source: code/trunk/downstream.go@ 406

Last change on this file since 406 was 406, checked in by contact, 5 years ago

Replace networkHistory.offlineClients with clients

Keep the ring buffer alive even if all clients are connected. Keep the
ID of the latest delivered message even for online clients.

As-is, this is a net downgrade: memory usage increases because ring
buffers aren't free'd anymore. However upcoming commits will replace the
ring buffer with log files. This change makes reading from log files
easier.
File size: 41.0 KB
Line 
1package soju
2
3import (
4 "crypto/tls"
5 "encoding/base64"
6 "fmt"
7 "io"
8 "net"
9 "strconv"
10 "strings"
11 "time"
12
13 "github.com/emersion/go-sasl"
14 "golang.org/x/crypto/bcrypt"
15 "gopkg.in/irc.v3"
16)
17
18type ircError struct {
19 Message *irc.Message
20}
21
22func (err ircError) Error() string {
23 return err.Message.String()
24}
25
26func newUnknownCommandError(cmd string) ircError {
27 return ircError{&irc.Message{
28 Command: irc.ERR_UNKNOWNCOMMAND,
29 Params: []string{
30 "*",
31 cmd,
32 "Unknown command",
33 },
34 }}
35}
36
37func newNeedMoreParamsError(cmd string) ircError {
38 return ircError{&irc.Message{
39 Command: irc.ERR_NEEDMOREPARAMS,
40 Params: []string{
41 "*",
42 cmd,
43 "Not enough parameters",
44 },
45 }}
46}
47
48func newChatHistoryError(subcommand string, target string) ircError {
49 return ircError{&irc.Message{
50 Command: "FAIL",
51 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, target, "Messages could not be retrieved"},
52 }}
53}
54
55var errAuthFailed = ircError{&irc.Message{
56 Command: irc.ERR_PASSWDMISMATCH,
57 Params: []string{"*", "Invalid username or password"},
58}}
59
60const illegalNickChars = " :/@!*?"
61
62// permanentDownstreamCaps is the list of always-supported downstream
63// capabilities.
64var permanentDownstreamCaps = map[string]string{
65 "batch": "",
66 "cap-notify": "",
67 "echo-message": "",
68 "message-tags": "",
69 "sasl": "PLAIN",
70 "server-time": "",
71}
72
73// needAllDownstreamCaps is the list of downstream capabilities that
74// require support from all upstreams to be enabled
75var needAllDownstreamCaps = map[string]string{
76 "away-notify": "",
77 "multi-prefix": "",
78}
79
80type downstreamConn struct {
81 conn
82
83 id uint64
84
85 registered bool
86 user *user
87 nick string
88 rawUsername string
89 networkName string
90 clientName string
91 realname string
92 hostname string
93 password string // empty after authentication
94 network *network // can be nil
95
96 negociatingCaps bool
97 capVersion int
98 supportedCaps map[string]string
99 caps map[string]bool
100
101 saslServer sasl.Server
102}
103
104func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
105 remoteAddr := ic.RemoteAddr().String()
106 logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
107 options := connOptions{Logger: logger}
108 dc := &downstreamConn{
109 conn: *newConn(srv, ic, &options),
110 id: id,
111 supportedCaps: make(map[string]string),
112 caps: make(map[string]bool),
113 }
114 dc.hostname = remoteAddr
115 if host, _, err := net.SplitHostPort(dc.hostname); err == nil {
116 dc.hostname = host
117 }
118 for k, v := range permanentDownstreamCaps {
119 dc.supportedCaps[k] = v
120 }
121 if srv.LogPath != "" {
122 dc.supportedCaps["draft/chathistory"] = ""
123 }
124 return dc
125}
126
127func (dc *downstreamConn) prefix() *irc.Prefix {
128 return &irc.Prefix{
129 Name: dc.nick,
130 User: dc.user.Username,
131 Host: dc.hostname,
132 }
133}
134
135func (dc *downstreamConn) forEachNetwork(f func(*network)) {
136 if dc.network != nil {
137 f(dc.network)
138 } else {
139 dc.user.forEachNetwork(f)
140 }
141}
142
143func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
144 dc.user.forEachUpstream(func(uc *upstreamConn) {
145 if dc.network != nil && uc.network != dc.network {
146 return
147 }
148 f(uc)
149 })
150}
151
152// upstream returns the upstream connection, if any. If there are zero or if
153// there are multiple upstream connections, it returns nil.
154func (dc *downstreamConn) upstream() *upstreamConn {
155 if dc.network == nil {
156 return nil
157 }
158 return dc.network.conn
159}
160
161func isOurNick(net *network, nick string) bool {
162 // TODO: this doesn't account for nick changes
163 if net.conn != nil {
164 return nick == net.conn.nick
165 }
166 // We're not currently connected to the upstream connection, so we don't
167 // know whether this name is our nickname. Best-effort: use the network's
168 // configured nickname and hope it was the one being used when we were
169 // connected.
170 return nick == net.Nick
171}
172
173// marshalEntity converts an upstream entity name (ie. channel or nick) into a
174// downstream entity name.
175//
176// This involves adding a "/<network>" suffix if the entity isn't the current
177// user.
178func (dc *downstreamConn) marshalEntity(net *network, name string) string {
179 if isOurNick(net, name) {
180 return dc.nick
181 }
182 if dc.network != nil {
183 if dc.network != net {
184 panic("soju: tried to marshal an entity for another network")
185 }
186 return name
187 }
188 return name + "/" + net.GetName()
189}
190
191func (dc *downstreamConn) marshalUserPrefix(net *network, prefix *irc.Prefix) *irc.Prefix {
192 if isOurNick(net, prefix.Name) {
193 return dc.prefix()
194 }
195 if dc.network != nil {
196 if dc.network != net {
197 panic("soju: tried to marshal a user prefix for another network")
198 }
199 return prefix
200 }
201 return &irc.Prefix{
202 Name: prefix.Name + "/" + net.GetName(),
203 User: prefix.User,
204 Host: prefix.Host,
205 }
206}
207
208// unmarshalEntity converts a downstream entity name (ie. channel or nick) into
209// an upstream entity name.
210//
211// This involves removing the "/<network>" suffix.
212func (dc *downstreamConn) unmarshalEntity(name string) (*upstreamConn, string, error) {
213 if uc := dc.upstream(); uc != nil {
214 return uc, name, nil
215 }
216
217 var conn *upstreamConn
218 if i := strings.LastIndexByte(name, '/'); i >= 0 {
219 network := name[i+1:]
220 name = name[:i]
221
222 dc.forEachUpstream(func(uc *upstreamConn) {
223 if network != uc.network.GetName() {
224 return
225 }
226 conn = uc
227 })
228 }
229
230 if conn == nil {
231 return nil, "", ircError{&irc.Message{
232 Command: irc.ERR_NOSUCHCHANNEL,
233 Params: []string{name, "No such channel"},
234 }}
235 }
236 return conn, name, nil
237}
238
239func (dc *downstreamConn) unmarshalText(uc *upstreamConn, text string) string {
240 if dc.upstream() != nil {
241 return text
242 }
243 // TODO: smarter parsing that ignores URLs
244 return strings.ReplaceAll(text, "/"+uc.network.GetName(), "")
245}
246
247func (dc *downstreamConn) readMessages(ch chan<- event) error {
248 for {
249 msg, err := dc.ReadMessage()
250 if err == io.EOF {
251 break
252 } else if err != nil {
253 return fmt.Errorf("failed to read IRC command: %v", err)
254 }
255
256 ch <- eventDownstreamMessage{msg, dc}
257 }
258
259 return nil
260}
261
262// SendMessage sends an outgoing message.
263//
264// This can only called from the user goroutine.
265func (dc *downstreamConn) SendMessage(msg *irc.Message) {
266 if !dc.caps["message-tags"] {
267 if msg.Command == "TAGMSG" {
268 return
269 }
270 msg = msg.Copy()
271 for name := range msg.Tags {
272 supported := false
273 switch name {
274 case "time":
275 supported = dc.caps["server-time"]
276 }
277 if !supported {
278 delete(msg.Tags, name)
279 }
280 }
281 }
282
283 dc.conn.SendMessage(msg)
284}
285
286// marshalMessage re-formats a message coming from an upstream connection so
287// that it's suitable for being sent on this downstream connection. Only
288// messages that may appear in logs are supported, except MODE.
289func (dc *downstreamConn) marshalMessage(msg *irc.Message, net *network) *irc.Message {
290 msg = msg.Copy()
291 msg.Prefix = dc.marshalUserPrefix(net, msg.Prefix)
292
293 switch msg.Command {
294 case "PRIVMSG", "NOTICE", "TAGMSG":
295 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
296 case "NICK":
297 // Nick change for another user
298 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
299 case "JOIN", "PART":
300 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
301 case "KICK":
302 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
303 msg.Params[1] = dc.marshalEntity(net, msg.Params[1])
304 case "TOPIC":
305 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
306 case "QUIT":
307 // This space is intentionally left blank
308 default:
309 panic(fmt.Sprintf("unexpected %q message", msg.Command))
310 }
311
312 return msg
313}
314
315func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
316 switch msg.Command {
317 case "QUIT":
318 return dc.Close()
319 default:
320 if dc.registered {
321 return dc.handleMessageRegistered(msg)
322 } else {
323 return dc.handleMessageUnregistered(msg)
324 }
325 }
326}
327
328func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
329 switch msg.Command {
330 case "NICK":
331 var nick string
332 if err := parseMessageParams(msg, &nick); err != nil {
333 return err
334 }
335 if strings.ContainsAny(nick, illegalNickChars) {
336 return ircError{&irc.Message{
337 Command: irc.ERR_ERRONEUSNICKNAME,
338 Params: []string{dc.nick, nick, "contains illegal characters"},
339 }}
340 }
341 if nick == serviceNick {
342 return ircError{&irc.Message{
343 Command: irc.ERR_NICKNAMEINUSE,
344 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
345 }}
346 }
347 dc.nick = nick
348 case "USER":
349 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
350 return err
351 }
352 case "PASS":
353 if err := parseMessageParams(msg, &dc.password); err != nil {
354 return err
355 }
356 case "CAP":
357 var subCmd string
358 if err := parseMessageParams(msg, &subCmd); err != nil {
359 return err
360 }
361 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
362 return err
363 }
364 case "AUTHENTICATE":
365 if !dc.caps["sasl"] {
366 return ircError{&irc.Message{
367 Command: irc.ERR_SASLFAIL,
368 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
369 }}
370 }
371 if len(msg.Params) == 0 {
372 return ircError{&irc.Message{
373 Command: irc.ERR_SASLFAIL,
374 Params: []string{"*", "Missing AUTHENTICATE argument"},
375 }}
376 }
377 if dc.nick == "" {
378 return ircError{&irc.Message{
379 Command: irc.ERR_SASLFAIL,
380 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
381 }}
382 }
383
384 var resp []byte
385 if dc.saslServer == nil {
386 mech := strings.ToUpper(msg.Params[0])
387 switch mech {
388 case "PLAIN":
389 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
390 return dc.authenticate(username, password)
391 }))
392 default:
393 return ircError{&irc.Message{
394 Command: irc.ERR_SASLFAIL,
395 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
396 }}
397 }
398 } else if msg.Params[0] == "*" {
399 dc.saslServer = nil
400 return ircError{&irc.Message{
401 Command: irc.ERR_SASLABORTED,
402 Params: []string{"*", "SASL authentication aborted"},
403 }}
404 } else if msg.Params[0] == "+" {
405 resp = nil
406 } else {
407 // TODO: multi-line messages
408 var err error
409 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
410 if err != nil {
411 dc.saslServer = nil
412 return ircError{&irc.Message{
413 Command: irc.ERR_SASLFAIL,
414 Params: []string{"*", "Invalid base64-encoded response"},
415 }}
416 }
417 }
418
419 challenge, done, err := dc.saslServer.Next(resp)
420 if err != nil {
421 dc.saslServer = nil
422 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
423 return ircError{&irc.Message{
424 Command: irc.ERR_SASLFAIL,
425 Params: []string{"*", ircErr.Message.Params[1]},
426 }}
427 }
428 dc.SendMessage(&irc.Message{
429 Prefix: dc.srv.prefix(),
430 Command: irc.ERR_SASLFAIL,
431 Params: []string{"*", "SASL error"},
432 })
433 return fmt.Errorf("SASL authentication failed: %v", err)
434 } else if done {
435 dc.saslServer = nil
436 dc.SendMessage(&irc.Message{
437 Prefix: dc.srv.prefix(),
438 Command: irc.RPL_LOGGEDIN,
439 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
440 })
441 dc.SendMessage(&irc.Message{
442 Prefix: dc.srv.prefix(),
443 Command: irc.RPL_SASLSUCCESS,
444 Params: []string{dc.nick, "SASL authentication successful"},
445 })
446 } else {
447 challengeStr := "+"
448 if len(challenge) > 0 {
449 challengeStr = base64.StdEncoding.EncodeToString(challenge)
450 }
451
452 // TODO: multi-line messages
453 dc.SendMessage(&irc.Message{
454 Prefix: dc.srv.prefix(),
455 Command: "AUTHENTICATE",
456 Params: []string{challengeStr},
457 })
458 }
459 default:
460 dc.logger.Printf("unhandled message: %v", msg)
461 return newUnknownCommandError(msg.Command)
462 }
463 if dc.rawUsername != "" && dc.nick != "" && !dc.negociatingCaps {
464 return dc.register()
465 }
466 return nil
467}
468
469func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
470 cmd = strings.ToUpper(cmd)
471
472 replyTo := dc.nick
473 if !dc.registered {
474 replyTo = "*"
475 }
476
477 switch cmd {
478 case "LS":
479 if len(args) > 0 {
480 var err error
481 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
482 return err
483 }
484 }
485
486 caps := make([]string, 0, len(dc.supportedCaps))
487 for k, v := range dc.supportedCaps {
488 if dc.capVersion >= 302 && v != "" {
489 caps = append(caps, k+"="+v)
490 } else {
491 caps = append(caps, k)
492 }
493 }
494
495 // TODO: multi-line replies
496 dc.SendMessage(&irc.Message{
497 Prefix: dc.srv.prefix(),
498 Command: "CAP",
499 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
500 })
501
502 if dc.capVersion >= 302 {
503 // CAP version 302 implicitly enables cap-notify
504 dc.caps["cap-notify"] = true
505 }
506
507 if !dc.registered {
508 dc.negociatingCaps = true
509 }
510 case "LIST":
511 var caps []string
512 for name := range dc.caps {
513 caps = append(caps, name)
514 }
515
516 // TODO: multi-line replies
517 dc.SendMessage(&irc.Message{
518 Prefix: dc.srv.prefix(),
519 Command: "CAP",
520 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
521 })
522 case "REQ":
523 if len(args) == 0 {
524 return ircError{&irc.Message{
525 Command: err_invalidcapcmd,
526 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
527 }}
528 }
529
530 // TODO: atomically ack/nak the whole capability set
531 caps := strings.Fields(args[0])
532 ack := true
533 for _, name := range caps {
534 name = strings.ToLower(name)
535 enable := !strings.HasPrefix(name, "-")
536 if !enable {
537 name = strings.TrimPrefix(name, "-")
538 }
539
540 if enable == dc.caps[name] {
541 continue
542 }
543
544 _, ok := dc.supportedCaps[name]
545 if !ok {
546 ack = false
547 break
548 }
549
550 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
551 // cap-notify cannot be disabled with CAP version 302
552 ack = false
553 break
554 }
555
556 dc.caps[name] = enable
557 }
558
559 reply := "NAK"
560 if ack {
561 reply = "ACK"
562 }
563 dc.SendMessage(&irc.Message{
564 Prefix: dc.srv.prefix(),
565 Command: "CAP",
566 Params: []string{replyTo, reply, args[0]},
567 })
568 case "END":
569 dc.negociatingCaps = false
570 default:
571 return ircError{&irc.Message{
572 Command: err_invalidcapcmd,
573 Params: []string{replyTo, cmd, "Unknown CAP command"},
574 }}
575 }
576 return nil
577}
578
579func (dc *downstreamConn) setSupportedCap(name, value string) {
580 prevValue, hasPrev := dc.supportedCaps[name]
581 changed := !hasPrev || prevValue != value
582 dc.supportedCaps[name] = value
583
584 if !dc.caps["cap-notify"] || !changed {
585 return
586 }
587
588 replyTo := dc.nick
589 if !dc.registered {
590 replyTo = "*"
591 }
592
593 cap := name
594 if value != "" && dc.capVersion >= 302 {
595 cap = name + "=" + value
596 }
597
598 dc.SendMessage(&irc.Message{
599 Prefix: dc.srv.prefix(),
600 Command: "CAP",
601 Params: []string{replyTo, "NEW", cap},
602 })
603}
604
605func (dc *downstreamConn) unsetSupportedCap(name string) {
606 _, hasPrev := dc.supportedCaps[name]
607 delete(dc.supportedCaps, name)
608 delete(dc.caps, name)
609
610 if !dc.caps["cap-notify"] || !hasPrev {
611 return
612 }
613
614 replyTo := dc.nick
615 if !dc.registered {
616 replyTo = "*"
617 }
618
619 dc.SendMessage(&irc.Message{
620 Prefix: dc.srv.prefix(),
621 Command: "CAP",
622 Params: []string{replyTo, "DEL", name},
623 })
624}
625
626func (dc *downstreamConn) updateSupportedCaps() {
627 supportedCaps := make(map[string]bool)
628 for cap := range needAllDownstreamCaps {
629 supportedCaps[cap] = true
630 }
631 dc.forEachUpstream(func(uc *upstreamConn) {
632 for cap, supported := range supportedCaps {
633 supportedCaps[cap] = supported && uc.caps[cap]
634 }
635 })
636
637 for cap, supported := range supportedCaps {
638 if supported {
639 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
640 } else {
641 dc.unsetSupportedCap(cap)
642 }
643 }
644}
645
646func (dc *downstreamConn) updateNick() {
647 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
648 dc.SendMessage(&irc.Message{
649 Prefix: dc.prefix(),
650 Command: "NICK",
651 Params: []string{uc.nick},
652 })
653 dc.nick = uc.nick
654 }
655}
656
657func sanityCheckServer(addr string) error {
658 dialer := net.Dialer{Timeout: 30 * time.Second}
659 conn, err := tls.DialWithDialer(&dialer, "tcp", addr, nil)
660 if err != nil {
661 return err
662 }
663 return conn.Close()
664}
665
666func unmarshalUsername(rawUsername string) (username, client, network string) {
667 username = rawUsername
668
669 i := strings.IndexAny(username, "/@")
670 j := strings.LastIndexAny(username, "/@")
671 if i >= 0 {
672 username = rawUsername[:i]
673 }
674 if j >= 0 {
675 if rawUsername[j] == '@' {
676 client = rawUsername[j+1:]
677 } else {
678 network = rawUsername[j+1:]
679 }
680 }
681 if i >= 0 && j >= 0 && i < j {
682 if rawUsername[i] == '@' {
683 client = rawUsername[i+1 : j]
684 } else {
685 network = rawUsername[i+1 : j]
686 }
687 }
688
689 return username, client, network
690}
691
692func (dc *downstreamConn) authenticate(username, password string) error {
693 username, clientName, networkName := unmarshalUsername(username)
694
695 u, err := dc.srv.db.GetUser(username)
696 if err != nil {
697 dc.logger.Printf("failed authentication for %q: %v", username, err)
698 return errAuthFailed
699 }
700
701 // Password auth disabled
702 if u.Password == "" {
703 return errAuthFailed
704 }
705
706 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
707 if err != nil {
708 dc.logger.Printf("failed authentication for %q: %v", username, err)
709 return errAuthFailed
710 }
711
712 dc.user = dc.srv.getUser(username)
713 if dc.user == nil {
714 dc.logger.Printf("failed authentication for %q: user not active", username)
715 return errAuthFailed
716 }
717 dc.clientName = clientName
718 dc.networkName = networkName
719 return nil
720}
721
722func (dc *downstreamConn) register() error {
723 if dc.registered {
724 return fmt.Errorf("tried to register twice")
725 }
726
727 password := dc.password
728 dc.password = ""
729 if dc.user == nil {
730 if err := dc.authenticate(dc.rawUsername, password); err != nil {
731 return err
732 }
733 }
734
735 if dc.clientName == "" && dc.networkName == "" {
736 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
737 }
738
739 dc.registered = true
740 dc.logger.Printf("registration complete for user %q", dc.user.Username)
741 return nil
742}
743
744func (dc *downstreamConn) loadNetwork() error {
745 if dc.networkName == "" {
746 return nil
747 }
748
749 network := dc.user.getNetwork(dc.networkName)
750 if network == nil {
751 addr := dc.networkName
752 if !strings.ContainsRune(addr, ':') {
753 addr = addr + ":6697"
754 }
755
756 dc.logger.Printf("trying to connect to new network %q", addr)
757 if err := sanityCheckServer(addr); err != nil {
758 dc.logger.Printf("failed to connect to %q: %v", addr, err)
759 return ircError{&irc.Message{
760 Command: irc.ERR_PASSWDMISMATCH,
761 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
762 }}
763 }
764
765 // Some clients only allow specifying the nickname (and use the
766 // nickname as a username too). Strip the network name from the
767 // nickname when auto-saving networks.
768 nick, _, _ := unmarshalUsername(dc.nick)
769
770 dc.logger.Printf("auto-saving network %q", dc.networkName)
771 var err error
772 network, err = dc.user.createNetwork(&Network{
773 Addr: dc.networkName,
774 Nick: nick,
775 })
776 if err != nil {
777 return err
778 }
779 }
780
781 dc.network = network
782 return nil
783}
784
785func (dc *downstreamConn) welcome() error {
786 if dc.user == nil || !dc.registered {
787 panic("tried to welcome an unregistered connection")
788 }
789
790 // TODO: doing this might take some time. We should do it in dc.register
791 // instead, but we'll potentially be adding a new network and this must be
792 // done in the user goroutine.
793 if err := dc.loadNetwork(); err != nil {
794 return err
795 }
796
797 dc.SendMessage(&irc.Message{
798 Prefix: dc.srv.prefix(),
799 Command: irc.RPL_WELCOME,
800 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
801 })
802 dc.SendMessage(&irc.Message{
803 Prefix: dc.srv.prefix(),
804 Command: irc.RPL_YOURHOST,
805 Params: []string{dc.nick, "Your host is " + dc.srv.Hostname},
806 })
807 dc.SendMessage(&irc.Message{
808 Prefix: dc.srv.prefix(),
809 Command: irc.RPL_CREATED,
810 Params: []string{dc.nick, "Who cares when the server was created?"},
811 })
812 dc.SendMessage(&irc.Message{
813 Prefix: dc.srv.prefix(),
814 Command: irc.RPL_MYINFO,
815 Params: []string{dc.nick, dc.srv.Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
816 })
817 // TODO: RPL_ISUPPORT
818 // TODO: send CHATHISTORY in RPL_ISUPPORT when implemented
819 dc.SendMessage(&irc.Message{
820 Prefix: dc.srv.prefix(),
821 Command: irc.ERR_NOMOTD,
822 Params: []string{dc.nick, "No MOTD"},
823 })
824
825 dc.updateNick()
826
827 dc.forEachUpstream(func(uc *upstreamConn) {
828 for _, ch := range uc.channels {
829 if !ch.complete {
830 continue
831 }
832 if record, ok := uc.network.channels[ch.Name]; ok && record.Detached {
833 continue
834 }
835
836 dc.SendMessage(&irc.Message{
837 Prefix: dc.prefix(),
838 Command: "JOIN",
839 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
840 })
841
842 forwardChannel(dc, ch)
843 }
844 })
845
846 dc.forEachNetwork(func(net *network) {
847 // Only send history if we're the first connected client with that name
848 // for the network
849 if _, ok := net.offlineClients[dc.clientName]; ok {
850 dc.sendNetworkHistory(net)
851 delete(net.offlineClients, dc.clientName)
852 }
853 })
854
855 return nil
856}
857
858func (dc *downstreamConn) sendNetworkHistory(net *network) {
859 if dc.caps["draft/chathistory"] {
860 return
861 }
862 for target, history := range net.history {
863 if ch, ok := net.channels[target]; ok && ch.Detached {
864 continue
865 }
866
867 seq, ok := history.clients[dc.clientName]
868 if !ok {
869 continue
870 }
871 history.clients[dc.clientName] = history.ring.Cur()
872
873 consumer := history.ring.NewConsumer(seq)
874
875 batchRef := "history"
876 if dc.caps["batch"] {
877 dc.SendMessage(&irc.Message{
878 Prefix: dc.srv.prefix(),
879 Command: "BATCH",
880 Params: []string{"+" + batchRef, "chathistory", dc.marshalEntity(net, target)},
881 })
882 }
883
884 for {
885 msg := consumer.Consume()
886 if msg == nil {
887 break
888 }
889
890 // Don't replay all messages, because that would mess up client
891 // state. For instance we just sent the list of users, sending
892 // PART messages for one of these users would be incorrect.
893 ignore := true
894 switch msg.Command {
895 case "PRIVMSG", "NOTICE":
896 ignore = false
897 }
898 if ignore {
899 continue
900 }
901
902 if dc.caps["batch"] {
903 msg = msg.Copy()
904 msg.Tags["batch"] = irc.TagValue(batchRef)
905 }
906
907 dc.SendMessage(dc.marshalMessage(msg, net))
908 }
909
910 if dc.caps["batch"] {
911 dc.SendMessage(&irc.Message{
912 Prefix: dc.srv.prefix(),
913 Command: "BATCH",
914 Params: []string{"-" + batchRef},
915 })
916 }
917 }
918}
919
920func (dc *downstreamConn) runUntilRegistered() error {
921 for !dc.registered {
922 msg, err := dc.ReadMessage()
923 if err != nil {
924 return fmt.Errorf("failed to read IRC command: %v", err)
925 }
926
927 err = dc.handleMessage(msg)
928 if ircErr, ok := err.(ircError); ok {
929 ircErr.Message.Prefix = dc.srv.prefix()
930 dc.SendMessage(ircErr.Message)
931 } else if err != nil {
932 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
933 }
934 }
935
936 return nil
937}
938
939func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
940 switch msg.Command {
941 case "CAP":
942 var subCmd string
943 if err := parseMessageParams(msg, &subCmd); err != nil {
944 return err
945 }
946 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
947 return err
948 }
949 case "PING":
950 dc.SendMessage(&irc.Message{
951 Prefix: dc.srv.prefix(),
952 Command: "PONG",
953 Params: msg.Params,
954 })
955 return nil
956 case "USER":
957 return ircError{&irc.Message{
958 Command: irc.ERR_ALREADYREGISTERED,
959 Params: []string{dc.nick, "You may not reregister"},
960 }}
961 case "NICK":
962 var nick string
963 if err := parseMessageParams(msg, &nick); err != nil {
964 return err
965 }
966
967 var upstream *upstreamConn
968 if dc.upstream() == nil {
969 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
970 if err == nil { // NICK nick/network: NICK only on a specific upstream
971 upstream = uc
972 nick = unmarshaledNick
973 }
974 }
975
976 if strings.ContainsAny(nick, illegalNickChars) {
977 return ircError{&irc.Message{
978 Command: irc.ERR_ERRONEUSNICKNAME,
979 Params: []string{dc.nick, nick, "contains illegal characters"},
980 }}
981 }
982
983 var err error
984 dc.forEachNetwork(func(n *network) {
985 if err != nil || (upstream != nil && upstream.network != n) {
986 return
987 }
988 n.Nick = nick
989 err = dc.srv.db.StoreNetwork(dc.user.Username, &n.Network)
990 })
991 if err != nil {
992 return err
993 }
994
995 dc.forEachUpstream(func(uc *upstreamConn) {
996 if upstream != nil && upstream != uc {
997 return
998 }
999 uc.SendMessageLabeled(dc.id, &irc.Message{
1000 Command: "NICK",
1001 Params: []string{nick},
1002 })
1003 })
1004
1005 if dc.upstream() == nil && dc.nick != nick {
1006 dc.SendMessage(&irc.Message{
1007 Prefix: dc.prefix(),
1008 Command: "NICK",
1009 Params: []string{nick},
1010 })
1011 dc.nick = nick
1012 }
1013 case "JOIN":
1014 var namesStr string
1015 if err := parseMessageParams(msg, &namesStr); err != nil {
1016 return err
1017 }
1018
1019 var keys []string
1020 if len(msg.Params) > 1 {
1021 keys = strings.Split(msg.Params[1], ",")
1022 }
1023
1024 for i, name := range strings.Split(namesStr, ",") {
1025 uc, upstreamName, err := dc.unmarshalEntity(name)
1026 if err != nil {
1027 return err
1028 }
1029
1030 var key string
1031 if len(keys) > i {
1032 key = keys[i]
1033 }
1034
1035 params := []string{upstreamName}
1036 if key != "" {
1037 params = append(params, key)
1038 }
1039 uc.SendMessageLabeled(dc.id, &irc.Message{
1040 Command: "JOIN",
1041 Params: params,
1042 })
1043
1044 ch := &Channel{Name: upstreamName, Key: key, Detached: false}
1045 if current, ok := uc.network.channels[ch.Name]; ok && key == "" {
1046 // Don't clear the channel key if there's one set
1047 // TODO: add a way to unset the channel key
1048 ch.Key = current.Key
1049 }
1050 if err := uc.network.createUpdateChannel(ch); err != nil {
1051 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1052 }
1053 }
1054 case "PART":
1055 var namesStr string
1056 if err := parseMessageParams(msg, &namesStr); err != nil {
1057 return err
1058 }
1059
1060 var reason string
1061 if len(msg.Params) > 1 {
1062 reason = msg.Params[1]
1063 }
1064
1065 for _, name := range strings.Split(namesStr, ",") {
1066 uc, upstreamName, err := dc.unmarshalEntity(name)
1067 if err != nil {
1068 return err
1069 }
1070
1071 if strings.EqualFold(reason, "detach") {
1072 ch := &Channel{Name: upstreamName, Detached: true}
1073 if err := uc.network.createUpdateChannel(ch); err != nil {
1074 dc.logger.Printf("failed to detach channel %q: %v", upstreamName, err)
1075 }
1076 } else {
1077 params := []string{upstreamName}
1078 if reason != "" {
1079 params = append(params, reason)
1080 }
1081 uc.SendMessageLabeled(dc.id, &irc.Message{
1082 Command: "PART",
1083 Params: params,
1084 })
1085
1086 if err := uc.network.deleteChannel(upstreamName); err != nil {
1087 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1088 }
1089 }
1090 }
1091 case "KICK":
1092 var channelStr, userStr string
1093 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1094 return err
1095 }
1096
1097 channels := strings.Split(channelStr, ",")
1098 users := strings.Split(userStr, ",")
1099
1100 var reason string
1101 if len(msg.Params) > 2 {
1102 reason = msg.Params[2]
1103 }
1104
1105 if len(channels) != 1 && len(channels) != len(users) {
1106 return ircError{&irc.Message{
1107 Command: irc.ERR_BADCHANMASK,
1108 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1109 }}
1110 }
1111
1112 for i, user := range users {
1113 var channel string
1114 if len(channels) == 1 {
1115 channel = channels[0]
1116 } else {
1117 channel = channels[i]
1118 }
1119
1120 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1121 if err != nil {
1122 return err
1123 }
1124
1125 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1126 if err != nil {
1127 return err
1128 }
1129
1130 if ucChannel != ucUser {
1131 return ircError{&irc.Message{
1132 Command: irc.ERR_USERNOTINCHANNEL,
1133 Params: []string{dc.nick, user, channel, "They are on another network"},
1134 }}
1135 }
1136 uc := ucChannel
1137
1138 params := []string{upstreamChannel, upstreamUser}
1139 if reason != "" {
1140 params = append(params, reason)
1141 }
1142 uc.SendMessageLabeled(dc.id, &irc.Message{
1143 Command: "KICK",
1144 Params: params,
1145 })
1146 }
1147 case "MODE":
1148 var name string
1149 if err := parseMessageParams(msg, &name); err != nil {
1150 return err
1151 }
1152
1153 var modeStr string
1154 if len(msg.Params) > 1 {
1155 modeStr = msg.Params[1]
1156 }
1157
1158 if name == dc.nick {
1159 if modeStr != "" {
1160 dc.forEachUpstream(func(uc *upstreamConn) {
1161 uc.SendMessageLabeled(dc.id, &irc.Message{
1162 Command: "MODE",
1163 Params: []string{uc.nick, modeStr},
1164 })
1165 })
1166 } else {
1167 dc.SendMessage(&irc.Message{
1168 Prefix: dc.srv.prefix(),
1169 Command: irc.RPL_UMODEIS,
1170 Params: []string{dc.nick, ""}, // TODO
1171 })
1172 }
1173 return nil
1174 }
1175
1176 uc, upstreamName, err := dc.unmarshalEntity(name)
1177 if err != nil {
1178 return err
1179 }
1180
1181 if !uc.isChannel(upstreamName) {
1182 return ircError{&irc.Message{
1183 Command: irc.ERR_USERSDONTMATCH,
1184 Params: []string{dc.nick, "Cannot change mode for other users"},
1185 }}
1186 }
1187
1188 if modeStr != "" {
1189 params := []string{upstreamName, modeStr}
1190 params = append(params, msg.Params[2:]...)
1191 uc.SendMessageLabeled(dc.id, &irc.Message{
1192 Command: "MODE",
1193 Params: params,
1194 })
1195 } else {
1196 ch, ok := uc.channels[upstreamName]
1197 if !ok {
1198 return ircError{&irc.Message{
1199 Command: irc.ERR_NOSUCHCHANNEL,
1200 Params: []string{dc.nick, name, "No such channel"},
1201 }}
1202 }
1203
1204 if ch.modes == nil {
1205 // we haven't received the initial RPL_CHANNELMODEIS yet
1206 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1207 return nil
1208 }
1209
1210 modeStr, modeParams := ch.modes.Format()
1211 params := []string{dc.nick, name, modeStr}
1212 params = append(params, modeParams...)
1213
1214 dc.SendMessage(&irc.Message{
1215 Prefix: dc.srv.prefix(),
1216 Command: irc.RPL_CHANNELMODEIS,
1217 Params: params,
1218 })
1219 if ch.creationTime != "" {
1220 dc.SendMessage(&irc.Message{
1221 Prefix: dc.srv.prefix(),
1222 Command: rpl_creationtime,
1223 Params: []string{dc.nick, name, ch.creationTime},
1224 })
1225 }
1226 }
1227 case "TOPIC":
1228 var channel string
1229 if err := parseMessageParams(msg, &channel); err != nil {
1230 return err
1231 }
1232
1233 uc, upstreamChannel, err := dc.unmarshalEntity(channel)
1234 if err != nil {
1235 return err
1236 }
1237
1238 if len(msg.Params) > 1 { // setting topic
1239 topic := msg.Params[1]
1240 uc.SendMessageLabeled(dc.id, &irc.Message{
1241 Command: "TOPIC",
1242 Params: []string{upstreamChannel, topic},
1243 })
1244 } else { // getting topic
1245 ch, ok := uc.channels[upstreamChannel]
1246 if !ok {
1247 return ircError{&irc.Message{
1248 Command: irc.ERR_NOSUCHCHANNEL,
1249 Params: []string{dc.nick, upstreamChannel, "No such channel"},
1250 }}
1251 }
1252 sendTopic(dc, ch)
1253 }
1254 case "LIST":
1255 // TODO: support ELIST when supported by all upstreams
1256
1257 pl := pendingLIST{
1258 downstreamID: dc.id,
1259 pendingCommands: make(map[int64]*irc.Message),
1260 }
1261 var upstream *upstreamConn
1262 var upstreamChannels map[int64][]string
1263 if len(msg.Params) > 0 {
1264 uc, upstreamMask, err := dc.unmarshalEntity(msg.Params[0])
1265 if err == nil && upstreamMask == "*" { // LIST */network: send LIST only to one network
1266 upstream = uc
1267 } else {
1268 upstreamChannels = make(map[int64][]string)
1269 channels := strings.Split(msg.Params[0], ",")
1270 for _, channel := range channels {
1271 uc, upstreamChannel, err := dc.unmarshalEntity(channel)
1272 if err != nil {
1273 return err
1274 }
1275 upstreamChannels[uc.network.ID] = append(upstreamChannels[uc.network.ID], upstreamChannel)
1276 }
1277 }
1278 }
1279
1280 dc.user.pendingLISTs = append(dc.user.pendingLISTs, pl)
1281 dc.forEachUpstream(func(uc *upstreamConn) {
1282 if upstream != nil && upstream != uc {
1283 return
1284 }
1285 var params []string
1286 if upstreamChannels != nil {
1287 if channels, ok := upstreamChannels[uc.network.ID]; ok {
1288 params = []string{strings.Join(channels, ",")}
1289 } else {
1290 return
1291 }
1292 }
1293 pl.pendingCommands[uc.network.ID] = &irc.Message{
1294 Command: "LIST",
1295 Params: params,
1296 }
1297 uc.trySendLIST(dc.id)
1298 })
1299 case "NAMES":
1300 if len(msg.Params) == 0 {
1301 dc.SendMessage(&irc.Message{
1302 Prefix: dc.srv.prefix(),
1303 Command: irc.RPL_ENDOFNAMES,
1304 Params: []string{dc.nick, "*", "End of /NAMES list"},
1305 })
1306 return nil
1307 }
1308
1309 channels := strings.Split(msg.Params[0], ",")
1310 for _, channel := range channels {
1311 uc, upstreamChannel, err := dc.unmarshalEntity(channel)
1312 if err != nil {
1313 return err
1314 }
1315
1316 ch, ok := uc.channels[upstreamChannel]
1317 if ok {
1318 sendNames(dc, ch)
1319 } else {
1320 // NAMES on a channel we have not joined, ask upstream
1321 uc.SendMessageLabeled(dc.id, &irc.Message{
1322 Command: "NAMES",
1323 Params: []string{upstreamChannel},
1324 })
1325 }
1326 }
1327 case "WHO":
1328 if len(msg.Params) == 0 {
1329 // TODO: support WHO without parameters
1330 dc.SendMessage(&irc.Message{
1331 Prefix: dc.srv.prefix(),
1332 Command: irc.RPL_ENDOFWHO,
1333 Params: []string{dc.nick, "*", "End of /WHO list"},
1334 })
1335 return nil
1336 }
1337
1338 // TODO: support WHO masks
1339 entity := msg.Params[0]
1340
1341 if entity == dc.nick {
1342 // TODO: support AWAY (H/G) in self WHO reply
1343 dc.SendMessage(&irc.Message{
1344 Prefix: dc.srv.prefix(),
1345 Command: irc.RPL_WHOREPLY,
1346 Params: []string{dc.nick, "*", dc.user.Username, dc.hostname, dc.srv.Hostname, dc.nick, "H", "0 " + dc.realname},
1347 })
1348 dc.SendMessage(&irc.Message{
1349 Prefix: dc.srv.prefix(),
1350 Command: irc.RPL_ENDOFWHO,
1351 Params: []string{dc.nick, dc.nick, "End of /WHO list"},
1352 })
1353 return nil
1354 }
1355 if entity == serviceNick {
1356 dc.SendMessage(&irc.Message{
1357 Prefix: dc.srv.prefix(),
1358 Command: irc.RPL_WHOREPLY,
1359 Params: []string{serviceNick, "*", servicePrefix.User, servicePrefix.Host, dc.srv.Hostname, serviceNick, "H", "0 " + serviceRealname},
1360 })
1361 dc.SendMessage(&irc.Message{
1362 Prefix: dc.srv.prefix(),
1363 Command: irc.RPL_ENDOFWHO,
1364 Params: []string{dc.nick, serviceNick, "End of /WHO list"},
1365 })
1366 return nil
1367 }
1368
1369 uc, upstreamName, err := dc.unmarshalEntity(entity)
1370 if err != nil {
1371 return err
1372 }
1373
1374 var params []string
1375 if len(msg.Params) == 2 {
1376 params = []string{upstreamName, msg.Params[1]}
1377 } else {
1378 params = []string{upstreamName}
1379 }
1380
1381 uc.SendMessageLabeled(dc.id, &irc.Message{
1382 Command: "WHO",
1383 Params: params,
1384 })
1385 case "WHOIS":
1386 if len(msg.Params) == 0 {
1387 return ircError{&irc.Message{
1388 Command: irc.ERR_NONICKNAMEGIVEN,
1389 Params: []string{dc.nick, "No nickname given"},
1390 }}
1391 }
1392
1393 var target, mask string
1394 if len(msg.Params) == 1 {
1395 target = ""
1396 mask = msg.Params[0]
1397 } else {
1398 target = msg.Params[0]
1399 mask = msg.Params[1]
1400 }
1401 // TODO: support multiple WHOIS users
1402 if i := strings.IndexByte(mask, ','); i >= 0 {
1403 mask = mask[:i]
1404 }
1405
1406 if mask == dc.nick {
1407 dc.SendMessage(&irc.Message{
1408 Prefix: dc.srv.prefix(),
1409 Command: irc.RPL_WHOISUSER,
1410 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
1411 })
1412 dc.SendMessage(&irc.Message{
1413 Prefix: dc.srv.prefix(),
1414 Command: irc.RPL_WHOISSERVER,
1415 Params: []string{dc.nick, dc.nick, dc.srv.Hostname, "soju"},
1416 })
1417 dc.SendMessage(&irc.Message{
1418 Prefix: dc.srv.prefix(),
1419 Command: irc.RPL_ENDOFWHOIS,
1420 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
1421 })
1422 return nil
1423 }
1424
1425 // TODO: support WHOIS masks
1426 uc, upstreamNick, err := dc.unmarshalEntity(mask)
1427 if err != nil {
1428 return err
1429 }
1430
1431 var params []string
1432 if target != "" {
1433 if target == mask { // WHOIS nick nick
1434 params = []string{upstreamNick, upstreamNick}
1435 } else {
1436 params = []string{target, upstreamNick}
1437 }
1438 } else {
1439 params = []string{upstreamNick}
1440 }
1441
1442 uc.SendMessageLabeled(dc.id, &irc.Message{
1443 Command: "WHOIS",
1444 Params: params,
1445 })
1446 case "PRIVMSG":
1447 var targetsStr, text string
1448 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
1449 return err
1450 }
1451 tags := copyClientTags(msg.Tags)
1452
1453 for _, name := range strings.Split(targetsStr, ",") {
1454 if name == serviceNick {
1455 handleServicePRIVMSG(dc, text)
1456 continue
1457 }
1458
1459 uc, upstreamName, err := dc.unmarshalEntity(name)
1460 if err != nil {
1461 return err
1462 }
1463
1464 if upstreamName == "NickServ" {
1465 dc.handleNickServPRIVMSG(uc, text)
1466 }
1467
1468 unmarshaledText := text
1469 if uc.isChannel(upstreamName) {
1470 unmarshaledText = dc.unmarshalText(uc, text)
1471 }
1472 uc.SendMessageLabeled(dc.id, &irc.Message{
1473 Tags: tags,
1474 Command: "PRIVMSG",
1475 Params: []string{upstreamName, unmarshaledText},
1476 })
1477
1478 echoTags := tags.Copy()
1479 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
1480 echoMsg := &irc.Message{
1481 Tags: echoTags,
1482 Prefix: &irc.Prefix{
1483 Name: uc.nick,
1484 User: uc.username,
1485 },
1486 Command: "PRIVMSG",
1487 Params: []string{upstreamName, text},
1488 }
1489 uc.produce(upstreamName, echoMsg, dc)
1490 }
1491 case "NOTICE":
1492 var targetsStr, text string
1493 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
1494 return err
1495 }
1496 tags := copyClientTags(msg.Tags)
1497
1498 for _, name := range strings.Split(targetsStr, ",") {
1499 uc, upstreamName, err := dc.unmarshalEntity(name)
1500 if err != nil {
1501 return err
1502 }
1503
1504 unmarshaledText := text
1505 if uc.isChannel(upstreamName) {
1506 unmarshaledText = dc.unmarshalText(uc, text)
1507 }
1508 uc.SendMessageLabeled(dc.id, &irc.Message{
1509 Tags: tags,
1510 Command: "NOTICE",
1511 Params: []string{upstreamName, unmarshaledText},
1512 })
1513 }
1514 case "TAGMSG":
1515 var targetsStr string
1516 if err := parseMessageParams(msg, &targetsStr); err != nil {
1517 return err
1518 }
1519 tags := copyClientTags(msg.Tags)
1520
1521 for _, name := range strings.Split(targetsStr, ",") {
1522 uc, upstreamName, err := dc.unmarshalEntity(name)
1523 if err != nil {
1524 return err
1525 }
1526
1527 uc.SendMessageLabeled(dc.id, &irc.Message{
1528 Tags: tags,
1529 Command: "TAGMSG",
1530 Params: []string{upstreamName},
1531 })
1532 }
1533 case "INVITE":
1534 var user, channel string
1535 if err := parseMessageParams(msg, &user, &channel); err != nil {
1536 return err
1537 }
1538
1539 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1540 if err != nil {
1541 return err
1542 }
1543
1544 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1545 if err != nil {
1546 return err
1547 }
1548
1549 if ucChannel != ucUser {
1550 return ircError{&irc.Message{
1551 Command: irc.ERR_USERNOTINCHANNEL,
1552 Params: []string{dc.nick, user, channel, "They are on another network"},
1553 }}
1554 }
1555 uc := ucChannel
1556
1557 uc.SendMessageLabeled(dc.id, &irc.Message{
1558 Command: "INVITE",
1559 Params: []string{upstreamUser, upstreamChannel},
1560 })
1561 case "CHATHISTORY":
1562 var subcommand string
1563 if err := parseMessageParams(msg, &subcommand); err != nil {
1564 return err
1565 }
1566 var target, criteria, limitStr string
1567 if err := parseMessageParams(msg, nil, &target, &criteria, &limitStr); err != nil {
1568 return ircError{&irc.Message{
1569 Command: "FAIL",
1570 Params: []string{"CHATHISTORY", "NEED_MORE_PARAMS", subcommand, "Missing parameters"},
1571 }}
1572 }
1573
1574 if dc.srv.LogPath == "" {
1575 return ircError{&irc.Message{
1576 Command: irc.ERR_UNKNOWNCOMMAND,
1577 Params: []string{dc.nick, subcommand, "Unknown command"},
1578 }}
1579 }
1580
1581 uc, entity, err := dc.unmarshalEntity(target)
1582 if err != nil {
1583 return err
1584 }
1585
1586 // TODO: support msgid criteria
1587 criteriaParts := strings.SplitN(criteria, "=", 2)
1588 if len(criteriaParts) != 2 || criteriaParts[0] != "timestamp" {
1589 return ircError{&irc.Message{
1590 Command: "FAIL",
1591 Params: []string{"CHATHISTORY", "UNKNOWN_CRITERIA", criteria, "Unknown criteria"},
1592 }}
1593 }
1594
1595 timestamp, err := time.Parse(serverTimeLayout, criteriaParts[1])
1596 if err != nil {
1597 return ircError{&irc.Message{
1598 Command: "FAIL",
1599 Params: []string{"CHATHISTORY", "INVALID_CRITERIA", criteria, "Invalid criteria"},
1600 }}
1601 }
1602
1603 limit, err := strconv.Atoi(limitStr)
1604 if err != nil || limit < 0 || limit > dc.srv.HistoryLimit {
1605 return ircError{&irc.Message{
1606 Command: "FAIL",
1607 Params: []string{"CHATHISTORY", "INVALID_LIMIT", limitStr, "Invalid limit"},
1608 }}
1609 }
1610
1611 var history []*irc.Message
1612 switch subcommand {
1613 case "BEFORE":
1614 history, err = loadHistoryBeforeTime(uc.network, entity, timestamp, limit)
1615 case "AFTER":
1616 history, err = loadHistoryAfterTime(uc.network, entity, timestamp, limit)
1617 default:
1618 // TODO: support LATEST, BETWEEN
1619 return ircError{&irc.Message{
1620 Command: "FAIL",
1621 Params: []string{"CHATHISTORY", "UNKNOWN_COMMAND", subcommand, "Unknown command"},
1622 }}
1623 }
1624 if err != nil {
1625 dc.logger.Printf("failed parsing log messages for chathistory: %v", err)
1626 return newChatHistoryError(subcommand, target)
1627 }
1628
1629 batchRef := "history"
1630 dc.SendMessage(&irc.Message{
1631 Prefix: dc.srv.prefix(),
1632 Command: "BATCH",
1633 Params: []string{"+" + batchRef, "chathistory", target},
1634 })
1635
1636 for _, msg := range history {
1637 msg.Tags["batch"] = irc.TagValue(batchRef)
1638 dc.SendMessage(dc.marshalMessage(msg, uc.network))
1639 }
1640
1641 dc.SendMessage(&irc.Message{
1642 Prefix: dc.srv.prefix(),
1643 Command: "BATCH",
1644 Params: []string{"-" + batchRef},
1645 })
1646 default:
1647 dc.logger.Printf("unhandled message: %v", msg)
1648 return newUnknownCommandError(msg.Command)
1649 }
1650 return nil
1651}
1652
1653func (dc *downstreamConn) handleNickServPRIVMSG(uc *upstreamConn, text string) {
1654 username, password, ok := parseNickServCredentials(text, uc.nick)
1655 if !ok {
1656 return
1657 }
1658
1659 // User may have e.g. EXTERNAL mechanism configured. We do not want to
1660 // automatically erase the key pair or any other credentials.
1661 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
1662 return
1663 }
1664
1665 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
1666 n := uc.network
1667 n.SASL.Mechanism = "PLAIN"
1668 n.SASL.Plain.Username = username
1669 n.SASL.Plain.Password = password
1670 if err := dc.srv.db.StoreNetwork(dc.user.Username, &n.Network); err != nil {
1671 dc.logger.Printf("failed to save NickServ credentials: %v", err)
1672 }
1673}
1674
1675func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
1676 fields := strings.Fields(text)
1677 if len(fields) < 2 {
1678 return "", "", false
1679 }
1680 cmd := strings.ToUpper(fields[0])
1681 params := fields[1:]
1682 switch cmd {
1683 case "REGISTER":
1684 username = nick
1685 password = params[0]
1686 case "IDENTIFY":
1687 if len(params) == 1 {
1688 username = nick
1689 password = params[0]
1690 } else {
1691 username = params[0]
1692 password = params[1]
1693 }
1694 case "SET":
1695 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
1696 username = nick
1697 password = params[1]
1698 }
1699 default:
1700 return "", "", false
1701 }
1702 return username, password, true
1703}
Note: See TracBrowser for help on using the repository browser.