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