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Re: [tor-bugs] #23819 [Core Tor/Tor]: Support IPv6 link-local interface addresses



#23819: Support IPv6 link-local interface addresses
-----------------------------+------------------------------------
 Reporter:  Zakhar           |          Owner:  (none)
     Type:  enhancement      |         Status:  needs_revision
 Priority:  Medium           |      Milestone:  Tor: 0.3.3.x-final
Component:  Core Tor/Tor     |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  ipv6 link-local  |  Actual Points:  1
Parent ID:                   |         Points:  1
 Reviewer:                   |        Sponsor:
-----------------------------+------------------------------------

Comment (by Zakhar):

 Understood!

 So, since I'm apparently the first one looking into binding on ipv6 link-
 local addresses, and doing so in Ubuntu 16.04 which is non-rolling-release
 /no-new-feature for what concerns Tor, I'll keep the present incomplete
 0.2.9 patch for my own things, until I can provide a full patch on master.

 What I'll do next (after some holidays... and since it does not seem a lot
 of folk need binding ipv6!)
 - rebase on master (I have already checked the part I patched didn't
 change, it's only at a different place in address.c)
 - document on the %interface part (the explanation about "square brackets"
 was indeed added recently since it was not there in 0.2.9 where I checked)
 - complete the patch with the "printing" bit that is indeed missing
 - try to make it tor_local_addr_t or tor_non_routed_addr_t so that we
 don't propagate the scope_id to addresses that don't need it.


 Bullets 1 and 2 are quite trivial.
 Bullet 3 might take me some time to figure out from where the printing is
 done and how it is saving/restoring!
 Bullet 4 is all another story... and indeed you probably won't like un-
 maintanable hacks like using zones not meant for that to store what we
 need. I'll look into the "proposal" process, people might come with nice
 suggestions to handle these "local/non-routed" addresses.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23819#comment:8>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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