mirror of https://github.com/v2ray/v2ray-core
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
146 lines
3.3 KiB
146 lines
3.3 KiB
package protocol
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/v2ray/v2ray-core/common"
|
|
"github.com/v2ray/v2ray-core/common/signal"
|
|
)
|
|
|
|
const (
|
|
updateIntervalSec = 10
|
|
cacheDurationSec = 120
|
|
)
|
|
|
|
type idEntry struct {
|
|
id *ID
|
|
userIdx int
|
|
lastSec Timestamp
|
|
lastSecRemoval Timestamp
|
|
}
|
|
|
|
type UserValidator interface {
|
|
common.Releasable
|
|
|
|
Add(user *User) error
|
|
Get(timeHash []byte) (*User, Timestamp, bool)
|
|
}
|
|
|
|
type TimedUserValidator struct {
|
|
validUsers []*User
|
|
userHash map[[16]byte]*indexTimePair
|
|
ids []*idEntry
|
|
access sync.RWMutex
|
|
hasher IDHash
|
|
cancel *signal.CancelSignal
|
|
}
|
|
|
|
type indexTimePair struct {
|
|
index int
|
|
timeSec Timestamp
|
|
}
|
|
|
|
func NewTimedUserValidator(hasher IDHash) UserValidator {
|
|
tus := &TimedUserValidator{
|
|
validUsers: make([]*User, 0, 16),
|
|
userHash: make(map[[16]byte]*indexTimePair, 512),
|
|
access: sync.RWMutex{},
|
|
ids: make([]*idEntry, 0, 512),
|
|
hasher: hasher,
|
|
cancel: signal.NewCloseSignal(),
|
|
}
|
|
go tus.updateUserHash(time.Tick(updateIntervalSec*time.Second), tus.cancel)
|
|
return tus
|
|
}
|
|
|
|
func (this *TimedUserValidator) Release() {
|
|
this.cancel.Cancel()
|
|
<-this.cancel.WaitForDone()
|
|
|
|
this.validUsers = nil
|
|
this.userHash = nil
|
|
this.ids = nil
|
|
this.hasher = nil
|
|
this.cancel = nil
|
|
}
|
|
|
|
func (this *TimedUserValidator) generateNewHashes(nowSec Timestamp, idx int, entry *idEntry) {
|
|
var hashValue [16]byte
|
|
var hashValueRemoval [16]byte
|
|
idHash := this.hasher(entry.id.Bytes())
|
|
for entry.lastSec <= nowSec {
|
|
idHash.Write(entry.lastSec.Bytes())
|
|
idHash.Sum(hashValue[:0])
|
|
idHash.Reset()
|
|
|
|
idHash.Write(entry.lastSecRemoval.Bytes())
|
|
idHash.Sum(hashValueRemoval[:0])
|
|
idHash.Reset()
|
|
|
|
this.access.Lock()
|
|
this.userHash[hashValue] = &indexTimePair{idx, entry.lastSec}
|
|
delete(this.userHash, hashValueRemoval)
|
|
this.access.Unlock()
|
|
|
|
entry.lastSec++
|
|
entry.lastSecRemoval++
|
|
}
|
|
}
|
|
|
|
func (this *TimedUserValidator) updateUserHash(tick <-chan time.Time, cancel *signal.CancelSignal) {
|
|
L:
|
|
for {
|
|
select {
|
|
case now := <-tick:
|
|
nowSec := Timestamp(now.Unix() + cacheDurationSec)
|
|
for _, entry := range this.ids {
|
|
this.generateNewHashes(nowSec, entry.userIdx, entry)
|
|
}
|
|
case <-cancel.WaitForCancel():
|
|
break L
|
|
}
|
|
}
|
|
cancel.Done()
|
|
}
|
|
|
|
func (this *TimedUserValidator) Add(user *User) error {
|
|
idx := len(this.validUsers)
|
|
this.validUsers = append(this.validUsers, user)
|
|
|
|
nowSec := time.Now().Unix()
|
|
|
|
entry := &idEntry{
|
|
id: user.ID,
|
|
userIdx: idx,
|
|
lastSec: Timestamp(nowSec - cacheDurationSec),
|
|
lastSecRemoval: Timestamp(nowSec - cacheDurationSec*3),
|
|
}
|
|
this.generateNewHashes(Timestamp(nowSec+cacheDurationSec), idx, entry)
|
|
this.ids = append(this.ids, entry)
|
|
for _, alterid := range user.AlterIDs {
|
|
entry := &idEntry{
|
|
id: alterid,
|
|
userIdx: idx,
|
|
lastSec: Timestamp(nowSec - cacheDurationSec),
|
|
lastSecRemoval: Timestamp(nowSec - cacheDurationSec*3),
|
|
}
|
|
this.generateNewHashes(Timestamp(nowSec+cacheDurationSec), idx, entry)
|
|
this.ids = append(this.ids, entry)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (this *TimedUserValidator) Get(userHash []byte) (*User, Timestamp, bool) {
|
|
defer this.access.RUnlock()
|
|
this.access.RLock()
|
|
var fixedSizeHash [16]byte
|
|
copy(fixedSizeHash[:], userHash)
|
|
pair, found := this.userHash[fixedSizeHash]
|
|
if found {
|
|
return this.validUsers[pair.index], pair.timeSec, true
|
|
}
|
|
return nil, 0, false
|
|
}
|