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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 #include <netdissect-stdinc.h>
30 
31 #ifdef USE_ETHER_NTOHOST
32 #ifdef HAVE_NETINET_IF_ETHER_H
33 struct mbuf;		/* Squelch compiler warnings on some platforms for */
34 struct rtentry;		/* declarations in <net/if.h> */
35 #include <net/if.h>	/* for "struct ifnet" in "struct arpcom" on Solaris */
36 #include <netinet/if_ether.h>
37 #endif /* HAVE_NETINET_IF_ETHER_H */
38 #ifdef NETINET_ETHER_H_DECLARES_ETHER_NTOHOST
39 #include <netinet/ether.h>
40 #endif /* NETINET_ETHER_H_DECLARES_ETHER_NTOHOST */
41 
42 #if !defined(HAVE_DECL_ETHER_NTOHOST) || !HAVE_DECL_ETHER_NTOHOST
43 #ifndef HAVE_STRUCT_ETHER_ADDR
44 struct ether_addr {
45 	unsigned char ether_addr_octet[6];
46 };
47 #endif
48 extern int ether_ntohost(char *, const struct ether_addr *);
49 #endif
50 
51 #endif /* USE_ETHER_NTOHOST */
52 
53 #include <pcap.h>
54 #include <pcap-namedb.h>
55 #include <signal.h>
56 #include <stdio.h>
57 #include <string.h>
58 #include <stdlib.h>
59 
60 #include "netdissect.h"
61 #include "addrtoname.h"
62 #include "addrtostr.h"
63 #include "ethertype.h"
64 #include "llc.h"
65 #include "setsignal.h"
66 #include "extract.h"
67 #include "oui.h"
68 
69 #ifndef ETHER_ADDR_LEN
70 #define ETHER_ADDR_LEN	6
71 #endif
72 
73 /*
74  * hash tables for whatever-to-name translations
75  *
76  * ndo_error() called on strdup(3) failure
77  */
78 
79 #define HASHNAMESIZE 4096
80 
81 struct hnamemem {
82 	uint32_t addr;
83 	const char *name;
84 	struct hnamemem *nxt;
85 };
86 
87 static struct hnamemem hnametable[HASHNAMESIZE];
88 static struct hnamemem tporttable[HASHNAMESIZE];
89 static struct hnamemem uporttable[HASHNAMESIZE];
90 static struct hnamemem eprototable[HASHNAMESIZE];
91 static struct hnamemem dnaddrtable[HASHNAMESIZE];
92 static struct hnamemem ipxsaptable[HASHNAMESIZE];
93 
94 #ifdef _WIN32
95 /*
96  * fake gethostbyaddr for Win2k/XP
97  * gethostbyaddr() returns incorrect value when AF_INET6 is passed
98  * to 3rd argument.
99  *
100  * h_name in struct hostent is only valid.
101  */
102 static struct hostent *
win32_gethostbyaddr(const char * addr,int len,int type)103 win32_gethostbyaddr(const char *addr, int len, int type)
104 {
105 	static struct hostent host;
106 	static char hostbuf[NI_MAXHOST];
107 	char hname[NI_MAXHOST];
108 	struct sockaddr_in6 addr6;
109 
110 	host.h_name = hostbuf;
111 	switch (type) {
112 	case AF_INET:
113 		return gethostbyaddr(addr, len, type);
114 		break;
115 	case AF_INET6:
116 		memset(&addr6, 0, sizeof(addr6));
117 		addr6.sin6_family = AF_INET6;
118 		memcpy(&addr6.sin6_addr, addr, len);
119 		if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
120 		    hname, sizeof(hname), NULL, 0, 0)) {
121 			return NULL;
122 		} else {
123 			strcpy(host.h_name, hname);
124 			return &host;
125 		}
126 		break;
127 	default:
128 		return NULL;
129 	}
130 }
131 #define gethostbyaddr win32_gethostbyaddr
132 #endif /* _WIN32 */
133 
134 struct h6namemem {
135 	struct in6_addr addr;
136 	char *name;
137 	struct h6namemem *nxt;
138 };
139 
140 static struct h6namemem h6nametable[HASHNAMESIZE];
141 
142 struct enamemem {
143 	u_short e_addr0;
144 	u_short e_addr1;
145 	u_short e_addr2;
146 	const char *e_name;
147 	u_char *e_nsap;			/* used only for nsaptable[] */
148 	struct enamemem *e_nxt;
149 };
150 
151 static struct enamemem enametable[HASHNAMESIZE];
152 static struct enamemem nsaptable[HASHNAMESIZE];
153 
154 struct bsnamemem {
155 	u_short bs_addr0;
156 	u_short bs_addr1;
157 	u_short bs_addr2;
158 	const char *bs_name;
159 	u_char *bs_bytes;
160 	unsigned int bs_nbytes;
161 	struct bsnamemem *bs_nxt;
162 };
163 
164 static struct bsnamemem bytestringtable[HASHNAMESIZE];
165 
166 struct protoidmem {
167 	uint32_t p_oui;
168 	u_short p_proto;
169 	const char *p_name;
170 	struct protoidmem *p_nxt;
171 };
172 
173 static struct protoidmem protoidtable[HASHNAMESIZE];
174 
175 /*
176  * A faster replacement for inet_ntoa().
177  */
178 const char *
intoa(uint32_t addr)179 intoa(uint32_t addr)
180 {
181 	register char *cp;
182 	register u_int byte;
183 	register int n;
184 	static char buf[sizeof(".xxx.xxx.xxx.xxx")];
185 
186 	NTOHL(addr);
187 	cp = buf + sizeof(buf);
188 	*--cp = '\0';
189 
190 	n = 4;
191 	do {
192 		byte = addr & 0xff;
193 		*--cp = byte % 10 + '0';
194 		byte /= 10;
195 		if (byte > 0) {
196 			*--cp = byte % 10 + '0';
197 			byte /= 10;
198 			if (byte > 0)
199 				*--cp = byte + '0';
200 		}
201 		*--cp = '.';
202 		addr >>= 8;
203 	} while (--n > 0);
204 
205 	return cp + 1;
206 }
207 
208 static uint32_t f_netmask;
209 static uint32_t f_localnet;
210 
211 /*
212  * Return a name for the IP address pointed to by ap.  This address
213  * is assumed to be in network byte order.
214  *
215  * NOTE: ap is *NOT* necessarily part of the packet data (not even if
216  * this is being called with the "ipaddr_string()" macro), so you
217  * *CANNOT* use the ND_TCHECK{2}/ND_TTEST{2} macros on it.  Furthermore,
218  * even in cases where it *is* part of the packet data, the caller
219  * would still have to check for a null return value, even if it's
220  * just printing the return value with "%s" - not all versions of
221  * printf print "(null)" with "%s" and a null pointer, some of them
222  * don't check for a null pointer and crash in that case.
223  *
224  * The callers of this routine should, before handing this routine
225  * a pointer to packet data, be sure that the data is present in
226  * the packet buffer.  They should probably do those checks anyway,
227  * as other data at that layer might not be IP addresses, and it
228  * also needs to check whether they're present in the packet buffer.
229  */
230 const char *
getname(netdissect_options * ndo,const u_char * ap)231 getname(netdissect_options *ndo, const u_char *ap)
232 {
233 	register struct hostent *hp;
234 	uint32_t addr;
235 	struct hnamemem *p;
236 
237 	memcpy(&addr, ap, sizeof(addr));
238 	p = &hnametable[addr & (HASHNAMESIZE-1)];
239 	for (; p->nxt; p = p->nxt) {
240 		if (p->addr == addr)
241 			return (p->name);
242 	}
243 	p->addr = addr;
244 	p->nxt = newhnamemem(ndo);
245 
246 	/*
247 	 * Print names unless:
248 	 *	(1) -n was given.
249 	 *      (2) Address is foreign and -f was given. (If -f was not
250 	 *	    given, f_netmask and f_localnet are 0 and the test
251 	 *	    evaluates to true)
252 	 */
253 	if (!ndo->ndo_nflag &&
254 	    (addr & f_netmask) == f_localnet) {
255 		hp = gethostbyaddr((char *)&addr, 4, AF_INET);
256 		if (hp) {
257 			char *dotp;
258 
259 			p->name = strdup(hp->h_name);
260 			if (p->name == NULL)
261 				(*ndo->ndo_error)(ndo,
262 						  "getname: strdup(hp->h_name)");
263 			if (ndo->ndo_Nflag) {
264 				/* Remove domain qualifications */
265 				dotp = strchr(p->name, '.');
266 				if (dotp)
267 					*dotp = '\0';
268 			}
269 			return (p->name);
270 		}
271 	}
272 	p->name = strdup(intoa(addr));
273 	if (p->name == NULL)
274 		(*ndo->ndo_error)(ndo, "getname: strdup(intoa(addr))");
275 	return (p->name);
276 }
277 
278 /*
279  * Return a name for the IP6 address pointed to by ap.  This address
280  * is assumed to be in network byte order.
281  */
282 const char *
getname6(netdissect_options * ndo,const u_char * ap)283 getname6(netdissect_options *ndo, const u_char *ap)
284 {
285 	register struct hostent *hp;
286 	union {
287 		struct in6_addr addr;
288 		struct for_hash_addr {
289 			char fill[14];
290 			uint16_t d;
291 		} addra;
292 	} addr;
293 	struct h6namemem *p;
294 	register const char *cp;
295 	char ntop_buf[INET6_ADDRSTRLEN];
296 
297 	memcpy(&addr, ap, sizeof(addr));
298 	p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)];
299 	for (; p->nxt; p = p->nxt) {
300 		if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
301 			return (p->name);
302 	}
303 	p->addr = addr.addr;
304 	p->nxt = newh6namemem(ndo);
305 
306 	/*
307 	 * Do not print names if -n was given.
308 	 */
309 	if (!ndo->ndo_nflag) {
310 		hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6);
311 		if (hp) {
312 			char *dotp;
313 
314 			p->name = strdup(hp->h_name);
315 			if (p->name == NULL)
316 				(*ndo->ndo_error)(ndo,
317 						  "getname6: strdup(hp->h_name)");
318 			if (ndo->ndo_Nflag) {
319 				/* Remove domain qualifications */
320 				dotp = strchr(p->name, '.');
321 				if (dotp)
322 					*dotp = '\0';
323 			}
324 			return (p->name);
325 		}
326 	}
327 	cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf));
328 	p->name = strdup(cp);
329 	if (p->name == NULL)
330 		(*ndo->ndo_error)(ndo, "getname6: strdup(cp)");
331 	return (p->name);
332 }
333 
334 static const char hex[16] = "0123456789abcdef";
335 
336 
337 /* Find the hash node that corresponds the ether address 'ep' */
338 
339 static inline struct enamemem *
lookup_emem(netdissect_options * ndo,const u_char * ep)340 lookup_emem(netdissect_options *ndo, const u_char *ep)
341 {
342 	register u_int i, j, k;
343 	struct enamemem *tp;
344 
345 	k = (ep[0] << 8) | ep[1];
346 	j = (ep[2] << 8) | ep[3];
347 	i = (ep[4] << 8) | ep[5];
348 
349 	tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
350 	while (tp->e_nxt)
351 		if (tp->e_addr0 == i &&
352 		    tp->e_addr1 == j &&
353 		    tp->e_addr2 == k)
354 			return tp;
355 		else
356 			tp = tp->e_nxt;
357 	tp->e_addr0 = i;
358 	tp->e_addr1 = j;
359 	tp->e_addr2 = k;
360 	tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
361 	if (tp->e_nxt == NULL)
362 		(*ndo->ndo_error)(ndo, "lookup_emem: calloc");
363 
364 	return tp;
365 }
366 
367 /*
368  * Find the hash node that corresponds to the bytestring 'bs'
369  * with length 'nlen'
370  */
371 
372 static inline struct bsnamemem *
lookup_bytestring(netdissect_options * ndo,register const u_char * bs,const unsigned int nlen)373 lookup_bytestring(netdissect_options *ndo, register const u_char *bs,
374 		  const unsigned int nlen)
375 {
376 	struct bsnamemem *tp;
377 	register u_int i, j, k;
378 
379 	if (nlen >= 6) {
380 		k = (bs[0] << 8) | bs[1];
381 		j = (bs[2] << 8) | bs[3];
382 		i = (bs[4] << 8) | bs[5];
383 	} else if (nlen >= 4) {
384 		k = (bs[0] << 8) | bs[1];
385 		j = (bs[2] << 8) | bs[3];
386 		i = 0;
387 	} else
388 		i = j = k = 0;
389 
390 	tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
391 	while (tp->bs_nxt)
392 		if (nlen == tp->bs_nbytes &&
393 		    tp->bs_addr0 == i &&
394 		    tp->bs_addr1 == j &&
395 		    tp->bs_addr2 == k &&
396 		    memcmp((const char *)bs, (const char *)(tp->bs_bytes), nlen) == 0)
397 			return tp;
398 		else
399 			tp = tp->bs_nxt;
400 
401 	tp->bs_addr0 = i;
402 	tp->bs_addr1 = j;
403 	tp->bs_addr2 = k;
404 
405 	tp->bs_bytes = (u_char *) calloc(1, nlen);
406 	if (tp->bs_bytes == NULL)
407 		(*ndo->ndo_error)(ndo, "lookup_bytestring: calloc");
408 
409 	memcpy(tp->bs_bytes, bs, nlen);
410 	tp->bs_nbytes = nlen;
411 	tp->bs_nxt = (struct bsnamemem *)calloc(1, sizeof(*tp));
412 	if (tp->bs_nxt == NULL)
413 		(*ndo->ndo_error)(ndo, "lookup_bytestring: calloc");
414 
415 	return tp;
416 }
417 
418 /* Find the hash node that corresponds the NSAP 'nsap' */
419 
420 static inline struct enamemem *
lookup_nsap(netdissect_options * ndo,register const u_char * nsap,register u_int nsap_length)421 lookup_nsap(netdissect_options *ndo, register const u_char *nsap,
422 	    register u_int nsap_length)
423 {
424 	register u_int i, j, k;
425 	struct enamemem *tp;
426 	const u_char *ensap;
427 
428 	if (nsap_length > 6) {
429 		ensap = nsap + nsap_length - 6;
430 		k = (ensap[0] << 8) | ensap[1];
431 		j = (ensap[2] << 8) | ensap[3];
432 		i = (ensap[4] << 8) | ensap[5];
433 	}
434 	else
435 		i = j = k = 0;
436 
437 	tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
438 	while (tp->e_nxt)
439 		if (nsap_length == tp->e_nsap[0] &&
440 		    tp->e_addr0 == i &&
441 		    tp->e_addr1 == j &&
442 		    tp->e_addr2 == k &&
443 		    memcmp((const char *)nsap,
444 			(char *)&(tp->e_nsap[1]), nsap_length) == 0)
445 			return tp;
446 		else
447 			tp = tp->e_nxt;
448 	tp->e_addr0 = i;
449 	tp->e_addr1 = j;
450 	tp->e_addr2 = k;
451 	tp->e_nsap = (u_char *)malloc(nsap_length + 1);
452 	if (tp->e_nsap == NULL)
453 		(*ndo->ndo_error)(ndo, "lookup_nsap: malloc");
454 	tp->e_nsap[0] = (u_char)nsap_length;	/* guaranteed < ISONSAP_MAX_LENGTH */
455 	memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length);
456 	tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
457 	if (tp->e_nxt == NULL)
458 		(*ndo->ndo_error)(ndo, "lookup_nsap: calloc");
459 
460 	return tp;
461 }
462 
463 /* Find the hash node that corresponds the protoid 'pi'. */
464 
465 static inline struct protoidmem *
lookup_protoid(netdissect_options * ndo,const u_char * pi)466 lookup_protoid(netdissect_options *ndo, const u_char *pi)
467 {
468 	register u_int i, j;
469 	struct protoidmem *tp;
470 
471 	/* 5 octets won't be aligned */
472 	i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
473 	j =   (pi[3] << 8) + pi[4];
474 	/* XXX should be endian-insensitive, but do big-endian testing  XXX */
475 
476 	tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
477 	while (tp->p_nxt)
478 		if (tp->p_oui == i && tp->p_proto == j)
479 			return tp;
480 		else
481 			tp = tp->p_nxt;
482 	tp->p_oui = i;
483 	tp->p_proto = j;
484 	tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
485 	if (tp->p_nxt == NULL)
486 		(*ndo->ndo_error)(ndo, "lookup_protoid: calloc");
487 
488 	return tp;
489 }
490 
491 const char *
etheraddr_string(netdissect_options * ndo,register const u_char * ep)492 etheraddr_string(netdissect_options *ndo, register const u_char *ep)
493 {
494 	register int i;
495 	register char *cp;
496 	register struct enamemem *tp;
497 	int oui;
498 	char buf[BUFSIZE];
499 
500 	tp = lookup_emem(ndo, ep);
501 	if (tp->e_name)
502 		return (tp->e_name);
503 #ifdef USE_ETHER_NTOHOST
504 	if (!ndo->ndo_nflag) {
505 		char buf2[BUFSIZE];
506 
507 		if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) {
508 			tp->e_name = strdup(buf2);
509 			if (tp->e_name == NULL)
510 				(*ndo->ndo_error)(ndo,
511 						  "etheraddr_string: strdup(buf2)");
512 			return (tp->e_name);
513 		}
514 	}
515 #endif
516 	cp = buf;
517 	oui = EXTRACT_24BITS(ep);
518 	*cp++ = hex[*ep >> 4 ];
519 	*cp++ = hex[*ep++ & 0xf];
520 	for (i = 5; --i >= 0;) {
521 		*cp++ = ':';
522 		*cp++ = hex[*ep >> 4 ];
523 		*cp++ = hex[*ep++ & 0xf];
524 	}
525 
526 	if (!ndo->ndo_nflag) {
527 		snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)",
528 		    tok2str(oui_values, "Unknown", oui));
529 	} else
530 		*cp = '\0';
531 	tp->e_name = strdup(buf);
532 	if (tp->e_name == NULL)
533 		(*ndo->ndo_error)(ndo, "etheraddr_string: strdup(buf)");
534 	return (tp->e_name);
535 }
536 
537 const char *
le64addr_string(netdissect_options * ndo,const u_char * ep)538 le64addr_string(netdissect_options *ndo, const u_char *ep)
539 {
540 	const unsigned int len = 8;
541 	register u_int i;
542 	register char *cp;
543 	register struct bsnamemem *tp;
544 	char buf[BUFSIZE];
545 
546 	tp = lookup_bytestring(ndo, ep, len);
547 	if (tp->bs_name)
548 		return (tp->bs_name);
549 
550 	cp = buf;
551 	for (i = len; i > 0 ; --i) {
552 		*cp++ = hex[*(ep + i - 1) >> 4];
553 		*cp++ = hex[*(ep + i - 1) & 0xf];
554 		*cp++ = ':';
555 	}
556 	cp --;
557 
558 	*cp = '\0';
559 
560 	tp->bs_name = strdup(buf);
561 	if (tp->bs_name == NULL)
562 		(*ndo->ndo_error)(ndo, "le64addr_string: strdup(buf)");
563 
564 	return (tp->bs_name);
565 }
566 
567 const char *
linkaddr_string(netdissect_options * ndo,const u_char * ep,const unsigned int type,const unsigned int len)568 linkaddr_string(netdissect_options *ndo, const u_char *ep,
569 		const unsigned int type, const unsigned int len)
570 {
571 	register u_int i;
572 	register char *cp;
573 	register struct bsnamemem *tp;
574 
575 	if (len == 0)
576 		return ("<empty>");
577 
578 	if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN)
579 		return (etheraddr_string(ndo, ep));
580 
581 	if (type == LINKADDR_FRELAY)
582 		return (q922_string(ndo, ep, len));
583 
584 	tp = lookup_bytestring(ndo, ep, len);
585 	if (tp->bs_name)
586 		return (tp->bs_name);
587 
588 	tp->bs_name = cp = (char *)malloc(len*3);
589 	if (tp->bs_name == NULL)
590 		(*ndo->ndo_error)(ndo, "linkaddr_string: malloc");
591 	*cp++ = hex[*ep >> 4];
592 	*cp++ = hex[*ep++ & 0xf];
593 	for (i = len-1; i > 0 ; --i) {
594 		*cp++ = ':';
595 		*cp++ = hex[*ep >> 4];
596 		*cp++ = hex[*ep++ & 0xf];
597 	}
598 	*cp = '\0';
599 	return (tp->bs_name);
600 }
601 
602 const char *
etherproto_string(netdissect_options * ndo,u_short port)603 etherproto_string(netdissect_options *ndo, u_short port)
604 {
605 	register char *cp;
606 	register struct hnamemem *tp;
607 	register uint32_t i = port;
608 	char buf[sizeof("0000")];
609 
610 	for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
611 		if (tp->addr == i)
612 			return (tp->name);
613 
614 	tp->addr = i;
615 	tp->nxt = newhnamemem(ndo);
616 
617 	cp = buf;
618 	NTOHS(port);
619 	*cp++ = hex[port >> 12 & 0xf];
620 	*cp++ = hex[port >> 8 & 0xf];
621 	*cp++ = hex[port >> 4 & 0xf];
622 	*cp++ = hex[port & 0xf];
623 	*cp++ = '\0';
624 	tp->name = strdup(buf);
625 	if (tp->name == NULL)
626 		(*ndo->ndo_error)(ndo, "etherproto_string: strdup(buf)");
627 	return (tp->name);
628 }
629 
630 const char *
protoid_string(netdissect_options * ndo,register const u_char * pi)631 protoid_string(netdissect_options *ndo, register const u_char *pi)
632 {
633 	register u_int i, j;
634 	register char *cp;
635 	register struct protoidmem *tp;
636 	char buf[sizeof("00:00:00:00:00")];
637 
638 	tp = lookup_protoid(ndo, pi);
639 	if (tp->p_name)
640 		return tp->p_name;
641 
642 	cp = buf;
643 	if ((j = *pi >> 4) != 0)
644 		*cp++ = hex[j];
645 	*cp++ = hex[*pi++ & 0xf];
646 	for (i = 4; (int)--i >= 0;) {
647 		*cp++ = ':';
648 		if ((j = *pi >> 4) != 0)
649 			*cp++ = hex[j];
650 		*cp++ = hex[*pi++ & 0xf];
651 	}
652 	*cp = '\0';
653 	tp->p_name = strdup(buf);
654 	if (tp->p_name == NULL)
655 		(*ndo->ndo_error)(ndo, "protoid_string: strdup(buf)");
656 	return (tp->p_name);
657 }
658 
659 #define ISONSAP_MAX_LENGTH 20
660 const char *
isonsap_string(netdissect_options * ndo,const u_char * nsap,register u_int nsap_length)661 isonsap_string(netdissect_options *ndo, const u_char *nsap,
662 	       register u_int nsap_length)
663 {
664 	register u_int nsap_idx;
665 	register char *cp;
666 	register struct enamemem *tp;
667 
668 	if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH)
669 		return ("isonsap_string: illegal length");
670 
671 	tp = lookup_nsap(ndo, nsap, nsap_length);
672 	if (tp->e_name)
673 		return tp->e_name;
674 
675 	tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx"));
676 	if (cp == NULL)
677 		(*ndo->ndo_error)(ndo, "isonsap_string: malloc");
678 
679 	for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
680 		*cp++ = hex[*nsap >> 4];
681 		*cp++ = hex[*nsap++ & 0xf];
682 		if (((nsap_idx & 1) == 0) &&
683 		     (nsap_idx + 1 < nsap_length)) {
684 		     	*cp++ = '.';
685 		}
686 	}
687 	*cp = '\0';
688 	return (tp->e_name);
689 }
690 
691 const char *
tcpport_string(netdissect_options * ndo,u_short port)692 tcpport_string(netdissect_options *ndo, u_short port)
693 {
694 	register struct hnamemem *tp;
695 	register uint32_t i = port;
696 	char buf[sizeof("00000")];
697 
698 	for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
699 		if (tp->addr == i)
700 			return (tp->name);
701 
702 	tp->addr = i;
703 	tp->nxt = newhnamemem(ndo);
704 
705 	(void)snprintf(buf, sizeof(buf), "%u", i);
706 	tp->name = strdup(buf);
707 	if (tp->name == NULL)
708 		(*ndo->ndo_error)(ndo, "tcpport_string: strdup(buf)");
709 	return (tp->name);
710 }
711 
712 const char *
udpport_string(netdissect_options * ndo,register u_short port)713 udpport_string(netdissect_options *ndo, register u_short port)
714 {
715 	register struct hnamemem *tp;
716 	register uint32_t i = port;
717 	char buf[sizeof("00000")];
718 
719 	for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
720 		if (tp->addr == i)
721 			return (tp->name);
722 
723 	tp->addr = i;
724 	tp->nxt = newhnamemem(ndo);
725 
726 	(void)snprintf(buf, sizeof(buf), "%u", i);
727 	tp->name = strdup(buf);
728 	if (tp->name == NULL)
729 		(*ndo->ndo_error)(ndo, "udpport_string: strdup(buf)");
730 	return (tp->name);
731 }
732 
733 const char *
ipxsap_string(netdissect_options * ndo,u_short port)734 ipxsap_string(netdissect_options *ndo, u_short port)
735 {
736 	register char *cp;
737 	register struct hnamemem *tp;
738 	register uint32_t i = port;
739 	char buf[sizeof("0000")];
740 
741 	for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
742 		if (tp->addr == i)
743 			return (tp->name);
744 
745 	tp->addr = i;
746 	tp->nxt = newhnamemem(ndo);
747 
748 	cp = buf;
749 	NTOHS(port);
750 	*cp++ = hex[port >> 12 & 0xf];
751 	*cp++ = hex[port >> 8 & 0xf];
752 	*cp++ = hex[port >> 4 & 0xf];
753 	*cp++ = hex[port & 0xf];
754 	*cp++ = '\0';
755 	tp->name = strdup(buf);
756 	if (tp->name == NULL)
757 		(*ndo->ndo_error)(ndo, "ipxsap_string: strdup(buf)");
758 	return (tp->name);
759 }
760 
761 static void
init_servarray(netdissect_options * ndo)762 init_servarray(netdissect_options *ndo)
763 {
764 	struct servent *sv;
765 	register struct hnamemem *table;
766 	register int i;
767 	char buf[sizeof("0000000000")];
768 
769 	while ((sv = getservent()) != NULL) {
770 		int port = ntohs(sv->s_port);
771 		i = port & (HASHNAMESIZE-1);
772 		if (strcmp(sv->s_proto, "tcp") == 0)
773 			table = &tporttable[i];
774 		else if (strcmp(sv->s_proto, "udp") == 0)
775 			table = &uporttable[i];
776 		else
777 			continue;
778 
779 		while (table->name)
780 			table = table->nxt;
781 		if (ndo->ndo_nflag) {
782 			(void)snprintf(buf, sizeof(buf), "%d", port);
783 			table->name = strdup(buf);
784 		} else
785 			table->name = strdup(sv->s_name);
786 		if (table->name == NULL)
787 			(*ndo->ndo_error)(ndo, "init_servarray: strdup");
788 
789 		table->addr = port;
790 		table->nxt = newhnamemem(ndo);
791 	}
792 	endservent();
793 }
794 
795 static const struct eproto {
796 	const char *s;
797 	u_short p;
798 } eproto_db[] = {
799 	{ "pup", ETHERTYPE_PUP },
800 	{ "xns", ETHERTYPE_NS },
801 	{ "ip", ETHERTYPE_IP },
802 	{ "ip6", ETHERTYPE_IPV6 },
803 	{ "arp", ETHERTYPE_ARP },
804 	{ "rarp", ETHERTYPE_REVARP },
805 	{ "sprite", ETHERTYPE_SPRITE },
806 	{ "mopdl", ETHERTYPE_MOPDL },
807 	{ "moprc", ETHERTYPE_MOPRC },
808 	{ "decnet", ETHERTYPE_DN },
809 	{ "lat", ETHERTYPE_LAT },
810 	{ "sca", ETHERTYPE_SCA },
811 	{ "lanbridge", ETHERTYPE_LANBRIDGE },
812 	{ "vexp", ETHERTYPE_VEXP },
813 	{ "vprod", ETHERTYPE_VPROD },
814 	{ "atalk", ETHERTYPE_ATALK },
815 	{ "atalkarp", ETHERTYPE_AARP },
816 	{ "loopback", ETHERTYPE_LOOPBACK },
817 	{ "decdts", ETHERTYPE_DECDTS },
818 	{ "decdns", ETHERTYPE_DECDNS },
819 	{ (char *)0, 0 }
820 };
821 
822 static void
init_eprotoarray(netdissect_options * ndo)823 init_eprotoarray(netdissect_options *ndo)
824 {
825 	register int i;
826 	register struct hnamemem *table;
827 
828 	for (i = 0; eproto_db[i].s; i++) {
829 		int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
830 		table = &eprototable[j];
831 		while (table->name)
832 			table = table->nxt;
833 		table->name = eproto_db[i].s;
834 		table->addr = htons(eproto_db[i].p);
835 		table->nxt = newhnamemem(ndo);
836 	}
837 }
838 
839 static const struct protoidlist {
840 	const u_char protoid[5];
841 	const char *name;
842 } protoidlist[] = {
843 	{{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
844 	{{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
845 	{{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
846 	{{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
847 	{{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
848 	{{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
849 };
850 
851 /*
852  * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
853  * types.
854  */
855 static void
init_protoidarray(netdissect_options * ndo)856 init_protoidarray(netdissect_options *ndo)
857 {
858 	register int i;
859 	register struct protoidmem *tp;
860 	const struct protoidlist *pl;
861 	u_char protoid[5];
862 
863 	protoid[0] = 0;
864 	protoid[1] = 0;
865 	protoid[2] = 0;
866 	for (i = 0; eproto_db[i].s; i++) {
867 		u_short etype = htons(eproto_db[i].p);
868 
869 		memcpy((char *)&protoid[3], (char *)&etype, 2);
870 		tp = lookup_protoid(ndo, protoid);
871 		tp->p_name = strdup(eproto_db[i].s);
872 		if (tp->p_name == NULL)
873 			(*ndo->ndo_error)(ndo,
874 					  "init_protoidarray: strdup(eproto_db[i].s)");
875 	}
876 	/* Hardwire some SNAP proto ID names */
877 	for (pl = protoidlist; pl->name != NULL; ++pl) {
878 		tp = lookup_protoid(ndo, pl->protoid);
879 		/* Don't override existing name */
880 		if (tp->p_name != NULL)
881 			continue;
882 
883 		tp->p_name = pl->name;
884 	}
885 }
886 
887 static const struct etherlist {
888 	const u_char addr[6];
889 	const char *name;
890 } etherlist[] = {
891 	{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
892 	{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
893 };
894 
895 /*
896  * Initialize the ethers hash table.  We take two different approaches
897  * depending on whether or not the system provides the ethers name
898  * service.  If it does, we just wire in a few names at startup,
899  * and etheraddr_string() fills in the table on demand.  If it doesn't,
900  * then we suck in the entire /etc/ethers file at startup.  The idea
901  * is that parsing the local file will be fast, but spinning through
902  * all the ethers entries via NIS & next_etherent might be very slow.
903  *
904  * XXX pcap_next_etherent doesn't belong in the pcap interface, but
905  * since the pcap module already does name-to-address translation,
906  * it's already does most of the work for the ethernet address-to-name
907  * translation, so we just pcap_next_etherent as a convenience.
908  */
909 static void
init_etherarray(netdissect_options * ndo)910 init_etherarray(netdissect_options *ndo)
911 {
912 	register const struct etherlist *el;
913 	register struct enamemem *tp;
914 #ifdef USE_ETHER_NTOHOST
915 	char name[256];
916 #else
917 	register struct pcap_etherent *ep;
918 	register FILE *fp;
919 
920 	/* Suck in entire ethers file */
921 	fp = fopen(PCAP_ETHERS_FILE, "r");
922 	if (fp != NULL) {
923 		while ((ep = pcap_next_etherent(fp)) != NULL) {
924 			tp = lookup_emem(ndo, ep->addr);
925 			tp->e_name = strdup(ep->name);
926 			if (tp->e_name == NULL)
927 				(*ndo->ndo_error)(ndo,
928 						  "init_etherarray: strdup(ep->addr)");
929 		}
930 		(void)fclose(fp);
931 	}
932 #endif
933 
934 	/* Hardwire some ethernet names */
935 	for (el = etherlist; el->name != NULL; ++el) {
936 		tp = lookup_emem(ndo, el->addr);
937 		/* Don't override existing name */
938 		if (tp->e_name != NULL)
939 			continue;
940 
941 #ifdef USE_ETHER_NTOHOST
942 		/*
943 		 * Use YP/NIS version of name if available.
944 		 */
945 		if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) {
946 			tp->e_name = strdup(name);
947 			if (tp->e_name == NULL)
948 				(*ndo->ndo_error)(ndo,
949 						  "init_etherarray: strdup(name)");
950 			continue;
951 		}
952 #endif
953 		tp->e_name = el->name;
954 	}
955 }
956 
957 static const struct tok ipxsap_db[] = {
958 	{ 0x0000, "Unknown" },
959 	{ 0x0001, "User" },
960 	{ 0x0002, "User Group" },
961 	{ 0x0003, "PrintQueue" },
962 	{ 0x0004, "FileServer" },
963 	{ 0x0005, "JobServer" },
964 	{ 0x0006, "Gateway" },
965 	{ 0x0007, "PrintServer" },
966 	{ 0x0008, "ArchiveQueue" },
967 	{ 0x0009, "ArchiveServer" },
968 	{ 0x000a, "JobQueue" },
969 	{ 0x000b, "Administration" },
970 	{ 0x000F, "Novell TI-RPC" },
971 	{ 0x0017, "Diagnostics" },
972 	{ 0x0020, "NetBIOS" },
973 	{ 0x0021, "NAS SNA Gateway" },
974 	{ 0x0023, "NACS AsyncGateway" },
975 	{ 0x0024, "RemoteBridge/RoutingService" },
976 	{ 0x0026, "BridgeServer" },
977 	{ 0x0027, "TCP/IP Gateway" },
978 	{ 0x0028, "Point-to-point X.25 BridgeServer" },
979 	{ 0x0029, "3270 Gateway" },
980 	{ 0x002a, "CHI Corp" },
981 	{ 0x002c, "PC Chalkboard" },
982 	{ 0x002d, "TimeSynchServer" },
983 	{ 0x002e, "ARCserve5.0/PalindromeBackup" },
984 	{ 0x0045, "DI3270 Gateway" },
985 	{ 0x0047, "AdvertisingPrintServer" },
986 	{ 0x004a, "NetBlazerModems" },
987 	{ 0x004b, "BtrieveVAP" },
988 	{ 0x004c, "NetwareSQL" },
989 	{ 0x004d, "XtreeNetwork" },
990 	{ 0x0050, "BtrieveVAP4.11" },
991 	{ 0x0052, "QuickLink" },
992 	{ 0x0053, "PrintQueueUser" },
993 	{ 0x0058, "Multipoint X.25 Router" },
994 	{ 0x0060, "STLB/NLM" },
995 	{ 0x0064, "ARCserve" },
996 	{ 0x0066, "ARCserve3.0" },
997 	{ 0x0072, "WAN CopyUtility" },
998 	{ 0x007a, "TES-NetwareVMS" },
999 	{ 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
1000 	{ 0x0095, "DDA OBGYN" },
1001 	{ 0x0098, "NetwareAccessServer" },
1002 	{ 0x009a, "Netware for VMS II/NamedPipeServer" },
1003 	{ 0x009b, "NetwareAccessServer" },
1004 	{ 0x009e, "PortableNetwareServer/SunLinkNVT" },
1005 	{ 0x00a1, "PowerchuteAPC UPS" },
1006 	{ 0x00aa, "LAWserve" },
1007 	{ 0x00ac, "CompaqIDA StatusMonitor" },
1008 	{ 0x0100, "PIPE STAIL" },
1009 	{ 0x0102, "LAN ProtectBindery" },
1010 	{ 0x0103, "OracleDataBaseServer" },
1011 	{ 0x0107, "Netware386/RSPX RemoteConsole" },
1012 	{ 0x010f, "NovellSNA Gateway" },
1013 	{ 0x0111, "TestServer" },
1014 	{ 0x0112, "HP PrintServer" },
1015 	{ 0x0114, "CSA MUX" },
1016 	{ 0x0115, "CSA LCA" },
1017 	{ 0x0116, "CSA CM" },
1018 	{ 0x0117, "CSA SMA" },
1019 	{ 0x0118, "CSA DBA" },
1020 	{ 0x0119, "CSA NMA" },
1021 	{ 0x011a, "CSA SSA" },
1022 	{ 0x011b, "CSA STATUS" },
1023 	{ 0x011e, "CSA APPC" },
1024 	{ 0x0126, "SNA TEST SSA Profile" },
1025 	{ 0x012a, "CSA TRACE" },
1026 	{ 0x012b, "NetwareSAA" },
1027 	{ 0x012e, "IKARUS VirusScan" },
1028 	{ 0x0130, "CommunicationsExecutive" },
1029 	{ 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
1030 	{ 0x0135, "NetwareNamingServicesProfile" },
1031 	{ 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
1032 	{ 0x0141, "LAN SpoolServer" },
1033 	{ 0x0152, "IRMALAN Gateway" },
1034 	{ 0x0154, "NamedPipeServer" },
1035 	{ 0x0166, "NetWareManagement" },
1036 	{ 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
1037 	{ 0x0173, "Compaq" },
1038 	{ 0x0174, "Compaq SNMP Agent" },
1039 	{ 0x0175, "Compaq" },
1040 	{ 0x0180, "XTreeServer/XTreeTools" },
1041 	{ 0x018A, "NASI ServicesBroadcastServer" },
1042 	{ 0x01b0, "GARP Gateway" },
1043 	{ 0x01b1, "Binfview" },
1044 	{ 0x01bf, "IntelLanDeskManager" },
1045 	{ 0x01ca, "AXTEC" },
1046 	{ 0x01cb, "ShivaNetModem/E" },
1047 	{ 0x01cc, "ShivaLanRover/E" },
1048 	{ 0x01cd, "ShivaLanRover/T" },
1049 	{ 0x01ce, "ShivaUniversal" },
1050 	{ 0x01d8, "CastelleFAXPressServer" },
1051 	{ 0x01da, "CastelleLANPressPrintServer" },
1052 	{ 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
1053 	{ 0x01f0, "LEGATO" },
1054 	{ 0x01f5, "LEGATO" },
1055 	{ 0x0233, "NMS Agent/NetwareManagementAgent" },
1056 	{ 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
1057 	{ 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
1058 	{ 0x023a, "LANtern" },
1059 	{ 0x023c, "MAVERICK" },
1060 	{ 0x023f, "NovellSMDR" },
1061 	{ 0x024e, "NetwareConnect" },
1062 	{ 0x024f, "NASI ServerBroadcast Cisco" },
1063 	{ 0x026a, "NMS ServiceConsole" },
1064 	{ 0x026b, "TimeSynchronizationServer Netware 4.x" },
1065 	{ 0x0278, "DirectoryServer Netware 4.x" },
1066 	{ 0x027b, "NetwareManagementAgent" },
1067 	{ 0x0280, "Novell File and Printer Sharing Service for PC" },
1068 	{ 0x0304, "NovellSAA Gateway" },
1069 	{ 0x0308, "COM/VERMED" },
1070 	{ 0x030a, "GalacticommWorldgroupServer" },
1071 	{ 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
1072 	{ 0x0320, "AttachmateGateway" },
1073 	{ 0x0327, "MicrosoftDiagnostiocs" },
1074 	{ 0x0328, "WATCOM SQL Server" },
1075 	{ 0x0335, "MultiTechSystems MultisynchCommServer" },
1076 	{ 0x0343, "Xylogics RemoteAccessServer/LANModem" },
1077 	{ 0x0355, "ArcadaBackupExec" },
1078 	{ 0x0358, "MSLCD1" },
1079 	{ 0x0361, "NETINELO" },
1080 	{ 0x037e, "Powerchute UPS Monitoring" },
1081 	{ 0x037f, "ViruSafeNotify" },
1082 	{ 0x0386, "HP Bridge" },
1083 	{ 0x0387, "HP Hub" },
1084 	{ 0x0394, "NetWare SAA Gateway" },
1085 	{ 0x039b, "LotusNotes" },
1086 	{ 0x03b7, "CertusAntiVirus" },
1087 	{ 0x03c4, "ARCserve4.0" },
1088 	{ 0x03c7, "LANspool3.5" },
1089 	{ 0x03d7, "LexmarkPrinterServer" },
1090 	{ 0x03d8, "LexmarkXLE PrinterServer" },
1091 	{ 0x03dd, "BanyanENS NetwareClient" },
1092 	{ 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
1093 	{ 0x03e1, "UnivelUnixware" },
1094 	{ 0x03e4, "UnivelUnixware" },
1095 	{ 0x03fc, "IntelNetport" },
1096 	{ 0x03fd, "PrintServerQueue" },
1097 	{ 0x040A, "ipnServer" },
1098 	{ 0x040D, "LVERRMAN" },
1099 	{ 0x040E, "LVLIC" },
1100 	{ 0x0414, "NET Silicon (DPI)/Kyocera" },
1101 	{ 0x0429, "SiteLockVirus" },
1102 	{ 0x0432, "UFHELPR???" },
1103 	{ 0x0433, "Synoptics281xAdvancedSNMPAgent" },
1104 	{ 0x0444, "MicrosoftNT SNA Server" },
1105 	{ 0x0448, "Oracle" },
1106 	{ 0x044c, "ARCserve5.01" },
1107 	{ 0x0457, "CanonGP55" },
1108 	{ 0x045a, "QMS Printers" },
1109 	{ 0x045b, "DellSCSI Array" },
1110 	{ 0x0491, "NetBlazerModems" },
1111 	{ 0x04ac, "OnTimeScheduler" },
1112 	{ 0x04b0, "CD-Net" },
1113 	{ 0x0513, "EmulexNQA" },
1114 	{ 0x0520, "SiteLockChecks" },
1115 	{ 0x0529, "SiteLockChecks" },
1116 	{ 0x052d, "CitrixOS2 AppServer" },
1117 	{ 0x0535, "Tektronix" },
1118 	{ 0x0536, "Milan" },
1119 	{ 0x055d, "Attachmate SNA gateway" },
1120 	{ 0x056b, "IBM8235 ModemServer" },
1121 	{ 0x056c, "ShivaLanRover/E PLUS" },
1122 	{ 0x056d, "ShivaLanRover/T PLUS" },
1123 	{ 0x0580, "McAfeeNetShield" },
1124 	{ 0x05B8, "NLM to workstation communication (Revelation Software)" },
1125 	{ 0x05BA, "CompatibleSystemsRouters" },
1126 	{ 0x05BE, "CheyenneHierarchicalStorageManager" },
1127 	{ 0x0606, "JCWatermarkImaging" },
1128 	{ 0x060c, "AXISNetworkPrinter" },
1129 	{ 0x0610, "AdaptecSCSIManagement" },
1130 	{ 0x0621, "IBM AntiVirus" },
1131 	{ 0x0640, "Windows95 RemoteRegistryService" },
1132 	{ 0x064e, "MicrosoftIIS" },
1133 	{ 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1134 	{ 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1135 	{ 0x076C, "Xerox" },
1136 	{ 0x079b, "ShivaLanRover/E 115" },
1137 	{ 0x079c, "ShivaLanRover/T 115" },
1138 	{ 0x07B4, "CubixWorldDesk" },
1139 	{ 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
1140 	{ 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
1141 	{ 0x0810, "ELAN License Server Demo" },
1142 	{ 0x0824, "ShivaLanRoverAccessSwitch/E" },
1143 	{ 0x086a, "ISSC Collector" },
1144 	{ 0x087f, "ISSC DAS AgentAIX" },
1145 	{ 0x0880, "Intel Netport PRO" },
1146 	{ 0x0881, "Intel Netport PRO" },
1147 	{ 0x0b29, "SiteLock" },
1148 	{ 0x0c29, "SiteLockApplications" },
1149 	{ 0x0c2c, "LicensingServer" },
1150 	{ 0x2101, "PerformanceTechnologyInstantInternet" },
1151 	{ 0x2380, "LAI SiteLock" },
1152 	{ 0x238c, "MeetingMaker" },
1153 	{ 0x4808, "SiteLockServer/SiteLockMetering" },
1154 	{ 0x5555, "SiteLockUser" },
1155 	{ 0x6312, "Tapeware" },
1156 	{ 0x6f00, "RabbitGateway" },
1157 	{ 0x7703, "MODEM" },
1158 	{ 0x8002, "NetPortPrinters" },
1159 	{ 0x8008, "WordPerfectNetworkVersion" },
1160 	{ 0x85BE, "Cisco EIGRP" },
1161 	{ 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
1162 	{ 0x9000, "McAfeeNetShield" },
1163 	{ 0x9604, "CSA-NT_MON" },
1164 	{ 0xb6a8, "OceanIsleReachoutRemoteControl" },
1165 	{ 0xf11f, "SiteLockMetering" },
1166 	{ 0xf1ff, "SiteLock" },
1167 	{ 0xf503, "Microsoft SQL Server" },
1168 	{ 0xF905, "IBM TimeAndPlace" },
1169 	{ 0xfbfb, "TopCallIII FaxServer" },
1170 	{ 0xffff, "AnyService/Wildcard" },
1171 	{ 0, (char *)0 }
1172 };
1173 
1174 static void
init_ipxsaparray(netdissect_options * ndo)1175 init_ipxsaparray(netdissect_options *ndo)
1176 {
1177 	register int i;
1178 	register struct hnamemem *table;
1179 
1180 	for (i = 0; ipxsap_db[i].s != NULL; i++) {
1181 		int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
1182 		table = &ipxsaptable[j];
1183 		while (table->name)
1184 			table = table->nxt;
1185 		table->name = ipxsap_db[i].s;
1186 		table->addr = htons(ipxsap_db[i].v);
1187 		table->nxt = newhnamemem(ndo);
1188 	}
1189 }
1190 
1191 /*
1192  * Initialize the address to name translation machinery.  We map all
1193  * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true
1194  * (i.e., to prevent blocking on the nameserver).  localnet is the IP address
1195  * of the local network.  mask is its subnet mask.
1196  */
1197 void
init_addrtoname(netdissect_options * ndo,uint32_t localnet,uint32_t mask)1198 init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask)
1199 {
1200 	if (ndo->ndo_fflag) {
1201 		f_localnet = localnet;
1202 		f_netmask = mask;
1203 	}
1204 	if (ndo->ndo_nflag)
1205 		/*
1206 		 * Simplest way to suppress names.
1207 		 */
1208 		return;
1209 
1210 	init_etherarray(ndo);
1211 	init_servarray(ndo);
1212 	init_eprotoarray(ndo);
1213 	init_protoidarray(ndo);
1214 	init_ipxsaparray(ndo);
1215 }
1216 
1217 const char *
dnaddr_string(netdissect_options * ndo,u_short dnaddr)1218 dnaddr_string(netdissect_options *ndo, u_short dnaddr)
1219 {
1220 	register struct hnamemem *tp;
1221 
1222 	for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL;
1223 	     tp = tp->nxt)
1224 		if (tp->addr == dnaddr)
1225 			return (tp->name);
1226 
1227 	tp->addr = dnaddr;
1228 	tp->nxt = newhnamemem(ndo);
1229 	if (ndo->ndo_nflag)
1230 		tp->name = dnnum_string(ndo, dnaddr);
1231 	else
1232 		tp->name = dnname_string(ndo, dnaddr);
1233 
1234 	return(tp->name);
1235 }
1236 
1237 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
1238 struct hnamemem *
newhnamemem(netdissect_options * ndo)1239 newhnamemem(netdissect_options *ndo)
1240 {
1241 	register struct hnamemem *p;
1242 	static struct hnamemem *ptr = NULL;
1243 	static u_int num = 0;
1244 
1245 	if (num  <= 0) {
1246 		num = 64;
1247 		ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
1248 		if (ptr == NULL)
1249 			(*ndo->ndo_error)(ndo, "newhnamemem: calloc");
1250 	}
1251 	--num;
1252 	p = ptr++;
1253 	return (p);
1254 }
1255 
1256 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
1257 struct h6namemem *
newh6namemem(netdissect_options * ndo)1258 newh6namemem(netdissect_options *ndo)
1259 {
1260 	register struct h6namemem *p;
1261 	static struct h6namemem *ptr = NULL;
1262 	static u_int num = 0;
1263 
1264 	if (num  <= 0) {
1265 		num = 64;
1266 		ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
1267 		if (ptr == NULL)
1268 			(*ndo->ndo_error)(ndo, "newh6namemem: calloc");
1269 	}
1270 	--num;
1271 	p = ptr++;
1272 	return (p);
1273 }
1274 
1275 /* Represent TCI part of the 802.1Q 4-octet tag as text. */
1276 const char *
ieee8021q_tci_string(const uint16_t tci)1277 ieee8021q_tci_string(const uint16_t tci)
1278 {
1279 	static char buf[128];
1280 	snprintf(buf, sizeof(buf), "vlan %u, p %u%s",
1281 	         tci & 0xfff,
1282 	         tci >> 13,
1283 	         (tci & 0x1000) ? ", DEI" : "");
1284 	return buf;
1285 }
1286