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// Copyright (C) 2021-2024 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 CFG_GLOBALS_H
#define CFG_GLOBALS_H
#include <cc/cfg_to_element.h>
#include <cc/data.h>
#include <boost/shared_ptr.hpp>
#include <map>
#include <string>
#include <vector>
namespace isc {
namespace dhcp {
/// @brief Class to store configured global parameters.
///
/// This class provides a direct access to a global parameter value
/// using a vector as soon as the parameter name is known at compile
/// time so in constant time vs in logarithm time using a map.
class CfgGlobals : public isc::data::CfgToElement {
public:
/// Class members.
/// @brief Enumeration of global parameters.
///
/// The C++ compiler is required to start with 0 and to increment by 1
/// so gives an index.
///
/// Names taken from @c SimpleParser4::GLOBAL4_PARAMETERS and
/// @c SimpleParser6::GLOBAL6_PARAMETERS, first part with common
/// parameters followed by DHCPv4 and DHCPv6 specific parameters.
/// Keep the order, enum element names is uppercase with - replaced by _.
enum Index : int {
// Common parameters.
VALID_LIFETIME,
MIN_VALID_LIFETIME,
MAX_VALID_LIFETIME,
RENEW_TIMER,
REBIND_TIMER,
DECLINE_PROBATION_PERIOD,
DHCP4O6_PORT,
COMMENT,
SERVER_TAG,
RESERVATIONS_GLOBAL,
RESERVATIONS_IN_SUBNET,
RESERVATIONS_OUT_OF_POOL,
CALCULATE_TEE_TIMES,
T1_PERCENT,
T2_PERCENT,
HOSTNAME_CHAR_SET,
HOSTNAME_CHAR_REPLACEMENT,
DDNS_SEND_UPDATES,
DDNS_OVERRIDE_NO_UPDATE,
DDNS_OVERRIDE_CLIENT_UPDATE,
DDNS_REPLACE_CLIENT_NAME,
DDNS_GENERATED_PREFIX,
DDNS_QUALIFYING_SUFFIX,
STORE_EXTENDED_INFO,
STATISTIC_DEFAULT_SAMPLE_COUNT,
STATISTIC_DEFAULT_SAMPLE_AGE,
CACHE_THRESHOLD,
CACHE_MAX_AGE,
EARLY_GLOBAL_RESERVATIONS_LOOKUP,
IP_RESERVATIONS_UNIQUE,
RESERVATIONS_LOOKUP_FIRST,
DDNS_UPDATE_ON_RENEW,
PARKED_PACKET_LIMIT,
ALLOCATOR,
DDNS_TTL_PERCENT,
DDNS_CONFLICT_RESOLUTION_MODE,
COMPATIBILITY,
CONTROL_SOCKET,
DHCP_DDNS,
EXPIRED_LEASES_PROCESSING,
MULTI_THREADING,
SANITY_CHECKS,
DHCP_QUEUE_CONTROL,
// DHCPv4 specific parameters.
ECHO_CLIENT_ID,
MATCH_CLIENT_ID,
AUTHORITATIVE,
NEXT_SERVER,
SERVER_HOSTNAME,
BOOT_FILE_NAME,
OFFER_LIFETIME,
STASH_AGENT_OPTIONS,
// DHCPv6 specific parameters.
DATA_DIRECTORY,
PREFERRED_LIFETIME,
MIN_PREFERRED_LIFETIME,
MAX_PREFERRED_LIFETIME,
PD_ALLOCATOR,
SERVER_ID,
// Size sentinel.
SIZE
};
/// @brief Name to index map.
static const std::map<std::string, int> nameToIndex;
/// Instance members.
/// Constructor.
///
/// Create a vector of null values.
CfgGlobals();
/// @brief Get a configured parameter value by name.
///
/// @param name Name of the global parameter.
/// @return The value of the global parameter with the given name.
/// @throw NotFound if no global parameter has the given name.
isc::data::ConstElementPtr get(const std::string& name) const;
/// @brief Get a configured parameter value by index.
///
/// @param index Index of the global parameter.
/// @return The value of the global parameter with the index.
/// @throw OutOfRange if the index is out of bounds.
isc::data::ConstElementPtr get(int index) const;
/// @brief Set a configured parameter value by name.
///
/// @param name Name of the global parameter.
/// @param value Value of the configured parameter to set.
/// @throw NotFound if no global parameter has the given name.
void set(const std::string& name, isc::data::ConstElementPtr value);
/// @brief Set a configured parameter value by index.
///
/// @param index Index of the global parameter.
/// @param value Value of the configured parameter to set.
/// @throw OutOfRange if the index is out of bounds.
void set(int index, isc::data::ConstElementPtr value);
/// @brief Clear configured parameter values.
void clear();
/// @brief Type of name and value map.
typedef std::map<std::string, isc::data::ConstElementPtr> MapType;
/// @brief Returns configured parameters as a map.
///
/// @note: the map includes only set global parameters i.e.
/// ConstElementPtr values are never null.
const MapType valuesMap() const;
/// @brief Unparse configured global parameters.
///
/// @return a pointer to unparsed global parameters.
isc::data::ElementPtr toElement() const;
protected:
/// @brief Vectors of values.
std::vector<isc::data::ConstElementPtr> values_;
};
/// @brief Non-const shared pointer to a CfgGlobals instance.
typedef boost::shared_ptr<CfgGlobals> CfgGlobalsPtr;
/// @brief Const shared pointer to a CfgGlobals instance.
typedef boost::shared_ptr<const CfgGlobals> ConstCfgGlobalsPtr;
} // namespace isc::dhcp
} // namespace isc
#endif // CFG_GLOBALS_H
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