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// 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
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