void NetInterface::handleConnectAccept(const Address &address, BitStream *stream)
{
Nonce nonce, serverNonce;
nonce.read(stream);
serverNonce.read(stream);
U32 decryptPos = stream->getBytePosition();
stream->setBytePosition(decryptPos);
// Make sure we're actually waiting for a connection. If not, then there's something wrong, and we bail.
NetConnection *conn = findPendingConnection(address);
if(!conn || conn->getConnectionState() != NetConnection::AwaitingConnectResponse)
return;
ConnectionParameters &theParams = conn->getConnectionParameters();
if(theParams.mNonce != nonce || theParams.mServerNonce != serverNonce)
return;
if(theParams.mUsingCrypto)
{
SymmetricCipher theCipher(theParams.mSharedSecret);
if(!stream->decryptAndCheckHash(NetConnection::MessageSignatureBytes, decryptPos, &theCipher))
return;
}
U32 recvSequence;
stream->read(&recvSequence);
conn->setInitialRecvSequence(recvSequence);
NetConnection::TerminationReason reason;
if(!conn->readConnectAccept(stream, reason))
{
removePendingConnection(conn);
return;
}
if(theParams.mUsingCrypto)
{
stream->read(SymmetricCipher::KeySize, theParams.mInitVector);
conn->setSymmetricCipher(new SymmetricCipher(theParams.mSymmetricKey, theParams.mInitVector));
}
addConnection(conn); // First, add it as a regular connection,
removePendingConnection(conn); // then remove it from the pending connection list
conn->setConnectionState(NetConnection::Connected);
conn->onConnectionEstablished(); // notify the connection that it has been established
logprintf(LogConsumer::LogNetInterface, "Received Connect Accept - connection established.");
}
void NetInterface::handleConnectAccept(const Address &address, BitStream *stream)
{
Nonce nonce, serverNonce;
nonce.read(stream);
serverNonce.read(stream);
U32 decryptPos = stream->getBytePosition();
stream->setBytePosition(decryptPos);
NetConnection *conn = findPendingConnection(address);
if(!conn || conn->getConnectionState() != NetConnection::AwaitingConnectResponse)
return;
ConnectionParameters &theParams = conn->getConnectionParameters();
if(theParams.mNonce != nonce || theParams.mServerNonce != serverNonce)
return;
if(theParams.mUsingCrypto)
{
SymmetricCipher theCipher(theParams.mSharedSecret);
if(!stream->decryptAndCheckHash(NetConnection::MessageSignatureBytes, decryptPos, &theCipher))
return;
}
U32 recvSequence;
stream->read(&recvSequence);
conn->setInitialRecvSequence(recvSequence);
const char *errorString = NULL;
if(!conn->readConnectAccept(stream, &errorString))
{
removePendingConnection(conn);
return;
}
if(theParams.mUsingCrypto)
{
stream->read(SymmetricCipher::KeySize, theParams.mInitVector);
conn->setSymmetricCipher(new SymmetricCipher(theParams.mSymmetricKey, theParams.mInitVector));
}
addConnection(conn); // first, add it as a regular connection
removePendingConnection(conn); // remove from the pending connection list
conn->setConnectionState(NetConnection::Connected);
conn->onConnectionEstablished(); // notify the connection that it has been established
TNLLogMessageV(LogNetInterface, ("Received Connect Accept - connection established."));
}
void NetInterface::handleConnectRequest(const Address &address, BitStream *stream)
{
if(!mAllowConnections)
return;
ConnectionParameters theParams;
theParams.mNonce.read(stream);
theParams.mServerNonce.read(stream);
stream->read(&theParams.mClientIdentity);
if(theParams.mClientIdentity != computeClientIdentityToken(address, theParams.mNonce))
return;
stream->read(&theParams.mPuzzleDifficulty);
stream->read(&theParams.mPuzzleSolution);
// see if the connection is in the main connection table.
// If the connection is in the connection table and it has
// the same initiatorSequence, we'll just resend the connect
// acceptance packet, assuming that the last time we sent it
// it was dropped.
NetConnection *connect = findConnection(address);
if(connect)
{
ConnectionParameters &cp = connect->getConnectionParameters();
if(cp.mNonce == theParams.mNonce && cp.mServerNonce == theParams.mServerNonce)
{
sendConnectAccept(connect);
return;
}
}
// check the puzzle solution
ClientPuzzleManager::ErrorCode result = mPuzzleManager.checkSolution(
theParams.mPuzzleSolution, theParams.mNonce, theParams.mServerNonce,
theParams.mPuzzleDifficulty, theParams.mClientIdentity);
if(result != ClientPuzzleManager::Success)
{
sendConnectReject(&theParams, address, "Puzzle");
return;
}
if(stream->readFlag())
{
if(mPrivateKey.isNull())
return;
theParams.mUsingCrypto = true;
theParams.mPublicKey = new AsymmetricKey(stream);
theParams.mPrivateKey = mPrivateKey;
U32 decryptPos = stream->getBytePosition();
stream->setBytePosition(decryptPos);
theParams.mSharedSecret = theParams.mPrivateKey->computeSharedSecretKey(theParams.mPublicKey);
//logprintf("shared secret (server) %s", theParams.mSharedSecret->encodeBase64()->getBuffer());
SymmetricCipher theCipher(theParams.mSharedSecret);
if(!stream->decryptAndCheckHash(NetConnection::MessageSignatureBytes, decryptPos, &theCipher))
return;
// now read the first part of the connection's symmetric key
stream->read(SymmetricCipher::KeySize, theParams.mSymmetricKey);
Random::read(theParams.mInitVector, SymmetricCipher::KeySize);
}
U32 connectSequence;
theParams.mDebugObjectSizes = stream->readFlag();
stream->read(&connectSequence);
TNLLogMessageV(LogNetInterface, ("Received Connect Request %8x", theParams.mClientIdentity));
if(connect)
disconnect(connect, NetConnection::ReasonSelfDisconnect, "NewConnection");
char connectionClass[256];
stream->readString(connectionClass);
NetConnection *conn = NetConnectionRep::create(connectionClass);
if(!conn)
return;
RefPtr<NetConnection> theConnection = conn;
conn->getConnectionParameters() = theParams;
conn->setNetAddress(address);
conn->setInitialRecvSequence(connectSequence);
conn->setInterface(this);
if(theParams.mUsingCrypto)
conn->setSymmetricCipher(new SymmetricCipher(theParams.mSymmetricKey, theParams.mInitVector));
const char *errorString = NULL;
if(!conn->readConnectRequest(stream, &errorString))
{
sendConnectReject(&theParams, address, errorString);
return;
}
addConnection(conn);
conn->setConnectionState(NetConnection::Connected);
conn->onConnectionEstablished();
sendConnectAccept(conn);
}
void NetInterface::handleArrangedConnectRequest(const Address &theAddress, BitStream *stream)
{
S32 i, j;
NetConnection *conn;
Nonce nonce, serverNonce;
nonce.read(stream);
// see if the connection is in the main connection table.
// If the connection is in the connection table and it has
// the same initiatorSequence, we'll just resend the connect
// acceptance packet, assuming that the last time we sent it
// it was dropped.
NetConnection *oldConnection = findConnection(theAddress);
if(oldConnection)
{
ConnectionParameters &cp = oldConnection->getConnectionParameters();
if(cp.mNonce == nonce)
{
sendConnectAccept(oldConnection);
return;
}
}
for(i = 0; i < mPendingConnections.size(); i++)
{
conn = mPendingConnections[i];
ConnectionParameters &theParams = conn->getConnectionParameters();
if(conn->getConnectionState() != NetConnection::SendingPunchPackets || theParams.mIsInitiator)
continue;
if(nonce != theParams.mNonce)
continue;
for(j = 0; j < theParams.mPossibleAddresses.size(); j++)
if(theAddress.isEqualAddress(theParams.mPossibleAddresses[j]))
break;
if(j != theParams.mPossibleAddresses.size())
break;
}
if(i == mPendingConnections.size())
return;
ConnectionParameters &theParams = conn->getConnectionParameters();
SymmetricCipher theCipher(theParams.mArrangedSecret);
if(!stream->decryptAndCheckHash(NetConnection::MessageSignatureBytes, stream->getBytePosition(), &theCipher))
return;
stream->setBytePosition(stream->getBytePosition());
serverNonce.read(stream);
if(serverNonce != theParams.mServerNonce)
return;
if(stream->readFlag())
{
if(mPrivateKey.isNull())
return;
theParams.mUsingCrypto = true;
theParams.mPublicKey = new AsymmetricKey(stream);
theParams.mPrivateKey = mPrivateKey;
U32 decryptPos = stream->getBytePosition();
stream->setBytePosition(decryptPos);
theParams.mSharedSecret = theParams.mPrivateKey->computeSharedSecretKey(theParams.mPublicKey);
SymmetricCipher theCipher(theParams.mSharedSecret);
if(!stream->decryptAndCheckHash(NetConnection::MessageSignatureBytes, decryptPos, &theCipher))
return;
// now read the first part of the connection's session (symmetric) key
stream->read(SymmetricCipher::KeySize, theParams.mSymmetricKey);
Random::read(theParams.mInitVector, SymmetricCipher::KeySize);
}
U32 connectSequence;
theParams.mDebugObjectSizes = stream->readFlag();
stream->read(&connectSequence);
TNLLogMessageV(LogNetInterface, ("Received Arranged Connect Request"));
if(oldConnection)
disconnect(oldConnection, NetConnection::ReasonSelfDisconnect, "");
conn->setNetAddress(theAddress);
conn->setInitialRecvSequence(connectSequence);
if(theParams.mUsingCrypto)
conn->setSymmetricCipher(new SymmetricCipher(theParams.mSymmetricKey, theParams.mInitVector));
const char *errorString = NULL;
if(!conn->readConnectRequest(stream, &errorString))
{
sendConnectReject(&theParams, theAddress, errorString);
removePendingConnection(conn);
return;
}
addConnection(conn);
removePendingConnection(conn);
conn->setConnectionState(NetConnection::Connected);
conn->onConnectionEstablished();
sendConnectAccept(conn);
}
