StreamBuffer.h

/*
 * Copyright (C) 2010-2012 by Marc Boris Duerner
 * Copyright (C) 2010-2010 by Aloysius Indrayanto
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef PT_SSL_StreamBuffer_H
#define PT_SSL_StreamBuffer_H

#include <Pt/Ssl/Api.h>
#include <Pt/Ssl/Context.h>
#include <Pt/StreamBuffer.h>
#include <ios>
#include <cstddef>

namespace Pt {

namespace Ssl {

class Connection;

class PT_SSL_API StreamBuffer : public BasicStreamBuffer<char>
{
    public:
        StreamBuffer(std::size_t bufferSize = 1024);

        StreamBuffer(Context& ctx, std::ios& ios, OpenMode mode, std::size_t bufferSize = 1024);

        virtual ~StreamBuffer();

        void open(Context& ctx, std::ios& ios, OpenMode mode);
        
        void setPeerName(const std::string& peerName);

        const char* currentCipher() const;

        void close();

        bool isConnected() const;

        bool writeHandshake();

        bool readHandshake(std::streamsize maxRead = 0);

        bool shutdown();

        bool isShutdown() const;

        bool isClosed() const;

        std::streamsize import(std::streamsize maxImport = 0);

    protected:
        // inheritdoc
        virtual std::streamsize showmanyc();

        // inheritdoc
        virtual std::streamsize showfull();

        // inheritdoc
        virtual int sync();
        
        // inheritdoc
        virtual int_type underflow();
        
        // inheritdoc
        virtual int_type overflow(int_type ch);

    private:
        Connection*  _connection;
        std::string  _peerName;
        std::size_t  _ibufferSize;
        char*        _ibuffer;
        std::size_t  _obufferSize;
        char*        _obuffer;

        static const int _pbmax = 4;
};

} // namespace Ssl

} // namespace Pt

#endif // PT_SSL_StreamBuffer_H