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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/tether/message_wrapper.h"
#include <memory>
#include "base/base64url.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/memory/ptr_util.h"
#include "base/values.h"
namespace ash {
namespace tether {
namespace {
const char kJsonTypeKey[] = "type";
const char kJsonDataKey[] = "data";
std::unique_ptr<google::protobuf::MessageLite> DecodedMessageToProto(
const MessageType& type,
const std::string& decoded_message) {
switch (type) {
case MessageType::CONNECT_TETHERING_REQUEST: {
std::unique_ptr<ConnectTetheringRequest> connect_request =
std::make_unique<ConnectTetheringRequest>();
connect_request->ParseFromString(decoded_message);
return connect_request;
}
case MessageType::CONNECT_TETHERING_RESPONSE: {
std::unique_ptr<ConnectTetheringResponse> connect_response =
std::make_unique<ConnectTetheringResponse>();
connect_response->ParseFromString(decoded_message);
return connect_response;
}
case MessageType::DISCONNECT_TETHERING_REQUEST: {
std::unique_ptr<DisconnectTetheringRequest> disconnect_request =
std::make_unique<DisconnectTetheringRequest>();
disconnect_request->ParseFromString(decoded_message);
return disconnect_request;
}
case MessageType::KEEP_ALIVE_TICKLE: {
std::unique_ptr<KeepAliveTickle> keep_alive_tickle =
std::make_unique<KeepAliveTickle>();
keep_alive_tickle->ParseFromString(decoded_message);
return keep_alive_tickle;
}
case MessageType::KEEP_ALIVE_TICKLE_RESPONSE: {
std::unique_ptr<KeepAliveTickleResponse> keep_alive_tickle_response =
std::make_unique<KeepAliveTickleResponse>();
keep_alive_tickle_response->ParseFromString(decoded_message);
return keep_alive_tickle_response;
}
case MessageType::TETHER_AVAILABILITY_REQUEST: {
std::unique_ptr<TetherAvailabilityRequest> tether_request =
std::make_unique<TetherAvailabilityRequest>();
tether_request->ParseFromString(decoded_message);
return tether_request;
}
case MessageType::TETHER_AVAILABILITY_RESPONSE: {
std::unique_ptr<TetherAvailabilityResponse> tether_response =
std::make_unique<TetherAvailabilityResponse>();
tether_response->ParseFromString(decoded_message);
return tether_response;
}
default:
return nullptr;
}
}
} // namespace
// static
std::unique_ptr<MessageWrapper> MessageWrapper::FromRawMessage(
const std::string& message) {
std::optional<base::Value> json_value = base::JSONReader::Read(message);
if (!json_value) {
return nullptr;
}
const base::Value::Dict* json_dictionary = json_value->GetIfDict();
if (!json_dictionary) {
return nullptr;
}
std::optional<int> message_type = json_dictionary->FindInt(kJsonTypeKey);
if (!message_type)
return nullptr;
const std::string* encoded_message =
json_dictionary->FindString(kJsonDataKey);
if (!encoded_message)
return nullptr;
std::string decoded_message;
if (!base::Base64UrlDecode(*encoded_message,
base::Base64UrlDecodePolicy::REQUIRE_PADDING,
&decoded_message)) {
return nullptr;
}
std::unique_ptr<google::protobuf::MessageLite> proto = DecodedMessageToProto(
static_cast<MessageType>(*message_type), decoded_message);
if (!proto) {
return nullptr;
}
return base::WrapUnique(new MessageWrapper(
static_cast<MessageType>(*message_type), std::move(proto)));
}
MessageWrapper::MessageWrapper(const ConnectTetheringRequest& request)
: type_(MessageType::CONNECT_TETHERING_REQUEST),
proto_(std::make_unique<ConnectTetheringRequest>(request)) {}
MessageWrapper::MessageWrapper(const ConnectTetheringResponse& response)
: type_(MessageType::CONNECT_TETHERING_RESPONSE),
proto_(std::make_unique<ConnectTetheringResponse>(response)) {}
MessageWrapper::MessageWrapper(const DisconnectTetheringRequest& request)
: type_(MessageType::DISCONNECT_TETHERING_REQUEST),
proto_(std::make_unique<DisconnectTetheringRequest>(request)) {}
MessageWrapper::MessageWrapper(const KeepAliveTickle& tickle)
: type_(MessageType::KEEP_ALIVE_TICKLE),
proto_(std::make_unique<KeepAliveTickle>(tickle)) {}
MessageWrapper::MessageWrapper(const KeepAliveTickleResponse& response)
: type_(MessageType::KEEP_ALIVE_TICKLE_RESPONSE),
proto_(std::make_unique<KeepAliveTickleResponse>(response)) {}
MessageWrapper::MessageWrapper(const TetherAvailabilityRequest& request)
: type_(MessageType::TETHER_AVAILABILITY_REQUEST),
proto_(std::make_unique<TetherAvailabilityRequest>(request)) {}
MessageWrapper::MessageWrapper(const TetherAvailabilityResponse& response)
: type_(MessageType::TETHER_AVAILABILITY_RESPONSE),
proto_(std::make_unique<TetherAvailabilityResponse>(response)) {}
MessageWrapper::MessageWrapper(
const MessageType& type,
std::unique_ptr<google::protobuf::MessageLite> proto)
: type_(type), proto_(std::move(proto)) {}
MessageWrapper::~MessageWrapper() = default;
google::protobuf::MessageLite* MessageWrapper::GetProto() const {
return proto_.get();
}
MessageType MessageWrapper::GetMessageType() const {
return type_;
}
std::string MessageWrapper::ToRawMessage() const {
std::string encoded_message;
base::Base64UrlEncode(proto_->SerializeAsString(),
base::Base64UrlEncodePolicy::INCLUDE_PADDING,
&encoded_message);
base::Value::Dict json_dictionary;
json_dictionary.Set(kJsonTypeKey, static_cast<int>(type_));
json_dictionary.Set(kJsonDataKey, encoded_message);
std::string raw_message;
base::JSONWriter::Write(json_dictionary, &raw_message);
return raw_message;
}
} // namespace tether
} // namespace ash
|
