147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/* packet-l1-events.c
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* Routines for text-based layer 1 messages in EyeSDN trace files
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*
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* (C) Rolf Fiedler 2008, based on packet-text-media.c by Olivier Biot, 2004.
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*
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* Refer to the AUTHORS file or the AUTHORS section in the man page
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* for contacting the author(s) of this file.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Edit this file with 4-space tabs */
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <wiretap/wtap.h>
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#include <epan/strutil.h>
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void proto_register_l1_events(void);
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void proto_reg_handoff_l1_events(void);
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/*
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* dissector for line-based text messages from layer 1
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*/
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/* Filterable header fields */
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static gint proto_l1_events = -1;
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/* Subtrees */
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static gint ett_l1_events = -1;
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static int
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dissect_l1_events(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
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{
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proto_tree *subtree;
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proto_item *ti;
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gint offset = 0, next_offset;
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gint len;
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const char *data_name;
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data_name = pinfo->match_string;
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if (! (data_name && data_name[0])) {
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/*
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* No information from "match_string"
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*/
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data_name = (char *)data;
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if (! (data_name && data_name[0])) {
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/*
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* No information from dissector data
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*/
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data_name = (char *)(pinfo->private_data);
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if (! (data_name && data_name[0])) {
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/*
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* No information from "private_data"
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*/
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data_name = NULL;
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}
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}
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}
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Layer1");
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col_set_str(pinfo->cinfo, COL_DEF_SRC,
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pinfo->pseudo_header->l1event.uton? "TE" : "NT");
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len = tvb_find_line_end(tvb, 0, tvb_ensure_length_remaining(tvb, 0),
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&next_offset, FALSE);
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if(len>0)
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col_add_str(pinfo->cinfo, COL_INFO, tvb_format_text(tvb, 0, len));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_l1_events,
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tvb, 0, -1, ENC_NA);
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if (data_name)
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proto_item_append_text(ti, ": %s", data_name);
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subtree = proto_item_add_subtree(ti, ett_l1_events);
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/* Read the media line by line */
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while (tvb_reported_length_remaining(tvb, offset) != 0) {
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/*
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* XXX - we need to be passed the parameters
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* of the content type via "pinfo->private_data",
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* so that we know the character set. We'd
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* have to handle that character set, which
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* might be a multibyte character set such
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* as "iso-10646-ucs-2", or might require other
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* special processing.
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*/
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len = tvb_find_line_end(tvb, offset,
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tvb_ensure_length_remaining(tvb, offset),
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&next_offset, FALSE);
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if (len == -1)
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break;
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/* We use next_offset - offset instead of len in the
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* call to proto_tree_add_format_text() so it will include the
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* line terminator(s) (\r and/or \n) in the display.
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*/
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proto_tree_add_format_text(subtree, tvb, offset, next_offset - offset);
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offset = next_offset;
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}
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}
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return tvb_length(tvb);
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}
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void
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proto_register_l1_events(void)
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{
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static gint *ett[] = {
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&ett_l1_events,
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};
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proto_register_subtree_array(ett, array_length(ett));
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proto_l1_events = proto_register_protocol(
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"Layer 1 Event Messages", /* Long name */
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"Layer 1 Events", /* Short name */
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"data-l1-events"); /* Filter name */
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new_register_dissector("data-l1-events", dissect_l1_events, proto_l1_events);
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}
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void
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proto_reg_handoff_l1_events(void)
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{
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dissector_handle_t l1_events_handle;
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l1_events_handle = find_dissector("data-l1-events");
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dissector_add_uint("wtap_encap", WTAP_ENCAP_LAYER1_EVENT, l1_events_handle); /* for text msgs from trace files */
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}
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