source: code/trunk/downstream.go@ 704

Last change on this file since 704 was 704, checked in by contact, 4 years ago

Add timeout for downstream connection registration
File size: 68.8 KB
RevLine 
[98]1package soju
[13]2
3import (
[652]4 "context"
[91]5 "crypto/tls"
[112]6 "encoding/base64"
[655]7 "errors"
[13]8 "fmt"
9 "io"
10 "net"
[108]11 "strconv"
[39]12 "strings"
[91]13 "time"
[13]14
[112]15 "github.com/emersion/go-sasl"
[85]16 "golang.org/x/crypto/bcrypt"
[13]17 "gopkg.in/irc.v3"
18)
19
20type ircError struct {
21 Message *irc.Message
22}
23
[85]24func (err ircError) Error() string {
25 return err.Message.String()
26}
27
[13]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
[319]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
[85]57var errAuthFailed = ircError{&irc.Message{
58 Command: irc.ERR_PASSWDMISMATCH,
59 Params: []string{"*", "Invalid username or password"},
60}}
[13]61
[535]62func parseBouncerNetID(subcommand, s string) (int64, error) {
[532]63 id, err := strconv.ParseInt(s, 10, 64)
64 if err != nil {
65 return 0, ircError{&irc.Message{
66 Command: "FAIL",
[535]67 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, s, "Invalid network ID"},
[532]68 }}
69 }
70 return id, nil
71}
72
[654]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
[535]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),
[664]105 "nickname": irc.TagValue(GetNick(&network.user.User, &network.Network)),
[535]106 }
107
108 if network.Username != "" {
109 attrs["username"] = irc.TagValue(network.Username)
110 }
[568]111 if realname := GetRealname(&network.user.User, &network.Network); realname != "" {
112 attrs["realname"] = irc.TagValue(realname)
[535]113 }
114
[654]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
[535]159 default:
[654]160 return ircError{&irc.Message{
161 Command: "FAIL",
162 Params: []string{"BOUNCER", "UNKNOWN_ATTRIBUTE", subcommand, k, "Unknown attribute"},
163 }}
[535]164 }
[654]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 }}
[535]174 }
175 }
176
[654]177 return nil
[535]178}
179
[411]180// ' ' and ':' break the IRC message wire format, '@' and '!' break prefixes,
[565]181// '*' and '?' break masks, '$' breaks server masks in PRIVMSG/NOTICE
182const illegalNickChars = " :@!*?$"
[404]183
[275]184// permanentDownstreamCaps is the list of always-supported downstream
185// capabilities.
186var permanentDownstreamCaps = map[string]string{
[535]187 "batch": "",
188 "cap-notify": "",
189 "echo-message": "",
190 "invite-notify": "",
191 "message-tags": "",
192 "sasl": "PLAIN",
193 "server-time": "",
[540]194 "setname": "",
[535]195
196 "soju.im/bouncer-networks": "",
197 "soju.im/bouncer-networks-notify": "",
[275]198}
199
[292]200// needAllDownstreamCaps is the list of downstream capabilities that
201// require support from all upstreams to be enabled
202var needAllDownstreamCaps = map[string]string{
[648]203 "account-notify": "",
204 "account-tag": "",
205 "away-notify": "",
206 "extended-join": "",
207 "multi-prefix": "",
[685]208
209 "draft/extended-monitor": "",
[292]210}
211
[463]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{
[580]217 "AWAYLEN": true,
218 "BOT": true,
219 "CHANLIMIT": true,
220 "CHANMODES": true,
221 "CHANNELLEN": true,
222 "CHANTYPES": true,
223 "CLIENTTAGDENY": true,
[683]224 "ELIST": true,
[580]225 "EXCEPTS": true,
226 "EXTBAN": true,
227 "HOSTLEN": true,
228 "INVEX": true,
229 "KICKLEN": true,
230 "MAXLIST": true,
231 "MAXTARGETS": true,
232 "MODES": true,
[684]233 "MONITOR": true,
[580]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,
[660]243 "WHOX": true,
[463]244}
245
[13]246type downstreamConn struct {
[210]247 conn
[22]248
[210]249 id uint64
250
[693]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 isMultiUpstream bool
[105]263
[590]264 negotiatingCaps bool
[108]265 capVersion int
[275]266 supportedCaps map[string]string
[236]267 caps map[string]bool
[108]268
[551]269 lastBatchRef uint64
270
[684]271 monitored casemapMap
272
[112]273 saslServer sasl.Server
[13]274}
275
[347]276func newDownstreamConn(srv *Server, ic ircConn, id uint64) *downstreamConn {
277 remoteAddr := ic.RemoteAddr().String()
[323]278 logger := &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", remoteAddr)}
[398]279 options := connOptions{Logger: logger}
[55]280 dc := &downstreamConn{
[398]281 conn: *newConn(srv, ic, &options),
[276]282 id: id,
[275]283 supportedCaps: make(map[string]string),
[276]284 caps: make(map[string]bool),
[684]285 monitored: newCasemapMap(0),
[22]286 }
[323]287 dc.hostname = remoteAddr
[141]288 if host, _, err := net.SplitHostPort(dc.hostname); err == nil {
289 dc.hostname = host
290 }
[275]291 for k, v := range permanentDownstreamCaps {
292 dc.supportedCaps[k] = v
293 }
[691]294 // TODO: this is racy, we should only enable chathistory after
295 // authentication and then check that user.msgStore implements
296 // chatHistoryMessageStore
297 if srv.Config().LogPath != "" {
[319]298 dc.supportedCaps["draft/chathistory"] = ""
299 }
[55]300 return dc
[22]301}
302
[55]303func (dc *downstreamConn) prefix() *irc.Prefix {
[27]304 return &irc.Prefix{
[55]305 Name: dc.nick,
[184]306 User: dc.user.Username,
[141]307 Host: dc.hostname,
[27]308 }
309}
310
[90]311func (dc *downstreamConn) forEachNetwork(f func(*network)) {
312 if dc.network != nil {
313 f(dc.network)
[693]314 } else if dc.isMultiUpstream {
[90]315 dc.user.forEachNetwork(f)
316 }
317}
318
[73]319func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
[693]320 if dc.network == nil && !dc.isMultiUpstream {
[532]321 return
322 }
[73]323 dc.user.forEachUpstream(func(uc *upstreamConn) {
[77]324 if dc.network != nil && uc.network != dc.network {
[73]325 return
326 }
327 f(uc)
328 })
329}
330
[89]331// upstream returns the upstream connection, if any. If there are zero or if
332// there are multiple upstream connections, it returns nil.
333func (dc *downstreamConn) upstream() *upstreamConn {
334 if dc.network == nil {
335 return nil
336 }
[279]337 return dc.network.conn
[89]338}
339
[260]340func isOurNick(net *network, nick string) bool {
341 // TODO: this doesn't account for nick changes
342 if net.conn != nil {
[478]343 return net.casemap(nick) == net.conn.nickCM
[260]344 }
345 // We're not currently connected to the upstream connection, so we don't
346 // know whether this name is our nickname. Best-effort: use the network's
347 // configured nickname and hope it was the one being used when we were
348 // connected.
[664]349 return net.casemap(nick) == net.casemap(GetNick(&net.user.User, &net.Network))
[260]350}
351
[249]352// marshalEntity converts an upstream entity name (ie. channel or nick) into a
353// downstream entity name.
354//
355// This involves adding a "/<network>" suffix if the entity isn't the current
356// user.
[260]357func (dc *downstreamConn) marshalEntity(net *network, name string) string {
[289]358 if isOurNick(net, name) {
359 return dc.nick
360 }
[478]361 name = partialCasemap(net.casemap, name)
[257]362 if dc.network != nil {
[260]363 if dc.network != net {
[258]364 panic("soju: tried to marshal an entity for another network")
365 }
[257]366 return name
[119]367 }
[260]368 return name + "/" + net.GetName()
[119]369}
370
[260]371func (dc *downstreamConn) marshalUserPrefix(net *network, prefix *irc.Prefix) *irc.Prefix {
372 if isOurNick(net, prefix.Name) {
[257]373 return dc.prefix()
374 }
[478]375 prefix.Name = partialCasemap(net.casemap, prefix.Name)
[130]376 if dc.network != nil {
[260]377 if dc.network != net {
[258]378 panic("soju: tried to marshal a user prefix for another network")
379 }
[257]380 return prefix
[119]381 }
[257]382 return &irc.Prefix{
[260]383 Name: prefix.Name + "/" + net.GetName(),
[257]384 User: prefix.User,
385 Host: prefix.Host,
386 }
[119]387}
388
[584]389// unmarshalEntityNetwork converts a downstream entity name (ie. channel or
390// nick) into an upstream entity name.
[249]391//
392// This involves removing the "/<network>" suffix.
[584]393func (dc *downstreamConn) unmarshalEntityNetwork(name string) (*network, string, error) {
[464]394 if dc.network != nil {
[584]395 return dc.network, name, nil
[464]396 }
[89]397
[584]398 var net *network
[119]399 if i := strings.LastIndexByte(name, '/'); i >= 0 {
[127]400 network := name[i+1:]
[119]401 name = name[:i]
402
[584]403 for _, n := range dc.user.networks {
404 if network == n.GetName() {
405 net = n
406 break
[119]407 }
[584]408 }
[119]409 }
410
[584]411 if net == nil {
[73]412 return nil, "", ircError{&irc.Message{
413 Command: irc.ERR_NOSUCHCHANNEL,
[584]414 Params: []string{name, "Missing network suffix in name"},
[73]415 }}
[69]416 }
[584]417
418 return net, name, nil
[69]419}
420
[584]421// unmarshalEntity is the same as unmarshalEntityNetwork, but returns the
422// upstream connection and fails if the upstream is disconnected.
423func (dc *downstreamConn) unmarshalEntity(name string) (*upstreamConn, string, error) {
424 net, name, err := dc.unmarshalEntityNetwork(name)
425 if err != nil {
426 return nil, "", err
427 }
428
429 if net.conn == nil {
430 return nil, "", ircError{&irc.Message{
431 Command: irc.ERR_NOSUCHCHANNEL,
432 Params: []string{name, "Disconnected from upstream network"},
433 }}
434 }
435
436 return net.conn, name, nil
437}
438
[268]439func (dc *downstreamConn) unmarshalText(uc *upstreamConn, text string) string {
440 if dc.upstream() != nil {
441 return text
442 }
443 // TODO: smarter parsing that ignores URLs
444 return strings.ReplaceAll(text, "/"+uc.network.GetName(), "")
445}
446
[165]447func (dc *downstreamConn) readMessages(ch chan<- event) error {
[22]448 for {
[210]449 msg, err := dc.ReadMessage()
[655]450 if errors.Is(err, io.EOF) {
[22]451 break
452 } else if err != nil {
453 return fmt.Errorf("failed to read IRC command: %v", err)
454 }
455
[165]456 ch <- eventDownstreamMessage{msg, dc}
[22]457 }
458
[45]459 return nil
[22]460}
461
[230]462// SendMessage sends an outgoing message.
463//
464// This can only called from the user goroutine.
[55]465func (dc *downstreamConn) SendMessage(msg *irc.Message) {
[230]466 if !dc.caps["message-tags"] {
[303]467 if msg.Command == "TAGMSG" {
468 return
469 }
[216]470 msg = msg.Copy()
471 for name := range msg.Tags {
472 supported := false
473 switch name {
474 case "time":
[230]475 supported = dc.caps["server-time"]
[559]476 case "account":
477 supported = dc.caps["account"]
[216]478 }
479 if !supported {
480 delete(msg.Tags, name)
481 }
482 }
483 }
[551]484 if !dc.caps["batch"] && msg.Tags["batch"] != "" {
485 msg = msg.Copy()
486 delete(msg.Tags, "batch")
487 }
[419]488 if msg.Command == "JOIN" && !dc.caps["extended-join"] {
489 msg.Params = msg.Params[:1]
490 }
[540]491 if msg.Command == "SETNAME" && !dc.caps["setname"] {
492 return
493 }
[649]494 if msg.Command == "AWAY" && !dc.caps["away-notify"] {
495 return
496 }
[648]497 if msg.Command == "ACCOUNT" && !dc.caps["account-notify"] {
498 return
499 }
[216]500
[210]501 dc.conn.SendMessage(msg)
[54]502}
503
[551]504func (dc *downstreamConn) SendBatch(typ string, params []string, tags irc.Tags, f func(batchRef irc.TagValue)) {
505 dc.lastBatchRef++
506 ref := fmt.Sprintf("%v", dc.lastBatchRef)
507
508 if dc.caps["batch"] {
509 dc.SendMessage(&irc.Message{
510 Tags: tags,
511 Prefix: dc.srv.prefix(),
512 Command: "BATCH",
513 Params: append([]string{"+" + ref, typ}, params...),
514 })
515 }
516
517 f(irc.TagValue(ref))
518
519 if dc.caps["batch"] {
520 dc.SendMessage(&irc.Message{
521 Prefix: dc.srv.prefix(),
522 Command: "BATCH",
523 Params: []string{"-" + ref},
524 })
525 }
526}
527
[428]528// sendMessageWithID sends an outgoing message with the specified internal ID.
529func (dc *downstreamConn) sendMessageWithID(msg *irc.Message, id string) {
530 dc.SendMessage(msg)
531
[665]532 if id == "" || !dc.messageSupportsBacklog(msg) {
[428]533 return
534 }
535
536 dc.sendPing(id)
537}
538
539// advanceMessageWithID advances history to the specified message ID without
540// sending a message. This is useful e.g. for self-messages when echo-message
541// isn't enabled.
542func (dc *downstreamConn) advanceMessageWithID(msg *irc.Message, id string) {
[665]543 if id == "" || !dc.messageSupportsBacklog(msg) {
[428]544 return
545 }
546
547 dc.sendPing(id)
548}
549
550// ackMsgID acknowledges that a message has been received.
551func (dc *downstreamConn) ackMsgID(id string) {
[488]552 netID, entity, err := parseMsgID(id, nil)
[428]553 if err != nil {
554 dc.logger.Printf("failed to ACK message ID %q: %v", id, err)
555 return
556 }
557
[440]558 network := dc.user.getNetworkByID(netID)
[428]559 if network == nil {
560 return
561 }
562
[485]563 network.delivered.StoreID(entity, dc.clientName, id)
[428]564}
565
566func (dc *downstreamConn) sendPing(msgID string) {
[488]567 token := "soju-msgid-" + msgID
[428]568 dc.SendMessage(&irc.Message{
569 Command: "PING",
570 Params: []string{token},
571 })
572}
573
574func (dc *downstreamConn) handlePong(token string) {
575 if !strings.HasPrefix(token, "soju-msgid-") {
576 dc.logger.Printf("received unrecognized PONG token %q", token)
577 return
578 }
[488]579 msgID := strings.TrimPrefix(token, "soju-msgid-")
[428]580 dc.ackMsgID(msgID)
581}
582
[245]583// marshalMessage re-formats a message coming from an upstream connection so
584// that it's suitable for being sent on this downstream connection. Only
[665]585// messages that may appear in logs are supported, except MODE messages which
586// may only appear in single-upstream mode.
[261]587func (dc *downstreamConn) marshalMessage(msg *irc.Message, net *network) *irc.Message {
[686]588 msg = msg.Copy()
589 msg.Prefix = dc.marshalUserPrefix(net, msg.Prefix)
590
[665]591 if dc.network != nil {
592 return msg
593 }
594
[227]595 switch msg.Command {
[303]596 case "PRIVMSG", "NOTICE", "TAGMSG":
[261]597 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
[245]598 case "NICK":
599 // Nick change for another user
[261]600 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
[245]601 case "JOIN", "PART":
[261]602 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
[245]603 case "KICK":
[261]604 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
605 msg.Params[1] = dc.marshalEntity(net, msg.Params[1])
[245]606 case "TOPIC":
[261]607 msg.Params[0] = dc.marshalEntity(net, msg.Params[0])
[540]608 case "QUIT", "SETNAME":
[262]609 // This space is intentionally left blank
[227]610 default:
611 panic(fmt.Sprintf("unexpected %q message", msg.Command))
612 }
613
[245]614 return msg
[227]615}
616
[704]617func (dc *downstreamConn) handleMessage(ctx context.Context, msg *irc.Message) error {
618 ctx, cancel := dc.conn.NewContext(ctx)
[702]619 defer cancel()
620
[703]621 ctx, cancel = context.WithTimeout(ctx, handleDownstreamMessageTimeout)
622 defer cancel()
623
[13]624 switch msg.Command {
[28]625 case "QUIT":
[55]626 return dc.Close()
[13]627 default:
[55]628 if dc.registered {
[702]629 return dc.handleMessageRegistered(ctx, msg)
[13]630 } else {
[702]631 return dc.handleMessageUnregistered(ctx, msg)
[13]632 }
633 }
634}
635
[702]636func (dc *downstreamConn) handleMessageUnregistered(ctx context.Context, msg *irc.Message) error {
[13]637 switch msg.Command {
638 case "NICK":
[117]639 var nick string
640 if err := parseMessageParams(msg, &nick); err != nil {
[43]641 return err
[13]642 }
[404]643 if strings.ContainsAny(nick, illegalNickChars) {
644 return ircError{&irc.Message{
645 Command: irc.ERR_ERRONEUSNICKNAME,
646 Params: []string{dc.nick, nick, "contains illegal characters"},
647 }}
648 }
[478]649 nickCM := casemapASCII(nick)
650 if nickCM == serviceNickCM {
[117]651 return ircError{&irc.Message{
652 Command: irc.ERR_NICKNAMEINUSE,
653 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
654 }}
655 }
656 dc.nick = nick
[478]657 dc.nickCM = nickCM
[13]658 case "USER":
[117]659 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
[43]660 return err
[13]661 }
[85]662 case "PASS":
663 if err := parseMessageParams(msg, &dc.password); err != nil {
664 return err
665 }
[108]666 case "CAP":
667 var subCmd string
668 if err := parseMessageParams(msg, &subCmd); err != nil {
669 return err
670 }
671 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
672 return err
673 }
[112]674 case "AUTHENTICATE":
[230]675 if !dc.caps["sasl"] {
[112]676 return ircError{&irc.Message{
[125]677 Command: irc.ERR_SASLFAIL,
[112]678 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
679 }}
680 }
681 if len(msg.Params) == 0 {
682 return ircError{&irc.Message{
[125]683 Command: irc.ERR_SASLFAIL,
[112]684 Params: []string{"*", "Missing AUTHENTICATE argument"},
685 }}
686 }
687 if dc.nick == "" {
688 return ircError{&irc.Message{
[125]689 Command: irc.ERR_SASLFAIL,
[112]690 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
691 }}
692 }
693
694 var resp []byte
[653]695 if msg.Params[0] == "*" {
696 dc.saslServer = nil
697 return ircError{&irc.Message{
698 Command: irc.ERR_SASLABORTED,
699 Params: []string{"*", "SASL authentication aborted"},
700 }}
701 } else if dc.saslServer == nil {
[112]702 mech := strings.ToUpper(msg.Params[0])
703 switch mech {
704 case "PLAIN":
705 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
[700]706 // TODO: we can't use the command context here, because it
707 // gets cancelled once the command handler returns. SASL
708 // might take multiple AUTHENTICATE commands to complete.
709 return dc.authenticate(context.TODO(), username, password)
[112]710 }))
711 default:
712 return ircError{&irc.Message{
[125]713 Command: irc.ERR_SASLFAIL,
[112]714 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
715 }}
716 }
717 } else if msg.Params[0] == "+" {
718 resp = nil
719 } else {
720 // TODO: multi-line messages
721 var err error
722 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
723 if err != nil {
724 dc.saslServer = nil
725 return ircError{&irc.Message{
[125]726 Command: irc.ERR_SASLFAIL,
[112]727 Params: []string{"*", "Invalid base64-encoded response"},
728 }}
729 }
730 }
731
732 challenge, done, err := dc.saslServer.Next(resp)
733 if err != nil {
734 dc.saslServer = nil
735 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
736 return ircError{&irc.Message{
[125]737 Command: irc.ERR_SASLFAIL,
[112]738 Params: []string{"*", ircErr.Message.Params[1]},
739 }}
740 }
741 dc.SendMessage(&irc.Message{
742 Prefix: dc.srv.prefix(),
[125]743 Command: irc.ERR_SASLFAIL,
[112]744 Params: []string{"*", "SASL error"},
745 })
746 return fmt.Errorf("SASL authentication failed: %v", err)
747 } else if done {
748 dc.saslServer = nil
749 dc.SendMessage(&irc.Message{
750 Prefix: dc.srv.prefix(),
[125]751 Command: irc.RPL_LOGGEDIN,
[306]752 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
[112]753 })
754 dc.SendMessage(&irc.Message{
755 Prefix: dc.srv.prefix(),
[125]756 Command: irc.RPL_SASLSUCCESS,
[112]757 Params: []string{dc.nick, "SASL authentication successful"},
758 })
759 } else {
760 challengeStr := "+"
[135]761 if len(challenge) > 0 {
[112]762 challengeStr = base64.StdEncoding.EncodeToString(challenge)
763 }
764
765 // TODO: multi-line messages
766 dc.SendMessage(&irc.Message{
767 Prefix: dc.srv.prefix(),
768 Command: "AUTHENTICATE",
769 Params: []string{challengeStr},
770 })
771 }
[532]772 case "BOUNCER":
773 var subcommand string
774 if err := parseMessageParams(msg, &subcommand); err != nil {
775 return err
776 }
777
778 switch strings.ToUpper(subcommand) {
779 case "BIND":
780 var idStr string
781 if err := parseMessageParams(msg, nil, &idStr); err != nil {
782 return err
783 }
784
785 if dc.user == nil {
786 return ircError{&irc.Message{
787 Command: "FAIL",
788 Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
789 }}
790 }
791
[535]792 id, err := parseBouncerNetID(subcommand, idStr)
[532]793 if err != nil {
794 return err
795 }
796
797 var match *network
798 dc.user.forEachNetwork(func(net *network) {
799 if net.ID == id {
800 match = net
801 }
802 })
803 if match == nil {
804 return ircError{&irc.Message{
805 Command: "FAIL",
806 Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
807 }}
808 }
809
810 dc.networkName = match.GetName()
811 }
[13]812 default:
[55]813 dc.logger.Printf("unhandled message: %v", msg)
[13]814 return newUnknownCommandError(msg.Command)
815 }
[590]816 if dc.rawUsername != "" && dc.nick != "" && !dc.negotiatingCaps {
[700]817 return dc.register(ctx)
[13]818 }
819 return nil
820}
821
[108]822func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
[111]823 cmd = strings.ToUpper(cmd)
824
[108]825 replyTo := dc.nick
826 if !dc.registered {
827 replyTo = "*"
828 }
829
830 switch cmd {
831 case "LS":
832 if len(args) > 0 {
833 var err error
834 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
835 return err
836 }
837 }
[437]838 if !dc.registered && dc.capVersion >= 302 {
839 // Let downstream show everything it supports, and trim
840 // down the available capabilities when upstreams are
841 // known.
842 for k, v := range needAllDownstreamCaps {
843 dc.supportedCaps[k] = v
844 }
845 }
[108]846
[275]847 caps := make([]string, 0, len(dc.supportedCaps))
848 for k, v := range dc.supportedCaps {
849 if dc.capVersion >= 302 && v != "" {
[276]850 caps = append(caps, k+"="+v)
[275]851 } else {
852 caps = append(caps, k)
853 }
[112]854 }
[108]855
856 // TODO: multi-line replies
857 dc.SendMessage(&irc.Message{
858 Prefix: dc.srv.prefix(),
859 Command: "CAP",
860 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
861 })
862
[275]863 if dc.capVersion >= 302 {
864 // CAP version 302 implicitly enables cap-notify
865 dc.caps["cap-notify"] = true
866 }
867
[108]868 if !dc.registered {
[590]869 dc.negotiatingCaps = true
[108]870 }
871 case "LIST":
872 var caps []string
[521]873 for name, enabled := range dc.caps {
874 if enabled {
875 caps = append(caps, name)
876 }
[108]877 }
878
879 // TODO: multi-line replies
880 dc.SendMessage(&irc.Message{
881 Prefix: dc.srv.prefix(),
882 Command: "CAP",
883 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
884 })
885 case "REQ":
886 if len(args) == 0 {
887 return ircError{&irc.Message{
888 Command: err_invalidcapcmd,
889 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
890 }}
891 }
892
[275]893 // TODO: atomically ack/nak the whole capability set
[108]894 caps := strings.Fields(args[0])
895 ack := true
896 for _, name := range caps {
897 name = strings.ToLower(name)
898 enable := !strings.HasPrefix(name, "-")
899 if !enable {
900 name = strings.TrimPrefix(name, "-")
901 }
902
[275]903 if enable == dc.caps[name] {
[108]904 continue
905 }
906
[275]907 _, ok := dc.supportedCaps[name]
908 if !ok {
[108]909 ack = false
[275]910 break
[108]911 }
[275]912
913 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
914 // cap-notify cannot be disabled with CAP version 302
915 ack = false
916 break
917 }
918
919 dc.caps[name] = enable
[108]920 }
921
922 reply := "NAK"
923 if ack {
924 reply = "ACK"
925 }
926 dc.SendMessage(&irc.Message{
927 Prefix: dc.srv.prefix(),
928 Command: "CAP",
929 Params: []string{replyTo, reply, args[0]},
930 })
[590]931
932 if !dc.registered {
933 dc.negotiatingCaps = true
934 }
[108]935 case "END":
[590]936 dc.negotiatingCaps = false
[108]937 default:
938 return ircError{&irc.Message{
939 Command: err_invalidcapcmd,
940 Params: []string{replyTo, cmd, "Unknown CAP command"},
941 }}
942 }
943 return nil
944}
945
[275]946func (dc *downstreamConn) setSupportedCap(name, value string) {
947 prevValue, hasPrev := dc.supportedCaps[name]
948 changed := !hasPrev || prevValue != value
949 dc.supportedCaps[name] = value
950
951 if !dc.caps["cap-notify"] || !changed {
952 return
953 }
954
955 replyTo := dc.nick
956 if !dc.registered {
957 replyTo = "*"
958 }
959
960 cap := name
961 if value != "" && dc.capVersion >= 302 {
962 cap = name + "=" + value
963 }
964
965 dc.SendMessage(&irc.Message{
966 Prefix: dc.srv.prefix(),
967 Command: "CAP",
968 Params: []string{replyTo, "NEW", cap},
969 })
970}
971
972func (dc *downstreamConn) unsetSupportedCap(name string) {
973 _, hasPrev := dc.supportedCaps[name]
974 delete(dc.supportedCaps, name)
975 delete(dc.caps, name)
976
977 if !dc.caps["cap-notify"] || !hasPrev {
978 return
979 }
980
981 replyTo := dc.nick
982 if !dc.registered {
983 replyTo = "*"
984 }
985
986 dc.SendMessage(&irc.Message{
987 Prefix: dc.srv.prefix(),
988 Command: "CAP",
989 Params: []string{replyTo, "DEL", name},
990 })
991}
992
[276]993func (dc *downstreamConn) updateSupportedCaps() {
[292]994 supportedCaps := make(map[string]bool)
995 for cap := range needAllDownstreamCaps {
996 supportedCaps[cap] = true
997 }
[276]998 dc.forEachUpstream(func(uc *upstreamConn) {
[292]999 for cap, supported := range supportedCaps {
1000 supportedCaps[cap] = supported && uc.caps[cap]
1001 }
[276]1002 })
1003
[292]1004 for cap, supported := range supportedCaps {
1005 if supported {
1006 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
1007 } else {
1008 dc.unsetSupportedCap(cap)
1009 }
[276]1010 }
[665]1011
[691]1012 if _, ok := dc.user.msgStore.(chatHistoryMessageStore); ok && dc.network != nil {
[665]1013 dc.setSupportedCap("draft/event-playback", "")
1014 } else {
1015 dc.unsetSupportedCap("draft/event-playback")
1016 }
[276]1017}
1018
[296]1019func (dc *downstreamConn) updateNick() {
1020 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
1021 dc.SendMessage(&irc.Message{
1022 Prefix: dc.prefix(),
1023 Command: "NICK",
1024 Params: []string{uc.nick},
1025 })
1026 dc.nick = uc.nick
[478]1027 dc.nickCM = casemapASCII(dc.nick)
[296]1028 }
1029}
1030
[540]1031func (dc *downstreamConn) updateRealname() {
1032 if uc := dc.upstream(); uc != nil && uc.realname != dc.realname && dc.caps["setname"] {
1033 dc.SendMessage(&irc.Message{
1034 Prefix: dc.prefix(),
1035 Command: "SETNAME",
1036 Params: []string{uc.realname},
1037 })
1038 dc.realname = uc.realname
1039 }
1040}
1041
[698]1042func sanityCheckServer(ctx context.Context, addr string) error {
[699]1043 ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
[698]1044 defer cancel()
1045
1046 conn, err := new(tls.Dialer).DialContext(ctx, "tcp", addr)
[91]1047 if err != nil {
1048 return err
1049 }
[698]1050
[91]1051 return conn.Close()
1052}
1053
[183]1054func unmarshalUsername(rawUsername string) (username, client, network string) {
[112]1055 username = rawUsername
[183]1056
1057 i := strings.IndexAny(username, "/@")
1058 j := strings.LastIndexAny(username, "/@")
1059 if i >= 0 {
1060 username = rawUsername[:i]
[73]1061 }
[183]1062 if j >= 0 {
[190]1063 if rawUsername[j] == '@' {
1064 client = rawUsername[j+1:]
1065 } else {
1066 network = rawUsername[j+1:]
1067 }
[73]1068 }
[183]1069 if i >= 0 && j >= 0 && i < j {
[190]1070 if rawUsername[i] == '@' {
1071 client = rawUsername[i+1 : j]
1072 } else {
1073 network = rawUsername[i+1 : j]
1074 }
[183]1075 }
1076
1077 return username, client, network
[112]1078}
[73]1079
[700]1080func (dc *downstreamConn) authenticate(ctx context.Context, username, password string) error {
[183]1081 username, clientName, networkName := unmarshalUsername(username)
[168]1082
[700]1083 u, err := dc.srv.db.GetUser(ctx, username)
[173]1084 if err != nil {
[438]1085 dc.logger.Printf("failed authentication for %q: user not found: %v", username, err)
[168]1086 return errAuthFailed
1087 }
1088
[322]1089 // Password auth disabled
1090 if u.Password == "" {
1091 return errAuthFailed
1092 }
1093
[173]1094 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
[168]1095 if err != nil {
[438]1096 dc.logger.Printf("failed authentication for %q: wrong password: %v", username, err)
[168]1097 return errAuthFailed
1098 }
1099
[173]1100 dc.user = dc.srv.getUser(username)
1101 if dc.user == nil {
1102 dc.logger.Printf("failed authentication for %q: user not active", username)
1103 return errAuthFailed
1104 }
[183]1105 dc.clientName = clientName
[168]1106 dc.networkName = networkName
1107 return nil
1108}
1109
[700]1110func (dc *downstreamConn) register(ctx context.Context) error {
[168]1111 if dc.registered {
1112 return fmt.Errorf("tried to register twice")
1113 }
1114
1115 password := dc.password
1116 dc.password = ""
1117 if dc.user == nil {
[700]1118 if err := dc.authenticate(ctx, dc.rawUsername, password); err != nil {
[168]1119 return err
1120 }
1121 }
1122
[183]1123 if dc.clientName == "" && dc.networkName == "" {
1124 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
[168]1125 }
1126
1127 dc.registered = true
[184]1128 dc.logger.Printf("registration complete for user %q", dc.user.Username)
[168]1129 return nil
1130}
1131
[701]1132func (dc *downstreamConn) loadNetwork(ctx context.Context) error {
[168]1133 if dc.networkName == "" {
[112]1134 return nil
1135 }
[85]1136
[168]1137 network := dc.user.getNetwork(dc.networkName)
[112]1138 if network == nil {
[168]1139 addr := dc.networkName
[112]1140 if !strings.ContainsRune(addr, ':') {
1141 addr = addr + ":6697"
1142 }
1143
1144 dc.logger.Printf("trying to connect to new network %q", addr)
[701]1145 if err := sanityCheckServer(ctx, addr); err != nil {
[112]1146 dc.logger.Printf("failed to connect to %q: %v", addr, err)
1147 return ircError{&irc.Message{
1148 Command: irc.ERR_PASSWDMISMATCH,
[168]1149 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
[112]1150 }}
1151 }
1152
[354]1153 // Some clients only allow specifying the nickname (and use the
1154 // nickname as a username too). Strip the network name from the
1155 // nickname when auto-saving networks.
1156 nick, _, _ := unmarshalUsername(dc.nick)
1157
[168]1158 dc.logger.Printf("auto-saving network %q", dc.networkName)
[112]1159 var err error
[701]1160 network, err = dc.user.createNetwork(ctx, &Network{
[542]1161 Addr: dc.networkName,
1162 Nick: nick,
1163 Enabled: true,
[120]1164 })
[112]1165 if err != nil {
1166 return err
1167 }
1168 }
1169
1170 dc.network = network
1171 return nil
1172}
1173
[701]1174func (dc *downstreamConn) welcome(ctx context.Context) error {
[168]1175 if dc.user == nil || !dc.registered {
1176 panic("tried to welcome an unregistered connection")
[37]1177 }
1178
[168]1179 // TODO: doing this might take some time. We should do it in dc.register
1180 // instead, but we'll potentially be adding a new network and this must be
1181 // done in the user goroutine.
[701]1182 if err := dc.loadNetwork(ctx); err != nil {
[168]1183 return err
[85]1184 }
1185
[694]1186 if dc.network == nil && !dc.caps["soju.im/bouncer-networks"] && dc.srv.Config().MultiUpstream {
[693]1187 dc.isMultiUpstream = true
1188 }
1189
[446]1190 isupport := []string{
[670]1191 fmt.Sprintf("CHATHISTORY=%v", chatHistoryLimit),
[478]1192 "CASEMAPPING=ascii",
[446]1193 }
1194
[532]1195 if dc.network != nil {
1196 isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
1197 }
[691]1198 if title := dc.srv.Config().Title; dc.network == nil && title != "" {
1199 isupport = append(isupport, "NETWORK="+encodeISUPPORT(title))
[662]1200 }
[693]1201 if dc.network == nil && !dc.isMultiUpstream {
[660]1202 isupport = append(isupport, "WHOX")
1203 }
1204
[463]1205 if uc := dc.upstream(); uc != nil {
1206 for k := range passthroughIsupport {
1207 v, ok := uc.isupport[k]
1208 if !ok {
1209 continue
1210 }
1211 if v != nil {
1212 isupport = append(isupport, fmt.Sprintf("%v=%v", k, *v))
1213 } else {
1214 isupport = append(isupport, k)
1215 }
1216 }
[447]1217 }
1218
[55]1219 dc.SendMessage(&irc.Message{
1220 Prefix: dc.srv.prefix(),
[13]1221 Command: irc.RPL_WELCOME,
[98]1222 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
[54]1223 })
[55]1224 dc.SendMessage(&irc.Message{
1225 Prefix: dc.srv.prefix(),
[13]1226 Command: irc.RPL_YOURHOST,
[691]1227 Params: []string{dc.nick, "Your host is " + dc.srv.Config().Hostname},
[54]1228 })
[55]1229 dc.SendMessage(&irc.Message{
1230 Prefix: dc.srv.prefix(),
[13]1231 Command: irc.RPL_MYINFO,
[691]1232 Params: []string{dc.nick, dc.srv.Config().Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
[54]1233 })
[463]1234 for _, msg := range generateIsupport(dc.srv.prefix(), dc.nick, isupport) {
1235 dc.SendMessage(msg)
1236 }
[553]1237 if uc := dc.upstream(); uc != nil {
1238 dc.SendMessage(&irc.Message{
1239 Prefix: dc.srv.prefix(),
1240 Command: irc.RPL_UMODEIS,
[672]1241 Params: []string{dc.nick, "+" + string(uc.modes)},
[553]1242 })
1243 }
[693]1244 if dc.network == nil && !dc.isMultiUpstream && dc.user.Admin {
[671]1245 dc.SendMessage(&irc.Message{
1246 Prefix: dc.srv.prefix(),
1247 Command: irc.RPL_UMODEIS,
1248 Params: []string{dc.nick, "+o"},
1249 })
1250 }
[13]1251
[691]1252 if motd := dc.user.srv.Config().MOTD; motd != "" && dc.network == nil {
[636]1253 for _, msg := range generateMOTD(dc.srv.prefix(), dc.nick, motd) {
1254 dc.SendMessage(msg)
1255 }
1256 } else {
1257 motdHint := "No MOTD"
1258 if dc.network != nil {
1259 motdHint = "Use /motd to read the message of the day"
1260 }
1261 dc.SendMessage(&irc.Message{
1262 Prefix: dc.srv.prefix(),
1263 Command: irc.ERR_NOMOTD,
1264 Params: []string{dc.nick, motdHint},
1265 })
1266 }
1267
[296]1268 dc.updateNick()
[540]1269 dc.updateRealname()
[437]1270 dc.updateSupportedCaps()
[296]1271
[535]1272 if dc.caps["soju.im/bouncer-networks-notify"] {
[551]1273 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
1274 dc.user.forEachNetwork(func(network *network) {
1275 idStr := fmt.Sprintf("%v", network.ID)
1276 attrs := getNetworkAttrs(network)
1277 dc.SendMessage(&irc.Message{
1278 Tags: irc.Tags{"batch": batchRef},
1279 Prefix: dc.srv.prefix(),
1280 Command: "BOUNCER",
1281 Params: []string{"NETWORK", idStr, attrs.String()},
1282 })
[535]1283 })
1284 })
1285 }
1286
[73]1287 dc.forEachUpstream(func(uc *upstreamConn) {
[478]1288 for _, entry := range uc.channels.innerMap {
1289 ch := entry.value.(*upstreamChannel)
[284]1290 if !ch.complete {
1291 continue
1292 }
[478]1293 record := uc.network.channels.Value(ch.Name)
1294 if record != nil && record.Detached {
[284]1295 continue
1296 }
[132]1297
[284]1298 dc.SendMessage(&irc.Message{
1299 Prefix: dc.prefix(),
1300 Command: "JOIN",
1301 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
1302 })
1303
1304 forwardChannel(dc, ch)
[30]1305 }
[143]1306 })
[50]1307
[143]1308 dc.forEachNetwork(func(net *network) {
[496]1309 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1310 return
1311 }
1312
[253]1313 // Only send history if we're the first connected client with that name
1314 // for the network
[482]1315 firstClient := true
1316 dc.user.forEachDownstream(func(c *downstreamConn) {
1317 if c != dc && c.clientName == dc.clientName && c.network == dc.network {
1318 firstClient = false
1319 }
1320 })
1321 if firstClient {
[485]1322 net.delivered.ForEachTarget(func(target string) {
[495]1323 lastDelivered := net.delivered.LoadID(target, dc.clientName)
1324 if lastDelivered == "" {
1325 return
1326 }
1327
[701]1328 dc.sendTargetBacklog(ctx, net, target, lastDelivered)
[495]1329
1330 // Fast-forward history to last message
1331 targetCM := net.casemap(target)
[666]1332 lastID, err := dc.user.msgStore.LastMsgID(&net.Network, targetCM, time.Now())
[495]1333 if err != nil {
1334 dc.logger.Printf("failed to get last message ID: %v", err)
1335 return
1336 }
1337 net.delivered.StoreID(target, dc.clientName, lastID)
[485]1338 })
[227]1339 }
[253]1340 })
[57]1341
[253]1342 return nil
1343}
[144]1344
[665]1345// messageSupportsBacklog checks whether the provided message can be sent as
[428]1346// part of an history batch.
[665]1347func (dc *downstreamConn) messageSupportsBacklog(msg *irc.Message) bool {
[428]1348 // Don't replay all messages, because that would mess up client
1349 // state. For instance we just sent the list of users, sending
1350 // PART messages for one of these users would be incorrect.
1351 switch msg.Command {
1352 case "PRIVMSG", "NOTICE":
1353 return true
1354 }
1355 return false
1356}
1357
[701]1358func (dc *downstreamConn) sendTargetBacklog(ctx context.Context, net *network, target, msgID string) {
[423]1359 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
[319]1360 return
1361 }
[485]1362
[499]1363 ch := net.channels.Value(target)
1364
[701]1365 ctx, cancel := context.WithTimeout(ctx, backlogTimeout)
[667]1366 defer cancel()
1367
[484]1368 targetCM := net.casemap(target)
[670]1369 history, err := dc.user.msgStore.LoadLatestID(ctx, &net.Network, targetCM, msgID, backlogLimit)
[452]1370 if err != nil {
[495]1371 dc.logger.Printf("failed to send backlog for %q: %v", target, err)
[452]1372 return
1373 }
[253]1374
[551]1375 dc.SendBatch("chathistory", []string{dc.marshalEntity(net, target)}, nil, func(batchRef irc.TagValue) {
1376 for _, msg := range history {
1377 if ch != nil && ch.Detached {
1378 if net.detachedMessageNeedsRelay(ch, msg) {
1379 dc.relayDetachedMessage(net, msg)
1380 }
1381 } else {
[651]1382 msg.Tags["batch"] = batchRef
[551]1383 dc.SendMessage(dc.marshalMessage(msg, net))
[499]1384 }
[256]1385 }
[551]1386 })
[13]1387}
1388
[499]1389func (dc *downstreamConn) relayDetachedMessage(net *network, msg *irc.Message) {
1390 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
1391 return
1392 }
1393
1394 sender := msg.Prefix.Name
1395 target, text := msg.Params[0], msg.Params[1]
1396 if net.isHighlight(msg) {
1397 sendServiceNOTICE(dc, fmt.Sprintf("highlight in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1398 } else {
1399 sendServiceNOTICE(dc, fmt.Sprintf("message in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1400 }
1401}
1402
[103]1403func (dc *downstreamConn) runUntilRegistered() error {
[704]1404 ctx, cancel := context.WithTimeout(context.TODO(), downstreamRegisterTimeout)
1405 defer cancel()
1406
1407 // Close the connection with an error if the deadline is exceeded
1408 go func() {
1409 <-ctx.Done()
1410 if err := ctx.Err(); err == context.DeadlineExceeded {
1411 dc.SendMessage(&irc.Message{
1412 Prefix: dc.srv.prefix(),
1413 Command: "ERROR",
1414 Params: []string{"Connection registration timed out"},
1415 })
1416 dc.Close()
1417 }
1418 }()
1419
[103]1420 for !dc.registered {
[212]1421 msg, err := dc.ReadMessage()
[106]1422 if err != nil {
[655]1423 return fmt.Errorf("failed to read IRC command: %w", err)
[103]1424 }
1425
[704]1426 err = dc.handleMessage(ctx, msg)
[103]1427 if ircErr, ok := err.(ircError); ok {
1428 ircErr.Message.Prefix = dc.srv.prefix()
1429 dc.SendMessage(ircErr.Message)
1430 } else if err != nil {
1431 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
1432 }
1433 }
1434
1435 return nil
1436}
1437
[702]1438func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.Message) error {
[13]1439 switch msg.Command {
[111]1440 case "CAP":
1441 var subCmd string
1442 if err := parseMessageParams(msg, &subCmd); err != nil {
1443 return err
1444 }
1445 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
1446 return err
1447 }
[107]1448 case "PING":
[412]1449 var source, destination string
1450 if err := parseMessageParams(msg, &source); err != nil {
1451 return err
1452 }
1453 if len(msg.Params) > 1 {
1454 destination = msg.Params[1]
1455 }
[691]1456 hostname := dc.srv.Config().Hostname
1457 if destination != "" && destination != hostname {
[412]1458 return ircError{&irc.Message{
1459 Command: irc.ERR_NOSUCHSERVER,
[413]1460 Params: []string{dc.nick, destination, "No such server"},
[412]1461 }}
1462 }
[107]1463 dc.SendMessage(&irc.Message{
1464 Prefix: dc.srv.prefix(),
1465 Command: "PONG",
[691]1466 Params: []string{hostname, source},
[107]1467 })
1468 return nil
[428]1469 case "PONG":
1470 if len(msg.Params) == 0 {
1471 return newNeedMoreParamsError(msg.Command)
1472 }
1473 token := msg.Params[len(msg.Params)-1]
1474 dc.handlePong(token)
[42]1475 case "USER":
[13]1476 return ircError{&irc.Message{
1477 Command: irc.ERR_ALREADYREGISTERED,
[55]1478 Params: []string{dc.nick, "You may not reregister"},
[13]1479 }}
[42]1480 case "NICK":
[429]1481 var rawNick string
1482 if err := parseMessageParams(msg, &rawNick); err != nil {
[90]1483 return err
1484 }
1485
[429]1486 nick := rawNick
[297]1487 var upstream *upstreamConn
1488 if dc.upstream() == nil {
1489 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
1490 if err == nil { // NICK nick/network: NICK only on a specific upstream
1491 upstream = uc
1492 nick = unmarshaledNick
1493 }
1494 }
1495
[404]1496 if strings.ContainsAny(nick, illegalNickChars) {
1497 return ircError{&irc.Message{
1498 Command: irc.ERR_ERRONEUSNICKNAME,
[430]1499 Params: []string{dc.nick, rawNick, "contains illegal characters"},
[404]1500 }}
1501 }
[478]1502 if casemapASCII(nick) == serviceNickCM {
[429]1503 return ircError{&irc.Message{
1504 Command: irc.ERR_NICKNAMEINUSE,
1505 Params: []string{dc.nick, rawNick, "Nickname reserved for bouncer service"},
1506 }}
1507 }
[404]1508
[90]1509 var err error
1510 dc.forEachNetwork(func(n *network) {
[297]1511 if err != nil || (upstream != nil && upstream.network != n) {
[90]1512 return
1513 }
1514 n.Nick = nick
[675]1515 err = dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network)
[90]1516 })
1517 if err != nil {
1518 return err
1519 }
1520
[73]1521 dc.forEachUpstream(func(uc *upstreamConn) {
[297]1522 if upstream != nil && upstream != uc {
1523 return
1524 }
[301]1525 uc.SendMessageLabeled(dc.id, &irc.Message{
[297]1526 Command: "NICK",
1527 Params: []string{nick},
1528 })
[42]1529 })
[296]1530
[512]1531 if dc.upstream() == nil && upstream == nil && dc.nick != nick {
[296]1532 dc.SendMessage(&irc.Message{
1533 Prefix: dc.prefix(),
1534 Command: "NICK",
1535 Params: []string{nick},
1536 })
1537 dc.nick = nick
[478]1538 dc.nickCM = casemapASCII(dc.nick)
[296]1539 }
[540]1540 case "SETNAME":
1541 var realname string
1542 if err := parseMessageParams(msg, &realname); err != nil {
1543 return err
1544 }
1545
[568]1546 // If the client just resets to the default, just wipe the per-network
1547 // preference
1548 storeRealname := realname
1549 if realname == dc.user.Realname {
1550 storeRealname = ""
1551 }
1552
[540]1553 var storeErr error
1554 var needUpdate []Network
1555 dc.forEachNetwork(func(n *network) {
1556 // We only need to call updateNetwork for upstreams that don't
1557 // support setname
1558 if uc := n.conn; uc != nil && uc.caps["setname"] {
1559 uc.SendMessageLabeled(dc.id, &irc.Message{
1560 Command: "SETNAME",
1561 Params: []string{realname},
1562 })
1563
[568]1564 n.Realname = storeRealname
[675]1565 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
[540]1566 dc.logger.Printf("failed to store network realname: %v", err)
1567 storeErr = err
1568 }
1569 return
1570 }
1571
1572 record := n.Network // copy network record because we'll mutate it
[568]1573 record.Realname = storeRealname
[540]1574 needUpdate = append(needUpdate, record)
1575 })
1576
1577 // Walk the network list as a second step, because updateNetwork
1578 // mutates the original list
1579 for _, record := range needUpdate {
[676]1580 if _, err := dc.user.updateNetwork(ctx, &record); err != nil {
[540]1581 dc.logger.Printf("failed to update network realname: %v", err)
1582 storeErr = err
1583 }
1584 }
1585 if storeErr != nil {
1586 return ircError{&irc.Message{
1587 Command: "FAIL",
1588 Params: []string{"SETNAME", "CANNOT_CHANGE_REALNAME", "Failed to update realname"},
1589 }}
1590 }
1591
[651]1592 if dc.upstream() == nil {
[540]1593 dc.SendMessage(&irc.Message{
1594 Prefix: dc.prefix(),
1595 Command: "SETNAME",
1596 Params: []string{realname},
1597 })
1598 }
[146]1599 case "JOIN":
1600 var namesStr string
1601 if err := parseMessageParams(msg, &namesStr); err != nil {
[48]1602 return err
1603 }
1604
[146]1605 var keys []string
1606 if len(msg.Params) > 1 {
1607 keys = strings.Split(msg.Params[1], ",")
1608 }
1609
1610 for i, name := range strings.Split(namesStr, ",") {
[145]1611 uc, upstreamName, err := dc.unmarshalEntity(name)
1612 if err != nil {
[158]1613 return err
[145]1614 }
[48]1615
[146]1616 var key string
1617 if len(keys) > i {
1618 key = keys[i]
1619 }
1620
[545]1621 if !uc.isChannel(upstreamName) {
1622 dc.SendMessage(&irc.Message{
1623 Prefix: dc.srv.prefix(),
1624 Command: irc.ERR_NOSUCHCHANNEL,
1625 Params: []string{name, "Not a channel name"},
1626 })
1627 continue
1628 }
1629
[146]1630 params := []string{upstreamName}
1631 if key != "" {
1632 params = append(params, key)
1633 }
[301]1634 uc.SendMessageLabeled(dc.id, &irc.Message{
[146]1635 Command: "JOIN",
1636 Params: params,
[145]1637 })
[89]1638
[478]1639 ch := uc.network.channels.Value(upstreamName)
1640 if ch != nil {
[285]1641 // Don't clear the channel key if there's one set
1642 // TODO: add a way to unset the channel key
[435]1643 if key != "" {
1644 ch.Key = key
1645 }
1646 uc.network.attach(ch)
1647 } else {
1648 ch = &Channel{
1649 Name: upstreamName,
1650 Key: key,
1651 }
[478]1652 uc.network.channels.SetValue(upstreamName, ch)
[285]1653 }
[675]1654 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
[222]1655 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
[89]1656 }
1657 }
[146]1658 case "PART":
1659 var namesStr string
1660 if err := parseMessageParams(msg, &namesStr); err != nil {
1661 return err
1662 }
1663
1664 var reason string
1665 if len(msg.Params) > 1 {
1666 reason = msg.Params[1]
1667 }
1668
1669 for _, name := range strings.Split(namesStr, ",") {
1670 uc, upstreamName, err := dc.unmarshalEntity(name)
1671 if err != nil {
[158]1672 return err
[146]1673 }
1674
[284]1675 if strings.EqualFold(reason, "detach") {
[478]1676 ch := uc.network.channels.Value(upstreamName)
1677 if ch != nil {
[435]1678 uc.network.detach(ch)
1679 } else {
1680 ch = &Channel{
1681 Name: name,
1682 Detached: true,
1683 }
[478]1684 uc.network.channels.SetValue(upstreamName, ch)
[284]1685 }
[675]1686 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
[435]1687 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1688 }
[284]1689 } else {
1690 params := []string{upstreamName}
1691 if reason != "" {
1692 params = append(params, reason)
1693 }
[301]1694 uc.SendMessageLabeled(dc.id, &irc.Message{
[284]1695 Command: "PART",
1696 Params: params,
1697 })
[146]1698
[676]1699 if err := uc.network.deleteChannel(ctx, upstreamName); err != nil {
[284]1700 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1701 }
[146]1702 }
1703 }
[159]1704 case "KICK":
1705 var channelStr, userStr string
1706 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1707 return err
1708 }
1709
1710 channels := strings.Split(channelStr, ",")
1711 users := strings.Split(userStr, ",")
1712
1713 var reason string
1714 if len(msg.Params) > 2 {
1715 reason = msg.Params[2]
1716 }
1717
1718 if len(channels) != 1 && len(channels) != len(users) {
1719 return ircError{&irc.Message{
1720 Command: irc.ERR_BADCHANMASK,
1721 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1722 }}
1723 }
1724
1725 for i, user := range users {
1726 var channel string
1727 if len(channels) == 1 {
1728 channel = channels[0]
1729 } else {
1730 channel = channels[i]
1731 }
1732
1733 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1734 if err != nil {
1735 return err
1736 }
1737
1738 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1739 if err != nil {
1740 return err
1741 }
1742
1743 if ucChannel != ucUser {
1744 return ircError{&irc.Message{
1745 Command: irc.ERR_USERNOTINCHANNEL,
[400]1746 Params: []string{dc.nick, user, channel, "They are on another network"},
[159]1747 }}
1748 }
1749 uc := ucChannel
1750
1751 params := []string{upstreamChannel, upstreamUser}
1752 if reason != "" {
1753 params = append(params, reason)
1754 }
[301]1755 uc.SendMessageLabeled(dc.id, &irc.Message{
[159]1756 Command: "KICK",
1757 Params: params,
1758 })
1759 }
[69]1760 case "MODE":
[46]1761 var name string
1762 if err := parseMessageParams(msg, &name); err != nil {
1763 return err
1764 }
1765
1766 var modeStr string
1767 if len(msg.Params) > 1 {
1768 modeStr = msg.Params[1]
1769 }
1770
[478]1771 if casemapASCII(name) == dc.nickCM {
[46]1772 if modeStr != "" {
[554]1773 if uc := dc.upstream(); uc != nil {
[301]1774 uc.SendMessageLabeled(dc.id, &irc.Message{
[69]1775 Command: "MODE",
1776 Params: []string{uc.nick, modeStr},
1777 })
[554]1778 } else {
1779 dc.SendMessage(&irc.Message{
1780 Prefix: dc.srv.prefix(),
1781 Command: irc.ERR_UMODEUNKNOWNFLAG,
1782 Params: []string{dc.nick, "Cannot change user mode in multi-upstream mode"},
1783 })
1784 }
[46]1785 } else {
[553]1786 var userMode string
1787 if uc := dc.upstream(); uc != nil {
1788 userMode = string(uc.modes)
1789 }
1790
[55]1791 dc.SendMessage(&irc.Message{
1792 Prefix: dc.srv.prefix(),
[46]1793 Command: irc.RPL_UMODEIS,
[672]1794 Params: []string{dc.nick, "+" + userMode},
[54]1795 })
[46]1796 }
[139]1797 return nil
[46]1798 }
[139]1799
1800 uc, upstreamName, err := dc.unmarshalEntity(name)
1801 if err != nil {
1802 return err
1803 }
1804
1805 if !uc.isChannel(upstreamName) {
1806 return ircError{&irc.Message{
1807 Command: irc.ERR_USERSDONTMATCH,
1808 Params: []string{dc.nick, "Cannot change mode for other users"},
1809 }}
1810 }
1811
1812 if modeStr != "" {
1813 params := []string{upstreamName, modeStr}
1814 params = append(params, msg.Params[2:]...)
[301]1815 uc.SendMessageLabeled(dc.id, &irc.Message{
[139]1816 Command: "MODE",
1817 Params: params,
1818 })
1819 } else {
[478]1820 ch := uc.channels.Value(upstreamName)
1821 if ch == nil {
[139]1822 return ircError{&irc.Message{
1823 Command: irc.ERR_NOSUCHCHANNEL,
1824 Params: []string{dc.nick, name, "No such channel"},
1825 }}
1826 }
1827
1828 if ch.modes == nil {
1829 // we haven't received the initial RPL_CHANNELMODEIS yet
1830 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1831 return nil
1832 }
1833
1834 modeStr, modeParams := ch.modes.Format()
1835 params := []string{dc.nick, name, modeStr}
1836 params = append(params, modeParams...)
1837
1838 dc.SendMessage(&irc.Message{
1839 Prefix: dc.srv.prefix(),
1840 Command: irc.RPL_CHANNELMODEIS,
1841 Params: params,
1842 })
[162]1843 if ch.creationTime != "" {
1844 dc.SendMessage(&irc.Message{
1845 Prefix: dc.srv.prefix(),
1846 Command: rpl_creationtime,
1847 Params: []string{dc.nick, name, ch.creationTime},
1848 })
1849 }
[139]1850 }
[160]1851 case "TOPIC":
1852 var channel string
1853 if err := parseMessageParams(msg, &channel); err != nil {
1854 return err
1855 }
1856
[478]1857 uc, upstreamName, err := dc.unmarshalEntity(channel)
[160]1858 if err != nil {
1859 return err
1860 }
1861
1862 if len(msg.Params) > 1 { // setting topic
1863 topic := msg.Params[1]
[301]1864 uc.SendMessageLabeled(dc.id, &irc.Message{
[160]1865 Command: "TOPIC",
[478]1866 Params: []string{upstreamName, topic},
[160]1867 })
1868 } else { // getting topic
[478]1869 ch := uc.channels.Value(upstreamName)
1870 if ch == nil {
[160]1871 return ircError{&irc.Message{
1872 Command: irc.ERR_NOSUCHCHANNEL,
[478]1873 Params: []string{dc.nick, upstreamName, "No such channel"},
[160]1874 }}
1875 }
1876 sendTopic(dc, ch)
1877 }
[177]1878 case "LIST":
[681]1879 network := dc.network
1880 if network == nil && len(msg.Params) > 0 {
1881 var err error
1882 network, msg.Params[0], err = dc.unmarshalEntityNetwork(msg.Params[0])
1883 if err != nil {
1884 return err
[177]1885 }
1886 }
[681]1887 if network == nil {
1888 dc.SendMessage(&irc.Message{
1889 Prefix: dc.srv.prefix(),
1890 Command: irc.RPL_LISTEND,
1891 Params: []string{dc.nick, "LIST without a network suffix is not supported in multi-upstream mode"},
1892 })
1893 return nil
1894 }
[177]1895
[681]1896 uc := network.conn
1897 if uc == nil {
1898 dc.SendMessage(&irc.Message{
1899 Prefix: dc.srv.prefix(),
1900 Command: irc.RPL_LISTEND,
1901 Params: []string{dc.nick, "Disconnected from upstream server"},
1902 })
1903 return nil
1904 }
1905
[682]1906 uc.enqueueCommand(dc, msg)
[140]1907 case "NAMES":
1908 if len(msg.Params) == 0 {
1909 dc.SendMessage(&irc.Message{
1910 Prefix: dc.srv.prefix(),
1911 Command: irc.RPL_ENDOFNAMES,
1912 Params: []string{dc.nick, "*", "End of /NAMES list"},
1913 })
1914 return nil
1915 }
1916
1917 channels := strings.Split(msg.Params[0], ",")
1918 for _, channel := range channels {
[478]1919 uc, upstreamName, err := dc.unmarshalEntity(channel)
[140]1920 if err != nil {
1921 return err
1922 }
1923
[478]1924 ch := uc.channels.Value(upstreamName)
1925 if ch != nil {
[140]1926 sendNames(dc, ch)
1927 } else {
1928 // NAMES on a channel we have not joined, ask upstream
[176]1929 uc.SendMessageLabeled(dc.id, &irc.Message{
[140]1930 Command: "NAMES",
[478]1931 Params: []string{upstreamName},
[140]1932 })
1933 }
1934 }
[660]1935 // For WHOX docs, see:
1936 // - http://faerion.sourceforge.net/doc/irc/whox.var
1937 // - https://github.com/quakenet/snircd/blob/master/doc/readme.who
1938 // Note, many features aren't widely implemented, such as flags and mask2
[127]1939 case "WHO":
1940 if len(msg.Params) == 0 {
1941 // TODO: support WHO without parameters
1942 dc.SendMessage(&irc.Message{
1943 Prefix: dc.srv.prefix(),
1944 Command: irc.RPL_ENDOFWHO,
[140]1945 Params: []string{dc.nick, "*", "End of /WHO list"},
[127]1946 })
1947 return nil
1948 }
1949
[660]1950 // Clients will use the first mask to match RPL_ENDOFWHO
1951 endOfWhoToken := msg.Params[0]
[127]1952
[660]1953 // TODO: add support for WHOX mask2
1954 mask := msg.Params[0]
1955 var options string
1956 if len(msg.Params) > 1 {
1957 options = msg.Params[1]
1958 }
1959
1960 optionsParts := strings.SplitN(options, "%", 2)
1961 // TODO: add support for WHOX flags in optionsParts[0]
1962 var fields, whoxToken string
1963 if len(optionsParts) == 2 {
1964 optionsParts := strings.SplitN(optionsParts[1], ",", 2)
1965 fields = strings.ToLower(optionsParts[0])
1966 if len(optionsParts) == 2 && strings.Contains(fields, "t") {
1967 whoxToken = optionsParts[1]
1968 }
1969 }
1970
1971 // TODO: support mixed bouncer/upstream WHO queries
1972 maskCM := casemapASCII(mask)
1973 if dc.network == nil && maskCM == dc.nickCM {
[142]1974 // TODO: support AWAY (H/G) in self WHO reply
[658]1975 flags := "H"
1976 if dc.user.Admin {
[659]1977 flags += "*"
[658]1978 }
[660]1979 info := whoxInfo{
1980 Token: whoxToken,
1981 Username: dc.user.Username,
1982 Hostname: dc.hostname,
[691]1983 Server: dc.srv.Config().Hostname,
[660]1984 Nickname: dc.nick,
1985 Flags: flags,
[661]1986 Account: dc.user.Username,
[660]1987 Realname: dc.realname,
1988 }
1989 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
[142]1990 dc.SendMessage(&irc.Message{
1991 Prefix: dc.srv.prefix(),
1992 Command: irc.RPL_ENDOFWHO,
[660]1993 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
[142]1994 })
1995 return nil
1996 }
[660]1997 if maskCM == serviceNickCM {
1998 info := whoxInfo{
1999 Token: whoxToken,
2000 Username: servicePrefix.User,
2001 Hostname: servicePrefix.Host,
[691]2002 Server: dc.srv.Config().Hostname,
[660]2003 Nickname: serviceNick,
2004 Flags: "H*",
[661]2005 Account: serviceNick,
[660]2006 Realname: serviceRealname,
2007 }
2008 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
[343]2009 dc.SendMessage(&irc.Message{
2010 Prefix: dc.srv.prefix(),
2011 Command: irc.RPL_ENDOFWHO,
[660]2012 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
[343]2013 })
2014 return nil
2015 }
[142]2016
[660]2017 // TODO: properly support WHO masks
2018 uc, upstreamMask, err := dc.unmarshalEntity(mask)
[127]2019 if err != nil {
2020 return err
2021 }
2022
[660]2023 params := []string{upstreamMask}
2024 if options != "" {
2025 params = append(params, options)
[127]2026 }
2027
[682]2028 uc.enqueueCommand(dc, &irc.Message{
[127]2029 Command: "WHO",
2030 Params: params,
2031 })
[128]2032 case "WHOIS":
2033 if len(msg.Params) == 0 {
2034 return ircError{&irc.Message{
2035 Command: irc.ERR_NONICKNAMEGIVEN,
2036 Params: []string{dc.nick, "No nickname given"},
2037 }}
2038 }
2039
2040 var target, mask string
2041 if len(msg.Params) == 1 {
2042 target = ""
2043 mask = msg.Params[0]
2044 } else {
2045 target = msg.Params[0]
2046 mask = msg.Params[1]
2047 }
2048 // TODO: support multiple WHOIS users
2049 if i := strings.IndexByte(mask, ','); i >= 0 {
2050 mask = mask[:i]
2051 }
2052
[520]2053 if dc.network == nil && casemapASCII(mask) == dc.nickCM {
[142]2054 dc.SendMessage(&irc.Message{
2055 Prefix: dc.srv.prefix(),
2056 Command: irc.RPL_WHOISUSER,
[184]2057 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
[142]2058 })
2059 dc.SendMessage(&irc.Message{
2060 Prefix: dc.srv.prefix(),
2061 Command: irc.RPL_WHOISSERVER,
[691]2062 Params: []string{dc.nick, dc.nick, dc.srv.Config().Hostname, "soju"},
[142]2063 })
[658]2064 if dc.user.Admin {
2065 dc.SendMessage(&irc.Message{
2066 Prefix: dc.srv.prefix(),
2067 Command: irc.RPL_WHOISOPERATOR,
2068 Params: []string{dc.nick, dc.nick, "is a bouncer administrator"},
2069 })
2070 }
[142]2071 dc.SendMessage(&irc.Message{
2072 Prefix: dc.srv.prefix(),
[661]2073 Command: rpl_whoisaccount,
2074 Params: []string{dc.nick, dc.nick, dc.user.Username, "is logged in as"},
2075 })
2076 dc.SendMessage(&irc.Message{
2077 Prefix: dc.srv.prefix(),
[142]2078 Command: irc.RPL_ENDOFWHOIS,
2079 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
2080 })
2081 return nil
2082 }
[609]2083 if casemapASCII(mask) == serviceNickCM {
2084 dc.SendMessage(&irc.Message{
2085 Prefix: dc.srv.prefix(),
2086 Command: irc.RPL_WHOISUSER,
2087 Params: []string{dc.nick, serviceNick, servicePrefix.User, servicePrefix.Host, "*", serviceRealname},
2088 })
2089 dc.SendMessage(&irc.Message{
2090 Prefix: dc.srv.prefix(),
2091 Command: irc.RPL_WHOISSERVER,
[691]2092 Params: []string{dc.nick, serviceNick, dc.srv.Config().Hostname, "soju"},
[609]2093 })
2094 dc.SendMessage(&irc.Message{
2095 Prefix: dc.srv.prefix(),
[657]2096 Command: irc.RPL_WHOISOPERATOR,
2097 Params: []string{dc.nick, serviceNick, "is the bouncer service"},
2098 })
2099 dc.SendMessage(&irc.Message{
2100 Prefix: dc.srv.prefix(),
[661]2101 Command: rpl_whoisaccount,
2102 Params: []string{dc.nick, serviceNick, serviceNick, "is logged in as"},
2103 })
2104 dc.SendMessage(&irc.Message{
2105 Prefix: dc.srv.prefix(),
[609]2106 Command: irc.RPL_ENDOFWHOIS,
2107 Params: []string{dc.nick, serviceNick, "End of /WHOIS list"},
2108 })
2109 return nil
2110 }
[142]2111
[128]2112 // TODO: support WHOIS masks
2113 uc, upstreamNick, err := dc.unmarshalEntity(mask)
2114 if err != nil {
2115 return err
2116 }
2117
2118 var params []string
2119 if target != "" {
[299]2120 if target == mask { // WHOIS nick nick
2121 params = []string{upstreamNick, upstreamNick}
2122 } else {
2123 params = []string{target, upstreamNick}
2124 }
[128]2125 } else {
2126 params = []string{upstreamNick}
2127 }
2128
[176]2129 uc.SendMessageLabeled(dc.id, &irc.Message{
[128]2130 Command: "WHOIS",
2131 Params: params,
2132 })
[562]2133 case "PRIVMSG", "NOTICE":
[58]2134 var targetsStr, text string
2135 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
2136 return err
2137 }
[303]2138 tags := copyClientTags(msg.Tags)
[58]2139
2140 for _, name := range strings.Split(targetsStr, ",") {
[691]2141 if name == "$"+dc.srv.Config().Hostname || (name == "$*" && dc.network == nil) {
[563]2142 // "$" means a server mask follows. If it's the bouncer's
2143 // hostname, broadcast the message to all bouncer users.
2144 if !dc.user.Admin {
2145 return ircError{&irc.Message{
2146 Prefix: dc.srv.prefix(),
2147 Command: irc.ERR_BADMASK,
2148 Params: []string{dc.nick, name, "Permission denied to broadcast message to all bouncer users"},
2149 }}
2150 }
2151
2152 dc.logger.Printf("broadcasting bouncer-wide %v: %v", msg.Command, text)
2153
2154 broadcastTags := tags.Copy()
2155 broadcastTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2156 broadcastMsg := &irc.Message{
2157 Tags: broadcastTags,
2158 Prefix: servicePrefix,
2159 Command: msg.Command,
2160 Params: []string{name, text},
2161 }
2162 dc.srv.forEachUser(func(u *user) {
2163 u.events <- eventBroadcast{broadcastMsg}
2164 })
2165 continue
2166 }
2167
[529]2168 if dc.network == nil && casemapASCII(name) == dc.nickCM {
[618]2169 dc.SendMessage(&irc.Message{
2170 Tags: msg.Tags.Copy(),
2171 Prefix: dc.prefix(),
2172 Command: msg.Command,
2173 Params: []string{name, text},
2174 })
[529]2175 continue
2176 }
2177
[562]2178 if msg.Command == "PRIVMSG" && casemapASCII(name) == serviceNickCM {
[431]2179 if dc.caps["echo-message"] {
2180 echoTags := tags.Copy()
2181 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2182 dc.SendMessage(&irc.Message{
2183 Tags: echoTags,
2184 Prefix: dc.prefix(),
[562]2185 Command: msg.Command,
[431]2186 Params: []string{name, text},
2187 })
2188 }
[677]2189 handleServicePRIVMSG(ctx, dc, text)
[117]2190 continue
2191 }
2192
[127]2193 uc, upstreamName, err := dc.unmarshalEntity(name)
[58]2194 if err != nil {
2195 return err
2196 }
2197
[562]2198 if msg.Command == "PRIVMSG" && uc.network.casemap(upstreamName) == "nickserv" {
[675]2199 dc.handleNickServPRIVMSG(ctx, uc, text)
[95]2200 }
2201
[268]2202 unmarshaledText := text
2203 if uc.isChannel(upstreamName) {
2204 unmarshaledText = dc.unmarshalText(uc, text)
2205 }
[301]2206 uc.SendMessageLabeled(dc.id, &irc.Message{
[303]2207 Tags: tags,
[562]2208 Command: msg.Command,
[268]2209 Params: []string{upstreamName, unmarshaledText},
[60]2210 })
[105]2211
[303]2212 echoTags := tags.Copy()
2213 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
[559]2214 if uc.account != "" {
2215 echoTags["account"] = irc.TagValue(uc.account)
2216 }
[113]2217 echoMsg := &irc.Message{
[690]2218 Tags: echoTags,
2219 Prefix: &irc.Prefix{Name: uc.nick},
[562]2220 Command: msg.Command,
[113]2221 Params: []string{upstreamName, text},
2222 }
[239]2223 uc.produce(upstreamName, echoMsg, dc)
[435]2224
2225 uc.updateChannelAutoDetach(upstreamName)
[58]2226 }
[303]2227 case "TAGMSG":
2228 var targetsStr string
2229 if err := parseMessageParams(msg, &targetsStr); err != nil {
2230 return err
2231 }
2232 tags := copyClientTags(msg.Tags)
2233
2234 for _, name := range strings.Split(targetsStr, ",") {
[617]2235 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2236 dc.SendMessage(&irc.Message{
2237 Tags: msg.Tags.Copy(),
2238 Prefix: dc.prefix(),
2239 Command: "TAGMSG",
2240 Params: []string{name},
2241 })
2242 continue
2243 }
2244
[616]2245 if casemapASCII(name) == serviceNickCM {
2246 continue
2247 }
2248
[303]2249 uc, upstreamName, err := dc.unmarshalEntity(name)
2250 if err != nil {
2251 return err
2252 }
[427]2253 if _, ok := uc.caps["message-tags"]; !ok {
2254 continue
2255 }
[303]2256
2257 uc.SendMessageLabeled(dc.id, &irc.Message{
2258 Tags: tags,
2259 Command: "TAGMSG",
2260 Params: []string{upstreamName},
2261 })
[435]2262
2263 uc.updateChannelAutoDetach(upstreamName)
[303]2264 }
[163]2265 case "INVITE":
2266 var user, channel string
2267 if err := parseMessageParams(msg, &user, &channel); err != nil {
2268 return err
2269 }
2270
2271 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
2272 if err != nil {
2273 return err
2274 }
2275
2276 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
2277 if err != nil {
2278 return err
2279 }
2280
2281 if ucChannel != ucUser {
2282 return ircError{&irc.Message{
2283 Command: irc.ERR_USERNOTINCHANNEL,
[401]2284 Params: []string{dc.nick, user, channel, "They are on another network"},
[163]2285 }}
2286 }
2287 uc := ucChannel
2288
[176]2289 uc.SendMessageLabeled(dc.id, &irc.Message{
[163]2290 Command: "INVITE",
2291 Params: []string{upstreamUser, upstreamChannel},
2292 })
[684]2293 case "MONITOR":
2294 // MONITOR is unsupported in multi-upstream mode
2295 uc := dc.upstream()
2296 if uc == nil {
2297 return newUnknownCommandError(msg.Command)
2298 }
2299
2300 var subcommand string
2301 if err := parseMessageParams(msg, &subcommand); err != nil {
2302 return err
2303 }
2304
2305 switch strings.ToUpper(subcommand) {
2306 case "+", "-":
2307 var targets string
2308 if err := parseMessageParams(msg, nil, &targets); err != nil {
2309 return err
2310 }
2311 for _, target := range strings.Split(targets, ",") {
2312 if subcommand == "+" {
2313 // Hard limit, just to avoid having downstreams fill our map
2314 if len(dc.monitored.innerMap) >= 1000 {
2315 dc.SendMessage(&irc.Message{
2316 Prefix: dc.srv.prefix(),
2317 Command: irc.ERR_MONLISTFULL,
2318 Params: []string{dc.nick, "1000", target, "Bouncer monitor list is full"},
2319 })
2320 continue
2321 }
2322
2323 dc.monitored.SetValue(target, nil)
2324
2325 if uc.monitored.Has(target) {
2326 cmd := irc.RPL_MONOFFLINE
2327 if online := uc.monitored.Value(target); online {
2328 cmd = irc.RPL_MONONLINE
2329 }
2330
2331 dc.SendMessage(&irc.Message{
2332 Prefix: dc.srv.prefix(),
2333 Command: cmd,
2334 Params: []string{dc.nick, target},
2335 })
2336 }
2337 } else {
2338 dc.monitored.Delete(target)
2339 }
2340 }
2341 uc.updateMonitor()
2342 case "C": // clear
2343 dc.monitored = newCasemapMap(0)
2344 uc.updateMonitor()
2345 case "L": // list
2346 // TODO: be less lazy and pack the list
2347 for _, entry := range dc.monitored.innerMap {
2348 dc.SendMessage(&irc.Message{
2349 Prefix: dc.srv.prefix(),
2350 Command: irc.RPL_MONLIST,
2351 Params: []string{dc.nick, entry.originalKey},
2352 })
2353 }
2354 dc.SendMessage(&irc.Message{
2355 Prefix: dc.srv.prefix(),
2356 Command: irc.RPL_ENDOFMONLIST,
2357 Params: []string{dc.nick, "End of MONITOR list"},
2358 })
2359 case "S": // status
2360 // TODO: be less lazy and pack the lists
2361 for _, entry := range dc.monitored.innerMap {
2362 target := entry.originalKey
2363
2364 cmd := irc.RPL_MONOFFLINE
2365 if online := uc.monitored.Value(target); online {
2366 cmd = irc.RPL_MONONLINE
2367 }
2368
2369 dc.SendMessage(&irc.Message{
2370 Prefix: dc.srv.prefix(),
2371 Command: cmd,
2372 Params: []string{dc.nick, target},
2373 })
2374 }
2375 }
[319]2376 case "CHATHISTORY":
2377 var subcommand string
2378 if err := parseMessageParams(msg, &subcommand); err != nil {
2379 return err
2380 }
[516]2381 var target, limitStr string
2382 var boundsStr [2]string
2383 switch subcommand {
2384 case "AFTER", "BEFORE":
2385 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &limitStr); err != nil {
2386 return err
2387 }
2388 case "BETWEEN":
2389 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2390 return err
2391 }
[549]2392 case "TARGETS":
[688]2393 if dc.network == nil {
2394 // Either an unbound bouncer network, in which case we should return no targets,
2395 // or a multi-upstream downstream, but we don't support CHATHISTORY TARGETS for those yet.
2396 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {})
2397 return nil
2398 }
[549]2399 if err := parseMessageParams(msg, nil, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2400 return err
2401 }
[516]2402 default:
2403 // TODO: support LATEST, AROUND
[319]2404 return ircError{&irc.Message{
2405 Command: "FAIL",
[516]2406 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, "Unknown command"},
[319]2407 }}
2408 }
2409
[586]2410 // We don't save history for our service
2411 if casemapASCII(target) == serviceNickCM {
2412 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {})
2413 return nil
2414 }
2415
[441]2416 store, ok := dc.user.msgStore.(chatHistoryMessageStore)
2417 if !ok {
[319]2418 return ircError{&irc.Message{
2419 Command: irc.ERR_UNKNOWNCOMMAND,
[456]2420 Params: []string{dc.nick, "CHATHISTORY", "Unknown command"},
[319]2421 }}
2422 }
2423
[585]2424 network, entity, err := dc.unmarshalEntityNetwork(target)
[319]2425 if err != nil {
2426 return err
2427 }
[585]2428 entity = network.casemap(entity)
[319]2429
2430 // TODO: support msgid criteria
[516]2431 var bounds [2]time.Time
2432 bounds[0] = parseChatHistoryBound(boundsStr[0])
2433 if bounds[0].IsZero() {
[319]2434 return ircError{&irc.Message{
2435 Command: "FAIL",
[516]2436 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[0], "Invalid first bound"},
[319]2437 }}
2438 }
2439
[516]2440 if boundsStr[1] != "" {
2441 bounds[1] = parseChatHistoryBound(boundsStr[1])
2442 if bounds[1].IsZero() {
2443 return ircError{&irc.Message{
2444 Command: "FAIL",
2445 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[1], "Invalid second bound"},
2446 }}
2447 }
[319]2448 }
2449
2450 limit, err := strconv.Atoi(limitStr)
[670]2451 if err != nil || limit < 0 || limit > chatHistoryLimit {
[319]2452 return ircError{&irc.Message{
2453 Command: "FAIL",
[456]2454 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, limitStr, "Invalid limit"},
[319]2455 }}
2456 }
2457
[665]2458 eventPlayback := dc.caps["draft/event-playback"]
2459
[387]2460 var history []*irc.Message
[319]2461 switch subcommand {
2462 case "BEFORE":
[667]2463 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], time.Time{}, limit, eventPlayback)
[360]2464 case "AFTER":
[667]2465 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], time.Now(), limit, eventPlayback)
[516]2466 case "BETWEEN":
2467 if bounds[0].Before(bounds[1]) {
[667]2468 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
[516]2469 } else {
[667]2470 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
[516]2471 }
[549]2472 case "TARGETS":
2473 // TODO: support TARGETS in multi-upstream mode
[667]2474 targets, err := store.ListTargets(ctx, &network.Network, bounds[0], bounds[1], limit, eventPlayback)
[549]2475 if err != nil {
[627]2476 dc.logger.Printf("failed fetching targets for chathistory: %v", err)
[549]2477 return ircError{&irc.Message{
2478 Command: "FAIL",
2479 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, "Failed to retrieve targets"},
2480 }}
2481 }
2482
[551]2483 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {
2484 for _, target := range targets {
[585]2485 if ch := network.channels.Value(target.Name); ch != nil && ch.Detached {
[551]2486 continue
2487 }
[549]2488
[551]2489 dc.SendMessage(&irc.Message{
2490 Tags: irc.Tags{"batch": batchRef},
2491 Prefix: dc.srv.prefix(),
2492 Command: "CHATHISTORY",
2493 Params: []string{"TARGETS", target.Name, target.LatestMessage.UTC().Format(serverTimeLayout)},
2494 })
[550]2495 }
[549]2496 })
2497
2498 return nil
[319]2499 }
[387]2500 if err != nil {
[515]2501 dc.logger.Printf("failed fetching %q messages for chathistory: %v", target, err)
[387]2502 return newChatHistoryError(subcommand, target)
2503 }
2504
[551]2505 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {
2506 for _, msg := range history {
2507 msg.Tags["batch"] = batchRef
[585]2508 dc.SendMessage(dc.marshalMessage(msg, network))
[551]2509 }
[387]2510 })
[532]2511 case "BOUNCER":
2512 var subcommand string
2513 if err := parseMessageParams(msg, &subcommand); err != nil {
2514 return err
2515 }
2516
2517 switch strings.ToUpper(subcommand) {
[646]2518 case "BIND":
2519 return ircError{&irc.Message{
2520 Command: "FAIL",
2521 Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind to a network after registration"},
2522 }}
[532]2523 case "LISTNETWORKS":
[551]2524 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
2525 dc.user.forEachNetwork(func(network *network) {
2526 idStr := fmt.Sprintf("%v", network.ID)
2527 attrs := getNetworkAttrs(network)
2528 dc.SendMessage(&irc.Message{
2529 Tags: irc.Tags{"batch": batchRef},
2530 Prefix: dc.srv.prefix(),
2531 Command: "BOUNCER",
2532 Params: []string{"NETWORK", idStr, attrs.String()},
2533 })
[532]2534 })
2535 })
2536 case "ADDNETWORK":
2537 var attrsStr string
2538 if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
2539 return err
2540 }
2541 attrs := irc.ParseTags(attrsStr)
2542
[654]2543 record := &Network{Nick: dc.nick, Enabled: true}
2544 if err := updateNetworkAttrs(record, attrs, subcommand); err != nil {
2545 return err
[532]2546 }
2547
[664]2548 if record.Nick == dc.user.Username {
2549 record.Nick = ""
2550 }
[654]2551 if record.Realname == dc.user.Realname {
2552 record.Realname = ""
[532]2553 }
2554
[676]2555 network, err := dc.user.createNetwork(ctx, record)
[532]2556 if err != nil {
2557 return ircError{&irc.Message{
2558 Command: "FAIL",
2559 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
2560 }}
2561 }
2562
2563 dc.SendMessage(&irc.Message{
2564 Prefix: dc.srv.prefix(),
2565 Command: "BOUNCER",
2566 Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
2567 })
2568 case "CHANGENETWORK":
2569 var idStr, attrsStr string
2570 if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
2571 return err
2572 }
[535]2573 id, err := parseBouncerNetID(subcommand, idStr)
[532]2574 if err != nil {
2575 return err
2576 }
2577 attrs := irc.ParseTags(attrsStr)
2578
2579 net := dc.user.getNetworkByID(id)
2580 if net == nil {
2581 return ircError{&irc.Message{
2582 Command: "FAIL",
[535]2583 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
[532]2584 }}
2585 }
2586
2587 record := net.Network // copy network record because we'll mutate it
[654]2588 if err := updateNetworkAttrs(&record, attrs, subcommand); err != nil {
2589 return err
[532]2590 }
2591
[664]2592 if record.Nick == dc.user.Username {
2593 record.Nick = ""
2594 }
[654]2595 if record.Realname == dc.user.Realname {
2596 record.Realname = ""
2597 }
2598
[676]2599 _, err = dc.user.updateNetwork(ctx, &record)
[532]2600 if err != nil {
2601 return ircError{&irc.Message{
2602 Command: "FAIL",
2603 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
2604 }}
2605 }
2606
2607 dc.SendMessage(&irc.Message{
2608 Prefix: dc.srv.prefix(),
2609 Command: "BOUNCER",
2610 Params: []string{"CHANGENETWORK", idStr},
2611 })
2612 case "DELNETWORK":
2613 var idStr string
2614 if err := parseMessageParams(msg, nil, &idStr); err != nil {
2615 return err
2616 }
[535]2617 id, err := parseBouncerNetID(subcommand, idStr)
[532]2618 if err != nil {
2619 return err
2620 }
2621
2622 net := dc.user.getNetworkByID(id)
2623 if net == nil {
2624 return ircError{&irc.Message{
2625 Command: "FAIL",
[535]2626 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
[532]2627 }}
2628 }
2629
[676]2630 if err := dc.user.deleteNetwork(ctx, net.ID); err != nil {
[532]2631 return err
2632 }
2633
2634 dc.SendMessage(&irc.Message{
2635 Prefix: dc.srv.prefix(),
2636 Command: "BOUNCER",
2637 Params: []string{"DELNETWORK", idStr},
2638 })
2639 default:
2640 return ircError{&irc.Message{
2641 Command: "FAIL",
2642 Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
2643 }}
2644 }
[13]2645 default:
[55]2646 dc.logger.Printf("unhandled message: %v", msg)
[547]2647
2648 // Only forward unknown commands in single-upstream mode
2649 uc := dc.upstream()
2650 if uc == nil {
2651 return newUnknownCommandError(msg.Command)
2652 }
2653
2654 uc.SendMessageLabeled(dc.id, msg)
[13]2655 }
[42]2656 return nil
[13]2657}
[95]2658
[675]2659func (dc *downstreamConn) handleNickServPRIVMSG(ctx context.Context, uc *upstreamConn, text string) {
[95]2660 username, password, ok := parseNickServCredentials(text, uc.nick)
2661 if !ok {
2662 return
2663 }
2664
[307]2665 // User may have e.g. EXTERNAL mechanism configured. We do not want to
2666 // automatically erase the key pair or any other credentials.
2667 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
2668 return
2669 }
2670
[95]2671 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
2672 n := uc.network
2673 n.SASL.Mechanism = "PLAIN"
2674 n.SASL.Plain.Username = username
2675 n.SASL.Plain.Password = password
[675]2676 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
[95]2677 dc.logger.Printf("failed to save NickServ credentials: %v", err)
2678 }
2679}
2680
2681func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
2682 fields := strings.Fields(text)
2683 if len(fields) < 2 {
2684 return "", "", false
2685 }
2686 cmd := strings.ToUpper(fields[0])
2687 params := fields[1:]
2688 switch cmd {
2689 case "REGISTER":
2690 username = nick
2691 password = params[0]
2692 case "IDENTIFY":
2693 if len(params) == 1 {
2694 username = nick
[182]2695 password = params[0]
[95]2696 } else {
2697 username = params[0]
[182]2698 password = params[1]
[95]2699 }
[182]2700 case "SET":
2701 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
2702 username = nick
2703 password = params[1]
2704 }
[340]2705 default:
2706 return "", "", false
[95]2707 }
2708 return username, password, true
2709}
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