Update project structure to org.onap

[dmaap/datarouter.git] / datarouter-node / src / main / java / org / onap / dmaap / datarouter / node / SubnetMatcher.java

diff --git a/datarouter-node/src/main/java/org/onap/dmaap/datarouter/node/SubnetMatcher.java b/datarouter-node/src/main/java/org/onap/dmaap/datarouter/node/SubnetMatcher.java
new file mode 100644 (file)
index 0000000..f353d51
--- /dev/null
+++ b/datarouter-node/src/main/java/org/onap/dmaap/datarouter/node/SubnetMatcher.java
@@ -0,0 +1,71 @@
+/*******************************************************************************\r
+ * ============LICENSE_START==================================================\r
+ * * org.onap.dmaap\r
+ * * ===========================================================================\r
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.\r
+ * * ===========================================================================\r
+ * * Licensed under the Apache License, Version 2.0 (the "License");\r
+ * * you may not use this file except in compliance with the License.\r
+ * * You may obtain a copy of the License at\r
+ * * \r
+ *  *      http://www.apache.org/licenses/LICENSE-2.0\r
+ * * \r
+ *  * Unless required by applicable law or agreed to in writing, software\r
+ * * distributed under the License is distributed on an "AS IS" BASIS,\r
+ * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ * * See the License for the specific language governing permissions and\r
+ * * limitations under the License.\r
+ * * ============LICENSE_END====================================================\r
+ * *\r
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.\r
+ * *\r
+ ******************************************************************************/\r
+\r
+\r
+package org.onap.dmaap.datarouter.node;\r
+\r
+import java.net.*;\r
+\r
+/**\r
+ *     Compare IP addresses as byte arrays to a subnet specified as a CIDR\r
+ */\r
+public class SubnetMatcher     {\r
+       private byte[]  sn;\r
+       private int     len;\r
+       private int     mask;\r
+       /**\r
+        *      Construct a subnet matcher given a CIDR\r
+        *      @param subnet   The CIDR to match\r
+        */\r
+       public SubnetMatcher(String subnet) {\r
+               int i = subnet.lastIndexOf('/');\r
+               if (i == -1) {\r
+                       sn = NodeUtils.getInetAddress(subnet);\r
+                       len = sn.length;\r
+               } else {\r
+                       len = Integer.parseInt(subnet.substring(i + 1));\r
+                       sn = NodeUtils.getInetAddress(subnet.substring(0, i));\r
+                       mask = ((0xff00) >> (len % 8)) & 0xff;\r
+                       len /= 8;\r
+               }\r
+       }\r
+       /**\r
+        *      Is the IP address in the CIDR?\r
+        *      @param addr the IP address as bytes in network byte order\r
+        *      @return true if the IP address matches.\r
+        */\r
+       public boolean matches(byte[] addr) {\r
+               if (addr.length != sn.length) {\r
+                       return(false);\r
+               }\r
+               for (int i = 0; i < len; i++) {\r
+                       if (addr[i] != sn[i]) {\r
+                               return(false);\r
+                       }\r
+               }\r
+               if (mask != 0 && ((addr[len] ^ sn[len]) & mask) != 0) {\r
+                       return(false);\r
+               }\r
+               return(true);\r
+       }\r
+}\r