dgramoverstream.hpp

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#ifndef LIBSOCKET_DGRAMOVERSTREAM_H_7854202d13e741e98bb3b084eb3d6bc0
#define LIBSOCKET_DGRAMOVERSTREAM_H_7854202d13e741e98bb3b084eb3d6bc0

#include "exception.hpp"
#include "framing.hpp"
#include "socket.hpp"
#include "streamclient.hpp"

#include <memory>
#include <string>
#include <vector>

#include <netinet/ip.h>
#include <netinet/tcp.h>

/*
   The committers of the libsocket project, all rights reserved
   (c) 2016, dermesser <lbo@spheniscida.de>

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS “AS IS” AND ANY
   EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

namespace libsocket {
class dgram_over_stream {
   public:
    dgram_over_stream(void) = delete;
    dgram_over_stream(const dgram_over_stream&) = delete;
    dgram_over_stream(stream_client_socket inner);
    dgram_over_stream(std::unique_ptr<stream_client_socket> inner);

    void enable_nagle(bool enable) const;

    ssize_t sndmsg(const void* buf, size_t len);
    ssize_t rcvmsg(void* dst, size_t len);

    ssize_t sndmsg(const std::string& msg);
    ssize_t rcvmsg(std::string* dst);

    ssize_t sndmsg(const std::vector<uint8_t>& msg);
    ssize_t rcvmsg(std::vector<uint8_t>* dst);

   private:
    static const size_t RECV_BUF_SIZE = 256;

    // The underlying stream.
    std::unique_ptr<stream_client_socket> inner;
    char prefix_buffer[FRAMING_PREFIX_LENGTH];
    char RECV_BUF[RECV_BUF_SIZE];

    ssize_t receive_bytes(size_t);
    uint32_t receive_header(void);
};
}  // namespace libsocket

#endif