forked from osmocom/wireshark
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/* hcidump.c
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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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_process_packet(FILE_T fh, struct wtap_pkthdr *phdr,
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Buffer *buf, int *err, gchar **err_info)
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{
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struct dump_hdr dh;
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int bytes_read, packet_size;
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bytes_read = file_read(&dh, DUMP_HDR_SIZE, fh);
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if (bytes_read != DUMP_HDR_SIZE) {
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*err = file_error(fh, err_info);
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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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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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*err = WTAP_ERR_BAD_FILE;
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*err_info = g_strdup_printf("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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return FALSE;
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}
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phdr->rec_type = REC_TYPE_PACKET;
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phdr->presence_flags = WTAP_HAS_TS;
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phdr->ts.secs = GUINT32_FROM_LE(dh.ts_sec);
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phdr->ts.nsecs = GUINT32_FROM_LE(dh.ts_usec) * 1000;
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phdr->caplen = packet_size;
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phdr->len = packet_size;
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phdr->pseudo_header.p2p.sent = (dh.in ? FALSE : TRUE);
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return wtap_read_packet_bytes(fh, buf, packet_size, err, err_info);
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}
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static gboolean hcidump_read(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset)
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{
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*data_offset = file_tell(wth->fh);
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return hcidump_process_packet(wth->fh, &wth->phdr, wth->frame_buffer,
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err, err_info);
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}
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static gboolean hcidump_seek_read(wtap *wth, gint64 seek_off,
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struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info)
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{
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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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return hcidump_process_packet(wth->random_fh, phdr, buf, err, err_info);
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}
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int hcidump_open(wtap *wth, int *err, gchar **err_info)
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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, DUMP_HDR_SIZE, wth->fh);
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if (bytes_read != DUMP_HDR_SIZE) {
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*err = file_error(wth->fh, err_info);
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if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
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return -1;
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return 0;
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}
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if ((dh.in != 0 && dh.in != 1) || dh.pad != 0
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|| GUINT16_FROM_LE(dh.len) < 1)
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return 0;
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bytes_read = file_read(&type, 1, wth->fh);
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if (bytes_read != 1) {
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*err = file_error(wth->fh, err_info);
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if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
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return -1;
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return 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_subtype = WTAP_FILE_TYPE_SUBTYPE_HCIDUMP;
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wth->file_encap = WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR;
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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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wth->tsprecision = WTAP_FILE_TSPREC_USEC;
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return 1;
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}
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