Function runProxy

internal/cmd/cmd.go:85–131

runProxy starts and runs the proxy. l must not be nil. TODO(e.burkov): Move into separate dnssvc package.

(ctx context.Context, l *slog.Logger, conf *configuration)

//
// TODO(e.burkov):  Move into separate dnssvc package.
func runProxy(ctx context.Context, l *slog.Logger, conf *configuration) (err error) {
	var (
		buildVersion = version.Version()
		revision     = version.Revision()
		branch       = version.Branch()
		commitTime   = version.CommitTime()
	)

	l.InfoContext(
		ctx,
		"dnsproxy starting",
		"version", buildVersion,
		"revision", revision,
		"branch", branch,
		"commit_time", commitTime,
	)

	// Prepare the proxy server and its configuration.
	proxyConf, err := createProxyConfig(ctx, l, conf)
	if err != nil {
		return fmt.Errorf("configuring proxy: %w", err)
	}

	dnsProxy, err := proxy.New(proxyConf)
	if err != nil {
		return fmt.Errorf("creating proxy: %w", err)
	}

	// Start the proxy server.
	err = dnsProxy.Start(ctx)
	if err != nil {
		return fmt.Errorf("starting dnsproxy: %w", err)
	}

	// TODO(e.burkov):  Use [service.SignalHandler].
	signalChannel := make(chan os.Signal, 1)
	signal.Notify(signalChannel, syscall.SIGINT, syscall.SIGTERM)
	<-signalChannel

	// Stopping the proxy.
	err = dnsProxy.Shutdown(ctx)
	if err != nil {
		return fmt.Errorf("stopping dnsproxy: %w", err)
	}

	return nil
}

// runPprof runs pprof server on localhost:6060.
//