[tor-bugs] #33263 [Core Tor/Tor]: Prop 313: 4. Collecting IPv6 Consumed Bandwidth Statistics

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#33263: Prop 313: 4. Collecting IPv6 Consumed Bandwidth Statistics
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     Reporter:  teor            |      Owner:  teor
         Type:  enhancement     |     Status:  assigned
     Priority:  Medium          |  Milestone:  Tor: 0.4.4.x-final
    Component:  Core Tor/Tor    |    Version:
     Severity:  Normal          |   Keywords:  prop313, ipv6
Actual Points:                  |  Parent ID:  #33052
       Points:  1               |   Reviewer:
      Sponsor:  Sponsor55-must  |
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 We propose that relays (and bridges) collect IPv6 consumed bandwidth
 statistics.

 To minimise development and testing effort, we propose re-using the
 existing
 "bw_array" code in rephist.c.

 (We might want to move this code into separate relay-only code and header
 files, because it is relay-specific.)

 In particular, tor currently counts these bandwidth statistics:
   * read,
   * write,
   * dir_read, and
   * dir_write.

 We propose adding the following bandwidth statistics:
   * ipv6_read, and
   * ipv6_write.
 (The IPv4 statistics can be calculated by subtracting the IPv6 statistics
 from the existing total consumed bandwidth statistics.)

 We believe that collecting IPv6 consumed bandwidth statistics is about as
 safe as the existing IPv4+IPv6 total consumed bandwidth statistics.

 See proposal 313, section 4:
 https://gitweb.torproject.org/torspec.git/tree/proposals/313-relay-
 ipv6-stats.txt#n118

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33263>
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