QByteArray NLPacket::hashForPacketAndSecret(const udt::Packet& packet, const QUuid& connectionSecret) {
QCryptographicHash hash(QCryptographicHash::Md5);
int offset = Packet::totalHeaderSize(packet.isPartOfMessage()) + sizeof(PacketType) + sizeof(PacketVersion)
+ NUM_BYTES_RFC4122_UUID + NUM_BYTES_MD5_HASH;
// add the packet payload and the connection UUID
hash.addData(packet.getData() + offset, packet.getDataSize() - offset);
hash.addData(connectionSecret.toRfc4122());
// return the hash
return hash.result();
}
bool IceServer::packetVersionMatch(const udt::Packet& packet) {
PacketType headerType = NLPacket::typeInHeader(packet);
PacketVersion headerVersion = NLPacket::versionInHeader(packet);
if (headerVersion == versionForPacketType(headerType)) {
return true;
} else {
qDebug() << "Packet version mismatch for packet" << headerType << " from" << packet.getSenderSockAddr();
return false;
}
}
bool LimitedNodeList::packetVersionMatch(const udt::Packet& packet) {
PacketType headerType = NLPacket::typeInHeader(packet);
PacketVersion headerVersion = NLPacket::versionInHeader(packet);
if (headerVersion != versionForPacketType(headerType)) {
static QMultiHash<QUuid, PacketType> sourcedVersionDebugSuppressMap;
static QMultiHash<HifiSockAddr, PacketType> versionDebugSuppressMap;
bool hasBeenOutput = false;
QString senderString;
if (NON_SOURCED_PACKETS.contains(headerType)) {
const HifiSockAddr& senderSockAddr = packet.getSenderSockAddr();
hasBeenOutput = versionDebugSuppressMap.contains(senderSockAddr, headerType);
if (!hasBeenOutput) {
versionDebugSuppressMap.insert(senderSockAddr, headerType);
senderString = QString("%1:%2").arg(senderSockAddr.getAddress().toString()).arg(senderSockAddr.getPort());
}
} else {
QUuid sourceID = NLPacket::sourceIDInHeader(packet);
hasBeenOutput = sourcedVersionDebugSuppressMap.contains(sourceID, headerType);
if (!hasBeenOutput) {
sourcedVersionDebugSuppressMap.insert(sourceID, headerType);
senderString = uuidStringWithoutCurlyBraces(sourceID.toString());
}
}
if (!hasBeenOutput) {
qCDebug(networking) << "Packet version mismatch on" << headerType << "- Sender"
<< senderString << "sent" << qPrintable(QString::number(headerVersion)) << "but"
<< qPrintable(QString::number(versionForPacketType(headerType))) << "expected.";
emit packetVersionMismatch(headerType);
}
return false;
} else {
return true;
}
}
QByteArray NLPacket::verificationHashInHeader(const udt::Packet& packet) {
int offset = Packet::totalHeaderSize(packet.isPartOfMessage()) + sizeof(PacketType) + sizeof(PacketVersion) + NUM_BYTES_RFC4122_UUID;
return QByteArray(packet.getData() + offset, NUM_BYTES_MD5_HASH);
}
QUuid NLPacket::sourceIDInHeader(const udt::Packet& packet) {
int offset = Packet::totalHeaderSize(packet.isPartOfMessage()) + sizeof(PacketType) + sizeof(PacketVersion);
return QUuid::fromRfc4122(QByteArray::fromRawData(packet.getData() + offset, NUM_BYTES_RFC4122_UUID));
}
PacketVersion NLPacket::versionInHeader(const udt::Packet& packet) {
auto headerOffset = Packet::totalHeaderSize(packet.isPartOfMessage());
return *reinterpret_cast<const PacketVersion*>(packet.getData() + headerOffset + sizeof(PacketType));
}
PacketType NLPacket::typeInHeader(const udt::Packet& packet) {
auto headerOffset = Packet::totalHeaderSize(packet.isPartOfMessage());
return *reinterpret_cast<const PacketType*>(packet.getData() + headerOffset);
}