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/* packet-l1-events.c
* Routines for text-based layer 1 messages in EyeSDN trace files
*
* (C) Rolf Fiedler 2008, based on packet-text-media.c by Olivier Biot, 2004.
*
* $Id$
*
* Refer to the AUTHORS file or the AUTHORS section in the man page
* for contacting the author(s) of this file.
*
* 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.
*/
/* Edit this file with 4-space tabs */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/strutil.h>
/*
* dissector for line-based text messages from layer 1
*/
/* Filterable header fields */
static gint proto_l1_events = -1;
/* Subtrees */
static gint ett_l1_events = -1;
static void
dissect_l1_events(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *subtree;
proto_item *ti;
gint offset = 0, next_offset;
gint len;
const char *data_name;
data_name = pinfo->match_string;
if (! (data_name && data_name[0])) {
/*
* No information from "match_string"
*/
data_name = (char *)(pinfo->private_data);
if (! (data_name && data_name[0])) {
/*
* No information from "private_data"
*/
data_name = NULL;
}
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Layer1");
if (check_col(pinfo->cinfo, COL_DEF_SRC))
col_set_str(pinfo->cinfo, COL_DEF_SRC,
pinfo->pseudo_header->l1event.uton? "TE" : "NT");
if (check_col(pinfo->cinfo, COL_INFO)) {
len = tvb_find_line_end(tvb, 0,
tvb_ensure_length_remaining(tvb, 0),
&next_offset, FALSE);
if(len>0)
col_add_str(pinfo->cinfo, COL_INFO,
tvb_format_text(tvb, 0, len));
}
if (tree) {
ti = proto_tree_add_item(tree, proto_l1_events,
tvb, 0, -1, ENC_NA);
if (data_name)
proto_item_append_text(ti, ": %s", data_name);
subtree = proto_item_add_subtree(ti, ett_l1_events);
/* Read the media line by line */
while (tvb_reported_length_remaining(tvb, offset) != 0) {
/*
* XXX - we need to be passed the parameters
* of the content type via "pinfo->private_data",
* so that we know the character set. We'd
* have to handle that character set, which
* might be a multibyte character set such
* as "iso-10646-ucs-2", or might require other
* special processing.
*/
len = tvb_find_line_end(tvb, offset,
tvb_ensure_length_remaining(tvb, offset),
&next_offset, FALSE);
if (len == -1)
break;
/* We use next_offset - offset instead of len in the
* call to tvb_format_text() so it will include the
* line terminator(s) (\r and/or \n) in the display.
*/
proto_tree_add_text(subtree, tvb, offset, next_offset - offset,
"%s", tvb_format_text(tvb, offset,
next_offset - offset));
offset = next_offset;
}
}
}
void
proto_register_l1_events(void)
{
static gint *ett[] = {
&ett_l1_events,
};
proto_register_subtree_array(ett, array_length(ett));
proto_l1_events = proto_register_protocol(
"Layer 1 Event Messages", /* Long name */
"Layer 1 Events", /* Short name */
"data-l1-events"); /* Filter name */
register_dissector("data-l1-events", dissect_l1_events, proto_l1_events);
}
void
proto_reg_handoff_l1_events(void)
{
dissector_handle_t l1_events_handle;
l1_events_handle = find_dissector("data-l1-events");
dissector_add_uint("wtap_encap", WTAP_ENCAP_LAYER1_EVENT, l1_events_handle); /* for text msgs from trace files */
}
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