[tor-bugs] #16053 [- Select a component]: Stem errors when it sees reject6 or accept6 exit policies

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#16053: Stem errors when it sees reject6 or accept6 exit policies
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 Reporter:  atagar                |          Owner:
     Type:  defect                |         Status:  new
 Priority:  normal                |      Milestone:
Component:  - Select a component  |        Version:
 Keywords:                        |  Actual Points:
Parent ID:                        |         Points:
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 Tor has a couple [https://www.torproject.org/docs/tor-
 manual.html.en#ExitPolicy exit policy keywords] (reject6 and accept6)
 which break just about any bit of Stem that reads exit policies.

 {{{
 10:55 < toralf> atagar: "ExitPolicy reject6 *:*" raises in
 controller.get_exit_policy() : ValueError: An exit policy should have
 a space separating its accept/reject from the exit pattern: reject6
 *:*

 11:07 < atagar> toralf: Interesting! I keep an eye on changes to the
 control and directory specifications but this didn't include a change
 to either so 'reject6' is a surprise for me. Joy, guess this'll
 warrant a hotfix for the recent 1.4.0 release.

 11:07 < atagar> Thanks for the heads up. :P
 }}}

 Definitely something we should fix. Nyx evidently had a longstanding issue
 around this too (#10579). Not an overly big whoop though. First, they're
 extremely rare and second, unless I'm missing something they're pointless.
 Exit policy addresses fall into three camps...

 * **wildcard** (for instance 'accept *:80')
 * **ipv4** (for instance 'accept 0.0.0.0/8:80')
 * **ipv6** (for instance 'accept
 [0000:0000:0000:0000:0000:0000:0000:0000]/64:80')

 The first camp (**wildcards**) match against ipv4 or ipv6. The later two
 are for ipv4-only or ipv6-only policy rules. Or at least that's how Stem
 treats it.

 Unless I'm missing something reject6 is just an alias for... what? The man
 page entry added as part of #12878 is the only description it seems to
 have ever gotten, and personally can't say I'm finding it too
 illuminating.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16053>
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