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

          result.equals(perm));


      URL httpUrl = new URL("http://home/myfile/");
      assertTrue("Wrong http: permission", httpUrl.openConnection()
          .getPermission().equals(
              new SocketPermission("home:80", "connect")));
      httpUrl = new URL("http://home2:8080/myfile/");
      assertTrue("Wrong http: permission", httpUrl.openConnection()
          .getPermission().equals(
              new SocketPermission("home2:8080", "connect")));
      URL ftpUrl = new URL("ftp://home/myfile/");
      assertTrue("Wrong ftp: permission", ftpUrl.openConnection()
          .getPermission().equals(
              new SocketPermission("home:21", "connect")));
      ftpUrl = new URL("ftp://home2:22/myfile/");
      assertTrue("Wrong ftp: permission", ftpUrl.openConnection()
          .getPermission().equals(
              new SocketPermission("home2:22", "connect")));


      URL jarUrl = new URL("jar:file:myfile!/");
      perm = new FilePermission("myfile", "read");
      result = jarUrl.openConnection().getPermission();
      assertTrue("Wrong jar: permission:" + perm + " , " + result, result

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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");
            nGrantedTmp = 3;
        } else {
            permissions = basePermissions;
        }

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  public FirewallingSecurityManager()
  {
    parent = System.getSecurityManager();


    final SocketPermission localHost = new SocketPermission(LOCALHOST, PERMISSION_VALUE);
    final SocketPermission localHostRaw = new SocketPermission(LOCALHOST_IP, PERMISSION_VALUE);
    final SocketPermission localHostFqn = new SocketPermission(LOCALHOST_LOCALDOMAIN, PERMISSION_VALUE);
    permissionCollection = localHost.newPermissionCollection();
    permissionCollection.add(localHost);
    permissionCollection.add(localHostRaw);
    permissionCollection.add(localHostFqn);
  }

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    for (int i = 0; i < hosts.length; i++) {
      for (int j = 0; j < ports.length; j++) {
  Test test = new Test(hosts[i], ports[j]);
  
  SocketPermission px = new SocketPermission(test.x, "connect");
  SocketPermission py = new SocketPermission(test.y, "connect");


  try {
    harness.check(px.implies(py) == test.expect, test.x + " should"
      + (test.expect ? "" : " not") + " imply " + test.y);
  }
  catch (Exception e) {
    harness.check(false, test.x + " implies " + test.y + " failed");
    harness.debug(e);
  }
      }
    }


    harness.checkPoint("actions checking");
    for (int i = 1; i < 1 << actions.length; i++) {
      for (int j = 1; j < 1 << actions.length; j++) {
  SocketPermission pi = new SocketPermission("localhost", makeAction(i));
  SocketPermission pj = new SocketPermission("localhost", makeAction(j));


  harness.check(pi.implies(pj) == ((maybeAddResolve(i) & j) == j));
      }
    }
  }

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      byte[] recvbuf = new byte[sendbuf.length];
      DatagramPacket recvpack = new DatagramPacket(recvbuf, recvbuf.length);
    
      Permission[] checkResolve = new Permission[] {
  new SocketPermission(hostaddr, "resolve")};
      
      Permission[] checkListen80 = new Permission[] {
   new SocketPermission("localhost:80", "listen")};


      Permission[] checkListen1024plus = new Permission[] {
   new SocketPermission("localhost:1024-", "listen")};


      Permission[] checkConnect1 = new Permission[] {
  new SocketPermission(
    hostaddr + ":" + socket1.getLocalPort(), "connect")};


      Permission[] checkAccept1 = new Permission[] {
  new SocketPermission(
    hostaddr + ":" + socket1.getLocalPort(), "accept")};
      
      Permission[] checkConnect2 = new Permission[] {
  new SocketPermission(
    hostaddr + ":" + socket2.getLocalPort(), "connect")};
      
      Permission[] checkAccept2 = new Permission[] {
  new SocketPermission(
    hostaddr + ":" + socket2.getLocalPort(), "accept")};
      
      Permission[] checkConnect3 = new Permission[] {
  new SocketPermission(
    hostaddr + ":" + socket3.getLocalPort(), "connect")};
      
      Permission[] checkAccept4 = new Permission[] {
  new SocketPermission(
    hostaddr + ":" + socket4.getLocalPort(), "accept")};
      
      Permission[] checkSetFactory = new Permission[] {
   new RuntimePermission("setFactory")};

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      ServerSocket socket = new ServerSocket(0, 50, inetaddr);
      int hostport = socket.getLocalPort();


      Permission[] checkConnect = new Permission[] {
  new SocketPermission(hostaddr + ":" + hostport, "connect")};


      Permission[] checkResolveConnect = new Permission[] {
  new SocketPermission(hostname, "resolve"),
  new SocketPermission(hostaddr + ":" + hostport, "connect")};


      Permission[] checkSelectorProvider = new Permission[] {
  new RuntimePermission("selectorProvider")};


      Permission[] checkSetFactory = new Permission[] {

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    harness.checkPoint("serialization checking");
    
    for (int i = 0; i < hosts.length; i++) {
      for (int j = 0; j < ports.length; j++) {
  for (int k = 1; k < 1 << actions.length; k++) {
    SocketPermission p1 = new SocketPermission(
      hosts[i] + ports[j], makeActions(k));
    SocketPermission p2 = null;
    try {
      ByteArrayOutputStream buffer = new ByteArrayOutputStream();
      ObjectOutput out = new ObjectOutputStream(buffer);
      out.writeObject(p1);
      out.close();

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      int sport = ssocket.getLocalPort();
      Socket csocket = new Socket(inetaddr, sport, inetaddr, 0);
      int cport = csocket.getLocalPort();
      
      Permission[] checkListen80 = new Permission[] {
   new SocketPermission("localhost:80", "listen")};


      Permission[] checkListen1024plus = new Permission[] {
   new SocketPermission("localhost:1024-", "listen")};


      Permission[] checkAccept = new Permission[] {
   new SocketPermission(hostaddr + ":" + cport, "accept")};


      Permission[] checkSelectorProvider = new Permission[] {
  new RuntimePermission("selectorProvider")};


      Permission[] checkSetFactory = new Permission[] {

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      for (int j = 0; j < ports.length; j++) {
  Test test = new Test(hosts[i], ports[j]);
  boolean success;


  try {
    new SocketPermission(test.hostport, "connect");
    success = true;
  }
  catch (IllegalArgumentException e) {
    success = false;
  }

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