74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "chre/util/pigweed/rpc_helper.h"
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#include <cinttypes>
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#include "chre/util/nanoapp/log.h"
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#ifndef LOG_TAG
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#define LOG_TAG "[RpcHelper]"
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#endif // LOG_TAG
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namespace chre {
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bool rpcEndpointsMatch(uint32_t expectedId, uint32_t actualId) {
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if ((expectedId & kRpcClientIdMask) != (actualId & kRpcClientIdMask)) {
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LOGE("Invalid endpoint 0x%04" PRIx32 " expected 0x%04" PRIx32, actualId,
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expectedId);
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return false;
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}
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return true;
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}
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bool isRpcChannelIdHost(uint32_t id) {
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return id >> 16 == 1;
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}
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bool isRpcChannelIdNanoapp(uint32_t id) {
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return id >> 16 == 0;
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}
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bool validateHostChannelId(const chreMessageFromHostData *msg,
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uint32_t channelId) {
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struct chreHostEndpointInfo info;
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if (!isRpcChannelIdHost(channelId) ||
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!chreGetHostEndpointInfo(msg->hostEndpoint, &info)) {
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LOGE("Invalid channelId for a host client 0x%08" PRIx32, channelId);
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return false;
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}
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return rpcEndpointsMatch(channelId, static_cast<uint32_t>(msg->hostEndpoint));
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}
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bool validateNanoappChannelId(uint32_t nappId, uint32_t channelId) {
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if (nappId > kRpcNanoappMaxId) {
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LOGE("Invalid nanoapp Id 0x%08" PRIx32, nappId);
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return false;
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}
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if (!isRpcChannelIdNanoapp(channelId)) {
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LOGE("Invalid channelId for a nanoapp 0x%08" PRIx32, channelId);
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return false;
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}
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return rpcEndpointsMatch(channelId, nappId);
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}
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} // namespace chre
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