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netMessenger.go
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netMessenger.go
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package libp2p
import (
"context"
"fmt"
"strings"
"sync"
"time"
logging "github.com/ipfs/go-log"
"github.com/libp2p/go-libp2p"
pubsub "github.com/libp2p/go-libp2p-pubsub"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/libp2p/go-libp2p/core/protocol"
quic "github.com/libp2p/go-libp2p/p2p/transport/quic"
"github.com/libp2p/go-libp2p/p2p/transport/tcp"
ws "github.com/libp2p/go-libp2p/p2p/transport/websocket"
webtransport "github.com/libp2p/go-libp2p/p2p/transport/webtransport"
"github.com/multiversx/mx-chain-communication-go/p2p"
"github.com/multiversx/mx-chain-communication-go/p2p/config"
"github.com/multiversx/mx-chain-communication-go/p2p/libp2p/connectionMonitor"
"github.com/multiversx/mx-chain-communication-go/p2p/libp2p/crypto"
discoveryFactory "github.com/multiversx/mx-chain-communication-go/p2p/libp2p/discovery/factory"
"github.com/multiversx/mx-chain-communication-go/p2p/libp2p/metrics"
metricsFactory "github.com/multiversx/mx-chain-communication-go/p2p/libp2p/metrics/factory"
"github.com/multiversx/mx-chain-communication-go/p2p/libp2p/networksharding/factory"
"github.com/multiversx/mx-chain-communication-go/p2p/libp2p/resourceLimiter"
"github.com/multiversx/mx-chain-core-go/core"
"github.com/multiversx/mx-chain-core-go/core/check"
"github.com/multiversx/mx-chain-core-go/core/throttler"
commonCrypto "github.com/multiversx/mx-chain-crypto-go"
logger "github.com/multiversx/mx-chain-logger-go"
)
const (
// DirectSendID represents the protocol ID for sending and receiving direct P2P messages
DirectSendID = protocol.ID("/erd/directsend/1.0.0")
refreshPeersOnTopic = time.Second * 3
ttlPeersOnTopic = time.Second * 10
ttlConnectionsWatcher = time.Hour * 2
pubsubTimeCacheDuration = 10 * time.Minute
acceptMessagesInAdvanceDuration = 20 * time.Second // we are accepting the messages with timestamp in the future only for this delta
pollWaitForConnectionsInterval = time.Second
broadcastGoRoutines = 1000
timeBetweenExternalLoggersCheck = time.Second * 20
minRangePortValue = 1025
noSignPolicy = pubsub.MessageSignaturePolicy(0) // should be used only in tests
msgBindError = "address already in use"
maxRetriesIfBindError = 10
baseErrorSuffix = "when creating a new network messenger"
pubSubMaxMessageSize = 1 << 21 // 2 MB
)
type messageSigningConfig bool
const (
withMessageSigning messageSigningConfig = true
withoutMessageSigning messageSigningConfig = false
)
var _ p2p.Messenger = (*networkMessenger)(nil)
var externalPackages = []string{"dht", "nat", "basichost", "pubsub"}
func init() {
pubsub.TimeCacheDuration = pubsubTimeCacheDuration
for _, external := range externalPackages {
_ = logger.GetOrCreate(fmt.Sprintf("external/%s", external))
}
}
type networkMessenger struct {
p2pSigner
p2p.MessageHandler
p2p.ConnectionsHandler
ctx context.Context
cancelFunc context.CancelFunc
p2pHost ConnectableHost
port int
printConnectionsWatcher p2p.ConnectionsWatcher
mutPeerTopicNotifiers sync.RWMutex
peerTopicNotifiers []p2p.PeerTopicNotifier
networkType p2p.NetworkType
log p2p.Logger
}
// ArgsNetworkMessenger defines the options used to create a p2p wrapper
type ArgsNetworkMessenger struct {
Marshaller p2p.Marshaller
P2pConfig config.P2PConfig
SyncTimer p2p.SyncTimer
PreferredPeersHolder p2p.PreferredPeersHolderHandler
PeersRatingHandler p2p.PeersRatingHandler
ConnectionWatcherType string
P2pPrivateKey commonCrypto.PrivateKey
P2pSingleSigner commonCrypto.SingleSigner
P2pKeyGenerator commonCrypto.KeyGenerator
NetworkType p2p.NetworkType
Logger p2p.Logger
}
// NewNetworkMessenger creates a libP2P messenger by opening a port on the current machine
func NewNetworkMessenger(args ArgsNetworkMessenger) (*networkMessenger, error) {
return newNetworkMessenger(args, withMessageSigning)
}
func newNetworkMessenger(args ArgsNetworkMessenger, messageSigning messageSigningConfig) (*networkMessenger, error) {
if check.IfNil(args.Marshaller) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilMarshaller, baseErrorSuffix)
}
if check.IfNil(args.SyncTimer) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilSyncTimer, baseErrorSuffix)
}
if check.IfNil(args.PreferredPeersHolder) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilPreferredPeersHolder, baseErrorSuffix)
}
if check.IfNil(args.PeersRatingHandler) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilPeersRatingHandler, baseErrorSuffix)
}
if check.IfNil(args.P2pPrivateKey) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilP2pPrivateKey, baseErrorSuffix)
}
if check.IfNil(args.P2pSingleSigner) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilP2pSingleSigner, baseErrorSuffix)
}
if check.IfNil(args.P2pKeyGenerator) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilP2pKeyGenerator, baseErrorSuffix)
}
if check.IfNil(args.Logger) {
return nil, fmt.Errorf("%w %s", p2p.ErrNilLogger, baseErrorSuffix)
}
setupExternalP2PLoggers()
p2pNode, err := constructNodeWithPortRetry(args)
if err != nil {
return nil, err
}
err = p2pNode.validateSeeders(args.P2pConfig.KadDhtPeerDiscovery.InitialPeerList)
if err != nil {
return nil, err
}
err = addComponentsToNode(args, p2pNode, messageSigning)
if err != nil {
p2pNode.log.LogIfError(p2pNode.p2pHost.Close())
return nil, err
}
return p2pNode, nil
}
func constructNode(
args ArgsNetworkMessenger,
) (*networkMessenger, error) {
port, err := getPort(args.P2pConfig.Node.Port, checkFreePort, args.Logger)
if err != nil {
return nil, err
}
args.Logger.Debug("connectionWatcherType", "type", args.ConnectionWatcherType)
connWatcher, err := metricsFactory.NewConnectionsWatcher(args.ConnectionWatcherType, ttlConnectionsWatcher, args.Logger)
if err != nil {
return nil, err
}
p2pPrivateKey, err := crypto.ConvertPrivateKeyToLibp2pPrivateKey(args.P2pPrivateKey)
if err != nil {
return nil, err
}
transportOptions, addresses, err := parseTransportOptions(args.P2pConfig.Node.Transports, port)
if err != nil {
return nil, err
}
resourceLimiterOption, err := resourceLimiter.CreateResourceLimiterOption(args.P2pConfig.Node.ResourceLimiter)
if err != nil {
return nil, err
}
options := []libp2p.Option{
libp2p.ListenAddrStrings(addresses...),
libp2p.Identity(p2pPrivateKey),
libp2p.DefaultMuxers,
libp2p.DefaultSecurity,
// we need to disable relay option in order to save the node's bandwidth as much as possible
libp2p.DisableRelay(),
libp2p.NATPortMap(),
resourceLimiterOption,
}
options = append(options, transportOptions...)
h, err := libp2p.New(options...)
if err != nil {
return nil, err
}
p2pSignerArgs := crypto.ArgsP2pSignerWrapper{
PrivateKey: args.P2pPrivateKey,
Signer: args.P2pSingleSigner,
KeyGen: args.P2pKeyGenerator,
P2PKeyConverter: crypto.NewP2PKeyConverter(),
}
p2pSignerInstance, err := crypto.NewP2PSignerWrapper(p2pSignerArgs)
if err != nil {
return nil, err
}
ctx, cancelFunc := context.WithCancel(context.Background())
p2pNode := &networkMessenger{
p2pSigner: p2pSignerInstance,
ctx: ctx,
cancelFunc: cancelFunc,
p2pHost: NewConnectableHost(h),
port: port,
printConnectionsWatcher: connWatcher,
peerTopicNotifiers: make([]p2p.PeerTopicNotifier, 0),
networkType: args.NetworkType,
log: args.Logger,
}
return p2pNode, nil
}
func parseTransportOptions(configs config.TransportConfig, port int) ([]libp2p.Option, []string, error) {
options := make([]libp2p.Option, 0)
addresses := make([]string, 0)
tcpAddress := configs.TCP.ListenAddress
if len(tcpAddress) > 0 {
if !strictCheckStringForIntMarkup(tcpAddress) {
return nil, nil, p2p.ErrInvalidTCPAddress
}
addresses = append(addresses, fmt.Sprintf(tcpAddress, port))
if configs.TCP.PreventPortReuse {
options = append(options, libp2p.Transport(tcp.NewTCPTransport, tcp.DisableReuseport()))
} else {
options = append(options, libp2p.Transport(tcp.NewTCPTransport))
}
}
quicAddress := configs.QUICAddress
if len(quicAddress) > 0 {
if !strictCheckStringForIntMarkup(quicAddress) {
return nil, nil, p2p.ErrInvalidQUICAddress
}
addresses = append(addresses, fmt.Sprintf(quicAddress, port))
options = append(options, libp2p.Transport(quic.NewTransport))
}
webSocketAddress := configs.WebSocketAddress
if len(webSocketAddress) > 0 {
if !strictCheckStringForIntMarkup(webSocketAddress) {
return nil, nil, p2p.ErrInvalidWSAddress
}
addresses = append(addresses, fmt.Sprintf(webSocketAddress, port))
options = append(options, libp2p.Transport(ws.New))
}
webTransportAddress := configs.WebTransportAddress
if len(webTransportAddress) > 0 {
if !strictCheckStringForIntMarkup(webTransportAddress) {
return nil, nil, p2p.ErrInvalidWebTransportAddress
}
addresses = append(addresses, fmt.Sprintf(webTransportAddress, port))
options = append(options, libp2p.Transport(webtransport.New))
}
if len(addresses) == 0 {
return nil, nil, p2p.ErrNoTransportsDefined
}
return options, addresses, nil
}
func strictCheckStringForIntMarkup(str string) bool {
intMarkup := "%d"
return strings.Count(str, intMarkup) == 1
}
func constructNodeWithPortRetry(
args ArgsNetworkMessenger,
) (*networkMessenger, error) {
var lastErr error
for i := 0; i < maxRetriesIfBindError; i++ {
p2pNode, err := constructNode(args)
if err == nil {
return p2pNode, nil
}
lastErr = err
if !strings.Contains(err.Error(), msgBindError) {
// not a bind error, return directly
return nil, err
}
args.Logger.Debug("bind error in network messenger", "retry number", i+1, "error", err)
}
return nil, lastErr
}
func setupExternalP2PLoggers() {
_ = logging.SetLogLevel("*", "PANIC")
for _, external := range externalPackages {
logLevel := logger.GetLoggerLogLevel("external/" + external)
if logLevel > logger.LogTrace {
continue
}
_ = logging.SetLogLevel(external, "DEBUG")
}
}
func addComponentsToNode(
args ArgsNetworkMessenger,
p2pNode *networkMessenger,
messageSigning messageSigningConfig,
) error {
var err error
preferredPeersHolder := args.PreferredPeersHolder
peersRatingHandler := args.PeersRatingHandler
marshaller := args.Marshaller
pubSub, err := p2pNode.createPubSub(messageSigning)
if err != nil {
return err
}
peersOnChannelInstance, err := newPeersOnChannel(
pubSub.ListPeers,
refreshPeersOnTopic,
ttlPeersOnTopic,
p2pNode.log)
if err != nil {
return err
}
sharder, err := p2pNode.createSharder(args)
if err != nil {
return err
}
peerDiscoverer, err := p2pNode.createDiscoverer(args.P2pConfig, sharder)
if err != nil {
return err
}
connMonitor, err := p2pNode.createConnectionMonitor(args.P2pConfig, sharder, preferredPeersHolder, peerDiscoverer)
if err != nil {
return err
}
ds, err := NewDirectSender(p2pNode.ctx, p2pNode.p2pHost, p2pNode, marshaller, p2pNode.log)
if err != nil {
return err
}
goRoutinesThrottler, err := throttler.NewNumGoRoutinesThrottler(broadcastGoRoutines)
if err != nil {
return err
}
oclb, err := NewOutgoingChannelLoadBalancer(p2pNode.log)
if err != nil {
return err
}
argsMessageHandler := ArgMessagesHandler{
PubSub: pubSub,
DirectSender: ds,
Throttler: goRoutinesThrottler,
OutgoingCLB: oclb,
Marshaller: marshaller,
ConnMonitor: connMonitor,
PeersRatingHandler: peersRatingHandler,
SyncTimer: args.SyncTimer,
PeerID: p2pNode.ID(),
Logger: p2pNode.log,
NetworkType: p2pNode.networkType,
}
p2pNode.MessageHandler, err = NewMessagesHandler(argsMessageHandler)
if err != nil {
return err
}
connectionsMetric := metrics.NewConnectionsMetric()
p2pNode.p2pHost.Network().Notify(connectionsMetric)
argsConnectionsHandler := ArgConnectionsHandler{
P2pHost: p2pNode.p2pHost,
PeersOnChannel: peersOnChannelInstance,
PeerShardResolver: &unknownPeerShardResolver{},
Sharder: sharder,
PreferredPeersHolder: preferredPeersHolder,
ConnMonitor: connMonitor,
PeerDiscoverer: peerDiscoverer,
PeerID: p2pNode.ID(),
ConnectionsMetric: connectionsMetric,
NetworkType: p2pNode.networkType,
Logger: p2pNode.log,
ProtocolID: args.P2pConfig.KadDhtPeerDiscovery.ProtocolID,
}
p2pNode.ConnectionsHandler, err = NewConnectionsHandler(argsConnectionsHandler)
if err != nil {
return err
}
p2pNode.printLogs()
return nil
}
func (netMes *networkMessenger) validateSeeders(seeders []string) error {
selfID := netMes.p2pHost.ID().String()
for _, seeder := range seeders {
if strings.Contains(seeder, selfID) {
return fmt.Errorf("%w, self ID %s is in the initial peer list", p2p.ErrInvalidConfig, selfID)
}
}
return nil
}
func (netMes *networkMessenger) createPubSub(messageSigning messageSigningConfig) (PubSub, error) {
optsPS := make([]pubsub.Option, 0)
if messageSigning == withoutMessageSigning {
netMes.log.Warn("signature verification is turned off in network messenger instance. NOT recommended in production environment")
optsPS = append(optsPS, pubsub.WithMessageSignaturePolicy(noSignPolicy))
}
optsPS = append(optsPS,
pubsub.WithPeerFilter(netMes.newPeerFound),
pubsub.WithMaxMessageSize(pubSubMaxMessageSize),
)
return pubsub.NewGossipSub(netMes.ctx, netMes.p2pHost, optsPS...)
}
func (netMes *networkMessenger) newPeerFound(pid peer.ID, topic string) bool {
netMes.mutPeerTopicNotifiers.RLock()
defer netMes.mutPeerTopicNotifiers.RUnlock()
for _, notifier := range netMes.peerTopicNotifiers {
notifier.NewPeerFound(core.PeerID(pid), topic)
}
return true
}
func (netMes *networkMessenger) createSharder(argsNetMes ArgsNetworkMessenger) (p2p.Sharder, error) {
args := factory.ArgsSharderFactory{
PeerShardResolver: &unknownPeerShardResolver{},
Pid: netMes.p2pHost.ID(),
P2pConfig: argsNetMes.P2pConfig,
PreferredPeersHolder: argsNetMes.PreferredPeersHolder,
Logger: netMes.log,
}
return factory.NewSharder(args)
}
func (netMes *networkMessenger) createDiscoverer(p2pConfig config.P2PConfig, sharder p2p.Sharder) (p2p.PeerDiscoverer, error) {
args := discoveryFactory.ArgsPeerDiscoverer{
Context: netMes.ctx,
Host: netMes.p2pHost,
Sharder: sharder,
P2pConfig: p2pConfig,
ConnectionsWatcher: netMes.printConnectionsWatcher,
NetworkType: netMes.networkType,
Logger: netMes.log,
}
return discoveryFactory.NewPeerDiscoverer(args)
}
func (netMes *networkMessenger) createConnectionMonitor(
p2pConfig config.P2PConfig,
sharderInstance p2p.Sharder,
preferredPeersHolder p2p.PreferredPeersHolderHandler,
peerDiscoverer p2p.PeerDiscoverer,
) (ConnectionMonitor, error) {
reconnecter, ok := peerDiscoverer.(p2p.Reconnecter)
if !ok {
return nil, fmt.Errorf("%w when converting peerDiscoverer to reconnecter interface", p2p.ErrWrongTypeAssertion)
}
sharder, ok := sharderInstance.(connectionMonitor.Sharder)
if !ok {
return nil, fmt.Errorf("%w in networkMessenger.createConnectionMonitor", p2p.ErrWrongTypeAssertions)
}
args := connectionMonitor.ArgsConnectionMonitorSimple{
Reconnecter: reconnecter,
ThresholdMinConnectedPeers: p2pConfig.Node.ThresholdMinConnectedPeers,
Sharder: sharder,
PreferredPeersHolder: preferredPeersHolder,
ConnectionsWatcher: netMes.printConnectionsWatcher,
Network: netMes.p2pHost.Network(),
Logger: netMes.log,
}
return connectionMonitor.NewLibp2pConnectionMonitorSimple(args)
}
func (netMes *networkMessenger) printLogs() {
addresses := make([]interface{}, 0)
for i, address := range netMes.p2pHost.Addrs() {
addresses = append(addresses, fmt.Sprintf("addr%d", i))
addresses = append(addresses, address.String()+"/p2p/"+netMes.ID().Pretty())
}
netMes.log.Info("listening on addresses", addresses...)
go netMes.checkExternalLoggers()
}
func (netMes *networkMessenger) checkExternalLoggers() {
for {
select {
case <-netMes.ctx.Done():
netMes.log.Debug("closing networkMessenger.checkExternalLoggers go routine")
return
case <-time.After(timeBetweenExternalLoggersCheck):
}
setupExternalP2PLoggers()
}
}
// Close closes the host, connections and streams
func (netMes *networkMessenger) Close() error {
netMes.log.Debug("closing network messenger's host...")
var err error
netMes.log.Debug("closing network messenger's messages handler...")
errMH := netMes.MessageHandler.Close()
if errMH != nil {
err = errMH
netMes.log.Warn("networkMessenger.Close",
"component", "messagesHandler",
"error", err)
}
netMes.log.Debug("closing network messenger's connections handler...")
errCH := netMes.ConnectionsHandler.Close()
if errCH != nil {
err = errCH
netMes.log.Warn("networkMessenger.Close",
"component", "connectionsHandler",
"error", err)
}
errHost := netMes.p2pHost.Close()
if errHost != nil {
err = errHost
netMes.log.Warn("networkMessenger.Close",
"component", "host",
"error", err)
}
netMes.log.Debug("closing network messenger's print connection watcher...")
errConnWatcher := netMes.printConnectionsWatcher.Close()
if errConnWatcher != nil {
err = errConnWatcher
netMes.log.Warn("networkMessenger.Close",
"component", "connectionsWatcher",
"error", err)
}
netMes.log.Debug("closing network messenger's components through the context...")
netMes.cancelFunc()
netMes.log.Debug("closing network messenger's peerstore...")
errPeerStore := netMes.p2pHost.Peerstore().Close()
if errPeerStore != nil {
err = errPeerStore
netMes.log.Warn("networkMessenger.Close",
"component", "peerstore",
"error", err)
}
if err == nil {
netMes.log.Info("network messenger closed successfully")
}
return err
}
// ID returns the messenger's ID
func (netMes *networkMessenger) ID() core.PeerID {
h := netMes.p2pHost
return core.PeerID(h.ID())
}
// Port returns the port that this network messenger is using
func (netMes *networkMessenger) Port() int {
return netMes.port
}
// AddPeerTopicNotifier will add a new peer topic notifier
func (netMes *networkMessenger) AddPeerTopicNotifier(notifier p2p.PeerTopicNotifier) error {
if check.IfNil(notifier) {
return p2p.ErrNilPeerTopicNotifier
}
netMes.mutPeerTopicNotifiers.Lock()
netMes.peerTopicNotifiers = append(netMes.peerTopicNotifiers, notifier)
netMes.mutPeerTopicNotifiers.Unlock()
netMes.log.Debug("networkMessenger.AddPeerTopicNotifier", "type", fmt.Sprintf("%T", notifier))
return nil
}
// IsInterfaceNil returns true if there is no value under the interface
func (netMes *networkMessenger) IsInterfaceNil() bool {
return netMes == nil
}