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handlers.go
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handlers.go
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// Copyright (c) 2012-2014 Jeremy Latt
// Copyright (c) 2014-2015 Edmund Huber
// Copyright (c) 2016-2018 Daniel Oaks <daniel@danieloaks.net>
// Copyright (c) 2017-2018 Shivaram Lingamneni <slingamn@cs.stanford.edu>
// released under the MIT license
package irc
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"net"
"os"
"runtime"
"runtime/debug"
"runtime/pprof"
"sort"
"strconv"
"strings"
"time"
"github.com/goshuirc/irc-go/ircfmt"
"github.com/goshuirc/irc-go/ircmatch"
"github.com/goshuirc/irc-go/ircmsg"
"github.com/oragono/oragono/irc/caps"
"github.com/oragono/oragono/irc/custime"
"github.com/oragono/oragono/irc/modes"
"github.com/oragono/oragono/irc/sno"
"github.com/oragono/oragono/irc/utils"
"github.com/tidwall/buntdb"
"golang.org/x/crypto/bcrypt"
)
// ACC [REGISTER|VERIFY] ...
func accHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// make sure reg is enabled
if !server.AccountConfig().Registration.Enabled {
rb.Add(nil, server.name, ERR_REG_UNSPECIFIED_ERROR, client.nick, "*", client.t("Account registration is disabled"))
return false
}
subcommand := strings.ToLower(msg.Params[0])
if subcommand == "register" {
return accRegisterHandler(server, client, msg, rb)
} else if subcommand == "verify" {
return accVerifyHandler(server, client, msg, rb)
} else {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, "ACC", msg.Params[0], client.t("Unknown subcommand"))
}
return false
}
// helper function to parse ACC callbacks, e.g., mailto:person@example.com, tel:16505551234
func parseCallback(spec string, config *AccountConfig) (callbackNamespace string, callbackValue string) {
callback := strings.ToLower(spec)
if callback == "*" {
callbackNamespace = "*"
} else if strings.Contains(callback, ":") {
callbackValues := strings.SplitN(callback, ":", 2)
callbackNamespace, callbackValue = callbackValues[0], callbackValues[1]
} else {
// "the IRC server MAY choose to use mailto as a default"
callbackNamespace = "mailto"
callbackValue = callback
}
// ensure the callback namespace is valid
// need to search callback list, maybe look at using a map later?
for _, name := range config.Registration.EnabledCallbacks {
if callbackNamespace == name {
return
}
}
// error value
callbackNamespace = ""
return
}
// ACC REGISTER <accountname> [callback_namespace:]<callback> [cred_type] :<credential>
func accRegisterHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// clients can't reg new accounts if they're already logged in
if client.LoggedIntoAccount() {
rb.Add(nil, server.name, ERR_REG_UNSPECIFIED_ERROR, client.nick, "*", client.t("You're already logged into an account"))
return false
}
// get and sanitise account name
account := strings.TrimSpace(msg.Params[1])
casefoldedAccount, err := CasefoldName(account)
// probably don't need explicit check for "*" here... but let's do it anyway just to make sure
if err != nil || msg.Params[1] == "*" {
rb.Add(nil, server.name, ERR_REG_UNSPECIFIED_ERROR, client.nick, account, client.t("Account name is not valid"))
return false
}
if len(msg.Params) < 4 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.nick, msg.Command, client.t("Not enough parameters"))
return false
}
callbackSpec := msg.Params[2]
callbackNamespace, callbackValue := parseCallback(callbackSpec, server.AccountConfig())
if callbackNamespace == "" {
rb.Add(nil, server.name, ERR_REG_INVALID_CALLBACK, client.nick, account, callbackSpec, client.t("Callback namespace is not supported"))
return false
}
// get credential type/value
var credentialType, credentialValue string
if len(msg.Params) > 4 {
credentialType = strings.ToLower(msg.Params[3])
credentialValue = msg.Params[4]
} else {
// exactly 4 params
credentialType = "passphrase" // default from the spec
credentialValue = msg.Params[3]
}
// ensure the credential type is valid
var credentialValid bool
for _, name := range server.AccountConfig().Registration.EnabledCredentialTypes {
if credentialType == name {
credentialValid = true
}
}
if credentialType == "certfp" && client.certfp == "" {
rb.Add(nil, server.name, ERR_REG_INVALID_CRED_TYPE, client.nick, credentialType, callbackNamespace, client.t("You are not using a TLS certificate"))
return false
}
if !credentialValid {
rb.Add(nil, server.name, ERR_REG_INVALID_CRED_TYPE, client.nick, credentialType, callbackNamespace, client.t("Credential type is not supported"))
return false
}
var passphrase, certfp string
if credentialType == "certfp" {
certfp = client.certfp
} else if credentialType == "passphrase" {
passphrase = credentialValue
}
err = server.accounts.Register(client, account, callbackNamespace, callbackValue, passphrase, certfp)
if err != nil {
msg := "Unknown"
code := ERR_UNKNOWNERROR
if err == errCertfpAlreadyExists {
msg = "An account already exists for your certificate fingerprint"
} else if err == errAccountAlreadyRegistered {
msg = "Account already exists"
code = ERR_ACCOUNT_ALREADY_EXISTS
} else if err == errAccountBadPassphrase {
msg = "Passphrase contains forbidden characters or is otherwise invalid"
}
if err == errAccountAlreadyRegistered || err == errAccountCreation || err == errCertfpAlreadyExists {
msg = err.Error()
}
rb.Add(nil, server.name, code, client.nick, "ACC", "REGISTER", client.t(msg))
return false
}
// automatically complete registration
if callbackNamespace == "*" {
err := server.accounts.Verify(client, casefoldedAccount, "")
if err != nil {
return false
}
sendSuccessfulRegResponse(client, rb, false)
} else {
messageTemplate := client.t("Account created, pending verification; verification code has been sent to %s:%s")
message := fmt.Sprintf(messageTemplate, callbackNamespace, callbackValue)
rb.Add(nil, server.name, RPL_REG_VERIFICATION_REQUIRED, client.nick, casefoldedAccount, message)
}
return false
}
// helper function to dispatch messages when a client successfully registers
func sendSuccessfulRegResponse(client *Client, rb *ResponseBuffer, forNS bool) {
if forNS {
rb.Notice(client.t("Account created"))
} else {
rb.Add(nil, client.server.name, RPL_REGISTRATION_SUCCESS, client.nick, client.AccountName(), client.t("Account created"))
}
sendSuccessfulSaslAuth(client, rb, forNS)
}
// sendSuccessfulSaslAuth means that a SASL auth attempt completed successfully, and is used to dispatch messages.
func sendSuccessfulSaslAuth(client *Client, rb *ResponseBuffer, forNS bool) {
account := client.AccountName()
if forNS {
rb.Notice(fmt.Sprintf(client.t("You're now logged in as %s"), client.AccountName()))
} else {
rb.Add(nil, client.server.name, RPL_LOGGEDIN, client.nick, client.nickMaskString, account, fmt.Sprintf(client.t("You are now logged in as %s"), account))
rb.Add(nil, client.server.name, RPL_SASLSUCCESS, client.nick, client.t("Authentication successful"))
}
// dispatch account-notify
for friend := range client.Friends(caps.AccountNotify) {
friend.Send(nil, client.nickMaskString, "ACCOUNT", account)
}
client.server.snomasks.Send(sno.LocalAccounts, fmt.Sprintf(ircfmt.Unescape("Client $c[grey][$r%s$c[grey]] logged into account $c[grey][$r%s$c[grey]]"), client.nickMaskString, account))
}
// ACC VERIFY <accountname> <auth_code>
func accVerifyHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
account := strings.TrimSpace(msg.Params[1])
err := server.accounts.Verify(client, account, msg.Params[2])
var code string
var message string
if err == errAccountVerificationInvalidCode {
code = ERR_ACCOUNT_INVALID_VERIFY_CODE
message = err.Error()
} else if err == errAccountAlreadyVerified {
code = ERR_ACCOUNT_ALREADY_VERIFIED
message = err.Error()
} else if err != nil {
code = ERR_UNKNOWNERROR
message = errAccountVerificationFailed.Error()
}
if err == nil {
sendSuccessfulRegResponse(client, rb, false)
} else {
rb.Add(nil, server.name, code, client.nick, account, client.t(message))
}
return false
}
// AUTHENTICATE [<mechanism>|<data>|*]
func authenticateHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// sasl abort
if !server.AccountConfig().AuthenticationEnabled || len(msg.Params) == 1 && msg.Params[0] == "*" {
rb.Add(nil, server.name, ERR_SASLABORTED, client.nick, client.t("SASL authentication aborted"))
client.saslInProgress = false
client.saslMechanism = ""
client.saslValue = ""
return false
}
// start new sasl session
if !client.saslInProgress {
mechanism := strings.ToUpper(msg.Params[0])
_, mechanismIsEnabled := EnabledSaslMechanisms[mechanism]
if mechanismIsEnabled {
client.saslInProgress = true
client.saslMechanism = mechanism
rb.Add(nil, server.name, "AUTHENTICATE", "+")
} else {
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, client.t("SASL authentication failed"))
}
return false
}
// continue existing sasl session
rawData := msg.Params[0]
if len(rawData) > 400 {
rb.Add(nil, server.name, ERR_SASLTOOLONG, client.nick, client.t("SASL message too long"))
client.saslInProgress = false
client.saslMechanism = ""
client.saslValue = ""
return false
} else if len(rawData) == 400 {
client.saslValue += rawData
// allow 4 'continuation' lines before rejecting for length
if len(client.saslValue) > 400*4 {
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, client.t("SASL authentication failed: Passphrase too long"))
client.saslInProgress = false
client.saslMechanism = ""
client.saslValue = ""
return false
}
return false
}
if rawData != "+" {
client.saslValue += rawData
}
var data []byte
var err error
if client.saslValue != "+" {
data, err = base64.StdEncoding.DecodeString(client.saslValue)
if err != nil {
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, client.t("SASL authentication failed: Invalid b64 encoding"))
client.saslInProgress = false
client.saslMechanism = ""
client.saslValue = ""
return false
}
}
// call actual handler
handler, handlerExists := EnabledSaslMechanisms[client.saslMechanism]
// like 100% not required, but it's good to be safe I guess
if !handlerExists {
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, client.t("SASL authentication failed"))
client.saslInProgress = false
client.saslMechanism = ""
client.saslValue = ""
return false
}
// let the SASL handler do its thing
exiting := handler(server, client, client.saslMechanism, data, rb)
if client.LoggedIntoAccount() && server.AccountConfig().SkipServerPassword {
client.SetAuthorized(true)
}
// wait 'til SASL is done before emptying the sasl vars
client.saslInProgress = false
client.saslMechanism = ""
client.saslValue = ""
return exiting
}
// AUTHENTICATE PLAIN
func authPlainHandler(server *Server, client *Client, mechanism string, value []byte, rb *ResponseBuffer) bool {
splitValue := bytes.Split(value, []byte{'\000'})
var accountKey, authzid string
if len(splitValue) == 3 {
accountKey = string(splitValue[0])
authzid = string(splitValue[1])
if accountKey == "" {
accountKey = authzid
} else if accountKey != authzid {
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, client.t("SASL authentication failed: authcid and authzid should be the same"))
return false
}
} else {
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, client.t("SASL authentication failed: Invalid auth blob"))
return false
}
password := string(splitValue[2])
err := server.accounts.AuthenticateByPassphrase(client, accountKey, password)
if err != nil {
msg := authErrorToMessage(server, err)
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, fmt.Sprintf("%s: %s", client.t("SASL authentication failed"), client.t(msg)))
return false
}
sendSuccessfulSaslAuth(client, rb, false)
return false
}
func authErrorToMessage(server *Server, err error) (msg string) {
if err == errAccountDoesNotExist || err == errAccountUnverified || err == errAccountInvalidCredentials {
msg = err.Error()
} else {
server.logger.Error("internal", fmt.Sprintf("sasl authentication failure: %v", err))
msg = "Unknown"
}
return
}
// AUTHENTICATE EXTERNAL
func authExternalHandler(server *Server, client *Client, mechanism string, value []byte, rb *ResponseBuffer) bool {
if client.certfp == "" {
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, client.t("SASL authentication failed, you are not connecting with a certificate"))
return false
}
err := server.accounts.AuthenticateByCertFP(client)
if err != nil {
msg := authErrorToMessage(server, err)
rb.Add(nil, server.name, ERR_SASLFAIL, client.nick, fmt.Sprintf("%s: %s", client.t("SASL authentication failed"), client.t(msg)))
return false
}
sendSuccessfulSaslAuth(client, rb, false)
return false
}
// AWAY [<message>]
func awayHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
var isAway bool
var text string
if len(msg.Params) > 0 {
isAway = true
text = msg.Params[0]
awayLen := server.Limits().AwayLen
if len(text) > awayLen {
text = text[:awayLen]
}
}
client.SetMode(modes.Away, isAway)
client.awayMessage = text
var op modes.ModeOp
if isAway {
op = modes.Add
rb.Add(nil, server.name, RPL_NOWAWAY, client.nick, client.t("You have been marked as being away"))
} else {
op = modes.Remove
rb.Add(nil, server.name, RPL_UNAWAY, client.nick, client.t("You are no longer marked as being away"))
}
//TODO(dan): Should this be sent automagically as part of setting the flag/mode?
modech := modes.ModeChanges{modes.ModeChange{
Mode: modes.Away,
Op: op,
}}
rb.Add(nil, server.name, "MODE", client.nick, modech.String())
// dispatch away-notify
for friend := range client.Friends(caps.AwayNotify) {
if isAway {
friend.SendFromClient("", client, nil, "AWAY", client.awayMessage)
} else {
friend.SendFromClient("", client, nil, "AWAY")
}
}
return false
}
// CAP <subcmd> [<caps>]
func capHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
subCommand := strings.ToUpper(msg.Params[0])
capabilities := caps.NewSet()
var capString string
var badCaps []string
if len(msg.Params) > 1 {
capString = msg.Params[1]
strs := strings.Fields(capString)
for _, str := range strs {
capab, err := caps.NameToCapability(str)
if err != nil || !SupportedCapabilities.Has(capab) {
badCaps = append(badCaps, str)
} else {
capabilities.Enable(capab)
}
}
}
switch subCommand {
case "LS":
if !client.registered {
client.capState = caps.NegotiatingState
}
if len(msg.Params) > 1 && msg.Params[1] == "302" {
client.capVersion = 302
}
// weechat 1.4 has a bug here where it won't accept the CAP reply unless it contains
// the server.name source... otherwise it doesn't respond to the CAP message with
// anything and just hangs on connection.
//TODO(dan): limit number of caps and send it multiline in 3.2 style as appropriate.
rb.Add(nil, server.name, "CAP", client.nick, subCommand, SupportedCapabilities.String(client.capVersion, CapValues))
case "LIST":
rb.Add(nil, server.name, "CAP", client.nick, subCommand, client.capabilities.String(caps.Cap301, CapValues)) // values not sent on LIST so force 3.1
case "REQ":
if !client.registered {
client.capState = caps.NegotiatingState
}
// make sure all capabilities actually exist
if len(badCaps) > 0 {
rb.Add(nil, server.name, "CAP", client.nick, "NAK", capString)
return false
}
client.capabilities.Union(capabilities)
rb.Add(nil, server.name, "CAP", client.nick, "ACK", capString)
case "END":
if !client.Registered() {
client.capState = caps.NegotiatedState
}
default:
rb.Add(nil, server.name, ERR_INVALIDCAPCMD, client.nick, subCommand, client.t("Invalid CAP subcommand"))
}
return false
}
// DEBUG <subcmd>
func debugHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
param := strings.ToUpper(msg.Params[0])
switch param {
case "GCSTATS":
stats := debug.GCStats{
Pause: make([]time.Duration, 10),
PauseQuantiles: make([]time.Duration, 5),
}
debug.ReadGCStats(&stats)
rb.Notice(fmt.Sprintf("last GC: %s", stats.LastGC.Format(time.RFC1123)))
rb.Notice(fmt.Sprintf("num GC: %d", stats.NumGC))
rb.Notice(fmt.Sprintf("pause total: %s", stats.PauseTotal))
rb.Notice(fmt.Sprintf("pause quantiles min%%: %s", stats.PauseQuantiles[0]))
rb.Notice(fmt.Sprintf("pause quantiles 25%%: %s", stats.PauseQuantiles[1]))
rb.Notice(fmt.Sprintf("pause quantiles 50%%: %s", stats.PauseQuantiles[2]))
rb.Notice(fmt.Sprintf("pause quantiles 75%%: %s", stats.PauseQuantiles[3]))
rb.Notice(fmt.Sprintf("pause quantiles max%%: %s", stats.PauseQuantiles[4]))
case "NUMGOROUTINE":
count := runtime.NumGoroutine()
rb.Notice(fmt.Sprintf("num goroutines: %d", count))
case "PROFILEHEAP":
profFile := "oragono.mprof"
file, err := os.Create(profFile)
if err != nil {
rb.Notice(fmt.Sprintf("error: %s", err))
break
}
defer file.Close()
pprof.Lookup("heap").WriteTo(file, 0)
rb.Notice(fmt.Sprintf("written to %s", profFile))
case "STARTCPUPROFILE":
profFile := "oragono.prof"
file, err := os.Create(profFile)
if err != nil {
rb.Notice(fmt.Sprintf("error: %s", err))
break
}
if err := pprof.StartCPUProfile(file); err != nil {
defer file.Close()
rb.Notice(fmt.Sprintf("error: %s", err))
break
}
rb.Notice(fmt.Sprintf("CPU profile writing to %s", profFile))
case "STOPCPUPROFILE":
pprof.StopCPUProfile()
rb.Notice(fmt.Sprintf("CPU profiling stopped"))
}
return false
}
// DLINE [ANDKILL] [MYSELF] [duration] <ip>/<net> [ON <server>] [reason [| oper reason]]
// DLINE LIST
func dlineHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// check oper permissions
oper := client.Oper()
if oper == nil || !oper.Class.Capabilities["oper:local_ban"] {
rb.Add(nil, server.name, ERR_NOPRIVS, client.nick, msg.Command, client.t("Insufficient oper privs"))
return false
}
currentArg := 0
// if they say LIST, we just list the current dlines
if len(msg.Params) == currentArg+1 && strings.ToLower(msg.Params[currentArg]) == "list" {
bans := server.dlines.AllBans()
if len(bans) == 0 {
rb.Notice(client.t("No DLINEs have been set!"))
}
for key, info := range bans {
rb.Notice(fmt.Sprintf(client.t("Ban - %[1]s - added by %[2]s - %[3]s"), key, info.OperName, info.BanMessage("%s")))
}
return false
}
// when setting a ban, if they say "ANDKILL" we should also kill all users who match it
var andKill bool
if len(msg.Params) > currentArg+1 && strings.ToLower(msg.Params[currentArg]) == "andkill" {
andKill = true
currentArg++
}
// when setting a ban that covers the oper's current connection, we require them to say
// "DLINE MYSELF" so that we're sure they really mean it.
var dlineMyself bool
if len(msg.Params) > currentArg+1 && strings.ToLower(msg.Params[currentArg]) == "myself" {
dlineMyself = true
currentArg++
}
// duration
duration, err := custime.ParseDuration(msg.Params[currentArg])
durationIsUsed := err == nil
if durationIsUsed {
currentArg++
}
// get host
if len(msg.Params) < currentArg+1 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.nick, msg.Command, client.t("Not enough parameters"))
return false
}
hostString := msg.Params[currentArg]
currentArg++
// check host
var hostAddr net.IP
var hostNet *net.IPNet
_, hostNet, err = net.ParseCIDR(hostString)
if err != nil {
hostAddr = net.ParseIP(hostString)
}
if hostAddr == nil && hostNet == nil {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, client.t("Could not parse IP address or CIDR network"))
return false
}
if hostNet == nil {
hostString = hostAddr.String()
if !dlineMyself && hostAddr.Equal(client.IP()) {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, client.t("This ban matches you. To DLINE yourself, you must use the command: /DLINE MYSELF <arguments>"))
return false
}
} else {
hostString = hostNet.String()
if !dlineMyself && hostNet.Contains(client.IP()) {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, client.t("This ban matches you. To DLINE yourself, you must use the command: /DLINE MYSELF <arguments>"))
return false
}
}
// check remote
if len(msg.Params) > currentArg && msg.Params[currentArg] == "ON" {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, client.t("Remote servers not yet supported"))
return false
}
// get comment(s)
reason := "No reason given"
operReason := "No reason given"
if len(msg.Params) > currentArg {
tempReason := strings.TrimSpace(msg.Params[currentArg])
if len(tempReason) > 0 && tempReason != "|" {
tempReasons := strings.SplitN(tempReason, "|", 2)
if tempReasons[0] != "" {
reason = tempReasons[0]
}
if len(tempReasons) > 1 && tempReasons[1] != "" {
operReason = tempReasons[1]
} else {
operReason = reason
}
}
}
operName := oper.Name
if operName == "" {
operName = server.name
}
// assemble ban info
var banTime *IPRestrictTime
if durationIsUsed {
banTime = &IPRestrictTime{
Duration: duration,
Expires: time.Now().Add(duration),
}
}
info := IPBanInfo{
Reason: reason,
OperReason: operReason,
OperName: operName,
Time: banTime,
}
// save in datastore
err = server.store.Update(func(tx *buntdb.Tx) error {
dlineKey := fmt.Sprintf(keyDlineEntry, hostString)
// assemble json from ban info
b, err := json.Marshal(info)
if err != nil {
return err
}
tx.Set(dlineKey, string(b), nil)
return nil
})
if err != nil {
rb.Notice(fmt.Sprintf(client.t("Could not successfully save new D-LINE: %s"), err.Error()))
return false
}
if hostNet == nil {
server.dlines.AddIP(hostAddr, banTime, reason, operReason, operName)
} else {
server.dlines.AddNetwork(*hostNet, banTime, reason, operReason, operName)
}
var snoDescription string
if durationIsUsed {
rb.Notice(fmt.Sprintf(client.t("Added temporary (%[1]s) D-Line for %[2]s"), duration.String(), hostString))
snoDescription = fmt.Sprintf(ircfmt.Unescape("%s [%s]$r added temporary (%s) D-Line for %s"), client.nick, operName, duration.String(), hostString)
} else {
rb.Notice(fmt.Sprintf(client.t("Added D-Line for %s"), hostString))
snoDescription = fmt.Sprintf(ircfmt.Unescape("%s [%s]$r added D-Line for %s"), client.nick, operName, hostString)
}
server.snomasks.Send(sno.LocalXline, snoDescription)
var killClient bool
if andKill {
var clientsToKill []*Client
var killedClientNicks []string
var toKill bool
for _, mcl := range server.clients.AllClients() {
if hostNet == nil {
toKill = hostAddr.Equal(mcl.IP())
} else {
toKill = hostNet.Contains(mcl.IP())
}
if toKill {
clientsToKill = append(clientsToKill, mcl)
killedClientNicks = append(killedClientNicks, mcl.nick)
}
}
for _, mcl := range clientsToKill {
mcl.exitedSnomaskSent = true
mcl.Quit(fmt.Sprintf(mcl.t("You have been banned from this server (%s)"), reason))
if mcl == client {
killClient = true
} else {
// if mcl == client, we kill them below
mcl.destroy(false)
}
}
// send snomask
sort.Strings(killedClientNicks)
server.snomasks.Send(sno.LocalKills, fmt.Sprintf(ircfmt.Unescape("%s [%s] killed %d clients with a DLINE $c[grey][$r%s$c[grey]]"), client.nick, operName, len(killedClientNicks), strings.Join(killedClientNicks, ", ")))
}
return killClient
}
// HELP [<query>]
func helpHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
argument := strings.ToLower(strings.TrimSpace(strings.Join(msg.Params, " ")))
if len(argument) < 1 {
client.sendHelp("HELPOP", client.t(`HELPOP <argument>
Get an explanation of <argument>, or "index" for a list of help topics.`), rb)
return false
}
// handle index
if argument == "index" {
if client.HasMode(modes.Operator) {
client.sendHelp("HELP", GetHelpIndex(client.languages, HelpIndexOpers), rb)
} else {
client.sendHelp("HELP", GetHelpIndex(client.languages, HelpIndex), rb)
}
return false
}
helpHandler, exists := Help[argument]
if exists && (!helpHandler.oper || (helpHandler.oper && client.HasMode(modes.Operator))) {
if helpHandler.textGenerator != nil {
client.sendHelp(strings.ToUpper(argument), client.t(helpHandler.textGenerator(client)), rb)
} else {
client.sendHelp(strings.ToUpper(argument), client.t(helpHandler.text), rb)
}
} else {
args := msg.Params
args = append(args, client.t("Help not found"))
rb.Add(nil, server.name, ERR_HELPNOTFOUND, args...)
}
return false
}
// INFO
func infoHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// we do the below so that the human-readable lines in info can be translated.
for _, line := range infoString1 {
rb.Add(nil, server.name, RPL_INFO, client.nick, line)
}
rb.Add(nil, server.name, RPL_INFO, client.nick, client.t("Oragono is released under the MIT license."))
rb.Add(nil, server.name, RPL_INFO, client.nick, "")
rb.Add(nil, server.name, RPL_INFO, client.nick, client.t("Thanks to Jeremy Latt for founding Ergonomadic, the project this is based on")+" <3")
rb.Add(nil, server.name, RPL_INFO, client.nick, "")
rb.Add(nil, server.name, RPL_INFO, client.nick, client.t("Core Developers:"))
for _, line := range infoString2 {
rb.Add(nil, server.name, RPL_INFO, client.nick, line)
}
rb.Add(nil, server.name, RPL_INFO, client.nick, client.t("Contributors and Former Developers:"))
for _, line := range infoString3 {
rb.Add(nil, server.name, RPL_INFO, client.nick, line)
}
// show translators for languages other than good ole' regular English
tlines := server.languages.Translators()
if 0 < len(tlines) {
rb.Add(nil, server.name, RPL_INFO, client.nick, client.t("Translators:"))
for _, line := range tlines {
rb.Add(nil, server.name, RPL_INFO, client.nick, " "+line)
}
rb.Add(nil, server.name, RPL_INFO, client.nick, "")
}
rb.Add(nil, server.name, RPL_ENDOFINFO, client.nick, client.t("End of /INFO"))
return false
}
// INVITE <nickname> <channel>
func inviteHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
nickname := msg.Params[0]
channelName := msg.Params[1]
casefoldedNickname, err := CasefoldName(nickname)
target := server.clients.Get(casefoldedNickname)
if err != nil || target == nil {
rb.Add(nil, server.name, ERR_NOSUCHNICK, client.nick, nickname, client.t("No such nick"))
return false
}
casefoldedChannelName, err := CasefoldChannel(channelName)
channel := server.channels.Get(casefoldedChannelName)
if err != nil || channel == nil {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, channelName, client.t("No such channel"))
return false
}
channel.Invite(target, client, rb)
return false
}
// ISON <nick>{ <nick>}
func isonHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) 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)
}
}
rb.Add(nil, server.name, RPL_ISON, client.nick, strings.Join(nicks, " "))
return false
}
// JOIN <channel>{,<channel>} [<key>{,<key>}]
func joinHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// kill JOIN 0 requests
if msg.Params[0] == "0" {
rb.Notice(client.t("JOIN 0 is not allowed"))
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 {
var key string
if len(keys) > i {
key = keys[i]
}
err := server.channels.Join(client, name, key, false, rb)
if err == errNoSuchChannel {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.Nick(), name, client.t("No such channel"))
}
}
return false
}
// SAJOIN [nick] #channel{,#channel}
func sajoinHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
var target *Client
var channelString string
if strings.HasPrefix(msg.Params[0], "#") {
target = client
channelString = msg.Params[0]
} else {
if len(msg.Params) == 1 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.Nick(), "KICK", client.t("Not enough parameters"))
return false
} else {
target = server.clients.Get(msg.Params[0])
if target == nil {
rb.Add(nil, server.name, ERR_NOSUCHNICK, client.Nick(), msg.Params[0], "No such nick")
return false
}
channelString = msg.Params[1]
rb = NewResponseBuffer(target)
}
}
channels := strings.Split(channelString, ",")
for _, chname := range channels {
server.channels.Join(target, chname, "", true, rb)
}
if client != target {
rb.Send()
}
return false
}
// KICK <channel>{,<channel>} <user>{,<user>} [<comment>]
func kickHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
channels := strings.Split(msg.Params[0], ",")
users := strings.Split(msg.Params[1], ",")
if (len(channels) != len(users)) && (len(users) != 1) {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.nick, "KICK", client.t("Not enough parameters"))
return false
}
var kicks [][]string
for index, channel := range channels {
if len(users) == 1 {
kicks = append(kicks, []string{channel, users[0]})
} else {
kicks = append(kicks, []string{channel, users[index]})
}
}
var comment string
if len(msg.Params) > 2 {
comment = msg.Params[2]
}
for _, info := range kicks {
chname := info[0]
nickname := info[1]
casefoldedChname, err := CasefoldChannel(chname)
channel := server.channels.Get(casefoldedChname)
if err != nil || channel == nil {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, client.t("No such channel"))
continue
}
casefoldedNickname, err := CasefoldName(nickname)
target := server.clients.Get(casefoldedNickname)
if err != nil || target == nil {
rb.Add(nil, server.name, ERR_NOSUCHNICK, client.nick, nickname, client.t("No such nick"))
continue
}
if comment == "" {
comment = nickname
}
channel.Kick(client, target, comment, rb)
}
return false
}
// KILL <nickname> <comment>
func killHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
nickname := msg.Params[0]
comment := "<no reason supplied>"
if len(msg.Params) > 1 {
comment = msg.Params[1]
}
casefoldedNickname, err := CasefoldName(nickname)
target := server.clients.Get(casefoldedNickname)
if err != nil || target == nil {
rb.Add(nil, client.server.name, ERR_NOSUCHNICK, client.nick, nickname, client.t("No such nick"))
return false
}
quitMsg := fmt.Sprintf("Killed (%s (%s))", client.nick, comment)
server.snomasks.Send(sno.LocalKills, fmt.Sprintf(ircfmt.Unescape("%s$r was killed by %s $c[grey][$r%s$c[grey]]"), target.nick, client.nick, comment))
target.exitedSnomaskSent = true
target.Quit(quitMsg)
target.destroy(false)
return false