/// <exception cref="WinrtCifs.Dcerpc.DcerpcException"></exception>
/// <exception cref="System.IO.IOException"></exception>
public virtual void Sendrecv(DcerpcMessage msg)
{
byte[] stub;
byte[] frag;
NdrBuffer buf;
NdrBuffer fbuf;
bool isDirect;
DcerpcException de;
if (State == 0)
{
Bind();
}
isDirect = true;
stub = BufferCache.GetBuffer();
try
{
int off;
int tot;
int n;
buf = new NdrBuffer(stub, 0);
msg.Flags = DcerpcConstants.DcerpcFirstFrag | DcerpcConstants.DcerpcLastFrag;
msg.CallId = _callId++;
msg.Encode(buf);
if (SecurityProvider != null)
{
buf.SetIndex(0);
SecurityProvider.Wrap(buf);
}
tot = buf.GetLength() - 24;
off = 0;
while (off < tot)
{
n = tot - off;
if ((24 + n) > MaxXmit)
{
msg.Flags &= ~DcerpcConstants.DcerpcLastFrag;
n = MaxXmit - 24;
}
else
{
msg.Flags |= DcerpcConstants.DcerpcLastFrag;
isDirect = false;
msg.AllocHint = n;
}
msg.Length = 24 + n;
if (off > 0)
{
msg.Flags &= ~DcerpcConstants.DcerpcFirstFrag;
}
if ((msg.Flags & (DcerpcConstants.DcerpcFirstFrag | DcerpcConstants.DcerpcLastFrag)) != (DcerpcConstants.DcerpcFirstFrag |
DcerpcConstants.DcerpcLastFrag))
{
buf.Start = off;
buf.Reset();
msg.Encode_header(buf);
buf.Enc_ndr_long(msg.AllocHint);
buf.Enc_ndr_short(0);
buf.Enc_ndr_short(msg.GetOpnum());
}
DoSendFragment(stub, off, msg.Length, isDirect);
off += n;
}
DoReceiveFragment(stub, isDirect);
buf.Reset();
buf.SetIndex(8);
buf.SetLength(buf.Dec_ndr_short());
if (SecurityProvider != null)
{
SecurityProvider.Unwrap(buf);
}
buf.SetIndex(0);
msg.Decode_header(buf);
off = 24;
if (msg.Ptype == 2 && msg.IsFlagSet(DcerpcConstants.DcerpcLastFrag) == false)
{
off = msg.Length;
}
frag = null;
fbuf = null;
while (msg.IsFlagSet(DcerpcConstants.DcerpcLastFrag) == false)
{
int stubFragLen;
if (frag == null)
{
frag = new byte[MaxRecv];
fbuf = new NdrBuffer(frag, 0);
}
DoReceiveFragment(frag, isDirect);
fbuf.Reset();
fbuf.SetIndex(8);
fbuf.SetLength(fbuf.Dec_ndr_short());
if (SecurityProvider != null)
{
SecurityProvider.Unwrap(fbuf);
}
fbuf.Reset();
msg.Decode_header(fbuf);
stubFragLen = msg.Length - 24;
if ((off + stubFragLen) > stub.Length)
{
// shouldn't happen if alloc_hint is correct or greater
byte[] tmp = new byte[off + stubFragLen];
Array.Copy(stub, 0, tmp, 0, off);
stub = tmp;
}
Array.Copy(frag, 24, stub, off, stubFragLen);
off += stubFragLen;
}
buf = new NdrBuffer(stub, 0);
msg.Decode(buf);
}
finally
{
BufferCache.ReleaseBuffer(stub);
}
if ((de = msg.GetResult()) != null)
{
throw de;
}
}