eth/downloader: support individual peers in the test suite
This commit is contained in:
Péter Szilágyi
parent
2937903299
commit
2dd6a62f67
@ -16,6 +16,8 @@ var (
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knownHash = common.Hash{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
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unknownHash = common.Hash{9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9}
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bannedHash = common.Hash{5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5}
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genesis = createBlock(1, common.Hash{}, knownHash)
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)
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func createHashes(start, amount int) (hashes []common.Hash) {
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@ -51,26 +53,20 @@ func createBlocksFromHashes(hashes []common.Hash) map[common.Hash]*types.Block {
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type downloadTester struct {
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downloader *Downloader
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hashes []common.Hash // Chain of hashes simulating
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blocks map[common.Hash]*types.Block // Blocks associated with the hashes
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chain []common.Hash // Block-chain being constructed
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ownHashes []common.Hash // Hash chain belonging to the tester
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ownBlocks map[common.Hash]*types.Block // Blocks belonging to the tester
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peerHashes map[string][]common.Hash // Hash chain belonging to different test peers
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peerBlocks map[string]map[common.Hash]*types.Block // Blocks belonging to different test peers
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maxHashFetch int // Overrides the maximum number of retrieved hashes
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t *testing.T
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done chan bool
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activePeerId string
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}
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func newTester(t *testing.T, hashes []common.Hash, blocks map[common.Hash]*types.Block) *downloadTester {
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func newTester() *downloadTester {
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tester := &downloadTester{
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t: t,
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hashes: hashes,
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blocks: blocks,
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chain: []common.Hash{knownHash},
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done: make(chan bool),
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ownHashes: []common.Hash{knownHash},
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ownBlocks: map[common.Hash]*types.Block{knownHash: genesis},
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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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var mux event.TypeMux
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downloader := New(&mux, tester.hasBlock, tester.getBlock, nil)
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@ -79,13 +75,6 @@ func newTester(t *testing.T, hashes []common.Hash, blocks map[common.Hash]*types
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return tester
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}
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// sync is a simple wrapper around the downloader to start synchronisation and
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// block until it returns
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func (dl *downloadTester) sync(peerId string, head common.Hash) error {
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dl.activePeerId = peerId
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return dl.downloader.synchronise(peerId, head)
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}
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// syncTake is starts synchronising with a remote peer, but concurrently it also
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// starts fetching blocks that the downloader retrieved. IT blocks until both go
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// routines terminate.
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@ -102,12 +91,17 @@ func (dl *downloadTester) syncTake(peerId string, head common.Hash) ([]*Block, e
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time.Sleep(time.Millisecond)
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}
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// Take a batch of blocks and accumulate
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took = append(took, dl.downloader.TakeBlocks()...)
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blocks := dl.downloader.TakeBlocks()
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for _, block := range blocks {
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dl.ownHashes = append(dl.ownHashes, block.RawBlock.Hash())
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dl.ownBlocks[block.RawBlock.Hash()] = block.RawBlock
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}
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took = append(took, blocks...)
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}
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done <- struct{}{}
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}()
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// Start the downloading, sync the taker and return
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err := dl.sync(peerId, head)
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err := dl.downloader.synchronise(peerId, head)
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done <- struct{}{}
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<-done
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@ -115,65 +109,76 @@ func (dl *downloadTester) syncTake(peerId string, head common.Hash) ([]*Block, e
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return took, err
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}
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// hasBlock checks if a block is present in the testers canonical chain.
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func (dl *downloadTester) hasBlock(hash common.Hash) bool {
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for _, h := range dl.chain {
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if h == hash {
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return true
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}
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}
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return false
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return dl.getBlock(hash) != nil
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}
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// getBlock retrieves a block from the testers canonical chain.
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func (dl *downloadTester) getBlock(hash common.Hash) *types.Block {
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return dl.blocks[knownHash]
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return dl.ownBlocks[hash]
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}
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// getHashes retrieves a batch of hashes for reconstructing the chain.
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func (dl *downloadTester) getHashes(head common.Hash) error {
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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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err := dl.downloader.RegisterPeer(id, hashes[0], dl.peerGetHashesFn(id), dl.peerGetBlocksFn(id))
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if err == nil {
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// Assign the owned hashes and blocks to the peer
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dl.peerHashes[id] = hashes
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dl.peerBlocks[id] = blocks
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}
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return err
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}
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// peerGetBlocksFn constructs a getHashes 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 hashes from the particularly requested peer.
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func (dl *downloadTester) peerGetHashesFn(id string) func(head common.Hash) error {
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return func(head common.Hash) error {
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limit := MaxHashFetch
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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 := make([]common.Hash, 0, limit)
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for i, hash := range dl.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, hash := range hashes {
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if hash == head {
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i++
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for len(hashes) < cap(hashes) && i < len(dl.hashes) {
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hashes = append(hashes, dl.hashes[i])
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for len(result) < cap(result) && i < len(hashes) {
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result = append(result, hashes[i])
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i++
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}
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break
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}
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}
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// Delay delivery a bit to allow attacks to unfold
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id := dl.activePeerId
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go func() {
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time.Sleep(time.Millisecond)
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dl.downloader.DeliverHashes(id, hashes)
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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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func (dl *downloadTester) getBlocks(id string) func([]common.Hash) error {
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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) func([]common.Hash) error {
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return func(hashes []common.Hash) error {
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blocks := make([]*types.Block, 0, len(hashes))
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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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if block, ok := dl.blocks[hash]; ok {
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blocks = append(blocks, block)
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if block, ok := blocks[hash]; ok {
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result = append(result, block)
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}
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}
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go dl.downloader.DeliverBlocks(id, blocks)
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go dl.downloader.DeliverBlocks(id, result)
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return nil
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}
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}
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// newPeer registers a new block download source into the syncer.
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func (dl *downloadTester) newPeer(id string, td *big.Int, hash common.Hash) error {
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return dl.downloader.RegisterPeer(id, hash, dl.getHashes, dl.getBlocks(id))
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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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// Create a small enough block chain to download and the tester
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@ -181,11 +186,11 @@ func TestSynchronisation(t *testing.T) {
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hashes := createHashes(0, targetBlocks)
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blocks := createBlocksFromHashes(hashes)
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tester := newTester(t, hashes, blocks)
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tester.newPeer("peer", big.NewInt(10000), hashes[0])
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tester := newTester()
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tester.newPeer("peer", 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", hashes[0]); err != nil {
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if err := tester.downloader.synchronise("peer", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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if queued := len(tester.downloader.queue.blockPool); queued != targetBlocks {
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@ -200,11 +205,11 @@ func TestBlockTaking(t *testing.T) {
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hashes := createHashes(0, targetBlocks)
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blocks := createBlocksFromHashes(hashes)
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tester := newTester(t, hashes, blocks)
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tester.newPeer("peer", big.NewInt(10000), hashes[0])
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tester := newTester()
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tester.newPeer("peer", hashes, blocks)
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// Synchronise with the peer and test block retrieval
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if err := tester.sync("peer", hashes[0]); err != nil {
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if err := tester.downloader.synchronise("peer", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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if took := tester.downloader.TakeBlocks(); len(took) != targetBlocks {
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@ -214,7 +219,7 @@ func TestBlockTaking(t *testing.T) {
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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(t, nil, nil)
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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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@ -232,11 +237,11 @@ func TestCancel(t *testing.T) {
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hashes := createHashes(0, targetBlocks)
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blocks := createBlocksFromHashes(hashes)
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tester := newTester(t, hashes, blocks)
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tester.newPeer("peer", big.NewInt(10000), hashes[0])
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tester := newTester()
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tester.newPeer("peer", hashes, blocks)
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// Synchronise with the peer, but cancel afterwards
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if err := tester.sync("peer", hashes[0]); err != nil {
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if err := tester.downloader.synchronise("peer", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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if !tester.downloader.Cancel() {
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@ -260,13 +265,13 @@ func TestThrottling(t *testing.T) {
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hashes := createHashes(0, targetBlocks)
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blocks := createBlocksFromHashes(hashes)
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tester := newTester(t, hashes, blocks)
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tester.newPeer("peer", big.NewInt(10000), hashes[0])
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tester := newTester()
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tester.newPeer("peer", hashes, blocks)
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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", hashes[0])
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errc <- tester.downloader.synchronise("peer", hashes[0])
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}()
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// Iteratively take some blocks, always checking the retrieval count
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for total := 0; total < targetBlocks; {
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@ -303,9 +308,9 @@ func TestNonExistingParentAttack(t *testing.T) {
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forged.ParentHeaderHash = unknownHash
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// Try and sync with the malicious node and check that it fails
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tester := newTester(t, hashes, blocks)
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tester.newPeer("attack", big.NewInt(10000), hashes[0])
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if err := tester.sync("attack", hashes[0]); err != nil {
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tester := newTester()
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tester.newPeer("attack", hashes, blocks)
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if err := tester.downloader.synchronise("attack", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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bs := tester.downloader.TakeBlocks()
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@ -319,8 +324,8 @@ func TestNonExistingParentAttack(t *testing.T) {
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// Reconstruct a valid chain, and try to synchronize with it
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forged.ParentHeaderHash = knownHash
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tester.newPeer("valid", big.NewInt(20000), hashes[0])
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if err := tester.sync("valid", hashes[0]); err != nil {
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tester.newPeer("valid", hashes, blocks)
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if err := tester.downloader.synchronise("valid", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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bs = tester.downloader.TakeBlocks()
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@ -341,12 +346,12 @@ func TestRepeatingHashAttack(t *testing.T) {
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forged := hashes[:len(hashes)-1]
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// Try and sync with the malicious node
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tester := newTester(t, forged, blocks)
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tester.newPeer("attack", big.NewInt(10000), forged[0])
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tester := newTester()
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tester.newPeer("attack", forged, blocks)
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errc := make(chan error)
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go func() {
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errc <- tester.sync("attack", hashes[0])
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errc <- tester.downloader.synchronise("attack", hashes[0])
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}()
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// Make sure that syncing returns and does so with a failure
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@ -359,9 +364,8 @@ func TestRepeatingHashAttack(t *testing.T) {
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}
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}
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// Ensure that a valid chain can still pass sync
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tester.hashes = hashes
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tester.newPeer("valid", big.NewInt(20000), hashes[0])
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if err := tester.sync("valid", hashes[0]); err != nil {
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tester.newPeer("valid", hashes, blocks)
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if err := tester.downloader.synchronise("valid", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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}
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@ -377,15 +381,15 @@ func TestNonExistingBlockAttack(t *testing.T) {
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hashes[len(hashes)/2] = unknownHash
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// Try and sync with the malicious node and check that it fails
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tester := newTester(t, hashes, blocks)
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tester.newPeer("attack", big.NewInt(10000), hashes[0])
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if err := tester.sync("attack", hashes[0]); err != errPeersUnavailable {
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tester := newTester()
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tester.newPeer("attack", hashes, blocks)
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if err := tester.downloader.synchronise("attack", hashes[0]); err != errPeersUnavailable {
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t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errPeersUnavailable)
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}
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// Ensure that a valid chain can still pass sync
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hashes[len(hashes)/2] = origin
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tester.newPeer("valid", big.NewInt(20000), hashes[0])
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if err := tester.sync("valid", hashes[0]); err != nil {
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tester.newPeer("valid", hashes, blocks)
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if err := tester.downloader.synchronise("valid", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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}
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@ -408,14 +412,13 @@ func TestInvalidHashOrderAttack(t *testing.T) {
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copy(reverse[blockCacheLimit:], chunk2)
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// Try and sync with the malicious node and check that it fails
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tester := newTester(t, reverse, blocks)
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tester.newPeer("attack", big.NewInt(10000), reverse[0])
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tester := newTester()
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tester.newPeer("attack", reverse, blocks)
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if _, err := tester.syncTake("attack", reverse[0]); err != errInvalidChain {
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t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errInvalidChain)
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}
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// Ensure that a valid chain can still pass sync
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tester.hashes = hashes
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tester.newPeer("valid", big.NewInt(20000), hashes[0])
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tester.newPeer("valid", hashes, blocks)
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if _, err := tester.syncTake("valid", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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@ -431,8 +434,8 @@ func TestMadeupHashChainAttack(t *testing.T) {
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hashes := createHashes(0, 1024*blockCacheLimit)
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// Try and sync with the malicious node and check that it fails
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tester := newTester(t, hashes, nil)
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tester.newPeer("attack", big.NewInt(10000), hashes[0])
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tester := newTester()
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tester.newPeer("attack", hashes, nil)
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if _, err := tester.syncTake("attack", hashes[0]); err != errCrossCheckFailed {
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t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errCrossCheckFailed)
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}
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@ -445,11 +448,11 @@ func TestMadeupHashChainAttack(t *testing.T) {
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func TestMadeupHashChainDrippingAttack(t *testing.T) {
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// Create a random chain of hashes to drip
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hashes := createHashes(0, 16*blockCacheLimit)
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tester := newTester(t, hashes, nil)
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tester := newTester()
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// Try and sync with the attacker, one hash at a time
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tester.maxHashFetch = 1
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tester.newPeer("attack", big.NewInt(10000), hashes[0])
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tester.newPeer("attack", hashes, nil)
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if _, err := tester.syncTake("attack", hashes[0]); err != errStallingPeer {
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t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errStallingPeer)
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}
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@ -473,8 +476,8 @@ func TestMadeupBlockChainAttack(t *testing.T) {
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gapped[i] = hashes[2*i]
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}
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// Try and sync with the malicious node and check that it fails
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tester := newTester(t, gapped, blocks)
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tester.newPeer("attack", big.NewInt(10000), gapped[0])
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tester := newTester()
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tester.newPeer("attack", gapped, blocks)
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if _, err := tester.syncTake("attack", gapped[0]); err != errCrossCheckFailed {
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t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errCrossCheckFailed)
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}
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@ -482,8 +485,7 @@ func TestMadeupBlockChainAttack(t *testing.T) {
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blockSoftTTL = defaultBlockTTL
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crossCheckCycle = defaultCrossCheckCycle
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tester.hashes = hashes
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tester.newPeer("valid", big.NewInt(20000), hashes[0])
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tester.newPeer("valid", hashes, blocks)
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if _, err := tester.syncTake("valid", hashes[0]); err != nil {
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t.Fatalf("failed to synchronise blocks: %v", err)
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}
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@ -507,8 +509,8 @@ func TestMadeupParentBlockChainAttack(t *testing.T) {
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block.ParentHeaderHash = hash // Simulate pointing to already known hash
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}
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// Try and sync with the malicious node and check that it fails
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tester := newTester(t, hashes, forges)
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tester.newPeer("attack", big.NewInt(10000), hashes[0])
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tester := newTester()
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tester.newPeer("attack", hashes, forges)
|
||||
if _, err := tester.syncTake("attack", hashes[0]); err != errCrossCheckFailed {
|
||||
t.Fatalf("synchronisation error mismatch: have %v, want %v", err, errCrossCheckFailed)
|
||||
}
|
||||
@ -516,8 +518,7 @@ func TestMadeupParentBlockChainAttack(t *testing.T) {
|
||||
blockSoftTTL = defaultBlockTTL
|
||||
crossCheckCycle = defaultCrossCheckCycle
|
||||
|
||||
tester.blocks = blocks
|
||||
tester.newPeer("valid", big.NewInt(20000), hashes[0])
|
||||
tester.newPeer("valid", hashes, blocks)
|
||||
if _, err := tester.syncTake("valid", hashes[0]); err != nil {
|
||||
t.Fatalf("failed to synchronise blocks: %v", err)
|
||||
}
|
||||
@ -534,12 +535,12 @@ func TestBannedChainStarvationAttack(t *testing.T) {
|
||||
blocks := createBlocksFromHashes(hashes)
|
||||
|
||||
// Create the tester and ban the selected hash
|
||||
tester := newTester(t, hashes, blocks)
|
||||
tester := newTester()
|
||||
tester.downloader.banned.Add(bannedHash)
|
||||
|
||||
// Iteratively try to sync, and verify that the banned hash list grows until
|
||||
// the head of the invalid chain is blocked too.
|
||||
tester.newPeer("attack", big.NewInt(10000), hashes[0])
|
||||
tester.newPeer("attack", hashes, blocks)
|
||||
for banned := tester.downloader.banned.Size(); ; {
|
||||
// Try to sync with the attacker, check hash chain failure
|
||||
if _, err := tester.syncTake("attack", hashes[0]); err != errInvalidChain {
|
||||
@ -556,7 +557,7 @@ func TestBannedChainStarvationAttack(t *testing.T) {
|
||||
banned = bans
|
||||
}
|
||||
// Check that after banning an entire chain, bad peers get dropped
|
||||
if err := tester.newPeer("new attacker", big.NewInt(10000), hashes[0]); err != errBannedHead {
|
||||
if err := tester.newPeer("new attacker", hashes, blocks); err != errBannedHead {
|
||||
t.Fatalf("peer registration mismatch: have %v, want %v", err, errBannedHead)
|
||||
}
|
||||
if peer := tester.downloader.peers.Peer("net attacker"); peer != nil {
|
||||
@ -579,12 +580,12 @@ func TestBannedChainMemoryExhaustionAttack(t *testing.T) {
|
||||
blocks := createBlocksFromHashes(hashes)
|
||||
|
||||
// Create the tester and ban the selected hash
|
||||
tester := newTester(t, hashes, blocks)
|
||||
tester := newTester()
|
||||
tester.downloader.banned.Add(bannedHash)
|
||||
|
||||
// Iteratively try to sync, and verify that the banned hash list grows until
|
||||
// the head of the invalid chain is blocked too.
|
||||
tester.newPeer("attack", big.NewInt(10000), hashes[0])
|
||||
tester.newPeer("attack", hashes, blocks)
|
||||
for {
|
||||
// Try to sync with the attacker, check hash chain failure
|
||||
if _, err := tester.syncTake("attack", hashes[0]); err != errInvalidChain {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user