*/
package okhttp3

import java.net.InetAddress
import java.net.UnknownHostException
import okhttp3.Dns.Companion.SYSTEM

/**
 * A domain name service that resolves IP addresses for host names. Most applications will use the
 * [system DNS service][SYSTEM], which is the default. Some applications may provide their own
 * implementation to use a different DNS server, to prefer IPv6 addresses, to prefer IPv4 addresses,

import okio.Buffer
import okio.ByteString.Companion.encodeUtf8

/**
 * An [RFC 3492] punycode decoder for converting ASCII to Unicode domain name labels. This is
 * intended for use in Internationalized Domain Names (IDNs).
 *
 * This class contains a Kotlin implementation of the pseudocode specified by RFC 3492. It includes
 * direct translation of the pseudocode presented there.
 *

      direction,
      streamId,
      length,
      formattedType,
      windowSizeIncrement,
    )
  }

  internal fun formattedType(type: Int): String = if (type < FRAME_NAMES.size) FRAME_NAMES[type] else format("0x%02x", type)

  /**
   * Looks up valid string representing flags from the table. Invalid combinations are represented
   * in binary.
   */
  fun formatFlags(
    type: Int,

  ) {
    if (Conscrypt.isConscrypt(sslSocket)) {
      // Enable session tickets.
      Conscrypt.setUseSessionTickets(sslSocket, true)

      // Enable ALPN.
      val names = alpnProtocolNames(protocols)
      Conscrypt.setApplicationProtocols(sslSocket, names.toTypedArray())
    } else {
      super.configureTlsExtensions(sslSocket, hostname, protocols)
    }
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =

      "x01234567890123456789012345678901234567890123456789012345678901x",
      "x01234567890123456789012345678901234567890123456789012345678901†",
      // OkHttp rejects domain names longer than 253 code points, the web platform tests don't.

    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<@JvmSuppressWildcards Protocol>,
  ) {
    val sslParameters = sslSocket.sslParameters

    val names = alpnProtocolNames(protocols)

    sslParameters.applicationProtocols = names.toTypedArray()

    sslSocket.sslParameters = sslParameters
  }

  @SuppressSignatureCheck
  override fun getSelectedProtocol(sslSocket: SSLSocket): String? {

   */
  @get:JvmName("type") val type: String,
  /**
   * Returns a specific media subtype, such as "plain" or "png", "mpeg", "mp4" or "xml".
   */
  @get:JvmName("subtype") val subtype: String,
  /** Alternating parameter names with their values, like `["charset", "utf-8"]`. */
  internal val parameterNamesAndValues: Array<String>,
) {
  /**
   * Returns the charset of this media type, or [defaultValue] if either this media type doesn't

 * to a remote host. Newer TLS options are quite useful:
 *
 *  * Server Name Indication (SNI) enables one IP address to negotiate secure connections for
 *    multiple domain names.
 *
 *  * Application Layer Protocol Negotiation (ALPN) enables the HTTPS port (443) to be used to
 *    negotiate HTTP/2.
 *
 * Unfortunately, older HTTPS servers refuse to connect when such options are presented. Rather than

   */
  var typeHint: Any?
    get() = typeHintStack.lastOrNull()
    set(value) {
      typeHintStack[typeHintStack.size - 1] = value
    }

  /** Names leading to the current location in the ASN.1 document. */
  private val path = mutableListOf<String>()

  /**
   * False unless we made a recursive call to [write] at the current stack frame. The explicit box

      if (host != null) {
        result.add(Header(TARGET_AUTHORITY, host)) // Optional.
      }
      result.add(Header(TARGET_SCHEME, request.url.scheme))

      for (i in 0 until headers.size) {
        // header names must be lowercase.
        val name = headers.name(i).lowercase(Locale.US)
        if (name !in HTTP_2_SKIPPED_REQUEST_HEADERS ||
          name == TE && headers.value(i) == "trailers"
        ) {