test: fix intermittent failure in rpc_setban.py --v2transport, run it in CI

[mzumsande]

This test failed for me on master locally:
The reason is that when initiating a v2 connection and being immediately disconnected, a node cannot know if the disconnect happens because the peer only supports v1, or because it has banned you, so it schedules to reconnect with v1. If the test doesn't wait for that, the reconnect can happen at a bad time, resulting in failure in a later connect_nodes call.
Also add the test with --v2transport to the test runner because banning with v2 seems like a useful thing to have test coverage for.

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Type	Reviewers
ACK	delta1, stratospher, achow101
Concept ACK	epiccurious

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Conflicts

Reviewers, this pull request conflicts with the following ones:

• #26863 (test: merge banning test from p2p_disconnect_ban to rpc_setban by brunoerg)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

[delta1]

tested ACK cc87ee4

[stratospher]

tested ACK cc87ee4. nice find!

[edilmedeiros]

I don't think this is something to stall a merge, but I could not make the test fail in master. I tried with different loads in my machine from other work.

How are you calling it?

❯ python test/functional/rpc_setban.py
2024-02-05T17:48:04.516000Z TestFramework (INFO): PRNG seed is: 2620849867157253531
2024-02-05T17:48:04.517000Z TestFramework (INFO): Initializing test directory /var/folders/pk/trlzyy614z11wn_y1t8vhsz80000gn/T/bitcoin_func_test_tqvcwu8u
2024-02-05T17:48:06.209000Z TestFramework (INFO): Test that a non-IP address can be banned/unbanned
2024-02-05T17:48:06.210000Z TestFramework (INFO): Test the ban list is preserved through restart
2024-02-05T17:48:06.890000Z TestFramework (INFO): Test -bantime
2024-02-05T17:48:07.369000Z TestFramework (INFO): Stopping nodes
2024-02-05T17:48:07.477000Z TestFramework (INFO): Cleaning up /var/folders/pk/trlzyy614z11wn_y1t8vhsz80000gn/T/bitcoin_func_test_tqvcwu8u on exit
2024-02-05T17:48:07.477000Z TestFramework (INFO): Tests successful

[mzumsande]

I could not make the test fail in master

❯ python test/functional/rpc_setban.py

You have to call it with v2, see PR title: rpc_setban.py --v2transport.

[edilmedeiros]

I'm sorry for not being clear in my comment.
I tried that with your code, and it runs something that passes (see below).

My point is that running rpc_setban.py in 5b8c597 does not seem to fail in any way in my box.
The mentioned commit passed the CI tests.
I understand I'm a newcomer, and I'm trying to learn how the tests work by reproducing the error you found instead of just reading the code in the PR.

Yet, I don't see this as a problem to merge.
It might be an issue triggered by some specificity in your box, but not mine.

❯ python test/functional/rpc_setban.py
2024-02-05T18:36:28.549000Z TestFramework (INFO): PRNG seed is: 7243494276342072324
2024-02-05T18:36:28.550000Z TestFramework (INFO): Initializing test directory /var/folders/pk/trlzyy614z11wn_y1t8vhsz80000gn/T/bitcoin_func_test_w4vk2rv2
2024-02-05T18:36:30.718000Z TestFramework (INFO): Test that a non-IP address can be banned/unbanned
2024-02-05T18:36:30.719000Z TestFramework (INFO): Test the ban list is preserved through restart
2024-02-05T18:36:31.403000Z TestFramework (INFO): Test -bantime
2024-02-05T18:36:31.882000Z TestFramework (INFO): Stopping nodes
2024-02-05T18:36:31.993000Z TestFramework (INFO): Cleaning up /var/folders/pk/trlzyy614z11wn_y1t8vhsz80000gn/T/bitcoin_func_test_w4vk2rv2 on exit
2024-02-05T18:36:31.993000Z TestFramework (INFO): Tests successful

❯ python test/functional/rpc_setban.py --v2transport
2024-02-05T18:36:38.617000Z TestFramework (INFO): PRNG seed is: 3082398001401933771
2024-02-05T18:36:38.618000Z TestFramework (INFO): Initializing test directory /var/folders/pk/trlzyy614z11wn_y1t8vhsz80000gn/T/bitcoin_func_test_lj9gxqtg
2024-02-05T18:36:41.687000Z TestFramework (INFO): Test that a non-IP address can be banned/unbanned
2024-02-05T18:36:41.688000Z TestFramework (INFO): Test the ban list is preserved through restart
2024-02-05T18:36:42.371000Z TestFramework (INFO): Test -bantime
2024-02-05T18:36:42.850000Z TestFramework (INFO): Stopping nodes
2024-02-05T18:36:42.961000Z TestFramework (INFO): Cleaning up /var/folders/pk/trlzyy614z11wn_y1t8vhsz80000gn/T/bitcoin_func_test_lj9gxqtg on exit
2024-02-05T18:36:42.961000Z TestFramework (INFO): Tests successful

[epiccurious]

Concept ACK cc87ee4.

[achow101]

ACK cc87ee4