[tor-bugs] #10468 [Tor]: Make DnsPort, IPv6, and AutomapHostsOnResolve work tother.

[Tor Bug Tracker & Wiki]

#10468: Make DnsPort, IPv6, and AutomapHostsOnResolve work tother.
-------------------------------------------------+-------------------------
 Reporter:  nickm                                |          Owner:
     Type:  defect                               |         Status:  new
 Priority:  normal                               |      Milestone:  Tor:
Component:  Tor                                  |  0.2.5.x-final
 Keywords:  tor-client 024-backport automap dns  |        Version:
  ipv6                                           |  Actual Points:
Parent ID:                                       |         Points:
-------------------------------------------------+-------------------------
 From #10465: I started Tor with "./src/or/tor -dnsport '9999
 preferipv6automap' -automaphostsonresolve 1 -automaphostssuffix . "

 Then I did:
 {{{
 [619]$ dig @localhost -p 9999 aaaa www.torproject.org

 ; <<>> DiG 9.8.3-P1 <<>> @localhost -p 9999 aaaa www.torproject.org
 ; (3 servers found)
 ;; global options: +cmd
 ;; Got answer:
 ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45384
 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

 ;; QUESTION SECTION:
 ;www.torproject.org.            IN      AAAA

 ;; ANSWER SECTION:
 www.torproject.org.     60      IN      A       127.237.144.204

 ;; Query time: 0 msec
 ;; SERVER: 127.0.0.1#9999(127.0.0.1)
 ;; WHEN: Sun Dec 22 09:19:54 2013
 ;; MSG SIZE  rcvd: 52
 }}}
 and
 {{{
 [621]$ dig @localhost -p 9999 example.com

 ; <<>> DiG 9.8.3-P1 <<>> @localhost -p 9999 example.com
 ; (3 servers found)
 ;; global options: +cmd
 ;; Got answer:
 ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18398
 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

 ;; QUESTION SECTION:
 ;example.com.                   IN      A

 ;; ANSWER SECTION:
 example.com.            60      IN      A       127.201.101.133

 ;; Query time: 0 msec
 ;; SERVER: 127.0.0.1#9999(127.0.0.1)
 ;; WHEN: Sun Dec 22 09:20:31 2013
 ;; MSG SIZE  rcvd: 45
 }}}

 It seems to be sending A even if it was asked for an AAAA.

 (There are deeper DNSPort+IPv6 issues going on, of course, but this part
 is probably easier, and it's an independently useful bit of
 functionality.)

 See #10465 notes for more

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10468>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online