StreamDataSegment.h

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/*
 * StreamDataSegment.h
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */


#ifndef STREAMDATASEGMENT_H_
#define STREAMDATASEGMENT_H_

#include <ibrdtn/data/Number.h>
#include <stdlib.h>
#include <iostream>
#include <stdint.h>

namespace dtn
{
        namespace streams
        {
                class StreamDataSegment
                {
                public:
                        enum SegmentType
                        {
                                MSG_DATA_SEGMENT = 0x1,
                                MSG_ACK_SEGMENT = 0x2,
                                MSG_REFUSE_BUNDLE = 0x3,
                                MSG_KEEPALIVE = 0x4,
                                MSG_SHUTDOWN = 0x5
                        };

                        enum SegmentMark
                        {
                                MSG_MARK_BEGINN = 0x02,
                                MSG_MARK_END = 0x01
                        };

                        enum ShutdownReason
                        {
                                MSG_SHUTDOWN_NONE = 0xff,
                                MSG_SHUTDOWN_IDLE_TIMEOUT = 0x00,
                                MSG_SHUTDOWN_VERSION_MISSMATCH = 0x01,
                                MSG_SHUTDOWN_BUSY = 0x02
                        };

                        StreamDataSegment(SegmentType type, const dtn::data::Number &size); // creates a ACK or DATA segment
                        StreamDataSegment(SegmentType type = MSG_KEEPALIVE); // Creates a Keep-Alive Message
                        StreamDataSegment(ShutdownReason reason, const dtn::data::Number &reconnect = 0);  // Creates a Shutdown Message

                        virtual ~StreamDataSegment();

                        dtn::data::Number _value;
                        SegmentType _type;
                        ShutdownReason _reason;
                        uint8_t _flags;

                        friend std::ostream &operator<<(std::ostream &stream, const StreamDataSegment &seg);
                        friend std::istream &operator>>(std::istream &stream, StreamDataSegment &seg);
                };
        }
}

#endif /* STREAMDATASEGMENT_H_ */