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); }