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swarm.go
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swarm.go
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package peermgr
import (
"context"
"fmt"
"math"
"strconv"
"sync"
"time"
"github.com/Rican7/retry"
"github.com/Rican7/retry/strategy"
"github.com/ethereum/go-ethereum/event"
"github.com/libp2p/go-libp2p-core/connmgr"
"github.com/libp2p/go-libp2p-core/peer"
"github.com/libp2p/go-libp2p-core/protocol"
orderPeerMgr "github.com/meshplus/bitxhub-core/peer-mgr"
"github.com/meshplus/bitxhub-core/tss"
"github.com/meshplus/bitxhub-model/pb"
"github.com/meshplus/bitxhub/internal/ledger"
"github.com/meshplus/bitxhub/internal/repo"
libp2pcert "github.com/meshplus/go-libp2p-cert"
network "github.com/meshplus/go-lightp2p"
ma "github.com/multiformats/go-multiaddr"
"github.com/sirupsen/logrus"
)
const (
protocolID protocol.ID = "/B1txHu6/1.0.0" // magic protocol
)
var _ PeerManager = (*Swarm)(nil)
type Swarm struct {
repo *repo.Repo
localID uint64
p2p network.Network
logger logrus.FieldLogger
Tss tss.Tss
routers map[uint64]*pb.VpInfo // trace the vp nodes
multiAddrs map[uint64]*peer.AddrInfo
connectedPeers sync.Map
notifiee *notifiee
piers *Piers
gater connmgr.ConnectionGater
ledger *ledger.Ledger
orderMessageFeed event.Feed
tssMessageFeed event.Feed
tssSignResultFeed event.Feed
enablePing bool
pingTimeout time.Duration
pingC chan *repo.Ping
ctx context.Context
cancel context.CancelFunc
}
func New(repoConfig *repo.Repo, logger logrus.FieldLogger, ledger *ledger.Ledger) (*Swarm, error) {
ctx, cancel := context.WithCancel(context.Background())
swarm := &Swarm{repo: repoConfig, logger: logger, ledger: ledger, ctx: ctx, cancel: cancel}
if err := swarm.init(); err != nil {
panic(err)
}
return swarm, nil
}
func (swarm *Swarm) init() error {
var protocolIDs = []string{string(protocolID)}
// init peers with ips and hosts
routers := swarm.repo.NetworkConfig.GetVpInfos()
bootstrap := make([]string, 0)
for _, p := range routers {
if p.Id == swarm.repo.NetworkConfig.ID {
continue
}
addr := fmt.Sprintf("%s%s", p.Hosts[0], p.Pid)
bootstrap = append(bootstrap, addr)
}
multiAddrs := make(map[uint64]*peer.AddrInfo)
p2pPeers, _ := swarm.repo.NetworkConfig.GetNetworkPeers()
for id, node := range p2pPeers {
if id == swarm.repo.NetworkConfig.ID {
continue
}
multiAddrs[id] = node
}
tpt, err := libp2pcert.New(swarm.repo.Key.Libp2pPrivKey, swarm.repo.Certs)
if err != nil {
return fmt.Errorf("create transport: %w", err)
}
notifiee := newNotifiee(routers, swarm.logger)
gater := newConnectionGater(swarm.logger, swarm.ledger)
opts := []network.Option{
network.WithLocalAddr(swarm.repo.NetworkConfig.LocalAddr),
network.WithPrivateKey(swarm.repo.Key.Libp2pPrivKey),
network.WithProtocolIDs(protocolIDs),
network.WithLogger(swarm.logger),
// enable discovery
network.WithBootstrap(bootstrap),
network.WithNotify(notifiee),
network.WithConnectionGater(gater),
}
if swarm.repo.Config.Cert.Verify {
opts = append(opts,
network.WithTransportId(libp2pcert.ID),
network.WithTransport(tpt),
)
}
p2p, err := network.New(opts...)
if err != nil {
return fmt.Errorf("create p2p: %w", err)
}
swarm.localID = swarm.repo.NetworkConfig.ID
swarm.p2p = p2p
swarm.enablePing = swarm.repo.Config.Ping.Enable
swarm.pingTimeout = swarm.repo.Config.Ping.Duration
swarm.pingC = make(chan *repo.Ping)
swarm.routers = routers
swarm.multiAddrs = multiAddrs
if swarm.piers == nil {
swarm.piers = newPiers()
}
swarm.connectedPeers = sync.Map{}
swarm.notifiee = notifiee
swarm.gater = gater
return nil
}
func (swarm *Swarm) Start() error {
swarm.p2p.SetMessageHandler(swarm.handleMessage)
if err := swarm.p2p.Start(); err != nil {
return fmt.Errorf("start p2p failed: %w", err)
}
for id, addr := range swarm.multiAddrs {
go func(id uint64, addr *peer.AddrInfo, ctx context.Context) {
if err := retry.Retry(func(attempt uint) error {
select {
case <-swarm.ctx.Done():
return nil
default:
// for restart node, after updating the routing table, some nodes may not exist in routing table
routers := swarm.notifiee.getPeers()
if _, ok := routers[id]; !ok {
swarm.logger.Infof("Can't find node %d from routing table, stopping connect", id)
return nil
}
if err := swarm.p2p.Connect(*addr); err != nil {
swarm.logger.WithFields(logrus.Fields{
"node": id,
"error": err,
}).Error("Connect failed")
return fmt.Errorf("connect failed: %w", err)
}
swarm.logger.WithFields(logrus.Fields{
"node": id,
}).Info("Connect successfully")
swarm.connectedPeers.Store(id, addr)
return nil
}
},
strategy.Wait(1*time.Second),
); err != nil {
swarm.logger.Error(err)
}
}(id, addr, swarm.ctx)
}
go swarm.Ping()
return nil
}
func (swarm *Swarm) Stop() error {
swarm.cancel()
return swarm.p2p.Stop()
}
func (swarm *Swarm) Ping() {
if !swarm.enablePing {
swarm.pingTimeout = math.MaxInt64
}
ticker := time.NewTicker(swarm.pingTimeout)
for {
select {
case <-ticker.C:
fields := logrus.Fields{}
swarm.connectedPeers.Range(func(key, value interface{}) bool {
info := value.(*peer.AddrInfo)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
pingCh, err := swarm.p2p.Ping(ctx, info.ID.String())
if err != nil {
return true
}
select {
case res := <-pingCh:
fields[fmt.Sprintf("%d", key.(uint64))] = res.RTT
case <-time.After(time.Second * 5):
swarm.logger.Errorf("ping to node %d timeout", key.(uint64))
}
return true
})
swarm.logger.WithFields(fields).Info("ping time")
case pingConfig := <-swarm.pingC:
swarm.enablePing = pingConfig.Enable
swarm.pingTimeout = pingConfig.Duration
if !swarm.enablePing {
swarm.pingTimeout = math.MaxInt64
}
ticker.Stop()
ticker = time.NewTicker(swarm.pingTimeout)
case <-swarm.ctx.Done():
return
}
}
}
func (swarm *Swarm) AsyncSend(id orderPeerMgr.KeyType, msg *pb.Message) error {
var (
addr string
err error
)
if addr, err = swarm.findPeer(id.(uint64)); err != nil {
return fmt.Errorf("p2p send: %w", err)
}
data, err := msg.Marshal()
if err != nil {
return fmt.Errorf("marshal message error: %w", err)
}
return swarm.p2p.AsyncSend(addr, data)
}
func (swarm *Swarm) SendWithStream(s network.Stream, msg *pb.Message) error {
data, err := msg.Marshal()
if err != nil {
return fmt.Errorf("marshal message error: %w", err)
}
return s.AsyncSend(data)
}
func (swarm *Swarm) Send(id orderPeerMgr.KeyType, msg *pb.Message) (*pb.Message, error) {
var (
addr string
err error
)
if addr, err = swarm.findPeer(id.(uint64)); err != nil {
return nil, fmt.Errorf("check id: %w", err)
}
data, err := msg.Marshal()
if err != nil {
return nil, fmt.Errorf("marshal message error: %w", err)
}
ret, err := swarm.p2p.Send(addr, data)
if err != nil {
return nil, fmt.Errorf("sync send: %w", err)
}
m := &pb.Message{}
if err := m.Unmarshal(ret); err != nil {
return nil, fmt.Errorf("unmarshal message error: %w", err)
}
return m, nil
}
func (swarm *Swarm) Broadcast(msg *pb.Message) error {
addrs := make([]string, 0, len(swarm.routers))
for _, router := range swarm.routers {
if router.Id == swarm.localID {
continue
}
addrs = append(addrs, router.Pid)
}
// if we are in adding node but hasn't finished updateN, new node hash will be temporarily recorded
// in swarm.notifiee.newPeer.
if swarm.notifiee.newPeer != "" {
swarm.logger.Debugf("Broadcast to new peer %s", swarm.notifiee.newPeer)
addrs = append(addrs, swarm.notifiee.newPeer)
}
data, err := msg.Marshal()
if err != nil {
return fmt.Errorf("marshal message error: %w", err)
}
return swarm.p2p.Broadcast(addrs, data)
}
func (swarm *Swarm) Peers() map[string]*peer.AddrInfo {
//TODO: Too much redundant code, Optimize implementation logic.
addrInfos := make(map[string]*peer.AddrInfo)
for _, node := range swarm.notifiee.getPeers() {
addrInfo := &peer.AddrInfo{
ID: peer.ID(node.Pid),
}
addrInfos[strconv.FormatUint(node.Id, 10)] = addrInfo
}
return addrInfos
}
func (swarm *Swarm) OrderPeers() map[uint64]*pb.VpInfo {
return swarm.notifiee.getPeers()
}
func (swarm *Swarm) OtherPeers() map[uint64]*peer.AddrInfo {
addrInfos := make(map[uint64]*peer.AddrInfo)
for _, node := range swarm.notifiee.getPeers() {
if node.Id == swarm.localID {
continue
}
addrInfo := &peer.AddrInfo{
ID: peer.ID(node.Pid),
}
addrInfos[node.Id] = addrInfo
}
return addrInfos
}
func (swarm *Swarm) SubscribeOrderMessage(ch chan<- orderPeerMgr.OrderMessageEvent) event.Subscription {
return swarm.orderMessageFeed.Subscribe(ch)
}
func (swarm *Swarm) findPeer(id uint64) (string, error) {
if swarm.routers[id] != nil {
return swarm.routers[id].Pid, nil
}
newPeerAddr := swarm.notifiee.newPeer
// new node id should be len(swarm.peers)+1
if swarm.notifiee.newPeer != "" {
swarm.logger.Debugf("Unicast to new peer %s", swarm.notifiee.newPeer)
return newPeerAddr, nil
}
return "", fmt.Errorf("wrong id: %d", id)
}
func (swarm *Swarm) AddNode(newNodeID uint64, vpInfo *pb.VpInfo) {
if _, ok := swarm.routers[newNodeID]; ok {
swarm.logger.Warningf("VP[ID: %d, Pid: %s] has already exist in routing table", newNodeID, vpInfo.Pid)
return
}
swarm.logger.Infof("Add vp[ID: %d, Pid: %s] into routing table", newNodeID, vpInfo.Pid)
// 1. update routers and connectedPeers
swarm.routers[newNodeID] = vpInfo
addInfo, err := constructMultiaddr(vpInfo)
if err != nil {
swarm.logger.Errorf("Construct AddrInfo failed: %s", err.Error())
return
}
swarm.connectedPeers.Store(newNodeID, addInfo)
// 2. persist routers
if err := repo.RewriteNetworkConfig(swarm.repo.Config.RepoRoot, swarm.routers, false); err != nil {
swarm.logger.Errorf("Persist routing table failed, err: %s", err.Error())
return
}
// 3. update notifiee info
swarm.notifiee.setPeers(swarm.routers)
for id, p := range swarm.routers {
swarm.logger.Debugf("=====ID: %d, Addr: %v=====", id, p)
}
if swarm.notifiee.newPeer == vpInfo.Pid {
swarm.logger.Info("Clear notifiee newPeer info")
swarm.notifiee.newPeer = ""
} else if swarm.notifiee.newPeer != "" {
swarm.logger.Warningf("Received vpInfo %v, but it doesn't equal to notifiee newPeer %s", vpInfo, swarm.notifiee.newPeer)
}
}
func (swarm *Swarm) DelNode(delID uint64) {
var (
delNode *pb.VpInfo
ok bool
)
if delNode, ok = swarm.routers[delID]; !ok {
swarm.logger.Warningf("Can't find vp node %d from routing table ", delID)
return
}
swarm.logger.Infof("Delete node [ID: %d, peerInfo: %v] ", delID, delNode)
// 1. update routing table, multiAddrs and connectedPeers
delete(swarm.routers, delID)
delete(swarm.multiAddrs, delID)
swarm.connectedPeers.Delete(delID)
// 2. persist routers
if err := repo.RewriteNetworkConfig(swarm.repo.Config.RepoRoot, swarm.routers, false); err != nil {
swarm.logger.Errorf("Persist routing table failed, err: %s", err.Error())
return
}
for id, p := range swarm.routers {
swarm.logger.Debugf("=====ID: %d, Addr: %v=====", id, p)
}
// 3. update notifiee info
swarm.notifiee.setPeers(swarm.routers)
// 4. deleted node itself will exit the cluster
if delID == swarm.localID {
swarm.reset()
_ = swarm.p2p.Stop()
_ = swarm.Stop()
return
}
}
func (swarm *Swarm) UpdateRouter(vpInfos map[uint64]*pb.VpInfo, isNew bool) bool {
swarm.logger.Infof("Update router: %+v", vpInfos)
// 1. update routing table, multiAddrs and connectedPeers
oldRouters := swarm.routers
swarm.routers = vpInfos
for id, _ := range oldRouters {
if _, ok := vpInfos[id]; !ok {
delete(swarm.multiAddrs, id)
swarm.connectedPeers.Delete(id)
}
}
// 2. persist routers
if err := repo.RewriteNetworkConfig(swarm.repo.Config.RepoRoot, swarm.routers, isNew); err != nil {
swarm.logger.Errorf("Persist routing table failed, err: %s", err.Error())
return false
}
// 3. update notifiee info
swarm.notifiee.setPeers(vpInfos)
// 4. check if a restart node is exist in the routing table, if not, then exit the cluster
var isExist bool
for id, _ := range vpInfos {
if id == swarm.localID {
isExist = true
break
}
}
// deleted node itself will exit the cluster
if !isExist && !isNew {
swarm.reset()
_ = swarm.p2p.Stop()
_ = swarm.Stop()
return true
}
return false
}
func (swarm *Swarm) Disconnect(vpInfos map[uint64]*pb.VpInfo) {
for id, info := range vpInfos {
if err := swarm.p2p.Disconnect(info.Pid); err != nil {
swarm.logger.Errorf("Disconnect peer %s failed, err: %s", err.Error())
}
swarm.logger.Infof("Disconnect peer [ID: %d, Pid: %s]", id, info.Pid)
}
}
func (swarm *Swarm) CountConnectedPeers() uint64 {
var counter uint64
swarm.connectedPeers.Range(func(k, v interface{}) bool {
counter++
return true
})
return counter
}
func (swarm *Swarm) reset() {
swarm.routers = nil
swarm.multiAddrs = nil
swarm.connectedPeers = sync.Map{}
swarm.notifiee.setPeers(nil)
}
func constructMultiaddr(vpInfo *pb.VpInfo) (*peer.AddrInfo, error) {
addrs := make([]ma.Multiaddr, 0)
if len(vpInfo.Hosts) == 0 {
return nil, fmt.Errorf("no hosts found by node:%d", vpInfo.Id)
}
for _, host := range vpInfo.Hosts {
addr, err := ma.NewMultiaddr(fmt.Sprintf("%s%s", host, vpInfo.Pid))
if err != nil {
return nil, fmt.Errorf("new Multiaddr error:%w", err)
}
addrs = append(addrs, addr)
}
addrInfo, err := peer.AddrInfoFromP2pAddr(addrs[0])
if err != nil {
return nil, fmt.Errorf("convert multiaddr to addrinfo failed: %w", err)
}
return addrInfo, nil
}
func (swarm *Swarm) PierManager() PierManager {
return swarm
}
func (swarm *Swarm) ReConfig(config interface{}) error {
switch config.(type) {
case *repo.Config:
config := config.(*repo.Config)
swarm.pingC <- &config.Ping
case *repo.NetworkConfig:
config := config.(*repo.NetworkConfig)
if err := swarm.Stop(); err != nil {
return fmt.Errorf("stop swarm failed: %w", err)
}
swarm.repo.NetworkConfig = config
if err := swarm.init(); err != nil {
return fmt.Errorf("init swarm failed: %w", err)
}
if err := swarm.Start(); err != nil {
return fmt.Errorf("start swarm failed: %w", err)
}
}
return nil
}
func (swarm *Swarm) SubscribeTssMessage(ch chan<- *pb.Message) event.Subscription {
return swarm.tssMessageFeed.Subscribe(ch)
}
func (swarm *Swarm) SubscribeTssSignRes(ch chan<- *pb.Message) event.Subscription {
return swarm.tssSignResultFeed.Subscribe(ch)
}