/* packet-bthci_acl.c

 * Routines for the Bluetooth ACL dissection

 * Copyright 2002, Christoph Scholz <scholz@cs.uni-bonn.de>

 *     - from: http://affix.sourceforge.net/archive/ethereal_affix-3.patch

 * Copyright 2006, Ronnie Sahlberg

 *     - refactored for Wireshark checkin

 * Copyright 2014, Michal Labedzki for Tieto Corporation

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

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

 */

#include "config.h"

#include <epan/packet.h>

#include <epan/prefs.h>

#include <epan/addr_resolv.h>

#include <epan/expert.h>

#include <epan/proto_data.h>

#include "packet-bluetooth.h"

#include "packet-bthci_acl.h"

/* Initialize the protocol and registered fields */

static int proto_bthci_acl;

static int hf_bthci_acl_chandle;

static int hf_bthci_acl_pb_flag;

static int hf_bthci_acl_bc_flag;

static int hf_bthci_acl_length;

static int hf_bthci_acl_data;

static int hf_bthci_acl_continuation_to;

static int hf_bthci_acl_reassembled_in;

static int hf_bthci_acl_connect_in;

static int hf_bthci_acl_disconnect_in;

static int hf_bthci_acl_src_bd_addr;

static int hf_bthci_acl_src_name;

static int hf_bthci_acl_src_role;

static int hf_bthci_acl_dst_bd_addr;

static int hf_bthci_acl_dst_name;

static int hf_bthci_acl_dst_role;

static int hf_bthci_acl_role_last_change_in_frame;

static int hf_bthci_acl_mode;

static int hf_bthci_acl_mode_last_change_in_frame;

/* Initialize the subtree pointers */

static int ett_bthci_acl;

static expert_field ei_invalid_session;

static expert_field ei_length_bad;

static dissector_handle_t bthci_acl_handle;

static dissector_handle_t btl2cap_handle;

static bool acl_reassembly = true;

typedef struct _multi_fragment_pdu_t {

    uint32_t first_frame;

    uint32_t last_frame;

    uint16_t tot_len;

    char    *reassembled;

    int      cur_off;           /* counter used by reassembly */

} multi_fragment_pdu_t;

typedef struct _chandle_data_t {

    wmem_tree_t *start_fragments;  /* indexed by pinfo->num */

} chandle_data_t;

static wmem_tree_t *chandle_tree;

static const value_string role_vals[] = {

    { 0, "Unknown" },

    { 1, "Central" },

    { 2, "Peripheral" },

    { 0, NULL }

};

static const value_string mode_vals[] = {

    { 0, "Active Mode" },

    { 1, "Hold Mode" },

    { 2, "Sniff Mode" },

    { 3, "Park Mode" },

    {-1, "Unknown" },

    { 0, NULL }

};

static const value_string pb_flag_vals[] = {

    { 0, "First Non-automatically Flushable Packet" },

    { 1, "Continuing Fragment" },

    { 2, "First Automatically Flushable Packet" },

    { 0, NULL }

};

static const value_string bc_flag_vals[] = {

    { 0, "Point-To-Point" },

    { 1, "Active Broadcast" },

    { 2, "Piconet Broadcast" },

    { 0, NULL }

};

static uint32_t invalid_session;

void proto_register_bthci_acl(void);

void proto_reg_handoff_bthci_acl(void);

/* Code to actually dissect the packets */

static int

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

{

    proto_item               *bthci_acl_item;

    proto_tree               *bthci_acl_tree;

    proto_item               *sub_item;

    proto_item               *length_item;

    uint16_t                  flags;

    uint16_t                  length;

    bool                      fragmented;

    int                       offset                = 0;

    uint16_t                  pb_flag, l2cap_length = 0;

    tvbuff_t                 *next_tvb;

    bthci_acl_data_t         *acl_data;

    chandle_data_t           *chandle_data;

    bluetooth_data_t         *bluetooth_data;

    wmem_tree_t              *subtree;

    wmem_tree_key_t           key[6];

    uint32_t                  interface_id;

    uint32_t                  adapter_id;

    uint32_t                  connection_handle;

    uint32_t                  direction;

    uint32_t                  k_bd_addr_oui;

    uint32_t                  k_bd_addr_id;

    uint32_t                  frame_number;

    remote_bdaddr_t          *remote_bdaddr;

    const char               *localhost_name;

    uint8_t                   localhost_bdaddr[6];

    const char               *localhost_ether_addr;

    char                     *localhost_addr_name;

    int                       localhost_length;

    localhost_bdaddr_entry_t *localhost_bdaddr_entry;

    localhost_name_entry_t   *localhost_name_entry;

    static const uint8_t      unknown_bd_addr[6] = {0};

    const uint8_t            *src_bd_addr = &unknown_bd_addr[0];

    const char               *src_name = "";

    const char               *src_addr_name = "";

    const uint8_t            *dst_bd_addr = &unknown_bd_addr[0];

    const char               *dst_name = "";

    const char               *dst_addr_name = "";

    chandle_session_t        *chandle_session;

    uint32_t                  src_role = ROLE_UNKNOWN;

    uint32_t                  dst_role = ROLE_UNKNOWN;

    uint32_t                  role_last_change_in_frame = 0;

    connection_mode_t        *connection_mode;

    int32_t                   mode = -1;

    uint32_t                  mode_last_change_in_frame = 0;

    /* Reject the packet if data is NULL */

    if (data == NULL)

        return 0;

    bluetooth_data = (bluetooth_data_t *) data;

    bthci_acl_item = proto_tree_add_item(tree, proto_bthci_acl, tvb, offset, -1, ENC_NA);

    bthci_acl_tree = proto_item_add_subtree(bthci_acl_item, ett_bthci_acl);

    switch (pinfo->p2p_dir) {

        case P2P_DIR_SENT:

            col_set_str(pinfo->cinfo, COL_INFO, "Sent ");

            break;

        case P2P_DIR_RECV:

            col_set_str(pinfo->cinfo, COL_INFO, "Rcvd ");

            break;

        default:

        col_set_str(pinfo->cinfo, COL_INFO, "UnknownDirection ");

            break;

    }

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

    flags   = tvb_get_letohs(tvb, offset);

    pb_flag = (flags & 0x3000) >> 12;

    proto_tree_add_item(bthci_acl_tree, hf_bthci_acl_chandle, tvb, offset, 2, ENC_LITTLE_ENDIAN);

    proto_tree_add_item(bthci_acl_tree, hf_bthci_acl_pb_flag, tvb, offset, 2, ENC_LITTLE_ENDIAN);

    proto_tree_add_item(bthci_acl_tree, hf_bthci_acl_bc_flag, tvb, offset, 2, ENC_LITTLE_ENDIAN);

    offset += 2;

    interface_id      = bluetooth_data->interface_id;

    adapter_id        = bluetooth_data->adapter_id;

    connection_handle = flags & 0x0fff;

    direction         = pinfo->p2p_dir;

    frame_number      = pinfo->num;

    acl_data = wmem_new(pinfo->pool, bthci_acl_data_t);

    acl_data->interface_id                = interface_id;

    acl_data->adapter_id                  = adapter_id;

    acl_data->adapter_disconnect_in_frame = bluetooth_data->adapter_disconnect_in_frame;

    acl_data->chandle                     = connection_handle;

    acl_data->is_btle                     = false;

    acl_data->is_btle_retransmit          = false;

    key[0].length = 1;

    key[0].key    = &interface_id;

    key[1].length = 1;

    key[1].key    = &adapter_id;

    key[2].length = 1;

    key[2].key    = &connection_handle;

    key[3].length = 0;

    key[3].key    = NULL;

    subtree = (wmem_tree_t *) wmem_tree_lookup32_array(bluetooth_data->chandle_sessions, key);

    chandle_session = (subtree) ? (chandle_session_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

    if (chandle_session &&

            chandle_session->connect_in_frame < pinfo->num &&

            chandle_session->disconnect_in_frame > pinfo->num) {

        acl_data->disconnect_in_frame = &chandle_session->disconnect_in_frame;

    } else {

        acl_data->disconnect_in_frame = &invalid_session;

        chandle_session = NULL;

    }

    acl_data->remote_bd_addr_oui         = 0;

    acl_data->remote_bd_addr_id          = 0;

    subtree = (wmem_tree_t *) wmem_tree_lookup32_array(bluetooth_data->chandle_to_mode, key);

    connection_mode = (subtree) ? (connection_mode_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

    if (connection_mode) {

        mode = connection_mode->mode;

        mode_last_change_in_frame = connection_mode->change_in_frame;

    }

    /* remote bdaddr and name */

    subtree = (wmem_tree_t *) wmem_tree_lookup32_array(bluetooth_data->chandle_to_bdaddr, key);

    remote_bdaddr = (subtree) ? (remote_bdaddr_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

    if (remote_bdaddr) {

        uint32_t        bd_addr_oui;

        uint32_t        bd_addr_id;

        device_name_t  *device_name;

        device_role_t  *device_role;

        const char     *remote_name;

        const char     *remote_ether_addr;

        char           *remote_addr_name;

        int             remote_length;

        bd_addr_oui = remote_bdaddr->bd_addr[0] << 16 | remote_bdaddr->bd_addr[1] << 8 | remote_bdaddr->bd_addr[2];

        bd_addr_id  = remote_bdaddr->bd_addr[3] << 16 | remote_bdaddr->bd_addr[4] << 8 | remote_bdaddr->bd_addr[5];

        acl_data->remote_bd_addr_oui = bd_addr_oui;

        acl_data->remote_bd_addr_id  = bd_addr_id;

        k_bd_addr_oui  = bd_addr_oui;

        k_bd_addr_id   = bd_addr_id;

        key[0].length = 1;

        key[0].key    = &interface_id;

        key[1].length = 1;

        key[1].key    = &adapter_id;

        key[2].length = 1;

        key[2].key    = &k_bd_addr_id;

        key[3].length = 1;

        key[3].key    = &k_bd_addr_oui;

        key[4].length = 0;

        key[4].key    = NULL;

        subtree = (wmem_tree_t *) wmem_tree_lookup32_array(bluetooth_data->bdaddr_to_role, key);

        device_role = (subtree) ? (device_role_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

        if (device_role) {

            if ((pinfo->p2p_dir == P2P_DIR_SENT && device_role->role == ROLE_CENTRAL) ||

                    (pinfo->p2p_dir == P2P_DIR_RECV && device_role->role == ROLE_PERIPHERAL)) {

                src_role = ROLE_PERIPHERAL;

                dst_role = ROLE_CENTRAL;

            } else if ((pinfo->p2p_dir == P2P_DIR_SENT && device_role->role == ROLE_PERIPHERAL) ||

                    (pinfo->p2p_dir == P2P_DIR_RECV && device_role->role == ROLE_CENTRAL)) {

                src_role = ROLE_CENTRAL;

                dst_role = ROLE_PERIPHERAL;

            }

            role_last_change_in_frame = device_role->change_in_frame;

        }

        subtree = (wmem_tree_t *) wmem_tree_lookup32_array(bluetooth_data->bdaddr_to_name, key);

        device_name = (subtree) ? (device_name_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

        if (device_name)

            remote_name = device_name->name;

        else

            remote_name = "";

        remote_ether_addr = get_ether_name(remote_bdaddr->bd_addr);

        remote_length = (int)(strlen(remote_ether_addr) + 3 + strlen(remote_name) + 1);

        remote_addr_name = (char *)wmem_alloc(pinfo->pool, remote_length);

        snprintf(remote_addr_name, remote_length, "%s (%s)", remote_ether_addr, remote_name);

        if (pinfo->p2p_dir == P2P_DIR_RECV) {

            src_bd_addr   = remote_bdaddr->bd_addr;

            src_name      = remote_name;

            src_addr_name = remote_addr_name;

        } else if (pinfo->p2p_dir == P2P_DIR_SENT) {

            dst_bd_addr   = remote_bdaddr->bd_addr;

            dst_name      = remote_name;

            dst_addr_name = remote_addr_name;

        }

    } else {

        if (pinfo->p2p_dir == P2P_DIR_RECV)

            src_addr_name = "remote ()";

        else if (pinfo->p2p_dir == P2P_DIR_SENT)

            dst_addr_name = "remote ()";

    }

    /* localhost bdaddr and name */

    key[0].length = 1;

    key[0].key    = &interface_id;

    key[1].length = 1;

    key[1].key    = &adapter_id;

    key[2].length = 0;

    key[2].key    = NULL;

    subtree = (wmem_tree_t *) wmem_tree_lookup32_array(bluetooth_data->localhost_bdaddr, key);

    localhost_bdaddr_entry = (subtree) ? (localhost_bdaddr_entry_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

    if (localhost_bdaddr_entry) {

        localhost_ether_addr = get_ether_name(localhost_bdaddr_entry->bd_addr);

        memcpy(localhost_bdaddr, localhost_bdaddr_entry->bd_addr, 6);

    } else {

        localhost_ether_addr = "localhost";

        memcpy(localhost_bdaddr, unknown_bd_addr, 6);

    }

    subtree = (wmem_tree_t *) wmem_tree_lookup32_array(bluetooth_data->localhost_name, key);

    localhost_name_entry = (subtree) ? (localhost_name_entry_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

    if (localhost_name_entry)

        localhost_name = localhost_name_entry->name;

    else

        localhost_name = "";

    localhost_length = (int)(strlen(localhost_ether_addr) + 3 + strlen(localhost_name) + 1);

    localhost_addr_name = (char *)wmem_alloc(pinfo->pool, localhost_length);

    snprintf(localhost_addr_name, localhost_length, "%s (%s)", localhost_ether_addr, localhost_name);

    if (pinfo->p2p_dir == P2P_DIR_RECV) {

        dst_bd_addr   = localhost_bdaddr;

        dst_name      = localhost_name;

        dst_addr_name = localhost_addr_name;

    } else if (pinfo->p2p_dir == P2P_DIR_SENT) {

        src_bd_addr   = localhost_bdaddr;

        src_name      = localhost_name;

        src_addr_name = localhost_addr_name;

    }

    /* find the chandle_data structure associated with this chandle */

    key[0].length = 1;

    key[0].key = &interface_id;

    key[1].length = 1;

    key[1].key = &adapter_id;

    key[2].length = 1;

    key[2].key = &connection_handle;

    key[3].length = 1;

    key[3].key = &direction;

    key[4].length = 0;

    key[4].key = NULL;

    subtree = (wmem_tree_t *) wmem_tree_lookup32_array(chandle_tree, key);

    chandle_data = (subtree) ? (chandle_data_t *) wmem_tree_lookup32_le(subtree, pinfo->num) : NULL;

    if (!pinfo->fd->visited && !chandle_data) {

        key[0].length = 1;

        key[0].key = &interface_id;

        key[1].length = 1;

        key[1].key = &adapter_id;

        key[2].length = 1;

        key[2].key = &connection_handle;

        key[3].length = 1;

        key[3].key = &direction;

        key[4].length = 1;

        key[4].key = &frame_number;

        key[5].length = 0;

        key[5].key = NULL;

        chandle_data = wmem_new(wmem_file_scope(), chandle_data_t);

        chandle_data->start_fragments = wmem_tree_new(wmem_file_scope());

        wmem_tree_insert32_array(chandle_tree, key, chandle_data);

    } else if (pinfo->fd->visited && !chandle_data) {

        DISSECTOR_ASSERT_HINT(0, "Impossible: no previously session saved");

    }

    length = tvb_get_letohs(tvb, offset);

    length_item = proto_tree_add_item(bthci_acl_tree, hf_bthci_acl_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);

    offset += 2;

    /* determine if packet is fragmented */

    switch(pb_flag) {

    case 0x01:  /* Continuation fragment */

        fragmented = true;

        break;

    case 0x00:  /* First fragment/packet, non-auto flushable */

    case 0x02:  /* First fragment/packet, auto flushable */

        l2cap_length = tvb_get_letohs(tvb, offset);

        fragmented   = (l2cap_length + 4 != length);

        break;

    default:

        /* unknown pb_flag */

        fragmented = false;

    }

    alloc_address_wmem(pinfo->pool, &pinfo->net_src, AT_STRINGZ, (int)strlen(src_name) + 1, src_name);

    alloc_address_wmem(pinfo->pool, &pinfo->dl_src, AT_ETHER, 6, src_bd_addr);

    alloc_address_wmem(pinfo->pool, &pinfo->src, AT_STRINGZ, (int)strlen(src_addr_name) + 1, src_addr_name);

    alloc_address_wmem(pinfo->pool, &pinfo->net_dst, AT_STRINGZ, (int)strlen(dst_name) + 1, dst_name);

    alloc_address_wmem(pinfo->pool, &pinfo->dl_dst, AT_ETHER, 6, dst_bd_addr);

    alloc_address_wmem(pinfo->pool, &pinfo->dst, AT_STRINGZ, (int)strlen(dst_addr_name) + 1, dst_addr_name);

    if (!fragmented || (!acl_reassembly && !(pb_flag & 0x01))) {

        /* call L2CAP dissector for PDUs that are not fragmented

         * also for the first fragment if reassembly is disabled

         */

        if (length < tvb_captured_length_remaining(tvb, offset)) {

            expert_add_info(pinfo, length_item, &ei_length_bad);

            /* Try to dissect as more as possible */

            length = tvb_captured_length_remaining(tvb, offset);

        }

        next_tvb = tvb_new_subset_length_caplen(tvb, offset, tvb_captured_length_remaining(tvb, offset), length);

        call_dissector_with_data(btl2cap_handle, next_tvb, pinfo, tree, acl_data);

    } else if (fragmented && acl_reassembly) {

        multi_fragment_pdu_t *mfp = NULL;

        int                   len;

        if (!(pb_flag & 0x01)) { /* first fragment */

            if (!pinfo->fd->visited) {

                mfp = (multi_fragment_pdu_t *) wmem_new(wmem_file_scope(), multi_fragment_pdu_t);

                mfp->first_frame = pinfo->num;

                mfp->last_frame  = 0;

                mfp->tot_len     = l2cap_length + 4;

                mfp->reassembled = (char *) wmem_alloc(wmem_file_scope(), mfp->tot_len);

                len = tvb_captured_length_remaining(tvb, offset);

                if (len <= mfp->tot_len) {

                    tvb_memcpy(tvb, (uint8_t *) mfp->reassembled, offset, len);

                    mfp->cur_off = len;

                    wmem_tree_insert32(chandle_data->start_fragments, pinfo->num, mfp);

                }

            } else {

                mfp = (multi_fragment_pdu_t *)wmem_tree_lookup32(chandle_data->start_fragments, pinfo->num);

            }

            if (mfp != NULL && mfp->last_frame) {

                proto_item *item;

                item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_reassembled_in, tvb, 0, 0, mfp->last_frame);

                proto_item_set_generated(item);

                col_append_frame_number(pinfo, COL_INFO, " [Reassembled in #%u]", mfp->last_frame);

            }

        }

        if (pb_flag == 0x01) { /* continuation fragment */

            mfp = (multi_fragment_pdu_t *)wmem_tree_lookup32_le(chandle_data->start_fragments, pinfo->num);

            if (!pinfo->fd->visited) {

                len = tvb_captured_length_remaining(tvb, offset);

                if (mfp != NULL && !mfp->last_frame && (mfp->tot_len >= mfp->cur_off + len)) {

                    tvb_memcpy(tvb, (uint8_t *) mfp->reassembled + mfp->cur_off, offset, len);

                    mfp->cur_off += len;

                    if (mfp->cur_off == mfp->tot_len) {

                        mfp->last_frame = pinfo->num;

                    }

                }

            }

            if (mfp) {

                proto_item *item;

                item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_continuation_to, tvb, 0, 0, mfp->first_frame);

                proto_item_set_generated(item);

                col_append_frame_number(pinfo, COL_INFO, " [Continuation to #%u]", mfp->first_frame);

                if (mfp->last_frame && mfp->last_frame != pinfo->num) {

                    item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_reassembled_in, tvb, 0, 0, mfp->last_frame);

                    proto_item_set_generated(item);

                    col_append_frame_number(pinfo, COL_INFO, " [Reassembled in #%u]", mfp->last_frame);

                }

            }

            if (mfp != NULL && mfp->last_frame == pinfo->num) {

                next_tvb = tvb_new_child_real_data(tvb, (uint8_t *) mfp->reassembled, mfp->tot_len, mfp->tot_len);

                add_new_data_source(pinfo, next_tvb, "Reassembled BTHCI ACL");

                call_dissector_with_data(btl2cap_handle, next_tvb, pinfo, tree, acl_data);

            }

        }

    }

    if (tvb_captured_length_remaining(tvb, offset) > 0) {

        sub_item = proto_tree_add_item(bthci_acl_tree, hf_bthci_acl_data, tvb, offset, -1, ENC_NA);

        if (fragmented) {

            proto_item_append_text(sub_item, " Fragment");

        }

    }

    if (chandle_session) {

        sub_item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_connect_in, tvb, 0, 0, chandle_session->connect_in_frame);

        proto_item_set_generated(sub_item);

        if (chandle_session->disconnect_in_frame < UINT32_MAX) {

            sub_item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_disconnect_in, tvb, 0, 0, chandle_session->disconnect_in_frame);

            proto_item_set_generated(sub_item);

        }

    }

    if (acl_data->disconnect_in_frame == &invalid_session) {

        expert_add_info(pinfo, bthci_acl_item, &ei_invalid_session);

    }

    if (!pinfo->fd->visited) {

        address *addr;

        addr = (address *) wmem_memdup(wmem_file_scope(), &pinfo->dl_src, sizeof(address));

        addr->data =  wmem_memdup(wmem_file_scope(), pinfo->dl_src.data, pinfo->dl_src.len);

        p_add_proto_data(wmem_file_scope(), pinfo, proto_bluetooth, BLUETOOTH_DATA_SRC, addr);

        addr = (address *) wmem_memdup(wmem_file_scope(), &pinfo->dl_dst, sizeof(address));

        addr->data =  wmem_memdup(wmem_file_scope(), pinfo->dl_dst.data, pinfo->dl_dst.len);

        p_add_proto_data(wmem_file_scope(), pinfo, proto_bluetooth, BLUETOOTH_DATA_DST, addr);

    }

    sub_item = proto_tree_add_ether(bthci_acl_tree, hf_bthci_acl_src_bd_addr, tvb, 0, 0, src_bd_addr);

    proto_item_set_generated(sub_item);

    sub_item = proto_tree_add_string(bthci_acl_tree, hf_bthci_acl_src_name, tvb, 0, 0, src_name);

    proto_item_set_generated(sub_item);

    sub_item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_src_role, tvb, 0, 0, src_role);

    proto_item_set_generated(sub_item);

    sub_item = proto_tree_add_ether(bthci_acl_tree, hf_bthci_acl_dst_bd_addr, tvb, 0, 0, dst_bd_addr);

    proto_item_set_generated(sub_item);

    sub_item = proto_tree_add_string(bthci_acl_tree, hf_bthci_acl_dst_name, tvb, 0, 0, dst_name);

    proto_item_set_generated(sub_item);

    sub_item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_dst_role, tvb, 0, 0, dst_role);

    proto_item_set_generated(sub_item);

    if (role_last_change_in_frame > 0) {

        sub_item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_role_last_change_in_frame, tvb, 0, 0, role_last_change_in_frame);

        proto_item_set_generated(sub_item);

    }

    sub_item = proto_tree_add_int(bthci_acl_tree, hf_bthci_acl_mode, tvb, 0, 0, mode);

    proto_item_set_generated(sub_item);

    if (mode_last_change_in_frame > 0) {

        sub_item = proto_tree_add_uint(bthci_acl_tree, hf_bthci_acl_mode_last_change_in_frame, tvb, 0, 0, mode_last_change_in_frame);

        proto_item_set_generated(sub_item);

    }

    return tvb_captured_length(tvb);

}

void

proto_register_bthci_acl(void)

{

    module_t         *bthci_acl_module;

    expert_module_t  *bthci_acl_expert_module;

    /* Setup list of header fields  See Section 1.6.1 for details*/

    static hf_register_info hf[] = {

        { &hf_bthci_acl_chandle,

          { "Connection Handle",                             "bthci_acl.chandle",

            FT_UINT16, BASE_HEX, NULL, 0x0FFF,

            NULL, HFILL }

        },

        { &hf_bthci_acl_pb_flag,

          { "PB Flag",                                       "bthci_acl.pb_flag",

            FT_UINT16, BASE_DEC, VALS(pb_flag_vals), 0x3000,

            "Packet Boundary Flag", HFILL }

        },

        { &hf_bthci_acl_bc_flag,

          { "BC Flag",                                       "bthci_acl.bc_flag",

            FT_UINT16, BASE_DEC, VALS(bc_flag_vals), 0xC000,

            "Broadcast Flag", HFILL }

        },

        { &hf_bthci_acl_length,

          { "Data Total Length",                             "bthci_acl.length",

            FT_UINT16, BASE_DEC, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_data,

          { "Data",                                          "bthci_acl.data",

            FT_NONE, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_continuation_to,

          { "This is a continuation to the PDU in frame",    "bthci_acl.continuation_to",

            FT_FRAMENUM, BASE_NONE, NULL, 0x0,

            "This is a continuation to the PDU in frame #", HFILL }

        },

        { &hf_bthci_acl_reassembled_in,

          { "This PDU is reassembled in frame",              "bthci_acl.reassembled_in",

            FT_FRAMENUM, BASE_NONE, NULL, 0x0,

            "This PDU is reassembled in frame #", HFILL }

        },

        { &hf_bthci_acl_connect_in,

            { "Connect in frame",                            "bthci_acl.connect_in",

            FT_FRAMENUM, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_disconnect_in,

            { "Disconnect in frame",                         "bthci_acl.disconnect_in",

            FT_FRAMENUM, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_src_bd_addr,

            { "Source BD_ADDR",                              "bthci_acl.src.bd_addr",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_src_name,

            { "Source Device Name",                          "bthci_acl.src.name",

            FT_STRINGZ, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_src_role,

            { "Source Role",                                "bthci_acl.src.role",

            FT_UINT32, BASE_DEC, VALS(role_vals), 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_dst_bd_addr,

            { "Destination BD_ADDR",                         "bthci_acl.dst.bd_addr",

            FT_ETHER, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_dst_name,

            { "Destination Device Name",                     "bthci_acl.dst.name",

            FT_STRINGZ, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_dst_role,

            { "Destination Role",                            "bthci_acl.dst.role",

            FT_UINT32, BASE_DEC, VALS(role_vals), 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_role_last_change_in_frame,

            { "Last Role Change in Frame",                   "bthci_acl.last_change_in_frame.role",

            FT_FRAMENUM, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_mode,

            { "Current Mode",                                "bthci_acl.mode",

            FT_INT32, BASE_DEC, VALS(mode_vals), 0x0,

            NULL, HFILL }

        },

        { &hf_bthci_acl_mode_last_change_in_frame,

            { "Last Mode Change in Frame",                   "bthci_acl.last_change_in_frame.mode",

            FT_FRAMENUM, BASE_NONE, NULL, 0x0,

            NULL, HFILL }

        },

    };

    /* Setup protocol subtree array */

    static int *ett[] = {

        &ett_bthci_acl,

    };

    static ei_register_info ei[] = {

        { &ei_invalid_session, { "bthci_acl.invalid_session", PI_PROTOCOL,  PI_ERROR, "Frame is out of any \"connection handle\" session", EXPFILL }},

        { &ei_length_bad,      { "bthci_acl.length.bad",      PI_MALFORMED, PI_WARN, "Length too short", EXPFILL }},

    };

    /* Register the protocol name and description */

    proto_bthci_acl = proto_register_protocol("Bluetooth HCI ACL Packet", "HCI_ACL", "bthci_acl");

    bthci_acl_handle = register_dissector("bthci_acl", dissect_bthci_acl, proto_bthci_acl);

    /* Required function calls to register the header fields and subtrees used */

    proto_register_field_array(proto_bthci_acl, hf, array_length(hf));

    proto_register_subtree_array(ett, array_length(ett));

    bthci_acl_expert_module = expert_register_protocol(proto_bthci_acl);

    expert_register_field_array(bthci_acl_expert_module, ei, array_length(ei));

    /* Register configuration preferences */

    bthci_acl_module = prefs_register_protocol_subtree("Bluetooth", proto_bthci_acl, NULL);

    prefs_register_bool_preference(bthci_acl_module, "hci_acl_reassembly",

        "Reassemble ACL Fragments",

        "Whether the ACL dissector should reassemble fragmented PDUs",

        &acl_reassembly);

    chandle_tree = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());

}

void

proto_reg_handoff_bthci_acl(void)

{

    dissector_add_uint("hci_h4.type", HCI_H4_TYPE_ACL, bthci_acl_handle);

    dissector_add_uint("hci_h1.type", BTHCI_CHANNEL_ACL, bthci_acl_handle);

    btl2cap_handle = find_dissector_add_dependency("btl2cap", proto_bthci_acl);

}

/*

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

 *

 * Local variables:

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 * End:

 *

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

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

 */