48b70ecff1
* Rejects peers that respond with a different hash for any of the passed in block numbers. * Meant for emergency situations when the network forks unexpectedly.
202 lines
6.9 KiB
Go
202 lines
6.9 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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// This file contains some shares testing functionality, common to multiple
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// different files and modules being tested.
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package eth
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import (
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"crypto/ecdsa"
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"crypto/rand"
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"math/big"
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"sort"
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"sync"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/params"
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)
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var (
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testBankKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
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testBank = crypto.PubkeyToAddress(testBankKey.PublicKey)
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)
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// newTestProtocolManager creates a new protocol manager for testing purposes,
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// with the given number of blocks already known, and potential notification
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// channels for different events.
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func newTestProtocolManager(mode downloader.SyncMode, blocks int, generator func(int, *core.BlockGen), newtx chan<- []*types.Transaction) (*ProtocolManager, *ethdb.MemDatabase, error) {
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var (
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evmux = new(event.TypeMux)
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engine = ethash.NewFaker()
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db = ethdb.NewMemDatabase()
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gspec = &core.Genesis{
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Config: params.TestChainConfig,
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Alloc: core.GenesisAlloc{testBank: {Balance: big.NewInt(1000000)}},
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}
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genesis = gspec.MustCommit(db)
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blockchain, _ = core.NewBlockChain(db, nil, gspec.Config, engine, vm.Config{}, nil)
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)
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chain, _ := core.GenerateChain(gspec.Config, genesis, ethash.NewFaker(), db, blocks, generator)
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if _, err := blockchain.InsertChain(chain); err != nil {
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panic(err)
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}
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pm, err := NewProtocolManager(gspec.Config, mode, DefaultConfig.NetworkId, evmux, &testTxPool{added: newtx}, engine, blockchain, db, nil)
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if err != nil {
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return nil, nil, err
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}
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pm.Start(1000)
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return pm, db, nil
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}
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// newTestProtocolManagerMust creates a new protocol manager for testing purposes,
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// with the given number of blocks already known, and potential notification
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// channels for different events. In case of an error, the constructor force-
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// fails the test.
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func newTestProtocolManagerMust(t *testing.T, mode downloader.SyncMode, blocks int, generator func(int, *core.BlockGen), newtx chan<- []*types.Transaction) (*ProtocolManager, *ethdb.MemDatabase) {
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pm, db, err := newTestProtocolManager(mode, blocks, generator, newtx)
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if err != nil {
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t.Fatalf("Failed to create protocol manager: %v", err)
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}
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return pm, db
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}
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// testTxPool is a fake, helper transaction pool for testing purposes
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type testTxPool struct {
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txFeed event.Feed
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pool []*types.Transaction // Collection of all transactions
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added chan<- []*types.Transaction // Notification channel for new transactions
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lock sync.RWMutex // Protects the transaction pool
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}
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// AddRemotes appends a batch of transactions to the pool, and notifies any
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// listeners if the addition channel is non nil
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func (p *testTxPool) AddRemotes(txs []*types.Transaction) []error {
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p.lock.Lock()
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defer p.lock.Unlock()
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p.pool = append(p.pool, txs...)
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if p.added != nil {
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p.added <- txs
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}
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return make([]error, len(txs))
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}
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// Pending returns all the transactions known to the pool
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func (p *testTxPool) Pending() (map[common.Address]types.Transactions, error) {
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p.lock.RLock()
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defer p.lock.RUnlock()
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batches := make(map[common.Address]types.Transactions)
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for _, tx := range p.pool {
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from, _ := types.Sender(types.HomesteadSigner{}, tx)
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batches[from] = append(batches[from], tx)
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}
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for _, batch := range batches {
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sort.Sort(types.TxByNonce(batch))
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}
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return batches, nil
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}
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func (p *testTxPool) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
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return p.txFeed.Subscribe(ch)
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}
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// newTestTransaction create a new dummy transaction.
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func newTestTransaction(from *ecdsa.PrivateKey, nonce uint64, datasize int) *types.Transaction {
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tx := types.NewTransaction(nonce, common.Address{}, big.NewInt(0), 100000, big.NewInt(0), make([]byte, datasize))
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tx, _ = types.SignTx(tx, types.HomesteadSigner{}, from)
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return tx
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}
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// testPeer is a simulated peer to allow testing direct network calls.
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type testPeer struct {
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net p2p.MsgReadWriter // Network layer reader/writer to simulate remote messaging
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app *p2p.MsgPipeRW // Application layer reader/writer to simulate the local side
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*peer
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}
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// newTestPeer creates a new peer registered at the given protocol manager.
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func newTestPeer(name string, version int, pm *ProtocolManager, shake bool) (*testPeer, <-chan error) {
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// Create a message pipe to communicate through
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app, net := p2p.MsgPipe()
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// Generate a random id and create the peer
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var id enode.ID
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rand.Read(id[:])
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peer := pm.newPeer(version, p2p.NewPeer(id, name, nil), net)
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// Start the peer on a new thread
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errc := make(chan error, 1)
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go func() {
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select {
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case pm.newPeerCh <- peer:
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errc <- pm.handle(peer)
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case <-pm.quitSync:
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errc <- p2p.DiscQuitting
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}
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}()
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tp := &testPeer{app: app, net: net, peer: peer}
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// Execute any implicitly requested handshakes and return
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if shake {
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var (
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genesis = pm.blockchain.Genesis()
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head = pm.blockchain.CurrentHeader()
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td = pm.blockchain.GetTd(head.Hash(), head.Number.Uint64())
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)
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tp.handshake(nil, td, head.Hash(), genesis.Hash())
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}
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return tp, errc
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}
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// handshake simulates a trivial handshake that expects the same state from the
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// remote side as we are simulating locally.
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func (p *testPeer) handshake(t *testing.T, td *big.Int, head common.Hash, genesis common.Hash) {
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msg := &statusData{
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ProtocolVersion: uint32(p.version),
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NetworkId: DefaultConfig.NetworkId,
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TD: td,
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CurrentBlock: head,
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GenesisBlock: genesis,
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}
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if err := p2p.ExpectMsg(p.app, StatusMsg, msg); err != nil {
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t.Fatalf("status recv: %v", err)
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}
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if err := p2p.Send(p.app, StatusMsg, msg); err != nil {
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t.Fatalf("status send: %v", err)
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}
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}
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// close terminates the local side of the peer, notifying the remote protocol
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// manager of termination.
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func (p *testPeer) close() {
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p.app.Close()
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}
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