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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.
*
* 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
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* Edit this file with 4-space tabs */
#include "config.h"
#include <epan/packet.h>
#include <wiretap/wtap.h>
void proto_register_l1_events(void);
void proto_reg_handoff_l1_events(void);
static dissector_handle_t l1_events_handle;
/*
* dissector for line-based text messages from layer 1
*/
/* Filterable header fields */
static int proto_l1_events;
/* Subtrees */
static int ett_l1_events;
static int
dissect_l1_events(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *subtree;
proto_item *ti;
int offset = 0, next_offset;
int len;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Layer1");
col_set_str(pinfo->cinfo, COL_DEF_SRC,
pinfo->pseudo_header->l1event.uton? "TE" : "NT");
len = tvb_find_line_end(tvb, 0, -1, &next_offset, false);
if(len>0)
col_add_str(pinfo->cinfo, COL_INFO, tvb_format_text(pinfo->pool, tvb, 0, len));
if (tree) {
ti = proto_tree_add_item(tree, proto_l1_events,
tvb, 0, -1, ENC_NA);
subtree = proto_item_add_subtree(ti, ett_l1_events);
/* Read the media line by line */
while (tvb_offset_exists(tvb, offset)) {
/*
* XXX - we need to be passed the parameters
* of the content type via data parameter,
* 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, -1, &next_offset, false);
if (len == -1)
break;
/* We use next_offset - offset instead of len in the
* call to proto_tree_add_format_text() so it will include the
* line terminator(s) (\r and/or \n) in the display.
*/
proto_tree_add_format_text(subtree, tvb, offset, next_offset - offset);
offset = next_offset;
}
}
return tvb_captured_length(tvb);
}
void
proto_register_l1_events(void)
{
static int *ett[] = {
&ett_l1_events,
};
proto_register_subtree_array(ett, array_length(ett));
proto_l1_events = proto_register_protocol("Layer 1 Event Messages", "Layer 1 Events", "data-l1-events");
l1_events_handle = register_dissector("data-l1-events", dissect_l1_events, proto_l1_events);
}
void
proto_reg_handoff_l1_events(void)
{
dissector_add_uint("wtap_encap", WTAP_ENCAP_LAYER1_EVENT, l1_events_handle); /* for text msgs from trace files */
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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