Critical control streams
03Each endpoint has one unidirectional control stream, beginning with SETTINGS.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 6.2.1 ↗
RFC 9114 · § 6.2.1EXAMPLE
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03
Keep it open
Closing the control stream breaks the connection rather than one request.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
SETTINGS must be the first control-stream frame.
- SETTINGS must be the first control-stream frame.
- A second control stream from the same peer is an error.
- Closing a critical control stream is a connection error.
Examples are illustrative. Consult the linked RFC and its errata for implementation details.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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