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-rw-r--r--dex/downloader/downloader_test.go1481
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diff --git a/dex/downloader/downloader_test.go b/dex/downloader/downloader_test.go
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+// Copyright 2015 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 downloader
+
+import (
+ "errors"
+ "fmt"
+ "math/big"
+ "sync"
+ "sync/atomic"
+ "testing"
+ "time"
+
+ ethereum "github.com/dexon-foundation/dexon"
+ "github.com/dexon-foundation/dexon/common"
+ "github.com/dexon-foundation/dexon/core/types"
+ "github.com/dexon-foundation/dexon/ethdb"
+ "github.com/dexon-foundation/dexon/event"
+ "github.com/dexon-foundation/dexon/trie"
+)
+
+// Reduce some of the parameters to make the tester faster.
+func init() {
+ MaxForkAncestry = uint64(10000)
+ blockCacheItems = 1024
+ fsHeaderContCheck = 500 * time.Millisecond
+}
+
+// downloadTester is a test simulator for mocking out local block chain.
+type downloadTester struct {
+ downloader *Downloader
+
+ genesis *types.Block // Genesis blocks used by the tester and peers
+ stateDb ethdb.Database // Database used by the tester for syncing from peers
+ peerDb ethdb.Database // Database of the peers containing all data
+ peers map[string]*downloadTesterPeer
+
+ ownHashes []common.Hash // Hash chain belonging to the tester
+ ownHeaders map[common.Hash]*types.Header // Headers belonging to the tester
+ ownBlocks map[common.Hash]*types.Block // Blocks belonging to the tester
+ ownReceipts map[common.Hash]types.Receipts // Receipts belonging to the tester
+ ownChainTd map[common.Hash]*big.Int // Total difficulties of the blocks in the local chain
+
+ lock sync.RWMutex
+}
+
+// newTester creates a new downloader test mocker.
+func newTester() *downloadTester {
+ tester := &downloadTester{
+ genesis: testGenesis,
+ peerDb: testDB,
+ peers: make(map[string]*downloadTesterPeer),
+ ownHashes: []common.Hash{testGenesis.Hash()},
+ ownHeaders: map[common.Hash]*types.Header{testGenesis.Hash(): testGenesis.Header()},
+ ownBlocks: map[common.Hash]*types.Block{testGenesis.Hash(): testGenesis},
+ ownReceipts: map[common.Hash]types.Receipts{testGenesis.Hash(): nil},
+ ownChainTd: map[common.Hash]*big.Int{testGenesis.Hash(): testGenesis.Difficulty()},
+ }
+ tester.stateDb = ethdb.NewMemDatabase()
+ tester.stateDb.Put(testGenesis.Root().Bytes(), []byte{0x00})
+ tester.downloader = New(FullSync, tester.stateDb, new(event.TypeMux), tester, nil, tester.dropPeer)
+ return tester
+}
+
+// terminate aborts any operations on the embedded downloader and releases all
+// held resources.
+func (dl *downloadTester) terminate() {
+ dl.downloader.Terminate()
+}
+
+// sync starts synchronizing with a remote peer, blocking until it completes.
+func (dl *downloadTester) sync(id string, td *big.Int, mode SyncMode) error {
+ dl.lock.RLock()
+ hash := dl.peers[id].chain.headBlock().Hash()
+ // If no particular TD was requested, load from the peer's blockchain
+ if td == nil {
+ td = dl.peers[id].chain.td(hash)
+ }
+ dl.lock.RUnlock()
+
+ // Synchronise with the chosen peer and ensure proper cleanup afterwards
+ err := dl.downloader.synchronise(id, hash, td, mode)
+ select {
+ case <-dl.downloader.cancelCh:
+ // Ok, downloader fully cancelled after sync cycle
+ default:
+ // Downloader is still accepting packets, can block a peer up
+ panic("downloader active post sync cycle") // panic will be caught by tester
+ }
+ return err
+}
+
+// HasHeader checks if a header is present in the testers canonical chain.
+func (dl *downloadTester) HasHeader(hash common.Hash, number uint64) bool {
+ return dl.GetHeaderByHash(hash) != nil
+}
+
+// HasBlock checks if a block is present in the testers canonical chain.
+func (dl *downloadTester) HasBlock(hash common.Hash, number uint64) bool {
+ return dl.GetBlockByHash(hash) != nil
+}
+
+// GetHeader retrieves a header from the testers canonical chain.
+func (dl *downloadTester) GetHeaderByHash(hash common.Hash) *types.Header {
+ dl.lock.RLock()
+ defer dl.lock.RUnlock()
+
+ return dl.ownHeaders[hash]
+}
+
+// GetBlock retrieves a block from the testers canonical chain.
+func (dl *downloadTester) GetBlockByHash(hash common.Hash) *types.Block {
+ dl.lock.RLock()
+ defer dl.lock.RUnlock()
+
+ return dl.ownBlocks[hash]
+}
+
+// CurrentHeader retrieves the current head header from the canonical chain.
+func (dl *downloadTester) CurrentHeader() *types.Header {
+ dl.lock.RLock()
+ defer dl.lock.RUnlock()
+
+ for i := len(dl.ownHashes) - 1; i >= 0; i-- {
+ if header := dl.ownHeaders[dl.ownHashes[i]]; header != nil {
+ return header
+ }
+ }
+ return dl.genesis.Header()
+}
+
+// CurrentBlock retrieves the current head block from the canonical chain.
+func (dl *downloadTester) CurrentBlock() *types.Block {
+ dl.lock.RLock()
+ defer dl.lock.RUnlock()
+
+ for i := len(dl.ownHashes) - 1; i >= 0; i-- {
+ if block := dl.ownBlocks[dl.ownHashes[i]]; block != nil {
+ if _, err := dl.stateDb.Get(block.Root().Bytes()); err == nil {
+ return block
+ }
+ }
+ }
+ return dl.genesis
+}
+
+// CurrentFastBlock retrieves the current head fast-sync block from the canonical chain.
+func (dl *downloadTester) CurrentFastBlock() *types.Block {
+ dl.lock.RLock()
+ defer dl.lock.RUnlock()
+
+ for i := len(dl.ownHashes) - 1; i >= 0; i-- {
+ if block := dl.ownBlocks[dl.ownHashes[i]]; block != nil {
+ return block
+ }
+ }
+ return dl.genesis
+}
+
+// FastSyncCommitHead manually sets the head block to a given hash.
+func (dl *downloadTester) FastSyncCommitHead(hash common.Hash) error {
+ // For now only check that the state trie is correct
+ if block := dl.GetBlockByHash(hash); block != nil {
+ _, err := trie.NewSecure(block.Root(), trie.NewDatabase(dl.stateDb), 0)
+ return err
+ }
+ return fmt.Errorf("non existent block: %x", hash[:4])
+}
+
+// GetTd retrieves the block's total difficulty from the canonical chain.
+func (dl *downloadTester) GetTd(hash common.Hash, number uint64) *big.Int {
+ dl.lock.RLock()
+ defer dl.lock.RUnlock()
+
+ return dl.ownChainTd[hash]
+}
+
+// InsertHeaderChain injects a new batch of headers into the simulated chain.
+func (dl *downloadTester) InsertHeaderChain(headers []*types.Header, checkFreq int) (i int, err error) {
+ dl.lock.Lock()
+ defer dl.lock.Unlock()
+
+ // Do a quick check, as the blockchain.InsertHeaderChain doesn't insert anything in case of errors
+ if _, ok := dl.ownHeaders[headers[0].ParentHash]; !ok {
+ return 0, errors.New("unknown parent")
+ }
+ for i := 1; i < len(headers); i++ {
+ if headers[i].ParentHash != headers[i-1].Hash() {
+ return i, errors.New("unknown parent")
+ }
+ }
+ // Do a full insert if pre-checks passed
+ for i, header := range headers {
+ if _, ok := dl.ownHeaders[header.Hash()]; ok {
+ continue
+ }
+ if _, ok := dl.ownHeaders[header.ParentHash]; !ok {
+ return i, errors.New("unknown parent")
+ }
+ dl.ownHashes = append(dl.ownHashes, header.Hash())
+ dl.ownHeaders[header.Hash()] = header
+ dl.ownChainTd[header.Hash()] = new(big.Int).Add(dl.ownChainTd[header.ParentHash], header.Difficulty)
+ }
+ return len(headers), nil
+}
+
+// InsertChain injects a new batch of blocks into the simulated chain.
+func (dl *downloadTester) InsertChain(blocks types.Blocks) (i int, err error) {
+ dl.lock.Lock()
+ defer dl.lock.Unlock()
+
+ for i, block := range blocks {
+ if parent, ok := dl.ownBlocks[block.ParentHash()]; !ok {
+ return i, errors.New("unknown parent")
+ } else if _, err := dl.stateDb.Get(parent.Root().Bytes()); err != nil {
+ return i, fmt.Errorf("unknown parent state %x: %v", parent.Root(), err)
+ }
+ if _, ok := dl.ownHeaders[block.Hash()]; !ok {
+ dl.ownHashes = append(dl.ownHashes, block.Hash())
+ dl.ownHeaders[block.Hash()] = block.Header()
+ }
+ dl.ownBlocks[block.Hash()] = block
+ dl.stateDb.Put(block.Root().Bytes(), []byte{0x00})
+ dl.ownChainTd[block.Hash()] = new(big.Int).Add(dl.ownChainTd[block.ParentHash()], block.Difficulty())
+ }
+ return len(blocks), nil
+}
+
+// InsertReceiptChain injects a new batch of receipts into the simulated chain.
+func (dl *downloadTester) InsertReceiptChain(blocks types.Blocks, receipts []types.Receipts) (i int, err error) {
+ dl.lock.Lock()
+ defer dl.lock.Unlock()
+
+ for i := 0; i < len(blocks) && i < len(receipts); i++ {
+ if _, ok := dl.ownHeaders[blocks[i].Hash()]; !ok {
+ return i, errors.New("unknown owner")
+ }
+ if _, ok := dl.ownBlocks[blocks[i].ParentHash()]; !ok {
+ return i, errors.New("unknown parent")
+ }
+ dl.ownBlocks[blocks[i].Hash()] = blocks[i]
+ dl.ownReceipts[blocks[i].Hash()] = receipts[i]
+ }
+ return len(blocks), nil
+}
+
+// Rollback removes some recently added elements from the chain.
+func (dl *downloadTester) Rollback(hashes []common.Hash) {
+ dl.lock.Lock()
+ defer dl.lock.Unlock()
+
+ for i := len(hashes) - 1; i >= 0; i-- {
+ if dl.ownHashes[len(dl.ownHashes)-1] == hashes[i] {
+ dl.ownHashes = dl.ownHashes[:len(dl.ownHashes)-1]
+ }
+ delete(dl.ownChainTd, hashes[i])
+ delete(dl.ownHeaders, hashes[i])
+ delete(dl.ownReceipts, hashes[i])
+ delete(dl.ownBlocks, hashes[i])
+ }
+}
+
+// newPeer registers a new block download source into the downloader.
+func (dl *downloadTester) newPeer(id string, version int, chain *testChain) error {
+ dl.lock.Lock()
+ defer dl.lock.Unlock()
+
+ peer := &downloadTesterPeer{dl: dl, id: id, chain: chain}
+ dl.peers[id] = peer
+ return dl.downloader.RegisterPeer(id, version, peer)
+}
+
+// dropPeer simulates a hard peer removal from the connection pool.
+func (dl *downloadTester) dropPeer(id string) {
+ dl.lock.Lock()
+ defer dl.lock.Unlock()
+
+ delete(dl.peers, id)
+ dl.downloader.UnregisterPeer(id)
+}
+
+type downloadTesterPeer struct {
+ dl *downloadTester
+ id string
+ lock sync.RWMutex
+ chain *testChain
+ missingStates map[common.Hash]bool // State entries that fast sync should not return
+}
+
+// Head constructs a function to retrieve a peer's current head hash
+// and total difficulty.
+func (dlp *downloadTesterPeer) Head() (common.Hash, *big.Int) {
+ b := dlp.chain.headBlock()
+ return b.Hash(), dlp.chain.td(b.Hash())
+}
+
+// RequestHeadersByHash constructs a GetBlockHeaders function based on a hashed
+// origin; associated with a particular peer in the download tester. The returned
+// function can be used to retrieve batches of headers from the particular peer.
+func (dlp *downloadTesterPeer) RequestHeadersByHash(origin common.Hash, amount int, skip int, reverse bool) error {
+ if reverse {
+ panic("reverse header requests not supported")
+ }
+
+ result := dlp.chain.headersByHash(origin, amount, skip)
+ go dlp.dl.downloader.DeliverHeaders(dlp.id, result)
+ return nil
+}
+
+// RequestHeadersByNumber constructs a GetBlockHeaders function based on a numbered
+// origin; associated with a particular peer in the download tester. The returned
+// function can be used to retrieve batches of headers from the particular peer.
+func (dlp *downloadTesterPeer) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool) error {
+ if reverse {
+ panic("reverse header requests not supported")
+ }
+
+ result := dlp.chain.headersByNumber(origin, amount, skip)
+ go dlp.dl.downloader.DeliverHeaders(dlp.id, result)
+ return nil
+}
+
+// RequestBodies constructs a getBlockBodies method associated with a particular
+// peer in the download tester. The returned function can be used to retrieve
+// batches of block bodies from the particularly requested peer.
+func (dlp *downloadTesterPeer) RequestBodies(hashes []common.Hash) error {
+ txs, uncles := dlp.chain.bodies(hashes)
+ go dlp.dl.downloader.DeliverBodies(dlp.id, txs, uncles)
+ return nil
+}
+
+// RequestReceipts constructs a getReceipts method associated with a particular
+// peer in the download tester. The returned function can be used to retrieve
+// batches of block receipts from the particularly requested peer.
+func (dlp *downloadTesterPeer) RequestReceipts(hashes []common.Hash) error {
+ receipts := dlp.chain.receipts(hashes)
+ go dlp.dl.downloader.DeliverReceipts(dlp.id, receipts)
+ return nil
+}
+
+// RequestNodeData constructs a getNodeData method associated with a particular
+// peer in the download tester. The returned function can be used to retrieve
+// batches of node state data from the particularly requested peer.
+func (dlp *downloadTesterPeer) RequestNodeData(hashes []common.Hash) error {
+ dlp.dl.lock.RLock()
+ defer dlp.dl.lock.RUnlock()
+
+ results := make([][]byte, 0, len(hashes))
+ for _, hash := range hashes {
+ if data, err := dlp.dl.peerDb.Get(hash.Bytes()); err == nil {
+ if !dlp.missingStates[hash] {
+ results = append(results, data)
+ }
+ }
+ }
+ go dlp.dl.downloader.DeliverNodeData(dlp.id, results)
+ return nil
+}
+
+// assertOwnChain checks if the local chain contains the correct number of items
+// of the various chain components.
+func assertOwnChain(t *testing.T, tester *downloadTester, length int) {
+ assertOwnForkedChain(t, tester, 1, []int{length})
+}
+
+// assertOwnForkedChain checks if the local forked chain contains the correct
+// number of items of the various chain components.
+func assertOwnForkedChain(t *testing.T, tester *downloadTester, common int, lengths []int) {
+ // Initialize the counters for the first fork
+ headers, blocks, receipts := lengths[0], lengths[0], lengths[0]-fsMinFullBlocks
+
+ if receipts < 0 {
+ receipts = 1
+ }
+ // Update the counters for each subsequent fork
+ for _, length := range lengths[1:] {
+ headers += length - common
+ blocks += length - common
+ receipts += length - common - fsMinFullBlocks
+ }
+ switch tester.downloader.mode {
+ case FullSync:
+ receipts = 1
+ case LightSync:
+ blocks, receipts = 1, 1
+ }
+ if hs := len(tester.ownHeaders); hs != headers {
+ t.Fatalf("synchronised headers mismatch: have %v, want %v", hs, headers)
+ }
+ if bs := len(tester.ownBlocks); bs != blocks {
+ t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, blocks)
+ }
+ if rs := len(tester.ownReceipts); rs != receipts {
+ t.Fatalf("synchronised receipts mismatch: have %v, want %v", rs, receipts)
+ }
+}
+
+// Tests that simple synchronization against a canonical chain works correctly.
+// In this test common ancestor lookup should be short circuited and not require
+// binary searching.
+func TestCanonicalSynchronisation62(t *testing.T) { testCanonicalSynchronisation(t, 62, FullSync) }
+func TestCanonicalSynchronisation63Full(t *testing.T) { testCanonicalSynchronisation(t, 63, FullSync) }
+func TestCanonicalSynchronisation63Fast(t *testing.T) { testCanonicalSynchronisation(t, 63, FastSync) }
+func TestCanonicalSynchronisation64Full(t *testing.T) { testCanonicalSynchronisation(t, 64, FullSync) }
+func TestCanonicalSynchronisation64Fast(t *testing.T) { testCanonicalSynchronisation(t, 64, FastSync) }
+func TestCanonicalSynchronisation64Light(t *testing.T) { testCanonicalSynchronisation(t, 64, LightSync) }
+
+func testCanonicalSynchronisation(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ // Create a small enough block chain to download
+ chain := testChainBase.shorten(blockCacheItems - 15)
+ tester.newPeer("peer", protocol, chain)
+
+ // Synchronise with the peer and make sure all relevant data was retrieved
+ if err := tester.sync("peer", nil, mode); err != nil {
+ t.Fatalf("failed to synchronise blocks: %v", err)
+ }
+ assertOwnChain(t, tester, chain.len())
+}
+
+// Tests that if a large batch of blocks are being downloaded, it is throttled
+// until the cached blocks are retrieved.
+func TestThrottling62(t *testing.T) { testThrottling(t, 62, FullSync) }
+func TestThrottling63Full(t *testing.T) { testThrottling(t, 63, FullSync) }
+func TestThrottling63Fast(t *testing.T) { testThrottling(t, 63, FastSync) }
+func TestThrottling64Full(t *testing.T) { testThrottling(t, 64, FullSync) }
+func TestThrottling64Fast(t *testing.T) { testThrottling(t, 64, FastSync) }
+
+func testThrottling(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+ tester := newTester()
+ defer tester.terminate()
+
+ // Create a long block chain to download and the tester
+ targetBlocks := testChainBase.len() - 1
+ tester.newPeer("peer", protocol, testChainBase)
+
+ // Wrap the importer to allow stepping
+ blocked, proceed := uint32(0), make(chan struct{})
+ tester.downloader.chainInsertHook = func(results []*fetchResult) {
+ atomic.StoreUint32(&blocked, uint32(len(results)))
+ <-proceed
+ }
+ // Start a synchronisation concurrently
+ errc := make(chan error)
+ go func() {
+ errc <- tester.sync("peer", nil, mode)
+ }()
+ // Iteratively take some blocks, always checking the retrieval count
+ for {
+ // Check the retrieval count synchronously (! reason for this ugly block)
+ tester.lock.RLock()
+ retrieved := len(tester.ownBlocks)
+ tester.lock.RUnlock()
+ if retrieved >= targetBlocks+1 {
+ break
+ }
+ // Wait a bit for sync to throttle itself
+ var cached, frozen int
+ for start := time.Now(); time.Since(start) < 3*time.Second; {
+ time.Sleep(25 * time.Millisecond)
+
+ tester.lock.Lock()
+ tester.downloader.queue.lock.Lock()
+ cached = len(tester.downloader.queue.blockDonePool)
+ if mode == FastSync {
+ if receipts := len(tester.downloader.queue.receiptDonePool); receipts < cached {
+ cached = receipts
+ }
+ }
+ frozen = int(atomic.LoadUint32(&blocked))
+ retrieved = len(tester.ownBlocks)
+ tester.downloader.queue.lock.Unlock()
+ tester.lock.Unlock()
+
+ if cached == blockCacheItems || cached == blockCacheItems-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 = len(tester.ownBlocks)
+ tester.lock.RUnlock()
+ if cached != blockCacheItems && cached != blockCacheItems-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, blockCacheItems, 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 TestForkedSync62(t *testing.T) { testForkedSync(t, 62, FullSync) }
+func TestForkedSync63Full(t *testing.T) { testForkedSync(t, 63, FullSync) }
+func TestForkedSync63Fast(t *testing.T) { testForkedSync(t, 63, FastSync) }
+func TestForkedSync64Full(t *testing.T) { testForkedSync(t, 64, FullSync) }
+func TestForkedSync64Fast(t *testing.T) { testForkedSync(t, 64, FastSync) }
+func TestForkedSync64Light(t *testing.T) { testForkedSync(t, 64, LightSync) }
+
+func testForkedSync(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ chainA := testChainForkLightA.shorten(testChainBase.len() + 80)
+ chainB := testChainForkLightB.shorten(testChainBase.len() + 80)
+ tester.newPeer("fork A", protocol, chainA)
+ tester.newPeer("fork B", protocol, chainB)
+
+ // 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, chainA.len())
+
+ // 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)
+ }
+ assertOwnForkedChain(t, tester, testChainBase.len(), []int{chainA.len(), chainB.len()})
+}
+
+// Tests that synchronising against a much shorter but much heavyer fork works
+// corrently and is not dropped.
+func TestHeavyForkedSync62(t *testing.T) { testHeavyForkedSync(t, 62, FullSync) }
+func TestHeavyForkedSync63Full(t *testing.T) { testHeavyForkedSync(t, 63, FullSync) }
+func TestHeavyForkedSync63Fast(t *testing.T) { testHeavyForkedSync(t, 63, FastSync) }
+func TestHeavyForkedSync64Full(t *testing.T) { testHeavyForkedSync(t, 64, FullSync) }
+func TestHeavyForkedSync64Fast(t *testing.T) { testHeavyForkedSync(t, 64, FastSync) }
+func TestHeavyForkedSync64Light(t *testing.T) { testHeavyForkedSync(t, 64, LightSync) }
+
+func testHeavyForkedSync(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ chainA := testChainForkLightA.shorten(testChainBase.len() + 80)
+ chainB := testChainForkHeavy.shorten(testChainBase.len() + 80)
+ tester.newPeer("light", protocol, chainA)
+ tester.newPeer("heavy", protocol, chainB)
+
+ // 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, chainA.len())
+
+ // 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)
+ }
+ assertOwnForkedChain(t, tester, testChainBase.len(), []int{chainA.len(), chainB.len()})
+}
+
+// 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 TestBoundedForkedSync62(t *testing.T) { testBoundedForkedSync(t, 62, FullSync) }
+func TestBoundedForkedSync63Full(t *testing.T) { testBoundedForkedSync(t, 63, FullSync) }
+func TestBoundedForkedSync63Fast(t *testing.T) { testBoundedForkedSync(t, 63, FastSync) }
+func TestBoundedForkedSync64Full(t *testing.T) { testBoundedForkedSync(t, 64, FullSync) }
+func TestBoundedForkedSync64Fast(t *testing.T) { testBoundedForkedSync(t, 64, FastSync) }
+func TestBoundedForkedSync64Light(t *testing.T) { testBoundedForkedSync(t, 64, LightSync) }
+
+func testBoundedForkedSync(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ chainA := testChainForkLightA
+ chainB := testChainForkLightB
+ tester.newPeer("original", protocol, chainA)
+ tester.newPeer("rewriter", protocol, chainB)
+
+ // 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, chainA.len())
+
+ // 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 TestBoundedHeavyForkedSync62(t *testing.T) { testBoundedHeavyForkedSync(t, 62, FullSync) }
+func TestBoundedHeavyForkedSync63Full(t *testing.T) { testBoundedHeavyForkedSync(t, 63, FullSync) }
+func TestBoundedHeavyForkedSync63Fast(t *testing.T) { testBoundedHeavyForkedSync(t, 63, FastSync) }
+func TestBoundedHeavyForkedSync64Full(t *testing.T) { testBoundedHeavyForkedSync(t, 64, FullSync) }
+func TestBoundedHeavyForkedSync64Fast(t *testing.T) { testBoundedHeavyForkedSync(t, 64, FastSync) }
+func TestBoundedHeavyForkedSync64Light(t *testing.T) { testBoundedHeavyForkedSync(t, 64, LightSync) }
+
+func testBoundedHeavyForkedSync(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ // Create a long enough forked chain
+ chainA := testChainForkLightA
+ chainB := testChainForkHeavy
+ tester.newPeer("original", protocol, chainA)
+ tester.newPeer("heavy-rewriter", protocol, chainB)
+
+ // 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, chainA.len())
+
+ // 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 an inactive downloader will not accept incoming block headers and
+// bodies.
+func TestInactiveDownloader62(t *testing.T) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ // Check that neither block headers nor bodies are accepted
+ if err := tester.downloader.DeliverHeaders("bad peer", []*types.Header{}); err != errNoSyncActive {
+ t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
+ }
+ if err := tester.downloader.DeliverBodies("bad peer", [][]*types.Transaction{}, [][]*types.Header{}); err != errNoSyncActive {
+ t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
+ }
+}
+
+// Tests that an inactive downloader will not accept incoming block headers,
+// bodies and receipts.
+func TestInactiveDownloader63(t *testing.T) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ // Check that neither block headers nor bodies are accepted
+ if err := tester.downloader.DeliverHeaders("bad peer", []*types.Header{}); err != errNoSyncActive {
+ t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
+ }
+ if err := tester.downloader.DeliverBodies("bad peer", [][]*types.Transaction{}, [][]*types.Header{}); err != errNoSyncActive {
+ t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
+ }
+ if err := tester.downloader.DeliverReceipts("bad peer", [][]*types.Receipt{}); err != errNoSyncActive {
+ t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive)
+ }
+}
+
+// Tests that a canceled download wipes all previously accumulated state.
+func TestCancel62(t *testing.T) { testCancel(t, 62, FullSync) }
+func TestCancel63Full(t *testing.T) { testCancel(t, 63, FullSync) }
+func TestCancel63Fast(t *testing.T) { testCancel(t, 63, FastSync) }
+func TestCancel64Full(t *testing.T) { testCancel(t, 64, FullSync) }
+func TestCancel64Fast(t *testing.T) { testCancel(t, 64, FastSync) }
+func TestCancel64Light(t *testing.T) { testCancel(t, 64, LightSync) }
+
+func testCancel(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ chain := testChainBase.shorten(MaxHeaderFetch)
+ tester.newPeer("peer", protocol, chain)
+
+ // 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 TestMultiSynchronisation62(t *testing.T) { testMultiSynchronisation(t, 62, FullSync) }
+func TestMultiSynchronisation63Full(t *testing.T) { testMultiSynchronisation(t, 63, FullSync) }
+func TestMultiSynchronisation63Fast(t *testing.T) { testMultiSynchronisation(t, 63, FastSync) }
+func TestMultiSynchronisation64Full(t *testing.T) { testMultiSynchronisation(t, 64, FullSync) }
+func TestMultiSynchronisation64Fast(t *testing.T) { testMultiSynchronisation(t, 64, FastSync) }
+func TestMultiSynchronisation64Light(t *testing.T) { testMultiSynchronisation(t, 64, LightSync) }
+
+func testMultiSynchronisation(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ 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(chain.len()/(i+1)))
+ }
+ if err := tester.sync("peer #0", nil, mode); err != nil {
+ t.Fatalf("failed to synchronise blocks: %v", err)
+ }
+ assertOwnChain(t, tester, chain.len())
+}
+
+// Tests that synchronisations behave well in multi-version protocol environments
+// and not wreak havoc on other nodes in the network.
+func TestMultiProtoSynchronisation62(t *testing.T) { testMultiProtoSync(t, 62, FullSync) }
+func TestMultiProtoSynchronisation63Full(t *testing.T) { testMultiProtoSync(t, 63, FullSync) }
+func TestMultiProtoSynchronisation63Fast(t *testing.T) { testMultiProtoSync(t, 63, FastSync) }
+func TestMultiProtoSynchronisation64Full(t *testing.T) { testMultiProtoSync(t, 64, FullSync) }
+func TestMultiProtoSynchronisation64Fast(t *testing.T) { testMultiProtoSync(t, 64, FastSync) }
+func TestMultiProtoSynchronisation64Light(t *testing.T) { testMultiProtoSync(t, 64, LightSync) }
+
+func testMultiProtoSync(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ // Create a small enough block chain to download
+ chain := testChainBase.shorten(blockCacheItems - 15)
+
+ // Create peers of every type
+ tester.newPeer("peer 62", 62, chain)
+ tester.newPeer("peer 63", 63, chain)
+ tester.newPeer("peer 64", 64, chain)
+
+ // 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, chain.len())
+
+ // Check that no peers have been dropped off
+ for _, version := range []int{62, 63, 64} {
+ 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 TestEmptyShortCircuit62(t *testing.T) { testEmptyShortCircuit(t, 62, FullSync) }
+func TestEmptyShortCircuit63Full(t *testing.T) { testEmptyShortCircuit(t, 63, FullSync) }
+func TestEmptyShortCircuit63Fast(t *testing.T) { testEmptyShortCircuit(t, 63, FastSync) }
+func TestEmptyShortCircuit64Full(t *testing.T) { testEmptyShortCircuit(t, 64, FullSync) }
+func TestEmptyShortCircuit64Fast(t *testing.T) { testEmptyShortCircuit(t, 64, FastSync) }
+func TestEmptyShortCircuit64Light(t *testing.T) { testEmptyShortCircuit(t, 64, LightSync) }
+
+func testEmptyShortCircuit(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ // Create a block chain to download
+ chain := testChainBase
+ tester.newPeer("peer", protocol, chain)
+
+ // 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, chain.len())
+
+ // Validate the number of block bodies that should have been requested
+ bodiesNeeded, receiptsNeeded := 0, 0
+ for _, block := range chain.blockm {
+ if mode != LightSync && block != tester.genesis && (len(block.Transactions()) > 0 || len(block.Uncles()) > 0) {
+ bodiesNeeded++
+ }
+ }
+ for _, receipt := range chain.receiptm {
+ if mode == FastSync && len(receipt) > 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 TestMissingHeaderAttack62(t *testing.T) { testMissingHeaderAttack(t, 62, FullSync) }
+func TestMissingHeaderAttack63Full(t *testing.T) { testMissingHeaderAttack(t, 63, FullSync) }
+func TestMissingHeaderAttack63Fast(t *testing.T) { testMissingHeaderAttack(t, 63, FastSync) }
+func TestMissingHeaderAttack64Full(t *testing.T) { testMissingHeaderAttack(t, 64, FullSync) }
+func TestMissingHeaderAttack64Fast(t *testing.T) { testMissingHeaderAttack(t, 64, FastSync) }
+func TestMissingHeaderAttack64Light(t *testing.T) { testMissingHeaderAttack(t, 64, LightSync) }
+
+func testMissingHeaderAttack(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ chain := testChainBase.shorten(blockCacheItems - 15)
+ brokenChain := chain.shorten(chain.len())
+ delete(brokenChain.headerm, brokenChain.chain[brokenChain.len()/2])
+ tester.newPeer("attack", protocol, brokenChain)
+
+ 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)
+ if err := tester.sync("valid", nil, mode); err != nil {
+ t.Fatalf("failed to synchronise blocks: %v", err)
+ }
+ assertOwnChain(t, tester, chain.len())
+}
+
+// Tests that if requested headers are shifted (i.e. first is missing), the queue
+// detects the invalid numbering.
+func TestShiftedHeaderAttack62(t *testing.T) { testShiftedHeaderAttack(t, 62, FullSync) }
+func TestShiftedHeaderAttack63Full(t *testing.T) { testShiftedHeaderAttack(t, 63, FullSync) }
+func TestShiftedHeaderAttack63Fast(t *testing.T) { testShiftedHeaderAttack(t, 63, FastSync) }
+func TestShiftedHeaderAttack64Full(t *testing.T) { testShiftedHeaderAttack(t, 64, FullSync) }
+func TestShiftedHeaderAttack64Fast(t *testing.T) { testShiftedHeaderAttack(t, 64, FastSync) }
+func TestShiftedHeaderAttack64Light(t *testing.T) { testShiftedHeaderAttack(t, 64, LightSync) }
+
+func testShiftedHeaderAttack(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ chain := testChainBase.shorten(blockCacheItems - 15)
+
+ // Attempt a full sync with an attacker feeding shifted headers
+ brokenChain := chain.shorten(chain.len())
+ delete(brokenChain.headerm, brokenChain.chain[1])
+ delete(brokenChain.blockm, brokenChain.chain[1])
+ delete(brokenChain.receiptm, brokenChain.chain[1])
+ tester.newPeer("attack", protocol, brokenChain)
+ 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)
+ if err := tester.sync("valid", nil, mode); err != nil {
+ t.Fatalf("failed to synchronise blocks: %v", err)
+ }
+ assertOwnChain(t, tester, chain.len())
+}
+
+// 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 TestInvalidHeaderRollback63Fast(t *testing.T) { testInvalidHeaderRollback(t, 63, FastSync) }
+func TestInvalidHeaderRollback64Fast(t *testing.T) { testInvalidHeaderRollback(t, 64, FastSync) }
+func TestInvalidHeaderRollback64Light(t *testing.T) { testInvalidHeaderRollback(t, 64, LightSync) }
+
+func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ 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
+ fastAttackChain := chain.shorten(chain.len())
+ delete(fastAttackChain.headerm, fastAttackChain.chain[missing])
+ tester.newPeer("fast-attack", protocol, fastAttackChain)
+
+ if err := tester.sync("fast-attack", nil, mode); err == nil {
+ t.Fatalf("succeeded fast attacker synchronisation")
+ }
+ if head := tester.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
+ blockAttackChain := chain.shorten(chain.len())
+ delete(fastAttackChain.headerm, fastAttackChain.chain[missing]) // Make sure the fast-attacker doesn't fill in
+ delete(blockAttackChain.headerm, blockAttackChain.chain[missing])
+ tester.newPeer("block-attack", protocol, blockAttackChain)
+
+ if err := tester.sync("block-attack", nil, mode); err == nil {
+ t.Fatalf("succeeded block attacker synchronisation")
+ }
+ if head := tester.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 == FastSync {
+ if head := tester.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.
+ withholdAttackChain := chain.shorten(chain.len())
+ tester.newPeer("withhold-attack", protocol, withholdAttackChain)
+ tester.downloader.syncInitHook = func(uint64, uint64) {
+ for i := missing; i < withholdAttackChain.len(); i++ {
+ delete(withholdAttackChain.headerm, withholdAttackChain.chain[i])
+ }
+ tester.downloader.syncInitHook = nil
+ }
+ if err := tester.sync("withhold-attack", nil, mode); err == nil {
+ t.Fatalf("succeeded withholding attacker synchronisation")
+ }
+ if head := tester.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 == FastSync {
+ if head := tester.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)
+ if err := tester.sync("valid", nil, mode); err != nil {
+ t.Fatalf("failed to synchronise blocks: %v", err)
+ }
+ if hs := len(tester.ownHeaders); hs != chain.len() {
+ t.Fatalf("synchronised headers mismatch: have %v, want %v", hs, chain.len())
+ }
+ if mode != LightSync {
+ if bs := len(tester.ownBlocks); bs != chain.len() {
+ t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, chain.len())
+ }
+ }
+}
+
+// Tests that a peer advertising an high TD doesn't get to stall the downloader
+// afterwards by not sending any useful hashes.
+func TestHighTDStarvationAttack62(t *testing.T) { testHighTDStarvationAttack(t, 62, FullSync) }
+func TestHighTDStarvationAttack63Full(t *testing.T) { testHighTDStarvationAttack(t, 63, FullSync) }
+func TestHighTDStarvationAttack63Fast(t *testing.T) { testHighTDStarvationAttack(t, 63, FastSync) }
+func TestHighTDStarvationAttack64Full(t *testing.T) { testHighTDStarvationAttack(t, 64, FullSync) }
+func TestHighTDStarvationAttack64Fast(t *testing.T) { testHighTDStarvationAttack(t, 64, FastSync) }
+func TestHighTDStarvationAttack64Light(t *testing.T) { testHighTDStarvationAttack(t, 64, LightSync) }
+
+func testHighTDStarvationAttack(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+
+ chain := testChainBase.shorten(1)
+ tester.newPeer("attack", protocol, chain)
+ 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 TestBlockHeaderAttackerDropping62(t *testing.T) { testBlockHeaderAttackerDropping(t, 62) }
+func TestBlockHeaderAttackerDropping63(t *testing.T) { testBlockHeaderAttackerDropping(t, 63) }
+func TestBlockHeaderAttackerDropping64(t *testing.T) { testBlockHeaderAttackerDropping(t, 64) }
+
+func testBlockHeaderAttackerDropping(t *testing.T, protocol int) {
+ t.Parallel()
+
+ // 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
+ {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
+ {errInvalidBlock, false}, // A bad peer was detected, but not the sync origin
+ {errInvalidBody, false}, // A bad peer was detected, but not the sync origin
+ {errInvalidReceipt, false}, // A bad peer was detected, but not the sync origin
+ {errCancelBlockFetch, false}, // Synchronisation was canceled, origin may be innocent, don't drop
+ {errCancelHeaderFetch, false}, // Synchronisation was canceled, origin may be innocent, don't drop
+ {errCancelBodyFetch, false}, // Synchronisation was canceled, origin may be innocent, don't drop
+ {errCancelReceiptFetch, false}, // Synchronisation was canceled, origin may be innocent, don't drop
+ {errCancelHeaderProcessing, false}, // Synchronisation was canceled, origin may be innocent, don't drop
+ {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 it's presence
+ id := fmt.Sprintf("test %d", i)
+ if err := tester.newPeer(id, protocol, chain); err != nil {
+ t.Fatalf("test %d: failed to register new peer: %v", i, err)
+ }
+ 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.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 TestSyncProgress62(t *testing.T) { testSyncProgress(t, 62, FullSync) }
+func TestSyncProgress63Full(t *testing.T) { testSyncProgress(t, 63, FullSync) }
+func TestSyncProgress63Fast(t *testing.T) { testSyncProgress(t, 63, FastSync) }
+func TestSyncProgress64Full(t *testing.T) { testSyncProgress(t, 64, FullSync) }
+func TestSyncProgress64Fast(t *testing.T) { testSyncProgress(t, 64, FastSync) }
+func TestSyncProgress64Light(t *testing.T) { testSyncProgress(t, 64, LightSync) }
+
+func testSyncProgress(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+ chain := testChainBase.shorten(blockCacheItems - 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(chain.len()/2))
+ 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(chain.len()/2 - 1),
+ })
+ progress <- struct{}{}
+ pending.Wait()
+
+ // Synchronise all the blocks and check continuation progress
+ tester.newPeer("peer-full", protocol, chain)
+ 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(chain.len()/2 - 1),
+ CurrentBlock: uint64(chain.len()/2 - 1),
+ HighestBlock: uint64(chain.len() - 1),
+ })
+
+ // Check final progress after successful sync
+ progress <- struct{}{}
+ pending.Wait()
+ checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
+ StartingBlock: uint64(chain.len()/2 - 1),
+ CurrentBlock: uint64(chain.len() - 1),
+ HighestBlock: uint64(chain.len() - 1),
+ })
+}
+
+func checkProgress(t *testing.T, d *Downloader, stage string, want ethereum.SyncProgress) {
+ t.Helper()
+ p := d.Progress()
+ p.KnownStates, p.PulledStates = 0, 0
+ want.KnownStates, want.PulledStates = 0, 0
+ if p != want {
+ 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 TestForkedSyncProgress62(t *testing.T) { testForkedSyncProgress(t, 62, FullSync) }
+func TestForkedSyncProgress63Full(t *testing.T) { testForkedSyncProgress(t, 63, FullSync) }
+func TestForkedSyncProgress63Fast(t *testing.T) { testForkedSyncProgress(t, 63, FastSync) }
+func TestForkedSyncProgress64Full(t *testing.T) { testForkedSyncProgress(t, 64, FullSync) }
+func TestForkedSyncProgress64Fast(t *testing.T) { testForkedSyncProgress(t, 64, FastSync) }
+func TestForkedSyncProgress64Light(t *testing.T) { testForkedSyncProgress(t, 64, LightSync) }
+
+func testForkedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+ chainA := testChainForkLightA.shorten(testChainBase.len() + MaxHashFetch)
+ chainB := testChainForkLightB.shorten(testChainBase.len() + MaxHashFetch)
+
+ // 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)
+ 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(chainA.len() - 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)
+ 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(testChainBase.len()) - 1,
+ CurrentBlock: uint64(chainA.len() - 1),
+ HighestBlock: uint64(chainB.len() - 1),
+ })
+
+ // Check final progress after successful sync
+ progress <- struct{}{}
+ pending.Wait()
+ checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
+ StartingBlock: uint64(testChainBase.len()) - 1,
+ CurrentBlock: uint64(chainB.len() - 1),
+ HighestBlock: uint64(chainB.len() - 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 TestFailedSyncProgress62(t *testing.T) { testFailedSyncProgress(t, 62, FullSync) }
+func TestFailedSyncProgress63Full(t *testing.T) { testFailedSyncProgress(t, 63, FullSync) }
+func TestFailedSyncProgress63Fast(t *testing.T) { testFailedSyncProgress(t, 63, FastSync) }
+func TestFailedSyncProgress64Full(t *testing.T) { testFailedSyncProgress(t, 64, FullSync) }
+func TestFailedSyncProgress64Fast(t *testing.T) { testFailedSyncProgress(t, 64, FastSync) }
+func TestFailedSyncProgress64Light(t *testing.T) { testFailedSyncProgress(t, 64, LightSync) }
+
+func testFailedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+ chain := testChainBase.shorten(blockCacheItems - 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
+ brokenChain := chain.shorten(chain.len())
+ missing := brokenChain.len() / 2
+ delete(brokenChain.headerm, brokenChain.chain[missing])
+ delete(brokenChain.blockm, brokenChain.chain[missing])
+ delete(brokenChain.receiptm, brokenChain.chain[missing])
+ tester.newPeer("faulty", protocol, brokenChain)
+
+ 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(brokenChain.len() - 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)
+ 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(chain.len() - 1),
+ HighestBlock: uint64(chain.len() - 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 TestFakedSyncProgress62(t *testing.T) { testFakedSyncProgress(t, 62, FullSync) }
+func TestFakedSyncProgress63Full(t *testing.T) { testFakedSyncProgress(t, 63, FullSync) }
+func TestFakedSyncProgress63Fast(t *testing.T) { testFakedSyncProgress(t, 63, FastSync) }
+func TestFakedSyncProgress64Full(t *testing.T) { testFakedSyncProgress(t, 64, FullSync) }
+func TestFakedSyncProgress64Fast(t *testing.T) { testFakedSyncProgress(t, 64, FastSync) }
+func TestFakedSyncProgress64Light(t *testing.T) { testFakedSyncProgress(t, 64, LightSync) }
+
+func testFakedSyncProgress(t *testing.T, protocol int, mode SyncMode) {
+ t.Parallel()
+
+ tester := newTester()
+ defer tester.terminate()
+ chain := testChainBase.shorten(blockCacheItems - 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.
+ brokenChain := chain.shorten(chain.len())
+ numMissing := 5
+ for i := brokenChain.len() - 2; i > brokenChain.len()-numMissing; i-- {
+ delete(brokenChain.headerm, brokenChain.chain[i])
+ }
+ tester.newPeer("attack", protocol, brokenChain)
+
+ 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(brokenChain.len() - 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(chain.len() - numMissing)
+ tester.newPeer("valid", protocol, validChain)
+ 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(validChain.len() - 1),
+ })
+
+ // Check final progress after successful sync.
+ progress <- struct{}{}
+ pending.Wait()
+ checkProgress(t, tester.downloader, "final", ethereum.SyncProgress{
+ CurrentBlock: uint64(validChain.len() - 1),
+ HighestBlock: uint64(validChain.len() - 1),
+ })
+}
+
+// This test reproduces an issue where unexpected deliveries would
+// block indefinitely if they arrived at the right time.
+func TestDeliverHeadersHang(t *testing.T) {
+ t.Parallel()
+
+ testCases := []struct {
+ protocol int
+ syncMode SyncMode
+ }{
+ {62, FullSync},
+ {63, FullSync},
+ {63, FastSync},
+ {64, FullSync},
+ {64, FastSync},
+ {64, LightSync},
+ }
+ for _, tc := range testCases {
+ t.Run(fmt.Sprintf("protocol %d mode %v", tc.protocol, tc.syncMode), func(t *testing.T) {
+ t.Parallel()
+ testDeliverHeadersHang(t, tc.protocol, tc.syncMode)
+ })
+ }
+}
+
+func testDeliverHeadersHang(t *testing.T, protocol int, mode SyncMode) {
+ master := newTester()
+ defer master.terminate()
+ chain := testChainBase.shorten(15)
+
+ for i := 0; i < 200; i++ {
+ tester := newTester()
+ tester.peerDb = master.peerDb
+ tester.newPeer("peer", protocol, chain)
+
+ // Whenever the downloader requests headers, flood it with
+ // a lot of unrequested header deliveries.
+ tester.downloader.peers.peers["peer"].peer = &floodingTestPeer{
+ peer: tester.downloader.peers.peers["peer"].peer,
+ tester: tester,
+ }
+ if err := tester.sync("peer", nil, mode); err != nil {
+ t.Errorf("test %d: sync failed: %v", i, err)
+ }
+ tester.terminate()
+ }
+}
+
+type floodingTestPeer struct {
+ peer Peer
+ tester *downloadTester
+}
+
+func (ftp *floodingTestPeer) Head() (common.Hash, *big.Int) { return ftp.peer.Head() }
+func (ftp *floodingTestPeer) RequestHeadersByHash(hash common.Hash, count int, skip int, reverse bool) error {
+ return ftp.peer.RequestHeadersByHash(hash, count, skip, reverse)
+}
+func (ftp *floodingTestPeer) RequestBodies(hashes []common.Hash) error {
+ return ftp.peer.RequestBodies(hashes)
+}
+func (ftp *floodingTestPeer) RequestReceipts(hashes []common.Hash) error {
+ return ftp.peer.RequestReceipts(hashes)
+}
+func (ftp *floodingTestPeer) RequestNodeData(hashes []common.Hash) error {
+ return ftp.peer.RequestNodeData(hashes)
+}
+
+func (ftp *floodingTestPeer) RequestHeadersByNumber(from uint64, count, skip int, reverse bool) error {
+ deliveriesDone := make(chan struct{}, 500)
+ for i := 0; i < cap(deliveriesDone)-1; i++ {
+ peer := fmt.Sprintf("fake-peer%d", i)
+ go func() {
+ ftp.tester.downloader.DeliverHeaders(peer, []*types.Header{{}, {}, {}, {}})
+ deliveriesDone <- struct{}{}
+ }()
+ }
+
+ // None of the extra deliveries should block.
+ timeout := time.After(60 * time.Second)
+ launched := false
+ for i := 0; i < cap(deliveriesDone); i++ {
+ select {
+ case <-deliveriesDone:
+ if !launched {
+ // Start delivering the requested headers
+ // after one of the flooding responses has arrived.
+ go func() {
+ ftp.peer.RequestHeadersByNumber(from, count, skip, reverse)
+ deliveriesDone <- struct{}{}
+ }()
+ launched = true
+ }
+ case <-timeout:
+ panic("blocked")
+ }
+ }
+ return nil
+}
generated by cgit (git 2.34.1) at 2024-10-12 08:16:12 +0800