/// <summary>
/// Require lock.
/// </summary>
/// <param name="packetId"></param>
/// <returns></returns>
QoSState GetStateAndChecks(int packetId)
{
if (packetId > _idStore._entries.Length)
{
throw new ProtocolViolationException("The sender acknowledged a packet id that does not exist.");
}
QoSState state = _idStore._entries[packetId].Content._state;
if (state == QoSState.None)
{
throw new ProtocolViolationException("The sender acknowledged a packet id that does not exist.");
}
Debug.Assert(!state.HasFlag(QoSState.Dropped));
return(state);
}
static bool WasPacketNeverAcked(QoSState state) => (state & QoSState.PacketAckedMask) == QoSState.None;
