We're bumping the experiment's version number because we changed the name of the field used to contain late/duplicate DNS responses. We have also changed the algorithm to determine `#dnsDiff`. However, the change should only impact how we log this information. Overall, here the idea is to provide users with a reasonably clear explanation of how the probe maps observations to blocking and accessible using expected/unexpected as the conceptual framework.
Part of https://github.com/ooni/probe/issues/2237
This diff includes a rule to recover from the "measurement failed" state that kicks in when we have a chain of successful redirects from the client side leading to a webpage _and_ any URL in the chain uses HTTPS. See https://github.com/ooni/probe/issues/2307.
While there, fix `i/e/w/iox.go` to avoid triggering the `./script/nocopyreadall.bash` script.
This diff introduces a special rule to avoid emitting null, null when all the connects failed in both the probe and the TH.
While there, recognize that the subset of null, null we're hunting actually deals with websites that are down, so change the internal naming to reflect that and make the code easier to read/understand.
See https://github.com/ooni/probe/issues/2299
It's confusing to see
```
measuring additional addrs from TH: []
```
when actually nothing is going to be measured.
So, instead, let us log about the additional addrs
discovered by the TH instead, which is less confusing.
Part of https://github.com/ooni/probe/issues/2237
See https://github.com/ooni/probe/issues/2290
While there, notice that in such a case the priority selector would hang because of the WaitGroup, so get rid of the WaitGroup and accept that the priority selector is going to hang around for the whole duration of the measurement in some cases. The cancellable `measurer.go`'s context will cause the priority selector to eventually exit when we return from `measurer.go`'s `Run` method.
This diff changes the data format to prefer "udp" to "quic" everywhere we were previously using "quic".
Previously, the code inconsistently used "quic" for operations where we knew we were using "quic" and "udp" otherwise (e.g., for generic operations like ReadFrom).
While it would be more correct to say that a specific HTTP request used "quic" rather than "udp", using "udp" consistently allows one to see how distinct events such as ReadFrom and an handshake all refer to the same address, port, and protocol triple. Therefore, this change makes it easier to programmatically unpack a single measurement and create endpoint stats.
Before implementing this change, I discussed the problem with @hellais who mentioned that ooni/data is not currently using the "quic" string anywhere. I know that ooni/pipeline also doesn't rely on this string. The only users of this feature have been research-oriented experiments such as urlgetter, for which such a change would actually be acceptable.
See https://github.com/ooni/probe/issues/2238 and https://github.com/ooni/spec/pull/262.
Code based on urlgetter had this event and we would like to have this
event with step-by-step code as well.
Because there's no tracing for HTTP when using step-by-step, we will
need to include emitting these events inside the boilerplate.
By doing that, we emit events out of order, so make sure we sort
them by T, which is "the moment when the event was collected".
Part of https://github.com/ooni/probe/issues/2238
* fix(model/archival.go): more optional keys
Basically, `t0` and `transaction_id` should be optional. Version 0.4.x
of web_connectivity should not include them, version 0.5.x should.
There is a technical reason why v0.4.x should not include them. The code
it is based on, tracex, does not record these two fields.
Whereas, v0.5.x, uses measurexlite, which records these two fields.
Part of https://github.com/ooni/probe/issues/2238
* fix(webconnectivity@v0.5): add more fields
This diff adds the following fields to webconnectivity@v0.5:
1. agent, always set to "redirect" (legacy field);
2. client_resolver, properly initialized w/ the resolver's IPv4 address;
3. retries, legacy field always set to null;
4. socksproxy, legacy field always set to null.
Part of https://github.com/ooni/probe/issues/2238
* fix(webconnectivity@v0.5): register extensions
The general idea behind this field is that we would be able
in the future to tweak the data model for some fields, by declaring
we're using a later version, so it seems useful to add it.
See https://github.com/ooni/probe/issues/2238
* fix(measurexlite): use tcp or quic for tls handshake network
This diff fixes a bug where measurexlite was using "tls" as the
protocol for the TLS handshake when using TCP.
While this choice _could_ make sense, the rest of the code we have
written so far uses "tcp" instead.
Using "tcp" makes more sense because it allows you to search for
the same endpoint across different events by checking for the same
network and for the same endpoint rather than special casing TLS
handshakes for using "tls" when the endpoint is "tcp".
See https://github.com/ooni/probe/issues/2238
* chore: run alltests.yml for "alltestsbuild" branches
Part of https://github.com/ooni/probe/issues/2238
I've just branched off the `release/3.16` branch since we're
really looking good for release modulo minor changes.
Hence, it's time to update `master`'s version.
While working on https://github.com/ooni/probe/issues/2130, and specifically on the action item related to making sure all workflows are green, I was confronted with the complexity of the QA directory.
There's plenty of cleaning up and simplifying there. The original intent was to A/B test `miniooni` and `measurement_kit` to ensure they were behaving the same. We don't have this need anymore.
Rather, it seems the QA scripts have grown large and flaky, to the point that I am always tempted to ignore them. The underlying censorship engine, jafar, has also not been developed for quite some time.
So, the first step towards improve the QA infrastructure seems to be humble and acknowledge that we cannot realistically maintain these checks using jafar as a backend for so many experiments.
Let us focus on our most important experiment, Web Connectivity, and let us keep QA checks for it.
Additionally, let us simplify and cleanup QA as much as possible, though without introducing radical changes.
The end result is a QA for Web Connectivity that seems reasonable and runs in six minutes.
This diff modifies webconnectivity@v0.5 to take decisions regarding
TLS blocking by using the response from the TH rather than using
questionable heuristics based on inspecting the TLSHandshake list
alone. This change should improve correctness _when_ we're using
the improved TH, which is currently used for 50% of the probes.
See https://github.com/ooni/probe/issues/2257
While there, modify `control.go` to specify which control is being used.
As silly as it seems, emojis help _a lot_ when eyeballing logs
to quickly identify unexpected lines.
I'm doing this work as part of https://github.com/ooni/probe/issues/2257
While there, include integration testing to make sure the script
is working as intended before using it.
While there, edit maketarball.bash's comments.
The residual censorship algorithm prevents dnscheck for checking the
same endpoint again in a short time frame under the assumption that a
previous measurement could have caused residual censorship.
In https://github.com/ooni/probe/issues/2234, we mentioned we probably
wanted to disable this algorithm because we didn't want to slow down
dnscheck too much and because we didn't detect this alleged source of
blocking in our previous measurements.
It turns out the algorithm was already disabled. I probably did this
after we published the paper on DNS censorship to make measurements
overall a bit faster.
So, just introduce a new extension field to the measurement telling us
that the residual censorship algorithm is disabled.
It's not super useful except as for the fact that the next time I
read the source code I notice that the algorithm is disabled.
