go-ethereum/cmd/devp2p/internal/v5test
Csaba Kiraly c453b99a57
cmd/devp2p/internal/v5test: fix hive test for discv5 findnode results (#34043)
This fixes the remaining Hive discv5/FindnodeResults failures in the
cmd/devp2p/internal/v5test fixture.

The issue was in the simulator-side bystander behavior, not in
production discovery logic. The existing fixture could get bystanders
inserted into the remote table, but under current geth behavior they
were not stable enough to remain valid FINDNODE results. In
particular, the fixture still had a few protocol/behavior mismatches:

- incomplete WHOAREYOU recovery
- replies not consistently following the UDP envelope source
- incorrect endpoint echoing in PONG
- fixture-originated PING using the wrong ENR sequence
- bystanders answering background FINDNODE with empty NODES

That last point was important because current lookup accounting can
treat repeatedly unhelpful FINDNODE interactions as failures. As a
result, a bystander could become live via PING/PONG and still later be
dropped from the table before the final FindnodeResults assertion.
This change updates the fixture so that bystanders behave more like
stable discv5 peers:

- perform one explicit initial handshake, then switch to passive response handling
- resend the exact challenged packet when handling WHOAREYOU
- reply to the actual UDP packet source and mirror that source in PONG.ToIP / PONG.ToPort
- use the bystander’s own ENR sequence in fixture-originated PING
- prefill each bystander with the bystander ENR set and answer FINDNODE from that set

The result is that the fixture now forms a small self-consistent lookup
environment instead of a set of peers that are live but systematically
poor lookup participants.
2026-04-14 12:15:39 +02:00
..
discv5tests.go cmd/devp2p/internal/v5test: fix hive test for discv5 findnode results (#34043) 2026-04-14 12:15:39 +02:00
framework.go cmd/devp2p/internal/v5test: fix hive test for discv5 findnode results (#34043) 2026-04-14 12:15:39 +02:00