Date: Thu, 28 Aug 2008 15:46:52 +0200 From: Marcin Cieslak <saper@system.pl> To: freebsd-java@freebsd.org Subject: Re: FreeBSD Java, IPv6, and DNS SRV query type Message-ID: <48B6AC4C.1050006@system.pl> In-Reply-To: <48B29CB7.9010907@cs.vu.nl> References: <48B29CB7.9010907@cs.vu.nl>
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Benno Overeinder wrote:
> Hi,
>
> Sometimes you just want it all: Java, IPv6, *and* DNS SRV query type
> requests. Well, why? We run an Openfire Jabber/XMPP server and want to
> run this service with IPv6 support.
>
> So what is the situation. With the Diablo Caffe/Latte package, IPv6
> support is not enabled. (I don't know why, maybe someone can shed a
> light on this?)
>
> To get Java with IPv6 support, we installed jdk15 (and later jdk16)
> using ports (java/jdk15 and java/jdk16). During installation process we
> enabled IPv6 in the configuration.
>
> All set and go, and IPv6 worked with our Java programs, including the
> Openfire server.
>
> However, DNS SRV _xmpp-server._tcp.domain.name resolution fails with the
> ports java/jdk16 build. (Consequently, only Jabber servers that are
> running on hosts known by their DNS domain name are found.) For
> example, contacts with a Google Talk account are not found.
I don't know what's wrong with your code (it gives me the same results)
but I tried a small jython program:
import java
from javax.naming import Context
from javax.naming.directory import InitialDirContext
env = java.util.Hashtable()
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.dns.DnsContextFactory")
ictx = InitialDirContext(env)
print ictx.getAttributes("_xmpp-server._tcp.google.com", ["SRV"])
the result:
{srv=SRV: 20 0 5269 xmpp-server3.l.google.com., 20 0 5269
xmpp-server4.l.google.com., 5 0 5269 xmpp-server.l.google.com., 20 0
5269 xmpp-server1.l.google.com., 20 0 5269 xmpp-server2.l.google.com.}
The funny part begins when I enter IPv6 DNS server address
(I run one on my LAN) in /etc/resolv.conf (say, "2001:DB8::1"). But this
is a known bug:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5042453
--Marcin
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