Bug 243231 - TCP/ECN - RFC3168 specifies retransmissions not to be marked ECT in the IP header
Summary: TCP/ECN - RFC3168 specifies retransmissions not to be marked ECT in the IP he...
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-net mailing list
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-01-09 22:08 UTC by Richard Scheffenegger
Modified: 2020-01-10 05:28 UTC (History)
3 users (show)

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Description Richard Scheffenegger 2020-01-09 22:08:05 UTC
While investigating the interaction between ECN and RTO, I noticed that FBSD sends out retransmissions on ECN-enabled flows with the ECT0 codepoint in the
IP header - which is only permissible with ECN++ (work in progress as IETF draft).

This is not a critical deviation from the specs, only a lack of conformance.