1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117111811191120112111221123112411251126112711281129113011311132113311341135113611371138113911401141114211431144114511461147114811491150115111521153115411551156115711581159116011611162116311641165116611671168116911701171117211731174117511761177117811791180118111821183118411851186118711881189119011911192119311941195 |
- // Copyright (c) 2012-2014 Jeremy Latt
- // Copyright (c) 2014-2015 Edmund Huber
- // Copyright (c) 2016- Daniel Oaks <daniel@danieloaks.net>
- // released under the MIT license
-
- package irc
-
- import (
- "bufio"
- "crypto/tls"
- "encoding/base64"
- "fmt"
- "log"
- "net"
- "net/http"
- "os"
- "os/signal"
- "strconv"
- "strings"
- "syscall"
- "time"
-
- "github.com/DanielOaks/girc-go/ircmsg"
- "github.com/tidwall/buntdb"
- )
-
- // Limits holds the maximum limits for various things such as topic lengths
- type Limits struct {
- AwayLen int
- ChannelLen int
- KickLen int
- NickLen int
- TopicLen int
- }
-
- type Server struct {
- accounts map[string]*ClientAccount
- channels ChannelNameMap
- clients *ClientLookupSet
- commands chan Command
- ctime time.Time
- store buntdb.DB
- idle chan *Client
- limits Limits
- motdLines []string
- name string
- nameCasefolded string
- newConns chan clientConn
- operators map[string][]byte
- password []byte
- passwords *PasswordManager
- accountRegistration *AccountRegistration
- signals chan os.Signal
- proxyAllowedFrom []string
- whoWas *WhoWasList
- isupport *ISupportList
- checkIdent bool
- }
-
- var (
- SERVER_SIGNALS = []os.Signal{
- syscall.SIGINT,
- syscall.SIGHUP, // eventually we expect to use HUP to reload config
- syscall.SIGTERM,
- syscall.SIGQUIT,
- }
- )
-
- type clientConn struct {
- Conn net.Conn
- IsTLS bool
- }
-
- func NewServer(config *Config) *Server {
- casefoldedName, err := Casefold(config.Server.Name)
- if err != nil {
- log.Println(fmt.Sprintf("Server name isn't valid: []", config.Server.Name), err.Error())
- return nil
- }
-
- server := &Server{
- accounts: make(map[string]*ClientAccount),
- channels: make(ChannelNameMap),
- clients: NewClientLookupSet(),
- commands: make(chan Command),
- ctime: time.Now(),
- idle: make(chan *Client),
- limits: Limits{
- AwayLen: config.Limits.AwayLen,
- ChannelLen: config.Limits.ChannelLen,
- KickLen: config.Limits.KickLen,
- NickLen: config.Limits.NickLen,
- TopicLen: config.Limits.TopicLen,
- },
- name: config.Server.Name,
- nameCasefolded: casefoldedName,
- newConns: make(chan clientConn),
- operators: config.Operators(),
- signals: make(chan os.Signal, len(SERVER_SIGNALS)),
- proxyAllowedFrom: config.Server.ProxyAllowedFrom,
- whoWas: NewWhoWasList(config.Limits.WhowasEntries),
- checkIdent: config.Server.CheckIdent,
- }
-
- // open data store
- db, err := buntdb.Open(config.Datastore.Path)
- if err != nil {
- log.Fatal(fmt.Sprintf("Failed to open datastore: %s", err.Error()))
- }
- server.store = *db
-
- // load password manager
- err = server.store.View(func(tx *buntdb.Tx) error {
- saltString, err := tx.Get(keySalt)
- if err != nil {
- return fmt.Errorf("Could not retrieve salt string: %s", err.Error())
- }
-
- salt, err := base64.StdEncoding.DecodeString(saltString)
- if err != nil {
- return err
- }
-
- pwm := NewPasswordManager(salt)
- server.passwords = &pwm
- return nil
- })
- if err != nil {
- log.Fatal(fmt.Sprintf("Could not load salt: %s", err.Error()))
- }
-
- if config.Server.MOTD != "" {
- file, err := os.Open(config.Server.MOTD)
- if err == nil {
- defer file.Close()
-
- reader := bufio.NewReader(file)
- for {
- line, err := reader.ReadString('\n')
- if err != nil {
- break
- }
- line = strings.TrimRight(line, "\r\n")
- // "- " is the required prefix for MOTD, we just add it here to make
- // bursting it out to clients easier
- line = fmt.Sprintf("- %s", line)
-
- server.motdLines = append(server.motdLines, line)
- }
- }
- }
-
- if config.Server.Password != "" {
- server.password = config.Server.PasswordBytes()
- }
-
- server.loadChannels()
-
- for _, addr := range config.Server.Listen {
- server.listen(addr, config.TLSListeners())
- }
-
- if config.Server.Wslisten != "" {
- server.wslisten(config.Server.Wslisten, config.Server.TLSListeners)
- }
-
- // registration
- accountReg := NewAccountRegistration(config.Registration.Accounts)
- server.accountRegistration = &accountReg
-
- // Attempt to clean up when receiving these signals.
- signal.Notify(server.signals, SERVER_SIGNALS...)
-
- // add RPL_ISUPPORT tokens
- server.isupport = NewISupportList()
- server.isupport.Add("AWAYLEN", strconv.Itoa(server.limits.AwayLen))
- server.isupport.Add("CASEMAPPING", "rfc7700")
- server.isupport.Add("CHANMODES", strings.Join([]string{ChannelModes{BanMask, ExceptMask, InviteMask}.String(), "", ChannelModes{UserLimit, Key}.String(), ChannelModes{InviteOnly, Moderated, NoOutside, OpOnlyTopic, Persistent, ReOp, Secret}.String()}, ","))
- server.isupport.Add("CHANNELLEN", strconv.Itoa(config.Limits.ChannelLen))
- server.isupport.Add("CHANTYPES", "#")
- server.isupport.Add("EXCEPTS", "")
- server.isupport.Add("INVEX", "")
- server.isupport.Add("KICKLEN", strconv.Itoa(server.limits.KickLen))
- // server.isupport.Add("MAXLIST", "") //TODO(dan): Support max list length?
- // server.isupport.Add("MODES", "") //TODO(dan): Support max modes?
- server.isupport.Add("NETWORK", config.Network.Name)
- server.isupport.Add("NICKLEN", strconv.Itoa(config.Limits.NickLen))
- server.isupport.Add("PREFIX", "(qaohv)~&@%+")
- // server.isupport.Add("STATUSMSG", "@+") //TODO(dan): Support STATUSMSG
- // server.isupport.Add("TARGMAX", "") //TODO(dan): Support this
- server.isupport.Add("TOPICLEN", strconv.Itoa(server.limits.TopicLen))
-
- // account registration
- if server.accountRegistration.Enabled {
- // 'none' isn't shown in the REGCALLBACKS vars
- var enabledCallbacks []string
- for _, name := range server.accountRegistration.EnabledCallbacks {
- if name != "*" {
- enabledCallbacks = append(enabledCallbacks, name)
- }
- }
-
- server.isupport.Add("REGCOMMANDS", "CREATE,VERIFY")
- server.isupport.Add("REGCALLBACKS", strings.Join(enabledCallbacks, ","))
- server.isupport.Add("REGCREDTYPES", "passphrase,certfp")
- }
-
- server.isupport.RegenerateCachedReply()
-
- return server
- }
-
- func loadChannelList(channel *Channel, list string, maskMode ChannelMode) {
- if list == "" {
- return
- }
- channel.lists[maskMode].AddAll(strings.Split(list, " "))
- }
-
- func (server *Server) loadChannels() {
- //TODO(dan): Fix channel persistence
- /*
- rows, err := server.db.Query(`
- SELECT name, flags, key, topic, user_limit, ban_list, except_list,
- invite_list
- FROM channel`)
- if err != nil {
- log.Fatal("error loading channels: ", err)
- }
- for rows.Next() {
- var name, flags, key, topic string
- var userLimit uint64
- var banList, exceptList, inviteList string
- err = rows.Scan(&name, &flags, &key, &topic, &userLimit, &banList,
- &exceptList, &inviteList)
- if err != nil {
- log.Println("Server.loadChannels:", err)
- continue
- }
-
- channel := NewChannel(server, NewName(name), false)
- for _, flag := range flags {
- channel.flags[ChannelMode(flag)] = true
- }
- channel.key = key
- channel.topic = topic
- channel.userLimit = userLimit
- loadChannelList(channel, banList, BanMask)
- loadChannelList(channel, exceptList, ExceptMask)
- loadChannelList(channel, inviteList, InviteMask)
- }
- */
- }
-
- func (server *Server) Shutdown() {
- //TODO(dan): Make sure we disallow new nicks
- for _, client := range server.clients.byNick {
- client.Notice("Server is shutting down")
- }
-
- if err := server.store.Close(); err != nil {
- Log.error.Println("Server.Shutdown store.Close: error:", err)
- }
- }
-
- func (server *Server) Run() {
- // defer closing db/store
- defer server.store.Close()
-
- done := false
- for !done {
- select {
- case <-server.signals:
- server.Shutdown()
- done = true
-
- case conn := <-server.newConns:
- NewClient(server, conn.Conn, conn.IsTLS)
-
- /*TODO(dan): LOOK AT THIS MORE CLOSELY
- case cmd := <-server.commands:
- server.processCommand(cmd)
- */
-
- case client := <-server.idle:
- client.Idle()
- }
- }
- }
-
- //
- // listen goroutine
- //
-
- func (s *Server) listen(addr string, tlsMap map[string]*tls.Config) {
- //TODO(dan): we could casemap this but... eh
- config, listenTLS := tlsMap[addr]
-
- listener, err := net.Listen("tcp", addr)
- if err != nil {
- log.Fatal(s, "listen error: ", err)
- }
-
- tlsString := "plaintext"
- if listenTLS {
- config.ClientAuth = tls.RequestClientCert
- listener = tls.NewListener(listener, config)
- tlsString = "TLS"
- }
- Log.info.Printf("%s listening on %s using %s.", s.name, addr, tlsString)
-
- go func() {
- for {
- conn, err := listener.Accept()
- if err != nil {
- Log.error.Printf("%s accept error: %s", s.name, err)
- continue
- }
- Log.debug.Printf("%s accept: %s", s.name, conn.RemoteAddr())
-
- newConn := clientConn{
- Conn: conn,
- IsTLS: listenTLS,
- }
-
- s.newConns <- newConn
- }
- }()
- }
-
- //
- // websocket listen goroutine
- //
-
- func (s *Server) wslisten(addr string, tlsMap map[string]*TLSListenConfig) {
- http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
- if r.Method != "GET" {
- Log.error.Printf("%s method not allowed", s.name)
- return
- }
-
- // We don't have any subprotocols, so if someone attempts to `new
- // WebSocket(server, "subprotocol")` they'll break here, instead of
- // getting the default, ambiguous, response from gorilla.
- if v, ok := r.Header["Sec-Websocket-Protocol"]; ok {
- http.Error(w, fmt.Sprintf("WebSocket subprocotols (e.g. %s) not supported", v), 400)
- }
-
- ws, err := upgrader.Upgrade(w, r, nil)
- if err != nil {
- Log.error.Printf("%s websocket upgrade error: %s", s.name, err)
- return
- }
-
- newConn := clientConn{
- Conn: WSContainer{ws},
- IsTLS: false, //TODO(dan): track TLS or not here properly
- }
- s.newConns <- newConn
- })
- go func() {
- config, listenTLS := tlsMap[addr]
-
- tlsString := "plaintext"
- var err error
- if listenTLS {
- tlsString = "TLS"
- }
- Log.info.Printf("%s websocket listening on %s using %s.", s.name, addr, tlsString)
-
- if listenTLS {
- err = http.ListenAndServeTLS(addr, config.Cert, config.Key, nil)
- } else {
- err = http.ListenAndServe(addr, nil)
- }
- if err != nil {
- Log.error.Printf("%s listenAndServe (%s) error: %s", s.name, tlsString, err)
- }
- }()
- }
-
- //
- // server functionality
- //
-
- func (s *Server) tryRegister(c *Client) {
- if c.registered || !c.HasNick() || !c.HasUsername() ||
- (c.capState == CapNegotiating) {
- return
- }
- c.Register()
-
- // send welcome text
- //NOTE(dan): we specifically use the NICK here instead of the nickmask
- // see http://modern.ircdocs.horse/#rplwelcome-001 for details on why we avoid using the nickmask
- c.Send(nil, s.name, RPL_WELCOME, c.nick, fmt.Sprintf("Welcome to the Internet Relay Network %s", c.nick))
- c.Send(nil, s.name, RPL_YOURHOST, c.nick, fmt.Sprintf("Your host is %s, running version %s", s.name, Ver))
- c.Send(nil, s.name, RPL_CREATED, c.nick, fmt.Sprintf("This server was created %s", s.ctime.Format(time.RFC1123)))
- //TODO(dan): Look at adding last optional [<channel modes with a parameter>] parameter
- c.Send(nil, s.name, RPL_MYINFO, c.nick, s.name, Ver, supportedUserModesString, supportedChannelModesString)
- c.RplISupport()
- s.MOTD(c)
- c.Send(nil, c.nickMaskString, RPL_UMODEIS, c.nick, c.ModeString())
- }
-
- func (server *Server) MOTD(client *Client) {
- if len(server.motdLines) < 1 {
- client.Send(nil, server.name, ERR_NOMOTD, client.nick, "MOTD File is missing")
- return
- }
-
- client.Send(nil, server.name, RPL_MOTDSTART, client.nick, fmt.Sprintf("- %s Message of the day - ", server.name))
- for _, line := range server.motdLines {
- client.Send(nil, server.name, RPL_MOTD, client.nick, line)
- }
- client.Send(nil, server.name, RPL_ENDOFMOTD, client.nick, "End of MOTD command")
- }
-
- func (s *Server) Id() string {
- return s.name
- }
-
- func (s *Server) Nick() string {
- return s.Id()
- }
-
- //
- // registration commands
- //
-
- // PASS <password>
- func passHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- if client.registered {
- client.Send(nil, server.name, ERR_ALREADYREGISTRED, client.nick, "You may not reregister")
- return false
- }
-
- // if no password exists, skip checking
- if len(server.password) == 0 {
- client.authorized = true
- return false
- }
-
- // check the provided password
- password := []byte(msg.Params[0])
- if ComparePassword(server.password, password) != nil {
- client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
- client.Send(nil, server.name, "ERROR", "Password incorrect")
- return true
- }
-
- client.authorized = true
- return false
- }
-
- // PROXY TCP4/6 SOURCEIP DESTIP SOURCEPORT DESTPORT
- // http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt
- func proxyHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- clientAddress := IPString(client.socket.conn.RemoteAddr())
- clientHostname := client.hostname
-
- for _, address := range server.proxyAllowedFrom {
- if clientHostname == address || clientAddress == address {
- client.hostname = LookupHostname(msg.Params[1])
- return false
- }
- }
-
- client.Quit("PROXY command is not usable from your address")
- return true
- }
-
- // USER <username> * 0 <realname>
- func userHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- if client.registered {
- client.Send(nil, server.name, ERR_ALREADYREGISTRED, client.nick, "You may not reregister")
- return false
- }
-
- if !client.authorized {
- client.Quit("Bad password")
- return true
- }
-
- if client.username != "" && client.realname != "" {
- return false
- }
-
- // confirm that username is valid
- //
- _, err := CasefoldName(msg.Params[0])
- if err != nil {
- client.Send(nil, "", "ERROR", "Malformed username")
- return true
- }
-
- // set user info and log client in
- //TODO(dan): Could there be a race condition here with adding/removing the client?
- //TODO(dan): we should do something like server.clients.Replace(client) instead
-
- // we do it this way to ONLY replace what hasn't already been set
- server.clients.Remove(client)
-
- if !client.HasUsername() {
- client.username = "~" + msg.Params[0]
- client.updateNickMask()
- }
- if client.realname == "" {
- client.realname = msg.Params[3]
- }
-
- server.clients.Add(client)
- server.tryRegister(client)
-
- return false
- }
-
- // QUIT [<reason>]
- func quitHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- reason := "Quit"
- if len(msg.Params) > 0 {
- reason += ": " + msg.Params[0]
- }
- client.Quit(reason)
- return true
- }
-
- //
- // normal commands
- //
-
- // PING <server1> [<server2>]
- func pingHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- client.Send(nil, server.name, "PONG", msg.Params...)
- return false
- }
-
- // PONG <server> [ <server2> ]
- func pongHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- // client gets touched when they send this command, so we don't need to do anything
- return false
- }
-
- // JOIN <channel>{,<channel>} [<key>{,<key>}]
- // JOIN 0
- func joinHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- // handle JOIN 0
- if msg.Params[0] == "0" {
- for channel := range client.channels {
- channel.Part(client, client.nickCasefolded)
- }
- return false
- }
-
- // handle regular JOINs
- channels := strings.Split(msg.Params[0], ",")
- var keys []string
- if len(msg.Params) > 1 {
- keys = strings.Split(msg.Params[1], ",")
- }
-
- for i, name := range channels {
- casefoldedName, err := CasefoldChannel(name)
- if err != nil {
- log.Println("ISN'T CHANNEL NAME:", name)
- client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, name, "No such channel")
- continue
- }
-
- channel := server.channels.Get(casefoldedName)
- if channel == nil {
- channel = NewChannel(server, name, true)
- }
-
- var key string
- if len(keys) > i {
- key = keys[i]
- }
-
- channel.Join(client, key)
- }
- return false
- }
-
- // PART <channel>{,<channel>} [<reason>]
- func partHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- channels := strings.Split(msg.Params[0], ",")
- var reason string //TODO(dan): if this isn't supplied here, make sure the param doesn't exist in the PART message sent to other users
- if len(msg.Params) > 1 {
- reason = msg.Params[1]
- }
-
- for _, chname := range channels {
- casefoldedChannelName, err := CasefoldChannel(chname)
- channel := server.channels.Get(casefoldedChannelName)
-
- if err != nil || channel == nil {
- client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, "No such channel")
- continue
- }
-
- channel.Part(client, reason)
- }
- return false
- }
-
- // TOPIC <channel> [<topic>]
- func topicHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- name, err := CasefoldChannel(msg.Params[0])
- channel := server.channels.Get(name)
- if err != nil || channel == nil {
- client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, msg.Params[0], "No such channel")
- return false
- }
-
- if len(msg.Params) > 1 {
- channel.SetTopic(client, msg.Params[1])
- } else {
- channel.GetTopic(client)
- }
- return false
- }
-
- // PRIVMSG <target>{,<target>} <message>
- func privmsgHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- targets := strings.Split(msg.Params[0], ",")
- message := msg.Params[1]
-
- for _, targetString := range targets {
- target, err := CasefoldChannel(targetString)
- if err != nil {
- channel := server.channels.Get(target)
- if channel == nil {
- client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, targetString, "No such channel")
- continue
- }
- channel.PrivMsg(client, message)
- } else {
- target, err = CasefoldName(targetString)
- user := server.clients.Get(target)
- if err != nil || user == nil {
- client.Send(nil, server.name, ERR_NOSUCHNICK, target, "No such nick")
- continue
- }
- user.Send(nil, client.nickMaskString, "PRIVMSG", user.nick, message)
- if user.flags[Away] {
- //TODO(dan): possibly implement cooldown of away notifications to users
- client.Send(nil, server.name, RPL_AWAY, user.nick, user.awayMessage)
- }
- }
- }
- return false
- }
-
- func (client *Client) WhoisChannelsNames(target *Client) []string {
- isMultiPrefix := target.capabilities[MultiPrefix]
- var chstrs []string
- index := 0
- for channel := range client.channels {
- // channel is secret and the target can't see it
- if !target.flags[Operator] && channel.flags[Secret] && !channel.members.Has(target) {
- continue
- }
- chstrs = append(chstrs, channel.members[client].Prefixes(isMultiPrefix)+channel.name)
- index++
- }
- return chstrs
- }
-
- // WHOIS [ <target> ] <mask> *( "," <mask> )
- func whoisHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- var masksString string
- //var target string
-
- if len(msg.Params) > 1 {
- //target = msg.Params[0]
- masksString = msg.Params[1]
- } else {
- masksString = msg.Params[0]
- }
-
- if client.flags[Operator] {
- masks := strings.Split(masksString, ",")
- for _, mask := range masks {
- casefoldedMask, err := Casefold(mask)
- if err != nil {
- client.Send(nil, client.server.name, ERR_NOSUCHNICK, mask, "No such nick")
- continue
- }
- matches := server.clients.FindAll(casefoldedMask)
- if len(matches) == 0 {
- client.Send(nil, client.server.name, ERR_NOSUCHNICK, mask, "No such nick")
- continue
- }
- for mclient := range matches {
- client.getWhoisOf(mclient)
- }
- }
- } else {
- // specifically treat this as a single lookup rather than splitting as we do above
- // this is by design
- casefoldedMask, err := Casefold(masksString)
- mclient := server.clients.Get(casefoldedMask)
- if err != nil || mclient == nil {
- client.Send(nil, client.server.name, ERR_NOSUCHNICK, masksString, "No such nick")
- // fall through, ENDOFWHOIS is always sent
- } else {
- client.getWhoisOf(mclient)
- }
- }
- client.Send(nil, server.name, RPL_ENDOFWHOIS, client.nick, masksString, "End of /WHOIS list")
- return false
- }
-
- func (client *Client) getWhoisOf(target *Client) {
- client.Send(nil, client.server.name, RPL_WHOISUSER, client.nick, target.nick, target.username, target.hostname, "*", target.realname)
- //TODO(dan): ...one channel per reply? really?
- for _, line := range client.WhoisChannelsNames(target) {
- client.Send(nil, client.server.name, RPL_WHOISCHANNELS, client.nick, target.nick, line)
- }
- if target.flags[Operator] {
- client.Send(nil, client.server.name, RPL_WHOISOPERATOR, client.nick, target.nick, "is an IRC operator")
- }
- if target.certfp != "" && (client.flags[Operator] || client == target) {
- client.Send(nil, client.server.name, RPL_WHOISCERTFP, client.nick, target.nick, fmt.Sprintf("has client certificate fingerprint %s", target.certfp))
- }
- client.Send(nil, client.server.name, RPL_WHOISIDLE, client.nick, target.nick, strconv.FormatUint(target.IdleSeconds(), 10), strconv.FormatInt(target.SignonTime(), 10), "seconds idle, signon time")
- }
-
- // <channel> <user> <host> <server> <nick> ( "H" / "G" ) ["*"] [ ( "@" / "+" ) ]
- // :<hopcount> <real name>
- func (target *Client) RplWhoReply(channel *Channel, client *Client) {
- channelName := "*"
- flags := ""
-
- if client.flags[Away] {
- flags = "G"
- } else {
- flags = "H"
- }
- if client.flags[Operator] {
- flags += "*"
- }
-
- if channel != nil {
- flags += channel.members[client].Prefixes(target.capabilities[MultiPrefix])
- channelName = channel.name
- }
- target.Send(nil, target.server.name, RPL_WHOREPLY, target.nick, channelName, client.username, client.hostname, client.server.name, client.nick, flags, string(client.hops), client.realname)
- }
-
- func whoChannel(client *Client, channel *Channel, friends ClientSet) {
- for member := range channel.members {
- if !client.flags[Invisible] || friends[client] {
- client.RplWhoReply(channel, member)
- }
- }
- }
-
- // WHO [ <mask> [ "o" ] ]
- func whoHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- friends := client.Friends()
-
- var mask string
- if len(msg.Params) > 0 {
- casefoldedMask, err := Casefold(msg.Params[0])
- if err != nil {
- client.Send(nil, server.name, ERR_UNKNOWNERROR, "WHO", "Mask isn't valid")
- return false
- }
- mask = casefoldedMask
- }
-
- //TODO(dan): is this used and would I put this param in the Modern doc?
- // if not, can we remove it?
- //var operatorOnly bool
- //if len(msg.Params) > 1 && msg.Params[1] == "o" {
- // operatorOnly = true
- //}
-
- if mask == "" {
- for _, channel := range server.channels {
- whoChannel(client, channel, friends)
- }
- } else if mask[0] == '#' {
- // TODO implement wildcard matching
- //TODO(dan): ^ only for opers
- channel := server.channels.Get(mask)
- if channel != nil {
- whoChannel(client, channel, friends)
- }
- } else {
- for mclient := range server.clients.FindAll(mask) {
- client.RplWhoReply(nil, mclient)
- }
- }
-
- client.Send(nil, server.name, RPL_ENDOFWHO, client.nick, mask, "End of WHO list")
- return false
- }
-
- // OPER <name> <password>
- func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- name, err := CasefoldName(msg.Params[0])
- if err != nil {
- client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
- return true
- }
- hash := server.operators[name]
- password := []byte(msg.Params[1])
-
- err = ComparePassword(hash, password)
-
- if (hash == nil) || (err != nil) {
- client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
- return true
- }
-
- client.flags[Operator] = true
- client.Send(nil, server.name, RPL_YOUREOPER, client.nick, "You are now an IRC operator")
- //TODO(dan): Should this be sent automagically as part of setting the flag/mode?
- modech := ModeChanges{&ModeChange{
- mode: Operator,
- op: Add,
- }}
- client.Send(nil, server.name, "MODE", client.nick, modech.String())
- return false
- }
-
- // AWAY [<message>]
- func awayHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- var isAway bool
- var text string
- if len(msg.Params) > 0 {
- isAway = true
- text = msg.Params[0]
- if len(text) > server.limits.AwayLen {
- text = text[:server.limits.AwayLen]
- }
- }
-
- if isAway {
- client.flags[Away] = true
- } else {
- delete(client.flags, Away)
- }
- client.awayMessage = text
-
- var op ModeOp
- if client.flags[Away] {
- op = Add
- client.Send(nil, server.name, RPL_NOWAWAY, client.nick, "You have been marked as being away")
- } else {
- op = Remove
- client.Send(nil, server.name, RPL_UNAWAY, client.nick, "You are no longer marked as being away")
- }
- //TODO(dan): Should this be sent automagically as part of setting the flag/mode?
- modech := ModeChanges{&ModeChange{
- mode: Away,
- op: op,
- }}
- client.Send(nil, server.name, "MODE", client.nick, client.nick, modech.String())
-
- // dispatch away-notify
- for friend := range client.Friends(AwayNotify) {
- if client.flags[Away] {
- friend.SendFromClient(client, nil, client.nickMaskString, "AWAY", client.awayMessage)
- } else {
- friend.SendFromClient(client, nil, client.nickMaskString, "AWAY")
- }
- }
-
- return false
- }
-
- // ISON <nick>{ <nick>}
- func isonHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- var nicks = msg.Params
-
- var err error
- var casefoldedNick string
- ison := make([]string, 0)
- for _, nick := range nicks {
- casefoldedNick, err = CasefoldName(nick)
- if err != nil {
- continue
- }
- if iclient := server.clients.Get(casefoldedNick); iclient != nil {
- ison = append(ison, iclient.nick)
- }
- }
-
- client.Send(nil, server.name, RPL_ISON, client.nick, strings.Join(nicks, " "))
- return false
- }
-
- // MOTD [<target>]
- func motdHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- //TODO(dan): hook this up when we have multiple servers I guess???
- //var target string
- //if len(msg.Params) > 0 {
- // target = msg.Params[0]
- //}
-
- server.MOTD(client)
- return false
- }
-
- // NOTICE <target>{,<target>} <message>
- func noticeHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- targets := strings.Split(msg.Params[0], ",")
- message := msg.Params[1]
-
- for _, targetString := range targets {
- target, cerr := CasefoldChannel(targetString)
- if cerr == nil {
- channel := server.channels.Get(target)
- if channel == nil {
- // errors silently ignored with NOTICE as per RFC
- continue
- }
- channel.PrivMsg(client, message)
- } else {
- target, err := CasefoldName(targetString)
- if err != nil {
- continue
- }
-
- user := server.clients.Get(target)
- if user == nil {
- // errors silently ignored with NOTICE as per RFC
- continue
- }
- user.Send(nil, client.nickMaskString, "NOTICE", user.nick, message)
- }
- }
- return false
- }
-
- // KICK <channel>{,<channel>} <user>{,<user>} [<comment>]
- func kickHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- channels := strings.Split(msg.Params[0], ",")
- users := strings.Split(msg.Params[1], ",")
- if (len(channels) != len(users)) && (len(users) != 1) {
- client.Send(nil, server.name, ERR_NEEDMOREPARAMS, client.nick, "KICK", "Not enough parameters")
- return false
- }
-
- kicks := make(map[string]string)
- for index, channel := range channels {
- if len(users) == 1 {
- kicks[channel] = users[0]
- } else {
- kicks[channel] = users[index]
- }
- }
-
- var comment string
- if len(msg.Params) > 2 {
- comment = msg.Params[2]
- }
- for chname, nickname := range kicks {
- casefoldedChname, err := CasefoldChannel(chname)
- channel := server.channels.Get(casefoldedChname)
- if err != nil || channel == nil {
- client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, "No such channel")
- continue
- }
-
- casefoldedNickname, err := CasefoldName(nickname)
- target := server.clients.Get(casefoldedNickname)
- if err != nil || target == nil {
- client.Send(nil, server.name, ERR_NOSUCHNICK, nickname, "No such nick")
- continue
- }
-
- // make sure client has privs to kick the given user
- //TODO(dan): split this into a separate function that checks if users have privs
- // over other users, useful for things like -aoh as well
- var hasPrivs bool
- for _, mode := range ChannelPrivModes {
- if channel.members[client][mode] {
- hasPrivs = true
-
- // admins cannot kick other admins
- if mode == ChannelAdmin && channel.members[target][ChannelAdmin] {
- hasPrivs = false
- }
-
- break
- } else if channel.members[target][mode] {
- break
- }
- }
-
- if hasPrivs {
- if comment == "" {
- comment = nickname
- }
- channel.Kick(client, target, comment)
- } else {
- client.Send(nil, client.server.name, ERR_CHANOPRIVSNEEDED, chname, "You're not a channel operator")
- }
- }
- return false
- }
-
- // LIST [<channel>{,<channel>} [<server>]]
- func listHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- var channels []string
- if len(msg.Params) > 0 {
- channels = strings.Split(msg.Params[0], ",")
- }
- var target string
- if len(msg.Params) > 1 {
- target = msg.Params[1]
- }
-
- //TODO(dan): target server when we have multiple servers
- //TODO(dan): we should continue just fine if it's this current server though
- if target != "" {
- client.Send(nil, server.name, ERR_NOSUCHSERVER, client.nick, target, "No such server")
- return false
- }
-
- if len(channels) == 0 {
- for _, channel := range server.channels {
- if !client.flags[Operator] && channel.flags[Secret] {
- continue
- }
- client.RplList(channel)
- }
- } else {
- for _, chname := range channels {
- casefoldedChname, err := CasefoldChannel(chname)
- channel := server.channels.Get(casefoldedChname)
- if err != nil || channel == nil || (!client.flags[Operator] && channel.flags[Secret]) {
- client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, "No such channel")
- continue
- }
- client.RplList(channel)
- }
- }
- client.Send(nil, server.name, RPL_LISTEND, client.nick, "End of LIST")
- return false
- }
-
- func (target *Client) RplList(channel *Channel) {
- // get the correct number of channel members
- var memberCount int
- if target.flags[Operator] || channel.members.Has(target) {
- memberCount = len(channel.members)
- } else {
- for member := range channel.members {
- if !member.flags[Invisible] {
- memberCount += 1
- }
- }
- }
-
- target.Send(nil, target.server.name, RPL_LIST, target.nick, channel.name, string(memberCount), channel.topic)
- }
-
- // NAMES [<channel>{,<channel>}]
- func namesHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- var channels []string
- if len(msg.Params) > 0 {
- channels = strings.Split(msg.Params[0], ",")
- }
- //var target string
- //if len(msg.Params) > 1 {
- // target = msg.Params[1]
- //}
-
- if len(channels) == 0 {
- for _, channel := range server.channels {
- channel.Names(client)
- }
- return false
- }
-
- for _, chname := range channels {
- casefoldedChname, err := CasefoldChannel(chname)
- channel := server.channels.Get(casefoldedChname)
- if err != nil || channel == nil {
- client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, "No such channel")
- continue
- }
- channel.Names(client)
- }
- return false
- }
-
- // VERSION [<server>]
- func versionHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- var target string
- if len(msg.Params) > 0 {
- target = msg.Params[0]
- }
- casefoldedTarget, err := Casefold(target)
- if (target != "") && err != nil || (casefoldedTarget != server.nameCasefolded) {
- client.Send(nil, server.name, ERR_NOSUCHSERVER, client.nick, target, "No such server")
- return false
- }
-
- client.Send(nil, server.name, RPL_VERSION, client.nick, Ver, server.name)
- client.RplISupport()
- return false
- }
-
- // INVITE <nickname> <channel>
- func inviteHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- nickname := msg.Params[0]
- channelName := msg.Params[1]
-
- casefoldedNickname, err := CasefoldName(nickname)
- target := server.clients.Get(casefoldedNickname)
- if err != nil || target == nil {
- client.Send(nil, server.name, ERR_NOSUCHNICK, client.nick, nickname, "No such nick")
- return false
- }
-
- casefoldedChannelName, err := CasefoldChannel(channelName)
- channel := server.channels.Get(casefoldedChannelName)
- if err != nil || channel == nil {
- client.Send(nil, server.name, RPL_INVITING, client.nick, target.nick, channelName)
- target.Send(nil, client.nickMaskString, "INVITE", target.nick, channel.name)
- return true
- }
-
- channel.Invite(target, client)
- return false
- }
-
- // TIME [<server>]
- func timeHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- var target string
- if len(msg.Params) > 0 {
- target = msg.Params[0]
- }
- casefoldedTarget, err := Casefold(target)
- if (target != "") && err != nil || (casefoldedTarget != server.nameCasefolded) {
- client.Send(nil, server.name, ERR_NOSUCHSERVER, client.nick, target, "No such server")
- return false
- }
- client.Send(nil, server.name, RPL_TIME, client.nick, server.name, time.Now().Format(time.RFC1123))
- return false
- }
-
- // KILL <nickname> <comment>
- func killHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- nickname := msg.Params[0]
- comment := "<no reason supplied>"
- if len(msg.Params) > 1 {
- comment = msg.Params[1]
- }
-
- casefoldedNickname, err := CasefoldName(nickname)
- target := server.clients.Get(casefoldedNickname)
- if err != nil || target == nil {
- client.Send(nil, client.server.name, ERR_NOSUCHNICK, nickname, "No such nick")
- return false
- }
-
- quitMsg := fmt.Sprintf("Killed (%s (%s))", client.nick, comment)
- target.Quit(quitMsg)
- target.destroy()
- return false
- }
-
- // WHOWAS <nickname> [<count> [<server>]]
- func whowasHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
- nicknames := strings.Split(msg.Params[0], ",")
-
- var count int64
- if len(msg.Params) > 1 {
- count, _ = strconv.ParseInt(msg.Params[1], 10, 64)
- }
- //var target string
- //if len(msg.Params) > 2 {
- // target = msg.Params[2]
- //}
- for _, nickname := range nicknames {
- results := server.whoWas.Find(nickname, count)
- if len(results) == 0 {
- client.Send(nil, server.name, ERR_WASNOSUCHNICK, client.nick, nickname, "There was no such nickname")
- } else {
- for _, whoWas := range results {
- client.Send(nil, server.name, RPL_WHOWASUSER, client.nick, whoWas.nickname, whoWas.username, whoWas.hostname, "*", whoWas.realname)
- }
- }
- client.Send(nil, server.name, RPL_ENDOFWHOWAS, client.nick, nickname, "End of WHOWAS")
- }
- return false
- }
|