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p2pAntifloodAndBlacklistFactory.go
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p2pAntifloodAndBlacklistFactory.go
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package factory
import (
"context"
"fmt"
"time"
"github.com/ElrondNetwork/elrond-go-core/core"
"github.com/ElrondNetwork/elrond-go-core/core/check"
logger "github.com/ElrondNetwork/elrond-go-logger"
"github.com/ElrondNetwork/elrond-go/config"
"github.com/ElrondNetwork/elrond-go/p2p"
"github.com/ElrondNetwork/elrond-go/process"
"github.com/ElrondNetwork/elrond-go/process/throttle/antiflood"
"github.com/ElrondNetwork/elrond-go/process/throttle/antiflood/blackList"
"github.com/ElrondNetwork/elrond-go/process/throttle/antiflood/disabled"
"github.com/ElrondNetwork/elrond-go/process/throttle/antiflood/floodPreventers"
"github.com/ElrondNetwork/elrond-go/statusHandler/p2pQuota"
storageFactory "github.com/ElrondNetwork/elrond-go/storage/factory"
"github.com/ElrondNetwork/elrond-go/storage/storageUnit"
"github.com/ElrondNetwork/elrond-go/storage/timecache"
)
var log = logger.GetOrCreate("p2p/antiflood/factory")
const defaultSpan = 300 * time.Second
const fastReactingIdentifier = "fast_reacting"
const slowReactingIdentifier = "slow_reacting"
const outOfSpecsIdentifier = "out_of_specs"
const outputIdentifier = "output"
var durationSweepP2PBlacklist = time.Second * 5
// AntiFloodComponents holds the handlers for the anti-flood and blacklist mechanisms
type AntiFloodComponents struct {
AntiFloodHandler process.P2PAntifloodHandler
BlacklistHandler process.PeerBlackListCacher
FloodPreventers []process.FloodPreventer
TopicPreventer process.TopicFloodPreventer
PubKeysCacher process.TimeCacher
}
// NewP2PAntiFloodComponents will return instances of antiflood and blacklist, based on the config
func NewP2PAntiFloodComponents(ctx context.Context, config config.Config, statusHandler core.AppStatusHandler, currentPid core.PeerID) (*AntiFloodComponents, error) {
if check.IfNil(statusHandler) {
return nil, p2p.ErrNilStatusHandler
}
if config.Antiflood.Enabled {
return initP2PAntiFloodComponents(ctx, config, statusHandler, currentPid)
}
return &AntiFloodComponents{
AntiFloodHandler: &disabled.AntiFlood{},
BlacklistHandler: &disabled.PeerBlacklistCacher{},
FloodPreventers: make([]process.FloodPreventer, 0),
TopicPreventer: disabled.NewNilTopicFloodPreventer(),
PubKeysCacher: &disabled.TimeCache{},
}, nil
}
func initP2PAntiFloodComponents(
ctx context.Context,
mainConfig config.Config,
statusHandler core.AppStatusHandler,
currentPid core.PeerID,
) (*AntiFloodComponents, error) {
cache := timecache.NewTimeCache(defaultSpan)
p2pPeerBlackList, err := timecache.NewPeerTimeCache(cache)
if err != nil {
return nil, err
}
publicKeysCache := timecache.NewTimeCache(defaultSpan)
fastReactingFloodPreventer, err := createFloodPreventer(
ctx,
mainConfig.Antiflood.FastReacting,
mainConfig.Antiflood.Cache,
statusHandler,
fastReactingIdentifier,
p2pPeerBlackList,
currentPid,
)
if err != nil {
return nil, fmt.Errorf("%w when creating fast reacting flood preventer", err)
}
slowReactingFloodPreventer, err := createFloodPreventer(
ctx,
mainConfig.Antiflood.SlowReacting,
mainConfig.Antiflood.Cache,
statusHandler,
slowReactingIdentifier,
p2pPeerBlackList,
currentPid,
)
if err != nil {
return nil, fmt.Errorf("%w when creating fast reacting flood preventer", err)
}
outOfSpecsFloodPreventer, err := createFloodPreventer(
ctx,
mainConfig.Antiflood.OutOfSpecs,
mainConfig.Antiflood.Cache,
statusHandler,
outOfSpecsIdentifier,
p2pPeerBlackList,
currentPid,
)
if err != nil {
return nil, fmt.Errorf("%w when creating out of specs flood preventer", err)
}
topicFloodPreventer, err := floodPreventers.NewTopicFloodPreventer(mainConfig.Antiflood.Topic.DefaultMaxMessagesPerSec)
if err != nil {
return nil, err
}
topicMaxMessages := mainConfig.Antiflood.Topic.MaxMessages
setMaxMessages(topicFloodPreventer, topicMaxMessages)
p2pAntiflood, err := antiflood.NewP2PAntiflood(
p2pPeerBlackList,
topicFloodPreventer,
fastReactingFloodPreventer,
slowReactingFloodPreventer,
outOfSpecsFloodPreventer,
)
if err != nil {
return nil, err
}
startResettingTopicFloodPreventer(ctx, topicFloodPreventer, topicMaxMessages)
startSweepingTimeCaches(ctx, p2pPeerBlackList, publicKeysCache)
return &AntiFloodComponents{
AntiFloodHandler: p2pAntiflood,
BlacklistHandler: p2pPeerBlackList,
PubKeysCacher: publicKeysCache,
FloodPreventers: []process.FloodPreventer{
fastReactingFloodPreventer,
slowReactingFloodPreventer,
outOfSpecsFloodPreventer,
},
TopicPreventer: topicFloodPreventer,
}, nil
}
func setMaxMessages(topicFloodPreventer process.TopicFloodPreventer, topicMaxMessages []config.TopicMaxMessagesConfig) {
for _, topicMaxMsg := range topicMaxMessages {
topicFloodPreventer.SetMaxMessagesForTopic(topicMaxMsg.Topic, topicMaxMsg.NumMessagesPerSec)
}
}
func startResettingTopicFloodPreventer(
ctx context.Context,
topicFloodPreventer process.TopicFloodPreventer,
topicMaxMessages []config.TopicMaxMessagesConfig,
floodPreventers ...process.FloodPreventer,
) {
localTopicMaxMessages := make([]config.TopicMaxMessagesConfig, len(topicMaxMessages))
copy(localTopicMaxMessages, topicMaxMessages)
go func() {
for {
select {
case <-ctx.Done():
log.Debug("startResettingFloodPreventers's go routine is stopping...")
return
case <-time.After(time.Second):
}
for _, fp := range floodPreventers {
fp.Reset()
}
for _, topicMaxMsg := range localTopicMaxMessages {
topicFloodPreventer.ResetForTopic(topicMaxMsg.Topic)
}
topicFloodPreventer.ResetForNotRegisteredTopics()
}
}()
}
func startSweepingTimeCaches(ctx context.Context, p2pPeerBlackList process.PeerBlackListCacher, publicKeysCache process.TimeCacher) {
go func() {
for {
select {
case <-ctx.Done():
log.Debug("startSweepingP2PPeerBlackList's go routine is stopping...")
return
case <-time.After(durationSweepP2PBlacklist):
}
p2pPeerBlackList.Sweep()
publicKeysCache.Sweep()
}
}()
}
func createFloodPreventer(
ctx context.Context,
floodPreventerConfig config.FloodPreventerConfig,
antifloodCacheConfig config.CacheConfig,
statusHandler core.AppStatusHandler,
quotaIdentifier string,
blackListHandler process.PeerBlackListCacher,
selfPid core.PeerID,
) (process.FloodPreventer, error) {
cacheConfig := storageFactory.GetCacherFromConfig(antifloodCacheConfig)
blackListCache, err := storageUnit.NewCache(cacheConfig)
if err != nil {
return nil, err
}
blackListProcessor, err := blackList.NewP2PBlackListProcessor(
blackListCache,
blackListHandler,
floodPreventerConfig.BlackList.ThresholdNumMessagesPerInterval,
floodPreventerConfig.BlackList.ThresholdSizePerInterval,
floodPreventerConfig.BlackList.NumFloodingRounds,
time.Duration(floodPreventerConfig.BlackList.PeerBanDurationInSeconds)*time.Second,
quotaIdentifier,
selfPid,
)
if err != nil {
return nil, err
}
antifloodCache, err := storageUnit.NewCache(cacheConfig)
if err != nil {
return nil, err
}
quotaProcessor, err := p2pQuota.NewP2PQuotaProcessor(statusHandler, quotaIdentifier)
if err != nil {
return nil, err
}
basePeerMaxMessagesPerInterval := floodPreventerConfig.PeerMaxInput.BaseMessagesPerInterval
peerMaxTotalSizePerInterval := floodPreventerConfig.PeerMaxInput.TotalSizePerInterval
reservedPercent := floodPreventerConfig.ReservedPercent
argFloodPreventer := floodPreventers.ArgQuotaFloodPreventer{
Name: quotaIdentifier,
Cacher: antifloodCache,
StatusHandlers: []floodPreventers.QuotaStatusHandler{quotaProcessor, blackListProcessor},
BaseMaxNumMessagesPerPeer: basePeerMaxMessagesPerInterval,
MaxTotalSizePerPeer: peerMaxTotalSizePerInterval,
PercentReserved: reservedPercent,
IncreaseThreshold: floodPreventerConfig.PeerMaxInput.IncreaseFactor.Threshold,
IncreaseFactor: floodPreventerConfig.PeerMaxInput.IncreaseFactor.Factor,
}
floodPreventer, err := floodPreventers.NewQuotaFloodPreventer(argFloodPreventer)
if err != nil {
return nil, err
}
log.Debug("started antiflood & blacklist component",
"type", quotaIdentifier,
"interval in seconds", floodPreventerConfig.IntervalInSeconds,
"base peerMaxMessagesPerInterval", basePeerMaxMessagesPerInterval,
"peerMaxTotalSizePerInterval", core.ConvertBytes(peerMaxTotalSizePerInterval),
"peerBanDurationInSeconds", floodPreventerConfig.BlackList.PeerBanDurationInSeconds,
"thresholdNumMessagesPerSecond", floodPreventerConfig.BlackList.ThresholdNumMessagesPerInterval,
"thresholdSizePerSecond", floodPreventerConfig.BlackList.ThresholdSizePerInterval,
"numFloodingRounds", floodPreventerConfig.BlackList.NumFloodingRounds,
"increase threshold", floodPreventerConfig.PeerMaxInput.IncreaseFactor.Threshold,
"increase factor", floodPreventerConfig.PeerMaxInput.IncreaseFactor.Factor,
)
go func() {
wait := time.Duration(floodPreventerConfig.IntervalInSeconds) * time.Second
for {
select {
case <-ctx.Done():
log.Debug("floodPreventer.Reset go routine is stopping...")
return
case <-time.After(wait):
}
floodPreventer.Reset()
}
}()
return floodPreventer, nil
}