source: code/trunk/downstream.go@ 691

Last change on this file since 691 was 691, checked in by contact, 4 years ago

Allow most config options to be reloaded

Closes: ​https://todo.sr.ht/~emersion/soju/42
File size: 67.8 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 "draft/extended-monitor": "",
210}
211
212// passthroughIsupport is the set of ISUPPORT tokens that are directly passed
213// through from the upstream server to downstream clients.
214//
215// This is only effective in single-upstream mode.
216var passthroughIsupport = map[string]bool{
217 "AWAYLEN": true,
218 "BOT": true,
219 "CHANLIMIT": true,
220 "CHANMODES": true,
221 "CHANNELLEN": true,
222 "CHANTYPES": true,
223 "CLIENTTAGDENY": true,
224 "ELIST": true,
225 "EXCEPTS": true,
226 "EXTBAN": true,
227 "HOSTLEN": true,
228 "INVEX": true,
229 "KICKLEN": true,
230 "MAXLIST": true,
231 "MAXTARGETS": true,
232 "MODES": true,
233 "MONITOR": true,
234 "NAMELEN": true,
235 "NETWORK": true,
236 "NICKLEN": true,
237 "PREFIX": true,
238 "SAFELIST": true,
239 "TARGMAX": true,
240 "TOPICLEN": true,
241 "USERLEN": true,
242 "UTF8ONLY": true,
243 "WHOX": true,
244}
245
246type downstreamConn struct {
247 conn
248
249 id uint64
250
251 registered bool
252 user *user
253 nick string
254 nickCM string
255 rawUsername string
256 networkName string
257 clientName string
258 realname string
259 hostname string
260 password string // empty after authentication
261 network *network // can be nil
262
263 negotiatingCaps bool
264 capVersion int
265 supportedCaps map[string]string
266 caps map[string]bool
267
268 lastBatchRef uint64
269
270 monitored casemapMap
271
272 saslServer sasl.Server
273}
274
275func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
276 remoteAddr := ic.RemoteAddr().String()
277 logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
278 options := connOptions{Logger: logger}
279 dc := &downstreamConn{
280 conn: *newConn(srv, ic, &options),
281 id: id,
282 supportedCaps: make(map[string]string),
283 caps: make(map[string]bool),
284 monitored: newCasemapMap(0),
285 }
286 dc.hostname = remoteAddr
287 if host, _, err := net.SplitHostPort(dc.hostname); err == nil {
288 dc.hostname = host
289 }
290 for k, v := range permanentDownstreamCaps {
291 dc.supportedCaps[k] = v
292 }
293 // TODO: this is racy, we should only enable chathistory after
294 // authentication and then check that user.msgStore implements
295 // chatHistoryMessageStore
296 if srv.Config().LogPath != "" {
297 dc.supportedCaps["draft/chathistory"] = ""
298 }
299 return dc
300}
301
302func (dc *downstreamConn) prefix() *irc.Prefix {
303 return &irc.Prefix{
304 Name: dc.nick,
305 User: dc.user.Username,
306 Host: dc.hostname,
307 }
308}
309
310func (dc *downstreamConn) forEachNetwork(f func(*network)) {
311 if dc.network != nil {
312 f(dc.network)
313 } else if !dc.caps["soju.im/bouncer-networks"] {
314 dc.user.forEachNetwork(f)
315 }
316}
317
318func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
319 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
320 return
321 }
322 dc.user.forEachUpstream(func(uc *upstreamConn) {
323 if dc.network != nil && uc.network != dc.network {
324 return
325 }
326 f(uc)
327 })
328}
329
330// upstream returns the upstream connection, if any. If there are zero or if
331// there are multiple upstream connections, it returns nil.
332func (dc *downstreamConn) upstream() *upstreamConn {
333 if dc.network == nil {
334 return nil
335 }
336 return dc.network.conn
337}
338
339func isOurNick(net *network, nick string) bool {
340 // TODO: this doesn't account for nick changes
341 if net.conn != nil {
342 return net.casemap(nick) == net.conn.nickCM
343 }
344 // We're not currently connected to the upstream connection, so we don't
345 // know whether this name is our nickname. Best-effort: use the network's
346 // configured nickname and hope it was the one being used when we were
347 // connected.
348 return net.casemap(nick) == net.casemap(GetNick(&net.user.User, &net.Network))
349}
350
351// marshalEntity converts an upstream entity name (ie. channel or nick) into a
352// downstream entity name.
353//
354// This involves adding a "/<network>" suffix if the entity isn't the current
355// user.
356func (dc *downstreamConn) marshalEntity(net *network, name string) string {
357 if isOurNick(net, name) {
358 return dc.nick
359 }
360 name = partialCasemap(net.casemap, name)
361 if dc.network != nil {
362 if dc.network != net {
363 panic("soju: tried to marshal an entity for another network")
364 }
365 return name
366 }
367 return name + "/" + net.GetName()
368}
369
370func (dc *downstreamConn) marshalUserPrefix(net *network, prefix *irc.Prefix) *irc.Prefix {
371 if isOurNick(net, prefix.Name) {
372 return dc.prefix()
373 }
374 prefix.Name = partialCasemap(net.casemap, prefix.Name)
375 if dc.network != nil {
376 if dc.network != net {
377 panic("soju: tried to marshal a user prefix for another network")
378 }
379 return prefix
380 }
381 return &irc.Prefix{
382 Name: prefix.Name + "/" + net.GetName(),
383 User: prefix.User,
384 Host: prefix.Host,
385 }
386}
387
388// unmarshalEntityNetwork converts a downstream entity name (ie. channel or
389// nick) into an upstream entity name.
390//
391// This involves removing the "/<network>" suffix.
392func (dc *downstreamConn) unmarshalEntityNetwork(name string) (*network, string, error) {
393 if dc.network != nil {
394 return dc.network, name, nil
395 }
396
397 var net *network
398 if i := strings.LastIndexByte(name, '/'); i >= 0 {
399 network := name[i+1:]
400 name = name[:i]
401
402 for _, n := range dc.user.networks {
403 if network == n.GetName() {
404 net = n
405 break
406 }
407 }
408 }
409
410 if net == nil {
411 return nil, "", ircError{&irc.Message{
412 Command: irc.ERR_NOSUCHCHANNEL,
413 Params: []string{name, "Missing network suffix in name"},
414 }}
415 }
416
417 return net, name, nil
418}
419
420// unmarshalEntity is the same as unmarshalEntityNetwork, but returns the
421// upstream connection and fails if the upstream is disconnected.
422func (dc *downstreamConn) unmarshalEntity(name string) (*upstreamConn, string, error) {
423 net, name, err := dc.unmarshalEntityNetwork(name)
424 if err != nil {
425 return nil, "", err
426 }
427
428 if net.conn == nil {
429 return nil, "", ircError{&irc.Message{
430 Command: irc.ERR_NOSUCHCHANNEL,
431 Params: []string{name, "Disconnected from upstream network"},
432 }}
433 }
434
435 return net.conn, name, nil
436}
437
438func (dc *downstreamConn) unmarshalText(uc *upstreamConn, text string) string {
439 if dc.upstream() != nil {
440 return text
441 }
442 // TODO: smarter parsing that ignores URLs
443 return strings.ReplaceAll(text, "/"+uc.network.GetName(), "")
444}
445
446func (dc *downstreamConn) readMessages(ch chan<- event) error {
447 for {
448 msg, err := dc.ReadMessage()
449 if errors.Is(err, io.EOF) {
450 break
451 } else if err != nil {
452 return fmt.Errorf("failed to read IRC command: %v", err)
453 }
454
455 ch <- eventDownstreamMessage{msg, dc}
456 }
457
458 return nil
459}
460
461// SendMessage sends an outgoing message.
462//
463// This can only called from the user goroutine.
464func (dc *downstreamConn) SendMessage(msg *irc.Message) {
465 if !dc.caps["message-tags"] {
466 if msg.Command == "TAGMSG" {
467 return
468 }
469 msg = msg.Copy()
470 for name := range msg.Tags {
471 supported := false
472 switch name {
473 case "time":
474 supported = dc.caps["server-time"]
475 case "account":
476 supported = dc.caps["account"]
477 }
478 if !supported {
479 delete(msg.Tags, name)
480 }
481 }
482 }
483 if !dc.caps["batch"] && msg.Tags["batch"] != "" {
484 msg = msg.Copy()
485 delete(msg.Tags, "batch")
486 }
487 if msg.Command == "JOIN" && !dc.caps["extended-join"] {
488 msg.Params = msg.Params[:1]
489 }
490 if msg.Command == "SETNAME" && !dc.caps["setname"] {
491 return
492 }
493 if msg.Command == "AWAY" && !dc.caps["away-notify"] {
494 return
495 }
496 if msg.Command == "ACCOUNT" && !dc.caps["account-notify"] {
497 return
498 }
499
500 dc.conn.SendMessage(msg)
501}
502
503func (dc *downstreamConn) SendBatch(typ string, params []string, tags irc.Tags, f func(batchRef irc.TagValue)) {
504 dc.lastBatchRef++
505 ref := fmt.Sprintf("%v", dc.lastBatchRef)
506
507 if dc.caps["batch"] {
508 dc.SendMessage(&irc.Message{
509 Tags: tags,
510 Prefix: dc.srv.prefix(),
511 Command: "BATCH",
512 Params: append([]string{"+" + ref, typ}, params...),
513 })
514 }
515
516 f(irc.TagValue(ref))
517
518 if dc.caps["batch"] {
519 dc.SendMessage(&irc.Message{
520 Prefix: dc.srv.prefix(),
521 Command: "BATCH",
522 Params: []string{"-" + ref},
523 })
524 }
525}
526
527// sendMessageWithID sends an outgoing message with the specified internal ID.
528func (dc *downstreamConn) sendMessageWithID(msg *irc.Message, id string) {
529 dc.SendMessage(msg)
530
531 if id == "" || !dc.messageSupportsBacklog(msg) {
532 return
533 }
534
535 dc.sendPing(id)
536}
537
538// advanceMessageWithID advances history to the specified message ID without
539// sending a message. This is useful e.g. for self-messages when echo-message
540// isn't enabled.
541func (dc *downstreamConn) advanceMessageWithID(msg *irc.Message, id string) {
542 if id == "" || !dc.messageSupportsBacklog(msg) {
543 return
544 }
545
546 dc.sendPing(id)
547}
548
549// ackMsgID acknowledges that a message has been received.
550func (dc *downstreamConn) ackMsgID(id string) {
551 netID, entity, err := parseMsgID(id, nil)
552 if err != nil {
553 dc.logger.Printf("failed to ACK message ID %q: %v", id, err)
554 return
555 }
556
557 network := dc.user.getNetworkByID(netID)
558 if network == nil {
559 return
560 }
561
562 network.delivered.StoreID(entity, dc.clientName, id)
563}
564
565func (dc *downstreamConn) sendPing(msgID string) {
566 token := "soju-msgid-" + msgID
567 dc.SendMessage(&irc.Message{
568 Command: "PING",
569 Params: []string{token},
570 })
571}
572
573func (dc *downstreamConn) handlePong(token string) {
574 if !strings.HasPrefix(token, "soju-msgid-") {
575 dc.logger.Printf("received unrecognized PONG token %q", token)
576 return
577 }
578 msgID := strings.TrimPrefix(token, "soju-msgid-")
579 dc.ackMsgID(msgID)
580}
581
582// marshalMessage re-formats a message coming from an upstream connection so
583// that it's suitable for being sent on this downstream connection. Only
584// messages that may appear in logs are supported, except MODE messages which
585// may only appear in single-upstream mode.
586func (dc *downstreamConn) marshalMessage(msg *irc.Message, net *network) *irc.Message {
587 msg = msg.Copy()
588 msg.Prefix = dc.marshalUserPrefix(net, msg.Prefix)
589
590 if dc.network != nil {
591 return msg
592 }
593
594 switch msg.Command {
595 case "PRIVMSG", "NOTICE", "TAGMSG":
596 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
597 case "NICK":
598 // Nick change for another user
599 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
600 case "JOIN", "PART":
601 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
602 case "KICK":
603 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
604 msg.Params[1] = dc.marshalEntity(net, msg.Params[1])
605 case "TOPIC":
606 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
607 case "QUIT", "SETNAME":
608 // This space is intentionally left blank
609 default:
610 panic(fmt.Sprintf("unexpected %q message", msg.Command))
611 }
612
613 return msg
614}
615
616func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
617 switch msg.Command {
618 case "QUIT":
619 return dc.Close()
620 default:
621 if dc.registered {
622 return dc.handleMessageRegistered(msg)
623 } else {
624 return dc.handleMessageUnregistered(msg)
625 }
626 }
627}
628
629func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
630 switch msg.Command {
631 case "NICK":
632 var nick string
633 if err := parseMessageParams(msg, &nick); err != nil {
634 return err
635 }
636 if strings.ContainsAny(nick, illegalNickChars) {
637 return ircError{&irc.Message{
638 Command: irc.ERR_ERRONEUSNICKNAME,
639 Params: []string{dc.nick, nick, "contains illegal characters"},
640 }}
641 }
642 nickCM := casemapASCII(nick)
643 if nickCM == serviceNickCM {
644 return ircError{&irc.Message{
645 Command: irc.ERR_NICKNAMEINUSE,
646 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
647 }}
648 }
649 dc.nick = nick
650 dc.nickCM = nickCM
651 case "USER":
652 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
653 return err
654 }
655 case "PASS":
656 if err := parseMessageParams(msg, &dc.password); err != nil {
657 return err
658 }
659 case "CAP":
660 var subCmd string
661 if err := parseMessageParams(msg, &subCmd); err != nil {
662 return err
663 }
664 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
665 return err
666 }
667 case "AUTHENTICATE":
668 if !dc.caps["sasl"] {
669 return ircError{&irc.Message{
670 Command: irc.ERR_SASLFAIL,
671 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
672 }}
673 }
674 if len(msg.Params) == 0 {
675 return ircError{&irc.Message{
676 Command: irc.ERR_SASLFAIL,
677 Params: []string{"*", "Missing AUTHENTICATE argument"},
678 }}
679 }
680 if dc.nick == "" {
681 return ircError{&irc.Message{
682 Command: irc.ERR_SASLFAIL,
683 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
684 }}
685 }
686
687 var resp []byte
688 if msg.Params[0] == "*" {
689 dc.saslServer = nil
690 return ircError{&irc.Message{
691 Command: irc.ERR_SASLABORTED,
692 Params: []string{"*", "SASL authentication aborted"},
693 }}
694 } else if dc.saslServer == nil {
695 mech := strings.ToUpper(msg.Params[0])
696 switch mech {
697 case "PLAIN":
698 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
699 return dc.authenticate(username, password)
700 }))
701 default:
702 return ircError{&irc.Message{
703 Command: irc.ERR_SASLFAIL,
704 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
705 }}
706 }
707 } else if msg.Params[0] == "+" {
708 resp = nil
709 } else {
710 // TODO: multi-line messages
711 var err error
712 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
713 if err != nil {
714 dc.saslServer = nil
715 return ircError{&irc.Message{
716 Command: irc.ERR_SASLFAIL,
717 Params: []string{"*", "Invalid base64-encoded response"},
718 }}
719 }
720 }
721
722 challenge, done, err := dc.saslServer.Next(resp)
723 if err != nil {
724 dc.saslServer = nil
725 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
726 return ircError{&irc.Message{
727 Command: irc.ERR_SASLFAIL,
728 Params: []string{"*", ircErr.Message.Params[1]},
729 }}
730 }
731 dc.SendMessage(&irc.Message{
732 Prefix: dc.srv.prefix(),
733 Command: irc.ERR_SASLFAIL,
734 Params: []string{"*", "SASL error"},
735 })
736 return fmt.Errorf("SASL authentication failed: %v", err)
737 } else if done {
738 dc.saslServer = nil
739 dc.SendMessage(&irc.Message{
740 Prefix: dc.srv.prefix(),
741 Command: irc.RPL_LOGGEDIN,
742 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
743 })
744 dc.SendMessage(&irc.Message{
745 Prefix: dc.srv.prefix(),
746 Command: irc.RPL_SASLSUCCESS,
747 Params: []string{dc.nick, "SASL authentication successful"},
748 })
749 } else {
750 challengeStr := "+"
751 if len(challenge) > 0 {
752 challengeStr = base64.StdEncoding.EncodeToString(challenge)
753 }
754
755 // TODO: multi-line messages
756 dc.SendMessage(&irc.Message{
757 Prefix: dc.srv.prefix(),
758 Command: "AUTHENTICATE",
759 Params: []string{challengeStr},
760 })
761 }
762 case "BOUNCER":
763 var subcommand string
764 if err := parseMessageParams(msg, &subcommand); err != nil {
765 return err
766 }
767
768 switch strings.ToUpper(subcommand) {
769 case "BIND":
770 var idStr string
771 if err := parseMessageParams(msg, nil, &idStr); err != nil {
772 return err
773 }
774
775 if dc.user == nil {
776 return ircError{&irc.Message{
777 Command: "FAIL",
778 Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
779 }}
780 }
781
782 id, err := parseBouncerNetID(subcommand, idStr)
783 if err != nil {
784 return err
785 }
786
787 var match *network
788 dc.user.forEachNetwork(func(net *network) {
789 if net.ID == id {
790 match = net
791 }
792 })
793 if match == nil {
794 return ircError{&irc.Message{
795 Command: "FAIL",
796 Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
797 }}
798 }
799
800 dc.networkName = match.GetName()
801 }
802 default:
803 dc.logger.Printf("unhandled message: %v", msg)
804 return newUnknownCommandError(msg.Command)
805 }
806 if dc.rawUsername != "" && dc.nick != "" && !dc.negotiatingCaps {
807 return dc.register()
808 }
809 return nil
810}
811
812func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
813 cmd = strings.ToUpper(cmd)
814
815 replyTo := dc.nick
816 if !dc.registered {
817 replyTo = "*"
818 }
819
820 switch cmd {
821 case "LS":
822 if len(args) > 0 {
823 var err error
824 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
825 return err
826 }
827 }
828 if !dc.registered && dc.capVersion >= 302 {
829 // Let downstream show everything it supports, and trim
830 // down the available capabilities when upstreams are
831 // known.
832 for k, v := range needAllDownstreamCaps {
833 dc.supportedCaps[k] = v
834 }
835 }
836
837 caps := make([]string, 0, len(dc.supportedCaps))
838 for k, v := range dc.supportedCaps {
839 if dc.capVersion >= 302 && v != "" {
840 caps = append(caps, k+"="+v)
841 } else {
842 caps = append(caps, k)
843 }
844 }
845
846 // TODO: multi-line replies
847 dc.SendMessage(&irc.Message{
848 Prefix: dc.srv.prefix(),
849 Command: "CAP",
850 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
851 })
852
853 if dc.capVersion >= 302 {
854 // CAP version 302 implicitly enables cap-notify
855 dc.caps["cap-notify"] = true
856 }
857
858 if !dc.registered {
859 dc.negotiatingCaps = true
860 }
861 case "LIST":
862 var caps []string
863 for name, enabled := range dc.caps {
864 if enabled {
865 caps = append(caps, name)
866 }
867 }
868
869 // TODO: multi-line replies
870 dc.SendMessage(&irc.Message{
871 Prefix: dc.srv.prefix(),
872 Command: "CAP",
873 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
874 })
875 case "REQ":
876 if len(args) == 0 {
877 return ircError{&irc.Message{
878 Command: err_invalidcapcmd,
879 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
880 }}
881 }
882
883 // TODO: atomically ack/nak the whole capability set
884 caps := strings.Fields(args[0])
885 ack := true
886 for _, name := range caps {
887 name = strings.ToLower(name)
888 enable := !strings.HasPrefix(name, "-")
889 if !enable {
890 name = strings.TrimPrefix(name, "-")
891 }
892
893 if enable == dc.caps[name] {
894 continue
895 }
896
897 _, ok := dc.supportedCaps[name]
898 if !ok {
899 ack = false
900 break
901 }
902
903 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
904 // cap-notify cannot be disabled with CAP version 302
905 ack = false
906 break
907 }
908
909 dc.caps[name] = enable
910 }
911
912 reply := "NAK"
913 if ack {
914 reply = "ACK"
915 }
916 dc.SendMessage(&irc.Message{
917 Prefix: dc.srv.prefix(),
918 Command: "CAP",
919 Params: []string{replyTo, reply, args[0]},
920 })
921
922 if !dc.registered {
923 dc.negotiatingCaps = true
924 }
925 case "END":
926 dc.negotiatingCaps = false
927 default:
928 return ircError{&irc.Message{
929 Command: err_invalidcapcmd,
930 Params: []string{replyTo, cmd, "Unknown CAP command"},
931 }}
932 }
933 return nil
934}
935
936func (dc *downstreamConn) setSupportedCap(name, value string) {
937 prevValue, hasPrev := dc.supportedCaps[name]
938 changed := !hasPrev || prevValue != value
939 dc.supportedCaps[name] = value
940
941 if !dc.caps["cap-notify"] || !changed {
942 return
943 }
944
945 replyTo := dc.nick
946 if !dc.registered {
947 replyTo = "*"
948 }
949
950 cap := name
951 if value != "" && dc.capVersion >= 302 {
952 cap = name + "=" + value
953 }
954
955 dc.SendMessage(&irc.Message{
956 Prefix: dc.srv.prefix(),
957 Command: "CAP",
958 Params: []string{replyTo, "NEW", cap},
959 })
960}
961
962func (dc *downstreamConn) unsetSupportedCap(name string) {
963 _, hasPrev := dc.supportedCaps[name]
964 delete(dc.supportedCaps, name)
965 delete(dc.caps, name)
966
967 if !dc.caps["cap-notify"] || !hasPrev {
968 return
969 }
970
971 replyTo := dc.nick
972 if !dc.registered {
973 replyTo = "*"
974 }
975
976 dc.SendMessage(&irc.Message{
977 Prefix: dc.srv.prefix(),
978 Command: "CAP",
979 Params: []string{replyTo, "DEL", name},
980 })
981}
982
983func (dc *downstreamConn) updateSupportedCaps() {
984 supportedCaps := make(map[string]bool)
985 for cap := range needAllDownstreamCaps {
986 supportedCaps[cap] = true
987 }
988 dc.forEachUpstream(func(uc *upstreamConn) {
989 for cap, supported := range supportedCaps {
990 supportedCaps[cap] = supported && uc.caps[cap]
991 }
992 })
993
994 for cap, supported := range supportedCaps {
995 if supported {
996 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
997 } else {
998 dc.unsetSupportedCap(cap)
999 }
1000 }
1001
1002 if _, ok := dc.user.msgStore.(chatHistoryMessageStore); ok && dc.network != nil {
1003 dc.setSupportedCap("draft/event-playback", "")
1004 } else {
1005 dc.unsetSupportedCap("draft/event-playback")
1006 }
1007}
1008
1009func (dc *downstreamConn) updateNick() {
1010 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
1011 dc.SendMessage(&irc.Message{
1012 Prefix: dc.prefix(),
1013 Command: "NICK",
1014 Params: []string{uc.nick},
1015 })
1016 dc.nick = uc.nick
1017 dc.nickCM = casemapASCII(dc.nick)
1018 }
1019}
1020
1021func (dc *downstreamConn) updateRealname() {
1022 if uc := dc.upstream(); uc != nil && uc.realname != dc.realname && dc.caps["setname"] {
1023 dc.SendMessage(&irc.Message{
1024 Prefix: dc.prefix(),
1025 Command: "SETNAME",
1026 Params: []string{uc.realname},
1027 })
1028 dc.realname = uc.realname
1029 }
1030}
1031
1032func sanityCheckServer(addr string) error {
1033 dialer := net.Dialer{Timeout: 30 * time.Second}
1034 conn, err := tls.DialWithDialer(&dialer, "tcp", addr, nil)
1035 if err != nil {
1036 return err
1037 }
1038 return conn.Close()
1039}
1040
1041func unmarshalUsername(rawUsername string) (username, client, network string) {
1042 username = rawUsername
1043
1044 i := strings.IndexAny(username, "/@")
1045 j := strings.LastIndexAny(username, "/@")
1046 if i >= 0 {
1047 username = rawUsername[:i]
1048 }
1049 if j >= 0 {
1050 if rawUsername[j] == '@' {
1051 client = rawUsername[j+1:]
1052 } else {
1053 network = rawUsername[j+1:]
1054 }
1055 }
1056 if i >= 0 && j >= 0 && i < j {
1057 if rawUsername[i] == '@' {
1058 client = rawUsername[i+1 : j]
1059 } else {
1060 network = rawUsername[i+1 : j]
1061 }
1062 }
1063
1064 return username, client, network
1065}
1066
1067func (dc *downstreamConn) authenticate(username, password string) error {
1068 username, clientName, networkName := unmarshalUsername(username)
1069
1070 u, err := dc.srv.db.GetUser(context.TODO(), username)
1071 if err != nil {
1072 dc.logger.Printf("failed authentication for %q: user not found: %v", username, err)
1073 return errAuthFailed
1074 }
1075
1076 // Password auth disabled
1077 if u.Password == "" {
1078 return errAuthFailed
1079 }
1080
1081 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
1082 if err != nil {
1083 dc.logger.Printf("failed authentication for %q: wrong password: %v", username, err)
1084 return errAuthFailed
1085 }
1086
1087 dc.user = dc.srv.getUser(username)
1088 if dc.user == nil {
1089 dc.logger.Printf("failed authentication for %q: user not active", username)
1090 return errAuthFailed
1091 }
1092 dc.clientName = clientName
1093 dc.networkName = networkName
1094 return nil
1095}
1096
1097func (dc *downstreamConn) register() error {
1098 if dc.registered {
1099 return fmt.Errorf("tried to register twice")
1100 }
1101
1102 password := dc.password
1103 dc.password = ""
1104 if dc.user == nil {
1105 if err := dc.authenticate(dc.rawUsername, password); err != nil {
1106 return err
1107 }
1108 }
1109
1110 if dc.clientName == "" && dc.networkName == "" {
1111 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
1112 }
1113
1114 dc.registered = true
1115 dc.logger.Printf("registration complete for user %q", dc.user.Username)
1116 return nil
1117}
1118
1119func (dc *downstreamConn) loadNetwork() error {
1120 if dc.networkName == "" {
1121 return nil
1122 }
1123
1124 network := dc.user.getNetwork(dc.networkName)
1125 if network == nil {
1126 addr := dc.networkName
1127 if !strings.ContainsRune(addr, ':') {
1128 addr = addr + ":6697"
1129 }
1130
1131 dc.logger.Printf("trying to connect to new network %q", addr)
1132 if err := sanityCheckServer(addr); err != nil {
1133 dc.logger.Printf("failed to connect to %q: %v", addr, err)
1134 return ircError{&irc.Message{
1135 Command: irc.ERR_PASSWDMISMATCH,
1136 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
1137 }}
1138 }
1139
1140 // Some clients only allow specifying the nickname (and use the
1141 // nickname as a username too). Strip the network name from the
1142 // nickname when auto-saving networks.
1143 nick, _, _ := unmarshalUsername(dc.nick)
1144
1145 dc.logger.Printf("auto-saving network %q", dc.networkName)
1146 var err error
1147 network, err = dc.user.createNetwork(context.TODO(), &Network{
1148 Addr: dc.networkName,
1149 Nick: nick,
1150 Enabled: true,
1151 })
1152 if err != nil {
1153 return err
1154 }
1155 }
1156
1157 dc.network = network
1158 return nil
1159}
1160
1161func (dc *downstreamConn) welcome() error {
1162 if dc.user == nil || !dc.registered {
1163 panic("tried to welcome an unregistered connection")
1164 }
1165
1166 // TODO: doing this might take some time. We should do it in dc.register
1167 // instead, but we'll potentially be adding a new network and this must be
1168 // done in the user goroutine.
1169 if err := dc.loadNetwork(); err != nil {
1170 return err
1171 }
1172
1173 isupport := []string{
1174 fmt.Sprintf("CHATHISTORY=%v", chatHistoryLimit),
1175 "CASEMAPPING=ascii",
1176 }
1177
1178 if dc.network != nil {
1179 isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
1180 }
1181 if title := dc.srv.Config().Title; dc.network == nil && title != "" {
1182 isupport = append(isupport, "NETWORK="+encodeISUPPORT(title))
1183 }
1184 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
1185 isupport = append(isupport, "WHOX")
1186 }
1187
1188 if uc := dc.upstream(); uc != nil {
1189 for k := range passthroughIsupport {
1190 v, ok := uc.isupport[k]
1191 if !ok {
1192 continue
1193 }
1194 if v != nil {
1195 isupport = append(isupport, fmt.Sprintf("%v=%v", k, *v))
1196 } else {
1197 isupport = append(isupport, k)
1198 }
1199 }
1200 }
1201
1202 dc.SendMessage(&irc.Message{
1203 Prefix: dc.srv.prefix(),
1204 Command: irc.RPL_WELCOME,
1205 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
1206 })
1207 dc.SendMessage(&irc.Message{
1208 Prefix: dc.srv.prefix(),
1209 Command: irc.RPL_YOURHOST,
1210 Params: []string{dc.nick, "Your host is " + dc.srv.Config().Hostname},
1211 })
1212 dc.SendMessage(&irc.Message{
1213 Prefix: dc.srv.prefix(),
1214 Command: irc.RPL_MYINFO,
1215 Params: []string{dc.nick, dc.srv.Config().Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
1216 })
1217 for _, msg := range generateIsupport(dc.srv.prefix(), dc.nick, isupport) {
1218 dc.SendMessage(msg)
1219 }
1220 if uc := dc.upstream(); uc != nil {
1221 dc.SendMessage(&irc.Message{
1222 Prefix: dc.srv.prefix(),
1223 Command: irc.RPL_UMODEIS,
1224 Params: []string{dc.nick, "+" + string(uc.modes)},
1225 })
1226 }
1227 if dc.network == nil && dc.caps["soju.im/bouncer-networks"] && dc.user.Admin {
1228 dc.SendMessage(&irc.Message{
1229 Prefix: dc.srv.prefix(),
1230 Command: irc.RPL_UMODEIS,
1231 Params: []string{dc.nick, "+o"},
1232 })
1233 }
1234
1235 if motd := dc.user.srv.Config().MOTD; motd != "" && dc.network == nil {
1236 for _, msg := range generateMOTD(dc.srv.prefix(), dc.nick, motd) {
1237 dc.SendMessage(msg)
1238 }
1239 } else {
1240 motdHint := "No MOTD"
1241 if dc.network != nil {
1242 motdHint = "Use /motd to read the message of the day"
1243 }
1244 dc.SendMessage(&irc.Message{
1245 Prefix: dc.srv.prefix(),
1246 Command: irc.ERR_NOMOTD,
1247 Params: []string{dc.nick, motdHint},
1248 })
1249 }
1250
1251 dc.updateNick()
1252 dc.updateRealname()
1253 dc.updateSupportedCaps()
1254
1255 if dc.caps["soju.im/bouncer-networks-notify"] {
1256 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
1257 dc.user.forEachNetwork(func(network *network) {
1258 idStr := fmt.Sprintf("%v", network.ID)
1259 attrs := getNetworkAttrs(network)
1260 dc.SendMessage(&irc.Message{
1261 Tags: irc.Tags{"batch": batchRef},
1262 Prefix: dc.srv.prefix(),
1263 Command: "BOUNCER",
1264 Params: []string{"NETWORK", idStr, attrs.String()},
1265 })
1266 })
1267 })
1268 }
1269
1270 dc.forEachUpstream(func(uc *upstreamConn) {
1271 for _, entry := range uc.channels.innerMap {
1272 ch := entry.value.(*upstreamChannel)
1273 if !ch.complete {
1274 continue
1275 }
1276 record := uc.network.channels.Value(ch.Name)
1277 if record != nil && record.Detached {
1278 continue
1279 }
1280
1281 dc.SendMessage(&irc.Message{
1282 Prefix: dc.prefix(),
1283 Command: "JOIN",
1284 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
1285 })
1286
1287 forwardChannel(dc, ch)
1288 }
1289 })
1290
1291 dc.forEachNetwork(func(net *network) {
1292 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1293 return
1294 }
1295
1296 // Only send history if we're the first connected client with that name
1297 // for the network
1298 firstClient := true
1299 dc.user.forEachDownstream(func(c *downstreamConn) {
1300 if c != dc && c.clientName == dc.clientName && c.network == dc.network {
1301 firstClient = false
1302 }
1303 })
1304 if firstClient {
1305 net.delivered.ForEachTarget(func(target string) {
1306 lastDelivered := net.delivered.LoadID(target, dc.clientName)
1307 if lastDelivered == "" {
1308 return
1309 }
1310
1311 dc.sendTargetBacklog(net, target, lastDelivered)
1312
1313 // Fast-forward history to last message
1314 targetCM := net.casemap(target)
1315 lastID, err := dc.user.msgStore.LastMsgID(&net.Network, targetCM, time.Now())
1316 if err != nil {
1317 dc.logger.Printf("failed to get last message ID: %v", err)
1318 return
1319 }
1320 net.delivered.StoreID(target, dc.clientName, lastID)
1321 })
1322 }
1323 })
1324
1325 return nil
1326}
1327
1328// messageSupportsBacklog checks whether the provided message can be sent as
1329// part of an history batch.
1330func (dc *downstreamConn) messageSupportsBacklog(msg *irc.Message) bool {
1331 // Don't replay all messages, because that would mess up client
1332 // state. For instance we just sent the list of users, sending
1333 // PART messages for one of these users would be incorrect.
1334 switch msg.Command {
1335 case "PRIVMSG", "NOTICE":
1336 return true
1337 }
1338 return false
1339}
1340
1341func (dc *downstreamConn) sendTargetBacklog(net *network, target, msgID string) {
1342 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1343 return
1344 }
1345
1346 ch := net.channels.Value(target)
1347
1348 ctx, cancel := context.WithTimeout(context.TODO(), backlogTimeout)
1349 defer cancel()
1350
1351 targetCM := net.casemap(target)
1352 history, err := dc.user.msgStore.LoadLatestID(ctx, &net.Network, targetCM, msgID, backlogLimit)
1353 if err != nil {
1354 dc.logger.Printf("failed to send backlog for %q: %v", target, err)
1355 return
1356 }
1357
1358 dc.SendBatch("chathistory", []string{dc.marshalEntity(net, target)}, nil, func(batchRef irc.TagValue) {
1359 for _, msg := range history {
1360 if ch != nil && ch.Detached {
1361 if net.detachedMessageNeedsRelay(ch, msg) {
1362 dc.relayDetachedMessage(net, msg)
1363 }
1364 } else {
1365 msg.Tags["batch"] = batchRef
1366 dc.SendMessage(dc.marshalMessage(msg, net))
1367 }
1368 }
1369 })
1370}
1371
1372func (dc *downstreamConn) relayDetachedMessage(net *network, msg *irc.Message) {
1373 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
1374 return
1375 }
1376
1377 sender := msg.Prefix.Name
1378 target, text := msg.Params[0], msg.Params[1]
1379 if net.isHighlight(msg) {
1380 sendServiceNOTICE(dc, fmt.Sprintf("highlight in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1381 } else {
1382 sendServiceNOTICE(dc, fmt.Sprintf("message in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1383 }
1384}
1385
1386func (dc *downstreamConn) runUntilRegistered() error {
1387 for !dc.registered {
1388 msg, err := dc.ReadMessage()
1389 if err != nil {
1390 return fmt.Errorf("failed to read IRC command: %w", err)
1391 }
1392
1393 err = dc.handleMessage(msg)
1394 if ircErr, ok := err.(ircError); ok {
1395 ircErr.Message.Prefix = dc.srv.prefix()
1396 dc.SendMessage(ircErr.Message)
1397 } else if err != nil {
1398 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
1399 }
1400 }
1401
1402 return nil
1403}
1404
1405func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
1406 ctx, cancel := context.WithTimeout(context.TODO(), handleDownstreamMessageTimeout)
1407 defer cancel()
1408
1409 switch msg.Command {
1410 case "CAP":
1411 var subCmd string
1412 if err := parseMessageParams(msg, &subCmd); err != nil {
1413 return err
1414 }
1415 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
1416 return err
1417 }
1418 case "PING":
1419 var source, destination string
1420 if err := parseMessageParams(msg, &source); err != nil {
1421 return err
1422 }
1423 if len(msg.Params) > 1 {
1424 destination = msg.Params[1]
1425 }
1426 hostname := dc.srv.Config().Hostname
1427 if destination != "" && destination != hostname {
1428 return ircError{&irc.Message{
1429 Command: irc.ERR_NOSUCHSERVER,
1430 Params: []string{dc.nick, destination, "No such server"},
1431 }}
1432 }
1433 dc.SendMessage(&irc.Message{
1434 Prefix: dc.srv.prefix(),
1435 Command: "PONG",
1436 Params: []string{hostname, source},
1437 })
1438 return nil
1439 case "PONG":
1440 if len(msg.Params) == 0 {
1441 return newNeedMoreParamsError(msg.Command)
1442 }
1443 token := msg.Params[len(msg.Params)-1]
1444 dc.handlePong(token)
1445 case "USER":
1446 return ircError{&irc.Message{
1447 Command: irc.ERR_ALREADYREGISTERED,
1448 Params: []string{dc.nick, "You may not reregister"},
1449 }}
1450 case "NICK":
1451 var rawNick string
1452 if err := parseMessageParams(msg, &rawNick); err != nil {
1453 return err
1454 }
1455
1456 nick := rawNick
1457 var upstream *upstreamConn
1458 if dc.upstream() == nil {
1459 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
1460 if err == nil { // NICK nick/network: NICK only on a specific upstream
1461 upstream = uc
1462 nick = unmarshaledNick
1463 }
1464 }
1465
1466 if strings.ContainsAny(nick, illegalNickChars) {
1467 return ircError{&irc.Message{
1468 Command: irc.ERR_ERRONEUSNICKNAME,
1469 Params: []string{dc.nick, rawNick, "contains illegal characters"},
1470 }}
1471 }
1472 if casemapASCII(nick) == serviceNickCM {
1473 return ircError{&irc.Message{
1474 Command: irc.ERR_NICKNAMEINUSE,
1475 Params: []string{dc.nick, rawNick, "Nickname reserved for bouncer service"},
1476 }}
1477 }
1478
1479 var err error
1480 dc.forEachNetwork(func(n *network) {
1481 if err != nil || (upstream != nil && upstream.network != n) {
1482 return
1483 }
1484 n.Nick = nick
1485 err = dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network)
1486 })
1487 if err != nil {
1488 return err
1489 }
1490
1491 dc.forEachUpstream(func(uc *upstreamConn) {
1492 if upstream != nil && upstream != uc {
1493 return
1494 }
1495 uc.SendMessageLabeled(dc.id, &irc.Message{
1496 Command: "NICK",
1497 Params: []string{nick},
1498 })
1499 })
1500
1501 if dc.upstream() == nil && upstream == nil && dc.nick != nick {
1502 dc.SendMessage(&irc.Message{
1503 Prefix: dc.prefix(),
1504 Command: "NICK",
1505 Params: []string{nick},
1506 })
1507 dc.nick = nick
1508 dc.nickCM = casemapASCII(dc.nick)
1509 }
1510 case "SETNAME":
1511 var realname string
1512 if err := parseMessageParams(msg, &realname); err != nil {
1513 return err
1514 }
1515
1516 // If the client just resets to the default, just wipe the per-network
1517 // preference
1518 storeRealname := realname
1519 if realname == dc.user.Realname {
1520 storeRealname = ""
1521 }
1522
1523 var storeErr error
1524 var needUpdate []Network
1525 dc.forEachNetwork(func(n *network) {
1526 // We only need to call updateNetwork for upstreams that don't
1527 // support setname
1528 if uc := n.conn; uc != nil && uc.caps["setname"] {
1529 uc.SendMessageLabeled(dc.id, &irc.Message{
1530 Command: "SETNAME",
1531 Params: []string{realname},
1532 })
1533
1534 n.Realname = storeRealname
1535 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
1536 dc.logger.Printf("failed to store network realname: %v", err)
1537 storeErr = err
1538 }
1539 return
1540 }
1541
1542 record := n.Network // copy network record because we'll mutate it
1543 record.Realname = storeRealname
1544 needUpdate = append(needUpdate, record)
1545 })
1546
1547 // Walk the network list as a second step, because updateNetwork
1548 // mutates the original list
1549 for _, record := range needUpdate {
1550 if _, err := dc.user.updateNetwork(ctx, &record); err != nil {
1551 dc.logger.Printf("failed to update network realname: %v", err)
1552 storeErr = err
1553 }
1554 }
1555 if storeErr != nil {
1556 return ircError{&irc.Message{
1557 Command: "FAIL",
1558 Params: []string{"SETNAME", "CANNOT_CHANGE_REALNAME", "Failed to update realname"},
1559 }}
1560 }
1561
1562 if dc.upstream() == nil {
1563 dc.SendMessage(&irc.Message{
1564 Prefix: dc.prefix(),
1565 Command: "SETNAME",
1566 Params: []string{realname},
1567 })
1568 }
1569 case "JOIN":
1570 var namesStr string
1571 if err := parseMessageParams(msg, &namesStr); err != nil {
1572 return err
1573 }
1574
1575 var keys []string
1576 if len(msg.Params) > 1 {
1577 keys = strings.Split(msg.Params[1], ",")
1578 }
1579
1580 for i, name := range strings.Split(namesStr, ",") {
1581 uc, upstreamName, err := dc.unmarshalEntity(name)
1582 if err != nil {
1583 return err
1584 }
1585
1586 var key string
1587 if len(keys) > i {
1588 key = keys[i]
1589 }
1590
1591 if !uc.isChannel(upstreamName) {
1592 dc.SendMessage(&irc.Message{
1593 Prefix: dc.srv.prefix(),
1594 Command: irc.ERR_NOSUCHCHANNEL,
1595 Params: []string{name, "Not a channel name"},
1596 })
1597 continue
1598 }
1599
1600 params := []string{upstreamName}
1601 if key != "" {
1602 params = append(params, key)
1603 }
1604 uc.SendMessageLabeled(dc.id, &irc.Message{
1605 Command: "JOIN",
1606 Params: params,
1607 })
1608
1609 ch := uc.network.channels.Value(upstreamName)
1610 if ch != nil {
1611 // Don't clear the channel key if there's one set
1612 // TODO: add a way to unset the channel key
1613 if key != "" {
1614 ch.Key = key
1615 }
1616 uc.network.attach(ch)
1617 } else {
1618 ch = &Channel{
1619 Name: upstreamName,
1620 Key: key,
1621 }
1622 uc.network.channels.SetValue(upstreamName, ch)
1623 }
1624 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
1625 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1626 }
1627 }
1628 case "PART":
1629 var namesStr string
1630 if err := parseMessageParams(msg, &namesStr); err != nil {
1631 return err
1632 }
1633
1634 var reason string
1635 if len(msg.Params) > 1 {
1636 reason = msg.Params[1]
1637 }
1638
1639 for _, name := range strings.Split(namesStr, ",") {
1640 uc, upstreamName, err := dc.unmarshalEntity(name)
1641 if err != nil {
1642 return err
1643 }
1644
1645 if strings.EqualFold(reason, "detach") {
1646 ch := uc.network.channels.Value(upstreamName)
1647 if ch != nil {
1648 uc.network.detach(ch)
1649 } else {
1650 ch = &Channel{
1651 Name: name,
1652 Detached: true,
1653 }
1654 uc.network.channels.SetValue(upstreamName, ch)
1655 }
1656 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
1657 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1658 }
1659 } else {
1660 params := []string{upstreamName}
1661 if reason != "" {
1662 params = append(params, reason)
1663 }
1664 uc.SendMessageLabeled(dc.id, &irc.Message{
1665 Command: "PART",
1666 Params: params,
1667 })
1668
1669 if err := uc.network.deleteChannel(ctx, upstreamName); err != nil {
1670 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1671 }
1672 }
1673 }
1674 case "KICK":
1675 var channelStr, userStr string
1676 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1677 return err
1678 }
1679
1680 channels := strings.Split(channelStr, ",")
1681 users := strings.Split(userStr, ",")
1682
1683 var reason string
1684 if len(msg.Params) > 2 {
1685 reason = msg.Params[2]
1686 }
1687
1688 if len(channels) != 1 && len(channels) != len(users) {
1689 return ircError{&irc.Message{
1690 Command: irc.ERR_BADCHANMASK,
1691 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1692 }}
1693 }
1694
1695 for i, user := range users {
1696 var channel string
1697 if len(channels) == 1 {
1698 channel = channels[0]
1699 } else {
1700 channel = channels[i]
1701 }
1702
1703 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1704 if err != nil {
1705 return err
1706 }
1707
1708 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1709 if err != nil {
1710 return err
1711 }
1712
1713 if ucChannel != ucUser {
1714 return ircError{&irc.Message{
1715 Command: irc.ERR_USERNOTINCHANNEL,
1716 Params: []string{dc.nick, user, channel, "They are on another network"},
1717 }}
1718 }
1719 uc := ucChannel
1720
1721 params := []string{upstreamChannel, upstreamUser}
1722 if reason != "" {
1723 params = append(params, reason)
1724 }
1725 uc.SendMessageLabeled(dc.id, &irc.Message{
1726 Command: "KICK",
1727 Params: params,
1728 })
1729 }
1730 case "MODE":
1731 var name string
1732 if err := parseMessageParams(msg, &name); err != nil {
1733 return err
1734 }
1735
1736 var modeStr string
1737 if len(msg.Params) > 1 {
1738 modeStr = msg.Params[1]
1739 }
1740
1741 if casemapASCII(name) == dc.nickCM {
1742 if modeStr != "" {
1743 if uc := dc.upstream(); uc != nil {
1744 uc.SendMessageLabeled(dc.id, &irc.Message{
1745 Command: "MODE",
1746 Params: []string{uc.nick, modeStr},
1747 })
1748 } else {
1749 dc.SendMessage(&irc.Message{
1750 Prefix: dc.srv.prefix(),
1751 Command: irc.ERR_UMODEUNKNOWNFLAG,
1752 Params: []string{dc.nick, "Cannot change user mode in multi-upstream mode"},
1753 })
1754 }
1755 } else {
1756 var userMode string
1757 if uc := dc.upstream(); uc != nil {
1758 userMode = string(uc.modes)
1759 }
1760
1761 dc.SendMessage(&irc.Message{
1762 Prefix: dc.srv.prefix(),
1763 Command: irc.RPL_UMODEIS,
1764 Params: []string{dc.nick, "+" + userMode},
1765 })
1766 }
1767 return nil
1768 }
1769
1770 uc, upstreamName, err := dc.unmarshalEntity(name)
1771 if err != nil {
1772 return err
1773 }
1774
1775 if !uc.isChannel(upstreamName) {
1776 return ircError{&irc.Message{
1777 Command: irc.ERR_USERSDONTMATCH,
1778 Params: []string{dc.nick, "Cannot change mode for other users"},
1779 }}
1780 }
1781
1782 if modeStr != "" {
1783 params := []string{upstreamName, modeStr}
1784 params = append(params, msg.Params[2:]...)
1785 uc.SendMessageLabeled(dc.id, &irc.Message{
1786 Command: "MODE",
1787 Params: params,
1788 })
1789 } else {
1790 ch := uc.channels.Value(upstreamName)
1791 if ch == nil {
1792 return ircError{&irc.Message{
1793 Command: irc.ERR_NOSUCHCHANNEL,
1794 Params: []string{dc.nick, name, "No such channel"},
1795 }}
1796 }
1797
1798 if ch.modes == nil {
1799 // we haven't received the initial RPL_CHANNELMODEIS yet
1800 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1801 return nil
1802 }
1803
1804 modeStr, modeParams := ch.modes.Format()
1805 params := []string{dc.nick, name, modeStr}
1806 params = append(params, modeParams...)
1807
1808 dc.SendMessage(&irc.Message{
1809 Prefix: dc.srv.prefix(),
1810 Command: irc.RPL_CHANNELMODEIS,
1811 Params: params,
1812 })
1813 if ch.creationTime != "" {
1814 dc.SendMessage(&irc.Message{
1815 Prefix: dc.srv.prefix(),
1816 Command: rpl_creationtime,
1817 Params: []string{dc.nick, name, ch.creationTime},
1818 })
1819 }
1820 }
1821 case "TOPIC":
1822 var channel string
1823 if err := parseMessageParams(msg, &channel); err != nil {
1824 return err
1825 }
1826
1827 uc, upstreamName, err := dc.unmarshalEntity(channel)
1828 if err != nil {
1829 return err
1830 }
1831
1832 if len(msg.Params) > 1 { // setting topic
1833 topic := msg.Params[1]
1834 uc.SendMessageLabeled(dc.id, &irc.Message{
1835 Command: "TOPIC",
1836 Params: []string{upstreamName, topic},
1837 })
1838 } else { // getting topic
1839 ch := uc.channels.Value(upstreamName)
1840 if ch == nil {
1841 return ircError{&irc.Message{
1842 Command: irc.ERR_NOSUCHCHANNEL,
1843 Params: []string{dc.nick, upstreamName, "No such channel"},
1844 }}
1845 }
1846 sendTopic(dc, ch)
1847 }
1848 case "LIST":
1849 network := dc.network
1850 if network == nil && len(msg.Params) > 0 {
1851 var err error
1852 network, msg.Params[0], err = dc.unmarshalEntityNetwork(msg.Params[0])
1853 if err != nil {
1854 return err
1855 }
1856 }
1857 if network == nil {
1858 dc.SendMessage(&irc.Message{
1859 Prefix: dc.srv.prefix(),
1860 Command: irc.RPL_LISTEND,
1861 Params: []string{dc.nick, "LIST without a network suffix is not supported in multi-upstream mode"},
1862 })
1863 return nil
1864 }
1865
1866 uc := network.conn
1867 if uc == nil {
1868 dc.SendMessage(&irc.Message{
1869 Prefix: dc.srv.prefix(),
1870 Command: irc.RPL_LISTEND,
1871 Params: []string{dc.nick, "Disconnected from upstream server"},
1872 })
1873 return nil
1874 }
1875
1876 uc.enqueueCommand(dc, msg)
1877 case "NAMES":
1878 if len(msg.Params) == 0 {
1879 dc.SendMessage(&irc.Message{
1880 Prefix: dc.srv.prefix(),
1881 Command: irc.RPL_ENDOFNAMES,
1882 Params: []string{dc.nick, "*", "End of /NAMES list"},
1883 })
1884 return nil
1885 }
1886
1887 channels := strings.Split(msg.Params[0], ",")
1888 for _, channel := range channels {
1889 uc, upstreamName, err := dc.unmarshalEntity(channel)
1890 if err != nil {
1891 return err
1892 }
1893
1894 ch := uc.channels.Value(upstreamName)
1895 if ch != nil {
1896 sendNames(dc, ch)
1897 } else {
1898 // NAMES on a channel we have not joined, ask upstream
1899 uc.SendMessageLabeled(dc.id, &irc.Message{
1900 Command: "NAMES",
1901 Params: []string{upstreamName},
1902 })
1903 }
1904 }
1905 // For WHOX docs, see:
1906 // - http://faerion.sourceforge.net/doc/irc/whox.var
1907 // - https://github.com/quakenet/snircd/blob/master/doc/readme.who
1908 // Note, many features aren't widely implemented, such as flags and mask2
1909 case "WHO":
1910 if len(msg.Params) == 0 {
1911 // TODO: support WHO without parameters
1912 dc.SendMessage(&irc.Message{
1913 Prefix: dc.srv.prefix(),
1914 Command: irc.RPL_ENDOFWHO,
1915 Params: []string{dc.nick, "*", "End of /WHO list"},
1916 })
1917 return nil
1918 }
1919
1920 // Clients will use the first mask to match RPL_ENDOFWHO
1921 endOfWhoToken := msg.Params[0]
1922
1923 // TODO: add support for WHOX mask2
1924 mask := msg.Params[0]
1925 var options string
1926 if len(msg.Params) > 1 {
1927 options = msg.Params[1]
1928 }
1929
1930 optionsParts := strings.SplitN(options, "%", 2)
1931 // TODO: add support for WHOX flags in optionsParts[0]
1932 var fields, whoxToken string
1933 if len(optionsParts) == 2 {
1934 optionsParts := strings.SplitN(optionsParts[1], ",", 2)
1935 fields = strings.ToLower(optionsParts[0])
1936 if len(optionsParts) == 2 && strings.Contains(fields, "t") {
1937 whoxToken = optionsParts[1]
1938 }
1939 }
1940
1941 // TODO: support mixed bouncer/upstream WHO queries
1942 maskCM := casemapASCII(mask)
1943 if dc.network == nil && maskCM == dc.nickCM {
1944 // TODO: support AWAY (H/G) in self WHO reply
1945 flags := "H"
1946 if dc.user.Admin {
1947 flags += "*"
1948 }
1949 info := whoxInfo{
1950 Token: whoxToken,
1951 Username: dc.user.Username,
1952 Hostname: dc.hostname,
1953 Server: dc.srv.Config().Hostname,
1954 Nickname: dc.nick,
1955 Flags: flags,
1956 Account: dc.user.Username,
1957 Realname: dc.realname,
1958 }
1959 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
1960 dc.SendMessage(&irc.Message{
1961 Prefix: dc.srv.prefix(),
1962 Command: irc.RPL_ENDOFWHO,
1963 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
1964 })
1965 return nil
1966 }
1967 if maskCM == serviceNickCM {
1968 info := whoxInfo{
1969 Token: whoxToken,
1970 Username: servicePrefix.User,
1971 Hostname: servicePrefix.Host,
1972 Server: dc.srv.Config().Hostname,
1973 Nickname: serviceNick,
1974 Flags: "H*",
1975 Account: serviceNick,
1976 Realname: serviceRealname,
1977 }
1978 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
1979 dc.SendMessage(&irc.Message{
1980 Prefix: dc.srv.prefix(),
1981 Command: irc.RPL_ENDOFWHO,
1982 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
1983 })
1984 return nil
1985 }
1986
1987 // TODO: properly support WHO masks
1988 uc, upstreamMask, err := dc.unmarshalEntity(mask)
1989 if err != nil {
1990 return err
1991 }
1992
1993 params := []string{upstreamMask}
1994 if options != "" {
1995 params = append(params, options)
1996 }
1997
1998 uc.enqueueCommand(dc, &irc.Message{
1999 Command: "WHO",
2000 Params: params,
2001 })
2002 case "WHOIS":
2003 if len(msg.Params) == 0 {
2004 return ircError{&irc.Message{
2005 Command: irc.ERR_NONICKNAMEGIVEN,
2006 Params: []string{dc.nick, "No nickname given"},
2007 }}
2008 }
2009
2010 var target, mask string
2011 if len(msg.Params) == 1 {
2012 target = ""
2013 mask = msg.Params[0]
2014 } else {
2015 target = msg.Params[0]
2016 mask = msg.Params[1]
2017 }
2018 // TODO: support multiple WHOIS users
2019 if i := strings.IndexByte(mask, ','); i >= 0 {
2020 mask = mask[:i]
2021 }
2022
2023 if dc.network == nil && casemapASCII(mask) == dc.nickCM {
2024 dc.SendMessage(&irc.Message{
2025 Prefix: dc.srv.prefix(),
2026 Command: irc.RPL_WHOISUSER,
2027 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
2028 })
2029 dc.SendMessage(&irc.Message{
2030 Prefix: dc.srv.prefix(),
2031 Command: irc.RPL_WHOISSERVER,
2032 Params: []string{dc.nick, dc.nick, dc.srv.Config().Hostname, "soju"},
2033 })
2034 if dc.user.Admin {
2035 dc.SendMessage(&irc.Message{
2036 Prefix: dc.srv.prefix(),
2037 Command: irc.RPL_WHOISOPERATOR,
2038 Params: []string{dc.nick, dc.nick, "is a bouncer administrator"},
2039 })
2040 }
2041 dc.SendMessage(&irc.Message{
2042 Prefix: dc.srv.prefix(),
2043 Command: rpl_whoisaccount,
2044 Params: []string{dc.nick, dc.nick, dc.user.Username, "is logged in as"},
2045 })
2046 dc.SendMessage(&irc.Message{
2047 Prefix: dc.srv.prefix(),
2048 Command: irc.RPL_ENDOFWHOIS,
2049 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
2050 })
2051 return nil
2052 }
2053 if casemapASCII(mask) == serviceNickCM {
2054 dc.SendMessage(&irc.Message{
2055 Prefix: dc.srv.prefix(),
2056 Command: irc.RPL_WHOISUSER,
2057 Params: []string{dc.nick, serviceNick, servicePrefix.User, servicePrefix.Host, "*", serviceRealname},
2058 })
2059 dc.SendMessage(&irc.Message{
2060 Prefix: dc.srv.prefix(),
2061 Command: irc.RPL_WHOISSERVER,
2062 Params: []string{dc.nick, serviceNick, dc.srv.Config().Hostname, "soju"},
2063 })
2064 dc.SendMessage(&irc.Message{
2065 Prefix: dc.srv.prefix(),
2066 Command: irc.RPL_WHOISOPERATOR,
2067 Params: []string{dc.nick, serviceNick, "is the bouncer service"},
2068 })
2069 dc.SendMessage(&irc.Message{
2070 Prefix: dc.srv.prefix(),
2071 Command: rpl_whoisaccount,
2072 Params: []string{dc.nick, serviceNick, serviceNick, "is logged in as"},
2073 })
2074 dc.SendMessage(&irc.Message{
2075 Prefix: dc.srv.prefix(),
2076 Command: irc.RPL_ENDOFWHOIS,
2077 Params: []string{dc.nick, serviceNick, "End of /WHOIS list"},
2078 })
2079 return nil
2080 }
2081
2082 // TODO: support WHOIS masks
2083 uc, upstreamNick, err := dc.unmarshalEntity(mask)
2084 if err != nil {
2085 return err
2086 }
2087
2088 var params []string
2089 if target != "" {
2090 if target == mask { // WHOIS nick nick
2091 params = []string{upstreamNick, upstreamNick}
2092 } else {
2093 params = []string{target, upstreamNick}
2094 }
2095 } else {
2096 params = []string{upstreamNick}
2097 }
2098
2099 uc.SendMessageLabeled(dc.id, &irc.Message{
2100 Command: "WHOIS",
2101 Params: params,
2102 })
2103 case "PRIVMSG", "NOTICE":
2104 var targetsStr, text string
2105 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
2106 return err
2107 }
2108 tags := copyClientTags(msg.Tags)
2109
2110 for _, name := range strings.Split(targetsStr, ",") {
2111 if name == "$"+dc.srv.Config().Hostname || (name == "$*" && dc.network == nil) {
2112 // "$" means a server mask follows. If it's the bouncer's
2113 // hostname, broadcast the message to all bouncer users.
2114 if !dc.user.Admin {
2115 return ircError{&irc.Message{
2116 Prefix: dc.srv.prefix(),
2117 Command: irc.ERR_BADMASK,
2118 Params: []string{dc.nick, name, "Permission denied to broadcast message to all bouncer users"},
2119 }}
2120 }
2121
2122 dc.logger.Printf("broadcasting bouncer-wide %v: %v", msg.Command, text)
2123
2124 broadcastTags := tags.Copy()
2125 broadcastTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2126 broadcastMsg := &irc.Message{
2127 Tags: broadcastTags,
2128 Prefix: servicePrefix,
2129 Command: msg.Command,
2130 Params: []string{name, text},
2131 }
2132 dc.srv.forEachUser(func(u *user) {
2133 u.events <- eventBroadcast{broadcastMsg}
2134 })
2135 continue
2136 }
2137
2138 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2139 dc.SendMessage(&irc.Message{
2140 Tags: msg.Tags.Copy(),
2141 Prefix: dc.prefix(),
2142 Command: msg.Command,
2143 Params: []string{name, text},
2144 })
2145 continue
2146 }
2147
2148 if msg.Command == "PRIVMSG" && casemapASCII(name) == serviceNickCM {
2149 if dc.caps["echo-message"] {
2150 echoTags := tags.Copy()
2151 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2152 dc.SendMessage(&irc.Message{
2153 Tags: echoTags,
2154 Prefix: dc.prefix(),
2155 Command: msg.Command,
2156 Params: []string{name, text},
2157 })
2158 }
2159 handleServicePRIVMSG(ctx, dc, text)
2160 continue
2161 }
2162
2163 uc, upstreamName, err := dc.unmarshalEntity(name)
2164 if err != nil {
2165 return err
2166 }
2167
2168 if msg.Command == "PRIVMSG" && uc.network.casemap(upstreamName) == "nickserv" {
2169 dc.handleNickServPRIVMSG(ctx, uc, text)
2170 }
2171
2172 unmarshaledText := text
2173 if uc.isChannel(upstreamName) {
2174 unmarshaledText = dc.unmarshalText(uc, text)
2175 }
2176 uc.SendMessageLabeled(dc.id, &irc.Message{
2177 Tags: tags,
2178 Command: msg.Command,
2179 Params: []string{upstreamName, unmarshaledText},
2180 })
2181
2182 echoTags := tags.Copy()
2183 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2184 if uc.account != "" {
2185 echoTags["account"] = irc.TagValue(uc.account)
2186 }
2187 echoMsg := &irc.Message{
2188 Tags: echoTags,
2189 Prefix: &irc.Prefix{Name: uc.nick},
2190 Command: msg.Command,
2191 Params: []string{upstreamName, text},
2192 }
2193 uc.produce(upstreamName, echoMsg, dc)
2194
2195 uc.updateChannelAutoDetach(upstreamName)
2196 }
2197 case "TAGMSG":
2198 var targetsStr string
2199 if err := parseMessageParams(msg, &targetsStr); err != nil {
2200 return err
2201 }
2202 tags := copyClientTags(msg.Tags)
2203
2204 for _, name := range strings.Split(targetsStr, ",") {
2205 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2206 dc.SendMessage(&irc.Message{
2207 Tags: msg.Tags.Copy(),
2208 Prefix: dc.prefix(),
2209 Command: "TAGMSG",
2210 Params: []string{name},
2211 })
2212 continue
2213 }
2214
2215 if casemapASCII(name) == serviceNickCM {
2216 continue
2217 }
2218
2219 uc, upstreamName, err := dc.unmarshalEntity(name)
2220 if err != nil {
2221 return err
2222 }
2223 if _, ok := uc.caps["message-tags"]; !ok {
2224 continue
2225 }
2226
2227 uc.SendMessageLabeled(dc.id, &irc.Message{
2228 Tags: tags,
2229 Command: "TAGMSG",
2230 Params: []string{upstreamName},
2231 })
2232
2233 uc.updateChannelAutoDetach(upstreamName)
2234 }
2235 case "INVITE":
2236 var user, channel string
2237 if err := parseMessageParams(msg, &user, &channel); err != nil {
2238 return err
2239 }
2240
2241 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
2242 if err != nil {
2243 return err
2244 }
2245
2246 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
2247 if err != nil {
2248 return err
2249 }
2250
2251 if ucChannel != ucUser {
2252 return ircError{&irc.Message{
2253 Command: irc.ERR_USERNOTINCHANNEL,
2254 Params: []string{dc.nick, user, channel, "They are on another network"},
2255 }}
2256 }
2257 uc := ucChannel
2258
2259 uc.SendMessageLabeled(dc.id, &irc.Message{
2260 Command: "INVITE",
2261 Params: []string{upstreamUser, upstreamChannel},
2262 })
2263 case "MONITOR":
2264 // MONITOR is unsupported in multi-upstream mode
2265 uc := dc.upstream()
2266 if uc == nil {
2267 return newUnknownCommandError(msg.Command)
2268 }
2269
2270 var subcommand string
2271 if err := parseMessageParams(msg, &subcommand); err != nil {
2272 return err
2273 }
2274
2275 switch strings.ToUpper(subcommand) {
2276 case "+", "-":
2277 var targets string
2278 if err := parseMessageParams(msg, nil, &targets); err != nil {
2279 return err
2280 }
2281 for _, target := range strings.Split(targets, ",") {
2282 if subcommand == "+" {
2283 // Hard limit, just to avoid having downstreams fill our map
2284 if len(dc.monitored.innerMap) >= 1000 {
2285 dc.SendMessage(&irc.Message{
2286 Prefix: dc.srv.prefix(),
2287 Command: irc.ERR_MONLISTFULL,
2288 Params: []string{dc.nick, "1000", target, "Bouncer monitor list is full"},
2289 })
2290 continue
2291 }
2292
2293 dc.monitored.SetValue(target, nil)
2294
2295 if uc.monitored.Has(target) {
2296 cmd := irc.RPL_MONOFFLINE
2297 if online := uc.monitored.Value(target); online {
2298 cmd = irc.RPL_MONONLINE
2299 }
2300
2301 dc.SendMessage(&irc.Message{
2302 Prefix: dc.srv.prefix(),
2303 Command: cmd,
2304 Params: []string{dc.nick, target},
2305 })
2306 }
2307 } else {
2308 dc.monitored.Delete(target)
2309 }
2310 }
2311 uc.updateMonitor()
2312 case "C": // clear
2313 dc.monitored = newCasemapMap(0)
2314 uc.updateMonitor()
2315 case "L": // list
2316 // TODO: be less lazy and pack the list
2317 for _, entry := range dc.monitored.innerMap {
2318 dc.SendMessage(&irc.Message{
2319 Prefix: dc.srv.prefix(),
2320 Command: irc.RPL_MONLIST,
2321 Params: []string{dc.nick, entry.originalKey},
2322 })
2323 }
2324 dc.SendMessage(&irc.Message{
2325 Prefix: dc.srv.prefix(),
2326 Command: irc.RPL_ENDOFMONLIST,
2327 Params: []string{dc.nick, "End of MONITOR list"},
2328 })
2329 case "S": // status
2330 // TODO: be less lazy and pack the lists
2331 for _, entry := range dc.monitored.innerMap {
2332 target := entry.originalKey
2333
2334 cmd := irc.RPL_MONOFFLINE
2335 if online := uc.monitored.Value(target); online {
2336 cmd = irc.RPL_MONONLINE
2337 }
2338
2339 dc.SendMessage(&irc.Message{
2340 Prefix: dc.srv.prefix(),
2341 Command: cmd,
2342 Params: []string{dc.nick, target},
2343 })
2344 }
2345 }
2346 case "CHATHISTORY":
2347 var subcommand string
2348 if err := parseMessageParams(msg, &subcommand); err != nil {
2349 return err
2350 }
2351 var target, limitStr string
2352 var boundsStr [2]string
2353 switch subcommand {
2354 case "AFTER", "BEFORE":
2355 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &limitStr); err != nil {
2356 return err
2357 }
2358 case "BETWEEN":
2359 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2360 return err
2361 }
2362 case "TARGETS":
2363 if dc.network == nil {
2364 // Either an unbound bouncer network, in which case we should return no targets,
2365 // or a multi-upstream downstream, but we don't support CHATHISTORY TARGETS for those yet.
2366 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {})
2367 return nil
2368 }
2369 if err := parseMessageParams(msg, nil, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2370 return err
2371 }
2372 default:
2373 // TODO: support LATEST, AROUND
2374 return ircError{&irc.Message{
2375 Command: "FAIL",
2376 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, "Unknown command"},
2377 }}
2378 }
2379
2380 // We don't save history for our service
2381 if casemapASCII(target) == serviceNickCM {
2382 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {})
2383 return nil
2384 }
2385
2386 store, ok := dc.user.msgStore.(chatHistoryMessageStore)
2387 if !ok {
2388 return ircError{&irc.Message{
2389 Command: irc.ERR_UNKNOWNCOMMAND,
2390 Params: []string{dc.nick, "CHATHISTORY", "Unknown command"},
2391 }}
2392 }
2393
2394 network, entity, err := dc.unmarshalEntityNetwork(target)
2395 if err != nil {
2396 return err
2397 }
2398 entity = network.casemap(entity)
2399
2400 // TODO: support msgid criteria
2401 var bounds [2]time.Time
2402 bounds[0] = parseChatHistoryBound(boundsStr[0])
2403 if bounds[0].IsZero() {
2404 return ircError{&irc.Message{
2405 Command: "FAIL",
2406 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[0], "Invalid first bound"},
2407 }}
2408 }
2409
2410 if boundsStr[1] != "" {
2411 bounds[1] = parseChatHistoryBound(boundsStr[1])
2412 if bounds[1].IsZero() {
2413 return ircError{&irc.Message{
2414 Command: "FAIL",
2415 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[1], "Invalid second bound"},
2416 }}
2417 }
2418 }
2419
2420 limit, err := strconv.Atoi(limitStr)
2421 if err != nil || limit < 0 || limit > chatHistoryLimit {
2422 return ircError{&irc.Message{
2423 Command: "FAIL",
2424 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, limitStr, "Invalid limit"},
2425 }}
2426 }
2427
2428 eventPlayback := dc.caps["draft/event-playback"]
2429
2430 var history []*irc.Message
2431 switch subcommand {
2432 case "BEFORE":
2433 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], time.Time{}, limit, eventPlayback)
2434 case "AFTER":
2435 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], time.Now(), limit, eventPlayback)
2436 case "BETWEEN":
2437 if bounds[0].Before(bounds[1]) {
2438 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
2439 } else {
2440 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
2441 }
2442 case "TARGETS":
2443 // TODO: support TARGETS in multi-upstream mode
2444 targets, err := store.ListTargets(ctx, &network.Network, bounds[0], bounds[1], limit, eventPlayback)
2445 if err != nil {
2446 dc.logger.Printf("failed fetching targets for chathistory: %v", err)
2447 return ircError{&irc.Message{
2448 Command: "FAIL",
2449 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, "Failed to retrieve targets"},
2450 }}
2451 }
2452
2453 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {
2454 for _, target := range targets {
2455 if ch := network.channels.Value(target.Name); ch != nil && ch.Detached {
2456 continue
2457 }
2458
2459 dc.SendMessage(&irc.Message{
2460 Tags: irc.Tags{"batch": batchRef},
2461 Prefix: dc.srv.prefix(),
2462 Command: "CHATHISTORY",
2463 Params: []string{"TARGETS", target.Name, target.LatestMessage.UTC().Format(serverTimeLayout)},
2464 })
2465 }
2466 })
2467
2468 return nil
2469 }
2470 if err != nil {
2471 dc.logger.Printf("failed fetching %q messages for chathistory: %v", target, err)
2472 return newChatHistoryError(subcommand, target)
2473 }
2474
2475 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {
2476 for _, msg := range history {
2477 msg.Tags["batch"] = batchRef
2478 dc.SendMessage(dc.marshalMessage(msg, network))
2479 }
2480 })
2481 case "BOUNCER":
2482 var subcommand string
2483 if err := parseMessageParams(msg, &subcommand); err != nil {
2484 return err
2485 }
2486
2487 switch strings.ToUpper(subcommand) {
2488 case "BIND":
2489 return ircError{&irc.Message{
2490 Command: "FAIL",
2491 Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind to a network after registration"},
2492 }}
2493 case "LISTNETWORKS":
2494 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
2495 dc.user.forEachNetwork(func(network *network) {
2496 idStr := fmt.Sprintf("%v", network.ID)
2497 attrs := getNetworkAttrs(network)
2498 dc.SendMessage(&irc.Message{
2499 Tags: irc.Tags{"batch": batchRef},
2500 Prefix: dc.srv.prefix(),
2501 Command: "BOUNCER",
2502 Params: []string{"NETWORK", idStr, attrs.String()},
2503 })
2504 })
2505 })
2506 case "ADDNETWORK":
2507 var attrsStr string
2508 if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
2509 return err
2510 }
2511 attrs := irc.ParseTags(attrsStr)
2512
2513 record := &Network{Nick: dc.nick, Enabled: true}
2514 if err := updateNetworkAttrs(record, attrs, subcommand); err != nil {
2515 return err
2516 }
2517
2518 if record.Nick == dc.user.Username {
2519 record.Nick = ""
2520 }
2521 if record.Realname == dc.user.Realname {
2522 record.Realname = ""
2523 }
2524
2525 network, err := dc.user.createNetwork(ctx, record)
2526 if err != nil {
2527 return ircError{&irc.Message{
2528 Command: "FAIL",
2529 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
2530 }}
2531 }
2532
2533 dc.SendMessage(&irc.Message{
2534 Prefix: dc.srv.prefix(),
2535 Command: "BOUNCER",
2536 Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
2537 })
2538 case "CHANGENETWORK":
2539 var idStr, attrsStr string
2540 if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
2541 return err
2542 }
2543 id, err := parseBouncerNetID(subcommand, idStr)
2544 if err != nil {
2545 return err
2546 }
2547 attrs := irc.ParseTags(attrsStr)
2548
2549 net := dc.user.getNetworkByID(id)
2550 if net == nil {
2551 return ircError{&irc.Message{
2552 Command: "FAIL",
2553 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2554 }}
2555 }
2556
2557 record := net.Network // copy network record because we'll mutate it
2558 if err := updateNetworkAttrs(&record, attrs, subcommand); err != nil {
2559 return err
2560 }
2561
2562 if record.Nick == dc.user.Username {
2563 record.Nick = ""
2564 }
2565 if record.Realname == dc.user.Realname {
2566 record.Realname = ""
2567 }
2568
2569 _, err = dc.user.updateNetwork(ctx, &record)
2570 if err != nil {
2571 return ircError{&irc.Message{
2572 Command: "FAIL",
2573 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
2574 }}
2575 }
2576
2577 dc.SendMessage(&irc.Message{
2578 Prefix: dc.srv.prefix(),
2579 Command: "BOUNCER",
2580 Params: []string{"CHANGENETWORK", idStr},
2581 })
2582 case "DELNETWORK":
2583 var idStr string
2584 if err := parseMessageParams(msg, nil, &idStr); err != nil {
2585 return err
2586 }
2587 id, err := parseBouncerNetID(subcommand, idStr)
2588 if err != nil {
2589 return err
2590 }
2591
2592 net := dc.user.getNetworkByID(id)
2593 if net == nil {
2594 return ircError{&irc.Message{
2595 Command: "FAIL",
2596 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
2597 }}
2598 }
2599
2600 if err := dc.user.deleteNetwork(ctx, net.ID); err != nil {
2601 return err
2602 }
2603
2604 dc.SendMessage(&irc.Message{
2605 Prefix: dc.srv.prefix(),
2606 Command: "BOUNCER",
2607 Params: []string{"DELNETWORK", idStr},
2608 })
2609 default:
2610 return ircError{&irc.Message{
2611 Command: "FAIL",
2612 Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
2613 }}
2614 }
2615 default:
2616 dc.logger.Printf("unhandled message: %v", msg)
2617
2618 // Only forward unknown commands in single-upstream mode
2619 uc := dc.upstream()
2620 if uc == nil {
2621 return newUnknownCommandError(msg.Command)
2622 }
2623
2624 uc.SendMessageLabeled(dc.id, msg)
2625 }
2626 return nil
2627}
2628
2629func (dc *downstreamConn) handleNickServPRIVMSG(ctx context.Context, uc *upstreamConn, text string) {
2630 username, password, ok := parseNickServCredentials(text, uc.nick)
2631 if !ok {
2632 return
2633 }
2634
2635 // User may have e.g. EXTERNAL mechanism configured. We do not want to
2636 // automatically erase the key pair or any other credentials.
2637 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
2638 return
2639 }
2640
2641 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
2642 n := uc.network
2643 n.SASL.Mechanism = "PLAIN"
2644 n.SASL.Plain.Username = username
2645 n.SASL.Plain.Password = password
2646 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
2647 dc.logger.Printf("failed to save NickServ credentials: %v", err)
2648 }
2649}
2650
2651func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
2652 fields := strings.Fields(text)
2653 if len(fields) < 2 {
2654 return "", "", false
2655 }
2656 cmd := strings.ToUpper(fields[0])
2657 params := fields[1:]
2658 switch cmd {
2659 case "REGISTER":
2660 username = nick
2661 password = params[0]
2662 case "IDENTIFY":
2663 if len(params) == 1 {
2664 username = nick
2665 password = params[0]
2666 } else {
2667 username = params[0]
2668 password = params[1]
2669 }
2670 case "SET":
2671 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
2672 username = nick
2673 password = params[1]
2674 }
2675 default:
2676 return "", "", false
2677 }
2678 return username, password, true
2679}
Note: See TracBrowser for help on using the repository browser.