![Guy Harris](/assets/img/avatar_default.png)
by the gunzipping code. Have it also supply a err_info string, and report it. Have file_error() supply an err_info string. Put "the file" - or, for WTAP_ERR_DECOMPRESS, "the compressed file", to suggest a decompression error - into the rawshark and tshark errors, along the lines of what other programs print. Fix a case in the Netscaler code where we weren't fetching the error code on a read failure. svn path=/trunk/; revision=36748
480 lines
14 KiB
C
480 lines
14 KiB
C
/* toshiba.c
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*
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* $Id$
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "wtap-int.h"
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#include "buffer.h"
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#include "toshiba.h"
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#include "file_wrappers.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* This module reads the output of the 'snoop' command in the Toshiba
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* TR-600 and TR-650 "Compact" ISDN Routers. You can telnet to the
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* router and run 'snoop' on the different channels, and at different
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* detail levels. Be sure to choose the 'dump' level to get the hex dump.
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* The 'snoop' command has nothing to do with the Solaris 'snoop'
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* command, except that they both capture packets.
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*/
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/*
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Example 'snoop' output data:
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Script started on Thu Sep 9 21:48:49 1999
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]0;gram@nirvana:/tmp$ telnet 10.0.0.254
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Trying 10.0.0.254...
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Connected to 10.0.0.254.
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Escape character is '^]'.
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TR-600(tr600) System Console
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Login:admin
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Password:*******
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*--------------------------------------------------------*
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| T O S H I B A T R - 6 0 0 |
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| < Compact Router > |
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| V1.02.02 |
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| |
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| (C) Copyright TOSHIBA Corp. 1997 All rights reserved. |
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*--------------------------------------------------------*
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tr600>snoop dump b1
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Trace start?(on/off/dump/dtl)->dump
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IP Address?->b1
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B1 Port Filetering
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Trace start(Dump Mode)...
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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?
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OFFSET 0001-0203-0405-0607-0809-0A0B-0C0D-0E0F 0123456789ABCDEF LEN=67
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0000 : FF03 003D C000 0008 2145 0000 3A12 6500 ...=....!E..:.e.
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0010 : 003F 11E6 58CF C11A 8897 A401 0804 0400 .?..X...........
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0020 : 3500 264F D409 5601 0000 0100 0000 0000 5.&O..V.........
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0030 : 0003 706F 7704 7A69 6E67 036F 7267 0000 ..pow.zing.org..
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0040 : 0100 01 ...
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[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
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OFFSET 0001-0203-0405-0607-0809-0A0B-0C0D-0E0F 0123456789ABCDEF LEN=222
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0000 : FF03 003D C000 0013 2145 0000 D590 9340 ...=....!E.....@
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0010 : 00F7 116F 8E97 A401 08CF C11A 8800 3504 ...o..........5.
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0020 : 0400 C13E 0609 5681 8000 0100 0100 0300 ...>..V.........
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0030 : 0303 706F 7704 7A69 6E67 036F 7267 0000 ..pow.zing.org..
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0040 : 0100 01C0 0C00 0100 0100 000A 5C00 04CE ............\...
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0050 : 3924 5A04 5A49 4E47 036F 7267 0000 0200 9$Z.ZING.org....
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0060 : 0100 016F 5B00 0D03 4841 4E03 5449 5703 ...o[...HAN.TIW.
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0070 : 4E45 5400 C02E 0002 0001 0001 6F5B 0006 NET.........o[..
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0080 : 034E 5331 C02E C02E 0002 0001 0001 6F5B .NS1..........o[
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0090 : 001C 0854 414C 4945 5349 4E0D 434F 4E46 ...TALIESIN.CONF
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00A0 : 4142 554C 4154 494F 4E03 434F 4D00 C042 ABULATION.COM..B
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00B0 : 0001 0001 0001 51EC 0004 CE39 2406 C05B ......Q....9$..[
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00C0 : 0001 0001 0001 6F5B 0004 CE39 245A C06D ......o[...9$Z.m
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00D0 : 0001 0001 0001 4521 0004 187C 1F01 ......E!...|..
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*/
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/* Magic text to check for toshiba-ness of file */
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static const char toshiba_hdr_magic[] =
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{ 'T', ' ', 'O', ' ', 'S', ' ', 'H', ' ', 'I', ' ', 'B', ' ', 'A' };
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#define TOSHIBA_HDR_MAGIC_SIZE (sizeof toshiba_hdr_magic / sizeof toshiba_hdr_magic[0])
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/* Magic text for start of packet */
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static const char toshiba_rec_magic[] = { '[', 'N', 'o', '.' };
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#define TOSHIBA_REC_MAGIC_SIZE (sizeof toshiba_rec_magic / sizeof toshiba_rec_magic[0])
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/*
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* XXX - is this the biggest packet we can get?
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*/
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#define TOSHIBA_MAX_PACKET_LEN 16384
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static gboolean toshiba_read(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset);
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static gboolean toshiba_seek_read(wtap *wth, gint64 seek_off,
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union wtap_pseudo_header *pseudo_header, guint8 *pd, int len,
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int *err, gchar **err_info);
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static gboolean parse_single_hex_dump_line(char* rec, guint8 *buf,
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guint byte_offset);
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static gboolean parse_toshiba_hex_dump(FILE_T fh, int pkt_len, guint8* buf,
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int *err, gchar **err_info);
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static int parse_toshiba_rec_hdr(wtap *wth, FILE_T fh,
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union wtap_pseudo_header *pseudo_header, int *err, gchar **err_info);
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/* Seeks to the beginning of the next packet, and returns the
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byte offset. Returns -1 on failure, and sets "*err" to the error
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and "*err_info" to null or an additional error string. */
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static gint64 toshiba_seek_next_packet(wtap *wth, int *err, gchar **err_info)
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{
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int byte;
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guint level = 0;
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gint64 cur_off;
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while ((byte = file_getc(wth->fh)) != EOF) {
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if (byte == toshiba_rec_magic[level]) {
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level++;
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if (level >= TOSHIBA_REC_MAGIC_SIZE) {
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/* note: we're leaving file pointer right after the magic characters */
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cur_off = file_tell(wth->fh);
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if (cur_off == -1) {
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/* Error. */
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*err = file_error(wth->fh, err_info);
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return -1;
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}
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return cur_off + 1;
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}
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} else {
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level = 0;
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}
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}
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if (file_eof(wth->fh)) {
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/* We got an EOF. */
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*err = 0;
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} else {
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/* We got an error. */
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*err = file_error(wth->fh, err_info);
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}
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return -1;
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}
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#define TOSHIBA_HEADER_LINES_TO_CHECK 200
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#define TOSHIBA_LINE_LENGTH 240
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/* Look through the first part of a file to see if this is
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* a Toshiba trace file.
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*
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* Returns TRUE if it is, FALSE if it isn't or if we get an I/O error;
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* if we get an I/O error, "*err" will be set to a non-zero value and
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* "*err_info" will be set to null or an additional error string.
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*/
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static gboolean toshiba_check_file_type(wtap *wth, int *err, gchar **err_info)
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{
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char buf[TOSHIBA_LINE_LENGTH];
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guint i, reclen, level, line;
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char byte;
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buf[TOSHIBA_LINE_LENGTH-1] = 0;
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for (line = 0; line < TOSHIBA_HEADER_LINES_TO_CHECK; line++) {
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if (file_gets(buf, TOSHIBA_LINE_LENGTH, wth->fh) != NULL) {
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reclen = (guint) strlen(buf);
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if (reclen < TOSHIBA_HDR_MAGIC_SIZE) {
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continue;
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}
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level = 0;
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for (i = 0; i < reclen; i++) {
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byte = buf[i];
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if (byte == toshiba_hdr_magic[level]) {
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level++;
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if (level >= TOSHIBA_HDR_MAGIC_SIZE) {
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return TRUE;
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}
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}
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else {
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level = 0;
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}
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}
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}
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else {
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/* EOF or error. */
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if (file_eof(wth->fh))
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*err = 0;
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else
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*err = file_error(wth->fh, err_info);
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return FALSE;
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}
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}
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*err = 0;
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return FALSE;
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}
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int toshiba_open(wtap *wth, int *err, gchar **err_info)
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{
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/* Look for Toshiba header */
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if (!toshiba_check_file_type(wth, err, err_info)) {
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if (*err == 0)
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return 0;
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else
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return -1;
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}
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wth->data_offset = 0;
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wth->file_encap = WTAP_ENCAP_PER_PACKET;
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wth->file_type = WTAP_FILE_TOSHIBA;
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wth->snapshot_length = 0; /* not known */
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wth->subtype_read = toshiba_read;
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wth->subtype_seek_read = toshiba_seek_read;
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wth->tsprecision = WTAP_FILE_TSPREC_CSEC;
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return 1;
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}
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/* Find the next packet and parse it; called from wtap_read(). */
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static gboolean toshiba_read(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset)
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{
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gint64 offset;
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guint8 *buf;
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int pkt_len;
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/* Find the next packet */
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offset = toshiba_seek_next_packet(wth, err, err_info);
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if (offset < 1)
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return FALSE;
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/* Parse the header */
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pkt_len = parse_toshiba_rec_hdr(wth, wth->fh, &wth->pseudo_header,
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err, err_info);
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if (pkt_len == -1)
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return FALSE;
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/* Make sure we have enough room for the packet */
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buffer_assure_space(wth->frame_buffer, TOSHIBA_MAX_PACKET_LEN);
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buf = buffer_start_ptr(wth->frame_buffer);
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/* Convert the ASCII hex dump to binary data */
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if (!parse_toshiba_hex_dump(wth->fh, pkt_len, buf, err, err_info))
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return FALSE;
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wth->data_offset = offset;
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*data_offset = offset;
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return TRUE;
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}
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/* Used to read packets in random-access fashion */
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static gboolean
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toshiba_seek_read (wtap *wth, gint64 seek_off,
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union wtap_pseudo_header *pseudo_header, guint8 *pd, int len,
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int *err, gchar **err_info)
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{
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int pkt_len;
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if (file_seek(wth->random_fh, seek_off - 1, SEEK_SET, err) == -1)
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return FALSE;
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pkt_len = parse_toshiba_rec_hdr(NULL, wth->random_fh, pseudo_header,
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err, err_info);
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if (pkt_len != len) {
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if (pkt_len != -1) {
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*err = WTAP_ERR_BAD_RECORD;
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*err_info = g_strdup_printf("toshiba: requested length %d doesn't match record length %d",
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len, pkt_len);
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}
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return FALSE;
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}
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return parse_toshiba_hex_dump(wth->random_fh, pkt_len, pd, err, err_info);
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}
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/* Parses a packet record header. */
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static int
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parse_toshiba_rec_hdr(wtap *wth, FILE_T fh,
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union wtap_pseudo_header *pseudo_header, int *err, gchar **err_info)
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{
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char line[TOSHIBA_LINE_LENGTH];
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int num_items_scanned;
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int pkt_len, pktnum, hr, min, sec, csec;
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char channel[10], direction[10];
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/* Our file pointer should be on the line containing the
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* summary information for a packet. Read in that line and
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* extract the useful information
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*/
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if (file_gets(line, TOSHIBA_LINE_LENGTH, fh) == NULL) {
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*err = file_error(fh, err_info);
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if (*err == 0) {
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*err = WTAP_ERR_SHORT_READ;
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}
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return -1;
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}
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/* Find text in line after "[No.". Limit the length of the
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* two strings since we have fixed buffers for channel[] and
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* direction[] */
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num_items_scanned = sscanf(line, "%9d] %2d:%2d:%2d.%9d %9s %9s",
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&pktnum, &hr, &min, &sec, &csec, channel, direction);
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if (num_items_scanned != 7) {
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*err = WTAP_ERR_BAD_RECORD;
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*err_info = g_strdup("toshiba: record header isn't valid");
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return -1;
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}
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/* Scan lines until we find the OFFSET line. In a "telnet" trace,
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* this will be the next line. But if you save your telnet session
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* to a file from within a Windows-based telnet client, it may
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* put in line breaks at 80 columns (or however big your "telnet" box
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* is). CRT (a Windows telnet app from VanDyke) does this.
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* Here we assume that 80 columns will be the minimum size, and that
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* the OFFSET line is not broken in the middle. It's the previous
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* line that is normally long and can thus be broken at column 80.
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*/
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do {
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if (file_gets(line, TOSHIBA_LINE_LENGTH, fh) == NULL) {
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*err = file_error(fh, err_info);
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if (*err == 0) {
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*err = WTAP_ERR_SHORT_READ;
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}
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return -1;
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}
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/* Check for "OFFSET 0001-0203" at beginning of line */
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line[16] = '\0';
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} while (strcmp(line, "OFFSET 0001-0203") != 0);
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num_items_scanned = sscanf(line+64, "LEN=%9d", &pkt_len);
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if (num_items_scanned != 1) {
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*err = WTAP_ERR_BAD_RECORD;
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*err_info = g_strdup("toshiba: OFFSET line doesn't have valid LEN item");
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return -1;
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}
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if (wth) {
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wth->phdr.ts.secs = hr * 3600 + min * 60 + sec;
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wth->phdr.ts.nsecs = csec * 10000000;
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wth->phdr.caplen = pkt_len;
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wth->phdr.len = pkt_len;
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}
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switch (channel[0]) {
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case 'B':
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if (wth)
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wth->phdr.pkt_encap = WTAP_ENCAP_ISDN;
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pseudo_header->isdn.uton = (direction[0] == 'T');
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pseudo_header->isdn.channel = (guint8)
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strtol(&channel[1], NULL, 10);
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break;
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case 'D':
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if (wth)
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wth->phdr.pkt_encap = WTAP_ENCAP_ISDN;
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pseudo_header->isdn.uton = (direction[0] == 'T');
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pseudo_header->isdn.channel = 0;
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break;
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default:
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if (wth)
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wth->phdr.pkt_encap = WTAP_ENCAP_ETHERNET;
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/* XXX - is there an FCS in the frame? */
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pseudo_header->eth.fcs_len = -1;
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break;
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}
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return pkt_len;
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}
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/* Converts ASCII hex dump to binary data */
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static gboolean
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parse_toshiba_hex_dump(FILE_T fh, int pkt_len, guint8* buf, int *err,
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gchar **err_info)
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{
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char line[TOSHIBA_LINE_LENGTH];
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int i, hex_lines;
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/* Calculate the number of hex dump lines, each
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* containing 16 bytes of data */
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hex_lines = pkt_len / 16 + ((pkt_len % 16) ? 1 : 0);
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for (i = 0; i < hex_lines; i++) {
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if (file_gets(line, TOSHIBA_LINE_LENGTH, fh) == NULL) {
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*err = file_error(fh, err_info);
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if (*err == 0) {
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*err = WTAP_ERR_SHORT_READ;
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}
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return FALSE;
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}
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if (!parse_single_hex_dump_line(line, buf, i * 16)) {
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*err = WTAP_ERR_BAD_RECORD;
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*err_info = g_strdup("toshiba: hex dump not valid");
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return FALSE;
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}
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}
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return TRUE;
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}
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/*
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1 2 3 4
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0123456789012345678901234567890123456789012345
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0000 : FF03 003D C000 0008 2145 0000 3A12 6500 ...=....!E..:.e.
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0010 : 003F 11E6 58CF C11A 8897 A401 0804 0400 .?..X...........
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0020 : 0100 01 ...
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*/
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#define START_POS 7
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#define HEX_LENGTH ((8 * 4) + 7) /* eight clumps of 4 bytes with 7 inner spaces */
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/* Take a string representing one line from a hex dump and converts the
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* text to binary data. We check the printed offset with the offset
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* we are passed to validate the record. We place the bytes in the buffer
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* at the specified offset.
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*
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* In the process, we're going to write all over the string.
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*
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* Returns TRUE if good hex dump, FALSE if bad.
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*/
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static gboolean
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parse_single_hex_dump_line(char* rec, guint8 *buf, guint byte_offset) {
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int pos, i;
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char *s;
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unsigned long value;
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guint16 word_value;
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|
||
/* 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;
|
||
}
|