1 files changed, 51 insertions, 3 deletions
diff --git a/libjava/classpath/java/net/NetworkInterface.java b/libjava/classpath/java/net/NetworkInterface.java
index a3a6058afa1..5ec64ff16ce 100644
--- a/libjava/classpath/java/net/NetworkInterface.java
+++ b/libjava/classpath/java/net/NetworkInterface.java
@@ -1,5 +1,5 @@
 /* NetworkInterface.java --
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2008 Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
@@ -40,6 +40,8 @@ package java.net;
 
 import gnu.classpath.SystemProperties;
 
+import gnu.java.lang.CPStringBuilder;
+
 import java.util.Enumeration;
 import java.util.Iterator;
 import java.util.Vector;
@@ -247,10 +249,10 @@ public final class NetworkInterface
   public String toString()
   {
     // FIXME: check if this is correct
-    StringBuffer result;
+    CPStringBuilder result;
     String separator = SystemProperties.getProperty("line.separator");
 
-    result = new StringBuffer();
+    result = new CPStringBuilder();
     
     result.append("name: ");
     result.append(getDisplayName());
@@ -265,4 +267,50 @@ public final class NetworkInterface
 
     return result.toString();
   }
+
+  /**
+   * Determines whether this interface is ready to transfer data.
+   *
+   * @return whether the interface is up
+  */
+  public boolean isUp()
+    throws SocketException
+  {
+    return VMNetworkInterface.isUp(netif.name);
+  }
+
+  /**
+   * Determines whether this interface does point to point
+   * transmission.
+   *
+   * @return whether the interface does point to point transmission
+  */
+  public boolean isPointToPoint()
+    throws SocketException
+  {
+    return VMNetworkInterface.isPointToPoint(netif.name);
+  }
+
+  /**
+   * Determines whether this interface is the loopback interface.
+   *
+   * @return whether the interface is the loopback interface
+  */
+  public boolean isLoopback()
+    throws SocketException
+  {
+    return VMNetworkInterface.isLoopback(netif.name);
+  }
+
+  /**
+   * Determines whether this interface supports multicast transmission.
+   *
+   * @return whether the interface supports multicast transmission.
+  */
+  public boolean supportsMulticast()
+    throws SocketException
+  {
+    return VMNetworkInterface.supportsMulticast(netif.name);
+  }
+
 }