diff options
Diffstat (limited to 'libjava/java/net/MulticastSocket.java')
| -rw-r--r-- | libjava/java/net/MulticastSocket.java | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libjava/java/net/MulticastSocket.java b/libjava/java/net/MulticastSocket.java index 03a6e6b..6759e3b 100644 --- a/libjava/java/net/MulticastSocket.java +++ b/libjava/java/net/MulticastSocket.java @@ -76,7 +76,7 @@ public class MulticastSocket extends DatagramSocket // JDK1.2 public void setTimeToLive(int ttl) throws IOException { - if (ttl < 0 || ttl > 255) + if (ttl <= 0 || ttl > 255) throw new IllegalArgumentException("Invalid ttl: " + ttl); impl.setTimeToLive(ttl); @@ -84,6 +84,10 @@ public class MulticastSocket extends DatagramSocket public void joinGroup(InetAddress mcastaddr) throws IOException { + // FIXME: We can't currently rely on NullPointerException being + // thrown when we invoke a method on a null object. + if (mcastaddr == null) + throw new NullPointerException("Null address"); if (! mcastaddr.isMulticastAddress()) throw new IOException("Not a Multicast address"); @@ -96,6 +100,10 @@ public class MulticastSocket extends DatagramSocket public void leaveGroup(InetAddress mcastaddr) throws IOException { + // FIXME: We can't currently rely on NullPointerException being + // thrown when we invoke a method on a null object. + if (mcastaddr == null) + throw new NullPointerException("Null address"); if (! mcastaddr.isMulticastAddress()) throw new IOException("Not a Multicast address"); |