forked from osmocom/wireshark
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/* tnef.c
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*
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* Transport-Neutral Encapsulation Format (TNEF) file reading
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <errno.h>
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#include "wtap-int.h"
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#include "file_wrappers.h"
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#include <wsutil/buffer.h>
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#include "tnef.h"
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static int tnef_file_type_subtype = -1;
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void register_tnef(void);
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wtap_open_return_val tnef_open(wtap *wth, int *err, gchar **err_info)
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{
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guint32 magic;
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if (!wtap_read_bytes(wth->fh, &magic, sizeof magic, err, err_info))
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return (*err != WTAP_ERR_SHORT_READ) ? WTAP_OPEN_ERROR : WTAP_OPEN_NOT_MINE;
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if (GUINT32_TO_LE(magic) != TNEF_SIGNATURE)
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/* Not a tnef file */
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return WTAP_OPEN_NOT_MINE;
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/* seek back to the start of the file */
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
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return WTAP_OPEN_ERROR;
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wth->file_type_subtype = tnef_file_type_subtype;
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wth->file_encap = WTAP_ENCAP_TNEF;
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wth->snapshot_length = 0;
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wth->subtype_read = wtap_full_file_read;
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wth->subtype_seek_read = wtap_full_file_seek_read;
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wth->file_tsprec = WTAP_TSPREC_SEC;
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return WTAP_OPEN_MINE;
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}
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static const struct supported_block_type tnef_blocks_supported[] = {
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/*
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* This is a file format that we dissect, so we provide only one
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* "packet" with the file's contents, and don't support any
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* options.
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*/
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{ WTAP_BLOCK_PACKET, ONE_BLOCK_SUPPORTED, NO_OPTIONS_SUPPORTED }
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};
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static const struct file_type_subtype_info tnef_info = {
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"Transport-Neutral Encapsulation Format", "tnef", NULL, NULL,
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FALSE, BLOCKS_SUPPORTED(tnef_blocks_supported),
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NULL, NULL, NULL
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};
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void register_tnef(void)
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{
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tnef_file_type_subtype = wtap_register_file_type_subtype(&tnef_info);
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/*
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* Register name for backwards compatibility with the
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* wtap_filetypes table in Lua.
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*/
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wtap_register_backwards_compatibility_lua_name("TNEF",
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tnef_file_type_subtype);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local Variables:
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* c-basic-offset: 2
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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