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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "chre/platform/shared/host_protocol_common.h"
#include <string.h>
#include "chre/platform/shared/generated/host_messages_generated.h"
using flatbuffers::FlatBufferBuilder;
using flatbuffers::Offset;
using flatbuffers::Vector;
namespace chre {
void HostProtocolCommon::encodeNanoappMessage(
FlatBufferBuilder &builder, uint64_t appId, uint32_t messageType,
uint16_t hostEndpoint, const void *messageData, size_t messageDataLen) {
auto messageDataOffset = builder.CreateVector(
static_cast<const uint8_t *>(messageData), messageDataLen);
auto nanoappMessage = fbs::CreateNanoappMessage(
builder, appId, messageType, hostEndpoint, messageDataOffset);
finalize(builder, fbs::ChreMessage::NanoappMessage, nanoappMessage.Union());
}
Offset<Vector<int8_t>> HostProtocolCommon::addStringAsByteVector(
FlatBufferBuilder &builder, const char *str) {
return builder.CreateVector(reinterpret_cast<const int8_t *>(str),
strlen(str) + 1);
}
void HostProtocolCommon::finalize(FlatBufferBuilder &builder,
fbs::ChreMessage messageType,
flatbuffers::Offset<void> message,
uint16_t hostClientId) {
fbs::HostAddress hostAddr(hostClientId);
auto container =
fbs::CreateMessageContainer(builder, messageType, message, &hostAddr);
builder.Finish(container);
}
bool HostProtocolCommon::verifyMessage(const void *message, size_t messageLen) {
bool valid = false;
if (message != nullptr) {
flatbuffers::Verifier verifier(static_cast<const uint8_t *>(message),
messageLen);
valid = fbs::VerifyMessageContainerBuffer(verifier);
}
return valid;
}
} // namespace chre
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