1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* 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 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);
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() << ")";
}
size_t ProtocolPayloadV2SizeBits() {
return PayloadHeaderBits;
}
} // namespace protocol_handler
|
