Function determineTargetCSM

stats/opentelemetry/csm/pluginoption.go:271–279

(parsedTarget *url.URL)

const metadataExchangeKey = "x-envoy-peer-metadata"

func determineTargetCSM(parsedTarget *url.URL) bool {
	// On the client-side, the channel target is used to determine if a channel is a
	// CSM channel or not. CSM channels need to have an “xds” scheme and a
	// "traffic-director-global.xds.googleapis.com" authority. In the cases where no
	// authority is mentioned, the authority is assumed to be CSM. MetadataExchange
	// is performed only for CSM channels. Non-metadata exchange labels are detected
	// as described below.
	return parsedTarget.Scheme == "xds" && (parsedTarget.Host == "" || parsedTarget.Host == "traffic-director-global.xds.googleapis.com")
}