/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
*
* This class implements an IP Socket Address (IP address + port number)
* It can also be a pair (hostname + port number), in which case an attempt
* will be made to resolve the hostname. If resolution fails then the address
* is said to be <I>unresolved</I> but can still be used on some circumstances
* like connecting through a proxy.
* <p>
* It provides an immutable object used by sockets for binding, connecting, or
* as returned values.
* <p>
* The <i>wildcard</i> is a special local IP address. It usually means "any"
* and can only be used for <code>bind</code> operations.
*
* @see java.net.Socket
* @see java.net.ServerSocket
* @since 1.4
*/
public class InetSocketAddress
extends SocketAddress
{
// Private implementation class pointed to by all public methods.
private static class InetSocketAddressHolder {
// The hostname of the Socket Address
// The IP address of the Socket Address
// The port number of the Socket Address
private int port;
}
private int getPort() {
return port;
}
return addr;
}
return hostname;
return addr.getHostName();
return null;
}
return hostname;
else
return addr.getHostAddress();
}
return null;
}
private boolean isUnresolved() {
}
if (isUnresolved()) {
} else {
}
}
return false;
boolean sameIP;
else
}
public final int hashCode() {
return port;
}
}
return port;
}
throw new IllegalArgumentException("hostname can't be null");
return hostname;
}
/**
* Creates a socket address where the IP address is the wildcard address
* and the port number a specified value.
* <p>
* A valid port value is between 0 and 65535.
* A port number of <code>zero</code> will let the system pick up an
* ephemeral port in a <code>bind</code> operation.
* <p>
* @param port The port number
* @throws IllegalArgumentException if the port parameter is outside the specified
* range of valid port values.
*/
}
/**
*
* Creates a socket address from an IP address and a port number.
* <p>
* A valid port value is between 0 and 65535.
* A port number of <code>zero</code> will let the system pick up an
* ephemeral port in a <code>bind</code> operation.
* <P>
* A <code>null</code> address will assign the <i>wildcard</i> address.
* <p>
* @param addr The IP address
* @param port The port number
* @throws IllegalArgumentException if the port parameter is outside the specified
* range of valid port values.
*/
holder = new InetSocketAddressHolder(
null,
}
/**
*
* Creates a socket address from a hostname and a port number.
* <p>
* An attempt will be made to resolve the hostname into an InetAddress.
* If that attempt fails, the address will be flagged as <I>unresolved</I>.
* <p>
* If there is a security manager, its <code>checkConnect</code> method
* is called with the host name as its argument to check the permissiom
* to resolve it. This could result in a SecurityException.
* <P>
* A valid port value is between 0 and 65535.
* A port number of <code>zero</code> will let the system pick up an
* ephemeral port in a <code>bind</code> operation.
* <P>
* @param hostname the Host name
* @param port The port number
* @throws IllegalArgumentException if the port parameter is outside the range
* of valid port values, or if the hostname parameter is <TT>null</TT>.
* @throws SecurityException if a security manager is present and
* permission to resolve the host name is
* denied.
* @see #isUnresolved()
*/
try {
} catch(UnknownHostException e) {
}
}
// private constructor for creating unresolved instances
}
/**
*
* Creates an unresolved socket address from a hostname and a port number.
* <p>
* No attempt will be made to resolve the hostname into an InetAddress.
* The address will be flagged as <I>unresolved</I>.
* <p>
* A valid port value is between 0 and 65535.
* A port number of <code>zero</code> will let the system pick up an
* ephemeral port in a <code>bind</code> operation.
* <P>
* @param host the Host name
* @param port The port number
* @throws IllegalArgumentException if the port parameter is outside
* the range of valid port values, or if the hostname
* parameter is <TT>null</TT>.
* @see #isUnresolved()
* @return a <code>InetSocketAddress</code> representing the unresolved
* socket address
* @since 1.5
*/
}
/**
* @serialField hostname String
* @serialField addr InetAddress
* @serialField port int
*/
new ObjectStreamField("port", int.class)};
throws IOException
{
// Don't call defaultWriteObject()
out.writeFields();
}
throws IOException, ClassNotFoundException
{
// Don't call defaultReadObject()
// Check that our invariants are satisfied
throw new InvalidObjectException("hostname and addr " +
"can't both be null");
oisPort);
}
private void readObjectNoData()
throws ObjectStreamException
{
throw new InvalidObjectException("Stream data required");
}
private static final long FIELDS_OFFSET;
static {
try {
} catch (ReflectiveOperationException e) {
throw new Error(e);
}
}
/**
* Gets the port number.
*
* @return the port number.
*/
public final int getPort() {
}
/**
*
* Gets the <code>InetAddress</code>.
*
* @return the InetAdress or <code>null</code> if it is unresolved.
*/
return holder.getAddress();
}
/**
* Gets the <code>hostname</code>.
* Note: This method may trigger a name service reverse lookup if the
* address was created with a literal IP address.
*
* @return the hostname part of the address.
*/
return holder.getHostName();
}
/**
* Returns the hostname, or the String form of the address if it
* doesn't have a hostname (it was created using a literal).
* This has the benefit of <b>not</b> attempting a reverse lookup.
*
* @return the hostname, or String representation of the address.
* @since 1.7
*/
return holder.getHostString();
}
/**
* Checks whether the address has been resolved or not.
*
* @return <code>true</code> if the hostname couldn't be resolved into
* an <code>InetAddress</code>.
*/
public final boolean isUnresolved() {
return holder.isUnresolved();
}
/**
* Constructs a string representation of this InetSocketAddress.
* This String is constructed by calling toString() on the InetAddress
* and concatenating the port number (with a colon). If the address
* is unresolved then the part before the colon will only contain the hostname.
*
* @return a string representation of this object.
*/
}
/**
* Compares this object against the specified object.
* The result is <code>true</code> if and only if the argument is
* not <code>null</code> and it represents the same address as
* this object.
* <p>
* Two instances of <code>InetSocketAddress</code> represent the same
* address if both the InetAddresses (or hostnames if it is unresolved) and port
* numbers are equal.
* If both addresses are unresolved, then the hostname & the port number
* are compared.
*
* Note: Hostnames are case insensitive. e.g. "FooBar" and "foobar" are
* considered equal.
*
* @param obj the object to compare against.
* @return <code>true</code> if the objects are the same;
* <code>false</code> otherwise.
* @see java.net.InetAddress#equals(java.lang.Object)
*/
return false;
}
/**
* Returns a hashcode for this socket address.
*
* @return a hash code value for this socket address.
*/
public final int hashCode() {
}
}