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les: implement ultralight client (#16904)

Browse Source 
For more information about this light client mode, read
https://hackmd.io/s/HJy7jjZpm
This commit is contained in:
b00ris 2019-01-24 14:18:26 +03:00 committed by Felix Lange
parent b8f9b3779f
commit 769657060e
23 changed files with 1288 additions and 179 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
cmd/geth/config.go
View File

@ -125,6 +125,7 @@ func makeConfigNode(ctx *cli.Context) (*node.Node, gethConfig) {
}
// Apply flags.
utils.SetULC(ctx, &cfg.Eth)
utils.SetNodeConfig(ctx, &cfg.Node)
stack, err := node.New(&cfg.Node)
if err != nil {

4
cmd/geth/main.go
View File

@ -82,6 +82,10 @@ var (
utils.TxPoolAccountQueueFlag,
utils.TxPoolGlobalQueueFlag,
utils.TxPoolLifetimeFlag,
utils.ULCModeConfigFlag,
utils.OnlyAnnounceModeFlag,
utils.ULCTrustedNodesFlag,
utils.ULCMinTrustedFractionFlag,
utils.SyncModeFlag,
utils.GCModeFlag,
utils.LightServFlag,

55
cmd/utils/flags.go
View File

@ -19,6 +19,7 @@ package utils
import (
"crypto/ecdsa"
"encoding/json"
"fmt"
"io/ioutil"
"math/big"
@ -161,6 +162,23 @@ var (
Usage: "Document Root for HTTPClient file scheme",
Value: DirectoryString{homeDir()},
}
ULCModeConfigFlag = cli.StringFlag{
Name: "ulc.config",
Usage: "Config file to use for ultra light client mode",
}
OnlyAnnounceModeFlag = cli.BoolFlag{
Name: "ulc.onlyannounce",
Usage: "ULC server sends announcements only",
}
ULCMinTrustedFractionFlag = cli.IntFlag{
Name: "ulc.fraction",
Usage: "Minimum % of trusted ULC servers required to announce a new head",
}
ULCTrustedNodesFlag = cli.StringFlag{
Name: "ulc.trusted",
Usage: "List of trusted ULC servers",
}
defaultSyncMode = eth.DefaultConfig.SyncMode
SyncModeFlag = TextMarshalerFlag{
Name: "syncmode",
@ -871,6 +889,40 @@ func setIPC(ctx *cli.Context, cfg *node.Config) {
}
}
// SetULC setup ULC config from file if given.
func SetULC(ctx *cli.Context, cfg *eth.Config) {
// ULC config isn't loaded from global config and ULC config and ULC trusted nodes are not defined.
if cfg.ULC == nil && !(ctx.GlobalIsSet(ULCModeConfigFlag.Name) || ctx.GlobalIsSet(ULCTrustedNodesFlag.Name)) {
return
}
cfg.ULC = &eth.ULCConfig{}
path := ctx.GlobalString(ULCModeConfigFlag.Name)
if path != "" {
cfgData, err := ioutil.ReadFile(path)
if err != nil {
Fatalf("Failed to unmarshal ULC configuration: %v", err)
}
err = json.Unmarshal(cfgData, &cfg.ULC)
if err != nil {
Fatalf("Failed to unmarshal ULC configuration: %s", err.Error())
}
}
if trustedNodes := ctx.GlobalString(ULCTrustedNodesFlag.Name); trustedNodes != "" {
cfg.ULC.TrustedServers = strings.Split(trustedNodes, ",")
}
if trustedFraction := ctx.GlobalInt(ULCMinTrustedFractionFlag.Name); trustedFraction > 0 {
cfg.ULC.MinTrustedFraction = trustedFraction
}
if cfg.ULC.MinTrustedFraction <= 0 && cfg.ULC.MinTrustedFraction > 100 {
log.Error("MinTrustedFraction is invalid", "MinTrustedFraction", cfg.ULC.MinTrustedFraction, "Changed to default", eth.DefaultULCMinTrustedFraction)
cfg.ULC.MinTrustedFraction = eth.DefaultULCMinTrustedFraction
}
}
// makeDatabaseHandles raises out the number of allowed file handles per process
// for Geth and returns half of the allowance to assign to the database.
func makeDatabaseHandles() int {
@ -1222,6 +1274,9 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
if ctx.GlobalIsSet(LightPeersFlag.Name) {
cfg.LightPeers = ctx.GlobalInt(LightPeersFlag.Name)
}
if ctx.GlobalIsSet(OnlyAnnounceModeFlag.Name) {
cfg.OnlyAnnounce = ctx.GlobalBool(OnlyAnnounceModeFlag.Name)
}
if ctx.GlobalIsSet(NetworkIdFlag.Name) {
cfg.NetworkId = ctx.GlobalUint64(NetworkIdFlag.Name)
}

16
core/headerchain.go
View File

@ -219,14 +219,18 @@ func (hc *HeaderChain) ValidateHeaderChain(chain []*types.Header, checkFreq int)
// Generate the list of seal verification requests, and start the parallel verifier
seals := make([]bool, len(chain))
for i := 0; i < len(seals)/checkFreq; i++ {
index := i*checkFreq + hc.rand.Intn(checkFreq)
if index >= len(seals) {
index = len(seals) - 1
if checkFreq != 0 {
// In case of checkFreq == 0 all seals are left false.
for i := 0; i < len(seals)/checkFreq; i++ {
index := i*checkFreq + hc.rand.Intn(checkFreq)
if index >= len(seals) {
index = len(seals) - 1
}
seals[index] = true
}
seals[index] = true
// Last should always be verified to avoid junk.
seals[len(seals)-1] = true
}
seals[len(seals)-1] = true // Last should always be verified to avoid junk
abort, results := hc.engine.VerifyHeaders(hc, chain, seals)
defer close(abort)

8
eth/config.go
View File

@ -91,8 +91,12 @@ type Config struct {
Whitelist map[uint64]common.Hash `toml:"-"`
// Light client options
LightServ int `toml:",omitempty"` // Maximum percentage of time allowed for serving LES requests
LightPeers int `toml:",omitempty"` // Maximum number of LES client peers
LightServ int `toml:",omitempty"` // Maximum percentage of time allowed for serving LES requests
LightPeers int `toml:",omitempty"` // Maximum number of LES client peers
OnlyAnnounce bool // Maximum number of LES client peers
// Ultra Light client options
ULC *ULCConfig `toml:",omitempty"`
// Database options
SkipBcVersionCheck bool `toml:"-"`

29
eth/gen_config.go
View File

@ -23,10 +23,12 @@ func (c Config) MarshalTOML() (interface{}, error) {
NetworkId uint64
SyncMode downloader.SyncMode
NoPruning bool
LightServ int `toml:",omitempty"`
LightPeers int `toml:",omitempty"`
SkipBcVersionCheck bool `toml:"-"`
DatabaseHandles int `toml:"-"`
LightServ int `toml:",omitempty"`
LightPeers int `toml:",omitempty"`
OnlyAnnounce bool
ULC *ULCConfig `toml:",omitempty"`
SkipBcVersionCheck bool `toml:"-"`
DatabaseHandles int `toml:"-"`
DatabaseCache int
TrieCleanCache int
TrieDirtyCache int
@ -54,6 +56,8 @@ func (c Config) MarshalTOML() (interface{}, error) {
enc.NoPruning = c.NoPruning
enc.LightServ = c.LightServ
enc.LightPeers = c.LightPeers
enc.OnlyAnnounce = c.OnlyAnnounce
enc.ULC = c.ULC
enc.SkipBcVersionCheck = c.SkipBcVersionCheck
enc.DatabaseHandles = c.DatabaseHandles
enc.DatabaseCache = c.DatabaseCache
@ -71,6 +75,7 @@ func (c Config) MarshalTOML() (interface{}, error) {
enc.Ethash = c.Ethash
enc.TxPool = c.TxPool
enc.GPO = c.GPO
enc.EnablePreimageRecording = c.EnablePreimageRecording
enc.DocRoot = c.DocRoot
enc.EWASMInterpreter = c.EWASMInterpreter
@ -85,10 +90,12 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
NetworkId *uint64
SyncMode *downloader.SyncMode
NoPruning *bool
LightServ *int `toml:",omitempty"`
LightPeers *int `toml:",omitempty"`
SkipBcVersionCheck *bool `toml:"-"`
DatabaseHandles *int `toml:"-"`
LightServ *int `toml:",omitempty"`
LightPeers *int `toml:",omitempty"`
OnlyAnnounce *bool
ULC *ULCConfig `toml:",omitempty"`
SkipBcVersionCheck *bool `toml:"-"`
DatabaseHandles *int `toml:"-"`
DatabaseCache *int
TrieCleanCache *int
TrieDirtyCache *int
@ -131,6 +138,12 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
if dec.LightPeers != nil {
c.LightPeers = *dec.LightPeers
}
if dec.OnlyAnnounce != nil {
c.OnlyAnnounce = *dec.OnlyAnnounce
}
if dec.ULC != nil {
c.ULC = dec.ULC
}
if dec.SkipBcVersionCheck != nil {
c.SkipBcVersionCheck = *dec.SkipBcVersionCheck
}

9
eth/ulc_config.go Normal file
View File

@ -0,0 +1,9 @@
package eth
const DefaultULCMinTrustedFraction = 75
// ULCConfig is a Ultra Light client options.
type ULCConfig struct {
TrustedServers []string `toml:",omitempty"` // A list of trusted servers
MinTrustedFraction int `toml:",omitempty"` // Minimum percentage of connected trusted servers to validate trusted (1-100)
}

31
les/backend.go
View File

@ -109,8 +109,12 @@ func New(ctx *node.ServiceContext, config *eth.Config) (*LightEthereum, error) {
bloomIndexer: eth.NewBloomIndexer(chainDb, params.BloomBitsBlocksClient, params.HelperTrieConfirmations),
}
var trustedNodes []string
if leth.config.ULC != nil {
trustedNodes = leth.config.ULC.TrustedServers
}
leth.relay = NewLesTxRelay(peers, leth.reqDist)
leth.serverPool = newServerPool(chainDb, quitSync, &leth.wg)
leth.serverPool = newServerPool(chainDb, quitSync, &leth.wg, trustedNodes)
leth.retriever = newRetrieveManager(peers, leth.reqDist, leth.serverPool)
leth.odr = NewLesOdr(chainDb, light.DefaultClientIndexerConfig, leth.retriever)
@ -136,10 +140,33 @@ func New(ctx *node.ServiceContext, config *eth.Config) (*LightEthereum, error) {
}
leth.txPool = light.NewTxPool(leth.chainConfig, leth.blockchain, leth.relay)
if leth.protocolManager, err = NewProtocolManager(leth.chainConfig, light.DefaultClientIndexerConfig, true, config.NetworkId, leth.eventMux, leth.engine, leth.peers, leth.blockchain, nil, chainDb, leth.odr, leth.relay, leth.serverPool, quitSync, &leth.wg); err != nil {
if leth.protocolManager, err = NewProtocolManager(
leth.chainConfig,
light.DefaultClientIndexerConfig,
true,
config.NetworkId,
leth.eventMux,
leth.engine,
leth.peers,
leth.blockchain,
nil,
chainDb,
leth.odr,
leth.relay,
leth.serverPool,
quitSync,
&leth.wg,
config.ULC); err != nil {
return nil, err
}
if leth.protocolManager.isULCEnabled() {
log.Warn("Ultra light client is enabled", "trustedNodes", len(leth.protocolManager.ulc.trustedKeys), "minTrustedFraction", leth.protocolManager.ulc.minTrustedFraction)
leth.blockchain.DisableCheckFreq()
}
leth.ApiBackend = &LesApiBackend{leth, nil}
gpoParams := config.GPO
if gpoParams.Default == nil {
gpoParams.Default = config.MinerGasPrice

306
les/fetcher.go
View File

@ -43,7 +43,7 @@ const (
type lightFetcher struct {
pm *ProtocolManager
odr *LesOdr
chain *light.LightChain
chain lightChain
lock sync.Mutex // lock protects access to the fetcher's internal state variables except sent requests
maxConfirmedTd *big.Int
@ -52,11 +52,19 @@ type lightFetcher struct {
syncing bool
syncDone chan *peer
reqMu sync.RWMutex // reqMu protects access to sent header fetch requests
requested map[uint64]fetchRequest
deliverChn chan fetchResponse
timeoutChn chan uint64
requestChn chan bool // true if initiated from outside
reqMu sync.RWMutex // reqMu protects access to sent header fetch requests
requested map[uint64]fetchRequest
deliverChn chan fetchResponse
timeoutChn chan uint64
requestChn chan bool // true if initiated from outside
lastTrustedHeader *types.Header
}
// lightChain extends the BlockChain interface by locking.
type lightChain interface {
BlockChain
LockChain()
UnlockChain()
}
// fetcherPeerInfo holds fetcher-specific information about each active peer
@ -145,6 +153,7 @@ func (f *lightFetcher) syncLoop() {
reqID uint64
syncing bool
)
if !f.syncing && !(newAnnounce && s) {
rq, reqID, syncing = f.nextRequest()
}
@ -227,7 +236,6 @@ func (f *lightFetcher) registerPeer(p *peer) {
f.lock.Lock()
defer f.lock.Unlock()
f.peers[p] = &fetcherPeerInfo{nodeByHash: make(map[common.Hash]*fetcherTreeNode)}
}
@ -280,8 +288,10 @@ func (f *lightFetcher) announce(p *peer, head *announceData) {
fp.nodeCnt = 0
fp.nodeByHash = make(map[common.Hash]*fetcherTreeNode)
}
// check if the node count is too high to add new nodes, discard oldest ones if necessary
if n != nil {
// check if the node count is too high to add new nodes, discard oldest ones if necessary
// n is now the reorg common ancestor, add a new branch of nodes
// check if the node count is too high to add new nodes
locked := false
for uint64(fp.nodeCnt)+head.Number-n.number > maxNodeCount && fp.root != nil {
if !locked {
@ -325,6 +335,7 @@ func (f *lightFetcher) announce(p *peer, head *announceData) {
fp.nodeByHash[n.hash] = n
}
}
if n == nil {
// could not find reorg common ancestor or had to delete entire tree, a new root and a resync is needed
if fp.root != nil {
@ -411,25 +422,13 @@ func (f *lightFetcher) requestedID(reqID uint64) bool {
// to be downloaded starting from the head backwards is also returned
func (f *lightFetcher) nextRequest() (*distReq, uint64, bool) {
var (
bestHash common.Hash
bestAmount uint64
bestHash common.Hash
bestAmount uint64
bestTd *big.Int
bestSyncing bool
)
bestTd := f.maxConfirmedTd
bestSyncing := false
bestHash, bestAmount, bestTd, bestSyncing = f.findBestRequest()
for p, fp := range f.peers {
for hash, n := range fp.nodeByHash {
if !f.checkKnownNode(p, n) && !n.requested && (bestTd == nil || n.td.Cmp(bestTd) >= 0) {
amount := f.requestAmount(p, n)
if bestTd == nil || n.td.Cmp(bestTd) > 0 || amount < bestAmount {
bestHash = hash
bestAmount = amount
bestTd = n.td
bestSyncing = fp.bestConfirmed == nil || fp.root == nil || !f.checkKnownNode(p, fp.root)
}
}
}
}
if bestTd == f.maxConfirmedTd {
return nil, 0, false
}
@ -437,74 +436,142 @@ func (f *lightFetcher) nextRequest() (*distReq, uint64, bool) {
var rq *distReq
reqID := genReqID()
if bestSyncing {
rq = &distReq{
getCost: func(dp distPeer) uint64 {
return 0
},
canSend: func(dp distPeer) bool {
p := dp.(*peer)
f.lock.Lock()
defer f.lock.Unlock()
fp := f.peers[p]
return fp != nil && fp.nodeByHash[bestHash] != nil
},
request: func(dp distPeer) func() {
go func() {
p := dp.(*peer)
p.Log().Debug("Synchronisation started")
f.pm.synchronise(p)
f.syncDone <- p
}()
return nil
},
}
rq = f.newFetcherDistReqForSync(bestHash)
} else {
rq = &distReq{
getCost: func(dp distPeer) uint64 {
p := dp.(*peer)
return p.GetRequestCost(GetBlockHeadersMsg, int(bestAmount))
},
canSend: func(dp distPeer) bool {
p := dp.(*peer)
f.lock.Lock()
defer f.lock.Unlock()
fp := f.peers[p]
if fp == nil {
return false
}
n := fp.nodeByHash[bestHash]
return n != nil && !n.requested
},
request: func(dp distPeer) func() {
p := dp.(*peer)
f.lock.Lock()
fp := f.peers[p]
if fp != nil {
n := fp.nodeByHash[bestHash]
if n != nil {
n.requested = true
}
}
f.lock.Unlock()
cost := p.GetRequestCost(GetBlockHeadersMsg, int(bestAmount))
p.fcServer.QueueRequest(reqID, cost)
f.reqMu.Lock()
f.requested[reqID] = fetchRequest{hash: bestHash, amount: bestAmount, peer: p, sent: mclock.Now()}
f.reqMu.Unlock()
go func() {
time.Sleep(hardRequestTimeout)
f.timeoutChn <- reqID
}()
return func() { p.RequestHeadersByHash(reqID, cost, bestHash, int(bestAmount), 0, true) }
},
}
rq = f.newFetcherDistReq(bestHash, reqID, bestAmount)
}
return rq, reqID, bestSyncing
}
// findBestRequest finds the best head to request that has been announced by but not yet requested from a known peer.
// It also returns the announced Td (which should be verified after fetching the head),
// the necessary amount to request and whether a downloader sync is necessary instead of a normal header request.
func (f *lightFetcher) findBestRequest() (bestHash common.Hash, bestAmount uint64, bestTd *big.Int, bestSyncing bool) {
bestTd = f.maxConfirmedTd
bestSyncing = false
for p, fp := range f.peers {
for hash, n := range fp.nodeByHash {
if f.checkKnownNode(p, n) || n.requested {
continue
}
//if ulc mode is disabled, isTrustedHash returns true
amount := f.requestAmount(p, n)
if (bestTd == nil || n.td.Cmp(bestTd) > 0 || amount < bestAmount) && (f.isTrustedHash(hash) || f.maxConfirmedTd.Int64() == 0) {
bestHash = hash
bestTd = n.td
bestAmount = amount
bestSyncing = fp.bestConfirmed == nil || fp.root == nil || !f.checkKnownNode(p, fp.root)
}
}
}
return
}
// isTrustedHash checks if the block can be trusted by the minimum trusted fraction.
func (f *lightFetcher) isTrustedHash(hash common.Hash) bool {
if !f.pm.isULCEnabled() {
return true
}
var numAgreed int
for p, fp := range f.peers {
if !p.isTrusted {
continue
}
if _, ok := fp.nodeByHash[hash]; !ok {
continue
}
numAgreed++
}
return 100*numAgreed/len(f.pm.ulc.trustedKeys) >= f.pm.ulc.minTrustedFraction
}
func (f *lightFetcher) newFetcherDistReqForSync(bestHash common.Hash) *distReq {
return &distReq{
getCost: func(dp distPeer) uint64 {
return 0
},
canSend: func(dp distPeer) bool {
p := dp.(*peer)
f.lock.Lock()
defer f.lock.Unlock()
if p.isOnlyAnnounce {
return false
}
fp := f.peers[p]
return fp != nil && fp.nodeByHash[bestHash] != nil
},
request: func(dp distPeer) func() {
if f.pm.isULCEnabled() {
//keep last trusted header before sync
f.setLastTrustedHeader(f.chain.CurrentHeader())
}
go func() {
p := dp.(*peer)
p.Log().Debug("Synchronisation started")
f.pm.synchronise(p)
f.syncDone <- p
}()
return nil
},
}
}
// newFetcherDistReq creates a new request for the distributor.
func (f *lightFetcher) newFetcherDistReq(bestHash common.Hash, reqID uint64, bestAmount uint64) *distReq {
return &distReq{
getCost: func(dp distPeer) uint64 {
p := dp.(*peer)
return p.GetRequestCost(GetBlockHeadersMsg, int(bestAmount))
},
canSend: func(dp distPeer) bool {
p := dp.(*peer)
f.lock.Lock()
defer f.lock.Unlock()
if p.isOnlyAnnounce {
return false
}
fp := f.peers[p]
if fp == nil {
return false
}
n := fp.nodeByHash[bestHash]
return n != nil && !n.requested
},
request: func(dp distPeer) func() {
p := dp.(*peer)
f.lock.Lock()
fp := f.peers[p]
if fp != nil {
n := fp.nodeByHash[bestHash]
if n != nil {
n.requested = true
}
}
f.lock.Unlock()
cost := p.GetRequestCost(GetBlockHeadersMsg, int(bestAmount))
p.fcServer.QueueRequest(reqID, cost)
f.reqMu.Lock()
f.requested[reqID] = fetchRequest{hash: bestHash, amount: bestAmount, peer: p, sent: mclock.Now()}
f.reqMu.Unlock()
go func() {
time.Sleep(hardRequestTimeout)
f.timeoutChn <- reqID
}()
return func() { p.RequestHeadersByHash(reqID, cost, bestHash, int(bestAmount), 0, true) }
},
}
}
// deliverHeaders delivers header download request responses for processing
func (f *lightFetcher) deliverHeaders(peer *peer, reqID uint64, headers []*types.Header) {
f.deliverChn <- fetchResponse{reqID: reqID, headers: headers, peer: peer}
@ -520,6 +587,7 @@ func (f *lightFetcher) processResponse(req fetchRequest, resp fetchResponse) boo
for i, header := range resp.headers {
headers[int(req.amount)-1-i] = header
}
if _, err := f.chain.InsertHeaderChain(headers, 1); err != nil {
if err == consensus.ErrFutureBlock {
return true
@ -544,6 +612,7 @@ func (f *lightFetcher) processResponse(req fetchRequest, resp fetchResponse) boo
// downloaded and validated batch or headers
func (f *lightFetcher) newHeaders(headers []*types.Header, tds []*big.Int) {
var maxTd *big.Int
for p, fp := range f.peers {
if !f.checkAnnouncedHeaders(fp, headers, tds) {
p.Log().Debug("Inconsistent announcement")
@ -553,6 +622,7 @@ func (f *lightFetcher) newHeaders(headers []*types.Header, tds []*big.Int) {
maxTd = fp.confirmedTd
}
}
if maxTd != nil {
f.updateMaxConfirmedTd(maxTd)
}
@ -640,22 +710,72 @@ func (f *lightFetcher) checkSyncedHeaders(p *peer) {
p.Log().Debug("Unknown peer to check sync headers")
return
}
n := fp.lastAnnounced
var td *big.Int
var h *types.Header
if f.pm.isULCEnabled() {
var unapprovedHashes []common.Hash
// Overwrite last announced for ULC mode
h, unapprovedHashes = f.lastTrustedTreeNode(p)
//rollback untrusted blocks
f.chain.Rollback(unapprovedHashes)
//overwrite to last trusted
n = fp.nodeByHash[h.Hash()]
}
//find last valid block
for n != nil {
if td = f.chain.GetTd(n.hash, n.number); td != nil {
break
}
n = n.parent
}
// now n is the latest downloaded header after syncing
// Now n is the latest downloaded/approved header after syncing
if n == nil {
p.Log().Debug("Synchronisation failed")
go f.pm.removePeer(p.id)
} else {
header := f.chain.GetHeader(n.hash, n.number)
f.newHeaders([]*types.Header{header}, []*big.Int{td})
return
}
header := f.chain.GetHeader(n.hash, n.number)
f.newHeaders([]*types.Header{header}, []*big.Int{td})
}
// lastTrustedTreeNode return last approved treeNode and a list of unapproved hashes
func (f *lightFetcher) lastTrustedTreeNode(p *peer) (*types.Header, []common.Hash) {
unapprovedHashes := make([]common.Hash, 0)
current := f.chain.CurrentHeader()
if f.lastTrustedHeader == nil {
return current, unapprovedHashes
}
canonical := f.chain.CurrentHeader()
if canonical.Number.Uint64() > f.lastTrustedHeader.Number.Uint64() {
canonical = f.chain.GetHeaderByNumber(f.lastTrustedHeader.Number.Uint64())
}
commonAncestor := rawdb.FindCommonAncestor(f.pm.chainDb, canonical, f.lastTrustedHeader)
if commonAncestor == nil {
log.Error("Common ancestor of last trusted header and canonical header is nil", "canonical hash", canonical.Hash(), "trusted hash", f.lastTrustedHeader.Hash())
return current, unapprovedHashes
}
for current.Hash() == commonAncestor.Hash() {
if f.isTrustedHash(current.Hash()) {
break
}
unapprovedHashes = append(unapprovedHashes, current.Hash())
current = f.chain.GetHeader(current.ParentHash, current.Number.Uint64()-1)
}
return current, unapprovedHashes
}
func (f *lightFetcher) setLastTrustedHeader(h *types.Header) {
f.lock.Lock()
defer f.lock.Unlock()
f.lastTrustedHeader = h
}
// checkKnownNode checks if a block tree node is known (downloaded and validated)
@ -747,6 +867,7 @@ func (f *lightFetcher) updateMaxConfirmedTd(td *big.Int) {
if f.lastUpdateStats != nil {
f.lastUpdateStats.next = newEntry
}
f.lastUpdateStats = newEntry
for p := range f.peers {
f.checkUpdateStats(p, newEntry)
@ -769,6 +890,7 @@ func (f *lightFetcher) checkUpdateStats(p *peer, newEntry *updateStatsEntry) {
p.Log().Debug("Unknown peer to check update stats")
return
}
if newEntry != nil && fp.firstUpdateStats == nil {
fp.firstUpdateStats = newEntry
}

155
les/fetcher_test.go Normal file
View File

@ -0,0 +1,155 @@
package les
import (
"math/big"
"testing"
"net"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
)
func TestFetcherULCPeerSelector(t *testing.T) {
var (
id1 enode.ID = newNodeID(t).ID()
id2 enode.ID = newNodeID(t).ID()
id3 enode.ID = newNodeID(t).ID()
id4 enode.ID = newNodeID(t).ID()
)
ftn1 := &fetcherTreeNode{
hash: common.HexToHash("1"),
td: big.NewInt(1),
}
ftn2 := &fetcherTreeNode{
hash: common.HexToHash("2"),
td: big.NewInt(2),
parent: ftn1,
}
ftn3 := &fetcherTreeNode{
hash: common.HexToHash("3"),
td: big.NewInt(3),
parent: ftn2,
}
lf := lightFetcher{
pm: &ProtocolManager{
ulc: &ulc{
trustedKeys: map[string]struct{}{
id1.String(): {},
id2.String(): {},
id3.String(): {},
id4.String(): {},
},
minTrustedFraction: 70,
},
},
maxConfirmedTd: ftn1.td,
peers: map[*peer]*fetcherPeerInfo{
{
id: "peer1",
Peer: p2p.NewPeer(id1, "peer1", []p2p.Cap{}),
isTrusted: true,
}: {
nodeByHash: map[common.Hash]*fetcherTreeNode{
ftn1.hash: ftn1,
ftn2.hash: ftn2,
},
},
{
Peer: p2p.NewPeer(id2, "peer2", []p2p.Cap{}),
id: "peer2",
isTrusted: true,
}: {
nodeByHash: map[common.Hash]*fetcherTreeNode{
ftn1.hash: ftn1,
ftn2.hash: ftn2,
},
},
{
id: "peer3",
Peer: p2p.NewPeer(id3, "peer3", []p2p.Cap{}),
isTrusted: true,
}: {
nodeByHash: map[common.Hash]*fetcherTreeNode{
ftn1.hash: ftn1,
ftn2.hash: ftn2,
ftn3.hash: ftn3,
},
},
{
id: "peer4",
Peer: p2p.NewPeer(id4, "peer4", []p2p.Cap{}),
isTrusted: true,
}: {
nodeByHash: map[common.Hash]*fetcherTreeNode{
ftn1.hash: ftn1,
},
},
},
chain: &lightChainStub{
tds: map[common.Hash]*big.Int{},
headers: map[common.Hash]*types.Header{
ftn1.hash: {},
ftn2.hash: {},
ftn3.hash: {},
},
},
}
bestHash, bestAmount, bestTD, sync := lf.findBestRequest()
if bestTD == nil {
t.Fatal("Empty result")
}
if bestTD.Cmp(ftn2.td) != 0 {
t.Fatal("bad td", bestTD)
}
if bestHash != ftn2.hash {
t.Fatal("bad hash", bestTD)
}
_, _ = bestAmount, sync
}
type lightChainStub struct {
BlockChain
tds map[common.Hash]*big.Int
headers map[common.Hash]*types.Header
insertHeaderChainAssertFunc func(chain []*types.Header, checkFreq int) (int, error)
}
func (l *lightChainStub) GetHeader(hash common.Hash, number uint64) *types.Header {
if h, ok := l.headers[hash]; ok {
return h
}
return nil
}
func (l *lightChainStub) LockChain() {}
func (l *lightChainStub) UnlockChain() {}
func (l *lightChainStub) GetTd(hash common.Hash, number uint64) *big.Int {
if td, ok := l.tds[hash]; ok {
return td
}
return nil
}
func (l *lightChainStub) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
return l.insertHeaderChainAssertFunc(chain, checkFreq)
}
func newNodeID(t *testing.T) *enode.Node {
key, err := crypto.GenerateKey()
if err != nil {
t.Fatal("generate key err:", err)
}
return enode.NewV4(&key.PublicKey, net.IP{}, 35000, 35000)
}

47
les/handler.go
View File

@ -33,6 +33,7 @@ import (
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
@ -119,12 +120,29 @@ type ProtocolManager struct {
// wait group is used for graceful shutdowns during downloading
// and processing
wg *sync.WaitGroup
wg *sync.WaitGroup
ulc *ulc
}
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
// with the ethereum network.
func NewProtocolManager(chainConfig *params.ChainConfig, indexerConfig *light.IndexerConfig, lightSync bool, networkId uint64, mux *event.TypeMux, engine consensus.Engine, peers *peerSet, blockchain BlockChain, txpool txPool, chainDb ethdb.Database, odr *LesOdr, txrelay *LesTxRelay, serverPool *serverPool, quitSync chan struct{}, wg *sync.WaitGroup) (*ProtocolManager, error) {
func NewProtocolManager(
chainConfig *params.ChainConfig,
indexerConfig *light.IndexerConfig,
lightSync bool,
networkId uint64,
mux *event.TypeMux,
engine consensus.Engine,
peers *peerSet,
blockchain BlockChain,
txpool txPool,
chainDb ethdb.Database,
odr *LesOdr,
txrelay *LesTxRelay,
serverPool *serverPool,
quitSync chan struct{},
wg *sync.WaitGroup,
ulcConfig *eth.ULCConfig) (*ProtocolManager, error) {
// Create the protocol manager with the base fields
manager := &ProtocolManager{
lightSync: lightSync,
@ -149,6 +167,10 @@ func NewProtocolManager(chainConfig *params.ChainConfig, indexerConfig *light.In
manager.reqDist = odr.retriever.dist
}
if ulcConfig != nil {
manager.ulc = newULC(ulcConfig)
}
removePeer := manager.removePeer
if disableClientRemovePeer {
removePeer = func(id string) {}
@ -234,7 +256,11 @@ func (pm *ProtocolManager) runPeer(version uint, p *p2p.Peer, rw p2p.MsgReadWrit
}
func (pm *ProtocolManager) newPeer(pv int, nv uint64, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
return newPeer(pv, nv, p, newMeteredMsgWriter(rw))
var isTrusted bool
if pm.isULCEnabled() {
isTrusted = pm.ulc.isTrusted(p.ID())
}
return newPeer(pv, nv, isTrusted, p, newMeteredMsgWriter(rw))
}
// handle is the callback invoked to manage the life cycle of a les peer. When
@ -276,6 +302,7 @@ func (pm *ProtocolManager) handle(p *peer) error {
if rw, ok := p.rw.(*meteredMsgReadWriter); ok {
rw.Init(p.version)
}
// Register the peer locally
if err := pm.peers.Register(p); err != nil {
p.Log().Error("Light Ethereum peer registration failed", "err", err)
@ -287,6 +314,7 @@ func (pm *ProtocolManager) handle(p *peer) error {
}
pm.removePeer(p.id)
}()
// Register the peer in the downloader. If the downloader considers it banned, we disconnect
if pm.lightSync {
p.lock.Lock()
@ -371,16 +399,15 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
// Block header query, collect the requested headers and reply
case AnnounceMsg:
p.Log().Trace("Received announce message")
if p.requestAnnounceType == announceTypeNone {
if p.announceType == announceTypeNone {
return errResp(ErrUnexpectedResponse, "")
}
var req announceData
if err := msg.Decode(&req); err != nil {
return errResp(ErrDecode, "%v: %v", msg, err)
}
if p.requestAnnounceType == announceTypeSigned {
if p.announceType == announceTypeSigned {
if err := req.checkSignature(p.ID()); err != nil {
p.Log().Trace("Invalid announcement signature", "err", err)
return err
@ -1175,6 +1202,14 @@ func (pm *ProtocolManager) txStatus(hashes []common.Hash) []txStatus {
return stats
}
// isULCEnabled returns true if we can use ULC
func (pm *ProtocolManager) isULCEnabled() bool {
if pm.ulc == nil || len(pm.ulc.trustedKeys) == 0 {
return false
}
return true
}
// downloaderPeerNotify implements peerSetNotify
type downloaderPeerNotify ProtocolManager

2
les/handler_test.go
View File

@ -494,7 +494,7 @@ func TestGetBloombitsProofs(t *testing.T) {
func TestTransactionStatusLes2(t *testing.T) {
db := ethdb.NewMemDatabase()
pm := newTestProtocolManagerMust(t, false, 0, nil, nil, nil, db)
pm := newTestProtocolManagerMust(t, false, 0, nil, nil, nil, db, nil)
chain := pm.blockchain.(*core.BlockChain)
config := core.DefaultTxPoolConfig
config.Journal = ""

14
les/helper_test.go
View File

@ -146,7 +146,7 @@ func testRCL() RequestCostList {
// newTestProtocolManager creates a new protocol manager for testing purposes,
// with the given number of blocks already known, potential notification
// channels for different events and relative chain indexers array.
func newTestProtocolManager(lightSync bool, blocks int, generator func(int, *core.BlockGen), odr *LesOdr, peers *peerSet, db ethdb.Database) (*ProtocolManager, error) {
func newTestProtocolManager(lightSync bool, blocks int, generator func(int, *core.BlockGen), odr *LesOdr, peers *peerSet, db ethdb.Database, ulcConfig *eth.ULCConfig) (*ProtocolManager, error) {
var (
evmux = new(event.TypeMux)
engine = ethash.NewFaker()
@ -176,7 +176,7 @@ func newTestProtocolManager(lightSync bool, blocks int, generator func(int, *cor
if lightSync {
indexConfig = light.TestClientIndexerConfig
}
pm, err := NewProtocolManager(gspec.Config, indexConfig, lightSync, NetworkId, evmux, engine, peers, chain, nil, db, odr, nil, nil, make(chan struct{}), new(sync.WaitGroup))
pm, err := NewProtocolManager(gspec.Config, indexConfig, lightSync, NetworkId, evmux, engine, peers, chain, nil, db, odr, nil, nil, make(chan struct{}), new(sync.WaitGroup), ulcConfig)
if err != nil {
return nil, err
}
@ -200,8 +200,8 @@ func newTestProtocolManager(lightSync bool, blocks int, generator func(int, *cor
// with the given number of blocks already known, potential notification
// channels for different events and relative chain indexers array. In case of an error, the constructor force-
// fails the test.
func newTestProtocolManagerMust(t *testing.T, lightSync bool, blocks int, generator func(int, *core.BlockGen), odr *LesOdr, peers *peerSet, db ethdb.Database) *ProtocolManager {
pm, err := newTestProtocolManager(lightSync, blocks, generator, odr, peers, db)
func newTestProtocolManagerMust(t *testing.T, lightSync bool, blocks int, generator func(int, *core.BlockGen), odr *LesOdr, peers *peerSet, db ethdb.Database, ulcConfig *eth.ULCConfig) *ProtocolManager {
pm, err := newTestProtocolManager(lightSync, blocks, generator, odr, peers, db, ulcConfig)
if err != nil {
t.Fatalf("Failed to create protocol manager: %v", err)
}
@ -343,7 +343,7 @@ func newServerEnv(t *testing.T, blocks int, protocol int, waitIndexers func(*cor
db := ethdb.NewMemDatabase()
cIndexer, bIndexer, btIndexer := testIndexers(db, nil, light.TestServerIndexerConfig)
pm := newTestProtocolManagerMust(t, false, blocks, testChainGen, nil, nil, db)
pm := newTestProtocolManagerMust(t, false, blocks, testChainGen, nil, nil, db, nil)
peer, _ := newTestPeer(t, "peer", protocol, pm, true)
cIndexer.Start(pm.blockchain.(*core.BlockChain))
@ -383,8 +383,8 @@ func newClientServerEnv(t *testing.T, blocks int, protocol int, waitIndexers fun
lcIndexer, lbIndexer, lbtIndexer := testIndexers(ldb, odr, light.TestClientIndexerConfig)
odr.SetIndexers(lcIndexer, lbtIndexer, lbIndexer)
pm := newTestProtocolManagerMust(t, false, blocks, testChainGen, nil, peers, db)
lpm := newTestProtocolManagerMust(t, true, 0, nil, odr, lPeers, ldb)
pm := newTestProtocolManagerMust(t, false, blocks, testChainGen, nil, peers, db, nil)
lpm := newTestProtocolManagerMust(t, true, 0, nil, odr, lPeers, ldb, nil)
startIndexers := func(clientMode bool, pm *ProtocolManager) {
if clientMode {

5
les/odr.go
View File

@ -109,7 +109,10 @@ func (odr *LesOdr) Retrieve(ctx context.Context, req light.OdrRequest) (err erro
},
canSend: func(dp distPeer) bool {
p := dp.(*peer)
return lreq.CanSend(p)
if !p.isOnlyAnnounce {
return lreq.CanSend(p)
}
return false
},
request: func(dp distPeer) func() {
p := dp.(*peer)

46
les/peer.go
View File

@ -56,7 +56,7 @@ type peer struct {
version int // Protocol version negotiated
network uint64 // Network ID being on
announceType, requestAnnounceType uint64
announceType uint64
id string
@ -74,9 +74,12 @@ type peer struct {
fcServer *flowcontrol.ServerNode // nil if the peer is client only
fcServerParams *flowcontrol.ServerParams
fcCosts requestCostTable
isTrusted bool
isOnlyAnnounce bool
}
func newPeer(version int, network uint64, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
func newPeer(version int, network uint64, isTrusted bool, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
id := p.ID()
return &peer{
@ -86,6 +89,7 @@ func newPeer(version int, network uint64, p *p2p.Peer, rw p2p.MsgReadWriter) *pe
network: network,
id: fmt.Sprintf("%x", id[:8]),
announceChn: make(chan announceData, 20),
isTrusted: isTrusted,
}
}
@ -401,23 +405,32 @@ func (p *peer) Handshake(td *big.Int, head common.Hash, headNum uint64, genesis
send = send.add("headNum", headNum)
send = send.add("genesisHash", genesis)
if server != nil {
send = send.add("serveHeaders", nil)
send = send.add("serveChainSince", uint64(0))
send = send.add("serveStateSince", uint64(0))
send = send.add("txRelay", nil)
if !server.onlyAnnounce {
//only announce server. It sends only announse requests
send = send.add("serveHeaders", nil)
send = send.add("serveChainSince", uint64(0))
send = send.add("serveStateSince", uint64(0))
send = send.add("txRelay", nil)
}
send = send.add("flowControl/BL", server.defParams.BufLimit)
send = send.add("flowControl/MRR", server.defParams.MinRecharge)
list := server.fcCostStats.getCurrentList()
send = send.add("flowControl/MRC", list)
p.fcCosts = list.decode()
} else {
p.requestAnnounceType = announceTypeSimple // set to default until "very light" client mode is implemented
send = send.add("announceType", p.requestAnnounceType)
//on client node
p.announceType = announceTypeSimple
if p.isTrusted {
p.announceType = announceTypeSigned
}
send = send.add("announceType", p.announceType)
}
recvList, err := p.sendReceiveHandshake(send)
if err != nil {
return err
}
recv := recvList.decode()
var rGenesis, rHash common.Hash
@ -452,25 +465,33 @@ func (p *peer) Handshake(td *big.Int, head common.Hash, headNum uint64, genesis
if int(rVersion) != p.version {
return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", rVersion, p.version)
}
if server != nil {
// until we have a proper peer connectivity API, allow LES connection to other servers
/*if recv.get("serveStateSince", nil) == nil {
return errResp(ErrUselessPeer, "wanted client, got server")
}*/
if recv.get("announceType", &p.announceType) != nil {
//set default announceType on server side
p.announceType = announceTypeSimple
}
p.fcClient = flowcontrol.NewClientNode(server.fcManager, server.defParams)
} else {
//mark OnlyAnnounce server if "serveHeaders", "serveChainSince", "serveStateSince" or "txRelay" fields don't exist
if recv.get("serveChainSince", nil) != nil {
return errResp(ErrUselessPeer, "peer cannot serve chain")
p.isOnlyAnnounce = true
}
if recv.get("serveStateSince", nil) != nil {
return errResp(ErrUselessPeer, "peer cannot serve state")
p.isOnlyAnnounce = true
}
if recv.get("txRelay", nil) != nil {
return errResp(ErrUselessPeer, "peer cannot relay transactions")
p.isOnlyAnnounce = true
}
if p.isOnlyAnnounce && !p.isTrusted {
return errResp(ErrUselessPeer, "peer cannot serve requests")
}
params := &flowcontrol.ServerParams{}
if err := recv.get("flowControl/BL", &params.BufLimit); err != nil {
return err
@ -486,7 +507,6 @@ func (p *peer) Handshake(td *big.Int, head common.Hash, headNum uint64, genesis
p.fcServer = flowcontrol.NewServerNode(params)
p.fcCosts = MRC.decode()
}
p.headInfo = &announceData{Td: rTd, Hash: rHash, Number: rNum}
return nil
}
@ -576,8 +596,10 @@ func (ps *peerSet) Unregister(id string) error {
for _, n := range peers {
n.unregisterPeer(p)
}
p.sendQueue.quit()
p.Peer.Disconnect(p2p.DiscUselessPeer)
return nil
}
}

297
les/peer_test.go Normal file
View File

@ -0,0 +1,297 @@
package les
import (
"math/big"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/les/flowcontrol"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/rlp"
)
const (
test_networkid = 10
protocol_version = 2123
)
var (
hash = common.HexToHash("some string")
genesis = common.HexToHash("genesis hash")
headNum = uint64(1234)
td = big.NewInt(123)
)
//ulc connects to trusted peer and send announceType=announceTypeSigned
func TestPeerHandshakeSetAnnounceTypeToAnnounceTypeSignedForTrustedPeer(t *testing.T) {
var id enode.ID = newNodeID(t).ID()
//peer to connect(on ulc side)
p := peer{
Peer: p2p.NewPeer(id, "test peer", []p2p.Cap{}),
version: protocol_version,
isTrusted: true,
rw: &rwStub{
WriteHook: func(recvList keyValueList) {
//checking that ulc sends to peer allowedRequests=onlyAnnounceRequests and announceType = announceTypeSigned
recv := recvList.decode()
var reqType uint64
err := recv.get("announceType", &reqType)
if err != nil {
t.Fatal(err)
}
if reqType != announceTypeSigned {
t.Fatal("Expected announceTypeSigned")
}
},
ReadHook: func(l keyValueList) keyValueList {
l = l.add("serveHeaders", nil)
l = l.add("serveChainSince", uint64(0))
l = l.add("serveStateSince", uint64(0))
l = l.add("txRelay", nil)
l = l.add("flowControl/BL", uint64(0))
l = l.add("flowControl/MRR", uint64(0))
l = l.add("flowControl/MRC", RequestCostList{})
return l
},
},
network: test_networkid,
}
err := p.Handshake(td, hash, headNum, genesis, nil)
if err != nil {
t.Fatalf("Handshake error: %s", err)
}
if p.announceType != announceTypeSigned {
t.Fatal("Incorrect announceType")
}
}
func TestPeerHandshakeAnnounceTypeSignedForTrustedPeersPeerNotInTrusted(t *testing.T) {
var id enode.ID = newNodeID(t).ID()
p := peer{
Peer: p2p.NewPeer(id, "test peer", []p2p.Cap{}),
version: protocol_version,
rw: &rwStub{
WriteHook: func(recvList keyValueList) {
//checking that ulc sends to peer allowedRequests=noRequests and announceType != announceTypeSigned
recv := recvList.decode()
var reqType uint64
err := recv.get("announceType", &reqType)
if err != nil {
t.Fatal(err)
}
if reqType == announceTypeSigned {
t.Fatal("Expected not announceTypeSigned")
}
},
ReadHook: func(l keyValueList) keyValueList {
l = l.add("serveHeaders", nil)
l = l.add("serveChainSince", uint64(0))
l = l.add("serveStateSince", uint64(0))
l = l.add("txRelay", nil)
l = l.add("flowControl/BL", uint64(0))
l = l.add("flowControl/MRR", uint64(0))
l = l.add("flowControl/MRC", RequestCostList{})
return l
},
},
network: test_networkid,
}
err := p.Handshake(td, hash, headNum, genesis, nil)
if err != nil {
t.Fatal(err)
}
if p.announceType == announceTypeSigned {
t.Fatal("Incorrect announceType")
}
}
func TestPeerHandshakeDefaultAllRequests(t *testing.T) {
var id enode.ID = newNodeID(t).ID()
s := generateLesServer()
p := peer{
Peer: p2p.NewPeer(id, "test peer", []p2p.Cap{}),
version: protocol_version,
rw: &rwStub{
ReadHook: func(l keyValueList) keyValueList {
l = l.add("announceType", uint64(announceTypeSigned))
l = l.add("allowedRequests", uint64(0))
return l
},
},
network: test_networkid,
}
err := p.Handshake(td, hash, headNum, genesis, s)
if err != nil {
t.Fatal(err)
}
if p.isOnlyAnnounce {
t.Fatal("Incorrect announceType")
}
}
func TestPeerHandshakeServerSendOnlyAnnounceRequestsHeaders(t *testing.T) {
var id enode.ID = newNodeID(t).ID()
s := generateLesServer()
s.onlyAnnounce = true
p := peer{
Peer: p2p.NewPeer(id, "test peer", []p2p.Cap{}),
version: protocol_version,
rw: &rwStub{
ReadHook: func(l keyValueList) keyValueList {
l = l.add("announceType", uint64(announceTypeSigned))
return l
},
WriteHook: func(l keyValueList) {
for _, v := range l {
if v.Key == "serveHeaders" ||
v.Key == "serveChainSince" ||
v.Key == "serveStateSince" ||
v.Key == "txRelay" {
t.Fatalf("%v exists", v.Key)
}
}
},
},
network: test_networkid,
}
err := p.Handshake(td, hash, headNum, genesis, s)
if err != nil {
t.Fatal(err)
}
}
func TestPeerHandshakeClientReceiveOnlyAnnounceRequestsHeaders(t *testing.T) {
var id enode.ID = newNodeID(t).ID()
p := peer{
Peer: p2p.NewPeer(id, "test peer", []p2p.Cap{}),
version: protocol_version,
rw: &rwStub{
ReadHook: func(l keyValueList) keyValueList {
l = l.add("flowControl/BL", uint64(0))
l = l.add("flowControl/MRR", uint64(0))
l = l.add("flowControl/MRC", RequestCostList{})
l = l.add("announceType", uint64(announceTypeSigned))
return l
},
},
network: test_networkid,
isTrusted: true,
}
err := p.Handshake(td, hash, headNum, genesis, nil)
if err != nil {
t.Fatal(err)
}
if !p.isOnlyAnnounce {
t.Fatal("isOnlyAnnounce must be true")
}
}
func TestPeerHandshakeClientReturnErrorOnUselessPeer(t *testing.T) {
var id enode.ID = newNodeID(t).ID()
p := peer{
Peer: p2p.NewPeer(id, "test peer", []p2p.Cap{}),
version: protocol_version,
rw: &rwStub{
ReadHook: func(l keyValueList) keyValueList {
l = l.add("flowControl/BL", uint64(0))
l = l.add("flowControl/MRR", uint64(0))
l = l.add("flowControl/MRC", RequestCostList{})
l = l.add("announceType", uint64(announceTypeSigned))
return l
},
},
network: test_networkid,
}
err := p.Handshake(td, hash, headNum, genesis, nil)
if err == nil {
t.FailNow()
}
}
func generateLesServer() *LesServer {
s := &LesServer{
defParams: &flowcontrol.ServerParams{
BufLimit: uint64(300000000),
MinRecharge: uint64(50000),
},
fcManager: flowcontrol.NewClientManager(1, 2, 3),
fcCostStats: &requestCostStats{
stats: make(map[uint64]*linReg, len(reqList)),
},
}
for _, code := range reqList {
s.fcCostStats.stats[code] = &linReg{cnt: 100}
}
return s
}
type rwStub struct {
ReadHook func(l keyValueList) keyValueList
WriteHook func(l keyValueList)
}
func (s *rwStub) ReadMsg() (p2p.Msg, error) {
payload := keyValueList{}
payload = payload.add("protocolVersion", uint64(protocol_version))
payload = payload.add("networkId", uint64(test_networkid))
payload = payload.add("headTd", td)
payload = payload.add("headHash", hash)
payload = payload.add("headNum", headNum)
payload = payload.add("genesisHash", genesis)
if s.ReadHook != nil {
payload = s.ReadHook(payload)
}
size, p, err := rlp.EncodeToReader(payload)
if err != nil {
return p2p.Msg{}, err
}
return p2p.Msg{
Size: uint32(size),
Payload: p,
}, nil
}
func (s *rwStub) WriteMsg(m p2p.Msg) error {
recvList := keyValueList{}
if err := m.Decode(&recvList); err != nil {
return err
}
if s.WriteHook != nil {
s.WriteHook(recvList)
}
return nil
}

38
les/server.go
View File

@ -41,17 +41,34 @@ import (
type LesServer struct {
lesCommons
fcManager *flowcontrol.ClientManager // nil if our node is client only
fcCostStats *requestCostStats
defParams *flowcontrol.ServerParams
lesTopics []discv5.Topic
privateKey *ecdsa.PrivateKey
quitSync chan struct{}
fcManager *flowcontrol.ClientManager // nil if our node is client only
fcCostStats *requestCostStats
defParams *flowcontrol.ServerParams
lesTopics []discv5.Topic
privateKey *ecdsa.PrivateKey
quitSync chan struct{}
onlyAnnounce bool
}
func NewLesServer(eth *eth.Ethereum, config *eth.Config) (*LesServer, error) {
quitSync := make(chan struct{})
pm, err := NewProtocolManager(eth.BlockChain().Config(), light.DefaultServerIndexerConfig, false, config.NetworkId, eth.EventMux(), eth.Engine(), newPeerSet(), eth.BlockChain(), eth.TxPool(), eth.ChainDb(), nil, nil, nil, quitSync, new(sync.WaitGroup))
pm, err := NewProtocolManager(
eth.BlockChain().Config(),
light.DefaultServerIndexerConfig,
false,
config.NetworkId,
eth.EventMux(),
eth.Engine(),
newPeerSet(),
eth.BlockChain(),
eth.TxPool(),
eth.ChainDb(),
nil,
nil,
nil,
quitSync,
new(sync.WaitGroup),
config.ULC)
if err != nil {
return nil, err
}
@ -70,8 +87,9 @@ func NewLesServer(eth *eth.Ethereum, config *eth.Config) (*LesServer, error) {
bloomTrieIndexer: light.NewBloomTrieIndexer(eth.ChainDb(), nil, params.BloomBitsBlocks, params.BloomTrieFrequency),
protocolManager: pm,
},
quitSync: quitSync,
lesTopics: lesTopics,
quitSync: quitSync,
lesTopics: lesTopics,
onlyAnnounce: config.OnlyAnnounce,
}
logger := log.New()
@ -289,10 +307,8 @@ func (s *requestCostStats) getCurrentList() RequestCostList {
defer s.lock.Unlock()
list := make(RequestCostList, len(reqList))
//fmt.Println("RequestCostList")
for idx, code := range reqList {
b, m := s.stats[code].calc()
//fmt.Println(code, s.stats[code].cnt, b/1000000, m/1000000)
if m < 0 {
b += m
m = 0

101
les/serverpool.go
View File

@ -126,22 +126,22 @@ type serverPool struct {
discNodes chan *enode.Node
discLookups chan bool
trustedNodes map[enode.ID]*enode.Node
entries map[enode.ID]*poolEntry
timeout, enableRetry chan *poolEntry
adjustStats chan poolStatAdjust
connCh chan *connReq
disconnCh chan *disconnReq
registerCh chan *registerReq
knownQueue, newQueue poolEntryQueue
knownSelect, newSelect *weightedRandomSelect
knownSelected, newSelected int
fastDiscover bool
connCh chan *connReq
disconnCh chan *disconnReq
registerCh chan *registerReq
}
// newServerPool creates a new serverPool instance
func newServerPool(db ethdb.Database, quit chan struct{}, wg *sync.WaitGroup) *serverPool {
func newServerPool(db ethdb.Database, quit chan struct{}, wg *sync.WaitGroup, trustedNodes []string) *serverPool {
pool := &serverPool{
db: db,
quit: quit,
@ -156,7 +156,9 @@ func newServerPool(db ethdb.Database, quit chan struct{}, wg *sync.WaitGroup) *s
knownSelect: newWeightedRandomSelect(),
newSelect: newWeightedRandomSelect(),
fastDiscover: true,
trustedNodes: parseTrustedNodes(trustedNodes),
}
pool.knownQueue = newPoolEntryQueue(maxKnownEntries, pool.removeEntry)
pool.newQueue = newPoolEntryQueue(maxNewEntries, pool.removeEntry)
return pool
@ -168,6 +170,7 @@ func (pool *serverPool) start(server *p2p.Server, topic discv5.Topic) {
pool.dbKey = append([]byte("serverPool/"), []byte(topic)...)
pool.wg.Add(1)
pool.loadNodes()
pool.connectToTrustedNodes()
if pool.server.DiscV5 != nil {
pool.discSetPeriod = make(chan time.Duration, 1)
@ -337,8 +340,10 @@ func (pool *serverPool) eventLoop() {
}
case node := <-pool.discNodes:
entry := pool.findOrNewNode(node)
pool.updateCheckDial(entry)
if pool.trustedNodes[node.ID()] == nil {
entry := pool.findOrNewNode(node)
pool.updateCheckDial(entry)
}
case conv := <-pool.discLookups:
if conv {
@ -355,29 +360,34 @@ func (pool *serverPool) eventLoop() {
}
case req := <-pool.connCh:
// Handle peer connection requests.
entry := pool.entries[req.p.ID()]
if entry == nil {
entry = pool.findOrNewNode(req.node)
}
if entry.state == psConnected || entry.state == psRegistered {
if pool.trustedNodes[req.p.ID()] != nil {
// ignore trusted nodes
req.result <- nil
continue
} else {
// Handle peer connection requests.
entry := pool.entries[req.p.ID()]
if entry == nil {
entry = pool.findOrNewNode(req.node)
}
if entry.state == psConnected || entry.state == psRegistered {
req.result <- nil
continue
}
pool.connWg.Add(1)
entry.peer = req.p
entry.state = psConnected
addr := &poolEntryAddress{
ip: req.node.IP(),
port: uint16(req.node.TCP()),
lastSeen: mclock.Now(),
}
entry.lastConnected = addr
entry.addr = make(map[string]*poolEntryAddress)
entry.addr[addr.strKey()] = addr
entry.addrSelect = *newWeightedRandomSelect()
entry.addrSelect.update(addr)
req.result <- entry
}
pool.connWg.Add(1)
entry.peer = req.p
entry.state = psConnected
addr := &poolEntryAddress{
ip: req.node.IP(),
port: uint16(req.node.TCP()),
lastSeen: mclock.Now(),
}
entry.lastConnected = addr
entry.addr = make(map[string]*poolEntryAddress)
entry.addr[addr.strKey()] = addr
entry.addrSelect = *newWeightedRandomSelect()
entry.addrSelect.update(addr)
req.result <- entry
case req := <-pool.registerCh:
// Handle peer registration requests.
@ -470,11 +480,42 @@ func (pool *serverPool) loadNodes() {
"response", fmt.Sprintf("%v/%v", time.Duration(e.responseStats.avg), e.responseStats.weight),
"timeout", fmt.Sprintf("%v/%v", e.timeoutStats.avg, e.timeoutStats.weight))
pool.entries[e.node.ID()] = e
pool.knownQueue.setLatest(e)
pool.knownSelect.update((*knownEntry)(e))
if pool.trustedNodes[e.node.ID()] == nil {
pool.knownQueue.setLatest(e)
pool.knownSelect.update((*knownEntry)(e))
}
}
}
// connectToTrustedNodes adds trusted server nodes as static trusted peers.
//
// Note: trusted nodes are not handled by the server pool logic, they are not
// added to either the known or new selection pools. They are connected/reconnected
// by p2p.Server whenever possible.
func (pool *serverPool) connectToTrustedNodes() {
//connect to trusted nodes
for _, node := range pool.trustedNodes {
pool.server.AddTrustedPeer(node)
pool.server.AddPeer(node)
log.Debug("Added trusted node", "id", node.ID().String())
}
}
// parseTrustedNodes returns valid and parsed enodes
func parseTrustedNodes(trustedNodes []string) map[enode.ID]*enode.Node {
nodes := make(map[enode.ID]*enode.Node)
for _, node := range trustedNodes {
node, err := enode.ParseV4(node)
if err != nil {
log.Warn("Trusted node URL invalid", "enode", node, "err", err)
continue
}
nodes[node.ID()] = node
}
return nodes
}
// saveNodes saves known nodes and their statistics into the database. Nodes are
// ordered from least to most recently connected.
func (pool *serverPool) saveNodes() {

2
les/txrelay.go
View File

@ -121,7 +121,7 @@ func (self *LesTxRelay) send(txs types.Transactions, count int) {
return peer.GetRequestCost(SendTxMsg, len(ll))
},
canSend: func(dp distPeer) bool {
return dp.(*peer) == pp
return !dp.(*peer).isOnlyAnnounce && dp.(*peer) == pp
},
request: func(dp distPeer) func() {
peer := dp.(*peer)

39
les/ulc.go Normal file
View File

@ -0,0 +1,39 @@
package les
import (
"fmt"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/p2p/enode"
)
type ulc struct {
trustedKeys map[string]struct{}
minTrustedFraction int
}
func newULC(ulcConfig *eth.ULCConfig) *ulc {
if ulcConfig == nil {
return nil
}
m := make(map[string]struct{}, len(ulcConfig.TrustedServers))
for _, id := range ulcConfig.TrustedServers {
node, err := enode.ParseV4(id)
if err != nil {
fmt.Println("node:", id, " err:", err)
continue
}
m[node.ID().String()] = struct{}{}
}
return &ulc{m, ulcConfig.MinTrustedFraction}
}
func (u *ulc) isTrusted(p enode.ID) bool {
if u.trustedKeys == nil {
return false
}
_, ok := u.trustedKeys[p.String()]
return ok
}

239
les/ulc_test.go Normal file
View File

@ -0,0 +1,239 @@
package les
import (
"fmt"
"reflect"
"testing"
"time"
"net"
"crypto/ecdsa"
"math/big"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/light"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
)
func TestULCSyncWithOnePeer(t *testing.T) {
f := newFullPeerPair(t, 1, 4, testChainGen)
ulcConfig := &eth.ULCConfig{
MinTrustedFraction: 100,
TrustedServers: []string{f.Node.String()},
}
l := newLightPeer(t, ulcConfig)
if reflect.DeepEqual(f.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("blocks are equal")
}
_, _, err := connectPeers(f, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.fetcher.lock.Lock()
l.PM.fetcher.nextRequest()
l.PM.fetcher.lock.Unlock()
if !reflect.DeepEqual(f.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("sync doesn't work")
}
}
func TestULCReceiveAnnounce(t *testing.T) {
f := newFullPeerPair(t, 1, 4, testChainGen)
ulcConfig := &eth.ULCConfig{
MinTrustedFraction: 100,
TrustedServers: []string{f.Node.String()},
}
l := newLightPeer(t, ulcConfig)
fPeer, lPeer, err := connectPeers(f, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.synchronise(fPeer)
//check that the sync is finished correctly
if !reflect.DeepEqual(f.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("sync doesn't work")
}
l.PM.peers.lock.Lock()
if len(l.PM.peers.peers) == 0 {
t.Fatal("peer list should not be empty")
}
l.PM.peers.lock.Unlock()
time.Sleep(time.Second)
//send a signed announce message(payload doesn't matter)
td := f.PM.blockchain.GetTd(l.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Number.Uint64())
announce := announceData{
Number: l.PM.blockchain.CurrentHeader().Number.Uint64() + 1,
Td: td.Add(td, big.NewInt(1)),
}
announce.sign(f.Key)
lPeer.SendAnnounce(announce)
}
func TestULCShouldNotSyncWithTwoPeersOneHaveEmptyChain(t *testing.T) {
f1 := newFullPeerPair(t, 1, 4, testChainGen)
f2 := newFullPeerPair(t, 2, 0, nil)
ulcConf := &ulc{minTrustedFraction: 100, trustedKeys: make(map[string]struct{})}
ulcConf.trustedKeys[f1.Node.ID().String()] = struct{}{}
ulcConf.trustedKeys[f2.Node.ID().String()] = struct{}{}
ulcConfig := &eth.ULCConfig{
MinTrustedFraction: 100,
TrustedServers: []string{f1.Node.String(), f2.Node.String()},
}
l := newLightPeer(t, ulcConfig)
l.PM.ulc.minTrustedFraction = 100
_, _, err := connectPeers(f1, l, 2)
if err != nil {
t.Fatal(err)
}
_, _, err = connectPeers(f2, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.fetcher.lock.Lock()
l.PM.fetcher.nextRequest()
l.PM.fetcher.lock.Unlock()
if reflect.DeepEqual(f2.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("Incorrect hash: second peer has empty chain")
}
}
func TestULCShouldNotSyncWithThreePeersOneHaveEmptyChain(t *testing.T) {
f1 := newFullPeerPair(t, 1, 3, testChainGen)
f2 := newFullPeerPair(t, 2, 4, testChainGen)
f3 := newFullPeerPair(t, 3, 0, nil)
ulcConfig := &eth.ULCConfig{
MinTrustedFraction: 60,
TrustedServers: []string{f1.Node.String(), f2.Node.String(), f3.Node.String()},
}
l := newLightPeer(t, ulcConfig)
_, _, err := connectPeers(f1, l, 2)
if err != nil {
t.Fatal(err)
}
_, _, err = connectPeers(f2, l, 2)
if err != nil {
t.Fatal(err)
}
_, _, err = connectPeers(f3, l, 2)
if err != nil {
t.Fatal(err)
}
l.PM.fetcher.lock.Lock()
l.PM.fetcher.nextRequest()
l.PM.fetcher.lock.Unlock()
if !reflect.DeepEqual(f1.PM.blockchain.CurrentHeader().Hash(), l.PM.blockchain.CurrentHeader().Hash()) {
t.Fatal("Incorrect hash")
}
}
type pairPeer struct {
Name string
Node *enode.Node
PM *ProtocolManager
Key *ecdsa.PrivateKey
}
func connectPeers(full, light pairPeer, version int) (*peer, *peer, error) {
// Create a message pipe to communicate through
app, net := p2p.MsgPipe()
peerLight := full.PM.newPeer(version, NetworkId, p2p.NewPeer(light.Node.ID(), light.Name, nil), net)
peerFull := light.PM.newPeer(version, NetworkId, p2p.NewPeer(full.Node.ID(), full.Name, nil), app)
// Start the peerLight on a new thread
errc1 := make(chan error, 1)
errc2 := make(chan error, 1)
go func() {
select {
case light.PM.newPeerCh <- peerFull:
errc1 <- light.PM.handle(peerFull)
case <-light.PM.quitSync:
errc1 <- p2p.DiscQuitting
}
}()
go func() {
select {
case full.PM.newPeerCh <- peerLight:
errc2 <- full.PM.handle(peerLight)
case <-full.PM.quitSync:
errc2 <- p2p.DiscQuitting
}
}()
select {
case <-time.After(time.Millisecond * 100):
case err := <-errc1:
return nil, nil, fmt.Errorf("peerLight handshake error: %v", err)
case err := <-errc2:
return nil, nil, fmt.Errorf("peerFull handshake error: %v", err)
}
return peerFull, peerLight, nil
}
// newFullPeerPair creates node with full sync mode
func newFullPeerPair(t *testing.T, index int, numberOfblocks int, chainGen func(int, *core.BlockGen)) pairPeer {
db := ethdb.NewMemDatabase()
pmFull := newTestProtocolManagerMust(t, false, numberOfblocks, chainGen, nil, nil, db, nil)
peerPairFull := pairPeer{
Name: "full node",
PM: pmFull,
}
key, err := crypto.GenerateKey()
if err != nil {
t.Fatal("generate key err:", err)
}
peerPairFull.Key = key
peerPairFull.Node = enode.NewV4(&key.PublicKey, net.ParseIP("127.0.0.1"), 35000, 35000)
return peerPairFull
}
// newLightPeer creates node with light sync mode
func newLightPeer(t *testing.T, ulcConfig *eth.ULCConfig) pairPeer {
peers := newPeerSet()
dist := newRequestDistributor(peers, make(chan struct{}))
rm := newRetrieveManager(peers, dist, nil)
ldb := ethdb.NewMemDatabase()
odr := NewLesOdr(ldb, light.DefaultClientIndexerConfig, rm)
pmLight := newTestProtocolManagerMust(t, true, 0, nil, odr, peers, ldb, ulcConfig)
peerPairLight := pairPeer{
Name: "ulc node",
PM: pmLight,
}
key, err := crypto.GenerateKey()
if err != nil {
t.Fatal("generate key err:", err)
}
peerPairLight.Key = key
peerPairLight.Node = enode.NewV4(&key.PublicKey, net.IP{}, 35000, 35000)
return peerPairLight
}

19
light/lightchain.go
View File

@ -70,6 +70,8 @@ type LightChain struct {
wg sync.WaitGroup
engine consensus.Engine
disableCheckFreq bool
}
// NewLightChain returns a fully initialised light chain using information
@ -354,6 +356,9 @@ func (self *LightChain) postChainEvents(events []interface{}) {
// In the case of a light chain, InsertHeaderChain also creates and posts light
// chain events when necessary.
func (self *LightChain) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
if self.disableCheckFreq {
checkFreq = 0
}
start := time.Now()
if i, err := self.hc.ValidateHeaderChain(chain, checkFreq); err != nil {
return i, err
@ -526,3 +531,17 @@ func (self *LightChain) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscri
func (self *LightChain) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
return self.scope.Track(new(event.Feed).Subscribe(ch))
}
//DisableCheckFreq disables header validation. It needs for ULC
func (self *LightChain) DisableCheckFreq() {
self.mu.Lock()
defer self.mu.Unlock()
self.disableCheckFreq = true
}
//EnableCheckFreq enables header validation
func (self *LightChain) EnableCheckFreq() {
self.mu.Lock()
defer self.mu.Unlock()
self.disableCheckFreq = false
}

4
mobile/geth.go
View File

@ -76,6 +76,9 @@ type NodeConfig struct {
// Listening address of pprof server.
PprofAddress string
// Ultra Light client options
ULC *eth.ULCConfig
}
// defaultNodeConfig contains the default node configuration values to use if all
@ -131,6 +134,7 @@ func NewNode(datadir string, config *NodeConfig) (stack *Node, _ error) {
MaxPeers: config.MaxPeers,
},
}
rawStack, err := node.New(nodeConf)
if err != nil {
return nil, err