path: root/swarm/network/stream/common_test.go

// 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"
    crand "crypto/rand"
    "errors"
    "flag"
    "fmt"
    "io"
    "io/ioutil"
    "math/rand"
    "os"
    "strings"
    "sync/atomic"
    "testing"
    "time"

    "github.com/ethereum/go-ethereum/log"
    "github.com/ethereum/go-ethereum/p2p/discover"
    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/pot"
    "github.com/ethereum/go-ethereum/swarm/state"
    "github.com/ethereum/go-ethereum/swarm/storage"
    mockdb "github.com/ethereum/go-ethereum/swarm/storage/mock/db"
    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       = pot.DefaultPof(256)
)

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))))
}

func createGlobalStore() (string, *mockdb.GlobalStore, error) {
    var globalStore *mockdb.GlobalStore
    globalStoreDir, err := ioutil.TempDir("", "global.store")
    if err != nil {
        log.Error("Error initiating global store temp directory!", "err", err)
        return "", nil, err
    }
    globalStore, err = mockdb.NewGlobalStore(globalStoreDir)
    if err != nil {
        log.Error("Error initiating global store!", "err", err)
        return "", nil, err
    }
    return globalStoreDir, globalStore, nil
}

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
    }

    netStore, err := storage.NewNetStore(localStore, nil)
    if err != nil {
        return nil, nil, nil, removeDataDir, err
    }

    delivery := NewDelivery(to, netStore)
    netStore.NewNetFetcherFunc = network.NewFetcherFactory(delivery.RequestFromPeers, true).New
    streamer := NewRegistry(addr, delivery, netStore, state.NewInmemoryStore(), nil)
    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) 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 := make([]byte, fileSize*1024)
    _, err := crand.Read(b)
    if err != nil {
        log.Error("Error generating random file.", "err", err)
        return "", err
    }
    return string(b), nil
}

//create a local store for the given node
func createTestLocalStorageForID(id discover.NodeID, 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
}