// auth credentials.
    rawSocket?.closeQuietly()

    val nextAttempt = attempt + 1
    return when {
      nextAttempt < MAX_TUNNEL_ATTEMPTS -> {
        call.eventListener.connectEnd(call, route.socketAddress, route.proxy, null)
        ConnectResult(
          plan = this,
          nextPlan =
            copy(
              attempt = nextAttempt,
              tunnelRequest = nextTunnelRequest,
            ),