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Merge branch 'ethersphere-frontier/blockpool' into develop

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This commit is contained in:
obscuren 2015-04-09 17:40:28 +02:00
commit 01ee012197
12 changed files with 179 additions and 87 deletions
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110
blockpool/blockpool.go
View File

@ -132,6 +132,7 @@ type node struct {
block *types.Block
hashBy string
blockBy string
peers map[string]bool
td *big.Int
}
@ -376,13 +377,14 @@ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId st
var nodes []*node
hash, ok = next()
bestpeer.lock.Lock()
bestpeer.lock.RLock()
plog.Debugf("AddBlockHashes: peer <%s> starting from [%s] (peer head: %s)", peerId, hex(bestpeer.parentHash), hex(bestpeer.currentBlockHash))
// first check if we are building the head section of a peer's chain
if bestpeer.parentHash == hash {
if self.hasBlock(bestpeer.currentBlockHash) {
bestpeer.lock.RUnlock()
return
}
/*
@ -396,6 +398,7 @@ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId st
if entry := self.get(bestpeer.currentBlockHash); entry == nil {
plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) head section starting from [%s] ", peerId, hex(bestpeer.currentBlockHash), hex(bestpeer.parentHash))
// if head block is not yet in the pool, create entry and start node list for section
node := &node{
hash: bestpeer.currentBlockHash,
block: bestpeer.currentBlock,
@ -421,7 +424,7 @@ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId st
}
// the switch channel signals peerswitch event
switchC := bestpeer.switchC
bestpeer.lock.Unlock()
bestpeer.lock.RUnlock()
// iterate over hashes coming from peer (first round we have hash set above)
LOOP:
@ -547,8 +550,10 @@ LOOP:
In this case no activation should happen
*/
if parent != nil && !peerswitch {
self.activateChain(parent, bestpeer, nil)
bestpeer.lock.RLock()
self.activateChain(parent, bestpeer, bestpeer.switchC, nil)
plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): parent section [%s]", peerId, hex(bestpeer.currentBlockHash), sectionhex(parent))
bestpeer.lock.RUnlock()
}
/*
@ -622,53 +627,60 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) {
self.status.lock.Unlock()
entry := self.get(hash)
blockIsCurrentHead := false
sender.lock.RLock()
currentBlockHash := sender.currentBlockHash
currentBlock := sender.currentBlock
currentBlockC := sender.currentBlockC
switchC := sender.switchC
sender.lock.RUnlock()
// a peer's current head block is appearing the first time
if hash == sender.currentBlockHash {
if sender.currentBlock == nil {
plog.Debugf("AddBlock: add head block %s for peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
if hash == currentBlockHash {
// this happens when block came in a newblock message but
// also if sent in a blockmsg (for instance, if we requested, only if we
// dont apply on blockrequests the restriction of flood control)
blockIsCurrentHead = true
if currentBlock == nil {
sender.lock.Lock()
sender.setChainInfoFromBlock(block)
sender.lock.Unlock()
self.status.lock.Lock()
self.status.values.BlockHashes++
self.status.values.Blocks++
self.status.values.BlocksInPool++
self.status.lock.Unlock()
} else {
plog.DebugDetailf("AddBlock: head block %s for peer <%s> (head: %s) already known", hex(hash), peerId, hex(sender.currentBlockHash))
// signal to head section process
sender.currentBlockC <- block
select {
case currentBlockC <- block:
case <-switchC:
}
} else {
plog.DebugDetailf("AddBlock: head block %s for peer <%s> (head: %s) already known", hex(hash), peerId, hex(currentBlockHash))
}
} else {
plog.DebugDetailf("AddBlock: block %s received from peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
sender.lock.Lock()
// update peer chain info if more recent than what we registered
if block.Td != nil && block.Td.Cmp(sender.td) > 0 {
sender.td = block.Td
sender.currentBlockHash = block.Hash()
sender.parentHash = block.ParentHash()
sender.currentBlock = block
sender.headSection = nil
}
sender.lock.Unlock()
plog.DebugDetailf("AddBlock: block %s received from peer <%s> (head: %s)", hex(hash), peerId, hex(currentBlockHash))
/* @zelig !!!
requested 5 hashes from both A & B. A responds sooner then B, process blocks. Close section.
delayed B sends you block ... UNREQUESTED. Blocked
if entry == nil {
plog.DebugDetailf("AddBlock: unrequested block %s received from peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
sender.addError(ErrUnrequestedBlock, "%x", hash)
requested 5 hashes from both A & B. A responds sooner then B, process blocks. Close section.
delayed B sends you block ... UNREQUESTED. Blocked
if entry == nil {
plog.DebugDetailf("AddBlock: unrequested block %s received from peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
sender.addError(ErrUnrequestedBlock, "%x", hash)
self.status.lock.Lock()
self.status.badPeers[peerId]++
self.status.lock.Unlock()
return
}
self.status.lock.Lock()
self.status.badPeers[peerId]++
self.status.lock.Unlock()
return
}
*/
}
if entry == nil {
// FIXME: here check the cache find or create node -
// put peer as blockBy!
return
}
@ -676,10 +688,22 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) {
node.lock.Lock()
defer node.lock.Unlock()
// register peer on node as source
if node.peers == nil {
node.peers = make(map[string]bool)
}
FoundBlockCurrentHead, found := node.peers[sender.id]
if !found || FoundBlockCurrentHead {
// if found but not FoundBlockCurrentHead, then no update
// necessary (||)
node.peers[sender.id] = blockIsCurrentHead
// for those that are false, TD will update their head
// for those that are true, TD is checked !
// this is checked at the time of TD calculation in checkTD
}
// check if block already received
if node.block != nil {
plog.DebugDetailf("AddBlock: block %s from peer <%s> (head: %s) already sent by <%s> ", hex(hash), peerId, hex(sender.currentBlockHash), node.blockBy)
return
}
// check if block is already inserted in the blockchain
@ -690,6 +714,8 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) {
/*
@zelig needs discussing
Viktor: pow check can be delayed in a go routine and therefore cache
creation is not blocking
// validate block for PoW
if !self.verifyPoW(block) {
plog.Warnf("AddBlock: invalid PoW on block %s from peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
@ -705,7 +731,6 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) {
node.block = block
node.blockBy = peerId
node.td = block.Td // optional field
self.status.lock.Lock()
self.status.values.Blocks++
@ -719,11 +744,7 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) {
It activates the section process on incomplete sections with peer.
It relinks orphaned sections with their parent if root block (and its parent hash) is known.
*/
func (self *BlockPool) activateChain(sec *section, p *peer, connected map[common.Hash]*section) {
p.lock.RLock()
switchC := p.switchC
p.lock.RUnlock()
func (self *BlockPool) activateChain(sec *section, p *peer, switchC chan bool, connected map[common.Hash]*section) {
var i int
@ -766,14 +787,17 @@ LOOP:
// check if block's actual TD (calculated after successful insertChain) is identical to TD advertised for peer's head block.
func (self *BlockPool) checkTD(nodes ...*node) {
for _, n := range nodes {
if n.td != nil {
// skip check if queued future block
if n.td != nil && !n.block.Queued() {
plog.DebugDetailf("peer td %v =?= block td %v", n.td, n.block.Td)
/* @zelig: Commented out temp untill the rest of the network has been fixed.
if n.td.Cmp(n.block.Td) != 0 {
//self.peers.peerError(n.blockBy, ErrIncorrectTD, "on block %x", n.hash)
//self.status.lock.Lock()
//self.status.badPeers[n.blockBy]++
//self.status.lock.Unlock()
self.peers.peerError(n.blockBy, ErrIncorrectTD, "on block %x", n.hash)
self.status.lock.Lock()
self.status.badPeers[n.blockBy]++
self.status.lock.Unlock()
}
*/
}
}
}

4
blockpool/blockpool_test.go
View File

@ -7,6 +7,10 @@ import (
"github.com/ethereum/go-ethereum/blockpool/test"
)
func init() {
test.LogInit()
}
// using the mock framework in blockpool_util_test
// we test various scenarios here

2
blockpool/blockpool_util_test.go
View File

@ -87,7 +87,7 @@ func (self *blockPoolTester) insertChain(blocks types.Blocks) error {
var ok bool
for _, block := range blocks {
child = self.hashPool.HashesToIndexes([]common.Hash{block.Hash()})[0]
var td int
td := child
if self.tds != nil {
td, ok = self.tds[child]
}

45
blockpool/errors_test.go
View File

@ -39,6 +39,8 @@ func TestInvalidBlock(t *testing.T) {
}
func TestVerifyPoW(t *testing.T) {
t.Skip() // :FIXME:
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
blockPoolTester.blockChain[0] = nil
@ -84,6 +86,8 @@ func TestVerifyPoW(t *testing.T) {
}
func TestUnrequestedBlock(t *testing.T) {
t.Skip() // :FIXME:
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
blockPoolTester.blockChain[0] = nil
@ -124,8 +128,6 @@ func TestErrInsufficientChainInfo(t *testing.T) {
}
func TestIncorrectTD(t *testing.T) {
t.Skip() // @zelig this one requires fixing for the TD
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
blockPoolTester.blockChain[0] = nil
@ -152,6 +154,45 @@ func TestIncorrectTD(t *testing.T) {
}
}
func TestSkipIncorrectTDonFutureBlocks(t *testing.T) {
// t.Skip() // @zelig this one requires fixing for the TD
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
blockPoolTester.blockChain[0] = nil
blockPoolTester.initRefBlockChain(3)
blockPool.insertChain = func(blocks types.Blocks) error {
err := blockPoolTester.insertChain(blocks)
if err == nil {
for _, block := range blocks {
if block.Td.Cmp(common.Big3) == 0 {
block.Td = common.Big3
block.SetQueued(true)
break
}
}
}
return err
}
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 3, 3)
peer1.AddPeer()
go peer1.serveBlocks(2, 3)
go peer1.serveBlockHashes(3, 2, 1, 0)
peer1.serveBlocks(0, 1, 2)
blockPool.Wait(waitTimeout)
blockPool.Stop()
blockPoolTester.refBlockChain[3] = []int{}
blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
if len(peer1.peerErrors) > 0 {
t.Errorf("expected no error, got %v (1 of %v)", peer1.peerErrors[0], len(peer1.peerErrors))
}
}
func TestPeerSuspension(t *testing.T) {
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)

54
blockpool/peers.go
View File

@ -57,7 +57,8 @@ type peer struct {
// peers is the component keeping a record of peers in a hashmap
//
type peers struct {
lock sync.RWMutex
lock sync.RWMutex
bllock sync.Mutex
bp *BlockPool
errors *errs.Errors
@ -109,15 +110,15 @@ func (self *peers) peerError(id string, code int, format string, params ...inter
// record time of offence in blacklist to implement suspension for PeerSuspensionInterval
func (self *peers) addToBlacklist(id string) {
self.lock.Lock()
defer self.lock.Unlock()
self.bllock.Lock()
defer self.bllock.Unlock()
self.blacklist[id] = time.Now()
}
// suspended checks if peer is still suspended
// suspended checks if peer is still suspended, caller should hold peers.lock
func (self *peers) suspended(id string) (s bool) {
self.lock.Lock()
defer self.lock.Unlock()
self.bllock.Lock()
defer self.bllock.Unlock()
if suspendedAt, ok := self.blacklist[id]; ok {
if s = suspendedAt.Add(self.bp.Config.PeerSuspensionInterval).After(time.Now()); !s {
// no longer suspended, delete entry
@ -142,9 +143,8 @@ func (self *peer) setChainInfo(td *big.Int, c common.Hash) {
self.headSection = nil
}
// caller must hold peer lock
func (self *peer) setChainInfoFromBlock(block *types.Block) {
self.lock.Lock()
defer self.lock.Unlock()
// use the optional TD to update peer td, this helps second best peer selection
// in case best peer is lost
if block.Td != nil && block.Td.Cmp(self.td) > 0 {
@ -155,16 +155,12 @@ func (self *peer) setChainInfoFromBlock(block *types.Block) {
self.currentBlock = block
self.headSection = nil
}
self.bp.wg.Add(1)
go func() {
self.currentBlockC <- block
self.bp.wg.Done()
}()
}
// distribute block request among known peers
func (self *peers) requestBlocks(attempts int, hashes []common.Hash) {
self.lock.RLock()
defer self.lock.RUnlock()
peerCount := len(self.peers)
// on first attempt use the best peer
@ -210,13 +206,14 @@ func (self *peers) addPeer(
peerError func(*errs.Error),
) (best bool, suspended bool) {
self.lock.Lock()
defer self.lock.Unlock()
var previousBlockHash common.Hash
if self.suspended(id) {
suspended = true
return
}
self.lock.Lock()
defer self.lock.Unlock()
p, found := self.peers[id]
if found {
// when called on an already connected peer, it means a newBlockMsg is received
@ -260,7 +257,7 @@ func (self *peers) addPeer(
p.headSectionC <- nil
if entry := self.bp.get(previousBlockHash); entry != nil {
plog.DebugDetailf("addPeer: <%s> previous head : %v found in pool, activate", id, hex(previousBlockHash))
self.bp.activateChain(entry.section, p, nil)
self.bp.activateChain(entry.section, p, p.switchC, nil)
p.sections = append(p.sections, previousBlockHash)
}
}
@ -270,8 +267,8 @@ func (self *peers) addPeer(
currentTD := self.bp.getTD()
bestpeer := self.best
if bestpeer != nil {
bestpeer.lock.Lock()
defer bestpeer.lock.Unlock()
bestpeer.lock.RLock()
defer bestpeer.lock.RUnlock()
currentTD = self.best.td
}
if td.Cmp(currentTD) > 0 {
@ -367,14 +364,14 @@ func (self *BlockPool) switchPeer(oldp, newp *peer) {
if connected[hash] == nil {
// if not deleted, then reread from pool (it can be orphaned top half of a split section)
if entry := self.get(hash); entry != nil {
self.activateChain(entry.section, newp, connected)
self.activateChain(entry.section, newp, newp.switchC, connected)
connected[hash] = entry.section
sections = append(sections, hash)
}
}
}
plog.DebugDetailf("<%s> section processes (%v non-contiguous sequences, was %v before)", newp.id, len(sections), len(newp.sections))
// need to lock now that newp is exposed to section processes
// need to lock now that newp is exposed to section processesr
newp.lock.Lock()
newp.sections = sections
newp.lock.Unlock()
@ -462,6 +459,8 @@ func (self *peer) getCurrentBlock(currentBlock *types.Block) {
}
func (self *peer) getBlockHashes() bool {
self.lock.Lock()
defer self.lock.Unlock()
//if connecting parent is found
if self.bp.hasBlock(self.parentHash) {
plog.DebugDetailf("HeadSection: <%s> parent block %s found in blockchain", self.id, hex(self.parentHash))
@ -474,13 +473,16 @@ func (self *peer) getBlockHashes() bool {
self.addError(ErrInvalidBlock, "%v", err)
self.bp.status.badPeers[self.id]++
} else {
/* @zelig: Commented out temp untill the rest of the network has been fixed.
// XXX added currentBlock check (?)
if self.currentBlock != nil && self.currentBlock.Td != nil {
if self.currentBlock != nil && self.currentBlock.Td != nil && !self.currentBlock.Queued() {
plog.DebugDetailf("HeadSection: <%s> inserted %s to blockchain... check TD %v =?= %v", self.id, hex(self.parentHash), self.td, self.currentBlock.Td)
if self.td.Cmp(self.currentBlock.Td) != 0 {
//self.addError(ErrIncorrectTD, "on block %x", self.currentBlockHash)
//self.bp.status.badPeers[self.id]++
self.addError(ErrIncorrectTD, "on block %x", self.currentBlockHash)
self.bp.status.badPeers[self.id]++
}
}
*/
headKey := self.parentHash
height := self.bp.status.chain[headKey] + 1
self.bp.status.chain[self.currentBlockHash] = height
@ -504,7 +506,7 @@ func (self *peer) getBlockHashes() bool {
self.bp.newSection([]*node{n}).activate(self)
} else {
plog.DebugDetailf("HeadSection: <%s> connecting parent %s found in pool...head section [%s] exists...not requesting hashes", self.id, hex(self.parentHash), sectionhex(parent.section))
self.bp.activateChain(parent.section, self, nil)
self.bp.activateChain(parent.section, self, self.switchC, nil)
}
} else {
plog.DebugDetailf("HeadSection: <%s> section [%s] requestBlockHashes", self.id, sectionhex(self.headSection))
@ -528,6 +530,7 @@ func (self *peer) run() {
self.lock.RLock()
switchC := self.switchC
plog.Debugf("HeadSection: <%s> section process for head %s started", self.id, hex(self.currentBlockHash))
self.lock.RUnlock()
self.blockHashesRequestTimer = nil
@ -570,7 +573,6 @@ LOOP:
self.bp.status.badPeers[self.id]++
self.bp.status.lock.Unlock()
// there is no persistence here, so GC will just take care of cleaning up
break LOOP
// signal for peer switch, quit
case <-switchC:
@ -593,9 +595,9 @@ LOOP:
self.bp.status.badPeers[self.id]++
self.bp.status.lock.Unlock()
plog.Debugf("HeadSection: <%s> (headsection [%s]) quit channel closed : timed out without providing new blocks...quitting", self.id, sectionhex(self.headSection))
break LOOP
}
}
if !self.idle {
self.idle = true
self.bp.wg.Done()

12
blockpool/peers_test.go
View File

@ -144,7 +144,8 @@ func TestAddPeer(t *testing.T) {
blockPool.Stop()
}
func TestPeerPromotionByOptionalTdOnBlock(t *testing.T) {
func TestPeerPromotionByTdOnBlock(t *testing.T) {
t.Skip()
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
blockPoolTester.blockChain[0] = nil
@ -168,13 +169,8 @@ func TestPeerPromotionByOptionalTdOnBlock(t *testing.T) {
best = peer2.AddPeer()
peer2.serveBlocks(3, 4)
peer2.serveBlockHashes(4, 3, 2, 1)
hashes := blockPoolTester.hashPool.IndexesToHashes([]int{2, 3})
peer1.waitBlocksRequests(3)
blockPool.AddBlock(&types.Block{
HeaderHash: common.Hash(hashes[1]),
ParentHeaderHash: common.Hash(hashes[0]),
Td: common.Big3,
}, "peer1")
// hashes := blockPoolTester.hashPool.IndexesToHashes([]int{2, 3})
peer1.serveBlocks(2, 3)
blockPool.RemovePeer("peer2")
if blockPool.peers.best.id != "peer1" {

2
blockpool/section.go
View File

@ -489,7 +489,7 @@ func (self *section) blockHashesRequest() {
// activate parent section with this peer
// but only if not during switch mode
plog.DebugDetailf("[%s] parent section [%s] activated\n", sectionhex(self), sectionhex(parentSection))
self.bp.activateChain(parentSection, self.peer, nil)
self.bp.activateChain(parentSection, self.peer, self.peer.switchC, nil)
// if not root of chain, switch off
plog.DebugDetailf("[%s] parent found, hash requests deactivated (after %v total attempts)\n", sectionhex(self), self.blockHashesRequests)
self.blockHashesRequestTimer = nil

7
blockpool/status_test.go
View File

@ -60,6 +60,8 @@ func checkStatus(t *testing.T, bp *BlockPool, syncing bool, expected []int) (err
}
func TestBlockPoolStatus(t *testing.T) {
t.Skip() // :FIXME:
test.LogInit()
var err error
n := 3
@ -87,7 +89,7 @@ func testBlockPoolStatus(t *testing.T) (err error) {
delete(blockPoolTester.refBlockChain, 6)
blockPool.Start()
defer blockPool.Stop()
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[9] = 1
blockPoolTester.tds[11] = 3
@ -107,6 +109,7 @@ func testBlockPoolStatus(t *testing.T) (err error) {
}
peer1.AddPeer()
expected = []int{0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0}
err = checkStatus(nil, blockPool, true, expected)
if err != nil {
@ -242,6 +245,8 @@ func testBlockPoolStatus(t *testing.T) (err error) {
peer3.serveBlocks(0, 1)
blockPool.Wait(waitTimeout)
time.Sleep(200 * time.Millisecond)
blockPool.Stop()
expected = []int{14, 3, 11, 3, 8, 4, 1, 8, 4, 3, 4, 3, 1}
err = checkStatus(nil, blockPool, false, expected)
if err != nil {

1
core/chain_manager.go
View File

@ -463,6 +463,7 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
// Do not penelise on future block. We'll need a block queue eventually that will queue
// future block for future use
if err == BlockFutureErr {
block.SetQueued(true)
self.futureBlocks.Push(block)
stats.queued++
continue

4
core/types/block.go
View File

@ -97,6 +97,7 @@ type Block struct {
uncles []*Header
transactions Transactions
Td *big.Int
queued bool // flag for blockpool to skip TD check
receipts Receipts
}
@ -268,6 +269,9 @@ func (self *Block) SetNonce(nonce uint64) {
self.header.SetNonce(nonce)
}
func (self *Block) Queued() bool { return self.queued }
func (self *Block) SetQueued(q bool) { self.queued = q }
func (self *Block) Bloom() Bloom { return self.header.Bloom }
func (self *Block) Coinbase() common.Address { return self.header.Coinbase }
func (self *Block) Time() int64 { return int64(self.header.Time) }

10
errs/errors.go
View File

@ -4,6 +4,7 @@ import (
"fmt"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
)
/*
@ -76,9 +77,18 @@ func (self Error) Error() (message string) {
return self.message
}
func (self Error) Log(v glog.Verbose) {
if v {
v.Infoln(self)
}
//log.Sendln(self.level, self)
}
/*
func (self Error) Log(log *logger.Logger) {
log.Sendln(self.level, self)
}
*/
/*
err.Fatal() is true if err's severity level is 0 or 1 (logger.ErrorLevel or logger.Silence)

15
eth/protocol.go
View File

@ -8,6 +8,7 @@ import (
"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"
)
@ -366,7 +367,8 @@ func (self *ethProtocol) requestBlocks(hashes []common.Hash) error {
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(self.peer.Logger)
err.Log(glog.V(logger.Info))
return
}
@ -382,8 +384,11 @@ func (self *ethProtocol) sendStatus() error {
}
func (self *ethProtocol) protoErrorDisconnect(err *errs.Error) {
err.Log(self.peer.Logger)
if err.Fatal() {
self.peer.Disconnect(p2p.DiscSubprotocolError)
}
//err.Log(self.peer.Logger)
err.Log(glog.V(logger.Info))
/*
if err.Fatal() {
self.peer.Disconnect(p2p.DiscSubprotocolError)
}
*/
}