public static Datagram Create(IStreamBuffer streamBuffer)
{
var index = -1;
while ((index = streamBuffer.IndexOf(Datagram.DatagramHeader)) >= 0)
{
streamBuffer.Seek(index);
if (streamBuffer.Length < 13)
{
return(null);
}
var buffer = new byte[5];
streamBuffer.ReadOnly(buffer, 0, buffer.Length);
var length = (buffer[1] << 24) + (buffer[2] << 16) + (buffer[3] << 8) + (buffer[4]);
if (length + 13 >= streamBuffer.Capacity)
{
streamBuffer.Reset();
return(null);
}
if (streamBuffer.Length < length + 13)
{
return(null);
}
var data = new byte[length + 13];
streamBuffer.ReadOnly(data, 0, data.Length);
if (DatagramFactory.Verify(data))
{
streamBuffer.Seek(data.Length);
return(DatagramFactory.Create(data));
}
else
{
streamBuffer.Seek(1);
}
}
return(null);
}
