import org.apache.sshd.client.future.OpenFuture; //导入依赖的package包/类
@Override
public void sessionCreated(final IoSession session) throws Exception {
    final TcpipClientChannel channel;
    int localPort = ((InetSocketAddress) session.getLocalAddress()).getPort();
    if (localToRemote.containsKey(localPort)) {
        SshdSocketAddress remote = localToRemote.get(localPort);
        channel = new TcpipClientChannel(TcpipClientChannel.Type.Direct, session, remote);
    } else {
        channel = new TcpipClientChannel(TcpipClientChannel.Type.Forwarded, session, null);
    }
    session.setAttribute(TcpipClientChannel.class, channel);
    this.session.registerChannel(channel);
    channel.open().addListener(new SshFutureListener<OpenFuture>() {
        @Override
        public void operationComplete(OpenFuture future) {
            Throwable t = future.getException();
            if (t != null) {
                DefaultTcpipForwarder.this.session.unregisterChannel(channel);
                channel.close(false);
            }
        }
    });
}
 

import org.apache.sshd.client.future.OpenFuture; //导入依赖的package包/类
@Deprecated
private void openChannel() throws IOException {
    channel = session.createSubsystemChannel("netconf");
    OpenFuture channelFuture = channel.open();
    if (channelFuture.await(connectTimeout, TimeUnit.SECONDS)) {
        if (channelFuture.isOpened()) {
            streamHandler = new NetconfStreamThread(channel.getInvertedOut(), channel.getInvertedIn(),
                    channel.getInvertedErr(), deviceInfo,
                    new NetconfSessionDelegateImpl(), replies);
        } else {
            throw new NetconfException("Failed to open channel with device " +
                    deviceInfo);
        }
        sendHello();
    }
}
 

import org.apache.sshd.client.future.OpenFuture; //导入依赖的package包/类
@Override
public void operationComplete(OpenFuture future) {
    if ( ! future.isOpened() ) {
        log.error("Failed to execute bootstrap command for agent [{}]", connection.getAgentId(), future.getException());
        connection.close();
    }
}
 

import org.apache.sshd.client.future.OpenFuture; //导入依赖的package包/类
protected AgentConnection createConnection(Agent agent, SshConnectionOptions opts) throws IOException, InterruptedException {
    SshClient client = getClient();
    ClientSession session = null;
    boolean success = false;
    try {
        session = connect(client, opts);
        String hostIp = getIp(opts);

        String script = copyBootStrap(session);
        int port = setForwarding(session);
        log.info("Allocated random port [{}] on [{}]", port, opts.getHost());
        EofAwareChannelExec exec = callBootStrap(agent, session, String.format("%s --read-env --port %d --ip %s", script, port, hostIp));

        final SshAgentConnection sshAgent = new SshAgentConnection(agent.getId(), agent.getUri(), eventService, this, session, exec, port);
        success = true;
        connections.add(sshAgent);

        exec.onEof(new Runnable() {
            @Override
            public void run() {
                sshAgent.close();
            }
        });

        CloseListener listener = new CloseListener(sshAgent);
        session.addListener(listener);
        OpenFuture execOpen = exec.open();

        execOpen.addListener(listener);

        try {
            execOpen.await(SSH_TIMEOUT.get(), TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
            throw new IllegalStateException("Interrupted waiting for script [" + script + "]", e);
        }

        if ( ! execOpen.isOpened() ) {
            throw new IOException("Failed to start script [" + script + "]");
        }

        success = writeAuth(sshAgent);
        if ( ! success ) {
            sshAgent.close();
            throw new IOException("Failed to write context info for agent [" + sshAgent.getAgentId() + "]");
        }

        return sshAgent;
    } finally {
        if ( ! success && session != null ) {
            session.close(true);
        }
    }
}
 

import org.apache.sshd.client.future.OpenFuture; //导入依赖的package包/类
protected AgentConnection createConnection(Agent agent, SshConnectionOptions opts) throws IOException, InterruptedException {
    SshClient client = getClient();
    ClientSession session = null;
    boolean success = false;
    try {
        session = connect(client, opts);
        String hostIp = getIp(opts);

        String script = copyBootStrap(session);
        int port = setForwarding(session);
        log.info("Allocated random port [{}] on [{}]", port, opts.getHost());
        EofAwareChannelExec exec = callBootStrap(agent, session, String.format("%s --port %d --ip %s", script, port, hostIp));

        final SshAgentConnection sshAgent = new SshAgentConnection(agent.getId(), agent.getUri(), eventService, this, session, exec, port);
        success = true;
        connections.add(sshAgent);

        exec.onEof(new Runnable() {
            @Override
            public void run() {
                sshAgent.close();
            }
        });

        CloseListener listener = new CloseListener(sshAgent);
        session.addListener(listener);
        OpenFuture execOpen = exec.open();

        execOpen.addListener(listener);

        try {
            execOpen.await(SSH_TIMEOUT.get(), TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
            throw new IllegalStateException("Interrupted waiting for script [" + script + "]", e);
        }

        if ( ! execOpen.isOpened() ) {
            throw new IOException("Failed to start script [" + script + "]");
        }

        success = writeAuth(sshAgent);
        if ( ! success ) {
            sshAgent.close();
            throw new IOException("Failed to write context info for agent [" + sshAgent.getAgentId() + "]");
        }

        return sshAgent;
    } finally {
        if ( ! success && session != null ) {
            session.close(true);
        }
    }
}