lowpanstream.h

Go to the documentation of this file.

/*
 * lowpanstream.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 LOWPANSTREAM_H_
#define LOWPANSTREAM_H_

#include "ibrcommon/thread/Conditional.h"
#include "ibrcommon/net/vaddress.h"
#include <streambuf>
#include <iostream>
#include <vector>
#include <stdint.h>

namespace ibrcommon
{
        class lowpanstream_callback
        {
        public:
                virtual ~lowpanstream_callback() { };
                virtual void send_cb(const char *buf, size_t len, const ibrcommon::vaddress &address) = 0;
        };

        class lowpanstream : public std::basic_streambuf<char, std::char_traits<char> >, public std::iostream
        {
        public:
                static const size_t BUFF_SIZE = 113;

                lowpanstream(lowpanstream_callback &callback, const ibrcommon::vaddress &address);
                virtual ~lowpanstream();

                void queue(char *buf, size_t len);

                void abort();

        protected:
                virtual int sync();
                virtual std::char_traits<char>::int_type overflow(std::char_traits<char>::int_type = std::char_traits<char>::eof());
                virtual std::char_traits<char>::int_type underflow();

                const ibrcommon::vaddress _address;

        private:
                bool _in_first_segment;
                char _out_stat;

                // Input buffer
                std::vector<char> in_buf_;
                size_t in_buf_len;
                bool in_buf_free;

                // Output buffer
                std::vector<char> out_buf_;
                std::vector<char> out2_buf_;

                // sequence number
                uint8_t in_seq_num_;
                uint8_t out_seq_num_;
                long out_seq_num_global;

                bool _abort;

                lowpanstream_callback &callback;

                ibrcommon::Conditional in_buf_cond;
        };
}
#endif /* LOWPANSTREAM_H_ */