/
node.go
730 lines (630 loc) · 17.5 KB
/
node.go
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// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tendermint
import (
"encoding/hex"
"fmt"
"math"
"net"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/33cn/chain33/common/crypto"
ttypes "github.com/33cn/plugin/plugin/consensus/tendermint/types"
)
const (
numBufferedConnections = 10
maxNumPeers = 50
tryListenSeconds = 5
handshakeTimeout = 20 // * time.Second,
maxSendQueueSize = 1024
defaultSendTimeout = 60 * time.Second
//MaxMsgPacketPayloadSize define
MaxMsgPacketPayloadSize = 10 * 1024 * 1024
defaultDialTimeout = 3 * time.Second
dialRandomizerIntervalMilliseconds = 3000
// repeatedly try to reconnect for a few minutes
// ie. 5 * 20 = 100s
reconnectAttempts = 20
reconnectInterval = 5 * time.Second
// then move into exponential backoff mode for ~1day
// ie. 3**10 = 16hrs
reconnectBackOffAttempts = 10
reconnectBackOffBaseSeconds = 3
minReadBufferSize = 1024
minWriteBufferSize = 65536
)
// Parallel method
func Parallel(tasks ...func()) {
var wg sync.WaitGroup
wg.Add(len(tasks))
for _, task := range tasks {
go func(task func()) {
task()
wg.Done()
}(task)
}
wg.Wait()
}
// GenIDByPubKey method
func GenIDByPubKey(pubkey crypto.PubKey) ID {
//must add 3 bytes ahead to make compatibly
typeAddr := append([]byte{byte(0x01), byte(0x01), byte(0x20)}, pubkey.Bytes()[:32]...)
address := crypto.Ripemd160(typeAddr)
return ID(hex.EncodeToString(address))
}
// IP2IPPort struct
type IP2IPPort struct {
mutex sync.RWMutex
mapList map[string]string
}
// NewMutexMap method
func NewMutexMap() *IP2IPPort {
return &IP2IPPort{
mapList: make(map[string]string),
}
}
// Has method
func (ipp *IP2IPPort) Has(ip string) bool {
ipp.mutex.RLock()
defer ipp.mutex.RUnlock()
_, ok := ipp.mapList[ip]
return ok
}
// Set method
func (ipp *IP2IPPort) Set(ip string, ipport string) {
ipp.mutex.Lock()
defer ipp.mutex.Unlock()
ipp.mapList[ip] = ipport
}
// Delete method
func (ipp *IP2IPPort) Delete(ip string) {
ipp.mutex.Lock()
defer ipp.mutex.Unlock()
delete(ipp.mapList, ip)
}
// NodeInfo struct
type NodeInfo struct {
ID ID `json:"id"`
Network string `json:"network"`
Version string `json:"version"`
IP string `json:"ip,omitempty"`
}
// Node struct
type Node struct {
listener net.Listener
connections chan net.Conn
privKey crypto.PrivKey
Network string
Version string
ID ID
IP string //get ip from connect to ourself
localIPs map[string]net.IP
peerSet *PeerSet
dialing *IP2IPPort
reconnecting *IP2IPPort
seeds []string
protocol string
lAddr string
state *ConsensusState
broadcastChannel chan MsgInfo
unicastChannel chan MsgInfo
started uint32 // atomic
stopped uint32 // atomic
quit chan struct{}
}
// NewNode method
func NewNode(seeds []string, protocol string, lAddr string, privKey crypto.PrivKey, network string, version string, state *ConsensusState) *Node {
node := &Node{
peerSet: NewPeerSet(),
seeds: seeds,
protocol: protocol,
lAddr: lAddr,
connections: make(chan net.Conn, numBufferedConnections),
privKey: privKey,
Network: network,
Version: version,
ID: GenIDByPubKey(privKey.PubKey()),
dialing: NewMutexMap(),
reconnecting: NewMutexMap(),
broadcastChannel: make(chan MsgInfo, maxSendQueueSize),
unicastChannel: make(chan MsgInfo, maxSendQueueSize),
state: state,
localIPs: make(map[string]net.IP),
}
state.SetOurID(node.ID)
state.SetBroadcastChannel(node.broadcastChannel)
state.SetUnicastChannel(node.unicastChannel)
localIPs := getNaiveExternalAddress(true)
if len(localIPs) > 0 {
for _, item := range localIPs {
node.localIPs[item.String()] = item
}
}
return node
}
// Start node
func (node *Node) Start() {
if atomic.CompareAndSwapUint32(&node.started, 0, 1) {
// Create listener
var listener net.Listener
var err error
for i := 0; i < tryListenSeconds; i++ {
listener, err = net.Listen(node.protocol, node.lAddr)
if err == nil {
break
} else if i < tryListenSeconds-1 {
time.Sleep(time.Second)
}
}
if err != nil {
panic(err)
}
node.listener = listener
// Actual listener local IP & port
listenerIP, listenerPort := splitHostPort(listener.Addr().String())
tendermintlog.Info("Local listener", "ip", listenerIP, "port", listenerPort)
go node.listenRoutine()
for i := 0; i < len(node.seeds); i++ {
go func(i int) {
addr := node.seeds[i]
ip, _ := splitHostPort(addr)
_, ok := node.localIPs[ip]
if ok {
tendermintlog.Info("find our ip ", "ourIP", ip)
node.IP = ip
return
}
randomSleep(0)
err := node.DialPeerWithAddress(addr)
if err != nil {
tendermintlog.Debug("Error dialing peer", "err", err)
}
}(i)
}
go node.StartConsensusRoutine()
go node.BroadcastRoutine()
go node.UnicastRoutine()
}
}
// DialPeerWithAddress ...
func (node *Node) DialPeerWithAddress(addr string) error {
ip, _ := splitHostPort(addr)
node.dialing.Set(ip, addr)
defer node.dialing.Delete(ip)
return node.addOutboundPeerWithConfig(addr)
}
func (node *Node) addOutboundPeerWithConfig(addr string) error {
tendermintlog.Info("Dialing peer", "address", addr)
peerConn, err := newOutboundPeerConn(addr, node.privKey, node.StopPeerForError, node.state)
if err != nil {
go node.reconnectToPeer(addr)
return err
}
if err := node.addPeer(peerConn); err != nil {
peerConn.CloseConn()
return err
}
return nil
}
// Stop ...
func (node *Node) Stop() {
atomic.CompareAndSwapUint32(&node.stopped, 0, 1)
err := node.listener.Close()
if err != nil {
tendermintlog.Error("Close listener failed", "err", err)
}
if node.quit != nil {
close(node.quit)
}
// Stop peers
for _, peer := range node.peerSet.List() {
peer.Stop()
node.peerSet.Remove(peer)
}
//stop consensus
node.state.Stop()
}
// IsRunning ...
func (node *Node) IsRunning() bool {
return atomic.LoadUint32(&node.started) == 1 && atomic.LoadUint32(&node.stopped) == 0
}
func (node *Node) listenRoutine() {
for {
conn, err := node.listener.Accept()
if !node.IsRunning() {
break // Go to cleanup
}
// listener wasn't stopped,
// yet we encountered an error.
if err != nil {
panic(err)
}
go node.connectComming(conn)
}
// Cleanup
close(node.connections)
for range node.connections {
// Drain
}
}
// StartConsensusRoutine if peers reached the threshold start consensus routine
func (node *Node) StartConsensusRoutine() {
for {
//TODO:the peer count need be optimized
if node.peerSet.Size() >= 0 {
node.state.Start()
break
}
time.Sleep(1 * time.Second)
}
}
// BroadcastRoutine receive to broadcast
func (node *Node) BroadcastRoutine() {
for {
msg, ok := <-node.broadcastChannel
if !ok {
tendermintlog.Info("broadcastChannel closed")
return
}
node.Broadcast(msg)
}
}
// UnicastRoutine receive to broadcast
func (node *Node) UnicastRoutine() {
for {
msg, ok := <-node.unicastChannel
if !ok {
tendermintlog.Info("unicastChannel closed")
return
}
for _, peer := range node.peerSet.List() {
if peer.ID() == msg.PeerID {
peerIP, _ := peer.RemoteIP()
msg.PeerIP = peerIP.String()
success := peer.Send(msg)
if !success {
tendermintlog.Error("send failure in UnicastRoutine")
}
break
}
}
}
}
func (node *Node) connectComming(inConn net.Conn) {
maxPeers := maxNumPeers
if maxPeers <= node.peerSet.Size() {
tendermintlog.Debug("Ignoring inbound connection: already have enough peers", "address", inConn.RemoteAddr().String(), "numPeers", node.peerSet.Size(), "max", maxPeers)
return
}
// New inbound connection!
err := node.addInboundPeer(inConn)
if err != nil {
tendermintlog.Info("Ignoring inbound connection: error while adding peer", "address", inConn.RemoteAddr().String(), "err", err)
return
}
}
func (node *Node) stopAndRemovePeer(peer Peer, reason interface{}) {
node.peerSet.Remove(peer)
peer.Stop()
}
// StopPeerForError called if error occurred
func (node *Node) StopPeerForError(peer Peer, reason interface{}) {
tendermintlog.Error("Stopping peer for error", "peer", peer, "err", reason)
addr, err := peer.RemoteAddr()
node.stopAndRemovePeer(peer, reason)
if peer.IsPersistent() {
if err == nil && addr != nil {
go node.reconnectToPeer(addr.String())
}
}
}
func (node *Node) addInboundPeer(conn net.Conn) error {
peerConn, err := newInboundPeerConn(conn, node.privKey, node.StopPeerForError, node.state)
if err != nil {
if er := conn.Close(); er != nil {
tendermintlog.Error("addInboundPeer close conn failed", "er", er)
}
return err
}
if err = node.addPeer(peerConn); err != nil {
peerConn.CloseConn()
return err
}
return nil
}
// addPeer checks the given peer's validity, performs a handshake, and adds the
// peer to the switch and to all registered reactors.
// NOTE: This performs a blocking handshake before the peer is added.
// NOTE: If error is returned, caller is responsible for calling peer.CloseConn()
func (node *Node) addPeer(pc *peerConn) error {
addr := pc.conn.RemoteAddr()
if err := node.FilterConnByAddr(addr); err != nil {
return err
}
remoteIP, rErr := pc.RemoteIP()
nodeinfo := NodeInfo{
ID: node.ID,
Network: node.Network,
Version: node.Version,
IP: node.IP,
}
// Exchange NodeInfo on the conn
peerNodeInfo, err := pc.HandshakeTimeout(nodeinfo, handshakeTimeout*time.Second)
if err != nil {
return err
}
peerID := peerNodeInfo.ID
// ensure connection key matches self reported key
connID := pc.ID()
if peerID != connID {
return fmt.Errorf(
"nodeInfo.ID() (%v) doesn't match conn.ID() (%v)",
peerID,
connID,
)
}
// Avoid self
if node.ID == peerID {
return fmt.Errorf("Connect to self: %v", addr)
}
// Avoid duplicate
if node.peerSet.Has(peerID) {
return fmt.Errorf("Duplicate peer ID %v", peerID)
}
// Check for duplicate connection or peer info IP.
if rErr == nil && node.peerSet.HasIP(remoteIP) {
return fmt.Errorf("Duplicate peer IP %v", remoteIP)
} else if rErr != nil {
return fmt.Errorf("get remote ip failed:%v", rErr)
}
// Check version, chain id
if err := node.CompatibleWith(peerNodeInfo); err != nil {
return err
}
tendermintlog.Info("Successful handshake with peer", "peerNodeInfo", peerNodeInfo)
// All good. Start peer
if node.IsRunning() {
pc.SetTransferChannel(node.state.peerMsgQueue)
if err = node.startInitPeer(pc); err != nil {
return err
}
}
// Add the peer to .peers.
// We start it first so that a peer in the list is safe to Stop.
// It should not err since we already checked peers.Has().
if err := node.peerSet.Add(pc); err != nil {
return err
}
tendermintlog.Info("Added peer", "peer", pc.ip)
stateMsg := MsgInfo{TypeID: ttypes.NewRoundStepID, Msg: node.state.RoundStateMessage(), PeerID: pc.id, PeerIP: pc.ip.String()}
pc.Send(stateMsg)
tendermintlog.Info("Send state msg", "msg", stateMsg, "ourIP", node.IP, "ourID", node.ID)
return nil
}
// Broadcast to peers in set
func (node *Node) Broadcast(msg MsgInfo) chan bool {
successChan := make(chan bool, len(node.peerSet.List()))
tendermintlog.Debug("Broadcast", "msgtype", msg.TypeID)
var wg sync.WaitGroup
for _, peer := range node.peerSet.List() {
wg.Add(1)
go func(peer Peer) {
defer wg.Done()
msg.PeerID = peer.ID()
peerIP, _ := peer.RemoteIP()
msg.PeerIP = peerIP.String()
success := peer.Send(msg)
successChan <- success
}(peer)
}
go func() {
wg.Wait()
close(successChan)
}()
return successChan
}
func (node *Node) startInitPeer(peer *peerConn) error {
err := peer.Start() // spawn send/recv routines
if err != nil {
// Should never happen
tendermintlog.Error("Error starting peer", "peer", peer, "err", err)
return err
}
return nil
}
// FilterConnByAddr TODO:can make fileter by addr
func (node *Node) FilterConnByAddr(addr net.Addr) error {
return nil
}
// CompatibleWith one node by nodeInfo
func (node *Node) CompatibleWith(other NodeInfo) error {
iMajor, iMinor, _, iErr := splitVersion(node.Version)
oMajor, oMinor, _, oErr := splitVersion(other.Version)
// if our own version number is not formatted right, we messed up
if iErr != nil {
return iErr
}
// version number must be formatted correctly ("x.x.x")
if oErr != nil {
return oErr
}
// major version must match
if iMajor != oMajor {
return fmt.Errorf("Peer is on a different major version. Got %v, expected %v", oMajor, iMajor)
}
// minor version can differ
if iMinor != oMinor {
// ok
}
// nodes must be on the same network
if node.Network != other.Network {
return fmt.Errorf("Peer is on a different network. Got %v, expected %v", other.Network, node.Network)
}
return nil
}
func (node *Node) reconnectToPeer(addr string) {
host, _ := splitHostPort(addr)
if node.reconnecting.Has(host) {
return
}
node.reconnecting.Set(host, addr)
defer node.reconnecting.Delete(host)
start := time.Now()
tendermintlog.Info("Reconnecting to peer", "addr", addr)
for i := 0; i < reconnectAttempts; i++ {
if !node.IsRunning() {
return
}
ips, err := net.LookupIP(host)
if err != nil {
tendermintlog.Info("LookupIP failed", "host", host)
continue
}
if node.peerSet.HasIP(ips[0]) {
tendermintlog.Info("Reconnecting to peer exit, already connect to the peer", "peer", host)
return
}
err = node.DialPeerWithAddress(addr)
if err == nil {
return // success
}
tendermintlog.Info("Error reconnecting to peer. Trying again", "tries", i, "err", err, "addr", addr)
// sleep a set amount
randomSleep(reconnectInterval)
continue
}
tendermintlog.Error("Failed to reconnect to peer. Beginning exponential backoff",
"addr", addr, "elapsed", time.Since(start))
for i := 0; i < reconnectBackOffAttempts; i++ {
if !node.IsRunning() {
return
}
// sleep an exponentially increasing amount
sleepIntervalSeconds := math.Pow(reconnectBackOffBaseSeconds, float64(i))
time.Sleep(time.Duration(sleepIntervalSeconds) * time.Second)
err := node.DialPeerWithAddress(addr)
if err == nil {
return // success
}
tendermintlog.Info("Error reconnecting to peer. Trying again", "tries", i, "err", err, "addr", addr)
}
tendermintlog.Error("Failed to reconnect to peer. Giving up", "addr", addr, "elapsed", time.Since(start))
}
//---------------------------------------------------------------------
func randomSleep(interval time.Duration) {
r := time.Duration(ttypes.RandInt63n(dialRandomizerIntervalMilliseconds)) * time.Millisecond
time.Sleep(r + interval)
}
func isIpv6(ip net.IP) bool {
v4 := ip.To4()
if v4 != nil {
return false
}
ipString := ip.String()
// Extra check just to be sure it's IPv6
return (strings.Contains(ipString, ":") && !strings.Contains(ipString, "."))
}
func getNaiveExternalAddress(defaultToIPv4 bool) []net.IP {
var ips []net.IP
addrs, err := net.InterfaceAddrs()
if err != nil {
panic(fmt.Sprintf("Could not fetch interface addresses: %v", err))
}
for _, a := range addrs {
ipnet, ok := a.(*net.IPNet)
if !ok {
continue
}
if defaultToIPv4 || !isIpv6(ipnet.IP) {
v4 := ipnet.IP.To4()
if v4 == nil || v4[0] == 127 {
// loopback
continue
}
} else if ipnet.IP.IsLoopback() {
// IPv6, check for loopback
continue
}
ips = append(ips, ipnet.IP)
}
return ips
}
func splitVersion(version string) (string, string, string, error) {
spl := strings.Split(version, ".")
if len(spl) != 3 {
return "", "", "", fmt.Errorf("Invalid version format %v", version)
}
return spl[0], spl[1], spl[2], nil
}
func splitHostPort(addr string) (host string, port int) {
host, portStr, err := net.SplitHostPort(addr)
if err != nil {
panic(err)
}
port, err = strconv.Atoi(portStr)
if err != nil {
panic(err)
}
return host, port
}
func dial(addr string) (net.Conn, error) {
conn, err := net.DialTimeout("tcp", addr, defaultDialTimeout)
if err != nil {
return nil, err
}
return conn, nil
}
func newOutboundPeerConn(addr string, ourNodePrivKey crypto.PrivKey, onPeerError func(Peer, interface{}), state *ConsensusState) (*peerConn, error) {
conn, err := dial(addr)
if err != nil {
return &peerConn{}, fmt.Errorf("newOutboundPeerConn dial fail:%v", err)
}
pc, err := newPeerConn(conn, true, true, ourNodePrivKey, onPeerError, state)
if err != nil {
if cerr := conn.Close(); cerr != nil {
return &peerConn{}, fmt.Errorf("newPeerConn failed:%v, connection close failed:%v", err, cerr)
}
return &peerConn{}, err
}
return pc, nil
}
func newInboundPeerConn(
conn net.Conn,
ourNodePrivKey crypto.PrivKey,
onPeerError func(Peer, interface{}),
state *ConsensusState,
) (*peerConn, error) {
// TODO: issue PoW challenge
return newPeerConn(conn, false, false, ourNodePrivKey, onPeerError, state)
}
func newPeerConn(
rawConn net.Conn,
outbound, persistent bool,
ourNodePrivKey crypto.PrivKey,
onPeerError func(Peer, interface{}),
state *ConsensusState,
) (pc *peerConn, err error) {
conn := rawConn
// Set deadline for secret handshake
dl := time.Now().Add(handshakeTimeout * time.Second)
if err := conn.SetDeadline(dl); err != nil {
return pc, fmt.Errorf("Error setting deadline while encrypting connection:%v", err)
}
// Encrypt connection
conn, err = MakeSecretConnection(conn, ourNodePrivKey)
if err != nil {
return pc, fmt.Errorf("MakeSecretConnection fail:%v", err)
}
// Only the information we already have
return &peerConn{
outbound: outbound,
persistent: persistent,
conn: conn,
onPeerError: onPeerError,
myState: state,
}, nil
}