private val poolConnectionListener: ConnectionListener,
  private val chain: RealInterceptorChain,
) : ConnectionUser {
  private val eventListener: EventListener
    get() = call.eventListener

  override fun addPlanToCancel(connectPlan: ConnectPlan) {
    call.plansToCancel += connectPlan
  }

  override fun removePlanToCancel(connectPlan: ConnectPlan) {
    call.plansToCancel -= connectPlan
  }

  override fun connectTcp(): ConnectResult {
    check(rawSocket == null) { "TCP already connected" }

    var success = false

    // Tell the call about the connecting call so async cancels work.
    user.addPlanToCancel(this)
    try {
      user.connectStart(route)

      connectSocket()
      success = true
      return ConnectResult(plan = this)
    } catch (e: IOException) {