Potentially resolve concurrent read/write crashes
This commit is contained in:
Trevor Slocum
parent
e12a23f209
commit
c92554fe62
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@ -23,6 +23,7 @@ import (
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"sync"
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"time"
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"github.com/orcaman/concurrent-map"
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irc "gopkg.in/sorcix/irc.v2"
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"os"
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"os/signal"
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@ -80,7 +81,7 @@ func randomIdentifier() string {
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func main() {
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rand.Seed(time.Now().UTC().UnixNano())
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server := Server{&Config{}, time.Now().Unix(), make(map[string]*Client), make(map[string]*Channel), make(chan bool, 1), make(chan bool, 1), new(sync.RWMutex)}
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server := Server{&Config{}, time.Now().Unix(), cmap.New(), cmap.New(), make(chan bool, 1), make(chan bool, 1), new(sync.RWMutex)}
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server.loadConfig()
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sighup := make(chan os.Signal, 1)
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@ -1,9 +1,11 @@
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package main
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import "github.com/orcaman/concurrent-map"
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type Channel struct {
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Entity
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clients map[string]int
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clients cmap.ConcurrentMap
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topic string
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topictime int64
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30
entity.go
30
entity.go
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@ -2,6 +2,7 @@ package main
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import (
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"fmt"
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"github.com/orcaman/concurrent-map"
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"strings"
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"sync"
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)
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@ -17,17 +18,21 @@ type Entity struct {
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entitytype int
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identifier string
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created int64
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modes map[string]string
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modes cmap.ConcurrentMap
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*sync.RWMutex
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}
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func (e *Entity) hasMode(mode string) bool {
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if _, ok := e.modes[mode]; ok {
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return true
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func (e *Entity) getModes() map[string]string {
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modes := make(map[string]string)
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for ms := range e.modes.IterBuffered() {
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modes[ms.Key] = ms.Val.(string)
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}
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return modes
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}
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return false
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func (e *Entity) hasMode(mode string) bool {
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return e.modes.Has(mode)
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}
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func (e *Entity) addMode(mode string, value string) {
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@ -39,7 +44,7 @@ func (e *Entity) addMode(mode string, value string) {
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}
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if strings.Index(allowedmodes, mode) != -1 && !e.hasMode(mode) {
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e.modes[mode] = value
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e.modes.Set(mode, value)
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}
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}
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@ -51,7 +56,7 @@ func (e *Entity) addModes(modes string) {
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func (e *Entity) removeMode(mode string) {
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if e.hasMode(mode) {
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delete(e.modes, mode)
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e.modes.Remove(mode)
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}
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}
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@ -64,17 +69,18 @@ func (e *Entity) removeModes(modes string) {
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func (e *Entity) diffModes(lastmodes map[string]string) (map[string]string, map[string]string) {
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addedmodes := make(map[string]string)
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if lastmodes != nil {
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for mode := range e.modes {
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if _, ok := lastmodes[mode]; !ok {
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addedmodes[mode] = lastmodes[mode]
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for m := range e.modes.IterBuffered() {
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if _, ok := lastmodes[m.Key]; !ok {
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addedmodes[m.Key] = lastmodes[m.Key]
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}
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}
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}
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removedmodes := make(map[string]string)
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for mode := range lastmodes {
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if _, ok := e.modes[mode]; !ok {
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removedmodes[mode] = e.modes[mode]
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if e.hasMode(mode) {
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m, _ := e.modes.Get(mode)
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removedmodes[mode] = m.(string)
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}
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}
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284
server.go
284
server.go
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@ -11,6 +11,7 @@ import (
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"crypto/tls"
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"github.com/BurntSushi/toml"
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cmap "github.com/orcaman/concurrent-map"
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irc "gopkg.in/sorcix/irc.v2"
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"math/rand"
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"os"
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@ -25,8 +26,8 @@ type Config struct {
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type Server struct {
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config *Config
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created int64
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clients map[string]*Client
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channels map[string]*Channel
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clients cmap.ConcurrentMap
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channels cmap.ConcurrentMap
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restartplain chan bool
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restartssl chan bool
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@ -42,19 +43,27 @@ func (s *Server) getAnonymousPrefix(i int) *irc.Prefix {
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return &prefix
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}
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func (s *Server) getChannel(channel string) *Channel {
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if ch, ok := s.channels.Get(channel); ok {
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return ch.(*Channel)
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}
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return nil
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}
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func (s *Server) getChannels(client string) map[string]*Channel {
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channels := make(map[string]*Channel)
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for channelname, channel := range s.channels {
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if s.inChannel(channelname, client) {
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channels[channelname] = channel
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for chs := range s.channels.IterBuffered() {
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if s.inChannel(chs.Key, client) {
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channels[chs.Key] = chs.Val.(*Channel)
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}
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}
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return channels
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}
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func (s *Server) getClient(client string) *Client {
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if _, ok := s.clients[client]; ok {
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return s.clients[client]
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if cl, ok := s.clients.Get(client); ok {
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return cl.(*Client)
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}
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return nil
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@ -62,22 +71,18 @@ func (s *Server) getClient(client string) *Client {
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func (s *Server) getClients(channel string) map[string]*Client {
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clients := make(map[string]*Client)
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if !s.channelExists(channel) {
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return clients
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}
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for clientname := range s.channels[channel].clients {
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cl := s.getClient(clientname)
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if cl != nil {
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clients[clientname] = cl
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}
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ch := s.getChannel(channel)
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for cls := range ch.clients.IterBuffered() {
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clients[cls.Key] = cls.Val.(*Client)
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}
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return clients
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}
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func (s *Server) channelExists(channel string) bool {
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if _, ok := s.channels[channel]; ok {
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if _, ok := s.channels.Get(channel); ok {
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return true
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}
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@ -85,10 +90,9 @@ func (s *Server) channelExists(channel string) bool {
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}
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func (s *Server) inChannel(channel string, client string) bool {
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if s.channelExists(channel) {
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if _, ok := s.channels[channel].clients[client]; ok {
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return true
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}
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ch := s.getChannel(channel)
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if ch != nil {
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return ch.clients.Has(client)
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}
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return false
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@ -99,35 +103,41 @@ func (s *Server) joinChannel(channel string, client string) {
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return // Already in channel
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}
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if !s.channelExists(channel) {
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s.channels[channel] = &Channel{Entity{ENTITY_CHANNEL, channel, time.Now().Unix(), make(map[string]string), new(sync.RWMutex)}, make(map[string]int), "", 0}
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} else if s.channels[channel].hasMode("z") && !s.clients[client].ssl {
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s.clients[client].sendNotice("Unable to join " + channel + ": SSL connections only (channel mode +z)")
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ch := s.getChannel(channel)
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cl := s.getClient(client)
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if cl == nil {
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return
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}
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s.channels[channel].Lock()
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s.channels[channel].clients[client] = s.getClientCount(channel, client)
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s.channels[channel].Unlock()
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s.clients[client].write(&irc.Message{s.clients[client].getPrefix(), irc.JOIN, []string{channel}})
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if ch == nil {
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ch = &Channel{Entity{ENTITY_CHANNEL, channel, time.Now().Unix(), cmap.New(), new(sync.RWMutex)}, cmap.New(), "", 0}
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s.channels.Set(channel, ch)
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} else if ch.hasMode("z") && !cl.ssl {
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cl.sendNotice("Unable to join " + channel + ": SSL connections only (channel mode +z)")
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return
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}
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ch.clients.Set(client, s.getClientCount(channel, client)+1)
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cl.write(&irc.Message{cl.getPrefix(), irc.JOIN, []string{channel}})
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s.sendNames(channel, client)
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s.updateClientCount(channel, "")
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s.updateClientCount(channel)
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s.sendTopic(channel, client, false)
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}
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func (s *Server) partChannel(channel string, client string, reason string) {
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if !s.inChannel(channel, client) {
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ch := s.getChannel(channel)
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cl := s.getClient(client)
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if cl == nil || !s.inChannel(channel, client) {
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return
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}
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s.clients[client].write(&irc.Message{s.clients[client].getPrefix(), irc.PART, []string{channel, reason}})
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cl.write(&irc.Message{cl.getPrefix(), irc.PART, []string{channel, reason}})
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ch.clients.Remove(client)
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s.channels[channel].Lock()
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delete(s.channels[channel].clients, client)
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s.channels[channel].Unlock()
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s.updateClientCount(channel, "")
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s.updateClientCount(channel)
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}
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func (s *Server) partAllChannels(client string) {
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@ -137,9 +147,11 @@ func (s *Server) partAllChannels(client string) {
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}
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func (s *Server) enforceModes(channel string) {
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if s.channels[channel].hasMode("z") {
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for client := range s.getClients(channel) {
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if !s.clients[client].ssl {
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ch := s.getChannel(channel)
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if ch != nil && ch.hasMode("z") {
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for client, cl := range s.getClients(channel) {
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if !cl.ssl {
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s.partChannel(channel, client, "Only SSL connections are allowed in this channel")
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}
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}
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@ -147,42 +159,55 @@ func (s *Server) enforceModes(channel string) {
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}
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func (s *Server) getClientCount(channel string, client string) int {
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ccount := len(s.channels[channel].clients)
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ch := s.getChannel(channel)
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cl := s.getClient(client)
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if (s.clients[client].hasMode("c") || s.channels[channel].hasMode("c")) && ccount >= 2 {
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if ch == nil || cl == nil {
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return 0
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}
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ccount := ch.clients.Count()
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if (ch.hasMode("c") || cl.hasMode("c")) && ccount >= 2 {
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return 2
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}
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return ccount
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}
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func (s *Server) updateClientCount(channel string, client string) {
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clients := make(map[string]int)
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if client != "" {
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clients[client] = s.channels[channel].clients[client]
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} else {
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clients = s.channels[channel].clients
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func (s *Server) updateClientCount(channel string) {
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ch := s.getChannel(channel)
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if ch == nil {
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return
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}
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for cclient, ccount := range clients {
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for cls := range ch.clients.IterBuffered() {
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cclient := cls.Key
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ccount := cls.Val.(int)
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chancount := s.getClientCount(channel, cclient)
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cl := s.getClient(cclient)
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if cl == nil {
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continue
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}
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if ccount < chancount {
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s.channels[channel].Lock()
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for i := ccount; i < chancount - 1; i++ {
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s.clients[cclient].write(&irc.Message{s.getAnonymousPrefix(i), irc.JOIN, []string{channel}})
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for i := ccount; i < chancount; i++ {
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cl.write(&irc.Message{s.getAnonymousPrefix(i), irc.JOIN, []string{channel}})
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}
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s.channels[channel].clients[cclient] = chancount
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s.channels[channel].Unlock()
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ch.clients.Set(cclient, chancount)
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} else if ccount > chancount {
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s.channels[channel].Lock()
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for i := ccount; i > chancount - 1; i-- {
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s.clients[cclient].write(&irc.Message{s.getAnonymousPrefix(i), irc.PART, []string{channel}})
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for i := ccount; i > chancount; i-- {
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cl.write(&irc.Message{s.getAnonymousPrefix(i - 1), irc.PART, []string{channel}})
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}
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s.channels[channel].clients[cclient] = chancount
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s.channels[channel].Unlock()
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} else {
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continue
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}
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ch.clients.Set(cclient, chancount)
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}
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}
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@ -215,35 +240,49 @@ func (s *Server) sendTopic(channel string, client string, changed bool) {
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return
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}
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if s.channels[channel].topic != "" {
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ch := s.getChannel(channel)
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cl := s.getClient(client)
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if ch == nil || cl == nil {
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return
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}
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if ch.topic != "" {
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tprefix := anonymous
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tcommand := irc.TOPIC
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if !changed {
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tprefix = anonirc
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tcommand = irc.RPL_TOPIC
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}
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s.clients[client].write(&irc.Message{&tprefix, tcommand, []string{channel, s.channels[channel].topic}})
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cl.write(&irc.Message{&tprefix, tcommand, []string{channel, ch.topic}})
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if !changed {
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s.clients[client].write(&irc.Message{&anonirc, strings.Join([]string{irc.RPL_TOPICWHOTIME, s.clients[client].nick, channel, "Anonymous", fmt.Sprintf("%d", s.channels[channel].topictime)}, " "), nil})
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cl.write(&irc.Message{&anonirc, strings.Join([]string{irc.RPL_TOPICWHOTIME, cl.nick, channel, "Anonymous", fmt.Sprintf("%d", ch.topictime)}, " "), nil})
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}
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}
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}
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func (s *Server) handleTopic(channel string, client string, topic string) {
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ch := s.getChannel(channel)
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cl := s.getClient(client)
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if ch == nil || cl == nil {
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return
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}
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if !s.inChannel(channel, client) {
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s.clients[client].sendNotice("Invalid use of TOPIC")
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cl.sendNotice("Invalid use of TOPIC")
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return
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}
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if topic != "" {
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s.channels[channel].Lock()
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s.channels[channel].topic = topic
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s.channels[channel].topictime = time.Now().Unix()
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s.channels[channel].Unlock()
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ch.Lock()
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ch.topic = topic
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ch.topictime = time.Now().Unix()
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ch.Unlock()
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for sclient := range s.channels[channel].clients {
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s.sendTopic(channel, sclient, true)
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for cls := range ch.clients.IterBuffered() {
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s.sendTopic(channel, cls.Key, true)
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}
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} else {
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s.sendTopic(channel, client, false)
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@ -257,34 +296,35 @@ func (s *Server) handleMode(c *Client, params []string) {
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}
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if params[0][0] == '#' {
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if !s.channelExists(params[0]) {
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ch := s.getChannel(params[0])
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if ch == nil {
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return
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}
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channel := s.channels[params[0]]
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if len(params) == 1 || params[1] == "" {
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c.write(&irc.Message{&anonirc, strings.Join([]string{irc.RPL_CHANNELMODEIS, c.nick, params[0], channel.printModes(channel.modes, nil)}, " "), []string{}})
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c.write(&irc.Message{&anonirc, strings.Join([]string{irc.RPL_CHANNELMODEIS, c.nick, params[0], ch.printModes(ch.getModes(), nil)}, " "), []string{}})
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// Send channel creation time
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c.write(&irc.Message{&anonirc, strings.Join([]string{"329", c.nick, params[0], fmt.Sprintf("%d", int32(channel.created))}, " "), []string{}})
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c.write(&irc.Message{&anonirc, strings.Join([]string{"329", c.nick, params[0], fmt.Sprintf("%d", int32(ch.created))}, " "), []string{}})
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} else if len(params) > 1 && len(params[1]) > 0 && (params[1][0] == '+' || params[1][0] == '-') {
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lastmodes := make(map[string]string)
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for mode, modevalue := range channel.modes {
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lastmodes[mode] = modevalue
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for ms := range ch.modes.IterBuffered() {
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lastmodes[ms.Key] = ms.Val.(string)
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}
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channel.Lock()
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ch.Lock()
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if params[1][0] == '+' {
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channel.addModes(params[1][1:])
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ch.addModes(params[1][1:])
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} else {
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channel.removeModes(params[1][1:])
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ch.removeModes(params[1][1:])
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}
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channel.Unlock()
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ch.Unlock()
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s.enforceModes(params[0])
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if !reflect.DeepEqual(channel.modes, lastmodes) {
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if !reflect.DeepEqual(ch.modes.Items(), lastmodes) {
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// TODO: Check if local modes were set/unset, only send changes to local client
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addedmodes, removedmodes := channel.diffModes(lastmodes)
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addedmodes, removedmodes := ch.diffModes(lastmodes)
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||||
resendusercount := false
|
||||
if _, ok := addedmodes["c"]; ok {
|
||||
|
|
@ -295,28 +335,29 @@ func (s *Server) handleMode(c *Client, params []string) {
|
|||
}
|
||||
|
||||
if len(addedmodes) == 0 && len(removedmodes) == 0 {
|
||||
addedmodes = c.modes
|
||||
addedmodes = c.getModes()
|
||||
}
|
||||
|
||||
for sclient := range channel.clients {
|
||||
s.clients[sclient].write(&irc.Message{&anonymous, irc.MODE, []string{params[0], channel.printModes(addedmodes, removedmodes)}})
|
||||
for cls := range ch.clients.IterBuffered() {
|
||||
cl := s.getClient(cls.Key)
|
||||
|
||||
if cl != nil {
|
||||
cl.write(&irc.Message{&anonymous, irc.MODE, []string{params[0], ch.printModes(addedmodes, removedmodes)}})
|
||||
}
|
||||
}
|
||||
|
||||
if resendusercount {
|
||||
s.updateClientCount(params[0], "")
|
||||
s.updateClientCount(params[0])
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
if len(params) == 1 || params[1] == "" {
|
||||
c.write(&irc.Message{&anonirc, strings.Join([]string{irc.RPL_UMODEIS, c.nick, c.printModes(c.modes, nil)}, " "), []string{}})
|
||||
c.write(&irc.Message{&anonirc, strings.Join([]string{irc.RPL_UMODEIS, c.nick, c.printModes(c.getModes(), nil)}, " "), []string{}})
|
||||
return
|
||||
}
|
||||
|
||||
lastmodes := make(map[string]string)
|
||||
for mode, modevalue := range c.modes {
|
||||
lastmodes[mode] = modevalue
|
||||
}
|
||||
lastmodes := c.getModes()
|
||||
|
||||
if len(params) > 1 && len(params[1]) > 0 && (params[1][0] == '+' || params[1][0] == '-') {
|
||||
c.Lock()
|
||||
|
|
@ -340,14 +381,14 @@ func (s *Server) handleMode(c *Client, params []string) {
|
|||
}
|
||||
|
||||
if len(addedmodes) == 0 && len(removedmodes) == 0 {
|
||||
addedmodes = c.modes
|
||||
addedmodes = c.getModes()
|
||||
}
|
||||
|
||||
c.write(&irc.Message{&anonirc, strings.Join([]string{irc.MODE, c.nick}, " "), []string{c.printModes(addedmodes, removedmodes)}})
|
||||
|
||||
if resendusercount {
|
||||
for ch := range s.getChannels(c.identifier) {
|
||||
s.updateClientCount(ch, c.identifier)
|
||||
s.updateClientCount(ch)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -359,9 +400,17 @@ func (s *Server) handlePrivmsg(channel string, client string, message string) {
|
|||
return // Not in channel
|
||||
}
|
||||
|
||||
for sclient := range s.channels[channel].clients {
|
||||
if s.clients[sclient].identifier != client {
|
||||
s.clients[sclient].write(&irc.Message{&anonymous, irc.PRIVMSG, []string{channel, message}})
|
||||
ch := s.getChannel(channel)
|
||||
|
||||
if ch == nil {
|
||||
return
|
||||
}
|
||||
|
||||
for cls := range ch.clients.IterBuffered() {
|
||||
ccl := s.getClient(cls.Key)
|
||||
|
||||
if ccl.identifier != client {
|
||||
ccl.write(&irc.Message{&anonymous, irc.PRIVMSG, []string{channel, message}})
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -369,7 +418,14 @@ func (s *Server) handlePrivmsg(channel string, client string, message string) {
|
|||
func (s *Server) handleRead(c *Client) {
|
||||
for {
|
||||
c.conn.SetDeadline(time.Now().Add(300 * time.Second))
|
||||
msg, err := s.clients[c.identifier].reader.Decode()
|
||||
|
||||
cl := s.getClient(c.identifier)
|
||||
|
||||
if cl == nil {
|
||||
return
|
||||
}
|
||||
|
||||
msg, err := cl.reader.Decode()
|
||||
if err != nil {
|
||||
log.Println("Unable to read from client:", err)
|
||||
s.partAllChannels(c.identifier)
|
||||
|
|
@ -419,18 +475,20 @@ func (s *Server) handleRead(c *Client) {
|
|||
|
||||
s.joinChannel("#", c.identifier)
|
||||
} else if msg.Command == irc.LIST {
|
||||
var ccount int
|
||||
chans := make(map[string]int)
|
||||
for channelname, channel := range s.channels {
|
||||
if !channel.hasMode("p") && !channel.hasMode("s") {
|
||||
ccount = s.getClientCount(channelname, c.identifier)
|
||||
chans[channelname] = ccount
|
||||
for chs := range s.channels.IterBuffered() {
|
||||
ch := s.getChannel(chs.Key)
|
||||
|
||||
if ch != nil && !ch.hasMode("p") && !ch.hasMode("s") {
|
||||
chans[chs.Key] = s.getClientCount(chs.Key, c.identifier)
|
||||
}
|
||||
}
|
||||
|
||||
c.write(&irc.Message{&anonirc, irc.RPL_LISTSTART, []string{"Channel", "Users Name"}})
|
||||
for _, pl := range sortMapByValues(chans) {
|
||||
c.write(&irc.Message{&anonirc, irc.RPL_LIST, []string{pl.Key, strconv.Itoa(pl.Value), "[" + s.channels[pl.Key].printModes(s.channels[pl.Key].modes, nil) + "] " + s.channels[pl.Key].topic}})
|
||||
ch := s.getChannel(pl.Key)
|
||||
|
||||
c.write(&irc.Message{&anonirc, irc.RPL_LIST, []string{pl.Key, strconv.Itoa(pl.Value), "[" + ch.printModes(ch.getModes(), nil) + "] " + ch.topic}})
|
||||
}
|
||||
c.write(&irc.Message{&anonirc, irc.RPL_LISTEND, []string{"End of /LIST"}})
|
||||
} else if msg.Command == irc.JOIN && len(msg.Params) > 0 && len(msg.Params[0]) > 0 && msg.Params[0][0] == '#' {
|
||||
|
|
@ -474,6 +532,7 @@ func (s *Server) handleRead(c *Client) {
|
|||
s.partChannel(channel, c.identifier, "")
|
||||
}
|
||||
} else if msg.Command == irc.QUIT {
|
||||
c.conn.Close()
|
||||
s.partAllChannels(c.identifier)
|
||||
}
|
||||
}
|
||||
|
|
@ -481,23 +540,24 @@ func (s *Server) handleRead(c *Client) {
|
|||
|
||||
func (s *Server) handleConnection(conn net.Conn, ssl bool) {
|
||||
defer conn.Close()
|
||||
|
||||
var identifier string
|
||||
|
||||
s.Lock()
|
||||
|
||||
for {
|
||||
identifier = randomIdentifier()
|
||||
if _, ok := s.clients[identifier]; !ok {
|
||||
if !s.clients.Has(identifier) {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
client := Client{Entity{ENTITY_CLIENT, identifier, time.Now().Unix(), make(map[string]string), new(sync.RWMutex)}, ssl, "*", "", "", conn, make(chan *irc.Message), irc.NewDecoder(conn), irc.NewEncoder(conn), false}
|
||||
client := &Client{Entity{ENTITY_CLIENT, identifier, time.Now().Unix(), cmap.New(), new(sync.RWMutex)}, ssl, "*", "", "", conn, make(chan *irc.Message), irc.NewDecoder(conn), irc.NewEncoder(conn), false}
|
||||
s.clients.Set(client.identifier, client)
|
||||
|
||||
s.Lock()
|
||||
s.clients[client.identifier] = &client
|
||||
s.Unlock()
|
||||
|
||||
go client.handleWrite()
|
||||
s.handleRead(&client)
|
||||
s.handleRead(client)
|
||||
}
|
||||
|
||||
func (s *Server) listenPlain() {
|
||||
|
|
@ -571,8 +631,12 @@ func (s *Server) listenSSL() {
|
|||
func (s *Server) pingClients() {
|
||||
for {
|
||||
s.Lock()
|
||||
for _, c := range s.clients {
|
||||
c.write(&irc.Message{nil, irc.PING, []string{fmt.Sprintf("anonirc%d%d", int32(time.Now().Unix()), rand.Intn(1000))}})
|
||||
for cls := range s.clients.IterBuffered() {
|
||||
cl := s.getClient(cls.Key)
|
||||
|
||||
if cl != nil {
|
||||
cl.write(&irc.Message{nil, irc.PING, []string{fmt.Sprintf("anonirc%d%d", int32(time.Now().Unix()), rand.Intn(1000))}})
|
||||
}
|
||||
}
|
||||
s.Unlock()
|
||||
time.Sleep(90 * time.Second)
|
||||
|
|
|
|||
Loading…
Reference in New Issue