source: code/trunk/downstream.go@ 665

Last change on this file since 665 was 665, checked in by delthas, 4 years ago

Add support for draft/event-playback
File size: 65.1 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(GetNick(&network.user.User, &network.Network)),
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 "WHOX": true,
240}
241
242type downstreamConn struct {
243 conn
244
245 id uint64
246
247 registered bool
248 user *user
249 nick string
250 nickCM string
251 rawUsername string
252 networkName string
253 clientName string
254 realname string
255 hostname string
256 password string // empty after authentication
257 network *network // can be nil
258
259 negotiatingCaps bool
260 capVersion int
261 supportedCaps map[string]string
262 caps map[string]bool
263
264 lastBatchRef uint64
265
266 saslServer sasl.Server
267}
268
269func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
270 remoteAddr := ic.RemoteAddr().String()
271 logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
272 options := connOptions{Logger: logger}
273 dc := &downstreamConn{
274 conn: *newConn(srv, ic, &options),
275 id: id,
276 supportedCaps: make(map[string]string),
277 caps: make(map[string]bool),
278 }
279 dc.hostname = remoteAddr
280 if host, _, err := net.SplitHostPort(dc.hostname); err == nil {
281 dc.hostname = host
282 }
283 for k, v := range permanentDownstreamCaps {
284 dc.supportedCaps[k] = v
285 }
286 if srv.LogPath != "" {
287 dc.supportedCaps["draft/chathistory"] = ""
288 }
289 return dc
290}
291
292func (dc *downstreamConn) prefix() *irc.Prefix {
293 return &irc.Prefix{
294 Name: dc.nick,
295 User: dc.user.Username,
296 Host: dc.hostname,
297 }
298}
299
300func (dc *downstreamConn) forEachNetwork(f func(*network)) {
301 if dc.network != nil {
302 f(dc.network)
303 } else if !dc.caps["soju.im/bouncer-networks"] {
304 dc.user.forEachNetwork(f)
305 }
306}
307
308func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
309 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
310 return
311 }
312 dc.user.forEachUpstream(func(uc *upstreamConn) {
313 if dc.network != nil && uc.network != dc.network {
314 return
315 }
316 f(uc)
317 })
318}
319
320// upstream returns the upstream connection, if any. If there are zero or if
321// there are multiple upstream connections, it returns nil.
322func (dc *downstreamConn) upstream() *upstreamConn {
323 if dc.network == nil {
324 return nil
325 }
326 return dc.network.conn
327}
328
329func isOurNick(net *network, nick string) bool {
330 // TODO: this doesn't account for nick changes
331 if net.conn != nil {
332 return net.casemap(nick) == net.conn.nickCM
333 }
334 // We're not currently connected to the upstream connection, so we don't
335 // know whether this name is our nickname. Best-effort: use the network's
336 // configured nickname and hope it was the one being used when we were
337 // connected.
338 return net.casemap(nick) == net.casemap(GetNick(&net.user.User, &net.Network))
339}
340
341// marshalEntity converts an upstream entity name (ie. channel or nick) into a
342// downstream entity name.
343//
344// This involves adding a "/<network>" suffix if the entity isn't the current
345// user.
346func (dc *downstreamConn) marshalEntity(net *network, name string) string {
347 if isOurNick(net, name) {
348 return dc.nick
349 }
350 name = partialCasemap(net.casemap, name)
351 if dc.network != nil {
352 if dc.network != net {
353 panic("soju: tried to marshal an entity for another network")
354 }
355 return name
356 }
357 return name + "/" + net.GetName()
358}
359
360func (dc *downstreamConn) marshalUserPrefix(net *network, prefix *irc.Prefix) *irc.Prefix {
361 if isOurNick(net, prefix.Name) {
362 return dc.prefix()
363 }
364 prefix.Name = partialCasemap(net.casemap, prefix.Name)
365 if dc.network != nil {
366 if dc.network != net {
367 panic("soju: tried to marshal a user prefix for another network")
368 }
369 return prefix
370 }
371 return &irc.Prefix{
372 Name: prefix.Name + "/" + net.GetName(),
373 User: prefix.User,
374 Host: prefix.Host,
375 }
376}
377
378// unmarshalEntityNetwork converts a downstream entity name (ie. channel or
379// nick) into an upstream entity name.
380//
381// This involves removing the "/<network>" suffix.
382func (dc *downstreamConn) unmarshalEntityNetwork(name string) (*network, string, error) {
383 if dc.network != nil {
384 return dc.network, name, nil
385 }
386
387 var net *network
388 if i := strings.LastIndexByte(name, '/'); i >= 0 {
389 network := name[i+1:]
390 name = name[:i]
391
392 for _, n := range dc.user.networks {
393 if network == n.GetName() {
394 net = n
395 break
396 }
397 }
398 }
399
400 if net == nil {
401 return nil, "", ircError{&irc.Message{
402 Command: irc.ERR_NOSUCHCHANNEL,
403 Params: []string{name, "Missing network suffix in name"},
404 }}
405 }
406
407 return net, name, nil
408}
409
410// unmarshalEntity is the same as unmarshalEntityNetwork, but returns the
411// upstream connection and fails if the upstream is disconnected.
412func (dc *downstreamConn) unmarshalEntity(name string) (*upstreamConn, string, error) {
413 net, name, err := dc.unmarshalEntityNetwork(name)
414 if err != nil {
415 return nil, "", err
416 }
417
418 if net.conn == nil {
419 return nil, "", ircError{&irc.Message{
420 Command: irc.ERR_NOSUCHCHANNEL,
421 Params: []string{name, "Disconnected from upstream network"},
422 }}
423 }
424
425 return net.conn, name, nil
426}
427
428func (dc *downstreamConn) unmarshalText(uc *upstreamConn, text string) string {
429 if dc.upstream() != nil {
430 return text
431 }
432 // TODO: smarter parsing that ignores URLs
433 return strings.ReplaceAll(text, "/"+uc.network.GetName(), "")
434}
435
436func (dc *downstreamConn) readMessages(ch chan<- event) error {
437 for {
438 msg, err := dc.ReadMessage()
439 if errors.Is(err, io.EOF) {
440 break
441 } else if err != nil {
442 return fmt.Errorf("failed to read IRC command: %v", err)
443 }
444
445 ch <- eventDownstreamMessage{msg, dc}
446 }
447
448 return nil
449}
450
451// SendMessage sends an outgoing message.
452//
453// This can only called from the user goroutine.
454func (dc *downstreamConn) SendMessage(msg *irc.Message) {
455 if !dc.caps["message-tags"] {
456 if msg.Command == "TAGMSG" {
457 return
458 }
459 msg = msg.Copy()
460 for name := range msg.Tags {
461 supported := false
462 switch name {
463 case "time":
464 supported = dc.caps["server-time"]
465 case "account":
466 supported = dc.caps["account"]
467 }
468 if !supported {
469 delete(msg.Tags, name)
470 }
471 }
472 }
473 if !dc.caps["batch"] && msg.Tags["batch"] != "" {
474 msg = msg.Copy()
475 delete(msg.Tags, "batch")
476 }
477 if msg.Command == "JOIN" && !dc.caps["extended-join"] {
478 msg.Params = msg.Params[:1]
479 }
480 if msg.Command == "SETNAME" && !dc.caps["setname"] {
481 return
482 }
483 if msg.Command == "AWAY" && !dc.caps["away-notify"] {
484 return
485 }
486 if msg.Command == "ACCOUNT" && !dc.caps["account-notify"] {
487 return
488 }
489
490 dc.conn.SendMessage(msg)
491}
492
493func (dc *downstreamConn) SendBatch(typ string, params []string, tags irc.Tags, f func(batchRef irc.TagValue)) {
494 dc.lastBatchRef++
495 ref := fmt.Sprintf("%v", dc.lastBatchRef)
496
497 if dc.caps["batch"] {
498 dc.SendMessage(&irc.Message{
499 Tags: tags,
500 Prefix: dc.srv.prefix(),
501 Command: "BATCH",
502 Params: append([]string{"+" + ref, typ}, params...),
503 })
504 }
505
506 f(irc.TagValue(ref))
507
508 if dc.caps["batch"] {
509 dc.SendMessage(&irc.Message{
510 Prefix: dc.srv.prefix(),
511 Command: "BATCH",
512 Params: []string{"-" + ref},
513 })
514 }
515}
516
517// sendMessageWithID sends an outgoing message with the specified internal ID.
518func (dc *downstreamConn) sendMessageWithID(msg *irc.Message, id string) {
519 dc.SendMessage(msg)
520
521 if id == "" || !dc.messageSupportsBacklog(msg) {
522 return
523 }
524
525 dc.sendPing(id)
526}
527
528// advanceMessageWithID advances history to the specified message ID without
529// sending a message. This is useful e.g. for self-messages when echo-message
530// isn't enabled.
531func (dc *downstreamConn) advanceMessageWithID(msg *irc.Message, id string) {
532 if id == "" || !dc.messageSupportsBacklog(msg) {
533 return
534 }
535
536 dc.sendPing(id)
537}
538
539// ackMsgID acknowledges that a message has been received.
540func (dc *downstreamConn) ackMsgID(id string) {
541 netID, entity, err := parseMsgID(id, nil)
542 if err != nil {
543 dc.logger.Printf("failed to ACK message ID %q: %v", id, err)
544 return
545 }
546
547 network := dc.user.getNetworkByID(netID)
548 if network == nil {
549 return
550 }
551
552 network.delivered.StoreID(entity, dc.clientName, id)
553}
554
555func (dc *downstreamConn) sendPing(msgID string) {
556 token := "soju-msgid-" + msgID
557 dc.SendMessage(&irc.Message{
558 Command: "PING",
559 Params: []string{token},
560 })
561}
562
563func (dc *downstreamConn) handlePong(token string) {
564 if !strings.HasPrefix(token, "soju-msgid-") {
565 dc.logger.Printf("received unrecognized PONG token %q", token)
566 return
567 }
568 msgID := strings.TrimPrefix(token, "soju-msgid-")
569 dc.ackMsgID(msgID)
570}
571
572// marshalMessage re-formats a message coming from an upstream connection so
573// that it's suitable for being sent on this downstream connection. Only
574// messages that may appear in logs are supported, except MODE messages which
575// may only appear in single-upstream mode.
576func (dc *downstreamConn) marshalMessage(msg *irc.Message, net *network) *irc.Message {
577 if dc.network != nil {
578 return msg
579 }
580
581 msg = msg.Copy()
582 msg.Prefix = dc.marshalUserPrefix(net, msg.Prefix)
583
584 switch msg.Command {
585 case "PRIVMSG", "NOTICE", "TAGMSG":
586 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
587 case "NICK":
588 // Nick change for another user
589 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
590 case "JOIN", "PART":
591 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
592 case "KICK":
593 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
594 msg.Params[1] = dc.marshalEntity(net, msg.Params[1])
595 case "TOPIC":
596 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
597 case "QUIT", "SETNAME":
598 // This space is intentionally left blank
599 default:
600 panic(fmt.Sprintf("unexpected %q message", msg.Command))
601 }
602
603 return msg
604}
605
606func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
607 switch msg.Command {
608 case "QUIT":
609 return dc.Close()
610 default:
611 if dc.registered {
612 return dc.handleMessageRegistered(msg)
613 } else {
614 return dc.handleMessageUnregistered(msg)
615 }
616 }
617}
618
619func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
620 switch msg.Command {
621 case "NICK":
622 var nick string
623 if err := parseMessageParams(msg, &nick); err != nil {
624 return err
625 }
626 if strings.ContainsAny(nick, illegalNickChars) {
627 return ircError{&irc.Message{
628 Command: irc.ERR_ERRONEUSNICKNAME,
629 Params: []string{dc.nick, nick, "contains illegal characters"},
630 }}
631 }
632 nickCM := casemapASCII(nick)
633 if nickCM == serviceNickCM {
634 return ircError{&irc.Message{
635 Command: irc.ERR_NICKNAMEINUSE,
636 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
637 }}
638 }
639 dc.nick = nick
640 dc.nickCM = nickCM
641 case "USER":
642 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
643 return err
644 }
645 case "PASS":
646 if err := parseMessageParams(msg, &dc.password); err != nil {
647 return err
648 }
649 case "CAP":
650 var subCmd string
651 if err := parseMessageParams(msg, &subCmd); err != nil {
652 return err
653 }
654 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
655 return err
656 }
657 case "AUTHENTICATE":
658 if !dc.caps["sasl"] {
659 return ircError{&irc.Message{
660 Command: irc.ERR_SASLFAIL,
661 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
662 }}
663 }
664 if len(msg.Params) == 0 {
665 return ircError{&irc.Message{
666 Command: irc.ERR_SASLFAIL,
667 Params: []string{"*", "Missing AUTHENTICATE argument"},
668 }}
669 }
670 if dc.nick == "" {
671 return ircError{&irc.Message{
672 Command: irc.ERR_SASLFAIL,
673 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
674 }}
675 }
676
677 var resp []byte
678 if msg.Params[0] == "*" {
679 dc.saslServer = nil
680 return ircError{&irc.Message{
681 Command: irc.ERR_SASLABORTED,
682 Params: []string{"*", "SASL authentication aborted"},
683 }}
684 } else if dc.saslServer == nil {
685 mech := strings.ToUpper(msg.Params[0])
686 switch mech {
687 case "PLAIN":
688 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
689 return dc.authenticate(username, password)
690 }))
691 default:
692 return ircError{&irc.Message{
693 Command: irc.ERR_SASLFAIL,
694 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
695 }}
696 }
697 } else if msg.Params[0] == "+" {
698 resp = nil
699 } else {
700 // TODO: multi-line messages
701 var err error
702 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
703 if err != nil {
704 dc.saslServer = nil
705 return ircError{&irc.Message{
706 Command: irc.ERR_SASLFAIL,
707 Params: []string{"*", "Invalid base64-encoded response"},
708 }}
709 }
710 }
711
712 challenge, done, err := dc.saslServer.Next(resp)
713 if err != nil {
714 dc.saslServer = nil
715 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
716 return ircError{&irc.Message{
717 Command: irc.ERR_SASLFAIL,
718 Params: []string{"*", ircErr.Message.Params[1]},
719 }}
720 }
721 dc.SendMessage(&irc.Message{
722 Prefix: dc.srv.prefix(),
723 Command: irc.ERR_SASLFAIL,
724 Params: []string{"*", "SASL error"},
725 })
726 return fmt.Errorf("SASL authentication failed: %v", err)
727 } else if done {
728 dc.saslServer = nil
729 dc.SendMessage(&irc.Message{
730 Prefix: dc.srv.prefix(),
731 Command: irc.RPL_LOGGEDIN,
732 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
733 })
734 dc.SendMessage(&irc.Message{
735 Prefix: dc.srv.prefix(),
736 Command: irc.RPL_SASLSUCCESS,
737 Params: []string{dc.nick, "SASL authentication successful"},
738 })
739 } else {
740 challengeStr := "+"
741 if len(challenge) > 0 {
742 challengeStr = base64.StdEncoding.EncodeToString(challenge)
743 }
744
745 // TODO: multi-line messages
746 dc.SendMessage(&irc.Message{
747 Prefix: dc.srv.prefix(),
748 Command: "AUTHENTICATE",
749 Params: []string{challengeStr},
750 })
751 }
752 case "BOUNCER":
753 var subcommand string
754 if err := parseMessageParams(msg, &subcommand); err != nil {
755 return err
756 }
757
758 switch strings.ToUpper(subcommand) {
759 case "BIND":
760 var idStr string
761 if err := parseMessageParams(msg, nil, &idStr); err != nil {
762 return err
763 }
764
765 if dc.user == nil {
766 return ircError{&irc.Message{
767 Command: "FAIL",
768 Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
769 }}
770 }
771
772 id, err := parseBouncerNetID(subcommand, idStr)
773 if err != nil {
774 return err
775 }
776
777 var match *network
778 dc.user.forEachNetwork(func(net *network) {
779 if net.ID == id {
780 match = net
781 }
782 })
783 if match == nil {
784 return ircError{&irc.Message{
785 Command: "FAIL",
786 Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
787 }}
788 }
789
790 dc.networkName = match.GetName()
791 }
792 default:
793 dc.logger.Printf("unhandled message: %v", msg)
794 return newUnknownCommandError(msg.Command)
795 }
796 if dc.rawUsername != "" && dc.nick != "" && !dc.negotiatingCaps {
797 return dc.register()
798 }
799 return nil
800}
801
802func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
803 cmd = strings.ToUpper(cmd)
804
805 replyTo := dc.nick
806 if !dc.registered {
807 replyTo = "*"
808 }
809
810 switch cmd {
811 case "LS":
812 if len(args) > 0 {
813 var err error
814 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
815 return err
816 }
817 }
818 if !dc.registered && dc.capVersion >= 302 {
819 // Let downstream show everything it supports, and trim
820 // down the available capabilities when upstreams are
821 // known.
822 for k, v := range needAllDownstreamCaps {
823 dc.supportedCaps[k] = v
824 }
825 }
826
827 caps := make([]string, 0, len(dc.supportedCaps))
828 for k, v := range dc.supportedCaps {
829 if dc.capVersion >= 302 && v != "" {
830 caps = append(caps, k+"="+v)
831 } else {
832 caps = append(caps, k)
833 }
834 }
835
836 // TODO: multi-line replies
837 dc.SendMessage(&irc.Message{
838 Prefix: dc.srv.prefix(),
839 Command: "CAP",
840 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
841 })
842
843 if dc.capVersion >= 302 {
844 // CAP version 302 implicitly enables cap-notify
845 dc.caps["cap-notify"] = true
846 }
847
848 if !dc.registered {
849 dc.negotiatingCaps = true
850 }
851 case "LIST":
852 var caps []string
853 for name, enabled := range dc.caps {
854 if enabled {
855 caps = append(caps, name)
856 }
857 }
858
859 // TODO: multi-line replies
860 dc.SendMessage(&irc.Message{
861 Prefix: dc.srv.prefix(),
862 Command: "CAP",
863 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
864 })
865 case "REQ":
866 if len(args) == 0 {
867 return ircError{&irc.Message{
868 Command: err_invalidcapcmd,
869 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
870 }}
871 }
872
873 // TODO: atomically ack/nak the whole capability set
874 caps := strings.Fields(args[0])
875 ack := true
876 for _, name := range caps {
877 name = strings.ToLower(name)
878 enable := !strings.HasPrefix(name, "-")
879 if !enable {
880 name = strings.TrimPrefix(name, "-")
881 }
882
883 if enable == dc.caps[name] {
884 continue
885 }
886
887 _, ok := dc.supportedCaps[name]
888 if !ok {
889 ack = false
890 break
891 }
892
893 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
894 // cap-notify cannot be disabled with CAP version 302
895 ack = false
896 break
897 }
898
899 dc.caps[name] = enable
900 }
901
902 reply := "NAK"
903 if ack {
904 reply = "ACK"
905 }
906 dc.SendMessage(&irc.Message{
907 Prefix: dc.srv.prefix(),
908 Command: "CAP",
909 Params: []string{replyTo, reply, args[0]},
910 })
911
912 if !dc.registered {
913 dc.negotiatingCaps = true
914 }
915 case "END":
916 dc.negotiatingCaps = false
917 default:
918 return ircError{&irc.Message{
919 Command: err_invalidcapcmd,
920 Params: []string{replyTo, cmd, "Unknown CAP command"},
921 }}
922 }
923 return nil
924}
925
926func (dc *downstreamConn) setSupportedCap(name, value string) {
927 prevValue, hasPrev := dc.supportedCaps[name]
928 changed := !hasPrev || prevValue != value
929 dc.supportedCaps[name] = value
930
931 if !dc.caps["cap-notify"] || !changed {
932 return
933 }
934
935 replyTo := dc.nick
936 if !dc.registered {
937 replyTo = "*"
938 }
939
940 cap := name
941 if value != "" && dc.capVersion >= 302 {
942 cap = name + "=" + value
943 }
944
945 dc.SendMessage(&irc.Message{
946 Prefix: dc.srv.prefix(),
947 Command: "CAP",
948 Params: []string{replyTo, "NEW", cap},
949 })
950}
951
952func (dc *downstreamConn) unsetSupportedCap(name string) {
953 _, hasPrev := dc.supportedCaps[name]
954 delete(dc.supportedCaps, name)
955 delete(dc.caps, name)
956
957 if !dc.caps["cap-notify"] || !hasPrev {
958 return
959 }
960
961 replyTo := dc.nick
962 if !dc.registered {
963 replyTo = "*"
964 }
965
966 dc.SendMessage(&irc.Message{
967 Prefix: dc.srv.prefix(),
968 Command: "CAP",
969 Params: []string{replyTo, "DEL", name},
970 })
971}
972
973func (dc *downstreamConn) updateSupportedCaps() {
974 supportedCaps := make(map[string]bool)
975 for cap := range needAllDownstreamCaps {
976 supportedCaps[cap] = true
977 }
978 dc.forEachUpstream(func(uc *upstreamConn) {
979 for cap, supported := range supportedCaps {
980 supportedCaps[cap] = supported && uc.caps[cap]
981 }
982 })
983
984 for cap, supported := range supportedCaps {
985 if supported {
986 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
987 } else {
988 dc.unsetSupportedCap(cap)
989 }
990 }
991
992 if dc.srv.LogPath != "" && dc.network != nil {
993 dc.setSupportedCap("draft/event-playback", "")
994 } else {
995 dc.unsetSupportedCap("draft/event-playback")
996 }
997}
998
999func (dc *downstreamConn) updateNick() {
1000 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
1001 dc.SendMessage(&irc.Message{
1002 Prefix: dc.prefix(),
1003 Command: "NICK",
1004 Params: []string{uc.nick},
1005 })
1006 dc.nick = uc.nick
1007 dc.nickCM = casemapASCII(dc.nick)
1008 }
1009}
1010
1011func (dc *downstreamConn) updateRealname() {
1012 if uc := dc.upstream(); uc != nil && uc.realname != dc.realname && dc.caps["setname"] {
1013 dc.SendMessage(&irc.Message{
1014 Prefix: dc.prefix(),
1015 Command: "SETNAME",
1016 Params: []string{uc.realname},
1017 })
1018 dc.realname = uc.realname
1019 }
1020}
1021
1022func sanityCheckServer(addr string) error {
1023 dialer := net.Dialer{Timeout: 30 * time.Second}
1024 conn, err := tls.DialWithDialer(&dialer, "tcp", addr, nil)
1025 if err != nil {
1026 return err
1027 }
1028 return conn.Close()
1029}
1030
1031func unmarshalUsername(rawUsername string) (username, client, network string) {
1032 username = rawUsername
1033
1034 i := strings.IndexAny(username, "/@")
1035 j := strings.LastIndexAny(username, "/@")
1036 if i >= 0 {
1037 username = rawUsername[:i]
1038 }
1039 if j >= 0 {
1040 if rawUsername[j] == '@' {
1041 client = rawUsername[j+1:]
1042 } else {
1043 network = rawUsername[j+1:]
1044 }
1045 }
1046 if i >= 0 && j >= 0 && i < j {
1047 if rawUsername[i] == '@' {
1048 client = rawUsername[i+1 : j]
1049 } else {
1050 network = rawUsername[i+1 : j]
1051 }
1052 }
1053
1054 return username, client, network
1055}
1056
1057func (dc *downstreamConn) authenticate(username, password string) error {
1058 username, clientName, networkName := unmarshalUsername(username)
1059
1060 u, err := dc.srv.db.GetUser(context.TODO(), username)
1061 if err != nil {
1062 dc.logger.Printf("failed authentication for %q: user not found: %v", username, err)
1063 return errAuthFailed
1064 }
1065
1066 // Password auth disabled
1067 if u.Password == "" {
1068 return errAuthFailed
1069 }
1070
1071 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
1072 if err != nil {
1073 dc.logger.Printf("failed authentication for %q: wrong password: %v", username, err)
1074 return errAuthFailed
1075 }
1076
1077 dc.user = dc.srv.getUser(username)
1078 if dc.user == nil {
1079 dc.logger.Printf("failed authentication for %q: user not active", username)
1080 return errAuthFailed
1081 }
1082 dc.clientName = clientName
1083 dc.networkName = networkName
1084 return nil
1085}
1086
1087func (dc *downstreamConn) register() error {
1088 if dc.registered {
1089 return fmt.Errorf("tried to register twice")
1090 }
1091
1092 password := dc.password
1093 dc.password = ""
1094 if dc.user == nil {
1095 if err := dc.authenticate(dc.rawUsername, password); err != nil {
1096 return err
1097 }
1098 }
1099
1100 if dc.clientName == "" && dc.networkName == "" {
1101 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
1102 }
1103
1104 dc.registered = true
1105 dc.logger.Printf("registration complete for user %q", dc.user.Username)
1106 return nil
1107}
1108
1109func (dc *downstreamConn) loadNetwork() error {
1110 if dc.networkName == "" {
1111 return nil
1112 }
1113
1114 network := dc.user.getNetwork(dc.networkName)
1115 if network == nil {
1116 addr := dc.networkName
1117 if !strings.ContainsRune(addr, ':') {
1118 addr = addr + ":6697"
1119 }
1120
1121 dc.logger.Printf("trying to connect to new network %q", addr)
1122 if err := sanityCheckServer(addr); err != nil {
1123 dc.logger.Printf("failed to connect to %q: %v", addr, err)
1124 return ircError{&irc.Message{
1125 Command: irc.ERR_PASSWDMISMATCH,
1126 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
1127 }}
1128 }
1129
1130 // Some clients only allow specifying the nickname (and use the
1131 // nickname as a username too). Strip the network name from the
1132 // nickname when auto-saving networks.
1133 nick, _, _ := unmarshalUsername(dc.nick)
1134
1135 dc.logger.Printf("auto-saving network %q", dc.networkName)
1136 var err error
1137 network, err = dc.user.createNetwork(&Network{
1138 Addr: dc.networkName,
1139 Nick: nick,
1140 Enabled: true,
1141 })
1142 if err != nil {
1143 return err
1144 }
1145 }
1146
1147 dc.network = network
1148 return nil
1149}
1150
1151func (dc *downstreamConn) welcome() error {
1152 if dc.user == nil || !dc.registered {
1153 panic("tried to welcome an unregistered connection")
1154 }
1155
1156 // TODO: doing this might take some time. We should do it in dc.register
1157 // instead, but we'll potentially be adding a new network and this must be
1158 // done in the user goroutine.
1159 if err := dc.loadNetwork(); err != nil {
1160 return err
1161 }
1162
1163 isupport := []string{
1164 fmt.Sprintf("CHATHISTORY=%v", dc.srv.HistoryLimit),
1165 "CASEMAPPING=ascii",
1166 }
1167
1168 if dc.network != nil {
1169 isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
1170 }
1171 if dc.network == nil && dc.srv.Title != "" {
1172 isupport = append(isupport, "NETWORK="+encodeISUPPORT(dc.srv.Title))
1173 }
1174 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
1175 isupport = append(isupport, "WHOX")
1176 }
1177
1178 if uc := dc.upstream(); uc != nil {
1179 for k := range passthroughIsupport {
1180 v, ok := uc.isupport[k]
1181 if !ok {
1182 continue
1183 }
1184 if v != nil {
1185 isupport = append(isupport, fmt.Sprintf("%v=%v", k, *v))
1186 } else {
1187 isupport = append(isupport, k)
1188 }
1189 }
1190 }
1191
1192 dc.SendMessage(&irc.Message{
1193 Prefix: dc.srv.prefix(),
1194 Command: irc.RPL_WELCOME,
1195 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
1196 })
1197 dc.SendMessage(&irc.Message{
1198 Prefix: dc.srv.prefix(),
1199 Command: irc.RPL_YOURHOST,
1200 Params: []string{dc.nick, "Your host is " + dc.srv.Hostname},
1201 })
1202 dc.SendMessage(&irc.Message{
1203 Prefix: dc.srv.prefix(),
1204 Command: irc.RPL_MYINFO,
1205 Params: []string{dc.nick, dc.srv.Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
1206 })
1207 for _, msg := range generateIsupport(dc.srv.prefix(), dc.nick, isupport) {
1208 dc.SendMessage(msg)
1209 }
1210 if uc := dc.upstream(); uc != nil {
1211 dc.SendMessage(&irc.Message{
1212 Prefix: dc.srv.prefix(),
1213 Command: irc.RPL_UMODEIS,
1214 Params: []string{dc.nick, string(uc.modes)},
1215 })
1216 }
1217
1218 if motd := dc.user.srv.MOTD(); motd != "" && dc.network == nil {
1219 for _, msg := range generateMOTD(dc.srv.prefix(), dc.nick, motd) {
1220 dc.SendMessage(msg)
1221 }
1222 } else {
1223 motdHint := "No MOTD"
1224 if dc.network != nil {
1225 motdHint = "Use /motd to read the message of the day"
1226 }
1227 dc.SendMessage(&irc.Message{
1228 Prefix: dc.srv.prefix(),
1229 Command: irc.ERR_NOMOTD,
1230 Params: []string{dc.nick, motdHint},
1231 })
1232 }
1233
1234 dc.updateNick()
1235 dc.updateRealname()
1236 dc.updateSupportedCaps()
1237
1238 if dc.caps["soju.im/bouncer-networks-notify"] {
1239 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
1240 dc.user.forEachNetwork(func(network *network) {
1241 idStr := fmt.Sprintf("%v", network.ID)
1242 attrs := getNetworkAttrs(network)
1243 dc.SendMessage(&irc.Message{
1244 Tags: irc.Tags{"batch": batchRef},
1245 Prefix: dc.srv.prefix(),
1246 Command: "BOUNCER",
1247 Params: []string{"NETWORK", idStr, attrs.String()},
1248 })
1249 })
1250 })
1251 }
1252
1253 dc.forEachUpstream(func(uc *upstreamConn) {
1254 for _, entry := range uc.channels.innerMap {
1255 ch := entry.value.(*upstreamChannel)
1256 if !ch.complete {
1257 continue
1258 }
1259 record := uc.network.channels.Value(ch.Name)
1260 if record != nil && record.Detached {
1261 continue
1262 }
1263
1264 dc.SendMessage(&irc.Message{
1265 Prefix: dc.prefix(),
1266 Command: "JOIN",
1267 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
1268 })
1269
1270 forwardChannel(dc, ch)
1271 }
1272 })
1273
1274 dc.forEachNetwork(func(net *network) {
1275 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1276 return
1277 }
1278
1279 // Only send history if we're the first connected client with that name
1280 // for the network
1281 firstClient := true
1282 dc.user.forEachDownstream(func(c *downstreamConn) {
1283 if c != dc && c.clientName == dc.clientName && c.network == dc.network {
1284 firstClient = false
1285 }
1286 })
1287 if firstClient {
1288 net.delivered.ForEachTarget(func(target string) {
1289 lastDelivered := net.delivered.LoadID(target, dc.clientName)
1290 if lastDelivered == "" {
1291 return
1292 }
1293
1294 dc.sendTargetBacklog(net, target, lastDelivered)
1295
1296 // Fast-forward history to last message
1297 targetCM := net.casemap(target)
1298 lastID, err := dc.user.msgStore.LastMsgID(net, targetCM, time.Now())
1299 if err != nil {
1300 dc.logger.Printf("failed to get last message ID: %v", err)
1301 return
1302 }
1303 net.delivered.StoreID(target, dc.clientName, lastID)
1304 })
1305 }
1306 })
1307
1308 return nil
1309}
1310
1311// messageSupportsBacklog checks whether the provided message can be sent as
1312// part of an history batch.
1313func (dc *downstreamConn) messageSupportsBacklog(msg *irc.Message) bool {
1314 // Don't replay all messages, because that would mess up client
1315 // state. For instance we just sent the list of users, sending
1316 // PART messages for one of these users would be incorrect.
1317 switch msg.Command {
1318 case "PRIVMSG", "NOTICE":
1319 return true
1320 }
1321 return false
1322}
1323
1324func (dc *downstreamConn) sendTargetBacklog(net *network, target, msgID string) {
1325 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1326 return
1327 }
1328
1329 ch := net.channels.Value(target)
1330
1331 limit := 4000
1332 targetCM := net.casemap(target)
1333 history, err := dc.user.msgStore.LoadLatestID(net, targetCM, msgID, limit)
1334 if err != nil {
1335 dc.logger.Printf("failed to send backlog for %q: %v", target, err)
1336 return
1337 }
1338
1339 dc.SendBatch("chathistory", []string{dc.marshalEntity(net, target)}, nil, func(batchRef irc.TagValue) {
1340 for _, msg := range history {
1341 if ch != nil && ch.Detached {
1342 if net.detachedMessageNeedsRelay(ch, msg) {
1343 dc.relayDetachedMessage(net, msg)
1344 }
1345 } else {
1346 msg.Tags["batch"] = batchRef
1347 dc.SendMessage(dc.marshalMessage(msg, net))
1348 }
1349 }
1350 })
1351}
1352
1353func (dc *downstreamConn) relayDetachedMessage(net *network, msg *irc.Message) {
1354 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
1355 return
1356 }
1357
1358 sender := msg.Prefix.Name
1359 target, text := msg.Params[0], msg.Params[1]
1360 if net.isHighlight(msg) {
1361 sendServiceNOTICE(dc, fmt.Sprintf("highlight in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1362 } else {
1363 sendServiceNOTICE(dc, fmt.Sprintf("message in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1364 }
1365}
1366
1367func (dc *downstreamConn) runUntilRegistered() error {
1368 for !dc.registered {
1369 msg, err := dc.ReadMessage()
1370 if err != nil {
1371 return fmt.Errorf("failed to read IRC command: %w", err)
1372 }
1373
1374 err = dc.handleMessage(msg)
1375 if ircErr, ok := err.(ircError); ok {
1376 ircErr.Message.Prefix = dc.srv.prefix()
1377 dc.SendMessage(ircErr.Message)
1378 } else if err != nil {
1379 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
1380 }
1381 }
1382
1383 return nil
1384}
1385
1386func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
1387 switch msg.Command {
1388 case "CAP":
1389 var subCmd string
1390 if err := parseMessageParams(msg, &subCmd); err != nil {
1391 return err
1392 }
1393 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
1394 return err
1395 }
1396 case "PING":
1397 var source, destination string
1398 if err := parseMessageParams(msg, &source); err != nil {
1399 return err
1400 }
1401 if len(msg.Params) > 1 {
1402 destination = msg.Params[1]
1403 }
1404 if destination != "" && destination != dc.srv.Hostname {
1405 return ircError{&irc.Message{
1406 Command: irc.ERR_NOSUCHSERVER,
1407 Params: []string{dc.nick, destination, "No such server"},
1408 }}
1409 }
1410 dc.SendMessage(&irc.Message{
1411 Prefix: dc.srv.prefix(),
1412 Command: "PONG",
1413 Params: []string{dc.srv.Hostname, source},
1414 })
1415 return nil
1416 case "PONG":
1417 if len(msg.Params) == 0 {
1418 return newNeedMoreParamsError(msg.Command)
1419 }
1420 token := msg.Params[len(msg.Params)-1]
1421 dc.handlePong(token)
1422 case "USER":
1423 return ircError{&irc.Message{
1424 Command: irc.ERR_ALREADYREGISTERED,
1425 Params: []string{dc.nick, "You may not reregister"},
1426 }}
1427 case "NICK":
1428 var rawNick string
1429 if err := parseMessageParams(msg, &rawNick); err != nil {
1430 return err
1431 }
1432
1433 nick := rawNick
1434 var upstream *upstreamConn
1435 if dc.upstream() == nil {
1436 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
1437 if err == nil { // NICK nick/network: NICK only on a specific upstream
1438 upstream = uc
1439 nick = unmarshaledNick
1440 }
1441 }
1442
1443 if strings.ContainsAny(nick, illegalNickChars) {
1444 return ircError{&irc.Message{
1445 Command: irc.ERR_ERRONEUSNICKNAME,
1446 Params: []string{dc.nick, rawNick, "contains illegal characters"},
1447 }}
1448 }
1449 if casemapASCII(nick) == serviceNickCM {
1450 return ircError{&irc.Message{
1451 Command: irc.ERR_NICKNAMEINUSE,
1452 Params: []string{dc.nick, rawNick, "Nickname reserved for bouncer service"},
1453 }}
1454 }
1455
1456 var err error
1457 dc.forEachNetwork(func(n *network) {
1458 if err != nil || (upstream != nil && upstream.network != n) {
1459 return
1460 }
1461 n.Nick = nick
1462 err = dc.srv.db.StoreNetwork(context.TODO(), dc.user.ID, &n.Network)
1463 })
1464 if err != nil {
1465 return err
1466 }
1467
1468 dc.forEachUpstream(func(uc *upstreamConn) {
1469 if upstream != nil && upstream != uc {
1470 return
1471 }
1472 uc.SendMessageLabeled(dc.id, &irc.Message{
1473 Command: "NICK",
1474 Params: []string{nick},
1475 })
1476 })
1477
1478 if dc.upstream() == nil && upstream == nil && dc.nick != nick {
1479 dc.SendMessage(&irc.Message{
1480 Prefix: dc.prefix(),
1481 Command: "NICK",
1482 Params: []string{nick},
1483 })
1484 dc.nick = nick
1485 dc.nickCM = casemapASCII(dc.nick)
1486 }
1487 case "SETNAME":
1488 var realname string
1489 if err := parseMessageParams(msg, &realname); err != nil {
1490 return err
1491 }
1492
1493 // If the client just resets to the default, just wipe the per-network
1494 // preference
1495 storeRealname := realname
1496 if realname == dc.user.Realname {
1497 storeRealname = ""
1498 }
1499
1500 var storeErr error
1501 var needUpdate []Network
1502 dc.forEachNetwork(func(n *network) {
1503 // We only need to call updateNetwork for upstreams that don't
1504 // support setname
1505 if uc := n.conn; uc != nil && uc.caps["setname"] {
1506 uc.SendMessageLabeled(dc.id, &irc.Message{
1507 Command: "SETNAME",
1508 Params: []string{realname},
1509 })
1510
1511 n.Realname = storeRealname
1512 if err := dc.srv.db.StoreNetwork(context.TODO(), dc.user.ID, &n.Network); err != nil {
1513 dc.logger.Printf("failed to store network realname: %v", err)
1514 storeErr = err
1515 }
1516 return
1517 }
1518
1519 record := n.Network // copy network record because we'll mutate it
1520 record.Realname = storeRealname
1521 needUpdate = append(needUpdate, record)
1522 })
1523
1524 // Walk the network list as a second step, because updateNetwork
1525 // mutates the original list
1526 for _, record := range needUpdate {
1527 if _, err := dc.user.updateNetwork(&record); err != nil {
1528 dc.logger.Printf("failed to update network realname: %v", err)
1529 storeErr = err
1530 }
1531 }
1532 if storeErr != nil {
1533 return ircError{&irc.Message{
1534 Command: "FAIL",
1535 Params: []string{"SETNAME", "CANNOT_CHANGE_REALNAME", "Failed to update realname"},
1536 }}
1537 }
1538
1539 if dc.upstream() == nil {
1540 dc.SendMessage(&irc.Message{
1541 Prefix: dc.prefix(),
1542 Command: "SETNAME",
1543 Params: []string{realname},
1544 })
1545 }
1546 case "JOIN":
1547 var namesStr string
1548 if err := parseMessageParams(msg, &namesStr); err != nil {
1549 return err
1550 }
1551
1552 var keys []string
1553 if len(msg.Params) > 1 {
1554 keys = strings.Split(msg.Params[1], ",")
1555 }
1556
1557 for i, name := range strings.Split(namesStr, ",") {
1558 uc, upstreamName, err := dc.unmarshalEntity(name)
1559 if err != nil {
1560 return err
1561 }
1562
1563 var key string
1564 if len(keys) > i {
1565 key = keys[i]
1566 }
1567
1568 if !uc.isChannel(upstreamName) {
1569 dc.SendMessage(&irc.Message{
1570 Prefix: dc.srv.prefix(),
1571 Command: irc.ERR_NOSUCHCHANNEL,
1572 Params: []string{name, "Not a channel name"},
1573 })
1574 continue
1575 }
1576
1577 params := []string{upstreamName}
1578 if key != "" {
1579 params = append(params, key)
1580 }
1581 uc.SendMessageLabeled(dc.id, &irc.Message{
1582 Command: "JOIN",
1583 Params: params,
1584 })
1585
1586 ch := uc.network.channels.Value(upstreamName)
1587 if ch != nil {
1588 // Don't clear the channel key if there's one set
1589 // TODO: add a way to unset the channel key
1590 if key != "" {
1591 ch.Key = key
1592 }
1593 uc.network.attach(ch)
1594 } else {
1595 ch = &Channel{
1596 Name: upstreamName,
1597 Key: key,
1598 }
1599 uc.network.channels.SetValue(upstreamName, ch)
1600 }
1601 if err := dc.srv.db.StoreChannel(context.TODO(), uc.network.ID, ch); err != nil {
1602 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1603 }
1604 }
1605 case "PART":
1606 var namesStr string
1607 if err := parseMessageParams(msg, &namesStr); err != nil {
1608 return err
1609 }
1610
1611 var reason string
1612 if len(msg.Params) > 1 {
1613 reason = msg.Params[1]
1614 }
1615
1616 for _, name := range strings.Split(namesStr, ",") {
1617 uc, upstreamName, err := dc.unmarshalEntity(name)
1618 if err != nil {
1619 return err
1620 }
1621
1622 if strings.EqualFold(reason, "detach") {
1623 ch := uc.network.channels.Value(upstreamName)
1624 if ch != nil {
1625 uc.network.detach(ch)
1626 } else {
1627 ch = &Channel{
1628 Name: name,
1629 Detached: true,
1630 }
1631 uc.network.channels.SetValue(upstreamName, ch)
1632 }
1633 if err := dc.srv.db.StoreChannel(context.TODO(), uc.network.ID, ch); err != nil {
1634 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1635 }
1636 } else {
1637 params := []string{upstreamName}
1638 if reason != "" {
1639 params = append(params, reason)
1640 }
1641 uc.SendMessageLabeled(dc.id, &irc.Message{
1642 Command: "PART",
1643 Params: params,
1644 })
1645
1646 if err := uc.network.deleteChannel(upstreamName); err != nil {
1647 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1648 }
1649 }
1650 }
1651 case "KICK":
1652 var channelStr, userStr string
1653 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1654 return err
1655 }
1656
1657 channels := strings.Split(channelStr, ",")
1658 users := strings.Split(userStr, ",")
1659
1660 var reason string
1661 if len(msg.Params) > 2 {
1662 reason = msg.Params[2]
1663 }
1664
1665 if len(channels) != 1 && len(channels) != len(users) {
1666 return ircError{&irc.Message{
1667 Command: irc.ERR_BADCHANMASK,
1668 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1669 }}
1670 }
1671
1672 for i, user := range users {
1673 var channel string
1674 if len(channels) == 1 {
1675 channel = channels[0]
1676 } else {
1677 channel = channels[i]
1678 }
1679
1680 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1681 if err != nil {
1682 return err
1683 }
1684
1685 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1686 if err != nil {
1687 return err
1688 }
1689
1690 if ucChannel != ucUser {
1691 return ircError{&irc.Message{
1692 Command: irc.ERR_USERNOTINCHANNEL,
1693 Params: []string{dc.nick, user, channel, "They are on another network"},
1694 }}
1695 }
1696 uc := ucChannel
1697
1698 params := []string{upstreamChannel, upstreamUser}
1699 if reason != "" {
1700 params = append(params, reason)
1701 }
1702 uc.SendMessageLabeled(dc.id, &irc.Message{
1703 Command: "KICK",
1704 Params: params,
1705 })
1706 }
1707 case "MODE":
1708 var name string
1709 if err := parseMessageParams(msg, &name); err != nil {
1710 return err
1711 }
1712
1713 var modeStr string
1714 if len(msg.Params) > 1 {
1715 modeStr = msg.Params[1]
1716 }
1717
1718 if casemapASCII(name) == dc.nickCM {
1719 if modeStr != "" {
1720 if uc := dc.upstream(); uc != nil {
1721 uc.SendMessageLabeled(dc.id, &irc.Message{
1722 Command: "MODE",
1723 Params: []string{uc.nick, modeStr},
1724 })
1725 } else {
1726 dc.SendMessage(&irc.Message{
1727 Prefix: dc.srv.prefix(),
1728 Command: irc.ERR_UMODEUNKNOWNFLAG,
1729 Params: []string{dc.nick, "Cannot change user mode in multi-upstream mode"},
1730 })
1731 }
1732 } else {
1733 var userMode string
1734 if uc := dc.upstream(); uc != nil {
1735 userMode = string(uc.modes)
1736 }
1737
1738 dc.SendMessage(&irc.Message{
1739 Prefix: dc.srv.prefix(),
1740 Command: irc.RPL_UMODEIS,
1741 Params: []string{dc.nick, userMode},
1742 })
1743 }
1744 return nil
1745 }
1746
1747 uc, upstreamName, err := dc.unmarshalEntity(name)
1748 if err != nil {
1749 return err
1750 }
1751
1752 if !uc.isChannel(upstreamName) {
1753 return ircError{&irc.Message{
1754 Command: irc.ERR_USERSDONTMATCH,
1755 Params: []string{dc.nick, "Cannot change mode for other users"},
1756 }}
1757 }
1758
1759 if modeStr != "" {
1760 params := []string{upstreamName, modeStr}
1761 params = append(params, msg.Params[2:]...)
1762 uc.SendMessageLabeled(dc.id, &irc.Message{
1763 Command: "MODE",
1764 Params: params,
1765 })
1766 } else {
1767 ch := uc.channels.Value(upstreamName)
1768 if ch == nil {
1769 return ircError{&irc.Message{
1770 Command: irc.ERR_NOSUCHCHANNEL,
1771 Params: []string{dc.nick, name, "No such channel"},
1772 }}
1773 }
1774
1775 if ch.modes == nil {
1776 // we haven't received the initial RPL_CHANNELMODEIS yet
1777 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1778 return nil
1779 }
1780
1781 modeStr, modeParams := ch.modes.Format()
1782 params := []string{dc.nick, name, modeStr}
1783 params = append(params, modeParams...)
1784
1785 dc.SendMessage(&irc.Message{
1786 Prefix: dc.srv.prefix(),
1787 Command: irc.RPL_CHANNELMODEIS,
1788 Params: params,
1789 })
1790 if ch.creationTime != "" {
1791 dc.SendMessage(&irc.Message{
1792 Prefix: dc.srv.prefix(),
1793 Command: rpl_creationtime,
1794 Params: []string{dc.nick, name, ch.creationTime},
1795 })
1796 }
1797 }
1798 case "TOPIC":
1799 var channel string
1800 if err := parseMessageParams(msg, &channel); err != nil {
1801 return err
1802 }
1803
1804 uc, upstreamName, err := dc.unmarshalEntity(channel)
1805 if err != nil {
1806 return err
1807 }
1808
1809 if len(msg.Params) > 1 { // setting topic
1810 topic := msg.Params[1]
1811 uc.SendMessageLabeled(dc.id, &irc.Message{
1812 Command: "TOPIC",
1813 Params: []string{upstreamName, topic},
1814 })
1815 } else { // getting topic
1816 ch := uc.channels.Value(upstreamName)
1817 if ch == nil {
1818 return ircError{&irc.Message{
1819 Command: irc.ERR_NOSUCHCHANNEL,
1820 Params: []string{dc.nick, upstreamName, "No such channel"},
1821 }}
1822 }
1823 sendTopic(dc, ch)
1824 }
1825 case "LIST":
1826 // TODO: support ELIST when supported by all upstreams
1827
1828 pl := pendingLIST{
1829 downstreamID: dc.id,
1830 pendingCommands: make(map[int64]*irc.Message),
1831 }
1832 var upstream *upstreamConn
1833 var upstreamChannels map[int64][]string
1834 if len(msg.Params) > 0 {
1835 uc, upstreamMask, err := dc.unmarshalEntity(msg.Params[0])
1836 if err == nil && upstreamMask == "*" { // LIST */network: send LIST only to one network
1837 upstream = uc
1838 } else {
1839 upstreamChannels = make(map[int64][]string)
1840 channels := strings.Split(msg.Params[0], ",")
1841 for _, channel := range channels {
1842 uc, upstreamChannel, err := dc.unmarshalEntity(channel)
1843 if err != nil {
1844 return err
1845 }
1846 upstreamChannels[uc.network.ID] = append(upstreamChannels[uc.network.ID], upstreamChannel)
1847 }
1848 }
1849 }
1850
1851 dc.user.pendingLISTs = append(dc.user.pendingLISTs, pl)
1852 dc.forEachUpstream(func(uc *upstreamConn) {
1853 if upstream != nil && upstream != uc {
1854 return
1855 }
1856 var params []string
1857 if upstreamChannels != nil {
1858 if channels, ok := upstreamChannels[uc.network.ID]; ok {
1859 params = []string{strings.Join(channels, ",")}
1860 } else {
1861 return
1862 }
1863 }
1864 pl.pendingCommands[uc.network.ID] = &irc.Message{
1865 Command: "LIST",
1866 Params: params,
1867 }
1868 uc.trySendLIST(dc.id)
1869 })
1870 case "NAMES":
1871 if len(msg.Params) == 0 {
1872 dc.SendMessage(&irc.Message{
1873 Prefix: dc.srv.prefix(),
1874 Command: irc.RPL_ENDOFNAMES,
1875 Params: []string{dc.nick, "*", "End of /NAMES list"},
1876 })
1877 return nil
1878 }
1879
1880 channels := strings.Split(msg.Params[0], ",")
1881 for _, channel := range channels {
1882 uc, upstreamName, err := dc.unmarshalEntity(channel)
1883 if err != nil {
1884 return err
1885 }
1886
1887 ch := uc.channels.Value(upstreamName)
1888 if ch != nil {
1889 sendNames(dc, ch)
1890 } else {
1891 // NAMES on a channel we have not joined, ask upstream
1892 uc.SendMessageLabeled(dc.id, &irc.Message{
1893 Command: "NAMES",
1894 Params: []string{upstreamName},
1895 })
1896 }
1897 }
1898 // For WHOX docs, see:
1899 // - http://faerion.sourceforge.net/doc/irc/whox.var
1900 // - https://github.com/quakenet/snircd/blob/master/doc/readme.who
1901 // Note, many features aren't widely implemented, such as flags and mask2
1902 case "WHO":
1903 if len(msg.Params) == 0 {
1904 // TODO: support WHO without parameters
1905 dc.SendMessage(&irc.Message{
1906 Prefix: dc.srv.prefix(),
1907 Command: irc.RPL_ENDOFWHO,
1908 Params: []string{dc.nick, "*", "End of /WHO list"},
1909 })
1910 return nil
1911 }
1912
1913 // Clients will use the first mask to match RPL_ENDOFWHO
1914 endOfWhoToken := msg.Params[0]
1915
1916 // TODO: add support for WHOX mask2
1917 mask := msg.Params[0]
1918 var options string
1919 if len(msg.Params) > 1 {
1920 options = msg.Params[1]
1921 }
1922
1923 optionsParts := strings.SplitN(options, "%", 2)
1924 // TODO: add support for WHOX flags in optionsParts[0]
1925 var fields, whoxToken string
1926 if len(optionsParts) == 2 {
1927 optionsParts := strings.SplitN(optionsParts[1], ",", 2)
1928 fields = strings.ToLower(optionsParts[0])
1929 if len(optionsParts) == 2 && strings.Contains(fields, "t") {
1930 whoxToken = optionsParts[1]
1931 }
1932 }
1933
1934 // TODO: support mixed bouncer/upstream WHO queries
1935 maskCM := casemapASCII(mask)
1936 if dc.network == nil && maskCM == dc.nickCM {
1937 // TODO: support AWAY (H/G) in self WHO reply
1938 flags := "H"
1939 if dc.user.Admin {
1940 flags += "*"
1941 }
1942 info := whoxInfo{
1943 Token: whoxToken,
1944 Username: dc.user.Username,
1945 Hostname: dc.hostname,
1946 Server: dc.srv.Hostname,
1947 Nickname: dc.nick,
1948 Flags: flags,
1949 Account: dc.user.Username,
1950 Realname: dc.realname,
1951 }
1952 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
1953 dc.SendMessage(&irc.Message{
1954 Prefix: dc.srv.prefix(),
1955 Command: irc.RPL_ENDOFWHO,
1956 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
1957 })
1958 return nil
1959 }
1960 if maskCM == serviceNickCM {
1961 info := whoxInfo{
1962 Token: whoxToken,
1963 Username: servicePrefix.User,
1964 Hostname: servicePrefix.Host,
1965 Server: dc.srv.Hostname,
1966 Nickname: serviceNick,
1967 Flags: "H*",
1968 Account: serviceNick,
1969 Realname: serviceRealname,
1970 }
1971 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
1972 dc.SendMessage(&irc.Message{
1973 Prefix: dc.srv.prefix(),
1974 Command: irc.RPL_ENDOFWHO,
1975 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
1976 })
1977 return nil
1978 }
1979
1980 // TODO: properly support WHO masks
1981 uc, upstreamMask, err := dc.unmarshalEntity(mask)
1982 if err != nil {
1983 return err
1984 }
1985
1986 params := []string{upstreamMask}
1987 if options != "" {
1988 params = append(params, options)
1989 }
1990
1991 uc.SendMessageLabeled(dc.id, &irc.Message{
1992 Command: "WHO",
1993 Params: params,
1994 })
1995 case "WHOIS":
1996 if len(msg.Params) == 0 {
1997 return ircError{&irc.Message{
1998 Command: irc.ERR_NONICKNAMEGIVEN,
1999 Params: []string{dc.nick, "No nickname given"},
2000 }}
2001 }
2002
2003 var target, mask string
2004 if len(msg.Params) == 1 {
2005 target = ""
2006 mask = msg.Params[0]
2007 } else {
2008 target = msg.Params[0]
2009 mask = msg.Params[1]
2010 }
2011 // TODO: support multiple WHOIS users
2012 if i := strings.IndexByte(mask, ','); i >= 0 {
2013 mask = mask[:i]
2014 }
2015
2016 if dc.network == nil && casemapASCII(mask) == dc.nickCM {
2017 dc.SendMessage(&irc.Message{
2018 Prefix: dc.srv.prefix(),
2019 Command: irc.RPL_WHOISUSER,
2020 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
2021 })
2022 dc.SendMessage(&irc.Message{
2023 Prefix: dc.srv.prefix(),
2024 Command: irc.RPL_WHOISSERVER,
2025 Params: []string{dc.nick, dc.nick, dc.srv.Hostname, "soju"},
2026 })
2027 if dc.user.Admin {
2028 dc.SendMessage(&irc.Message{
2029 Prefix: dc.srv.prefix(),
2030 Command: irc.RPL_WHOISOPERATOR,
2031 Params: []string{dc.nick, dc.nick, "is a bouncer administrator"},
2032 })
2033 }
2034 dc.SendMessage(&irc.Message{
2035 Prefix: dc.srv.prefix(),
2036 Command: rpl_whoisaccount,
2037 Params: []string{dc.nick, dc.nick, dc.user.Username, "is logged in as"},
2038 })
2039 dc.SendMessage(&irc.Message{
2040 Prefix: dc.srv.prefix(),
2041 Command: irc.RPL_ENDOFWHOIS,
2042 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
2043 })
2044 return nil
2045 }
2046 if casemapASCII(mask) == serviceNickCM {
2047 dc.SendMessage(&irc.Message{
2048 Prefix: dc.srv.prefix(),
2049 Command: irc.RPL_WHOISUSER,
2050 Params: []string{dc.nick, serviceNick, servicePrefix.User, servicePrefix.Host, "*", serviceRealname},
2051 })
2052 dc.SendMessage(&irc.Message{
2053 Prefix: dc.srv.prefix(),
2054 Command: irc.RPL_WHOISSERVER,
2055 Params: []string{dc.nick, serviceNick, dc.srv.Hostname, "soju"},
2056 })
2057 dc.SendMessage(&irc.Message{
2058 Prefix: dc.srv.prefix(),
2059 Command: irc.RPL_WHOISOPERATOR,
2060 Params: []string{dc.nick, serviceNick, "is the bouncer service"},
2061 })
2062 dc.SendMessage(&irc.Message{
2063 Prefix: dc.srv.prefix(),
2064 Command: rpl_whoisaccount,
2065 Params: []string{dc.nick, serviceNick, serviceNick, "is logged in as"},
2066 })
2067 dc.SendMessage(&irc.Message{
2068 Prefix: dc.srv.prefix(),
2069 Command: irc.RPL_ENDOFWHOIS,
2070 Params: []string{dc.nick, serviceNick, "End of /WHOIS list"},
2071 })
2072 return nil
2073 }
2074
2075 // TODO: support WHOIS masks
2076 uc, upstreamNick, err := dc.unmarshalEntity(mask)
2077 if err != nil {
2078 return err
2079 }
2080
2081 var params []string
2082 if target != "" {
2083 if target == mask { // WHOIS nick nick
2084 params = []string{upstreamNick, upstreamNick}
2085 } else {
2086 params = []string{target, upstreamNick}
2087 }
2088 } else {
2089 params = []string{upstreamNick}
2090 }
2091
2092 uc.SendMessageLabeled(dc.id, &irc.Message{
2093 Command: "WHOIS",
2094 Params: params,
2095 })
2096 case "PRIVMSG", "NOTICE":
2097 var targetsStr, text string
2098 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
2099 return err
2100 }
2101 tags := copyClientTags(msg.Tags)
2102
2103 for _, name := range strings.Split(targetsStr, ",") {
2104 if name == "$"+dc.srv.Hostname || (name == "$*" && dc.network == nil) {
2105 // "$" means a server mask follows. If it's the bouncer's
2106 // hostname, broadcast the message to all bouncer users.
2107 if !dc.user.Admin {
2108 return ircError{&irc.Message{
2109 Prefix: dc.srv.prefix(),
2110 Command: irc.ERR_BADMASK,
2111 Params: []string{dc.nick, name, "Permission denied to broadcast message to all bouncer users"},
2112 }}
2113 }
2114
2115 dc.logger.Printf("broadcasting bouncer-wide %v: %v", msg.Command, text)
2116
2117 broadcastTags := tags.Copy()
2118 broadcastTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2119 broadcastMsg := &irc.Message{
2120 Tags: broadcastTags,
2121 Prefix: servicePrefix,
2122 Command: msg.Command,
2123 Params: []string{name, text},
2124 }
2125 dc.srv.forEachUser(func(u *user) {
2126 u.events <- eventBroadcast{broadcastMsg}
2127 })
2128 continue
2129 }
2130
2131 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2132 dc.SendMessage(&irc.Message{
2133 Tags: msg.Tags.Copy(),
2134 Prefix: dc.prefix(),
2135 Command: msg.Command,
2136 Params: []string{name, text},
2137 })
2138 continue
2139 }
2140
2141 if msg.Command == "PRIVMSG" && casemapASCII(name) == serviceNickCM {
2142 if dc.caps["echo-message"] {
2143 echoTags := tags.Copy()
2144 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2145 dc.SendMessage(&irc.Message{
2146 Tags: echoTags,
2147 Prefix: dc.prefix(),
2148 Command: msg.Command,
2149 Params: []string{name, text},
2150 })
2151 }
2152 handleServicePRIVMSG(dc, text)
2153 continue
2154 }
2155
2156 uc, upstreamName, err := dc.unmarshalEntity(name)
2157 if err != nil {
2158 return err
2159 }
2160
2161 if msg.Command == "PRIVMSG" && uc.network.casemap(upstreamName) == "nickserv" {
2162 dc.handleNickServPRIVMSG(uc, text)
2163 }
2164
2165 unmarshaledText := text
2166 if uc.isChannel(upstreamName) {
2167 unmarshaledText = dc.unmarshalText(uc, text)
2168 }
2169 uc.SendMessageLabeled(dc.id, &irc.Message{
2170 Tags: tags,
2171 Command: msg.Command,
2172 Params: []string{upstreamName, unmarshaledText},
2173 })
2174
2175 echoTags := tags.Copy()
2176 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2177 if uc.account != "" {
2178 echoTags["account"] = irc.TagValue(uc.account)
2179 }
2180 echoMsg := &irc.Message{
2181 Tags: echoTags,
2182 Prefix: &irc.Prefix{
2183 Name: uc.nick,
2184 User: uc.username,
2185 },
2186 Command: msg.Command,
2187 Params: []string{upstreamName, text},
2188 }
2189 uc.produce(upstreamName, echoMsg, dc)
2190
2191 uc.updateChannelAutoDetach(upstreamName)
2192 }
2193 case "TAGMSG":
2194 var targetsStr string
2195 if err := parseMessageParams(msg, &targetsStr); err != nil {
2196 return err
2197 }
2198 tags := copyClientTags(msg.Tags)
2199
2200 for _, name := range strings.Split(targetsStr, ",") {
2201 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2202 dc.SendMessage(&irc.Message{
2203 Tags: msg.Tags.Copy(),
2204 Prefix: dc.prefix(),
2205 Command: "TAGMSG",
2206 Params: []string{name},
2207 })
2208 continue
2209 }
2210
2211 if casemapASCII(name) == serviceNickCM {
2212 continue
2213 }
2214
2215 uc, upstreamName, err := dc.unmarshalEntity(name)
2216 if err != nil {
2217 return err
2218 }
2219 if _, ok := uc.caps["message-tags"]; !ok {
2220 continue
2221 }
2222
2223 uc.SendMessageLabeled(dc.id, &irc.Message{
2224 Tags: tags,
2225 Command: "TAGMSG",
2226 Params: []string{upstreamName},
2227 })
2228
2229 uc.updateChannelAutoDetach(upstreamName)
2230 }
2231 case "INVITE":
2232 var user, channel string
2233 if err := parseMessageParams(msg, &user, &channel); err != nil {
2234 return err
2235 }
2236
2237 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
2238 if err != nil {
2239 return err
2240 }
2241
2242 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
2243 if err != nil {
2244 return err
2245 }
2246
2247 if ucChannel != ucUser {
2248 return ircError{&irc.Message{
2249 Command: irc.ERR_USERNOTINCHANNEL,
2250 Params: []string{dc.nick, user, channel, "They are on another network"},
2251 }}
2252 }
2253 uc := ucChannel
2254
2255 uc.SendMessageLabeled(dc.id, &irc.Message{
2256 Command: "INVITE",
2257 Params: []string{upstreamUser, upstreamChannel},
2258 })
2259 case "CHATHISTORY":
2260 var subcommand string
2261 if err := parseMessageParams(msg, &subcommand); err != nil {
2262 return err
2263 }
2264 var target, limitStr string
2265 var boundsStr [2]string
2266 switch subcommand {
2267 case "AFTER", "BEFORE":
2268 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &limitStr); err != nil {
2269 return err
2270 }
2271 case "BETWEEN":
2272 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2273 return err
2274 }
2275 case "TARGETS":
2276 if err := parseMessageParams(msg, nil, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2277 return err
2278 }
2279 default:
2280 // TODO: support LATEST, AROUND
2281 return ircError{&irc.Message{
2282 Command: "FAIL",
2283 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, "Unknown command"},
2284 }}
2285 }
2286
2287 // We don't save history for our service
2288 if casemapASCII(target) == serviceNickCM {
2289 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {})
2290 return nil
2291 }
2292
2293 store, ok := dc.user.msgStore.(chatHistoryMessageStore)
2294 if !ok {
2295 return ircError{&irc.Message{
2296 Command: irc.ERR_UNKNOWNCOMMAND,
2297 Params: []string{dc.nick, "CHATHISTORY", "Unknown command"},
2298 }}
2299 }
2300
2301 network, entity, err := dc.unmarshalEntityNetwork(target)
2302 if err != nil {
2303 return err
2304 }
2305 entity = network.casemap(entity)
2306
2307 // TODO: support msgid criteria
2308 var bounds [2]time.Time
2309 bounds[0] = parseChatHistoryBound(boundsStr[0])
2310 if bounds[0].IsZero() {
2311 return ircError{&irc.Message{
2312 Command: "FAIL",
2313 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[0], "Invalid first bound"},
2314 }}
2315 }
2316
2317 if boundsStr[1] != "" {
2318 bounds[1] = parseChatHistoryBound(boundsStr[1])
2319 if bounds[1].IsZero() {
2320 return ircError{&irc.Message{
2321 Command: "FAIL",
2322 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[1], "Invalid second bound"},
2323 }}
2324 }
2325 }
2326
2327 limit, err := strconv.Atoi(limitStr)
2328 if err != nil || limit < 0 || limit > dc.srv.HistoryLimit {
2329 return ircError{&irc.Message{
2330 Command: "FAIL",
2331 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, limitStr, "Invalid limit"},
2332 }}
2333 }
2334
2335 eventPlayback := dc.caps["draft/event-playback"]
2336
2337 var history []*irc.Message
2338 switch subcommand {
2339 case "BEFORE":
2340 history, err = store.LoadBeforeTime(network, entity, bounds[0], time.Time{}, limit, eventPlayback)
2341 case "AFTER":
2342 history, err = store.LoadAfterTime(network, entity, bounds[0], time.Now(), limit, eventPlayback)
2343 case "BETWEEN":
2344 if bounds[0].Before(bounds[1]) {
2345 history, err = store.LoadAfterTime(network, entity, bounds[0], bounds[1], limit, eventPlayback)
2346 } else {
2347 history, err = store.LoadBeforeTime(network, entity, bounds[0], bounds[1], limit, eventPlayback)
2348 }
2349 case "TARGETS":
2350 // TODO: support TARGETS in multi-upstream mode
2351 targets, err := store.ListTargets(network, bounds[0], bounds[1], limit, eventPlayback)
2352 if err != nil {
2353 dc.logger.Printf("failed fetching targets for chathistory: %v", err)
2354 return ircError{&irc.Message{
2355 Command: "FAIL",
2356 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, "Failed to retrieve targets"},
2357 }}
2358 }
2359
2360 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {
2361 for _, target := range targets {
2362 if ch := network.channels.Value(target.Name); ch != nil && ch.Detached {
2363 continue
2364 }
2365
2366 dc.SendMessage(&irc.Message{
2367 Tags: irc.Tags{"batch": batchRef},
2368 Prefix: dc.srv.prefix(),
2369 Command: "CHATHISTORY",
2370 Params: []string{"TARGETS", target.Name, target.LatestMessage.UTC().Format(serverTimeLayout)},
2371 })
2372 }
2373 })
2374
2375 return nil
2376 }
2377 if err != nil {
2378 dc.logger.Printf("failed fetching %q messages for chathistory: %v", target, err)
2379 return newChatHistoryError(subcommand, target)
2380 }
2381
2382 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {
2383 for _, msg := range history {
2384 msg.Tags["batch"] = batchRef
2385 dc.SendMessage(dc.marshalMessage(msg, network))
2386 }
2387 })
2388 case "BOUNCER":
2389 var subcommand string
2390 if err := parseMessageParams(msg, &subcommand); err != nil {
2391 return err
2392 }
2393
2394 switch strings.ToUpper(subcommand) {
2395 case "BIND":
2396 return ircError{&irc.Message{
2397 Command: "FAIL",
2398 Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind to a network after registration"},
2399 }}
2400 case "LISTNETWORKS":
2401 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
2402 dc.user.forEachNetwork(func(network *network) {
2403 idStr := fmt.Sprintf("%v", network.ID)
2404 attrs := getNetworkAttrs(network)
2405 dc.SendMessage(&irc.Message{
2406 Tags: irc.Tags{"batch": batchRef},
2407 Prefix: dc.srv.prefix(),
2408 Command: "BOUNCER",
2409 Params: []string{"NETWORK", idStr, attrs.String()},
2410 })
2411 })
2412 })
2413 case "ADDNETWORK":
2414 var attrsStr string
2415 if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
2416 return err
2417 }
2418 attrs := irc.ParseTags(attrsStr)
2419
2420 record := &Network{Nick: dc.nick, Enabled: true}
2421 if err := updateNetworkAttrs(record, attrs, subcommand); err != nil {
2422 return err
2423 }
2424
2425 if record.Nick == dc.user.Username {
2426 record.Nick = ""
2427 }
2428 if record.Realname == dc.user.Realname {
2429 record.Realname = ""
2430 }
2431
2432 network, err := dc.user.createNetwork(record)
2433 if err != nil {
2434 return ircError{&irc.Message{
2435 Command: "FAIL",
2436 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
2437 }}
2438 }
2439
2440 dc.SendMessage(&irc.Message{
2441 Prefix: dc.srv.prefix(),
2442 Command: "BOUNCER",
2443 Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
2444 })
2445 case "CHANGENETWORK":
2446 var idStr, attrsStr string
2447 if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
2448 return err
2449 }
2450 id, err := parseBouncerNetID(subcommand, idStr)
2451 if err != nil {
2452 return err
2453 }
2454 attrs := irc.ParseTags(attrsStr)
2455
2456 net := dc.user.getNetworkByID(id)
2457 if net == nil {
2458 return ircError{&irc.Message{
2459 Command: "FAIL",
2460 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2461 }}
2462 }
2463
2464 record := net.Network // copy network record because we'll mutate it
2465 if err := updateNetworkAttrs(&record, attrs, subcommand); err != nil {
2466 return err
2467 }
2468
2469 if record.Nick == dc.user.Username {
2470 record.Nick = ""
2471 }
2472 if record.Realname == dc.user.Realname {
2473 record.Realname = ""
2474 }
2475
2476 _, err = dc.user.updateNetwork(&record)
2477 if err != nil {
2478 return ircError{&irc.Message{
2479 Command: "FAIL",
2480 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
2481 }}
2482 }
2483
2484 dc.SendMessage(&irc.Message{
2485 Prefix: dc.srv.prefix(),
2486 Command: "BOUNCER",
2487 Params: []string{"CHANGENETWORK", idStr},
2488 })
2489 case "DELNETWORK":
2490 var idStr string
2491 if err := parseMessageParams(msg, nil, &idStr); err != nil {
2492 return err
2493 }
2494 id, err := parseBouncerNetID(subcommand, idStr)
2495 if err != nil {
2496 return err
2497 }
2498
2499 net := dc.user.getNetworkByID(id)
2500 if net == nil {
2501 return ircError{&irc.Message{
2502 Command: "FAIL",
2503 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2504 }}
2505 }
2506
2507 if err := dc.user.deleteNetwork(net.ID); err != nil {
2508 return err
2509 }
2510
2511 dc.SendMessage(&irc.Message{
2512 Prefix: dc.srv.prefix(),
2513 Command: "BOUNCER",
2514 Params: []string{"DELNETWORK", idStr},
2515 })
2516 default:
2517 return ircError{&irc.Message{
2518 Command: "FAIL",
2519 Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
2520 }}
2521 }
2522 default:
2523 dc.logger.Printf("unhandled message: %v", msg)
2524
2525 // Only forward unknown commands in single-upstream mode
2526 uc := dc.upstream()
2527 if uc == nil {
2528 return newUnknownCommandError(msg.Command)
2529 }
2530
2531 uc.SendMessageLabeled(dc.id, msg)
2532 }
2533 return nil
2534}
2535
2536func (dc *downstreamConn) handleNickServPRIVMSG(uc *upstreamConn, text string) {
2537 username, password, ok := parseNickServCredentials(text, uc.nick)
2538 if !ok {
2539 return
2540 }
2541
2542 // User may have e.g. EXTERNAL mechanism configured. We do not want to
2543 // automatically erase the key pair or any other credentials.
2544 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
2545 return
2546 }
2547
2548 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
2549 n := uc.network
2550 n.SASL.Mechanism = "PLAIN"
2551 n.SASL.Plain.Username = username
2552 n.SASL.Plain.Password = password
2553 if err := dc.srv.db.StoreNetwork(context.TODO(), dc.user.ID, &n.Network); err != nil {
2554 dc.logger.Printf("failed to save NickServ credentials: %v", err)
2555 }
2556}
2557
2558func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
2559 fields := strings.Fields(text)
2560 if len(fields) < 2 {
2561 return "", "", false
2562 }
2563 cmd := strings.ToUpper(fields[0])
2564 params := fields[1:]
2565 switch cmd {
2566 case "REGISTER":
2567 username = nick
2568 password = params[0]
2569 case "IDENTIFY":
2570 if len(params) == 1 {
2571 username = nick
2572 password = params[0]
2573 } else {
2574 username = params[0]
2575 password = params[1]
2576 }
2577 case "SET":
2578 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
2579 username = nick
2580 password = params[1]
2581 }
2582 default:
2583 return "", "", false
2584 }
2585 return username, password, true
2586}
Note: See TracBrowser for help on using the repository browser.