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573 | // Copyright (C) 2016-2024 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/.
#include <config.h>
#include <cc/data.h>
#include <dhcpsrv/parsers/simple_parser6.h>
using namespace isc::data;
namespace isc {
namespace dhcp {
/// @brief This sets of arrays define the default values and
/// values inherited (derived) between various scopes.
///
/// Each of those is documented in @file simple_parser6.cc. This
/// is different than most other comments in Kea code. The reason
/// for placing those in .cc rather than .h file is that it
/// is expected to be one centralized place to look at for
/// the default values. This is expected to be looked at also by
/// people who are not skilled in C or C++, so they may be
/// confused with the differences between declaration and definition.
/// As such, there's one file to look at that hopefully is readable
/// without any C or C++ skills.
///
/// @{
/// @brief This table defines all global parameters in DHCPv6.
///
/// Boolean, integer, real and string types are for scalar parameters,
/// list and map types for entries.
/// Order follows global_param rule in bison grammar.
const SimpleKeywords SimpleParser6::GLOBAL6_PARAMETERS = {
{ "data-directory", Element::string },
{ "preferred-lifetime", Element::integer },
{ "min-preferred-lifetime", Element::integer },
{ "max-preferred-lifetime", Element::integer },
{ "valid-lifetime", Element::integer },
{ "min-valid-lifetime", Element::integer },
{ "max-valid-lifetime", Element::integer },
{ "renew-timer", Element::integer },
{ "rebind-timer", Element::integer },
{ "decline-probation-period", Element::integer },
{ "subnet6", Element::list },
{ "shared-networks", Element::list },
{ "interfaces-config", Element::map },
{ "lease-database", Element::map },
{ "hosts-database", Element::map },
{ "hosts-databases", Element::list },
{ "mac-sources", Element::list },
{ "relay-supplied-options", Element::list },
{ "host-reservation-identifiers", Element::list },
{ "client-classes", Element::list },
{ "option-def", Element::list },
{ "option-data", Element::list },
{ "hooks-libraries", Element::list },
{ "expired-leases-processing", Element::map },
{ "server-id", Element::map },
{ "dhcp4o6-port", Element::integer },
{ "control-sockets", Element::list },
{ "dhcp-queue-control", Element::map },
{ "dhcp-ddns", Element::map },
{ "user-context", Element::map },
{ "comment", Element::string },
{ "sanity-checks", Element::map },
{ "reservations", Element::list },
{ "config-control", Element::map },
{ "server-tag", Element::string },
{ "reservations-global", Element::boolean },
{ "reservations-in-subnet", Element::boolean },
{ "reservations-out-of-pool", Element::boolean },
{ "calculate-tee-times", Element::boolean },
{ "t1-percent", Element::real },
{ "t2-percent", Element::real },
{ "loggers", Element::list },
{ "hostname-char-set", Element::string },
{ "hostname-char-replacement", Element::string },
{ "ddns-send-updates", Element::boolean },
{ "ddns-override-no-update", Element::boolean },
{ "ddns-override-client-update", Element::boolean },
{ "ddns-replace-client-name", Element::string },
{ "ddns-generated-prefix", Element::string },
{ "ddns-qualifying-suffix", Element::string },
{ "store-extended-info", Element::boolean },
{ "statistic-default-sample-count", Element::integer },
{ "statistic-default-sample-age", Element::integer },
{ "multi-threading", Element::map },
{ "cache-threshold", Element::real },
{ "cache-max-age", Element::integer },
{ "early-global-reservations-lookup", Element::boolean },
{ "ip-reservations-unique", Element::boolean },
{ "reservations-lookup-first", Element::boolean },
{ "ddns-update-on-renew", Element::boolean },
{ "compatibility", Element::map },
{ "parked-packet-limit", Element::integer },
{ "allocator", Element::string },
{ "pd-allocator", Element::string },
{ "ddns-ttl-percent", Element::real },
{ "ddns-conflict-resolution-mode", Element::string },
{ "ddns-ttl", Element::integer },
{ "ddns-ttl-min", Element::integer },
{ "ddns-ttl-max", Element::integer },
};
/// @brief This table defines default global values for DHCPv6
///
/// Some of the global parameters defined in the global scope (i.e. directly
/// in Dhcp6) are optional. If not defined, the following values will be
/// used.
const SimpleDefaults SimpleParser6::GLOBAL6_DEFAULTS = {
// preferred-lifetime is unspecified and defaults to 0.625 of valid-lifetime.
{ "valid-lifetime", Element::integer, "7200" },
{ "decline-probation-period", Element::integer, "86400" }, // 24h
{ "dhcp4o6-port", Element::integer, "0" },
{ "server-tag", Element::string, "" },
{ "reservations-global", Element::boolean, "false" },
{ "reservations-in-subnet", Element::boolean, "true" },
{ "reservations-out-of-pool", Element::boolean, "false" },
{ "calculate-tee-times", Element::boolean, "true" },
{ "t1-percent", Element::real, ".50" },
{ "t2-percent", Element::real, ".80" },
{ "ddns-send-updates", Element::boolean, "true" },
{ "ddns-override-no-update", Element::boolean, "false" },
{ "ddns-override-client-update", Element::boolean, "false" },
{ "ddns-replace-client-name", Element::string, "never" },
{ "ddns-generated-prefix", Element::string, "myhost" },
{ "ddns-qualifying-suffix", Element::string, "" },
{ "hostname-char-set", Element::string, "[^A-Za-z0-9.-]" },
{ "hostname-char-replacement", Element::string, "" },
{ "store-extended-info", Element::boolean, "false" },
{ "statistic-default-sample-count", Element::integer, "20" },
{ "statistic-default-sample-age", Element::integer, "0" },
{ "early-global-reservations-lookup", Element::boolean, "false" },
{ "ip-reservations-unique", Element::boolean, "true" },
{ "reservations-lookup-first", Element::boolean, "false" },
{ "ddns-update-on-renew", Element::boolean, "false" },
{ "parked-packet-limit", Element::integer, "256" },
{ "allocator", Element::string, "iterative" },
{ "pd-allocator", Element::string, "iterative" },
{ "ddns-conflict-resolution-mode", Element::string, "check-with-dhcid" },
};
/// @brief This table defines all option definition parameters.
///
/// Boolean, integer, real and string types are for scalar parameters,
/// list and map types for entries.
/// Order follows option_def_param rules in bison grammar.
const SimpleKeywords SimpleParser6::OPTION6_DEF_PARAMETERS = {
{ "name", Element::string },
{ "code", Element::integer },
{ "type", Element::string },
{ "record-types", Element::string },
{ "space", Element::string },
{ "encapsulate", Element::string },
{ "array", Element::boolean, },
{ "user-context", Element::map },
{ "comment", Element::string },
{ "metadata", Element::map }
};
/// @brief This table defines default values for option definitions in DHCPv6.
///
/// Dhcp6 may contain an array called option-def that enumerates new option
/// definitions. This array lists default values for those option definitions.
const SimpleDefaults SimpleParser6::OPTION6_DEF_DEFAULTS = {
{ "record-types", Element::string, ""},
{ "space", Element::string, "dhcp6"}, // DHCP6_OPTION_SPACE
{ "array", Element::boolean, "false"},
{ "encapsulate", Element::string, "" }
};
/// @brief This table defines all option parameters.
///
/// Boolean, integer, real and string types are for scalar parameters,
/// list and map types for entries.
/// Order follows option_param rules in bison grammar.
const SimpleKeywords SimpleParser6::OPTION6_PARAMETERS = {
{ "name", Element::string },
{ "data", Element::string },
{ "code", Element::integer },
{ "space", Element::string },
{ "csv-format", Element::boolean },
{ "always-send", Element::boolean },
{ "never-send", Element::boolean },
{ "user-context", Element::map },
{ "comment", Element::string },
{ "client-classes", Element::list },
{ "metadata", Element::map }
};
/// @brief This table defines default values for options in DHCPv6.
///
/// Dhcp6 usually contains option values (option-data) defined in global,
/// subnet, class or host reservations scopes. This array lists default values
/// for those option-data declarations.
const SimpleDefaults SimpleParser6::OPTION6_DEFAULTS = {
{ "space", Element::string, "dhcp6"}, // DHCP6_OPTION_SPACE
{ "csv-format", Element::boolean, "true"},
{ "always-send", Element::boolean, "false"},
{ "never-send", Element::boolean, "false"}
};
/// @brief This table defines all subnet parameters for DHCPv6.
///
/// Boolean, integer, real and string types are for scalar parameters,
/// list and map types for entries.
/// Order follows subnet6_param rule in bison grammar.
const SimpleKeywords SimpleParser6::SUBNET6_PARAMETERS = {
{ "preferred-lifetime", Element::integer },
{ "min-preferred-lifetime", Element::integer },
{ "max-preferred-lifetime", Element::integer },
{ "valid-lifetime", Element::integer },
{ "min-valid-lifetime", Element::integer },
{ "max-valid-lifetime", Element::integer },
{ "renew-timer", Element::integer },
{ "rebind-timer", Element::integer },
{ "option-data", Element::list },
{ "pools", Element::list },
{ "pd-pools", Element::list },
{ "subnet", Element::string },
{ "interface", Element::string },
{ "interface-id", Element::string },
{ "id", Element::integer },
{ "rapid-commit", Element::boolean },
{ "client-class", Element::string },
{ "client-classes", Element::list },
{ "require-client-classes", Element::list },
{ "evaluate-additional-classes", Element::list },
{ "reservations", Element::list },
{ "reservations-global", Element::boolean },
{ "reservations-in-subnet", Element::boolean },
{ "reservations-out-of-pool", Element::boolean },
{ "relay", Element::map },
{ "user-context", Element::map },
{ "comment", Element::string },
{ "calculate-tee-times", Element::boolean },
{ "t1-percent", Element::real },
{ "t2-percent", Element::real },
{ "ddns-send-updates", Element::boolean },
{ "ddns-override-no-update", Element::boolean },
{ "ddns-override-client-update", Element::boolean },
{ "ddns-replace-client-name", Element::string },
{ "ddns-generated-prefix", Element::string },
{ "ddns-qualifying-suffix", Element::string },
{ "hostname-char-set", Element::string },
{ "hostname-char-replacement", Element::string },
{ "store-extended-info", Element::boolean },
{ "metadata", Element::map },
{ "cache-threshold", Element::real },
{ "cache-max-age", Element::integer },
{ "ddns-update-on-renew", Element::boolean },
{ "allocator", Element::string },
{ "pd-allocator", Element::string },
{ "ddns-ttl-percent", Element::real },
{ "ddns-conflict-resolution-mode", Element::string },
{ "ddns-ttl", Element::integer },
{ "ddns-ttl-min", Element::integer },
{ "ddns-ttl-max", Element::integer },
};
/// @brief This table defines default values for each IPv6 subnet.
///
/// Note: When updating this array, please also update SHARED_SUBNET6_DEFAULTS
/// below. In most cases, those two should be kept in sync, except cases
/// where a parameter can be derived from shared-networks, but is not
/// defined on global level.
const SimpleDefaults SimpleParser6::SUBNET6_DEFAULTS = {
{ "interface", Element::string, "" },
{ "rapid-commit", Element::boolean, "false" }, // rapid-commit disabled by default
{ "interface-id", Element::string, "" }
};
/// @brief This table defines default values for each IPv6 subnet that is
/// part of a shared network
///
/// This is mostly the same as @ref SUBNET6_DEFAULTS, except the parameters
/// that can be derived from shared-network, but cannot from global scope.
const SimpleDefaults SimpleParser6::SHARED_SUBNET6_DEFAULTS = {
};
/// @brief This table defines default values for each IPv6 shared network.
const SimpleDefaults SimpleParser6::SHARED_NETWORK6_DEFAULTS = {
{ "interface", Element::string, "" },
{ "interface-id", Element::string, "" },
{ "rapid-commit", Element::boolean, "false" } // rapid-commit disabled by default
};
/// @brief List of parameters that can be inherited from the global to subnet6 scope.
///
/// Some parameters may be defined on both global (directly in Dhcp6) and
/// subnet (Dhcp6/subnet6/...) scope. If not defined in the subnet scope,
/// the value is being inherited (derived) from the global scope. This
/// array lists all of such parameters.
///
/// This list is also used for inheriting from global to shared networks
/// and from shared networks to subnets within it.
const ParamsList SimpleParser6::INHERIT_TO_SUBNET6 = {
"preferred-lifetime",
"min-preferred-lifetime",
"max-preferred-lifetime",
"rebind-timer",
"relay",
"renew-timer",
"valid-lifetime",
"min-valid-lifetime",
"max-valid-lifetime",
"calculate-tee-times",
"t1-percent",
"t2-percent",
"store-extended-info",
"cache-threshold",
"cache-max-age",
"allocator",
"pd-allocator"
};
/// @brief This table defines all pool parameters.
///
/// Boolean, integer, real and string types are for scalar parameters,
/// list and map types for entries.
/// Order follows pool_param rules in bison grammar.
const SimpleKeywords SimpleParser6::POOL6_PARAMETERS = {
{ "pool", Element::string },
{ "pool-id", Element::integer },
{ "option-data", Element::list },
{ "client-class", Element::string },
{ "client-classes", Element::list },
{ "require-client-classes", Element::list },
{ "evaluate-additional-classes", Element::list },
{ "user-context", Element::map },
{ "comment", Element::string },
{ "metadata", Element::map }
};
/// @brief This table defines all prefix delegation pool parameters.
///
/// Boolean, integer, real and string types are for scalar parameters,
/// list and map types for entries.
/// Order follows pd_pool_param rules in bison grammar.
const SimpleKeywords SimpleParser6::PD_POOL6_PARAMETERS = {
{ "prefix", Element::string },
{ "prefix-len", Element::integer },
{ "delegated-len", Element::integer },
{ "pool-id", Element::integer },
{ "option-data", Element::list },
{ "client-class", Element::string },
{ "client-classes", Element::list },
{ "require-client-classes", Element::list },
{ "evaluate-additional-classes", Element::list },
{ "excluded-prefix", Element::string },
{ "excluded-prefix-len", Element::integer },
{ "user-context", Element::map },
{ "comment", Element::string },
{ "metadata", Element::map }
};
/// @brief This table defines all shared network parameters for DHCPv6.
///
/// Boolean, integer, real and string types are for scalar parameters,
/// list and map types for entries.
/// Order follows shared_network_param rule in bison grammar.
const SimpleKeywords SimpleParser6::SHARED_NETWORK6_PARAMETERS = {
{ "name", Element::string },
{ "subnet6", Element::list },
{ "interface", Element::string },
{ "interface-id", Element::string },
{ "renew-timer", Element::integer },
{ "rebind-timer", Element::integer },
{ "option-data", Element::list },
{ "relay", Element::map },
{ "reservations-global", Element::boolean },
{ "reservations-in-subnet", Element::boolean },
{ "reservations-out-of-pool", Element::boolean },
{ "client-class", Element::string },
{ "client-classes", Element::list },
{ "require-client-classes", Element::list },
{ "evaluate-additional-classes", Element::list },
{ "preferred-lifetime", Element::integer },
{ "min-preferred-lifetime", Element::integer },
{ "max-preferred-lifetime", Element::integer },
{ "rapid-commit", Element::boolean },
{ "valid-lifetime", Element::integer },
{ "min-valid-lifetime", Element::integer },
{ "max-valid-lifetime", Element::integer },
{ "user-context", Element::map },
{ "comment", Element::string },
{ "calculate-tee-times", Element::boolean },
{ "t1-percent", Element::real },
{ "t2-percent", Element::real },
{ "ddns-send-updates", Element::boolean },
{ "ddns-override-no-update", Element::boolean },
{ "ddns-override-client-update", Element::boolean },
{ "ddns-replace-client-name", Element::string },
{ "ddns-generated-prefix", Element::string },
{ "ddns-qualifying-suffix", Element::string },
{ "hostname-char-set", Element::string },
{ "hostname-char-replacement", Element::string },
{ "store-extended-info", Element::boolean },
{ "metadata", Element::map },
{ "cache-threshold", Element::real },
{ "cache-max-age", Element::integer },
{ "ddns-update-on-renew", Element::boolean },
{ "allocator", Element::string },
{ "pd-allocator", Element::string },
{ "ddns-ttl-percent", Element::real },
{ "ddns-conflict-resolution-mode", Element::string },
{ "ddns-ttl", Element::integer },
{ "ddns-ttl-min", Element::integer },
{ "ddns-ttl-max", Element::integer },
};
/// @brief This table defines default values for interfaces for DHCPv6.
const SimpleDefaults SimpleParser6::IFACE6_DEFAULTS = {
{ "re-detect", Element::boolean, "true" }
};
/// @brief This table defines default values for dhcp-queue-control in DHCPv6.
const SimpleDefaults SimpleParser6::DHCP_QUEUE_CONTROL6_DEFAULTS = {
{ "enable-queue", Element::boolean, "false"},
{ "queue-type", Element::string, "kea-ring6"},
{ "capacity", Element::integer, "64"}
};
/// @brief This table defines default values for multi-threading in DHCPv6.
const SimpleDefaults SimpleParser6::DHCP_MULTI_THREADING6_DEFAULTS = {
{ "enable-multi-threading", Element::boolean, "true" },
{ "thread-pool-size", Element::integer, "0" },
{ "packet-queue-size", Element::integer, "64" }
};
/// @brief This defines default values for sanity checking for DHCPv6.
const SimpleDefaults SimpleParser6::SANITY_CHECKS6_DEFAULTS = {
{ "lease-checks", Element::string, "warn" }
};
/// @}
/// ---------------------------------------------------------------------------
/// --- end of default values -------------------------------------------------
/// ---------------------------------------------------------------------------
size_t SimpleParser6::setAllDefaults(ElementPtr global) {
size_t cnt = 0;
// Set global defaults first.
cnt = setDefaults(global, GLOBAL6_DEFAULTS);
// Now set the defaults for each specified option definition
ConstElementPtr option_defs = global->get("option-def");
if (option_defs) {
for (auto const& option_def : option_defs->listValue()) {
cnt += SimpleParser::setDefaults(option_def, OPTION6_DEF_DEFAULTS);<--- Consider using std::accumulate algorithm instead of a raw loop.
}
}
// Set the defaults for option data
ConstElementPtr options = global->get("option-data");
if (options) {
for (auto const& single_option : options->listValue()) {
cnt += SimpleParser::setDefaults(single_option, OPTION6_DEFAULTS);<--- Consider using std::accumulate algorithm instead of a raw loop.
}
}
// Now set the defaults for defined subnets
ConstElementPtr subnets = global->get("subnet6");
if (subnets) {
cnt += setListDefaults(subnets, SUBNET6_DEFAULTS);
}
// Set the defaults for interfaces config
ConstElementPtr ifaces_cfg = global->get("interfaces-config");
if (ifaces_cfg) {
ElementPtr mutable_cfg = boost::const_pointer_cast<Element>(ifaces_cfg);
cnt += setDefaults(mutable_cfg, IFACE6_DEFAULTS);
}
// Set defaults for shared networks
ConstElementPtr shared = global->get("shared-networks");
if (shared) {
for (auto const& net : shared->listValue()) {
cnt += setDefaults(net, SHARED_NETWORK6_DEFAULTS);
ConstElementPtr subs = net->get("subnet6");
if (subs) {
cnt += setListDefaults(subs, SHARED_SUBNET6_DEFAULTS);
}
}
}
// Set the defaults for dhcp-queue-control. If the element isn't there
// we'll add it.
ConstElementPtr queue_control = global->get("dhcp-queue-control");
ElementPtr mutable_cfg;
if (queue_control) {
mutable_cfg = boost::const_pointer_cast<Element>(queue_control);
} else {
mutable_cfg = Element::createMap();
global->set("dhcp-queue-control", mutable_cfg);
}
cnt += setDefaults(mutable_cfg, DHCP_QUEUE_CONTROL6_DEFAULTS);
// Set the defaults for multi-threading. If the element isn't there
// we'll add it.
ConstElementPtr multi_threading = global->get("multi-threading");
if (multi_threading) {
mutable_cfg = boost::const_pointer_cast<Element>(multi_threading);
} else {
mutable_cfg = Element::createMap();
global->set("multi-threading", mutable_cfg);
}
cnt += setDefaults(mutable_cfg, DHCP_MULTI_THREADING6_DEFAULTS);
// Set the defaults for sanity-checks. If the element isn't
// there we'll add it.
ConstElementPtr sanity_checks = global->get("sanity-checks");
if (sanity_checks) {
mutable_cfg = boost::const_pointer_cast<Element>(sanity_checks);
} else {
mutable_cfg = Element::createMap();
global->set("sanity-checks", mutable_cfg);
}
cnt += setDefaults(mutable_cfg, SANITY_CHECKS6_DEFAULTS);
return (cnt);
}
size_t SimpleParser6::deriveParameters(ElementPtr global) {
size_t cnt = 0;
// Now derive global parameters into subnets.
ConstElementPtr subnets = global->get("subnet6");
if (subnets) {
for (auto const& single_subnet : subnets->listValue()) {
cnt += SimpleParser::deriveParams(global, single_subnet,
INHERIT_TO_SUBNET6);
}
}
// Deriving parameters for shared networks is a bit more involved.
// First, the shared-network level derives from global, and then
// subnets within derive from it.
ConstElementPtr shared = global->get("shared-networks");
if (shared) {
for (auto const& net : shared->listValue()) {
// First try to inherit the parameters from shared network,
// if defined there.
// Then try to inherit them from global.
cnt += SimpleParser::deriveParams(global, net,
INHERIT_TO_SUBNET6);
// Now we need to go thrugh all the subnets in this net.
subnets = net->get("subnet6");
if (subnets) {
for (auto const& single_subnet : subnets->listValue()) {
cnt += SimpleParser::deriveParams(net, single_subnet,<--- Consider using std::accumulate algorithm instead of a raw loop.
INHERIT_TO_SUBNET6);
}
}
}
}
return (cnt);
}
} // namespace dhcp
} // namespace isc
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