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p2p/discover: add initial discovery v5 implementation (#20750)

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This adds an implementation of the current discovery v5 spec.

There is full integration with cmd/devp2p and enode.Iterator in this
version. In theory we could enable the new protocol as a replacement of
discovery v4 at any time. In practice, there will likely be a few more
changes to the spec and implementation before this can happen.
This commit is contained in:
Felix Lange
2020-04-08 09:57:23 +02:00
committed by GitHub
parent 671f22be38
commit b7394d7942
19 changed files with 2976 additions and 80 deletions
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2
p2p/discover/lookup.go
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@ -150,7 +150,7 @@ func (it *lookup) query(n *node, reply chan<- []*node) {
} else if len(r) == 0 {
fails++
it.tab.db.UpdateFindFails(n.ID(), n.IP(), fails)
it.tab.log.Trace("Findnode failed", "id", n.ID(), "failcount", fails, "err", err)
it.tab.log.Trace("Findnode failed", "id", n.ID(), "failcount", fails, "results", len(r), "err", err)
if fails >= maxFindnodeFailures {
it.tab.log.Trace("Too many findnode failures, dropping", "id", n.ID(), "failcount", fails)
it.tab.delete(n)