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Re: [tor-bugs] #34004 [Core Tor/Tor]: Support for full DNS and DNSSEC resolution

#34004: Support for full DNS and DNSSEC resolution
--------------------------+------------------------
 Reporter:  chrisss404    |          Owner:  (none)
     Type:  enhancement   |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:
 Severity:  Major         |     Resolution:
 Keywords:  DNS, DNSSEC   |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+------------------------

Comment (by chrisss404):

 I added the implementation here:
 https://github.com/torproject/tor/pull/1869

 For the DNS connections I introduced a new session group:
 SESSION_GROUP_DNS_LOOKUP
 https://github.com/torproject/tor/blob/153f81f340ea84bc5df7471b2d0a7bfbf3ad318c/src/core/or/or.h#L990

 Then I setup the connection as follows:
   dns_conn->entry_cfg.session_group = SESSION_GROUP_DNS_LOOKUP;
   dns_conn->entry_cfg.isolation_flags = ISO_DEFAULT;
   dns_conn->entry_cfg.ipv4_traffic = 1;
   dns_conn->entry_cfg.ipv6_traffic = 1;
   dns_conn->entry_cfg.dns_request = 0;
   dns_conn->entry_cfg.onion_traffic = 1;
   dns_conn->entry_cfg.use_cached_ipv4_answers = 0;
   dns_conn->entry_cfg.use_cached_ipv6_answers = 0;
 https://github.com/torproject/tor/blob/153f81f340ea84bc5df7471b2d0a7bfbf3ad318c/src/core/or/dns_resolver.c#L458

 Can you please help me to determine if this approach is prone to
 correlation attacks?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/34004#comment:2>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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