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-rw-r--r--freebsd/contrib/tcpdump/print-fr.c887
1 files changed, 887 insertions, 0 deletions
diff --git a/freebsd/contrib/tcpdump/print-fr.c b/freebsd/contrib/tcpdump/print-fr.c
new file mode 100644
index 00000000..73e056d4
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-fr.c
@@ -0,0 +1,887 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.51 2006-06-23 22:20:32 hannes Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <pcap.h>
+
+#include "addrtoname.h"
+#include "interface.h"
+#include "ethertype.h"
+#include "nlpid.h"
+#include "extract.h"
+#include "oui.h"
+
+static void frf15_print(const u_char *, u_int);
+
+/*
+ * the frame relay header has a variable length
+ *
+ * the EA bit determines if there is another byte
+ * in the header
+ *
+ * minimum header length is 2 bytes
+ * maximum header length is 4 bytes
+ *
+ * 7 6 5 4 3 2 1 0
+ * +----+----+----+----+----+----+----+----+
+ * | DLCI (6 bits) | CR | EA |
+ * +----+----+----+----+----+----+----+----+
+ * | DLCI (4 bits) |FECN|BECN| DE | EA |
+ * +----+----+----+----+----+----+----+----+
+ * | DLCI (7 bits) | EA |
+ * +----+----+----+----+----+----+----+----+
+ * | DLCI (6 bits) |SDLC| EA |
+ * +----+----+----+----+----+----+----+----+
+ */
+
+#define FR_EA_BIT 0x01
+
+#define FR_CR_BIT 0x02000000
+#define FR_DE_BIT 0x00020000
+#define FR_BECN_BIT 0x00040000
+#define FR_FECN_BIT 0x00080000
+#define FR_SDLC_BIT 0x00000002
+
+
+struct tok fr_header_flag_values[] = {
+ { FR_CR_BIT, "C!" },
+ { FR_DE_BIT, "DE" },
+ { FR_BECN_BIT, "BECN" },
+ { FR_FECN_BIT, "FECN" },
+ { FR_SDLC_BIT, "sdlcore" },
+ { 0, NULL }
+};
+
+/* FRF.15 / FRF.16 */
+#define MFR_B_BIT 0x80
+#define MFR_E_BIT 0x40
+#define MFR_C_BIT 0x20
+#define MFR_BEC_MASK (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT)
+#define MFR_CTRL_FRAME (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT)
+#define MFR_FRAG_FRAME (MFR_B_BIT | MFR_E_BIT )
+
+struct tok frf_flag_values[] = {
+ { MFR_B_BIT, "Begin" },
+ { MFR_E_BIT, "End" },
+ { MFR_C_BIT, "Control" },
+ { 0, NULL }
+};
+
+/* Finds out Q.922 address length, DLCI and flags. Returns 0 on success
+ * save the flags dep. on address length
+ */
+static int parse_q922_addr(const u_char *p, u_int *dlci,
+ u_int *addr_len, u_int8_t *flags)
+{
+ if ((p[0] & FR_EA_BIT))
+ return -1;
+
+ *addr_len = 2;
+ *dlci = ((p[0] & 0xFC) << 2) | ((p[1] & 0xF0) >> 4);
+
+ flags[0] = p[0] & 0x02; /* populate the first flag fields */
+ flags[1] = p[1] & 0x0c;
+ flags[2] = 0; /* clear the rest of the flags */
+ flags[3] = 0;
+
+ if (p[1] & FR_EA_BIT)
+ return 0; /* 2-byte Q.922 address */
+
+ p += 2;
+ (*addr_len)++; /* 3- or 4-byte Q.922 address */
+ if ((p[0] & FR_EA_BIT) == 0) {
+ *dlci = (*dlci << 7) | (p[0] >> 1);
+ (*addr_len)++; /* 4-byte Q.922 address */
+ p++;
+ }
+
+ if ((p[0] & FR_EA_BIT) == 0)
+ return -1; /* more than 4 bytes of Q.922 address? */
+
+ flags[3] = p[0] & 0x02;
+
+ *dlci = (*dlci << 6) | (p[0] >> 2);
+
+ return 0;
+}
+
+char *q922_string(const u_char *p) {
+
+ static u_int dlci, addr_len;
+ static u_int8_t flags[4];
+ static char buffer[sizeof("DLCI xxxxxxxxxx")];
+ memset(buffer, 0, sizeof(buffer));
+
+ if (parse_q922_addr(p, &dlci, &addr_len, flags) == 0){
+ snprintf(buffer, sizeof(buffer), "DLCI %u", dlci);
+ }
+
+ return buffer;
+}
+
+
+/* Frame Relay packet structure, with flags and CRC removed
+
+ +---------------------------+
+ | Q.922 Address* |
+ +-- --+
+ | |
+ +---------------------------+
+ | Control (UI = 0x03) |
+ +---------------------------+
+ | Optional Pad (0x00) |
+ +---------------------------+
+ | NLPID |
+ +---------------------------+
+ | . |
+ | . |
+ | . |
+ | Data |
+ | . |
+ | . |
+ +---------------------------+
+
+ * Q.922 addresses, as presently defined, are two octets and
+ contain a 10-bit DLCI. In some networks Q.922 addresses
+ may optionally be increased to three or four octets.
+*/
+
+static u_int
+fr_hdrlen(const u_char *p, u_int addr_len)
+{
+ if (!p[addr_len + 1] /* pad exist */)
+ return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */;
+ else
+ return addr_len + 1 /* UI */ + 1 /* NLPID */;
+}
+
+static void
+fr_hdr_print(int length, u_int addr_len, u_int dlci, u_int8_t *flags, u_int16_t nlpid)
+{
+ if (qflag) {
+ (void)printf("Q.922, DLCI %u, length %u: ",
+ dlci,
+ length);
+ } else {
+ if (nlpid <= 0xff) /* if its smaller than 256 then its a NLPID */
+ (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], NLPID %s (0x%02x), length %u: ",
+ addr_len,
+ dlci,
+ bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
+ tok2str(nlpid_values,"unknown", nlpid),
+ nlpid,
+ length);
+ else /* must be an ethertype */
+ (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ",
+ addr_len,
+ dlci,
+ bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
+ tok2str(ethertype_values, "unknown", nlpid),
+ nlpid,
+ length);
+ }
+}
+
+u_int
+fr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+{
+ register u_int length = h->len;
+ register u_int caplen = h->caplen;
+
+ TCHECK2(*p, 4); /* minimum frame header length */
+
+ if ((length = fr_print(p, length)) == 0)
+ return (0);
+ else
+ return length;
+ trunc:
+ printf("[|fr]");
+ return caplen;
+}
+
+u_int
+fr_print(register const u_char *p, u_int length)
+{
+ u_int16_t extracted_ethertype;
+ u_int dlci;
+ u_int addr_len;
+ u_int16_t nlpid;
+ u_int hdr_len;
+ u_int8_t flags[4];
+
+ if (parse_q922_addr(p, &dlci, &addr_len, flags)) {
+ printf("Q.922, invalid address");
+ return 0;
+ }
+
+ TCHECK2(*p,addr_len+1+1);
+ hdr_len = fr_hdrlen(p, addr_len);
+ TCHECK2(*p,hdr_len);
+
+ if (p[addr_len] != 0x03 && dlci != 0) {
+
+ /* lets figure out if we have cisco style encapsulation: */
+ extracted_ethertype = EXTRACT_16BITS(p+addr_len);
+
+ if (eflag)
+ fr_hdr_print(length, addr_len, dlci, flags, extracted_ethertype);
+
+ if (ethertype_print(gndo, extracted_ethertype,
+ p+addr_len+ETHERTYPE_LEN,
+ length-addr_len-ETHERTYPE_LEN,
+ length-addr_len-ETHERTYPE_LEN) == 0)
+ /* ether_type not known, probably it wasn't one */
+ printf("UI %02x! ", p[addr_len]);
+ else
+ return hdr_len;
+ }
+
+ if (!p[addr_len + 1]) { /* pad byte should be used with 3-byte Q.922 */
+ if (addr_len != 3)
+ printf("Pad! ");
+ } else if (addr_len == 3)
+ printf("No pad! ");
+
+ nlpid = p[hdr_len - 1];
+
+ if (eflag)
+ fr_hdr_print(length, addr_len, dlci, flags, nlpid);
+ p += hdr_len;
+ length -= hdr_len;
+
+ switch (nlpid) {
+ case NLPID_IP:
+ ip_print(gndo, p, length);
+ break;
+
+#ifdef INET6
+ case NLPID_IP6:
+ ip6_print(gndo, p, length);
+ break;
+#endif
+ case NLPID_CLNP:
+ case NLPID_ESIS:
+ case NLPID_ISIS:
+ isoclns_print(p-1, length+1, length+1); /* OSI printers need the NLPID field */
+ break;
+
+ case NLPID_SNAP:
+ if (snap_print(p, length, length, 0) == 0) {
+ /* ether_type not known, print raw packet */
+ if (!eflag)
+ fr_hdr_print(length + hdr_len, hdr_len,
+ dlci, flags, nlpid);
+ if (!suppress_default_print)
+ default_print(p - hdr_len, length + hdr_len);
+ }
+ break;
+
+ case NLPID_Q933:
+ q933_print(p, length);
+ break;
+
+ case NLPID_MFR:
+ frf15_print(p, length);
+ break;
+
+ case NLPID_PPP:
+ ppp_print(p, length);
+ break;
+
+ default:
+ if (!eflag)
+ fr_hdr_print(length + hdr_len, addr_len,
+ dlci, flags, nlpid);
+ if (!xflag)
+ default_print(p, length);
+ }
+
+ return hdr_len;
+
+ trunc:
+ printf("[|fr]");
+ return 0;
+
+}
+
+u_int
+mfr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+{
+ register u_int length = h->len;
+ register u_int caplen = h->caplen;
+
+ TCHECK2(*p, 2); /* minimum frame header length */
+
+ if ((length = mfr_print(p, length)) == 0)
+ return (0);
+ else
+ return length;
+ trunc:
+ printf("[|mfr]");
+ return caplen;
+}
+
+
+#define MFR_CTRL_MSG_ADD_LINK 1
+#define MFR_CTRL_MSG_ADD_LINK_ACK 2
+#define MFR_CTRL_MSG_ADD_LINK_REJ 3
+#define MFR_CTRL_MSG_HELLO 4
+#define MFR_CTRL_MSG_HELLO_ACK 5
+#define MFR_CTRL_MSG_REMOVE_LINK 6
+#define MFR_CTRL_MSG_REMOVE_LINK_ACK 7
+
+struct tok mfr_ctrl_msg_values[] = {
+ { MFR_CTRL_MSG_ADD_LINK, "Add Link" },
+ { MFR_CTRL_MSG_ADD_LINK_ACK, "Add Link ACK" },
+ { MFR_CTRL_MSG_ADD_LINK_REJ, "Add Link Reject" },
+ { MFR_CTRL_MSG_HELLO, "Hello" },
+ { MFR_CTRL_MSG_HELLO_ACK, "Hello ACK" },
+ { MFR_CTRL_MSG_REMOVE_LINK, "Remove Link" },
+ { MFR_CTRL_MSG_REMOVE_LINK_ACK, "Remove Link ACK" },
+ { 0, NULL }
+};
+
+#define MFR_CTRL_IE_BUNDLE_ID 1
+#define MFR_CTRL_IE_LINK_ID 2
+#define MFR_CTRL_IE_MAGIC_NUM 3
+#define MFR_CTRL_IE_TIMESTAMP 5
+#define MFR_CTRL_IE_VENDOR_EXT 6
+#define MFR_CTRL_IE_CAUSE 7
+
+struct tok mfr_ctrl_ie_values[] = {
+ { MFR_CTRL_IE_BUNDLE_ID, "Bundle ID"},
+ { MFR_CTRL_IE_LINK_ID, "Link ID"},
+ { MFR_CTRL_IE_MAGIC_NUM, "Magic Number"},
+ { MFR_CTRL_IE_TIMESTAMP, "Timestamp"},
+ { MFR_CTRL_IE_VENDOR_EXT, "Vendor Extension"},
+ { MFR_CTRL_IE_CAUSE, "Cause"},
+ { 0, NULL }
+};
+
+#define MFR_ID_STRING_MAXLEN 50
+
+struct ie_tlv_header_t {
+ u_int8_t ie_type;
+ u_int8_t ie_len;
+};
+
+u_int
+mfr_print(register const u_char *p, u_int length)
+{
+ u_int tlen,idx,hdr_len = 0;
+ u_int16_t sequence_num;
+ u_int8_t ie_type,ie_len;
+ const u_int8_t *tptr;
+
+
+/*
+ * FRF.16 Link Integrity Control Frame
+ *
+ * 7 6 5 4 3 2 1 0
+ * +----+----+----+----+----+----+----+----+
+ * | B | E | C=1| 0 0 0 0 | EA |
+ * +----+----+----+----+----+----+----+----+
+ * | 0 0 0 0 0 0 0 0 |
+ * +----+----+----+----+----+----+----+----+
+ * | message type |
+ * +----+----+----+----+----+----+----+----+
+ */
+
+ TCHECK2(*p, 4); /* minimum frame header length */
+
+ if ((p[0] & MFR_BEC_MASK) == MFR_CTRL_FRAME && p[1] == 0) {
+ printf("FRF.16 Control, Flags [%s], %s, length %u",
+ bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)),
+ tok2str(mfr_ctrl_msg_values,"Unknown Message (0x%02x)",p[2]),
+ length);
+ tptr = p + 3;
+ tlen = length -3;
+ hdr_len = 3;
+
+ if (!vflag)
+ return hdr_len;
+
+ while (tlen>sizeof(struct ie_tlv_header_t)) {
+ TCHECK2(*tptr, sizeof(struct ie_tlv_header_t));
+ ie_type=tptr[0];
+ ie_len=tptr[1];
+
+ printf("\n\tIE %s (%u), length %u: ",
+ tok2str(mfr_ctrl_ie_values,"Unknown",ie_type),
+ ie_type,
+ ie_len);
+
+ /* infinite loop check */
+ if (ie_type == 0 || ie_len <= sizeof(struct ie_tlv_header_t))
+ return hdr_len;
+
+ TCHECK2(*tptr,ie_len);
+ tptr+=sizeof(struct ie_tlv_header_t);
+ /* tlv len includes header */
+ ie_len-=sizeof(struct ie_tlv_header_t);
+ tlen-=sizeof(struct ie_tlv_header_t);
+
+ switch (ie_type) {
+
+ case MFR_CTRL_IE_MAGIC_NUM:
+ printf("0x%08x",EXTRACT_32BITS(tptr));
+ break;
+
+ case MFR_CTRL_IE_BUNDLE_ID: /* same message format */
+ case MFR_CTRL_IE_LINK_ID:
+ for (idx = 0; idx < ie_len && idx < MFR_ID_STRING_MAXLEN; idx++) {
+ if (*(tptr+idx) != 0) /* don't print null termination */
+ safeputchar(*(tptr+idx));
+ else
+ break;
+ }
+ break;
+
+ case MFR_CTRL_IE_TIMESTAMP:
+ if (ie_len == sizeof(struct timeval)) {
+ ts_print((const struct timeval *)tptr);
+ break;
+ }
+ /* fall through and hexdump if no unix timestamp */
+
+ /*
+ * FIXME those are the defined IEs that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+
+ case MFR_CTRL_IE_VENDOR_EXT:
+ case MFR_CTRL_IE_CAUSE:
+
+ default:
+ if (vflag <= 1)
+ print_unknown_data(tptr,"\n\t ",ie_len);
+ break;
+ }
+
+ /* do we want to see a hexdump of the IE ? */
+ if (vflag > 1 )
+ print_unknown_data(tptr,"\n\t ",ie_len);
+
+ tlen-=ie_len;
+ tptr+=ie_len;
+ }
+ return hdr_len;
+ }
+/*
+ * FRF.16 Fragmentation Frame
+ *
+ * 7 6 5 4 3 2 1 0
+ * +----+----+----+----+----+----+----+----+
+ * | B | E | C=0|seq. (high 4 bits) | EA |
+ * +----+----+----+----+----+----+----+----+
+ * | sequence (low 8 bits) |
+ * +----+----+----+----+----+----+----+----+
+ * | DLCI (6 bits) | CR | EA |
+ * +----+----+----+----+----+----+----+----+
+ * | DLCI (4 bits) |FECN|BECN| DE | EA |
+ * +----+----+----+----+----+----+----+----+
+ */
+
+ sequence_num = (p[0]&0x1e)<<7 | p[1];
+ /* whole packet or first fragment ? */
+ if ((p[0] & MFR_BEC_MASK) == MFR_FRAG_FRAME ||
+ (p[0] & MFR_BEC_MASK) == MFR_B_BIT) {
+ printf("FRF.16 Frag, seq %u, Flags [%s], ",
+ sequence_num,
+ bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
+ hdr_len = 2;
+ fr_print(p+hdr_len,length-hdr_len);
+ return hdr_len;
+ }
+
+ /* must be a middle or the last fragment */
+ printf("FRF.16 Frag, seq %u, Flags [%s]",
+ sequence_num,
+ bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)));
+ print_unknown_data(p,"\n\t",length);
+
+ return hdr_len;
+
+ trunc:
+ printf("[|mfr]");
+ return length;
+}
+
+/* an NLPID of 0xb1 indicates a 2-byte
+ * FRF.15 header
+ *
+ * 7 6 5 4 3 2 1 0
+ * +----+----+----+----+----+----+----+----+
+ * ~ Q.922 header ~
+ * +----+----+----+----+----+----+----+----+
+ * | NLPID (8 bits) | NLPID=0xb1
+ * +----+----+----+----+----+----+----+----+
+ * | B | E | C |seq. (high 4 bits) | R |
+ * +----+----+----+----+----+----+----+----+
+ * | sequence (low 8 bits) |
+ * +----+----+----+----+----+----+----+----+
+ */
+
+#define FR_FRF15_FRAGTYPE 0x01
+
+static void
+frf15_print (const u_char *p, u_int length) {
+
+ u_int16_t sequence_num, flags;
+
+ flags = p[0]&MFR_BEC_MASK;
+ sequence_num = (p[0]&0x1e)<<7 | p[1];
+
+ printf("FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u",
+ sequence_num,
+ bittok2str(frf_flag_values,"none",flags),
+ p[0]&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End",
+ length);
+
+/* TODO:
+ * depending on all permutations of the B, E and C bit
+ * dig as deep as we can - e.g. on the first (B) fragment
+ * there is enough payload to print the IP header
+ * on non (B) fragments it depends if the fragmentation
+ * model is end-to-end or interface based wether we want to print
+ * another Q.922 header
+ */
+
+}
+
+/*
+ * Q.933 decoding portion for framerelay specific.
+ */
+
+/* Q.933 packet format
+ Format of Other Protocols
+ using Q.933 NLPID
+ +-------------------------------+
+ | Q.922 Address |
+ +---------------+---------------+
+ |Control 0x03 | NLPID 0x08 |
+ +---------------+---------------+
+ | L2 Protocol ID |
+ | octet 1 | octet 2 |
+ +-------------------------------+
+ | L3 Protocol ID |
+ | octet 2 | octet 2 |
+ +-------------------------------+
+ | Protocol Data |
+ +-------------------------------+
+ | FCS |
+ +-------------------------------+
+ */
+
+/* L2 (Octet 1)- Call Reference Usually is 0x0 */
+
+/*
+ * L2 (Octet 2)- Message Types definition 1 byte long.
+ */
+/* Call Establish */
+#define MSG_TYPE_ESC_TO_NATIONAL 0x00
+#define MSG_TYPE_ALERT 0x01
+#define MSG_TYPE_CALL_PROCEEDING 0x02
+#define MSG_TYPE_CONNECT 0x07
+#define MSG_TYPE_CONNECT_ACK 0x0F
+#define MSG_TYPE_PROGRESS 0x03
+#define MSG_TYPE_SETUP 0x05
+/* Call Clear */
+#define MSG_TYPE_DISCONNECT 0x45
+#define MSG_TYPE_RELEASE 0x4D
+#define MSG_TYPE_RELEASE_COMPLETE 0x5A
+#define MSG_TYPE_RESTART 0x46
+#define MSG_TYPE_RESTART_ACK 0x4E
+/* Status */
+#define MSG_TYPE_STATUS 0x7D
+#define MSG_TYPE_STATUS_ENQ 0x75
+
+struct tok fr_q933_msg_values[] = {
+ { MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" },
+ { MSG_TYPE_ALERT, "Alert" },
+ { MSG_TYPE_CALL_PROCEEDING, "Call proceeding" },
+ { MSG_TYPE_CONNECT, "Connect" },
+ { MSG_TYPE_CONNECT_ACK, "Connect ACK" },
+ { MSG_TYPE_PROGRESS, "Progress" },
+ { MSG_TYPE_SETUP, "Setup" },
+ { MSG_TYPE_DISCONNECT, "Disconnect" },
+ { MSG_TYPE_RELEASE, "Release" },
+ { MSG_TYPE_RELEASE_COMPLETE, "Release Complete" },
+ { MSG_TYPE_RESTART, "Restart" },
+ { MSG_TYPE_RESTART_ACK, "Restart ACK" },
+ { MSG_TYPE_STATUS, "Status Reply" },
+ { MSG_TYPE_STATUS_ENQ, "Status Enquiry" },
+ { 0, NULL }
+};
+
+#define MSG_ANSI_LOCKING_SHIFT 0x95
+
+#define FR_LMI_ANSI_REPORT_TYPE_IE 0x01
+#define FR_LMI_ANSI_LINK_VERIFY_IE_91 0x19 /* details? */
+#define FR_LMI_ANSI_LINK_VERIFY_IE 0x03
+#define FR_LMI_ANSI_PVC_STATUS_IE 0x07
+
+#define FR_LMI_CCITT_REPORT_TYPE_IE 0x51
+#define FR_LMI_CCITT_LINK_VERIFY_IE 0x53
+#define FR_LMI_CCITT_PVC_STATUS_IE 0x57
+
+struct tok fr_q933_ie_values_codeset5[] = {
+ { FR_LMI_ANSI_REPORT_TYPE_IE, "ANSI Report Type" },
+ { FR_LMI_ANSI_LINK_VERIFY_IE_91, "ANSI Link Verify" },
+ { FR_LMI_ANSI_LINK_VERIFY_IE, "ANSI Link Verify" },
+ { FR_LMI_ANSI_PVC_STATUS_IE, "ANSI PVC Status" },
+ { FR_LMI_CCITT_REPORT_TYPE_IE, "CCITT Report Type" },
+ { FR_LMI_CCITT_LINK_VERIFY_IE, "CCITT Link Verify" },
+ { FR_LMI_CCITT_PVC_STATUS_IE, "CCITT PVC Status" },
+ { 0, NULL }
+};
+
+#define FR_LMI_REPORT_TYPE_IE_FULL_STATUS 0
+#define FR_LMI_REPORT_TYPE_IE_LINK_VERIFY 1
+#define FR_LMI_REPORT_TYPE_IE_ASYNC_PVC 2
+
+struct tok fr_lmi_report_type_ie_values[] = {
+ { FR_LMI_REPORT_TYPE_IE_FULL_STATUS, "Full Status" },
+ { FR_LMI_REPORT_TYPE_IE_LINK_VERIFY, "Link verify" },
+ { FR_LMI_REPORT_TYPE_IE_ASYNC_PVC, "Async PVC Status" },
+ { 0, NULL }
+};
+
+/* array of 16 codepages - currently we only support codepage 1,5 */
+static struct tok *fr_q933_ie_codesets[] = {
+ NULL,
+ fr_q933_ie_values_codeset5,
+ NULL,
+ NULL,
+ NULL,
+ fr_q933_ie_values_codeset5,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+static int fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p,
+ const u_char *p);
+
+typedef int (*codeset_pr_func_t)(const struct ie_tlv_header_t *ie_p,
+ const u_char *p);
+
+/* array of 16 codepages - currently we only support codepage 1,5 */
+static codeset_pr_func_t fr_q933_print_ie_codeset[] = {
+ NULL,
+ fr_q933_print_ie_codeset5,
+ NULL,
+ NULL,
+ NULL,
+ fr_q933_print_ie_codeset5,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+void
+q933_print(const u_char *p, u_int length)
+{
+ const u_char *ptemp = p;
+ struct ie_tlv_header_t *ie_p;
+ int olen;
+ int is_ansi = 0;
+ u_int codeset;
+ u_int ie_is_known = 0;
+
+ if (length < 9) { /* shortest: Q.933a LINK VERIFY */
+ printf("[|q.933]");
+ return;
+ }
+
+ codeset = p[2]&0x0f; /* extract the codeset */
+
+ if (p[2] == MSG_ANSI_LOCKING_SHIFT) {
+ is_ansi = 1;
+ }
+
+ printf("%s", eflag ? "" : "Q.933, ");
+
+ /* printing out header part */
+ printf("%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset);
+
+ if (p[0]) {
+ printf(", Call Ref: 0x%02x", p[0]);
+ }
+ if (vflag) {
+ printf(", %s (0x%02x), length %u",
+ tok2str(fr_q933_msg_values,
+ "unknown message", p[1]),
+ p[1],
+ length);
+ } else {
+ printf(", %s",
+ tok2str(fr_q933_msg_values,
+ "unknown message 0x%02x", p[1]));
+ }
+
+ olen = length; /* preserve the original length for non verbose mode */
+
+ if (length < (u_int)(2 - is_ansi)) {
+ printf("[|q.933]");
+ return;
+ }
+ length -= 2 + is_ansi;
+ ptemp += 2 + is_ansi;
+
+ /* Loop through the rest of IE */
+ while (length > sizeof(struct ie_tlv_header_t)) {
+ ie_p = (struct ie_tlv_header_t *)ptemp;
+ if (length < sizeof(struct ie_tlv_header_t) ||
+ length < sizeof(struct ie_tlv_header_t) + ie_p->ie_len) {
+ if (vflag) { /* not bark if there is just a trailer */
+ printf("\n[|q.933]");
+ } else {
+ printf(", length %u",olen);
+ }
+ return;
+ }
+
+ /* lets do the full IE parsing only in verbose mode
+ * however some IEs (DLCI Status, Link Verify)
+ * are also interestting in non-verbose mode */
+ if (vflag) {
+ printf("\n\t%s IE (0x%02x), length %u: ",
+ tok2str(fr_q933_ie_codesets[codeset],
+ "unknown", ie_p->ie_type),
+ ie_p->ie_type,
+ ie_p->ie_len);
+ }
+
+ /* sanity check */
+ if (ie_p->ie_type == 0 || ie_p->ie_len == 0) {
+ return;
+ }
+
+ if (fr_q933_print_ie_codeset[codeset] != NULL) {
+ ie_is_known = fr_q933_print_ie_codeset[codeset](ie_p, ptemp);
+ }
+
+ if (vflag >= 1 && !ie_is_known) {
+ print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len);
+ }
+
+ /* do we want to see a hexdump of the IE ? */
+ if (vflag> 1 && ie_is_known) {
+ print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len);
+ }
+
+ length = length - ie_p->ie_len - 2;
+ ptemp = ptemp + ie_p->ie_len + 2;
+ }
+ if (!vflag) {
+ printf(", length %u",olen);
+ }
+}
+
+static int
+fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p)
+{
+ u_int dlci;
+
+ switch (ie_p->ie_type) {
+
+ case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */
+ case FR_LMI_CCITT_REPORT_TYPE_IE:
+ if (vflag) {
+ printf("%s (%u)",
+ tok2str(fr_lmi_report_type_ie_values,"unknown",p[2]),
+ p[2]);
+ }
+ return 1;
+
+ case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */
+ case FR_LMI_CCITT_LINK_VERIFY_IE:
+ case FR_LMI_ANSI_LINK_VERIFY_IE_91:
+ if (!vflag) {
+ printf(", ");
+ }
+ printf("TX Seq: %3d, RX Seq: %3d", p[2], p[3]);
+ return 1;
+
+ case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */
+ case FR_LMI_CCITT_PVC_STATUS_IE:
+ if (!vflag) {
+ printf(", ");
+ }
+ /* now parse the DLCI information element. */
+ if ((ie_p->ie_len < 3) ||
+ (p[2] & 0x80) ||
+ ((ie_p->ie_len == 3) && !(p[3] & 0x80)) ||
+ ((ie_p->ie_len == 4) && ((p[3] & 0x80) || !(p[4] & 0x80))) ||
+ ((ie_p->ie_len == 5) && ((p[3] & 0x80) || (p[4] & 0x80) ||
+ !(p[5] & 0x80))) ||
+ (ie_p->ie_len > 5) ||
+ !(p[ie_p->ie_len + 1] & 0x80)) {
+ printf("Invalid DLCI IE");
+ }
+
+ dlci = ((p[2] & 0x3F) << 4) | ((p[3] & 0x78) >> 3);
+ if (ie_p->ie_len == 4) {
+ dlci = (dlci << 6) | ((p[4] & 0x7E) >> 1);
+ }
+ else if (ie_p->ie_len == 5) {
+ dlci = (dlci << 13) | (p[4] & 0x7F) | ((p[5] & 0x7E) >> 1);
+ }
+
+ printf("DLCI %u: status %s%s", dlci,
+ p[ie_p->ie_len + 1] & 0x8 ? "New, " : "",
+ p[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive");
+ return 1;
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 14:43:40 +0000