github.com/v2fly/v2ray-core/v5@v5.16.2-0.20240507031116-8191faa6e095/common/antireplay/bloomring.go (about)

     1  package antireplay
     2  
     3  import (
     4  	"sync"
     5  
     6  	ss_bloomring "github.com/v2fly/ss-bloomring"
     7  )
     8  
     9  type BloomRing struct {
    10  	*ss_bloomring.BloomRing
    11  	lock *sync.Mutex
    12  }
    13  
    14  func (b BloomRing) Interval() int64 {
    15  	return 9999999
    16  }
    17  
    18  func (b BloomRing) Check(sum []byte) bool {
    19  	b.lock.Lock()
    20  	defer b.lock.Unlock()
    21  	if b.Test(sum) {
    22  		return false
    23  	}
    24  	b.Add(sum)
    25  	return true
    26  }
    27  
    28  func NewBloomRing() BloomRing {
    29  	const (
    30  		DefaultSFCapacity = 1e6
    31  		// FalsePositiveRate
    32  		DefaultSFFPR  = 1e-6
    33  		DefaultSFSlot = 10
    34  	)
    35  	return BloomRing{ss_bloomring.NewBloomRing(DefaultSFSlot, DefaultSFCapacity, DefaultSFFPR), &sync.Mutex{}}
    36  }