1 //
2 // Copyright (C) 2015 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16
17 #include "update_engine/binder_service_android.h"
18
19 #include <base/bind.h>
20 #include <base/logging.h>
21 #include <binderwrapper/binder_wrapper.h>
22 #include <brillo/errors/error.h>
23 #include <utils/String8.h>
24
25 using android::binder::Status;
26 using android::os::IUpdateEngineCallback;
27 using update_engine::UpdateEngineStatus;
28
29 namespace {
ErrorPtrToStatus(const brillo::ErrorPtr & error)30 Status ErrorPtrToStatus(const brillo::ErrorPtr& error) {
31 return Status::fromServiceSpecificError(
32 1, android::String8{error->GetMessage().c_str()});
33 }
34 } // namespace
35
36 namespace chromeos_update_engine {
37
BinderUpdateEngineAndroidService(ServiceDelegateAndroidInterface * service_delegate)38 BinderUpdateEngineAndroidService::BinderUpdateEngineAndroidService(
39 ServiceDelegateAndroidInterface* service_delegate)
40 : service_delegate_(service_delegate) {}
41
SendStatusUpdate(const UpdateEngineStatus & update_engine_status)42 void BinderUpdateEngineAndroidService::SendStatusUpdate(
43 const UpdateEngineStatus& update_engine_status) {
44 last_status_ = static_cast<int>(update_engine_status.status);
45 last_progress_ = update_engine_status.progress;
46 for (auto& callback : callbacks_) {
47 callback->onStatusUpdate(last_status_, last_progress_);
48 }
49 }
50
SendPayloadApplicationComplete(ErrorCode error_code)51 void BinderUpdateEngineAndroidService::SendPayloadApplicationComplete(
52 ErrorCode error_code) {
53 for (auto& callback : callbacks_) {
54 callback->onPayloadApplicationComplete(static_cast<int>(error_code));
55 }
56 }
57
bind(const android::sp<IUpdateEngineCallback> & callback,bool * return_value)58 Status BinderUpdateEngineAndroidService::bind(
59 const android::sp<IUpdateEngineCallback>& callback, bool* return_value) {
60 callbacks_.emplace_back(callback);
61
62 const android::sp<IBinder>& callback_binder =
63 IUpdateEngineCallback::asBinder(callback);
64 auto binder_wrapper = android::BinderWrapper::Get();
65 binder_wrapper->RegisterForDeathNotifications(
66 callback_binder,
67 base::Bind(
68 base::IgnoreResult(&BinderUpdateEngineAndroidService::UnbindCallback),
69 base::Unretained(this),
70 base::Unretained(callback_binder.get())));
71
72 // Send an status update on connection (except when no update sent so far),
73 // since the status update is oneway and we don't need to wait for the
74 // response.
75 if (last_status_ != -1)
76 callback->onStatusUpdate(last_status_, last_progress_);
77
78 *return_value = true;
79 return Status::ok();
80 }
81
unbind(const android::sp<IUpdateEngineCallback> & callback,bool * return_value)82 Status BinderUpdateEngineAndroidService::unbind(
83 const android::sp<IUpdateEngineCallback>& callback, bool* return_value) {
84 const android::sp<IBinder>& callback_binder =
85 IUpdateEngineCallback::asBinder(callback);
86 auto binder_wrapper = android::BinderWrapper::Get();
87 binder_wrapper->UnregisterForDeathNotifications(callback_binder);
88
89 *return_value = UnbindCallback(callback_binder.get());
90 return Status::ok();
91 }
92
applyPayload(const android::String16 & url,int64_t payload_offset,int64_t payload_size,const std::vector<android::String16> & header_kv_pairs)93 Status BinderUpdateEngineAndroidService::applyPayload(
94 const android::String16& url,
95 int64_t payload_offset,
96 int64_t payload_size,
97 const std::vector<android::String16>& header_kv_pairs) {
98 const std::string payload_url{android::String8{url}.string()};
99 std::vector<std::string> str_headers;
100 str_headers.reserve(header_kv_pairs.size());
101 for (const auto& header : header_kv_pairs) {
102 str_headers.emplace_back(android::String8{header}.string());
103 }
104
105 brillo::ErrorPtr error;
106 if (!service_delegate_->ApplyPayload(
107 payload_url, payload_offset, payload_size, str_headers, &error)) {
108 return ErrorPtrToStatus(error);
109 }
110 return Status::ok();
111 }
112
suspend()113 Status BinderUpdateEngineAndroidService::suspend() {
114 brillo::ErrorPtr error;
115 if (!service_delegate_->SuspendUpdate(&error))
116 return ErrorPtrToStatus(error);
117 return Status::ok();
118 }
119
resume()120 Status BinderUpdateEngineAndroidService::resume() {
121 brillo::ErrorPtr error;
122 if (!service_delegate_->ResumeUpdate(&error))
123 return ErrorPtrToStatus(error);
124 return Status::ok();
125 }
126
cancel()127 Status BinderUpdateEngineAndroidService::cancel() {
128 brillo::ErrorPtr error;
129 if (!service_delegate_->CancelUpdate(&error))
130 return ErrorPtrToStatus(error);
131 return Status::ok();
132 }
133
resetStatus()134 Status BinderUpdateEngineAndroidService::resetStatus() {
135 brillo::ErrorPtr error;
136 if (!service_delegate_->ResetStatus(&error))
137 return ErrorPtrToStatus(error);
138 return Status::ok();
139 }
140
verifyPayloadApplicable(const android::String16 & metadata_filename,bool * return_value)141 Status BinderUpdateEngineAndroidService::verifyPayloadApplicable(
142 const android::String16& metadata_filename, bool* return_value) {
143 const std::string payload_metadata{
144 android::String8{metadata_filename}.string()};
145 LOG(INFO) << "Received a request of verifying payload metadata in "
146 << payload_metadata << ".";
147 brillo::ErrorPtr error;
148 *return_value =
149 service_delegate_->VerifyPayloadApplicable(payload_metadata, &error);
150 if (error != nullptr)
151 return ErrorPtrToStatus(error);
152 return Status::ok();
153 }
154
UnbindCallback(const IBinder * callback)155 bool BinderUpdateEngineAndroidService::UnbindCallback(const IBinder* callback) {
156 auto it = std::find_if(
157 callbacks_.begin(),
158 callbacks_.end(),
159 [&callback](const android::sp<IUpdateEngineCallback>& elem) {
160 return IUpdateEngineCallback::asBinder(elem).get() == callback;
161 });
162 if (it == callbacks_.end()) {
163 LOG(ERROR) << "Unable to unbind unknown callback.";
164 return false;
165 }
166 callbacks_.erase(it);
167 return true;
168 }
169
170 } // namespace chromeos_update_engine
171