/**
* 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"
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), no_payload(true) {}
template<typename MsgType,
typename = typename std::enable_if<
!std::is_same<MsgType, MsgBase>::value &&
!std::is_same<MsgType, bytearray_t>::value &&
!std::is_same<MsgType, DataStream>::value>::type>
MsgBase(const MsgType &msg): magic(0x0) {
set_opcode(MsgType::opcode);
set_payload(std::move(msg.serialized));
}
MsgBase(const MsgBase &other):
magic(other.magic),
opcode(other.opcode),
length(other.length),
#ifndef SALTICIDAE_NOCHECKSUM
checksum(other.checksum),
#endif
payload(other.payload),
no_payload(other.no_payload) {}
MsgBase(MsgBase &&other):
magic(other.magic),
opcode(std::move(other.opcode)),
length(other.length),
#ifndef SALTICIDAE_NOCHECKSUM
checksum(other.checksum),
#endif
payload(std::move(other.payload)),
no_payload(other.no_payload) {}
MsgBase(DataStream &&s): no_payload(true) {
uint32_t _magic;
opcode_t _opcode;
uint32_t _length;
#ifndef SALTICIDAE_NOCHECKSUM
uint32_t _checksum;
#endif
s >> _magic
>> _opcode
>> _length
#ifndef SALTICIDAE_NOCHECKSUM
>> _checksum
#endif
;
magic = letoh(_magic);
opcode = _opcode;
length