AckEcnFrame class

An ACK frame with ECN (Explicit Congestion Notification) counts (RFC 9000 Section 19.3.2).

AckEcnFrame extends AckFrame by adding three ECN counters: ect0Count, ect1Count, and ceCount. These values allow the sender to detect ECN-capable path support and react to congestion experienced (CE) marks.

This frame type (0x03) is used instead of a plain ACK (0x02) when the peer has negotiated ECN support and the received packets carried ECN-capable codepoints.

See also:

  • AckFrame — the base ACK frame without ECN counts.
  • AckRange — the packet-number ranges carried by this frame.
  • RFC 9000 Section 19.3.2 — ACK frame with ECN counts.
Inheritance

Constructors

AckEcnFrame({required int largestAcknowledged, int ackDelay = 0, List<AckRange> ackRanges = const [], int ect0Count = 0, int ect1Count = 0, int ceCount = 0})
Creates an AckEcnFrame that acknowledges packets and reports ECN counts.

Properties

ackDelay → int
finalinherited
ackRanges → List<AckRange>
finalinherited
ceCount → int
Count of IP packets received with the CE codepoint.
final
ect0Count → int
Count of IP packets received with the ECT(0) codepoint.
final
ect1Count → int
Count of IP packets received with the ECT(1) codepoint.
final
frameType → int
no setteroverride
hashCode → int
The hash code for this object.
no setterinherited
isAckEliciting → bool
Whether this frame is ack-eliciting per RFC 9000 Table 3. Default is true; override for non-ack-eliciting frames.
no setterinherited
isInFlight → bool
Whether this frame counts toward bytes in flight per RFC 9000 Table 3. Default matches isAckEliciting; override for frames that are not ack-eliciting but still should not count (e.g., CONNECTION_CLOSE).
no setterinherited
largestAcknowledged → int
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
serialize() → Uint8List
override
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited