merged 1.1 branch into head

[mir.git] / source / mir / util / InternetRoutines.java

diff --git a/source/mir/util/InternetRoutines.java b/source/mir/util/InternetRoutines.java
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+++ b/source/mir/util/InternetRoutines.java
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+/*
+ * Copyright (C) 2001, 2002  The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir 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.
+ *
+ * Mir 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 Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with the com.oreilly.servlet library, any library
+ * licensed under the Apache Software License, The Sun (tm) Java Advanced
+ * Imaging library (JAI), The Sun JIMI library (or with modified versions of
+ * the above that use the same license as the above), and distribute linked
+ * combinations including the two.  You must obey the GNU General Public
+ * License in all respects for all of the code used other than the above
+ * mentioned libraries.  If you modify this file, you may extend this exception
+ * to your version of the file, but you are not obligated to do so.  If you do
+ * not wish to do so, delete this exception statement from your version.
+ */
+
+package mir.util;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.List;
+
+public class InternetRoutines {
+  protected InternetRoutines() {
+  }
+
+  public static boolean isIpAddressInNetwork(String anIpAddress, String aNetwork) throws Exception {
+    long ipAddress = parseHostNameOrIPAddress(anIpAddress);
+    long network = 0;
+    long netMask = (1L<<32)-1;
+    List networkParts = StringRoutines.separateString(aNetwork, "/");
+
+    network = parseHostNameOrIPAddress((String) networkParts.get(0));
+    if (networkParts.size()>=2) {
+      netMask=parseNetmask((String) networkParts.get(1));
+    }
+
+    return (ipAddress & netMask ) == (network & netMask);
+  }
+
+  public static long parseHostNameOrIPAddress(String aHostName) throws Exception {
+    InetAddress addr = InetAddress.getByName(aHostName.trim());
+    return
+        ((((long) addr.getAddress()[0])&255) << 24) +
+        ((((long) addr.getAddress()[1])&255) << 16) +
+        ((((long) addr.getAddress()[2])&255) << 8) +
+        ((((long) addr.getAddress()[3])&255));
+  }
+
+  public static long parseIPAddress(String anIpAddress) throws Exception {
+    int[] parts = {0,0,0,0};
+    int i;
+    List stringParts = StringRoutines.splitString(anIpAddress, ".");
+
+    if (stringParts.size()!=4)
+      throw new Exception("Not a valid IP Address: " + anIpAddress);
+
+    try {
+      for (i=0; i<4; i++) {
+        parts[i] = Integer.parseInt(((String) stringParts.get(i)).trim());
+      }
+    }
+    catch (Throwable t) {
+      throw new Exception("Not a valid IP Address: " + anIpAddress);
+    }
+    for (i=0; i<4; i++) {
+      if (parts[i]<0 || parts[i]>255)
+        throw new Exception("Not a valid IP Address: " + anIpAddress);
+    }
+
+    return parts[0]<<24 | parts[1]<<16 | parts[2]<<8 | parts[3];
+  }
+
+  public static long parseNetmask(String anIpAddress) throws Exception {
+    try {
+      return parseIPAddress(anIpAddress);
+    }
+    catch (Throwable t) {
+    }
+
+    try {
+      int size = Integer.parseInt(anIpAddress);
+
+      if (size<=32)
+        return ((1L<<size)-1)<<(32-size);
+    }
+    catch (Throwable t) {
+    }
+
+    return (1L<<32)-1;
+  }
+}
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