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
31a9fdced8
commit
e74f9f27db
136
eth/protocol.go
136
eth/protocol.go
@ -7,18 +7,16 @@ import (
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethutil"
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ethlogger "github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/rlp"
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)
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var logger = ethlogger.NewLogger("SERV")
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// ethProtocol represents the ethereum wire protocol
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// instance is running on each peer
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type ethProtocol struct {
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eth backend
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td *big.Int
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peer *p2p.Peer
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id string
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rw p2p.MsgReadWriter
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}
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@ -26,28 +24,21 @@ type ethProtocol struct {
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// used as an argument to EthProtocol
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type backend interface {
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GetTransactions() (txs []*types.Transaction)
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AddTransactions(txs []*types.Transaction)
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AddTransactions([]*types.Transaction)
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GetBlockHashes(hash []byte, amount uint32) (hashes [][]byte)
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AddHash(hash []byte, peer *p2p.Peer) (more bool)
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AddBlockHashes(next func() ([]byte, bool), peerId string)
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GetBlock(hash []byte) (block *types.Block)
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AddBlock(td *big.Int, block *types.Block, peer *p2p.Peer) (fetchHashes bool, err error)
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AddPeer(td *big.Int, currentBlock []byte, peer *p2p.Peer) (fetchHashes bool)
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AddBlock(block *types.Block, peerId string) (err error)
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AddPeer(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, invalidBlock func(error)) (best bool)
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RemovePeer(peerId string)
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Status() (td *big.Int, currentBlock []byte, genesisBlock []byte)
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}
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const (
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ProtocolVersion = 43
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// 0x00 // PoC-1
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// 0x01 // PoC-2
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// 0x07 // PoC-3
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// 0x09 // PoC-4
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// 0x17 // PoC-5
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// 0x1c // PoC-6
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ProtocolVersion = 43
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NetworkId = 0
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ProtocolLength = uint64(8)
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ProtocolMaxMsgSize = 10 * 1024 * 1024
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blockHashesBatchSize = 256
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)
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// eth protocol message codes
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@ -74,7 +65,8 @@ type getBlockHashesMsgData struct {
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}
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// main entrypoint, wrappers starting a server running the eth protocol
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// use this constructor to attach the protocol (class) to server caps
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// use this constructor to attach the protocol ("class") to server caps
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// the Dev p2p layer then runs the protocol instance on each peer
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func EthProtocol(eth backend) *p2p.Protocol {
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return &p2p.Protocol{
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Name: "eth",
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@ -86,11 +78,14 @@ func EthProtocol(eth backend) *p2p.Protocol {
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}
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}
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// the main loop that handles incoming messages
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// note RemovePeer in the post-disconnect hook
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func runEthProtocol(eth backend, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
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self := ðProtocol{
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eth: eth,
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rw: rw,
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peer: peer,
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id: (string)(peer.Identity().Pubkey()),
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}
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err = self.handleStatus()
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if err == nil {
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@ -98,6 +93,7 @@ func runEthProtocol(eth backend, peer *p2p.Peer, rw p2p.MsgReadWriter) (err erro
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for {
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err = self.handle()
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if err != nil {
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self.eth.RemovePeer(self.id)
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break
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}
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}
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@ -132,6 +128,7 @@ func (self *ethProtocol) handle() error {
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return self.rw.EncodeMsg(TxMsg, txsInterface...)
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case TxMsg:
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// TODO: rework using lazy RLP stream
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var txs []*types.Transaction
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if err := msg.Decode(&txs); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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@ -148,29 +145,26 @@ func (self *ethProtocol) handle() error {
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case BlockHashesMsg:
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// TODO: redo using lazy decode , this way very inefficient on known chains
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// s := rlp.NewListStream(msg.Payload, uint64(msg.Size))
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var blockHashes [][]byte
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if err := msg.Decode(&blockHashes); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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fetchMore := true
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for _, hash := range blockHashes {
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fetchMore = self.eth.AddHash(hash, self.peer)
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if !fetchMore {
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break
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msgStream := rlp.NewListStream(msg.Payload, uint64(msg.Size))
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var err error
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iter := func() (hash []byte, ok bool) {
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hash, err = msgStream.Bytes()
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if err == nil {
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ok = true
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}
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return
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}
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if fetchMore {
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return self.FetchHashes(blockHashes[len(blockHashes)-1])
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self.eth.AddBlockHashes(iter, self.id)
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if err != nil && err != rlp.EOL {
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return ProtocolError(ErrDecode, "%v", err)
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}
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case GetBlocksMsg:
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// Limit to max 300 blocks
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var blockHashes [][]byte
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if err := msg.Decode(&blockHashes); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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max := int(math.Min(float64(len(blockHashes)), 300.0))
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max := int(math.Min(float64(len(blockHashes)), blockHashesBatchSize))
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var blocks []interface{}
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for i, hash := range blockHashes {
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if i >= max {
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@ -184,20 +178,19 @@ func (self *ethProtocol) handle() error {
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return self.rw.EncodeMsg(BlocksMsg, blocks...)
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case BlocksMsg:
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var blocks []*types.Block
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if err := msg.Decode(&blocks); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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for _, block := range blocks {
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fetchHashes, err := self.eth.AddBlock(nil, block, self.peer)
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if err != nil {
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return ProtocolError(ErrInvalidBlock, "%v", err)
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}
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if fetchHashes {
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if err := self.FetchHashes(block.Hash()); err != nil {
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return err
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msgStream := rlp.NewListStream(msg.Payload, uint64(msg.Size))
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for {
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var block *types.Block
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if err := msgStream.Decode(&block); err != nil {
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if err == rlp.EOL {
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break
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} else {
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return ProtocolError(ErrDecode, "%v", err)
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}
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}
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if err := self.eth.AddBlock(block, self.id); err != nil {
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return ProtocolError(ErrInvalidBlock, "%v", err)
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}
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}
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case NewBlockMsg:
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@ -205,13 +198,24 @@ func (self *ethProtocol) handle() error {
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if err := msg.Decode(&request); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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var fetchHashes bool
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// this should reset td and offer blockpool as candidate new peer?
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if fetchHashes, err = self.eth.AddBlock(request.TD, request.Block, self.peer); err != nil {
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return ProtocolError(ErrInvalidBlock, "%v", err)
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}
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if fetchHashes {
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return self.FetchHashes(request.Block.Hash())
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hash := request.Block.Hash()
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// to simplify backend interface adding a new block
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// uses AddPeer followed by AddHashes, AddBlock only if peer is the best peer
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// (or selected as new best peer)
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if self.eth.AddPeer(request.TD, hash, self.id, self.requestBlockHashes, self.requestBlocks, self.invalidBlock) {
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called := true
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iter := func() (hash []byte, ok bool) {
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if called {
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called = false
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return hash, true
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} else {
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return
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}
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}
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self.eth.AddBlockHashes(iter, self.id)
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if err := self.eth.AddBlock(request.Block, self.id); err != nil {
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return ProtocolError(ErrInvalidBlock, "%v", err)
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}
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}
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default:
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@ -279,16 +283,34 @@ func (self *ethProtocol) handleStatus() error {
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return ProtocolError(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, ProtocolVersion)
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}
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logger.Infof("Peer is [eth] capable (%d/%d). TD = %v ~ %x", status.ProtocolVersion, status.NetworkId, status.CurrentBlock)
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self.peer.Infof("Peer is [eth] capable (%d/%d). TD = %v ~ %x", status.ProtocolVersion, status.NetworkId, status.CurrentBlock)
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if self.eth.AddPeer(status.TD, status.CurrentBlock, self.peer) {
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return self.FetchHashes(status.CurrentBlock)
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}
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self.eth.AddPeer(status.TD, status.CurrentBlock, self.id, self.requestBlockHashes, self.requestBlocks, self.invalidBlock)
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return nil
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}
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func (self *ethProtocol) FetchHashes(from []byte) error {
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logger.Debugf("Fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
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func (self *ethProtocol) requestBlockHashes(from []byte) error {
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self.peer.Debugf("fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
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return self.rw.EncodeMsg(GetBlockHashesMsg, from, blockHashesBatchSize)
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}
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func (self *ethProtocol) requestBlocks(hashes [][]byte) error {
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self.peer.Debugf("fetching %v blocks", len(hashes))
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return self.rw.EncodeMsg(GetBlocksMsg, ethutil.ByteSliceToInterface(hashes))
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}
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func (self *ethProtocol) invalidBlock(err error) {
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ProtocolError(ErrInvalidBlock, "%v", err)
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self.peer.Disconnect(p2p.DiscSubprotocolError)
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}
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func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *protocolError) {
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err = ProtocolError(code, format, params...)
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if err.Fatal() {
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self.peer.Errorln(err)
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} else {
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self.peer.Debugln(err)
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}
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return
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}
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@ -6,6 +6,7 @@ import (
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"testing"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/p2p"
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)
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@ -55,10 +56,11 @@ type TestBackend struct {
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getTransactions func() []*types.Transaction
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addTransactions func(txs []*types.Transaction)
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getBlockHashes func(hash []byte, amount uint32) (hashes [][]byte)
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addHash func(hash []byte, peer *p2p.Peer) (more bool)
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addBlockHashes func(next func() ([]byte, bool), peerId string)
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getBlock func(hash []byte) *types.Block
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addBlock func(td *big.Int, block *types.Block, peer *p2p.Peer) (fetchHashes bool, err error)
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addPeer func(td *big.Int, currentBlock []byte, peer *p2p.Peer) (fetchHashes bool)
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addBlock func(block *types.Block, peerId string) (err error)
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addPeer func(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, invalidBlock func(error)) (best bool)
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removePeer func(peerId string)
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status func() (td *big.Int, currentBlock []byte, genesisBlock []byte)
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}
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@ -82,12 +84,12 @@ func (self *TestBackend) GetBlockHashes(hash []byte, amount uint32) (hashes [][]
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return
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}
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func (self *TestBackend) AddHash(hash []byte, peer *p2p.Peer) (more bool) {
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if self.addHash != nil {
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more = self.addHash(hash, peer)
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func (self *TestBackend) AddBlockHashes(next func() ([]byte, bool), peerId string) {
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if self.addBlockHashes != nil {
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self.addBlockHashes(next, peerId)
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}
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return
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}
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func (self *TestBackend) GetBlock(hash []byte) (block *types.Block) {
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if self.getBlock != nil {
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block = self.getBlock(hash)
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@ -95,20 +97,26 @@ func (self *TestBackend) GetBlock(hash []byte) (block *types.Block) {
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return
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}
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func (self *TestBackend) AddBlock(td *big.Int, block *types.Block, peer *p2p.Peer) (fetchHashes bool, err error) {
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func (self *TestBackend) AddBlock(block *types.Block, peerId string) (err error) {
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if self.addBlock != nil {
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fetchHashes, err = self.addBlock(td, block, peer)
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err = self.addBlock(block, peerId)
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}
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return
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}
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func (self *TestBackend) AddPeer(td *big.Int, currentBlock []byte, peer *p2p.Peer) (fetchHashes bool) {
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func (self *TestBackend) AddPeer(td *big.Int, currentBlock []byte, peerId string, requestBlockHashes func([]byte) error, requestBlocks func([][]byte) error, invalidBlock func(error)) (best bool) {
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if self.addPeer != nil {
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fetchHashes = self.addPeer(td, currentBlock, peer)
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best = self.addPeer(td, currentBlock, peerId, requestBlockHashes, requestBlocks, invalidBlock)
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}
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return
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}
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func (self *TestBackend) RemovePeer(peerId string) {
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if self.removePeer != nil {
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self.removePeer(peerId)
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}
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}
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func (self *TestBackend) Status() (td *big.Int, currentBlock []byte, genesisBlock []byte) {
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if self.status != nil {
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td, currentBlock, genesisBlock = self.status()
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@ -116,13 +124,35 @@ func (self *TestBackend) Status() (td *big.Int, currentBlock []byte, genesisBloc
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return
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}
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func TestEth(t *testing.T) {
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// TODO: refactor this into p2p/client_identity
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type peerId struct {
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pubkey []byte
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}
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func (self *peerId) String() string {
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return "test peer"
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}
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func (self *peerId) Pubkey() (pubkey []byte) {
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pubkey = self.pubkey
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if len(pubkey) == 0 {
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pubkey = crypto.GenerateNewKeyPair().PublicKey
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self.pubkey = pubkey
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}
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return
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}
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func testPeer() *p2p.Peer {
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return p2p.NewPeer(&peerId{}, []p2p.Cap{})
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}
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func TestErrNoStatusMsg(t *testing.T) {
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quit := make(chan bool)
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rw := &testMsgReadWriter{make(chan p2p.Msg, 10), make(chan p2p.Msg, 10)}
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testBackend := &TestBackend{}
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var err error
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go func() {
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err = runEthProtocol(testBackend, nil, rw)
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err = runEthProtocol(testBackend, testPeer(), rw)
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close(quit)
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}()
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statusMsg := p2p.NewMsg(4)
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