public override int Read(byte[] buffer, int offset, int count)
{
int res = _ist.Read(buffer, offset, count);
if (res != -1)
{
_position += res;
return(res);
}
return(0);
}
/// <exception cref="System.IO.IOException"></exception>
internal override int ReadTrailerWireFormat(InputStream @in, byte[] buffer, int bufferIndex
)
{
int start = bufferIndex;
if (@in.Read(buffer, bufferIndex, Length) != Length)
{
throw new IOException("invalid session request wire format");
}
bufferIndex += _calledName.ReadWireFormat(buffer, bufferIndex);
bufferIndex += _callingName.ReadWireFormat(buffer, bufferIndex);
return bufferIndex - start;
}
/// <exception cref="System.IO.IOException"></exception>
internal override int ReadTrailerWireFormat(InputStream @in, byte[] buffer, int bufferIndex
)
{
if (@in.Read(buffer, bufferIndex, Length) != Length)
{
throw new IOException("unexpected EOF reading netbios retarget session response");
}
int addr = ReadInt4(buffer, bufferIndex);
bufferIndex += 4;
_retargetAddress = new NbtAddress(null, addr, false, NbtAddress.BNode);
_retargetPort = ReadInt2(buffer, bufferIndex);
return Length;
}
/// <exception cref="System.IO.IOException"></exception>
internal static int Readn(InputStream @in, byte[] b, int off, int len)
{
int i = 0;
int n;
while (i < len)
{
n = @in.Read(b, off + i, len - i);
if (n <= 0)
{
break;
}
i += n;
}
return i;
}
/// <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);
}