org.jgroups.stack.IpAddress Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
package org.jgroups.stack;
import org.jgroups.Address;
import org.jgroups.Global;
import org.jgroups.PhysicalAddress;
import org.jgroups.util.Util;
import java.io.*;
import java.net.*;
/**
* Network-dependent address (Internet). Generated by the bottommost layer of the protocol
* stack (UDP). Contains an InetAddress and port.
* @author Bela Ban
*/
public class IpAddress implements PhysicalAddress {
private static final long serialVersionUID=-1818672332115113291L;
private InetAddress ip_addr;
private int port;
static boolean resolve_dns;
static {
/* Trying to get value of resolve_dns. PropertyPermission not granted if
* running in an untrusted environment with JNLP */
try {
String tmp=Util.getProperty(new String[]{Global.RESOLVE_DNS, "resolve.dns"}, null, null, "false");
resolve_dns=Boolean.valueOf(tmp);
}
catch (SecurityException ex){
resolve_dns=false;
}
}
// Used only by Externalization
public IpAddress() {
}
/** e.g. 192.168.1.5:7800 */
public IpAddress(String addr_port) throws Exception {
int index=addr_port.lastIndexOf(':');
if(index == -1)
ip_addr=InetAddress.getByName(addr_port);
else {
ip_addr=InetAddress.getByName(addr_port.substring(0, index));
port=Integer.valueOf(addr_port.substring(index+1));
}
}
public IpAddress(String i, int p) throws UnknownHostException {
port=p;
ip_addr=InetAddress.getByName(i);
}
public IpAddress(InetAddress i, int p) {
ip_addr=i; port=p;
if(this.ip_addr == null)
setAddressToLocalHost();
}
private void setAddressToLocalHost() {
try {
ip_addr=InetAddress.getLocalHost(); // get first NIC found (on multi-homed systems)
}
catch(Exception e) {
ip_addr=null;
}
if(ip_addr == null) {
try {
ip_addr=InetAddress.getByName(null);
}
catch(UnknownHostException e) {
}
}
}
public IpAddress(int port) {
this(port, true);
}
public IpAddress(int port, boolean set_default_host) {
this.port=port;
if(set_default_host)
setAddressToLocalHost();
}
public IpAddress(InetSocketAddress sock_addr) {
port=sock_addr.getPort();
ip_addr=sock_addr.getAddress();
}
public final InetAddress getIpAddress() {return ip_addr;}
public final int getPort() {return port;}
/**
* implements the java.lang.Comparable interface
* @see java.lang.Comparable
* @param o - the Object to be compared
* @return a negative integer, zero, or a positive integer as this object is less than,
* equal to, or greater than the specified object.
* @exception java.lang.ClassCastException - if the specified object's type prevents it
* from being compared to this Object.
*/
public final int compareTo(Address o) {
int h1, h2, rc; // added Nov 7 2005, makes sense with canonical addresses
if(this == o) return 0;
if(!(o instanceof IpAddress))
throw new ClassCastException("comparison between different classes: the other object is " +
(o != null? o.getClass() : o));
IpAddress other = (IpAddress) o;
if(ip_addr == null)
if (other.ip_addr == null) return port < other.port ? -1 : (port > other.port ? 1 : 0);
else return -1;
h1=ip_addr.hashCode();
h2=other.ip_addr.hashCode();
rc=h1 < h2? -1 : h1 > h2? 1 : 0;
return rc != 0 ? rc : port < other.port ? -1 : (port > other.port ? 1 : 0);
}
public final boolean equals(Object obj) {
if(this == obj) return true; // added Nov 7 2005, makes sense with canonical addresses
if(!(obj instanceof IpAddress))
return false;
IpAddress other=(IpAddress)obj;
boolean sameIP;
if(this.ip_addr != null)
sameIP=this.ip_addr.equals(other.ip_addr);
else
sameIP=(other.ip_addr == null);
return sameIP && (this.port == other.port);
}
public final int hashCode() {
return ip_addr != null ? ip_addr.hashCode() + port : port;
}
public String toString() {
StringBuilder sb=new StringBuilder();
if(ip_addr == null)
sb.append("");
else {
if(ip_addr.isMulticastAddress())
sb.append(ip_addr.getHostAddress());
else {
String host_name;
if(resolve_dns) {
host_name=ip_addr.getHostName();
}
else {
host_name=ip_addr.getHostAddress();
}
sb.append(host_name);
}
}
sb.append(":").append(port);
return sb.toString();
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
try {
readFrom(in);
}
catch(Exception e) {
throw new IOException(e);
}
}
public void writeExternal(ObjectOutput out) throws IOException {
try {
writeTo(out);
}
catch(Exception e) {
throw new IOException(e);
}
}
public void writeTo(DataOutput out) throws Exception {
if(ip_addr != null) {
byte[] address=ip_addr.getAddress(); // 4 bytes (IPv4) or 16 bytes (IPv6)
out.writeByte(address.length); // 1 byte
out.write(address, 0, address.length);
if(ip_addr instanceof Inet6Address)
out.writeInt(((Inet6Address)ip_addr).getScopeId());
}
else {
out.writeByte(0);
}
out.writeShort(port);
}
public void readFrom(DataInput in) throws Exception {
int len=in.readByte();
if(len > 0 && (len != Global.IPV4_SIZE && len != Global.IPV6_SIZE))
throw new IOException("length has to be " + Global.IPV4_SIZE + " or " + Global.IPV6_SIZE + " bytes (was " +
len + " bytes)");
byte[] a = new byte[len]; // 4 bytes (IPv4) or 16 bytes (IPv6)
in.readFully(a);
if(len == Global.IPV6_SIZE) {
int scope_id=in.readInt();
this.ip_addr=Inet6Address.getByAddress(null, a, scope_id);
}
else {
this.ip_addr=InetAddress.getByAddress(a);
}
// changed from readShort(): we need the full 65535, with a short we'd only get up to 32K !
port=in.readUnsignedShort();
}
public int size() {
// length (1 bytes) + 4 bytes for port
int tmp_size=Global.BYTE_SIZE+ Global.SHORT_SIZE;
if(ip_addr != null) {
// 4 bytes for IPv4, 20 for IPv6 (16 + 4 for scope-id)
tmp_size+=(ip_addr instanceof Inet4Address)? 4 : 20;
}
return tmp_size;
}
public IpAddress copy() {
return new IpAddress(ip_addr, port);
}
}