libs5-go/service/default/p2p.go

694 lines
16 KiB
Go

package _default
import (
"bytes"
"context"
"errors"
"fmt"
"git.lumeweb.com/LumeWeb/libs5-go/ed25519"
"git.lumeweb.com/LumeWeb/libs5-go/encoding"
"git.lumeweb.com/LumeWeb/libs5-go/net"
"git.lumeweb.com/LumeWeb/libs5-go/protocol"
"git.lumeweb.com/LumeWeb/libs5-go/service"
"git.lumeweb.com/LumeWeb/libs5-go/structs"
"git.lumeweb.com/LumeWeb/libs5-go/types"
"git.lumeweb.com/LumeWeb/libs5-go/utils"
"github.com/vmihailenco/msgpack/v5"
bolt "go.etcd.io/bbolt"
"go.uber.org/zap"
"net/url"
"sort"
"sync"
"time"
)
var _ service.P2PService = (*P2PServiceDefault)(nil)
var (
errUnsupportedProtocol = errors.New("unsupported protocol")
errConnectionIdMissingNodeID = errors.New("connection id missing node id")
)
const nodeBucketName = "nodes"
type P2PServiceDefault struct {
nodeKeyPair *ed25519.KeyPairEd25519
localNodeID *encoding.NodeId
networkID string
nodesBucket *bolt.Bucket
inited bool
reconnectDelay structs.Map
peers structs.Map
peersPending structs.Map
selfConnectionUris []*url.URL
outgoingPeerBlocklist structs.Map
incomingPeerBlockList structs.Map
incomingIPBlocklist structs.Map
outgoingPeerFailures structs.Map
maxOutgoingPeerFailures uint
connections sync.WaitGroup
hashQueryRoutingTable structs.Map
service.ServiceBase
}
func NewP2P(params service.ServiceParams) *P2PServiceDefault {
uri, err := url.Parse(fmt.Sprintf("wss://%s:%d/s5/p2p", params.Config.HTTP.API.Domain, params.Config.HTTP.API.Port))
if err != nil {
params.Logger.Fatal("failed to parse HTTP API URL", zap.Error(err))
}
service := &P2PServiceDefault{
nodeKeyPair: params.Config.KeyPair,
networkID: params.Config.P2P.Network,
inited: false,
reconnectDelay: structs.NewMap(),
peers: structs.NewMap(),
peersPending: structs.NewMap(),
selfConnectionUris: []*url.URL{uri},
outgoingPeerBlocklist: structs.NewMap(),
incomingPeerBlockList: structs.NewMap(),
incomingIPBlocklist: structs.NewMap(),
outgoingPeerFailures: structs.NewMap(),
maxOutgoingPeerFailures: params.Config.P2P.MaxOutgoingPeerFailures,
hashQueryRoutingTable: structs.NewMap(),
ServiceBase: service.NewServiceBase(params.Logger, params.Config, params.Db),
}
return service
}
func (p *P2PServiceDefault) SelfConnectionUris() []*url.URL {
return p.selfConnectionUris
}
func (p *P2PServiceDefault) Peers() structs.Map {
return p.peers
}
func (p *P2PServiceDefault) Start(ctx context.Context) error {
config := p.Config()
if len(config.P2P.Peers.Initial) > 0 {
initialPeers := config.P2P.Peers.Initial
for _, peer := range initialPeers {
u, err := url.Parse(peer)
if err != nil {
return err
}
peer := peer
go func() {
err := p.ConnectToNode([]*url.URL{u}, false, nil)
if err != nil {
p.Logger().Error("failed to connect to initial peer", zap.Error(err), zap.String("peer", peer))
}
}()
}
}
return nil
}
func (p *P2PServiceDefault) Stop(ctx context.Context) error {
return nil
}
func (p *P2PServiceDefault) Init(ctx context.Context) error {
if p.inited {
return nil
}
p.localNodeID = encoding.NewNodeId(p.nodeKeyPair.PublicKey())
err := utils.CreateBucket(nodeBucketName, p.Db())
if err != nil {
return err
}
p.inited = true
return nil
}
func (p *P2PServiceDefault) ConnectToNode(connectionUris []*url.URL, retried bool, fromPeer net.Peer) error {
if !p.Services().IsStarted() {
if !p.Services().IsStarting() {
return nil
}
}
unsupported, _ := url.Parse("http://0.0.0.0")
unsupported.Scheme = "unsupported"
var connectionUri *url.URL
for _, uri := range connectionUris {
if uri.Scheme == "ws" || uri.Scheme == "wss" {
connectionUri = uri
break
}
}
if connectionUri == nil {
for _, uri := range connectionUris {
if uri.Scheme == "tcp" {
connectionUri = uri
break
}
}
}
if connectionUri == nil {
connectionUri = unsupported
}
if connectionUri.Scheme == "unsupported" {
return errUnsupportedProtocol
}
scheme := connectionUri.Scheme
if connectionUri.User == nil {
return errConnectionIdMissingNodeID
}
username := connectionUri.User.Username()
id, err := encoding.DecodeNodeId(username)
if err != nil {
return err
}
idString, err := id.ToString()
if err != nil {
return err
}
if p.peersPending.Contains(idString) || p.peers.Contains(idString) {
p.Logger().Debug("already connected", zap.String("node", connectionUri.String()))
return nil
}
if p.outgoingPeerBlocklist.Contains(idString) {
p.Logger().Debug("outgoing peer is on blocklist", zap.String("node", connectionUri.String()))
var fromPeerId string
if fromPeer != nil {
blocked := false
if fromPeer.Id() != nil {
fromPeerId, err = fromPeer.Id().ToString()
if err != nil {
return err
}
if !p.incomingPeerBlockList.Contains(fromPeerId) {
p.incomingPeerBlockList.Put(fromPeerId, true)
blocked = true
}
}
fromPeerIP := fromPeer.GetIP()
if !p.incomingIPBlocklist.Contains(fromPeerIP) {
p.incomingIPBlocklist.Put(fromPeerIP, true)
blocked = true
}
err = fromPeer.EndForAbuse()
if err != nil {
return err
}
if blocked {
p.Logger().Debug("blocking peer for sending peer on blocklist", zap.String("node", connectionUri.String()), zap.String("peer", fromPeerId), zap.String("ip", fromPeerIP))
}
}
return nil
}
reconnectDelay := p.reconnectDelay.GetUInt(idString)
if reconnectDelay == nil {
delay := uint(1)
reconnectDelay = &delay
}
if id.Equals(p.localNodeID) {
return nil
}
p.Logger().Debug("connect", zap.String("node", connectionUri.String()))
socket, err := net.CreateTransportSocket(scheme, connectionUri)
if err != nil {
if retried {
p.Logger().Error("failed to connect, too many retries", zap.String("node", connectionUri.String()), zap.Error(err))
counter := uint(0)
if p.outgoingPeerFailures.Contains(idString) {
tmp := *p.outgoingPeerFailures.GetUInt(idString)
counter = tmp
}
counter++
p.outgoingPeerFailures.PutUInt(idString, counter)
if counter >= p.maxOutgoingPeerFailures {
if fromPeer != nil {
blocked := false
var fromPeerId string
if fromPeer.Id() != nil {
fromPeerId, err = fromPeer.Id().ToString()
if err != nil {
return err
}
if !p.incomingPeerBlockList.Contains(fromPeerId) {
p.incomingPeerBlockList.Put(fromPeerId, true)
blocked = true
}
}
fromPeerIP := fromPeer.GetIP()
if !p.incomingIPBlocklist.Contains(fromPeerIP) {
p.incomingIPBlocklist.Put(fromPeerIP, true)
blocked = true
}
err = fromPeer.EndForAbuse()
if err != nil {
return err
}
if blocked {
p.Logger().Debug("blocking peer for sending peer on blocklist", zap.String("node", connectionUri.String()), zap.String("peer", fromPeerId), zap.String("ip", fromPeerIP))
}
}
p.outgoingPeerBlocklist.Put(idString, true)
p.Logger().Debug("blocking peer for too many failures", zap.String("node", connectionUri.String()))
}
return nil
}
retried = true
p.Logger().Error("failed to connect", zap.String("node", connectionUri.String()), zap.Error(err))
delay := p.reconnectDelay.GetUInt(idString)
if delay == nil {
tmp := uint(1)
delay = &tmp
}
delayDeref := *delay
p.reconnectDelay.PutUInt(idString, delayDeref*2)
time.Sleep(time.Duration(delayDeref) * time.Second)
return p.ConnectToNode(connectionUris, retried, fromPeer)
}
if p.outgoingPeerFailures.Contains(idString) {
p.outgoingPeerFailures.Remove(idString)
}
peer, err := net.CreateTransportPeer(scheme, &net.TransportPeerConfig{
Socket: socket,
Uris: []*url.URL{connectionUri},
})
if err != nil {
return err
}
peer.SetId(id)
p.Services().P2P().ConnectionTracker().Add(1)
peerId, err := peer.Id().ToString()
if err != nil {
return err
}
p.peersPending.Put(peerId, peer)
go func() {
err := p.OnNewPeer(peer, true)
if err != nil && !peer.Abuser() {
p.Logger().Error("peer error", zap.Error(err))
}
p.Services().P2P().ConnectionTracker().Done()
}()
return nil
}
func (p *P2PServiceDefault) OnNewPeer(peer net.Peer, verifyId bool) error {
var wg sync.WaitGroup
var pid string
if peer.Id() != nil {
pid, _ = peer.Id().ToString()
} else {
pid = "unknown"
}
pip := peer.GetIP()
if p.incomingIPBlocklist.Contains(pid) {
p.Logger().Error("peer is on identity blocklist", zap.String("peer", pid))
err := peer.EndForAbuse()
if err != nil {
return err
}
return nil
}
if p.incomingPeerBlockList.Contains(pip) {
p.Logger().Debug("peer is on ip blocklist", zap.String("peer", pid), zap.String("ip", pip))
err := peer.EndForAbuse()
if err != nil {
return err
}
return nil
}
p.Logger().Debug("OnNewPeer started", zap.String("peer", pid))
challenge := protocol.GenerateChallenge()
peer.SetChallenge(challenge)
wg.Add(1)
go func() {
defer wg.Done()
p.OnNewPeerListen(peer, verifyId)
}()
handshakeOpenMsg, err := msgpack.Marshal(protocol.NewHandshakeOpen(challenge, p.networkID))
if err != nil {
return err
}
err = peer.SendMessage(handshakeOpenMsg)
if err != nil {
return err
}
p.Logger().Debug("OnNewPeer sent handshake", zap.String("peer", pid))
p.Logger().Debug("OnNewPeer before Wait", zap.String("peer", pid))
wg.Wait() // Wait for OnNewPeerListen goroutine to finish
p.Logger().Debug("OnNewPeer ended", zap.String("peer", pid))
return nil
}
func (p *P2PServiceDefault) OnNewPeerListen(peer net.Peer, verifyId bool) {
onDone := net.CloseCallback(func() {
if peer.Id() != nil {
pid, err := peer.Id().ToString()
if err != nil {
p.Logger().Error("failed to get peer id", zap.Error(err))
return
}
// Handle closure of the connection
if p.peers.Contains(pid) {
p.peers.Remove(pid)
}
if p.peersPending.Contains(pid) {
p.peersPending.Remove(pid)
}
}
})
onError := net.ErrorCallback(func(args ...interface{}) {
if !peer.Abuser() {
p.Logger().Error("peer error", zap.Any("args", args))
}
})
peer.ListenForMessages(func(message []byte) error {
var reader protocol.IncomingMessageReader
err := msgpack.Unmarshal(message, &reader)
if err != nil {
p.Logger().Error("Error decoding basic message info", zap.Error(err))
return err
}
// Now, get the specific message handler based on the message kind
handler, ok := protocol.GetMessageType(reader.Kind)
if !ok {
p.Logger().Error("Unknown message type", zap.Int("type", reader.Kind))
return fmt.Errorf("unknown message type: %d", reader.Kind)
}
if handler.RequiresHandshake() && !peer.IsHandshakeDone() {
p.Logger().Debug("Peer is not handshake done, ignoring message", zap.Any("type", types.ProtocolMethodMap[types.ProtocolMethod(reader.Kind)]))
return nil
}
data := protocol.IncomingMessageData{
Original: message,
Data: reader.Data,
Ctx: context.Background(),
Peer: peer,
VerifyId: verifyId,
Config: p.Config(),
Logger: p.Logger(),
Mediator: NewMediator(service.ServiceParams{
Logger: p.Logger(),
Config: p.Config(),
Db: p.Db(),
}),
}
if mediator, ok := data.Mediator.(service.ServicesSetter); ok {
mediator.SetServices(p.Services())
} else {
p.Logger().Fatal("failed to cast mediator to service.Service")
}
dec := msgpack.NewDecoder(bytes.NewReader(reader.Data))
err = handler.DecodeMessage(dec, data)
if err != nil {
p.Logger().Error("Error decoding message", zap.Error(err))
return err
}
// Directly decode and handle the specific message type
if err = handler.HandleMessage(data); err != nil {
p.Logger().Error("Error handling message", zap.Error(err))
return err
}
return nil
}, net.ListenerOptions{
OnClose: &onDone,
OnError: &onError,
Logger: p.Logger(),
})
}
func (p *P2PServiceDefault) readNodeVotes(nodeId *encoding.NodeId) (service.NodeVotes, error) {
var value []byte
var found bool
err := p.Db().View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(nodeBucketName))
if b == nil {
return fmt.Errorf("Bucket %s not found", nodeBucketName)
}
value = b.Get(nodeId.Raw())
if value == nil {
return nil
}
found = true
return nil
})
if err != nil {
return nil, err
}
if !found {
return service.NewNodeVotes(), nil
}
var score service.NodeVotes
err = msgpack.Unmarshal(value, &score)
if err != nil {
return nil, err
}
return score, nil
}
func (p *P2PServiceDefault) saveNodeVotes(nodeId *encoding.NodeId, votes service.NodeVotes) error {
// Marshal the votes into data
data, err := msgpack.Marshal(votes)
if err != nil {
return err
}
// Use a transaction to save the data
err = p.Db().Update(func(tx *bolt.Tx) error {
// Get or create the bucket
b := tx.Bucket([]byte(nodeBucketName))
// Put the data into the bucket
return b.Put(nodeId.Raw(), data)
})
return err
}
func (p *P2PServiceDefault) GetNodeScore(nodeId *encoding.NodeId) (float64, error) {
if nodeId.Equals(p.localNodeID) {
return 1, nil
}
score, err := p.readNodeVotes(nodeId)
if err != nil {
return 0.5, err
}
return protocol.CalculateNodeScore(score.Good(), score.Bad()), nil
}
func (p *P2PServiceDefault) SortNodesByScore(nodes []*encoding.NodeId) ([]*encoding.NodeId, error) {
scores := make(map[encoding.NodeIdCode]float64)
var errOccurred error
for _, nodeId := range nodes {
score, err := p.GetNodeScore(nodeId)
if err != nil {
errOccurred = err
scores[nodeId.HashCode()] = 0 // You may choose a different default value for error cases
} else {
scores[nodeId.HashCode()] = score
}
}
sort.Slice(nodes, func(i, j int) bool {
return scores[nodes[i].HashCode()] > scores[nodes[j].HashCode()]
})
return nodes, errOccurred
}
func (p *P2PServiceDefault) SignMessageSimple(message []byte) ([]byte, error) {
signedMessage := protocol.NewSignedMessageRequest(message)
signedMessage.SetNodeId(p.localNodeID)
err := signedMessage.Sign(p.Config())
if err != nil {
return nil, err
}
result, err := msgpack.Marshal(signedMessage)
if err != nil {
return nil, err
}
return result, nil
}
func (p *P2PServiceDefault) AddPeer(peer net.Peer) error {
peerId, err := peer.Id().ToString()
if err != nil {
return err
}
p.peers.Put(peerId, peer)
p.reconnectDelay.PutUInt(peerId, 1)
if p.peersPending.Contains(peerId) {
p.peersPending.Remove(peerId)
}
return nil
}
func (p *P2PServiceDefault) SendPublicPeersToPeer(peer net.Peer, peersToSend []net.Peer) error {
announceRequest := protocol.NewAnnounceRequest(peer, peersToSend)
message, err := msgpack.Marshal(announceRequest)
if err != nil {
return err
}
signedMessage, err := p.SignMessageSimple(message)
if err != nil {
return err
}
err = peer.SendMessage(signedMessage)
return nil
}
func (p *P2PServiceDefault) SendHashRequest(hash *encoding.Multihash, kinds []types.StorageLocationType) error {
hashRequest := protocol.NewHashRequest(hash, kinds)
message, err := msgpack.Marshal(hashRequest)
if err != nil {
return err
}
for _, peer := range p.peers.Values() {
peerValue, ok := peer.(net.Peer)
if !ok {
p.Logger().Error("failed to cast peer to net.Peer")
continue
}
err = peerValue.SendMessage(message)
}
return nil
}
func (p *P2PServiceDefault) UpVote(nodeId *encoding.NodeId) error {
err := p.vote(nodeId, true)
if err != nil {
return err
}
return nil
}
func (p *P2PServiceDefault) DownVote(nodeId *encoding.NodeId) error {
err := p.vote(nodeId, false)
if err != nil {
return err
}
return nil
}
func (p *P2PServiceDefault) vote(nodeId *encoding.NodeId, upvote bool) error {
votes, err := p.readNodeVotes(nodeId)
if err != nil {
return err
}
if upvote {
votes.Upvote()
} else {
votes.Downvote()
}
err = p.saveNodeVotes(nodeId, votes)
if err != nil {
return err
}
return nil
}
func (p *P2PServiceDefault) NodeId() *encoding.NodeId {
return p.localNodeID
}
func (p *P2PServiceDefault) WaitOnConnectedPeers() {
p.connections.Wait()
}
func (p *P2PServiceDefault) ConnectionTracker() *sync.WaitGroup {
return &p.connections
}
func (p *P2PServiceDefault) NetworkId() string {
return p.Config().P2P.Network
}
func (n *P2PServiceDefault) HashQueryRoutingTable() structs.Map {
return n.hashQueryRoutingTable
}