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msgCountByPeer is a CMap

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This commit is contained in:
Ethan Buchman
2017-04-20 17:29:43 -04:00
parent 391c738959
commit 75bad132fc
1 changed files with 18 additions and 5 deletions
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23
pex_reactor.go
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@ -49,7 +49,7 @@ type PEXReactor struct {
ensurePeersPeriod time.Duration
// tracks message count by peer, so we can prevent abuse
msgCountByPeer map[string]uint16
msgCountByPeer *cmn.CMap
maxMsgCountByPeer uint16
}
@ -58,7 +58,7 @@ func NewPEXReactor(b *AddrBook) *PEXReactor {
r := &PEXReactor{
book: b,
ensurePeersPeriod: defaultEnsurePeersPeriod,
msgCountByPeer: make(map[string]uint16),
msgCountByPeer: cmn.NewCMap(),
maxMsgCountByPeer: defaultMaxMsgCountByPeer,
}
r.BaseReactor = *NewBaseReactor(log, "PEXReactor", r)
@ -122,7 +122,8 @@ func (r *PEXReactor) RemovePeer(p *Peer, reason interface{}) {
func (r *PEXReactor) Receive(chID byte, src *Peer, msgBytes []byte) {
srcAddr := src.Connection().RemoteAddress
srcAddrStr := srcAddr.String()
r.msgCountByPeer[srcAddrStr]++
r.IncrementMsgCountForPeer(srcAddrStr)
if r.ReachedMaxMsgCountForPeer(srcAddrStr) {
log.Warn("Maximum number of messages reached for peer", "peer", srcAddrStr)
// TODO remove src from peers?
@ -175,8 +176,20 @@ func (r *PEXReactor) SetMaxMsgCountByPeer(v uint16) {
// ReachedMaxMsgCountForPeer returns true if we received too many
// messages from peer with address `addr`.
// NOTE: assumes the value in the CMap is non-nil
func (r *PEXReactor) ReachedMaxMsgCountForPeer(addr string) bool {
return r.msgCountByPeer[addr] >= r.maxMsgCountByPeer
return r.msgCountByPeer.Get(addr).(uint16) >= r.maxMsgCountByPeer
}
// Increment or initialize the msg count for the peer in the CMap
func (r *PEXReactor) IncrementMsgCountForPeer(addr string) {
var count uint16
countI := r.msgCountByPeer.Get(addr)
if countI != nil {
count = countI.(uint16)
}
count++
r.msgCountByPeer.Set(addr, count)
}
// Ensures that sufficient peers are connected. (continuous)
@ -288,7 +301,7 @@ func (r *PEXReactor) flushMsgCountByPeer() {
for {
select {
case <-ticker.C:
r.msgCountByPeer = make(map[string]uint16)
r.msgCountByPeer.Clear()
case <-r.Quit:
ticker.Stop()
return