mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2025-01-01 00:31:21 +00:00
90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
/*
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Copyright 2022 Erigon-Lightclient contributors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package peers
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import (
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"sync"
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lru "github.com/hashicorp/golang-lru"
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"github.com/ledgerwatch/log/v3"
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"github.com/libp2p/go-libp2p/core/host"
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"github.com/libp2p/go-libp2p/core/peer"
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)
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const (
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maxBadPeers = 1000 // Always cap memory consumption at 1 MB
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DefaultMaxPeers = 200
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MaxBadResponses = 10
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)
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type Peers struct {
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badPeers *lru.Cache // Keep track of bad peers
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penalties *lru.Cache // Keep track on how many penalties a peer accumulated, PeerId => penalties
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host host.Host
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mu sync.Mutex
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}
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func New(host host.Host) *Peers {
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badPeers, err := lru.New(maxBadPeers)
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if err != nil {
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panic(err)
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}
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penalties, err := lru.New(maxBadPeers)
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if err != nil {
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panic(err)
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}
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return &Peers{
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badPeers: badPeers,
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penalties: penalties,
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host: host,
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}
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}
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func (p *Peers) IsBadPeer(pid peer.ID) bool {
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p.mu.Lock()
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defer p.mu.Unlock()
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return p.badPeers.Contains(pid)
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}
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func (p *Peers) Penalize(pid peer.ID) {
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p.mu.Lock()
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defer p.mu.Unlock()
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penaltyInterface, has := p.penalties.Get(pid)
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if !has {
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p.penalties.Add(pid, 1)
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return
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}
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penalties := penaltyInterface.(int) + 1
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p.penalties.Add(pid, penalties)
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// Drop peer and delete the map element.
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if penalties > MaxBadResponses {
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p.banBadPeer(pid)
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p.penalties.Remove(pid)
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}
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}
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func (p *Peers) banBadPeer(pid peer.ID) {
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p.DisconnectPeer(pid)
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p.badPeers.Add(pid, []byte{0})
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log.Debug("[Peers] bad peers has been banned", "peer-id", pid)
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}
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func (p *Peers) DisconnectPeer(pid peer.ID) {
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log.Trace("[Peers] disconnecting from peer", "peer-id", pid)
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p.host.Peerstore().RemovePeer(pid)
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}
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