/// <summary>
/// Read targetLength bytes into target from buffered connection.
/// </summary>
public void Read(byte[] target, int targetLength)
{
int targetOffset = 0;
do
{
// Read from buffer.
if (this.pos < this.len)
{
int size = this.len - this.pos;
if (targetLength <= size)
{
// Buffer contains enough bytes. Copy buffer to target and return.
Buffer.BlockCopy(this.buffer, this.pos, target, targetOffset, targetLength);
this.pos += targetLength;
return;
}
// Buffer contains partial bytes. Copy remaining buffer to target
// and fall through to socket read to receive more bytes.
Buffer.BlockCopy(this.buffer, this.pos, target, targetOffset, size);
targetLength -= size;
targetOffset += size;
}
// Read from socket. Try to fill entire buffer.
this.len = conn.Read(this.buffer, 0, this.buffer.Length);
if (this.len <= 0)
{
throw new SocketException((int)SocketError.ConnectionReset);
}
this.pos = 0;
} while (true);
}