HasAckElicitingFrames returns true if at least one frame is ack-eliciting.

IsFrameAckEliciting returns true if the frame is ack-eliciting.

NewAckHandler creates a new SentPacketHandler and a new ReceivedPacketHandler.

SendAck means an ACK-only packet should be sent.

SendAny means that any packet should be sent.

SendNone means that no packets should be sent.

SendPTOAppData means that an Application data probe packet should be sent.

SendPTOHandshake means that a Handshake probe packet should be sent.

SendPTOInitial means that an Initial probe packet should be sent.

A Packet is a packet.

ReceivedPacketHandler handles ACKs needed to send for incoming packets.

SentPacketHandler handles ACKs received for outgoing packets.

The SendMode says what kind of packets can be sent.