source: code/trunk/downstream.go@ 633

Last change on this file since 633 was 629, checked in by contact, 4 years ago

Stop sending RPL_CREATED

There's no point in sending this numeric if it doesn't contain any
useful info.
File size: 61.8 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
60func parseBouncerNetID(subcommand, s string) (int64, error) {
61 id, err := strconv.ParseInt(s, 10, 64)
62 if err != nil {
63 return 0, ircError{&irc.Message{
64 Command: "FAIL",
65 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, s, "Invalid network ID"},
66 }}
67 }
68 return id, nil
69}
70
71func getNetworkAttrs(network *network) irc.Tags {
72 state := "disconnected"
73 if uc := network.conn; uc != nil {
74 state = "connected"
75 }
76
77 attrs := irc.Tags{
78 "name": irc.TagValue(network.GetName()),
79 "state": irc.TagValue(state),
80 "nickname": irc.TagValue(network.Nick),
81 }
82
83 if network.Username != "" {
84 attrs["username"] = irc.TagValue(network.Username)
85 }
86 if realname := GetRealname(&network.user.User, &network.Network); realname != "" {
87 attrs["realname"] = irc.TagValue(realname)
88 }
89
90 if u, err := network.URL(); err == nil {
91 hasHostPort := true
92 switch u.Scheme {
93 case "ircs":
94 attrs["tls"] = irc.TagValue("1")
95 case "irc+insecure":
96 attrs["tls"] = irc.TagValue("0")
97 default:
98 hasHostPort = false
99 }
100 if host, port, err := net.SplitHostPort(u.Host); err == nil && hasHostPort {
101 attrs["host"] = irc.TagValue(host)
102 attrs["port"] = irc.TagValue(port)
103 } else if hasHostPort {
104 attrs["host"] = irc.TagValue(u.Host)
105 }
106 }
107
108 return attrs
109}
110
111// ' ' and ':' break the IRC message wire format, '@' and '!' break prefixes,
112// '*' and '?' break masks, '$' breaks server masks in PRIVMSG/NOTICE
113const illegalNickChars = " :@!*?$"
114
115// permanentDownstreamCaps is the list of always-supported downstream
116// capabilities.
117var permanentDownstreamCaps = map[string]string{
118 "batch": "",
119 "cap-notify": "",
120 "echo-message": "",
121 "invite-notify": "",
122 "message-tags": "",
123 "sasl": "PLAIN",
124 "server-time": "",
125 "setname": "",
126
127 "soju.im/bouncer-networks": "",
128 "soju.im/bouncer-networks-notify": "",
129}
130
131// needAllDownstreamCaps is the list of downstream capabilities that
132// require support from all upstreams to be enabled
133var needAllDownstreamCaps = map[string]string{
134 "account-tag": "",
135 "away-notify": "",
136 "extended-join": "",
137 "multi-prefix": "",
138}
139
140// passthroughIsupport is the set of ISUPPORT tokens that are directly passed
141// through from the upstream server to downstream clients.
142//
143// This is only effective in single-upstream mode.
144var passthroughIsupport = map[string]bool{
145 "AWAYLEN": true,
146 "BOT": true,
147 "CHANLIMIT": true,
148 "CHANMODES": true,
149 "CHANNELLEN": true,
150 "CHANTYPES": true,
151 "CLIENTTAGDENY": true,
152 "EXCEPTS": true,
153 "EXTBAN": true,
154 "HOSTLEN": true,
155 "INVEX": true,
156 "KICKLEN": true,
157 "MAXLIST": true,
158 "MAXTARGETS": true,
159 "MODES": true,
160 "NAMELEN": true,
161 "NETWORK": true,
162 "NICKLEN": true,
163 "PREFIX": true,
164 "SAFELIST": true,
165 "TARGMAX": true,
166 "TOPICLEN": true,
167 "USERLEN": true,
168 "UTF8ONLY": true,
169}
170
171type downstreamConn struct {
172 conn
173
174 id uint64
175
176 registered bool
177 user *user
178 nick string
179 nickCM string
180 rawUsername string
181 networkName string
182 clientName string
183 realname string
184 hostname string
185 password string // empty after authentication
186 network *network // can be nil
187
188 negotiatingCaps bool
189 capVersion int
190 supportedCaps map[string]string
191 caps map[string]bool
192
193 lastBatchRef uint64
194
195 saslServer sasl.Server
196}
197
198func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
199 remoteAddr := ic.RemoteAddr().String()
200 logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
201 options := connOptions{Logger: logger}
202 dc := &downstreamConn{
203 conn: *newConn(srv, ic, &options),
204 id: id,
205 supportedCaps: make(map[string]string),
206 caps: make(map[string]bool),
207 }
208 dc.hostname = remoteAddr
209 if host, _, err := net.SplitHostPort(dc.hostname); err == nil {
210 dc.hostname = host
211 }
212 for k, v := range permanentDownstreamCaps {
213 dc.supportedCaps[k] = v
214 }
215 if srv.LogPath != "" {
216 dc.supportedCaps["draft/chathistory"] = ""
217 }
218 return dc
219}
220
221func (dc *downstreamConn) prefix() *irc.Prefix {
222 return &irc.Prefix{
223 Name: dc.nick,
224 User: dc.user.Username,
225 Host: dc.hostname,
226 }
227}
228
229func (dc *downstreamConn) forEachNetwork(f func(*network)) {
230 if dc.network != nil {
231 f(dc.network)
232 } else if !dc.caps["soju.im/bouncer-networks"] {
233 dc.user.forEachNetwork(f)
234 }
235}
236
237func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
238 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
239 return
240 }
241 dc.user.forEachUpstream(func(uc *upstreamConn) {
242 if dc.network != nil && uc.network != dc.network {
243 return
244 }
245 f(uc)
246 })
247}
248
249// upstream returns the upstream connection, if any. If there are zero or if
250// there are multiple upstream connections, it returns nil.
251func (dc *downstreamConn) upstream() *upstreamConn {
252 if dc.network == nil {
253 return nil
254 }
255 return dc.network.conn
256}
257
258func isOurNick(net *network, nick string) bool {
259 // TODO: this doesn't account for nick changes
260 if net.conn != nil {
261 return net.casemap(nick) == net.conn.nickCM
262 }
263 // We're not currently connected to the upstream connection, so we don't
264 // know whether this name is our nickname. Best-effort: use the network's
265 // configured nickname and hope it was the one being used when we were
266 // connected.
267 return net.casemap(nick) == net.casemap(net.Nick)
268}
269
270// marshalEntity converts an upstream entity name (ie. channel or nick) into a
271// downstream entity name.
272//
273// This involves adding a "/<network>" suffix if the entity isn't the current
274// user.
275func (dc *downstreamConn) marshalEntity(net *network, name string) string {
276 if isOurNick(net, name) {
277 return dc.nick
278 }
279 name = partialCasemap(net.casemap, name)
280 if dc.network != nil {
281 if dc.network != net {
282 panic("soju: tried to marshal an entity for another network")
283 }
284 return name
285 }
286 return name + "/" + net.GetName()
287}
288
289func (dc *downstreamConn) marshalUserPrefix(net *network, prefix *irc.Prefix) *irc.Prefix {
290 if isOurNick(net, prefix.Name) {
291 return dc.prefix()
292 }
293 prefix.Name = partialCasemap(net.casemap, prefix.Name)
294 if dc.network != nil {
295 if dc.network != net {
296 panic("soju: tried to marshal a user prefix for another network")
297 }
298 return prefix
299 }
300 return &irc.Prefix{
301 Name: prefix.Name + "/" + net.GetName(),
302 User: prefix.User,
303 Host: prefix.Host,
304 }
305}
306
307// unmarshalEntityNetwork converts a downstream entity name (ie. channel or
308// nick) into an upstream entity name.
309//
310// This involves removing the "/<network>" suffix.
311func (dc *downstreamConn) unmarshalEntityNetwork(name string) (*network, string, error) {
312 if dc.network != nil {
313 return dc.network, name, nil
314 }
315
316 var net *network
317 if i := strings.LastIndexByte(name, '/'); i >= 0 {
318 network := name[i+1:]
319 name = name[:i]
320
321 for _, n := range dc.user.networks {
322 if network == n.GetName() {
323 net = n
324 break
325 }
326 }
327 }
328
329 if net == nil {
330 return nil, "", ircError{&irc.Message{
331 Command: irc.ERR_NOSUCHCHANNEL,
332 Params: []string{name, "Missing network suffix in name"},
333 }}
334 }
335
336 return net, name, nil
337}
338
339// unmarshalEntity is the same as unmarshalEntityNetwork, but returns the
340// upstream connection and fails if the upstream is disconnected.
341func (dc *downstreamConn) unmarshalEntity(name string) (*upstreamConn, string, error) {
342 net, name, err := dc.unmarshalEntityNetwork(name)
343 if err != nil {
344 return nil, "", err
345 }
346
347 if net.conn == nil {
348 return nil, "", ircError{&irc.Message{
349 Command: irc.ERR_NOSUCHCHANNEL,
350 Params: []string{name, "Disconnected from upstream network"},
351 }}
352 }
353
354 return net.conn, name, nil
355}
356
357func (dc *downstreamConn) unmarshalText(uc *upstreamConn, text string) string {
358 if dc.upstream() != nil {
359 return text
360 }
361 // TODO: smarter parsing that ignores URLs
362 return strings.ReplaceAll(text, "/"+uc.network.GetName(), "")
363}
364
365func (dc *downstreamConn) readMessages(ch chan<- event) error {
366 for {
367 msg, err := dc.ReadMessage()
368 if err == io.EOF {
369 break
370 } else if err != nil {
371 return fmt.Errorf("failed to read IRC command: %v", err)
372 }
373
374 ch <- eventDownstreamMessage{msg, dc}
375 }
376
377 return nil
378}
379
380// SendMessage sends an outgoing message.
381//
382// This can only called from the user goroutine.
383func (dc *downstreamConn) SendMessage(msg *irc.Message) {
384 if !dc.caps["message-tags"] {
385 if msg.Command == "TAGMSG" {
386 return
387 }
388 msg = msg.Copy()
389 for name := range msg.Tags {
390 supported := false
391 switch name {
392 case "time":
393 supported = dc.caps["server-time"]
394 case "account":
395 supported = dc.caps["account"]
396 }
397 if !supported {
398 delete(msg.Tags, name)
399 }
400 }
401 }
402 if !dc.caps["batch"] && msg.Tags["batch"] != "" {
403 msg = msg.Copy()
404 delete(msg.Tags, "batch")
405 }
406 if msg.Command == "JOIN" && !dc.caps["extended-join"] {
407 msg.Params = msg.Params[:1]
408 }
409 if msg.Command == "SETNAME" && !dc.caps["setname"] {
410 return
411 }
412
413 dc.conn.SendMessage(msg)
414}
415
416func (dc *downstreamConn) SendBatch(typ string, params []string, tags irc.Tags, f func(batchRef irc.TagValue)) {
417 dc.lastBatchRef++
418 ref := fmt.Sprintf("%v", dc.lastBatchRef)
419
420 if dc.caps["batch"] {
421 dc.SendMessage(&irc.Message{
422 Tags: tags,
423 Prefix: dc.srv.prefix(),
424 Command: "BATCH",
425 Params: append([]string{"+" + ref, typ}, params...),
426 })
427 }
428
429 f(irc.TagValue(ref))
430
431 if dc.caps["batch"] {
432 dc.SendMessage(&irc.Message{
433 Prefix: dc.srv.prefix(),
434 Command: "BATCH",
435 Params: []string{"-" + ref},
436 })
437 }
438}
439
440// sendMessageWithID sends an outgoing message with the specified internal ID.
441func (dc *downstreamConn) sendMessageWithID(msg *irc.Message, id string) {
442 dc.SendMessage(msg)
443
444 if id == "" || !dc.messageSupportsHistory(msg) {
445 return
446 }
447
448 dc.sendPing(id)
449}
450
451// advanceMessageWithID advances history to the specified message ID without
452// sending a message. This is useful e.g. for self-messages when echo-message
453// isn't enabled.
454func (dc *downstreamConn) advanceMessageWithID(msg *irc.Message, id string) {
455 if id == "" || !dc.messageSupportsHistory(msg) {
456 return
457 }
458
459 dc.sendPing(id)
460}
461
462// ackMsgID acknowledges that a message has been received.
463func (dc *downstreamConn) ackMsgID(id string) {
464 netID, entity, err := parseMsgID(id, nil)
465 if err != nil {
466 dc.logger.Printf("failed to ACK message ID %q: %v", id, err)
467 return
468 }
469
470 network := dc.user.getNetworkByID(netID)
471 if network == nil {
472 return
473 }
474
475 network.delivered.StoreID(entity, dc.clientName, id)
476}
477
478func (dc *downstreamConn) sendPing(msgID string) {
479 token := "soju-msgid-" + msgID
480 dc.SendMessage(&irc.Message{
481 Command: "PING",
482 Params: []string{token},
483 })
484}
485
486func (dc *downstreamConn) handlePong(token string) {
487 if !strings.HasPrefix(token, "soju-msgid-") {
488 dc.logger.Printf("received unrecognized PONG token %q", token)
489 return
490 }
491 msgID := strings.TrimPrefix(token, "soju-msgid-")
492 dc.ackMsgID(msgID)
493}
494
495// marshalMessage re-formats a message coming from an upstream connection so
496// that it's suitable for being sent on this downstream connection. Only
497// messages that may appear in logs are supported, except MODE.
498func (dc *downstreamConn) marshalMessage(msg *irc.Message, net *network) *irc.Message {
499 msg = msg.Copy()
500 msg.Prefix = dc.marshalUserPrefix(net, msg.Prefix)
501
502 switch msg.Command {
503 case "PRIVMSG", "NOTICE", "TAGMSG":
504 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
505 case "NICK":
506 // Nick change for another user
507 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
508 case "JOIN", "PART":
509 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
510 case "KICK":
511 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
512 msg.Params[1] = dc.marshalEntity(net, msg.Params[1])
513 case "TOPIC":
514 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
515 case "QUIT", "SETNAME":
516 // This space is intentionally left blank
517 default:
518 panic(fmt.Sprintf("unexpected %q message", msg.Command))
519 }
520
521 return msg
522}
523
524func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
525 switch msg.Command {
526 case "QUIT":
527 return dc.Close()
528 default:
529 if dc.registered {
530 return dc.handleMessageRegistered(msg)
531 } else {
532 return dc.handleMessageUnregistered(msg)
533 }
534 }
535}
536
537func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
538 switch msg.Command {
539 case "NICK":
540 var nick string
541 if err := parseMessageParams(msg, &nick); err != nil {
542 return err
543 }
544 if strings.ContainsAny(nick, illegalNickChars) {
545 return ircError{&irc.Message{
546 Command: irc.ERR_ERRONEUSNICKNAME,
547 Params: []string{dc.nick, nick, "contains illegal characters"},
548 }}
549 }
550 nickCM := casemapASCII(nick)
551 if nickCM == serviceNickCM {
552 return ircError{&irc.Message{
553 Command: irc.ERR_NICKNAMEINUSE,
554 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
555 }}
556 }
557 dc.nick = nick
558 dc.nickCM = nickCM
559 case "USER":
560 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
561 return err
562 }
563 case "PASS":
564 if err := parseMessageParams(msg, &dc.password); err != nil {
565 return err
566 }
567 case "CAP":
568 var subCmd string
569 if err := parseMessageParams(msg, &subCmd); err != nil {
570 return err
571 }
572 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
573 return err
574 }
575 case "AUTHENTICATE":
576 if !dc.caps["sasl"] {
577 return ircError{&irc.Message{
578 Command: irc.ERR_SASLFAIL,
579 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
580 }}
581 }
582 if len(msg.Params) == 0 {
583 return ircError{&irc.Message{
584 Command: irc.ERR_SASLFAIL,
585 Params: []string{"*", "Missing AUTHENTICATE argument"},
586 }}
587 }
588 if dc.nick == "" {
589 return ircError{&irc.Message{
590 Command: irc.ERR_SASLFAIL,
591 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
592 }}
593 }
594
595 var resp []byte
596 if dc.saslServer == nil {
597 mech := strings.ToUpper(msg.Params[0])
598 switch mech {
599 case "PLAIN":
600 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
601 return dc.authenticate(username, password)
602 }))
603 default:
604 return ircError{&irc.Message{
605 Command: irc.ERR_SASLFAIL,
606 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
607 }}
608 }
609 } else if msg.Params[0] == "*" {
610 dc.saslServer = nil
611 return ircError{&irc.Message{
612 Command: irc.ERR_SASLABORTED,
613 Params: []string{"*", "SASL authentication aborted"},
614 }}
615 } else if msg.Params[0] == "+" {
616 resp = nil
617 } else {
618 // TODO: multi-line messages
619 var err error
620 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
621 if err != nil {
622 dc.saslServer = nil
623 return ircError{&irc.Message{
624 Command: irc.ERR_SASLFAIL,
625 Params: []string{"*", "Invalid base64-encoded response"},
626 }}
627 }
628 }
629
630 challenge, done, err := dc.saslServer.Next(resp)
631 if err != nil {
632 dc.saslServer = nil
633 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
634 return ircError{&irc.Message{
635 Command: irc.ERR_SASLFAIL,
636 Params: []string{"*", ircErr.Message.Params[1]},
637 }}
638 }
639 dc.SendMessage(&irc.Message{
640 Prefix: dc.srv.prefix(),
641 Command: irc.ERR_SASLFAIL,
642 Params: []string{"*", "SASL error"},
643 })
644 return fmt.Errorf("SASL authentication failed: %v", err)
645 } else if done {
646 dc.saslServer = nil
647 dc.SendMessage(&irc.Message{
648 Prefix: dc.srv.prefix(),
649 Command: irc.RPL_LOGGEDIN,
650 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
651 })
652 dc.SendMessage(&irc.Message{
653 Prefix: dc.srv.prefix(),
654 Command: irc.RPL_SASLSUCCESS,
655 Params: []string{dc.nick, "SASL authentication successful"},
656 })
657 } else {
658 challengeStr := "+"
659 if len(challenge) > 0 {
660 challengeStr = base64.StdEncoding.EncodeToString(challenge)
661 }
662
663 // TODO: multi-line messages
664 dc.SendMessage(&irc.Message{
665 Prefix: dc.srv.prefix(),
666 Command: "AUTHENTICATE",
667 Params: []string{challengeStr},
668 })
669 }
670 case "BOUNCER":
671 var subcommand string
672 if err := parseMessageParams(msg, &subcommand); err != nil {
673 return err
674 }
675
676 switch strings.ToUpper(subcommand) {
677 case "BIND":
678 var idStr string
679 if err := parseMessageParams(msg, nil, &idStr); err != nil {
680 return err
681 }
682
683 if dc.registered {
684 return ircError{&irc.Message{
685 Command: "FAIL",
686 Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind bouncer network after registration"},
687 }}
688 }
689 if dc.user == nil {
690 return ircError{&irc.Message{
691 Command: "FAIL",
692 Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
693 }}
694 }
695
696 id, err := parseBouncerNetID(subcommand, idStr)
697 if err != nil {
698 return err
699 }
700
701 var match *network
702 dc.user.forEachNetwork(func(net *network) {
703 if net.ID == id {
704 match = net
705 }
706 })
707 if match == nil {
708 return ircError{&irc.Message{
709 Command: "FAIL",
710 Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
711 }}
712 }
713
714 dc.networkName = match.GetName()
715 }
716 default:
717 dc.logger.Printf("unhandled message: %v", msg)
718 return newUnknownCommandError(msg.Command)
719 }
720 if dc.rawUsername != "" && dc.nick != "" && !dc.negotiatingCaps {
721 return dc.register()
722 }
723 return nil
724}
725
726func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
727 cmd = strings.ToUpper(cmd)
728
729 replyTo := dc.nick
730 if !dc.registered {
731 replyTo = "*"
732 }
733
734 switch cmd {
735 case "LS":
736 if len(args) > 0 {
737 var err error
738 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
739 return err
740 }
741 }
742 if !dc.registered && dc.capVersion >= 302 {
743 // Let downstream show everything it supports, and trim
744 // down the available capabilities when upstreams are
745 // known.
746 for k, v := range needAllDownstreamCaps {
747 dc.supportedCaps[k] = v
748 }
749 }
750
751 caps := make([]string, 0, len(dc.supportedCaps))
752 for k, v := range dc.supportedCaps {
753 if dc.capVersion >= 302 && v != "" {
754 caps = append(caps, k+"="+v)
755 } else {
756 caps = append(caps, k)
757 }
758 }
759
760 // TODO: multi-line replies
761 dc.SendMessage(&irc.Message{
762 Prefix: dc.srv.prefix(),
763 Command: "CAP",
764 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
765 })
766
767 if dc.capVersion >= 302 {
768 // CAP version 302 implicitly enables cap-notify
769 dc.caps["cap-notify"] = true
770 }
771
772 if !dc.registered {
773 dc.negotiatingCaps = true
774 }
775 case "LIST":
776 var caps []string
777 for name, enabled := range dc.caps {
778 if enabled {
779 caps = append(caps, name)
780 }
781 }
782
783 // TODO: multi-line replies
784 dc.SendMessage(&irc.Message{
785 Prefix: dc.srv.prefix(),
786 Command: "CAP",
787 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
788 })
789 case "REQ":
790 if len(args) == 0 {
791 return ircError{&irc.Message{
792 Command: err_invalidcapcmd,
793 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
794 }}
795 }
796
797 // TODO: atomically ack/nak the whole capability set
798 caps := strings.Fields(args[0])
799 ack := true
800 for _, name := range caps {
801 name = strings.ToLower(name)
802 enable := !strings.HasPrefix(name, "-")
803 if !enable {
804 name = strings.TrimPrefix(name, "-")
805 }
806
807 if enable == dc.caps[name] {
808 continue
809 }
810
811 _, ok := dc.supportedCaps[name]
812 if !ok {
813 ack = false
814 break
815 }
816
817 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
818 // cap-notify cannot be disabled with CAP version 302
819 ack = false
820 break
821 }
822
823 dc.caps[name] = enable
824 }
825
826 reply := "NAK"
827 if ack {
828 reply = "ACK"
829 }
830 dc.SendMessage(&irc.Message{
831 Prefix: dc.srv.prefix(),
832 Command: "CAP",
833 Params: []string{replyTo, reply, args[0]},
834 })
835
836 if !dc.registered {
837 dc.negotiatingCaps = true
838 }
839 case "END":
840 dc.negotiatingCaps = false
841 default:
842 return ircError{&irc.Message{
843 Command: err_invalidcapcmd,
844 Params: []string{replyTo, cmd, "Unknown CAP command"},
845 }}
846 }
847 return nil
848}
849
850func (dc *downstreamConn) setSupportedCap(name, value string) {
851 prevValue, hasPrev := dc.supportedCaps[name]
852 changed := !hasPrev || prevValue != value
853 dc.supportedCaps[name] = value
854
855 if !dc.caps["cap-notify"] || !changed {
856 return
857 }
858
859 replyTo := dc.nick
860 if !dc.registered {
861 replyTo = "*"
862 }
863
864 cap := name
865 if value != "" && dc.capVersion >= 302 {
866 cap = name + "=" + value
867 }
868
869 dc.SendMessage(&irc.Message{
870 Prefix: dc.srv.prefix(),
871 Command: "CAP",
872 Params: []string{replyTo, "NEW", cap},
873 })
874}
875
876func (dc *downstreamConn) unsetSupportedCap(name string) {
877 _, hasPrev := dc.supportedCaps[name]
878 delete(dc.supportedCaps, name)
879 delete(dc.caps, name)
880
881 if !dc.caps["cap-notify"] || !hasPrev {
882 return
883 }
884
885 replyTo := dc.nick
886 if !dc.registered {
887 replyTo = "*"
888 }
889
890 dc.SendMessage(&irc.Message{
891 Prefix: dc.srv.prefix(),
892 Command: "CAP",
893 Params: []string{replyTo, "DEL", name},
894 })
895}
896
897func (dc *downstreamConn) updateSupportedCaps() {
898 supportedCaps := make(map[string]bool)
899 for cap := range needAllDownstreamCaps {
900 supportedCaps[cap] = true
901 }
902 dc.forEachUpstream(func(uc *upstreamConn) {
903 for cap, supported := range supportedCaps {
904 supportedCaps[cap] = supported && uc.caps[cap]
905 }
906 })
907
908 for cap, supported := range supportedCaps {
909 if supported {
910 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
911 } else {
912 dc.unsetSupportedCap(cap)
913 }
914 }
915}
916
917func (dc *downstreamConn) updateNick() {
918 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
919 dc.SendMessage(&irc.Message{
920 Prefix: dc.prefix(),
921 Command: "NICK",
922 Params: []string{uc.nick},
923 })
924 dc.nick = uc.nick
925 dc.nickCM = casemapASCII(dc.nick)
926 }
927}
928
929func (dc *downstreamConn) updateRealname() {
930 if uc := dc.upstream(); uc != nil && uc.realname != dc.realname && dc.caps["setname"] {
931 dc.SendMessage(&irc.Message{
932 Prefix: dc.prefix(),
933 Command: "SETNAME",
934 Params: []string{uc.realname},
935 })
936 dc.realname = uc.realname
937 }
938}
939
940func sanityCheckServer(addr string) error {
941 dialer := net.Dialer{Timeout: 30 * time.Second}
942 conn, err := tls.DialWithDialer(&dialer, "tcp", addr, nil)
943 if err != nil {
944 return err
945 }
946 return conn.Close()
947}
948
949func unmarshalUsername(rawUsername string) (username, client, network string) {
950 username = rawUsername
951
952 i := strings.IndexAny(username, "/@")
953 j := strings.LastIndexAny(username, "/@")
954 if i >= 0 {
955 username = rawUsername[:i]
956 }
957 if j >= 0 {
958 if rawUsername[j] == '@' {
959 client = rawUsername[j+1:]
960 } else {
961 network = rawUsername[j+1:]
962 }
963 }
964 if i >= 0 && j >= 0 && i < j {
965 if rawUsername[i] == '@' {
966 client = rawUsername[i+1 : j]
967 } else {
968 network = rawUsername[i+1 : j]
969 }
970 }
971
972 return username, client, network
973}
974
975func (dc *downstreamConn) authenticate(username, password string) error {
976 username, clientName, networkName := unmarshalUsername(username)
977
978 u, err := dc.srv.db.GetUser(username)
979 if err != nil {
980 dc.logger.Printf("failed authentication for %q: user not found: %v", username, err)
981 return errAuthFailed
982 }
983
984 // Password auth disabled
985 if u.Password == "" {
986 return errAuthFailed
987 }
988
989 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
990 if err != nil {
991 dc.logger.Printf("failed authentication for %q: wrong password: %v", username, err)
992 return errAuthFailed
993 }
994
995 dc.user = dc.srv.getUser(username)
996 if dc.user == nil {
997 dc.logger.Printf("failed authentication for %q: user not active", username)
998 return errAuthFailed
999 }
1000 dc.clientName = clientName
1001 dc.networkName = networkName
1002 return nil
1003}
1004
1005func (dc *downstreamConn) register() error {
1006 if dc.registered {
1007 return fmt.Errorf("tried to register twice")
1008 }
1009
1010 password := dc.password
1011 dc.password = ""
1012 if dc.user == nil {
1013 if err := dc.authenticate(dc.rawUsername, password); err != nil {
1014 return err
1015 }
1016 }
1017
1018 if dc.clientName == "" && dc.networkName == "" {
1019 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
1020 }
1021
1022 dc.registered = true
1023 dc.logger.Printf("registration complete for user %q", dc.user.Username)
1024 return nil
1025}
1026
1027func (dc *downstreamConn) loadNetwork() error {
1028 if dc.networkName == "" {
1029 return nil
1030 }
1031
1032 network := dc.user.getNetwork(dc.networkName)
1033 if network == nil {
1034 addr := dc.networkName
1035 if !strings.ContainsRune(addr, ':') {
1036 addr = addr + ":6697"
1037 }
1038
1039 dc.logger.Printf("trying to connect to new network %q", addr)
1040 if err := sanityCheckServer(addr); err != nil {
1041 dc.logger.Printf("failed to connect to %q: %v", addr, err)
1042 return ircError{&irc.Message{
1043 Command: irc.ERR_PASSWDMISMATCH,
1044 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
1045 }}
1046 }
1047
1048 // Some clients only allow specifying the nickname (and use the
1049 // nickname as a username too). Strip the network name from the
1050 // nickname when auto-saving networks.
1051 nick, _, _ := unmarshalUsername(dc.nick)
1052
1053 dc.logger.Printf("auto-saving network %q", dc.networkName)
1054 var err error
1055 network, err = dc.user.createNetwork(&Network{
1056 Addr: dc.networkName,
1057 Nick: nick,
1058 Enabled: true,
1059 })
1060 if err != nil {
1061 return err
1062 }
1063 }
1064
1065 dc.network = network
1066 return nil
1067}
1068
1069func (dc *downstreamConn) welcome() error {
1070 if dc.user == nil || !dc.registered {
1071 panic("tried to welcome an unregistered connection")
1072 }
1073
1074 // TODO: doing this might take some time. We should do it in dc.register
1075 // instead, but we'll potentially be adding a new network and this must be
1076 // done in the user goroutine.
1077 if err := dc.loadNetwork(); err != nil {
1078 return err
1079 }
1080
1081 isupport := []string{
1082 fmt.Sprintf("CHATHISTORY=%v", dc.srv.HistoryLimit),
1083 "CASEMAPPING=ascii",
1084 }
1085
1086 if dc.network != nil {
1087 isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
1088 }
1089
1090 if uc := dc.upstream(); uc != nil {
1091 for k := range passthroughIsupport {
1092 v, ok := uc.isupport[k]
1093 if !ok {
1094 continue
1095 }
1096 if v != nil {
1097 isupport = append(isupport, fmt.Sprintf("%v=%v", k, *v))
1098 } else {
1099 isupport = append(isupport, k)
1100 }
1101 }
1102 }
1103
1104 dc.SendMessage(&irc.Message{
1105 Prefix: dc.srv.prefix(),
1106 Command: irc.RPL_WELCOME,
1107 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
1108 })
1109 dc.SendMessage(&irc.Message{
1110 Prefix: dc.srv.prefix(),
1111 Command: irc.RPL_YOURHOST,
1112 Params: []string{dc.nick, "Your host is " + dc.srv.Hostname},
1113 })
1114 dc.SendMessage(&irc.Message{
1115 Prefix: dc.srv.prefix(),
1116 Command: irc.RPL_MYINFO,
1117 Params: []string{dc.nick, dc.srv.Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
1118 })
1119 for _, msg := range generateIsupport(dc.srv.prefix(), dc.nick, isupport) {
1120 dc.SendMessage(msg)
1121 }
1122 motdHint := "No MOTD"
1123 if uc := dc.upstream(); uc != nil {
1124 motdHint = "Use /motd to read the message of the day"
1125 dc.SendMessage(&irc.Message{
1126 Prefix: dc.srv.prefix(),
1127 Command: irc.RPL_UMODEIS,
1128 Params: []string{dc.nick, string(uc.modes)},
1129 })
1130 }
1131 dc.SendMessage(&irc.Message{
1132 Prefix: dc.srv.prefix(),
1133 Command: irc.ERR_NOMOTD,
1134 Params: []string{dc.nick, motdHint},
1135 })
1136
1137 dc.updateNick()
1138 dc.updateRealname()
1139 dc.updateSupportedCaps()
1140
1141 if dc.caps["soju.im/bouncer-networks-notify"] {
1142 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
1143 dc.user.forEachNetwork(func(network *network) {
1144 idStr := fmt.Sprintf("%v", network.ID)
1145 attrs := getNetworkAttrs(network)
1146 dc.SendMessage(&irc.Message{
1147 Tags: irc.Tags{"batch": batchRef},
1148 Prefix: dc.srv.prefix(),
1149 Command: "BOUNCER",
1150 Params: []string{"NETWORK", idStr, attrs.String()},
1151 })
1152 })
1153 })
1154 }
1155
1156 dc.forEachUpstream(func(uc *upstreamConn) {
1157 for _, entry := range uc.channels.innerMap {
1158 ch := entry.value.(*upstreamChannel)
1159 if !ch.complete {
1160 continue
1161 }
1162 record := uc.network.channels.Value(ch.Name)
1163 if record != nil && record.Detached {
1164 continue
1165 }
1166
1167 dc.SendMessage(&irc.Message{
1168 Prefix: dc.prefix(),
1169 Command: "JOIN",
1170 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
1171 })
1172
1173 forwardChannel(dc, ch)
1174 }
1175 })
1176
1177 dc.forEachNetwork(func(net *network) {
1178 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1179 return
1180 }
1181
1182 // Only send history if we're the first connected client with that name
1183 // for the network
1184 firstClient := true
1185 dc.user.forEachDownstream(func(c *downstreamConn) {
1186 if c != dc && c.clientName == dc.clientName && c.network == dc.network {
1187 firstClient = false
1188 }
1189 })
1190 if firstClient {
1191 net.delivered.ForEachTarget(func(target string) {
1192 lastDelivered := net.delivered.LoadID(target, dc.clientName)
1193 if lastDelivered == "" {
1194 return
1195 }
1196
1197 dc.sendTargetBacklog(net, target, lastDelivered)
1198
1199 // Fast-forward history to last message
1200 targetCM := net.casemap(target)
1201 lastID, err := dc.user.msgStore.LastMsgID(net, targetCM, time.Now())
1202 if err != nil {
1203 dc.logger.Printf("failed to get last message ID: %v", err)
1204 return
1205 }
1206 net.delivered.StoreID(target, dc.clientName, lastID)
1207 })
1208 }
1209 })
1210
1211 return nil
1212}
1213
1214// messageSupportsHistory checks whether the provided message can be sent as
1215// part of an history batch.
1216func (dc *downstreamConn) messageSupportsHistory(msg *irc.Message) bool {
1217 // Don't replay all messages, because that would mess up client
1218 // state. For instance we just sent the list of users, sending
1219 // PART messages for one of these users would be incorrect.
1220 // TODO: add support for draft/event-playback
1221 switch msg.Command {
1222 case "PRIVMSG", "NOTICE":
1223 return true
1224 }
1225 return false
1226}
1227
1228func (dc *downstreamConn) sendTargetBacklog(net *network, target, msgID string) {
1229 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1230 return
1231 }
1232
1233 ch := net.channels.Value(target)
1234
1235 limit := 4000
1236 targetCM := net.casemap(target)
1237 history, err := dc.user.msgStore.LoadLatestID(net, targetCM, msgID, limit)
1238 if err != nil {
1239 dc.logger.Printf("failed to send backlog for %q: %v", target, err)
1240 return
1241 }
1242
1243 dc.SendBatch("chathistory", []string{dc.marshalEntity(net, target)}, nil, func(batchRef irc.TagValue) {
1244 for _, msg := range history {
1245 if !dc.messageSupportsHistory(msg) {
1246 continue
1247 }
1248
1249 if ch != nil && ch.Detached {
1250 if net.detachedMessageNeedsRelay(ch, msg) {
1251 dc.relayDetachedMessage(net, msg)
1252 }
1253 } else {
1254 if dc.caps["batch"] {
1255 msg.Tags["batch"] = irc.TagValue(batchRef)
1256 }
1257 dc.SendMessage(dc.marshalMessage(msg, net))
1258 }
1259 }
1260 })
1261}
1262
1263func (dc *downstreamConn) relayDetachedMessage(net *network, msg *irc.Message) {
1264 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
1265 return
1266 }
1267
1268 sender := msg.Prefix.Name
1269 target, text := msg.Params[0], msg.Params[1]
1270 if net.isHighlight(msg) {
1271 sendServiceNOTICE(dc, fmt.Sprintf("highlight in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1272 } else {
1273 sendServiceNOTICE(dc, fmt.Sprintf("message in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1274 }
1275}
1276
1277func (dc *downstreamConn) runUntilRegistered() error {
1278 for !dc.registered {
1279 msg, err := dc.ReadMessage()
1280 if err != nil {
1281 return fmt.Errorf("failed to read IRC command: %v", err)
1282 }
1283
1284 err = dc.handleMessage(msg)
1285 if ircErr, ok := err.(ircError); ok {
1286 ircErr.Message.Prefix = dc.srv.prefix()
1287 dc.SendMessage(ircErr.Message)
1288 } else if err != nil {
1289 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
1290 }
1291 }
1292
1293 return nil
1294}
1295
1296func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
1297 switch msg.Command {
1298 case "CAP":
1299 var subCmd string
1300 if err := parseMessageParams(msg, &subCmd); err != nil {
1301 return err
1302 }
1303 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
1304 return err
1305 }
1306 case "PING":
1307 var source, destination string
1308 if err := parseMessageParams(msg, &source); err != nil {
1309 return err
1310 }
1311 if len(msg.Params) > 1 {
1312 destination = msg.Params[1]
1313 }
1314 if destination != "" && destination != dc.srv.Hostname {
1315 return ircError{&irc.Message{
1316 Command: irc.ERR_NOSUCHSERVER,
1317 Params: []string{dc.nick, destination, "No such server"},
1318 }}
1319 }
1320 dc.SendMessage(&irc.Message{
1321 Prefix: dc.srv.prefix(),
1322 Command: "PONG",
1323 Params: []string{dc.srv.Hostname, source},
1324 })
1325 return nil
1326 case "PONG":
1327 if len(msg.Params) == 0 {
1328 return newNeedMoreParamsError(msg.Command)
1329 }
1330 token := msg.Params[len(msg.Params)-1]
1331 dc.handlePong(token)
1332 case "USER":
1333 return ircError{&irc.Message{
1334 Command: irc.ERR_ALREADYREGISTERED,
1335 Params: []string{dc.nick, "You may not reregister"},
1336 }}
1337 case "NICK":
1338 var rawNick string
1339 if err := parseMessageParams(msg, &rawNick); err != nil {
1340 return err
1341 }
1342
1343 nick := rawNick
1344 var upstream *upstreamConn
1345 if dc.upstream() == nil {
1346 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
1347 if err == nil { // NICK nick/network: NICK only on a specific upstream
1348 upstream = uc
1349 nick = unmarshaledNick
1350 }
1351 }
1352
1353 if strings.ContainsAny(nick, illegalNickChars) {
1354 return ircError{&irc.Message{
1355 Command: irc.ERR_ERRONEUSNICKNAME,
1356 Params: []string{dc.nick, rawNick, "contains illegal characters"},
1357 }}
1358 }
1359 if casemapASCII(nick) == serviceNickCM {
1360 return ircError{&irc.Message{
1361 Command: irc.ERR_NICKNAMEINUSE,
1362 Params: []string{dc.nick, rawNick, "Nickname reserved for bouncer service"},
1363 }}
1364 }
1365
1366 var err error
1367 dc.forEachNetwork(func(n *network) {
1368 if err != nil || (upstream != nil && upstream.network != n) {
1369 return
1370 }
1371 n.Nick = nick
1372 err = dc.srv.db.StoreNetwork(dc.user.ID, &n.Network)
1373 })
1374 if err != nil {
1375 return err
1376 }
1377
1378 dc.forEachUpstream(func(uc *upstreamConn) {
1379 if upstream != nil && upstream != uc {
1380 return
1381 }
1382 uc.SendMessageLabeled(dc.id, &irc.Message{
1383 Command: "NICK",
1384 Params: []string{nick},
1385 })
1386 })
1387
1388 if dc.upstream() == nil && upstream == nil && dc.nick != nick {
1389 dc.SendMessage(&irc.Message{
1390 Prefix: dc.prefix(),
1391 Command: "NICK",
1392 Params: []string{nick},
1393 })
1394 dc.nick = nick
1395 dc.nickCM = casemapASCII(dc.nick)
1396 }
1397 case "SETNAME":
1398 var realname string
1399 if err := parseMessageParams(msg, &realname); err != nil {
1400 return err
1401 }
1402
1403 // If the client just resets to the default, just wipe the per-network
1404 // preference
1405 storeRealname := realname
1406 if realname == dc.user.Realname {
1407 storeRealname = ""
1408 }
1409
1410 var storeErr error
1411 var needUpdate []Network
1412 dc.forEachNetwork(func(n *network) {
1413 // We only need to call updateNetwork for upstreams that don't
1414 // support setname
1415 if uc := n.conn; uc != nil && uc.caps["setname"] {
1416 uc.SendMessageLabeled(dc.id, &irc.Message{
1417 Command: "SETNAME",
1418 Params: []string{realname},
1419 })
1420
1421 n.Realname = storeRealname
1422 if err := dc.srv.db.StoreNetwork(dc.user.ID, &n.Network); err != nil {
1423 dc.logger.Printf("failed to store network realname: %v", err)
1424 storeErr = err
1425 }
1426 return
1427 }
1428
1429 record := n.Network // copy network record because we'll mutate it
1430 record.Realname = storeRealname
1431 needUpdate = append(needUpdate, record)
1432 })
1433
1434 // Walk the network list as a second step, because updateNetwork
1435 // mutates the original list
1436 for _, record := range needUpdate {
1437 if _, err := dc.user.updateNetwork(&record); err != nil {
1438 dc.logger.Printf("failed to update network realname: %v", err)
1439 storeErr = err
1440 }
1441 }
1442 if storeErr != nil {
1443 return ircError{&irc.Message{
1444 Command: "FAIL",
1445 Params: []string{"SETNAME", "CANNOT_CHANGE_REALNAME", "Failed to update realname"},
1446 }}
1447 }
1448
1449 if dc.upstream() == nil && dc.caps["setname"] {
1450 dc.SendMessage(&irc.Message{
1451 Prefix: dc.prefix(),
1452 Command: "SETNAME",
1453 Params: []string{realname},
1454 })
1455 }
1456 case "JOIN":
1457 var namesStr string
1458 if err := parseMessageParams(msg, &namesStr); err != nil {
1459 return err
1460 }
1461
1462 var keys []string
1463 if len(msg.Params) > 1 {
1464 keys = strings.Split(msg.Params[1], ",")
1465 }
1466
1467 for i, name := range strings.Split(namesStr, ",") {
1468 uc, upstreamName, err := dc.unmarshalEntity(name)
1469 if err != nil {
1470 return err
1471 }
1472
1473 var key string
1474 if len(keys) > i {
1475 key = keys[i]
1476 }
1477
1478 if !uc.isChannel(upstreamName) {
1479 dc.SendMessage(&irc.Message{
1480 Prefix: dc.srv.prefix(),
1481 Command: irc.ERR_NOSUCHCHANNEL,
1482 Params: []string{name, "Not a channel name"},
1483 })
1484 continue
1485 }
1486
1487 params := []string{upstreamName}
1488 if key != "" {
1489 params = append(params, key)
1490 }
1491 uc.SendMessageLabeled(dc.id, &irc.Message{
1492 Command: "JOIN",
1493 Params: params,
1494 })
1495
1496 ch := uc.network.channels.Value(upstreamName)
1497 if ch != nil {
1498 // Don't clear the channel key if there's one set
1499 // TODO: add a way to unset the channel key
1500 if key != "" {
1501 ch.Key = key
1502 }
1503 uc.network.attach(ch)
1504 } else {
1505 ch = &Channel{
1506 Name: upstreamName,
1507 Key: key,
1508 }
1509 uc.network.channels.SetValue(upstreamName, ch)
1510 }
1511 if err := dc.srv.db.StoreChannel(uc.network.ID, ch); err != nil {
1512 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1513 }
1514 }
1515 case "PART":
1516 var namesStr string
1517 if err := parseMessageParams(msg, &namesStr); err != nil {
1518 return err
1519 }
1520
1521 var reason string
1522 if len(msg.Params) > 1 {
1523 reason = msg.Params[1]
1524 }
1525
1526 for _, name := range strings.Split(namesStr, ",") {
1527 uc, upstreamName, err := dc.unmarshalEntity(name)
1528 if err != nil {
1529 return err
1530 }
1531
1532 if strings.EqualFold(reason, "detach") {
1533 ch := uc.network.channels.Value(upstreamName)
1534 if ch != nil {
1535 uc.network.detach(ch)
1536 } else {
1537 ch = &Channel{
1538 Name: name,
1539 Detached: true,
1540 }
1541 uc.network.channels.SetValue(upstreamName, ch)
1542 }
1543 if err := dc.srv.db.StoreChannel(uc.network.ID, ch); err != nil {
1544 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1545 }
1546 } else {
1547 params := []string{upstreamName}
1548 if reason != "" {
1549 params = append(params, reason)
1550 }
1551 uc.SendMessageLabeled(dc.id, &irc.Message{
1552 Command: "PART",
1553 Params: params,
1554 })
1555
1556 if err := uc.network.deleteChannel(upstreamName); err != nil {
1557 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1558 }
1559 }
1560 }
1561 case "KICK":
1562 var channelStr, userStr string
1563 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1564 return err
1565 }
1566
1567 channels := strings.Split(channelStr, ",")
1568 users := strings.Split(userStr, ",")
1569
1570 var reason string
1571 if len(msg.Params) > 2 {
1572 reason = msg.Params[2]
1573 }
1574
1575 if len(channels) != 1 && len(channels) != len(users) {
1576 return ircError{&irc.Message{
1577 Command: irc.ERR_BADCHANMASK,
1578 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1579 }}
1580 }
1581
1582 for i, user := range users {
1583 var channel string
1584 if len(channels) == 1 {
1585 channel = channels[0]
1586 } else {
1587 channel = channels[i]
1588 }
1589
1590 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1591 if err != nil {
1592 return err
1593 }
1594
1595 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1596 if err != nil {
1597 return err
1598 }
1599
1600 if ucChannel != ucUser {
1601 return ircError{&irc.Message{
1602 Command: irc.ERR_USERNOTINCHANNEL,
1603 Params: []string{dc.nick, user, channel, "They are on another network"},
1604 }}
1605 }
1606 uc := ucChannel
1607
1608 params := []string{upstreamChannel, upstreamUser}
1609 if reason != "" {
1610 params = append(params, reason)
1611 }
1612 uc.SendMessageLabeled(dc.id, &irc.Message{
1613 Command: "KICK",
1614 Params: params,
1615 })
1616 }
1617 case "MODE":
1618 var name string
1619 if err := parseMessageParams(msg, &name); err != nil {
1620 return err
1621 }
1622
1623 var modeStr string
1624 if len(msg.Params) > 1 {
1625 modeStr = msg.Params[1]
1626 }
1627
1628 if casemapASCII(name) == dc.nickCM {
1629 if modeStr != "" {
1630 if uc := dc.upstream(); uc != nil {
1631 uc.SendMessageLabeled(dc.id, &irc.Message{
1632 Command: "MODE",
1633 Params: []string{uc.nick, modeStr},
1634 })
1635 } else {
1636 dc.SendMessage(&irc.Message{
1637 Prefix: dc.srv.prefix(),
1638 Command: irc.ERR_UMODEUNKNOWNFLAG,
1639 Params: []string{dc.nick, "Cannot change user mode in multi-upstream mode"},
1640 })
1641 }
1642 } else {
1643 var userMode string
1644 if uc := dc.upstream(); uc != nil {
1645 userMode = string(uc.modes)
1646 }
1647
1648 dc.SendMessage(&irc.Message{
1649 Prefix: dc.srv.prefix(),
1650 Command: irc.RPL_UMODEIS,
1651 Params: []string{dc.nick, userMode},
1652 })
1653 }
1654 return nil
1655 }
1656
1657 uc, upstreamName, err := dc.unmarshalEntity(name)
1658 if err != nil {
1659 return err
1660 }
1661
1662 if !uc.isChannel(upstreamName) {
1663 return ircError{&irc.Message{
1664 Command: irc.ERR_USERSDONTMATCH,
1665 Params: []string{dc.nick, "Cannot change mode for other users"},
1666 }}
1667 }
1668
1669 if modeStr != "" {
1670 params := []string{upstreamName, modeStr}
1671 params = append(params, msg.Params[2:]...)
1672 uc.SendMessageLabeled(dc.id, &irc.Message{
1673 Command: "MODE",
1674 Params: params,
1675 })
1676 } else {
1677 ch := uc.channels.Value(upstreamName)
1678 if ch == nil {
1679 return ircError{&irc.Message{
1680 Command: irc.ERR_NOSUCHCHANNEL,
1681 Params: []string{dc.nick, name, "No such channel"},
1682 }}
1683 }
1684
1685 if ch.modes == nil {
1686 // we haven't received the initial RPL_CHANNELMODEIS yet
1687 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1688 return nil
1689 }
1690
1691 modeStr, modeParams := ch.modes.Format()
1692 params := []string{dc.nick, name, modeStr}
1693 params = append(params, modeParams...)
1694
1695 dc.SendMessage(&irc.Message{
1696 Prefix: dc.srv.prefix(),
1697 Command: irc.RPL_CHANNELMODEIS,
1698 Params: params,
1699 })
1700 if ch.creationTime != "" {
1701 dc.SendMessage(&irc.Message{
1702 Prefix: dc.srv.prefix(),
1703 Command: rpl_creationtime,
1704 Params: []string{dc.nick, name, ch.creationTime},
1705 })
1706 }
1707 }
1708 case "TOPIC":
1709 var channel string
1710 if err := parseMessageParams(msg, &channel); err != nil {
1711 return err
1712 }
1713
1714 uc, upstreamName, err := dc.unmarshalEntity(channel)
1715 if err != nil {
1716 return err
1717 }
1718
1719 if len(msg.Params) > 1 { // setting topic
1720 topic := msg.Params[1]
1721 uc.SendMessageLabeled(dc.id, &irc.Message{
1722 Command: "TOPIC",
1723 Params: []string{upstreamName, topic},
1724 })
1725 } else { // getting topic
1726 ch := uc.channels.Value(upstreamName)
1727 if ch == nil {
1728 return ircError{&irc.Message{
1729 Command: irc.ERR_NOSUCHCHANNEL,
1730 Params: []string{dc.nick, upstreamName, "No such channel"},
1731 }}
1732 }
1733 sendTopic(dc, ch)
1734 }
1735 case "LIST":
1736 // TODO: support ELIST when supported by all upstreams
1737
1738 pl := pendingLIST{
1739 downstreamID: dc.id,
1740 pendingCommands: make(map[int64]*irc.Message),
1741 }
1742 var upstream *upstreamConn
1743 var upstreamChannels map[int64][]string
1744 if len(msg.Params) > 0 {
1745 uc, upstreamMask, err := dc.unmarshalEntity(msg.Params[0])
1746 if err == nil && upstreamMask == "*" { // LIST */network: send LIST only to one network
1747 upstream = uc
1748 } else {
1749 upstreamChannels = make(map[int64][]string)
1750 channels := strings.Split(msg.Params[0], ",")
1751 for _, channel := range channels {
1752 uc, upstreamChannel, err := dc.unmarshalEntity(channel)
1753 if err != nil {
1754 return err
1755 }
1756 upstreamChannels[uc.network.ID] = append(upstreamChannels[uc.network.ID], upstreamChannel)
1757 }
1758 }
1759 }
1760
1761 dc.user.pendingLISTs = append(dc.user.pendingLISTs, pl)
1762 dc.forEachUpstream(func(uc *upstreamConn) {
1763 if upstream != nil && upstream != uc {
1764 return
1765 }
1766 var params []string
1767 if upstreamChannels != nil {
1768 if channels, ok := upstreamChannels[uc.network.ID]; ok {
1769 params = []string{strings.Join(channels, ",")}
1770 } else {
1771 return
1772 }
1773 }
1774 pl.pendingCommands[uc.network.ID] = &irc.Message{
1775 Command: "LIST",
1776 Params: params,
1777 }
1778 uc.trySendLIST(dc.id)
1779 })
1780 case "NAMES":
1781 if len(msg.Params) == 0 {
1782 dc.SendMessage(&irc.Message{
1783 Prefix: dc.srv.prefix(),
1784 Command: irc.RPL_ENDOFNAMES,
1785 Params: []string{dc.nick, "*", "End of /NAMES list"},
1786 })
1787 return nil
1788 }
1789
1790 channels := strings.Split(msg.Params[0], ",")
1791 for _, channel := range channels {
1792 uc, upstreamName, err := dc.unmarshalEntity(channel)
1793 if err != nil {
1794 return err
1795 }
1796
1797 ch := uc.channels.Value(upstreamName)
1798 if ch != nil {
1799 sendNames(dc, ch)
1800 } else {
1801 // NAMES on a channel we have not joined, ask upstream
1802 uc.SendMessageLabeled(dc.id, &irc.Message{
1803 Command: "NAMES",
1804 Params: []string{upstreamName},
1805 })
1806 }
1807 }
1808 case "WHO":
1809 if len(msg.Params) == 0 {
1810 // TODO: support WHO without parameters
1811 dc.SendMessage(&irc.Message{
1812 Prefix: dc.srv.prefix(),
1813 Command: irc.RPL_ENDOFWHO,
1814 Params: []string{dc.nick, "*", "End of /WHO list"},
1815 })
1816 return nil
1817 }
1818
1819 // TODO: support WHO masks
1820 entity := msg.Params[0]
1821 entityCM := casemapASCII(entity)
1822
1823 if dc.network == nil && entityCM == dc.nickCM {
1824 // TODO: support AWAY (H/G) in self WHO reply
1825 dc.SendMessage(&irc.Message{
1826 Prefix: dc.srv.prefix(),
1827 Command: irc.RPL_WHOREPLY,
1828 Params: []string{dc.nick, "*", dc.user.Username, dc.hostname, dc.srv.Hostname, dc.nick, "H", "0 " + dc.realname},
1829 })
1830 dc.SendMessage(&irc.Message{
1831 Prefix: dc.srv.prefix(),
1832 Command: irc.RPL_ENDOFWHO,
1833 Params: []string{dc.nick, dc.nick, "End of /WHO list"},
1834 })
1835 return nil
1836 }
1837 if entityCM == serviceNickCM {
1838 dc.SendMessage(&irc.Message{
1839 Prefix: dc.srv.prefix(),
1840 Command: irc.RPL_WHOREPLY,
1841 Params: []string{serviceNick, "*", servicePrefix.User, servicePrefix.Host, dc.srv.Hostname, serviceNick, "H", "0 " + serviceRealname},
1842 })
1843 dc.SendMessage(&irc.Message{
1844 Prefix: dc.srv.prefix(),
1845 Command: irc.RPL_ENDOFWHO,
1846 Params: []string{dc.nick, serviceNick, "End of /WHO list"},
1847 })
1848 return nil
1849 }
1850
1851 uc, upstreamName, err := dc.unmarshalEntity(entity)
1852 if err != nil {
1853 return err
1854 }
1855
1856 var params []string
1857 if len(msg.Params) == 2 {
1858 params = []string{upstreamName, msg.Params[1]}
1859 } else {
1860 params = []string{upstreamName}
1861 }
1862
1863 uc.SendMessageLabeled(dc.id, &irc.Message{
1864 Command: "WHO",
1865 Params: params,
1866 })
1867 case "WHOIS":
1868 if len(msg.Params) == 0 {
1869 return ircError{&irc.Message{
1870 Command: irc.ERR_NONICKNAMEGIVEN,
1871 Params: []string{dc.nick, "No nickname given"},
1872 }}
1873 }
1874
1875 var target, mask string
1876 if len(msg.Params) == 1 {
1877 target = ""
1878 mask = msg.Params[0]
1879 } else {
1880 target = msg.Params[0]
1881 mask = msg.Params[1]
1882 }
1883 // TODO: support multiple WHOIS users
1884 if i := strings.IndexByte(mask, ','); i >= 0 {
1885 mask = mask[:i]
1886 }
1887
1888 if dc.network == nil && casemapASCII(mask) == dc.nickCM {
1889 dc.SendMessage(&irc.Message{
1890 Prefix: dc.srv.prefix(),
1891 Command: irc.RPL_WHOISUSER,
1892 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
1893 })
1894 dc.SendMessage(&irc.Message{
1895 Prefix: dc.srv.prefix(),
1896 Command: irc.RPL_WHOISSERVER,
1897 Params: []string{dc.nick, dc.nick, dc.srv.Hostname, "soju"},
1898 })
1899 dc.SendMessage(&irc.Message{
1900 Prefix: dc.srv.prefix(),
1901 Command: irc.RPL_ENDOFWHOIS,
1902 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
1903 })
1904 return nil
1905 }
1906 if casemapASCII(mask) == serviceNickCM {
1907 dc.SendMessage(&irc.Message{
1908 Prefix: dc.srv.prefix(),
1909 Command: irc.RPL_WHOISUSER,
1910 Params: []string{dc.nick, serviceNick, servicePrefix.User, servicePrefix.Host, "*", serviceRealname},
1911 })
1912 dc.SendMessage(&irc.Message{
1913 Prefix: dc.srv.prefix(),
1914 Command: irc.RPL_WHOISSERVER,
1915 Params: []string{dc.nick, serviceNick, dc.srv.Hostname, "soju"},
1916 })
1917 dc.SendMessage(&irc.Message{
1918 Prefix: dc.srv.prefix(),
1919 Command: irc.RPL_ENDOFWHOIS,
1920 Params: []string{dc.nick, serviceNick, "End of /WHOIS list"},
1921 })
1922 return nil
1923 }
1924
1925 // TODO: support WHOIS masks
1926 uc, upstreamNick, err := dc.unmarshalEntity(mask)
1927 if err != nil {
1928 return err
1929 }
1930
1931 var params []string
1932 if target != "" {
1933 if target == mask { // WHOIS nick nick
1934 params = []string{upstreamNick, upstreamNick}
1935 } else {
1936 params = []string{target, upstreamNick}
1937 }
1938 } else {
1939 params = []string{upstreamNick}
1940 }
1941
1942 uc.SendMessageLabeled(dc.id, &irc.Message{
1943 Command: "WHOIS",
1944 Params: params,
1945 })
1946 case "PRIVMSG", "NOTICE":
1947 var targetsStr, text string
1948 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
1949 return err
1950 }
1951 tags := copyClientTags(msg.Tags)
1952
1953 for _, name := range strings.Split(targetsStr, ",") {
1954 if name == "$"+dc.srv.Hostname || (name == "$*" && dc.network == nil) {
1955 // "$" means a server mask follows. If it's the bouncer's
1956 // hostname, broadcast the message to all bouncer users.
1957 if !dc.user.Admin {
1958 return ircError{&irc.Message{
1959 Prefix: dc.srv.prefix(),
1960 Command: irc.ERR_BADMASK,
1961 Params: []string{dc.nick, name, "Permission denied to broadcast message to all bouncer users"},
1962 }}
1963 }
1964
1965 dc.logger.Printf("broadcasting bouncer-wide %v: %v", msg.Command, text)
1966
1967 broadcastTags := tags.Copy()
1968 broadcastTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
1969 broadcastMsg := &irc.Message{
1970 Tags: broadcastTags,
1971 Prefix: servicePrefix,
1972 Command: msg.Command,
1973 Params: []string{name, text},
1974 }
1975 dc.srv.forEachUser(func(u *user) {
1976 u.events <- eventBroadcast{broadcastMsg}
1977 })
1978 continue
1979 }
1980
1981 if dc.network == nil && casemapASCII(name) == dc.nickCM {
1982 dc.SendMessage(&irc.Message{
1983 Tags: msg.Tags.Copy(),
1984 Prefix: dc.prefix(),
1985 Command: msg.Command,
1986 Params: []string{name, text},
1987 })
1988 continue
1989 }
1990
1991 if msg.Command == "PRIVMSG" && casemapASCII(name) == serviceNickCM {
1992 if dc.caps["echo-message"] {
1993 echoTags := tags.Copy()
1994 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
1995 dc.SendMessage(&irc.Message{
1996 Tags: echoTags,
1997 Prefix: dc.prefix(),
1998 Command: msg.Command,
1999 Params: []string{name, text},
2000 })
2001 }
2002 handleServicePRIVMSG(dc, text)
2003 continue
2004 }
2005
2006 uc, upstreamName, err := dc.unmarshalEntity(name)
2007 if err != nil {
2008 return err
2009 }
2010
2011 if msg.Command == "PRIVMSG" && uc.network.casemap(upstreamName) == "nickserv" {
2012 dc.handleNickServPRIVMSG(uc, text)
2013 }
2014
2015 unmarshaledText := text
2016 if uc.isChannel(upstreamName) {
2017 unmarshaledText = dc.unmarshalText(uc, text)
2018 }
2019 uc.SendMessageLabeled(dc.id, &irc.Message{
2020 Tags: tags,
2021 Command: msg.Command,
2022 Params: []string{upstreamName, unmarshaledText},
2023 })
2024
2025 echoTags := tags.Copy()
2026 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2027 if uc.account != "" {
2028 echoTags["account"] = irc.TagValue(uc.account)
2029 }
2030 echoMsg := &irc.Message{
2031 Tags: echoTags,
2032 Prefix: &irc.Prefix{
2033 Name: uc.nick,
2034 User: uc.username,
2035 },
2036 Command: msg.Command,
2037 Params: []string{upstreamName, text},
2038 }
2039 uc.produce(upstreamName, echoMsg, dc)
2040
2041 uc.updateChannelAutoDetach(upstreamName)
2042 }
2043 case "TAGMSG":
2044 var targetsStr string
2045 if err := parseMessageParams(msg, &targetsStr); err != nil {
2046 return err
2047 }
2048 tags := copyClientTags(msg.Tags)
2049
2050 for _, name := range strings.Split(targetsStr, ",") {
2051 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2052 dc.SendMessage(&irc.Message{
2053 Tags: msg.Tags.Copy(),
2054 Prefix: dc.prefix(),
2055 Command: "TAGMSG",
2056 Params: []string{name},
2057 })
2058 continue
2059 }
2060
2061 if casemapASCII(name) == serviceNickCM {
2062 continue
2063 }
2064
2065 uc, upstreamName, err := dc.unmarshalEntity(name)
2066 if err != nil {
2067 return err
2068 }
2069 if _, ok := uc.caps["message-tags"]; !ok {
2070 continue
2071 }
2072
2073 uc.SendMessageLabeled(dc.id, &irc.Message{
2074 Tags: tags,
2075 Command: "TAGMSG",
2076 Params: []string{upstreamName},
2077 })
2078
2079 uc.updateChannelAutoDetach(upstreamName)
2080 }
2081 case "INVITE":
2082 var user, channel string
2083 if err := parseMessageParams(msg, &user, &channel); err != nil {
2084 return err
2085 }
2086
2087 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
2088 if err != nil {
2089 return err
2090 }
2091
2092 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
2093 if err != nil {
2094 return err
2095 }
2096
2097 if ucChannel != ucUser {
2098 return ircError{&irc.Message{
2099 Command: irc.ERR_USERNOTINCHANNEL,
2100 Params: []string{dc.nick, user, channel, "They are on another network"},
2101 }}
2102 }
2103 uc := ucChannel
2104
2105 uc.SendMessageLabeled(dc.id, &irc.Message{
2106 Command: "INVITE",
2107 Params: []string{upstreamUser, upstreamChannel},
2108 })
2109 case "CHATHISTORY":
2110 var subcommand string
2111 if err := parseMessageParams(msg, &subcommand); err != nil {
2112 return err
2113 }
2114 var target, limitStr string
2115 var boundsStr [2]string
2116 switch subcommand {
2117 case "AFTER", "BEFORE":
2118 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &limitStr); err != nil {
2119 return err
2120 }
2121 case "BETWEEN":
2122 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2123 return err
2124 }
2125 case "TARGETS":
2126 if err := parseMessageParams(msg, nil, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2127 return err
2128 }
2129 default:
2130 // TODO: support LATEST, AROUND
2131 return ircError{&irc.Message{
2132 Command: "FAIL",
2133 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, "Unknown command"},
2134 }}
2135 }
2136
2137 // We don't save history for our service
2138 if casemapASCII(target) == serviceNickCM {
2139 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {})
2140 return nil
2141 }
2142
2143 store, ok := dc.user.msgStore.(chatHistoryMessageStore)
2144 if !ok {
2145 return ircError{&irc.Message{
2146 Command: irc.ERR_UNKNOWNCOMMAND,
2147 Params: []string{dc.nick, "CHATHISTORY", "Unknown command"},
2148 }}
2149 }
2150
2151 network, entity, err := dc.unmarshalEntityNetwork(target)
2152 if err != nil {
2153 return err
2154 }
2155 entity = network.casemap(entity)
2156
2157 // TODO: support msgid criteria
2158 var bounds [2]time.Time
2159 bounds[0] = parseChatHistoryBound(boundsStr[0])
2160 if bounds[0].IsZero() {
2161 return ircError{&irc.Message{
2162 Command: "FAIL",
2163 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[0], "Invalid first bound"},
2164 }}
2165 }
2166
2167 if boundsStr[1] != "" {
2168 bounds[1] = parseChatHistoryBound(boundsStr[1])
2169 if bounds[1].IsZero() {
2170 return ircError{&irc.Message{
2171 Command: "FAIL",
2172 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[1], "Invalid second bound"},
2173 }}
2174 }
2175 }
2176
2177 limit, err := strconv.Atoi(limitStr)
2178 if err != nil || limit < 0 || limit > dc.srv.HistoryLimit {
2179 return ircError{&irc.Message{
2180 Command: "FAIL",
2181 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, limitStr, "Invalid limit"},
2182 }}
2183 }
2184
2185 var history []*irc.Message
2186 switch subcommand {
2187 case "BEFORE":
2188 history, err = store.LoadBeforeTime(network, entity, bounds[0], time.Time{}, limit)
2189 case "AFTER":
2190 history, err = store.LoadAfterTime(network, entity, bounds[0], time.Now(), limit)
2191 case "BETWEEN":
2192 if bounds[0].Before(bounds[1]) {
2193 history, err = store.LoadAfterTime(network, entity, bounds[0], bounds[1], limit)
2194 } else {
2195 history, err = store.LoadBeforeTime(network, entity, bounds[0], bounds[1], limit)
2196 }
2197 case "TARGETS":
2198 // TODO: support TARGETS in multi-upstream mode
2199 targets, err := store.ListTargets(network, bounds[0], bounds[1], limit)
2200 if err != nil {
2201 dc.logger.Printf("failed fetching targets for chathistory: %v", err)
2202 return ircError{&irc.Message{
2203 Command: "FAIL",
2204 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, "Failed to retrieve targets"},
2205 }}
2206 }
2207
2208 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {
2209 for _, target := range targets {
2210 if ch := network.channels.Value(target.Name); ch != nil && ch.Detached {
2211 continue
2212 }
2213
2214 dc.SendMessage(&irc.Message{
2215 Tags: irc.Tags{"batch": batchRef},
2216 Prefix: dc.srv.prefix(),
2217 Command: "CHATHISTORY",
2218 Params: []string{"TARGETS", target.Name, target.LatestMessage.UTC().Format(serverTimeLayout)},
2219 })
2220 }
2221 })
2222
2223 return nil
2224 }
2225 if err != nil {
2226 dc.logger.Printf("failed fetching %q messages for chathistory: %v", target, err)
2227 return newChatHistoryError(subcommand, target)
2228 }
2229
2230 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {
2231 for _, msg := range history {
2232 msg.Tags["batch"] = batchRef
2233 dc.SendMessage(dc.marshalMessage(msg, network))
2234 }
2235 })
2236 case "BOUNCER":
2237 var subcommand string
2238 if err := parseMessageParams(msg, &subcommand); err != nil {
2239 return err
2240 }
2241
2242 switch strings.ToUpper(subcommand) {
2243 case "LISTNETWORKS":
2244 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
2245 dc.user.forEachNetwork(func(network *network) {
2246 idStr := fmt.Sprintf("%v", network.ID)
2247 attrs := getNetworkAttrs(network)
2248 dc.SendMessage(&irc.Message{
2249 Tags: irc.Tags{"batch": batchRef},
2250 Prefix: dc.srv.prefix(),
2251 Command: "BOUNCER",
2252 Params: []string{"NETWORK", idStr, attrs.String()},
2253 })
2254 })
2255 })
2256 case "ADDNETWORK":
2257 var attrsStr string
2258 if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
2259 return err
2260 }
2261 attrs := irc.ParseTags(attrsStr)
2262
2263 host, ok := attrs.GetTag("host")
2264 if !ok {
2265 return ircError{&irc.Message{
2266 Command: "FAIL",
2267 Params: []string{"BOUNCER", "NEED_ATTRIBUTE", subcommand, "host", "Missing required host attribute"},
2268 }}
2269 }
2270
2271 addr := host
2272 if port, ok := attrs.GetTag("port"); ok {
2273 addr += ":" + port
2274 }
2275
2276 if tlsStr, ok := attrs.GetTag("tls"); ok && tlsStr == "0" {
2277 addr = "irc+insecure://" + tlsStr
2278 }
2279
2280 nick, ok := attrs.GetTag("nickname")
2281 if !ok {
2282 nick = dc.nick
2283 }
2284
2285 username, _ := attrs.GetTag("username")
2286 realname, _ := attrs.GetTag("realname")
2287 pass, _ := attrs.GetTag("pass")
2288
2289 if realname == dc.user.Realname {
2290 realname = ""
2291 }
2292
2293 // TODO: reject unknown attributes
2294
2295 record := &Network{
2296 Addr: addr,
2297 Nick: nick,
2298 Username: username,
2299 Realname: realname,
2300 Pass: pass,
2301 Enabled: true,
2302 }
2303 network, err := dc.user.createNetwork(record)
2304 if err != nil {
2305 return ircError{&irc.Message{
2306 Command: "FAIL",
2307 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
2308 }}
2309 }
2310
2311 dc.SendMessage(&irc.Message{
2312 Prefix: dc.srv.prefix(),
2313 Command: "BOUNCER",
2314 Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
2315 })
2316 case "CHANGENETWORK":
2317 var idStr, attrsStr string
2318 if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
2319 return err
2320 }
2321 id, err := parseBouncerNetID(subcommand, idStr)
2322 if err != nil {
2323 return err
2324 }
2325 attrs := irc.ParseTags(attrsStr)
2326
2327 net := dc.user.getNetworkByID(id)
2328 if net == nil {
2329 return ircError{&irc.Message{
2330 Command: "FAIL",
2331 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2332 }}
2333 }
2334
2335 record := net.Network // copy network record because we'll mutate it
2336 for k, v := range attrs {
2337 s := string(v)
2338 switch k {
2339 // TODO: host, port, tls
2340 case "nickname":
2341 record.Nick = s
2342 case "username":
2343 record.Username = s
2344 case "realname":
2345 record.Realname = s
2346 case "pass":
2347 record.Pass = s
2348 default:
2349 return ircError{&irc.Message{
2350 Command: "FAIL",
2351 Params: []string{"BOUNCER", "UNKNOWN_ATTRIBUTE", subcommand, k, "Unknown attribute"},
2352 }}
2353 }
2354 }
2355
2356 _, err = dc.user.updateNetwork(&record)
2357 if err != nil {
2358 return ircError{&irc.Message{
2359 Command: "FAIL",
2360 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
2361 }}
2362 }
2363
2364 dc.SendMessage(&irc.Message{
2365 Prefix: dc.srv.prefix(),
2366 Command: "BOUNCER",
2367 Params: []string{"CHANGENETWORK", idStr},
2368 })
2369 case "DELNETWORK":
2370 var idStr string
2371 if err := parseMessageParams(msg, nil, &idStr); err != nil {
2372 return err
2373 }
2374 id, err := parseBouncerNetID(subcommand, idStr)
2375 if err != nil {
2376 return err
2377 }
2378
2379 net := dc.user.getNetworkByID(id)
2380 if net == nil {
2381 return ircError{&irc.Message{
2382 Command: "FAIL",
2383 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2384 }}
2385 }
2386
2387 if err := dc.user.deleteNetwork(net.ID); err != nil {
2388 return err
2389 }
2390
2391 dc.SendMessage(&irc.Message{
2392 Prefix: dc.srv.prefix(),
2393 Command: "BOUNCER",
2394 Params: []string{"DELNETWORK", idStr},
2395 })
2396 default:
2397 return ircError{&irc.Message{
2398 Command: "FAIL",
2399 Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
2400 }}
2401 }
2402 default:
2403 dc.logger.Printf("unhandled message: %v", msg)
2404
2405 // Only forward unknown commands in single-upstream mode
2406 uc := dc.upstream()
2407 if uc == nil {
2408 return newUnknownCommandError(msg.Command)
2409 }
2410
2411 uc.SendMessageLabeled(dc.id, msg)
2412 }
2413 return nil
2414}
2415
2416func (dc *downstreamConn) handleNickServPRIVMSG(uc *upstreamConn, text string) {
2417 username, password, ok := parseNickServCredentials(text, uc.nick)
2418 if !ok {
2419 return
2420 }
2421
2422 // User may have e.g. EXTERNAL mechanism configured. We do not want to
2423 // automatically erase the key pair or any other credentials.
2424 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
2425 return
2426 }
2427
2428 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
2429 n := uc.network
2430 n.SASL.Mechanism = "PLAIN"
2431 n.SASL.Plain.Username = username
2432 n.SASL.Plain.Password = password
2433 if err := dc.srv.db.StoreNetwork(dc.user.ID, &n.Network); err != nil {
2434 dc.logger.Printf("failed to save NickServ credentials: %v", err)
2435 }
2436}
2437
2438func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
2439 fields := strings.Fields(text)
2440 if len(fields) < 2 {
2441 return "", "", false
2442 }
2443 cmd := strings.ToUpper(fields[0])
2444 params := fields[1:]
2445 switch cmd {
2446 case "REGISTER":
2447 username = nick
2448 password = params[0]
2449 case "IDENTIFY":
2450 if len(params) == 1 {
2451 username = nick
2452 password = params[0]
2453 } else {
2454 username = params[0]
2455 password = params[1]
2456 }
2457 case "SET":
2458 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
2459 username = nick
2460 password = params[1]
2461 }
2462 default:
2463 return "", "", false
2464 }
2465 return username, password, true
2466}
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