Hi Volker, The reason the mcast_set_if_by_if_v4(env, this, fd, value); probably fails is that the socket that we are trying to set the IPPROTO_IP, IP_MULTICAST_IF options on has been created with the AF_INET6 family, and these options may not be valid.
The socket is setup with the AF_INET6 family because ipv6_available() returns true, as the AIX system does support INET6/IPv6. It is just that the interface we are using doesnt have an INET6 address associated with it. I am checking with the AIX/C compiler team in IBM to see if this a bug or not. Thanks Steve Groeger IBM Runtime Technologies Hursley, Winchester Tel: (44) 1962 816911 Mobex: 279990 Mobile: 07718 517 129 Fax (44) 1962 816800 Lotus Notes: Steve Groeger/UK/IBM Internet: groe...@uk.ibm.com Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU From: Volker Simonis <volker.simo...@gmail.com> To: Steve Groeger <groe...@uk.ibm.com> Cc: Chris Hegarty <chris.hega...@oracle.com>, net-dev <net-dev@openjdk.java.net>, ppc-aix-port-...@openjdk.java.net Date: 14/01/2019 14:11 Subject: Re: 8207404: MulticastSocket tests failing on Aix On Mon, Jan 14, 2019 at 2:19 PM Steve Groeger <groe...@uk.ibm.com> wrote: > > Hi Chris / Volker, > > I had already tried doing the same as is done for Linux, ie calling this first > > mcast_set_if_by_if_v4(env, this, fd, value); > > This still fails for some reason with EADDRNOTAVAIL. Finding this out is probably the main challenge in order to solve this issue and one of the reason why we asked IBM for assistance :) I suppose there must be a possibility to set a socket option for an IPv4 socket on AIX even if IPv6 is enabled. Otherwise this is probably an AIX problem/bug which should be fixed there (where, again, we need assistance from IBM). The man-page ( https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_71/apis/ssocko.htm) mentions the following: IP_MULTICAST_IF: et interface over which outgoing multicast datagrams should be sent. This option is only supported for sockets with an address family of AF_INET and type of SOCK_DGRAM or SOCK_RAW. Maybe the interface is erroneously in the AF_INET6 family? The man-page only mentions the following for EADDRNOTAVAIL: EADDRNOTAVAIL: Address not available. For the IP_ADD_MEMBERSHIP or IP_DROP_MEMBERSHIP operations, this error code indicates that an incorrect address was specified for either the imr_multiaddr or imr_interface parameter value. > This error gets cleared by the > > if ((*env)->ExceptionCheck(env)){ > (*env)->ExceptionClear(env); > } > > as ipv6_available() still returns true, but we then still try and call > > mcast_set_if_by_if_v6(env, this, fd, value); > > which again fails with EADDRNOTAVAIL. So we have the same result. > > Thanks > Steve Groeger > IBM Runtime Technologies > Hursley, Winchester > Tel: (44) 1962 816911 Mobex: 279990 Mobile: 07718 517 129 > Fax (44) 1962 816800 > Lotus Notes: Steve Groeger/UK/IBM > Internet: groe...@uk.ibm.com > > Unless stated otherwise above: > IBM United Kingdom Limited - Registered in England and Wales with number 741598. > Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU > > > > From: Chris Hegarty <chris.hega...@oracle.com> > To: Volker Simonis <volker.simo...@gmail.com> > Cc: Steve Groeger <groe...@uk.ibm.com>, ppc-aix-port-...@openjdk.java.net, net-dev <net-dev@openjdk.java.net> > Date: 12/01/2019 14:21 > Subject: Re: 8207404: MulticastSocket tests failing on Aix > ________________________________ > > > > > > > On 11 Jan 2019, at 17:28, Volker Simonis <volker.simo...@gmail.com> wrote: > > > > I think the difference is in setMulticastInterface() in > > PlainDatagramSocketImpl.c > > > > #ifdef __linux__ > > mcast_set_if_by_if_v4(env, this, fd, value); > > if (ipv6_available()) { > > if ((*env)->ExceptionCheck(env)){ > > (*env)->ExceptionClear(env); > > } > > mcast_set_if_by_if_v6(env, this, fd, value); > > } > > #else /* __linux__ not defined */ > > if (ipv6_available()) { > > mcast_set_if_by_if_v6(env, this, fd, value); > > } else { > > mcast_set_if_by_if_v4(env, this, fd, value); > > } > > #endif /* __linux__ */ > > > > We should probably follow the Linux way for AIX as well. > > I agree. > > -Chris. > > >> On Fri, Jan 11, 2019 at 5:29 PM Chris Hegarty <chris.hega...@oracle.com> wrote: > >> > >> > >>> On 09/01/2019 15:20, Steve Groeger wrote: > >>> ... > >>> > >>> I think I have an Linux system setup with a simarly configured interface > >>> (system has IPv6 configured but interface > >>> has no IPv6/INET6 address configured) but the test works fine when run > >>> on that system. > >> > >> This is what I observe too. Confirmed by looking at the test > >> output in the jtr file. > >> > >>> This was why I was asking the question on whether this should work on > >>> AIX, or whether it should fail on Linux!!! > >> > >> I suspect that this is an issue with the native setsockopt > >> on AIX. That said, if it cannot be resolved on AIX, then > >> maybe the networking native code on AIX, should workaround > >> it. > >> > >> -Chris. > > > > > Unless stated otherwise above: > IBM United Kingdom Limited - Registered in England and Wales with number 741598. > Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU
