/* * Author: Sven Gothel * Copyright (c) 2020 Gothel Software e.K. * Copyright (c) 2020 ZAFENA AB * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * 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. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef BT_DEVICE_HPP_ #define BT_DEVICE_HPP_ #include #include #include #include #include #include #include "BTTypes1.hpp" #include "HCIIoctl.hpp" #include "HCIComm.hpp" #include "MgmtTypes.hpp" #include "SMPHandler.hpp" #include "BTGattHandler.hpp" #include "SMPKeyBin.hpp" namespace direct_bt { // ************************************************* // ************************************************* // ************************************************* class BTAdapter; // forward class AdapterStatusListener; // forward /** * BTDevice represents one remote Bluetooth device. * * @anchor BTDeviceRoles * Invariable remote BTDevice roles (see getRole()): * * - {@link BTRole::Master}: The remote device has discovered us and maybe is connected to us. The remote device acts as a ::GATTRole::Client. * - {@link BTRole::Slave}: The remote device has advertised and maybe we are connected to it. The remote device acts as a ::GATTRole::Server. * * Note the local {@link BTAdapter}'s [opposite role](@ref BTAdapterRoles). * * @see BTAdapter * @see [BTAdapter roles](@ref BTAdapterRoles). * @see [BTGattHandler roles](@ref BTGattHandlerRoles). * @see [Bluetooth Specification](https://www.bluetooth.com/specifications/bluetooth-core-specification/) */ class BTDevice : public BTObject { friend BTAdapter; // managing us: ctor and update(..) during discovery friend BTGattHandler; // may issue detailed disconnect(..) private: BTAdapter & adapter; BTRole btRole; std::unique_ptr l2cap_att; uint64_t ts_last_discovery; uint64_t ts_last_update; std::string name; int8_t rssi = 127; // The core spec defines 127 as the "not available" value int8_t tx_power = 127; // The core spec defines 127 as the "not available" value std::shared_ptr eir; // Merged EIR (using shared_ptr to allow CoW style update) std::shared_ptr eir_ind; // AD_IND EIR std::shared_ptr eir_scan_rsp; // AD_SCAN_RSP EIR jau::relaxed_atomic_uint16 hciConnHandle; jau::ordered_atomic le_features; jau::ordered_atomic le_phy_tx; jau::ordered_atomic le_phy_rx; std::shared_ptr smpHandler = nullptr; std::recursive_mutex mtx_smpHandler; std::shared_ptr gattHandler = nullptr; mutable std::recursive_mutex mtx_gattHandler; mutable std::recursive_mutex mtx_connect; mutable std::mutex mtx_eir; jau::sc_atomic_bool isConnected; jau::sc_atomic_bool allowDisconnect; // allowDisconnect = isConnected || 'isConnectIssued' jau::relaxed_atomic_int32 supervision_timeout; // [ms] jau::relaxed_atomic_uint32 smp_events; // registering smp events until next BTAdapter::smp_watchdog periodic timeout check struct PairingData { SMPIOCapability ioCap_conn = SMPIOCapability::UNSET; SMPIOCapability ioCap_user = SMPIOCapability::UNSET; BTSecurityLevel sec_level_conn = BTSecurityLevel::UNSET; BTSecurityLevel sec_level_user = BTSecurityLevel::UNSET; SMPIOCapability ioCap_auto = SMPIOCapability::UNSET; // not cleared by clearSMPStates() SMPPairingState state; PairingMode mode; bool res_requested_sec; bool use_sc; bool encryption_enabled; SMPAuthReqs authReqs_init, authReqs_resp; SMPIOCapability ioCap_init, ioCap_resp; SMPOOBDataFlag oobFlag_init, oobFlag_resp; uint8_t maxEncsz_init, maxEncsz_resp; SMPKeyType keys_init_exp, keys_resp_exp; SMPKeyType keys_init_has, keys_resp_has; // LTK: Set of Long Term Key data: ltk, ediv + rand SMPLongTermKey ltk_init, ltk_resp; // IRK SMPIdentityResolvingKey irk_init, irk_resp; // Identity Address Information BDAddressAndType id_address_init, id_address_resp; // CSRK SMPSignatureResolvingKey csrk_init, csrk_resp; // Link Key SMPLinkKey lk_init, lk_resp; /** * Return verbose string representation of PairingData * @param addressAndType remote address of the BTDevice * @param role remote role of the BTDevice */ std::string toString(const uint16_t dev_id, const BDAddressAndType& addressAndType, const BTRole& role) const; }; PairingData pairing_data; mutable std::recursive_mutex mtx_pairing; std::condition_variable_any cv_pairing_state_changed; mutable jau::sc_atomic_bool sync_data; /** Private class only for private make_shared(). */ class ctor_cookie { friend BTDevice; ctor_cookie(const uint16_t secret) { (void)secret; } }; /** Private std::make_shared(..) vehicle for friends. */ static std::shared_ptr make_shared(BTAdapter & adapter, EInfoReport const & r) { return std::make_shared(BTDevice::ctor_cookie(0), adapter, r); } void clearData() noexcept; EIRDataType update(EInfoReport const & data) noexcept; EIRDataType update(GattGenericAccessSvc const &data, const uint64_t timestamp) noexcept; void notifyDisconnected() noexcept; void notifyConnected(std::shared_ptr sthis, const uint16_t handle, const SMPIOCapability io_cap) noexcept; void notifyLEFeatures(std::shared_ptr sthis, const LE_Features features) noexcept; void notifyLEPhyUpdateComplete(const HCIStatusCode status, const LE_PHYs Tx, const LE_PHYs Rx) noexcept; /** * Setup L2CAP channel connection to device incl. optional security encryption level off-thread. *

* Will be performed after connectLE(..), i.e. notifyConnected() and notifyLEFeatures(), * initiated by the latter. *

*/ void processL2CAPSetup(std::shared_ptr sthis); /** * Established SMP host connection and security for L2CAP connection if sec_level > BTSecurityLevel::NONE. *

* Will be performed after connectLE(..), i.e. notifyConnected() and notifyLEFeatures().
* Called from processL2CAPSetup, if supported. *

*

* If sec_level > BTSecurityLevel::NONE, sets the BlueZ's L2CAP socket BT_SECURITY sec_level, determining the SMP security mode per connection. *

*

* The SMPHandler is managed by this device instance and closed via disconnectSMP(). *

* * @param sec_level sec_level <= BTSecurityLevel::NONE will not set security level and returns false. * @return true if a security level > BTSecurityLevel::NONE has been set successfully, false if no security level has been set or if it failed. */ bool connectSMP(std::shared_ptr sthis, const BTSecurityLevel sec_level) noexcept; bool checkPairingKeyDistributionComplete() const noexcept; bool updatePairingState(std::shared_ptr sthis, const MgmtEvent& evt, const HCIStatusCode evtStatus, SMPPairingState claimed_state) noexcept; /** * Forwarded from HCIHandler -> BTAdapter -> this BTDevice *

* Will be initiated by processL2CAPSetup()'s security_level setup after connectLE(..), i.e. notifyConnected() and notifyLEFeatures(). *

*/ void hciSMPMsgCallback(std::shared_ptr sthis, const SMPPDUMsg& msg, const HCIACLData::l2cap_frame& source) noexcept; /** * Setup GATT via connectGATT() off-thread. *

*

* Will be performed after connectLE(..), i.e. notifyConnected() and notifyLEFeatures().
* Called from either processL2CAPSetup() w/o security or with SMP security readiness from hciSMPMsgCallback(). *

*/ void processDeviceReady(std::shared_ptr sthis, const uint64_t timestamp); /** * Returns a newly established GATT connection. *

* Will be performed after connectLE(..) via notifyConnected(), processNotifyConnectedOffThread(). *

*

* The GATTHandler is managed by this device instance and closed via disconnectGATT(). *

*/ bool connectGATT(std::shared_ptr sthis) noexcept; /** * Will be performed within disconnect() and notifyDisconnected(). */ void disconnectGATT(const int caller) noexcept; /** * Will be performed within disconnect() and notifyDisconnected(). */ void disconnectSMP(const int caller) noexcept; void clearSMPStates(const bool connected) noexcept; void sendMgmtEvDeviceDisconnected(std::unique_ptr evt) noexcept; public: const uint64_t ts_creation; /** Device's unique mac address and type tuple. */ const BDAddressAndType addressAndType; // FIXME: Mutable for resolvable -> identity during pairing? /** Private ctor for private BTDevice::make_shared() intended for friends. */ BTDevice(const BTDevice::ctor_cookie& cc, BTAdapter & adapter, EInfoReport const & r); BTDevice(const BTDevice&) = delete; void operator=(const BTDevice&) = delete; /** * Releases this instance after calling {@link #remove()}. */ ~BTDevice() noexcept override; std::string get_java_class() const noexcept override { return java_class(); } static std::string java_class() noexcept { return std::string(JAVA_DBT_PACKAGE "DBTDevice"); } /** Returns the managing adapter */ BTAdapter & getAdapter() const { return adapter; } /** Returns the shared pointer of this instance managed by the adapter. */ std::shared_ptr getSharedInstance() const noexcept; /** * Return the fixed BTRole of this remote BTDevice. * @see BTRole * @see @ref BTDeviceRoles * @since 2.4.0 */ BTRole getRole() const noexcept { return btRole; } /** * Return the local GATTRole operating for the remote BTDevice. * @see @ref BTGattHandlerRoles * @see @ref BTDeviceRoles * @since 2.4.0 */ GATTRole getLocalGATTRole() const noexcept; /** * Returns the timestamp in monotonic milliseconds when this device instance has been created, * either via its initial discovery or its initial direct connection. * @see BasicTypes::getCurrentMilliseconds() */ uint64_t getCreationTimestamp() const noexcept { return ts_creation; } /** * Returns the timestamp in monotonic milliseconds when this device instance has * discovered or connected directly the last time. * @see BasicTypes::getCurrentMilliseconds() */ uint64_t getLastDiscoveryTimestamp() const noexcept { return ts_last_discovery; } /** * Returns the timestamp in monotonic milliseconds when this device instance underlying data * has been updated the last time. * @see BasicTypes::getCurrentMilliseconds() */ uint64_t getLastUpdateTimestamp() const noexcept { return ts_last_update; } /** * @see getLastUpdateTimestamp() */ uint64_t getLastUpdateAge(const uint64_t ts_now) const noexcept { return ts_now - ts_last_update; } /** * Returns the unique device EUI48 address and BDAddressType type. * @since 2.2.0 */ constexpr BDAddressAndType const & getAddressAndType() const noexcept { return addressAndType; } /** Return RSSI of device as recognized at discovery and connect. */ int8_t getRSSI() const noexcept { return rssi; } /** Return Tx Power of device as recognized at discovery and connect. */ int8_t getTxPower() const noexcept { return tx_power; } /** * Returns the remote device name. * * The name has been set by the advertised EInfoReport if available, * otherwise by the GATT GenericAccess data post connection. */ std::string const getName() const noexcept; /** * Return the merged advertised EInfoReport for this remote device. * * The EInfoReport is updated by new scan-reports (update) and when disconnected (empty). * @since 2.5.3 */ std::shared_ptr getEIR() noexcept; /** * Return the latest advertised EInfoReport AD_IND variant for this remote device. * * The EInfoReport is replaced by new scan-reports only. * @since 2.6.6 */ std::shared_ptr getEIRInd() noexcept; /** * Return the latest advertised EInfoReport AD_SCAN_RSP for this remote device. * * The EInfoReport is replaced by new scan-reports only. * @since 2.6.6 */ std::shared_ptr getEIRScanRsp() noexcept; std::string toString() const noexcept override { return toString(false); } std::string toString(bool includeDiscoveredServices) const noexcept; /** * Add the given AdapterStatusListener to the list if not already present, * intended to listen only for events matching this device. * * User needs to implement AdapterStatusListener::matchDevice() for the latter. * * The AdapterStatusListener is released at remove() or this device's destruction. *

* Returns true if the given listener is not element of the list and has been newly added, * otherwise false. *

*

* The newly added AdapterStatusListener will receive an initial * AdapterStatusListener::adapterSettingsChanged(..) event, * passing an empty AdapterSetting::NONE oldMask and changedMask, as well as current AdapterSetting newMask.
* This allows the receiver to be aware of this adapter's current settings. *

* @since 2.3.0 * @see BTAdapter::addStatusListener() * @see BTAdapter::removeStatusListener() * @see BTAdapter::removeAllStatusListener() * @see removeStatusListener() */ bool addStatusListener(std::shared_ptr l); /** * Remove the given listener from the list. *

* Returns true if the given listener is an element of the list and has been removed, * otherwise false. *

* @since 2.3.0 * @see BTAdapter::removeStatusListener() * @see BTAdapter::removeStatusListener() * @see BTAdapter::removeAllStatusListener() * @see addStatusListener() */ bool removeStatusListener(std::shared_ptr l); /** * Retrieves the current connection info for this device and returns the ConnectionInfo reference if successful, * otherwise returns nullptr. *

* Before this method returns, the internal rssi and tx_power will be updated if any changed * and therefore all BTAdapterStatusListener's deviceUpdated(..) method called for notification. *

*/ std::shared_ptr getConnectionInfo() noexcept; /** * Return true if the device has been successfully connected, otherwise false. */ bool getConnected() noexcept { return isConnected; } /** * Establish a HCI BDADDR_LE_PUBLIC or BDADDR_LE_RANDOM connection to this device. *

* BT Core Spec v5.2: Vol 4, Part E HCI: 7.8.12 LE Create Connection command *

*

* If this device's addressType is not BDADDR_LE_PUBLIC or BDADDR_LE_RANDOM, * HCIStatusCode::UNACCEPTABLE_CONNECTION_PARAM is being returned. *

*

* The actual new connection handle will be delivered asynchronous and * the connection event can be caught via AdapterStatusListener::deviceConnected(..), * or if failed via AdapterStatusListener::deviceDisconnected(..). *

*

* The device is tracked by the managing adapter. *

*

* Default parameter values are chosen for using public address resolution * and usual connection latency, interval etc. *

*

* Set window to the same value as the interval, enables continuous scanning. *

*

* The associated BTAdapter's HCIHandler instance is used to connect, * see HCIHandler::le_create_conn(). *

* * @param le_scan_interval in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s] * @param le_scan_window in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s]. Shall be <= le_scan_interval * @param conn_interval_min in units of 1.25ms, default value 8 for 10ms; Value range [6 .. 3200] for [7.5ms .. 4000ms] * @param conn_interval_max in units of 1.25ms, default value 12 for 15ms; Value range [6 .. 3200] for [7.5ms .. 4000ms] * @param conn_latency slave latency in units of connection events, default value 0; Value range [0 .. 0x01F3]. See Range of [0 - getHCIMaxConnLatency()]. * @param conn_supervision_timeout in units of 10ms, default value >= 10 x conn_interval_max; Value range [0xA-0x0C80] for [100ms - 32s]. We use 500ms minimum, i.e. getHCIConnSupervisorTimeout(0, 15, ::HCIConstInt::LE_CONN_MIN_TIMEOUT_MS). * @return HCIStatusCode::SUCCESS if the command has been accepted, otherwise HCIStatusCode may disclose reason for rejection. */ HCIStatusCode connectLE(const uint16_t le_scan_interval=24, const uint16_t le_scan_window=24, const uint16_t conn_interval_min=8, const uint16_t conn_interval_max=12, const uint16_t conn_latency=0, const uint16_t conn_supervision_timeout=getHCIConnSupervisorTimeout(0, 15)) noexcept; /** * Establish a HCI BDADDR_BREDR connection to this device. *

* BT Core Spec v5.2: Vol 4, Part E HCI: 7.1.5 Create Connection command *

*

* If this device's addressType is not BDADDR_BREDR, * HCIStatusCode::UNACCEPTABLE_CONNECTION_PARAM is being returned. *

*

* The actual new connection handle will be delivered asynchronous and * the connection event can be caught via AdapterStatusListener::deviceConnected(..), * or if failed via AdapterStatusListener::deviceDisconnected(..). *

*

* The device is tracked by the managing adapter. *

*

* The associated BTAdapter's HCIHandler instance is used to connect, * see HCIHandler::create_conn(). *

* @return HCIStatusCode::SUCCESS if the command has been accepted, otherwise HCIStatusCode may disclose reason for rejection. */ HCIStatusCode connectBREDR(const uint16_t pkt_type=HCI_DM1 | HCI_DM3 | HCI_DM5 | HCI_DH1 | HCI_DH3 | HCI_DH5, const uint16_t clock_offset=0x0000, const uint8_t role_switch=0x01) noexcept; /** * Establish a default HCI connection to this device, using certain default parameter. *

* BT Core Spec v5.2: Vol 4, Part E HCI: 7.8.12 LE Create Connection command
* BT Core Spec v5.2: Vol 4, Part E HCI: 7.1.5 Create Connection command *

*

* Depending on this device's addressType, * either a BREDR (BDADDR_BREDR) or LE (BDADDR_LE_PUBLIC, BDADDR_LE_RANDOM) connection is attempted.
* If unacceptable, HCIStatusCode::UNACCEPTABLE_CONNECTION_PARAM is being returned. *

*

* The actual new connection handle will be delivered asynchronous and * the connection event can be caught via AdapterStatusListener::deviceConnected(..), * or if failed via AdapterStatusListener::deviceDisconnected(..). *

* The device is tracked by the managing adapter. *

*

* See connectLE() and connectBREDR() for more details. *

* @return HCIStatusCode::SUCCESS if the command has been accepted, otherwise HCIStatusCode may disclose reason for rejection. */ HCIStatusCode connectDefault() noexcept; /** Return the HCI connection handle to the LE or BREDR peer, zero if not connected. */ uint16_t getConnectionHandle() const noexcept { return hciConnHandle; } /** * Request and return LE_PHYs bit for the given connection. * 
             * BT Core Spec v5.2: Vol 4, Part E, 7.8.47 LE Read PHY command
             *
* @param resTx reference for the resulting transmitter LE_PHYs bit * @param resRx reference for the resulting receiver LE_PHYs bit * @return HCIStatusCode * @see getTxPhys() * @see getRxPhys() * @see getConnectedLE_PHY() * @see setConnectedLE_PHY() * @see BTAdapter::setDefaultLE_PHY() * @since 2.4.0 */ HCIStatusCode getConnectedLE_PHY(LE_PHYs& resTx, LE_PHYs& resRx) noexcept; /** * Return the Tx LE_PHYs as notified via HCIMetaEventType::LE_PHY_UPDATE_COMPLETE * or retrieved via getConnectedLE_PHY() * @see getTxPhys() * @see getRxPhys() * @see getConnectedLE_PHY() * @see setConnectedLE_PHY() * @see BTAdapter::setDefaultLE_PHY() * @since 2.4.0 */ LE_PHYs getTxPhys() const noexcept { return le_phy_tx; } /** * Return the Rx LE_PHYs as notified via HCIMetaEventType::LE_PHY_UPDATE_COMPLETE * or retrieved via getConnectedLE_PHY() * @see getTxPhys() * @see getRxPhys() * @see getConnectedLE_PHY() * @see setConnectedLE_PHY() * @see BTAdapter::setDefaultLE_PHY() * @since 2.4.0 */ LE_PHYs getRxPhys() const noexcept { return le_phy_rx; } /** * Sets preference of used LE_PHYs for the given connection. * * - BT Core Spec v5.2: Vol 4, Part E, 7.8.49 LE Set PHY command * - BT Core Spec v5.2: Vol 4, Part E, 7.7.65.12 LE PHY Update Complete event * * @param Tx transmitter LE_PHYs bit mask of preference if not set to LE_PHYs::NONE (ignored). * @param Rx receiver LE_PHYs bit mask of preference if not set to LE_PHYs::NONE (ignored). * @return * @see getTxPhys() * @see getRxPhys() * @see getConnectedLE_PHY() * @see setConnectedLE_PHY() * @see BTAdapter::setDefaultLE_PHY() * @since 2.4.0 */ HCIStatusCode setConnectedLE_PHY(const LE_PHYs Tx, const LE_PHYs Rx) noexcept; /** * Disconnect the LE or BREDR peer's GATT and HCI connection. *

* BT Core Spec v5.2: Vol 4, Part E HCI: 7.1.6 Disconnect command *

*

* The actual disconnect event will be delivered asynchronous and * the connection event can be caught via AdapterStatusListener::deviceDisconnected(..). *

*

* The device will be removed from the managing adapter's connected devices * when AdapterStatusListener::deviceDisconnected(..) has been received. *

*

* An open GATTHandler will also be closed.
* The connection to this device is removed, removing all connected profiles. *

*

* An application using one thread per device and rapid connect, should either use disconnect() or remove(), * but never issue remove() after disconnect(). Doing so would eventually delete the device being already * in use by another thread due to discovery post disconnect! *

*

* The associated BTAdapter's HCIHandler instance is used to disconnect, * see HCIHandler::disconnect(). *

* @return HCIStatusCode::SUCCESS if the command has been accepted, otherwise HCIStatusCode may disclose reason for rejection. */ HCIStatusCode disconnect(const HCIStatusCode reason=HCIStatusCode::REMOTE_USER_TERMINATED_CONNECTION ) noexcept; /** * Returns the available ::SMPKeyType mask for the responder (LL slave) or initiator (LL master). * @param responder if true, queries the responder (LL slave) key, otherwise the initiator (LL master) key. * @return ::SMPKeyType mask result * @see ::SMPPairingState::COMPLETED * @see AdapterStatusListener::deviceReady() */ SMPKeyType getAvailableSMPKeys(const bool responder) const noexcept; /** * Copy all keys from the given SMPKeyBin into this BTDevice. * * Issue uploadKeys() to upload all SMP keys to the adapter * before connecting to enable pre-pairing. * * If SMPKeyBin::isValid() and initiator or responder LTK available, * the following procedure will be applied to this BTDevice: * * - If BTSecurityLevel _is_ BTSecurityLevel::NONE * + Setting security to ::BTSecurityLevel::NONE and ::SMPIOCapability::NO_INPUT_NO_OUTPUT via BTDevice::setConnSecurity() * - else if BTSecurityLevel > BTSecurityLevel::NONE * + Setting security to ::BTSecurityLevel::ENC_ONLY and ::SMPIOCapability::NO_INPUT_NO_OUTPUT via BTDevice::setConnSecurity() * - Copying all keys from SMPKeyBin to this device, without uploading to the adapter * * ::BTSecurityLevel::ENC_ONLY is set to avoid a new SMP ::PairingMode negotiation, * which is undesired as this instances' stored LTK shall be used for ::PairingMode::PRE_PAIRED. * * @param bin * @return true if successful, false if pairing is currently in progress * @see setLongTermKey() * @see setIdentityResolvingKey() * @see setSignatureResolvingKey() * @see setLinkKey() * @see uploadKeys() * @since 2.4.0 */ bool setSMPKeyBin(const SMPKeyBin& bin) noexcept; /** * Upload all set keys to the adapter for pre-pairing. * * Must be called before connecting to this device, otherwise HCIStatusCode::CONNECTION_ALREADY_EXISTS will be returned. * * @return ::HCIStatusCode::SUCCESS if successful, otherwise the appropriate error code. * @see setLongTermKey() * @see setIdentityResolvingKey() * @see setSignatureResolvingKey() * @see setLinkKey() * @see setSMPKeyBin() * @since 2.4.0 */ HCIStatusCode uploadKeys() noexcept; /** * Convenient combination of setSMPKeyBin() and uploadKeys() * after validating given SMPKeyBin file and SMPKeyBin::getSecLevel() > req_min_level. * @param bin the SMPKeyBin file * @param req_min_level SMPKeyBin::getSecLevel() shall be greater or equal to this required minimum * @return ::HCIStatusCode::SUCCESS if successful, otherwise the appropriate error code. * @see setSMPKeyBin() * @see uploadKeys() * @since 2.4.0 */ HCIStatusCode uploadKeys(const SMPKeyBin& bin, const BTSecurityLevel req_min_level) noexcept { if( bin.isValid() && bin.getSecLevel() >= req_min_level && setSMPKeyBin(bin) ) { return uploadKeys(); } else { return HCIStatusCode::INVALID_PARAMS; } } /** * Convenient combination of SMPKeyBin::read(), setSMPKeyBin() and uploadKeys() * after validating given SMPKeyBin file and SMPKeyBin::getSecLevel() > req_min_level. * @param smp_key_bin_path director for the SMPKeyBin file, derived by this BTDevice * @param req_min_level SMPKeyBin::getSecLevel() shall be greater or equal to this required minimum * @return ::HCIStatusCode::SUCCESS if successful, otherwise the appropriate error code. * @see SMPKeyBin::read() * @see setSMPKeyBin() * @see uploadKeys() * @since 2.4.0 */ HCIStatusCode uploadKeys(const std::string& smp_key_bin_path, const BTSecurityLevel req_min_level, const bool verbose_) noexcept { return uploadKeys(SMPKeyBin::read(smp_key_bin_path, *this, verbose_), req_min_level); } /** * Returns a copy of the Long Term Key (LTK), valid after connection and SMP pairing has been completed. * @param responder true will return the responder's LTK info (remote device, LL slave), otherwise the initiator's (the LL master). * @return the resulting key. SMPLongTermKeyInfo::enc_size will be zero if invalid. * @see ::SMPPairingState::COMPLETED * @see AdapterStatusListener::deviceReady() */ SMPLongTermKey getLongTermKey(const bool responder) const noexcept; /** * Sets the Long Term Key (LTK) of this device for pre-paired encryption. * * Issue uploadKeys() to upload all SMP keys to the adapter * before connecting to enable pre-pairing. * * @param ltk the pre-paired encryption LTK * @see setSMPKeyBin() * @see uploadKeys() * @since 2.4.0 */ void setLongTermKey(const SMPLongTermKey& ltk) noexcept; /** * Returns a copy of the Identity Resolving Key (IRK), valid after connection and SMP pairing has been completed. * @param responder true will return the responder's IRK info (remote device, LL slave), otherwise the initiator's (the LL master). * @return the resulting key * @see ::SMPPairingState::COMPLETED * @see AdapterStatusListener::deviceReady() */ SMPIdentityResolvingKey getIdentityResolvingKey(const bool responder) const noexcept; /** * Sets the Identity Resolving Key (IRK) of this device for pre-paired encryption. * * Issue uploadKeys() to upload all SMP keys to the adapter * before connecting to enable pre-pairing. * * @param irk the Identity Resolving Key (IRK) * @see setSMPKeyBin() * @see uploadKeys() * @since 2.4.0 */ void setIdentityResolvingKey(const SMPIdentityResolvingKey& irk) noexcept; /** * Returns a copy of the Signature Resolving Key (CSRK), valid after connection and SMP pairing has been completed. * @param responder true will return the responder's CSRK info (remote device, LL slave), otherwise the initiator's (the LL master). * @return the resulting key * @see ::SMPPairingState::COMPLETED * @see AdapterStatusListener::deviceReady() */ SMPSignatureResolvingKey getSignatureResolvingKey(const bool responder) const noexcept; /** * Sets the Signature Resolving Key (CSRK) of this device for pre-paired encryption. * * Issue uploadKeys() to upload all SMP keys to the adapter * before connecting to enable pre-pairing. * * @param csrk the Signature Resolving Key (CSRK) * @see setSMPKeyBin() * @see uploadKeys() * @since 2.4.0 */ void setSignatureResolvingKey(const SMPSignatureResolvingKey& csrk) noexcept; /** * Returns a copy of the Link Key (LK), valid after connection and SMP pairing has been completed. * @param responder true will return the responder's LTK info (remote device, LL slave), otherwise the initiator's (the LL master). * @return the resulting key * @see ::SMPPairingState::COMPLETED * @see AdapterStatusListener::deviceReady() * @since 2.4.0 */ SMPLinkKey getLinkKey(const bool responder) const noexcept; /** * Sets the Link Key (LK) of this device for pre-paired encryption. * * Issue uploadKeys() to upload all SMP keys to the adapter * before connecting to enable pre-pairing. * * @param lk the pre-paired encryption LK * @see setSMPKeyBin() * @see uploadKeys() * @since 2.4.0 */ void setLinkKey(const SMPLinkKey& lk) noexcept; /** * Unpair this device from the adapter while staying connected. *

* All keys will be cleared within the adapter and host implementation.
* Should rarely being used by user.
* Internally being used to re-start pairing if GATT connection fails * in PairingMode::PRE_PAIRED mode. *

* * Unpair is performed by directly for a consistent and stable security workflow: * - when a BTRole::Slave BTDevice is discovered, see AdapterStatusListener::deviceFound(). * - when a BTRole::Slave BTDevice is disconnected, see AdapterStatusListener::deviceDisconnected(). * - when a BTRole::Master BTDevice gets connected, see AdapterStatusListener::deviceConnected(). * * @return HCIStatusCode::SUCCESS or an appropriate error status. * @see AdapterStatusListener::deviceFound() * @see AdapterStatusListener::deviceDisconnected() * @see AdapterStatusListener::deviceConnected() */ HCIStatusCode unpair() noexcept; /** * Return the ::BTSecurityLevel, determined when the connection is established. * @see ::BTSecurityLevel * @see ::SMPIOCapability * @see getConnIOCapability() * @see setConnSecurity() * @see setConnSecurityAuto() */ BTSecurityLevel getConnSecurityLevel() const noexcept; /** * Return the set ::SMPIOCapability value, determined when the connection is established. * @see ::BTSecurityLevel * @see ::SMPIOCapability * @see getConnSecurityLevel() * @see setConnSecurity() * @see setConnSecurityAuto() */ SMPIOCapability getConnIOCapability() const noexcept; /** * Sets the given ::BTSecurityLevel and ::SMPIOCapability used to connect to this device on the upcoming connection. * * Implementation using following pseudo-code, validating the user settings: * 
             *   if( BTSecurityLevel::UNSET < sec_level && SMPIOCapability::UNSET != io_cap ) {
             *      USING: sec_level, io_cap
             *   } else if( BTSecurityLevel::UNSET < sec_level ) {
             *       if( BTSecurityLevel::ENC_ONLY >= sec_level ) {
             *           USING: sec_level, SMPIOCapability::NO_INPUT_NO_OUTPUT
             *       } else {
             *           USING: sec_level, SMPIOCapability::UNSET
             *       }
             *   } else if( SMPIOCapability::UNSET != io_cap ) {
             *       USING BTSecurityLevel::UNSET, io_cap
             *   } else {
             *       USING BTSecurityLevel::UNSET, SMPIOCapability::UNSET
             *   }
             *
*

* Method returns false if this device has already being connected, * or BTDevice::connectLE() or BTDevice::connectBREDR() has been issued already. *

*

* Method either changes both parameter for the upcoming connection or none at all. *

* @param[in] sec_level ::BTSecurityLevel to be applied. * @param[in] io_cap ::SMPIOCapability to be applied. * @see ::BTSecurityLevel * @see ::SMPIOCapability * @see getConnSecurityLevel() * @see getConnIOCapability() * @see setConnSecurityAuto() */ bool setConnSecurity(const BTSecurityLevel sec_level, const SMPIOCapability io_cap=SMPIOCapability::UNSET) noexcept; /** * Set automatic security negotiation of BTSecurityLevel and SMPIOCapability pairing mode. *

* Disabled by default and if set to ::SMPIOCapability::UNSET *

* Implementation iterates through below setup from highest security to lowest, * while performing a full connection attempt for each. * 
             * BTSecurityLevel::ENC_AUTH_FIPS, iocap_auto*
             * BTSecurityLevel::ENC_AUTH,      iocap_auto*
             * BTSecurityLevel::ENC_ONLY,      SMPIOCapability::NO_INPUT_NO_OUTPUT
             * BTSecurityLevel::NONE,          SMPIOCapability::NO_INPUT_NO_OUTPUT
             *
             * (*): user SMPIOCapability choice of for authentication IO, skipped if ::SMPIOCapability::NO_INPUT_NO_OUTPUT
             *
*

* Implementation may perform multiple connection and disconnect actions * until successful pairing or failure. *

*

* Intermediate AdapterStatusListener::deviceConnected() and AdapterStatusListener::deviceDisconnected() * callbacks are not delivered while negotiating. This avoids any interference by the user application. *

* @param auth_io_cap user SMPIOCapability choice for negotiation * @see isConnSecurityAutoEnabled() * @see ::BTSecurityLevel * @see ::SMPIOCapability * @see setConnSecurity() */ bool setConnSecurityAuto(const SMPIOCapability iocap_auto) noexcept; /** * Returns true if automatic security negotiation has been enabled via setConnSecurityAuto(), * otherwise false. * @see setConnSecurityAuto() */ bool isConnSecurityAutoEnabled() const noexcept; /** * Method sets the given passkey entry, see ::PairingMode::PASSKEY_ENTRY_ini. *

* Call this method if the device shall be securely paired with ::PairingMode::PASSKEY_ENTRY_ini, * i.e. when notified via AdapterStatusListener::devicePairingState() in state ::SMPPairingState::PASSKEY_EXPECTED. *

* * @param passkey used for ::PairingMode::PASSKEY_ENTRY_ini method. * Will be encrypted before sending to counter-party. * * @return HCIStatusCode::SUCCESS if the command has been accepted, otherwise ::HCIStatusCode may disclose reason for rejection. * @see PairingMode * @see SMPPairingState * @see AdapterStatusListener::devicePairingState() * @see setPairingPasskey() * @see setPairingNumericComparison() * @see getPairingMode() * @see getPairingState() */ HCIStatusCode setPairingPasskey(const uint32_t passkey) noexcept; /** * Method replies with a negative passkey response, i.e. rejection, see ::PairingMode::PASSKEY_ENTRY_ini. *

* You may call this method if the device shall be securely paired with ::PairingMode::PASSKEY_ENTRY_ini, * i.e. when notified via AdapterStatusListener::devicePairingState() in state ::SMPPairingState::PASSKEY_EXPECTED. *

*

* Current experience exposed a roughly 3s immediate disconnect handshake with certain devices and/or Kernel BlueZ code. * * Hence using setPairingPasskey() with `passkey = 0` is recommended, especially when utilizing * automatic security negotiation via setConnSecurityAuto()! *

* * @return HCIStatusCode::SUCCESS if the command has been accepted, otherwise ::HCIStatusCode may disclose reason for rejection. * @see PairingMode * @see SMPPairingState * @see AdapterStatusListener::devicePairingState() * @see setPairingPasskey() * @see setPairingNumericComparison() * @see getPairingMode() * @see getPairingState() */ HCIStatusCode setPairingPasskeyNegative() noexcept; /** * Method sets the numeric comparison result, see ::PairingMode::NUMERIC_COMPARE_ini. *

* Call this method if the device shall be securely paired with ::PairingMode::NUMERIC_COMPARE_ini, * i.e. when notified via AdapterStatusListener::devicePairingState() in state ::SMPPairingState::NUMERIC_COMPARE_EXPECTED. *

* * @param equal used for ::PairingMode::NUMERIC_COMPARE_ini method. * Will be encrypted before sending to counter-party. * * @return HCIStatusCode::SUCCESS if the command has been accepted, otherwise ::HCIStatusCode may disclose reason for rejection. * @see PairingMode * @see SMPPairingState * @see AdapterStatusListener::devicePairingState() * @see setPairingPasskey() * @see setPairingNumericComparison() * @see getPairingMode() * @see getPairingState() */ HCIStatusCode setPairingNumericComparison(const bool equal) noexcept; /** * Returns the current ::PairingMode used by the device. *

* If the device is not paired, the current mode is ::PairingMode::NONE. *

*

* If the Pairing Feature Exchange is completed, i.e. ::SMPPairingState::FEATURE_EXCHANGE_COMPLETED, * as notified by AdapterStatusListener::devicePairingState(), * the current mode reflects the currently used PairingMode. *

*

* In case the Pairing Feature Exchange is in progress, the current mode is ::PairingMode::NEGOTIATING. *

* @return current ::PairingMode. * @see PairingMode * @see SMPPairingState * @see AdapterStatusListener::devicePairingState() * @see setPairingPasskey() * @see setPairingNumericComparison() * @see getPairingMode() * @see getPairingState() */ PairingMode getPairingMode() const noexcept; /** * Returns the current ::SMPPairingState. *

* If the device is not paired, the current state is ::SMPPairingState::NONE. *

* @see PairingMode * @see SMPPairingState * @see AdapterStatusListener::devicePairingState() * @see setPairingPasskey() * @see setPairingNumericComparison() * @see getPairingMode() * @see getPairingState() */ SMPPairingState getPairingState() const noexcept; /** * Disconnects this device via disconnect(..) if getConnected()==true * and explicitly removes its shared references from the Adapter: * connected-devices, discovered-devices and shared-devices. *

* All added AdapterStatusListener associated with this instance * will be removed via BTAdapter::removeAllStatusListener(). *

*

* This method shall be issued to ensure no device reference will * be leaked in a long lived adapter, * as only its reference within connected-devices and discovered-devices are removed at disconnect. *

*

* After calling this method, this instance is destroyed and shall not be used anymore! *

*

* This method is an atomic operation. *

*

* An application using one thread per device and rapid connect, should either use disconnect() or remove(), * but never issue remove() after disconnect() if the device is in use. *

* @see BTAdapter::removeAllStatusListener() */ void remove() noexcept; /** * Returns the connected GATTHandler or nullptr, see connectGATT(), getGattServices() and disconnect(). * * @return * @see connectGATT() * @see getGattServices() * @see disconnect() */ std::shared_ptr getGattHandler() noexcept; /** * Returns a list of shared GATTService available on this device if successful, * otherwise returns an empty list if an error occurred. * * Method is only functional on a remote BTDevice in BTRole::Slave, a GATT server (GATTRole::Server), * i.e. the local BTAdapter acting as a BTRole::Master GATT client. * * The HCI connectLE(..) or connectBREDR(..) must be performed first, see {@link #connectDefault()}. * * If this method has been called for the first time or no services have been detected yet: * - the client MTU exchange will be performed * - a list of GATTService will be retrieved * * A GATT connection will be created via connectGATT() if not established yet. */ jau::darray getGattServices() noexcept; /** * Returns the shared GenericAccess instance, retrieved by getGattServices() or nullptr if not available. * * @return * @see getGattServices() */ std::shared_ptr getGattGenericAccess(); /** * Find a BTGattService by its service_uuid. * * It will check objects of a connected device using getGattServices(). * * It will not turn on discovery or connect to this remote device. * * @parameter service_uuid the jau::uuid_t of the desired BTGattService * @return The matching service or null if not found * @see findGattChar() */ BTGattServiceRef findGattService(const jau::uuid_t& service_uuid) noexcept; /** * Find a BTGattChar by its service_uuid and char_uuid. * * It will check objects of this connected device using getGattServices(). * * It will not turn on discovery or connect to this remote device. * * @parameter service_uuid the jau::uuid_t of the intermediate BTGattService * @parameter char_uuid the jau::uuid_t of the desired BTGattChar, within the intermediate BTGattService. * @return The matching characteristic or null if not found * @since 2.4.0 * @see findGattService() */ BTGattCharRef findGattChar(const jau::uuid_t& service_uuid, const jau::uuid_t& char_uuid) noexcept; /** * Find a BTGattChar by its char_uuid only. * * It will check objects of this connected device using getGattServices(). * * It will not turn on discovery or connect to this remote device. * * This variation is less efficient than findGattChar() by service_uuid and char_uuid, * since it has to traverse through all services. * * @parameter char_uuid the jau::uuid_t of the desired BTGattChar, within the intermediate BTGattService. * @return The matching characteristic or null if not found * @since 2.4.0 * @see findGattService() */ BTGattCharRef findGattChar(const jau::uuid_t& char_uuid) noexcept; /** * Send a notification event consisting out of the given `value` representing the given characteristic value handle * to the connected BTRole::Master. * * This command is only valid if this BTGattHandler is in role GATTRole::Server. * * Implementation is not receiving any reply after sending out the indication and returns immediately. * * @param char_value_handle valid characteristic value handle, must be sourced from referenced DBGattServer * @param value the octets to be send * @return true if successful, otherwise false */ bool sendNotification(const uint16_t char_value_handle, const jau::TROOctets & value) noexcept; /** * Send an indication event consisting out of the given `value` representing the given characteristic value handle * to the connected BTRole::Master. * * This command is only valid if this BTGattHandler is in role GATTRole::Server. * * Implementation awaits the indication reply after sending out the indication. * * @param char_value_handle valid characteristic value handle, must be sourced from referenced DBGattServer * @param value the octets to be send * @return true if successful, otherwise false */ bool sendIndication(const uint16_t char_value_handle, const jau::TROOctets & value) noexcept; /** * Issues a GATT ping to the device, validating whether it is still reachable. *

* This method could be periodically utilized to shorten the underlying OS disconnect period * after turning the device off, which lies within 7-13s. *

*

* In case the device is no more reachable, the GATTHandler will initiate disconnect due to the occurring IO error. * A disconnect will finally being issued. *

*

* GATT services must have been initialized via getGattServices(), otherwise `false` is being returned. *

* @return `true` if successful, otherwise false in case no GATT services exists or is not connected .. etc. */ bool pingGATT() noexcept; /** * Add the given BTGattCharListener to the listener list if not already present. *

* Convenience delegation call to GATTHandler *

*

* To enable the actual BLE notification and/or indication, one needs to call * BTGattChar::configNotificationIndication(bool, bool, bool[]) * or BTGattChar::enableNotificationOrIndication(bool enabledState[2]). *

* @param listener A BTGattCharListener instance, listening to all BluetoothGattCharacteristic events of this device * @return true if the given listener is not element of the list and has been newly added, otherwise false. * @throws IllegalStateException if the GATTHandler is null, i.e. not connected */ bool addCharListener(std::shared_ptr l); /** * Remove the given {@link BTGattCharListener} from the listener list. *

* If the GATTHandler is null, i.e. not connected, `false` is being returned. *

* @param listener A {@link BTGattCharListener} instance * @return true if the given listener is an element of the list and has been removed, otherwise false. */ bool removeCharListener(std::shared_ptr l) noexcept; /** * Remove all {@link BTGattCharListener} from the list, which are associated to the given {@link BTGattChar}. *

* Implementation tests all listener's BTGattCharListener::match(const BTGattChar & characteristic) * to match with the given associated characteristic. *

* @param associatedCharacteristic the match criteria to remove any BTGattCharListener from the list * @return number of removed listener. */ int removeAllAssociatedCharListener(std::shared_ptr associatedCharacteristic) noexcept; int removeAllAssociatedCharListener(const BTGattChar * associatedCharacteristic) noexcept; /** * Remove all {@link BTGattCharListener} from the list. * @return number of removed listener. */ int removeAllCharListener() noexcept; }; inline bool operator==(const BTDevice& lhs, const BTDevice& rhs) noexcept { return lhs.getAddressAndType() == rhs.getAddressAndType(); } inline bool operator!=(const BTDevice& lhs, const BTDevice& rhs) noexcept { return !(lhs == rhs); } typedef std::shared_ptr BTDeviceRef; } // namespace direct_bt #endif /* BT_DEVICE_HPP_ */