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Diffstat (limited to 'eth/handler.go')
-rw-r--r--eth/handler.go227
1 files changed, 96 insertions, 131 deletions
diff --git a/eth/handler.go b/eth/handler.go
index ec4f2d53a..a5986b779 100644
--- a/eth/handler.go
+++ b/eth/handler.go
@@ -3,14 +3,15 @@ package eth
import (
"fmt"
"math"
- "math/big"
"sync"
"time"
+ "github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/downloader"
+ "github.com/ethereum/go-ethereum/eth/fetcher"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
@@ -45,6 +46,7 @@ type ProtocolManager struct {
txpool txPool
chainman *core.ChainManager
downloader *downloader.Downloader
+ fetcher *fetcher.Fetcher
peers *peerSet
SubProtocol p2p.Protocol
@@ -54,11 +56,9 @@ type ProtocolManager struct {
minedBlockSub event.Subscription
// channels for fetcher, syncer, txsyncLoop
- newPeerCh chan *peer
- newHashCh chan []*blockAnnounce
- newBlockCh chan chan []*types.Block
- txsyncCh chan *txsync
- quitSync chan struct{}
+ newPeerCh chan *peer
+ txsyncCh chan *txsync
+ quitSync chan struct{}
// wait group is used for graceful shutdowns during downloading
// and processing
@@ -68,31 +68,37 @@ type ProtocolManager struct {
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
// with the ethereum network.
-func NewProtocolManager(protocolVersion, networkId int, mux *event.TypeMux, txpool txPool, chainman *core.ChainManager) *ProtocolManager {
+func NewProtocolManager(protocolVersion, networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, chainman *core.ChainManager) *ProtocolManager {
+ // Create the protocol manager and initialize peer handlers
manager := &ProtocolManager{
- eventMux: mux,
- txpool: txpool,
- chainman: chainman,
- peers: newPeerSet(),
- newPeerCh: make(chan *peer, 1),
- newHashCh: make(chan []*blockAnnounce, 1),
- newBlockCh: make(chan chan []*types.Block),
- txsyncCh: make(chan *txsync),
- quitSync: make(chan struct{}),
+ eventMux: mux,
+ txpool: txpool,
+ chainman: chainman,
+ peers: newPeerSet(),
+ newPeerCh: make(chan *peer, 1),
+ txsyncCh: make(chan *txsync),
+ quitSync: make(chan struct{}),
}
- manager.downloader = downloader.New(manager.eventMux, manager.chainman.HasBlock, manager.chainman.GetBlock, manager.chainman.InsertChain, manager.removePeer)
manager.SubProtocol = p2p.Protocol{
Name: "eth",
Version: uint(protocolVersion),
Length: ProtocolLength,
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
peer := manager.newPeer(protocolVersion, networkId, p, rw)
-
manager.newPeerCh <- peer
-
return manager.handle(peer)
},
}
+ // Construct the different synchronisation mechanisms
+ manager.downloader = downloader.New(manager.eventMux, manager.chainman.HasBlock, manager.chainman.GetBlock, manager.chainman.InsertChain, manager.removePeer)
+
+ validator := func(block *types.Block, parent *types.Block) error {
+ return core.ValidateHeader(pow, block.Header(), parent.Header(), true)
+ }
+ heighter := func() uint64 {
+ return manager.chainman.CurrentBlock().NumberU64()
+ }
+ manager.fetcher = fetcher.New(manager.chainman.GetBlock, validator, manager.BroadcastBlock, heighter, manager.chainman.InsertChain, manager.removePeer)
return manager
}
@@ -126,7 +132,6 @@ func (pm *ProtocolManager) Start() {
// start sync handlers
go pm.syncer()
- go pm.fetcher()
go pm.txsyncLoop()
}
@@ -185,7 +190,7 @@ func (pm *ProtocolManager) handle(p *peer) error {
return nil
}
-func (self *ProtocolManager) handleMsg(p *peer) error {
+func (pm *ProtocolManager) handleMsg(p *peer) error {
msg, err := p.rw.ReadMsg()
if err != nil {
return err
@@ -215,7 +220,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
RemoteId: p.ID().String(),
})
}
- self.txpool.AddTransactions(txs)
+ pm.txpool.AddTransactions(txs)
case GetBlockHashesMsg:
var request getBlockHashesMsgData
@@ -227,7 +232,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
request.Amount = uint64(downloader.MaxHashFetch)
}
- hashes := self.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
+ hashes := pm.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
if glog.V(logger.Debug) {
if len(hashes) == 0 {
@@ -245,40 +250,50 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
if err := msgStream.Decode(&hashes); err != nil {
break
}
- err := self.downloader.DeliverHashes(p.id, hashes)
+ err := pm.downloader.DeliverHashes(p.id, hashes)
if err != nil {
glog.V(logger.Debug).Infoln(err)
}
case GetBlocksMsg:
- var blocks []*types.Block
-
+ // Decode the retrieval message
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
if _, err := msgStream.List(); err != nil {
return err
}
+ // Gather blocks until the fetch or network limits is reached
var (
- i int
- totalsize common.StorageSize
+ hash common.Hash
+ bytes common.StorageSize
+ hashes []common.Hash
+ blocks []*types.Block
)
for {
- i++
- var hash common.Hash
err := msgStream.Decode(&hash)
if err == rlp.EOL {
break
} else if err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
+ hashes = append(hashes, hash)
- block := self.chainman.GetBlock(hash)
- if block != nil {
+ // Retrieve the requested block, stopping if enough was found
+ if block := pm.chainman.GetBlock(hash); block != nil {
blocks = append(blocks, block)
- totalsize += block.Size()
+ bytes += block.Size()
+ if len(blocks) >= downloader.MaxBlockFetch || bytes > maxBlockRespSize {
+ break
+ }
}
- if i == downloader.MaxBlockFetch || totalsize > maxBlockRespSize {
- break
+ }
+ if glog.V(logger.Detail) && len(blocks) == 0 && len(hashes) > 0 {
+ list := "["
+ for _, hash := range hashes {
+ list += fmt.Sprintf("%x, ", hash[:4])
}
+ list = list[:len(list)-2] + "]"
+
+ glog.Infof("Peer %s: no blocks found for requested hashes %s", p.id, list)
}
return p.sendBlocks(blocks)
@@ -291,20 +306,13 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
glog.V(logger.Detail).Infoln("Decode error", err)
blocks = nil
}
- // Filter out any explicitly requested blocks (cascading select to get blocking back to peer)
- filter := make(chan []*types.Block)
- select {
- case <-self.quitSync:
- case self.newBlockCh <- filter:
- select {
- case <-self.quitSync:
- case filter <- blocks:
- select {
- case <-self.quitSync:
- case blocks := <-filter:
- self.downloader.DeliverBlocks(p.id, blocks)
- }
- }
+ // Update the receive timestamp of each block
+ for i:=0; i<len(blocks); i++ {
+ blocks[i].ReceivedAt = msg.ReceivedAt
+ }
+ // Filter out any explicitly requested blocks, deliver the rest to the downloader
+ if blocks := pm.fetcher.Filter(blocks); len(blocks) > 0 {
+ pm.downloader.DeliverBlocks(p.id, blocks)
}
case NewBlockHashesMsg:
@@ -323,26 +331,16 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
// Schedule all the unknown hashes for retrieval
unknown := make([]common.Hash, 0, len(hashes))
for _, hash := range hashes {
- if !self.chainman.HasBlock(hash) {
+ if !pm.chainman.HasBlock(hash) {
unknown = append(unknown, hash)
}
}
- announces := make([]*blockAnnounce, len(unknown))
- for i, hash := range unknown {
- announces[i] = &blockAnnounce{
- hash: hash,
- peer: p,
- time: time.Now(),
- }
- }
- if len(announces) > 0 {
- select {
- case self.newHashCh <- announces:
- case <-self.quitSync:
- }
+ for _, hash := range unknown {
+ pm.fetcher.Notify(p.id, hash, time.Now(), p.requestBlocks)
}
case NewBlockMsg:
+ // Retrieve and decode the propagated block
var request newBlockMsgData
if err := msg.Decode(&request); err != nil {
return errResp(ErrDecode, "%v: %v", msg, err)
@@ -352,9 +350,24 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
}
request.Block.ReceivedAt = msg.ReceivedAt
- if err := self.importBlock(p, request.Block, request.TD); err != nil {
- return err
- }
+ // Mark the block's arrival for whatever reason
+ _, chainHead, _ := pm.chainman.Status()
+ jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
+ BlockHash: request.Block.Hash().Hex(),
+ BlockNumber: request.Block.Number(),
+ ChainHeadHash: chainHead.Hex(),
+ BlockPrevHash: request.Block.ParentHash().Hex(),
+ RemoteId: p.ID().String(),
+ })
+ // Mark the peer as owning the block and schedule it for import
+ p.blockHashes.Add(request.Block.Hash())
+ p.SetHead(request.Block.Hash())
+
+ pm.fetcher.Enqueue(p.id, request.Block)
+
+ // TODO: Schedule a sync to cover potential gaps (this needs proto update)
+ p.SetTd(request.TD)
+ go pm.synchronise(p)
default:
return errResp(ErrInvalidMsgCode, "%v", msg.Code)
@@ -362,76 +375,27 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
return nil
}
-// importBlocks injects a new block retrieved from the given peer into the chain
-// manager.
-func (pm *ProtocolManager) importBlock(p *peer, block *types.Block, td *big.Int) error {
+// BroadcastBlock will either propagate a block to a subset of it's peers, or
+// will only announce it's availability (depending what's requested).
+func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
hash := block.Hash()
+ peers := pm.peers.PeersWithoutBlock(hash)
- // Mark the block as present at the remote node (don't duplicate already held data)
- p.blockHashes.Add(hash)
- p.SetHead(hash)
- if td != nil {
- p.SetTd(td)
+ // If propagation is requested, send to a subset of the peer
+ if propagate {
+ transfer := peers[:int(math.Sqrt(float64(len(peers))))]
+ for _, peer := range transfer {
+ peer.sendNewBlock(block)
+ }
+ glog.V(logger.Detail).Infof("propagated block %x to %d peers in %v", hash[:4], len(transfer), time.Since(block.ReceivedAt))
}
- // Log the block's arrival
- _, chainHead, _ := pm.chainman.Status()
- jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
- BlockHash: hash.Hex(),
- BlockNumber: block.Number(),
- ChainHeadHash: chainHead.Hex(),
- BlockPrevHash: block.ParentHash().Hex(),
- RemoteId: p.ID().String(),
- })
- // If the block's already known or its difficulty is lower than ours, drop
+ // Otherwise if the block is indeed in out own chain, announce it
if pm.chainman.HasBlock(hash) {
- p.SetTd(pm.chainman.GetBlock(hash).Td) // update the peer's TD to the real value
- return nil
- }
- if td != nil && pm.chainman.Td().Cmp(td) > 0 && new(big.Int).Add(block.Number(), big.NewInt(7)).Cmp(pm.chainman.CurrentBlock().Number()) < 0 {
- glog.V(logger.Debug).Infof("[%s] dropped block %v due to low TD %v\n", p.id, block.Number(), td)
- return nil
- }
- // Attempt to insert the newly received block and propagate to our peers
- if pm.chainman.HasBlock(block.ParentHash()) {
- if _, err := pm.chainman.InsertChain(types.Blocks{block}); err != nil {
- glog.V(logger.Error).Infoln("removed peer (", p.id, ") due to block error", err)
- return err
+ for _, peer := range peers {
+ peer.sendNewBlockHashes([]common.Hash{hash})
}
- if td != nil && block.Td.Cmp(td) != 0 {
- err := fmt.Errorf("invalid TD on block(%v) from peer(%s): block.td=%v, request.td=%v", block.Number(), p.id, block.Td, td)
- glog.V(logger.Error).Infoln(err)
- return err
- }
- pm.BroadcastBlock(hash, block)
- return nil
- }
- // Parent of the block is unknown, try to sync with this peer if it seems to be good
- if td != nil {
- go pm.synchronise(p)
- }
- return nil
-}
-
-// BroadcastBlock will propagate the block to a subset of its connected peers,
-// only notifying the rest of the block's appearance.
-func (pm *ProtocolManager) BroadcastBlock(hash common.Hash, block *types.Block) {
- // Retrieve all the target peers and split between full broadcast or only notification
- peers := pm.peers.PeersWithoutBlock(hash)
- split := int(math.Sqrt(float64(len(peers))))
-
- transfer := peers[:split]
- notify := peers[split:]
-
- // Send out the data transfers and the notifications
- for _, peer := range notify {
- peer.sendNewBlockHashes([]common.Hash{hash})
- }
- glog.V(logger.Detail).Infoln("broadcast hash to", len(notify), "peers.")
-
- for _, peer := range transfer {
- peer.sendNewBlock(block)
+ glog.V(logger.Detail).Infof("announced block %x to %d peers in %v", hash[:4], len(peers), time.Since(block.ReceivedAt))
}
- glog.V(logger.Detail).Infoln("broadcast block to", len(transfer), "peers. Total processing time:", time.Since(block.ReceivedAt))
}
// BroadcastTx will propagate the block to its connected peers. It will sort
@@ -453,7 +417,8 @@ func (self *ProtocolManager) minedBroadcastLoop() {
for obj := range self.minedBlockSub.Chan() {
switch ev := obj.(type) {
case core.NewMinedBlockEvent:
- self.BroadcastBlock(ev.Block.Hash(), ev.Block)
+ self.BroadcastBlock(ev.Block, false)
+ self.BroadcastBlock(ev.Block, true)
}
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 17:11:33 +0800