" },
1132         { 0x0580, "McAfeeNetShield" },
1133         { 0x05B8, "NLM to workstation communication (Revelation Software)" },
1134         { 0x05BA, "CompatibleSystemsRouters" },
1135         { 0x05BE, "CheyenneHierarchicalStorageManager" },
1136         { 0x0606, "JCWatermarkImaging" },
1137         { 0x060c, "AXISNetworkPrinter" },
1138         { 0x0610, "AdaptecSCSIManagement" },
1139         { 0x0621, "IBM AntiVirus" },
1140         { 0x0640, "Windows95 RemoteRegistryService" },
1141         { 0x064e, "MicrosoftIIS" },
1142         { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1143         { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1144         { 0x076C, "Xerox" },
1145         { 0x079b, "ShivaLanRover/E 115" },
1146         { 0x079c, "ShivaLanRover/T 115" },
1147         { 0x07B4, "CubixWorldDesk" },
1148         { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
1149         { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
1150         { 0x0810, "ELAN License Server Demo" },
1151         { 0x0824, "ShivaLanRoverAccessSwitch/E" },
1152         { 0x086a, "ISSC Collector" },
1153         { 0x087f, "ISSC DAS AgentAIX" },
1154         { 0x0880, "Intel Netport PRO" },
1155         { 0x0881, "Intel Netport PRO" },
1156         { 0x0b29, "SiteLock" },
1157         { 0x0c29, "SiteLockApplications" },
1158         { 0x0c2c, "LicensingServer" },
1159         { 0x2101, "PerformanceTechnologyInstantInternet" },
1160         { 0x2380, "LAI SiteLock" },
1161         { 0x238c, "MeetingMaker" },
1162         { 0x4808, "SiteLockServer/SiteLockMetering" },
1163         { 0x5555, "SiteLockUser" },
1164         { 0x6312, "Tapeware" },
1165         { 0x6f00, "RabbitGateway" },
1166         { 0x7703, "MODEM" },
1167         { 0x8002, "NetPortPrinters" },
1168         { 0x8008, "WordPerfectNetworkVersion" },
1169         { 0x85BE, "Cisco EIGRP" },
1170         { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
1171         { 0x9000, "McAfeeNetShield" },
1172         { 0x9604, "CSA-NT_MON" },
1173         { 0xb6a8, "OceanIsleReachoutRemoteControl" },
1174         { 0xf11f, "SiteLockMetering" },
1175         { 0xf1ff, "SiteLock" },
1176         { 0xf503, "Microsoft SQL Server" },
1177         { 0xF905, "IBM TimeAndPlace" },
1178         { 0xfbfb, "TopCallIII FaxServer" },
1179         { 0xffff, "AnyService/Wildcard" },
1180         { 0, (char *)0 }
1181 };
1182
1183 static void
1184 init_ipxsaparray(netdissect_options *ndo)
1185 {
1186         register int i;
1187         register struct hnamemem *table;
1188
1189         for (i = 0; ipxsap_db[i].s != NULL; i++) {
1190                 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
1191                 table = &ipxsaptable[j];
1192                 while (table->name)
1193                         table = table->nxt;
1194                 table->name = ipxsap_db[i].s;
1195                 table->addr = htons(ipxsap_db[i].v);
1196                 table->nxt = newhnamemem(ndo);
1197         }
1198 }
1199
1200 /*
1201  * Initialize the address to name translation machinery.  We map all
1202  * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true
1203  * (i.e., to prevent blocking on the nameserver).  localnet is the IP address
1204  * of the local network.  mask is its subnet mask.
1205  */
1206 void
1207 init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask)
1208 {
1209         if (ndo->ndo_fflag) {
1210                 f_localnet = localnet;
1211                 f_netmask = mask;
1212         }
1213         if (ndo->ndo_nflag)
1214                 /*
1215                  * Simplest way to suppress names.
1216                  */
1217                 return;
1218
1219         init_etherarray(ndo);
1220         init_servarray(ndo);
1221         init_eprotoarray(ndo);
1222         init_protoidarray(ndo);
1223         init_ipxsaparray(ndo);
1224 }
1225
1226 const char *
1227 dnaddr_string(netdissect_options *ndo, u_short dnaddr)
1228 {
1229         register struct hnamemem *tp;
1230
1231         for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL;
1232              tp = tp->nxt)
1233                 if (tp->addr == dnaddr)
1234                         return (tp->name);
1235
1236         tp->addr = dnaddr;
1237         tp->nxt = newhnamemem(ndo);
1238         if (ndo->ndo_nflag)
1239                 tp->name = dnnum_string(ndo, dnaddr);
1240         else
1241                 tp->name = dnname_string(ndo, dnaddr);
1242
1243         return(tp->name);
1244 }
1245
1246 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
1247 struct hnamemem *
1248 newhnamemem(netdissect_options *ndo)
1249 {
1250         register struct hnamemem *p;
1251         static struct hnamemem *ptr = NULL;
1252         static u_int num = 0;
1253
1254         if (num  <= 0) {
1255                 num = 64;
1256                 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
1257                 if (ptr == NULL)
1258                         (*ndo->ndo_error)(ndo, "newhnamemem: calloc");
1259         }
1260         --num;
1261         p = ptr++;
1262         return (p);
1263 }
1264
1265 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
1266 struct h6namemem *
1267 newh6namemem(netdissect_options *ndo)
1268 {
1269         register struct h6namemem *p;
1270         static struct h6namemem *ptr = NULL;
1271         static u_int num = 0;
1272
1273         if (num  <= 0) {
1274                 num = 64;
1275                 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
1276                 if (ptr == NULL)
1277                         (*ndo->ndo_error)(ndo, "newh6namemem: calloc");
1278         }
1279         --num;
1280         p = ptr++;
1281         return (p);
1282 }
1283
1284 /* Represent TCI part of the 802.1Q 4-octet tag as text. */
1285 const char *
1286 ieee8021q_tci_string(const uint16_t tci)
1287 {
1288         static char buf[128];
1289         snprintf(buf, sizeof(buf), "vlan %u, p %u%s",
1290                  tci & 0xfff,
1291                  tci >> 13,
1292                  (tci & 0x1000) ? ", DEI" : "");
1293         return buf;
1294 }