Merge eth-go repository into go-ethereum
mist, etheruem have been moved to cmd/
This commit is contained in:
Felix Lange
892
peer.go
Normal file
892
peer.go
Normal file
@ -0,0 +1,892 @@
|
||||
package eth
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"container/list"
|
||||
"fmt"
|
||||
"math"
|
||||
"math/big"
|
||||
"net"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"github.com/ethereum/go-ethereum/ethchain"
|
||||
"github.com/ethereum/go-ethereum/ethlog"
|
||||
"github.com/ethereum/go-ethereum/ethutil"
|
||||
"github.com/ethereum/go-ethereum/ethwire"
|
||||
)
|
||||
|
||||
var peerlogger = ethlog.NewLogger("PEER")
|
||||
|
||||
const (
|
||||
// The size of the output buffer for writing messages
|
||||
outputBufferSize = 50
|
||||
// Current protocol version
|
||||
ProtocolVersion = 36
|
||||
// Current P2P version
|
||||
P2PVersion = 2
|
||||
// Ethereum network version
|
||||
NetVersion = 0
|
||||
// Interval for ping/pong message
|
||||
pingPongTimer = 2 * time.Second
|
||||
)
|
||||
|
||||
type DiscReason byte
|
||||
|
||||
const (
|
||||
// Values are given explicitly instead of by iota because these values are
|
||||
// defined by the wire protocol spec; it is easier for humans to ensure
|
||||
// correctness when values are explicit.
|
||||
DiscRequested DiscReason = iota
|
||||
DiscReTcpSysErr
|
||||
DiscBadProto
|
||||
DiscBadPeer
|
||||
DiscTooManyPeers
|
||||
DiscConnDup
|
||||
DiscGenesisErr
|
||||
DiscProtoErr
|
||||
DiscQuitting
|
||||
)
|
||||
|
||||
var discReasonToString = []string{
|
||||
"requested",
|
||||
"TCP sys error",
|
||||
"bad protocol",
|
||||
"useless peer",
|
||||
"too many peers",
|
||||
"already connected",
|
||||
"wrong genesis block",
|
||||
"incompatible network",
|
||||
"quitting",
|
||||
}
|
||||
|
||||
func (d DiscReason) String() string {
|
||||
if len(discReasonToString) < int(d) {
|
||||
return "Unknown"
|
||||
}
|
||||
|
||||
return discReasonToString[d]
|
||||
}
|
||||
|
||||
// Peer capabilities
|
||||
type Caps byte
|
||||
|
||||
const (
|
||||
CapPeerDiscTy Caps = 1 << iota
|
||||
CapTxTy
|
||||
CapChainTy
|
||||
|
||||
CapDefault = CapChainTy | CapTxTy | CapPeerDiscTy
|
||||
)
|
||||
|
||||
var capsToString = map[Caps]string{
|
||||
CapPeerDiscTy: "Peer discovery",
|
||||
CapTxTy: "Transaction relaying",
|
||||
CapChainTy: "Block chain relaying",
|
||||
}
|
||||
|
||||
func (c Caps) IsCap(cap Caps) bool {
|
||||
return c&cap > 0
|
||||
}
|
||||
|
||||
func (c Caps) String() string {
|
||||
var caps []string
|
||||
if c.IsCap(CapPeerDiscTy) {
|
||||
caps = append(caps, capsToString[CapPeerDiscTy])
|
||||
}
|
||||
if c.IsCap(CapChainTy) {
|
||||
caps = append(caps, capsToString[CapChainTy])
|
||||
}
|
||||
if c.IsCap(CapTxTy) {
|
||||
caps = append(caps, capsToString[CapTxTy])
|
||||
}
|
||||
|
||||
return strings.Join(caps, " | ")
|
||||
}
|
||||
|
||||
type Peer struct {
|
||||
// Ethereum interface
|
||||
ethereum *Ethereum
|
||||
// Net connection
|
||||
conn net.Conn
|
||||
// Output queue which is used to communicate and handle messages
|
||||
outputQueue chan *ethwire.Msg
|
||||
// Quit channel
|
||||
quit chan bool
|
||||
// Determines whether it's an inbound or outbound peer
|
||||
inbound bool
|
||||
// Flag for checking the peer's connectivity state
|
||||
connected int32
|
||||
disconnect int32
|
||||
// Last known message send
|
||||
lastSend time.Time
|
||||
// Indicated whether a verack has been send or not
|
||||
// This flag is used by writeMessage to check if messages are allowed
|
||||
// to be send or not. If no version is known all messages are ignored.
|
||||
versionKnown bool
|
||||
statusKnown bool
|
||||
|
||||
// Last received pong message
|
||||
lastPong int64
|
||||
lastBlockReceived time.Time
|
||||
doneFetchingHashes bool
|
||||
|
||||
host []byte
|
||||
port uint16
|
||||
caps Caps
|
||||
td *big.Int
|
||||
bestHash []byte
|
||||
lastReceivedHash []byte
|
||||
requestedHashes [][]byte
|
||||
|
||||
// This peer's public key
|
||||
pubkey []byte
|
||||
|
||||
// Indicated whether the node is catching up or not
|
||||
catchingUp bool
|
||||
diverted bool
|
||||
blocksRequested int
|
||||
|
||||
version string
|
||||
|
||||
// We use this to give some kind of pingtime to a node, not very accurate, could be improved.
|
||||
pingTime time.Duration
|
||||
pingStartTime time.Time
|
||||
|
||||
lastRequestedBlock *ethchain.Block
|
||||
|
||||
protocolCaps *ethutil.Value
|
||||
}
|
||||
|
||||
func NewPeer(conn net.Conn, ethereum *Ethereum, inbound bool) *Peer {
|
||||
pubkey := ethereum.KeyManager().PublicKey()[1:]
|
||||
|
||||
return &Peer{
|
||||
outputQueue: make(chan *ethwire.Msg, outputBufferSize),
|
||||
quit: make(chan bool),
|
||||
ethereum: ethereum,
|
||||
conn: conn,
|
||||
inbound: inbound,
|
||||
disconnect: 0,
|
||||
connected: 1,
|
||||
port: 30303,
|
||||
pubkey: pubkey,
|
||||
blocksRequested: 10,
|
||||
caps: ethereum.ServerCaps(),
|
||||
version: ethereum.ClientIdentity().String(),
|
||||
protocolCaps: ethutil.NewValue(nil),
|
||||
td: big.NewInt(0),
|
||||
doneFetchingHashes: true,
|
||||
}
|
||||
}
|
||||
|
||||
func NewOutboundPeer(addr string, ethereum *Ethereum, caps Caps) *Peer {
|
||||
p := &Peer{
|
||||
outputQueue: make(chan *ethwire.Msg, outputBufferSize),
|
||||
quit: make(chan bool),
|
||||
ethereum: ethereum,
|
||||
inbound: false,
|
||||
connected: 0,
|
||||
disconnect: 0,
|
||||
port: 30303,
|
||||
caps: caps,
|
||||
version: ethereum.ClientIdentity().String(),
|
||||
protocolCaps: ethutil.NewValue(nil),
|
||||
td: big.NewInt(0),
|
||||
doneFetchingHashes: true,
|
||||
}
|
||||
|
||||
// Set up the connection in another goroutine so we don't block the main thread
|
||||
go func() {
|
||||
conn, err := p.Connect(addr)
|
||||
if err != nil {
|
||||
//peerlogger.Debugln("Connection to peer failed. Giving up.", err)
|
||||
p.Stop()
|
||||
return
|
||||
}
|
||||
p.conn = conn
|
||||
|
||||
// Atomically set the connection state
|
||||
atomic.StoreInt32(&p.connected, 1)
|
||||
atomic.StoreInt32(&p.disconnect, 0)
|
||||
|
||||
p.Start()
|
||||
}()
|
||||
|
||||
return p
|
||||
}
|
||||
|
||||
func (self *Peer) Connect(addr string) (conn net.Conn, err error) {
|
||||
const maxTries = 3
|
||||
for attempts := 0; attempts < maxTries; attempts++ {
|
||||
conn, err = net.DialTimeout("tcp", addr, 10*time.Second)
|
||||
if err != nil {
|
||||
time.Sleep(time.Duration(attempts*20) * time.Second)
|
||||
continue
|
||||
}
|
||||
|
||||
// Success
|
||||
return
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// Getters
|
||||
func (p *Peer) PingTime() string {
|
||||
return p.pingTime.String()
|
||||
}
|
||||
func (p *Peer) Inbound() bool {
|
||||
return p.inbound
|
||||
}
|
||||
func (p *Peer) LastSend() time.Time {
|
||||
return p.lastSend
|
||||
}
|
||||
func (p *Peer) LastPong() int64 {
|
||||
return p.lastPong
|
||||
}
|
||||
func (p *Peer) Host() []byte {
|
||||
return p.host
|
||||
}
|
||||
func (p *Peer) Port() uint16 {
|
||||
return p.port
|
||||
}
|
||||
func (p *Peer) Version() string {
|
||||
return p.version
|
||||
}
|
||||
func (p *Peer) Connected() *int32 {
|
||||
return &p.connected
|
||||
}
|
||||
|
||||
// Setters
|
||||
func (p *Peer) SetVersion(version string) {
|
||||
p.version = version
|
||||
}
|
||||
|
||||
// Outputs any RLP encoded data to the peer
|
||||
func (p *Peer) QueueMessage(msg *ethwire.Msg) {
|
||||
if atomic.LoadInt32(&p.connected) != 1 {
|
||||
return
|
||||
}
|
||||
p.outputQueue <- msg
|
||||
}
|
||||
|
||||
func (p *Peer) writeMessage(msg *ethwire.Msg) {
|
||||
// Ignore the write if we're not connected
|
||||
if atomic.LoadInt32(&p.connected) != 1 {
|
||||
return
|
||||
}
|
||||
|
||||
if !p.versionKnown {
|
||||
switch msg.Type {
|
||||
case ethwire.MsgHandshakeTy: // Ok
|
||||
default: // Anything but ack is allowed
|
||||
return
|
||||
}
|
||||
} else {
|
||||
/*
|
||||
if !p.statusKnown {
|
||||
switch msg.Type {
|
||||
case ethwire.MsgStatusTy: // Ok
|
||||
default: // Anything but ack is allowed
|
||||
return
|
||||
}
|
||||
}
|
||||
*/
|
||||
}
|
||||
|
||||
peerlogger.DebugDetailf("(%v) <= %v\n", p.conn.RemoteAddr(), formatMessage(msg))
|
||||
|
||||
err := ethwire.WriteMessage(p.conn, msg)
|
||||
if err != nil {
|
||||
peerlogger.Debugln(" Can't send message:", err)
|
||||
// Stop the client if there was an error writing to it
|
||||
p.Stop()
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Outbound message handler. Outbound messages are handled here
|
||||
func (p *Peer) HandleOutbound() {
|
||||
// The ping timer. Makes sure that every 2 minutes a ping is send to the peer
|
||||
pingTimer := time.NewTicker(pingPongTimer)
|
||||
serviceTimer := time.NewTicker(10 * time.Second)
|
||||
|
||||
out:
|
||||
for {
|
||||
skip:
|
||||
select {
|
||||
// Main message queue. All outbound messages are processed through here
|
||||
case msg := <-p.outputQueue:
|
||||
if !p.statusKnown {
|
||||
switch msg.Type {
|
||||
case ethwire.MsgTxTy, ethwire.MsgGetBlockHashesTy, ethwire.MsgBlockHashesTy, ethwire.MsgGetBlocksTy, ethwire.MsgBlockTy:
|
||||
break skip
|
||||
}
|
||||
}
|
||||
|
||||
p.writeMessage(msg)
|
||||
p.lastSend = time.Now()
|
||||
|
||||
// Ping timer
|
||||
case <-pingTimer.C:
|
||||
/*
|
||||
timeSince := time.Since(time.Unix(p.lastPong, 0))
|
||||
if !p.pingStartTime.IsZero() && p.lastPong != 0 && timeSince > (pingPongTimer+30*time.Second) {
|
||||
peerlogger.Infof("Peer did not respond to latest pong fast enough, it took %s, disconnecting.\n", timeSince)
|
||||
p.Stop()
|
||||
return
|
||||
}
|
||||
*/
|
||||
p.writeMessage(ethwire.NewMessage(ethwire.MsgPingTy, ""))
|
||||
p.pingStartTime = time.Now()
|
||||
|
||||
// Service timer takes care of peer broadcasting, transaction
|
||||
// posting or block posting
|
||||
case <-serviceTimer.C:
|
||||
p.QueueMessage(ethwire.NewMessage(ethwire.MsgGetPeersTy, ""))
|
||||
|
||||
case <-p.quit:
|
||||
// Break out of the for loop if a quit message is posted
|
||||
break out
|
||||
}
|
||||
}
|
||||
|
||||
clean:
|
||||
// This loop is for draining the output queue and anybody waiting for us
|
||||
for {
|
||||
select {
|
||||
case <-p.outputQueue:
|
||||
// TODO
|
||||
default:
|
||||
break clean
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func formatMessage(msg *ethwire.Msg) (ret string) {
|
||||
ret = fmt.Sprintf("%v %v", msg.Type, msg.Data)
|
||||
|
||||
/*
|
||||
XXX Commented out because I need the log level here to determine
|
||||
if i should or shouldn't generate this message
|
||||
*/
|
||||
/*
|
||||
switch msg.Type {
|
||||
case ethwire.MsgPeersTy:
|
||||
ret += fmt.Sprintf("(%d entries)", msg.Data.Len())
|
||||
case ethwire.MsgBlockTy:
|
||||
b1, b2 := ethchain.NewBlockFromRlpValue(msg.Data.Get(0)), ethchain.NewBlockFromRlpValue(msg.Data.Get(msg.Data.Len()-1))
|
||||
ret += fmt.Sprintf("(%d entries) %x - %x", msg.Data.Len(), b1.Hash()[0:4], b2.Hash()[0:4])
|
||||
case ethwire.MsgBlockHashesTy:
|
||||
h1, h2 := msg.Data.Get(0).Bytes(), msg.Data.Get(msg.Data.Len()-1).Bytes()
|
||||
ret += fmt.Sprintf("(%d entries) %x - %x", msg.Data.Len(), h1, h2)
|
||||
}
|
||||
*/
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// Inbound handler. Inbound messages are received here and passed to the appropriate methods
|
||||
func (p *Peer) HandleInbound() {
|
||||
for atomic.LoadInt32(&p.disconnect) == 0 {
|
||||
|
||||
// HMM?
|
||||
time.Sleep(50 * time.Millisecond)
|
||||
// Wait for a message from the peer
|
||||
msgs, err := ethwire.ReadMessages(p.conn)
|
||||
if err != nil {
|
||||
peerlogger.Debugln(err)
|
||||
}
|
||||
for _, msg := range msgs {
|
||||
peerlogger.DebugDetailf("(%v) => %v\n", p.conn.RemoteAddr(), formatMessage(msg))
|
||||
|
||||
switch msg.Type {
|
||||
case ethwire.MsgHandshakeTy:
|
||||
// Version message
|
||||
p.handleHandshake(msg)
|
||||
|
||||
//if p.caps.IsCap(CapPeerDiscTy) {
|
||||
p.QueueMessage(ethwire.NewMessage(ethwire.MsgGetPeersTy, ""))
|
||||
//}
|
||||
|
||||
case ethwire.MsgDiscTy:
|
||||
p.Stop()
|
||||
peerlogger.Infoln("Disconnect peer: ", DiscReason(msg.Data.Get(0).Uint()))
|
||||
case ethwire.MsgPingTy:
|
||||
// Respond back with pong
|
||||
p.QueueMessage(ethwire.NewMessage(ethwire.MsgPongTy, ""))
|
||||
case ethwire.MsgPongTy:
|
||||
// If we received a pong back from a peer we set the
|
||||
// last pong so the peer handler knows this peer is still
|
||||
// active.
|
||||
p.lastPong = time.Now().Unix()
|
||||
p.pingTime = time.Since(p.pingStartTime)
|
||||
case ethwire.MsgTxTy:
|
||||
// If the message was a transaction queue the transaction
|
||||
// in the TxPool where it will undergo validation and
|
||||
// processing when a new block is found
|
||||
for i := 0; i < msg.Data.Len(); i++ {
|
||||
tx := ethchain.NewTransactionFromValue(msg.Data.Get(i))
|
||||
p.ethereum.TxPool().QueueTransaction(tx)
|
||||
}
|
||||
case ethwire.MsgGetPeersTy:
|
||||
// Peer asked for list of connected peers
|
||||
//p.pushPeers()
|
||||
case ethwire.MsgPeersTy:
|
||||
// Received a list of peers (probably because MsgGetPeersTy was send)
|
||||
data := msg.Data
|
||||
// Create new list of possible peers for the ethereum to process
|
||||
peers := make([]string, data.Len())
|
||||
// Parse each possible peer
|
||||
for i := 0; i < data.Len(); i++ {
|
||||
value := data.Get(i)
|
||||
peers[i] = unpackAddr(value.Get(0), value.Get(1).Uint())
|
||||
}
|
||||
|
||||
// Connect to the list of peers
|
||||
p.ethereum.ProcessPeerList(peers)
|
||||
|
||||
case ethwire.MsgStatusTy:
|
||||
// Handle peer's status msg
|
||||
p.handleStatus(msg)
|
||||
}
|
||||
|
||||
// TMP
|
||||
if p.statusKnown {
|
||||
switch msg.Type {
|
||||
/*
|
||||
case ethwire.MsgGetTxsTy:
|
||||
// Get the current transactions of the pool
|
||||
txs := p.ethereum.TxPool().CurrentTransactions()
|
||||
// Get the RlpData values from the txs
|
||||
txsInterface := make([]interface{}, len(txs))
|
||||
for i, tx := range txs {
|
||||
txsInterface[i] = tx.RlpData()
|
||||
}
|
||||
// Broadcast it back to the peer
|
||||
p.QueueMessage(ethwire.NewMessage(ethwire.MsgTxTy, txsInterface))
|
||||
*/
|
||||
|
||||
case ethwire.MsgGetBlockHashesTy:
|
||||
if msg.Data.Len() < 2 {
|
||||
peerlogger.Debugln("err: argument length invalid ", msg.Data.Len())
|
||||
}
|
||||
|
||||
hash := msg.Data.Get(0).Bytes()
|
||||
amount := msg.Data.Get(1).Uint()
|
||||
|
||||
hashes := p.ethereum.ChainManager().GetChainHashesFromHash(hash, amount)
|
||||
|
||||
p.QueueMessage(ethwire.NewMessage(ethwire.MsgBlockHashesTy, ethutil.ByteSliceToInterface(hashes)))
|
||||
|
||||
case ethwire.MsgGetBlocksTy:
|
||||
// Limit to max 300 blocks
|
||||
max := int(math.Min(float64(msg.Data.Len()), 300.0))
|
||||
var blocks []interface{}
|
||||
|
||||
for i := 0; i < max; i++ {
|
||||
hash := msg.Data.Get(i).Bytes()
|
||||
block := p.ethereum.ChainManager().GetBlock(hash)
|
||||
if block != nil {
|
||||
blocks = append(blocks, block.Value().Raw())
|
||||
}
|
||||
}
|
||||
|
||||
p.QueueMessage(ethwire.NewMessage(ethwire.MsgBlockTy, blocks))
|
||||
|
||||
case ethwire.MsgBlockHashesTy:
|
||||
p.catchingUp = true
|
||||
|
||||
blockPool := p.ethereum.blockPool
|
||||
|
||||
foundCommonHash := false
|
||||
|
||||
it := msg.Data.NewIterator()
|
||||
for it.Next() {
|
||||
hash := it.Value().Bytes()
|
||||
p.lastReceivedHash = hash
|
||||
|
||||
if blockPool.HasCommonHash(hash) {
|
||||
foundCommonHash = true
|
||||
|
||||
break
|
||||
}
|
||||
|
||||
blockPool.AddHash(hash, p)
|
||||
}
|
||||
|
||||
if !foundCommonHash {
|
||||
//if !p.FetchHashes() {
|
||||
// p.doneFetchingHashes = true
|
||||
//}
|
||||
p.FetchHashes()
|
||||
} else {
|
||||
peerlogger.Infof("Found common hash (%x...)\n", p.lastReceivedHash[0:4])
|
||||
p.doneFetchingHashes = true
|
||||
}
|
||||
|
||||
case ethwire.MsgBlockTy:
|
||||
p.catchingUp = true
|
||||
|
||||
blockPool := p.ethereum.blockPool
|
||||
|
||||
it := msg.Data.NewIterator()
|
||||
for it.Next() {
|
||||
block := ethchain.NewBlockFromRlpValue(it.Value())
|
||||
blockPool.Add(block, p)
|
||||
|
||||
p.lastBlockReceived = time.Now()
|
||||
}
|
||||
case ethwire.MsgNewBlockTy:
|
||||
var (
|
||||
blockPool = p.ethereum.blockPool
|
||||
block = ethchain.NewBlockFromRlpValue(msg.Data.Get(0))
|
||||
td = msg.Data.Get(1).BigInt()
|
||||
)
|
||||
|
||||
if td.Cmp(blockPool.td) > 0 {
|
||||
p.ethereum.blockPool.AddNew(block, p)
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
p.Stop()
|
||||
}
|
||||
|
||||
func (self *Peer) FetchBlocks(hashes [][]byte) {
|
||||
if len(hashes) > 0 {
|
||||
peerlogger.Debugf("Fetching blocks (%d)\n", len(hashes))
|
||||
|
||||
self.QueueMessage(ethwire.NewMessage(ethwire.MsgGetBlocksTy, ethutil.ByteSliceToInterface(hashes)))
|
||||
}
|
||||
}
|
||||
|
||||
func (self *Peer) FetchHashes() bool {
|
||||
blockPool := self.ethereum.blockPool
|
||||
|
||||
return blockPool.FetchHashes(self)
|
||||
}
|
||||
|
||||
func (self *Peer) FetchingHashes() bool {
|
||||
return !self.doneFetchingHashes
|
||||
}
|
||||
|
||||
// General update method
|
||||
func (self *Peer) update() {
|
||||
serviceTimer := time.NewTicker(100 * time.Millisecond)
|
||||
|
||||
out:
|
||||
for {
|
||||
select {
|
||||
case <-serviceTimer.C:
|
||||
if self.IsCap("eth") {
|
||||
var (
|
||||
sinceBlock = time.Since(self.lastBlockReceived)
|
||||
)
|
||||
|
||||
if sinceBlock > 5*time.Second {
|
||||
self.catchingUp = false
|
||||
}
|
||||
}
|
||||
case <-self.quit:
|
||||
break out
|
||||
}
|
||||
}
|
||||
|
||||
serviceTimer.Stop()
|
||||
}
|
||||
|
||||
func (p *Peer) Start() {
|
||||
peerHost, peerPort, _ := net.SplitHostPort(p.conn.LocalAddr().String())
|
||||
servHost, servPort, _ := net.SplitHostPort(p.conn.RemoteAddr().String())
|
||||
|
||||
if p.inbound {
|
||||
p.host, p.port = packAddr(peerHost, peerPort)
|
||||
} else {
|
||||
p.host, p.port = packAddr(servHost, servPort)
|
||||
}
|
||||
|
||||
err := p.pushHandshake()
|
||||
if err != nil {
|
||||
peerlogger.Debugln("Peer can't send outbound version ack", err)
|
||||
|
||||
p.Stop()
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
go p.HandleOutbound()
|
||||
// Run the inbound handler in a new goroutine
|
||||
go p.HandleInbound()
|
||||
// Run the general update handler
|
||||
go p.update()
|
||||
|
||||
// Wait a few seconds for startup and then ask for an initial ping
|
||||
time.Sleep(2 * time.Second)
|
||||
p.writeMessage(ethwire.NewMessage(ethwire.MsgPingTy, ""))
|
||||
p.pingStartTime = time.Now()
|
||||
|
||||
}
|
||||
|
||||
func (p *Peer) Stop() {
|
||||
p.StopWithReason(DiscRequested)
|
||||
}
|
||||
|
||||
func (p *Peer) StopWithReason(reason DiscReason) {
|
||||
if atomic.AddInt32(&p.disconnect, 1) != 1 {
|
||||
return
|
||||
}
|
||||
|
||||
// Pre-emptively remove the peer; don't wait for reaping. We already know it's dead if we are here
|
||||
p.ethereum.RemovePeer(p)
|
||||
|
||||
close(p.quit)
|
||||
if atomic.LoadInt32(&p.connected) != 0 {
|
||||
p.writeMessage(ethwire.NewMessage(ethwire.MsgDiscTy, reason))
|
||||
p.conn.Close()
|
||||
}
|
||||
}
|
||||
|
||||
func (p *Peer) peersMessage() *ethwire.Msg {
|
||||
outPeers := make([]interface{}, len(p.ethereum.InOutPeers()))
|
||||
// Serialise each peer
|
||||
for i, peer := range p.ethereum.InOutPeers() {
|
||||
// Don't return localhost as valid peer
|
||||
if !net.ParseIP(peer.conn.RemoteAddr().String()).IsLoopback() {
|
||||
outPeers[i] = peer.RlpData()
|
||||
}
|
||||
}
|
||||
|
||||
// Return the message to the peer with the known list of connected clients
|
||||
return ethwire.NewMessage(ethwire.MsgPeersTy, outPeers)
|
||||
}
|
||||
|
||||
// Pushes the list of outbound peers to the client when requested
|
||||
func (p *Peer) pushPeers() {
|
||||
p.QueueMessage(p.peersMessage())
|
||||
}
|
||||
|
||||
func (self *Peer) pushStatus() {
|
||||
msg := ethwire.NewMessage(ethwire.MsgStatusTy, []interface{}{
|
||||
uint32(ProtocolVersion),
|
||||
uint32(NetVersion),
|
||||
self.ethereum.ChainManager().TD,
|
||||
self.ethereum.ChainManager().CurrentBlock.Hash(),
|
||||
self.ethereum.ChainManager().Genesis().Hash(),
|
||||
})
|
||||
|
||||
self.QueueMessage(msg)
|
||||
}
|
||||
|
||||
func (self *Peer) handleStatus(msg *ethwire.Msg) {
|
||||
c := msg.Data
|
||||
|
||||
var (
|
||||
//protoVersion = c.Get(0).Uint()
|
||||
netVersion = c.Get(1).Uint()
|
||||
td = c.Get(2).BigInt()
|
||||
bestHash = c.Get(3).Bytes()
|
||||
genesis = c.Get(4).Bytes()
|
||||
)
|
||||
|
||||
if bytes.Compare(self.ethereum.ChainManager().Genesis().Hash(), genesis) != 0 {
|
||||
ethlogger.Warnf("Invalid genisis hash %x. Disabling [eth]\n", genesis)
|
||||
return
|
||||
}
|
||||
|
||||
if netVersion != NetVersion {
|
||||
ethlogger.Warnf("Invalid network version %d. Disabling [eth]\n", netVersion)
|
||||
return
|
||||
}
|
||||
|
||||
/*
|
||||
if protoVersion != ProtocolVersion {
|
||||
ethlogger.Warnf("Invalid protocol version %d. Disabling [eth]\n", protoVersion)
|
||||
return
|
||||
}
|
||||
*/
|
||||
|
||||
// Get the td and last hash
|
||||
self.td = td
|
||||
self.bestHash = bestHash
|
||||
self.lastReceivedHash = bestHash
|
||||
|
||||
self.statusKnown = true
|
||||
|
||||
// Compare the total TD with the blockchain TD. If remote is higher
|
||||
// fetch hashes from highest TD node.
|
||||
self.FetchHashes()
|
||||
|
||||
ethlogger.Infof("Peer is [eth] capable. (TD = %v ~ %x)", self.td, self.bestHash)
|
||||
|
||||
}
|
||||
|
||||
func (p *Peer) pushHandshake() error {
|
||||
pubkey := p.ethereum.KeyManager().PublicKey()
|
||||
msg := ethwire.NewMessage(ethwire.MsgHandshakeTy, []interface{}{
|
||||
P2PVersion, []byte(p.version), []interface{}{[]interface{}{"eth", ProtocolVersion}}, p.port, pubkey[1:],
|
||||
})
|
||||
|
||||
p.QueueMessage(msg)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (p *Peer) handleHandshake(msg *ethwire.Msg) {
|
||||
c := msg.Data
|
||||
|
||||
var (
|
||||
p2pVersion = c.Get(0).Uint()
|
||||
clientId = c.Get(1).Str()
|
||||
caps = c.Get(2)
|
||||
port = c.Get(3).Uint()
|
||||
pub = c.Get(4).Bytes()
|
||||
)
|
||||
|
||||
// Check correctness of p2p protocol version
|
||||
if p2pVersion != P2PVersion {
|
||||
fmt.Println(p)
|
||||
peerlogger.Debugf("Invalid P2P version. Require protocol %d, received %d\n", P2PVersion, p2pVersion)
|
||||
p.Stop()
|
||||
return
|
||||
}
|
||||
|
||||
// Handle the pub key (validation, uniqueness)
|
||||
if len(pub) == 0 {
|
||||
peerlogger.Warnln("Pubkey required, not supplied in handshake.")
|
||||
p.Stop()
|
||||
return
|
||||
}
|
||||
|
||||
// Self connect detection
|
||||
pubkey := p.ethereum.KeyManager().PublicKey()
|
||||
if bytes.Compare(pubkey[1:], pub) == 0 {
|
||||
p.Stop()
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// Check for blacklisting
|
||||
for _, pk := range p.ethereum.blacklist {
|
||||
if bytes.Compare(pk, pub) == 0 {
|
||||
peerlogger.Debugf("Blacklisted peer tried to connect (%x...)\n", pubkey[0:4])
|
||||
p.StopWithReason(DiscBadPeer)
|
||||
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
usedPub := 0
|
||||
// This peer is already added to the peerlist so we expect to find a double pubkey at least once
|
||||
eachPeer(p.ethereum.Peers(), func(peer *Peer, e *list.Element) {
|
||||
if bytes.Compare(pub, peer.pubkey) == 0 {
|
||||
usedPub++
|
||||
}
|
||||
})
|
||||
|
||||
if usedPub > 0 {
|
||||
peerlogger.Debugf("Pubkey %x found more then once. Already connected to client.", p.pubkey)
|
||||
p.Stop()
|
||||
return
|
||||
}
|
||||
p.pubkey = pub
|
||||
|
||||
// If this is an inbound connection send an ack back
|
||||
if p.inbound {
|
||||
p.port = uint16(port)
|
||||
}
|
||||
|
||||
p.SetVersion(clientId)
|
||||
|
||||
p.versionKnown = true
|
||||
|
||||
p.ethereum.PushPeer(p)
|
||||
p.ethereum.eventMux.Post(PeerListEvent{p.ethereum.Peers()})
|
||||
|
||||
p.protocolCaps = caps
|
||||
|
||||
it := caps.NewIterator()
|
||||
var capsStrs []string
|
||||
for it.Next() {
|
||||
cap := it.Value().Get(0).Str()
|
||||
ver := it.Value().Get(1).Uint()
|
||||
switch cap {
|
||||
case "eth":
|
||||
if ver != ProtocolVersion {
|
||||
ethlogger.Warnf("Invalid protocol version %d. Disabling [eth]\n", ver)
|
||||
continue
|
||||
}
|
||||
p.pushStatus()
|
||||
}
|
||||
|
||||
capsStrs = append(capsStrs, cap)
|
||||
}
|
||||
|
||||
ethlogger.Infof("Added peer (%s) %d / %d (%v)\n", p.conn.RemoteAddr(), p.ethereum.Peers().Len(), p.ethereum.MaxPeers, capsStrs)
|
||||
|
||||
peerlogger.Debugln(p)
|
||||
}
|
||||
|
||||
func (self *Peer) IsCap(cap string) bool {
|
||||
capsIt := self.protocolCaps.NewIterator()
|
||||
for capsIt.Next() {
|
||||
if capsIt.Value().Str() == cap {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func (self *Peer) Caps() *ethutil.Value {
|
||||
return self.protocolCaps
|
||||
}
|
||||
|
||||
func (p *Peer) String() string {
|
||||
var strBoundType string
|
||||
if p.inbound {
|
||||
strBoundType = "inbound"
|
||||
} else {
|
||||
strBoundType = "outbound"
|
||||
}
|
||||
var strConnectType string
|
||||
if atomic.LoadInt32(&p.disconnect) == 0 {
|
||||
strConnectType = "connected"
|
||||
} else {
|
||||
strConnectType = "disconnected"
|
||||
}
|
||||
|
||||
return fmt.Sprintf("[%s] (%s) %v %s [%s]", strConnectType, strBoundType, p.conn.RemoteAddr(), p.version, p.caps)
|
||||
|
||||
}
|
||||
|
||||
func (p *Peer) RlpData() []interface{} {
|
||||
return []interface{}{p.host, p.port, p.pubkey}
|
||||
}
|
||||
|
||||
func packAddr(address, _port string) (host []byte, port uint16) {
|
||||
p, _ := strconv.Atoi(_port)
|
||||
port = uint16(p)
|
||||
|
||||
h := net.ParseIP(address)
|
||||
if ip := h.To4(); ip != nil {
|
||||
host = []byte(ip)
|
||||
} else {
|
||||
host = []byte(h)
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func unpackAddr(value *ethutil.Value, p uint64) string {
|
||||
host, _ := net.IP(value.Bytes()).MarshalText()
|
||||
prt := strconv.Itoa(int(p))
|
||||
|
||||
return net.JoinHostPort(string(host), prt)
|
||||
}
|
||||
Reference in New Issue
Block a user