OF-1007: Reduce code duplication

The code that verifies if an IP is on an (anonymous) whitelist is duplicated. That
code should be centralized, similar to its non-anonymous cousin in LocalClientSession.

src/java/org/jivesoftware/openfire/handler/IQAuthHandler.java

@@ -330,24 +330,7 @@ public class IQAuthHandler extends IQHandler implements IQAuthInfo {
         IQ response = IQ.createResultIQ(packet);
         if (anonymousAllowed) {
             // Verify that client can connect from his IP address
-            boolean forbidAccess = false;
-            try {
-                String hostAddress = session.getConnection().getHostAddress();
-                if (!LocalClientSession.getWhitelistedAnonymousIPs().isEmpty() && !LocalClientSession.getWhitelistedAnonymousIPs().contains( hostAddress )) {
-                    byte[] address = session.getConnection().getAddress();
-                    String range1 = (address[0] & 0xff) + "." + (address[1] & 0xff) + "." + (address[2] & 0xff) + ".*";
-                    String range2 = (address[0] & 0xff) + "." + (address[1] & 0xff) + ".*.*";
-                    String range3 = (address[0] & 0xff) + ".*.*.*";
-                    if (!LocalClientSession.getWhitelistedAnonymousIPs().contains(range1) &&
-                        !LocalClientSession.getWhitelistedAnonymousIPs().contains(range2) &&
-                        !LocalClientSession.getWhitelistedAnonymousIPs().contains(range3))
-                    {
-                        forbidAccess = true;
-                    }
-                }
-            } catch (UnknownHostException e) {
-                forbidAccess = true;
-            }
+            boolean forbidAccess = !LocalClientSession.isAllowedAnonymous( session.getConnection() );
             if (forbidAccess) {
                 // Connection forbidden from that IP address
                 response.setChildElement(packet.getChildElement().createCopy());

src/java/org/jivesoftware/openfire/net/SASLAuthentication.java

@@ -472,25 +472,7 @@ public class SASLAuthentication {
     private static Status doAnonymousAuthentication(LocalSession session) {
         if (XMPPServer.getInstance().getIQAuthHandler().isAnonymousAllowed()) {
             // Verify that client can connect from his IP address
-            boolean forbidAccess = false;
-            try {
-                String hostAddress = session.getConnection().getHostAddress();
-                if (!LocalClientSession.getWhitelistedAnonymousIPs().isEmpty() &&
-                        !LocalClientSession.getWhitelistedAnonymousIPs().contains(hostAddress)) {
-                    byte[] address = session.getConnection().getAddress();
-                    String range1 = (address[0] & 0xff) + "." + (address[1] & 0xff) + "." + (address[2] & 0xff) + ".*";
-                    String range2 = (address[0] & 0xff) + "." + (address[1] & 0xff) + ".*.*";
-                    String range3 = (address[0] & 0xff) + ".*.*.*";
-                    if (!LocalClientSession.getWhitelistedAnonymousIPs().contains(range1) &&
-                        !LocalClientSession.getWhitelistedAnonymousIPs().contains(range2) &&
-                        !LocalClientSession.getWhitelistedAnonymousIPs().contains(range3))
-                    {
-                        forbidAccess = true;
-                    }
-                }
-            } catch (UnknownHostException e) {
-                forbidAccess = true;
-            }
+            boolean forbidAccess = !LocalClientSession.isAllowedAnonymous( session.getConnection() );
             if (forbidAccess) {
                 authenticationFailed(session, Failure.NOT_AUTHORIZED);
                 return Status.failed;

src/java/org/jivesoftware/openfire/session/LocalClientSession.java

@@ -31,7 +31,6 @@ import org.jivesoftware.openfire.auth.AuthToken;
 import org.jivesoftware.openfire.auth.UnauthorizedException;
 import org.jivesoftware.openfire.cluster.ClusterManager;
 import org.jivesoftware.openfire.net.SASLAuthentication;
-import org.jivesoftware.openfire.net.SocketConnection;
 import org.jivesoftware.openfire.privacy.PrivacyList;
 import org.jivesoftware.openfire.privacy.PrivacyListManager;
 import org.jivesoftware.openfire.spi.ConnectionConfiguration;
@@ -366,13 +365,7 @@ public class LocalClientSession extends LocalSession implements ClientSession {
             boolean forbidAccess = false;
             try {
                 if (!allowedIPs.contains(connection.getHostAddress())) {
-                    byte[] address = connection.getAddress();
-                    String range1 = (address[0] & 0xff) + "." + (address[1] & 0xff) + "." + (address[2] & 0xff) + ".*";
-                    String range2 = (address[0] & 0xff) + "." + (address[1] & 0xff) + ".*.*";
-                    String range3 = (address[0] & 0xff) + ".*.*.*";
-                    if (!allowedIPs.contains(range1) && !allowedIPs.contains(range2) && !allowedIPs.contains(range3)) {
-                        forbidAccess = true;
-                    }
+                    forbidAccess = !isAddressInRange( connection.getAddress(), allowedIPs );
                 }
             } catch (UnknownHostException e) {
                 forbidAccess = true;
@@ -382,6 +375,31 @@ public class LocalClientSession extends LocalSession implements ClientSession {
         return true;
     }
 
+    public static boolean isAllowedAnonymous(Connection connection) {
+        if (!allowedAnonymIPs.isEmpty()) {
+            boolean forbidAccess = false;
+            try {
+                if (!allowedAnonymIPs.contains(connection.getHostAddress())) {
+                    forbidAccess = !isAddressInRange( connection.getAddress(), allowedAnonymIPs );
+                }
+            }
+            catch (UnknownHostException e){
+                forbidAccess = true;
+            }
+            return !forbidAccess;
+        }
+        return true;
+    }
+
+    // TODO Add IPv6 support
+    public static boolean isAddressInRange( byte[] address, Set<String> ranges ) {
+        final String range0 = (address[0] & 0xff) + "." + (address[1] & 0xff) + "." + (address[2] & 0xff) + "." + (address[3] & 0xff);
+        final String range1 = (address[0] & 0xff) + "." + (address[1] & 0xff) + "." + (address[2] & 0xff) + ".*";
+        final String range2 = (address[0] & 0xff) + "." + (address[1] & 0xff) + ".*.*";
+        final String range3 = (address[0] & 0xff) + ".*.*.*";
+        return ranges.contains(range0) || ranges.contains(range1) || ranges.contains(range2) || ranges.contains(range3);
+    }
+
     /**
      * Sets the list of IP address that are allowed to connect to the server. If the list is
      * empty then anyone is allowed to connect to the server except for anonymous users that are