On Wednesday, September 03, 2014 06:39:53 AM Craig Rodrigues wrote: > On Wed, Sep 3, 2014 at 5:19 AM, Andrey V. Elsukov <a...@freebsd.org> wrote: > > On 03.09.2014 14:05, bugzilla-nore...@freebsd.org wrote: > > > > Hi, > > > > you said that this code works in linux. I looked in the linux kernel > > source, and I think it should return EINVAL too. > > > > net/ipv6/mcast.c:ipv6_sock_mc_join: > > 154 if (!ipv6_addr_is_multicast(addr)) > > 155 return -EINVAL; > > The code does work in Linux. However, you need to look at the > JDK source, not the Linux kernel source. > > In this file: > http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/9b8c96f96a0f/src/solaris/nativ > e/java/net/PlainDatagramSocketImpl.c > > in the mcast_join_leave() function, there are two code paths: (1) > Linux, (2) Solaris. > > It looks like on Solaris, they support IPv4-mapped multicast addresses for > IPV6, and things work when they create an IPv6 socket, and then put an > IPv4-mapped multicast address in it. For Linux, they have specific > code paths in that function which seem to force creating an IPv4 > socket.
>From looking at the source, it doesn't look like the Linux workaround (using IP_ADD_MEMBERSHIP on an AF_INET6 socket) will work on FreeBSD. I'm not sure how hard it would be to fix in6_mcast.c to support IPv4 groups. bms@ might know. -- John Baldwin _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
