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96 lines
2.1 KiB
96 lines
2.1 KiB
package attack
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import (
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"harmony-benchmark/log"
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"math/rand"
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"os"
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"sync"
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"time"
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)
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const (
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DroppingTickDuration = 2 * time.Second
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AttackEnabled = false
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HitRate = 10
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DelayResponseDuration = 10 * time.Second
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ConsensusIdThresholdMin = 10
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ConsensusIdThresholdMax = 100
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)
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type AttackType byte
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const (
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KilledItself AttackType = iota
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DelayResponse
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IncorrectTransaction
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)
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// AttackModel contains different models of attacking.
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type Attack struct {
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AttackEnabled bool
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attackType AttackType
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ConsensusIdThreshold uint32
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readyByConsensus bool
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log log.Logger // Log utility
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}
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var attack *Attack
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var once sync.Once
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// GetInstance returns attack model by using singleton pattern.
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func GetInstance() *Attack {
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once.Do(func() {
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attack = &Attack{}
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attack.Init()
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})
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return attack
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}
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func (attack *Attack) Init() {
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attack.AttackEnabled = AttackEnabled
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attack.readyByConsensus = false
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}
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func (attack *Attack) SetAttackEnabled(AttackEnabled bool) {
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attack.AttackEnabled = AttackEnabled
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if AttackEnabled {
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attack.attackType = AttackType(rand.Intn(3))
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attack.ConsensusIdThreshold = uint32(ConsensusIdThresholdMin + rand.Intn(ConsensusIdThresholdMax-ConsensusIdThresholdMin))
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}
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}
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func (attack *Attack) SetLogger(log log.Logger) {
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attack.log = log
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}
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func (attack *Attack) Run() {
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attack.NodeKilledByItSelf()
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attack.DelayResponse()
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}
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// NodeKilledByItSelf runs killing itself attack
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func (attack *Attack) NodeKilledByItSelf() {
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if !attack.AttackEnabled || attack.attackType != KilledItself || !attack.readyByConsensus {
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return
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}
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if rand.Intn(HitRate) == 0 {
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attack.log.Debug("******Killing myself*******", "PID: ", os.Getpid())
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os.Exit(1)
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}
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}
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func (attack *Attack) DelayResponse() {
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if !attack.AttackEnabled || attack.attackType != DelayResponse || !attack.readyByConsensus {
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return
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}
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if rand.Intn(HitRate) == 0 {
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time.Sleep(DelayResponseDuration)
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}
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}
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func (attack *Attack) UpdateConsensusReady(consensusId uint32) {
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if consensusId > attack.ConsensusIdThreshold {
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attack.readyByConsensus = true
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}
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}
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