"regexp"
"sort"
"strings"
+ "sync"
"time"
)
const (
- // Max time deadline for client's unresponsiveness
+ // Max deadline time of client's unresponsiveness
PingTimeout = time.Second * 180
// Max idle client's time before PING are sent
PingThreshold = time.Second * 90
- // Client's aliveness check period
- AlivenessCheck = time.Second * 10
)
var (
RENickname = regexp.MustCompile("^[a-zA-Z0-9-]{1,24}$")
-)
-type Daemon struct {
- Verbose bool
- version string
- hostname *string
- motd *string
- passwords *string
- clients map[*Client]struct{}
- clientAliveness map[*Client]*ClientAlivenessState
- rooms map[string]*Room
- roomSinks map[*Room]chan ClientEvent
- lastAlivenessCheck time.Time
- logSink chan<- LogEvent
- stateSink chan<- StateEvent
-}
+ roomsGroup sync.WaitGroup
-func NewDaemon(version string, hostname, motd, passwords *string, logSink chan<- LogEvent, stateSink chan<- StateEvent) *Daemon {
- daemon := Daemon{
- version: version,
- hostname: hostname,
- motd: motd,
- passwords: passwords,
- }
- daemon.clients = make(map[*Client]struct{})
- daemon.clientAliveness = make(map[*Client]*ClientAlivenessState)
- daemon.rooms = make(map[string]*Room)
- daemon.roomSinks = make(map[*Room]chan ClientEvent)
- daemon.logSink = logSink
- daemon.stateSink = stateSink
- return &daemon
-}
+ clients map[*Client]struct{} = make(map[*Client]struct{})
+)
-func (daemon *Daemon) SendLusers(client *Client) {
+func SendLusers(client *Client) {
lusers := 0
- for client := range daemon.clients {
+ for client := range clients {
if client.registered {
lusers++
}
client.ReplyNicknamed("251", fmt.Sprintf("There are %d users and 0 invisible on 1 servers", lusers))
}
-func (daemon *Daemon) SendMotd(client *Client) {
- if daemon.motd == nil || *daemon.motd == "" {
+func SendMotd(client *Client) {
+ if motd == nil {
client.ReplyNicknamed("422", "MOTD File is missing")
return
}
-
- motd, err := ioutil.ReadFile(*daemon.motd)
+ motdText, err := ioutil.ReadFile(*motd)
if err != nil {
- log.Printf("Can not read motd file %s: %v", *daemon.motd, err)
+ log.Printf("Can not read motd file %s: %v", *motd, err)
client.ReplyNicknamed("422", "Error reading MOTD File")
return
}
-
- client.ReplyNicknamed("375", "- "+*daemon.hostname+" Message of the day -")
- for _, s := range strings.Split(strings.Trim(string(motd), "\n"), "\n") {
- client.ReplyNicknamed("372", "- "+string(s))
+ client.ReplyNicknamed("375", "- "+*hostname+" Message of the day -")
+ for _, s := range strings.Split(strings.Trim(string(motdText), "\n"), "\n") {
+ client.ReplyNicknamed("372", "- "+s)
}
client.ReplyNicknamed("376", "End of /MOTD command")
}
-func (daemon *Daemon) SendWhois(client *Client, nicknames []string) {
+func SendWhois(client *Client, nicknames []string) {
+ var c *Client
+ var hostPort string
+ var err error
+ var subscriptions []string
+ var room *Room
+ var subscriber *Client
for _, nickname := range nicknames {
nickname = strings.ToLower(nickname)
- found := false
- for c := range daemon.clients {
- if strings.ToLower(c.nickname) != nickname {
- continue
- }
- found = true
- h := c.conn.RemoteAddr().String()
- h, _, err := net.SplitHostPort(h)
- if err != nil {
- log.Printf("Can't parse RemoteAddr %q: %v", h, err)
- h = "Unknown"
- }
- client.ReplyNicknamed("311", c.nickname, c.username, h, "*", c.realname)
- client.ReplyNicknamed("312", c.nickname, *daemon.hostname, *daemon.hostname)
- if c.away != nil {
- client.ReplyNicknamed("301", c.nickname, *c.away)
+ for c = range clients {
+ if strings.ToLower(*c.nickname) == nickname {
+ goto Found
}
- subscriptions := []string{}
- for _, room := range daemon.rooms {
- for subscriber := range room.members {
- if subscriber.nickname == nickname {
- subscriptions = append(subscriptions, room.name)
- }
+ }
+ client.ReplyNoNickChan(nickname)
+ continue
+ Found:
+ hostPort, _, err = net.SplitHostPort(c.conn.RemoteAddr().String())
+ if err != nil {
+ log.Printf("Can't parse RemoteAddr %q: %v", hostPort, err)
+ hostPort = "Unknown"
+ }
+ client.ReplyNicknamed("311", *c.nickname, *c.username, hostPort, "*", *c.realname)
+ client.ReplyNicknamed("312", *c.nickname, *hostname, *hostname)
+ if c.away != nil {
+ client.ReplyNicknamed("301", *c.nickname, *c.away)
+ }
+ subscriptions = make([]string, 0)
+ for _, room = range rooms {
+ for subscriber = range room.members {
+ if *subscriber.nickname == nickname {
+ subscriptions = append(subscriptions, *room.name)
}
}
- sort.Strings(subscriptions)
- client.ReplyNicknamed("319", c.nickname, strings.Join(subscriptions, " "))
- client.ReplyNicknamed("318", c.nickname, "End of /WHOIS list")
- }
- if !found {
- client.ReplyNoNickChan(nickname)
}
+ sort.Strings(subscriptions)
+ client.ReplyNicknamed("319", *c.nickname, strings.Join(subscriptions, " "))
+ client.ReplyNicknamed("318", *c.nickname, "End of /WHOIS list")
}
}
-func (daemon *Daemon) SendList(client *Client, cols []string) {
- var rooms []string
+func SendList(client *Client, cols []string) {
+ var rs []string
+ var r string
if (len(cols) > 1) && (cols[1] != "") {
- rooms = strings.Split(strings.Split(cols[1], " ")[0], ",")
+ rs = strings.Split(strings.Split(cols[1], " ")[0], ",")
} else {
- rooms = []string{}
- for room := range daemon.rooms {
- rooms = append(rooms, room)
+ rs = make([]string, 0)
+ for r = range rooms {
+ rs = append(rs, r)
}
}
- sort.Strings(rooms)
- for _, room := range rooms {
- r, found := daemon.rooms[room]
- if found {
- client.ReplyNicknamed("322", room, fmt.Sprintf("%d", len(r.members)), r.topic)
+ sort.Strings(rs)
+ var room *Room
+ var found bool
+ for _, r = range rs {
+ if room, found = rooms[r]; found {
+ client.ReplyNicknamed(
+ "322",
+ r,
+ fmt.Sprintf("%d", len(room.members)),
+ *room.topic,
+ )
}
}
client.ReplyNicknamed("323", "End of /LIST")
// * only QUIT, NICK and USER commands are processed
// * other commands are quietly ignored
// When client finishes NICK/USER workflow, then MOTD and LUSERS are send to him.
-func (daemon *Daemon) ClientRegister(client *Client, command string, cols []string) {
- switch command {
+func ClientRegister(client *Client, cmd string, cols []string) {
+ switch cmd {
case "PASS":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("PASS")
return
}
- client.password = cols[1]
+ client.password = &cols[1]
case "NICK":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyParts("431", "No nickname given")
nickname := cols[1]
// Compatibility with some clients prepending colons to nickname
nickname = strings.TrimPrefix(nickname, ":")
- for existingClient := range daemon.clients {
- if existingClient.nickname == nickname {
+ for existingClient := range clients {
+ if *existingClient.nickname == nickname {
client.ReplyParts("433", "*", nickname, "Nickname is already in use")
return
}
client.ReplyParts("432", "*", cols[1], "Erroneous nickname")
return
}
- client.nickname = nickname
+ client.nickname = &nickname
case "USER":
if len(cols) == 1 {
client.ReplyNotEnoughParameters("USER")
client.ReplyNotEnoughParameters("USER")
return
}
- client.username = args[0]
- client.realname = strings.TrimLeft(args[3], ":")
+ client.username = &args[0]
+ realname := strings.TrimLeft(args[3], ":")
+ client.realname = &realname
}
- if client.nickname != "*" && client.username != "" {
- if daemon.passwords != nil && *daemon.passwords != "" {
- if client.password == "" {
+ if *client.nickname != "*" && *client.username != "" {
+ if passwords != nil && *passwords != "" {
+ if client.password == nil {
client.ReplyParts("462", "You may not register")
- client.conn.Close()
+ client.Close()
return
}
- contents, err := ioutil.ReadFile(*daemon.passwords)
+ contents, err := ioutil.ReadFile(*passwords)
if err != nil {
- log.Fatalf("Can no read passwords file %s: %s", *daemon.passwords, err)
+ log.Fatalf("Can no read passwords file %s: %s", *passwords, err)
return
}
for _, entry := range strings.Split(string(contents), "\n") {
if entry == "" {
continue
}
- if lp := strings.Split(entry, ":"); lp[0] == client.nickname && lp[1] != client.password {
+ if lp := strings.Split(entry, ":"); lp[0] == *client.nickname && lp[1] != *client.password {
client.ReplyParts("462", "You may not register")
- client.conn.Close()
+ client.Close()
return
}
}
}
-
client.registered = true
client.ReplyNicknamed("001", "Hi, welcome to IRC")
- client.ReplyNicknamed("002", "Your host is "+*daemon.hostname+", running goircd "+daemon.version)
+ client.ReplyNicknamed("002", "Your host is "+*hostname+", running goircd "+version)
client.ReplyNicknamed("003", "This server was created sometime")
- client.ReplyNicknamed("004", *daemon.hostname+" goircd o o")
- daemon.SendLusers(client)
- daemon.SendMotd(client)
+ client.ReplyNicknamed("004", *hostname+" goircd o o")
+ SendLusers(client)
+ SendMotd(client)
log.Println(client, "logged in")
}
}
// Register new room in Daemon. Create an object, events sink, save pointers
// to corresponding daemon's places and start room's processor goroutine.
-func (daemon *Daemon) RoomRegister(name string) (*Room, chan<- ClientEvent) {
- roomNew := NewRoom(daemon.hostname, name, daemon.logSink, daemon.stateSink)
- roomNew.Verbose = daemon.Verbose
+func RoomRegister(name string) (*Room, chan ClientEvent) {
+ roomNew := NewRoom(name)
roomSink := make(chan ClientEvent)
- daemon.rooms[name] = roomNew
- daemon.roomSinks[roomNew] = roomSink
+ rooms[name] = roomNew
+ roomSinks[roomNew] = roomSink
go roomNew.Processor(roomSink)
+ roomsGroup.Add(1)
return roomNew, roomSink
}
-func (daemon *Daemon) HandlerJoin(client *Client, cmd string) {
+func HandlerJoin(client *Client, cmd string) {
args := strings.Split(cmd, " ")
- rooms := strings.Split(args[0], ",")
+ rs := strings.Split(args[0], ",")
var keys []string
if len(args) > 1 {
keys = strings.Split(args[1], ",")
} else {
- keys = []string{}
+ keys = make([]string, 0)
}
- for n, room := range rooms {
+ var roomExisting *Room
+ var roomSink chan ClientEvent
+ var roomNew *Room
+ for n, room := range rs {
if !RoomNameValid(room) {
client.ReplyNoChannel(room)
continue
} else {
key = ""
}
- denied := false
- joined := false
- for roomExisting, roomSink := range daemon.roomSinks {
- if room == roomExisting.name {
- if (roomExisting.key != "") && (roomExisting.key != key) {
- denied = true
- } else {
- roomSink <- ClientEvent{client, EventNew, ""}
- joined = true
+ for roomExisting, roomSink = range roomSinks {
+ if room == *roomExisting.name {
+ if (roomExisting.key != nil) && (*roomExisting.key != key) {
+ goto Denied
}
- break
+ roomSink <- ClientEvent{client, EventNew, ""}
+ goto Joined
}
}
- if denied {
- client.ReplyNicknamed("475", room, "Cannot join channel (+k) - bad key")
- }
- if denied || joined {
- continue
- }
- roomNew, roomSink := daemon.RoomRegister(room)
+ roomNew, roomSink = RoomRegister(room)
log.Println("Room", roomNew, "created")
if key != "" {
- roomNew.key = key
+ roomNew.key = &key
roomNew.StateSave()
}
roomSink <- ClientEvent{client, EventNew, ""}
+ continue
+ Denied:
+ client.ReplyNicknamed("475", room, "Cannot join channel (+k) - bad key")
+ Joined:
}
}
-func (daemon *Daemon) Processor(events <-chan ClientEvent) {
+func Processor(events chan ClientEvent, finished chan struct{}) {
var now time.Time
+ go func() {
+ for {
+ time.Sleep(10 * time.Second)
+ events <- ClientEvent{eventType: EventTick}
+ }
+ }()
for event := range events {
now = time.Now()
client := event.client
-
- // Check for clients aliveness
- if daemon.lastAlivenessCheck.Add(AlivenessCheck).Before(now) {
- for c := range daemon.clients {
- aliveness, alive := daemon.clientAliveness[c]
- if !alive {
- continue
- }
- if aliveness.timestamp.Add(PingTimeout).Before(now) {
+ switch event.eventType {
+ case EventTick:
+ for c := range clients {
+ if c.recvTimestamp.Add(PingTimeout).Before(now) {
log.Println(c, "ping timeout")
- c.conn.Close()
+ c.Close()
continue
}
- if !aliveness.pingSent && aliveness.timestamp.Add(PingThreshold).Before(now) {
+ if c.sendTimestamp.Add(PingThreshold).Before(now) {
if c.registered {
- c.Msg("PING :" + *daemon.hostname)
- aliveness.pingSent = true
+ c.Msg("PING :" + *hostname)
+ c.sendTimestamp = time.Now()
} else {
log.Println(c, "ping timeout")
- c.conn.Close()
+ c.Close()
}
}
}
- daemon.lastAlivenessCheck = now
- }
-
- switch event.eventType {
- case EventNew:
- daemon.clients[client] = struct{}{}
- daemon.clientAliveness[client] = &ClientAlivenessState{
- pingSent: false,
- timestamp: now,
+ case EventTerm:
+ for _, sink := range roomSinks {
+ sink <- ClientEvent{eventType: EventTerm}
}
+ roomsGroup.Wait()
+ close(finished)
+ return
+ case EventNew:
+ clients[client] = struct{}{}
case EventDel:
- delete(daemon.clients, client)
- delete(daemon.clientAliveness, client)
- for _, roomSink := range daemon.roomSinks {
+ delete(clients, client)
+ for _, roomSink := range roomSinks {
roomSink <- event
}
case EventMsg:
cols := strings.SplitN(event.text, " ", 2)
- command := strings.ToUpper(cols[0])
- if daemon.Verbose {
- log.Println(client, "command", command)
+ cmd := strings.ToUpper(cols[0])
+ if *verbose {
+ log.Println(client, "command", cmd)
}
- if command == "QUIT" {
+ if cmd == "QUIT" {
log.Println(client, "quit")
- delete(daemon.clients, client)
- delete(daemon.clientAliveness, client)
- client.conn.Close()
+ client.Close()
continue
}
if !client.registered {
- daemon.ClientRegister(client, command, cols)
+ ClientRegister(client, cmd, cols)
continue
}
- switch command {
+ switch cmd {
case "AWAY":
if len(cols) == 1 {
client.away = nil
client.ReplyNotEnoughParameters("JOIN")
continue
}
- daemon.HandlerJoin(client, cols[1])
+ HandlerJoin(client, cols[1])
case "LIST":
- daemon.SendList(client, cols)
+ SendList(client, cols)
case "LUSERS":
- daemon.SendLusers(client)
+ SendLusers(client)
case "MODE":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("MODE")
continue
}
cols = strings.SplitN(cols[1], " ", 2)
- if cols[0] == client.username {
+ if cols[0] == *client.username {
if len(cols) == 1 {
- client.Msg("221 " + client.nickname + " +")
+ client.Msg("221 " + *client.nickname + " +")
} else {
client.ReplyNicknamed("501", "Unknown MODE flag")
}
continue
}
room := cols[0]
- r, found := daemon.rooms[room]
+ r, found := rooms[room]
if !found {
client.ReplyNoChannel(room)
continue
}
if len(cols) == 1 {
- daemon.roomSinks[r] <- ClientEvent{client, EventMode, ""}
+ roomSinks[r] <- ClientEvent{client, EventMode, ""}
} else {
- daemon.roomSinks[r] <- ClientEvent{client, EventMode, cols[1]}
+ roomSinks[r] <- ClientEvent{client, EventMode, cols[1]}
}
case "MOTD":
- go daemon.SendMotd(client)
+ SendMotd(client)
case "PART":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("PART")
continue
}
- rooms := strings.Split(cols[1], " ")[0]
- for _, room := range strings.Split(rooms, ",") {
- r, found := daemon.rooms[room]
- if !found {
+ rs := strings.Split(cols[1], " ")[0]
+ for _, room := range strings.Split(rs, ",") {
+ if r, found := rooms[room]; found {
+ roomSinks[r] <- ClientEvent{client, EventDel, ""}
+ } else {
client.ReplyNoChannel(room)
continue
}
- daemon.roomSinks[r] <- ClientEvent{client, EventDel, ""}
}
case "PING":
if len(cols) == 1 {
client.ReplyNicknamed("409", "No origin specified")
continue
}
- client.Reply(fmt.Sprintf("PONG %s :%s", *daemon.hostname, cols[1]))
+ client.Reply(fmt.Sprintf("PONG %s :%s", *hostname, cols[1]))
case "PONG":
continue
case "NOTICE", "PRIVMSG":
if len(cols) == 1 {
- client.ReplyNicknamed("411", "No recipient given ("+command+")")
+ client.ReplyNicknamed("411", "No recipient given ("+cmd+")")
continue
}
cols = strings.SplitN(cols[1], " ", 2)
}
msg := ""
target := strings.ToLower(cols[0])
- for c := range daemon.clients {
- if c.nickname == target {
- msg = fmt.Sprintf(":%s %s %s %s", client, command, c.nickname, cols[1])
+ for c := range clients {
+ if *c.nickname == target {
+ msg = fmt.Sprintf(":%s %s %s %s", client, cmd, *c.nickname, cols[1])
c.Msg(msg)
if c.away != nil {
- client.ReplyNicknamed("301", c.nickname, *c.away)
+ client.ReplyNicknamed("301", *c.nickname, *c.away)
}
break
}
if msg != "" {
continue
}
- r, found := daemon.rooms[target]
- if !found {
+ if r, found := rooms[target]; found {
+ roomSinks[r] <- ClientEvent{
+ client,
+ EventMsg,
+ cmd + " " + strings.TrimLeft(cols[1], ":"),
+ }
+ } else {
client.ReplyNoNickChan(target)
- continue
- }
- daemon.roomSinks[r] <- ClientEvent{
- client,
- EventMsg,
- command + " " + strings.TrimLeft(cols[1], ":"),
}
case "TOPIC":
if len(cols) == 1 {
continue
}
cols = strings.SplitN(cols[1], " ", 2)
- r, found := daemon.rooms[cols[0]]
+ r, found := rooms[cols[0]]
if !found {
client.ReplyNoChannel(cols[0])
continue
} else {
change = ""
}
- daemon.roomSinks[r] <- ClientEvent{client, EventTopic, change}
+ roomSinks[r] <- ClientEvent{client, EventTopic, change}
case "WHO":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("WHO")
continue
}
room := strings.Split(cols[1], " ")[0]
- r, found := daemon.rooms[room]
- if !found {
+ if r, found := rooms[room]; found {
+ roomSinks[r] <- ClientEvent{client, EventWho, ""}
+ } else {
client.ReplyNoChannel(room)
- continue
}
- daemon.roomSinks[r] <- ClientEvent{client, EventWho, ""}
case "WHOIS":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("WHOIS")
}
cols := strings.Split(cols[1], " ")
nicknames := strings.Split(cols[len(cols)-1], ",")
- daemon.SendWhois(client, nicknames)
+ SendWhois(client, nicknames)
case "VERSION":
var debug string
- if daemon.Verbose {
+ if *verbose {
debug = "debug"
} else {
debug = ""
}
- client.ReplyNicknamed("351", fmt.Sprintf("%s.%s %s :", daemon.version, debug, *daemon.hostname))
+ client.ReplyNicknamed("351", fmt.Sprintf("%s.%s %s :", version, debug, *hostname))
default:
- client.ReplyNicknamed("421", command, "Unknown command")
+ client.ReplyNicknamed("421", cmd, "Unknown command")
}
}
- if aliveness, alive := daemon.clientAliveness[client]; alive {
- aliveness.timestamp = now
- aliveness.pingSent = false
+ if client != nil {
+ client.recvTimestamp = now
}
}
}