2009-01-07 07:21:31 +00:00
|
|
|
/* dct3trace.c
|
|
|
|
* Routines for reading signalling traces generated by Gammu (www.gammu.org)
|
|
|
|
* from Nokia DCT3 phones in Netmonitor mode.
|
|
|
|
*
|
2009-06-24 20:27:58 +00:00
|
|
|
* gammu --nokiadebug nhm5_587.txt v18-19
|
2009-01-07 07:21:31 +00:00
|
|
|
*
|
|
|
|
* Duncan Salerno <duncan.salerno@googlemail.com>
|
|
|
|
*
|
|
|
|
* Wiretap Library
|
|
|
|
* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
|
|
|
|
*
|
2018-04-30 07:47:58 +00:00
|
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
*/
|
2009-01-07 07:21:31 +00:00
|
|
|
|
|
|
|
#include "config.h"
|
|
|
|
#include "wtap-int.h"
|
|
|
|
#include "dct3trace.h"
|
|
|
|
#include "file_wrappers.h"
|
|
|
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
2016-09-09 08:30:12 +00:00
|
|
|
#include <errno.h>
|
2009-01-07 07:21:31 +00:00
|
|
|
|
2016-09-07 12:07:51 +00:00
|
|
|
#include <wsutil/strtoi.h>
|
2009-01-07 07:21:31 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
Example downlink data:
|
|
|
|
|
|
|
|
<?xml version="1.0"?>
|
|
|
|
<dump>
|
|
|
|
<l1 direction="down" logicalchannel="96" physicalchannel="19" sequence="268116" error="0" timeshift="2992" bsic="22" data="31063F100DD0297A53E1020103C802398E0B2B2B2B2B2B" >
|
|
|
|
<l2 data="063F100DD0297A53E1020103" rest="C802398E0B2B2B2B2B2B" >
|
|
|
|
</l2>
|
|
|
|
</l1>
|
|
|
|
</dump>
|
|
|
|
|
|
|
|
Example uplink data (no raw L1):
|
|
|
|
|
|
|
|
<?xml version="1.0"?>
|
|
|
|
<dump>
|
|
|
|
<l1 direction="up" logicalchannel="112" >
|
|
|
|
<l2 type="U" subtype="Unknown" p="0" data="061500400000000000000000000000000000" >
|
|
|
|
</l2>
|
|
|
|
</l1>
|
|
|
|
</dump>
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/* Magic text to check */
|
|
|
|
static const char dct3trace_magic_line1[] = "<?xml version=\"1.0\"?>";
|
|
|
|
static const char dct3trace_magic_line2[] = "<dump>";
|
|
|
|
static const char dct3trace_magic_record_start[] = "<l1 ";
|
|
|
|
static const char dct3trace_magic_record_end[] = "</l1>";
|
|
|
|
static const char dct3trace_magic_l2_start[] = "<l2 ";
|
2013-10-21 23:57:42 +00:00
|
|
|
#if 0 /* Not used ?? */
|
2009-01-07 07:21:31 +00:00
|
|
|
static const char dct3trace_magic_l2_end[] = "</l2>";
|
2013-10-21 23:57:42 +00:00
|
|
|
#endif
|
2009-01-07 07:21:31 +00:00
|
|
|
static const char dct3trace_magic_end[] = "</dump>";
|
|
|
|
|
2009-06-24 20:27:58 +00:00
|
|
|
#define MAX_PACKET_LEN 23
|
2009-01-07 07:21:31 +00:00
|
|
|
|
2019-04-05 01:56:27 +00:00
|
|
|
static gboolean dct3trace_read(wtap *wth, wtap_rec *rec,
|
|
|
|
Buffer *buf, int *err, gchar **err_info, gint64 *data_offset);
|
2014-05-23 10:50:02 +00:00
|
|
|
static gboolean dct3trace_seek_read(wtap *wth, gint64 seek_off,
|
2018-02-09 00:19:12 +00:00
|
|
|
wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
|
2009-01-07 07:21:31 +00:00
|
|
|
|
|
|
|
/*
|
2019-07-28 04:20:27 +00:00
|
|
|
* Following 3 functions taken from gsmdecode-0.7bis, with permission:
|
|
|
|
*
|
|
|
|
* https://web.archive.org/web/20091218112927/http://wiki.thc.org/gsm
|
2009-01-07 07:21:31 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
static int
|
|
|
|
hc2b(unsigned char hex)
|
|
|
|
{
|
2014-10-17 20:37:11 +00:00
|
|
|
hex = g_ascii_tolower(hex);
|
2009-01-07 07:21:31 +00:00
|
|
|
if ((hex >= '0') && (hex <= '9'))
|
|
|
|
return hex - '0';
|
|
|
|
if ((hex >= 'a') && (hex <= 'f'))
|
|
|
|
return hex - 'a' + 10;
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2013-06-21 02:59:54 +00:00
|
|
|
hex2bin(guint8 *out, guint8 *out_end, char *in)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2013-06-17 21:18:47 +00:00
|
|
|
guint8 *out_start = out;
|
2009-01-07 07:21:31 +00:00
|
|
|
int is_low = 0;
|
|
|
|
int c;
|
|
|
|
|
2013-06-17 21:18:47 +00:00
|
|
|
while (*in != '\0')
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2013-06-21 02:59:54 +00:00
|
|
|
c = hc2b(*(unsigned char *)in);
|
2009-01-07 07:21:31 +00:00
|
|
|
if (c < 0)
|
|
|
|
{
|
|
|
|
in++;
|
|
|
|
continue;
|
|
|
|
}
|
2013-06-17 21:18:47 +00:00
|
|
|
if (out == out_end)
|
|
|
|
{
|
|
|
|
/* Too much data */
|
|
|
|
return -1;
|
|
|
|
}
|
2009-01-07 07:21:31 +00:00
|
|
|
if (is_low == 0)
|
|
|
|
{
|
2013-06-17 21:18:47 +00:00
|
|
|
*out = c << 4;
|
2009-01-07 07:21:31 +00:00
|
|
|
is_low = 1;
|
|
|
|
} else {
|
2013-06-17 21:18:47 +00:00
|
|
|
*out |= (c & 0x0f);
|
2009-01-07 07:21:31 +00:00
|
|
|
is_low = 0;
|
|
|
|
out++;
|
|
|
|
}
|
|
|
|
in++;
|
|
|
|
}
|
|
|
|
|
2009-03-07 05:13:44 +00:00
|
|
|
return (int)(out - out_start);
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
2016-09-09 08:30:12 +00:00
|
|
|
static gboolean
|
|
|
|
xml_get_int(int *val, const char *str, const char *pattern, int *err, gchar **err_info)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2016-09-09 08:30:12 +00:00
|
|
|
const char *ptr, *endptr;
|
2009-01-07 07:21:31 +00:00
|
|
|
char *start, *end;
|
|
|
|
char buf[32];
|
|
|
|
|
2013-06-21 02:59:54 +00:00
|
|
|
ptr = strstr(str, pattern);
|
2016-09-09 08:30:12 +00:00
|
|
|
if (ptr == NULL) {
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
|
|
*err_info = g_strdup_printf("dct3trace: %s not found", pattern);
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* XXX - should we just skip past the pattern and check for ="?
|
|
|
|
*/
|
2009-01-07 07:21:31 +00:00
|
|
|
start = strchr(ptr, '"');
|
2016-09-09 08:30:12 +00:00
|
|
|
if (start == NULL) {
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
|
|
*err_info = g_strdup_printf("dct3trace: opening quote for %s not found", pattern);
|
|
|
|
return FALSE;
|
|
|
|
}
|
2009-01-07 07:21:31 +00:00
|
|
|
start++;
|
2016-09-09 08:30:12 +00:00
|
|
|
/*
|
|
|
|
* XXX - should we just use ws_strtoi32() and check whether
|
|
|
|
* the character following the number is a "?
|
|
|
|
*/
|
2009-01-07 07:21:31 +00:00
|
|
|
end = strchr(start, '"');
|
2016-09-09 08:30:12 +00:00
|
|
|
if (end == NULL) {
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
|
|
*err_info = g_strdup_printf("dct3trace: closing quote for %s not found", pattern);
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
if (end - start > 31) {
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
|
|
*err_info = g_strdup_printf("dct3trace: %s value is too long", pattern);
|
|
|
|
return FALSE;
|
|
|
|
}
|
2009-01-07 07:21:31 +00:00
|
|
|
|
|
|
|
memcpy(buf, start, end - start);
|
|
|
|
buf[end - start] = '\0';
|
2016-09-09 08:30:12 +00:00
|
|
|
/*
|
|
|
|
* XXX - should we allow negative numbers in all cases? Or are
|
|
|
|
* there cases where the number is unsigned?
|
|
|
|
*/
|
|
|
|
if (!ws_strtoi32(buf, &endptr, val)) {
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
|
|
if (errno == ERANGE) {
|
2016-09-09 08:31:23 +00:00
|
|
|
if (*val < 0)
|
2016-09-09 08:30:12 +00:00
|
|
|
*err_info = g_strdup_printf("dct3trace: %s value is too small, minimum is %d", pattern, *val);
|
|
|
|
else
|
|
|
|
*err_info = g_strdup_printf("dct3trace: %s value is too large, maximum is %d", pattern, *val);
|
|
|
|
} else
|
|
|
|
*err_info = g_strdup_printf("dct3trace: %s value \"%s\" not a number", pattern, buf);
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
if (*endptr != '\0') {
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
|
|
*err_info = g_strdup_printf("dct3trace: %s value \"%s\" not a number", pattern, buf);
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
return TRUE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2014-10-09 23:44:15 +00:00
|
|
|
wtap_open_return_val dct3trace_open(wtap *wth, int *err, gchar **err_info)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
|
|
|
char line1[64], line2[64];
|
|
|
|
|
Do not call wtap_file_read_unknown_bytes() or
wtap_file_read_expected_bytes() from an open routine - open routines are
supposed to return -1 on error, 0 if the file doesn't appear to be a
file of the specified type, or 1 if the file does appear to be a file of
the specified type, but those macros will cause the caller to return
FALSE on errors (so that, even if there's an I/O error, it reports "the
file isn't a file of the specified type" rather than "we got an error
trying to read the file").
When doing reads in an open routine before we've concluded that the file
is probably of the right type, return 0, rather than -1, if we get
WTAP_ERR_SHORT_READ - if we don't have enough data to check whether a
file is of a given type, we should keep trying other types, not give up.
For reads done *after* we've concluded the file is probably of the right
type, if a read doesn't return the number of bytes we asked for, but
returns an error of 0, return WTAP_ERR_SHORT_READ - the file is
apparently cut short.
For NetMon and NetXRay/Windows Sniffer files, use a #define for the
magic number size, and use that for both magic numbers.
svn path=/trunk/; revision=46803
2012-12-27 12:19:25 +00:00
|
|
|
/* Look for Gammu DCT3 trace header */
|
2014-05-09 05:18:49 +00:00
|
|
|
if (file_gets(line1, sizeof(line1), wth->fh) == NULL ||
|
|
|
|
file_gets(line2, sizeof(line2), wth->fh) == NULL)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2014-05-09 05:18:49 +00:00
|
|
|
*err = file_error(wth->fh, err_info);
|
Do not call wtap_file_read_unknown_bytes() or
wtap_file_read_expected_bytes() from an open routine - open routines are
supposed to return -1 on error, 0 if the file doesn't appear to be a
file of the specified type, or 1 if the file does appear to be a file of
the specified type, but those macros will cause the caller to return
FALSE on errors (so that, even if there's an I/O error, it reports "the
file isn't a file of the specified type" rather than "we got an error
trying to read the file").
When doing reads in an open routine before we've concluded that the file
is probably of the right type, return 0, rather than -1, if we get
WTAP_ERR_SHORT_READ - if we don't have enough data to check whether a
file is of a given type, we should keep trying other types, not give up.
For reads done *after* we've concluded the file is probably of the right
type, if a read doesn't return the number of bytes we asked for, but
returns an error of 0, return WTAP_ERR_SHORT_READ - the file is
apparently cut short.
For NetMon and NetXRay/Windows Sniffer files, use a #define for the
magic number size, and use that for both magic numbers.
svn path=/trunk/; revision=46803
2012-12-27 12:19:25 +00:00
|
|
|
if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
|
2014-10-09 23:44:15 +00:00
|
|
|
return WTAP_OPEN_ERROR;
|
|
|
|
return WTAP_OPEN_NOT_MINE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
Do not call wtap_file_read_unknown_bytes() or
wtap_file_read_expected_bytes() from an open routine - open routines are
supposed to return -1 on error, 0 if the file doesn't appear to be a
file of the specified type, or 1 if the file does appear to be a file of
the specified type, but those macros will cause the caller to return
FALSE on errors (so that, even if there's an I/O error, it reports "the
file isn't a file of the specified type" rather than "we got an error
trying to read the file").
When doing reads in an open routine before we've concluded that the file
is probably of the right type, return 0, rather than -1, if we get
WTAP_ERR_SHORT_READ - if we don't have enough data to check whether a
file is of a given type, we should keep trying other types, not give up.
For reads done *after* we've concluded the file is probably of the right
type, if a read doesn't return the number of bytes we asked for, but
returns an error of 0, return WTAP_ERR_SHORT_READ - the file is
apparently cut short.
For NetMon and NetXRay/Windows Sniffer files, use a #define for the
magic number size, and use that for both magic numbers.
svn path=/trunk/; revision=46803
2012-12-27 12:19:25 +00:00
|
|
|
/* Don't compare line endings */
|
|
|
|
if( strncmp(dct3trace_magic_line1, line1, strlen(dct3trace_magic_line1)) != 0 ||
|
|
|
|
strncmp(dct3trace_magic_line2, line2, strlen(dct3trace_magic_line2)) != 0)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2014-10-09 23:44:15 +00:00
|
|
|
return WTAP_OPEN_NOT_MINE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
2014-05-09 05:18:49 +00:00
|
|
|
wth->file_encap = WTAP_ENCAP_GSM_UM;
|
|
|
|
wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_DCT3TRACE;
|
|
|
|
wth->snapshot_length = 0; /* not known */
|
|
|
|
wth->subtype_read = dct3trace_read;
|
|
|
|
wth->subtype_seek_read = dct3trace_seek_read;
|
2014-09-28 18:37:06 +00:00
|
|
|
wth->file_tsprec = WTAP_TSPREC_SEC;
|
2009-01-07 07:21:31 +00:00
|
|
|
|
2014-10-09 23:44:15 +00:00
|
|
|
return WTAP_OPEN_MINE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2018-02-09 00:19:12 +00:00
|
|
|
static gboolean dct3trace_get_packet(FILE_T fh, wtap_rec *rec,
|
2013-06-17 21:18:47 +00:00
|
|
|
Buffer *buf, int *err, gchar **err_info)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2013-06-21 02:59:54 +00:00
|
|
|
char line[1024];
|
2013-06-17 21:18:47 +00:00
|
|
|
guint8 databuf[MAX_PACKET_LEN], *bufp;
|
2009-01-07 07:21:31 +00:00
|
|
|
gboolean have_data = FALSE;
|
2013-05-17 13:37:36 +00:00
|
|
|
int len = 0;
|
2009-01-07 07:21:31 +00:00
|
|
|
|
2013-06-17 21:18:47 +00:00
|
|
|
bufp = &databuf[0];
|
2009-01-07 07:21:31 +00:00
|
|
|
while (file_gets(line, sizeof(line), fh) != NULL)
|
|
|
|
{
|
|
|
|
if( memcmp(dct3trace_magic_end, line, strlen(dct3trace_magic_end)) == 0 )
|
|
|
|
{
|
|
|
|
/* Return on end of file </dump> */
|
|
|
|
*err = 0;
|
2014-05-23 10:50:02 +00:00
|
|
|
return FALSE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
else if( memcmp(dct3trace_magic_record_end, line, strlen(dct3trace_magic_record_end)) == 0 )
|
|
|
|
{
|
|
|
|
/* Return on end of record </l1> */
|
|
|
|
if( have_data )
|
|
|
|
{
|
2013-05-17 00:21:16 +00:00
|
|
|
/* We've got a full packet! */
|
2018-02-09 00:19:12 +00:00
|
|
|
rec->rec_type = REC_TYPE_PACKET;
|
|
|
|
rec->presence_flags = 0; /* no time stamp, no separate "on the wire" length */
|
|
|
|
rec->ts.secs = 0;
|
|
|
|
rec->ts.nsecs = 0;
|
|
|
|
rec->rec_header.packet_header.caplen = len;
|
|
|
|
rec->rec_header.packet_header.len = len;
|
2013-05-17 00:21:16 +00:00
|
|
|
|
2009-01-07 07:21:31 +00:00
|
|
|
*err = 0;
|
2013-06-17 21:18:47 +00:00
|
|
|
|
|
|
|
/* Make sure we have enough room for the packet */
|
2018-02-09 00:19:12 +00:00
|
|
|
ws_buffer_assure_space(buf, rec->rec_header.packet_header.caplen);
|
|
|
|
memcpy( ws_buffer_start_ptr(buf), databuf, rec->rec_header.packet_header.caplen );
|
2013-06-17 21:18:47 +00:00
|
|
|
|
2014-05-23 10:50:02 +00:00
|
|
|
return TRUE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* If not got any data return error */
|
2011-12-13 09:53:50 +00:00
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
2016-06-06 02:24:47 +00:00
|
|
|
*err_info = g_strdup("dct3trace: record without data");
|
2014-05-23 10:50:02 +00:00
|
|
|
return FALSE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
else if( memcmp(dct3trace_magic_record_start, line, strlen(dct3trace_magic_record_start)) == 0 )
|
|
|
|
{
|
|
|
|
/* Parse L1 header <l1 ...>*/
|
2012-04-28 03:07:04 +00:00
|
|
|
int channel, tmp;
|
2009-01-07 07:21:31 +00:00
|
|
|
char *ptr;
|
|
|
|
|
2018-02-09 00:19:12 +00:00
|
|
|
rec->rec_header.packet_header.pseudo_header.gsm_um.uplink = !strstr(line, "direction=\"down\"");
|
2016-09-09 08:30:12 +00:00
|
|
|
if (!xml_get_int(&channel, line, "logicalchannel", err, err_info))
|
|
|
|
return FALSE;
|
2009-01-07 07:21:31 +00:00
|
|
|
|
|
|
|
/* Parse downlink only fields */
|
2018-02-09 00:19:12 +00:00
|
|
|
if( !rec->rec_header.packet_header.pseudo_header.gsm_um.uplink )
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2016-09-09 08:30:12 +00:00
|
|
|
if (!xml_get_int(&tmp, line, "physicalchannel", err, err_info))
|
|
|
|
return FALSE;
|
2018-02-09 00:19:12 +00:00
|
|
|
rec->rec_header.packet_header.pseudo_header.gsm_um.arfcn = tmp;
|
2016-09-09 08:30:12 +00:00
|
|
|
if (!xml_get_int(&tmp, line, "sequence", err, err_info))
|
|
|
|
return FALSE;
|
2018-02-09 00:19:12 +00:00
|
|
|
rec->rec_header.packet_header.pseudo_header.gsm_um.tdma_frame = tmp;
|
2016-09-09 08:30:12 +00:00
|
|
|
if (!xml_get_int(&tmp, line, "bsic", err, err_info))
|
|
|
|
return FALSE;
|
2018-02-09 00:19:12 +00:00
|
|
|
rec->rec_header.packet_header.pseudo_header.gsm_um.bsic = tmp;
|
2016-09-09 08:30:12 +00:00
|
|
|
if (!xml_get_int(&tmp, line, "error", err, err_info))
|
|
|
|
return FALSE;
|
2018-02-09 00:19:12 +00:00
|
|
|
rec->rec_header.packet_header.pseudo_header.gsm_um.error = tmp;
|
2016-09-09 08:30:12 +00:00
|
|
|
if (!xml_get_int(&tmp, line, "timeshift", err, err_info))
|
|
|
|
return FALSE;
|
2018-02-09 00:19:12 +00:00
|
|
|
rec->rec_header.packet_header.pseudo_header.gsm_um.timeshift = tmp;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
switch( channel )
|
|
|
|
{
|
2018-02-09 00:19:12 +00:00
|
|
|
case 128: rec->rec_header.packet_header.pseudo_header.gsm_um.channel = GSM_UM_CHANNEL_SDCCH; break;
|
|
|
|
case 112: rec->rec_header.packet_header.pseudo_header.gsm_um.channel = GSM_UM_CHANNEL_SACCH; break;
|
|
|
|
case 176: rec->rec_header.packet_header.pseudo_header.gsm_um.channel = GSM_UM_CHANNEL_FACCH; break;
|
|
|
|
case 96: rec->rec_header.packet_header.pseudo_header.gsm_um.channel = GSM_UM_CHANNEL_CCCH; break;
|
|
|
|
case 80: rec->rec_header.packet_header.pseudo_header.gsm_um.channel = GSM_UM_CHANNEL_BCCH; break;
|
|
|
|
default: rec->rec_header.packet_header.pseudo_header.gsm_um.channel = GSM_UM_CHANNEL_UNKNOWN; break;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
2013-06-17 21:18:47 +00:00
|
|
|
/* Read data (if have it) into databuf */
|
2009-01-07 07:21:31 +00:00
|
|
|
ptr = strstr(line, "data=\"");
|
|
|
|
if( ptr )
|
|
|
|
{
|
|
|
|
have_data = TRUE; /* If has data... */
|
2013-06-17 21:18:47 +00:00
|
|
|
len = hex2bin(bufp, &databuf[MAX_PACKET_LEN], ptr+6);
|
|
|
|
if (len == -1)
|
|
|
|
{
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
2018-02-09 00:19:12 +00:00
|
|
|
*err_info = g_strdup_printf("dct3trace: record length %d too long", rec->rec_header.packet_header.caplen);
|
2014-05-23 10:50:02 +00:00
|
|
|
return FALSE;
|
2013-06-17 21:18:47 +00:00
|
|
|
}
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
else if( !have_data && memcmp(dct3trace_magic_l2_start, line, strlen(dct3trace_magic_l2_start)) == 0 )
|
|
|
|
{
|
2009-06-24 20:27:58 +00:00
|
|
|
/* For uplink packets we might not get the raw L1, so have to recreate it from the L2 */
|
2009-01-07 07:21:31 +00:00
|
|
|
/* Parse L2 header if didn't get data from L1 <l2 ...> */
|
2013-06-17 21:18:47 +00:00
|
|
|
int data_len;
|
2009-01-07 07:21:31 +00:00
|
|
|
char *ptr = strstr(line, "data=\"");
|
|
|
|
|
|
|
|
if( !ptr )
|
|
|
|
{
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
have_data = TRUE;
|
|
|
|
|
2013-06-17 21:18:47 +00:00
|
|
|
/*
|
|
|
|
* We know we have no data already, so we know
|
|
|
|
* we have enough room for the header.
|
|
|
|
*/
|
2018-02-09 00:19:12 +00:00
|
|
|
if( rec->rec_header.packet_header.pseudo_header.gsm_um.channel == GSM_UM_CHANNEL_SACCH || rec->rec_header.packet_header.pseudo_header.gsm_um.channel == GSM_UM_CHANNEL_FACCH || rec->rec_header.packet_header.pseudo_header.gsm_um.channel == GSM_UM_CHANNEL_SDCCH )
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
|
|
|
/* Add LAPDm B header */
|
2013-06-17 21:18:47 +00:00
|
|
|
memset(bufp, 0x1, 2);
|
2013-05-17 00:21:16 +00:00
|
|
|
len = 3;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Add LAPDm Bbis header */
|
2013-05-17 00:21:16 +00:00
|
|
|
len = 1;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
2013-06-17 21:18:47 +00:00
|
|
|
bufp += len;
|
2009-01-07 07:21:31 +00:00
|
|
|
|
2013-06-17 21:18:47 +00:00
|
|
|
data_len = hex2bin(bufp, &databuf[MAX_PACKET_LEN], ptr+6);
|
|
|
|
if (data_len == -1)
|
|
|
|
{
|
|
|
|
*err = WTAP_ERR_BAD_FILE;
|
2018-02-09 00:19:12 +00:00
|
|
|
*err_info = g_strdup_printf("dct3trace: record length %d too long", rec->rec_header.packet_header.caplen);
|
2014-05-23 10:50:02 +00:00
|
|
|
return FALSE;
|
2013-06-17 21:18:47 +00:00
|
|
|
}
|
2013-05-17 00:21:16 +00:00
|
|
|
len += data_len;
|
2009-01-07 07:21:31 +00:00
|
|
|
|
|
|
|
/* Add LAPDm length byte */
|
2013-06-17 21:18:47 +00:00
|
|
|
*(bufp - 1) = data_len << 2 | 0x1;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-04-21 09:41:52 +00:00
|
|
|
*err = file_error(fh, err_info);
|
2009-01-07 07:21:31 +00:00
|
|
|
if (*err == 0)
|
|
|
|
{
|
|
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
|
|
}
|
2014-05-23 10:50:02 +00:00
|
|
|
return FALSE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Find the next packet and parse it; called from wtap_read(). */
|
2019-04-05 01:56:27 +00:00
|
|
|
static gboolean dct3trace_read(wtap *wth, wtap_rec *rec, Buffer *buf,
|
|
|
|
int *err, gchar **err_info, gint64 *data_offset)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2014-05-09 05:18:49 +00:00
|
|
|
*data_offset = file_tell(wth->fh);
|
2009-01-07 07:21:31 +00:00
|
|
|
|
2019-04-05 01:56:27 +00:00
|
|
|
return dct3trace_get_packet(wth->fh, rec, buf, err, err_info);
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Used to read packets in random-access fashion */
|
2014-05-23 10:50:02 +00:00
|
|
|
static gboolean dct3trace_seek_read(wtap *wth, gint64 seek_off,
|
2018-02-09 00:19:12 +00:00
|
|
|
wtap_rec *rec, Buffer *buf, int *err, gchar **err_info)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2014-05-09 05:18:49 +00:00
|
|
|
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
|
2009-01-07 07:21:31 +00:00
|
|
|
{
|
2014-05-23 10:50:02 +00:00
|
|
|
return FALSE;
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
|
|
|
|
2018-02-09 00:19:12 +00:00
|
|
|
return dct3trace_get_packet(wth->random_fh, rec, buf, err, err_info);
|
2009-01-07 07:21:31 +00:00
|
|
|
}
|
2015-01-02 00:45:22 +00:00
|
|
|
|
|
|
|
/*
|
2019-07-26 18:43:17 +00:00
|
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
2015-01-02 00:45:22 +00:00
|
|
|
*
|
|
|
|
* 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:
|
|
|
|
*/
|