void NodeList::pingPunchForDomainServer() {
// make sure if we're here that we actually still need to ping the domain-server
if (_domainHandler.getIP().isNull() && _domainHandler.getICEPeer().hasSockets()) {
// check if we've hit the number of pings we'll send to the DS before we consider it a fail
const int NUM_DOMAIN_SERVER_PINGS_BEFORE_RESET = 2000 / UDP_PUNCH_PING_INTERVAL_MS;
if (_domainHandler.getICEPeer().getConnectionAttempts() == 0) {
qCDebug(networking) << "Sending ping packets to establish connectivity with domain-server with ID"
<< uuidStringWithoutCurlyBraces(_domainHandler.getICEDomainID());
} else {
if (_domainHandler.getICEPeer().getConnectionAttempts() % NUM_DOMAIN_SERVER_PINGS_BEFORE_RESET == 0) {
// if we have then nullify the domain handler's network peer and send a fresh ICE heartbeat
qCDebug(networking) << "No ping replies received from domain-server with ID"
<< uuidStringWithoutCurlyBraces(_domainHandler.getICEClientID()) << "-" << "re-sending ICE query.";
_domainHandler.getICEPeer().softReset();
handleICEConnectionToDomainServer();
return;
}
}
flagTimeForConnectionStep(LimitedNodeList::ConnectionStep::SendPingsToDS);
// send the ping packet to the local and public sockets for this node
auto localPingPacket = constructICEPingPacket(PingType::Local, _sessionUUID);
sendPacket(std::move(localPingPacket), _domainHandler.getICEPeer().getLocalSocket());
auto publicPingPacket = constructICEPingPacket(PingType::Public, _sessionUUID);
sendPacket(std::move(publicPingPacket), _domainHandler.getICEPeer().getPublicSocket());
_domainHandler.getICEPeer().incrementConnectionAttempts();
}
}
void NodeList::sendDomainServerCheckIn() {
if (_publicSockAddr.isNull() && !_hasCompletedInitialSTUNFailure) {
// we don't know our public socket and we need to send it to the domain server
// send a STUN request to figure it out
sendSTUNRequest();
} else if (_domainHandler.getIP().isNull() && _domainHandler.requiresICE()) {
handleICEConnectionToDomainServer();
} else if (!_domainHandler.getIP().isNull()) {
bool isUsingDTLS = false;
PacketType domainPacketType = !_domainHandler.isConnected()
? PacketTypeDomainConnectRequest : PacketTypeDomainListRequest;
if (!_domainHandler.isConnected()) {
qDebug() << "Sending connect request to domain-server at" << _domainHandler.getHostname();
}
// construct the DS check in packet
QUuid packetUUID = _sessionUUID;
if (domainPacketType == PacketTypeDomainConnectRequest) {
if (!_domainHandler.getAssignmentUUID().isNull()) {
// this is a connect request and we're an assigned node
// so set our packetUUID as the assignment UUID
packetUUID = _domainHandler.getAssignmentUUID();
} else if (_domainHandler.requiresICE()) {
// this is a connect request and we're an interface client
// that used ice to discover the DS
// so send our ICE client UUID with the connect request
packetUUID = _domainHandler.getICEClientID();
}
}
QByteArray domainServerPacket = byteArrayWithPopulatedHeader(domainPacketType, packetUUID);
QDataStream packetStream(&domainServerPacket, QIODevice::Append);
// pack our data to send to the domain-server
packetStream << _ownerType << _publicSockAddr << _localSockAddr << _nodeTypesOfInterest.toList();
// if this is a connect request, and we can present a username signature, send it along
if (!_domainHandler.isConnected()) {
DataServerAccountInfo& accountInfo = AccountManager::getInstance().getAccountInfo();
packetStream << accountInfo.getUsername();
const QByteArray& usernameSignature = AccountManager::getInstance().getAccountInfo().getUsernameSignature();
if (!usernameSignature.isEmpty()) {
qDebug() << "Including username signature in domain connect request.";
packetStream << usernameSignature;
}
}
if (!isUsingDTLS) {
writeDatagram(domainServerPacket, _domainHandler.getSockAddr(), QUuid());
}
const int NUM_DOMAIN_SERVER_CHECKINS_PER_STUN_REQUEST = 5;
static unsigned int numDomainCheckins = 0;
// send a STUN request every Nth domain server check in so we update our public socket, if required
if (numDomainCheckins++ % NUM_DOMAIN_SERVER_CHECKINS_PER_STUN_REQUEST == 0) {
sendSTUNRequest();
}
if (_numNoReplyDomainCheckIns >= MAX_SILENT_DOMAIN_SERVER_CHECK_INS) {
// we haven't heard back from DS in MAX_SILENT_DOMAIN_SERVER_CHECK_INS
// so emit our signal that says that
emit limitOfSilentDomainCheckInsReached();
}
// increment the count of un-replied check-ins
_numNoReplyDomainCheckIns++;
}
}
void NodeList::sendDomainServerCheckIn() {
if (_isShuttingDown) {
qCDebug(networking) << "Refusing to send a domain-server check in while shutting down.";
return;
}
if (_publicSockAddr.isNull()) {
// we don't know our public socket and we need to send it to the domain server
qCDebug(networking) << "Waiting for inital public socket from STUN. Will not send domain-server check in.";
} else if (_domainHandler.getIP().isNull() && _domainHandler.requiresICE()) {
qCDebug(networking) << "Waiting for ICE discovered domain-server socket. Will not send domain-server check in.";
handleICEConnectionToDomainServer();
} else if (!_domainHandler.getIP().isNull()) {
bool isUsingDTLS = false;
PacketType domainPacketType = !_domainHandler.isConnected()
? PacketType::DomainConnectRequest : PacketType::DomainListRequest;
if (!_domainHandler.isConnected()) {
qCDebug(networking) << "Sending connect request to domain-server at" << _domainHandler.getHostname();
// is this our localhost domain-server?
// if so we need to make sure we have an up-to-date local port in case it restarted
if (_domainHandler.getSockAddr().getAddress() == QHostAddress::LocalHost
|| _domainHandler.getHostname() == "localhost") {
quint16 domainPort = DEFAULT_DOMAIN_SERVER_PORT;
getLocalServerPortFromSharedMemory(DOMAIN_SERVER_LOCAL_PORT_SMEM_KEY, domainPort);
qCDebug(networking) << "Local domain-server port read from shared memory (or default) is" << domainPort;
_domainHandler.setPort(domainPort);
}
}
// check if we're missing a keypair we need to verify ourselves with the domain-server
auto& accountManager = AccountManager::getInstance();
const QUuid& connectionToken = _domainHandler.getConnectionToken();
// we assume that we're on the same box as the DS if it has the same local address and
// it didn't present us with a connection token to use for username signature
bool localhostDomain = _domainHandler.getSockAddr().getAddress() == QHostAddress::LocalHost
|| (_domainHandler.getSockAddr().getAddress() == _localSockAddr.getAddress() && connectionToken.isNull());
bool requiresUsernameSignature = !_domainHandler.isConnected() && !connectionToken.isNull() && !localhostDomain;
if (requiresUsernameSignature && !accountManager.getAccountInfo().hasPrivateKey()) {
qWarning() << "A keypair is required to present a username signature to the domain-server"
<< "but no keypair is present. Waiting for keypair generation to complete.";
accountManager.generateNewUserKeypair();
// don't send the check in packet - wait for the keypair first
return;
}
auto domainPacket = NLPacket::create(domainPacketType);
QDataStream packetStream(domainPacket.get());
if (domainPacketType == PacketType::DomainConnectRequest) {
QUuid connectUUID;
if (!_domainHandler.getAssignmentUUID().isNull()) {
// this is a connect request and we're an assigned node
// so set our packetUUID as the assignment UUID
connectUUID = _domainHandler.getAssignmentUUID();
} else if (_domainHandler.requiresICE()) {
// this is a connect request and we're an interface client
// that used ice to discover the DS
// so send our ICE client UUID with the connect request
connectUUID = _domainHandler.getICEClientID();
}
// pack the connect UUID for this connect request
packetStream << connectUUID;
}
// pack our data to send to the domain-server
packetStream << _ownerType << _publicSockAddr << _localSockAddr << _nodeTypesOfInterest.toList();
if (!_domainHandler.isConnected()) {
DataServerAccountInfo& accountInfo = accountManager.getAccountInfo();
packetStream << accountInfo.getUsername();
// if this is a connect request, and we can present a username signature, send it along
if (requiresUsernameSignature && accountManager.getAccountInfo().hasPrivateKey()) {
const QByteArray& usernameSignature = accountManager.getAccountInfo().getUsernameSignature(connectionToken);
packetStream << usernameSignature;
}
}
flagTimeForConnectionStep(LimitedNodeList::ConnectionStep::SendDSCheckIn);
if (!isUsingDTLS) {
sendPacket(std::move(domainPacket), _domainHandler.getSockAddr());
}
if (_numNoReplyDomainCheckIns >= MAX_SILENT_DOMAIN_SERVER_CHECK_INS) {
// we haven't heard back from DS in MAX_SILENT_DOMAIN_SERVER_CHECK_INS
// so emit our signal that says that
emit limitOfSilentDomainCheckInsReached();
}
// increment the count of un-replied check-ins
_numNoReplyDomainCheckIns++;
}
}