On Wed, 5 Apr 2023 12:33:40 GMT, Daniel Jeliński <djelin...@openjdk.org> wrote:
> Hi, could you check if the value returned by > [Java_sun_nio_ch_Net_shouldSetBothIPv4AndIPv6Options0](https://github.com/openjdk/jdk/blob/0deb648985b018653ccdaf193dc13b3cf21c088a/src/java.base/unix/native/libnio/ch/Net.c#L159-L167) > is correct on AIX? > > More specifically, this piece of code should throw an exception mentioning > that the message is too big for the underlying transport: > > ``` > DatagramChannel channel = DatagramChannel.open(StandardProtocolFamily.INET6); > channel.setOption(ExtendedSocketOptions.IP_DONTFRAGMENT, true); > channel.send(ByteBuffer.allocate(64000), > new InetSocketAddress("bugs.openjdk.org", 1234)); > ``` > > on Windows and Linux it works (i.e. throws) because > `shouldSetBothIPv4AndIPv6Options0` returns `true`; on MacOSX it doesn't work > even if `shouldSetBothIPv4AndIPv6Options0` returns `true`, so we return > `false`; it would be interesting how AIX behaves here. Hi @djelinski , On AIX I'm getting socket exception stating the message is too long. STDERR: java.net.SocketException: Message too long at java.base/sun.nio.ch.DatagramChannelImpl.send0(Native Method) at java.base/sun.nio.ch.DatagramChannelImpl.sendFromNativeBuffer(DatagramChannelImpl.java:945) at java.base/sun.nio.ch.DatagramChannelImpl.send(DatagramChannelImpl.java:921) at java.base/sun.nio.ch.DatagramChannelImpl.send(DatagramChannelImpl.java:864) at DontFragmentTest.main(DontFragmentTest.java:54) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) at java.base/java.lang.reflect.Method.invoke(Method.java:578) at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125) at java.base/java.lang.Thread.run(Thread.java:1623) JavaTest Message: Test threw exception: java.net.SocketException: Message too long ------------- PR Comment: https://git.openjdk.org/jdk/pull/13240#issuecomment-1498551079
