ircd/server.go

443 lines
11 KiB
Go

// vim:ts=4:sts=4:sw=4:noet:tw=72
package ircd
import (
"fmt"
"net"
"os"
"runtime"
"strings"
"time"
"code.dnix.de/an/conf"
"code.dnix.de/an/irc"
"code.dnix.de/an/xlog"
)
const (
CHANLIMIT = 1024
CHANNELLEN = 200
TOPICLEN = 1024
)
var myinfo string = "%s %s/%s * *"
var isupport string = "CASEMAPPING=rfc1459 CHANTYPES=# NICKLEN=32 PREFIX=(aohv)&@%%+"
type Server struct {
queue chan *irc.Message
addq chan Client
delq chan Client
host string
info string
software string
version string
created string
motd string
clients map[string]Client
chUsers map[string]map[string]string
chTopics map[string]string
chModes map[string]map[string]bool
config *conf.ConfigFile
configPath string
packetsTransferred float64
connectionsCurrent float64
connectionsCount float64
queueLen float64
authCallback func(name, pass string) bool
}
// Create a new server instance.
func NewServer(configPath, software, version string) *Server {
sv := &Server{software: software, version: version,
created: time.Now().String()}
sv.queue = make(chan *irc.Message, 1024)
sv.addq = make(chan Client, 128)
sv.delq = make(chan Client, 128)
sv.clients = make(map[string]Client)
sv.chUsers = make(map[string]map[string]string)
sv.chTopics = make(map[string]string)
sv.chModes = make(map[string]map[string]bool)
sv.configPath = configPath
sv.loadConfig()
loglevel, _ := sv.config.GetInt("system", "loglevel")
xlog.Init(loglevel)
sv.host, _ = sv.config.GetString("server", "host")
sv.info, _ = sv.config.GetString("server", "info")
sv.motd, _ = sv.config.GetString("server", "motd")
sv.packetsTransferred = 0
sv.connectionsCurrent = 0
sv.connectionsCount = 0
sv.queueLen = 0
return sv
}
func (sv *Server) SetAuthCallback(authCB func(name, pass string) bool) {
sv.authCallback = authCB
}
// Open the listening port and start the main server loop.
func (sv *Server) Run() {
xlog.Info("%s/%s", sv.software, sv.version)
go monitoringRun(sv)
laddr, err := sv.config.GetString("net", "listen")
if err == nil {
go sv.listen(laddr)
}
laddr, err = sv.config.GetString("net", "listen_tls")
if err == nil {
go sv.listenTls(laddr)
}
sv.dispatcher()
}
func (sv *Server) Dispatch(msg *irc.Message) {
sv.queue <- msg
}
func (sv *Server) AddClient(cl Client) {
sv.addq <- cl
}
func (sv *Server) DelClient(cl Client) {
sv.delq <- cl
}
func (sv *Server) listen(laddr string) {
listen, err := net.Listen("tcp", laddr)
if err != nil {
xlog.Fatal(err.Error())
os.Exit(-1)
}
for {
time.Sleep(1 * time.Millisecond)
conn, err := listen.Accept()
if err != nil {
xlog.Error(err.Error())
} else {
NewRemoteClient(sv, conn)
sv.connectionsCount++
}
}
}
func (sv *Server) listenTls(laddr string) {
}
func (sv *Server) dispatcher() {
for {
sv.queueLen = float64(len(sv.queue))
select {
case msg := <-sv.queue:
sv.recvMsg(msg)
sv.packetsTransferred++
case cl := <-sv.addq:
clid := strings.ToLower(cl.Name())
if _, exists := sv.clients[clid]; exists {
cl.Receive(irc.M(sv.host, ERR_NICKNAMEINUSE, cl.Name(), "Nickname is already in use"))
go func() {
time.Sleep(5 * time.Second)
cl.Register(false)
}()
xlog.Info("Client registration failed: '%s' (client exists)", clid)
continue
}
if !sv.authCallback(cl.Name(), cl.Password()) {
cl.Receive(irc.M(sv.host, ERR_PASSWDMISMATCH, cl.Name(), "Password incorrect"))
go func() {
time.Sleep(5 * time.Second)
cl.Register(false)
}()
xlog.Info("Client registration failed: '%s' (wrong password)", clid)
continue
}
sv.clients[clid] = cl
sv.clients[clid] = cl
sv.sendLogon(cl.Name())
sv.connectionsCurrent = float64(len(sv.clients))
cl.Register(true)
xlog.Info("Client registered: '%s'", clid)
xlog.Info("Server has %d client(s)", len(sv.clients))
xlog.Debug("Goroutines running: %d", runtime.NumGoroutine())
case cl := <-sv.delq:
clid := strings.ToLower(cl.Name())
cl.Destroy()
for chname, ch := range sv.chUsers {
if _, exists := ch[clid]; exists {
delete(ch, clid)
sv.sendMsg(irc.M(cl.Name(), "PART", chname, "quit"))
}
}
delete(sv.clients, clid)
sv.connectionsCurrent = float64(len(sv.clients))
xlog.Info("Client deleted: '%s'", clid)
xlog.Info("Server has %d client(s)", len(sv.clients))
xlog.Debug("Goroutines running: %d", runtime.NumGoroutine())
default:
time.Sleep(100 * time.Microsecond)
}
}
}
func (sv *Server) loadConfig() {
cfg, err := conf.ReadConfigFile(sv.configPath)
if err != nil {
xlog.Fatal("Can't read config file (%s)", err.Error())
os.Exit(-1)
}
sv.config = cfg
}
func (sv *Server) recvMsg(msg *irc.Message) {
cmd := msg.Cmd
hook, exists := svCommandHooks[cmd]
if !exists {
sv.sendReply(msg.Pre, ERR_UNKNOWNCOMMAND, cmd, "Unknown command")
return
}
argc := len(msg.Args)
if argc < hook.MinArgs {
sv.sendReply(msg.Pre, ERR_NEEDMOREPARAMS, cmd, "Not enough parameters")
return
}
if hook.NeedTrail && msg.Trail == "" {
sv.sendReply(msg.Pre, ERR_NEEDMOREPARAMS, cmd, "Not enough parameters")
return
}
hook.HookFn(sv, msg)
}
func (sv *Server) sendMsg(msg *irc.Message) {
if strings.HasPrefix(msg.Args[0], "#") {
chid := strings.ToLower(msg.Args[0])
if _, exists := sv.chUsers[chid]; !exists {
sv.sendReply(msg.Pre, ERR_NOSUCHNICK, msg.Args[0], "No such nick/channel")
return
}
for clid, _ := range sv.chUsers[chid] {
if strings.ToLower(msg.Pre) == clid && msg.Cmd == "PRIVMSG" {
continue
}
if cl, exists := sv.clients[clid]; exists {
cl.Receive(msg)
}
}
} else {
clid := strings.ToLower(msg.Args[0])
if _, exists := sv.clients[clid]; !exists {
sv.sendReply(msg.Pre, ERR_NOSUCHNICK, msg.Args[0], "No such nick/channel")
return
}
cl := sv.clients[clid]
cl.Receive(msg)
}
}
func (sv *Server) sendReply(nick, cmd, args, trail string) {
clid := strings.ToLower(nick)
if _, exists := sv.clients[clid]; !exists {
return
}
cl := sv.clients[clid]
if args != "" {
args = nick + " " + args
} else {
args = nick
}
cl.Receive(irc.M(sv.host, cmd, args, trail))
}
func (sv *Server) sendLogon(nick string) {
sv.sendReply(nick, RPL_WELCOME, "", "Willkommen!")
sv.sendReply(nick, RPL_YOURHOST, "",
fmt.Sprintf("Your host is %s, running on %s/%s",
sv.host, sv.software, sv.version))
sv.sendReply(nick, RPL_CREATED, "",
fmt.Sprintf("This server was created %s", sv.created))
sv.sendReply(nick, RPL_MYINFO, "",
fmt.Sprintf(myinfo, sv.host, sv.software, sv.version))
sv.sendReply(nick, RPL_ISUPPORT, "",
isupport+" are supported by this server")
sv.sendReply(nick, RPL_MOTDSTART, "",
fmt.Sprintf("- %s Message of the day -", sv.host))
for _, line := range strings.Split(sv.motd, "\n") {
sv.sendReply(nick, RPL_MOTD, "", fmt.Sprintf("- %s", line))
}
sv.sendReply(nick, RPL_ENDOFMOTD, "", "End of MOTD command")
}
func (sv *Server) channelNames(nick, ch string) {
chid := strings.ToLower(ch)
if _, exists := sv.chUsers[chid]; !exists {
return
}
names := ""
for clid, mode := range sv.chUsers[chid] {
name := sv.clients[clid].Name()
if names != "" {
names += " "
}
names = names + mode + name
}
sv.sendReply(nick, RPL_NAMEREPLY, "= "+ch, names)
sv.sendReply(nick, RPL_ENDOFNAMES, ch, "End of /NAMES list")
}
type commandHook struct {
HookFn func(sv *Server, msg *irc.Message)
MinArgs int
NeedTrail bool
NeedOper bool
NeedAuth bool
}
var svCommandHooks = map[string]commandHook{
"PRIVMSG": {handleCmdPrivmsg, 1, true, false, false},
"JOIN": {handleCmdJoin, 1, false, false, false},
"PART": {handleCmdPart, 1, false, false, false},
"QUIT": {handleCmdQuit, 0, false, false, false},
"MODE": {handleCmdMode, 1, false, false, false},
"TOPIC": {handleCmdTopic, 1, false, false, false},
"NAMES": {handleCmdNames, 1, false, false, false},
"WHOIS": {handleCmdWhois, 0, false, false, false},
"PING": {handleCmdPing, 1, false, false, false},
"REHASH": {handleCmdRehash, 0, false, false, false},
/*
"LIST": {handleCmdList, 0, false, false},
"VERSION": {handleCmdVersion, 0, false, false},
"STATS": {handleCmdStats, 0, false, false},
"TIME": {handleCmdTime, 0, false, false},
"OPER": {handleCmdOper, 1, false, false},
"ADMIN": {handleCmdAdmin, 0, false, false},
"INFO": {handleCmdInfo, 0, false, false},
"WHO": {handleCmdWho, 0, false, false},
"WHOWAS": {handleCmdWhowas, 0, false, false},
"KILL": {handleCmdKill, 0, false, false},
"PONG": {handleCmdPong, 0, false, false},
"ERROR": {handleCmdError, 0, false, false},
"AWAY": {handleCmdAway, 0, false, false},
"RESTART": {handleCmdRestart, 0, false, false},
"SUMMON": {handleCmdSummon, 0, false, false},
"USERS": {handleCmdUsers, 0, false, false},
"USERHOST": {handleCmdUserhost, 0, false, false},
"ISON": {handleCmdIson, 0, false, false},
*/
}
func handleCmdPrivmsg(sv *Server, msg *irc.Message) {
sv.sendMsg(msg)
}
func handleCmdJoin(sv *Server, msg *irc.Message) {
clid := strings.ToLower(msg.Pre)
chid := strings.ToLower(msg.Args[0])
if _, exists := sv.chUsers[chid]; !exists {
sv.chUsers[chid] = make(map[string]string)
sv.chTopics[chid] = ""
sv.chModes[chid] = make(map[string]bool)
}
if _, exists := sv.chUsers[chid][clid]; exists {
return
}
sv.chUsers[chid][clid] = ""
sv.sendMsg(msg)
sv.sendReply(msg.Pre, RPL_TOPIC, msg.Args[0], sv.chTopics[msg.Args[0]])
sv.channelNames(msg.Pre, msg.Args[0])
}
func handleCmdPart(sv *Server, msg *irc.Message) {
clid := strings.ToLower(msg.Pre)
chid := strings.ToLower(msg.Args[0])
if _, exists := sv.chUsers[chid]; !exists {
return
}
if _, exists := sv.chUsers[chid][clid]; !exists {
return
}
sv.sendMsg(msg)
delete(sv.chUsers[chid], clid)
}
func handleCmdQuit(sv *Server, msg *irc.Message) {
}
func handleCmdMode(sv *Server, msg *irc.Message) {
if strings.HasPrefix(msg.Args[0], "#") {
chid := strings.ToLower(msg.Args[0])
if _, exists := sv.chUsers[chid]; !exists {
return
}
if len(msg.Args) < 2 {
return
}
modeFlag := strings.ToLower(msg.Args[1])
if len(msg.Args) < 3 {
//modeTar := ""
} else {
//modeTar := strings.ToLower(msg.Args[2])
}
switch modeFlag {
case "+o":
case "-o":
case "+h":
case "-h":
case "+b":
case "-b":
case "+v":
case "-v":
}
sv.sendMsg(msg)
}
}
func handleCmdTopic(sv *Server, msg *irc.Message) {
ch := msg.Args[0]
if _, exists := sv.chUsers[ch]; !exists {
sv.sendReply(msg.Pre, ERR_NOSUCHCHANNEL, ch, "No such channel")
}
if msg.Trail == "" {
sv.sendReply(msg.Pre, RPL_TOPIC, ch, sv.chTopics[ch])
} else {
sv.chTopics[ch] = msg.Trail
sv.sendMsg(msg)
//sv.sendReply(msg.Pre, RPL_TOPIC, ch, msg.Trail)
}
}
func handleCmdNames(sv *Server, msg *irc.Message) {
ch := msg.Args[0]
if _, exists := sv.chUsers[ch]; !exists {
sv.sendReply(msg.Pre, ERR_NOSUCHCHANNEL, ch, "No such channel")
}
sv.channelNames(msg.Pre, ch)
}
func handleCmdWhois(sv *Server, msg *irc.Message) {
sv.sendReply(msg.Pre, RPL_WHOISUSER, "nick user host *", "real name")
}
func handleCmdPing(sv *Server, msg *irc.Message) {
sv.sendReply(msg.Pre, "PONG", msg.Args[0], "")
}
func handleCmdRehash(sv *Server, msg *irc.Message) {
sv.loadConfig()
sv.sendReply(msg.Pre, RPL_REHASHING, "", "Rehashing.")
xlog.Info("Rehashing")
}