2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
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
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.
23 static const char rcsid[] _U_ =
24 "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.51 2006-06-23 22:20:32 hannes Exp $ (LBL)";
31 #include <tcpdump-stdinc.h>
37 #include "addrtoname.h"
38 #include "interface.h"
39 #include "ethertype.h"
44 static void frf15_print(const u_char *, u_int);
47 * the frame relay header has a variable length
49 * the EA bit determines if there is another byte
52 * minimum header length is 2 bytes
53 * maximum header length is 4 bytes
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 * +----+----+----+----+----+----+----+----+
67 #define FR_EA_BIT 0x01
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
76 struct tok fr_header_flag_values[] = {
79 { FR_BECN_BIT, "BECN" },
80 { FR_FECN_BIT, "FECN" },
81 { FR_SDLC_BIT, "sdlcore" },
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 )
93 struct tok frf_flag_values[] = {
94 { MFR_B_BIT, "Begin" },
96 { MFR_C_BIT, "Control" },
100 /* Finds out Q.922 address length, DLCI and flags. Returns 0 on success
101 * save the flags dep. on address length
103 static int parse_q922_addr(const u_char *p, u_int *dlci,
104 u_int *addr_len, u_int8_t *flags)
106 if ((p[0] & FR_EA_BIT))
110 *dlci = ((p[0] & 0xFC) << 2) | ((p[1] & 0xF0) >> 4);
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 */
117 if (p[1] & FR_EA_BIT)
118 return 0; /* 2-byte Q.922 address */
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 */
128 if ((p[0] & FR_EA_BIT) == 0)
129 return -1; /* more than 4 bytes of Q.922 address? */
131 flags[3] = p[0] & 0x02;
133 *dlci = (*dlci << 6) | (p[0] >> 2);
138 char *q922_string(const u_char *p) {
140 static u_int dlci, addr_len;
141 static u_int8_t flags[4];
142 static char buffer[sizeof("DLCI xxxxxxxxxx")];
143 memset(buffer, 0, sizeof(buffer));
145 if (parse_q922_addr(p, &dlci, &addr_len, flags) == 0){
146 snprintf(buffer, sizeof(buffer), "DLCI %u", dlci);
153 /* Frame Relay packet structure, with flags and CRC removed
155 +---------------------------+
159 +---------------------------+
160 | Control (UI = 0x03) |
161 +---------------------------+
162 | Optional Pad (0x00) |
163 +---------------------------+
165 +---------------------------+
172 +---------------------------+
174 * Q.922 addresses, as presently defined, are two octets and
175 contain a 10-bit DLCI. In some networks Q.922 addresses
176 may optionally be increased to three or four octets.
180 fr_hdrlen(const u_char *p, u_int addr_len)
182 if (!p[addr_len + 1] /* pad exist */)
183 return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */;
185 return addr_len + 1 /* UI */ + 1 /* NLPID */;
189 fr_hdr_print(int length, u_int addr_len, u_int dlci, u_int8_t *flags, u_int16_t nlpid)
192 (void)printf("Q.922, DLCI %u, length %u: ",
196 if (nlpid <= 0xff) /* if its smaller than 256 then its a NLPID */
197 (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], NLPID %s (0x%02x), length %u: ",
200 bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
201 tok2str(nlpid_values,"unknown", nlpid),
204 else /* must be an ethertype */
205 (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ",
208 bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
209 tok2str(ethertype_values, "unknown", nlpid),
216 fr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
218 register u_int length = h->len;
219 register u_int caplen = h->caplen;
221 TCHECK2(*p, 4); /* minimum frame header length */
223 if ((length = fr_print(p, length)) == 0)
233 fr_print(register const u_char *p, u_int length)
235 u_int16_t extracted_ethertype;
242 if (parse_q922_addr(p, &dlci, &addr_len, flags)) {
243 printf("Q.922, invalid address");
247 TCHECK2(*p,addr_len+1+1);
248 hdr_len = fr_hdrlen(p, addr_len);
251 if (p[addr_len] != 0x03 && dlci != 0) {
253 /* lets figure out if we have cisco style encapsulation: */
254 extracted_ethertype = EXTRACT_16BITS(p+addr_len);
257 fr_hdr_print(length, addr_len, dlci, flags, extracted_ethertype);
259 if (ethertype_print(extracted_ethertype,
260 p+addr_len+ETHERTYPE_LEN,
261 length-addr_len-ETHERTYPE_LEN,
262 length-addr_len-ETHERTYPE_LEN) == 0)
263 /* ether_type not known, probably it wasn't one */
264 printf("UI %02x! ", p[addr_len]);
269 if (!p[addr_len + 1]) { /* pad byte should be used with 3-byte Q.922 */
272 } else if (addr_len == 3)
275 nlpid = p[hdr_len - 1];
278 fr_hdr_print(length, addr_len, dlci, flags, nlpid);
284 ip_print(gndo, p, length);
289 ip6_print(p, length);
295 isoclns_print(p-1, length+1, length+1); /* OSI printers need the NLPID field */
299 if (snap_print(p, length, length, 0) == 0) {
300 /* ether_type not known, print raw packet */
302 fr_hdr_print(length + hdr_len, hdr_len,
304 if (!suppress_default_print)
305 default_print(p - hdr_len, length + hdr_len);
310 q933_print(p, length);
314 frf15_print(p, length);
318 ppp_print(p, length);
323 fr_hdr_print(length + hdr_len, addr_len,
326 default_print(p, length);
338 mfr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
340 register u_int length = h->len;
341 register u_int caplen = h->caplen;
343 TCHECK2(*p, 2); /* minimum frame header length */
345 if ((length = mfr_print(p, length)) == 0)
355 #define MFR_CTRL_MSG_ADD_LINK 1
356 #define MFR_CTRL_MSG_ADD_LINK_ACK 2
357 #define MFR_CTRL_MSG_ADD_LINK_REJ 3
358 #define MFR_CTRL_MSG_HELLO 4
359 #define MFR_CTRL_MSG_HELLO_ACK 5
360 #define MFR_CTRL_MSG_REMOVE_LINK 6
361 #define MFR_CTRL_MSG_REMOVE_LINK_ACK 7
363 struct tok mfr_ctrl_msg_values[] = {
364 { MFR_CTRL_MSG_ADD_LINK, "Add Link" },
365 { MFR_CTRL_MSG_ADD_LINK_ACK, "Add Link ACK" },
366 { MFR_CTRL_MSG_ADD_LINK_REJ, "Add Link Reject" },
367 { MFR_CTRL_MSG_HELLO, "Hello" },
368 { MFR_CTRL_MSG_HELLO_ACK, "Hello ACK" },
369 { MFR_CTRL_MSG_REMOVE_LINK, "Remove Link" },
370 { MFR_CTRL_MSG_REMOVE_LINK_ACK, "Remove Link ACK" },
374 #define MFR_CTRL_IE_BUNDLE_ID 1
375 #define MFR_CTRL_IE_LINK_ID 2
376 #define MFR_CTRL_IE_MAGIC_NUM 3
377 #define MFR_CTRL_IE_TIMESTAMP 5
378 #define MFR_CTRL_IE_VENDOR_EXT 6
379 #define MFR_CTRL_IE_CAUSE 7
381 struct tok mfr_ctrl_ie_values[] = {
382 { MFR_CTRL_IE_BUNDLE_ID, "Bundle ID"},
383 { MFR_CTRL_IE_LINK_ID, "Link ID"},
384 { MFR_CTRL_IE_MAGIC_NUM, "Magic Number"},
385 { MFR_CTRL_IE_TIMESTAMP, "Timestamp"},
386 { MFR_CTRL_IE_VENDOR_EXT, "Vendor Extension"},
387 { MFR_CTRL_IE_CAUSE, "Cause"},
391 #define MFR_ID_STRING_MAXLEN 50
393 struct ie_tlv_header_t {
399 mfr_print(register const u_char *p, u_int length)
401 u_int tlen,idx,hdr_len = 0;
402 u_int16_t sequence_num;
403 u_int8_t ie_type,ie_len;
404 const u_int8_t *tptr;
408 * FRF.16 Link Integrity Control Frame
411 * +----+----+----+----+----+----+----+----+
412 * | B | E | C=1| 0 0 0 0 | EA |
413 * +----+----+----+----+----+----+----+----+
414 * | 0 0 0 0 0 0 0 0 |
415 * +----+----+----+----+----+----+----+----+
417 * +----+----+----+----+----+----+----+----+
420 TCHECK2(*p, 4); /* minimum frame header length */
422 if ((p[0] & MFR_BEC_MASK) == MFR_CTRL_FRAME && p[1] == 0) {
423 printf("FRF.16 Control, Flags [%s], %s, length %u",
424 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)),
425 tok2str(mfr_ctrl_msg_values,"Unknown Message (0x%02x)",p[2]),
434 while (tlen>sizeof(struct ie_tlv_header_t)) {
435 TCHECK2(*tptr, sizeof(struct ie_tlv_header_t));
439 printf("\n\tIE %s (%u), length %u: ",
440 tok2str(mfr_ctrl_ie_values,"Unknown",ie_type),
444 /* infinite loop check */
445 if (ie_type == 0 || ie_len <= sizeof(struct ie_tlv_header_t))
448 TCHECK2(*tptr,ie_len);
449 tptr+=sizeof(struct ie_tlv_header_t);
450 /* tlv len includes header */
451 ie_len-=sizeof(struct ie_tlv_header_t);
452 tlen-=sizeof(struct ie_tlv_header_t);
456 case MFR_CTRL_IE_MAGIC_NUM:
457 printf("0x%08x",EXTRACT_32BITS(tptr));
460 case MFR_CTRL_IE_BUNDLE_ID: /* same message format */
461 case MFR_CTRL_IE_LINK_ID:
462 for (idx = 0; idx < ie_len && idx < MFR_ID_STRING_MAXLEN; idx++) {
463 if (*(tptr+idx) != 0) /* don't print null termination */
464 safeputchar(*(tptr+idx));
470 case MFR_CTRL_IE_TIMESTAMP:
471 if (ie_len == sizeof(struct timeval)) {
472 ts_print((const struct timeval *)tptr);
475 /* fall through and hexdump if no unix timestamp */
478 * FIXME those are the defined IEs that lack a decoder
479 * you are welcome to contribute code ;-)
482 case MFR_CTRL_IE_VENDOR_EXT:
483 case MFR_CTRL_IE_CAUSE:
487 print_unknown_data(tptr,"\n\t ",ie_len);
491 /* do we want to see a hexdump of the IE ? */
493 print_unknown_data(tptr,"\n\t ",ie_len);
501 * FRF.16 Fragmentation Frame
504 * +----+----+----+----+----+----+----+----+
505 * | B | E | C=0|seq. (high 4 bits) | EA |
506 * +----+----+----+----+----+----+----+----+
507 * | sequence (low 8 bits) |
508 * +----+----+----+----+----+----+----+----+
509 * | DLCI (6 bits) | CR | EA |
510 * +----+----+----+----+----+----+----+----+
511 * | DLCI (4 bits) |FECN|BECN| DE | EA |
512 * +----+----+----+----+----+----+----+----+
515 sequence_num = (p[0]&0x1e)<<7 | p[1];
516 /* whole packet or first fragment ? */
517 if ((p[0] & MFR_BEC_MASK) == MFR_FRAG_FRAME ||
518 (p[0] & MFR_BEC_MASK) == MFR_B_BIT) {
519 printf("FRF.16 Frag, seq %u, Flags [%s], ",
521 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
523 fr_print(p+hdr_len,length-hdr_len);
527 /* must be a middle or the last fragment */
528 printf("FRF.16 Frag, seq %u, Flags [%s]",
530 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
531 print_unknown_data(p,"\n\t",length);
540 /* an NLPID of 0xb1 indicates a 2-byte
544 * +----+----+----+----+----+----+----+----+
546 * +----+----+----+----+----+----+----+----+
547 * | NLPID (8 bits) | NLPID=0xb1
548 * +----+----+----+----+----+----+----+----+
549 * | B | E | C |seq. (high 4 bits) | R |
550 * +----+----+----+----+----+----+----+----+
551 * | sequence (low 8 bits) |
552 * +----+----+----+----+----+----+----+----+
555 #define FR_FRF15_FRAGTYPE 0x01
558 frf15_print (const u_char *p, u_int length) {
560 u_int16_t sequence_num, flags;
562 flags = p[0]&MFR_BEC_MASK;
563 sequence_num = (p[0]&0x1e)<<7 | p[1];
565 printf("FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u",
567 bittok2str(frf_flag_values,"none",flags),
568 p[0]&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End",
572 * depending on all permutations of the B, E and C bit
573 * dig as deep as we can - e.g. on the first (B) fragment
574 * there is enough payload to print the IP header
575 * on non (B) fragments it depends if the fragmentation
576 * model is end-to-end or interface based wether we want to print
577 * another Q.922 header
583 * Q.933 decoding portion for framerelay specific.
586 /* Q.933 packet format
587 Format of Other Protocols
589 +-------------------------------+
591 +---------------+---------------+
592 |Control 0x03 | NLPID 0x08 |
593 +---------------+---------------+
595 | octet 1 | octet 2 |
596 +-------------------------------+
598 | octet 2 | octet 2 |
599 +-------------------------------+
601 +-------------------------------+
603 +-------------------------------+
606 /* L2 (Octet 1)- Call Reference Usually is 0x0 */
609 * L2 (Octet 2)- Message Types definition 1 byte long.
612 #define MSG_TYPE_ESC_TO_NATIONAL 0x00
613 #define MSG_TYPE_ALERT 0x01
614 #define MSG_TYPE_CALL_PROCEEDING 0x02
615 #define MSG_TYPE_CONNECT 0x07
616 #define MSG_TYPE_CONNECT_ACK 0x0F
617 #define MSG_TYPE_PROGRESS 0x03
618 #define MSG_TYPE_SETUP 0x05
620 #define MSG_TYPE_DISCONNECT 0x45
621 #define MSG_TYPE_RELEASE 0x4D
622 #define MSG_TYPE_RELEASE_COMPLETE 0x5A
623 #define MSG_TYPE_RESTART 0x46
624 #define MSG_TYPE_RESTART_ACK 0x4E
626 #define MSG_TYPE_STATUS 0x7D
627 #define MSG_TYPE_STATUS_ENQ 0x75
629 struct tok fr_q933_msg_values[] = {
630 { MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" },
631 { MSG_TYPE_ALERT, "Alert" },
632 { MSG_TYPE_CALL_PROCEEDING, "Call proceeding" },
633 { MSG_TYPE_CONNECT, "Connect" },
634 { MSG_TYPE_CONNECT_ACK, "Connect ACK" },
635 { MSG_TYPE_PROGRESS, "Progress" },
636 { MSG_TYPE_SETUP, "Setup" },
637 { MSG_TYPE_DISCONNECT, "Disconnect" },
638 { MSG_TYPE_RELEASE, "Release" },
639 { MSG_TYPE_RELEASE_COMPLETE, "Release Complete" },
640 { MSG_TYPE_RESTART, "Restart" },
641 { MSG_TYPE_RESTART_ACK, "Restart ACK" },
642 { MSG_TYPE_STATUS, "Status Reply" },
643 { MSG_TYPE_STATUS_ENQ, "Status Enquiry" },
647 #define MSG_ANSI_LOCKING_SHIFT 0x95
649 #define FR_LMI_ANSI_REPORT_TYPE_IE 0x01
650 #define FR_LMI_ANSI_LINK_VERIFY_IE_91 0x19 /* details? */
651 #define FR_LMI_ANSI_LINK_VERIFY_IE 0x03
652 #define FR_LMI_ANSI_PVC_STATUS_IE 0x07
654 #define FR_LMI_CCITT_REPORT_TYPE_IE 0x51
655 #define FR_LMI_CCITT_LINK_VERIFY_IE 0x53
656 #define FR_LMI_CCITT_PVC_STATUS_IE 0x57
658 struct tok fr_q933_ie_values_codeset5[] = {
659 { FR_LMI_ANSI_REPORT_TYPE_IE, "ANSI Report Type" },
660 { FR_LMI_ANSI_LINK_VERIFY_IE_91, "ANSI Link Verify" },
661 { FR_LMI_ANSI_LINK_VERIFY_IE, "ANSI Link Verify" },
662 { FR_LMI_ANSI_PVC_STATUS_IE, "ANSI PVC Status" },
663 { FR_LMI_CCITT_REPORT_TYPE_IE, "CCITT Report Type" },
664 { FR_LMI_CCITT_LINK_VERIFY_IE, "CCITT Link Verify" },
665 { FR_LMI_CCITT_PVC_STATUS_IE, "CCITT PVC Status" },
669 #define FR_LMI_REPORT_TYPE_IE_FULL_STATUS 0
670 #define FR_LMI_REPORT_TYPE_IE_LINK_VERIFY 1
671 #define FR_LMI_REPORT_TYPE_IE_ASYNC_PVC 2
673 struct tok fr_lmi_report_type_ie_values[] = {
674 { FR_LMI_REPORT_TYPE_IE_FULL_STATUS, "Full Status" },
675 { FR_LMI_REPORT_TYPE_IE_LINK_VERIFY, "Link verify" },
676 { FR_LMI_REPORT_TYPE_IE_ASYNC_PVC, "Async PVC Status" },
680 /* array of 16 codepages - currently we only support codepage 1,5 */
681 static struct tok *fr_q933_ie_codesets[] = {
683 fr_q933_ie_values_codeset5,
687 fr_q933_ie_values_codeset5,
700 static int fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p,
703 typedef int (*codeset_pr_func_t)(const struct ie_tlv_header_t *ie_p,
706 /* array of 16 codepages - currently we only support codepage 1,5 */
707 static codeset_pr_func_t fr_q933_print_ie_codeset[] = {
709 fr_q933_print_ie_codeset5,
713 fr_q933_print_ie_codeset5,
727 q933_print(const u_char *p, u_int length)
729 const u_char *ptemp = p;
730 struct ie_tlv_header_t *ie_p;
734 u_int ie_is_known = 0;
736 if (length < 9) { /* shortest: Q.933a LINK VERIFY */
741 codeset = p[2]&0x0f; /* extract the codeset */
743 if (p[2] == MSG_ANSI_LOCKING_SHIFT) {
747 printf("%s", eflag ? "" : "Q.933, ");
749 /* printing out header part */
750 printf("%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset);
753 printf(", Call Ref: 0x%02x", p[0]);
756 printf(", %s (0x%02x), length %u",
757 tok2str(fr_q933_msg_values,
758 "unknown message", p[1]),
763 tok2str(fr_q933_msg_values,
764 "unknown message 0x%02x", p[1]));
767 olen = length; /* preserve the original length for non verbose mode */
769 if (length < (u_int)(2 - is_ansi)) {
773 length -= 2 + is_ansi;
774 ptemp += 2 + is_ansi;
776 /* Loop through the rest of IE */
777 while (length > sizeof(struct ie_tlv_header_t)) {
778 ie_p = (struct ie_tlv_header_t *)ptemp;
779 if (length < sizeof(struct ie_tlv_header_t) ||
780 length < sizeof(struct ie_tlv_header_t) + ie_p->ie_len) {
781 if (vflag) { /* not bark if there is just a trailer */
782 printf("\n[|q.933]");
784 printf(", length %u",olen);
789 /* lets do the full IE parsing only in verbose mode
790 * however some IEs (DLCI Status, Link Verify)
791 * are also interestting in non-verbose mode */
793 printf("\n\t%s IE (0x%02x), length %u: ",
794 tok2str(fr_q933_ie_codesets[codeset],
795 "unknown", ie_p->ie_type),
801 if (ie_p->ie_type == 0 || ie_p->ie_len == 0) {
805 if (fr_q933_print_ie_codeset[codeset] != NULL) {
806 ie_is_known = fr_q933_print_ie_codeset[codeset](ie_p, ptemp);
809 if (vflag >= 1 && !ie_is_known) {
810 print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len);
813 /* do we want to see a hexdump of the IE ? */
814 if (vflag> 1 && ie_is_known) {
815 print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len);
818 length = length - ie_p->ie_len - 2;
819 ptemp = ptemp + ie_p->ie_len + 2;
822 printf(", length %u",olen);
827 fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p)
831 switch (ie_p->ie_type) {
833 case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */
834 case FR_LMI_CCITT_REPORT_TYPE_IE:
837 tok2str(fr_lmi_report_type_ie_values,"unknown",p[2]),
842 case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */
843 case FR_LMI_CCITT_LINK_VERIFY_IE:
844 case FR_LMI_ANSI_LINK_VERIFY_IE_91:
848 printf("TX Seq: %3d, RX Seq: %3d", p[2], p[3]);
851 case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */
852 case FR_LMI_CCITT_PVC_STATUS_IE:
856 /* now parse the DLCI information element. */
857 if ((ie_p->ie_len < 3) ||
859 ((ie_p->ie_len == 3) && !(p[3] & 0x80)) ||
860 ((ie_p->ie_len == 4) && ((p[3] & 0x80) || !(p[4] & 0x80))) ||
861 ((ie_p->ie_len == 5) && ((p[3] & 0x80) || (p[4] & 0x80) ||
863 (ie_p->ie_len > 5) ||
864 !(p[ie_p->ie_len + 1] & 0x80)) {
865 printf("Invalid DLCI IE");
868 dlci = ((p[2] & 0x3F) << 4) | ((p[3] & 0x78) >> 3);
869 if (ie_p->ie_len == 4) {
870 dlci = (dlci << 6) | ((p[4] & 0x7E) >> 1);
872 else if (ie_p->ie_len == 5) {
873 dlci = (dlci << 13) | (p[4] & 0x7F) | ((p[5] & 0x7E) >> 1);
876 printf("DLCI %u: status %s%s", dlci,
877 p[ie_p->ie_len + 1] & 0x8 ? "New, " : "",
878 p[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive");