HasRetransmittableFrames returns true if at least one frame is retransmittable.

IsFrameRetransmittable returns true if the frame should be retransmitted.

NewPacketList returns an initialized list.

NewReceivedPacketHandler creates a new receivedPacketHandler.

NewSentPacketHandler creates a new sentPacketHandler.

ErrAckForSkippedPacket occurs when the client sent an ACK for a packet number that we intentionally skipped.

ErrDuplicateOrOutOfOrderAck occurs when a duplicate or an out-of-order ACK is received.

ErrTooManyTrackedSentPackets occurs when the sentPacketHandler has to keep track of too many packets.

A Packet is a packet +gen linkedlist.

PacketElement is an element of a linked list.

PacketList represents a doubly linked list.

ReceivedPacketHandler handles ACKs needed to send for incoming packets.

SentPacketHandler handles ACKs received for outgoing packets.