Wang Xinglu
High level Bluetooth Low Energy API and radio abstraction layer
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BLE_API
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Bluetooth Low Energy
Diff: public/Gap.h
- Revision:
- 714:a6130aaa0fd9
diff -r 9f4251b3355c -r a6130aaa0fd9 public/Gap.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/public/Gap.h Thu Jul 02 09:06:11 2015 +0100
@@ -0,0 +1,398 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __GAP_H__
+#define __GAP_H__
+
+#include "GapAdvertisingData.h"
+#include "GapAdvertisingParams.h"
+#include "GapEvents.h"
+#include "CallChain.h"
+#include "FunctionPointerWithContext.h"
+
+using namespace mbed;
+
+class GapScanningParams; /* forward declaration */
+
+class Gap {
+public:
+ enum AddressType_t {
+ ADDR_TYPE_PUBLIC = 0,
+ ADDR_TYPE_RANDOM_STATIC,
+ ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE,
+ ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE
+ };
+ typedef enum AddressType_t addr_type_t; /* @Note: deprecated. Use AddressType_t instead. */
+
+ static const unsigned ADDR_LEN = 6;
+ typedef uint8_t Address_t[ADDR_LEN]; /* 48-bit address, LSB format. */
+ typedef Address_t address_t; /* @Note: deprecated. Use Address_t instead. */
+
+ enum AdvertisementType_t {
+ ADV_IND = 0x00, /**< Connectable undirected. */
+ ADV_DIRECT_IND = 0x01, /**< Connectable directed. */
+ ADV_SCAN_IND = 0x02, /**< Scannable undirected. */
+ ADV_NONCONN_IND = 0x03, /**< Non connectable undirected. */
+ };
+
+ /**
+ * Enumeration for disconnection reasons. The values for these reasons are
+ * derived from Nordic's implementation; but the reasons are meant to be
+ * independent of the transport. If you are returned a reason which is not
+ * covered by this enumeration, then please refer to the underlying
+ * transport library.
+ */
+ enum DisconnectionReason_t {
+ REMOTE_USER_TERMINATED_CONNECTION = 0x13,
+ LOCAL_HOST_TERMINATED_CONNECTION = 0x16,
+ CONN_INTERVAL_UNACCEPTABLE = 0x3B,
+ };
+
+ /* Describes the current state of the device (more than one bit can be set) */
+ struct GapState_t {
+ unsigned advertising : 1; /**< peripheral is currently advertising */
+ unsigned connected : 1; /**< peripheral is connected to a central */
+ };
+
+ typedef uint16_t Handle_t;
+
+ typedef struct {
+ uint16_t minConnectionInterval; /**< Minimum Connection Interval in 1.25 ms units, see @ref BLE_GAP_CP_LIMITS.*/
+ uint16_t maxConnectionInterval; /**< Maximum Connection Interval in 1.25 ms units, see @ref BLE_GAP_CP_LIMITS.*/
+ uint16_t slaveLatency; /**< Slave Latency in number of connection events, see @ref BLE_GAP_CP_LIMITS.*/
+ uint16_t connectionSupervisionTimeout; /**< Connection Supervision Timeout in 10 ms units, see @ref BLE_GAP_CP_LIMITS.*/
+ } ConnectionParams_t;
+
+ enum SecurityMode_t {
+ SECURITY_MODE_NO_ACCESS,
+ SECURITY_MODE_ENCRYPTION_OPEN_LINK, /**< require no protection, open link. */
+ SECURITY_MODE_ENCRYPTION_NO_MITM, /**< require encryption, but no MITM protection. */
+ SECURITY_MODE_ENCRYPTION_WITH_MITM, /**< require encryption and MITM protection. */
+ SECURITY_MODE_SIGNED_NO_MITM, /**< require signing or encryption, but no MITM protection. */
+ SECURITY_MODE_SIGNED_WITH_MITM, /**< require signing or encryption, and MITM protection. */
+ };
+
+ /**
+ * @brief Defines possible security status/states.
+ *
+ * @details Defines possible security status/states of a link when requested by getLinkSecurity().
+ */
+ enum LinkSecurityStatus_t {
+ NOT_ENCRYPTED, /**< The link is not secured. */
+ ENCRYPTION_IN_PROGRESS, /**< Link security is being established.*/
+ ENCRYPTED /**< The link is secure.*/
+ };
+
+ enum SecurityIOCapabilities_t {
+ IO_CAPS_DISPLAY_ONLY = 0x00, /**< Display Only. */
+ IO_CAPS_DISPLAY_YESNO = 0x01, /**< Display and Yes/No entry. */
+ IO_CAPS_KEYBOARD_ONLY = 0x02, /**< Keyboard Only. */
+ IO_CAPS_NONE = 0x03, /**< No I/O capabilities. */
+ IO_CAPS_KEYBOARD_DISPLAY = 0x04, /**< Keyboard and Display. */
+ };
+
+ enum SecurityCompletionStatus_t {
+ SEC_STATUS_SUCCESS = 0x00, /**< Procedure completed with success. */
+ SEC_STATUS_TIMEOUT = 0x01, /**< Procedure timed out. */
+ SEC_STATUS_PDU_INVALID = 0x02, /**< Invalid PDU received. */
+ SEC_STATUS_PASSKEY_ENTRY_FAILED = 0x81, /**< Passkey entry failed (user canceled or other). */
+ SEC_STATUS_OOB_NOT_AVAILABLE = 0x82, /**< Out of Band Key not available. */
+ SEC_STATUS_AUTH_REQ = 0x83, /**< Authentication requirements not met. */
+ SEC_STATUS_CONFIRM_VALUE = 0x84, /**< Confirm value failed. */
+ SEC_STATUS_PAIRING_NOT_SUPP = 0x85, /**< Pairing not supported. */
+ SEC_STATUS_ENC_KEY_SIZE = 0x86, /**< Encryption key size. */
+ SEC_STATUS_SMP_CMD_UNSUPPORTED = 0x87, /**< Unsupported SMP command. */
+ SEC_STATUS_UNSPECIFIED = 0x88, /**< Unspecified reason. */
+ SEC_STATUS_REPEATED_ATTEMPTS = 0x89, /**< Too little time elapsed since last attempt. */
+ SEC_STATUS_INVALID_PARAMS = 0x8A, /**< Invalid parameters. */
+ };
+
+ /**
+ * Declaration of type containing a passkey to be used during pairing. This
+ * is passed into initializeSecurity() to specify a pre-programmed passkey
+ * for authentication instead of generating a random one.
+ */
+ static const unsigned PASSKEY_LEN = 6;
+ typedef uint8_t Passkey_t[PASSKEY_LEN]; /**< 6-digit passkey in ASCII ('0'-'9' digits only). */
+
+ static const uint16_t UNIT_1_25_MS = 1250; /**< Number of microseconds in 1.25 milliseconds. */
+ static const uint16_t UNIT_0_625_MS = 625; /**< Number of microseconds in 0.625 milliseconds. */
+ static uint16_t MSEC_TO_GAP_DURATION_UNITS(uint32_t durationInMillis) {
+ return (durationInMillis * 1000) / UNIT_1_25_MS;
+ }
+ static uint16_t MSEC_TO_ADVERTISEMENT_DURATION_UNITS(uint32_t durationInMillis) {
+ return (durationInMillis * 1000) / UNIT_0_625_MS;
+ }
+ static uint16_t ADVERTISEMENT_DURATION_UNITS_TO_MS(uint16_t gapUnits) {
+ return (gapUnits * UNIT_0_625_MS) / 1000;
+ }
+
+ typedef void (*EventCallback_t)(void);
+ typedef void (*ConnectionEventCallback_t)(Handle_t,
+ AddressType_t peerAddrType, const Address_t peerAddr,
+ AddressType_t ownAddrType, const Address_t ownAddr,
+ const ConnectionParams_t *);
+ typedef void (*HandleSpecificEvent_t)(Handle_t handle);
+ typedef void (*DisconnectionEventCallback_t)(Handle_t, DisconnectionReason_t);
+ typedef void (*RadioNotificationEventCallback_t) (bool radio_active); /* gets passed true for ACTIVE; false for INACTIVE. */
+ typedef void (*SecuritySetupInitiatedCallback_t)(Handle_t, bool allowBonding, bool requireMITM, SecurityIOCapabilities_t iocaps);
+ typedef void (*SecuritySetupCompletedCallback_t)(Handle_t, SecurityCompletionStatus_t status);
+ typedef void (*LinkSecuredCallback_t)(Handle_t handle, SecurityMode_t securityMode);
+ typedef void (*PasskeyDisplayCallback_t)(Handle_t handle, const Passkey_t passkey);
+
+ struct AdvertisementCallbackParams_t {
+ Address_t peerAddr;
+ int8_t rssi;
+ bool isScanResponse;
+ AdvertisementType_t type;
+ uint8_t advertisingDataLen;
+ const uint8_t *advertisingData;
+ };
+ typedef FunctionPointerWithContext<const AdvertisementCallbackParams_t *> AdvertisementReportCallback_t;
+
+ friend class BLEDevice;
+
+private:
+ /* These functions must be defined in the sub-class */
+ virtual ble_error_t setAddress(AddressType_t type, const Address_t address) = 0;
+ virtual ble_error_t getAddress(AddressType_t *typeP, Address_t address) = 0;
+ virtual ble_error_t setAdvertisingData(const GapAdvertisingData &, const GapAdvertisingData &) = 0;
+ virtual ble_error_t startAdvertising(const GapAdvertisingParams &) = 0;
+ virtual ble_error_t stopAdvertising(void) = 0;
+ virtual ble_error_t stopScan() = 0;
+ virtual uint16_t getMinAdvertisingInterval(void) const = 0;
+ virtual uint16_t getMinNonConnectableAdvertisingInterval(void) const = 0;
+ virtual uint16_t getMaxAdvertisingInterval(void) const = 0;
+ virtual ble_error_t disconnect(DisconnectionReason_t reason) = 0;
+ virtual ble_error_t getPreferredConnectionParams(ConnectionParams_t *params) = 0;
+ virtual ble_error_t setPreferredConnectionParams(const ConnectionParams_t *params) = 0;
+ virtual ble_error_t updateConnectionParams(Handle_t handle, const ConnectionParams_t *params) = 0;
+
+ virtual ble_error_t purgeAllBondingState(void) = 0;
+ virtual ble_error_t getLinkSecurity(Handle_t connectionHandle, LinkSecurityStatus_t *securityStatusP) = 0;
+
+ virtual ble_error_t setDeviceName(const uint8_t *deviceName) = 0;
+ virtual ble_error_t getDeviceName(uint8_t *deviceName, unsigned *lengthP) = 0;
+ virtual ble_error_t setAppearance(uint16_t appearance) = 0;
+ virtual ble_error_t getAppearance(uint16_t *appearanceP) = 0;
+
+ ble_error_t startScan(const GapScanningParams &scanningParams, void (*callback)(const AdvertisementCallbackParams_t *params)) {
+ ble_error_t err = BLE_ERROR_NONE;
+ if (callback) {
+ if ((err = startRadioScan(scanningParams)) == BLE_ERROR_NONE) {
+ onAdvertisementReport.attach(callback);
+ }
+ }
+
+ return err;
+ }
+
+ template<typename T>
+ ble_error_t startScan(const GapScanningParams &scanningParams, T *object, void (T::*callbackMember)(const AdvertisementCallbackParams_t *params)) {
+ ble_error_t err = BLE_ERROR_NONE;
+ if (object && callbackMember) {
+ if ((err = startRadioScan(scanningParams)) == BLE_ERROR_NONE) {
+ onAdvertisementReport.attach(object, callbackMember);
+ }
+ }
+
+ return err;
+ }
+
+protected:
+ virtual ble_error_t startRadioScan(const GapScanningParams &scanningParams) = 0;
+
+ /* Event callback handlers */
+ void setOnTimeout(EventCallback_t callback) {onTimeout = callback;}
+ void setOnConnection(ConnectionEventCallback_t callback) {onConnection = callback;}
+
+ /**
+ * Set the application callback for disconnection events.
+ * @param callback
+ * Pointer to the unique callback.
+ */
+ void setOnDisconnection(DisconnectionEventCallback_t callback) {onDisconnection = callback;}
+
+ /**
+ * Set the application callback for radio-notification events.
+ * @param callback
+ * Handler to be executed in response to a radio notification event.
+ */
+ virtual void setOnRadioNotification(RadioNotificationEventCallback_t callback) {onRadioNotification = callback;}
+
+ /**
+ * To indicate that security procedure for link has started.
+ */
+ virtual void setOnSecuritySetupInitiated(SecuritySetupInitiatedCallback_t callback) {onSecuritySetupInitiated = callback;}
+
+ /**
+ * To indicate that security procedure for link has completed.
+ */
+ virtual void setOnSecuritySetupCompleted(SecuritySetupCompletedCallback_t callback) {onSecuritySetupCompleted = callback;}
+
+ /**
+ * To indicate that link with the peer is secured. For bonded devices,
+ * subsequent re-connections with bonded peer will result only in this callback
+ * when the link is secured and setup procedures will not occur unless the
+ * bonding information is either lost or deleted on either or both sides.
+ */
+ virtual void setOnLinkSecured(LinkSecuredCallback_t callback) {onLinkSecured = callback;}
+
+ /**
+ * To indicate that device context is stored persistently.
+ */
+ virtual void setOnSecurityContextStored(HandleSpecificEvent_t callback) {onSecurityContextStored = callback;}
+
+ /**
+ * To set the callback for when the passkey needs to be displayed on a peripheral with DISPLAY capability.
+ */
+ virtual void setOnPasskeyDisplay(PasskeyDisplayCallback_t callback) {onPasskeyDisplay = callback;}
+
+ /**
+ * Append to a chain of callbacks to be invoked upon disconnection; these
+ * callbacks receive no context and are therefore different from the
+ * onDisconnection callback.
+ * @param callback
+ * function pointer to be invoked upon disconnection; receives no context.
+ *
+ * @note the disconnection CallChain should have been merged with
+ * onDisconnctionCallback; but this was not possible because
+ * FunctionPointer (which is a building block for CallChain) doesn't
+ * accept variadic templates.
+ */
+ template<typename T>
+ void addToDisconnectionCallChain(T *tptr, void (T::*mptr)(void)) {disconnectionCallChain.add(tptr, mptr);}
+
+private:
+ GapState_t getState(void) const {
+ return state;
+ }
+
+protected:
+ Gap() :
+ state(),
+ onTimeout(NULL),
+ onConnection(NULL),
+ onDisconnection(NULL),
+ onRadioNotification(),
+ onSecuritySetupInitiated(),
+ onSecuritySetupCompleted(),
+ onLinkSecured(),
+ onSecurityContextStored(),
+ onPasskeyDisplay(),
+ onAdvertisementReport(),
+ disconnectionCallChain() {
+ /* empty */
+ }
+
+public:
+ void processConnectionEvent(Handle_t handle, AddressType_t peerAddrType, const Address_t peerAddr, AddressType_t ownAddrType, const Address_t ownAddr, const ConnectionParams_t *params) {
+ state.connected = 1;
+ if (onConnection) {
+ onConnection(handle, peerAddrType, peerAddr, ownAddrType, ownAddr, params);
+ }
+ }
+
+ void processDisconnectionEvent(Handle_t handle, DisconnectionReason_t reason) {
+ state.connected = 0;
+ if (onDisconnection) {
+ onDisconnection(handle, reason);
+ }
+ disconnectionCallChain.call();
+ }
+
+ void processSecuritySetupInitiatedEvent(Handle_t handle, bool allowBonding, bool requireMITM, SecurityIOCapabilities_t iocaps) {
+ if (onSecuritySetupInitiated) {
+ onSecuritySetupInitiated(handle, allowBonding, requireMITM, iocaps);
+ }
+ }
+
+ void processSecuritySetupCompletedEvent(Handle_t handle, SecurityCompletionStatus_t status) {
+ if (onSecuritySetupCompleted) {
+ onSecuritySetupCompleted(handle, status);
+ }
+ }
+
+ void processLinkSecuredEvent(Handle_t handle, SecurityMode_t securityMode) {
+ if (onLinkSecured) {
+ onLinkSecured(handle, securityMode);
+ }
+ }
+
+ void processSecurityContextStoredEvent(Handle_t handle) {
+ if (onSecurityContextStored) {
+ onSecurityContextStored(handle);
+ }
+ }
+
+ void processPasskeyDisplayEvent(Handle_t handle, const Passkey_t passkey) {
+ if (onPasskeyDisplay) {
+ onPasskeyDisplay(handle, passkey);
+ }
+ }
+
+ void processAdvertisementReport(const Address_t peerAddr,
+ int8_t rssi,
+ bool isScanResponse,
+ AdvertisementType_t type,
+ uint8_t advertisingDataLen,
+ const uint8_t *advertisingData) {
+ AdvertisementCallbackParams_t params;
+ memcpy(params.peerAddr, peerAddr, ADDR_LEN);
+ params.rssi = rssi;
+ params.isScanResponse = isScanResponse;
+ params.type = type;
+ params.advertisingDataLen = advertisingDataLen;
+ params.advertisingData = advertisingData;
+ onAdvertisementReport.call(¶ms);
+ }
+
+ void processEvent(GapEvents::gapEvent_e type) {
+ switch (type) {
+ case GapEvents::GAP_EVENT_TIMEOUT:
+ state.advertising = 0;
+ if (onTimeout) {
+ onTimeout();
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+protected:
+ GapState_t state;
+
+protected:
+ EventCallback_t onTimeout;
+ ConnectionEventCallback_t onConnection;
+ DisconnectionEventCallback_t onDisconnection;
+ RadioNotificationEventCallback_t onRadioNotification;
+ SecuritySetupInitiatedCallback_t onSecuritySetupInitiated;
+ SecuritySetupCompletedCallback_t onSecuritySetupCompleted;
+ LinkSecuredCallback_t onLinkSecured;
+ HandleSpecificEvent_t onSecurityContextStored;
+ PasskeyDisplayCallback_t onPasskeyDisplay;
+ AdvertisementReportCallback_t onAdvertisementReport;
+ CallChain disconnectionCallChain;
+
+private:
+ /* disallow copy and assignment */
+ Gap(const Gap &);
+ Gap& operator=(const Gap &);
+};
+
+#endif // ifndef __GAP_H__
\ No newline at end of file