/// <exception cref="System.IO.IOException"></exception>
private void Negotiate(int port, ServerMessageBlock resp)
{
lock (Sbuf)
{
if (port == 139)
{
Ssn139();
}
else
{
if (port == -1)
{
port = SmbConstants.DefaultPort;
}
// 445
Socket = new SocketEx(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
if (LocalAddr != null)
{
Socket.Bind2(new IPEndPoint(LocalAddr, LocalPort));
}
Socket.Connect(new IPEndPoint(IPAddress.Parse(Address.GetHostAddress()), port), SmbConstants.ConnTimeout);
Socket.SoTimeOut = SmbConstants.SoTimeout;
Out = Socket.GetOutputStream();
In = Socket.GetInputStream();
}
if (++Mid == 32000)
{
Mid = 1;
}
NegotiateRequest.Mid = Mid;
int n = NegotiateRequest.Encode(Sbuf, 4);
Encdec.Enc_uint32be(n & 0xFFFF, Sbuf, 0);
if (Log.Level >= 4)
{
Log.WriteLine(NegotiateRequest);
if (Log.Level >= 6)
{
Hexdump.ToHexdump(Log, Sbuf, 4, n);
}
}
Out.Write(Sbuf, 0, 4 + n);
Out.Flush();
if (PeekKey() == null)
{
throw new IOException("transport closed in negotiate");
}
int size = Encdec.Dec_uint16be(Sbuf, 2) & 0xFFFF;
if (size < 33 || (4 + size) > Sbuf.Length)
{
throw new IOException("Invalid payload size: " + size);
}
Readn(In, Sbuf, 4 + 32, size - 32);
resp.Decode(Sbuf, 4);
if (Log.Level >= 4)
{
Log.WriteLine(resp);
if (Log.Level >= 6)
{
Hexdump.ToHexdump(Log, Sbuf, 4, n);
}
}
}
}
/// <exception cref="System.IO.IOException"></exception>
internal virtual void Ssn139()
{
Name calledName = new Name(Address.FirstCalledName(), 0x20, null
);
do
{
Socket = new SocketEx(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
if (LocalAddr != null)
{
Socket.Bind2(new IPEndPoint(LocalAddr, LocalPort));
}
Socket.Connect(new IPEndPoint(IPAddress.Parse(Address.GetHostAddress()), 139), SmbConstants.ConnTimeout);
Socket.SoTimeOut = SmbConstants.SoTimeout;
Out = Socket.GetOutputStream();
In = Socket.GetInputStream();
SessionServicePacket ssp = new SessionRequestPacket(calledName, NbtAddress.GetLocalName
());
Out.Write(Sbuf, 0, ssp.WriteWireFormat(Sbuf, 0));
if (Readn(In, Sbuf, 0, 4) < 4)
{
try
{
Socket.Dispose();
}
catch (IOException)
{
}
throw new SmbException("EOF during NetBIOS session request");
}
switch (Sbuf[0] & 0xFF)
{
case SessionServicePacket.PositiveSessionResponse:
{
if (Log.Level >= 4)
{
Log.WriteLine("session established ok with " + Address);
}
return;
}
case SessionServicePacket.NegativeSessionResponse:
{
int errorCode = In.Read() & 0xFF;
switch (errorCode)
{
case NbtException.CalledNotPresent:
case NbtException.NotListeningCalled:
{
Socket.Dispose();
break;
}
default:
{
Disconnect(true);
throw new NbtException(NbtException.ErrSsnSrvc, errorCode);
}
}
break;
}
case -1:
{
Disconnect(true);
throw new NbtException(NbtException.ErrSsnSrvc, NbtException.ConnectionRefused
);
}
default:
{
Disconnect(true);
throw new NbtException(NbtException.ErrSsnSrvc, 0);
}
}
}
while ((calledName.name = Address.NextCalledName()) != null);
throw new IOException("Failed to establish session with " + Address);
}