383 lines
9.8 KiB
Go
383 lines
9.8 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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"strconv"
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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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channels map[string]map[string]string
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ports map[int]bool
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config *conf.ConfigFile
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configPath string
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}
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func init() {
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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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srv := &Server{software: software, version: version, created: "yes"}
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srv.Dispatch = make(chan *irc.Message, 1024)
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srv.AddClient = make(chan Client, 1024)
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srv.DelClient = make(chan Client, 1024)
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srv.clients = make(map[string]Client)
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srv.channels = make(map[string]map[string]string)
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srv.configPath = configPath
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srv.loadConfig()
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loglevel, _ := srv.config.GetInt("system", "loglevel")
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srv.host, _ = srv.config.GetString("server", "host")
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srv.info, _ = srv.config.GetString("server", "info")
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srv.motd, _ = srv.config.GetString("server", "motd")
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xlog.Init(loglevel)
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return srv
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}
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// Open the listening port and start the main server loop.
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func (srv *Server) Run() {
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xlog.Info("%s/%s", srv.software, srv.version)
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address, _ := srv.config.GetString("net", "address")
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port, _ := srv.config.GetInt("net", "port")
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go srv.listen(address, port)
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srv.dispatch()
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}
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func (srv *Server) listen(address string, port int) {
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if _, exists := srv.ports[port]; exists {
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xlog.Warning("Port %i already opened", port)
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}
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listen, err := net.Listen("tcp", address+":"+strconv.Itoa(port))
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if err != nil {
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xlog.Fatal("Cannot listen on port %i (%s), exiting",
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port, err.Error())
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os.Exit(-1)
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}
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xlog.Info("Start listening on port %d", port)
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for {
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time.Sleep(1e6)
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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(srv, conn)
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}
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}
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}
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func (srv *Server) dispatch() {
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xlog.Debug("Entering msg dispatcher")
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for {
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time.Sleep(1 * time.Millisecond)
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select {
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case msg := <-srv.Dispatch:
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srv.recvMsg(msg)
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case cl := <-srv.AddClient:
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name := cl.Name()
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if _, exists := srv.clients[name]; exists {
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xlog.Warning("Client registration failed: '%s'", name)
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go func() { cl.Register() <- false }()
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continue
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}
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go func() { cl.Register() <- true }()
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srv.clients[name] = cl
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xlog.Info("Client registered: '%s'", name)
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xlog.Info("Server has %d client(s)", len(srv.clients))
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xlog.Debug("Goroutines running: %d", runtime.NumGoroutine())
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srv.clientLogon(cl)
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srv.clientMotd(cl)
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case cl := <-srv.DelClient:
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name := cl.Name()
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cl.Destroy()
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//go func() {
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// time.Sleep(10 * time.Second)
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delete(srv.clients, name)
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//}()
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xlog.Info("Client deleted: '%s'", name)
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xlog.Info("Server has %d client(s)", len(srv.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 (srv *Server) loadConfig() {
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cfg, err := conf.ReadConfigFile(srv.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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srv.config = cfg
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}
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func (srv *Server) recvMsg(msg *irc.Message) {
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cmd := msg.Cmd
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hook, exists := srvCommandHooks[cmd]
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if !exists {
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srv.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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srv.sendReply(msg.Pre, ERR_NEEDMOREPARAMS, cmd, "Not enough parameters")
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return
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}
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hook.HookFn(srv, msg)
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}
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func (srv *Server) sendMsg(msg *irc.Message) {
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if strings.HasPrefix(msg.Args[0], "#") {
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srv.channelBroadcast(msg.Args[0], msg)
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} else {
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srv.sendMsgToClient(msg)
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}
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}
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func (srv *Server) sendMsgToChannel(msg *irc.Message) {
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cname := msg.Args[0]
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if _, exists := srv.channels[cname]; !exists {
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return
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}
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subs := srv.channels[cname]
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for sub, _ := range subs {
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if _, exists := srv.clients[sub]; !exists {
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continue
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}
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cl := srv.clients[sub]
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cl.Receive(msg)
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}
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}
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func (srv *Server) sendMsgToClient(msg *irc.Message) {
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if _, exists := srv.clients[msg.Args[0]]; !exists {
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xlog.Error("sendMsgToClient: Client '%s' does not exist", msg.Args[0])
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return
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}
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cl := srv.clients[msg.Args[0]]
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cl.Receive(msg)
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}
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func (srv *Server) sendReply(tar, cmd, args, trail string) {
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if _, exists := srv.clients[tar]; !exists {
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xlog.Error("sendReply: Client '%s' does not exist", tar)
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return
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}
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cl := srv.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(srv.host, cmd, args, trail))
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}
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func (srv *Server) clientLogon(cl Client) {
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srv.sendReply(cl.Name(), RPL_WELCOME, "", "Willkommen!")
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srv.sendReply(cl.Name(), RPL_YOURHOST, "",
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fmt.Sprintf("Your host is %s, running on %s/%s",
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srv.host, srv.software, srv.version))
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srv.sendReply(cl.Name(), RPL_CREATED, "",
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fmt.Sprintf("Created: %s", srv.created))
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srv.sendReply(cl.Name(), RPL_MYINFO, "",
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fmt.Sprintf(myinfo, srv.host, srv.software, srv.version))
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srv.sendReply(cl.Name(), RPL_ISUPPORT, "",
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isupport+" are supported by this server")
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}
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func (srv *Server) clientMotd(cl Client) {
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srv.sendReply(cl.Name(), RPL_MOTDSTART, "",
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fmt.Sprintf("- %s Message of the day -", srv.host))
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for _, line := range strings.Split(srv.motd, "\n") {
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srv.sendReply(cl.Name(), RPL_MOTD, "", fmt.Sprintf("- %s", line))
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}
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srv.sendReply(cl.Name(), RPL_ENDOFMOTD, "", "End of MOTD command")
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}
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func (srv *Server) channelBroadcast(ch string, msg *irc.Message) {
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for nick, _ := range srv.channels[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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srv.clients[nick].Receive(msg)
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}
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}
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func (srv *Server) channelJoin(nick, ch string) {
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if _, exists := srv.channels[ch]; !exists {
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srv.channels[ch] = make(map[string]string)
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}
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if _, exists := srv.channels[ch][nick]; exists {
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return
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}
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srv.channels[ch][nick] = ""
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srv.channelBroadcast(ch, irc.M(nick, "JOIN", ch, ""))
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}
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func (srv *Server) channelPart(nick, ch, reason string) {
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if _, exists := srv.channels[ch]; !exists {
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return
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}
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if _, exists := srv.channels[ch][nick]; !exists {
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return
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}
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srv.channelBroadcast(ch, irc.M(nick, "PART", ch, reason))
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delete(srv.channels[ch], nick)
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}
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type SrvCommandHook struct {
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HookFn func(srv *Server, msg *irc.Message)
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MinArgs int
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NeedOper bool
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NeedAuth bool
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}
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var srvCommandHooks = map[string]SrvCommandHook{
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"PRIVMSG": {srvHandleCmdPrivmsg, 1, false, false},
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"JOIN": {srvHandleCmdJoin, 1, false, false},
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"PART": {srvHandleCmdPart, 1, false, false},
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"QUIT": {srvHandleCmdQuit, 0, false, false},
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"MODE": {srvHandleCmdMode, 1, false, false},
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"LIST": {srvHandleCmdList, 0, false, false},
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"VERSION": {srvHandleCmdVersion, 0, false, false},
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"STATS": {srvHandleCmdStats, 0, false, false},
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"TIME": {srvHandleCmdTime, 0, false, false},
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"OPER": {srvHandleCmdOper, 1, false, false},
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"ADMIN": {srvHandleCmdAdmin, 0, false, false},
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"INFO": {srvHandleCmdInfo, 0, false, false},
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"WHO": {srvHandleCmdWho, 0, false, false},
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"WHOIS": {srvHandleCmdWhois, 0, false, false},
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"WHOWAS": {srvHandleCmdWhowas, 0, false, false},
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"KILL": {srvHandleCmdKill, 0, false, false},
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"PING": {srvHandleCmdPing, 0, false, false},
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"PONG": {srvHandleCmdPong, 0, false, false},
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"ERROR": {srvHandleCmdError, 0, false, false},
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"AWAY": {srvHandleCmdAway, 0, false, false},
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"REHASH": {srvHandleCmdRehash, 0, false, false},
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"RESTART": {srvHandleCmdRestart, 0, false, false},
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"SUMMON": {srvHandleCmdSummon, 0, false, false},
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"USERS": {srvHandleCmdUsers, 0, false, false},
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"USERHOST": {srvHandleCmdUserhost, 0, false, false},
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"ISON": {srvHandleCmdIson, 0, false, false},
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}
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func srvHandleCmdPrivmsg(srv *Server, msg *irc.Message) {
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srv.sendMsg(msg)
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}
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func srvHandleCmdJoin(srv *Server, msg *irc.Message) {
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srv.channelJoin(msg.Pre, msg.Args[0])
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}
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func srvHandleCmdPart(srv *Server, msg *irc.Message) {
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srv.channelPart(msg.Pre, msg.Args[0], msg.Trail)
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}
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func srvHandleCmdOper(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdQuit(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdMode(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdList(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdVersion(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdStats(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdTime(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdAdmin(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdInfo(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdWho(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdWhois(srv *Server, msg *irc.Message) {
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srv.sendReply(msg.Pre, RPL_WHOISUSER, "nick user host *", "real name")
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}
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func srvHandleCmdWhowas(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdKill(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdPing(srv *Server, msg *irc.Message) {
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srv.sendReply(msg.Pre, "PONG", msg.Args[0], "")
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}
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func srvHandleCmdPong(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdError(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdAway(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdRehash(srv *Server, msg *irc.Message) {
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srv.loadConfig()
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srv.sendReply(msg.Pre, RPL_REHASHING, "", "Rehashing.")
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xlog.Info("Rehashing")
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}
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func srvHandleCmdRestart(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdSummon(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdUsers(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdUserhost(srv *Server, msg *irc.Message) {
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}
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func srvHandleCmdIson(srv *Server, msg *irc.Message) {
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}
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