source: code/trunk/downstream.go@ 683

Last change on this file since 683 was 683, checked in by contact, 4 years ago

Add ELIST support in single-upstream mode

We just forward the command as-is, so we can pass down the ISUPPORT
token as well.

Closes: ​https://todo.sr.ht/~emersion/soju/148
File size: 65.0 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(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 "ELIST": true,
223 "EXCEPTS": true,
224 "EXTBAN": true,
225 "HOSTLEN": true,
226 "INVEX": true,
227 "KICKLEN": true,
228 "MAXLIST": true,
229 "MAXTARGETS": true,
230 "MODES": true,
231 "NAMELEN": true,
232 "NETWORK": true,
233 "NICKLEN": true,
234 "PREFIX": true,
235 "SAFELIST": true,
236 "TARGMAX": true,
237 "TOPICLEN": true,
238 "USERLEN": true,
239 "UTF8ONLY": true,
240 "WHOX": true,
241}
242
243type downstreamConn struct {
244 conn
245
246 id uint64
247
248 registered bool
249 user *user
250 nick string
251 nickCM string
252 rawUsername string
253 networkName string
254 clientName string
255 realname string
256 hostname string
257 password string // empty after authentication
258 network *network // can be nil
259
260 negotiatingCaps bool
261 capVersion int
262 supportedCaps map[string]string
263 caps map[string]bool
264
265 lastBatchRef uint64
266
267 saslServer sasl.Server
268}
269
270func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
271 remoteAddr := ic.RemoteAddr().String()
272 logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
273 options := connOptions{Logger: logger}
274 dc := &downstreamConn{
275 conn: *newConn(srv, ic, &options),
276 id: id,
277 supportedCaps: make(map[string]string),
278 caps: make(map[string]bool),
279 }
280 dc.hostname = remoteAddr
281 if host, _, err := net.SplitHostPort(dc.hostname); err == nil {
282 dc.hostname = host
283 }
284 for k, v := range permanentDownstreamCaps {
285 dc.supportedCaps[k] = v
286 }
287 if srv.LogPath != "" {
288 dc.supportedCaps["draft/chathistory"] = ""
289 }
290 return dc
291}
292
293func (dc *downstreamConn) prefix() *irc.Prefix {
294 return &irc.Prefix{
295 Name: dc.nick,
296 User: dc.user.Username,
297 Host: dc.hostname,
298 }
299}
300
301func (dc *downstreamConn) forEachNetwork(f func(*network)) {
302 if dc.network != nil {
303 f(dc.network)
304 } else if !dc.caps["soju.im/bouncer-networks"] {
305 dc.user.forEachNetwork(f)
306 }
307}
308
309func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
310 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
311 return
312 }
313 dc.user.forEachUpstream(func(uc *upstreamConn) {
314 if dc.network != nil && uc.network != dc.network {
315 return
316 }
317 f(uc)
318 })
319}
320
321// upstream returns the upstream connection, if any. If there are zero or if
322// there are multiple upstream connections, it returns nil.
323func (dc *downstreamConn) upstream() *upstreamConn {
324 if dc.network == nil {
325 return nil
326 }
327 return dc.network.conn
328}
329
330func isOurNick(net *network, nick string) bool {
331 // TODO: this doesn't account for nick changes
332 if net.conn != nil {
333 return net.casemap(nick) == net.conn.nickCM
334 }
335 // We're not currently connected to the upstream connection, so we don't
336 // know whether this name is our nickname. Best-effort: use the network's
337 // configured nickname and hope it was the one being used when we were
338 // connected.
339 return net.casemap(nick) == net.casemap(GetNick(&net.user.User, &net.Network))
340}
341
342// marshalEntity converts an upstream entity name (ie. channel or nick) into a
343// downstream entity name.
344//
345// This involves adding a "/<network>" suffix if the entity isn't the current
346// user.
347func (dc *downstreamConn) marshalEntity(net *network, name string) string {
348 if isOurNick(net, name) {
349 return dc.nick
350 }
351 name = partialCasemap(net.casemap, name)
352 if dc.network != nil {
353 if dc.network != net {
354 panic("soju: tried to marshal an entity for another network")
355 }
356 return name
357 }
358 return name + "/" + net.GetName()
359}
360
361func (dc *downstreamConn) marshalUserPrefix(net *network, prefix *irc.Prefix) *irc.Prefix {
362 if isOurNick(net, prefix.Name) {
363 return dc.prefix()
364 }
365 prefix.Name = partialCasemap(net.casemap, prefix.Name)
366 if dc.network != nil {
367 if dc.network != net {
368 panic("soju: tried to marshal a user prefix for another network")
369 }
370 return prefix
371 }
372 return &irc.Prefix{
373 Name: prefix.Name + "/" + net.GetName(),
374 User: prefix.User,
375 Host: prefix.Host,
376 }
377}
378
379// unmarshalEntityNetwork converts a downstream entity name (ie. channel or
380// nick) into an upstream entity name.
381//
382// This involves removing the "/<network>" suffix.
383func (dc *downstreamConn) unmarshalEntityNetwork(name string) (*network, string, error) {
384 if dc.network != nil {
385 return dc.network, name, nil
386 }
387
388 var net *network
389 if i := strings.LastIndexByte(name, '/'); i >= 0 {
390 network := name[i+1:]
391 name = name[:i]
392
393 for _, n := range dc.user.networks {
394 if network == n.GetName() {
395 net = n
396 break
397 }
398 }
399 }
400
401 if net == nil {
402 return nil, "", ircError{&irc.Message{
403 Command: irc.ERR_NOSUCHCHANNEL,
404 Params: []string{name, "Missing network suffix in name"},
405 }}
406 }
407
408 return net, name, nil
409}
410
411// unmarshalEntity is the same as unmarshalEntityNetwork, but returns the
412// upstream connection and fails if the upstream is disconnected.
413func (dc *downstreamConn) unmarshalEntity(name string) (*upstreamConn, string, error) {
414 net, name, err := dc.unmarshalEntityNetwork(name)
415 if err != nil {
416 return nil, "", err
417 }
418
419 if net.conn == nil {
420 return nil, "", ircError{&irc.Message{
421 Command: irc.ERR_NOSUCHCHANNEL,
422 Params: []string{name, "Disconnected from upstream network"},
423 }}
424 }
425
426 return net.conn, name, nil
427}
428
429func (dc *downstreamConn) unmarshalText(uc *upstreamConn, text string) string {
430 if dc.upstream() != nil {
431 return text
432 }
433 // TODO: smarter parsing that ignores URLs
434 return strings.ReplaceAll(text, "/"+uc.network.GetName(), "")
435}
436
437func (dc *downstreamConn) readMessages(ch chan<- event) error {
438 for {
439 msg, err := dc.ReadMessage()
440 if errors.Is(err, io.EOF) {
441 break
442 } else if err != nil {
443 return fmt.Errorf("failed to read IRC command: %v", err)
444 }
445
446 ch <- eventDownstreamMessage{msg, dc}
447 }
448
449 return nil
450}
451
452// SendMessage sends an outgoing message.
453//
454// This can only called from the user goroutine.
455func (dc *downstreamConn) SendMessage(msg *irc.Message) {
456 if !dc.caps["message-tags"] {
457 if msg.Command == "TAGMSG" {
458 return
459 }
460 msg = msg.Copy()
461 for name := range msg.Tags {
462 supported := false
463 switch name {
464 case "time":
465 supported = dc.caps["server-time"]
466 case "account":
467 supported = dc.caps["account"]
468 }
469 if !supported {
470 delete(msg.Tags, name)
471 }
472 }
473 }
474 if !dc.caps["batch"] && msg.Tags["batch"] != "" {
475 msg = msg.Copy()
476 delete(msg.Tags, "batch")
477 }
478 if msg.Command == "JOIN" && !dc.caps["extended-join"] {
479 msg.Params = msg.Params[:1]
480 }
481 if msg.Command == "SETNAME" && !dc.caps["setname"] {
482 return
483 }
484 if msg.Command == "AWAY" && !dc.caps["away-notify"] {
485 return
486 }
487 if msg.Command == "ACCOUNT" && !dc.caps["account-notify"] {
488 return
489 }
490
491 dc.conn.SendMessage(msg)
492}
493
494func (dc *downstreamConn) SendBatch(typ string, params []string, tags irc.Tags, f func(batchRef irc.TagValue)) {
495 dc.lastBatchRef++
496 ref := fmt.Sprintf("%v", dc.lastBatchRef)
497
498 if dc.caps["batch"] {
499 dc.SendMessage(&irc.Message{
500 Tags: tags,
501 Prefix: dc.srv.prefix(),
502 Command: "BATCH",
503 Params: append([]string{"+" + ref, typ}, params...),
504 })
505 }
506
507 f(irc.TagValue(ref))
508
509 if dc.caps["batch"] {
510 dc.SendMessage(&irc.Message{
511 Prefix: dc.srv.prefix(),
512 Command: "BATCH",
513 Params: []string{"-" + ref},
514 })
515 }
516}
517
518// sendMessageWithID sends an outgoing message with the specified internal ID.
519func (dc *downstreamConn) sendMessageWithID(msg *irc.Message, id string) {
520 dc.SendMessage(msg)
521
522 if id == "" || !dc.messageSupportsBacklog(msg) {
523 return
524 }
525
526 dc.sendPing(id)
527}
528
529// advanceMessageWithID advances history to the specified message ID without
530// sending a message. This is useful e.g. for self-messages when echo-message
531// isn't enabled.
532func (dc *downstreamConn) advanceMessageWithID(msg *irc.Message, id string) {
533 if id == "" || !dc.messageSupportsBacklog(msg) {
534 return
535 }
536
537 dc.sendPing(id)
538}
539
540// ackMsgID acknowledges that a message has been received.
541func (dc *downstreamConn) ackMsgID(id string) {
542 netID, entity, err := parseMsgID(id, nil)
543 if err != nil {
544 dc.logger.Printf("failed to ACK message ID %q: %v", id, err)
545 return
546 }
547
548 network := dc.user.getNetworkByID(netID)
549 if network == nil {
550 return
551 }
552
553 network.delivered.StoreID(entity, dc.clientName, id)
554}
555
556func (dc *downstreamConn) sendPing(msgID string) {
557 token := "soju-msgid-" + msgID
558 dc.SendMessage(&irc.Message{
559 Command: "PING",
560 Params: []string{token},
561 })
562}
563
564func (dc *downstreamConn) handlePong(token string) {
565 if !strings.HasPrefix(token, "soju-msgid-") {
566 dc.logger.Printf("received unrecognized PONG token %q", token)
567 return
568 }
569 msgID := strings.TrimPrefix(token, "soju-msgid-")
570 dc.ackMsgID(msgID)
571}
572
573// marshalMessage re-formats a message coming from an upstream connection so
574// that it's suitable for being sent on this downstream connection. Only
575// messages that may appear in logs are supported, except MODE messages which
576// may only appear in single-upstream mode.
577func (dc *downstreamConn) marshalMessage(msg *irc.Message, net *network) *irc.Message {
578 if dc.network != nil {
579 return msg
580 }
581
582 msg = msg.Copy()
583 msg.Prefix = dc.marshalUserPrefix(net, msg.Prefix)
584
585 switch msg.Command {
586 case "PRIVMSG", "NOTICE", "TAGMSG":
587 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
588 case "NICK":
589 // Nick change for another user
590 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
591 case "JOIN", "PART":
592 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
593 case "KICK":
594 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
595 msg.Params[1] = dc.marshalEntity(net, msg.Params[1])
596 case "TOPIC":
597 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
598 case "QUIT", "SETNAME":
599 // This space is intentionally left blank
600 default:
601 panic(fmt.Sprintf("unexpected %q message", msg.Command))
602 }
603
604 return msg
605}
606
607func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
608 switch msg.Command {
609 case "QUIT":
610 return dc.Close()
611 default:
612 if dc.registered {
613 return dc.handleMessageRegistered(msg)
614 } else {
615 return dc.handleMessageUnregistered(msg)
616 }
617 }
618}
619
620func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
621 switch msg.Command {
622 case "NICK":
623 var nick string
624 if err := parseMessageParams(msg, &nick); err != nil {
625 return err
626 }
627 if strings.ContainsAny(nick, illegalNickChars) {
628 return ircError{&irc.Message{
629 Command: irc.ERR_ERRONEUSNICKNAME,
630 Params: []string{dc.nick, nick, "contains illegal characters"},
631 }}
632 }
633 nickCM := casemapASCII(nick)
634 if nickCM == serviceNickCM {
635 return ircError{&irc.Message{
636 Command: irc.ERR_NICKNAMEINUSE,
637 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
638 }}
639 }
640 dc.nick = nick
641 dc.nickCM = nickCM
642 case "USER":
643 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
644 return err
645 }
646 case "PASS":
647 if err := parseMessageParams(msg, &dc.password); err != nil {
648 return err
649 }
650 case "CAP":
651 var subCmd string
652 if err := parseMessageParams(msg, &subCmd); err != nil {
653 return err
654 }
655 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
656 return err
657 }
658 case "AUTHENTICATE":
659 if !dc.caps["sasl"] {
660 return ircError{&irc.Message{
661 Command: irc.ERR_SASLFAIL,
662 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
663 }}
664 }
665 if len(msg.Params) == 0 {
666 return ircError{&irc.Message{
667 Command: irc.ERR_SASLFAIL,
668 Params: []string{"*", "Missing AUTHENTICATE argument"},
669 }}
670 }
671 if dc.nick == "" {
672 return ircError{&irc.Message{
673 Command: irc.ERR_SASLFAIL,
674 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
675 }}
676 }
677
678 var resp []byte
679 if msg.Params[0] == "*" {
680 dc.saslServer = nil
681 return ircError{&irc.Message{
682 Command: irc.ERR_SASLABORTED,
683 Params: []string{"*", "SASL authentication aborted"},
684 }}
685 } else if dc.saslServer == nil {
686 mech := strings.ToUpper(msg.Params[0])
687 switch mech {
688 case "PLAIN":
689 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
690 return dc.authenticate(username, password)
691 }))
692 default:
693 return ircError{&irc.Message{
694 Command: irc.ERR_SASLFAIL,
695 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
696 }}
697 }
698 } else if msg.Params[0] == "+" {
699 resp = nil
700 } else {
701 // TODO: multi-line messages
702 var err error
703 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
704 if err != nil {
705 dc.saslServer = nil
706 return ircError{&irc.Message{
707 Command: irc.ERR_SASLFAIL,
708 Params: []string{"*", "Invalid base64-encoded response"},
709 }}
710 }
711 }
712
713 challenge, done, err := dc.saslServer.Next(resp)
714 if err != nil {
715 dc.saslServer = nil
716 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
717 return ircError{&irc.Message{
718 Command: irc.ERR_SASLFAIL,
719 Params: []string{"*", ircErr.Message.Params[1]},
720 }}
721 }
722 dc.SendMessage(&irc.Message{
723 Prefix: dc.srv.prefix(),
724 Command: irc.ERR_SASLFAIL,
725 Params: []string{"*", "SASL error"},
726 })
727 return fmt.Errorf("SASL authentication failed: %v", err)
728 } else if done {
729 dc.saslServer = nil
730 dc.SendMessage(&irc.Message{
731 Prefix: dc.srv.prefix(),
732 Command: irc.RPL_LOGGEDIN,
733 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
734 })
735 dc.SendMessage(&irc.Message{
736 Prefix: dc.srv.prefix(),
737 Command: irc.RPL_SASLSUCCESS,
738 Params: []string{dc.nick, "SASL authentication successful"},
739 })
740 } else {
741 challengeStr := "+"
742 if len(challenge) > 0 {
743 challengeStr = base64.StdEncoding.EncodeToString(challenge)
744 }
745
746 // TODO: multi-line messages
747 dc.SendMessage(&irc.Message{
748 Prefix: dc.srv.prefix(),
749 Command: "AUTHENTICATE",
750 Params: []string{challengeStr},
751 })
752 }
753 case "BOUNCER":
754 var subcommand string
755 if err := parseMessageParams(msg, &subcommand); err != nil {
756 return err
757 }
758
759 switch strings.ToUpper(subcommand) {
760 case "BIND":
761 var idStr string
762 if err := parseMessageParams(msg, nil, &idStr); err != nil {
763 return err
764 }
765
766 if dc.user == nil {
767 return ircError{&irc.Message{
768 Command: "FAIL",
769 Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
770 }}
771 }
772
773 id, err := parseBouncerNetID(subcommand, idStr)
774 if err != nil {
775 return err
776 }
777
778 var match *network
779 dc.user.forEachNetwork(func(net *network) {
780 if net.ID == id {
781 match = net
782 }
783 })
784 if match == nil {
785 return ircError{&irc.Message{
786 Command: "FAIL",
787 Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
788 }}
789 }
790
791 dc.networkName = match.GetName()
792 }
793 default:
794 dc.logger.Printf("unhandled message: %v", msg)
795 return newUnknownCommandError(msg.Command)
796 }
797 if dc.rawUsername != "" && dc.nick != "" && !dc.negotiatingCaps {
798 return dc.register()
799 }
800 return nil
801}
802
803func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
804 cmd = strings.ToUpper(cmd)
805
806 replyTo := dc.nick
807 if !dc.registered {
808 replyTo = "*"
809 }
810
811 switch cmd {
812 case "LS":
813 if len(args) > 0 {
814 var err error
815 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
816 return err
817 }
818 }
819 if !dc.registered && dc.capVersion >= 302 {
820 // Let downstream show everything it supports, and trim
821 // down the available capabilities when upstreams are
822 // known.
823 for k, v := range needAllDownstreamCaps {
824 dc.supportedCaps[k] = v
825 }
826 }
827
828 caps := make([]string, 0, len(dc.supportedCaps))
829 for k, v := range dc.supportedCaps {
830 if dc.capVersion >= 302 && v != "" {
831 caps = append(caps, k+"="+v)
832 } else {
833 caps = append(caps, k)
834 }
835 }
836
837 // TODO: multi-line replies
838 dc.SendMessage(&irc.Message{
839 Prefix: dc.srv.prefix(),
840 Command: "CAP",
841 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
842 })
843
844 if dc.capVersion >= 302 {
845 // CAP version 302 implicitly enables cap-notify
846 dc.caps["cap-notify"] = true
847 }
848
849 if !dc.registered {
850 dc.negotiatingCaps = true
851 }
852 case "LIST":
853 var caps []string
854 for name, enabled := range dc.caps {
855 if enabled {
856 caps = append(caps, name)
857 }
858 }
859
860 // TODO: multi-line replies
861 dc.SendMessage(&irc.Message{
862 Prefix: dc.srv.prefix(),
863 Command: "CAP",
864 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
865 })
866 case "REQ":
867 if len(args) == 0 {
868 return ircError{&irc.Message{
869 Command: err_invalidcapcmd,
870 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
871 }}
872 }
873
874 // TODO: atomically ack/nak the whole capability set
875 caps := strings.Fields(args[0])
876 ack := true
877 for _, name := range caps {
878 name = strings.ToLower(name)
879 enable := !strings.HasPrefix(name, "-")
880 if !enable {
881 name = strings.TrimPrefix(name, "-")
882 }
883
884 if enable == dc.caps[name] {
885 continue
886 }
887
888 _, ok := dc.supportedCaps[name]
889 if !ok {
890 ack = false
891 break
892 }
893
894 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
895 // cap-notify cannot be disabled with CAP version 302
896 ack = false
897 break
898 }
899
900 dc.caps[name] = enable
901 }
902
903 reply := "NAK"
904 if ack {
905 reply = "ACK"
906 }
907 dc.SendMessage(&irc.Message{
908 Prefix: dc.srv.prefix(),
909 Command: "CAP",
910 Params: []string{replyTo, reply, args[0]},
911 })
912
913 if !dc.registered {
914 dc.negotiatingCaps = true
915 }
916 case "END":
917 dc.negotiatingCaps = false
918 default:
919 return ircError{&irc.Message{
920 Command: err_invalidcapcmd,
921 Params: []string{replyTo, cmd, "Unknown CAP command"},
922 }}
923 }
924 return nil
925}
926
927func (dc *downstreamConn) setSupportedCap(name, value string) {
928 prevValue, hasPrev := dc.supportedCaps[name]
929 changed := !hasPrev || prevValue != value
930 dc.supportedCaps[name] = value
931
932 if !dc.caps["cap-notify"] || !changed {
933 return
934 }
935
936 replyTo := dc.nick
937 if !dc.registered {
938 replyTo = "*"
939 }
940
941 cap := name
942 if value != "" && dc.capVersion >= 302 {
943 cap = name + "=" + value
944 }
945
946 dc.SendMessage(&irc.Message{
947 Prefix: dc.srv.prefix(),
948 Command: "CAP",
949 Params: []string{replyTo, "NEW", cap},
950 })
951}
952
953func (dc *downstreamConn) unsetSupportedCap(name string) {
954 _, hasPrev := dc.supportedCaps[name]
955 delete(dc.supportedCaps, name)
956 delete(dc.caps, name)
957
958 if !dc.caps["cap-notify"] || !hasPrev {
959 return
960 }
961
962 replyTo := dc.nick
963 if !dc.registered {
964 replyTo = "*"
965 }
966
967 dc.SendMessage(&irc.Message{
968 Prefix: dc.srv.prefix(),
969 Command: "CAP",
970 Params: []string{replyTo, "DEL", name},
971 })
972}
973
974func (dc *downstreamConn) updateSupportedCaps() {
975 supportedCaps := make(map[string]bool)
976 for cap := range needAllDownstreamCaps {
977 supportedCaps[cap] = true
978 }
979 dc.forEachUpstream(func(uc *upstreamConn) {
980 for cap, supported := range supportedCaps {
981 supportedCaps[cap] = supported && uc.caps[cap]
982 }
983 })
984
985 for cap, supported := range supportedCaps {
986 if supported {
987 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
988 } else {
989 dc.unsetSupportedCap(cap)
990 }
991 }
992
993 if dc.srv.LogPath != "" && dc.network != nil {
994 dc.setSupportedCap("draft/event-playback", "")
995 } else {
996 dc.unsetSupportedCap("draft/event-playback")
997 }
998}
999
1000func (dc *downstreamConn) updateNick() {
1001 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
1002 dc.SendMessage(&irc.Message{
1003 Prefix: dc.prefix(),
1004 Command: "NICK",
1005 Params: []string{uc.nick},
1006 })
1007 dc.nick = uc.nick
1008 dc.nickCM = casemapASCII(dc.nick)
1009 }
1010}
1011
1012func (dc *downstreamConn) updateRealname() {
1013 if uc := dc.upstream(); uc != nil && uc.realname != dc.realname && dc.caps["setname"] {
1014 dc.SendMessage(&irc.Message{
1015 Prefix: dc.prefix(),
1016 Command: "SETNAME",
1017 Params: []string{uc.realname},
1018 })
1019 dc.realname = uc.realname
1020 }
1021}
1022
1023func sanityCheckServer(addr string) error {
1024 dialer := net.Dialer{Timeout: 30 * time.Second}
1025 conn, err := tls.DialWithDialer(&dialer, "tcp", addr, nil)
1026 if err != nil {
1027 return err
1028 }
1029 return conn.Close()
1030}
1031
1032func unmarshalUsername(rawUsername string) (username, client, network string) {
1033 username = rawUsername
1034
1035 i := strings.IndexAny(username, "/@")
1036 j := strings.LastIndexAny(username, "/@")
1037 if i >= 0 {
1038 username = rawUsername[:i]
1039 }
1040 if j >= 0 {
1041 if rawUsername[j] == '@' {
1042 client = rawUsername[j+1:]
1043 } else {
1044 network = rawUsername[j+1:]
1045 }
1046 }
1047 if i >= 0 && j >= 0 && i < j {
1048 if rawUsername[i] == '@' {
1049 client = rawUsername[i+1 : j]
1050 } else {
1051 network = rawUsername[i+1 : j]
1052 }
1053 }
1054
1055 return username, client, network
1056}
1057
1058func (dc *downstreamConn) authenticate(username, password string) error {
1059 username, clientName, networkName := unmarshalUsername(username)
1060
1061 u, err := dc.srv.db.GetUser(context.TODO(), username)
1062 if err != nil {
1063 dc.logger.Printf("failed authentication for %q: user not found: %v", username, err)
1064 return errAuthFailed
1065 }
1066
1067 // Password auth disabled
1068 if u.Password == "" {
1069 return errAuthFailed
1070 }
1071
1072 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
1073 if err != nil {
1074 dc.logger.Printf("failed authentication for %q: wrong password: %v", username, err)
1075 return errAuthFailed
1076 }
1077
1078 dc.user = dc.srv.getUser(username)
1079 if dc.user == nil {
1080 dc.logger.Printf("failed authentication for %q: user not active", username)
1081 return errAuthFailed
1082 }
1083 dc.clientName = clientName
1084 dc.networkName = networkName
1085 return nil
1086}
1087
1088func (dc *downstreamConn) register() error {
1089 if dc.registered {
1090 return fmt.Errorf("tried to register twice")
1091 }
1092
1093 password := dc.password
1094 dc.password = ""
1095 if dc.user == nil {
1096 if err := dc.authenticate(dc.rawUsername, password); err != nil {
1097 return err
1098 }
1099 }
1100
1101 if dc.clientName == "" && dc.networkName == "" {
1102 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
1103 }
1104
1105 dc.registered = true
1106 dc.logger.Printf("registration complete for user %q", dc.user.Username)
1107 return nil
1108}
1109
1110func (dc *downstreamConn) loadNetwork() error {
1111 if dc.networkName == "" {
1112 return nil
1113 }
1114
1115 network := dc.user.getNetwork(dc.networkName)
1116 if network == nil {
1117 addr := dc.networkName
1118 if !strings.ContainsRune(addr, ':') {
1119 addr = addr + ":6697"
1120 }
1121
1122 dc.logger.Printf("trying to connect to new network %q", addr)
1123 if err := sanityCheckServer(addr); err != nil {
1124 dc.logger.Printf("failed to connect to %q: %v", addr, err)
1125 return ircError{&irc.Message{
1126 Command: irc.ERR_PASSWDMISMATCH,
1127 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
1128 }}
1129 }
1130
1131 // Some clients only allow specifying the nickname (and use the
1132 // nickname as a username too). Strip the network name from the
1133 // nickname when auto-saving networks.
1134 nick, _, _ := unmarshalUsername(dc.nick)
1135
1136 dc.logger.Printf("auto-saving network %q", dc.networkName)
1137 var err error
1138 network, err = dc.user.createNetwork(context.TODO(), &Network{
1139 Addr: dc.networkName,
1140 Nick: nick,
1141 Enabled: true,
1142 })
1143 if err != nil {
1144 return err
1145 }
1146 }
1147
1148 dc.network = network
1149 return nil
1150}
1151
1152func (dc *downstreamConn) welcome() error {
1153 if dc.user == nil || !dc.registered {
1154 panic("tried to welcome an unregistered connection")
1155 }
1156
1157 // TODO: doing this might take some time. We should do it in dc.register
1158 // instead, but we'll potentially be adding a new network and this must be
1159 // done in the user goroutine.
1160 if err := dc.loadNetwork(); err != nil {
1161 return err
1162 }
1163
1164 isupport := []string{
1165 fmt.Sprintf("CHATHISTORY=%v", chatHistoryLimit),
1166 "CASEMAPPING=ascii",
1167 }
1168
1169 if dc.network != nil {
1170 isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
1171 }
1172 if dc.network == nil && dc.srv.Title != "" {
1173 isupport = append(isupport, "NETWORK="+encodeISUPPORT(dc.srv.Title))
1174 }
1175 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
1176 isupport = append(isupport, "WHOX")
1177 }
1178
1179 if uc := dc.upstream(); uc != nil {
1180 for k := range passthroughIsupport {
1181 v, ok := uc.isupport[k]
1182 if !ok {
1183 continue
1184 }
1185 if v != nil {
1186 isupport = append(isupport, fmt.Sprintf("%v=%v", k, *v))
1187 } else {
1188 isupport = append(isupport, k)
1189 }
1190 }
1191 }
1192
1193 dc.SendMessage(&irc.Message{
1194 Prefix: dc.srv.prefix(),
1195 Command: irc.RPL_WELCOME,
1196 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
1197 })
1198 dc.SendMessage(&irc.Message{
1199 Prefix: dc.srv.prefix(),
1200 Command: irc.RPL_YOURHOST,
1201 Params: []string{dc.nick, "Your host is " + dc.srv.Hostname},
1202 })
1203 dc.SendMessage(&irc.Message{
1204 Prefix: dc.srv.prefix(),
1205 Command: irc.RPL_MYINFO,
1206 Params: []string{dc.nick, dc.srv.Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
1207 })
1208 for _, msg := range generateIsupport(dc.srv.prefix(), dc.nick, isupport) {
1209 dc.SendMessage(msg)
1210 }
1211 if uc := dc.upstream(); uc != nil {
1212 dc.SendMessage(&irc.Message{
1213 Prefix: dc.srv.prefix(),
1214 Command: irc.RPL_UMODEIS,
1215 Params: []string{dc.nick, "+" + string(uc.modes)},
1216 })
1217 }
1218 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] && dc.user.Admin {
1219 dc.SendMessage(&irc.Message{
1220 Prefix: dc.srv.prefix(),
1221 Command: irc.RPL_UMODEIS,
1222 Params: []string{dc.nick, "+o"},
1223 })
1224 }
1225
1226 if motd := dc.user.srv.MOTD(); motd != "" && dc.network == nil {
1227 for _, msg := range generateMOTD(dc.srv.prefix(), dc.nick, motd) {
1228 dc.SendMessage(msg)
1229 }
1230 } else {
1231 motdHint := "No MOTD"
1232 if dc.network != nil {
1233 motdHint = "Use /motd to read the message of the day"
1234 }
1235 dc.SendMessage(&irc.Message{
1236 Prefix: dc.srv.prefix(),
1237 Command: irc.ERR_NOMOTD,
1238 Params: []string{dc.nick, motdHint},
1239 })
1240 }
1241
1242 dc.updateNick()
1243 dc.updateRealname()
1244 dc.updateSupportedCaps()
1245
1246 if dc.caps["soju.im/bouncer-networks-notify"] {
1247 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
1248 dc.user.forEachNetwork(func(network *network) {
1249 idStr := fmt.Sprintf("%v", network.ID)
1250 attrs := getNetworkAttrs(network)
1251 dc.SendMessage(&irc.Message{
1252 Tags: irc.Tags{"batch": batchRef},
1253 Prefix: dc.srv.prefix(),
1254 Command: "BOUNCER",
1255 Params: []string{"NETWORK", idStr, attrs.String()},
1256 })
1257 })
1258 })
1259 }
1260
1261 dc.forEachUpstream(func(uc *upstreamConn) {
1262 for _, entry := range uc.channels.innerMap {
1263 ch := entry.value.(*upstreamChannel)
1264 if !ch.complete {
1265 continue
1266 }
1267 record := uc.network.channels.Value(ch.Name)
1268 if record != nil && record.Detached {
1269 continue
1270 }
1271
1272 dc.SendMessage(&irc.Message{
1273 Prefix: dc.prefix(),
1274 Command: "JOIN",
1275 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
1276 })
1277
1278 forwardChannel(dc, ch)
1279 }
1280 })
1281
1282 dc.forEachNetwork(func(net *network) {
1283 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1284 return
1285 }
1286
1287 // Only send history if we're the first connected client with that name
1288 // for the network
1289 firstClient := true
1290 dc.user.forEachDownstream(func(c *downstreamConn) {
1291 if c != dc && c.clientName == dc.clientName && c.network == dc.network {
1292 firstClient = false
1293 }
1294 })
1295 if firstClient {
1296 net.delivered.ForEachTarget(func(target string) {
1297 lastDelivered := net.delivered.LoadID(target, dc.clientName)
1298 if lastDelivered == "" {
1299 return
1300 }
1301
1302 dc.sendTargetBacklog(net, target, lastDelivered)
1303
1304 // Fast-forward history to last message
1305 targetCM := net.casemap(target)
1306 lastID, err := dc.user.msgStore.LastMsgID(&net.Network, targetCM, time.Now())
1307 if err != nil {
1308 dc.logger.Printf("failed to get last message ID: %v", err)
1309 return
1310 }
1311 net.delivered.StoreID(target, dc.clientName, lastID)
1312 })
1313 }
1314 })
1315
1316 return nil
1317}
1318
1319// messageSupportsBacklog checks whether the provided message can be sent as
1320// part of an history batch.
1321func (dc *downstreamConn) messageSupportsBacklog(msg *irc.Message) bool {
1322 // Don't replay all messages, because that would mess up client
1323 // state. For instance we just sent the list of users, sending
1324 // PART messages for one of these users would be incorrect.
1325 switch msg.Command {
1326 case "PRIVMSG", "NOTICE":
1327 return true
1328 }
1329 return false
1330}
1331
1332func (dc *downstreamConn) sendTargetBacklog(net *network, target, msgID string) {
1333 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1334 return
1335 }
1336
1337 ch := net.channels.Value(target)
1338
1339 ctx, cancel := context.WithTimeout(context.TODO(), backlogTimeout)
1340 defer cancel()
1341
1342 targetCM := net.casemap(target)
1343 history, err := dc.user.msgStore.LoadLatestID(ctx, &net.Network, targetCM, msgID, backlogLimit)
1344 if err != nil {
1345 dc.logger.Printf("failed to send backlog for %q: %v", target, err)
1346 return
1347 }
1348
1349 dc.SendBatch("chathistory", []string{dc.marshalEntity(net, target)}, nil, func(batchRef irc.TagValue) {
1350 for _, msg := range history {
1351 if ch != nil && ch.Detached {
1352 if net.detachedMessageNeedsRelay(ch, msg) {
1353 dc.relayDetachedMessage(net, msg)
1354 }
1355 } else {
1356 msg.Tags["batch"] = batchRef
1357 dc.SendMessage(dc.marshalMessage(msg, net))
1358 }
1359 }
1360 })
1361}
1362
1363func (dc *downstreamConn) relayDetachedMessage(net *network, msg *irc.Message) {
1364 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
1365 return
1366 }
1367
1368 sender := msg.Prefix.Name
1369 target, text := msg.Params[0], msg.Params[1]
1370 if net.isHighlight(msg) {
1371 sendServiceNOTICE(dc, fmt.Sprintf("highlight in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1372 } else {
1373 sendServiceNOTICE(dc, fmt.Sprintf("message in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1374 }
1375}
1376
1377func (dc *downstreamConn) runUntilRegistered() error {
1378 for !dc.registered {
1379 msg, err := dc.ReadMessage()
1380 if err != nil {
1381 return fmt.Errorf("failed to read IRC command: %w", err)
1382 }
1383
1384 err = dc.handleMessage(msg)
1385 if ircErr, ok := err.(ircError); ok {
1386 ircErr.Message.Prefix = dc.srv.prefix()
1387 dc.SendMessage(ircErr.Message)
1388 } else if err != nil {
1389 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
1390 }
1391 }
1392
1393 return nil
1394}
1395
1396func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
1397 ctx, cancel := context.WithTimeout(context.TODO(), handleDownstreamMessageTimeout)
1398 defer cancel()
1399
1400 switch msg.Command {
1401 case "CAP":
1402 var subCmd string
1403 if err := parseMessageParams(msg, &subCmd); err != nil {
1404 return err
1405 }
1406 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
1407 return err
1408 }
1409 case "PING":
1410 var source, destination string
1411 if err := parseMessageParams(msg, &source); err != nil {
1412 return err
1413 }
1414 if len(msg.Params) > 1 {
1415 destination = msg.Params[1]
1416 }
1417 if destination != "" && destination != dc.srv.Hostname {
1418 return ircError{&irc.Message{
1419 Command: irc.ERR_NOSUCHSERVER,
1420 Params: []string{dc.nick, destination, "No such server"},
1421 }}
1422 }
1423 dc.SendMessage(&irc.Message{
1424 Prefix: dc.srv.prefix(),
1425 Command: "PONG",
1426 Params: []string{dc.srv.Hostname, source},
1427 })
1428 return nil
1429 case "PONG":
1430 if len(msg.Params) == 0 {
1431 return newNeedMoreParamsError(msg.Command)
1432 }
1433 token := msg.Params[len(msg.Params)-1]
1434 dc.handlePong(token)
1435 case "USER":
1436 return ircError{&irc.Message{
1437 Command: irc.ERR_ALREADYREGISTERED,
1438 Params: []string{dc.nick, "You may not reregister"},
1439 }}
1440 case "NICK":
1441 var rawNick string
1442 if err := parseMessageParams(msg, &rawNick); err != nil {
1443 return err
1444 }
1445
1446 nick := rawNick
1447 var upstream *upstreamConn
1448 if dc.upstream() == nil {
1449 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
1450 if err == nil { // NICK nick/network: NICK only on a specific upstream
1451 upstream = uc
1452 nick = unmarshaledNick
1453 }
1454 }
1455
1456 if strings.ContainsAny(nick, illegalNickChars) {
1457 return ircError{&irc.Message{
1458 Command: irc.ERR_ERRONEUSNICKNAME,
1459 Params: []string{dc.nick, rawNick, "contains illegal characters"},
1460 }}
1461 }
1462 if casemapASCII(nick) == serviceNickCM {
1463 return ircError{&irc.Message{
1464 Command: irc.ERR_NICKNAMEINUSE,
1465 Params: []string{dc.nick, rawNick, "Nickname reserved for bouncer service"},
1466 }}
1467 }
1468
1469 var err error
1470 dc.forEachNetwork(func(n *network) {
1471 if err != nil || (upstream != nil && upstream.network != n) {
1472 return
1473 }
1474 n.Nick = nick
1475 err = dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network)
1476 })
1477 if err != nil {
1478 return err
1479 }
1480
1481 dc.forEachUpstream(func(uc *upstreamConn) {
1482 if upstream != nil && upstream != uc {
1483 return
1484 }
1485 uc.SendMessageLabeled(dc.id, &irc.Message{
1486 Command: "NICK",
1487 Params: []string{nick},
1488 })
1489 })
1490
1491 if dc.upstream() == nil && upstream == nil && dc.nick != nick {
1492 dc.SendMessage(&irc.Message{
1493 Prefix: dc.prefix(),
1494 Command: "NICK",
1495 Params: []string{nick},
1496 })
1497 dc.nick = nick
1498 dc.nickCM = casemapASCII(dc.nick)
1499 }
1500 case "SETNAME":
1501 var realname string
1502 if err := parseMessageParams(msg, &realname); err != nil {
1503 return err
1504 }
1505
1506 // If the client just resets to the default, just wipe the per-network
1507 // preference
1508 storeRealname := realname
1509 if realname == dc.user.Realname {
1510 storeRealname = ""
1511 }
1512
1513 var storeErr error
1514 var needUpdate []Network
1515 dc.forEachNetwork(func(n *network) {
1516 // We only need to call updateNetwork for upstreams that don't
1517 // support setname
1518 if uc := n.conn; uc != nil && uc.caps["setname"] {
1519 uc.SendMessageLabeled(dc.id, &irc.Message{
1520 Command: "SETNAME",
1521 Params: []string{realname},
1522 })
1523
1524 n.Realname = storeRealname
1525 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
1526 dc.logger.Printf("failed to store network realname: %v", err)
1527 storeErr = err
1528 }
1529 return
1530 }
1531
1532 record := n.Network // copy network record because we'll mutate it
1533 record.Realname = storeRealname
1534 needUpdate = append(needUpdate, record)
1535 })
1536
1537 // Walk the network list as a second step, because updateNetwork
1538 // mutates the original list
1539 for _, record := range needUpdate {
1540 if _, err := dc.user.updateNetwork(ctx, &record); err != nil {
1541 dc.logger.Printf("failed to update network realname: %v", err)
1542 storeErr = err
1543 }
1544 }
1545 if storeErr != nil {
1546 return ircError{&irc.Message{
1547 Command: "FAIL",
1548 Params: []string{"SETNAME", "CANNOT_CHANGE_REALNAME", "Failed to update realname"},
1549 }}
1550 }
1551
1552 if dc.upstream() == nil {
1553 dc.SendMessage(&irc.Message{
1554 Prefix: dc.prefix(),
1555 Command: "SETNAME",
1556 Params: []string{realname},
1557 })
1558 }
1559 case "JOIN":
1560 var namesStr string
1561 if err := parseMessageParams(msg, &namesStr); err != nil {
1562 return err
1563 }
1564
1565 var keys []string
1566 if len(msg.Params) > 1 {
1567 keys = strings.Split(msg.Params[1], ",")
1568 }
1569
1570 for i, name := range strings.Split(namesStr, ",") {
1571 uc, upstreamName, err := dc.unmarshalEntity(name)
1572 if err != nil {
1573 return err
1574 }
1575
1576 var key string
1577 if len(keys) > i {
1578 key = keys[i]
1579 }
1580
1581 if !uc.isChannel(upstreamName) {
1582 dc.SendMessage(&irc.Message{
1583 Prefix: dc.srv.prefix(),
1584 Command: irc.ERR_NOSUCHCHANNEL,
1585 Params: []string{name, "Not a channel name"},
1586 })
1587 continue
1588 }
1589
1590 params := []string{upstreamName}
1591 if key != "" {
1592 params = append(params, key)
1593 }
1594 uc.SendMessageLabeled(dc.id, &irc.Message{
1595 Command: "JOIN",
1596 Params: params,
1597 })
1598
1599 ch := uc.network.channels.Value(upstreamName)
1600 if ch != nil {
1601 // Don't clear the channel key if there's one set
1602 // TODO: add a way to unset the channel key
1603 if key != "" {
1604 ch.Key = key
1605 }
1606 uc.network.attach(ch)
1607 } else {
1608 ch = &Channel{
1609 Name: upstreamName,
1610 Key: key,
1611 }
1612 uc.network.channels.SetValue(upstreamName, ch)
1613 }
1614 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
1615 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1616 }
1617 }
1618 case "PART":
1619 var namesStr string
1620 if err := parseMessageParams(msg, &namesStr); err != nil {
1621 return err
1622 }
1623
1624 var reason string
1625 if len(msg.Params) > 1 {
1626 reason = msg.Params[1]
1627 }
1628
1629 for _, name := range strings.Split(namesStr, ",") {
1630 uc, upstreamName, err := dc.unmarshalEntity(name)
1631 if err != nil {
1632 return err
1633 }
1634
1635 if strings.EqualFold(reason, "detach") {
1636 ch := uc.network.channels.Value(upstreamName)
1637 if ch != nil {
1638 uc.network.detach(ch)
1639 } else {
1640 ch = &Channel{
1641 Name: name,
1642 Detached: true,
1643 }
1644 uc.network.channels.SetValue(upstreamName, ch)
1645 }
1646 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
1647 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1648 }
1649 } else {
1650 params := []string{upstreamName}
1651 if reason != "" {
1652 params = append(params, reason)
1653 }
1654 uc.SendMessageLabeled(dc.id, &irc.Message{
1655 Command: "PART",
1656 Params: params,
1657 })
1658
1659 if err := uc.network.deleteChannel(ctx, upstreamName); err != nil {
1660 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1661 }
1662 }
1663 }
1664 case "KICK":
1665 var channelStr, userStr string
1666 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1667 return err
1668 }
1669
1670 channels := strings.Split(channelStr, ",")
1671 users := strings.Split(userStr, ",")
1672
1673 var reason string
1674 if len(msg.Params) > 2 {
1675 reason = msg.Params[2]
1676 }
1677
1678 if len(channels) != 1 && len(channels) != len(users) {
1679 return ircError{&irc.Message{
1680 Command: irc.ERR_BADCHANMASK,
1681 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1682 }}
1683 }
1684
1685 for i, user := range users {
1686 var channel string
1687 if len(channels) == 1 {
1688 channel = channels[0]
1689 } else {
1690 channel = channels[i]
1691 }
1692
1693 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1694 if err != nil {
1695 return err
1696 }
1697
1698 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1699 if err != nil {
1700 return err
1701 }
1702
1703 if ucChannel != ucUser {
1704 return ircError{&irc.Message{
1705 Command: irc.ERR_USERNOTINCHANNEL,
1706 Params: []string{dc.nick, user, channel, "They are on another network"},
1707 }}
1708 }
1709 uc := ucChannel
1710
1711 params := []string{upstreamChannel, upstreamUser}
1712 if reason != "" {
1713 params = append(params, reason)
1714 }
1715 uc.SendMessageLabeled(dc.id, &irc.Message{
1716 Command: "KICK",
1717 Params: params,
1718 })
1719 }
1720 case "MODE":
1721 var name string
1722 if err := parseMessageParams(msg, &name); err != nil {
1723 return err
1724 }
1725
1726 var modeStr string
1727 if len(msg.Params) > 1 {
1728 modeStr = msg.Params[1]
1729 }
1730
1731 if casemapASCII(name) == dc.nickCM {
1732 if modeStr != "" {
1733 if uc := dc.upstream(); uc != nil {
1734 uc.SendMessageLabeled(dc.id, &irc.Message{
1735 Command: "MODE",
1736 Params: []string{uc.nick, modeStr},
1737 })
1738 } else {
1739 dc.SendMessage(&irc.Message{
1740 Prefix: dc.srv.prefix(),
1741 Command: irc.ERR_UMODEUNKNOWNFLAG,
1742 Params: []string{dc.nick, "Cannot change user mode in multi-upstream mode"},
1743 })
1744 }
1745 } else {
1746 var userMode string
1747 if uc := dc.upstream(); uc != nil {
1748 userMode = string(uc.modes)
1749 }
1750
1751 dc.SendMessage(&irc.Message{
1752 Prefix: dc.srv.prefix(),
1753 Command: irc.RPL_UMODEIS,
1754 Params: []string{dc.nick, "+" + userMode},
1755 })
1756 }
1757 return nil
1758 }
1759
1760 uc, upstreamName, err := dc.unmarshalEntity(name)
1761 if err != nil {
1762 return err
1763 }
1764
1765 if !uc.isChannel(upstreamName) {
1766 return ircError{&irc.Message{
1767 Command: irc.ERR_USERSDONTMATCH,
1768 Params: []string{dc.nick, "Cannot change mode for other users"},
1769 }}
1770 }
1771
1772 if modeStr != "" {
1773 params := []string{upstreamName, modeStr}
1774 params = append(params, msg.Params[2:]...)
1775 uc.SendMessageLabeled(dc.id, &irc.Message{
1776 Command: "MODE",
1777 Params: params,
1778 })
1779 } else {
1780 ch := uc.channels.Value(upstreamName)
1781 if ch == nil {
1782 return ircError{&irc.Message{
1783 Command: irc.ERR_NOSUCHCHANNEL,
1784 Params: []string{dc.nick, name, "No such channel"},
1785 }}
1786 }
1787
1788 if ch.modes == nil {
1789 // we haven't received the initial RPL_CHANNELMODEIS yet
1790 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1791 return nil
1792 }
1793
1794 modeStr, modeParams := ch.modes.Format()
1795 params := []string{dc.nick, name, modeStr}
1796 params = append(params, modeParams...)
1797
1798 dc.SendMessage(&irc.Message{
1799 Prefix: dc.srv.prefix(),
1800 Command: irc.RPL_CHANNELMODEIS,
1801 Params: params,
1802 })
1803 if ch.creationTime != "" {
1804 dc.SendMessage(&irc.Message{
1805 Prefix: dc.srv.prefix(),
1806 Command: rpl_creationtime,
1807 Params: []string{dc.nick, name, ch.creationTime},
1808 })
1809 }
1810 }
1811 case "TOPIC":
1812 var channel string
1813 if err := parseMessageParams(msg, &channel); err != nil {
1814 return err
1815 }
1816
1817 uc, upstreamName, err := dc.unmarshalEntity(channel)
1818 if err != nil {
1819 return err
1820 }
1821
1822 if len(msg.Params) > 1 { // setting topic
1823 topic := msg.Params[1]
1824 uc.SendMessageLabeled(dc.id, &irc.Message{
1825 Command: "TOPIC",
1826 Params: []string{upstreamName, topic},
1827 })
1828 } else { // getting topic
1829 ch := uc.channels.Value(upstreamName)
1830 if ch == nil {
1831 return ircError{&irc.Message{
1832 Command: irc.ERR_NOSUCHCHANNEL,
1833 Params: []string{dc.nick, upstreamName, "No such channel"},
1834 }}
1835 }
1836 sendTopic(dc, ch)
1837 }
1838 case "LIST":
1839 network := dc.network
1840 if network == nil && len(msg.Params) > 0 {
1841 var err error
1842 network, msg.Params[0], err = dc.unmarshalEntityNetwork(msg.Params[0])
1843 if err != nil {
1844 return err
1845 }
1846 }
1847 if network == nil {
1848 dc.SendMessage(&irc.Message{
1849 Prefix: dc.srv.prefix(),
1850 Command: irc.RPL_LISTEND,
1851 Params: []string{dc.nick, "LIST without a network suffix is not supported in multi-upstream mode"},
1852 })
1853 return nil
1854 }
1855
1856 uc := network.conn
1857 if uc == nil {
1858 dc.SendMessage(&irc.Message{
1859 Prefix: dc.srv.prefix(),
1860 Command: irc.RPL_LISTEND,
1861 Params: []string{dc.nick, "Disconnected from upstream server"},
1862 })
1863 return nil
1864 }
1865
1866 uc.enqueueCommand(dc, msg)
1867 case "NAMES":
1868 if len(msg.Params) == 0 {
1869 dc.SendMessage(&irc.Message{
1870 Prefix: dc.srv.prefix(),
1871 Command: irc.RPL_ENDOFNAMES,
1872 Params: []string{dc.nick, "*", "End of /NAMES list"},
1873 })
1874 return nil
1875 }
1876
1877 channels := strings.Split(msg.Params[0], ",")
1878 for _, channel := range channels {
1879 uc, upstreamName, err := dc.unmarshalEntity(channel)
1880 if err != nil {
1881 return err
1882 }
1883
1884 ch := uc.channels.Value(upstreamName)
1885 if ch != nil {
1886 sendNames(dc, ch)
1887 } else {
1888 // NAMES on a channel we have not joined, ask upstream
1889 uc.SendMessageLabeled(dc.id, &irc.Message{
1890 Command: "NAMES",
1891 Params: []string{upstreamName},
1892 })
1893 }
1894 }
1895 // For WHOX docs, see:
1896 // - http://faerion.sourceforge.net/doc/irc/whox.var
1897 // - https://github.com/quakenet/snircd/blob/master/doc/readme.who
1898 // Note, many features aren't widely implemented, such as flags and mask2
1899 case "WHO":
1900 if len(msg.Params) == 0 {
1901 // TODO: support WHO without parameters
1902 dc.SendMessage(&irc.Message{
1903 Prefix: dc.srv.prefix(),
1904 Command: irc.RPL_ENDOFWHO,
1905 Params: []string{dc.nick, "*", "End of /WHO list"},
1906 })
1907 return nil
1908 }
1909
1910 // Clients will use the first mask to match RPL_ENDOFWHO
1911 endOfWhoToken := msg.Params[0]
1912
1913 // TODO: add support for WHOX mask2
1914 mask := msg.Params[0]
1915 var options string
1916 if len(msg.Params) > 1 {
1917 options = msg.Params[1]
1918 }
1919
1920 optionsParts := strings.SplitN(options, "%", 2)
1921 // TODO: add support for WHOX flags in optionsParts[0]
1922 var fields, whoxToken string
1923 if len(optionsParts) == 2 {
1924 optionsParts := strings.SplitN(optionsParts[1], ",", 2)
1925 fields = strings.ToLower(optionsParts[0])
1926 if len(optionsParts) == 2 && strings.Contains(fields, "t") {
1927 whoxToken = optionsParts[1]
1928 }
1929 }
1930
1931 // TODO: support mixed bouncer/upstream WHO queries
1932 maskCM := casemapASCII(mask)
1933 if dc.network == nil && maskCM == dc.nickCM {
1934 // TODO: support AWAY (H/G) in self WHO reply
1935 flags := "H"
1936 if dc.user.Admin {
1937 flags += "*"
1938 }
1939 info := whoxInfo{
1940 Token: whoxToken,
1941 Username: dc.user.Username,
1942 Hostname: dc.hostname,
1943 Server: dc.srv.Hostname,
1944 Nickname: dc.nick,
1945 Flags: flags,
1946 Account: dc.user.Username,
1947 Realname: dc.realname,
1948 }
1949 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
1950 dc.SendMessage(&irc.Message{
1951 Prefix: dc.srv.prefix(),
1952 Command: irc.RPL_ENDOFWHO,
1953 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
1954 })
1955 return nil
1956 }
1957 if maskCM == serviceNickCM {
1958 info := whoxInfo{
1959 Token: whoxToken,
1960 Username: servicePrefix.User,
1961 Hostname: servicePrefix.Host,
1962 Server: dc.srv.Hostname,
1963 Nickname: serviceNick,
1964 Flags: "H*",
1965 Account: serviceNick,
1966 Realname: serviceRealname,
1967 }
1968 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
1969 dc.SendMessage(&irc.Message{
1970 Prefix: dc.srv.prefix(),
1971 Command: irc.RPL_ENDOFWHO,
1972 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
1973 })
1974 return nil
1975 }
1976
1977 // TODO: properly support WHO masks
1978 uc, upstreamMask, err := dc.unmarshalEntity(mask)
1979 if err != nil {
1980 return err
1981 }
1982
1983 params := []string{upstreamMask}
1984 if options != "" {
1985 params = append(params, options)
1986 }
1987
1988 uc.enqueueCommand(dc, &irc.Message{
1989 Command: "WHO",
1990 Params: params,
1991 })
1992 case "WHOIS":
1993 if len(msg.Params) == 0 {
1994 return ircError{&irc.Message{
1995 Command: irc.ERR_NONICKNAMEGIVEN,
1996 Params: []string{dc.nick, "No nickname given"},
1997 }}
1998 }
1999
2000 var target, mask string
2001 if len(msg.Params) == 1 {
2002 target = ""
2003 mask = msg.Params[0]
2004 } else {
2005 target = msg.Params[0]
2006 mask = msg.Params[1]
2007 }
2008 // TODO: support multiple WHOIS users
2009 if i := strings.IndexByte(mask, ','); i >= 0 {
2010 mask = mask[:i]
2011 }
2012
2013 if dc.network == nil && casemapASCII(mask) == dc.nickCM {
2014 dc.SendMessage(&irc.Message{
2015 Prefix: dc.srv.prefix(),
2016 Command: irc.RPL_WHOISUSER,
2017 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
2018 })
2019 dc.SendMessage(&irc.Message{
2020 Prefix: dc.srv.prefix(),
2021 Command: irc.RPL_WHOISSERVER,
2022 Params: []string{dc.nick, dc.nick, dc.srv.Hostname, "soju"},
2023 })
2024 if dc.user.Admin {
2025 dc.SendMessage(&irc.Message{
2026 Prefix: dc.srv.prefix(),
2027 Command: irc.RPL_WHOISOPERATOR,
2028 Params: []string{dc.nick, dc.nick, "is a bouncer administrator"},
2029 })
2030 }
2031 dc.SendMessage(&irc.Message{
2032 Prefix: dc.srv.prefix(),
2033 Command: rpl_whoisaccount,
2034 Params: []string{dc.nick, dc.nick, dc.user.Username, "is logged in as"},
2035 })
2036 dc.SendMessage(&irc.Message{
2037 Prefix: dc.srv.prefix(),
2038 Command: irc.RPL_ENDOFWHOIS,
2039 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
2040 })
2041 return nil
2042 }
2043 if casemapASCII(mask) == serviceNickCM {
2044 dc.SendMessage(&irc.Message{
2045 Prefix: dc.srv.prefix(),
2046 Command: irc.RPL_WHOISUSER,
2047 Params: []string{dc.nick, serviceNick, servicePrefix.User, servicePrefix.Host, "*", serviceRealname},
2048 })
2049 dc.SendMessage(&irc.Message{
2050 Prefix: dc.srv.prefix(),
2051 Command: irc.RPL_WHOISSERVER,
2052 Params: []string{dc.nick, serviceNick, dc.srv.Hostname, "soju"},
2053 })
2054 dc.SendMessage(&irc.Message{
2055 Prefix: dc.srv.prefix(),
2056 Command: irc.RPL_WHOISOPERATOR,
2057 Params: []string{dc.nick, serviceNick, "is the bouncer service"},
2058 })
2059 dc.SendMessage(&irc.Message{
2060 Prefix: dc.srv.prefix(),
2061 Command: rpl_whoisaccount,
2062 Params: []string{dc.nick, serviceNick, serviceNick, "is logged in as"},
2063 })
2064 dc.SendMessage(&irc.Message{
2065 Prefix: dc.srv.prefix(),
2066 Command: irc.RPL_ENDOFWHOIS,
2067 Params: []string{dc.nick, serviceNick, "End of /WHOIS list"},
2068 })
2069 return nil
2070 }
2071
2072 // TODO: support WHOIS masks
2073 uc, upstreamNick, err := dc.unmarshalEntity(mask)
2074 if err != nil {
2075 return err
2076 }
2077
2078 var params []string
2079 if target != "" {
2080 if target == mask { // WHOIS nick nick
2081 params = []string{upstreamNick, upstreamNick}
2082 } else {
2083 params = []string{target, upstreamNick}
2084 }
2085 } else {
2086 params = []string{upstreamNick}
2087 }
2088
2089 uc.SendMessageLabeled(dc.id, &irc.Message{
2090 Command: "WHOIS",
2091 Params: params,
2092 })
2093 case "PRIVMSG", "NOTICE":
2094 var targetsStr, text string
2095 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
2096 return err
2097 }
2098 tags := copyClientTags(msg.Tags)
2099
2100 for _, name := range strings.Split(targetsStr, ",") {
2101 if name == "$"+dc.srv.Hostname || (name == "$*" && dc.network == nil) {
2102 // "$" means a server mask follows. If it's the bouncer's
2103 // hostname, broadcast the message to all bouncer users.
2104 if !dc.user.Admin {
2105 return ircError{&irc.Message{
2106 Prefix: dc.srv.prefix(),
2107 Command: irc.ERR_BADMASK,
2108 Params: []string{dc.nick, name, "Permission denied to broadcast message to all bouncer users"},
2109 }}
2110 }
2111
2112 dc.logger.Printf("broadcasting bouncer-wide %v: %v", msg.Command, text)
2113
2114 broadcastTags := tags.Copy()
2115 broadcastTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2116 broadcastMsg := &irc.Message{
2117 Tags: broadcastTags,
2118 Prefix: servicePrefix,
2119 Command: msg.Command,
2120 Params: []string{name, text},
2121 }
2122 dc.srv.forEachUser(func(u *user) {
2123 u.events <- eventBroadcast{broadcastMsg}
2124 })
2125 continue
2126 }
2127
2128 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2129 dc.SendMessage(&irc.Message{
2130 Tags: msg.Tags.Copy(),
2131 Prefix: dc.prefix(),
2132 Command: msg.Command,
2133 Params: []string{name, text},
2134 })
2135 continue
2136 }
2137
2138 if msg.Command == "PRIVMSG" && casemapASCII(name) == serviceNickCM {
2139 if dc.caps["echo-message"] {
2140 echoTags := tags.Copy()
2141 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2142 dc.SendMessage(&irc.Message{
2143 Tags: echoTags,
2144 Prefix: dc.prefix(),
2145 Command: msg.Command,
2146 Params: []string{name, text},
2147 })
2148 }
2149 handleServicePRIVMSG(ctx, dc, text)
2150 continue
2151 }
2152
2153 uc, upstreamName, err := dc.unmarshalEntity(name)
2154 if err != nil {
2155 return err
2156 }
2157
2158 if msg.Command == "PRIVMSG" && uc.network.casemap(upstreamName) == "nickserv" {
2159 dc.handleNickServPRIVMSG(ctx, uc, text)
2160 }
2161
2162 unmarshaledText := text
2163 if uc.isChannel(upstreamName) {
2164 unmarshaledText = dc.unmarshalText(uc, text)
2165 }
2166 uc.SendMessageLabeled(dc.id, &irc.Message{
2167 Tags: tags,
2168 Command: msg.Command,
2169 Params: []string{upstreamName, unmarshaledText},
2170 })
2171
2172 echoTags := tags.Copy()
2173 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2174 if uc.account != "" {
2175 echoTags["account"] = irc.TagValue(uc.account)
2176 }
2177 echoMsg := &irc.Message{
2178 Tags: echoTags,
2179 Prefix: &irc.Prefix{
2180 Name: uc.nick,
2181 User: uc.username,
2182 },
2183 Command: msg.Command,
2184 Params: []string{upstreamName, text},
2185 }
2186 uc.produce(upstreamName, echoMsg, dc)
2187
2188 uc.updateChannelAutoDetach(upstreamName)
2189 }
2190 case "TAGMSG":
2191 var targetsStr string
2192 if err := parseMessageParams(msg, &targetsStr); err != nil {
2193 return err
2194 }
2195 tags := copyClientTags(msg.Tags)
2196
2197 for _, name := range strings.Split(targetsStr, ",") {
2198 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2199 dc.SendMessage(&irc.Message{
2200 Tags: msg.Tags.Copy(),
2201 Prefix: dc.prefix(),
2202 Command: "TAGMSG",
2203 Params: []string{name},
2204 })
2205 continue
2206 }
2207
2208 if casemapASCII(name) == serviceNickCM {
2209 continue
2210 }
2211
2212 uc, upstreamName, err := dc.unmarshalEntity(name)
2213 if err != nil {
2214 return err
2215 }
2216 if _, ok := uc.caps["message-tags"]; !ok {
2217 continue
2218 }
2219
2220 uc.SendMessageLabeled(dc.id, &irc.Message{
2221 Tags: tags,
2222 Command: "TAGMSG",
2223 Params: []string{upstreamName},
2224 })
2225
2226 uc.updateChannelAutoDetach(upstreamName)
2227 }
2228 case "INVITE":
2229 var user, channel string
2230 if err := parseMessageParams(msg, &user, &channel); err != nil {
2231 return err
2232 }
2233
2234 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
2235 if err != nil {
2236 return err
2237 }
2238
2239 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
2240 if err != nil {
2241 return err
2242 }
2243
2244 if ucChannel != ucUser {
2245 return ircError{&irc.Message{
2246 Command: irc.ERR_USERNOTINCHANNEL,
2247 Params: []string{dc.nick, user, channel, "They are on another network"},
2248 }}
2249 }
2250 uc := ucChannel
2251
2252 uc.SendMessageLabeled(dc.id, &irc.Message{
2253 Command: "INVITE",
2254 Params: []string{upstreamUser, upstreamChannel},
2255 })
2256 case "CHATHISTORY":
2257 var subcommand string
2258 if err := parseMessageParams(msg, &subcommand); err != nil {
2259 return err
2260 }
2261 var target, limitStr string
2262 var boundsStr [2]string
2263 switch subcommand {
2264 case "AFTER", "BEFORE":
2265 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &limitStr); err != nil {
2266 return err
2267 }
2268 case "BETWEEN":
2269 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2270 return err
2271 }
2272 case "TARGETS":
2273 if err := parseMessageParams(msg, nil, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2274 return err
2275 }
2276 default:
2277 // TODO: support LATEST, AROUND
2278 return ircError{&irc.Message{
2279 Command: "FAIL",
2280 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, "Unknown command"},
2281 }}
2282 }
2283
2284 // We don't save history for our service
2285 if casemapASCII(target) == serviceNickCM {
2286 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {})
2287 return nil
2288 }
2289
2290 store, ok := dc.user.msgStore.(chatHistoryMessageStore)
2291 if !ok {
2292 return ircError{&irc.Message{
2293 Command: irc.ERR_UNKNOWNCOMMAND,
2294 Params: []string{dc.nick, "CHATHISTORY", "Unknown command"},
2295 }}
2296 }
2297
2298 network, entity, err := dc.unmarshalEntityNetwork(target)
2299 if err != nil {
2300 return err
2301 }
2302 entity = network.casemap(entity)
2303
2304 // TODO: support msgid criteria
2305 var bounds [2]time.Time
2306 bounds[0] = parseChatHistoryBound(boundsStr[0])
2307 if bounds[0].IsZero() {
2308 return ircError{&irc.Message{
2309 Command: "FAIL",
2310 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[0], "Invalid first bound"},
2311 }}
2312 }
2313
2314 if boundsStr[1] != "" {
2315 bounds[1] = parseChatHistoryBound(boundsStr[1])
2316 if bounds[1].IsZero() {
2317 return ircError{&irc.Message{
2318 Command: "FAIL",
2319 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[1], "Invalid second bound"},
2320 }}
2321 }
2322 }
2323
2324 limit, err := strconv.Atoi(limitStr)
2325 if err != nil || limit < 0 || limit > chatHistoryLimit {
2326 return ircError{&irc.Message{
2327 Command: "FAIL",
2328 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, limitStr, "Invalid limit"},
2329 }}
2330 }
2331
2332 eventPlayback := dc.caps["draft/event-playback"]
2333
2334 var history []*irc.Message
2335 switch subcommand {
2336 case "BEFORE":
2337 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], time.Time{}, limit, eventPlayback)
2338 case "AFTER":
2339 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], time.Now(), limit, eventPlayback)
2340 case "BETWEEN":
2341 if bounds[0].Before(bounds[1]) {
2342 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
2343 } else {
2344 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
2345 }
2346 case "TARGETS":
2347 // TODO: support TARGETS in multi-upstream mode
2348 targets, err := store.ListTargets(ctx, &network.Network, bounds[0], bounds[1], limit, eventPlayback)
2349 if err != nil {
2350 dc.logger.Printf("failed fetching targets for chathistory: %v", err)
2351 return ircError{&irc.Message{
2352 Command: "FAIL",
2353 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, "Failed to retrieve targets"},
2354 }}
2355 }
2356
2357 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {
2358 for _, target := range targets {
2359 if ch := network.channels.Value(target.Name); ch != nil && ch.Detached {
2360 continue
2361 }
2362
2363 dc.SendMessage(&irc.Message{
2364 Tags: irc.Tags{"batch": batchRef},
2365 Prefix: dc.srv.prefix(),
2366 Command: "CHATHISTORY",
2367 Params: []string{"TARGETS", target.Name, target.LatestMessage.UTC().Format(serverTimeLayout)},
2368 })
2369 }
2370 })
2371
2372 return nil
2373 }
2374 if err != nil {
2375 dc.logger.Printf("failed fetching %q messages for chathistory: %v", target, err)
2376 return newChatHistoryError(subcommand, target)
2377 }
2378
2379 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {
2380 for _, msg := range history {
2381 msg.Tags["batch"] = batchRef
2382 dc.SendMessage(dc.marshalMessage(msg, network))
2383 }
2384 })
2385 case "BOUNCER":
2386 var subcommand string
2387 if err := parseMessageParams(msg, &subcommand); err != nil {
2388 return err
2389 }
2390
2391 switch strings.ToUpper(subcommand) {
2392 case "BIND":
2393 return ircError{&irc.Message{
2394 Command: "FAIL",
2395 Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind to a network after registration"},
2396 }}
2397 case "LISTNETWORKS":
2398 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
2399 dc.user.forEachNetwork(func(network *network) {
2400 idStr := fmt.Sprintf("%v", network.ID)
2401 attrs := getNetworkAttrs(network)
2402 dc.SendMessage(&irc.Message{
2403 Tags: irc.Tags{"batch": batchRef},
2404 Prefix: dc.srv.prefix(),
2405 Command: "BOUNCER",
2406 Params: []string{"NETWORK", idStr, attrs.String()},
2407 })
2408 })
2409 })
2410 case "ADDNETWORK":
2411 var attrsStr string
2412 if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
2413 return err
2414 }
2415 attrs := irc.ParseTags(attrsStr)
2416
2417 record := &Network{Nick: dc.nick, Enabled: true}
2418 if err := updateNetworkAttrs(record, attrs, subcommand); err != nil {
2419 return err
2420 }
2421
2422 if record.Nick == dc.user.Username {
2423 record.Nick = ""
2424 }
2425 if record.Realname == dc.user.Realname {
2426 record.Realname = ""
2427 }
2428
2429 network, err := dc.user.createNetwork(ctx, record)
2430 if err != nil {
2431 return ircError{&irc.Message{
2432 Command: "FAIL",
2433 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
2434 }}
2435 }
2436
2437 dc.SendMessage(&irc.Message{
2438 Prefix: dc.srv.prefix(),
2439 Command: "BOUNCER",
2440 Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
2441 })
2442 case "CHANGENETWORK":
2443 var idStr, attrsStr string
2444 if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
2445 return err
2446 }
2447 id, err := parseBouncerNetID(subcommand, idStr)
2448 if err != nil {
2449 return err
2450 }
2451 attrs := irc.ParseTags(attrsStr)
2452
2453 net := dc.user.getNetworkByID(id)
2454 if net == nil {
2455 return ircError{&irc.Message{
2456 Command: "FAIL",
2457 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2458 }}
2459 }
2460
2461 record := net.Network // copy network record because we'll mutate it
2462 if err := updateNetworkAttrs(&record, attrs, subcommand); err != nil {
2463 return err
2464 }
2465
2466 if record.Nick == dc.user.Username {
2467 record.Nick = ""
2468 }
2469 if record.Realname == dc.user.Realname {
2470 record.Realname = ""
2471 }
2472
2473 _, err = dc.user.updateNetwork(ctx, &record)
2474 if err != nil {
2475 return ircError{&irc.Message{
2476 Command: "FAIL",
2477 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
2478 }}
2479 }
2480
2481 dc.SendMessage(&irc.Message{
2482 Prefix: dc.srv.prefix(),
2483 Command: "BOUNCER",
2484 Params: []string{"CHANGENETWORK", idStr},
2485 })
2486 case "DELNETWORK":
2487 var idStr string
2488 if err := parseMessageParams(msg, nil, &idStr); err != nil {
2489 return err
2490 }
2491 id, err := parseBouncerNetID(subcommand, idStr)
2492 if err != nil {
2493 return err
2494 }
2495
2496 net := dc.user.getNetworkByID(id)
2497 if net == nil {
2498 return ircError{&irc.Message{
2499 Command: "FAIL",
2500 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2501 }}
2502 }
2503
2504 if err := dc.user.deleteNetwork(ctx, net.ID); err != nil {
2505 return err
2506 }
2507
2508 dc.SendMessage(&irc.Message{
2509 Prefix: dc.srv.prefix(),
2510 Command: "BOUNCER",
2511 Params: []string{"DELNETWORK", idStr},
2512 })
2513 default:
2514 return ircError{&irc.Message{
2515 Command: "FAIL",
2516 Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
2517 }}
2518 }
2519 default:
2520 dc.logger.Printf("unhandled message: %v", msg)
2521
2522 // Only forward unknown commands in single-upstream mode
2523 uc := dc.upstream()
2524 if uc == nil {
2525 return newUnknownCommandError(msg.Command)
2526 }
2527
2528 uc.SendMessageLabeled(dc.id, msg)
2529 }
2530 return nil
2531}
2532
2533func (dc *downstreamConn) handleNickServPRIVMSG(ctx context.Context, uc *upstreamConn, text string) {
2534 username, password, ok := parseNickServCredentials(text, uc.nick)
2535 if !ok {
2536 return
2537 }
2538
2539 // User may have e.g. EXTERNAL mechanism configured. We do not want to
2540 // automatically erase the key pair or any other credentials.
2541 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
2542 return
2543 }
2544
2545 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
2546 n := uc.network
2547 n.SASL.Mechanism = "PLAIN"
2548 n.SASL.Plain.Username = username
2549 n.SASL.Plain.Password = password
2550 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
2551 dc.logger.Printf("failed to save NickServ credentials: %v", err)
2552 }
2553}
2554
2555func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
2556 fields := strings.Fields(text)
2557 if len(fields) < 2 {
2558 return "", "", false
2559 }
2560 cmd := strings.ToUpper(fields[0])
2561 params := fields[1:]
2562 switch cmd {
2563 case "REGISTER":
2564 username = nick
2565 password = params[0]
2566 case "IDENTIFY":
2567 if len(params) == 1 {
2568 username = nick
2569 password = params[0]
2570 } else {
2571 username = params[0]
2572 password = params[1]
2573 }
2574 case "SET":
2575 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
2576 username = nick
2577 password = params[1]
2578 }
2579 default:
2580 return "", "", false
2581 }
2582 return username, password, true
2583}
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