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.
25 static const char rcsid[] _U_ =
26 "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.51 2006-06-23 22:20:32 hannes Exp $ (LBL)";
33 #include <tcpdump-stdinc.h>
39 #include "addrtoname.h"
40 #include "interface.h"
41 #include "ethertype.h"
46 static void frf15_print(const u_char *, u_int);
49 * the frame relay header has a variable length
51 * the EA bit determines if there is another byte
54 * minimum header length is 2 bytes
55 * maximum header length is 4 bytes
58 * +----+----+----+----+----+----+----+----+
59 * | DLCI (6 bits) | CR | EA |
60 * +----+----+----+----+----+----+----+----+
61 * | DLCI (4 bits) |FECN|BECN| DE | EA |
62 * +----+----+----+----+----+----+----+----+
63 * | DLCI (7 bits) | EA |
64 * +----+----+----+----+----+----+----+----+
65 * | DLCI (6 bits) |SDLC| EA |
66 * +----+----+----+----+----+----+----+----+
69 #define FR_EA_BIT 0x01
71 #define FR_CR_BIT 0x02000000
72 #define FR_DE_BIT 0x00020000
73 #define FR_BECN_BIT 0x00040000
74 #define FR_FECN_BIT 0x00080000
75 #define FR_SDLC_BIT 0x00000002
78 struct tok fr_header_flag_values[] = {
81 { FR_BECN_BIT, "BECN" },
82 { FR_FECN_BIT, "FECN" },
83 { FR_SDLC_BIT, "sdlcore" },
88 #define MFR_B_BIT 0x80
89 #define MFR_E_BIT 0x40
90 #define MFR_C_BIT 0x20
91 #define MFR_BEC_MASK (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT)
92 #define MFR_CTRL_FRAME (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT)
93 #define MFR_FRAG_FRAME (MFR_B_BIT | MFR_E_BIT )
95 struct tok frf_flag_values[] = {
96 { MFR_B_BIT, "Begin" },
98 { MFR_C_BIT, "Control" },
102 /* Finds out Q.922 address length, DLCI and flags. Returns 0 on success
103 * save the flags dep. on address length
105 static int parse_q922_addr(const u_char *p, u_int *dlci,
106 u_int *addr_len, u_int8_t *flags)
108 if ((p[0] & FR_EA_BIT))
112 *dlci = ((p[0] & 0xFC) << 2) | ((p[1] & 0xF0) >> 4);
114 flags[0] = p[0] & 0x02; /* populate the first flag fields */
115 flags[1] = p[1] & 0x0c;
116 flags[2] = 0; /* clear the rest of the flags */
119 if (p[1] & FR_EA_BIT)
120 return 0; /* 2-byte Q.922 address */
123 (*addr_len)++; /* 3- or 4-byte Q.922 address */
124 if ((p[0] & FR_EA_BIT) == 0) {
125 *dlci = (*dlci << 7) | (p[0] >> 1);
126 (*addr_len)++; /* 4-byte Q.922 address */
130 if ((p[0] & FR_EA_BIT) == 0)
131 return -1; /* more than 4 bytes of Q.922 address? */
133 flags[3] = p[0] & 0x02;
135 *dlci = (*dlci << 6) | (p[0] >> 2);
140 char *q922_string(const u_char *p) {
142 static u_int dlci, addr_len;
143 static u_int8_t flags[4];
144 static char buffer[sizeof("DLCI xxxxxxxxxx")];
145 memset(buffer, 0, sizeof(buffer));
147 if (parse_q922_addr(p, &dlci, &addr_len, flags) == 0){
148 snprintf(buffer, sizeof(buffer), "DLCI %u", dlci);
155 /* Frame Relay packet structure, with flags and CRC removed
157 +---------------------------+
161 +---------------------------+
162 | Control (UI = 0x03) |
163 +---------------------------+
164 | Optional Pad (0x00) |
165 +---------------------------+
167 +---------------------------+
174 +---------------------------+
176 * Q.922 addresses, as presently defined, are two octets and
177 contain a 10-bit DLCI. In some networks Q.922 addresses
178 may optionally be increased to three or four octets.
182 fr_hdrlen(const u_char *p, u_int addr_len)
184 if (!p[addr_len + 1] /* pad exist */)
185 return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */;
187 return addr_len + 1 /* UI */ + 1 /* NLPID */;
191 fr_hdr_print(int length, u_int addr_len, u_int dlci, u_int8_t *flags, u_int16_t nlpid)
194 (void)printf("Q.922, DLCI %u, length %u: ",
198 if (nlpid <= 0xff) /* if its smaller than 256 then its a NLPID */
199 (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], NLPID %s (0x%02x), length %u: ",
202 bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
203 tok2str(nlpid_values,"unknown", nlpid),
206 else /* must be an ethertype */
207 (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ",
210 bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
211 tok2str(ethertype_values, "unknown", nlpid),
218 fr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
220 register u_int length = h->len;
221 register u_int caplen = h->caplen;
223 TCHECK2(*p, 4); /* minimum frame header length */
225 if ((length = fr_print(p, length)) == 0)
235 fr_print(register const u_char *p, u_int length)
237 u_int16_t extracted_ethertype;
244 if (parse_q922_addr(p, &dlci, &addr_len, flags)) {
245 printf("Q.922, invalid address");
249 TCHECK2(*p,addr_len+1+1);
250 hdr_len = fr_hdrlen(p, addr_len);
253 if (p[addr_len] != 0x03 && dlci != 0) {
255 /* lets figure out if we have cisco style encapsulation: */
256 extracted_ethertype = EXTRACT_16BITS(p+addr_len);
259 fr_hdr_print(length, addr_len, dlci, flags, extracted_ethertype);
261 if (ethertype_print(gndo, extracted_ethertype,
262 p+addr_len+ETHERTYPE_LEN,
263 length-addr_len-ETHERTYPE_LEN,
264 length-addr_len-ETHERTYPE_LEN) == 0)
265 /* ether_type not known, probably it wasn't one */
266 printf("UI %02x! ", p[addr_len]);
271 if (!p[addr_len + 1]) { /* pad byte should be used with 3-byte Q.922 */
274 } else if (addr_len == 3)
277 nlpid = p[hdr_len - 1];
280 fr_hdr_print(length, addr_len, dlci, flags, nlpid);
286 ip_print(gndo, p, length);
291 ip6_print(gndo, p, length);
297 isoclns_print(p-1, length+1, length+1); /* OSI printers need the NLPID field */
301 if (snap_print(p, length, length, 0) == 0) {
302 /* ether_type not known, print raw packet */
304 fr_hdr_print(length + hdr_len, hdr_len,
306 if (!suppress_default_print)
307 default_print(p - hdr_len, length + hdr_len);
312 q933_print(p, length);
316 frf15_print(p, length);
320 ppp_print(p, length);
325 fr_hdr_print(length + hdr_len, addr_len,
328 default_print(p, length);
340 mfr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
342 register u_int length = h->len;
343 register u_int caplen = h->caplen;
345 TCHECK2(*p, 2); /* minimum frame header length */
347 if ((length = mfr_print(p, length)) == 0)
357 #define MFR_CTRL_MSG_ADD_LINK 1
358 #define MFR_CTRL_MSG_ADD_LINK_ACK 2
359 #define MFR_CTRL_MSG_ADD_LINK_REJ 3
360 #define MFR_CTRL_MSG_HELLO 4
361 #define MFR_CTRL_MSG_HELLO_ACK 5
362 #define MFR_CTRL_MSG_REMOVE_LINK 6
363 #define MFR_CTRL_MSG_REMOVE_LINK_ACK 7
365 struct tok mfr_ctrl_msg_values[] = {
366 { MFR_CTRL_MSG_ADD_LINK, "Add Link" },
367 { MFR_CTRL_MSG_ADD_LINK_ACK, "Add Link ACK" },
368 { MFR_CTRL_MSG_ADD_LINK_REJ, "Add Link Reject" },
369 { MFR_CTRL_MSG_HELLO, "Hello" },
370 { MFR_CTRL_MSG_HELLO_ACK, "Hello ACK" },
371 { MFR_CTRL_MSG_REMOVE_LINK, "Remove Link" },
372 { MFR_CTRL_MSG_REMOVE_LINK_ACK, "Remove Link ACK" },
376 #define MFR_CTRL_IE_BUNDLE_ID 1
377 #define MFR_CTRL_IE_LINK_ID 2
378 #define MFR_CTRL_IE_MAGIC_NUM 3
379 #define MFR_CTRL_IE_TIMESTAMP 5
380 #define MFR_CTRL_IE_VENDOR_EXT 6
381 #define MFR_CTRL_IE_CAUSE 7
383 struct tok mfr_ctrl_ie_values[] = {
384 { MFR_CTRL_IE_BUNDLE_ID, "Bundle ID"},
385 { MFR_CTRL_IE_LINK_ID, "Link ID"},
386 { MFR_CTRL_IE_MAGIC_NUM, "Magic Number"},
387 { MFR_CTRL_IE_TIMESTAMP, "Timestamp"},
388 { MFR_CTRL_IE_VENDOR_EXT, "Vendor Extension"},
389 { MFR_CTRL_IE_CAUSE, "Cause"},
393 #define MFR_ID_STRING_MAXLEN 50
395 struct ie_tlv_header_t {
401 mfr_print(register const u_char *p, u_int length)
403 u_int tlen,idx,hdr_len = 0;
404 u_int16_t sequence_num;
405 u_int8_t ie_type,ie_len;
406 const u_int8_t *tptr;
410 * FRF.16 Link Integrity Control Frame
413 * +----+----+----+----+----+----+----+----+
414 * | B | E | C=1| 0 0 0 0 | EA |
415 * +----+----+----+----+----+----+----+----+
416 * | 0 0 0 0 0 0 0 0 |
417 * +----+----+----+----+----+----+----+----+
419 * +----+----+----+----+----+----+----+----+
422 TCHECK2(*p, 4); /* minimum frame header length */
424 if ((p[0] & MFR_BEC_MASK) == MFR_CTRL_FRAME && p[1] == 0) {
425 printf("FRF.16 Control, Flags [%s], %s, length %u",
426 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)),
427 tok2str(mfr_ctrl_msg_values,"Unknown Message (0x%02x)",p[2]),
436 while (tlen>sizeof(struct ie_tlv_header_t)) {
437 TCHECK2(*tptr, sizeof(struct ie_tlv_header_t));
441 printf("\n\tIE %s (%u), length %u: ",
442 tok2str(mfr_ctrl_ie_values,"Unknown",ie_type),
446 /* infinite loop check */
447 if (ie_type == 0 || ie_len <= sizeof(struct ie_tlv_header_t))
450 TCHECK2(*tptr,ie_len);
451 tptr+=sizeof(struct ie_tlv_header_t);
452 /* tlv len includes header */
453 ie_len-=sizeof(struct ie_tlv_header_t);
454 tlen-=sizeof(struct ie_tlv_header_t);
458 case MFR_CTRL_IE_MAGIC_NUM:
459 printf("0x%08x",EXTRACT_32BITS(tptr));
462 case MFR_CTRL_IE_BUNDLE_ID: /* same message format */
463 case MFR_CTRL_IE_LINK_ID:
464 for (idx = 0; idx < ie_len && idx < MFR_ID_STRING_MAXLEN; idx++) {
465 if (*(tptr+idx) != 0) /* don't print null termination */
466 safeputchar(*(tptr+idx));
472 case MFR_CTRL_IE_TIMESTAMP:
473 if (ie_len == sizeof(struct timeval)) {
474 ts_print((const struct timeval *)tptr);
477 /* fall through and hexdump if no unix timestamp */
480 * FIXME those are the defined IEs that lack a decoder
481 * you are welcome to contribute code ;-)
484 case MFR_CTRL_IE_VENDOR_EXT:
485 case MFR_CTRL_IE_CAUSE:
489 print_unknown_data(tptr,"\n\t ",ie_len);
493 /* do we want to see a hexdump of the IE ? */
495 print_unknown_data(tptr,"\n\t ",ie_len);
503 * FRF.16 Fragmentation Frame
506 * +----+----+----+----+----+----+----+----+
507 * | B | E | C=0|seq. (high 4 bits) | EA |
508 * +----+----+----+----+----+----+----+----+
509 * | sequence (low 8 bits) |
510 * +----+----+----+----+----+----+----+----+
511 * | DLCI (6 bits) | CR | EA |
512 * +----+----+----+----+----+----+----+----+
513 * | DLCI (4 bits) |FECN|BECN| DE | EA |
514 * +----+----+----+----+----+----+----+----+
517 sequence_num = (p[0]&0x1e)<<7 | p[1];
518 /* whole packet or first fragment ? */
519 if ((p[0] & MFR_BEC_MASK) == MFR_FRAG_FRAME ||
520 (p[0] & MFR_BEC_MASK) == MFR_B_BIT) {
521 printf("FRF.16 Frag, seq %u, Flags [%s], ",
523 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
525 fr_print(p+hdr_len,length-hdr_len);
529 /* must be a middle or the last fragment */
530 printf("FRF.16 Frag, seq %u, Flags [%s]",
532 bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
533 print_unknown_data(p,"\n\t",length);
542 /* an NLPID of 0xb1 indicates a 2-byte
546 * +----+----+----+----+----+----+----+----+
548 * +----+----+----+----+----+----+----+----+
549 * | NLPID (8 bits) | NLPID=0xb1
550 * +----+----+----+----+----+----+----+----+
551 * | B | E | C |seq. (high 4 bits) | R |
552 * +----+----+----+----+----+----+----+----+
553 * | sequence (low 8 bits) |
554 * +----+----+----+----+----+----+----+----+
557 #define FR_FRF15_FRAGTYPE 0x01
560 frf15_print (const u_char *p, u_int length) {
562 u_int16_t sequence_num, flags;
564 flags = p[0]&MFR_BEC_MASK;
565 sequence_num = (p[0]&0x1e)<<7 | p[1];
567 printf("FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u",
569 bittok2str(frf_flag_values,"none",flags),
570 p[0]&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End",
574 * depending on all permutations of the B, E and C bit
575 * dig as deep as we can - e.g. on the first (B) fragment
576 * there is enough payload to print the IP header
577 * on non (B) fragments it depends if the fragmentation
578 * model is end-to-end or interface based wether we want to print
579 * another Q.922 header
585 * Q.933 decoding portion for framerelay specific.
588 /* Q.933 packet format
589 Format of Other Protocols
591 +-------------------------------+
593 +---------------+---------------+
594 |Control 0x03 | NLPID 0x08 |
595 +---------------+---------------+
597 | octet 1 | octet 2 |
598 +-------------------------------+
600 | octet 2 | octet 2 |
601 +-------------------------------+
603 +-------------------------------+
605 +-------------------------------+
608 /* L2 (Octet 1)- Call Reference Usually is 0x0 */
611 * L2 (Octet 2)- Message Types definition 1 byte long.
614 #define MSG_TYPE_ESC_TO_NATIONAL 0x00
615 #define MSG_TYPE_ALERT 0x01
616 #define MSG_TYPE_CALL_PROCEEDING 0x02
617 #define MSG_TYPE_CONNECT 0x07
618 #define MSG_TYPE_CONNECT_ACK 0x0F
619 #define MSG_TYPE_PROGRESS 0x03
620 #define MSG_TYPE_SETUP 0x05
622 #define MSG_TYPE_DISCONNECT 0x45
623 #define MSG_TYPE_RELEASE 0x4D
624 #define MSG_TYPE_RELEASE_COMPLETE 0x5A
625 #define MSG_TYPE_RESTART 0x46
626 #define MSG_TYPE_RESTART_ACK 0x4E
628 #define MSG_TYPE_STATUS 0x7D
629 #define MSG_TYPE_STATUS_ENQ 0x75
631 struct tok fr_q933_msg_values[] = {
632 { MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" },
633 { MSG_TYPE_ALERT, "Alert" },
634 { MSG_TYPE_CALL_PROCEEDING, "Call proceeding" },
635 { MSG_TYPE_CONNECT, "Connect" },
636 { MSG_TYPE_CONNECT_ACK, "Connect ACK" },
637 { MSG_TYPE_PROGRESS, "Progress" },
638 { MSG_TYPE_SETUP, "Setup" },
639 { MSG_TYPE_DISCONNECT, "Disconnect" },
640 { MSG_TYPE_RELEASE, "Release" },
641 { MSG_TYPE_RELEASE_COMPLETE, "Release Complete" },
642 { MSG_TYPE_RESTART, "Restart" },
643 { MSG_TYPE_RESTART_ACK, "Restart ACK" },
644 { MSG_TYPE_STATUS, "Status Reply" },
645 { MSG_TYPE_STATUS_ENQ, "Status Enquiry" },
649 #define MSG_ANSI_LOCKING_SHIFT 0x95
651 #define FR_LMI_ANSI_REPORT_TYPE_IE 0x01
652 #define FR_LMI_ANSI_LINK_VERIFY_IE_91 0x19 /* details? */
653 #define FR_LMI_ANSI_LINK_VERIFY_IE 0x03
654 #define FR_LMI_ANSI_PVC_STATUS_IE 0x07
656 #define FR_LMI_CCITT_REPORT_TYPE_IE 0x51
657 #define FR_LMI_CCITT_LINK_VERIFY_IE 0x53
658 #define FR_LMI_CCITT_PVC_STATUS_IE 0x57
660 struct tok fr_q933_ie_values_codeset5[] = {
661 { FR_LMI_ANSI_REPORT_TYPE_IE, "ANSI Report Type" },
662 { FR_LMI_ANSI_LINK_VERIFY_IE_91, "ANSI Link Verify" },
663 { FR_LMI_ANSI_LINK_VERIFY_IE, "ANSI Link Verify" },
664 { FR_LMI_ANSI_PVC_STATUS_IE, "ANSI PVC Status" },
665 { FR_LMI_CCITT_REPORT_TYPE_IE, "CCITT Report Type" },
666 { FR_LMI_CCITT_LINK_VERIFY_IE, "CCITT Link Verify" },
667 { FR_LMI_CCITT_PVC_STATUS_IE, "CCITT PVC Status" },
671 #define FR_LMI_REPORT_TYPE_IE_FULL_STATUS 0
672 #define FR_LMI_REPORT_TYPE_IE_LINK_VERIFY 1
673 #define FR_LMI_REPORT_TYPE_IE_ASYNC_PVC 2
675 struct tok fr_lmi_report_type_ie_values[] = {
676 { FR_LMI_REPORT_TYPE_IE_FULL_STATUS, "Full Status" },
677 { FR_LMI_REPORT_TYPE_IE_LINK_VERIFY, "Link verify" },
678 { FR_LMI_REPORT_TYPE_IE_ASYNC_PVC, "Async PVC Status" },
682 /* array of 16 codepages - currently we only support codepage 1,5 */
683 static struct tok *fr_q933_ie_codesets[] = {
685 fr_q933_ie_values_codeset5,
689 fr_q933_ie_values_codeset5,
702 static int fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p,
705 typedef int (*codeset_pr_func_t)(const struct ie_tlv_header_t *ie_p,
708 /* array of 16 codepages - currently we only support codepage 1,5 */
709 static codeset_pr_func_t fr_q933_print_ie_codeset[] = {
711 fr_q933_print_ie_codeset5,
715 fr_q933_print_ie_codeset5,
729 q933_print(const u_char *p, u_int length)
731 const u_char *ptemp = p;
732 struct ie_tlv_header_t *ie_p;
736 u_int ie_is_known = 0;
738 if (length < 9) { /* shortest: Q.933a LINK VERIFY */
743 codeset = p[2]&0x0f; /* extract the codeset */
745 if (p[2] == MSG_ANSI_LOCKING_SHIFT) {
749 printf("%s", eflag ? "" : "Q.933, ");
751 /* printing out header part */
752 printf("%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset);
755 printf(", Call Ref: 0x%02x", p[0]);
758 printf(", %s (0x%02x), length %u",
759 tok2str(fr_q933_msg_values,
760 "unknown message", p[1]),
765 tok2str(fr_q933_msg_values,
766 "unknown message 0x%02x", p[1]));
769 olen = length; /* preserve the original length for non verbose mode */
771 if (length < (u_int)(2 - is_ansi)) {
775 length -= 2 + is_ansi;
776 ptemp += 2 + is_ansi;
778 /* Loop through the rest of IE */
779 while (length > sizeof(struct ie_tlv_header_t)) {
780 ie_p = (struct ie_tlv_header_t *)ptemp;
781 if (length < sizeof(struct ie_tlv_header_t) ||
782 length < sizeof(struct ie_tlv_header_t) + ie_p->ie_len) {
783 if (vflag) { /* not bark if there is just a trailer */
784 printf("\n[|q.933]");
786 printf(", length %u",olen);
791 /* lets do the full IE parsing only in verbose mode
792 * however some IEs (DLCI Status, Link Verify)
793 * are also interestting in non-verbose mode */
795 printf("\n\t%s IE (0x%02x), length %u: ",
796 tok2str(fr_q933_ie_codesets[codeset],
797 "unknown", ie_p->ie_type),
803 if (ie_p->ie_type == 0 || ie_p->ie_len == 0) {
807 if (fr_q933_print_ie_codeset[codeset] != NULL) {
808 ie_is_known = fr_q933_print_ie_codeset[codeset](ie_p, ptemp);
811 if (vflag >= 1 && !ie_is_known) {
812 print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len);
815 /* do we want to see a hexdump of the IE ? */
816 if (vflag> 1 && ie_is_known) {
817 print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len);
820 length = length - ie_p->ie_len - 2;
821 ptemp = ptemp + ie_p->ie_len + 2;
824 printf(", length %u",olen);
829 fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p)
833 switch (ie_p->ie_type) {
835 case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */
836 case FR_LMI_CCITT_REPORT_TYPE_IE:
839 tok2str(fr_lmi_report_type_ie_values,"unknown",p[2]),
844 case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */
845 case FR_LMI_CCITT_LINK_VERIFY_IE:
846 case FR_LMI_ANSI_LINK_VERIFY_IE_91:
850 printf("TX Seq: %3d, RX Seq: %3d", p[2], p[3]);
853 case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */
854 case FR_LMI_CCITT_PVC_STATUS_IE:
858 /* now parse the DLCI information element. */
859 if ((ie_p->ie_len < 3) ||
861 ((ie_p->ie_len == 3) && !(p[3] & 0x80)) ||
862 ((ie_p->ie_len == 4) && ((p[3] & 0x80) || !(p[4] & 0x80))) ||
863 ((ie_p->ie_len == 5) && ((p[3] & 0x80) || (p[4] & 0x80) ||
865 (ie_p->ie_len > 5) ||
866 !(p[ie_p->ie_len + 1] & 0x80)) {
867 printf("Invalid DLCI IE");
870 dlci = ((p[2] & 0x3F) << 4) | ((p[3] & 0x78) >> 3);
871 if (ie_p->ie_len == 4) {
872 dlci = (dlci << 6) | ((p[4] & 0x7E) >> 1);
874 else if (ie_p->ie_len == 5) {
875 dlci = (dlci << 13) | (p[4] & 0x7F) | ((p[5] & 0x7E) >> 1);
878 printf("DLCI %u: status %s%s", dlci,
879 p[ie_p->ie_len + 1] & 0x8 ? "New, " : "",
880 p[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive");