source: code/trunk/upstream.go@ 82

Last change on this file since 82 was 82, checked in by contact, 5 years ago

Pass-through NICK messages for other users
File size: 9.9 KB
RevLine 
[13]1package jounce
2
3import (
4 "crypto/tls"
5 "fmt"
6 "io"
7 "net"
[19]8 "strconv"
[17]9 "strings"
[19]10 "time"
[13]11
12 "gopkg.in/irc.v3"
13)
14
[19]15type upstreamChannel struct {
16 Name string
[46]17 conn *upstreamConn
[19]18 Topic string
19 TopicWho string
20 TopicTime time.Time
21 Status channelStatus
[35]22 modes modeSet
[19]23 Members map[string]membership
[25]24 complete bool
[19]25}
26
[13]27type upstreamConn struct {
[77]28 network *network
[21]29 logger Logger
[19]30 net net.Conn
31 irc *irc.Conn
32 srv *Server
[37]33 user *user
[33]34 messages chan<- *irc.Message
[50]35 ring *Ring
[16]36
37 serverName string
38 availableUserModes string
39 availableChannelModes string
40 channelModesWithParam string
[19]41
42 registered bool
[42]43 nick string
[77]44 username string
45 realname string
[33]46 closed bool
[19]47 modes modeSet
48 channels map[string]*upstreamChannel
[57]49 history map[string]uint64
[13]50}
51
[77]52func connectToUpstream(network *network) (*upstreamConn, error) {
53 logger := &prefixLogger{network.user.srv.Logger, fmt.Sprintf("upstream %q: ", network.Addr)}
[33]54
[77]55 addr := network.Addr
56 if !strings.ContainsRune(addr, ':') {
57 addr = addr + ":6697"
58 }
59
60 logger.Printf("connecting to TLS server at address %q", addr)
61 netConn, err := tls.Dial("tcp", addr, nil)
[33]62 if err != nil {
[77]63 return nil, fmt.Errorf("failed to dial %q: %v", addr, err)
[33]64 }
65
[67]66 setKeepAlive(netConn)
67
[33]68 msgs := make(chan *irc.Message, 64)
[55]69 uc := &upstreamConn{
[79]70 network: network,
[33]71 logger: logger,
72 net: netConn,
73 irc: irc.NewConn(netConn),
[77]74 srv: network.user.srv,
75 user: network.user,
[33]76 messages: msgs,
[77]77 ring: NewRing(network.user.srv.RingCap),
[33]78 channels: make(map[string]*upstreamChannel),
[57]79 history: make(map[string]uint64),
[33]80 }
81
82 go func() {
83 for msg := range msgs {
[64]84 if uc.srv.Debug {
85 uc.logger.Printf("sent: %v", msg)
86 }
[55]87 if err := uc.irc.WriteMessage(msg); err != nil {
88 uc.logger.Printf("failed to write message: %v", err)
[33]89 }
90 }
[55]91 if err := uc.net.Close(); err != nil {
92 uc.logger.Printf("failed to close connection: %v", err)
[45]93 } else {
[55]94 uc.logger.Printf("connection closed")
[45]95 }
[33]96 }()
97
[55]98 return uc, nil
[33]99}
100
[55]101func (uc *upstreamConn) Close() error {
102 if uc.closed {
[33]103 return fmt.Errorf("upstream connection already closed")
104 }
[55]105 close(uc.messages)
106 uc.closed = true
[33]107 return nil
108}
109
[73]110func (uc *upstreamConn) forEachDownstream(f func(*downstreamConn)) {
111 uc.user.forEachDownstream(func(dc *downstreamConn) {
[77]112 if dc.network != nil && dc.network != uc.network {
[73]113 return
114 }
115 f(dc)
116 })
117}
118
[55]119func (uc *upstreamConn) getChannel(name string) (*upstreamChannel, error) {
120 ch, ok := uc.channels[name]
[19]121 if !ok {
122 return nil, fmt.Errorf("unknown channel %q", name)
123 }
124 return ch, nil
125}
126
[55]127func (uc *upstreamConn) handleMessage(msg *irc.Message) error {
[13]128 switch msg.Command {
129 case "PING":
[60]130 uc.SendMessage(&irc.Message{
[13]131 Command: "PONG",
[68]132 Params: msg.Params,
[60]133 })
[33]134 return nil
[17]135 case "MODE":
[69]136 if msg.Prefix == nil {
137 return fmt.Errorf("missing prefix")
138 }
139
[43]140 var name, modeStr string
141 if err := parseMessageParams(msg, &name, &modeStr); err != nil {
142 return err
[17]143 }
[35]144
145 if name == msg.Prefix.Name { // user mode change
[55]146 if name != uc.nick {
[35]147 return fmt.Errorf("received MODE message for unknow nick %q", name)
148 }
[55]149 return uc.modes.Apply(modeStr)
[35]150 } else { // channel mode change
[55]151 ch, err := uc.getChannel(name)
[35]152 if err != nil {
153 return err
154 }
155 if err := ch.modes.Apply(modeStr); err != nil {
156 return err
157 }
[69]158
[73]159 uc.forEachDownstream(func(dc *downstreamConn) {
[69]160 dc.SendMessage(&irc.Message{
161 Prefix: dc.marshalUserPrefix(uc, msg.Prefix),
162 Command: "MODE",
163 Params: []string{dc.marshalChannel(uc, name), modeStr},
164 })
165 })
[46]166 }
[18]167 case "NOTICE":
[55]168 uc.logger.Print(msg)
[14]169 case irc.RPL_WELCOME:
[55]170 uc.registered = true
171 uc.logger.Printf("connection registered")
[19]172
[77]173 channels, err := uc.srv.db.ListChannels(uc.network.ID)
174 if err != nil {
175 uc.logger.Printf("failed to list channels from database: %v", err)
176 break
177 }
178
179 for _, ch := range channels {
[60]180 uc.SendMessage(&irc.Message{
[19]181 Command: "JOIN",
[77]182 Params: []string{ch.Name},
[60]183 })
[19]184 }
[16]185 case irc.RPL_MYINFO:
[55]186 if err := parseMessageParams(msg, nil, &uc.serverName, nil, &uc.availableUserModes, &uc.availableChannelModes); err != nil {
[43]187 return err
[16]188 }
189 if len(msg.Params) > 5 {
[55]190 uc.channelModesWithParam = msg.Params[5]
[16]191 }
[42]192 case "NICK":
[43]193 var newNick string
194 if err := parseMessageParams(msg, &newNick); err != nil {
195 return err
[42]196 }
197
[55]198 if msg.Prefix.Name == uc.nick {
199 uc.logger.Printf("changed nick from %q to %q", uc.nick, newNick)
200 uc.nick = newNick
[42]201 }
202
[55]203 for _, ch := range uc.channels {
[42]204 if membership, ok := ch.Members[msg.Prefix.Name]; ok {
205 delete(ch.Members, msg.Prefix.Name)
206 ch.Members[newNick] = membership
207 }
208 }
[82]209
210 if msg.Prefix.Name != uc.nick {
211 uc.forEachDownstream(func(dc *downstreamConn) {
212 dc.SendMessage(&irc.Message{
213 Prefix: dc.marshalUserPrefix(uc, msg.Prefix),
214 Command: "NICK",
215 Params: []string{newNick},
216 })
217 })
218 }
[69]219 case "JOIN":
220 if msg.Prefix == nil {
221 return fmt.Errorf("expected a prefix")
222 }
[42]223
[43]224 var channels string
225 if err := parseMessageParams(msg, &channels); err != nil {
226 return err
[19]227 }
[34]228
[43]229 for _, ch := range strings.Split(channels, ",") {
[55]230 if msg.Prefix.Name == uc.nick {
231 uc.logger.Printf("joined channel %q", ch)
232 uc.channels[ch] = &upstreamChannel{
[34]233 Name: ch,
[55]234 conn: uc,
[34]235 Members: make(map[string]membership),
236 }
237 } else {
[55]238 ch, err := uc.getChannel(ch)
[34]239 if err != nil {
240 return err
241 }
242 ch.Members[msg.Prefix.Name] = 0
[19]243 }
[69]244
[73]245 uc.forEachDownstream(func(dc *downstreamConn) {
[69]246 dc.SendMessage(&irc.Message{
247 Prefix: dc.marshalUserPrefix(uc, msg.Prefix),
248 Command: "JOIN",
249 Params: []string{dc.marshalChannel(uc, ch)},
250 })
251 })
[19]252 }
[69]253 case "PART":
254 if msg.Prefix == nil {
255 return fmt.Errorf("expected a prefix")
256 }
[34]257
[43]258 var channels string
259 if err := parseMessageParams(msg, &channels); err != nil {
260 return err
[34]261 }
262
[43]263 for _, ch := range strings.Split(channels, ",") {
[55]264 if msg.Prefix.Name == uc.nick {
265 uc.logger.Printf("parted channel %q", ch)
266 delete(uc.channels, ch)
[34]267 } else {
[55]268 ch, err := uc.getChannel(ch)
[34]269 if err != nil {
270 return err
271 }
272 delete(ch.Members, msg.Prefix.Name)
273 }
[69]274
[73]275 uc.forEachDownstream(func(dc *downstreamConn) {
[69]276 dc.SendMessage(&irc.Message{
277 Prefix: dc.marshalUserPrefix(uc, msg.Prefix),
278 Command: "PART",
279 Params: []string{dc.marshalChannel(uc, ch)},
280 })
281 })
[34]282 }
[19]283 case irc.RPL_TOPIC, irc.RPL_NOTOPIC:
[43]284 var name, topic string
285 if err := parseMessageParams(msg, nil, &name, &topic); err != nil {
286 return err
[19]287 }
[55]288 ch, err := uc.getChannel(name)
[19]289 if err != nil {
290 return err
291 }
292 if msg.Command == irc.RPL_TOPIC {
[43]293 ch.Topic = topic
[19]294 } else {
295 ch.Topic = ""
296 }
297 case "TOPIC":
[43]298 var name string
[74]299 if err := parseMessageParams(msg, &name); err != nil {
[43]300 return err
[19]301 }
[55]302 ch, err := uc.getChannel(name)
[19]303 if err != nil {
304 return err
305 }
306 if len(msg.Params) > 1 {
307 ch.Topic = msg.Params[1]
308 } else {
309 ch.Topic = ""
310 }
[74]311 uc.forEachDownstream(func(dc *downstreamConn) {
312 params := []string{dc.marshalChannel(uc, name)}
313 if ch.Topic != "" {
314 params = append(params, ch.Topic)
315 }
316 dc.SendMessage(&irc.Message{
317 Prefix: dc.marshalUserPrefix(uc, msg.Prefix),
318 Command: "TOPIC",
319 Params: params,
320 })
321 })
[19]322 case rpl_topicwhotime:
[43]323 var name, who, timeStr string
324 if err := parseMessageParams(msg, nil, &name, &who, &timeStr); err != nil {
325 return err
[19]326 }
[55]327 ch, err := uc.getChannel(name)
[19]328 if err != nil {
329 return err
330 }
[43]331 ch.TopicWho = who
332 sec, err := strconv.ParseInt(timeStr, 10, 64)
[19]333 if err != nil {
334 return fmt.Errorf("failed to parse topic time: %v", err)
335 }
336 ch.TopicTime = time.Unix(sec, 0)
337 case irc.RPL_NAMREPLY:
[43]338 var name, statusStr, members string
339 if err := parseMessageParams(msg, nil, &statusStr, &name, &members); err != nil {
340 return err
[19]341 }
[55]342 ch, err := uc.getChannel(name)
[19]343 if err != nil {
344 return err
345 }
346
[43]347 status, err := parseChannelStatus(statusStr)
[19]348 if err != nil {
349 return err
350 }
351 ch.Status = status
352
[43]353 for _, s := range strings.Split(members, " ") {
[19]354 membership, nick := parseMembershipPrefix(s)
355 ch.Members[nick] = membership
356 }
357 case irc.RPL_ENDOFNAMES:
[43]358 var name string
359 if err := parseMessageParams(msg, nil, &name); err != nil {
360 return err
[25]361 }
[55]362 ch, err := uc.getChannel(name)
[25]363 if err != nil {
364 return err
365 }
366
[34]367 if ch.complete {
368 return fmt.Errorf("received unexpected RPL_ENDOFNAMES")
369 }
[25]370 ch.complete = true
[27]371
[73]372 uc.forEachDownstream(func(dc *downstreamConn) {
[27]373 forwardChannel(dc, ch)
[40]374 })
[36]375 case "PRIVMSG":
[69]376 if err := parseMessageParams(msg, nil, nil); err != nil {
377 return err
378 }
[55]379 uc.ring.Produce(msg)
[16]380 case irc.RPL_YOURHOST, irc.RPL_CREATED:
[14]381 // Ignore
382 case irc.RPL_LUSERCLIENT, irc.RPL_LUSEROP, irc.RPL_LUSERUNKNOWN, irc.RPL_LUSERCHANNELS, irc.RPL_LUSERME:
383 // Ignore
384 case irc.RPL_MOTDSTART, irc.RPL_MOTD, irc.RPL_ENDOFMOTD:
385 // Ignore
386 case rpl_localusers, rpl_globalusers:
387 // Ignore
388 case irc.RPL_STATSVLINE, irc.RPL_STATSPING, irc.RPL_STATSBLINE, irc.RPL_STATSDLINE:
389 // Ignore
[13]390 default:
[55]391 uc.logger.Printf("unhandled upstream message: %v", msg)
[13]392 }
[14]393 return nil
[13]394}
395
[55]396func (uc *upstreamConn) register() {
[77]397 uc.nick = uc.network.Nick
398 uc.username = uc.network.Username
399 if uc.username == "" {
400 uc.username = uc.nick
401 }
402 uc.realname = uc.network.Realname
403 if uc.realname == "" {
404 uc.realname = uc.nick
405 }
406
[60]407 uc.SendMessage(&irc.Message{
[13]408 Command: "NICK",
[69]409 Params: []string{uc.nick},
[60]410 })
411 uc.SendMessage(&irc.Message{
[13]412 Command: "USER",
[77]413 Params: []string{uc.username, "0", "*", uc.realname},
[60]414 })
[44]415}
[13]416
[55]417func (uc *upstreamConn) readMessages() error {
[13]418 for {
[55]419 msg, err := uc.irc.ReadMessage()
[13]420 if err == io.EOF {
421 break
422 } else if err != nil {
423 return fmt.Errorf("failed to read IRC command: %v", err)
424 }
425
[64]426 if uc.srv.Debug {
427 uc.logger.Printf("received: %v", msg)
428 }
429
[55]430 if err := uc.handleMessage(msg); err != nil {
431 uc.logger.Printf("failed to handle message %q: %v", msg, err)
[13]432 }
433 }
434
[45]435 return nil
[13]436}
[60]437
438func (uc *upstreamConn) SendMessage(msg *irc.Message) {
439 uc.messages <- msg
440}
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