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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_chre.h"
#include <inttypes.h>
#include <string.h>
#include "chre/platform/log.h"
#include "chre/platform/shared/generated/host_messages_generated.h"
using flatbuffers::FlatBufferBuilder;
using flatbuffers::Offset;
using flatbuffers::Vector;
namespace chre {
// This is similar to getStringFromByteVector in host_protocol_host.h. Ensure
// that method's implementation is kept in sync with this.
const char *getStringFromByteVector(const flatbuffers::Vector<int8_t> *vec) {
constexpr int8_t kNullChar = static_cast<int8_t>('\0');
const char *str = nullptr;
// Check that the vector is present, non-empty, and null-terminated
if (vec != nullptr && vec->size() > 0 &&
(*vec)[vec->size() - 1] == kNullChar) {
str = reinterpret_cast<const char *>(vec->Data());
}
return str;
}
bool HostProtocolChre::decodeMessageFromHost(const void *message,
size_t messageLen) {
bool success = verifyMessage(message, messageLen);
if (!success) {
LOGE("Dropping invalid/corrupted message from host (length %zu)",
messageLen);
} else {
const fbs::MessageContainer *container = fbs::GetMessageContainer(message);
uint16_t hostClientId = container->host_addr()->client_id();
switch (container->message_type()) {
case fbs::ChreMessage::NanoappMessage: {
const auto *nanoappMsg =
static_cast<const fbs::NanoappMessage *>(container->message());
// Required field; verifier ensures that this is not null (though it
// may be empty)
const flatbuffers::Vector<uint8_t> *msgData = nanoappMsg->message();
HostMessageHandlers::handleNanoappMessage(
nanoappMsg->app_id(), nanoappMsg->message_type(),
nanoappMsg->host_endpoint(), msgData->data(), msgData->size());
break;
}
case fbs::ChreMessage::HubInfoRequest:
HostMessageHandlers::handleHubInfoRequest(hostClientId);
break;
case fbs::ChreMessage::NanoappListRequest:
HostMessageHandlers::handleNanoappListRequest(hostClientId);
break;
case fbs::ChreMessage::LoadNanoappRequest: {
const auto *request =
static_cast<const fbs::LoadNanoappRequest *>(container->message());
const flatbuffers::Vector<uint8_t> *appBinary = request->app_binary();
const char *appBinaryFilename =
getStringFromByteVector(request->app_binary_file_name());
HostMessageHandlers::handleLoadNanoappRequest(
hostClientId, request->transaction_id(), request->app_id(),
request->app_version(), request->target_api_version(),
appBinary->data(), appBinary->size(), appBinaryFilename,
request->fragment_id(), request->total_app_size());
break;
}
case fbs::ChreMessage::UnloadNanoappRequest: {
const auto *request = static_cast<const fbs::UnloadNanoappRequest *>(
container->message());
HostMessageHandlers::handleUnloadNanoappRequest(
hostClientId, request->transaction_id(), request->app_id(),
request->allow_system_nanoapp_unload());
break;
}
case fbs::ChreMessage::TimeSyncMessage: {
const auto *request =
static_cast<const fbs::TimeSyncMessage *>(container->message());
HostMessageHandlers::handleTimeSyncMessage(request->offset());
break;
}
case fbs::ChreMessage::DebugDumpRequest:
HostMessageHandlers::handleDebugDumpRequest(hostClientId);
break;
case fbs::ChreMessage::SettingChangeMessage: {
const auto *settingMessage =
static_cast<const fbs::SettingChangeMessage *>(
container->message());
HostMessageHandlers::handleSettingChangeMessage(
settingMessage->setting(), settingMessage->state());
break;
}
default:
LOGW("Got invalid/unexpected message type %" PRIu8,
static_cast<uint8_t>(container->message_type()));
success = false;
}
}
return success;
}
void HostProtocolChre::encodeHubInfoResponse(
FlatBufferBuilder &builder, const char *name, const char *vendor,
const char *toolchain, uint32_t legacyPlatformVersion,
uint32_t legacyToolchainVersion, float peakMips, float stoppedPower,
float sleepPower, float peakPower, uint32_t maxMessageLen,
uint64_t platformId, uint32_t version, uint16_t hostClientId) {
auto nameOffset = addStringAsByteVector(builder, name);
auto vendorOffset = addStringAsByteVector(builder, vendor);
auto toolchainOffset = addStringAsByteVector(builder, toolchain);
auto response = fbs::CreateHubInfoResponse(
builder, nameOffset, vendorOffset, toolchainOffset, legacyPlatformVersion,
legacyToolchainVersion, peakMips, stoppedPower, sleepPower, peakPower,
maxMessageLen, platformId, version);
finalize(builder, fbs::ChreMessage::HubInfoResponse, response.Union(),
hostClientId);
}
void HostProtocolChre::addNanoappListEntry(
FlatBufferBuilder &builder,
DynamicVector<Offset<fbs::NanoappListEntry>> &offsetVector, uint64_t appId,
uint32_t appVersion, bool enabled, bool isSystemNanoapp) {
auto offset = fbs::CreateNanoappListEntry(builder, appId, appVersion, enabled,
isSystemNanoapp);
if (!offsetVector.push_back(offset)) {
LOGE("Couldn't push nanoapp list entry offset!");
}
}
void HostProtocolChre::finishNanoappListResponse(
FlatBufferBuilder &builder,
DynamicVector<Offset<fbs::NanoappListEntry>> &offsetVector,
uint16_t hostClientId) {
auto vectorOffset =
builder.CreateVector<Offset<fbs::NanoappListEntry>>(offsetVector);
auto response = fbs::CreateNanoappListResponse(builder, vectorOffset);
finalize(builder, fbs::ChreMessage::NanoappListResponse, response.Union(),
hostClientId);
}
void HostProtocolChre::encodeLoadNanoappResponse(
flatbuffers::FlatBufferBuilder &builder, uint16_t hostClientId,
uint32_t transactionId, bool success, uint32_t fragmentId) {
auto response = fbs::CreateLoadNanoappResponse(builder, transactionId,
success, fragmentId);
finalize(builder, fbs::ChreMessage::LoadNanoappResponse, response.Union(),
hostClientId);
}
void HostProtocolChre::encodeUnloadNanoappResponse(
flatbuffers::FlatBufferBuilder &builder, uint16_t hostClientId,
uint32_t transactionId, bool success) {
auto response =
fbs::CreateUnloadNanoappResponse(builder, transactionId, success);
finalize(builder, fbs::ChreMessage::UnloadNanoappResponse, response.Union(),
hostClientId);
}
void HostProtocolChre::encodeLogMessages(
flatbuffers::FlatBufferBuilder &builder, const char *logBuffer,
size_t bufferSize) {
auto logBufferOffset = builder.CreateVector(
reinterpret_cast<const int8_t *>(logBuffer), bufferSize);
auto message = fbs::CreateLogMessage(builder, logBufferOffset);
finalize(builder, fbs::ChreMessage::LogMessage, message.Union());
}
void HostProtocolChre::encodeDebugDumpData(
flatbuffers::FlatBufferBuilder &builder, uint16_t hostClientId,
const char *debugStr, size_t debugStrSize) {
auto debugStrOffset = builder.CreateVector(
reinterpret_cast<const int8_t *>(debugStr), debugStrSize);
auto message = fbs::CreateDebugDumpData(builder, debugStrOffset);
finalize(builder, fbs::ChreMessage::DebugDumpData, message.Union(),
hostClientId);
}
void HostProtocolChre::encodeDebugDumpResponse(
flatbuffers::FlatBufferBuilder &builder, uint16_t hostClientId,
bool success, uint32_t dataCount) {
auto response = fbs::CreateDebugDumpResponse(builder, success, dataCount);
finalize(builder, fbs::ChreMessage::DebugDumpResponse, response.Union(),
hostClientId);
}
void HostProtocolChre::encodeTimeSyncRequest(
flatbuffers::FlatBufferBuilder &builder) {
auto request = fbs::CreateTimeSyncRequest(builder);
finalize(builder, fbs::ChreMessage::TimeSyncRequest, request.Union());
}
void HostProtocolChre::encodeLowPowerMicAccessRequest(
flatbuffers::FlatBufferBuilder &builder) {
auto request = fbs::CreateLowPowerMicAccessRequest(builder);
finalize(builder, fbs::ChreMessage::LowPowerMicAccessRequest,
request.Union());
}
void HostProtocolChre::encodeLowPowerMicAccessRelease(
flatbuffers::FlatBufferBuilder &builder) {
auto request = fbs::CreateLowPowerMicAccessRelease(builder);
finalize(builder, fbs::ChreMessage::LowPowerMicAccessRelease,
request.Union());
}
} // namespace chre
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