mirror of
https://github.com/fatedier/frp.git
synced 2024-12-15 03:01:43 +01:00
329 lines
12 KiB
Go
329 lines
12 KiB
Go
// Copyright 2023 The frp Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package nathole
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/samber/lo"
|
|
)
|
|
|
|
var (
|
|
// mode 0, both EasyNAT, PublicNetwork is always receiver
|
|
// sender | receiver, ttl 7
|
|
// receiver, ttl 7 | sender
|
|
// sender | receiver, ttl 4
|
|
// receiver, ttl 4 | sender
|
|
// sender | receiver
|
|
// receiver | sender
|
|
// sender, sendDelayMs 5000 | receiver
|
|
// sender, sendDelayMs 10000 | receiver
|
|
// receiver | sender, sendDelayMs 5000
|
|
// receiver | sender, sendDelayMs 10000
|
|
mode0Behaviors = []lo.Tuple2[RecommandBehavior, RecommandBehavior]{
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 7}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver, TTL: 7}, RecommandBehavior{Role: DetectRoleSender}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 4}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver, TTL: 4}, RecommandBehavior{Role: DetectRoleSender}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender}, RecommandBehavior{Role: DetectRoleReceiver}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver}, RecommandBehavior{Role: DetectRoleSender}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, SendDelayMs: 5000}, RecommandBehavior{Role: DetectRoleReceiver}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, SendDelayMs: 10000}, RecommandBehavior{Role: DetectRoleReceiver}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver}, RecommandBehavior{Role: DetectRoleSender, SendDelayMs: 5000}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver}, RecommandBehavior{Role: DetectRoleSender, SendDelayMs: 10000}),
|
|
}
|
|
|
|
// mode 1, HardNAT is sender, EasyNAT is receiver, port changes is regular
|
|
// sender | receiver, ttl 7, portsRangeNumber max 10
|
|
// sender, sendDelayMs 2000 | receiver, ttl 7, portsRangeNumber max 10
|
|
// sender | receiver, ttl 4, portsRangeNumber max 10
|
|
// sender, sendDelayMs 2000 | receiver, ttl 4, portsRangeNumber max 10
|
|
// sender | receiver, portsRangeNumber max 10
|
|
// sender, sendDelayMs 2000 | receiver, portsRangeNumber max 10
|
|
mode1Behaviors = []lo.Tuple2[RecommandBehavior, RecommandBehavior]{
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 7, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, SendDelayMs: 2000}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 7, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 4, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, SendDelayMs: 2000}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 4, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender}, RecommandBehavior{Role: DetectRoleReceiver, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, SendDelayMs: 2000}, RecommandBehavior{Role: DetectRoleReceiver, PortsRangeNumber: 10}),
|
|
}
|
|
|
|
// mode 2, HardNAT is receiver, EasyNAT is sender
|
|
// sender, portsRandomNumber 1000, sendDelayMs 3000 | receiver, listen 256 ports, ttl 7
|
|
// sender, portsRandomNumber 1000, sendDelayMs 3000 | receiver, listen 256 ports, ttl 4
|
|
// sender, portsRandomNumber 1000, sendDelayMs 3000 | receiver, listen 256 ports
|
|
mode2Behaviors = []lo.Tuple2[RecommandBehavior, RecommandBehavior]{
|
|
lo.T2(
|
|
RecommandBehavior{Role: DetectRoleSender, PortsRandomNumber: 1000, SendDelayMs: 3000},
|
|
RecommandBehavior{Role: DetectRoleReceiver, ListenRandomPorts: 256, TTL: 7},
|
|
),
|
|
lo.T2(
|
|
RecommandBehavior{Role: DetectRoleSender, PortsRandomNumber: 1000, SendDelayMs: 3000},
|
|
RecommandBehavior{Role: DetectRoleReceiver, ListenRandomPorts: 256, TTL: 4},
|
|
),
|
|
lo.T2(
|
|
RecommandBehavior{Role: DetectRoleSender, PortsRandomNumber: 1000, SendDelayMs: 3000},
|
|
RecommandBehavior{Role: DetectRoleReceiver, ListenRandomPorts: 256},
|
|
),
|
|
}
|
|
|
|
// mode 3, For HardNAT & HardNAT, both changes in the ports are regular
|
|
// sender, portsRangeNumber 10 | receiver, ttl 7, portsRangeNumber 10
|
|
// sender, portsRangeNumber 10 | receiver, ttl 4, portsRangeNumber 10
|
|
// sender, portsRangeNumber 10 | receiver, portsRangeNumber 10
|
|
// receiver, ttl 7, portsRangeNumber 10 | sender, portsRangeNumber 10
|
|
// receiver, ttl 4, portsRangeNumber 10 | sender, portsRangeNumber 10
|
|
// receiver, portsRangeNumber 10 | sender, portsRangeNumber 10
|
|
mode3Behaviors = []lo.Tuple2[RecommandBehavior, RecommandBehavior]{
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, PortsRangeNumber: 10}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 7, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, PortsRangeNumber: 10}, RecommandBehavior{Role: DetectRoleReceiver, TTL: 4, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleSender, PortsRangeNumber: 10}, RecommandBehavior{Role: DetectRoleReceiver, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver, TTL: 7, PortsRangeNumber: 10}, RecommandBehavior{Role: DetectRoleSender, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver, TTL: 4, PortsRangeNumber: 10}, RecommandBehavior{Role: DetectRoleSender, PortsRangeNumber: 10}),
|
|
lo.T2(RecommandBehavior{Role: DetectRoleReceiver, PortsRangeNumber: 10}, RecommandBehavior{Role: DetectRoleSender, PortsRangeNumber: 10}),
|
|
}
|
|
|
|
// mode 4, Regular ports changes are usually the sender.
|
|
// sender, portsRandomNumber 1000, sendDelayMs: 2000 | receiver, listen 256 ports, ttl 7, portsRangeNumber 2
|
|
// sender, portsRandomNumber 1000, sendDelayMs: 2000 | receiver, listen 256 ports, ttl 4, portsRangeNumber 2
|
|
// sender, portsRandomNumber 1000, SendDelayMs: 2000 | receiver, listen 256 ports, portsRangeNumber 2
|
|
mode4Behaviors = []lo.Tuple2[RecommandBehavior, RecommandBehavior]{
|
|
lo.T2(
|
|
RecommandBehavior{Role: DetectRoleSender, PortsRandomNumber: 1000, SendDelayMs: 3000},
|
|
RecommandBehavior{Role: DetectRoleReceiver, ListenRandomPorts: 256, TTL: 7, PortsRangeNumber: 2},
|
|
),
|
|
lo.T2(
|
|
RecommandBehavior{Role: DetectRoleSender, PortsRandomNumber: 1000, SendDelayMs: 3000},
|
|
RecommandBehavior{Role: DetectRoleReceiver, ListenRandomPorts: 256, TTL: 4, PortsRangeNumber: 2},
|
|
),
|
|
lo.T2(
|
|
RecommandBehavior{Role: DetectRoleSender, PortsRandomNumber: 1000, SendDelayMs: 3000},
|
|
RecommandBehavior{Role: DetectRoleReceiver, ListenRandomPorts: 256, PortsRangeNumber: 2},
|
|
),
|
|
}
|
|
)
|
|
|
|
func getBehaviorByMode(mode int) []lo.Tuple2[RecommandBehavior, RecommandBehavior] {
|
|
switch mode {
|
|
case 0:
|
|
return mode0Behaviors
|
|
case 1:
|
|
return mode1Behaviors
|
|
case 2:
|
|
return mode2Behaviors
|
|
case 3:
|
|
return mode3Behaviors
|
|
case 4:
|
|
return mode4Behaviors
|
|
}
|
|
// default
|
|
return mode0Behaviors
|
|
}
|
|
|
|
func getBehaviorByModeAndIndex(mode int, index int) (RecommandBehavior, RecommandBehavior) {
|
|
behaviors := getBehaviorByMode(mode)
|
|
if index >= len(behaviors) {
|
|
return RecommandBehavior{}, RecommandBehavior{}
|
|
}
|
|
return behaviors[index].A, behaviors[index].B
|
|
}
|
|
|
|
func getBehaviorScoresByMode(mode int, defaultScore int) []*BehaviorScore {
|
|
return getBehaviorScoresByMode2(mode, defaultScore, defaultScore)
|
|
}
|
|
|
|
func getBehaviorScoresByMode2(mode int, senderScore, receiverScore int) []*BehaviorScore {
|
|
behaviors := getBehaviorByMode(mode)
|
|
scores := make([]*BehaviorScore, 0, len(behaviors))
|
|
for i := 0; i < len(behaviors); i++ {
|
|
score := receiverScore
|
|
if behaviors[i].A.Role == DetectRoleSender {
|
|
score = senderScore
|
|
}
|
|
scores = append(scores, &BehaviorScore{Mode: mode, Index: i, Score: score})
|
|
}
|
|
return scores
|
|
}
|
|
|
|
type RecommandBehavior struct {
|
|
Role string
|
|
TTL int
|
|
SendDelayMs int
|
|
PortsRangeNumber int
|
|
PortsRandomNumber int
|
|
ListenRandomPorts int
|
|
}
|
|
|
|
type MakeHoleRecords struct {
|
|
mu sync.Mutex
|
|
scores []*BehaviorScore
|
|
LastUpdateTime time.Time
|
|
}
|
|
|
|
func NewMakeHoleRecords(c, v *NatFeature) *MakeHoleRecords {
|
|
scores := []*BehaviorScore{}
|
|
easyCount, hardCount, portsChangedRegularCount := ClassifyFeatureCount([]*NatFeature{c, v})
|
|
appendMode0 := func() {
|
|
switch {
|
|
case c.PublicNetwork:
|
|
scores = append(scores, getBehaviorScoresByMode2(DetectMode0, 0, 1)...)
|
|
case v.PublicNetwork:
|
|
scores = append(scores, getBehaviorScoresByMode2(DetectMode0, 1, 0)...)
|
|
default:
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode0, 0)...)
|
|
}
|
|
}
|
|
|
|
switch {
|
|
case easyCount == 2:
|
|
appendMode0()
|
|
case hardCount == 1 && portsChangedRegularCount == 1:
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode1, 0)...)
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode2, 0)...)
|
|
appendMode0()
|
|
case hardCount == 1 && portsChangedRegularCount == 0:
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode2, 0)...)
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode1, 0)...)
|
|
appendMode0()
|
|
case hardCount == 2 && portsChangedRegularCount == 2:
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode3, 0)...)
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode4, 0)...)
|
|
case hardCount == 2 && portsChangedRegularCount == 1:
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode4, 0)...)
|
|
default:
|
|
// hard to make hole, just trying it out.
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode0, 1)...)
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode1, 1)...)
|
|
scores = append(scores, getBehaviorScoresByMode(DetectMode3, 1)...)
|
|
}
|
|
return &MakeHoleRecords{scores: scores, LastUpdateTime: time.Now()}
|
|
}
|
|
|
|
func (mhr *MakeHoleRecords) ReportSuccess(mode int, index int) {
|
|
mhr.mu.Lock()
|
|
defer mhr.mu.Unlock()
|
|
mhr.LastUpdateTime = time.Now()
|
|
for i := range mhr.scores {
|
|
score := mhr.scores[i]
|
|
if score.Mode != mode || score.Index != index {
|
|
continue
|
|
}
|
|
|
|
score.Score += 2
|
|
score.Score = lo.Min([]int{score.Score, 10})
|
|
return
|
|
}
|
|
}
|
|
|
|
func (mhr *MakeHoleRecords) Recommand() (mode, index int) {
|
|
mhr.mu.Lock()
|
|
defer mhr.mu.Unlock()
|
|
|
|
maxScore := lo.MaxBy(mhr.scores, func(item, max *BehaviorScore) bool {
|
|
return item.Score > max.Score
|
|
})
|
|
if maxScore == nil {
|
|
return 0, 0
|
|
}
|
|
maxScore.Score--
|
|
mhr.LastUpdateTime = time.Now()
|
|
return maxScore.Mode, maxScore.Index
|
|
}
|
|
|
|
type BehaviorScore struct {
|
|
Mode int
|
|
Index int
|
|
// between -10 and 10
|
|
Score int
|
|
}
|
|
|
|
type Analyzer struct {
|
|
// key is client ip + visitor ip
|
|
records map[string]*MakeHoleRecords
|
|
dataReserveDuration time.Duration
|
|
|
|
mu sync.Mutex
|
|
}
|
|
|
|
func NewAnalyzer(dataReserveDuration time.Duration) *Analyzer {
|
|
return &Analyzer{
|
|
records: make(map[string]*MakeHoleRecords),
|
|
dataReserveDuration: dataReserveDuration,
|
|
}
|
|
}
|
|
|
|
func (a *Analyzer) GetRecommandBehaviors(key string, c, v *NatFeature) (mode, index int, _ RecommandBehavior, _ RecommandBehavior) {
|
|
a.mu.Lock()
|
|
records, ok := a.records[key]
|
|
if !ok {
|
|
records = NewMakeHoleRecords(c, v)
|
|
a.records[key] = records
|
|
}
|
|
a.mu.Unlock()
|
|
|
|
mode, index = records.Recommand()
|
|
cBehavior, vBehavior := getBehaviorByModeAndIndex(mode, index)
|
|
|
|
switch mode {
|
|
case DetectMode1:
|
|
// HardNAT is always the sender
|
|
if c.NatType == EasyNAT {
|
|
cBehavior, vBehavior = vBehavior, cBehavior
|
|
}
|
|
case DetectMode2:
|
|
// HardNAT is always the receiver
|
|
if c.NatType == HardNAT {
|
|
cBehavior, vBehavior = vBehavior, cBehavior
|
|
}
|
|
case DetectMode4:
|
|
// Regular ports changes is always the sender
|
|
if !c.RegularPortsChange {
|
|
cBehavior, vBehavior = vBehavior, cBehavior
|
|
}
|
|
}
|
|
return mode, index, cBehavior, vBehavior
|
|
}
|
|
|
|
func (a *Analyzer) ReportSuccess(key string, mode, index int) {
|
|
a.mu.Lock()
|
|
records, ok := a.records[key]
|
|
a.mu.Unlock()
|
|
if !ok {
|
|
return
|
|
}
|
|
records.ReportSuccess(mode, index)
|
|
}
|
|
|
|
func (a *Analyzer) Clean() (int, int) {
|
|
now := time.Now()
|
|
total := 0
|
|
count := 0
|
|
|
|
// cleanup 10w records may take 5ms
|
|
a.mu.Lock()
|
|
defer a.mu.Unlock()
|
|
total = len(a.records)
|
|
// clean up records that have not been used for a period of time.
|
|
for key, records := range a.records {
|
|
if now.Sub(records.LastUpdateTime) > a.dataReserveDuration {
|
|
delete(a.records, key)
|
|
count++
|
|
}
|
|
}
|
|
return count, total
|
|
}
|