iterative_allocator.h

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// Copyright (C) 2022-2023 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef ITERATIVE_ALLOCATOR_H
#define ITERATIVE_ALLOCATOR_H

#include <dhcpsrv/allocator.h>
#include <dhcpsrv/iterative_allocation_state.h>
#include <dhcpsrv/lease.h>

#include <cstdint>

namespace isc {
namespace dhcp {

class IterativeAllocator : public Allocator {
public:

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

private:

    virtual asiolink::IOAddress pickAddressInternal(const ClientClasses& client_classes,
                                                    const DuidPtr& duid,
                                                    const asiolink::IOAddress& hint);

    virtual isc::asiolink::IOAddress
    pickPrefixInternal(const ClientClasses& client_classes,
                       Pool6Ptr& pool,
                       const DuidPtr& duid,
                       PrefixLenMatchType prefix_length_match,
                       const isc::asiolink::IOAddress& hint,
                       uint8_t hint_prefix_length);

    SubnetIterativeAllocationStatePtr getSubnetState() const;

    PoolIterativeAllocationStatePtr getPoolState(const PoolPtr& pool) const;

protected:

    static asiolink::IOAddress increasePrefix(const asiolink::IOAddress& prefix,
                                              const uint8_t prefix_len);

    static asiolink::IOAddress increaseAddress(const asiolink::IOAddress& address,
                                               bool prefix,
                                               const uint8_t prefix_len);
};

}  // namespace dhcp
}  // end of namespace isc

#endif  // ITERATIVE_ALLOCATOR_H