reset a3, kut Charlie ;)

[tt2015.git] / a3 / code / jtorx / server / NetHelper.java

diff --git a/a3/code/jtorx/server/NetHelper.java b/a3/code/jtorx/server/NetHelper.java
new file mode 100644 (file)
index 0000000..abbca1b
--- /dev/null
+++ b/a3/code/jtorx/server/NetHelper.java
@@ -0,0 +1,94 @@
+import static java.lang.System.out;\r
+\r
+import java.net.InetAddress;\r
+import java.net.NetworkInterface;\r
+import java.net.SocketException;\r
+import java.util.Collections;\r
+import java.util.Enumeration;\r
+\r
+// this utility displays information on addresses and ports, you don't need to use it\r
+public class NetHelper \r
+{\r
+    public static void main(String args[]) throws SocketException {\r
+        Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();\r
+        \r
+        for (NetworkInterface netIf : Collections.list(nets)) {\r
+            out.printf("Display name: %s\n", netIf.getDisplayName());\r
+            out.printf("Name: %s\n", netIf.getName());\r
+            displayInterfaceInformation(netIf);\r
+            displaySubInterfaces(netIf);\r
+            out.printf("\n");\r
+        }\r
+    }\r
+    \r
+       public static NetworkInterface getNetworkInterface(String netName) {\r
+               NetworkInterface netIntf = null;\r
+               try {\r
+                       for (Enumeration<NetworkInterface> en = NetworkInterface\r
+                                       .getNetworkInterfaces(); en.hasMoreElements();) {\r
+                               NetworkInterface intf = en.nextElement();\r
+                               if (intf.getName().compareToIgnoreCase(netName) == 0) {\r
+                                       netIntf = intf;\r
+                                       break;\r
+                               }\r
+                       }\r
+               } catch (SocketException e) {\r
+                       System.out\r
+                                       .println("Socket Exception failed to find internet addresses!");\r
+                       e.printStackTrace();\r
+                       System.exit(0);\r
+               }\r
+               return netIntf;\r
+       }\r
+\r
+       public static InetAddress getFirstNonLocalHost(NetworkInterface netIntf) {\r
+               Enumeration<InetAddress> hosts = netIntf.getInetAddresses();\r
+               InetAddress address = null;\r
+               while (hosts.hasMoreElements()) {\r
+                       InetAddress host = hosts.nextElement();\r
+                       if (!host.isLinkLocalAddress() && !host.isLoopbackAddress()) {\r
+                               address = host;\r
+                               break;\r
+                       }\r
+               }\r
+               return address;\r
+       }\r
+\r
+    \r
+    \r
+    static String getMac(NetworkInterface netint) throws SocketException {\r
+       byte[] mac = netint.getHardwareAddress();\r
+       String rez = "null";\r
+       if(mac != null) {\r
+                   StringBuilder sb = new StringBuilder();\r
+                   for (int i = 0; i < mac.length; i++) {\r
+                       sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));        \r
+                   }\r
+                   rez = sb.toString();\r
+       }\r
+       return rez;\r
+           //System.out.println(sb.toString());\r
+    }\r
+    \r
+    static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {\r
+        out.printf("Display name: %s\n", netint.getDisplayName());\r
+        out.printf("Name: %s\n", netint.getName());\r
+        out.printf("MAC: %s\n", getMac(netint));\r
+        Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();\r
+        for (InetAddress inetAddress : Collections.list(inetAddresses)) {\r
+            out.printf("InetAddress: %s\n", inetAddress);\r
+            out.println("LOCAL:" + Boolean.toString(inetAddress.isLoopbackAddress() || inetAddress.isLinkLocalAddress()));\r
+        }\r
+        out.printf("\n");\r
+     }\r
+\r
+    static void displaySubInterfaces(NetworkInterface netIf) throws SocketException {\r
+        Enumeration<NetworkInterface> subIfs = netIf.getSubInterfaces();\r
+        \r
+        for (NetworkInterface subIf : Collections.list(subIfs)) {\r
+            out.printf("\tSub Interface Display name: %s\n", subIf.getDisplayName());\r
+            out.printf("\tSub Interface Name: %s\n", subIf.getName());\r
+            displayInterfaceInformation(subIf);\r
+        }\r
+     }\r
+}  
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