834 lines
25 KiB
C
834 lines
25 KiB
C
/*
|
|
* 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 1.32.2.12 2005/08/23 03:15:51 guy 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 *sdlcore,
|
|
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;
|
|
|
|
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;
|
|
|
|
if (p[0] & 0x02)
|
|
*sdlcore = p[0] >> 2;
|
|
else
|
|
*dlci = (*dlci << 6) | (p[0] >> 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 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 sdlcore;
|
|
u_int addr_len;
|
|
u_int16_t nlpid;
|
|
u_int hdr_len;
|
|
u_int8_t flags[4];
|
|
|
|
if (parse_q922_addr(p, &dlci, &sdlcore, &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 (ether_encap_print(extracted_ethertype,
|
|
p+addr_len+ETHERTYPE_LEN,
|
|
length-addr_len-ETHERTYPE_LEN,
|
|
length-addr_len-ETHERTYPE_LEN,
|
|
&extracted_ethertype) == 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(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, &extracted_ethertype, 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;
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
#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 intereststing 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;
|
|
}
|