/* 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;

static int hf_llc_cimetrics_pid;

static int ett_cimetrics_mstp;

static int hf_cimetrics_mstp_timer;

static int hf_cimetrics_mstp_value;

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;

  int offset = 0;

#ifdef BACNET_MSTP_SUMMARY_IN_TREE

  uint8_t mstp_frame_type = 0;

  uint8_t mstp_frame_source = 0;

  uint8_t mstp_frame_destination = 0;

#endif

#ifdef BACNET_MSTP_SUMMARY_IN_TREE

  mstp_frame_type = tvb_get_uint8(tvb, offset+3);

  mstp_frame_destination = tvb_get_uint8(tvb, offset+4);

  mstp_frame_source = tvb_get_uint8(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,

        NULL, 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 int *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:

 */