bool LimitedNodeList::packetVersionAndHashMatch(const QByteArray& packet) {
PacketType checkType = packetTypeForPacket(packet);
int numPacketTypeBytes = numBytesArithmeticCodingFromBuffer(packet.data());
if (packet[numPacketTypeBytes] != versionForPacketType(checkType)
&& checkType != PacketTypeStunResponse) {
PacketType mismatchType = packetTypeForPacket(packet);
static QMultiMap<QUuid, PacketType> versionDebugSuppressMap;
QUuid senderUUID = uuidFromPacketHeader(packet);
if (!versionDebugSuppressMap.contains(senderUUID, checkType)) {
qCDebug(networking) << "Packet version mismatch on" << packetTypeForPacket(packet) << "- Sender"
<< uuidFromPacketHeader(packet) << "sent" << qPrintable(QString::number(packet[numPacketTypeBytes])) << "but"
<< qPrintable(QString::number(versionForPacketType(mismatchType))) << "expected.";
emit packetVersionMismatch();
versionDebugSuppressMap.insert(senderUUID, checkType);
}
return false;
}
if (!NON_VERIFIED_PACKETS.contains(checkType)) {
// figure out which node this is from
SharedNodePointer sendingNode = sendingNodeForPacket(packet);
if (sendingNode) {
// check if the md5 hash in the header matches the hash we would expect
if (hashFromPacketHeader(packet) == hashForPacketAndConnectionUUID(packet, sendingNode->getConnectionSecret())) {
return true;
} else {
static QMultiMap<QUuid, PacketType> hashDebugSuppressMap;
QUuid senderUUID = uuidFromPacketHeader(packet);
if (!hashDebugSuppressMap.contains(senderUUID, checkType)) {
qCDebug(networking) << "Packet hash mismatch on" << checkType << "- Sender"
<< uuidFromPacketHeader(packet);
hashDebugSuppressMap.insert(senderUUID, checkType);
}
}
} else {
static QString repeatedMessage
= LogHandler::getInstance().addRepeatedMessageRegex("Packet of type \\d+ received from unknown node with UUID");
qCDebug(networking) << "Packet of type" << checkType << "received from unknown node with UUID"
<< qPrintable(uuidStringWithoutCurlyBraces(uuidFromPacketHeader(packet)));
}
} else {
return true;
}
return false;
}
void OctreePacketProcessor::processPacket(const SharedNodePointer& sendingNode, const QByteArray& packet) {
PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings),
"OctreePacketProcessor::processPacket()");
QByteArray mutablePacket = packet;
const int WAY_BEHIND = 300;
if (packetsToProcessCount() > WAY_BEHIND && Application::getInstance()->getLogger()->extraDebugging()) {
qDebug("OctreePacketProcessor::processPacket() packets to process=%d", packetsToProcessCount());
}
int messageLength = mutablePacket.size();
Application* app = Application::getInstance();
bool wasStatsPacket = false;
PacketType voxelPacketType = packetTypeForPacket(mutablePacket);
// note: PacketType_OCTREE_STATS can have PacketType_VOXEL_DATA
// immediately following them inside the same packet. So, we process the PacketType_OCTREE_STATS first
// then process any remaining bytes as if it was another packet
if (voxelPacketType == PacketTypeOctreeStats) {
int statsMessageLength = app->parseOctreeStats(mutablePacket, sendingNode);
wasStatsPacket = true;
if (messageLength > statsMessageLength) {
mutablePacket = mutablePacket.mid(statsMessageLength);
// TODO: this does not look correct, the goal is to test the packet version for the piggyback, but
// this is testing the version and hash of the original packet
if (!DependencyManager::get<NodeList>()->packetVersionAndHashMatch(packet)) {
return; // bail since piggyback data doesn't match our versioning
}
} else {
// Note... stats packets don't have sequence numbers, so we don't want to send those to trackIncomingVoxelPacket()
return; // bail since no piggyback data
}
} // fall through to piggyback message
voxelPacketType = packetTypeForPacket(mutablePacket);
PacketVersion packetVersion = mutablePacket[1];
PacketVersion expectedVersion = versionForPacketType(voxelPacketType);
// check version of piggyback packet against expected version
if (packetVersion != expectedVersion) {
static QMultiMap<QUuid, PacketType> versionDebugSuppressMap;
QUuid senderUUID = uuidFromPacketHeader(packet);
if (!versionDebugSuppressMap.contains(senderUUID, voxelPacketType)) {
qDebug() << "Packet version mismatch on" << voxelPacketType << "- Sender"
<< senderUUID << "sent" << (int)packetVersion << "but"
<< (int)expectedVersion << "expected.";
emit packetVersionMismatch();
versionDebugSuppressMap.insert(senderUUID, voxelPacketType);
}
return; // bail since piggyback version doesn't match
}
app->trackIncomingOctreePacket(mutablePacket, sendingNode, wasStatsPacket);
if (sendingNode) {
switch(voxelPacketType) {
case PacketTypeEntityErase: {
if (DependencyManager::get<SceneScriptingInterface>()->shouldRenderEntities()) {
app->_entities.processEraseMessage(mutablePacket, sendingNode);
}
} break;
case PacketTypeEntityData: {
if (DependencyManager::get<SceneScriptingInterface>()->shouldRenderEntities()) {
app->_entities.processDatagram(mutablePacket, sendingNode);
}
} break;
case PacketTypeEnvironmentData: {
app->_environment.parseData(*sendingNode->getActiveSocket(), mutablePacket);
} break;
default: {
// nothing to do
} break;
}
}
}
void OctreePacketProcessor::processPacket(QSharedPointer<ReceivedMessage> message, SharedNodePointer sendingNode) {
PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings),
"OctreePacketProcessor::processPacket()");
const int WAY_BEHIND = 300;
if (packetsToProcessCount() > WAY_BEHIND && qApp->getLogger()->extraDebugging()) {
qDebug("OctreePacketProcessor::processPacket() packets to process=%d", packetsToProcessCount());
}
bool wasStatsPacket = false;
PacketType octreePacketType = message->getType();
// note: PacketType_OCTREE_STATS can have PacketType_VOXEL_DATA
// immediately following them inside the same packet. So, we process the PacketType_OCTREE_STATS first
// then process any remaining bytes as if it was another packet
if (octreePacketType == PacketType::OctreeStats) {
int statsMessageLength = qApp->processOctreeStats(*message, sendingNode);
wasStatsPacket = true;
int piggybackBytes = message->getSize() - statsMessageLength;
if (piggybackBytes) {
// construct a new packet from the piggybacked one
auto buffer = std::unique_ptr<char[]>(new char[piggybackBytes]);
memcpy(buffer.get(), message->getRawMessage() + statsMessageLength, piggybackBytes);
auto newPacket = NLPacket::fromReceivedPacket(std::move(buffer), piggybackBytes, message->getSenderSockAddr());
message = QSharedPointer<ReceivedMessage>::create(*newPacket);
} else {
// Note... stats packets don't have sequence numbers, so we don't want to send those to trackIncomingVoxelPacket()
return; // bail since no piggyback data
}
} // fall through to piggyback message
PacketType packetType = message->getType();
// check version of piggyback packet against expected version
if (message->getVersion() != versionForPacketType(message->getType())) {
static QMultiMap<QUuid, PacketType> versionDebugSuppressMap;
const QUuid& senderUUID = message->getSourceID();
if (!versionDebugSuppressMap.contains(senderUUID, packetType)) {
qDebug() << "Was stats packet? " << wasStatsPacket;
qDebug() << "OctreePacketProcessor - piggyback packet version mismatch on" << packetType << "- Sender"
<< senderUUID << "sent" << (int) message->getVersion() << "but"
<< (int) versionForPacketType(packetType) << "expected.";
emit packetVersionMismatch();
versionDebugSuppressMap.insert(senderUUID, packetType);
}
return; // bail since piggyback version doesn't match
}
qApp->trackIncomingOctreePacket(*message, sendingNode, wasStatsPacket);
// seek back to beginning of packet after tracking
message->seek(0);
switch(packetType) {
case PacketType::EntityErase: {
if (DependencyManager::get<SceneScriptingInterface>()->shouldRenderEntities()) {
qApp->getEntities()->processEraseMessage(*message, sendingNode);
}
} break;
case PacketType::EntityData: {
if (DependencyManager::get<SceneScriptingInterface>()->shouldRenderEntities()) {
qApp->getEntities()->processDatagram(*message, sendingNode);
}
} break;
default: {
// nothing to do
} break;
}
}
