TCP CUBIC algorithm.
https://datatracker.ietf.org/doc/html/rfc8312
Congestion window.
Decrease congestion window upon negative feedback (loss or congestion mark).
Timestamp of negative feedback.
Increase congestion window.
Timestamp of positive feedback (successful retrieval without congestion mark).
Round-trip time when the positive feedback is received.
Protected
TCP CUBIC algorithm.
See
https://datatracker.ietf.org/doc/html/rfc8312