forked from cerc-io/plugeth
eth protocol changes
- changed backend interface - using callbacks for blockPool - use rlp stream for lazy decoding - use peer as logger - add id (peer pubkey) to ethProtocol fields - add testPeer to protocol test (temporary)
This commit is contained in:
zelig
parent
eb5cb04aa9
commit
d957dd2c9f
136
eth/protocol.go
136
eth/protocol.go
@ -7,18 +7,16 @@ import (
|
||||
|
||||
"github.com/ethereum/go-ethereum/core/types"
|
||||
"github.com/ethereum/go-ethereum/ethutil"
|
||||
ethlogger "github.com/ethereum/go-ethereum/logger"
|
||||
"github.com/ethereum/go-ethereum/p2p"
|
||||
"github.com/ethereum/go-ethereum/rlp"
|
||||
)
|
||||
|
||||
var logger = ethlogger.NewLogger("SERV")
|
||||
|
||||
// ethProtocol represents the ethereum wire protocol
|
||||
// instance is running on each peer
|
||||
type ethProtocol struct {
|
||||
eth backend
|
||||
td *big.Int
|
||||
peer *p2p.Peer
|
||||
id string
|
||||
rw p2p.MsgReadWriter
|
||||
}
|
||||
|
||||
@ -26,28 +24,21 @@ type ethProtocol struct {
|
||||
// used as an argument to EthProtocol
|
||||
type backend interface {
|
||||
GetTransactions() (txs []*types.Transaction)
|
||||
AddTransactions(txs []*types.Transaction)
|
||||
AddTransactions([]*types.Transaction)
|
||||
GetBlockHashes(hash []byte, amount uint32) (hashes [][]byte)
|
||||
AddHash(hash []byte, peer *p2p.Peer) (more bool)
|
||||
AddBlockHashes(next func() ([]byte, bool), peerId string)
|
||||
GetBlock(hash []byte) (block *types.Block)
|
||||
AddBlock(td *big.Int, block *types.Block, peer *p2p.Peer) (fetchHashes bool, err error)
|
||||
AddPeer(td *big.Int, currentBlock []byte, peer *p2p.Peer) (fetchHashes bool)
|
||||
AddBlock(block *types.Block, peerId string) (err error)
|
||||
AddPeer(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, invalidBlock func(error)) (best bool)
|
||||
RemovePeer(peerId string)
|
||||
Status() (td *big.Int, currentBlock []byte, genesisBlock []byte)
|
||||
}
|
||||
|
||||
const (
|
||||
ProtocolVersion = 43
|
||||
// 0x00 // PoC-1
|
||||
// 0x01 // PoC-2
|
||||
// 0x07 // PoC-3
|
||||
// 0x09 // PoC-4
|
||||
// 0x17 // PoC-5
|
||||
// 0x1c // PoC-6
|
||||
ProtocolVersion = 43
|
||||
NetworkId = 0
|
||||
ProtocolLength = uint64(8)
|
||||
ProtocolMaxMsgSize = 10 * 1024 * 1024
|
||||
|
||||
blockHashesBatchSize = 256
|
||||
)
|
||||
|
||||
// eth protocol message codes
|
||||
@ -74,7 +65,8 @@ type getBlockHashesMsgData struct {
|
||||
}
|
||||
|
||||
// main entrypoint, wrappers starting a server running the eth protocol
|
||||
// use this constructor to attach the protocol (class) to server caps
|
||||
// use this constructor to attach the protocol ("class") to server caps
|
||||
// the Dev p2p layer then runs the protocol instance on each peer
|
||||
func EthProtocol(eth backend) *p2p.Protocol {
|
||||
return &p2p.Protocol{
|
||||
Name: "eth",
|
||||
@ -86,11 +78,14 @@ func EthProtocol(eth backend) *p2p.Protocol {
|
||||
}
|
||||
}
|
||||
|
||||
// the main loop that handles incoming messages
|
||||
// note RemovePeer in the post-disconnect hook
|
||||
func runEthProtocol(eth backend, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
|
||||
self := ðProtocol{
|
||||
eth: eth,
|
||||
rw: rw,
|
||||
peer: peer,
|
||||
id: (string)(peer.Identity().Pubkey()),
|
||||
}
|
||||
err = self.handleStatus()
|
||||
if err == nil {
|
||||
@ -98,6 +93,7 @@ func runEthProtocol(eth backend, peer *p2p.Peer, rw p2p.MsgReadWriter) (err erro
|
||||
for {
|
||||
err = self.handle()
|
||||
if err != nil {
|
||||
self.eth.RemovePeer(self.id)
|
||||
break
|
||||
}
|
||||
}
|
||||
@ -132,6 +128,7 @@ func (self *ethProtocol) handle() error {
|
||||
return self.rw.EncodeMsg(TxMsg, txsInterface...)
|
||||
|
||||
case TxMsg:
|
||||
// TODO: rework using lazy RLP stream
|
||||
var txs []*types.Transaction
|
||||
if err := msg.Decode(&txs); err != nil {
|
||||
return ProtocolError(ErrDecode, "%v", err)
|
||||
@ -148,29 +145,26 @@ func (self *ethProtocol) handle() error {
|
||||
|
||||
case BlockHashesMsg:
|
||||
// TODO: redo using lazy decode , this way very inefficient on known chains
|
||||
// s := rlp.NewListStream(msg.Payload, uint64(msg.Size))
|
||||
var blockHashes [][]byte
|
||||
if err := msg.Decode(&blockHashes); err != nil {
|
||||
return ProtocolError(ErrDecode, "%v", err)
|
||||
}
|
||||
fetchMore := true
|
||||
for _, hash := range blockHashes {
|
||||
fetchMore = self.eth.AddHash(hash, self.peer)
|
||||
if !fetchMore {
|
||||
break
|
||||
msgStream := rlp.NewListStream(msg.Payload, uint64(msg.Size))
|
||||
var err error
|
||||
iter := func() (hash []byte, ok bool) {
|
||||
hash, err = msgStream.Bytes()
|
||||
if err == nil {
|
||||
ok = true
|
||||
}
|
||||
return
|
||||
}
|
||||
if fetchMore {
|
||||
return self.FetchHashes(blockHashes[len(blockHashes)-1])
|
||||
self.eth.AddBlockHashes(iter, self.id)
|
||||
if err != nil && err != rlp.EOL {
|
||||
return ProtocolError(ErrDecode, "%v", err)
|
||||
}
|
||||
|
||||
case GetBlocksMsg:
|
||||
// Limit to max 300 blocks
|
||||
var blockHashes [][]byte
|
||||
if err := msg.Decode(&blockHashes); err != nil {
|
||||
return ProtocolError(ErrDecode, "%v", err)
|
||||
}
|
||||
max := int(math.Min(float64(len(blockHashes)), 300.0))
|
||||
max := int(math.Min(float64(len(blockHashes)), blockHashesBatchSize))
|
||||
var blocks []interface{}
|
||||
for i, hash := range blockHashes {
|
||||
if i >= max {
|
||||
@ -184,20 +178,19 @@ func (self *ethProtocol) handle() error {
|
||||
return self.rw.EncodeMsg(BlocksMsg, blocks...)
|
||||
|
||||
case BlocksMsg:
|
||||
var blocks []*types.Block
|
||||
if err := msg.Decode(&blocks); err != nil {
|
||||
return ProtocolError(ErrDecode, "%v", err)
|
||||
}
|
||||
for _, block := range blocks {
|
||||
fetchHashes, err := self.eth.AddBlock(nil, block, self.peer)
|
||||
if err != nil {
|
||||
return ProtocolError(ErrInvalidBlock, "%v", err)
|
||||
}
|
||||
if fetchHashes {
|
||||
if err := self.FetchHashes(block.Hash()); err != nil {
|
||||
return err
|
||||
msgStream := rlp.NewListStream(msg.Payload, uint64(msg.Size))
|
||||
for {
|
||||
var block *types.Block
|
||||
if err := msgStream.Decode(&block); err != nil {
|
||||
if err == rlp.EOL {
|
||||
break
|
||||
} else {
|
||||
return ProtocolError(ErrDecode, "%v", err)
|
||||
}
|
||||
}
|
||||
if err := self.eth.AddBlock(block, self.id); err != nil {
|
||||
return ProtocolError(ErrInvalidBlock, "%v", err)
|
||||
}
|
||||
}
|
||||
|
||||
case NewBlockMsg:
|
||||
@ -205,13 +198,24 @@ func (self *ethProtocol) handle() error {
|
||||
if err := msg.Decode(&request); err != nil {
|
||||
return ProtocolError(ErrDecode, "%v", err)
|
||||
}
|
||||
var fetchHashes bool
|
||||
// this should reset td and offer blockpool as candidate new peer?
|
||||
if fetchHashes, err = self.eth.AddBlock(request.TD, request.Block, self.peer); err != nil {
|
||||
return ProtocolError(ErrInvalidBlock, "%v", err)
|
||||
}
|
||||
if fetchHashes {
|
||||
return self.FetchHashes(request.Block.Hash())
|
||||
hash := request.Block.Hash()
|
||||
// to simplify backend interface adding a new block
|
||||
// uses AddPeer followed by AddHashes, AddBlock only if peer is the best peer
|
||||
// (or selected as new best peer)
|
||||
if self.eth.AddPeer(request.TD, hash, self.id, self.requestBlockHashes, self.requestBlocks, self.invalidBlock) {
|
||||
called := true
|
||||
iter := func() (hash []byte, ok bool) {
|
||||
if called {
|
||||
called = false
|
||||
return hash, true
|
||||
} else {
|
||||
return
|
||||
}
|
||||
}
|
||||
self.eth.AddBlockHashes(iter, self.id)
|
||||
if err := self.eth.AddBlock(request.Block, self.id); err != nil {
|
||||
return ProtocolError(ErrInvalidBlock, "%v", err)
|
||||
}
|
||||
}
|
||||
|
||||
default:
|
||||
@ -279,16 +283,34 @@ func (self *ethProtocol) handleStatus() error {
|
||||
return ProtocolError(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, ProtocolVersion)
|
||||
}
|
||||
|
||||
logger.Infof("Peer is [eth] capable (%d/%d). TD = %v ~ %x", status.ProtocolVersion, status.NetworkId, status.CurrentBlock)
|
||||
self.peer.Infof("Peer is [eth] capable (%d/%d). TD = %v ~ %x", status.ProtocolVersion, status.NetworkId, status.CurrentBlock)
|
||||
|
||||
if self.eth.AddPeer(status.TD, status.CurrentBlock, self.peer) {
|
||||
return self.FetchHashes(status.CurrentBlock)
|
||||
}
|
||||
self.eth.AddPeer(status.TD, status.CurrentBlock, self.id, self.requestBlockHashes, self.requestBlocks, self.invalidBlock)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self *ethProtocol) FetchHashes(from []byte) error {
|
||||
logger.Debugf("Fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
|
||||
func (self *ethProtocol) requestBlockHashes(from []byte) error {
|
||||
self.peer.Debugf("fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
|
||||
return self.rw.EncodeMsg(GetBlockHashesMsg, from, blockHashesBatchSize)
|
||||
}
|
||||
|
||||
func (self *ethProtocol) requestBlocks(hashes [][]byte) error {
|
||||
self.peer.Debugf("fetching %v blocks", len(hashes))
|
||||
return self.rw.EncodeMsg(GetBlocksMsg, ethutil.ByteSliceToInterface(hashes))
|
||||
}
|
||||
|
||||
func (self *ethProtocol) invalidBlock(err error) {
|
||||
ProtocolError(ErrInvalidBlock, "%v", err)
|
||||
self.peer.Disconnect(p2p.DiscSubprotocolError)
|
||||
}
|
||||
|
||||
func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *protocolError) {
|
||||
err = ProtocolError(code, format, params...)
|
||||
if err.Fatal() {
|
||||
self.peer.Errorln(err)
|
||||
} else {
|
||||
self.peer.Debugln(err)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
@ -6,6 +6,7 @@ import (
|
||||
"testing"
|
||||
|
||||
"github.com/ethereum/go-ethereum/core/types"
|
||||
"github.com/ethereum/go-ethereum/crypto"
|
||||
"github.com/ethereum/go-ethereum/p2p"
|
||||
)
|
||||
|
||||
@ -55,10 +56,11 @@ type TestBackend struct {
|
||||
getTransactions func() []*types.Transaction
|
||||
addTransactions func(txs []*types.Transaction)
|
||||
getBlockHashes func(hash []byte, amount uint32) (hashes [][]byte)
|
||||
addHash func(hash []byte, peer *p2p.Peer) (more bool)
|
||||
addBlockHashes func(next func() ([]byte, bool), peerId string)
|
||||
getBlock func(hash []byte) *types.Block
|
||||
addBlock func(td *big.Int, block *types.Block, peer *p2p.Peer) (fetchHashes bool, err error)
|
||||
addPeer func(td *big.Int, currentBlock []byte, peer *p2p.Peer) (fetchHashes bool)
|
||||
addBlock func(block *types.Block, peerId string) (err error)
|
||||
addPeer func(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, invalidBlock func(error)) (best bool)
|
||||
removePeer func(peerId string)
|
||||
status func() (td *big.Int, currentBlock []byte, genesisBlock []byte)
|
||||
}
|
||||
|
||||
@ -82,12 +84,12 @@ func (self *TestBackend) GetBlockHashes(hash []byte, amount uint32) (hashes [][]
|
||||
return
|
||||
}
|
||||
|
||||
func (self *TestBackend) AddHash(hash []byte, peer *p2p.Peer) (more bool) {
|
||||
if self.addHash != nil {
|
||||
more = self.addHash(hash, peer)
|
||||
func (self *TestBackend) AddBlockHashes(next func() ([]byte, bool), peerId string) {
|
||||
if self.addBlockHashes != nil {
|
||||
self.addBlockHashes(next, peerId)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (self *TestBackend) GetBlock(hash []byte) (block *types.Block) {
|
||||
if self.getBlock != nil {
|
||||
block = self.getBlock(hash)
|
||||
@ -95,20 +97,26 @@ func (self *TestBackend) GetBlock(hash []byte) (block *types.Block) {
|
||||
return
|
||||
}
|
||||
|
||||
func (self *TestBackend) AddBlock(td *big.Int, block *types.Block, peer *p2p.Peer) (fetchHashes bool, err error) {
|
||||
func (self *TestBackend) AddBlock(block *types.Block, peerId string) (err error) {
|
||||
if self.addBlock != nil {
|
||||
fetchHashes, err = self.addBlock(td, block, peer)
|
||||
err = self.addBlock(block, peerId)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (self *TestBackend) AddPeer(td *big.Int, currentBlock []byte, peer *p2p.Peer) (fetchHashes bool) {
|
||||
func (self *TestBackend) AddPeer(td *big.Int, currentBlock []byte, peerId string, requestBlockHashes func([]byte) error, requestBlocks func([][]byte) error, invalidBlock func(error)) (best bool) {
|
||||
if self.addPeer != nil {
|
||||
fetchHashes = self.addPeer(td, currentBlock, peer)
|
||||
best = self.addPeer(td, currentBlock, peerId, requestBlockHashes, requestBlocks, invalidBlock)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (self *TestBackend) RemovePeer(peerId string) {
|
||||
if self.removePeer != nil {
|
||||
self.removePeer(peerId)
|
||||
}
|
||||
}
|
||||
|
||||
func (self *TestBackend) Status() (td *big.Int, currentBlock []byte, genesisBlock []byte) {
|
||||
if self.status != nil {
|
||||
td, currentBlock, genesisBlock = self.status()
|
||||
@ -116,13 +124,35 @@ func (self *TestBackend) Status() (td *big.Int, currentBlock []byte, genesisBloc
|
||||
return
|
||||
}
|
||||
|
||||
func TestEth(t *testing.T) {
|
||||
// TODO: refactor this into p2p/client_identity
|
||||
type peerId struct {
|
||||
pubkey []byte
|
||||
}
|
||||
|
||||
func (self *peerId) String() string {
|
||||
return "test peer"
|
||||
}
|
||||
|
||||
func (self *peerId) Pubkey() (pubkey []byte) {
|
||||
pubkey = self.pubkey
|
||||
if len(pubkey) == 0 {
|
||||
pubkey = crypto.GenerateNewKeyPair().PublicKey
|
||||
self.pubkey = pubkey
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func testPeer() *p2p.Peer {
|
||||
return p2p.NewPeer(&peerId{}, []p2p.Cap{})
|
||||
}
|
||||
|
||||
func TestErrNoStatusMsg(t *testing.T) {
|
||||
quit := make(chan bool)
|
||||
rw := &testMsgReadWriter{make(chan p2p.Msg, 10), make(chan p2p.Msg, 10)}
|
||||
testBackend := &TestBackend{}
|
||||
var err error
|
||||
go func() {
|
||||
err = runEthProtocol(testBackend, nil, rw)
|
||||
err = runEthProtocol(testBackend, testPeer(), rw)
|
||||
close(quit)
|
||||
}()
|
||||
statusMsg := p2p.NewMsg(4)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user