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@ -21,7 +21,7 @@ var ( |
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genesis = core.GenesisBlockForTesting(testdb, common.Address{}, big.NewInt(0)) |
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) |
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// makeChain creates a chain of n blocks starting at and including
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// makeChain creates a chain of n blocks starting at but not including
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// parent. the returned hash chain is ordered head->parent.
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func makeChain(n int, seed byte, parent *types.Block) ([]common.Hash, map[common.Hash]*types.Block) { |
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blocks := core.GenerateChain(parent, testdb, n, func(i int, gen *core.BlockGen) { |
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@ -42,7 +42,7 @@ func makeChain(n int, seed byte, parent *types.Block) ([]common.Hash, map[common |
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// h2[:f] are different but have a common suffix of length n-f.
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func makeChainFork(n, f int, parent *types.Block) (h1, h2 []common.Hash, b1, b2 map[common.Hash]*types.Block) { |
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// Create the common suffix.
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h, b := makeChain(n-f-1, 0, parent) |
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h, b := makeChain(n-f, 0, parent) |
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// Create the forks.
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h1, b1 = makeChain(f, 1, b[h[0]]) |
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h1 = append(h1, h[1:]...) |
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@ -75,7 +75,7 @@ func newTester() *downloadTester { |
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peerHashes: make(map[string][]common.Hash), |
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peerBlocks: make(map[string]map[common.Hash]*types.Block), |
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} |
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tester.downloader = New(new(event.TypeMux), tester.hasBlock, tester.getBlock, tester.insertChain, tester.dropPeer) |
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tester.downloader = New(new(event.TypeMux), tester.hasBlock, tester.getBlock, tester.headBlock, tester.insertChain, tester.dropPeer) |
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return tester |
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} |
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@ -99,6 +99,11 @@ func (dl *downloadTester) getBlock(hash common.Hash) *types.Block { |
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return dl.ownBlocks[hash] |
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} |
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// headBlock retrieves the current head block from the canonical chain.
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func (dl *downloadTester) headBlock() *types.Block { |
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return dl.getBlock(dl.ownHashes[len(dl.ownHashes)-1]) |
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} |
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// insertChain injects a new batch of blocks into the simulated chain.
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func (dl *downloadTester) insertChain(blocks types.Blocks) (int, error) { |
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for i, block := range blocks { |
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@ -112,15 +117,15 @@ func (dl *downloadTester) insertChain(blocks types.Blocks) (int, error) { |
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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, hashes []common.Hash, blocks map[common.Hash]*types.Block) error { |
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return dl.newSlowPeer(id, hashes, blocks, 0) |
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func (dl *downloadTester) newPeer(id string, version int, hashes []common.Hash, blocks map[common.Hash]*types.Block) error { |
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return dl.newSlowPeer(id, version, hashes, blocks, 0) |
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} |
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// newSlowPeer registers a new block download source into the downloader, with a
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// specific delay time on processing the network packets sent to it, simulating
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// potentially slow network IO.
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func (dl *downloadTester) newSlowPeer(id string, hashes []common.Hash, blocks map[common.Hash]*types.Block, delay time.Duration) error { |
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err := dl.downloader.RegisterPeer(id, hashes[0], dl.peerGetHashesFn(id, delay), dl.peerGetBlocksFn(id, delay)) |
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func (dl *downloadTester) newSlowPeer(id string, version int, hashes []common.Hash, blocks map[common.Hash]*types.Block, delay time.Duration) error { |
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err := dl.downloader.RegisterPeer(id, version, hashes[0], dl.peerGetRelHashesFn(id, delay), dl.peerGetAbsHashesFn(id, version, delay), dl.peerGetBlocksFn(id, delay)) |
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if err == nil { |
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// Assign the owned hashes and blocks to the peer (deep copy)
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dl.peerHashes[id] = make([]common.Hash, len(hashes)) |
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@ -141,10 +146,10 @@ func (dl *downloadTester) dropPeer(id string) { |
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dl.downloader.UnregisterPeer(id) |
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} |
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// peerGetBlocksFn constructs a getHashes function associated with a particular
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// peerGetRelHashesFn constructs a GetHashes function associated with a specific
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// peer in the download tester. The returned function can be used to retrieve
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// batches of hashes from the particularly requested peer.
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func (dl *downloadTester) peerGetHashesFn(id string, delay time.Duration) func(head common.Hash) error { |
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func (dl *downloadTester) peerGetRelHashesFn(id string, delay time.Duration) func(head common.Hash) error { |
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return func(head common.Hash) error { |
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time.Sleep(delay) |
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@ -174,13 +179,43 @@ func (dl *downloadTester) peerGetHashesFn(id string, delay time.Duration) func(h |
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} |
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} |
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// peerGetAbsHashesFn constructs a GetHashesFromNumber function associated with
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// a particular peer in the download tester. The returned function can be used to
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// retrieve batches of hashes from the particularly requested peer.
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func (dl *downloadTester) peerGetAbsHashesFn(id string, version int, delay time.Duration) func(uint64, int) error { |
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// If the simulated peer runs eth/60, this message is not supported
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if version == eth60 { |
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return func(uint64, int) error { return nil } |
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} |
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// Otherwise create a method to request the blocks by number
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return func(head uint64, count int) error { |
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time.Sleep(delay) |
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limit := count |
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if dl.maxHashFetch > 0 { |
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limit = dl.maxHashFetch |
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} |
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// Gather the next batch of hashes
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hashes := dl.peerHashes[id] |
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result := make([]common.Hash, 0, limit) |
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for i := 0; i < limit && len(hashes)-int(head)-1-i >= 0; i++ { |
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result = append(result, hashes[len(hashes)-int(head)-1-i]) |
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} |
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// Delay delivery a bit to allow attacks to unfold
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go func() { |
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time.Sleep(time.Millisecond) |
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dl.downloader.DeliverHashes(id, result) |
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}() |
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return nil |
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} |
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} |
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// peerGetBlocksFn constructs a getBlocks function 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 blocks from the particularly requested peer.
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func (dl *downloadTester) peerGetBlocksFn(id string, delay time.Duration) func([]common.Hash) error { |
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return func(hashes []common.Hash) error { |
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time.Sleep(delay) |
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blocks := dl.peerBlocks[id] |
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result := make([]*types.Block, 0, len(hashes)) |
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for _, hash := range hashes { |
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@ -195,13 +230,13 @@ func (dl *downloadTester) peerGetBlocksFn(id string, delay time.Duration) func([ |
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} |
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// Tests that simple synchronization, without throttling from a good peer works.
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func TestSynchronisation(t *testing.T) { |
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func TestSynchronisation60(t *testing.T) { |
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// Create a small enough block chain to download and the tester
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targetBlocks := blockCacheLimit - 15 |
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hashes, blocks := makeChain(targetBlocks, 0, genesis) |
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tester := newTester() |
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tester.newPeer("peer", hashes, blocks) |
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tester.newPeer("peer", eth60, hashes, blocks) |
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// Synchronise with the peer and make sure all blocks were retrieved
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if err := tester.sync("peer"); err != nil { |
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@ -212,42 +247,79 @@ func TestSynchronisation(t *testing.T) { |
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} |
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} |
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// Tests that an inactive downloader will not accept incoming hashes and blocks.
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func TestInactiveDownloader(t *testing.T) { |
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// Tests that simple synchronization against a canonical chain works correctly.
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// In this test common ancestor lookup should be short circuited and not require
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// binary searching.
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func TestCanonicalSynchronisation(t *testing.T) { |
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// Create a small enough block chain to download
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targetBlocks := blockCacheLimit - 15 |
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hashes, blocks := makeChain(targetBlocks, 0, genesis) |
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tester := newTester() |
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tester.newPeer("peer", eth61, hashes, blocks) |
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// Check that neither hashes nor blocks are accepted
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if err := tester.downloader.DeliverHashes("bad peer", []common.Hash{}); err != errNoSyncActive { |
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t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive) |
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// Synchronise with the peer and make sure all blocks were retrieved
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if err := tester.sync("peer"); err != nil { |
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t.Fatalf("failed to synchronise blocks: %v", err) |
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} |
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if err := tester.downloader.DeliverBlocks("bad peer", []*types.Block{}); err != errNoSyncActive { |
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t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive) |
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if imported := len(tester.ownBlocks); imported != targetBlocks+1 { |
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t.Fatalf("synchronised block mismatch: have %v, want %v", imported, targetBlocks+1) |
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} |
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} |
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// Tests that a canceled download wipes all previously accumulated state.
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func TestCancel(t *testing.T) { |
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// Create a small enough block chain to download and the tester
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targetBlocks := blockCacheLimit - 15 |
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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 TestThrottling60(t *testing.T) { |
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// Create a long block chain to download and the tester
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targetBlocks := 8 * blockCacheLimit |
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hashes, blocks := makeChain(targetBlocks, 0, genesis) |
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tester := newTester() |
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tester.newPeer("peer", hashes, blocks) |
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tester.newPeer("peer", eth60, hashes, blocks) |
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// Make sure canceling works with a pristine downloader
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tester.downloader.cancel() |
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hashCount, blockCount := tester.downloader.queue.Size() |
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if hashCount > 0 || blockCount > 0 { |
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t.Errorf("block or hash count mismatch: %d hashes, %d blocks, want 0", hashCount, blockCount) |
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// Wrap the importer to allow stepping
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done := make(chan int) |
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tester.downloader.insertChain = func(blocks types.Blocks) (int, error) { |
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n, err := tester.insertChain(blocks) |
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done <- n |
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return n, err |
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} |
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// Synchronise with the peer, but cancel afterwards
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if err := tester.sync("peer"); err != nil { |
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t.Fatalf("failed to synchronise blocks: %v", err) |
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// Start a synchronisation concurrently
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errc := make(chan error) |
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go func() { |
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errc <- tester.sync("peer") |
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}() |
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// Iteratively take some blocks, always checking the retrieval count
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for len(tester.ownBlocks) < targetBlocks+1 { |
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// Wait a bit for sync to throttle itself
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var cached 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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cached = len(tester.downloader.queue.blockPool) |
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if cached == blockCacheLimit || len(tester.ownBlocks)+cached == targetBlocks+1 { |
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break |
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} |
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tester.downloader.cancel() |
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hashCount, blockCount = tester.downloader.queue.Size() |
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if hashCount > 0 || blockCount > 0 { |
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t.Errorf("block or hash count mismatch: %d hashes, %d blocks, want 0", hashCount, blockCount) |
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} |
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// Make sure we filled up the cache, then exhaust it
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time.Sleep(25 * time.Millisecond) // give it a chance to screw up
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if cached != blockCacheLimit && len(tester.ownBlocks)+cached < targetBlocks+1 { |
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t.Fatalf("block count mismatch: have %v, want %v", cached, blockCacheLimit) |
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} |
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<-done // finish previous blocking import
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for cached > maxBlockProcess { |
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cached -= <-done |
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} |
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time.Sleep(25 * time.Millisecond) // yield to the insertion
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} |
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<-done // finish the last blocking import
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// Check that we haven't pulled more blocks than available
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if len(tester.ownBlocks) > targetBlocks+1 { |
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t.Fatalf("target block count mismatch: have %v, want %v", len(tester.ownBlocks), targetBlocks+1) |
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} |
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if err := <-errc; err != nil { |
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t.Fatalf("block synchronization failed: %v", err) |
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} |
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} |
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@ -259,7 +331,7 @@ func TestThrottling(t *testing.T) { |
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hashes, blocks := makeChain(targetBlocks, 0, genesis) |
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tester := newTester() |
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tester.newPeer("peer", hashes, blocks) |
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tester.newPeer("peer", eth61, hashes, blocks) |
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// Wrap the importer to allow stepping
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done := make(chan int) |
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@ -307,6 +379,102 @@ func TestThrottling(t *testing.T) { |
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} |
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} |
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// Tests that simple synchronization against a forked chain works correctly. In
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// this test common ancestor lookup should *not* be short circuited, and a full
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// binary search should be executed.
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func TestForkedSynchronisation(t *testing.T) { |
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// Create a long enough forked chain
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common, fork := MaxHashFetch, 2*MaxHashFetch |
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hashesA, hashesB, blocksA, blocksB := makeChainFork(common+fork, fork, genesis) |
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tester := newTester() |
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tester.newPeer("fork A", eth61, hashesA, blocksA) |
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tester.newPeer("fork B", eth61, hashesB, blocksB) |
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// Synchronise with the peer and make sure all blocks were retrieved
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if err := tester.sync("fork A"); err != nil { |
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t.Fatalf("failed to synchronise blocks: %v", err) |
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} |
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if imported := len(tester.ownBlocks); imported != common+fork+1 { |
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t.Fatalf("synchronised block mismatch: have %v, want %v", imported, common+fork+1) |
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} |
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// Synchronise with the second peer and make sure that fork is pulled too
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if err := tester.sync("fork B"); err != nil { |
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t.Fatalf("failed to synchronise blocks: %v", err) |
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} |
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if imported := len(tester.ownBlocks); imported != common+2*fork+1 { |
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t.Fatalf("synchronised block mismatch: have %v, want %v", imported, common+2*fork+1) |
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} |
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} |
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// Tests that an inactive downloader will not accept incoming hashes and blocks.
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func TestInactiveDownloader(t *testing.T) { |
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tester := newTester() |
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// Check that neither hashes nor blocks are accepted
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if err := tester.downloader.DeliverHashes("bad peer", []common.Hash{}); err != errNoSyncActive { |
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t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive) |
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} |
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if err := tester.downloader.DeliverBlocks("bad peer", []*types.Block{}); err != errNoSyncActive { |
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t.Errorf("error mismatch: have %v, want %v", err, errNoSyncActive) |
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} |
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} |
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// Tests that a canceled download wipes all previously accumulated state.
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func TestCancel60(t *testing.T) { |
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// Create a small enough block chain to download and the tester
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targetBlocks := blockCacheLimit - 15 |
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hashes, blocks := makeChain(targetBlocks, 0, genesis) |
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tester := newTester() |
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tester.newPeer("peer", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
// Make sure canceling works with a pristine downloader
|
|
|
|
|
tester.downloader.cancel() |
|
|
|
|
hashCount, blockCount := tester.downloader.queue.Size() |
|
|
|
|
if hashCount > 0 || blockCount > 0 { |
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|
|
|
t.Errorf("block or hash count mismatch: %d hashes, %d blocks, want 0", hashCount, blockCount) |
|
|
|
|
} |
|
|
|
|
// Synchronise with the peer, but cancel afterwards
|
|
|
|
|
if err := tester.sync("peer"); err != nil { |
|
|
|
|
t.Fatalf("failed to synchronise blocks: %v", err) |
|
|
|
|
} |
|
|
|
|
tester.downloader.cancel() |
|
|
|
|
hashCount, blockCount = tester.downloader.queue.Size() |
|
|
|
|
if hashCount > 0 || blockCount > 0 { |
|
|
|
|
t.Errorf("block or hash count mismatch: %d hashes, %d blocks, want 0", hashCount, blockCount) |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
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|
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|
// Tests that a canceled download wipes all previously accumulated state.
|
|
|
|
|
func TestCancel(t *testing.T) { |
|
|
|
|
// Create a small enough block chain to download and the tester
|
|
|
|
|
targetBlocks := blockCacheLimit - 15 |
|
|
|
|
if targetBlocks >= MaxHashFetch { |
|
|
|
|
targetBlocks = MaxHashFetch - 15 |
|
|
|
|
} |
|
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|
hashes, blocks := makeChain(targetBlocks, 0, genesis) |
|
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|
|
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|
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|
tester := newTester() |
|
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|
tester.newPeer("peer", eth61, hashes, blocks) |
|
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|
|
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|
// Make sure canceling works with a pristine downloader
|
|
|
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|
tester.downloader.cancel() |
|
|
|
|
hashCount, blockCount := tester.downloader.queue.Size() |
|
|
|
|
if hashCount > 0 || blockCount > 0 { |
|
|
|
|
t.Errorf("block or hash count mismatch: %d hashes, %d blocks, want 0", hashCount, blockCount) |
|
|
|
|
} |
|
|
|
|
// Synchronise with the peer, but cancel afterwards
|
|
|
|
|
if err := tester.sync("peer"); err != nil { |
|
|
|
|
t.Fatalf("failed to synchronise blocks: %v", err) |
|
|
|
|
} |
|
|
|
|
tester.downloader.cancel() |
|
|
|
|
hashCount, blockCount = tester.downloader.queue.Size() |
|
|
|
|
if hashCount > 0 || blockCount > 0 { |
|
|
|
|
t.Errorf("block or hash count mismatch: %d hashes, %d blocks, want 0", hashCount, blockCount) |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
// Tests that synchronisation from multiple peers works as intended (multi thread sanity test).
|
|
|
|
|
func TestMultiSynchronisation(t *testing.T) { |
|
|
|
|
// Create various peers with various parts of the chain
|
|
|
|
|
@ -317,7 +485,7 @@ func TestMultiSynchronisation(t *testing.T) { |
|
|
|
|
tester := newTester() |
|
|
|
|
for i := 0; i < targetPeers; i++ { |
|
|
|
|
id := fmt.Sprintf("peer #%d", i) |
|
|
|
|
tester.newPeer(id, hashes[i*blockCacheLimit:], blocks) |
|
|
|
|
tester.newPeer(id, eth60, hashes[i*blockCacheLimit:], blocks) |
|
|
|
|
} |
|
|
|
|
// Synchronise with the middle peer and make sure half of the blocks were retrieved
|
|
|
|
|
id := fmt.Sprintf("peer #%d", targetPeers/2) |
|
|
|
|
@ -347,8 +515,8 @@ func TestSlowSynchronisation(t *testing.T) { |
|
|
|
|
targetIODelay := time.Second |
|
|
|
|
hashes, blocks := makeChain(targetBlocks, 0, genesis) |
|
|
|
|
|
|
|
|
|
tester.newSlowPeer("fast", hashes, blocks, 0) |
|
|
|
|
tester.newSlowPeer("slow", hashes, blocks, targetIODelay) |
|
|
|
|
tester.newSlowPeer("fast", eth60, hashes, blocks, 0) |
|
|
|
|
tester.newSlowPeer("slow", eth60, hashes, blocks, targetIODelay) |
|
|
|
|
|
|
|
|
|
// Try to sync with the peers (pull hashes from fast)
|
|
|
|
|
start := time.Now() |
|
|
|
|
@ -370,13 +538,14 @@ func TestSlowSynchronisation(t *testing.T) { |
|
|
|
|
func TestNonExistingParentAttack(t *testing.T) { |
|
|
|
|
tester := newTester() |
|
|
|
|
|
|
|
|
|
// Forge a single-link chain with a forged header
|
|
|
|
|
hashes, blocks := makeChain(1, 0, genesis) |
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
wrongblock := types.NewBlock(&types.Header{}, nil, nil, nil) |
|
|
|
|
wrongblock.Td = blocks[hashes[0]].Td |
|
|
|
|
hashes, blocks = makeChain(1, 0, wrongblock) |
|
|
|
|
tester.newPeer("attack", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
// Try and sync with the malicious node and check that it fails
|
|
|
|
|
if err := tester.sync("attack"); err == nil { |
|
|
|
|
@ -401,8 +570,8 @@ func TestRepeatingHashAttack(t *testing.T) { // TODO: Is this thing valid?? |
|
|
|
|
|
|
|
|
|
// Create a valid chain, but drop the last link
|
|
|
|
|
hashes, blocks := makeChain(blockCacheLimit, 0, genesis) |
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", hashes[:len(hashes)-1], blocks) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, hashes[:len(hashes)-1], blocks) |
|
|
|
|
|
|
|
|
|
// Try and sync with the malicious node
|
|
|
|
|
errc := make(chan error) |
|
|
|
|
@ -431,10 +600,10 @@ func TestNonExistingBlockAttack(t *testing.T) { |
|
|
|
|
|
|
|
|
|
// Create a valid chain, but forge the last link
|
|
|
|
|
hashes, blocks := makeChain(blockCacheLimit, 0, genesis) |
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
hashes[len(hashes)/2] = common.Hash{} |
|
|
|
|
tester.newPeer("attack", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
// Try and sync with the malicious node and check that it fails
|
|
|
|
|
if err := tester.sync("attack"); err != errPeersUnavailable { |
|
|
|
|
@ -453,7 +622,7 @@ func TestInvalidHashOrderAttack(t *testing.T) { |
|
|
|
|
|
|
|
|
|
// Create a valid long chain, but reverse some hashes within
|
|
|
|
|
hashes, blocks := makeChain(4*blockCacheLimit, 0, genesis) |
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
chunk1 := make([]common.Hash, blockCacheLimit) |
|
|
|
|
chunk2 := make([]common.Hash, blockCacheLimit) |
|
|
|
|
@ -462,7 +631,7 @@ func TestInvalidHashOrderAttack(t *testing.T) { |
|
|
|
|
|
|
|
|
|
copy(hashes[2*blockCacheLimit:], chunk1) |
|
|
|
|
copy(hashes[blockCacheLimit:], chunk2) |
|
|
|
|
tester.newPeer("attack", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
// Try and sync with the malicious node and check that it fails
|
|
|
|
|
if err := tester.sync("attack"); err != errInvalidChain { |
|
|
|
|
@ -489,8 +658,8 @@ func TestMadeupHashChainAttack(t *testing.T) { |
|
|
|
|
rand.Read(randomHashes[i][:]) |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", randomHashes, nil) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, randomHashes, nil) |
|
|
|
|
|
|
|
|
|
// Try and sync with the malicious node and check that it fails
|
|
|
|
|
if err := tester.sync("attack"); err != errCrossCheckFailed { |
|
|
|
|
@ -517,7 +686,7 @@ func TestMadeupHashChainDrippingAttack(t *testing.T) { |
|
|
|
|
|
|
|
|
|
// Try and sync with the attacker, one hash at a time
|
|
|
|
|
tester.maxHashFetch = 1 |
|
|
|
|
tester.newPeer("attack", randomHashes, nil) |
|
|
|
|
tester.newPeer("attack", eth60, randomHashes, nil) |
|
|
|
|
if err := tester.sync("attack"); err != errStallingPeer { |
|
|
|
|
t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errStallingPeer) |
|
|
|
|
} |
|
|
|
|
@ -540,7 +709,7 @@ func TestMadeupBlockChainAttack(t *testing.T) { |
|
|
|
|
} |
|
|
|
|
// Try and sync with the malicious node and check that it fails
|
|
|
|
|
tester := newTester() |
|
|
|
|
tester.newPeer("attack", gapped, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, gapped, blocks) |
|
|
|
|
if err := tester.sync("attack"); err != errCrossCheckFailed { |
|
|
|
|
t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errCrossCheckFailed) |
|
|
|
|
} |
|
|
|
|
@ -548,13 +717,13 @@ func TestMadeupBlockChainAttack(t *testing.T) { |
|
|
|
|
blockSoftTTL = defaultBlockTTL |
|
|
|
|
crossCheckCycle = defaultCrossCheckCycle |
|
|
|
|
|
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
if err := tester.sync("valid"); err != nil { |
|
|
|
|
t.Fatalf("failed to synchronise blocks: %v", err) |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
// tests that if one/multiple malicious peers try to feed a banned blockchain to
|
|
|
|
|
// Tests that if one/multiple malicious peers try to feed a banned blockchain to
|
|
|
|
|
// the downloader, it will not keep refetching the same chain indefinitely, but
|
|
|
|
|
// gradually block pieces of it, until its head is also blocked.
|
|
|
|
|
func TestBannedChainStarvationAttack(t *testing.T) { |
|
|
|
|
@ -565,8 +734,8 @@ func TestBannedChainStarvationAttack(t *testing.T) { |
|
|
|
|
// Create the tester and ban the selected hash.
|
|
|
|
|
tester := newTester() |
|
|
|
|
tester.downloader.banned.Add(forkHashes[fork-1]) |
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", forkHashes, forkBlocks) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, forkHashes, forkBlocks) |
|
|
|
|
|
|
|
|
|
// Iteratively try to sync, and verify that the banned hash list grows until
|
|
|
|
|
// the head of the invalid chain is blocked too.
|
|
|
|
|
@ -586,7 +755,7 @@ func TestBannedChainStarvationAttack(t *testing.T) { |
|
|
|
|
banned = bans |
|
|
|
|
} |
|
|
|
|
// Check that after banning an entire chain, bad peers get dropped
|
|
|
|
|
if err := tester.newPeer("new attacker", forkHashes, forkBlocks); err != errBannedHead { |
|
|
|
|
if err := tester.newPeer("new attacker", eth60, forkHashes, forkBlocks); err != errBannedHead { |
|
|
|
|
t.Fatalf("peer registration mismatch: have %v, want %v", err, errBannedHead) |
|
|
|
|
} |
|
|
|
|
if peer := tester.downloader.peers.Peer("new attacker"); peer != nil { |
|
|
|
|
@ -618,8 +787,8 @@ func TestBannedChainMemoryExhaustionAttack(t *testing.T) { |
|
|
|
|
MaxBlockFetch = 4 |
|
|
|
|
maxBannedHashes = 256 |
|
|
|
|
|
|
|
|
|
tester.newPeer("valid", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", forkHashes, forkBlocks) |
|
|
|
|
tester.newPeer("valid", eth60, hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, forkHashes, forkBlocks) |
|
|
|
|
|
|
|
|
|
// Iteratively try to sync, and verify that the banned hash list grows until
|
|
|
|
|
// the head of the invalid chain is blocked too.
|
|
|
|
|
@ -664,7 +833,7 @@ func TestOverlappingDeliveryAttack(t *testing.T) { |
|
|
|
|
|
|
|
|
|
// Register an attacker that always returns non-requested blocks too
|
|
|
|
|
tester := newTester() |
|
|
|
|
tester.newPeer("attack", hashes, blocks) |
|
|
|
|
tester.newPeer("attack", eth60, hashes, blocks) |
|
|
|
|
|
|
|
|
|
rawGetBlocks := tester.downloader.peers.Peer("attack").getBlocks |
|
|
|
|
tester.downloader.peers.Peer("attack").getBlocks = func(request []common.Hash) error { |
|
|
|
|
@ -712,7 +881,7 @@ func TestHashAttackerDropping(t *testing.T) { |
|
|
|
|
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, []common.Hash{genesis.Hash()}, nil); err != nil { |
|
|
|
|
if err := tester.newPeer(id, eth60, []common.Hash{genesis.Hash()}, nil); err != nil { |
|
|
|
|
t.Fatalf("test %d: failed to register new peer: %v", i, err) |
|
|
|
|
} |
|
|
|
|
if _, ok := tester.peerHashes[id]; !ok { |
|
|
|
|
@ -744,7 +913,7 @@ func TestBlockAttackerDropping(t *testing.T) { |
|
|
|
|
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, []common.Hash{common.Hash{}}, nil); err != nil { |
|
|
|
|
if err := tester.newPeer(id, eth60, []common.Hash{common.Hash{}}, nil); err != nil { |
|
|
|
|
t.Fatalf("test %d: failed to register new peer: %v", i, err) |
|
|
|
|
} |
|
|
|
|
if _, ok := tester.peerHashes[id]; !ok { |
|
|
|
|
|
Jeffrey Wilcke
9 years ago