Various race preventing locks
This commit is contained in:
Sergey Matveev
User Mue
parent
5ca748d928
commit
51766fc90d
@ -52,7 +52,7 @@ type Client struct {
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sync.Mutex
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}
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func (c Client) Host() string {
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func (c *Client) Host() string {
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addr := c.conn.RemoteAddr().String()
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if host, _, err := net.SplitHostPort(addr); err == nil {
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addr = host
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@ -63,7 +63,7 @@ func (c Client) Host() string {
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return addr
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}
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func (c Client) String() string {
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func (c *Client) String() string {
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return *c.nickname + "!" + *c.username + "@" + c.Host()
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}
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56
daemon.go
56
daemon.go
@ -40,18 +40,23 @@ const (
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var (
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RENickname = regexp.MustCompile("^[a-zA-Z0-9-]{1,24}$")
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clients map[*Client]struct{} = make(map[*Client]struct{})
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clientsM sync.RWMutex
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rooms map[string]*Room = make(map[string]*Room)
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roomsM sync.RWMutex
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roomsGroup sync.WaitGroup
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clients map[*Client]struct{} = make(map[*Client]struct{})
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roomSinks map[*Room]chan ClientEvent = make(map[*Room]chan ClientEvent)
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)
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func SendLusers(client *Client) {
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lusers := 0
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clientsM.RLock()
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for client := range clients {
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if client.registered {
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lusers++
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}
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}
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clientsM.RUnlock()
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client.ReplyNicknamed("251", fmt.Sprintf("There are %d users and 0 invisible on 1 servers", lusers))
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}
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@ -82,11 +87,14 @@ func SendWhois(client *Client, nicknames []string) {
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var subscriber *Client
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for _, nickname := range nicknames {
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nickname = strings.ToLower(nickname)
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clientsM.RLock()
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for c = range clients {
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if strings.ToLower(*c.nickname) == nickname {
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clientsM.RUnlock()
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goto Found
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}
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}
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clientsM.RUnlock()
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client.ReplyNoNickChan(nickname)
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continue
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Found:
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@ -101,6 +109,7 @@ func SendWhois(client *Client, nicknames []string) {
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client.ReplyNicknamed("301", *c.nickname, *c.away)
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}
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subscriptions = make([]string, 0)
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roomsM.RLock()
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for _, room = range rooms {
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for subscriber = range room.members {
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if *subscriber.nickname == nickname {
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@ -108,6 +117,7 @@ func SendWhois(client *Client, nicknames []string) {
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}
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}
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}
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roomsM.RUnlock()
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sort.Strings(subscriptions)
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client.ReplyNicknamed("319", *c.nickname, strings.Join(subscriptions, " "))
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client.ReplyNicknamed("318", *c.nickname, "End of /WHOIS list")
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@ -121,14 +131,17 @@ func SendList(client *Client, cols []string) {
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rs = strings.Split(strings.Split(cols[1], " ")[0], ",")
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} else {
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rs = make([]string, 0)
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roomsM.RLock()
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for r = range rooms {
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rs = append(rs, r)
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}
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roomsM.RUnlock()
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}
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sort.Strings(rs)
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var room *Room
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var found bool
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for _, r = range rs {
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roomsM.RLock()
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if room, found = rooms[r]; found {
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client.ReplyNicknamed(
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"322",
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@ -137,6 +150,7 @@ func SendList(client *Client, cols []string) {
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*room.topic,
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)
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}
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roomsM.RUnlock()
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}
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client.ReplyNicknamed("323", "End of /LIST")
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}
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@ -163,12 +177,15 @@ func ClientRegister(client *Client, cmd string, cols []string) {
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// Compatibility with some clients prepending colons to nickname
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nickname = strings.TrimPrefix(nickname, ":")
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nickname = strings.ToLower(nickname)
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clientsM.RLock()
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for existingClient := range clients {
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if *existingClient.nickname == nickname {
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clientsM.RUnlock()
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client.ReplyParts("433", "*", nickname, "Nickname is already in use")
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return
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}
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}
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clientsM.RUnlock()
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if !RENickname.MatchString(nickname) {
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client.ReplyParts("432", "*", cols[1], "Erroneous nickname")
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return
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@ -227,8 +244,10 @@ func ClientRegister(client *Client, cmd string, cols []string) {
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func RoomRegister(name string) (*Room, chan ClientEvent) {
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roomNew := NewRoom(name)
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roomSink := make(chan ClientEvent)
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roomsM.Lock()
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rooms[name] = roomNew
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roomSinks[roomNew] = roomSink
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roomsM.Unlock()
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go roomNew.Processor(roomSink)
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roomsGroup.Add(1)
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return roomNew, roomSink
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@ -257,8 +276,10 @@ func HandlerJoin(client *Client, cmd string) {
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} else {
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key = ""
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}
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roomsM.RLock()
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for roomExisting, roomSink = range roomSinks {
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if room == *roomExisting.name {
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roomsM.RUnlock()
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if (*roomExisting.key != "") && (*roomExisting.key != key) {
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goto Denied
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}
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@ -266,6 +287,7 @@ func HandlerJoin(client *Client, cmd string) {
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goto Joined
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}
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}
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roomsM.RUnlock()
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roomNew, roomSink = RoomRegister(room)
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log.Println("Room", roomNew, "created")
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if key != "" {
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@ -293,6 +315,7 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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client := event.client
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switch event.eventType {
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case EventTick:
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clientsM.RLock()
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for c := range clients {
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if c.recvTimestamp.Add(PingTimeout).Before(now) {
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log.Println(c, "ping timeout")
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@ -309,6 +332,8 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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}
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}
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}
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clientsM.RUnlock()
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roomsM.Lock()
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for rn, r := range rooms {
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if *statedir == "" && len(r.members) == 0 {
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log.Println(rn, "emptied room")
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@ -317,20 +342,29 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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delete(roomSinks, r)
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}
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}
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roomsM.Unlock()
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case EventTerm:
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roomsM.RLock()
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for _, sink := range roomSinks {
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sink <- ClientEvent{eventType: EventTerm}
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}
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roomsM.RUnlock()
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roomsGroup.Wait()
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close(finished)
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return
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case EventNew:
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clientsM.Lock()
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clients[client] = struct{}{}
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clientsM.Unlock()
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case EventDel:
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clientsM.Lock()
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delete(clients, client)
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clientsM.Unlock()
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roomsM.RLock()
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for _, roomSink := range roomSinks {
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roomSink <- event
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}
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roomsM.RUnlock()
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case EventMsg:
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cols := strings.SplitN(event.text, " ", 2)
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cmd := strings.ToUpper(cols[0])
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@ -384,9 +418,11 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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continue
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}
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room := cols[0]
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roomsM.RLock()
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r, found := rooms[room]
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if !found {
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client.ReplyNoChannel(room)
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roomsM.RUnlock()
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continue
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}
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if len(cols) == 1 {
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@ -394,6 +430,7 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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} else {
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roomSinks[r] <- ClientEvent{client, EventMode, cols[1]}
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}
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roomsM.RUnlock()
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case "MOTD":
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SendMotd(client)
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case "PART":
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@ -402,14 +439,17 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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continue
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}
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rs := strings.Split(cols[1], " ")[0]
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roomsM.RLock()
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for _, room := range strings.Split(rs, ",") {
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if r, found := rooms[room]; found {
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roomSinks[r] <- ClientEvent{client, EventDel, ""}
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} else {
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roomsM.RUnlock()
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client.ReplyNoChannel(room)
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continue
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}
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}
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roomsM.RUnlock()
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case "PING":
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if len(cols) == 1 {
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client.ReplyNicknamed("409", "No origin specified")
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@ -430,6 +470,7 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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}
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msg := ""
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target := strings.ToLower(cols[0])
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clientsM.RLock()
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for c := range clients {
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if *c.nickname == target {
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msg = fmt.Sprintf(":%s %s %s %s", client, cmd, *c.nickname, cols[1])
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@ -440,9 +481,11 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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break
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}
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}
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clientsM.RUnlock()
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if msg != "" {
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continue
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}
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roomsM.RLock()
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if r, found := rooms[target]; found {
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roomSinks[r] <- ClientEvent{
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client,
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@ -452,13 +495,16 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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} else {
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client.ReplyNoNickChan(target)
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}
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roomsM.RUnlock()
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case "TOPIC":
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if len(cols) == 1 {
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client.ReplyNotEnoughParameters("TOPIC")
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continue
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}
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cols = strings.SplitN(cols[1], " ", 2)
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roomsM.RLock()
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r, found := rooms[cols[0]]
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roomsM.RUnlock()
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if !found {
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client.ReplyNoChannel(cols[0])
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continue
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@ -469,18 +515,22 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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} else {
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change = ""
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}
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roomsM.RLock()
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roomSinks[r] <- ClientEvent{client, EventTopic, change}
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roomsM.RUnlock()
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case "WHO":
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if len(cols) == 1 || len(cols[1]) < 1 {
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client.ReplyNotEnoughParameters("WHO")
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continue
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}
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room := strings.Split(cols[1], " ")[0]
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roomsM.RLock()
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if r, found := rooms[room]; found {
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roomSinks[r] <- ClientEvent{client, EventWho, ""}
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} else {
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client.ReplyNoChannel(room)
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}
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roomsM.RUnlock()
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case "WHOIS":
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if len(cols) == 1 || len(cols[1]) < 1 {
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client.ReplyNotEnoughParameters("WHOIS")
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@ -495,9 +545,11 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
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continue
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}
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nicksKnown := make(map[string]struct{})
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clientsM.RLock()
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for c := range clients {
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nicksKnown[*c.nickname] = struct{}{}
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}
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clientsM.RUnlock()
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var nicksExists []string
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for _, nickname := range strings.Split(cols[1], " ") {
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if _, exists := nicksKnown[nickname]; exists {
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92
room.go
92
room.go
@ -24,14 +24,11 @@ import (
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"regexp"
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"sort"
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"strings"
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"sync"
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)
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var (
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RERoom = regexp.MustCompile("^#[^\x00\x07\x0a\x0d ,:/]{1,200}$")
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rooms map[string]*Room = make(map[string]*Room)
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roomSinks map[*Room]chan ClientEvent = make(map[*Room]chan ClientEvent)
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)
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// Sanitize room's name. It can consist of 1 to 50 ASCII symbols
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@ -45,10 +42,14 @@ type Room struct {
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topic *string
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key *string
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members map[*Client]struct{}
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sync.RWMutex
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}
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func (room Room) String() string {
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return *room.name
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func (room *Room) String() (name string) {
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room.RLock()
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name = *room.name
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room.RUnlock()
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return
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}
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func NewRoom(name string) *Room {
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@ -63,25 +64,31 @@ func NewRoom(name string) *Room {
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}
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func (room *Room) SendTopic(client *Client) {
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room.RLock()
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if *room.topic == "" {
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client.ReplyNicknamed("331", *room.name, "No topic is set")
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client.ReplyNicknamed("331", room.String(), "No topic is set")
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} else {
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client.ReplyNicknamed("332", *room.name, *room.topic)
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client.ReplyNicknamed("332", room.String(), *room.topic)
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}
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room.RUnlock()
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}
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// Send message to all room's subscribers, possibly excluding someone.
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func (room *Room) Broadcast(msg string, clientToIgnore ...*Client) {
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room.RLock()
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for member := range room.members {
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if (len(clientToIgnore) > 0) && member == clientToIgnore[0] {
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continue
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}
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member.Msg(msg)
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}
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room.RUnlock()
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}
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func (room *Room) StateSave() {
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stateSink <- StateEvent{*room.name, *room.topic, *room.key}
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room.RLock()
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stateSink <- StateEvent{room.String(), *room.topic, *room.key}
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room.RUnlock()
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}
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func (room *Room) Processor(events <-chan ClientEvent) {
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@ -93,54 +100,74 @@ func (room *Room) Processor(events <-chan ClientEvent) {
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roomsGroup.Done()
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return
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case EventNew:
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room.Lock()
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room.members[client] = struct{}{}
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if *verbose {
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log.Println(client, "joined", room.name)
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}
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room.Unlock()
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room.SendTopic(client)
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room.Broadcast(fmt.Sprintf(":%s JOIN %s", client, *room.name))
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logSink <- LogEvent{*room.name, *client.nickname, "joined", true}
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room.Broadcast(fmt.Sprintf(":%s JOIN %s", client, room.String()))
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logSink <- LogEvent{room.String(), *client.nickname, "joined", true}
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nicknames := make([]string, 0)
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room.RLock()
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for member := range room.members {
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nicknames = append(nicknames, *member.nickname)
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}
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room.RUnlock()
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sort.Strings(nicknames)
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client.ReplyNicknamed("353", "=", *room.name, strings.Join(nicknames, " "))
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client.ReplyNicknamed("366", *room.name, "End of NAMES list")
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client.ReplyNicknamed("353", "=", room.String(), strings.Join(nicknames, " "))
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client.ReplyNicknamed("366", room.String(), "End of NAMES list")
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case EventDel:
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room.RLock()
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if _, subscribed := room.members[client]; !subscribed {
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client.ReplyNicknamed("442", *room.name, "You are not on that channel")
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client.ReplyNicknamed("442", room.String(), "You are not on that channel")
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room.RUnlock()
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continue
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}
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room.RUnlock()
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room.Lock()
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delete(room.members, client)
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msg := fmt.Sprintf(":%s PART %s :%s", client, *room.name, *client.nickname)
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room.Unlock()
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room.RLock()
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msg := fmt.Sprintf(":%s PART %s :%s", client, room.String(), *client.nickname)
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room.Broadcast(msg)
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logSink <- LogEvent{*room.name, *client.nickname, "left", true}
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logSink <- LogEvent{room.String(), *client.nickname, "left", true}
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room.RUnlock()
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case EventTopic:
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room.RLock()
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if _, subscribed := room.members[client]; !subscribed {
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client.ReplyParts("442", *room.name, "You are not on that channel")
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client.ReplyParts("442", room.String(), "You are not on that channel")
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room.RUnlock()
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continue
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}
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if event.text == "" {
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room.SendTopic(client)
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room.RUnlock()
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continue
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}
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room.RUnlock()
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topic := strings.TrimLeft(event.text, ":")
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room.Lock()
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room.topic = &topic
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msg := fmt.Sprintf(":%s TOPIC %s :%s", client, *room.name, *room.topic)
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room.Unlock()
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room.RLock()
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msg := fmt.Sprintf(":%s TOPIC %s :%s", client, room.String(), *room.topic)
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room.Broadcast(msg)
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logSink <- LogEvent{
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*room.name,
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room.String(),
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*client.nickname,
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"set topic to " + *room.topic,
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true,
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}
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room.RUnlock()
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room.StateSave()
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case EventWho:
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room.RLock()
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for m := range room.members {
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client.ReplyNicknamed(
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"352",
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*room.name,
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room.String(),
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*m.username,
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m.Host(),
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*hostname,
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@ -149,29 +176,36 @@ func (room *Room) Processor(events <-chan ClientEvent) {
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"0 "+*m.realname,
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)
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}
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client.ReplyNicknamed("315", *room.name, "End of /WHO list")
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client.ReplyNicknamed("315", room.String(), "End of /WHO list")
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room.RUnlock()
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case EventMode:
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room.RLock()
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if event.text == "" {
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mode := "+"
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if *room.key != "" {
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mode = mode + "k"
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}
|
||||
client.Msg(fmt.Sprintf("324 %s %s %s", *client.nickname, *room.name, mode))
|
||||
client.Msg(fmt.Sprintf("324 %s %s %s", *client.nickname, room.String(), mode))
|
||||
room.RUnlock()
|
||||
continue
|
||||
}
|
||||
if strings.HasPrefix(event.text, "b") {
|
||||
client.ReplyNicknamed("368", *room.name, "End of channel ban list")
|
||||
client.ReplyNicknamed("368", room.String(), "End of channel ban list")
|
||||
room.RUnlock()
|
||||
continue
|
||||
}
|
||||
if strings.HasPrefix(event.text, "-k") || strings.HasPrefix(event.text, "+k") {
|
||||
if _, subscribed := room.members[client]; !subscribed {
|
||||
client.ReplyParts("442", *room.name, "You are not on that channel")
|
||||
client.ReplyParts("442", room.String(), "You are not on that channel")
|
||||
room.RUnlock()
|
||||
continue
|
||||
}
|
||||
} else {
|
||||
client.ReplyNicknamed("472", event.text, "Unknown MODE flag")
|
||||
room.RUnlock()
|
||||
continue
|
||||
}
|
||||
room.RUnlock()
|
||||
var msg string
|
||||
var msgLog string
|
||||
if strings.HasPrefix(event.text, "+k") {
|
||||
@ -180,17 +214,21 @@ func (room *Room) Processor(events <-chan ClientEvent) {
|
||||
client.ReplyNotEnoughParameters("MODE")
|
||||
continue
|
||||
}
|
||||
room.Lock()
|
||||
room.key = &cols[1]
|
||||
msg = fmt.Sprintf(":%s MODE %s +k %s", client, *room.name, *room.key)
|
||||
msgLog = "set channel key to " + *room.key
|
||||
room.Unlock()
|
||||
} else {
|
||||
key := ""
|
||||
room.Lock()
|
||||
room.key = &key
|
||||
msg = fmt.Sprintf(":%s MODE %s -k", client, *room.name)
|
||||
room.Unlock()
|
||||
msgLog = "removed channel key"
|
||||
}
|
||||
room.Broadcast(msg)
|
||||
logSink <- LogEvent{*room.name, *client.nickname, msgLog, true}
|
||||
logSink <- LogEvent{room.String(), *client.nickname, msgLog, true}
|
||||
room.StateSave()
|
||||
case EventMsg:
|
||||
sep := strings.Index(event.text, " ")
|
||||
@ -198,12 +236,12 @@ func (room *Room) Processor(events <-chan ClientEvent) {
|
||||
":%s %s %s :%s",
|
||||
client,
|
||||
event.text[:sep],
|
||||
*room.name,
|
||||
room.String(),
|
||||
event.text[sep+1:]),
|
||||
client,
|
||||
)
|
||||
logSink <- LogEvent{
|
||||
*room.name,
|
||||
room.String(),
|
||||
*client.nickname,
|
||||
event.text[sep+1:],
|
||||
false,
|
||||
|
||||
10
room_test.go
10
room_test.go
@ -47,9 +47,11 @@ func TestTwoUsers(t *testing.T) {
|
||||
host := "foohost"
|
||||
hostname = &host
|
||||
events := make(chan ClientEvent)
|
||||
roomsM.Lock()
|
||||
rooms = make(map[string]*Room)
|
||||
clients = make(map[*Client]struct{})
|
||||
roomSinks = make(map[*Room]chan ClientEvent)
|
||||
roomsM.Unlock()
|
||||
clients = make(map[*Client]struct{})
|
||||
finished := make(chan struct{})
|
||||
go Processor(events, finished)
|
||||
defer func() {
|
||||
@ -182,12 +184,14 @@ func TestJoin(t *testing.T) {
|
||||
for i := 0; i < 4*2; i++ {
|
||||
<-conn.outbound
|
||||
}
|
||||
roomsM.RLock()
|
||||
if _, ok := rooms["#bar"]; !ok {
|
||||
t.Fatal("#bar does not exist")
|
||||
}
|
||||
if _, ok := rooms["#baz"]; !ok {
|
||||
t.Fatal("#baz does not exist")
|
||||
}
|
||||
roomsM.RUnlock()
|
||||
if r := <-logSink; (r.what != "joined") || (r.where != "#bar") || (r.who != "nick2") || (r.meta != true) {
|
||||
t.Fatal("invalid join log event #bar", r)
|
||||
}
|
||||
@ -199,12 +203,14 @@ func TestJoin(t *testing.T) {
|
||||
for i := 0; i < 4*2; i++ {
|
||||
<-conn.outbound
|
||||
}
|
||||
roomsM.RLock()
|
||||
if *rooms["#barenc"].key != "key1" {
|
||||
t.Fatal("no room with key1")
|
||||
}
|
||||
if *rooms["#bazenc"].key != "key2" {
|
||||
t.Fatal("no room with key2")
|
||||
}
|
||||
roomsM.RUnlock()
|
||||
if r := <-logSink; (r.what != "joined") || (r.where != "#barenc") || (r.who != "nick2") || (r.meta != true) {
|
||||
t.Fatal("invalid join log event #barenc", r)
|
||||
}
|
||||
@ -222,9 +228,11 @@ func TestJoin(t *testing.T) {
|
||||
if r := <-conn.outbound; r != ":nick2!foo2@someclient MODE #barenc -k\r\n" {
|
||||
t.Fatal("remove #barenc key", r)
|
||||
}
|
||||
roomsM.RLock()
|
||||
if *rooms["#barenc"].key != "" {
|
||||
t.Fatal("removing key from #barenc")
|
||||
}
|
||||
roomsM.RUnlock()
|
||||
if r := <-logSink; (r.what != "removed channel key") || (r.where != "#barenc") || (r.who != "nick2") || (r.meta != true) {
|
||||
t.Fatal("removed channel key log", r)
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user