mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 12:57:18 +00:00
93 lines
2.6 KiB
Go
93 lines
2.6 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/peer"
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"github.com/prysmaticlabs/prysm/beacon-chain/p2p"
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"github.com/sirupsen/logrus"
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)
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const (
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codeClientShutdown uint64 = iota
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codeWrongNetwork
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codeGenericError
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)
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var goodByes = map[uint64]string{
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codeClientShutdown: "client shutdown",
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codeWrongNetwork: "irrelevant network",
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codeGenericError: "fault/error",
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}
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// goodbyeRPCHandler reads the incoming goodbye rpc message from the peer.
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func (r *Service) goodbyeRPCHandler(ctx 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).Error("Failed to close stream")
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}
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}()
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ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
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defer cancel()
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setRPCStreamDeadlines(stream)
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m, ok := msg.(*uint64)
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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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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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// closes all streams with the peer
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return r.p2p.Disconnect(stream.Conn().RemotePeer())
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}
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func (r *Service) sendGoodByeAndDisconnect(ctx context.Context, code uint64, id peer.ID) error {
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if err := r.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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if err := r.p2p.Disconnect(id); err != nil {
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return err
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}
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return nil
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}
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func (r *Service) sendGoodByeMessage(ctx context.Context, code uint64, id peer.ID) error {
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ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
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defer cancel()
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stream, err := r.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 := stream.Reset(); err != nil {
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log.WithError(err).Errorf("Failed to 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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// Add a short delay to allow the stream to flush before resetting it.
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// There is still a chance that the peer won't receive the message.
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time.Sleep(50 * time.Millisecond)
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return nil
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}
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// sends a goodbye message for a generic error
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func (r *Service) sendGenericGoodbyeMessage(ctx context.Context, id peer.ID) error {
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return r.sendGoodByeMessage(ctx, codeGenericError, id)
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}
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func goodbyeMessage(num uint64) string {
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reason, ok := goodByes[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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