source: code/trunk/user.go@ 768

Last change on this file since 768 was 768, checked in by contact, 3 years ago

Drop user.forEachNetwork

It's a trivial for loop.
File size: 25.3 KB
Line 
1package soju
2
3import (
4 "context"
5 "crypto/sha256"
6 "encoding/binary"
7 "encoding/hex"
8 "fmt"
9 "math/big"
10 "net"
11 "time"
12
13 "gopkg.in/irc.v3"
14)
15
16type event interface{}
17
18type eventUpstreamMessage struct {
19 msg *irc.Message
20 uc *upstreamConn
21}
22
23type eventUpstreamConnectionError struct {
24 net *network
25 err error
26}
27
28type eventUpstreamConnected struct {
29 uc *upstreamConn
30}
31
32type eventUpstreamDisconnected struct {
33 uc *upstreamConn
34}
35
36type eventUpstreamError struct {
37 uc *upstreamConn
38 err error
39}
40
41type eventDownstreamMessage struct {
42 msg *irc.Message
43 dc *downstreamConn
44}
45
46type eventDownstreamConnected struct {
47 dc *downstreamConn
48}
49
50type eventDownstreamDisconnected struct {
51 dc *downstreamConn
52}
53
54type eventChannelDetach struct {
55 uc *upstreamConn
56 name string
57}
58
59type eventBroadcast struct {
60 msg *irc.Message
61}
62
63type eventStop struct{}
64
65type eventUserUpdate struct {
66 password *string
67 admin *bool
68 done chan error
69}
70
71type deliveredClientMap map[string]string // client name -> msg ID
72
73type deliveredStore struct {
74 m deliveredCasemapMap
75}
76
77func newDeliveredStore() deliveredStore {
78 return deliveredStore{deliveredCasemapMap{newCasemapMap(0)}}
79}
80
81func (ds deliveredStore) HasTarget(target string) bool {
82 return ds.m.Value(target) != nil
83}
84
85func (ds deliveredStore) LoadID(target, clientName string) string {
86 clients := ds.m.Value(target)
87 if clients == nil {
88 return ""
89 }
90 return clients[clientName]
91}
92
93func (ds deliveredStore) StoreID(target, clientName, msgID string) {
94 clients := ds.m.Value(target)
95 if clients == nil {
96 clients = make(deliveredClientMap)
97 ds.m.SetValue(target, clients)
98 }
99 clients[clientName] = msgID
100}
101
102func (ds deliveredStore) ForEachTarget(f func(target string)) {
103 for _, entry := range ds.m.innerMap {
104 f(entry.originalKey)
105 }
106}
107
108func (ds deliveredStore) ForEachClient(f func(clientName string)) {
109 clients := make(map[string]struct{})
110 for _, entry := range ds.m.innerMap {
111 delivered := entry.value.(deliveredClientMap)
112 for clientName := range delivered {
113 clients[clientName] = struct{}{}
114 }
115 }
116
117 for clientName := range clients {
118 f(clientName)
119 }
120}
121
122type network struct {
123 Network
124 user *user
125 logger Logger
126 stopped chan struct{}
127
128 conn *upstreamConn
129 channels channelCasemapMap
130 delivered deliveredStore
131 lastError error
132 casemap casemapping
133}
134
135func newNetwork(user *user, record *Network, channels []Channel) *network {
136 logger := &prefixLogger{user.logger, fmt.Sprintf("network %q: ", record.GetName())}
137
138 m := channelCasemapMap{newCasemapMap(0)}
139 for _, ch := range channels {
140 ch := ch
141 m.SetValue(ch.Name, &ch)
142 }
143
144 return &network{
145 Network: *record,
146 user: user,
147 logger: logger,
148 stopped: make(chan struct{}),
149 channels: m,
150 delivered: newDeliveredStore(),
151 casemap: casemapRFC1459,
152 }
153}
154
155func (net *network) forEachDownstream(f func(*downstreamConn)) {
156 net.user.forEachDownstream(func(dc *downstreamConn) {
157 if dc.network == nil && !dc.isMultiUpstream {
158 return
159 }
160 if dc.network != nil && dc.network != net {
161 return
162 }
163 f(dc)
164 })
165}
166
167func (net *network) isStopped() bool {
168 select {
169 case <-net.stopped:
170 return true
171 default:
172 return false
173 }
174}
175
176func userIdent(u *User) string {
177 // The ident is a string we will send to upstream servers in clear-text.
178 // For privacy reasons, make sure it doesn't expose any meaningful user
179 // metadata. We just use the base64-encoded hashed ID, so that people don't
180 // start relying on the string being an integer or following a pattern.
181 var b [64]byte
182 binary.LittleEndian.PutUint64(b[:], uint64(u.ID))
183 h := sha256.Sum256(b[:])
184 return hex.EncodeToString(h[:16])
185}
186
187func (net *network) run() {
188 if !net.Enabled {
189 return
190 }
191
192 var lastTry time.Time
193 backoff := newBackoffer(retryConnectMinDelay, retryConnectMaxDelay, retryConnectJitter)
194 for {
195 if net.isStopped() {
196 return
197 }
198
199 delay := backoff.Next() - time.Now().Sub(lastTry)
200 if delay > 0 {
201 net.logger.Printf("waiting %v before trying to reconnect to %q", delay.Truncate(time.Second), net.Addr)
202 time.Sleep(delay)
203 }
204 lastTry = time.Now()
205
206 net.user.srv.metrics.upstreams.Add(1)
207
208 uc, err := connectToUpstream(context.TODO(), net)
209 if err != nil {
210 net.logger.Printf("failed to connect to upstream server %q: %v", net.Addr, err)
211 net.user.events <- eventUpstreamConnectionError{net, fmt.Errorf("failed to connect: %v", err)}
212 net.user.srv.metrics.upstreams.Add(-1)
213 net.user.srv.metrics.upstreamConnectErrorsTotal.Inc()
214 continue
215 }
216
217 if net.user.srv.Identd != nil {
218 net.user.srv.Identd.Store(uc.RemoteAddr().String(), uc.LocalAddr().String(), userIdent(&net.user.User))
219 }
220
221 uc.register()
222 if err := uc.runUntilRegistered(); err != nil {
223 text := err.Error()
224 temp := true
225 if regErr, ok := err.(registrationError); ok {
226 text = regErr.Reason()
227 temp = regErr.Temporary()
228 }
229 uc.logger.Printf("failed to register: %v", text)
230 net.user.events <- eventUpstreamConnectionError{net, fmt.Errorf("failed to register: %v", text)}
231 uc.Close()
232 net.user.srv.metrics.upstreams.Add(-1)
233 net.user.srv.metrics.upstreamConnectErrorsTotal.Inc()
234 if !temp {
235 return
236 }
237 continue
238 }
239
240 // TODO: this is racy with net.stopped. If the network is stopped
241 // before the user goroutine receives eventUpstreamConnected, the
242 // connection won't be closed.
243 net.user.events <- eventUpstreamConnected{uc}
244 if err := uc.readMessages(net.user.events); err != nil {
245 uc.logger.Printf("failed to handle messages: %v", err)
246 net.user.events <- eventUpstreamError{uc, fmt.Errorf("failed to handle messages: %v", err)}
247 }
248 uc.Close()
249 net.user.events <- eventUpstreamDisconnected{uc}
250
251 if net.user.srv.Identd != nil {
252 net.user.srv.Identd.Delete(uc.RemoteAddr().String(), uc.LocalAddr().String())
253 }
254
255 net.user.srv.metrics.upstreams.Add(-1)
256 backoff.Reset()
257 }
258}
259
260func (net *network) stop() {
261 if !net.isStopped() {
262 close(net.stopped)
263 }
264
265 if net.conn != nil {
266 net.conn.Close()
267 }
268}
269
270func (net *network) detach(ch *Channel) {
271 if ch.Detached {
272 return
273 }
274
275 net.logger.Printf("detaching channel %q", ch.Name)
276
277 ch.Detached = true
278
279 if net.user.msgStore != nil {
280 nameCM := net.casemap(ch.Name)
281 lastID, err := net.user.msgStore.LastMsgID(&net.Network, nameCM, time.Now())
282 if err != nil {
283 net.logger.Printf("failed to get last message ID for channel %q: %v", ch.Name, err)
284 }
285 ch.DetachedInternalMsgID = lastID
286 }
287
288 if net.conn != nil {
289 uch := net.conn.channels.Value(ch.Name)
290 if uch != nil {
291 uch.updateAutoDetach(0)
292 }
293 }
294
295 net.forEachDownstream(func(dc *downstreamConn) {
296 dc.SendMessage(&irc.Message{
297 Prefix: dc.prefix(),
298 Command: "PART",
299 Params: []string{dc.marshalEntity(net, ch.Name), "Detach"},
300 })
301 })
302}
303
304func (net *network) attach(ch *Channel) {
305 if !ch.Detached {
306 return
307 }
308
309 net.logger.Printf("attaching channel %q", ch.Name)
310
311 detachedMsgID := ch.DetachedInternalMsgID
312 ch.Detached = false
313 ch.DetachedInternalMsgID = ""
314
315 var uch *upstreamChannel
316 if net.conn != nil {
317 uch = net.conn.channels.Value(ch.Name)
318
319 net.conn.updateChannelAutoDetach(ch.Name)
320 }
321
322 net.forEachDownstream(func(dc *downstreamConn) {
323 dc.SendMessage(&irc.Message{
324 Prefix: dc.prefix(),
325 Command: "JOIN",
326 Params: []string{dc.marshalEntity(net, ch.Name)},
327 })
328
329 if uch != nil {
330 forwardChannel(dc, uch)
331 }
332
333 if detachedMsgID != "" {
334 dc.sendTargetBacklog(context.TODO(), net, ch.Name, detachedMsgID)
335 }
336 })
337}
338
339func (net *network) deleteChannel(ctx context.Context, name string) error {
340 ch := net.channels.Value(name)
341 if ch == nil {
342 return fmt.Errorf("unknown channel %q", name)
343 }
344 if net.conn != nil {
345 uch := net.conn.channels.Value(ch.Name)
346 if uch != nil {
347 uch.updateAutoDetach(0)
348 }
349 }
350
351 if err := net.user.srv.db.DeleteChannel(ctx, ch.ID); err != nil {
352 return err
353 }
354 net.channels.Delete(name)
355 return nil
356}
357
358func (net *network) updateCasemapping(newCasemap casemapping) {
359 net.casemap = newCasemap
360 net.channels.SetCasemapping(newCasemap)
361 net.delivered.m.SetCasemapping(newCasemap)
362 if uc := net.conn; uc != nil {
363 uc.channels.SetCasemapping(newCasemap)
364 for _, entry := range uc.channels.innerMap {
365 uch := entry.value.(*upstreamChannel)
366 uch.Members.SetCasemapping(newCasemap)
367 }
368 uc.monitored.SetCasemapping(newCasemap)
369 }
370 net.forEachDownstream(func(dc *downstreamConn) {
371 dc.monitored.SetCasemapping(newCasemap)
372 })
373}
374
375func (net *network) storeClientDeliveryReceipts(ctx context.Context, clientName string) {
376 if !net.user.hasPersistentMsgStore() {
377 return
378 }
379
380 var receipts []DeliveryReceipt
381 net.delivered.ForEachTarget(func(target string) {
382 msgID := net.delivered.LoadID(target, clientName)
383 if msgID == "" {
384 return
385 }
386 receipts = append(receipts, DeliveryReceipt{
387 Target: target,
388 InternalMsgID: msgID,
389 })
390 })
391
392 if err := net.user.srv.db.StoreClientDeliveryReceipts(ctx, net.ID, clientName, receipts); err != nil {
393 net.logger.Printf("failed to store delivery receipts for client %q: %v", clientName, err)
394 }
395}
396
397func (net *network) isHighlight(msg *irc.Message) bool {
398 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
399 return false
400 }
401
402 text := msg.Params[1]
403
404 nick := net.Nick
405 if net.conn != nil {
406 nick = net.conn.nick
407 }
408
409 // TODO: use case-mapping aware comparison here
410 return msg.Prefix.Name != nick && isHighlight(text, nick)
411}
412
413func (net *network) detachedMessageNeedsRelay(ch *Channel, msg *irc.Message) bool {
414 highlight := net.isHighlight(msg)
415 return ch.RelayDetached == FilterMessage || ((ch.RelayDetached == FilterHighlight || ch.RelayDetached == FilterDefault) && highlight)
416}
417
418func (net *network) autoSaveSASLPlain(ctx context.Context, username, password string) {
419 // User may have e.g. EXTERNAL mechanism configured. We do not want to
420 // automatically erase the key pair or any other credentials.
421 if net.SASL.Mechanism != "" && net.SASL.Mechanism != "PLAIN" {
422 return
423 }
424
425 net.logger.Printf("auto-saving SASL PLAIN credentials with username %q", username)
426 net.SASL.Mechanism = "PLAIN"
427 net.SASL.Plain.Username = username
428 net.SASL.Plain.Password = password
429 if err := net.user.srv.db.StoreNetwork(ctx, net.user.ID, &net.Network); err != nil {
430 net.logger.Printf("failed to save SASL PLAIN credentials: %v", err)
431 }
432}
433
434type user struct {
435 User
436 srv *Server
437 logger Logger
438
439 events chan event
440 done chan struct{}
441
442 networks []*network
443 downstreamConns []*downstreamConn
444 msgStore messageStore
445}
446
447func newUser(srv *Server, record *User) *user {
448 logger := &prefixLogger{srv.Logger, fmt.Sprintf("user %q: ", record.Username)}
449
450 var msgStore messageStore
451 if logPath := srv.Config().LogPath; logPath != "" {
452 msgStore = newFSMessageStore(logPath, record.Username)
453 } else {
454 msgStore = newMemoryMessageStore()
455 }
456
457 return &user{
458 User: *record,
459 srv: srv,
460 logger: logger,
461 events: make(chan event, 64),
462 done: make(chan struct{}),
463 msgStore: msgStore,
464 }
465}
466
467func (u *user) forEachUpstream(f func(uc *upstreamConn)) {
468 for _, network := range u.networks {
469 if network.conn == nil {
470 continue
471 }
472 f(network.conn)
473 }
474}
475
476func (u *user) forEachDownstream(f func(dc *downstreamConn)) {
477 for _, dc := range u.downstreamConns {
478 f(dc)
479 }
480}
481
482func (u *user) getNetwork(name string) *network {
483 for _, network := range u.networks {
484 if network.Addr == name {
485 return network
486 }
487 if network.Name != "" && network.Name == name {
488 return network
489 }
490 }
491 return nil
492}
493
494func (u *user) getNetworkByID(id int64) *network {
495 for _, net := range u.networks {
496 if net.ID == id {
497 return net
498 }
499 }
500 return nil
501}
502
503func (u *user) run() {
504 defer func() {
505 if u.msgStore != nil {
506 if err := u.msgStore.Close(); err != nil {
507 u.logger.Printf("failed to close message store for user %q: %v", u.Username, err)
508 }
509 }
510 close(u.done)
511 }()
512
513 networks, err := u.srv.db.ListNetworks(context.TODO(), u.ID)
514 if err != nil {
515 u.logger.Printf("failed to list networks for user %q: %v", u.Username, err)
516 return
517 }
518
519 for _, record := range networks {
520 record := record
521 channels, err := u.srv.db.ListChannels(context.TODO(), record.ID)
522 if err != nil {
523 u.logger.Printf("failed to list channels for user %q, network %q: %v", u.Username, record.GetName(), err)
524 continue
525 }
526
527 network := newNetwork(u, &record, channels)
528 u.networks = append(u.networks, network)
529
530 if u.hasPersistentMsgStore() {
531 receipts, err := u.srv.db.ListDeliveryReceipts(context.TODO(), record.ID)
532 if err != nil {
533 u.logger.Printf("failed to load delivery receipts for user %q, network %q: %v", u.Username, network.GetName(), err)
534 return
535 }
536
537 for _, rcpt := range receipts {
538 network.delivered.StoreID(rcpt.Target, rcpt.Client, rcpt.InternalMsgID)
539 }
540 }
541
542 go network.run()
543 }
544
545 for e := range u.events {
546 switch e := e.(type) {
547 case eventUpstreamConnected:
548 uc := e.uc
549
550 uc.network.conn = uc
551
552 uc.updateAway()
553 uc.updateMonitor()
554
555 netIDStr := fmt.Sprintf("%v", uc.network.ID)
556 uc.forEachDownstream(func(dc *downstreamConn) {
557 dc.updateSupportedCaps()
558
559 if !dc.caps["soju.im/bouncer-networks"] {
560 sendServiceNOTICE(dc, fmt.Sprintf("connected to %s", uc.network.GetName()))
561 }
562
563 dc.updateNick()
564 dc.updateRealname()
565 dc.updateAccount()
566 })
567 u.forEachDownstream(func(dc *downstreamConn) {
568 if dc.caps["soju.im/bouncer-networks-notify"] {
569 dc.SendMessage(&irc.Message{
570 Prefix: dc.srv.prefix(),
571 Command: "BOUNCER",
572 Params: []string{"NETWORK", netIDStr, "state=connected"},
573 })
574 }
575 })
576 uc.network.lastError = nil
577 case eventUpstreamDisconnected:
578 u.handleUpstreamDisconnected(e.uc)
579 case eventUpstreamConnectionError:
580 net := e.net
581
582 stopped := false
583 select {
584 case <-net.stopped:
585 stopped = true
586 default:
587 }
588
589 if !stopped && (net.lastError == nil || net.lastError.Error() != e.err.Error()) {
590 net.forEachDownstream(func(dc *downstreamConn) {
591 sendServiceNOTICE(dc, fmt.Sprintf("failed connecting/registering to %s: %v", net.GetName(), e.err))
592 })
593 }
594 net.lastError = e.err
595 case eventUpstreamError:
596 uc := e.uc
597
598 uc.forEachDownstream(func(dc *downstreamConn) {
599 sendServiceNOTICE(dc, fmt.Sprintf("disconnected from %s: %v", uc.network.GetName(), e.err))
600 })
601 uc.network.lastError = e.err
602 case eventUpstreamMessage:
603 msg, uc := e.msg, e.uc
604 if uc.isClosed() {
605 uc.logger.Printf("ignoring message on closed connection: %v", msg)
606 break
607 }
608 if err := uc.handleMessage(context.TODO(), msg); err != nil {
609 uc.logger.Printf("failed to handle message %q: %v", msg, err)
610 }
611 case eventChannelDetach:
612 uc, name := e.uc, e.name
613 c := uc.network.channels.Value(name)
614 if c == nil || c.Detached {
615 continue
616 }
617 uc.network.detach(c)
618 if err := uc.srv.db.StoreChannel(context.TODO(), uc.network.ID, c); err != nil {
619 u.logger.Printf("failed to store updated detached channel %q: %v", c.Name, err)
620 }
621 case eventDownstreamConnected:
622 dc := e.dc
623
624 if dc.network != nil {
625 dc.monitored.SetCasemapping(dc.network.casemap)
626 }
627
628 if err := dc.welcome(context.TODO()); err != nil {
629 dc.logger.Printf("failed to handle new registered connection: %v", err)
630 break
631 }
632
633 u.downstreamConns = append(u.downstreamConns, dc)
634
635 dc.forEachNetwork(func(network *network) {
636 if network.lastError != nil {
637 sendServiceNOTICE(dc, fmt.Sprintf("disconnected from %s: %v", network.GetName(), network.lastError))
638 }
639 })
640
641 u.forEachUpstream(func(uc *upstreamConn) {
642 uc.updateAway()
643 })
644 case eventDownstreamDisconnected:
645 dc := e.dc
646
647 for i := range u.downstreamConns {
648 if u.downstreamConns[i] == dc {
649 u.downstreamConns = append(u.downstreamConns[:i], u.downstreamConns[i+1:]...)
650 break
651 }
652 }
653
654 dc.forEachNetwork(func(net *network) {
655 net.storeClientDeliveryReceipts(context.TODO(), dc.clientName)
656 })
657
658 u.forEachUpstream(func(uc *upstreamConn) {
659 uc.cancelPendingCommandsByDownstreamID(dc.id)
660 uc.updateAway()
661 uc.updateMonitor()
662 })
663 case eventDownstreamMessage:
664 msg, dc := e.msg, e.dc
665 if dc.isClosed() {
666 dc.logger.Printf("ignoring message on closed connection: %v", msg)
667 break
668 }
669 err := dc.handleMessage(context.TODO(), msg)
670 if ircErr, ok := err.(ircError); ok {
671 ircErr.Message.Prefix = dc.srv.prefix()
672 dc.SendMessage(ircErr.Message)
673 } else if err != nil {
674 dc.logger.Printf("failed to handle message %q: %v", msg, err)
675 dc.Close()
676 }
677 case eventBroadcast:
678 msg := e.msg
679 u.forEachDownstream(func(dc *downstreamConn) {
680 dc.SendMessage(msg)
681 })
682 case eventUserUpdate:
683 // copy the user record because we'll mutate it
684 record := u.User
685
686 if e.password != nil {
687 record.Password = *e.password
688 }
689 if e.admin != nil {
690 record.Admin = *e.admin
691 }
692
693 e.done <- u.updateUser(context.TODO(), &record)
694
695 // If the password was updated, kill all downstream connections to
696 // force them to re-authenticate with the new credentials.
697 if e.password != nil {
698 u.forEachDownstream(func(dc *downstreamConn) {
699 dc.Close()
700 })
701 }
702 case eventStop:
703 u.forEachDownstream(func(dc *downstreamConn) {
704 dc.Close()
705 })
706 for _, n := range u.networks {
707 n.stop()
708
709 n.delivered.ForEachClient(func(clientName string) {
710 n.storeClientDeliveryReceipts(context.TODO(), clientName)
711 })
712 }
713 return
714 default:
715 panic(fmt.Sprintf("received unknown event type: %T", e))
716 }
717 }
718}
719
720func (u *user) handleUpstreamDisconnected(uc *upstreamConn) {
721 uc.network.conn = nil
722
723 uc.abortPendingCommands()
724
725 for _, entry := range uc.channels.innerMap {
726 uch := entry.value.(*upstreamChannel)
727 uch.updateAutoDetach(0)
728 }
729
730 netIDStr := fmt.Sprintf("%v", uc.network.ID)
731 uc.forEachDownstream(func(dc *downstreamConn) {
732 dc.updateSupportedCaps()
733 })
734
735 // If the network has been removed, don't send a state change notification
736 found := false
737 for _, net := range u.networks {
738 if net == uc.network {
739 found = true
740 break
741 }
742 }
743 if !found {
744 return
745 }
746
747 u.forEachDownstream(func(dc *downstreamConn) {
748 if dc.caps["soju.im/bouncer-networks-notify"] {
749 dc.SendMessage(&irc.Message{
750 Prefix: dc.srv.prefix(),
751 Command: "BOUNCER",
752 Params: []string{"NETWORK", netIDStr, "state=disconnected"},
753 })
754 }
755 })
756
757 if uc.network.lastError == nil {
758 uc.forEachDownstream(func(dc *downstreamConn) {
759 if !dc.caps["soju.im/bouncer-networks"] {
760 sendServiceNOTICE(dc, fmt.Sprintf("disconnected from %s", uc.network.GetName()))
761 }
762 })
763 }
764}
765
766func (u *user) addNetwork(network *network) {
767 u.networks = append(u.networks, network)
768 go network.run()
769}
770
771func (u *user) removeNetwork(network *network) {
772 network.stop()
773
774 u.forEachDownstream(func(dc *downstreamConn) {
775 if dc.network != nil && dc.network == network {
776 dc.Close()
777 }
778 })
779
780 for i, net := range u.networks {
781 if net == network {
782 u.networks = append(u.networks[:i], u.networks[i+1:]...)
783 return
784 }
785 }
786
787 panic("tried to remove a non-existing network")
788}
789
790func (u *user) checkNetwork(record *Network) error {
791 url, err := record.URL()
792 if err != nil {
793 return err
794 }
795 if url.User != nil {
796 return fmt.Errorf("%v:// URL must not have username and password information", url.Scheme)
797 }
798 if url.RawQuery != "" {
799 return fmt.Errorf("%v:// URL must not have query values", url.Scheme)
800 }
801 if url.Fragment != "" {
802 return fmt.Errorf("%v:// URL must not have a fragment", url.Scheme)
803 }
804 switch url.Scheme {
805 case "ircs", "irc+insecure":
806 if url.Host == "" {
807 return fmt.Errorf("%v:// URL must have a host", url.Scheme)
808 }
809 if url.Path != "" {
810 return fmt.Errorf("%v:// URL must not have a path", url.Scheme)
811 }
812 case "irc+unix", "unix":
813 if url.Host != "" {
814 return fmt.Errorf("%v:// URL must not have a host", url.Scheme)
815 }
816 if url.Path == "" {
817 return fmt.Errorf("%v:// URL must have a path", url.Scheme)
818 }
819 default:
820 return fmt.Errorf("unknown URL scheme %q", url.Scheme)
821 }
822
823 for _, net := range u.networks {
824 if net.GetName() == record.GetName() && net.ID != record.ID {
825 return fmt.Errorf("a network with the name %q already exists", record.GetName())
826 }
827 }
828
829 return nil
830}
831
832func (u *user) createNetwork(ctx context.Context, record *Network) (*network, error) {
833 if record.ID != 0 {
834 panic("tried creating an already-existing network")
835 }
836
837 if err := u.checkNetwork(record); err != nil {
838 return nil, err
839 }
840
841 if max := u.srv.Config().MaxUserNetworks; max >= 0 && len(u.networks) >= max {
842 return nil, fmt.Errorf("maximum number of networks reached")
843 }
844
845 network := newNetwork(u, record, nil)
846 err := u.srv.db.StoreNetwork(ctx, u.ID, &network.Network)
847 if err != nil {
848 return nil, err
849 }
850
851 u.addNetwork(network)
852
853 idStr := fmt.Sprintf("%v", network.ID)
854 attrs := getNetworkAttrs(network)
855 u.forEachDownstream(func(dc *downstreamConn) {
856 if dc.caps["soju.im/bouncer-networks-notify"] {
857 dc.SendMessage(&irc.Message{
858 Prefix: dc.srv.prefix(),
859 Command: "BOUNCER",
860 Params: []string{"NETWORK", idStr, attrs.String()},
861 })
862 }
863 })
864
865 return network, nil
866}
867
868func (u *user) updateNetwork(ctx context.Context, record *Network) (*network, error) {
869 if record.ID == 0 {
870 panic("tried updating a new network")
871 }
872
873 // If the realname is reset to the default, just wipe the per-network
874 // setting
875 if record.Realname == u.Realname {
876 record.Realname = ""
877 }
878
879 if err := u.checkNetwork(record); err != nil {
880 return nil, err
881 }
882
883 network := u.getNetworkByID(record.ID)
884 if network == nil {
885 panic("tried updating a non-existing network")
886 }
887
888 if err := u.srv.db.StoreNetwork(ctx, u.ID, record); err != nil {
889 return nil, err
890 }
891
892 // Most network changes require us to re-connect to the upstream server
893
894 channels := make([]Channel, 0, network.channels.Len())
895 for _, entry := range network.channels.innerMap {
896 ch := entry.value.(*Channel)
897 channels = append(channels, *ch)
898 }
899
900 updatedNetwork := newNetwork(u, record, channels)
901
902 // If we're currently connected, disconnect and perform the necessary
903 // bookkeeping
904 if network.conn != nil {
905 network.stop()
906 // Note: this will set network.conn to nil
907 u.handleUpstreamDisconnected(network.conn)
908 }
909
910 // Patch downstream connections to use our fresh updated network
911 u.forEachDownstream(func(dc *downstreamConn) {
912 if dc.network != nil && dc.network == network {
913 dc.network = updatedNetwork
914 }
915 })
916
917 // We need to remove the network after patching downstream connections,
918 // otherwise they'll get closed
919 u.removeNetwork(network)
920
921 // The filesystem message store needs to be notified whenever the network
922 // is renamed
923 fsMsgStore, isFS := u.msgStore.(*fsMessageStore)
924 if isFS && updatedNetwork.GetName() != network.GetName() {
925 if err := fsMsgStore.RenameNetwork(&network.Network, &updatedNetwork.Network); err != nil {
926 network.logger.Printf("failed to update FS message store network name to %q: %v", updatedNetwork.GetName(), err)
927 }
928 }
929
930 // This will re-connect to the upstream server
931 u.addNetwork(updatedNetwork)
932
933 // TODO: only broadcast attributes that have changed
934 idStr := fmt.Sprintf("%v", updatedNetwork.ID)
935 attrs := getNetworkAttrs(updatedNetwork)
936 u.forEachDownstream(func(dc *downstreamConn) {
937 if dc.caps["soju.im/bouncer-networks-notify"] {
938 dc.SendMessage(&irc.Message{
939 Prefix: dc.srv.prefix(),
940 Command: "BOUNCER",
941 Params: []string{"NETWORK", idStr, attrs.String()},
942 })
943 }
944 })
945
946 return updatedNetwork, nil
947}
948
949func (u *user) deleteNetwork(ctx context.Context, id int64) error {
950 network := u.getNetworkByID(id)
951 if network == nil {
952 panic("tried deleting a non-existing network")
953 }
954
955 if err := u.srv.db.DeleteNetwork(ctx, network.ID); err != nil {
956 return err
957 }
958
959 u.removeNetwork(network)
960
961 idStr := fmt.Sprintf("%v", network.ID)
962 u.forEachDownstream(func(dc *downstreamConn) {
963 if dc.caps["soju.im/bouncer-networks-notify"] {
964 dc.SendMessage(&irc.Message{
965 Prefix: dc.srv.prefix(),
966 Command: "BOUNCER",
967 Params: []string{"NETWORK", idStr, "*"},
968 })
969 }
970 })
971
972 return nil
973}
974
975func (u *user) updateUser(ctx context.Context, record *User) error {
976 if u.ID != record.ID {
977 panic("ID mismatch when updating user")
978 }
979
980 realnameUpdated := u.Realname != record.Realname
981 if err := u.srv.db.StoreUser(ctx, record); err != nil {
982 return fmt.Errorf("failed to update user %q: %v", u.Username, err)
983 }
984 u.User = *record
985
986 if realnameUpdated {
987 // Re-connect to networks which use the default realname
988 var needUpdate []Network
989 for _, net := range u.networks {
990 if net.Realname == "" {
991 needUpdate = append(needUpdate, net.Network)
992 }
993 }
994
995 var netErr error
996 for _, net := range needUpdate {
997 if _, err := u.updateNetwork(ctx, &net); err != nil {
998 netErr = err
999 }
1000 }
1001 if netErr != nil {
1002 return netErr
1003 }
1004 }
1005
1006 return nil
1007}
1008
1009func (u *user) stop() {
1010 u.events <- eventStop{}
1011 <-u.done
1012}
1013
1014func (u *user) hasPersistentMsgStore() bool {
1015 if u.msgStore == nil {
1016 return false
1017 }
1018 _, isMem := u.msgStore.(*memoryMessageStore)
1019 return !isMem
1020}
1021
1022// localAddrForHost returns the local address to use when connecting to host.
1023// A nil address is returned when the OS should automatically pick one.
1024func (u *user) localTCPAddrForHost(ctx context.Context, host string) (*net.TCPAddr, error) {
1025 upstreamUserIPs := u.srv.Config().UpstreamUserIPs
1026 if len(upstreamUserIPs) == 0 {
1027 return nil, nil
1028 }
1029
1030 ips, err := net.DefaultResolver.LookupIP(ctx, "ip", host)
1031 if err != nil {
1032 return nil, err
1033 }
1034
1035 wantIPv6 := false
1036 for _, ip := range ips {
1037 if ip.To4() == nil {
1038 wantIPv6 = true
1039 break
1040 }
1041 }
1042
1043 var ipNet *net.IPNet
1044 for _, in := range upstreamUserIPs {
1045 if wantIPv6 == (in.IP.To4() == nil) {
1046 ipNet = in
1047 break
1048 }
1049 }
1050 if ipNet == nil {
1051 return nil, nil
1052 }
1053
1054 var ipInt big.Int
1055 ipInt.SetBytes(ipNet.IP)
1056 ipInt.Add(&ipInt, big.NewInt(u.ID+1))
1057 ip := net.IP(ipInt.Bytes())
1058 if !ipNet.Contains(ip) {
1059 return nil, fmt.Errorf("IP network %v too small", ipNet)
1060 }
1061
1062 return &net.TCPAddr{IP: ip}, nil
1063}
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