Support attaching application-layer stream protocols to existing flows - #61
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mishtak00
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agnosticdev,
ekinnear and
tfpauly
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July 29, 2026 18:20
tfpauly
approved these changes
Jul 30, 2026
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Added a general primitive for attaching an upper stream protocol onto an already-existing flow, for cases where a listener's stack has as application-layer protocol that must be added on top of inbound streams.
All changes:
attachLowerStreamProtocolToExistingFlow(listener:flowReference:)as anInboundStreamHandlerrequirement, with witnesses on the OneToOne and Top stream extensions,EINVALonStreamEndpointFlowProtocol(its lower is wired at construction), andENOTSUPonStreamPerfTestHandler. Reference dispatch covers.tls,.streamEndpointFlow,.customdeliverEnqueuedInboundStreamData(flowReference:)to replay data buffered before the upper protocol attachednewProtocolInstance(context:)on protocol options (nil onAbstractProtocolOptions, overridden inProtocolOptions<P>) so a custom application protocol can be materialized per flow without naming a concrete type