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check and penalise td misreporting

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- add ErrIncorrectTD
- checkTD called after insertChain successful
- fix tests, use blockPoolTester.tds to map block index to TD
This commit is contained in:
zelig 2015-03-19 23:00:19 +00:00
parent a9926a289d
commit 137a9c9365
7 changed files with 129 additions and 52 deletions
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14
blockpool/blockpool.go
View File

@ -62,6 +62,7 @@ const (
ErrUnrequestedBlock
ErrInsufficientChainInfo
ErrIdleTooLong
ErrIncorrectTD
)
var errorToString = map[int]string{
@ -70,6 +71,7 @@ var errorToString = map[int]string{
ErrUnrequestedBlock: "Unrequested block",
ErrInsufficientChainInfo: "Insufficient chain info",
ErrIdleTooLong: "Idle too long",
ErrIncorrectTD: "Incorrect Total Difficulty",
}
// init initialises all your laundry
@ -373,6 +375,7 @@ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId st
block: bestpeer.currentBlock,
hashBy: peerId,
blockBy: peerId,
td: bestpeer.td,
}
// nodes is a list of nodes in one section ordered top-bottom (old to young)
nodes = append(nodes, node)
@ -729,6 +732,17 @@ LOOP:
}
}
func (self *BlockPool) checkTD(nodes ...*node) {
for _, n := range nodes {
if n.td != nil {
plog.DebugDetailf("peer td %v =?= block td %v", n.td, n.block.Td)
if n.td.Cmp(n.block.Td) != 0 {
self.peers.peerError(n.blockBy, ErrIncorrectTD, "on block %x", n.hash)
}
}
}
}
// must run in separate go routine, otherwise
// switchpeer -> activateChain -> activate deadlocks on section process select and peers.lock
func (self *BlockPool) requestBlocks(attempts int, hashes []common.Hash) {

72
blockpool/blockpool_test.go
View File

@ -51,9 +51,11 @@ func TestPeerPromotionByOptionalTdOnBlock(t *testing.T) {
blockPoolTester.initRefBlockChain(4)
peer0 := blockPoolTester.newPeer("peer0", 2, 2)
peer1 := blockPoolTester.newPeer("peer1", 1, 1)
peer2 := blockPoolTester.newPeer("peer2", 3, 4)
peer2 := blockPoolTester.newPeer("peer2", 4, 4)
blockPool.Start()
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[3] = 3
// pool
peer0.AddPeer()
@ -94,7 +96,7 @@ func TestSimpleChain(t *testing.T) {
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 2)
peer1 := blockPoolTester.newPeer("peer1", 2, 2)
peer1.AddPeer()
peer1.serveBlocks(1, 2)
go peer1.serveBlockHashes(2, 1, 0)
@ -114,7 +116,7 @@ func TestChainConnectingWithParentHash(t *testing.T) {
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 3)
peer1 := blockPoolTester.newPeer("peer1", 3, 3)
peer1.AddPeer()
go peer1.serveBlocks(2, 3)
go peer1.serveBlockHashes(3, 2, 1)
@ -134,7 +136,7 @@ func TestMultiSectionChain(t *testing.T) {
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 5)
peer1 := blockPoolTester.newPeer("peer1", 5, 5)
peer1.AddPeer()
go peer1.serveBlocks(4, 5)
@ -156,14 +158,16 @@ func TestNewBlocksOnPartialChain(t *testing.T) {
blockPoolTester.initRefBlockChain(7)
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 5)
peer1 := blockPoolTester.newPeer("peer1", 5, 5)
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[5] = 5
peer1.AddPeer()
go peer1.serveBlocks(4, 5) // partially complete section
go peer1.serveBlockHashes(5, 4, 3)
peer1.serveBlocks(3, 4) // partially complete section
// peer1 found new blocks
peer1.td = 2
peer1.td = 7
peer1.currentBlock = 7
peer1.AddPeer()
peer1.sendBlocks(6, 7)
@ -188,16 +192,15 @@ func TestPeerSwitchUp(t *testing.T) {
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 6)
peer2 := blockPoolTester.newPeer("peer2", 2, 7)
peer1 := blockPoolTester.newPeer("peer1", 6, 6)
peer2 := blockPoolTester.newPeer("peer2", 7, 7)
peer1.AddPeer()
go peer1.serveBlocks(5, 6)
go peer1.serveBlockHashes(6, 5, 4, 3) //
peer1.serveBlocks(2, 3) // section partially complete, block 3 will be preserved after peer demoted
peer2.AddPeer() // peer2 is promoted as best peer, peer1 is demoted
go peer2.serveBlocks(6, 7)
// go peer2.serveBlockHashes(7, 6) //
go peer2.serveBlocks(6, 7) //
go peer2.serveBlocks(4, 5) // tests that block request for earlier section is remembered
go peer1.serveBlocks(3, 4) // tests that connecting section by demoted peer is remembered and blocks are accepted from demoted peer
go peer2.serveBlockHashes(3, 2, 1, 0) // tests that known chain section is activated, hash requests from 3 is remembered
@ -216,8 +219,8 @@ func TestPeerSwitchDownOverlapSectionWithoutRootBlock(t *testing.T) {
blockPoolTester.initRefBlockChain(6)
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 4)
peer2 := blockPoolTester.newPeer("peer2", 2, 6)
peer1 := blockPoolTester.newPeer("peer1", 4, 4)
peer2 := blockPoolTester.newPeer("peer2", 6, 6)
peer2.AddPeer()
peer2.serveBlocks(5, 6) // partially complete, section will be preserved
@ -242,8 +245,8 @@ func TestPeerSwitchDownOverlapSectionWithRootBlock(t *testing.T) {
blockPoolTester.initRefBlockChain(6)
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 4)
peer2 := blockPoolTester.newPeer("peer2", 2, 6)
peer1 := blockPoolTester.newPeer("peer1", 4, 4)
peer2 := blockPoolTester.newPeer("peer2", 6, 6)
peer2.AddPeer()
peer2.serveBlocks(5, 6) // partially complete, section will be preserved
@ -269,8 +272,8 @@ func TestPeerSwitchDownDisjointSection(t *testing.T) {
blockPoolTester.initRefBlockChain(3)
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 3)
peer2 := blockPoolTester.newPeer("peer2", 2, 6)
peer1 := blockPoolTester.newPeer("peer1", 3, 3)
peer2 := blockPoolTester.newPeer("peer2", 6, 6)
peer2.AddPeer()
peer2.serveBlocks(5, 6) // partially complete, section will be preserved
@ -297,8 +300,8 @@ func TestPeerSwitchBack(t *testing.T) {
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 2, 11)
peer2 := blockPoolTester.newPeer("peer2", 1, 8)
peer1 := blockPoolTester.newPeer("peer1", 11, 11)
peer2 := blockPoolTester.newPeer("peer2", 8, 8)
peer2.AddPeer()
go peer2.serveBlocks(7, 8)
@ -328,9 +331,10 @@ func TestForkSimple(t *testing.T) {
delete(blockPoolTester.refBlockChain, 6)
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 9)
peer2 := blockPoolTester.newPeer("peer2", 2, 6)
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[6] = 10
peer1 := blockPoolTester.newPeer("peer1", 9, 9)
peer2 := blockPoolTester.newPeer("peer2", 10, 6)
peer1.AddPeer()
go peer1.serveBlocks(8, 9)
@ -363,9 +367,10 @@ func TestForkSwitchBackByNewBlocks(t *testing.T) {
delete(blockPoolTester.refBlockChain, 6)
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 9)
peer2 := blockPoolTester.newPeer("peer2", 2, 6)
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[6] = 10
peer1 := blockPoolTester.newPeer("peer1", 9, 9)
peer2 := blockPoolTester.newPeer("peer2", 10, 6)
peer1.AddPeer()
go peer1.serveBlocks(8, 9) //
@ -378,7 +383,7 @@ func TestForkSwitchBackByNewBlocks(t *testing.T) {
peer2.serveBlocks(1, 2, 3, 4, 5) //
// peer1 finds new blocks
peer1.td = 3
peer1.td = 11
peer1.currentBlock = 11
peer1.AddPeer()
go peer1.serveBlocks(10, 11)
@ -410,8 +415,14 @@ func TestForkSwitchBackByPeerSwitchBack(t *testing.T) {
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 9)
peer2 := blockPoolTester.newPeer("peer2", 2, 6)
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[6] = 10
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[6] = 10
peer1 := blockPoolTester.newPeer("peer1", 9, 9)
peer2 := blockPoolTester.newPeer("peer2", 10, 6)
peer1.AddPeer()
go peer1.serveBlocks(8, 9)
@ -448,8 +459,11 @@ func TestForkCompleteSectionSwitchBackByPeerSwitchBack(t *testing.T) {
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 9)
peer2 := blockPoolTester.newPeer("peer2", 2, 6)
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[6] = 10
peer1 := blockPoolTester.newPeer("peer1", 9, 9)
peer2 := blockPoolTester.newPeer("peer2", 10, 6)
peer1.AddPeer()
go peer1.serveBlocks(8, 9)

9
blockpool/blockpool_util_test.go
View File

@ -40,6 +40,7 @@ type blockPoolTester struct {
blockPool *BlockPool
t *testing.T
chainEvents *event.TypeMux
tds map[int]int
}
func newTestBlockPool(t *testing.T) (hashPool *test.TestHashPool, blockPool *BlockPool, b *blockPoolTester) {
@ -84,6 +85,14 @@ 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
if self.tds != nil {
td, ok = self.tds[child]
}
if !ok {
td = child
}
block.Td = big.NewInt(int64(td))
_, ok = self.blockChain[child]
if ok {
fmt.Printf("block %v already in blockchain\n", child)

28
blockpool/errors_test.go
View File

@ -93,7 +93,6 @@ func TestUnrequestedBlock(t *testing.T) {
peer1.AddPeer()
peer1.sendBlocks(1, 2)
// blockPool.Wait(waitTimeout)
blockPool.Stop()
if len(peer1.peerErrors) == 1 {
if peer1.peerErrors[0] != ErrUnrequestedBlock {
@ -124,6 +123,33 @@ func TestErrInsufficientChainInfo(t *testing.T) {
}
}
func TestIncorrectTD(t *testing.T) {
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
blockPoolTester.blockChain[0] = nil
blockPoolTester.initRefBlockChain(3)
blockPool.Start()
peer1 := blockPoolTester.newPeer("peer1", 1, 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) == 1 {
if peer1.peerErrors[0] != ErrIncorrectTD {
t.Errorf("wrong error, got %v, expected %v", peer1.peerErrors[0], ErrIncorrectTD)
}
} else {
t.Errorf("expected %v error, got %v", ErrIncorrectTD, peer1.peerErrors)
}
}
func TestPeerSuspension(t *testing.T) {
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)

7
blockpool/peers.go
View File

@ -452,8 +452,12 @@ func (self *peer) getBlockHashes() {
self.addError(ErrInvalidBlock, "%v", err)
self.bp.status.badPeers[self.id]++
} else {
if self.currentBlock.Td != nil {
if self.td.Cmp(self.currentBlock.Td) != 0 {
self.addError(ErrIncorrectTD, "on block %x", self.currentBlockHash)
}
}
headKey := self.parentHash.Str()
height := self.bp.status.chain[headKey] + 1
self.bp.status.chain[self.currentBlockHash.Str()] = height
if height > self.bp.status.values.LongestChain {
self.bp.status.values.LongestChain = height
@ -471,6 +475,7 @@ func (self *peer) getBlockHashes() {
block: self.currentBlock,
hashBy: self.id,
blockBy: self.id,
td: self.td,
}
self.bp.newSection([]*node{n}).activate(self)
} else {

18
blockpool/peers_test.go
View File

@ -15,9 +15,9 @@ import (
func TestAddPeer(t *testing.T) {
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
peer0 := blockPoolTester.newPeer("peer0", 1, 0)
peer1 := blockPoolTester.newPeer("peer1", 2, 1)
peer2 := blockPoolTester.newPeer("peer2", 3, 2)
peer0 := blockPoolTester.newPeer("peer0", 1, 1)
peer1 := blockPoolTester.newPeer("peer1", 2, 2)
peer2 := blockPoolTester.newPeer("peer2", 3, 3)
var bestpeer *peer
blockPool.Start()
@ -38,7 +38,7 @@ func TestAddPeer(t *testing.T) {
if blockPool.peers.best.id != "peer2" {
t.Errorf("peer2 (TD=3) not set as best")
}
peer2.waitBlocksRequests(2)
peer2.waitBlocksRequests(3)
best = peer1.AddPeer()
if best {
@ -52,7 +52,7 @@ func TestAddPeer(t *testing.T) {
}
peer2.td = 4
peer2.currentBlock = 3
peer2.currentBlock = 4
best = peer2.AddPeer()
if !best {
t.Errorf("peer2 (TD=4) not accepted as best")
@ -63,10 +63,10 @@ func TestAddPeer(t *testing.T) {
if blockPool.peers.best.td.Cmp(big.NewInt(int64(4))) != 0 {
t.Errorf("peer2 TD not updated")
}
peer2.waitBlocksRequests(3)
peer2.waitBlocksRequests(4)
peer1.td = 3
peer1.currentBlock = 2
peer1.currentBlock = 3
best = peer1.AddPeer()
if best {
t.Errorf("peer1 (TD=3) should not be set as best")
@ -88,7 +88,7 @@ func TestAddPeer(t *testing.T) {
if blockPool.peers.best.id != "peer1" {
t.Errorf("existing peer1 (TD=3) should be set as best peer")
}
peer1.waitBlocksRequests(2)
peer1.waitBlocksRequests(3)
blockPool.RemovePeer("peer1")
bestpeer, best = blockPool.peers.getPeer("peer1")
@ -99,7 +99,7 @@ func TestAddPeer(t *testing.T) {
if blockPool.peers.best.id != "peer0" {
t.Errorf("existing peer0 (TD=1) should be set as best peer")
}
peer0.waitBlocksRequests(0)
peer0.waitBlocksRequests(1)
blockPool.RemovePeer("peer0")
bestpeer, best = blockPool.peers.getPeer("peer0")

33
blockpool/section.go
View File

@ -83,9 +83,9 @@ func (self *BlockPool) newSection(nodes []*node) *section {
offC: make(chan bool),
}
for i, node := range nodes {
entry := &entry{node: node, section: sec, index: &index{i}}
self.set(node.hash, entry)
for i, n := range nodes {
entry := &entry{node: n, section: sec, index: &index{i}}
self.set(n.hash, entry)
}
plog.DebugDetailf("[%s] setup section process", sectionhex(sec))
@ -104,20 +104,22 @@ func (self *section) addSectionToBlockChain(p *peer) {
self.bp.wg.Done()
}()
var node *node
var nodes []*node
var n *node
var keys []string
var blocks []*types.Block
for self.poolRootIndex > 0 {
node = self.nodes[self.poolRootIndex-1]
node.lock.RLock()
block := node.block
node.lock.RUnlock()
n = self.nodes[self.poolRootIndex-1]
n.lock.RLock()
block := n.block
n.lock.RUnlock()
if block == nil {
break
}
self.poolRootIndex--
keys = append(keys, node.hash.Str())
blocks = append(blocks, block)
nodes = append(nodes, n)
}
if len(blocks) == 0 {
@ -134,13 +136,20 @@ func (self *section) addSectionToBlockChain(p *peer) {
err := self.bp.insertChain(blocks)
if err != nil {
self.invalid = true
self.bp.peers.peerError(node.blockBy, ErrInvalidBlock, "%v", err)
plog.Warnf("invalid block %x", node.hash)
plog.Warnf("penalise peers %v (hash), %v (block)", node.hashBy, node.blockBy)
self.bp.peers.peerError(n.blockBy, ErrInvalidBlock, "%v", err)
plog.Warnf("invalid block %x", n.hash)
plog.Warnf("penalise peers %v (hash), %v (block)", n.hashBy, n.blockBy)
// or invalid block and the entire chain needs to be removed
self.removeChain()
} else {
// check tds
self.bp.wg.Add(1)
go func() {
plog.DebugDetailf("checking td")
self.bp.checkTD(nodes...)
self.bp.wg.Done()
}()
// if all blocks inserted in this section
// then need to try to insert blocks in child section
if self.poolRootIndex == 0 {
@ -178,7 +187,7 @@ func (self *section) addSectionToBlockChain(p *peer) {
self.bp.status.values.BlocksInChain += len(blocks)
self.bp.status.values.BlocksInPool -= len(blocks)
if err != nil {
self.bp.status.badPeers[node.blockBy]++
self.bp.status.badPeers[n.blockBy]++
}
self.bp.status.lock.Unlock()