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Diffstat (limited to 'eth/protocol.go')
-rw-r--r--eth/protocol.go383
1 files changed, 7 insertions, 376 deletions
diff --git a/eth/protocol.go b/eth/protocol.go
index 66f3cbac8..48f37b59c 100644
--- a/eth/protocol.go
+++ b/eth/protocol.go
@@ -1,17 +1,10 @@
package eth
import (
- "fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/errs"
- "github.com/ethereum/go-ethereum/eth/downloader"
- "github.com/ethereum/go-ethereum/logger"
- "github.com/ethereum/go-ethereum/logger/glog"
- "github.com/ethereum/go-ethereum/p2p"
- "github.com/ethereum/go-ethereum/rlp"
)
const (
@@ -35,6 +28,8 @@ const (
NewBlockMsg
)
+type errCode int
+
const (
ErrMsgTooLarge = iota
ErrDecode
@@ -47,6 +42,11 @@ const (
ErrSuspendedPeer
)
+func (e errCode) String() string {
+ return errorToString[int(e)]
+}
+
+// XXX change once legacy code is out
var errorToString = map[int]string{
ErrMsgTooLarge: "Message too long",
ErrDecode: "Invalid message",
@@ -59,21 +59,6 @@ var errorToString = map[int]string{
ErrSuspendedPeer: "Suspended peer",
}
-// ethProtocol represents the ethereum wire protocol
-// instance is running on each peer
-type ethProtocol struct {
- txPool txPool
- chainManager chainManager
- blockPool blockPool
- downloader *downloader.Downloader
- peer *p2p.Peer
- id string
- rw p2p.MsgReadWriter
- errors *errs.Errors
- protocolVersion int
- networkId int
-}
-
// backend is the interface the ethereum protocol backend should implement
// used as an argument to EthProtocol
type txPool interface {
@@ -87,362 +72,8 @@ type chainManager interface {
Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash)
}
-type blockPool interface {
- AddBlockHashes(next func() (common.Hash, bool), peerId string)
- AddBlock(block *types.Block, peerId string)
- AddPeer(td *big.Int, currentBlock common.Hash, peerId string, requestHashes func(common.Hash) error, requestBlocks func([]common.Hash) error, peerError func(*errs.Error)) (best bool, suspended bool)
- RemovePeer(peerId string)
-}
-
// message structs used for RLP serialization
type newBlockMsgData struct {
Block *types.Block
TD *big.Int
}
-
-type getBlockHashesMsgData struct {
- Hash common.Hash
- Amount uint64
-}
-
-type statusMsgData struct {
- ProtocolVersion uint32
- NetworkId uint32
- TD *big.Int
- CurrentBlock common.Hash
- GenesisBlock common.Hash
-}
-
-// main entrypoint, wrappers starting a server running the eth protocol
-// 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(protocolVersion, networkId int, txPool txPool, chainManager chainManager, blockPool blockPool, downloader *downloader.Downloader) p2p.Protocol {
- return p2p.Protocol{
- Name: "eth",
- Version: uint(protocolVersion),
- Length: ProtocolLength,
- Run: func(peer *p2p.Peer, rw p2p.MsgReadWriter) error {
- return runEthProtocol(protocolVersion, networkId, txPool, chainManager, blockPool, downloader, peer, rw)
- },
- }
-}
-
-// the main loop that handles incoming messages
-// note RemovePeer in the post-disconnect hook
-func runEthProtocol(protocolVersion, networkId int, txPool txPool, chainManager chainManager, blockPool blockPool, downloader *downloader.Downloader, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
- id := peer.ID()
- self := &ethProtocol{
- txPool: txPool,
- chainManager: chainManager,
- blockPool: blockPool,
- downloader: downloader,
- rw: rw,
- peer: peer,
- protocolVersion: protocolVersion,
- networkId: networkId,
- errors: &errs.Errors{
- Package: "ETH",
- Errors: errorToString,
- },
- id: fmt.Sprintf("%x", id[:8]),
- }
-
- // handshake.
- if err := self.handleStatus(); err != nil {
- return err
- }
- defer self.blockPool.RemovePeer(self.id)
-
- // propagate existing transactions. new transactions appearing
- // after this will be sent via broadcasts.
- if err := p2p.Send(rw, TxMsg, txPool.GetTransactions()); err != nil {
- return err
- }
-
- // main loop. handle incoming messages.
- for {
- if err := self.handle(); err != nil {
- return err
- }
- }
-}
-
-func (self *ethProtocol) handle() error {
- msg, err := self.rw.ReadMsg()
- if err != nil {
- return err
- }
- if msg.Size > ProtocolMaxMsgSize {
- return self.protoError(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
- }
- // make sure that the payload has been fully consumed
- defer msg.Discard()
-
- switch msg.Code {
- case GetTxMsg: // ignore
- case StatusMsg:
- return self.protoError(ErrExtraStatusMsg, "")
-
- case TxMsg:
- // TODO: rework using lazy RLP stream
- var txs []*types.Transaction
- if err := msg.Decode(&txs); err != nil {
- return self.protoError(ErrDecode, "msg %v: %v", msg, err)
- }
- for i, tx := range txs {
- if tx == nil {
- return self.protoError(ErrDecode, "transaction %d is nil", i)
- }
- jsonlogger.LogJson(&logger.EthTxReceived{
- TxHash: tx.Hash().Hex(),
- RemoteId: self.peer.ID().String(),
- })
- }
- self.txPool.AddTransactions(txs)
-
- case GetBlockHashesMsg:
- var request getBlockHashesMsgData
- if err := msg.Decode(&request); err != nil {
- return self.protoError(ErrDecode, "->msg %v: %v", msg, err)
- }
-
- if request.Amount > maxHashes {
- request.Amount = maxHashes
- }
- hashes := self.chainManager.GetBlockHashesFromHash(request.Hash, request.Amount)
- return p2p.Send(self.rw, BlockHashesMsg, hashes)
-
- case BlockHashesMsg:
- msgStream := rlp.NewStream(msg.Payload)
-
- var hashes []common.Hash
- if err := msgStream.Decode(&hashes); err != nil {
- break
- }
- self.downloader.HashCh <- hashes
-
- /*
- if _, err := msgStream.List(); err != nil {
- return err
- }
-
- var i int
- iter := func() (hash common.Hash, err error) {
- err = msgStream.Decode(&hash)
- if err == rlp.EOL {
- return common.Hash{}, err
- } else if err != nil {
- return common.Hash{}, fmt.Errorf("Fetching hashes err (%d): %v", i, err)
- }
-
- i++
- return hash, nil
- }
- self.downloader.HashCh <- iter
- //self.blockPool.AddBlockHashes(iter, self.id)
- */
-
- case GetBlocksMsg:
- msgStream := rlp.NewStream(msg.Payload)
- if _, err := msgStream.List(); err != nil {
- return err
- }
-
- var blocks []*types.Block
- var i int
- for {
- i++
- var hash common.Hash
- err := msgStream.Decode(&hash)
- if err == rlp.EOL {
- break
- } else if err != nil {
- return self.protoError(ErrDecode, "msg %v: %v", msg, err)
- }
-
- block := self.chainManager.GetBlock(hash)
- if block != nil {
- blocks = append(blocks, block)
- }
- if i == maxBlocks {
- break
- }
- }
- return p2p.Send(self.rw, BlocksMsg, blocks)
-
- case BlocksMsg:
- msgStream := rlp.NewStream(msg.Payload)
-
- var blocks []*types.Block
- if err := msgStream.Decode(&blocks); err != nil {
- glog.V(logger.Detail).Infoln("Decode error", err)
- fmt.Println("decode error", err)
- blocks = nil
- }
- self.downloader.DeliverChunk(self.id, blocks)
- /*
- msgStream := rlp.NewStream(msg.Payload)
- if _, err := msgStream.List(); err != nil {
- return err
- }
- for {
- var block types.Block
- if err := msgStream.Decode(&block); err != nil {
- if err == rlp.EOL {
- break
- } else {
- return self.protoError(ErrDecode, "msg %v: %v", msg, err)
- }
- }
- if err := block.ValidateFields(); err != nil {
- return self.protoError(ErrDecode, "block validation %v: %v", msg, err)
- }
- self.blockPool.AddBlock(&block, self.id)
- }
- */
-
- case NewBlockMsg:
- var request newBlockMsgData
- if err := msg.Decode(&request); err != nil {
- return self.protoError(ErrDecode, "%v: %v", msg, err)
- }
- if err := request.Block.ValidateFields(); err != nil {
- return self.protoError(ErrDecode, "block validation %v: %v", msg, err)
- }
- hash := request.Block.Hash()
- _, chainHead, _ := self.chainManager.Status()
-
- jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
- BlockHash: hash.Hex(),
- BlockNumber: request.Block.Number(), // this surely must be zero
- ChainHeadHash: chainHead.Hex(),
- BlockPrevHash: request.Block.ParentHash().Hex(),
- RemoteId: self.peer.ID().String(),
- })
-
- self.downloader.AddBlock(self.id, request.Block, request.TD)
- // to simplify backend interface adding a new block
- // uses AddPeer followed by AddBlock only if peer is the best peer
- // (or selected as new best peer)
- if _, suspended := self.blockPool.AddPeer(request.TD, hash, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect); !suspended {
- self.blockPool.AddBlock(request.Block, self.id)
- }
-
- default:
- return self.protoError(ErrInvalidMsgCode, "%v", msg.Code)
- }
- return nil
-}
-
-func (self *ethProtocol) handleStatus() error {
- if err := self.sendStatus(); err != nil {
- return err
- }
-
- // read and handle remote status
- msg, err := self.rw.ReadMsg()
- if err != nil {
- return err
- }
- if msg.Code != StatusMsg {
- return self.protoError(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
- }
- if msg.Size > ProtocolMaxMsgSize {
- return self.protoError(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
- }
-
- var status statusMsgData
- if err := msg.Decode(&status); err != nil {
- return self.protoError(ErrDecode, "msg %v: %v", msg, err)
- }
-
- _, _, genesisBlock := self.chainManager.Status()
-
- if status.GenesisBlock != genesisBlock {
- return self.protoError(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesisBlock)
- }
-
- if int(status.NetworkId) != self.networkId {
- return self.protoError(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, self.networkId)
- }
-
- if int(status.ProtocolVersion) != self.protocolVersion {
- return self.protoError(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, self.protocolVersion)
- }
-
- err = self.downloader.RegisterPeer(self.id, status.TD, status.CurrentBlock, self.requestBlockHashes, self.requestBlocks)
- if err != nil {
- return self.protoError(ErrSuspendedPeer, "something")
- }
- /*
- _, suspended := self.blockPool.AddPeer(status.TD, status.CurrentBlock, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect)
- if suspended {
- return self.protoError(ErrSuspendedPeer, "")
- }
- */
-
- self.peer.Debugf("Peer is [eth] capable (%d/%d). TD=%v H=%x\n", status.ProtocolVersion, status.NetworkId, status.TD, status.CurrentBlock[:4])
-
- return nil
-}
-
-func (self *ethProtocol) requestBlockHashes(from common.Hash) error {
- self.peer.Debugf("fetching hashes (%d) %x...\n", maxHashes, from[0:4])
- return p2p.Send(self.rw, GetBlockHashesMsg, getBlockHashesMsgData{from, maxHashes})
-}
-
-func (self *ethProtocol) requestBlocks(hashes []common.Hash) error {
- self.peer.Debugf("fetching %v blocks", len(hashes))
- return p2p.Send(self.rw, GetBlocksMsg, hashes)
-}
-
-/*
-func (self *ethProtocol) newRespBlockCh() BlockPack {
- self.blockRespCh = make(chan blockResp)
- return self.blockRespCh
-}
-
-func (self *ethProtocol) RequestBlocks(hashes *set.Set) <-chan []*types.Block {
- out := make(chan []*types.Block)
- go func() {
- done:
- for {
- select {
- case blockResp := <-self.newRespBlockCh():
- if len(blockResp.blocks) {
- }
- case <-time.After(5 * time.Second):
- }
- }
-
- close(out)
- }()
- return out
-}
-*/
-
-func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *errs.Error) {
- err = self.errors.New(code, format, params...)
- //err.Log(self.peer.Logger)
- err.Log(glog.V(logger.Info))
- return
-}
-
-func (self *ethProtocol) sendStatus() error {
- td, currentBlock, genesisBlock := self.chainManager.Status()
- return p2p.Send(self.rw, StatusMsg, &statusMsgData{
- ProtocolVersion: uint32(self.protocolVersion),
- NetworkId: uint32(self.networkId),
- TD: td,
- CurrentBlock: currentBlock,
- GenesisBlock: genesisBlock,
- })
-}
-
-func (self *ethProtocol) protoErrorDisconnect(err *errs.Error) {
- err.Log(glog.V(logger.Info))
- if err.Fatal() {
- self.peer.Disconnect(p2p.DiscSubprotocolError)
- }
-
-}
generated by cgit (git 2.34.1) at 2024-11-14 23:14:55 +0800