1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "mojo/public/cpp/bindings/lib/control_message_handler.h"
6
7 #include <stddef.h>
8 #include <stdint.h>
9 #include <utility>
10
11 #include "base/logging.h"
12 #include "mojo/public/cpp/bindings/lib/message_builder.h"
13 #include "mojo/public/cpp/bindings/lib/serialization.h"
14 #include "mojo/public/interfaces/bindings/interface_control_messages.mojom.h"
15
16 namespace mojo {
17 namespace internal {
18
19 // static
IsControlMessage(const Message * message)20 bool ControlMessageHandler::IsControlMessage(const Message* message) {
21 return message->header()->name == kRunMessageId ||
22 message->header()->name == kRunOrClosePipeMessageId;
23 }
24
ControlMessageHandler(uint32_t interface_version)25 ControlMessageHandler::ControlMessageHandler(uint32_t interface_version)
26 : interface_version_(interface_version) {
27 }
28
~ControlMessageHandler()29 ControlMessageHandler::~ControlMessageHandler() {
30 }
31
Accept(Message * message)32 bool ControlMessageHandler::Accept(Message* message) {
33 if (message->header()->name == kRunOrClosePipeMessageId)
34 return RunOrClosePipe(message);
35
36 NOTREACHED();
37 return false;
38 }
39
AcceptWithResponder(Message * message,MessageReceiverWithStatus * responder)40 bool ControlMessageHandler::AcceptWithResponder(
41 Message* message,
42 MessageReceiverWithStatus* responder) {
43 if (message->header()->name == kRunMessageId)
44 return Run(message, responder);
45
46 NOTREACHED();
47 return false;
48 }
49
Run(Message * message,MessageReceiverWithStatus * responder)50 bool ControlMessageHandler::Run(Message* message,
51 MessageReceiverWithStatus* responder) {
52 RunResponseMessageParamsPtr response_params_ptr(
53 RunResponseMessageParams::New());
54 response_params_ptr->reserved0 = 16u;
55 response_params_ptr->reserved1 = 0u;
56 response_params_ptr->query_version_result = QueryVersionResult::New();
57 response_params_ptr->query_version_result->version = interface_version_;
58
59 size_t size = PrepareToSerialize<RunResponseMessageParamsPtr>(
60 response_params_ptr, &context_);
61 ResponseMessageBuilder builder(kRunMessageId, size, message->request_id());
62
63 RunResponseMessageParams_Data* response_params = nullptr;
64 Serialize<RunResponseMessageParamsPtr>(response_params_ptr, builder.buffer(),
65 &response_params, &context_);
66 bool ok = responder->Accept(builder.message());
67 ALLOW_UNUSED_LOCAL(ok);
68 delete responder;
69
70 return true;
71 }
72
RunOrClosePipe(Message * message)73 bool ControlMessageHandler::RunOrClosePipe(Message* message) {
74 RunOrClosePipeMessageParams_Data* params =
75 reinterpret_cast<RunOrClosePipeMessageParams_Data*>(
76 message->mutable_payload());
77 RunOrClosePipeMessageParamsPtr params_ptr;
78 Deserialize<RunOrClosePipeMessageParamsPtr>(params, ¶ms_ptr, &context_);
79
80 return interface_version_ >= params_ptr->require_version->version;
81 }
82
83 } // namespace internal
84 } // namespace mojo
85