358 lines
9.3 KiB
Go
358 lines
9.3 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 = "ALIAS FRIEND UNFRIEND CASEMAPPING=rfc1459 CHANLIMIT=#:1024 CHANMODES=b,k,l,imnpst CHANNELLEN=200 CHANTYPES=# EXCEPTS=e KICKLEN MAXLIST=b:50,e:50 MODES=1 NETWORK=dnix.de NICKLEN=32 PREFIX=(aohv)&@%%+ SAFELIST STATUSMSG=&@%%+ TOPICLEN"
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type Server struct {
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Dispatch chan *irc.Message
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AddClient chan Client
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DelClient 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][]string
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config *conf.ConfigFile
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configPath string
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packetsTransferred float64
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clientConnections 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, created: "yes"}
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sv.Dispatch = make(chan *irc.Message, 1024)
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sv.AddClient = make(chan Client, 1024)
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sv.DelClient = make(chan Client, 1024)
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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.configPath = configPath
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sv.loadConfig()
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loglevel, _ := sv.config.GetInt("system", "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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xlog.Init(loglevel)
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sv.packetsTransferred = 0
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sv.clientConnections = 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.dispatch()
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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.clientConnections++
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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) dispatch() {
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for {
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time.Sleep(1 * time.Millisecond)
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sv.queueLen = float64(len(sv.Dispatch))
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select {
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case msg := <-sv.Dispatch:
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sv.recvMsg(msg)
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sv.packetsTransferred++
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case cl := <-sv.AddClient:
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name := cl.Name()
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sv.clients[name] = cl
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sv.sendLogon(cl.Name())
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xlog.Info("Client registered: '%s'", name)
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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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case cl := <-sv.DelClient:
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name := cl.Name()
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cl.Destroy()
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delete(sv.clients, name)
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xlog.Info("Client deleted: '%s'", name)
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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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ch := msg.Args[0]
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if _, exists := sv.chUsers[ch]; !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 nick, _ := range sv.chUsers[ch] {
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if msg.Pre == nick && msg.Cmd == "PRIVMSG" {
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continue
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}
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sv.clients[nick].Receive(msg)
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}
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} else {
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if _, exists := sv.clients[msg.Args[0]]; !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[msg.Args[0]]
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cl.Receive(msg)
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}
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}
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func (sv *Server) sendReply(tar, cmd, args, trail string) {
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if _, exists := sv.clients[tar]; !exists {
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return
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}
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cl := sv.clients[tar]
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if args != "" {
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args = tar + " " + args
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} else {
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args = tar
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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("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) channelJoin(nick, ch string) {
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if _, exists := sv.chUsers[ch]; !exists {
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sv.chUsers[ch] = make(map[string]string)
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sv.chTopics[ch] = ""
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}
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if _, exists := sv.chUsers[ch][nick]; exists {
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return
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}
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sv.chUsers[ch][nick] = ""
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sv.sendMsg(irc.M(nick, "JOIN", ch, ""))
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sv.sendReply(nick, RPL_TOPIC, ch, sv.chTopics[ch])
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sv.channelNames(nick, ch)
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}
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func (sv *Server) channelPart(nick, ch, reason string) {
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if _, exists := sv.chUsers[ch]; !exists {
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return
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}
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if _, exists := sv.chUsers[ch][nick]; !exists {
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return
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}
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sv.sendMsg(irc.M(nick, "PART", ch, reason))
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delete(sv.chUsers[ch], nick)
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}
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func (sv *Server) channelNames(nick, ch string) {
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if _, exists := sv.chUsers[ch]; !exists {
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return
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}
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names := ""
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for name, mode := range sv.chUsers[ch] {
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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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sv.channelJoin(msg.Pre, msg.Args[0])
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}
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func handleCmdPart(sv *Server, msg *irc.Message) {
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sv.channelPart(msg.Pre, msg.Args[0], msg.Trail)
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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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}
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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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