This diff contains significant improvements over the previous
implementation of the torsf experiment.
We add support for configuring different rendezvous methods after
the convo at https://github.com/ooni/probe/issues/2004. In doing
that, I've tried to use a terminology that is consistent with the
names being actually used by tor developers.
In terms of what to do next, this diff basically instruments
torsf to always rendezvous using domain fronting. Yet, it's also
possible to change the rendezvous method from the command line,
when using miniooni, which allows to experiment a bit more. In the
same vein, by default we use a persistent tor datadir, but it's
also possible to use a temporary datadir using the cmdline.
Here's how a generic invocation of `torsf` looks like:
```bash
./miniooni -O DisablePersistentDatadir=true \
-O RendezvousMethod=amp \
-O DisableProgress=true \
torsf
```
(The default is `DisablePersistentDatadir=false` and
`RendezvousMethod=domain_fronting`.)
With this implementation, we can start measuring whether snowflake
and tor together can boostrap, which seems the most important thing
to focus on at the beginning. Understanding why the bootstrap most
often does not converge with a temporary datadir on Android devices
remains instead an open problem for now. (I'll also update the
relevant issues or create new issues after commit this.)
We also address some methodology improvements that were proposed
in https://github.com/ooni/probe/issues/1686. Namely:
1. we record the tor version;
2. we include the bootstrap percentage by reading the logs;
3. we set the anomaly key correctly;
4. we measure the bytes send and received (by `tor` not by `snowflake`, since
doing it for snowflake seems more complex at this stage).
What remains to be done is the possibility of including Snowflake
events into the measurement, which is not possible until the new
improvements at common/event in snowflake.git are included into a
tagged version of snowflake itself. (I'll make sure to mention
this aspect to @cohosh in https://github.com/ooni/probe/issues/2004.)
This commit message is the same across probe-cli, probe-desktop,
and probe-android. With the changes contained in the enclosed
diff, I'm starting to add support for torsf for android and for
desktop.
When smoke testing that torsf was WAI, I also noticed that its
progress messages in output are too frequent. We may want to do
better in a future version when we'll be able to read `tor`'s
output. In the meanwhile, make the progress messages less
frequent and indicated the maximum runtime inside of the messages
themselves. This improved message, albeit not so nice from the
UX PoV, should at least provide a clue that we're not stuck.
Reference issue: https://github.com/ooni/probe/issues/1917
Reference issue: https://github.com/ooni/probe/issues/1917.
I needed to change the summary key type returned by `torsf` to be a value. It seems the DB layer assumes that. If we pass it a pointer, it panics because it's experiment a value rather than a pointer 🤷.
This diff contains the following changes and enhancements:
1. upgrade snowflake to v2
2. observe that we were not changing defaults from outside of snowflake.go, so remove code allowing to do that;
3. bump the timeout to 600 seconds (it seems 300 was not always enough based on my testing);
4. add useful knob to disable `torsf` progress (it's really annoying on console, we should do something about this);
5. ptx.go: avoid printing an error when the connection has just been closed;
6. snowflake: test AMP cache, see that it's not working currently, so leave it disabled.
Related issues: https://github.com/ooni/probe/issues/1845, https://github.com/ooni/probe/issues/1894, and https://github.com/ooni/probe/issues/1917.
## Checklist
- [x] I have read the [contribution guidelines](https://github.com/ooni/probe-cli/blob/master/CONTRIBUTING.md)
- [x] reference issue for this pull request: https://github.com/ooni/probe/issues/1885
- [x] related ooni/spec pull request: N/A
Location of the issue tracker: https://github.com/ooni/probe
## Description
This PR contains a set of changes to move important interfaces and data types into the `./internal/model` package.
The criteria for including an interface or data type in here is roughly that the type should be important and used by several packages. We are especially interested to move more interfaces here to increase modularity.
An additional side effect is that, by reading this package, one should be able to understand more quickly how different parts of the codebase interact with each other.
This is what I want to move in `internal/model`:
- [x] most important interfaces from `internal/netxlite`
- [x] everything that was previously part of `internal/engine/model`
- [x] mocks from `internal/netxlite/mocks` should also be moved in here as a subpackage
The current implementation assumes the user has already installed tor
on the current system. If tor is not present, the experiment fails.
This is meant to be the first version of this experiment.
We are going to add more functionality in subsequent revisions of
this experiment, once we've collected more feedback.
Reference issue: https://github.com/ooni/probe/issues/1565.
Here's the spec PR: https://github.com/ooni/spec/pull/218.
Here's the issue tracking future work: https://github.com/ooni/probe/issues/1686
