* See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3

import okio.IOException

/**
 * Protocols that OkHttp implements for [ALPN][ietf_alpn] selection.
 *
 * ## Protocol vs Scheme
 *
 * Despite its name, [java.net.URL.getProtocol] returns the [scheme][java.net.URI.getScheme] (http,

  private val routeDatabase: RouteDatabase,
  private val call: RealCall,
  request: Request,
) : RoutePlanner {
  private val doExtensiveHealthChecks = request.method != "GET"
  private var routeSelection: RouteSelector.Selection? = null
  private var routeSelector: RouteSelector? = null
  private var nextRouteToTry: Route? = null

  override val deferredPlans = ArrayDeque<Plan>()

  override fun isCanceled(): Boolean = call.isCanceled()

a "vendor/" prefix also maintains the invariant that standard
library packages begin with a dotless path element.

The module requirements of std and cmd do not influence version
selection in other modules. They are only considered when running
module commands like 'go get' and 'go mod vendor' from a directory
in GOROOT/src.

Maintaining vendor directories
==============================

pkg go/types, const RecvVar VarKind #70250
pkg go/types, const ResultVar = 5 #70250
pkg go/types, const ResultVar VarKind #70250
pkg go/types, func LookupSelection(Type, bool, *Package, string) (Selection, bool) #70737
pkg go/types, method (*Var) Kind() VarKind #70250
pkg go/types, method (*Var) SetKind(VarKind) #70250
pkg go/types, method (VarKind) String() string #70250
pkg go/types, type VarKind uint8 #70250

 * selected in the static initializer of AbstractFuture. This is convenient and performant but
 * introduces some testing difficulties. This test exercises the fallback strategies.
 *
 * <p>To force selection of our fallback strategies, we load {@link AbstractFuture} (and all of
 * {@code com.google.common.util.concurrent}) in degenerate class loaders which make certain

  fun recordedConnectionEventTypes(): List<String> = connectionListener.recordedEventTypes()

  companion object {
    /**
     * A network that resolves only one IP address per host. Use this when testing route selection
     * fallbacks to prevent the host machine's various IP addresses from interfering.
     */
    private val SINGLE_INET_ADDRESS_DNS =
      Dns { hostname ->
        val addresses = Dns.SYSTEM.lookup(hostname)

 * strategies.
 *
 * <ul>
 *   <li>SafeAtomicHelper: uses Atomic FieldsUpdaters to implement synchronization
 *   <li>SynchronizedHelper: uses {@code synchronized} blocks for synchronization
 * </ul>
 *
 * To force selection of our fallback strategies we load {@link AggregateFutureState} (and all of
 * {@code com.google.common.util.concurrent}) in degenerate class loaders which make certain

     */
    public boolean isUsableForChannel() {
        return address != null && !address.isLoopbackAddress() && !address.isLinkLocalAddress();
    }

    /**
     * Get a score for interface selection (higher is better)
     *
     * @return interface score
     */
    public int getScore() {
        int score = linkSpeed; // Base score is link speed

        if (rssCapable)

 * selected in the static initializer of AbstractFuture. This is convenient and performant but
 * introduces some testing difficulties. This test exercises the fallback strategies.
 *
 * <p>To force selection of our fallback strategies, we load {@link AbstractFuture} (and all of
 * {@code com.google.common.util.concurrent}) in degenerate class loaders which make certain

        for (LoadBalancingStrategy strategy : strategies) {
            loadBalancer.setStrategy(strategy);
            assertEquals(strategy, loadBalancer.getStrategy());
        }

        // Test channel selection with mock request when no channels available
        ServerMessageBlock2Request mockRequest = mock(ServerMessageBlock2Request.class);
        when(mockRequest.getTreeId()).thenReturn(123);