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/*
* Copyright (c) 2014, Ford Motor Company
* 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.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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
* 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.
*/
#include "protocol_handler/protocol_payload.h"
#include <climits>
#include "utils/bitstream.h"
#include "utils/macro.h"
namespace {
// Protocol header field sizes
static const size_t kRpcTypeBits = 4;
static const size_t kRpcFunctionIdBits = 32 - kRpcTypeBits;
static const size_t kCorrelationIdBits = 32;
static const size_t kJsonSizeBits = 32;
static const size_t PayloadHeaderBits =
kRpcTypeBits + kRpcFunctionIdBits + kCorrelationIdBits + kJsonSizeBits;
}
namespace protocol_handler {
void Extract(utils::BitStream* bs, ProtocolPayloadHeaderV2* headerv2) {
DCHECK(bs && headerv2);
if (headerv2 && bs && *bs) {
uint8_t rpc_type;
utils::Extract(bs, &rpc_type, kRpcTypeBits);
headerv2->rpc_type = RpcTypeFromByte(rpc_type);
if (headerv2->rpc_type == kRpcTypeReserved) {
bs->MarkBad();
return;
}
utils::Extract(bs, &headerv2->rpc_function_id, kRpcFunctionIdBits);
utils::Extract(bs, &headerv2->correlation_id); // kCorrelationIdBits
utils::Extract(bs, &headerv2->json_size); // kJsonSizeBits
}
}
void Extract(utils::BitStream* bs,
ProtocolPayloadV2* payload,
size_t payload_size) {
DCHECK(bs && payload);
if (payload && bs && *bs) {
Extract(bs, &payload->header);
utils::Extract(bs, &payload->json, payload->header.json_size);
size_t data_size =
payload_size - payload->header.json_size - PayloadHeaderBits / CHAR_BIT;
utils::Extract(bs, &payload->data, data_size);
}
}
std::ostream& operator<<(std::ostream& os,
const ProtocolPayloadHeaderV2& payload_header) {
return os << "(ProtocolPayloadHeaderV2"
<< " rpc_type: " << payload_header.rpc_type
<< ", rpc_function_id: " << payload_header.rpc_function_id
<< ", correlation_id: " << payload_header.correlation_id
<< ", json_size: " << payload_header.json_size << ")";
}
std::ostream& operator<<(std::ostream& os, const ProtocolPayloadV2& payload) {
return os << "(ProtocolPayloadV2"
<< " header: " << payload.header
<< ", json (bytes): " << payload.json.size()
<< ", data (bytes): " << payload.data.size() << ")";
}
size_t ProtocolPayloadV2SizeBits() {
return PayloadHeaderBits;
}
} // namespace protocol_handler
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