/* packet-rtls.c

 * Routines for Real Time Location System dissection

 * Copyright 2016, Alexis La Goutte (See Authors)

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 */

/*

 * http://community.arubanetworks.com/aruba/attachments/aruba/unified-wired-wireless-access/23715/1/RTLS_integrationv6.docx

 */

#include <config.h>

#include <epan/packet.h>

#include <epan/expert.h>

void proto_reg_handoff_rtls(void);

void proto_register_rtls(void);

static dissector_handle_t rtls_handle;

static int proto_rtls;

static int hf_rtls_message_type;

static int hf_rtls_message_id;

static int hf_rtls_version_major;

static int hf_rtls_version_minor;

static int hf_rtls_data_length;

static int hf_rtls_ap_mac;

static int hf_rtls_padding;

static int hf_rtls_reserved;

static int hf_rtls_signature;

static int hf_rtls_as_tag_addr;

static int hf_rtls_sr_mac_address;

static int hf_rtls_nack_flags;

static int hf_rtls_nack_flags_internal_error;

static int hf_rtls_nack_flags_station_not_found;

static int hf_rtls_nack_flags_reserved;

static int hf_rtls_tr_bssid;

static int hf_rtls_tr_rssi;

static int hf_rtls_tr_rssi_calculated;

static int hf_rtls_tr_noise_floor;

static int hf_rtls_tr_timestamp;

static int hf_rtls_tr_tag_mac;

static int hf_rtls_tr_frame_control;

static int hf_rtls_tr_sequence;

static int hf_rtls_tr_data_rate;

static int hf_rtls_tr_tx_power;

static int hf_rtls_tr_channel;

static int hf_rtls_tr_battery;

static int hf_rtls_sr_mac;

static int hf_rtls_sr_noise_floor;

static int hf_rtls_sr_data_rate;

static int hf_rtls_sr_channel;

static int hf_rtls_sr_rssi;

static int hf_rtls_sr_rssi_calculated;

static int hf_rtls_sr_type;

static int hf_rtls_sr_associated;

static int hf_rtls_sr_radio_bssid;

static int hf_rtls_sr_mon_bssid;

static int hf_rtls_sr_age;

static int hf_rtls_ser_mac;

static int hf_rtls_ser_bssid;

static int hf_rtls_ser_essid;

static int hf_rtls_ser_channel;

static int hf_rtls_ser_phy_type;

static int hf_rtls_ser_rssi;

static int hf_rtls_ser_rssi_calculated;

static int hf_rtls_ser_duration;

static int hf_rtls_ser_num_packets;

static int hf_rtls_ser_noise_floor;

static int hf_rtls_ser_classification;

static int hf_rtls_aer_bssid;

static int hf_rtls_aer_essid;

static int hf_rtls_aer_channel;

static int hf_rtls_aer_phy_type;

static int hf_rtls_aer_rssi;

static int hf_rtls_aer_rssi_calculated;

static int hf_rtls_aer_duration;

static int hf_rtls_aer_num_packets;

static int hf_rtls_aer_noise_floor;

static int hf_rtls_aer_classification;

static int hf_rtls_aer_match_type;

static int hf_rtls_aer_match_method;

static int hf_rtls_cmr_messages;

static int * const rtls_nack_flags[] = {

    &hf_rtls_nack_flags_internal_error,

    &hf_rtls_nack_flags_station_not_found,

    &hf_rtls_nack_flags_reserved,

    NULL

};

static expert_field ei_rtls_undecoded;

static int ett_rtls;

static int ett_rtls_message;

static int ett_rtls_nack_flags;

#define RTLS_HDR_LENGTH 16

#define RTLS_SIGN_LENGTH 20

#define AR_AS_CONFIG_SET            0x0000

#define AR_STATION_REQUEST          0x0001

#define AR_ACK                      0x0010

#define AR_NACK                     0x0011

#define AR_TAG_REPORT               0x0012

#define AR_STATION_REPORT           0x0013

#define AR_COMPOUND_MESSAGE_REPORT  0x0014

#define AR_AP_NOTIFICATION          0x0015

#define AR_MMS_CONFIG_SET           0x0016

#define AR_STATION_EX_REPORT        0x0017

#define AR_AP_EX_REPORT             0x0018

static const value_string rtls_message_type_vals[] = {

    { AR_AS_CONFIG_SET, "AR_AS_CONFIG_SET" },

    { AR_STATION_REQUEST, "AR_STATION_REQUEST" },

    { AR_ACK, "AR_ACK"},

    { AR_NACK, "AR_NACK"},

    { AR_TAG_REPORT, "AR_TAG_REPORT"},

    { AR_STATION_REPORT, "AR_STATION_REPORT"},

    { AR_COMPOUND_MESSAGE_REPORT, "AR_COMPOUND_MESSAGE_REPORT"},

    { AR_AP_NOTIFICATION, "AR_AP_NOTIFICATION"},

    { AR_MMS_CONFIG_SET, "AR_MMS_CONFIG_SET"},

    { AR_STATION_EX_REPORT, "AR_STATION_EX_REPORT"},

    { AR_AP_EX_REPORT, "AR_AP_EX_REPORT"},

    { 0, NULL }

};

static const value_string rtls_sr_type_vals[] = {

    { 1, "AR_WLAN_CLIENT" },

    { 2, "AR_WLAN_AP" },

    {0, NULL}

};

static const value_string rtls_sr_associated_vals[] = {

    { 1, "AR_WLAN_ASSOCIATED (All APs and Associated Stations)" },

    { 2, "AR_WLAN_UNASSOCIATED (Unassociated Stations)" },

    {0, NULL}

};

static const value_string rtls_data_rate_vals[] = {

    { 0x00, "1 Mbits" },

    { 0x01, "2 Mbits" },

    { 0x02, "5.5 Mbits" },

    { 0x03, "6 Mbits" },

    { 0x04, "9 Mbits" },

    { 0x05, "11 Mbits" },

    { 0x06, "12 Mbits" },

    { 0x07, "18 Mbits" },

    { 0x08, "24 Mbits" },

    { 0x09, "36 Mbits" },

    { 0x0A, "48 Mbits" },

    { 0x0B, "54 Mbits" },

    {0, NULL}

};

static const value_string rtls_ex_phy_type_vals[] = {

    { 1, "802.11b" },

    { 2, "802.11a" },

    { 3, "802.11g" },

    { 4, "802.11ag" },

    {0, NULL}

};

static const value_string rtls_ex_classification_vals[] = {

    { 1, "Valid" },

    { 2, "interfering" },

    { 3, "DOS'ed" },

    {0, NULL}

};

static void

rssi_base_custom(char *result, uint32_t rssi)

{

    /* Convert Hex to decimal and subtract 256 to get the signal value */

    snprintf(result, ITEM_LABEL_LENGTH, "%d", rssi - 256);

}

static int

dissect_rtls_header(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *rtls_tree, unsigned offset, unsigned *data_length)

{

    proto_tree_add_item(rtls_tree, hf_rtls_message_type, tvb, offset, 2, ENC_BIG_ENDIAN);

    offset += 2;

    proto_tree_add_item(rtls_tree, hf_rtls_message_id, tvb, offset, 2, ENC_BIG_ENDIAN);

    offset += 2;

    proto_tree_add_item(rtls_tree, hf_rtls_version_major, tvb, offset, 1, ENC_BIG_ENDIAN);

    offset += 1;

    proto_tree_add_item(rtls_tree, hf_rtls_version_minor, tvb, offset, 1, ENC_BIG_ENDIAN);

    offset += 1;

    proto_tree_add_item(rtls_tree, hf_rtls_data_length, tvb, offset, 2, ENC_BIG_ENDIAN);

    if(data_length){

        *data_length = tvb_get_ntohs(tvb, offset);

    }

    offset += 2;

    proto_tree_add_item(rtls_tree, hf_rtls_ap_mac, tvb, offset, 6, ENC_NA);

    offset += 6;

    proto_tree_add_item(rtls_tree, hf_rtls_padding, tvb, offset, 2, ENC_NA);

    offset += 2;

    return offset;

}

static int

// NOLINTNEXTLINE(misc-no-recursion)

dissect_rtls_message_type(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *rtls_tree, unsigned offset, unsigned type)

{

    proto_item *ti_rssi;

    switch(type){

        case AR_AS_CONFIG_SET:

            proto_tree_add_item(rtls_tree, hf_rtls_as_tag_addr, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_reserved, tvb, offset, 2, ENC_NA);

            offset += 2;

        break;

        case AR_STATION_REQUEST:

            proto_tree_add_item(rtls_tree, hf_rtls_sr_mac_address, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_reserved, tvb, offset, 2, ENC_NA);

            offset += 2;

        break;

        case AR_ACK:

        case AR_AP_NOTIFICATION:

            /* No Payload */

        break;

        case AR_NACK:

            proto_tree_add_bitmask_with_flags(rtls_tree, tvb, offset,

hf_rtls_nack_flags, ett_rtls_nack_flags, rtls_nack_flags, ENC_BIG_ENDIAN, BMT_NO_APPEND);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_reserved, tvb, offset, 2, ENC_NA);

            offset += 2;

        break;

        case AR_TAG_REPORT:

            proto_tree_add_item(rtls_tree, hf_rtls_tr_bssid, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_rssi, tvb, offset, 1, ENC_BIG_ENDIAN);

            ti_rssi = proto_tree_add_item(rtls_tree, hf_rtls_tr_rssi_calculated, tvb, offset, 1, ENC_BIG_ENDIAN);

            proto_item_set_generated(ti_rssi);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_noise_floor, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_timestamp, tvb, offset, 4, ENC_BIG_ENDIAN);

            offset += 4;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_tag_mac, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_frame_control, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_sequence, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_data_rate, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_tx_power, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_channel, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_tr_battery, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_reserved, tvb, offset, 2, ENC_NA);

            offset += 2;

        break;

       case AR_STATION_REPORT:

            proto_tree_add_item(rtls_tree, hf_rtls_sr_mac, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_noise_floor, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_data_rate, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_channel, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_rssi, tvb, offset, 1, ENC_BIG_ENDIAN);

            ti_rssi = proto_tree_add_item(rtls_tree, hf_rtls_sr_rssi_calculated, tvb, offset, 1, ENC_BIG_ENDIAN);

            proto_item_set_generated(ti_rssi);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_type, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_associated, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_radio_bssid, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_mon_bssid, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_sr_age, tvb, offset, 4, ENC_BIG_ENDIAN);

            offset += 4;

        break;

       case AR_STATION_EX_REPORT:

            proto_tree_add_item(rtls_tree, hf_rtls_ser_mac, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_bssid, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_essid, tvb, offset, 33, ENC_ASCII);

            offset += 33;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_channel, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_phy_type, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_rssi, tvb, offset, 1, ENC_BIG_ENDIAN);

            ti_rssi = proto_tree_add_item(rtls_tree, hf_rtls_ser_rssi_calculated, tvb, offset, 1, ENC_BIG_ENDIAN);

            proto_item_set_generated(ti_rssi);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_duration, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_num_packets, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_noise_floor, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_ser_classification, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_reserved, tvb, offset, 2, ENC_NA);

            offset += 2;

        break;

       case AR_AP_EX_REPORT:

            proto_tree_add_item(rtls_tree, hf_rtls_aer_bssid, tvb, offset, 6, ENC_NA );

            offset += 6;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_essid, tvb, offset, 33, ENC_ASCII);

            offset += 33;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_channel, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_phy_type, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_rssi, tvb, offset, 1, ENC_BIG_ENDIAN);

            ti_rssi = proto_tree_add_item(rtls_tree, hf_rtls_aer_rssi_calculated, tvb, offset, 1, ENC_BIG_ENDIAN);

            proto_item_set_generated(ti_rssi);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_duration, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_num_packets, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_noise_floor, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_classification, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_match_type, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_aer_match_method, tvb, offset, 1, ENC_BIG_ENDIAN);

            offset += 1;

            proto_tree_add_item(rtls_tree, hf_rtls_reserved, tvb, offset, 2, ENC_NA);

            offset += 2;

        break;

       case AR_COMPOUND_MESSAGE_REPORT:{

            uint32_t cmr_messages;

            proto_tree *sub_tree;

            proto_tree_add_item_ret_uint(rtls_tree, hf_rtls_cmr_messages, tvb, offset, 2, ENC_BIG_ENDIAN, &cmr_messages);

            offset += 2;

            proto_tree_add_item(rtls_tree, hf_rtls_reserved, tvb, offset, 2, ENC_NA);

            offset += 2;

            while(cmr_messages){

                uint32_t data_length;

                type = tvb_get_ntohs(tvb, offset);

                sub_tree = proto_tree_add_subtree_format(rtls_tree, tvb, offset, -1, ett_rtls_message, NULL, "%s", val_to_str(pinfo->pool, type, rtls_message_type_vals, "(unknown %d)"));

                offset = dissect_rtls_header(tvb, pinfo, sub_tree, offset, &data_length);

                // We recurse here, but we'll run out of packet before we run out of stack.

                offset = dissect_rtls_message_type(tvb, pinfo, sub_tree, offset, type);

                proto_item_set_len(sub_tree, data_length + RTLS_HDR_LENGTH);

                cmr_messages--;

            }

            }

        break;

        default:{

            uint32_t remaining = tvb_reported_length_remaining(tvb, offset);

            if(remaining > RTLS_SIGN_LENGTH){

                proto_tree_add_expert(rtls_tree, pinfo, &ei_rtls_undecoded, tvb, offset, remaining - RTLS_SIGN_LENGTH);

                offset += remaining - RTLS_SIGN_LENGTH;

            }

            }

        break;

    }

    return offset;

}

static int

dissect_rtls(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)

{

    proto_item *ti;

    proto_tree *rtls_tree;

    unsigned    offset = 0;

    uint32_t    type;

    if (tvb_reported_length(tvb) < RTLS_HDR_LENGTH + RTLS_SIGN_LENGTH)

        return 0;

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "RTLS");

    ti = proto_tree_add_item(tree, proto_rtls, tvb, 0, -1, ENC_NA);

    rtls_tree = proto_item_add_subtree(ti, ett_rtls);

    /* RTLS Header */

    type = tvb_get_ntohs(tvb, offset);

    col_add_str(pinfo->cinfo, COL_INFO, val_to_str(pinfo->pool, type, rtls_message_type_vals, "(unknown %d)"));

    offset = dissect_rtls_header(tvb, pinfo, rtls_tree, offset, NULL);

    offset = dissect_rtls_message_type(tvb, pinfo, rtls_tree, offset, type);

    /* TODO: Check signature ? HMAC-SHA1 with shared key and RTLS packet data */

    proto_tree_add_item(rtls_tree, hf_rtls_signature, tvb, offset, RTLS_SIGN_LENGTH, ENC_NA);

    offset += 20;

    return offset;

}

void

proto_register_rtls(void)

{

    expert_module_t *expert_rtls;

    static hf_register_info hf[] = {

        /* RTLS Header*/

        { &hf_rtls_message_type,

          { "Message Type", "rtls.message_type",

            FT_UINT16, BASE_HEX, VALS(rtls_message_type_vals), 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_message_id,

          { "Message Id", "rtls.message_id",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_version_major,

          { "Version Major", "rtls.version_major",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_version_minor,

          { "Version Minor", "rtls.version_minor",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_data_length,

          { "Data Length", "rtls.data_length",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_ap_mac,

          { "AP MAC Address", "rtls.ap_mac",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_padding,

          { "Padding", "rtls.padding",

            FT_BYTES, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_reserved,

          { "Reserved", "rtls.reserved",

            FT_BYTES, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_signature,

          { "Signature", "rtls.signature",

            FT_BYTES, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        /* AR_AS_CONFIG_SET */

        { &hf_rtls_as_tag_addr,

          { "AS Tag Address", "rtls.as_tag_addr",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "Tag multicast address", HFILL }

        },

        /* AR_STATION_REQUEST */

        { &hf_rtls_sr_mac_address,

          { "MAC Address", "rtls.sr_mac_addr",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        /* AR_NACK */

        { &hf_rtls_nack_flags,

          { "Flags", "rtls.nack.flags",

            FT_UINT16, BASE_HEX, NULL, 0x00,

            NULL, HFILL }

        },

        { &hf_rtls_nack_flags_internal_error,

          { "Internal Error", "rtls.nack.flags.internal_errors",

            FT_UINT16, BASE_HEX, NULL, 0x01,

            NULL, HFILL }

        },

        { &hf_rtls_nack_flags_station_not_found,

          { "Station Not found", "rtls.nack.flags.station_not_found",

            FT_UINT16, BASE_HEX, NULL, 0x02,

            NULL, HFILL }

        },

        { &hf_rtls_nack_flags_reserved,

          { "Reserved", "rtls.nack.flags.reserved",

            FT_UINT16, BASE_HEX, NULL, 0xFC,

            NULL, HFILL }

        },

        /* AR_TAG_REPORT */

        { &hf_rtls_tr_bssid,

          { "BSSID", "rtls.tr.bssid",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "MAC address of the radio where the frame was received", HFILL }

        },

        { &hf_rtls_tr_rssi,

          { "RSSI", "rtls.tr.rssi",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Signal as a signed negative hex value", HFILL }

        },

        { &hf_rtls_tr_rssi_calculated,

          { "RSSI (calculated)", "rtls.tr.rssi.calculated",

            FT_UINT8, BASE_CUSTOM, CF_FUNC(rssi_base_custom), 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_tr_noise_floor,

          { "Noise Floor", "rtls.tr.noise_floor",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Noise floor of the radio", HFILL }

        },

        { &hf_rtls_tr_timestamp,

          { "Timestamp", "rtls.tr.timestamp",

            FT_UINT32, BASE_DEC, NULL, 0x0,

            "Millisecond granularity timestamp that represents local time in AP when message was sent", HFILL }

        },

        { &hf_rtls_tr_tag_mac,

          { "Tag Mac", "rtls.tr.tag_mac",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "MAC address of the tag", HFILL }

        },

        { &hf_rtls_tr_frame_control,

          { "Frame Control", "rtls.tr.frame_control",

            FT_UINT16, BASE_HEX, NULL, 0x0,

            "Frame control from 802.11 header", HFILL }

        },

        { &hf_rtls_tr_sequence,

          { "Sequence", "rtls.tr.sequence",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            "Sequence number from the 802.11 header", HFILL }

        },

        { &hf_rtls_tr_data_rate,

          { "Data Rate", "rtls.tr.data_rate",

            FT_UINT8, BASE_DEC, VALS(rtls_data_rate_vals), 0x0,

            "Data rate of chirp frame", HFILL }

        },

        { &hf_rtls_tr_tx_power,

          { "Tx Power", "rtls.tr.tx_power",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Transmit power in dbm", HFILL }

        },

        { &hf_rtls_tr_channel,

          { "Channel", "rtls.tr.channel",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Channel of tag transmission", HFILL }

        },

        { &hf_rtls_tr_battery,

          { "Battery", "rtls.tr.battery",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Batter level information from the chirp frame if present", HFILL }

        },

        /* AR_STATION_REPORT */

        { &hf_rtls_sr_mac,

          { "MAC", "rtls.sr.mac",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_sr_noise_floor,

          { "Noise Floor", "rtls.sr.noise_floor",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Noise floor of the channel where the station was last heard", HFILL }

        },

        { &hf_rtls_sr_data_rate,

          { "Data Rate", "rtls.sr.data_rate",

            FT_UINT8, BASE_DEC, VALS(rtls_data_rate_vals), 0x0,

            "Data rate of chirp frame", HFILL }

        },

        { &hf_rtls_sr_channel,

          { "Channel", "rtls.sr.channel",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Channel where station was last heard", HFILL }

        },

        { &hf_rtls_sr_rssi,

          { "RSSI", "rtls.sr.rssi",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Signal as a signed negative hex value", HFILL }

        },

        { &hf_rtls_sr_rssi_calculated,

          { "RSSI (calculated)", "rtls.sr.rssi.calculated",

            FT_UINT8, BASE_CUSTOM, CF_FUNC(rssi_base_custom), 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_sr_type,

          { "Type", "rtls.sr.type",

            FT_UINT8, BASE_DEC, VALS(rtls_sr_type_vals), 0x0,

            "Type of device", HFILL }

        },

        { &hf_rtls_sr_associated,

          { "Associated", "rtls.sr.associated",

            FT_UINT8, BASE_DEC, VALS(rtls_sr_associated_vals), 0x0,

            "Association status of station", HFILL }

        },

        { &hf_rtls_sr_radio_bssid,

          { "Radio BSSID", "rtls.sr.radio_bssids",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "Association status of station BSSID of the radio that detected the device", HFILL }

        },

        { &hf_rtls_sr_mon_bssid,

          { "Mon BSSID", "rtls.sr.mon_bssids",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "BSSID of the AP that the station is associated to", HFILL }

        },

        { &hf_rtls_sr_age,

          { "Age", "rtls.sr.age",

            FT_UINT32, BASE_DEC, NULL, 0x0,

            "The number of seconds since the last packet was heard from this station", HFILL }

        },

        /* AR_STATION_EX_REPORT */

        { &hf_rtls_ser_mac,

          { "MAC", "rtls.ser.mac",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "MAC address of station", HFILL }

        },

        { &hf_rtls_ser_bssid,

          { "BSSID", "rtls.ser.bssid",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "BSSID with which this station is associated", HFILL }

        },

        { &hf_rtls_ser_essid,

          { "ESSID", "rtls.ser.essid",

            FT_STRING, BASE_NONE, NULL, 0x0,

            "ESSID with which this station is associated", HFILL }

        },

        { &hf_rtls_ser_channel,

          { "Channel", "rtls.ser.channel",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Channel where this station is active", HFILL }

        },

        { &hf_rtls_ser_phy_type,

          { "Phy type", "rtls.ser.phy_type",

            FT_UINT8, BASE_DEC, VALS(rtls_ex_phy_type_vals), 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_ser_rssi,

          { "RSSI", "rtls.ser.rssi",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Average RSSI during the duration", HFILL }

        },

        { &hf_rtls_ser_rssi_calculated,

          { "RSSI (calculated)", "rtls.ser.rssi.calculated",

            FT_UINT8, BASE_CUSTOM, CF_FUNC(rssi_base_custom), 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_ser_duration,

          { "Duration", "rtls.ser.duration",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            "Average calculation duration", HFILL }

        },

        { &hf_rtls_ser_num_packets,

          { "Num Packets", "rtls.ser.num_packets",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            "Number of packets used in average RSSI calculation", HFILL }

        },

        { &hf_rtls_ser_noise_floor,

          { "Noise Floor", "rtls.ser.noise_floor",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Noise floor of the radio", HFILL }

        },

        { &hf_rtls_ser_classification,

          { "Classification", "rtls.ser.classification",

            FT_UINT8, BASE_DEC, VALS(rtls_ex_classification_vals), 0x0,

            "Millisecond granularity timestamp that represents local time in AP when message was sent", HFILL }

        },

        /* AR_AP_EX_REPORT */

        { &hf_rtls_aer_bssid,

          { "BSSID", "rtls.aer.bssid",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            "BSSID with which this station is associated", HFILL }

        },

        { &hf_rtls_aer_essid,

          { "ESSID", "rtls.aer.essid",

            FT_STRING, BASE_NONE, NULL, 0x0,

            "ESSID with which this station is associated", HFILL }

        },

        { &hf_rtls_aer_channel,

          { "Channel", "rtls.aer.channel",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Channel where this station is active", HFILL }

        },

        { &hf_rtls_aer_phy_type,

          { "Phy type", "rtls.aer.phy_type",

            FT_UINT8, BASE_DEC, VALS(rtls_ex_phy_type_vals), 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_aer_rssi,

          { "RSSI", "rtls.aer.rssi",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Average RSSI during the duration", HFILL }

        },

        { &hf_rtls_aer_rssi_calculated,

          { "RSSI (calculated)", "rtls.aer.rssi.calculated",

            FT_UINT8, BASE_CUSTOM, CF_FUNC(rssi_base_custom), 0x0,

            NULL, HFILL }

        },

        { &hf_rtls_aer_duration,

          { "Duration", "rtls.aer.duration",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            "Average calculation duration", HFILL }

        },

        { &hf_rtls_aer_num_packets,

          { "Num Packets", "rtls.aer.num_packets",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            "Number of packets used in average RSSI calculation", HFILL }

        },

        { &hf_rtls_aer_noise_floor,

          { "Noise Floor", "rtls.aer.noise_floor",

            FT_UINT8, BASE_DEC, NULL, 0x0,

            "Noise floor of the radio", HFILL }

        },

        { &hf_rtls_aer_classification,

          { "Classification", "rtls.aer.classification",

            FT_UINT8, BASE_DEC, VALS(rtls_ex_classification_vals), 0x0,

            "Millisecond granularity timestamp that represents local time in AP when message was sent", HFILL }

        },

        { &hf_rtls_aer_match_type,

          { "Match Type", "rtls.aer.match_type",

            FT_UINT8, BASE_HEX, NULL, 0x0,

            "Internal Aruba use", HFILL }

        },

        { &hf_rtls_aer_match_method,

          { "Match Method", "rtls.aer.match_method",

            FT_UINT8, BASE_HEX, NULL, 0x0,

            "Internal Aruba use", HFILL }

        },

        { &hf_rtls_cmr_messages,

          { "Messages", "rtls.cmr_messages",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            "number of messages", HFILL }

        },

    };

    static int *ett[] = {

        &ett_rtls,

        &ett_rtls_message,

        &ett_rtls_nack_flags,

    };

    /* Setup protocol expert items */

    static ei_register_info ei[] = {

        { &ei_rtls_undecoded,

          { "rtls.undecoded", PI_UNDECODED, PI_NOTE, "Undecoded Payload", EXPFILL }

        }

    };

    proto_rtls = proto_register_protocol("Real Time Location System", "RTLS", "rtls");

    rtls_handle = register_dissector("rtls", dissect_rtls, proto_rtls);

    proto_register_field_array(proto_rtls, hf, array_length(hf));

    proto_register_subtree_array(ett, array_length(ett));

    expert_rtls = expert_register_protocol(proto_rtls);

    expert_register_field_array(expert_rtls, ei, array_length(ei));

}

void

proto_reg_handoff_rtls(void)

{

    // If this is ever streamed (transported over TCP) we need to add recursion checks

    dissector_add_for_decode_as_with_preference("udp.port", rtls_handle);

}

/*

 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html

 *

 * Local variables:

 * c-basic-offset: 4

 * tab-width: 8

 * indent-tabs-mode: nil

 * End:

 *

 * vi: set shiftwidth=4 tabstop=8 expandtab:

 * :indentSize=4:tabSize=8:noTabs=true:

 */