[tor-bugs] #10856 [Tor]: Tor SOCKS proxy fails to reject unsupported IP formats.

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#10856: Tor SOCKS proxy fails to reject unsupported IP formats.
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     Reporter:  oc      |      Owner:
         Type:  defect  |     Status:  new
     Priority:  normal  |  Milestone:
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:
Actual Points:          |  Parent ID:
       Points:          |
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Comment (by oc):

 Replying to [comment:6 cypherpunks]:
 > {{{
 > The server, hostport, hostname,
 >    domainlabel, toplabel, and alphanum rules have been removed.
 > }}}
 Sure, because RFC3986 does not mandate a particular registered name lookup
 technology (DNS, host tables, yellow pages, NetInfo, WINS…) and therefore
 does not restrict the syntax of `reg-name` anymore.
 Note that these RFCs are about URIs, which we do not care about here (my
 point was only to present a well-defined grammar).

 If we're looking for an authoritative RFC for host domain names, I guess
 it's [http://tools.ietf.org/html/rfc1123#section-2 RFC1123]. It states
 that, although host names may start with a digit, domain names must not:
 "a valid host name can never have the dotted-decimal form #.#.#.#, since
 ''at least the highest-level component label will be alphabetic''".

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10856#comment:7>
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