1 files changed, 117 insertions, 0 deletions
diff --git a/app/src/main/java/se/leap/bitmaskclient/utils/IPAddress.java b/app/src/main/java/se/leap/bitmaskclient/utils/IPAddress.java
new file mode 100644
index 00000000..8b419a2c
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/utils/IPAddress.java
@@ -0,0 +1,117 @@
+package se.leap.bitmaskclient.utils;
+
+/*
+ * Copyright (C) 2006-2008 Alfresco Software Limited.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * 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 for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of
+ * the GPL, you may redistribute this Program in connection with Free/Libre
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's
+ * FLOSS exception.  You should have recieved a copy of the text describing
+ * the FLOSS exception, and it is also available here:
+ * http://www.alfresco.com/legal/licensing"
+ */
+
+//package net.gqu.utils;
+
+import java.util.StringTokenizer;
+
+/**
+ * TCP/IP Address Utility Class
+ *
+ * @author gkspencer
+ */
+public class IPAddress {
+
+
+    /**
+     * Convert a TCP/IP address string into a byte array
+     *
+     * @param addr String
+     * @return byte[]
+     */
+    public final static byte[] asBytes(String addr) {
+
+        // Convert the TCP/IP address string to an integer value
+
+        int ipInt = parseNumericAddress(addr);
+        if ( ipInt == 0)
+            return null;
+
+        // Convert to bytes
+
+        byte[] ipByts = new byte[4];
+
+        ipByts[3] = (byte) (ipInt & 0xFF);
+        ipByts[2] = (byte) ((ipInt >> 8) & 0xFF);
+        ipByts[1] = (byte) ((ipInt >> 16) & 0xFF);
+        ipByts[0] = (byte) ((ipInt >> 24) & 0xFF);
+
+        // Return the TCP/IP bytes
+
+        return ipByts;
+    }
+    /**
+     * Check if the specified address is a valid numeric TCP/IP address and return as an integer value
+     *
+     * @param ipaddr String
+     * @return int
+     */
+    public final static int parseNumericAddress(String ipaddr) {
+
+        //  Check if the string is valid
+
+        if ( ipaddr == null || ipaddr.length() < 7 || ipaddr.length() > 15)
+            return 0;
+
+        //  Check the address string, should be n.n.n.n format
+
+        StringTokenizer token = new StringTokenizer(ipaddr,".");
+        if ( token.countTokens() != 4)
+            return 0;
+
+        int ipInt = 0;
+
+        while ( token.hasMoreTokens()) {
+
+            //  Get the current token and convert to an integer value
+
+            String ipNum = token.nextToken();
+
+            try {
+
+                //  Validate the current address part
+
+                int ipVal = Integer.valueOf(ipNum).intValue();
+                if ( ipVal < 0 || ipVal > 255)
+                    return 0;
+
+                //  Add to the integer address
+
+                ipInt = (ipInt << 8) + ipVal;
+            }
+            catch (NumberFormatException ex) {
+                return 0;
+            }
+        }
+
+        //  Return the integer address
+
+        return ipInt;
+    }
+
+
+}
+\ No newline at end of file