470 lines
14 KiB
C
470 lines
14 KiB
C
/* toshiba.c
|
||
*
|
||
* Wiretap Library
|
||
* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
|
||
*
|
||
* SPDX-License-Identifier: GPL-2.0-or-later
|
||
*/
|
||
|
||
#include "config.h"
|
||
#include "wtap-int.h"
|
||
#include "toshiba.h"
|
||
#include "file_wrappers.h"
|
||
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
|
||
/* This module reads the output of the 'snoop' command in the Toshiba
|
||
* TR-600 and TR-650 "Compact" ISDN Routers. You can telnet to the
|
||
* router and run 'snoop' on the different channels, and at different
|
||
* detail levels. Be sure to choose the 'dump' level to get the hex dump.
|
||
* The 'snoop' command has nothing to do with the Solaris 'snoop'
|
||
* command, except that they both capture packets.
|
||
*/
|
||
|
||
/*
|
||
Example 'snoop' output data:
|
||
|
||
Script started on Thu Sep 9 21:48:49 1999
|
||
]0;gram@nirvana:/tmp$ telnet 10.0.0.254
|
||
Trying 10.0.0.254...
|
||
Connected to 10.0.0.254.
|
||
Escape character is '^]'.
|
||
|
||
|
||
TR-600(tr600) System Console
|
||
|
||
Login:admin
|
||
Password:*******
|
||
*--------------------------------------------------------*
|
||
| T O S H I B A T R - 6 0 0 |
|
||
| < Compact Router > |
|
||
| V1.02.02 |
|
||
| |
|
||
| (C) Copyright TOSHIBA Corp. 1997 All rights reserved. |
|
||
*--------------------------------------------------------*
|
||
|
||
tr600>snoop dump b1
|
||
Trace start?(on/off/dump/dtl)->dump
|
||
IP Address?->b1
|
||
B1 Port Filetering
|
||
Trace start(Dump Mode)...
|
||
|
||
tr600>[No.1] 00:00:09.14 B1:1 Tx 207.193.26.136->151.164.1.8 DNS SPORT=1028 LEN=38 CHKSUM=4FD4 ID=2390 Query RD QCNT=1 pow.zing.org?
|
||
OFFSET 0001-0203-0405-0607-0809-0A0B-0C0D-0E0F 0123456789ABCDEF LEN=67
|
||
0000 : FF03 003D C000 0008 2145 0000 3A12 6500 ...=....!E..:.e.
|
||
0010 : 003F 11E6 58CF C11A 8897 A401 0804 0400 .?..X...........
|
||
0020 : 3500 264F D409 5601 0000 0100 0000 0000 5.&O..V.........
|
||
0030 : 0003 706F 7704 7A69 6E67 036F 7267 0000 ..pow.zing.org..
|
||
0040 : 0100 01 ...
|
||
|
||
[No.2] 00:00:09.25 B1:1 Rx 151.164.1.8->207.193.26.136 DNS DPORT=1028 LEN=193 CHKSUM=3E06 ID=2390 Answer RD RA QCNT=1 pow.zing.org? ANCNT=1 pow.zing.org=206.57.36.90 TTL=2652
|
||
OFFSET 0001-0203-0405-0607-0809-0A0B-0C0D-0E0F 0123456789ABCDEF LEN=222
|
||
0000 : FF03 003D C000 0013 2145 0000 D590 9340 ...=....!E.....@
|
||
0010 : 00F7 116F 8E97 A401 08CF C11A 8800 3504 ...o..........5.
|
||
0020 : 0400 C13E 0609 5681 8000 0100 0100 0300 ...>..V.........
|
||
0030 : 0303 706F 7704 7A69 6E67 036F 7267 0000 ..pow.zing.org..
|
||
0040 : 0100 01C0 0C00 0100 0100 000A 5C00 04CE ............\...
|
||
0050 : 3924 5A04 5A49 4E47 036F 7267 0000 0200 9$Z.ZING.org....
|
||
0060 : 0100 016F 5B00 0D03 4841 4E03 5449 5703 ...o[...HAN.TIW.
|
||
0070 : 4E45 5400 C02E 0002 0001 0001 6F5B 0006 NET.........o[..
|
||
0080 : 034E 5331 C02E C02E 0002 0001 0001 6F5B .NS1..........o[
|
||
0090 : 001C 0854 414C 4945 5349 4E0D 434F 4E46 ...TALIESIN.CONF
|
||
00A0 : 4142 554C 4154 494F 4E03 434F 4D00 C042 ABULATION.COM..B
|
||
00B0 : 0001 0001 0001 51EC 0004 CE39 2406 C05B ......Q....9$..[
|
||
00C0 : 0001 0001 0001 6F5B 0004 CE39 245A C06D ......o[...9$Z.m
|
||
00D0 : 0001 0001 0001 4521 0004 187C 1F01 ......E!...|..
|
||
|
||
*/
|
||
|
||
/* Magic text to check for toshiba-ness of file */
|
||
static const char toshiba_hdr_magic[] =
|
||
{ 'T', ' ', 'O', ' ', 'S', ' ', 'H', ' ', 'I', ' ', 'B', ' ', 'A' };
|
||
#define TOSHIBA_HDR_MAGIC_SIZE (sizeof toshiba_hdr_magic / sizeof toshiba_hdr_magic[0])
|
||
|
||
/* Magic text for start of packet */
|
||
static const char toshiba_rec_magic[] = { '[', 'N', 'o', '.' };
|
||
#define TOSHIBA_REC_MAGIC_SIZE (sizeof toshiba_rec_magic / sizeof toshiba_rec_magic[0])
|
||
|
||
static gboolean toshiba_read(wtap *wth, wtap_rec *rec, Buffer *buf,
|
||
int *err, gchar **err_info, gint64 *data_offset);
|
||
static gboolean toshiba_seek_read(wtap *wth, gint64 seek_off,
|
||
wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
|
||
static gboolean parse_single_hex_dump_line(char* rec, guint8 *buf,
|
||
guint byte_offset);
|
||
static gboolean parse_toshiba_packet(FILE_T fh, wtap_rec *rec,
|
||
Buffer *buf, int *err, gchar **err_info);
|
||
|
||
static int toshiba_file_type_subtype = -1;
|
||
|
||
void register_toshiba(void);
|
||
|
||
/* Seeks to the beginning of the next packet, and returns the
|
||
byte offset. Returns -1 on failure, and sets "*err" to the error
|
||
and "*err_info" to null or an additional error string. */
|
||
static gint64 toshiba_seek_next_packet(wtap *wth, int *err, gchar **err_info)
|
||
{
|
||
int byte;
|
||
guint level = 0;
|
||
gint64 cur_off;
|
||
|
||
while ((byte = file_getc(wth->fh)) != EOF) {
|
||
if (byte == toshiba_rec_magic[level]) {
|
||
level++;
|
||
if (level >= TOSHIBA_REC_MAGIC_SIZE) {
|
||
/* note: we're leaving file pointer right after the magic characters */
|
||
cur_off = file_tell(wth->fh);
|
||
if (cur_off == -1) {
|
||
/* Error. */
|
||
*err = file_error(wth->fh, err_info);
|
||
return -1;
|
||
}
|
||
return cur_off + 1;
|
||
}
|
||
} else {
|
||
level = 0;
|
||
}
|
||
}
|
||
/* EOF or error. */
|
||
*err = file_error(wth->fh, err_info);
|
||
return -1;
|
||
}
|
||
|
||
#define TOSHIBA_HEADER_LINES_TO_CHECK 200
|
||
#define TOSHIBA_LINE_LENGTH 240
|
||
|
||
/* Look through the first part of a file to see if this is
|
||
* a Toshiba trace file.
|
||
*
|
||
* Returns TRUE if it is, FALSE if it isn't or if we get an I/O error;
|
||
* if we get an I/O error, "*err" will be set to a non-zero value and
|
||
* "*err_info" will be set to null or an additional error string.
|
||
*/
|
||
static gboolean toshiba_check_file_type(wtap *wth, int *err, gchar **err_info)
|
||
{
|
||
char buf[TOSHIBA_LINE_LENGTH];
|
||
guint i, reclen, level, line;
|
||
char byte;
|
||
|
||
buf[TOSHIBA_LINE_LENGTH-1] = 0;
|
||
|
||
for (line = 0; line < TOSHIBA_HEADER_LINES_TO_CHECK; line++) {
|
||
if (file_gets(buf, TOSHIBA_LINE_LENGTH, wth->fh) == NULL) {
|
||
/* EOF or error. */
|
||
*err = file_error(wth->fh, err_info);
|
||
return FALSE;
|
||
}
|
||
|
||
reclen = (guint) strlen(buf);
|
||
if (reclen < TOSHIBA_HDR_MAGIC_SIZE) {
|
||
continue;
|
||
}
|
||
|
||
level = 0;
|
||
for (i = 0; i < reclen; i++) {
|
||
byte = buf[i];
|
||
if (byte == toshiba_hdr_magic[level]) {
|
||
level++;
|
||
if (level >= TOSHIBA_HDR_MAGIC_SIZE) {
|
||
return TRUE;
|
||
}
|
||
}
|
||
else {
|
||
level = 0;
|
||
}
|
||
}
|
||
}
|
||
*err = 0;
|
||
return FALSE;
|
||
}
|
||
|
||
|
||
wtap_open_return_val toshiba_open(wtap *wth, int *err, gchar **err_info)
|
||
{
|
||
/* Look for Toshiba header */
|
||
if (!toshiba_check_file_type(wth, err, err_info)) {
|
||
if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
|
||
return WTAP_OPEN_ERROR;
|
||
return WTAP_OPEN_NOT_MINE;
|
||
}
|
||
|
||
wth->file_encap = WTAP_ENCAP_PER_PACKET;
|
||
wth->file_type_subtype = toshiba_file_type_subtype;
|
||
wth->snapshot_length = 0; /* not known */
|
||
wth->subtype_read = toshiba_read;
|
||
wth->subtype_seek_read = toshiba_seek_read;
|
||
wth->file_tsprec = WTAP_TSPREC_CSEC;
|
||
|
||
return WTAP_OPEN_MINE;
|
||
}
|
||
|
||
/* Find the next packet and parse it; called from wtap_read(). */
|
||
static gboolean toshiba_read(wtap *wth, wtap_rec *rec, Buffer *buf,
|
||
int *err, gchar **err_info, gint64 *data_offset)
|
||
{
|
||
gint64 offset;
|
||
|
||
/* Find the next packet */
|
||
offset = toshiba_seek_next_packet(wth, err, err_info);
|
||
if (offset < 1)
|
||
return FALSE;
|
||
*data_offset = offset;
|
||
|
||
/* Parse the packet */
|
||
return parse_toshiba_packet(wth->fh, rec, buf, err, err_info);
|
||
}
|
||
|
||
/* Used to read packets in random-access fashion */
|
||
static gboolean
|
||
toshiba_seek_read(wtap *wth, gint64 seek_off,
|
||
wtap_rec *rec, Buffer *buf,
|
||
int *err, gchar **err_info)
|
||
{
|
||
if (file_seek(wth->random_fh, seek_off - 1, SEEK_SET, err) == -1)
|
||
return FALSE;
|
||
|
||
if (!parse_toshiba_packet(wth->random_fh, rec, buf, err, err_info)) {
|
||
if (*err == 0)
|
||
*err = WTAP_ERR_SHORT_READ;
|
||
return FALSE;
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* Parses a packet. */
|
||
static gboolean
|
||
parse_toshiba_packet(FILE_T fh, wtap_rec *rec, Buffer *buf,
|
||
int *err, gchar **err_info)
|
||
{
|
||
union wtap_pseudo_header *pseudo_header = &rec->rec_header.packet_header.pseudo_header;
|
||
char line[TOSHIBA_LINE_LENGTH];
|
||
int num_items_scanned;
|
||
int pkt_len, pktnum, hr, min, sec, csec;
|
||
char channel[10], direction[10];
|
||
int i, hex_lines;
|
||
guint8 *pd;
|
||
|
||
/* Our file pointer should be on the line containing the
|
||
* summary information for a packet. Read in that line and
|
||
* extract the useful information
|
||
*/
|
||
if (file_gets(line, TOSHIBA_LINE_LENGTH, fh) == NULL) {
|
||
*err = file_error(fh, err_info);
|
||
if (*err == 0) {
|
||
*err = WTAP_ERR_SHORT_READ;
|
||
}
|
||
return FALSE;
|
||
}
|
||
|
||
/* Find text in line after "[No.". Limit the length of the
|
||
* two strings since we have fixed buffers for channel[] and
|
||
* direction[] */
|
||
num_items_scanned = sscanf(line, "%9d] %2d:%2d:%2d.%9d %9s %9s",
|
||
&pktnum, &hr, &min, &sec, &csec, channel, direction);
|
||
|
||
if (num_items_scanned != 7) {
|
||
*err = WTAP_ERR_BAD_FILE;
|
||
*err_info = g_strdup("toshiba: record header isn't valid");
|
||
return FALSE;
|
||
}
|
||
|
||
/* Scan lines until we find the OFFSET line. In a "telnet" trace,
|
||
* this will be the next line. But if you save your telnet session
|
||
* to a file from within a Windows-based telnet client, it may
|
||
* put in line breaks at 80 columns (or however big your "telnet" box
|
||
* is). CRT (a Windows telnet app from VanDyke) does this.
|
||
* Here we assume that 80 columns will be the minimum size, and that
|
||
* the OFFSET line is not broken in the middle. It's the previous
|
||
* line that is normally long and can thus be broken at column 80.
|
||
*/
|
||
do {
|
||
if (file_gets(line, TOSHIBA_LINE_LENGTH, fh) == NULL) {
|
||
*err = file_error(fh, err_info);
|
||
if (*err == 0) {
|
||
*err = WTAP_ERR_SHORT_READ;
|
||
}
|
||
return FALSE;
|
||
}
|
||
|
||
/* Check for "OFFSET 0001-0203" at beginning of line */
|
||
line[16] = '\0';
|
||
|
||
} while (strcmp(line, "OFFSET 0001-0203") != 0);
|
||
|
||
num_items_scanned = sscanf(line+64, "LEN=%9d", &pkt_len);
|
||
if (num_items_scanned != 1) {
|
||
*err = WTAP_ERR_BAD_FILE;
|
||
*err_info = g_strdup("toshiba: OFFSET line doesn't have valid LEN item");
|
||
return FALSE;
|
||
}
|
||
if (pkt_len < 0) {
|
||
*err = WTAP_ERR_BAD_FILE;
|
||
*err_info = g_strdup("toshiba: packet header has a negative packet length");
|
||
return FALSE;
|
||
}
|
||
if ((guint)pkt_len > WTAP_MAX_PACKET_SIZE_STANDARD) {
|
||
/*
|
||
* Probably a corrupt capture file; don't blow up trying
|
||
* to allocate space for an immensely-large packet.
|
||
*/
|
||
*err = WTAP_ERR_BAD_FILE;
|
||
*err_info = g_strdup_printf("toshiba: File has %u-byte packet, bigger than maximum of %u",
|
||
(guint)pkt_len, WTAP_MAX_PACKET_SIZE_STANDARD);
|
||
return FALSE;
|
||
}
|
||
|
||
rec->rec_type = REC_TYPE_PACKET;
|
||
rec->block = wtap_block_create(WTAP_BLOCK_PACKET);
|
||
rec->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN;
|
||
rec->ts.secs = hr * 3600 + min * 60 + sec;
|
||
rec->ts.nsecs = csec * 10000000;
|
||
rec->rec_header.packet_header.caplen = pkt_len;
|
||
rec->rec_header.packet_header.len = pkt_len;
|
||
|
||
switch (channel[0]) {
|
||
case 'B':
|
||
rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_ISDN;
|
||
pseudo_header->isdn.uton = (direction[0] == 'T');
|
||
pseudo_header->isdn.channel = (guint8)
|
||
strtol(&channel[1], NULL, 10);
|
||
break;
|
||
|
||
case 'D':
|
||
rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_ISDN;
|
||
pseudo_header->isdn.uton = (direction[0] == 'T');
|
||
pseudo_header->isdn.channel = 0;
|
||
break;
|
||
|
||
default:
|
||
rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_ETHERNET;
|
||
/* XXX - is there an FCS in the frame? */
|
||
pseudo_header->eth.fcs_len = -1;
|
||
break;
|
||
}
|
||
|
||
/* Make sure we have enough room for the packet */
|
||
ws_buffer_assure_space(buf, pkt_len);
|
||
pd = ws_buffer_start_ptr(buf);
|
||
|
||
/* Calculate the number of hex dump lines, each
|
||
* containing 16 bytes of data */
|
||
hex_lines = pkt_len / 16 + ((pkt_len % 16) ? 1 : 0);
|
||
|
||
for (i = 0; i < hex_lines; i++) {
|
||
if (file_gets(line, TOSHIBA_LINE_LENGTH, fh) == NULL) {
|
||
*err = file_error(fh, err_info);
|
||
if (*err == 0) {
|
||
*err = WTAP_ERR_SHORT_READ;
|
||
}
|
||
return FALSE;
|
||
}
|
||
if (!parse_single_hex_dump_line(line, pd, i * 16)) {
|
||
*err = WTAP_ERR_BAD_FILE;
|
||
*err_info = g_strdup("toshiba: hex dump not valid");
|
||
return FALSE;
|
||
}
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/*
|
||
1 2 3 4
|
||
0123456789012345678901234567890123456789012345
|
||
0000 : FF03 003D C000 0008 2145 0000 3A12 6500 ...=....!E..:.e.
|
||
0010 : 003F 11E6 58CF C11A 8897 A401 0804 0400 .?..X...........
|
||
0020 : 0100 01 ...
|
||
*/
|
||
|
||
#define START_POS 7
|
||
#define HEX_LENGTH ((8 * 4) + 7) /* eight clumps of 4 bytes with 7 inner spaces */
|
||
|
||
/* Take a string representing one line from a hex dump and converts the
|
||
* text to binary data. We check the printed offset with the offset
|
||
* we are passed to validate the record. We place the bytes in the buffer
|
||
* at the specified offset.
|
||
*
|
||
* In the process, we're going to write all over the string.
|
||
*
|
||
* Returns TRUE if good hex dump, FALSE if bad.
|
||
*/
|
||
static gboolean
|
||
parse_single_hex_dump_line(char* rec, guint8 *buf, guint byte_offset) {
|
||
|
||
int pos, i;
|
||
char *s;
|
||
unsigned long value;
|
||
guint16 word_value;
|
||
|
||
/* Get the byte_offset directly from the record */
|
||
rec[4] = '\0';
|
||
s = rec;
|
||
value = strtoul(s, NULL, 16);
|
||
|
||
if (value != byte_offset) {
|
||
return FALSE;
|
||
}
|
||
|
||
/* Go through the substring representing the values and:
|
||
* 1. Replace any spaces with '0's
|
||
* 2. Place \0's every 5 bytes (to terminate the string)
|
||
*
|
||
* Then read the eight sets of hex bytes
|
||
*/
|
||
|
||
for (pos = START_POS; pos < START_POS + HEX_LENGTH; pos++) {
|
||
if (rec[pos] == ' ') {
|
||
rec[pos] = '0';
|
||
}
|
||
}
|
||
|
||
pos = START_POS;
|
||
for (i = 0; i < 8; i++) {
|
||
rec[pos+4] = '\0';
|
||
|
||
word_value = (guint16) strtoul(&rec[pos], NULL, 16);
|
||
buf[byte_offset + i * 2 + 0] = (guint8) (word_value >> 8);
|
||
buf[byte_offset + i * 2 + 1] = (guint8) (word_value & 0x00ff);
|
||
pos += 5;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static const struct supported_block_type toshiba_blocks_supported[] = {
|
||
/*
|
||
* We support packet blocks, with no comments or other options.
|
||
*/
|
||
{ WTAP_BLOCK_PACKET, MULTIPLE_BLOCKS_SUPPORTED, NO_OPTIONS_SUPPORTED }
|
||
};
|
||
|
||
static const struct file_type_subtype_info toshiba_info = {
|
||
"Toshiba Compact ISDN Router snoop", "toshiba", "txt", NULL,
|
||
FALSE, BLOCKS_SUPPORTED(toshiba_blocks_supported),
|
||
NULL, NULL, NULL
|
||
};
|
||
|
||
void register_toshiba(void)
|
||
{
|
||
toshiba_file_type_subtype = wtap_register_file_type_subtype(&toshiba_info);
|
||
|
||
/*
|
||
* Register name for backwards compatibility with the
|
||
* wtap_filetypes table in Lua.
|
||
*/
|
||
wtap_register_backwards_compatibility_lua_name("TOSHIBA",
|
||
toshiba_file_type_subtype);
|
||
}
|
||
|
||
/*
|
||
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
||
*
|
||
* Local variables:
|
||
* c-basic-offset: 8
|
||
* tab-width: 8
|
||
* indent-tabs-mode: t
|
||
* End:
|
||
*
|
||
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
||
* :indentSize=8:tabSize=8:noTabs=false:
|
||
*/
|