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p2p/discover: implement v5.1 wire protocol (#21647)

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This change implements the Discovery v5.1 wire protocol and
also adds an interactive test suite for this protocol.
This commit is contained in:
Felix Lange
2020-10-14 12:28:17 +02:00
committed by GitHub
parent 4eb01b21c8
commit 524aaf5ec6
24 changed files with 3236 additions and 1427 deletions
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16
p2p/discover/v4_lookup_test.go
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@ -34,7 +34,7 @@ func TestUDPv4_Lookup(t *testing.T) {
test := newUDPTest(t)
// Lookup on empty table returns no nodes.
targetKey, _ := decodePubkey(crypto.S256(), lookupTestnet.target)
targetKey, _ := decodePubkey(crypto.S256(), lookupTestnet.target[:])
if results := test.udp.LookupPubkey(targetKey); len(results) > 0 {
t.Fatalf("lookup on empty table returned %d results: %#v", len(results), results)
}
@ -279,17 +279,21 @@ func (tn *preminedTestnet) nodesAtDistance(dist int) []v4wire.Node {
return result
}
func (tn *preminedTestnet) neighborsAtDistance(base *enode.Node, distance uint, elems int) []*enode.Node {
nodes := nodesByDistance{target: base.ID()}
func (tn *preminedTestnet) neighborsAtDistances(base *enode.Node, distances []uint, elems int) []*enode.Node {
var result []*enode.Node
for d := range lookupTestnet.dists {
for i := range lookupTestnet.dists[d] {
n := lookupTestnet.node(d, i)
if uint(enode.LogDist(n.ID(), base.ID())) == distance {
nodes.push(wrapNode(n), elems)
d := enode.LogDist(base.ID(), n.ID())
if containsUint(uint(d), distances) {
result = append(result, n)
if len(result) >= elems {
return result
}
}
}
}
return unwrapNodes(nodes.entries)
return result
}
func (tn *preminedTestnet) closest(n int) (nodes []*enode.Node) {