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// Copyright (C) 2014-2016 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/cfg_hosts.h>
#include <dhcpsrv/cfgmgr.h>
#include <dhcpsrv/host_mgr.h>
#include <dhcpsrv/hosts_log.h>
#include <dhcpsrv/host_data_source_factory.h>
namespace {
/// @brief Convenience function returning a pointer to the hosts configuration.
///
/// This function is called by the @c HostMgr methods requiring access to the
/// host reservations specified in the DHCP server configuration.
///
/// @return A pointer to the const hosts reservation configuration.
isc::dhcp::ConstCfgHostsPtr getCfgHosts() {
return (isc::dhcp::CfgMgr::instance().getCurrentCfg()->getCfgHosts());
}
} // end of anonymous namespace
namespace isc {
namespace dhcp {
using namespace isc::asiolink;
boost::scoped_ptr<HostMgr>&
HostMgr::getHostMgrPtr() {
static boost::scoped_ptr<HostMgr> host_mgr_ptr;
return (host_mgr_ptr);
}
void
HostMgr::create(const std::string& access) {
getHostMgrPtr().reset(new HostMgr());
if (!access.empty()) {
// If the user specified parameters, let's pass them to the create
// method. It will destroy any prior instances and will create
// the new one.
HostDataSourceFactory::create(access);
} else {
// Ok, no parameters were specified. We should destroy the existing
// instance.
HostDataSourceFactory::destroy();
}
// Now store the host data source pointer. It may be NULL. That's ok as
// NULL value indicates that there's no host data source configured.
getHostMgrPtr()->alternate_source_ =
HostDataSourceFactory::getHostDataSourcePtr();
}
HostMgr&
HostMgr::instance() {
boost::scoped_ptr<HostMgr>& host_mgr_ptr = getHostMgrPtr();
if (!host_mgr_ptr) {
create();
}
return (*host_mgr_ptr);
}
ConstHostCollection
HostMgr::getAll(const HWAddrPtr& hwaddr, const DuidPtr& duid) const {
ConstHostCollection hosts = getCfgHosts()->getAll(hwaddr, duid);
if (alternate_source_) {
ConstHostCollection hosts_plus = alternate_source_->getAll(hwaddr, duid);
hosts.insert(hosts.end(), hosts_plus.begin(), hosts_plus.end());
}
return (hosts);
}
ConstHostCollection
HostMgr::getAll(const Host::IdentifierType& identifier_type,
const uint8_t* identifier_begin,
const size_t identifier_len) const {
ConstHostCollection hosts = getCfgHosts()->getAll(identifier_type,
identifier_begin,
identifier_len);
if (alternate_source_) {
ConstHostCollection hosts_plus =
alternate_source_->getAll(identifier_type, identifier_begin,
identifier_len);
hosts.insert(hosts.end(), hosts_plus.begin(), hosts_plus.end());
}
return (hosts);
}
ConstHostCollection
HostMgr::getAll4(const IOAddress& address) const {
ConstHostCollection hosts = getCfgHosts()->getAll4(address);
if (alternate_source_) {
ConstHostCollection hosts_plus = alternate_source_->getAll4(address);
hosts.insert(hosts.end(), hosts_plus.begin(), hosts_plus.end());
}
return (hosts);
}
ConstHostPtr
HostMgr::get4(const SubnetID& subnet_id, const HWAddrPtr& hwaddr,
const DuidPtr& duid) const {
ConstHostPtr host = getCfgHosts()->get4(subnet_id, hwaddr, duid);
if (!host && alternate_source_) {
LOG_DEBUG(hosts_logger, HOSTS_DBG_TRACE,
HOSTS_MGR_ALTERNATE_GET4_SUBNET_ID_HWADDR_DUID)
.arg(subnet_id)
.arg(hwaddr ? hwaddr->toText() : "(no-hwaddr)")
.arg(duid ? duid->toText() : "(duid)");
if (duid) {
host = alternate_source_->get4(subnet_id, HWAddrPtr(), duid);
}
if (!host && hwaddr) {
host = alternate_source_->get4(subnet_id, hwaddr, DuidPtr());
}
}
return (host);
}
ConstHostPtr
HostMgr::get4(const SubnetID& subnet_id,
const Host::IdentifierType& identifier_type,
const uint8_t* identifier_begin,
const size_t identifier_len) const {
ConstHostPtr host = getCfgHosts()->get4(subnet_id, identifier_type,
identifier_begin, identifier_len);
if (!host && alternate_source_) {
host = alternate_source_->get4(subnet_id, identifier_type,
identifier_begin, identifier_len);
}
return (host);
}
ConstHostPtr
HostMgr::get4(const SubnetID& subnet_id,
const asiolink::IOAddress& address) const {
ConstHostPtr host = getCfgHosts()->get4(subnet_id, address);
if (!host && alternate_source_) {
LOG_DEBUG(hosts_logger, HOSTS_DBG_TRACE,
HOSTS_MGR_ALTERNATE_GET4_SUBNET_ID_ADDRESS4)
.arg(subnet_id)
.arg(address.toText());
host = alternate_source_->get4(subnet_id, address);
}
return (host);
}
ConstHostPtr
HostMgr::get6(const SubnetID& subnet_id, const DuidPtr& duid,
const HWAddrPtr& hwaddr) const {
ConstHostPtr host = getCfgHosts()->get6(subnet_id, duid, hwaddr);
if (!host && alternate_source_) {
LOG_DEBUG(hosts_logger, HOSTS_DBG_TRACE,
HOSTS_MGR_ALTERNATE_GET6_SUBNET_ID_DUID_HWADDR)
.arg(subnet_id)
.arg(duid ? duid->toText() : "(duid)")
.arg(hwaddr ? hwaddr->toText() : "(no-hwaddr)");
if (duid) {
host = alternate_source_->get6(subnet_id, duid, HWAddrPtr());
}
if (!host && hwaddr) {
host = alternate_source_->get6(subnet_id, DuidPtr(), hwaddr);
}
}
return (host);
}
ConstHostPtr
HostMgr::get6(const IOAddress& prefix, const uint8_t prefix_len) const {
ConstHostPtr host = getCfgHosts()->get6(prefix, prefix_len);
if (!host && alternate_source_) {
LOG_DEBUG(hosts_logger, HOSTS_DBG_TRACE,
HOSTS_MGR_ALTERNATE_GET6_PREFIX)
.arg(prefix.toText())
.arg(static_cast<int>(prefix_len));
host = alternate_source_->get6(prefix, prefix_len);
}
return (host);
}
ConstHostPtr
HostMgr::get6(const SubnetID& subnet_id,
const Host::IdentifierType& identifier_type,
const uint8_t* identifier_begin,
const size_t identifier_len) const {
ConstHostPtr host = getCfgHosts()->get6(subnet_id, identifier_type,
identifier_begin, identifier_len);
if (!host && alternate_source_) {
host = alternate_source_->get6(subnet_id, identifier_type,
identifier_begin, identifier_len);
}
return (host);
}
ConstHostPtr
HostMgr::get6(const SubnetID& subnet_id,
const asiolink::IOAddress& addr) const {
ConstHostPtr host = getCfgHosts()->get6(subnet_id, addr);
if (!host && alternate_source_) {
LOG_DEBUG(hosts_logger, HOSTS_DBG_TRACE,
HOSTS_MGR_ALTERNATE_GET6_SUBNET_ID_ADDRESS6)
.arg(subnet_id)
.arg(addr.toText());
host = alternate_source_->get6(subnet_id, addr);
}
return (host);
}
void
HostMgr::add(const HostPtr& host) {
if (!alternate_source_) {
isc_throw(NoHostDataSourceManager, "unable to add new host because there is "
"no alternate host data source present");
}
alternate_source_->add(host);
}
} // end of isc::dhcp namespace
} // end of isc namespace
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