905 lines
27 KiB
Go
905 lines
27 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package les implements the Light Ethereum Subprotocol.
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package les
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"math/big"
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"net"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discover"
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"github.com/ethereum/go-ethereum/p2p/discv5"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/trie"
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)
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const (
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softResponseLimit = 2 * 1024 * 1024 // Target maximum size of returned blocks, headers or node data.
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estHeaderRlpSize = 500 // Approximate size of an RLP encoded block header
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ethVersion = 63 // equivalent eth version for the downloader
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MaxHeaderFetch = 192 // Amount of block headers to be fetched per retrieval request
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MaxBodyFetch = 32 // Amount of block bodies to be fetched per retrieval request
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MaxReceiptFetch = 128 // Amount of transaction receipts to allow fetching per request
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MaxCodeFetch = 64 // Amount of contract codes to allow fetching per request
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MaxProofsFetch = 64 // Amount of merkle proofs to be fetched per retrieval request
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MaxHeaderProofsFetch = 64 // Amount of merkle proofs to be fetched per retrieval request
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MaxTxSend = 64 // Amount of transactions to be send per request
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disableClientRemovePeer = false
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)
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// errIncompatibleConfig is returned if the requested protocols and configs are
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// not compatible (low protocol version restrictions and high requirements).
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var errIncompatibleConfig = errors.New("incompatible configuration")
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func errResp(code errCode, format string, v ...interface{}) error {
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return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
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}
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type BlockChain interface {
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HasHeader(hash common.Hash) bool
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GetHeader(hash common.Hash, number uint64) *types.Header
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GetHeaderByHash(hash common.Hash) *types.Header
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CurrentHeader() *types.Header
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GetTdByHash(hash common.Hash) *big.Int
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InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error)
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Rollback(chain []common.Hash)
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Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash)
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GetHeaderByNumber(number uint64) *types.Header
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GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash
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LastBlockHash() common.Hash
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Genesis() *types.Block
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}
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type txPool interface {
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// AddRemotes should add the given transactions to the pool.
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AddRemotes([]*types.Transaction) error
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}
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type ProtocolManager struct {
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lightSync bool
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txpool txPool
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txrelay *LesTxRelay
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networkId uint64
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chainConfig *params.ChainConfig
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blockchain BlockChain
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chainDb ethdb.Database
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odr *LesOdr
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server *LesServer
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serverPool *serverPool
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lesTopic discv5.Topic
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reqDist *requestDistributor
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retriever *retrieveManager
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downloader *downloader.Downloader
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fetcher *lightFetcher
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peers *peerSet
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SubProtocols []p2p.Protocol
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eventMux *event.TypeMux
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// channels for fetcher, syncer, txsyncLoop
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newPeerCh chan *peer
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quitSync chan struct{}
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noMorePeers chan struct{}
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// wait group is used for graceful shutdowns during downloading
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// and processing
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wg *sync.WaitGroup
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}
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// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
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// with the ethereum network.
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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) {
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// Create the protocol manager with the base fields
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manager := &ProtocolManager{
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lightSync: lightSync,
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eventMux: mux,
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blockchain: blockchain,
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chainConfig: chainConfig,
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chainDb: chainDb,
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odr: odr,
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networkId: networkId,
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txpool: txpool,
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txrelay: txrelay,
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peers: peers,
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newPeerCh: make(chan *peer),
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quitSync: quitSync,
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wg: wg,
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noMorePeers: make(chan struct{}),
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}
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if odr != nil {
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manager.retriever = odr.retriever
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manager.reqDist = odr.retriever.dist
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}
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// Initiate a sub-protocol for every implemented version we can handle
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manager.SubProtocols = make([]p2p.Protocol, 0, len(ProtocolVersions))
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for i, version := range ProtocolVersions {
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// Compatible, initialize the sub-protocol
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version := version // Closure for the run
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manager.SubProtocols = append(manager.SubProtocols, p2p.Protocol{
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Name: "les",
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Version: version,
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Length: ProtocolLengths[i],
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Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
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var entry *poolEntry
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peer := manager.newPeer(int(version), networkId, p, rw)
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if manager.serverPool != nil {
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addr := p.RemoteAddr().(*net.TCPAddr)
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entry = manager.serverPool.connect(peer, addr.IP, uint16(addr.Port))
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}
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peer.poolEntry = entry
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select {
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case manager.newPeerCh <- peer:
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manager.wg.Add(1)
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defer manager.wg.Done()
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err := manager.handle(peer)
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if entry != nil {
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manager.serverPool.disconnect(entry)
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}
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return err
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case <-manager.quitSync:
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if entry != nil {
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manager.serverPool.disconnect(entry)
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}
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return p2p.DiscQuitting
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}
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},
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NodeInfo: func() interface{} {
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return manager.NodeInfo()
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},
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PeerInfo: func(id discover.NodeID) interface{} {
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if p := manager.peers.Peer(fmt.Sprintf("%x", id[:8])); p != nil {
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return p.Info()
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}
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return nil
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},
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})
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}
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if len(manager.SubProtocols) == 0 {
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return nil, errIncompatibleConfig
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}
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removePeer := manager.removePeer
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if disableClientRemovePeer {
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removePeer = func(id string) {}
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}
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if lightSync {
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manager.downloader = downloader.New(downloader.LightSync, chainDb, manager.eventMux, nil, blockchain, removePeer)
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manager.peers.notify((*downloaderPeerNotify)(manager))
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manager.fetcher = newLightFetcher(manager)
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}
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return manager, nil
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}
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// removePeer initiates disconnection from a peer by removing it from the peer set
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func (pm *ProtocolManager) removePeer(id string) {
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pm.peers.Unregister(id)
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}
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func (pm *ProtocolManager) Start() {
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if pm.lightSync {
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go pm.syncer()
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} else {
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go func() {
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for range pm.newPeerCh {
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}
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}()
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}
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}
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func (pm *ProtocolManager) Stop() {
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// Showing a log message. During download / process this could actually
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// take between 5 to 10 seconds and therefor feedback is required.
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log.Info("Stopping light Ethereum protocol")
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// Quit the sync loop.
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// After this send has completed, no new peers will be accepted.
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pm.noMorePeers <- struct{}{}
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close(pm.quitSync) // quits syncer, fetcher
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// Disconnect existing sessions.
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// This also closes the gate for any new registrations on the peer set.
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// sessions which are already established but not added to pm.peers yet
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// will exit when they try to register.
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pm.peers.Close()
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// Wait for any process action
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pm.wg.Wait()
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log.Info("Light Ethereum protocol stopped")
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}
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func (pm *ProtocolManager) newPeer(pv int, nv uint64, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
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return newPeer(pv, nv, p, newMeteredMsgWriter(rw))
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}
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// handle is the callback invoked to manage the life cycle of a les peer. When
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// this function terminates, the peer is disconnected.
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func (pm *ProtocolManager) handle(p *peer) error {
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p.Log().Debug("Light Ethereum peer connected", "name", p.Name())
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// Execute the LES handshake
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td, head, genesis := pm.blockchain.Status()
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headNum := core.GetBlockNumber(pm.chainDb, head)
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if err := p.Handshake(td, head, headNum, genesis, pm.server); err != nil {
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p.Log().Debug("Light Ethereum handshake failed", "err", err)
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return err
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}
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if rw, ok := p.rw.(*meteredMsgReadWriter); ok {
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rw.Init(p.version)
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}
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// Register the peer locally
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if err := pm.peers.Register(p); err != nil {
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p.Log().Error("Light Ethereum peer registration failed", "err", err)
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return err
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}
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defer func() {
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if pm.server != nil && pm.server.fcManager != nil && p.fcClient != nil {
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p.fcClient.Remove(pm.server.fcManager)
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}
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pm.removePeer(p.id)
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}()
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// Register the peer in the downloader. If the downloader considers it banned, we disconnect
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if pm.lightSync {
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p.lock.Lock()
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head := p.headInfo
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p.lock.Unlock()
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if pm.fetcher != nil {
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pm.fetcher.announce(p, head)
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}
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if p.poolEntry != nil {
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pm.serverPool.registered(p.poolEntry)
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}
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}
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stop := make(chan struct{})
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defer close(stop)
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go func() {
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// new block announce loop
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for {
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select {
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case announce := <-p.announceChn:
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p.SendAnnounce(announce)
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case <-stop:
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return
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}
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}
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}()
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// main loop. handle incoming messages.
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for {
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if err := pm.handleMsg(p); err != nil {
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p.Log().Debug("Light Ethereum message handling failed", "err", err)
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return err
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}
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}
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}
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var reqList = []uint64{GetBlockHeadersMsg, GetBlockBodiesMsg, GetCodeMsg, GetReceiptsMsg, GetProofsMsg, SendTxMsg, GetHeaderProofsMsg}
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// handleMsg is invoked whenever an inbound message is received from a remote
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// peer. The remote connection is torn down upon returning any error.
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func (pm *ProtocolManager) handleMsg(p *peer) error {
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// Read the next message from the remote peer, and ensure it's fully consumed
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msg, err := p.rw.ReadMsg()
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if err != nil {
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return err
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}
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p.Log().Trace("Light Ethereum message arrived", "code", msg.Code, "bytes", msg.Size)
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costs := p.fcCosts[msg.Code]
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reject := func(reqCnt, maxCnt uint64) bool {
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if p.fcClient == nil || reqCnt > maxCnt {
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return true
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}
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bufValue, _ := p.fcClient.AcceptRequest()
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cost := costs.baseCost + reqCnt*costs.reqCost
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if cost > pm.server.defParams.BufLimit {
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cost = pm.server.defParams.BufLimit
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}
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if cost > bufValue {
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recharge := time.Duration((cost - bufValue) * 1000000 / pm.server.defParams.MinRecharge)
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p.Log().Error("Request came too early", "recharge", common.PrettyDuration(recharge))
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return true
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}
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return false
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}
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if msg.Size > ProtocolMaxMsgSize {
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return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
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}
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defer msg.Discard()
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var deliverMsg *Msg
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// Handle the message depending on its contents
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switch msg.Code {
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case StatusMsg:
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p.Log().Trace("Received status message")
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// Status messages should never arrive after the handshake
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return errResp(ErrExtraStatusMsg, "uncontrolled status message")
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// Block header query, collect the requested headers and reply
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case AnnounceMsg:
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p.Log().Trace("Received announce message")
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var req announceData
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if err := msg.Decode(&req); err != nil {
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return errResp(ErrDecode, "%v: %v", msg, err)
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}
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p.Log().Trace("Announce message content", "number", req.Number, "hash", req.Hash, "td", req.Td, "reorg", req.ReorgDepth)
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if pm.fetcher != nil {
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pm.fetcher.announce(p, &req)
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}
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case GetBlockHeadersMsg:
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p.Log().Trace("Received block header request")
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// Decode the complex header query
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var req struct {
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ReqID uint64
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Query getBlockHeadersData
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}
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if err := msg.Decode(&req); err != nil {
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return errResp(ErrDecode, "%v: %v", msg, err)
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}
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query := req.Query
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if reject(query.Amount, MaxHeaderFetch) {
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return errResp(ErrRequestRejected, "")
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}
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hashMode := query.Origin.Hash != (common.Hash{})
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// Gather headers until the fetch or network limits is reached
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var (
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bytes common.StorageSize
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headers []*types.Header
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unknown bool
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)
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for !unknown && len(headers) < int(query.Amount) && bytes < softResponseLimit {
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// Retrieve the next header satisfying the query
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var origin *types.Header
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if hashMode {
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origin = pm.blockchain.GetHeaderByHash(query.Origin.Hash)
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} else {
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origin = pm.blockchain.GetHeaderByNumber(query.Origin.Number)
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}
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if origin == nil {
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break
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}
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number := origin.Number.Uint64()
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headers = append(headers, origin)
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bytes += estHeaderRlpSize
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// Advance to the next header of the query
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switch {
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case query.Origin.Hash != (common.Hash{}) && query.Reverse:
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// Hash based traversal towards the genesis block
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for i := 0; i < int(query.Skip)+1; i++ {
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if header := pm.blockchain.GetHeader(query.Origin.Hash, number); header != nil {
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query.Origin.Hash = header.ParentHash
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number--
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} else {
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unknown = true
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break
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}
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}
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case query.Origin.Hash != (common.Hash{}) && !query.Reverse:
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// Hash based traversal towards the leaf block
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if header := pm.blockchain.GetHeaderByNumber(origin.Number.Uint64() + query.Skip + 1); header != nil {
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if pm.blockchain.GetBlockHashesFromHash(header.Hash(), query.Skip+1)[query.Skip] == query.Origin.Hash {
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query.Origin.Hash = header.Hash()
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} else {
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unknown = true
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}
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} else {
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unknown = true
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}
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case query.Reverse:
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// Number based traversal towards the genesis block
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if query.Origin.Number >= query.Skip+1 {
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query.Origin.Number -= (query.Skip + 1)
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} else {
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unknown = true
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}
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case !query.Reverse:
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// Number based traversal towards the leaf block
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query.Origin.Number += (query.Skip + 1)
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}
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}
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bv, rcost := p.fcClient.RequestProcessed(costs.baseCost + query.Amount*costs.reqCost)
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pm.server.fcCostStats.update(msg.Code, query.Amount, rcost)
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return p.SendBlockHeaders(req.ReqID, bv, headers)
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case BlockHeadersMsg:
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if pm.downloader == nil {
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return errResp(ErrUnexpectedResponse, "")
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}
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p.Log().Trace("Received block header response message")
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// A batch of headers arrived to one of our previous requests
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var resp struct {
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ReqID, BV uint64
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Headers []*types.Header
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}
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if err := msg.Decode(&resp); err != nil {
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return errResp(ErrDecode, "msg %v: %v", msg, err)
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}
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p.fcServer.GotReply(resp.ReqID, resp.BV)
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if pm.fetcher != nil && pm.fetcher.requestedID(resp.ReqID) {
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pm.fetcher.deliverHeaders(p, resp.ReqID, resp.Headers)
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} else {
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err := pm.downloader.DeliverHeaders(p.id, resp.Headers)
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if err != nil {
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log.Debug(fmt.Sprint(err))
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}
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}
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case GetBlockBodiesMsg:
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p.Log().Trace("Received block bodies request")
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// Decode the retrieval message
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var req struct {
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ReqID uint64
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Hashes []common.Hash
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}
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if err := msg.Decode(&req); err != nil {
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return errResp(ErrDecode, "msg %v: %v", msg, err)
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}
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// Gather blocks until the fetch or network limits is reached
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var (
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bytes int
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bodies []rlp.RawValue
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)
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reqCnt := len(req.Hashes)
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if reject(uint64(reqCnt), MaxBodyFetch) {
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return errResp(ErrRequestRejected, "")
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}
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for _, hash := range req.Hashes {
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if bytes >= softResponseLimit {
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break
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}
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// Retrieve the requested block body, stopping if enough was found
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if data := core.GetBodyRLP(pm.chainDb, hash, core.GetBlockNumber(pm.chainDb, hash)); len(data) != 0 {
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bodies = append(bodies, data)
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bytes += len(data)
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}
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}
|
|
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)
|
|
}
|