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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.sshd.common.session;

import java.io.IOException;

import org.apache.sshd.agent.local.AgentForwardedChannel;
import org.apache.sshd.common.Channel;
import org.apache.sshd.common.Service;
import org.apache.sshd.common.Session;
import org.apache.sshd.common.TcpipForwarder;

/**
 * Interface implementing ssh-connection service.
 *
 * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
 */

public interface ConnectionService extends Service {

    /**
     * Register a newly created channel with a new unique identifier
     *
     * @param channel the channel to register
     * @return the id of this channel
     * @throws Exception
     */

    int registerChannel(Channel channel) throws IOException;

    /**
     * Remove this channel from the list of managed channels
     *
     * @param channel the channel
     */

    void unregisterChannel(Channel channel);

    /**
     * Retrieve the tcpip forwarder
     * @return
     */

    TcpipForwarder getTcpipForwarder();

    // TODO: remove from interface, it's server side only
    String initAgentForward() throws IOException;

    // TODO: remove from interface, it's server side only
    String createX11Display(boolean singleConnection, String authenticationProtocol, String authenticationCookie, int screen) throws IOException;

    void setAllowMoreSessions(boolean allow);

}