/*
     BlueZ - Bluetooth protocol stack for Linux

     Copyright (C) 2010  Nokia Corporation

     Copyright (C) 2011-2012 Intel Corporation

  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License version 2 as
     published by the Free Software Foundation;
  
     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
     IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
     CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
     WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  
     ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
     COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
     SOFTWARE IS DISCLAIMED.
  */
  
  /* Bluetooth HCI Management interface */

  #include <linux/module.h>

  #include <asm/unaligned.h>
  
  #include <net/bluetooth/bluetooth.h>
  #include <net/bluetooth/hci_core.h>

  #include <net/bluetooth/hci_sock.h>

  #include <net/bluetooth/l2cap.h>

  #include <net/bluetooth/mgmt.h>

  #include "hci_request.h"

  #include "smp.h"

  #include "mgmt_util.h"

  #include "mgmt_config.h"

  #include "msft.h"

  #define MGMT_VERSION	1

  #define MGMT_REVISION	18

  static const u16 mgmt_commands[] = {
  	MGMT_OP_READ_INDEX_LIST,
  	MGMT_OP_READ_INFO,
  	MGMT_OP_SET_POWERED,
  	MGMT_OP_SET_DISCOVERABLE,
  	MGMT_OP_SET_CONNECTABLE,
  	MGMT_OP_SET_FAST_CONNECTABLE,

  	MGMT_OP_SET_BONDABLE,

  	MGMT_OP_SET_LINK_SECURITY,
  	MGMT_OP_SET_SSP,
  	MGMT_OP_SET_HS,
  	MGMT_OP_SET_LE,
  	MGMT_OP_SET_DEV_CLASS,
  	MGMT_OP_SET_LOCAL_NAME,
  	MGMT_OP_ADD_UUID,
  	MGMT_OP_REMOVE_UUID,
  	MGMT_OP_LOAD_LINK_KEYS,
  	MGMT_OP_LOAD_LONG_TERM_KEYS,
  	MGMT_OP_DISCONNECT,
  	MGMT_OP_GET_CONNECTIONS,
  	MGMT_OP_PIN_CODE_REPLY,
  	MGMT_OP_PIN_CODE_NEG_REPLY,
  	MGMT_OP_SET_IO_CAPABILITY,
  	MGMT_OP_PAIR_DEVICE,
  	MGMT_OP_CANCEL_PAIR_DEVICE,
  	MGMT_OP_UNPAIR_DEVICE,
  	MGMT_OP_USER_CONFIRM_REPLY,
  	MGMT_OP_USER_CONFIRM_NEG_REPLY,
  	MGMT_OP_USER_PASSKEY_REPLY,
  	MGMT_OP_USER_PASSKEY_NEG_REPLY,
  	MGMT_OP_READ_LOCAL_OOB_DATA,
  	MGMT_OP_ADD_REMOTE_OOB_DATA,
  	MGMT_OP_REMOVE_REMOTE_OOB_DATA,
  	MGMT_OP_START_DISCOVERY,
  	MGMT_OP_STOP_DISCOVERY,
  	MGMT_OP_CONFIRM_NAME,
  	MGMT_OP_BLOCK_DEVICE,
  	MGMT_OP_UNBLOCK_DEVICE,

  	MGMT_OP_SET_DEVICE_ID,

  	MGMT_OP_SET_ADVERTISING,

  	MGMT_OP_SET_BREDR,

  	MGMT_OP_SET_STATIC_ADDRESS,

  	MGMT_OP_SET_SCAN_PARAMS,

  	MGMT_OP_SET_SECURE_CONN,

  	MGMT_OP_SET_DEBUG_KEYS,

  	MGMT_OP_SET_PRIVACY,

  	MGMT_OP_LOAD_IRKS,

  	MGMT_OP_GET_CONN_INFO,

  	MGMT_OP_GET_CLOCK_INFO,

  	MGMT_OP_ADD_DEVICE,
  	MGMT_OP_REMOVE_DEVICE,

  	MGMT_OP_LOAD_CONN_PARAM,

  	MGMT_OP_READ_UNCONF_INDEX_LIST,

  	MGMT_OP_READ_CONFIG_INFO,

  	MGMT_OP_SET_EXTERNAL_CONFIG,

  	MGMT_OP_SET_PUBLIC_ADDRESS,

  	MGMT_OP_START_SERVICE_DISCOVERY,

  	MGMT_OP_READ_LOCAL_OOB_EXT_DATA,

  	MGMT_OP_READ_EXT_INDEX_LIST,

  	MGMT_OP_READ_ADV_FEATURES,

  	MGMT_OP_ADD_ADVERTISING,

  	MGMT_OP_REMOVE_ADVERTISING,

  	MGMT_OP_GET_ADV_SIZE_INFO,

  	MGMT_OP_START_LIMITED_DISCOVERY,

  	MGMT_OP_READ_EXT_INFO,

  	MGMT_OP_SET_APPEARANCE,

  	MGMT_OP_SET_BLOCKED_KEYS,

  	MGMT_OP_SET_WIDEBAND_SPEECH,

  	MGMT_OP_READ_SECURITY_INFO,

  	MGMT_OP_READ_EXP_FEATURES_INFO,
  	MGMT_OP_SET_EXP_FEATURE,

  	MGMT_OP_READ_DEF_SYSTEM_CONFIG,
  	MGMT_OP_SET_DEF_SYSTEM_CONFIG,

  	MGMT_OP_READ_DEF_RUNTIME_CONFIG,
  	MGMT_OP_SET_DEF_RUNTIME_CONFIG,

  	MGMT_OP_GET_DEVICE_FLAGS,
  	MGMT_OP_SET_DEVICE_FLAGS,

  	MGMT_OP_READ_ADV_MONITOR_FEATURES,

  	MGMT_OP_ADD_ADV_PATTERNS_MONITOR,

  	MGMT_OP_REMOVE_ADV_MONITOR,

  };
  
  static const u16 mgmt_events[] = {
  	MGMT_EV_CONTROLLER_ERROR,
  	MGMT_EV_INDEX_ADDED,
  	MGMT_EV_INDEX_REMOVED,
  	MGMT_EV_NEW_SETTINGS,
  	MGMT_EV_CLASS_OF_DEV_CHANGED,
  	MGMT_EV_LOCAL_NAME_CHANGED,
  	MGMT_EV_NEW_LINK_KEY,
  	MGMT_EV_NEW_LONG_TERM_KEY,
  	MGMT_EV_DEVICE_CONNECTED,
  	MGMT_EV_DEVICE_DISCONNECTED,
  	MGMT_EV_CONNECT_FAILED,
  	MGMT_EV_PIN_CODE_REQUEST,
  	MGMT_EV_USER_CONFIRM_REQUEST,
  	MGMT_EV_USER_PASSKEY_REQUEST,
  	MGMT_EV_AUTH_FAILED,
  	MGMT_EV_DEVICE_FOUND,
  	MGMT_EV_DISCOVERING,
  	MGMT_EV_DEVICE_BLOCKED,
  	MGMT_EV_DEVICE_UNBLOCKED,
  	MGMT_EV_DEVICE_UNPAIRED,

  	MGMT_EV_PASSKEY_NOTIFY,

  	MGMT_EV_NEW_IRK,

  	MGMT_EV_NEW_CSRK,

  	MGMT_EV_DEVICE_ADDED,
  	MGMT_EV_DEVICE_REMOVED,

  	MGMT_EV_NEW_CONN_PARAM,

  	MGMT_EV_UNCONF_INDEX_ADDED,

  	MGMT_EV_UNCONF_INDEX_REMOVED,

  	MGMT_EV_NEW_CONFIG_OPTIONS,

  	MGMT_EV_EXT_INDEX_ADDED,
  	MGMT_EV_EXT_INDEX_REMOVED,

  	MGMT_EV_LOCAL_OOB_DATA_UPDATED,

  	MGMT_EV_ADVERTISING_ADDED,
  	MGMT_EV_ADVERTISING_REMOVED,

  	MGMT_EV_EXT_INFO_CHANGED,

  	MGMT_EV_PHY_CONFIGURATION_CHANGED,

  	MGMT_EV_EXP_FEATURE_CHANGED,

  	MGMT_EV_DEVICE_FLAGS_CHANGED,

  	MGMT_EV_CONTROLLER_SUSPEND,
  	MGMT_EV_CONTROLLER_RESUME,

  };

  static const u16 mgmt_untrusted_commands[] = {
  	MGMT_OP_READ_INDEX_LIST,
  	MGMT_OP_READ_INFO,
  	MGMT_OP_READ_UNCONF_INDEX_LIST,
  	MGMT_OP_READ_CONFIG_INFO,
  	MGMT_OP_READ_EXT_INDEX_LIST,

  	MGMT_OP_READ_EXT_INFO,

  	MGMT_OP_READ_SECURITY_INFO,

  	MGMT_OP_READ_EXP_FEATURES_INFO,

  	MGMT_OP_READ_DEF_SYSTEM_CONFIG,

  	MGMT_OP_READ_DEF_RUNTIME_CONFIG,

  };
  
  static const u16 mgmt_untrusted_events[] = {
  	MGMT_EV_INDEX_ADDED,
  	MGMT_EV_INDEX_REMOVED,
  	MGMT_EV_NEW_SETTINGS,
  	MGMT_EV_CLASS_OF_DEV_CHANGED,
  	MGMT_EV_LOCAL_NAME_CHANGED,
  	MGMT_EV_UNCONF_INDEX_ADDED,
  	MGMT_EV_UNCONF_INDEX_REMOVED,
  	MGMT_EV_NEW_CONFIG_OPTIONS,
  	MGMT_EV_EXT_INDEX_ADDED,
  	MGMT_EV_EXT_INDEX_REMOVED,

  	MGMT_EV_EXT_INFO_CHANGED,

  	MGMT_EV_EXP_FEATURE_CHANGED,

  	MGMT_EV_ADV_MONITOR_ADDED,

  	MGMT_EV_ADV_MONITOR_REMOVED,

  };

  #define CACHE_TIMEOUT	msecs_to_jiffies(2 * 1000)

  #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
  		 "\x00\x00\x00\x00\x00\x00\x00\x00"

  /* HCI to MGMT error code conversion table */

  static const u8 mgmt_status_table[] = {

  	MGMT_STATUS_SUCCESS,
  	MGMT_STATUS_UNKNOWN_COMMAND,	/* Unknown Command */
  	MGMT_STATUS_NOT_CONNECTED,	/* No Connection */
  	MGMT_STATUS_FAILED,		/* Hardware Failure */
  	MGMT_STATUS_CONNECT_FAILED,	/* Page Timeout */
  	MGMT_STATUS_AUTH_FAILED,	/* Authentication Failed */

  	MGMT_STATUS_AUTH_FAILED,	/* PIN or Key Missing */

  	MGMT_STATUS_NO_RESOURCES,	/* Memory Full */
  	MGMT_STATUS_TIMEOUT,		/* Connection Timeout */
  	MGMT_STATUS_NO_RESOURCES,	/* Max Number of Connections */
  	MGMT_STATUS_NO_RESOURCES,	/* Max Number of SCO Connections */
  	MGMT_STATUS_ALREADY_CONNECTED,	/* ACL Connection Exists */
  	MGMT_STATUS_BUSY,		/* Command Disallowed */
  	MGMT_STATUS_NO_RESOURCES,	/* Rejected Limited Resources */
  	MGMT_STATUS_REJECTED,		/* Rejected Security */
  	MGMT_STATUS_REJECTED,		/* Rejected Personal */
  	MGMT_STATUS_TIMEOUT,		/* Host Timeout */
  	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported Feature */
  	MGMT_STATUS_INVALID_PARAMS,	/* Invalid Parameters */
  	MGMT_STATUS_DISCONNECTED,	/* OE User Ended Connection */
  	MGMT_STATUS_NO_RESOURCES,	/* OE Low Resources */
  	MGMT_STATUS_DISCONNECTED,	/* OE Power Off */
  	MGMT_STATUS_DISCONNECTED,	/* Connection Terminated */
  	MGMT_STATUS_BUSY,		/* Repeated Attempts */
  	MGMT_STATUS_REJECTED,		/* Pairing Not Allowed */
  	MGMT_STATUS_FAILED,		/* Unknown LMP PDU */
  	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported Remote Feature */
  	MGMT_STATUS_REJECTED,		/* SCO Offset Rejected */
  	MGMT_STATUS_REJECTED,		/* SCO Interval Rejected */
  	MGMT_STATUS_REJECTED,		/* Air Mode Rejected */
  	MGMT_STATUS_INVALID_PARAMS,	/* Invalid LMP Parameters */
  	MGMT_STATUS_FAILED,		/* Unspecified Error */
  	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported LMP Parameter Value */
  	MGMT_STATUS_FAILED,		/* Role Change Not Allowed */
  	MGMT_STATUS_TIMEOUT,		/* LMP Response Timeout */
  	MGMT_STATUS_FAILED,		/* LMP Error Transaction Collision */
  	MGMT_STATUS_FAILED,		/* LMP PDU Not Allowed */
  	MGMT_STATUS_REJECTED,		/* Encryption Mode Not Accepted */
  	MGMT_STATUS_FAILED,		/* Unit Link Key Used */
  	MGMT_STATUS_NOT_SUPPORTED,	/* QoS Not Supported */
  	MGMT_STATUS_TIMEOUT,		/* Instant Passed */
  	MGMT_STATUS_NOT_SUPPORTED,	/* Pairing Not Supported */
  	MGMT_STATUS_FAILED,		/* Transaction Collision */
  	MGMT_STATUS_INVALID_PARAMS,	/* Unacceptable Parameter */
  	MGMT_STATUS_REJECTED,		/* QoS Rejected */
  	MGMT_STATUS_NOT_SUPPORTED,	/* Classification Not Supported */
  	MGMT_STATUS_REJECTED,		/* Insufficient Security */
  	MGMT_STATUS_INVALID_PARAMS,	/* Parameter Out Of Range */
  	MGMT_STATUS_BUSY,		/* Role Switch Pending */
  	MGMT_STATUS_FAILED,		/* Slot Violation */
  	MGMT_STATUS_FAILED,		/* Role Switch Failed */
  	MGMT_STATUS_INVALID_PARAMS,	/* EIR Too Large */
  	MGMT_STATUS_NOT_SUPPORTED,	/* Simple Pairing Not Supported */
  	MGMT_STATUS_BUSY,		/* Host Busy Pairing */
  	MGMT_STATUS_REJECTED,		/* Rejected, No Suitable Channel */
  	MGMT_STATUS_BUSY,		/* Controller Busy */
  	MGMT_STATUS_INVALID_PARAMS,	/* Unsuitable Connection Interval */
  	MGMT_STATUS_TIMEOUT,		/* Directed Advertising Timeout */
  	MGMT_STATUS_AUTH_FAILED,	/* Terminated Due to MIC Failure */
  	MGMT_STATUS_CONNECT_FAILED,	/* Connection Establishment Failed */
  	MGMT_STATUS_CONNECT_FAILED,	/* MAC Connection Failed */
  };
  
  static u8 mgmt_status(u8 hci_status)
  {
  	if (hci_status < ARRAY_SIZE(mgmt_status_table))
  		return mgmt_status_table[hci_status];
  
  	return MGMT_STATUS_FAILED;
  }

  static int mgmt_index_event(u16 event, struct hci_dev *hdev, void *data,
  			    u16 len, int flag)

  {

  	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
  			       flag, NULL);

  }

  static int mgmt_limited_event(u16 event, struct hci_dev *hdev, void *data,
  			      u16 len, int flag, struct sock *skip_sk)
  {
  	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
  			       flag, skip_sk);
  }

  static int mgmt_event(u16 event, struct hci_dev *hdev, void *data, u16 len,
  		      struct sock *skip_sk)
  {
  	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,

  			       HCI_SOCK_TRUSTED, skip_sk);

  }

  static u8 le_addr_type(u8 mgmt_addr_type)
  {
  	if (mgmt_addr_type == BDADDR_LE_PUBLIC)
  		return ADDR_LE_DEV_PUBLIC;
  	else
  		return ADDR_LE_DEV_RANDOM;
  }

  void mgmt_fill_version_info(void *ver)
  {
  	struct mgmt_rp_read_version *rp = ver;
  
  	rp->version = MGMT_VERSION;
  	rp->revision = cpu_to_le16(MGMT_REVISION);
  }

  static int read_version(struct sock *sk, struct hci_dev *hdev, void *data,
  			u16 data_len)

  {
  	struct mgmt_rp_read_version rp;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	mgmt_fill_version_info(&rp);

  	return mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_VERSION, 0,
  				 &rp, sizeof(rp));

  }

  static int read_commands(struct sock *sk, struct hci_dev *hdev, void *data,
  			 u16 data_len)

  {
  	struct mgmt_rp_read_commands *rp;

  	u16 num_commands, num_events;

  	size_t rp_size;
  	int i, err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	if (hci_sock_test_flag(sk, HCI_SOCK_TRUSTED)) {
  		num_commands = ARRAY_SIZE(mgmt_commands);
  		num_events = ARRAY_SIZE(mgmt_events);
  	} else {
  		num_commands = ARRAY_SIZE(mgmt_untrusted_commands);
  		num_events = ARRAY_SIZE(mgmt_untrusted_events);
  	}

  	rp_size = sizeof(*rp) + ((num_commands + num_events) * sizeof(u16));
  
  	rp = kmalloc(rp_size, GFP_KERNEL);
  	if (!rp)
  		return -ENOMEM;

  	rp->num_commands = cpu_to_le16(num_commands);
  	rp->num_events = cpu_to_le16(num_events);

  	if (hci_sock_test_flag(sk, HCI_SOCK_TRUSTED)) {
  		__le16 *opcode = rp->opcodes;
  
  		for (i = 0; i < num_commands; i++, opcode++)
  			put_unaligned_le16(mgmt_commands[i], opcode);

  		for (i = 0; i < num_events; i++, opcode++)
  			put_unaligned_le16(mgmt_events[i], opcode);
  	} else {
  		__le16 *opcode = rp->opcodes;
  
  		for (i = 0; i < num_commands; i++, opcode++)
  			put_unaligned_le16(mgmt_untrusted_commands[i], opcode);
  
  		for (i = 0; i < num_events; i++, opcode++)
  			put_unaligned_le16(mgmt_untrusted_events[i], opcode);
  	}

  	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_COMMANDS, 0,
  				rp, rp_size);

  	kfree(rp);
  
  	return err;
  }

  static int read_index_list(struct sock *sk, struct hci_dev *hdev, void *data,
  			   u16 data_len)

  {

  	struct mgmt_rp_read_index_list *rp;

  	struct hci_dev *d;

  	size_t rp_len;

  	u16 count;

  	int err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  
  	read_lock(&hci_dev_list_lock);
  
  	count = 0;

  	list_for_each_entry(d, &hci_dev_list, list) {

  		if (d->dev_type == HCI_PRIMARY &&

  		    !hci_dev_test_flag(d, HCI_UNCONFIGURED))

  			count++;

  	}

  	rp_len = sizeof(*rp) + (2 * count);
  	rp = kmalloc(rp_len, GFP_ATOMIC);
  	if (!rp) {

  		read_unlock(&hci_dev_list_lock);

  		return -ENOMEM;

  	}

  	count = 0;

  	list_for_each_entry(d, &hci_dev_list, list) {

  		if (hci_dev_test_flag(d, HCI_SETUP) ||
  		    hci_dev_test_flag(d, HCI_CONFIG) ||
  		    hci_dev_test_flag(d, HCI_USER_CHANNEL))

  			continue;

  		/* Devices marked as raw-only are neither configured
  		 * nor unconfigured controllers.
  		 */
  		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))

  			continue;

  		if (d->dev_type == HCI_PRIMARY &&

  		    !hci_dev_test_flag(d, HCI_UNCONFIGURED)) {

  			rp->index[count++] = cpu_to_le16(d->id);

  			bt_dev_dbg(hdev, "Added hci%u", d->id);

  		}

  	}

  	rp->num_controllers = cpu_to_le16(count);
  	rp_len = sizeof(*rp) + (2 * count);

  	read_unlock(&hci_dev_list_lock);

  	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_INDEX_LIST,
  				0, rp, rp_len);

  	kfree(rp);
  
  	return err;

  }

  static int read_unconf_index_list(struct sock *sk, struct hci_dev *hdev,
  				  void *data, u16 data_len)
  {
  	struct mgmt_rp_read_unconf_index_list *rp;
  	struct hci_dev *d;
  	size_t rp_len;
  	u16 count;
  	int err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  
  	read_lock(&hci_dev_list_lock);
  
  	count = 0;
  	list_for_each_entry(d, &hci_dev_list, list) {

  		if (d->dev_type == HCI_PRIMARY &&

  		    hci_dev_test_flag(d, HCI_UNCONFIGURED))

  			count++;
  	}
  
  	rp_len = sizeof(*rp) + (2 * count);
  	rp = kmalloc(rp_len, GFP_ATOMIC);
  	if (!rp) {
  		read_unlock(&hci_dev_list_lock);
  		return -ENOMEM;
  	}
  
  	count = 0;
  	list_for_each_entry(d, &hci_dev_list, list) {

  		if (hci_dev_test_flag(d, HCI_SETUP) ||
  		    hci_dev_test_flag(d, HCI_CONFIG) ||
  		    hci_dev_test_flag(d, HCI_USER_CHANNEL))

  			continue;
  
  		/* Devices marked as raw-only are neither configured
  		 * nor unconfigured controllers.
  		 */
  		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
  			continue;

  		if (d->dev_type == HCI_PRIMARY &&

  		    hci_dev_test_flag(d, HCI_UNCONFIGURED)) {

  			rp->index[count++] = cpu_to_le16(d->id);

  			bt_dev_dbg(hdev, "Added hci%u", d->id);

  		}
  	}
  
  	rp->num_controllers = cpu_to_le16(count);
  	rp_len = sizeof(*rp) + (2 * count);
  
  	read_unlock(&hci_dev_list_lock);

  	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
  				MGMT_OP_READ_UNCONF_INDEX_LIST, 0, rp, rp_len);

  
  	kfree(rp);
  
  	return err;
  }

  static int read_ext_index_list(struct sock *sk, struct hci_dev *hdev,
  			       void *data, u16 data_len)
  {
  	struct mgmt_rp_read_ext_index_list *rp;
  	struct hci_dev *d;

  	u16 count;
  	int err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  
  	read_lock(&hci_dev_list_lock);
  
  	count = 0;
  	list_for_each_entry(d, &hci_dev_list, list) {

  		if (d->dev_type == HCI_PRIMARY || d->dev_type == HCI_AMP)

  			count++;
  	}

  	rp = kmalloc(struct_size(rp, entry, count), GFP_ATOMIC);

  	if (!rp) {
  		read_unlock(&hci_dev_list_lock);
  		return -ENOMEM;
  	}
  
  	count = 0;
  	list_for_each_entry(d, &hci_dev_list, list) {
  		if (hci_dev_test_flag(d, HCI_SETUP) ||
  		    hci_dev_test_flag(d, HCI_CONFIG) ||
  		    hci_dev_test_flag(d, HCI_USER_CHANNEL))
  			continue;
  
  		/* Devices marked as raw-only are neither configured
  		 * nor unconfigured controllers.
  		 */
  		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
  			continue;

  		if (d->dev_type == HCI_PRIMARY) {

  			if (hci_dev_test_flag(d, HCI_UNCONFIGURED))
  				rp->entry[count].type = 0x01;
  			else
  				rp->entry[count].type = 0x00;
  		} else if (d->dev_type == HCI_AMP) {
  			rp->entry[count].type = 0x02;
  		} else {
  			continue;
  		}
  
  		rp->entry[count].bus = d->bus;
  		rp->entry[count++].index = cpu_to_le16(d->id);

  		bt_dev_dbg(hdev, "Added hci%u", d->id);

  	}
  
  	rp->num_controllers = cpu_to_le16(count);

  
  	read_unlock(&hci_dev_list_lock);
  
  	/* If this command is called at least once, then all the
  	 * default index and unconfigured index events are disabled
  	 * and from now on only extended index events are used.
  	 */
  	hci_sock_set_flag(sk, HCI_MGMT_EXT_INDEX_EVENTS);
  	hci_sock_clear_flag(sk, HCI_MGMT_INDEX_EVENTS);
  	hci_sock_clear_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
  
  	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,

  				MGMT_OP_READ_EXT_INDEX_LIST, 0, rp,
  				struct_size(rp, entry, count));

  
  	kfree(rp);
  
  	return err;
  }

  static bool is_configured(struct hci_dev *hdev)
  {
  	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) &&

  	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))

  		return false;

  	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
  	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&

  	    !bacmp(&hdev->public_addr, BDADDR_ANY))
  		return false;
  
  	return true;
  }

  static __le32 get_missing_options(struct hci_dev *hdev)
  {
  	u32 options = 0;

  	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) &&

  	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))

  		options |= MGMT_OPTION_EXTERNAL_CONFIG;

  	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
  	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&

  	    !bacmp(&hdev->public_addr, BDADDR_ANY))
  		options |= MGMT_OPTION_PUBLIC_ADDRESS;
  
  	return cpu_to_le32(options);
  }

  static int new_options(struct hci_dev *hdev, struct sock *skip)
  {
  	__le32 options = get_missing_options(hdev);

  	return mgmt_limited_event(MGMT_EV_NEW_CONFIG_OPTIONS, hdev, &options,
  				  sizeof(options), HCI_MGMT_OPTION_EVENTS, skip);

  }

  static int send_options_rsp(struct sock *sk, u16 opcode, struct hci_dev *hdev)
  {
  	__le32 options = get_missing_options(hdev);

  	return mgmt_cmd_complete(sk, hdev->id, opcode, 0, &options,
  				 sizeof(options));

  }

  static int read_config_info(struct sock *sk, struct hci_dev *hdev,
  			    void *data, u16 data_len)
  {
  	struct mgmt_rp_read_config_info rp;

  	u32 options = 0;

  	bt_dev_dbg(hdev, "sock %p", sk);

  
  	hci_dev_lock(hdev);
  
  	memset(&rp, 0, sizeof(rp));
  	rp.manufacturer = cpu_to_le16(hdev->manufacturer);

  	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks))
  		options |= MGMT_OPTION_EXTERNAL_CONFIG;

  	if (hdev->set_bdaddr)

  		options |= MGMT_OPTION_PUBLIC_ADDRESS;
  
  	rp.supported_options = cpu_to_le32(options);
  	rp.missing_options = get_missing_options(hdev);

  
  	hci_dev_unlock(hdev);

  	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_CONFIG_INFO, 0,
  				 &rp, sizeof(rp));

  }

  static u32 get_supported_phys(struct hci_dev *hdev)
  {
  	u32 supported_phys = 0;
  
  	if (lmp_bredr_capable(hdev)) {
  		supported_phys |= MGMT_PHY_BR_1M_1SLOT;
  
  		if (hdev->features[0][0] & LMP_3SLOT)
  			supported_phys |= MGMT_PHY_BR_1M_3SLOT;
  
  		if (hdev->features[0][0] & LMP_5SLOT)
  			supported_phys |= MGMT_PHY_BR_1M_5SLOT;
  
  		if (lmp_edr_2m_capable(hdev)) {
  			supported_phys |= MGMT_PHY_EDR_2M_1SLOT;
  
  			if (lmp_edr_3slot_capable(hdev))
  				supported_phys |= MGMT_PHY_EDR_2M_3SLOT;
  
  			if (lmp_edr_5slot_capable(hdev))
  				supported_phys |= MGMT_PHY_EDR_2M_5SLOT;
  
  			if (lmp_edr_3m_capable(hdev)) {
  				supported_phys |= MGMT_PHY_EDR_3M_1SLOT;
  
  				if (lmp_edr_3slot_capable(hdev))
  					supported_phys |= MGMT_PHY_EDR_3M_3SLOT;
  
  				if (lmp_edr_5slot_capable(hdev))
  					supported_phys |= MGMT_PHY_EDR_3M_5SLOT;
  			}
  		}
  	}
  
  	if (lmp_le_capable(hdev)) {
  		supported_phys |= MGMT_PHY_LE_1M_TX;
  		supported_phys |= MGMT_PHY_LE_1M_RX;
  
  		if (hdev->le_features[1] & HCI_LE_PHY_2M) {
  			supported_phys |= MGMT_PHY_LE_2M_TX;
  			supported_phys |= MGMT_PHY_LE_2M_RX;
  		}
  
  		if (hdev->le_features[1] & HCI_LE_PHY_CODED) {
  			supported_phys |= MGMT_PHY_LE_CODED_TX;
  			supported_phys |= MGMT_PHY_LE_CODED_RX;
  		}
  	}
  
  	return supported_phys;
  }
  
  static u32 get_selected_phys(struct hci_dev *hdev)
  {
  	u32 selected_phys = 0;
  
  	if (lmp_bredr_capable(hdev)) {
  		selected_phys |= MGMT_PHY_BR_1M_1SLOT;
  
  		if (hdev->pkt_type & (HCI_DM3 | HCI_DH3))
  			selected_phys |= MGMT_PHY_BR_1M_3SLOT;
  
  		if (hdev->pkt_type & (HCI_DM5 | HCI_DH5))
  			selected_phys |= MGMT_PHY_BR_1M_5SLOT;
  
  		if (lmp_edr_2m_capable(hdev)) {
  			if (!(hdev->pkt_type & HCI_2DH1))
  				selected_phys |= MGMT_PHY_EDR_2M_1SLOT;
  
  			if (lmp_edr_3slot_capable(hdev) &&
  			    !(hdev->pkt_type & HCI_2DH3))
  				selected_phys |= MGMT_PHY_EDR_2M_3SLOT;
  
  			if (lmp_edr_5slot_capable(hdev) &&
  			    !(hdev->pkt_type & HCI_2DH5))
  				selected_phys |= MGMT_PHY_EDR_2M_5SLOT;
  
  			if (lmp_edr_3m_capable(hdev)) {
  				if (!(hdev->pkt_type & HCI_3DH1))
  					selected_phys |= MGMT_PHY_EDR_3M_1SLOT;
  
  				if (lmp_edr_3slot_capable(hdev) &&
  				    !(hdev->pkt_type & HCI_3DH3))
  					selected_phys |= MGMT_PHY_EDR_3M_3SLOT;
  
  				if (lmp_edr_5slot_capable(hdev) &&
  				    !(hdev->pkt_type & HCI_3DH5))
  					selected_phys |= MGMT_PHY_EDR_3M_5SLOT;
  			}
  		}
  	}
  
  	if (lmp_le_capable(hdev)) {
  		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_1M)
  			selected_phys |= MGMT_PHY_LE_1M_TX;
  
  		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_1M)
  			selected_phys |= MGMT_PHY_LE_1M_RX;
  
  		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_2M)
  			selected_phys |= MGMT_PHY_LE_2M_TX;
  
  		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_2M)
  			selected_phys |= MGMT_PHY_LE_2M_RX;
  
  		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_CODED)
  			selected_phys |= MGMT_PHY_LE_CODED_TX;
  
  		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_CODED)
  			selected_phys |= MGMT_PHY_LE_CODED_RX;
  	}
  
  	return selected_phys;
  }
  
  static u32 get_configurable_phys(struct hci_dev *hdev)
  {
  	return (get_supported_phys(hdev) & ~MGMT_PHY_BR_1M_1SLOT &
  		~MGMT_PHY_LE_1M_TX & ~MGMT_PHY_LE_1M_RX);
  }

  static u32 get_supported_settings(struct hci_dev *hdev)
  {
  	u32 settings = 0;
  
  	settings |= MGMT_SETTING_POWERED;

  	settings |= MGMT_SETTING_BONDABLE;

  	settings |= MGMT_SETTING_DEBUG_KEYS;

  	settings |= MGMT_SETTING_CONNECTABLE;
  	settings |= MGMT_SETTING_DISCOVERABLE;

  	if (lmp_bredr_capable(hdev)) {

  		if (hdev->hci_ver >= BLUETOOTH_VER_1_2)
  			settings |= MGMT_SETTING_FAST_CONNECTABLE;

  		settings |= MGMT_SETTING_BREDR;
  		settings |= MGMT_SETTING_LINK_SECURITY;

  
  		if (lmp_ssp_capable(hdev)) {
  			settings |= MGMT_SETTING_SSP;

  			if (IS_ENABLED(CONFIG_BT_HS))
  				settings |= MGMT_SETTING_HS;

  		}

  		if (lmp_sc_capable(hdev))

  			settings |= MGMT_SETTING_SECURE_CONN;

  		if (test_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,

  			     &hdev->quirks))

  			settings |= MGMT_SETTING_WIDEBAND_SPEECH;

  	}

  	if (lmp_le_capable(hdev)) {

  		settings |= MGMT_SETTING_LE;

  		settings |= MGMT_SETTING_SECURE_CONN;

  		settings |= MGMT_SETTING_PRIVACY;

  		settings |= MGMT_SETTING_STATIC_ADDRESS;

  
  		/* When the experimental feature for LL Privacy support is
  		 * enabled, then advertising is no longer supported.
  		 */
  		if (!hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
  			settings |= MGMT_SETTING_ADVERTISING;

  	}

  	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
  	    hdev->set_bdaddr)

  		settings |= MGMT_SETTING_CONFIGURATION;

  	settings |= MGMT_SETTING_PHY_CONFIGURATION;

  	return settings;
  }
  
  static u32 get_current_settings(struct hci_dev *hdev)
  {
  	u32 settings = 0;

  	if (hdev_is_powered(hdev))

  		settings |= MGMT_SETTING_POWERED;

  	if (hci_dev_test_flag(hdev, HCI_CONNECTABLE))

  		settings |= MGMT_SETTING_CONNECTABLE;

  	if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))

  		settings |= MGMT_SETTING_FAST_CONNECTABLE;

  	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))

  		settings |= MGMT_SETTING_DISCOVERABLE;

  	if (hci_dev_test_flag(hdev, HCI_BONDABLE))

  		settings |= MGMT_SETTING_BONDABLE;

  	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))

  		settings |= MGMT_SETTING_BREDR;

  	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))

  		settings |= MGMT_SETTING_LE;

  	if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY))

  		settings |= MGMT_SETTING_LINK_SECURITY;

  	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED))

  		settings |= MGMT_SETTING_SSP;

  	if (hci_dev_test_flag(hdev, HCI_HS_ENABLED))

  		settings |= MGMT_SETTING_HS;

  	if (hci_dev_test_flag(hdev, HCI_ADVERTISING))

  		settings |= MGMT_SETTING_ADVERTISING;

  	if (hci_dev_test_flag(hdev, HCI_SC_ENABLED))

  		settings |= MGMT_SETTING_SECURE_CONN;

  	if (hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS))

  		settings |= MGMT_SETTING_DEBUG_KEYS;

  	if (hci_dev_test_flag(hdev, HCI_PRIVACY))

  		settings |= MGMT_SETTING_PRIVACY;

  	/* The current setting for static address has two purposes. The
  	 * first is to indicate if the static address will be used and
  	 * the second is to indicate if it is actually set.
  	 *
  	 * This means if the static address is not configured, this flag

  	 * will never be set. If the address is configured, then if the

  	 * address is actually used decides if the flag is set or not.
  	 *
  	 * For single mode LE only controllers and dual-mode controllers
  	 * with BR/EDR disabled, the existence of the static address will
  	 * be evaluated.
  	 */

  	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||

  	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) ||

  	    !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
  		if (bacmp(&hdev->static_addr, BDADDR_ANY))
  			settings |= MGMT_SETTING_STATIC_ADDRESS;
  	}

  	if (hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED))
  		settings |= MGMT_SETTING_WIDEBAND_SPEECH;

  	return settings;
  }

  static struct mgmt_pending_cmd *pending_find(u16 opcode, struct hci_dev *hdev)
  {
  	return mgmt_pending_find(HCI_CHANNEL_CONTROL, opcode, hdev);
  }

  static struct mgmt_pending_cmd *pending_find_data(u16 opcode,
  						  struct hci_dev *hdev,
  						  const void *data)
  {
  	return mgmt_pending_find_data(HCI_CHANNEL_CONTROL, opcode, hdev, data);
  }

  u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev)

  {

  	struct mgmt_pending_cmd *cmd;

  
  	/* If there's a pending mgmt command the flags will not yet have
  	 * their final values, so check for this first.
  	 */

  	cmd = pending_find(MGMT_OP_SET_DISCOVERABLE, hdev);

  	if (cmd) {
  		struct mgmt_mode *cp = cmd->param;
  		if (cp->val == 0x01)
  			return LE_AD_GENERAL;
  		else if (cp->val == 0x02)
  			return LE_AD_LIMITED;
  	} else {

  		if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))

  			return LE_AD_LIMITED;

  		else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))

  			return LE_AD_GENERAL;
  	}
  
  	return 0;
  }

  bool mgmt_get_connectable(struct hci_dev *hdev)

  {
  	struct mgmt_pending_cmd *cmd;

  	/* If there's a pending mgmt command the flag will not yet have
  	 * it's final value, so check for this first.
  	 */
  	cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);
  	if (cmd) {
  		struct mgmt_mode *cp = cmd->param;

  		return cp->val;

  	}

  	return hci_dev_test_flag(hdev, HCI_CONNECTABLE);
  }

  static void service_cache_off(struct work_struct *work)
  {
  	struct hci_dev *hdev = container_of(work, struct hci_dev,

  					    service_cache.work);

  	struct hci_request req;

  	if (!hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))

  		return;

  	hci_req_init(&req, hdev);

  	hci_dev_lock(hdev);

  	__hci_req_update_eir(&req);

  	__hci_req_update_class(&req);

  
  	hci_dev_unlock(hdev);

  
  	hci_req_run(&req, NULL);

  }

  static void rpa_expired(struct work_struct *work)
  {
  	struct hci_dev *hdev = container_of(work, struct hci_dev,
  					    rpa_expired.work);
  	struct hci_request req;

  	bt_dev_dbg(hdev, "");

  	hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);

  	if (!hci_dev_test_flag(hdev, HCI_ADVERTISING))

  		return;
  
  	/* The generation of a new RPA and programming it into the

  	 * controller happens in the hci_req_enable_advertising()
  	 * function.

  	 */

  	hci_req_init(&req, hdev);

  	if (ext_adv_capable(hdev))
  		__hci_req_start_ext_adv(&req, hdev->cur_adv_instance);
  	else
  		__hci_req_enable_advertising(&req);

  	hci_req_run(&req, NULL);
  }

  static void mgmt_init_hdev(struct sock *sk, struct hci_dev *hdev)

  {

  	if (hci_dev_test_and_set_flag(hdev, HCI_MGMT))

  		return;

  	INIT_DELAYED_WORK(&hdev->service_cache, service_cache_off);

  	INIT_DELAYED_WORK(&hdev->rpa_expired, rpa_expired);

  	/* Non-mgmt controlled devices get this bit set
  	 * implicitly so that pairing works for them, however
  	 * for mgmt we require user-space to explicitly enable
  	 * it
  	 */

  	hci_dev_clear_flag(hdev, HCI_BONDABLE);

  }

  static int read_controller_info(struct sock *sk, struct hci_dev *hdev,

  				void *data, u16 data_len)

  {

  	struct mgmt_rp_read_info rp;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	hci_dev_lock(hdev);

  	memset(&rp, 0, sizeof(rp));

  	bacpy(&rp.bdaddr, &hdev->bdaddr);

  	rp.version = hdev->hci_ver;

  	rp.manufacturer = cpu_to_le16(hdev->manufacturer);

  
  	rp.supported_settings = cpu_to_le32(get_supported_settings(hdev));
  	rp.current_settings = cpu_to_le32(get_current_settings(hdev));

  	memcpy(rp.dev_class, hdev->dev_class, 3);

  	memcpy(rp.name, hdev->dev_name, sizeof(hdev->dev_name));

  	memcpy(rp.short_name, hdev->short_name, sizeof(hdev->short_name));

  	hci_dev_unlock(hdev);

  	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_INFO, 0, &rp,
  				 sizeof(rp));

  }

  static u16 append_eir_data_to_buf(struct hci_dev *hdev, u8 *eir)
  {
  	u16 eir_len = 0;
  	size_t name_len;
  
  	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
  		eir_len = eir_append_data(eir, eir_len, EIR_CLASS_OF_DEV,
  					  hdev->dev_class, 3);

  	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
  		eir_len = eir_append_le16(eir, eir_len, EIR_APPEARANCE,
  					  hdev->appearance);

  	name_len = strlen(hdev->dev_name);
  	eir_len = eir_append_data(eir, eir_len, EIR_NAME_COMPLETE,
  				  hdev->dev_name, name_len);
  
  	name_len = strlen(hdev->short_name);
  	eir_len = eir_append_data(eir, eir_len, EIR_NAME_SHORT,
  				  hdev->short_name, name_len);
  
  	return eir_len;
  }

  static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
  				    void *data, u16 data_len)
  {

  	char buf[512];
  	struct mgmt_rp_read_ext_info *rp = (void *)buf;

  	u16 eir_len;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	memset(&buf, 0, sizeof(buf));

  	hci_dev_lock(hdev);

  	bacpy(&rp->bdaddr, &hdev->bdaddr);
  
  	rp->version = hdev->hci_ver;
  	rp->manufacturer = cpu_to_le16(hdev->manufacturer);
  
  	rp->supported_settings = cpu_to_le32(get_supported_settings(hdev));
  	rp->current_settings = cpu_to_le32(get_current_settings(hdev));

  	eir_len = append_eir_data_to_buf(hdev, rp->eir);

  	rp->eir_len = cpu_to_le16(eir_len);

  
  	hci_dev_unlock(hdev);
  
  	/* If this command is called at least once, then the events
  	 * for class of device and local name changes are disabled
  	 * and only the new extended controller information event
  	 * is used.
  	 */
  	hci_sock_set_flag(sk, HCI_MGMT_EXT_INFO_EVENTS);
  	hci_sock_clear_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
  	hci_sock_clear_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);

  	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_EXT_INFO, 0, rp,
  				 sizeof(*rp) + eir_len);

  }
  
  static int ext_info_changed(struct hci_dev *hdev, struct sock *skip)
  {

  	char buf[512];
  	struct mgmt_ev_ext_info_changed *ev = (void *)buf;
  	u16 eir_len;
  
  	memset(buf, 0, sizeof(buf));

  	eir_len = append_eir_data_to_buf(hdev, ev->eir);
  	ev->eir_len = cpu_to_le16(eir_len);

  	return mgmt_limited_event(MGMT_EV_EXT_INFO_CHANGED, hdev, ev,
  				  sizeof(*ev) + eir_len,
  				  HCI_MGMT_EXT_INFO_EVENTS, skip);

  }

  static int send_settings_rsp(struct sock *sk, u16 opcode, struct hci_dev *hdev)

  {

  	__le32 settings = cpu_to_le32(get_current_settings(hdev));

  	return mgmt_cmd_complete(sk, hdev->id, opcode, 0, &settings,
  				 sizeof(settings));

  }

  static void clean_up_hci_complete(struct hci_dev *hdev, u8 status, u16 opcode)

  {

  	bt_dev_dbg(hdev, "status 0x%02x", status);

  	if (hci_conn_count(hdev) == 0) {
  		cancel_delayed_work(&hdev->power_off);

  		queue_work(hdev->req_workqueue, &hdev->power_off.work);

  	}

  }

  void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev, u8 instance)

  {
  	struct mgmt_ev_advertising_added ev;
  
  	ev.instance = instance;
  
  	mgmt_event(MGMT_EV_ADVERTISING_ADDED, hdev, &ev, sizeof(ev), sk);
  }

  void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
  			      u8 instance)

  {
  	struct mgmt_ev_advertising_removed ev;
  
  	ev.instance = instance;
  
  	mgmt_event(MGMT_EV_ADVERTISING_REMOVED, hdev, &ev, sizeof(ev), sk);
  }

  static void cancel_adv_timeout(struct hci_dev *hdev)
  {
  	if (hdev->adv_instance_timeout) {
  		hdev->adv_instance_timeout = 0;
  		cancel_delayed_work(&hdev->adv_instance_expire);
  	}
  }

  static int clean_up_hci_state(struct hci_dev *hdev)
  {
  	struct hci_request req;
  	struct hci_conn *conn;

  	bool discov_stopped;
  	int err;

  
  	hci_req_init(&req, hdev);
  
  	if (test_bit(HCI_ISCAN, &hdev->flags) ||
  	    test_bit(HCI_PSCAN, &hdev->flags)) {
  		u8 scan = 0x00;
  		hci_req_add(&req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
  	}

  	hci_req_clear_adv_instance(hdev, NULL, NULL, 0x00, false);

  	if (hci_dev_test_flag(hdev, HCI_LE_ADV))

  		__hci_req_disable_advertising(&req);

  	discov_stopped = hci_req_stop_discovery(&req);

  
  	list_for_each_entry(conn, &hdev->conn_hash.list, list) {

  		/* 0x15 == Terminated due to Power Off */
  		__hci_abort_conn(&req, conn, 0x15);

  	}

  	err = hci_req_run(&req, clean_up_hci_complete);
  	if (!err && discov_stopped)
  		hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
  
  	return err;

  }

  static int set_powered(struct sock *sk, struct hci_dev *hdev, void *data,

  		       u16 len)

  {

  	struct mgmt_mode *cp = data;

  	struct mgmt_pending_cmd *cmd;

  	int err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	if (cp->val != 0x00 && cp->val != 0x01)

  		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_POWERED,
  				       MGMT_STATUS_INVALID_PARAMS);

  	hci_dev_lock(hdev);

  	if (pending_find(MGMT_OP_SET_POWERED, hdev)) {

  		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_POWERED,
  				      MGMT_STATUS_BUSY);

  		goto failed;
  	}

  	if (!!cp->val == hdev_is_powered(hdev)) {

  		err = send_settings_rsp(sk, MGMT_OP_SET_POWERED, hdev);

  		goto failed;
  	}

  	cmd = mgmt_pending_add(sk, MGMT_OP_SET_POWERED, hdev, data, len);

  	if (!cmd) {
  		err = -ENOMEM;

  		goto failed;

  	}

  	if (cp->val) {

  		queue_work(hdev->req_workqueue, &hdev->power_on);

  		err = 0;
  	} else {
  		/* Disconnect connections, stop scans, etc */
  		err = clean_up_hci_state(hdev);

  		if (!err)
  			queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
  					   HCI_POWER_OFF_TIMEOUT);

  		/* ENODATA means there were no HCI commands queued */
  		if (err == -ENODATA) {

  			cancel_delayed_work(&hdev->power_off);

  			queue_work(hdev->req_workqueue, &hdev->power_off.work);
  			err = 0;
  		}
  	}

  
  failed:

  	hci_dev_unlock(hdev);

  	return err;

  }

  static int new_settings(struct hci_dev *hdev, struct sock *skip)
  {

  	__le32 ev = cpu_to_le32(get_current_settings(hdev));

  	return mgmt_limited_event(MGMT_EV_NEW_SETTINGS, hdev, &ev,
  				  sizeof(ev), HCI_MGMT_SETTING_EVENTS, skip);

  }

  int mgmt_new_settings(struct hci_dev *hdev)
  {
  	return new_settings(hdev, NULL);
  }

  struct cmd_lookup {
  	struct sock *sk;
  	struct hci_dev *hdev;
  	u8 mgmt_status;
  };

  static void settings_rsp(struct mgmt_pending_cmd *cmd, void *data)

  {
  	struct cmd_lookup *match = data;
  
  	send_settings_rsp(cmd->sk, cmd->opcode, match->hdev);
  
  	list_del(&cmd->list);
  
  	if (match->sk == NULL) {
  		match->sk = cmd->sk;
  		sock_hold(match->sk);
  	}
  
  	mgmt_pending_free(cmd);
  }

  static void cmd_status_rsp(struct mgmt_pending_cmd *cmd, void *data)

  {
  	u8 *status = data;

  	mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, *status);

  	mgmt_pending_remove(cmd);
  }

  static void cmd_complete_rsp(struct mgmt_pending_cmd *cmd, void *data)

  {
  	if (cmd->cmd_complete) {
  		u8 *status = data;
  
  		cmd->cmd_complete(cmd, *status);
  		mgmt_pending_remove(cmd);
  
  		return;
  	}
  
  	cmd_status_rsp(cmd, data);
  }

  static int generic_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)

  {

  	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
  				 cmd->param, cmd->param_len);

  }

  static int addr_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)

  {

  	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
  				 cmd->param, sizeof(struct mgmt_addr_info));

  }

  static u8 mgmt_bredr_support(struct hci_dev *hdev)
  {
  	if (!lmp_bredr_capable(hdev))
  		return MGMT_STATUS_NOT_SUPPORTED;

  	else if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))

  		return MGMT_STATUS_REJECTED;
  	else
  		return MGMT_STATUS_SUCCESS;
  }
  
  static u8 mgmt_le_support(struct hci_dev *hdev)
  {
  	if (!lmp_le_capable(hdev))
  		return MGMT_STATUS_NOT_SUPPORTED;

  	else if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))

  		return MGMT_STATUS_REJECTED;
  	else
  		return MGMT_STATUS_SUCCESS;
  }

  void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status)

  {

  	struct mgmt_pending_cmd *cmd;

  	bt_dev_dbg(hdev, "status 0x%02x", status);

  
  	hci_dev_lock(hdev);

  	cmd = pending_find(MGMT_OP_SET_DISCOVERABLE, hdev);

  	if (!cmd)
  		goto unlock;
  
  	if (status) {
  		u8 mgmt_err = mgmt_status(status);

  		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);

  		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);

  		goto remove_cmd;
  	}

  	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
  	    hdev->discov_timeout > 0) {
  		int to = msecs_to_jiffies(hdev->discov_timeout * 1000);
  		queue_delayed_work(hdev->req_workqueue, &hdev->discov_off, to);

  	}

  
  	send_settings_rsp(cmd->sk, MGMT_OP_SET_DISCOVERABLE, hdev);

  	new_settings(hdev, cmd->sk);

  remove_cmd:
  	mgmt_pending_remove(cmd);
  
  unlock:
  	hci_dev_unlock(hdev);
  }

  static int set_discoverable(struct sock *sk, struct hci_dev *hdev, void *data,

  			    u16 len)

  {

  	struct mgmt_cp_set_discoverable *cp = data;

  	struct mgmt_pending_cmd *cmd;

  	u16 timeout;

  	int err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
  	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))

  		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
  				       MGMT_STATUS_REJECTED);

  	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)

  		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
  				       MGMT_STATUS_INVALID_PARAMS);

  	timeout = __le16_to_cpu(cp->timeout);

  
  	/* Disabling discoverable requires that no timeout is set,
  	 * and enabling limited discoverable requires a timeout.
  	 */
  	if ((cp->val == 0x00 && timeout > 0) ||
  	    (cp->val == 0x02 && timeout == 0))

  		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
  				       MGMT_STATUS_INVALID_PARAMS);

  	hci_dev_lock(hdev);

  	if (!hdev_is_powered(hdev) && timeout > 0) {

  		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
  				      MGMT_STATUS_NOT_POWERED);

  		goto failed;
  	}

  	if (pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
  	    pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {

  		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
  				      MGMT_STATUS_BUSY);

  		goto failed;
  	}

  	if (!hci_dev_test_flag(hdev, HCI_CONNECTABLE)) {

  		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
  				      MGMT_STATUS_REJECTED);

  		goto failed;
  	}

  	if (hdev->advertising_paused) {
  		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
  				      MGMT_STATUS_BUSY);
  		goto failed;
  	}

  	if (!hdev_is_powered(hdev)) {

  		bool changed = false;

  		/* Setting limited discoverable when powered off is
  		 * not a valid operation since it requires a timeout
  		 * and so no need to check HCI_LIMITED_DISCOVERABLE.
  		 */

  		if (!!cp->val != hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) {

  			hci_dev_change_flag(hdev, HCI_DISCOVERABLE);

  			changed = true;
  		}

  		err = send_settings_rsp(sk, MGMT_OP_SET_DISCOVERABLE, hdev);

  		if (err < 0)
  			goto failed;
  
  		if (changed)
  			err = new_settings(hdev, sk);

  		goto failed;
  	}

  	/* If the current mode is the same, then just update the timeout
  	 * value with the new value. And if only the timeout gets updated,
  	 * then no need for any HCI transactions.
  	 */

  	if (!!cp->val == hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
  	    (cp->val == 0x02) == hci_dev_test_flag(hdev,
  						   HCI_LIMITED_DISCOVERABLE)) {

  		cancel_delayed_work(&hdev->discov_off);
  		hdev->discov_timeout = timeout;

  		if (cp->val && hdev->discov_timeout > 0) {
  			int to = msecs_to_jiffies(hdev->discov_timeout * 1000);

  			queue_delayed_work(hdev->req_workqueue,
  					   &hdev->discov_off, to);

  		}

  		err = send_settings_rsp(sk, MGMT_OP_SET_DISCOVERABLE, hdev);

  		goto failed;
  	}

  	cmd = mgmt_pending_add(sk, MGMT_OP_SET_DISCOVERABLE, hdev, data, len);

  	if (!cmd) {
  		err = -ENOMEM;

  		goto failed;

  	}

  	/* Cancel any potential discoverable timeout that might be
  	 * still active and store new timeout value. The arming of
  	 * the timeout happens in the complete handler.
  	 */
  	cancel_delayed_work(&hdev->discov_off);
  	hdev->discov_timeout = timeout;

  	if (cp->val)
  		hci_dev_set_flag(hdev, HCI_DISCOVERABLE);
  	else
  		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);

  	/* Limited discoverable mode */
  	if (cp->val == 0x02)

  		hci_dev_set_flag(hdev, HCI_LIMITED_DISCOVERABLE);

  	else

  		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);

  	queue_work(hdev->req_workqueue, &hdev->discoverable_update);
  	err = 0;

  
  failed:

  	hci_dev_unlock(hdev);

  	return err;
  }

  void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status)

  {

  	struct mgmt_pending_cmd *cmd;

  	bt_dev_dbg(hdev, "status 0x%02x", status);

  
  	hci_dev_lock(hdev);

  	cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);

  	if (!cmd)
  		goto unlock;

  	if (status) {
  		u8 mgmt_err = mgmt_status(status);

  		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);

  		goto remove_cmd;
  	}

  	send_settings_rsp(cmd->sk, MGMT_OP_SET_CONNECTABLE, hdev);

  	new_settings(hdev, cmd->sk);

  remove_cmd:

  	mgmt_pending_remove(cmd);
  
  unlock:
  	hci_dev_unlock(hdev);
  }

  static int set_connectable_update_settings(struct hci_dev *hdev,
  					   struct sock *sk, u8 val)
  {
  	bool changed = false;
  	int err;

  	if (!!val != hci_dev_test_flag(hdev, HCI_CONNECTABLE))

  		changed = true;
  
  	if (val) {

  		hci_dev_set_flag(hdev, HCI_CONNECTABLE);

  	} else {

  		hci_dev_clear_flag(hdev, HCI_CONNECTABLE);
  		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);

  	}
  
  	err = send_settings_rsp(sk, MGMT_OP_SET_CONNECTABLE, hdev);
  	if (err < 0)
  		return err;

  	if (changed) {

  		hci_req_update_scan(hdev);

  		hci_update_background_scan(hdev);

  		return new_settings(hdev, sk);

  	}

  
  	return 0;
  }

  static int set_connectable(struct sock *sk, struct hci_dev *hdev, void *data,

  			   u16 len)

  {

  	struct mgmt_mode *cp = data;

  	struct mgmt_pending_cmd *cmd;

  	int err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
  	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))

  		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
  				       MGMT_STATUS_REJECTED);

  	if (cp->val != 0x00 && cp->val != 0x01)

  		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
  				       MGMT_STATUS_INVALID_PARAMS);

  	hci_dev_lock(hdev);

  	if (!hdev_is_powered(hdev)) {

  		err = set_connectable_update_settings(hdev, sk, cp->val);

  		goto failed;
  	}

  	if (pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
  	    pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {

  		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
  				      MGMT_STATUS_BUSY);

  		goto failed;
  	}

  	cmd = mgmt_pending_add(sk, MGMT_OP_SET_CONNECTABLE, hdev, data, len);

  	if (!cmd) {
  		err = -ENOMEM;

  		goto failed;

  	}

  	if (cp->val) {
  		hci_dev_set_flag(hdev, HCI_CONNECTABLE);
  	} else {
  		if (hdev->discov_timeout > 0)
  			cancel_delayed_work(&hdev->discov_off);

  		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
  		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
  		hci_dev_clear_flag(hdev, HCI_CONNECTABLE);

  	}

  	queue_work(hdev->req_workqueue, &hdev->connectable_update);
  	err = 0;

  
  failed:

  	hci_dev_unlock(hdev);

  	return err;
  }

  static int set_bondable(struct sock *sk, struct hci_dev *hdev, void *data,

  			u16 len)

  {

  	struct mgmt_mode *cp = data;

  	bool changed;

  	int err;

  	bt_dev_dbg(hdev, "sock %p", sk);

  	if (cp->val != 0x00 && cp->val != 0x01)

  		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BONDABLE,
  				       MGMT_STATUS_INVALID_PARAMS);

  	hci_dev_lock(hdev);

  
  	if (cp->val)

  		changed = !hci_dev_test_and_set_flag(hdev, HCI_BONDABLE);