forked from osmocom/wireshark
31a54708f4
Change-Id: Ie39ef054a4a942687bd079f3a4d8c2cc55d5f22c Reviewed-on: https://code.wireshark.org/review/12485 Petri-Dish: Michael Mann <mmann78@netscape.net> Reviewed-by: Michael Mann <mmann78@netscape.net>
460 lines
20 KiB
C
460 lines
20 KiB
C
/* packet-btmcap.c
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* Routines for Bluetooth MCAP dissection
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* https://www.bluetooth.org/Technical/Specifications/adopted.htm
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*
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* Copyright 2013, Michal Labedzki for Tieto Corporation
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/expert.h>
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#include "packet-btsdp.h"
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static int proto_btmcap = -1;
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static int hf_btmcap_op_code = -1;
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static int hf_btmcap_response_code = -1;
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static int hf_btmcap_mdl_id = -1;
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static int hf_btmcap_mdep_id = -1;
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static int hf_btmcap_response_parameters = -1;
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static int hf_btmcap_configuration = -1;
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static int hf_btmcap_timestamp_required_accuracy = -1;
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static int hf_btmcap_timestamp_update_information = -1;
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static int hf_btmcap_bluetooth_clock_sync_time = -1;
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static int hf_btmcap_timestamp_sync_time = -1;
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static int hf_btmcap_timestamp_sample_accuracy = -1;
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static int hf_btmcap_bluetooth_clock_access_resolution = -1;
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static int hf_btmcap_sync_lead_time = -1;
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static int hf_btmcap_timestamp_native_resolution = -1;
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static int hf_btmcap_timestamp_native_accuracy = -1;
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static int hf_btmcap_data = -1;
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static gint ett_btmcap = -1;
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static expert_field ei_btmcap_mdl_id_ffff = EI_INIT;
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static expert_field ei_btmcap_response_parameters_bad = EI_INIT;
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static expert_field ei_btmcap_unexpected_data = EI_INIT;
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static dissector_handle_t btmcap_handle;
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static const value_string op_code_vals[] = {
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{ 0x00, "ERROR_RSP" },
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{ 0x01, "MD_CREATE_MDL_REQ" },
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{ 0x02, "MD_CREATE_MDL_RSP" },
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{ 0x03, "MD_RECONNECT_MDL_REQ" },
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{ 0x04, "MD_RECONNECT_MDL_RSP" },
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{ 0x05, "MD_ABORT_MDL_REQ" },
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{ 0x06, "MD_ABORT_MDL_RSP" },
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{ 0x07, "MD_DELETE_MDL_REQ" },
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{ 0x08, "MD_DELETE_MDL_RSP" },
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{ 0x11, "MD_SYNC_CAP_REQ" },
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{ 0x12, "MD_SYNC_CAP_RSP" },
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{ 0x13, "MD_SYNC_SET_REQ" },
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{ 0x14, "MD_SYNC_SET_RSP" },
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{ 0x15, "MD_SYNC_INFO_IND" },
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{ 0x16, "Reserved as pseudoresponse" },
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{ 0, NULL }
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};
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static const value_string response_code_vals[] = {
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{ 0x00, "Success" },
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{ 0x01, "Invalid Op Code" },
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{ 0x02, "Invalid Parameter Value" },
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{ 0x03, "Invalid MDEP" },
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{ 0x04, "MDEP Busy" },
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{ 0x05, "Invalid MDL" },
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{ 0x06, "MDL Busy" },
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{ 0x07, "Invalid Operation" },
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{ 0x08, "Resource Unavailable" },
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{ 0x09, "Unspecified Error" },
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{ 0x0A, "Request Not Supported" },
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{ 0x0B, "Configuration Rejected" },
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{ 0, NULL }
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};
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void proto_register_btmcap(void);
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void proto_reg_handoff_btmcap(void);
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static gint
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dissect_btmcap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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proto_item *main_item;
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proto_tree *main_tree;
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proto_item *pitem;
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gint offset = 0;
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guint32 op_code;
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guint32 response_code;
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guint32 mdl_id;
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guint32 mdep_id;
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guint32 bluetooth_clock_sync_time;
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guint64 timestamp_sync_time;
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main_item = proto_tree_add_item(tree, proto_btmcap, tvb, offset, tvb_captured_length(tvb), ENC_NA);
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main_tree = proto_item_add_subtree(main_item, ett_btmcap);
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "MCAP");
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switch (pinfo->p2p_dir) {
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case P2P_DIR_SENT:
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col_set_str(pinfo->cinfo, COL_INFO, "Sent ");
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break;
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case P2P_DIR_RECV:
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col_set_str(pinfo->cinfo, COL_INFO, "Rcvd ");
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break;
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default:
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col_set_str(pinfo->cinfo, COL_INFO, "UnknownDirection ");
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break;
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}
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pitem = proto_tree_add_item(main_tree, hf_btmcap_op_code, tvb, offset, 1, ENC_BIG_ENDIAN);
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op_code = tvb_get_guint8(tvb, offset);
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offset += 1;
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col_append_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(op_code, op_code_vals, "Unknown Op Code"));
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if (op_code >= 0x11 && op_code <= 0x20) {
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proto_item_append_text(pitem, " (Clock Sync)");
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col_append_str(pinfo->cinfo, COL_INFO, " (Clock Sync)");
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} else {
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proto_item_append_text(pitem, " (Standard)");
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col_append_str(pinfo->cinfo, COL_INFO, " (Standard)");
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}
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if (op_code & 0x01) {
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/* isRequest */
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switch(op_code) {
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case 0x01: /* MD_CREATE_MDL_REQ */
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case 0x03: /* MD_RECONNECT_MDL_REQ */
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case 0x05: /* MD_ABORT_MDL_REQ */
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case 0x07: /* MD_DELETE_MDL_REQ */
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pitem = proto_tree_add_item(main_tree, hf_btmcap_mdl_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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mdl_id = tvb_get_ntohs(tvb, offset);
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offset += 2;
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col_append_fstr(pinfo->cinfo, COL_INFO, " - MDL ID: %u", mdl_id);
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if (mdl_id == 0xFFFF) {
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proto_item_append_text(pitem, " (Indicates all MDLs)");
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col_append_fstr(pinfo->cinfo, COL_INFO, " (Indicates all MDLs)");
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} else if (mdl_id >= 0x0001 && mdl_id <= 0xFEFF) {
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proto_item_append_text(pitem, " (Dynamic Range)");
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col_append_fstr(pinfo->cinfo, COL_INFO, " (Dynamic Range)");
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} else if (mdl_id == 0x0000) {
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proto_item_append_text(pitem, " (Reserved)");
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col_append_str(pinfo->cinfo, COL_INFO, " (Reserved)");
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}
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if (op_code != 0x07 && mdl_id == 0xFFFF) {
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expert_add_info(pinfo, pitem, &ei_btmcap_mdl_id_ffff);
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}
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if (op_code == 0x01) {
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/* only MD_CREATE_MDL_REQ */
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pitem = proto_tree_add_item(main_tree, hf_btmcap_mdep_id, tvb, offset, 1, ENC_BIG_ENDIAN);
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mdep_id = tvb_get_guint8(tvb, offset);
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offset += 1;
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if (mdep_id <= 0x7F) {
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proto_item_append_text(pitem, " (Available for use)");
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} else {
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proto_item_append_text(pitem, " (Reserved)");
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}
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proto_tree_add_item(main_tree, hf_btmcap_configuration, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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}
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break;
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case 0x11: /* MD_SYNC_CAP_REQ */
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_required_accuracy, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " ppm");
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offset += 2;
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break;
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case 0x13: /* MD_SYNC_SET_REQ */
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proto_tree_add_item(main_tree, hf_btmcap_timestamp_update_information, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_bluetooth_clock_sync_time, tvb, offset, 4, ENC_BIG_ENDIAN);
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bluetooth_clock_sync_time = tvb_get_ntohl(tvb, offset);
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if (bluetooth_clock_sync_time == 0xFFFFFFFF)
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proto_item_append_text(pitem, " (Instant Synchronization)");
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else
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proto_item_append_text(pitem, " (Baseband Half-Slot Instant)");
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offset += 4;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_sync_time, tvb, offset, 8, ENC_BIG_ENDIAN);
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timestamp_sync_time = tvb_get_ntoh64(tvb, offset);
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if (timestamp_sync_time == G_GUINT64_CONSTANT(0xFFFFFFFFFFFFFFFF))
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proto_item_append_text(pitem, " (No Time Synchronization)");
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else
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proto_item_append_text(pitem, " (Time-Stamp Clock Instant)");
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offset += 8;
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break;
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case 0x15: /* MD_SYNC_INFO_IND */
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pitem = proto_tree_add_item(main_tree, hf_btmcap_bluetooth_clock_sync_time, tvb, offset, 4, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " (Baseband Half-Slot Instant)");
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offset += 4;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_sync_time, tvb, offset, 8, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " (Time-Stamp Clock Instant)");
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offset += 8;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_sample_accuracy, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " us");
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offset += 2;
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break;
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}
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} else {
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/* isResponse */
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proto_tree_add_item(main_tree, hf_btmcap_response_code, tvb, offset, 1, ENC_BIG_ENDIAN);
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response_code = tvb_get_guint8(tvb, offset);
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offset += 1;
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col_append_fstr(pinfo->cinfo, COL_INFO, " - %s", val_to_str(response_code, response_code_vals, "Unknown ResponseCode"));
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if (op_code >= 0x11 && op_code <= 0x20) {
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/* Clock Sync */
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switch(op_code) {
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case 0x12: /* MD_SYNC_CAP_RSP */
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pitem = proto_tree_add_item(main_tree, hf_btmcap_bluetooth_clock_access_resolution, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " (Baseband half-slots)");
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offset += 1;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_sync_lead_time, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " ms");
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offset += 2;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_native_resolution, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " us");
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offset += 2;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_native_accuracy, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " ppm");
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offset += 2;
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break;
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case 0x14: /* MD_SYNC_SET_RSP */
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pitem = proto_tree_add_item(main_tree, hf_btmcap_bluetooth_clock_sync_time, tvb, offset, 4, ENC_BIG_ENDIAN);
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bluetooth_clock_sync_time = tvb_get_ntohl(tvb, offset);
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if (bluetooth_clock_sync_time == 0xFFFFFFFF)
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proto_item_append_text(pitem, " (Instant Synchronization)");
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else
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proto_item_append_text(pitem, " (Baseband Half-Slot Instant)");
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offset += 4;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_sync_time, tvb, offset, 8, ENC_BIG_ENDIAN);
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timestamp_sync_time = tvb_get_ntoh64(tvb, offset);
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if (timestamp_sync_time == G_GUINT64_CONSTANT(0xFFFFFFFFFFFFFFFF))
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proto_item_append_text(pitem, " (No Time Synchronization)");
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else
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proto_item_append_text(pitem, " (Time-Stamp Clock Instant)");
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offset += 8;
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pitem = proto_tree_add_item(main_tree, hf_btmcap_timestamp_sample_accuracy, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_item_append_text(pitem, " us");
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offset += 2;
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break;
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}
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} else {
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/* Standard Op Code */
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pitem = proto_tree_add_item(main_tree, hf_btmcap_mdl_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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mdl_id = tvb_get_ntohs(tvb, offset);
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offset += 2;
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col_append_fstr(pinfo->cinfo, COL_INFO, " - %u", mdl_id);
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if (mdl_id == 0xFFFF) {
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proto_item_append_text(pitem, " (Indicates all MDLs)");
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col_append_str(pinfo->cinfo, COL_INFO, " (Indicates all MDLs)");
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} else if (mdl_id >= 0x0001 && mdl_id <= 0xFEFF) {
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proto_item_append_text(pitem, " (Dynamic Range)");
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col_append_str(pinfo->cinfo, COL_INFO, " (Dynamic Range)");
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} else if (mdl_id == 0x0000) {
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proto_item_append_text(pitem, " (Reserved)");
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col_append_str(pinfo->cinfo, COL_INFO, " (Reserved)");
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}
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if ((op_code == 0x03 || op_code == 0x05 || op_code == 0x07) && tvb_reported_length_remaining(tvb, offset)) {
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expert_add_info_format(pinfo, pitem, &ei_btmcap_response_parameters_bad,
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"The Response Parameters for MD_RECONNECT_MDL_RSP shall have length zero.");
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} else if (tvb_reported_length_remaining(tvb, offset)) {
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pitem = proto_tree_add_item(main_tree, hf_btmcap_response_parameters, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA);
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if (response_code != 0x00) {
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expert_add_info_format(pinfo, pitem, &ei_btmcap_response_parameters_bad,
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"When the Response Code is not Success, the Response Parameters shall have length zero.");
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}
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offset += tvb_reported_length_remaining(tvb, offset);
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}
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}
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}
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if (tvb_reported_length_remaining(tvb, offset)) {
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pitem = proto_tree_add_item(main_tree, hf_btmcap_data, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA);
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expert_add_info(pinfo, pitem, &ei_btmcap_unexpected_data);
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offset = tvb_reported_length(tvb);
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}
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return offset;
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}
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void
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proto_register_btmcap(void)
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{
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module_t *module;
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expert_module_t *expert_btmcap;
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static hf_register_info hf[] = {
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{ &hf_btmcap_op_code,
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{ "Op Code", "btmcap.op_code",
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FT_UINT8, BASE_HEX, VALS(op_code_vals), 0x0,
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NULL, HFILL }
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},
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{ &hf_btmcap_response_code,
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{ "Response Code", "btmcap.response_code",
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FT_UINT8, BASE_HEX, VALS(response_code_vals), 0x0,
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NULL, HFILL }
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},
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{ &hf_btmcap_mdl_id,
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{ "MDL ID", "btmcap.mdl_id",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_btmcap_mdep_id,
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{ "MDEP ID", "btmcap.mdep_id",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_btmcap_configuration,
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{ "Configuration", "btmcap.configuration",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_btmcap_timestamp_required_accuracy,
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{ "Timestamp Required Accuracy", "btmcap.timestamp_required_accuracy",
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FT_UINT16, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_timestamp_update_information,
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{ "Timestamp Update Information", "btmcap.timestamp_update_information",
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FT_UINT8, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_bluetooth_clock_sync_time,
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{ "Bluetooth Clock Sync Time", "btmcap.bluetooth_clock_sync_time",
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FT_UINT32, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_timestamp_sync_time,
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{ "Timestamp Sync Time", "btmcap.timestamp_sync_time",
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FT_UINT64, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_timestamp_sample_accuracy,
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{ "Timestamp Sample Accuracy", "btmcap.timestamp_sample_accuracy",
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FT_UINT16, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_bluetooth_clock_access_resolution,
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{ "Bluetooth Clock Access Resolution","btmcap.bluetooth_clock_access_resolution",
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FT_UINT8, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_sync_lead_time,
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{ "Sync Lead Time", "btmcap.sync_lead_time",
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FT_UINT16, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_timestamp_native_resolution,
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{ "Timestamp Native Resolution", "btmcap.timestamp_native_resolution",
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FT_UINT16, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_btmcap_timestamp_native_accuracy,
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{ "Timestamp Native Accuracy", "btmcap.timestamp_native_accuracy",
|
|
FT_UINT16, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_btmcap_response_parameters,
|
|
{ "Response Parameters", "btmcap.response_parameters",
|
|
FT_BYTES, BASE_NONE, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
{ &hf_btmcap_data,
|
|
{ "Data", "btmcap.data",
|
|
FT_NONE, BASE_NONE, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_btmcap
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_btmcap_mdl_id_ffff, { "btmcap.mdl_id.ffff", PI_PROTOCOL, PI_WARN, "The value 0xFFFF is not a valid MDL ID for this request and shall not be used.", EXPFILL }},
|
|
{ &ei_btmcap_response_parameters_bad, { "btmcap.response_parameters.bad", PI_PROTOCOL, PI_WARN, "Response parameters bad", EXPFILL }},
|
|
{ &ei_btmcap_unexpected_data, { "btmcap.unexpected_data", PI_PROTOCOL, PI_WARN, "Unexpected data", EXPFILL }},
|
|
};
|
|
|
|
proto_btmcap = proto_register_protocol("Bluetooth MCAP Protocol", "BT MCAP", "btmcap");
|
|
btmcap_handle = register_dissector("btmcap", dissect_btmcap, proto_btmcap);
|
|
|
|
proto_register_field_array(proto_btmcap, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_btmcap = expert_register_protocol(proto_btmcap);
|
|
expert_register_field_array(expert_btmcap, ei, array_length(ei));
|
|
|
|
module = prefs_register_protocol(proto_btmcap, NULL);
|
|
prefs_register_static_text_preference(module, "mcap.version",
|
|
"Bluetooth Protocol MCAP version: 1.0",
|
|
"Version of protocol supported by this dissector.");
|
|
}
|
|
|
|
|
|
void
|
|
proto_reg_handoff_btmcap(void)
|
|
{
|
|
dissector_add_string("bluetooth.uuid", "1e", btmcap_handle);
|
|
dissector_add_string("bluetooth.uuid", "1f", btmcap_handle);
|
|
dissector_add_string("bluetooth.uuid", "1400", btmcap_handle);
|
|
dissector_add_string("bluetooth.uuid", "1401", btmcap_handle);
|
|
dissector_add_string("bluetooth.uuid", "1402", btmcap_handle);
|
|
|
|
/* dynamic PSM */
|
|
dissector_add_for_decode_as("btl2cap.psm", btmcap_handle);
|
|
dissector_add_for_decode_as("btl2cap.cid", btmcap_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://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:
|
|
*/
|