summaryrefslogtreecommitdiffstats
path: root/wiretap/toshiba.c
diff options
context:
space:
mode:
Diffstat (limited to 'wiretap/toshiba.c')
-rw-r--r--wiretap/toshiba.c469
1 files changed, 469 insertions, 0 deletions
diff --git a/wiretap/toshiba.c b/wiretap/toshiba.c
new file mode 100644
index 00000000..7c08d329
--- /dev/null
+++ b/wiretap/toshiba.c
@@ -0,0 +1,469 @@
+/* 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_10_MSEC;
+
+ 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 = ws_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:
+ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 12:47:27 +0000