[tor-bugs] #33679 [Core Tor/Tor]: Make sure every address function that takes for_listening supports IPv6

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#33679: Make sure every address function that takes for_listening supports IPv6
-------------------------------------------+-------------------------------
 Reporter:  teor                           |          Owner:  MrSquanchee
     Type:  task                           |         Status:
                                           |  needs_revision
 Priority:  Medium                         |      Milestone:  Tor:
                                           |  0.4.4.x-final
Component:  Core Tor/Tor                   |        Version:
 Severity:  Normal                         |     Resolution:
 Keywords:  prop312, ipv6, outreachy-ipv6  |  Actual Points:
Parent ID:  #33049                         |         Points:  0.5
 Reviewer:                                 |        Sponsor:
                                           |  Sponsor55-must
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Comment (by MrSquanchee):

 Hii teor,
 I want you to look at this,
 Either tor_addr_is_null() is failing (which I don't see any reason to) or
 tor_inet_pton() is.

 Have a look at my updated PR[https://github.com/torproject/tor/pull/1831].

 I have added the required tests.
 And I didn't see any reasons to change tor_port_is_valid().
 However I refactored tor_addr_is_valid_ipv4n() and I don't see any reason
 to make a
 similar function for ipv6 as it will only be checking whether it's null or
 not
 and that could be done via tor_is_valid().

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33679#comment:4>
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