diff options
Diffstat (limited to 'src/bin/netconf/simple_parser.cc')
| -rw-r--r-- | src/bin/netconf/simple_parser.cc | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/bin/netconf/simple_parser.cc b/src/bin/netconf/simple_parser.cc new file mode 100644 index 0000000..1574ddf --- /dev/null +++ b/src/bin/netconf/simple_parser.cc @@ -0,0 +1,194 @@ +// Copyright (C) 2018-2021 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 <netconf/simple_parser.h> +#include <netconf/netconf_config.h> +#include <cc/data.h> +#include <cc/dhcp_config_error.h> +#include <hooks/hooks_manager.h> +#include <hooks/hooks_parser.h> +#include <boost/foreach.hpp> + +using namespace isc::data; + +namespace isc { +namespace netconf { +/// @brief This sets of arrays define the default values in various scopes +/// of the Netconf Configuration. +/// +/// Each of those is documented in @file netconf/simple_parser.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 default values for global options. +/// +/// These are global Netconf parameters. +const SimpleDefaults NetconfSimpleParser::NETCONF_DEFAULTS = { + { "boot-update", Element::boolean, "true" }, + { "subscribe-changes", Element::boolean, "true" }, + { "validate-changes", Element::boolean, "true" } +}; + +/// @brief Supplies defaults for control-socket elements +const SimpleDefaults NetconfSimpleParser::CTRL_SOCK_DEFAULTS = { + { "socket-type", Element::string, "stdout" }, + { "socket-name", Element::string, "" }, + { "socket-url" , Element::string, "http://127.0.0.1:8000/" } +}; + +/// @brief Supplies defaults for dhcp4 managed server +const SimpleDefaults NetconfSimpleParser::DHCP4_DEFAULTS = { + { "model", Element::string, "kea-dhcp4-server" } +}; + +/// @brief Supplies defaults for dhcp6 managed server +const SimpleDefaults NetconfSimpleParser::DHCP6_DEFAULTS = { + { "model", Element::string, "kea-dhcp6-server" } +}; + +/// @brief Supplies defaults for d2 managed server +const SimpleDefaults NetconfSimpleParser::D2_DEFAULTS = { + { "model", Element::string, "kea-dhcp-ddns" } +}; + +/// @brief Supplies defaults for ca managed server +const SimpleDefaults NetconfSimpleParser::CA_DEFAULTS = { + { "model", Element::string, "kea-ctrl-agent" } +}; + +/// @brief List of parameters that can be inherited to managed-servers scope. +/// +/// Some parameters may be defined on both global (directly in Netconf) and +/// servers (Netconf/managed-servers/...) scope. If not defined in the +/// managed-servers scope, the value is being inherited (derived) from +/// the global scope. This array lists all of such parameters. +const ParamsList NetconfSimpleParser::INHERIT_TO_SERVERS = { + "boot-update", + "subscribe-changes", + "validate-changes" +}; + +/// @} + +/// --------------------------------------------------------------------------- +/// --- end of default values ------------------------------------------------- +/// --------------------------------------------------------------------------- + +size_t NetconfSimpleParser::setAllDefaults(const ElementPtr& global) { + size_t cnt = 0; + + // Set global defaults first. + cnt = setDefaults(global, NETCONF_DEFAULTS); + + ConstElementPtr servers = global->get("managed-servers"); + if (servers) { + for (auto it : servers->mapValue()) { + cnt += setServerDefaults(it.first, it.second); + } + } + + return (cnt); +} + +size_t NetconfSimpleParser::deriveParameters(ConstElementPtr global) { + size_t cnt = 0; + + // Now derive global parameters into managed-servers. + ConstElementPtr servers = global->get("managed-servers"); + if (servers) { + for (auto it : servers->mapValue()) { + ElementPtr mutable_server = + boost::const_pointer_cast<Element>(it.second); + cnt += SimpleParser::deriveParams(global, + mutable_server, + INHERIT_TO_SERVERS); + } + } + + return (cnt); +} + +size_t +NetconfSimpleParser::setServerDefaults(const std::string name, + ConstElementPtr server) { + size_t cnt = 0; + + ElementPtr mutable_server = + boost::const_pointer_cast<Element>(server); + if (name == "dhcp4") { + cnt += setDefaults(mutable_server, DHCP4_DEFAULTS); + } else if (name == "dhcp6") { + cnt += setDefaults(mutable_server, DHCP6_DEFAULTS); + } else if (name == "d2") { + cnt += setDefaults(mutable_server, D2_DEFAULTS); + } else if (name == "ca") { + cnt += setDefaults(mutable_server, CA_DEFAULTS); + } + + ConstElementPtr ctrl_sock = server->get("control-socket"); + if (!ctrl_sock) { + return (cnt); + } + ElementPtr mutable_ctrl_sock = + boost::const_pointer_cast<Element>(ctrl_sock); + cnt += setDefaults(mutable_ctrl_sock, CTRL_SOCK_DEFAULTS); + + return (cnt); +} + +void +NetconfSimpleParser::parse(const NetconfConfigPtr& ctx, + const ConstElementPtr& config, + bool check_only) { + + // User context can be done at anytime. + ConstElementPtr user_context = config->get("user-context"); + if (user_context) { + ctx->setContext(user_context); + } + + // get managed servers. + ConstElementPtr servers = config->get("managed-servers"); + if (servers) { + for (auto it : servers->mapValue()) { + ServerConfigParser server_parser; + CfgServerPtr server = server_parser.parse(it.second); + ctx->getCfgServersMap()->insert(make_pair(it.first, server)); + } + } + + // Finally, let's get the hook libs! + using namespace isc::hooks; + HooksConfig& libraries = ctx->getHooksConfig(); + ConstElementPtr hooks = config->get("hooks-libraries"); + if (hooks) { + HooksLibrariesParser hooks_parser; + hooks_parser.parse(libraries, hooks); + libraries.verifyLibraries(hooks->getPosition()); + } + + if (!check_only) { + // This occurs last as if it succeeds, there is no easy way + // revert it. As a result, the failure to commit a subsequent + // change causes problems when trying to roll back. + HooksManager::prepareUnloadLibraries(); + static_cast<void>(HooksManager::unloadLibraries()); + libraries.loadLibraries(); + } +} + +} // namespace netconf +} // namespace isc |