422 lines
10 KiB
Go
422 lines
10 KiB
Go
// vim:ts=4:sts=4:sw=4:noet:tw=72
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package ircd
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import (
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"fmt"
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"net"
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"os"
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"runtime"
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"strings"
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"time"
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"code.dnix.de/an/conf"
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"code.dnix.de/an/irc"
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"code.dnix.de/an/xlog"
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)
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const (
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CHANLIMIT = 1024
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CHANNELLEN = 200
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TOPICLEN = 1024
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)
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var myinfo string = "%s %s/%s * *"
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var isupport string = "CASEMAPPING=rfc1459 CHANTYPES=# NICKLEN=32 PREFIX=(aohv)&@%%+"
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type Server struct {
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queue chan *irc.Message
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addq chan Client
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delq chan Client
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host string
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info string
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software string
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version string
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created string
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motd string
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clients map[string]Client
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chUsers map[string]map[string]string
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chTopics map[string]string
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chModes map[string]map[string]bool
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config *conf.ConfigFile
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configPath string
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packetsTransferred float64
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connectionsCurrent float64
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connectionsCount float64
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queueLen float64
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}
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// Create a new server instance.
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func NewServer(configPath, software, version string) *Server {
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sv := &Server{software: software, version: version,
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created: time.Now().String()}
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sv.queue = make(chan *irc.Message, 1024)
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sv.addq = make(chan Client, 128)
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sv.delq = make(chan Client, 128)
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sv.clients = make(map[string]Client)
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sv.chUsers = make(map[string]map[string]string)
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sv.chTopics = make(map[string]string)
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sv.chModes = make(map[string]map[string]bool)
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sv.configPath = configPath
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sv.loadConfig()
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loglevel, _ := sv.config.GetInt("system", "loglevel")
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xlog.Init(loglevel)
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sv.host, _ = sv.config.GetString("server", "host")
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sv.info, _ = sv.config.GetString("server", "info")
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sv.motd, _ = sv.config.GetString("server", "motd")
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sv.packetsTransferred = 0
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sv.connectionsCurrent = 0
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sv.connectionsCount = 0
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sv.queueLen = 0
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return sv
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}
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// Open the listening port and start the main server loop.
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func (sv *Server) Run() {
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xlog.Info("%s/%s", sv.software, sv.version)
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go monitoringRun(sv)
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laddr, err := sv.config.GetString("net", "listen")
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if err == nil {
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go sv.listen(laddr)
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}
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laddr, err = sv.config.GetString("net", "listen_tls")
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if err == nil {
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go sv.listenTls(laddr)
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}
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sv.dispatcher()
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}
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func (sv *Server) Dispatch(msg *irc.Message) {
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sv.queue <- msg
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}
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func (sv *Server) AddClient(cl Client) {
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sv.addq <- cl
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}
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func (sv *Server) DelClient(cl Client) {
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sv.delq <- cl
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}
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func (sv *Server) listen(laddr string) {
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listen, err := net.Listen("tcp", laddr)
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if err != nil {
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xlog.Fatal(err.Error())
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os.Exit(-1)
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}
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for {
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time.Sleep(1 * time.Millisecond)
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conn, err := listen.Accept()
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if err != nil {
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xlog.Error(err.Error())
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} else {
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NewRemoteClient(sv, conn)
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sv.connectionsCount++
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}
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}
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}
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func (sv *Server) listenTls(laddr string) {
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}
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func (sv *Server) dispatcher() {
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for {
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time.Sleep(1 * time.Microsecond)
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sv.queueLen = float64(len(sv.queue))
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select {
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case msg := <-sv.queue:
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sv.recvMsg(msg)
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sv.packetsTransferred++
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case cl := <-sv.addq:
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clid := strings.ToLower(cl.Name())
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if _, exists := sv.clients[clid]; exists {
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cl.Register(false)
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xlog.Info("Client registration failed: '%s'", clid)
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} else {
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sv.clients[clid] = cl
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sv.sendLogon(cl.Name())
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sv.connectionsCurrent = float64(len(sv.clients))
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cl.Register(true)
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xlog.Info("Client registered: '%s'", clid)
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xlog.Info("Server has %d client(s)", len(sv.clients))
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xlog.Debug("Goroutines running: %d", runtime.NumGoroutine())
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}
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case cl := <-sv.delq:
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clid := strings.ToLower(cl.Name())
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cl.Destroy()
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for chname, ch := range sv.chUsers {
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if _, exists := ch[clid]; exists {
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delete(ch, clid)
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sv.sendMsg(irc.M(cl.Name(), "PART", chname, "quit"))
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}
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}
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delete(sv.clients, clid)
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sv.connectionsCurrent = float64(len(sv.clients))
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xlog.Info("Client deleted: '%s'", clid)
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xlog.Info("Server has %d client(s)", len(sv.clients))
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xlog.Debug("Goroutines running: %d", runtime.NumGoroutine())
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default:
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}
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}
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}
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func (sv *Server) loadConfig() {
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cfg, err := conf.ReadConfigFile(sv.configPath)
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if err != nil {
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xlog.Fatal("Can't read config file (%s)", err.Error())
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os.Exit(-1)
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}
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sv.config = cfg
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}
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func (sv *Server) recvMsg(msg *irc.Message) {
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cmd := msg.Cmd
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hook, exists := svCommandHooks[cmd]
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if !exists {
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sv.sendReply(msg.Pre, ERR_UNKNOWNCOMMAND, cmd, "Unknown command")
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return
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}
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argc := len(msg.Args)
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if argc < hook.MinArgs {
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sv.sendReply(msg.Pre, ERR_NEEDMOREPARAMS, cmd, "Not enough parameters")
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return
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}
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if hook.NeedTrail && msg.Trail == "" {
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sv.sendReply(msg.Pre, ERR_NEEDMOREPARAMS, cmd, "Not enough parameters")
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return
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}
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hook.HookFn(sv, msg)
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}
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func (sv *Server) sendMsg(msg *irc.Message) {
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if strings.HasPrefix(msg.Args[0], "#") {
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chid := strings.ToLower(msg.Args[0])
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if _, exists := sv.chUsers[chid]; !exists {
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sv.sendReply(msg.Pre, ERR_NOSUCHNICK, msg.Args[0], "No such nick/channel")
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return
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}
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for clid, _ := range sv.chUsers[chid] {
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if strings.ToLower(msg.Pre) == clid && msg.Cmd == "PRIVMSG" {
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continue
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}
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if cl, exists := sv.clients[clid]; exists {
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cl.Receive(msg)
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}
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}
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} else {
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clid := strings.ToLower(msg.Args[0])
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if _, exists := sv.clients[clid]; !exists {
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sv.sendReply(msg.Pre, ERR_NOSUCHNICK, msg.Args[0], "No such nick/channel")
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return
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}
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cl := sv.clients[clid]
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cl.Receive(msg)
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}
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}
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func (sv *Server) sendReply(nick, cmd, args, trail string) {
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clid := strings.ToLower(nick)
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if _, exists := sv.clients[clid]; !exists {
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return
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}
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cl := sv.clients[clid]
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if args != "" {
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args = nick + " " + args
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} else {
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args = nick
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}
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cl.Receive(irc.M(sv.host, cmd, args, trail))
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}
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func (sv *Server) sendLogon(nick string) {
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sv.sendReply(nick, RPL_WELCOME, "", "Willkommen!")
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sv.sendReply(nick, RPL_YOURHOST, "",
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fmt.Sprintf("Your host is %s, running on %s/%s",
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sv.host, sv.software, sv.version))
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sv.sendReply(nick, RPL_CREATED, "",
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fmt.Sprintf("This server was created %s", sv.created))
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sv.sendReply(nick, RPL_MYINFO, "",
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fmt.Sprintf(myinfo, sv.host, sv.software, sv.version))
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sv.sendReply(nick, RPL_ISUPPORT, "",
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isupport+" are supported by this server")
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sv.sendReply(nick, RPL_MOTDSTART, "",
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fmt.Sprintf("- %s Message of the day -", sv.host))
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for _, line := range strings.Split(sv.motd, "\n") {
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sv.sendReply(nick, RPL_MOTD, "", fmt.Sprintf("- %s", line))
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}
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sv.sendReply(nick, RPL_ENDOFMOTD, "", "End of MOTD command")
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}
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func (sv *Server) channelNames(nick, ch string) {
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chid := strings.ToLower(ch)
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if _, exists := sv.chUsers[chid]; !exists {
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return
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}
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names := ""
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for clid, mode := range sv.chUsers[chid] {
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name := sv.clients[clid].Name()
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if names != "" {
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names += " "
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}
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names = names + mode + name
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}
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sv.sendReply(nick, RPL_NAMEREPLY, "= "+ch, names)
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sv.sendReply(nick, RPL_ENDOFNAMES, ch, "End of /NAMES list")
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}
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type commandHook struct {
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HookFn func(sv *Server, msg *irc.Message)
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MinArgs int
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NeedTrail bool
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NeedOper bool
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NeedAuth bool
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}
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var svCommandHooks = map[string]commandHook{
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"PRIVMSG": {handleCmdPrivmsg, 1, true, false, false},
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"JOIN": {handleCmdJoin, 1, false, false, false},
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"PART": {handleCmdPart, 1, false, false, false},
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"QUIT": {handleCmdQuit, 0, false, false, false},
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"MODE": {handleCmdMode, 1, false, false, false},
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"TOPIC": {handleCmdTopic, 1, false, false, false},
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"NAMES": {handleCmdNames, 1, false, false, false},
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"WHOIS": {handleCmdWhois, 0, false, false, false},
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"PING": {handleCmdPing, 1, false, false, false},
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"REHASH": {handleCmdRehash, 0, false, false, false},
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/*
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"LIST": {handleCmdList, 0, false, false},
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"VERSION": {handleCmdVersion, 0, false, false},
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"STATS": {handleCmdStats, 0, false, false},
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"TIME": {handleCmdTime, 0, false, false},
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"OPER": {handleCmdOper, 1, false, false},
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"ADMIN": {handleCmdAdmin, 0, false, false},
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"INFO": {handleCmdInfo, 0, false, false},
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"WHO": {handleCmdWho, 0, false, false},
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"WHOWAS": {handleCmdWhowas, 0, false, false},
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"KILL": {handleCmdKill, 0, false, false},
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"PONG": {handleCmdPong, 0, false, false},
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"ERROR": {handleCmdError, 0, false, false},
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"AWAY": {handleCmdAway, 0, false, false},
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"RESTART": {handleCmdRestart, 0, false, false},
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"SUMMON": {handleCmdSummon, 0, false, false},
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"USERS": {handleCmdUsers, 0, false, false},
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"USERHOST": {handleCmdUserhost, 0, false, false},
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"ISON": {handleCmdIson, 0, false, false},
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*/
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}
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func handleCmdPrivmsg(sv *Server, msg *irc.Message) {
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sv.sendMsg(msg)
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}
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func handleCmdJoin(sv *Server, msg *irc.Message) {
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clid := strings.ToLower(msg.Pre)
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chid := strings.ToLower(msg.Args[0])
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if _, exists := sv.chUsers[chid]; !exists {
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sv.chUsers[chid] = make(map[string]string)
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sv.chTopics[chid] = ""
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sv.chModes[chid] = make(map[string]bool)
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}
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if _, exists := sv.chUsers[chid][clid]; exists {
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return
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}
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sv.chUsers[chid][clid] = ""
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sv.sendMsg(msg)
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sv.sendReply(msg.Pre, RPL_TOPIC, msg.Args[0], sv.chTopics[msg.Args[0]])
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sv.channelNames(msg.Pre, msg.Args[0])
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}
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func handleCmdPart(sv *Server, msg *irc.Message) {
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clid := strings.ToLower(msg.Pre)
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chid := strings.ToLower(msg.Args[0])
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if _, exists := sv.chUsers[chid]; !exists {
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return
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}
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if _, exists := sv.chUsers[chid][clid]; !exists {
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return
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}
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sv.sendMsg(msg)
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delete(sv.chUsers[chid], clid)
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}
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func handleCmdQuit(sv *Server, msg *irc.Message) {
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}
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func handleCmdMode(sv *Server, msg *irc.Message) {
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if strings.HasPrefix(msg.Args[0], "#") {
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chid := strings.ToLower(msg.Args[0])
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if _, exists := chUsers[chid]; !exists {
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return
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}
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if _, exists = msg.Args[1]; !exists {
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return
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}
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modeFlag := strings.ToLower(msg.Args[1])
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if _, exists = msg.Args[2]; !exists {
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modeTar := ""
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} else {
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modeTar := strings.ToLower(msg.Args[2])
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}
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switch modeFlag {
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case "+o":
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case "-o":
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case "+h":
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case "-h":
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case "+b":
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case "-b":
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case "+v":
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case "-v":
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}
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sv.sendMsg(msg)
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}
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}
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func handleCmdTopic(sv *Server, msg *irc.Message) {
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ch := msg.Args[0]
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if _, exists := sv.chUsers[ch]; !exists {
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sv.sendReply(msg.Pre, ERR_NOSUCHCHANNEL, ch, "No such channel")
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}
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if msg.Trail == "" {
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sv.sendReply(msg.Pre, RPL_TOPIC, ch, sv.chTopics[ch])
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} else {
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sv.chTopics[ch] = msg.Trail
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sv.sendMsg(msg)
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//sv.sendReply(msg.Pre, RPL_TOPIC, ch, msg.Trail)
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}
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}
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func handleCmdNames(sv *Server, msg *irc.Message) {
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ch := msg.Args[0]
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if _, exists := sv.chUsers[ch]; !exists {
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sv.sendReply(msg.Pre, ERR_NOSUCHCHANNEL, ch, "No such channel")
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}
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sv.channelNames(msg.Pre, ch)
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}
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func handleCmdWhois(sv *Server, msg *irc.Message) {
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sv.sendReply(msg.Pre, RPL_WHOISUSER, "nick user host *", "real name")
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}
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func handleCmdPing(sv *Server, msg *irc.Message) {
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sv.sendReply(msg.Pre, "PONG", msg.Args[0], "")
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}
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func handleCmdRehash(sv *Server, msg *irc.Message) {
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sv.loadConfig()
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sv.sendReply(msg.Pre, RPL_REHASHING, "", "Rehashing.")
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xlog.Info("Rehashing")
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}
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