// 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"
"encoding/binary"
"errors"
"flag"
"fmt"
"io"
"io/ioutil"
"os"
"sync/atomic"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mock"
"github.com/ethereum/go-ethereum/swarm/storage/mock/db"
colorable "github.com/mattn/go-colorable"
)
var (
deliveries map[discover.NodeID]*Delivery
stores map[discover.NodeID]storage.ChunkStore
toAddr func(discover.NodeID) *network.BzzAddr
peerCount func(discover.NodeID) int
adapter = flag.String("adapter", "sim", "type of simulation: sim|exec|docker")
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)")
)
var (
defaultSkipCheck bool
waitPeerErrC chan error
chunkSize = 4096
registries map[discover.NodeID]*TestRegistry
createStoreFunc func(id discover.NodeID, addr *network.BzzAddr) (storage.ChunkStore, error)
getRetrieveFunc = defaultRetrieveFunc
subscriptionCount = 0
globalStore mock.GlobalStorer
globalStoreDir string
)
var services = adapters.Services{
"streamer": NewStreamerService,
"intervalsStreamer": newIntervalsStreamerService,
}
func init() {
flag.Parse()
// register the Delivery service which will run as a devp2p
// protocol when using the exec adapter
adapters.RegisterServices(services)
log.PrintOrigins(true)
log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(*loglevel), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true))))
}
func createGlobalStore() {
var err error
globalStoreDir, err = ioutil.TempDir("", "global.store")
if err != nil {
log.Error("Error initiating global store temp directory!", "err", err)
return
}
globalStore, err = db.NewGlobalStore(globalStoreDir)
if err != nil {
log.Error("Error initiating global store!", "err", err)
}
}
// NewStreamerService
func NewStreamerService(ctx *adapters.ServiceContext) (node.Service, error) {
var err error
id := ctx.Config.ID
addr := toAddr(id)
kad := network.NewKademlia(addr.Over(), network.NewKadParams())
stores[id], err = createStoreFunc(id, addr)
if err != nil {
return nil, err
}
store := stores[id].(*storage.LocalStore)
db := storage.NewDBAPI(store)
delivery := NewDelivery(kad, db)
deliveries[id] = delivery
r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
SkipCheck: defaultSkipCheck,
DoRetrieve: false,
})
RegisterSwarmSyncerServer(r, db)
RegisterSwarmSyncerClient(r, db)
go func() {
waitPeerErrC <- waitForPeers(r, 1*time.Second, peerCount(id))
}()
fileStore := storage.NewFileStore(storage.NewNetStore(store, getRetrieveFunc(id)), storage.NewFileStoreParams())
testRegistry := &TestRegistry{Registry: r, fileStore: fileStore}
registries[id] = testRegistry
return testRegistry, nil
}
func defaultRetrieveFunc(id discover.NodeID) func(ctx context.Context, chunk *storage.Chunk) error {
return nil
}
func datadirsCleanup() {
for _, id := range ids {
os.RemoveAll(datadirs[id])
}
if globalStoreDir != "" {
os.RemoveAll(globalStoreDir)
}
}
//local stores need to be cleaned up after the sim is done
func localStoreCleanup() {
log.Info("Cleaning up...")
for _, id := range ids {
registries[id].Close()
stores[id].Close()
}
log.Info("Local store cleanup done")
}
func newStreamerTester(t *testing.T) (*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, func() {}, err
}
removeDataDir := func() {
os.RemoveAll(datadir)
}
params := storage.NewDefaultLocalStoreParams()
params.Init(datadir)
params.BaseKey = addr.Over()
localStore, err := storage.NewTestLocalStoreForAddr(params)
if err != nil {
return nil, nil, nil, removeDataDir, err
}
db := storage.NewDBAPI(localStore)
delivery := NewDelivery(to, db)
streamer := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
SkipCheck: defaultSkipCheck,
})
teardown := func() {
streamer.Close()
removeDataDir()
}
protocolTester := p2ptest.NewProtocolTester(t, network.NewNodeIDFromAddr(addr), 1, streamer.runProtocol)
err = waitForPeers(streamer, 1*time.Second, 1)
if err != nil {
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,
}
}
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) {
i := atomic.AddUint32(&rrs.index, 1)
idx := int(i) % len(rrs.stores)
rrs.stores[idx].Put(ctx, chunk)
}
func (rrs *roundRobinStore) Close() {
for _, store := range rrs.stores {
store.Close()
}
}
type TestRegistry struct {
*Registry
fileStore *storage.FileStore
}
func (r *TestRegistry) APIs() []rpc.API {
a := r.Registry.APIs()
a = append(a, rpc.API{
Namespace: "stream",
Version: "3.0",
Service: r,
Public: true,
})
return a
}
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 (r *TestRegistry) ReadAll(hash common.Hash) (int64, error) {
return readAll(r.fileStore, hash[:])
}
func (r *TestRegistry) Start(server *p2p.Server) error {
return r.Registry.Start(server)
}
func (r *TestRegistry) Stop() error {
return r.Registry.Stop()
}
type TestExternalRegistry struct {
*Registry
}
func (r *TestExternalRegistry) APIs() []rpc.API {
a := r.Registry.APIs()
a = append(a, rpc.API{
Namespace: "stream",
Version: "3.0",
Service: r,
Public: true,
})
return a
}
func (r *TestExternalRegistry) GetHashes(ctx context.Context, peerId discover.NodeID, s Stream) (*rpc.Subscription, error) {
peer := r.getPeer(peerId)
client, err := peer.getClient(ctx, s)
if err != nil {
return nil, err
}
c := client.Client.(*testExternalClient)
notifier, supported := rpc.NotifierFromContext(ctx)
if !supported {
return nil, fmt.Errorf("Subscribe not supported")
}
sub := notifier.CreateSubscription()
go func() {
// if we begin sending event immediately some events
// will probably be dropped since the subscription ID might not be send to
// the client.
// ref: rpc/subscription_test.go#L65
time.Sleep(1 * time.Second)
for {
select {
case h := <-c.hashes:
<-c.enableNotificationsC // wait for notification subscription to complete
if err := notifier.Notify(sub.ID, h); err != nil {
log.Warn(fmt.Sprintf("rpc sub notifier notify stream %s: %v", s, err))
}
case err := <-sub.Err():
if err != nil {
log.Warn(fmt.Sprintf("caught subscription error in stream %s: %v", s, err))
}
case <-notifier.Closed():
log.Trace(fmt.Sprintf("rpc sub notifier closed"))
return
}
}
}()
return sub, nil
}
func (r *TestExternalRegistry) EnableNotifications(peerId discover.NodeID, s Stream) error {
peer := r.getPeer(peerId)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
client, err := peer.getClient(ctx, s)
if err != nil {
return err
}
close(client.Client.(*testExternalClient).enableNotificationsC)
return nil
}
// TODO: merge functionalities of testExternalClient and testExternalServer
// with testClient and testServer.
type testExternalClient struct {
hashes chan []byte
db *storage.DBAPI
enableNotificationsC chan struct{}
}
func newTestExternalClient(db *storage.DBAPI) *testExternalClient {
return &testExternalClient{
hashes: make(chan []byte),
db: db,
enableNotificationsC: make(chan struct{}),
}
}
func (c *testExternalClient) NeedData(ctx context.Context, hash []byte) func() {
chunk, _ := c.db.GetOrCreateRequest(ctx, hash)
if chunk.ReqC == nil {
return nil
}
c.hashes <- hash
return func() {
chunk.WaitToStore()
}
}
func (c *testExternalClient) BatchDone(Stream, uint64, []byte, []byte) func() (*TakeoverProof, error) {
return nil
}
func (c *testExternalClient) Close() {}
const testExternalServerBatchSize = 10
type testExternalServer struct {
t string
keyFunc func(key []byte, index uint64)
sessionAt uint64
maxKeys uint64
streamer *TestExternalRegistry
}
func newTestExternalServer(t string, sessionAt, maxKeys uint64, keyFunc func(key []byte, index uint64)) *testExternalServer {
if keyFunc == nil {
keyFunc = binary.BigEndian.PutUint64
}
return &testExternalServer{
t: t,
keyFunc: keyFunc,
sessionAt: sessionAt,
maxKeys: maxKeys,
}
}
func (s *testExternalServer) SetNextBatch(from uint64, to uint64) ([]byte, uint64, uint64, *HandoverProof, error) {
if from == 0 && to == 0 {
from = s.sessionAt
to = s.sessionAt + testExternalServerBatchSize
}
if to-from > testExternalServerBatchSize {
to = from + testExternalServerBatchSize - 1
}
if from >= s.maxKeys && to > s.maxKeys {
return nil, 0, 0, nil, io.EOF
}
if to > s.maxKeys {
to = s.maxKeys
}
b := make([]byte, HashSize*(to-from+1))
for i := from; i <= to; i++ {
s.keyFunc(b[(i-from)*HashSize:(i-from+1)*HashSize], i)
}
return b, from, to, nil, nil
}
func (s *testExternalServer) GetData(context.Context, []byte) ([]byte, error) {
return make([]byte, 4096), nil
}
func (s *testExternalServer) Close() {}
// Sets the global value defaultSkipCheck.
// It should be used in test function defer to reset the global value
// to the original value.
//
// defer setDefaultSkipCheck(defaultSkipCheck)
// defaultSkipCheck = skipCheck
//
// This works as defer function arguments evaluations are evaluated as ususal,
// but only the function body invocation is deferred.
func setDefaultSkipCheck(skipCheck bool) {
defaultSkipCheck = skipCheck
}
