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/* hcidump.c
*
* $Id$
*
* Copyright (c) 2003 by Marcel Holtmann <marcel@holtmann.org>
*
* 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 "wtap-int.h"
#include "file_wrappers.h"
#include "buffer.h"
#include "hcidump.h"
struct dump_hdr {
guint16 len;
guint8 in;
guint8 pad;
guint32 ts_sec;
guint32 ts_usec;
};
#define DUMP_HDR_SIZE (sizeof(struct dump_hdr))
static gboolean hcidump_read(wtap *wth, int *err, gchar **err_info,
long *data_offset)
{
struct dump_hdr dh;
guint8 *buf;
int bytes_read, packet_size;
*data_offset = wth->data_offset;
bytes_read = file_read(&dh, 1, DUMP_HDR_SIZE, wth->fh);
if (bytes_read != DUMP_HDR_SIZE) {
*err = file_error(wth->fh);
if (*err == 0 && bytes_read != 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
wth->data_offset += DUMP_HDR_SIZE;
packet_size = GUINT16_FROM_LE(dh.len);
if (packet_size > WTAP_MAX_PACKET_SIZE) {
/*
* Probably a corrupt capture file; don't blow up trying
* to allocate space for an immensely-large packet.
*/
*err = WTAP_ERR_BAD_RECORD;
*err_info = g_strdup_printf("hcidump: File has %u-byte packet, bigger than maximum of %u",
packet_size, WTAP_MAX_PACKET_SIZE);
return FALSE;
}
buffer_assure_space(wth->frame_buffer, packet_size);
buf = buffer_start_ptr(wth->frame_buffer);
bytes_read = file_read(buf, 1, packet_size, wth->fh);
if (bytes_read != packet_size) {
*err = file_error(wth->fh);
if (*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
wth->data_offset += packet_size;
wth->phdr.ts.tv_sec = GUINT32_FROM_LE(dh.ts_sec);
wth->phdr.ts.tv_usec = GUINT32_FROM_LE(dh.ts_usec);
wth->phdr.caplen = packet_size;
wth->phdr.len = packet_size;
wth->pseudo_header.p2p.sent = (dh.in ? FALSE : TRUE);
return TRUE;
}
static gboolean hcidump_seek_read(wtap *wth, long seek_off,
union wtap_pseudo_header *pseudo_header, guint8 *pd, int length,
int *err, gchar **err_info _U_)
{
struct dump_hdr dh;
int bytes_read;
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
return FALSE;
bytes_read = file_read(&dh, 1, DUMP_HDR_SIZE, wth->random_fh);
if (bytes_read != DUMP_HDR_SIZE) {
*err = file_error(wth->random_fh);
if (*err == 0 && bytes_read != 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
bytes_read = file_read(pd, 1, length, wth->random_fh);
if (bytes_read != length) {
*err = file_error(wth->random_fh);
if (*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
pseudo_header->p2p.sent = (dh.in ? FALSE : TRUE);
return TRUE;
}
int hcidump_open(wtap *wth, int *err, gchar **err_info _U_)
{
struct dump_hdr dh;
guint8 type;
int bytes_read;
bytes_read = file_read(&dh, 1, DUMP_HDR_SIZE, wth->fh);
if (bytes_read != DUMP_HDR_SIZE) {
*err = file_error(wth->fh);
return (*err != 0) ? -1 : 0;
}
if (dh.in != 0 && dh.in != 1 && dh.pad != 0 && GUINT16_FROM_LE(dh.len) < 1)
return 0;
bytes_read = file_read(&type, 1, 1, wth->fh);
if (bytes_read != 1) {
*err = file_error(wth->fh);
return (*err != 0) ? -1 : 0;
}
if (type < 1 || type > 4)
return 0;
if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
return -1;
wth->file_type = WTAP_FILE_HCIDUMP;
wth->file_encap = WTAP_ENCAP_BLUETOOTH_H4;
wth->snapshot_length = 0;
wth->subtype_read = hcidump_read;
wth->subtype_seek_read = hcidump_seek_read;
return 1;
}
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