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 1.119 2007-08-08 14:06:34 hannes 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 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 "interface.h"
65 #include "addrtoname.h"
66 #include "llc.h"
67 #include "setsignal.h"
68 #include "extract.h"
69 #include "oui.h"
70
71 #ifndef ETHER_ADDR_LEN
72 #define ETHER_ADDR_LEN 6
73 #endif
74
75 /*
76 * hash tables for whatever-to-name translations
77 *
78 * XXX there has to be error checks against strdup(3) failure
79 */
80
81 #define HASHNAMESIZE 4096
82
83 struct hnamemem {
84 u_int32_t addr;
85 const char *name;
86 struct hnamemem *nxt;
87 };
88
89 static struct hnamemem hnametable[HASHNAMESIZE];
90 static struct hnamemem tporttable[HASHNAMESIZE];
91 static struct hnamemem uporttable[HASHNAMESIZE];
92 static struct hnamemem eprototable[HASHNAMESIZE];
93 static struct hnamemem dnaddrtable[HASHNAMESIZE];
94 static struct hnamemem ipxsaptable[HASHNAMESIZE];
95
96 #if defined(INET6) && defined(WIN32)
97 /*
98 * fake gethostbyaddr for Win2k/XP
99 * gethostbyaddr() returns incorrect value when AF_INET6 is passed
100 * to 3rd argument.
101 *
102 * h_name in struct hostent is only valid.
103 */
104 static struct hostent *
win32_gethostbyaddr(const char * addr,int len,int type)105 win32_gethostbyaddr(const char *addr, int len, int type)
106 {
107 static struct hostent host;
108 static char hostbuf[NI_MAXHOST];
109 char hname[NI_MAXHOST];
110 struct sockaddr_in6 addr6;
111
112 host.h_name = hostbuf;
113 switch (type) {
114 case AF_INET:
115 return gethostbyaddr(addr, len, type);
116 break;
117 case AF_INET6:
118 memset(&addr6, 0, sizeof(addr6));
119 addr6.sin6_family = AF_INET6;
120 memcpy(&addr6.sin6_addr, addr, len);
121 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
122 hname, sizeof(hname), NULL, 0, 0)) {
123 return NULL;
124 } else {
125 strcpy(host.h_name, hname);
126 return &host;
127 }
128 break;
129 default:
130 return NULL;
131 }
132 }
133 #define gethostbyaddr win32_gethostbyaddr
134 #endif /* INET6 & WIN32 */
135
136 #ifdef INET6
137 struct h6namemem {
138 struct in6_addr addr;
139 char *name;
140 struct h6namemem *nxt;
141 };
142
143 static struct h6namemem h6nametable[HASHNAMESIZE];
144 #endif /* INET6 */
145
146 struct enamemem {
147 u_short e_addr0;
148 u_short e_addr1;
149 u_short e_addr2;
150 const char *e_name;
151 u_char *e_nsap; /* used only for nsaptable[] */
152 #define e_bs e_nsap /* for bytestringtable */
153 struct enamemem *e_nxt;
154 };
155
156 static struct enamemem enametable[HASHNAMESIZE];
157 static struct enamemem nsaptable[HASHNAMESIZE];
158 static struct enamemem bytestringtable[HASHNAMESIZE];
159
160 struct protoidmem {
161 u_int32_t p_oui;
162 u_short p_proto;
163 const char *p_name;
164 struct protoidmem *p_nxt;
165 };
166
167 static struct protoidmem protoidtable[HASHNAMESIZE];
168
169 /*
170 * A faster replacement for inet_ntoa().
171 */
172 const char *
intoa(u_int32_t addr)173 intoa(u_int32_t addr)
174 {
175 register char *cp;
176 register u_int byte;
177 register int n;
178 static char buf[sizeof(".xxx.xxx.xxx.xxx")];
179
180 NTOHL(addr);
181 cp = buf + sizeof(buf);
182 *--cp = '\0';
183
184 n = 4;
185 do {
186 byte = addr & 0xff;
187 *--cp = byte % 10 + '0';
188 byte /= 10;
189 if (byte > 0) {
190 *--cp = byte % 10 + '0';
191 byte /= 10;
192 if (byte > 0)
193 *--cp = byte + '0';
194 }
195 *--cp = '.';
196 addr >>= 8;
197 } while (--n > 0);
198
199 return cp + 1;
200 }
201
202 static u_int32_t f_netmask;
203 static u_int32_t f_localnet;
204
205 /*
206 * Return a name for the IP address pointed to by ap. This address
207 * is assumed to be in network byte order.
208 *
209 * NOTE: ap is *NOT* necessarily part of the packet data (not even if
210 * this is being called with the "ipaddr_string()" macro), so you
211 * *CANNOT* use the TCHECK{2}/TTEST{2} macros on it. Furthermore,
212 * even in cases where it *is* part of the packet data, the caller
213 * would still have to check for a null return value, even if it's
214 * just printing the return value with "%s" - not all versions of
215 * printf print "(null)" with "%s" and a null pointer, some of them
216 * don't check for a null pointer and crash in that case.
217 *
218 * The callers of this routine should, before handing this routine
219 * a pointer to packet data, be sure that the data is present in
220 * the packet buffer. They should probably do those checks anyway,
221 * as other data at that layer might not be IP addresses, and it
222 * also needs to check whether they're present in the packet buffer.
223 */
224 const char *
getname(const u_char * ap)225 getname(const u_char *ap)
226 {
227 register struct hostent *hp;
228 u_int32_t addr;
229 static struct hnamemem *p; /* static for longjmp() */
230
231 memcpy(&addr, ap, sizeof(addr));
232 p = &hnametable[addr & (HASHNAMESIZE-1)];
233 for (; p->nxt; p = p->nxt) {
234 if (p->addr == addr)
235 return (p->name);
236 }
237 p->addr = addr;
238 p->nxt = newhnamemem();
239
240 /*
241 * Print names unless:
242 * (1) -n was given.
243 * (2) Address is foreign and -f was given. (If -f was not
244 * given, f_netmask and f_localnet are 0 and the test
245 * evaluates to true)
246 */
247 if (!nflag &&
248 (addr & f_netmask) == f_localnet) {
249 hp = gethostbyaddr((char *)&addr, 4, AF_INET);
250 if (hp) {
251 char *dotp;
252
253 p->name = strdup(hp->h_name);
254 if (Nflag) {
255 /* Remove domain qualifications */
256 dotp = strchr(p->name, '.');
257 if (dotp)
258 *dotp = '\0';
259 }
260 return (p->name);
261 }
262 }
263 p->name = strdup(intoa(addr));
264 return (p->name);
265 }
266
267 #ifdef INET6
268 /*
269 * Return a name for the IP6 address pointed to by ap. This address
270 * is assumed to be in network byte order.
271 */
272 const char *
getname6(const u_char * ap)273 getname6(const u_char *ap)
274 {
275 register struct hostent *hp;
276 union {
277 struct in6_addr addr;
278 struct for_hash_addr {
279 char fill[14];
280 u_int16_t d;
281 } addra;
282 } addr;
283 static struct h6namemem *p; /* static for longjmp() */
284 register const char *cp;
285 char ntop_buf[INET6_ADDRSTRLEN];
286
287 memcpy(&addr, ap, sizeof(addr));
288 p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)];
289 for (; p->nxt; p = p->nxt) {
290 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
291 return (p->name);
292 }
293 p->addr = addr.addr;
294 p->nxt = newh6namemem();
295
296 /*
297 * Do not print names if -n was given.
298 */
299 if (!nflag) {
300 hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6);
301 if (hp) {
302 char *dotp;
303
304 p->name = strdup(hp->h_name);
305 if (Nflag) {
306 /* Remove domain qualifications */
307 dotp = strchr(p->name, '.');
308 if (dotp)
309 *dotp = '\0';
310 }
311 return (p->name);
312 }
313 }
314 cp = inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf));
315 p->name = strdup(cp);
316 return (p->name);
317 }
318 #endif /* INET6 */
319
320 static const char hex[] = "0123456789abcdef";
321
322
323 /* Find the hash node that corresponds the ether address 'ep' */
324
325 static inline struct enamemem *
lookup_emem(const u_char * ep)326 lookup_emem(const u_char *ep)
327 {
328 register u_int i, j, k;
329 struct enamemem *tp;
330
331 k = (ep[0] << 8) | ep[1];
332 j = (ep[2] << 8) | ep[3];
333 i = (ep[4] << 8) | ep[5];
334
335 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
336 while (tp->e_nxt)
337 if (tp->e_addr0 == i &&
338 tp->e_addr1 == j &&
339 tp->e_addr2 == k)
340 return tp;
341 else
342 tp = tp->e_nxt;
343 tp->e_addr0 = i;
344 tp->e_addr1 = j;
345 tp->e_addr2 = k;
346 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
347 if (tp->e_nxt == NULL)
348 error("lookup_emem: calloc");
349
350 return tp;
351 }
352
353 /*
354 * Find the hash node that corresponds to the bytestring 'bs'
355 * with length 'nlen'
356 */
357
358 static inline struct enamemem *
lookup_bytestring(register const u_char * bs,const unsigned int nlen)359 lookup_bytestring(register const u_char *bs, const unsigned int nlen)
360 {
361 struct enamemem *tp;
362 register u_int i, j, k;
363
364 if (nlen >= 6) {
365 k = (bs[0] << 8) | bs[1];
366 j = (bs[2] << 8) | bs[3];
367 i = (bs[4] << 8) | bs[5];
368 } else if (nlen >= 4) {
369 k = (bs[0] << 8) | bs[1];
370 j = (bs[2] << 8) | bs[3];
371 i = 0;
372 } else
373 i = j = k = 0;
374
375 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
376 while (tp->e_nxt)
377 if (tp->e_addr0 == i &&
378 tp->e_addr1 == j &&
379 tp->e_addr2 == k &&
380 memcmp((const char *)bs, (const char *)(tp->e_bs), nlen) == 0)
381 return tp;
382 else
383 tp = tp->e_nxt;
384
385 tp->e_addr0 = i;
386 tp->e_addr1 = j;
387 tp->e_addr2 = k;
388
389 tp->e_bs = (u_char *) calloc(1, nlen + 1);
390 if (tp->e_bs == NULL)
391 error("lookup_bytestring: calloc");
392
393 memcpy(tp->e_bs, bs, nlen);
394 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
395 if (tp->e_nxt == NULL)
396 error("lookup_bytestring: calloc");
397
398 return tp;
399 }
400
401 /* Find the hash node that corresponds the NSAP 'nsap' */
402
403 static inline struct enamemem *
lookup_nsap(register const u_char * nsap)404 lookup_nsap(register const u_char *nsap)
405 {
406 register u_int i, j, k;
407 unsigned int nlen = *nsap;
408 struct enamemem *tp;
409 const u_char *ensap = nsap + nlen - 6;
410
411 if (nlen > 6) {
412 k = (ensap[0] << 8) | ensap[1];
413 j = (ensap[2] << 8) | ensap[3];
414 i = (ensap[4] << 8) | ensap[5];
415 }
416 else
417 i = j = k = 0;
418
419 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
420 while (tp->e_nxt)
421 if (tp->e_addr0 == i &&
422 tp->e_addr1 == j &&
423 tp->e_addr2 == k &&
424 tp->e_nsap[0] == nlen &&
425 memcmp((const char *)&(nsap[1]),
426 (char *)&(tp->e_nsap[1]), nlen) == 0)
427 return tp;
428 else
429 tp = tp->e_nxt;
430 tp->e_addr0 = i;
431 tp->e_addr1 = j;
432 tp->e_addr2 = k;
433 tp->e_nsap = (u_char *)malloc(nlen + 1);
434 if (tp->e_nsap == NULL)
435 error("lookup_nsap: malloc");
436 memcpy((char *)tp->e_nsap, (const char *)nsap, nlen + 1);
437 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
438 if (tp->e_nxt == NULL)
439 error("lookup_nsap: calloc");
440
441 return tp;
442 }
443
444 /* Find the hash node that corresponds the protoid 'pi'. */
445
446 static inline struct protoidmem *
lookup_protoid(const u_char * pi)447 lookup_protoid(const u_char *pi)
448 {
449 register u_int i, j;
450 struct protoidmem *tp;
451
452 /* 5 octets won't be aligned */
453 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
454 j = (pi[3] << 8) + pi[4];
455 /* XXX should be endian-insensitive, but do big-endian testing XXX */
456
457 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
458 while (tp->p_nxt)
459 if (tp->p_oui == i && tp->p_proto == j)
460 return tp;
461 else
462 tp = tp->p_nxt;
463 tp->p_oui = i;
464 tp->p_proto = j;
465 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
466 if (tp->p_nxt == NULL)
467 error("lookup_protoid: calloc");
468
469 return tp;
470 }
471
472 const char *
etheraddr_string(register const u_char * ep)473 etheraddr_string(register const u_char *ep)
474 {
475 register int i;
476 register char *cp;
477 register struct enamemem *tp;
478 int oui;
479 char buf[BUFSIZE];
480
481 tp = lookup_emem(ep);
482 if (tp->e_name)
483 return (tp->e_name);
484 #ifdef USE_ETHER_NTOHOST
485 if (!nflag) {
486 char buf2[BUFSIZE];
487
488 /*
489 * We don't cast it to "const struct ether_addr *"
490 * because some systems fail to declare the second
491 * argument as a "const" pointer, even though they
492 * don't modify what it points to.
493 */
494 if (ether_ntohost(buf2, (struct ether_addr *)ep) == 0) {
495 tp->e_name = strdup(buf2);
496 return (tp->e_name);
497 }
498 }
499 #endif
500 cp = buf;
501 oui = EXTRACT_24BITS(ep);
502 *cp++ = hex[*ep >> 4 ];
503 *cp++ = hex[*ep++ & 0xf];
504 for (i = 5; --i >= 0;) {
505 *cp++ = ':';
506 *cp++ = hex[*ep >> 4 ];
507 *cp++ = hex[*ep++ & 0xf];
508 }
509
510 if (!nflag) {
511 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)",
512 tok2str(oui_values, "Unknown", oui));
513 } else
514 *cp = '\0';
515 tp->e_name = strdup(buf);
516 return (tp->e_name);
517 }
518
519 const char *
le64addr_string(const u_char * ep)520 le64addr_string(const u_char *ep)
521 {
522 const unsigned int len = 8;
523 register u_int i;
524 register char *cp;
525 register struct enamemem *tp;
526 char buf[BUFSIZE];
527
528 tp = lookup_bytestring(ep, len);
529 if (tp->e_name)
530 return (tp->e_name);
531
532 cp = buf;
533 for (i = len; i > 0 ; --i) {
534 *cp++ = hex[*(ep + i - 1) >> 4];
535 *cp++ = hex[*(ep + i - 1) & 0xf];
536 *cp++ = ':';
537 }
538 cp --;
539
540 *cp = '\0';
541
542 tp->e_name = strdup(buf);
543
544 return (tp->e_name);
545 }
546
547 const char *
linkaddr_string(const u_char * ep,const unsigned int type,const unsigned int len)548 linkaddr_string(const u_char *ep, const unsigned int type, const unsigned int len)
549 {
550 register u_int i;
551 register char *cp;
552 register struct enamemem *tp;
553
554 if (len == 0)
555 return ("<empty>");
556
557 if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN)
558 return (etheraddr_string(ep));
559
560 if (type == LINKADDR_FRELAY)
561 return (q922_string(ep));
562
563 tp = lookup_bytestring(ep, len);
564 if (tp->e_name)
565 return (tp->e_name);
566
567 tp->e_name = cp = (char *)malloc(len*3);
568 if (tp->e_name == NULL)
569 error("linkaddr_string: malloc");
570 *cp++ = hex[*ep >> 4];
571 *cp++ = hex[*ep++ & 0xf];
572 for (i = len-1; i > 0 ; --i) {
573 *cp++ = ':';
574 *cp++ = hex[*ep >> 4];
575 *cp++ = hex[*ep++ & 0xf];
576 }
577 *cp = '\0';
578 return (tp->e_name);
579 }
580
581 const char *
etherproto_string(u_short port)582 etherproto_string(u_short port)
583 {
584 register char *cp;
585 register struct hnamemem *tp;
586 register u_int32_t i = port;
587 char buf[sizeof("0000")];
588
589 for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
590 if (tp->addr == i)
591 return (tp->name);
592
593 tp->addr = i;
594 tp->nxt = newhnamemem();
595
596 cp = buf;
597 NTOHS(port);
598 *cp++ = hex[port >> 12 & 0xf];
599 *cp++ = hex[port >> 8 & 0xf];
600 *cp++ = hex[port >> 4 & 0xf];
601 *cp++ = hex[port & 0xf];
602 *cp++ = '\0';
603 tp->name = strdup(buf);
604 return (tp->name);
605 }
606
607 const char *
protoid_string(register const u_char * pi)608 protoid_string(register const u_char *pi)
609 {
610 register u_int i, j;
611 register char *cp;
612 register struct protoidmem *tp;
613 char buf[sizeof("00:00:00:00:00")];
614
615 tp = lookup_protoid(pi);
616 if (tp->p_name)
617 return tp->p_name;
618
619 cp = buf;
620 if ((j = *pi >> 4) != 0)
621 *cp++ = hex[j];
622 *cp++ = hex[*pi++ & 0xf];
623 for (i = 4; (int)--i >= 0;) {
624 *cp++ = ':';
625 if ((j = *pi >> 4) != 0)
626 *cp++ = hex[j];
627 *cp++ = hex[*pi++ & 0xf];
628 }
629 *cp = '\0';
630 tp->p_name = strdup(buf);
631 return (tp->p_name);
632 }
633
634 #define ISONSAP_MAX_LENGTH 20
635 const char *
isonsap_string(const u_char * nsap,register u_int nsap_length)636 isonsap_string(const u_char *nsap, register u_int nsap_length)
637 {
638 register u_int nsap_idx;
639 register char *cp;
640 register struct enamemem *tp;
641
642 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH)
643 return ("isonsap_string: illegal length");
644
645 tp = lookup_nsap(nsap);
646 if (tp->e_name)
647 return tp->e_name;
648
649 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx"));
650 if (cp == NULL)
651 error("isonsap_string: malloc");
652
653 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
654 *cp++ = hex[*nsap >> 4];
655 *cp++ = hex[*nsap++ & 0xf];
656 if (((nsap_idx & 1) == 0) &&
657 (nsap_idx + 1 < nsap_length)) {
658 *cp++ = '.';
659 }
660 }
661 *cp = '\0';
662 return (tp->e_name);
663 }
664
665 const char *
tcpport_string(u_short port)666 tcpport_string(u_short port)
667 {
668 register struct hnamemem *tp;
669 register u_int32_t i = port;
670 char buf[sizeof("00000")];
671
672 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
673 if (tp->addr == i)
674 return (tp->name);
675
676 tp->addr = i;
677 tp->nxt = newhnamemem();
678
679 (void)snprintf(buf, sizeof(buf), "%u", i);
680 tp->name = strdup(buf);
681 return (tp->name);
682 }
683
684 const char *
udpport_string(register u_short port)685 udpport_string(register u_short port)
686 {
687 register struct hnamemem *tp;
688 register u_int32_t i = port;
689 char buf[sizeof("00000")];
690
691 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
692 if (tp->addr == i)
693 return (tp->name);
694
695 tp->addr = i;
696 tp->nxt = newhnamemem();
697
698 (void)snprintf(buf, sizeof(buf), "%u", i);
699 tp->name = strdup(buf);
700 return (tp->name);
701 }
702
703 const char *
ipxsap_string(u_short port)704 ipxsap_string(u_short port)
705 {
706 register char *cp;
707 register struct hnamemem *tp;
708 register u_int32_t i = port;
709 char buf[sizeof("0000")];
710
711 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
712 if (tp->addr == i)
713 return (tp->name);
714
715 tp->addr = i;
716 tp->nxt = newhnamemem();
717
718 cp = buf;
719 NTOHS(port);
720 *cp++ = hex[port >> 12 & 0xf];
721 *cp++ = hex[port >> 8 & 0xf];
722 *cp++ = hex[port >> 4 & 0xf];
723 *cp++ = hex[port & 0xf];
724 *cp++ = '\0';
725 tp->name = strdup(buf);
726 return (tp->name);
727 }
728
729 static void
init_servarray(void)730 init_servarray(void)
731 {
732 struct servent *sv;
733 register struct hnamemem *table;
734 register int i;
735 char buf[sizeof("0000000000")];
736
737 while ((sv = getservent()) != NULL) {
738 int port = ntohs(sv->s_port);
739 i = port & (HASHNAMESIZE-1);
740 if (strcmp(sv->s_proto, "tcp") == 0)
741 table = &tporttable[i];
742 else if (strcmp(sv->s_proto, "udp") == 0)
743 table = &uporttable[i];
744 else
745 continue;
746
747 while (table->name)
748 table = table->nxt;
749 if (nflag) {
750 (void)snprintf(buf, sizeof(buf), "%d", port);
751 table->name = strdup(buf);
752 } else
753 table->name = strdup(sv->s_name);
754 table->addr = port;
755 table->nxt = newhnamemem();
756 }
757 endservent();
758 }
759
760 /* in libpcap.a (nametoaddr.c) */
761 #if defined(WIN32) && !defined(USE_STATIC_LIBPCAP)
762 __declspec(dllimport)
763 #else
764 extern
765 #endif
766 const struct eproto {
767 const char *s;
768 u_short p;
769 } eproto_db[];
770
771 static void
init_eprotoarray(void)772 init_eprotoarray(void)
773 {
774 register int i;
775 register struct hnamemem *table;
776
777 for (i = 0; eproto_db[i].s; i++) {
778 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
779 table = &eprototable[j];
780 while (table->name)
781 table = table->nxt;
782 table->name = eproto_db[i].s;
783 table->addr = htons(eproto_db[i].p);
784 table->nxt = newhnamemem();
785 }
786 }
787
788 static const struct protoidlist {
789 const u_char protoid[5];
790 const char *name;
791 } protoidlist[] = {
792 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
793 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
794 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
795 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
796 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
797 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
798 };
799
800 /*
801 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
802 * types.
803 */
804 static void
init_protoidarray(void)805 init_protoidarray(void)
806 {
807 register int i;
808 register struct protoidmem *tp;
809 const struct protoidlist *pl;
810 u_char protoid[5];
811
812 protoid[0] = 0;
813 protoid[1] = 0;
814 protoid[2] = 0;
815 for (i = 0; eproto_db[i].s; i++) {
816 u_short etype = htons(eproto_db[i].p);
817
818 memcpy((char *)&protoid[3], (char *)&etype, 2);
819 tp = lookup_protoid(protoid);
820 tp->p_name = strdup(eproto_db[i].s);
821 }
822 /* Hardwire some SNAP proto ID names */
823 for (pl = protoidlist; pl->name != NULL; ++pl) {
824 tp = lookup_protoid(pl->protoid);
825 /* Don't override existing name */
826 if (tp->p_name != NULL)
827 continue;
828
829 tp->p_name = pl->name;
830 }
831 }
832
833 static const struct etherlist {
834 const u_char addr[6];
835 const char *name;
836 } etherlist[] = {
837 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
838 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
839 };
840
841 /*
842 * Initialize the ethers hash table. We take two different approaches
843 * depending on whether or not the system provides the ethers name
844 * service. If it does, we just wire in a few names at startup,
845 * and etheraddr_string() fills in the table on demand. If it doesn't,
846 * then we suck in the entire /etc/ethers file at startup. The idea
847 * is that parsing the local file will be fast, but spinning through
848 * all the ethers entries via NIS & next_etherent might be very slow.
849 *
850 * XXX pcap_next_etherent doesn't belong in the pcap interface, but
851 * since the pcap module already does name-to-address translation,
852 * it's already does most of the work for the ethernet address-to-name
853 * translation, so we just pcap_next_etherent as a convenience.
854 */
855 static void
init_etherarray(void)856 init_etherarray(void)
857 {
858 register const struct etherlist *el;
859 register struct enamemem *tp;
860 #ifdef USE_ETHER_NTOHOST
861 char name[256];
862 #else
863 register struct pcap_etherent *ep;
864 register FILE *fp;
865
866 /* Suck in entire ethers file */
867 fp = fopen(PCAP_ETHERS_FILE, "r");
868 if (fp != NULL) {
869 while ((ep = pcap_next_etherent(fp)) != NULL) {
870 tp = lookup_emem(ep->addr);
871 tp->e_name = strdup(ep->name);
872 }
873 (void)fclose(fp);
874 }
875 #endif
876
877 /* Hardwire some ethernet names */
878 for (el = etherlist; el->name != NULL; ++el) {
879 tp = lookup_emem(el->addr);
880 /* Don't override existing name */
881 if (tp->e_name != NULL)
882 continue;
883
884 #ifdef USE_ETHER_NTOHOST
885 /*
886 * Use YP/NIS version of name if available.
887 *
888 * We don't cast it to "const struct ether_addr *"
889 * because some systems don't modify the Ethernet
890 * address but fail to declare the second argument
891 * as a "const" pointer.
892 */
893 if (ether_ntohost(name, (struct ether_addr *)el->addr) == 0) {
894 tp->e_name = strdup(name);
895 continue;
896 }
897 #endif
898 tp->e_name = el->name;
899 }
900 }
901
902 static const struct tok ipxsap_db[] = {
903 { 0x0000, "Unknown" },
904 { 0x0001, "User" },
905 { 0x0002, "User Group" },
906 { 0x0003, "PrintQueue" },
907 { 0x0004, "FileServer" },
908 { 0x0005, "JobServer" },
909 { 0x0006, "Gateway" },
910 { 0x0007, "PrintServer" },
911 { 0x0008, "ArchiveQueue" },
912 { 0x0009, "ArchiveServer" },
913 { 0x000a, "JobQueue" },
914 { 0x000b, "Administration" },
915 { 0x000F, "Novell TI-RPC" },
916 { 0x0017, "Diagnostics" },
917 { 0x0020, "NetBIOS" },
918 { 0x0021, "NAS SNA Gateway" },
919 { 0x0023, "NACS AsyncGateway" },
920 { 0x0024, "RemoteBridge/RoutingService" },
921 { 0x0026, "BridgeServer" },
922 { 0x0027, "TCP/IP Gateway" },
923 { 0x0028, "Point-to-point X.25 BridgeServer" },
924 { 0x0029, "3270 Gateway" },
925 { 0x002a, "CHI Corp" },
926 { 0x002c, "PC Chalkboard" },
927 { 0x002d, "TimeSynchServer" },
928 { 0x002e, "ARCserve5.0/PalindromeBackup" },
929 { 0x0045, "DI3270 Gateway" },
930 { 0x0047, "AdvertisingPrintServer" },
931 { 0x004a, "NetBlazerModems" },
932 { 0x004b, "BtrieveVAP" },
933 { 0x004c, "NetwareSQL" },
934 { 0x004d, "XtreeNetwork" },
935 { 0x0050, "BtrieveVAP4.11" },
936 { 0x0052, "QuickLink" },
937 { 0x0053, "PrintQueueUser" },
938 { 0x0058, "Multipoint X.25 Router" },
939 { 0x0060, "STLB/NLM" },
940 { 0x0064, "ARCserve" },
941 { 0x0066, "ARCserve3.0" },
942 { 0x0072, "WAN CopyUtility" },
943 { 0x007a, "TES-NetwareVMS" },
944 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
945 { 0x0095, "DDA OBGYN" },
946 { 0x0098, "NetwareAccessServer" },
947 { 0x009a, "Netware for VMS II/NamedPipeServer" },
948 { 0x009b, "NetwareAccessServer" },
949 { 0x009e, "PortableNetwareServer/SunLinkNVT" },
950 { 0x00a1, "PowerchuteAPC UPS" },
951 { 0x00aa, "LAWserve" },
952 { 0x00ac, "CompaqIDA StatusMonitor" },
953 { 0x0100, "PIPE STAIL" },
954 { 0x0102, "LAN ProtectBindery" },
955 { 0x0103, "OracleDataBaseServer" },
956 { 0x0107, "Netware386/RSPX RemoteConsole" },
957 { 0x010f, "NovellSNA Gateway" },
958 { 0x0111, "TestServer" },
959 { 0x0112, "HP PrintServer" },
960 { 0x0114, "CSA MUX" },
961 { 0x0115, "CSA LCA" },
962 { 0x0116, "CSA CM" },
963 { 0x0117, "CSA SMA" },
964 { 0x0118, "CSA DBA" },
965 { 0x0119, "CSA NMA" },
966 { 0x011a, "CSA SSA" },
967 { 0x011b, "CSA STATUS" },
968 { 0x011e, "CSA APPC" },
969 { 0x0126, "SNA TEST SSA Profile" },
970 { 0x012a, "CSA TRACE" },
971 { 0x012b, "NetwareSAA" },
972 { 0x012e, "IKARUS VirusScan" },
973 { 0x0130, "CommunicationsExecutive" },
974 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
975 { 0x0135, "NetwareNamingServicesProfile" },
976 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
977 { 0x0141, "LAN SpoolServer" },
978 { 0x0152, "IRMALAN Gateway" },
979 { 0x0154, "NamedPipeServer" },
980 { 0x0166, "NetWareManagement" },
981 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
982 { 0x0173, "Compaq" },
983 { 0x0174, "Compaq SNMP Agent" },
984 { 0x0175, "Compaq" },
985 { 0x0180, "XTreeServer/XTreeTools" },
986 { 0x018A, "NASI ServicesBroadcastServer" },
987 { 0x01b0, "GARP Gateway" },
988 { 0x01b1, "Binfview" },
989 { 0x01bf, "IntelLanDeskManager" },
990 { 0x01ca, "AXTEC" },
991 { 0x01cb, "ShivaNetModem/E" },
992 { 0x01cc, "ShivaLanRover/E" },
993 { 0x01cd, "ShivaLanRover/T" },
994 { 0x01ce, "ShivaUniversal" },
995 { 0x01d8, "CastelleFAXPressServer" },
996 { 0x01da, "CastelleLANPressPrintServer" },
997 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
998 { 0x01f0, "LEGATO" },
999 { 0x01f5, "LEGATO" },
1000 { 0x0233, "NMS Agent/NetwareManagementAgent" },
1001 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
1002 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
1003 { 0x023a, "LANtern" },
1004 { 0x023c, "MAVERICK" },
1005 { 0x023f, "NovellSMDR" },
1006 { 0x024e, "NetwareConnect" },
1007 { 0x024f, "NASI ServerBroadcast Cisco" },
1008 { 0x026a, "NMS ServiceConsole" },
1009 { 0x026b, "TimeSynchronizationServer Netware 4.x" },
1010 { 0x0278, "DirectoryServer Netware 4.x" },
1011 { 0x027b, "NetwareManagementAgent" },
1012 { 0x0280, "Novell File and Printer Sharing Service for PC" },
1013 { 0x0304, "NovellSAA Gateway" },
1014 { 0x0308, "COM/VERMED" },
1015 { 0x030a, "GalacticommWorldgroupServer" },
1016 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
1017 { 0x0320, "AttachmateGateway" },
1018 { 0x0327, "MicrosoftDiagnostiocs" },
1019 { 0x0328, "WATCOM SQL Server" },
1020 { 0x0335, "MultiTechSystems MultisynchCommServer" },
1021 { 0x0343, "Xylogics RemoteAccessServer/LANModem" },
1022 { 0x0355, "ArcadaBackupExec" },
1023 { 0x0358, "MSLCD1" },
1024 { 0x0361, "NETINELO" },
1025 { 0x037e, "Powerchute UPS Monitoring" },
1026 { 0x037f, "ViruSafeNotify" },
1027 { 0x0386, "HP Bridge" },
1028 { 0x0387, "HP Hub" },
1029 { 0x0394, "NetWare SAA Gateway" },
1030 { 0x039b, "LotusNotes" },
1031 { 0x03b7, "CertusAntiVirus" },
1032 { 0x03c4, "ARCserve4.0" },
1033 { 0x03c7, "LANspool3.5" },
1034 { 0x03d7, "LexmarkPrinterServer" },
1035 { 0x03d8, "LexmarkXLE PrinterServer" },
1036 { 0x03dd, "BanyanENS NetwareClient" },
1037 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
1038 { 0x03e1, "UnivelUnixware" },
1039 { 0x03e4, "UnivelUnixware" },
1040 { 0x03fc, "IntelNetport" },
1041 { 0x03fd, "PrintServerQueue" },
1042 { 0x040A, "ipnServer" },
1043 { 0x040D, "LVERRMAN" },
1044 { 0x040E, "LVLIC" },
1045 { 0x0414, "NET Silicon (DPI)/Kyocera" },
1046 { 0x0429, "SiteLockVirus" },
1047 { 0x0432, "UFHELPR???" },
1048 { 0x0433, "Synoptics281xAdvancedSNMPAgent" },
1049 { 0x0444, "MicrosoftNT SNA Server" },
1050 { 0x0448, "Oracle" },
1051 { 0x044c, "ARCserve5.01" },
1052 { 0x0457, "CanonGP55" },
1053 { 0x045a, "QMS Printers" },
1054 { 0x045b, "DellSCSI Array" },
1055 { 0x0491, "NetBlazerModems" },
1056 { 0x04ac, "OnTimeScheduler" },
1057 { 0x04b0, "CD-Net" },
1058 { 0x0513, "EmulexNQA" },
1059 { 0x0520, "SiteLockChecks" },
1060 { 0x0529, "SiteLockChecks" },
1061 { 0x052d, "CitrixOS2 AppServer" },
1062 { 0x0535, "Tektronix" },
1063 { 0x0536, "Milan" },
1064 { 0x055d, "Attachmate SNA gateway" },
1065 { 0x056b, "IBM8235 ModemServer" },
1066 { 0x056c, "ShivaLanRover/E PLUS" },
1067 { 0x056d, "ShivaLanRover/T PLUS" },
1068 { 0x0580, "McAfeeNetShield" },
1069 { 0x05B8, "NLM to workstation communication (Revelation Software)" },
1070 { 0x05BA, "CompatibleSystemsRouters" },
1071 { 0x05BE, "CheyenneHierarchicalStorageManager" },
1072 { 0x0606, "JCWatermarkImaging" },
1073 { 0x060c, "AXISNetworkPrinter" },
1074 { 0x0610, "AdaptecSCSIManagement" },
1075 { 0x0621, "IBM AntiVirus" },
1076 { 0x0640, "Windows95 RemoteRegistryService" },
1077 { 0x064e, "MicrosoftIIS" },
1078 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1079 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1080 { 0x076C, "Xerox" },
1081 { 0x079b, "ShivaLanRover/E 115" },
1082 { 0x079c, "ShivaLanRover/T 115" },
1083 { 0x07B4, "CubixWorldDesk" },
1084 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
1085 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
1086 { 0x0810, "ELAN License Server Demo" },
1087 { 0x0824, "ShivaLanRoverAccessSwitch/E" },
1088 { 0x086a, "ISSC Collector" },
1089 { 0x087f, "ISSC DAS AgentAIX" },
1090 { 0x0880, "Intel Netport PRO" },
1091 { 0x0881, "Intel Netport PRO" },
1092 { 0x0b29, "SiteLock" },
1093 { 0x0c29, "SiteLockApplications" },
1094 { 0x0c2c, "LicensingServer" },
1095 { 0x2101, "PerformanceTechnologyInstantInternet" },
1096 { 0x2380, "LAI SiteLock" },
1097 { 0x238c, "MeetingMaker" },
1098 { 0x4808, "SiteLockServer/SiteLockMetering" },
1099 { 0x5555, "SiteLockUser" },
1100 { 0x6312, "Tapeware" },
1101 { 0x6f00, "RabbitGateway" },
1102 { 0x7703, "MODEM" },
1103 { 0x8002, "NetPortPrinters" },
1104 { 0x8008, "WordPerfectNetworkVersion" },
1105 { 0x85BE, "Cisco EIGRP" },
1106 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
1107 { 0x9000, "McAfeeNetShield" },
1108 { 0x9604, "CSA-NT_MON" },
1109 { 0xb6a8, "OceanIsleReachoutRemoteControl" },
1110 { 0xf11f, "SiteLockMetering" },
1111 { 0xf1ff, "SiteLock" },
1112 { 0xf503, "Microsoft SQL Server" },
1113 { 0xF905, "IBM TimeAndPlace" },
1114 { 0xfbfb, "TopCallIII FaxServer" },
1115 { 0xffff, "AnyService/Wildcard" },
1116 { 0, (char *)0 }
1117 };
1118
1119 static void
init_ipxsaparray(void)1120 init_ipxsaparray(void)
1121 {
1122 register int i;
1123 register struct hnamemem *table;
1124
1125 for (i = 0; ipxsap_db[i].s != NULL; i++) {
1126 int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
1127 table = &ipxsaptable[j];
1128 while (table->name)
1129 table = table->nxt;
1130 table->name = ipxsap_db[i].s;
1131 table->addr = htons(ipxsap_db[i].v);
1132 table->nxt = newhnamemem();
1133 }
1134 }
1135
1136 /*
1137 * Initialize the address to name translation machinery. We map all
1138 * non-local IP addresses to numeric addresses if fflag is true (i.e.,
1139 * to prevent blocking on the nameserver). localnet is the IP address
1140 * of the local network. mask is its subnet mask.
1141 */
1142 void
init_addrtoname(u_int32_t localnet,u_int32_t mask)1143 init_addrtoname(u_int32_t localnet, u_int32_t mask)
1144 {
1145 if (fflag) {
1146 f_localnet = localnet;
1147 f_netmask = mask;
1148 }
1149 if (nflag)
1150 /*
1151 * Simplest way to suppress names.
1152 */
1153 return;
1154
1155 init_etherarray();
1156 init_servarray();
1157 init_eprotoarray();
1158 init_protoidarray();
1159 init_ipxsaparray();
1160 }
1161
1162 const char *
dnaddr_string(u_short dnaddr)1163 dnaddr_string(u_short dnaddr)
1164 {
1165 register struct hnamemem *tp;
1166
1167 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != 0;
1168 tp = tp->nxt)
1169 if (tp->addr == dnaddr)
1170 return (tp->name);
1171
1172 tp->addr = dnaddr;
1173 tp->nxt = newhnamemem();
1174 if (nflag)
1175 tp->name = dnnum_string(dnaddr);
1176 else
1177 tp->name = dnname_string(dnaddr);
1178
1179 return(tp->name);
1180 }
1181
1182 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
1183 struct hnamemem *
newhnamemem(void)1184 newhnamemem(void)
1185 {
1186 register struct hnamemem *p;
1187 static struct hnamemem *ptr = NULL;
1188 static u_int num = 0;
1189
1190 if (num <= 0) {
1191 num = 64;
1192 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
1193 if (ptr == NULL)
1194 error("newhnamemem: calloc");
1195 }
1196 --num;
1197 p = ptr++;
1198 return (p);
1199 }
1200
1201 #ifdef INET6
1202 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
1203 struct h6namemem *
newh6namemem(void)1204 newh6namemem(void)
1205 {
1206 register struct h6namemem *p;
1207 static struct h6namemem *ptr = NULL;
1208 static u_int num = 0;
1209
1210 if (num <= 0) {
1211 num = 64;
1212 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
1213 if (ptr == NULL)
1214 error("newh6namemem: calloc");
1215 }
1216 --num;
1217 p = ptr++;
1218 return (p);
1219 }
1220 #endif /* INET6 */
1221