158 lines
4 KiB
C
158 lines
4 KiB
C
/* hcidump.c
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*
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* $Id: hcidump.c,v 1.2 2003/10/30 11:53:48 guy Exp $
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*
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* Copyright (c) 2003 by Marcel Holtmann <marcel@holtmann.org>
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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 "file_wrappers.h"
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#include "buffer.h"
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#include "hcidump.h"
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struct dump_hdr {
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guint16 len;
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guint8 in;
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guint8 pad;
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guint32 ts_sec;
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guint32 ts_usec;
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};
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#define DUMP_HDR_SIZE (sizeof(struct dump_hdr))
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static gboolean hcidump_read(wtap *wth, int *err, long *data_offset)
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{
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struct dump_hdr dh;
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guint8 *buf;
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int bytes_read, packet_size;
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*data_offset = wth->data_offset;
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bytes_read = file_read(&dh, 1, DUMP_HDR_SIZE, wth->fh);
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if (bytes_read != DUMP_HDR_SIZE) {
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*err = file_error(wth->fh);
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if (*err == 0 && bytes_read != 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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wth->data_offset += DUMP_HDR_SIZE;
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packet_size = GUINT16_FROM_LE(dh.len);
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if (packet_size > WTAP_MAX_PACKET_SIZE) {
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/*
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* Probably a corrupt capture file; don't blow up trying
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* to allocate space for an immensely-large packet.
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*/
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g_message("hcidump: File has %u-byte packet, bigger than maximum of %u",
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packet_size, WTAP_MAX_PACKET_SIZE);
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*err = WTAP_ERR_BAD_RECORD;
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return FALSE;
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}
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buffer_assure_space(wth->frame_buffer, packet_size);
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buf = buffer_start_ptr(wth->frame_buffer);
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bytes_read = file_read(buf, 1, packet_size, wth->fh);
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if (bytes_read != packet_size) {
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*err = file_error(wth->fh);
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if (*err == 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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wth->data_offset += packet_size;
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wth->phdr.ts.tv_sec = GUINT32_FROM_LE(dh.ts_sec);
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wth->phdr.ts.tv_usec = GUINT32_FROM_LE(dh.ts_usec);
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wth->phdr.caplen = packet_size;
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wth->phdr.len = packet_size;
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wth->phdr.pkt_encap = WTAP_ENCAP_BLUETOOTH_H4;
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wth->pseudo_header.p2p.sent = (dh.in ? FALSE : TRUE);
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return TRUE;
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}
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static gboolean hcidump_seek_read(wtap *wth, long seek_off, union wtap_pseudo_header *pseudo_header, guint8 *pd, int length, int *err)
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{
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struct dump_hdr dh;
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int bytes_read;
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if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
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return FALSE;
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bytes_read = file_read(&dh, 1, DUMP_HDR_SIZE, wth->random_fh);
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if (bytes_read != DUMP_HDR_SIZE) {
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*err = file_error(wth->random_fh);
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if (*err == 0 && bytes_read != 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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bytes_read = file_read(pd, 1, length, wth->random_fh);
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if (bytes_read != length) {
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*err = file_error(wth->random_fh);
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if (*err == 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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pseudo_header->p2p.sent = (dh.in ? FALSE : TRUE);
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return TRUE;
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}
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int hcidump_open(wtap *wth, int *err)
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{
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struct dump_hdr dh;
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guint8 type;
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int bytes_read;
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bytes_read = file_read(&dh, 1, DUMP_HDR_SIZE, wth->fh);
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if (bytes_read != DUMP_HDR_SIZE) {
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*err = file_error(wth->fh);
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return (*err != 0) ? -1 : 0;
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}
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if (dh.in != 0 && dh.in != 1 && dh.pad != 0 && GUINT16_FROM_LE(dh.len) < 1)
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return 0;
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bytes_read = file_read(&type, 1, 1, wth->fh);
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if (bytes_read != 1) {
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*err = file_error(wth->fh);
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return (*err != 0) ? -1 : 0;
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}
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if (type < 1 || type > 4)
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return 0;
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
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return -1;
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wth->file_type = WTAP_FILE_HCIDUMP;
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wth->file_encap = WTAP_ENCAP_BLUETOOTH_H4;
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wth->snapshot_length = 0;
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wth->subtype_read = hcidump_read;
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wth->subtype_seek_read = hcidump_seek_read;
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return 1;
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}
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