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les: implement new les fetcher (#20692)

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* cmd, consensus, eth, les: implement light fetcher

* les: address comment

* les: address comment

* les: address comments

* les: check td after delivery

* les: add linearExpiredValue for error counter

* les: fix import

* les: fix dead lock

* les: order announces by td

* les: encapsulate invalid counter

* les: address comment

* les: add more checks during the delivery

* les: fix log

* eth, les: fix lint

* eth/fetcher: address comment
This commit is contained in:
gary rong 2020-07-28 23:02:35 +08:00 committed by GitHub
parent 93da0cf8a1
commit 28c5a8a54b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
22 changed files with 1366 additions and 1062 deletions
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18
cmd/geth/retesteth.go
View File

@ -200,11 +200,11 @@ func (e *NoRewardEngine) Author(header *types.Header) (common.Address, error) {
return e.inner.Author(header) return e.inner.Author(header)
} }
func (e *NoRewardEngine) VerifyHeader(chain consensus.ChainReader, header *types.Header, seal bool) error { func (e *NoRewardEngine) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error {
return e.inner.VerifyHeader(chain, header, seal) return e.inner.VerifyHeader(chain, header, seal)
} }
func (e *NoRewardEngine) VerifyHeaders(chain consensus.ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) { func (e *NoRewardEngine) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
return e.inner.VerifyHeaders(chain, headers, seals) return e.inner.VerifyHeaders(chain, headers, seals)
} }
@ -212,11 +212,11 @@ func (e *NoRewardEngine) VerifyUncles(chain consensus.ChainReader, block *types.
return e.inner.VerifyUncles(chain, block) return e.inner.VerifyUncles(chain, block)
} }
func (e *NoRewardEngine) VerifySeal(chain consensus.ChainReader, header *types.Header) error { func (e *NoRewardEngine) VerifySeal(chain consensus.ChainHeaderReader, header *types.Header) error {
return e.inner.VerifySeal(chain, header) return e.inner.VerifySeal(chain, header)
} }
func (e *NoRewardEngine) Prepare(chain consensus.ChainReader, header *types.Header) error { func (e *NoRewardEngine) Prepare(chain consensus.ChainHeaderReader, header *types.Header) error {
return e.inner.Prepare(chain, header) return e.inner.Prepare(chain, header)
} }
@ -229,7 +229,7 @@ func (e *NoRewardEngine) accumulateRewards(config *params.ChainConfig, state *st
state.AddBalance(header.Coinbase, reward) state.AddBalance(header.Coinbase, reward)
} }
func (e *NoRewardEngine) Finalize(chain consensus.ChainReader, header *types.Header, statedb *state.StateDB, txs []*types.Transaction, func (e *NoRewardEngine) Finalize(chain consensus.ChainHeaderReader, header *types.Header, statedb *state.StateDB, txs []*types.Transaction,
uncles []*types.Header) { uncles []*types.Header) {
if e.rewardsOn { if e.rewardsOn {
e.inner.Finalize(chain, header, statedb, txs, uncles) e.inner.Finalize(chain, header, statedb, txs, uncles)
@ -239,7 +239,7 @@ func (e *NoRewardEngine) Finalize(chain consensus.ChainReader, header *types.Hea
} }
} }
func (e *NoRewardEngine) FinalizeAndAssemble(chain consensus.ChainReader, header *types.Header, statedb *state.StateDB, txs []*types.Transaction, func (e *NoRewardEngine) FinalizeAndAssemble(chain consensus.ChainHeaderReader, header *types.Header, statedb *state.StateDB, txs []*types.Transaction,
uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) { uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) {
if e.rewardsOn { if e.rewardsOn {
return e.inner.FinalizeAndAssemble(chain, header, statedb, txs, uncles, receipts) return e.inner.FinalizeAndAssemble(chain, header, statedb, txs, uncles, receipts)
@ -252,7 +252,7 @@ func (e *NoRewardEngine) FinalizeAndAssemble(chain consensus.ChainReader, header
} }
} }
func (e *NoRewardEngine) Seal(chain consensus.ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error { func (e *NoRewardEngine) Seal(chain consensus.ChainHeaderReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error {
return e.inner.Seal(chain, block, results, stop) return e.inner.Seal(chain, block, results, stop)
} }
@ -260,11 +260,11 @@ func (e *NoRewardEngine) SealHash(header *types.Header) common.Hash {
return e.inner.SealHash(header) return e.inner.SealHash(header)
} }
func (e *NoRewardEngine) CalcDifficulty(chain consensus.ChainReader, time uint64, parent *types.Header) *big.Int { func (e *NoRewardEngine) CalcDifficulty(chain consensus.ChainHeaderReader, time uint64, parent *types.Header) *big.Int {
return e.inner.CalcDifficulty(chain, time, parent) return e.inner.CalcDifficulty(chain, time, parent)
} }
func (e *NoRewardEngine) APIs(chain consensus.ChainReader) []rpc.API { func (e *NoRewardEngine) APIs(chain consensus.ChainHeaderReader) []rpc.API {
return e.inner.APIs(chain) return e.inner.APIs(chain)
} }

2
consensus/clique/api.go
View File

@ -28,7 +28,7 @@ import (
// API is a user facing RPC API to allow controlling the signer and voting // API is a user facing RPC API to allow controlling the signer and voting
// mechanisms of the proof-of-authority scheme. // mechanisms of the proof-of-authority scheme.
type API struct { type API struct {
chain consensus.ChainReader chain consensus.ChainHeaderReader
clique *Clique clique *Clique
} }

26
consensus/clique/clique.go
View File

@ -213,14 +213,14 @@ func (c *Clique) Author(header *types.Header) (common.Address, error) {
} }
// VerifyHeader checks whether a header conforms to the consensus rules. // VerifyHeader checks whether a header conforms to the consensus rules.
func (c *Clique) VerifyHeader(chain consensus.ChainReader, header *types.Header, seal bool) error { func (c *Clique) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error {
return c.verifyHeader(chain, header, nil) return c.verifyHeader(chain, header, nil)
} }
// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers. The // VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers. The
// method returns a quit channel to abort the operations and a results channel to // method returns a quit channel to abort the operations and a results channel to
// retrieve the async verifications (the order is that of the input slice). // retrieve the async verifications (the order is that of the input slice).
func (c *Clique) VerifyHeaders(chain consensus.ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) { func (c *Clique) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
abort := make(chan struct{}) abort := make(chan struct{})
results := make(chan error, len(headers)) results := make(chan error, len(headers))
@ -242,7 +242,7 @@ func (c *Clique) VerifyHeaders(chain consensus.ChainReader, headers []*types.Hea
// caller may optionally pass in a batch of parents (ascending order) to avoid // caller may optionally pass in a batch of parents (ascending order) to avoid
// looking those up from the database. This is useful for concurrently verifying // looking those up from the database. This is useful for concurrently verifying
// a batch of new headers. // a batch of new headers.
func (c *Clique) verifyHeader(chain consensus.ChainReader, header *types.Header, parents []*types.Header) error { func (c *Clique) verifyHeader(chain consensus.ChainHeaderReader, header *types.Header, parents []*types.Header) error {
if header.Number == nil { if header.Number == nil {
return errUnknownBlock return errUnknownBlock
} }
@ -305,7 +305,7 @@ func (c *Clique) verifyHeader(chain consensus.ChainReader, header *types.Header,
// rather depend on a batch of previous headers. The caller may optionally pass // rather depend on a batch of previous headers. The caller may optionally pass
// in a batch of parents (ascending order) to avoid looking those up from the // in a batch of parents (ascending order) to avoid looking those up from the
// database. This is useful for concurrently verifying a batch of new headers. // database. This is useful for concurrently verifying a batch of new headers.
func (c *Clique) verifyCascadingFields(chain consensus.ChainReader, header *types.Header, parents []*types.Header) error { func (c *Clique) verifyCascadingFields(chain consensus.ChainHeaderReader, header *types.Header, parents []*types.Header) error {
// The genesis block is the always valid dead-end // The genesis block is the always valid dead-end
number := header.Number.Uint64() number := header.Number.Uint64()
if number == 0 { if number == 0 {
@ -345,7 +345,7 @@ func (c *Clique) verifyCascadingFields(chain consensus.ChainReader, header *type
} }
// snapshot retrieves the authorization snapshot at a given point in time. // snapshot retrieves the authorization snapshot at a given point in time.
func (c *Clique) snapshot(chain consensus.ChainReader, number uint64, hash common.Hash, parents []*types.Header) (*Snapshot, error) { func (c *Clique) snapshot(chain consensus.ChainHeaderReader, number uint64, hash common.Hash, parents []*types.Header) (*Snapshot, error) {
// Search for a snapshot in memory or on disk for checkpoints // Search for a snapshot in memory or on disk for checkpoints
var ( var (
headers []*types.Header headers []*types.Header
@ -436,7 +436,7 @@ func (c *Clique) VerifyUncles(chain consensus.ChainReader, block *types.Block) e
// VerifySeal implements consensus.Engine, checking whether the signature contained // VerifySeal implements consensus.Engine, checking whether the signature contained
// in the header satisfies the consensus protocol requirements. // in the header satisfies the consensus protocol requirements.
func (c *Clique) VerifySeal(chain consensus.ChainReader, header *types.Header) error { func (c *Clique) VerifySeal(chain consensus.ChainHeaderReader, header *types.Header) error {
return c.verifySeal(chain, header, nil) return c.verifySeal(chain, header, nil)
} }
@ -444,7 +444,7 @@ func (c *Clique) VerifySeal(chain consensus.ChainReader, header *types.Header) e
// consensus protocol requirements. The method accepts an optional list of parent // consensus protocol requirements. The method accepts an optional list of parent
// headers that aren't yet part of the local blockchain to generate the snapshots // headers that aren't yet part of the local blockchain to generate the snapshots
// from. // from.
func (c *Clique) verifySeal(chain consensus.ChainReader, header *types.Header, parents []*types.Header) error { func (c *Clique) verifySeal(chain consensus.ChainHeaderReader, header *types.Header, parents []*types.Header) error {
// Verifying the genesis block is not supported // Verifying the genesis block is not supported
number := header.Number.Uint64() number := header.Number.Uint64()
if number == 0 { if number == 0 {
@ -487,7 +487,7 @@ func (c *Clique) verifySeal(chain consensus.ChainReader, header *types.Header, p
// Prepare implements consensus.Engine, preparing all the consensus fields of the // Prepare implements consensus.Engine, preparing all the consensus fields of the
// header for running the transactions on top. // header for running the transactions on top.
func (c *Clique) Prepare(chain consensus.ChainReader, header *types.Header) error { func (c *Clique) Prepare(chain consensus.ChainHeaderReader, header *types.Header) error {
// If the block isn't a checkpoint, cast a random vote (good enough for now) // If the block isn't a checkpoint, cast a random vote (good enough for now)
header.Coinbase = common.Address{} header.Coinbase = common.Address{}
header.Nonce = types.BlockNonce{} header.Nonce = types.BlockNonce{}
@ -552,7 +552,7 @@ func (c *Clique) Prepare(chain consensus.ChainReader, header *types.Header) erro
// Finalize implements consensus.Engine, ensuring no uncles are set, nor block // Finalize implements consensus.Engine, ensuring no uncles are set, nor block
// rewards given. // rewards given.
func (c *Clique) Finalize(chain consensus.ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header) { func (c *Clique) Finalize(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header) {
// No block rewards in PoA, so the state remains as is and uncles are dropped // No block rewards in PoA, so the state remains as is and uncles are dropped
header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number)) header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number))
header.UncleHash = types.CalcUncleHash(nil) header.UncleHash = types.CalcUncleHash(nil)
@ -560,7 +560,7 @@ func (c *Clique) Finalize(chain consensus.ChainReader, header *types.Header, sta
// FinalizeAndAssemble implements consensus.Engine, ensuring no uncles are set, // FinalizeAndAssemble implements consensus.Engine, ensuring no uncles are set,
// nor block rewards given, and returns the final block. // nor block rewards given, and returns the final block.
func (c *Clique) FinalizeAndAssemble(chain consensus.ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) { func (c *Clique) FinalizeAndAssemble(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) {
// No block rewards in PoA, so the state remains as is and uncles are dropped // No block rewards in PoA, so the state remains as is and uncles are dropped
header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number)) header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number))
header.UncleHash = types.CalcUncleHash(nil) header.UncleHash = types.CalcUncleHash(nil)
@ -581,7 +581,7 @@ func (c *Clique) Authorize(signer common.Address, signFn SignerFn) {
// Seal implements consensus.Engine, attempting to create a sealed block using // Seal implements consensus.Engine, attempting to create a sealed block using
// the local signing credentials. // the local signing credentials.
func (c *Clique) Seal(chain consensus.ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error { func (c *Clique) Seal(chain consensus.ChainHeaderReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error {
header := block.Header() header := block.Header()
// Sealing the genesis block is not supported // Sealing the genesis block is not supported
@ -654,7 +654,7 @@ func (c *Clique) Seal(chain consensus.ChainReader, block *types.Block, results c
// CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty // CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty
// that a new block should have based on the previous blocks in the chain and the // that a new block should have based on the previous blocks in the chain and the
// current signer. // current signer.
func (c *Clique) CalcDifficulty(chain consensus.ChainReader, time uint64, parent *types.Header) *big.Int { func (c *Clique) CalcDifficulty(chain consensus.ChainHeaderReader, time uint64, parent *types.Header) *big.Int {
snap, err := c.snapshot(chain, parent.Number.Uint64(), parent.Hash(), nil) snap, err := c.snapshot(chain, parent.Number.Uint64(), parent.Hash(), nil)
if err != nil { if err != nil {
return nil return nil
@ -684,7 +684,7 @@ func (c *Clique) Close() error {
// APIs implements consensus.Engine, returning the user facing RPC API to allow // APIs implements consensus.Engine, returning the user facing RPC API to allow
// controlling the signer voting. // controlling the signer voting.
func (c *Clique) APIs(chain consensus.ChainReader) []rpc.API { func (c *Clique) APIs(chain consensus.ChainHeaderReader) []rpc.API {
return []rpc.API{{ return []rpc.API{{
Namespace: "clique", Namespace: "clique",
Version: "1.0", Version: "1.0",

30
consensus/consensus.go
View File

@ -27,9 +27,9 @@ import (
"github.com/ethereum/go-ethereum/rpc" "github.com/ethereum/go-ethereum/rpc"
) )
// ChainReader defines a small collection of methods needed to access the local // ChainHeaderReader defines a small collection of methods needed to access the local
// blockchain during header and/or uncle verification. // blockchain during header verification.
type ChainReader interface { type ChainHeaderReader interface {
// Config retrieves the blockchain's chain configuration. // Config retrieves the blockchain's chain configuration.
Config() *params.ChainConfig Config() *params.ChainConfig
@ -44,6 +44,12 @@ type ChainReader interface {
// GetHeaderByHash retrieves a block header from the database by its hash. // GetHeaderByHash retrieves a block header from the database by its hash.
GetHeaderByHash(hash common.Hash) *types.Header GetHeaderByHash(hash common.Hash) *types.Header
}
// ChainReader defines a small collection of methods needed to access the local
// blockchain during header and/or uncle verification.
type ChainReader interface {
ChainHeaderReader
// GetBlock retrieves a block from the database by hash and number. // GetBlock retrieves a block from the database by hash and number.
GetBlock(hash common.Hash, number uint64) *types.Block GetBlock(hash common.Hash, number uint64) *types.Block
@ -59,13 +65,13 @@ type Engine interface {
// VerifyHeader checks whether a header conforms to the consensus rules of a // VerifyHeader checks whether a header conforms to the consensus rules of a
// given engine. Verifying the seal may be done optionally here, or explicitly // given engine. Verifying the seal may be done optionally here, or explicitly
// via the VerifySeal method. // via the VerifySeal method.
VerifyHeader(chain ChainReader, header *types.Header, seal bool) error VerifyHeader(chain ChainHeaderReader, header *types.Header, seal bool) error
// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers // VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
// concurrently. The method returns a quit channel to abort the operations and // concurrently. The method returns a quit channel to abort the operations and
// a results channel to retrieve the async verifications (the order is that of // a results channel to retrieve the async verifications (the order is that of
// the input slice). // the input slice).
VerifyHeaders(chain ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) VerifyHeaders(chain ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)
// VerifyUncles verifies that the given block's uncles conform to the consensus // VerifyUncles verifies that the given block's uncles conform to the consensus
// rules of a given engine. // rules of a given engine.
@ -73,18 +79,18 @@ type Engine interface {
// VerifySeal checks whether the crypto seal on a header is valid according to // VerifySeal checks whether the crypto seal on a header is valid according to
// the consensus rules of the given engine. // the consensus rules of the given engine.
VerifySeal(chain ChainReader, header *types.Header) error VerifySeal(chain ChainHeaderReader, header *types.Header) error
// Prepare initializes the consensus fields of a block header according to the // Prepare initializes the consensus fields of a block header according to the
// rules of a particular engine. The changes are executed inline. // rules of a particular engine. The changes are executed inline.
Prepare(chain ChainReader, header *types.Header) error Prepare(chain ChainHeaderReader, header *types.Header) error
// Finalize runs any post-transaction state modifications (e.g. block rewards) // Finalize runs any post-transaction state modifications (e.g. block rewards)
// but does not assemble the block. // but does not assemble the block.
// //
// Note: The block header and state database might be updated to reflect any // Note: The block header and state database might be updated to reflect any
// consensus rules that happen at finalization (e.g. block rewards). // consensus rules that happen at finalization (e.g. block rewards).
Finalize(chain ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, Finalize(chain ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,
uncles []*types.Header) uncles []*types.Header)
// FinalizeAndAssemble runs any post-transaction state modifications (e.g. block // FinalizeAndAssemble runs any post-transaction state modifications (e.g. block
@ -92,7 +98,7 @@ type Engine interface {
// //
// Note: The block header and state database might be updated to reflect any // Note: The block header and state database might be updated to reflect any
// consensus rules that happen at finalization (e.g. block rewards). // consensus rules that happen at finalization (e.g. block rewards).
FinalizeAndAssemble(chain ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, FinalizeAndAssemble(chain ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,
uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error)
// Seal generates a new sealing request for the given input block and pushes // Seal generates a new sealing request for the given input block and pushes
@ -100,17 +106,17 @@ type Engine interface {
// //
// Note, the method returns immediately and will send the result async. More // Note, the method returns immediately and will send the result async. More
// than one result may also be returned depending on the consensus algorithm. // than one result may also be returned depending on the consensus algorithm.
Seal(chain ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error Seal(chain ChainHeaderReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error
// SealHash returns the hash of a block prior to it being sealed. // SealHash returns the hash of a block prior to it being sealed.
SealHash(header *types.Header) common.Hash SealHash(header *types.Header) common.Hash
// CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty // CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty
// that a new block should have. // that a new block should have.
CalcDifficulty(chain ChainReader, time uint64, parent *types.Header) *big.Int CalcDifficulty(chain ChainHeaderReader, time uint64, parent *types.Header) *big.Int
// APIs returns the RPC APIs this consensus engine provides. // APIs returns the RPC APIs this consensus engine provides.
APIs(chain ChainReader) []rpc.API APIs(chain ChainHeaderReader) []rpc.API
// Close terminates any background threads maintained by the consensus engine. // Close terminates any background threads maintained by the consensus engine.
Close() error Close() error

20
consensus/ethash/consensus.go
View File

@ -86,7 +86,7 @@ func (ethash *Ethash) Author(header *types.Header) (common.Address, error) {
// VerifyHeader checks whether a header conforms to the consensus rules of the // VerifyHeader checks whether a header conforms to the consensus rules of the
// stock Ethereum ethash engine. // stock Ethereum ethash engine.
func (ethash *Ethash) VerifyHeader(chain consensus.ChainReader, header *types.Header, seal bool) error { func (ethash *Ethash) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error {
// If we're running a full engine faking, accept any input as valid // If we're running a full engine faking, accept any input as valid
if ethash.config.PowMode == ModeFullFake { if ethash.config.PowMode == ModeFullFake {
return nil return nil
@ -107,7 +107,7 @@ func (ethash *Ethash) VerifyHeader(chain consensus.ChainReader, header *types.He
// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers // VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
// concurrently. The method returns a quit channel to abort the operations and // concurrently. The method returns a quit channel to abort the operations and
// a results channel to retrieve the async verifications. // a results channel to retrieve the async verifications.
func (ethash *Ethash) VerifyHeaders(chain consensus.ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) { func (ethash *Ethash) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
// If we're running a full engine faking, accept any input as valid // If we're running a full engine faking, accept any input as valid
if ethash.config.PowMode == ModeFullFake || len(headers) == 0 { if ethash.config.PowMode == ModeFullFake || len(headers) == 0 {
abort, results := make(chan struct{}), make(chan error, len(headers)) abort, results := make(chan struct{}), make(chan error, len(headers))
@ -169,7 +169,7 @@ func (ethash *Ethash) VerifyHeaders(chain consensus.ChainReader, headers []*type
return abort, errorsOut return abort, errorsOut
} }
func (ethash *Ethash) verifyHeaderWorker(chain consensus.ChainReader, headers []*types.Header, seals []bool, index int) error { func (ethash *Ethash) verifyHeaderWorker(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool, index int) error {
var parent *types.Header var parent *types.Header
if index == 0 { if index == 0 {
parent = chain.GetHeader(headers[0].ParentHash, headers[0].Number.Uint64()-1) parent = chain.GetHeader(headers[0].ParentHash, headers[0].Number.Uint64()-1)
@ -243,7 +243,7 @@ func (ethash *Ethash) VerifyUncles(chain consensus.ChainReader, block *types.Blo
// verifyHeader checks whether a header conforms to the consensus rules of the // verifyHeader checks whether a header conforms to the consensus rules of the
// stock Ethereum ethash engine. // stock Ethereum ethash engine.
// See YP section 4.3.4. "Block Header Validity" // See YP section 4.3.4. "Block Header Validity"
func (ethash *Ethash) verifyHeader(chain consensus.ChainReader, header, parent *types.Header, uncle bool, seal bool) error { func (ethash *Ethash) verifyHeader(chain consensus.ChainHeaderReader, header, parent *types.Header, uncle bool, seal bool) error {
// Ensure that the header's extra-data section is of a reasonable size // Ensure that the header's extra-data section is of a reasonable size
if uint64(len(header.Extra)) > params.MaximumExtraDataSize { if uint64(len(header.Extra)) > params.MaximumExtraDataSize {
return fmt.Errorf("extra-data too long: %d > %d", len(header.Extra), params.MaximumExtraDataSize) return fmt.Errorf("extra-data too long: %d > %d", len(header.Extra), params.MaximumExtraDataSize)
@ -306,7 +306,7 @@ func (ethash *Ethash) verifyHeader(chain consensus.ChainReader, header, parent *
// CalcDifficulty is the difficulty adjustment algorithm. It returns // CalcDifficulty is the difficulty adjustment algorithm. It returns
// the difficulty that a new block should have when created at time // the difficulty that a new block should have when created at time
// given the parent block's time and difficulty. // given the parent block's time and difficulty.
func (ethash *Ethash) CalcDifficulty(chain consensus.ChainReader, time uint64, parent *types.Header) *big.Int { func (ethash *Ethash) CalcDifficulty(chain consensus.ChainHeaderReader, time uint64, parent *types.Header) *big.Int {
return CalcDifficulty(chain.Config(), time, parent) return CalcDifficulty(chain.Config(), time, parent)
} }
@ -486,14 +486,14 @@ func calcDifficultyFrontier(time uint64, parent *types.Header) *big.Int {
// VerifySeal implements consensus.Engine, checking whether the given block satisfies // VerifySeal implements consensus.Engine, checking whether the given block satisfies
// the PoW difficulty requirements. // the PoW difficulty requirements.
func (ethash *Ethash) VerifySeal(chain consensus.ChainReader, header *types.Header) error { func (ethash *Ethash) VerifySeal(chain consensus.ChainHeaderReader, header *types.Header) error {
return ethash.verifySeal(chain, header, false) return ethash.verifySeal(chain, header, false)
} }
// verifySeal checks whether a block satisfies the PoW difficulty requirements, // verifySeal checks whether a block satisfies the PoW difficulty requirements,
// either using the usual ethash cache for it, or alternatively using a full DAG // either using the usual ethash cache for it, or alternatively using a full DAG
// to make remote mining fast. // to make remote mining fast.
func (ethash *Ethash) verifySeal(chain consensus.ChainReader, header *types.Header, fulldag bool) error { func (ethash *Ethash) verifySeal(chain consensus.ChainHeaderReader, header *types.Header, fulldag bool) error {
// If we're running a fake PoW, accept any seal as valid // If we're running a fake PoW, accept any seal as valid
if ethash.config.PowMode == ModeFake || ethash.config.PowMode == ModeFullFake { if ethash.config.PowMode == ModeFake || ethash.config.PowMode == ModeFullFake {
time.Sleep(ethash.fakeDelay) time.Sleep(ethash.fakeDelay)
@ -558,7 +558,7 @@ func (ethash *Ethash) verifySeal(chain consensus.ChainReader, header *types.Head
// Prepare implements consensus.Engine, initializing the difficulty field of a // Prepare implements consensus.Engine, initializing the difficulty field of a
// header to conform to the ethash protocol. The changes are done inline. // header to conform to the ethash protocol. The changes are done inline.
func (ethash *Ethash) Prepare(chain consensus.ChainReader, header *types.Header) error { func (ethash *Ethash) Prepare(chain consensus.ChainHeaderReader, header *types.Header) error {
parent := chain.GetHeader(header.ParentHash, header.Number.Uint64()-1) parent := chain.GetHeader(header.ParentHash, header.Number.Uint64()-1)
if parent == nil { if parent == nil {
return consensus.ErrUnknownAncestor return consensus.ErrUnknownAncestor
@ -569,7 +569,7 @@ func (ethash *Ethash) Prepare(chain consensus.ChainReader, header *types.Header)
// Finalize implements consensus.Engine, accumulating the block and uncle rewards, // Finalize implements consensus.Engine, accumulating the block and uncle rewards,
// setting the final state on the header // setting the final state on the header
func (ethash *Ethash) Finalize(chain consensus.ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header) { func (ethash *Ethash) Finalize(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header) {
// Accumulate any block and uncle rewards and commit the final state root // Accumulate any block and uncle rewards and commit the final state root
accumulateRewards(chain.Config(), state, header, uncles) accumulateRewards(chain.Config(), state, header, uncles)
header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number)) header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number))
@ -577,7 +577,7 @@ func (ethash *Ethash) Finalize(chain consensus.ChainReader, header *types.Header
// FinalizeAndAssemble implements consensus.Engine, accumulating the block and // FinalizeAndAssemble implements consensus.Engine, accumulating the block and
// uncle rewards, setting the final state and assembling the block. // uncle rewards, setting the final state and assembling the block.
func (ethash *Ethash) FinalizeAndAssemble(chain consensus.ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) { func (ethash *Ethash) FinalizeAndAssemble(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) {
// Accumulate any block and uncle rewards and commit the final state root // Accumulate any block and uncle rewards and commit the final state root
accumulateRewards(chain.Config(), state, header, uncles) accumulateRewards(chain.Config(), state, header, uncles)
header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number)) header.Root = state.IntermediateRoot(chain.Config().IsEIP158(header.Number))

2
consensus/ethash/ethash.go
View File

@ -656,7 +656,7 @@ func (ethash *Ethash) Hashrate() float64 {
} }
// APIs implements consensus.Engine, returning the user facing RPC APIs. // APIs implements consensus.Engine, returning the user facing RPC APIs.
func (ethash *Ethash) APIs(chain consensus.ChainReader) []rpc.API { func (ethash *Ethash) APIs(chain consensus.ChainHeaderReader) []rpc.API {
// In order to ensure backward compatibility, we exposes ethash RPC APIs // In order to ensure backward compatibility, we exposes ethash RPC APIs
// to both eth and ethash namespaces. // to both eth and ethash namespaces.
return []rpc.API{ return []rpc.API{

2
consensus/ethash/sealer.go
View File

@ -48,7 +48,7 @@ var (
// Seal implements consensus.Engine, attempting to find a nonce that satisfies // Seal implements consensus.Engine, attempting to find a nonce that satisfies
// the block's difficulty requirements. // the block's difficulty requirements.
func (ethash *Ethash) Seal(chain consensus.ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error { func (ethash *Ethash) Seal(chain consensus.ChainHeaderReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error {
// If we're running a fake PoW, simply return a 0 nonce immediately // If we're running a fake PoW, simply return a 0 nonce immediately
if ethash.config.PowMode == ModeFake || ethash.config.PowMode == ModeFullFake { if ethash.config.PowMode == ModeFake || ethash.config.PowMode == ModeFullFake {
header := block.Header() header := block.Header()

194
eth/fetcher/block_fetcher.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License // You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package fetcher contains the announcement based blocks or transaction synchronisation. // Package fetcher contains the announcement based header, blocks or transaction synchronisation.
package fetcher package fetcher
import ( import (
@ -31,6 +31,7 @@ import (
) )
const ( const (
lightTimeout = time.Millisecond // Time allowance before an announced header is explicitly requested
arriveTimeout = 500 * time.Millisecond // Time allowance before an announced block/transaction is explicitly requested arriveTimeout = 500 * time.Millisecond // Time allowance before an announced block/transaction is explicitly requested
gatherSlack = 100 * time.Millisecond // Interval used to collate almost-expired announces with fetches gatherSlack = 100 * time.Millisecond // Interval used to collate almost-expired announces with fetches
fetchTimeout = 5 * time.Second // Maximum allotted time to return an explicitly requested block/transaction fetchTimeout = 5 * time.Second // Maximum allotted time to return an explicitly requested block/transaction
@ -39,7 +40,7 @@ const (
const ( const (
maxUncleDist = 7 // Maximum allowed backward distance from the chain head maxUncleDist = 7 // Maximum allowed backward distance from the chain head
maxQueueDist = 32 // Maximum allowed distance from the chain head to queue maxQueueDist = 32 // Maximum allowed distance from the chain head to queue
hashLimit = 256 // Maximum number of unique blocks a peer may have announced hashLimit = 256 // Maximum number of unique blocks or headers a peer may have announced
blockLimit = 64 // Maximum number of unique blocks a peer may have delivered blockLimit = 64 // Maximum number of unique blocks a peer may have delivered
) )
@ -63,9 +64,10 @@ var (
bodyFilterOutMeter = metrics.NewRegisteredMeter("eth/fetcher/block/filter/bodies/out", nil) bodyFilterOutMeter = metrics.NewRegisteredMeter("eth/fetcher/block/filter/bodies/out", nil)
) )
var ( var errTerminated = errors.New("terminated")
errTerminated = errors.New("terminated")
) // HeaderRetrievalFn is a callback type for retrieving a header from the local chain.
type HeaderRetrievalFn func(common.Hash) *types.Header
// blockRetrievalFn is a callback type for retrieving a block from the local chain. // blockRetrievalFn is a callback type for retrieving a block from the local chain.
type blockRetrievalFn func(common.Hash) *types.Block type blockRetrievalFn func(common.Hash) *types.Block
@ -85,6 +87,9 @@ type blockBroadcasterFn func(block *types.Block, propagate bool)
// chainHeightFn is a callback type to retrieve the current chain height. // chainHeightFn is a callback type to retrieve the current chain height.
type chainHeightFn func() uint64 type chainHeightFn func() uint64
// headersInsertFn is a callback type to insert a batch of headers into the local chain.
type headersInsertFn func(headers []*types.Header) (int, error)
// chainInsertFn is a callback type to insert a batch of blocks into the local chain. // chainInsertFn is a callback type to insert a batch of blocks into the local chain.
type chainInsertFn func(types.Blocks) (int, error) type chainInsertFn func(types.Blocks) (int, error)
@ -121,18 +126,38 @@ type bodyFilterTask struct {
time time.Time // Arrival time of the blocks' contents time time.Time // Arrival time of the blocks' contents
} }
// blockInject represents a schedules import operation. // blockOrHeaderInject represents a schedules import operation.
type blockInject struct { type blockOrHeaderInject struct {
origin string origin string
block *types.Block
header *types.Header // Used for light mode fetcher which only cares about header.
block *types.Block // Used for normal mode fetcher which imports full block.
}
// number returns the block number of the injected object.
func (inject *blockOrHeaderInject) number() uint64 {
if inject.header != nil {
return inject.header.Number.Uint64()
}
return inject.block.NumberU64()
}
// number returns the block hash of the injected object.
func (inject *blockOrHeaderInject) hash() common.Hash {
if inject.header != nil {
return inject.header.Hash()
}
return inject.block.Hash()
} }
// BlockFetcher is responsible for accumulating block announcements from various peers // BlockFetcher is responsible for accumulating block announcements from various peers
// and scheduling them for retrieval. // and scheduling them for retrieval.
type BlockFetcher struct { type BlockFetcher struct {
light bool // The indicator whether it's a light fetcher or normal one.
// Various event channels // Various event channels
notify chan *blockAnnounce notify chan *blockAnnounce
inject chan *blockInject inject chan *blockOrHeaderInject
headerFilter chan chan *headerFilterTask headerFilter chan chan *headerFilterTask
bodyFilter chan chan *bodyFilterTask bodyFilter chan chan *bodyFilterTask
@ -150,13 +175,15 @@ type BlockFetcher struct {
// Block cache // Block cache
queue *prque.Prque // Queue containing the import operations (block number sorted) queue *prque.Prque // Queue containing the import operations (block number sorted)
queues map[string]int // Per peer block counts to prevent memory exhaustion queues map[string]int // Per peer block counts to prevent memory exhaustion
queued map[common.Hash]*blockInject // Set of already queued blocks (to dedupe imports) queued map[common.Hash]*blockOrHeaderInject // Set of already queued blocks (to dedup imports)
// Callbacks // Callbacks
getHeader HeaderRetrievalFn // Retrieves a header from the local chain
getBlock blockRetrievalFn // Retrieves a block from the local chain getBlock blockRetrievalFn // Retrieves a block from the local chain
verifyHeader headerVerifierFn // Checks if a block's headers have a valid proof of work verifyHeader headerVerifierFn // Checks if a block's headers have a valid proof of work
broadcastBlock blockBroadcasterFn // Broadcasts a block to connected peers broadcastBlock blockBroadcasterFn // Broadcasts a block to connected peers
chainHeight chainHeightFn // Retrieves the current chain's height chainHeight chainHeightFn // Retrieves the current chain's height
insertHeaders headersInsertFn // Injects a batch of headers into the chain
insertChain chainInsertFn // Injects a batch of blocks into the chain insertChain chainInsertFn // Injects a batch of blocks into the chain
dropPeer peerDropFn // Drops a peer for misbehaving dropPeer peerDropFn // Drops a peer for misbehaving
@ -165,14 +192,15 @@ type BlockFetcher struct {
queueChangeHook func(common.Hash, bool) // Method to call upon adding or deleting a block from the import queue queueChangeHook func(common.Hash, bool) // Method to call upon adding or deleting a block from the import queue
fetchingHook func([]common.Hash) // Method to call upon starting a block (eth/61) or header (eth/62) fetch fetchingHook func([]common.Hash) // Method to call upon starting a block (eth/61) or header (eth/62) fetch
completingHook func([]common.Hash) // Method to call upon starting a block body fetch (eth/62) completingHook func([]common.Hash) // Method to call upon starting a block body fetch (eth/62)
importedHook func(*types.Block) // Method to call upon successful block import (both eth/61 and eth/62) importedHook func(*types.Header, *types.Block) // Method to call upon successful header or block import (both eth/61 and eth/62)
} }
// NewBlockFetcher creates a block fetcher to retrieve blocks based on hash announcements. // NewBlockFetcher creates a block fetcher to retrieve blocks based on hash announcements.
func NewBlockFetcher(getBlock blockRetrievalFn, verifyHeader headerVerifierFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *BlockFetcher { func NewBlockFetcher(light bool, getHeader HeaderRetrievalFn, getBlock blockRetrievalFn, verifyHeader headerVerifierFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertHeaders headersInsertFn, insertChain chainInsertFn, dropPeer peerDropFn) *BlockFetcher {
return &BlockFetcher{ return &BlockFetcher{
light: light,
notify: make(chan *blockAnnounce), notify: make(chan *blockAnnounce),
inject: make(chan *blockInject), inject: make(chan *blockOrHeaderInject),
headerFilter: make(chan chan *headerFilterTask), headerFilter: make(chan chan *headerFilterTask),
bodyFilter: make(chan chan *bodyFilterTask), bodyFilter: make(chan chan *bodyFilterTask),
done: make(chan common.Hash), done: make(chan common.Hash),
@ -184,11 +212,13 @@ func NewBlockFetcher(getBlock blockRetrievalFn, verifyHeader headerVerifierFn, b
completing: make(map[common.Hash]*blockAnnounce), completing: make(map[common.Hash]*blockAnnounce),
queue: prque.New(nil), queue: prque.New(nil),
queues: make(map[string]int), queues: make(map[string]int),
queued: make(map[common.Hash]*blockInject), queued: make(map[common.Hash]*blockOrHeaderInject),
getHeader: getHeader,
getBlock: getBlock, getBlock: getBlock,
verifyHeader: verifyHeader, verifyHeader: verifyHeader,
broadcastBlock: broadcastBlock, broadcastBlock: broadcastBlock,
chainHeight: chainHeight, chainHeight: chainHeight,
insertHeaders: insertHeaders,
insertChain: insertChain, insertChain: insertChain,
dropPeer: dropPeer, dropPeer: dropPeer,
} }
@ -228,7 +258,7 @@ func (f *BlockFetcher) Notify(peer string, hash common.Hash, number uint64, time
// Enqueue tries to fill gaps the fetcher's future import queue. // Enqueue tries to fill gaps the fetcher's future import queue.
func (f *BlockFetcher) Enqueue(peer string, block *types.Block) error { func (f *BlockFetcher) Enqueue(peer string, block *types.Block) error {
op := &blockInject{ op := &blockOrHeaderInject{
origin: peer, origin: peer,
block: block, block: block,
} }
@ -315,13 +345,13 @@ func (f *BlockFetcher) loop() {
// Import any queued blocks that could potentially fit // Import any queued blocks that could potentially fit
height := f.chainHeight() height := f.chainHeight()
for !f.queue.Empty() { for !f.queue.Empty() {
op := f.queue.PopItem().(*blockInject) op := f.queue.PopItem().(*blockOrHeaderInject)
hash := op.block.Hash() hash := op.hash()
if f.queueChangeHook != nil { if f.queueChangeHook != nil {
f.queueChangeHook(hash, false) f.queueChangeHook(hash, false)
} }
// If too high up the chain or phase, continue later // If too high up the chain or phase, continue later
number := op.block.NumberU64() number := op.number()
if number > height+1 { if number > height+1 {
f.queue.Push(op, -int64(number)) f.queue.Push(op, -int64(number))
if f.queueChangeHook != nil { if f.queueChangeHook != nil {
@ -330,11 +360,15 @@ func (f *BlockFetcher) loop() {
break break
} }
// Otherwise if fresh and still unknown, try and import // Otherwise if fresh and still unknown, try and import
if number+maxUncleDist < height || f.getBlock(hash) != nil { if (number+maxUncleDist < height) || (f.light && f.getHeader(hash) != nil) || (!f.light && f.getBlock(hash) != nil) {
f.forgetBlock(hash) f.forgetBlock(hash)
continue continue
} }
f.insert(op.origin, op.block) if f.light {
f.importHeaders(op.origin, op.header)
} else {
f.importBlocks(op.origin, op.block)
}
} }
// Wait for an outside event to occur // Wait for an outside event to occur
select { select {
@ -379,7 +413,13 @@ func (f *BlockFetcher) loop() {
case op := <-f.inject: case op := <-f.inject:
// A direct block insertion was requested, try and fill any pending gaps // A direct block insertion was requested, try and fill any pending gaps
blockBroadcastInMeter.Mark(1) blockBroadcastInMeter.Mark(1)
f.enqueue(op.origin, op.block)
// Now only direct block injection is allowed, drop the header injection
// here silently if we receive.
if f.light {
continue
}
f.enqueue(op.origin, nil, op.block)
case hash := <-f.done: case hash := <-f.done:
// A pending import finished, remove all traces of the notification // A pending import finished, remove all traces of the notification
@ -391,13 +431,19 @@ func (f *BlockFetcher) loop() {
request := make(map[string][]common.Hash) request := make(map[string][]common.Hash)
for hash, announces := range f.announced { for hash, announces := range f.announced {
if time.Since(announces[0].time) > arriveTimeout-gatherSlack { // In current LES protocol(les2/les3), only header announce is
// available, no need to wait too much time for header broadcast.
timeout := arriveTimeout - gatherSlack
if f.light {
timeout = 0
}
if time.Since(announces[0].time) > timeout {
// Pick a random peer to retrieve from, reset all others // Pick a random peer to retrieve from, reset all others
announce := announces[rand.Intn(len(announces))] announce := announces[rand.Intn(len(announces))]
f.forgetHash(hash) f.forgetHash(hash)
// If the block still didn't arrive, queue for fetching // If the block still didn't arrive, queue for fetching
if f.getBlock(hash) == nil { if (f.light && f.getHeader(hash) == nil) || (!f.light && f.getBlock(hash) == nil) {
request[announce.origin] = append(request[announce.origin], hash) request[announce.origin] = append(request[announce.origin], hash)
f.fetching[hash] = announce f.fetching[hash] = announce
} }
@ -465,7 +511,7 @@ func (f *BlockFetcher) loop() {
// Split the batch of headers into unknown ones (to return to the caller), // Split the batch of headers into unknown ones (to return to the caller),
// known incomplete ones (requiring body retrievals) and completed blocks. // known incomplete ones (requiring body retrievals) and completed blocks.
unknown, incomplete, complete := []*types.Header{}, []*blockAnnounce{}, []*types.Block{} unknown, incomplete, complete, lightHeaders := []*types.Header{}, []*blockAnnounce{}, []*types.Block{}, []*blockAnnounce{}
for _, header := range task.headers { for _, header := range task.headers {
hash := header.Hash() hash := header.Hash()
@ -478,6 +524,16 @@ func (f *BlockFetcher) loop() {
f.forgetHash(hash) f.forgetHash(hash)
continue continue
} }
// Collect all headers only if we are running in light
// mode and the headers are not imported by other means.
if f.light {
if f.getHeader(hash) == nil {
announce.header = header
lightHeaders = append(lightHeaders, announce)
}
f.forgetHash(hash)
continue
}
// Only keep if not imported by other means // Only keep if not imported by other means
if f.getBlock(hash) == nil { if f.getBlock(hash) == nil {
announce.header = header announce.header = header
@ -522,10 +578,14 @@ func (f *BlockFetcher) loop() {
f.rescheduleComplete(completeTimer) f.rescheduleComplete(completeTimer)
} }
} }
// Schedule the header for light fetcher import
for _, announce := range lightHeaders {
f.enqueue(announce.origin, announce.header, nil)
}
// Schedule the header-only blocks for import // Schedule the header-only blocks for import
for _, block := range complete { for _, block := range complete {
if announce := f.completing[block.Hash()]; announce != nil { if announce := f.completing[block.Hash()]; announce != nil {
f.enqueue(announce.origin, block) f.enqueue(announce.origin, nil, block)
} }
} }
@ -592,7 +652,7 @@ func (f *BlockFetcher) loop() {
// Schedule the retrieved blocks for ordered import // Schedule the retrieved blocks for ordered import
for _, block := range blocks { for _, block := range blocks {
if announce := f.completing[block.Hash()]; announce != nil { if announce := f.completing[block.Hash()]; announce != nil {
f.enqueue(announce.origin, block) f.enqueue(announce.origin, nil, block)
} }
} }
} }
@ -605,6 +665,12 @@ func (f *BlockFetcher) rescheduleFetch(fetch *time.Timer) {
if len(f.announced) == 0 { if len(f.announced) == 0 {
return return
} }
// Schedule announcement retrieval quickly for light mode
// since server won't send any headers to client.
if f.light {
fetch.Reset(lightTimeout)
return
}
// Otherwise find the earliest expiring announcement // Otherwise find the earliest expiring announcement
earliest := time.Now() earliest := time.Now()
for _, announces := range f.announced { for _, announces := range f.announced {
@ -631,46 +697,88 @@ func (f *BlockFetcher) rescheduleComplete(complete *time.Timer) {
complete.Reset(gatherSlack - time.Since(earliest)) complete.Reset(gatherSlack - time.Since(earliest))
} }
// enqueue schedules a new future import operation, if the block to be imported // enqueue schedules a new header or block import operation, if the component
// has not yet been seen. // to be imported has not yet been seen.
func (f *BlockFetcher) enqueue(peer string, block *types.Block) { func (f *BlockFetcher) enqueue(peer string, header *types.Header, block *types.Block) {
hash := block.Hash() var (
hash common.Hash
number uint64
)
if header != nil {
hash, number = header.Hash(), header.Number.Uint64()
} else {
hash, number = block.Hash(), block.NumberU64()
}
// Ensure the peer isn't DOSing us // Ensure the peer isn't DOSing us
count := f.queues[peer] + 1 count := f.queues[peer] + 1
if count > blockLimit { if count > blockLimit {
log.Debug("Discarded propagated block, exceeded allowance", "peer", peer, "number", block.Number(), "hash", hash, "limit", blockLimit) log.Debug("Discarded delivered header or block, exceeded allowance", "peer", peer, "number", number, "hash", hash, "limit", blockLimit)
blockBroadcastDOSMeter.Mark(1) blockBroadcastDOSMeter.Mark(1)
f.forgetHash(hash) f.forgetHash(hash)
return return
} }
// Discard any past or too distant blocks // Discard any past or too distant blocks
if dist := int64(block.NumberU64()) - int64(f.chainHeight()); dist < -maxUncleDist || dist > maxQueueDist { if dist := int64(number) - int64(f.chainHeight()); dist < -maxUncleDist || dist > maxQueueDist {
log.Debug("Discarded propagated block, too far away", "peer", peer, "number", block.Number(), "hash", hash, "distance", dist) log.Debug("Discarded delivered header or block, too far away", "peer", peer, "number", number, "hash", hash, "distance", dist)
blockBroadcastDropMeter.Mark(1) blockBroadcastDropMeter.Mark(1)
f.forgetHash(hash) f.forgetHash(hash)
return return
} }
// Schedule the block for future importing // Schedule the block for future importing
if _, ok := f.queued[hash]; !ok { if _, ok := f.queued[hash]; !ok {
op := &blockInject{ op := &blockOrHeaderInject{origin: peer}
origin: peer, if header != nil {
block: block, op.header = header
} else {
op.block = block
} }
f.queues[peer] = count f.queues[peer] = count
f.queued[hash] = op f.queued[hash] = op
f.queue.Push(op, -int64(block.NumberU64())) f.queue.Push(op, -int64(number))
if f.queueChangeHook != nil { if f.queueChangeHook != nil {
f.queueChangeHook(op.block.Hash(), true) f.queueChangeHook(hash, true)
} }
log.Debug("Queued propagated block", "peer", peer, "number", block.Number(), "hash", hash, "queued", f.queue.Size()) log.Debug("Queued delivered header or block", "peer", peer, "number", number, "hash", hash, "queued", f.queue.Size())
} }
} }
// insert spawns a new goroutine to run a block insertion into the chain. If the // importHeaders spawns a new goroutine to run a header insertion into the chain.
// If the header's number is at the same height as the current import phase, it
// updates the phase states accordingly.
func (f *BlockFetcher) importHeaders(peer string, header *types.Header) {
hash := header.Hash()
log.Debug("Importing propagated header", "peer", peer, "number", header.Number, "hash", hash)
go func() {
defer func() { f.done <- hash }()
// If the parent's unknown, abort insertion
parent := f.getHeader(header.ParentHash)
if parent == nil {
log.Debug("Unknown parent of propagated header", "peer", peer, "number", header.Number, "hash", hash, "parent", header.ParentHash)
return
}
// Validate the header and if something went wrong, drop the peer
if err := f.verifyHeader(header); err != nil && err != consensus.ErrFutureBlock {
log.Debug("Propagated header verification failed", "peer", peer, "number", header.Number, "hash", hash, "err", err)
f.dropPeer(peer)
return
}
// Run the actual import and log any issues
if _, err := f.insertHeaders([]*types.Header{header}); err != nil {
log.Debug("Propagated header import failed", "peer", peer, "number", header.Number, "hash", hash, "err", err)
return
}
// Invoke the testing hook if needed
if f.importedHook != nil {
f.importedHook(header, nil)
}
}()
}
// importBlocks spawns a new goroutine to run a block insertion into the chain. If the
// block's number is at the same height as the current import phase, it updates // block's number is at the same height as the current import phase, it updates
// the phase states accordingly. // the phase states accordingly.
func (f *BlockFetcher) insert(peer string, block *types.Block) { func (f *BlockFetcher) importBlocks(peer string, block *types.Block) {
hash := block.Hash() hash := block.Hash()
// Run the import on a new thread // Run the import on a new thread
@ -711,7 +819,7 @@ func (f *BlockFetcher) insert(peer string, block *types.Block) {
// Invoke the testing hook if needed // Invoke the testing hook if needed
if f.importedHook != nil { if f.importedHook != nil {
f.importedHook(block) f.importedHook(nil, block)
} }
}() }()
} }

284
eth/fetcher/block_fetcher_test.go
View File

@ -79,6 +79,7 @@ type fetcherTester struct {
fetcher *BlockFetcher fetcher *BlockFetcher
hashes []common.Hash // Hash chain belonging to the tester hashes []common.Hash // Hash chain belonging to the tester
headers map[common.Hash]*types.Header // Headers belonging to the tester
blocks map[common.Hash]*types.Block // Blocks belonging to the tester blocks map[common.Hash]*types.Block // Blocks belonging to the tester
drops map[string]bool // Map of peers dropped by the fetcher drops map[string]bool // Map of peers dropped by the fetcher
@ -86,18 +87,27 @@ type fetcherTester struct {
} }
// newTester creates a new fetcher test mocker. // newTester creates a new fetcher test mocker.
func newTester() *fetcherTester { func newTester(light bool) *fetcherTester {
tester := &fetcherTester{ tester := &fetcherTester{
hashes: []common.Hash{genesis.Hash()}, hashes: []common.Hash{genesis.Hash()},
headers: map[common.Hash]*types.Header{genesis.Hash(): genesis.Header()},
blocks: map[common.Hash]*types.Block{genesis.Hash(): genesis}, blocks: map[common.Hash]*types.Block{genesis.Hash(): genesis},
drops: make(map[string]bool), drops: make(map[string]bool),
} }
tester.fetcher = NewBlockFetcher(tester.getBlock, tester.verifyHeader, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer) tester.fetcher = NewBlockFetcher(light, tester.getHeader, tester.getBlock, tester.verifyHeader, tester.broadcastBlock, tester.chainHeight, tester.insertHeaders, tester.insertChain, tester.dropPeer)
tester.fetcher.Start() tester.fetcher.Start()
return tester return tester
} }
// getHeader retrieves a header from the tester's block chain.
func (f *fetcherTester) getHeader(hash common.Hash) *types.Header {
f.lock.RLock()
defer f.lock.RUnlock()
return f.headers[hash]
}
// getBlock retrieves a block from the tester's block chain. // getBlock retrieves a block from the tester's block chain.
func (f *fetcherTester) getBlock(hash common.Hash) *types.Block { func (f *fetcherTester) getBlock(hash common.Hash) *types.Block {
f.lock.RLock() f.lock.RLock()
@ -120,9 +130,33 @@ func (f *fetcherTester) chainHeight() uint64 {
f.lock.RLock() f.lock.RLock()
defer f.lock.RUnlock() defer f.lock.RUnlock()
if f.fetcher.light {
return f.headers[f.hashes[len(f.hashes)-1]].Number.Uint64()
}
return f.blocks[f.hashes[len(f.hashes)-1]].NumberU64() return f.blocks[f.hashes[len(f.hashes)-1]].NumberU64()
} }
// insertChain injects a new headers into the simulated chain.
func (f *fetcherTester) insertHeaders(headers []*types.Header) (int, error) {
f.lock.Lock()
defer f.lock.Unlock()
for i, header := range headers {
// Make sure the parent in known
if _, ok := f.headers[header.ParentHash]; !ok {
return i, errors.New("unknown parent")
}
// Discard any new blocks if the same height already exists
if header.Number.Uint64() <= f.headers[f.hashes[len(f.hashes)-1]].Number.Uint64() {
return i, nil
}
// Otherwise build our current chain
f.hashes = append(f.hashes, header.Hash())
f.headers[header.Hash()] = header
}
return 0, nil
}
// insertChain injects a new blocks into the simulated chain. // insertChain injects a new blocks into the simulated chain.
func (f *fetcherTester) insertChain(blocks types.Blocks) (int, error) { func (f *fetcherTester) insertChain(blocks types.Blocks) (int, error) {
f.lock.Lock() f.lock.Lock()
@ -233,7 +267,7 @@ func verifyCompletingEvent(t *testing.T, completing chan []common.Hash, arrive b
} }
// verifyImportEvent verifies that one single event arrive on an import channel. // verifyImportEvent verifies that one single event arrive on an import channel.
func verifyImportEvent(t *testing.T, imported chan *types.Block, arrive bool) { func verifyImportEvent(t *testing.T, imported chan interface{}, arrive bool) {
if arrive { if arrive {
select { select {
case <-imported: case <-imported:
@ -251,7 +285,7 @@ func verifyImportEvent(t *testing.T, imported chan *types.Block, arrive bool) {
// verifyImportCount verifies that exactly count number of events arrive on an // verifyImportCount verifies that exactly count number of events arrive on an
// import hook channel. // import hook channel.
func verifyImportCount(t *testing.T, imported chan *types.Block, count int) { func verifyImportCount(t *testing.T, imported chan interface{}, count int) {
for i := 0; i < count; i++ { for i := 0; i < count; i++ {
select { select {
case <-imported: case <-imported:
@ -263,7 +297,7 @@ func verifyImportCount(t *testing.T, imported chan *types.Block, count int) {
} }
// verifyImportDone verifies that no more events are arriving on an import channel. // verifyImportDone verifies that no more events are arriving on an import channel.
func verifyImportDone(t *testing.T, imported chan *types.Block) { func verifyImportDone(t *testing.T, imported chan interface{}) {
select { select {
case <-imported: case <-imported:
t.Fatalf("extra block imported") t.Fatalf("extra block imported")
@ -271,45 +305,62 @@ func verifyImportDone(t *testing.T, imported chan *types.Block) {
} }
} }
// Tests that a fetcher accepts block announcements and initiates retrievals for // verifyChainHeight verifies the chain height is as expected.
// them, successfully importing into the local chain. func verifyChainHeight(t *testing.T, fetcher *fetcherTester, height uint64) {
func TestSequentialAnnouncements62(t *testing.T) { testSequentialAnnouncements(t, 62) } if fetcher.chainHeight() != height {
func TestSequentialAnnouncements63(t *testing.T) { testSequentialAnnouncements(t, 63) } t.Fatalf("chain height mismatch, got %d, want %d", fetcher.chainHeight(), height)
func TestSequentialAnnouncements64(t *testing.T) { testSequentialAnnouncements(t, 64) } }
}
func testSequentialAnnouncements(t *testing.T, protocol int) { // Tests that a fetcher accepts block/header announcements and initiates retrievals
// for them, successfully importing into the local chain.
func TestFullSequentialAnnouncements(t *testing.T) { testSequentialAnnouncements(t, false) }
func TestLightSequentialAnnouncements(t *testing.T) { testSequentialAnnouncements(t, true) }
func testSequentialAnnouncements(t *testing.T, light bool) {
// Create a chain of blocks to import // Create a chain of blocks to import
targetBlocks := 4 * hashLimit targetBlocks := 4 * hashLimit
hashes, blocks := makeChain(targetBlocks, 0, genesis) hashes, blocks := makeChain(targetBlocks, 0, genesis)
tester := newTester() tester := newTester(light)
headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack) headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack)
bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0) bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0)
// Iteratively announce blocks until all are imported // Iteratively announce blocks until all are imported
imported := make(chan *types.Block) imported := make(chan interface{})
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) {
if light {
if header == nil {
t.Fatalf("Fetcher try to import empty header")
}
imported <- header
} else {
if block == nil {
t.Fatalf("Fetcher try to import empty block")
}
imported <- block
}
}
for i := len(hashes) - 2; i >= 0; i-- { for i := len(hashes) - 2; i >= 0; i-- {
tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher) tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
verifyImportEvent(t, imported, true) verifyImportEvent(t, imported, true)
} }
verifyImportDone(t, imported) verifyImportDone(t, imported)
verifyChainHeight(t, tester, uint64(len(hashes)-1))
} }
// Tests that if blocks are announced by multiple peers (or even the same buggy // Tests that if blocks are announced by multiple peers (or even the same buggy
// peer), they will only get downloaded at most once. // peer), they will only get downloaded at most once.
func TestConcurrentAnnouncements62(t *testing.T) { testConcurrentAnnouncements(t, 62) } func TestFullConcurrentAnnouncements(t *testing.T) { testConcurrentAnnouncements(t, false) }
func TestConcurrentAnnouncements63(t *testing.T) { testConcurrentAnnouncements(t, 63) } func TestLightConcurrentAnnouncements(t *testing.T) { testConcurrentAnnouncements(t, true) }
func TestConcurrentAnnouncements64(t *testing.T) { testConcurrentAnnouncements(t, 64) }
func testConcurrentAnnouncements(t *testing.T, protocol int) { func testConcurrentAnnouncements(t *testing.T, light bool) {
// Create a chain of blocks to import // Create a chain of blocks to import
targetBlocks := 4 * hashLimit targetBlocks := 4 * hashLimit
hashes, blocks := makeChain(targetBlocks, 0, genesis) hashes, blocks := makeChain(targetBlocks, 0, genesis)
// Assemble a tester with a built in counter for the requests // Assemble a tester with a built in counter for the requests
tester := newTester() tester := newTester(light)
firstHeaderFetcher := tester.makeHeaderFetcher("first", blocks, -gatherSlack) firstHeaderFetcher := tester.makeHeaderFetcher("first", blocks, -gatherSlack)
firstBodyFetcher := tester.makeBodyFetcher("first", blocks, 0) firstBodyFetcher := tester.makeBodyFetcher("first", blocks, 0)
secondHeaderFetcher := tester.makeHeaderFetcher("second", blocks, -gatherSlack) secondHeaderFetcher := tester.makeHeaderFetcher("second", blocks, -gatherSlack)
@ -325,9 +376,20 @@ func testConcurrentAnnouncements(t *testing.T, protocol int) {
return secondHeaderFetcher(hash) return secondHeaderFetcher(hash)
} }
// Iteratively announce blocks until all are imported // Iteratively announce blocks until all are imported
imported := make(chan *types.Block) imported := make(chan interface{})
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) {
if light {
if header == nil {
t.Fatalf("Fetcher try to import empty header")
}
imported <- header
} else {
if block == nil {
t.Fatalf("Fetcher try to import empty block")
}
imported <- block
}
}
for i := len(hashes) - 2; i >= 0; i-- { for i := len(hashes) - 2; i >= 0; i-- {
tester.fetcher.Notify("first", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), firstHeaderWrapper, firstBodyFetcher) tester.fetcher.Notify("first", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), firstHeaderWrapper, firstBodyFetcher)
tester.fetcher.Notify("second", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout+time.Millisecond), secondHeaderWrapper, secondBodyFetcher) tester.fetcher.Notify("second", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout+time.Millisecond), secondHeaderWrapper, secondBodyFetcher)
@ -340,30 +402,42 @@ func testConcurrentAnnouncements(t *testing.T, protocol int) {
if int(counter) != targetBlocks { if int(counter) != targetBlocks {
t.Fatalf("retrieval count mismatch: have %v, want %v", counter, targetBlocks) t.Fatalf("retrieval count mismatch: have %v, want %v", counter, targetBlocks)
} }
verifyChainHeight(t, tester, uint64(len(hashes)-1))
} }
// Tests that announcements arriving while a previous is being fetched still // Tests that announcements arriving while a previous is being fetched still
// results in a valid import. // results in a valid import.
func TestOverlappingAnnouncements62(t *testing.T) { testOverlappingAnnouncements(t, 62) } func TestFullOverlappingAnnouncements(t *testing.T) { testOverlappingAnnouncements(t, false) }
func TestOverlappingAnnouncements63(t *testing.T) { testOverlappingAnnouncements(t, 63) } func TestLightOverlappingAnnouncements(t *testing.T) { testOverlappingAnnouncements(t, true) }
func TestOverlappingAnnouncements64(t *testing.T) { testOverlappingAnnouncements(t, 64) }
func testOverlappingAnnouncements(t *testing.T, protocol int) { func testOverlappingAnnouncements(t *testing.T, light bool) {
// Create a chain of blocks to import // Create a chain of blocks to import
targetBlocks := 4 * hashLimit targetBlocks := 4 * hashLimit
hashes, blocks := makeChain(targetBlocks, 0, genesis) hashes, blocks := makeChain(targetBlocks, 0, genesis)
tester := newTester() tester := newTester(light)
headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack) headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack)
bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0) bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0)
// Iteratively announce blocks, but overlap them continuously // Iteratively announce blocks, but overlap them continuously
overlap := 16 overlap := 16
imported := make(chan *types.Block, len(hashes)-1) imported := make(chan interface{}, len(hashes)-1)
for i := 0; i < overlap; i++ { for i := 0; i < overlap; i++ {
imported <- nil imported <- nil
} }
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) {
if light {
if header == nil {
t.Fatalf("Fetcher try to import empty header")
}
imported <- header
} else {
if block == nil {
t.Fatalf("Fetcher try to import empty block")
}
imported <- block
}
}
for i := len(hashes) - 2; i >= 0; i-- { for i := len(hashes) - 2; i >= 0; i-- {
tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher) tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
@ -375,19 +449,19 @@ func testOverlappingAnnouncements(t *testing.T, protocol int) {
} }
// Wait for all the imports to complete and check count // Wait for all the imports to complete and check count
verifyImportCount(t, imported, overlap) verifyImportCount(t, imported, overlap)
verifyChainHeight(t, tester, uint64(len(hashes)-1))
} }
// Tests that announces already being retrieved will not be duplicated. // Tests that announces already being retrieved will not be duplicated.
func TestPendingDeduplication62(t *testing.T) { testPendingDeduplication(t, 62) } func TestFullPendingDeduplication(t *testing.T) { testPendingDeduplication(t, false) }
func TestPendingDeduplication63(t *testing.T) { testPendingDeduplication(t, 63) } func TestLightPendingDeduplication(t *testing.T) { testPendingDeduplication(t, true) }
func TestPendingDeduplication64(t *testing.T) { testPendingDeduplication(t, 64) }
func testPendingDeduplication(t *testing.T, protocol int) { func testPendingDeduplication(t *testing.T, light bool) {
// Create a hash and corresponding block // Create a hash and corresponding block
hashes, blocks := makeChain(1, 0, genesis) hashes, blocks := makeChain(1, 0, genesis)
// Assemble a tester with a built in counter and delayed fetcher // Assemble a tester with a built in counter and delayed fetcher
tester := newTester() tester := newTester(light)
headerFetcher := tester.makeHeaderFetcher("repeater", blocks, -gatherSlack) headerFetcher := tester.makeHeaderFetcher("repeater", blocks, -gatherSlack)
bodyFetcher := tester.makeBodyFetcher("repeater", blocks, 0) bodyFetcher := tester.makeBodyFetcher("repeater", blocks, 0)
@ -403,42 +477,58 @@ func testPendingDeduplication(t *testing.T, protocol int) {
}() }()
return nil return nil
} }
checkNonExist := func() bool {
return tester.getBlock(hashes[0]) == nil
}
if light {
checkNonExist = func() bool {
return tester.getHeader(hashes[0]) == nil
}
}
// Announce the same block many times until it's fetched (wait for any pending ops) // Announce the same block many times until it's fetched (wait for any pending ops)
for tester.getBlock(hashes[0]) == nil { for checkNonExist() {
tester.fetcher.Notify("repeater", hashes[0], 1, time.Now().Add(-arriveTimeout), headerWrapper, bodyFetcher) tester.fetcher.Notify("repeater", hashes[0], 1, time.Now().Add(-arriveTimeout), headerWrapper, bodyFetcher)
time.Sleep(time.Millisecond) time.Sleep(time.Millisecond)
} }
time.Sleep(delay) time.Sleep(delay)
// Check that all blocks were imported and none fetched twice // Check that all blocks were imported and none fetched twice
if imported := len(tester.blocks); imported != 2 {
t.Fatalf("synchronised block mismatch: have %v, want %v", imported, 2)
}
if int(counter) != 1 { if int(counter) != 1 {
t.Fatalf("retrieval count mismatch: have %v, want %v", counter, 1) t.Fatalf("retrieval count mismatch: have %v, want %v", counter, 1)
} }
verifyChainHeight(t, tester, 1)
} }
// Tests that announcements retrieved in a random order are cached and eventually // Tests that announcements retrieved in a random order are cached and eventually
// imported when all the gaps are filled in. // imported when all the gaps are filled in.
func TestRandomArrivalImport62(t *testing.T) { testRandomArrivalImport(t, 62) } func TestFullRandomArrivalImport(t *testing.T) { testRandomArrivalImport(t, false) }
func TestRandomArrivalImport63(t *testing.T) { testRandomArrivalImport(t, 63) } func TestLightRandomArrivalImport(t *testing.T) { testRandomArrivalImport(t, true) }
func TestRandomArrivalImport64(t *testing.T) { testRandomArrivalImport(t, 64) }
func testRandomArrivalImport(t *testing.T, protocol int) { func testRandomArrivalImport(t *testing.T, light bool) {
// Create a chain of blocks to import, and choose one to delay // Create a chain of blocks to import, and choose one to delay
targetBlocks := maxQueueDist targetBlocks := maxQueueDist
hashes, blocks := makeChain(targetBlocks, 0, genesis) hashes, blocks := makeChain(targetBlocks, 0, genesis)
skip := targetBlocks / 2 skip := targetBlocks / 2
tester := newTester() tester := newTester(light)
headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack) headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack)
bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0) bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0)
// Iteratively announce blocks, skipping one entry // Iteratively announce blocks, skipping one entry
imported := make(chan *types.Block, len(hashes)-1) imported := make(chan interface{}, len(hashes)-1)
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) {
if light {
if header == nil {
t.Fatalf("Fetcher try to import empty header")
}
imported <- header
} else {
if block == nil {
t.Fatalf("Fetcher try to import empty block")
}
imported <- block
}
}
for i := len(hashes) - 1; i >= 0; i-- { for i := len(hashes) - 1; i >= 0; i-- {
if i != skip { if i != skip {
tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher) tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
@ -448,27 +538,24 @@ func testRandomArrivalImport(t *testing.T, protocol int) {
// Finally announce the skipped entry and check full import // Finally announce the skipped entry and check full import
tester.fetcher.Notify("valid", hashes[skip], uint64(len(hashes)-skip-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher) tester.fetcher.Notify("valid", hashes[skip], uint64(len(hashes)-skip-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
verifyImportCount(t, imported, len(hashes)-1) verifyImportCount(t, imported, len(hashes)-1)
verifyChainHeight(t, tester, uint64(len(hashes)-1))
} }
// Tests that direct block enqueues (due to block propagation vs. hash announce) // Tests that direct block enqueues (due to block propagation vs. hash announce)
// are correctly schedule, filling and import queue gaps. // are correctly schedule, filling and import queue gaps.
func TestQueueGapFill62(t *testing.T) { testQueueGapFill(t, 62) } func TestQueueGapFill(t *testing.T) {
func TestQueueGapFill63(t *testing.T) { testQueueGapFill(t, 63) }
func TestQueueGapFill64(t *testing.T) { testQueueGapFill(t, 64) }
func testQueueGapFill(t *testing.T, protocol int) {
// Create a chain of blocks to import, and choose one to not announce at all // Create a chain of blocks to import, and choose one to not announce at all
targetBlocks := maxQueueDist targetBlocks := maxQueueDist
hashes, blocks := makeChain(targetBlocks, 0, genesis) hashes, blocks := makeChain(targetBlocks, 0, genesis)
skip := targetBlocks / 2 skip := targetBlocks / 2
tester := newTester() tester := newTester(false)
headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack) headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack)
bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0) bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0)
// Iteratively announce blocks, skipping one entry // Iteratively announce blocks, skipping one entry
imported := make(chan *types.Block, len(hashes)-1) imported := make(chan interface{}, len(hashes)-1)
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) { imported <- block }
for i := len(hashes) - 1; i >= 0; i-- { for i := len(hashes) - 1; i >= 0; i-- {
if i != skip { if i != skip {
@ -479,20 +566,17 @@ func testQueueGapFill(t *testing.T, protocol int) {
// Fill the missing block directly as if propagated // Fill the missing block directly as if propagated
tester.fetcher.Enqueue("valid", blocks[hashes[skip]]) tester.fetcher.Enqueue("valid", blocks[hashes[skip]])
verifyImportCount(t, imported, len(hashes)-1) verifyImportCount(t, imported, len(hashes)-1)
verifyChainHeight(t, tester, uint64(len(hashes)-1))
} }
// Tests that blocks arriving from various sources (multiple propagations, hash // Tests that blocks arriving from various sources (multiple propagations, hash
// announces, etc) do not get scheduled for import multiple times. // announces, etc) do not get scheduled for import multiple times.
func TestImportDeduplication62(t *testing.T) { testImportDeduplication(t, 62) } func TestImportDeduplication(t *testing.T) {
func TestImportDeduplication63(t *testing.T) { testImportDeduplication(t, 63) }
func TestImportDeduplication64(t *testing.T) { testImportDeduplication(t, 64) }
func testImportDeduplication(t *testing.T, protocol int) {
// Create two blocks to import (one for duplication, the other for stalling) // Create two blocks to import (one for duplication, the other for stalling)
hashes, blocks := makeChain(2, 0, genesis) hashes, blocks := makeChain(2, 0, genesis)
// Create the tester and wrap the importer with a counter // Create the tester and wrap the importer with a counter
tester := newTester() tester := newTester(false)
headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack) headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack)
bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0) bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0)
@ -503,9 +587,9 @@ func testImportDeduplication(t *testing.T, protocol int) {
} }
// Instrument the fetching and imported events // Instrument the fetching and imported events
fetching := make(chan []common.Hash) fetching := make(chan []common.Hash)
imported := make(chan *types.Block, len(hashes)-1) imported := make(chan interface{}, len(hashes)-1)
tester.fetcher.fetchingHook = func(hashes []common.Hash) { fetching <- hashes } tester.fetcher.fetchingHook = func(hashes []common.Hash) { fetching <- hashes }
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) { imported <- block }
// Announce the duplicating block, wait for retrieval, and also propagate directly // Announce the duplicating block, wait for retrieval, and also propagate directly
tester.fetcher.Notify("valid", hashes[0], 1, time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher) tester.fetcher.Notify("valid", hashes[0], 1, time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
@ -534,7 +618,7 @@ func TestDistantPropagationDiscarding(t *testing.T) {
low, high := len(hashes)/2+maxUncleDist+1, len(hashes)/2-maxQueueDist-1 low, high := len(hashes)/2+maxUncleDist+1, len(hashes)/2-maxQueueDist-1
// Create a tester and simulate a head block being the middle of the above chain // Create a tester and simulate a head block being the middle of the above chain
tester := newTester() tester := newTester(false)
tester.lock.Lock() tester.lock.Lock()
tester.hashes = []common.Hash{head} tester.hashes = []common.Hash{head}
@ -558,11 +642,10 @@ func TestDistantPropagationDiscarding(t *testing.T) {
// Tests that announcements with numbers much lower or higher than out current // Tests that announcements with numbers much lower or higher than out current
// head get discarded to prevent wasting resources on useless blocks from faulty // head get discarded to prevent wasting resources on useless blocks from faulty
// peers. // peers.
func TestDistantAnnouncementDiscarding62(t *testing.T) { testDistantAnnouncementDiscarding(t, 62) } func TestFullDistantAnnouncementDiscarding(t *testing.T) { testDistantAnnouncementDiscarding(t, false) }
func TestDistantAnnouncementDiscarding63(t *testing.T) { testDistantAnnouncementDiscarding(t, 63) } func TestLightDistantAnnouncementDiscarding(t *testing.T) { testDistantAnnouncementDiscarding(t, true) }
func TestDistantAnnouncementDiscarding64(t *testing.T) { testDistantAnnouncementDiscarding(t, 64) }
func testDistantAnnouncementDiscarding(t *testing.T, protocol int) { func testDistantAnnouncementDiscarding(t *testing.T, light bool) {
// Create a long chain to import and define the discard boundaries // Create a long chain to import and define the discard boundaries
hashes, blocks := makeChain(3*maxQueueDist, 0, genesis) hashes, blocks := makeChain(3*maxQueueDist, 0, genesis)
head := hashes[len(hashes)/2] head := hashes[len(hashes)/2]
@ -570,10 +653,11 @@ func testDistantAnnouncementDiscarding(t *testing.T, protocol int) {
low, high := len(hashes)/2+maxUncleDist+1, len(hashes)/2-maxQueueDist-1 low, high := len(hashes)/2+maxUncleDist+1, len(hashes)/2-maxQueueDist-1
// Create a tester and simulate a head block being the middle of the above chain // Create a tester and simulate a head block being the middle of the above chain
tester := newTester() tester := newTester(light)
tester.lock.Lock() tester.lock.Lock()
tester.hashes = []common.Hash{head} tester.hashes = []common.Hash{head}
tester.headers = map[common.Hash]*types.Header{head: blocks[head].Header()}
tester.blocks = map[common.Hash]*types.Block{head: blocks[head]} tester.blocks = map[common.Hash]*types.Block{head: blocks[head]}
tester.lock.Unlock() tester.lock.Unlock()
@ -601,21 +685,31 @@ func testDistantAnnouncementDiscarding(t *testing.T, protocol int) {
// Tests that peers announcing blocks with invalid numbers (i.e. not matching // Tests that peers announcing blocks with invalid numbers (i.e. not matching
// the headers provided afterwards) get dropped as malicious. // the headers provided afterwards) get dropped as malicious.
func TestInvalidNumberAnnouncement62(t *testing.T) { testInvalidNumberAnnouncement(t, 62) } func TestFullInvalidNumberAnnouncement(t *testing.T) { testInvalidNumberAnnouncement(t, false) }
func TestInvalidNumberAnnouncement63(t *testing.T) { testInvalidNumberAnnouncement(t, 63) } func TestLightInvalidNumberAnnouncement(t *testing.T) { testInvalidNumberAnnouncement(t, true) }
func TestInvalidNumberAnnouncement64(t *testing.T) { testInvalidNumberAnnouncement(t, 64) }
func testInvalidNumberAnnouncement(t *testing.T, protocol int) { func testInvalidNumberAnnouncement(t *testing.T, light bool) {
// Create a single block to import and check numbers against // Create a single block to import and check numbers against
hashes, blocks := makeChain(1, 0, genesis) hashes, blocks := makeChain(1, 0, genesis)
tester := newTester() tester := newTester(light)
badHeaderFetcher := tester.makeHeaderFetcher("bad", blocks, -gatherSlack) badHeaderFetcher := tester.makeHeaderFetcher("bad", blocks, -gatherSlack)
badBodyFetcher := tester.makeBodyFetcher("bad", blocks, 0) badBodyFetcher := tester.makeBodyFetcher("bad", blocks, 0)
imported := make(chan *types.Block) imported := make(chan interface{})
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) {
if light {
if header == nil {
t.Fatalf("Fetcher try to import empty header")
}
imported <- header
} else {
if block == nil {
t.Fatalf("Fetcher try to import empty block")
}
imported <- block
}
}
// Announce a block with a bad number, check for immediate drop // Announce a block with a bad number, check for immediate drop
tester.fetcher.Notify("bad", hashes[0], 2, time.Now().Add(-arriveTimeout), badHeaderFetcher, badBodyFetcher) tester.fetcher.Notify("bad", hashes[0], 2, time.Now().Add(-arriveTimeout), badHeaderFetcher, badBodyFetcher)
verifyImportEvent(t, imported, false) verifyImportEvent(t, imported, false)
@ -646,15 +740,11 @@ func testInvalidNumberAnnouncement(t *testing.T, protocol int) {
// Tests that if a block is empty (i.e. header only), no body request should be // Tests that if a block is empty (i.e. header only), no body request should be
// made, and instead the header should be assembled into a whole block in itself. // made, and instead the header should be assembled into a whole block in itself.
func TestEmptyBlockShortCircuit62(t *testing.T) { testEmptyBlockShortCircuit(t, 62) } func TestEmptyBlockShortCircuit(t *testing.T) {
func TestEmptyBlockShortCircuit63(t *testing.T) { testEmptyBlockShortCircuit(t, 63) }
func TestEmptyBlockShortCircuit64(t *testing.T) { testEmptyBlockShortCircuit(t, 64) }
func testEmptyBlockShortCircuit(t *testing.T, protocol int) {
// Create a chain of blocks to import // Create a chain of blocks to import
hashes, blocks := makeChain(32, 0, genesis) hashes, blocks := makeChain(32, 0, genesis)
tester := newTester() tester := newTester(false)
headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack) headerFetcher := tester.makeHeaderFetcher("valid", blocks, -gatherSlack)
bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0) bodyFetcher := tester.makeBodyFetcher("valid", blocks, 0)
@ -665,9 +755,13 @@ func testEmptyBlockShortCircuit(t *testing.T, protocol int) {
completing := make(chan []common.Hash) completing := make(chan []common.Hash)
tester.fetcher.completingHook = func(hashes []common.Hash) { completing <- hashes } tester.fetcher.completingHook = func(hashes []common.Hash) { completing <- hashes }
imported := make(chan *types.Block) imported := make(chan interface{})
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) {
if block == nil {
t.Fatalf("Fetcher try to import empty block")
}
imported <- block
}
// Iteratively announce blocks until all are imported // Iteratively announce blocks until all are imported
for i := len(hashes) - 2; i >= 0; i-- { for i := len(hashes) - 2; i >= 0; i-- {
tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher) tester.fetcher.Notify("valid", hashes[i], uint64(len(hashes)-i-1), time.Now().Add(-arriveTimeout), headerFetcher, bodyFetcher)
@ -687,16 +781,12 @@ func testEmptyBlockShortCircuit(t *testing.T, protocol int) {
// Tests that a peer is unable to use unbounded memory with sending infinite // Tests that a peer is unable to use unbounded memory with sending infinite
// block announcements to a node, but that even in the face of such an attack, // block announcements to a node, but that even in the face of such an attack,
// the fetcher remains operational. // the fetcher remains operational.
func TestHashMemoryExhaustionAttack62(t *testing.T) { testHashMemoryExhaustionAttack(t, 62) } func TestHashMemoryExhaustionAttack(t *testing.T) {
func TestHashMemoryExhaustionAttack63(t *testing.T) { testHashMemoryExhaustionAttack(t, 63) }
func TestHashMemoryExhaustionAttack64(t *testing.T) { testHashMemoryExhaustionAttack(t, 64) }
func testHashMemoryExhaustionAttack(t *testing.T, protocol int) {
// Create a tester with instrumented import hooks // Create a tester with instrumented import hooks
tester := newTester() tester := newTester(false)
imported, announces := make(chan *types.Block), int32(0) imported, announces := make(chan interface{}), int32(0)
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) { imported <- block }
tester.fetcher.announceChangeHook = func(hash common.Hash, added bool) { tester.fetcher.announceChangeHook = func(hash common.Hash, added bool) {
if added { if added {
atomic.AddInt32(&announces, 1) atomic.AddInt32(&announces, 1)
@ -740,10 +830,10 @@ func testHashMemoryExhaustionAttack(t *testing.T, protocol int) {
// system memory. // system memory.
func TestBlockMemoryExhaustionAttack(t *testing.T) { func TestBlockMemoryExhaustionAttack(t *testing.T) {
// Create a tester with instrumented import hooks // Create a tester with instrumented import hooks
tester := newTester() tester := newTester(false)
imported, enqueued := make(chan *types.Block), int32(0) imported, enqueued := make(chan interface{}), int32(0)
tester.fetcher.importedHook = func(block *types.Block) { imported <- block } tester.fetcher.importedHook = func(header *types.Header, block *types.Block) { imported <- block }
tester.fetcher.queueChangeHook = func(hash common.Hash, added bool) { tester.fetcher.queueChangeHook = func(hash common.Hash, added bool) {
if added { if added {
atomic.AddInt32(&enqueued, 1) atomic.AddInt32(&enqueued, 1)

2
eth/handler.go
View File

@ -188,7 +188,7 @@ func NewProtocolManager(config *params.ChainConfig, checkpoint *params.TrustedCh
} }
return n, err return n, err
} }
manager.blockFetcher = fetcher.NewBlockFetcher(blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, inserter, manager.removePeer) manager.blockFetcher = fetcher.NewBlockFetcher(false, nil, blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, nil, inserter, manager.removePeer)
fetchTx := func(peer string, hashes []common.Hash) error { fetchTx := func(peer string, hashes []common.Hash) error {
p := manager.peers.Peer(peer) p := manager.peers.Peer(peer)

3
les/client.go
View File

@ -269,7 +269,7 @@ func (s *LightEthereum) EventMux() *event.TypeMux { return s.eventMux
// network protocols to start. // network protocols to start.
func (s *LightEthereum) Protocols() []p2p.Protocol { func (s *LightEthereum) Protocols() []p2p.Protocol {
return s.makeProtocols(ClientProtocolVersions, s.handler.runPeer, func(id enode.ID) interface{} { return s.makeProtocols(ClientProtocolVersions, s.handler.runPeer, func(id enode.ID) interface{} {
if p := s.peers.peer(peerIdToString(id)); p != nil { if p := s.peers.peer(id.String()); p != nil {
return p.Info() return p.Info()
} }
return nil return nil
@ -285,6 +285,7 @@ func (s *LightEthereum) Start(srvr *p2p.Server) error {
// Start bloom request workers. // Start bloom request workers.
s.wg.Add(bloomServiceThreads) s.wg.Add(bloomServiceThreads)
s.startBloomHandlers(params.BloomBitsBlocksClient) s.startBloomHandlers(params.BloomBitsBlocksClient)
s.handler.start()
s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.config.NetworkId) s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.config.NetworkId)
return nil return nil

28
les/client_handler.go
View File

@ -64,16 +64,20 @@ func newClientHandler(ulcServers []string, ulcFraction int, checkpoint *params.T
if checkpoint != nil { if checkpoint != nil {
height = (checkpoint.SectionIndex+1)*params.CHTFrequency - 1 height = (checkpoint.SectionIndex+1)*params.CHTFrequency - 1
} }
handler.fetcher = newLightFetcher(handler, backend.serverPool.getTimeout) handler.fetcher = newLightFetcher(backend.blockchain, backend.engine, backend.peers, handler.ulc, backend.chainDb, backend.reqDist, handler.synchronise)
handler.downloader = downloader.New(height, backend.chainDb, nil, backend.eventMux, nil, backend.blockchain, handler.removePeer) handler.downloader = downloader.New(height, backend.chainDb, nil, backend.eventMux, nil, backend.blockchain, handler.removePeer)
handler.backend.peers.subscribe((*downloaderPeerNotify)(handler)) handler.backend.peers.subscribe((*downloaderPeerNotify)(handler))
return handler return handler
} }
func (h *clientHandler) start() {
h.fetcher.start()
}
func (h *clientHandler) stop() { func (h *clientHandler) stop() {
close(h.closeCh) close(h.closeCh)
h.downloader.Terminate() h.downloader.Terminate()
h.fetcher.close() h.fetcher.stop()
h.wg.Wait() h.wg.Wait()
} }
@ -121,7 +125,6 @@ func (h *clientHandler) handle(p *serverPeer) error {
connectionTimer.Update(time.Duration(mclock.Now() - connectedAt)) connectionTimer.Update(time.Duration(mclock.Now() - connectedAt))
serverConnectionGauge.Update(int64(h.backend.peers.len())) serverConnectionGauge.Update(int64(h.backend.peers.len()))
}() }()
h.fetcher.announce(p, &announceData{Hash: p.headInfo.Hash, Number: p.headInfo.Number, Td: p.headInfo.Td}) h.fetcher.announce(p, &announceData{Hash: p.headInfo.Hash, Number: p.headInfo.Number, Td: p.headInfo.Td})
// Mark the peer starts to be served. // Mark the peer starts to be served.
@ -185,6 +188,9 @@ func (h *clientHandler) handleMsg(p *serverPeer) error {
p.Log().Trace("Valid announcement signature") p.Log().Trace("Valid announcement signature")
} }
p.Log().Trace("Announce message content", "number", req.Number, "hash", req.Hash, "td", req.Td, "reorg", req.ReorgDepth) p.Log().Trace("Announce message content", "number", req.Number, "hash", req.Hash, "td", req.Td, "reorg", req.ReorgDepth)
// Update peer head information first and then notify the announcement
p.updateHead(req.Hash, req.Number, req.Td)
h.fetcher.announce(p, &req) h.fetcher.announce(p, &req)
} }
case BlockHeadersMsg: case BlockHeadersMsg:
@ -196,12 +202,17 @@ func (h *clientHandler) handleMsg(p *serverPeer) error {
if err := msg.Decode(&resp); err != nil { if err := msg.Decode(&resp); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err) return errResp(ErrDecode, "msg %v: %v", msg, err)
} }
headers := resp.Headers
p.fcServer.ReceivedReply(resp.ReqID, resp.BV) p.fcServer.ReceivedReply(resp.ReqID, resp.BV)
p.answeredRequest(resp.ReqID) p.answeredRequest(resp.ReqID)
if h.fetcher.requestedID(resp.ReqID) {
h.fetcher.deliverHeaders(p, resp.ReqID, resp.Headers) // Filter out any explicitly requested headers, deliver the rest to the downloader
} else { filter := len(headers) == 1
if err := h.downloader.DeliverHeaders(p.id, resp.Headers); err != nil { if filter {
headers = h.fetcher.deliverHeaders(p, resp.ReqID, resp.Headers)
}
if len(headers) != 0 || !filter {
if err := h.downloader.DeliverHeaders(p.id, headers); err != nil {
log.Debug("Failed to deliver headers", "err", err) log.Debug("Failed to deliver headers", "err", err)
} }
} }
@ -320,8 +331,7 @@ func (h *clientHandler) handleMsg(p *serverPeer) error {
// Deliver the received response to retriever. // Deliver the received response to retriever.
if deliverMsg != nil { if deliverMsg != nil {
if err := h.backend.retriever.deliver(p, deliverMsg); err != nil { if err := h.backend.retriever.deliver(p, deliverMsg); err != nil {
p.errCount++ if val := p.errCount.Add(1, mclock.Now()); val > maxResponseErrors {
if p.errCount > maxResponseErrors {
return err return err
} }
} }

6
les/clientpool.go
View File

@ -212,7 +212,7 @@ func (f *clientPool) connect(peer clientPoolPeer, capacity uint64) bool {
id, freeID := peer.ID(), peer.freeClientId() id, freeID := peer.ID(), peer.freeClientId()
if _, ok := f.connectedMap[id]; ok { if _, ok := f.connectedMap[id]; ok {
clientRejectedMeter.Mark(1) clientRejectedMeter.Mark(1)
log.Debug("Client already connected", "address", freeID, "id", peerIdToString(id)) log.Debug("Client already connected", "address", freeID, "id", id.String())
return false return false
} }
// Create a clientInfo but do not add it yet // Create a clientInfo but do not add it yet
@ -277,7 +277,7 @@ func (f *clientPool) connect(peer clientPoolPeer, capacity uint64) bool {
f.connectedQueue.Push(c) f.connectedQueue.Push(c)
} }
clientRejectedMeter.Mark(1) clientRejectedMeter.Mark(1)
log.Debug("Client rejected", "address", freeID, "id", peerIdToString(id)) log.Debug("Client rejected", "address", freeID, "id", id.String())
return false return false
} }
// accept new client, drop old ones // accept new client, drop old ones
@ -322,7 +322,7 @@ func (f *clientPool) disconnect(p clientPoolPeer) {
// Short circuit if the peer hasn't been registered. // Short circuit if the peer hasn't been registered.
e := f.connectedMap[p.ID()] e := f.connectedMap[p.ID()]
if e == nil { if e == nil {
log.Debug("Client not connected", "address", p.freeClientId(), "id", peerIdToString(p.ID())) log.Debug("Client not connected", "address", p.freeClientId(), "id", p.ID().String())
return return
} }
f.dropClient(e, f.clock.Now(), false) f.dropClient(e, f.clock.Now(), false)

1275
les/fetcher.go
View File

File diff suppressed because it is too large Load Diff

268
les/fetcher_test.go Normal file
View File

@ -0,0 +1,268 @@
// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package les
import (
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/p2p/enode"
)
// verifyImportEvent verifies that one single event arrive on an import channel.
func verifyImportEvent(t *testing.T, imported chan interface{}, arrive bool) {
if arrive {
select {
case <-imported:
case <-time.After(time.Second):
t.Fatalf("import timeout")
}
} else {
select {
case <-imported:
t.Fatalf("import invoked")
case <-time.After(20 * time.Millisecond):
}
}
}
// verifyImportDone verifies that no more events are arriving on an import channel.
func verifyImportDone(t *testing.T, imported chan interface{}) {
select {
case <-imported:
t.Fatalf("extra block imported")
case <-time.After(50 * time.Millisecond):
}
}
// verifyChainHeight verifies the chain height is as expected.
func verifyChainHeight(t *testing.T, fetcher *lightFetcher, height uint64) {
local := fetcher.chain.CurrentHeader().Number.Uint64()
if local != height {
t.Fatalf("chain height mismatch, got %d, want %d", local, height)
}
}
func TestSequentialAnnouncementsLes2(t *testing.T) { testSequentialAnnouncements(t, 2) }
func TestSequentialAnnouncementsLes3(t *testing.T) { testSequentialAnnouncements(t, 3) }
func testSequentialAnnouncements(t *testing.T, protocol int) {
s, c, teardown := newClientServerEnv(t, 4, protocol, nil, nil, 0, false, false)
defer teardown()
// Create connected peer pair.
c.handler.fetcher.noAnnounce = true // Ignore the first announce from peer which can trigger a resync.
p1, _, err := newTestPeerPair("peer", protocol, s.handler, c.handler)
if err != nil {
t.Fatalf("Failed to create peer pair %v", err)
}
c.handler.fetcher.noAnnounce = false
importCh := make(chan interface{})
c.handler.fetcher.newHeadHook = func(header *types.Header) {
importCh <- header
}
for i := uint64(1); i <= s.backend.Blockchain().CurrentHeader().Number.Uint64(); i++ {
header := s.backend.Blockchain().GetHeaderByNumber(i)
hash, number := header.Hash(), header.Number.Uint64()
td := rawdb.ReadTd(s.db, hash, number)
announce := announceData{hash, number, td, 0, nil}
if p1.cpeer.announceType == announceTypeSigned {
announce.sign(s.handler.server.privateKey)
}
p1.cpeer.sendAnnounce(announce)
verifyImportEvent(t, importCh, true)
}
verifyImportDone(t, importCh)
verifyChainHeight(t, c.handler.fetcher, 4)
}
func TestGappedAnnouncementsLes2(t *testing.T) { testGappedAnnouncements(t, 2) }
func TestGappedAnnouncementsLes3(t *testing.T) { testGappedAnnouncements(t, 3) }
func testGappedAnnouncements(t *testing.T, protocol int) {
s, c, teardown := newClientServerEnv(t, 4, protocol, nil, nil, 0, false, false)
defer teardown()
// Create connected peer pair.
c.handler.fetcher.noAnnounce = true // Ignore the first announce from peer which can trigger a resync.
peer, _, err := newTestPeerPair("peer", protocol, s.handler, c.handler)
if err != nil {
t.Fatalf("Failed to create peer pair %v", err)
}
c.handler.fetcher.noAnnounce = false
done := make(chan *types.Header, 1)
c.handler.fetcher.newHeadHook = func(header *types.Header) { done <- header }
// Prepare announcement by latest header.
latest := s.backend.Blockchain().CurrentHeader()
hash, number := latest.Hash(), latest.Number.Uint64()
td := rawdb.ReadTd(s.db, hash, number)
// Sign the announcement if necessary.
announce := announceData{hash, number, td, 0, nil}
if peer.cpeer.announceType == announceTypeSigned {
announce.sign(s.handler.server.privateKey)
}
peer.cpeer.sendAnnounce(announce)
<-done // Wait syncing
verifyChainHeight(t, c.handler.fetcher, 4)
// Send a reorged announcement
var newAnno = make(chan struct{}, 1)
c.handler.fetcher.noAnnounce = true
c.handler.fetcher.newAnnounce = func(*serverPeer, *announceData) {
newAnno <- struct{}{}
}
blocks, _ := core.GenerateChain(rawdb.ReadChainConfig(s.db, s.backend.Blockchain().Genesis().Hash()), s.backend.Blockchain().GetBlockByNumber(3),
ethash.NewFaker(), s.db, 2, func(i int, gen *core.BlockGen) {
gen.OffsetTime(-9) // higher block difficulty
})
s.backend.Blockchain().InsertChain(blocks)
<-newAnno
c.handler.fetcher.noAnnounce = false
c.handler.fetcher.newAnnounce = nil
latest = blocks[len(blocks)-1].Header()
hash, number = latest.Hash(), latest.Number.Uint64()
td = rawdb.ReadTd(s.db, hash, number)
announce = announceData{hash, number, td, 1, nil}
if peer.cpeer.announceType == announceTypeSigned {
announce.sign(s.handler.server.privateKey)
}
peer.cpeer.sendAnnounce(announce)
<-done // Wait syncing
verifyChainHeight(t, c.handler.fetcher, 5)
}
func TestTrustedAnnouncementsLes2(t *testing.T) { testTrustedAnnouncement(t, 2) }
func TestTrustedAnnouncementsLes3(t *testing.T) { testTrustedAnnouncement(t, 3) }
func testTrustedAnnouncement(t *testing.T, protocol int) {
var (
servers []*testServer
teardowns []func()
nodes []*enode.Node
ids []string
cpeers []*clientPeer
speers []*serverPeer
)
for i := 0; i < 10; i++ {
s, n, teardown := newTestServerPeer(t, 10, protocol)
servers = append(servers, s)
nodes = append(nodes, n)
teardowns = append(teardowns, teardown)
// A half of them are trusted servers.
if i < 5 {
ids = append(ids, n.String())
}
}
_, c, teardown := newClientServerEnv(t, 0, protocol, nil, ids, 60, false, false)
defer teardown()
defer func() {
for i := 0; i < len(teardowns); i++ {
teardowns[i]()
}
}()
c.handler.fetcher.noAnnounce = true // Ignore the first announce from peer which can trigger a resync.
// Connect all server instances.
for i := 0; i < len(servers); i++ {
sp, cp, err := connect(servers[i].handler, nodes[i].ID(), c.handler, protocol)
if err != nil {
t.Fatalf("connect server and client failed, err %s", err)
}
cpeers = append(cpeers, cp)
speers = append(speers, sp)
}
c.handler.fetcher.noAnnounce = false
newHead := make(chan *types.Header, 1)
c.handler.fetcher.newHeadHook = func(header *types.Header) { newHead <- header }
check := func(height []uint64, expected uint64, callback func()) {
for i := 0; i < len(height); i++ {
for j := 0; j < len(servers); j++ {
h := servers[j].backend.Blockchain().GetHeaderByNumber(height[i])
hash, number := h.Hash(), h.Number.Uint64()
td := rawdb.ReadTd(servers[j].db, hash, number)
// Sign the announcement if necessary.
announce := announceData{hash, number, td, 0, nil}
p := cpeers[j]
if p.announceType == announceTypeSigned {
announce.sign(servers[j].handler.server.privateKey)
}
p.sendAnnounce(announce)
}
}
if callback != nil {
callback()
}
verifyChainHeight(t, c.handler.fetcher, expected)
}
check([]uint64{1}, 1, func() { <-newHead }) // Sequential announcements
check([]uint64{4}, 4, func() { <-newHead }) // ULC-style light syncing, rollback untrusted headers
check([]uint64{10}, 10, func() { <-newHead }) // Sync the whole chain.
}
func TestInvalidAnnounces(t *testing.T) {
s, c, teardown := newClientServerEnv(t, 4, lpv3, nil, nil, 0, false, false)
defer teardown()
// Create connected peer pair.
c.handler.fetcher.noAnnounce = true // Ignore the first announce from peer which can trigger a resync.
peer, _, err := newTestPeerPair("peer", lpv3, s.handler, c.handler)
if err != nil {
t.Fatalf("Failed to create peer pair %v", err)
}
c.handler.fetcher.noAnnounce = false
done := make(chan *types.Header, 1)
c.handler.fetcher.newHeadHook = func(header *types.Header) { done <- header }
// Prepare announcement by latest header.
headerOne := s.backend.Blockchain().GetHeaderByNumber(1)
hash, number := headerOne.Hash(), headerOne.Number.Uint64()
td := big.NewInt(200) // bad td
// Sign the announcement if necessary.
announce := announceData{hash, number, td, 0, nil}
if peer.cpeer.announceType == announceTypeSigned {
announce.sign(s.handler.server.privateKey)
}
peer.cpeer.sendAnnounce(announce)
<-done // Wait syncing
// Ensure the bad peer is evicited
if c.handler.backend.peers.len() != 0 {
t.Fatalf("Failed to evict invalid peer")
}
}

4
les/odr_test.go
View File

@ -222,13 +222,13 @@ func testOdr(t *testing.T, protocol int, expFail uint64, checkCached bool, fn od
// expect retrievals to fail (except genesis block) without a les peer // expect retrievals to fail (except genesis block) without a les peer
client.handler.backend.peers.lock.Lock() client.handler.backend.peers.lock.Lock()
client.peer.speer.hasBlock = func(common.Hash, uint64, bool) bool { return false } client.peer.speer.hasBlockHook = func(common.Hash, uint64, bool) bool { return false }
client.handler.backend.peers.lock.Unlock() client.handler.backend.peers.lock.Unlock()
test(expFail) test(expFail)
// expect all retrievals to pass // expect all retrievals to pass
client.handler.backend.peers.lock.Lock() client.handler.backend.peers.lock.Lock()
client.peer.speer.hasBlock = func(common.Hash, uint64, bool) bool { return true } client.peer.speer.hasBlockHook = func(common.Hash, uint64, bool) bool { return true }
client.handler.backend.peers.lock.Unlock() client.handler.backend.peers.lock.Unlock()
test(5) test(5)

56
les/peer.go
View File

@ -36,7 +36,6 @@ import (
"github.com/ethereum/go-ethereum/les/utils" "github.com/ethereum/go-ethereum/les/utils"
"github.com/ethereum/go-ethereum/light" "github.com/ethereum/go-ethereum/light"
"github.com/ethereum/go-ethereum/p2p" "github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/params" "github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp" "github.com/ethereum/go-ethereum/rlp"
) )
@ -115,11 +114,6 @@ func (m keyValueMap) get(key string, val interface{}) error {
return rlp.DecodeBytes(enc, val) return rlp.DecodeBytes(enc, val)
} }
// peerIdToString converts enode.ID to a string form
func peerIdToString(id enode.ID) string {
return fmt.Sprintf("%x", id.Bytes())
}
// peerCommons contains fields needed by both server peer and client peer. // peerCommons contains fields needed by both server peer and client peer.
type peerCommons struct { type peerCommons struct {
*p2p.Peer *p2p.Peer
@ -343,12 +337,12 @@ type serverPeer struct {
sentReqs map[uint64]sentReqEntry sentReqs map[uint64]sentReqEntry
// Statistics // Statistics
errCount int // Counter the invalid responses server has replied errCount utils.LinearExpiredValue // Counter the invalid responses server has replied
updateCount uint64 updateCount uint64
updateTime mclock.AbsTime updateTime mclock.AbsTime
// Callbacks // Test callback hooks
hasBlock func(common.Hash, uint64, bool) bool // Used to determine whether the server has the specified block. hasBlockHook func(common.Hash, uint64, bool) bool // Used to determine whether the server has the specified block.
} }
func newServerPeer(version int, network uint64, trusted bool, p *p2p.Peer, rw p2p.MsgReadWriter) *serverPeer { func newServerPeer(version int, network uint64, trusted bool, p *p2p.Peer, rw p2p.MsgReadWriter) *serverPeer {
@ -356,13 +350,14 @@ func newServerPeer(version int, network uint64, trusted bool, p *p2p.Peer, rw p2
peerCommons: peerCommons{ peerCommons: peerCommons{
Peer: p, Peer: p,
rw: rw, rw: rw,
id: peerIdToString(p.ID()), id: p.ID().String(),
version: version, version: version,
network: network, network: network,
sendQueue: utils.NewExecQueue(100), sendQueue: utils.NewExecQueue(100),
closeCh: make(chan struct{}), closeCh: make(chan struct{}),
}, },
trusted: trusted, trusted: trusted,
errCount: utils.LinearExpiredValue{Rate: mclock.AbsTime(time.Hour)},
} }
} }
@ -524,7 +519,11 @@ func (p *serverPeer) getTxRelayCost(amount, size int) uint64 {
// HasBlock checks if the peer has a given block // HasBlock checks if the peer has a given block
func (p *serverPeer) HasBlock(hash common.Hash, number uint64, hasState bool) bool { func (p *serverPeer) HasBlock(hash common.Hash, number uint64, hasState bool) bool {
p.lock.RLock() p.lock.RLock()
defer p.lock.RUnlock()
if p.hasBlockHook != nil {
return p.hasBlockHook(hash, number, hasState)
}
head := p.headInfo.Number head := p.headInfo.Number
var since, recent uint64 var since, recent uint64
if hasState { if hasState {
@ -534,10 +533,7 @@ func (p *serverPeer) HasBlock(hash common.Hash, number uint64, hasState bool) bo
since = p.chainSince since = p.chainSince
recent = p.chainRecent recent = p.chainRecent
} }
hasBlock := p.hasBlock return head >= number && number >= since && (recent == 0 || number+recent+4 > head)
p.lock.RUnlock()
return head >= number && number >= since && (recent == 0 || number+recent+4 > head) && hasBlock != nil && hasBlock(hash, number, hasState)
} }
// updateFlowControl updates the flow control parameters belonging to the server // updateFlowControl updates the flow control parameters belonging to the server
@ -562,6 +558,15 @@ func (p *serverPeer) updateFlowControl(update keyValueMap) {
} }
} }
// updateHead updates the head information based on the announcement from
// the peer.
func (p *serverPeer) updateHead(hash common.Hash, number uint64, td *big.Int) {
p.lock.Lock()
defer p.lock.Unlock()
p.headInfo = blockInfo{Hash: hash, Number: number, Td: td}
}
// Handshake executes the les protocol handshake, negotiating version number, // Handshake executes the les protocol handshake, negotiating version number,
// network IDs, difficulties, head and genesis blocks. // network IDs, difficulties, head and genesis blocks.
func (p *serverPeer) Handshake(td *big.Int, head common.Hash, headNum uint64, genesis common.Hash, server *LesServer) error { func (p *serverPeer) Handshake(td *big.Int, head common.Hash, headNum uint64, genesis common.Hash, server *LesServer) error {
@ -712,9 +717,13 @@ type clientPeer struct {
// responseLock ensures that responses are queued in the same order as // responseLock ensures that responses are queued in the same order as
// RequestProcessed is called // RequestProcessed is called
responseLock sync.Mutex responseLock sync.Mutex
server bool
invalidCount uint32 // Counter the invalid request the client peer has made.
responseCount uint64 // Counter to generate an unique id for request processing. responseCount uint64 // Counter to generate an unique id for request processing.
// invalidLock is used for protecting invalidCount.
invalidLock sync.RWMutex
invalidCount utils.LinearExpiredValue // Counter the invalid request the client peer has made.
server bool
errCh chan error errCh chan error
fcClient *flowcontrol.ClientNode // Server side mirror token bucket. fcClient *flowcontrol.ClientNode // Server side mirror token bucket.
} }
@ -724,12 +733,13 @@ func newClientPeer(version int, network uint64, p *p2p.Peer, rw p2p.MsgReadWrite
peerCommons: peerCommons{ peerCommons: peerCommons{
Peer: p, Peer: p,
rw: rw, rw: rw,
id: peerIdToString(p.ID()), id: p.ID().String(),
version: version, version: version,
network: network, network: network,
sendQueue: utils.NewExecQueue(100), sendQueue: utils.NewExecQueue(100),
closeCh: make(chan struct{}), closeCh: make(chan struct{}),
}, },
invalidCount: utils.LinearExpiredValue{Rate: mclock.AbsTime(time.Hour)},
errCh: make(chan error, 1), errCh: make(chan error, 1),
} }
} }
@ -970,6 +980,18 @@ func (p *clientPeer) Handshake(td *big.Int, head common.Hash, headNum uint64, ge
}) })
} }
func (p *clientPeer) bumpInvalid() {
p.invalidLock.Lock()
p.invalidCount.Add(1, mclock.Now())
p.invalidLock.Unlock()
}
func (p *clientPeer) getInvalid() uint64 {
p.invalidLock.RLock()
defer p.invalidLock.RUnlock()
return p.invalidCount.Value(mclock.Now())
}
// serverPeerSubscriber is an interface to notify services about added or // serverPeerSubscriber is an interface to notify services about added or
// removed server peers // removed server peers
type serverPeerSubscriber interface { type serverPeerSubscriber interface {

4
les/server.go
View File

@ -116,7 +116,7 @@ func NewLesServer(e *eth.Ethereum, config *eth.Config) (*LesServer, error) {
srv.maxCapacity = totalRecharge srv.maxCapacity = totalRecharge
} }
srv.fcManager.SetCapacityLimits(srv.freeCapacity, srv.maxCapacity, srv.freeCapacity*2) srv.fcManager.SetCapacityLimits(srv.freeCapacity, srv.maxCapacity, srv.freeCapacity*2)
srv.clientPool = newClientPool(srv.chainDb, srv.freeCapacity, mclock.System{}, func(id enode.ID) { go srv.peers.unregister(peerIdToString(id)) }) srv.clientPool = newClientPool(srv.chainDb, srv.freeCapacity, mclock.System{}, func(id enode.ID) { go srv.peers.unregister(id.String()) })
srv.clientPool.setDefaultFactors(priceFactors{0, 1, 1}, priceFactors{0, 1, 1}) srv.clientPool.setDefaultFactors(priceFactors{0, 1, 1}, priceFactors{0, 1, 1})
checkpoint := srv.latestLocalCheckpoint() checkpoint := srv.latestLocalCheckpoint()
@ -153,7 +153,7 @@ func (s *LesServer) APIs() []rpc.API {
func (s *LesServer) Protocols() []p2p.Protocol { func (s *LesServer) Protocols() []p2p.Protocol {
ps := s.makeProtocols(ServerProtocolVersions, s.handler.runPeer, func(id enode.ID) interface{} { ps := s.makeProtocols(ServerProtocolVersions, s.handler.runPeer, func(id enode.ID) interface{} {
if p := s.peers.peer(peerIdToString(id)); p != nil { if p := s.peers.peer(id.String()); p != nil {
return p.Info() return p.Info()
} }
return nil return nil

24
les/server_handler.go
View File

@ -322,7 +322,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
origin = h.blockchain.GetHeaderByNumber(query.Origin.Number) origin = h.blockchain.GetHeaderByNumber(query.Origin.Number)
} }
if origin == nil { if origin == nil {
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
break break
} }
headers = append(headers, origin) headers = append(headers, origin)
@ -419,7 +419,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
} }
body := h.blockchain.GetBodyRLP(hash) body := h.blockchain.GetBodyRLP(hash)
if body == nil { if body == nil {
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
bodies = append(bodies, body) bodies = append(bodies, body)
@ -467,7 +467,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
header := h.blockchain.GetHeaderByHash(request.BHash) header := h.blockchain.GetHeaderByHash(request.BHash)
if header == nil { if header == nil {
p.Log().Warn("Failed to retrieve associate header for code", "hash", request.BHash) p.Log().Warn("Failed to retrieve associate header for code", "hash", request.BHash)
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
// Refuse to search stale state data in the database since looking for // Refuse to search stale state data in the database since looking for
@ -475,7 +475,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
local := h.blockchain.CurrentHeader().Number.Uint64() local := h.blockchain.CurrentHeader().Number.Uint64()
if !h.server.archiveMode && header.Number.Uint64()+core.TriesInMemory <= local { if !h.server.archiveMode && header.Number.Uint64()+core.TriesInMemory <= local {
p.Log().Debug("Reject stale code request", "number", header.Number.Uint64(), "head", local) p.Log().Debug("Reject stale code request", "number", header.Number.Uint64(), "head", local)
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
triedb := h.blockchain.StateCache().TrieDB() triedb := h.blockchain.StateCache().TrieDB()
@ -483,7 +483,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
account, err := h.getAccount(triedb, header.Root, common.BytesToHash(request.AccKey)) account, err := h.getAccount(triedb, header.Root, common.BytesToHash(request.AccKey))
if err != nil { if err != nil {
p.Log().Warn("Failed to retrieve account for code", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(request.AccKey), "err", err) p.Log().Warn("Failed to retrieve account for code", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(request.AccKey), "err", err)
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
code, err := triedb.Node(common.BytesToHash(account.CodeHash)) code, err := triedb.Node(common.BytesToHash(account.CodeHash))
@ -542,7 +542,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
results := h.blockchain.GetReceiptsByHash(hash) results := h.blockchain.GetReceiptsByHash(hash)
if results == nil { if results == nil {
if header := h.blockchain.GetHeaderByHash(hash); header == nil || header.ReceiptHash != types.EmptyRootHash { if header := h.blockchain.GetHeaderByHash(hash); header == nil || header.ReceiptHash != types.EmptyRootHash {
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
} }
@ -605,7 +605,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
if header = h.blockchain.GetHeaderByHash(request.BHash); header == nil { if header = h.blockchain.GetHeaderByHash(request.BHash); header == nil {
p.Log().Warn("Failed to retrieve header for proof", "hash", request.BHash) p.Log().Warn("Failed to retrieve header for proof", "hash", request.BHash)
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
// Refuse to search stale state data in the database since looking for // Refuse to search stale state data in the database since looking for
@ -613,14 +613,14 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
local := h.blockchain.CurrentHeader().Number.Uint64() local := h.blockchain.CurrentHeader().Number.Uint64()
if !h.server.archiveMode && header.Number.Uint64()+core.TriesInMemory <= local { if !h.server.archiveMode && header.Number.Uint64()+core.TriesInMemory <= local {
p.Log().Debug("Reject stale trie request", "number", header.Number.Uint64(), "head", local) p.Log().Debug("Reject stale trie request", "number", header.Number.Uint64(), "head", local)
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
root = header.Root root = header.Root
} }
// If a header lookup failed (non existent), ignore subsequent requests for the same header // If a header lookup failed (non existent), ignore subsequent requests for the same header
if root == (common.Hash{}) { if root == (common.Hash{}) {
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
// Open the account or storage trie for the request // Open the account or storage trie for the request
@ -639,7 +639,7 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
account, err := h.getAccount(statedb.TrieDB(), root, common.BytesToHash(request.AccKey)) account, err := h.getAccount(statedb.TrieDB(), root, common.BytesToHash(request.AccKey))
if err != nil { if err != nil {
p.Log().Warn("Failed to retrieve account for proof", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(request.AccKey), "err", err) p.Log().Warn("Failed to retrieve account for proof", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(request.AccKey), "err", err)
atomic.AddUint32(&p.invalidCount, 1) p.bumpInvalid()
continue continue
} }
trie, err = statedb.OpenStorageTrie(common.BytesToHash(request.AccKey), account.Root) trie, err = statedb.OpenStorageTrie(common.BytesToHash(request.AccKey), account.Root)
@ -833,9 +833,9 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
clientErrorMeter.Mark(1) clientErrorMeter.Mark(1)
return errResp(ErrInvalidMsgCode, "%v", msg.Code) return errResp(ErrInvalidMsgCode, "%v", msg.Code)
} }
// If the client has made too much invalid request(e.g. request a non-exist data), // If the client has made too much invalid request(e.g. request a non-existent data),
// reject them to prevent SPAM attack. // reject them to prevent SPAM attack.
if atomic.LoadUint32(&p.invalidCount) > maxRequestErrors { if p.getInvalid() > maxRequestErrors {
clientErrorMeter.Mark(1) clientErrorMeter.Mark(1)
return errTooManyInvalidRequest return errTooManyInvalidRequest
} }

1
les/test_helper.go
View File

@ -223,6 +223,7 @@ func newTestClientHandler(backend *backends.SimulatedBackend, odr *LesOdr, index
if client.oracle != nil { if client.oracle != nil {
client.oracle.Start(backend) client.oracle.Start(backend)
} }
client.handler.start()
return client.handler return client.handler
} }

44
les/utils/expiredvalue.go
View File

@ -124,6 +124,50 @@ func (e *ExpiredValue) SubExp(a ExpiredValue) {
} }
} }
// LinearExpiredValue is very similar with the expiredValue which the value
// will continuously expired. But the different part is it's expired linearly.
type LinearExpiredValue struct {
Offset uint64 // The latest time offset
Val uint64 // The remaining value, can never be negative
Rate mclock.AbsTime `rlp:"-"` // Expiration rate(by nanosecond), will ignored by RLP
}
// value calculates the value at the given moment. This function always has the
// assumption that the given timestamp shouldn't less than the recorded one.
func (e LinearExpiredValue) Value(now mclock.AbsTime) uint64 {
offset := uint64(now / e.Rate)
if e.Offset < offset {
diff := offset - e.Offset
if e.Val >= diff {
e.Val -= diff
} else {
e.Val = 0
}
}
return e.Val
}
// add adds a signed value at the given moment. This function always has the
// assumption that the given timestamp shouldn't less than the recorded one.
func (e *LinearExpiredValue) Add(amount int64, now mclock.AbsTime) uint64 {
offset := uint64(now / e.Rate)
if e.Offset < offset {
diff := offset - e.Offset
if e.Val >= diff {
e.Val -= diff
} else {
e.Val = 0
}
e.Offset = offset
}
if amount < 0 && uint64(-amount) > e.Val {
e.Val = 0
} else {
e.Val = uint64(int64(e.Val) + amount)
}
return e.Val
}
// Expirer changes logOffset with a linear rate which can be changed during operation. // Expirer changes logOffset with a linear rate which can be changed during operation.
// It is not thread safe, if access by multiple goroutines is needed then it should be // It is not thread safe, if access by multiple goroutines is needed then it should be
// encapsulated into a locked structure. // encapsulated into a locked structure.

77
les/utils/expiredvalue_test.go
View File

@ -18,6 +18,8 @@ package utils
import ( import (
"testing" "testing"
"github.com/ethereum/go-ethereum/common/mclock"
) )
func TestValueExpiration(t *testing.T) { func TestValueExpiration(t *testing.T) {
@ -116,3 +118,78 @@ func TestExpiredValueSubtraction(t *testing.T) {
} }
} }
} }
func TestLinearExpiredValue(t *testing.T) {
var cases = []struct {
value LinearExpiredValue
now mclock.AbsTime
expect uint64
}{
{LinearExpiredValue{
Offset: 0,
Val: 0,
Rate: mclock.AbsTime(1),
}, 0, 0},
{LinearExpiredValue{
Offset: 1,
Val: 1,
Rate: mclock.AbsTime(1),
}, 0, 1},
{LinearExpiredValue{
Offset: 1,
Val: 1,
Rate: mclock.AbsTime(1),
}, mclock.AbsTime(2), 0},
{LinearExpiredValue{
Offset: 1,
Val: 1,
Rate: mclock.AbsTime(1),
}, mclock.AbsTime(3), 0},
}
for _, c := range cases {
if value := c.value.Value(c.now); value != c.expect {
t.Fatalf("Value mismatch, want=%d, got=%d", c.expect, value)
}
}
}
func TestLinearExpiredAddition(t *testing.T) {
var cases = []struct {
value LinearExpiredValue
amount int64
now mclock.AbsTime
expect uint64
}{
{LinearExpiredValue{
Offset: 0,
Val: 0,
Rate: mclock.AbsTime(1),
}, -1, 0, 0},
{LinearExpiredValue{
Offset: 1,
Val: 1,
Rate: mclock.AbsTime(1),
}, -1, 0, 0},
{LinearExpiredValue{
Offset: 1,
Val: 2,
Rate: mclock.AbsTime(1),
}, -1, mclock.AbsTime(2), 0},
{LinearExpiredValue{
Offset: 1,
Val: 2,
Rate: mclock.AbsTime(1),
}, -2, mclock.AbsTime(2), 0},
}
for _, c := range cases {
if value := c.value.Add(c.amount, c.now); value != c.expect {
t.Fatalf("Value mismatch, want=%d, got=%d", c.expect, value)
}
}
}