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[tor-bugs] #33768 [Core Tor/Tor]: Make tor_inet_pton() handle bad addresses consistently on Windows



#33768: Make tor_inet_pton() handle bad addresses consistently on Windows
-------------------------+-------------------------------------------------
     Reporter:  teor     |      Owner:  (none)
         Type:  defect   |     Status:  new
     Priority:  Medium   |  Milestone:  Tor: 0.4.4.x-final
    Component:  Core     |    Version:
  Tor/Tor                |   Keywords:  044-should, security-low,
     Severity:  Normal   |  035-backport, 041-backport, 042-backport,
                         |  043-backport, outreachy-ipv6, ipv6, windows
Actual Points:           |  Parent ID:
       Points:  1        |   Reviewer:
      Sponsor:           |
  Sponsor55-can          |
-------------------------+-------------------------------------------------
 tor_inet_pton() handles bad addresses differently on Windows and
 Linux/macOS.

 For example, the address: "2000::1a00::1000:fc098" (two "::") fails this
 test on Windows, but succeeds on Linux and macOS:
 https://github.com/torproject/tor/pull/1831/commits/05f4f93722d46c0e8f1d09b4dea4bf5d1743d93f
 #diff-048243cd6d9ed36dda0944181d8ec8abR1729

 Let's fix this bug and backport it.

 In general, we should make all the functions in this file behave
 identically:
 * zero any out parameters at the start of the function
 * zero any out parameters on failure

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33768>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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