This change lets us use ChannelCodec to encode and decode any
restricted channel message type we want. (Later on, we'll turn the
related Codec class in tor-proto into a more type-restricted version
of this.)
* Provide an accessor for the HSDIR flag
* Provide a function for testing a relay for hsdir inclusion
* Provide an iterator on NetDir that returns the hsdirs
* Implement Netdir::compute_rings in terms of a new
HsDirRing::compute, that currently does nothing.
* Actually call Netdir::compute_rings (since now it doesn't panic).
* Make Netdir::compute_rings not be pub. We do this unconditionally,
rather than exposing the distinction between a netdir-without-hsdir
and a netdir-with-hsdir.
The file which contains this type is called hsdir_params.rs. We have
a general problem with slight confusion about when to includen "dir"
and when to include "ring".
Resolve this in favour of the rule now added to the module-level doc
comment.
These variables are going to be struct fields, which will sort of
enforce consistent naming. The struct fields are going to appear in a
moment. We'll call the fields "current" and "secondary" after the
naming in the test cases.
And import hsdir_params::HsRingParams, which we're going to make more
references to.
* Remove the return value, which was not used anywhere.
Also remove the code to calculate the return value.
* Take an Arc<NetDir> rather than a reference. We are going to want
this for HS support. This has no overall effect on the lifetime of
the4 Arc, which was owned at the one call site and then imediately
dropped.
* Change the documentation to explain what the function's role is in
the netdir API, rather than the fiddly details of what it actually
does internally. Relegate the latter to a code comment.
(When we have HS, this will do more, or, at least, make further
arrangements.)
Locally, the only functional effect is that now we refuse to handle
non-whole-number-of-minutes lengths - but since the consensus
parameter can't represent those, there's no overall functional change.
We need to make sure any `#[cfg(feature=...)]` attributes are
applied not only to our variant declarations, but also to the
branches in the match statements that deal with them.
Doing this will make it much easier to implement a macro that
generates restricted instances of the Msg types (for #525).
The Body change is a breaking change. I don't think anybody else
implements Body, but in theory they could.
Nick Mathewson
Ian Jackson
Ian Jackson
Dimitris Apostolou