/// <summary>
/// Generate a packet with SMUX header
/// </summary>
/// <param name="packet">SNI packet</param>
/// <returns>Encapsulated SNI packet</returns>
private SNIPacket GetSMUXEncapsulatedPacket(SNIPacket packet)
{
uint xSequenceNumber = _sequenceNumber;
Span <byte> header = stackalloc byte[SNISMUXHeader.HEADER_LENGTH];
GetSMUXHeaderBytes(packet.Length, SNISMUXFlags.SMUX_DATA, header);
SNIPacket smuxPacket = new SNIPacket(SNISMUXHeader.HEADER_LENGTH + packet.Length);
smuxPacket.AppendData(header);
smuxPacket.AppendPacket(packet);
packet.Dispose();
return(smuxPacket);
}