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-rw-r--r--eth/peer.go194
1 files changed, 120 insertions, 74 deletions
diff --git a/eth/peer.go b/eth/peer.go
index c7045282b..ccd5d3c6f 100644
--- a/eth/peer.go
+++ b/eth/peer.go
@@ -1,3 +1,19 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
package eth
import (
@@ -20,25 +36,18 @@ var (
errNotRegistered = errors.New("peer is not registered")
)
-type statusMsgData struct {
- ProtocolVersion uint32
- NetworkId uint32
- TD *big.Int
- CurrentBlock common.Hash
- GenesisBlock common.Hash
-}
-
-type getBlockHashesMsgData struct {
- Hash common.Hash
- Amount uint64
-}
+const (
+ maxKnownTxs = 32768 // Maximum transactions hashes to keep in the known list (prevent DOS)
+ maxKnownBlocks = 1024 // Maximum block hashes to keep in the known list (prevent DOS)
+)
type peer struct {
*p2p.Peer
rw p2p.MsgReadWriter
- protv, netid int
+ version int // Protocol version negotiated
+ network int // Network ID being on
id string
@@ -46,27 +55,21 @@ type peer struct {
td *big.Int
lock sync.RWMutex
- genesis, ourHash common.Hash
- ourTd *big.Int
-
- txHashes *set.Set
- blockHashes *set.Set
+ knownTxs *set.Set // Set of transaction hashes known to be known by this peer
+ knownBlocks *set.Set // Set of block hashes known to be known by this peer
}
-func newPeer(protv, netid int, genesis, head common.Hash, td *big.Int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
+func newPeer(version, network int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
id := p.ID()
return &peer{
Peer: p,
rw: rw,
- genesis: genesis,
- ourHash: head,
- ourTd: td,
- protv: protv,
- netid: netid,
+ version: version,
+ network: network,
id: fmt.Sprintf("%x", id[:8]),
- txHashes: set.New(),
- blockHashes: set.New(),
+ knownTxs: set.New(),
+ knownBlocks: set.New(),
}
}
@@ -103,68 +106,110 @@ func (p *peer) SetTd(td *big.Int) {
p.td.Set(td)
}
-// sendTransactions sends transactions to the peer and includes the hashes
-// in it's tx hash set for future reference. The tx hash will allow the
-// manager to check whether the peer has already received this particular
-// transaction
-func (p *peer) sendTransactions(txs types.Transactions) error {
- for _, tx := range txs {
- p.txHashes.Add(tx.Hash())
+// MarkBlock marks a block as known for the peer, ensuring that the block will
+// never be propagated to this particular peer.
+func (p *peer) MarkBlock(hash common.Hash) {
+ // If we reached the memory allowance, drop a previously known block hash
+ for p.knownBlocks.Size() >= maxKnownBlocks {
+ p.knownBlocks.Pop()
}
+ p.knownBlocks.Add(hash)
+}
+
+// MarkTransaction marks a transaction as known for the peer, ensuring that it
+// will never be propagated to this particular peer.
+func (p *peer) MarkTransaction(hash common.Hash) {
+ // If we reached the memory allowance, drop a previously known transaction hash
+ for p.knownTxs.Size() >= maxKnownTxs {
+ p.knownTxs.Pop()
+ }
+ p.knownTxs.Add(hash)
+}
+// SendTransactions sends transactions to the peer and includes the hashes
+// in its transaction hash set for future reference.
+func (p *peer) SendTransactions(txs types.Transactions) error {
+ propTxnOutPacketsMeter.Mark(1)
+ for _, tx := range txs {
+ propTxnOutTrafficMeter.Mark(tx.Size().Int64())
+ p.knownTxs.Add(tx.Hash())
+ }
return p2p.Send(p.rw, TxMsg, txs)
}
-func (p *peer) sendBlockHashes(hashes []common.Hash) error {
+// SendBlockHashes sends a batch of known hashes to the remote peer.
+func (p *peer) SendBlockHashes(hashes []common.Hash) error {
+ reqHashOutPacketsMeter.Mark(1)
+ reqHashOutTrafficMeter.Mark(int64(32 * len(hashes)))
+
return p2p.Send(p.rw, BlockHashesMsg, hashes)
}
-func (p *peer) sendBlocks(blocks []*types.Block) error {
+// SendBlocks sends a batch of blocks to the remote peer.
+func (p *peer) SendBlocks(blocks []*types.Block) error {
+ reqBlockOutPacketsMeter.Mark(1)
+ for _, block := range blocks {
+ reqBlockOutTrafficMeter.Mark(block.Size().Int64())
+ }
return p2p.Send(p.rw, BlocksMsg, blocks)
}
-func (p *peer) sendNewBlockHashes(hashes []common.Hash) error {
+// SendNewBlockHashes announces the availability of a number of blocks through
+// a hash notification.
+func (p *peer) SendNewBlockHashes(hashes []common.Hash) error {
+ propHashOutPacketsMeter.Mark(1)
+ propHashOutTrafficMeter.Mark(int64(32 * len(hashes)))
+
for _, hash := range hashes {
- p.blockHashes.Add(hash)
+ p.knownBlocks.Add(hash)
}
return p2p.Send(p.rw, NewBlockHashesMsg, hashes)
}
-func (p *peer) sendNewBlock(block *types.Block) error {
- p.blockHashes.Add(block.Hash())
+// SendNewBlock propagates an entire block to a remote peer.
+func (p *peer) SendNewBlock(block *types.Block) error {
+ propBlockOutPacketsMeter.Mark(1)
+ propBlockOutTrafficMeter.Mark(block.Size().Int64())
+ p.knownBlocks.Add(block.Hash())
return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, block.Td})
}
-func (p *peer) sendTransaction(tx *types.Transaction) error {
- p.txHashes.Add(tx.Hash())
-
- return p2p.Send(p.rw, TxMsg, []*types.Transaction{tx})
+// RequestHashes fetches a batch of hashes from a peer, starting at from, going
+// towards the genesis block.
+func (p *peer) RequestHashes(from common.Hash) error {
+ glog.V(logger.Debug).Infof("Peer [%s] fetching hashes (%d) from %x...\n", p.id, downloader.MaxHashFetch, from[:4])
+ return p2p.Send(p.rw, GetBlockHashesMsg, getBlockHashesData{from, uint64(downloader.MaxHashFetch)})
}
-func (p *peer) requestHashes(from common.Hash) error {
- glog.V(logger.Debug).Infof("[%s] fetching hashes (%d) %x...\n", p.id, downloader.MaxHashFetch, from[:4])
- return p2p.Send(p.rw, GetBlockHashesMsg, getBlockHashesMsgData{from, uint64(downloader.MaxHashFetch)})
+// RequestHashesFromNumber fetches a batch of hashes from a peer, starting at the
+// requested block number, going upwards towards the genesis block.
+func (p *peer) RequestHashesFromNumber(from uint64, count int) error {
+ glog.V(logger.Debug).Infof("Peer [%s] fetching hashes (%d) from #%d...\n", p.id, count, from)
+ return p2p.Send(p.rw, GetBlockHashesFromNumberMsg, getBlockHashesFromNumberData{from, uint64(count)})
}
-func (p *peer) requestBlocks(hashes []common.Hash) error {
+// RequestBlocks fetches a batch of blocks corresponding to the specified hashes.
+func (p *peer) RequestBlocks(hashes []common.Hash) error {
glog.V(logger.Debug).Infof("[%s] fetching %v blocks\n", p.id, len(hashes))
return p2p.Send(p.rw, GetBlocksMsg, hashes)
}
-func (p *peer) handleStatus() error {
+// Handshake executes the eth protocol handshake, negotiating version number,
+// network IDs, difficulties, head and genesis blocks.
+func (p *peer) Handshake(td *big.Int, head common.Hash, genesis common.Hash) error {
+ // Send out own handshake in a new thread
errc := make(chan error, 1)
go func() {
- errc <- p2p.Send(p.rw, StatusMsg, &statusMsgData{
- ProtocolVersion: uint32(p.protv),
- NetworkId: uint32(p.netid),
- TD: p.ourTd,
- CurrentBlock: p.ourHash,
- GenesisBlock: p.genesis,
+ errc <- p2p.Send(p.rw, StatusMsg, &statusData{
+ ProtocolVersion: uint32(p.version),
+ NetworkId: uint32(p.network),
+ TD: td,
+ CurrentBlock: head,
+ GenesisBlock: genesis,
})
}()
-
- // read and handle remote status
+ // In the mean time retrieve the remote status message
msg, err := p.rw.ReadMsg()
if err != nil {
return err
@@ -175,31 +220,32 @@ func (p *peer) handleStatus() error {
if msg.Size > ProtocolMaxMsgSize {
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
-
- var status statusMsgData
+ // Decode the handshake and make sure everything matches
+ var status statusData
if err := msg.Decode(&status); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
-
- if status.GenesisBlock != p.genesis {
- return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, p.genesis)
+ if status.GenesisBlock != genesis {
+ return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesis)
}
-
- if int(status.NetworkId) != p.netid {
- return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, p.netid)
+ if int(status.NetworkId) != p.network {
+ return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, p.network)
}
-
- if int(status.ProtocolVersion) != p.protv {
- return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.protv)
+ if int(status.ProtocolVersion) != p.version {
+ return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.version)
}
- // Set the total difficulty of the peer
- p.td = status.TD
- // set the best hash of the peer
- p.head = status.CurrentBlock
-
+ // Configure the remote peer, and sanity check out handshake too
+ p.td, p.head = status.TD, status.CurrentBlock
return <-errc
}
+// String implements fmt.Stringer.
+func (p *peer) String() string {
+ return fmt.Sprintf("Peer %s [%s]", p.id,
+ fmt.Sprintf("eth/%2d", p.version),
+ )
+}
+
// peerSet represents the collection of active peers currently participating in
// the Ethereum sub-protocol.
type peerSet struct {
@@ -264,7 +310,7 @@ func (ps *peerSet) PeersWithoutBlock(hash common.Hash) []*peer {
list := make([]*peer, 0, len(ps.peers))
for _, p := range ps.peers {
- if !p.blockHashes.Has(hash) {
+ if !p.knownBlocks.Has(hash) {
list = append(list, p)
}
}
@@ -279,7 +325,7 @@ func (ps *peerSet) PeersWithoutTx(hash common.Hash) []*peer {
list := make([]*peer, 0, len(ps.peers))
for _, p := range ps.peers {
- if !p.txHashes.Has(hash) {
+ if !p.knownTxs.Has(hash) {
list = append(list, p)
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 06:36:03 +0800