isc::dhcp::IterativeAllocator Class Reference

Address/prefix allocator that iterates over all addresses. More...

#include <iterative_allocator.h>

Inheritance diagram for isc::dhcp::IterativeAllocator:

Public Member Functions
	IterativeAllocator (Lease::Type type, const WeakSubnetPtr &subnet)
	Constructor.
virtual std::string	getType () const
	Returns the allocator type string.
Public Member Functions inherited from isc::dhcp::Allocator
	Allocator (Lease::Type type, const WeakSubnetPtr &subnet)
	Constructor.
virtual	~Allocator ()
	Virtual destructor.
void	initAfterConfigure ()
	Performs allocator initialization after server's reconfiguration.
virtual isc::asiolink::IOAddress	pickAddress (const ClientClasses &client_classes, const IdentifierBaseTypePtr &duid, const asiolink::IOAddress &hint)
	Picks an address.
virtual isc::asiolink::IOAddress	pickPrefix (const ClientClasses &client_classes, Pool6Ptr &pool, const IdentifierBaseTypePtr &duid, PrefixLenMatchType prefix_length_match, const asiolink::IOAddress &hint, uint8_t hint_prefix_length)
	Picks a delegated prefix.

Static Protected Member Functions
static asiolink::IOAddress	increaseAddress (const asiolink::IOAddress &address, bool prefix, const uint8_t prefix_len)
	Returns the next address or prefix.
static asiolink::IOAddress	increasePrefix (const asiolink::IOAddress &prefix, const uint8_t prefix_len)
	Returns the next prefix.

Additional Inherited Members
Public Types inherited from isc::dhcp::Allocator
enum	PrefixLenMatchType { PREFIX_LEN_EQUAL , PREFIX_LEN_LOWER , PREFIX_LEN_HIGHER }
	Type of preferred PD-pool prefix length selection criteria. More...
Static Public Member Functions inherited from isc::dhcp::Allocator
static bool	isValidPrefixPool (Allocator::PrefixLenMatchType prefix_length_match, PoolPtr pool, uint8_t hint_prefix_length)
	Check if the pool matches the selection criteria relative to the provided hint prefix length.
Protected Member Functions inherited from isc::dhcp::Allocator
virtual void	initAfterConfigureInternal ()
	Allocator-specific initialization function.
Protected Attributes inherited from isc::dhcp::Allocator
bool	inited_
	Indicates if the allocator has been initialized.
std::mutex	mutex_
	The mutex to protect the allocated lease.
Lease::Type	pool_type_
	Defines pool type allocation.
WeakSubnetPtr	subnet_
	Weak pointer to the subnet owning the allocator.
SubnetID	subnet_id_
	ID of a subnet to which the allocator belongs.

Detailed Description

Address/prefix allocator that iterates over all addresses.

This class implements an iterative algorithm that returns all addresses in a pool iteratively, one after another. Once the last address is reached, it starts allocating from the beginning of the first pool (i.e. it loops over).

Definition at line 25 of file iterative_allocator.h.

Constructor & Destructor Documentation

IterativeAllocator()

isc::dhcp::IterativeAllocator::IterativeAllocator	(	Lease::Type	type,
		const WeakSubnetPtr &	subnet )

Constructor.

Parameters

type	specifies the type of allocated leases.
subnet	weak pointer to the subnet owning the allocator.

Definition at line 20 of file iterative_allocator.cc.

Member Function Documentation

getType()

virtual std::string isc::dhcp::IterativeAllocator::getType ( ) const

inlinevirtual

Returns the allocator type string.

Returns

iterative string.

Implements isc::dhcp::Allocator.

Definition at line 37 of file iterative_allocator.h.

increaseAddress()

IOAddress isc::dhcp::IterativeAllocator::increaseAddress ( const asiolink::IOAddress & address, bool prefix, const uint8_t prefix_len )

staticprotected

Returns the next address or prefix.

This method works for IPv4 addresses, IPv6 addresses and IPv6 prefixes.

Parameters

address	address or prefix to be increased
prefix	true when the previous argument is a prefix.
prefix_len	length of the prefix.

Returns

result address or prefix

Definition at line 79 of file iterative_allocator.cc.

References isc::asiolink::IOAddress::increase(), and increasePrefix().

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increasePrefix()

isc::asiolink::IOAddress isc::dhcp::IterativeAllocator::increasePrefix ( const asiolink::IOAddress & prefix, const uint8_t prefix_len )

staticprotected

Returns the next prefix.

This method works for IPv6 addresses only. It increases the specified prefix by a given prefix_len. For example, 2001:db8:: increased by prefix length /32 will become 2001:db9::. This method is used to iterate over IPv6 prefix pools

Parameters

prefix	prefix to be increased.
prefix_len	length of the prefix to be increased.

Returns

next prefix.

Definition at line 26 of file iterative_allocator.cc.

References isc::asiolink::IOAddress::fromBytes(), isc_throw, isc::asiolink::IOAddress::isV6(), and isc::asiolink::IOAddress::toBytes().

Referenced by increaseAddress().

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The documentation for this class was generated from the following files:

• iterative_allocator.h
• iterative_allocator.cc