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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 (
- "bufio"
- "crypto/tls"
- "fmt"
- "net"
- "net/http"
- _ "net/http/pprof"
- "os"
- "os/signal"
- "strconv"
- "strings"
- "sync"
- "syscall"
- "time"
- "unsafe"
-
- "github.com/goshuirc/irc-go/ircfmt"
- "github.com/oragono/oragono/irc/caps"
- "github.com/oragono/oragono/irc/connection_limits"
- "github.com/oragono/oragono/irc/logger"
- "github.com/oragono/oragono/irc/modes"
- "github.com/oragono/oragono/irc/sno"
- "github.com/tidwall/buntdb"
- )
-
- var (
- // common error line to sub values into
- errorMsg = "ERROR :%s\r\n"
-
- // supportedUserModesString acts as a cache for when we introduce users
- supportedUserModesString = modes.SupportedUserModes.String()
- // supportedChannelModesString acts as a cache for when we introduce users
- supportedChannelModesString = modes.SupportedChannelModes.String()
-
- // SupportedCapabilities are the caps we advertise.
- // MaxLine, SASL and STS may be unset during server startup / rehash.
- SupportedCapabilities = caps.NewCompleteSet()
-
- // CapValues are the actual values we advertise to v3.2 clients.
- // actual values are set during server startup.
- CapValues = caps.NewValues()
- )
-
- // ListenerWrapper wraps a listener so it can be safely reconfigured or stopped
- type ListenerWrapper struct {
- listener net.Listener
- tlsConfig *tls.Config
- isTor bool
- shouldStop bool
- // protects atomic update of tlsConfig and shouldStop:
- configMutex sync.Mutex // tier 1
- }
-
- // Server is the main Oragono server.
- type Server struct {
- accounts AccountManager
- channels ChannelManager
- channelRegistry ChannelRegistry
- clients ClientManager
- config unsafe.Pointer
- configFilename string
- connectionLimiter connection_limits.Limiter
- connectionThrottler connection_limits.Throttler
- ctime time.Time
- dlines *DLineManager
- helpIndexManager HelpIndexManager
- klines *KLineManager
- listeners map[string]*ListenerWrapper
- logger *logger.Manager
- monitorManager MonitorManager
- name string
- nameCasefolded string
- rehashMutex sync.Mutex // tier 4
- rehashSignal chan os.Signal
- pprofServer *http.Server
- resumeManager ResumeManager
- signals chan os.Signal
- snomasks SnoManager
- store *buntdb.DB
- torLimiter connection_limits.TorLimiter
- whoWas WhoWasList
- stats Stats
- semaphores ServerSemaphores
- }
-
- var (
- // ServerExitSignals are the signals the server will exit on.
- ServerExitSignals = []os.Signal{
- syscall.SIGINT,
- syscall.SIGTERM,
- syscall.SIGQUIT,
- }
- )
-
- type clientConn struct {
- Conn net.Conn
- IsTLS bool
- IsTor bool
- }
-
- // NewServer returns a new Oragono server.
- func NewServer(config *Config, logger *logger.Manager) (*Server, error) {
- // initialize data structures
- server := &Server{
- ctime: time.Now().UTC(),
- listeners: make(map[string]*ListenerWrapper),
- logger: logger,
- rehashSignal: make(chan os.Signal, 1),
- signals: make(chan os.Signal, len(ServerExitSignals)),
- }
-
- server.clients.Initialize()
- server.semaphores.Initialize()
- server.resumeManager.Initialize(server)
- server.whoWas.Initialize(config.Limits.WhowasEntries)
- server.monitorManager.Initialize()
- server.snomasks.Initialize()
-
- if err := server.applyConfig(config, true); err != nil {
- return nil, err
- }
-
- // Attempt to clean up when receiving these signals.
- signal.Notify(server.signals, ServerExitSignals...)
- signal.Notify(server.rehashSignal, syscall.SIGHUP)
-
- return server, nil
- }
-
- // setISupport sets up our RPL_ISUPPORT reply.
- func (config *Config) generateISupport() (err error) {
- maxTargetsString := strconv.Itoa(maxTargets)
-
- // add RPL_ISUPPORT tokens
- isupport := &config.Server.isupport
- isupport.Initialize()
- isupport.Add("AWAYLEN", strconv.Itoa(config.Limits.AwayLen))
- isupport.Add("CASEMAPPING", "ascii")
- isupport.Add("CHANMODES", strings.Join([]string{modes.Modes{modes.BanMask, modes.ExceptMask, modes.InviteMask}.String(), "", modes.Modes{modes.UserLimit, modes.Key}.String(), modes.Modes{modes.InviteOnly, modes.Moderated, modes.NoOutside, modes.OpOnlyTopic, modes.ChanRoleplaying, modes.Secret}.String()}, ","))
- if config.History.Enabled && config.History.ChathistoryMax > 0 {
- isupport.Add("draft/CHATHISTORY", strconv.Itoa(config.History.ChathistoryMax))
- }
- isupport.Add("CHANNELLEN", strconv.Itoa(config.Limits.ChannelLen))
- isupport.Add("CHANTYPES", "#")
- isupport.Add("ELIST", "U")
- isupport.Add("EXCEPTS", "")
- isupport.Add("INVEX", "")
- isupport.Add("KICKLEN", strconv.Itoa(config.Limits.KickLen))
- isupport.Add("MAXLIST", fmt.Sprintf("beI:%s", strconv.Itoa(config.Limits.ChanListModes)))
- isupport.Add("MAXTARGETS", maxTargetsString)
- isupport.Add("MODES", "")
- isupport.Add("MONITOR", strconv.Itoa(config.Limits.MonitorEntries))
- isupport.Add("NETWORK", config.Network.Name)
- isupport.Add("NICKLEN", strconv.Itoa(config.Limits.NickLen))
- isupport.Add("PREFIX", "(qaohv)~&@%+")
- isupport.Add("RPCHAN", "E")
- isupport.Add("RPUSER", "E")
- isupport.Add("STATUSMSG", "~&@%+")
- isupport.Add("TARGMAX", fmt.Sprintf("NAMES:1,LIST:1,KICK:1,WHOIS:1,USERHOST:10,PRIVMSG:%s,TAGMSG:%s,NOTICE:%s,MONITOR:", maxTargetsString, maxTargetsString, maxTargetsString))
- isupport.Add("TOPICLEN", strconv.Itoa(config.Limits.TopicLen))
- isupport.Add("UTF8MAPPING", casemappingName)
-
- err = isupport.RegenerateCachedReply()
- return
- }
-
- // Shutdown shuts down the server.
- func (server *Server) Shutdown() {
- //TODO(dan): Make sure we disallow new nicks
- for _, client := range server.clients.AllClients() {
- client.Notice("Server is shutting down")
- }
-
- if err := server.store.Close(); err != nil {
- server.logger.Error("shutdown", fmt.Sprintln("Could not close datastore:", err))
- }
- }
-
- // Run starts the server.
- func (server *Server) Run() {
- // defer closing db/store
- defer server.store.Close()
-
- for {
- select {
- case <-server.signals:
- server.Shutdown()
- return
-
- case <-server.rehashSignal:
- go func() {
- server.logger.Info("server", "Rehashing due to SIGHUP")
- err := server.rehash()
- if err != nil {
- server.logger.Error("server", fmt.Sprintln("Failed to rehash:", err.Error()))
- }
- }()
- }
- }
- }
-
- func (server *Server) checkBans(ipaddr net.IP) (banned bool, message string) {
- // check DLINEs
- isBanned, info := server.dlines.CheckIP(ipaddr)
- if isBanned {
- server.logger.Info("localconnect-ip", fmt.Sprintf("Client from %v rejected by d-line", ipaddr))
- return true, info.BanMessage("You are banned from this server (%s)")
- }
-
- // check connection limits
- err := server.connectionLimiter.AddClient(ipaddr, false)
- if err != nil {
- // too many connections from one client, tell the client and close the connection
- server.logger.Info("localconnect-ip", fmt.Sprintf("Client from %v rejected for connection limit", ipaddr))
- return true, "Too many clients from your network"
- }
-
- // check connection throttle
- err = server.connectionThrottler.AddClient(ipaddr)
- if err != nil {
- // too many connections too quickly from client, tell them and close the connection
- duration := server.connectionThrottler.BanDuration()
- if duration == 0 {
- return false, ""
- }
- server.dlines.AddIP(ipaddr, duration, server.connectionThrottler.BanMessage(), "Exceeded automated connection throttle", "auto.connection.throttler")
-
- // they're DLINE'd for 15 minutes or whatever, so we can reset the connection throttle now,
- // and once their temporary DLINE is finished they can fill up the throttler again
- server.connectionThrottler.ResetFor(ipaddr)
-
- // this might not show up properly on some clients, but our objective here is just to close it out before it has a load impact on us
- server.logger.Info(
- "localconnect-ip",
- fmt.Sprintf("Client from %v exceeded connection throttle, d-lining for %v", ipaddr, duration))
- return true, server.connectionThrottler.BanMessage()
- }
-
- return false, ""
- }
-
- func (server *Server) checkTorLimits() (banned bool, message string) {
- switch server.torLimiter.AddClient() {
- case connection_limits.ErrLimitExceeded:
- return true, "Too many clients from the Tor network"
- case connection_limits.ErrThrottleExceeded:
- return true, "Exceeded connection throttle for the Tor network"
- default:
- return false, ""
- }
- }
-
- //
- // IRC protocol listeners
- //
-
- // createListener starts a given listener.
- func (server *Server) createListener(addr string, tlsConfig *tls.Config, isTor bool, bindMode os.FileMode) (*ListenerWrapper, error) {
- // make listener
- var listener net.Listener
- var err error
- addr = strings.TrimPrefix(addr, "unix:")
- if strings.HasPrefix(addr, "/") {
- // https://stackoverflow.com/a/34881585
- os.Remove(addr)
- listener, err = net.Listen("unix", addr)
- if err == nil && bindMode != 0 {
- os.Chmod(addr, bindMode)
- }
- } else {
- listener, err = net.Listen("tcp", addr)
- }
- if err != nil {
- return nil, err
- }
-
- // throw our details to the server so we can be modified/killed later
- wrapper := ListenerWrapper{
- listener: listener,
- tlsConfig: tlsConfig,
- isTor: isTor,
- shouldStop: false,
- }
-
- var shouldStop bool
-
- // setup accept goroutine
- go func() {
- for {
- conn, err := listener.Accept()
-
- // synchronously access config data:
- wrapper.configMutex.Lock()
- shouldStop = wrapper.shouldStop
- tlsConfig = wrapper.tlsConfig
- isTor = wrapper.isTor
- wrapper.configMutex.Unlock()
-
- if err == nil {
- if tlsConfig != nil {
- conn = tls.Server(conn, tlsConfig)
- }
- newConn := clientConn{
- Conn: conn,
- IsTLS: tlsConfig != nil,
- IsTor: isTor,
- }
- // hand off the connection
- go server.RunClient(newConn)
- }
-
- if shouldStop {
- listener.Close()
- return
- }
- }
- }()
-
- return &wrapper, nil
- }
-
- //
- // server functionality
- //
-
- func (server *Server) tryRegister(c *Client, session *Session) (exiting bool) {
- // if the session just sent us a RESUME line, try to resume
- if session.resumeDetails != nil {
- session.tryResume()
- return // whether we succeeded or failed, either way `c` is not getting registered
- }
-
- // try to complete registration normally
- if c.preregNick == "" || !c.HasUsername() || session.capState == caps.NegotiatingState {
- return
- }
-
- // client MUST send PASS if necessary, or authenticate with SASL if necessary,
- // before completing the other registration commands
- authOutcome := c.isAuthorized(server.Config())
- var quitMessage string
- switch authOutcome {
- case authFailPass:
- quitMessage = c.t("Password incorrect")
- c.Send(nil, server.name, ERR_PASSWDMISMATCH, "*", quitMessage)
- case authFailSaslRequired, authFailTorSaslRequired:
- quitMessage = c.t("You must log in with SASL to join this server")
- c.Send(nil, c.server.name, "FAIL", "*", "ACCOUNT_REQUIRED", quitMessage)
- }
- if authOutcome != authSuccess {
- c.Quit(quitMessage, nil)
- return true
- }
-
- rb := NewResponseBuffer(session)
- nickAssigned := performNickChange(server, c, c, session, c.preregNick, rb)
- rb.Send(true)
- if !nickAssigned {
- c.preregNick = ""
- return
- }
-
- // check KLINEs
- isBanned, info := server.klines.CheckMasks(c.AllNickmasks()...)
- if isBanned {
- c.Quit(info.BanMessage(c.t("You are banned from this server (%s)")), nil)
- return true
- }
-
- if session.client != c {
- // reattached, bail out.
- // we'll play the reg burst later, on the new goroutine associated with
- // (thisSession, otherClient). This is to avoid having to transfer state
- // like nickname, hostname, etc. to show the correct values in the reg burst.
- return
- }
-
- // registration has succeeded:
- c.SetRegistered()
-
- // count new user in statistics
- server.stats.ChangeTotal(1)
- server.monitorManager.AlertAbout(c, true)
-
- server.playRegistrationBurst(session)
- return false
- }
-
- func (server *Server) playRegistrationBurst(session *Session) {
- c := session.client
- // continue registration
- d := c.Details()
- server.logger.Info("localconnect", fmt.Sprintf("Client connected [%s] [u:%s] [r:%s]", d.nick, d.username, d.realname))
- server.snomasks.Send(sno.LocalConnects, fmt.Sprintf("Client connected [%s] [u:%s] [h:%s] [ip:%s] [r:%s]", d.nick, d.username, c.RawHostname(), c.IPString(), d.realname))
-
- // 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
- session.Send(nil, server.name, RPL_WELCOME, d.nick, fmt.Sprintf(c.t("Welcome to the Internet Relay Network %s"), d.nick))
- session.Send(nil, server.name, RPL_YOURHOST, d.nick, fmt.Sprintf(c.t("Your host is %[1]s, running version %[2]s"), server.name, Ver))
- session.Send(nil, server.name, RPL_CREATED, d.nick, fmt.Sprintf(c.t("This server was created %s"), server.ctime.Format(time.RFC1123)))
- //TODO(dan): Look at adding last optional [<channel modes with a parameter>] parameter
- session.Send(nil, server.name, RPL_MYINFO, d.nick, server.name, Ver, supportedUserModesString, supportedChannelModesString)
-
- rb := NewResponseBuffer(session)
- c.RplISupport(rb)
- server.MOTD(c, rb)
- rb.Send(true)
-
- modestring := c.ModeString()
- if modestring != "+" {
- session.Send(nil, d.nickMask, RPL_UMODEIS, d.nick, modestring)
- }
- if server.logger.IsLoggingRawIO() {
- session.Send(nil, c.server.name, "NOTICE", d.nick, c.t("This server is in debug mode and is logging all user I/O. If you do not wish for everything you send to be readable by the server owner(s), please disconnect."))
- }
- }
-
- // t returns the translated version of the given string, based on the languages configured by the client.
- func (client *Client) t(originalString string) string {
- // TODO(slingamn) investigate a fast path for this, using an atomic load to see if translation is disabled
- languages := client.Languages()
- return client.server.Languages().Translate(languages, originalString)
- }
-
- // MOTD serves the Message of the Day.
- func (server *Server) MOTD(client *Client, rb *ResponseBuffer) {
- motdLines := server.Config().Server.motdLines
-
- if len(motdLines) < 1 {
- rb.Add(nil, server.name, ERR_NOMOTD, client.nick, client.t("MOTD File is missing"))
- return
- }
-
- rb.Add(nil, server.name, RPL_MOTDSTART, client.nick, fmt.Sprintf(client.t("- %s Message of the day - "), server.name))
- for _, line := range motdLines {
- rb.Add(nil, server.name, RPL_MOTD, client.nick, line)
- }
- rb.Add(nil, server.name, RPL_ENDOFMOTD, client.nick, client.t("End of MOTD command"))
- }
-
- // WhoisChannelsNames returns the common channel names between two users.
- func (client *Client) WhoisChannelsNames(target *Client, multiPrefix bool) []string {
- var chstrs []string
- for _, channel := range target.Channels() {
- // channel is secret and the target can't see it
- if !client.HasMode(modes.Operator) {
- if (target.HasMode(modes.Invisible) || channel.flags.HasMode(modes.Secret)) && !channel.hasClient(client) {
- continue
- }
- }
- chstrs = append(chstrs, channel.ClientPrefixes(target, multiPrefix)+channel.name)
- }
- return chstrs
- }
-
- func (client *Client) getWhoisOf(target *Client, rb *ResponseBuffer) {
- cnick := client.Nick()
- targetInfo := target.Details()
- rb.Add(nil, client.server.name, RPL_WHOISUSER, cnick, targetInfo.nick, targetInfo.username, targetInfo.hostname, "*", targetInfo.realname)
- tnick := targetInfo.nick
-
- whoischannels := client.WhoisChannelsNames(target, rb.session.capabilities.Has(caps.MultiPrefix))
- if whoischannels != nil {
- rb.Add(nil, client.server.name, RPL_WHOISCHANNELS, cnick, tnick, strings.Join(whoischannels, " "))
- }
- tOper := target.Oper()
- if tOper != nil {
- rb.Add(nil, client.server.name, RPL_WHOISOPERATOR, cnick, tnick, tOper.WhoisLine)
- }
- if client.HasMode(modes.Operator) || client == target {
- rb.Add(nil, client.server.name, RPL_WHOISACTUALLY, cnick, tnick, fmt.Sprintf("%s@%s", targetInfo.username, target.RawHostname()), target.IPString(), client.t("Actual user@host, Actual IP"))
- }
- if target.HasMode(modes.TLS) {
- rb.Add(nil, client.server.name, RPL_WHOISSECURE, cnick, tnick, client.t("is using a secure connection"))
- }
- if targetInfo.accountName != "*" {
- rb.Add(nil, client.server.name, RPL_WHOISACCOUNT, cnick, tnick, targetInfo.accountName, client.t("is logged in as"))
- }
- if target.HasMode(modes.Bot) {
- rb.Add(nil, client.server.name, RPL_WHOISBOT, cnick, tnick, ircfmt.Unescape(fmt.Sprintf(client.t("is a $bBot$b on %s"), client.server.Config().Network.Name)))
- }
-
- if target.certfp != "" && (client.HasMode(modes.Operator) || client == target) {
- rb.Add(nil, client.server.name, RPL_WHOISCERTFP, cnick, tnick, fmt.Sprintf(client.t("has client certificate fingerprint %s"), target.certfp))
- }
- rb.Add(nil, client.server.name, RPL_WHOISIDLE, cnick, tnick, strconv.FormatUint(target.IdleSeconds(), 10), strconv.FormatInt(target.SignonTime(), 10), client.t("seconds idle, signon time"))
- }
-
- // rplWhoReply returns the WHO reply between one user and another channel/user.
- // <channel> <user> <host> <server> <nick> ( "H" / "G" ) ["*"] [ ( "@" / "+" ) ]
- // :<hopcount> <real name>
- func (client *Client) rplWhoReply(channel *Channel, target *Client, rb *ResponseBuffer) {
- channelName := "*"
- flags := ""
-
- if target.Away() {
- flags = "G"
- } else {
- flags = "H"
- }
- if target.HasMode(modes.Operator) {
- flags += "*"
- }
-
- if channel != nil {
- // TODO is this right?
- flags += channel.ClientPrefixes(target, rb.session.capabilities.Has(caps.MultiPrefix))
- channelName = channel.name
- }
- details := target.Details()
- // hardcode a hopcount of 0 for now
- rb.Add(nil, client.server.name, RPL_WHOREPLY, client.Nick(), channelName, details.username, details.hostname, client.server.name, details.nick, flags, "0 "+details.realname)
- }
-
- // rehash reloads the config and applies the changes from the config file.
- func (server *Server) rehash() error {
- server.logger.Debug("server", "Starting rehash")
-
- // only let one REHASH go on at a time
- server.rehashMutex.Lock()
- defer server.rehashMutex.Unlock()
-
- server.logger.Debug("server", "Got rehash lock")
-
- config, err := LoadConfig(server.configFilename)
- if err != nil {
- return fmt.Errorf("Error loading config file config: %s", err.Error())
- }
-
- err = server.applyConfig(config, false)
- if err != nil {
- return fmt.Errorf("Error applying config changes: %s", err.Error())
- }
-
- return nil
- }
-
- func (server *Server) applyConfig(config *Config, initial bool) (err error) {
- if initial {
- server.configFilename = config.Filename
- server.name = config.Server.Name
- server.nameCasefolded = config.Server.nameCasefolded
- } else {
- // enforce configs that can't be changed after launch:
- currentLimits := server.Config().Limits
- if currentLimits.LineLen.Rest != config.Limits.LineLen.Rest {
- return fmt.Errorf("Maximum line length (linelen) cannot be changed after launching the server, rehash aborted")
- } else if server.name != config.Server.Name {
- return fmt.Errorf("Server name cannot be changed after launching the server, rehash aborted")
- } else if server.Config().Datastore.Path != config.Datastore.Path {
- return fmt.Errorf("Datastore path cannot be changed after launching the server, rehash aborted")
- }
- }
-
- // sanity checks complete, start modifying server state
- server.logger.Info("server", "Using config file", server.configFilename)
- oldConfig := server.Config()
-
- // first, reload config sections for functionality implemented in subpackages:
-
- err = server.connectionLimiter.ApplyConfig(config.Server.ConnectionLimiter)
- if err != nil {
- return err
- }
-
- err = server.connectionThrottler.ApplyConfig(config.Server.ConnectionThrottler)
- if err != nil {
- return err
- }
-
- tlConf := &config.Server.TorListeners
- server.torLimiter.Configure(tlConf.MaxConnections, tlConf.ThrottleDuration, tlConf.MaxConnectionsPerDuration)
-
- // reload logging config
- wasLoggingRawIO := !initial && server.logger.IsLoggingRawIO()
- err = server.logger.ApplyConfig(config.Logging)
- if err != nil {
- return err
- }
- nowLoggingRawIO := server.logger.IsLoggingRawIO()
- // notify existing clients if raw i/o logging was enabled by a rehash
- sendRawOutputNotice := !wasLoggingRawIO && nowLoggingRawIO
-
- // setup new and removed caps
- addedCaps := caps.NewSet()
- removedCaps := caps.NewSet()
- updatedCaps := caps.NewSet()
-
- // Translations
- server.logger.Debug("server", "Regenerating HELP indexes for new languages")
- server.helpIndexManager.GenerateIndices(config.languageManager)
-
- currentLanguageValue, _ := CapValues.Get(caps.Languages)
- newLanguageValue := config.languageManager.CapValue()
- if currentLanguageValue != newLanguageValue {
- updatedCaps.Add(caps.Languages)
- CapValues.Set(caps.Languages, newLanguageValue)
- }
-
- // SASL
- authPreviouslyEnabled := oldConfig != nil && oldConfig.Accounts.AuthenticationEnabled
- if config.Accounts.AuthenticationEnabled && (oldConfig == nil || !authPreviouslyEnabled) {
- // enabling SASL
- SupportedCapabilities.Enable(caps.SASL)
- CapValues.Set(caps.SASL, "PLAIN,EXTERNAL")
- addedCaps.Add(caps.SASL)
- } else if !config.Accounts.AuthenticationEnabled && (oldConfig == nil || authPreviouslyEnabled) {
- // disabling SASL
- SupportedCapabilities.Disable(caps.SASL)
- removedCaps.Add(caps.SASL)
- }
-
- nickReservationPreviouslyDisabled := oldConfig != nil && !oldConfig.Accounts.NickReservation.Enabled
- nickReservationNowEnabled := config.Accounts.NickReservation.Enabled
- if nickReservationPreviouslyDisabled && nickReservationNowEnabled {
- server.accounts.buildNickToAccountIndex()
- }
-
- hsPreviouslyDisabled := oldConfig != nil && !oldConfig.Accounts.VHosts.Enabled
- hsNowEnabled := config.Accounts.VHosts.Enabled
- if hsPreviouslyDisabled && hsNowEnabled {
- server.accounts.initVHostRequestQueue()
- }
-
- chanRegPreviouslyDisabled := oldConfig != nil && !oldConfig.Channels.Registration.Enabled
- chanRegNowEnabled := config.Channels.Registration.Enabled
- if chanRegPreviouslyDisabled && chanRegNowEnabled {
- server.channels.loadRegisteredChannels()
- }
-
- // MaxLine
- if config.Limits.LineLen.Rest != 512 {
- SupportedCapabilities.Enable(caps.MaxLine)
- value := fmt.Sprintf("%d", config.Limits.LineLen.Rest)
- CapValues.Set(caps.MaxLine, value)
- } else {
- SupportedCapabilities.Disable(caps.MaxLine)
- }
-
- // STS
- stsPreviouslyEnabled := oldConfig != nil && oldConfig.Server.STS.Enabled
- stsValue := config.Server.STS.Value()
- stsDisabledByRehash := false
- stsCurrentCapValue, _ := CapValues.Get(caps.STS)
- server.logger.Debug("server", "STS Vals", stsCurrentCapValue, stsValue, fmt.Sprintf("server[%v] config[%v]", stsPreviouslyEnabled, config.Server.STS.Enabled))
- if config.Server.STS.Enabled {
- // enabling STS
- SupportedCapabilities.Enable(caps.STS)
- if !stsPreviouslyEnabled {
- addedCaps.Add(caps.STS)
- CapValues.Set(caps.STS, stsValue)
- } else if stsValue != stsCurrentCapValue {
- // STS policy updated
- CapValues.Set(caps.STS, stsValue)
- updatedCaps.Add(caps.STS)
- }
- } else {
- // disabling STS
- SupportedCapabilities.Disable(caps.STS)
- if stsPreviouslyEnabled {
- removedCaps.Add(caps.STS)
- stsDisabledByRehash = true
- }
- }
-
- // resize history buffers as needed
- if oldConfig != nil {
- if oldConfig.History.ChannelLength != config.History.ChannelLength {
- for _, channel := range server.channels.Channels() {
- channel.history.Resize(config.History.ChannelLength)
- }
- }
- if oldConfig.History.ClientLength != config.History.ClientLength {
- for _, client := range server.clients.AllClients() {
- client.history.Resize(config.History.ClientLength)
- }
- }
- }
-
- // burst new and removed caps
- var capBurstSessions []*Session
- added := make(map[caps.Version]string)
- var removed string
-
- // updated caps get DEL'd and then NEW'd
- // so, we can just add updated ones to both removed and added lists here and they'll be correctly handled
- server.logger.Debug("server", "Updated Caps", updatedCaps.String(caps.Cap301, CapValues))
- addedCaps.Union(updatedCaps)
- removedCaps.Union(updatedCaps)
-
- if !addedCaps.Empty() || !removedCaps.Empty() {
- capBurstSessions = server.clients.AllWithCapsNotify()
-
- added[caps.Cap301] = addedCaps.String(caps.Cap301, CapValues)
- added[caps.Cap302] = addedCaps.String(caps.Cap302, CapValues)
- // removed never has values, so we leave it as Cap301
- removed = removedCaps.String(caps.Cap301, CapValues)
- }
-
- for _, sSession := range capBurstSessions {
- if stsDisabledByRehash {
- // remove STS policy
- //TODO(dan): this is an ugly hack. we can write this better.
- stsPolicy := "sts=duration=0"
- if !addedCaps.Empty() {
- added[caps.Cap302] = added[caps.Cap302] + " " + stsPolicy
- } else {
- addedCaps.Enable(caps.STS)
- added[caps.Cap302] = stsPolicy
- }
- }
- // DEL caps and then send NEW ones so that updated caps get removed/added correctly
- if !removedCaps.Empty() {
- sSession.Send(nil, server.name, "CAP", sSession.client.Nick(), "DEL", removed)
- }
- if !addedCaps.Empty() {
- sSession.Send(nil, server.name, "CAP", sSession.client.Nick(), "NEW", added[sSession.capVersion])
- }
- }
-
- // save a pointer to the new config
- server.SetConfig(config)
-
- server.logger.Info("server", "Using datastore", config.Datastore.Path)
- if initial {
- if err := server.loadDatastore(config); err != nil {
- return err
- }
- }
-
- server.setupPprofListener(config)
-
- // set RPL_ISUPPORT
- var newISupportReplies [][]string
- if oldConfig != nil {
- newISupportReplies = oldConfig.Server.isupport.GetDifference(&config.Server.isupport)
- }
-
- // we are now open for business
- err = server.setupListeners(config)
-
- if !initial {
- // push new info to all of our clients
- for _, sClient := range server.clients.AllClients() {
- for _, tokenline := range newISupportReplies {
- sClient.Send(nil, server.name, RPL_ISUPPORT, append([]string{sClient.nick}, tokenline...)...)
- }
-
- if sendRawOutputNotice {
- sClient.Notice(sClient.t("This server is in debug mode and is logging all user I/O. If you do not wish for everything you send to be readable by the server owner(s), please disconnect."))
- }
-
- if !oldConfig.Accounts.NickReservation.Enabled && config.Accounts.NickReservation.Enabled {
- sClient.nickTimer.Initialize(sClient)
- sClient.nickTimer.Touch(nil)
- } else if oldConfig.Accounts.NickReservation.Enabled && !config.Accounts.NickReservation.Enabled {
- sClient.nickTimer.Stop()
- }
- }
- }
-
- return err
- }
-
- func (server *Server) setupPprofListener(config *Config) {
- pprofListener := ""
- if config.Debug.PprofListener != nil {
- pprofListener = *config.Debug.PprofListener
- }
- if server.pprofServer != nil {
- if pprofListener == "" || (pprofListener != server.pprofServer.Addr) {
- server.logger.Info("server", "Stopping pprof listener", server.pprofServer.Addr)
- server.pprofServer.Close()
- server.pprofServer = nil
- }
- }
- if pprofListener != "" && server.pprofServer == nil {
- ps := http.Server{
- Addr: pprofListener,
- }
- go func() {
- if err := ps.ListenAndServe(); err != nil {
- server.logger.Error("server", "pprof listener failed", err.Error())
- }
- }()
- server.pprofServer = &ps
- server.logger.Info("server", "Started pprof listener", server.pprofServer.Addr)
- }
- }
-
- func (config *Config) loadMOTD() (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")
-
- if config.Server.MOTDFormatting {
- line = ircfmt.Unescape(line)
- }
-
- // "- " is the required prefix for MOTD, we just add it here to make
- // bursting it out to clients easier
- line = fmt.Sprintf("- %s", line)
-
- config.Server.motdLines = append(config.Server.motdLines, line)
- }
- }
- }
- return
- }
-
- func (server *Server) loadDatastore(config *Config) error {
- // open the datastore and load server state for which it (rather than config)
- // is the source of truth
-
- _, err := os.Stat(config.Datastore.Path)
- if os.IsNotExist(err) {
- server.logger.Warning("server", "database does not exist, creating it", config.Datastore.Path)
- err = initializeDB(config.Datastore.Path)
- if err != nil {
- return err
- }
- }
-
- db, err := OpenDatabase(config)
- if err == nil {
- server.store = db
- } else {
- return fmt.Errorf("Failed to open datastore: %s", err.Error())
- }
-
- // load *lines (from the datastores)
- server.logger.Debug("server", "Loading D/Klines")
- server.loadDLines()
- server.loadKLines()
-
- server.channelRegistry.Initialize(server)
- server.channels.Initialize(server)
- server.accounts.Initialize(server)
-
- return nil
- }
-
- func (server *Server) setupListeners(config *Config) (err error) {
- logListener := func(addr string, tlsconfig *tls.Config, isTor bool) {
- server.logger.Info("listeners",
- fmt.Sprintf("now listening on %s, tls=%t, tor=%t.", addr, (tlsconfig != nil), isTor),
- )
- }
-
- tlsListeners, err := config.TLSListeners()
- if err != nil {
- server.logger.Error("server", "failed to reload TLS certificates, aborting rehash", err.Error())
- return
- }
-
- isTorListener := func(listener string) bool {
- for _, torListener := range config.Server.TorListeners.Listeners {
- if listener == torListener {
- return true
- }
- }
- return false
- }
-
- // update or destroy all existing listeners
- for addr := range server.listeners {
- currentListener := server.listeners[addr]
- var stillConfigured bool
- for _, newaddr := range config.Server.Listen {
- if newaddr == addr {
- stillConfigured = true
- break
- }
- }
-
- // pass new config information to the listener, to be picked up after
- // its next Accept(). this is like sending over a buffered channel of
- // size 1, but where sending a second item overwrites the buffered item
- // instead of blocking.
- tlsConfig := tlsListeners[addr]
- isTor := isTorListener(addr)
- currentListener.configMutex.Lock()
- currentListener.shouldStop = !stillConfigured
- currentListener.tlsConfig = tlsConfig
- currentListener.isTor = isTor
- currentListener.configMutex.Unlock()
-
- if stillConfigured {
- logListener(addr, tlsConfig, isTor)
- } else {
- // tell the listener it should stop by interrupting its Accept() call:
- currentListener.listener.Close()
- delete(server.listeners, addr)
- server.logger.Info("listeners", fmt.Sprintf("stopped listening on %s.", addr))
- }
- }
-
- // create new listeners that were not previously configured
- for _, newaddr := range config.Server.Listen {
- _, exists := server.listeners[newaddr]
- if !exists {
- // make new listener
- isTor := isTorListener(newaddr)
- tlsConfig := tlsListeners[newaddr]
- listener, listenerErr := server.createListener(newaddr, tlsConfig, isTor, config.Server.UnixBindMode)
- if listenerErr != nil {
- server.logger.Error("server", "couldn't listen on", newaddr, listenerErr.Error())
- err = listenerErr
- continue
- }
- server.listeners[newaddr] = listener
- logListener(newaddr, tlsConfig, isTor)
- }
- }
-
- if len(tlsListeners) == 0 {
- server.logger.Warning("server", "You are not exposing an SSL/TLS listening port. You should expose at least one port (typically 6697) to accept TLS connections")
- }
-
- var usesStandardTLSPort bool
- for addr := range tlsListeners {
- if strings.HasSuffix(addr, ":6697") {
- usesStandardTLSPort = true
- break
- }
- }
- if 0 < len(tlsListeners) && !usesStandardTLSPort {
- server.logger.Warning("server", "Port 6697 is the standard TLS port for IRC. You should (also) expose port 6697 as a TLS port to ensure clients can connect securely")
- }
-
- return
- }
-
- // elistMatcher takes and matches ELIST conditions
- type elistMatcher struct {
- MinClientsActive bool
- MinClients int
- MaxClientsActive bool
- MaxClients int
- }
-
- // Matches checks whether the given channel matches our matches.
- func (matcher *elistMatcher) Matches(channel *Channel) bool {
- if matcher.MinClientsActive {
- if len(channel.Members()) < matcher.MinClients {
- return false
- }
- }
-
- if matcher.MaxClientsActive {
- if len(channel.Members()) < len(channel.members) {
- return false
- }
- }
-
- return true
- }
-
- // RplList returns the RPL_LIST numeric for the given channel.
- func (target *Client) RplList(channel *Channel, rb *ResponseBuffer) {
- // get the correct number of channel members
- var memberCount int
- if target.HasMode(modes.Operator) || channel.hasClient(target) {
- memberCount = len(channel.Members())
- } else {
- for _, member := range channel.Members() {
- if !member.HasMode(modes.Invisible) {
- memberCount++
- }
- }
- }
-
- rb.Add(nil, target.server.name, RPL_LIST, target.nick, channel.name, strconv.Itoa(memberCount), channel.topic)
- }
-
- var (
- infoString1 = strings.Split(` ▄▄▄ ▄▄▄· ▄▄ • ▐ ▄
- ▪ ▀▄ █·▐█ ▀█ ▐█ ▀ ▪▪ •█▌▐█▪
- ▄█▀▄ ▐▀▀▄ ▄█▀▀█ ▄█ ▀█▄ ▄█▀▄▪▐█▐▐▌ ▄█▀▄
- ▐█▌.▐▌▐█•█▌▐█ ▪▐▌▐█▄▪▐█▐█▌ ▐▌██▐█▌▐█▌.▐▌
- ▀█▄▀▪.▀ ▀ ▀ ▀ ·▀▀▀▀ ▀█▄▀ ▀▀ █▪ ▀█▄▀▪
-
- https://oragono.io/
- https://github.com/oragono/oragono
- https://crowdin.com/project/oragono
- `, "\n")
- infoString2 = strings.Split(` Daniel Oakley, DanielOaks, <daniel@danieloaks.net>
- Shivaram Lingamneni, slingamn, <slingamn@cs.stanford.edu>
- `, "\n")
- infoString3 = strings.Split(` 3onyc
- Edmund Huber
- Euan Kemp (euank)
- Jeremy Latt
- Martin Lindhe (martinlindhe)
- Roberto Besser (besser)
- Robin Burchell (rburchell)
- Sean Enck (enckse)
- soul9
- Vegax
- `, "\n")
- )
|