source: code/trunk/downstream.go@ 659

Last change on this file since 659 was 659, checked in by contact, 4 years ago

Fix operator flag in RPL_WHOREPLY

@ and + indicate channel privileges. * indicates that the user is
a server operator.
File size: 63.0 KB
Line 
1package soju
2
3import (
4 "context"
5 "crypto/tls"
6 "encoding/base64"
7 "errors"
8 "fmt"
9 "io"
10 "net"
11 "strconv"
12 "strings"
13 "time"
14
15 "github.com/emersion/go-sasl"
16 "golang.org/x/crypto/bcrypt"
17 "gopkg.in/irc.v3"
18)
19
20type ircError struct {
21 Message *irc.Message
22}
23
24func (err ircError) Error() string {
25 return err.Message.String()
26}
27
28func newUnknownCommandError(cmd string) ircError {
29 return ircError{&irc.Message{
30 Command: irc.ERR_UNKNOWNCOMMAND,
31 Params: []string{
32 "*",
33 cmd,
34 "Unknown command",
35 },
36 }}
37}
38
39func newNeedMoreParamsError(cmd string) ircError {
40 return ircError{&irc.Message{
41 Command: irc.ERR_NEEDMOREPARAMS,
42 Params: []string{
43 "*",
44 cmd,
45 "Not enough parameters",
46 },
47 }}
48}
49
50func newChatHistoryError(subcommand string, target string) ircError {
51 return ircError{&irc.Message{
52 Command: "FAIL",
53 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, target, "Messages could not be retrieved"},
54 }}
55}
56
57var errAuthFailed = ircError{&irc.Message{
58 Command: irc.ERR_PASSWDMISMATCH,
59 Params: []string{"*", "Invalid username or password"},
60}}
61
62func parseBouncerNetID(subcommand, s string) (int64, error) {
63 id, err := strconv.ParseInt(s, 10, 64)
64 if err != nil {
65 return 0, ircError{&irc.Message{
66 Command: "FAIL",
67 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, s, "Invalid network ID"},
68 }}
69 }
70 return id, nil
71}
72
73func fillNetworkAddrAttrs(attrs irc.Tags, network *Network) {
74 u, err := network.URL()
75 if err != nil {
76 return
77 }
78
79 hasHostPort := true
80 switch u.Scheme {
81 case "ircs":
82 attrs["tls"] = irc.TagValue("1")
83 case "irc+insecure":
84 attrs["tls"] = irc.TagValue("0")
85 default: // e.g. unix://
86 hasHostPort = false
87 }
88 if host, port, err := net.SplitHostPort(u.Host); err == nil && hasHostPort {
89 attrs["host"] = irc.TagValue(host)
90 attrs["port"] = irc.TagValue(port)
91 } else if hasHostPort {
92 attrs["host"] = irc.TagValue(u.Host)
93 }
94}
95
96func getNetworkAttrs(network *network) irc.Tags {
97 state := "disconnected"
98 if uc := network.conn; uc != nil {
99 state = "connected"
100 }
101
102 attrs := irc.Tags{
103 "name": irc.TagValue(network.GetName()),
104 "state": irc.TagValue(state),
105 "nickname": irc.TagValue(network.Nick),
106 }
107
108 if network.Username != "" {
109 attrs["username"] = irc.TagValue(network.Username)
110 }
111 if realname := GetRealname(&network.user.User, &network.Network); realname != "" {
112 attrs["realname"] = irc.TagValue(realname)
113 }
114
115 fillNetworkAddrAttrs(attrs, &network.Network)
116
117 return attrs
118}
119
120func networkAddrFromAttrs(attrs irc.Tags) string {
121 host, ok := attrs.GetTag("host")
122 if !ok {
123 return ""
124 }
125
126 addr := host
127 if port, ok := attrs.GetTag("port"); ok {
128 addr += ":" + port
129 }
130
131 if tlsStr, ok := attrs.GetTag("tls"); ok && tlsStr == "0" {
132 addr = "irc+insecure://" + tlsStr
133 }
134
135 return addr
136}
137
138func updateNetworkAttrs(record *Network, attrs irc.Tags, subcommand string) error {
139 addrAttrs := irc.Tags{}
140 fillNetworkAddrAttrs(addrAttrs, record)
141
142 updateAddr := false
143 for k, v := range attrs {
144 s := string(v)
145 switch k {
146 case "host", "port", "tls":
147 updateAddr = true
148 addrAttrs[k] = v
149 case "name":
150 record.Name = s
151 case "nickname":
152 record.Nick = s
153 case "username":
154 record.Username = s
155 case "realname":
156 record.Realname = s
157 case "pass":
158 record.Pass = s
159 default:
160 return ircError{&irc.Message{
161 Command: "FAIL",
162 Params: []string{"BOUNCER", "UNKNOWN_ATTRIBUTE", subcommand, k, "Unknown attribute"},
163 }}
164 }
165 }
166
167 if updateAddr {
168 record.Addr = networkAddrFromAttrs(addrAttrs)
169 if record.Addr == "" {
170 return ircError{&irc.Message{
171 Command: "FAIL",
172 Params: []string{"BOUNCER", "NEED_ATTRIBUTE", subcommand, "host", "Missing required host attribute"},
173 }}
174 }
175 }
176
177 return nil
178}
179
180// ' ' and ':' break the IRC message wire format, '@' and '!' break prefixes,
181// '*' and '?' break masks, '$' breaks server masks in PRIVMSG/NOTICE
182const illegalNickChars = " :@!*?$"
183
184// permanentDownstreamCaps is the list of always-supported downstream
185// capabilities.
186var permanentDownstreamCaps = map[string]string{
187 "batch": "",
188 "cap-notify": "",
189 "echo-message": "",
190 "invite-notify": "",
191 "message-tags": "",
192 "sasl": "PLAIN",
193 "server-time": "",
194 "setname": "",
195
196 "soju.im/bouncer-networks": "",
197 "soju.im/bouncer-networks-notify": "",
198}
199
200// needAllDownstreamCaps is the list of downstream capabilities that
201// require support from all upstreams to be enabled
202var needAllDownstreamCaps = map[string]string{
203 "account-notify": "",
204 "account-tag": "",
205 "away-notify": "",
206 "extended-join": "",
207 "multi-prefix": "",
208}
209
210// passthroughIsupport is the set of ISUPPORT tokens that are directly passed
211// through from the upstream server to downstream clients.
212//
213// This is only effective in single-upstream mode.
214var passthroughIsupport = map[string]bool{
215 "AWAYLEN": true,
216 "BOT": true,
217 "CHANLIMIT": true,
218 "CHANMODES": true,
219 "CHANNELLEN": true,
220 "CHANTYPES": true,
221 "CLIENTTAGDENY": true,
222 "EXCEPTS": true,
223 "EXTBAN": true,
224 "HOSTLEN": true,
225 "INVEX": true,
226 "KICKLEN": true,
227 "MAXLIST": true,
228 "MAXTARGETS": true,
229 "MODES": true,
230 "NAMELEN": true,
231 "NETWORK": true,
232 "NICKLEN": true,
233 "PREFIX": true,
234 "SAFELIST": true,
235 "TARGMAX": true,
236 "TOPICLEN": true,
237 "USERLEN": true,
238 "UTF8ONLY": true,
239}
240
241type downstreamConn struct {
242 conn
243
244 id uint64
245
246 registered bool
247 user *user
248 nick string
249 nickCM string
250 rawUsername string
251 networkName string
252 clientName string
253 realname string
254 hostname string
255 password string // empty after authentication
256 network *network // can be nil
257
258 negotiatingCaps bool
259 capVersion int
260 supportedCaps map[string]string
261 caps map[string]bool
262
263 lastBatchRef uint64
264
265 saslServer sasl.Server
266}
267
268func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
269 remoteAddr := ic.RemoteAddr().String()
270 logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
271 options := connOptions{Logger: logger}
272 dc := &downstreamConn{
273 conn: *newConn(srv, ic, &options),
274 id: id,
275 supportedCaps: make(map[string]string),
276 caps: make(map[string]bool),
277 }
278 dc.hostname = remoteAddr
279 if host, _, err := net.SplitHostPort(dc.hostname); err == nil {
280 dc.hostname = host
281 }
282 for k, v := range permanentDownstreamCaps {
283 dc.supportedCaps[k] = v
284 }
285 if srv.LogPath != "" {
286 dc.supportedCaps["draft/chathistory"] = ""
287 }
288 return dc
289}
290
291func (dc *downstreamConn) prefix() *irc.Prefix {
292 return &irc.Prefix{
293 Name: dc.nick,
294 User: dc.user.Username,
295 Host: dc.hostname,
296 }
297}
298
299func (dc *downstreamConn) forEachNetwork(f func(*network)) {
300 if dc.network != nil {
301 f(dc.network)
302 } else if !dc.caps["soju.im/bouncer-networks"] {
303 dc.user.forEachNetwork(f)
304 }
305}
306
307func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
308 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
309 return
310 }
311 dc.user.forEachUpstream(func(uc *upstreamConn) {
312 if dc.network != nil && uc.network != dc.network {
313 return
314 }
315 f(uc)
316 })
317}
318
319// upstream returns the upstream connection, if any. If there are zero or if
320// there are multiple upstream connections, it returns nil.
321func (dc *downstreamConn) upstream() *upstreamConn {
322 if dc.network == nil {
323 return nil
324 }
325 return dc.network.conn
326}
327
328func isOurNick(net *network, nick string) bool {
329 // TODO: this doesn't account for nick changes
330 if net.conn != nil {
331 return net.casemap(nick) == net.conn.nickCM
332 }
333 // We're not currently connected to the upstream connection, so we don't
334 // know whether this name is our nickname. Best-effort: use the network's
335 // configured nickname and hope it was the one being used when we were
336 // connected.
337 return net.casemap(nick) == net.casemap(net.Nick)
338}
339
340// marshalEntity converts an upstream entity name (ie. channel or nick) into a
341// downstream entity name.
342//
343// This involves adding a "/<network>" suffix if the entity isn't the current
344// user.
345func (dc *downstreamConn) marshalEntity(net *network, name string) string {
346 if isOurNick(net, name) {
347 return dc.nick
348 }
349 name = partialCasemap(net.casemap, name)
350 if dc.network != nil {
351 if dc.network != net {
352 panic("soju: tried to marshal an entity for another network")
353 }
354 return name
355 }
356 return name + "/" + net.GetName()
357}
358
359func (dc *downstreamConn) marshalUserPrefix(net *network, prefix *irc.Prefix) *irc.Prefix {
360 if isOurNick(net, prefix.Name) {
361 return dc.prefix()
362 }
363 prefix.Name = partialCasemap(net.casemap, prefix.Name)
364 if dc.network != nil {
365 if dc.network != net {
366 panic("soju: tried to marshal a user prefix for another network")
367 }
368 return prefix
369 }
370 return &irc.Prefix{
371 Name: prefix.Name + "/" + net.GetName(),
372 User: prefix.User,
373 Host: prefix.Host,
374 }
375}
376
377// unmarshalEntityNetwork converts a downstream entity name (ie. channel or
378// nick) into an upstream entity name.
379//
380// This involves removing the "/<network>" suffix.
381func (dc *downstreamConn) unmarshalEntityNetwork(name string) (*network, string, error) {
382 if dc.network != nil {
383 return dc.network, name, nil
384 }
385
386 var net *network
387 if i := strings.LastIndexByte(name, '/'); i >= 0 {
388 network := name[i+1:]
389 name = name[:i]
390
391 for _, n := range dc.user.networks {
392 if network == n.GetName() {
393 net = n
394 break
395 }
396 }
397 }
398
399 if net == nil {
400 return nil, "", ircError{&irc.Message{
401 Command: irc.ERR_NOSUCHCHANNEL,
402 Params: []string{name, "Missing network suffix in name"},
403 }}
404 }
405
406 return net, name, nil
407}
408
409// unmarshalEntity is the same as unmarshalEntityNetwork, but returns the
410// upstream connection and fails if the upstream is disconnected.
411func (dc *downstreamConn) unmarshalEntity(name string) (*upstreamConn, string, error) {
412 net, name, err := dc.unmarshalEntityNetwork(name)
413 if err != nil {
414 return nil, "", err
415 }
416
417 if net.conn == nil {
418 return nil, "", ircError{&irc.Message{
419 Command: irc.ERR_NOSUCHCHANNEL,
420 Params: []string{name, "Disconnected from upstream network"},
421 }}
422 }
423
424 return net.conn, name, nil
425}
426
427func (dc *downstreamConn) unmarshalText(uc *upstreamConn, text string) string {
428 if dc.upstream() != nil {
429 return text
430 }
431 // TODO: smarter parsing that ignores URLs
432 return strings.ReplaceAll(text, "/"+uc.network.GetName(), "")
433}
434
435func (dc *downstreamConn) readMessages(ch chan<- event) error {
436 for {
437 msg, err := dc.ReadMessage()
438 if errors.Is(err, io.EOF) {
439 break
440 } else if err != nil {
441 return fmt.Errorf("failed to read IRC command: %v", err)
442 }
443
444 ch <- eventDownstreamMessage{msg, dc}
445 }
446
447 return nil
448}
449
450// SendMessage sends an outgoing message.
451//
452// This can only called from the user goroutine.
453func (dc *downstreamConn) SendMessage(msg *irc.Message) {
454 if !dc.caps["message-tags"] {
455 if msg.Command == "TAGMSG" {
456 return
457 }
458 msg = msg.Copy()
459 for name := range msg.Tags {
460 supported := false
461 switch name {
462 case "time":
463 supported = dc.caps["server-time"]
464 case "account":
465 supported = dc.caps["account"]
466 }
467 if !supported {
468 delete(msg.Tags, name)
469 }
470 }
471 }
472 if !dc.caps["batch"] && msg.Tags["batch"] != "" {
473 msg = msg.Copy()
474 delete(msg.Tags, "batch")
475 }
476 if msg.Command == "JOIN" && !dc.caps["extended-join"] {
477 msg.Params = msg.Params[:1]
478 }
479 if msg.Command == "SETNAME" && !dc.caps["setname"] {
480 return
481 }
482 if msg.Command == "AWAY" && !dc.caps["away-notify"] {
483 return
484 }
485 if msg.Command == "ACCOUNT" && !dc.caps["account-notify"] {
486 return
487 }
488
489 dc.conn.SendMessage(msg)
490}
491
492func (dc *downstreamConn) SendBatch(typ string, params []string, tags irc.Tags, f func(batchRef irc.TagValue)) {
493 dc.lastBatchRef++
494 ref := fmt.Sprintf("%v", dc.lastBatchRef)
495
496 if dc.caps["batch"] {
497 dc.SendMessage(&irc.Message{
498 Tags: tags,
499 Prefix: dc.srv.prefix(),
500 Command: "BATCH",
501 Params: append([]string{"+" + ref, typ}, params...),
502 })
503 }
504
505 f(irc.TagValue(ref))
506
507 if dc.caps["batch"] {
508 dc.SendMessage(&irc.Message{
509 Prefix: dc.srv.prefix(),
510 Command: "BATCH",
511 Params: []string{"-" + ref},
512 })
513 }
514}
515
516// sendMessageWithID sends an outgoing message with the specified internal ID.
517func (dc *downstreamConn) sendMessageWithID(msg *irc.Message, id string) {
518 dc.SendMessage(msg)
519
520 if id == "" || !dc.messageSupportsHistory(msg) {
521 return
522 }
523
524 dc.sendPing(id)
525}
526
527// advanceMessageWithID advances history to the specified message ID without
528// sending a message. This is useful e.g. for self-messages when echo-message
529// isn't enabled.
530func (dc *downstreamConn) advanceMessageWithID(msg *irc.Message, id string) {
531 if id == "" || !dc.messageSupportsHistory(msg) {
532 return
533 }
534
535 dc.sendPing(id)
536}
537
538// ackMsgID acknowledges that a message has been received.
539func (dc *downstreamConn) ackMsgID(id string) {
540 netID, entity, err := parseMsgID(id, nil)
541 if err != nil {
542 dc.logger.Printf("failed to ACK message ID %q: %v", id, err)
543 return
544 }
545
546 network := dc.user.getNetworkByID(netID)
547 if network == nil {
548 return
549 }
550
551 network.delivered.StoreID(entity, dc.clientName, id)
552}
553
554func (dc *downstreamConn) sendPing(msgID string) {
555 token := "soju-msgid-" + msgID
556 dc.SendMessage(&irc.Message{
557 Command: "PING",
558 Params: []string{token},
559 })
560}
561
562func (dc *downstreamConn) handlePong(token string) {
563 if !strings.HasPrefix(token, "soju-msgid-") {
564 dc.logger.Printf("received unrecognized PONG token %q", token)
565 return
566 }
567 msgID := strings.TrimPrefix(token, "soju-msgid-")
568 dc.ackMsgID(msgID)
569}
570
571// marshalMessage re-formats a message coming from an upstream connection so
572// that it's suitable for being sent on this downstream connection. Only
573// messages that may appear in logs are supported, except MODE.
574func (dc *downstreamConn) marshalMessage(msg *irc.Message, net *network) *irc.Message {
575 msg = msg.Copy()
576 msg.Prefix = dc.marshalUserPrefix(net, msg.Prefix)
577
578 switch msg.Command {
579 case "PRIVMSG", "NOTICE", "TAGMSG":
580 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
581 case "NICK":
582 // Nick change for another user
583 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
584 case "JOIN", "PART":
585 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
586 case "KICK":
587 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
588 msg.Params[1] = dc.marshalEntity(net, msg.Params[1])
589 case "TOPIC":
590 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
591 case "QUIT", "SETNAME":
592 // This space is intentionally left blank
593 default:
594 panic(fmt.Sprintf("unexpected %q message", msg.Command))
595 }
596
597 return msg
598}
599
600func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
601 switch msg.Command {
602 case "QUIT":
603 return dc.Close()
604 default:
605 if dc.registered {
606 return dc.handleMessageRegistered(msg)
607 } else {
608 return dc.handleMessageUnregistered(msg)
609 }
610 }
611}
612
613func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
614 switch msg.Command {
615 case "NICK":
616 var nick string
617 if err := parseMessageParams(msg, &nick); err != nil {
618 return err
619 }
620 if strings.ContainsAny(nick, illegalNickChars) {
621 return ircError{&irc.Message{
622 Command: irc.ERR_ERRONEUSNICKNAME,
623 Params: []string{dc.nick, nick, "contains illegal characters"},
624 }}
625 }
626 nickCM := casemapASCII(nick)
627 if nickCM == serviceNickCM {
628 return ircError{&irc.Message{
629 Command: irc.ERR_NICKNAMEINUSE,
630 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
631 }}
632 }
633 dc.nick = nick
634 dc.nickCM = nickCM
635 case "USER":
636 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
637 return err
638 }
639 case "PASS":
640 if err := parseMessageParams(msg, &dc.password); err != nil {
641 return err
642 }
643 case "CAP":
644 var subCmd string
645 if err := parseMessageParams(msg, &subCmd); err != nil {
646 return err
647 }
648 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
649 return err
650 }
651 case "AUTHENTICATE":
652 if !dc.caps["sasl"] {
653 return ircError{&irc.Message{
654 Command: irc.ERR_SASLFAIL,
655 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
656 }}
657 }
658 if len(msg.Params) == 0 {
659 return ircError{&irc.Message{
660 Command: irc.ERR_SASLFAIL,
661 Params: []string{"*", "Missing AUTHENTICATE argument"},
662 }}
663 }
664 if dc.nick == "" {
665 return ircError{&irc.Message{
666 Command: irc.ERR_SASLFAIL,
667 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
668 }}
669 }
670
671 var resp []byte
672 if msg.Params[0] == "*" {
673 dc.saslServer = nil
674 return ircError{&irc.Message{
675 Command: irc.ERR_SASLABORTED,
676 Params: []string{"*", "SASL authentication aborted"},
677 }}
678 } else if dc.saslServer == nil {
679 mech := strings.ToUpper(msg.Params[0])
680 switch mech {
681 case "PLAIN":
682 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
683 return dc.authenticate(username, password)
684 }))
685 default:
686 return ircError{&irc.Message{
687 Command: irc.ERR_SASLFAIL,
688 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
689 }}
690 }
691 } else if msg.Params[0] == "+" {
692 resp = nil
693 } else {
694 // TODO: multi-line messages
695 var err error
696 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
697 if err != nil {
698 dc.saslServer = nil
699 return ircError{&irc.Message{
700 Command: irc.ERR_SASLFAIL,
701 Params: []string{"*", "Invalid base64-encoded response"},
702 }}
703 }
704 }
705
706 challenge, done, err := dc.saslServer.Next(resp)
707 if err != nil {
708 dc.saslServer = nil
709 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
710 return ircError{&irc.Message{
711 Command: irc.ERR_SASLFAIL,
712 Params: []string{"*", ircErr.Message.Params[1]},
713 }}
714 }
715 dc.SendMessage(&irc.Message{
716 Prefix: dc.srv.prefix(),
717 Command: irc.ERR_SASLFAIL,
718 Params: []string{"*", "SASL error"},
719 })
720 return fmt.Errorf("SASL authentication failed: %v", err)
721 } else if done {
722 dc.saslServer = nil
723 dc.SendMessage(&irc.Message{
724 Prefix: dc.srv.prefix(),
725 Command: irc.RPL_LOGGEDIN,
726 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
727 })
728 dc.SendMessage(&irc.Message{
729 Prefix: dc.srv.prefix(),
730 Command: irc.RPL_SASLSUCCESS,
731 Params: []string{dc.nick, "SASL authentication successful"},
732 })
733 } else {
734 challengeStr := "+"
735 if len(challenge) > 0 {
736 challengeStr = base64.StdEncoding.EncodeToString(challenge)
737 }
738
739 // TODO: multi-line messages
740 dc.SendMessage(&irc.Message{
741 Prefix: dc.srv.prefix(),
742 Command: "AUTHENTICATE",
743 Params: []string{challengeStr},
744 })
745 }
746 case "BOUNCER":
747 var subcommand string
748 if err := parseMessageParams(msg, &subcommand); err != nil {
749 return err
750 }
751
752 switch strings.ToUpper(subcommand) {
753 case "BIND":
754 var idStr string
755 if err := parseMessageParams(msg, nil, &idStr); err != nil {
756 return err
757 }
758
759 if dc.user == nil {
760 return ircError{&irc.Message{
761 Command: "FAIL",
762 Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
763 }}
764 }
765
766 id, err := parseBouncerNetID(subcommand, idStr)
767 if err != nil {
768 return err
769 }
770
771 var match *network
772 dc.user.forEachNetwork(func(net *network) {
773 if net.ID == id {
774 match = net
775 }
776 })
777 if match == nil {
778 return ircError{&irc.Message{
779 Command: "FAIL",
780 Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
781 }}
782 }
783
784 dc.networkName = match.GetName()
785 }
786 default:
787 dc.logger.Printf("unhandled message: %v", msg)
788 return newUnknownCommandError(msg.Command)
789 }
790 if dc.rawUsername != "" && dc.nick != "" && !dc.negotiatingCaps {
791 return dc.register()
792 }
793 return nil
794}
795
796func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
797 cmd = strings.ToUpper(cmd)
798
799 replyTo := dc.nick
800 if !dc.registered {
801 replyTo = "*"
802 }
803
804 switch cmd {
805 case "LS":
806 if len(args) > 0 {
807 var err error
808 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
809 return err
810 }
811 }
812 if !dc.registered && dc.capVersion >= 302 {
813 // Let downstream show everything it supports, and trim
814 // down the available capabilities when upstreams are
815 // known.
816 for k, v := range needAllDownstreamCaps {
817 dc.supportedCaps[k] = v
818 }
819 }
820
821 caps := make([]string, 0, len(dc.supportedCaps))
822 for k, v := range dc.supportedCaps {
823 if dc.capVersion >= 302 && v != "" {
824 caps = append(caps, k+"="+v)
825 } else {
826 caps = append(caps, k)
827 }
828 }
829
830 // TODO: multi-line replies
831 dc.SendMessage(&irc.Message{
832 Prefix: dc.srv.prefix(),
833 Command: "CAP",
834 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
835 })
836
837 if dc.capVersion >= 302 {
838 // CAP version 302 implicitly enables cap-notify
839 dc.caps["cap-notify"] = true
840 }
841
842 if !dc.registered {
843 dc.negotiatingCaps = true
844 }
845 case "LIST":
846 var caps []string
847 for name, enabled := range dc.caps {
848 if enabled {
849 caps = append(caps, name)
850 }
851 }
852
853 // TODO: multi-line replies
854 dc.SendMessage(&irc.Message{
855 Prefix: dc.srv.prefix(),
856 Command: "CAP",
857 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
858 })
859 case "REQ":
860 if len(args) == 0 {
861 return ircError{&irc.Message{
862 Command: err_invalidcapcmd,
863 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
864 }}
865 }
866
867 // TODO: atomically ack/nak the whole capability set
868 caps := strings.Fields(args[0])
869 ack := true
870 for _, name := range caps {
871 name = strings.ToLower(name)
872 enable := !strings.HasPrefix(name, "-")
873 if !enable {
874 name = strings.TrimPrefix(name, "-")
875 }
876
877 if enable == dc.caps[name] {
878 continue
879 }
880
881 _, ok := dc.supportedCaps[name]
882 if !ok {
883 ack = false
884 break
885 }
886
887 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
888 // cap-notify cannot be disabled with CAP version 302
889 ack = false
890 break
891 }
892
893 dc.caps[name] = enable
894 }
895
896 reply := "NAK"
897 if ack {
898 reply = "ACK"
899 }
900 dc.SendMessage(&irc.Message{
901 Prefix: dc.srv.prefix(),
902 Command: "CAP",
903 Params: []string{replyTo, reply, args[0]},
904 })
905
906 if !dc.registered {
907 dc.negotiatingCaps = true
908 }
909 case "END":
910 dc.negotiatingCaps = false
911 default:
912 return ircError{&irc.Message{
913 Command: err_invalidcapcmd,
914 Params: []string{replyTo, cmd, "Unknown CAP command"},
915 }}
916 }
917 return nil
918}
919
920func (dc *downstreamConn) setSupportedCap(name, value string) {
921 prevValue, hasPrev := dc.supportedCaps[name]
922 changed := !hasPrev || prevValue != value
923 dc.supportedCaps[name] = value
924
925 if !dc.caps["cap-notify"] || !changed {
926 return
927 }
928
929 replyTo := dc.nick
930 if !dc.registered {
931 replyTo = "*"
932 }
933
934 cap := name
935 if value != "" && dc.capVersion >= 302 {
936 cap = name + "=" + value
937 }
938
939 dc.SendMessage(&irc.Message{
940 Prefix: dc.srv.prefix(),
941 Command: "CAP",
942 Params: []string{replyTo, "NEW", cap},
943 })
944}
945
946func (dc *downstreamConn) unsetSupportedCap(name string) {
947 _, hasPrev := dc.supportedCaps[name]
948 delete(dc.supportedCaps, name)
949 delete(dc.caps, name)
950
951 if !dc.caps["cap-notify"] || !hasPrev {
952 return
953 }
954
955 replyTo := dc.nick
956 if !dc.registered {
957 replyTo = "*"
958 }
959
960 dc.SendMessage(&irc.Message{
961 Prefix: dc.srv.prefix(),
962 Command: "CAP",
963 Params: []string{replyTo, "DEL", name},
964 })
965}
966
967func (dc *downstreamConn) updateSupportedCaps() {
968 supportedCaps := make(map[string]bool)
969 for cap := range needAllDownstreamCaps {
970 supportedCaps[cap] = true
971 }
972 dc.forEachUpstream(func(uc *upstreamConn) {
973 for cap, supported := range supportedCaps {
974 supportedCaps[cap] = supported && uc.caps[cap]
975 }
976 })
977
978 for cap, supported := range supportedCaps {
979 if supported {
980 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
981 } else {
982 dc.unsetSupportedCap(cap)
983 }
984 }
985}
986
987func (dc *downstreamConn) updateNick() {
988 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
989 dc.SendMessage(&irc.Message{
990 Prefix: dc.prefix(),
991 Command: "NICK",
992 Params: []string{uc.nick},
993 })
994 dc.nick = uc.nick
995 dc.nickCM = casemapASCII(dc.nick)
996 }
997}
998
999func (dc *downstreamConn) updateRealname() {
1000 if uc := dc.upstream(); uc != nil && uc.realname != dc.realname && dc.caps["setname"] {
1001 dc.SendMessage(&irc.Message{
1002 Prefix: dc.prefix(),
1003 Command: "SETNAME",
1004 Params: []string{uc.realname},
1005 })
1006 dc.realname = uc.realname
1007 }
1008}
1009
1010func sanityCheckServer(addr string) error {
1011 dialer := net.Dialer{Timeout: 30 * time.Second}
1012 conn, err := tls.DialWithDialer(&dialer, "tcp", addr, nil)
1013 if err != nil {
1014 return err
1015 }
1016 return conn.Close()
1017}
1018
1019func unmarshalUsername(rawUsername string) (username, client, network string) {
1020 username = rawUsername
1021
1022 i := strings.IndexAny(username, "/@")
1023 j := strings.LastIndexAny(username, "/@")
1024 if i >= 0 {
1025 username = rawUsername[:i]
1026 }
1027 if j >= 0 {
1028 if rawUsername[j] == '@' {
1029 client = rawUsername[j+1:]
1030 } else {
1031 network = rawUsername[j+1:]
1032 }
1033 }
1034 if i >= 0 && j >= 0 && i < j {
1035 if rawUsername[i] == '@' {
1036 client = rawUsername[i+1 : j]
1037 } else {
1038 network = rawUsername[i+1 : j]
1039 }
1040 }
1041
1042 return username, client, network
1043}
1044
1045func (dc *downstreamConn) authenticate(username, password string) error {
1046 username, clientName, networkName := unmarshalUsername(username)
1047
1048 u, err := dc.srv.db.GetUser(context.TODO(), username)
1049 if err != nil {
1050 dc.logger.Printf("failed authentication for %q: user not found: %v", username, err)
1051 return errAuthFailed
1052 }
1053
1054 // Password auth disabled
1055 if u.Password == "" {
1056 return errAuthFailed
1057 }
1058
1059 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
1060 if err != nil {
1061 dc.logger.Printf("failed authentication for %q: wrong password: %v", username, err)
1062 return errAuthFailed
1063 }
1064
1065 dc.user = dc.srv.getUser(username)
1066 if dc.user == nil {
1067 dc.logger.Printf("failed authentication for %q: user not active", username)
1068 return errAuthFailed
1069 }
1070 dc.clientName = clientName
1071 dc.networkName = networkName
1072 return nil
1073}
1074
1075func (dc *downstreamConn) register() error {
1076 if dc.registered {
1077 return fmt.Errorf("tried to register twice")
1078 }
1079
1080 password := dc.password
1081 dc.password = ""
1082 if dc.user == nil {
1083 if err := dc.authenticate(dc.rawUsername, password); err != nil {
1084 return err
1085 }
1086 }
1087
1088 if dc.clientName == "" && dc.networkName == "" {
1089 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
1090 }
1091
1092 dc.registered = true
1093 dc.logger.Printf("registration complete for user %q", dc.user.Username)
1094 return nil
1095}
1096
1097func (dc *downstreamConn) loadNetwork() error {
1098 if dc.networkName == "" {
1099 return nil
1100 }
1101
1102 network := dc.user.getNetwork(dc.networkName)
1103 if network == nil {
1104 addr := dc.networkName
1105 if !strings.ContainsRune(addr, ':') {
1106 addr = addr + ":6697"
1107 }
1108
1109 dc.logger.Printf("trying to connect to new network %q", addr)
1110 if err := sanityCheckServer(addr); err != nil {
1111 dc.logger.Printf("failed to connect to %q: %v", addr, err)
1112 return ircError{&irc.Message{
1113 Command: irc.ERR_PASSWDMISMATCH,
1114 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
1115 }}
1116 }
1117
1118 // Some clients only allow specifying the nickname (and use the
1119 // nickname as a username too). Strip the network name from the
1120 // nickname when auto-saving networks.
1121 nick, _, _ := unmarshalUsername(dc.nick)
1122
1123 dc.logger.Printf("auto-saving network %q", dc.networkName)
1124 var err error
1125 network, err = dc.user.createNetwork(&Network{
1126 Addr: dc.networkName,
1127 Nick: nick,
1128 Enabled: true,
1129 })
1130 if err != nil {
1131 return err
1132 }
1133 }
1134
1135 dc.network = network
1136 return nil
1137}
1138
1139func (dc *downstreamConn) welcome() error {
1140 if dc.user == nil || !dc.registered {
1141 panic("tried to welcome an unregistered connection")
1142 }
1143
1144 // TODO: doing this might take some time. We should do it in dc.register
1145 // instead, but we'll potentially be adding a new network and this must be
1146 // done in the user goroutine.
1147 if err := dc.loadNetwork(); err != nil {
1148 return err
1149 }
1150
1151 isupport := []string{
1152 fmt.Sprintf("CHATHISTORY=%v", dc.srv.HistoryLimit),
1153 "CASEMAPPING=ascii",
1154 }
1155
1156 if dc.network != nil {
1157 isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
1158 }
1159
1160 if uc := dc.upstream(); uc != nil {
1161 for k := range passthroughIsupport {
1162 v, ok := uc.isupport[k]
1163 if !ok {
1164 continue
1165 }
1166 if v != nil {
1167 isupport = append(isupport, fmt.Sprintf("%v=%v", k, *v))
1168 } else {
1169 isupport = append(isupport, k)
1170 }
1171 }
1172 }
1173
1174 dc.SendMessage(&irc.Message{
1175 Prefix: dc.srv.prefix(),
1176 Command: irc.RPL_WELCOME,
1177 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
1178 })
1179 dc.SendMessage(&irc.Message{
1180 Prefix: dc.srv.prefix(),
1181 Command: irc.RPL_YOURHOST,
1182 Params: []string{dc.nick, "Your host is " + dc.srv.Hostname},
1183 })
1184 dc.SendMessage(&irc.Message{
1185 Prefix: dc.srv.prefix(),
1186 Command: irc.RPL_MYINFO,
1187 Params: []string{dc.nick, dc.srv.Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
1188 })
1189 for _, msg := range generateIsupport(dc.srv.prefix(), dc.nick, isupport) {
1190 dc.SendMessage(msg)
1191 }
1192 if uc := dc.upstream(); uc != nil {
1193 dc.SendMessage(&irc.Message{
1194 Prefix: dc.srv.prefix(),
1195 Command: irc.RPL_UMODEIS,
1196 Params: []string{dc.nick, string(uc.modes)},
1197 })
1198 }
1199
1200 if motd := dc.user.srv.MOTD(); motd != "" && dc.network == nil {
1201 for _, msg := range generateMOTD(dc.srv.prefix(), dc.nick, motd) {
1202 dc.SendMessage(msg)
1203 }
1204 } else {
1205 motdHint := "No MOTD"
1206 if dc.network != nil {
1207 motdHint = "Use /motd to read the message of the day"
1208 }
1209 dc.SendMessage(&irc.Message{
1210 Prefix: dc.srv.prefix(),
1211 Command: irc.ERR_NOMOTD,
1212 Params: []string{dc.nick, motdHint},
1213 })
1214 }
1215
1216 dc.updateNick()
1217 dc.updateRealname()
1218 dc.updateSupportedCaps()
1219
1220 if dc.caps["soju.im/bouncer-networks-notify"] {
1221 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
1222 dc.user.forEachNetwork(func(network *network) {
1223 idStr := fmt.Sprintf("%v", network.ID)
1224 attrs := getNetworkAttrs(network)
1225 dc.SendMessage(&irc.Message{
1226 Tags: irc.Tags{"batch": batchRef},
1227 Prefix: dc.srv.prefix(),
1228 Command: "BOUNCER",
1229 Params: []string{"NETWORK", idStr, attrs.String()},
1230 })
1231 })
1232 })
1233 }
1234
1235 dc.forEachUpstream(func(uc *upstreamConn) {
1236 for _, entry := range uc.channels.innerMap {
1237 ch := entry.value.(*upstreamChannel)
1238 if !ch.complete {
1239 continue
1240 }
1241 record := uc.network.channels.Value(ch.Name)
1242 if record != nil && record.Detached {
1243 continue
1244 }
1245
1246 dc.SendMessage(&irc.Message{
1247 Prefix: dc.prefix(),
1248 Command: "JOIN",
1249 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
1250 })
1251
1252 forwardChannel(dc, ch)
1253 }
1254 })
1255
1256 dc.forEachNetwork(func(net *network) {
1257 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1258 return
1259 }
1260
1261 // Only send history if we're the first connected client with that name
1262 // for the network
1263 firstClient := true
1264 dc.user.forEachDownstream(func(c *downstreamConn) {
1265 if c != dc && c.clientName == dc.clientName && c.network == dc.network {
1266 firstClient = false
1267 }
1268 })
1269 if firstClient {
1270 net.delivered.ForEachTarget(func(target string) {
1271 lastDelivered := net.delivered.LoadID(target, dc.clientName)
1272 if lastDelivered == "" {
1273 return
1274 }
1275
1276 dc.sendTargetBacklog(net, target, lastDelivered)
1277
1278 // Fast-forward history to last message
1279 targetCM := net.casemap(target)
1280 lastID, err := dc.user.msgStore.LastMsgID(net, targetCM, time.Now())
1281 if err != nil {
1282 dc.logger.Printf("failed to get last message ID: %v", err)
1283 return
1284 }
1285 net.delivered.StoreID(target, dc.clientName, lastID)
1286 })
1287 }
1288 })
1289
1290 return nil
1291}
1292
1293// messageSupportsHistory checks whether the provided message can be sent as
1294// part of an history batch.
1295func (dc *downstreamConn) messageSupportsHistory(msg *irc.Message) bool {
1296 // Don't replay all messages, because that would mess up client
1297 // state. For instance we just sent the list of users, sending
1298 // PART messages for one of these users would be incorrect.
1299 // TODO: add support for draft/event-playback
1300 switch msg.Command {
1301 case "PRIVMSG", "NOTICE":
1302 return true
1303 }
1304 return false
1305}
1306
1307func (dc *downstreamConn) sendTargetBacklog(net *network, target, msgID string) {
1308 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1309 return
1310 }
1311
1312 ch := net.channels.Value(target)
1313
1314 limit := 4000
1315 targetCM := net.casemap(target)
1316 history, err := dc.user.msgStore.LoadLatestID(net, targetCM, msgID, limit)
1317 if err != nil {
1318 dc.logger.Printf("failed to send backlog for %q: %v", target, err)
1319 return
1320 }
1321
1322 dc.SendBatch("chathistory", []string{dc.marshalEntity(net, target)}, nil, func(batchRef irc.TagValue) {
1323 for _, msg := range history {
1324 if !dc.messageSupportsHistory(msg) {
1325 continue
1326 }
1327
1328 if ch != nil && ch.Detached {
1329 if net.detachedMessageNeedsRelay(ch, msg) {
1330 dc.relayDetachedMessage(net, msg)
1331 }
1332 } else {
1333 msg.Tags["batch"] = batchRef
1334 dc.SendMessage(dc.marshalMessage(msg, net))
1335 }
1336 }
1337 })
1338}
1339
1340func (dc *downstreamConn) relayDetachedMessage(net *network, msg *irc.Message) {
1341 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
1342 return
1343 }
1344
1345 sender := msg.Prefix.Name
1346 target, text := msg.Params[0], msg.Params[1]
1347 if net.isHighlight(msg) {
1348 sendServiceNOTICE(dc, fmt.Sprintf("highlight in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1349 } else {
1350 sendServiceNOTICE(dc, fmt.Sprintf("message in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1351 }
1352}
1353
1354func (dc *downstreamConn) runUntilRegistered() error {
1355 for !dc.registered {
1356 msg, err := dc.ReadMessage()
1357 if err != nil {
1358 return fmt.Errorf("failed to read IRC command: %w", err)
1359 }
1360
1361 err = dc.handleMessage(msg)
1362 if ircErr, ok := err.(ircError); ok {
1363 ircErr.Message.Prefix = dc.srv.prefix()
1364 dc.SendMessage(ircErr.Message)
1365 } else if err != nil {
1366 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
1367 }
1368 }
1369
1370 return nil
1371}
1372
1373func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
1374 switch msg.Command {
1375 case "CAP":
1376 var subCmd string
1377 if err := parseMessageParams(msg, &subCmd); err != nil {
1378 return err
1379 }
1380 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
1381 return err
1382 }
1383 case "PING":
1384 var source, destination string
1385 if err := parseMessageParams(msg, &source); err != nil {
1386 return err
1387 }
1388 if len(msg.Params) > 1 {
1389 destination = msg.Params[1]
1390 }
1391 if destination != "" && destination != dc.srv.Hostname {
1392 return ircError{&irc.Message{
1393 Command: irc.ERR_NOSUCHSERVER,
1394 Params: []string{dc.nick, destination, "No such server"},
1395 }}
1396 }
1397 dc.SendMessage(&irc.Message{
1398 Prefix: dc.srv.prefix(),
1399 Command: "PONG",
1400 Params: []string{dc.srv.Hostname, source},
1401 })
1402 return nil
1403 case "PONG":
1404 if len(msg.Params) == 0 {
1405 return newNeedMoreParamsError(msg.Command)
1406 }
1407 token := msg.Params[len(msg.Params)-1]
1408 dc.handlePong(token)
1409 case "USER":
1410 return ircError{&irc.Message{
1411 Command: irc.ERR_ALREADYREGISTERED,
1412 Params: []string{dc.nick, "You may not reregister"},
1413 }}
1414 case "NICK":
1415 var rawNick string
1416 if err := parseMessageParams(msg, &rawNick); err != nil {
1417 return err
1418 }
1419
1420 nick := rawNick
1421 var upstream *upstreamConn
1422 if dc.upstream() == nil {
1423 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
1424 if err == nil { // NICK nick/network: NICK only on a specific upstream
1425 upstream = uc
1426 nick = unmarshaledNick
1427 }
1428 }
1429
1430 if strings.ContainsAny(nick, illegalNickChars) {
1431 return ircError{&irc.Message{
1432 Command: irc.ERR_ERRONEUSNICKNAME,
1433 Params: []string{dc.nick, rawNick, "contains illegal characters"},
1434 }}
1435 }
1436 if casemapASCII(nick) == serviceNickCM {
1437 return ircError{&irc.Message{
1438 Command: irc.ERR_NICKNAMEINUSE,
1439 Params: []string{dc.nick, rawNick, "Nickname reserved for bouncer service"},
1440 }}
1441 }
1442
1443 var err error
1444 dc.forEachNetwork(func(n *network) {
1445 if err != nil || (upstream != nil && upstream.network != n) {
1446 return
1447 }
1448 n.Nick = nick
1449 err = dc.srv.db.StoreNetwork(context.TODO(), dc.user.ID, &n.Network)
1450 })
1451 if err != nil {
1452 return err
1453 }
1454
1455 dc.forEachUpstream(func(uc *upstreamConn) {
1456 if upstream != nil && upstream != uc {
1457 return
1458 }
1459 uc.SendMessageLabeled(dc.id, &irc.Message{
1460 Command: "NICK",
1461 Params: []string{nick},
1462 })
1463 })
1464
1465 if dc.upstream() == nil && upstream == nil && dc.nick != nick {
1466 dc.SendMessage(&irc.Message{
1467 Prefix: dc.prefix(),
1468 Command: "NICK",
1469 Params: []string{nick},
1470 })
1471 dc.nick = nick
1472 dc.nickCM = casemapASCII(dc.nick)
1473 }
1474 case "SETNAME":
1475 var realname string
1476 if err := parseMessageParams(msg, &realname); err != nil {
1477 return err
1478 }
1479
1480 // If the client just resets to the default, just wipe the per-network
1481 // preference
1482 storeRealname := realname
1483 if realname == dc.user.Realname {
1484 storeRealname = ""
1485 }
1486
1487 var storeErr error
1488 var needUpdate []Network
1489 dc.forEachNetwork(func(n *network) {
1490 // We only need to call updateNetwork for upstreams that don't
1491 // support setname
1492 if uc := n.conn; uc != nil && uc.caps["setname"] {
1493 uc.SendMessageLabeled(dc.id, &irc.Message{
1494 Command: "SETNAME",
1495 Params: []string{realname},
1496 })
1497
1498 n.Realname = storeRealname
1499 if err := dc.srv.db.StoreNetwork(context.TODO(), dc.user.ID, &n.Network); err != nil {
1500 dc.logger.Printf("failed to store network realname: %v", err)
1501 storeErr = err
1502 }
1503 return
1504 }
1505
1506 record := n.Network // copy network record because we'll mutate it
1507 record.Realname = storeRealname
1508 needUpdate = append(needUpdate, record)
1509 })
1510
1511 // Walk the network list as a second step, because updateNetwork
1512 // mutates the original list
1513 for _, record := range needUpdate {
1514 if _, err := dc.user.updateNetwork(&record); err != nil {
1515 dc.logger.Printf("failed to update network realname: %v", err)
1516 storeErr = err
1517 }
1518 }
1519 if storeErr != nil {
1520 return ircError{&irc.Message{
1521 Command: "FAIL",
1522 Params: []string{"SETNAME", "CANNOT_CHANGE_REALNAME", "Failed to update realname"},
1523 }}
1524 }
1525
1526 if dc.upstream() == nil {
1527 dc.SendMessage(&irc.Message{
1528 Prefix: dc.prefix(),
1529 Command: "SETNAME",
1530 Params: []string{realname},
1531 })
1532 }
1533 case "JOIN":
1534 var namesStr string
1535 if err := parseMessageParams(msg, &namesStr); err != nil {
1536 return err
1537 }
1538
1539 var keys []string
1540 if len(msg.Params) > 1 {
1541 keys = strings.Split(msg.Params[1], ",")
1542 }
1543
1544 for i, name := range strings.Split(namesStr, ",") {
1545 uc, upstreamName, err := dc.unmarshalEntity(name)
1546 if err != nil {
1547 return err
1548 }
1549
1550 var key string
1551 if len(keys) > i {
1552 key = keys[i]
1553 }
1554
1555 if !uc.isChannel(upstreamName) {
1556 dc.SendMessage(&irc.Message{
1557 Prefix: dc.srv.prefix(),
1558 Command: irc.ERR_NOSUCHCHANNEL,
1559 Params: []string{name, "Not a channel name"},
1560 })
1561 continue
1562 }
1563
1564 params := []string{upstreamName}
1565 if key != "" {
1566 params = append(params, key)
1567 }
1568 uc.SendMessageLabeled(dc.id, &irc.Message{
1569 Command: "JOIN",
1570 Params: params,
1571 })
1572
1573 ch := uc.network.channels.Value(upstreamName)
1574 if ch != nil {
1575 // Don't clear the channel key if there's one set
1576 // TODO: add a way to unset the channel key
1577 if key != "" {
1578 ch.Key = key
1579 }
1580 uc.network.attach(ch)
1581 } else {
1582 ch = &Channel{
1583 Name: upstreamName,
1584 Key: key,
1585 }
1586 uc.network.channels.SetValue(upstreamName, ch)
1587 }
1588 if err := dc.srv.db.StoreChannel(context.TODO(), uc.network.ID, ch); err != nil {
1589 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1590 }
1591 }
1592 case "PART":
1593 var namesStr string
1594 if err := parseMessageParams(msg, &namesStr); err != nil {
1595 return err
1596 }
1597
1598 var reason string
1599 if len(msg.Params) > 1 {
1600 reason = msg.Params[1]
1601 }
1602
1603 for _, name := range strings.Split(namesStr, ",") {
1604 uc, upstreamName, err := dc.unmarshalEntity(name)
1605 if err != nil {
1606 return err
1607 }
1608
1609 if strings.EqualFold(reason, "detach") {
1610 ch := uc.network.channels.Value(upstreamName)
1611 if ch != nil {
1612 uc.network.detach(ch)
1613 } else {
1614 ch = &Channel{
1615 Name: name,
1616 Detached: true,
1617 }
1618 uc.network.channels.SetValue(upstreamName, ch)
1619 }
1620 if err := dc.srv.db.StoreChannel(context.TODO(), uc.network.ID, ch); err != nil {
1621 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1622 }
1623 } else {
1624 params := []string{upstreamName}
1625 if reason != "" {
1626 params = append(params, reason)
1627 }
1628 uc.SendMessageLabeled(dc.id, &irc.Message{
1629 Command: "PART",
1630 Params: params,
1631 })
1632
1633 if err := uc.network.deleteChannel(upstreamName); err != nil {
1634 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1635 }
1636 }
1637 }
1638 case "KICK":
1639 var channelStr, userStr string
1640 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1641 return err
1642 }
1643
1644 channels := strings.Split(channelStr, ",")
1645 users := strings.Split(userStr, ",")
1646
1647 var reason string
1648 if len(msg.Params) > 2 {
1649 reason = msg.Params[2]
1650 }
1651
1652 if len(channels) != 1 && len(channels) != len(users) {
1653 return ircError{&irc.Message{
1654 Command: irc.ERR_BADCHANMASK,
1655 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1656 }}
1657 }
1658
1659 for i, user := range users {
1660 var channel string
1661 if len(channels) == 1 {
1662 channel = channels[0]
1663 } else {
1664 channel = channels[i]
1665 }
1666
1667 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1668 if err != nil {
1669 return err
1670 }
1671
1672 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1673 if err != nil {
1674 return err
1675 }
1676
1677 if ucChannel != ucUser {
1678 return ircError{&irc.Message{
1679 Command: irc.ERR_USERNOTINCHANNEL,
1680 Params: []string{dc.nick, user, channel, "They are on another network"},
1681 }}
1682 }
1683 uc := ucChannel
1684
1685 params := []string{upstreamChannel, upstreamUser}
1686 if reason != "" {
1687 params = append(params, reason)
1688 }
1689 uc.SendMessageLabeled(dc.id, &irc.Message{
1690 Command: "KICK",
1691 Params: params,
1692 })
1693 }
1694 case "MODE":
1695 var name string
1696 if err := parseMessageParams(msg, &name); err != nil {
1697 return err
1698 }
1699
1700 var modeStr string
1701 if len(msg.Params) > 1 {
1702 modeStr = msg.Params[1]
1703 }
1704
1705 if casemapASCII(name) == dc.nickCM {
1706 if modeStr != "" {
1707 if uc := dc.upstream(); uc != nil {
1708 uc.SendMessageLabeled(dc.id, &irc.Message{
1709 Command: "MODE",
1710 Params: []string{uc.nick, modeStr},
1711 })
1712 } else {
1713 dc.SendMessage(&irc.Message{
1714 Prefix: dc.srv.prefix(),
1715 Command: irc.ERR_UMODEUNKNOWNFLAG,
1716 Params: []string{dc.nick, "Cannot change user mode in multi-upstream mode"},
1717 })
1718 }
1719 } else {
1720 var userMode string
1721 if uc := dc.upstream(); uc != nil {
1722 userMode = string(uc.modes)
1723 }
1724
1725 dc.SendMessage(&irc.Message{
1726 Prefix: dc.srv.prefix(),
1727 Command: irc.RPL_UMODEIS,
1728 Params: []string{dc.nick, userMode},
1729 })
1730 }
1731 return nil
1732 }
1733
1734 uc, upstreamName, err := dc.unmarshalEntity(name)
1735 if err != nil {
1736 return err
1737 }
1738
1739 if !uc.isChannel(upstreamName) {
1740 return ircError{&irc.Message{
1741 Command: irc.ERR_USERSDONTMATCH,
1742 Params: []string{dc.nick, "Cannot change mode for other users"},
1743 }}
1744 }
1745
1746 if modeStr != "" {
1747 params := []string{upstreamName, modeStr}
1748 params = append(params, msg.Params[2:]...)
1749 uc.SendMessageLabeled(dc.id, &irc.Message{
1750 Command: "MODE",
1751 Params: params,
1752 })
1753 } else {
1754 ch := uc.channels.Value(upstreamName)
1755 if ch == nil {
1756 return ircError{&irc.Message{
1757 Command: irc.ERR_NOSUCHCHANNEL,
1758 Params: []string{dc.nick, name, "No such channel"},
1759 }}
1760 }
1761
1762 if ch.modes == nil {
1763 // we haven't received the initial RPL_CHANNELMODEIS yet
1764 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1765 return nil
1766 }
1767
1768 modeStr, modeParams := ch.modes.Format()
1769 params := []string{dc.nick, name, modeStr}
1770 params = append(params, modeParams...)
1771
1772 dc.SendMessage(&irc.Message{
1773 Prefix: dc.srv.prefix(),
1774 Command: irc.RPL_CHANNELMODEIS,
1775 Params: params,
1776 })
1777 if ch.creationTime != "" {
1778 dc.SendMessage(&irc.Message{
1779 Prefix: dc.srv.prefix(),
1780 Command: rpl_creationtime,
1781 Params: []string{dc.nick, name, ch.creationTime},
1782 })
1783 }
1784 }
1785 case "TOPIC":
1786 var channel string
1787 if err := parseMessageParams(msg, &channel); err != nil {
1788 return err
1789 }
1790
1791 uc, upstreamName, err := dc.unmarshalEntity(channel)
1792 if err != nil {
1793 return err
1794 }
1795
1796 if len(msg.Params) > 1 { // setting topic
1797 topic := msg.Params[1]
1798 uc.SendMessageLabeled(dc.id, &irc.Message{
1799 Command: "TOPIC",
1800 Params: []string{upstreamName, topic},
1801 })
1802 } else { // getting topic
1803 ch := uc.channels.Value(upstreamName)
1804 if ch == nil {
1805 return ircError{&irc.Message{
1806 Command: irc.ERR_NOSUCHCHANNEL,
1807 Params: []string{dc.nick, upstreamName, "No such channel"},
1808 }}
1809 }
1810 sendTopic(dc, ch)
1811 }
1812 case "LIST":
1813 // TODO: support ELIST when supported by all upstreams
1814
1815 pl := pendingLIST{
1816 downstreamID: dc.id,
1817 pendingCommands: make(map[int64]*irc.Message),
1818 }
1819 var upstream *upstreamConn
1820 var upstreamChannels map[int64][]string
1821 if len(msg.Params) > 0 {
1822 uc, upstreamMask, err := dc.unmarshalEntity(msg.Params[0])
1823 if err == nil && upstreamMask == "*" { // LIST */network: send LIST only to one network
1824 upstream = uc
1825 } else {
1826 upstreamChannels = make(map[int64][]string)
1827 channels := strings.Split(msg.Params[0], ",")
1828 for _, channel := range channels {
1829 uc, upstreamChannel, err := dc.unmarshalEntity(channel)
1830 if err != nil {
1831 return err
1832 }
1833 upstreamChannels[uc.network.ID] = append(upstreamChannels[uc.network.ID], upstreamChannel)
1834 }
1835 }
1836 }
1837
1838 dc.user.pendingLISTs = append(dc.user.pendingLISTs, pl)
1839 dc.forEachUpstream(func(uc *upstreamConn) {
1840 if upstream != nil && upstream != uc {
1841 return
1842 }
1843 var params []string
1844 if upstreamChannels != nil {
1845 if channels, ok := upstreamChannels[uc.network.ID]; ok {
1846 params = []string{strings.Join(channels, ",")}
1847 } else {
1848 return
1849 }
1850 }
1851 pl.pendingCommands[uc.network.ID] = &irc.Message{
1852 Command: "LIST",
1853 Params: params,
1854 }
1855 uc.trySendLIST(dc.id)
1856 })
1857 case "NAMES":
1858 if len(msg.Params) == 0 {
1859 dc.SendMessage(&irc.Message{
1860 Prefix: dc.srv.prefix(),
1861 Command: irc.RPL_ENDOFNAMES,
1862 Params: []string{dc.nick, "*", "End of /NAMES list"},
1863 })
1864 return nil
1865 }
1866
1867 channels := strings.Split(msg.Params[0], ",")
1868 for _, channel := range channels {
1869 uc, upstreamName, err := dc.unmarshalEntity(channel)
1870 if err != nil {
1871 return err
1872 }
1873
1874 ch := uc.channels.Value(upstreamName)
1875 if ch != nil {
1876 sendNames(dc, ch)
1877 } else {
1878 // NAMES on a channel we have not joined, ask upstream
1879 uc.SendMessageLabeled(dc.id, &irc.Message{
1880 Command: "NAMES",
1881 Params: []string{upstreamName},
1882 })
1883 }
1884 }
1885 case "WHO":
1886 if len(msg.Params) == 0 {
1887 // TODO: support WHO without parameters
1888 dc.SendMessage(&irc.Message{
1889 Prefix: dc.srv.prefix(),
1890 Command: irc.RPL_ENDOFWHO,
1891 Params: []string{dc.nick, "*", "End of /WHO list"},
1892 })
1893 return nil
1894 }
1895
1896 // TODO: support WHO masks
1897 entity := msg.Params[0]
1898 entityCM := casemapASCII(entity)
1899
1900 if dc.network == nil && entityCM == dc.nickCM {
1901 // TODO: support AWAY (H/G) in self WHO reply
1902 flags := "H"
1903 if dc.user.Admin {
1904 flags += "*"
1905 }
1906 dc.SendMessage(&irc.Message{
1907 Prefix: dc.srv.prefix(),
1908 Command: irc.RPL_WHOREPLY,
1909 Params: []string{dc.nick, "*", dc.user.Username, dc.hostname, dc.srv.Hostname, dc.nick, flags, "0 " + dc.realname},
1910 })
1911 dc.SendMessage(&irc.Message{
1912 Prefix: dc.srv.prefix(),
1913 Command: irc.RPL_ENDOFWHO,
1914 Params: []string{dc.nick, dc.nick, "End of /WHO list"},
1915 })
1916 return nil
1917 }
1918 if entityCM == serviceNickCM {
1919 dc.SendMessage(&irc.Message{
1920 Prefix: dc.srv.prefix(),
1921 Command: irc.RPL_WHOREPLY,
1922 Params: []string{serviceNick, "*", servicePrefix.User, servicePrefix.Host, dc.srv.Hostname, serviceNick, "H*", "0 " + serviceRealname},
1923 })
1924 dc.SendMessage(&irc.Message{
1925 Prefix: dc.srv.prefix(),
1926 Command: irc.RPL_ENDOFWHO,
1927 Params: []string{dc.nick, serviceNick, "End of /WHO list"},
1928 })
1929 return nil
1930 }
1931
1932 uc, upstreamName, err := dc.unmarshalEntity(entity)
1933 if err != nil {
1934 return err
1935 }
1936
1937 var params []string
1938 if len(msg.Params) == 2 {
1939 params = []string{upstreamName, msg.Params[1]}
1940 } else {
1941 params = []string{upstreamName}
1942 }
1943
1944 uc.SendMessageLabeled(dc.id, &irc.Message{
1945 Command: "WHO",
1946 Params: params,
1947 })
1948 case "WHOIS":
1949 if len(msg.Params) == 0 {
1950 return ircError{&irc.Message{
1951 Command: irc.ERR_NONICKNAMEGIVEN,
1952 Params: []string{dc.nick, "No nickname given"},
1953 }}
1954 }
1955
1956 var target, mask string
1957 if len(msg.Params) == 1 {
1958 target = ""
1959 mask = msg.Params[0]
1960 } else {
1961 target = msg.Params[0]
1962 mask = msg.Params[1]
1963 }
1964 // TODO: support multiple WHOIS users
1965 if i := strings.IndexByte(mask, ','); i >= 0 {
1966 mask = mask[:i]
1967 }
1968
1969 if dc.network == nil && casemapASCII(mask) == dc.nickCM {
1970 dc.SendMessage(&irc.Message{
1971 Prefix: dc.srv.prefix(),
1972 Command: irc.RPL_WHOISUSER,
1973 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
1974 })
1975 dc.SendMessage(&irc.Message{
1976 Prefix: dc.srv.prefix(),
1977 Command: irc.RPL_WHOISSERVER,
1978 Params: []string{dc.nick, dc.nick, dc.srv.Hostname, "soju"},
1979 })
1980 if dc.user.Admin {
1981 dc.SendMessage(&irc.Message{
1982 Prefix: dc.srv.prefix(),
1983 Command: irc.RPL_WHOISOPERATOR,
1984 Params: []string{dc.nick, dc.nick, "is a bouncer administrator"},
1985 })
1986 }
1987 dc.SendMessage(&irc.Message{
1988 Prefix: dc.srv.prefix(),
1989 Command: irc.RPL_ENDOFWHOIS,
1990 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
1991 })
1992 return nil
1993 }
1994 if casemapASCII(mask) == serviceNickCM {
1995 dc.SendMessage(&irc.Message{
1996 Prefix: dc.srv.prefix(),
1997 Command: irc.RPL_WHOISUSER,
1998 Params: []string{dc.nick, serviceNick, servicePrefix.User, servicePrefix.Host, "*", serviceRealname},
1999 })
2000 dc.SendMessage(&irc.Message{
2001 Prefix: dc.srv.prefix(),
2002 Command: irc.RPL_WHOISSERVER,
2003 Params: []string{dc.nick, serviceNick, dc.srv.Hostname, "soju"},
2004 })
2005 dc.SendMessage(&irc.Message{
2006 Prefix: dc.srv.prefix(),
2007 Command: irc.RPL_WHOISOPERATOR,
2008 Params: []string{dc.nick, serviceNick, "is the bouncer service"},
2009 })
2010 dc.SendMessage(&irc.Message{
2011 Prefix: dc.srv.prefix(),
2012 Command: irc.RPL_ENDOFWHOIS,
2013 Params: []string{dc.nick, serviceNick, "End of /WHOIS list"},
2014 })
2015 return nil
2016 }
2017
2018 // TODO: support WHOIS masks
2019 uc, upstreamNick, err := dc.unmarshalEntity(mask)
2020 if err != nil {
2021 return err
2022 }
2023
2024 var params []string
2025 if target != "" {
2026 if target == mask { // WHOIS nick nick
2027 params = []string{upstreamNick, upstreamNick}
2028 } else {
2029 params = []string{target, upstreamNick}
2030 }
2031 } else {
2032 params = []string{upstreamNick}
2033 }
2034
2035 uc.SendMessageLabeled(dc.id, &irc.Message{
2036 Command: "WHOIS",
2037 Params: params,
2038 })
2039 case "PRIVMSG", "NOTICE":
2040 var targetsStr, text string
2041 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
2042 return err
2043 }
2044 tags := copyClientTags(msg.Tags)
2045
2046 for _, name := range strings.Split(targetsStr, ",") {
2047 if name == "$"+dc.srv.Hostname || (name == "$*" && dc.network == nil) {
2048 // "$" means a server mask follows. If it's the bouncer's
2049 // hostname, broadcast the message to all bouncer users.
2050 if !dc.user.Admin {
2051 return ircError{&irc.Message{
2052 Prefix: dc.srv.prefix(),
2053 Command: irc.ERR_BADMASK,
2054 Params: []string{dc.nick, name, "Permission denied to broadcast message to all bouncer users"},
2055 }}
2056 }
2057
2058 dc.logger.Printf("broadcasting bouncer-wide %v: %v", msg.Command, text)
2059
2060 broadcastTags := tags.Copy()
2061 broadcastTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2062 broadcastMsg := &irc.Message{
2063 Tags: broadcastTags,
2064 Prefix: servicePrefix,
2065 Command: msg.Command,
2066 Params: []string{name, text},
2067 }
2068 dc.srv.forEachUser(func(u *user) {
2069 u.events <- eventBroadcast{broadcastMsg}
2070 })
2071 continue
2072 }
2073
2074 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2075 dc.SendMessage(&irc.Message{
2076 Tags: msg.Tags.Copy(),
2077 Prefix: dc.prefix(),
2078 Command: msg.Command,
2079 Params: []string{name, text},
2080 })
2081 continue
2082 }
2083
2084 if msg.Command == "PRIVMSG" && casemapASCII(name) == serviceNickCM {
2085 if dc.caps["echo-message"] {
2086 echoTags := tags.Copy()
2087 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2088 dc.SendMessage(&irc.Message{
2089 Tags: echoTags,
2090 Prefix: dc.prefix(),
2091 Command: msg.Command,
2092 Params: []string{name, text},
2093 })
2094 }
2095 handleServicePRIVMSG(dc, text)
2096 continue
2097 }
2098
2099 uc, upstreamName, err := dc.unmarshalEntity(name)
2100 if err != nil {
2101 return err
2102 }
2103
2104 if msg.Command == "PRIVMSG" && uc.network.casemap(upstreamName) == "nickserv" {
2105 dc.handleNickServPRIVMSG(uc, text)
2106 }
2107
2108 unmarshaledText := text
2109 if uc.isChannel(upstreamName) {
2110 unmarshaledText = dc.unmarshalText(uc, text)
2111 }
2112 uc.SendMessageLabeled(dc.id, &irc.Message{
2113 Tags: tags,
2114 Command: msg.Command,
2115 Params: []string{upstreamName, unmarshaledText},
2116 })
2117
2118 echoTags := tags.Copy()
2119 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2120 if uc.account != "" {
2121 echoTags["account"] = irc.TagValue(uc.account)
2122 }
2123 echoMsg := &irc.Message{
2124 Tags: echoTags,
2125 Prefix: &irc.Prefix{
2126 Name: uc.nick,
2127 User: uc.username,
2128 },
2129 Command: msg.Command,
2130 Params: []string{upstreamName, text},
2131 }
2132 uc.produce(upstreamName, echoMsg, dc)
2133
2134 uc.updateChannelAutoDetach(upstreamName)
2135 }
2136 case "TAGMSG":
2137 var targetsStr string
2138 if err := parseMessageParams(msg, &targetsStr); err != nil {
2139 return err
2140 }
2141 tags := copyClientTags(msg.Tags)
2142
2143 for _, name := range strings.Split(targetsStr, ",") {
2144 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2145 dc.SendMessage(&irc.Message{
2146 Tags: msg.Tags.Copy(),
2147 Prefix: dc.prefix(),
2148 Command: "TAGMSG",
2149 Params: []string{name},
2150 })
2151 continue
2152 }
2153
2154 if casemapASCII(name) == serviceNickCM {
2155 continue
2156 }
2157
2158 uc, upstreamName, err := dc.unmarshalEntity(name)
2159 if err != nil {
2160 return err
2161 }
2162 if _, ok := uc.caps["message-tags"]; !ok {
2163 continue
2164 }
2165
2166 uc.SendMessageLabeled(dc.id, &irc.Message{
2167 Tags: tags,
2168 Command: "TAGMSG",
2169 Params: []string{upstreamName},
2170 })
2171
2172 uc.updateChannelAutoDetach(upstreamName)
2173 }
2174 case "INVITE":
2175 var user, channel string
2176 if err := parseMessageParams(msg, &user, &channel); err != nil {
2177 return err
2178 }
2179
2180 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
2181 if err != nil {
2182 return err
2183 }
2184
2185 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
2186 if err != nil {
2187 return err
2188 }
2189
2190 if ucChannel != ucUser {
2191 return ircError{&irc.Message{
2192 Command: irc.ERR_USERNOTINCHANNEL,
2193 Params: []string{dc.nick, user, channel, "They are on another network"},
2194 }}
2195 }
2196 uc := ucChannel
2197
2198 uc.SendMessageLabeled(dc.id, &irc.Message{
2199 Command: "INVITE",
2200 Params: []string{upstreamUser, upstreamChannel},
2201 })
2202 case "CHATHISTORY":
2203 var subcommand string
2204 if err := parseMessageParams(msg, &subcommand); err != nil {
2205 return err
2206 }
2207 var target, limitStr string
2208 var boundsStr [2]string
2209 switch subcommand {
2210 case "AFTER", "BEFORE":
2211 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &limitStr); err != nil {
2212 return err
2213 }
2214 case "BETWEEN":
2215 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2216 return err
2217 }
2218 case "TARGETS":
2219 if err := parseMessageParams(msg, nil, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2220 return err
2221 }
2222 default:
2223 // TODO: support LATEST, AROUND
2224 return ircError{&irc.Message{
2225 Command: "FAIL",
2226 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, "Unknown command"},
2227 }}
2228 }
2229
2230 // We don't save history for our service
2231 if casemapASCII(target) == serviceNickCM {
2232 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {})
2233 return nil
2234 }
2235
2236 store, ok := dc.user.msgStore.(chatHistoryMessageStore)
2237 if !ok {
2238 return ircError{&irc.Message{
2239 Command: irc.ERR_UNKNOWNCOMMAND,
2240 Params: []string{dc.nick, "CHATHISTORY", "Unknown command"},
2241 }}
2242 }
2243
2244 network, entity, err := dc.unmarshalEntityNetwork(target)
2245 if err != nil {
2246 return err
2247 }
2248 entity = network.casemap(entity)
2249
2250 // TODO: support msgid criteria
2251 var bounds [2]time.Time
2252 bounds[0] = parseChatHistoryBound(boundsStr[0])
2253 if bounds[0].IsZero() {
2254 return ircError{&irc.Message{
2255 Command: "FAIL",
2256 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[0], "Invalid first bound"},
2257 }}
2258 }
2259
2260 if boundsStr[1] != "" {
2261 bounds[1] = parseChatHistoryBound(boundsStr[1])
2262 if bounds[1].IsZero() {
2263 return ircError{&irc.Message{
2264 Command: "FAIL",
2265 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[1], "Invalid second bound"},
2266 }}
2267 }
2268 }
2269
2270 limit, err := strconv.Atoi(limitStr)
2271 if err != nil || limit < 0 || limit > dc.srv.HistoryLimit {
2272 return ircError{&irc.Message{
2273 Command: "FAIL",
2274 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, limitStr, "Invalid limit"},
2275 }}
2276 }
2277
2278 var history []*irc.Message
2279 switch subcommand {
2280 case "BEFORE":
2281 history, err = store.LoadBeforeTime(network, entity, bounds[0], time.Time{}, limit)
2282 case "AFTER":
2283 history, err = store.LoadAfterTime(network, entity, bounds[0], time.Now(), limit)
2284 case "BETWEEN":
2285 if bounds[0].Before(bounds[1]) {
2286 history, err = store.LoadAfterTime(network, entity, bounds[0], bounds[1], limit)
2287 } else {
2288 history, err = store.LoadBeforeTime(network, entity, bounds[0], bounds[1], limit)
2289 }
2290 case "TARGETS":
2291 // TODO: support TARGETS in multi-upstream mode
2292 targets, err := store.ListTargets(network, bounds[0], bounds[1], limit)
2293 if err != nil {
2294 dc.logger.Printf("failed fetching targets for chathistory: %v", err)
2295 return ircError{&irc.Message{
2296 Command: "FAIL",
2297 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, "Failed to retrieve targets"},
2298 }}
2299 }
2300
2301 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {
2302 for _, target := range targets {
2303 if ch := network.channels.Value(target.Name); ch != nil && ch.Detached {
2304 continue
2305 }
2306
2307 dc.SendMessage(&irc.Message{
2308 Tags: irc.Tags{"batch": batchRef},
2309 Prefix: dc.srv.prefix(),
2310 Command: "CHATHISTORY",
2311 Params: []string{"TARGETS", target.Name, target.LatestMessage.UTC().Format(serverTimeLayout)},
2312 })
2313 }
2314 })
2315
2316 return nil
2317 }
2318 if err != nil {
2319 dc.logger.Printf("failed fetching %q messages for chathistory: %v", target, err)
2320 return newChatHistoryError(subcommand, target)
2321 }
2322
2323 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {
2324 for _, msg := range history {
2325 msg.Tags["batch"] = batchRef
2326 dc.SendMessage(dc.marshalMessage(msg, network))
2327 }
2328 })
2329 case "BOUNCER":
2330 var subcommand string
2331 if err := parseMessageParams(msg, &subcommand); err != nil {
2332 return err
2333 }
2334
2335 switch strings.ToUpper(subcommand) {
2336 case "BIND":
2337 return ircError{&irc.Message{
2338 Command: "FAIL",
2339 Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind to a network after registration"},
2340 }}
2341 case "LISTNETWORKS":
2342 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
2343 dc.user.forEachNetwork(func(network *network) {
2344 idStr := fmt.Sprintf("%v", network.ID)
2345 attrs := getNetworkAttrs(network)
2346 dc.SendMessage(&irc.Message{
2347 Tags: irc.Tags{"batch": batchRef},
2348 Prefix: dc.srv.prefix(),
2349 Command: "BOUNCER",
2350 Params: []string{"NETWORK", idStr, attrs.String()},
2351 })
2352 })
2353 })
2354 case "ADDNETWORK":
2355 var attrsStr string
2356 if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
2357 return err
2358 }
2359 attrs := irc.ParseTags(attrsStr)
2360
2361 record := &Network{Nick: dc.nick, Enabled: true}
2362 if err := updateNetworkAttrs(record, attrs, subcommand); err != nil {
2363 return err
2364 }
2365
2366 if record.Realname == dc.user.Realname {
2367 record.Realname = ""
2368 }
2369
2370 network, err := dc.user.createNetwork(record)
2371 if err != nil {
2372 return ircError{&irc.Message{
2373 Command: "FAIL",
2374 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
2375 }}
2376 }
2377
2378 dc.SendMessage(&irc.Message{
2379 Prefix: dc.srv.prefix(),
2380 Command: "BOUNCER",
2381 Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
2382 })
2383 case "CHANGENETWORK":
2384 var idStr, attrsStr string
2385 if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
2386 return err
2387 }
2388 id, err := parseBouncerNetID(subcommand, idStr)
2389 if err != nil {
2390 return err
2391 }
2392 attrs := irc.ParseTags(attrsStr)
2393
2394 net := dc.user.getNetworkByID(id)
2395 if net == nil {
2396 return ircError{&irc.Message{
2397 Command: "FAIL",
2398 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2399 }}
2400 }
2401
2402 record := net.Network // copy network record because we'll mutate it
2403 if err := updateNetworkAttrs(&record, attrs, subcommand); err != nil {
2404 return err
2405 }
2406
2407 if record.Realname == dc.user.Realname {
2408 record.Realname = ""
2409 }
2410
2411 _, err = dc.user.updateNetwork(&record)
2412 if err != nil {
2413 return ircError{&irc.Message{
2414 Command: "FAIL",
2415 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
2416 }}
2417 }
2418
2419 dc.SendMessage(&irc.Message{
2420 Prefix: dc.srv.prefix(),
2421 Command: "BOUNCER",
2422 Params: []string{"CHANGENETWORK", idStr},
2423 })
2424 case "DELNETWORK":
2425 var idStr string
2426 if err := parseMessageParams(msg, nil, &idStr); err != nil {
2427 return err
2428 }
2429 id, err := parseBouncerNetID(subcommand, idStr)
2430 if err != nil {
2431 return err
2432 }
2433
2434 net := dc.user.getNetworkByID(id)
2435 if net == nil {
2436 return ircError{&irc.Message{
2437 Command: "FAIL",
2438 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2439 }}
2440 }
2441
2442 if err := dc.user.deleteNetwork(net.ID); err != nil {
2443 return err
2444 }
2445
2446 dc.SendMessage(&irc.Message{
2447 Prefix: dc.srv.prefix(),
2448 Command: "BOUNCER",
2449 Params: []string{"DELNETWORK", idStr},
2450 })
2451 default:
2452 return ircError{&irc.Message{
2453 Command: "FAIL",
2454 Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
2455 }}
2456 }
2457 default:
2458 dc.logger.Printf("unhandled message: %v", msg)
2459
2460 // Only forward unknown commands in single-upstream mode
2461 uc := dc.upstream()
2462 if uc == nil {
2463 return newUnknownCommandError(msg.Command)
2464 }
2465
2466 uc.SendMessageLabeled(dc.id, msg)
2467 }
2468 return nil
2469}
2470
2471func (dc *downstreamConn) handleNickServPRIVMSG(uc *upstreamConn, text string) {
2472 username, password, ok := parseNickServCredentials(text, uc.nick)
2473 if !ok {
2474 return
2475 }
2476
2477 // User may have e.g. EXTERNAL mechanism configured. We do not want to
2478 // automatically erase the key pair or any other credentials.
2479 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
2480 return
2481 }
2482
2483 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
2484 n := uc.network
2485 n.SASL.Mechanism = "PLAIN"
2486 n.SASL.Plain.Username = username
2487 n.SASL.Plain.Password = password
2488 if err := dc.srv.db.StoreNetwork(context.TODO(), dc.user.ID, &n.Network); err != nil {
2489 dc.logger.Printf("failed to save NickServ credentials: %v", err)
2490 }
2491}
2492
2493func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
2494 fields := strings.Fields(text)
2495 if len(fields) < 2 {
2496 return "", "", false
2497 }
2498 cmd := strings.ToUpper(fields[0])
2499 params := fields[1:]
2500 switch cmd {
2501 case "REGISTER":
2502 username = nick
2503 password = params[0]
2504 case "IDENTIFY":
2505 if len(params) == 1 {
2506 username = nick
2507 password = params[0]
2508 } else {
2509 username = params[0]
2510 password = params[1]
2511 }
2512 case "SET":
2513 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
2514 username = nick
2515 password = params[1]
2516 }
2517 default:
2518 return "", "", false
2519 }
2520 return username, password, true
2521}
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