001/* ***** BEGIN LICENSE BLOCK *****
002 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
003 *
004 * The contents of this file are subject to the Mozilla Public License Version
005 * 1.1 (the "License"); you may not use this file except in compliance with
006 * the License. You may obtain a copy of the License at
007 * http://www.mozilla.org/MPL/
008 *
009 * Software distributed under the License is distributed on an "AS IS" basis,
010 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
011 * for the specific language governing rights and limitations under the
012 * License.
013 *
014 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
015 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
016 *
017 * The Initial Developer of the Original Code is
018 * Agfa Healthcare.
019 * Portions created by the Initial Developer are Copyright (C) 2012
020 * the Initial Developer. All Rights Reserved.
021 *
022 * Contributor(s):
023 * See @authors listed below
024 *
025 * Alternatively, the contents of this file may be used under the terms of
026 * either the GNU General Public License Version 2 or later (the "GPL"), or
027 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
028 * in which case the provisions of the GPL or the LGPL are applicable instead
029 * of those above. If you wish to allow use of your version of this file only
030 * under the terms of either the GPL or the LGPL, and not to allow others to
031 * use your version of this file under the terms of the MPL, indicate your
032 * decision by deleting the provisions above and replace them with the notice
033 * and other provisions required by the GPL or the LGPL. If you do not delete
034 * the provisions above, a recipient may use your version of this file under
035 * the terms of any one of the MPL, the GPL or the LGPL.
036 *
037 * ***** END LICENSE BLOCK ***** */
038
039package org.dcm4che3.tool.syslogd;
040
041import java.io.File;
042import java.io.FileOutputStream;
043import java.io.IOException;
044import java.net.InetAddress;
045import java.net.MalformedURLException;
046import java.util.ResourceBundle;
047import java.util.concurrent.ExecutorService;
048import java.util.concurrent.Executors;
049import java.util.concurrent.ScheduledExecutorService;
050
051import org.apache.commons.cli.CommandLine;
052import org.apache.commons.cli.MissingOptionException;
053import org.apache.commons.cli.OptionBuilder;
054import org.apache.commons.cli.Options;
055import org.apache.commons.cli.ParseException;
056import org.dcm4che3.net.Connection;
057import org.dcm4che3.net.Connection.Protocol;
058import org.dcm4che3.net.Device;
059import org.dcm4che3.net.audit.AuditRecordHandler;
060import org.dcm4che3.net.audit.AuditRecordRepository;
061import org.dcm4che3.tool.common.CLIUtils;
062import org.dcm4che3.util.StringUtils;
063
064/**
065 * @author Gunter Zeilinger <gunterze@gmail.com>
066 *
067 */
068public class Syslogd {
069
070    private static final ResourceBundle rb =
071            ResourceBundle.getBundle("org.dcm4che3.tool.syslogd.messages");
072
073    private final Device device = new Device("syslogd");
074    private final AuditRecordRepository arr = new AuditRecordRepository();
075    private final Connection conn = new Connection();
076    private File storageDir;
077    private final AuditRecordHandler handler = new AuditRecordHandler() {
078
079        @Override
080        public void onMessage(byte[] data, int xmlOffset, int xmlLength,
081                Connection conn, InetAddress from) {
082            Syslogd.this.onMessage(data, xmlOffset, xmlLength, conn, from);
083        }
084    };
085
086    public Syslogd() {
087        device.addDeviceExtension(arr);
088        device.addConnection(conn);
089        arr.setAuditRecordHandler(handler);
090    }
091
092    public void setStorageDirectory(String storageDir) {
093        this.storageDir = storageDir != null ? new File(storageDir) : null;
094    }
095
096    private static CommandLine parseComandLine(String[] args)
097            throws ParseException {
098        Options opts = new Options();
099        addOptions(opts);
100        CLIUtils.addSocketOptions(opts);
101        CLIUtils.addTLSOptions(opts);
102        CLIUtils.addCommonOptions(opts);
103        return CLIUtils.parseComandLine(args, opts, rb, Syslogd.class);
104    }
105
106    @SuppressWarnings("static-access")
107    public static void addOptions(Options opts) {
108        opts.addOption(null, "ignore", false, rb.getString("ignore"));
109        opts.addOption(OptionBuilder
110                .hasArg()
111                .withArgName("path")
112                .withDescription(rb.getString("directory"))
113                .withLongOpt("directory")
114                .create(null));
115        opts.addOption(OptionBuilder
116                .hasArg()
117                .withArgName("[ip:]port")
118                .withDescription(rb.getString("bind-server"))
119                .withLongOpt("bind")
120                .create("b"));
121        opts.addOption(OptionBuilder
122                .hasArg()
123                .withArgName("ms")
124                .withDescription(rb.getString("idle-timeout"))
125                .withLongOpt("idle-timeout")
126                .create(null));
127        opts.addOption(null, "udp", false, rb.getString("udp"));
128    }
129
130    public static void main(String[] args) {
131        try {
132            CommandLine cl = parseComandLine(args);
133            Syslogd main = new Syslogd();
134            configure(main, cl);
135            ExecutorService executorService = Executors.newCachedThreadPool();
136            ScheduledExecutorService scheduledExecutorService = 
137                    Executors.newSingleThreadScheduledExecutor();
138            main.device.setScheduledExecutor(scheduledExecutorService);
139            main.device.setExecutor(executorService);
140            main.device.bindConnections();
141        } catch (ParseException e) {
142            System.err.println("syslogd: " + e.getMessage());
143            System.err.println(rb.getString("try"));
144            System.exit(2);
145        } catch (Exception e) {
146            System.err.println("syslogd: " + e.getMessage());
147            e.printStackTrace();
148            System.exit(2);
149        }
150    }
151
152    private static void configure(Syslogd main, CommandLine cl)
153            throws Exception, MalformedURLException, ParseException,
154            IOException {
155        if (!cl.hasOption("ignore"))
156            main.setStorageDirectory(
157                    cl.getOptionValue("directory", "."));
158        configureBindServer(main.conn, cl);
159        main.setProtocol(toProtocol(cl));
160        main.arr.addConnection(main.conn);
161        CLIUtils.configure(main.conn, cl);
162    }
163
164    private void setProtocol(Protocol protocol) {
165        conn.setProtocol(protocol);
166        arr.addConnection(conn);
167    }
168
169    private static void configureBindServer(Connection conn, CommandLine cl)
170            throws ParseException {
171        if (!cl.hasOption("b"))
172            throw new MissingOptionException(
173                    CLIUtils.rb.getString("missing-bind-opt"));
174        String aeAtHostPort = cl.getOptionValue("b");
175        String[] hostAndPort = StringUtils.split(aeAtHostPort, ':');
176        int portIndex = hostAndPort.length - 1;
177        conn.setPort(Integer.parseInt(hostAndPort[portIndex]));
178        if (portIndex > 0)
179            conn.setHostname(hostAndPort[0]);
180    }
181
182    private static Protocol toProtocol(CommandLine cl) {
183        return cl.hasOption("udp")
184                ? Connection.Protocol.SYSLOG_UDP
185                : Connection.Protocol.SYSLOG_TLS;
186    }
187
188    private void onMessage(byte[] data, int off, int len, Connection conn,
189            InetAddress from) {
190            if (storageDir != null) 
191                try {
192                    storeToFile(data, off, len,
193                            File.createTempFile("syslog", ".xml", storageDir));
194                } catch (IOException e) {
195                    Connection.LOG.warn("Failed to store received message", e);
196                }
197    }
198
199    private void storeToFile(byte[] data, int off, int len, File f)
200            throws IOException {
201        Connection.LOG.info("M-WRITE {}", f);
202        f.getParentFile().mkdirs();
203        FileOutputStream out = new FileOutputStream(f);
204        try {
205            out.write(data, off, len);
206        } finally {
207            out.close();
208        }
209    }
210
211}