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// Copyright (C) 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/.
#include <config.h>
#include <dhcpsrv/flq_allocation_state.h>
#include <boost/make_shared.hpp>
using namespace isc::asiolink;
namespace isc {
namespace dhcp {
PoolFreeLeaseQueueAllocationStatePtr
PoolFreeLeaseQueueAllocationState::create(const PoolPtr& pool) {
return (boost::make_shared<PoolFreeLeaseQueueAllocationState>(pool->getType()));
}
PoolFreeLeaseQueueAllocationState::PoolFreeLeaseQueueAllocationState(Lease::Type type)
: AllocationState(), free_lease4_queue_(), free_lease6_queue_() {
if (type == Lease::TYPE_V4) {
free_lease4_queue_ = boost::make_shared<FreeLeaseQueue<uint32_t>>();
} else {
free_lease6_queue_ = boost::make_shared<FreeLeaseQueue<IOAddress>>();
}
}
bool
PoolFreeLeaseQueueAllocationState::exhausted() const {
return ((free_lease4_queue_ && free_lease4_queue_->empty()) ||
(free_lease6_queue_ && free_lease6_queue_->empty()));
}
void
PoolFreeLeaseQueueAllocationState::addFreeLease(const asiolink::IOAddress& address) {
if (free_lease4_queue_) {
free_lease4_queue_->push_back(address.toUint32());
} else {
free_lease6_queue_->push_back(address);
}
}
void
PoolFreeLeaseQueueAllocationState::deleteFreeLease(const asiolink::IOAddress& address) {
if (free_lease4_queue_) {
auto& idx = free_lease4_queue_->get<1>();
idx.erase(address.toUint32());
} else {
auto& idx = free_lease6_queue_->get<1>();
idx.erase(address);
}
}
IOAddress
PoolFreeLeaseQueueAllocationState::offerFreeLease() {
if (free_lease4_queue_) {
if (free_lease4_queue_->empty()) {
return (IOAddress::IPV4_ZERO_ADDRESS());
}
uint32_t lease = free_lease4_queue_->front();
free_lease4_queue_->pop_front();
free_lease4_queue_->push_back(lease);
return (IOAddress(lease));
}
if (free_lease6_queue_->empty()) {
return (IOAddress::IPV6_ZERO_ADDRESS());
}
IOAddress lease = free_lease6_queue_->front();
free_lease6_queue_->pop_front();
free_lease6_queue_->push_back(lease);
return (lease);
}
size_t
PoolFreeLeaseQueueAllocationState::getFreeLeaseCount() const {
if (free_lease4_queue_) {
return (free_lease4_queue_->size());
}
return (free_lease6_queue_->size());
}
} // end of namespace isc::dhcp
} // end of namespace isc
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