source: code/trunk/downstream.go@ 702

Last change on this file since 702 was 702, checked in by contact, 4 years ago

Lift up context to downstreamConn.handleMessage
File size: 68.3 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
[55]617func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
[702]618 ctx, cancel := context.WithTimeout(context.TODO(), handleDownstreamMessageTimeout)
619 defer cancel()
620
[13]621 switch msg.Command {
[28]622 case "QUIT":
[55]623 return dc.Close()
[13]624 default:
[55]625 if dc.registered {
[702]626 return dc.handleMessageRegistered(ctx, msg)
[13]627 } else {
[702]628 return dc.handleMessageUnregistered(ctx, msg)
[13]629 }
630 }
631}
632
[702]633func (dc *downstreamConn) handleMessageUnregistered(ctx context.Context, msg *irc.Message) error {
[13]634 switch msg.Command {
635 case "NICK":
[117]636 var nick string
637 if err := parseMessageParams(msg, &nick); err != nil {
[43]638 return err
[13]639 }
[404]640 if strings.ContainsAny(nick, illegalNickChars) {
641 return ircError{&irc.Message{
642 Command: irc.ERR_ERRONEUSNICKNAME,
643 Params: []string{dc.nick, nick, "contains illegal characters"},
644 }}
645 }
[478]646 nickCM := casemapASCII(nick)
647 if nickCM == serviceNickCM {
[117]648 return ircError{&irc.Message{
649 Command: irc.ERR_NICKNAMEINUSE,
650 Params: []string{dc.nick, nick, "Nickname reserved for bouncer service"},
651 }}
652 }
653 dc.nick = nick
[478]654 dc.nickCM = nickCM
[13]655 case "USER":
[117]656 if err := parseMessageParams(msg, &dc.rawUsername, nil, nil, &dc.realname); err != nil {
[43]657 return err
[13]658 }
[85]659 case "PASS":
660 if err := parseMessageParams(msg, &dc.password); err != nil {
661 return err
662 }
[108]663 case "CAP":
664 var subCmd string
665 if err := parseMessageParams(msg, &subCmd); err != nil {
666 return err
667 }
668 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
669 return err
670 }
[112]671 case "AUTHENTICATE":
[230]672 if !dc.caps["sasl"] {
[112]673 return ircError{&irc.Message{
[125]674 Command: irc.ERR_SASLFAIL,
[112]675 Params: []string{"*", "AUTHENTICATE requires the \"sasl\" capability to be enabled"},
676 }}
677 }
678 if len(msg.Params) == 0 {
679 return ircError{&irc.Message{
[125]680 Command: irc.ERR_SASLFAIL,
[112]681 Params: []string{"*", "Missing AUTHENTICATE argument"},
682 }}
683 }
684 if dc.nick == "" {
685 return ircError{&irc.Message{
[125]686 Command: irc.ERR_SASLFAIL,
[112]687 Params: []string{"*", "Expected NICK command before AUTHENTICATE"},
688 }}
689 }
690
691 var resp []byte
[653]692 if msg.Params[0] == "*" {
693 dc.saslServer = nil
694 return ircError{&irc.Message{
695 Command: irc.ERR_SASLABORTED,
696 Params: []string{"*", "SASL authentication aborted"},
697 }}
698 } else if dc.saslServer == nil {
[112]699 mech := strings.ToUpper(msg.Params[0])
700 switch mech {
701 case "PLAIN":
702 dc.saslServer = sasl.NewPlainServer(sasl.PlainAuthenticator(func(identity, username, password string) error {
[700]703 // TODO: we can't use the command context here, because it
704 // gets cancelled once the command handler returns. SASL
705 // might take multiple AUTHENTICATE commands to complete.
706 return dc.authenticate(context.TODO(), username, password)
[112]707 }))
708 default:
709 return ircError{&irc.Message{
[125]710 Command: irc.ERR_SASLFAIL,
[112]711 Params: []string{"*", fmt.Sprintf("Unsupported SASL mechanism %q", mech)},
712 }}
713 }
714 } else if msg.Params[0] == "+" {
715 resp = nil
716 } else {
717 // TODO: multi-line messages
718 var err error
719 resp, err = base64.StdEncoding.DecodeString(msg.Params[0])
720 if err != nil {
721 dc.saslServer = nil
722 return ircError{&irc.Message{
[125]723 Command: irc.ERR_SASLFAIL,
[112]724 Params: []string{"*", "Invalid base64-encoded response"},
725 }}
726 }
727 }
728
729 challenge, done, err := dc.saslServer.Next(resp)
730 if err != nil {
731 dc.saslServer = nil
732 if ircErr, ok := err.(ircError); ok && ircErr.Message.Command == irc.ERR_PASSWDMISMATCH {
733 return ircError{&irc.Message{
[125]734 Command: irc.ERR_SASLFAIL,
[112]735 Params: []string{"*", ircErr.Message.Params[1]},
736 }}
737 }
738 dc.SendMessage(&irc.Message{
739 Prefix: dc.srv.prefix(),
[125]740 Command: irc.ERR_SASLFAIL,
[112]741 Params: []string{"*", "SASL error"},
742 })
743 return fmt.Errorf("SASL authentication failed: %v", err)
744 } else if done {
745 dc.saslServer = nil
746 dc.SendMessage(&irc.Message{
747 Prefix: dc.srv.prefix(),
[125]748 Command: irc.RPL_LOGGEDIN,
[306]749 Params: []string{dc.nick, dc.prefix().String(), dc.user.Username, "You are now logged in"},
[112]750 })
751 dc.SendMessage(&irc.Message{
752 Prefix: dc.srv.prefix(),
[125]753 Command: irc.RPL_SASLSUCCESS,
[112]754 Params: []string{dc.nick, "SASL authentication successful"},
755 })
756 } else {
757 challengeStr := "+"
[135]758 if len(challenge) > 0 {
[112]759 challengeStr = base64.StdEncoding.EncodeToString(challenge)
760 }
761
762 // TODO: multi-line messages
763 dc.SendMessage(&irc.Message{
764 Prefix: dc.srv.prefix(),
765 Command: "AUTHENTICATE",
766 Params: []string{challengeStr},
767 })
768 }
[532]769 case "BOUNCER":
770 var subcommand string
771 if err := parseMessageParams(msg, &subcommand); err != nil {
772 return err
773 }
774
775 switch strings.ToUpper(subcommand) {
776 case "BIND":
777 var idStr string
778 if err := parseMessageParams(msg, nil, &idStr); err != nil {
779 return err
780 }
781
782 if dc.user == nil {
783 return ircError{&irc.Message{
784 Command: "FAIL",
785 Params: []string{"BOUNCER", "ACCOUNT_REQUIRED", "BIND", "Authentication needed to bind to bouncer network"},
786 }}
787 }
788
[535]789 id, err := parseBouncerNetID(subcommand, idStr)
[532]790 if err != nil {
791 return err
792 }
793
794 var match *network
795 dc.user.forEachNetwork(func(net *network) {
796 if net.ID == id {
797 match = net
798 }
799 })
800 if match == nil {
801 return ircError{&irc.Message{
802 Command: "FAIL",
803 Params: []string{"BOUNCER", "INVALID_NETID", idStr, "Unknown network ID"},
804 }}
805 }
806
807 dc.networkName = match.GetName()
808 }
[13]809 default:
[55]810 dc.logger.Printf("unhandled message: %v", msg)
[13]811 return newUnknownCommandError(msg.Command)
812 }
[590]813 if dc.rawUsername != "" && dc.nick != "" && !dc.negotiatingCaps {
[700]814 return dc.register(ctx)
[13]815 }
816 return nil
817}
818
[108]819func (dc *downstreamConn) handleCapCommand(cmd string, args []string) error {
[111]820 cmd = strings.ToUpper(cmd)
821
[108]822 replyTo := dc.nick
823 if !dc.registered {
824 replyTo = "*"
825 }
826
827 switch cmd {
828 case "LS":
829 if len(args) > 0 {
830 var err error
831 if dc.capVersion, err = strconv.Atoi(args[0]); err != nil {
832 return err
833 }
834 }
[437]835 if !dc.registered && dc.capVersion >= 302 {
836 // Let downstream show everything it supports, and trim
837 // down the available capabilities when upstreams are
838 // known.
839 for k, v := range needAllDownstreamCaps {
840 dc.supportedCaps[k] = v
841 }
842 }
[108]843
[275]844 caps := make([]string, 0, len(dc.supportedCaps))
845 for k, v := range dc.supportedCaps {
846 if dc.capVersion >= 302 && v != "" {
[276]847 caps = append(caps, k+"="+v)
[275]848 } else {
849 caps = append(caps, k)
850 }
[112]851 }
[108]852
853 // TODO: multi-line replies
854 dc.SendMessage(&irc.Message{
855 Prefix: dc.srv.prefix(),
856 Command: "CAP",
857 Params: []string{replyTo, "LS", strings.Join(caps, " ")},
858 })
859
[275]860 if dc.capVersion >= 302 {
861 // CAP version 302 implicitly enables cap-notify
862 dc.caps["cap-notify"] = true
863 }
864
[108]865 if !dc.registered {
[590]866 dc.negotiatingCaps = true
[108]867 }
868 case "LIST":
869 var caps []string
[521]870 for name, enabled := range dc.caps {
871 if enabled {
872 caps = append(caps, name)
873 }
[108]874 }
875
876 // TODO: multi-line replies
877 dc.SendMessage(&irc.Message{
878 Prefix: dc.srv.prefix(),
879 Command: "CAP",
880 Params: []string{replyTo, "LIST", strings.Join(caps, " ")},
881 })
882 case "REQ":
883 if len(args) == 0 {
884 return ircError{&irc.Message{
885 Command: err_invalidcapcmd,
886 Params: []string{replyTo, cmd, "Missing argument in CAP REQ command"},
887 }}
888 }
889
[275]890 // TODO: atomically ack/nak the whole capability set
[108]891 caps := strings.Fields(args[0])
892 ack := true
893 for _, name := range caps {
894 name = strings.ToLower(name)
895 enable := !strings.HasPrefix(name, "-")
896 if !enable {
897 name = strings.TrimPrefix(name, "-")
898 }
899
[275]900 if enable == dc.caps[name] {
[108]901 continue
902 }
903
[275]904 _, ok := dc.supportedCaps[name]
905 if !ok {
[108]906 ack = false
[275]907 break
[108]908 }
[275]909
910 if name == "cap-notify" && dc.capVersion >= 302 && !enable {
911 // cap-notify cannot be disabled with CAP version 302
912 ack = false
913 break
914 }
915
916 dc.caps[name] = enable
[108]917 }
918
919 reply := "NAK"
920 if ack {
921 reply = "ACK"
922 }
923 dc.SendMessage(&irc.Message{
924 Prefix: dc.srv.prefix(),
925 Command: "CAP",
926 Params: []string{replyTo, reply, args[0]},
927 })
[590]928
929 if !dc.registered {
930 dc.negotiatingCaps = true
931 }
[108]932 case "END":
[590]933 dc.negotiatingCaps = false
[108]934 default:
935 return ircError{&irc.Message{
936 Command: err_invalidcapcmd,
937 Params: []string{replyTo, cmd, "Unknown CAP command"},
938 }}
939 }
940 return nil
941}
942
[275]943func (dc *downstreamConn) setSupportedCap(name, value string) {
944 prevValue, hasPrev := dc.supportedCaps[name]
945 changed := !hasPrev || prevValue != value
946 dc.supportedCaps[name] = value
947
948 if !dc.caps["cap-notify"] || !changed {
949 return
950 }
951
952 replyTo := dc.nick
953 if !dc.registered {
954 replyTo = "*"
955 }
956
957 cap := name
958 if value != "" && dc.capVersion >= 302 {
959 cap = name + "=" + value
960 }
961
962 dc.SendMessage(&irc.Message{
963 Prefix: dc.srv.prefix(),
964 Command: "CAP",
965 Params: []string{replyTo, "NEW", cap},
966 })
967}
968
969func (dc *downstreamConn) unsetSupportedCap(name string) {
970 _, hasPrev := dc.supportedCaps[name]
971 delete(dc.supportedCaps, name)
972 delete(dc.caps, name)
973
974 if !dc.caps["cap-notify"] || !hasPrev {
975 return
976 }
977
978 replyTo := dc.nick
979 if !dc.registered {
980 replyTo = "*"
981 }
982
983 dc.SendMessage(&irc.Message{
984 Prefix: dc.srv.prefix(),
985 Command: "CAP",
986 Params: []string{replyTo, "DEL", name},
987 })
988}
989
[276]990func (dc *downstreamConn) updateSupportedCaps() {
[292]991 supportedCaps := make(map[string]bool)
992 for cap := range needAllDownstreamCaps {
993 supportedCaps[cap] = true
994 }
[276]995 dc.forEachUpstream(func(uc *upstreamConn) {
[292]996 for cap, supported := range supportedCaps {
997 supportedCaps[cap] = supported && uc.caps[cap]
998 }
[276]999 })
1000
[292]1001 for cap, supported := range supportedCaps {
1002 if supported {
1003 dc.setSupportedCap(cap, needAllDownstreamCaps[cap])
1004 } else {
1005 dc.unsetSupportedCap(cap)
1006 }
[276]1007 }
[665]1008
[691]1009 if _, ok := dc.user.msgStore.(chatHistoryMessageStore); ok && dc.network != nil {
[665]1010 dc.setSupportedCap("draft/event-playback", "")
1011 } else {
1012 dc.unsetSupportedCap("draft/event-playback")
1013 }
[276]1014}
1015
[296]1016func (dc *downstreamConn) updateNick() {
1017 if uc := dc.upstream(); uc != nil && uc.nick != dc.nick {
1018 dc.SendMessage(&irc.Message{
1019 Prefix: dc.prefix(),
1020 Command: "NICK",
1021 Params: []string{uc.nick},
1022 })
1023 dc.nick = uc.nick
[478]1024 dc.nickCM = casemapASCII(dc.nick)
[296]1025 }
1026}
1027
[540]1028func (dc *downstreamConn) updateRealname() {
1029 if uc := dc.upstream(); uc != nil && uc.realname != dc.realname && dc.caps["setname"] {
1030 dc.SendMessage(&irc.Message{
1031 Prefix: dc.prefix(),
1032 Command: "SETNAME",
1033 Params: []string{uc.realname},
1034 })
1035 dc.realname = uc.realname
1036 }
1037}
1038
[698]1039func sanityCheckServer(ctx context.Context, addr string) error {
[699]1040 ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
[698]1041 defer cancel()
1042
1043 conn, err := new(tls.Dialer).DialContext(ctx, "tcp", addr)
[91]1044 if err != nil {
1045 return err
1046 }
[698]1047
[91]1048 return conn.Close()
1049}
1050
[183]1051func unmarshalUsername(rawUsername string) (username, client, network string) {
[112]1052 username = rawUsername
[183]1053
1054 i := strings.IndexAny(username, "/@")
1055 j := strings.LastIndexAny(username, "/@")
1056 if i >= 0 {
1057 username = rawUsername[:i]
[73]1058 }
[183]1059 if j >= 0 {
[190]1060 if rawUsername[j] == '@' {
1061 client = rawUsername[j+1:]
1062 } else {
1063 network = rawUsername[j+1:]
1064 }
[73]1065 }
[183]1066 if i >= 0 && j >= 0 && i < j {
[190]1067 if rawUsername[i] == '@' {
1068 client = rawUsername[i+1 : j]
1069 } else {
1070 network = rawUsername[i+1 : j]
1071 }
[183]1072 }
1073
1074 return username, client, network
[112]1075}
[73]1076
[700]1077func (dc *downstreamConn) authenticate(ctx context.Context, username, password string) error {
[183]1078 username, clientName, networkName := unmarshalUsername(username)
[168]1079
[700]1080 u, err := dc.srv.db.GetUser(ctx, username)
[173]1081 if err != nil {
[438]1082 dc.logger.Printf("failed authentication for %q: user not found: %v", username, err)
[168]1083 return errAuthFailed
1084 }
1085
[322]1086 // Password auth disabled
1087 if u.Password == "" {
1088 return errAuthFailed
1089 }
1090
[173]1091 err = bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
[168]1092 if err != nil {
[438]1093 dc.logger.Printf("failed authentication for %q: wrong password: %v", username, err)
[168]1094 return errAuthFailed
1095 }
1096
[173]1097 dc.user = dc.srv.getUser(username)
1098 if dc.user == nil {
1099 dc.logger.Printf("failed authentication for %q: user not active", username)
1100 return errAuthFailed
1101 }
[183]1102 dc.clientName = clientName
[168]1103 dc.networkName = networkName
1104 return nil
1105}
1106
[700]1107func (dc *downstreamConn) register(ctx context.Context) error {
[168]1108 if dc.registered {
1109 return fmt.Errorf("tried to register twice")
1110 }
1111
1112 password := dc.password
1113 dc.password = ""
1114 if dc.user == nil {
[700]1115 if err := dc.authenticate(ctx, dc.rawUsername, password); err != nil {
[168]1116 return err
1117 }
1118 }
1119
[183]1120 if dc.clientName == "" && dc.networkName == "" {
1121 _, dc.clientName, dc.networkName = unmarshalUsername(dc.rawUsername)
[168]1122 }
1123
1124 dc.registered = true
[184]1125 dc.logger.Printf("registration complete for user %q", dc.user.Username)
[168]1126 return nil
1127}
1128
[701]1129func (dc *downstreamConn) loadNetwork(ctx context.Context) error {
[168]1130 if dc.networkName == "" {
[112]1131 return nil
1132 }
[85]1133
[168]1134 network := dc.user.getNetwork(dc.networkName)
[112]1135 if network == nil {
[168]1136 addr := dc.networkName
[112]1137 if !strings.ContainsRune(addr, ':') {
1138 addr = addr + ":6697"
1139 }
1140
1141 dc.logger.Printf("trying to connect to new network %q", addr)
[701]1142 if err := sanityCheckServer(ctx, addr); err != nil {
[112]1143 dc.logger.Printf("failed to connect to %q: %v", addr, err)
1144 return ircError{&irc.Message{
1145 Command: irc.ERR_PASSWDMISMATCH,
[168]1146 Params: []string{"*", fmt.Sprintf("Failed to connect to %q", dc.networkName)},
[112]1147 }}
1148 }
1149
[354]1150 // Some clients only allow specifying the nickname (and use the
1151 // nickname as a username too). Strip the network name from the
1152 // nickname when auto-saving networks.
1153 nick, _, _ := unmarshalUsername(dc.nick)
1154
[168]1155 dc.logger.Printf("auto-saving network %q", dc.networkName)
[112]1156 var err error
[701]1157 network, err = dc.user.createNetwork(ctx, &Network{
[542]1158 Addr: dc.networkName,
1159 Nick: nick,
1160 Enabled: true,
[120]1161 })
[112]1162 if err != nil {
1163 return err
1164 }
1165 }
1166
1167 dc.network = network
1168 return nil
1169}
1170
[701]1171func (dc *downstreamConn) welcome(ctx context.Context) error {
[168]1172 if dc.user == nil || !dc.registered {
1173 panic("tried to welcome an unregistered connection")
[37]1174 }
1175
[168]1176 // TODO: doing this might take some time. We should do it in dc.register
1177 // instead, but we'll potentially be adding a new network and this must be
1178 // done in the user goroutine.
[701]1179 if err := dc.loadNetwork(ctx); err != nil {
[168]1180 return err
[85]1181 }
1182
[694]1183 if dc.network == nil && !dc.caps["soju.im/bouncer-networks"] && dc.srv.Config().MultiUpstream {
[693]1184 dc.isMultiUpstream = true
1185 }
1186
[446]1187 isupport := []string{
[670]1188 fmt.Sprintf("CHATHISTORY=%v", chatHistoryLimit),
[478]1189 "CASEMAPPING=ascii",
[446]1190 }
1191
[532]1192 if dc.network != nil {
1193 isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
1194 }
[691]1195 if title := dc.srv.Config().Title; dc.network == nil && title != "" {
1196 isupport = append(isupport, "NETWORK="+encodeISUPPORT(title))
[662]1197 }
[693]1198 if dc.network == nil && !dc.isMultiUpstream {
[660]1199 isupport = append(isupport, "WHOX")
1200 }
1201
[463]1202 if uc := dc.upstream(); uc != nil {
1203 for k := range passthroughIsupport {
1204 v, ok := uc.isupport[k]
1205 if !ok {
1206 continue
1207 }
1208 if v != nil {
1209 isupport = append(isupport, fmt.Sprintf("%v=%v", k, *v))
1210 } else {
1211 isupport = append(isupport, k)
1212 }
1213 }
[447]1214 }
1215
[55]1216 dc.SendMessage(&irc.Message{
1217 Prefix: dc.srv.prefix(),
[13]1218 Command: irc.RPL_WELCOME,
[98]1219 Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
[54]1220 })
[55]1221 dc.SendMessage(&irc.Message{
1222 Prefix: dc.srv.prefix(),
[13]1223 Command: irc.RPL_YOURHOST,
[691]1224 Params: []string{dc.nick, "Your host is " + dc.srv.Config().Hostname},
[54]1225 })
[55]1226 dc.SendMessage(&irc.Message{
1227 Prefix: dc.srv.prefix(),
[13]1228 Command: irc.RPL_MYINFO,
[691]1229 Params: []string{dc.nick, dc.srv.Config().Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
[54]1230 })
[463]1231 for _, msg := range generateIsupport(dc.srv.prefix(), dc.nick, isupport) {
1232 dc.SendMessage(msg)
1233 }
[553]1234 if uc := dc.upstream(); uc != nil {
1235 dc.SendMessage(&irc.Message{
1236 Prefix: dc.srv.prefix(),
1237 Command: irc.RPL_UMODEIS,
[672]1238 Params: []string{dc.nick, "+" + string(uc.modes)},
[553]1239 })
1240 }
[693]1241 if dc.network == nil && !dc.isMultiUpstream && dc.user.Admin {
[671]1242 dc.SendMessage(&irc.Message{
1243 Prefix: dc.srv.prefix(),
1244 Command: irc.RPL_UMODEIS,
1245 Params: []string{dc.nick, "+o"},
1246 })
1247 }
[13]1248
[691]1249 if motd := dc.user.srv.Config().MOTD; motd != "" && dc.network == nil {
[636]1250 for _, msg := range generateMOTD(dc.srv.prefix(), dc.nick, motd) {
1251 dc.SendMessage(msg)
1252 }
1253 } else {
1254 motdHint := "No MOTD"
1255 if dc.network != nil {
1256 motdHint = "Use /motd to read the message of the day"
1257 }
1258 dc.SendMessage(&irc.Message{
1259 Prefix: dc.srv.prefix(),
1260 Command: irc.ERR_NOMOTD,
1261 Params: []string{dc.nick, motdHint},
1262 })
1263 }
1264
[296]1265 dc.updateNick()
[540]1266 dc.updateRealname()
[437]1267 dc.updateSupportedCaps()
[296]1268
[535]1269 if dc.caps["soju.im/bouncer-networks-notify"] {
[551]1270 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
1271 dc.user.forEachNetwork(func(network *network) {
1272 idStr := fmt.Sprintf("%v", network.ID)
1273 attrs := getNetworkAttrs(network)
1274 dc.SendMessage(&irc.Message{
1275 Tags: irc.Tags{"batch": batchRef},
1276 Prefix: dc.srv.prefix(),
1277 Command: "BOUNCER",
1278 Params: []string{"NETWORK", idStr, attrs.String()},
1279 })
[535]1280 })
1281 })
1282 }
1283
[73]1284 dc.forEachUpstream(func(uc *upstreamConn) {
[478]1285 for _, entry := range uc.channels.innerMap {
1286 ch := entry.value.(*upstreamChannel)
[284]1287 if !ch.complete {
1288 continue
1289 }
[478]1290 record := uc.network.channels.Value(ch.Name)
1291 if record != nil && record.Detached {
[284]1292 continue
1293 }
[132]1294
[284]1295 dc.SendMessage(&irc.Message{
1296 Prefix: dc.prefix(),
1297 Command: "JOIN",
1298 Params: []string{dc.marshalEntity(ch.conn.network, ch.Name)},
1299 })
1300
1301 forwardChannel(dc, ch)
[30]1302 }
[143]1303 })
[50]1304
[143]1305 dc.forEachNetwork(func(net *network) {
[496]1306 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
1307 return
1308 }
1309
[253]1310 // Only send history if we're the first connected client with that name
1311 // for the network
[482]1312 firstClient := true
1313 dc.user.forEachDownstream(func(c *downstreamConn) {
1314 if c != dc && c.clientName == dc.clientName && c.network == dc.network {
1315 firstClient = false
1316 }
1317 })
1318 if firstClient {
[485]1319 net.delivered.ForEachTarget(func(target string) {
[495]1320 lastDelivered := net.delivered.LoadID(target, dc.clientName)
1321 if lastDelivered == "" {
1322 return
1323 }
1324
[701]1325 dc.sendTargetBacklog(ctx, net, target, lastDelivered)
[495]1326
1327 // Fast-forward history to last message
1328 targetCM := net.casemap(target)
[666]1329 lastID, err := dc.user.msgStore.LastMsgID(&net.Network, targetCM, time.Now())
[495]1330 if err != nil {
1331 dc.logger.Printf("failed to get last message ID: %v", err)
1332 return
1333 }
1334 net.delivered.StoreID(target, dc.clientName, lastID)
[485]1335 })
[227]1336 }
[253]1337 })
[57]1338
[253]1339 return nil
1340}
[144]1341
[665]1342// messageSupportsBacklog checks whether the provided message can be sent as
[428]1343// part of an history batch.
[665]1344func (dc *downstreamConn) messageSupportsBacklog(msg *irc.Message) bool {
[428]1345 // Don't replay all messages, because that would mess up client
1346 // state. For instance we just sent the list of users, sending
1347 // PART messages for one of these users would be incorrect.
1348 switch msg.Command {
1349 case "PRIVMSG", "NOTICE":
1350 return true
1351 }
1352 return false
1353}
1354
[701]1355func (dc *downstreamConn) sendTargetBacklog(ctx context.Context, net *network, target, msgID string) {
[423]1356 if dc.caps["draft/chathistory"] || dc.user.msgStore == nil {
[319]1357 return
1358 }
[485]1359
[499]1360 ch := net.channels.Value(target)
1361
[701]1362 ctx, cancel := context.WithTimeout(ctx, backlogTimeout)
[667]1363 defer cancel()
1364
[484]1365 targetCM := net.casemap(target)
[670]1366 history, err := dc.user.msgStore.LoadLatestID(ctx, &net.Network, targetCM, msgID, backlogLimit)
[452]1367 if err != nil {
[495]1368 dc.logger.Printf("failed to send backlog for %q: %v", target, err)
[452]1369 return
1370 }
[253]1371
[551]1372 dc.SendBatch("chathistory", []string{dc.marshalEntity(net, target)}, nil, func(batchRef irc.TagValue) {
1373 for _, msg := range history {
1374 if ch != nil && ch.Detached {
1375 if net.detachedMessageNeedsRelay(ch, msg) {
1376 dc.relayDetachedMessage(net, msg)
1377 }
1378 } else {
[651]1379 msg.Tags["batch"] = batchRef
[551]1380 dc.SendMessage(dc.marshalMessage(msg, net))
[499]1381 }
[256]1382 }
[551]1383 })
[13]1384}
1385
[499]1386func (dc *downstreamConn) relayDetachedMessage(net *network, msg *irc.Message) {
1387 if msg.Command != "PRIVMSG" && msg.Command != "NOTICE" {
1388 return
1389 }
1390
1391 sender := msg.Prefix.Name
1392 target, text := msg.Params[0], msg.Params[1]
1393 if net.isHighlight(msg) {
1394 sendServiceNOTICE(dc, fmt.Sprintf("highlight in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1395 } else {
1396 sendServiceNOTICE(dc, fmt.Sprintf("message in %v: <%v> %v", dc.marshalEntity(net, target), sender, text))
1397 }
1398}
1399
[103]1400func (dc *downstreamConn) runUntilRegistered() error {
1401 for !dc.registered {
[212]1402 msg, err := dc.ReadMessage()
[106]1403 if err != nil {
[655]1404 return fmt.Errorf("failed to read IRC command: %w", err)
[103]1405 }
1406
1407 err = dc.handleMessage(msg)
1408 if ircErr, ok := err.(ircError); ok {
1409 ircErr.Message.Prefix = dc.srv.prefix()
1410 dc.SendMessage(ircErr.Message)
1411 } else if err != nil {
1412 return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
1413 }
1414 }
1415
1416 return nil
1417}
1418
[702]1419func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.Message) error {
[13]1420 switch msg.Command {
[111]1421 case "CAP":
1422 var subCmd string
1423 if err := parseMessageParams(msg, &subCmd); err != nil {
1424 return err
1425 }
1426 if err := dc.handleCapCommand(subCmd, msg.Params[1:]); err != nil {
1427 return err
1428 }
[107]1429 case "PING":
[412]1430 var source, destination string
1431 if err := parseMessageParams(msg, &source); err != nil {
1432 return err
1433 }
1434 if len(msg.Params) > 1 {
1435 destination = msg.Params[1]
1436 }
[691]1437 hostname := dc.srv.Config().Hostname
1438 if destination != "" && destination != hostname {
[412]1439 return ircError{&irc.Message{
1440 Command: irc.ERR_NOSUCHSERVER,
[413]1441 Params: []string{dc.nick, destination, "No such server"},
[412]1442 }}
1443 }
[107]1444 dc.SendMessage(&irc.Message{
1445 Prefix: dc.srv.prefix(),
1446 Command: "PONG",
[691]1447 Params: []string{hostname, source},
[107]1448 })
1449 return nil
[428]1450 case "PONG":
1451 if len(msg.Params) == 0 {
1452 return newNeedMoreParamsError(msg.Command)
1453 }
1454 token := msg.Params[len(msg.Params)-1]
1455 dc.handlePong(token)
[42]1456 case "USER":
[13]1457 return ircError{&irc.Message{
1458 Command: irc.ERR_ALREADYREGISTERED,
[55]1459 Params: []string{dc.nick, "You may not reregister"},
[13]1460 }}
[42]1461 case "NICK":
[429]1462 var rawNick string
1463 if err := parseMessageParams(msg, &rawNick); err != nil {
[90]1464 return err
1465 }
1466
[429]1467 nick := rawNick
[297]1468 var upstream *upstreamConn
1469 if dc.upstream() == nil {
1470 uc, unmarshaledNick, err := dc.unmarshalEntity(nick)
1471 if err == nil { // NICK nick/network: NICK only on a specific upstream
1472 upstream = uc
1473 nick = unmarshaledNick
1474 }
1475 }
1476
[404]1477 if strings.ContainsAny(nick, illegalNickChars) {
1478 return ircError{&irc.Message{
1479 Command: irc.ERR_ERRONEUSNICKNAME,
[430]1480 Params: []string{dc.nick, rawNick, "contains illegal characters"},
[404]1481 }}
1482 }
[478]1483 if casemapASCII(nick) == serviceNickCM {
[429]1484 return ircError{&irc.Message{
1485 Command: irc.ERR_NICKNAMEINUSE,
1486 Params: []string{dc.nick, rawNick, "Nickname reserved for bouncer service"},
1487 }}
1488 }
[404]1489
[90]1490 var err error
1491 dc.forEachNetwork(func(n *network) {
[297]1492 if err != nil || (upstream != nil && upstream.network != n) {
[90]1493 return
1494 }
1495 n.Nick = nick
[675]1496 err = dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network)
[90]1497 })
1498 if err != nil {
1499 return err
1500 }
1501
[73]1502 dc.forEachUpstream(func(uc *upstreamConn) {
[297]1503 if upstream != nil && upstream != uc {
1504 return
1505 }
[301]1506 uc.SendMessageLabeled(dc.id, &irc.Message{
[297]1507 Command: "NICK",
1508 Params: []string{nick},
1509 })
[42]1510 })
[296]1511
[512]1512 if dc.upstream() == nil && upstream == nil && dc.nick != nick {
[296]1513 dc.SendMessage(&irc.Message{
1514 Prefix: dc.prefix(),
1515 Command: "NICK",
1516 Params: []string{nick},
1517 })
1518 dc.nick = nick
[478]1519 dc.nickCM = casemapASCII(dc.nick)
[296]1520 }
[540]1521 case "SETNAME":
1522 var realname string
1523 if err := parseMessageParams(msg, &realname); err != nil {
1524 return err
1525 }
1526
[568]1527 // If the client just resets to the default, just wipe the per-network
1528 // preference
1529 storeRealname := realname
1530 if realname == dc.user.Realname {
1531 storeRealname = ""
1532 }
1533
[540]1534 var storeErr error
1535 var needUpdate []Network
1536 dc.forEachNetwork(func(n *network) {
1537 // We only need to call updateNetwork for upstreams that don't
1538 // support setname
1539 if uc := n.conn; uc != nil && uc.caps["setname"] {
1540 uc.SendMessageLabeled(dc.id, &irc.Message{
1541 Command: "SETNAME",
1542 Params: []string{realname},
1543 })
1544
[568]1545 n.Realname = storeRealname
[675]1546 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
[540]1547 dc.logger.Printf("failed to store network realname: %v", err)
1548 storeErr = err
1549 }
1550 return
1551 }
1552
1553 record := n.Network // copy network record because we'll mutate it
[568]1554 record.Realname = storeRealname
[540]1555 needUpdate = append(needUpdate, record)
1556 })
1557
1558 // Walk the network list as a second step, because updateNetwork
1559 // mutates the original list
1560 for _, record := range needUpdate {
[676]1561 if _, err := dc.user.updateNetwork(ctx, &record); err != nil {
[540]1562 dc.logger.Printf("failed to update network realname: %v", err)
1563 storeErr = err
1564 }
1565 }
1566 if storeErr != nil {
1567 return ircError{&irc.Message{
1568 Command: "FAIL",
1569 Params: []string{"SETNAME", "CANNOT_CHANGE_REALNAME", "Failed to update realname"},
1570 }}
1571 }
1572
[651]1573 if dc.upstream() == nil {
[540]1574 dc.SendMessage(&irc.Message{
1575 Prefix: dc.prefix(),
1576 Command: "SETNAME",
1577 Params: []string{realname},
1578 })
1579 }
[146]1580 case "JOIN":
1581 var namesStr string
1582 if err := parseMessageParams(msg, &namesStr); err != nil {
[48]1583 return err
1584 }
1585
[146]1586 var keys []string
1587 if len(msg.Params) > 1 {
1588 keys = strings.Split(msg.Params[1], ",")
1589 }
1590
1591 for i, name := range strings.Split(namesStr, ",") {
[145]1592 uc, upstreamName, err := dc.unmarshalEntity(name)
1593 if err != nil {
[158]1594 return err
[145]1595 }
[48]1596
[146]1597 var key string
1598 if len(keys) > i {
1599 key = keys[i]
1600 }
1601
[545]1602 if !uc.isChannel(upstreamName) {
1603 dc.SendMessage(&irc.Message{
1604 Prefix: dc.srv.prefix(),
1605 Command: irc.ERR_NOSUCHCHANNEL,
1606 Params: []string{name, "Not a channel name"},
1607 })
1608 continue
1609 }
1610
[146]1611 params := []string{upstreamName}
1612 if key != "" {
1613 params = append(params, key)
1614 }
[301]1615 uc.SendMessageLabeled(dc.id, &irc.Message{
[146]1616 Command: "JOIN",
1617 Params: params,
[145]1618 })
[89]1619
[478]1620 ch := uc.network.channels.Value(upstreamName)
1621 if ch != nil {
[285]1622 // Don't clear the channel key if there's one set
1623 // TODO: add a way to unset the channel key
[435]1624 if key != "" {
1625 ch.Key = key
1626 }
1627 uc.network.attach(ch)
1628 } else {
1629 ch = &Channel{
1630 Name: upstreamName,
1631 Key: key,
1632 }
[478]1633 uc.network.channels.SetValue(upstreamName, ch)
[285]1634 }
[675]1635 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
[222]1636 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
[89]1637 }
1638 }
[146]1639 case "PART":
1640 var namesStr string
1641 if err := parseMessageParams(msg, &namesStr); err != nil {
1642 return err
1643 }
1644
1645 var reason string
1646 if len(msg.Params) > 1 {
1647 reason = msg.Params[1]
1648 }
1649
1650 for _, name := range strings.Split(namesStr, ",") {
1651 uc, upstreamName, err := dc.unmarshalEntity(name)
1652 if err != nil {
[158]1653 return err
[146]1654 }
1655
[284]1656 if strings.EqualFold(reason, "detach") {
[478]1657 ch := uc.network.channels.Value(upstreamName)
1658 if ch != nil {
[435]1659 uc.network.detach(ch)
1660 } else {
1661 ch = &Channel{
1662 Name: name,
1663 Detached: true,
1664 }
[478]1665 uc.network.channels.SetValue(upstreamName, ch)
[284]1666 }
[675]1667 if err := dc.srv.db.StoreChannel(ctx, uc.network.ID, ch); err != nil {
[435]1668 dc.logger.Printf("failed to create or update channel %q: %v", upstreamName, err)
1669 }
[284]1670 } else {
1671 params := []string{upstreamName}
1672 if reason != "" {
1673 params = append(params, reason)
1674 }
[301]1675 uc.SendMessageLabeled(dc.id, &irc.Message{
[284]1676 Command: "PART",
1677 Params: params,
1678 })
[146]1679
[676]1680 if err := uc.network.deleteChannel(ctx, upstreamName); err != nil {
[284]1681 dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
1682 }
[146]1683 }
1684 }
[159]1685 case "KICK":
1686 var channelStr, userStr string
1687 if err := parseMessageParams(msg, &channelStr, &userStr); err != nil {
1688 return err
1689 }
1690
1691 channels := strings.Split(channelStr, ",")
1692 users := strings.Split(userStr, ",")
1693
1694 var reason string
1695 if len(msg.Params) > 2 {
1696 reason = msg.Params[2]
1697 }
1698
1699 if len(channels) != 1 && len(channels) != len(users) {
1700 return ircError{&irc.Message{
1701 Command: irc.ERR_BADCHANMASK,
1702 Params: []string{dc.nick, channelStr, "Bad channel mask"},
1703 }}
1704 }
1705
1706 for i, user := range users {
1707 var channel string
1708 if len(channels) == 1 {
1709 channel = channels[0]
1710 } else {
1711 channel = channels[i]
1712 }
1713
1714 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
1715 if err != nil {
1716 return err
1717 }
1718
1719 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
1720 if err != nil {
1721 return err
1722 }
1723
1724 if ucChannel != ucUser {
1725 return ircError{&irc.Message{
1726 Command: irc.ERR_USERNOTINCHANNEL,
[400]1727 Params: []string{dc.nick, user, channel, "They are on another network"},
[159]1728 }}
1729 }
1730 uc := ucChannel
1731
1732 params := []string{upstreamChannel, upstreamUser}
1733 if reason != "" {
1734 params = append(params, reason)
1735 }
[301]1736 uc.SendMessageLabeled(dc.id, &irc.Message{
[159]1737 Command: "KICK",
1738 Params: params,
1739 })
1740 }
[69]1741 case "MODE":
[46]1742 var name string
1743 if err := parseMessageParams(msg, &name); err != nil {
1744 return err
1745 }
1746
1747 var modeStr string
1748 if len(msg.Params) > 1 {
1749 modeStr = msg.Params[1]
1750 }
1751
[478]1752 if casemapASCII(name) == dc.nickCM {
[46]1753 if modeStr != "" {
[554]1754 if uc := dc.upstream(); uc != nil {
[301]1755 uc.SendMessageLabeled(dc.id, &irc.Message{
[69]1756 Command: "MODE",
1757 Params: []string{uc.nick, modeStr},
1758 })
[554]1759 } else {
1760 dc.SendMessage(&irc.Message{
1761 Prefix: dc.srv.prefix(),
1762 Command: irc.ERR_UMODEUNKNOWNFLAG,
1763 Params: []string{dc.nick, "Cannot change user mode in multi-upstream mode"},
1764 })
1765 }
[46]1766 } else {
[553]1767 var userMode string
1768 if uc := dc.upstream(); uc != nil {
1769 userMode = string(uc.modes)
1770 }
1771
[55]1772 dc.SendMessage(&irc.Message{
1773 Prefix: dc.srv.prefix(),
[46]1774 Command: irc.RPL_UMODEIS,
[672]1775 Params: []string{dc.nick, "+" + userMode},
[54]1776 })
[46]1777 }
[139]1778 return nil
[46]1779 }
[139]1780
1781 uc, upstreamName, err := dc.unmarshalEntity(name)
1782 if err != nil {
1783 return err
1784 }
1785
1786 if !uc.isChannel(upstreamName) {
1787 return ircError{&irc.Message{
1788 Command: irc.ERR_USERSDONTMATCH,
1789 Params: []string{dc.nick, "Cannot change mode for other users"},
1790 }}
1791 }
1792
1793 if modeStr != "" {
1794 params := []string{upstreamName, modeStr}
1795 params = append(params, msg.Params[2:]...)
[301]1796 uc.SendMessageLabeled(dc.id, &irc.Message{
[139]1797 Command: "MODE",
1798 Params: params,
1799 })
1800 } else {
[478]1801 ch := uc.channels.Value(upstreamName)
1802 if ch == nil {
[139]1803 return ircError{&irc.Message{
1804 Command: irc.ERR_NOSUCHCHANNEL,
1805 Params: []string{dc.nick, name, "No such channel"},
1806 }}
1807 }
1808
1809 if ch.modes == nil {
1810 // we haven't received the initial RPL_CHANNELMODEIS yet
1811 // ignore the request, we will broadcast the modes later when we receive RPL_CHANNELMODEIS
1812 return nil
1813 }
1814
1815 modeStr, modeParams := ch.modes.Format()
1816 params := []string{dc.nick, name, modeStr}
1817 params = append(params, modeParams...)
1818
1819 dc.SendMessage(&irc.Message{
1820 Prefix: dc.srv.prefix(),
1821 Command: irc.RPL_CHANNELMODEIS,
1822 Params: params,
1823 })
[162]1824 if ch.creationTime != "" {
1825 dc.SendMessage(&irc.Message{
1826 Prefix: dc.srv.prefix(),
1827 Command: rpl_creationtime,
1828 Params: []string{dc.nick, name, ch.creationTime},
1829 })
1830 }
[139]1831 }
[160]1832 case "TOPIC":
1833 var channel string
1834 if err := parseMessageParams(msg, &channel); err != nil {
1835 return err
1836 }
1837
[478]1838 uc, upstreamName, err := dc.unmarshalEntity(channel)
[160]1839 if err != nil {
1840 return err
1841 }
1842
1843 if len(msg.Params) > 1 { // setting topic
1844 topic := msg.Params[1]
[301]1845 uc.SendMessageLabeled(dc.id, &irc.Message{
[160]1846 Command: "TOPIC",
[478]1847 Params: []string{upstreamName, topic},
[160]1848 })
1849 } else { // getting topic
[478]1850 ch := uc.channels.Value(upstreamName)
1851 if ch == nil {
[160]1852 return ircError{&irc.Message{
1853 Command: irc.ERR_NOSUCHCHANNEL,
[478]1854 Params: []string{dc.nick, upstreamName, "No such channel"},
[160]1855 }}
1856 }
1857 sendTopic(dc, ch)
1858 }
[177]1859 case "LIST":
[681]1860 network := dc.network
1861 if network == nil && len(msg.Params) > 0 {
1862 var err error
1863 network, msg.Params[0], err = dc.unmarshalEntityNetwork(msg.Params[0])
1864 if err != nil {
1865 return err
[177]1866 }
1867 }
[681]1868 if network == nil {
1869 dc.SendMessage(&irc.Message{
1870 Prefix: dc.srv.prefix(),
1871 Command: irc.RPL_LISTEND,
1872 Params: []string{dc.nick, "LIST without a network suffix is not supported in multi-upstream mode"},
1873 })
1874 return nil
1875 }
[177]1876
[681]1877 uc := network.conn
1878 if uc == nil {
1879 dc.SendMessage(&irc.Message{
1880 Prefix: dc.srv.prefix(),
1881 Command: irc.RPL_LISTEND,
1882 Params: []string{dc.nick, "Disconnected from upstream server"},
1883 })
1884 return nil
1885 }
1886
[682]1887 uc.enqueueCommand(dc, msg)
[140]1888 case "NAMES":
1889 if len(msg.Params) == 0 {
1890 dc.SendMessage(&irc.Message{
1891 Prefix: dc.srv.prefix(),
1892 Command: irc.RPL_ENDOFNAMES,
1893 Params: []string{dc.nick, "*", "End of /NAMES list"},
1894 })
1895 return nil
1896 }
1897
1898 channels := strings.Split(msg.Params[0], ",")
1899 for _, channel := range channels {
[478]1900 uc, upstreamName, err := dc.unmarshalEntity(channel)
[140]1901 if err != nil {
1902 return err
1903 }
1904
[478]1905 ch := uc.channels.Value(upstreamName)
1906 if ch != nil {
[140]1907 sendNames(dc, ch)
1908 } else {
1909 // NAMES on a channel we have not joined, ask upstream
[176]1910 uc.SendMessageLabeled(dc.id, &irc.Message{
[140]1911 Command: "NAMES",
[478]1912 Params: []string{upstreamName},
[140]1913 })
1914 }
1915 }
[660]1916 // For WHOX docs, see:
1917 // - http://faerion.sourceforge.net/doc/irc/whox.var
1918 // - https://github.com/quakenet/snircd/blob/master/doc/readme.who
1919 // Note, many features aren't widely implemented, such as flags and mask2
[127]1920 case "WHO":
1921 if len(msg.Params) == 0 {
1922 // TODO: support WHO without parameters
1923 dc.SendMessage(&irc.Message{
1924 Prefix: dc.srv.prefix(),
1925 Command: irc.RPL_ENDOFWHO,
[140]1926 Params: []string{dc.nick, "*", "End of /WHO list"},
[127]1927 })
1928 return nil
1929 }
1930
[660]1931 // Clients will use the first mask to match RPL_ENDOFWHO
1932 endOfWhoToken := msg.Params[0]
[127]1933
[660]1934 // TODO: add support for WHOX mask2
1935 mask := msg.Params[0]
1936 var options string
1937 if len(msg.Params) > 1 {
1938 options = msg.Params[1]
1939 }
1940
1941 optionsParts := strings.SplitN(options, "%", 2)
1942 // TODO: add support for WHOX flags in optionsParts[0]
1943 var fields, whoxToken string
1944 if len(optionsParts) == 2 {
1945 optionsParts := strings.SplitN(optionsParts[1], ",", 2)
1946 fields = strings.ToLower(optionsParts[0])
1947 if len(optionsParts) == 2 && strings.Contains(fields, "t") {
1948 whoxToken = optionsParts[1]
1949 }
1950 }
1951
1952 // TODO: support mixed bouncer/upstream WHO queries
1953 maskCM := casemapASCII(mask)
1954 if dc.network == nil && maskCM == dc.nickCM {
[142]1955 // TODO: support AWAY (H/G) in self WHO reply
[658]1956 flags := "H"
1957 if dc.user.Admin {
[659]1958 flags += "*"
[658]1959 }
[660]1960 info := whoxInfo{
1961 Token: whoxToken,
1962 Username: dc.user.Username,
1963 Hostname: dc.hostname,
[691]1964 Server: dc.srv.Config().Hostname,
[660]1965 Nickname: dc.nick,
1966 Flags: flags,
[661]1967 Account: dc.user.Username,
[660]1968 Realname: dc.realname,
1969 }
1970 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
[142]1971 dc.SendMessage(&irc.Message{
1972 Prefix: dc.srv.prefix(),
1973 Command: irc.RPL_ENDOFWHO,
[660]1974 Params: []string{dc.nick, endOfWhoToken, "End of /WHO list"},
[142]1975 })
1976 return nil
1977 }
[660]1978 if maskCM == serviceNickCM {
1979 info := whoxInfo{
1980 Token: whoxToken,
1981 Username: servicePrefix.User,
1982 Hostname: servicePrefix.Host,
[691]1983 Server: dc.srv.Config().Hostname,
[660]1984 Nickname: serviceNick,
1985 Flags: "H*",
[661]1986 Account: serviceNick,
[660]1987 Realname: serviceRealname,
1988 }
1989 dc.SendMessage(generateWHOXReply(dc.srv.prefix(), dc.nick, fields, &info))
[343]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"},
[343]1994 })
1995 return nil
1996 }
[142]1997
[660]1998 // TODO: properly support WHO masks
1999 uc, upstreamMask, err := dc.unmarshalEntity(mask)
[127]2000 if err != nil {
2001 return err
2002 }
2003
[660]2004 params := []string{upstreamMask}
2005 if options != "" {
2006 params = append(params, options)
[127]2007 }
2008
[682]2009 uc.enqueueCommand(dc, &irc.Message{
[127]2010 Command: "WHO",
2011 Params: params,
2012 })
[128]2013 case "WHOIS":
2014 if len(msg.Params) == 0 {
2015 return ircError{&irc.Message{
2016 Command: irc.ERR_NONICKNAMEGIVEN,
2017 Params: []string{dc.nick, "No nickname given"},
2018 }}
2019 }
2020
2021 var target, mask string
2022 if len(msg.Params) == 1 {
2023 target = ""
2024 mask = msg.Params[0]
2025 } else {
2026 target = msg.Params[0]
2027 mask = msg.Params[1]
2028 }
2029 // TODO: support multiple WHOIS users
2030 if i := strings.IndexByte(mask, ','); i >= 0 {
2031 mask = mask[:i]
2032 }
2033
[520]2034 if dc.network == nil && casemapASCII(mask) == dc.nickCM {
[142]2035 dc.SendMessage(&irc.Message{
2036 Prefix: dc.srv.prefix(),
2037 Command: irc.RPL_WHOISUSER,
[184]2038 Params: []string{dc.nick, dc.nick, dc.user.Username, dc.hostname, "*", dc.realname},
[142]2039 })
2040 dc.SendMessage(&irc.Message{
2041 Prefix: dc.srv.prefix(),
2042 Command: irc.RPL_WHOISSERVER,
[691]2043 Params: []string{dc.nick, dc.nick, dc.srv.Config().Hostname, "soju"},
[142]2044 })
[658]2045 if dc.user.Admin {
2046 dc.SendMessage(&irc.Message{
2047 Prefix: dc.srv.prefix(),
2048 Command: irc.RPL_WHOISOPERATOR,
2049 Params: []string{dc.nick, dc.nick, "is a bouncer administrator"},
2050 })
2051 }
[142]2052 dc.SendMessage(&irc.Message{
2053 Prefix: dc.srv.prefix(),
[661]2054 Command: rpl_whoisaccount,
2055 Params: []string{dc.nick, dc.nick, dc.user.Username, "is logged in as"},
2056 })
2057 dc.SendMessage(&irc.Message{
2058 Prefix: dc.srv.prefix(),
[142]2059 Command: irc.RPL_ENDOFWHOIS,
2060 Params: []string{dc.nick, dc.nick, "End of /WHOIS list"},
2061 })
2062 return nil
2063 }
[609]2064 if casemapASCII(mask) == serviceNickCM {
2065 dc.SendMessage(&irc.Message{
2066 Prefix: dc.srv.prefix(),
2067 Command: irc.RPL_WHOISUSER,
2068 Params: []string{dc.nick, serviceNick, servicePrefix.User, servicePrefix.Host, "*", serviceRealname},
2069 })
2070 dc.SendMessage(&irc.Message{
2071 Prefix: dc.srv.prefix(),
2072 Command: irc.RPL_WHOISSERVER,
[691]2073 Params: []string{dc.nick, serviceNick, dc.srv.Config().Hostname, "soju"},
[609]2074 })
2075 dc.SendMessage(&irc.Message{
2076 Prefix: dc.srv.prefix(),
[657]2077 Command: irc.RPL_WHOISOPERATOR,
2078 Params: []string{dc.nick, serviceNick, "is the bouncer service"},
2079 })
2080 dc.SendMessage(&irc.Message{
2081 Prefix: dc.srv.prefix(),
[661]2082 Command: rpl_whoisaccount,
2083 Params: []string{dc.nick, serviceNick, serviceNick, "is logged in as"},
2084 })
2085 dc.SendMessage(&irc.Message{
2086 Prefix: dc.srv.prefix(),
[609]2087 Command: irc.RPL_ENDOFWHOIS,
2088 Params: []string{dc.nick, serviceNick, "End of /WHOIS list"},
2089 })
2090 return nil
2091 }
[142]2092
[128]2093 // TODO: support WHOIS masks
2094 uc, upstreamNick, err := dc.unmarshalEntity(mask)
2095 if err != nil {
2096 return err
2097 }
2098
2099 var params []string
2100 if target != "" {
[299]2101 if target == mask { // WHOIS nick nick
2102 params = []string{upstreamNick, upstreamNick}
2103 } else {
2104 params = []string{target, upstreamNick}
2105 }
[128]2106 } else {
2107 params = []string{upstreamNick}
2108 }
2109
[176]2110 uc.SendMessageLabeled(dc.id, &irc.Message{
[128]2111 Command: "WHOIS",
2112 Params: params,
2113 })
[562]2114 case "PRIVMSG", "NOTICE":
[58]2115 var targetsStr, text string
2116 if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
2117 return err
2118 }
[303]2119 tags := copyClientTags(msg.Tags)
[58]2120
2121 for _, name := range strings.Split(targetsStr, ",") {
[691]2122 if name == "$"+dc.srv.Config().Hostname || (name == "$*" && dc.network == nil) {
[563]2123 // "$" means a server mask follows. If it's the bouncer's
2124 // hostname, broadcast the message to all bouncer users.
2125 if !dc.user.Admin {
2126 return ircError{&irc.Message{
2127 Prefix: dc.srv.prefix(),
2128 Command: irc.ERR_BADMASK,
2129 Params: []string{dc.nick, name, "Permission denied to broadcast message to all bouncer users"},
2130 }}
2131 }
2132
2133 dc.logger.Printf("broadcasting bouncer-wide %v: %v", msg.Command, text)
2134
2135 broadcastTags := tags.Copy()
2136 broadcastTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2137 broadcastMsg := &irc.Message{
2138 Tags: broadcastTags,
2139 Prefix: servicePrefix,
2140 Command: msg.Command,
2141 Params: []string{name, text},
2142 }
2143 dc.srv.forEachUser(func(u *user) {
2144 u.events <- eventBroadcast{broadcastMsg}
2145 })
2146 continue
2147 }
2148
[529]2149 if dc.network == nil && casemapASCII(name) == dc.nickCM {
[618]2150 dc.SendMessage(&irc.Message{
2151 Tags: msg.Tags.Copy(),
2152 Prefix: dc.prefix(),
2153 Command: msg.Command,
2154 Params: []string{name, text},
2155 })
[529]2156 continue
2157 }
2158
[562]2159 if msg.Command == "PRIVMSG" && casemapASCII(name) == serviceNickCM {
[431]2160 if dc.caps["echo-message"] {
2161 echoTags := tags.Copy()
2162 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
2163 dc.SendMessage(&irc.Message{
2164 Tags: echoTags,
2165 Prefix: dc.prefix(),
[562]2166 Command: msg.Command,
[431]2167 Params: []string{name, text},
2168 })
2169 }
[677]2170 handleServicePRIVMSG(ctx, dc, text)
[117]2171 continue
2172 }
2173
[127]2174 uc, upstreamName, err := dc.unmarshalEntity(name)
[58]2175 if err != nil {
2176 return err
2177 }
2178
[562]2179 if msg.Command == "PRIVMSG" && uc.network.casemap(upstreamName) == "nickserv" {
[675]2180 dc.handleNickServPRIVMSG(ctx, uc, text)
[95]2181 }
2182
[268]2183 unmarshaledText := text
2184 if uc.isChannel(upstreamName) {
2185 unmarshaledText = dc.unmarshalText(uc, text)
2186 }
[301]2187 uc.SendMessageLabeled(dc.id, &irc.Message{
[303]2188 Tags: tags,
[562]2189 Command: msg.Command,
[268]2190 Params: []string{upstreamName, unmarshaledText},
[60]2191 })
[105]2192
[303]2193 echoTags := tags.Copy()
2194 echoTags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
[559]2195 if uc.account != "" {
2196 echoTags["account"] = irc.TagValue(uc.account)
2197 }
[113]2198 echoMsg := &irc.Message{
[690]2199 Tags: echoTags,
2200 Prefix: &irc.Prefix{Name: uc.nick},
[562]2201 Command: msg.Command,
[113]2202 Params: []string{upstreamName, text},
2203 }
[239]2204 uc.produce(upstreamName, echoMsg, dc)
[435]2205
2206 uc.updateChannelAutoDetach(upstreamName)
[58]2207 }
[303]2208 case "TAGMSG":
2209 var targetsStr string
2210 if err := parseMessageParams(msg, &targetsStr); err != nil {
2211 return err
2212 }
2213 tags := copyClientTags(msg.Tags)
2214
2215 for _, name := range strings.Split(targetsStr, ",") {
[617]2216 if dc.network == nil && casemapASCII(name) == dc.nickCM {
2217 dc.SendMessage(&irc.Message{
2218 Tags: msg.Tags.Copy(),
2219 Prefix: dc.prefix(),
2220 Command: "TAGMSG",
2221 Params: []string{name},
2222 })
2223 continue
2224 }
2225
[616]2226 if casemapASCII(name) == serviceNickCM {
2227 continue
2228 }
2229
[303]2230 uc, upstreamName, err := dc.unmarshalEntity(name)
2231 if err != nil {
2232 return err
2233 }
[427]2234 if _, ok := uc.caps["message-tags"]; !ok {
2235 continue
2236 }
[303]2237
2238 uc.SendMessageLabeled(dc.id, &irc.Message{
2239 Tags: tags,
2240 Command: "TAGMSG",
2241 Params: []string{upstreamName},
2242 })
[435]2243
2244 uc.updateChannelAutoDetach(upstreamName)
[303]2245 }
[163]2246 case "INVITE":
2247 var user, channel string
2248 if err := parseMessageParams(msg, &user, &channel); err != nil {
2249 return err
2250 }
2251
2252 ucChannel, upstreamChannel, err := dc.unmarshalEntity(channel)
2253 if err != nil {
2254 return err
2255 }
2256
2257 ucUser, upstreamUser, err := dc.unmarshalEntity(user)
2258 if err != nil {
2259 return err
2260 }
2261
2262 if ucChannel != ucUser {
2263 return ircError{&irc.Message{
2264 Command: irc.ERR_USERNOTINCHANNEL,
[401]2265 Params: []string{dc.nick, user, channel, "They are on another network"},
[163]2266 }}
2267 }
2268 uc := ucChannel
2269
[176]2270 uc.SendMessageLabeled(dc.id, &irc.Message{
[163]2271 Command: "INVITE",
2272 Params: []string{upstreamUser, upstreamChannel},
2273 })
[684]2274 case "MONITOR":
2275 // MONITOR is unsupported in multi-upstream mode
2276 uc := dc.upstream()
2277 if uc == nil {
2278 return newUnknownCommandError(msg.Command)
2279 }
2280
2281 var subcommand string
2282 if err := parseMessageParams(msg, &subcommand); err != nil {
2283 return err
2284 }
2285
2286 switch strings.ToUpper(subcommand) {
2287 case "+", "-":
2288 var targets string
2289 if err := parseMessageParams(msg, nil, &targets); err != nil {
2290 return err
2291 }
2292 for _, target := range strings.Split(targets, ",") {
2293 if subcommand == "+" {
2294 // Hard limit, just to avoid having downstreams fill our map
2295 if len(dc.monitored.innerMap) >= 1000 {
2296 dc.SendMessage(&irc.Message{
2297 Prefix: dc.srv.prefix(),
2298 Command: irc.ERR_MONLISTFULL,
2299 Params: []string{dc.nick, "1000", target, "Bouncer monitor list is full"},
2300 })
2301 continue
2302 }
2303
2304 dc.monitored.SetValue(target, nil)
2305
2306 if uc.monitored.Has(target) {
2307 cmd := irc.RPL_MONOFFLINE
2308 if online := uc.monitored.Value(target); online {
2309 cmd = irc.RPL_MONONLINE
2310 }
2311
2312 dc.SendMessage(&irc.Message{
2313 Prefix: dc.srv.prefix(),
2314 Command: cmd,
2315 Params: []string{dc.nick, target},
2316 })
2317 }
2318 } else {
2319 dc.monitored.Delete(target)
2320 }
2321 }
2322 uc.updateMonitor()
2323 case "C": // clear
2324 dc.monitored = newCasemapMap(0)
2325 uc.updateMonitor()
2326 case "L": // list
2327 // TODO: be less lazy and pack the list
2328 for _, entry := range dc.monitored.innerMap {
2329 dc.SendMessage(&irc.Message{
2330 Prefix: dc.srv.prefix(),
2331 Command: irc.RPL_MONLIST,
2332 Params: []string{dc.nick, entry.originalKey},
2333 })
2334 }
2335 dc.SendMessage(&irc.Message{
2336 Prefix: dc.srv.prefix(),
2337 Command: irc.RPL_ENDOFMONLIST,
2338 Params: []string{dc.nick, "End of MONITOR list"},
2339 })
2340 case "S": // status
2341 // TODO: be less lazy and pack the lists
2342 for _, entry := range dc.monitored.innerMap {
2343 target := entry.originalKey
2344
2345 cmd := irc.RPL_MONOFFLINE
2346 if online := uc.monitored.Value(target); online {
2347 cmd = irc.RPL_MONONLINE
2348 }
2349
2350 dc.SendMessage(&irc.Message{
2351 Prefix: dc.srv.prefix(),
2352 Command: cmd,
2353 Params: []string{dc.nick, target},
2354 })
2355 }
2356 }
[319]2357 case "CHATHISTORY":
2358 var subcommand string
2359 if err := parseMessageParams(msg, &subcommand); err != nil {
2360 return err
2361 }
[516]2362 var target, limitStr string
2363 var boundsStr [2]string
2364 switch subcommand {
2365 case "AFTER", "BEFORE":
2366 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &limitStr); err != nil {
2367 return err
2368 }
2369 case "BETWEEN":
2370 if err := parseMessageParams(msg, nil, &target, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2371 return err
2372 }
[549]2373 case "TARGETS":
[688]2374 if dc.network == nil {
2375 // Either an unbound bouncer network, in which case we should return no targets,
2376 // or a multi-upstream downstream, but we don't support CHATHISTORY TARGETS for those yet.
2377 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {})
2378 return nil
2379 }
[549]2380 if err := parseMessageParams(msg, nil, &boundsStr[0], &boundsStr[1], &limitStr); err != nil {
2381 return err
2382 }
[516]2383 default:
2384 // TODO: support LATEST, AROUND
[319]2385 return ircError{&irc.Message{
2386 Command: "FAIL",
[516]2387 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, "Unknown command"},
[319]2388 }}
2389 }
2390
[586]2391 // We don't save history for our service
2392 if casemapASCII(target) == serviceNickCM {
2393 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {})
2394 return nil
2395 }
2396
[441]2397 store, ok := dc.user.msgStore.(chatHistoryMessageStore)
2398 if !ok {
[319]2399 return ircError{&irc.Message{
2400 Command: irc.ERR_UNKNOWNCOMMAND,
[456]2401 Params: []string{dc.nick, "CHATHISTORY", "Unknown command"},
[319]2402 }}
2403 }
2404
[585]2405 network, entity, err := dc.unmarshalEntityNetwork(target)
[319]2406 if err != nil {
2407 return err
2408 }
[585]2409 entity = network.casemap(entity)
[319]2410
2411 // TODO: support msgid criteria
[516]2412 var bounds [2]time.Time
2413 bounds[0] = parseChatHistoryBound(boundsStr[0])
2414 if bounds[0].IsZero() {
[319]2415 return ircError{&irc.Message{
2416 Command: "FAIL",
[516]2417 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[0], "Invalid first bound"},
[319]2418 }}
2419 }
2420
[516]2421 if boundsStr[1] != "" {
2422 bounds[1] = parseChatHistoryBound(boundsStr[1])
2423 if bounds[1].IsZero() {
2424 return ircError{&irc.Message{
2425 Command: "FAIL",
2426 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, boundsStr[1], "Invalid second bound"},
2427 }}
2428 }
[319]2429 }
2430
2431 limit, err := strconv.Atoi(limitStr)
[670]2432 if err != nil || limit < 0 || limit > chatHistoryLimit {
[319]2433 return ircError{&irc.Message{
2434 Command: "FAIL",
[456]2435 Params: []string{"CHATHISTORY", "INVALID_PARAMS", subcommand, limitStr, "Invalid limit"},
[319]2436 }}
2437 }
2438
[665]2439 eventPlayback := dc.caps["draft/event-playback"]
2440
[387]2441 var history []*irc.Message
[319]2442 switch subcommand {
2443 case "BEFORE":
[667]2444 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], time.Time{}, limit, eventPlayback)
[360]2445 case "AFTER":
[667]2446 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], time.Now(), limit, eventPlayback)
[516]2447 case "BETWEEN":
2448 if bounds[0].Before(bounds[1]) {
[667]2449 history, err = store.LoadAfterTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
[516]2450 } else {
[667]2451 history, err = store.LoadBeforeTime(ctx, &network.Network, entity, bounds[0], bounds[1], limit, eventPlayback)
[516]2452 }
[549]2453 case "TARGETS":
2454 // TODO: support TARGETS in multi-upstream mode
[667]2455 targets, err := store.ListTargets(ctx, &network.Network, bounds[0], bounds[1], limit, eventPlayback)
[549]2456 if err != nil {
[627]2457 dc.logger.Printf("failed fetching targets for chathistory: %v", err)
[549]2458 return ircError{&irc.Message{
2459 Command: "FAIL",
2460 Params: []string{"CHATHISTORY", "MESSAGE_ERROR", subcommand, "Failed to retrieve targets"},
2461 }}
2462 }
2463
[551]2464 dc.SendBatch("draft/chathistory-targets", nil, nil, func(batchRef irc.TagValue) {
2465 for _, target := range targets {
[585]2466 if ch := network.channels.Value(target.Name); ch != nil && ch.Detached {
[551]2467 continue
2468 }
[549]2469
[551]2470 dc.SendMessage(&irc.Message{
2471 Tags: irc.Tags{"batch": batchRef},
2472 Prefix: dc.srv.prefix(),
2473 Command: "CHATHISTORY",
2474 Params: []string{"TARGETS", target.Name, target.LatestMessage.UTC().Format(serverTimeLayout)},
2475 })
[550]2476 }
[549]2477 })
2478
2479 return nil
[319]2480 }
[387]2481 if err != nil {
[515]2482 dc.logger.Printf("failed fetching %q messages for chathistory: %v", target, err)
[387]2483 return newChatHistoryError(subcommand, target)
2484 }
2485
[551]2486 dc.SendBatch("chathistory", []string{target}, nil, func(batchRef irc.TagValue) {
2487 for _, msg := range history {
2488 msg.Tags["batch"] = batchRef
[585]2489 dc.SendMessage(dc.marshalMessage(msg, network))
[551]2490 }
[387]2491 })
[532]2492 case "BOUNCER":
2493 var subcommand string
2494 if err := parseMessageParams(msg, &subcommand); err != nil {
2495 return err
2496 }
2497
2498 switch strings.ToUpper(subcommand) {
[646]2499 case "BIND":
2500 return ircError{&irc.Message{
2501 Command: "FAIL",
2502 Params: []string{"BOUNCER", "REGISTRATION_IS_COMPLETED", "BIND", "Cannot bind to a network after registration"},
2503 }}
[532]2504 case "LISTNETWORKS":
[551]2505 dc.SendBatch("soju.im/bouncer-networks", nil, nil, func(batchRef irc.TagValue) {
2506 dc.user.forEachNetwork(func(network *network) {
2507 idStr := fmt.Sprintf("%v", network.ID)
2508 attrs := getNetworkAttrs(network)
2509 dc.SendMessage(&irc.Message{
2510 Tags: irc.Tags{"batch": batchRef},
2511 Prefix: dc.srv.prefix(),
2512 Command: "BOUNCER",
2513 Params: []string{"NETWORK", idStr, attrs.String()},
2514 })
[532]2515 })
2516 })
2517 case "ADDNETWORK":
2518 var attrsStr string
2519 if err := parseMessageParams(msg, nil, &attrsStr); err != nil {
2520 return err
2521 }
2522 attrs := irc.ParseTags(attrsStr)
2523
[654]2524 record := &Network{Nick: dc.nick, Enabled: true}
2525 if err := updateNetworkAttrs(record, attrs, subcommand); err != nil {
2526 return err
[532]2527 }
2528
[664]2529 if record.Nick == dc.user.Username {
2530 record.Nick = ""
2531 }
[654]2532 if record.Realname == dc.user.Realname {
2533 record.Realname = ""
[532]2534 }
2535
[676]2536 network, err := dc.user.createNetwork(ctx, record)
[532]2537 if err != nil {
2538 return ircError{&irc.Message{
2539 Command: "FAIL",
2540 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to create network: %v", err)},
2541 }}
2542 }
2543
2544 dc.SendMessage(&irc.Message{
2545 Prefix: dc.srv.prefix(),
2546 Command: "BOUNCER",
2547 Params: []string{"ADDNETWORK", fmt.Sprintf("%v", network.ID)},
2548 })
2549 case "CHANGENETWORK":
2550 var idStr, attrsStr string
2551 if err := parseMessageParams(msg, nil, &idStr, &attrsStr); err != nil {
2552 return err
2553 }
[535]2554 id, err := parseBouncerNetID(subcommand, idStr)
[532]2555 if err != nil {
2556 return err
2557 }
2558 attrs := irc.ParseTags(attrsStr)
2559
2560 net := dc.user.getNetworkByID(id)
2561 if net == nil {
2562 return ircError{&irc.Message{
2563 Command: "FAIL",
[535]2564 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
[532]2565 }}
2566 }
2567
2568 record := net.Network // copy network record because we'll mutate it
[654]2569 if err := updateNetworkAttrs(&record, attrs, subcommand); err != nil {
2570 return err
[532]2571 }
2572
[664]2573 if record.Nick == dc.user.Username {
2574 record.Nick = ""
2575 }
[654]2576 if record.Realname == dc.user.Realname {
2577 record.Realname = ""
2578 }
2579
[676]2580 _, err = dc.user.updateNetwork(ctx, &record)
[532]2581 if err != nil {
2582 return ircError{&irc.Message{
2583 Command: "FAIL",
2584 Params: []string{"BOUNCER", "UNKNOWN_ERROR", subcommand, fmt.Sprintf("Failed to update network: %v", err)},
2585 }}
2586 }
2587
2588 dc.SendMessage(&irc.Message{
2589 Prefix: dc.srv.prefix(),
2590 Command: "BOUNCER",
2591 Params: []string{"CHANGENETWORK", idStr},
2592 })
2593 case "DELNETWORK":
2594 var idStr string
2595 if err := parseMessageParams(msg, nil, &idStr); err != nil {
2596 return err
2597 }
[535]2598 id, err := parseBouncerNetID(subcommand, idStr)
[532]2599 if err != nil {
2600 return err
2601 }
2602
2603 net := dc.user.getNetworkByID(id)
2604 if net == nil {
2605 return ircError{&irc.Message{
2606 Command: "FAIL",
[535]2607 Params: []string{"BOUNCER", "INVALID_NETID", subcommand, idStr, "Invalid network ID"},
[532]2608 }}
2609 }
2610
[676]2611 if err := dc.user.deleteNetwork(ctx, net.ID); err != nil {
[532]2612 return err
2613 }
2614
2615 dc.SendMessage(&irc.Message{
2616 Prefix: dc.srv.prefix(),
2617 Command: "BOUNCER",
2618 Params: []string{"DELNETWORK", idStr},
2619 })
2620 default:
2621 return ircError{&irc.Message{
2622 Command: "FAIL",
2623 Params: []string{"BOUNCER", "UNKNOWN_COMMAND", subcommand, "Unknown subcommand"},
2624 }}
2625 }
[13]2626 default:
[55]2627 dc.logger.Printf("unhandled message: %v", msg)
[547]2628
2629 // Only forward unknown commands in single-upstream mode
2630 uc := dc.upstream()
2631 if uc == nil {
2632 return newUnknownCommandError(msg.Command)
2633 }
2634
2635 uc.SendMessageLabeled(dc.id, msg)
[13]2636 }
[42]2637 return nil
[13]2638}
[95]2639
[675]2640func (dc *downstreamConn) handleNickServPRIVMSG(ctx context.Context, uc *upstreamConn, text string) {
[95]2641 username, password, ok := parseNickServCredentials(text, uc.nick)
2642 if !ok {
2643 return
2644 }
2645
[307]2646 // User may have e.g. EXTERNAL mechanism configured. We do not want to
2647 // automatically erase the key pair or any other credentials.
2648 if uc.network.SASL.Mechanism != "" && uc.network.SASL.Mechanism != "PLAIN" {
2649 return
2650 }
2651
[95]2652 dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
2653 n := uc.network
2654 n.SASL.Mechanism = "PLAIN"
2655 n.SASL.Plain.Username = username
2656 n.SASL.Plain.Password = password
[675]2657 if err := dc.srv.db.StoreNetwork(ctx, dc.user.ID, &n.Network); err != nil {
[95]2658 dc.logger.Printf("failed to save NickServ credentials: %v", err)
2659 }
2660}
2661
2662func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
2663 fields := strings.Fields(text)
2664 if len(fields) < 2 {
2665 return "", "", false
2666 }
2667 cmd := strings.ToUpper(fields[0])
2668 params := fields[1:]
2669 switch cmd {
2670 case "REGISTER":
2671 username = nick
2672 password = params[0]
2673 case "IDENTIFY":
2674 if len(params) == 1 {
2675 username = nick
[182]2676 password = params[0]
[95]2677 } else {
2678 username = params[0]
[182]2679 password = params[1]
[95]2680 }
[182]2681 case "SET":
2682 if len(params) == 2 && strings.EqualFold(params[0], "PASSWORD") {
2683 username = nick
2684 password = params[1]
2685 }
[340]2686 default:
2687 return "", "", false
[95]2688 }
2689 return username, password, true
2690}
Note: See TracBrowser for help on using the repository browser.