1 /* 2 * Copyright (C) 2017 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/platform/shared/host_protocol_common.h" 18 19 #include <string.h> 20 21 #include "chre/platform/shared/host_messages_generated.h" 22 23 using flatbuffers::FlatBufferBuilder; 24 using flatbuffers::Offset; 25 using flatbuffers::Vector; 26 27 namespace chre { 28 29 void HostProtocolCommon::encodeNanoappMessage( 30 FlatBufferBuilder& builder, uint64_t appId, uint32_t messageType, 31 uint16_t hostEndpoint, const void *messageData, size_t messageDataLen) { 32 auto messageDataOffset = builder.CreateVector( 33 static_cast<const uint8_t *>(messageData), messageDataLen); 34 35 auto nanoappMessage = fbs::CreateNanoappMessage( 36 builder, appId, messageType, hostEndpoint, messageDataOffset); 37 finalize(builder, fbs::ChreMessage::NanoappMessage, nanoappMessage.Union()); 38 } 39 40 Offset<Vector<int8_t>> HostProtocolCommon::addStringAsByteVector( 41 FlatBufferBuilder& builder, const char *str) { 42 return builder.CreateVector(reinterpret_cast<const int8_t *>(str), 43 strlen(str) + 1); 44 } 45 46 void HostProtocolCommon::finalize( 47 FlatBufferBuilder& builder, fbs::ChreMessage messageType, 48 flatbuffers::Offset<void> message, uint16_t hostClientId) { 49 fbs::HostAddress hostAddr(hostClientId); 50 auto container = fbs::CreateMessageContainer( 51 builder, messageType, message, &hostAddr); 52 builder.Finish(container); 53 } 54 55 bool HostProtocolCommon::verifyMessage(const void *message, size_t messageLen) { 56 bool valid = false; 57 58 if (message != nullptr) { 59 flatbuffers::Verifier verifier(static_cast<const uint8_t *>(message), 60 messageLen); 61 62 valid = fbs::VerifyMessageContainerBuffer(verifier); 63 } 64 65 return valid; 66 } 67 68 69 } // namespace chre 70
