Examples of java.net.SocketPermission

java.net.SocketPermission
etf.org/rfc/rfc2732.txt">RFC 2732: Format for Literal IPv6 Addresses in URLs:
```
 ipv6reference = "[" IPv6address "]" 
```
For example, you can construct a SocketPermission instance as the following:
```
 String hostAddress = inetaddress.getHostAddress(); if (inetaddress instanceof Inet6Address) { sp = new SocketPermission("[" + hostAddress + "]:" + port, action); } else { sp = new SocketPermission(hostAddress + ":" + port, action); } 
```
or
```
 String host = url.getHost(); sp = new SocketPermission(host + ":" + port, action); 
```
The full uncompressed form of an IPv6 literal address is also valid.
The port or portrange is optional. A port specification of the form "N-", where N is a port number, signifies all ports numbered N and above, while a specification of the form "-N" indicates all ports numbered N and below.
The possible ways to connect to the host are
```
 accept connect listen resolve 
```
The "listen" action is only meaningful when used with "localhost". The "resolve" action is implied when any of the other actions are present. The action "resolve" refers to host/ip name service lookups.
As an example of the creation and meaning of SocketPermissions, note that if the following permission:
```
 p1 = new SocketPermission("puffin.eng.sun.com:7777", "connect,accept"); 
```
is granted to some code, it allows that code to connect to port 7777 on puffin.eng.sun.com, and to accept connections on that port.
Similarly, if the following permission:
```
 p1 = new SocketPermission("puffin.eng.sun.com:7777", "connect,accept"); p2 = new SocketPermission("localhost:1024-", "accept,connect,listen"); 
```
is granted to some code, it allows that code to accept connections on, connect to, or listen on any port between 1024 and 65535 on the local host.
Note: Granting code permission to accept or make connections to remote hosts may be dangerous because malevolent code can then more easily transfer and share confidential data among parties who may not otherwise have access to the data. @see java.security.Permissions @see SocketPermission @version 1.67 09/02/24 @author Marianne Mueller @author Roland Schemers @serial exclude

     * @param port
     *            int the port number to check
     */
    public void checkListen(int port) {
        if (port == 0) {
            checkPermission(new SocketPermission("localhost:1024-", "listen")); //$NON-NLS-1$ //$NON-NLS-2$
        } else {
            checkPermission(new SocketPermission("localhost:" + port, "listen")); //$NON-NLS-1$//$NON-NLS-2$
        }
    }

View Full Code Here

    /**
     * Checks whether the running program is allowed to join, leave or send to a
     * multicast address.
     */
    public void checkMulticast(InetAddress maddr) {
        checkPermission(new SocketPermission(maddr.getHostAddress(),
                "accept,connect")); //$NON-NLS-1$
    }

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     * 
     * @deprecated use SecurityManager#checkMulticast(java.net.InetAddress)
     */
    @Deprecated
    public void checkMulticast(InetAddress maddr, byte ttl) {
        checkPermission(new SocketPermission(maddr.getHostAddress(),
                "accept,connect")); //$NON-NLS-1$
    }

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            if (docURL.getPort() != -1) {
                docHost += ":" + docURL.getPort();
            }


            permissions[0][0] = "SocketPermission accept " + docHost;
            permissions[0][1] = new SocketPermission(docHost, "accept");
            permissions[1][0] = "SocketPermission connect " + docHost;
            permissions[1][1] = new SocketPermission(docHost, "connect");
            permissions[2][0] = "SocketPermission resolve " + docHost;
            permissions[2][1] = new SocketPermission(docHost, "resolve");
            nGrantedTmp = 3;
        } else {
            permissions = basePermissions;
        }

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            if (docURL.getPort() != -1) {
                docHost += ":" + docURL.getPort();
            }


            permissions[0][0] = "SocketPermission accept " + docHost;
            permissions[0][1] = new SocketPermission(docHost, "accept");
            permissions[1][0] = "SocketPermission connect " + docHost;
            permissions[1][1] = new SocketPermission(docHost, "connect");
            permissions[2][0] = "SocketPermission resolve " + docHost;
            permissions[2][1] = new SocketPermission(docHost, "resolve");
        } else {
            permissions = basePermissions;
        }


        EventTarget root = (EventTarget)document.getDocumentElement();

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                docHost += ":" + docURL.getPort();
            }


            int i=0;
            permissions[i][0] = "SocketPermission accept " + docHost;
            permissions[i][1] = new SocketPermission(docHost, "accept");
            i++;


            permissions[i][0] = "SocketPermission connect " + docHost;
            permissions[i][1] = new SocketPermission(docHost, "connect");
            i++;


            permissions[i][0] = "SocketPermission resolve " + docHost;
            permissions[i][1] = new SocketPermission(docHost, "resolve");
            i++;
            
            permissions[i][0] = "RuntimePermission stopThread";
            permissions[i][1] = new RuntimePermission("stopThread");
            i++;

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    }


    @Override
    public Permission getPermission() throws IOException {
        return new SocketPermission(getHostName() + ":" + getHostPort(), //$NON-NLS-1$
                "connect, resolve"); //$NON-NLS-1$
    }

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    public Permission getPermission() throws IOException {
        int port = url.getPort();
        if (port <= 0) {
            port = FTP_PORT;
        }
        return new SocketPermission(hostName + ":" + port, "connect, resolve"); //$NON-NLS-1$ //$NON-NLS-2$
    }

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                    // }
                    //
                    // let's cache it: 


                    if (this.sp == null) {
                        this.sp = new SocketPermission(thisHost, "resolve"); //$NON-NLS-1$
                    }


                    if (cs.sp == null) {
                        cs.sp = new SocketPermission(thatHost, "resolve"); //$NON-NLS-1$
                    }


                    if (!this.sp.implies(cs.sp)) {
                        return false;
                    }

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     */
    public void checkAccept(String host, int port) {
        if (host == null) {
            throw new NullPointerException();
        }
        checkPermission(new SocketPermission(host + ':' + port, "accept")); //$NON-NLS-1$
    }

View Full Code Here

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