2008-11-27 16:40:45 +00:00
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/* 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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2018-02-07 11:26:45 +00:00
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* SPDX-License-Identifier: GPL-2.0-or-later
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2008-11-27 16:40:45 +00:00
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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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2014-07-15 23:40:46 +00:00
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#include <wsutil/buffer.h>
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2008-11-27 16:40:45 +00:00
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#include "tnef.h"
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2015-05-09 01:33:56 +00:00
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wtap_open_return_val tnef_open(wtap *wth, int *err, gchar **err_info)
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2008-11-27 16:40:45 +00:00
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{
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guint32 magic;
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Add some higher-level file-read APIs and use them.
Add wtap_read_bytes(), which takes a FILE_T, a pointer, a byte count, an
error number pointer, and an error string pointer as arguments, and that
treats a short read of any sort, including a read that returns 0 bytes,
as a WTAP_ERR_SHORT_READ error, and that returns the error number and
string through its last two arguments.
Add wtap_read_bytes_or_eof(), which is similar, but that treats a read
that returns 0 bytes as an EOF, supplying an error number of 0 as an EOF
indication.
Use those in file readers; that simplifies the code and makes it less
likely that somebody will fail to supply the error number and error
string on a file read error.
Change-Id: Ia5dba2a6f81151e87b614461349d611cffc16210
Reviewed-on: https://code.wireshark.org/review/4512
Reviewed-by: Guy Harris <guy@alum.mit.edu>
2014-10-07 01:00:57 +00:00
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if (!wtap_read_bytes(wth->fh, &magic, sizeof magic, err, err_info))
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2014-10-09 23:44:15 +00:00
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return (*err != WTAP_ERR_SHORT_READ) ? WTAP_OPEN_ERROR : WTAP_OPEN_NOT_MINE;
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2008-11-27 16:40:45 +00:00
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2013-11-29 18:44:00 +00:00
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if (GUINT32_TO_LE(magic) != TNEF_SIGNATURE)
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2008-11-27 16:40:45 +00:00
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/* Not a tnef file */
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_NOT_MINE;
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2008-11-27 16:40:45 +00:00
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/* seek back to the start of the file */
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2014-05-09 05:18:49 +00:00
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_ERROR;
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2008-11-27 16:40:45 +00:00
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2014-05-09 05:18:49 +00:00
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wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_TNEF;
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wth->file_encap = WTAP_ENCAP_TNEF;
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wth->snapshot_length = 0;
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2008-11-27 16:40:45 +00:00
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2018-11-10 22:03:16 +00:00
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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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2014-09-28 18:37:06 +00:00
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wth->file_tsprec = WTAP_TSPREC_SEC;
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2008-11-27 16:40:45 +00:00
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2014-10-09 23:44:15 +00:00
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return WTAP_OPEN_MINE;
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2008-11-27 16:40:45 +00:00
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}
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2015-01-02 00:45:22 +00:00
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/*
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2019-07-26 18:43:17 +00:00
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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2015-01-02 00:45:22 +00:00
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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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