prysm-pulse/beacon-chain/sync/rpc_goodbye.go
Preston Van Loon 7cc32c4dda
Various code inspection resolutions (#7438)
* remove unused code

* remove defer use in loop

* Remove unused methods and constants

* gofmt and gaz

* nilness check

* remove unused args

* Add TODO for refactoring subscribeWithBase to remove unused arg. It seems too involved to include in this sweeping PR. https://github.com/prysmaticlabs/prysm/issues/7437

* replace empty slice declaration

* Remove unnecessary type conversions

* remove redundant type declaration

* rename receivers to be consistent

* Remove bootnode query tool. It is now obsolete by discv5

* Remove relay node. It is no longer used or supported

* Revert "Remove relay node. It is no longer used or supported"

This reverts commit 4bd7717334dad85ef4766ed9bc4da711fb5fa810.

* Delete unused test directory

* Delete unsupported gcp startup script

* Delete old k8s script

* build fixes

* fix build

* go mod tidy

* revert slasher/db/kv/block_header.go

* fix build

* remove redundant nil check

* combine func args

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
Co-authored-by: Victor Farazdagi <simple.square@gmail.com>
2020-10-12 08:11:05 +00:00

90 lines
2.6 KiB
Go

package sync
import (
"context"
"fmt"
"time"
libp2pcore "github.com/libp2p/go-libp2p-core"
"github.com/libp2p/go-libp2p-core/helpers"
"github.com/libp2p/go-libp2p-core/mux"
"github.com/libp2p/go-libp2p-core/peer"
"github.com/prysmaticlabs/prysm/beacon-chain/p2p"
"github.com/sirupsen/logrus"
)
const (
codeClientShutdown uint64 = iota
codeWrongNetwork
codeGenericError
)
var goodByes = map[uint64]string{
codeClientShutdown: "client shutdown",
codeWrongNetwork: "irrelevant network",
codeGenericError: "fault/error",
}
// Add a short delay to allow the stream to flush before resetting it.
// There is still a chance that the peer won't receive the message.
const flushDelay = 50 * time.Millisecond
// goodbyeRPCHandler reads the incoming goodbye rpc message from the peer.
func (s *Service) goodbyeRPCHandler(_ context.Context, msg interface{}, stream libp2pcore.Stream) error {
defer func() {
if err := stream.Close(); err != nil {
log.WithError(err).Error("Failed to close stream")
}
}()
SetRPCStreamDeadlines(stream)
m, ok := msg.(*uint64)
if !ok {
return fmt.Errorf("wrong message type for goodbye, got %T, wanted *uint64", msg)
}
if err := s.rateLimiter.validateRequest(stream, 1); err != nil {
return err
}
s.rateLimiter.add(stream, 1)
log := log.WithField("Reason", goodbyeMessage(*m))
log.WithField("peer", stream.Conn().RemotePeer()).Debug("Peer has sent a goodbye message")
// closes all streams with the peer
return s.p2p.Disconnect(stream.Conn().RemotePeer())
}
func (s *Service) sendGoodByeAndDisconnect(ctx context.Context, code uint64, id peer.ID) error {
if err := s.sendGoodByeMessage(ctx, code, id); err != nil {
log.WithFields(logrus.Fields{
"error": err,
"peer": id,
}).Debug("Could not send goodbye message to peer")
}
return s.p2p.Disconnect(id)
}
func (s *Service) sendGoodByeMessage(ctx context.Context, code uint64, id peer.ID) error {
ctx, cancel := context.WithTimeout(ctx, respTimeout)
defer cancel()
stream, err := s.p2p.Send(ctx, &code, p2p.RPCGoodByeTopic, id)
if err != nil {
return err
}
defer func() {
if err := helpers.FullClose(stream); err != nil && err.Error() != mux.ErrReset.Error() {
log.WithError(err).Debugf("Failed to reset stream with protocol %s", stream.Protocol())
}
}()
log := log.WithField("Reason", goodbyeMessage(code))
log.WithField("peer", stream.Conn().RemotePeer()).Debug("Sending Goodbye message to peer")
return nil
}
func goodbyeMessage(num uint64) string {
reason, ok := goodByes[num]
if ok {
return reason
}
return fmt.Sprintf("unknown goodbye value of %d Received", num)
}