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/* tnef.c
*
* Transport-Neutral Encapsulation Format (TNEF) file reading
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include "tnef.h"
#include "wtap-int.h"
#include "file_wrappers.h"
#include <wsutil/buffer.h>
static int tnef_file_type_subtype = -1;
void register_tnef(void);
wtap_open_return_val tnef_open(wtap *wth, int *err, char **err_info)
{
uint32_t magic;
if (!wtap_read_bytes(wth->fh, &magic, sizeof magic, err, err_info))
return (*err != WTAP_ERR_SHORT_READ) ? WTAP_OPEN_ERROR : WTAP_OPEN_NOT_MINE;
if (GUINT32_TO_LE(magic) != TNEF_SIGNATURE)
/* Not a tnef file */
return WTAP_OPEN_NOT_MINE;
/* seek back to the start of the file */
if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
return WTAP_OPEN_ERROR;
wth->file_type_subtype = tnef_file_type_subtype;
wth->file_encap = WTAP_ENCAP_TNEF;
wth->snapshot_length = 0;
wth->subtype_read = wtap_full_file_read;
wth->subtype_seek_read = wtap_full_file_seek_read;
wth->file_tsprec = WTAP_TSPREC_SEC;
return WTAP_OPEN_MINE;
}
static const struct supported_block_type tnef_blocks_supported[] = {
/*
* This is a file format that we dissect, so we provide only one
* "packet" with the file's contents, and don't support any
* options.
*/
{ WTAP_BLOCK_PACKET, ONE_BLOCK_SUPPORTED, NO_OPTIONS_SUPPORTED }
};
static const struct file_type_subtype_info tnef_info = {
"Transport-Neutral Encapsulation Format", "tnef", NULL, NULL,
false, BLOCKS_SUPPORTED(tnef_blocks_supported),
NULL, NULL, NULL
};
void register_tnef(void)
{
tnef_file_type_subtype = wtap_register_file_type_subtype(&tnef_info);
/*
* Register name for backwards compatibility with the
* wtap_filetypes table in Lua.
*/
wtap_register_backwards_compatibility_lua_name("TNEF",
tnef_file_type_subtype);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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