1 /*
2 * Copyright (C) 2022 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 "chre/util/pigweed/rpc_client.h"
18
19 #include <cinttypes>
20 #include <cstdint>
21
22 #include "chre/util/macros.h"
23 #include "chre/util/nanoapp/log.h"
24 #include "chre/util/pigweed/rpc_helper.h"
25 #include "chre_api/chre.h"
26
27 #ifndef LOG_TAG
28 #define LOG_TAG "[RpcClient]"
29 #endif // LOG_TAG
30
31 namespace chre {
32
handleEvent(uint32_t senderInstanceId,uint16_t eventType,const void * eventData)33 bool RpcClient::handleEvent(uint32_t senderInstanceId, uint16_t eventType,
34 const void *eventData) {
35 switch (eventType) {
36 case CHRE_EVENT_RPC_RESPONSE:
37 return handleMessageFromServer(senderInstanceId, eventData);
38 case CHRE_EVENT_NANOAPP_STOPPED:
39 handleNanoappStopped(eventData);
40 return true;
41 }
42
43 return true;
44 }
45
hasService(uint64_t id,uint32_t version)46 bool RpcClient::hasService(uint64_t id, uint32_t version) {
47 struct chreNanoappInfo info;
48 if (!chreGetNanoappInfoByAppId(mServerNanoappId, &info)) {
49 return false;
50 }
51
52 for (uint32_t i = 0; i < info.rpcServiceCount; i++) {
53 if (info.rpcServices[i].id == id) {
54 return info.rpcServices[i].version == version;
55 }
56 }
57
58 return false;
59 }
60
close()61 void RpcClient::close() {
62 chreConfigureNanoappInfoEvents(false);
63 }
64
handleMessageFromServer(uint32_t senderInstanceId,const void * eventData)65 bool RpcClient::handleMessageFromServer(uint32_t senderInstanceId,
66 const void *eventData) {
67 auto data = static_cast<const chre::ChrePigweedNanoappMessage *>(eventData);
68 pw::span packet(reinterpret_cast<const std::byte *>(data->msg),
69 data->msgSize);
70 struct chreNanoappInfo info;
71
72 if (!chreGetNanoappInfoByAppId(mServerNanoappId, &info) ||
73 info.instanceId > kRpcNanoappMaxId) {
74 return false;
75 }
76
77 if (!validateNanoappChannelId(senderInstanceId, info.instanceId)) {
78 return false;
79 }
80
81 pw::Status status = mRpcClient.ProcessPacket(packet);
82
83 if (status != pw::OkStatus()) {
84 LOGE("Failed to process the packet");
85 return false;
86 }
87
88 return true;
89 }
90
handleNanoappStopped(const void * eventData)91 void RpcClient::handleNanoappStopped(const void *eventData) {
92 auto info = static_cast<const struct chreNanoappInfo *>(eventData);
93
94 if (info->instanceId > kRpcNanoappMaxId) {
95 LOGE("Invalid nanoapp Id 0x%08" PRIx32, info->instanceId);
96 return;
97 }
98
99 if (info->instanceId == mChannelId) {
100 mRpcClient.CloseChannel(mChannelId);
101 mChannelId = 0;
102 }
103 }
104
105 } // namespace chre