/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.test.integration.logging.syslogserver;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.List;
import java.util.Set;
import org.apache.commons.io.IOUtils;
import org.jboss.logging.Logger;
import org.productivity.java.syslog4j.server.SyslogServerEventHandlerIF;
import org.productivity.java.syslog4j.server.SyslogServerEventIF;
import org.productivity.java.syslog4j.server.SyslogServerIF;
/**
* Socket handler for TCP and TLS syslog server implementations. It handles automatically Octet Counting/Non-Transparent-Framing
* switch.
*
* @author Josef Cacek
*/
public class TCPSyslogSocketHandler implements Runnable {
private static final Logger LOGGER = Logger.getLogger(TCPSyslogSocketHandler.class);
protected SyslogServerIF server = null;
protected Socket socket = null;
protected Set<Socket> sockets = null;
/**
* Constructor.
*
* @param sockets Set of all registered handlers.
* @param server Syslog server instance
* @param socket socket returned from the serverSocket.accept()
*/
public TCPSyslogSocketHandler(Set<Socket> sockets, SyslogServerIF server, Socket socket) {
this.sockets = sockets;
this.server = server;
this.socket = socket;
synchronized (this.sockets) {
this.sockets.add(this.socket);
}
}
public void run() {
try {
final BufferedInputStream bis = new BufferedInputStream(socket.getInputStream());
int b = -1;
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
boolean firstByte = true;
boolean octetCounting = false;
StringBuilder octetLenStr = new StringBuilder();
do {
b = bis.read();
if (firstByte && b >= '1' && b <= '9') {
// handle Octet Counting messages (cf. rfc-6587)
octetCounting = true;
}
firstByte = false;
if (octetCounting) {
if (b != ' ') {
octetLenStr.append((char) b);
} else {
int len = Integer.parseInt(octetLenStr.toString());
handleSyslogMessage(IOUtils.toByteArray(bis, len));
// reset the stuff
octetLenStr = new StringBuilder();
firstByte = true;
octetCounting = false;
}
} else {
// handle Non-Transparent-Framing messages (cf. rfc-6587)
switch (b) {
case -1:
case '\r':
case '\n':
if (baos.size() > 0) {
handleSyslogMessage(baos.toByteArray());
baos.reset();
firstByte = true;
}
break;
default:
baos.write(b);
break;
}
}
} while (b != -1);
} catch (IOException e) {
LOGGER.warn("IOException occurred", e);
} finally {
IOUtils.closeQuietly(socket);
sockets.remove(socket);
}
}
/**
* Parses {@link Rfc5424SyslogEvent} instance from given raw message bytes and sends it to event handlers.
*
* @param rawMsg
*/
private void handleSyslogMessage(final byte[] rawMsg) {
final SyslogServerEventIF event = new Rfc5424SyslogEvent(rawMsg, 0, rawMsg.length);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Firing Syslog event: " + event);
}
final List eventHandlers = this.server.getConfig().getEventHandlers();
for (int i = 0; i < eventHandlers.size(); i++) {
final SyslogServerEventHandlerIF eventHandler = (SyslogServerEventHandlerIF) eventHandlers.get(i);
eventHandler.event(this.server, event);
}
}
}