mirror of
https://github.com/ergochat/ergo.git
synced 2024-11-14 07:59:31 +01:00
754 lines
15 KiB
Go
754 lines
15 KiB
Go
package irc
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import (
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"bufio"
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"database/sql"
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"fmt"
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"log"
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"net"
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"os"
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"os/signal"
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"runtime"
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"runtime/debug"
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"runtime/pprof"
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"strings"
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"syscall"
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"time"
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)
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type ServerCommand interface {
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Command
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HandleServer(*Server)
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}
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type RegServerCommand interface {
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Command
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HandleRegServer(*Server)
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}
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type Server struct {
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channels ChannelNameMap
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clients *ClientLookupSet
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commands chan Command
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ctime time.Time
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db *sql.DB
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idle chan *Client
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motdFile string
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name Name
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newConns chan net.Conn
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operators map[Name][]byte
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password []byte
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signals chan os.Signal
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whoWas *WhoWasList
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theaters map[Name][]byte
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}
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var (
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SERVER_SIGNALS = []os.Signal{syscall.SIGINT, syscall.SIGHUP,
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syscall.SIGTERM, syscall.SIGQUIT}
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)
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func NewServer(config *Config) *Server {
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server := &Server{
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channels: make(ChannelNameMap),
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clients: NewClientLookupSet(),
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commands: make(chan Command),
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ctime: time.Now(),
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db: OpenDB(config.Server.Database),
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idle: make(chan *Client),
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motdFile: config.Server.MOTD,
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name: NewName(config.Server.Name),
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newConns: make(chan net.Conn),
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operators: config.Operators(),
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signals: make(chan os.Signal, len(SERVER_SIGNALS)),
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whoWas: NewWhoWasList(100),
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theaters: config.Theaters(),
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}
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if config.Server.Password != "" {
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server.password = config.Server.PasswordBytes()
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}
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server.loadChannels()
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for _, addr := range config.Server.Listen {
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server.listen(addr)
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}
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signal.Notify(server.signals, SERVER_SIGNALS...)
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return server
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}
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func loadChannelList(channel *Channel, list string, maskMode ChannelMode) {
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if list == "" {
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return
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}
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channel.lists[maskMode].AddAll(NewNames(strings.Split(list, " ")))
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}
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func (server *Server) loadChannels() {
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rows, err := server.db.Query(`
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SELECT name, flags, key, topic, user_limit, ban_list, except_list,
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invite_list
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FROM channel`)
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if err != nil {
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log.Fatal("error loading channels: ", err)
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}
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for rows.Next() {
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var name, flags, key, topic string
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var userLimit uint64
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var banList, exceptList, inviteList string
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err = rows.Scan(&name, &flags, &key, &topic, &userLimit, &banList,
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&exceptList, &inviteList)
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if err != nil {
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log.Println("Server.loadChannels:", err)
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continue
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}
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channel := NewChannel(server, NewName(name))
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for _, flag := range flags {
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channel.flags[ChannelMode(flag)] = true
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}
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channel.key = NewText(key)
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channel.topic = NewText(topic)
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channel.userLimit = userLimit
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loadChannelList(channel, banList, BanMask)
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loadChannelList(channel, exceptList, ExceptMask)
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loadChannelList(channel, inviteList, InviteMask)
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}
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}
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func (server *Server) processCommand(cmd Command) {
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client := cmd.Client()
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Log.debug.Printf("%s → %s %s", client, server, cmd)
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if !client.registered {
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regCmd, ok := cmd.(RegServerCommand)
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if !ok {
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client.Quit("unexpected command")
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return
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}
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regCmd.HandleRegServer(server)
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return
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}
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srvCmd, ok := cmd.(ServerCommand)
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if !ok {
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client.ErrUnknownCommand(cmd.Code())
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return
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}
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switch srvCmd.(type) {
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case *PingCommand, *PongCommand:
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client.Touch()
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case *QuitCommand:
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// no-op
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default:
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client.Active()
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client.Touch()
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}
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srvCmd.HandleServer(server)
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}
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func (server *Server) Shutdown() {
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server.db.Close()
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for _, client := range server.clients.byNick {
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client.Reply(RplNotice(server, client, "shutting down"))
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}
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}
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func (server *Server) Run() {
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done := false
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for !done {
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select {
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case <-server.signals:
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server.Shutdown()
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done = true
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case conn := <-server.newConns:
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NewClient(server, conn)
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case cmd := <-server.commands:
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server.processCommand(cmd)
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case client := <-server.idle:
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client.Idle()
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}
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}
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}
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//
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// listen goroutine
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//
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func (s *Server) listen(addr string) {
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listener, err := net.Listen("tcp", addr)
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if err != nil {
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log.Fatal(s, "listen error: ", err)
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}
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Log.info.Printf("%s listening on %s", s, addr)
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go func() {
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for {
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conn, err := listener.Accept()
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if err != nil {
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Log.error.Printf("%s accept error: %s", s, err)
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continue
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}
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Log.debug.Printf("%s accept: %s", s, conn.RemoteAddr())
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s.newConns <- conn
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}
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}()
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}
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//
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// server functionality
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//
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func (s *Server) tryRegister(c *Client) {
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if c.registered || !c.HasNick() || !c.HasUsername() ||
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(c.capState == CapNegotiating) {
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return
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}
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c.Register()
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c.RplWelcome()
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c.RplYourHost()
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c.RplCreated()
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c.RplMyInfo()
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s.MOTD(c)
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}
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func (server *Server) MOTD(client *Client) {
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if server.motdFile == "" {
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client.ErrNoMOTD()
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return
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}
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file, err := os.Open(server.motdFile)
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if err != nil {
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client.ErrNoMOTD()
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return
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}
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defer file.Close()
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client.RplMOTDStart()
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reader := bufio.NewReader(file)
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for {
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line, err := reader.ReadString('\n')
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if err != nil {
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break
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}
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line = strings.TrimRight(line, "\r\n")
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if len(line) > 80 {
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for len(line) > 80 {
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client.RplMOTD(line[0:80])
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line = line[80:]
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}
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if len(line) > 0 {
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client.RplMOTD(line)
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}
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} else {
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client.RplMOTD(line)
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}
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}
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client.RplMOTDEnd()
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}
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func (s *Server) Id() Name {
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return s.name
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}
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func (s *Server) String() string {
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return s.name.String()
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}
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func (s *Server) Nick() Name {
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return s.Id()
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}
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//
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// registration commands
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//
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func (msg *PassCommand) HandleRegServer(server *Server) {
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client := msg.Client()
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if msg.err != nil {
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client.ErrPasswdMismatch()
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client.Quit("bad password")
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return
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}
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client.authorized = true
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}
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func (msg *ProxyCommand) HandleRegServer(server *Server) {
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msg.Client().hostname = msg.hostname
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}
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func (msg *RFC1459UserCommand) HandleRegServer(server *Server) {
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client := msg.Client()
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if !client.authorized {
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client.ErrPasswdMismatch()
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client.Quit("bad password")
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return
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}
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msg.setUserInfo(server)
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}
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func (msg *RFC2812UserCommand) HandleRegServer(server *Server) {
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client := msg.Client()
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if !client.authorized {
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client.ErrPasswdMismatch()
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client.Quit("bad password")
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return
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}
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flags := msg.Flags()
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if len(flags) > 0 {
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for _, mode := range flags {
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client.flags[mode] = true
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}
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client.RplUModeIs(client)
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}
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msg.setUserInfo(server)
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}
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func (msg *UserCommand) setUserInfo(server *Server) {
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client := msg.Client()
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if client.capState == CapNegotiating {
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client.capState = CapNegotiated
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}
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server.clients.Remove(client)
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client.username, client.realname = msg.username, msg.realname
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server.clients.Add(client)
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server.tryRegister(client)
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}
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func (msg *QuitCommand) HandleRegServer(server *Server) {
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msg.Client().Quit(msg.message)
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}
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//
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// normal commands
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//
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func (m *PassCommand) HandleServer(s *Server) {
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m.Client().ErrAlreadyRegistered()
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}
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func (m *PingCommand) HandleServer(s *Server) {
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m.Client().Reply(RplPong(m.Client()))
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}
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func (m *PongCommand) HandleServer(s *Server) {
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// no-op
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}
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func (m *UserCommand) HandleServer(s *Server) {
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m.Client().ErrAlreadyRegistered()
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}
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func (msg *QuitCommand) HandleServer(server *Server) {
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msg.Client().Quit(msg.message)
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}
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func (m *JoinCommand) HandleServer(s *Server) {
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client := m.Client()
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if m.zero {
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for channel := range client.channels {
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channel.Part(client, client.Nick().Text())
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}
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return
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}
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for name, key := range m.channels {
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if !name.IsChannel() {
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client.ErrNoSuchChannel(name)
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continue
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}
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channel := s.channels.Get(name)
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if channel == nil {
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channel = NewChannel(s, name)
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}
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channel.Join(client, key)
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}
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}
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func (m *PartCommand) HandleServer(server *Server) {
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client := m.Client()
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for _, chname := range m.channels {
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channel := server.channels.Get(chname)
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if channel == nil {
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m.Client().ErrNoSuchChannel(chname)
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continue
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}
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channel.Part(client, m.Message())
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}
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}
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func (msg *TopicCommand) HandleServer(server *Server) {
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client := msg.Client()
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channel := server.channels.Get(msg.channel)
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if channel == nil {
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client.ErrNoSuchChannel(msg.channel)
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return
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}
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if msg.setTopic {
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channel.SetTopic(client, msg.topic)
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} else {
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channel.GetTopic(client)
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}
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}
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func (msg *PrivMsgCommand) HandleServer(server *Server) {
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client := msg.Client()
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if msg.target.IsChannel() {
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channel := server.channels.Get(msg.target)
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if channel == nil {
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client.ErrNoSuchChannel(msg.target)
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return
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}
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channel.PrivMsg(client, msg.message)
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return
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}
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target := server.clients.Get(msg.target)
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if target == nil {
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client.ErrNoSuchNick(msg.target)
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return
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}
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target.Reply(RplPrivMsg(client, target, msg.message))
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if target.flags[Away] {
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client.RplAway(target)
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}
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}
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func (client *Client) WhoisChannelsNames() []string {
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chstrs := make([]string, len(client.channels))
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index := 0
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for channel := range client.channels {
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switch {
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case channel.members[client][ChannelOperator]:
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chstrs[index] = "@" + channel.name.String()
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case channel.members[client][Voice]:
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chstrs[index] = "+" + channel.name.String()
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default:
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chstrs[index] = channel.name.String()
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}
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index += 1
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}
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return chstrs
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}
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func (m *WhoisCommand) HandleServer(server *Server) {
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client := m.Client()
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// TODO implement target query
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for _, mask := range m.masks {
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matches := server.clients.FindAll(mask)
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if len(matches) == 0 {
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client.ErrNoSuchNick(mask)
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continue
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}
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for mclient := range matches {
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client.RplWhois(mclient)
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}
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}
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}
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func whoChannel(client *Client, channel *Channel, friends ClientSet) {
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for member := range channel.members {
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if !client.flags[Invisible] || friends[client] {
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client.RplWhoReply(channel, member)
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}
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}
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}
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func (msg *WhoCommand) HandleServer(server *Server) {
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client := msg.Client()
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friends := client.Friends()
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mask := msg.mask
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if mask == "" {
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for _, channel := range server.channels {
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whoChannel(client, channel, friends)
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}
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} else if mask.IsChannel() {
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// TODO implement wildcard matching
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channel := server.channels.Get(mask)
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if channel != nil {
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whoChannel(client, channel, friends)
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}
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} else {
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for mclient := range server.clients.FindAll(mask) {
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client.RplWhoReply(nil, mclient)
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}
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}
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client.RplEndOfWho(mask)
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}
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func (msg *OperCommand) HandleServer(server *Server) {
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client := msg.Client()
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if (msg.hash == nil) || (msg.err != nil) {
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client.ErrPasswdMismatch()
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return
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}
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client.flags[Operator] = true
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client.RplYoureOper()
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client.RplUModeIs(client)
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}
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func (msg *AwayCommand) HandleServer(server *Server) {
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client := msg.Client()
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if msg.away {
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client.flags[Away] = true
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} else {
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delete(client.flags, Away)
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}
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client.awayMessage = msg.text
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if client.flags[Away] {
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client.RplNowAway()
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} else {
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client.RplUnAway()
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}
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}
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func (msg *IsOnCommand) HandleServer(server *Server) {
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client := msg.Client()
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ison := make([]string, 0)
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for _, nick := range msg.nicks {
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if iclient := server.clients.Get(nick); iclient != nil {
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ison = append(ison, iclient.Nick().String())
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}
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}
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client.RplIsOn(ison)
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}
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func (msg *MOTDCommand) HandleServer(server *Server) {
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server.MOTD(msg.Client())
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}
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func (msg *NoticeCommand) HandleServer(server *Server) {
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client := msg.Client()
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if msg.target.IsChannel() {
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channel := server.channels.Get(msg.target)
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if channel == nil {
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client.ErrNoSuchChannel(msg.target)
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return
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}
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channel.Notice(client, msg.message)
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return
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}
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target := server.clients.Get(msg.target)
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if target == nil {
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client.ErrNoSuchNick(msg.target)
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return
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}
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target.Reply(RplNotice(client, target, msg.message))
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}
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func (msg *KickCommand) HandleServer(server *Server) {
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client := msg.Client()
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for chname, nickname := range msg.kicks {
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channel := server.channels.Get(chname)
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if channel == nil {
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client.ErrNoSuchChannel(chname)
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continue
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}
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target := server.clients.Get(nickname)
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if target == nil {
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client.ErrNoSuchNick(nickname)
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continue
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}
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channel.Kick(client, target, msg.Comment())
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}
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}
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func (msg *ListCommand) HandleServer(server *Server) {
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client := msg.Client()
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// TODO target server
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if msg.target != "" {
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client.ErrNoSuchServer(msg.target)
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return
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}
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if len(msg.channels) == 0 {
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for _, channel := range server.channels {
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if !client.flags[Operator] && channel.flags[Private] {
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continue
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}
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client.RplList(channel)
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}
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} else {
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for _, chname := range msg.channels {
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channel := server.channels.Get(chname)
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if channel == nil || (!client.flags[Operator] && channel.flags[Private]) {
|
|
client.ErrNoSuchChannel(chname)
|
|
continue
|
|
}
|
|
client.RplList(channel)
|
|
}
|
|
}
|
|
client.RplListEnd(server)
|
|
}
|
|
|
|
func (msg *NamesCommand) HandleServer(server *Server) {
|
|
client := msg.Client()
|
|
if len(server.channels) == 0 {
|
|
for _, channel := range server.channels {
|
|
channel.Names(client)
|
|
}
|
|
return
|
|
}
|
|
|
|
for _, chname := range msg.channels {
|
|
channel := server.channels.Get(chname)
|
|
if channel == nil {
|
|
client.ErrNoSuchChannel(chname)
|
|
continue
|
|
}
|
|
channel.Names(client)
|
|
}
|
|
}
|
|
|
|
func (server *Server) Reply(target *Client, format string, args ...interface{}) {
|
|
target.Reply(RplPrivMsg(server, target, NewText(fmt.Sprintf(format, args...))))
|
|
}
|
|
|
|
func (msg *DebugCommand) HandleServer(server *Server) {
|
|
client := msg.Client()
|
|
if !client.flags[Operator] {
|
|
return
|
|
}
|
|
|
|
switch msg.subCommand {
|
|
case "GC":
|
|
runtime.GC()
|
|
server.Reply(client, "OK")
|
|
|
|
case "GCSTATS":
|
|
stats := &debug.GCStats{
|
|
PauseQuantiles: make([]time.Duration, 5),
|
|
}
|
|
server.Reply(client, "last GC: %s", stats.LastGC.Format(time.RFC1123))
|
|
server.Reply(client, "num GC: %d", stats.NumGC)
|
|
server.Reply(client, "pause total: %s", stats.PauseTotal)
|
|
server.Reply(client, "pause quantiles min%%: %s", stats.PauseQuantiles[0])
|
|
server.Reply(client, "pause quantiles 25%%: %s", stats.PauseQuantiles[1])
|
|
server.Reply(client, "pause quantiles 50%%: %s", stats.PauseQuantiles[2])
|
|
server.Reply(client, "pause quantiles 75%%: %s", stats.PauseQuantiles[3])
|
|
server.Reply(client, "pause quantiles max%%: %s", stats.PauseQuantiles[4])
|
|
|
|
case "NUMGOROUTINE":
|
|
count := runtime.NumGoroutine()
|
|
server.Reply(client, "num goroutines: %d", count)
|
|
|
|
case "PROFILEHEAP":
|
|
file, err := os.Create("ergonomadic.heap.prof")
|
|
if err != nil {
|
|
log.Printf("error: %s", err)
|
|
break
|
|
}
|
|
defer file.Close()
|
|
pprof.Lookup("heap").WriteTo(file, 0)
|
|
server.Reply(client, "written to ergonomadic-heap.prof")
|
|
}
|
|
}
|
|
|
|
func (msg *VersionCommand) HandleServer(server *Server) {
|
|
client := msg.Client()
|
|
if (msg.target != "") && (msg.target != server.name) {
|
|
client.ErrNoSuchServer(msg.target)
|
|
return
|
|
}
|
|
|
|
client.RplVersion()
|
|
}
|
|
|
|
func (msg *InviteCommand) HandleServer(server *Server) {
|
|
client := msg.Client()
|
|
|
|
target := server.clients.Get(msg.nickname)
|
|
if target == nil {
|
|
client.ErrNoSuchNick(msg.nickname)
|
|
return
|
|
}
|
|
|
|
channel := server.channels.Get(msg.channel)
|
|
if channel == nil {
|
|
client.RplInviting(target, msg.channel)
|
|
target.Reply(RplInviteMsg(client, target, msg.channel))
|
|
return
|
|
}
|
|
|
|
channel.Invite(target, client)
|
|
}
|
|
|
|
func (msg *TimeCommand) HandleServer(server *Server) {
|
|
client := msg.Client()
|
|
if (msg.target != "") && (msg.target != server.name) {
|
|
client.ErrNoSuchServer(msg.target)
|
|
return
|
|
}
|
|
client.RplTime()
|
|
}
|
|
|
|
func (msg *KillCommand) HandleServer(server *Server) {
|
|
client := msg.Client()
|
|
if !client.flags[Operator] {
|
|
client.ErrNoPrivileges()
|
|
return
|
|
}
|
|
|
|
target := server.clients.Get(msg.nickname)
|
|
if target == nil {
|
|
client.ErrNoSuchNick(msg.nickname)
|
|
return
|
|
}
|
|
|
|
quitMsg := fmt.Sprintf("KILLed by %s: %s", client.Nick(), msg.comment)
|
|
target.Quit(NewText(quitMsg))
|
|
}
|
|
|
|
func (msg *WhoWasCommand) HandleServer(server *Server) {
|
|
client := msg.Client()
|
|
for _, nickname := range msg.nicknames {
|
|
results := server.whoWas.Find(nickname, msg.count)
|
|
if len(results) == 0 {
|
|
client.ErrWasNoSuchNick(nickname)
|
|
} else {
|
|
for _, whoWas := range results {
|
|
client.RplWhoWasUser(whoWas)
|
|
}
|
|
}
|
|
client.RplEndOfWhoWas(nickname)
|
|
}
|
|
}
|