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Description of problem:
when you are in a channel and you look at the list of users it does a reverse resolution of the names of the hosts that you are connecting from for IPv4 addresses. For example on one channel that I'm on:
~grondo.dsl.speakeasy.net
however if you connect via an IPv6 address then this doesn't work:
~ben@2001:470:1f0f:417:226:c6ff:fea1:c1c8
the problem is not that the resolution fails, the reverse DNS works:
[ben@localhost rhel6]$ host 2001:470:1f0f:417:226:c6ff:fea1:c1c8
8.c.1.c.1.a.e.f.f.f.6.c.6.2.2.0.7.1.4.0.f.0.f.1.0.7.4.0.1.0.0.2.ip6.arpa domain name pointer snog.bencoyote.net.
[ben@localhost rhel6]$ dig -x 2001:470:1f0f:417:226:c6ff:fea1:c1c8
; <<>> DiG 9.7.0-P2-RedHat-9.7.0-5.P2.el6_0.1 <<>> -x 2001:470:1f0f:417:226:c6ff:fea1:c1c8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56960
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 9
;; QUESTION SECTION:
;8.c.1.c.1.a.e.f.f.f.6.c.6.2.2.0.7.1.4.0.f.0.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR
;; ANSWER SECTION:
8.c.1.c.1.a.e.f.f.f.6.c.6.2.2.0.7.1.4.0.f.0.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 86086 IN PTR snog.bencoyote.net.
;; AUTHORITY SECTION:
0.7.4.0.1.0.0.2.ip6.arpa. 10486 IN NS ns2.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10486 IN NS ns3.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10486 IN NS ns4.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10486 IN NS ns5.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10486 IN NS ns1.he.net.
;; ADDITIONAL SECTION:
ns1.he.net. 63432 IN A 216.218.130.2
ns2.he.net. 63432 IN A 216.218.131.2
ns2.he.net. 63432 IN AAAA 2001:470:200::2
ns3.he.net. 63432 IN A 216.218.132.2
ns3.he.net. 63432 IN AAAA 2001:470:300::2
ns4.he.net. 63432 IN A 216.66.1.2
ns4.he.net. 63432 IN AAAA 2001:470:400::2
ns5.he.net. 63432 IN A 216.66.80.18
ns5.he.net. 63432 IN AAAA 2001:470:500::2
;; Query time: 92 msec
;; SERVER: 10.7.142.20#53(10.7.142.20)
;; WHEN: Tue Jan 25 12:37:01 2011
;; MSG SIZE rcvd: 407
The problem seems to be that xchat doesn't bother to do the reverse lookup.
Version-Release number of selected component (if applicable):
xchat-2.8.8-1.el6.x86_64
How reproducible:
Use xchat across an IPV6 net connected to an IPV6 enabled irc server.
Actual results:
reverse resolution fails
Expected results:
reverse resolution succeeds
Additional info: