get() = (javaNetSocket as? SSLSocket)?.session?.handshake()

  val handshakeServerNames: List<String>
    get() =
      (javaNetSocket as? SSLSocket)
        ?.let { Platform.Companion.get().getHandshakeServerNames(it) }
        ?: listOf()

  fun shutdownInput() {
    javaNetSocket.shutdownInput()
  }

  fun shutdownOutput() {
    javaNetSocket.shutdownOutput()
  }

  /** For MockWebServer. This returns the inbound SNI names. */
  @IgnoreJRERequirement // This function is overridden to require API >= 24.
  open fun getHandshakeServerNames(sslSocket: SSLSocket): List<String> {
    val session = sslSocket.session as? ExtendedSSLSession ?: return listOf()
    return try {
      session.requestedServerNames.mapNotNull { (it as? SNIHostName)?.asciiName }