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/* packet-cimetrics.c
* Routines for Cimetrics LLC OUI dissection
* Copyright 2008 Steve Karg <skarg@users.sourceforge.net> Alabama
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include "packet-llc.h"
#include <epan/oui.h>
#include "packet-mstp.h"
void proto_register_cimetrics(void);
void proto_reg_handoff_cimetrics(void);
/* Probably should be a preference, but here for now */
#define BACNET_MSTP_SUMMARY_IN_TREE
/* the U+4 device does MS/TP, uLAN, Modbus */
static const value_string cimetrics_pid_vals[] = {
{ 0x0001, "U+4 MS/TP" },
{ 0, NULL }
};
static int proto_cimetrics_mstp = -1;
static int hf_llc_cimetrics_pid = -1;
static gint ett_cimetrics_mstp = -1;
static int hf_cimetrics_mstp_timer = -1;
static int hf_cimetrics_mstp_value = -1;
static dissector_handle_t cimetric_handle;
static int
dissect_cimetrics_mstp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *subtree;
gint offset = 0;
#ifdef BACNET_MSTP_SUMMARY_IN_TREE
guint8 mstp_frame_type = 0;
guint8 mstp_frame_source = 0;
guint8 mstp_frame_destination = 0;
#endif
#ifdef BACNET_MSTP_SUMMARY_IN_TREE
mstp_frame_type = tvb_get_guint8(tvb, offset+3);
mstp_frame_destination = tvb_get_guint8(tvb, offset+4);
mstp_frame_source = tvb_get_guint8(tvb, offset+5);
ti = proto_tree_add_protocol_format(tree,
proto_cimetrics_mstp, tvb, offset, 9,
"BACnet MS/TP, Src (%u), Dst (%u), %s",
mstp_frame_source, mstp_frame_destination,
mstp_frame_type_text(mstp_frame_type));
#else
ti = proto_tree_add_item(tree, proto_cimetrics_mstp, tvb, offset, 9, ENC_NA);
#endif
subtree = proto_item_add_subtree(ti, ett_cimetrics_mstp);
proto_tree_add_item(subtree, hf_cimetrics_mstp_timer, tvb,
offset++, 2, ENC_LITTLE_ENDIAN);
offset++;
proto_tree_add_item(subtree, hf_cimetrics_mstp_value, tvb,
offset++, 1, ENC_LITTLE_ENDIAN);
dissect_mstp(tvb, pinfo, tree, subtree, offset);
return tvb_captured_length(tvb);
}
void
proto_register_cimetrics(void)
{
static hf_register_info hf[] = {
{ &hf_cimetrics_mstp_timer,
{ "Delta Time", "cimetrics.mstp_timer",
FT_UINT16, BASE_DEC, NULL, 0,
"Milliseconds", HFILL }
},
{ &hf_cimetrics_mstp_value,
{ "8-bit value", "cimetrics.mstp_value",
FT_UINT8, BASE_DEC, NULL, 0,
"value", HFILL }
}
};
static hf_register_info hf2[] = {
{ &hf_llc_cimetrics_pid,
{ "PID", "llc.cimetrics_pid",
FT_UINT16, BASE_HEX, VALS(cimetrics_pid_vals), 0,
NULL, HFILL }
}
};
static gint *ett[] = {
&ett_cimetrics_mstp
};
proto_cimetrics_mstp = proto_register_protocol("Cimetrics MS/TP",
"Cimetrics MS/TP", "cimetrics");
proto_register_field_array(proto_cimetrics_mstp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
cimetric_handle = register_dissector("cimetrics", dissect_cimetrics_mstp, proto_cimetrics_mstp);
llc_add_oui(OUI_CIMETRICS, "llc.cimetrics_pid",
"LLC Cimetrics OUI PID", hf2, proto_cimetrics_mstp);
}
void
proto_reg_handoff_cimetrics(void)
{
dissector_add_uint("llc.cimetrics_pid", 1, cimetric_handle);
}
/*
* 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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