mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 12:57:18 +00:00
121 lines
4.0 KiB
Go
121 lines
4.0 KiB
Go
package sync
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import (
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"context"
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"fmt"
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"time"
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libp2pcore "github.com/libp2p/go-libp2p-core"
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"github.com/libp2p/go-libp2p-core/helpers"
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"github.com/libp2p/go-libp2p-core/mux"
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"github.com/libp2p/go-libp2p-core/peer"
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"github.com/prysmaticlabs/prysm/beacon-chain/p2p"
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"github.com/prysmaticlabs/prysm/beacon-chain/p2p/types"
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"github.com/sirupsen/logrus"
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)
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var backOffTime = map[types.SSZUint64]time.Duration{
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// Do not dial peers which are from a different/unverifiable
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// network.
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types.GoodbyeCodeWrongNetwork: 24 * time.Hour,
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types.GoodbyeCodeUnableToVerifyNetwork: 24 * time.Hour,
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// If local peer is banned, we back off for
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// 2 hours to let the remote peer score us
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// back up again.
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types.GoodbyeCodeBadScore: 2 * time.Hour,
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types.GoodbyeCodeBanned: 2 * time.Hour,
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types.GoodbyeCodeClientShutdown: 1 * time.Hour,
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// Wait 5 minutes before dialing a peer who is
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// 'full'
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types.GoodbyeCodeTooManyPeers: 5 * time.Minute,
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types.GoodbyeCodeGenericError: 2 * time.Minute,
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}
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// goodbyeRPCHandler reads the incoming goodbye rpc message from the peer.
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func (s *Service) goodbyeRPCHandler(_ context.Context, msg interface{}, stream libp2pcore.Stream) error {
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defer func() {
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if err := stream.Close(); err != nil {
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log.WithError(err).Debug("Could not close stream")
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}
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}()
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SetRPCStreamDeadlines(stream)
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m, ok := msg.(*types.SSZUint64)
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if !ok {
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return fmt.Errorf("wrong message type for goodbye, got %T, wanted *uint64", msg)
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}
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if err := s.rateLimiter.validateRequest(stream, 1); err != nil {
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return err
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}
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s.rateLimiter.add(stream, 1)
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log := log.WithField("Reason", goodbyeMessage(*m))
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log.WithField("peer", stream.Conn().RemotePeer()).Debug("Peer has sent a goodbye message")
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s.p2p.Peers().SetNextValidTime(stream.Conn().RemotePeer(), goodByeBackoff(*m))
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// closes all streams with the peer
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return s.p2p.Disconnect(stream.Conn().RemotePeer())
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}
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// disconnectBadPeer checks whether peer is considered bad by some scorer, and tries to disconnect
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// the peer, if that is the case. Additionally, disconnection reason is obtained from scorer.
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func (s *Service) disconnectBadPeer(ctx context.Context, id peer.ID) {
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if !s.p2p.Peers().IsBad(id) {
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return
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}
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goodbyeCode := types.ErrToGoodbyeCode(s.p2p.Peers().Scorers().ValidationError(id))
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if err := s.sendGoodByeAndDisconnect(ctx, goodbyeCode, id); err != nil {
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log.Debugf("Error when disconnecting with bad peer: %v", err)
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}
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}
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// A custom goodbye method that is used by our connection handler, in the
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// event we receive bad peers.
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func (s *Service) sendGoodbye(ctx context.Context, id peer.ID) error {
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return s.sendGoodByeAndDisconnect(ctx, types.GoodbyeCodeGenericError, id)
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}
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func (s *Service) sendGoodByeAndDisconnect(ctx context.Context, code types.RPCGoodbyeCode, id peer.ID) error {
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if err := s.sendGoodByeMessage(ctx, code, id); err != nil {
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log.WithFields(logrus.Fields{
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"error": err,
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"peer": id,
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}).Debug("Could not send goodbye message to peer")
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}
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return s.p2p.Disconnect(id)
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}
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func (s *Service) sendGoodByeMessage(ctx context.Context, code types.RPCGoodbyeCode, id peer.ID) error {
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ctx, cancel := context.WithTimeout(ctx, respTimeout)
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defer cancel()
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stream, err := s.p2p.Send(ctx, &code, p2p.RPCGoodByeTopic, id)
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if err != nil {
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return err
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}
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defer func() {
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if err := helpers.FullClose(stream); err != nil && err.Error() != mux.ErrReset.Error() {
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log.WithError(err).Debugf("Could not reset stream with protocol %s", stream.Protocol())
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}
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}()
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log := log.WithField("Reason", goodbyeMessage(code))
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log.WithField("peer", stream.Conn().RemotePeer()).Debug("Sending Goodbye message to peer")
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return nil
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}
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func goodbyeMessage(num types.RPCGoodbyeCode) string {
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reason, ok := types.GoodbyeCodeMessages[num]
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if ok {
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return reason
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}
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return fmt.Sprintf("unknown goodbye value of %d received", num)
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}
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// determines which backoff time to use depending on the
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// goodbye code provided.
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func goodByeBackoff(num types.RPCGoodbyeCode) time.Time {
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duration, ok := backOffTime[num]
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if !ok {
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return time.Time{}
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}
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return time.Now().Add(duration)
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}
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