mirror of https://github.com/ethereum/go-ethereum
gary rong
5 years ago
committed by
Felföldi Zsolt
parent
4aee0d1994
commit
2ed729d38e
@ -0,0 +1,401 @@ |
||||
// Copyright 2019 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" |
||||
"sync" |
||||
"time" |
||||
|
||||
"github.com/ethereum/go-ethereum/common" |
||||
"github.com/ethereum/go-ethereum/common/mclock" |
||||
"github.com/ethereum/go-ethereum/core/types" |
||||
"github.com/ethereum/go-ethereum/eth/downloader" |
||||
"github.com/ethereum/go-ethereum/light" |
||||
"github.com/ethereum/go-ethereum/log" |
||||
"github.com/ethereum/go-ethereum/p2p" |
||||
"github.com/ethereum/go-ethereum/params" |
||||
) |
||||
|
||||
// clientHandler is responsible for receiving and processing all incoming server
|
||||
// responses.
|
||||
type clientHandler struct { |
||||
ulc *ulc |
||||
checkpoint *params.TrustedCheckpoint |
||||
fetcher *lightFetcher |
||||
downloader *downloader.Downloader |
||||
backend *LightEthereum |
||||
|
||||
closeCh chan struct{} |
||||
wg sync.WaitGroup // WaitGroup used to track all connected peers.
|
||||
} |
||||
|
||||
func newClientHandler(ulcServers []string, ulcFraction int, checkpoint *params.TrustedCheckpoint, backend *LightEthereum) *clientHandler { |
||||
handler := &clientHandler{ |
||||
backend: backend, |
||||
closeCh: make(chan struct{}), |
||||
} |
||||
if ulcServers != nil { |
||||
ulc, err := newULC(ulcServers, ulcFraction) |
||||
if err != nil { |
||||
log.Error("Failed to initialize ultra light client") |
||||
} |
||||
handler.ulc = ulc |
||||
log.Info("Enable ultra light client mode") |
||||
} |
||||
var height uint64 |
||||
if checkpoint != nil { |
||||
height = (checkpoint.SectionIndex+1)*params.CHTFrequency - 1 |
||||
} |
||||
handler.fetcher = newLightFetcher(handler) |
||||
handler.downloader = downloader.New(height, backend.chainDb, nil, backend.eventMux, nil, backend.blockchain, handler.removePeer) |
||||
handler.backend.peers.notify((*downloaderPeerNotify)(handler)) |
||||
return handler |
||||
} |
||||
|
||||
func (h *clientHandler) stop() { |
||||
close(h.closeCh) |
||||
h.downloader.Terminate() |
||||
h.fetcher.close() |
||||
h.wg.Wait() |
||||
} |
||||
|
||||
// runPeer is the p2p protocol run function for the given version.
|
||||
func (h *clientHandler) runPeer(version uint, p *p2p.Peer, rw p2p.MsgReadWriter) error { |
||||
trusted := false |
||||
if h.ulc != nil { |
||||
trusted = h.ulc.trusted(p.ID()) |
||||
} |
||||
peer := newPeer(int(version), h.backend.config.NetworkId, trusted, p, newMeteredMsgWriter(rw, int(version))) |
||||
peer.poolEntry = h.backend.serverPool.connect(peer, peer.Node()) |
||||
if peer.poolEntry == nil { |
||||
return p2p.DiscRequested |
||||
} |
||||
h.wg.Add(1) |
||||
defer h.wg.Done() |
||||
err := h.handle(peer) |
||||
h.backend.serverPool.disconnect(peer.poolEntry) |
||||
return err |
||||
} |
||||
|
||||
func (h *clientHandler) handle(p *peer) error { |
||||
if h.backend.peers.Len() >= h.backend.config.LightPeers && !p.Peer.Info().Network.Trusted { |
||||
return p2p.DiscTooManyPeers |
||||
} |
||||
p.Log().Debug("Light Ethereum peer connected", "name", p.Name()) |
||||
|
||||
// Execute the LES handshake
|
||||
var ( |
||||
head = h.backend.blockchain.CurrentHeader() |
||||
hash = head.Hash() |
||||
number = head.Number.Uint64() |
||||
td = h.backend.blockchain.GetTd(hash, number) |
||||
) |
||||
if err := p.Handshake(td, hash, number, h.backend.blockchain.Genesis().Hash(), nil); err != nil { |
||||
p.Log().Debug("Light Ethereum handshake failed", "err", err) |
||||
return err |
||||
} |
||||
// Register the peer locally
|
||||
if err := h.backend.peers.Register(p); err != nil { |
||||
p.Log().Error("Light Ethereum peer registration failed", "err", err) |
||||
return err |
||||
} |
||||
serverConnectionGauge.Update(int64(h.backend.peers.Len())) |
||||
|
||||
connectedAt := mclock.Now() |
||||
defer func() { |
||||
h.backend.peers.Unregister(p.id) |
||||
connectionTimer.Update(time.Duration(mclock.Now() - connectedAt)) |
||||
serverConnectionGauge.Update(int64(h.backend.peers.Len())) |
||||
}() |
||||
|
||||
h.fetcher.announce(p, p.headInfo) |
||||
|
||||
// pool entry can be nil during the unit test.
|
||||
if p.poolEntry != nil { |
||||
h.backend.serverPool.registered(p.poolEntry) |
||||
} |
||||
// Spawn a main loop to handle all incoming messages.
|
||||
for { |
||||
if err := h.handleMsg(p); err != nil { |
||||
p.Log().Debug("Light Ethereum message handling failed", "err", err) |
||||
p.fcServer.DumpLogs() |
||||
return err |
||||
} |
||||
} |
||||
} |
||||
|
||||
// handleMsg is invoked whenever an inbound message is received from a remote
|
||||
// peer. The remote connection is torn down upon returning any error.
|
||||
func (h *clientHandler) 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) |
||||
|
||||
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 AnnounceMsg: |
||||
p.Log().Trace("Received announce message") |
||||
var req announceData |
||||
if err := msg.Decode(&req); err != nil { |
||||
return errResp(ErrDecode, "%v: %v", msg, err) |
||||
} |
||||
if err := req.sanityCheck(); err != nil { |
||||
return err |
||||
} |
||||
update, size := req.Update.decode() |
||||
if p.rejectUpdate(size) { |
||||
return errResp(ErrRequestRejected, "") |
||||
} |
||||
p.updateFlowControl(update) |
||||
|
||||
if req.Hash != (common.Hash{}) { |
||||
if p.announceType == announceTypeNone { |
||||
return errResp(ErrUnexpectedResponse, "") |
||||
} |
||||
if p.announceType == announceTypeSigned { |
||||
if err := req.checkSignature(p.ID(), update); err != nil { |
||||
p.Log().Trace("Invalid announcement signature", "err", err) |
||||
return err |
||||
} |
||||
p.Log().Trace("Valid announcement signature") |
||||
} |
||||
p.Log().Trace("Announce message content", "number", req.Number, "hash", req.Hash, "td", req.Td, "reorg", req.ReorgDepth) |
||||
h.fetcher.announce(p, &req) |
||||
} |
||||
case BlockHeadersMsg: |
||||
p.Log().Trace("Received block header response message") |
||||
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.ReceivedReply(resp.ReqID, resp.BV) |
||||
if h.fetcher.requestedID(resp.ReqID) { |
||||
h.fetcher.deliverHeaders(p, resp.ReqID, resp.Headers) |
||||
} else { |
||||
if err := h.downloader.DeliverHeaders(p.id, resp.Headers); err != nil { |
||||
log.Debug("Failed to deliver headers", "err", err) |
||||
} |
||||
} |
||||
case BlockBodiesMsg: |
||||
p.Log().Trace("Received block bodies response") |
||||
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.ReceivedReply(resp.ReqID, resp.BV) |
||||
deliverMsg = &Msg{ |
||||
MsgType: MsgBlockBodies, |
||||
ReqID: resp.ReqID, |
||||
Obj: resp.Data, |
||||
} |
||||
case CodeMsg: |
||||
p.Log().Trace("Received code response") |
||||
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.ReceivedReply(resp.ReqID, resp.BV) |
||||
deliverMsg = &Msg{ |
||||
MsgType: MsgCode, |
||||
ReqID: resp.ReqID, |
||||
Obj: resp.Data, |
||||
} |
||||
case ReceiptsMsg: |
||||
p.Log().Trace("Received receipts response") |
||||
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.ReceivedReply(resp.ReqID, resp.BV) |
||||
deliverMsg = &Msg{ |
||||
MsgType: MsgReceipts, |
||||
ReqID: resp.ReqID, |
||||
Obj: resp.Receipts, |
||||
} |
||||
case ProofsV2Msg: |
||||
p.Log().Trace("Received les/2 proofs response") |
||||
var resp struct { |
||||
ReqID, BV uint64 |
||||
Data light.NodeList |
||||
} |
||||
if err := msg.Decode(&resp); err != nil { |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
p.fcServer.ReceivedReply(resp.ReqID, resp.BV) |
||||
deliverMsg = &Msg{ |
||||
MsgType: MsgProofsV2, |
||||
ReqID: resp.ReqID, |
||||
Obj: resp.Data, |
||||
} |
||||
case HelperTrieProofsMsg: |
||||
p.Log().Trace("Received helper trie proof response") |
||||
var resp struct { |
||||
ReqID, BV uint64 |
||||
Data HelperTrieResps |
||||
} |
||||
if err := msg.Decode(&resp); err != nil { |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
p.fcServer.ReceivedReply(resp.ReqID, resp.BV) |
||||
deliverMsg = &Msg{ |
||||
MsgType: MsgHelperTrieProofs, |
||||
ReqID: resp.ReqID, |
||||
Obj: resp.Data, |
||||
} |
||||
case TxStatusMsg: |
||||
p.Log().Trace("Received tx status response") |
||||
var resp struct { |
||||
ReqID, BV uint64 |
||||
Status []light.TxStatus |
||||
} |
||||
if err := msg.Decode(&resp); err != nil { |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
p.fcServer.ReceivedReply(resp.ReqID, resp.BV) |
||||
deliverMsg = &Msg{ |
||||
MsgType: MsgTxStatus, |
||||
ReqID: resp.ReqID, |
||||
Obj: resp.Status, |
||||
} |
||||
case StopMsg: |
||||
p.freezeServer(true) |
||||
h.backend.retriever.frozen(p) |
||||
p.Log().Debug("Service stopped") |
||||
case ResumeMsg: |
||||
var bv uint64 |
||||
if err := msg.Decode(&bv); err != nil { |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
p.fcServer.ResumeFreeze(bv) |
||||
p.freezeServer(false) |
||||
p.Log().Debug("Service resumed") |
||||
default: |
||||
p.Log().Trace("Received invalid message", "code", msg.Code) |
||||
return errResp(ErrInvalidMsgCode, "%v", msg.Code) |
||||
} |
||||
// Deliver the received response to retriever.
|
||||
if deliverMsg != nil { |
||||
if err := h.backend.retriever.deliver(p, deliverMsg); err != nil { |
||||
p.responseErrors++ |
||||
if p.responseErrors > maxResponseErrors { |
||||
return err |
||||
} |
||||
} |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
func (h *clientHandler) removePeer(id string) { |
||||
h.backend.peers.Unregister(id) |
||||
} |
||||
|
||||
type peerConnection struct { |
||||
handler *clientHandler |
||||
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 { |
||||
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() { |
||||
reqID := genReqID() |
||||
peer := dp.(*peer) |
||||
cost := peer.GetRequestCost(GetBlockHeadersMsg, amount) |
||||
peer.fcServer.QueuedRequest(reqID, cost) |
||||
return func() { peer.RequestHeadersByHash(reqID, cost, origin, amount, skip, reverse) } |
||||
}, |
||||
} |
||||
_, ok := <-pc.handler.backend.reqDist.queue(rq) |
||||
if !ok { |
||||
return light.ErrNoPeers |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
func (pc *peerConnection) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool) error { |
||||
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() { |
||||
reqID := genReqID() |
||||
peer := dp.(*peer) |
||||
cost := peer.GetRequestCost(GetBlockHeadersMsg, amount) |
||||
peer.fcServer.QueuedRequest(reqID, cost) |
||||
return func() { peer.RequestHeadersByNumber(reqID, cost, origin, amount, skip, reverse) } |
||||
}, |
||||
} |
||||
_, ok := <-pc.handler.backend.reqDist.queue(rq) |
||||
if !ok { |
||||
return light.ErrNoPeers |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
// downloaderPeerNotify implements peerSetNotify
|
||||
type downloaderPeerNotify clientHandler |
||||
|
||||
func (d *downloaderPeerNotify) registerPeer(p *peer) { |
||||
h := (*clientHandler)(d) |
||||
pc := &peerConnection{ |
||||
handler: h, |
||||
peer: p, |
||||
} |
||||
h.downloader.RegisterLightPeer(p.id, ethVersion, pc) |
||||
} |
||||
|
||||
func (d *downloaderPeerNotify) unregisterPeer(p *peer) { |
||||
h := (*clientHandler)(d) |
||||
h.downloader.UnregisterPeer(p.id) |
||||
} |
||||
@ -1,168 +0,0 @@ |
||||
// Copyright 2019 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" |
||||
|
||||
"net" |
||||
|
||||
"github.com/ethereum/go-ethereum/common" |
||||
"github.com/ethereum/go-ethereum/core/types" |
||||
"github.com/ethereum/go-ethereum/crypto" |
||||
"github.com/ethereum/go-ethereum/p2p" |
||||
"github.com/ethereum/go-ethereum/p2p/enode" |
||||
) |
||||
|
||||
func TestFetcherULCPeerSelector(t *testing.T) { |
||||
id1 := newNodeID(t).ID() |
||||
id2 := newNodeID(t).ID() |
||||
id3 := newNodeID(t).ID() |
||||
id4 := newNodeID(t).ID() |
||||
|
||||
ftn1 := &fetcherTreeNode{ |
||||
hash: common.HexToHash("1"), |
||||
td: big.NewInt(1), |
||||
} |
||||
ftn2 := &fetcherTreeNode{ |
||||
hash: common.HexToHash("2"), |
||||
td: big.NewInt(2), |
||||
parent: ftn1, |
||||
} |
||||
ftn3 := &fetcherTreeNode{ |
||||
hash: common.HexToHash("3"), |
||||
td: big.NewInt(3), |
||||
parent: ftn2, |
||||
} |
||||
lf := lightFetcher{ |
||||
pm: &ProtocolManager{ |
||||
ulc: &ulc{ |
||||
keys: map[string]bool{ |
||||
id1.String(): true, |
||||
id2.String(): true, |
||||
id3.String(): true, |
||||
id4.String(): true, |
||||
}, |
||||
fraction: 70, |
||||
}, |
||||
}, |
||||
maxConfirmedTd: ftn1.td, |
||||
|
||||
peers: map[*peer]*fetcherPeerInfo{ |
||||
{ |
||||
id: "peer1", |
||||
Peer: p2p.NewPeer(id1, "peer1", []p2p.Cap{}), |
||||
trusted: true, |
||||
}: { |
||||
nodeByHash: map[common.Hash]*fetcherTreeNode{ |
||||
ftn1.hash: ftn1, |
||||
ftn2.hash: ftn2, |
||||
}, |
||||
}, |
||||
{ |
||||
Peer: p2p.NewPeer(id2, "peer2", []p2p.Cap{}), |
||||
id: "peer2", |
||||
trusted: true, |
||||
}: { |
||||
nodeByHash: map[common.Hash]*fetcherTreeNode{ |
||||
ftn1.hash: ftn1, |
||||
ftn2.hash: ftn2, |
||||
}, |
||||
}, |
||||
{ |
||||
id: "peer3", |
||||
Peer: p2p.NewPeer(id3, "peer3", []p2p.Cap{}), |
||||
trusted: true, |
||||
}: { |
||||
nodeByHash: map[common.Hash]*fetcherTreeNode{ |
||||
ftn1.hash: ftn1, |
||||
ftn2.hash: ftn2, |
||||
ftn3.hash: ftn3, |
||||
}, |
||||
}, |
||||
{ |
||||
id: "peer4", |
||||
Peer: p2p.NewPeer(id4, "peer4", []p2p.Cap{}), |
||||
trusted: true, |
||||
}: { |
||||
nodeByHash: map[common.Hash]*fetcherTreeNode{ |
||||
ftn1.hash: ftn1, |
||||
}, |
||||
}, |
||||
}, |
||||
chain: &lightChainStub{ |
||||
tds: map[common.Hash]*big.Int{}, |
||||
headers: map[common.Hash]*types.Header{ |
||||
ftn1.hash: {}, |
||||
ftn2.hash: {}, |
||||
ftn3.hash: {}, |
||||
}, |
||||
}, |
||||
} |
||||
bestHash, bestAmount, bestTD, sync := lf.findBestRequest() |
||||
|
||||
if bestTD == nil { |
||||
t.Fatal("Empty result") |
||||
} |
||||
|
||||
if bestTD.Cmp(ftn2.td) != 0 { |
||||
t.Fatal("bad td", bestTD) |
||||
} |
||||
if bestHash != ftn2.hash { |
||||
t.Fatal("bad hash", bestTD) |
||||
} |
||||
|
||||
_, _ = bestAmount, sync |
||||
} |
||||
|
||||
type lightChainStub struct { |
||||
BlockChain |
||||
tds map[common.Hash]*big.Int |
||||
headers map[common.Hash]*types.Header |
||||
insertHeaderChainAssertFunc func(chain []*types.Header, checkFreq int) (int, error) |
||||
} |
||||
|
||||
func (l *lightChainStub) GetHeader(hash common.Hash, number uint64) *types.Header { |
||||
if h, ok := l.headers[hash]; ok { |
||||
return h |
||||
} |
||||
|
||||
return nil |
||||
} |
||||
|
||||
func (l *lightChainStub) LockChain() {} |
||||
func (l *lightChainStub) UnlockChain() {} |
||||
|
||||
func (l *lightChainStub) GetTd(hash common.Hash, number uint64) *big.Int { |
||||
if td, ok := l.tds[hash]; ok { |
||||
return td |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
func (l *lightChainStub) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) { |
||||
return l.insertHeaderChainAssertFunc(chain, checkFreq) |
||||
} |
||||
|
||||
func newNodeID(t *testing.T) *enode.Node { |
||||
key, err := crypto.GenerateKey() |
||||
if err != nil { |
||||
t.Fatal("generate key err:", err) |
||||
} |
||||
return enode.NewV4(&key.PublicKey, net.IP{}, 35000, 35000) |
||||
} |
||||
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,921 @@ |
||||
// Copyright 2019 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 ( |
||||
"encoding/binary" |
||||
"encoding/json" |
||||
"errors" |
||||
"sync" |
||||
"sync/atomic" |
||||
"time" |
||||
|
||||
"github.com/ethereum/go-ethereum/common" |
||||
"github.com/ethereum/go-ethereum/common/mclock" |
||||
"github.com/ethereum/go-ethereum/core" |
||||
"github.com/ethereum/go-ethereum/core/rawdb" |
||||
"github.com/ethereum/go-ethereum/core/state" |
||||
"github.com/ethereum/go-ethereum/core/types" |
||||
"github.com/ethereum/go-ethereum/ethdb" |
||||
"github.com/ethereum/go-ethereum/light" |
||||
"github.com/ethereum/go-ethereum/log" |
||||
"github.com/ethereum/go-ethereum/metrics" |
||||
"github.com/ethereum/go-ethereum/p2p" |
||||
"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
|
||||
MaxHelperTrieProofsFetch = 64 // Amount of helper tries to be fetched per retrieval request
|
||||
MaxTxSend = 64 // Amount of transactions to be send per request
|
||||
MaxTxStatus = 256 // Amount of transactions to queried per request
|
||||
) |
||||
|
||||
var errTooManyInvalidRequest = errors.New("too many invalid requests made") |
||||
|
||||
// serverHandler is responsible for serving light client and process
|
||||
// all incoming light requests.
|
||||
type serverHandler struct { |
||||
blockchain *core.BlockChain |
||||
chainDb ethdb.Database |
||||
txpool *core.TxPool |
||||
server *LesServer |
||||
|
||||
closeCh chan struct{} // Channel used to exit all background routines of handler.
|
||||
wg sync.WaitGroup // WaitGroup used to track all background routines of handler.
|
||||
synced func() bool // Callback function used to determine whether local node is synced.
|
||||
|
||||
// Testing fields
|
||||
addTxsSync bool |
||||
} |
||||
|
||||
func newServerHandler(server *LesServer, blockchain *core.BlockChain, chainDb ethdb.Database, txpool *core.TxPool, synced func() bool) *serverHandler { |
||||
handler := &serverHandler{ |
||||
server: server, |
||||
blockchain: blockchain, |
||||
chainDb: chainDb, |
||||
txpool: txpool, |
||||
closeCh: make(chan struct{}), |
||||
synced: synced, |
||||
} |
||||
return handler |
||||
} |
||||
|
||||
// start starts the server handler.
|
||||
func (h *serverHandler) start() { |
||||
h.wg.Add(1) |
||||
go h.broadcastHeaders() |
||||
} |
||||
|
||||
// stop stops the server handler.
|
||||
func (h *serverHandler) stop() { |
||||
close(h.closeCh) |
||||
h.wg.Wait() |
||||
} |
||||
|
||||
// runPeer is the p2p protocol run function for the given version.
|
||||
func (h *serverHandler) runPeer(version uint, p *p2p.Peer, rw p2p.MsgReadWriter) error { |
||||
peer := newPeer(int(version), h.server.config.NetworkId, false, p, newMeteredMsgWriter(rw, int(version))) |
||||
h.wg.Add(1) |
||||
defer h.wg.Done() |
||||
return h.handle(peer) |
||||
} |
||||
|
||||
func (h *serverHandler) handle(p *peer) error { |
||||
// Reject light clients if server is not synced.
|
||||
if !h.synced() { |
||||
return p2p.DiscRequested |
||||
} |
||||
p.Log().Debug("Light Ethereum peer connected", "name", p.Name()) |
||||
|
||||
// Execute the LES handshake
|
||||
var ( |
||||
head = h.blockchain.CurrentHeader() |
||||
hash = head.Hash() |
||||
number = head.Number.Uint64() |
||||
td = h.blockchain.GetTd(hash, number) |
||||
) |
||||
if err := p.Handshake(td, hash, number, h.blockchain.Genesis().Hash(), h.server); err != nil { |
||||
p.Log().Debug("Light Ethereum handshake failed", "err", err) |
||||
return err |
||||
} |
||||
defer p.fcClient.Disconnect() |
||||
|
||||
// Register the peer locally
|
||||
if err := h.server.peers.Register(p); err != nil { |
||||
p.Log().Error("Light Ethereum peer registration failed", "err", err) |
||||
return err |
||||
} |
||||
clientConnectionGauge.Update(int64(h.server.peers.Len())) |
||||
|
||||
// add dummy balance tracker for tests
|
||||
if p.balanceTracker == nil { |
||||
p.balanceTracker = &balanceTracker{} |
||||
p.balanceTracker.init(&mclock.System{}, 1) |
||||
} |
||||
|
||||
connectedAt := mclock.Now() |
||||
defer func() { |
||||
p.balanceTracker = nil |
||||
h.server.peers.Unregister(p.id) |
||||
clientConnectionGauge.Update(int64(h.server.peers.Len())) |
||||
connectionTimer.Update(time.Duration(mclock.Now() - connectedAt)) |
||||
}() |
||||
|
||||
// Spawn a main loop to handle all incoming messages.
|
||||
for { |
||||
select { |
||||
case err := <-p.errCh: |
||||
p.Log().Debug("Failed to send light ethereum response", "err", err) |
||||
return err |
||||
default: |
||||
} |
||||
if err := h.handleMsg(p); err != nil { |
||||
p.Log().Debug("Light Ethereum message handling failed", "err", err) |
||||
return err |
||||
} |
||||
} |
||||
} |
||||
|
||||
// handleMsg is invoked whenever an inbound message is received from a remote
|
||||
// peer. The remote connection is torn down upon returning any error.
|
||||
func (h *serverHandler) 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) |
||||
|
||||
// Discard large message which exceeds the limitation.
|
||||
if msg.Size > ProtocolMaxMsgSize { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize) |
||||
} |
||||
defer msg.Discard() |
||||
|
||||
var ( |
||||
maxCost uint64 |
||||
task *servingTask |
||||
) |
||||
p.responseCount++ |
||||
responseCount := p.responseCount |
||||
// accept returns an indicator whether the request can be served.
|
||||
// If so, deduct the max cost from the flow control buffer.
|
||||
accept := func(reqID, reqCnt, maxCnt uint64) bool { |
||||
// Short circuit if the peer is already frozen or the request is invalid.
|
||||
inSizeCost := h.server.costTracker.realCost(0, msg.Size, 0) |
||||
if p.isFrozen() || reqCnt == 0 || reqCnt > maxCnt { |
||||
p.fcClient.OneTimeCost(inSizeCost) |
||||
return false |
||||
} |
||||
// Prepaid max cost units before request been serving.
|
||||
maxCost = p.fcCosts.getMaxCost(msg.Code, reqCnt) |
||||
accepted, bufShort, priority := p.fcClient.AcceptRequest(reqID, responseCount, maxCost) |
||||
if !accepted { |
||||
p.freezeClient() |
||||
p.Log().Error("Request came too early", "remaining", common.PrettyDuration(time.Duration(bufShort*1000000/p.fcParams.MinRecharge))) |
||||
p.fcClient.OneTimeCost(inSizeCost) |
||||
return false |
||||
} |
||||
// Create a multi-stage task, estimate the time it takes for the task to
|
||||
// execute, and cache it in the request service queue.
|
||||
factor := h.server.costTracker.globalFactor() |
||||
if factor < 0.001 { |
||||
factor = 1 |
||||
p.Log().Error("Invalid global cost factor", "factor", factor) |
||||
} |
||||
maxTime := uint64(float64(maxCost) / factor) |
||||
task = h.server.servingQueue.newTask(p, maxTime, priority) |
||||
if task.start() { |
||||
return true |
||||
} |
||||
p.fcClient.RequestProcessed(reqID, responseCount, maxCost, inSizeCost) |
||||
return false |
||||
} |
||||
// sendResponse sends back the response and updates the flow control statistic.
|
||||
sendResponse := func(reqID, amount uint64, reply *reply, servingTime uint64) { |
||||
p.responseLock.Lock() |
||||
defer p.responseLock.Unlock() |
||||
|
||||
// Short circuit if the client is already frozen.
|
||||
if p.isFrozen() { |
||||
realCost := h.server.costTracker.realCost(servingTime, msg.Size, 0) |
||||
p.fcClient.RequestProcessed(reqID, responseCount, maxCost, realCost) |
||||
return |
||||
} |
||||
// Positive correction buffer value with real cost.
|
||||
var replySize uint32 |
||||
if reply != nil { |
||||
replySize = reply.size() |
||||
} |
||||
var realCost uint64 |
||||
if h.server.costTracker.testing { |
||||
realCost = maxCost // Assign a fake cost for testing purpose
|
||||
} else { |
||||
realCost = h.server.costTracker.realCost(servingTime, msg.Size, replySize) |
||||
} |
||||
bv := p.fcClient.RequestProcessed(reqID, responseCount, maxCost, realCost) |
||||
if amount != 0 { |
||||
// Feed cost tracker request serving statistic.
|
||||
h.server.costTracker.updateStats(msg.Code, amount, servingTime, realCost) |
||||
// Reduce priority "balance" for the specific peer.
|
||||
p.balanceTracker.requestCost(realCost) |
||||
} |
||||
if reply != nil { |
||||
p.queueSend(func() { |
||||
if err := reply.send(bv); err != nil { |
||||
select { |
||||
case p.errCh <- err: |
||||
default: |
||||
} |
||||
} |
||||
}) |
||||
} |
||||
} |
||||
switch msg.Code { |
||||
case GetBlockHeadersMsg: |
||||
p.Log().Trace("Received block header request") |
||||
if metrics.EnabledExpensive { |
||||
miscInHeaderPacketsMeter.Mark(1) |
||||
miscInHeaderTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Query getBlockHeadersData |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "%v: %v", msg, err) |
||||
} |
||||
query := req.Query |
||||
if accept(req.ReqID, query.Amount, MaxHeaderFetch) { |
||||
go func() { |
||||
hashMode := query.Origin.Hash != (common.Hash{}) |
||||
first := true |
||||
maxNonCanonical := uint64(100) |
||||
|
||||
// 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 { |
||||
if !first && !task.waitOrStop() { |
||||
sendResponse(req.ReqID, 0, nil, task.servingTime) |
||||
return |
||||
} |
||||
// Retrieve the next header satisfying the query
|
||||
var origin *types.Header |
||||
if hashMode { |
||||
if first { |
||||
origin = h.blockchain.GetHeaderByHash(query.Origin.Hash) |
||||
if origin != nil { |
||||
query.Origin.Number = origin.Number.Uint64() |
||||
} |
||||
} else { |
||||
origin = h.blockchain.GetHeader(query.Origin.Hash, query.Origin.Number) |
||||
} |
||||
} else { |
||||
origin = h.blockchain.GetHeaderByNumber(query.Origin.Number) |
||||
} |
||||
if origin == nil { |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
break |
||||
} |
||||
headers = append(headers, origin) |
||||
bytes += estHeaderRlpSize |
||||
|
||||
// Advance to the next header of the query
|
||||
switch { |
||||
case hashMode && query.Reverse: |
||||
// Hash based traversal towards the genesis block
|
||||
ancestor := query.Skip + 1 |
||||
if ancestor == 0 { |
||||
unknown = true |
||||
} else { |
||||
query.Origin.Hash, query.Origin.Number = h.blockchain.GetAncestor(query.Origin.Hash, query.Origin.Number, ancestor, &maxNonCanonical) |
||||
unknown = query.Origin.Hash == common.Hash{} |
||||
} |
||||
case hashMode && !query.Reverse: |
||||
// Hash based traversal towards the leaf block
|
||||
var ( |
||||
current = origin.Number.Uint64() |
||||
next = current + query.Skip + 1 |
||||
) |
||||
if next <= current { |
||||
infos, _ := json.MarshalIndent(p.Peer.Info(), "", " ") |
||||
p.Log().Warn("GetBlockHeaders skip overflow attack", "current", current, "skip", query.Skip, "next", next, "attacker", infos) |
||||
unknown = true |
||||
} else { |
||||
if header := h.blockchain.GetHeaderByNumber(next); header != nil { |
||||
nextHash := header.Hash() |
||||
expOldHash, _ := h.blockchain.GetAncestor(nextHash, next, query.Skip+1, &maxNonCanonical) |
||||
if expOldHash == query.Origin.Hash { |
||||
query.Origin.Hash, query.Origin.Number = nextHash, next |
||||
} 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 |
||||
} |
||||
first = false |
||||
} |
||||
reply := p.ReplyBlockHeaders(req.ReqID, headers) |
||||
sendResponse(req.ReqID, query.Amount, p.ReplyBlockHeaders(req.ReqID, headers), task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutHeaderPacketsMeter.Mark(1) |
||||
miscOutHeaderTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
case GetBlockBodiesMsg: |
||||
p.Log().Trace("Received block bodies request") |
||||
if metrics.EnabledExpensive { |
||||
miscInBodyPacketsMeter.Mark(1) |
||||
miscInBodyTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Hashes []common.Hash |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
var ( |
||||
bytes int |
||||
bodies []rlp.RawValue |
||||
) |
||||
reqCnt := len(req.Hashes) |
||||
if accept(req.ReqID, uint64(reqCnt), MaxBodyFetch) { |
||||
go func() { |
||||
for i, hash := range req.Hashes { |
||||
if i != 0 && !task.waitOrStop() { |
||||
sendResponse(req.ReqID, 0, nil, task.servingTime) |
||||
return |
||||
} |
||||
if bytes >= softResponseLimit { |
||||
break |
||||
} |
||||
body := h.blockchain.GetBodyRLP(hash) |
||||
if body == nil { |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
bodies = append(bodies, body) |
||||
bytes += len(body) |
||||
} |
||||
reply := p.ReplyBlockBodiesRLP(req.ReqID, bodies) |
||||
sendResponse(req.ReqID, uint64(reqCnt), reply, task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutBodyPacketsMeter.Mark(1) |
||||
miscOutBodyTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
case GetCodeMsg: |
||||
p.Log().Trace("Received code request") |
||||
if metrics.EnabledExpensive { |
||||
miscInCodePacketsMeter.Mark(1) |
||||
miscInCodeTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Reqs []CodeReq |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
var ( |
||||
bytes int |
||||
data [][]byte |
||||
) |
||||
reqCnt := len(req.Reqs) |
||||
if accept(req.ReqID, uint64(reqCnt), MaxCodeFetch) { |
||||
go func() { |
||||
for i, request := range req.Reqs { |
||||
if i != 0 && !task.waitOrStop() { |
||||
sendResponse(req.ReqID, 0, nil, task.servingTime) |
||||
return |
||||
} |
||||
// Look up the root hash belonging to the request
|
||||
header := h.blockchain.GetHeaderByHash(request.BHash) |
||||
if header == nil { |
||||
p.Log().Warn("Failed to retrieve associate header for code", "hash", request.BHash) |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
// Refuse to search stale state data in the database since looking for
|
||||
// a non-exist key is kind of expensive.
|
||||
local := h.blockchain.CurrentHeader().Number.Uint64() |
||||
if !h.server.archiveMode && header.Number.Uint64()+core.TriesInMemory <= local { |
||||
p.Log().Debug("Reject stale code request", "number", header.Number.Uint64(), "head", local) |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
triedb := h.blockchain.StateCache().TrieDB() |
||||
|
||||
account, err := h.getAccount(triedb, header.Root, common.BytesToHash(request.AccKey)) |
||||
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) |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
code, err := triedb.Node(common.BytesToHash(account.CodeHash)) |
||||
if err != nil { |
||||
p.Log().Warn("Failed to retrieve account code", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(request.AccKey), "codehash", common.BytesToHash(account.CodeHash), "err", err) |
||||
continue |
||||
} |
||||
// Accumulate the code and abort if enough data was retrieved
|
||||
data = append(data, code) |
||||
if bytes += len(code); bytes >= softResponseLimit { |
||||
break |
||||
} |
||||
} |
||||
reply := p.ReplyCode(req.ReqID, data) |
||||
sendResponse(req.ReqID, uint64(reqCnt), reply, task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutCodePacketsMeter.Mark(1) |
||||
miscOutCodeTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
case GetReceiptsMsg: |
||||
p.Log().Trace("Received receipts request") |
||||
if metrics.EnabledExpensive { |
||||
miscInReceiptPacketsMeter.Mark(1) |
||||
miscInReceiptTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Hashes []common.Hash |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
var ( |
||||
bytes int |
||||
receipts []rlp.RawValue |
||||
) |
||||
reqCnt := len(req.Hashes) |
||||
if accept(req.ReqID, uint64(reqCnt), MaxReceiptFetch) { |
||||
go func() { |
||||
for i, hash := range req.Hashes { |
||||
if i != 0 && !task.waitOrStop() { |
||||
sendResponse(req.ReqID, 0, nil, task.servingTime) |
||||
return |
||||
} |
||||
if bytes >= softResponseLimit { |
||||
break |
||||
} |
||||
// Retrieve the requested block's receipts, skipping if unknown to us
|
||||
results := h.blockchain.GetReceiptsByHash(hash) |
||||
if results == nil { |
||||
if header := h.blockchain.GetHeaderByHash(hash); header == nil || header.ReceiptHash != types.EmptyRootHash { |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
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) |
||||
} |
||||
} |
||||
reply := p.ReplyReceiptsRLP(req.ReqID, receipts) |
||||
sendResponse(req.ReqID, uint64(reqCnt), reply, task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutReceiptPacketsMeter.Mark(1) |
||||
miscOutReceiptTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
case GetProofsV2Msg: |
||||
p.Log().Trace("Received les/2 proofs request") |
||||
if metrics.EnabledExpensive { |
||||
miscInTrieProofPacketsMeter.Mark(1) |
||||
miscInTrieProofTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Reqs []ProofReq |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
// Gather state data until the fetch or network limits is reached
|
||||
var ( |
||||
lastBHash common.Hash |
||||
root common.Hash |
||||
) |
||||
reqCnt := len(req.Reqs) |
||||
if accept(req.ReqID, uint64(reqCnt), MaxProofsFetch) { |
||||
go func() { |
||||
nodes := light.NewNodeSet() |
||||
|
||||
for i, request := range req.Reqs { |
||||
if i != 0 && !task.waitOrStop() { |
||||
sendResponse(req.ReqID, 0, nil, task.servingTime) |
||||
return |
||||
} |
||||
// Look up the root hash belonging to the request
|
||||
var ( |
||||
number *uint64 |
||||
header *types.Header |
||||
trie state.Trie |
||||
) |
||||
if request.BHash != lastBHash { |
||||
root, lastBHash = common.Hash{}, request.BHash |
||||
|
||||
if header = h.blockchain.GetHeaderByHash(request.BHash); header == nil { |
||||
p.Log().Warn("Failed to retrieve header for proof", "block", *number, "hash", request.BHash) |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
// Refuse to search stale state data in the database since looking for
|
||||
// a non-exist key is kind of expensive.
|
||||
local := h.blockchain.CurrentHeader().Number.Uint64() |
||||
if !h.server.archiveMode && header.Number.Uint64()+core.TriesInMemory <= local { |
||||
p.Log().Debug("Reject stale trie request", "number", header.Number.Uint64(), "head", local) |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
root = header.Root |
||||
} |
||||
// If a header lookup failed (non existent), ignore subsequent requests for the same header
|
||||
if root == (common.Hash{}) { |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
// Open the account or storage trie for the request
|
||||
statedb := h.blockchain.StateCache() |
||||
|
||||
switch len(request.AccKey) { |
||||
case 0: |
||||
// No account key specified, open an account trie
|
||||
trie, err = statedb.OpenTrie(root) |
||||
if trie == nil || err != nil { |
||||
p.Log().Warn("Failed to open storage trie for proof", "block", header.Number, "hash", header.Hash(), "root", root, "err", err) |
||||
continue |
||||
} |
||||
default: |
||||
// Account key specified, open a storage trie
|
||||
account, err := h.getAccount(statedb.TrieDB(), root, common.BytesToHash(request.AccKey)) |
||||
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) |
||||
atomic.AddUint32(&p.invalidCount, 1) |
||||
continue |
||||
} |
||||
trie, err = statedb.OpenStorageTrie(common.BytesToHash(request.AccKey), account.Root) |
||||
if trie == nil || err != nil { |
||||
p.Log().Warn("Failed to open storage trie for proof", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(request.AccKey), "root", account.Root, "err", err) |
||||
continue |
||||
} |
||||
} |
||||
// Prove the user's request from the account or stroage trie
|
||||
if err := trie.Prove(request.Key, request.FromLevel, nodes); err != nil { |
||||
p.Log().Warn("Failed to prove state request", "block", header.Number, "hash", header.Hash(), "err", err) |
||||
continue |
||||
} |
||||
if nodes.DataSize() >= softResponseLimit { |
||||
break |
||||
} |
||||
} |
||||
reply := p.ReplyProofsV2(req.ReqID, nodes.NodeList()) |
||||
sendResponse(req.ReqID, uint64(reqCnt), reply, task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutTrieProofPacketsMeter.Mark(1) |
||||
miscOutTrieProofTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
case GetHelperTrieProofsMsg: |
||||
p.Log().Trace("Received helper trie proof request") |
||||
if metrics.EnabledExpensive { |
||||
miscInHelperTriePacketsMeter.Mark(1) |
||||
miscInHelperTrieTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Reqs []HelperTrieReq |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
// Gather state data until the fetch or network limits is reached
|
||||
var ( |
||||
auxBytes int |
||||
auxData [][]byte |
||||
) |
||||
reqCnt := len(req.Reqs) |
||||
if accept(req.ReqID, uint64(reqCnt), MaxHelperTrieProofsFetch) { |
||||
go func() { |
||||
var ( |
||||
lastIdx uint64 |
||||
lastType uint |
||||
root common.Hash |
||||
auxTrie *trie.Trie |
||||
) |
||||
nodes := light.NewNodeSet() |
||||
for i, request := range req.Reqs { |
||||
if i != 0 && !task.waitOrStop() { |
||||
sendResponse(req.ReqID, 0, nil, task.servingTime) |
||||
return |
||||
} |
||||
if auxTrie == nil || request.Type != lastType || request.TrieIdx != lastIdx { |
||||
auxTrie, lastType, lastIdx = nil, request.Type, request.TrieIdx |
||||
|
||||
var prefix string |
||||
if root, prefix = h.getHelperTrie(request.Type, request.TrieIdx); root != (common.Hash{}) { |
||||
auxTrie, _ = trie.New(root, trie.NewDatabase(rawdb.NewTable(h.chainDb, prefix))) |
||||
} |
||||
} |
||||
if request.AuxReq == auxRoot { |
||||
var data []byte |
||||
if root != (common.Hash{}) { |
||||
data = root[:] |
||||
} |
||||
auxData = append(auxData, data) |
||||
auxBytes += len(data) |
||||
} else { |
||||
if auxTrie != nil { |
||||
auxTrie.Prove(request.Key, request.FromLevel, nodes) |
||||
} |
||||
if request.AuxReq != 0 { |
||||
data := h.getAuxiliaryHeaders(request) |
||||
auxData = append(auxData, data) |
||||
auxBytes += len(data) |
||||
} |
||||
} |
||||
if nodes.DataSize()+auxBytes >= softResponseLimit { |
||||
break |
||||
} |
||||
} |
||||
reply := p.ReplyHelperTrieProofs(req.ReqID, HelperTrieResps{Proofs: nodes.NodeList(), AuxData: auxData}) |
||||
sendResponse(req.ReqID, uint64(reqCnt), reply, task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutHelperTriePacketsMeter.Mark(1) |
||||
miscOutHelperTrieTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
case SendTxV2Msg: |
||||
p.Log().Trace("Received new transactions") |
||||
if metrics.EnabledExpensive { |
||||
miscInTxsPacketsMeter.Mark(1) |
||||
miscInTxsTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Txs []*types.Transaction |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
reqCnt := len(req.Txs) |
||||
if accept(req.ReqID, uint64(reqCnt), MaxTxSend) { |
||||
go func() { |
||||
stats := make([]light.TxStatus, len(req.Txs)) |
||||
for i, tx := range req.Txs { |
||||
if i != 0 && !task.waitOrStop() { |
||||
return |
||||
} |
||||
hash := tx.Hash() |
||||
stats[i] = h.txStatus(hash) |
||||
if stats[i].Status == core.TxStatusUnknown { |
||||
addFn := h.txpool.AddRemotes |
||||
// Add txs synchronously for testing purpose
|
||||
if h.addTxsSync { |
||||
addFn = h.txpool.AddRemotesSync |
||||
} |
||||
if errs := addFn([]*types.Transaction{tx}); errs[0] != nil { |
||||
stats[i].Error = errs[0].Error() |
||||
continue |
||||
} |
||||
stats[i] = h.txStatus(hash) |
||||
} |
||||
} |
||||
reply := p.ReplyTxStatus(req.ReqID, stats) |
||||
sendResponse(req.ReqID, uint64(reqCnt), reply, task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutTxsPacketsMeter.Mark(1) |
||||
miscOutTxsTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
case GetTxStatusMsg: |
||||
p.Log().Trace("Received transaction status query request") |
||||
if metrics.EnabledExpensive { |
||||
miscInTxStatusPacketsMeter.Mark(1) |
||||
miscInTxStatusTrafficMeter.Mark(int64(msg.Size)) |
||||
} |
||||
var req struct { |
||||
ReqID uint64 |
||||
Hashes []common.Hash |
||||
} |
||||
if err := msg.Decode(&req); err != nil { |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrDecode, "msg %v: %v", msg, err) |
||||
} |
||||
reqCnt := len(req.Hashes) |
||||
if accept(req.ReqID, uint64(reqCnt), MaxTxStatus) { |
||||
go func() { |
||||
stats := make([]light.TxStatus, len(req.Hashes)) |
||||
for i, hash := range req.Hashes { |
||||
if i != 0 && !task.waitOrStop() { |
||||
sendResponse(req.ReqID, 0, nil, task.servingTime) |
||||
return |
||||
} |
||||
stats[i] = h.txStatus(hash) |
||||
} |
||||
reply := p.ReplyTxStatus(req.ReqID, stats) |
||||
sendResponse(req.ReqID, uint64(reqCnt), reply, task.done()) |
||||
if metrics.EnabledExpensive { |
||||
miscOutTxStatusPacketsMeter.Mark(1) |
||||
miscOutTxStatusTrafficMeter.Mark(int64(reply.size())) |
||||
} |
||||
}() |
||||
} |
||||
|
||||
default: |
||||
p.Log().Trace("Received invalid message", "code", msg.Code) |
||||
clientErrorMeter.Mark(1) |
||||
return errResp(ErrInvalidMsgCode, "%v", msg.Code) |
||||
} |
||||
// If the client has made too much invalid request(e.g. request a non-exist data),
|
||||
// reject them to prevent SPAM attack.
|
||||
if atomic.LoadUint32(&p.invalidCount) > maxRequestErrors { |
||||
clientErrorMeter.Mark(1) |
||||
return errTooManyInvalidRequest |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
// getAccount retrieves an account from the state based on root.
|
||||
func (h *serverHandler) getAccount(triedb *trie.Database, root, hash common.Hash) (state.Account, error) { |
||||
trie, err := trie.New(root, triedb) |
||||
if err != nil { |
||||
return state.Account{}, err |
||||
} |
||||
blob, err := trie.TryGet(hash[:]) |
||||
if err != nil { |
||||
return state.Account{}, err |
||||
} |
||||
var account state.Account |
||||
if err = rlp.DecodeBytes(blob, &account); err != nil { |
||||
return state.Account{}, err |
||||
} |
||||
return account, nil |
||||
} |
||||
|
||||
// getHelperTrie returns the post-processed trie root for the given trie ID and section index
|
||||
func (h *serverHandler) getHelperTrie(typ uint, index uint64) (common.Hash, string) { |
||||
switch typ { |
||||
case htCanonical: |
||||
sectionHead := rawdb.ReadCanonicalHash(h.chainDb, (index+1)*h.server.iConfig.ChtSize-1) |
||||
return light.GetChtRoot(h.chainDb, index, sectionHead), light.ChtTablePrefix |
||||
case htBloomBits: |
||||
sectionHead := rawdb.ReadCanonicalHash(h.chainDb, (index+1)*h.server.iConfig.BloomTrieSize-1) |
||||
return light.GetBloomTrieRoot(h.chainDb, index, sectionHead), light.BloomTrieTablePrefix |
||||
} |
||||
return common.Hash{}, "" |
||||
} |
||||
|
||||
// getAuxiliaryHeaders returns requested auxiliary headers for the CHT request.
|
||||
func (h *serverHandler) getAuxiliaryHeaders(req HelperTrieReq) []byte { |
||||
if req.Type == htCanonical && req.AuxReq == auxHeader && len(req.Key) == 8 { |
||||
blockNum := binary.BigEndian.Uint64(req.Key) |
||||
hash := rawdb.ReadCanonicalHash(h.chainDb, blockNum) |
||||
return rawdb.ReadHeaderRLP(h.chainDb, hash, blockNum) |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
// txStatus returns the status of a specified transaction.
|
||||
func (h *serverHandler) txStatus(hash common.Hash) light.TxStatus { |
||||
var stat light.TxStatus |
||||
// Looking the transaction in txpool first.
|
||||
stat.Status = h.txpool.Status([]common.Hash{hash})[0] |
||||
|
||||
// If the transaction is unknown to the pool, try looking it up locally.
|
||||
if stat.Status == core.TxStatusUnknown { |
||||
lookup := h.blockchain.GetTransactionLookup(hash) |
||||
if lookup != nil { |
||||
stat.Status = core.TxStatusIncluded |
||||
stat.Lookup = lookup |
||||
} |
||||
} |
||||
return stat |
||||
} |
||||
|
||||
// broadcastHeaders broadcasts new block information to all connected light
|
||||
// clients. According to the agreement between client and server, server should
|
||||
// only broadcast new announcement if the total difficulty is higher than the
|
||||
// last one. Besides server will add the signature if client requires.
|
||||
func (h *serverHandler) broadcastHeaders() { |
||||
defer h.wg.Done() |
||||
|
||||
headCh := make(chan core.ChainHeadEvent, 10) |
||||
headSub := h.blockchain.SubscribeChainHeadEvent(headCh) |
||||
defer headSub.Unsubscribe() |
||||
|
||||
var ( |
||||
lastHead *types.Header |
||||
lastTd = common.Big0 |
||||
) |
||||
for { |
||||
select { |
||||
case ev := <-headCh: |
||||
peers := h.server.peers.AllPeers() |
||||
if len(peers) == 0 { |
||||
continue |
||||
} |
||||
header := ev.Block.Header() |
||||
hash, number := header.Hash(), header.Number.Uint64() |
||||
td := h.blockchain.GetTd(hash, number) |
||||
if td == nil || td.Cmp(lastTd) <= 0 { |
||||
continue |
||||
} |
||||
var reorg uint64 |
||||
if lastHead != nil { |
||||
reorg = lastHead.Number.Uint64() - rawdb.FindCommonAncestor(h.chainDb, header, lastHead).Number.Uint64() |
||||
} |
||||
lastHead, lastTd = header, td |
||||
|
||||
log.Debug("Announcing block to peers", "number", number, "hash", hash, "td", td, "reorg", reorg) |
||||
var ( |
||||
signed bool |
||||
signedAnnounce announceData |
||||
) |
||||
announce := announceData{Hash: hash, Number: number, Td: td, ReorgDepth: reorg} |
||||
for _, p := range peers { |
||||
p := p |
||||
switch p.announceType { |
||||
case announceTypeSimple: |
||||
p.queueSend(func() { p.SendAnnounce(announce) }) |
||||
case announceTypeSigned: |
||||
if !signed { |
||||
signedAnnounce = announce |
||||
signedAnnounce.sign(h.server.privateKey) |
||||
signed = true |
||||
} |
||||
p.queueSend(func() { p.SendAnnounce(signedAnnounce) }) |
||||
} |
||||
} |
||||
case <-h.closeCh: |
||||
return |
||||
} |
||||
} |
||||
} |
||||
Loading…
Reference in new issue