1 /*
2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Internet, ethernet, port, and protocol string to address
22 * and address to string conversion routines
23 */
24
25 #ifdef HAVE_CONFIG_H
26 #include <config.h>
27 #endif
28
29 #ifdef HAVE_CASPER
30 #include <libcasper.h>
31 #include <casper/cap_dns.h>
32 #endif /* HAVE_CASPER */
33
34 #include "netdissect-stdinc.h"
35
36 #ifdef USE_ETHER_NTOHOST
37 #if defined(NET_ETHERNET_H_DECLARES_ETHER_NTOHOST)
38 /*
39 * OK, just include <net/ethernet.h>.
40 */
41 #include <net/ethernet.h>
42 #elif defined(NETINET_ETHER_H_DECLARES_ETHER_NTOHOST)
43 /*
44 * OK, just include <netinet/ether.h>
45 */
46 #include <netinet/ether.h>
47 #elif defined(SYS_ETHERNET_H_DECLARES_ETHER_NTOHOST)
48 /*
49 * OK, just include <sys/ethernet.h>
50 */
51 #include <sys/ethernet.h>
52 #elif defined(ARPA_INET_H_DECLARES_ETHER_NTOHOST)
53 /*
54 * OK, just include <arpa/inet.h>
55 */
56 #include <arpa/inet.h>
57 #elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_NTOHOST)
58 /*
59 * OK, include <netinet/if_ether.h>, after all the other stuff we
60 * need to include or define for its benefit.
61 */
62 #define NEED_NETINET_IF_ETHER_H
63 #else
64 /*
65 * We'll have to declare it ourselves.
66 * If <netinet/if_ether.h> defines struct ether_addr, include
67 * it. Otherwise, define it ourselves.
68 */
69 #ifdef HAVE_STRUCT_ETHER_ADDR
70 #define NEED_NETINET_IF_ETHER_H
71 #else /* HAVE_STRUCT_ETHER_ADDR */
72 struct ether_addr {
73 /* Beware FreeBSD calls this "octet". */
74 unsigned char ether_addr_octet[MAC_ADDR_LEN];
75 };
76 #endif /* HAVE_STRUCT_ETHER_ADDR */
77 #endif /* what declares ether_ntohost() */
78
79 #ifdef NEED_NETINET_IF_ETHER_H
80 /*
81 * Include diag-control.h before <net/if.h>, which too defines a macro
82 * named ND_UNREACHABLE.
83 */
84 #include "diag-control.h"
85 #include <net/if.h> /* Needed on some platforms */
86 #include <netinet/in.h> /* Needed on some platforms */
87 #include <netinet/if_ether.h>
88 #endif /* NEED_NETINET_IF_ETHER_H */
89
90 #ifndef HAVE_DECL_ETHER_NTOHOST
91 /*
92 * No header declares it, so declare it ourselves.
93 */
94 extern int ether_ntohost(char *, const struct ether_addr *);
95 #endif /* !defined(HAVE_DECL_ETHER_NTOHOST) */
96 #endif /* USE_ETHER_NTOHOST */
97
98 #include <pcap.h>
99 #include <pcap-namedb.h>
100 #ifndef HAVE_GETSERVENT
101 #include <getservent.h>
102 #endif
103 #include <signal.h>
104 #include <stdio.h>
105 #include <string.h>
106 #include <stdlib.h>
107
108 #include "netdissect.h"
109 #include "addrtoname.h"
110 #include "addrtostr.h"
111 #include "ethertype.h"
112 #include "llc.h"
113 #include "extract.h"
114 #include "oui.h"
115
116 /*
117 * hash tables for whatever-to-name translations
118 *
119 * ndo_error() called on strdup(3) failure with S_ERR_ND_MEM_ALLOC status
120 */
121
122 #define HASHNAMESIZE 4096
123
124 struct hnamemem {
125 uint32_t addr;
126 const char *name;
127 struct hnamemem *nxt;
128 };
129
130 static struct hnamemem hnametable[HASHNAMESIZE];
131 static struct hnamemem tporttable[HASHNAMESIZE];
132 static struct hnamemem uporttable[HASHNAMESIZE];
133 static struct hnamemem eprototable[HASHNAMESIZE];
134 static struct hnamemem dnaddrtable[HASHNAMESIZE];
135 static struct hnamemem ipxsaptable[HASHNAMESIZE];
136
137 #ifdef _WIN32
138 /*
139 * fake gethostbyaddr for Win2k/XP
140 * gethostbyaddr() returns incorrect value when AF_INET6 is passed
141 * to 3rd argument.
142 *
143 * h_name in struct hostent is only valid.
144 */
145 static struct hostent *
win32_gethostbyaddr(const char * addr,int len,int type)146 win32_gethostbyaddr(const char *addr, int len, int type)
147 {
148 static struct hostent host;
149 static char hostbuf[NI_MAXHOST];
150 char hname[NI_MAXHOST];
151 struct sockaddr_in6 addr6;
152
153 host.h_name = hostbuf;
154 switch (type) {
155 case AF_INET:
156 return gethostbyaddr(addr, len, type);
157 break;
158 case AF_INET6:
159 memset(&addr6, 0, sizeof(addr6));
160 addr6.sin6_family = AF_INET6;
161 memcpy(&addr6.sin6_addr, addr, len);
162 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
163 hname, sizeof(hname), NULL, 0, 0)) {
164 return NULL;
165 } else {
166 strlcpy(host.h_name, hname, NI_MAXHOST);
167 return &host;
168 }
169 break;
170 default:
171 return NULL;
172 }
173 }
174 #define gethostbyaddr win32_gethostbyaddr
175 #endif /* _WIN32 */
176
177 struct h6namemem {
178 nd_ipv6 addr;
179 char *name;
180 struct h6namemem *nxt;
181 };
182
183 static struct h6namemem h6nametable[HASHNAMESIZE];
184
185 struct enamemem {
186 u_short e_addr0;
187 u_short e_addr1;
188 u_short e_addr2;
189 const char *e_name;
190 u_char *e_nsap; /* used only for nsaptable[] */
191 struct enamemem *e_nxt;
192 };
193
194 static struct enamemem enametable[HASHNAMESIZE];
195 static struct enamemem nsaptable[HASHNAMESIZE];
196
197 struct bsnamemem {
198 u_short bs_addr0;
199 u_short bs_addr1;
200 u_short bs_addr2;
201 const char *bs_name;
202 u_char *bs_bytes;
203 unsigned int bs_nbytes;
204 struct bsnamemem *bs_nxt;
205 };
206
207 static struct bsnamemem bytestringtable[HASHNAMESIZE];
208
209 struct protoidmem {
210 uint32_t p_oui;
211 u_short p_proto;
212 const char *p_name;
213 struct protoidmem *p_nxt;
214 };
215
216 static struct protoidmem protoidtable[HASHNAMESIZE];
217
218 /*
219 * A faster replacement for inet_ntoa().
220 */
221 const char *
intoa(uint32_t addr)222 intoa(uint32_t addr)
223 {
224 char *cp;
225 u_int byte;
226 int n;
227 static char buf[sizeof(".xxx.xxx.xxx.xxx")];
228
229 addr = ntohl(addr);
230 cp = buf + sizeof(buf);
231 *--cp = '\0';
232
233 n = 4;
234 do {
235 byte = addr & 0xff;
236 *--cp = (char)(byte % 10) + '0';
237 byte /= 10;
238 if (byte > 0) {
239 *--cp = (char)(byte % 10) + '0';
240 byte /= 10;
241 if (byte > 0)
242 *--cp = (char)byte + '0';
243 }
244 *--cp = '.';
245 addr >>= 8;
246 } while (--n > 0);
247
248 return cp + 1;
249 }
250
251 static uint32_t f_netmask;
252 static uint32_t f_localnet;
253 #ifdef HAVE_CASPER
254 cap_channel_t *capdns;
255 #endif
256
257 /*
258 * Return a name for the IP address pointed to by ap. This address
259 * is assumed to be in network byte order.
260 *
261 * NOTE: ap is *NOT* necessarily part of the packet data, so you
262 * *CANNOT* use the ND_TCHECK_* or ND_TTEST_* macros on it. Furthermore,
263 * even in cases where it *is* part of the packet data, the caller
264 * would still have to check for a null return value, even if it's
265 * just printing the return value with "%s" - not all versions of
266 * printf print "(null)" with "%s" and a null pointer, some of them
267 * don't check for a null pointer and crash in that case.
268 *
269 * The callers of this routine should, before handing this routine
270 * a pointer to packet data, be sure that the data is present in
271 * the packet buffer. They should probably do those checks anyway,
272 * as other data at that layer might not be IP addresses, and it
273 * also needs to check whether they're present in the packet buffer.
274 */
275 const char *
ipaddr_string(netdissect_options * ndo,const u_char * ap)276 ipaddr_string(netdissect_options *ndo, const u_char *ap)
277 {
278 struct hostent *hp;
279 uint32_t addr;
280 struct hnamemem *p;
281
282 memcpy(&addr, ap, sizeof(addr));
283 p = &hnametable[addr & (HASHNAMESIZE-1)];
284 for (; p->nxt; p = p->nxt) {
285 if (p->addr == addr)
286 return (p->name);
287 }
288 p->addr = addr;
289 p->nxt = newhnamemem(ndo);
290
291 /*
292 * Print names unless:
293 * (1) -n was given.
294 * (2) Address is foreign and -f was given. (If -f was not
295 * given, f_netmask and f_localnet are 0 and the test
296 * evaluates to true)
297 */
298 if (!ndo->ndo_nflag &&
299 (addr & f_netmask) == f_localnet) {
300 #ifdef HAVE_CASPER
301 if (capdns != NULL) {
302 hp = cap_gethostbyaddr(capdns, (char *)&addr, 4,
303 AF_INET);
304 } else
305 #endif
306 hp = gethostbyaddr((char *)&addr, 4, AF_INET);
307 if (hp) {
308 char *dotp;
309
310 p->name = strdup(hp->h_name);
311 if (p->name == NULL)
312 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
313 "%s: strdup(hp->h_name)", __func__);
314 if (ndo->ndo_Nflag) {
315 /* Remove domain qualifications */
316 dotp = strchr(p->name, '.');
317 if (dotp)
318 *dotp = '\0';
319 }
320 return (p->name);
321 }
322 }
323 p->name = strdup(intoa(addr));
324 if (p->name == NULL)
325 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
326 "%s: strdup(intoa(addr))", __func__);
327 return (p->name);
328 }
329
330 /*
331 * Return a name for the IP6 address pointed to by ap. This address
332 * is assumed to be in network byte order.
333 */
334 const char *
ip6addr_string(netdissect_options * ndo,const u_char * ap)335 ip6addr_string(netdissect_options *ndo, const u_char *ap)
336 {
337 struct hostent *hp;
338 union {
339 nd_ipv6 addr;
340 struct for_hash_addr {
341 char fill[14];
342 uint16_t d;
343 } addra;
344 } addr;
345 struct h6namemem *p;
346 const char *cp;
347 char ntop_buf[INET6_ADDRSTRLEN];
348
349 memcpy(&addr, ap, sizeof(addr));
350 p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)];
351 for (; p->nxt; p = p->nxt) {
352 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
353 return (p->name);
354 }
355 memcpy(p->addr, addr.addr, sizeof(nd_ipv6));
356 p->nxt = newh6namemem(ndo);
357
358 /*
359 * Do not print names if -n was given.
360 */
361 if (!ndo->ndo_nflag) {
362 #ifdef HAVE_CASPER
363 if (capdns != NULL) {
364 hp = cap_gethostbyaddr(capdns, (char *)&addr,
365 sizeof(addr), AF_INET6);
366 } else
367 #endif
368 hp = gethostbyaddr((char *)&addr, sizeof(addr),
369 AF_INET6);
370 if (hp) {
371 char *dotp;
372
373 p->name = strdup(hp->h_name);
374 if (p->name == NULL)
375 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
376 "%s: strdup(hp->h_name)", __func__);
377 if (ndo->ndo_Nflag) {
378 /* Remove domain qualifications */
379 dotp = strchr(p->name, '.');
380 if (dotp)
381 *dotp = '\0';
382 }
383 return (p->name);
384 }
385 }
386 cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf));
387 p->name = strdup(cp);
388 if (p->name == NULL)
389 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
390 "%s: strdup(cp)", __func__);
391 return (p->name);
392 }
393
394 static const char hex[16] = {
395 '0', '1', '2', '3', '4', '5', '6', '7',
396 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
397 };
398
399 /*
400 * Convert an octet to two hex digits.
401 *
402 * Coverity appears either:
403 *
404 * not to believe the C standard when it asserts that a uint8_t is
405 * exactly 8 bits in size;
406 *
407 * not to believe that an unsigned type of exactly 8 bits has a value
408 * in the range of 0 to 255;
409 *
410 * not to believe that, for a range of unsigned values, if you shift
411 * one of those values right by 4 bits, the maximum result value is
412 * the maximum value shifted right by 4 bits, with no stray 1's shifted
413 * in;
414 *
415 * not to believe that 255 >> 4 is 15;
416 *
417 * so it gets upset that we're taking a "tainted" unsigned value, shifting
418 * it right 4 bits, and using it as an index into a 16-element array.
419 *
420 * So we do a stupid pointless masking of the result of the shift with
421 * 0xf, to hammer the point home to Coverity.
422 */
423 static inline char *
octet_to_hex(char * cp,uint8_t octet)424 octet_to_hex(char *cp, uint8_t octet)
425 {
426 *cp++ = hex[(octet >> 4) & 0xf];
427 *cp++ = hex[(octet >> 0) & 0xf];
428 return (cp);
429 }
430
431 /* Find the hash node that corresponds the ether address 'ep' */
432
433 static struct enamemem *
lookup_emem(netdissect_options * ndo,const u_char * ep)434 lookup_emem(netdissect_options *ndo, const u_char *ep)
435 {
436 u_int i, j, k;
437 struct enamemem *tp;
438
439 k = (ep[0] << 8) | ep[1];
440 j = (ep[2] << 8) | ep[3];
441 i = (ep[4] << 8) | ep[5];
442
443 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
444 while (tp->e_nxt)
445 if (tp->e_addr0 == i &&
446 tp->e_addr1 == j &&
447 tp->e_addr2 == k)
448 return tp;
449 else
450 tp = tp->e_nxt;
451 tp->e_addr0 = (u_short)i;
452 tp->e_addr1 = (u_short)j;
453 tp->e_addr2 = (u_short)k;
454 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
455 if (tp->e_nxt == NULL)
456 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
457
458 return tp;
459 }
460
461 /*
462 * Find the hash node that corresponds to the bytestring 'bs'
463 * with length 'nlen'
464 */
465
466 static struct bsnamemem *
lookup_bytestring(netdissect_options * ndo,const u_char * bs,const unsigned int nlen)467 lookup_bytestring(netdissect_options *ndo, const u_char *bs,
468 const unsigned int nlen)
469 {
470 struct bsnamemem *tp;
471 u_int i, j, k;
472
473 if (nlen >= 6) {
474 k = (bs[0] << 8) | bs[1];
475 j = (bs[2] << 8) | bs[3];
476 i = (bs[4] << 8) | bs[5];
477 } else if (nlen >= 4) {
478 k = (bs[0] << 8) | bs[1];
479 j = (bs[2] << 8) | bs[3];
480 i = 0;
481 } else
482 i = j = k = 0;
483
484 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
485 while (tp->bs_nxt)
486 if (nlen == tp->bs_nbytes &&
487 tp->bs_addr0 == i &&
488 tp->bs_addr1 == j &&
489 tp->bs_addr2 == k &&
490 memcmp((const char *)bs, (const char *)(tp->bs_bytes), nlen) == 0)
491 return tp;
492 else
493 tp = tp->bs_nxt;
494
495 tp->bs_addr0 = (u_short)i;
496 tp->bs_addr1 = (u_short)j;
497 tp->bs_addr2 = (u_short)k;
498
499 tp->bs_bytes = (u_char *) calloc(1, nlen);
500 if (tp->bs_bytes == NULL)
501 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
502 "%s: calloc", __func__);
503
504 memcpy(tp->bs_bytes, bs, nlen);
505 tp->bs_nbytes = nlen;
506 tp->bs_nxt = (struct bsnamemem *)calloc(1, sizeof(*tp));
507 if (tp->bs_nxt == NULL)
508 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
509 "%s: calloc", __func__);
510
511 return tp;
512 }
513
514 /* Find the hash node that corresponds the NSAP 'nsap' */
515
516 static struct enamemem *
lookup_nsap(netdissect_options * ndo,const u_char * nsap,u_int nsap_length)517 lookup_nsap(netdissect_options *ndo, const u_char *nsap,
518 u_int nsap_length)
519 {
520 u_int i, j, k;
521 struct enamemem *tp;
522 const u_char *ensap;
523
524 if (nsap_length > 6) {
525 ensap = nsap + nsap_length - 6;
526 k = (ensap[0] << 8) | ensap[1];
527 j = (ensap[2] << 8) | ensap[3];
528 i = (ensap[4] << 8) | ensap[5];
529 }
530 else
531 i = j = k = 0;
532
533 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
534 while (tp->e_nxt)
535 if (nsap_length == tp->e_nsap[0] &&
536 tp->e_addr0 == i &&
537 tp->e_addr1 == j &&
538 tp->e_addr2 == k &&
539 memcmp((const char *)nsap,
540 (char *)&(tp->e_nsap[1]), nsap_length) == 0)
541 return tp;
542 else
543 tp = tp->e_nxt;
544 tp->e_addr0 = (u_short)i;
545 tp->e_addr1 = (u_short)j;
546 tp->e_addr2 = (u_short)k;
547 tp->e_nsap = (u_char *)malloc(nsap_length + 1);
548 if (tp->e_nsap == NULL)
549 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: malloc", __func__);
550 tp->e_nsap[0] = (u_char)nsap_length; /* guaranteed < ISONSAP_MAX_LENGTH */
551 memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length);
552 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
553 if (tp->e_nxt == NULL)
554 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
555
556 return tp;
557 }
558
559 /* Find the hash node that corresponds the protoid 'pi'. */
560
561 static struct protoidmem *
lookup_protoid(netdissect_options * ndo,const u_char * pi)562 lookup_protoid(netdissect_options *ndo, const u_char *pi)
563 {
564 u_int i, j;
565 struct protoidmem *tp;
566
567 /* 5 octets won't be aligned */
568 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
569 j = (pi[3] << 8) + pi[4];
570 /* XXX should be endian-insensitive, but do big-endian testing XXX */
571
572 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
573 while (tp->p_nxt)
574 if (tp->p_oui == i && tp->p_proto == j)
575 return tp;
576 else
577 tp = tp->p_nxt;
578 tp->p_oui = i;
579 tp->p_proto = (u_short)j;
580 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
581 if (tp->p_nxt == NULL)
582 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
583
584 return tp;
585 }
586
587 const char *
etheraddr_string(netdissect_options * ndo,const uint8_t * ep)588 etheraddr_string(netdissect_options *ndo, const uint8_t *ep)
589 {
590 int i;
591 char *cp;
592 struct enamemem *tp;
593 int oui;
594 char buf[BUFSIZE];
595
596 tp = lookup_emem(ndo, ep);
597 if (tp->e_name)
598 return (tp->e_name);
599 #ifdef USE_ETHER_NTOHOST
600 if (!ndo->ndo_nflag) {
601 char buf2[BUFSIZE];
602 /*
603 * This is a non-const copy of ep for ether_ntohost(), which
604 * has its second argument non-const in OpenBSD. Also saves a
605 * type cast.
606 */
607 struct ether_addr ea;
608
609 memcpy (&ea, ep, MAC_ADDR_LEN);
610 if (ether_ntohost(buf2, &ea) == 0) {
611 tp->e_name = strdup(buf2);
612 if (tp->e_name == NULL)
613 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
614 "%s: strdup(buf2)", __func__);
615 return (tp->e_name);
616 }
617 }
618 #endif
619 cp = buf;
620 oui = EXTRACT_BE_U_3(ep);
621 cp = octet_to_hex(cp, *ep++);
622 for (i = 5; --i >= 0;) {
623 *cp++ = ':';
624 cp = octet_to_hex(cp, *ep++);
625 }
626
627 if (!ndo->ndo_nflag) {
628 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)",
629 tok2str(oui_values, "Unknown", oui));
630 } else
631 *cp = '\0';
632 tp->e_name = strdup(buf);
633 if (tp->e_name == NULL)
634 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
635 "%s: strdup(buf)", __func__);
636 return (tp->e_name);
637 }
638
639 const char *
le64addr_string(netdissect_options * ndo,const uint8_t * ep)640 le64addr_string(netdissect_options *ndo, const uint8_t *ep)
641 {
642 const unsigned int len = 8;
643 u_int i;
644 char *cp;
645 struct bsnamemem *tp;
646 char buf[BUFSIZE];
647
648 tp = lookup_bytestring(ndo, ep, len);
649 if (tp->bs_name)
650 return (tp->bs_name);
651
652 cp = buf;
653 for (i = len; i > 0 ; --i) {
654 cp = octet_to_hex(cp, *(ep + i - 1));
655 *cp++ = ':';
656 }
657 cp --;
658
659 *cp = '\0';
660
661 tp->bs_name = strdup(buf);
662 if (tp->bs_name == NULL)
663 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
664 "%s: strdup(buf)", __func__);
665
666 return (tp->bs_name);
667 }
668
669 const char *
linkaddr_string(netdissect_options * ndo,const uint8_t * ep,const unsigned int type,const unsigned int len)670 linkaddr_string(netdissect_options *ndo, const uint8_t *ep,
671 const unsigned int type, const unsigned int len)
672 {
673 u_int i;
674 char *cp;
675 struct bsnamemem *tp;
676
677 if (len == 0)
678 return ("<empty>");
679
680 if (type == LINKADDR_ETHER && len == MAC_ADDR_LEN)
681 return (etheraddr_string(ndo, ep));
682
683 if (type == LINKADDR_FRELAY)
684 return (q922_string(ndo, ep, len));
685
686 tp = lookup_bytestring(ndo, ep, len);
687 if (tp->bs_name)
688 return (tp->bs_name);
689
690 tp->bs_name = cp = (char *)malloc(len*3);
691 if (tp->bs_name == NULL)
692 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
693 "%s: malloc", __func__);
694 cp = octet_to_hex(cp, *ep++);
695 for (i = len-1; i > 0 ; --i) {
696 *cp++ = ':';
697 cp = octet_to_hex(cp, *ep++);
698 }
699 *cp = '\0';
700 return (tp->bs_name);
701 }
702
703 #define ISONSAP_MAX_LENGTH 20
704 const char *
isonsap_string(netdissect_options * ndo,const uint8_t * nsap,u_int nsap_length)705 isonsap_string(netdissect_options *ndo, const uint8_t *nsap,
706 u_int nsap_length)
707 {
708 u_int nsap_idx;
709 char *cp;
710 struct enamemem *tp;
711
712 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH)
713 return ("isonsap_string: illegal length");
714
715 tp = lookup_nsap(ndo, nsap, nsap_length);
716 if (tp->e_name)
717 return tp->e_name;
718
719 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx"));
720 if (cp == NULL)
721 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
722 "%s: malloc", __func__);
723
724 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
725 cp = octet_to_hex(cp, *nsap++);
726 if (((nsap_idx & 1) == 0) &&
727 (nsap_idx + 1 < nsap_length)) {
728 *cp++ = '.';
729 }
730 }
731 *cp = '\0';
732 return (tp->e_name);
733 }
734
735 const char *
tcpport_string(netdissect_options * ndo,u_short port)736 tcpport_string(netdissect_options *ndo, u_short port)
737 {
738 struct hnamemem *tp;
739 uint32_t i = port;
740 char buf[sizeof("00000")];
741
742 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
743 if (tp->addr == i)
744 return (tp->name);
745
746 tp->addr = i;
747 tp->nxt = newhnamemem(ndo);
748
749 (void)snprintf(buf, sizeof(buf), "%u", i);
750 tp->name = strdup(buf);
751 if (tp->name == NULL)
752 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
753 "%s: strdup(buf)", __func__);
754 return (tp->name);
755 }
756
757 const char *
udpport_string(netdissect_options * ndo,u_short port)758 udpport_string(netdissect_options *ndo, u_short port)
759 {
760 struct hnamemem *tp;
761 uint32_t i = port;
762 char buf[sizeof("00000")];
763
764 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
765 if (tp->addr == i)
766 return (tp->name);
767
768 tp->addr = i;
769 tp->nxt = newhnamemem(ndo);
770
771 (void)snprintf(buf, sizeof(buf), "%u", i);
772 tp->name = strdup(buf);
773 if (tp->name == NULL)
774 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
775 "%s: strdup(buf)", __func__);
776 return (tp->name);
777 }
778
779 const char *
ipxsap_string(netdissect_options * ndo,u_short port)780 ipxsap_string(netdissect_options *ndo, u_short port)
781 {
782 char *cp;
783 struct hnamemem *tp;
784 uint32_t i = port;
785 char buf[sizeof("0000")];
786
787 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
788 if (tp->addr == i)
789 return (tp->name);
790
791 tp->addr = i;
792 tp->nxt = newhnamemem(ndo);
793
794 cp = buf;
795 port = ntohs(port);
796 *cp++ = hex[port >> 12 & 0xf];
797 *cp++ = hex[port >> 8 & 0xf];
798 *cp++ = hex[port >> 4 & 0xf];
799 *cp++ = hex[port & 0xf];
800 *cp++ = '\0';
801 tp->name = strdup(buf);
802 if (tp->name == NULL)
803 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
804 "%s: strdup(buf)", __func__);
805 return (tp->name);
806 }
807
808 static void
init_servarray(netdissect_options * ndo)809 init_servarray(netdissect_options *ndo)
810 {
811 struct servent *sv;
812 struct hnamemem *table;
813 int i;
814 char buf[sizeof("0000000000")];
815
816 while ((sv = getservent()) != NULL) {
817 int port = ntohs(sv->s_port);
818 i = port & (HASHNAMESIZE-1);
819 if (strcmp(sv->s_proto, "tcp") == 0)
820 table = &tporttable[i];
821 else if (strcmp(sv->s_proto, "udp") == 0)
822 table = &uporttable[i];
823 else
824 continue;
825
826 while (table->name)
827 table = table->nxt;
828 if (ndo->ndo_nflag) {
829 (void)snprintf(buf, sizeof(buf), "%d", port);
830 table->name = strdup(buf);
831 } else
832 table->name = strdup(sv->s_name);
833 if (table->name == NULL)
834 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
835 "%s: strdup", __func__);
836
837 table->addr = port;
838 table->nxt = newhnamemem(ndo);
839 }
840 endservent();
841 }
842
843 static const struct eproto {
844 const char *s;
845 u_short p;
846 } eproto_db[] = {
847 { "aarp", ETHERTYPE_AARP },
848 { "arp", ETHERTYPE_ARP },
849 { "atalk", ETHERTYPE_ATALK },
850 { "decnet", ETHERTYPE_DN },
851 { "ip", ETHERTYPE_IP },
852 { "ip6", ETHERTYPE_IPV6 },
853 { "lat", ETHERTYPE_LAT },
854 { "loopback", ETHERTYPE_LOOPBACK },
855 { "mopdl", ETHERTYPE_MOPDL },
856 { "moprc", ETHERTYPE_MOPRC },
857 { "rarp", ETHERTYPE_REVARP },
858 { "sca", ETHERTYPE_SCA },
859 { (char *)0, 0 }
860 };
861
862 static void
init_eprotoarray(netdissect_options * ndo)863 init_eprotoarray(netdissect_options *ndo)
864 {
865 int i;
866 struct hnamemem *table;
867
868 for (i = 0; eproto_db[i].s; i++) {
869 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
870 table = &eprototable[j];
871 while (table->name)
872 table = table->nxt;
873 table->name = eproto_db[i].s;
874 table->addr = htons(eproto_db[i].p);
875 table->nxt = newhnamemem(ndo);
876 }
877 }
878
879 static const struct protoidlist {
880 const u_char protoid[5];
881 const char *name;
882 } protoidlist[] = {
883 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
884 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
885 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
886 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
887 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
888 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
889 };
890
891 /*
892 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
893 * types.
894 */
895 static void
init_protoidarray(netdissect_options * ndo)896 init_protoidarray(netdissect_options *ndo)
897 {
898 int i;
899 struct protoidmem *tp;
900 const struct protoidlist *pl;
901 u_char protoid[5];
902
903 protoid[0] = 0;
904 protoid[1] = 0;
905 protoid[2] = 0;
906 for (i = 0; eproto_db[i].s; i++) {
907 u_short etype = htons(eproto_db[i].p);
908
909 memcpy((char *)&protoid[3], (char *)&etype, 2);
910 tp = lookup_protoid(ndo, protoid);
911 tp->p_name = strdup(eproto_db[i].s);
912 if (tp->p_name == NULL)
913 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
914 "%s: strdup(eproto_db[i].s)", __func__);
915 }
916 /* Hardwire some SNAP proto ID names */
917 for (pl = protoidlist; pl->name != NULL; ++pl) {
918 tp = lookup_protoid(ndo, pl->protoid);
919 /* Don't override existing name */
920 if (tp->p_name != NULL)
921 continue;
922
923 tp->p_name = pl->name;
924 }
925 }
926
927 static const struct etherlist {
928 const nd_mac_addr addr;
929 const char *name;
930 } etherlist[] = {
931 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
932 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
933 };
934
935 /*
936 * Initialize the ethers hash table. We take two different approaches
937 * depending on whether or not the system provides the ethers name
938 * service. If it does, we just wire in a few names at startup,
939 * and etheraddr_string() fills in the table on demand. If it doesn't,
940 * then we suck in the entire /etc/ethers file at startup. The idea
941 * is that parsing the local file will be fast, but spinning through
942 * all the ethers entries via NIS & next_etherent might be very slow.
943 *
944 * XXX pcap_next_etherent doesn't belong in the pcap interface, but
945 * since the pcap module already does name-to-address translation,
946 * it's already does most of the work for the ethernet address-to-name
947 * translation, so we just pcap_next_etherent as a convenience.
948 */
949 static void
init_etherarray(netdissect_options * ndo)950 init_etherarray(netdissect_options *ndo)
951 {
952 const struct etherlist *el;
953 struct enamemem *tp;
954 #ifdef USE_ETHER_NTOHOST
955 char name[256];
956 #else
957 struct pcap_etherent *ep;
958 FILE *fp;
959
960 /* Suck in entire ethers file */
961 fp = fopen(PCAP_ETHERS_FILE, "r");
962 if (fp != NULL) {
963 while ((ep = pcap_next_etherent(fp)) != NULL) {
964 tp = lookup_emem(ndo, ep->addr);
965 tp->e_name = strdup(ep->name);
966 if (tp->e_name == NULL)
967 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
968 "%s: strdup(ep->addr)", __func__);
969 }
970 (void)fclose(fp);
971 }
972 #endif
973
974 /* Hardwire some ethernet names */
975 for (el = etherlist; el->name != NULL; ++el) {
976 tp = lookup_emem(ndo, el->addr);
977 /* Don't override existing name */
978 if (tp->e_name != NULL)
979 continue;
980
981 #ifdef USE_ETHER_NTOHOST
982 /*
983 * Use YP/NIS version of name if available.
984 */
985 /* Same workaround as in etheraddr_string(). */
986 struct ether_addr ea;
987 memcpy (&ea, el->addr, MAC_ADDR_LEN);
988 if (ether_ntohost(name, &ea) == 0) {
989 tp->e_name = strdup(name);
990 if (tp->e_name == NULL)
991 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
992 "%s: strdup(name)", __func__);
993 continue;
994 }
995 #endif
996 tp->e_name = el->name;
997 }
998 }
999
1000 static const struct ipxsap_ent {
1001 uint16_t v;
1002 const char *s;
1003 } ipxsap_db[] = {
1004 { 0x0000, "Unknown" },
1005 { 0x0001, "User" },
1006 { 0x0002, "User Group" },
1007 { 0x0003, "PrintQueue" },
1008 { 0x0004, "FileServer" },
1009 { 0x0005, "JobServer" },
1010 { 0x0006, "Gateway" },
1011 { 0x0007, "PrintServer" },
1012 { 0x0008, "ArchiveQueue" },
1013 { 0x0009, "ArchiveServer" },
1014 { 0x000a, "JobQueue" },
1015 { 0x000b, "Administration" },
1016 { 0x000F, "Novell TI-RPC" },
1017 { 0x0017, "Diagnostics" },
1018 { 0x0020, "NetBIOS" },
1019 { 0x0021, "NAS SNA Gateway" },
1020 { 0x0023, "NACS AsyncGateway" },
1021 { 0x0024, "RemoteBridge/RoutingService" },
1022 { 0x0026, "BridgeServer" },
1023 { 0x0027, "TCP/IP Gateway" },
1024 { 0x0028, "Point-to-point X.25 BridgeServer" },
1025 { 0x0029, "3270 Gateway" },
1026 { 0x002a, "CHI Corp" },
1027 { 0x002c, "PC Chalkboard" },
1028 { 0x002d, "TimeSynchServer" },
1029 { 0x002e, "ARCserve5.0/PalindromeBackup" },
1030 { 0x0045, "DI3270 Gateway" },
1031 { 0x0047, "AdvertisingPrintServer" },
1032 { 0x004a, "NetBlazerModems" },
1033 { 0x004b, "BtrieveVAP" },
1034 { 0x004c, "NetwareSQL" },
1035 { 0x004d, "XtreeNetwork" },
1036 { 0x0050, "BtrieveVAP4.11" },
1037 { 0x0052, "QuickLink" },
1038 { 0x0053, "PrintQueueUser" },
1039 { 0x0058, "Multipoint X.25 Router" },
1040 { 0x0060, "STLB/NLM" },
1041 { 0x0064, "ARCserve" },
1042 { 0x0066, "ARCserve3.0" },
1043 { 0x0072, "WAN CopyUtility" },
1044 { 0x007a, "TES-NetwareVMS" },
1045 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
1046 { 0x0095, "DDA OBGYN" },
1047 { 0x0098, "NetwareAccessServer" },
1048 { 0x009a, "Netware for VMS II/NamedPipeServer" },
1049 { 0x009b, "NetwareAccessServer" },
1050 { 0x009e, "PortableNetwareServer/SunLinkNVT" },
1051 { 0x00a1, "PowerchuteAPC UPS" },
1052 { 0x00aa, "LAWserve" },
1053 { 0x00ac, "CompaqIDA StatusMonitor" },
1054 { 0x0100, "PIPE STAIL" },
1055 { 0x0102, "LAN ProtectBindery" },
1056 { 0x0103, "OracleDataBaseServer" },
1057 { 0x0107, "Netware386/RSPX RemoteConsole" },
1058 { 0x010f, "NovellSNA Gateway" },
1059 { 0x0111, "TestServer" },
1060 { 0x0112, "HP PrintServer" },
1061 { 0x0114, "CSA MUX" },
1062 { 0x0115, "CSA LCA" },
1063 { 0x0116, "CSA CM" },
1064 { 0x0117, "CSA SMA" },
1065 { 0x0118, "CSA DBA" },
1066 { 0x0119, "CSA NMA" },
1067 { 0x011a, "CSA SSA" },
1068 { 0x011b, "CSA STATUS" },
1069 { 0x011e, "CSA APPC" },
1070 { 0x0126, "SNA TEST SSA Profile" },
1071 { 0x012a, "CSA TRACE" },
1072 { 0x012b, "NetwareSAA" },
1073 { 0x012e, "IKARUS VirusScan" },
1074 { 0x0130, "CommunicationsExecutive" },
1075 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
1076 { 0x0135, "NetwareNamingServicesProfile" },
1077 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
1078 { 0x0141, "LAN SpoolServer" },
1079 { 0x0152, "IRMALAN Gateway" },
1080 { 0x0154, "NamedPipeServer" },
1081 { 0x0166, "NetWareManagement" },
1082 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
1083 { 0x0173, "Compaq" },
1084 { 0x0174, "Compaq SNMP Agent" },
1085 { 0x0175, "Compaq" },
1086 { 0x0180, "XTreeServer/XTreeTools" },
1087 { 0x018A, "NASI ServicesBroadcastServer" },
1088 { 0x01b0, "GARP Gateway" },
1089 { 0x01b1, "Binfview" },
1090 { 0x01bf, "IntelLanDeskManager" },
1091 { 0x01ca, "AXTEC" },
1092 { 0x01cb, "ShivaNetModem/E" },
1093 { 0x01cc, "ShivaLanRover/E" },
1094 { 0x01cd, "ShivaLanRover/T" },
1095 { 0x01ce, "ShivaUniversal" },
1096 { 0x01d8, "CastelleFAXPressServer" },
1097 { 0x01da, "CastelleLANPressPrintServer" },
1098 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
1099 { 0x01f0, "LEGATO" },
1100 { 0x01f5, "LEGATO" },
1101 { 0x0233, "NMS Agent/NetwareManagementAgent" },
1102 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
1103 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
1104 { 0x023a, "LANtern" },
1105 { 0x023c, "MAVERICK" },
1106 { 0x023f, "NovellSMDR" },
1107 { 0x024e, "NetwareConnect" },
1108 { 0x024f, "NASI ServerBroadcast Cisco" },
1109 { 0x026a, "NMS ServiceConsole" },
1110 { 0x026b, "TimeSynchronizationServer Netware 4.x" },
1111 { 0x0278, "DirectoryServer Netware 4.x" },
1112 { 0x027b, "NetwareManagementAgent" },
1113 { 0x0280, "Novell File and Printer Sharing Service for PC" },
1114 { 0x0304, "NovellSAA Gateway" },
1115 { 0x0308, "COM/VERMED" },
1116 { 0x030a, "GalacticommWorldgroupServer" },
1117 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
1118 { 0x0320, "AttachmateGateway" },
1119 { 0x0327, "MicrosoftDiagnostiocs" },
1120 { 0x0328, "WATCOM SQL Server" },
1121 { 0x0335, "MultiTechSystems MultisynchCommServer" },
1122 { 0x0343, "Xylogics RemoteAccessServer/LANModem" },
1123 { 0x0355, "ArcadaBackupExec" },
1124 { 0x0358, "MSLCD1" },
1125 { 0x0361, "NETINELO" },
1126 { 0x037e, "Powerchute UPS Monitoring" },
1127 { 0x037f, "ViruSafeNotify" },
1128 { 0x0386, "HP Bridge" },
1129 { 0x0387, "HP Hub" },
1130 { 0x0394, "NetWare SAA Gateway" },
1131 { 0x039b, "LotusNotes" },
1132 { 0x03b7, "CertusAntiVirus" },
1133 { 0x03c4, "ARCserve4.0" },
1134 { 0x03c7, "LANspool3.5" },
1135 { 0x03d7, "LexmarkPrinterServer" },
1136 { 0x03d8, "LexmarkXLE PrinterServer" },
1137 { 0x03dd, "BanyanENS NetwareClient" },
1138 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
1139 { 0x03e1, "UnivelUnixware" },
1140 { 0x03e4, "UnivelUnixware" },
1141 { 0x03fc, "IntelNetport" },
1142 { 0x03fd, "PrintServerQueue" },
1143 { 0x040A, "ipnServer" },
1144 { 0x040D, "LVERRMAN" },
1145 { 0x040E, "LVLIC" },
1146 { 0x0414, "NET Silicon (DPI)/Kyocera" },
1147 { 0x0429, "SiteLockVirus" },
1148 { 0x0432, "UFHELPR???" },
1149 { 0x0433, "Synoptics281xAdvancedSNMPAgent" },
1150 { 0x0444, "MicrosoftNT SNA Server" },
1151 { 0x0448, "Oracle" },
1152 { 0x044c, "ARCserve5.01" },
1153 { 0x0457, "CanonGP55" },
1154 { 0x045a, "QMS Printers" },
1155 { 0x045b, "DellSCSI Array" },
1156 { 0x0491, "NetBlazerModems" },
1157 { 0x04ac, "OnTimeScheduler" },
1158 { 0x04b0, "CD-Net" },
1159 { 0x0513, "EmulexNQA" },
1160 { 0x0520, "SiteLockChecks" },
1161 { 0x0529, "SiteLockChecks" },
1162 { 0x052d, "CitrixOS2 AppServer" },
1163 { 0x0535, "Tektronix" },
1164 { 0x0536, "Milan" },
1165 { 0x055d, "Attachmate SNA gateway" },
1166 { 0x056b, "IBM8235 ModemServer" },
1167 { 0x056c, "ShivaLanRover/E PLUS" },
1168 { 0x056d, "ShivaLanRover/T PLUS" },
1169 { 0x0580, "McAfeeNetShield" },
1170 { 0x05B8, "NLM to workstation communication (Revelation Software)" },
1171 { 0x05BA, "CompatibleSystemsRouters" },
1172 { 0x05BE, "CheyenneHierarchicalStorageManager" },
1173 { 0x0606, "JCWatermarkImaging" },
1174 { 0x060c, "AXISNetworkPrinter" },
1175 { 0x0610, "AdaptecSCSIManagement" },
1176 { 0x0621, "IBM AntiVirus" },
1177 { 0x0640, "Windows95 RemoteRegistryService" },
1178 { 0x064e, "MicrosoftIIS" },
1179 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1180 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1181 { 0x076C, "Xerox" },
1182 { 0x079b, "ShivaLanRover/E 115" },
1183 { 0x079c, "ShivaLanRover/T 115" },
1184 { 0x07B4, "CubixWorldDesk" },
1185 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
1186 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
1187 { 0x0810, "ELAN License Server Demo" },
1188 { 0x0824, "ShivaLanRoverAccessSwitch/E" },
1189 { 0x086a, "ISSC Collector" },
1190 { 0x087f, "ISSC DAS AgentAIX" },
1191 { 0x0880, "Intel Netport PRO" },
1192 { 0x0881, "Intel Netport PRO" },
1193 { 0x0b29, "SiteLock" },
1194 { 0x0c29, "SiteLockApplications" },
1195 { 0x0c2c, "LicensingServer" },
1196 { 0x2101, "PerformanceTechnologyInstantInternet" },
1197 { 0x2380, "LAI SiteLock" },
1198 { 0x238c, "MeetingMaker" },
1199 { 0x4808, "SiteLockServer/SiteLockMetering" },
1200 { 0x5555, "SiteLockUser" },
1201 { 0x6312, "Tapeware" },
1202 { 0x6f00, "RabbitGateway" },
1203 { 0x7703, "MODEM" },
1204 { 0x8002, "NetPortPrinters" },
1205 { 0x8008, "WordPerfectNetworkVersion" },
1206 { 0x85BE, "Cisco EIGRP" },
1207 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
1208 { 0x9000, "McAfeeNetShield" },
1209 { 0x9604, "CSA-NT_MON" },
1210 { 0xb6a8, "OceanIsleReachoutRemoteControl" },
1211 { 0xf11f, "SiteLockMetering" },
1212 { 0xf1ff, "SiteLock" },
1213 { 0xf503, "Microsoft SQL Server" },
1214 { 0xF905, "IBM TimeAndPlace" },
1215 { 0xfbfb, "TopCallIII FaxServer" },
1216 { 0xffff, "AnyService/Wildcard" },
1217 { 0, (char *)0 }
1218 };
1219
1220 static void
init_ipxsaparray(netdissect_options * ndo)1221 init_ipxsaparray(netdissect_options *ndo)
1222 {
1223 int i;
1224 struct hnamemem *table;
1225
1226 for (i = 0; ipxsap_db[i].s != NULL; i++) {
1227 u_int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
1228 table = &ipxsaptable[j];
1229 while (table->name)
1230 table = table->nxt;
1231 table->name = ipxsap_db[i].s;
1232 table->addr = htons(ipxsap_db[i].v);
1233 table->nxt = newhnamemem(ndo);
1234 }
1235 }
1236
1237 /*
1238 * Initialize the address to name translation machinery. We map all
1239 * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true
1240 * (i.e., to prevent blocking on the nameserver). localnet is the IP address
1241 * of the local network. mask is its subnet mask.
1242 */
1243 void
init_addrtoname(netdissect_options * ndo,uint32_t localnet,uint32_t mask)1244 init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask)
1245 {
1246 if (ndo->ndo_fflag) {
1247 f_localnet = localnet;
1248 f_netmask = mask;
1249 }
1250 if (ndo->ndo_nflag)
1251 /*
1252 * Simplest way to suppress names.
1253 */
1254 return;
1255
1256 init_etherarray(ndo);
1257 init_servarray(ndo);
1258 init_eprotoarray(ndo);
1259 init_protoidarray(ndo);
1260 init_ipxsaparray(ndo);
1261 }
1262
1263 const char *
dnaddr_string(netdissect_options * ndo,u_short dnaddr)1264 dnaddr_string(netdissect_options *ndo, u_short dnaddr)
1265 {
1266 struct hnamemem *tp;
1267
1268 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL;
1269 tp = tp->nxt)
1270 if (tp->addr == dnaddr)
1271 return (tp->name);
1272
1273 tp->addr = dnaddr;
1274 tp->nxt = newhnamemem(ndo);
1275 tp->name = dnnum_string(ndo, dnaddr);
1276
1277 return(tp->name);
1278 }
1279
1280 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
1281 struct hnamemem *
newhnamemem(netdissect_options * ndo)1282 newhnamemem(netdissect_options *ndo)
1283 {
1284 struct hnamemem *p;
1285 static struct hnamemem *ptr = NULL;
1286 static u_int num = 0;
1287
1288 if (num == 0) {
1289 num = 64;
1290 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
1291 if (ptr == NULL)
1292 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
1293 "%s: calloc", __func__);
1294 }
1295 --num;
1296 p = ptr++;
1297 return (p);
1298 }
1299
1300 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
1301 struct h6namemem *
newh6namemem(netdissect_options * ndo)1302 newh6namemem(netdissect_options *ndo)
1303 {
1304 struct h6namemem *p;
1305 static struct h6namemem *ptr = NULL;
1306 static u_int num = 0;
1307
1308 if (num == 0) {
1309 num = 64;
1310 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
1311 if (ptr == NULL)
1312 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
1313 "%s: calloc", __func__);
1314 }
1315 --num;
1316 p = ptr++;
1317 return (p);
1318 }
1319
1320 /* Represent TCI part of the 802.1Q 4-octet tag as text. */
1321 const char *
ieee8021q_tci_string(const uint16_t tci)1322 ieee8021q_tci_string(const uint16_t tci)
1323 {
1324 static char buf[128];
1325 snprintf(buf, sizeof(buf), "vlan %u, p %u%s",
1326 tci & 0xfff,
1327 tci >> 13,
1328 (tci & 0x1000) ? ", DEI" : "");
1329 return buf;
1330 }
1331