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.
138 lines
3.2 KiB
138 lines
3.2 KiB
package protocol
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
proto "github.com/v2ray/v2ray-core/common/protocol"
|
|
"github.com/v2ray/v2ray-core/common/serial"
|
|
)
|
|
|
|
const (
|
|
updateIntervalSec = 10
|
|
cacheDurationSec = 120
|
|
)
|
|
|
|
type Timestamp int64
|
|
|
|
func (this Timestamp) Bytes() []byte {
|
|
return serial.Int64Literal(this).Bytes()
|
|
}
|
|
|
|
func (this Timestamp) HashBytes() []byte {
|
|
once := this.Bytes()
|
|
bytes := make([]byte, 0, 32)
|
|
bytes = append(bytes, once...)
|
|
bytes = append(bytes, once...)
|
|
bytes = append(bytes, once...)
|
|
bytes = append(bytes, once...)
|
|
return bytes
|
|
}
|
|
|
|
type idEntry struct {
|
|
id *proto.ID
|
|
userIdx int
|
|
lastSec Timestamp
|
|
lastSecRemoval Timestamp
|
|
}
|
|
|
|
type UserSet interface {
|
|
AddUser(user *proto.User) error
|
|
GetUser(timeHash []byte) (*proto.User, Timestamp, bool)
|
|
}
|
|
|
|
type TimedUserSet struct {
|
|
validUsers []*proto.User
|
|
userHash map[[16]byte]indexTimePair
|
|
ids []*idEntry
|
|
access sync.RWMutex
|
|
}
|
|
|
|
type indexTimePair struct {
|
|
index int
|
|
timeSec Timestamp
|
|
}
|
|
|
|
func NewTimedUserSet() UserSet {
|
|
tus := &TimedUserSet{
|
|
validUsers: make([]*proto.User, 0, 16),
|
|
userHash: make(map[[16]byte]indexTimePair, 512),
|
|
access: sync.RWMutex{},
|
|
ids: make([]*idEntry, 0, 512),
|
|
}
|
|
go tus.updateUserHash(time.Tick(updateIntervalSec * time.Second))
|
|
return tus
|
|
}
|
|
|
|
func (us *TimedUserSet) generateNewHashes(nowSec Timestamp, idx int, entry *idEntry) {
|
|
var hashValue [16]byte
|
|
var hashValueRemoval [16]byte
|
|
idHash := IDHash(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()
|
|
|
|
us.access.Lock()
|
|
us.userHash[hashValue] = indexTimePair{idx, entry.lastSec}
|
|
delete(us.userHash, hashValueRemoval)
|
|
us.access.Unlock()
|
|
|
|
entry.lastSec++
|
|
entry.lastSecRemoval++
|
|
}
|
|
}
|
|
|
|
func (us *TimedUserSet) updateUserHash(tick <-chan time.Time) {
|
|
for now := range tick {
|
|
nowSec := Timestamp(now.Unix() + cacheDurationSec)
|
|
for _, entry := range us.ids {
|
|
us.generateNewHashes(nowSec, entry.userIdx, entry)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (us *TimedUserSet) AddUser(user *proto.User) error {
|
|
idx := len(us.validUsers)
|
|
us.validUsers = append(us.validUsers, user)
|
|
|
|
nowSec := time.Now().Unix()
|
|
|
|
entry := &idEntry{
|
|
id: user.ID,
|
|
userIdx: idx,
|
|
lastSec: Timestamp(nowSec - cacheDurationSec),
|
|
lastSecRemoval: Timestamp(nowSec - cacheDurationSec*3),
|
|
}
|
|
us.generateNewHashes(Timestamp(nowSec+cacheDurationSec), idx, entry)
|
|
us.ids = append(us.ids, entry)
|
|
for _, alterid := range user.AlterIDs {
|
|
entry := &idEntry{
|
|
id: alterid,
|
|
userIdx: idx,
|
|
lastSec: Timestamp(nowSec - cacheDurationSec),
|
|
lastSecRemoval: Timestamp(nowSec - cacheDurationSec*3),
|
|
}
|
|
us.generateNewHashes(Timestamp(nowSec+cacheDurationSec), idx, entry)
|
|
us.ids = append(us.ids, entry)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (us *TimedUserSet) GetUser(userHash []byte) (*proto.User, Timestamp, bool) {
|
|
defer us.access.RUnlock()
|
|
us.access.RLock()
|
|
var fixedSizeHash [16]byte
|
|
copy(fixedSizeHash[:], userHash)
|
|
pair, found := us.userHash[fixedSizeHash]
|
|
if found {
|
|
return us.validUsers[pair.index], pair.timeSec, true
|
|
}
|
|
return nil, 0, false
|
|
}
|