Function isLocalhostMode

run.go:494–517

isLocalhostMode returns true if listen is only listening for the local host.

(c *config.Config)

// isLocalhostMode returns true if listen is only listening for the local host.
func isLocalhostMode(c *config.Config) bool {
	if c.SetupRouter {
		// The listen arg is irrelevant when in router mode.
		return false
	}
	for _, listen := range c.Listens {
		if host, _, err := net.SplitHostPort(listen); err == nil {
			switch host {
			case "localhost", "127.0.0.1", "::1":
				continue
			}
			if ips := hosts.LookupHost(host); len(ips) > 0 {
				for _, ip := range ips {
					if !net.ParseIP(ip).IsLoopback() {
						return false
					}
				}
			} else if !net.ParseIP(host).IsLoopback() {
				return false
			}
		}
	}
	return true
}

func maybeUseResolvedCompatListen(c *config.Config, log host.Logger) {
	if runtime.GOOS != "linux" || c.SetupRouter || !resolved.Available() {