[tahoe-lafs-trac-stream] [Tahoe-LAFS] #867: use ipv6

[Tahoe-LAFS]

#867: use ipv6
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     Reporter:  warner   |      Owner:  ClashTheBunny
         Type:           |     Status:  assigned
  enhancement            |
     Priority:  major    |  Milestone:  undecided
    Component:  code-    |    Version:  1.5.0
  network                |   Keywords:  ipv6 firewall twisted foolscap
   Resolution:           |  test-needed
Launchpad Bug:           |
-------------------------+-------------------------------------------------

Comment (by warner):

 Good points. Twisted's endpoint language uses `tcp:` for IPv4-based TCP
 ports, and `tcp6:` for IPv6-based ones.. they didn't add a `tcp4:` for
 anything, which is a bit inconsistent, I guess. I kind of like the idea of
 redefining `tub.port=`'s `tcp:` to mean both, but I wonder if it'd be
 confusing, since then we can no longer claim it's exactly an Endpoint
 string.

 Oh also, maybe we should only do the dual-`tcp:`+`tcp6:` thing when we're
 automatically setting up the listener (with `tahoe create-node
 --hostname=ABC`). In other cases, let the user be explicit (which might
 mean that the `--port=` argument to `tahoe create-node` needs to accept
 multiple ports too.. maybe `tahoe create-node --port "tcp:1234 tcp6:1234"`
 ?).

 Also also, endpoint strings can include paths (to TLS certificates, and
 unix-domain sockets), and on a sufficiently ill-advised system, those
 might include spaces. So maybe whitespace as a delimiter isn't such a
 great idea after all.

 I thought of another use case where you might want multiple listening
 ports (listening on a public v4/v6 address *and* a Tor hidden-service's
 locally-forwarded port), except that in that case I think we decided the
 Tor/I2P listeners would be added independently, instead of being listen in
 `tub.port`.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/867#comment:36>
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