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 #ifndef lint
  25 static const char rcsid[] _U_ =
  26     "@(#) $Header: /tcpdump/master/tcpdump/addrtoname.c,v 1.96.2.3 2003-12-15 04:02:53 guy Exp $ (LBL)";
  27 #endif
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include <tcpdump-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 HAVE_NETINET_ETHER_H
  43 #include <netinet/ether.h>  /* ether_ntohost on linux */
  44 #endif /* HAVE_NETINET_ETHER_H */
  45 #endif /* USE_ETHER_NTOHOST */
  46
  47 #include <pcap.h>
  48 #include <pcap-namedb.h>
  49 #include <signal.h>
  50 #include <stdio.h>
  51 #include <string.h>
  52 #include <stdlib.h>
  53
  54 #include "interface.h"
  55 #include "addrtoname.h"
  56 #include "llc.h"
  57 #include "setsignal.h"
  58
  59 /*
  60  * hash tables for whatever-to-name translations
  61  *
  62  * XXX there has to be error checks against strdup(3) failure
  63  */
  64
  65 #define HASHNAMESIZE 4096
  66
  67 struct hnamemem {
  68         u_int32_t addr;
  69         const char *name;
  70         struct hnamemem *nxt;
  71 };
  72
  73 struct hnamemem hnametable[HASHNAMESIZE];
  74 struct hnamemem tporttable[HASHNAMESIZE];
  75 struct hnamemem uporttable[HASHNAMESIZE];
  76 struct hnamemem eprototable[HASHNAMESIZE];
  77 struct hnamemem dnaddrtable[HASHNAMESIZE];
  78 struct hnamemem llcsaptable[HASHNAMESIZE];
  79 struct hnamemem ipxsaptable[HASHNAMESIZE];
  80
  81 #if defined(INET6) && defined(WIN32)
  82 /*
  83  * fake gethostbyaddr for Win2k/XP
  84  * gethostbyaddr() returns incorrect value when AF_INET6 is passed
  85  * to 3rd argument.
  86  *
  87  * h_name in struct hostent is only valid.
  88  */
  89 static struct hostent *
  90 win32_gethostbyaddr(const char *addr, int len, int type)
  91 {
  92         static struct hostent host;
  93         static char hostbuf[NI_MAXHOST];
  94         char hname[NI_MAXHOST];
  95         struct sockaddr_in6 addr6;
  96
  97         host.h_name = hostbuf;
  98         switch (type) {
  99         case AF_INET:
 100                 return gethostbyaddr(addr, len, type);
 101                 break;
 102         case AF_INET6:
 103                 memset(&addr6, 0, sizeof(addr6));
 104                 addr6.sin6_family = AF_INET6;
 105                 memcpy(&addr6.sin6_addr, addr, len);
 106                 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
 107                         hname, sizeof(hname), NULL, 0, 0)) {
 108                     return NULL;
 109                 } else {
 110                         strcpy(host.h_name, hname);
 111                         return &host;
 112                 }
 113                 break;
 114         default:
 115                 return NULL;
 116         }
 117 }
 118 #define gethostbyaddr win32_gethostbyaddr
 119 #endif /* INET6 & WIN32*/
 120
 121 #ifdef INET6
 122 struct h6namemem {
 123         struct in6_addr addr;
 124         char *name;
 125         struct h6namemem *nxt;
 126 };
 127
 128 struct h6namemem h6nametable[HASHNAMESIZE];
 129 #endif /* INET6 */
 130
 131 struct enamemem {
 132         u_short e_addr0;
 133         u_short e_addr1;
 134         u_short e_addr2;
 135         const char *e_name;
 136         u_char *e_nsap;                 /* used only for nsaptable[] */
 137 #define e_bs e_nsap                     /* for bytestringtable */
 138         struct enamemem *e_nxt;
 139 };
 140
 141 struct enamemem enametable[HASHNAMESIZE];
 142 struct enamemem nsaptable[HASHNAMESIZE];
 143 struct enamemem bytestringtable[HASHNAMESIZE];
 144
 145 struct protoidmem {
 146         u_int32_t p_oui;
 147         u_short p_proto;
 148         const char *p_name;
 149         struct protoidmem *p_nxt;
 150 };
 151
 152 struct protoidmem protoidtable[HASHNAMESIZE];
 153
 154 /*
 155  * A faster replacement for inet_ntoa().
 156  */
 157 const char *
 158 intoa(u_int32_t addr)
 159 {
 160         register char *cp;
 161         register u_int byte;
 162         register int n;
 163         static char buf[sizeof(".xxx.xxx.xxx.xxx")];
 164
 165         NTOHL(addr);
 166         cp = &buf[sizeof buf];
 167         *--cp = '\0';
 168
 169         n = 4;
 170         do {
 171                 byte = addr & 0xff;
 172                 *--cp = byte % 10 + '0';
 173                 byte /= 10;
 174                 if (byte > 0) {
 175                         *--cp = byte % 10 + '0';
 176                         byte /= 10;
 177                         if (byte > 0)
 178                                 *--cp = byte + '0';
 179                 }
 180                 *--cp = '.';
 181                 addr >>= 8;
 182         } while (--n > 0);
 183
 184         return cp + 1;
 185 }
 186
 187 static u_int32_t f_netmask;
 188 static u_int32_t f_localnet;
 189
 190 /*
 191  * Return a name for the IP address pointed to by ap.  This address
 192  * is assumed to be in network byte order.
 193  */
 194 const char *
 195 getname(const u_char *ap)
 196 {
 197         register struct hostent *hp;
 198         u_int32_t addr;
 199         static struct hnamemem *p;              /* static for longjmp() */
 200
 201         memcpy(&addr, ap, sizeof(addr));
 202         p = &hnametable[addr & (HASHNAMESIZE-1)];
 203         for (; p->nxt; p = p->nxt) {
 204                 if (p->addr == addr)
 205                         return (p->name);
 206         }
 207         p->addr = addr;
 208         p->nxt = newhnamemem();
 209
 210         /*
 211          * Print names unless:
 212          *      (1) -n was given.
 213          *      (2) Address is foreign and -f was given. (If -f was not
 214          *          given, f_netmask and f_localnet are 0 and the test
 215          *          evaluates to true)
 216          */
 217         if (!nflag &&
 218             (addr & f_netmask) == f_localnet) {
 219                 hp = gethostbyaddr((char *)&addr, 4, AF_INET);
 220                 if (hp) {
 221                         char *dotp;
 222
 223                         p->name = strdup(hp->h_name);
 224                         if (Nflag) {
 225                                 /* Remove domain qualifications */
 226                                 dotp = strchr(p->name, '.');
 227                                 if (dotp)
 228                                         *dotp = '\0';
 229                         }
 230                         return (p->name);
 231                 }
 232         }
 233         p->name = strdup(intoa(addr));
 234         return (p->name);
 235 }
 236
 237 #ifdef INET6
 238 /*
 239  * Return a name for the IP6 address pointed to by ap.  This address
 240  * is assumed to be in network byte order.
 241  */
 242 const char *
 243 getname6(const u_char *ap)
 244 {
 245         register struct hostent *hp;
 246         struct in6_addr addr;
 247         static struct h6namemem *p;             /* static for longjmp() */
 248         register const char *cp;
 249         char ntop_buf[INET6_ADDRSTRLEN];
 250
 251         memcpy(&addr, ap, sizeof(addr));
 252         p = &h6nametable[*(u_int16_t *)&addr.s6_addr[14] & (HASHNAMESIZE-1)];
 253         for (; p->nxt; p = p->nxt) {
 254                 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
 255                         return (p->name);
 256         }
 257         p->addr = addr;
 258         p->nxt = newh6namemem();
 259
 260         /*
 261          * Do not print names if -n was given.
 262          */
 263         if (!nflag) {
 264                 hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6);
 265                 if (hp) {
 266                         char *dotp;
 267
 268                         p->name = strdup(hp->h_name);
 269                         if (Nflag) {
 270                                 /* Remove domain qualifications */
 271                                 dotp = strchr(p->name, '.');
 272                                 if (dotp)
 273                                         *dotp = '\0';
 274                         }
 275                         return (p->name);
 276                 }
 277         }
 278         cp = inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf));
 279         p->name = strdup(cp);
 280         return (p->name);
 281 }
 282 #endif /* INET6 */
 283
 284 static char hex[] = "0123456789abcdef";
 285
 286
 287 /* Find the hash node that corresponds the ether address 'ep' */
 288
 289 static inline struct enamemem *
 290 lookup_emem(const u_char *ep)
 291 {
 292         register u_int i, j, k;
 293         struct enamemem *tp;
 294
 295         k = (ep[0] << 8) | ep[1];
 296         j = (ep[2] << 8) | ep[3];
 297         i = (ep[4] << 8) | ep[5];
 298
 299         tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
 300         while (tp->e_nxt)
 301                 if (tp->e_addr0 == i &&
 302                     tp->e_addr1 == j &&
 303                     tp->e_addr2 == k)
 304                         return tp;
 305                 else
 306                         tp = tp->e_nxt;
 307         tp->e_addr0 = i;
 308         tp->e_addr1 = j;
 309         tp->e_addr2 = k;
 310         tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
 311         if (tp->e_nxt == NULL)
 312                 error("lookup_emem: calloc");
 313
 314         return tp;
 315 }
 316
 317 /*
 318  * Find the hash node that corresponds to the bytestring 'bs'
 319  * with length 'nlen'
 320  */
 321
 322 static inline struct enamemem *
 323 lookup_bytestring(register const u_char *bs, const unsigned int nlen)
 324 {
 325         struct enamemem *tp;
 326         register u_int i, j, k;
 327
 328         if (nlen >= 6) {
 329                 k = (bs[0] << 8) | bs[1];
 330                 j = (bs[2] << 8) | bs[3];
 331                 i = (bs[4] << 8) | bs[5];
 332         } else if (nlen >= 4) {
 333                 k = (bs[0] << 8) | bs[1];
 334                 j = (bs[2] << 8) | bs[3];
 335                 i = 0;
 336         } else
 337                 i = j = k = 0;
 338
 339         tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
 340         while (tp->e_nxt)
 341                 if (tp->e_addr0 == i &&
 342                     tp->e_addr1 == j &&
 343                     tp->e_addr2 == k &&
 344                     memcmp((const char *)bs, (const char *)(tp->e_bs), nlen) == 0)
 345                         return tp;
 346                 else
 347                         tp = tp->e_nxt;
 348
 349         tp->e_addr0 = i;
 350         tp->e_addr1 = j;
 351         tp->e_addr2 = k;
 352
 353         tp->e_bs = (u_char *) calloc(1, nlen + 1);
 354         memcpy(tp->e_bs, bs, nlen);
 355         tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
 356         if (tp->e_nxt == NULL)
 357                 error("lookup_bytestring: calloc");
 358
 359         return tp;
 360 }
 361
 362 /* Find the hash node that corresponds the NSAP 'nsap' */
 363
 364 static inline struct enamemem *
 365 lookup_nsap(register const u_char *nsap)
 366 {
 367         register u_int i, j, k;
 368         unsigned int nlen = *nsap;
 369         struct enamemem *tp;
 370         const u_char *ensap = nsap + nlen - 6;
 371
 372         if (nlen > 6) {
 373                 k = (ensap[0] << 8) | ensap[1];
 374                 j = (ensap[2] << 8) | ensap[3];
 375                 i = (ensap[4] << 8) | ensap[5];
 376         }
 377         else
 378                 i = j = k = 0;
 379
 380         tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
 381         while (tp->e_nxt)
 382                 if (tp->e_addr0 == i &&
 383                     tp->e_addr1 == j &&
 384                     tp->e_addr2 == k &&
 385                     tp->e_nsap[0] == nlen &&
 386                     memcmp((const char *)&(nsap[1]),
 387                         (char *)&(tp->e_nsap[1]), nlen) == 0)
 388                         return tp;
 389                 else
 390                         tp = tp->e_nxt;
 391         tp->e_addr0 = i;
 392         tp->e_addr1 = j;
 393         tp->e_addr2 = k;
 394         tp->e_nsap = (u_char *)malloc(nlen + 1);
 395         if (tp->e_nsap == NULL)
 396                 error("lookup_nsap: malloc");
 397         memcpy((char *)tp->e_nsap, (const char *)nsap, nlen + 1);
 398         tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
 399         if (tp->e_nxt == NULL)
 400                 error("lookup_nsap: calloc");
 401
 402         return tp;
 403 }
 404
 405 /* Find the hash node that corresponds the protoid 'pi'. */
 406
 407 static inline struct protoidmem *
 408 lookup_protoid(const u_char *pi)
 409 {
 410         register u_int i, j;
 411         struct protoidmem *tp;
 412
 413         /* 5 octets won't be aligned */
 414         i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
 415         j =   (pi[3] << 8) + pi[4];
 416         /* XXX should be endian-insensitive, but do big-endian testing  XXX */
 417
 418         tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
 419         while (tp->p_nxt)
 420                 if (tp->p_oui == i && tp->p_proto == j)
 421                         return tp;
 422                 else
 423                         tp = tp->p_nxt;
 424         tp->p_oui = i;
 425         tp->p_proto = j;
 426         tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
 427         if (tp->p_nxt == NULL)
 428                 error("lookup_protoid: calloc");
 429
 430         return tp;
 431 }
 432
 433 const char *
 434 etheraddr_string(register const u_char *ep)
 435 {
 436         register u_int i;
 437         register char *cp;
 438         register struct enamemem *tp;
 439         char buf[sizeof("00:00:00:00:00:00")];
 440
 441         tp = lookup_emem(ep);
 442         if (tp->e_name)
 443                 return (tp->e_name);
 444 #ifdef USE_ETHER_NTOHOST
 445         if (!nflag) {
 446                 char buf2[128];
 447                 if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) {
 448                         tp->e_name = strdup(buf2);
 449                         return (tp->e_name);
 450                 }
 451         }
 452 #endif
 453         cp = buf;
 454         *cp++ = hex[*ep >> 4 ];
 455         *cp++ = hex[*ep++ & 0xf];
 456         for (i = 5; (int)--i >= 0;) {
 457                 *cp++ = ':';
 458                 *cp++ = hex[*ep >> 4 ];
 459                 *cp++ = hex[*ep++ & 0xf];
 460         }
 461         *cp = '\0';
 462         tp->e_name = strdup(buf);
 463         return (tp->e_name);
 464 }
 465
 466 const char *
 467 linkaddr_string(const u_char *ep, const unsigned int len)
 468 {
 469         register u_int i, j;
 470         register char *cp;
 471         register struct enamemem *tp;
 472
 473         if (len == 6)   /* XXX not totally correct... */
 474                 return etheraddr_string(ep);
 475
 476         tp = lookup_bytestring(ep, len);
 477         if (tp->e_name)
 478                 return (tp->e_name);
 479
 480         tp->e_name = cp = (char *)malloc(len*3);
 481         if (tp->e_name == NULL)
 482                 error("linkaddr_string: malloc");
 483         if ((j = *ep >> 4) != 0)
 484                 *cp++ = hex[j];
 485         *cp++ = hex[*ep++ & 0xf];
 486         for (i = len-1; i > 0 ; --i) {
 487                 *cp++ = ':';
 488                 if ((j = *ep >> 4) != 0)
 489                         *cp++ = hex[j];
 490                 *cp++ = hex[*ep++ & 0xf];
 491         }
 492         *cp = '\0';
 493         return (tp->e_name);
 494 }
 495
 496 const char *
 497 etherproto_string(u_short port)
 498 {
 499         register char *cp;
 500         register struct hnamemem *tp;
 501         register u_int32_t i = port;
 502         char buf[sizeof("0000")];
 503
 504         for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 505                 if (tp->addr == i)
 506                         return (tp->name);
 507
 508         tp->addr = i;
 509         tp->nxt = newhnamemem();
 510
 511         cp = buf;
 512         NTOHS(port);
 513         *cp++ = hex[port >> 12 & 0xf];
 514         *cp++ = hex[port >> 8 & 0xf];
 515         *cp++ = hex[port >> 4 & 0xf];
 516         *cp++ = hex[port & 0xf];
 517         *cp++ = '\0';
 518         tp->name = strdup(buf);
 519         return (tp->name);
 520 }
 521
 522 const char *
 523 protoid_string(register const u_char *pi)
 524 {
 525         register u_int i, j;
 526         register char *cp;
 527         register struct protoidmem *tp;
 528         char buf[sizeof("00:00:00:00:00")];
 529
 530         tp = lookup_protoid(pi);
 531         if (tp->p_name)
 532                 return tp->p_name;
 533
 534         cp = buf;
 535         if ((j = *pi >> 4) != 0)
 536                 *cp++ = hex[j];
 537         *cp++ = hex[*pi++ & 0xf];
 538         for (i = 4; (int)--i >= 0;) {
 539                 *cp++ = ':';
 540                 if ((j = *pi >> 4) != 0)
 541                         *cp++ = hex[j];
 542                 *cp++ = hex[*pi++ & 0xf];
 543         }
 544         *cp = '\0';
 545         tp->p_name = strdup(buf);
 546         return (tp->p_name);
 547 }
 548
 549 const char *
 550 llcsap_string(u_char sap)
 551 {
 552         register struct hnamemem *tp;
 553         register u_int32_t i = sap;
 554         char buf[sizeof("sap 00")];
 555
 556         for (tp = &llcsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 557                 if (tp->addr == i)
 558                         return (tp->name);
 559
 560         tp->addr = i;
 561         tp->nxt = newhnamemem();
 562
 563         snprintf(buf, sizeof(buf), "sap %02x", sap & 0xff);
 564         tp->name = strdup(buf);
 565         return (tp->name);
 566 }
 567
 568 const char *
 569 isonsap_string(const u_char *nsap)
 570 {
 571         register u_int i, nlen = nsap[0];
 572         register char *cp;
 573         register struct enamemem *tp;
 574
 575         tp = lookup_nsap(nsap);
 576         if (tp->e_name)
 577                 return tp->e_name;
 578
 579         tp->e_name = cp = (char *)malloc(nlen * 2 + 2);
 580         if (cp == NULL)
 581                 error("isonsap_string: malloc");
 582
 583         nsap++;
 584         *cp++ = '/';
 585         for (i = nlen; (int)--i >= 0;) {
 586                 *cp++ = hex[*nsap >> 4];
 587                 *cp++ = hex[*nsap++ & 0xf];
 588         }
 589         *cp = '\0';
 590         return (tp->e_name);
 591 }
 592
 593 const char *
 594 tcpport_string(u_short port)
 595 {
 596         register struct hnamemem *tp;
 597         register u_int32_t i = port;
 598         char buf[sizeof("00000")];
 599
 600         for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 601                 if (tp->addr == i)
 602                         return (tp->name);
 603
 604         tp->addr = i;
 605         tp->nxt = newhnamemem();
 606
 607         (void)snprintf(buf, sizeof(buf), "%u", i);
 608         tp->name = strdup(buf);
 609         return (tp->name);
 610 }
 611
 612 const char *
 613 udpport_string(register u_short port)
 614 {
 615         register struct hnamemem *tp;
 616         register u_int32_t i = port;
 617         char buf[sizeof("00000")];
 618
 619         for (tp = &uporttable[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();
 625
 626         (void)snprintf(buf, sizeof(buf), "%u", i);
 627         tp->name = strdup(buf);
 628         return (tp->name);
 629 }
 630
 631 const char *
 632 ipxsap_string(u_short port)
 633 {
 634         register char *cp;
 635         register struct hnamemem *tp;
 636         register u_int32_t i = port;
 637         char buf[sizeof("0000")];
 638
 639         for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
 640                 if (tp->addr == i)
 641                         return (tp->name);
 642
 643         tp->addr = i;
 644         tp->nxt = newhnamemem();
 645
 646         cp = buf;
 647         NTOHS(port);
 648         *cp++ = hex[port >> 12 & 0xf];
 649         *cp++ = hex[port >> 8 & 0xf];
 650         *cp++ = hex[port >> 4 & 0xf];
 651         *cp++ = hex[port & 0xf];
 652         *cp++ = '\0';
 653         tp->name = strdup(buf);
 654         return (tp->name);
 655 }
 656
 657 static void
 658 init_servarray(void)
 659 {
 660         struct servent *sv;
 661         register struct hnamemem *table;
 662         register int i;
 663         char buf[sizeof("0000000000")];
 664
 665         while ((sv = getservent()) != NULL) {
 666                 int port = ntohs(sv->s_port);
 667                 i = port & (HASHNAMESIZE-1);
 668                 if (strcmp(sv->s_proto, "tcp") == 0)
 669                         table = &tporttable[i];
 670                 else if (strcmp(sv->s_proto, "udp") == 0)
 671                         table = &uporttable[i];
 672                 else
 673                         continue;
 674
 675                 while (table->name)
 676                         table = table->nxt;
 677                 if (nflag) {
 678                         (void)snprintf(buf, sizeof(buf), "%d", port);
 679                         table->name = strdup(buf);
 680                 } else
 681                         table->name = strdup(sv->s_name);
 682                 table->addr = port;
 683                 table->nxt = newhnamemem();
 684         }
 685         endservent();
 686 }
 687
 688 /*XXX from libbpfc.a */
 689 #ifndef WIN32
 690 extern struct eproto {
 691 #else
 692 __declspec( dllimport) struct eproto {
 693 #endif
 694         char *s;
 695         u_short p;
 696 } eproto_db[];
 697
 698 static void
 699 init_eprotoarray(void)
 700 {
 701         register int i;
 702         register struct hnamemem *table;
 703
 704         for (i = 0; eproto_db[i].s; i++) {
 705                 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
 706                 table = &eprototable[j];
 707                 while (table->name)
 708                         table = table->nxt;
 709                 table->name = eproto_db[i].s;
 710                 table->addr = htons(eproto_db[i].p);
 711                 table->nxt = newhnamemem();
 712         }
 713 }
 714
 715 static struct protoidlist {
 716         const u_char protoid[5];
 717         const char *name;
 718 } protoidlist[] = {
 719         {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
 720         {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
 721         {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
 722         {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
 723         {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
 724         {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
 725 };
 726
 727 /*
 728  * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
 729  * types.
 730  */
 731 static void
 732 init_protoidarray(void)
 733 {
 734         register int i;
 735         register struct protoidmem *tp;
 736         struct protoidlist *pl;
 737         u_char protoid[5];
 738
 739         protoid[0] = 0;
 740         protoid[1] = 0;
 741         protoid[2] = 0;
 742         for (i = 0; eproto_db[i].s; i++) {
 743                 u_short etype = htons(eproto_db[i].p);
 744
 745                 memcpy((char *)&protoid[3], (char *)&etype, 2);
 746                 tp = lookup_protoid(protoid);
 747                 tp->p_name = strdup(eproto_db[i].s);
 748         }
 749         /* Hardwire some SNAP proto ID names */
 750         for (pl = protoidlist; pl->name != NULL; ++pl) {
 751                 tp = lookup_protoid(pl->protoid);
 752                 /* Don't override existing name */
 753                 if (tp->p_name != NULL)
 754                         continue;
 755
 756                 tp->p_name = pl->name;
 757         }
 758 }
 759
 760 static struct etherlist {
 761         const u_char addr[6];
 762         const char *name;
 763 } etherlist[] = {
 764         {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
 765         {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
 766 };
 767
 768 /*
 769  * Initialize the ethers hash table.  We take two different approaches
 770  * depending on whether or not the system provides the ethers name
 771  * service.  If it does, we just wire in a few names at startup,
 772  * and etheraddr_string() fills in the table on demand.  If it doesn't,
 773  * then we suck in the entire /etc/ethers file at startup.  The idea
 774  * is that parsing the local file will be fast, but spinning through
 775  * all the ethers entries via NIS & next_etherent might be very slow.
 776  *
 777  * XXX pcap_next_etherent doesn't belong in the pcap interface, but
 778  * since the pcap module already does name-to-address translation,
 779  * it's already does most of the work for the ethernet address-to-name
 780  * translation, so we just pcap_next_etherent as a convenience.
 781  */
 782 static void
 783 init_etherarray(void)
 784 {
 785         register struct etherlist *el;
 786         register struct enamemem *tp;
 787 #ifdef USE_ETHER_NTOHOST
 788         char name[256];
 789 #else
 790         register struct pcap_etherent *ep;
 791         register FILE *fp;
 792
 793         /* Suck in entire ethers file */
 794         fp = fopen(PCAP_ETHERS_FILE, "r");
 795         if (fp != NULL) {
 796                 while ((ep = pcap_next_etherent(fp)) != NULL) {
 797                         tp = lookup_emem(ep->addr);
 798                         tp->e_name = strdup(ep->name);
 799                 }
 800                 (void)fclose(fp);
 801         }
 802 #endif
 803
 804         /* Hardwire some ethernet names */
 805         for (el = etherlist; el->name != NULL; ++el) {
 806                 tp = lookup_emem(el->addr);
 807                 /* Don't override existing name */
 808                 if (tp->e_name != NULL)
 809                         continue;
 810
 811 #ifdef USE_ETHER_NTOHOST
 812                 /* Use yp/nis version of name if available */
 813                 if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) {
 814                         tp->e_name = strdup(name);
 815                         continue;
 816                 }
 817 #endif
 818                 tp->e_name = el->name;
 819         }
 820 }
 821
 822 static struct tok llcsap_db[] = {
 823         { LLCSAP_NULL,          "null" },
 824         { LLCSAP_8021B_I,       "802.1b-gsap" },
 825         { LLCSAP_8021B_G,       "802.1b-isap" },
 826         { LLCSAP_IP,            "ip-sap" },
 827         { LLCSAP_PROWAYNM,      "proway-nm" },
 828         { LLCSAP_8021D,         "802.1d" },
 829         { LLCSAP_RS511,         "eia-rs511" },
 830         { LLCSAP_ISO8208,       "x.25/llc2" },
 831         { LLCSAP_PROWAY,        "proway" },
 832         { LLCSAP_SNAP,          "snap" },
 833         { LLCSAP_IPX,           "IPX" },
 834         { LLCSAP_NETBEUI,       "netbeui" },
 835         { LLCSAP_ISONS,         "iso-clns" },
 836         { LLCSAP_GLOBAL,        "global" },
 837         { 0,                    NULL }
 838 };
 839
 840 static void
 841 init_llcsaparray(void)
 842 {
 843         register int i;
 844         register struct hnamemem *table;
 845
 846         for (i = 0; llcsap_db[i].s != NULL; i++) {
 847                 table = &llcsaptable[llcsap_db[i].v];
 848                 while (table->name)
 849                         table = table->nxt;
 850                 table->name = llcsap_db[i].s;
 851                 table->addr = llcsap_db[i].v;
 852                 table->nxt = newhnamemem();
 853         }
 854 }
 855
 856 static struct tok ipxsap_db[] = {
 857         { 0x0000, "Unknown" },
 858         { 0x0001, "User" },
 859         { 0x0002, "User Group" },
 860         { 0x0003, "PrintQueue" },
 861         { 0x0004, "FileServer" },
 862         { 0x0005, "JobServer" },
 863         { 0x0006, "Gateway" },
 864         { 0x0007, "PrintServer" },
 865         { 0x0008, "ArchiveQueue" },
 866         { 0x0009, "ArchiveServer" },
 867         { 0x000a, "JobQueue" },
 868         { 0x000b, "Administration" },
 869         { 0x000F, "Novell TI-RPC" },
 870         { 0x0017, "Diagnostics" },
 871         { 0x0020, "NetBIOS" },
 872         { 0x0021, "NAS SNA Gateway" },
 873         { 0x0023, "NACS AsyncGateway" },
 874         { 0x0024, "RemoteBridge/RoutingService" },
 875         { 0x0026, "BridgeServer" },
 876         { 0x0027, "TCP/IP Gateway" },
 877         { 0x0028, "Point-to-point X.25 BridgeServer" },
 878         { 0x0029, "3270 Gateway" },
 879         { 0x002a, "CHI Corp" },
 880         { 0x002c, "PC Chalkboard" },
 881         { 0x002d, "TimeSynchServer" },
 882         { 0x002e, "ARCserve5.0/PalindromeBackup" },
 883         { 0x0045, "DI3270 Gateway" },
 884         { 0x0047, "AdvertisingPrintServer" },
 885         { 0x004a, "NetBlazerModems" },
 886         { 0x004b, "BtrieveVAP" },
 887         { 0x004c, "NetwareSQL" },
 888         { 0x004d, "XtreeNetwork" },
 889         { 0x0050, "BtrieveVAP4.11" },
 890         { 0x0052, "QuickLink" },
 891         { 0x0053, "PrintQueueUser" },
 892         { 0x0058, "Multipoint X.25 Router" },
 893         { 0x0060, "STLB/NLM" },
 894         { 0x0064, "ARCserve" },
 895         { 0x0066, "ARCserve3.0" },
 896         { 0x0072, "WAN CopyUtility" },
 897         { 0x007a, "TES-NetwareVMS" },
 898         { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
 899         { 0x0095, "DDA OBGYN" },
 900         { 0x0098, "NetwareAccessServer" },
 901         { 0x009a, "Netware for VMS II/NamedPipeServer" },
 902         { 0x009b, "NetwareAccessServer" },
 903         { 0x009e, "PortableNetwareServer/SunLinkNVT" },
 904         { 0x00a1, "PowerchuteAPC UPS" },
 905         { 0x00aa, "LAWserve" },
 906         { 0x00ac, "CompaqIDA StatusMonitor" },
 907         { 0x0100, "PIPE STAIL" },
 908         { 0x0102, "LAN ProtectBindery" },
 909         { 0x0103, "OracleDataBaseServer" },
 910         { 0x0107, "Netware386/RSPX RemoteConsole" },
 911         { 0x010f, "NovellSNA Gateway" },
 912         { 0x0111, "TestServer" },
 913         { 0x0112, "HP PrintServer" },
 914         { 0x0114, "CSA MUX" },
 915         { 0x0115, "CSA LCA" },
 916         { 0x0116, "CSA CM" },
 917         { 0x0117, "CSA SMA" },
 918         { 0x0118, "CSA DBA" },
 919         { 0x0119, "CSA NMA" },
 920         { 0x011a, "CSA SSA" },
 921         { 0x011b, "CSA STATUS" },
 922         { 0x011e, "CSA APPC" },
 923         { 0x0126, "SNA TEST SSA Profile" },
 924         { 0x012a, "CSA TRACE" },
 925         { 0x012b, "NetwareSAA" },
 926         { 0x012e, "IKARUS VirusScan" },
 927         { 0x0130, "CommunicationsExecutive" },
 928         { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
 929         { 0x0135, "NetwareNamingServicesProfile" },
 930         { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
 931         { 0x0141, "LAN SpoolServer" },
 932         { 0x0152, "IRMALAN Gateway" },
 933         { 0x0154, "NamedPipeServer" },
 934         { 0x0166, "NetWareManagement" },
 935         { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
 936         { 0x0173, "Compaq" },
 937         { 0x0174, "Compaq SNMP Agent" },
 938         { 0x0175, "Compaq" },
 939         { 0x0180, "XTreeServer/XTreeTools" },
 940         { 0x018A, "NASI ServicesBroadcastServer" },
 941         { 0x01b0, "GARP Gateway" },
 942         { 0x01b1, "Binfview" },
 943         { 0x01bf, "IntelLanDeskManager" },
 944         { 0x01ca, "AXTEC" },
 945         { 0x01cb, "ShivaNetModem/E" },
 946         { 0x01cc, "ShivaLanRover/E" },
 947         { 0x01cd, "ShivaLanRover/T" },
 948         { 0x01ce, "ShivaUniversal" },
 949         { 0x01d8, "CastelleFAXPressServer" },
 950         { 0x01da, "CastelleLANPressPrintServer" },
 951         { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
 952         { 0x01f0, "LEGATO" },
 953         { 0x01f5, "LEGATO" },
 954         { 0x0233, "NMS Agent/NetwareManagementAgent" },
 955         { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
 956         { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
 957         { 0x023a, "LANtern" },
 958         { 0x023c, "MAVERICK" },
 959         { 0x023f, "NovellSMDR" },
 960         { 0x024e, "NetwareConnect" },
 961         { 0x024f, "NASI ServerBroadcast Cisco" },
 962         { 0x026a, "NMS ServiceConsole" },
 963         { 0x026b, "TimeSynchronizationServer Netware 4.x" },
 964         { 0x0278, "DirectoryServer Netware 4.x" },
 965         { 0x027b, "NetwareManagementAgent" },
 966         { 0x0280, "Novell File and Printer Sharing Service for PC" },
 967         { 0x0304, "NovellSAA Gateway" },
 968         { 0x0308, "COM/VERMED" },
 969         { 0x030a, "GalacticommWorldgroupServer" },
 970         { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
 971         { 0x0320, "AttachmateGateway" },
 972         { 0x0327, "MicrosoftDiagnostiocs" },
 973         { 0x0328, "WATCOM SQL Server" },
 974         { 0x0335, "MultiTechSystems MultisynchCommServer" },
 975         { 0x0343, "Xylogics RemoteAccessServer/LANModem" },
 976         { 0x0355, "ArcadaBackupExec" },
 977         { 0x0358, "MSLCD1" },
 978         { 0x0361, "NETINELO" },
 979         { 0x037e, "Powerchute UPS Monitoring" },
 980         { 0x037f, "ViruSafeNotify" },
 981         { 0x0386, "HP Bridge" },
 982         { 0x0387, "HP Hub" },
 983         { 0x0394, "NetWare SAA Gateway" },
 984         { 0x039b, "LotusNotes" },
 985         { 0x03b7, "CertusAntiVirus" },
 986         { 0x03c4, "ARCserve4.0" },
 987         { 0x03c7, "LANspool3.5" },
 988         { 0x03d7, "LexmarkPrinterServer" },
 989         { 0x03d8, "LexmarkXLE PrinterServer" },
 990         { 0x03dd, "BanyanENS NetwareClient" },
 991         { 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
 992         { 0x03e1, "UnivelUnixware" },
 993         { 0x03e4, "UnivelUnixware" },
 994         { 0x03fc, "IntelNetport" },
 995         { 0x03fd, "PrintServerQueue" },
 996         { 0x040A, "ipnServer" },
 997         { 0x040D, "LVERRMAN" },
 998         { 0x040E, "LVLIC" },
 999         { 0x0414, "NET Silicon (DPI)/Kyocera" },
1000         { 0x0429, "SiteLockVirus" },
1001         { 0x0432, "UFHELPR???" },
1002         { 0x0433, "Synoptics281xAdvancedSNMPAgent" },
1003         { 0x0444, "MicrosoftNT SNA Server" },
1004         { 0x0448, "Oracle" },
1005         { 0x044c, "ARCserve5.01" },
1006         { 0x0457, "CanonGP55" },
1007         { 0x045a, "QMS Printers" },
1008         { 0x045b, "DellSCSI Array" },
1009         { 0x0491, "NetBlazerModems" },
1010         { 0x04ac, "OnTimeScheduler" },
1011         { 0x04b0, "CD-Net" },
1012         { 0x0513, "EmulexNQA" },
1013         { 0x0520, "SiteLockChecks" },
1014         { 0x0529, "SiteLockChecks" },
1015         { 0x052d, "CitrixOS2 AppServer" },
1016         { 0x0535, "Tektronix" },
1017         { 0x0536, "Milan" },
1018         { 0x055d, "Attachmate SNA gateway" },
1019         { 0x056b, "IBM8235 ModemServer" },
1020         { 0x056c, "ShivaLanRover/E PLUS" },
1021         { 0x056d, "ShivaLanRover/T PLUS" },
1022         { 0x0580, "McAfeeNetShield" },
1023         { 0x05B8, "NLM to workstation communication (Revelation Software)" },
1024         { 0x05BA, "CompatibleSystemsRouters" },
1025         { 0x05BE, "CheyenneHierarchicalStorageManager" },
1026         { 0x0606, "JCWatermarkImaging" },
1027         { 0x060c, "AXISNetworkPrinter" },
1028         { 0x0610, "AdaptecSCSIManagement" },
1029         { 0x0621, "IBM AntiVirus" },
1030         { 0x0640, "Windows95 RemoteRegistryService" },
1031         { 0x064e, "MicrosoftIIS" },
1032         { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1033         { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1034         { 0x076C, "Xerox" },
1035         { 0x079b, "ShivaLanRover/E 115" },
1036         { 0x079c, "ShivaLanRover/T 115" },
1037         { 0x07B4, "CubixWorldDesk" },
1038         { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
1039         { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
1040         { 0x0810, "ELAN License Server Demo" },
1041         { 0x0824, "ShivaLanRoverAccessSwitch/E" },
1042         { 0x086a, "ISSC Collector" },
1043         { 0x087f, "ISSC DAS AgentAIX" },
1044         { 0x0880, "Intel Netport PRO" },
1045         { 0x0881, "Intel Netport PRO" },
1046         { 0x0b29, "SiteLock" },
1047         { 0x0c29, "SiteLockApplications" },
1048         { 0x0c2c, "LicensingServer" },
1049         { 0x2101, "PerformanceTechnologyInstantInternet" },
1050         { 0x2380, "LAI SiteLock" },
1051         { 0x238c, "MeetingMaker" },
1052         { 0x4808, "SiteLockServer/SiteLockMetering" },
1053         { 0x5555, "SiteLockUser" },
1054         { 0x6312, "Tapeware" },
1055         { 0x6f00, "RabbitGateway" },
1056         { 0x7703, "MODEM" },
1057         { 0x8002, "NetPortPrinters" },
1058         { 0x8008, "WordPerfectNetworkVersion" },
1059         { 0x85BE, "Cisco EIGRP" },
1060         { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
1061         { 0x9000, "McAfeeNetShield" },
1062         { 0x9604, "CSA-NT_MON" },
1063         { 0xb6a8, "OceanIsleReachoutRemoteControl" },
1064         { 0xf11f, "SiteLockMetering" },
1065         { 0xf1ff, "SiteLock" },
1066         { 0xf503, "Microsoft SQL Server" },
1067         { 0xF905, "IBM TimeAndPlace" },
1068         { 0xfbfb, "TopCallIII FaxServer" },
1069         { 0xffff, "AnyService/Wildcard" },
1070         { 0, (char *)0 }
1071 };
1072
1073 static void
1074 init_ipxsaparray(void)
1075 {
1076         register int i;
1077         register struct hnamemem *table;
1078
1079         for (i = 0; ipxsap_db[i].s != NULL; i++) {
1080                 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
1081                 table = &ipxsaptable[j];
1082                 while (table->name)
1083                         table = table->nxt;
1084                 table->name = ipxsap_db[i].s;
1085                 table->addr = htons(ipxsap_db[i].v);
1086                 table->nxt = newhnamemem();
1087         }
1088 }
1089
1090 /*
1091  * Initialize the address to name translation machinery.  We map all
1092  * non-local IP addresses to numeric addresses if fflag is true (i.e.,
1093  * to prevent blocking on the nameserver).  localnet is the IP address
1094  * of the local network.  mask is its subnet mask.
1095  */
1096 void
1097 init_addrtoname(u_int32_t localnet, u_int32_t mask)
1098 {
1099         if (fflag) {
1100                 f_localnet = localnet;
1101                 f_netmask = mask;
1102         }
1103         if (nflag)
1104                 /*
1105                  * Simplest way to suppress names.
1106                  */
1107                 return;
1108
1109         init_etherarray();
1110         init_servarray();
1111         init_eprotoarray();
1112         init_llcsaparray();
1113         init_protoidarray();
1114         init_ipxsaparray();
1115 }
1116
1117 const char *
1118 dnaddr_string(u_short dnaddr)
1119 {
1120         register struct hnamemem *tp;
1121
1122         for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != 0;
1123              tp = tp->nxt)
1124                 if (tp->addr == dnaddr)
1125                         return (tp->name);
1126
1127         tp->addr = dnaddr;
1128         tp->nxt = newhnamemem();
1129         if (nflag)
1130                 tp->name = dnnum_string(dnaddr);
1131         else
1132                 tp->name = dnname_string(dnaddr);
1133
1134         return(tp->name);
1135 }
1136
1137 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
1138 struct hnamemem *
1139 newhnamemem(void)
1140 {
1141         register struct hnamemem *p;
1142         static struct hnamemem *ptr = NULL;
1143         static u_int num = 0;
1144
1145         if (num  <= 0) {
1146                 num = 64;
1147                 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
1148                 if (ptr == NULL)
1149                         error("newhnamemem: calloc");
1150         }
1151         --num;
1152         p = ptr++;
1153         return (p);
1154 }
1155
1156 #ifdef INET6
1157 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
1158 struct h6namemem *
1159 newh6namemem(void)
1160 {
1161         register struct h6namemem *p;
1162         static struct h6namemem *ptr = NULL;
1163         static u_int num = 0;
1164
1165         if (num  <= 0) {
1166                 num = 64;
1167                 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
1168                 if (ptr == NULL)
1169                         error("newh6namemem: calloc");
1170         }
1171         --num;
1172         p = ptr++;
1173         return (p);
1174 }
1175 #endif /* INET6 */