337 lines
8.4 KiB
Go
337 lines
8.4 KiB
Go
// vim:ts=4:sts=4:sw=4:noet:tw=72
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package main
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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 flagConfig string
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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 ControlMsg struct {
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Opcode int
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Client *Client
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}
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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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subscriptions 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.Host = "dnix.de"
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srv.clients = make(map[string]*Client)
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srv.subscriptions = make(map[string][]string)
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srv.info = ""
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srv.motd = `foo bar baz.`
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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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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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srv.Host, _ = srv.config.GetString("server", "host")
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srv.info, _ = srv.config.GetString("server", "info")
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port, _ := srv.config.GetInt("net", "port")
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go srv.listen(port)
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srv.dispatch()
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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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delete(srv.clients, name)
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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) listen(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", ":"+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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NewClient(srv, conn)
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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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if msg.Args[0] != "" {
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srv.sendMsg(msg)
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return
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}
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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.sendCommand(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.sendCommand(msg.Pre, ERR_NEEDMOREPARAMS, cmd,
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"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.sendMsgToChannel(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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subj := msg.Args[0]
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if _, exists := srv.subscriptions[subj]; !exists {
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return
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}
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subs := srv.subscriptions[subj]
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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("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) sendCommand(dst, cmd, args, trail string) {
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srv.sendMsg(irc.M(srv.Host, cmd, args, trail))
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}
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func (srv *Server) sendClient(cl *Client, cmd, args, trail string) {
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srv.sendMsg(irc.M(srv.Host, cmd, cl.Name()+" "+args, trail))
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}
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func (srv *Server) clientLogon(cl *Client) {
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srv.sendClient(cl, RPL_WELCOME, "", "Willkommen!")
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srv.sendClient(cl, 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.sendClient(cl, RPL_CREATED, "", fmt.Sprintf("Created: %s", srv.created))
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srv.sendClient(cl, RPL_MYINFO,
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fmt.Sprintf(myinfo, srv.Host, srv.software, srv.version), "")
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srv.sendClient(cl, RPL_ISUPPORT, 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.sendClient(cl, 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.sendClient(cl, RPL_MOTD, "", fmt.Sprintf("- %s", line))
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}
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srv.sendClient(cl, RPL_ENDOFMOTD, "", "End of MOTD command")
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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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"OPER": {srvHandleCmdOper, 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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"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 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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}
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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.sendCommand(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.sendCommand(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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