forked from cerc-io/plugeth
1359 lines
49 KiB
Go
1359 lines
49 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package downloader
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"math/big"
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"os"
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"strings"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/protocols/eth"
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"github.com/ethereum/go-ethereum/eth/protocols/snap"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/trie"
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)
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// downloadTester is a test simulator for mocking out local block chain.
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type downloadTester struct {
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freezer string
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chain *core.BlockChain
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downloader *Downloader
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peers map[string]*downloadTesterPeer
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lock sync.RWMutex
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}
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// newTester creates a new downloader test mocker.
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func newTester() *downloadTester {
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freezer, err := ioutil.TempDir("", "")
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if err != nil {
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panic(err)
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}
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db, err := rawdb.NewDatabaseWithFreezer(rawdb.NewMemoryDatabase(), freezer, "", false)
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if err != nil {
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panic(err)
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}
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core.GenesisBlockForTesting(db, testAddress, big.NewInt(1000000000000000))
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chain, err := core.NewBlockChain(db, nil, params.TestChainConfig, ethash.NewFaker(), vm.Config{}, nil, nil)
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if err != nil {
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panic(err)
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}
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tester := &downloadTester{
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freezer: freezer,
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chain: chain,
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peers: make(map[string]*downloadTesterPeer),
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}
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tester.downloader = New(0, db, trie.NewSyncBloom(1, db), new(event.TypeMux), tester.chain, nil, tester.dropPeer)
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return tester
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}
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// terminate aborts any operations on the embedded downloader and releases all
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// held resources.
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func (dl *downloadTester) terminate() {
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dl.downloader.Terminate()
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dl.chain.Stop()
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os.RemoveAll(dl.freezer)
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}
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// sync starts synchronizing with a remote peer, blocking until it completes.
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func (dl *downloadTester) sync(id string, td *big.Int, mode SyncMode) error {
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head := dl.peers[id].chain.CurrentBlock()
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if td == nil {
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// If no particular TD was requested, load from the peer's blockchain
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td = dl.peers[id].chain.GetTd(head.Hash(), head.NumberU64())
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}
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// Synchronise with the chosen peer and ensure proper cleanup afterwards
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err := dl.downloader.synchronise(id, head.Hash(), td, mode)
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select {
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case <-dl.downloader.cancelCh:
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// Ok, downloader fully cancelled after sync cycle
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default:
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// Downloader is still accepting packets, can block a peer up
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panic("downloader active post sync cycle") // panic will be caught by tester
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}
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return err
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}
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// newPeer registers a new block download source into the downloader.
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func (dl *downloadTester) newPeer(id string, version uint, blocks []*types.Block) *downloadTesterPeer {
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dl.lock.Lock()
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defer dl.lock.Unlock()
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peer := &downloadTesterPeer{
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dl: dl,
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id: id,
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chain: newTestBlockchain(blocks),
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withholdHeaders: make(map[common.Hash]struct{}),
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}
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dl.peers[id] = peer
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if err := dl.downloader.RegisterPeer(id, version, peer); err != nil {
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panic(err)
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}
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if err := dl.downloader.SnapSyncer.Register(peer); err != nil {
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panic(err)
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}
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return peer
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}
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// dropPeer simulates a hard peer removal from the connection pool.
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func (dl *downloadTester) dropPeer(id string) {
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dl.lock.Lock()
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defer dl.lock.Unlock()
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delete(dl.peers, id)
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dl.downloader.SnapSyncer.Unregister(id)
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dl.downloader.UnregisterPeer(id)
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}
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type downloadTesterPeer struct {
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dl *downloadTester
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id string
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chain *core.BlockChain
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withholdHeaders map[common.Hash]struct{}
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}
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// Head constructs a function to retrieve a peer's current head hash
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// and total difficulty.
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func (dlp *downloadTesterPeer) Head() (common.Hash, *big.Int) {
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head := dlp.chain.CurrentBlock()
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return head.Hash(), dlp.chain.GetTd(head.Hash(), head.NumberU64())
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}
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// RequestHeadersByHash constructs a GetBlockHeaders function based on a hashed
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// origin; associated with a particular peer in the download tester. The returned
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// function can be used to retrieve batches of headers from the particular peer.
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func (dlp *downloadTesterPeer) RequestHeadersByHash(origin common.Hash, amount int, skip int, reverse bool, sink chan *eth.Response) (*eth.Request, error) {
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// Service the header query via the live handler code
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headers := eth.ServiceGetBlockHeadersQuery(dlp.chain, ð.GetBlockHeadersPacket{
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Origin: eth.HashOrNumber{
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Hash: origin,
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},
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Amount: uint64(amount),
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Skip: uint64(skip),
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Reverse: reverse,
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}, nil)
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// If a malicious peer is simulated withholding headers, delete them
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for hash := range dlp.withholdHeaders {
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for i, header := range headers {
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if header.Hash() == hash {
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headers = append(headers[:i], headers[i+1:]...)
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break
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}
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}
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}
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hashes := make([]common.Hash, len(headers))
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for i, header := range headers {
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hashes[i] = header.Hash()
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}
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// Deliver the headers to the downloader
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req := ð.Request{
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Peer: dlp.id,
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}
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res := ð.Response{
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Req: req,
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Res: (*eth.BlockHeadersPacket)(&headers),
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Meta: hashes,
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Time: 1,
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Done: make(chan error, 1), // Ignore the returned status
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}
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go func() {
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sink <- res
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}()
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return req, nil
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}
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// RequestHeadersByNumber constructs a GetBlockHeaders function based on a numbered
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// origin; associated with a particular peer in the download tester. The returned
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// function can be used to retrieve batches of headers from the particular peer.
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func (dlp *downloadTesterPeer) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool, sink chan *eth.Response) (*eth.Request, error) {
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// Service the header query via the live handler code
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headers := eth.ServiceGetBlockHeadersQuery(dlp.chain, ð.GetBlockHeadersPacket{
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Origin: eth.HashOrNumber{
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Number: origin,
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},
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Amount: uint64(amount),
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Skip: uint64(skip),
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Reverse: reverse,
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}, nil)
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// If a malicious peer is simulated withholding headers, delete them
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for hash := range dlp.withholdHeaders {
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for i, header := range headers {
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if header.Hash() == hash {
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headers = append(headers[:i], headers[i+1:]...)
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break
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}
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}
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}
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hashes := make([]common.Hash, len(headers))
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for i, header := range headers {
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hashes[i] = header.Hash()
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}
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// Deliver the headers to the downloader
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req := ð.Request{
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Peer: dlp.id,
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}
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res := ð.Response{
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Req: req,
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Res: (*eth.BlockHeadersPacket)(&headers),
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Meta: hashes,
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Time: 1,
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Done: make(chan error, 1), // Ignore the returned status
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}
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go func() {
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sink <- res
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}()
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return req, nil
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}
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// RequestBodies constructs a getBlockBodies method associated with a particular
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// peer in the download tester. The returned function can be used to retrieve
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// batches of block bodies from the particularly requested peer.
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func (dlp *downloadTesterPeer) RequestBodies(hashes []common.Hash, sink chan *eth.Response) (*eth.Request, error) {
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blobs := eth.ServiceGetBlockBodiesQuery(dlp.chain, hashes)
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bodies := make([]*eth.BlockBody, len(blobs))
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for i, blob := range blobs {
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bodies[i] = new(eth.BlockBody)
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rlp.DecodeBytes(blob, bodies[i])
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}
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var (
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txsHashes = make([]common.Hash, len(bodies))
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uncleHashes = make([]common.Hash, len(bodies))
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)
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hasher := trie.NewStackTrie(nil)
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for i, body := range bodies {
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txsHashes[i] = types.DeriveSha(types.Transactions(body.Transactions), hasher)
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uncleHashes[i] = types.CalcUncleHash(body.Uncles)
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}
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req := ð.Request{
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Peer: dlp.id,
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}
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res := ð.Response{
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Req: req,
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Res: (*eth.BlockBodiesPacket)(&bodies),
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Meta: [][]common.Hash{txsHashes, uncleHashes},
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Time: 1,
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Done: make(chan error, 1), // Ignore the returned status
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}
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go func() {
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sink <- res
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}()
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return req, nil
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}
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// RequestReceipts constructs a getReceipts method associated with a particular
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// peer in the download tester. The returned function can be used to retrieve
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// batches of block receipts from the particularly requested peer.
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func (dlp *downloadTesterPeer) RequestReceipts(hashes []common.Hash, sink chan *eth.Response) (*eth.Request, error) {
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blobs := eth.ServiceGetReceiptsQuery(dlp.chain, hashes)
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receipts := make([][]*types.Receipt, len(blobs))
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for i, blob := range blobs {
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rlp.DecodeBytes(blob, &receipts[i])
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}
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hasher := trie.NewStackTrie(nil)
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hashes = make([]common.Hash, len(receipts))
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for i, receipt := range receipts {
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hashes[i] = types.DeriveSha(types.Receipts(receipt), hasher)
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}
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req := ð.Request{
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Peer: dlp.id,
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}
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res := ð.Response{
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Req: req,
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Res: (*eth.ReceiptsPacket)(&receipts),
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Meta: hashes,
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Time: 1,
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Done: make(chan error, 1), // Ignore the returned status
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}
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go func() {
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sink <- res
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}()
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return req, nil
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}
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// ID retrieves the peer's unique identifier.
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func (dlp *downloadTesterPeer) ID() string {
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return dlp.id
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}
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// RequestAccountRange fetches a batch of accounts rooted in a specific account
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// trie, starting with the origin.
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func (dlp *downloadTesterPeer) RequestAccountRange(id uint64, root, origin, limit common.Hash, bytes uint64) error {
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// Create the request and service it
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req := &snap.GetAccountRangePacket{
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ID: id,
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Root: root,
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Origin: origin,
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Limit: limit,
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Bytes: bytes,
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}
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slimaccs, proofs := snap.ServiceGetAccountRangeQuery(dlp.chain, req)
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// We need to convert to non-slim format, delegate to the packet code
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res := &snap.AccountRangePacket{
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ID: id,
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Accounts: slimaccs,
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Proof: proofs,
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}
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hashes, accounts, _ := res.Unpack()
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go dlp.dl.downloader.SnapSyncer.OnAccounts(dlp, id, hashes, accounts, proofs)
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return nil
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}
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// RequestStorageRanges fetches a batch of storage slots belonging to one or
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// more accounts. If slots from only one accout is requested, an origin marker
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// may also be used to retrieve from there.
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func (dlp *downloadTesterPeer) RequestStorageRanges(id uint64, root common.Hash, accounts []common.Hash, origin, limit []byte, bytes uint64) error {
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// Create the request and service it
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req := &snap.GetStorageRangesPacket{
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ID: id,
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Accounts: accounts,
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Root: root,
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Origin: origin,
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Limit: limit,
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Bytes: bytes,
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}
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storage, proofs := snap.ServiceGetStorageRangesQuery(dlp.chain, req)
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// We need to convert to demultiplex, delegate to the packet code
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res := &snap.StorageRangesPacket{
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ID: id,
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Slots: storage,
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Proof: proofs,
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}
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hashes, slots := res.Unpack()
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go dlp.dl.downloader.SnapSyncer.OnStorage(dlp, id, hashes, slots, proofs)
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return nil
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}
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// RequestByteCodes fetches a batch of bytecodes by hash.
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func (dlp *downloadTesterPeer) RequestByteCodes(id uint64, hashes []common.Hash, bytes uint64) error {
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req := &snap.GetByteCodesPacket{
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ID: id,
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Hashes: hashes,
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Bytes: bytes,
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}
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codes := snap.ServiceGetByteCodesQuery(dlp.chain, req)
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go dlp.dl.downloader.SnapSyncer.OnByteCodes(dlp, id, codes)
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return nil
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}
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// RequestTrieNodes fetches a batch of account or storage trie nodes rooted in
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// a specificstate trie.
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func (dlp *downloadTesterPeer) RequestTrieNodes(id uint64, root common.Hash, paths []snap.TrieNodePathSet, bytes uint64) error {
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req := &snap.GetTrieNodesPacket{
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ID: id,
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Root: root,
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Paths: paths,
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Bytes: bytes,
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}
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nodes, _ := snap.ServiceGetTrieNodesQuery(dlp.chain, req, time.Now())
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go dlp.dl.downloader.SnapSyncer.OnTrieNodes(dlp, id, nodes)
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return nil
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}
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// Log retrieves the peer's own contextual logger.
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func (dlp *downloadTesterPeer) Log() log.Logger {
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return log.New("peer", dlp.id)
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}
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// assertOwnChain checks if the local chain contains the correct number of items
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// of the various chain components.
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func assertOwnChain(t *testing.T, tester *downloadTester, length int) {
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// Mark this method as a helper to report errors at callsite, not in here
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t.Helper()
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headers, blocks, receipts := length, length, length
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if tester.downloader.getMode() == LightSync {
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blocks, receipts = 1, 1
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}
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if hs := int(tester.chain.CurrentHeader().Number.Uint64()) + 1; hs != headers {
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t.Fatalf("synchronised headers mismatch: have %v, want %v", hs, headers)
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}
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if bs := int(tester.chain.CurrentBlock().NumberU64()) + 1; bs != blocks {
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t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, blocks)
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}
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if rs := int(tester.chain.CurrentFastBlock().NumberU64()) + 1; rs != receipts {
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t.Fatalf("synchronised receipts mismatch: have %v, want %v", rs, receipts)
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}
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}
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func TestCanonicalSynchronisation66Full(t *testing.T) { testCanonSync(t, eth.ETH66, FullSync) }
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func TestCanonicalSynchronisation66Snap(t *testing.T) { testCanonSync(t, eth.ETH66, SnapSync) }
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func TestCanonicalSynchronisation66Light(t *testing.T) { testCanonSync(t, eth.ETH66, LightSync) }
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func testCanonSync(t *testing.T, protocol uint, mode SyncMode) {
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tester := newTester()
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defer tester.terminate()
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// Create a small enough block chain to download
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chain := testChainBase.shorten(blockCacheMaxItems - 15)
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tester.newPeer("peer", protocol, chain.blocks[1:])
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// Synchronise with the peer and make sure all relevant data was retrieved
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if err := tester.sync("peer", nil, mode); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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assertOwnChain(t, tester, len(chain.blocks))
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}
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// Tests that if a large batch of blocks are being downloaded, it is throttled
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// until the cached blocks are retrieved.
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func TestThrottling66Full(t *testing.T) { testThrottling(t, eth.ETH66, FullSync) }
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func TestThrottling66Snap(t *testing.T) { testThrottling(t, eth.ETH66, SnapSync) }
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func testThrottling(t *testing.T, protocol uint, mode SyncMode) {
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tester := newTester()
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defer tester.terminate()
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// Create a long block chain to download and the tester
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targetBlocks := len(testChainBase.blocks) - 1
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tester.newPeer("peer", protocol, testChainBase.blocks[1:])
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// Wrap the importer to allow stepping
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blocked, proceed := uint32(0), make(chan struct{})
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tester.downloader.chainInsertHook = func(results []*fetchResult) {
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atomic.StoreUint32(&blocked, uint32(len(results)))
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<-proceed
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}
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// Start a synchronisation concurrently
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errc := make(chan error, 1)
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go func() {
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errc <- tester.sync("peer", nil, mode)
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}()
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// Iteratively take some blocks, always checking the retrieval count
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for {
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// Check the retrieval count synchronously (! reason for this ugly block)
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tester.lock.RLock()
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retrieved := int(tester.chain.CurrentFastBlock().Number().Uint64()) + 1
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tester.lock.RUnlock()
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if retrieved >= targetBlocks+1 {
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break
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}
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// Wait a bit for sync to throttle itself
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var cached, frozen int
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for start := time.Now(); time.Since(start) < 3*time.Second; {
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time.Sleep(25 * time.Millisecond)
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tester.lock.Lock()
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tester.downloader.queue.lock.Lock()
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tester.downloader.queue.resultCache.lock.Lock()
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{
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cached = tester.downloader.queue.resultCache.countCompleted()
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frozen = int(atomic.LoadUint32(&blocked))
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|
retrieved = int(tester.chain.CurrentFastBlock().Number().Uint64()) + 1
|
|
}
|
|
tester.downloader.queue.resultCache.lock.Unlock()
|
|
tester.downloader.queue.lock.Unlock()
|
|
tester.lock.Unlock()
|
|
|
|
if cached == blockCacheMaxItems ||
|
|
cached == blockCacheMaxItems-reorgProtHeaderDelay ||
|
|
retrieved+cached+frozen == targetBlocks+1 ||
|
|
retrieved+cached+frozen == targetBlocks+1-reorgProtHeaderDelay {
|
|
break
|
|
}
|
|
}
|
|
// Make sure we filled up the cache, then exhaust it
|
|
time.Sleep(25 * time.Millisecond) // give it a chance to screw up
|
|
tester.lock.RLock()
|
|
retrieved = int(tester.chain.CurrentFastBlock().Number().Uint64()) + 1
|
|
tester.lock.RUnlock()
|
|
if cached != blockCacheMaxItems && cached != blockCacheMaxItems-reorgProtHeaderDelay && retrieved+cached+frozen != targetBlocks+1 && retrieved+cached+frozen != targetBlocks+1-reorgProtHeaderDelay {
|
|
t.Fatalf("block count mismatch: have %v, want %v (owned %v, blocked %v, target %v)", cached, blockCacheMaxItems, retrieved, frozen, targetBlocks+1)
|
|
}
|
|
// Permit the blocked blocks to import
|
|
if atomic.LoadUint32(&blocked) > 0 {
|
|
atomic.StoreUint32(&blocked, uint32(0))
|
|
proceed <- struct{}{}
|
|
}
|
|
}
|
|
// Check that we haven't pulled more blocks than available
|
|
assertOwnChain(t, tester, targetBlocks+1)
|
|
if err := <-errc; err != nil {
|
|
t.Fatalf("block synchronization failed: %v", err)
|
|
}
|
|
}
|
|
|
|
// Tests that simple synchronization against a forked chain works correctly. In
|
|
// this test common ancestor lookup should *not* be short circuited, and a full
|
|
// binary search should be executed.
|
|
func TestForkedSync66Full(t *testing.T) { testForkedSync(t, eth.ETH66, FullSync) }
|
|
func TestForkedSync66Snap(t *testing.T) { testForkedSync(t, eth.ETH66, SnapSync) }
|
|
func TestForkedSync66Light(t *testing.T) { testForkedSync(t, eth.ETH66, LightSync) }
|
|
|
|
func testForkedSync(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chainA := testChainForkLightA.shorten(len(testChainBase.blocks) + 80)
|
|
chainB := testChainForkLightB.shorten(len(testChainBase.blocks) + 81)
|
|
tester.newPeer("fork A", protocol, chainA.blocks[1:])
|
|
tester.newPeer("fork B", protocol, chainB.blocks[1:])
|
|
// Synchronise with the peer and make sure all blocks were retrieved
|
|
if err := tester.sync("fork A", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chainA.blocks))
|
|
|
|
// Synchronise with the second peer and make sure that fork is pulled too
|
|
if err := tester.sync("fork B", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chainB.blocks))
|
|
}
|
|
|
|
// Tests that synchronising against a much shorter but much heavyer fork works
|
|
// corrently and is not dropped.
|
|
func TestHeavyForkedSync66Full(t *testing.T) { testHeavyForkedSync(t, eth.ETH66, FullSync) }
|
|
func TestHeavyForkedSync66Snap(t *testing.T) { testHeavyForkedSync(t, eth.ETH66, SnapSync) }
|
|
func TestHeavyForkedSync66Light(t *testing.T) { testHeavyForkedSync(t, eth.ETH66, LightSync) }
|
|
|
|
func testHeavyForkedSync(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chainA := testChainForkLightA.shorten(len(testChainBase.blocks) + 80)
|
|
chainB := testChainForkHeavy.shorten(len(testChainBase.blocks) + 79)
|
|
tester.newPeer("light", protocol, chainA.blocks[1:])
|
|
tester.newPeer("heavy", protocol, chainB.blocks[1:])
|
|
|
|
// Synchronise with the peer and make sure all blocks were retrieved
|
|
if err := tester.sync("light", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chainA.blocks))
|
|
|
|
// Synchronise with the second peer and make sure that fork is pulled too
|
|
if err := tester.sync("heavy", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chainB.blocks))
|
|
}
|
|
|
|
// Tests that chain forks are contained within a certain interval of the current
|
|
// chain head, ensuring that malicious peers cannot waste resources by feeding
|
|
// long dead chains.
|
|
func TestBoundedForkedSync66Full(t *testing.T) { testBoundedForkedSync(t, eth.ETH66, FullSync) }
|
|
func TestBoundedForkedSync66Snap(t *testing.T) { testBoundedForkedSync(t, eth.ETH66, SnapSync) }
|
|
func TestBoundedForkedSync66Light(t *testing.T) { testBoundedForkedSync(t, eth.ETH66, LightSync) }
|
|
|
|
func testBoundedForkedSync(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chainA := testChainForkLightA
|
|
chainB := testChainForkLightB
|
|
tester.newPeer("original", protocol, chainA.blocks[1:])
|
|
tester.newPeer("rewriter", protocol, chainB.blocks[1:])
|
|
|
|
// Synchronise with the peer and make sure all blocks were retrieved
|
|
if err := tester.sync("original", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chainA.blocks))
|
|
|
|
// Synchronise with the second peer and ensure that the fork is rejected to being too old
|
|
if err := tester.sync("rewriter", nil, mode); err != errInvalidAncestor {
|
|
t.Fatalf("sync failure mismatch: have %v, want %v", err, errInvalidAncestor)
|
|
}
|
|
}
|
|
|
|
// Tests that chain forks are contained within a certain interval of the current
|
|
// chain head for short but heavy forks too. These are a bit special because they
|
|
// take different ancestor lookup paths.
|
|
func TestBoundedHeavyForkedSync66Full(t *testing.T) {
|
|
testBoundedHeavyForkedSync(t, eth.ETH66, FullSync)
|
|
}
|
|
func TestBoundedHeavyForkedSync66Snap(t *testing.T) {
|
|
testBoundedHeavyForkedSync(t, eth.ETH66, SnapSync)
|
|
}
|
|
func TestBoundedHeavyForkedSync66Light(t *testing.T) {
|
|
testBoundedHeavyForkedSync(t, eth.ETH66, LightSync)
|
|
}
|
|
|
|
func testBoundedHeavyForkedSync(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
// Create a long enough forked chain
|
|
chainA := testChainForkLightA
|
|
chainB := testChainForkHeavy
|
|
tester.newPeer("original", protocol, chainA.blocks[1:])
|
|
|
|
// Synchronise with the peer and make sure all blocks were retrieved
|
|
if err := tester.sync("original", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chainA.blocks))
|
|
|
|
tester.newPeer("heavy-rewriter", protocol, chainB.blocks[1:])
|
|
// Synchronise with the second peer and ensure that the fork is rejected to being too old
|
|
if err := tester.sync("heavy-rewriter", nil, mode); err != errInvalidAncestor {
|
|
t.Fatalf("sync failure mismatch: have %v, want %v", err, errInvalidAncestor)
|
|
}
|
|
}
|
|
|
|
// Tests that a canceled download wipes all previously accumulated state.
|
|
func TestCancel66Full(t *testing.T) { testCancel(t, eth.ETH66, FullSync) }
|
|
func TestCancel66Snap(t *testing.T) { testCancel(t, eth.ETH66, SnapSync) }
|
|
func TestCancel66Light(t *testing.T) { testCancel(t, eth.ETH66, LightSync) }
|
|
|
|
func testCancel(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chain := testChainBase.shorten(MaxHeaderFetch)
|
|
tester.newPeer("peer", protocol, chain.blocks[1:])
|
|
|
|
// Make sure canceling works with a pristine downloader
|
|
tester.downloader.Cancel()
|
|
if !tester.downloader.queue.Idle() {
|
|
t.Errorf("download queue not idle")
|
|
}
|
|
// Synchronise with the peer, but cancel afterwards
|
|
if err := tester.sync("peer", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
tester.downloader.Cancel()
|
|
if !tester.downloader.queue.Idle() {
|
|
t.Errorf("download queue not idle")
|
|
}
|
|
}
|
|
|
|
// Tests that synchronisation from multiple peers works as intended (multi thread sanity test).
|
|
func TestMultiSynchronisation66Full(t *testing.T) { testMultiSynchronisation(t, eth.ETH66, FullSync) }
|
|
func TestMultiSynchronisation66Snap(t *testing.T) { testMultiSynchronisation(t, eth.ETH66, SnapSync) }
|
|
func TestMultiSynchronisation66Light(t *testing.T) { testMultiSynchronisation(t, eth.ETH66, LightSync) }
|
|
|
|
func testMultiSynchronisation(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
// Create various peers with various parts of the chain
|
|
targetPeers := 8
|
|
chain := testChainBase.shorten(targetPeers * 100)
|
|
|
|
for i := 0; i < targetPeers; i++ {
|
|
id := fmt.Sprintf("peer #%d", i)
|
|
tester.newPeer(id, protocol, chain.shorten(len(chain.blocks) / (i + 1)).blocks[1:])
|
|
}
|
|
if err := tester.sync("peer #0", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chain.blocks))
|
|
}
|
|
|
|
// Tests that synchronisations behave well in multi-version protocol environments
|
|
// and not wreak havoc on other nodes in the network.
|
|
func TestMultiProtoSynchronisation66Full(t *testing.T) { testMultiProtoSync(t, eth.ETH66, FullSync) }
|
|
func TestMultiProtoSynchronisation66Snap(t *testing.T) { testMultiProtoSync(t, eth.ETH66, SnapSync) }
|
|
func TestMultiProtoSynchronisation66Light(t *testing.T) { testMultiProtoSync(t, eth.ETH66, LightSync) }
|
|
|
|
func testMultiProtoSync(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
// Create a small enough block chain to download
|
|
chain := testChainBase.shorten(blockCacheMaxItems - 15)
|
|
|
|
// Create peers of every type
|
|
tester.newPeer("peer 66", eth.ETH66, chain.blocks[1:])
|
|
//tester.newPeer("peer 65", eth.ETH67, chain.blocks[1:)
|
|
|
|
// Synchronise with the requested peer and make sure all blocks were retrieved
|
|
if err := tester.sync(fmt.Sprintf("peer %d", protocol), nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chain.blocks))
|
|
|
|
// Check that no peers have been dropped off
|
|
for _, version := range []int{66} {
|
|
peer := fmt.Sprintf("peer %d", version)
|
|
if _, ok := tester.peers[peer]; !ok {
|
|
t.Errorf("%s dropped", peer)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Tests that if a block is empty (e.g. header only), no body request should be
|
|
// made, and instead the header should be assembled into a whole block in itself.
|
|
func TestEmptyShortCircuit66Full(t *testing.T) { testEmptyShortCircuit(t, eth.ETH66, FullSync) }
|
|
func TestEmptyShortCircuit66Snap(t *testing.T) { testEmptyShortCircuit(t, eth.ETH66, SnapSync) }
|
|
func TestEmptyShortCircuit66Light(t *testing.T) { testEmptyShortCircuit(t, eth.ETH66, LightSync) }
|
|
|
|
func testEmptyShortCircuit(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
// Create a block chain to download
|
|
chain := testChainBase
|
|
tester.newPeer("peer", protocol, chain.blocks[1:])
|
|
|
|
// Instrument the downloader to signal body requests
|
|
bodiesHave, receiptsHave := int32(0), int32(0)
|
|
tester.downloader.bodyFetchHook = func(headers []*types.Header) {
|
|
atomic.AddInt32(&bodiesHave, int32(len(headers)))
|
|
}
|
|
tester.downloader.receiptFetchHook = func(headers []*types.Header) {
|
|
atomic.AddInt32(&receiptsHave, int32(len(headers)))
|
|
}
|
|
// Synchronise with the peer and make sure all blocks were retrieved
|
|
if err := tester.sync("peer", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chain.blocks))
|
|
|
|
// Validate the number of block bodies that should have been requested
|
|
bodiesNeeded, receiptsNeeded := 0, 0
|
|
for _, block := range chain.blocks[1:] {
|
|
if mode != LightSync && (len(block.Transactions()) > 0 || len(block.Uncles()) > 0) {
|
|
bodiesNeeded++
|
|
}
|
|
}
|
|
for _, block := range chain.blocks[1:] {
|
|
if mode == SnapSync && len(block.Transactions()) > 0 {
|
|
receiptsNeeded++
|
|
}
|
|
}
|
|
if int(bodiesHave) != bodiesNeeded {
|
|
t.Errorf("body retrieval count mismatch: have %v, want %v", bodiesHave, bodiesNeeded)
|
|
}
|
|
if int(receiptsHave) != receiptsNeeded {
|
|
t.Errorf("receipt retrieval count mismatch: have %v, want %v", receiptsHave, receiptsNeeded)
|
|
}
|
|
}
|
|
|
|
// Tests that headers are enqueued continuously, preventing malicious nodes from
|
|
// stalling the downloader by feeding gapped header chains.
|
|
func TestMissingHeaderAttack66Full(t *testing.T) { testMissingHeaderAttack(t, eth.ETH66, FullSync) }
|
|
func TestMissingHeaderAttack66Snap(t *testing.T) { testMissingHeaderAttack(t, eth.ETH66, SnapSync) }
|
|
func TestMissingHeaderAttack66Light(t *testing.T) { testMissingHeaderAttack(t, eth.ETH66, LightSync) }
|
|
|
|
func testMissingHeaderAttack(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chain := testChainBase.shorten(blockCacheMaxItems - 15)
|
|
|
|
attacker := tester.newPeer("attack", protocol, chain.blocks[1:])
|
|
attacker.withholdHeaders[chain.blocks[len(chain.blocks)/2-1].Hash()] = struct{}{}
|
|
|
|
if err := tester.sync("attack", nil, mode); err == nil {
|
|
t.Fatalf("succeeded attacker synchronisation")
|
|
}
|
|
// Synchronise with the valid peer and make sure sync succeeds
|
|
tester.newPeer("valid", protocol, chain.blocks[1:])
|
|
if err := tester.sync("valid", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chain.blocks))
|
|
}
|
|
|
|
// Tests that if requested headers are shifted (i.e. first is missing), the queue
|
|
// detects the invalid numbering.
|
|
func TestShiftedHeaderAttack66Full(t *testing.T) { testShiftedHeaderAttack(t, eth.ETH66, FullSync) }
|
|
func TestShiftedHeaderAttack66Snap(t *testing.T) { testShiftedHeaderAttack(t, eth.ETH66, SnapSync) }
|
|
func TestShiftedHeaderAttack66Light(t *testing.T) { testShiftedHeaderAttack(t, eth.ETH66, LightSync) }
|
|
|
|
func testShiftedHeaderAttack(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chain := testChainBase.shorten(blockCacheMaxItems - 15)
|
|
|
|
// Attempt a full sync with an attacker feeding shifted headers
|
|
attacker := tester.newPeer("attack", protocol, chain.blocks[1:])
|
|
attacker.withholdHeaders[chain.blocks[1].Hash()] = struct{}{}
|
|
|
|
if err := tester.sync("attack", nil, mode); err == nil {
|
|
t.Fatalf("succeeded attacker synchronisation")
|
|
}
|
|
// Synchronise with the valid peer and make sure sync succeeds
|
|
tester.newPeer("valid", protocol, chain.blocks[1:])
|
|
if err := tester.sync("valid", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chain.blocks))
|
|
}
|
|
|
|
// Tests that upon detecting an invalid header, the recent ones are rolled back
|
|
// for various failure scenarios. Afterwards a full sync is attempted to make
|
|
// sure no state was corrupted.
|
|
func TestInvalidHeaderRollback66Snap(t *testing.T) { testInvalidHeaderRollback(t, eth.ETH66, SnapSync) }
|
|
|
|
func testInvalidHeaderRollback(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
// Create a small enough block chain to download
|
|
targetBlocks := 3*fsHeaderSafetyNet + 256 + fsMinFullBlocks
|
|
chain := testChainBase.shorten(targetBlocks)
|
|
|
|
// Attempt to sync with an attacker that feeds junk during the fast sync phase.
|
|
// This should result in the last fsHeaderSafetyNet headers being rolled back.
|
|
missing := fsHeaderSafetyNet + MaxHeaderFetch + 1
|
|
|
|
fastAttacker := tester.newPeer("fast-attack", protocol, chain.blocks[1:])
|
|
fastAttacker.withholdHeaders[chain.blocks[missing].Hash()] = struct{}{}
|
|
|
|
if err := tester.sync("fast-attack", nil, mode); err == nil {
|
|
t.Fatalf("succeeded fast attacker synchronisation")
|
|
}
|
|
if head := tester.chain.CurrentHeader().Number.Int64(); int(head) > MaxHeaderFetch {
|
|
t.Errorf("rollback head mismatch: have %v, want at most %v", head, MaxHeaderFetch)
|
|
}
|
|
// Attempt to sync with an attacker that feeds junk during the block import phase.
|
|
// This should result in both the last fsHeaderSafetyNet number of headers being
|
|
// rolled back, and also the pivot point being reverted to a non-block status.
|
|
missing = 3*fsHeaderSafetyNet + MaxHeaderFetch + 1
|
|
|
|
blockAttacker := tester.newPeer("block-attack", protocol, chain.blocks[1:])
|
|
fastAttacker.withholdHeaders[chain.blocks[missing].Hash()] = struct{}{} // Make sure the fast-attacker doesn't fill in
|
|
blockAttacker.withholdHeaders[chain.blocks[missing].Hash()] = struct{}{}
|
|
|
|
if err := tester.sync("block-attack", nil, mode); err == nil {
|
|
t.Fatalf("succeeded block attacker synchronisation")
|
|
}
|
|
if head := tester.chain.CurrentHeader().Number.Int64(); int(head) > 2*fsHeaderSafetyNet+MaxHeaderFetch {
|
|
t.Errorf("rollback head mismatch: have %v, want at most %v", head, 2*fsHeaderSafetyNet+MaxHeaderFetch)
|
|
}
|
|
if mode == SnapSync {
|
|
if head := tester.chain.CurrentBlock().NumberU64(); head != 0 {
|
|
t.Errorf("fast sync pivot block #%d not rolled back", head)
|
|
}
|
|
}
|
|
// Attempt to sync with an attacker that withholds promised blocks after the
|
|
// fast sync pivot point. This could be a trial to leave the node with a bad
|
|
// but already imported pivot block.
|
|
withholdAttacker := tester.newPeer("withhold-attack", protocol, chain.blocks[1:])
|
|
|
|
tester.downloader.syncInitHook = func(uint64, uint64) {
|
|
for i := missing; i < len(chain.blocks); i++ {
|
|
withholdAttacker.withholdHeaders[chain.blocks[i].Hash()] = struct{}{}
|
|
}
|
|
tester.downloader.syncInitHook = nil
|
|
}
|
|
if err := tester.sync("withhold-attack", nil, mode); err == nil {
|
|
t.Fatalf("succeeded withholding attacker synchronisation")
|
|
}
|
|
if head := tester.chain.CurrentHeader().Number.Int64(); int(head) > 2*fsHeaderSafetyNet+MaxHeaderFetch {
|
|
t.Errorf("rollback head mismatch: have %v, want at most %v", head, 2*fsHeaderSafetyNet+MaxHeaderFetch)
|
|
}
|
|
if mode == SnapSync {
|
|
if head := tester.chain.CurrentBlock().NumberU64(); head != 0 {
|
|
t.Errorf("fast sync pivot block #%d not rolled back", head)
|
|
}
|
|
}
|
|
// Synchronise with the valid peer and make sure sync succeeds. Since the last rollback
|
|
// should also disable fast syncing for this process, verify that we did a fresh full
|
|
// sync. Note, we can't assert anything about the receipts since we won't purge the
|
|
// database of them, hence we can't use assertOwnChain.
|
|
tester.newPeer("valid", protocol, chain.blocks[1:])
|
|
if err := tester.sync("valid", nil, mode); err != nil {
|
|
t.Fatalf("failed to synchronise blocks: %v", err)
|
|
}
|
|
assertOwnChain(t, tester, len(chain.blocks))
|
|
}
|
|
|
|
// Tests that a peer advertising a high TD doesn't get to stall the downloader
|
|
// afterwards by not sending any useful hashes.
|
|
func TestHighTDStarvationAttack66Full(t *testing.T) {
|
|
testHighTDStarvationAttack(t, eth.ETH66, FullSync)
|
|
}
|
|
func TestHighTDStarvationAttack66Snap(t *testing.T) {
|
|
testHighTDStarvationAttack(t, eth.ETH66, SnapSync)
|
|
}
|
|
func TestHighTDStarvationAttack66Light(t *testing.T) {
|
|
testHighTDStarvationAttack(t, eth.ETH66, LightSync)
|
|
}
|
|
|
|
func testHighTDStarvationAttack(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chain := testChainBase.shorten(1)
|
|
tester.newPeer("attack", protocol, chain.blocks[1:])
|
|
if err := tester.sync("attack", big.NewInt(1000000), mode); err != errStallingPeer {
|
|
t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errStallingPeer)
|
|
}
|
|
}
|
|
|
|
// Tests that misbehaving peers are disconnected, whilst behaving ones are not.
|
|
func TestBlockHeaderAttackerDropping66(t *testing.T) { testBlockHeaderAttackerDropping(t, eth.ETH66) }
|
|
|
|
func testBlockHeaderAttackerDropping(t *testing.T, protocol uint) {
|
|
// Define the disconnection requirement for individual hash fetch errors
|
|
tests := []struct {
|
|
result error
|
|
drop bool
|
|
}{
|
|
{nil, false}, // Sync succeeded, all is well
|
|
{errBusy, false}, // Sync is already in progress, no problem
|
|
{errUnknownPeer, false}, // Peer is unknown, was already dropped, don't double drop
|
|
{errBadPeer, true}, // Peer was deemed bad for some reason, drop it
|
|
{errStallingPeer, true}, // Peer was detected to be stalling, drop it
|
|
{errUnsyncedPeer, true}, // Peer was detected to be unsynced, drop it
|
|
{errNoPeers, false}, // No peers to download from, soft race, no issue
|
|
{errTimeout, true}, // No hashes received in due time, drop the peer
|
|
{errEmptyHeaderSet, true}, // No headers were returned as a response, drop as it's a dead end
|
|
{errPeersUnavailable, true}, // Nobody had the advertised blocks, drop the advertiser
|
|
{errInvalidAncestor, true}, // Agreed upon ancestor is not acceptable, drop the chain rewriter
|
|
{errInvalidChain, true}, // Hash chain was detected as invalid, definitely drop
|
|
{errInvalidBody, false}, // A bad peer was detected, but not the sync origin
|
|
{errInvalidReceipt, false}, // A bad peer was detected, but not the sync origin
|
|
{errCancelContentProcessing, false}, // Synchronisation was canceled, origin may be innocent, don't drop
|
|
}
|
|
// Run the tests and check disconnection status
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
chain := testChainBase.shorten(1)
|
|
|
|
for i, tt := range tests {
|
|
// Register a new peer and ensure its presence
|
|
id := fmt.Sprintf("test %d", i)
|
|
tester.newPeer(id, protocol, chain.blocks[1:])
|
|
if _, ok := tester.peers[id]; !ok {
|
|
t.Fatalf("test %d: registered peer not found", i)
|
|
}
|
|
// Simulate a synchronisation and check the required result
|
|
tester.downloader.synchroniseMock = func(string, common.Hash) error { return tt.result }
|
|
|
|
tester.downloader.Synchronise(id, tester.chain.Genesis().Hash(), big.NewInt(1000), FullSync)
|
|
if _, ok := tester.peers[id]; !ok != tt.drop {
|
|
t.Errorf("test %d: peer drop mismatch for %v: have %v, want %v", i, tt.result, !ok, tt.drop)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Tests that synchronisation progress (origin block number, current block number
|
|
// and highest block number) is tracked and updated correctly.
|
|
func TestSyncProgress66Full(t *testing.T) { testSyncProgress(t, eth.ETH66, FullSync) }
|
|
func TestSyncProgress66Snap(t *testing.T) { testSyncProgress(t, eth.ETH66, SnapSync) }
|
|
func TestSyncProgress66Light(t *testing.T) { testSyncProgress(t, eth.ETH66, LightSync) }
|
|
|
|
func testSyncProgress(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chain := testChainBase.shorten(blockCacheMaxItems - 15)
|
|
|
|
// Set a sync init hook to catch progress changes
|
|
starting := make(chan struct{})
|
|
progress := make(chan struct{})
|
|
|
|
tester.downloader.syncInitHook = func(origin, latest uint64) {
|
|
starting <- struct{}{}
|
|
<-progress
|
|
}
|
|
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
|
|
|
|
// Synchronise half the blocks and check initial progress
|
|
tester.newPeer("peer-half", protocol, chain.shorten(len(chain.blocks) / 2).blocks[1:])
|
|
pending := new(sync.WaitGroup)
|
|
pending.Add(1)
|
|
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("peer-half", nil, mode); err != nil {
|
|
panic(fmt.Sprintf("failed to synchronise blocks: %v", err))
|
|
}
|
|
}()
|
|
<-starting
|
|
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
|
|
HighestBlock: uint64(len(chain.blocks)/2 - 1),
|
|
})
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
|
|
// Synchronise all the blocks and check continuation progress
|
|
tester.newPeer("peer-full", protocol, chain.blocks[1:])
|
|
pending.Add(1)
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("peer-full", nil, mode); err != nil {
|
|
panic(fmt.Sprintf("failed to synchronise blocks: %v", err))
|
|
}
|
|
}()
|
|
<-starting
|
|
checkProgress(t, tester.downloader, "completing", ethereum.SyncProgress{
|
|
StartingBlock: uint64(len(chain.blocks)/2 - 1),
|
|
CurrentBlock: uint64(len(chain.blocks)/2 - 1),
|
|
HighestBlock: uint64(len(chain.blocks) - 1),
|
|
})
|
|
|
|
// Check final progress after successful sync
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
|
|
StartingBlock: uint64(len(chain.blocks)/2 - 1),
|
|
CurrentBlock: uint64(len(chain.blocks) - 1),
|
|
HighestBlock: uint64(len(chain.blocks) - 1),
|
|
})
|
|
}
|
|
|
|
func checkProgress(t *testing.T, d *Downloader, stage string, want ethereum.SyncProgress) {
|
|
// Mark this method as a helper to report errors at callsite, not in here
|
|
t.Helper()
|
|
|
|
p := d.Progress()
|
|
if p.StartingBlock != want.StartingBlock || p.CurrentBlock != want.CurrentBlock || p.HighestBlock != want.HighestBlock {
|
|
t.Fatalf("%s progress mismatch:\nhave %+v\nwant %+v", stage, p, want)
|
|
}
|
|
}
|
|
|
|
// Tests that synchronisation progress (origin block number and highest block
|
|
// number) is tracked and updated correctly in case of a fork (or manual head
|
|
// revertal).
|
|
func TestForkedSyncProgress66Full(t *testing.T) { testForkedSyncProgress(t, eth.ETH66, FullSync) }
|
|
func TestForkedSyncProgress66Snap(t *testing.T) { testForkedSyncProgress(t, eth.ETH66, SnapSync) }
|
|
func TestForkedSyncProgress66Light(t *testing.T) { testForkedSyncProgress(t, eth.ETH66, LightSync) }
|
|
|
|
func testForkedSyncProgress(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chainA := testChainForkLightA.shorten(len(testChainBase.blocks) + MaxHeaderFetch)
|
|
chainB := testChainForkLightB.shorten(len(testChainBase.blocks) + MaxHeaderFetch)
|
|
|
|
// Set a sync init hook to catch progress changes
|
|
starting := make(chan struct{})
|
|
progress := make(chan struct{})
|
|
|
|
tester.downloader.syncInitHook = func(origin, latest uint64) {
|
|
starting <- struct{}{}
|
|
<-progress
|
|
}
|
|
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
|
|
|
|
// Synchronise with one of the forks and check progress
|
|
tester.newPeer("fork A", protocol, chainA.blocks[1:])
|
|
pending := new(sync.WaitGroup)
|
|
pending.Add(1)
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("fork A", nil, mode); err != nil {
|
|
panic(fmt.Sprintf("failed to synchronise blocks: %v", err))
|
|
}
|
|
}()
|
|
<-starting
|
|
|
|
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
|
|
HighestBlock: uint64(len(chainA.blocks) - 1),
|
|
})
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
|
|
// Simulate a successful sync above the fork
|
|
tester.downloader.syncStatsChainOrigin = tester.downloader.syncStatsChainHeight
|
|
|
|
// Synchronise with the second fork and check progress resets
|
|
tester.newPeer("fork B", protocol, chainB.blocks[1:])
|
|
pending.Add(1)
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("fork B", nil, mode); err != nil {
|
|
panic(fmt.Sprintf("failed to synchronise blocks: %v", err))
|
|
}
|
|
}()
|
|
<-starting
|
|
checkProgress(t, tester.downloader, "forking", ethereum.SyncProgress{
|
|
StartingBlock: uint64(len(testChainBase.blocks)) - 1,
|
|
CurrentBlock: uint64(len(chainA.blocks) - 1),
|
|
HighestBlock: uint64(len(chainB.blocks) - 1),
|
|
})
|
|
|
|
// Check final progress after successful sync
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
|
|
StartingBlock: uint64(len(testChainBase.blocks)) - 1,
|
|
CurrentBlock: uint64(len(chainB.blocks) - 1),
|
|
HighestBlock: uint64(len(chainB.blocks) - 1),
|
|
})
|
|
}
|
|
|
|
// Tests that if synchronisation is aborted due to some failure, then the progress
|
|
// origin is not updated in the next sync cycle, as it should be considered the
|
|
// continuation of the previous sync and not a new instance.
|
|
func TestFailedSyncProgress66Full(t *testing.T) { testFailedSyncProgress(t, eth.ETH66, FullSync) }
|
|
func TestFailedSyncProgress66Snap(t *testing.T) { testFailedSyncProgress(t, eth.ETH66, SnapSync) }
|
|
func TestFailedSyncProgress66Light(t *testing.T) { testFailedSyncProgress(t, eth.ETH66, LightSync) }
|
|
|
|
func testFailedSyncProgress(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chain := testChainBase.shorten(blockCacheMaxItems - 15)
|
|
|
|
// Set a sync init hook to catch progress changes
|
|
starting := make(chan struct{})
|
|
progress := make(chan struct{})
|
|
|
|
tester.downloader.syncInitHook = func(origin, latest uint64) {
|
|
starting <- struct{}{}
|
|
<-progress
|
|
}
|
|
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
|
|
|
|
// Attempt a full sync with a faulty peer
|
|
missing := len(chain.blocks)/2 - 1
|
|
|
|
faulter := tester.newPeer("faulty", protocol, chain.blocks[1:])
|
|
faulter.withholdHeaders[chain.blocks[missing].Hash()] = struct{}{}
|
|
|
|
pending := new(sync.WaitGroup)
|
|
pending.Add(1)
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("faulty", nil, mode); err == nil {
|
|
panic("succeeded faulty synchronisation")
|
|
}
|
|
}()
|
|
<-starting
|
|
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
|
|
HighestBlock: uint64(len(chain.blocks) - 1),
|
|
})
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
afterFailedSync := tester.downloader.Progress()
|
|
|
|
// Synchronise with a good peer and check that the progress origin remind the same
|
|
// after a failure
|
|
tester.newPeer("valid", protocol, chain.blocks[1:])
|
|
pending.Add(1)
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("valid", nil, mode); err != nil {
|
|
panic(fmt.Sprintf("failed to synchronise blocks: %v", err))
|
|
}
|
|
}()
|
|
<-starting
|
|
checkProgress(t, tester.downloader, "completing", afterFailedSync)
|
|
|
|
// Check final progress after successful sync
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
|
|
CurrentBlock: uint64(len(chain.blocks) - 1),
|
|
HighestBlock: uint64(len(chain.blocks) - 1),
|
|
})
|
|
}
|
|
|
|
// Tests that if an attacker fakes a chain height, after the attack is detected,
|
|
// the progress height is successfully reduced at the next sync invocation.
|
|
func TestFakedSyncProgress66Full(t *testing.T) { testFakedSyncProgress(t, eth.ETH66, FullSync) }
|
|
func TestFakedSyncProgress66Snap(t *testing.T) { testFakedSyncProgress(t, eth.ETH66, SnapSync) }
|
|
func TestFakedSyncProgress66Light(t *testing.T) { testFakedSyncProgress(t, eth.ETH66, LightSync) }
|
|
|
|
func testFakedSyncProgress(t *testing.T, protocol uint, mode SyncMode) {
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
chain := testChainBase.shorten(blockCacheMaxItems - 15)
|
|
|
|
// Set a sync init hook to catch progress changes
|
|
starting := make(chan struct{})
|
|
progress := make(chan struct{})
|
|
tester.downloader.syncInitHook = func(origin, latest uint64) {
|
|
starting <- struct{}{}
|
|
<-progress
|
|
}
|
|
checkProgress(t, tester.downloader, "pristine", ethereum.SyncProgress{})
|
|
|
|
// Create and sync with an attacker that promises a higher chain than available.
|
|
attacker := tester.newPeer("attack", protocol, chain.blocks[1:])
|
|
numMissing := 5
|
|
for i := len(chain.blocks) - 2; i > len(chain.blocks)-numMissing; i-- {
|
|
attacker.withholdHeaders[chain.blocks[i].Hash()] = struct{}{}
|
|
}
|
|
pending := new(sync.WaitGroup)
|
|
pending.Add(1)
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("attack", nil, mode); err == nil {
|
|
panic("succeeded attacker synchronisation")
|
|
}
|
|
}()
|
|
<-starting
|
|
checkProgress(t, tester.downloader, "initial", ethereum.SyncProgress{
|
|
HighestBlock: uint64(len(chain.blocks) - 1),
|
|
})
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
afterFailedSync := tester.downloader.Progress()
|
|
|
|
// Synchronise with a good peer and check that the progress height has been reduced to
|
|
// the true value.
|
|
validChain := chain.shorten(len(chain.blocks) - numMissing)
|
|
tester.newPeer("valid", protocol, validChain.blocks[1:])
|
|
pending.Add(1)
|
|
|
|
go func() {
|
|
defer pending.Done()
|
|
if err := tester.sync("valid", nil, mode); err != nil {
|
|
panic(fmt.Sprintf("failed to synchronise blocks: %v", err))
|
|
}
|
|
}()
|
|
<-starting
|
|
checkProgress(t, tester.downloader, "completing", ethereum.SyncProgress{
|
|
CurrentBlock: afterFailedSync.CurrentBlock,
|
|
HighestBlock: uint64(len(validChain.blocks) - 1),
|
|
})
|
|
// Check final progress after successful sync.
|
|
progress <- struct{}{}
|
|
pending.Wait()
|
|
checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
|
|
CurrentBlock: uint64(len(validChain.blocks) - 1),
|
|
HighestBlock: uint64(len(validChain.blocks) - 1),
|
|
})
|
|
}
|
|
|
|
func TestRemoteHeaderRequestSpan(t *testing.T) {
|
|
testCases := []struct {
|
|
remoteHeight uint64
|
|
localHeight uint64
|
|
expected []int
|
|
}{
|
|
// Remote is way higher. We should ask for the remote head and go backwards
|
|
{1500, 1000,
|
|
[]int{1323, 1339, 1355, 1371, 1387, 1403, 1419, 1435, 1451, 1467, 1483, 1499},
|
|
},
|
|
{15000, 13006,
|
|
[]int{14823, 14839, 14855, 14871, 14887, 14903, 14919, 14935, 14951, 14967, 14983, 14999},
|
|
},
|
|
// Remote is pretty close to us. We don't have to fetch as many
|
|
{1200, 1150,
|
|
[]int{1149, 1154, 1159, 1164, 1169, 1174, 1179, 1184, 1189, 1194, 1199},
|
|
},
|
|
// Remote is equal to us (so on a fork with higher td)
|
|
// We should get the closest couple of ancestors
|
|
{1500, 1500,
|
|
[]int{1497, 1499},
|
|
},
|
|
// We're higher than the remote! Odd
|
|
{1000, 1500,
|
|
[]int{997, 999},
|
|
},
|
|
// Check some weird edgecases that it behaves somewhat rationally
|
|
{0, 1500,
|
|
[]int{0, 2},
|
|
},
|
|
{6000000, 0,
|
|
[]int{5999823, 5999839, 5999855, 5999871, 5999887, 5999903, 5999919, 5999935, 5999951, 5999967, 5999983, 5999999},
|
|
},
|
|
{0, 0,
|
|
[]int{0, 2},
|
|
},
|
|
}
|
|
reqs := func(from, count, span int) []int {
|
|
var r []int
|
|
num := from
|
|
for len(r) < count {
|
|
r = append(r, num)
|
|
num += span + 1
|
|
}
|
|
return r
|
|
}
|
|
for i, tt := range testCases {
|
|
from, count, span, max := calculateRequestSpan(tt.remoteHeight, tt.localHeight)
|
|
data := reqs(int(from), count, span)
|
|
|
|
if max != uint64(data[len(data)-1]) {
|
|
t.Errorf("test %d: wrong last value %d != %d", i, data[len(data)-1], max)
|
|
}
|
|
failed := false
|
|
if len(data) != len(tt.expected) {
|
|
failed = true
|
|
t.Errorf("test %d: length wrong, expected %d got %d", i, len(tt.expected), len(data))
|
|
} else {
|
|
for j, n := range data {
|
|
if n != tt.expected[j] {
|
|
failed = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if failed {
|
|
res := strings.Replace(fmt.Sprint(data), " ", ",", -1)
|
|
exp := strings.Replace(fmt.Sprint(tt.expected), " ", ",", -1)
|
|
t.Logf("got: %v\n", res)
|
|
t.Logf("exp: %v\n", exp)
|
|
t.Errorf("test %d: wrong values", i)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Tests that peers below a pre-configured checkpoint block are prevented from
|
|
// being fast-synced from, avoiding potential cheap eclipse attacks.
|
|
func TestCheckpointEnforcement66Full(t *testing.T) { testCheckpointEnforcement(t, eth.ETH66, FullSync) }
|
|
func TestCheckpointEnforcement66Snap(t *testing.T) { testCheckpointEnforcement(t, eth.ETH66, SnapSync) }
|
|
func TestCheckpointEnforcement66Light(t *testing.T) {
|
|
testCheckpointEnforcement(t, eth.ETH66, LightSync)
|
|
}
|
|
|
|
func testCheckpointEnforcement(t *testing.T, protocol uint, mode SyncMode) {
|
|
// Create a new tester with a particular hard coded checkpoint block
|
|
tester := newTester()
|
|
defer tester.terminate()
|
|
|
|
tester.downloader.checkpoint = uint64(fsMinFullBlocks) + 256
|
|
chain := testChainBase.shorten(int(tester.downloader.checkpoint) - 1)
|
|
|
|
// Attempt to sync with the peer and validate the result
|
|
tester.newPeer("peer", protocol, chain.blocks[1:])
|
|
|
|
var expect error
|
|
if mode == SnapSync || mode == LightSync {
|
|
expect = errUnsyncedPeer
|
|
}
|
|
if err := tester.sync("peer", nil, mode); !errors.Is(err, expect) {
|
|
t.Fatalf("block sync error mismatch: have %v, want %v", err, expect)
|
|
}
|
|
if mode == SnapSync || mode == LightSync {
|
|
assertOwnChain(t, tester, 1)
|
|
} else {
|
|
assertOwnChain(t, tester, len(chain.blocks))
|
|
}
|
|
}
|