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diff --git a/src/bin/agent/simple_parser.h b/src/bin/agent/simple_parser.h
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+// Copyright (C) 2017-2021 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/.
+
+#ifndef AGENT_SIMPLE_PARSER_H
+#define AGENT_SIMPLE_PARSER_H
+
+#include <cc/simple_parser.h>
+#include <agent/ca_cfg_mgr.h>
+
+namespace isc {
+namespace agent {
+
+/// @brief SimpleParser specialized for Control Agent
+///
+/// This class is a @ref isc::data::SimpleParser dedicated to Control Agent.
+/// In particular, it contains all the default values for the whole
+/// agent and for the socket defaults.
+///
+/// For the actual values, see @file agent/simple_parser.cc
+class AgentSimpleParser : public isc::data::SimpleParser {
+public:
+    /// @brief Sets all defaults for Control Agent configuration
+    ///
+    /// This method sets global, option data and option definitions defaults.
+    ///
+    /// @param global scope to be filled in with defaults.
+    /// @return number of default values added
+    static size_t setAllDefaults(const isc::data::ElementPtr& global);
+
+    /// @brief Check TLS setup consistency i.e. all or none.
+    ///
+    /// @param config - Element tree structure that holds configuration.
+    /// @throw ConfigError when the configuration is not consistent.
+    void checkTlsSetup(const isc::data::ConstElementPtr& config);
+
+    /// @brief Parses the control agent configuration
+    ///
+    /// @param ctx - parsed information will be stored here
+    /// @param config - Element tree structure that holds configuration
+    /// @param check_only - if true the configuration is verified only, not applied
+    ///
+    /// @throw ConfigError if any issues are encountered.
+    void parse(const CtrlAgentCfgContextPtr& ctx,
+               const isc::data::ConstElementPtr& config,
+               bool check_only);
+
+    // see simple_parser.cc for comments for those parameters
+    static const isc::data::SimpleDefaults AGENT_DEFAULTS;
+    static const isc::data::SimpleDefaults AUTH_DEFAULTS;
+    static const isc::data::SimpleDefaults SOCKET_DEFAULTS;
+};
+
+}
+}
+#endif