Current File : //backups/router/usr/local/include/kea/dhcpsrv/srv_config.h
// Copyright (C) 2014-2024 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 DHCPSRV_CONFIG_H
#define DHCPSRV_CONFIG_H
#include <cc/cfg_to_element.h>
#include <dhcpsrv/cfg_db_access.h>
#include <dhcpsrv/cfg_duid.h>
#include <dhcpsrv/cfg_expiration.h>
#include <dhcpsrv/cfg_globals.h>
#include <dhcpsrv/cfg_host_operations.h>
#include <dhcpsrv/cfg_hosts.h>
#include <dhcpsrv/cfg_iface.h>
#include <dhcpsrv/cfg_option.h>
#include <dhcpsrv/cfg_option_def.h>
#include <dhcpsrv/cfg_rsoo.h>
#include <dhcpsrv/cfg_shared_networks.h>
#include <dhcpsrv/cfg_subnets4.h>
#include <dhcpsrv/cfg_subnets6.h>
#include <dhcpsrv/cfg_mac_source.h>
#include <dhcpsrv/cfg_consistency.h>
#include <dhcpsrv/client_class_def.h>
#include <dhcpsrv/d2_client_cfg.h>
#include <process/config_base.h>
#include <hooks/hooks_config.h>
#include <cc/data.h>
#include <cc/user_context.h>
#include <cc/simple_parser.h>
#include <util/optional.h>
#include <util/str.h>
#include <boost/shared_ptr.hpp>
#include <vector>
#include <stdint.h>
namespace isc {
namespace dhcp {
class CfgMgr;
/// @brief Convenience container for conveying DDNS behavioral parameters
/// It is intended to be created per Packet exchange using the selected
/// subnet passed into functions that require them
class DdnsParams {
public:
/// @brief Default constructor
DdnsParams() : subnet_(), d2_client_enabled_(false) {};
/// @brief Constructor for DHPCv4 subnets
///
/// @param subnet Pointer to Subnet4 instance to use for fetching
/// parameter values (typically this is the selected subnet).
/// @param d2_client_enabled flag which indicates whether or not
/// D2Client is enabled (typically the value should come from
/// global D2Client configuration).
DdnsParams(const Subnet4Ptr& subnet, bool d2_client_enabled)
: subnet_(boost::dynamic_pointer_cast<Subnet>(subnet)),
d2_client_enabled_(d2_client_enabled) {}
/// @brief Constructor for DHPCv6 subnets
///
/// @param subnet Pointer to Subnet6 instance to use for fetching
/// parameter values (typically this is the selected subnet).
/// @param d2_client_enabled flag which indicates whether or not
/// D2Client is enabled (typically the value should come from
/// global D2Client configuration).
DdnsParams(const Subnet6Ptr& subnet, bool d2_client_enabled)
: subnet_(boost::dynamic_pointer_cast<Subnet>(subnet)),
d2_client_enabled_(d2_client_enabled) {}
/// @brief Returns whether or not DHCP DDNS updating is enabled.
/// The value is the logical AND of d2_client_enabled_ and
/// the value returned by subnet_'s getDdnsSendUpdates().
///
/// @return True if updates are enabled, false otherwise or if
/// subnet_ is empty.
bool getEnableUpdates() const;
/// @brief Returns whether or not Kea should perform updates, even if
/// client requested no updates.
///
/// @return The value from the subnet_ or false if subnet_ is empty.
bool getOverrideNoUpdate() const;
/// @brief Returns whether or not Kea should perform updates, even if
/// client requested delegation.
///
/// @return The value from the subnet_ or false if subnet_ is empty.
bool getOverrideClientUpdate() const;
/// @brief Returns how Kea should handle the domain-name supplied by
/// the client.
///
/// @return The value from the subnet_ or RCM_NEVER if subnet_ is empty.
D2ClientConfig::ReplaceClientNameMode getReplaceClientNameMode() const;
/// @brief Returns the Prefix Kea should use when generating domain-names.
///
/// @return The value from the subnet_ or an empty string if subnet_ is empty.
std::string getGeneratedPrefix() const;
/// @brief Returns the suffix Kea should use when to qualify partial
/// domain-names.
///
/// @return The value from the subnet_ or an empty string if subnet_ is empty.
std::string getQualifyingSuffix() const;
/// @brief Returns the regular expression describing invalid characters
/// for client hostnames. If empty, host name scrubbing should not be done.
///
/// @return The value from the subnet_ or an empty string if subnet_ is empty.
std::string getHostnameCharSet() const;
/// @brief Returns the string to replace invalid characters when scrubbing
/// hostnames. Meaningful only if hostname_char_set_ is not empty.
///
/// @return The value from the subnet_ or an empty string if subnet_ is empty.
std::string getHostnameCharReplacement() const;
/// @brief Returns a regular expression string sanitizer
///
/// If the value returned by getHostnameCharSet() is not empty, then it is
/// used in conjunction the value returned by getHostnameCharReplacment()
/// (which may be empty) to create and return a StringSanitizer instance.
/// Otherwise it will return an empty pointer.
///
/// @return pointer to the StringSanitizer instance or an empty pointer
/// @throw BadValue if the compilation fails.
isc::util::str::StringSanitizerPtr getHostnameSanitizer() const;
/// @brief Returns whether or not DNS should be updated when leases renew.
///
/// If this is true, DNS should always be updated when leases are
/// extended (i.e. renewed/rebound) even if the DNS information
/// has not changed.
///
/// @return True if updates should always be performed.
bool getUpdateOnRenew() const;
/// @brief Returns percent of lease lifetime to use for TTL
///
/// This value, if greater than zero, is used to calculate the lease lifetime
/// passed to D2 in the NCR. Otherwise the value is calculated per RFC 4702.
///
/// @return TTL percent as an Optional.
util::Optional<double> getTtlPercent() const;
/// @brief Returns the DDNS config resolution mode for kea-dhcp-ddns
///
/// This value is communicated to D2 via the NCR.
///
/// @return the DDNS conflict resolution mode
std::string getConflictResolutionMode() const;
/// @brief Returns the subnet-id of the subnet associated with these parameters
///
/// @return value of subnet-id (or 0 if no subnet is associated)
SubnetID getSubnetId() const {
if (subnet_) {
return (subnet_->getID());
} else {
return (0);
}
}
private:
/// @brief Subnet from which values should be fetched.
SubnetPtr subnet_;
/// @brief Flag indicating whether or not the D2Client is enabled.
bool d2_client_enabled_;
};
/// @brief Defines a pointer for DdnsParams instances.
typedef boost::shared_ptr<DdnsParams> DdnsParamsPtr;
/// @brief Specifies current DHCP configuration
///
/// @todo Migrate all other configuration parameters from cfgmgr.h here
class SrvConfig : public process::ConfigBase {
public:
/// @name Constants for selection of parameters returned by @c getConfigSummary
///
//@{
/// Nothing selected
static const uint32_t CFGSEL_NONE = 0x00000000;
/// Number of IPv4 subnets
static const uint32_t CFGSEL_SUBNET4 = 0x00000001;
/// Number of IPv6 subnets
static const uint32_t CFGSEL_SUBNET6 = 0x00000002;
/// Number of enabled ifaces
static const uint32_t CFGSEL_IFACE4 = 0x00000004;
/// Number of v6 ifaces
static const uint32_t CFGSEL_IFACE6 = 0x00000008;
/// DDNS enabled/disabled
static const uint32_t CFGSEL_DDNS = 0x00000010;
/// Number of all subnets
static const uint32_t CFGSEL_SUBNET = 0x00000003;
/// Configured globals
static const uint32_t CFGSEL_GLOBALS = 0x00000020;
/// Config control info
static const uint32_t CFGSEL_CFG_CTL = 0x00000040;
/// IPv4 related config
static const uint32_t CFGSEL_ALL4 = 0x00000035;
/// IPv6 related config
static const uint32_t CFGSEL_ALL6 = 0x0000003A;
/// Whole config
static const uint32_t CFGSEL_ALL = 0xFFFFFFFF;
//@}
/// @brief Default constructor.
///
/// This constructor sets configuration sequence number to 0.
SrvConfig();
/// @brief Constructor.
///
/// Sets arbitrary configuration sequence number.
///
/// @param sequence The configuration sequence.
SrvConfig(const uint32_t sequence);
/// @brief Returns summary of the configuration in the textual format.
///
/// This method returns the brief text describing the current configuration.
/// It may be used for logging purposes, e.g. when the new configuration is
/// committed to notify a user about the changes in configuration.
///
/// @todo Currently this method uses @c CfgMgr accessors to get the
/// configuration parameters. Once these parameters are migrated from the
/// @c CfgMgr this method will have to be modified accordingly.
///
/// @todo Implement reporting a summary of interfaces being used for
/// receiving and sending DHCP messages. This will be implemented with
/// ticket #3512.
///
/// @param selection Is a bitfield which describes the parts of the
/// configuration to be returned.
///
/// @return Summary of the configuration in the textual format.
std::string getConfigSummary(const uint32_t selection) const;
/// @brief Returns configuration sequence number.
///
/// @return The configuration sequence number.
uint32_t getSequence() const {
return (sequence_);
}
/// @brief Compares configuration sequence with other sequence.
///
/// This method compares sequence numbers of two configurations for
/// equality. The sequence numbers are meant to be unique, so if
/// they are equal it means that they point to the same configuration.
///
/// @param other Configuration which sequence number should be
/// compared with the sequence number of this configuration.
///
/// @return true if sequence numbers are equal.
bool sequenceEquals(const SrvConfig& other);
/// @brief Returns non-const pointer to interface configuration.
///
/// This function returns a non-const pointer to the interface
/// configuration.
///
/// @return Object representing configuration of interfaces.
CfgIfacePtr getCfgIface() {
return (cfg_iface_);
}
/// @brief Returns const pointer to interface configuration.
///
/// This function returns a const pointer to the interface
/// configuration.
///
/// @return Object representing configuration of interfaces.
ConstCfgIfacePtr getCfgIface() const {
return (cfg_iface_);
}
/// @brief Return pointer to non-const object representing user-defined
/// option definitions.
///
/// This function returns a pointer to the object which represents the
/// user defined option definitions grouped by option space name.
///
/// @return Pointer to an object holding option definitions.
CfgOptionDefPtr getCfgOptionDef() {
return (cfg_option_def_);
}
/// @brief Returns pointer to the const object representing user-defined
/// option definitions.
///
/// This function returns a pointer to the object which represents the
/// user defined option definitions grouped by option space name.
///
/// @return Pointer to an object holding option definitions.
ConstCfgOptionDefPtr getCfgOptionDef() const {
return (cfg_option_def_);
}
/// @brief Returns pointer to the non-const object holding options.
///
/// This method returns a pointer to the object which holds instances
/// of the options to be returned to the clients belonging to any subnet.
///
/// @return Pointer to the object holding options.
CfgOptionPtr getCfgOption() {
return (cfg_option_);
}
/// @brief Returns pointer to the const object holding options.
///
/// This method returns a pointer to the object which holds instances
/// of the options to be returned to the clients belonging to any subnet.
///
/// @return Pointer to the object holding options.
const ConstCfgOptionPtr getCfgOption() const {
return (cfg_option_);
}
/// @brief Returns pointer to non-const object holding subnets configuration
/// for DHCPv4.
///
/// @return Pointer to the object holding subnets configuration for DHCPv4.
CfgSubnets4Ptr getCfgSubnets4() {
return (cfg_subnets4_);
}
/// @brief Returns pointer to non-const object holding configuration of
/// shared networks in DHCPv4;
///
/// @return Pointer to the object holding shared networks configuration
/// for DHCPv4.
CfgSharedNetworks4Ptr getCfgSharedNetworks4() const {
return (cfg_shared_networks4_);
}
/// @brief Returns pointer to non-const object holding configuration of
/// shared networks in DHCPv6.
///
/// @return Pointer to the object holding shared networks configuration
/// for DHCPv6.
CfgSharedNetworks6Ptr getCfgSharedNetworks6() const {
return (cfg_shared_networks6_);
}
/// @brief Returns pointer to const object holding subnets configuration for
/// DHCPv4.
///
/// @return Pointer to the object holding subnets configuration for DHCPv4.
ConstCfgSubnets4Ptr getCfgSubnets4() const {
return (cfg_subnets4_);
}
/// @brief Returns pointer to non-const object holding subnets configuration
/// for DHCPv6.
///
/// @return Pointer to the object holding subnets configuration for DHCPv6.
CfgSubnets6Ptr getCfgSubnets6() {
return (cfg_subnets6_);
}
/// @brief Returns pointer to const object holding subnets configuration for
/// DHCPv6.
///
/// @return Pointer to the object holding subnets configuration for DHCPv6.
ConstCfgSubnets6Ptr getCfgSubnets6() const {
return (cfg_subnets6_);
}
/// @brief Returns pointer to the non-const objects representing host
/// reservations for different IPv4 and IPv6 subnets.
///
/// @return Pointer to the non-const object holding host reservations.
CfgHostsPtr getCfgHosts() {
return (cfg_hosts_);
}
/// @brief Returns pointer to the const objects representing host
/// reservations for different IPv4 and IPv6 subnets.
///
/// @return Pointer to the const object holding host reservations.
ConstCfgHostsPtr getCfgHosts() const {
return (cfg_hosts_);
}
/// @brief Returns pointer to the non-const object representing
/// set of RSOO-enabled options.
///
/// @return Pointer to the non-const object holding RSOO-enabled
/// options.
CfgRSOOPtr getCfgRSOO() {
return (cfg_rsoo_);
}
/// @brief Returns pointer to the const object representing set
/// of RSOO-enabled options.
///
/// @return Pointer to the const object holding RSOO-enabled options.
ConstCfgRSOOPtr getCfgRSOO() const {
return (cfg_rsoo_);
}
/// @brief Returns pointer to the object holding configuration pertaining
/// to processing expired leases.
///
/// @return Pointer to the object holding configuration pertaining to
/// processing expired leases.
CfgExpirationPtr getCfgExpiration() {
return (cfg_expiration_);
}
/// @brief Returns pointer to the const object holding configuration
/// pertaining to processing expired leases.
///
/// @return Pointer to the const object holding configuration pertaining to
/// processing expired leases.
ConstCfgExpirationPtr getCfgExpiration() const {
return (cfg_expiration_);
}
/// @brief Returns pointer to the object holding configuration of the
/// server identifier.
///
/// @return Pointer to the object holding configuration of the server
/// identifier.
CfgDUIDPtr getCfgDUID() {
return (cfg_duid_);
}
/// @brief Returns const pointer to the object holding configuration
/// of the server identifier.
///
/// @return Const pointer to the object holding configuration of the server
/// identifier.
ConstCfgDUIDPtr getCfgDUID() const {
return (cfg_duid_);
}
/// @brief Returns pointer to the object holding configuration of the
/// lease and host database connection parameters.
///
/// @return Pointer to the object holding configuration of the lease and
/// host database connection parameters.
CfgDbAccessPtr getCfgDbAccess() {
return (cfg_db_access_);
}
/// @brief Returns const pointer to the object holding configuration of
/// the lease and host database connection parameters.
///
/// @return Const pointer to the object holding configuration of the lease
/// and host database connection parameters.
ConstCfgDbAccessPtr getCfgDbAccess() const {
return (cfg_db_access_);
}
/// @brief Returns pointer to the object holding general configuration
/// for host reservations in DHCPv4.
///
/// @return Pointer to the object holding general configuration for host
/// reservations in DHCPv4.
CfgHostOperationsPtr getCfgHostOperations4() {
return (cfg_host_operations4_);
}
/// @brief Returns const pointer to the object holding general configuration
/// for host reservations in DHCPv4.
///
/// @return Const pointer to the object holding general configuration for
/// host reservations in DHCPv4.
ConstCfgHostOperationsPtr getCfgHostOperations4() const {
return (cfg_host_operations4_);
}
/// @brief Returns pointer to the object holding general configuration
/// for host reservations in DHCPv6.
///
/// @return Pointer to the object holding general configuration for host
/// reservations in DHCPv6.
CfgHostOperationsPtr getCfgHostOperations6() {
return (cfg_host_operations6_);
}
/// @brief Returns const pointer to the object holding general configuration
/// for host reservations in DHCPv6.
///
/// @return Const pointer to the object holding general configuration for
/// host reservations in DHCPv6.
ConstCfgHostOperationsPtr getCfgHostOperations6() const {
return (cfg_host_operations6_);
}
/// @brief Returns non-const pointer to object holding sanity checks flags
///
/// @return Pointer to object holding sanity checks flags
CfgConsistencyPtr getConsistency() {
return (cfg_consist_);
}
/// @brief Returns const pointer to object holding sanity checks flags
///
/// @return Const pointer to object holding sanity checks flags
ConstCfgConsistencyPtr getConsistency() const {
return (cfg_consist_);
}
//@}
/// @brief Returns non-const reference to an array that stores
/// MAC/hardware address sources.
///
/// @return non-const reference to MAC/hardware address sources
CfgMACSource& getMACSources() {
return (cfg_mac_source_);
}
/// @brief Returns const reference to an array that stores
/// MAC/hardware address sources.
///
/// @return const reference to MAC/hardware address sources
const CfgMACSource& getMACSources() const {
return (cfg_mac_source_);
}
/// @brief Returns information about control socket
///
/// @return pointer to the Element that holds control-socket map
const isc::data::ConstElementPtr getControlSocketInfo() const {
return (control_socket_);
}
/// @brief Sets information about the control socket
///
/// @param control_socket Element that holds control-socket map
void setControlSocketInfo(const isc::data::ConstElementPtr& control_socket) {
control_socket_ = control_socket;
}
/// @brief Returns DHCP queue control information
///
/// @return pointer to the DHCP queue control information
const isc::data::ConstElementPtr getDHCPQueueControl() const {
return (dhcp_queue_control_);
}
/// @brief Sets information about the dhcp queue control
///
/// @param dhcp_queue_control new dhcp queue control information
void setDHCPQueueControl(const isc::data::ConstElementPtr dhcp_queue_control) {
dhcp_queue_control_ = dhcp_queue_control;
}
/// @brief Returns DHCP multi threading information
///
/// @return pointer to the DHCP multi threading information
const isc::data::ConstElementPtr getDHCPMultiThreading() const {
return (dhcp_multi_threading_);
}
/// @brief Sets information about the dhcp multi threading
///
/// @param dhcp_multi_threading new dhcp multi threading information
void setDHCPMultiThreading(const isc::data::ConstElementPtr dhcp_multi_threading) {
dhcp_multi_threading_ = dhcp_multi_threading;
}
/// @brief Returns pointer to the dictionary of global client
/// class definitions
///
/// @return Pointer to the dictionary of global client class definitions
ClientClassDictionaryPtr getClientClassDictionary() {
return (class_dictionary_);
}
/// @brief Returns pointer to const dictionary of global client
/// class definitions
///
/// @return Pointer to const dictionary of global client class definitions
const ClientClassDictionaryPtr getClientClassDictionary() const {
return (class_dictionary_);
}
/// @brief Sets the client class dictionary
///
/// @param dictionary pointer to the new class dictionary
void setClientClassDictionary(const ClientClassDictionaryPtr& dictionary) {
class_dictionary_ = dictionary;
}
/// @brief Returns non-const reference to configured hooks libraries.
///
/// @return non-const reference to configured hooks libraries.
isc::hooks::HooksConfig& getHooksConfig() {
return (hooks_config_);
}
/// @brief Returns const reference to configured hooks libraries.
///
/// @return const reference to configured hooks libraries.
const isc::hooks::HooksConfig& getHooksConfig() const {
return (hooks_config_);
}
/// @brief Fetches the DDNS parameters for a given DHCPv4 subnet.
///
/// Creates a DdnsParams structure which retain and thereafter
/// use the given subnet to fetch DDNS behavioral parameters.
/// The values are fetched with the inheritance scope mode
/// of Network::ALL.
///
/// @param subnet DHCPv4 Subnet for which DDNS parameters are desired.
/// @return pointer to DddnParams instance
DdnsParamsPtr getDdnsParams(const Subnet4Ptr& subnet) const;
/// @brief Fetches the DDNS parameters for a given DHCPv6 subnet.
///
/// Creates a DdnsParams structure which retain and thereafter
/// use the given subnet to fetch DDNS behavioral parameters.
/// The values are fetched with the inheritance scope mode
/// of Network::ALL.
///
/// @param subnet DHCPv6 Subnet for which DDNS parameters are desired.
/// @return pointer to DddnParams instance
DdnsParamsPtr getDdnsParams(const Subnet6Ptr& subnet) const;
/// @brief Copies the current configuration to a new configuration.
///
/// This method copies the parameters stored in the configuration to
/// an object passed as parameter. The configuration sequence is not
/// copied.
///
/// @warning Some of the configuration objects are not copied at
/// this point, e.g. subnets. This is because they contain quite complex
/// data structures and they make use of pointers, so in many cases
/// the default copy constructors can't be used. Implementing this
/// requires quite a lot of time so this is left as is for now.
/// The lack of ability to copy the entire configuration makes
/// revert function of the @c CfgMgr unusable.
///
/// @param [out] new_config An object to which the configuration will
/// be copied.
void copy(SrvConfig& new_config) const;
/// @name Methods and operators used to compare configurations.
///
//@{
///
/// @brief Compares two objects for equality.
///
/// It ignores the configuration sequence number when checking for
/// equality of objects.
///
/// @param other An object to be compared with this object.
///
/// @return true if two objects are equal, false otherwise.
bool equals(const SrvConfig& other) const;
/// @brief Compares two objects for inequality.
///
/// It ignores the configuration sequence number when checking for
/// inequality of objects.
///
/// @param other An object to be compared with this object.
///
/// @return true if two objects are not equal, false otherwise.
bool nequals(const SrvConfig& other) const {
return (!equals(other));
}
/// @brief Equality operator.
///
/// It ignores the configuration sequence number when checking for
/// equality of objects.
///
/// @param other An object to be compared with this object.
///
/// @return true if two objects are equal, false otherwise.
bool operator==(const SrvConfig& other) const {
return (equals(other));
}
/// @brief other An object to be compared with this object.
///
/// It ignores the configuration sequence number when checking for
/// inequality of objects.
///
/// @param other An object to be compared with this object.
///
/// @return true if two objects are not equal, false otherwise.
bool operator!=(const SrvConfig& other) const {
return (nequals(other));
}
//@}
/// @brief Merges the configuration specified as a parameter into
/// this configuration.
///
/// This method is used when two or more configurations held in the
/// @c SrvConfig objects need to be combined into a single configuration.
/// Specifically, when the configuration backend is used, then part of
/// the server configuration comes from the configuration file and
/// stored in the staging configuration. The other part of the
/// configuration comes from the database. The configuration fetched
/// from the database is stored in a separate @c SrvConfig instance
/// and then merged into the staging configuration prior to committing
/// it.
///
/// The merging strategy depends on the underlying data being merged.
/// For example: subnets are merged using the algorithm implemented
/// in the @c CfgSubnets4. Other data structures are merged using the
/// algorithms implemented in their respective configuration
/// containers.
///
/// The general rule is that the configuration data from the @c other
/// object replaces configuration data held in this object instance.
/// The data that do not overlap between the two objects is simply
/// inserted into this configuration.
///
/// Due to the nature of the client classes, i.e. they are ordered and
/// depend on each other, individual classes are not merged. Instead,
/// the new list of classes entirely replaces the existing list. It
/// implies that client classes should not be defined in a config
/// file if there are classes defined in the config backend for this
/// server.
///
/// @warning The call to @c merge may modify the data in the @c other
/// object. Therefore, the caller must not rely on the data held
/// in the @c other object after the call to @c merge. Also, the
/// data held in @c other must not be modified after the call to
/// @c merge because it may affect the merged configuration.
///
/// The @c other parameter must be a @c SrvConfig or its derivation.
///
/// This method calls either @c merge4 or @c merge6 based on
///
/// Currently, the following parts of the configuration are merged:
/// - globals
/// - option definitions
/// - options
/// - client classes
/// - via @c merge4 or @c merge6 depending on @c CfgMgr::family_:
/// - shared networks
/// - subnets
///
/// @todo Add support for merging other configuration elements.
///
/// @param other An object holding the configuration to be merged
/// into this configuration.
virtual void merge(ConfigBase& other);
/// @brief Updates statistics.
///
/// This method calls appropriate methods in child objects that update
/// related statistics. See @ref CfgSubnets4::updateStatistics and
/// @ref CfgSubnets6::updateStatistics for details.
void updateStatistics();
/// @brief Removes statistics.
///
/// This method calls appropriate methods in child objects that remove
/// related statistics. See @ref CfgSubnets4::removeStatistics and
/// @ref CfgSubnets6::removeStatistics for details.
void removeStatistics();
/// @brief Sets decline probation-period
///
/// Probation-period is the timer, expressed, in seconds, that specifies how
/// long a lease is unavailable after reported as declined.
///
/// @param decline_timer number of seconds after declined lease is restored
void setDeclinePeriod(const uint32_t decline_timer) {
decline_timer_ = decline_timer;
}
/// @brief Returns probation-period
///
/// See @ref setDeclinePeriod for brief discussion.
///
/// @return value of probation-period, expressed in seconds
uint32_t getDeclinePeriod() const {
return (decline_timer_);
}
/// @brief Sets whether server should send back client-id in DHCPv4
///
/// This is a compatibility flag. The default (true) is compliant with
/// RFC6842. False is for backward compatibility.
///
/// @param echo should the client-id be sent or not
void setEchoClientId(const bool echo) {
echo_v4_client_id_ = echo;
}
/// @brief Returns whether server should send back client-id in DHCPv4.
///
/// @return true if client-id should be returned, false otherwise.
bool getEchoClientId() const {
return (echo_v4_client_id_);
}
/// @brief Sets DHCP4o6 IPC port
///
/// DHCPv4-over-DHCPv6 uses a UDP socket for inter-server communication,
/// this socket is bound and connected to this port and port + 1
///
/// @param port port and port + 1 to use
void setDhcp4o6Port(uint16_t port) {
dhcp4o6_port_ = port;
}
/// @brief Returns DHCP4o6 IPC port
///
/// See @ref setDhcp4o6Port for brief discussion.
///
/// @return value of DHCP4o6 IPC port
uint16_t getDhcp4o6Port() const {
return (dhcp4o6_port_);
}
/// @brief Returns pointer to the D2 client configuration
///
/// @return Pointer to the D2 client configuration
D2ClientConfigPtr getD2ClientConfig() {
return (d2_client_config_);
}
/// @brief Returns pointer to const D2 client configuration
///
/// @return Pointer to const D2 client configuration
const D2ClientConfigPtr getD2ClientConfig() const {
return (d2_client_config_);
}
/// @brief Sets the D2 client configuration
///
/// @param d2_client_config pointer to the new D2 client configuration
void setD2ClientConfig(const D2ClientConfigPtr& d2_client_config) {
d2_client_config_ = d2_client_config;
}
/// @brief Returns non-const pointer to configured global parameters.
///
/// This function returns a non-const pointer to the configured
/// global parameters.
///
/// @return Object representing configured global parameters.
CfgGlobalsPtr getConfiguredGlobals() {
return (configured_globals_);
}
/// @brief Returns const pointer to configured global parameters.
///
/// This function returns a const pointer to the configured
/// global parameters.
///
/// @return Object representing configured global parameters.
ConstCfgGlobalsPtr getConfiguredGlobals() const {
return (configured_globals_);
}
/// @brief Returns pointer to a given configured global parameter
///
/// @param name Name of the parameter to fetch.
/// @return Pointer to the parameter if it exists, otherwise an
/// empty pointer.
isc::data::ConstElementPtr getConfiguredGlobal(std::string name) const {
return (configured_globals_->get(name));
}
/// @brief Returns pointer to a given configured global parameter
///
/// @param index Index of the parameter to fetch.
/// @return Pointer to the parameter if it exists, otherwise an
/// empty pointer.
isc::data::ConstElementPtr getConfiguredGlobal(int index) const {
return (configured_globals_->get(index));
}
/// @brief Removes all configured global parameters.
///
/// @note This removes the default values too so either
/// @c applyDefaultsConfiguredGlobals and @c mergeGlobals,
/// or @c isc::data::SimpleParser::setDefaults and
/// @c extractConfiguredGlobals should be called after.
void clearConfiguredGlobals() {
configured_globals_->clear();
lenient_option_parsing_ = false;
ignore_dhcp_server_identifier_ = false;
ignore_rai_link_selection_ = false;
exclude_first_last_24_ = false;
control_socket_.reset();
d2_client_config_.reset(new D2ClientConfig());
cfg_expiration_.reset(new CfgExpiration());
dhcp_multi_threading_.reset();
cfg_consist_.reset(new CfgConsistency());
cfg_duid_.reset(new CfgDUID());
dhcp_queue_control_.reset();
}
/// @brief Applies defaults to global parameters.
///
/// @param defaults vector of (name, type, value) defaults to apply.
void applyDefaultsConfiguredGlobals(const isc::data::SimpleDefaults& defaults);
/// @brief Saves scalar elements from the global scope of a configuration.
void extractConfiguredGlobals(isc::data::ConstElementPtr config);
/// @brief Adds a parameter to the collection configured globals
///
/// @param name std::string name of the global to add.
/// @param value ElementPtr containing the value of the global.
void addConfiguredGlobal(const std::string& name, isc::data::ConstElementPtr value) {
configured_globals_->set(name, value);
}
/// @brief Conducts sanity checks on global lifetime parameters.
///
/// @param name Base name of the lifetime parameter.
void sanityChecksLifetime(const std::string& name) const;
/// @brief Conducts sanity checks on global lifetime parameters
/// before merge from the external configuration to the target one.
///
/// @param target_config Target configuration.
/// @param name Base name of the lifetime parameter.
void sanityChecksLifetime(const SrvConfig& target_config,
const std::string& name) const;
/// @brief Configures the server to allow or disallow specifying multiple
/// hosts with the same IP address/subnet.
///
/// This setting is applied in @c CfgDbAccess and @c CfgHosts. This function
/// should be called when the server is being configured using the configuration
/// file, config-set command or via the configuration backend.
///
/// @param unique Boolean value indicating if it is allowed (when false)
/// or disallowed to specify multiple hosts with the same IP reservation.
void setIPReservationsUnique(const bool unique);
/// @brief Sets whether the server does host reservations lookup before lease
/// lookup.
///
/// @param first Boolean value indicating if host reservations lookup should
/// be performed before lease lookup.
void setReservationsLookupFirst(const bool first) {
reservations_lookup_first_ = first;
}
/// @brief Returns whether the server does host reservations lookup before
/// lease lookup.
///
/// @return Boolean value indicating if host reservations lookup should be
/// performed before lease lookup.
bool getReservationsLookupFirst() const {
return (reservations_lookup_first_);
}
/// @brief Unparse a configuration object
///
/// @return a pointer to unparsed configuration
virtual isc::data::ElementPtr toElement() const;
/// @brief Set lenient option parsing compatibility flag.
///
/// @param value the boolean value to be set when configuring lenient option
/// parsing
void setLenientOptionParsing(bool const value) {
lenient_option_parsing_ = value;
}
/// @brief Get lenient option parsing compatibility flag.
///
/// @return the configured value for lenient option parsing
bool getLenientOptionParsing() const {
return lenient_option_parsing_;
}
/// @brief Set ignore DHCP Server Identifier compatibility flag.
///
/// @param value the boolean value to be set when configuring DHCP
/// Server Identifier usage preferences.
void setIgnoreServerIdentifier(bool const value) {
ignore_dhcp_server_identifier_ = value;
}
/// @brief Get ignore DHCP Server Identifier compatibility flag.
///
/// @return the configured value for DHCP Server Identifier usage preferences.
bool getIgnoreServerIdentifier() const {
return (ignore_dhcp_server_identifier_);
}
/// @brief Set ignore RAI Link Selection compatibility flag.
///
/// @param value the boolean value to be set when configuring RAI Link
/// Selection usage preferences
void setIgnoreRAILinkSelection(bool const value) {
ignore_rai_link_selection_ = value;
}
/// @brief Get ignore RAI Link Selection compatibility flag.
///
/// @return the configured value for RAI Link Selection usage preferences
bool getIgnoreRAILinkSelection() const {
return ignore_rai_link_selection_;
}
/// @brief Set exclude .0 and .255 addresses in subnets bigger than /24 flag.
///
/// @param value the boolean value to be set when excluding .0 .255 from
/// subnets bigger than /24.
void setExcludeFirstLast24(bool const value) {
exclude_first_last_24_ = value;
}
/// @brief Get exclude .0 and .255 addresses in subnets bigger than /24 flag.
///
/// @return the configured value for exclude .0 and .255 flag.
bool getExcludeFirstLast24() const {
return exclude_first_last_24_;
}
/// @brief Convenience method to propagate configuration parameters through
/// inversion of control.
///
/// To be used as a last resort when CfgMgr::instance().getCurrentCfg()
/// can't be easily called from where the configuration parameter is used,
/// usually because that particular library is lower in the dependency tree.
/// Happens on configuration commit.
void configureLowerLevelLibraries() const;
private:
/// @brief Merges the DHCPv4 configuration specified as a parameter into
/// this configuration.
///
/// This is called by @c merge() to handle v4 specifics, such as
/// networks and subnets.
///
/// @param other An object holding the configuration to be merged
/// into this configuration.
void merge4(SrvConfig& other);
/// @brief Merges the DHCPv6 configuration specified as a parameter into
/// this configuration.
///
/// This is called by @c merge() to handle v4 specifics, such as
/// networks and subnets.
///
/// @param other An object holding the configuration to be merged
/// into this configuration.
void merge6(SrvConfig& other);
/// @brief Merges the globals specified in the given configuration
/// into this configuration.
///
/// Configurable global values may be specified either via JSON
/// configuration (e.g. "echo-client-id":true) or as global parameters
/// within a configuration back end. Regardless of the source, these
/// values once provided, are stored in @c SrvConfig::configured_globals_.
/// Any such value that does not have an explicit specification should be
/// considered "unspecified" at the global scope.
///
/// This function adds the configured globals from the "other" config
/// into this config's configured globals. If a value already exists
/// in this config, it will be overwritten with the value from the
/// "other" config.
///
/// It then iterates over this merged list of globals, setting
/// any of the corresponding SrvConfig members that map to a
/// a configurable parameter (e.g. c@ SrvConfig::echo_client_id_,
/// @c SrvConfig::server_tag_).
///
/// @param other An object holding the configuration to be merged
/// into this configuration.
void mergeGlobals(SrvConfig& other);
/// @brief Merges the global maps specified in the given configuration
/// into this configuration.
///
/// Configurable global values may be specified either via JSON
/// configuration (e.g. "echo-client-id":true) or as global parameters
/// within a configuration back end. Regardless of the source, these
/// values once provided, are stored in @c SrvConfig::configured_globals_.
/// Any such value that does not have an explicit specification should be
/// considered "unspecified" at the global scope.
///
/// This function adds the configured globals from the "other" config
/// into this config's configured globals. If a value already exists
/// in this config, it will be overwritten with the value from the
/// "other" config.
///
/// It then iterates over this merged list of globals, setting
/// any of the corresponding SrvConfig members that map to a
/// a configurable parameter (e.g. c@ SrvConfig::echo_client_id_,
/// @c SrvConfig::server_tag_).
///
/// @param other An object holding the configuration to be merged
/// into this configuration.
void mergeGlobalMaps(SrvConfig& other);
/// @brief Sequence number identifying the configuration.
uint32_t sequence_;
/// @brief Interface configuration.
///
/// Used to select interfaces on which the DHCP server will listen to
/// queries.
CfgIfacePtr cfg_iface_;
/// @brief Pointer to option definitions configuration.
///
/// This object holds the user-defined option definitions grouped
/// by option space name.
CfgOptionDefPtr cfg_option_def_;
/// @brief Pointer to options (data) configuration.
///
/// This object holds the instances of the options to be sent to clients
/// connected to any subnet.
CfgOptionPtr cfg_option_;
/// @brief Pointer to subnets configuration for IPv4.
CfgSubnets4Ptr cfg_subnets4_;
/// @brief Pointer to subnets configuration for IPv6.
CfgSubnets6Ptr cfg_subnets6_;
/// @brief Pointer to IPv4 shared networks configuration.
CfgSharedNetworks4Ptr cfg_shared_networks4_;
/// @brief Pointer to IPv4 shared networks configuration.
CfgSharedNetworks6Ptr cfg_shared_networks6_;
/// @brief Pointer to the configuration for hosts reservation.
///
/// This object holds a list of @c Host objects representing host
/// reservations for different IPv4 and IPv6 subnets.
CfgHostsPtr cfg_hosts_;
/// @brief A list of configured MAC sources.
CfgMACSource cfg_mac_source_;
/// @brief Pointer to the configuration for RSOO-enabled options.
///
/// This object holds a set of RSOO-enabled options. See
/// RFC 6422 for the definition of the RSOO-enabled option.
CfgRSOOPtr cfg_rsoo_;
/// @brief Pointer to the configuration pertaining to processing of
/// expired leases.
CfgExpirationPtr cfg_expiration_;
/// @brief Pointer to the configuration of the server identifier.
CfgDUIDPtr cfg_duid_;
/// @brief Pointer to the configuration of the lease and host database
/// connection parameters.
CfgDbAccessPtr cfg_db_access_;
/// @brief Pointer to the general configuration for host reservations in
/// DHCPv4.
CfgHostOperationsPtr cfg_host_operations4_;
/// @brief Pointer to the general configuration for host reservations in
/// DHCPv6.
CfgHostOperationsPtr cfg_host_operations6_;
/// @brief Pointer to the control-socket information
isc::data::ConstElementPtr control_socket_;
/// @brief Pointer to the dhcp-queue-control information
isc::data::ConstElementPtr dhcp_queue_control_;
/// @brief Pointer to the multi-threading information
isc::data::ConstElementPtr dhcp_multi_threading_;
/// @brief Pointer to the dictionary of global client class definitions
ClientClassDictionaryPtr class_dictionary_;
/// @brief Configured hooks libraries.
isc::hooks::HooksConfig hooks_config_;
/// @brief Decline Period time
///
/// This timer specifies decline probation period, the time after a declined
/// lease is recovered back to available state. Expressed in seconds.
uint32_t decline_timer_;
/// @brief Indicates whether v4 server should send back client-id
bool echo_v4_client_id_;
/// @brief DHCP4o6 IPC port
///
/// DHCPv4-over-DHCPv6 uses a UDP socket for interserver communication,
/// this socket is bound and connected to this port and port + 1
uint16_t dhcp4o6_port_;
/// @brief Stores D2 client configuration
D2ClientConfigPtr d2_client_config_;
/// @brief Stores the global parameters specified via configuration
CfgGlobalsPtr configured_globals_;
/// @brief Pointer to the configuration consistency settings
CfgConsistencyPtr cfg_consist_;
/// @name Compatibility flags
///
//@{
/// @brief Indicates whether lenient option parsing is enabled
bool lenient_option_parsing_;
/// @brief Indicates whether DHCP server identifier option will be ignored
bool ignore_dhcp_server_identifier_;
/// @brief Indicates whether RAI link-selection suboptions will be ignored
bool ignore_rai_link_selection_;
/// @brief Indicates whether exclude .0 .255 from subnets bigger than /24.
bool exclude_first_last_24_;
//@}
/// @brief Flag which indicates if the server should do host reservations
/// lookup before lease lookup. This parameter has effect only when
/// multi-threading is disabled. If multi-threading is enabled, host
/// reservations lookup is always performed first.
/// It default to false when multi-threading is disabled.
bool reservations_lookup_first_;
};
/// @name Pointers to the @c SrvConfig object.
///
//@{
/// @brief Non-const pointer to the @c SrvConfig.
typedef boost::shared_ptr<SrvConfig> SrvConfigPtr;
/// @brief Const pointer to the @c SrvConfig.
typedef boost::shared_ptr<const SrvConfig> ConstSrvConfigPtr;
//@}
} // namespace dhcp
} // namespace isc
#endif // DHCPSRV_CONFIG_H
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