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/*
* Copyright (c) 2016, The OpenThread Authors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file
* This file includes definitions for non-volatile storage of settings.
*/
#ifndef SETTINGS_HPP_
#define SETTINGS_HPP_
#include "openthread-core-config.h"
#include "common/encoding.hpp"
#include "common/locator.hpp"
#include "common/non_copyable.hpp"
#include "mac/mac_types.hpp"
#include "utils/flash.hpp"
#if OPENTHREAD_CONFIG_IP6_SLAAC_ENABLE
#include "utils/slaac_address.hpp"
#endif
namespace ot {
namespace MeshCoP {
class Dataset;
}
class SettingsDriver : public InstanceLocator, private NonCopyable
{
public:
/**
* Constructor.
*/
explicit SettingsDriver(Instance &aInstance);
/**
* This method initializes the settings storage driver.
*
*/
void Init(void);
/**
* This method deinitializes the settings driver.
*
*/
void Deinit(void);
/**
* This method adds a value to @p aKey.
*
* @param[in] aKey The key associated with the value.
* @param[in] aValue A pointer to where the new value of the setting should be read from.
* MUST NOT be NULL if @p aValueLength is non-zero.
* @param[in] aValueLength The length of the data pointed to by @p aValue. May be zero.
*
* @retval OT_ERROR_NONE The value was added.
* @retval OT_ERROR_NO_BUFS Not enough space to store the value.
*
*/
otError Add(uint16_t aKey, const uint8_t *aValue, uint16_t aValueLength);
/**
* This method removes a value from @p aKey.
*
* @param[in] aKey The key associated with the value.
* @param[in] aIndex The index of the value to be removed.
* If set to -1, all values for @p aKey will be removed.
*
* @retval OT_ERROR_NONE The given key and index was found and removed successfully.
* @retval OT_ERROR_NOT_FOUND The given key or index was not found.
*
*/
otError Delete(uint16_t aKey, int aIndex);
/**
* This method fetches the value identified by @p aKey.
*
* @param[in] aKey The key associated with the requested value.
* @param[in] aIndex The index of the specific item to get.
* @param[out] aValue A pointer to where the value of the setting should be written.
* May be NULL if just testing for the presence or length of a key.
* @param[inout] aValueLength A pointer to the length of the value.
* When called, this should point to an integer containing the maximum bytes that
* can be written to @p aValue.
* At return, the actual length of the setting is written.
* May be NULL if performing a presence check.
*
* @retval OT_ERROR_NONE The value was fetched successfully.
* @retval OT_ERROR_NOT_FOUND The key was not found.
*
*/
otError Get(uint16_t aKey, int aIndex, uint8_t *aValue, uint16_t *aValueLength) const;
/**
* This method sets or replaces the value identified by @p aKey.
*
* If there was more than one value previously associated with @p aKey, then they are all deleted and replaced with
* this single entry.
*
* @param[in] aKey The key associated with the value.
* @param[in] aValue A pointer to where the new value of the setting should be read from.
* MUST NOT be NULL if @p aValueLength is non-zero.
* @param[in] aValueLength The length of the data pointed to by @p aValue. May be zero.
*
* @retval OT_ERROR_NONE The value was changed.
* @retval OT_ERROR_NO_BUFS Not enough space to store the value.
*
*/
otError Set(uint16_t aKey, const uint8_t *aValue, uint16_t aValueLength);
/**
* This method remves all values.
*
*/
void Wipe(void);
#if OPENTHREAD_CONFIG_PLATFORM_FLASH_API_ENABLE
private:
Flash mFlash;
#endif
};
/**
* This class defines the base class used by `Settings` and `Settings::ChildInfoIterator`.
*
* This class provides structure definitions for different settings keys.
*
*/
class SettingsBase : public InstanceLocator, private NonCopyable
{
public:
/**
* Rules for updating existing value structures.
*
* 1. Modifying existing key value fields in settings MUST only be
* done by appending new fields. Existing fields MUST NOT be
* deleted or modified in any way.
*
* 2. To support backward compatibility (rolling back to an older
* software version), code reading and processing key values MUST
* process key values that have longer length. Additionally, newer
* versions MUST update/maintain values in existing key value
* fields.
*
* 3. To support forward compatibility (rolling forward to a newer
* software version), code reading and processing key values MUST
* process key values that have shorter length.
*
* 4. New Key IDs may be defined in the future with the understanding
* that such key values are not backward compatible.
*
*/
/**
* This structure represents the device's own network information for settings storage.
*
*/
OT_TOOL_PACKED_BEGIN
class NetworkInfo
{
public:
/**
* This method clears the struct object (setting all the fields to zero).
*
*/
void Init(void)
{
memset(this, 0, sizeof(*this));
SetVersion(OT_THREAD_VERSION_1_1);
}
/**
* This method returns the Thread role.
*
* @returns The Thread role.
*
*/
uint8_t GetRole(void) const { return mRole; }
/**
* This method sets the Thread role.
*
* @param[in] aRole The Thread Role.
*
*/
void SetRole(uint8_t aRole) { mRole = aRole; }
/**
* This method returns the Thread device mode.
*
* @returns the Thread device mode.
*
*/
uint8_t GetDeviceMode(void) const { return mDeviceMode; }
/**
* This method sets the Thread device mode.
*
* @param[in] aDeviceMode The Thread device mode.
*
*/
void SetDeviceMode(uint8_t aDeviceMode) { mDeviceMode = aDeviceMode; }
/**
* This method returns the RLOC16.
*
* @returns The RLOC16.
*
*/
uint16_t GetRloc16(void) const { return Encoding::LittleEndian::HostSwap16(mRloc16); }
/**
* This method sets the RLOC16.
*
* @param[in] aRloc16 The RLOC16.
*
*/
void SetRloc16(uint16_t aRloc16) { mRloc16 = Encoding::LittleEndian::HostSwap16(aRloc16); }
/**
* This method returns the key sequence.
*
* @returns The key sequence.
*
*/
uint32_t GetKeySequence(void) const { return Encoding::LittleEndian::HostSwap32(mKeySequence); }
/**
* This method sets the key sequence.
*
* @param[in] aKeySequence The key sequence.
*
*/
void SetKeySequence(uint32_t aKeySequence) { mKeySequence = Encoding::LittleEndian::HostSwap32(aKeySequence); }
/**
* This method returns the MLE frame counter.
*
* @returns The MLE frame counter.
*
*/
uint32_t GetMleFrameCounter(void) const { return Encoding::LittleEndian::HostSwap32(mMleFrameCounter); }
/**
* This method sets the MLE frame counter.
*
* @param[in] aMleFrameCounter The MLE frame counter.
*
*/
void SetMleFrameCounter(uint32_t aMleFrameCounter)
{
mMleFrameCounter = Encoding::LittleEndian::HostSwap32(aMleFrameCounter);
}
/**
* This method returns the MAC frame counter.
*
* @returns The MAC frame counter.
*
*/
uint32_t GetMacFrameCounter(void) const { return Encoding::LittleEndian::HostSwap32(mMacFrameCounter); }
/**
* This method sets the MAC frame counter.
*
* @param[in] aMacFrameCounter The MAC frame counter.
*
*/
void SetMacFrameCounter(uint32_t aMacFrameCounter)
{
mMacFrameCounter = Encoding::LittleEndian::HostSwap32(aMacFrameCounter);
}
/**
* This method returns the previous partition ID.
*
* @returns The previous partition ID.
*
*/
uint32_t GetPreviousPartitionId(void) const { return Encoding::LittleEndian::HostSwap32(mPreviousPartitionId); }
/**
* This method sets the previous partition id.
*
* @param[in] aPreviousPartitionId The previous partition ID.
*
*/
void SetPreviousPartitionId(uint32_t aPreviousPartitionId)
{
mPreviousPartitionId = Encoding::LittleEndian::HostSwap32(aPreviousPartitionId);
}
/**
* This method returns the extended address.
*
* @returns The extended address.
*
*/
const Mac::ExtAddress &GetExtAddress(void) const { return mExtAddress; }
/**
* This method sets the extended address.
*
* @param[in] aExtAddress The extended address.
*
*/
void SetExtAddress(const Mac::ExtAddress &aExtAddress) { mExtAddress = aExtAddress; }
/**
* This method returns the Mesh Local Interface Identifier.
*
* @returns The Mesh Local Interface Identifier.
*
*/
const uint8_t *GetMeshLocalIid(void) const { return mMlIid; }
/**
* This method sets the Mesh Local Interface Identifier.
*
* @param[in] aMeshLocalIid The Mesh Local Interface Identifier.
*
*/
void SetMeshLocalIid(const uint8_t *aMeshLocalIid) { memcpy(mMlIid, aMeshLocalIid, sizeof(mMlIid)); }
/**
* This method returns the Thread version.
*
* @returns The Thread version.
*
*/
uint16_t GetVersion(void) const { return Encoding::LittleEndian::HostSwap16(mVersion); }
/**
* This method sets the Thread version.
*
* @param[in] aVersion The Thread version.
*
*/
void SetVersion(uint16_t aVersion) { mVersion = Encoding::LittleEndian::HostSwap16(aVersion); }
private:
uint8_t mRole; ///< Current Thread role.
uint8_t mDeviceMode; ///< Device mode setting.
uint16_t mRloc16; ///< RLOC16
uint32_t mKeySequence; ///< Key Sequence
uint32_t mMleFrameCounter; ///< MLE Frame Counter
uint32_t mMacFrameCounter; ///< MAC Frame Counter
uint32_t mPreviousPartitionId; ///< PartitionId
Mac::ExtAddress mExtAddress; ///< Extended Address
uint8_t mMlIid[OT_IP6_IID_SIZE]; ///< IID from ML-EID
uint16_t mVersion; ///< Version
} OT_TOOL_PACKED_END;
/**
* This structure represents the parent information for settings storage.
*
*/
OT_TOOL_PACKED_BEGIN
class ParentInfo
{
public:
/**
* This method clears the struct object (setting all the fields to zero).
*
*/
void Init(void)
{
memset(this, 0, sizeof(*this));
SetVersion(OT_THREAD_VERSION_1_1);
}
/**
* This method returns the extended address.
*
* @returns The extended address.
*
*/
const Mac::ExtAddress &GetExtAddress(void) const { return mExtAddress; }
/**
* This method sets the extended address.
*
* @param[in] aExtAddress The extended address.
*
*/
void SetExtAddress(const Mac::ExtAddress &aExtAddress) { mExtAddress = aExtAddress; }
/**
* This method returns the Thread version.
*
* @returns The Thread version.
*
*/
uint16_t GetVersion(void) const { return Encoding::LittleEndian::HostSwap16(mVersion); }
/**
* This method sets the Thread version.
*
* @param[in] aVersion The Thread version.
*
*/
void SetVersion(uint16_t aVersion) { mVersion = Encoding::LittleEndian::HostSwap16(aVersion); }
private:
Mac::ExtAddress mExtAddress; ///< Extended Address
uint16_t mVersion; ///< Version
} OT_TOOL_PACKED_END;
/**
* This structure represents the child information for settings storage.
*
*/
OT_TOOL_PACKED_BEGIN
class ChildInfo
{
public:
/**
* This method clears the struct object (setting all the fields to zero).
*
*/
void Init(void)
{
memset(this, 0, sizeof(*this));
SetVersion(OT_THREAD_VERSION_1_1);
}
/**
* This method returns the extended address.
*
* @returns The extended address.
*
*/
const Mac::ExtAddress &GetExtAddress(void) const { return mExtAddress; }
/**
* This method sets the extended address.
*
* @param[in] aExtAddress The extended address.
*
*/
void SetExtAddress(const Mac::ExtAddress &aExtAddress) { mExtAddress = aExtAddress; }
/**
* This method returns the child timeout.
*
* @returns The child timeout.
*
*/
uint32_t GetTimeout(void) const { return Encoding::LittleEndian::HostSwap32(mTimeout); }
/**
* This method sets the child timeout.
*
* @param[in] aTimeout The child timeout.
*
*/
void SetTimeout(uint32_t aTimeout) { mTimeout = Encoding::LittleEndian::HostSwap32(aTimeout); }
/**
* This method returns the RLOC16.
*
* @returns The RLOC16.
*
*/
uint16_t GetRloc16(void) const { return Encoding::LittleEndian::HostSwap16(mRloc16); }
/**
* This method sets the RLOC16.
*
* @param[in] aRloc16 The RLOC16.
*
*/
void SetRloc16(uint16_t aRloc16) { mRloc16 = Encoding::LittleEndian::HostSwap16(aRloc16); }
/**
* This method returns the Thread device mode.
*
* @returns The Thread device mode.
*
*/
uint8_t GetMode(void) const { return mMode; }
/**
* This method sets the Thread device mode.
*
* @param[in] aRloc16 The Thread device mode.
*
*/
void SetMode(uint8_t aMode) { mMode = aMode; }
/**
* This method returns the Thread version.
*
* @returns The Thread version.
*
*/
uint16_t GetVersion(void) const { return Encoding::LittleEndian::HostSwap16(mVersion); }
/**
* This method sets the Thread version.
*
* @param[in] aVersion The Thread version.
*
*/
void SetVersion(uint16_t aVersion) { mVersion = Encoding::LittleEndian::HostSwap16(aVersion); }
private:
Mac::ExtAddress mExtAddress; ///< Extended Address
uint32_t mTimeout; ///< Timeout
uint16_t mRloc16; ///< RLOC16
uint8_t mMode; ///< The MLE device mode
uint16_t mVersion; ///< Version
} OT_TOOL_PACKED_END;
/**
* This enumeration defines the keys of settings.
*
*/
enum Key
{
kKeyActiveDataset = 0x0001, ///< Active Operational Dataset
kKeyPendingDataset = 0x0002, ///< Pending Operational Dataset
kKeyNetworkInfo = 0x0003, ///< Thread network information
kKeyParentInfo = 0x0004, ///< Parent information
kKeyChildInfo = 0x0005, ///< Child information
kKeyReserved = 0x0006, ///< Reserved (previously auto-start)
kKeySlaacIidSecretKey = 0x0007, ///< Secret key used by SLAAC module for generating semantically opaque IID
};
protected:
explicit SettingsBase(Instance &aInstance)
: InstanceLocator(aInstance)
{
}
#if (OPENTHREAD_CONFIG_LOG_LEVEL >= OT_LOG_LEVEL_INFO) && (OPENTHREAD_CONFIG_LOG_UTIL != 0)
void LogNetworkInfo(const char *aAction, const NetworkInfo &aNetworkInfo) const;
void LogParentInfo(const char *aAction, const ParentInfo &aParentInfo) const;
void LogChildInfo(const char *aAction, const ChildInfo &aChildInfo) const;
#else
void LogNetworkInfo(const char *, const NetworkInfo &) const {}
void LogParentInfo(const char *, const ParentInfo &) const {}
void LogChildInfo(const char *, const ChildInfo &) const {}
#endif
#if (OPENTHREAD_CONFIG_LOG_LEVEL >= OT_LOG_LEVEL_WARN) && (OPENTHREAD_CONFIG_LOG_UTIL != 0)
void LogFailure(otError aError, const char *aAction, bool aIsDelete) const;
#else
void LogFailure(otError, const char *, bool) const {}
#endif
};
/**
* This class defines methods related to non-volatile storage of settings.
*
*/
class Settings : public SettingsBase
{
public:
/**
* This constructor initializes a `Settings` object.
*
* @param[in] aInstance A reference to the OpenThread instance.
*
*/
explicit Settings(Instance &aInstance)
: SettingsBase(aInstance)
{
}
/**
* This method initializes the platform settings (non-volatile) module.
*
* This should be called before any other method from this class.
*
*/
void Init(void);
/**
* This method de-initializes the platform settings (non-volatile) module.
*
* This method should be called when OpenThread instance is no longer in use.
*
*/
void Deinit(void);
/**
* This method removes all settings from the non-volatile store.
*
*/
void Wipe(void);
/**
* This method saves the Operational Dataset (active or pending).
*
* @param[in] aIsActive Indicates whether Dataset is active or pending.
* @param[in] aDataset A reference to a `Dataset` object to be saved.
*
* @retval OT_ERROR_NONE Successfully saved the Dataset.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError SaveOperationalDataset(bool aIsActive, const MeshCoP::Dataset &aDataset);
/**
* This method reads the Operational Dataset (active or pending).
*
* @param[in] aIsActive Indicates whether Dataset is active or pending.
* @param[out] aDataset A reference to a `Dataset` object to output the read content.
*
* @retval OT_ERROR_NONE Successfully read the Dataset.
* @retval OT_ERROR_NOT_FOUND No corresponding value in the setting store.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError ReadOperationalDataset(bool aIsActive, MeshCoP::Dataset &aDataset) const;
/**
* This method deletes the Operational Dataset (active/pending) from settings.
*
* @param[in] aIsActive Indicates whether Dataset is active or pending.
*
* @retval OT_ERROR_NONE Successfully deleted the Dataset.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError DeleteOperationalDataset(bool aIsActive);
/**
* This method saves Network Info.
*
* @param[in] aNetworkInfo A reference to a `NetworkInfo` structure to be saved.
*
* @retval OT_ERROR_NONE Successfully saved Network Info in settings.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError SaveNetworkInfo(const NetworkInfo &aNetworkInfo);
/**
* This method reads Network Info.
*
* @param[out] aNetworkInfo A reference to a `NetworkInfo` structure to output the read content.
*
* @retval OT_ERROR_NONE Successfully read the Network Info.
* @retval OT_ERROR_NOT_FOUND No corresponding value in the setting store.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError ReadNetworkInfo(NetworkInfo &aNetworkInfo) const;
/**
* This method deletes Network Info from settings.
*
* @retval OT_ERROR_NONE Successfully deleted the value.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError DeleteNetworkInfo(void);
/**
* This method saves Parent Info.
*
* @param[in] aParentInfo A reference to a `ParentInfo` structure to be saved.
*
* @retval OT_ERROR_NONE Successfully saved Parent Info in settings.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError SaveParentInfo(const ParentInfo &aParentInfo);
/**
* This method reads Parent Info.
*
* @param[out] aParentInfo A reference to a `ParentInfo` structure to output the read content.
*
* @retval OT_ERROR_NONE Successfully read the Parent Info.
* @retval OT_ERROR_NOT_FOUND No corresponding value in the setting store.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError ReadParentInfo(ParentInfo &aParentInfo) const;
/**
* This method deletes Parent Info from settings.
*
* @retval OT_ERROR_NONE Successfully deleted the value.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError DeleteParentInfo(void);
#if OPENTHREAD_CONFIG_IP6_SLAAC_ENABLE
/**
* This method saves the SLAAC IID secret key.
*
* @param[in] aKey The SLAAC IID secret key.
*
* @retval OT_ERROR_NONE Successfully saved the value.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError SaveSlaacIidSecretKey(const Utils::Slaac::IidSecretKey &aKey)
{
return Save(kKeySlaacIidSecretKey, &aKey, sizeof(Utils::Slaac::IidSecretKey));
}
/**
* This method reads the SLAAC IID secret key.
*
* @param[out] aKey A reference to a SLAAC IID secret key to output the read value.
*
* @retval OT_ERROR_NONE Successfully read the value.
* @retval OT_ERROR_NOT_FOUND No corresponding value in the setting store.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError ReadSlaacIidSecretKey(Utils::Slaac::IidSecretKey &aKey)
{
uint16_t length = sizeof(aKey);
return Read(kKeySlaacIidSecretKey, &aKey, length);
}
/**
* This method deletes the SLAAC IID secret key value from settings.
*
* @retval OT_ERROR_NONE Successfully deleted the value.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError DeleteSlaacIidSecretKey(void) { return Delete(kKeySlaacIidSecretKey); }
#endif // OPENTHREAD_CONFIG_IP6_SLAAC_ENABLE
/**
* This method adds a Child Info entry to settings.
*
* @note Child Info is a list-based settings property and can contain multiple entries.
*
* @param[in] aChildInfo A reference to a `ChildInfo` structure to be saved/added.
*
* @retval OT_ERROR_NONE Successfully saved the Child Info in settings.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError AddChildInfo(const ChildInfo &aChildInfo);
/**
* This method deletes all Child Info entries from the settings.
*
* @note Child Info is a list-based settings property and can contain multiple entries.
*
* @retval OT_ERROR_NONE Successfully deleted the value.
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError DeleteChildInfo(void);
/**
* This class defines an iterator to access all Child Info entries in the settings.
*
*/
class ChildInfoIterator : public SettingsBase
{
public:
/**
* This constructor initializes a `ChildInfoInterator` object.
*
* @param[in] aInstance A reference to the OpenThread instance.
*
*/
explicit ChildInfoIterator(Instance &aInstance);
/**
* This method resets the iterator to start from the first Child Info entry in the list.
*
*/
void Reset(void);
/**
* This method indicates whether there are no more Child Info entries in the list (iterator has reached end of
* the list), or the current entry is valid.
*
* @retval TRUE There are no more entries in the list (reached end of the list).
* @retval FALSE The current entry is valid.
*
*/
bool IsDone(void) const { return mIsDone; }
/**
* This method advances the iterator to move to the next Child Info entry in the list (if any).
*
*/
void Advance(void);
/**
* This method overloads operator `++` (pre-increment) to advance the iterator to move to the next Child Info
* entry in the list (if any).
*
*/
void operator++(void) { Advance(); }
/**
* This method overloads operator `++` (post-increment) to advance the iterator to move to the next Child Info
* entry in the list (if any).
*
*/
void operator++(int) { Advance(); }
/**
* This method gets the Child Info corresponding to the current iterator entry in the list.
*
* @note This method should be used only if `IsDone()` is returning FALSE indicating that the iterator is
* pointing to a valid entry.
*
* @returns A reference to `ChildInfo` structure corresponding to current iterator entry.
*
*/
const ChildInfo &GetChildInfo(void) const { return mChildInfo; }
/**
* This method deletes the current Child Info entry.
*
* @retval OT_ERROR_NONE The entry was deleted successfully.
* @retval OT_ERROR_INVALID_STATE The entry is not valid (iterator has reached end of list).
* @retval OT_ERROR_NOT_IMPLEMENTED The platform does not implement settings functionality.
*
*/
otError Delete(void);
private:
void Read(void);
ChildInfo mChildInfo;
uint16_t mIndex;
bool mIsDone;
};
private:
otError Read(Key aKey, void *aBuffer, uint16_t &aSize) const;
otError Save(Key aKey, const void *aValue, uint16_t aSize);
otError Add(Key aKey, const void *aValue, uint16_t aSize);
otError Delete(Key aKey);
};
} // namespace ot
#endif // SETTINGS_HPP_