private void ProcessPacket(SessionPacket packet, ConnectionState state)
{
if (packet is SessionKeepAlivePacket && m_transport == SMBTransportType.NetBiosOverTCP)
{
// [RFC 1001] NetBIOS session keep alives do not require a response from the NetBIOS peer
}
else if (packet is PositiveSessionResponsePacket && m_transport == SMBTransportType.NetBiosOverTCP)
{
}
else if (packet is NegativeSessionResponsePacket && m_transport == SMBTransportType.NetBiosOverTCP)
{
m_clientSocket.Dispose();
m_isConnected = false;
}
else if (packet is SessionMessagePacket)
{
SMB2Command command;
try
{
command = SMB2Command.ReadResponse(packet.Trailer, 0);
}
catch (Exception ex)
{
Log("Invalid SMB2 response: " + ex.Message);
m_clientSocket.Dispose();
m_isConnected = false;
return;
}
// [MS-SMB2] 3.2.5.1.2 - If the MessageId is 0xFFFFFFFFFFFFFFFF, this is not a reply to a previous request,
// and the client MUST NOT attempt to locate the request, but instead process it as follows:
// If the command field in the SMB2 header is SMB2 OPLOCK_BREAK, it MUST be processed as specified in 3.2.5.19.
// Otherwise, the response MUST be discarded as invalid.
if (command.Header.MessageID != 0xFFFFFFFFFFFFFFFF || command.Header.Command == SMB2CommandName.OplockBreak)
{
lock (m_incomingQueueLock)
{
m_credits += command.Header.Credits;
Log("[ProcessPacket] CreditsResponse:" + m_credits);
m_incomingQueue.Add(command);
m_incomingQueueEventHandle.Set();
}
}
}
}
private void ProcessPacket(SessionPacket packet, ConnectionState state)
{
if (packet is SessionMessagePacket)
{
SMB2Command command;
try
{
command = SMB2Command.ReadResponse(packet.Trailer, 0);
}
catch (Exception ex)
{
Log("Invalid SMB2 response: " + ex.Message);
state.ClientSocket.Close();
m_isConnected = false;
return;
}
m_availableCredits += command.Header.Credits;
if (m_transport == SMBTransportType.DirectTCPTransport && command is NegotiateResponse)
{
NegotiateResponse negotiateResponse = (NegotiateResponse)command;
if ((negotiateResponse.Capabilities & Capabilities.LargeMTU) > 0)
{
// [MS-SMB2] 3.2.5.1 Receiving Any Message - If the message size received exceeds Connection.MaxTransactSize, the client MUST disconnect the connection.
// Note: Windows clients do not enforce the MaxTransactSize value, we add 256 bytes.
int maxPacketSize = SessionPacket.HeaderLength + (int)Math.Min(negotiateResponse.MaxTransactSize, ClientMaxTransactSize) + 256;
if (maxPacketSize > state.ReceiveBuffer.Buffer.Length)
{
state.ReceiveBuffer.IncreaseBufferSize(maxPacketSize);
}
}
}
// [MS-SMB2] 3.2.5.1.2 - If the MessageId is 0xFFFFFFFFFFFFFFFF, this is not a reply to a previous request,
// and the client MUST NOT attempt to locate the request, but instead process it as follows:
// If the command field in the SMB2 header is SMB2 OPLOCK_BREAK, it MUST be processed as specified in 3.2.5.19.
// Otherwise, the response MUST be discarded as invalid.
if (command.Header.MessageID != 0xFFFFFFFFFFFFFFFF || command.Header.Command == SMB2CommandName.OplockBreak)
{
lock (m_incomingQueueLock)
{
m_incomingQueue.Add(command);
m_incomingQueueEventHandle.Set();
}
}
}
else if ((packet is PositiveSessionResponsePacket || packet is NegativeSessionResponsePacket) && m_transport == SMBTransportType.NetBiosOverTCP)
{
m_sessionResponsePacket = packet;
m_sessionResponseEventHandle.Set();
}
else if (packet is SessionKeepAlivePacket && m_transport == SMBTransportType.NetBiosOverTCP)
{
// [RFC 1001] NetBIOS session keep alives do not require a response from the NetBIOS peer
}
else
{
Log("Inappropriate NetBIOS session packet");
state.ClientSocket.Close();
}
}
