source: code/trunk/user.go@ 710

Last change on this file since 710 was 710, checked in by contact, 4 years ago

Add number of upstream connections to metrics
File size: 23.4 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 for {
194 if net.isStopped() {
195 return
196 }
197
198 if dur := time.Now().Sub(lastTry); dur < retryConnectDelay {
199 delay := retryConnectDelay - dur
200 net.logger.Printf("waiting %v before trying to reconnect to %q", delay.Truncate(time.Second), net.Addr)
201 time.Sleep(delay)
202 }
203 lastTry = time.Now()
204
205 uc, err := connectToUpstream(net)
206 if err != nil {
207 net.logger.Printf("failed to connect to upstream server %q: %v", net.Addr, err)
208 net.user.events <- eventUpstreamConnectionError{net, fmt.Errorf("failed to connect: %v", err)}
209 continue
210 }
211
212 if net.user.srv.Identd != nil {
213 net.user.srv.Identd.Store(uc.RemoteAddr().String(), uc.LocalAddr().String(), userIdent(&net.user.User))
214 }
215
216 net.user.srv.metrics.upstreams.Add(1)
217
218 uc.register()
219 if err := uc.runUntilRegistered(); err != nil {
220 text := err.Error()
221 if regErr, ok := err.(registrationError); ok {
222 text = string(regErr)
223 }
224 uc.logger.Printf("failed to register: %v", text)
225 net.user.events <- eventUpstreamConnectionError{net, fmt.Errorf("failed to register: %v", text)}
226 uc.Close()
227 continue
228 }
229
230 // TODO: this is racy with net.stopped. If the network is stopped
231 // before the user goroutine receives eventUpstreamConnected, the
232 // connection won't be closed.
233 net.user.events <- eventUpstreamConnected{uc}
234 if err := uc.readMessages(net.user.events); err != nil {
235 uc.logger.Printf("failed to handle messages: %v", err)
236 net.user.events <- eventUpstreamError{uc, fmt.Errorf("failed to handle messages: %v", err)}
237 }
238 uc.Close()
239 net.user.events <- eventUpstreamDisconnected{uc}
240
241 if net.user.srv.Identd != nil {
242 net.user.srv.Identd.Delete(uc.RemoteAddr().String(), uc.LocalAddr().String())
243 }
244
245 net.user.srv.metrics.upstreams.Add(-1)
246 }
247}
248
249func (net *network) stop() {
250 if !net.isStopped() {
251 close(net.stopped)
252 }
253
254 if net.conn != nil {
255 net.conn.Close()
256 }
257}
258
259func (net *network) detach(ch *Channel) {
260 if ch.Detached {
261 return
262 }
263
264 net.logger.Printf("detaching channel %q", ch.Name)
265
266 ch.Detached = true
267
268 if net.user.msgStore != nil {
269 nameCM := net.casemap(ch.Name)
270 lastID, err := net.user.msgStore.LastMsgID(&net.Network, nameCM, time.Now())
271 if err != nil {
272 net.logger.Printf("failed to get last message ID for channel %q: %v", ch.Name, err)
273 }
274 ch.DetachedInternalMsgID = lastID
275 }
276
277 if net.conn != nil {
278 uch := net.conn.channels.Value(ch.Name)
279 if uch != nil {
280 uch.updateAutoDetach(0)
281 }
282 }
283
284 net.forEachDownstream(func(dc *downstreamConn) {
285 dc.SendMessage(&irc.Message{
286 Prefix: dc.prefix(),
287 Command: "PART",
288 Params: []string{dc.marshalEntity(net, ch.Name), "Detach"},
289 })
290 })
291}
292
293func (net *network) attach(ch *Channel) {
294 if !ch.Detached {
295 return
296 }
297
298 net.logger.Printf("attaching channel %q", ch.Name)
299
300 detachedMsgID := ch.DetachedInternalMsgID
301 ch.Detached = false
302 ch.DetachedInternalMsgID = ""
303
304 var uch *upstreamChannel
305 if net.conn != nil {
306 uch = net.conn.channels.Value(ch.Name)
307
308 net.conn.updateChannelAutoDetach(ch.Name)
309 }
310
311 net.forEachDownstream(func(dc *downstreamConn) {
312 dc.SendMessage(&irc.Message{
313 Prefix: dc.prefix(),
314 Command: "JOIN",
315 Params: []string{dc.marshalEntity(net, ch.Name)},
316 })
317
318 if uch != nil {
319 forwardChannel(dc, uch)
320 }
321
322 if detachedMsgID != "" {
323 dc.sendTargetBacklog(context.TODO(), net, ch.Name, detachedMsgID)
324 }
325 })
326}
327
328func (net *network) deleteChannel(ctx context.Context, name string) error {
329 ch := net.channels.Value(name)
330 if ch == nil {
331 return fmt.Errorf("unknown channel %q", name)
332 }
333 if net.conn != nil {
334 uch := net.conn.channels.Value(ch.Name)
335 if uch != nil {
336 uch.updateAutoDetach(0)
337 }
338 }
339
340 if err := net.user.srv.db.DeleteChannel(ctx, ch.ID); err != nil {
341 return err
342 }
343 net.channels.Delete(name)
344 return nil
345}
346
347func (net *network) updateCasemapping(newCasemap casemapping) {
348 net.casemap = newCasemap
349 net.channels.SetCasemapping(newCasemap)
350 net.delivered.m.SetCasemapping(newCasemap)
351 if uc := net.conn; uc != nil {
352 uc.channels.SetCasemapping(newCasemap)
353 for _, entry := range uc.channels.innerMap {
354 uch := entry.value.(*upstreamChannel)
355 uch.Members.SetCasemapping(newCasemap)
356 }
357 uc.monitored.SetCasemapping(newCasemap)
358 }
359 net.forEachDownstream(func(dc *downstreamConn) {
360 dc.monitored.SetCasemapping(newCasemap)
361 })
362}
363
364func (net *network) storeClientDeliveryReceipts(clientName string) {
365 if !net.user.hasPersistentMsgStore() {
366 return
367 }
368
369 var receipts []DeliveryReceipt
370 net.delivered.ForEachTarget(func(target string) {
371 msgID := net.delivered.LoadID(target, clientName)
372 if msgID == "" {
373 return
374 }
375 receipts = append(receipts, DeliveryReceipt{
376 Target: target,
377 InternalMsgID: msgID,
378 })
379 })
380
381 if err := net.user.srv.db.StoreClientDeliveryReceipts(context.TODO(), net.ID, clientName, receipts); err != nil {
382 net.logger.Printf("failed to store delivery receipts for client %q: %v", clientName, err)
383 }
384}
385
386func (net *network) isHighlight(msg *irc.Message) bool {
387 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
388 return false
389 }
390
391 text := msg.Params[1]
392
393 nick := net.Nick
394 if net.conn != nil {
395 nick = net.conn.nick
396 }
397
398 // TODO: use case-mapping aware comparison here
399 return msg.Prefix.Name != nick && isHighlight(text, nick)
400}
401
402func (net *network) detachedMessageNeedsRelay(ch *Channel, msg *irc.Message) bool {
403 highlight := net.isHighlight(msg)
404 return ch.RelayDetached == FilterMessage || ((ch.RelayDetached == FilterHighlight || ch.RelayDetached == FilterDefault) && highlight)
405}
406
407type user struct {
408 User
409 srv *Server
410 logger Logger
411
412 events chan event
413 done chan struct{}
414
415 networks []*network
416 downstreamConns []*downstreamConn
417 msgStore messageStore
418}
419
420func newUser(srv *Server, record *User) *user {
421 logger := &prefixLogger{srv.Logger, fmt.Sprintf("user %q: ", record.Username)}
422
423 var msgStore messageStore
424 if logPath := srv.Config().LogPath; logPath != "" {
425 msgStore = newFSMessageStore(logPath, record.Username)
426 } else {
427 msgStore = newMemoryMessageStore()
428 }
429
430 return &user{
431 User: *record,
432 srv: srv,
433 logger: logger,
434 events: make(chan event, 64),
435 done: make(chan struct{}),
436 msgStore: msgStore,
437 }
438}
439
440func (u *user) forEachNetwork(f func(*network)) {
441 for _, network := range u.networks {
442 f(network)
443 }
444}
445
446func (u *user) forEachUpstream(f func(uc *upstreamConn)) {
447 for _, network := range u.networks {
448 if network.conn == nil {
449 continue
450 }
451 f(network.conn)
452 }
453}
454
455func (u *user) forEachDownstream(f func(dc *downstreamConn)) {
456 for _, dc := range u.downstreamConns {
457 f(dc)
458 }
459}
460
461func (u *user) getNetwork(name string) *network {
462 for _, network := range u.networks {
463 if network.Addr == name {
464 return network
465 }
466 if network.Name != "" && network.Name == name {
467 return network
468 }
469 }
470 return nil
471}
472
473func (u *user) getNetworkByID(id int64) *network {
474 for _, net := range u.networks {
475 if net.ID == id {
476 return net
477 }
478 }
479 return nil
480}
481
482func (u *user) run() {
483 defer func() {
484 if u.msgStore != nil {
485 if err := u.msgStore.Close(); err != nil {
486 u.logger.Printf("failed to close message store for user %q: %v", u.Username, err)
487 }
488 }
489 close(u.done)
490 }()
491
492 networks, err := u.srv.db.ListNetworks(context.TODO(), u.ID)
493 if err != nil {
494 u.logger.Printf("failed to list networks for user %q: %v", u.Username, err)
495 return
496 }
497
498 for _, record := range networks {
499 record := record
500 channels, err := u.srv.db.ListChannels(context.TODO(), record.ID)
501 if err != nil {
502 u.logger.Printf("failed to list channels for user %q, network %q: %v", u.Username, record.GetName(), err)
503 continue
504 }
505
506 network := newNetwork(u, &record, channels)
507 u.networks = append(u.networks, network)
508
509 if u.hasPersistentMsgStore() {
510 receipts, err := u.srv.db.ListDeliveryReceipts(context.TODO(), record.ID)
511 if err != nil {
512 u.logger.Printf("failed to load delivery receipts for user %q, network %q: %v", u.Username, network.GetName(), err)
513 return
514 }
515
516 for _, rcpt := range receipts {
517 network.delivered.StoreID(rcpt.Target, rcpt.Client, rcpt.InternalMsgID)
518 }
519 }
520
521 go network.run()
522 }
523
524 for e := range u.events {
525 switch e := e.(type) {
526 case eventUpstreamConnected:
527 uc := e.uc
528
529 uc.network.conn = uc
530
531 uc.updateAway()
532 uc.updateMonitor()
533
534 netIDStr := fmt.Sprintf("%v", uc.network.ID)
535 uc.forEachDownstream(func(dc *downstreamConn) {
536 dc.updateSupportedCaps()
537
538 if !dc.caps["soju.im/bouncer-networks"] {
539 sendServiceNOTICE(dc, fmt.Sprintf("connected to %s", uc.network.GetName()))
540 }
541
542 dc.updateNick()
543 dc.updateRealname()
544 })
545 u.forEachDownstream(func(dc *downstreamConn) {
546 if dc.caps["soju.im/bouncer-networks-notify"] {
547 dc.SendMessage(&irc.Message{
548 Prefix: dc.srv.prefix(),
549 Command: "BOUNCER",
550 Params: []string{"NETWORK", netIDStr, "state=connected"},
551 })
552 }
553 })
554 uc.network.lastError = nil
555 case eventUpstreamDisconnected:
556 u.handleUpstreamDisconnected(e.uc)
557 case eventUpstreamConnectionError:
558 net := e.net
559
560 stopped := false
561 select {
562 case <-net.stopped:
563 stopped = true
564 default:
565 }
566
567 if !stopped && (net.lastError == nil || net.lastError.Error() != e.err.Error()) {
568 net.forEachDownstream(func(dc *downstreamConn) {
569 sendServiceNOTICE(dc, fmt.Sprintf("failed connecting/registering to %s: %v", net.GetName(), e.err))
570 })
571 }
572 net.lastError = e.err
573 case eventUpstreamError:
574 uc := e.uc
575
576 uc.forEachDownstream(func(dc *downstreamConn) {
577 sendServiceNOTICE(dc, fmt.Sprintf("disconnected from %s: %v", uc.network.GetName(), e.err))
578 })
579 uc.network.lastError = e.err
580 case eventUpstreamMessage:
581 msg, uc := e.msg, e.uc
582 if uc.isClosed() {
583 uc.logger.Printf("ignoring message on closed connection: %v", msg)
584 break
585 }
586 if err := uc.handleMessage(msg); err != nil {
587 uc.logger.Printf("failed to handle message %q: %v", msg, err)
588 }
589 case eventChannelDetach:
590 uc, name := e.uc, e.name
591 c := uc.network.channels.Value(name)
592 if c == nil || c.Detached {
593 continue
594 }
595 uc.network.detach(c)
596 if err := uc.srv.db.StoreChannel(context.TODO(), uc.network.ID, c); err != nil {
597 u.logger.Printf("failed to store updated detached channel %q: %v", c.Name, err)
598 }
599 case eventDownstreamConnected:
600 dc := e.dc
601
602 if dc.network != nil {
603 dc.monitored.SetCasemapping(dc.network.casemap)
604 }
605
606 if err := dc.welcome(context.TODO()); err != nil {
607 dc.logger.Printf("failed to handle new registered connection: %v", err)
608 break
609 }
610
611 u.downstreamConns = append(u.downstreamConns, dc)
612
613 dc.forEachNetwork(func(network *network) {
614 if network.lastError != nil {
615 sendServiceNOTICE(dc, fmt.Sprintf("disconnected from %s: %v", network.GetName(), network.lastError))
616 }
617 })
618
619 u.forEachUpstream(func(uc *upstreamConn) {
620 uc.updateAway()
621 })
622 case eventDownstreamDisconnected:
623 dc := e.dc
624
625 for i := range u.downstreamConns {
626 if u.downstreamConns[i] == dc {
627 u.downstreamConns = append(u.downstreamConns[:i], u.downstreamConns[i+1:]...)
628 break
629 }
630 }
631
632 dc.forEachNetwork(func(net *network) {
633 net.storeClientDeliveryReceipts(dc.clientName)
634 })
635
636 u.forEachUpstream(func(uc *upstreamConn) {
637 uc.updateAway()
638 uc.updateMonitor()
639 })
640 case eventDownstreamMessage:
641 msg, dc := e.msg, e.dc
642 if dc.isClosed() {
643 dc.logger.Printf("ignoring message on closed connection: %v", msg)
644 break
645 }
646 err := dc.handleMessage(context.TODO(), msg)
647 if ircErr, ok := err.(ircError); ok {
648 ircErr.Message.Prefix = dc.srv.prefix()
649 dc.SendMessage(ircErr.Message)
650 } else if err != nil {
651 dc.logger.Printf("failed to handle message %q: %v", msg, err)
652 dc.Close()
653 }
654 case eventBroadcast:
655 msg := e.msg
656 u.forEachDownstream(func(dc *downstreamConn) {
657 dc.SendMessage(msg)
658 })
659 case eventUserUpdate:
660 // copy the user record because we'll mutate it
661 record := u.User
662
663 if e.password != nil {
664 record.Password = *e.password
665 }
666 if e.admin != nil {
667 record.Admin = *e.admin
668 }
669
670 e.done <- u.updateUser(context.TODO(), &record)
671
672 // If the password was updated, kill all downstream connections to
673 // force them to re-authenticate with the new credentials.
674 if e.password != nil {
675 u.forEachDownstream(func(dc *downstreamConn) {
676 dc.Close()
677 })
678 }
679 case eventStop:
680 u.forEachDownstream(func(dc *downstreamConn) {
681 dc.Close()
682 })
683 for _, n := range u.networks {
684 n.stop()
685
686 n.delivered.ForEachClient(func(clientName string) {
687 n.storeClientDeliveryReceipts(clientName)
688 })
689 }
690 return
691 default:
692 panic(fmt.Sprintf("received unknown event type: %T", e))
693 }
694 }
695}
696
697func (u *user) handleUpstreamDisconnected(uc *upstreamConn) {
698 uc.network.conn = nil
699
700 uc.endPendingCommands()
701
702 for _, entry := range uc.channels.innerMap {
703 uch := entry.value.(*upstreamChannel)
704 uch.updateAutoDetach(0)
705 }
706
707 netIDStr := fmt.Sprintf("%v", uc.network.ID)
708 uc.forEachDownstream(func(dc *downstreamConn) {
709 dc.updateSupportedCaps()
710 })
711
712 // If the network has been removed, don't send a state change notification
713 found := false
714 for _, net := range u.networks {
715 if net == uc.network {
716 found = true
717 break
718 }
719 }
720 if !found {
721 return
722 }
723
724 u.forEachDownstream(func(dc *downstreamConn) {
725 if dc.caps["soju.im/bouncer-networks-notify"] {
726 dc.SendMessage(&irc.Message{
727 Prefix: dc.srv.prefix(),
728 Command: "BOUNCER",
729 Params: []string{"NETWORK", netIDStr, "state=disconnected"},
730 })
731 }
732 })
733
734 if uc.network.lastError == nil {
735 uc.forEachDownstream(func(dc *downstreamConn) {
736 if !dc.caps["soju.im/bouncer-networks"] {
737 sendServiceNOTICE(dc, fmt.Sprintf("disconnected from %s", uc.network.GetName()))
738 }
739 })
740 }
741}
742
743func (u *user) addNetwork(network *network) {
744 u.networks = append(u.networks, network)
745 go network.run()
746}
747
748func (u *user) removeNetwork(network *network) {
749 network.stop()
750
751 u.forEachDownstream(func(dc *downstreamConn) {
752 if dc.network != nil && dc.network == network {
753 dc.Close()
754 }
755 })
756
757 for i, net := range u.networks {
758 if net == network {
759 u.networks = append(u.networks[:i], u.networks[i+1:]...)
760 return
761 }
762 }
763
764 panic("tried to remove a non-existing network")
765}
766
767func (u *user) checkNetwork(record *Network) error {
768 for _, net := range u.networks {
769 if net.GetName() == record.GetName() && net.ID != record.ID {
770 return fmt.Errorf("a network with the name %q already exists", record.GetName())
771 }
772 }
773 return nil
774}
775
776func (u *user) createNetwork(ctx context.Context, record *Network) (*network, error) {
777 if record.ID != 0 {
778 panic("tried creating an already-existing network")
779 }
780
781 if err := u.checkNetwork(record); err != nil {
782 return nil, err
783 }
784
785 if max := u.srv.Config().MaxUserNetworks; max >= 0 && len(u.networks) >= max {
786 return nil, fmt.Errorf("maximum number of networks reached")
787 }
788
789 network := newNetwork(u, record, nil)
790 err := u.srv.db.StoreNetwork(ctx, u.ID, &network.Network)
791 if err != nil {
792 return nil, err
793 }
794
795 u.addNetwork(network)
796
797 idStr := fmt.Sprintf("%v", network.ID)
798 attrs := getNetworkAttrs(network)
799 u.forEachDownstream(func(dc *downstreamConn) {
800 if dc.caps["soju.im/bouncer-networks-notify"] {
801 dc.SendMessage(&irc.Message{
802 Prefix: dc.srv.prefix(),
803 Command: "BOUNCER",
804 Params: []string{"NETWORK", idStr, attrs.String()},
805 })
806 }
807 })
808
809 return network, nil
810}
811
812func (u *user) updateNetwork(ctx context.Context, record *Network) (*network, error) {
813 if record.ID == 0 {
814 panic("tried updating a new network")
815 }
816
817 // If the realname is reset to the default, just wipe the per-network
818 // setting
819 if record.Realname == u.Realname {
820 record.Realname = ""
821 }
822
823 if err := u.checkNetwork(record); err != nil {
824 return nil, err
825 }
826
827 network := u.getNetworkByID(record.ID)
828 if network == nil {
829 panic("tried updating a non-existing network")
830 }
831
832 if err := u.srv.db.StoreNetwork(ctx, u.ID, record); err != nil {
833 return nil, err
834 }
835
836 // Most network changes require us to re-connect to the upstream server
837
838 channels := make([]Channel, 0, network.channels.Len())
839 for _, entry := range network.channels.innerMap {
840 ch := entry.value.(*Channel)
841 channels = append(channels, *ch)
842 }
843
844 updatedNetwork := newNetwork(u, record, channels)
845
846 // If we're currently connected, disconnect and perform the necessary
847 // bookkeeping
848 if network.conn != nil {
849 network.stop()
850 // Note: this will set network.conn to nil
851 u.handleUpstreamDisconnected(network.conn)
852 }
853
854 // Patch downstream connections to use our fresh updated network
855 u.forEachDownstream(func(dc *downstreamConn) {
856 if dc.network != nil && dc.network == network {
857 dc.network = updatedNetwork
858 }
859 })
860
861 // We need to remove the network after patching downstream connections,
862 // otherwise they'll get closed
863 u.removeNetwork(network)
864
865 // The filesystem message store needs to be notified whenever the network
866 // is renamed
867 fsMsgStore, isFS := u.msgStore.(*fsMessageStore)
868 if isFS && updatedNetwork.GetName() != network.GetName() {
869 if err := fsMsgStore.RenameNetwork(&network.Network, &updatedNetwork.Network); err != nil {
870 network.logger.Printf("failed to update FS message store network name to %q: %v", updatedNetwork.GetName(), err)
871 }
872 }
873
874 // This will re-connect to the upstream server
875 u.addNetwork(updatedNetwork)
876
877 // TODO: only broadcast attributes that have changed
878 idStr := fmt.Sprintf("%v", updatedNetwork.ID)
879 attrs := getNetworkAttrs(updatedNetwork)
880 u.forEachDownstream(func(dc *downstreamConn) {
881 if dc.caps["soju.im/bouncer-networks-notify"] {
882 dc.SendMessage(&irc.Message{
883 Prefix: dc.srv.prefix(),
884 Command: "BOUNCER",
885 Params: []string{"NETWORK", idStr, attrs.String()},
886 })
887 }
888 })
889
890 return updatedNetwork, nil
891}
892
893func (u *user) deleteNetwork(ctx context.Context, id int64) error {
894 network := u.getNetworkByID(id)
895 if network == nil {
896 panic("tried deleting a non-existing network")
897 }
898
899 if err := u.srv.db.DeleteNetwork(ctx, network.ID); err != nil {
900 return err
901 }
902
903 u.removeNetwork(network)
904
905 idStr := fmt.Sprintf("%v", network.ID)
906 u.forEachDownstream(func(dc *downstreamConn) {
907 if dc.caps["soju.im/bouncer-networks-notify"] {
908 dc.SendMessage(&irc.Message{
909 Prefix: dc.srv.prefix(),
910 Command: "BOUNCER",
911 Params: []string{"NETWORK", idStr, "*"},
912 })
913 }
914 })
915
916 return nil
917}
918
919func (u *user) updateUser(ctx context.Context, record *User) error {
920 if u.ID != record.ID {
921 panic("ID mismatch when updating user")
922 }
923
924 realnameUpdated := u.Realname != record.Realname
925 if err := u.srv.db.StoreUser(ctx, record); err != nil {
926 return fmt.Errorf("failed to update user %q: %v", u.Username, err)
927 }
928 u.User = *record
929
930 if realnameUpdated {
931 // Re-connect to networks which use the default realname
932 var needUpdate []Network
933 u.forEachNetwork(func(net *network) {
934 if net.Realname == "" {
935 needUpdate = append(needUpdate, net.Network)
936 }
937 })
938
939 var netErr error
940 for _, net := range needUpdate {
941 if _, err := u.updateNetwork(ctx, &net); err != nil {
942 netErr = err
943 }
944 }
945 if netErr != nil {
946 return netErr
947 }
948 }
949
950 return nil
951}
952
953func (u *user) stop() {
954 u.events <- eventStop{}
955 <-u.done
956}
957
958func (u *user) hasPersistentMsgStore() bool {
959 if u.msgStore == nil {
960 return false
961 }
962 _, isMem := u.msgStore.(*memoryMessageStore)
963 return !isMem
964}
965
966// localAddrForHost returns the local address to use when connecting to host.
967// A nil address is returned when the OS should automatically pick one.
968func (u *user) localTCPAddrForHost(host string) (*net.TCPAddr, error) {
969 upstreamUserIPs := u.srv.Config().UpstreamUserIPs
970 if len(upstreamUserIPs) == 0 {
971 return nil, nil
972 }
973
974 ips, err := net.LookupIP(host)
975 if err != nil {
976 return nil, err
977 }
978
979 wantIPv6 := false
980 for _, ip := range ips {
981 if ip.To4() == nil {
982 wantIPv6 = true
983 break
984 }
985 }
986
987 var ipNet *net.IPNet
988 for _, in := range upstreamUserIPs {
989 if wantIPv6 == (in.IP.To4() == nil) {
990 ipNet = in
991 break
992 }
993 }
994 if ipNet == nil {
995 return nil, nil
996 }
997
998 var ipInt big.Int
999 ipInt.SetBytes(ipNet.IP)
1000 ipInt.Add(&ipInt, big.NewInt(u.ID+1))
1001 ip := net.IP(ipInt.Bytes())
1002 if !ipNet.Contains(ip) {
1003 return nil, fmt.Errorf("IP network %v too small", ipNet)
1004 }
1005
1006 return &net.TCPAddr{IP: ip}, nil
1007}
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