[tor-bugs] #27491 [Core Tor/Tor]: Prefer IPv4 or IPv6 based on the number of failures

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#27491: Prefer IPv4 or IPv6 based on the number of failures
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 Reporter:  neel          |          Owner:  neel
     Type:  enhancement   |         Status:  assigned
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:  #17835        |         Points:
 Reviewer:                |        Sponsor:
--------------------------+--------------------------
Changes (by neel):

 * type:  defect => enhancement


Comment:

 I have a few questions:

 1. I believe I should modify `connection_or_connect_failed()`. Is this
 correct?

 2. In the above function, is an instant connection failure determined by
 the OR error `END_OR_CONN_REASON_NO_ROUTE`?

 I know that #27490 is not committed yet, but I am already planning this
 patch while I wait.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27491#comment:2>
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