network.h

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/*
    Ishtar - A network transparent read/write interface with
    probing and enumeration support.
    network part : convenient cross-platform packaging for tcp/ip networking
    Copyright (C) 2003-2005 Stephane Magnenat <stephane at magnenat dot net>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef __ISHTAR_NETWORK_H
#define __ISHTAR_NETWORK_H

#include "stream.h"
#ifndef WIN32
    #include <arpa/inet.h>
    #include <netinet/in.h>
#else
    #ifndef INADDR_ANY
    #define INADDR_ANY 0x00000000
    #endif
#endif
#include <string>
#include <list>

namespace Ishtar
{
    class TCPIPAddress
    {
    public:

        UInt32 address;
    

        UInt16 port;
    
    public:
        TCPIPAddress(UInt32 addr = INADDR_ANY, UInt16 prt = 0)
        {
            address = addr;
            port = prt;
        }
    
        bool operator==(const TCPIPAddress& o) const
        {
            return address==o.address && port==o.port;
        }
        bool operator<(const TCPIPAddress& o) const
        {
            return address<o.address || (address==o.address && port<o.port);
        }
        std::string format() const;
        bool valid() const { return address != INADDR_ANY && port != 0; }
    };
    
    class SocketHelper
    {
    private:
    #ifndef WIN32

        void (*oldHandler)(int);
    #endif
    
    public:
        SocketHelper();
        ~SocketHelper();
    
        static TCPIPAddress resolve(const std::string &name, UInt16 defPort);
    };
    
    extern SocketHelper socketHelper;
    
    class Socket: public OutputStream, public InputStream
    {
    protected:
        friend class NetworkClient;
        friend class NetworkServer;
        TCPIPAddress remoteAddress;
        int socket;
        unsigned char *sendBuffer;
        size_t bufferSize;
        size_t bufferPos;
        bool connected;
        
    protected:
        void send(const void *data, Size size);
    
    public:
        Socket();
        virtual ~Socket();
        virtual void write(const void *data, const Size size);
        virtual void flush(void);
        virtual void read(void *data, Size size);
        std::string getRemoteName(void) { return remoteAddress.format(); }
        bool isConnected(void) { return connected; }
        void disconnect(void) { connected = false; }
    };
    
    class NetworkClient
    {
    protected:
        Socket *socket;
    
    public:
        NetworkClient(const std::string &host, UInt16 port);
        virtual ~NetworkClient();
    
        void run(void);
        bool step(bool block = false, long timeout = 0);

    protected:
        virtual void incomingData(Socket *socket) = 0;
        virtual void connectionClosed(Socket *socket) = 0;
    };
    
    class NetworkServer
    {
    private:
        Socket *serverSocket;
        std::list<Socket *> clients;
        
    private:
        void closeSocket(Socket *s);
        
    public:
        NetworkServer(UInt16 port);
        virtual ~NetworkServer() { }
    
        void run(void);
        void step(bool block = false, long timeout = 0);

    protected:
        virtual void incomingData(Socket *socket) = 0;
        virtual void incomingConnection(Socket *socket) = 0;
        virtual void connectionClosed(Socket *socket) = 0;
    };
}

#endif

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