Add dissector for Real Time Location System (RTLS)

Change-Id: I494cbb8c3c6da18dfd7901d098dde6448226f67e
Reviewed-on: https://code.wireshark.org/review/15711
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>

1 files changed, 804 insertions, 0 deletions

diff --git a/epan/dissectors/packet-rtls.c b/epan/dissectors/packet-rtls.c
new file mode 100644
index 0000000000..5c18bda9c2
--- /dev/null
+++ b/epan/dissectors/packet-rtls.c
@@ -0,0 +1,804 @@
+/* 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
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * (A short description of the protocol including links to specifications,
+ *  detailed documentation, etc.)
+ */
+
+#include <config.h>
+
+#include <epan/packet.h>
+#include <epan/expert.h>
+
+void proto_reg_handoff_rtls(void);
+void proto_register_rtls(void);
+
+static int proto_rtls = -1;
+static int hf_rtls_message_type = -1;
+static int hf_rtls_message_id = -1;
+static int hf_rtls_version_major = -1;
+static int hf_rtls_version_minor = -1;
+static int hf_rtls_data_length = -1;
+static int hf_rtls_ap_mac = -1;
+static int hf_rtls_padding = -1;
+static int hf_rtls_reserved = -1;
+static int hf_rtls_signature = -1;
+
+static int hf_rtls_as_tag_addr = -1;
+static int hf_rtls_sr_mac_address = -1;
+static int hf_rtls_nack_flags = -1;
+static int hf_rtls_nack_flags_internal_error = -1;
+static int hf_rtls_nack_flags_station_not_found = -1;
+static int hf_rtls_nack_flags_reserved = -1;
+static int hf_rtls_tr_bssid = -1;
+static int hf_rtls_tr_rssi = -1;
+static int hf_rtls_tr_rssi_calculated = -1;
+static int hf_rtls_tr_noise_floor = -1;
+static int hf_rtls_tr_timestamp = -1;
+static int hf_rtls_tr_tag_mac = -1;
+static int hf_rtls_tr_frame_control = -1;
+static int hf_rtls_tr_sequence = -1;
+static int hf_rtls_tr_data_rate = -1;
+static int hf_rtls_tr_tx_power = -1;
+static int hf_rtls_tr_channel = -1;
+static int hf_rtls_tr_battery = -1;
+static int hf_rtls_sr_mac = -1;
+static int hf_rtls_sr_noise_floor = -1;
+static int hf_rtls_sr_data_rate = -1;
+static int hf_rtls_sr_channel = -1;
+static int hf_rtls_sr_rssi = -1;
+static int hf_rtls_sr_rssi_calculated = -1;
+static int hf_rtls_sr_type = -1;
+static int hf_rtls_sr_associated = -1;
+static int hf_rtls_sr_radio_bssid = -1;
+static int hf_rtls_sr_mon_bssid = -1;
+static int hf_rtls_sr_age = -1;
+static int hf_rtls_ser_mac = -1;
+static int hf_rtls_ser_bssid = -1;
+static int hf_rtls_ser_essid = -1;
+static int hf_rtls_ser_channel = -1;
+static int hf_rtls_ser_phy_type = -1;
+static int hf_rtls_ser_rssi = -1;
+static int hf_rtls_ser_rssi_calculated = -1;
+static int hf_rtls_ser_duration = -1;
+static int hf_rtls_ser_num_packets = -1;
+static int hf_rtls_ser_noise_floor = -1;
+static int hf_rtls_ser_classification = -1;
+static int hf_rtls_aer_bssid = -1;
+static int hf_rtls_aer_essid = -1;
+static int hf_rtls_aer_channel = -1;
+static int hf_rtls_aer_phy_type = -1;
+static int hf_rtls_aer_rssi = -1;
+static int hf_rtls_aer_rssi_calculated = -1;
+static int hf_rtls_aer_duration = -1;
+static int hf_rtls_aer_num_packets = -1;
+static int hf_rtls_aer_noise_floor = -1;
+static int hf_rtls_aer_classification = -1;
+static int hf_rtls_aer_match_type = -1;
+static int hf_rtls_aer_match_method = -1;
+static int hf_rtls_cmr_messages = -1;
+
+static const int *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 = EI_INIT;
+static gint ett_rtls = -1;
+static gint ett_rtls_message = -1;
+static gint ett_rtls_nack_flags = -1;
+
+#define RTLS_MIN_LENGTH 16
+
+#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(gchar *result, guint32 rssi)
+{
+    /* Convert Hex to decimal and subtract 256 to get the signal value */
+    g_snprintf(result, ITEM_LABEL_LENGTH, "%d", rssi - 256);
+
+}
+
+static int
+dissect_rtls_header(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *rtls_tree, guint offset, guint *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
+dissect_rtls_message_type(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *rtls_tree, guint offset, guint 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|ENC_NA);
+            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|ENC_NA);
+            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:{
+            guint32 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){
+                guint32 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_const(type, rtls_message_type_vals, "(unknown %d)"));
+
+                offset = dissect_rtls_header(tvb, pinfo, sub_tree, offset, &data_length);
+
+                offset = dissect_rtls_message_type(tvb, pinfo, sub_tree, offset, type);
+
+                proto_item_set_len(sub_tree, data_length + 16);
+                cmr_messages--;
+            }
+            }
+        break;
+        default:{
+            guint32 remaining;
+
+            remaining = tvb_reported_length_remaining(tvb, offset) - 20; /* Remove 20 of signature */
+            proto_tree_add_expert(rtls_tree, pinfo, &ei_rtls_undecoded, tvb, offset, remaining);
+            offset += remaining;
+            }
+        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;
+    guint       offset = 0;
+    guint32     type;
+
+    if (tvb_reported_length(tvb) < RTLS_MIN_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_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str_const(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, 20, 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 Major", "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.as_tag_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, 0x0D,
+            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_packes",
+            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_packes",
+            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 gint *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");
+
+    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)
+{
+    dissector_handle_t rtls_handle;
+
+    rtls_handle = create_dissector_handle(dissect_rtls, proto_rtls);
+    dissector_add_for_decode_as("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:
+ */