#include <vector>

namespace options {

static const char OPTION_PROTOCOL[] = "protocol";

static const char OPTION_ROLE[] = "role";

static const char OPTION_MODE[] = "mode";

static const char OPTION_HOST[] = "host";

static const char OPTION_PORT[] = "port";

static const char OPTION_PATH[] = "path";

static const char OPTION_DELAY[] = "delay";

static const char PROTOCOL_TCP[] = "tcp";

static const char PROTOCOL_UDP[] = "udp";

static const char PROTOCOL_UDS[] = "uds";

static const char PROTOCOL_SCTP[] = "sctp";

static const char ROLE_CLIENT[] = "client";

static const char ROLE_SERVER[] = "server";

static const char MODE_STREAM[] = "stream";

static const char MODE_DATAGRAM[] = "datagram";

}

class Message {

public:

	std::string data;

	Message() {

	}

	Message(const std::string& data) : data(data) {

	}

	virtual ~Message() = default;

};

class IncomingMessage : public Message {

	IncomingMessage(const std::string& data) : Message(data) {

	std::string remoteHost;

	in_port_t remotePort = 0;

	pid_t remotePID = 0;

	uid_t remoteUID = 0;

	gid_t remoteGID = 0;

};

class OutgoingMessage : public Message {

public:

	OutgoingMessage(const std::string& data) : Message(data) {

class Socket {

public:

	virtual ~Socket() = default;

	virtual void send(const OutgoingMessage& message) = 0;

	virtual const IncomingMessage receive() = 0;

};

class SocketOption {

public:

	const std::string name;

	const std::string value;

	SocketOption(const std::string name, const std::string value) : name(name), value(value) {

	}

	virtual ~SocketOption() = default;

};

using SocketOptions = std::vector<SocketOption>;

class SocketFactory {

public:

	virtual ~SocketFactory() = default;

	virtual bool canHandle(const SocketOptions& options) = 0;

	virtual std::shared_ptr<Socket> open(const SocketOptions& options) = 0;

	static std::shared_ptr<SocketFactory> find(const SocketOptions& options);

};