Concrete implementation of a lease database backend using flat file. More...

#include <memfile_lease_mgr.h>

Inheritance diagram for isc::dhcp::Memfile_LeaseMgr:

Public Types
enum	Universe { V4 , V6 }
	Specifies universe (V4, V6) More...

Public Types inherited from isc::dhcp::TrackingLeaseMgr
typedef std::function< void(LeasePtr)>	CallbackFn
	Type of a callback function invoked upon a lease insertion, update or deletion.

enum	CallbackType { TRACK_ADD_LEASE , TRACK_UPDATE_LEASE , TRACK_DELETE_LEASE }
	An enumeration differentiating between lease write operations. More...

Public Member Functions
virtual void	commit () override
	Commit Transactions.

virtual std::string	getDescription () const override
	Returns description of the backend.

virtual std::string	getName () const override
	Returns backend name.

virtual std::string	getType () const override
	Return backend type.

virtual std::pair< uint32_t, uint32_t >	getVersion (const std::string &timer_name=std::string()) const override
	Returns backend version.

virtual void	rollback () override
	Rollback Transactions.

Public methods to retrieve information about the LFC process state.
These methods are meant to be used by unit tests to retrieve the state of the spawned LFC process before validating the result of the lease file cleanup.
bool	isLFCRunning () const
	Checks if the process performing lease file cleanup is running.

int	getLFCExitStatus () const
	Returns the status code returned by the last executed LFC process.

virtual LeaseStatsQueryPtr	startLeaseStatsQuery4 () override
	Creates and runs the IPv4 lease stats query.

virtual LeaseStatsQueryPtr	startPoolLeaseStatsQuery4 () override
	Creates and runs the IPv4 lease stats query for all subnets and pools.

virtual LeaseStatsQueryPtr	startSubnetLeaseStatsQuery4 (const SubnetID &subnet_id) override
	Creates and runs the IPv4 lease stats query for a single subnet.

virtual LeaseStatsQueryPtr	startSubnetRangeLeaseStatsQuery4 (const SubnetID &first_subnet_id, const SubnetID &last_subnet_id) override
	Creates and runs the IPv4 lease stats query for a single subnet.

virtual LeaseStatsQueryPtr	startLeaseStatsQuery6 () override
	Creates and runs the IPv6 lease stats query.

virtual LeaseStatsQueryPtr	startPoolLeaseStatsQuery6 () override
	Creates and runs the IPv6 lease stats query for all subnets and pools.

virtual LeaseStatsQueryPtr	startSubnetLeaseStatsQuery6 (const SubnetID &subnet_id) override
	Creates and runs the IPv6 lease stats query for a single subnet.

virtual LeaseStatsQueryPtr	startSubnetRangeLeaseStatsQuery6 (const SubnetID &first_subnet_id, const SubnetID &last_subnet_id) override
	Creates and runs the IPv6 lease stats query for a single subnet.

Public Member Functions inherited from isc::dhcp::TrackingLeaseMgr
bool	hasCallbacks () const
	Checks if any callbacks have been registered.

bool	isLocked (const LeasePtr &lease)
	Checks if the lease is locked.

void	registerCallback (CallbackType type, std::string owner, Lease::Type lease_type, CallbackFn callback_fn)
	Registers a callback function for all subnets.

void	registerCallback (CallbackType type, std::string owner, SubnetID subnet_id, Lease::Type lease_type, CallbackFn callback_fn)
	Registers a callback function for a subnet.

void	unregisterAllCallbacks ()
	Unregisters all callbacks.

void	unregisterCallbacks (SubnetID subnet_id, Lease::Type lease_type)
	Unregisters all callbacks for a given subnet identifier.

Public Member Functions inherited from isc::dhcp::LeaseMgr
	LeaseMgr ()
	Constructor.

virtual	~LeaseMgr ()
	Destructor.

bool	getExtendedInfoTablesEnabled () const
	Returns the setting indicating if lease6 extended info tables are enabled.

Lease6Ptr	getLease6 (Lease::Type type, const DUID &duid, uint32_t iaid, SubnetID subnet_id) const
	returns zero or one IPv6 lease for a given duid+iaid+subnet_id

void	recountLeaseStats4 ()
	Recalculates per-subnet and global stats for IPv4 leases.

void	recountLeaseStats6 ()
	Recalculates per-subnet and global stats for IPv6 leases.

void	setExtendedInfoTablesEnabled (const bool enabled)
	Modifies the setting whether the lease6 extended info tables are enabled.

Static Public Attributes
static const int	MAJOR_VERSION_V4 = 3

static const int	MAJOR_VERSION_V6 = 5

static const int	MINOR_VERSION_V4 = 0
	the minor version of the v4 memfile backend

static const int	MINOR_VERSION_V6 = 0
	the minor version of the v6 memfile backend

Protected Member Functions
Protected methods used for Lease File Cleanup.
The following methods are protected so as they can be accessed and tested by unit tests.
virtual void	lfcCallback ()
	A callback function triggering Lease File Cleanup (LFC).

Protected Member Functions inherited from isc::dhcp::TrackingLeaseMgr
	TrackingLeaseMgr ()
	Constructor.

void	runCallbacks (CallbackType type, const LeasePtr &lease)
	Runs registered callbacks of the particular type.

void	runCallbacksForSubnetID (CallbackType type, SubnetID subnet_id, const LeasePtr &lease)
	Runs registered callbacks of the particular type for a subnet id.

void	trackAddLease (const LeasePtr &lease)
	Invokes the callbacks when a new lease is added.

void	trackDeleteLease (const LeasePtr &lease)
	Invokes the callbacks when a lease is deleted.

void	trackUpdateLease (const LeasePtr &lease)
	Invokes the callbacks when a lease is updated.

bool	tryLock (const LeasePtr &lease)
	Attempts to lock a lease.

void	unlock (const LeasePtr &lease)
	Attempts to unlock a lease.

Protected Member Functions inherited from isc::dhcp::LeaseMgr
virtual bool	addExtendedInfo6 (const Lease6Ptr &lease)
	Extract extended info from a lease6 and add it into tables.

void	setExtendedInfoTablesEnabled (const db::DatabaseConnection::ParameterMap &parameters)
	Extended information / Bulk Lease Query shared interface.

Public type and method used to determine file names for LFC.
enum	LFCFileType { FILE_CURRENT , FILE_INPUT , FILE_PREVIOUS , FILE_OUTPUT , FILE_FINISH , FILE_PID }
	Types of the lease files used by the Lease File Cleanup. More...

static std::string	appendSuffix (const std::string &file_name, const LFCFileType &file_type)
	Appends appropriate suffix to the file name.

Miscellaneous public convenience methods.
The following methods allow for retrieving useful information about the state of the backend.
Lease6ExtendedInfoRelayIdTable	relay_id6_
	stores IPv6 by-relay-id cross-reference table

Lease6ExtendedInfoRemoteIdTable	remote_id6_
	stores IPv6 by-remote-id cross-reference table

boost::shared_ptr< CSVLeaseFile4 >	lease_file4_
	Holds the pointer to the DHCPv4 lease file IO.

boost::shared_ptr< CSVLeaseFile6 >	lease_file6_
	Holds the pointer to the DHCPv6 lease file IO.

std::string	getDefaultLeaseFilePath (Universe u) const
	Returns default path to the lease file.

std::string	getLeaseFilePath (Universe u) const
	Returns an absolute path to the lease file.

bool	persistLeases (Universe u) const
	Specifies whether or not leases are written to disk.

Private methods and members used for Lease File Cleanup.
virtual size_t	getClassLeaseCount (const ClientClass &client_class, const Lease::Type &ltype=Lease::TYPE_V4) const override
	Returns the class lease count for a given class and lease type.

virtual void	recountClassLeases4 () override
	Recount the leases per class for V4 leases.

virtual void	recountClassLeases6 () override
	Recount the leases per class for V6 leases.

virtual void	clearClassLeaseCounts () override
	Clears the class-lease count map.

virtual Lease4Collection	getLeases4ByRelayId (const OptionBuffer &relay_id, const asiolink::IOAddress &lower_bound_address, const LeasePageSize &page_size, const time_t &qry_start_time=0, const time_t &qry_end_time=0) override
	The following queries are used to fulfill Bulk Lease Query queries.

virtual Lease4Collection	getLeases4ByRemoteId (const OptionBuffer &remote_id, const asiolink::IOAddress &lower_bound_address, const LeasePageSize &page_size, const time_t &qry_start_time=0, const time_t &qry_end_time=0) override
	Returns existing IPv4 leases with a given remote-id.

virtual Lease6Collection	getLeases6ByRelayId (const DUID &relay_id, const asiolink::IOAddress &lower_bound_address, const LeasePageSize &page_size) override
	Returns existing IPv6 leases with a given relay-id.

virtual Lease6Collection	getLeases6ByRemoteId (const OptionBuffer &remote_id, const asiolink::IOAddress &lower_bound_address, const LeasePageSize &page_size) override
	Returns existing IPv6 leases with a given remote-id.

size_t	extractExtendedInfo4 (bool update, bool current)
	Extract extended info for v4 leases.

virtual size_t	upgradeExtendedInfo6 (const LeasePageSize &page_size) override
	Upgrade extended info (v6).

virtual void	wipeExtendedInfoTables6 () override
	Wipe extended info table (v6).

virtual size_t	byRelayId6size () const override
	Return the by-relay-id table size.

virtual size_t	byRemoteId6size () const override
	Return the by-remote-id table size.

virtual void	writeLeases4 (const std::string &filename) override
	Write V4 leases to a file.

virtual void	writeLeases6 (const std::string &filename) override
	Write V6 leases to a file.

virtual size_t	upgradeExtendedInfo4 (const LeasePageSize &page_size) override
	Upgrade extended info (v4).

static TrackingLeaseMgrPtr	factory (const isc::db::DatabaseConnection::ParameterMap &parameters)
	Factory class method.

void	buildExtendedInfoTables6 ()
	Extended information / Bulk Lease Query shared interface.

virtual void	deleteExtendedInfo6 (const isc::asiolink::IOAddress &addr) override
	Delete lease6 extended info from tables.

virtual void	addRelayId6 (const isc::asiolink::IOAddress &lease_addr, const std::vector< uint8_t > &relay_id) override
	Add lease6 extended info into by-relay-id table.

virtual void	addRemoteId6 (const isc::asiolink::IOAddress &lease_addr, const std::vector< uint8_t > &remote_id) override
	Add lease6 extended info into by-remote-id table.

Methods implementing the API of the lease database backend.
The following methods are implementing the API of the `LeaseMgr` to manage leases.
	Memfile_LeaseMgr (const db::DatabaseConnection::ParameterMap &parameters)
	The sole lease manager constructor.

virtual	~Memfile_LeaseMgr ()
	Destructor (closes file)

virtual bool	addLease (const Lease4Ptr &lease) override
	Adds an IPv4 lease.

virtual bool	addLease (const Lease6Ptr &lease) override
	Adds an IPv6 lease.

virtual Lease4Ptr	getLease4 (const isc::asiolink::IOAddress &addr) const override
	Returns existing IPv4 lease for specified IPv4 address.

virtual Lease4Collection	getLease4 (const isc::dhcp::HWAddr &hwaddr) const override
	Returns existing IPv4 leases for specified hardware address.

virtual Lease4Ptr	getLease4 (const HWAddr &hwaddr, SubnetID subnet_id) const override
	Returns existing IPv4 lease for specified hardware address and a subnet.

virtual Lease4Collection	getLease4 (const ClientId &client_id) const override
	Returns existing IPv4 lease for specified client-id.

virtual Lease4Ptr	getLease4 (const ClientId &clientid, SubnetID subnet_id) const override
	Returns existing IPv4 lease for specified client-id.

virtual Lease4Collection	getLeases4 (SubnetID subnet_id) const override
	Returns all IPv4 leases for the particular subnet identifier.

virtual Lease4Collection	getLeases4 (const std::string &hostname) const override
	Returns all IPv4 leases for the particular hostname.

virtual Lease4Collection	getLeases4 () const override
	Returns all IPv4 leases.

virtual Lease4Collection	getLeases4 (const asiolink::IOAddress &lower_bound_address, const LeasePageSize &page_size) const override
	Returns range of IPv4 leases using paging.

virtual Lease6Ptr	getLease6 (Lease::Type type, const isc::asiolink::IOAddress &addr) const override
	Returns existing IPv6 lease for a given IPv6 address.

virtual Lease6Collection	getLeases6 (Lease::Type type, const DUID &duid, uint32_t iaid) const override
	Returns existing IPv6 lease for a given DUID + IA + lease type combination.

virtual Lease6Collection	getLeases6 (Lease::Type type, const DUID &duid, uint32_t iaid, SubnetID subnet_id) const override
	Returns existing IPv6 lease for a given DUID + IA + subnet-id + lease type combination.

virtual Lease6Collection	getLeases6 (SubnetID subnet_id) const override
	Returns all IPv6 leases for the particular subnet identifier.

virtual Lease6Collection	getLeases6 (const std::string &hostname) const override
	Returns all IPv6 leases for the particular hostname.

virtual Lease6Collection	getLeases6 () const override
	Returns all IPv6 leases.

virtual Lease6Collection	getLeases6 (const DUID &duid) const override
	Returns IPv6 leases for the DUID.

virtual Lease6Collection	getLeases6 (const asiolink::IOAddress &lower_bound_address, const LeasePageSize &page_size) const override
	Returns range of IPv6 leases using paging.

virtual Lease6Collection	getLeases6 (SubnetID subnet_id, const asiolink::IOAddress &lower_bound_address, const LeasePageSize &page_size) const override
	Returns a page of IPv6 leases for a subnet identifier.

virtual void	getExpiredLeases4 (Lease4Collection &expired_leases, const size_t max_leases) const override
	Returns a collection of expired DHCPv4 leases.

virtual void	getExpiredLeases6 (Lease6Collection &expired_leases, const size_t max_leases) const override
	Returns a collection of expired DHCPv6 leases.

virtual void	updateLease4 (const Lease4Ptr &lease4) override
	Updates IPv4 lease.

virtual void	updateLease6 (const Lease6Ptr &lease6) override
	Updates IPv6 lease.

virtual bool	deleteLease (const Lease4Ptr &lease) override
	Deletes an IPv4 lease.

virtual bool	deleteLease (const Lease6Ptr &lease) override
	Deletes an IPv6 lease.

virtual uint64_t	deleteExpiredReclaimedLeases4 (const uint32_t secs) override
	Deletes all expired-reclaimed DHCPv4 leases.

virtual uint64_t	deleteExpiredReclaimedLeases6 (const uint32_t secs) override
	Deletes all expired-reclaimed DHCPv6 leases.

virtual size_t	wipeLeases4 (const SubnetID &subnet_id) override
	Removes specified IPv4 leases.

virtual size_t	wipeLeases6 (const SubnetID &subnet_id) override
	Removed specified IPv6 leases.

virtual std::string	checkLimits4 (isc::data::ConstElementPtr const &user_context) const override
	Checks if the IPv4 lease limits set in the given user context are exceeded.

virtual std::string	checkLimits6 (isc::data::ConstElementPtr const &user_context) const override
	Checks if the IPv6 lease limits set in the given user context are exceeded.

virtual bool	isJsonSupported () const override
	Checks if JSON support is enabled in the database.

static std::string	getDBVersion ()
	Return extended version info.

static std::string	getDBVersionInternal (Universe const &u)
	Local version of getDBVersion() class method.

Additional Inherited Members
Static Public Member Functions inherited from isc::dhcp::LeaseMgr
static void	extractLease4ExtendedInfo (const Lease4Ptr &lease, bool ignore_errors=true)
	Extract relay and remote identifiers from the extended info.

static std::string	getDBVersion ()
	Class method to return extended version info This class method must be redeclared and redefined in derived classes.

static bool	upgradeLease4ExtendedInfo (const Lease4Ptr &lease, CfgConsistency::ExtendedInfoSanity check=CfgConsistency::EXTENDED_INFO_CHECK_FIX)
	The following queries are used to fulfill Bulk Lease Query queries.

static bool	upgradeLease6ExtendedInfo (const Lease6Ptr &lease, CfgConsistency::ExtendedInfoSanity check=CfgConsistency::EXTENDED_INFO_CHECK_FIX)
	Upgrade a V6 lease user context to the new extended info entry.

Protected Types inherited from isc::dhcp::TrackingLeaseMgr
typedef boost::multi_index_container< Callback, boost::multi_index::indexed_by< boost::multi_index::ordered_non_unique< boost::multi_index::composite_key< Callback, boost::multi_index::member< Callback, CallbackType, &Callback::type >, boost::multi_index::member< Callback, SubnetID, &Callback::subnet_id >, boost::multi_index::member< Callback, Lease::Type, &Callback::lease_type > > >, boost::multi_index::ordered_non_unique< boost::multi_index::composite_key< Callback, boost::multi_index::member< Callback, SubnetID, &Callback::subnet_id >, boost::multi_index::member< Callback, Lease::Type, &Callback::lease_type > > > > >	CallbackContainer
	A multi-index container holding registered callbacks.

typedef boost::shared_ptr< CallbackContainer >	CallbackContainerPtr
	Pointer to the callback container.

Static Protected Member Functions inherited from isc::dhcp::TrackingLeaseMgr
static std::string	callbackTypeToString (CallbackType type)
	Converts callback type to string for logging purposes.

Protected Attributes inherited from isc::dhcp::TrackingLeaseMgr
CallbackContainerPtr	callbacks_
	The multi-index container holding registered callbacks.

std::unordered_set< asiolink::IOAddress, asiolink::IOAddress::Hash >	locked_leases_
	A set of locked leases.

Detailed Description

Concrete implementation of a lease database backend using flat file.

This class implements a lease database backend using CSV files to store DHCPv4 and DHCPv6 leases on disk. The format of the files is determined by the CSVLeaseFile4 and CSVLeaseFile6 classes.

In order to obtain good performance, the backend stores leases incrementally, i.e. updates to leases are appended at the end of the lease file. To record the deletion of a lease, the lease record is appended to the lease file with the valid lifetime set to 0. However, this may result in a significant growth of the lease file size over time, because the lease file will contain many entries for each lease. In order to mitigate this problem, the backend implements the Lease File Cleanup mechanism which is described on the Kea wiki: https://gitlab.isc.org/isc-projects/kea/wikis/designs/Lease-File-Cleanup-design.

The backend installs an asiolink::IntervalTimer to periodically execute the Memfile_LeaseMgr::lfcCallback. This callback function controls the startup of the background process which removes redundant information from the lease file(s).

When the backend is starting up, it reads leases from the lease file (one by one) and adds them to the in-memory container as follows:

if the lease record being parsed identifies a lease which is not present in the container, and the lease has valid lifetime greater than 0, the lease is added to the container,
if the lease record being parsed identifies a lease which is present in the container, and the valid lifetime of the lease record being parsed is greater than 0, the lease in the container is updated
if the lease record being parsed has valid lifetime equal to 0, and the corresponding lease exists in the container, the lease is removed from the container.

After the container holding leases is initialized, each subsequent update, removal or addition of the lease is appended to the lease file synchronously.

Originally, the Memfile backend didn't write leases to disk. This was particularly useful for testing server performance in non-disk bound conditions. In order to preserve this capability, the new parameter "persist=true|false" has been introduced in the database access string. For example, database access string: "type=memfile persist=true" enables writes of leases to a disk.

The lease file locations can be specified with the "name=[path]" parameter in the database access string. The [path] is the absolute path to the file (including file name). If this parameter is not specified, the default location in the installation directory is used: <install-dir>/var/lib/kea/kea-leases4.csv and <install-dir>/var/lib/kea/kea-leases6.csv.

Definition at line 81 of file memfile_lease_mgr.h.

Member Enumeration Documentation

◆ LFCFileType

enum isc::dhcp::Memfile_LeaseMgr::LFCFileType

Types of the lease files used by the Lease File Cleanup.

This enumeration is used by a method which appends the appropriate suffix to the lease file name.

Enumerator
FILE_CURRENT	Lease File
FILE_INPUT	Lease File Copy
FILE_PREVIOUS	Previous Lease File.
FILE_OUTPUT	LFC Output File.
FILE_FINISH	LFC Finish File.
FILE_PID	PID File.

Definition at line 956 of file memfile_lease_mgr.h.

◆ Universe

enum isc::dhcp::Memfile_LeaseMgr::Universe

Specifies universe (V4, V6)

This enumeration is used by various functions in Memfile Lease Manager, to identify the lease type referred to. In particular, it is used by functions operating on the lease files to distinguish between lease files for DHCPv4 and DHCPv6.

Enumerator
V4
V6

Definition at line 124 of file memfile_lease_mgr.h.

Constructor & Destructor Documentation

◆ Memfile_LeaseMgr()

isc::dhcp::Memfile_LeaseMgr::Memfile_LeaseMgr ( const db::DatabaseConnection::ParameterMap & parameters )

The sole lease manager constructor.

This method:

Initializes the new instance based on the parameters given
Loads (or creates) the appropriate lease file(s)
Initiates the periodic scheduling of the LFC (if enabled)

If any of the files loaded require conversion to the current schema (upgrade or downgrade), lfcSetup() will be invoked with its run_once_now parameter set to true. This causes lfcSetup() to invoke the LFC process immediately regardless of whether LFC is enabled. This ensures that any files which need conversion are converted automatically.

dbconfig is a generic way of passing parameters. Parameters are passed in the "name=value" format, separated by spaces. Values may be enclosed in double quotes, if needed.

Parameters

parameters A data structure relating keywords and values concerned with the database.

Definition at line 976 of file memfile_lease_mgr.cc.

References buildExtendedInfoTables6(), isc::dhcp::dhcpsrv_logger, isc::dhcp::DHCPSRV_MEMFILE_CONVERTING_LEASE_FILES, isc::dhcp::DHCPSRV_MEMFILE_NO_STORAGE, extractExtendedInfo4(), isc::db::DatabaseConnection::getParameter(), getVersion(), lease_file4_, lease_file6_, LOG_WARN, persistLeases(), isc::dhcp::LeaseMgr::setExtendedInfoTablesEnabled(), V4, V6, and version().

Referenced by factory().

Here is the call graph for this function:

◆ ~Memfile_LeaseMgr()

isc::dhcp::Memfile_LeaseMgr::~Memfile_LeaseMgr ( )

virtual

Destructor (closes file)

Definition at line 1021 of file memfile_lease_mgr.cc.

References lease_file4_, and lease_file6_.

Member Function Documentation

◆ addLease() [1/2]

bool isc::dhcp::Memfile_LeaseMgr::addLease ( const Lease4Ptr & lease )

overridevirtual

Adds an IPv4 lease.

Parameters

lease lease to be added

Returns: true if the lease was added, false if not

lease_addr	The address of the lease.
relay_id	The relay id from the relay header options.

lease_addr	The address of the lease.
remote_id	The remote id from the relay header options.

file_name	A base file name to which suffix is appended.
file_type	An LFC file type.

size_t isc::dhcp::Memfile_LeaseMgr::extractExtendedInfo4	(	bool	update,
		bool	current )

update	Update extended info in database.
current	specify whether to use current (true) or staging (false) config.

client_class	client class for which the count is desired
ltype	type of lease for which the count is desired. Defaults to Lease::TYPE_V4.

[out]	expired_leases	A container to which expired leases returned by the database backend are added.
	max_leases	A maximum number of leases to be returned. If this value is set to 0, all expired (but not reclaimed) leases are returned.

clientid	client identifier
subnet_id	identifier of the subnet that lease must belong to

hwaddr	hardware address of the client
subnet_id	identifier of the subnet that lease must belong to

type	specifies lease type: (NA, TA or PD)
addr	An address of the searched lease.

lower_bound_address	IPv4 address used as lower bound for the returned range.
page_size	maximum size of the page returned.

relay_id	RAI Relay-ID sub-option value for relay_id of interest
lower_bound_address	IPv4 address used as lower bound for the returned range.
page_size	maximum size of the page returned.
qry_start_time	when not zero, only leases whose CLTT is greater than or equal to this value will be included
qry_end_time	when not zero, only leases whose CLTT is less than or equal to this value will be included

remote_id	RAI Remote-ID sub-option value for remote-id of interest
lower_bound_address	IPv4 address used as lower bound for the returned range.
page_size	maximum size of the page returned.
qry_start_time	when not zero, only leases whose CLTT is greater than or equal to this value will be included. Defaults to zero.
qry_end_time	when not zero, only leases whose CLTT is less than or equal to this value will be included. Defaults to zero.

lower_bound_address	IPv6 address used as lower bound for the returned range.
page_size	maximum size of the page returned.

type	specifies lease type: (NA, TA or PD)
duid	client DUID
iaid	IA identifier

subnet_id	subnet identifier.
lower_bound_address	IPv6 address used as lower bound for the returned range.
page_size	maximum size of the page returned.

relay_id	DUID for relay_id of interest.
lower_bound_address	IPv4 address used as lower bound for the returned range.
page_size	maximum size of the page returned.

remote_id	remote-id option data of interest
lower_bound_address	IPv4 address used as lower bound for the returned range.
page_size	maximum size of the page returned.

first_subnet_id	first subnet in the range of subnets
last_subnet_id	last subnet in the range of subnets

Public Types

Public Member Functions

Static Public Attributes

Protected Member Functions

Public type and method used to determine file names for LFC.

Miscellaneous public convenience methods.

Private methods and members used for Lease File Cleanup.

Methods implementing the API of the lease database backend.

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ LFCFileType

◆ Universe

Constructor & Destructor Documentation

◆ Memfile_LeaseMgr()

◆ ~Memfile_LeaseMgr()

Member Function Documentation

◆ addLease() [1/2]

◆ addLease() [2/2]

◆ addRelayId6()

◆ addRemoteId6()

◆ appendSuffix()

◆ buildExtendedInfoTables6()

◆ byRelayId6size()

◆ byRemoteId6size()

◆ checkLimits4()

◆ checkLimits6()

◆ clearClassLeaseCounts()

◆ commit()

◆ deleteExpiredReclaimedLeases4()

◆ deleteExpiredReclaimedLeases6()

◆ deleteExtendedInfo6()

◆ deleteLease() [1/2]

◆ deleteLease() [2/2]

◆ extractExtendedInfo4()

◆ factory()

◆ getClassLeaseCount()

◆ getDBVersion()

◆ getDBVersionInternal()

◆ getDefaultLeaseFilePath()

◆ getDescription()

◆ getExpiredLeases4()

◆ getExpiredLeases6()

◆ getLease4() [1/5]

◆ getLease4() [2/5]

◆ getLease4() [3/5]

◆ getLease4() [4/5]

◆ getLease4() [5/5]

◆ getLease6()

◆ getLeaseFilePath()

◆ getLeases4() [1/4]

◆ getLeases4() [2/4]

◆ getLeases4() [3/4]

◆ getLeases4() [4/4]

◆ getLeases4ByRelayId()

◆ getLeases4ByRemoteId()

◆ getLeases6() [1/8]

◆ getLeases6() [2/8]

◆ getLeases6() [3/8]

◆ getLeases6() [4/8]

◆ getLeases6() [5/8]

◆ getLeases6() [6/8]

◆ getLeases6() [7/8]

◆ getLeases6() [8/8]

◆ getLeases6ByRelayId()

◆ getLeases6ByRemoteId()

◆ getLFCExitStatus()

◆ getName()

◆ getType()

◆ getVersion()

◆ isJsonSupported()

◆ isLFCRunning()

◆ lfcCallback()

◆ persistLeases()

◆ recountClassLeases4()

◆ recountClassLeases6()

◆ rollback()

◆ startLeaseStatsQuery4()

◆ startLeaseStatsQuery6()

◆ startPoolLeaseStatsQuery4()