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/**
* Copyright (c) 2013, 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 kCorellationIdBits = 32;
static const size_t kJsonSizeBits = 32;
static const size_t PayloadHeaderBits =
kRpcTypeBits + kRpcFunctionIdBits + kCorellationIdBits + kJsonSizeBits;
}
namespace protocol_handler {
void Extract(utils::BitStream* bs, ProtocolPayloadHeaderV2* headerv2) {
DCHECK(bs && headerv2);
if (*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->corellation_id); // kCorellationIdBits
utils::Extract(bs, &headerv2->json_size); // kJsonSizeBits
}
}
void Extract(utils::BitStream* bs, ProtocolPayloadV2* payload,
size_t payload_size) {
DCHECK(bs && payload);
if (*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;
DCHECK(data_size < payload_size); // Make sure data_size didn't underflow
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
<<", corellation_id: "<<payload_header.corellation_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()
<<")";
}
} // namespace protocol_handler
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