mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-24 20:37:17 +00:00
120 lines
3.0 KiB
Go
120 lines
3.0 KiB
Go
// Copyright 2015 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
package les
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
const dropTimeoutRatio = 20
|
|
|
|
type odrPeerInfo struct {
|
|
reqTimeSum, reqTimeCnt, reqCnt, timeoutCnt uint64
|
|
}
|
|
|
|
// odrPeerSet represents the collection of active peer participating in the block
|
|
// download procedure.
|
|
type odrPeerSet struct {
|
|
peers map[*peer]*odrPeerInfo
|
|
lock sync.RWMutex
|
|
}
|
|
|
|
// newPeerSet creates a new peer set top track the active download sources.
|
|
func newOdrPeerSet() *odrPeerSet {
|
|
return &odrPeerSet{
|
|
peers: make(map[*peer]*odrPeerInfo),
|
|
}
|
|
}
|
|
|
|
// Register injects a new peer into the working set, or returns an error if the
|
|
// peer is already known.
|
|
func (ps *odrPeerSet) register(p *peer) error {
|
|
ps.lock.Lock()
|
|
defer ps.lock.Unlock()
|
|
|
|
if _, ok := ps.peers[p]; ok {
|
|
return errAlreadyRegistered
|
|
}
|
|
ps.peers[p] = &odrPeerInfo{}
|
|
return nil
|
|
}
|
|
|
|
// Unregister removes a remote peer from the active set, disabling any further
|
|
// actions to/from that particular entity.
|
|
func (ps *odrPeerSet) unregister(p *peer) error {
|
|
ps.lock.Lock()
|
|
defer ps.lock.Unlock()
|
|
|
|
if _, ok := ps.peers[p]; !ok {
|
|
return errNotRegistered
|
|
}
|
|
delete(ps.peers, p)
|
|
return nil
|
|
}
|
|
|
|
func (ps *odrPeerSet) peerPriority(p *peer, info *odrPeerInfo, req LesOdrRequest) uint64 {
|
|
tm := p.fcServer.CanSend(req.GetCost(p))
|
|
if info.reqTimeCnt > 0 {
|
|
tm += info.reqTimeSum / info.reqTimeCnt
|
|
}
|
|
return tm
|
|
}
|
|
|
|
func (ps *odrPeerSet) bestPeer(req LesOdrRequest, exclude map[*peer]struct{}) *peer {
|
|
var best *peer
|
|
var bpv uint64
|
|
ps.lock.Lock()
|
|
defer ps.lock.Unlock()
|
|
|
|
for p, info := range ps.peers {
|
|
if _, ok := exclude[p]; !ok {
|
|
pv := ps.peerPriority(p, info, req)
|
|
if best == nil || pv < bpv {
|
|
best = p
|
|
bpv = pv
|
|
}
|
|
}
|
|
}
|
|
return best
|
|
}
|
|
|
|
func (ps *odrPeerSet) updateTimeout(p *peer, timeout bool) (drop bool) {
|
|
ps.lock.Lock()
|
|
defer ps.lock.Unlock()
|
|
|
|
if info, ok := ps.peers[p]; ok {
|
|
info.reqCnt++
|
|
if timeout {
|
|
// check ratio before increase to allow an extra timeout
|
|
if info.timeoutCnt*dropTimeoutRatio >= info.reqCnt {
|
|
return true
|
|
}
|
|
info.timeoutCnt++
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (ps *odrPeerSet) updateServTime(p *peer, servTime uint64) {
|
|
ps.lock.Lock()
|
|
defer ps.lock.Unlock()
|
|
|
|
if info, ok := ps.peers[p]; ok {
|
|
info.reqTimeSum += servTime
|
|
info.reqTimeCnt++
|
|
}
|
|
}
|