Implement Export PDU for tshark

This patch introduces the "-U tap_name[,filter]" tshark option and
is similar to the "Export PDUs as file" option in Wireshark.

Wireshark implements this feature by reopening a capture file, applying
a tap and finally opening the temporary file. Since tshark knows
in advance that a PDU export is needed, it can optimize by not creating
the temporary file and perform the export at the first opportunity.

This patch splits the opening/tapping functionality from error reporting
since tshark does not need a temp file and has no dialogs.

The capture file comment is now specified explicitly as there is no
"current file" anymore if the tap is running without active file.

TODO:

 - Review whether it is acceptable to overwrite save_file in tshark.
 - Add documentation (tshark manpage).

Bug: 3444
Change-Id: Ie159495d42c32c2ba7400f2991b7b8185b3fda09
Reviewed-on: https://code.wireshark.org/review/5890
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/ui/export_pdu_ui_utils.h b/ui/export_pdu_ui_utils.h
new file mode 100644
index 0000000000..54cbd13063
--- /dev/null
+++ b/ui/export_pdu_ui_utils.h
@@ -0,0 +1,43 @@
+/*
+* export_pdu_ui_utils.h
+* Routines for exported_pdu dissection
+* Copyright 2013, Anders Broman <anders-broman@ericsson.com>
+*
+* Wireshark - Network traffic analyzer
+* By Gerald Combs <gerald@wireshark.org>
+* Copyright 1998 Gerald Combs
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License along
+* with this program; if not, write to the Free Software Foundation, Inc.,
+* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef EXPORT_PDU_UI_UTILS_H
+#define EXPORT_PDU_UI_UTILS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+* Filters the current opened capture file into a temporary file. On success,
+* TRUE is returned and the filtered file is opened into the UI.
+*/
+gboolean do_export_pdu(const char *filter, gchar *tap_name, exp_pdu_t *data);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* EXPORT_PDU_UI_UTILS_H */