From bbbc051aa70b8c3dc98218b7b7ca23bea588f41a Mon Sep 17 00:00:00 2001 From: Joe Robinson Date: Wed, 27 Oct 2010 17:16:37 +0100 Subject: Removed duplicate org.apache.commons files --- org/apache/commons/net/bsd/RCommandClient.java | 402 ------------------------- 1 file changed, 402 deletions(-) delete mode 100644 org/apache/commons/net/bsd/RCommandClient.java (limited to 'org/apache/commons/net/bsd/RCommandClient.java') diff --git a/org/apache/commons/net/bsd/RCommandClient.java b/org/apache/commons/net/bsd/RCommandClient.java deleted file mode 100644 index 50cb87a..0000000 --- a/org/apache/commons/net/bsd/RCommandClient.java +++ /dev/null @@ -1,402 +0,0 @@ -/* - * 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.commons.net.bsd; - -import java.io.IOException; -import java.io.InputStream; -import java.net.BindException; -import java.net.InetAddress; -import java.net.ServerSocket; -import java.net.Socket; -import java.net.SocketException; - -import org.apache.commons.net.io.SocketInputStream; - -/*** - * RCommandClient is very similar to - * {@link org.apache.commons.net.bsd.RExecClient}, - * from which it is derived, and implements the rcmd() facility that - * first appeared in 4.2BSD Unix. rcmd() is the facility used by the rsh - * (rshell) and other commands to execute a command on another machine - * from a trusted host without issuing a password. The trust relationship - * between two machines is established by the contents of a machine's - * /etc/hosts.equiv file and a user's .rhosts file. These files specify - * from which hosts and accounts on those hosts rcmd() requests will be - * accepted. The only additional measure for establishing trust is that - * all client connections must originate from a port between 512 and 1023. - * Consequently, there is an upper limit to the number of rcmd connections - * that can be running simultaneously. The required ports are reserved - * ports on Unix systems, and can only be bound by a - * process running with root permissions (to accomplish this rsh, rlogin, - * and related commands usualy have the suid bit set). Therefore, on a - * Unix system, you will only be able to successfully use the RCommandClient - * class if the process runs as root. However, there is no such restriction - * on Windows95 and some other systems. The security risks are obvious. - * However, when carefully used, rcmd() can be very useful when used behind - * a firewall. - *

- * As with virtually all of the client classes in org.apache.commons.net, this - * class derives from SocketClient. But it overrides most of its connection - * methods so that the local Socket will originate from an acceptable - * rshell port. The way to use RCommandClient is to first connect - * to the server, call the {@link #rcommand rcommand() } method, - * and then - * fetch the connection's input, output, and optionally error streams. - * Interaction with the remote command is controlled entirely through the - * I/O streams. Once you have finished processing the streams, you should - * invoke {@link org.apache.commons.net.bsd.RExecClient#disconnect disconnect() } - * to clean up properly. - *

- * By default the standard output and standard error streams of the - * remote process are transmitted over the same connection, readable - * from the input stream returned by - * {@link org.apache.commons.net.bsd.RExecClient#getInputStream getInputStream() } - * . However, it is - * possible to tell the rshd daemon to return the standard error - * stream over a separate connection, readable from the input stream - * returned by {@link org.apache.commons.net.bsd.RExecClient#getErrorStream getErrorStream() } - * . You - * can specify that a separate connection should be created for standard - * error by setting the boolean separateErrorStream - * parameter of {@link #rcommand rcommand() } to true . - * The standard input of the remote process can be written to through - * the output stream returned by - * {@link org.apache.commons.net.bsd.RExecClient#getOutputStream getOutputStream() } - * . - *

- *

- * @author Daniel F. Savarese - * @see org.apache.commons.net.SocketClient - * @see RExecClient - * @see RLoginClient - ***/ - -public class RCommandClient extends RExecClient -{ - /*** - * The default rshell port. Set to 514 in BSD Unix. - ***/ - public static final int DEFAULT_PORT = 514; - - /*** - * The smallest port number an rcmd client may use. By BSD convention - * this number is 512. - ***/ - public static final int MIN_CLIENT_PORT = 512; - - /*** - * The largest port number an rcmd client may use. By BSD convention - * this number is 1023. - ***/ - public static final int MAX_CLIENT_PORT = 1023; - - // Overrides method in RExecClient in order to implement proper - // port number limitations. - @Override - InputStream _createErrorStream() throws IOException - { - int localPort; - ServerSocket server; - Socket socket; - - localPort = MAX_CLIENT_PORT; - server = null; // Keep compiler from barfing - - for (localPort = MAX_CLIENT_PORT; localPort >= MIN_CLIENT_PORT; --localPort) - { - try - { - server = _serverSocketFactory_.createServerSocket(localPort, 1, - getLocalAddress()); - } - catch (SocketException e) - { - continue; - } - break; - } - - if (localPort < MIN_CLIENT_PORT) - throw new BindException("All ports in use."); - - _output_.write(Integer.toString(server.getLocalPort()).getBytes()); - _output_.write('\0'); - _output_.flush(); - - socket = server.accept(); - server.close(); - - if (isRemoteVerificationEnabled() && !verifyRemote(socket)) - { - socket.close(); - throw new IOException( - "Security violation: unexpected connection attempt by " + - socket.getInetAddress().getHostAddress()); - } - - return (new SocketInputStream(socket, socket.getInputStream())); - } - - /*** - * The default RCommandClient constructor. Initializes the - * default port to DEFAULT_PORT . - ***/ - public RCommandClient() - { - setDefaultPort(DEFAULT_PORT); - } - - - /*** - * Opens a Socket connected to a remote host at the specified port and - * originating from the specified local address using a port in a range - * acceptable to the BSD rshell daemon. - * Before returning, {@link org.apache.commons.net.SocketClient#_connectAction_ _connectAction_() } - * is called to perform connection initialization actions. - *

- * @param host The remote host. - * @param port The port to connect to on the remote host. - * @param localAddr The local address to use. - * @exception SocketException If the socket timeout could not be set. - * @exception BindException If all acceptable rshell ports are in use. - * @exception IOException If the socket could not be opened. In most - * cases you will only want to catch IOException since SocketException is - * derived from it. - ***/ - public void connect(InetAddress host, int port, InetAddress localAddr) - throws SocketException, BindException, IOException - { - int localPort; - - localPort = MAX_CLIENT_PORT; - - for (localPort = MAX_CLIENT_PORT; localPort >= MIN_CLIENT_PORT; --localPort) - { - try - { - _socket_ = - _socketFactory_.createSocket(host, port, localAddr, localPort); - } - catch (BindException be) { - continue; - } - catch (SocketException e) - { - continue; - } - break; - } - - if (localPort < MIN_CLIENT_PORT) - throw new BindException("All ports in use or insufficient permssion."); - - _connectAction_(); - } - - - - /*** - * Opens a Socket connected to a remote host at the specified port and - * originating from the current host at a port in a range acceptable - * to the BSD rshell daemon. - * Before returning, {@link org.apache.commons.net.SocketClient#_connectAction_ _connectAction_() } - * is called to perform connection initialization actions. - *

- * @param host The remote host. - * @param port The port to connect to on the remote host. - * @exception SocketException If the socket timeout could not be set. - * @exception BindException If all acceptable rshell ports are in use. - * @exception IOException If the socket could not be opened. In most - * cases you will only want to catch IOException since SocketException is - * derived from it. - ***/ - @Override - public void connect(InetAddress host, int port) - throws SocketException, IOException - { - connect(host, port, InetAddress.getLocalHost()); - } - - - /*** - * Opens a Socket connected to a remote host at the specified port and - * originating from the current host at a port in a range acceptable - * to the BSD rshell daemon. - * Before returning, {@link org.apache.commons.net.SocketClient#_connectAction_ _connectAction_() } - * is called to perform connection initialization actions. - *

- * @param hostname The name of the remote host. - * @param port The port to connect to on the remote host. - * @exception SocketException If the socket timeout could not be set. - * @exception BindException If all acceptable rshell ports are in use. - * @exception IOException If the socket could not be opened. In most - * cases you will only want to catch IOException since SocketException is - * derived from it. - * @exception UnknownHostException If the hostname cannot be resolved. - ***/ - @Override - public void connect(String hostname, int port) - throws SocketException, IOException - { - connect(InetAddress.getByName(hostname), port, InetAddress.getLocalHost()); - } - - - /*** - * Opens a Socket connected to a remote host at the specified port and - * originating from the specified local address using a port in a range - * acceptable to the BSD rshell daemon. - * Before returning, {@link org.apache.commons.net.SocketClient#_connectAction_ _connectAction_() } - * is called to perform connection initialization actions. - *

- * @param hostname The remote host. - * @param port The port to connect to on the remote host. - * @param localAddr The local address to use. - * @exception SocketException If the socket timeout could not be set. - * @exception BindException If all acceptable rshell ports are in use. - * @exception IOException If the socket could not be opened. In most - * cases you will only want to catch IOException since SocketException is - * derived from it. - ***/ - public void connect(String hostname, int port, InetAddress localAddr) - throws SocketException, IOException - { - connect(InetAddress.getByName(hostname), port, localAddr); - } - - - /*** - * Opens a Socket connected to a remote host at the specified port and - * originating from the specified local address and port. The - * local port must lie between MIN_CLIENT_PORT and - * MAX_CLIENT_PORT or an IllegalArgumentException will - * be thrown. - * Before returning, {@link org.apache.commons.net.SocketClient#_connectAction_ _connectAction_() } - * is called to perform connection initialization actions. - *

- * @param host The remote host. - * @param port The port to connect to on the remote host. - * @param localAddr The local address to use. - * @param localPort The local port to use. - * @exception SocketException If the socket timeout could not be set. - * @exception IOException If the socket could not be opened. In most - * cases you will only want to catch IOException since SocketException is - * derived from it. - * @exception IllegalArgumentException If an invalid local port number - * is specified. - ***/ - @Override - public void connect(InetAddress host, int port, - InetAddress localAddr, int localPort) - throws SocketException, IOException, IllegalArgumentException - { - if (localPort < MIN_CLIENT_PORT || localPort > MAX_CLIENT_PORT) - throw new IllegalArgumentException("Invalid port number " + localPort); - super.connect(host, port, localAddr, localPort); - } - - - /*** - * Opens a Socket connected to a remote host at the specified port and - * originating from the specified local address and port. The - * local port must lie between MIN_CLIENT_PORT and - * MAX_CLIENT_PORT or an IllegalArgumentException will - * be thrown. - * Before returning, {@link org.apache.commons.net.SocketClient#_connectAction_ _connectAction_() } - * is called to perform connection initialization actions. - *

- * @param hostname The name of the remote host. - * @param port The port to connect to on the remote host. - * @param localAddr The local address to use. - * @param localPort The local port to use. - * @exception SocketException If the socket timeout could not be set. - * @exception IOException If the socket could not be opened. In most - * cases you will only want to catch IOException since SocketException is - * derived from it. - * @exception UnknownHostException If the hostname cannot be resolved. - * @exception IllegalArgumentException If an invalid local port number - * is specified. - ***/ - @Override - public void connect(String hostname, int port, - InetAddress localAddr, int localPort) - throws SocketException, IOException, IllegalArgumentException - { - if (localPort < MIN_CLIENT_PORT || localPort > MAX_CLIENT_PORT) - throw new IllegalArgumentException("Invalid port number " + localPort); - super.connect(hostname, port, localAddr, localPort); - } - - - /*** - * Remotely executes a command through the rshd daemon on the server - * to which the RCommandClient is connected. After calling this method, - * you may interact with the remote process through its standard input, - * output, and error streams. You will typically be able to detect - * the termination of the remote process after reaching end of file - * on its standard output (accessible through - * {@link #getInputStream getInputStream() }. Disconnecting - * from the server or closing the process streams before reaching - * end of file will not necessarily terminate the remote process. - *

- * If a separate error stream is requested, the remote server will - * connect to a local socket opened by RCommandClient, providing an - * independent stream through which standard error will be transmitted. - * The local socket must originate from a secure port (512 - 1023), - * and rcommand() ensures that this will be so. - * RCommandClient will also do a simple security check when it accepts a - * connection for this error stream. If the connection does not originate - * from the remote server, an IOException will be thrown. This serves as - * a simple protection against possible hijacking of the error stream by - * an attacker monitoring the rexec() negotiation. You may disable this - * behavior with - * {@link org.apache.commons.net.bsd.RExecClient#setRemoteVerificationEnabled setRemoteVerificationEnabled()} - * . - *

- * @param localUsername The user account on the local machine that is - * requesting the command execution. - * @param remoteUsername The account name on the server through which to - * execute the command. - * @param command The command, including any arguments, to execute. - * @param separateErrorStream True if you would like the standard error - * to be transmitted through a different stream than standard output. - * False if not. - * @exception IOException If the rcommand() attempt fails. The exception - * will contain a message indicating the nature of the failure. - ***/ - public void rcommand(String localUsername, String remoteUsername, - String command, boolean separateErrorStream) - throws IOException - { - rexec(localUsername, remoteUsername, command, separateErrorStream); - } - - - /*** - * Same as - * rcommand(localUsername, remoteUsername, command, false); - ***/ - public void rcommand(String localUsername, String remoteUsername, - String command) - throws IOException - { - rcommand(localUsername, remoteUsername, command, false); - } - -} - -- cgit v1.2.3