socket.h

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/************************************************************************
 ** This file is part of the network simulator Shawn.                  **
 ** Copyright (C) 2004-2007 by the SwarmNet (www.swarmnet.de) project  **
 ** Shawn is free software; you can redistribute it and/or modify it   **
 ** under the terms of the BSD License. Refer to the shawn-licence.txt **
 ** file in the root of the Shawn source tree for further details.     **
 ************************************************************************/
 
#pragma once
#include <config.h>
 
#ifdef SHAWN
     #include <shawn_config.h>
     #include "_apps_enable_cmake.h"
     #ifdef ENABLE_TCPIP
            #define BUILD_TCPIP
     #endif
#else
     #define BUILD_TCPIP
#endif
 
 
#ifdef BUILD_TCPIP
 
// Get Storage
#ifdef SHAWN
    #include <apps/tcpip/storage.h>
#else
    #include "storage.h"
#endif
 
#ifdef SHAWN
     namespace shawn
      { class SimulationController; }
 
     // Dummy function is called when Shawn Simulation starts. Does nothing up to now.
     extern "C" void init_tcpip( shawn::SimulationController& );
#endif
 
#include <string>
#include <map>
#include <vector>
#include <list>
#include <deque>
#include <iostream>
#include <cstddef>
 
 
struct sockaddr_in;
 
namespace tcpip
{
 
    class SocketException: public std::runtime_error
    {
    public:
        SocketException(std::string what) : std::runtime_error(what.c_str()) {}
    };
 
    class Socket
    {
        friend class Response;
    public:
        Socket(std::string host, int port);
 
        Socket(int port);
 
        ~Socket();
 
        static int getFreeSocketPort();
 
        void connect();
 
        Socket* accept(const bool create = false);
 
        void send( const std::vector<unsigned char> &buffer);
        void sendExact( const Storage & );
        std::vector<unsigned char> receive( int bufSize = 2048 );
        bool receiveExact( Storage &);
        void close();
        int port();
        void set_blocking(bool);
        bool is_blocking();
        bool has_client_connection() const;
 
        // If verbose, each send and received data is written to stderr
        bool verbose() { return verbose_; }
        void set_verbose(bool newVerbose) { verbose_ = newVerbose; }
 
    protected:
        static const int lengthLen;
 
        void receiveComplete(unsigned char * const buffer, std::size_t len) const;
        size_t recvAndCheck(unsigned char * const buffer, std::size_t len) const;
        void printBufferOnVerbose(const std::vector<unsigned char> buffer, const std::string &label) const;
 
    private:
        void init();
        static void BailOnSocketError(std::string context);
#ifdef WIN32
        static std::string GetWinsockErrorString(int err);
#endif
        bool datawaiting(int sock) const;
 
        std::string host_;
        int port_;
        int socket_;
        int server_socket_;
        bool blocking_;
 
        bool verbose_;
#ifdef WIN32
        static bool init_windows_sockets_;
        static bool windows_sockets_initialized_;
        static int instance_count_;
#endif
    };
 
}   // namespace tcpip
 
#endif // BUILD_TCPIP