diff options
Diffstat (limited to 'eth')
| -rw-r--r-- | eth/handler.go | 180 | ||||
| -rw-r--r-- | eth/peer.go | 4 | ||||
| -rw-r--r-- | eth/protocol.go | 2 |
3 files changed, 123 insertions, 63 deletions
diff --git a/eth/handler.go b/eth/handler.go index aea33452c..63ebc4bdd 100644 --- a/eth/handler.go +++ b/eth/handler.go @@ -2,6 +2,7 @@ package eth import ( "fmt" + "math" "math/big" "sync" "time" @@ -20,6 +21,7 @@ import ( const ( forceSyncCycle = 10 * time.Second // Time interval to force syncs, even if few peers are available blockProcCycle = 500 * time.Millisecond // Time interval to check for new blocks to process + blockArrivalTimeout = 500 * time.Millisecond // Time allowance before an announced block is explicitly requested minDesiredPeerCount = 5 // Amount of peers desired to start syncing blockProcAmount = 256 ) @@ -186,7 +188,6 @@ func (self *ProtocolManager) handleMsg(p *peer) error { defer msg.Discard() switch msg.Code { - case GetTxMsg: // ignore case StatusMsg: return errResp(ErrExtraStatusMsg, "uncontrolled status message") @@ -227,6 +228,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error { // returns either requested hashes or nothing (i.e. not found) return p.sendBlockHashes(hashes) + case BlockHashesMsg: msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size)) @@ -266,6 +268,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error { } } return p.sendBlocks(blocks) + case BlocksMsg: var blocks []*types.Block @@ -274,7 +277,57 @@ func (self *ProtocolManager) handleMsg(p *peer) error { glog.V(logger.Detail).Infoln("Decode error", err) blocks = nil } - self.downloader.DeliverBlocks(p.id, blocks) + + // Either deliver to the downloader or the importer + if self.downloader.Synchronising() { + self.downloader.DeliverBlocks(p.id, blocks) + } else { + for _, block := range blocks { + if err := self.importBlock(p, block, nil); err != nil { + return err + } + } + } + + case NewBlockHashesMsg: + // Retrieve and deseralize the remote new block hashes notification + msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size)) + + var hashes []common.Hash + if err := msgStream.Decode(&hashes); err != nil { + break + } + // Mark the hashes as present at the remote node + for _, hash := range hashes { + p.blockHashes.Add(hash) + p.recentHash = hash + } + // Wait a bit for potentially receiving the blocks, fetch if not + go func() { + time.Sleep(blockArrivalTimeout) + + // Drop all the hashes that are already known + unknown := make([]common.Hash, 0, len(hashes)) + for _, hash := range hashes { + if !self.chainman.HasBlock(hash) { + unknown = append(unknown, hash) + } + } + if len(unknown) == 0 { + return + } + // Retrieve all the unknown hashes + if err := p.requestBlocks(unknown); err != nil { + glog.V(logger.Debug).Infof("%s: failed to request blocks: %v", p.id, err) + } + if glog.V(logger.Detail) { + hashes := make([]string, len(unknown)) + for i, hash := range unknown { + hashes[i] = fmt.Sprintf("%x", hash[:4]) + } + glog.Infof("%s: requested blocks explicitly: %v", p.id, hashes) + } + }() case NewBlockMsg: var request newBlockMsgData @@ -286,83 +339,86 @@ func (self *ProtocolManager) handleMsg(p *peer) error { } request.Block.ReceivedAt = msg.ReceivedAt - hash := request.Block.Hash() - // Add the block hash as a known hash to the peer. This will later be used to determine - // who should receive this. - p.blockHashes.Add(hash) - // update the peer info - p.recentHash = hash - p.td = request.TD - - _, chainHead, _ := self.chainman.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: p.ID().String(), - }) - - // Make sure the block isn't already known. If this is the case simply drop - // the message and move on. If the TD is < currentTd; drop it as well. If this - // chain at some point becomes canonical, the downloader will fetch it. - if self.chainman.HasBlock(hash) { - break - } - if self.chainman.Td().Cmp(request.TD) > 0 && new(big.Int).Add(request.Block.Number(), big.NewInt(7)).Cmp(self.chainman.CurrentBlock().Number()) < 0 { - glog.V(logger.Debug).Infof("[%s] dropped block %v due to low TD %v\n", p.id, request.Block.Number(), request.TD) - break + if err := self.importBlock(p, request.Block, request.TD); err != nil { + return err } - // Attempt to insert the newly received by checking if the parent exists. - // if the parent exists we process the block and propagate to our peers - // otherwise synchronize with the peer - if self.chainman.HasBlock(request.Block.ParentHash()) { - if _, err := self.chainman.InsertChain(types.Blocks{request.Block}); err != nil { - glog.V(logger.Error).Infoln("removed peer (", p.id, ") due to block error") - - self.removePeer(p.id) - - return nil - } - - if err := self.verifyTd(p, request); err != nil { - glog.V(logger.Error).Infoln(err) - // XXX for now return nil so it won't disconnect (we should in the future) - return nil - } - self.BroadcastBlock(hash, request.Block) - } else { - go self.synchronise(p) - } default: return errResp(ErrInvalidMsgCode, "%v", msg.Code) } return nil } -func (pm *ProtocolManager) verifyTd(peer *peer, request newBlockMsgData) error { - if request.Block.Td.Cmp(request.TD) != 0 { - glog.V(logger.Detail).Infoln(peer) +// 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 { + hash := block.Hash() - return fmt.Errorf("invalid TD on block(%v) from peer(%s): block.td=%v, request.td=%v", request.Block.Number(), peer.id, request.Block.Td, request.TD) + // Mark the block as present at the remote node (don't duplicate already held data) + p.blockHashes.Add(hash) + p.recentHash = hash + if td != nil { + p.td = td + } + // Log the block's arrival + _, chainHead, _ := pm.chainman.Status() + jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{ + BlockHash: hash.Hex(), + BlockNumber: block.Number(), // this surely must be zero + 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 + if pm.chainman.HasBlock(hash) { + p.td = 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 + } + 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 its connected peers. It will sort -// out which peers do not contain the block in their block set and will do a -// sqrt(peers) to determine the amount of peers we broadcast to. +// 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) { - // Broadcast block to a batch of peers not knowing about it + // Retrieve all the target peers and split between full broadcast or only notification peers := pm.peers.PeersWithoutBlock(hash) - //peers = peers[:int(math.Sqrt(float64(len(peers))))] - for _, peer := range peers { + split := int(math.Sqrt(float64(len(peers)))) + + transfer := peers[:split] + nofity := peers[split:] + + // Send out the data transfers and the notifications + for _, peer := range nofity { + peer.sendNewBlockHashes([]common.Hash{hash}) + } + glog.V(logger.Detail).Infoln("broadcast hash to", len(nofity), "peers.") + + for _, peer := range transfer { peer.sendNewBlock(block) } - glog.V(logger.Detail).Infoln("broadcast block to", len(peers), "peers. Total processing time:", 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 diff --git a/eth/peer.go b/eth/peer.go index bb6a20349..1146ebde3 100644 --- a/eth/peer.go +++ b/eth/peer.go @@ -88,6 +88,10 @@ func (p *peer) sendBlocks(blocks []*types.Block) error { return p2p.Send(p.rw, BlocksMsg, blocks) } +func (p *peer) sendNewBlockHashes(hashes []common.Hash) error { + return p2p.Send(p.rw, NewBlockHashesMsg, hashes) +} + func (p *peer) sendNewBlock(block *types.Block) error { p.blockHashes.Add(block.Hash()) diff --git a/eth/protocol.go b/eth/protocol.go index 948051ed1..9ccf2cb60 100644 --- a/eth/protocol.go +++ b/eth/protocol.go @@ -17,7 +17,7 @@ const ( // eth protocol message codes const ( StatusMsg = iota - GetTxMsg // unused + NewBlockHashesMsg TxMsg GetBlockHashesMsg BlockHashesMsg |