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- // Copyright (c) 2012-2014 Jeremy Latt
- // Copyright (c) 2014-2015 Edmund Huber
- // Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
- // released under the MIT license
-
- package irc
-
- import (
- "bytes"
- "crypto/subtle"
- "fmt"
- "strconv"
- "time"
-
- "sync"
-
- "github.com/goshuirc/irc-go/ircmsg"
- "github.com/oragono/oragono/irc/caps"
- "github.com/oragono/oragono/irc/modes"
- )
-
- // Channel represents a channel that clients can join.
- type Channel struct {
- flags *modes.ModeSet
- lists map[modes.Mode]*UserMaskSet
- key string
- members MemberSet
- membersCache []*Client // allow iteration over channel members without holding the lock
- name string
- nameCasefolded string
- server *Server
- createdTime time.Time
- registeredFounder string
- registeredTime time.Time
- stateMutex sync.RWMutex // tier 1
- joinPartMutex sync.Mutex // tier 3
- topic string
- topicSetBy string
- topicSetTime time.Time
- userLimit uint64
- accountToUMode map[string]modes.Mode
- }
-
- // NewChannel creates a new channel from a `Server` and a `name`
- // string, which must be unique on the server.
- func NewChannel(s *Server, name string, regInfo *RegisteredChannel) *Channel {
- casefoldedName, err := CasefoldChannel(name)
- if err != nil {
- s.logger.Error("internal", fmt.Sprintf("Bad channel name %s: %v", name, err))
- return nil
- }
-
- channel := &Channel{
- createdTime: time.Now(), // may be overwritten by applyRegInfo
- flags: modes.NewModeSet(),
- lists: map[modes.Mode]*UserMaskSet{
- modes.BanMask: NewUserMaskSet(),
- modes.ExceptMask: NewUserMaskSet(),
- modes.InviteMask: NewUserMaskSet(),
- },
- members: make(MemberSet),
- name: name,
- nameCasefolded: casefoldedName,
- server: s,
- accountToUMode: make(map[string]modes.Mode),
- }
-
- if regInfo != nil {
- channel.applyRegInfo(regInfo)
- } else {
- for _, mode := range s.DefaultChannelModes() {
- channel.flags.SetMode(mode, true)
- }
- }
-
- return channel
- }
-
- // read in channel state that was persisted in the DB
- func (channel *Channel) applyRegInfo(chanReg *RegisteredChannel) {
- channel.registeredFounder = chanReg.Founder
- channel.registeredTime = chanReg.RegisteredAt
- channel.topic = chanReg.Topic
- channel.topicSetBy = chanReg.TopicSetBy
- channel.topicSetTime = chanReg.TopicSetTime
- channel.name = chanReg.Name
- channel.createdTime = chanReg.RegisteredAt
- channel.key = chanReg.Key
-
- for _, mode := range chanReg.Modes {
- channel.flags.SetMode(mode, true)
- }
- for _, mask := range chanReg.Banlist {
- channel.lists[modes.BanMask].Add(mask)
- }
- for _, mask := range chanReg.Exceptlist {
- channel.lists[modes.ExceptMask].Add(mask)
- }
- for _, mask := range chanReg.Invitelist {
- channel.lists[modes.InviteMask].Add(mask)
- }
- for account, mode := range chanReg.AccountToUMode {
- channel.accountToUMode[account] = mode
- }
- }
-
- // obtain a consistent snapshot of the channel state that can be persisted to the DB
- func (channel *Channel) ExportRegistration(includeFlags uint) (info RegisteredChannel) {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- info.Name = channel.name
- info.Founder = channel.registeredFounder
- info.RegisteredAt = channel.registeredTime
-
- if includeFlags&IncludeTopic != 0 {
- info.Topic = channel.topic
- info.TopicSetBy = channel.topicSetBy
- info.TopicSetTime = channel.topicSetTime
- }
-
- if includeFlags&IncludeModes != 0 {
- info.Key = channel.key
- info.Modes = channel.flags.AllModes()
- }
-
- if includeFlags&IncludeLists != 0 {
- for mask := range channel.lists[modes.BanMask].masks {
- info.Banlist = append(info.Banlist, mask)
- }
- for mask := range channel.lists[modes.ExceptMask].masks {
- info.Exceptlist = append(info.Exceptlist, mask)
- }
- for mask := range channel.lists[modes.InviteMask].masks {
- info.Invitelist = append(info.Invitelist, mask)
- }
- info.AccountToUMode = make(map[string]modes.Mode)
- for account, mode := range channel.accountToUMode {
- info.AccountToUMode[account] = mode
- }
- }
-
- return
- }
-
- // SetRegistered registers the channel, returning an error if it was already registered.
- func (channel *Channel) SetRegistered(founder string) error {
- channel.stateMutex.Lock()
- defer channel.stateMutex.Unlock()
-
- if channel.registeredFounder != "" {
- return errChannelAlreadyRegistered
- }
- channel.registeredFounder = founder
- channel.registeredTime = time.Now()
- channel.accountToUMode[founder] = modes.ChannelFounder
- return nil
- }
-
- // SetUnregistered deletes the channel's registration information.
- func (channel *Channel) SetUnregistered() {
- channel.stateMutex.Lock()
- defer channel.stateMutex.Unlock()
-
- channel.registeredFounder = ""
- var zeroTime time.Time
- channel.registeredTime = zeroTime
- channel.accountToUMode = make(map[string]modes.Mode)
- }
-
- // IsRegistered returns whether the channel is registered.
- func (channel *Channel) IsRegistered() bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- return channel.registeredFounder != ""
- }
-
- func (channel *Channel) regenerateMembersCache() {
- channel.stateMutex.RLock()
- result := make([]*Client, len(channel.members))
- i := 0
- for client := range channel.members {
- result[i] = client
- i++
- }
- channel.stateMutex.RUnlock()
-
- channel.stateMutex.Lock()
- channel.membersCache = result
- channel.stateMutex.Unlock()
- }
-
- // Names sends the list of users joined to the channel to the given client.
- func (channel *Channel) Names(client *Client, rb *ResponseBuffer) {
- isMultiPrefix := client.capabilities.Has(caps.MultiPrefix)
- isUserhostInNames := client.capabilities.Has(caps.UserhostInNames)
-
- maxNamLen := 480 - len(client.server.name) - len(client.Nick())
- var namesLines []string
- var buffer bytes.Buffer
- for _, target := range channel.Members() {
- var nick string
- if isUserhostInNames {
- nick = target.NickMaskString()
- } else {
- nick = target.Nick()
- }
- channel.stateMutex.RLock()
- modes := channel.members[target]
- channel.stateMutex.RUnlock()
- if modes == nil {
- continue
- }
- prefix := modes.Prefixes(isMultiPrefix)
- if buffer.Len()+len(nick)+len(prefix)+1 > maxNamLen {
- namesLines = append(namesLines, buffer.String())
- // memset(&buffer, 0, sizeof(bytes.Buffer));
- var newBuffer bytes.Buffer
- buffer = newBuffer
- }
- if buffer.Len() > 0 {
- buffer.WriteString(" ")
- }
- buffer.WriteString(prefix)
- buffer.WriteString(nick)
- }
- if buffer.Len() > 0 {
- namesLines = append(namesLines, buffer.String())
- }
-
- for _, line := range namesLines {
- if buffer.Len() > 0 {
- rb.Add(nil, client.server.name, RPL_NAMREPLY, client.nick, "=", channel.name, line)
- }
- }
- rb.Add(nil, client.server.name, RPL_ENDOFNAMES, client.nick, channel.name, client.t("End of NAMES list"))
- }
-
- // ClientIsAtLeast returns whether the client has at least the given channel privilege.
- func (channel *Channel) ClientIsAtLeast(client *Client, permission modes.Mode) bool {
- channel.stateMutex.RLock()
- clientModes := channel.members[client]
- channel.stateMutex.RUnlock()
-
- if clientModes == nil {
- return false
- }
-
- for _, mode := range modes.ChannelUserModes {
- if clientModes.HasMode(mode) {
- return true
- }
-
- if mode == permission {
- break
- }
- }
-
- return false
- }
-
- func (channel *Channel) ClientPrefixes(client *Client, isMultiPrefix bool) string {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- modes, present := channel.members[client]
- if !present {
- return ""
- } else {
- return modes.Prefixes(isMultiPrefix)
- }
- }
-
- func (channel *Channel) ClientHasPrivsOver(client *Client, target *Client) bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- clientModes := channel.members[client]
- targetModes := channel.members[target]
- result := false
- for _, mode := range modes.ChannelPrivModes {
- if clientModes.HasMode(mode) {
- result = true
- // admins cannot kick other admins
- if mode == modes.ChannelAdmin && targetModes.HasMode(modes.ChannelAdmin) {
- result = false
- }
- break
- } else if targetModes.HasMode(mode) {
- break
- }
- }
- return result
- }
-
- func (channel *Channel) hasClient(client *Client) bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- _, present := channel.members[client]
- return present
- }
-
- // <mode> <mode params>
- func (channel *Channel) modeStrings(client *Client) (result []string) {
- isMember := client.HasMode(modes.Operator) || channel.hasClient(client)
- showKey := isMember && (channel.key != "")
- showUserLimit := channel.userLimit > 0
-
- mods := "+"
-
- // flags with args
- if showKey {
- mods += modes.Key.String()
- }
- if showUserLimit {
- mods += modes.UserLimit.String()
- }
-
- mods += channel.flags.String()
-
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- result = []string{mods}
-
- // args for flags with args: The order must match above to keep
- // positional arguments in place.
- if showKey {
- result = append(result, channel.key)
- }
- if showUserLimit {
- result = append(result, strconv.FormatUint(channel.userLimit, 10))
- }
-
- return
- }
-
- // IsFull returns true if this channel is at its' members limit.
- func (channel *Channel) IsFull() bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- return (channel.userLimit > 0) && (uint64(len(channel.members)) >= channel.userLimit)
- }
-
- // CheckKey returns true if the key is not set or matches the given key.
- func (channel *Channel) CheckKey(key string) bool {
- chkey := channel.Key()
- if chkey == "" {
- return true
- }
-
- return subtle.ConstantTimeCompare([]byte(key), []byte(chkey)) == 1
- }
-
- func (channel *Channel) IsEmpty() bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
- return len(channel.members) == 0
- }
-
- // Join joins the given client to this channel (if they can be joined).
- func (channel *Channel) Join(client *Client, key string, isSajoin bool, rb *ResponseBuffer) {
- if channel.hasClient(client) {
- // already joined, no message needs to be sent
- return
- }
-
- channel.stateMutex.RLock()
- chname := channel.name
- founder := channel.registeredFounder
- channel.stateMutex.RUnlock()
- account := client.Account()
- hasPrivs := isSajoin || (founder != "" && founder == account)
-
- if !hasPrivs && channel.IsFull() {
- rb.Add(nil, client.server.name, ERR_CHANNELISFULL, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "l"))
- return
- }
-
- if !hasPrivs && !channel.CheckKey(key) {
- rb.Add(nil, client.server.name, ERR_BADCHANNELKEY, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "k"))
- return
- }
-
- isInvited := channel.lists[modes.InviteMask].Match(client.nickMaskCasefolded)
- if !hasPrivs && channel.flags.HasMode(modes.InviteOnly) && !isInvited {
- rb.Add(nil, client.server.name, ERR_INVITEONLYCHAN, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "i"))
- return
- }
-
- if !hasPrivs && channel.lists[modes.BanMask].Match(client.nickMaskCasefolded) &&
- !isInvited &&
- !channel.lists[modes.ExceptMask].Match(client.nickMaskCasefolded) {
- rb.Add(nil, client.server.name, ERR_BANNEDFROMCHAN, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "b"))
- return
- }
-
- client.server.logger.Debug("join", fmt.Sprintf("%s joined channel %s", client.nick, chname))
-
- newChannel, givenMode := func() (newChannel bool, givenMode modes.Mode) {
- channel.joinPartMutex.Lock()
- defer channel.joinPartMutex.Unlock()
-
- func() {
- channel.stateMutex.Lock()
- defer channel.stateMutex.Unlock()
-
- channel.members.Add(client)
- firstJoin := len(channel.members) == 1
- newChannel = firstJoin && channel.registeredFounder == ""
- if newChannel {
- givenMode = modes.ChannelOperator
- } else {
- givenMode = channel.accountToUMode[account]
- }
- if givenMode != 0 {
- channel.members[client].SetMode(givenMode, true)
- }
- }()
-
- channel.regenerateMembersCache()
- return
- }()
-
- client.addChannel(channel)
-
- nick := client.Nick()
- nickmask := client.NickMaskString()
- realname := client.Realname()
- accountName := client.AccountName()
- var modestr string
- if givenMode != 0 {
- modestr = fmt.Sprintf("+%v", givenMode)
- }
-
- for _, member := range channel.Members() {
- if member == client {
- continue
- }
- if member.capabilities.Has(caps.ExtendedJoin) {
- member.Send(nil, nickmask, "JOIN", chname, accountName, realname)
- } else {
- member.Send(nil, nickmask, "JOIN", chname)
- }
- if givenMode != 0 {
- member.Send(nil, client.server.name, "MODE", chname, modestr, nick)
- }
- }
-
- if client.capabilities.Has(caps.ExtendedJoin) {
- rb.Add(nil, nickmask, "JOIN", chname, accountName, realname)
- } else {
- rb.Add(nil, nickmask, "JOIN", chname)
- }
-
- // don't send topic when it's an entirely new channel
- if !newChannel {
- channel.SendTopic(client, rb)
- }
-
- channel.Names(client, rb)
-
- if givenMode != 0 {
- rb.Add(nil, client.server.name, "MODE", chname, modestr, nick)
- }
- }
-
- // Part parts the given client from this channel, with the given message.
- func (channel *Channel) Part(client *Client, message string, rb *ResponseBuffer) {
- chname := channel.Name()
- if !channel.hasClient(client) {
- rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, chname, client.t("You're not on that channel"))
- return
- }
-
- channel.Quit(client)
-
- nickmask := client.NickMaskString()
- for _, member := range channel.Members() {
- member.Send(nil, nickmask, "PART", chname, message)
- }
- rb.Add(nil, nickmask, "PART", chname, message)
-
- client.server.logger.Debug("part", fmt.Sprintf("%s left channel %s", client.nick, chname))
- }
-
- // SendTopic sends the channel topic to the given client.
- func (channel *Channel) SendTopic(client *Client, rb *ResponseBuffer) {
- if !channel.hasClient(client) {
- rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, client.nick, channel.name, client.t("You're not on that channel"))
- return
- }
-
- channel.stateMutex.RLock()
- name := channel.name
- topic := channel.topic
- topicSetBy := channel.topicSetBy
- topicSetTime := channel.topicSetTime
- channel.stateMutex.RUnlock()
-
- if topic == "" {
- rb.Add(nil, client.server.name, RPL_NOTOPIC, client.nick, name, client.t("No topic is set"))
- return
- }
-
- rb.Add(nil, client.server.name, RPL_TOPIC, client.nick, name, topic)
- rb.Add(nil, client.server.name, RPL_TOPICTIME, client.nick, name, topicSetBy, strconv.FormatInt(topicSetTime.Unix(), 10))
- }
-
- // SetTopic sets the topic of this channel, if the client is allowed to do so.
- func (channel *Channel) SetTopic(client *Client, topic string, rb *ResponseBuffer) {
- if !(client.HasMode(modes.Operator) || channel.hasClient(client)) {
- rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, channel.name, client.t("You're not on that channel"))
- return
- }
-
- if channel.flags.HasMode(modes.OpOnlyTopic) && !channel.ClientIsAtLeast(client, modes.ChannelOperator) {
- rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
- return
- }
-
- topicLimit := client.server.Limits().TopicLen
- if len(topic) > topicLimit {
- topic = topic[:topicLimit]
- }
-
- channel.stateMutex.Lock()
- channel.topic = topic
- channel.topicSetBy = client.nickMaskString
- channel.topicSetTime = time.Now()
- channel.stateMutex.Unlock()
-
- for _, member := range channel.Members() {
- if member == client {
- rb.Add(nil, client.nickMaskString, "TOPIC", channel.name, topic)
- } else {
- member.Send(nil, client.nickMaskString, "TOPIC", channel.name, topic)
- }
- }
-
- go channel.server.channelRegistry.StoreChannel(channel, IncludeTopic)
- }
-
- // CanSpeak returns true if the client can speak on this channel.
- func (channel *Channel) CanSpeak(client *Client) bool {
- channel.stateMutex.RLock()
- defer channel.stateMutex.RUnlock()
-
- _, hasClient := channel.members[client]
- if channel.flags.HasMode(modes.NoOutside) && !hasClient {
- return false
- }
- if channel.flags.HasMode(modes.Moderated) && !channel.ClientIsAtLeast(client, modes.Voice) {
- return false
- }
- if channel.flags.HasMode(modes.RegisteredOnly) && client.Account() == "" {
- return false
- }
- return true
- }
-
- // TagMsg sends a tag message to everyone in this channel who can accept them.
- func (channel *Channel) TagMsg(msgid string, minPrefix *modes.Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, rb *ResponseBuffer) {
- channel.sendMessage(msgid, "TAGMSG", []caps.Capability{caps.MessageTags}, minPrefix, clientOnlyTags, client, nil, rb)
- }
-
- // sendMessage sends a given message to everyone on this channel.
- func (channel *Channel) sendMessage(msgid, cmd string, requiredCaps []caps.Capability, minPrefix *modes.Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message *string, rb *ResponseBuffer) {
- if !channel.CanSpeak(client) {
- rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
- return
- }
-
- // for STATUSMSG
- var minPrefixMode modes.Mode
- if minPrefix != nil {
- minPrefixMode = *minPrefix
- }
- // send echo-message
- if client.capabilities.Has(caps.EchoMessage) {
- var messageTagsToUse *map[string]ircmsg.TagValue
- if client.capabilities.Has(caps.MessageTags) {
- messageTagsToUse = clientOnlyTags
- }
-
- if message == nil {
- rb.AddFromClient(msgid, client, messageTagsToUse, cmd, channel.name)
- } else {
- rb.AddFromClient(msgid, client, messageTagsToUse, cmd, channel.name, *message)
- }
- }
- for _, member := range channel.Members() {
- if minPrefix != nil && !channel.ClientIsAtLeast(member, minPrefixMode) {
- // STATUSMSG
- continue
- }
- // echo-message is handled above, so skip sending the msg to the user themselves as well
- if member == client {
- continue
- }
-
- canReceive := true
- for _, capName := range requiredCaps {
- if !member.capabilities.Has(capName) {
- canReceive = false
- }
- }
- if !canReceive {
- continue
- }
-
- var messageTagsToUse *map[string]ircmsg.TagValue
- if member.capabilities.Has(caps.MessageTags) {
- messageTagsToUse = clientOnlyTags
- }
-
- if message == nil {
- member.SendFromClient(msgid, client, messageTagsToUse, cmd, channel.name)
- } else {
- member.SendFromClient(msgid, client, messageTagsToUse, cmd, channel.name, *message)
- }
- }
- }
-
- // SplitPrivMsg sends a private message to everyone in this channel.
- func (channel *Channel) SplitPrivMsg(msgid string, minPrefix *modes.Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message SplitMessage, rb *ResponseBuffer) {
- channel.sendSplitMessage(msgid, "PRIVMSG", minPrefix, clientOnlyTags, client, &message, rb)
- }
-
- // SplitNotice sends a private message to everyone in this channel.
- func (channel *Channel) SplitNotice(msgid string, minPrefix *modes.Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message SplitMessage, rb *ResponseBuffer) {
- channel.sendSplitMessage(msgid, "NOTICE", minPrefix, clientOnlyTags, client, &message, rb)
- }
-
- func (channel *Channel) sendSplitMessage(msgid, cmd string, minPrefix *modes.Mode, clientOnlyTags *map[string]ircmsg.TagValue, client *Client, message *SplitMessage, rb *ResponseBuffer) {
- if !channel.CanSpeak(client) {
- rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
- return
- }
-
- // for STATUSMSG
- var minPrefixMode modes.Mode
- if minPrefix != nil {
- minPrefixMode = *minPrefix
- }
- // send echo-message
- if client.capabilities.Has(caps.EchoMessage) {
- var tagsToUse *map[string]ircmsg.TagValue
- if client.capabilities.Has(caps.MessageTags) {
- tagsToUse = clientOnlyTags
- }
- if message == nil {
- rb.AddFromClient(msgid, client, tagsToUse, cmd, channel.name)
- } else {
- rb.AddSplitMessageFromClient(msgid, client, tagsToUse, cmd, channel.name, *message)
- }
- }
- for _, member := range channel.Members() {
- if minPrefix != nil && !channel.ClientIsAtLeast(member, minPrefixMode) {
- // STATUSMSG
- continue
- }
- // echo-message is handled above, so skip sending the msg to the user themselves as well
- if member == client {
- continue
- }
- var tagsToUse *map[string]ircmsg.TagValue
- if member.capabilities.Has(caps.MessageTags) {
- tagsToUse = clientOnlyTags
- }
-
- if message == nil {
- member.SendFromClient(msgid, client, tagsToUse, cmd, channel.name)
- } else {
- member.SendSplitMsgFromClient(msgid, client, tagsToUse, cmd, channel.name, *message)
- }
- }
- }
-
- func (channel *Channel) applyModeToMember(client *Client, mode modes.Mode, op modes.ModeOp, nick string, rb *ResponseBuffer) (result *modes.ModeChange) {
- casefoldedName, err := CasefoldName(nick)
- target := channel.server.clients.Get(casefoldedName)
- if err != nil || target == nil {
- rb.Add(nil, client.server.name, ERR_NOSUCHNICK, client.nick, nick, client.t("No such nick"))
- return nil
- }
-
- channel.stateMutex.Lock()
- modeset, exists := channel.members[target]
- if exists {
- if modeset.SetMode(mode, op == modes.Add) {
- result = &modes.ModeChange{
- Op: op,
- Mode: mode,
- Arg: nick,
- }
- }
- }
- channel.stateMutex.Unlock()
-
- if !exists {
- rb.Add(nil, client.server.name, ERR_USERNOTINCHANNEL, client.nick, channel.name, client.t("They aren't on that channel"))
- }
- return
- }
-
- // ShowMaskList shows the given list to the client.
- func (channel *Channel) ShowMaskList(client *Client, mode modes.Mode, rb *ResponseBuffer) {
- // choose appropriate modes
- var rpllist, rplendoflist string
- if mode == modes.BanMask {
- rpllist = RPL_BANLIST
- rplendoflist = RPL_ENDOFBANLIST
- } else if mode == modes.ExceptMask {
- rpllist = RPL_EXCEPTLIST
- rplendoflist = RPL_ENDOFEXCEPTLIST
- } else if mode == modes.InviteMask {
- rpllist = RPL_INVITELIST
- rplendoflist = RPL_ENDOFINVITELIST
- }
-
- nick := client.Nick()
- channel.stateMutex.RLock()
- // XXX don't acquire any new locks in this section, besides Socket.Write
- for mask := range channel.lists[mode].masks {
- rb.Add(nil, client.server.name, rpllist, nick, channel.name, mask)
- }
- channel.stateMutex.RUnlock()
-
- rb.Add(nil, client.server.name, rplendoflist, nick, channel.name, client.t("End of list"))
- }
-
- func (channel *Channel) applyModeMask(client *Client, mode modes.Mode, op modes.ModeOp, mask string, rb *ResponseBuffer) bool {
- list := channel.lists[mode]
- if list == nil {
- // This should never happen, but better safe than panicky.
- return false
- }
-
- if (op == modes.List) || (mask == "") {
- channel.ShowMaskList(client, mode, rb)
- return false
- }
-
- if !channel.ClientIsAtLeast(client, modes.ChannelOperator) {
- rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
- return false
- }
-
- if op == modes.Add {
- return list.Add(mask)
- }
-
- if op == modes.Remove {
- return list.Remove(mask)
- }
-
- return false
- }
-
- // Quit removes the given client from the channel
- func (channel *Channel) Quit(client *Client) {
- channelEmpty := func() bool {
- channel.joinPartMutex.Lock()
- defer channel.joinPartMutex.Unlock()
-
- channel.stateMutex.Lock()
- channel.members.Remove(client)
- channelEmpty := len(channel.members) == 0
- channel.stateMutex.Unlock()
- channel.regenerateMembersCache()
- return channelEmpty
- }()
-
- if channelEmpty {
- client.server.channels.Cleanup(channel)
- }
- client.removeChannel(channel)
- }
-
- func (channel *Channel) Kick(client *Client, target *Client, comment string, rb *ResponseBuffer) {
- if !(client.HasMode(modes.Operator) || channel.hasClient(client)) {
- rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, channel.name, client.t("You're not on that channel"))
- return
- }
- if !channel.ClientIsAtLeast(client, modes.ChannelOperator) {
- rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
- return
- }
- if !channel.hasClient(target) {
- rb.Add(nil, client.server.name, ERR_USERNOTINCHANNEL, client.nick, channel.name, client.t("They aren't on that channel"))
- return
- }
- if !channel.ClientHasPrivsOver(client, target) {
- rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You don't have enough channel privileges"))
- return
- }
-
- kicklimit := client.server.Limits().KickLen
- if len(comment) > kicklimit {
- comment = comment[:kicklimit]
- }
-
- clientMask := client.NickMaskString()
- targetNick := target.Nick()
- for _, member := range channel.Members() {
- member.Send(nil, clientMask, "KICK", channel.name, targetNick, comment)
- }
-
- channel.Quit(target)
- }
-
- // Invite invites the given client to the channel, if the inviter can do so.
- func (channel *Channel) Invite(invitee *Client, inviter *Client, rb *ResponseBuffer) {
- if channel.flags.HasMode(modes.InviteOnly) && !channel.ClientIsAtLeast(inviter, modes.ChannelOperator) {
- rb.Add(nil, inviter.server.name, ERR_CHANOPRIVSNEEDED, channel.name, inviter.t("You're not a channel operator"))
- return
- }
-
- if !channel.hasClient(inviter) {
- rb.Add(nil, inviter.server.name, ERR_NOTONCHANNEL, channel.name, inviter.t("You're not on that channel"))
- return
- }
-
- //TODO(dan): handle this more nicely, keep a list of last X invited channels on invitee rather than explicitly modifying the invite list?
- if channel.flags.HasMode(modes.InviteOnly) {
- nmc := invitee.NickCasefolded()
- channel.stateMutex.Lock()
- channel.lists[modes.InviteMask].Add(nmc)
- channel.stateMutex.Unlock()
- }
-
- for _, member := range channel.Members() {
- if member.capabilities.Has(caps.InviteNotify) && member != inviter && member != invitee && channel.ClientIsAtLeast(member, modes.Halfop) {
- member.Send(nil, inviter.NickMaskString(), "INVITE", invitee.Nick(), channel.name)
- }
- }
-
- //TODO(dan): should inviter.server.name here be inviter.nickMaskString ?
- rb.Add(nil, inviter.server.name, RPL_INVITING, invitee.nick, channel.name)
- invitee.Send(nil, inviter.nickMaskString, "INVITE", invitee.nick, channel.name)
- if invitee.HasMode(modes.Away) {
- rb.Add(nil, inviter.server.name, RPL_AWAY, invitee.nick, invitee.awayMessage)
- }
- }
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