// Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

#ifndef CFG_RSOO_H
#define CFG_RSOO_H

#include <boost/shared_ptr.hpp>
#include <stdint.h>
#include <set>

namespace isc {
namespace dhcp {

/// @brief Represents configuration of the RSOO options for the DHCP server.
///
/// This class holds the set of RSOO-enabled options (see RFC6422). The list
/// of RSOO-enabled options is maintained by IANA and currently the option
/// 65 is officially RSSO-enabled. The list may be extended in the future
/// and this class allows for specifying any future RSOO-enabled options.
/// The administrator may also use existing options as RSOO-enabled.
class CfgRSOO {
public:

    /// @brief Constructor.
    ///
    /// It adds the default (officially) RSOO-enabled options:
    /// - OPTION_ERP_LOCAL_DOMAIN_NAME
    CfgRSOO();

    /// @brief Removes designation of all options as RSOO_enabled.
    ///
    /// This method removes all designations of all options as being RSOO-enabled.
    void clear();

    /// @brief Returns whether specific option code is RSOO-enabled.
    ///
    /// @param code Option code to check
    /// @return true, if it is allowed in Relay-Supplied Options option
    bool enabled(const uint16_t code) const;

    /// @brief Marks specified option code as RSOO-enabled.
    ///
    /// @param code option to be enabled in RSOO
    void enable(const uint16_t code);

private:

    /// @brief Contains a set of options that are allowed in RSOO option
    ///
    /// RSOO stands for Relay-Supplied Options option. This is an option that
    /// is inserted by the relay agent with the intention that the server will
    /// echo those options back to the client. Only those options marked as
    /// RSOO-enabled may appear in the RSOO. Currently only option 65 is marked
    /// as such, but more options may be added in the future. See RFC6422 for details.
    std::set<uint16_t> rsoo_options_;

};

/// @name Pointers to the @c CfgRSOO objects.
//@{
/// @brief Pointer to the Non-const object.
typedef boost::shared_ptr<CfgRSOO> CfgRSOOPtr;

/// @brief Pointer to the const object.
typedef boost::shared_ptr<const CfgRSOO> ConstCfgRSOOPtr;

//@}

}
}

#endif // CFG_RSOO_H