289 lines
8.1 KiB
C
289 lines
8.1 KiB
C
/* netxray.c
|
|
*
|
|
* $Id: netxray.c,v 1.12 1999/08/24 03:19:33 guy Exp $
|
|
*
|
|
* Wiretap Library
|
|
* Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include "wtap.h"
|
|
#include "netxray.h"
|
|
#include "buffer.h"
|
|
|
|
/* Capture file header, *including* magic number, is padded to 128 bytes. */
|
|
#define CAPTUREFILE_HEADER_SIZE 128
|
|
|
|
/* Magic number in NetXRay files. */
|
|
static const char netxray_magic[] = { /* magic header */
|
|
'X', 'C', 'P', '\0'
|
|
};
|
|
|
|
/* NetXRay file header (minus magic number). */
|
|
struct netxray_hdr {
|
|
char version[8]; /* version number */
|
|
guint32 start_time; /* UNIX time when capture started */
|
|
guint32 xxx[2]; /* unknown */
|
|
guint32 start_offset; /* offset of first packet in capture */
|
|
guint32 end_offset; /* offset after last packet in capture */
|
|
guint32 xxy[3]; /* unknown */
|
|
guint16 network; /* datalink type */
|
|
guint8 xxz[6];
|
|
guint32 timelo; /* lower 32 bits of time stamp of capture start */
|
|
guint32 timehi; /* upper 32 bits of time stamp of capture start */
|
|
/*
|
|
* XXX - other stuff.
|
|
*/
|
|
};
|
|
|
|
/* Version number strings. */
|
|
static const char vers_1_0[] = {
|
|
'0', '0', '1', '.', '0', '0', '0', '\0'
|
|
};
|
|
|
|
static const char vers_1_1[] = {
|
|
'0', '0', '1', '.', '1', '0', '0', '\0'
|
|
};
|
|
|
|
static const char vers_2_001[] = {
|
|
'0', '0', '2', '.', '0', '0', '1', '\0'
|
|
};
|
|
|
|
/* NetXRay 1.x data record format - followed by frame data. */
|
|
struct netxrayrec_1_x_hdr {
|
|
guint32 timelo; /* lower 32 bits of time stamp */
|
|
guint32 timehi; /* upper 32 bits of time stamp */
|
|
guint16 orig_len; /* packet length */
|
|
guint16 incl_len; /* capture length */
|
|
guint32 xxx[4]; /* unknown */
|
|
};
|
|
|
|
/* NetXRay 2.x data record format - followed by frame data. */
|
|
struct netxrayrec_2_x_hdr {
|
|
guint32 timelo; /* lower 32 bits of time stamp */
|
|
guint32 timehi; /* upper 32 bits of time stamp */
|
|
guint16 orig_len; /* packet length */
|
|
guint16 incl_len; /* capture length */
|
|
guint32 xxx[7]; /* unknown */
|
|
};
|
|
|
|
static int netxray_read(wtap *wth, int *err);
|
|
|
|
int netxray_open(wtap *wth, int *err)
|
|
{
|
|
int bytes_read;
|
|
char magic[sizeof netxray_magic];
|
|
struct netxray_hdr hdr;
|
|
double timeunit;
|
|
int version_major;
|
|
int file_type;
|
|
double t;
|
|
static const int netxray_encap[] = {
|
|
WTAP_ENCAP_ETHERNET,
|
|
WTAP_ENCAP_TR,
|
|
WTAP_ENCAP_FDDI_BITSWAPPED,
|
|
WTAP_ENCAP_UNKNOWN, /* WAN */
|
|
WTAP_ENCAP_UNKNOWN, /* LocalTalk */
|
|
WTAP_ENCAP_UNKNOWN, /* "DIX" - should not occur */
|
|
WTAP_ENCAP_UNKNOWN, /* ARCNET raw */
|
|
WTAP_ENCAP_UNKNOWN, /* ARCNET 878.2 */
|
|
WTAP_ENCAP_UNKNOWN, /* ATM */
|
|
WTAP_ENCAP_UNKNOWN, /* Wireless WAN */
|
|
WTAP_ENCAP_UNKNOWN /* IrDA */
|
|
};
|
|
#define NUM_NETXRAY_ENCAPS (sizeof netxray_encap / sizeof netxray_encap[0])
|
|
|
|
/* Read in the string that should be at the start of a NetXRay
|
|
* file */
|
|
fseek(wth->fh, 0, SEEK_SET);
|
|
errno = WTAP_ERR_CANT_READ;
|
|
bytes_read = fread(magic, 1, sizeof magic, wth->fh);
|
|
if (bytes_read != sizeof magic) {
|
|
if (ferror(wth->fh)) {
|
|
*err = errno;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (memcmp(magic, netxray_magic, sizeof netxray_magic) != 0) {
|
|
return 0;
|
|
}
|
|
|
|
/* Read the rest of the header. */
|
|
errno = WTAP_ERR_CANT_READ;
|
|
bytes_read = fread(&hdr, 1, sizeof hdr, wth->fh);
|
|
if (bytes_read != sizeof hdr) {
|
|
if (ferror(wth->fh)) {
|
|
*err = errno;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* It appears that version 1.1 files (as produced by Windows
|
|
* Sniffer Pro 2.0.01) have the time stamp in microseconds,
|
|
* rather than the milliseconds version 1.0 files appear to have.
|
|
*
|
|
* It also appears that version 2.001 files (as produced by
|
|
* Windows(?) Sniffer Pro 2.50.05) have per-packet headers with
|
|
* some extra fields. */
|
|
if (memcmp(hdr.version, vers_1_0, sizeof vers_1_0) == 0) {
|
|
timeunit = 1000.0;
|
|
version_major = 1;
|
|
file_type = WTAP_FILE_NETXRAY_1_0;
|
|
} else if (memcmp(hdr.version, vers_1_1, sizeof vers_1_1) == 0) {
|
|
timeunit = 1000000.0;
|
|
version_major = 1;
|
|
file_type = WTAP_FILE_NETXRAY_1_1;
|
|
} else if (memcmp(hdr.version, vers_2_001, sizeof vers_2_001) == 0) {
|
|
timeunit = 1000000.0;
|
|
version_major = 2;
|
|
file_type = WTAP_FILE_NETXRAY_2_001;
|
|
} else {
|
|
g_message("netxray: version \"%.8s\" unsupported", hdr.version);
|
|
*err = WTAP_ERR_UNSUPPORTED;
|
|
return -1;
|
|
}
|
|
|
|
hdr.network = pletohs(&hdr.network);
|
|
if (hdr.network >= NUM_NETXRAY_ENCAPS
|
|
|| netxray_encap[hdr.network] == WTAP_ENCAP_UNKNOWN) {
|
|
g_message("netxray: network type %u unknown or unsupported",
|
|
hdr.network);
|
|
*err = WTAP_ERR_UNSUPPORTED;
|
|
return -1;
|
|
}
|
|
|
|
/* This is a netxray file */
|
|
wth->file_type = file_type;
|
|
wth->capture.netxray = g_malloc(sizeof(netxray_t));
|
|
wth->subtype_read = netxray_read;
|
|
wth->file_encap = netxray_encap[hdr.network];
|
|
wth->snapshot_length = 16384; /* XXX - not available in header */
|
|
wth->capture.netxray->start_time = pletohl(&hdr.start_time);
|
|
wth->capture.netxray->timeunit = timeunit;
|
|
t = (double)pletohl(&hdr.timelo)
|
|
+ (double)pletohl(&hdr.timehi)*4294967296.0;
|
|
t = t/timeunit;
|
|
wth->capture.netxray->start_timestamp = t;
|
|
wth->capture.netxray->version_major = version_major;
|
|
/*wth->frame_number = 0;*/
|
|
/*wth->file_byte_offset = 0x10b;*/
|
|
|
|
/* Remember the offset after the last packet in the capture (which
|
|
* isn't necessarily the last packet in the file), as it appears
|
|
* there's sometimes crud after it. */
|
|
wth->capture.netxray->wrapped = 0;
|
|
wth->capture.netxray->end_offset = pletohl(&hdr.end_offset);
|
|
|
|
/* Seek to the beginning of the data records. */
|
|
fseek(wth->fh, pletohl(&hdr.start_offset), SEEK_SET);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Read the next packet */
|
|
static int netxray_read(wtap *wth, int *err)
|
|
{
|
|
guint32 packet_size;
|
|
int bytes_read;
|
|
union {
|
|
struct netxrayrec_1_x_hdr hdr_1_x;
|
|
struct netxrayrec_2_x_hdr hdr_2_x;
|
|
} hdr;
|
|
int hdr_size = 0;
|
|
int data_offset;
|
|
double t;
|
|
|
|
reread:
|
|
/* Have we reached the end of the packet data? */
|
|
data_offset = ftell(wth->fh);
|
|
if (data_offset == wth->capture.netxray->end_offset) {
|
|
/* Yes. */
|
|
return 0;
|
|
}
|
|
/* Read record header. */
|
|
switch (wth->capture.netxray->version_major) {
|
|
|
|
case 1:
|
|
hdr_size = sizeof (struct netxrayrec_1_x_hdr);
|
|
break;
|
|
|
|
case 2:
|
|
hdr_size = sizeof (struct netxrayrec_2_x_hdr);
|
|
break;
|
|
}
|
|
errno = WTAP_ERR_CANT_READ;
|
|
bytes_read = fread(&hdr, 1, hdr_size, wth->fh);
|
|
if (bytes_read != hdr_size) {
|
|
if (ferror(wth->fh)) {
|
|
*err = errno;
|
|
return -1;
|
|
}
|
|
if (bytes_read != 0) {
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
return -1;
|
|
}
|
|
|
|
/* We're at EOF. Wrap? */
|
|
if (!wth->capture.netxray->wrapped) {
|
|
/* Yes. Remember that we did. */
|
|
wth->capture.netxray->wrapped = 1;
|
|
fseek(wth->fh, CAPTUREFILE_HEADER_SIZE, SEEK_SET);
|
|
goto reread;
|
|
}
|
|
|
|
/* We've already wrapped - don't wrap again. */
|
|
return 0;
|
|
}
|
|
data_offset += hdr_size;
|
|
|
|
packet_size = pletohs(&hdr.hdr_1_x.incl_len);
|
|
buffer_assure_space(wth->frame_buffer, packet_size);
|
|
errno = WTAP_ERR_CANT_READ;
|
|
bytes_read = fread(buffer_start_ptr(wth->frame_buffer), 1,
|
|
packet_size, wth->fh);
|
|
|
|
if (bytes_read != packet_size) {
|
|
if (ferror(wth->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
return -1;
|
|
}
|
|
|
|
t = (double)pletohl(&hdr.hdr_1_x.timelo)
|
|
+ (double)pletohl(&hdr.hdr_1_x.timehi)*4294967296.0;
|
|
t /= wth->capture.netxray->timeunit;
|
|
t -= wth->capture.netxray->start_timestamp;
|
|
wth->phdr.ts.tv_sec = wth->capture.netxray->start_time + (long)t;
|
|
wth->phdr.ts.tv_usec = (unsigned long)((t-(double)(unsigned long)(t))
|
|
*1.0e6);
|
|
wth->phdr.caplen = packet_size;
|
|
wth->phdr.len = pletohs(&hdr.hdr_1_x.orig_len);
|
|
wth->phdr.pkt_encap = wth->file_encap;
|
|
|
|
return data_offset;
|
|
}
|