Is isSourceFilterSupported still needed on AIX builds?

[Langer, Christoph]

Hi Alan,

I'll try your patch on AIX in the next days...

Best regards
Christoph

> -----Original Message-----
> From: Alan Bateman <Alan.Bateman at oracle.com>
> Sent: Montag, 6. Januar 2020 12:22
> To: Langer, Christoph <christoph.langer at sap.com>
> Cc: Lindenmaier, Goetz <goetz.lindenmaier at sap.com>; nio-
> dev at openjdk.java.net
> Subject: Re: Is isSourceFilterSupported still needed on AIX builds?
> 
> On 30/12/2019 22:48, Langer, Christoph wrote:
> > Hi Alan,
> >
> > I checked... Although AIX documentation only refers to IPV6_JOIN_GROUP
> and IPV6_LEAVE_GROUP, as per:
> https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_71/apis/ss
> ocko.htm we can find this in netinet/in.h in both, AIX 7.1 and AIX 7.2:
> >
> > #define	IPV6_ADD_MEMBERSHIP	IP_ADD_MEMBERSHIP
> > #define	IPV6_JOIN_GROUP		IP_ADD_MEMBERSHIP
> > #define	IPV6_DROP_MEMBERSHIP	IP_DROP_MEMBERSHIP
> > #define	IPV6_LEAVE_GROUP	IP_DROP_MEMBERSHIP
> >
> > So, both symbols are defined and to me it seems fine to drop their
> (conditional) definition from Net.c
> >
> Thanks for checking. Would you have time to check one more thing? As
> part of JDK-8236410 I want to improve the underlying
> join/drop/block/unblock so that we use the protocol independent
> MCAST_XXXX socket options where possible. I have an initial patch [1]
> that should be good enough to try if you have time. My guess is that
> USE_MCAST_XXXX should be defined on AIX. Also I suspect
> Net.canJoin6WithV4Group should return true. It has historically returned
> false on AIX which means that a DatagramChannel to an IPv6 socket cannot
> join IPv4 multicast groups. The spec allows tolerates this but it will
> become an issue in the future once legacy MulticastSocket is switched to
> use a DatagramChannel.
> 
> -Alan
> 
> [1] http://cr.openjdk.java.net/~alanb/8236410/webrev/