rustls-config-stream

[rustls::ServerConfig] and [rustls::ClientConfig] providers backed async streams.

This module exposes a [ServerConfigProvider] and [ClientConfigProvider]. Both function identically, holding the current config in an ArcSwap, providing a get_config() method to load the current config as a standard Arc, and storing a new config when it arrives from a user-supplied stream via a [ServerConfigStreamBuilder] or [ClientConfigStreamBuilder].

The background task performs exponential backoff (10ms -> 10s, doubling) when the stream fails, and attempts to re-create the stream via the builder.

Usage

• Implement [ServerConfigStreamBuilder] to produce a stream of fresh ServerConfig instances (e.g. reading from disk, a secret store, or watching a certificate manager).
• Start the provider with [ServerConfigProvider::start].
• Use [ServerConfigProvider::get_config] wherever you need the current config (e.g. inside an acceptor loop).
• Optionally monitor liveness via [ServerConfigProvider::stream_healthy].
• [ClientConfigProvider] works identically, only for [rustls::ClientConfig] instead of [rustls::ServerConfig].

Tracing

If the tracing feature is enabled, the provider will emit diagnostics (debug/info/error) about updates and reconnection attempts.