2 * Copyright (c) 2022 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.transport.ssh;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.util.concurrent.ListenableFuture;
14 import io.netty.bootstrap.Bootstrap;
15 import io.netty.bootstrap.ServerBootstrap;
16 import io.netty.channel.group.DefaultChannelGroup;
17 import io.netty.util.concurrent.GlobalEventExecutor;
18 import org.eclipse.jdt.annotation.NonNull;
19 import org.opendaylight.netconf.shaded.sshd.common.io.IoHandler;
20 import org.opendaylight.netconf.shaded.sshd.server.ServerFactoryManager;
21 import org.opendaylight.netconf.shaded.sshd.server.session.SessionFactory;
22 import org.opendaylight.netconf.transport.api.TransportChannelListener;
23 import org.opendaylight.netconf.transport.api.TransportStack;
24 import org.opendaylight.netconf.transport.api.UnsupportedConfigurationException;
25 import org.opendaylight.netconf.transport.tcp.TCPClient;
26 import org.opendaylight.netconf.transport.tcp.TCPServer;
27 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ssh.server.rev230417.SshServerGrouping;
28 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.tcp.client.rev230417.TcpClientGrouping;
29 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.tcp.server.rev230417.TcpServerGrouping;
32 * A {@link TransportStack} acting as an SSH server.
34 public final class SSHServer extends SSHTransportStack {
35 private final ServerFactoryManager serverFactoryManager;
36 private final SessionFactory serverSessionFactory;
38 private SSHServer(final TransportChannelListener listener, final ServerFactoryManager serverFactoryManager) {
40 this.serverFactoryManager = requireNonNull(serverFactoryManager);
41 this.serverFactoryManager.addSessionListener(new UserAuthSessionListener(sessionAuthHandlers, sessions));
42 serverSessionFactory = new SessionFactory(serverFactoryManager);
43 ioService = new SshIoService(this.serverFactoryManager,
44 new DefaultChannelGroup("sshd-server-channels", GlobalEventExecutor.INSTANCE),
45 serverSessionFactory);
49 IoHandler getSessionFactory() {
50 return serverSessionFactory;
53 public static @NonNull ListenableFuture<SSHServer> connect(final TransportChannelListener listener,
54 final Bootstrap bootstrap, final TcpClientGrouping connectParams, final SshServerGrouping serverParams)
55 throws UnsupportedConfigurationException {
56 final var server = newServer(listener, requireNonNull(serverParams), null);
57 return transformUnderlay(server, TCPClient.connect(server.asListener(), bootstrap, connectParams));
60 public static @NonNull ListenableFuture<SSHServer> listen(final TransportChannelListener listener,
61 final ServerBootstrap bootstrap, final TcpServerGrouping connectParams,
62 final SshServerGrouping serverParams) throws UnsupportedConfigurationException {
63 return listen(listener, bootstrap, connectParams, requireNonNull(serverParams), null);
67 * Builds and starts SSH Server.
69 * @param listener server channel listener, required
70 * @param bootstrap server bootstrap instance, required
71 * @param connectParams tcp transport configuration, required
72 * @param serverParams ssh overlay configuration, optional if configurator is defined, required otherwise
73 * @param configurator server factory manager configurator, optional if serverParams is defined, required otherwise
74 * @return server instance as listenable future
75 * @throws UnsupportedConfigurationException if any of configurations is invalid or incomplete
76 * @throws NullPointerException if any of required parameters is null
77 * @throws IllegalArgumentException if both configurator and serverParams are null
79 public static @NonNull ListenableFuture<SSHServer> listen(final TransportChannelListener listener,
80 final ServerBootstrap bootstrap, final TcpServerGrouping connectParams,
81 final SshServerGrouping serverParams, final ServerFactoryManagerConfigurator configurator)
82 throws UnsupportedConfigurationException {
83 checkArgument(serverParams != null || configurator != null,
84 "Neither server parameters nor factory configurator is defined");
85 final var server = newServer(listener, serverParams, configurator);
86 return transformUnderlay(server, TCPServer.listen(server.asListener(), bootstrap, connectParams));
89 private static SSHServer newServer(final TransportChannelListener listener, final SshServerGrouping serverParams,
90 final ServerFactoryManagerConfigurator configurator) throws UnsupportedConfigurationException {
91 return new SSHServer(listener, new TransportSshServer.Builder()
92 .serverParams(serverParams)
93 .configurator(configurator)