src/main/c/internal/HybiPacketDecoder.h

// Copyright (c) 2013, Matt Godbolt
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are met:
// 
// Redistributions of source code must retain the above copyright notice, this 
// list of conditions and the following disclaimer.
// 
// 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 
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#pragma once

#include "seasocks/Logger.h"

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

namespace seasocks {

class HybiPacketDecoder {
    Logger& _logger;
    const std::vector<uint8_t>& _buffer;
    size_t _messageStart;
public:
    HybiPacketDecoder(Logger& logger, const std::vector<uint8_t>& buffer);

    enum {
        OPCODE_CONT = 0x0,  // Deprecated in latest hybi spec, here anyway.
        OPCODE_TEXT = 0x1,
        OPCODE_BINARY = 0x2,
        OPCODE_CLOSE = 0x8,
        OPCODE_PING = 0x9,
        OPCODE_PONG = 0xA,
    };

    enum MessageState {
        NoMessage,
        TextMessage,
        BinaryMessage,
        Error,
        Ping,
        Close
    };
    MessageState decodeNextMessage(std::vector<uint8_t>& messageOut);

    size_t numBytesDecoded() const;
};

}