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/* hcidump.c
*
* Copyright (c) 2003 by Marcel Holtmann <marcel@holtmann.org>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include "hcidump.h"
#include "wtap-int.h"
#include "file_wrappers.h"
static int hcidump_file_type_subtype = -1;
void register_hcidump(void);
struct dump_hdr {
uint16_t len;
uint8_t in;
uint8_t pad;
uint32_t ts_sec;
uint32_t ts_usec;
};
#define DUMP_HDR_SIZE (sizeof(struct dump_hdr))
static bool hcidump_read_packet(wtap *wth, FILE_T fh, wtap_rec *rec,
int *err, char **err_info)
{
struct dump_hdr dh;
unsigned packet_size;
if (!wtap_read_bytes_or_eof(fh, &dh, DUMP_HDR_SIZE, err, err_info))
return false;
packet_size = GUINT16_FROM_LE(dh.len);
if (packet_size > WTAP_MAX_PACKET_SIZE_STANDARD) {
/*
* Probably a corrupt capture file; don't blow up trying
* to allocate space for an immensely-large packet.
*/
*err = WTAP_ERR_BAD_FILE;
*err_info = ws_strdup_printf("hcidump: File has %u-byte packet, bigger than maximum of %u",
packet_size, WTAP_MAX_PACKET_SIZE_STANDARD);
return false;
}
wtap_setup_packet_rec(rec, wth->file_encap);
rec->block = wtap_block_create(WTAP_BLOCK_PACKET);
rec->presence_flags = WTAP_HAS_TS;
rec->ts.secs = GUINT32_FROM_LE(dh.ts_sec);
rec->ts.nsecs = GUINT32_FROM_LE(dh.ts_usec) * 1000;
rec->rec_header.packet_header.caplen = packet_size;
rec->rec_header.packet_header.len = packet_size;
rec->rec_header.packet_header.pseudo_header.p2p.sent = (dh.in ? false : true);
return wtap_read_bytes_buffer(fh, &rec->data, packet_size, err, err_info);
}
static bool hcidump_read(wtap *wth, wtap_rec *rec,
int *err, char **err_info, int64_t *data_offset)
{
*data_offset = file_tell(wth->fh);
return hcidump_read_packet(wth, wth->fh, rec, err, err_info);
}
static bool hcidump_seek_read(wtap *wth, int64_t seek_off,
wtap_rec *rec, int *err, char **err_info)
{
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
return false;
return hcidump_read_packet(wth, wth->random_fh, rec, err, err_info);
}
wtap_open_return_val hcidump_open(wtap *wth, int *err, char **err_info)
{
struct dump_hdr dh;
uint8_t type;
if (!wtap_read_bytes(wth->fh, &dh, DUMP_HDR_SIZE, err, err_info)) {
if (*err != WTAP_ERR_SHORT_READ)
return WTAP_OPEN_ERROR;
return WTAP_OPEN_NOT_MINE;
}
if ((dh.in != 0 && dh.in != 1) || dh.pad != 0
|| GUINT16_FROM_LE(dh.len) < 1)
return WTAP_OPEN_NOT_MINE;
if (!wtap_read_bytes(wth->fh, &type, 1, err, err_info)) {
if (*err != WTAP_ERR_SHORT_READ)
return WTAP_OPEN_ERROR;
return WTAP_OPEN_NOT_MINE;
}
if (type < 1 || type > 4)
return WTAP_OPEN_NOT_MINE;
if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
return WTAP_OPEN_ERROR;
wth->file_type_subtype = hcidump_file_type_subtype;
wth->file_encap = WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR;
wth->snapshot_length = 0;
wth->subtype_read = hcidump_read;
wth->subtype_seek_read = hcidump_seek_read;
wth->file_tsprec = WTAP_TSPREC_USEC;
/*
* Add an IDB; we don't know how many interfaces were
* involved, so we just say one interface, about which
* we only know the link-layer type, snapshot length,
* and time stamp resolution.
*/
wtap_add_generated_idb(wth);
return WTAP_OPEN_MINE;
}
static const struct supported_block_type hcidummp_blocks_supported[] = {
/*
* We support packet blocks, with no comments or other options.
*/
{ WTAP_BLOCK_PACKET, MULTIPLE_BLOCKS_SUPPORTED, NO_OPTIONS_SUPPORTED }
};
static const struct file_type_subtype_info hcidump_info = {
"Bluetooth HCI dump", "hcidump", NULL, NULL,
false, BLOCKS_SUPPORTED(hcidummp_blocks_supported),
NULL, NULL, NULL
};
void register_hcidump(void)
{
hcidump_file_type_subtype = wtap_register_file_type_subtype(&hcidump_info);
/*
* Register name for backwards compatibility with the
* wtap_filetypes table in Lua.
*/
wtap_register_backwards_compatibility_lua_name("HCIDUMP",
hcidump_file_type_subtype);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* 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:
*/
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