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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.conscrypt;

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import javax.net.ssl.SSLServerSocket;

/**
 * BoringSSL-based implementation of server sockets.
 */
final class ConscryptServerSocket extends SSLServerSocket {
    private final SSLParametersImpl sslParameters;
    private boolean channelIdEnabled;
    private boolean useEngineSocket;

    ConscryptServerSocket(SSLParametersImpl sslParameters) throws IOException {
        this.sslParameters = sslParameters;
    }

    ConscryptServerSocket(int port, SSLParametersImpl sslParameters)
        throws IOException {
        super(port);
        this.sslParameters = sslParameters;
    }

    ConscryptServerSocket(int port, int backlog, SSLParametersImpl sslParameters)
        throws IOException {
        super(port, backlog);
        this.sslParameters = sslParameters;
    }

    ConscryptServerSocket(int port,
                                      int backlog,
                                      InetAddress iAddress,
                                      SSLParametersImpl sslParameters)
        throws IOException {
        super(port, backlog, iAddress);
        this.sslParameters = sslParameters;
    }

    /**
     * Configures the socket to be created for this instance.
     */
    ConscryptServerSocket setUseEngineSocket(boolean useEngineSocket) {
        this.useEngineSocket = useEngineSocket;
        return this;
    }

    @Override
    public boolean getEnableSessionCreation() {
        return sslParameters.getEnableSessionCreation();
    }

    @Override
    public void setEnableSessionCreation(boolean flag) {
        sslParameters.setEnableSessionCreation(flag);
    }

    /**
     * The names of the protocols' versions that may be used on this SSL
     * connection.
     * @return an array of protocols names
     */
    @Override
    public String[] getSupportedProtocols() {
        return NativeCrypto.getSupportedProtocols();
    }

    /**
     * The names of the protocols' versions that in use on this SSL connection.
     *
     * @return an array of protocols names
     */
    @Override
    public String[] getEnabledProtocols() {
        return sslParameters.getEnabledProtocols();
    }

    /**
     * This method enables the protocols' versions listed by
     * getSupportedProtocols().
     *
     * @param protocols names of all the protocols to enable.
     *
     * @throws IllegalArgumentException when one or more of the names in the
     *             array are not supported, or when the array is null.
     */
    @Override
    public void setEnabledProtocols(String[] protocols) {
        sslParameters.setEnabledProtocols(protocols);
    }

    @Override
    public String[] getSupportedCipherSuites() {
        return NativeCrypto.getSupportedCipherSuites();
    }

    @Override
    public String[] getEnabledCipherSuites() {
        return sslParameters.getEnabledCipherSuites();
    }

    /**
     * Enables/disables the TLS Channel ID extension for this server socket.
     */
    void setChannelIdEnabled(boolean enabled) {
      channelIdEnabled = enabled;
    }

    /**
     * Checks whether the TLS Channel ID extension is enabled for this server socket.
     */
    boolean isChannelIdEnabled() {
      return channelIdEnabled;
    }

    /**
     * This method enables the cipher suites listed by
     * getSupportedCipherSuites().
     *
     * @param suites the names of all the cipher suites to enable
     * @throws IllegalArgumentException when one or more of the ciphers in array
     *         suites are not supported, or when the array is null.
     */
    @Override
    public void setEnabledCipherSuites(String[] suites) {
        sslParameters.setEnabledCipherSuites(suites);
    }

    @Override
    public boolean getWantClientAuth() {
        return sslParameters.getWantClientAuth();
    }

    @Override
    public void setWantClientAuth(boolean want) {
        sslParameters.setWantClientAuth(want);
    }

    @Override
    public boolean getNeedClientAuth() {
        return sslParameters.getNeedClientAuth();
    }

    @Override
    public void setNeedClientAuth(boolean need) {
        sslParameters.setNeedClientAuth(need);
    }

    @Override
    public void setUseClientMode(boolean mode) {
        sslParameters.setUseClientMode(mode);
    }

    @Override
    public boolean getUseClientMode() {
        return sslParameters.getUseClientMode();
    }

    @Override
    public Socket accept() throws IOException {
        final AbstractConscryptSocket socket;
        if (useEngineSocket) {
            socket = Platform.createEngineSocket(sslParameters);
        } else {
            socket = Platform.createFileDescriptorSocket(sslParameters);
        }

        socket.setChannelIdEnabled(channelIdEnabled);
        implAccept(socket);
        return socket;
    }
}