mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
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76 lines
2.8 KiB
Go
76 lines
2.8 KiB
Go
package p2p
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import (
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"context"
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"io"
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"github.com/libp2p/go-libp2p-core/network"
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"github.com/libp2p/go-libp2p-core/peer"
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"github.com/prysmaticlabs/prysm/beacon-chain/sync/peerstatus"
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)
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// AddConnectionHandler adds a callback function which handles the connection with a
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// newly added peer. It performs a handshake with that peer by sending a hello request
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// and validating the response from the peer.
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func (s *Service) AddConnectionHandler(reqFunc func(ctx context.Context, id peer.ID) error) {
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s.host.Network().Notify(&network.NotifyBundle{
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ConnectedF: func(net network.Network, conn network.Conn) {
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if peerstatus.IsBadPeer(conn.RemotePeer()) {
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// Add Peer to gossipsub blacklist
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s.pubsub.BlacklistPeer(conn.RemotePeer())
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log.WithField("peerID", conn.RemotePeer().Pretty()).Trace("Disconnecting with bad peer")
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if err := s.Disconnect(conn.RemotePeer()); err != nil {
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log.WithError(err).Errorf("Unable to close peer %s", conn.RemotePeer())
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return
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}
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return
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}
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// Must be handled in a goroutine as this callback cannot be blocking.
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go func() {
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ctx := context.Background()
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log := log.WithField("peer", conn.RemotePeer())
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if conn.Stat().Direction == network.DirInbound {
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log.Debug("Not sending hello for inbound connection")
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return
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}
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log.Debug("Performing handshake with peer")
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if err := reqFunc(ctx, conn.RemotePeer()); err != nil && err != io.EOF {
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log.WithError(err).Debug("Could not send successful hello rpc request")
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if err.Error() == "protocol not supported" {
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log.Debug("Not disconnecting peer with unsupported protocol. This may be the DHT node or relay.")
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return
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}
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if err := s.Disconnect(conn.RemotePeer()); err != nil {
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log.WithError(err).Errorf("Unable to close peer %s", conn.RemotePeer())
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return
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}
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return
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}
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log.WithField("peer", conn.RemotePeer().Pretty()).Info("New peer connected")
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}()
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},
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})
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}
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// AddDisconnectionHandler ensures that previously disconnected peers aren't dialed again. Due
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// to either their ports being closed, nodes are no longer active,etc. This also calls the handler
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// responsible for maintaining other parts of the sync or p2p system.
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func (s *Service) AddDisconnectionHandler(handler func(ctx context.Context, id peer.ID) error) {
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s.host.Network().Notify(&network.NotifyBundle{
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DisconnectedF: func(net network.Network, conn network.Conn) {
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// Must be handled in a goroutine as this callback cannot be blocking.
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go func() {
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s.exclusionList.Set(conn.RemotePeer().String(), true, ttl)
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log := log.WithField("peer", conn.RemotePeer())
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log.Debug("Peer is added to exclusion list")
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ctx := context.Background()
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if err := handler(ctx, conn.RemotePeer()); err != nil {
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log.WithError(err).Error("Failed to handle disconnecting peer")
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}
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}()
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},
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})
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}
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