350a87dd3c
This change implements EIP-868. The UDPv4 transport announces support for the extension in ping/pong and handles enrRequest messages. There are two uses of the extension: If a remote node announces support for EIP-868 in their pong, node revalidation pulls the node's record. The Resolve method requests the record unconditionally.
221 lines
8.6 KiB
Go
221 lines
8.6 KiB
Go
// Copyright 2019 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package discover
|
|
|
|
import (
|
|
"crypto/ecdsa"
|
|
"fmt"
|
|
"net"
|
|
"reflect"
|
|
"sort"
|
|
"testing"
|
|
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/p2p/enode"
|
|
)
|
|
|
|
func TestUDPv4_Lookup(t *testing.T) {
|
|
t.Parallel()
|
|
test := newUDPTest(t)
|
|
|
|
// Lookup on empty table returns no nodes.
|
|
targetKey, _ := decodePubkey(lookupTestnet.target)
|
|
if results := test.udp.LookupPubkey(targetKey); len(results) > 0 {
|
|
t.Fatalf("lookup on empty table returned %d results: %#v", len(results), results)
|
|
}
|
|
|
|
// Seed table with initial node.
|
|
fillTable(test.table, []*node{wrapNode(lookupTestnet.node(256, 0))})
|
|
|
|
// Start the lookup.
|
|
resultC := make(chan []*enode.Node, 1)
|
|
go func() {
|
|
resultC <- test.udp.LookupPubkey(targetKey)
|
|
test.close()
|
|
}()
|
|
|
|
// Answer lookup packets.
|
|
for done := false; !done; {
|
|
done = test.waitPacketOut(func(p packetV4, to *net.UDPAddr, hash []byte) {
|
|
n, key := lookupTestnet.nodeByAddr(to)
|
|
switch p.(type) {
|
|
case *pingV4:
|
|
test.packetInFrom(nil, key, to, &pongV4{Expiration: futureExp, ReplyTok: hash})
|
|
case *findnodeV4:
|
|
dist := enode.LogDist(n.ID(), lookupTestnet.target.id())
|
|
nodes := lookupTestnet.nodesAtDistance(dist - 1)
|
|
test.packetInFrom(nil, key, to, &neighborsV4{Expiration: futureExp, Nodes: nodes})
|
|
}
|
|
})
|
|
}
|
|
|
|
// Verify result nodes.
|
|
results := <-resultC
|
|
t.Logf("results:")
|
|
for _, e := range results {
|
|
t.Logf(" ld=%d, %x", enode.LogDist(lookupTestnet.target.id(), e.ID()), e.ID().Bytes())
|
|
}
|
|
if len(results) != bucketSize {
|
|
t.Errorf("wrong number of results: got %d, want %d", len(results), bucketSize)
|
|
}
|
|
if hasDuplicates(wrapNodes(results)) {
|
|
t.Errorf("result set contains duplicate entries")
|
|
}
|
|
if !sortedByDistanceTo(lookupTestnet.target.id(), wrapNodes(results)) {
|
|
t.Errorf("result set not sorted by distance to target")
|
|
}
|
|
if !reflect.DeepEqual(results, lookupTestnet.closest(bucketSize)) {
|
|
t.Errorf("results aren't the closest %d nodes", bucketSize)
|
|
}
|
|
}
|
|
|
|
// This is the test network for the Lookup test.
|
|
// The nodes were obtained by running lookupTestnet.mine with a random NodeID as target.
|
|
var lookupTestnet = &preminedTestnet{
|
|
target: hexEncPubkey("5d485bdcbe9bc89314a10ae9231e429d33853e3a8fa2af39f5f827370a2e4185e344ace5d16237491dad41f278f1d3785210d29ace76cd627b9147ee340b1125"),
|
|
dists: [257][]*ecdsa.PrivateKey{
|
|
251: {
|
|
hexEncPrivkey("29738ba0c1a4397d6a65f292eee07f02df8e58d41594ba2be3cf84ce0fc58169"),
|
|
hexEncPrivkey("511b1686e4e58a917f7f848e9bf5539d206a68f5ad6b54b552c2399fe7d174ae"),
|
|
hexEncPrivkey("d09e5eaeec0fd596236faed210e55ef45112409a5aa7f3276d26646080dcfaeb"),
|
|
hexEncPrivkey("c1e20dbbf0d530e50573bd0a260b32ec15eb9190032b4633d44834afc8afe578"),
|
|
hexEncPrivkey("ed5f38f5702d92d306143e5d9154fb21819777da39af325ea359f453d179e80b"),
|
|
},
|
|
252: {
|
|
hexEncPrivkey("1c9b1cafbec00848d2c174b858219914b42a7d5c9359b1ca03fd650e8239ae94"),
|
|
hexEncPrivkey("e0e1e8db4a6f13c1ffdd3e96b72fa7012293ced187c9dcdcb9ba2af37a46fa10"),
|
|
hexEncPrivkey("3d53823e0a0295cb09f3e11d16c1b44d07dd37cec6f739b8df3a590189fe9fb9"),
|
|
},
|
|
253: {
|
|
hexEncPrivkey("2d0511ae9bf590166597eeab86b6f27b1ab761761eaea8965487b162f8703847"),
|
|
hexEncPrivkey("6cfbd7b8503073fc3dbdb746a7c672571648d3bd15197ccf7f7fef3d904f53a2"),
|
|
hexEncPrivkey("a30599b12827b69120633f15b98a7f6bc9fc2e9a0fd6ae2ebb767c0e64d743ab"),
|
|
hexEncPrivkey("14a98db9b46a831d67eff29f3b85b1b485bb12ae9796aea98d91be3dc78d8a91"),
|
|
hexEncPrivkey("2369ff1fc1ff8ca7d20b17e2673adc3365c3674377f21c5d9dafaff21fe12e24"),
|
|
hexEncPrivkey("9ae91101d6b5048607f41ec0f690ef5d09507928aded2410aabd9237aa2727d7"),
|
|
hexEncPrivkey("05e3c59090a3fd1ae697c09c574a36fcf9bedd0afa8fe3946f21117319ca4973"),
|
|
hexEncPrivkey("06f31c5ea632658f718a91a1b1b9ae4b7549d7b3bc61cbc2be5f4a439039f3ad"),
|
|
},
|
|
254: {
|
|
hexEncPrivkey("dec742079ec00ff4ec1284d7905bc3de2366f67a0769431fd16f80fd68c58a7c"),
|
|
hexEncPrivkey("ff02c8861fa12fbd129d2a95ea663492ef9c1e51de19dcfbbfe1c59894a28d2b"),
|
|
hexEncPrivkey("4dded9e4eefcbce4262be4fd9e8a773670ab0b5f448f286ec97dfc8cf681444a"),
|
|
hexEncPrivkey("750d931e2a8baa2c9268cb46b7cd851f4198018bed22f4dceb09dd334a2395f6"),
|
|
hexEncPrivkey("ce1435a956a98ffec484cd11489c4f165cf1606819ab6b521cee440f0c677e9e"),
|
|
hexEncPrivkey("996e7f8d1638be92d7328b4770f47e5420fc4bafecb4324fd33b1f5d9f403a75"),
|
|
hexEncPrivkey("ebdc44e77a6cc0eb622e58cf3bb903c3da4c91ca75b447b0168505d8fc308b9c"),
|
|
hexEncPrivkey("46bd1eddcf6431bea66fc19ebc45df191c1c7d6ed552dcdc7392885009c322f0"),
|
|
},
|
|
255: {
|
|
hexEncPrivkey("da8645f90826e57228d9ea72aff84500060ad111a5d62e4af831ed8e4b5acfb8"),
|
|
hexEncPrivkey("3c944c5d9af51d4c1d43f5d0f3a1a7ef65d5e82744d669b58b5fed242941a566"),
|
|
hexEncPrivkey("5ebcde76f1d579eebf6e43b0ffe9157e65ffaa391175d5b9aa988f47df3e33da"),
|
|
hexEncPrivkey("97f78253a7d1d796e4eaabce721febcc4550dd68fb11cc818378ba807a2cb7de"),
|
|
hexEncPrivkey("a38cd7dc9b4079d1c0406afd0fdb1165c285f2c44f946eca96fc67772c988c7d"),
|
|
hexEncPrivkey("d64cbb3ffdf712c372b7a22a176308ef8f91861398d5dbaf326fd89c6eaeef1c"),
|
|
hexEncPrivkey("d269609743ef29d6446e3355ec647e38d919c82a4eb5837e442efd7f4218944f"),
|
|
hexEncPrivkey("d8f7bcc4a530efde1d143717007179e0d9ace405ddaaf151c4d863753b7fd64c"),
|
|
},
|
|
256: {
|
|
hexEncPrivkey("8c5b422155d33ea8e9d46f71d1ad3e7b24cb40051413ffa1a81cff613d243ba9"),
|
|
hexEncPrivkey("937b1af801def4e8f5a3a8bd225a8bcff1db764e41d3e177f2e9376e8dd87233"),
|
|
hexEncPrivkey("120260dce739b6f71f171da6f65bc361b5fad51db74cf02d3e973347819a6518"),
|
|
hexEncPrivkey("1fa56cf25d4b46c2bf94e82355aa631717b63190785ac6bae545a88aadc304a9"),
|
|
hexEncPrivkey("3c38c503c0376f9b4adcbe935d5f4b890391741c764f61b03cd4d0d42deae002"),
|
|
hexEncPrivkey("3a54af3e9fa162bc8623cdf3e5d9b70bf30ade1d54cc3abea8659aba6cff471f"),
|
|
hexEncPrivkey("6799a02ea1999aefdcbcc4d3ff9544478be7365a328d0d0f37c26bd95ade0cda"),
|
|
hexEncPrivkey("e24a7bc9051058f918646b0f6e3d16884b2a55a15553b89bab910d55ebc36116"),
|
|
},
|
|
},
|
|
}
|
|
|
|
type preminedTestnet struct {
|
|
target encPubkey
|
|
dists [hashBits + 1][]*ecdsa.PrivateKey
|
|
}
|
|
|
|
func (tn *preminedTestnet) node(dist, index int) *enode.Node {
|
|
key := tn.dists[dist][index]
|
|
ip := net.IP{127, byte(dist >> 8), byte(dist), byte(index)}
|
|
return enode.NewV4(&key.PublicKey, ip, 0, 5000)
|
|
}
|
|
|
|
func (tn *preminedTestnet) nodeByAddr(addr *net.UDPAddr) (*enode.Node, *ecdsa.PrivateKey) {
|
|
dist := int(addr.IP[1])<<8 + int(addr.IP[2])
|
|
index := int(addr.IP[3])
|
|
key := tn.dists[dist][index]
|
|
return tn.node(dist, index), key
|
|
}
|
|
|
|
func (tn *preminedTestnet) nodesAtDistance(dist int) []rpcNode {
|
|
result := make([]rpcNode, len(tn.dists[dist]))
|
|
for i := range result {
|
|
result[i] = nodeToRPC(wrapNode(tn.node(dist, i)))
|
|
}
|
|
return result
|
|
}
|
|
|
|
func (tn *preminedTestnet) closest(n int) (nodes []*enode.Node) {
|
|
for d := range tn.dists {
|
|
for i := range tn.dists[d] {
|
|
nodes = append(nodes, tn.node(d, i))
|
|
}
|
|
}
|
|
sort.Slice(nodes, func(i, j int) bool {
|
|
return enode.DistCmp(tn.target.id(), nodes[i].ID(), nodes[j].ID()) < 0
|
|
})
|
|
return nodes[:n]
|
|
}
|
|
|
|
var _ = (*preminedTestnet).mine // avoid linter warning about mine being dead code.
|
|
|
|
// mine generates a testnet struct literal with nodes at
|
|
// various distances to the network's target.
|
|
func (tn *preminedTestnet) mine() {
|
|
// Clear existing slices first (useful when re-mining).
|
|
for i := range tn.dists {
|
|
tn.dists[i] = nil
|
|
}
|
|
|
|
targetSha := tn.target.id()
|
|
found, need := 0, 40
|
|
for found < need {
|
|
k := newkey()
|
|
ld := enode.LogDist(targetSha, encodePubkey(&k.PublicKey).id())
|
|
if len(tn.dists[ld]) < 8 {
|
|
tn.dists[ld] = append(tn.dists[ld], k)
|
|
found++
|
|
fmt.Printf("found ID with ld %d (%d/%d)\n", ld, found, need)
|
|
}
|
|
}
|
|
fmt.Printf("&preminedTestnet{\n")
|
|
fmt.Printf(" target: hexEncPubkey(\"%x\"),\n", tn.target[:])
|
|
fmt.Printf(" dists: [%d][]*ecdsa.PrivateKey{\n", len(tn.dists))
|
|
for ld, ns := range tn.dists {
|
|
if len(ns) == 0 {
|
|
continue
|
|
}
|
|
fmt.Printf(" %d: {\n", ld)
|
|
for _, key := range ns {
|
|
fmt.Printf(" hexEncPrivkey(\"%x\"),\n", crypto.FromECDSA(key))
|
|
}
|
|
fmt.Printf(" },\n")
|
|
}
|
|
fmt.Printf(" },\n")
|
|
fmt.Printf("}\n")
|
|
}
|