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1 /*
2  * Copyright (C) 2016 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 <cstdarg>
18 #include <cstdio>
19 #include <cstring>
20 
21 #include "chre/core/event_loop_manager.h"
22 #include "chre/core/host_comms_manager.h"
23 #include "chre/platform/fatal_error.h"
24 #include "chre/platform/log.h"
25 #include "chre/util/macros.h"
26 #include "chre/util/system/napp_permissions.h"
27 #include "chre_api/chre/event.h"
28 #include "chre_api/chre/re.h"
29 
30 using chre::EventLoop;
31 using chre::EventLoopManager;
32 using chre::EventLoopManagerSingleton;
33 using chre::Nanoapp;
34 
chreAbort(uint32_t abortCode)35 DLL_EXPORT void chreAbort(uint32_t abortCode) {
36   Nanoapp *nanoapp = EventLoopManager::validateChreApiCall(__func__);
37 
38   // TODO: we should cleanly unload the nanoapp, release all of its resources,
39   // and send an abort notification to the host so as to localize the impact to
40   // the calling nanoapp
41   if (nanoapp == nullptr) {
42     FATAL_ERROR("chreAbort called in unknown context");
43   } else {
44     FATAL_ERROR("chreAbort called by app 0x%016" PRIx64, nanoapp->getAppId());
45   }
46 }
47 
chreSendEvent(uint16_t eventType,void * eventData,chreEventCompleteFunction * freeCallback,uint32_t targetInstanceId)48 DLL_EXPORT bool chreSendEvent(uint16_t eventType, void *eventData,
49                               chreEventCompleteFunction *freeCallback,
50                               uint32_t targetInstanceId) {
51   Nanoapp *nanoapp = EventLoopManager::validateChreApiCall(__func__);
52 
53   // Prevent an app that is in the process of being unloaded from generating new
54   // events
55   bool success = false;
56   EventLoop &eventLoop = EventLoopManagerSingleton::get()->getEventLoop();
57   if (eventLoop.currentNanoappIsStopping()) {
58     LOGW("Rejecting event from app instance %" PRIu32 " because it's stopping",
59          nanoapp->getInstanceId());
60   } else {
61     success = eventLoop.postLowPriorityEventOrFree(
62         eventType, eventData, freeCallback, nanoapp->getInstanceId(),
63         targetInstanceId);
64   }
65   return success;
66 }
67 
chreSendMessageToHost(void * message,uint32_t messageSize,uint32_t messageType,chreMessageFreeFunction * freeCallback)68 DLL_EXPORT bool chreSendMessageToHost(void *message, uint32_t messageSize,
69                                       uint32_t messageType,
70                                       chreMessageFreeFunction *freeCallback) {
71   return chreSendMessageToHostEndpoint(
72       message, static_cast<size_t>(messageSize), messageType,
73       CHRE_HOST_ENDPOINT_BROADCAST, freeCallback);
74 }
75 
chreSendMessageWithPermissions(void * message,size_t messageSize,uint32_t messageType,uint16_t hostEndpoint,uint32_t messagePermissions,chreMessageFreeFunction * freeCallback)76 DLL_EXPORT bool chreSendMessageWithPermissions(
77     void *message, size_t messageSize, uint32_t messageType,
78     uint16_t hostEndpoint, uint32_t messagePermissions,
79     chreMessageFreeFunction *freeCallback) {
80   Nanoapp *nanoapp = EventLoopManager::validateChreApiCall(__func__);
81 
82   bool success = false;
83   const EventLoop &eventLoop = EventLoopManagerSingleton::get()->getEventLoop();
84   if (eventLoop.currentNanoappIsStopping()) {
85     LOGW("Rejecting message to host from app instance %" PRIu32
86          " because it's stopping",
87          nanoapp->getInstanceId());
88   } else {
89     auto &hostCommsManager =
90         EventLoopManagerSingleton::get()->getHostCommsManager();
91     success = hostCommsManager.sendMessageToHostFromNanoapp(
92         nanoapp, message, messageSize, messageType, hostEndpoint,
93         messagePermissions, freeCallback);
94   }
95 
96   if (!success && freeCallback != nullptr) {
97     freeCallback(message, messageSize);
98   }
99 
100   return success;
101 }
102 
chreSendMessageToHostEndpoint(void * message,size_t messageSize,uint32_t messageType,uint16_t hostEndpoint,chreMessageFreeFunction * freeCallback)103 DLL_EXPORT bool chreSendMessageToHostEndpoint(
104     void *message, size_t messageSize, uint32_t messageType,
105     uint16_t hostEndpoint, chreMessageFreeFunction *freeCallback) {
106   return chreSendMessageWithPermissions(
107       message, messageSize, messageType, hostEndpoint,
108       static_cast<uint32_t>(chre::NanoappPermissions::CHRE_PERMS_NONE),
109       freeCallback);
110 }
111 
chreGetNanoappInfoByAppId(uint64_t appId,struct chreNanoappInfo * info)112 DLL_EXPORT bool chreGetNanoappInfoByAppId(uint64_t appId,
113                                           struct chreNanoappInfo *info) {
114   return EventLoopManagerSingleton::get()
115       ->getEventLoop()
116       .populateNanoappInfoForAppId(appId, info);
117 }
118 
chreGetNanoappInfoByInstanceId(uint32_t instanceId,struct chreNanoappInfo * info)119 DLL_EXPORT bool chreGetNanoappInfoByInstanceId(uint32_t instanceId,
120                                                struct chreNanoappInfo *info) {
121   return EventLoopManagerSingleton::get()
122       ->getEventLoop()
123       .populateNanoappInfoForInstanceId(instanceId, info);
124 }
125 
chreConfigureNanoappInfoEvents(bool enable)126 DLL_EXPORT void chreConfigureNanoappInfoEvents(bool enable) {
127   chre::Nanoapp *nanoapp = EventLoopManager::validateChreApiCall(__func__);
128   nanoapp->configureNanoappInfoEvents(enable);
129 }
130 
chreConfigureHostSleepStateEvents(bool enable)131 DLL_EXPORT void chreConfigureHostSleepStateEvents(bool enable) {
132   chre::Nanoapp *nanoapp = EventLoopManager::validateChreApiCall(__func__);
133   nanoapp->configureHostSleepEvents(enable);
134 }
135 
chreIsHostAwake()136 DLL_EXPORT bool chreIsHostAwake() {
137   return EventLoopManagerSingleton::get()
138       ->getEventLoop()
139       .getPowerControlManager()
140       .hostIsAwake();
141 }
142 
chreConfigureDebugDumpEvent(bool enable)143 DLL_EXPORT void chreConfigureDebugDumpEvent(bool enable) {
144   chre::Nanoapp *nanoapp = EventLoopManager::validateChreApiCall(__func__);
145   nanoapp->configureDebugDumpEvent(enable);
146 }
147