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/**
 * Copyright (c) 2018 Cornell University.
 *
 * Author: Ted Yin <tederminant@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _SALTICIDAE_MSG_H
#define _SALTICIDAE_MSG_H

#include <cstdint>
#include <cstring>
#include <string>
#include <vector>

#include "salticidae/type.h"
#include "salticidae/stream.h"
#include "salticidae/netaddr.h"

#ifdef __cplusplus
namespace salticidae {

template<typename OpcodeType>
class MsgBase {
    public:
    using opcode_t = OpcodeType;
    static const size_t header_size;

    private:
    /* header */
    /* all integers are encoded in little endian in the protocol */
    uint32_t magic;
    opcode_t opcode;
    uint32_t length;
#ifndef SALTICIDAE_NOCHECKSUM
    uint32_t checksum;
#endif

    mutable bytearray_t payload;
    mutable bool no_payload;

    public:
    MsgBase(): magic(0x0)