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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/.
#include <config.h>
#include <dhcpsrv/allocator.h>
#include <dhcpsrv/lease_mgr_factory.h>
#include <dhcpsrv/dhcpsrv_log.h>
using namespace isc::util;
namespace isc {
namespace dhcp {
Allocator::Allocator(Lease::Type type, const WeakSubnetPtr& subnet)
: inited_(false),
pool_type_(type),
subnet_id_(0),
subnet_(subnet) {
// Remember subnet ID in a separate variable. It may be needed in
// the destructor where the subnet weak pointer is unavailable.
subnet_id_ = subnet_.lock()->getID();
}
Allocator::~Allocator() {
if (!LeaseMgrFactory::haveInstance()) {
// If there is no lease manager instance, the callbacks are
// gone already anyway.
return;
}
// Remove the callbacks.
auto& lease_mgr = LeaseMgrFactory::instance();
lease_mgr.unregisterCallbacks(subnet_id_, pool_type_);
}
bool
Allocator::isValidPrefixPool(Allocator::PrefixLenMatchType prefix_length_match,
PoolPtr pool, uint8_t hint_prefix_length) {
auto pool6 = boost::dynamic_pointer_cast<Pool6>(pool);
if (!pool6) {
return (false);
}
if (!hint_prefix_length) {
return (true);
}
if (prefix_length_match == Allocator::PREFIX_LEN_EQUAL &&
pool6->getLength() != hint_prefix_length) {
return (false);
}
if (prefix_length_match == Allocator::PREFIX_LEN_LOWER &&
pool6->getLength() >= hint_prefix_length) {
return (false);
}
if (prefix_length_match == Allocator::PREFIX_LEN_HIGHER &&
pool6->getLength() <= hint_prefix_length) {
return (false);
}
return (true);
}
void
Allocator::initAfterConfigure() {
if (inited_) {
return;
}
auto subnet = subnet_.lock();
LOG_INFO(dhcpsrv_logger, DHCPSRV_CFGMGR_USE_ALLOCATOR)
.arg(getType())
.arg(Lease::typeToText(pool_type_))
.arg(subnet->toText());
initAfterConfigureInternal();
inited_ = true;
}
}
}
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