server/ACL/ACLServerSocket.java

//---PACKAGE DECLARATION---
//package uk.org.iscream.cms.server.util;

//---IMPORTS---
import uk.org.iscream.cms.server.util.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.InetAddress;
import java.io.IOException;

/**
 * Access Control List ServerSocket wrapper. Used
 * to wrap a ServerSocket with an ACL, whilst extending
 * ServerSocket to make integration into code easier.
 * Once the ACL has been set, accept() can be used exactly
 * as it would be with a ServerSocket.
 *
 * @author  $Author: tdb $
 * @version $Id: ACLServerSocket.java,v 1.2 2001/12/20 00:59:54 tdb Exp $
 */
public class ACLServerSocket extends ServerSocket {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.2 $";

//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * See relevant ServerSocket constructor.
     */
    public ACLServerSocket(int port) throws IOException {
        super(port);
        setACL(new ACL());
    }
    
    /**
     * See relevant ServerSocket constructor.
     */
    public ACLServerSocket(int port, int backlog) throws IOException {
        super(port, backlog);
        setACL(new ACL());
    }
    
    /**
     * See relevant ServerSocket constructor.
     */
    public ACLServerSocket(int port, int backlog, InetAddress bindAddr) throws IOException {
        super(port, backlog, bindAddr);
        setACL(new ACL());
    }
    
    /**
     * See relevant ServerSocket constructor, and
     * sets the default acl.
     */
    public ACLServerSocket(ACL acl, int port) throws IOException {
        super(port);
        setACL(acl);
    }
    
    /**
     * See relevant ServerSocket constructor, and
     * sets the default acl.
     */
    public ACLServerSocket(ACL acl, int port, int backlog) throws IOException {
        super(port, backlog);
        setACL(acl);
    }
    
    /**
     * See relevant ServerSocket constructor, and
     * sets the default acl.
     */
    public ACLServerSocket(ACL acl, int port, int backlog, InetAddress bindAddr) throws IOException {
        super(port, backlog, bindAddr);
        setACL(acl);
    }

//---PUBLIC METHODS---

    /**
     * Essentially has the same behaviour as the
     * ServerSocket.accept() method, except won't
     * return a Socket unless it is permitted by
     * the ACL. Closes Socket's immediately that
     * aren't permitted by the ACL.
     */
    public Socket accept() throws IOException {
        while(true) {
            Socket s = super.accept();
            if(_acl.check(s.getInetAddress())) {
                return s;
            }
            else {
                s.close();
            }
        }
    }
    
    /**
     * Set the ACL at any point in the operation
     * of the ServerSocket.
     *
     * @param acl the new ACL to apply
     */
    public void setACL(ACL acl) {
        _acl = acl;
    }
    
    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * This uses the uk.org.iscream.cms.server.util.FormatName class
     * to format the toString()
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return FormatName.getName(
            _name,
            getClass().getName(),
            REVISION) + ":" + super.toString();
    }

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

    /**
     * This is the friendly identifier of the
     * component this class is running in.
     * eg, a Filter may be called "filter1",
     * If this class does not have an owning
     * component,  a name from the configuration
     * can be placed here.  This name could also
     * be changed to null for utility classes.
     */
    private String _name = null;
    
    /**
     * The ACL used by this ACLServerSocket.
     */
    private ACL _acl;
    
//---STATIC ATTRIBUTES---

//---INNER CLASSES---

}
Revision:	1.3
Committed:	Mon Dec 31 02:57:00 2001 UTC (22 years, 4 months ago) by tdb
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.2:	+5 -5 lines
Log Message:	Added an ACLDatagramSocket. Operation is much the same as the ACLServerSocket. Also tweaked the toString() to keep the i-scream bits as well as the more useful stuff.
#	Content
1	//---PACKAGE DECLARATION---
2	//package uk.org.iscream.cms.server.util;
3
4	//---IMPORTS---
5	import uk.org.iscream.cms.server.util.*;
6	import java.net.ServerSocket;
7	import java.net.Socket;
8	import java.net.InetAddress;
9	import java.io.IOException;
10
11	/**
12	* Access Control List ServerSocket wrapper. Used
13	* to wrap a ServerSocket with an ACL, whilst extending
14	* ServerSocket to make integration into code easier.
15	* Once the ACL has been set, accept() can be used exactly
16	* as it would be with a ServerSocket.
17	*
18	* @author $Author: tdb $
19	* @version $Id: ACLServerSocket.java,v 1.2 2001/12/20 00:59:54 tdb Exp $
20	*/
21	public class ACLServerSocket extends ServerSocket {
22
23	//---FINAL ATTRIBUTES---
24
25	/**
26	* The current CVS revision of this class
27	*/
28	public static final String REVISION = "$Revision: 1.2 $";
29
30	//---STATIC METHODS---
31
32	//---CONSTRUCTORS---
33
34	/**
35	* See relevant ServerSocket constructor.
36	*/
37	public ACLServerSocket(int port) throws IOException {
38	super(port);
39	setACL(new ACL());
40	}
41
42	/**
43	* See relevant ServerSocket constructor.
44	*/
45	public ACLServerSocket(int port, int backlog) throws IOException {
46	super(port, backlog);
47	setACL(new ACL());
48	}
49
50	/**
51	* See relevant ServerSocket constructor.
52	*/
53	public ACLServerSocket(int port, int backlog, InetAddress bindAddr) throws IOException {
54	super(port, backlog, bindAddr);
55	setACL(new ACL());
56	}
57
58	/**
59	* See relevant ServerSocket constructor, and
60	* sets the default acl.
61	*/
62	public ACLServerSocket(ACL acl, int port) throws IOException {
63	super(port);
64	setACL(acl);
65	}
66
67	/**
68	* See relevant ServerSocket constructor, and
69	* sets the default acl.
70	*/
71	public ACLServerSocket(ACL acl, int port, int backlog) throws IOException {
72	super(port, backlog);
73	setACL(acl);
74	}
75
76	/**
77	* See relevant ServerSocket constructor, and
78	* sets the default acl.
79	*/
80	public ACLServerSocket(ACL acl, int port, int backlog, InetAddress bindAddr) throws IOException {
81	super(port, backlog, bindAddr);
82	setACL(acl);
83	}
84
85	//---PUBLIC METHODS---
86
87	/**
88	* Essentially has the same behaviour as the
89	* ServerSocket.accept() method, except won't
90	* return a Socket unless it is permitted by
91	* the ACL. Closes Socket's immediately that
92	* aren't permitted by the ACL.
93	*/
94	public Socket accept() throws IOException {
95	while(true) {
96	Socket s = super.accept();
97	if(_acl.check(s.getInetAddress())) {
98	return s;
99	}
100	else {
101	s.close();
102	}
103	}
104	}
105
106	/**
107	* Set the ACL at any point in the operation
108	* of the ServerSocket.
109	*
110	* @param acl the new ACL to apply
111	*/
112	public void setACL(ACL acl) {
113	_acl = acl;
114	}
115
116	/**
117	* Overrides the {@link java.lang.Object#toString() Object.toString()}
118	* method to provide clean logging (every class should have this).
119	*
120	* This uses the uk.org.iscream.cms.server.util.FormatName class
121	* to format the toString()
122	*
123	* @return the name of this class and its CVS revision
124	*/
125	public String toString() {
126	return FormatName.getName(
127	_name,
128	getClass().getName(),
129	REVISION) + ":" + super.toString();
130	}
131
132	//---PRIVATE METHODS---
133
134	//---ACCESSOR/MUTATOR METHODS---
135
136	//---ATTRIBUTES---
137
138	/**
139	* This is the friendly identifier of the
140	* component this class is running in.
141	* eg, a Filter may be called "filter1",
142	* If this class does not have an owning
143	* component, a name from the configuration
144	* can be placed here. This name could also
145	* be changed to null for utility classes.
146	*/
147	private String _name = null;
148
149	/**
150	* The ACL used by this ACLServerSocket.
151	*/
152	private ACL _acl;
153
154	//---STATIC ATTRIBUTES---
155
156	//---INNER CLASSES---
157
158	}