tcp_ip4.hpp

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/*
 * Copyright (C) 2013 Evidence Srl - www.evidence.eu.com
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 * 
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
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 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#ifndef TCP_IPV4_HPP_
#define TCP_IPV4_HPP_

#include <stdexcept>

#include "abstract_socket.hpp"
#include "posix_socket.hpp"
#include "address.hpp"

namespace net {
namespace ip4 {
namespace tcp {

/// Address for IPv4 TCP communications.
class address: public Address {
public:
        /**
         * @brief Constructor
         *
         * @param addr std::string containing the address (e.g., "127.0.0.1")
         * @param port Integer containing the port number (e.g., 1234)
         */
        address(const std::string& addr, int port):
                address_{addr}, port_{port}{};
        
        /**
         * @brief Get the address
         *
         * @return a std::string containing the IP address
         * (not the port number)
         */
        inline std::string getAddress() const {
                return address_;
        }

        /**
         * @brief Get the port number
         *
         * @return an integer containing the port number
         */
        inline int getPort() const {
                return port_;
        }

private:
        /// IP address
        std::string address_;
        
        /// Port number
        int port_;
};


/**
 * @brief Server for IPv4 TCP communications.
 */
class server: public AbstractSocket {
public:
        /**
         * @brief Constructor
         *
         * This constructor allocates a concrete class derived from net::AbstractSystemSocket.
         * @param max_pending_connections Number of maximum allowed pending connections
         */
        server(int max_pending_connections = 100):
            AbstractSocket{protocol(STREAM, IPv4)},
            max_pending_connections_{max_pending_connections}{}

        /**
         * @brief Constructor to accept() a TCP connection on an existing socket.
         *
         * This constructor allocates a concrete class derived from net::AbstractSystemSocket
         * and accept a TCP connection on the given (existing) TCP socket.
         * @param srv Existing TCP socket on which the new connection must be accepted.
         * @param max_pending_connections Number of maximum allowed pending connections
         */
        server(AbstractSocket* srv, int max_pending_connections = 100):
            AbstractSocket{protocol(STREAM, IPv4)},
            max_pending_connections_{max_pending_connections}
        {
                        socket_->accept((srv->getSocket()));
        }

        /**
         * @brief Method to bind the server to an address
         *
         * This method invokes the platform-specific bind() operation.
         * @param addr Address (i.e., net::ip4::tcp::address)
         * which the server must be bound to
         */
        inline void bind (const Address& addr){
                AbstractSocket::socket_->bind(addr);
        }

        /**
         * @brief Listen operation
         *
         * This method sets the number of maximum allowed pending connections.
         * This method invokes the platform-specific listen() operation.
         */
        inline void listen(){
                AbstractSocket::socket_->listen(max_pending_connections_);
        }

        /**
         * @brief Method to open the server towards a certain address
         *
         * This method calls net::ip4::tcp::server::bind() and
         * net::ip4::tcp::server::listen(). They, in turn, call
         * the platform-specific operations.
         * @param addr Address (i.e., net::ip4::tcp::address) 
         * that must be open by the server
         */
        inline void open (const Address& addr) {
                bind (addr);
                listen();
        }

private:
        /// Number of maximum allowed pending connections
        int max_pending_connections_;
};



/**
 * @brief Client for IPv4 TCP communications.
 */
class client: public AbstractSocket {
public:
        /**
         * @brief Constructor
         *
         * This constructor allocates a concrete class
         * derived from net::AbstractSystemSocket.
         */
        client():
            AbstractSocket{protocol(STREAM, IPv4)}{}
        
        /**
         * @brief Method to connect the client to an address
         *
         * This method invokes the platform-specific connect() operation.
         * @param addr Address (i.e., net::ip4::tcp::address)
         * which the client must be connected to
         */
        inline void connect (const Address& addr){
                AbstractSocket::socket_->connect(addr);
        }

        /**
         * @brief Method to open the client towards a certain address
         *
         * This method calls net::ip4::tcp::client::connect(),
         * which in turn invokes the platform-specific connect() operation.
         * @param addr Address (i.e., net::ip4::tcp::address) 
         * that must be open by the client
         */
        inline void open (const Address& addr) {
                connect(addr);
        }

};

}}} // net::ip4::tcp

#endif // TCP_IPV4_HPP_