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server.go
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server.go
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// Copyright (c) 2012-2014 Jeremy Latt
// Copyright (c) 2014-2015 Edmund Huber
// Copyright (c) 2016- Daniel Oaks <daniel@danieloaks.net>
// released under the MIT license
package irc
import (
"bufio"
"crypto/tls"
"encoding/base64"
"fmt"
"log"
"net"
"net/http"
"os"
"os/signal"
"strconv"
"strings"
"syscall"
"time"
"github.com/DanielOaks/girc-go/ircmsg"
"github.com/tidwall/buntdb"
)
// Limits holds the maximum limits for various things such as topic lengths
type Limits struct {
AwayLen int
ChannelLen int
KickLen int
MonitorEntries int
NickLen int
TopicLen int
}
type Server struct {
accounts map[string]*ClientAccount
channels ChannelNameMap
clients *ClientLookupSet
commands chan Command
ctime time.Time
store buntdb.DB
idle chan *Client
limits Limits
monitoring map[string][]Client
motdLines []string
name string
nameCasefolded string
newConns chan clientConn
operators map[string][]byte
password []byte
passwords *PasswordManager
accountRegistration *AccountRegistration
signals chan os.Signal
whoWas *WhoWasList
isupport *ISupportList
checkIdent bool
}
var (
SERVER_SIGNALS = []os.Signal{
syscall.SIGINT,
syscall.SIGHUP, // eventually we expect to use HUP to reload config
syscall.SIGTERM,
syscall.SIGQUIT,
}
)
type clientConn struct {
Conn net.Conn
IsTLS bool
}
func NewServer(config *Config) *Server {
casefoldedName, err := Casefold(config.Server.Name)
if err != nil {
log.Println(fmt.Sprintf("Server name isn't valid: [%s]", config.Server.Name), err.Error())
return nil
}
server := &Server{
accounts: make(map[string]*ClientAccount),
channels: make(ChannelNameMap),
clients: NewClientLookupSet(),
commands: make(chan Command),
ctime: time.Now(),
idle: make(chan *Client),
limits: Limits{
AwayLen: int(config.Limits.AwayLen),
ChannelLen: int(config.Limits.ChannelLen),
KickLen: int(config.Limits.KickLen),
MonitorEntries: int(config.Limits.MonitorEntries),
NickLen: int(config.Limits.NickLen),
TopicLen: int(config.Limits.TopicLen),
},
monitoring: make(map[string][]Client),
name: config.Server.Name,
nameCasefolded: casefoldedName,
newConns: make(chan clientConn),
operators: config.Operators(),
signals: make(chan os.Signal, len(SERVER_SIGNALS)),
whoWas: NewWhoWasList(config.Limits.WhowasEntries),
checkIdent: config.Server.CheckIdent,
}
// open data store
db, err := buntdb.Open(config.Datastore.Path)
if err != nil {
log.Fatal(fmt.Sprintf("Failed to open datastore: %s", err.Error()))
}
server.store = *db
// load password manager
err = server.store.View(func(tx *buntdb.Tx) error {
saltString, err := tx.Get(keySalt)
if err != nil {
return fmt.Errorf("Could not retrieve salt string: %s", err.Error())
}
salt, err := base64.StdEncoding.DecodeString(saltString)
if err != nil {
return err
}
pwm := NewPasswordManager(salt)
server.passwords = &pwm
return nil
})
if err != nil {
log.Fatal(fmt.Sprintf("Could not load salt: %s", err.Error()))
}
if config.Server.MOTD != "" {
file, err := os.Open(config.Server.MOTD)
if err == nil {
defer file.Close()
reader := bufio.NewReader(file)
for {
line, err := reader.ReadString('\n')
if err != nil {
break
}
line = strings.TrimRight(line, "\r\n")
// "- " is the required prefix for MOTD, we just add it here to make
// bursting it out to clients easier
line = fmt.Sprintf("- %s", line)
server.motdLines = append(server.motdLines, line)
}
}
}
if config.Server.Password != "" {
server.password = config.Server.PasswordBytes()
}
for _, addr := range config.Server.Listen {
server.listen(addr, config.TLSListeners())
}
if config.Server.Wslisten != "" {
server.wslisten(config.Server.Wslisten, config.Server.TLSListeners)
}
// registration
accountReg := NewAccountRegistration(config.Registration.Accounts)
server.accountRegistration = &accountReg
// Attempt to clean up when receiving these signals.
signal.Notify(server.signals, SERVER_SIGNALS...)
// add RPL_ISUPPORT tokens
server.isupport = NewISupportList()
server.isupport.Add("AWAYLEN", strconv.Itoa(server.limits.AwayLen))
server.isupport.Add("CASEMAPPING", "rfc7700")
server.isupport.Add("CHANMODES", strings.Join([]string{ChannelModes{BanMask, ExceptMask, InviteMask}.String(), "", ChannelModes{UserLimit, Key}.String(), ChannelModes{InviteOnly, Moderated, NoOutside, OpOnlyTopic, Secret}.String()}, ","))
server.isupport.Add("CHANNELLEN", strconv.Itoa(server.limits.ChannelLen))
server.isupport.Add("CHANTYPES", "#")
server.isupport.Add("EXCEPTS", "")
server.isupport.Add("INVEX", "")
server.isupport.Add("KICKLEN", strconv.Itoa(server.limits.KickLen))
// server.isupport.Add("MAXLIST", "") //TODO(dan): Support max list length?
// server.isupport.Add("MODES", "") //TODO(dan): Support max modes?
server.isupport.Add("MONITOR", strconv.Itoa(server.limits.MonitorEntries))
server.isupport.Add("NETWORK", config.Network.Name)
server.isupport.Add("NICKLEN", strconv.Itoa(server.limits.NickLen))
server.isupport.Add("PREFIX", "(qaohv)~&@%+")
// server.isupport.Add("STATUSMSG", "@+") //TODO(dan): Support STATUSMSG
// server.isupport.Add("TARGMAX", "") //TODO(dan): Support this
server.isupport.Add("TOPICLEN", strconv.Itoa(server.limits.TopicLen))
// account registration
if server.accountRegistration.Enabled {
// 'none' isn't shown in the REGCALLBACKS vars
var enabledCallbacks []string
for _, name := range server.accountRegistration.EnabledCallbacks {
if name != "*" {
enabledCallbacks = append(enabledCallbacks, name)
}
}
server.isupport.Add("REGCOMMANDS", "CREATE,VERIFY")
server.isupport.Add("REGCALLBACKS", strings.Join(enabledCallbacks, ","))
server.isupport.Add("REGCREDTYPES", "passphrase,certfp")
}
server.isupport.RegenerateCachedReply()
return server
}
func loadChannelList(channel *Channel, list string, maskMode ChannelMode) {
if list == "" {
return
}
channel.lists[maskMode].AddAll(strings.Split(list, " "))
}
func (server *Server) Shutdown() {
//TODO(dan): Make sure we disallow new nicks
for _, client := range server.clients.byNick {
client.Notice("Server is shutting down")
}
if err := server.store.Close(); err != nil {
Log.error.Println("Server.Shutdown store.Close: error:", err)
}
}
func (server *Server) Run() {
// defer closing db/store
defer server.store.Close()
done := false
for !done {
select {
case <-server.signals:
server.Shutdown()
done = true
case conn := <-server.newConns:
NewClient(server, conn.Conn, conn.IsTLS)
/*TODO(dan): LOOK AT THIS MORE CLOSELY
case cmd := <-server.commands:
server.processCommand(cmd)
*/
case client := <-server.idle:
client.Idle()
}
}
}
//
// listen goroutine
//
func (s *Server) listen(addr string, tlsMap map[string]*tls.Config) {
//TODO(dan): we could casemap this but... eh
config, listenTLS := tlsMap[addr]
listener, err := net.Listen("tcp", addr)
if err != nil {
log.Fatal(s, "listen error: ", err)
}
tlsString := "plaintext"
if listenTLS {
config.ClientAuth = tls.RequestClientCert
listener = tls.NewListener(listener, config)
tlsString = "TLS"
}
Log.info.Printf("%s listening on %s using %s.", s.name, addr, tlsString)
go func() {
for {
conn, err := listener.Accept()
if err != nil {
Log.error.Printf("%s accept error: %s", s.name, err)
continue
}
Log.debug.Printf("%s accept: %s", s.name, conn.RemoteAddr())
newConn := clientConn{
Conn: conn,
IsTLS: listenTLS,
}
s.newConns <- newConn
}
}()
}
//
// websocket listen goroutine
//
func (s *Server) wslisten(addr string, tlsMap map[string]*TLSListenConfig) {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" {
Log.error.Printf("%s method not allowed", s.name)
return
}
// We don't have any subprotocols, so if someone attempts to `new
// WebSocket(server, "subprotocol")` they'll break here, instead of
// getting the default, ambiguous, response from gorilla.
if v, ok := r.Header["Sec-Websocket-Protocol"]; ok {
http.Error(w, fmt.Sprintf("WebSocket subprocotols (e.g. %s) not supported", v), 400)
}
ws, err := upgrader.Upgrade(w, r, nil)
if err != nil {
Log.error.Printf("%s websocket upgrade error: %s", s.name, err)
return
}
newConn := clientConn{
Conn: WSContainer{ws},
IsTLS: false, //TODO(dan): track TLS or not here properly
}
s.newConns <- newConn
})
go func() {
config, listenTLS := tlsMap[addr]
tlsString := "plaintext"
var err error
if listenTLS {
tlsString = "TLS"
}
Log.info.Printf("%s websocket listening on %s using %s.", s.name, addr, tlsString)
if listenTLS {
err = http.ListenAndServeTLS(addr, config.Cert, config.Key, nil)
} else {
err = http.ListenAndServe(addr, nil)
}
if err != nil {
Log.error.Printf("%s listenAndServe (%s) error: %s", s.name, tlsString, err)
}
}()
}
//
// server functionality
//
func (s *Server) tryRegister(c *Client) {
if c.registered || !c.HasNick() || !c.HasUsername() ||
(c.capState == CapNegotiating) {
return
}
c.Register()
// send welcome text
//NOTE(dan): we specifically use the NICK here instead of the nickmask
// see http://modern.ircdocs.horse/#rplwelcome-001 for details on why we avoid using the nickmask
c.Send(nil, s.name, RPL_WELCOME, c.nick, fmt.Sprintf("Welcome to the Internet Relay Network %s", c.nick))
c.Send(nil, s.name, RPL_YOURHOST, c.nick, fmt.Sprintf("Your host is %s, running version %s", s.name, Ver))
c.Send(nil, s.name, RPL_CREATED, c.nick, fmt.Sprintf("This server was created %s", s.ctime.Format(time.RFC1123)))
//TODO(dan): Look at adding last optional [<channel modes with a parameter>] parameter
c.Send(nil, s.name, RPL_MYINFO, c.nick, s.name, Ver, supportedUserModesString, supportedChannelModesString)
c.RplISupport()
s.MOTD(c)
c.Send(nil, c.nickMaskString, RPL_UMODEIS, c.nick, c.ModeString())
}
func (server *Server) MOTD(client *Client) {
if len(server.motdLines) < 1 {
client.Send(nil, server.name, ERR_NOMOTD, client.nick, "MOTD File is missing")
return
}
client.Send(nil, server.name, RPL_MOTDSTART, client.nick, fmt.Sprintf("- %s Message of the day - ", server.name))
for _, line := range server.motdLines {
client.Send(nil, server.name, RPL_MOTD, client.nick, line)
}
client.Send(nil, server.name, RPL_ENDOFMOTD, client.nick, "End of MOTD command")
}
func (s *Server) Id() string {
return s.name
}
func (s *Server) Nick() string {
return s.Id()
}
//
// registration commands
//
// PASS <password>
func passHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
if client.registered {
client.Send(nil, server.name, ERR_ALREADYREGISTRED, client.nick, "You may not reregister")
return false
}
// if no password exists, skip checking
if len(server.password) == 0 {
client.authorized = true
return false
}
// check the provided password
password := []byte(msg.Params[0])
if ComparePassword(server.password, password) != nil {
client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
client.Send(nil, server.name, "ERROR", "Password incorrect")
return true
}
client.authorized = true
return false
}
// USER <username> * 0 <realname>
func userHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
if client.registered {
client.Send(nil, server.name, ERR_ALREADYREGISTRED, client.nick, "You may not reregister")
return false
}
if !client.authorized {
client.Quit("Bad password")
return true
}
if client.username != "" && client.realname != "" {
return false
}
// confirm that username is valid
//
_, err := CasefoldName(msg.Params[0])
if err != nil {
client.Send(nil, "", "ERROR", "Malformed username")
return true
}
// set user info and log client in
//TODO(dan): Could there be a race condition here with adding/removing the client?
//TODO(dan): we should do something like server.clients.Replace(client) instead
// we do it this way to ONLY replace what hasn't already been set
server.clients.Remove(client)
if !client.HasUsername() {
client.username = "~" + msg.Params[0]
// don't bother updating nickmask here, it's not valid anyway
}
if client.realname == "" {
client.realname = msg.Params[3]
}
server.clients.Add(client)
server.tryRegister(client)
return false
}
// QUIT [<reason>]
func quitHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
reason := "Quit"
if len(msg.Params) > 0 {
reason += ": " + msg.Params[0]
}
client.Quit(reason)
return true
}
//
// normal commands
//
// PING <server1> [<server2>]
func pingHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
client.Send(nil, server.name, "PONG", msg.Params...)
return false
}
// PONG <server> [ <server2> ]
func pongHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
// client gets touched when they send this command, so we don't need to do anything
return false
}
// JOIN <channel>{,<channel>} [<key>{,<key>}]
// JOIN 0
func joinHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
// handle JOIN 0
if msg.Params[0] == "0" {
for channel := range client.channels {
channel.Part(client, client.nickCasefolded)
}
return false
}
// handle regular JOINs
channels := strings.Split(msg.Params[0], ",")
var keys []string
if len(msg.Params) > 1 {
keys = strings.Split(msg.Params[1], ",")
}
for i, name := range channels {
casefoldedName, err := CasefoldChannel(name)
if err != nil {
log.Println("ISN'T CHANNEL NAME:", name)
client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, name, "No such channel")
continue
}
channel := server.channels.Get(casefoldedName)
if channel == nil {
channel = NewChannel(server, name, true)
}
var key string
if len(keys) > i {
key = keys[i]
}
channel.Join(client, key)
}
return false
}
// PART <channel>{,<channel>} [<reason>]
func partHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
channels := strings.Split(msg.Params[0], ",")
var reason string //TODO(dan): if this isn't supplied here, make sure the param doesn't exist in the PART message sent to other users
if len(msg.Params) > 1 {
reason = msg.Params[1]
}
for _, chname := range channels {
casefoldedChannelName, err := CasefoldChannel(chname)
channel := server.channels.Get(casefoldedChannelName)
if err != nil || channel == nil {
client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, "No such channel")
continue
}
channel.Part(client, reason)
}
return false
}
// TOPIC <channel> [<topic>]
func topicHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
name, err := CasefoldChannel(msg.Params[0])
channel := server.channels.Get(name)
if err != nil || channel == nil {
client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, msg.Params[0], "No such channel")
return false
}
if len(msg.Params) > 1 {
channel.SetTopic(client, msg.Params[1])
} else {
channel.GetTopic(client)
}
return false
}
// PRIVMSG <target>{,<target>} <message>
func privmsgHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
clientOnlyTags := GetClientOnlyTags(msg.Tags)
targets := strings.Split(msg.Params[0], ",")
message := msg.Params[1]
for _, targetString := range targets {
target, err := CasefoldChannel(targetString)
if err == nil {
channel := server.channels.Get(target)
if channel == nil {
client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, targetString, "No such channel")
continue
}
channel.PrivMsg(clientOnlyTags, client, message)
} else {
target, err = CasefoldName(targetString)
user := server.clients.Get(target)
if err != nil || user == nil {
client.Send(nil, server.name, ERR_NOSUCHNICK, target, "No such nick")
continue
}
if !user.capabilities[MessageTags] {
clientOnlyTags = nil
}
user.SendFromClient(client, clientOnlyTags, client.nickMaskString, "PRIVMSG", user.nick, message)
if user.flags[Away] {
//TODO(dan): possibly implement cooldown of away notifications to users
client.Send(nil, server.name, RPL_AWAY, user.nick, user.awayMessage)
}
}
}
return false
}
func (client *Client) WhoisChannelsNames(target *Client) []string {
isMultiPrefix := target.capabilities[MultiPrefix]
var chstrs []string
index := 0
for channel := range client.channels {
// channel is secret and the target can't see it
if !target.flags[Operator] && channel.flags[Secret] && !channel.members.Has(target) {
continue
}
chstrs = append(chstrs, channel.members[client].Prefixes(isMultiPrefix)+channel.name)
index++
}
return chstrs
}
// WHOIS [ <target> ] <mask> *( "," <mask> )
func whoisHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
var masksString string
//var target string
if len(msg.Params) > 1 {
//target = msg.Params[0]
masksString = msg.Params[1]
} else {
masksString = msg.Params[0]
}
if client.flags[Operator] {
masks := strings.Split(masksString, ",")
for _, mask := range masks {
casefoldedMask, err := Casefold(mask)
if err != nil {
client.Send(nil, client.server.name, ERR_NOSUCHNICK, mask, "No such nick")
continue
}
matches := server.clients.FindAll(casefoldedMask)
if len(matches) == 0 {
client.Send(nil, client.server.name, ERR_NOSUCHNICK, mask, "No such nick")
continue
}
for mclient := range matches {
client.getWhoisOf(mclient)
}
}
} else {
// specifically treat this as a single lookup rather than splitting as we do above
// this is by design
casefoldedMask, err := Casefold(masksString)
mclient := server.clients.Get(casefoldedMask)
if err != nil || mclient == nil {
client.Send(nil, client.server.name, ERR_NOSUCHNICK, masksString, "No such nick")
// fall through, ENDOFWHOIS is always sent
} else {
client.getWhoisOf(mclient)
}
}
client.Send(nil, server.name, RPL_ENDOFWHOIS, client.nick, masksString, "End of /WHOIS list")
return false
}
func (client *Client) getWhoisOf(target *Client) {
client.Send(nil, client.server.name, RPL_WHOISUSER, client.nick, target.nick, target.username, target.hostname, "*", target.realname)
//TODO(dan): ...one channel per reply? really?
for _, line := range client.WhoisChannelsNames(target) {
client.Send(nil, client.server.name, RPL_WHOISCHANNELS, client.nick, target.nick, line)
}
if target.flags[Operator] {
client.Send(nil, client.server.name, RPL_WHOISOPERATOR, client.nick, target.nick, "is an IRC operator")
}
if target.certfp != "" && (client.flags[Operator] || client == target) {
client.Send(nil, client.server.name, RPL_WHOISCERTFP, client.nick, target.nick, fmt.Sprintf("has client certificate fingerprint %s", target.certfp))
}
client.Send(nil, client.server.name, RPL_WHOISIDLE, client.nick, target.nick, strconv.FormatUint(target.IdleSeconds(), 10), strconv.FormatInt(target.SignonTime(), 10), "seconds idle, signon time")
}
// <channel> <user> <host> <server> <nick> ( "H" / "G" ) ["*"] [ ( "@" / "+" ) ]
// :<hopcount> <real name>
func (target *Client) RplWhoReply(channel *Channel, client *Client) {
channelName := "*"
flags := ""
if client.flags[Away] {
flags = "G"
} else {
flags = "H"
}
if client.flags[Operator] {
flags += "*"
}
if channel != nil {
flags += channel.members[client].Prefixes(target.capabilities[MultiPrefix])
channelName = channel.name
}
target.Send(nil, target.server.name, RPL_WHOREPLY, target.nick, channelName, client.username, client.hostname, client.server.name, client.nick, flags, strconv.Itoa(client.hops)+" "+client.realname)
}
func whoChannel(client *Client, channel *Channel, friends ClientSet) {
for member := range channel.members {
if !client.flags[Invisible] || friends[client] {
client.RplWhoReply(channel, member)
}
}
}
// WHO [ <mask> [ "o" ] ]
func whoHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
friends := client.Friends()
var mask string
if len(msg.Params) > 0 {
casefoldedMask, err := Casefold(msg.Params[0])
if err != nil {
client.Send(nil, server.name, ERR_UNKNOWNERROR, "WHO", "Mask isn't valid")
return false
}
mask = casefoldedMask
}
//TODO(dan): is this used and would I put this param in the Modern doc?
// if not, can we remove it?
//var operatorOnly bool
//if len(msg.Params) > 1 && msg.Params[1] == "o" {
// operatorOnly = true
//}
if mask == "" {
for _, channel := range server.channels {
whoChannel(client, channel, friends)
}
} else if mask[0] == '#' {
// TODO implement wildcard matching
//TODO(dan): ^ only for opers
channel := server.channels.Get(mask)
if channel != nil {
whoChannel(client, channel, friends)
}
} else {
for mclient := range server.clients.FindAll(mask) {
client.RplWhoReply(nil, mclient)
}
}
client.Send(nil, server.name, RPL_ENDOFWHO, client.nick, mask, "End of WHO list")
return false
}
// OPER <name> <password>
func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
name, err := CasefoldName(msg.Params[0])
if err != nil {
client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
return true
}
hash := server.operators[name]
password := []byte(msg.Params[1])
err = ComparePassword(hash, password)
if (hash == nil) || (err != nil) {
client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
return true
}
client.flags[Operator] = true
client.Send(nil, server.name, RPL_YOUREOPER, client.nick, "You are now an IRC operator")
//TODO(dan): Should this be sent automagically as part of setting the flag/mode?
modech := ModeChanges{&ModeChange{
mode: Operator,
op: Add,
}}
client.Send(nil, server.name, "MODE", client.nick, modech.String())
return false
}
// AWAY [<message>]
func awayHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
var isAway bool
var text string
if len(msg.Params) > 0 {
isAway = true
text = msg.Params[0]
if len(text) > server.limits.AwayLen {
text = text[:server.limits.AwayLen]
}
}
if isAway {
client.flags[Away] = true
} else {
delete(client.flags, Away)
}
client.awayMessage = text
var op ModeOp
if client.flags[Away] {
op = Add
client.Send(nil, server.name, RPL_NOWAWAY, client.nick, "You have been marked as being away")
} else {
op = Remove
client.Send(nil, server.name, RPL_UNAWAY, client.nick, "You are no longer marked as being away")
}
//TODO(dan): Should this be sent automagically as part of setting the flag/mode?
modech := ModeChanges{&ModeChange{
mode: Away,
op: op,
}}
client.Send(nil, server.name, "MODE", client.nick, client.nick, modech.String())
// dispatch away-notify
for friend := range client.Friends(AwayNotify) {
if client.flags[Away] {
friend.SendFromClient(client, nil, client.nickMaskString, "AWAY", client.awayMessage)
} else {
friend.SendFromClient(client, nil, client.nickMaskString, "AWAY")
}
}
return false
}
// ISON <nick>{ <nick>}
func isonHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
var nicks = msg.Params
var err error
var casefoldedNick string
ison := make([]string, 0)
for _, nick := range nicks {
casefoldedNick, err = CasefoldName(nick)
if err != nil {
continue
}
if iclient := server.clients.Get(casefoldedNick); iclient != nil {
ison = append(ison, iclient.nick)
}
}
client.Send(nil, server.name, RPL_ISON, client.nick, strings.Join(nicks, " "))
return false
}
// MOTD [<target>]
func motdHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
//TODO(dan): hook this up when we have multiple servers I guess???
//var target string
//if len(msg.Params) > 0 {
// target = msg.Params[0]
//}
server.MOTD(client)
return false
}
// NOTICE <target>{,<target>} <message>
func noticeHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
clientOnlyTags := GetClientOnlyTags(msg.Tags)
targets := strings.Split(msg.Params[0], ",")
message := msg.Params[1]
for _, targetString := range targets {
target, cerr := CasefoldChannel(targetString)
if cerr == nil {
channel := server.channels.Get(target)
if channel == nil {
// errors silently ignored with NOTICE as per RFC
continue
}
channel.PrivMsg(clientOnlyTags, client, message)
} else {
target, err := CasefoldName(targetString)
if err != nil {
continue
}
user := server.clients.Get(target)
if user == nil {
// errors silently ignored with NOTICE as per RFC
continue
}
if !user.capabilities[MessageTags] {
clientOnlyTags = nil
}
user.SendFromClient(client, clientOnlyTags, client.nickMaskString, "NOTICE", user.nick, message)
}
}
return false
}
// KICK <channel>{,<channel>} <user>{,<user>} [<comment>]
func kickHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
channels := strings.Split(msg.Params[0], ",")
users := strings.Split(msg.Params[1], ",")
if (len(channels) != len(users)) && (len(users) != 1) {
client.Send(nil, server.name, ERR_NEEDMOREPARAMS, client.nick, "KICK", "Not enough parameters")
return false
}
kicks := make(map[string]string)
for index, channel := range channels {
if len(users) == 1 {
kicks[channel] = users[0]
} else {
kicks[channel] = users[index]
}
}
var comment string
if len(msg.Params) > 2 {
comment = msg.Params[2]
}
for chname, nickname := range kicks {
casefoldedChname, err := CasefoldChannel(chname)
channel := server.channels.Get(casefoldedChname)
if err != nil || channel == nil {
client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, "No such channel")
continue
}
casefoldedNickname, err := CasefoldName(nickname)
target := server.clients.Get(casefoldedNickname)
if err != nil || target == nil {
client.Send(nil, server.name, ERR_NOSUCHNICK, nickname, "No such nick")
continue
}
// make sure client has privs to kick the given user
//TODO(dan): split this into a separate function that checks if users have privs
// over other users, useful for things like -aoh as well
var hasPrivs bool
for _, mode := range ChannelPrivModes {
if channel.members[client][mode] {
hasPrivs = true
// admins cannot kick other admins
if mode == ChannelAdmin && channel.members[target][ChannelAdmin] {
hasPrivs = false
}
break
} else if channel.members[target][mode] {
break
}
}
if hasPrivs {
if comment == "" {
comment = nickname
}
channel.Kick(client, target, comment)
} else {
client.Send(nil, client.server.name, ERR_CHANOPRIVSNEEDED, chname, "You're not a channel operator")
}
}
return false
}
// LIST [<channel>{,<channel>} [<server>]]
func listHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
var channels []string
if len(msg.Params) > 0 {
channels = strings.Split(msg.Params[0], ",")
}
var target string
if len(msg.Params) > 1 {
target = msg.Params[1]
}
//TODO(dan): target server when we have multiple servers
//TODO(dan): we should continue just fine if it's this current server though
if target != "" {
client.Send(nil, server.name, ERR_NOSUCHSERVER, client.nick, target, "No such server")
return false
}
if len(channels) == 0 {
for _, channel := range server.channels {
if !client.flags[Operator] && channel.flags[Secret] {
continue
}
client.RplList(channel)
}
} else {
for _, chname := range channels {
casefoldedChname, err := CasefoldChannel(chname)
channel := server.channels.Get(casefoldedChname)
if err != nil || channel == nil || (!client.flags[Operator] && channel.flags[Secret]) {
client.Send(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, "No such channel")
continue
}
client.RplList(channel)
}
}