private int StartReading(byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
{
int num = 0;
Label_0002:
if (asyncRequest != null)
{
asyncRequest.SetNextRequest(buffer, offset, count, _ResumeAsyncReadCallback);
}
int userResult = this._SslState.CheckEnqueueRead(buffer, offset, count, asyncRequest);
switch (userResult)
{
case 0:
return 0;
case -1:
num = this.StartFrameHeader(buffer, offset, count, asyncRequest);
if (num == -1)
{
goto Label_0002;
}
return num;
}
if (asyncRequest != null)
{
asyncRequest.CompleteUser(userResult);
}
return userResult;
}
private void StartWriting(byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
{
if (asyncRequest != null)
{
asyncRequest.SetNextRequest(buffer, offset, count, _ResumeAsyncWriteCallback);
}
if (count >= 0)
{
byte[] outBuffer = null;
do
{
int num2;
if (this._SslState.CheckEnqueueWrite(asyncRequest))
{
return;
}
int num = Math.Min(count, this._SslState.MaxDataSize);
SecurityStatus errorCode = this._SslState.EncryptData(buffer, offset, num, ref outBuffer, out num2);
if (errorCode != SecurityStatus.OK)
{
ProtocolToken token = new ProtocolToken(null, errorCode);
throw new IOException(SR.GetString("net_io_encrypt"), token.GetException());
}
if (asyncRequest != null)
{
asyncRequest.SetNextRequest(buffer, offset + num, count - num, _ResumeAsyncWriteCallback);
IAsyncResult asyncResult = this._SslState.InnerStream.BeginWrite(outBuffer, 0, num2, _WriteCallback, asyncRequest);
if (!asyncResult.CompletedSynchronously)
{
return;
}
this._SslState.InnerStream.EndWrite(asyncResult);
}
else
{
this._SslState.InnerStream.Write(outBuffer, 0, num2);
}
offset += num;
count -= num;
this._SslState.FinishWrite();
}
while (count != 0);
}
if (asyncRequest != null)
{
asyncRequest.CompleteUser();
}
}
private int StartFrameBody(int readBytes, byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
{
if (readBytes == 0)
{
this.DecrementInternalBufferCount(this.InternalBufferCount);
if (asyncRequest != null)
{
asyncRequest.CompleteUser(0);
}
return 0;
}
readBytes = this._SslState.GetRemainingFrameSize(this.InternalBuffer, readBytes);
if (readBytes < 0)
{
throw new IOException(SR.GetString("net_frame_read_size"));
}
this.EnsureInternalBufferSize(this._SslState.HeaderSize, readBytes);
if (asyncRequest != null)
{
asyncRequest.SetNextRequest(this.InternalBuffer, this._SslState.HeaderSize, readBytes, _ReadFrameCallback);
this._Reader.AsyncReadPacket(asyncRequest);
if (!asyncRequest.MustCompleteSynchronously)
{
return 0;
}
readBytes = asyncRequest.Result;
}
else
{
readBytes = this._Reader.ReadPacket(this.InternalBuffer, this._SslState.HeaderSize, readBytes);
}
return this.ProcessFrameBody(readBytes, buffer, offset, count, asyncRequest);
}
private int ProcessReadErrorCode(SecurityStatus errorCode, byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest, byte[] extraBuffer)
{
ProtocolToken token = new ProtocolToken(null, errorCode);
if (token.Renegotiate)
{
this._SslState.ReplyOnReAuthentication(extraBuffer);
return -1;
}
if (!token.CloseConnection)
{
throw new IOException(SR.GetString("net_io_decrypt"), token.GetException());
}
this._SslState.FinishRead(null);
if (asyncRequest != null)
{
asyncRequest.CompleteUser(0);
}
return 0;
}
private int ProcessRead(byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
{
int num2;
this.ValidateParameters(buffer, offset, count);
if (Interlocked.Exchange(ref this._NestedRead, 1) == 1)
{
throw new NotSupportedException(SR.GetString("net_io_invalidnestedcall", new object[] { (asyncRequest != null) ? "BeginRead" : "Read", "read" }));
}
bool flag = false;
try
{
if (this.InternalBufferCount != 0)
{
int num = (this.InternalBufferCount > count) ? count : this.InternalBufferCount;
if (num != 0)
{
Buffer.BlockCopy(this.InternalBuffer, this.InternalOffset, buffer, offset, num);
this.DecrementInternalBufferCount(num);
}
if (asyncRequest != null)
{
asyncRequest.CompleteUser(num);
}
return num;
}
num2 = this.StartReading(buffer, offset, count, asyncRequest);
}
catch (Exception exception)
{
this._SslState.FinishRead(null);
flag = true;
if (exception is IOException)
{
throw;
}
throw new IOException(SR.GetString("net_io_read"), exception);
}
finally
{
if ((asyncRequest == null) || flag)
{
this._NestedRead = 0;
}
}
return num2;
}
private int ProcessFrameBody(int readBytes, byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
{
if (readBytes == 0)
{
throw new IOException(SR.GetString("net_io_eof"));
}
readBytes += this._SslState.HeaderSize;
int num = 0;
SecurityStatus errorCode = this._SslState.DecryptData(this.InternalBuffer, ref num, ref readBytes);
if (errorCode != SecurityStatus.OK)
{
byte[] dst = null;
if (readBytes != 0)
{
dst = new byte[readBytes];
Buffer.BlockCopy(this.InternalBuffer, num, dst, 0, readBytes);
}
this.DecrementInternalBufferCount(this.InternalBufferCount);
return this.ProcessReadErrorCode(errorCode, buffer, offset, count, asyncRequest, dst);
}
if ((readBytes == 0) && (count != 0))
{
this.DecrementInternalBufferCount(this.InternalBufferCount);
return -1;
}
this.EnsureInternalBufferSize(0, num + readBytes);
this.DecrementInternalBufferCount(num);
if (readBytes > count)
{
readBytes = count;
}
Buffer.BlockCopy(this.InternalBuffer, this.InternalOffset, buffer, offset, readBytes);
this.DecrementInternalBufferCount(readBytes);
this._SslState.FinishRead(null);
if (asyncRequest != null)
{
asyncRequest.CompleteUser(readBytes);
}
return readBytes;
}
private void FinishHandshake(Exception e, AsyncProtocolRequest asyncRequest)
{
try
{
lock (this)
{
if (e != null)
{
this.SetException(e);
}
this.FinishHandshakeRead(0);
if (Interlocked.CompareExchange(ref this._LockWriteState, 0, 2) == 3)
{
this._LockWriteState = 1;
object state = this._QueuedWriteStateRequest;
if (state != null)
{
this._QueuedWriteStateRequest = null;
if (state is LazyAsyncResult)
{
((LazyAsyncResult) state).InvokeCallback();
}
else
{
ThreadPool.QueueUserWorkItem(new WaitCallback(this.CompleteRequestWaitCallback), state);
}
}
}
}
}
finally
{
if (asyncRequest != null)
{
if (e != null)
{
asyncRequest.CompleteWithError(e);
}
else
{
asyncRequest.CompleteUser();
}
}
}
}