911 lines
27 KiB
Go
911 lines
27 KiB
Go
// Copyright 2016 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 implements the Light Ethereum Subprotocol.
|
|
package les
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"errors"
|
|
"fmt"
|
|
"math/big"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/consensus"
|
|
"github.com/ethereum/go-ethereum/core"
|
|
"github.com/ethereum/go-ethereum/core/state"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/eth"
|
|
"github.com/ethereum/go-ethereum/eth/downloader"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/event"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/p2p"
|
|
"github.com/ethereum/go-ethereum/p2p/discover"
|
|
"github.com/ethereum/go-ethereum/p2p/discv5"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
"github.com/ethereum/go-ethereum/trie"
|
|
)
|
|
|
|
const (
|
|
softResponseLimit = 2 * 1024 * 1024 // Target maximum size of returned blocks, headers or node data.
|
|
estHeaderRlpSize = 500 // Approximate size of an RLP encoded block header
|
|
|
|
ethVersion = 63 // equivalent eth version for the downloader
|
|
|
|
MaxHeaderFetch = 192 // Amount of block headers to be fetched per retrieval request
|
|
MaxBodyFetch = 32 // Amount of block bodies to be fetched per retrieval request
|
|
MaxReceiptFetch = 128 // Amount of transaction receipts to allow fetching per request
|
|
MaxCodeFetch = 64 // Amount of contract codes to allow fetching per request
|
|
MaxProofsFetch = 64 // Amount of merkle proofs to be fetched per retrieval request
|
|
MaxHeaderProofsFetch = 64 // Amount of merkle proofs to be fetched per retrieval request
|
|
MaxTxSend = 64 // Amount of transactions to be send per request
|
|
|
|
disableClientRemovePeer = false
|
|
)
|
|
|
|
// errIncompatibleConfig is returned if the requested protocols and configs are
|
|
// not compatible (low protocol version restrictions and high requirements).
|
|
var errIncompatibleConfig = errors.New("incompatible configuration")
|
|
|
|
func errResp(code errCode, format string, v ...interface{}) error {
|
|
return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
|
|
}
|
|
|
|
type hashFetcherFn func(common.Hash) error
|
|
|
|
type BlockChain interface {
|
|
HasHeader(hash common.Hash) bool
|
|
GetHeader(hash common.Hash, number uint64) *types.Header
|
|
GetHeaderByHash(hash common.Hash) *types.Header
|
|
CurrentHeader() *types.Header
|
|
GetTdByHash(hash common.Hash) *big.Int
|
|
InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error)
|
|
Rollback(chain []common.Hash)
|
|
Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash)
|
|
GetHeaderByNumber(number uint64) *types.Header
|
|
GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash
|
|
LastBlockHash() common.Hash
|
|
Genesis() *types.Block
|
|
}
|
|
|
|
type txPool interface {
|
|
// AddRemotes should add the given transactions to the pool.
|
|
AddRemotes([]*types.Transaction) error
|
|
}
|
|
|
|
type ProtocolManager struct {
|
|
lightSync bool
|
|
txpool txPool
|
|
txrelay *LesTxRelay
|
|
networkId uint64
|
|
chainConfig *params.ChainConfig
|
|
blockchain BlockChain
|
|
chainDb ethdb.Database
|
|
odr *LesOdr
|
|
server *LesServer
|
|
serverPool *serverPool
|
|
lesTopic discv5.Topic
|
|
reqDist *requestDistributor
|
|
retriever *retrieveManager
|
|
|
|
downloader *downloader.Downloader
|
|
fetcher *lightFetcher
|
|
peers *peerSet
|
|
|
|
SubProtocols []p2p.Protocol
|
|
|
|
eventMux *event.TypeMux
|
|
|
|
// channels for fetcher, syncer, txsyncLoop
|
|
newPeerCh chan *peer
|
|
quitSync chan struct{}
|
|
noMorePeers chan struct{}
|
|
|
|
syncMu sync.Mutex
|
|
syncing bool
|
|
syncDone chan struct{}
|
|
|
|
// wait group is used for graceful shutdowns during downloading
|
|
// and processing
|
|
wg *sync.WaitGroup
|
|
}
|
|
|
|
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
|
|
// with the ethereum network.
|
|
func NewProtocolManager(chainConfig *params.ChainConfig, lightSync bool, networkId uint64, mux *event.TypeMux, engine consensus.Engine, peers *peerSet, blockchain BlockChain, txpool txPool, chainDb ethdb.Database, odr *LesOdr, txrelay *LesTxRelay, quitSync chan struct{}, wg *sync.WaitGroup) (*ProtocolManager, error) {
|
|
// Create the protocol manager with the base fields
|
|
manager := &ProtocolManager{
|
|
lightSync: lightSync,
|
|
eventMux: mux,
|
|
blockchain: blockchain,
|
|
chainConfig: chainConfig,
|
|
chainDb: chainDb,
|
|
odr: odr,
|
|
networkId: networkId,
|
|
txpool: txpool,
|
|
txrelay: txrelay,
|
|
peers: peers,
|
|
newPeerCh: make(chan *peer),
|
|
quitSync: quitSync,
|
|
wg: wg,
|
|
noMorePeers: make(chan struct{}),
|
|
}
|
|
if odr != nil {
|
|
manager.retriever = odr.retriever
|
|
manager.reqDist = odr.retriever.dist
|
|
}
|
|
// Initiate a sub-protocol for every implemented version we can handle
|
|
manager.SubProtocols = make([]p2p.Protocol, 0, len(ProtocolVersions))
|
|
for i, version := range ProtocolVersions {
|
|
// Compatible, initialize the sub-protocol
|
|
version := version // Closure for the run
|
|
manager.SubProtocols = append(manager.SubProtocols, p2p.Protocol{
|
|
Name: "les",
|
|
Version: version,
|
|
Length: ProtocolLengths[i],
|
|
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
|
|
var entry *poolEntry
|
|
peer := manager.newPeer(int(version), networkId, p, rw)
|
|
if manager.serverPool != nil {
|
|
addr := p.RemoteAddr().(*net.TCPAddr)
|
|
entry = manager.serverPool.connect(peer, addr.IP, uint16(addr.Port))
|
|
}
|
|
peer.poolEntry = entry
|
|
select {
|
|
case manager.newPeerCh <- peer:
|
|
manager.wg.Add(1)
|
|
defer manager.wg.Done()
|
|
err := manager.handle(peer)
|
|
if entry != nil {
|
|
manager.serverPool.disconnect(entry)
|
|
}
|
|
return err
|
|
case <-manager.quitSync:
|
|
if entry != nil {
|
|
manager.serverPool.disconnect(entry)
|
|
}
|
|
return p2p.DiscQuitting
|
|
}
|
|
},
|
|
NodeInfo: func() interface{} {
|
|
return manager.NodeInfo()
|
|
},
|
|
PeerInfo: func(id discover.NodeID) interface{} {
|
|
if p := manager.peers.Peer(fmt.Sprintf("%x", id[:8])); p != nil {
|
|
return p.Info()
|
|
}
|
|
return nil
|
|
},
|
|
})
|
|
}
|
|
if len(manager.SubProtocols) == 0 {
|
|
return nil, errIncompatibleConfig
|
|
}
|
|
|
|
removePeer := manager.removePeer
|
|
if disableClientRemovePeer {
|
|
removePeer = func(id string) {}
|
|
}
|
|
|
|
if lightSync {
|
|
manager.downloader = downloader.New(downloader.LightSync, chainDb, manager.eventMux, nil, blockchain, removePeer)
|
|
manager.peers.notify((*downloaderPeerNotify)(manager))
|
|
manager.fetcher = newLightFetcher(manager)
|
|
}
|
|
|
|
return manager, nil
|
|
}
|
|
|
|
// removePeer initiates disconnection from a peer by removing it from the peer set
|
|
func (pm *ProtocolManager) removePeer(id string) {
|
|
pm.peers.Unregister(id)
|
|
}
|
|
|
|
func (pm *ProtocolManager) Start() {
|
|
if pm.lightSync {
|
|
go pm.syncer()
|
|
} else {
|
|
go func() {
|
|
for range pm.newPeerCh {
|
|
}
|
|
}()
|
|
}
|
|
}
|
|
|
|
func (pm *ProtocolManager) Stop() {
|
|
// Showing a log message. During download / process this could actually
|
|
// take between 5 to 10 seconds and therefor feedback is required.
|
|
log.Info("Stopping light Ethereum protocol")
|
|
|
|
// Quit the sync loop.
|
|
// After this send has completed, no new peers will be accepted.
|
|
pm.noMorePeers <- struct{}{}
|
|
|
|
close(pm.quitSync) // quits syncer, fetcher
|
|
|
|
// Disconnect existing sessions.
|
|
// This also closes the gate for any new registrations on the peer set.
|
|
// sessions which are already established but not added to pm.peers yet
|
|
// will exit when they try to register.
|
|
pm.peers.Close()
|
|
|
|
// Wait for any process action
|
|
pm.wg.Wait()
|
|
|
|
log.Info("Light Ethereum protocol stopped")
|
|
}
|
|
|
|
func (pm *ProtocolManager) newPeer(pv int, nv uint64, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
|
|
return newPeer(pv, nv, p, newMeteredMsgWriter(rw))
|
|
}
|
|
|
|
// handle is the callback invoked to manage the life cycle of a les peer. When
|
|
// this function terminates, the peer is disconnected.
|
|
func (pm *ProtocolManager) handle(p *peer) error {
|
|
p.Log().Debug("Light Ethereum peer connected", "name", p.Name())
|
|
|
|
// Execute the LES handshake
|
|
td, head, genesis := pm.blockchain.Status()
|
|
headNum := core.GetBlockNumber(pm.chainDb, head)
|
|
if err := p.Handshake(td, head, headNum, genesis, pm.server); err != nil {
|
|
p.Log().Debug("Light Ethereum handshake failed", "err", err)
|
|
return err
|
|
}
|
|
if rw, ok := p.rw.(*meteredMsgReadWriter); ok {
|
|
rw.Init(p.version)
|
|
}
|
|
// Register the peer locally
|
|
if err := pm.peers.Register(p); err != nil {
|
|
p.Log().Error("Light Ethereum peer registration failed", "err", err)
|
|
return err
|
|
}
|
|
defer func() {
|
|
if pm.server != nil && pm.server.fcManager != nil && p.fcClient != nil {
|
|
p.fcClient.Remove(pm.server.fcManager)
|
|
}
|
|
pm.removePeer(p.id)
|
|
}()
|
|
// Register the peer in the downloader. If the downloader considers it banned, we disconnect
|
|
if pm.lightSync {
|
|
p.lock.Lock()
|
|
head := p.headInfo
|
|
p.lock.Unlock()
|
|
if pm.fetcher != nil {
|
|
pm.fetcher.announce(p, head)
|
|
}
|
|
|
|
if p.poolEntry != nil {
|
|
pm.serverPool.registered(p.poolEntry)
|
|
}
|
|
}
|
|
|
|
stop := make(chan struct{})
|
|
defer close(stop)
|
|
go func() {
|
|
// new block announce loop
|
|
for {
|
|
select {
|
|
case announce := <-p.announceChn:
|
|
p.SendAnnounce(announce)
|
|
case <-stop:
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
|
|
// main loop. handle incoming messages.
|
|
for {
|
|
if err := pm.handleMsg(p); err != nil {
|
|
p.Log().Debug("Light Ethereum message handling failed", "err", err)
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
var reqList = []uint64{GetBlockHeadersMsg, GetBlockBodiesMsg, GetCodeMsg, GetReceiptsMsg, GetProofsMsg, SendTxMsg, GetHeaderProofsMsg}
|
|
|
|
// handleMsg is invoked whenever an inbound message is received from a remote
|
|
// peer. The remote connection is torn down upon returning any error.
|
|
func (pm *ProtocolManager) handleMsg(p *peer) error {
|
|
// Read the next message from the remote peer, and ensure it's fully consumed
|
|
msg, err := p.rw.ReadMsg()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.Log().Trace("Light Ethereum message arrived", "code", msg.Code, "bytes", msg.Size)
|
|
|
|
costs := p.fcCosts[msg.Code]
|
|
reject := func(reqCnt, maxCnt uint64) bool {
|
|
if p.fcClient == nil || reqCnt > maxCnt {
|
|
return true
|
|
}
|
|
bufValue, _ := p.fcClient.AcceptRequest()
|
|
cost := costs.baseCost + reqCnt*costs.reqCost
|
|
if cost > pm.server.defParams.BufLimit {
|
|
cost = pm.server.defParams.BufLimit
|
|
}
|
|
if cost > bufValue {
|
|
recharge := time.Duration((cost - bufValue) * 1000000 / pm.server.defParams.MinRecharge)
|
|
p.Log().Error("Request came too early", "recharge", common.PrettyDuration(recharge))
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
if msg.Size > ProtocolMaxMsgSize {
|
|
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
|
|
}
|
|
defer msg.Discard()
|
|
|
|
var deliverMsg *Msg
|
|
|
|
// Handle the message depending on its contents
|
|
switch msg.Code {
|
|
case StatusMsg:
|
|
p.Log().Trace("Received status message")
|
|
// Status messages should never arrive after the handshake
|
|
return errResp(ErrExtraStatusMsg, "uncontrolled status message")
|
|
|
|
// Block header query, collect the requested headers and reply
|
|
case AnnounceMsg:
|
|
p.Log().Trace("Received announce message")
|
|
|
|
var req announceData
|
|
if err := msg.Decode(&req); err != nil {
|
|
return errResp(ErrDecode, "%v: %v", msg, err)
|
|
}
|
|
p.Log().Trace("Announce message content", "number", req.Number, "hash", req.Hash, "td", req.Td, "reorg", req.ReorgDepth)
|
|
if pm.fetcher != nil {
|
|
pm.fetcher.announce(p, &req)
|
|
}
|
|
|
|
case GetBlockHeadersMsg:
|
|
p.Log().Trace("Received block header request")
|
|
// Decode the complex header query
|
|
var req struct {
|
|
ReqID uint64
|
|
Query getBlockHeadersData
|
|
}
|
|
if err := msg.Decode(&req); err != nil {
|
|
return errResp(ErrDecode, "%v: %v", msg, err)
|
|
}
|
|
|
|
query := req.Query
|
|
if reject(query.Amount, MaxHeaderFetch) {
|
|
return errResp(ErrRequestRejected, "")
|
|
}
|
|
|
|
hashMode := query.Origin.Hash != (common.Hash{})
|
|
|
|
// Gather headers until the fetch or network limits is reached
|
|
var (
|
|
bytes common.StorageSize
|
|
headers []*types.Header
|
|
unknown bool
|
|
)
|
|
for !unknown && len(headers) < int(query.Amount) && bytes < softResponseLimit {
|
|
// Retrieve the next header satisfying the query
|
|
var origin *types.Header
|
|
if hashMode {
|
|
origin = pm.blockchain.GetHeaderByHash(query.Origin.Hash)
|
|
} else {
|
|
origin = pm.blockchain.GetHeaderByNumber(query.Origin.Number)
|
|
}
|
|
if origin == nil {
|
|
break
|
|
}
|
|
number := origin.Number.Uint64()
|
|
headers = append(headers, origin)
|
|
bytes += estHeaderRlpSize
|
|
|
|
// Advance to the next header of the query
|
|
switch {
|
|
case query.Origin.Hash != (common.Hash{}) && query.Reverse:
|
|
// Hash based traversal towards the genesis block
|
|
for i := 0; i < int(query.Skip)+1; i++ {
|
|
if header := pm.blockchain.GetHeader(query.Origin.Hash, number); header != nil {
|
|
query.Origin.Hash = header.ParentHash
|
|
number--
|
|
} else {
|
|
unknown = true
|
|
break
|
|
}
|
|
}
|
|
case query.Origin.Hash != (common.Hash{}) && !query.Reverse:
|
|
// Hash based traversal towards the leaf block
|
|
if header := pm.blockchain.GetHeaderByNumber(origin.Number.Uint64() + query.Skip + 1); header != nil {
|
|
if pm.blockchain.GetBlockHashesFromHash(header.Hash(), query.Skip+1)[query.Skip] == query.Origin.Hash {
|
|
query.Origin.Hash = header.Hash()
|
|
} else {
|
|
unknown = true
|
|
}
|
|
} else {
|
|
unknown = true
|
|
}
|
|
case query.Reverse:
|
|
// Number based traversal towards the genesis block
|
|
if query.Origin.Number >= query.Skip+1 {
|
|
query.Origin.Number -= (query.Skip + 1)
|
|
} else {
|
|
unknown = true
|
|
}
|
|
|
|
case !query.Reverse:
|
|
// Number based traversal towards the leaf block
|
|
query.Origin.Number += (query.Skip + 1)
|
|
}
|
|
}
|
|
|
|
bv, rcost := p.fcClient.RequestProcessed(costs.baseCost + query.Amount*costs.reqCost)
|
|
pm.server.fcCostStats.update(msg.Code, query.Amount, rcost)
|
|
return p.SendBlockHeaders(req.ReqID, bv, headers)
|
|
|
|
case BlockHeadersMsg:
|
|
if pm.downloader == nil {
|
|
return errResp(ErrUnexpectedResponse, "")
|
|
}
|
|
|
|
p.Log().Trace("Received block header response message")
|
|
// A batch of headers arrived to one of our previous requests
|
|
var resp struct {
|
|
ReqID, BV uint64
|
|
Headers []*types.Header
|
|
}
|
|
if err := msg.Decode(&resp); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
p.fcServer.GotReply(resp.ReqID, resp.BV)
|
|
if pm.fetcher != nil && pm.fetcher.requestedID(resp.ReqID) {
|
|
pm.fetcher.deliverHeaders(p, resp.ReqID, resp.Headers)
|
|
} else {
|
|
err := pm.downloader.DeliverHeaders(p.id, resp.Headers)
|
|
if err != nil {
|
|
log.Debug(fmt.Sprint(err))
|
|
}
|
|
}
|
|
|
|
case GetBlockBodiesMsg:
|
|
p.Log().Trace("Received block bodies request")
|
|
// Decode the retrieval message
|
|
var req struct {
|
|
ReqID uint64
|
|
Hashes []common.Hash
|
|
}
|
|
if err := msg.Decode(&req); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Gather blocks until the fetch or network limits is reached
|
|
var (
|
|
bytes int
|
|
bodies []rlp.RawValue
|
|
)
|
|
reqCnt := len(req.Hashes)
|
|
if reject(uint64(reqCnt), MaxBodyFetch) {
|
|
return errResp(ErrRequestRejected, "")
|
|
}
|
|
for _, hash := range req.Hashes {
|
|
if bytes >= softResponseLimit {
|
|
break
|
|
}
|
|
// Retrieve the requested block body, stopping if enough was found
|
|
if data := core.GetBodyRLP(pm.chainDb, hash, core.GetBlockNumber(pm.chainDb, hash)); len(data) != 0 {
|
|
bodies = append(bodies, data)
|
|
bytes += len(data)
|
|
}
|
|
}
|
|
bv, rcost := p.fcClient.RequestProcessed(costs.baseCost + uint64(reqCnt)*costs.reqCost)
|
|
pm.server.fcCostStats.update(msg.Code, uint64(reqCnt), rcost)
|
|
return p.SendBlockBodiesRLP(req.ReqID, bv, bodies)
|
|
|
|
case BlockBodiesMsg:
|
|
if pm.odr == nil {
|
|
return errResp(ErrUnexpectedResponse, "")
|
|
}
|
|
|
|
p.Log().Trace("Received block bodies response")
|
|
// A batch of block bodies arrived to one of our previous requests
|
|
var resp struct {
|
|
ReqID, BV uint64
|
|
Data []*types.Body
|
|
}
|
|
if err := msg.Decode(&resp); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
p.fcServer.GotReply(resp.ReqID, resp.BV)
|
|
deliverMsg = &Msg{
|
|
MsgType: MsgBlockBodies,
|
|
ReqID: resp.ReqID,
|
|
Obj: resp.Data,
|
|
}
|
|
|
|
case GetCodeMsg:
|
|
p.Log().Trace("Received code request")
|
|
// Decode the retrieval message
|
|
var req struct {
|
|
ReqID uint64
|
|
Reqs []CodeReq
|
|
}
|
|
if err := msg.Decode(&req); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Gather state data until the fetch or network limits is reached
|
|
var (
|
|
bytes int
|
|
data [][]byte
|
|
)
|
|
reqCnt := len(req.Reqs)
|
|
if reject(uint64(reqCnt), MaxCodeFetch) {
|
|
return errResp(ErrRequestRejected, "")
|
|
}
|
|
for _, req := range req.Reqs {
|
|
// Retrieve the requested state entry, stopping if enough was found
|
|
if header := core.GetHeader(pm.chainDb, req.BHash, core.GetBlockNumber(pm.chainDb, req.BHash)); header != nil {
|
|
if trie, _ := trie.New(header.Root, pm.chainDb); trie != nil {
|
|
sdata := trie.Get(req.AccKey)
|
|
var acc state.Account
|
|
if err := rlp.DecodeBytes(sdata, &acc); err == nil {
|
|
entry, _ := pm.chainDb.Get(acc.CodeHash)
|
|
if bytes+len(entry) >= softResponseLimit {
|
|
break
|
|
}
|
|
data = append(data, entry)
|
|
bytes += len(entry)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
bv, rcost := p.fcClient.RequestProcessed(costs.baseCost + uint64(reqCnt)*costs.reqCost)
|
|
pm.server.fcCostStats.update(msg.Code, uint64(reqCnt), rcost)
|
|
return p.SendCode(req.ReqID, bv, data)
|
|
|
|
case CodeMsg:
|
|
if pm.odr == nil {
|
|
return errResp(ErrUnexpectedResponse, "")
|
|
}
|
|
|
|
p.Log().Trace("Received code response")
|
|
// A batch of node state data arrived to one of our previous requests
|
|
var resp struct {
|
|
ReqID, BV uint64
|
|
Data [][]byte
|
|
}
|
|
if err := msg.Decode(&resp); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
p.fcServer.GotReply(resp.ReqID, resp.BV)
|
|
deliverMsg = &Msg{
|
|
MsgType: MsgCode,
|
|
ReqID: resp.ReqID,
|
|
Obj: resp.Data,
|
|
}
|
|
|
|
case GetReceiptsMsg:
|
|
p.Log().Trace("Received receipts request")
|
|
// Decode the retrieval message
|
|
var req struct {
|
|
ReqID uint64
|
|
Hashes []common.Hash
|
|
}
|
|
if err := msg.Decode(&req); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Gather state data until the fetch or network limits is reached
|
|
var (
|
|
bytes int
|
|
receipts []rlp.RawValue
|
|
)
|
|
reqCnt := len(req.Hashes)
|
|
if reject(uint64(reqCnt), MaxReceiptFetch) {
|
|
return errResp(ErrRequestRejected, "")
|
|
}
|
|
for _, hash := range req.Hashes {
|
|
if bytes >= softResponseLimit {
|
|
break
|
|
}
|
|
// Retrieve the requested block's receipts, skipping if unknown to us
|
|
results := core.GetBlockReceipts(pm.chainDb, hash, core.GetBlockNumber(pm.chainDb, hash))
|
|
if results == nil {
|
|
if header := pm.blockchain.GetHeaderByHash(hash); header == nil || header.ReceiptHash != types.EmptyRootHash {
|
|
continue
|
|
}
|
|
}
|
|
// If known, encode and queue for response packet
|
|
if encoded, err := rlp.EncodeToBytes(results); err != nil {
|
|
log.Error("Failed to encode receipt", "err", err)
|
|
} else {
|
|
receipts = append(receipts, encoded)
|
|
bytes += len(encoded)
|
|
}
|
|
}
|
|
bv, rcost := p.fcClient.RequestProcessed(costs.baseCost + uint64(reqCnt)*costs.reqCost)
|
|
pm.server.fcCostStats.update(msg.Code, uint64(reqCnt), rcost)
|
|
return p.SendReceiptsRLP(req.ReqID, bv, receipts)
|
|
|
|
case ReceiptsMsg:
|
|
if pm.odr == nil {
|
|
return errResp(ErrUnexpectedResponse, "")
|
|
}
|
|
|
|
p.Log().Trace("Received receipts response")
|
|
// A batch of receipts arrived to one of our previous requests
|
|
var resp struct {
|
|
ReqID, BV uint64
|
|
Receipts []types.Receipts
|
|
}
|
|
if err := msg.Decode(&resp); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
p.fcServer.GotReply(resp.ReqID, resp.BV)
|
|
deliverMsg = &Msg{
|
|
MsgType: MsgReceipts,
|
|
ReqID: resp.ReqID,
|
|
Obj: resp.Receipts,
|
|
}
|
|
|
|
case GetProofsMsg:
|
|
p.Log().Trace("Received proofs request")
|
|
// Decode the retrieval message
|
|
var req struct {
|
|
ReqID uint64
|
|
Reqs []ProofReq
|
|
}
|
|
if err := msg.Decode(&req); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Gather state data until the fetch or network limits is reached
|
|
var (
|
|
bytes int
|
|
proofs proofsData
|
|
)
|
|
reqCnt := len(req.Reqs)
|
|
if reject(uint64(reqCnt), MaxProofsFetch) {
|
|
return errResp(ErrRequestRejected, "")
|
|
}
|
|
for _, req := range req.Reqs {
|
|
if bytes >= softResponseLimit {
|
|
break
|
|
}
|
|
// Retrieve the requested state entry, stopping if enough was found
|
|
if header := core.GetHeader(pm.chainDb, req.BHash, core.GetBlockNumber(pm.chainDb, req.BHash)); header != nil {
|
|
if tr, _ := trie.New(header.Root, pm.chainDb); tr != nil {
|
|
if len(req.AccKey) > 0 {
|
|
sdata := tr.Get(req.AccKey)
|
|
tr = nil
|
|
var acc state.Account
|
|
if err := rlp.DecodeBytes(sdata, &acc); err == nil {
|
|
tr, _ = trie.New(acc.Root, pm.chainDb)
|
|
}
|
|
}
|
|
if tr != nil {
|
|
proof := tr.Prove(req.Key)
|
|
proofs = append(proofs, proof)
|
|
bytes += len(proof)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
bv, rcost := p.fcClient.RequestProcessed(costs.baseCost + uint64(reqCnt)*costs.reqCost)
|
|
pm.server.fcCostStats.update(msg.Code, uint64(reqCnt), rcost)
|
|
return p.SendProofs(req.ReqID, bv, proofs)
|
|
|
|
case ProofsMsg:
|
|
if pm.odr == nil {
|
|
return errResp(ErrUnexpectedResponse, "")
|
|
}
|
|
|
|
p.Log().Trace("Received proofs response")
|
|
// A batch of merkle proofs arrived to one of our previous requests
|
|
var resp struct {
|
|
ReqID, BV uint64
|
|
Data [][]rlp.RawValue
|
|
}
|
|
if err := msg.Decode(&resp); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
p.fcServer.GotReply(resp.ReqID, resp.BV)
|
|
deliverMsg = &Msg{
|
|
MsgType: MsgProofs,
|
|
ReqID: resp.ReqID,
|
|
Obj: resp.Data,
|
|
}
|
|
|
|
case GetHeaderProofsMsg:
|
|
p.Log().Trace("Received headers proof request")
|
|
// Decode the retrieval message
|
|
var req struct {
|
|
ReqID uint64
|
|
Reqs []ChtReq
|
|
}
|
|
if err := msg.Decode(&req); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Gather state data until the fetch or network limits is reached
|
|
var (
|
|
bytes int
|
|
proofs []ChtResp
|
|
)
|
|
reqCnt := len(req.Reqs)
|
|
if reject(uint64(reqCnt), MaxHeaderProofsFetch) {
|
|
return errResp(ErrRequestRejected, "")
|
|
}
|
|
for _, req := range req.Reqs {
|
|
if bytes >= softResponseLimit {
|
|
break
|
|
}
|
|
|
|
if header := pm.blockchain.GetHeaderByNumber(req.BlockNum); header != nil {
|
|
if root := getChtRoot(pm.chainDb, req.ChtNum); root != (common.Hash{}) {
|
|
if tr, _ := trie.New(root, pm.chainDb); tr != nil {
|
|
var encNumber [8]byte
|
|
binary.BigEndian.PutUint64(encNumber[:], req.BlockNum)
|
|
proof := tr.Prove(encNumber[:])
|
|
proofs = append(proofs, ChtResp{Header: header, Proof: proof})
|
|
bytes += len(proof) + estHeaderRlpSize
|
|
}
|
|
}
|
|
}
|
|
}
|
|
bv, rcost := p.fcClient.RequestProcessed(costs.baseCost + uint64(reqCnt)*costs.reqCost)
|
|
pm.server.fcCostStats.update(msg.Code, uint64(reqCnt), rcost)
|
|
return p.SendHeaderProofs(req.ReqID, bv, proofs)
|
|
|
|
case HeaderProofsMsg:
|
|
if pm.odr == nil {
|
|
return errResp(ErrUnexpectedResponse, "")
|
|
}
|
|
|
|
p.Log().Trace("Received headers proof response")
|
|
var resp struct {
|
|
ReqID, BV uint64
|
|
Data []ChtResp
|
|
}
|
|
if err := msg.Decode(&resp); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
p.fcServer.GotReply(resp.ReqID, resp.BV)
|
|
deliverMsg = &Msg{
|
|
MsgType: MsgHeaderProofs,
|
|
ReqID: resp.ReqID,
|
|
Obj: resp.Data,
|
|
}
|
|
|
|
case SendTxMsg:
|
|
if pm.txpool == nil {
|
|
return errResp(ErrUnexpectedResponse, "")
|
|
}
|
|
// Transactions arrived, parse all of them and deliver to the pool
|
|
var txs []*types.Transaction
|
|
if err := msg.Decode(&txs); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
reqCnt := len(txs)
|
|
if reject(uint64(reqCnt), MaxTxSend) {
|
|
return errResp(ErrRequestRejected, "")
|
|
}
|
|
|
|
if err := pm.txpool.AddRemotes(txs); err != nil {
|
|
return errResp(ErrUnexpectedResponse, "msg: %v", err)
|
|
}
|
|
|
|
_, rcost := p.fcClient.RequestProcessed(costs.baseCost + uint64(reqCnt)*costs.reqCost)
|
|
pm.server.fcCostStats.update(msg.Code, uint64(reqCnt), rcost)
|
|
|
|
default:
|
|
p.Log().Trace("Received unknown message", "code", msg.Code)
|
|
return errResp(ErrInvalidMsgCode, "%v", msg.Code)
|
|
}
|
|
|
|
if deliverMsg != nil {
|
|
err := pm.retriever.deliver(p, deliverMsg)
|
|
if err != nil {
|
|
p.responseErrors++
|
|
if p.responseErrors > maxResponseErrors {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// NodeInfo retrieves some protocol metadata about the running host node.
|
|
func (self *ProtocolManager) NodeInfo() *eth.EthNodeInfo {
|
|
return ð.EthNodeInfo{
|
|
Network: self.networkId,
|
|
Difficulty: self.blockchain.GetTdByHash(self.blockchain.LastBlockHash()),
|
|
Genesis: self.blockchain.Genesis().Hash(),
|
|
Head: self.blockchain.LastBlockHash(),
|
|
}
|
|
}
|
|
|
|
// downloaderPeerNotify implements peerSetNotify
|
|
type downloaderPeerNotify ProtocolManager
|
|
|
|
type peerConnection struct {
|
|
manager *ProtocolManager
|
|
peer *peer
|
|
}
|
|
|
|
func (pc *peerConnection) Head() (common.Hash, *big.Int) {
|
|
return pc.peer.HeadAndTd()
|
|
}
|
|
|
|
func (pc *peerConnection) RequestHeadersByHash(origin common.Hash, amount int, skip int, reverse bool) error {
|
|
reqID := genReqID()
|
|
rq := &distReq{
|
|
getCost: func(dp distPeer) uint64 {
|
|
peer := dp.(*peer)
|
|
return peer.GetRequestCost(GetBlockHeadersMsg, amount)
|
|
},
|
|
canSend: func(dp distPeer) bool {
|
|
return dp.(*peer) == pc.peer
|
|
},
|
|
request: func(dp distPeer) func() {
|
|
peer := dp.(*peer)
|
|
cost := peer.GetRequestCost(GetBlockHeadersMsg, amount)
|
|
peer.fcServer.QueueRequest(reqID, cost)
|
|
return func() { peer.RequestHeadersByHash(reqID, cost, origin, amount, skip, reverse) }
|
|
},
|
|
}
|
|
_, ok := <-pc.manager.reqDist.queue(rq)
|
|
if !ok {
|
|
return ErrNoPeers
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (pc *peerConnection) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool) error {
|
|
reqID := genReqID()
|
|
rq := &distReq{
|
|
getCost: func(dp distPeer) uint64 {
|
|
peer := dp.(*peer)
|
|
return peer.GetRequestCost(GetBlockHeadersMsg, amount)
|
|
},
|
|
canSend: func(dp distPeer) bool {
|
|
return dp.(*peer) == pc.peer
|
|
},
|
|
request: func(dp distPeer) func() {
|
|
peer := dp.(*peer)
|
|
cost := peer.GetRequestCost(GetBlockHeadersMsg, amount)
|
|
peer.fcServer.QueueRequest(reqID, cost)
|
|
return func() { peer.RequestHeadersByNumber(reqID, cost, origin, amount, skip, reverse) }
|
|
},
|
|
}
|
|
_, ok := <-pc.manager.reqDist.queue(rq)
|
|
if !ok {
|
|
return ErrNoPeers
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (d *downloaderPeerNotify) registerPeer(p *peer) {
|
|
pm := (*ProtocolManager)(d)
|
|
pc := &peerConnection{
|
|
manager: pm,
|
|
peer: p,
|
|
}
|
|
pm.downloader.RegisterLightPeer(p.id, ethVersion, pc)
|
|
}
|
|
|
|
func (d *downloaderPeerNotify) unregisterPeer(p *peer) {
|
|
pm := (*ProtocolManager)(d)
|
|
pm.downloader.UnregisterPeer(p.id)
|
|
}
|