ServerSocketIODevice.h

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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4; -*-
// vim: set shiftwidth=4 softtabstop=4 expandtab:
/*
 ********************************************************************
 ** NIDAS: NCAR In-situ Data Acquistion Software
 **
 ** 2007, Copyright University Corporation for Atmospheric Research
 **
 ** 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.
 **
 ** The LICENSE.txt file accompanying this software contains
 ** a copy of the GNU General Public License. If it is not found,
 ** write to the Free Software Foundation, Inc.,
 ** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 **
 ********************************************************************
*/
#ifndef NIDAS_CORE_SERVERSOCKETIODEVICE_H
#define NIDAS_CORE_SERVERSOCKETIODEVICE_H

#include "IODevice.h"
#include <nidas/util/Socket.h>
#include <nidas/util/ParseException.h>
#include <nidas/util/auto_ptr.h>


namespace nidas { namespace core {

class ServerSocketIODevice : public IODevice {

public:

    ServerSocketIODevice();

    virtual ~ServerSocketIODevice();

    int getReadFd() const
    {
    if (_socket) return _socket->getFd();
    return -1;
    }

    int getWriteFd() const {
    if (_socket) return _socket->getFd();
    return -1;
    }

    void open(int flags)
    throw(nidas::util::IOException,nidas::util::InvalidParameterException);

    size_t read(void *buf, size_t len) throw(nidas::util::IOException)
    {
        return _socket->recv(buf,len);
    }

    size_t read(void *buf, size_t len, int msecTimeout) throw(nidas::util::IOException)
    {
    size_t l = 0;
    try {
        _socket->setTimeout(msecTimeout);
        l = _socket->recv(buf,len,msecTimeout);
        _socket->setTimeout(0);
    }
    catch(const nidas::util::IOException& e) {
        _socket->setTimeout(0);
        throw e;
        }
    return l;
    }

    size_t write(const void *buf, size_t len) throw(nidas::util::IOException)
    {
        return _socket->send(buf,len);
    }

    /*
    * Perform an ioctl on the device. Not necessary for a socket,
    * and will throw an IOException.
    */
    void ioctl(int, void*, size_t) throw(nidas::util::IOException)
    {
        throw nidas::util::IOException(getName(),
        "ioctl","not supported on SocketIODevice");
    }

    void close() throw(nidas::util::IOException);

    void setTcpNoDelay(bool val) throw(nidas::util::IOException)
    {
        _tcpNoDelay = val;
    }

    bool getTcpNoDelay() throw(nidas::util::IOException)
    {
    return _tcpNoDelay;
    }

protected:

    void closeServerSocket() throw(nidas::util::IOException);

private:

    int _addrtype;

    std::string _unixPath;

    int _sockPort;

    nidas::util::auto_ptr<nidas::util::SocketAddress> _sockAddr;

    nidas::util::ServerSocket* _serverSocket;

    nidas::util::Socket* _socket;

    bool _tcpNoDelay;

    ServerSocketIODevice(const ServerSocketIODevice&);

    ServerSocketIODevice& operator=(const ServerSocketIODevice&);

};

}}  // namespace nidas namespace core

#endif