c12f4df910
Reworked the EVM gas instructions to use 64bit integers rather than arbitrary size big ints. All gas operations, be it additions, multiplications or divisions, are checked and guarded against 64 bit integer overflows. In additon, most of the protocol paramaters in the params package have been converted to uint64 and are now constants rather than variables. * common/math: added overflow check ops * core: vmenv, env renamed to evm * eth, internal/ethapi, les: unmetered eth_call and cancel methods * core/vm: implemented big.Int pool for evm instructions * core/vm: unexported intPool methods & verification methods * core/vm: added memoryGasCost overflow check and test
781 lines
30 KiB
Go
781 lines
30 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package fetcher
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import (
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"errors"
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"math/big"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/params"
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)
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var (
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testdb, _ = ethdb.NewMemDatabase()
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testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
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testAddress = crypto.PubkeyToAddress(testKey.PublicKey)
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genesis = core.GenesisBlockForTesting(testdb, testAddress, big.NewInt(1000000000))
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unknownBlock = types.NewBlock(&types.Header{GasLimit: params.GenesisGasLimit}, nil, nil, nil)
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)
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// makeChain creates a chain of n blocks starting at and including parent.
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// the returned hash chain is ordered head->parent. In addition, every 3rd block
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// contains a transaction and every 5th an uncle to allow testing correct block
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// reassembly.
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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(params.TestChainConfig, parent, testdb, n, func(i int, block *core.BlockGen) {
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block.SetCoinbase(common.Address{seed})
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// If the block number is multiple of 3, send a bonus transaction to the miner
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if parent == genesis && i%3 == 0 {
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signer := types.MakeSigner(params.TestChainConfig, block.Number())
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tx, err := types.SignTx(types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), new(big.Int).SetUint64(params.TxGas), nil, nil), signer, testKey)
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if err != nil {
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panic(err)
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}
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block.AddTx(tx)
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}
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// If the block number is a multiple of 5, add a bonus uncle to the block
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if i%5 == 0 {
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block.AddUncle(&types.Header{ParentHash: block.PrevBlock(i - 1).Hash(), Number: big.NewInt(int64(i - 1))})
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}
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})
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hashes := make([]common.Hash, n+1)
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hashes[len(hashes)-1] = parent.Hash()
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blockm := make(map[common.Hash]*types.Block, n+1)
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blockm[parent.Hash()] = parent
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for i, b := range blocks {
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hashes[len(hashes)-i-2] = b.Hash()
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blockm[b.Hash()] = b
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}
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return hashes, blockm
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}
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// fetcherTester is a test simulator for mocking out local block chain.
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type fetcherTester struct {
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fetcher *Fetcher
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hashes []common.Hash // Hash chain belonging to the tester
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blocks map[common.Hash]*types.Block // Blocks belonging to the tester
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drops map[string]bool // Map of peers dropped by the fetcher
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lock sync.RWMutex
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}
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// newTester creates a new fetcher test mocker.
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func newTester() *fetcherTester {
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tester := &fetcherTester{
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hashes: []common.Hash{genesis.Hash()},
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blocks: map[common.Hash]*types.Block{genesis.Hash(): genesis},
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drops: make(map[string]bool),
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}
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tester.fetcher = New(tester.getBlock, tester.verifyBlock, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
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tester.fetcher.Start()
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return tester
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}
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// getBlock retrieves a block from the tester's block chain.
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func (f *fetcherTester) getBlock(hash common.Hash) *types.Block {
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f.lock.RLock()
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defer f.lock.RUnlock()
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return f.blocks[hash]
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}
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// verifyBlock is a nop placeholder for the block header verification.
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func (f *fetcherTester) verifyBlock(block *types.Block, parent *types.Block) error {
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return nil
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}
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// broadcastBlock is a nop placeholder for the block broadcasting.
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func (f *fetcherTester) broadcastBlock(block *types.Block, propagate bool) {
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}
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// chainHeight retrieves the current height (block number) of the chain.
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func (f *fetcherTester) chainHeight() uint64 {
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f.lock.RLock()
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defer f.lock.RUnlock()
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return f.blocks[f.hashes[len(f.hashes)-1]].NumberU64()
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}
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// insertChain injects a new blocks into the simulated chain.
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func (f *fetcherTester) insertChain(blocks types.Blocks) (int, error) {
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f.lock.Lock()
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defer f.lock.Unlock()
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for i, block := range blocks {
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// Make sure the parent in known
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if _, ok := f.blocks[block.ParentHash()]; !ok {
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return i, errors.New("unknown parent")
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}
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// Discard any new blocks if the same height already exists
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if block.NumberU64() <= f.blocks[f.hashes[len(f.hashes)-1]].NumberU64() {
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return i, nil
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}
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// Otherwise build our current chain
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f.hashes = append(f.hashes, block.Hash())
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f.blocks[block.Hash()] = block
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}
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return 0, nil
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}
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// dropPeer is an emulator for the peer removal, simply accumulating the various
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// peers dropped by the fetcher.
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func (f *fetcherTester) dropPeer(peer string) {
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f.lock.Lock()
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defer f.lock.Unlock()
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f.drops[peer] = true
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}
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// makeHeaderFetcher retrieves a block header fetcher associated with a simulated peer.
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func (f *fetcherTester) makeHeaderFetcher(blocks map[common.Hash]*types.Block, drift time.Duration) headerRequesterFn {
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closure := make(map[common.Hash]*types.Block)
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for hash, block := range blocks {
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closure[hash] = block
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}
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// Create a function that return a header from the closure
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return func(hash common.Hash) error {
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// Gather the blocks to return
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headers := make([]*types.Header, 0, 1)
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if block, ok := closure[hash]; ok {
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headers = append(headers, block.Header())
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}
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// Return on a new thread
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go f.fetcher.FilterHeaders(headers, time.Now().Add(drift))
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return nil
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}
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}
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// makeBodyFetcher retrieves a block body fetcher associated with a simulated peer.
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func (f *fetcherTester) makeBodyFetcher(blocks map[common.Hash]*types.Block, drift time.Duration) bodyRequesterFn {
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closure := make(map[common.Hash]*types.Block)
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for hash, block := range blocks {
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closure[hash] = block
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}
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// Create a function that returns blocks from the closure
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return func(hashes []common.Hash) error {
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// Gather the block bodies to return
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transactions := make([][]*types.Transaction, 0, len(hashes))
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uncles := make([][]*types.Header, 0, len(hashes))
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for _, hash := range hashes {
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if block, ok := closure[hash]; ok {
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transactions = append(transactions, block.Transactions())
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uncles = append(uncles, block.Uncles())
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}
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}
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// Return on a new thread
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go f.fetcher.FilterBodies(transactions, uncles, time.Now().Add(drift))
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return nil
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}
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}
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// verifyFetchingEvent verifies that one single event arrive on an fetching channel.
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func verifyFetchingEvent(t *testing.T, fetching chan []common.Hash, arrive bool) {
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if arrive {
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select {
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case <-fetching:
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case <-time.After(time.Second):
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t.Fatalf("fetching timeout")
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}
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} else {
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select {
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case <-fetching:
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t.Fatalf("fetching invoked")
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case <-time.After(10 * time.Millisecond):
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}
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}
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}
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// verifyCompletingEvent verifies that one single event arrive on an completing channel.
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func verifyCompletingEvent(t *testing.T, completing chan []common.Hash, arrive bool) {
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if arrive {
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select {
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case <-completing:
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case <-time.After(time.Second):
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t.Fatalf("completing timeout")
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}
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} else {
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select {
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case <-completing:
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t.Fatalf("completing invoked")
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case <-time.After(10 * time.Millisecond):
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}
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}
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}
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// verifyImportEvent verifies that one single event arrive on an import channel.
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func verifyImportEvent(t *testing.T, imported chan *types.Block, arrive bool) {
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if arrive {
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select {
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case <-imported:
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case <-time.After(time.Second):
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t.Fatalf("import timeout")
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}
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} else {
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select {
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case <-imported:
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t.Fatalf("import invoked")
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case <-time.After(10 * time.Millisecond):
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}
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}
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}
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// verifyImportCount verifies that exactly count number of events arrive on an
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// import hook channel.
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func verifyImportCount(t *testing.T, imported chan *types.Block, count int) {
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for i := 0; i < count; i++ {
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select {
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case <-imported:
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case <-time.After(time.Second):
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t.Fatalf("block %d: import timeout", i+1)
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}
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}
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verifyImportDone(t, imported)
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}
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// verifyImportDone verifies that no more events are arriving on an import channel.
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func verifyImportDone(t *testing.T, imported chan *types.Block) {
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select {
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case <-imported:
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t.Fatalf("extra block imported")
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case <-time.After(50 * time.Millisecond):
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}
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}
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// Tests that a fetcher accepts block announcements and initiates retrievals for
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// them, successfully importing into the local chain.
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func TestSequentialAnnouncements62(t *testing.T) { testSequentialAnnouncements(t, 62) }
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func TestSequentialAnnouncements63(t *testing.T) { testSequentialAnnouncements(t, 63) }
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func TestSequentialAnnouncements64(t *testing.T) { testSequentialAnnouncements(t, 64) }
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func testSequentialAnnouncements(t *testing.T, protocol int) {
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// Create a chain of blocks to import
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targetBlocks := 4 * hashLimit
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hashes, blocks := makeChain(targetBlocks, 0, genesis)
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tester := newTester()
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headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
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bodyFetcher := tester.makeBodyFetcher(blocks, 0)
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// Iteratively announce blocks until all are imported
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imported := make(chan *types.Block)
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tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
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for i := len(hashes) - 2; i >= 0; i-- {
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tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
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verifyImportEvent(t, imported, true)
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}
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verifyImportDone(t, imported)
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}
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// Tests that if blocks are announced by multiple peers (or even the same buggy
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// peer), they will only get downloaded at most once.
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func TestConcurrentAnnouncements62(t *testing.T) { testConcurrentAnnouncements(t, 62) }
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func TestConcurrentAnnouncements63(t *testing.T) { testConcurrentAnnouncements(t, 63) }
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func TestConcurrentAnnouncements64(t *testing.T) { testConcurrentAnnouncements(t, 64) }
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func testConcurrentAnnouncements(t *testing.T, protocol int) {
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// Create a chain of blocks to import
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targetBlocks := 4 * hashLimit
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hashes, blocks := makeChain(targetBlocks, 0, genesis)
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// Assemble a tester with a built in counter for the requests
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tester := newTester()
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headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
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bodyFetcher := tester.makeBodyFetcher(blocks, 0)
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counter := uint32(0)
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headerWrapper := func(hash common.Hash) error {
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atomic.AddUint32(&counter, 1)
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return headerFetcher(hash)
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}
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// Iteratively announce blocks until all are imported
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imported := make(chan *types.Block)
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tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
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for i := len(hashes) - 2; i >= 0; i-- {
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tester.fetcher.Notify("first", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerWrapper, bodyFetcher)
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tester.fetcher.Notify("second", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout+time.Millisecond), headerWrapper, bodyFetcher)
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tester.fetcher.Notify("second", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout-time.Millisecond), headerWrapper, bodyFetcher)
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verifyImportEvent(t, imported, true)
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}
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verifyImportDone(t, imported)
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// Make sure no blocks were retrieved twice
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if int(counter) != targetBlocks {
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t.Fatalf("retrieval count mismatch: have %v, want %v", counter, targetBlocks)
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}
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}
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// Tests that announcements arriving while a previous is being fetched still
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// results in a valid import.
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func TestOverlappingAnnouncements62(t *testing.T) { testOverlappingAnnouncements(t, 62) }
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func TestOverlappingAnnouncements63(t *testing.T) { testOverlappingAnnouncements(t, 63) }
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func TestOverlappingAnnouncements64(t *testing.T) { testOverlappingAnnouncements(t, 64) }
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func testOverlappingAnnouncements(t *testing.T, protocol int) {
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// Create a chain of blocks to import
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targetBlocks := 4 * hashLimit
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hashes, blocks := makeChain(targetBlocks, 0, genesis)
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tester := newTester()
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headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
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bodyFetcher := tester.makeBodyFetcher(blocks, 0)
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// Iteratively announce blocks, but overlap them continuously
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overlap := 16
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imported := make(chan *types.Block, len(hashes)-1)
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for i := 0; i < overlap; i++ {
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imported <- nil
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}
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tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
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for i := len(hashes) - 2; i >= 0; i-- {
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tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
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select {
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case <-imported:
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case <-time.After(time.Second):
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t.Fatalf("block %d: import timeout", len(hashes)-i)
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}
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}
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// Wait for all the imports to complete and check count
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verifyImportCount(t, imported, overlap)
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}
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// Tests that announces already being retrieved will not be duplicated.
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func TestPendingDeduplication62(t *testing.T) { testPendingDeduplication(t, 62) }
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func TestPendingDeduplication63(t *testing.T) { testPendingDeduplication(t, 63) }
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func TestPendingDeduplication64(t *testing.T) { testPendingDeduplication(t, 64) }
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func testPendingDeduplication(t *testing.T, protocol int) {
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// Create a hash and corresponding block
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hashes, blocks := makeChain(1, 0, genesis)
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// Assemble a tester with a built in counter and delayed fetcher
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tester := newTester()
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headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
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bodyFetcher := tester.makeBodyFetcher(blocks, 0)
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delay := 50 * time.Millisecond
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counter := uint32(0)
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headerWrapper := func(hash common.Hash) error {
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atomic.AddUint32(&counter, 1)
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// Simulate a long running fetch
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go func() {
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time.Sleep(delay)
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headerFetcher(hash)
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}()
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return nil
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}
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// Announce the same block many times until it's fetched (wait for any pending ops)
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for tester.getBlock(hashes[0]) == nil {
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tester.fetcher.Notify("repeater", hashes[0], 1, time.Now().Add(-arriveTimeout), headerWrapper, bodyFetcher)
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time.Sleep(time.Millisecond)
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}
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time.Sleep(delay)
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// Check that all blocks were imported and none fetched twice
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if imported := len(tester.blocks); imported != 2 {
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t.Fatalf("synchronised block mismatch: have %v, want %v", imported, 2)
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}
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if int(counter) != 1 {
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t.Fatalf("retrieval count mismatch: have %v, want %v", counter, 1)
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}
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}
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// Tests that announcements retrieved in a random order are cached and eventually
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// imported when all the gaps are filled in.
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func TestRandomArrivalImport62(t *testing.T) { testRandomArrivalImport(t, 62) }
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func TestRandomArrivalImport63(t *testing.T) { testRandomArrivalImport(t, 63) }
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func TestRandomArrivalImport64(t *testing.T) { testRandomArrivalImport(t, 64) }
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func testRandomArrivalImport(t *testing.T, protocol int) {
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// Create a chain of blocks to import, and choose one to delay
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targetBlocks := maxQueueDist
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hashes, blocks := makeChain(targetBlocks, 0, genesis)
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skip := targetBlocks / 2
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tester := newTester()
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headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
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bodyFetcher := tester.makeBodyFetcher(blocks, 0)
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// Iteratively announce blocks, skipping one entry
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imported := make(chan *types.Block, len(hashes)-1)
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tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
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for i := len(hashes) - 1; i >= 0; i-- {
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if i != skip {
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tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
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time.Sleep(time.Millisecond)
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}
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}
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// Finally announce the skipped entry and check full import
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tester.fetcher.Notify("valid", hashes[skip], uint64(len(hashes)-skip-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
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verifyImportCount(t, imported, len(hashes)-1)
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}
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// Tests that direct block enqueues (due to block propagation vs. hash announce)
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// are correctly schedule, filling and import queue gaps.
|
|
func TestQueueGapFill62(t *testing.T) { testQueueGapFill(t, 62) }
|
|
func TestQueueGapFill63(t *testing.T) { testQueueGapFill(t, 63) }
|
|
func TestQueueGapFill64(t *testing.T) { testQueueGapFill(t, 64) }
|
|
|
|
func testQueueGapFill(t *testing.T, protocol int) {
|
|
// Create a chain of blocks to import, and choose one to not announce at all
|
|
targetBlocks := maxQueueDist
|
|
hashes, blocks := makeChain(targetBlocks, 0, genesis)
|
|
skip := targetBlocks / 2
|
|
|
|
tester := newTester()
|
|
headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
|
|
bodyFetcher := tester.makeBodyFetcher(blocks, 0)
|
|
|
|
// Iteratively announce blocks, skipping one entry
|
|
imported := make(chan *types.Block, len(hashes)-1)
|
|
tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
|
|
|
|
for i := len(hashes) - 1; i >= 0; i-- {
|
|
if i != skip {
|
|
tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
|
|
time.Sleep(time.Millisecond)
|
|
}
|
|
}
|
|
// Fill the missing block directly as if propagated
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[skip]])
|
|
verifyImportCount(t, imported, len(hashes)-1)
|
|
}
|
|
|
|
// Tests that blocks arriving from various sources (multiple propagations, hash
|
|
// announces, etc) do not get scheduled for import multiple times.
|
|
func TestImportDeduplication62(t *testing.T) { testImportDeduplication(t, 62) }
|
|
func TestImportDeduplication63(t *testing.T) { testImportDeduplication(t, 63) }
|
|
func TestImportDeduplication64(t *testing.T) { testImportDeduplication(t, 64) }
|
|
|
|
func testImportDeduplication(t *testing.T, protocol int) {
|
|
// Create two blocks to import (one for duplication, the other for stalling)
|
|
hashes, blocks := makeChain(2, 0, genesis)
|
|
|
|
// Create the tester and wrap the importer with a counter
|
|
tester := newTester()
|
|
headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
|
|
bodyFetcher := tester.makeBodyFetcher(blocks, 0)
|
|
|
|
counter := uint32(0)
|
|
tester.fetcher.insertChain = func(blocks types.Blocks) (int, error) {
|
|
atomic.AddUint32(&counter, uint32(len(blocks)))
|
|
return tester.insertChain(blocks)
|
|
}
|
|
// Instrument the fetching and imported events
|
|
fetching := make(chan []common.Hash)
|
|
imported := make(chan *types.Block, len(hashes)-1)
|
|
tester.fetcher.fetchingHook = func(hashes []common.Hash) { fetching <- hashes }
|
|
tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
|
|
|
|
// Announce the duplicating block, wait for retrieval, and also propagate directly
|
|
tester.fetcher.Notify("valid", hashes[0], 1, time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
|
|
<-fetching
|
|
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[0]])
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[0]])
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[0]])
|
|
|
|
// Fill the missing block directly as if propagated, and check import uniqueness
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[1]])
|
|
verifyImportCount(t, imported, 2)
|
|
|
|
if counter != 2 {
|
|
t.Fatalf("import invocation count mismatch: have %v, want %v", counter, 2)
|
|
}
|
|
}
|
|
|
|
// Tests that blocks with numbers much lower or higher than out current head get
|
|
// discarded to prevent wasting resources on useless blocks from faulty peers.
|
|
func TestDistantPropagationDiscarding(t *testing.T) {
|
|
// Create a long chain to import and define the discard boundaries
|
|
hashes, blocks := makeChain(3*maxQueueDist, 0, genesis)
|
|
head := hashes[len(hashes)/2]
|
|
|
|
low, high := len(hashes)/2+maxUncleDist+1, len(hashes)/2-maxQueueDist-1
|
|
|
|
// Create a tester and simulate a head block being the middle of the above chain
|
|
tester := newTester()
|
|
|
|
tester.lock.Lock()
|
|
tester.hashes = []common.Hash{head}
|
|
tester.blocks = map[common.Hash]*types.Block{head: blocks[head]}
|
|
tester.lock.Unlock()
|
|
|
|
// Ensure that a block with a lower number than the threshold is discarded
|
|
tester.fetcher.Enqueue("lower", blocks[hashes[low]])
|
|
time.Sleep(10 * time.Millisecond)
|
|
if !tester.fetcher.queue.Empty() {
|
|
t.Fatalf("fetcher queued stale block")
|
|
}
|
|
// Ensure that a block with a higher number than the threshold is discarded
|
|
tester.fetcher.Enqueue("higher", blocks[hashes[high]])
|
|
time.Sleep(10 * time.Millisecond)
|
|
if !tester.fetcher.queue.Empty() {
|
|
t.Fatalf("fetcher queued future block")
|
|
}
|
|
}
|
|
|
|
// Tests that announcements with numbers much lower or higher than out current
|
|
// head get discarded to prevent wasting resources on useless blocks from faulty
|
|
// peers.
|
|
func TestDistantAnnouncementDiscarding62(t *testing.T) { testDistantAnnouncementDiscarding(t, 62) }
|
|
func TestDistantAnnouncementDiscarding63(t *testing.T) { testDistantAnnouncementDiscarding(t, 63) }
|
|
func TestDistantAnnouncementDiscarding64(t *testing.T) { testDistantAnnouncementDiscarding(t, 64) }
|
|
|
|
func testDistantAnnouncementDiscarding(t *testing.T, protocol int) {
|
|
// Create a long chain to import and define the discard boundaries
|
|
hashes, blocks := makeChain(3*maxQueueDist, 0, genesis)
|
|
head := hashes[len(hashes)/2]
|
|
|
|
low, high := len(hashes)/2+maxUncleDist+1, len(hashes)/2-maxQueueDist-1
|
|
|
|
// Create a tester and simulate a head block being the middle of the above chain
|
|
tester := newTester()
|
|
|
|
tester.lock.Lock()
|
|
tester.hashes = []common.Hash{head}
|
|
tester.blocks = map[common.Hash]*types.Block{head: blocks[head]}
|
|
tester.lock.Unlock()
|
|
|
|
headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
|
|
bodyFetcher := tester.makeBodyFetcher(blocks, 0)
|
|
|
|
fetching := make(chan struct{}, 2)
|
|
tester.fetcher.fetchingHook = func(hashes []common.Hash) { fetching <- struct{}{} }
|
|
|
|
// Ensure that a block with a lower number than the threshold is discarded
|
|
tester.fetcher.Notify("lower", hashes[low], blocks[hashes[low]].NumberU64(), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
|
|
select {
|
|
case <-time.After(50 * time.Millisecond):
|
|
case <-fetching:
|
|
t.Fatalf("fetcher requested stale header")
|
|
}
|
|
// Ensure that a block with a higher number than the threshold is discarded
|
|
tester.fetcher.Notify("higher", hashes[high], blocks[hashes[high]].NumberU64(), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
|
|
select {
|
|
case <-time.After(50 * time.Millisecond):
|
|
case <-fetching:
|
|
t.Fatalf("fetcher requested future header")
|
|
}
|
|
}
|
|
|
|
// Tests that peers announcing blocks with invalid numbers (i.e. not matching
|
|
// the headers provided afterwards) get dropped as malicious.
|
|
func TestInvalidNumberAnnouncement62(t *testing.T) { testInvalidNumberAnnouncement(t, 62) }
|
|
func TestInvalidNumberAnnouncement63(t *testing.T) { testInvalidNumberAnnouncement(t, 63) }
|
|
func TestInvalidNumberAnnouncement64(t *testing.T) { testInvalidNumberAnnouncement(t, 64) }
|
|
|
|
func testInvalidNumberAnnouncement(t *testing.T, protocol int) {
|
|
// Create a single block to import and check numbers against
|
|
hashes, blocks := makeChain(1, 0, genesis)
|
|
|
|
tester := newTester()
|
|
headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
|
|
bodyFetcher := tester.makeBodyFetcher(blocks, 0)
|
|
|
|
imported := make(chan *types.Block)
|
|
tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
|
|
|
|
// Announce a block with a bad number, check for immediate drop
|
|
tester.fetcher.Notify("bad", hashes[0], 2, time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
|
|
verifyImportEvent(t, imported, false)
|
|
|
|
tester.lock.RLock()
|
|
dropped := tester.drops["bad"]
|
|
tester.lock.RUnlock()
|
|
|
|
if !dropped {
|
|
t.Fatalf("peer with invalid numbered announcement not dropped")
|
|
}
|
|
// Make sure a good announcement passes without a drop
|
|
tester.fetcher.Notify("good", hashes[0], 1, time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
|
|
verifyImportEvent(t, imported, true)
|
|
|
|
tester.lock.RLock()
|
|
dropped = tester.drops["good"]
|
|
tester.lock.RUnlock()
|
|
|
|
if dropped {
|
|
t.Fatalf("peer with valid numbered announcement dropped")
|
|
}
|
|
verifyImportDone(t, imported)
|
|
}
|
|
|
|
// Tests that if a block is empty (i.e. header only), no body request should be
|
|
// made, and instead the header should be assembled into a whole block in itself.
|
|
func TestEmptyBlockShortCircuit62(t *testing.T) { testEmptyBlockShortCircuit(t, 62) }
|
|
func TestEmptyBlockShortCircuit63(t *testing.T) { testEmptyBlockShortCircuit(t, 63) }
|
|
func TestEmptyBlockShortCircuit64(t *testing.T) { testEmptyBlockShortCircuit(t, 64) }
|
|
|
|
func testEmptyBlockShortCircuit(t *testing.T, protocol int) {
|
|
// Create a chain of blocks to import
|
|
hashes, blocks := makeChain(32, 0, genesis)
|
|
|
|
tester := newTester()
|
|
headerFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
|
|
bodyFetcher := tester.makeBodyFetcher(blocks, 0)
|
|
|
|
// Add a monitoring hook for all internal events
|
|
fetching := make(chan []common.Hash)
|
|
tester.fetcher.fetchingHook = func(hashes []common.Hash) { fetching <- hashes }
|
|
|
|
completing := make(chan []common.Hash)
|
|
tester.fetcher.completingHook = func(hashes []common.Hash) { completing <- hashes }
|
|
|
|
imported := make(chan *types.Block)
|
|
tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
|
|
|
|
// Iteratively announce blocks until all are imported
|
|
for i := len(hashes) - 2; i >= 0; i-- {
|
|
tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
|
|
|
|
// All announces should fetch the header
|
|
verifyFetchingEvent(t, fetching, true)
|
|
|
|
// Only blocks with data contents should request bodies
|
|
verifyCompletingEvent(t, completing, len(blocks[hashes[i]].Transactions()) > 0 || len(blocks[hashes[i]].Uncles()) > 0)
|
|
|
|
// Irrelevant of the construct, import should succeed
|
|
verifyImportEvent(t, imported, true)
|
|
}
|
|
verifyImportDone(t, imported)
|
|
}
|
|
|
|
// Tests that a peer is unable to use unbounded memory with sending infinite
|
|
// block announcements to a node, but that even in the face of such an attack,
|
|
// the fetcher remains operational.
|
|
func TestHashMemoryExhaustionAttack62(t *testing.T) { testHashMemoryExhaustionAttack(t, 62) }
|
|
func TestHashMemoryExhaustionAttack63(t *testing.T) { testHashMemoryExhaustionAttack(t, 63) }
|
|
func TestHashMemoryExhaustionAttack64(t *testing.T) { testHashMemoryExhaustionAttack(t, 64) }
|
|
|
|
func testHashMemoryExhaustionAttack(t *testing.T, protocol int) {
|
|
// Create a tester with instrumented import hooks
|
|
tester := newTester()
|
|
|
|
imported, announces := make(chan *types.Block), int32(0)
|
|
tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
|
|
tester.fetcher.announceChangeHook = func(hash common.Hash, added bool) {
|
|
if added {
|
|
atomic.AddInt32(&announces, 1)
|
|
} else {
|
|
atomic.AddInt32(&announces, -1)
|
|
}
|
|
}
|
|
// Create a valid chain and an infinite junk chain
|
|
targetBlocks := hashLimit + 2*maxQueueDist
|
|
hashes, blocks := makeChain(targetBlocks, 0, genesis)
|
|
validHeaderFetcher := tester.makeHeaderFetcher(blocks, -gatherSlack)
|
|
validBodyFetcher := tester.makeBodyFetcher(blocks, 0)
|
|
|
|
attack, _ := makeChain(targetBlocks, 0, unknownBlock)
|
|
attackerHeaderFetcher := tester.makeHeaderFetcher(nil, -gatherSlack)
|
|
attackerBodyFetcher := tester.makeBodyFetcher(nil, 0)
|
|
|
|
// Feed the tester a huge hashset from the attacker, and a limited from the valid peer
|
|
for i := 0; i < len(attack); i++ {
|
|
if i < maxQueueDist {
|
|
tester.fetcher.Notify("valid", hashes[len(hashes)-2-i], uint64(i+1), time.Now(), validHeaderFetcher, validBodyFetcher)
|
|
}
|
|
tester.fetcher.Notify("attacker", attack[i], 1 /* don't distance drop */, time.Now(), attackerHeaderFetcher, attackerBodyFetcher)
|
|
}
|
|
if count := atomic.LoadInt32(&announces); count != hashLimit+maxQueueDist {
|
|
t.Fatalf("queued announce count mismatch: have %d, want %d", count, hashLimit+maxQueueDist)
|
|
}
|
|
// Wait for fetches to complete
|
|
verifyImportCount(t, imported, maxQueueDist)
|
|
|
|
// Feed the remaining valid hashes to ensure DOS protection state remains clean
|
|
for i := len(hashes) - maxQueueDist - 2; i >= 0; i-- {
|
|
tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), validHeaderFetcher, validBodyFetcher)
|
|
verifyImportEvent(t, imported, true)
|
|
}
|
|
verifyImportDone(t, imported)
|
|
}
|
|
|
|
// Tests that blocks sent to the fetcher (either through propagation or via hash
|
|
// announces and retrievals) don't pile up indefinitely, exhausting available
|
|
// system memory.
|
|
func TestBlockMemoryExhaustionAttack(t *testing.T) {
|
|
// Create a tester with instrumented import hooks
|
|
tester := newTester()
|
|
|
|
imported, enqueued := make(chan *types.Block), int32(0)
|
|
tester.fetcher.importedHook = func(block *types.Block) { imported <- block }
|
|
tester.fetcher.queueChangeHook = func(hash common.Hash, added bool) {
|
|
if added {
|
|
atomic.AddInt32(&enqueued, 1)
|
|
} else {
|
|
atomic.AddInt32(&enqueued, -1)
|
|
}
|
|
}
|
|
// Create a valid chain and a batch of dangling (but in range) blocks
|
|
targetBlocks := hashLimit + 2*maxQueueDist
|
|
hashes, blocks := makeChain(targetBlocks, 0, genesis)
|
|
attack := make(map[common.Hash]*types.Block)
|
|
for i := byte(0); len(attack) < blockLimit+2*maxQueueDist; i++ {
|
|
hashes, blocks := makeChain(maxQueueDist-1, i, unknownBlock)
|
|
for _, hash := range hashes[:maxQueueDist-2] {
|
|
attack[hash] = blocks[hash]
|
|
}
|
|
}
|
|
// Try to feed all the attacker blocks make sure only a limited batch is accepted
|
|
for _, block := range attack {
|
|
tester.fetcher.Enqueue("attacker", block)
|
|
}
|
|
time.Sleep(200 * time.Millisecond)
|
|
if queued := atomic.LoadInt32(&enqueued); queued != blockLimit {
|
|
t.Fatalf("queued block count mismatch: have %d, want %d", queued, blockLimit)
|
|
}
|
|
// Queue up a batch of valid blocks, and check that a new peer is allowed to do so
|
|
for i := 0; i < maxQueueDist-1; i++ {
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[len(hashes)-3-i]])
|
|
}
|
|
time.Sleep(100 * time.Millisecond)
|
|
if queued := atomic.LoadInt32(&enqueued); queued != blockLimit+maxQueueDist-1 {
|
|
t.Fatalf("queued block count mismatch: have %d, want %d", queued, blockLimit+maxQueueDist-1)
|
|
}
|
|
// Insert the missing piece (and sanity check the import)
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[len(hashes)-2]])
|
|
verifyImportCount(t, imported, maxQueueDist)
|
|
|
|
// Insert the remaining blocks in chunks to ensure clean DOS protection
|
|
for i := maxQueueDist; i < len(hashes)-1; i++ {
|
|
tester.fetcher.Enqueue("valid", blocks[hashes[len(hashes)-2-i]])
|
|
verifyImportEvent(t, imported, true)
|
|
}
|
|
verifyImportDone(t, imported)
|
|
}
|