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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) 2016-2017 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(` ▄▄▄ ▄▄▄· ▄▄ • ▐ ▄
▪ ▀▄ █·▐█ ▀█ ▐█ ▀ ▪▪ •█▌▐█▪
▄█▀▄ ▐▀▀▄ ▄█▀▀█ ▄█ ▀█▄ ▄█▀▄▪▐█▐▐▌ ▄█▀▄
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▀█▄▀▪.▀ ▀ ▀ ▀ ·▀▀▀▀ ▀█▄▀ ▀▀ █▪ ▀█▄▀▪
https://oragono.io/