Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-fr.c
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1/*
2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
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
22#ifndef lint
23static const char rcsid[] _U_ =
24 "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.32.2.15 2006/02/01 14:39:56 hannes Exp $ (LBL)";
25#endif
26
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#include <tcpdump-stdinc.h>
32
33#include <stdio.h>
34#include <string.h>
35#include <pcap.h>
36
37#include "addrtoname.h"
38#include "interface.h"
39#include "ethertype.h"
40#include "nlpid.h"
41#include "extract.h"
42#include "oui.h"
43
44static void frf15_print(const u_char *, u_int);
45
46/*
47 * the frame relay header has a variable length
48 *
49 * the EA bit determines if there is another byte
50 * in the header
51 *
52 * minimum header length is 2 bytes
53 * maximum header length is 4 bytes
54 *
55 * 7 6 5 4 3 2 1 0
56 * +----+----+----+----+----+----+----+----+
57 * | DLCI (6 bits) | CR | EA |
58 * +----+----+----+----+----+----+----+----+
59 * | DLCI (4 bits) |FECN|BECN| DE | EA |
60 * +----+----+----+----+----+----+----+----+
61 * | DLCI (7 bits) | EA |
62 * +----+----+----+----+----+----+----+----+
63 * | DLCI (6 bits) |SDLC| EA |
64 * +----+----+----+----+----+----+----+----+
65 */
66
67#define FR_EA_BIT 0x01
68
69#define FR_CR_BIT 0x02000000
70#define FR_DE_BIT 0x00020000
71#define FR_BECN_BIT 0x00040000
72#define FR_FECN_BIT 0x00080000
73#define FR_SDLC_BIT 0x00000002
74
75
76struct tok fr_header_flag_values[] = {
77 { FR_CR_BIT, "C!" },
78 { FR_DE_BIT, "DE" },
79 { FR_BECN_BIT, "BECN" },
80 { FR_FECN_BIT, "FECN" },
81 { FR_SDLC_BIT, "sdlcore" },
82 { 0, NULL }
83};
84
85/* FRF.15 / FRF.16 */
86#define MFR_B_BIT 0x80
87#define MFR_E_BIT 0x40
88#define MFR_C_BIT 0x20
89#define MFR_BEC_MASK (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT)
90#define MFR_CTRL_FRAME (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT)
91#define MFR_FRAG_FRAME (MFR_B_BIT | MFR_E_BIT )
92
93struct tok frf_flag_values[] = {
94 { MFR_B_BIT, "Begin" },
95 { MFR_E_BIT, "End" },
96 { MFR_C_BIT, "Control" },
97 { 0, NULL }
98};
99
100/* Finds out Q.922 address length, DLCI and flags. Returns 0 on success
101 * save the flags dep. on address length
102 */
103static int parse_q922_addr(const u_char *p, u_int *dlci, u_int *sdlcore,
104 u_int *addr_len, u_int8_t *flags)
105{
106 if ((p[0] & FR_EA_BIT))
107 return -1;
108
109 *addr_len = 2;
110 *dlci = ((p[0] & 0xFC) << 2) | ((p[1] & 0xF0) >> 4);
111
112 flags[0] = p[0] & 0x02; /* populate the first flag fields */
113 flags[1] = p[1] & 0x0c;
114 flags[2] = 0; /* clear the rest of the flags */
115 flags[3] = 0;
116
117 if (p[1] & FR_EA_BIT)
118 return 0; /* 2-byte Q.922 address */
119
120 p += 2;
121 (*addr_len)++; /* 3- or 4-byte Q.922 address */
122 if ((p[0] & FR_EA_BIT) == 0) {
123 *dlci = (*dlci << 7) | (p[0] >> 1);
124 (*addr_len)++; /* 4-byte Q.922 address */
125 p++;
126 }
127
128 if ((p[0] & FR_EA_BIT) == 0)
129 return -1; /* more than 4 bytes of Q.922 address? */
130
131 flags[3] = p[0] & 0x02;
132
133 if (p[0] & 0x02)
134 *sdlcore = p[0] >> 2;
135 else
136 *dlci = (*dlci << 6) | (p[0] >> 2);
137
138 return 0;
139}
140
141/* Frame Relay packet structure, with flags and CRC removed
142
143 +---------------------------+
144 | Q.922 Address* |
145 +-- --+
146 | |
147 +---------------------------+
148 | Control (UI = 0x03) |
149 +---------------------------+
150 | Optional Pad (0x00) |
151 +---------------------------+
152 | NLPID |
153 +---------------------------+
154 | . |
155 | . |
156 | . |
157 | Data |
158 | . |
159 | . |
160 +---------------------------+
161
162 * Q.922 addresses, as presently defined, are two octets and
163 contain a 10-bit DLCI. In some networks Q.922 addresses
164 may optionally be increased to three or four octets.
165*/
166
167static u_int
168fr_hdrlen(const u_char *p, u_int addr_len)
169{
170 if (!p[addr_len + 1] /* pad exist */)
171 return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */;
172 else
173 return addr_len + 1 /* UI */ + 1 /* NLPID */;
174}
175
176static void
177fr_hdr_print(int length, u_int addr_len, u_int dlci, u_int8_t *flags, u_int16_t nlpid)
178{
179 if (qflag) {
180 (void)printf("Q.922, DLCI %u, length %u: ",
181 dlci,
182 length);
183 } else {
184 if (nlpid <= 0xff) /* if its smaller than 256 then its a NLPID */
185 (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], NLPID %s (0x%02x), length %u: ",
186 addr_len,
187 dlci,
188 bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
189 tok2str(nlpid_values,"unknown", nlpid),
190 nlpid,
191 length);
192 else /* must be an ethertype */
193 (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ",
194 addr_len,
195 dlci,
196 bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
197 tok2str(ethertype_values, "unknown", nlpid),
198 nlpid,
199 length);
200 }
201}
202
203u_int
204fr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
205{
206 register u_int length = h->len;
207 register u_int caplen = h->caplen;
208
209 TCHECK2(*p, 4); /* minimum frame header length */
210
211 if ((length = fr_print(p, length)) == 0)
212 return (0);
213 else
214 return length;
215 trunc:
216 printf("[|fr]");
217 return caplen;
218}
219
220u_int
221fr_print(register const u_char *p, u_int length)
222{
223 u_int16_t extracted_ethertype;
224 u_int dlci;
225 u_int sdlcore;
226 u_int addr_len;
227 u_int16_t nlpid;
228 u_int hdr_len;
229 u_int8_t flags[4];
230
231 if (parse_q922_addr(p, &dlci, &sdlcore, &addr_len, flags)) {
232 printf("Q.922, invalid address");
233 return 0;
234 }
235
236 TCHECK2(*p,addr_len+1+1);
237 hdr_len = fr_hdrlen(p, addr_len);
238 TCHECK2(*p,hdr_len);
239
240 if (p[addr_len] != 0x03 && dlci != 0) {
241
242 /* lets figure out if we have cisco style encapsulation: */
243 extracted_ethertype = EXTRACT_16BITS(p+addr_len);
244
245 if (eflag)
246 fr_hdr_print(length, addr_len, dlci, flags, extracted_ethertype);
247
248 if (ether_encap_print(extracted_ethertype,
249 p+addr_len+ETHERTYPE_LEN,
250 length-addr_len-ETHERTYPE_LEN,
251 length-addr_len-ETHERTYPE_LEN,
252 &extracted_ethertype) == 0)
253 /* ether_type not known, probably it wasn't one */
254 printf("UI %02x! ", p[addr_len]);
255 else
256 return hdr_len;
257 }
258
259 if (!p[addr_len + 1]) { /* pad byte should be used with 3-byte Q.922 */
260 if (addr_len != 3)
261 printf("Pad! ");
262 } else if (addr_len == 3)
263 printf("No pad! ");
264
265 nlpid = p[hdr_len - 1];
266
267 if (eflag)
268 fr_hdr_print(length, addr_len, dlci, flags, nlpid);
269 p += hdr_len;
270 length -= hdr_len;
271
272 switch (nlpid) {
273 case NLPID_IP:
274 ip_print(gndo, p, length);
275 break;
276
277#ifdef INET6
278 case NLPID_IP6:
279 ip6_print(p, length);
280 break;
281#endif
282 case NLPID_CLNP:
283 case NLPID_ESIS:
284 case NLPID_ISIS:
285 isoclns_print(p-1, length+1, length+1); /* OSI printers need the NLPID field */
286 break;
287
288 case NLPID_SNAP:
289 if (snap_print(p, length, length, &extracted_ethertype, 0) == 0) {
290 /* ether_type not known, print raw packet */
291 if (!eflag)
292 fr_hdr_print(length + hdr_len, hdr_len,
293 dlci, flags, nlpid);
294 if (!suppress_default_print)
295 default_print(p - hdr_len, length + hdr_len);
296 }
297 break;
298
299 case NLPID_Q933:
300 q933_print(p, length);
301 break;
302
303 case NLPID_MFR:
304 frf15_print(p, length);
305 break;
306
307 case NLPID_PPP:
308 ppp_print(p, length);
309 break;
310
311 default:
312 if (!eflag)
313 fr_hdr_print(length + hdr_len, addr_len,
314 dlci, flags, nlpid);
315 if (!xflag)
316 default_print(p, length);
317 }
318
319 return hdr_len;
320
321 trunc:
322 printf("[|fr]");
323 return 0;
324
325}
326
327u_int
328mfr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
329{
330 register u_int length = h->len;
331 register u_int caplen = h->caplen;
332
333 TCHECK2(*p, 2); /* minimum frame header length */
334
335 if ((length = mfr_print(p, length)) == 0)
336 return (0);
337 else
338 return length;
339 trunc:
340 printf("[|mfr]");
341 return caplen;
342}
343
344
345#define MFR_CTRL_MSG_ADD_LINK 1
346#define MFR_CTRL_MSG_ADD_LINK_ACK 2
347#define MFR_CTRL_MSG_ADD_LINK_REJ 3
348#define MFR_CTRL_MSG_HELLO 4
349#define MFR_CTRL_MSG_HELLO_ACK 5
350#define MFR_CTRL_MSG_REMOVE_LINK 6
351#define MFR_CTRL_MSG_REMOVE_LINK_ACK 7
352
353struct tok mfr_ctrl_msg_values[] = {
354 { MFR_CTRL_MSG_ADD_LINK, "Add Link" },
355 { MFR_CTRL_MSG_ADD_LINK_ACK, "Add Link ACK" },
356 { MFR_CTRL_MSG_ADD_LINK_REJ, "Add Link Reject" },
357 { MFR_CTRL_MSG_HELLO, "Hello" },
358 { MFR_CTRL_MSG_HELLO_ACK, "Hello ACK" },
359 { MFR_CTRL_MSG_REMOVE_LINK, "Remove Link" },
360 { MFR_CTRL_MSG_REMOVE_LINK_ACK, "Remove Link ACK" },
361 { 0, NULL }
362};
363
364#define MFR_CTRL_IE_BUNDLE_ID 1
365#define MFR_CTRL_IE_LINK_ID 2
366#define MFR_CTRL_IE_MAGIC_NUM 3
367#define MFR_CTRL_IE_TIMESTAMP 5
368#define MFR_CTRL_IE_VENDOR_EXT 6
369#define MFR_CTRL_IE_CAUSE 7
370
371struct tok mfr_ctrl_ie_values[] = {
372 { MFR_CTRL_IE_BUNDLE_ID, "Bundle ID"},
373 { MFR_CTRL_IE_LINK_ID, "Link ID"},
374 { MFR_CTRL_IE_MAGIC_NUM, "Magic Number"},
375 { MFR_CTRL_IE_TIMESTAMP, "Timestamp"},
376 { MFR_CTRL_IE_VENDOR_EXT, "Vendor Extension"},
377 { MFR_CTRL_IE_CAUSE, "Cause"},
378 { 0, NULL }
379};
380
381#define MFR_ID_STRING_MAXLEN 50
382
383struct ie_tlv_header_t {
384 u_int8_t ie_type;
385 u_int8_t ie_len;
386};
387
388u_int
389mfr_print(register const u_char *p, u_int length)
390{
391 u_int tlen,idx,hdr_len = 0;
392 u_int16_t sequence_num;
393 u_int8_t ie_type,ie_len;
394 const u_int8_t *tptr;
395
396
397/*
398 * FRF.16 Link Integrity Control Frame
399 *
400 * 7 6 5 4 3 2 1 0
401 * +----+----+----+----+----+----+----+----+
402 * | B | E | C=1| 0 0 0 0 | EA |
403 * +----+----+----+----+----+----+----+----+
404 * | 0 0 0 0 0 0 0 0 |
405 * +----+----+----+----+----+----+----+----+
406 * | message type |
407 * +----+----+----+----+----+----+----+----+
408 */
409
410 TCHECK2(*p, 4); /* minimum frame header length */
411
412 if ((p[0] & MFR_BEC_MASK) == MFR_CTRL_FRAME && p[1] == 0) {
413 printf("FRF.16 Control, Flags [%s], %s, length %u",
414 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)),
415 tok2str(mfr_ctrl_msg_values,"Unknown Message (0x%02x)",p[2]),
416 length);
417 tptr = p + 3;
418 tlen = length -3;
419 hdr_len = 3;
420
421 if (!vflag)
422 return hdr_len;
423
424 while (tlen>sizeof(struct ie_tlv_header_t)) {
425 TCHECK2(*tptr, sizeof(struct ie_tlv_header_t));
426 ie_type=tptr[0];
427 ie_len=tptr[1];
428
429 printf("\n\tIE %s (%u), length %u: ",
430 tok2str(mfr_ctrl_ie_values,"Unknown",ie_type),
431 ie_type,
432 ie_len);
433
434 /* infinite loop check */
435 if (ie_type == 0 || ie_len <= sizeof(struct ie_tlv_header_t))
436 return hdr_len;
437
438 TCHECK2(*tptr,ie_len);
439 tptr+=sizeof(struct ie_tlv_header_t);
440 /* tlv len includes header */
441 ie_len-=sizeof(struct ie_tlv_header_t);
442 tlen-=sizeof(struct ie_tlv_header_t);
443
444 switch (ie_type) {
445
446 case MFR_CTRL_IE_MAGIC_NUM:
447 printf("0x%08x",EXTRACT_32BITS(tptr));
448 break;
449
450 case MFR_CTRL_IE_BUNDLE_ID: /* same message format */
451 case MFR_CTRL_IE_LINK_ID:
452 for (idx = 0; idx < ie_len && idx < MFR_ID_STRING_MAXLEN; idx++) {
453 if (*(tptr+idx) != 0) /* don't print null termination */
454 safeputchar(*(tptr+idx));
455 else
456 break;
457 }
458 break;
459
460 case MFR_CTRL_IE_TIMESTAMP:
461 if (ie_len == sizeof(struct timeval)) {
462 ts_print((const struct timeval *)tptr);
463 break;
464 }
465 /* fall through and hexdump if no unix timestamp */
466
467 /*
468 * FIXME those are the defined IEs that lack a decoder
469 * you are welcome to contribute code ;-)
470 */
471
472 case MFR_CTRL_IE_VENDOR_EXT:
473 case MFR_CTRL_IE_CAUSE:
474
475 default:
476 if (vflag <= 1)
477 print_unknown_data(tptr,"\n\t ",ie_len);
478 break;
479 }
480
481 /* do we want to see a hexdump of the IE ? */
482 if (vflag > 1 )
483 print_unknown_data(tptr,"\n\t ",ie_len);
484
485 tlen-=ie_len;
486 tptr+=ie_len;
487 }
488 return hdr_len;
489 }
490/*
491 * FRF.16 Fragmentation Frame
492 *
493 * 7 6 5 4 3 2 1 0
494 * +----+----+----+----+----+----+----+----+
495 * | B | E | C=0|seq. (high 4 bits) | EA |
496 * +----+----+----+----+----+----+----+----+
497 * | sequence (low 8 bits) |
498 * +----+----+----+----+----+----+----+----+
499 * | DLCI (6 bits) | CR | EA |
500 * +----+----+----+----+----+----+----+----+
501 * | DLCI (4 bits) |FECN|BECN| DE | EA |
502 * +----+----+----+----+----+----+----+----+
503 */
504
505 sequence_num = (p[0]&0x1e)<<7 | p[1];
506 /* whole packet or first fragment ? */
507 if ((p[0] & MFR_BEC_MASK) == MFR_FRAG_FRAME ||
508 (p[0] & MFR_BEC_MASK) == MFR_B_BIT) {
509 printf("FRF.16 Frag, seq %u, Flags [%s], ",
510 sequence_num,
511 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
512 hdr_len = 2;
513 fr_print(p+hdr_len,length-hdr_len);
514 return hdr_len;
515 }
516
517 /* must be a middle or the last fragment */
518 printf("FRF.16 Frag, seq %u, Flags [%s]",
519 sequence_num,
520 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
521 print_unknown_data(p,"\n\t",length);
522
523 return hdr_len;
524
525 trunc:
526 printf("[|mfr]");
527 return length;
528}
529
530/* an NLPID of 0xb1 indicates a 2-byte
531 * FRF.15 header
532 *
533 * 7 6 5 4 3 2 1 0
534 * +----+----+----+----+----+----+----+----+
535 * ~ Q.922 header ~
536 * +----+----+----+----+----+----+----+----+
537 * | NLPID (8 bits) | NLPID=0xb1
538 * +----+----+----+----+----+----+----+----+
539 * | B | E | C |seq. (high 4 bits) | R |
540 * +----+----+----+----+----+----+----+----+
541 * | sequence (low 8 bits) |
542 * +----+----+----+----+----+----+----+----+
543 */
544
545#define FR_FRF15_FRAGTYPE 0x01
546
547static void
548frf15_print (const u_char *p, u_int length) {
549
550 u_int16_t sequence_num, flags;
551
552 flags = p[0]&MFR_BEC_MASK;
553 sequence_num = (p[0]&0x1e)<<7 | p[1];
554
555 printf("FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u",
556 sequence_num,
557 bittok2str(frf_flag_values,"none",flags),
558 p[0]&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End",
559 length);
560
561/* TODO:
562 * depending on all permutations of the B, E and C bit
563 * dig as deep as we can - e.g. on the first (B) fragment
564 * there is enough payload to print the IP header
565 * on non (B) fragments it depends if the fragmentation
566 * model is end-to-end or interface based wether we want to print
567 * another Q.922 header
568 */
569
570}
571
572/*
573 * Q.933 decoding portion for framerelay specific.
574 */
575
576/* Q.933 packet format
577 Format of Other Protocols
578 using Q.933 NLPID
579 +-------------------------------+
580 | Q.922 Address |
581 +---------------+---------------+
582 |Control 0x03 | NLPID 0x08 |
583 +---------------+---------------+
584 | L2 Protocol ID |
585 | octet 1 | octet 2 |
586 +-------------------------------+
587 | L3 Protocol ID |
588 | octet 2 | octet 2 |
589 +-------------------------------+
590 | Protocol Data |
591 +-------------------------------+
592 | FCS |
593 +-------------------------------+
594 */
595
596/* L2 (Octet 1)- Call Reference Usually is 0x0 */
597
598/*
599 * L2 (Octet 2)- Message Types definition 1 byte long.
600 */
601/* Call Establish */
602#define MSG_TYPE_ESC_TO_NATIONAL 0x00
603#define MSG_TYPE_ALERT 0x01
604#define MSG_TYPE_CALL_PROCEEDING 0x02
605#define MSG_TYPE_CONNECT 0x07
606#define MSG_TYPE_CONNECT_ACK 0x0F
607#define MSG_TYPE_PROGRESS 0x03
608#define MSG_TYPE_SETUP 0x05
609/* Call Clear */
610#define MSG_TYPE_DISCONNECT 0x45
611#define MSG_TYPE_RELEASE 0x4D
612#define MSG_TYPE_RELEASE_COMPLETE 0x5A
613#define MSG_TYPE_RESTART 0x46
614#define MSG_TYPE_RESTART_ACK 0x4E
615/* Status */
616#define MSG_TYPE_STATUS 0x7D
617#define MSG_TYPE_STATUS_ENQ 0x75
618
619struct tok fr_q933_msg_values[] = {
620 { MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" },
621 { MSG_TYPE_ALERT, "Alert" },
622 { MSG_TYPE_CALL_PROCEEDING, "Call proceeding" },
623 { MSG_TYPE_CONNECT, "Connect" },
624 { MSG_TYPE_CONNECT_ACK, "Connect ACK" },
625 { MSG_TYPE_PROGRESS, "Progress" },
626 { MSG_TYPE_SETUP, "Setup" },
627 { MSG_TYPE_DISCONNECT, "Disconnect" },
628 { MSG_TYPE_RELEASE, "Release" },
629 { MSG_TYPE_RELEASE_COMPLETE, "Release Complete" },
630 { MSG_TYPE_RESTART, "Restart" },
631 { MSG_TYPE_RESTART_ACK, "Restart ACK" },
632 { MSG_TYPE_STATUS, "Status Reply" },
633 { MSG_TYPE_STATUS_ENQ, "Status Enquiry" },
634 { 0, NULL }
635};
636
637#define MSG_ANSI_LOCKING_SHIFT 0x95
638
639#define FR_LMI_ANSI_REPORT_TYPE_IE 0x01
640#define FR_LMI_ANSI_LINK_VERIFY_IE_91 0x19 /* details? */
641#define FR_LMI_ANSI_LINK_VERIFY_IE 0x03
642#define FR_LMI_ANSI_PVC_STATUS_IE 0x07
643
644#define FR_LMI_CCITT_REPORT_TYPE_IE 0x51
645#define FR_LMI_CCITT_LINK_VERIFY_IE 0x53
646#define FR_LMI_CCITT_PVC_STATUS_IE 0x57
647
648struct tok fr_q933_ie_values_codeset5[] = {
649 { FR_LMI_ANSI_REPORT_TYPE_IE, "ANSI Report Type" },
650 { FR_LMI_ANSI_LINK_VERIFY_IE_91, "ANSI Link Verify" },
651 { FR_LMI_ANSI_LINK_VERIFY_IE, "ANSI Link Verify" },
652 { FR_LMI_ANSI_PVC_STATUS_IE, "ANSI PVC Status" },
653 { FR_LMI_CCITT_REPORT_TYPE_IE, "CCITT Report Type" },
654 { FR_LMI_CCITT_LINK_VERIFY_IE, "CCITT Link Verify" },
655 { FR_LMI_CCITT_PVC_STATUS_IE, "CCITT PVC Status" },
656 { 0, NULL }
657};
658
659#define FR_LMI_REPORT_TYPE_IE_FULL_STATUS 0
660#define FR_LMI_REPORT_TYPE_IE_LINK_VERIFY 1
661#define FR_LMI_REPORT_TYPE_IE_ASYNC_PVC 2
662
663struct tok fr_lmi_report_type_ie_values[] = {
664 { FR_LMI_REPORT_TYPE_IE_FULL_STATUS, "Full Status" },
665 { FR_LMI_REPORT_TYPE_IE_LINK_VERIFY, "Link verify" },
666 { FR_LMI_REPORT_TYPE_IE_ASYNC_PVC, "Async PVC Status" },
667 { 0, NULL }
668};
669
670/* array of 16 codepages - currently we only support codepage 1,5 */
671static struct tok *fr_q933_ie_codesets[] = {
672 NULL,
673 fr_q933_ie_values_codeset5,
674 NULL,
675 NULL,
676 NULL,
677 fr_q933_ie_values_codeset5,
678 NULL,
679 NULL,
680 NULL,
681 NULL,
682 NULL,
683 NULL,
684 NULL,
685 NULL,
686 NULL,
687 NULL
688};
689
690static int fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p,
691 const u_char *p);
692
693typedef int (*codeset_pr_func_t)(const struct ie_tlv_header_t *ie_p,
694 const u_char *p);
695
696/* array of 16 codepages - currently we only support codepage 1,5 */
697static codeset_pr_func_t fr_q933_print_ie_codeset[] = {
698 NULL,
699 fr_q933_print_ie_codeset5,
700 NULL,
701 NULL,
702 NULL,
703 fr_q933_print_ie_codeset5,
704 NULL,
705 NULL,
706 NULL,
707 NULL,
708 NULL,
709 NULL,
710 NULL,
711 NULL,
712 NULL,
713 NULL
714};
715
716void
717q933_print(const u_char *p, u_int length)
718{
719 const u_char *ptemp = p;
720 struct ie_tlv_header_t *ie_p;
721 int olen;
722 int is_ansi = 0;
723 u_int codeset;
724 u_int ie_is_known = 0;
725
726 if (length < 9) { /* shortest: Q.933a LINK VERIFY */
727 printf("[|q.933]");
728 return;
729 }
730
731 codeset = p[2]&0x0f; /* extract the codeset */
732
733 if (p[2] == MSG_ANSI_LOCKING_SHIFT)
734 is_ansi = 1;
735
736 printf("%s", eflag ? "" : "Q.933, ");
737
738 /* printing out header part */
739 printf("%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset);
740
741 if (p[0])
742 printf(", Call Ref: 0x%02x", p[0]);
743
744 if (vflag)
745 printf(", %s (0x%02x), length %u",
746 tok2str(fr_q933_msg_values,"unknown message",p[1]),
747 p[1],
748 length);
749 else
750 printf(", %s",
751 tok2str(fr_q933_msg_values,"unknown message 0x%02x",p[1]));
752
753 olen = length; /* preserve the original length for non verbose mode */
754
755 if (length < (u_int)(2 - is_ansi)) {
756 printf("[|q.933]");
757 return;
758 }
759 length -= 2 - is_ansi;
760 ptemp += 2 + is_ansi;
761
762 /* Loop through the rest of IE */
763 while (length > sizeof(struct ie_tlv_header_t )) {
764 ie_p = (struct ie_tlv_header_t *)ptemp;
765 if (length < sizeof(struct ie_tlv_header_t ) ||
766 length < sizeof(struct ie_tlv_header_t ) + ie_p->ie_len) {
767 if (vflag) /* not bark if there is just a trailer */
768 printf("\n[|q.933]");
769 else
770 printf(", length %u",olen);
771 return;
772 }
773
774 /* lets do the full IE parsing only in verbose mode
775 * however some IEs (DLCI Status, Link Verify)
776 * are also intereststing in non-verbose mode */
777 if (vflag)
778 printf("\n\t%s IE (0x%02x), length %u: ",
779 tok2str(fr_q933_ie_codesets[codeset],"unknown",ie_p->ie_type),
780 ie_p->ie_type,
781 ie_p->ie_len);
782
783 /* sanity check */
784 if (ie_p->ie_type == 0 || ie_p->ie_len == 0)
785 return;
786
787 if (fr_q933_print_ie_codeset[codeset] != NULL)
788 ie_is_known = fr_q933_print_ie_codeset[codeset](ie_p, ptemp);
789
790 if (vflag >= 1 && !ie_is_known)
791 print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len);
792
793 /* do we want to see a hexdump of the IE ? */
794 if (vflag> 1 && ie_is_known)
795 print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len);
796
797 length = length - ie_p->ie_len - 2;
798 ptemp = ptemp + ie_p->ie_len + 2;
799 }
800 if (!vflag)
801 printf(", length %u",olen);
802}
803
804static int
805fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p)
806{
807 u_int dlci;
808
809 switch (ie_p->ie_type) {
810
811 case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */
812 case FR_LMI_CCITT_REPORT_TYPE_IE:
813 if (vflag)
814 printf("%s (%u)",
815 tok2str(fr_lmi_report_type_ie_values,"unknown",p[2]),
816 p[2]);
817 return 1;
818
819 case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */
820 case FR_LMI_CCITT_LINK_VERIFY_IE:
821 case FR_LMI_ANSI_LINK_VERIFY_IE_91:
822 if (!vflag)
823 printf(", ");
824 printf("TX Seq: %3d, RX Seq: %3d", p[2], p[3]);
825 return 1;
826
827 case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */
828 case FR_LMI_CCITT_PVC_STATUS_IE:
829 if (!vflag)
830 printf(", ");
831 /* now parse the DLCI information element. */
832 if ((ie_p->ie_len < 3) ||
833 (p[2] & 0x80) ||
834 ((ie_p->ie_len == 3) && !(p[3] & 0x80)) ||
835 ((ie_p->ie_len == 4) && ((p[3] & 0x80) || !(p[4] & 0x80))) ||
836 ((ie_p->ie_len == 5) && ((p[3] & 0x80) || (p[4] & 0x80) ||
837 !(p[5] & 0x80))) ||
838 (ie_p->ie_len > 5) ||
839 !(p[ie_p->ie_len + 1] & 0x80))
840 printf("Invalid DLCI IE");
841
842 dlci = ((p[2] & 0x3F) << 4) | ((p[3] & 0x78) >> 3);
843 if (ie_p->ie_len == 4)
844 dlci = (dlci << 6) | ((p[4] & 0x7E) >> 1);
845 else if (ie_p->ie_len == 5)
846 dlci = (dlci << 13) | (p[4] & 0x7F) | ((p[5] & 0x7E) >> 1);
847
848 printf("DLCI %u: status %s%s", dlci,
849 p[ie_p->ie_len + 1] & 0x8 ? "New, " : "",
850 p[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive");
851 return 1;
852 }
853
854 return 0;
855}