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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package stream
import (
"context"
"errors"
"flag"
"fmt"
"io"
"io/ioutil"
"math/rand"
"os"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/network/simulation"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/storage"
mockmem "github.com/ethereum/go-ethereum/swarm/storage/mock/mem"
"github.com/ethereum/go-ethereum/swarm/testutil"
colorable "github.com/mattn/go-colorable"
)
var (
loglevel = flag.Int("loglevel", 2, "verbosity of logs")
nodes = flag.Int("nodes", 0, "number of nodes")
chunks = flag.Int("chunks", 0, "number of chunks")
useMockStore = flag.Bool("mockstore", false, "disabled mock store (default: enabled)")
longrunning = flag.Bool("longrunning", false, "do run long-running tests")
bucketKeyDB = simulation.BucketKey("db")
bucketKeyStore = simulation.BucketKey("store")
bucketKeyFileStore = simulation.BucketKey("filestore")
bucketKeyNetStore = simulation.BucketKey("netstore")
bucketKeyDelivery = simulation.BucketKey("delivery")
bucketKeyRegistry = simulation.BucketKey("registry")
chunkSize = 4096
pof = network.Pof
)
func init() {
flag.Parse()
rand.Seed(time.Now().UnixNano())
log.PrintOrigins(true)
log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(*loglevel), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true))))
}
// newNetStoreAndDelivery is a default constructor for BzzAddr, NetStore and Delivery, used in Simulations
func newNetStoreAndDelivery(ctx *adapters.ServiceContext, bucket *sync.Map) (*network.BzzAddr, *storage.NetStore, *Delivery, func(), error) {
addr := network.NewAddr(ctx.Config.Node())
netStore, delivery, cleanup, err := netStoreAndDeliveryWithAddr(ctx, bucket, addr)
if err != nil {
return nil, nil, nil, nil, err
}
netStore.NewNetFetcherFunc = network.NewFetcherFactory(delivery.RequestFromPeers, true).New
return addr, netStore, delivery, cleanup, nil
}
// newNetStoreAndDeliveryWithBzzAddr is a constructor for NetStore and Delivery, used in Simulations, accepting any BzzAddr
func newNetStoreAndDeliveryWithBzzAddr(ctx *adapters.ServiceContext, bucket *sync.Map, addr *network.BzzAddr) (*storage.NetStore, *Delivery, func(), error) {
netStore, delivery, cleanup, err := netStoreAndDeliveryWithAddr(ctx, bucket, addr)
if err != nil {
return nil, nil, nil, err
}
netStore.NewNetFetcherFunc = network.NewFetcherFactory(delivery.RequestFromPeers, true).New
return netStore, delivery, cleanup, nil
}
// newNetStoreAndDeliveryWithRequestFunc is a constructor for NetStore and Delivery, used in Simulations, accepting any NetStore.RequestFunc
func newNetStoreAndDeliveryWithRequestFunc(ctx *adapters.ServiceContext, bucket *sync.Map, rf network.RequestFunc) (*network.BzzAddr, *storage.NetStore, *Delivery, func(), error) {
addr := network.NewAddr(ctx.Config.Node())
netStore, delivery, cleanup, err := netStoreAndDeliveryWithAddr(ctx, bucket, addr)
if err != nil {
return nil, nil, nil, nil, err
}
netStore.NewNetFetcherFunc = network.NewFetcherFactory(rf, true).New
return addr, netStore, delivery, cleanup, nil
}
func netStoreAndDeliveryWithAddr(ctx *adapters.ServiceContext, bucket *sync.Map, addr *network.BzzAddr) (*storage.NetStore, *Delivery, func(), error) {
n := ctx.Config.Node()
store, datadir, err := createTestLocalStorageForID(n.ID(), addr)
if *useMockStore {
store, datadir, err = createMockStore(mockmem.NewGlobalStore(), n.ID(), addr)
}
if err != nil {
return nil, nil, nil, err
}
localStore := store.(*storage.LocalStore)
netStore, err := storage.NewNetStore(localStore, nil)
if err != nil {
return nil, nil, nil, err
}
fileStore := storage.NewFileStore(netStore, storage.NewFileStoreParams())
kad := network.NewKademlia(addr.Over(), network.NewKadParams())
delivery := NewDelivery(kad, netStore)
bucket.Store(bucketKeyStore, store)
bucket.Store(bucketKeyDB, netStore)
bucket.Store(bucketKeyDelivery, delivery)
bucket.Store(bucketKeyFileStore, fileStore)
// for the kademlia object, we use the global key from the simulation package,
// as the simulation will try to access it in the WaitTillHealthy with that key
bucket.Store(simulation.BucketKeyKademlia, kad)
cleanup := func() {
netStore.Close()
os.RemoveAll(datadir)
}
return netStore, delivery, cleanup, nil
}
func newStreamerTester(registryOptions *RegistryOptions) (*p2ptest.ProtocolTester, *Registry, *storage.LocalStore, func(), error) {
// setup
addr := network.RandomAddr() // tested peers peer address
to := network.NewKademlia(addr.OAddr, network.NewKadParams())
// temp datadir
datadir, err := ioutil.TempDir("", "streamer")
if err != nil {
return nil, nil, nil, nil, err
}
removeDataDir := func() {
os.RemoveAll(datadir)
}
params := storage.NewDefaultLocalStoreParams()
params.Init(datadir)
params.BaseKey = addr.Over()
localStore, err := storage.NewTestLocalStoreForAddr(params)
if err != nil {
removeDataDir()
return nil, nil, nil, nil, err
}
netStore, err := storage.NewNetStore(localStore, nil)
if err != nil {
removeDataDir()
return nil, nil, nil, nil, err
}
delivery := NewDelivery(to, netStore)
netStore.NewNetFetcherFunc = network.NewFetcherFactory(delivery.RequestFromPeers, true).New
streamer := NewRegistry(addr.ID(), delivery, netStore, state.NewInmemoryStore(), registryOptions, nil)
teardown := func() {
streamer.Close()
removeDataDir()
}
prvkey, err := crypto.GenerateKey()
if err != nil {
removeDataDir()
return nil, nil, nil, nil, err
}
protocolTester := p2ptest.NewProtocolTester(prvkey, 1, streamer.runProtocol)
err = waitForPeers(streamer, 10*time.Second, 1)
if err != nil {
teardown()
return nil, nil, nil, nil, errors.New("timeout: peer is not created")
}
return protocolTester, streamer, localStore, teardown, nil
}
func waitForPeers(streamer *Registry, timeout time.Duration, expectedPeers int) error {
ticker := time.NewTicker(10 * time.Millisecond)
timeoutTimer := time.NewTimer(timeout)
for {
select {
case <-ticker.C:
if streamer.peersCount() >= expectedPeers {
return nil
}
case <-timeoutTimer.C:
return errors.New("timeout")
}
}
}
type roundRobinStore struct {
index uint32
stores []storage.ChunkStore
}
func newRoundRobinStore(stores ...storage.ChunkStore) *roundRobinStore {
return &roundRobinStore{
stores: stores,
}
}
// not used in this context, only to fulfill ChunkStore interface
func (rrs *roundRobinStore) Has(ctx context.Context, addr storage.Address) bool {
panic("RoundRobinStor doesn't support HasChunk")
}
func (rrs *roundRobinStore) Get(ctx context.Context, addr storage.Address) (storage.Chunk, error) {
return nil, errors.New("get not well defined on round robin store")
}
func (rrs *roundRobinStore) Put(ctx context.Context, chunk storage.Chunk) error {
i := atomic.AddUint32(&rrs.index, 1)
idx := int(i) % len(rrs.stores)
return rrs.stores[idx].Put(ctx, chunk)
}
func (rrs *roundRobinStore) Close() {
for _, store := range rrs.stores {
store.Close()
}
}
func readAll(fileStore *storage.FileStore, hash []byte) (int64, error) {
r, _ := fileStore.Retrieve(context.TODO(), hash)
buf := make([]byte, 1024)
var n int
var total int64
var err error
for (total == 0 || n > 0) && err == nil {
n, err = r.ReadAt(buf, total)
total += int64(n)
}
if err != nil && err != io.EOF {
return total, err
}
return total, nil
}
func uploadFilesToNodes(sim *simulation.Simulation) ([]storage.Address, []string, error) {
nodes := sim.UpNodeIDs()
nodeCnt := len(nodes)
log.Debug(fmt.Sprintf("Uploading %d files to nodes", nodeCnt))
//array holding generated files
rfiles := make([]string, nodeCnt)
//array holding the root hashes of the files
rootAddrs := make([]storage.Address, nodeCnt)
var err error
//for every node, generate a file and upload
for i, id := range nodes {
item, ok := sim.NodeItem(id, bucketKeyFileStore)
if !ok {
return nil, nil, fmt.Errorf("Error accessing localstore")
}
fileStore := item.(*storage.FileStore)
//generate a file
rfiles[i], err = generateRandomFile()
if err != nil {
return nil, nil, err
}
//store it (upload it) on the FileStore
ctx := context.TODO()
rk, wait, err := fileStore.Store(ctx, strings.NewReader(rfiles[i]), int64(len(rfiles[i])), false)
log.Debug("Uploaded random string file to node")
if err != nil {
return nil, nil, err
}
err = wait(ctx)
if err != nil {
return nil, nil, err
}
rootAddrs[i] = rk
}
return rootAddrs, rfiles, nil
}
//generate a random file (string)
func generateRandomFile() (string, error) {
//generate a random file size between minFileSize and maxFileSize
fileSize := rand.Intn(maxFileSize-minFileSize) + minFileSize
log.Debug(fmt.Sprintf("Generated file with filesize %d kB", fileSize))
b := testutil.RandomBytes(1, fileSize*1024)
return string(b), nil
}
//create a local store for the given node
func createTestLocalStorageForID(id enode.ID, addr *network.BzzAddr) (storage.ChunkStore, string, error) {
var datadir string
var err error
datadir, err = ioutil.TempDir("", fmt.Sprintf("syncer-test-%s", id.TerminalString()))
if err != nil {
return nil, "", err
}
var store storage.ChunkStore
params := storage.NewDefaultLocalStoreParams()
params.ChunkDbPath = datadir
params.BaseKey = addr.Over()
store, err = storage.NewTestLocalStoreForAddr(params)
if err != nil {
os.RemoveAll(datadir)
return nil, "", err
}
return store, datadir, nil
}
// watchDisconnections receives simulation peer events in a new goroutine and sets atomic value
// disconnected to true in case of a disconnect event.
func watchDisconnections(ctx context.Context, sim *simulation.Simulation) (disconnected *boolean) {
log.Debug("Watching for disconnections")
disconnections := sim.PeerEvents(
ctx,
sim.NodeIDs(),
simulation.NewPeerEventsFilter().Drop(),
)
disconnected = new(boolean)
go func() {
for {
select {
case <-ctx.Done():
return
case d := <-disconnections:
if d.Error != nil {
log.Error("peer drop event error", "node", d.NodeID, "peer", d.PeerID, "err", d.Error)
} else {
log.Error("peer drop", "node", d.NodeID, "peer", d.PeerID)
}
disconnected.set(true)
}
}
}()
return disconnected
}
// boolean is used to concurrently set
// and read a boolean value.
type boolean struct {
v bool
mu sync.RWMutex
}
// set sets the value.
func (b *boolean) set(v bool) {
b.mu.Lock()
defer b.mu.Unlock()
b.v = v
}
// bool reads the value.
func (b *boolean) bool() bool {
b.mu.RLock()
defer b.mu.RUnlock()
return b.v
}
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