/*
* %W% %E%
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package com.sun.cdc.io.j2me.serversocket;
import java.io.*;
import java.net.*;
import javax.microedition.io.*;
import com.sun.cdc.io.j2me.*;
import com.sun.cdc.io.*;
/**
* StreamConnectionNotifier to the Palm Server Socket API.
*
* @author Nik Shaylor
* @version 1.0 10/08/99
*/
public class Protocol extends ConnectionBase
implements StreamConnectionNotifier, ServerSocketConnection {
/** Server Socket object */
ServerSocket ssocket;
/*
* Check for listen permission on the given port. A SecurityException
* will be thrown if the permission is not available. The MIDP
* protocol handler should override this method to implement the
* proper MIDP security check.
*/
protected void checkPermission(int port) {
// Check for SecurityManager.checkListen()
java.lang.SecurityManager sm = System.getSecurityManager();
if (sm != null){
sm.checkListen(port);
}
return;
}
/**
* Open the connection
* @param name the target for the connection
* @param writeable a flag that is true if the caller expects to write to the
* connection.
* @param timeouts A flag to indicate that the called wants timeout exceptions
* <p>
* The name string for this protocol should be:
* "<port number>
*/
public void open(String name, int mode, boolean timeouts) throws IOException {
//if(name.charAt(0) != '/' || name.charAt(1) != '/' || name.charAt(2) != ':') {
if(name.charAt(0) != '/' || name.charAt(1) != '/') {
throw new IllegalArgumentException("Protocol must start with \"//\" "+name);
}
/* socket:// case. System assigned incoming port */
if (name.length() == 2) {
open();
return;
}
if(name.charAt(2) != ':') {
throw new IllegalArgumentException("Protocol must start with \"//:\" "+name);
}
name = name.substring(3);
/* socket://: case. System assigned incoming port */
if (name.length() == 0) {
checkPermission(0);
open();
return;
}
try {
final int port;
/* Get the port number */
port = Integer.parseInt(name);
checkPermission(port);
/* Open the socket: inbound server. Use a doPrivileged
* block to avoid excessive prompting.
*/
ssocket =
(ServerSocket)java.security.AccessController.doPrivileged(
new java.security.PrivilegedExceptionAction() {
public Object run()
throws java.security.PrivilegedActionException,
IOException {
return new ServerSocket(port);
}
});
} catch(NumberFormatException x) {
throw new IllegalArgumentException("Invalid port number in "+name);
} catch(java.security.PrivilegedActionException pae) {
IOException ioe = (IOException)pae.getException();
throw ioe;
}
}
/**
* Open the connection to an arbitrary system selected port and address
*/
public void open() throws IOException {
ssocket = new ServerSocket();
/* binding to null to get the system assigned port */
ssocket.bind(null);
}
/**
* Returns a GenericConnection that represents a server side
* socket connection
* @return a socket to communicate with a client.
* @exception IOException if an I/O error occurs when creating the
* input stream.
*/
public StreamConnection acceptAndOpen() throws IOException {
Socket soc = ssocket.accept();
com.sun.cdc.io.j2me.socket.Protocol con =
new com.sun.cdc.io.j2me.socket.Protocol();
con.open(soc);
return con;
}
/**
* Close the connection.
*
* @exception IOException if an I/O error occurs when closing the
* connection.
*/
public void close() throws IOException {
ssocket.close();
}
/**
* Gets the local address to which the socket is bound.
*
* <P>The host address(IP number) that can be used to connect to this
* end of the socket connection from an external system.
* Since IP addresses may be dynamically assigned, a remote application
* will need to be robust in the face of IP number reassignment.</P>
* <P> The local hostname (if available) can be accessed from
* <code> System.getProperty("microedition.hostname")</code>
* </P>
*
* @return the local address to which the socket is bound.
* @exception IOException if the connection was closed
* @see SocketConnection
*/
public String getLocalAddress() throws IOException {
if (ssocket.isClosed())
throw new IOException("ServerSocketConnection is closed");
/*
* getLocalAddress calls SecurityManager.checkConnect,
* so a privileged block is used to avoid excessive security prompting.
*/
InetAddress addr =
(InetAddress)java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public Object run() {
try {
return InetAddress.getLocalHost();
} catch (java.net.UnknownHostException uhe) {
return null;
}
}
});
if (addr == null)
return null;
else
return addr.getHostAddress();
}
/**
* Returns the local port to which this socket is bound.
*
* @return the local port number to which this socket is connected.
* @exception IOException if the connection was closed
* @see SocketConnection
*/
public int getLocalPort() throws IOException {
if (ssocket.isClosed())
throw new IOException("ServerSocketConnection is closed");
return ssocket.getLocalPort();
}
}