libs5-go/service/p2p.go

384 lines
7.9 KiB
Go

package service
import (
"errors"
"fmt"
"git.lumeweb.com/LumeWeb/libs5-go/ed25519"
"git.lumeweb.com/LumeWeb/libs5-go/encoding"
"git.lumeweb.com/LumeWeb/libs5-go/interfaces"
"git.lumeweb.com/LumeWeb/libs5-go/net"
"git.lumeweb.com/LumeWeb/libs5-go/protocol"
"git.lumeweb.com/LumeWeb/libs5-go/protocol/base"
"git.lumeweb.com/LumeWeb/libs5-go/protocol/signed"
"git.lumeweb.com/LumeWeb/libs5-go/structs"
"git.lumeweb.com/LumeWeb/libs5-go/utils"
"github.com/vmihailenco/msgpack/v5"
bolt "go.etcd.io/bbolt"
"go.uber.org/zap"
"net/url"
"reflect"
"sort"
"sync"
"time"
)
var _ interfaces.P2PService = (*P2PImpl)(nil)
var _ interfaces.NodeVotes = (*NodeVotesImpl)(nil)
var (
errUnsupportedProtocol = errors.New("unsupported protocol")
errConnectionIdMissingNodeID = errors.New("connection id missing node id")
)
const nodeBucketName = "nodes"
type P2PImpl struct {
logger *zap.Logger
nodeKeyPair *ed25519.KeyPairEd25519
localNodeID *encoding.NodeId
networkID string
nodesBucket *bolt.Bucket
node interfaces.Node
inited bool
reconnectDelay structs.Map
peers structs.Map
}
func NewP2P(node interfaces.Node) *P2PImpl {
service := &P2PImpl{
logger: node.Logger(),
nodeKeyPair: node.Config().KeyPair,
networkID: node.Config().P2P.Network,
node: node,
inited: false,
reconnectDelay: structs.NewMap(),
peers: structs.NewMap(),
}
return service
}
func (p *P2PImpl) Node() interfaces.Node {
return p.node
}
func (p *P2PImpl) Peers() structs.Map {
return p.peers
}
func (p *P2PImpl) Start() error {
config := p.Node().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
}
err = p.ConnectToNode([]*url.URL{u}, false)
if err != nil {
return err
}
}
}
return nil
}
func (p *P2PImpl) Stop() error {
panic("implement me")
}
func (p *P2PImpl) Init() error {
if p.inited {
return nil
}
p.localNodeID = encoding.NewNodeId(p.nodeKeyPair.PublicKey())
err := utils.CreateBucket(nodeBucketName, p.Node().Db(), func(bucket *bolt.Bucket) {
p.nodesBucket = bucket
})
if err != nil {
return err
}
p.inited = true
return nil
}
func (p *P2PImpl) ConnectToNode(connectionUris []*url.URL, retried bool) error {
if !p.Node().IsStarted() {
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
}
reconnectDelay := p.reconnectDelay.GetInt(idString)
if reconnectDelay == nil {
delay := 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))
return nil
}
retried = true
p.logger.Error("failed to connect", zap.String("node", connectionUri.String()), zap.Error(err))
delay := p.reconnectDelay.GetInt(idString)
if delay == nil {
tmp := 1
delay = &tmp
}
delayDeref := *delay
p.reconnectDelay.PutInt(idString, delayDeref*2)
time.Sleep(time.Duration(delayDeref) * time.Second)
return p.ConnectToNode(connectionUris, retried)
}
peer, err := net.CreateTransportPeer(scheme, &net.TransportPeerConfig{
Socket: socket,
Uris: []*url.URL{connectionUri},
})
if err != nil {
return err
}
peer.SetId(id)
return p.OnNewPeer(peer, true)
}
func (p *P2PImpl) OnNewPeer(peer net.Peer, verifyId bool) error {
var wg sync.WaitGroup
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
}
wg.Wait() // Wait for OnNewPeerListen goroutine to finish
return nil
}
func (p *P2PImpl) OnNewPeerListen(peer net.Peer, verifyId bool) {
onDone := net.CloseCallback(func() {
peerId, 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(peerId) {
p.peers.Remove(peerId)
}
})
onError := net.ErrorCallback(func(args ...interface{}) {
p.logger.Error("peer error", zap.Any("args", args))
})
peer.ListenForMessages(func(message []byte) error {
imsg := base.NewIncomingMessageUnknown()
err := msgpack.Unmarshal(message, imsg)
if err != nil {
return err
}
handler, ok := protocol.GetMessageType(imsg.GetKind())
if ok {
imsg.SetOriginal(message)
handler.SetIncomingMessage(imsg)
handler.SetSelf(handler)
fmt.Println(reflect.TypeOf(handler))
err := msgpack.Unmarshal(imsg.Data(), handler)
if err != nil {
return err
}
err = handler.HandleMessage(p.node, peer, verifyId)
if err != nil {
return err
}
}
return nil
}, net.ListenerOptions{
OnClose: &onDone,
OnError: &onError,
Logger: p.logger,
})
}
func (p *P2PImpl) ReadNodeScore(nodeId *encoding.NodeId) (interfaces.NodeVotes, error) {
node := p.nodesBucket.Get(nodeId.Raw())
if node == nil {
return NewNodeVotes(), nil
}
var score interfaces.NodeVotes
err := msgpack.Unmarshal(node, &score)
if err != nil {
}
return score, nil
}
func (p *P2PImpl) GetNodeScore(nodeId *encoding.NodeId) (float64, error) {
if nodeId.Equals(p.localNodeID) {
return 1, nil
}
score, err := p.ReadNodeScore(nodeId)
if err != nil {
return 0.5, err
}
return protocol.CalculateNodeScore(score.Good(), score.Bad()), nil
}
func (p *P2PImpl) 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 *P2PImpl) SignMessageSimple(message []byte) ([]byte, error) {
signedMessage := signed.NewSignedMessageRequest(message)
signedMessage.SetNodeId(p.localNodeID)
err := signedMessage.Sign(p.Node())
if err != nil {
return nil, err
}
result, err := msgpack.Marshal(signedMessage)
if err != nil {
return nil, err
}
return result, nil
}
func (p *P2PImpl) AddPeer(peer net.Peer) error {
peerId, err := peer.Id().ToString()
if err != nil {
return err
}
p.peers.Put(peerId, peer)
p.reconnectDelay.Put(peerId, 1)
return nil
}
func (p *P2PImpl) SendPublicPeersToPeer(peer net.Peer, peersToSend []net.Peer) error {
announceRequest := signed.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
}