-
Notifications
You must be signed in to change notification settings - Fork 826
/
default.go
468 lines (419 loc) · 13.3 KB
/
default.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
package mydispatcher
//go:generate go run github.com/xtls/xray-core/common/errors/errorgen
import (
"context"
"fmt"
"strings"
"sync"
"time"
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/common/log"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/protocol"
"github.com/xtls/xray-core/common/session"
"github.com/xtls/xray-core/core"
"github.com/xtls/xray-core/features/dns"
"github.com/xtls/xray-core/features/outbound"
"github.com/xtls/xray-core/features/policy"
"github.com/xtls/xray-core/features/routing"
routingSession "github.com/xtls/xray-core/features/routing/session"
"github.com/xtls/xray-core/features/stats"
"github.com/xtls/xray-core/transport"
"github.com/xtls/xray-core/transport/pipe"
"github.com/XrayR-project/XrayR/common/limiter"
"github.com/XrayR-project/XrayR/common/rule"
)
var errSniffingTimeout = newError("timeout on sniffing")
type cachedReader struct {
sync.Mutex
reader *pipe.Reader
cache buf.MultiBuffer
}
func (r *cachedReader) Cache(b *buf.Buffer) {
mb, _ := r.reader.ReadMultiBufferTimeout(time.Millisecond * 100)
r.Lock()
if !mb.IsEmpty() {
r.cache, _ = buf.MergeMulti(r.cache, mb)
}
b.Clear()
rawBytes := b.Extend(buf.Size)
n := r.cache.Copy(rawBytes)
b.Resize(0, int32(n))
r.Unlock()
}
func (r *cachedReader) readInternal() buf.MultiBuffer {
r.Lock()
defer r.Unlock()
if r.cache != nil && !r.cache.IsEmpty() {
mb := r.cache
r.cache = nil
return mb
}
return nil
}
func (r *cachedReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
mb := r.readInternal()
if mb != nil {
return mb, nil
}
return r.reader.ReadMultiBuffer()
}
func (r *cachedReader) ReadMultiBufferTimeout(timeout time.Duration) (buf.MultiBuffer, error) {
mb := r.readInternal()
if mb != nil {
return mb, nil
}
return r.reader.ReadMultiBufferTimeout(timeout)
}
func (r *cachedReader) Interrupt() {
r.Lock()
if r.cache != nil {
r.cache = buf.ReleaseMulti(r.cache)
}
r.Unlock()
r.reader.Interrupt()
}
// DefaultDispatcher is a default implementation of Dispatcher.
type DefaultDispatcher struct {
ohm outbound.Manager
router routing.Router
policy policy.Manager
stats stats.Manager
dns dns.Client
fdns dns.FakeDNSEngine
Limiter *limiter.Limiter
RuleManager *rule.Manager
}
func init() {
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
d := new(DefaultDispatcher)
if err := core.RequireFeatures(ctx, func(om outbound.Manager, router routing.Router, pm policy.Manager, sm stats.Manager, dc dns.Client) error {
core.RequireFeatures(ctx, func(fdns dns.FakeDNSEngine) {
d.fdns = fdns
})
return d.Init(config.(*Config), om, router, pm, sm, dc)
}); err != nil {
return nil, err
}
return d, nil
}))
}
// Init initializes DefaultDispatcher.
func (d *DefaultDispatcher) Init(config *Config, om outbound.Manager, router routing.Router, pm policy.Manager, sm stats.Manager, dns dns.Client) error {
d.ohm = om
d.router = router
d.policy = pm
d.stats = sm
d.Limiter = limiter.New()
d.RuleManager = rule.New()
d.dns = dns
return nil
}
// Type implements common.HasType.
func (*DefaultDispatcher) Type() interface{} {
return routing.DispatcherType()
}
// Start implements common.Runnable.
func (*DefaultDispatcher) Start() error {
return nil
}
// Close implements common.Closable.
func (*DefaultDispatcher) Close() error {
return nil
}
func (d *DefaultDispatcher) getLink(ctx context.Context, network net.Network, sniffing session.SniffingRequest) (*transport.Link, *transport.Link, error) {
opt := pipe.OptionsFromContext(ctx)
uplinkReader, uplinkWriter := pipe.New(opt...)
downlinkReader, downlinkWriter := pipe.New(opt...)
inboundLink := &transport.Link{
Reader: downlinkReader,
Writer: uplinkWriter,
}
outboundLink := &transport.Link{
Reader: uplinkReader,
Writer: downlinkWriter,
}
sessionInbound := session.InboundFromContext(ctx)
var user *protocol.MemoryUser
if sessionInbound != nil {
user = sessionInbound.User
}
if user != nil && len(user.Email) > 0 {
// Speed Limit and Device Limit
bucket, ok, reject := d.Limiter.GetUserBucket(sessionInbound.Tag, user.Email, sessionInbound.Source.Address.IP().String())
if reject {
newError("Devices reach the limit: ", user.Email).AtWarning().WriteToLog()
common.Close(outboundLink.Writer)
common.Close(inboundLink.Writer)
common.Interrupt(outboundLink.Reader)
common.Interrupt(inboundLink.Reader)
return nil, nil, newError("Devices reach the limit: ", user.Email)
}
if ok {
inboundLink.Writer = d.Limiter.RateWriter(inboundLink.Writer, bucket)
outboundLink.Writer = d.Limiter.RateWriter(outboundLink.Writer, bucket)
}
p := d.policy.ForLevel(user.Level)
if p.Stats.UserUplink {
name := "user>>>" + user.Email + ">>>traffic>>>uplink"
if c, _ := stats.GetOrRegisterCounter(d.stats, name); c != nil {
inboundLink.Writer = &SizeStatWriter{
Counter: c,
Writer: inboundLink.Writer,
}
}
}
if p.Stats.UserDownlink {
name := "user>>>" + user.Email + ">>>traffic>>>downlink"
if c, _ := stats.GetOrRegisterCounter(d.stats, name); c != nil {
outboundLink.Writer = &SizeStatWriter{
Counter: c,
Writer: outboundLink.Writer,
}
}
}
}
return inboundLink, outboundLink, nil
}
func (d *DefaultDispatcher) shouldOverride(ctx context.Context, result SniffResult, request session.SniffingRequest, destination net.Destination) bool {
domain := result.Domain()
for _, d := range request.ExcludeForDomain {
if strings.ToLower(domain) == d {
return false
}
}
protocolString := result.Protocol()
if resComp, ok := result.(SnifferResultComposite); ok {
protocolString = resComp.ProtocolForDomainResult()
}
for _, p := range request.OverrideDestinationForProtocol {
if strings.HasPrefix(protocolString, p) {
return true
}
if fkr0, ok := d.fdns.(dns.FakeDNSEngineRev0); ok && protocolString != "bittorrent" && p == "fakedns" &&
destination.Address.Family().IsIP() && fkr0.IsIPInIPPool(destination.Address) {
newError("Using sniffer ", protocolString, " since the fake DNS missed").WriteToLog(session.ExportIDToError(ctx))
return true
}
if resultSubset, ok := result.(SnifferIsProtoSubsetOf); ok {
if resultSubset.IsProtoSubsetOf(p) {
return true
}
}
}
return false
}
// Dispatch implements routing.Dispatcher.
func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destination) (*transport.Link, error) {
if !destination.IsValid() {
panic("Dispatcher: Invalid destination.")
}
ob := &session.Outbound{
Target: destination,
}
ctx = session.ContextWithOutbound(ctx, ob)
content := session.ContentFromContext(ctx)
if content == nil {
content = new(session.Content)
ctx = session.ContextWithContent(ctx, content)
}
sniffingRequest := content.SniffingRequest
inbound, outbound, err := d.getLink(ctx, destination.Network, sniffingRequest)
if err != nil {
return nil, err
}
if !sniffingRequest.Enabled {
go d.routedDispatch(ctx, outbound, destination)
} else {
go func() {
cReader := &cachedReader{
reader: outbound.Reader.(*pipe.Reader),
}
outbound.Reader = cReader
result, err := sniffer(ctx, cReader, sniffingRequest.MetadataOnly, destination.Network)
if err == nil {
content.Protocol = result.Protocol()
}
if err == nil && d.shouldOverride(ctx, result, sniffingRequest, destination) {
domain := result.Domain()
newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
destination.Address = net.ParseAddress(domain)
if sniffingRequest.RouteOnly && result.Protocol() != "fakedns" {
ob.RouteTarget = destination
} else {
ob.Target = destination
}
}
d.routedDispatch(ctx, outbound, destination)
}()
}
return inbound, nil
}
// DispatchLink implements routing.Dispatcher.
func (d *DefaultDispatcher) DispatchLink(ctx context.Context, destination net.Destination, outbound *transport.Link) error {
if !destination.IsValid() {
return newError("Dispatcher: Invalid destination.")
}
ob := &session.Outbound{
Target: destination,
}
ctx = session.ContextWithOutbound(ctx, ob)
content := session.ContentFromContext(ctx)
if content == nil {
content = new(session.Content)
ctx = session.ContextWithContent(ctx, content)
}
sniffingRequest := content.SniffingRequest
if !sniffingRequest.Enabled {
go d.routedDispatch(ctx, outbound, destination)
} else {
go func() {
cReader := &cachedReader{
reader: outbound.Reader.(*pipe.Reader),
}
outbound.Reader = cReader
result, err := sniffer(ctx, cReader, sniffingRequest.MetadataOnly, destination.Network)
if err == nil {
content.Protocol = result.Protocol()
}
if err == nil && d.shouldOverride(ctx, result, sniffingRequest, destination) {
domain := result.Domain()
newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
destination.Address = net.ParseAddress(domain)
if sniffingRequest.RouteOnly && result.Protocol() != "fakedns" {
ob.RouteTarget = destination
} else {
ob.Target = destination
}
}
d.routedDispatch(ctx, outbound, destination)
}()
}
return nil
}
func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool, network net.Network) (SniffResult, error) {
payload := buf.New()
defer payload.Release()
sniffer := NewSniffer(ctx)
metaresult, metadataErr := sniffer.SniffMetadata(ctx)
if metadataOnly {
return metaresult, metadataErr
}
contentResult, contentErr := func() (SniffResult, error) {
totalAttempt := 0
for {
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
totalAttempt++
if totalAttempt > 2 {
return nil, errSniffingTimeout
}
cReader.Cache(payload)
if !payload.IsEmpty() {
result, err := sniffer.Sniff(ctx, payload.Bytes(), network)
if err != common.ErrNoClue {
return result, err
}
}
if payload.IsFull() {
return nil, errUnknownContent
}
}
}
}()
if contentErr != nil && metadataErr == nil {
return metaresult, nil
}
if contentErr == nil && metadataErr == nil {
return CompositeResult(metaresult, contentResult), nil
}
return contentResult, contentErr
}
func (d *DefaultDispatcher) routedDispatch(ctx context.Context, link *transport.Link, destination net.Destination) {
ob := session.OutboundFromContext(ctx)
if hosts, ok := d.dns.(dns.HostsLookup); ok && destination.Address.Family().IsDomain() {
proxied := hosts.LookupHosts(ob.Target.String())
if proxied != nil {
ro := ob.RouteTarget == destination
destination.Address = *proxied
if ro {
ob.RouteTarget = destination
} else {
ob.Target = destination
}
}
}
var handler outbound.Handler
// Check if domain and protocol hit the rule
sessionInbound := session.InboundFromContext(ctx)
// Whether the inbound connection contains a user
if sessionInbound.User != nil {
if d.RuleManager.Detect(sessionInbound.Tag, destination.String(), sessionInbound.User.Email) {
newError(fmt.Sprintf("User %s access %s reject by rule", sessionInbound.User.Email, destination.String())).AtError().WriteToLog()
newError("destination is reject by rule")
common.Close(link.Writer)
common.Interrupt(link.Reader)
return
}
}
routingLink := routingSession.AsRoutingContext(ctx)
inTag := routingLink.GetInboundTag()
isPickRoute := 0
if forcedOutboundTag := session.GetForcedOutboundTagFromContext(ctx); forcedOutboundTag != "" {
ctx = session.SetForcedOutboundTagToContext(ctx, "")
if h := d.ohm.GetHandler(forcedOutboundTag); h != nil {
isPickRoute = 1
newError("taking platform initialized detour [", forcedOutboundTag, "] for [", destination, "]").WriteToLog(session.ExportIDToError(ctx))
handler = h
} else {
newError("non existing tag for platform initialized detour: ", forcedOutboundTag).AtError().WriteToLog(session.ExportIDToError(ctx))
common.Close(link.Writer)
common.Interrupt(link.Reader)
return
}
} else if d.router != nil {
if route, err := d.router.PickRoute(routingLink); err == nil {
outTag := route.GetOutboundTag()
if h := d.ohm.GetHandler(outTag); h != nil {
isPickRoute = 2
newError("taking detour [", outTag, "] for [", destination, "]").WriteToLog(session.ExportIDToError(ctx))
handler = h
} else {
newError("non existing outTag: ", outTag).AtWarning().WriteToLog(session.ExportIDToError(ctx))
}
} else {
newError("default route for ", destination).WriteToLog(session.ExportIDToError(ctx))
}
}
if handler == nil {
handler = d.ohm.GetHandler(inTag) // Default outbound handler tag should be as same as the inbound tag
}
// If there is no outbound with tag as same as the inbound tag
if handler == nil {
handler = d.ohm.GetDefaultHandler()
}
if handler == nil {
newError("default outbound handler not exist").WriteToLog(session.ExportIDToError(ctx))
common.Close(link.Writer)
common.Interrupt(link.Reader)
return
}
if accessMessage := log.AccessMessageFromContext(ctx); accessMessage != nil {
if tag := handler.Tag(); tag != "" {
if inTag == "" {
accessMessage.Detour = tag
} else if isPickRoute == 1 {
accessMessage.Detour = inTag + " ==> " + tag
} else if isPickRoute == 2 {
accessMessage.Detour = inTag + " -> " + tag
} else {
accessMessage.Detour = inTag + " >> " + tag
}
}
log.Record(accessMessage)
}
handler.Dispatch(ctx, link)
}