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 #include <sys/cdefs.h>
25 #ifndef lint
26 __RCSID("$NetBSD: addrtoname.c,v 1.13 2024/09/02 16:15:29 christos Exp $");
27 #endif
28
29 #include <config.h>
30
31 #ifdef HAVE_CASPER
32 #include <libcasper.h>
33 #include <casper/cap_dns.h>
34 #endif /* HAVE_CASPER */
35
36 #include "netdissect-stdinc.h"
37
38 #ifdef USE_ETHER_NTOHOST
39 #if defined(NET_ETHERNET_H_DECLARES_ETHER_NTOHOST)
40 /*
41 * OK, just include <net/ethernet.h>.
42 */
43 #include <net/ethernet.h>
44 #elif defined(NETINET_ETHER_H_DECLARES_ETHER_NTOHOST)
45 /*
46 * OK, just include <netinet/ether.h>
47 */
48 #include <netinet/ether.h>
49 #elif defined(SYS_ETHERNET_H_DECLARES_ETHER_NTOHOST)
50 /*
51 * OK, just include <sys/ethernet.h>
52 */
53 #include <sys/ethernet.h>
54 #elif defined(ARPA_INET_H_DECLARES_ETHER_NTOHOST)
55 /*
56 * OK, just include <arpa/inet.h>
57 */
58 #include <arpa/inet.h>
59 #elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_NTOHOST)
60 /*
61 * OK, include <netinet/if_ether.h>, after all the other stuff we
62 * need to include or define for its benefit.
63 */
64 #define NEED_NETINET_IF_ETHER_H
65 #else
66 /*
67 * We'll have to declare it ourselves.
68 * If <netinet/if_ether.h> defines struct ether_addr, include
69 * it. Otherwise, define it ourselves.
70 */
71 #ifdef HAVE_STRUCT_ETHER_ADDR
72 #define NEED_NETINET_IF_ETHER_H
73 #else /* HAVE_STRUCT_ETHER_ADDR */
74 struct ether_addr {
75 /* Beware FreeBSD calls this "octet". */
76 unsigned char ether_addr_octet[MAC_ADDR_LEN];
77 };
78 #endif /* HAVE_STRUCT_ETHER_ADDR */
79 #endif /* what declares ether_ntohost() */
80
81 #ifdef NEED_NETINET_IF_ETHER_H
82 /*
83 * Include diag-control.h before <net/if.h>, which too defines a macro
84 * named ND_UNREACHABLE.
85 */
86 #include "diag-control.h"
87 #include <net/if.h> /* Needed on some platforms */
88 #include <netinet/in.h> /* Needed on some platforms */
89 #include <netinet/if_ether.h>
90 #endif /* NEED_NETINET_IF_ETHER_H */
91
92 #ifndef HAVE_DECL_ETHER_NTOHOST
93 /*
94 * No header declares it, so declare it ourselves.
95 */
96 extern int ether_ntohost(char *, const struct ether_addr *);
97 #endif /* !defined(HAVE_DECL_ETHER_NTOHOST) */
98 #endif /* USE_ETHER_NTOHOST */
99
100 #include <pcap.h>
101 #include <pcap-namedb.h>
102 #ifndef HAVE_GETSERVENT
103 #include <getservent.h>
104 #endif
105 #include <signal.h>
106 #include <stdio.h>
107 #include <string.h>
108 #include <stdlib.h>
109
110 #include "netdissect.h"
111 #include "addrtoname.h"
112 #include "addrtostr.h"
113 #include "ethertype.h"
114 #include "llc.h"
115 #include "extract.h"
116 #include "oui.h"
117
118 /*
119 * hash tables for whatever-to-name translations
120 *
121 * ndo_error() called on strdup(3) failure with S_ERR_ND_MEM_ALLOC status
122 */
123
124 #define HASHNAMESIZE 4096
125
126 struct hnamemem {
127 uint32_t addr;
128 const char *name;
129 struct hnamemem *nxt;
130 };
131
132 static struct hnamemem hnametable[HASHNAMESIZE];
133 static struct hnamemem tporttable[HASHNAMESIZE];
134 static struct hnamemem uporttable[HASHNAMESIZE];
135 static struct hnamemem eprototable[HASHNAMESIZE];
136 static struct hnamemem dnaddrtable[HASHNAMESIZE];
137 static struct hnamemem ipxsaptable[HASHNAMESIZE];
138
139 #ifdef _WIN32
140 /*
141 * fake gethostbyaddr for Win2k/XP
142 * gethostbyaddr() returns incorrect value when AF_INET6 is passed
143 * to 3rd argument.
144 *
145 * h_name in struct hostent is only valid.
146 */
147 static struct hostent *
win32_gethostbyaddr(const char * addr,int len,int type)148 win32_gethostbyaddr(const char *addr, int len, int type)
149 {
150 static struct hostent host;
151 static char hostbuf[NI_MAXHOST];
152 char hname[NI_MAXHOST];
153 struct sockaddr_in6 addr6;
154
155 host.h_name = hostbuf;
156 switch (type) {
157 case AF_INET:
158 return gethostbyaddr(addr, len, type);
159 break;
160 case AF_INET6:
161 memset(&addr6, 0, sizeof(addr6));
162 addr6.sin6_family = AF_INET6;
163 memcpy(&addr6.sin6_addr, addr, len);
164 if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
165 hname, sizeof(hname), NULL, 0, 0)) {
166 return NULL;
167 } else {
168 strlcpy(host.h_name, hname, NI_MAXHOST);
169 return &host;
170 }
171 break;
172 default:
173 return NULL;
174 }
175 }
176 #define gethostbyaddr win32_gethostbyaddr
177 #endif /* _WIN32 */
178
179 struct h6namemem {
180 nd_ipv6 addr;
181 char *name;
182 struct h6namemem *nxt;
183 };
184
185 static struct h6namemem h6nametable[HASHNAMESIZE];
186
187 struct enamemem {
188 u_short e_addr0;
189 u_short e_addr1;
190 u_short e_addr2;
191 const char *e_name;
192 u_char *e_nsap; /* used only for nsaptable[] */
193 struct enamemem *e_nxt;
194 };
195
196 static struct enamemem enametable[HASHNAMESIZE];
197 static struct enamemem nsaptable[HASHNAMESIZE];
198
199 struct bsnamemem {
200 u_short bs_addr0;
201 u_short bs_addr1;
202 u_short bs_addr2;
203 const char *bs_name;
204 u_char *bs_bytes;
205 unsigned int bs_nbytes;
206 struct bsnamemem *bs_nxt;
207 };
208
209 static struct bsnamemem bytestringtable[HASHNAMESIZE];
210
211 struct protoidmem {
212 uint32_t p_oui;
213 u_short p_proto;
214 const char *p_name;
215 struct protoidmem *p_nxt;
216 };
217
218 static struct protoidmem protoidtable[HASHNAMESIZE];
219
220 /*
221 * A faster replacement for inet_ntoa().
222 */
223 const char *
intoa(uint32_t addr)224 intoa(uint32_t addr)
225 {
226 char *cp;
227 u_int byte;
228 int n;
229 static char buf[sizeof(".xxx.xxx.xxx.xxx")];
230
231 addr = ntohl(addr);
232 cp = buf + sizeof(buf);
233 *--cp = '\0';
234
235 n = 4;
236 do {
237 byte = addr & 0xff;
238 *--cp = (char)(byte % 10) + '0';
239 byte /= 10;
240 if (byte > 0) {
241 *--cp = (char)(byte % 10) + '0';
242 byte /= 10;
243 if (byte > 0)
244 *--cp = (char)byte + '0';
245 }
246 *--cp = '.';
247 addr >>= 8;
248 } while (--n > 0);
249
250 return cp + 1;
251 }
252
253 static uint32_t f_netmask;
254 static uint32_t f_localnet;
255 #ifdef HAVE_CASPER
256 cap_channel_t *capdns;
257 #endif
258
259 /*
260 * Return a name for the IP address pointed to by ap. This address
261 * is assumed to be in network byte order.
262 *
263 * NOTE: ap is *NOT* necessarily part of the packet data, so you
264 * *CANNOT* use the ND_TCHECK_* or ND_TTEST_* macros on it. Furthermore,
265 * even in cases where it *is* part of the packet data, the caller
266 * would still have to check for a null return value, even if it's
267 * just printing the return value with "%s" - not all versions of
268 * printf print "(null)" with "%s" and a null pointer, some of them
269 * don't check for a null pointer and crash in that case.
270 *
271 * The callers of this routine should, before handing this routine
272 * a pointer to packet data, be sure that the data is present in
273 * the packet buffer. They should probably do those checks anyway,
274 * as other data at that layer might not be IP addresses, and it
275 * also needs to check whether they're present in the packet buffer.
276 */
277 const char *
ipaddr_string(netdissect_options * ndo,const u_char * ap)278 ipaddr_string(netdissect_options *ndo, const u_char *ap)
279 {
280 struct hostent *hp;
281 uint32_t addr;
282 struct hnamemem *p;
283
284 memcpy(&addr, ap, sizeof(addr));
285 p = &hnametable[addr & (HASHNAMESIZE-1)];
286 for (; p->nxt; p = p->nxt) {
287 if (p->addr == addr)
288 return (p->name);
289 }
290 p->addr = addr;
291 p->nxt = newhnamemem(ndo);
292
293 /*
294 * Print names unless:
295 * (1) -n was given.
296 * (2) Address is foreign and -f was given. (If -f was not
297 * given, f_netmask and f_localnet are 0 and the test
298 * evaluates to true)
299 */
300 if (!ndo->ndo_nflag &&
301 (addr & f_netmask) == f_localnet) {
302 #ifdef HAVE_CASPER
303 if (capdns != NULL) {
304 hp = cap_gethostbyaddr(capdns, (char *)&addr, 4,
305 AF_INET);
306 } else
307 #endif
308 hp = gethostbyaddr((char *)&addr, 4, AF_INET);
309 if (hp) {
310 char *dotp;
311
312 p->name = strdup(hp->h_name);
313 if (p->name == NULL)
314 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
315 "%s: strdup(hp->h_name)", __func__);
316 if (ndo->ndo_Nflag) {
317 /* Remove domain qualifications */
318 dotp = strchr(p->name, '.');
319 if (dotp)
320 *dotp = '\0';
321 }
322 return (p->name);
323 }
324 }
325 p->name = strdup(intoa(addr));
326 if (p->name == NULL)
327 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
328 "%s: strdup(intoa(addr))", __func__);
329 return (p->name);
330 }
331
332 /*
333 * Return a name for the IP6 address pointed to by ap. This address
334 * is assumed to be in network byte order.
335 */
336 const char *
ip6addr_string(netdissect_options * ndo,const u_char * ap)337 ip6addr_string(netdissect_options *ndo, const u_char *ap)
338 {
339 struct hostent *hp;
340 union {
341 nd_ipv6 addr;
342 struct for_hash_addr {
343 char fill[14];
344 uint16_t d;
345 } addra;
346 } addr;
347 struct h6namemem *p;
348 const char *cp;
349 char ntop_buf[INET6_ADDRSTRLEN];
350
351 memcpy(&addr, ap, sizeof(addr));
352 p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)];
353 for (; p->nxt; p = p->nxt) {
354 if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
355 return (p->name);
356 }
357 memcpy(p->addr, addr.addr, sizeof(nd_ipv6));
358 p->nxt = newh6namemem(ndo);
359
360 /*
361 * Do not print names if -n was given.
362 */
363 if (!ndo->ndo_nflag) {
364 #ifdef HAVE_CASPER
365 if (capdns != NULL) {
366 hp = cap_gethostbyaddr(capdns, (char *)&addr,
367 sizeof(addr), AF_INET6);
368 } else
369 #endif
370 hp = gethostbyaddr((char *)&addr, sizeof(addr),
371 AF_INET6);
372 if (hp) {
373 char *dotp;
374
375 p->name = strdup(hp->h_name);
376 if (p->name == NULL)
377 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
378 "%s: strdup(hp->h_name)", __func__);
379 if (ndo->ndo_Nflag) {
380 /* Remove domain qualifications */
381 dotp = strchr(p->name, '.');
382 if (dotp)
383 *dotp = '\0';
384 }
385 return (p->name);
386 }
387 }
388 cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf));
389 p->name = strdup(cp);
390 if (p->name == NULL)
391 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
392 "%s: strdup(cp)", __func__);
393 return (p->name);
394 }
395
396 static const char hex[16] = {
397 '0', '1', '2', '3', '4', '5', '6', '7',
398 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
399 };
400
401 /*
402 * Convert an octet to two hex digits.
403 *
404 * Coverity appears either:
405 *
406 * not to believe the C standard when it asserts that a uint8_t is
407 * exactly 8 bits in size;
408 *
409 * not to believe that an unsigned type of exactly 8 bits has a value
410 * in the range of 0 to 255;
411 *
412 * not to believe that, for a range of unsigned values, if you shift
413 * one of those values right by 4 bits, the maximum result value is
414 * the maximum value shifted right by 4 bits, with no stray 1's shifted
415 * in;
416 *
417 * not to believe that 255 >> 4 is 15;
418 *
419 * so it gets upset that we're taking a "tainted" unsigned value, shifting
420 * it right 4 bits, and using it as an index into a 16-element array.
421 *
422 * So we do a stupid pointless masking of the result of the shift with
423 * 0xf, to hammer the point home to Coverity.
424 */
425 static inline char *
octet_to_hex(char * cp,uint8_t octet)426 octet_to_hex(char *cp, uint8_t octet)
427 {
428 *cp++ = hex[(octet >> 4) & 0xf];
429 *cp++ = hex[(octet >> 0) & 0xf];
430 return (cp);
431 }
432
433 /* Find the hash node that corresponds the ether address 'ep' */
434
435 static struct enamemem *
lookup_emem(netdissect_options * ndo,const u_char * ep)436 lookup_emem(netdissect_options *ndo, const u_char *ep)
437 {
438 u_int i, j, k;
439 struct enamemem *tp;
440
441 k = (ep[0] << 8) | ep[1];
442 j = (ep[2] << 8) | ep[3];
443 i = (ep[4] << 8) | ep[5];
444
445 tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
446 while (tp->e_nxt)
447 if (tp->e_addr0 == i &&
448 tp->e_addr1 == j &&
449 tp->e_addr2 == k)
450 return tp;
451 else
452 tp = tp->e_nxt;
453 tp->e_addr0 = (u_short)i;
454 tp->e_addr1 = (u_short)j;
455 tp->e_addr2 = (u_short)k;
456 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
457 if (tp->e_nxt == NULL)
458 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
459
460 return tp;
461 }
462
463 /*
464 * Find the hash node that corresponds to the bytestring 'bs'
465 * with length 'nlen'
466 */
467
468 static struct bsnamemem *
lookup_bytestring(netdissect_options * ndo,const u_char * bs,const unsigned int nlen)469 lookup_bytestring(netdissect_options *ndo, const u_char *bs,
470 const unsigned int nlen)
471 {
472 struct bsnamemem *tp;
473 u_int i, j, k;
474
475 if (nlen >= 6) {
476 k = (bs[0] << 8) | bs[1];
477 j = (bs[2] << 8) | bs[3];
478 i = (bs[4] << 8) | bs[5];
479 } else if (nlen >= 4) {
480 k = (bs[0] << 8) | bs[1];
481 j = (bs[2] << 8) | bs[3];
482 i = 0;
483 } else
484 i = j = k = 0;
485
486 tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
487 while (tp->bs_nxt)
488 if (nlen == tp->bs_nbytes &&
489 tp->bs_addr0 == i &&
490 tp->bs_addr1 == j &&
491 tp->bs_addr2 == k &&
492 memcmp((const char *)bs, (const char *)(tp->bs_bytes), nlen) == 0)
493 return tp;
494 else
495 tp = tp->bs_nxt;
496
497 tp->bs_addr0 = (u_short)i;
498 tp->bs_addr1 = (u_short)j;
499 tp->bs_addr2 = (u_short)k;
500
501 tp->bs_bytes = (u_char *) calloc(1, nlen);
502 if (tp->bs_bytes == NULL)
503 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
504 "%s: calloc", __func__);
505
506 memcpy(tp->bs_bytes, bs, nlen);
507 tp->bs_nbytes = nlen;
508 tp->bs_nxt = (struct bsnamemem *)calloc(1, sizeof(*tp));
509 if (tp->bs_nxt == NULL)
510 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
511 "%s: calloc", __func__);
512
513 return tp;
514 }
515
516 /* Find the hash node that corresponds the NSAP 'nsap' */
517
518 static struct enamemem *
lookup_nsap(netdissect_options * ndo,const u_char * nsap,u_int nsap_length)519 lookup_nsap(netdissect_options *ndo, const u_char *nsap,
520 u_int nsap_length)
521 {
522 u_int i, j, k;
523 struct enamemem *tp;
524 const u_char *ensap;
525
526 if (nsap_length > 6) {
527 ensap = nsap + nsap_length - 6;
528 k = (ensap[0] << 8) | ensap[1];
529 j = (ensap[2] << 8) | ensap[3];
530 i = (ensap[4] << 8) | ensap[5];
531 } else
532 i = j = k = 0;
533
534 tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
535 while (tp->e_nxt)
536 if (nsap_length == tp->e_nsap[0] &&
537 tp->e_addr0 == i &&
538 tp->e_addr1 == j &&
539 tp->e_addr2 == k &&
540 memcmp((const char *)nsap,
541 (char *)&(tp->e_nsap[1]), nsap_length) == 0)
542 return tp;
543 else
544 tp = tp->e_nxt;
545 tp->e_addr0 = (u_short)i;
546 tp->e_addr1 = (u_short)j;
547 tp->e_addr2 = (u_short)k;
548 tp->e_nsap = (u_char *)malloc(nsap_length + 1);
549 if (tp->e_nsap == NULL)
550 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: malloc", __func__);
551 tp->e_nsap[0] = (u_char)nsap_length; /* guaranteed < ISONSAP_MAX_LENGTH */
552 memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length);
553 tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
554 if (tp->e_nxt == NULL)
555 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
556
557 return tp;
558 }
559
560 /* Find the hash node that corresponds the protoid 'pi'. */
561
562 static struct protoidmem *
lookup_protoid(netdissect_options * ndo,const u_char * pi)563 lookup_protoid(netdissect_options *ndo, const u_char *pi)
564 {
565 u_int i, j;
566 struct protoidmem *tp;
567
568 /* 5 octets won't be aligned */
569 i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
570 j = (pi[3] << 8) + pi[4];
571 /* XXX should be endian-insensitive, but do big-endian testing XXX */
572
573 tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
574 while (tp->p_nxt)
575 if (tp->p_oui == i && tp->p_proto == j)
576 return tp;
577 else
578 tp = tp->p_nxt;
579 tp->p_oui = i;
580 tp->p_proto = (u_short)j;
581 tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
582 if (tp->p_nxt == NULL)
583 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
584
585 return tp;
586 }
587
588 const char *
etheraddr_string(netdissect_options * ndo,const uint8_t * ep)589 etheraddr_string(netdissect_options *ndo, const uint8_t *ep)
590 {
591 int i;
592 char *cp;
593 struct enamemem *tp;
594 int oui;
595 char buf[BUFSIZE];
596
597 tp = lookup_emem(ndo, ep);
598 if (tp->e_name)
599 return (tp->e_name);
600 #ifdef USE_ETHER_NTOHOST
601 if (!ndo->ndo_nflag) {
602 char buf2[BUFSIZE];
603 /*
604 * This is a non-const copy of ep for ether_ntohost(), which
605 * has its second argument non-const in OpenBSD. Also saves a
606 * type cast.
607 */
608 struct ether_addr ea;
609
610 memcpy (&ea, ep, MAC_ADDR_LEN);
611 if (ether_ntohost(buf2, &ea) == 0) {
612 tp->e_name = strdup(buf2);
613 if (tp->e_name == NULL)
614 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
615 "%s: strdup(buf2)", __func__);
616 return (tp->e_name);
617 }
618 }
619 #endif
620 cp = buf;
621 oui = EXTRACT_BE_U_3(ep);
622 cp = octet_to_hex(cp, *ep++);
623 for (i = 5; --i >= 0;) {
624 *cp++ = ':';
625 cp = octet_to_hex(cp, *ep++);
626 }
627
628 if (!ndo->ndo_nflag) {
629 snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)",
630 tok2str(oui_values, "Unknown", oui));
631 } else
632 *cp = '\0';
633 tp->e_name = strdup(buf);
634 if (tp->e_name == NULL)
635 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
636 "%s: strdup(buf)", __func__);
637 return (tp->e_name);
638 }
639
640 const char *
le64addr_string(netdissect_options * ndo,const uint8_t * ep)641 le64addr_string(netdissect_options *ndo, const uint8_t *ep)
642 {
643 const unsigned int len = 8;
644 u_int i;
645 char *cp;
646 struct bsnamemem *tp;
647 char buf[BUFSIZE];
648
649 tp = lookup_bytestring(ndo, ep, len);
650 if (tp->bs_name)
651 return (tp->bs_name);
652
653 cp = buf;
654 for (i = len; i > 0 ; --i) {
655 cp = octet_to_hex(cp, *(ep + i - 1));
656 *cp++ = ':';
657 }
658 cp --;
659
660 *cp = '\0';
661
662 tp->bs_name = strdup(buf);
663 if (tp->bs_name == NULL)
664 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
665 "%s: strdup(buf)", __func__);
666
667 return (tp->bs_name);
668 }
669
670 const char *
linkaddr_string(netdissect_options * ndo,const uint8_t * ep,const unsigned int type,const unsigned int len)671 linkaddr_string(netdissect_options *ndo, const uint8_t *ep,
672 const unsigned int type, const unsigned int len)
673 {
674 u_int i;
675 char *cp;
676 struct bsnamemem *tp;
677
678 if (len == 0)
679 return ("<empty>");
680
681 if (type == LINKADDR_ETHER && len == MAC_ADDR_LEN)
682 return (etheraddr_string(ndo, ep));
683
684 if (type == LINKADDR_FRELAY)
685 return (q922_string(ndo, ep, len));
686
687 tp = lookup_bytestring(ndo, ep, len);
688 if (tp->bs_name)
689 return (tp->bs_name);
690
691 tp->bs_name = cp = (char *)malloc(len*3);
692 if (tp->bs_name == NULL)
693 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
694 "%s: malloc", __func__);
695 cp = octet_to_hex(cp, *ep++);
696 for (i = len-1; i > 0 ; --i) {
697 *cp++ = ':';
698 cp = octet_to_hex(cp, *ep++);
699 }
700 *cp = '\0';
701 return (tp->bs_name);
702 }
703
704 #define ISONSAP_MAX_LENGTH 20
705 const char *
isonsap_string(netdissect_options * ndo,const uint8_t * nsap,u_int nsap_length)706 isonsap_string(netdissect_options *ndo, const uint8_t *nsap,
707 u_int nsap_length)
708 {
709 u_int nsap_idx;
710 char *cp;
711 struct enamemem *tp;
712
713 if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH)
714 return ("isonsap_string: illegal length");
715
716 tp = lookup_nsap(ndo, nsap, nsap_length);
717 if (tp->e_name)
718 return tp->e_name;
719
720 tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx"));
721 if (cp == NULL)
722 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
723 "%s: malloc", __func__);
724
725 for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
726 cp = octet_to_hex(cp, *nsap++);
727 if (((nsap_idx & 1) == 0) &&
728 (nsap_idx + 1 < nsap_length)) {
729 *cp++ = '.';
730 }
731 }
732 *cp = '\0';
733 return (tp->e_name);
734 }
735
736 const char *
tcpport_string(netdissect_options * ndo,u_short port)737 tcpport_string(netdissect_options *ndo, u_short port)
738 {
739 struct hnamemem *tp;
740 uint32_t i = port;
741 char buf[sizeof("00000")];
742
743 for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
744 if (tp->addr == i)
745 return (tp->name);
746
747 tp->addr = i;
748 tp->nxt = newhnamemem(ndo);
749
750 (void)snprintf(buf, sizeof(buf), "%u", i);
751 tp->name = strdup(buf);
752 if (tp->name == NULL)
753 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
754 "%s: strdup(buf)", __func__);
755 return (tp->name);
756 }
757
758 const char *
udpport_string(netdissect_options * ndo,u_short port)759 udpport_string(netdissect_options *ndo, u_short port)
760 {
761 struct hnamemem *tp;
762 uint32_t i = port;
763 char buf[sizeof("00000")];
764
765 for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
766 if (tp->addr == i)
767 return (tp->name);
768
769 tp->addr = i;
770 tp->nxt = newhnamemem(ndo);
771
772 (void)snprintf(buf, sizeof(buf), "%u", i);
773 tp->name = strdup(buf);
774 if (tp->name == NULL)
775 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
776 "%s: strdup(buf)", __func__);
777 return (tp->name);
778 }
779
780 const char *
ipxsap_string(netdissect_options * ndo,u_short port)781 ipxsap_string(netdissect_options *ndo, u_short port)
782 {
783 char *cp;
784 struct hnamemem *tp;
785 uint32_t i = port;
786 char buf[sizeof("0000")];
787
788 for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
789 if (tp->addr == i)
790 return (tp->name);
791
792 tp->addr = i;
793 tp->nxt = newhnamemem(ndo);
794
795 cp = buf;
796 port = ntohs(port);
797 *cp++ = hex[port >> 12 & 0xf];
798 *cp++ = hex[port >> 8 & 0xf];
799 *cp++ = hex[port >> 4 & 0xf];
800 *cp++ = hex[port & 0xf];
801 *cp++ = '\0';
802 tp->name = strdup(buf);
803 if (tp->name == NULL)
804 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
805 "%s: strdup(buf)", __func__);
806 return (tp->name);
807 }
808
809 static void
init_servarray(netdissect_options * ndo)810 init_servarray(netdissect_options *ndo)
811 {
812 struct servent *sv;
813 struct hnamemem *table;
814 int i;
815 char buf[sizeof("0000000000")];
816
817 while ((sv = getservent()) != NULL) {
818 int port = ntohs(sv->s_port);
819 i = port & (HASHNAMESIZE-1);
820 if (strcmp(sv->s_proto, "tcp") == 0)
821 table = &tporttable[i];
822 else if (strcmp(sv->s_proto, "udp") == 0)
823 table = &uporttable[i];
824 else
825 continue;
826
827 while (table->name)
828 table = table->nxt;
829 if (ndo->ndo_nflag) {
830 (void)snprintf(buf, sizeof(buf), "%d", port);
831 table->name = strdup(buf);
832 } else
833 table->name = strdup(sv->s_name);
834 if (table->name == NULL)
835 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
836 "%s: strdup", __func__);
837
838 table->addr = port;
839 table->nxt = newhnamemem(ndo);
840 }
841 endservent();
842 }
843
844 static const struct eproto {
845 const char *s;
846 u_short p;
847 } eproto_db[] = {
848 { "aarp", ETHERTYPE_AARP },
849 { "arp", ETHERTYPE_ARP },
850 { "atalk", ETHERTYPE_ATALK },
851 { "decnet", ETHERTYPE_DN },
852 { "ip", ETHERTYPE_IP },
853 { "ip6", ETHERTYPE_IPV6 },
854 { "lat", ETHERTYPE_LAT },
855 { "loopback", ETHERTYPE_LOOPBACK },
856 { "mopdl", ETHERTYPE_MOPDL },
857 { "moprc", ETHERTYPE_MOPRC },
858 { "rarp", ETHERTYPE_REVARP },
859 { "sca", ETHERTYPE_SCA },
860 { (char *)0, 0 }
861 };
862
863 static void
init_eprotoarray(netdissect_options * ndo)864 init_eprotoarray(netdissect_options *ndo)
865 {
866 int i;
867 struct hnamemem *table;
868
869 for (i = 0; eproto_db[i].s; i++) {
870 int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
871 table = &eprototable[j];
872 while (table->name)
873 table = table->nxt;
874 table->name = eproto_db[i].s;
875 table->addr = htons(eproto_db[i].p);
876 table->nxt = newhnamemem(ndo);
877 }
878 }
879
880 static const struct protoidlist {
881 const u_char protoid[5];
882 const char *name;
883 } protoidlist[] = {
884 {{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
885 {{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
886 {{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
887 {{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
888 {{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
889 {{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
890 };
891
892 /*
893 * SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
894 * types.
895 */
896 static void
init_protoidarray(netdissect_options * ndo)897 init_protoidarray(netdissect_options *ndo)
898 {
899 int i;
900 struct protoidmem *tp;
901 const struct protoidlist *pl;
902 u_char protoid[5];
903
904 protoid[0] = 0;
905 protoid[1] = 0;
906 protoid[2] = 0;
907 for (i = 0; eproto_db[i].s; i++) {
908 u_short etype = htons(eproto_db[i].p);
909
910 memcpy((char *)&protoid[3], (char *)&etype, 2);
911 tp = lookup_protoid(ndo, protoid);
912 tp->p_name = strdup(eproto_db[i].s);
913 if (tp->p_name == NULL)
914 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
915 "%s: strdup(eproto_db[i].s)", __func__);
916 }
917 /* Hardwire some SNAP proto ID names */
918 for (pl = protoidlist; pl->name != NULL; ++pl) {
919 tp = lookup_protoid(ndo, pl->protoid);
920 /* Don't override existing name */
921 if (tp->p_name != NULL)
922 continue;
923
924 tp->p_name = pl->name;
925 }
926 }
927
928 static const struct etherlist {
929 const nd_mac_addr addr;
930 const char *name;
931 } etherlist[] = {
932 {{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
933 {{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
934 };
935
936 /*
937 * Initialize the ethers hash table. We take two different approaches
938 * depending on whether or not the system provides the ethers name
939 * service. If it does, we just wire in a few names at startup,
940 * and etheraddr_string() fills in the table on demand. If it doesn't,
941 * then we suck in the entire /etc/ethers file at startup. The idea
942 * is that parsing the local file will be fast, but spinning through
943 * all the ethers entries via NIS & next_etherent might be very slow.
944 *
945 * XXX pcap_next_etherent doesn't belong in the pcap interface, but
946 * since the pcap module already does name-to-address translation,
947 * it's already does most of the work for the ethernet address-to-name
948 * translation, so we just pcap_next_etherent as a convenience.
949 */
950 static void
init_etherarray(netdissect_options * ndo)951 init_etherarray(netdissect_options *ndo)
952 {
953 const struct etherlist *el;
954 struct enamemem *tp;
955 #ifdef USE_ETHER_NTOHOST
956 char name[256];
957 #else
958 struct pcap_etherent *ep;
959 FILE *fp;
960
961 /* Suck in entire ethers file */
962 fp = fopen(PCAP_ETHERS_FILE, "r");
963 if (fp != NULL) {
964 while ((ep = pcap_next_etherent(fp)) != NULL) {
965 tp = lookup_emem(ndo, ep->addr);
966 tp->e_name = strdup(ep->name);
967 if (tp->e_name == NULL)
968 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
969 "%s: strdup(ep->addr)", __func__);
970 }
971 (void)fclose(fp);
972 }
973 #endif
974
975 /* Hardwire some ethernet names */
976 for (el = etherlist; el->name != NULL; ++el) {
977 tp = lookup_emem(ndo, el->addr);
978 /* Don't override existing name */
979 if (tp->e_name != NULL)
980 continue;
981
982 #ifdef USE_ETHER_NTOHOST
983 /*
984 * Use YP/NIS version of name if available.
985 */
986 /* Same workaround as in etheraddr_string(). */
987 struct ether_addr ea;
988 memcpy (&ea, el->addr, MAC_ADDR_LEN);
989 if (ether_ntohost(name, &ea) == 0) {
990 tp->e_name = strdup(name);
991 if (tp->e_name == NULL)
992 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
993 "%s: strdup(name)", __func__);
994 continue;
995 }
996 #endif
997 tp->e_name = el->name;
998 }
999 }
1000
1001 static const struct ipxsap_ent {
1002 uint16_t v;
1003 const char *s;
1004 } ipxsap_db[] = {
1005 { 0x0000, "Unknown" },
1006 { 0x0001, "User" },
1007 { 0x0002, "User Group" },
1008 { 0x0003, "PrintQueue" },
1009 { 0x0004, "FileServer" },
1010 { 0x0005, "JobServer" },
1011 { 0x0006, "Gateway" },
1012 { 0x0007, "PrintServer" },
1013 { 0x0008, "ArchiveQueue" },
1014 { 0x0009, "ArchiveServer" },
1015 { 0x000a, "JobQueue" },
1016 { 0x000b, "Administration" },
1017 { 0x000F, "Novell TI-RPC" },
1018 { 0x0017, "Diagnostics" },
1019 { 0x0020, "NetBIOS" },
1020 { 0x0021, "NAS SNA Gateway" },
1021 { 0x0023, "NACS AsyncGateway" },
1022 { 0x0024, "RemoteBridge/RoutingService" },
1023 { 0x0026, "BridgeServer" },
1024 { 0x0027, "TCP/IP Gateway" },
1025 { 0x0028, "Point-to-point X.25 BridgeServer" },
1026 { 0x0029, "3270 Gateway" },
1027 { 0x002a, "CHI Corp" },
1028 { 0x002c, "PC Chalkboard" },
1029 { 0x002d, "TimeSynchServer" },
1030 { 0x002e, "ARCserve5.0/PalindromeBackup" },
1031 { 0x0045, "DI3270 Gateway" },
1032 { 0x0047, "AdvertisingPrintServer" },
1033 { 0x004a, "NetBlazerModems" },
1034 { 0x004b, "BtrieveVAP" },
1035 { 0x004c, "NetwareSQL" },
1036 { 0x004d, "XtreeNetwork" },
1037 { 0x0050, "BtrieveVAP4.11" },
1038 { 0x0052, "QuickLink" },
1039 { 0x0053, "PrintQueueUser" },
1040 { 0x0058, "Multipoint X.25 Router" },
1041 { 0x0060, "STLB/NLM" },
1042 { 0x0064, "ARCserve" },
1043 { 0x0066, "ARCserve3.0" },
1044 { 0x0072, "WAN CopyUtility" },
1045 { 0x007a, "TES-NetwareVMS" },
1046 { 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
1047 { 0x0095, "DDA OBGYN" },
1048 { 0x0098, "NetwareAccessServer" },
1049 { 0x009a, "Netware for VMS II/NamedPipeServer" },
1050 { 0x009b, "NetwareAccessServer" },
1051 { 0x009e, "PortableNetwareServer/SunLinkNVT" },
1052 { 0x00a1, "PowerchuteAPC UPS" },
1053 { 0x00aa, "LAWserve" },
1054 { 0x00ac, "CompaqIDA StatusMonitor" },
1055 { 0x0100, "PIPE STAIL" },
1056 { 0x0102, "LAN ProtectBindery" },
1057 { 0x0103, "OracleDataBaseServer" },
1058 { 0x0107, "Netware386/RSPX RemoteConsole" },
1059 { 0x010f, "NovellSNA Gateway" },
1060 { 0x0111, "TestServer" },
1061 { 0x0112, "HP PrintServer" },
1062 { 0x0114, "CSA MUX" },
1063 { 0x0115, "CSA LCA" },
1064 { 0x0116, "CSA CM" },
1065 { 0x0117, "CSA SMA" },
1066 { 0x0118, "CSA DBA" },
1067 { 0x0119, "CSA NMA" },
1068 { 0x011a, "CSA SSA" },
1069 { 0x011b, "CSA STATUS" },
1070 { 0x011e, "CSA APPC" },
1071 { 0x0126, "SNA TEST SSA Profile" },
1072 { 0x012a, "CSA TRACE" },
1073 { 0x012b, "NetwareSAA" },
1074 { 0x012e, "IKARUS VirusScan" },
1075 { 0x0130, "CommunicationsExecutive" },
1076 { 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
1077 { 0x0135, "NetwareNamingServicesProfile" },
1078 { 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
1079 { 0x0141, "LAN SpoolServer" },
1080 { 0x0152, "IRMALAN Gateway" },
1081 { 0x0154, "NamedPipeServer" },
1082 { 0x0166, "NetWareManagement" },
1083 { 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
1084 { 0x0173, "Compaq" },
1085 { 0x0174, "Compaq SNMP Agent" },
1086 { 0x0175, "Compaq" },
1087 { 0x0180, "XTreeServer/XTreeTools" },
1088 { 0x018A, "NASI ServicesBroadcastServer" },
1089 { 0x01b0, "GARP Gateway" },
1090 { 0x01b1, "Binfview" },
1091 { 0x01bf, "IntelLanDeskManager" },
1092 { 0x01ca, "AXTEC" },
1093 { 0x01cb, "ShivaNetModem/E" },
1094 { 0x01cc, "ShivaLanRover/E" },
1095 { 0x01cd, "ShivaLanRover/T" },
1096 { 0x01ce, "ShivaUniversal" },
1097 { 0x01d8, "CastelleFAXPressServer" },
1098 { 0x01da, "CastelleLANPressPrintServer" },
1099 { 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
1100 { 0x01f0, "LEGATO" },
1101 { 0x01f5, "LEGATO" },
1102 { 0x0233, "NMS Agent/NetwareManagementAgent" },
1103 { 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
1104 { 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
1105 { 0x023a, "LANtern" },
1106 { 0x023c, "MAVERICK" },
1107 { 0x023f, "NovellSMDR" },
1108 { 0x024e, "NetwareConnect" },
1109 { 0x024f, "NASI ServerBroadcast Cisco" },
1110 { 0x026a, "NMS ServiceConsole" },
1111 { 0x026b, "TimeSynchronizationServer Netware 4.x" },
1112 { 0x0278, "DirectoryServer Netware 4.x" },
1113 { 0x027b, "NetwareManagementAgent" },
1114 { 0x0280, "Novell File and Printer Sharing Service for PC" },
1115 { 0x0304, "NovellSAA Gateway" },
1116 { 0x0308, "COM/VERMED" },
1117 { 0x030a, "GalacticommWorldgroupServer" },
1118 { 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
1119 { 0x0320, "AttachmateGateway" },
1120 { 0x0327, "MicrosoftDiagnostics" },
1121 { 0x0328, "WATCOM SQL Server" },
1122 { 0x0335, "MultiTechSystems MultisynchCommServer" },
1123 { 0x0343, "Xylogics RemoteAccessServer/LANModem" },
1124 { 0x0355, "ArcadaBackupExec" },
1125 { 0x0358, "MSLCD1" },
1126 { 0x0361, "NETINELO" },
1127 { 0x037e, "Powerchute UPS Monitoring" },
1128 { 0x037f, "ViruSafeNotify" },
1129 { 0x0386, "HP Bridge" },
1130 { 0x0387, "HP Hub" },
1131 { 0x0394, "NetWare SAA Gateway" },
1132 { 0x039b, "LotusNotes" },
1133 { 0x03b7, "CertusAntiVirus" },
1134 { 0x03c4, "ARCserve4.0" },
1135 { 0x03c7, "LANspool3.5" },
1136 { 0x03d7, "LexmarkPrinterServer" },
1137 { 0x03d8, "LexmarkXLE PrinterServer" },
1138 { 0x03dd, "BanyanENS NetwareClient" },
1139 { 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
1140 { 0x03e1, "UnivelUnixware" },
1141 { 0x03e4, "UnivelUnixware" },
1142 { 0x03fc, "IntelNetport" },
1143 { 0x03fd, "PrintServerQueue" },
1144 { 0x040A, "ipnServer" },
1145 { 0x040D, "LVERRMAN" },
1146 { 0x040E, "LVLIC" },
1147 { 0x0414, "NET Silicon (DPI)/Kyocera" },
1148 { 0x0429, "SiteLockVirus" },
1149 { 0x0432, "UFHELPR???" },
1150 { 0x0433, "Synoptics281xAdvancedSNMPAgent" },
1151 { 0x0444, "MicrosoftNT SNA Server" },
1152 { 0x0448, "Oracle" },
1153 { 0x044c, "ARCserve5.01" },
1154 { 0x0457, "CanonGP55" },
1155 { 0x045a, "QMS Printers" },
1156 { 0x045b, "DellSCSI Array" },
1157 { 0x0491, "NetBlazerModems" },
1158 { 0x04ac, "OnTimeScheduler" },
1159 { 0x04b0, "CD-Net" },
1160 { 0x0513, "EmulexNQA" },
1161 { 0x0520, "SiteLockChecks" },
1162 { 0x0529, "SiteLockChecks" },
1163 { 0x052d, "CitrixOS2 AppServer" },
1164 { 0x0535, "Tektronix" },
1165 { 0x0536, "Milan" },
1166 { 0x055d, "Attachmate SNA gateway" },
1167 { 0x056b, "IBM8235 ModemServer" },
1168 { 0x056c, "ShivaLanRover/E PLUS" },
1169 { 0x056d, "ShivaLanRover/T PLUS" },
1170 { 0x0580, "McAfeeNetShield" },
1171 { 0x05B8, "NLM to workstation communication (Revelation Software)" },
1172 { 0x05BA, "CompatibleSystemsRouters" },
1173 { 0x05BE, "CheyenneHierarchicalStorageManager" },
1174 { 0x0606, "JCWatermarkImaging" },
1175 { 0x060c, "AXISNetworkPrinter" },
1176 { 0x0610, "AdaptecSCSIManagement" },
1177 { 0x0621, "IBM AntiVirus" },
1178 { 0x0640, "Windows95 RemoteRegistryService" },
1179 { 0x064e, "MicrosoftIIS" },
1180 { 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1181 { 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
1182 { 0x076C, "Xerox" },
1183 { 0x079b, "ShivaLanRover/E 115" },
1184 { 0x079c, "ShivaLanRover/T 115" },
1185 { 0x07B4, "CubixWorldDesk" },
1186 { 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
1187 { 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
1188 { 0x0810, "ELAN License Server Demo" },
1189 { 0x0824, "ShivaLanRoverAccessSwitch/E" },
1190 { 0x086a, "ISSC Collector" },
1191 { 0x087f, "ISSC DAS AgentAIX" },
1192 { 0x0880, "Intel Netport PRO" },
1193 { 0x0881, "Intel Netport PRO" },
1194 { 0x0b29, "SiteLock" },
1195 { 0x0c29, "SiteLockApplications" },
1196 { 0x0c2c, "LicensingServer" },
1197 { 0x2101, "PerformanceTechnologyInstantInternet" },
1198 { 0x2380, "LAI SiteLock" },
1199 { 0x238c, "MeetingMaker" },
1200 { 0x4808, "SiteLockServer/SiteLockMetering" },
1201 { 0x5555, "SiteLockUser" },
1202 { 0x6312, "Tapeware" },
1203 { 0x6f00, "RabbitGateway" },
1204 { 0x7703, "MODEM" },
1205 { 0x8002, "NetPortPrinters" },
1206 { 0x8008, "WordPerfectNetworkVersion" },
1207 { 0x85BE, "Cisco EIGRP" },
1208 { 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
1209 { 0x9000, "McAfeeNetShield" },
1210 { 0x9604, "CSA-NT_MON" },
1211 { 0xb6a8, "OceanIsleReachoutRemoteControl" },
1212 { 0xf11f, "SiteLockMetering" },
1213 { 0xf1ff, "SiteLock" },
1214 { 0xf503, "Microsoft SQL Server" },
1215 { 0xF905, "IBM TimeAndPlace" },
1216 { 0xfbfb, "TopCallIII FaxServer" },
1217 { 0xffff, "AnyService/Wildcard" },
1218 { 0, (char *)0 }
1219 };
1220
1221 static void
init_ipxsaparray(netdissect_options * ndo)1222 init_ipxsaparray(netdissect_options *ndo)
1223 {
1224 int i;
1225 struct hnamemem *table;
1226
1227 for (i = 0; ipxsap_db[i].s != NULL; i++) {
1228 u_int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
1229 table = &ipxsaptable[j];
1230 while (table->name)
1231 table = table->nxt;
1232 table->name = ipxsap_db[i].s;
1233 table->addr = htons(ipxsap_db[i].v);
1234 table->nxt = newhnamemem(ndo);
1235 }
1236 }
1237
1238 /*
1239 * Initialize the address to name translation machinery. We map all
1240 * non-local IP addresses to numeric addresses if ndo->ndo_fflag is true
1241 * (i.e., to prevent blocking on the nameserver). localnet is the IP address
1242 * of the local network. mask is its subnet mask.
1243 */
1244 void
init_addrtoname(netdissect_options * ndo,uint32_t localnet,uint32_t mask)1245 init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask)
1246 {
1247 if (ndo->ndo_fflag) {
1248 f_localnet = localnet;
1249 f_netmask = mask;
1250 }
1251 if (ndo->ndo_nflag)
1252 /*
1253 * Simplest way to suppress names.
1254 */
1255 return;
1256
1257 init_etherarray(ndo);
1258 init_servarray(ndo);
1259 init_eprotoarray(ndo);
1260 init_protoidarray(ndo);
1261 init_ipxsaparray(ndo);
1262 }
1263
1264 const char *
dnaddr_string(netdissect_options * ndo,u_short dnaddr)1265 dnaddr_string(netdissect_options *ndo, u_short dnaddr)
1266 {
1267 struct hnamemem *tp;
1268
1269 for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL;
1270 tp = tp->nxt)
1271 if (tp->addr == dnaddr)
1272 return (tp->name);
1273
1274 tp->addr = dnaddr;
1275 tp->nxt = newhnamemem(ndo);
1276 tp->name = dnnum_string(ndo, dnaddr);
1277
1278 return(tp->name);
1279 }
1280
1281 /* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
1282 struct hnamemem *
newhnamemem(netdissect_options * ndo)1283 newhnamemem(netdissect_options *ndo)
1284 {
1285 struct hnamemem *p;
1286 static struct hnamemem *ptr = NULL;
1287 static u_int num = 0;
1288
1289 if (num == 0) {
1290 num = 64;
1291 ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
1292 if (ptr == NULL)
1293 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
1294 "%s: calloc", __func__);
1295 }
1296 --num;
1297 p = ptr++;
1298 return (p);
1299 }
1300
1301 /* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
1302 struct h6namemem *
newh6namemem(netdissect_options * ndo)1303 newh6namemem(netdissect_options *ndo)
1304 {
1305 struct h6namemem *p;
1306 static struct h6namemem *ptr = NULL;
1307 static u_int num = 0;
1308
1309 if (num == 0) {
1310 num = 64;
1311 ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
1312 if (ptr == NULL)
1313 (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
1314 "%s: calloc", __func__);
1315 }
1316 --num;
1317 p = ptr++;
1318 return (p);
1319 }
1320
1321 /* Represent TCI part of the 802.1Q 4-octet tag as text. */
1322 const char *
ieee8021q_tci_string(const uint16_t tci)1323 ieee8021q_tci_string(const uint16_t tci)
1324 {
1325 static char buf[128];
1326 snprintf(buf, sizeof(buf), "vlan %u, p %u%s",
1327 tci & 0xfff,
1328 tci >> 13,
1329 (tci & 0x1000) ? ", DEI" : "");
1330 return buf;
1331 }
1332