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/*
Calimero 2 - A library for KNX network access
Copyright (c) 2006, 2016 B. Malinowsky
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under terms
of your choice, provided that you also meet, for each linked independent
module, the terms and conditions of the license of that module. An
independent module is a module which is not derived from or based on
this library. If you modify this library, you may extend this exception
to your version of the library, but you are not obligated to do so. If
you do not wish to do so, delete this exception statement from your
version.
*/
package tuwien.auto.calimero.tools;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import tuwien.auto.calimero.IndividualAddress;
import tuwien.auto.calimero.Settings;
import tuwien.auto.calimero.exception.KNXException;
import tuwien.auto.calimero.exception.KNXFormatException;
import tuwien.auto.calimero.exception.KNXIllegalArgumentException;
import tuwien.auto.calimero.exception.KNXRemoteException;
import tuwien.auto.calimero.knxnetip.KNXnetIPConnection;
import tuwien.auto.calimero.link.KNXNetworkLink;
import tuwien.auto.calimero.link.KNXNetworkLinkFT12;
import tuwien.auto.calimero.link.KNXNetworkLinkIP;
import tuwien.auto.calimero.link.KNXNetworkLinkTpuart;
import tuwien.auto.calimero.link.medium.KNXMediumSettings;
import tuwien.auto.calimero.link.medium.PLSettings;
import tuwien.auto.calimero.link.medium.RFSettings;
import tuwien.auto.calimero.link.medium.TPSettings;
import tuwien.auto.calimero.log.LogLevel;
import tuwien.auto.calimero.log.LogManager;
import tuwien.auto.calimero.log.LogService;
import tuwien.auto.calimero.log.LogStreamWriter;
import tuwien.auto.calimero.log.LogWriter;
import tuwien.auto.calimero.mgmt.Description;
import tuwien.auto.calimero.mgmt.LocalDeviceMgmtAdapter;
import tuwien.auto.calimero.mgmt.PropertyAccess;
import tuwien.auto.calimero.mgmt.PropertyAdapter;
import tuwien.auto.calimero.mgmt.PropertyClient;
import tuwien.auto.calimero.mgmt.RemotePropertyServiceAdapter;
/**
* A tool for Calimero to read/set the IP configuration of a KNXnet/IP server using KNX properties.
*
* IPConfig is a {@link Runnable} tool implementation for reading and writing the IP configuration
* in the KNXnet/IP Parameter Object. It supports network access using a KNXnet/IP, KNX IP, FT1.2,
* or TP-UART connection. IPConfig shows the necessary interaction with the core library API for
* this particular task.
* To run IPConfig, invoke {@link IPConfig#main(String[])}, or create a new instance using
* {@link IPConfig#IPConfig(String[])} and invoke {@link #run()} on that instance.
* All configuration output, as well as occurring problems are written to either
* System.out (console mode), or the log writer supplied by the user. See the tool
* options for a list of communication settings.
*
* The main part of this tool interacts with the Calimero 2 {@link PropertyClient} interface, which
* offers high level access to KNX property information. It shows creation of the
* {@link PropertyAdapter}, necessary for a property client to work.
*
* @author B. Malinowsky
*/
public class IPConfig implements Runnable
{
private static final String tool = "IPConfig";
private static final String sep = System.getProperty("line.separator");
private static final int IPObjType = 11;
private static LogService out = LogManager.getManager().getLogService("tools");
private KNXNetworkLink lnk;
private PropertyClient pc;
private int objIndex = -1;
private final Map options = new HashMap();
/**
* Creates a new IPConfig instance using the supplied options.
*
* See {@link #main(String[])} for a list of options.
*
* @param args list with options
*/
protected IPConfig(final String[] args)
{
try {
// read in the command line options
parseOptions(args);
}
catch (final KNXIllegalArgumentException e) {
throw e;
}
catch (final NoSuchElementException e) {
// create our own message since e usually comes with no error message at all
throw new KNXIllegalArgumentException("no more options in argument list", e);
}
catch (final RuntimeException e) {
throw new KNXIllegalArgumentException(e.getMessage(), e);
}
}
/**
* Entry point for running IPConfig.
*
* An IP host or port identifier has to be supplied to specify the endpoint for the KNX network
* access.
* To show the usage message of this tool on the console, supply the command line option -help
* (or -h).
* Command line options are treated case sensitive. Available options:
*
* -help -h show help message-version show tool/library version and exit-local -l local device management (default)-remote -r KNX addr remote property service-localhost id local IP/host name-localport number local UDP port (default system assigned)-port -p number UDP port on host (default 3671)-nat -n enable Network Address Translation-serial -s use FT1.2 serial communication-tpuart use TP-UART communication
* For remote property service these options are available:
*
* -routing use KNXnet/IP routing-medium -m id KNX medium [tp1|p110|rf] (defaults to
* tp1)-knx-address -k KNX address KNX device address of local
* endpoint-connect -c connection oriented mode-authorize -a key authorize key to access KNX device
*
* In any case, the tool reads out the IP configuration of the connected endpoint and writes it
* to standard output.
* Supply one or more of the following commands to change the IP configuration:
*
* ip address set the configured fixed IP addresssubnet address set the configured IP subnet maskgateway address set the configured IP address of the default
* gatewaymulticast address set the routing multicast addressmanual set manual IP assignment for the current IP address to enabledbootp set Bootstrap Protocol IP assignment for the current IP address to
* enableddhcp set DHCP IP assignment for the current IP address to enabledauto set automatic IP assignment for the current IP address to enabled
* The -knx-address option is only necessary if an access protocol is selected
* that directly communicates with the KNX network, i.e., KNX IP or TP-UART. The selected KNX
* individual address shall be unique in a network, and the subnetwork address (area and line)
* should be set to match the network configuration.
*
* @param args command line options to run the tool
*/
public static void main(final String[] args)
{
final LogWriter w = LogStreamWriter.newUnformatted(LogLevel.ALL, System.out, true, false);
out.addWriter(w);
try {
new IPConfig(args).run();
}
catch (final Throwable t) {
out.error("IP config", t);
}
LogManager.getManager().shutdown(true);
}
/* (non-Javadoc)
* @see java.lang.Runnable#run()
*/
public void run()
{
Exception thrown = null;
boolean canceled = false;
try {
if (options.isEmpty()) {
out.log(LogLevel.ALWAYS, tool + " - KNXnet/IP address configuration", null);
showVersion();
out.log(LogLevel.ALWAYS, "Type -help for help message", null);
return;
}
if (options.containsKey("help")) {
showUsage();
return;
}
if (options.containsKey("version")) {
showVersion();
return;
}
// create the property adapter based on user options
final PropertyAdapter adapter = createAdapter();
// hand our adapter to a new property client
pc = new PropertyClient(adapter);
// ??? we should add our log writer to property client logger
// LogManager.getManager().addWriter("PC " + adapter.getName(), w);
// get object type with KNXnet/IP parameters
final List l = pc.scanProperties(false);
for (final Iterator i = l.iterator(); i.hasNext();) {
final Description d = (Description) i.next();
if (d.getObjectType() == IPObjType) {
objIndex = d.getObjectIndex();
break;
}
}
if (objIndex == -1) {
out.error(PropertyClient.getObjectTypeName(IPObjType) + " not found");
return;
}
setIPAssignment();
setIP(PropertyAccess.PID.IP_ADDRESS, "IP");
setIP(PropertyAccess.PID.SUBNET_MASK, "subnet");
setIP(PropertyAccess.PID.DEFAULT_GATEWAY, "gateway");
setIP(PropertyAccess.PID.ROUTING_MULTICAST_ADDRESS, "multicast");
readConfig();
}
catch (final KNXException e) {
thrown = e;
}
catch (final InterruptedException e) {
canceled = true;
Thread.currentThread().interrupt();
}
finally {
if (pc != null)
pc.close();
if (lnk != null)
lnk.close();
onCompletion(thrown, canceled);
}
}
/**
* Supplies information about a received IP configuration.
*
* This default implementation writes information to standard output.
*
* @param config a list with configuration entries, an entry is of type String[3], with [0]
* being the property identifier (PID), [1] being a short descriptive name of the
* configuration property, [2] being the value
*/
protected void onConfigurationReceived(final List config)
{
final StringBuffer sb = new StringBuffer();
sb.append("KNXnet/IP server ").append(((String[]) config.get(0))[2]).append(" ")
.append(((String[]) config.get(1))[2]).append(sep);
final String padding = " ";
for (int i = 2; i < config.size(); ++i) {
final String[] s = (String[]) config.get(i);
sb.append(s[1]).append(padding.substring(s[1].length()) + s[2]).append(sep);
}
out.log(LogLevel.ALWAYS, sb.toString(), null);
}
/**
* Called by this tool on completion.
*
*
* @param thrown the thrown exception if operation completed due to an raised exception,
* null otherwise
* @param canceled whether the operation got canceled before its planned end
*/
protected void onCompletion(final Exception thrown, final boolean canceled)
{
if (canceled)
out.info("configuration canceled");
if (thrown != null)
out.error("completed", thrown);
}
private void setIPAssignment() throws KNXException
{
int assignment = 0;
if (options.containsKey("manual"))
assignment |= 0x01;
if (options.containsKey("bootp"))
assignment |= 0x02;
if (options.containsKey("dhcp"))
assignment |= 0x04;
if (options.containsKey("auto"))
assignment |= 0x08;
if (assignment != 0)
pc.setProperty(objIndex, PropertyAccess.PID.IP_ASSIGNMENT_METHOD, 1, 1,
new byte[] { (byte) assignment });
}
private void setIP(final int pid, final String key)
{
if (options.containsKey(key))
try {
pc.setProperty(objIndex, pid, 1, 1, ((InetAddress) options.get(key)).getAddress());
}
catch (final KNXException e) {
out.error("setting " + key + " failed, " + e.getMessage());
}
}
private void readConfig() throws KNXException
{
final List config = new ArrayList();
int pid = PropertyAccess.PID.KNX_INDIVIDUAL_ADDRESS;
byte[] data = query(pid);
if (data != null)
add(config, pid, "KNXnet/IP server", new IndividualAddress(data).toString());
add(config, PropertyAccess.PID.FRIENDLY_NAME, "name", queryFriendlyName());
pid = PropertyAccess.PID.IP_CAPABILITIES;
data = query(pid);
if (data != null)
add(config, pid, "Supported IP assignment methods",
getIPAssignment(new byte[] { (byte) (data[0] << 1 | 0x01) }));
pid = PropertyAccess.PID.IP_ASSIGNMENT_METHOD;
data = query(pid);
if (data != null)
add(config, pid, "Enabled IP assignment methods", getIPAssignment(data));
pid = PropertyAccess.PID.CURRENT_IP_ASSIGNMENT_METHOD;
data = query(pid);
if (data != null)
add(config, pid, "Current IP assignment method", getIPAssignment(data));
pid = PropertyAccess.PID.KNXNETIP_ROUTING_CAPABILITIES;
data = query(pid);
if (data != null)
add(config, pid, "Routing capabilities", getRoutingCaps(data));
addIP(config, PropertyAccess.PID.IP_ADDRESS, "Configured IP address");
addIP(config, PropertyAccess.PID.SUBNET_MASK, "Configured subnet mask");
addIP(config, PropertyAccess.PID.CURRENT_IP_ADDRESS, "Current IP address");
addIP(config, PropertyAccess.PID.CURRENT_SUBNET_MASK, "Current subnet mask");
addIP(config, PropertyAccess.PID.DEFAULT_GATEWAY, "Configured default gateway");
addIP(config, PropertyAccess.PID.CURRENT_DEFAULT_GATEWAY, "Current default gateway");
addIP(config, PropertyAccess.PID.DHCP_BOOTP_SERVER, "DHCP/BootP server");
addIP(config, PropertyAccess.PID.ROUTING_MULTICAST_ADDRESS, "Routing multicast");
onConfigurationReceived(config);
}
private void addIP(final List config, final int pid, final String name)
{
add(config, pid, name, queryIP(pid));
}
private void add(final List config, final int pid, final String name, final String value)
{
config.add(new String[] { Integer.toString(pid), name, value });
}
private String queryFriendlyName() throws KNXException
{
final char[] name = new char[30];
int start = 0;
while (true) {
final byte[] data = pc.getProperty(objIndex, PropertyAccess.PID.FRIENDLY_NAME,
start + 1, 10);
for (int i = 0; i < 10 && data[i] != 0; ++i, ++start)
name[start] = (char) (data[i] & 0xff);
if (start >= 30 || data[9] == 0)
return new String(name, 0, start);
}
}
private byte[] query(final int pid) throws KNXException
{
try {
return pc.getProperty(objIndex, pid, 1, 1);
}
catch (final KNXRemoteException e) {
out.error("getting property with ID " + pid + " failed", e);
return null;
}
}
private String queryIP(final int pid)
{
try {
final byte[] data = query(pid);
return data == null ? "PID not found" : InetAddress.getByAddress(data).getHostAddress();
}
catch (final UnknownHostException e) {}
catch (final KNXException e) {}
return "-";
}
private static String getIPAssignment(final byte[] value)
{
final int bitset = value[0] & 0xff;
String s = "";
final String div = ", ";
if ((bitset & 0x01) != 0)
s = "manual";
if ((bitset & 0x02) != 0)
s += (s.length() == 0 ? "" : div) + "Bootstrap Protocol";
if ((bitset & 0x04) != 0)
s += (s.length() == 0 ? "" : div) + "DHCP";
if ((bitset & 0x08) != 0)
s += (s.length() == 0 ? "" : div) + "Auto IP";
return s;
}
private static String getRoutingCaps(final byte[] value)
{
final int bitset = value[0] & 0xff;
String caps = "";
if ((bitset & 0x01) != 0)
caps += "queue overflow statistics, ";
if ((bitset & 0x02) != 0)
caps += "transmitted telegrams statistics, ";
if ((bitset & 0x04) != 0)
caps += "priority/FIFO, ";
if ((bitset & 0x08) != 0)
caps += "multiple KNX installations, ";
if ((bitset & 0x10) != 0)
caps += "group address mapping";
return caps;
}
/**
* Creates the property adapter to be used, depending on the supplied user options.
*
* There are two types of property adapters. One uses KNXnet/IP local device management to
* access KNX properties in an interface object, the other type uses remote property services.
* The remote adapter needs a KNX network link to access the KNX network, the link is also
* created by this method if this adapter type is requested.
*
* @return the created adapter
* @throws KNXException on adapter creation problem
* @throws InterruptedException on interrupted thread
*/
private PropertyAdapter createAdapter() throws KNXException, InterruptedException
{
// create local and remote socket address for use in adapter
final InetSocketAddress local = createLocalSocket(
(InetAddress) options.get("localhost"), (Integer) options.get("localport"));
// decide what type of adapter to create
if (options.containsKey("localDM")) {
final InetSocketAddress host = new InetSocketAddress((String) options.get("host"),
((Integer) options.get("port")).intValue());
return createLocalDMAdapter(local, host);
}
return createRemoteAdapter(local);
}
/**
* Creates a local device management adapter.
*
*
* @param local local socket address
* @param host remote socket address of host
* @return local DM adapter
* @throws KNXException on adapter creation problem
* @throws InterruptedException on interrupted thread
*/
private PropertyAdapter createLocalDMAdapter(final InetSocketAddress local,
final InetSocketAddress host) throws KNXException, InterruptedException
{
return new LocalDeviceMgmtAdapter(local, host, options.containsKey("nat"), null, false);
}
/**
* Creates a remote property service adapter for one device in the KNX network.
* The adapter uses a KNX network link for access, which is also created by this method.
*
* @param local local socket address
* @return remote property service adapter
* @throws KNXException on adapter creation problem
* @throws InterruptedException on interrupted thread
*/
private PropertyAdapter createRemoteAdapter(final InetSocketAddress local)
throws KNXException, InterruptedException
{
final String host = (String) options.get("host");
final KNXMediumSettings medium = (KNXMediumSettings) options.get("medium");
if (options.containsKey("serial")) {
// create FT1.2 network link
try {
lnk = new KNXNetworkLinkFT12(Integer.parseInt(host), medium);
}
catch (final NumberFormatException e) {
lnk = new KNXNetworkLinkFT12(host, medium);
}
}
else if (options.containsKey("tpuart")) {
// create TP-UART link
final IndividualAddress device = (IndividualAddress) options.get("knx-address");
medium.setDeviceAddress(device);
lnk = new KNXNetworkLinkTpuart(host, medium, Collections.emptyList());
}
else {
final int mode = options.containsKey("routing") ? KNXNetworkLinkIP.ROUTING
: KNXNetworkLinkIP.TUNNELING;
final InetSocketAddress remote = new InetSocketAddress(host,
((Integer) options.get("port")).intValue());
lnk = new KNXNetworkLinkIP(mode, local, remote, options.containsKey("nat"), medium);
}
final IndividualAddress remote = (IndividualAddress) options.get("remote");
// if an authorization key was supplied, the adapter uses
// connection oriented mode and tries to authenticate
final byte[] authKey = (byte[]) options.get("authorize");
if (authKey != null)
return new RemotePropertyServiceAdapter(lnk, remote, null, authKey);
return new RemotePropertyServiceAdapter(lnk, remote, null, options.containsKey("connect"));
}
private void parseOptions(final String[] args)
{
// remove empty arguments
final List l = new ArrayList(Arrays.asList(args));
l.removeAll(Arrays.asList(new String[] { "" }));
if (l.size() == 0)
return;
// add defaults
options.put("port", new Integer(KNXnetIPConnection.DEFAULT_PORT));
options.put("medium", TPSettings.TP1);
// default subnetwork address for TP1 and unregistered device
options.put("knx-address", new IndividualAddress(0, 0x02, 0xff));
for (final Iterator i = l.iterator(); i.hasNext();) {
final String arg = (String) i.next();
if (isOption(arg, "-help", "-h")) {
options.put("help", null);
return;
}
if (isOption(arg, "-version", null)) {
options.put("version", null);
return;
}
if (isOption(arg, "-local", "-l"))
options.put("localDM", null);
else if (isOption(arg, "-remote", "-r"))
try {
options.put("remote", new IndividualAddress((String) i.next()));
}
catch (final KNXFormatException e) {
throw new KNXIllegalArgumentException(e.getMessage(), e);
}
else if (isOption(arg, "-localhost", null))
parseIP((String) i.next(), "localhost", options);
else if (isOption(arg, "-localport", null))
options.put("localport", Integer.decode((String) i.next()));
else if (isOption(arg, "-port", "-p"))
options.put("port", Integer.decode((String) i.next()));
else if (isOption(arg, "-nat", "-n"))
options.put("nat", null);
else if (isOption(arg, "-serial", "-s"))
options.put("serial", null);
else if (isOption(arg, "-tpuart", null))
options.put("tpuart", null);
else if (isOption(arg, "-medium", "-m"))
options.put("medium", getMedium((String) i.next()));
else if (isOption(arg, "-knx-address", "-k"))
options.put("knx-address", Main.getAddress((String) i.next()));
else if (isOption(arg, "-connect", "-c"))
options.put("connect", null);
else if (isOption(arg, "-authorize", "-a"))
options.put("authorize", getAuthorizeKey((String) i.next()));
else if (isOption(arg, "-routing", null))
options.put("routing", null);
// IP configuration options
else if (arg.equalsIgnoreCase("manual"))
options.put("manual", null);
else if (arg.equalsIgnoreCase("bootp"))
options.put("bootp", null);
else if (arg.equalsIgnoreCase("dhcp"))
options.put("dhcp", null);
else if (arg.equalsIgnoreCase("auto"))
options.put("auto", null);
else if (arg.equalsIgnoreCase("ip"))
parseIP((String) i.next(), "ip", options);
else if (arg.equalsIgnoreCase("subnet"))
parseIP((String) i.next(), "subnet", options);
else if (arg.equalsIgnoreCase("gateway"))
parseIP((String) i.next(), "gateway", options);
else if (arg.equalsIgnoreCase("multicast"))
parseIP((String) i.next(), "multicast", options);
else if (!options.containsKey("host"))
options.put("host", arg);
else
throw new KNXIllegalArgumentException("unknown option \"" + arg + "\"");
}
if (!options.containsKey("remote"))
options.put("localDM", null);
if (!options.containsKey("localDM") && !options.containsKey("remote"))
throw new KNXIllegalArgumentException("no connection category specified");
if (!options.containsKey("host") && !options.containsKey("serial"))
throw new KNXIllegalArgumentException("no host or serial port specified");
if (options.containsKey("serial") && !options.containsKey("remote"))
throw new KNXIllegalArgumentException("-remote option is mandatory with -serial");
}
private static void showUsage()
{
final StringBuffer sb = new StringBuffer();
sb.append("Usage: ").append(tool).append(" [options] ").append(sep);
sb.append("Options:").append(sep);
sb.append(" -help -h show this help message and exit").append(sep);
sb.append(" -version show tool/library version and exit").append(sep);
sb.append(" -local -l local device management (default)").append(sep);
sb.append(" -remote -r remote property service").append(sep);
sb.append(" -localhost local IP/host name").append(sep);
sb.append(" -localport local UDP port (default system assigned)").append(sep);
sb.append(" -port -p UDP port on (default ")
.append(KNXnetIPConnection.DEFAULT_PORT).append(")").append(sep);
sb.append(" -nat -n enable Network Address Translation").append(sep);
sb.append("Options for remote property service only:").append(sep);
sb.append(" -serial -s use FT1.2 serial communication").append(sep);
sb.append(" -tpuart use TP-UART communication").append(sep);
sb.append(" -routing use KNXnet/IP routing (always on port 3671)")
.append(sep);
sb.append(" -medium -m KNX medium [tp1|p110|rf] (default tp1)")
.append(sep);
sb.append(" -connect -c connection oriented mode").append(sep);
sb.append(" -authorize -a authorize key to access KNX device").append(sep);
sb.append("To change the IP configuration, supply one or more commands:").append(sep);
sb.append(" ip set the configured fixed IP address").append(sep);
sb.append(" subnet set the configured IP subnet mask").append(sep);
sb.append(
" gateway set the configured IP address of the "
+ "default gateway").append(sep);
sb.append(" multicast set the routing multicast address").append(sep);
sb.append(" manual enable manual IP assignment for current IP address")
.append(sep);
sb.append(
" bootp enable Bootstrap Protocol IP assignment for current "
+ "IP address").append(sep);
sb.append(" dhcp enable DHCP IP assignment for current IP address").append(sep);
sb.append(" auto enable automatic IP assignment for current IP address")
.append(sep);
out.log(LogLevel.ALWAYS, sb.toString(), null);
}
private static void showVersion()
{
out.log(LogLevel.ALWAYS, Settings.getLibraryHeader(false), null);
}
private static KNXMediumSettings getMedium(final String id)
{
// for now, the local device address is always left 0 in the
// created medium setting, since there is no user cmd line option for this
// so KNXnet/IP server will supply address
if (id.equals("tp1"))
return TPSettings.TP1;
else if (id.equals("p110"))
return new PLSettings();
else if (id.equals("rf"))
return new RFSettings(null);
else
throw new KNXIllegalArgumentException("unknown medium");
}
private static byte[] getAuthorizeKey(final String key)
{
final long value = Long.decode(key).longValue();
if (value < 0 || value > 0xFFFFFFFFL)
throw new KNXIllegalArgumentException("invalid authorize key");
return new byte[] { (byte) (value >> 24), (byte) (value >> 16), (byte) (value >> 8),
(byte) value };
}
private static void parseIP(final String address, final String key, final Map options)
{
try {
options.put(key, InetAddress.getByName(address));
}
catch (final UnknownHostException e) {
throw new KNXIllegalArgumentException("failed to read IP " + address, e);
}
}
private static InetSocketAddress createLocalSocket(final InetAddress host, final Integer port)
{
final int p = port != null ? port.intValue() : 0;
try {
return host != null ? new InetSocketAddress(host, p) : p != 0 ? new InetSocketAddress(
InetAddress.getLocalHost(), p) : null;
}
catch (final UnknownHostException e) {
throw new KNXIllegalArgumentException("failed to get local host " + e.getMessage(), e);
}
}
private static boolean isOption(final String arg, final String longOpt, final String shortOpt)
{
return arg.equals(longOpt) || shortOpt != null && arg.equals(shortOpt);
}
}