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Merge branch 'downloader-proto' into develop

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This commit is contained in:
obscuren 2015-04-19 00:09:12 +02:00
commit 71aa5fe8a3
13 changed files with 789 additions and 452 deletions
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6
cmd/geth/main.go
View File

@ -31,6 +31,8 @@ import (
"strconv"
"time"
"path"
"github.com/codegangsta/cli"
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
@ -42,13 +44,12 @@ import (
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/logger"
"github.com/peterh/liner"
"path"
)
import _ "net/http/pprof"
const (
ClientIdentifier = "Geth"
Version = "0.9.9"
Version = "0.9.10"
)
var app = utils.NewApp(Version, "the go-ethereum command line interface")
@ -217,6 +218,7 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
},
}
app.Flags = []cli.Flag{
utils.IdentityFlag,
utils.UnlockedAccountFlag,
utils.PasswordFileFlag,
utils.BootnodesFlag,

9
cmd/utils/flags.go
View File

@ -89,6 +89,10 @@ var (
Usage: "Blockchain version",
Value: core.BlockChainVersion,
}
IdentityFlag = cli.StringFlag{
Name: "identity",
Usage: "node name",
}
// miner settings
MinerThreadsFlag = cli.IntFlag{
@ -242,6 +246,11 @@ func MakeEthConfig(clientID, version string, ctx *cli.Context) *eth.Config {
// Set the log dir
glog.SetLogDir(ctx.GlobalString(LogFileFlag.Name))
customName := ctx.GlobalString(IdentityFlag.Name)
if len(customName) > 0 {
clientID += "/" + customName
}
return &eth.Config{
Name: common.MakeName(clientID, version),
DataDir: ctx.GlobalString(DataDirFlag.Name),

5
core/block_processor.go
View File

@ -323,7 +323,7 @@ func (sm *BlockProcessor) VerifyUncles(statedb *state.StateDB, block, parent *ty
}
uncles.Add(block.Hash())
for _, uncle := range block.Uncles() {
for i, uncle := range block.Uncles() {
if uncles.Has(uncle.Hash()) {
// Error not unique
return UncleError("Uncle not unique")
@ -340,9 +340,8 @@ func (sm *BlockProcessor) VerifyUncles(statedb *state.StateDB, block, parent *ty
}
if err := sm.ValidateHeader(uncle, ancestorHeaders[uncle.ParentHash]); err != nil {
return ValidationError(fmt.Sprintf("%v", err))
return ValidationError(fmt.Sprintf("uncle[%d](%x) header invalid: %v", i, uncle.Hash().Bytes()[:4], err))
}
}
return nil

5
core/chain_manager.go
View File

@ -330,14 +330,13 @@ func (self *ChainManager) GetBlockHashesFromHash(hash common.Hash, max uint64) (
}
// XXX Could be optimised by using a different database which only holds hashes (i.e., linked list)
for i := uint64(0); i < max; i++ {
parentHash := block.Header().ParentHash
block = self.GetBlock(parentHash)
block = self.GetBlock(block.ParentHash())
if block == nil {
break
}
chain = append(chain, block.Hash())
if block.Header().Number.Cmp(common.Big0) <= 0 {
if block.Number().Cmp(common.Big0) <= 0 {
break
}
}

36
eth/backend.go
View File

@ -10,12 +10,12 @@ import (
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/blockpool"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
@ -130,15 +130,16 @@ type Ethereum struct {
blockProcessor *core.BlockProcessor
txPool *core.TxPool
chainManager *core.ChainManager
blockPool *blockpool.BlockPool
accountManager *accounts.Manager
whisper *whisper.Whisper
pow *ethash.Ethash
protocolManager *ProtocolManager
downloader *downloader.Downloader
net *p2p.Server
eventMux *event.TypeMux
txSub event.Subscription
blockSub event.Subscription
minedBlockSub event.Subscription
miner *miner.Miner
// logger logger.LogSystem
@ -208,6 +209,7 @@ func New(config *Config) (*Ethereum, error) {
}
eth.chainManager = core.NewChainManager(blockDb, stateDb, eth.EventMux())
eth.downloader = downloader.New(eth.chainManager.HasBlock, eth.chainManager.InsertChain, eth.chainManager.Td)
eth.pow = ethash.New(eth.chainManager)
eth.txPool = core.NewTxPool(eth.EventMux(), eth.chainManager.State)
eth.blockProcessor = core.NewBlockProcessor(stateDb, extraDb, eth.pow, eth.txPool, eth.chainManager, eth.EventMux())
@ -215,19 +217,14 @@ func New(config *Config) (*Ethereum, error) {
eth.whisper = whisper.New()
eth.shhVersionId = int(eth.whisper.Version())
eth.miner = miner.New(eth, eth.pow, config.MinerThreads)
hasBlock := eth.chainManager.HasBlock
insertChain := eth.chainManager.InsertChain
td := eth.chainManager.Td()
eth.blockPool = blockpool.New(hasBlock, insertChain, eth.pow.Verify, eth.EventMux(), td)
eth.protocolManager = NewProtocolManager(config.ProtocolVersion, config.NetworkId, eth.txPool, eth.chainManager, eth.downloader)
netprv, err := config.nodeKey()
if err != nil {
return nil, err
}
ethProto := EthProtocol(config.ProtocolVersion, config.NetworkId, eth.txPool, eth.chainManager, eth.blockPool)
protocols := []p2p.Protocol{ethProto}
protocols := []p2p.Protocol{eth.protocolManager.SubProtocol}
if config.Shh {
protocols = append(protocols, eth.whisper.Protocol())
}
@ -349,7 +346,6 @@ func (s *Ethereum) AccountManager() *accounts.Manager { return s.accountManag
func (s *Ethereum) ChainManager() *core.ChainManager { return s.chainManager }
func (s *Ethereum) BlockProcessor() *core.BlockProcessor { return s.blockProcessor }
func (s *Ethereum) TxPool() *core.TxPool { return s.txPool }
func (s *Ethereum) BlockPool() *blockpool.BlockPool { return s.blockPool }
func (s *Ethereum) Whisper() *whisper.Whisper { return s.whisper }
func (s *Ethereum) EventMux() *event.TypeMux { return s.eventMux }
func (s *Ethereum) BlockDb() common.Database { return s.blockDb }
@ -363,6 +359,7 @@ func (s *Ethereum) ClientVersion() string { return s.clientVersio
func (s *Ethereum) EthVersion() int { return s.ethVersionId }
func (s *Ethereum) NetVersion() int { return s.netVersionId }
func (s *Ethereum) ShhVersion() int { return s.shhVersionId }
func (s *Ethereum) Downloader() *downloader.Downloader { return s.downloader }
// Start the ethereum
func (s *Ethereum) Start() error {
@ -380,7 +377,6 @@ func (s *Ethereum) Start() error {
// Start services
s.txPool.Start()
s.blockPool.Start()
if s.whisper != nil {
s.whisper.Start()
@ -391,8 +387,8 @@ func (s *Ethereum) Start() error {
go s.txBroadcastLoop()
// broadcast mined blocks
s.blockSub = s.eventMux.Subscribe(core.ChainHeadEvent{})
go s.blockBroadcastLoop()
s.minedBlockSub = s.eventMux.Subscribe(core.NewMinedBlockEvent{})
go s.minedBroadcastLoop()
glog.V(logger.Info).Infoln("Server started")
return nil
@ -406,7 +402,6 @@ func (s *Ethereum) StartForTest() {
// Start services
s.txPool.Start()
s.blockPool.Start()
}
func (self *Ethereum) SuggestPeer(nodeURL string) error {
@ -425,11 +420,10 @@ func (s *Ethereum) Stop() {
defer s.extraDb.Close()
s.txSub.Unsubscribe() // quits txBroadcastLoop
s.blockSub.Unsubscribe() // quits blockBroadcastLoop
s.minedBlockSub.Unsubscribe() // quits blockBroadcastLoop
s.txPool.Stop()
s.eventMux.Stop()
s.blockPool.Stop()
if s.whisper != nil {
s.whisper.Stop()
}
@ -468,12 +462,12 @@ func (self *Ethereum) syncAccounts(tx *types.Transaction) {
}
}
func (self *Ethereum) blockBroadcastLoop() {
func (self *Ethereum) minedBroadcastLoop() {
// automatically stops if unsubscribe
for obj := range self.blockSub.Chan() {
for obj := range self.minedBlockSub.Chan() {
switch ev := obj.(type) {
case core.ChainHeadEvent:
self.net.BroadcastLimited("eth", NewBlockMsg, math.Sqrt, []interface{}{ev.Block, ev.Block.Td})
case core.NewMinedBlockEvent:
self.protocolManager.BroadcastBlock(ev.Block.Hash(), ev.Block)
}
}
}

179
eth/downloader/downloader.go
View File

@ -1,6 +1,8 @@
package downloader
import (
"errors"
"fmt"
"math"
"math/big"
"sync"
@ -17,7 +19,20 @@ import (
const (
maxBlockFetch = 256 // Amount of max blocks to be fetched per chunk
minDesiredPeerCount = 3 // Amount of peers desired to start syncing
minDesiredPeerCount = 5 // Amount of peers desired to start syncing
peerCountTimeout = 12 * time.Second // Amount of time it takes for the peer handler to ignore minDesiredPeerCount
blockTtl = 15 * time.Second // The amount of time it takes for a block request to time out
hashTtl = 20 * time.Second // The amount of time it takes for a hash request to time out
)
var (
errLowTd = errors.New("peer's TD is too low")
errBusy = errors.New("busy")
errUnknownPeer = errors.New("peer's unknown or unhealthy")
errBadPeer = errors.New("action from bad peer ignored")
errTimeout = errors.New("timeout")
errEmptyHashSet = errors.New("empty hash set by peer")
errPeersUnavailable = errors.New("no peers available or all peers tried for block download process")
)
type hashCheckFn func(common.Hash) bool
@ -29,6 +44,7 @@ type Downloader struct {
mu sync.RWMutex
queue *queue
peers peers
activePeer string
// Callbacks
hasBlock hashCheckFn
@ -43,7 +59,7 @@ type Downloader struct {
// Channels
newPeerCh chan *peer
syncCh chan syncPack
HashCh chan []common.Hash
hashCh chan []common.Hash
blockCh chan blockPack
quit chan struct{}
}
@ -68,7 +84,7 @@ func New(hasBlock hashCheckFn, insertChain chainInsertFn, currentTd currentTdFn)
currentTd: currentTd,
newPeerCh: make(chan *peer, 1),
syncCh: make(chan syncPack, 1),
HashCh: make(chan []common.Hash, 1),
hashCh: make(chan []common.Hash, 1),
blockCh: make(chan blockPack, 1),
quit: make(chan struct{}),
}
@ -82,7 +98,7 @@ func (d *Downloader) RegisterPeer(id string, td *big.Int, hash common.Hash, getH
d.mu.Lock()
defer d.mu.Unlock()
glog.V(logger.Detail).Infoln("Register peer", id)
glog.V(logger.Detail).Infoln("Register peer", id, "TD =", td)
// Create a new peer and add it to the list of known peers
peer := newPeer(id, td, hash, getHashes, getBlocks)
@ -94,6 +110,7 @@ func (d *Downloader) RegisterPeer(id string, td *big.Int, hash common.Hash, getH
return nil
}
// UnregisterPeer unregister's a peer. This will prevent any action from the specified peer.
func (d *Downloader) UnregisterPeer(id string) {
d.mu.Lock()
defer d.mu.Unlock()
@ -105,8 +122,7 @@ func (d *Downloader) UnregisterPeer(id string) {
func (d *Downloader) peerHandler() {
// itimer is used to determine when to start ignoring `minDesiredPeerCount`
//itimer := time.NewTicker(5 * time.Second)
itimer := time.NewTimer(5 * time.Second)
itimer := time.NewTimer(peerCountTimeout)
out:
for {
select {
@ -116,11 +132,18 @@ out:
if len(d.peers) < minDesiredPeerCount {
break
}
d.selectPeer(d.peers.bestPeer())
case <-itimer.C:
// The timer will make sure that the downloader keeps an active state
// in which it attempts to always check the network for highest td peers
// Either select the peer or restart the timer if no peers could
// be selected.
if peer := d.peers.bestPeer(); peer != nil {
d.selectPeer(d.peers.bestPeer())
} else {
itimer.Reset(5 * time.Second)
}
case <-d.quit:
break out
}
@ -131,7 +154,7 @@ func (d *Downloader) selectPeer(p *peer) {
// Make sure it's doing neither. Once done we can restart the
// downloading process if the TD is higher. For now just get on
// with whatever is going on. This prevents unecessary switching.
if !(d.isFetchingHashes() || d.isDownloadingBlocks() || d.isProcessing()) {
if !d.isBusy() {
// selected peer must be better than our own
// XXX we also check the peer's recent hash to make sure we
// don't have it. Some peers report (i think) incorrect TD.
@ -142,6 +165,7 @@ func (d *Downloader) selectPeer(p *peer) {
glog.V(logger.Detail).Infoln("New peer with highest TD =", p.td)
d.syncCh <- syncPack{p, p.recentHash, false}
}
}
func (d *Downloader) update() {
@ -149,30 +173,13 @@ out:
for {
select {
case sync := <-d.syncCh:
selectedPeer := sync.peer
glog.V(logger.Detail).Infoln("Synchronising with network using:", selectedPeer.id)
// Start the fetcher. This will block the update entirely
// interupts need to be send to the appropriate channels
// respectively.
if err := d.startFetchingHashes(selectedPeer, sync.hash, sync.ignoreInitial); err != nil {
// handle error
glog.V(logger.Debug).Infoln("Error fetching hashes:", err)
// XXX Reset
var peer *peer = sync.peer
err := d.getFromPeer(peer, sync.hash, sync.ignoreInitial)
if err != nil {
glog.V(logger.Detail).Infoln(err)
break
}
// Start fetching blocks in paralel. The strategy is simple
// take any available peers, seserve a chunk for each peer available,
// let the peer deliver the chunkn and periodically check if a peer
// has timedout. When done downloading, process blocks.
if err := d.startFetchingBlocks(selectedPeer); err != nil {
glog.V(logger.Debug).Infoln("Error downloading blocks:", err)
// XXX reset
break
}
glog.V(logger.Detail).Infoln("Sync completed")
d.process()
case <-d.quit:
break out
@ -182,6 +189,9 @@ out:
// XXX Make synchronous
func (d *Downloader) startFetchingHashes(p *peer, hash common.Hash, ignoreInitial bool) error {
atomic.StoreInt32(&d.fetchingHashes, 1)
defer atomic.StoreInt32(&d.fetchingHashes, 0)
glog.V(logger.Debug).Infof("Downloading hashes (%x) from %s", hash.Bytes()[:4], p.id)
start := time.Now()
@ -192,15 +202,15 @@ func (d *Downloader) startFetchingHashes(p *peer, hash common.Hash, ignoreInitia
// Add the hash to the queue first
d.queue.hashPool.Add(hash)
}
// Get the first batch of hashes
p.getHashes(hash)
atomic.StoreInt32(&d.fetchingHashes, 1)
failureResponse := time.NewTimer(hashTtl)
out:
for {
select {
case hashes := <-d.HashCh:
case hashes := <-d.hashCh:
var done bool // determines whether we're done fetching hashes (i.e. common hash found)
hashSet := set.New()
for _, hash := range hashes {
@ -216,26 +226,36 @@ out:
d.queue.put(hashSet)
// Add hashes to the chunk set
// Check if we're done fetching
if !done && len(hashes) > 0 {
//fmt.Println("re-fetch. current =", d.queue.hashPool.Size())
if len(hashes) == 0 { // Make sure the peer actually gave you something valid
glog.V(logger.Debug).Infof("Peer (%s) responded with empty hash set\n", p.id)
d.queue.reset()
return errEmptyHashSet
} else if !done { // Check if we're done fetching
// Get the next set of hashes
p.getHashes(hashes[len(hashes)-1])
atomic.StoreInt32(&d.fetchingHashes, 1)
} else {
atomic.StoreInt32(&d.fetchingHashes, 0)
} else { // we're done
break out
}
case <-failureResponse.C:
glog.V(logger.Debug).Infof("Peer (%s) didn't respond in time for hash request\n", p.id)
// TODO instead of reseting the queue select a new peer from which we can start downloading hashes.
// 1. check for peer's best hash to be included in the current hash set;
// 2. resume from last point (hashes[len(hashes)-1]) using the newly selected peer.
d.queue.reset()
return errTimeout
}
}
glog.V(logger.Detail).Infof("Downloaded hashes (%d). Took %v\n", d.queue.hashPool.Size(), time.Since(start))
glog.V(logger.Detail).Infof("Downloaded hashes (%d) in %v\n", d.queue.hashPool.Size(), time.Since(start))
return nil
}
func (d *Downloader) startFetchingBlocks(p *peer) error {
glog.V(logger.Detail).Infoln("Downloading", d.queue.hashPool.Size(), "blocks")
glog.V(logger.Detail).Infoln("Downloading", d.queue.hashPool.Size(), "block(s)")
atomic.StoreInt32(&d.downloadingBlocks, 1)
defer atomic.StoreInt32(&d.downloadingBlocks, 0)
start := time.Now()
@ -245,18 +265,18 @@ out:
for {
select {
case blockPack := <-d.blockCh:
// If the peer was previously banned and failed to deliver it's pack
// in a reasonable time frame, ignore it's message.
if d.peers[blockPack.peerId] != nil {
d.peers[blockPack.peerId].promote()
d.queue.deliver(blockPack.peerId, blockPack.blocks)
d.peers.setState(blockPack.peerId, idleState)
}
case <-ticker.C:
// If there are unrequested hashes left start fetching
// from the available peers.
if d.queue.hashPool.Size() > 0 {
availablePeers := d.peers.get(idleState)
if len(availablePeers) == 0 {
glog.V(logger.Detail).Infoln("No peers available out of", len(d.peers))
}
for _, peer := range availablePeers {
// Get a possible chunk. If nil is returned no chunk
// could be returned due to no hashes available.
@ -265,7 +285,6 @@ out:
continue
}
//fmt.Println("fetching for", peer.id)
// XXX make fetch blocking.
// Fetch the chunk and check for error. If the peer was somehow
// already fetching a chunk due to a bug, it will be returned to
@ -276,13 +295,20 @@ out:
d.queue.put(chunk.hashes)
}
}
atomic.StoreInt32(&d.downloadingBlocks, 1)
// make sure that we have peers available for fetching. If all peers have been tried
// and all failed throw an error
if len(d.queue.fetching) == 0 {
d.queue.reset()
d.peers.reset()
return fmt.Errorf("%v avaialable = %d. total = %d", errPeersUnavailable, len(availablePeers), len(d.peers))
}
} else if len(d.queue.fetching) == 0 {
// When there are no more queue and no more `fetching`. We can
// safely assume we're done. Another part of the process will check
// for parent errors and will re-request anything that's missing
atomic.StoreInt32(&d.downloadingBlocks, 0)
// Break out so that we can process with processing blocks
break out
} else {
// Check for bad peers. Bad peers may indicate a peer not responding
@ -293,10 +319,10 @@ out:
d.queue.mu.Lock()
var badPeers []string
for pid, chunk := range d.queue.fetching {
if time.Since(chunk.itime) > 5*time.Second {
if time.Since(chunk.itime) > blockTtl {
badPeers = append(badPeers, pid)
// remove peer as good peer from peer list
d.UnregisterPeer(pid)
//d.UnregisterPeer(pid)
}
}
d.queue.mu.Unlock()
@ -313,26 +339,42 @@ out:
d.queue.deliver(pid, nil)
if peer := d.peers[pid]; peer != nil {
peer.demote()
peer.reset()
}
}
}
//fmt.Println(d.queue.hashPool.Size(), len(d.queue.fetching))
}
}
glog.V(logger.Detail).Infoln("Download blocks: done. Took", time.Since(start))
glog.V(logger.Detail).Infoln("Downloaded block(s) in", time.Since(start))
return nil
}
func (d *Downloader) AddHashes(id string, hashes []common.Hash) error {
// make sure that the hashes that are being added are actually from the peer
// that's the current active peer. hashes that have been received from other
// peers are dropped and ignored.
if d.activePeer != id {
return fmt.Errorf("received hashes from %s while active peer is %s", id, d.activePeer)
}
d.hashCh <- hashes
return nil
}
// Add an (unrequested) block to the downloader. This is usually done through the
// NewBlockMsg by the protocol handler.
func (d *Downloader) AddBlock(id string, block *types.Block, td *big.Int) {
// Adding blocks is done synchronously. if there are missing blocks, blocks will be
// fetched first. If the downloader is busy or if some other processed failed an error
// will be returned.
func (d *Downloader) AddBlock(id string, block *types.Block, td *big.Int) error {
hash := block.Hash()
if d.hasBlock(hash) {
return
return fmt.Errorf("known block %x", hash.Bytes()[:4])
}
peer := d.peers.getPeer(id)
@ -340,7 +382,7 @@ func (d *Downloader) AddBlock(id string, block *types.Block, td *big.Int) {
// and add the block. Otherwise just ignore it
if peer == nil {
glog.V(logger.Detail).Infof("Ignored block from bad peer %s\n", id)
return
return errBadPeer
}
peer.mu.Lock()
@ -353,17 +395,24 @@ func (d *Downloader) AddBlock(id string, block *types.Block, td *big.Int) {
d.queue.addBlock(id, block, td)
// if neither go ahead to process
if !(d.isFetchingHashes() || d.isDownloadingBlocks()) {
if d.isBusy() {
return errBusy
}
// Check if the parent of the received block is known.
// If the block is not know, request it otherwise, request.
phash := block.ParentHash()
if !d.hasBlock(phash) {
glog.V(logger.Detail).Infof("Missing parent %x, requires fetching\n", phash.Bytes()[:4])
d.syncCh <- syncPack{peer, peer.recentHash, true}
} else {
d.process()
// Get the missing hashes from the peer (synchronously)
err := d.getFromPeer(peer, peer.recentHash, true)
if err != nil {
return err
}
}
return d.process()
}
// Deliver a chunk to the downloader. This is usually done through the BlocksMsg by
@ -383,8 +432,11 @@ func (d *Downloader) process() error {
// to a seperate goroutine where it periodically checks for linked pieces.
types.BlockBy(types.Number).Sort(d.queue.blocks)
blocks := d.queue.blocks
if len(blocks) == 0 {
return nil
}
glog.V(logger.Debug).Infoln("Inserting chain with", len(blocks), "blocks")
glog.V(logger.Debug).Infof("Inserting chain with %d blocks (#%v - #%v)\n", len(blocks), blocks[0].Number(), blocks[len(blocks)-1].Number())
var err error
// Loop untill we're out of blocks
@ -408,6 +460,11 @@ func (d *Downloader) process() error {
}
}
break
} else if err != nil {
// Reset chain completely. This needs much, much improvement.
// instead: check all blocks leading down to this block false block and remove it
blocks = nil
break
}
blocks = blocks[max:]
}
@ -432,3 +489,7 @@ func (d *Downloader) isDownloadingBlocks() bool {
func (d *Downloader) isProcessing() bool {
return atomic.LoadInt32(&d.processingBlocks) == 1
}
func (d *Downloader) isBusy() bool {
return d.isFetchingHashes() || d.isDownloadingBlocks() || d.isProcessing()
}

25
eth/downloader/peer.go
View File

@ -6,6 +6,7 @@ import (
"sync"
"github.com/ethereum/go-ethereum/common"
"gopkg.in/fatih/set.v0"
)
const (
@ -19,6 +20,12 @@ type blockFetcherFn func([]common.Hash) error
// XXX make threadsafe!!!!
type peers map[string]*peer
func (p peers) reset() {
for _, peer := range p {
peer.reset()
}
}
func (p peers) get(state int) []*peer {
var peers []*peer
for _, peer := range p {
@ -64,13 +71,23 @@ type peer struct {
td *big.Int
recentHash common.Hash
requested *set.Set
getHashes hashFetcherFn
getBlocks blockFetcherFn
}
// create a new peer
func newPeer(id string, td *big.Int, hash common.Hash, getHashes hashFetcherFn, getBlocks blockFetcherFn) *peer {
return &peer{id: id, td: td, recentHash: hash, getHashes: getHashes, getBlocks: getBlocks, state: idleState}
return &peer{
id: id,
td: td,
recentHash: hash,
getHashes: getHashes,
getBlocks: getBlocks,
state: idleState,
requested: set.New(),
}
}
// fetch a chunk using the peer
@ -82,6 +99,8 @@ func (p *peer) fetch(chunk *chunk) error {
return errors.New("peer already fetching chunk")
}
p.requested.Merge(chunk.hashes)
// set working state
p.state = workingState
// convert the set to a fetchable slice
@ -115,3 +134,7 @@ func (p *peer) demote() {
p.rep = 0
}
}
func (p *peer) reset() {
p.state = idleState
}

19
eth/downloader/queue.go
View File

@ -31,6 +31,17 @@ func newqueue() *queue {
}
}
func (c *queue) reset() {
c.mu.Lock()
defer c.mu.Unlock()
c.hashPool.Clear()
c.fetchPool.Clear()
c.blockHashes.Clear()
c.blocks = nil
c.fetching = make(map[string]*chunk)
}
// reserve a `max` set of hashes for `p` peer.
func (c *queue) get(p *peer, max int) *chunk {
c.mu.Lock()
@ -49,11 +60,19 @@ func (c *queue) get(p *peer, max int) *chunk {
return false
}
// Skip any hashes that have previously been requested from the peer
if !p.requested.Has(v) {
hashes.Add(v)
i++
}
return true
})
// if no hashes can be requested return a nil chunk
if hashes.Size() == 0 {
return nil
}
// remove the fetchable hashes from hash pool
c.hashPool.Separate(hashes)
c.fetchPool.Merge(hashes)

79
eth/downloader/synchronous.go Normal file
View File

@ -0,0 +1,79 @@
package downloader
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
)
// THIS IS PENDING AND TO DO CHANGES FOR MAKING THE DOWNLOADER SYNCHRONOUS
// SynchroniseWithPeer will select the peer and use it for synchronising. If an empty string is given
// it will use the best peer possible and synchronise if it's TD is higher than our own. If any of the
// checks fail an error will be returned. This method is synchronous
func (d *Downloader) SynchroniseWithPeer(id string) (types.Blocks, error) {
// Check if we're busy
if d.isBusy() {
return nil, errBusy
}
// Attempt to select a peer. This can either be nothing, which returns, best peer
// or selected peer. If no peer could be found an error will be returned
var p *peer
if len(id) == 0 {
p = d.peers[id]
if p == nil {
return nil, errUnknownPeer
}
} else {
p = d.peers.bestPeer()
}
// Make sure our td is lower than the peer's td
if p.td.Cmp(d.currentTd()) <= 0 || d.hasBlock(p.recentHash) {
return nil, errLowTd
}
// Get the hash from the peer and initiate the downloading progress.
err := d.getFromPeer(p, p.recentHash, false)
if err != nil {
return nil, err
}
return d.queue.blocks, nil
}
// Synchronise will synchronise using the best peer.
func (d *Downloader) Synchronise() (types.Blocks, error) {
return d.SynchroniseWithPeer("")
}
func (d *Downloader) getFromPeer(p *peer, hash common.Hash, ignoreInitial bool) error {
d.activePeer = p.id
glog.V(logger.Detail).Infoln("Synchronising with the network using:", p.id)
// Start the fetcher. This will block the update entirely
// interupts need to be send to the appropriate channels
// respectively.
if err := d.startFetchingHashes(p, hash, ignoreInitial); err != nil {
// handle error
glog.V(logger.Debug).Infoln("Error fetching hashes:", err)
// XXX Reset
return err
}
// Start fetching blocks in paralel. The strategy is simple
// take any available peers, seserve a chunk for each peer available,
// let the peer deliver the chunkn and periodically check if a peer
// has timedout. When done downloading, process blocks.
if err := d.startFetchingBlocks(p); err != nil {
glog.V(logger.Debug).Infoln("Error downloading blocks:", err)
// XXX reset
return err
}
glog.V(logger.Detail).Infoln("Sync completed")
return nil
}

334
eth/handler.go Normal file
View File

@ -0,0 +1,334 @@
package eth
// XXX Fair warning, most of the code is re-used from the old protocol. Please be aware that most of this will actually change
// The idea is that most of the calls within the protocol will become synchronous.
// Block downloading and block processing will be complete seperate processes
/*
# Possible scenarios
// Synching scenario
// Use the best peer to synchronise
blocks, err := pm.downloader.Synchronise()
if err != nil {
// handle
break
}
pm.chainman.InsertChain(blocks)
// Receiving block with known parent
if parent_exist {
if err := pm.chainman.InsertChain(block); err != nil {
// handle
break
}
pm.BroadcastBlock(block)
}
// Receiving block with unknown parent
blocks, err := pm.downloader.SynchroniseWithPeer(peer)
if err != nil {
// handle
break
}
pm.chainman.InsertChain(blocks)
*/
import (
"fmt"
"math"
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
)
func errResp(code errCode, format string, v ...interface{}) error {
return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
}
type hashFetcherFn func(common.Hash) error
type blockFetcherFn func([]common.Hash) error
// extProt is an interface which is passed around so we can expose GetHashes and GetBlock without exposing it to the rest of the protocol
// extProt is passed around to peers which require to GetHashes and GetBlocks
type extProt struct {
getHashes hashFetcherFn
getBlocks blockFetcherFn
}
func (ep extProt) GetHashes(hash common.Hash) error { return ep.getHashes(hash) }
func (ep extProt) GetBlock(hashes []common.Hash) error { return ep.getBlocks(hashes) }
type ProtocolManager struct {
protVer, netId int
txpool txPool
chainman *core.ChainManager
downloader *downloader.Downloader
pmu sync.Mutex
peers map[string]*peer
SubProtocol p2p.Protocol
}
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
// with the ethereum network.
func NewProtocolManager(protocolVersion, networkId int, txpool txPool, chainman *core.ChainManager, downloader *downloader.Downloader) *ProtocolManager {
manager := &ProtocolManager{
txpool: txpool,
chainman: chainman,
downloader: downloader,
peers: make(map[string]*peer),
}
manager.SubProtocol = p2p.Protocol{
Name: "eth",
Version: uint(protocolVersion),
Length: ProtocolLength,
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
peer := manager.newPeer(protocolVersion, networkId, p, rw)
err := manager.handle(peer)
//glog.V(logger.Detail).Infof("[%s]: %v\n", peer.id, err)
return err
},
}
return manager
}
func (pm *ProtocolManager) newPeer(pv, nv int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
td, current, genesis := pm.chainman.Status()
return newPeer(pv, nv, genesis, current, td, p, rw)
}
func (pm *ProtocolManager) handle(p *peer) error {
if err := p.handleStatus(); err != nil {
return err
}
pm.pmu.Lock()
pm.peers[p.id] = p
pm.pmu.Unlock()
pm.downloader.RegisterPeer(p.id, p.td, p.currentHash, p.requestHashes, p.requestBlocks)
defer func() {
pm.pmu.Lock()
defer pm.pmu.Unlock()
delete(pm.peers, p.id)
pm.downloader.UnregisterPeer(p.id)
}()
// propagate existing transactions. new transactions appearing
// after this will be sent via broadcasts.
if err := p.sendTransactions(pm.txpool.GetTransactions()); err != nil {
return err
}
// main loop. handle incoming messages.
for {
if err := pm.handleMsg(p); err != nil {
return err
}
}
return nil
}
func (self *ProtocolManager) handleMsg(p *peer) error {
msg, err := p.rw.ReadMsg()
if err != nil {
return err
}
if msg.Size > ProtocolMaxMsgSize {
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
// make sure that the payload has been fully consumed
defer msg.Discard()
switch msg.Code {
case GetTxMsg: // ignore
case StatusMsg:
return errResp(ErrExtraStatusMsg, "uncontrolled status message")
case TxMsg:
// TODO: rework using lazy RLP stream
var txs []*types.Transaction
if err := msg.Decode(&txs); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
for i, tx := range txs {
if tx == nil {
return errResp(ErrDecode, "transaction %d is nil", i)
}
jsonlogger.LogJson(&logger.EthTxReceived{
TxHash: tx.Hash().Hex(),
RemoteId: p.ID().String(),
})
}
self.txpool.AddTransactions(txs)
case GetBlockHashesMsg:
var request getBlockHashesMsgData
if err := msg.Decode(&request); err != nil {
return errResp(ErrDecode, "->msg %v: %v", msg, err)
}
if request.Amount > maxHashes {
request.Amount = maxHashes
}
hashes := self.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
if glog.V(logger.Debug) {
if len(hashes) == 0 {
glog.Infof("invalid block hash %x", request.Hash.Bytes()[:4])
}
}
// returns either requested hashes or nothing (i.e. not found)
return p.sendBlockHashes(hashes)
case BlockHashesMsg:
msgStream := rlp.NewStream(msg.Payload)
var hashes []common.Hash
if err := msgStream.Decode(&hashes); err != nil {
break
}
err := self.downloader.AddHashes(p.id, hashes)
if err != nil {
glog.V(logger.Debug).Infoln(err)
}
case GetBlocksMsg:
msgStream := rlp.NewStream(msg.Payload)
if _, err := msgStream.List(); err != nil {
return err
}
var blocks []*types.Block
var i int
for {
i++
var hash common.Hash
err := msgStream.Decode(&hash)
if err == rlp.EOL {
break
} else if err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
block := self.chainman.GetBlock(hash)
if block != nil {
blocks = append(blocks, block)
}
if i == maxBlocks {
break
}
}
return p.sendBlocks(blocks)
case BlocksMsg:
msgStream := rlp.NewStream(msg.Payload)
var blocks []*types.Block
if err := msgStream.Decode(&blocks); err != nil {
glog.V(logger.Detail).Infoln("Decode error", err)
blocks = nil
}
self.downloader.DeliverChunk(p.id, blocks)
case NewBlockMsg:
var request newBlockMsgData
if err := msg.Decode(&request); err != nil {
return errResp(ErrDecode, "%v: %v", msg, err)
}
if err := request.Block.ValidateFields(); err != nil {
return errResp(ErrDecode, "block validation %v: %v", msg, err)
}
hash := request.Block.Hash()
// Add the block hash as a known hash to the peer. This will later be used to detirmine
// who should receive this.
p.blockHashes.Add(hash)
_, chainHead, _ := self.chainman.Status()
jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
BlockHash: hash.Hex(),
BlockNumber: request.Block.Number(), // this surely must be zero
ChainHeadHash: chainHead.Hex(),
BlockPrevHash: request.Block.ParentHash().Hex(),
RemoteId: p.ID().String(),
})
// Make sure the block isn't already known. If this is the case simply drop
// the message and move on. If the TD is < currentTd; drop it as well. If this
// chain at some point becomes canonical, the downloader will fetch it.
if self.chainman.HasBlock(hash) {
break
}
/* XXX unsure about this
if self.chainman.Td().Cmp(request.TD) > 0 && new(big.Int).Add(request.Block.Number(), big.NewInt(7)).Cmp(self.chainman.CurrentBlock().Number()) < 0 {
glog.V(logger.Debug).Infoln("dropped block", request.Block.Number(), "due to low TD", request.TD)
break
}
*/
// Attempt to insert the newly received by checking if the parent exists.
// if the parent exists we process the block and propagate to our peers
// if the parent does not exists we delegate to the downloader.
// NOTE we can reduce chatter by dropping blocks with Td < currentTd
if self.chainman.HasBlock(request.Block.ParentHash()) {
if err := self.chainman.InsertChain(types.Blocks{request.Block}); err != nil {
// handle error
return nil
}
self.BroadcastBlock(hash, request.Block)
//fmt.Println(request.Block.Hash().Hex(), "our calculated TD =", request.Block.Td, "their TD =", request.TD)
} else {
// adding blocks is synchronous
go func() {
err := self.downloader.AddBlock(p.id, request.Block, request.TD)
if err != nil {
glog.V(logger.Detail).Infoln("downloader err:", err)
return
}
self.BroadcastBlock(hash, request.Block)
//fmt.Println(request.Block.Hash().Hex(), "our calculated TD =", request.Block.Td, "their TD =", request.TD)
}()
}
default:
return errResp(ErrInvalidMsgCode, "%v", msg.Code)
}
return nil
}
// BroadcastBlock will propagate the block to its connected peers. It will sort
// out which peers do not contain the block in their block set and will do a
// sqrt(peers) to determine the amount of peers we broadcast to.
func (pm *ProtocolManager) BroadcastBlock(hash common.Hash, block *types.Block) {
pm.pmu.Lock()
defer pm.pmu.Unlock()
// Find peers who don't know anything about the given hash. Peers that
// don't know about the hash will be a candidate for the broadcast loop
var peers []*peer
for _, peer := range pm.peers {
if !peer.blockHashes.Has(hash) {
peers = append(peers, peer)
}
}
// Broadcast block to peer set
peers = peers[:int(math.Sqrt(float64(len(peers))))]
for _, peer := range peers {
peer.sendNewBlock(block)
}
glog.V(logger.Detail).Infoln("broadcast block to", len(peers), "peers")
}

143
eth/peer.go Normal file
View File

@ -0,0 +1,143 @@
package eth
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/p2p"
"gopkg.in/fatih/set.v0"
)
type statusMsgData struct {
ProtocolVersion uint32
NetworkId uint32
TD *big.Int
CurrentBlock common.Hash
GenesisBlock common.Hash
}
type getBlockHashesMsgData struct {
Hash common.Hash
Amount uint64
}
type peer struct {
*p2p.Peer
rw p2p.MsgReadWriter
protv, netid int
currentHash common.Hash
id string
td *big.Int
genesis, ourHash common.Hash
ourTd *big.Int
txHashes *set.Set
blockHashes *set.Set
}
func newPeer(protv, netid int, genesis, currentHash common.Hash, td *big.Int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
id := p.ID()
return &peer{
Peer: p,
rw: rw,
genesis: genesis,
ourHash: currentHash,
ourTd: td,
protv: protv,
netid: netid,
id: fmt.Sprintf("%x", id[:8]),
txHashes: set.New(),
blockHashes: set.New(),
}
}
// sendTransactions sends transactions to the peer and includes the hashes
// in it's tx hash set for future reference. The tx hash will allow the
// manager to check whether the peer has already received this particular
// transaction
func (p *peer) sendTransactions(txs types.Transactions) error {
for _, tx := range txs {
p.txHashes.Add(tx.Hash())
}
return p2p.Send(p.rw, TxMsg, txs)
}
func (p *peer) sendBlockHashes(hashes []common.Hash) error {
return p2p.Send(p.rw, BlockHashesMsg, hashes)
}
func (p *peer) sendBlocks(blocks []*types.Block) error {
return p2p.Send(p.rw, BlocksMsg, blocks)
}
func (p *peer) sendNewBlock(block *types.Block) error {
p.blockHashes.Add(block.Hash())
return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, block.Td})
}
func (p *peer) requestHashes(from common.Hash) error {
p.Debugf("fetching hashes (%d) %x...\n", maxHashes, from[0:4])
return p2p.Send(p.rw, GetBlockHashesMsg, getBlockHashesMsgData{from, maxHashes})
}
func (p *peer) requestBlocks(hashes []common.Hash) error {
p.Debugf("fetching %v blocks", len(hashes))
return p2p.Send(p.rw, GetBlocksMsg, hashes)
}
func (p *peer) handleStatus() error {
errc := make(chan error, 1)
go func() {
errc <- p2p.Send(p.rw, StatusMsg, &statusMsgData{
ProtocolVersion: uint32(p.protv),
NetworkId: uint32(p.netid),
TD: p.ourTd,
CurrentBlock: p.ourHash,
GenesisBlock: p.genesis,
})
}()
// read and handle remote status
msg, err := p.rw.ReadMsg()
if err != nil {
return err
}
if msg.Code != StatusMsg {
return errResp(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
}
if msg.Size > ProtocolMaxMsgSize {
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
var status statusMsgData
if err := msg.Decode(&status); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
if status.GenesisBlock != p.genesis {
return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, p.genesis)
}
if int(status.NetworkId) != p.netid {
return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, p.netid)
}
if int(status.ProtocolVersion) != p.protv {
return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.protv)
}
// Set the total difficulty of the peer
p.td = status.TD
// set the best hash of the peer
p.currentHash = status.CurrentBlock
return <-errc
}

331
eth/protocol.go
View File

@ -1,16 +1,10 @@
package eth
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/errs"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
)
const (
@ -18,8 +12,8 @@ const (
NetworkId = 0
ProtocolLength = uint64(8)
ProtocolMaxMsgSize = 10 * 1024 * 1024
maxHashes = 256
maxBlocks = 64
maxHashes = 512
maxBlocks = 128
)
// eth protocol message codes
@ -34,6 +28,8 @@ const (
NewBlockMsg
)
type errCode int
const (
ErrMsgTooLarge = iota
ErrDecode
@ -46,6 +42,11 @@ const (
ErrSuspendedPeer
)
func (e errCode) String() string {
return errorToString[int(e)]
}
// XXX change once legacy code is out
var errorToString = map[int]string{
ErrMsgTooLarge: "Message too long",
ErrDecode: "Invalid message",
@ -58,20 +59,6 @@ var errorToString = map[int]string{
ErrSuspendedPeer: "Suspended peer",
}
// ethProtocol represents the ethereum wire protocol
// instance is running on each peer
type ethProtocol struct {
txPool txPool
chainManager chainManager
blockPool blockPool
peer *p2p.Peer
id string
rw p2p.MsgReadWriter
errors *errs.Errors
protocolVersion int
networkId int
}
// backend is the interface the ethereum protocol backend should implement
// used as an argument to EthProtocol
type txPool interface {
@ -85,308 +72,8 @@ type chainManager interface {
Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash)
}
type blockPool interface {
AddBlockHashes(next func() (common.Hash, bool), peerId string)
AddBlock(block *types.Block, peerId string)
AddPeer(td *big.Int, currentBlock common.Hash, peerId string, requestHashes func(common.Hash) error, requestBlocks func([]common.Hash) error, peerError func(*errs.Error)) (best bool, suspended bool)
RemovePeer(peerId string)
}
// message structs used for RLP serialization
type newBlockMsgData struct {
Block *types.Block
TD *big.Int
}
type getBlockHashesMsgData struct {
Hash common.Hash
Amount uint64
}
type statusMsgData struct {
ProtocolVersion uint32
NetworkId uint32
TD *big.Int
CurrentBlock common.Hash
GenesisBlock common.Hash
}
// main entrypoint, wrappers starting a server running the eth protocol
// use this constructor to attach the protocol ("class") to server caps
// the Dev p2p layer then runs the protocol instance on each peer
func EthProtocol(protocolVersion, networkId int, txPool txPool, chainManager chainManager, blockPool blockPool) p2p.Protocol {
return p2p.Protocol{
Name: "eth",
Version: uint(protocolVersion),
Length: ProtocolLength,
Run: func(peer *p2p.Peer, rw p2p.MsgReadWriter) error {
return runEthProtocol(protocolVersion, networkId, txPool, chainManager, blockPool, peer, rw)
},
}
}
// the main loop that handles incoming messages
// note RemovePeer in the post-disconnect hook
func runEthProtocol(protocolVersion, networkId int, txPool txPool, chainManager chainManager, blockPool blockPool, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
id := peer.ID()
self := &ethProtocol{
txPool: txPool,
chainManager: chainManager,
blockPool: blockPool,
rw: rw,
peer: peer,
protocolVersion: protocolVersion,
networkId: networkId,
errors: &errs.Errors{
Package: "ETH",
Errors: errorToString,
},
id: fmt.Sprintf("%x", id[:8]),
}
// handshake.
if err := self.handleStatus(); err != nil {
return err
}
defer self.blockPool.RemovePeer(self.id)
// propagate existing transactions. new transactions appearing
// after this will be sent via broadcasts.
if err := p2p.Send(rw, TxMsg, txPool.GetTransactions()); err != nil {
return err
}
// main loop. handle incoming messages.
for {
if err := self.handle(); err != nil {
return err
}
}
}
func (self *ethProtocol) handle() error {
msg, err := self.rw.ReadMsg()
if err != nil {
return err
}
if msg.Size > ProtocolMaxMsgSize {
return self.protoError(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
// make sure that the payload has been fully consumed
defer msg.Discard()
switch msg.Code {
case GetTxMsg: // ignore
case StatusMsg:
return self.protoError(ErrExtraStatusMsg, "")
case TxMsg:
// TODO: rework using lazy RLP stream
var txs []*types.Transaction
if err := msg.Decode(&txs); err != nil {
return self.protoError(ErrDecode, "msg %v: %v", msg, err)
}
for i, tx := range txs {
if tx == nil {
return self.protoError(ErrDecode, "transaction %d is nil", i)
}
jsonlogger.LogJson(&logger.EthTxReceived{
TxHash: tx.Hash().Hex(),
RemoteId: self.peer.ID().String(),
})
}
self.txPool.AddTransactions(txs)
case GetBlockHashesMsg:
var request getBlockHashesMsgData
if err := msg.Decode(&request); err != nil {
return self.protoError(ErrDecode, "->msg %v: %v", msg, err)
}
if request.Amount > maxHashes {
request.Amount = maxHashes
}
hashes := self.chainManager.GetBlockHashesFromHash(request.Hash, request.Amount)
return p2p.Send(self.rw, BlockHashesMsg, hashes)
case BlockHashesMsg:
msgStream := rlp.NewStream(msg.Payload)
if _, err := msgStream.List(); err != nil {
return err
}
var i int
iter := func() (hash common.Hash, ok bool) {
err := msgStream.Decode(&hash)
if err == rlp.EOL {
return common.Hash{}, false
} else if err != nil {
self.protoError(ErrDecode, "msg %v: after %v hashes : %v", msg, i, err)
return common.Hash{}, false
}
i++
return hash, true
}
self.blockPool.AddBlockHashes(iter, self.id)
case GetBlocksMsg:
msgStream := rlp.NewStream(msg.Payload)
if _, err := msgStream.List(); err != nil {
return err
}
var blocks []*types.Block
var i int
for {
i++
var hash common.Hash
err := msgStream.Decode(&hash)
if err == rlp.EOL {
break
} else if err != nil {
return self.protoError(ErrDecode, "msg %v: %v", msg, err)
}
block := self.chainManager.GetBlock(hash)
if block != nil {
blocks = append(blocks, block)
}
if i == maxBlocks {
break
}
}
return p2p.Send(self.rw, BlocksMsg, blocks)
case BlocksMsg:
msgStream := rlp.NewStream(msg.Payload)
if _, err := msgStream.List(); err != nil {
return err
}
for {
var block types.Block
if err := msgStream.Decode(&block); err != nil {
if err == rlp.EOL {
break
} else {
return self.protoError(ErrDecode, "msg %v: %v", msg, err)
}
}
if err := block.ValidateFields(); err != nil {
return self.protoError(ErrDecode, "block validation %v: %v", msg, err)
}
self.blockPool.AddBlock(&block, self.id)
}
case NewBlockMsg:
var request newBlockMsgData
if err := msg.Decode(&request); err != nil {
return self.protoError(ErrDecode, "%v: %v", msg, err)
}
if err := request.Block.ValidateFields(); err != nil {
return self.protoError(ErrDecode, "block validation %v: %v", msg, err)
}
hash := request.Block.Hash()
_, chainHead, _ := self.chainManager.Status()
jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
BlockHash: hash.Hex(),
BlockNumber: request.Block.Number(), // this surely must be zero
ChainHeadHash: chainHead.Hex(),
BlockPrevHash: request.Block.ParentHash().Hex(),
RemoteId: self.peer.ID().String(),
})
// to simplify backend interface adding a new block
// uses AddPeer followed by AddBlock only if peer is the best peer
// (or selected as new best peer)
if _, suspended := self.blockPool.AddPeer(request.TD, hash, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect); !suspended {
self.blockPool.AddBlock(request.Block, self.id)
}
default:
return self.protoError(ErrInvalidMsgCode, "%v", msg.Code)
}
return nil
}
func (self *ethProtocol) handleStatus() error {
if err := self.sendStatus(); err != nil {
return err
}
// read and handle remote status
msg, err := self.rw.ReadMsg()
if err != nil {
return err
}
if msg.Code != StatusMsg {
return self.protoError(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
}
if msg.Size > ProtocolMaxMsgSize {
return self.protoError(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
var status statusMsgData
if err := msg.Decode(&status); err != nil {
return self.protoError(ErrDecode, "msg %v: %v", msg, err)
}
_, _, genesisBlock := self.chainManager.Status()
if status.GenesisBlock != genesisBlock {
return self.protoError(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesisBlock)
}
if int(status.NetworkId) != self.networkId {
return self.protoError(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, self.networkId)
}
if int(status.ProtocolVersion) != self.protocolVersion {
return self.protoError(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, self.protocolVersion)
}
_, suspended := self.blockPool.AddPeer(status.TD, status.CurrentBlock, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect)
if suspended {
return self.protoError(ErrSuspendedPeer, "")
}
self.peer.Debugf("Peer is [eth] capable (%d/%d). TD=%v H=%x\n", status.ProtocolVersion, status.NetworkId, status.TD, status.CurrentBlock[:4])
return nil
}
func (self *ethProtocol) requestBlockHashes(from common.Hash) error {
self.peer.Debugf("fetching hashes (%d) %x...\n", maxHashes, from[0:4])
return p2p.Send(self.rw, GetBlockHashesMsg, getBlockHashesMsgData{from, maxHashes})
}
func (self *ethProtocol) requestBlocks(hashes []common.Hash) error {
self.peer.Debugf("fetching %v blocks", len(hashes))
return p2p.Send(self.rw, GetBlocksMsg, hashes)
}
func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *errs.Error) {
err = self.errors.New(code, format, params...)
//err.Log(self.peer.Logger)
err.Log(glog.V(logger.Info))
return
}
func (self *ethProtocol) sendStatus() error {
td, currentBlock, genesisBlock := self.chainManager.Status()
return p2p.Send(self.rw, StatusMsg, &statusMsgData{
ProtocolVersion: uint32(self.protocolVersion),
NetworkId: uint32(self.networkId),
TD: td,
CurrentBlock: currentBlock,
GenesisBlock: genesisBlock,
})
}
func (self *ethProtocol) protoErrorDisconnect(err *errs.Error) {
err.Log(glog.V(logger.Info))
if err.Fatal() {
self.peer.Disconnect(p2p.DiscSubprotocolError)
}
}

18
eth/protocol_test.go
View File

@ -1,20 +1,7 @@
package eth
import (
"log"
"math/big"
"os"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/errs"
ethlogger "github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
)
/*
TODO All of these tests need to be re-written
var logsys = ethlogger.NewStdLogSystem(os.Stdout, log.LstdFlags, ethlogger.LogLevel(ethlogger.DebugDetailLevel))
@ -398,3 +385,4 @@ func TestTransactionsMsg(t *testing.T) {
eth.checkError(ErrDecode, delay)
}
*/