// Copyright 2018 Proyectos y Sistemas de Mantenimiento SL (eProsima).
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef TCP_TRANSPORT_DESCRIPTOR_H
#define TCP_TRANSPORT_DESCRIPTOR_H

#include <fastrtps/transport/SocketTransportDescriptor.h>

namespace eprosima {
namespace fastrtps {
namespace rtps {

/**
 * Transport configuration
 * @ingroup TRANSPORT_MODULE
 */
typedef struct TCPTransportDescriptor : public SocketTransportDescriptor
{
    struct TLSConfig
    {
        enum TLSOptions : uint32_t
        {
            NONE                    = 0,      // 0000 0000 0000
            DEFAULT_WORKAROUNDS     = 1 << 0, // 0000 0000 0001
            NO_COMPRESSION          = 1 << 1, // 0000 0000 0010
            NO_SSLV2                = 1 << 2, // 0000 0000 0100
            NO_SSLV3                = 1 << 3, // 0000 0000 1000
            NO_TLSV1                = 1 << 4, // 0000 0001 0000
            NO_TLSV1_1              = 1 << 5, // 0000 0010 0000
            NO_TLSV1_2              = 1 << 6, // 0000 0100 0000
            NO_TLSV1_3              = 1 << 7, // 0000 1000 0000
            SINGLE_DH_USE           = 1 << 8  // 0001 0000 0000
        };

        enum TLSVerifyMode : uint8_t
        {
            UNUSED                      = 0,      // 0000 0000
            VERIFY_NONE                 = 1 << 0, // 0000 0001
            VERIFY_PEER                 = 1 << 1, // 0000 0010
            VERIFY_FAIL_IF_NO_PEER_CERT = 1 << 2, // 0000 0100
            VERIFY_CLIENT_ONCE          = 1 << 3  // 0000 1000
        };

        enum TLSHandShakeRole : uint8_t
        {
            DEFAULT                     = 0,      // 0000 0000
            CLIENT                      = 1 << 0, // 0000 0001
            SERVER                      = 1 << 1  // 0000 0010
        };

        std::string password;
        uint32_t options;
        std::string cert_chain_file;
        std::string private_key_file;
        std::string tmp_dh_file;
        std::string verify_file;
        uint8_t verify_mode;
        std::vector<std::string> verify_paths;
        bool default_verify_path = false; // don't invoque
        int32_t verify_depth = -1; // don't override
        std::string rsa_private_key_file;
        TLSHandShakeRole handshake_role;
        std::string server_name;

        void add_verify_mode(
                const TLSVerifyMode verify)
        {
            verify_mode |= verify;
        }

        bool get_verify_mode(
                const TLSVerifyMode verify) const
        {
            return (verify_mode & verify) == verify;
        }

        void add_option(
                const TLSOptions option)
        {
            options |= option;
        }

        bool get_option(
                const TLSOptions option) const
        {
            return (options & option) == option;
        }

        TLSConfig()
            : options(TCPTransportDescriptor::TLSConfig::TLSOptions::NONE)
            , verify_mode(TCPTransportDescriptor::TLSConfig::TLSVerifyMode::UNUSED)
            , handshake_role(DEFAULT)
        {
        }

        TLSConfig(
                const TLSConfig& t)
            : password(t.password)
            , options(t.options)
            , cert_chain_file(t.cert_chain_file)
            , private_key_file(t.private_key_file)
            , tmp_dh_file(t.tmp_dh_file)
            , verify_file(t.verify_file)
            , verify_mode(t.verify_mode)
            , verify_paths(t.verify_paths)
            , default_verify_path(t.default_verify_path)
            , verify_depth(t.verify_depth)
            , rsa_private_key_file(t.rsa_private_key_file)
            , handshake_role(t.handshake_role)
            , server_name(t.server_name)
        {
        }

        TLSConfig(
                TLSConfig&& t)
            : password(std::move(t.password))
            , options(std::move(t.options))
            , cert_chain_file(std::move(t.cert_chain_file))
            , private_key_file(std::move(t.private_key_file))
            , tmp_dh_file(std::move(t.tmp_dh_file))
            , verify_file(std::move(t.verify_file))
            , verify_mode(std::move(t.verify_mode))
            , verify_paths(std::move(t.verify_paths))
            , default_verify_path(std::move(t.default_verify_path))
            , verify_depth(std::move(t.verify_depth))
            , rsa_private_key_file(std::move(t.rsa_private_key_file))
            , handshake_role(std::move(t.handshake_role))
            , server_name(std::move(t.server_name))
        {
        }

        TLSConfig& operator =(
                const TLSConfig& t)
        {
            password = t.password;
            options = t.options;
            cert_chain_file = t.cert_chain_file;
            private_key_file = t.private_key_file;
            tmp_dh_file = t.tmp_dh_file;
            verify_file = t.verify_file;
            verify_mode = t.verify_mode;
            verify_paths = t.verify_paths;
            default_verify_path = t.default_verify_path;
            verify_depth = t.verify_depth;
            rsa_private_key_file = t.rsa_private_key_file;
            handshake_role = t.handshake_role;
            server_name = t.server_name;

            return *this;
        }

    };

    std::vector<uint16_t> listening_ports;
    uint32_t keep_alive_frequency_ms;
    uint32_t keep_alive_timeout_ms;
    uint16_t max_logical_port;
    uint16_t logical_port_range;
    uint16_t logical_port_increment;
    bool enable_tcp_nodelay;
    bool calculate_crc;
    bool check_crc;
    bool apply_security;

    TLSConfig tls_config;

    void add_listener_port(
            uint16_t port)
    {
        listening_ports.push_back(port);
    }

    RTPS_DllAPI TCPTransportDescriptor()
        : SocketTransportDescriptor(65550, 4)
    {

    }

    RTPS_DllAPI TCPTransportDescriptor(
            const TCPTransportDescriptor& /*t*/)
        : SocketTransportDescriptor(65550, 4)
    {

    }

    virtual ~TCPTransportDescriptor()
    {
    }

} TCPTransportDescriptor;

} // namespace rtps
} // namespace fastrtps
} // namespace eprosima

#endif // TCP_TRANSPORT_DESCRIPTOR_H
