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mirror of https://github.com/ergochat/ergo.git synced 2024-12-23 11:12:44 +01:00
ergo/irc/handlers.go
2018-07-16 03:46:40 -04:00

2549 lines
76 KiB
Go

// 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/passwd"
"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() {
if server.AccountConfig().Registration.AllowMultiplePerConnection {
server.accounts.Logout(client)
} else {
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
}
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
}
// KLINE [ANDKILL] [MYSELF] [duration] <mask> [ON <server>] [reason [| oper reason]]
// KLINE LIST
func klineHandler(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 klines
if len(msg.Params) == currentArg+1 && strings.ToLower(msg.Params[currentArg]) == "list" {
bans := server.klines.AllBans()
if len(bans) == 0 {
client.Notice("No KLINEs have been set!")
}
for key, info := range bans {
client.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
// "KLINE MYSELF" so that we're sure they really mean it.
var klineMyself bool
if len(msg.Params) > currentArg+1 && strings.ToLower(msg.Params[currentArg]) == "myself" {
klineMyself = true
currentArg++
}
// duration
duration, err := custime.ParseDuration(msg.Params[currentArg])
durationIsUsed := err == nil
if durationIsUsed {
currentArg++
}
// get mask
if len(msg.Params) < currentArg+1 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.nick, msg.Command, client.t("Not enough parameters"))
return false
}
mask := strings.ToLower(msg.Params[currentArg])
currentArg++
// check mask
if !strings.Contains(mask, "!") && !strings.Contains(mask, "@") {
mask = mask + "!*@*"
} else if !strings.Contains(mask, "@") {
mask = mask + "@*"
}
matcher := ircmatch.MakeMatch(mask)
for _, clientMask := range client.AllNickmasks() {
if !klineMyself && matcher.Match(clientMask) {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, client.t("This ban matches you. To KLINE yourself, you must use the command: /KLINE 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 oper name
operName := oper.Name
if operName == "" {
operName = server.name
}
// 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
}
}
}
// 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 {
klineKey := fmt.Sprintf(keyKlineEntry, mask)
// assemble json from ban info
b, err := json.Marshal(info)
if err != nil {
return err
}
tx.Set(klineKey, string(b), nil)
return nil
})
if err != nil {
rb.Notice(fmt.Sprintf(client.t("Could not successfully save new K-LINE: %s"), err.Error()))
return false
}
server.klines.AddMask(mask, banTime, reason, operReason, operName)
var snoDescription string
if durationIsUsed {
rb.Notice(fmt.Sprintf(client.t("Added temporary (%[1]s) K-Line for %[2]s"), duration.String(), mask))
snoDescription = fmt.Sprintf(ircfmt.Unescape("%s [%s]$r added temporary (%s) K-Line for %s"), client.nick, operName, duration.String(), mask)
} else {
rb.Notice(fmt.Sprintf(client.t("Added K-Line for %s"), mask))
snoDescription = fmt.Sprintf(ircfmt.Unescape("%s [%s]$r added K-Line for %s"), client.nick, operName, mask)
}
server.snomasks.Send(sno.LocalXline, snoDescription)
var killClient bool
if andKill {
var clientsToKill []*Client
var killedClientNicks []string
for _, mcl := range server.clients.AllClients() {
for _, clientMask := range mcl.AllNickmasks() {
if matcher.Match(clientMask) {
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 KLINE $c[grey][$r%s$c[grey]]"), client.nick, operName, len(killedClientNicks), strings.Join(killedClientNicks, ", ")))
}
return killClient
}
// LANGUAGE <code>{ <code>}
func languageHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
alreadyDoneLanguages := make(map[string]bool)
var appliedLanguages []string
supportedLanguagesCount := server.languages.Count()
if supportedLanguagesCount < len(msg.Params) {
rb.Add(nil, client.server.name, ERR_TOOMANYLANGUAGES, client.nick, strconv.Itoa(supportedLanguagesCount), client.t("You specified too many languages"))
return false
}
for _, value := range msg.Params {
value = strings.ToLower(value)
// strip ~ from the language if it has it
value = strings.TrimPrefix(value, "~")
// silently ignore empty languages or those with spaces in them
if len(value) == 0 || strings.Contains(value, " ") {
continue
}
_, exists := server.languages.Info[value]
if !exists {
rb.Add(nil, client.server.name, ERR_NOLANGUAGE, client.nick, client.t("Languages are not supported by this server"))
return false
}
// if we've already applied the given language, skip it
_, exists = alreadyDoneLanguages[value]
if exists {
continue
}
appliedLanguages = append(appliedLanguages, value)
}
client.stateMutex.Lock()
if len(appliedLanguages) == 1 && appliedLanguages[0] == "en" {
// premature optimisation ahoy!
client.languages = []string{}
} else {
client.languages = appliedLanguages
}
client.stateMutex.Unlock()
params := []string{client.nick}
for _, lang := range appliedLanguages {
params = append(params, lang)
}
params = append(params, client.t("Language preferences have been set"))
rb.Add(nil, client.server.name, RPL_YOURLANGUAGESARE, params...)
return false
}
// LIST [<channel>{,<channel>}] [<elistcond>{,<elistcond>}]
func listHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// get channels
var channels []string
for _, param := range msg.Params {
if 0 < len(param) && param[0] == '#' {
for _, channame := range strings.Split(param, ",") {
if 0 < len(channame) && channame[0] == '#' {
channels = append(channels, channame)
}
}
}
}
// get elist conditions
var matcher elistMatcher
for _, param := range msg.Params {
if len(param) < 1 {
continue
}
if param[0] == '<' {
param = param[1:]
val, err := strconv.Atoi(param)
if err != nil {
continue
}
matcher.MaxClientsActive = true
matcher.MaxClients = val - 1 // -1 because < means less than the given number
}
if param[0] == '>' {
param = param[1:]
val, err := strconv.Atoi(param)
if err != nil {
continue
}
matcher.MinClientsActive = true
matcher.MinClients = val + 1 // +1 because > means more than the given number
}
}
clientIsOp := client.HasMode(modes.Operator)
if len(channels) == 0 {
for _, channel := range server.channels.Channels() {
if !clientIsOp && channel.flags.HasMode(modes.Secret) {
continue
}
if matcher.Matches(channel) {
client.RplList(channel, rb)
}
}
} else {
// limit regular users to only listing one channel
if !clientIsOp {
channels = channels[:1]
}
for _, chname := range channels {
casefoldedChname, err := CasefoldChannel(chname)
channel := server.channels.Get(casefoldedChname)
if err != nil || channel == nil || (!clientIsOp && channel.flags.HasMode(modes.Secret)) {
if len(chname) > 0 {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, client.t("No such channel"))
}
continue
}
if matcher.Matches(channel) {
client.RplList(channel, rb)
}
}
}
rb.Add(nil, server.name, RPL_LISTEND, client.nick, client.t("End of LIST"))
return false
}
// LUSERS [<mask> [<server>]]
func lusersHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
//TODO(vegax87) Fix network statistics and additional parameters
totalCount, invisibleCount, operCount := server.stats.GetStats()
rb.Add(nil, server.name, RPL_LUSERCLIENT, client.nick, fmt.Sprintf(client.t("There are %[1]d users and %[2]d invisible on %[3]d server(s)"), totalCount-invisibleCount, invisibleCount, 1))
rb.Add(nil, server.name, RPL_LUSEROP, client.nick, strconv.Itoa(operCount), client.t("IRC Operators online"))
rb.Add(nil, server.name, RPL_LUSERCHANNELS, client.nick, strconv.Itoa(server.channels.Len()), client.t("channels formed"))
rb.Add(nil, server.name, RPL_LUSERME, client.nick, fmt.Sprintf(client.t("I have %[1]d clients and %[2]d servers"), totalCount, 1))
return false
}
// MODE <target> [<modestring> [<mode arguments>...]]
func modeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
_, errChan := CasefoldChannel(msg.Params[0])
if errChan == nil {
return cmodeHandler(server, client, msg, rb)
}
return umodeHandler(server, client, msg, rb)
}
// MODE <channel> [<modestring> [<mode arguments>...]]
func cmodeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
channelName, err := CasefoldChannel(msg.Params[0])
channel := server.channels.Get(channelName)
if err != nil || channel == nil {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, msg.Params[0], client.t("No such channel"))
return false
}
// applied mode changes
applied := make(modes.ModeChanges, 0)
if 1 < len(msg.Params) {
// parse out real mode changes
params := msg.Params[1:]
changes, unknown := modes.ParseChannelModeChanges(params...)
// alert for unknown mode changes
for char := range unknown {
rb.Add(nil, server.name, ERR_UNKNOWNMODE, client.nick, string(char), client.t("is an unknown mode character to me"))
}
if len(unknown) == 1 && len(changes) == 0 {
return false
}
// apply mode changes
applied = channel.ApplyChannelModeChanges(client, msg.Command == "SAMODE", changes, rb)
}
// save changes
var includeFlags uint
for _, change := range applied {
includeFlags |= IncludeModes
if change.Mode == modes.BanMask || change.Mode == modes.ExceptMask || change.Mode == modes.InviteMask {
includeFlags |= IncludeLists
}
}
if channel.IsRegistered() && includeFlags != 0 {
go server.channelRegistry.StoreChannel(channel, includeFlags)
}
// send out changes
if len(applied) > 0 {
//TODO(dan): we should change the name of String and make it return a slice here
args := append([]string{channel.name}, strings.Split(applied.String(), " ")...)
for _, member := range channel.Members() {
if member == client {
rb.Add(nil, client.nickMaskString, "MODE", args...)
} else {
member.Send(nil, client.nickMaskString, "MODE", args...)
}
}
} else {
args := append([]string{client.nick, channel.name}, channel.modeStrings(client)...)
rb.Add(nil, client.nickMaskString, RPL_CHANNELMODEIS, args...)
rb.Add(nil, client.nickMaskString, RPL_CHANNELCREATED, client.nick, channel.name, strconv.FormatInt(channel.createdTime.Unix(), 10))
}
return false
}
// MODE <client> [<modestring> [<mode arguments>...]]
func umodeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
nickname, err := CasefoldName(msg.Params[0])
target := server.clients.Get(nickname)
if err != nil || target == nil {
if len(msg.Params[0]) > 0 {
rb.Add(nil, server.name, ERR_NOSUCHNICK, client.nick, msg.Params[0], client.t("No such nick"))
}
return false
}
targetNick := target.Nick()
hasPrivs := client == target || msg.Command == "SAMODE"
if !hasPrivs {
if len(msg.Params) > 1 {
rb.Add(nil, server.name, ERR_USERSDONTMATCH, client.nick, client.t("Can't change modes for other users"))
} else {
rb.Add(nil, server.name, ERR_USERSDONTMATCH, client.nick, client.t("Can't view modes for other users"))
}
return false
}
// applied mode changes
applied := make(modes.ModeChanges, 0)
if 1 < len(msg.Params) {
// parse out real mode changes
params := msg.Params[1:]
changes, unknown := modes.ParseUserModeChanges(params...)
// alert for unknown mode changes
for char := range unknown {
rb.Add(nil, server.name, ERR_UNKNOWNMODE, client.nick, string(char), client.t("is an unknown mode character to me"))
}
if len(unknown) == 1 && len(changes) == 0 {
return false
}
// apply mode changes
applied = ApplyUserModeChanges(client, changes, msg.Command == "SAMODE")
}
if len(applied) > 0 {
rb.Add(nil, client.nickMaskString, "MODE", targetNick, applied.String())
} else if hasPrivs {
rb.Add(nil, target.nickMaskString, RPL_UMODEIS, targetNick, target.ModeString())
if client.HasMode(modes.LocalOperator) || client.HasMode(modes.Operator) {
masks := server.snomasks.String(client)
if 0 < len(masks) {
rb.Add(nil, target.nickMaskString, RPL_SNOMASKIS, targetNick, masks, client.t("Server notice masks"))
}
}
}
return false
}
// MONITOR <subcmd> [params...]
func monitorHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
handler, exists := monitorSubcommands[strings.ToLower(msg.Params[0])]
if !exists {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.Nick(), "MONITOR", msg.Params[0], client.t("Unknown subcommand"))
return false
}
return handler(server, client, msg, rb)
}
// MONITOR - <target>{,<target>}
func monitorRemoveHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if len(msg.Params) < 2 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.Nick(), msg.Command, client.t("Not enough parameters"))
return false
}
targets := strings.Split(msg.Params[1], ",")
for _, target := range targets {
cfnick, err := CasefoldName(target)
if err != nil {
continue
}
server.monitorManager.Remove(client, cfnick)
}
return false
}
// MONITOR + <target>{,<target>}
func monitorAddHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if len(msg.Params) < 2 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.Nick(), msg.Command, client.t("Not enough parameters"))
return false
}
var online []string
var offline []string
limits := server.Limits()
targets := strings.Split(msg.Params[1], ",")
for _, target := range targets {
// check name length
if len(target) < 1 || len(targets) > limits.NickLen {
continue
}
// add target
casefoldedTarget, err := CasefoldName(target)
if err != nil {
continue
}
err = server.monitorManager.Add(client, casefoldedTarget, limits.MonitorEntries)
if err == errMonitorLimitExceeded {
rb.Add(nil, server.name, ERR_MONLISTFULL, client.Nick(), strconv.Itoa(limits.MonitorEntries), strings.Join(targets, ","))
break
} else if err != nil {
continue
}
// add to online / offline lists
if targetClient := server.clients.Get(casefoldedTarget); targetClient == nil {
offline = append(offline, target)
} else {
online = append(online, targetClient.Nick())
}
}
if len(online) > 0 {
rb.Add(nil, server.name, RPL_MONONLINE, client.Nick(), strings.Join(online, ","))
}
if len(offline) > 0 {
rb.Add(nil, server.name, RPL_MONOFFLINE, client.Nick(), strings.Join(offline, ","))
}
return false
}
// MONITOR C
func monitorClearHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
server.monitorManager.RemoveAll(client)
return false
}
// MONITOR L
func monitorListHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
monitorList := server.monitorManager.List(client)
var nickList []string
for _, cfnick := range monitorList {
replynick := cfnick
// report the uncasefolded nick if it's available, i.e., the client is online
if mclient := server.clients.Get(cfnick); mclient != nil {
replynick = mclient.Nick()
}
nickList = append(nickList, replynick)
}
for _, line := range utils.ArgsToStrings(maxLastArgLength, nickList, ",") {
rb.Add(nil, server.name, RPL_MONLIST, client.Nick(), line)
}
rb.Add(nil, server.name, RPL_ENDOFMONLIST, "End of MONITOR list")
return false
}
// MONITOR S
func monitorStatusHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
var online []string
var offline []string
monitorList := server.monitorManager.List(client)
for _, name := range monitorList {
target := server.clients.Get(name)
if target == nil {
offline = append(offline, name)
} else {
online = append(online, target.Nick())
}
}
if len(online) > 0 {
for _, line := range utils.ArgsToStrings(maxLastArgLength, online, ",") {
rb.Add(nil, server.name, RPL_MONONLINE, client.Nick(), line)
}
}
if len(offline) > 0 {
for _, line := range utils.ArgsToStrings(maxLastArgLength, offline, ",") {
rb.Add(nil, server.name, RPL_MONOFFLINE, client.Nick(), line)
}
}
return false
}
// MOTD
func motdHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
server.MOTD(client, rb)
return false
}
// NAMES [<channel>{,<channel>} [target]]
func namesHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
var channels []string
if len(msg.Params) > 0 {
channels = strings.Split(msg.Params[0], ",")
}
// TODO: in a post-federation world, process `target` (server to forward request to)
if len(channels) == 0 {
for _, channel := range server.channels.Channels() {
channel.Names(client, rb)
}
return false
}
for _, chname := range channels {
channel := server.channels.Get(chname)
if channel != nil {
channel.Names(client, rb)
} else if chname != "" {
rb.Add(nil, server.name, RPL_ENDOFNAMES, client.Nick(), chname, client.t("End of NAMES list"))
}
}
return false
}
// NICK <nickname>
func nickHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if client.Registered() {
performNickChange(server, client, client, msg.Params[0], rb)
} else {
client.SetPreregNick(msg.Params[0])
}
return false
}
// NOTICE <target>{,<target>} <message>
func noticeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
clientOnlyTags := utils.GetClientOnlyTags(msg.Tags)
targets := strings.Split(msg.Params[0], ",")
message := msg.Params[1]
// split privmsg
splitMsg := server.splitMessage(message, !client.capabilities.Has(caps.MaxLine))
for i, targetString := range targets {
// max of four targets per privmsg
if i > maxTargets-1 {
break
}
prefixes, targetString := modes.SplitChannelMembershipPrefixes(targetString)
lowestPrefix := modes.GetLowestChannelModePrefix(prefixes)
target, cerr := CasefoldChannel(targetString)
if cerr == nil {
channel := server.channels.Get(target)
if channel == nil {
// errors silently ignored with NOTICE as per RFC
continue
}
if !channel.CanSpeak(client) {
// errors silently ignored with NOTICE as per RFC
continue
}
msgid := server.generateMessageID()
channel.SplitNotice(msgid, lowestPrefix, clientOnlyTags, client, splitMsg, rb)
} else {
target, err := CasefoldName(targetString)
if err != nil {
continue
}
// NOTICEs sent to services are ignored
if _, isService := OragonoServices[target]; isService {
continue
}
user := server.clients.Get(target)
if user == nil {
// errors silently ignored with NOTICE as per RFC
continue
}
if !user.capabilities.Has(caps.MessageTags) {
clientOnlyTags = nil
}
msgid := server.generateMessageID()
// restrict messages appropriately when +R is set
// intentionally make the sending user think the message went through fine
if !user.HasMode(modes.RegisteredOnly) || client.LoggedIntoAccount() {
user.SendSplitMsgFromClient(msgid, client, clientOnlyTags, "NOTICE", user.nick, splitMsg)
}
if client.capabilities.Has(caps.EchoMessage) {
rb.AddSplitMessageFromClient(msgid, client, clientOnlyTags, "NOTICE", user.nick, splitMsg)
}
}
}
return false
}
// NPC <target> <sourcenick> <message>
func npcHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
target := msg.Params[0]
fakeSource := msg.Params[1]
message := msg.Params[2]
_, err := CasefoldName(fakeSource)
if err != nil {
client.Send(nil, client.server.name, ERR_CANNOTSENDRP, target, client.t("Fake source must be a valid nickname"))
return false
}
sourceString := fmt.Sprintf(npcNickMask, fakeSource, client.nick)
sendRoleplayMessage(server, client, sourceString, target, false, message, rb)
return false
}
// NPCA <target> <sourcenick> <message>
func npcaHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
target := msg.Params[0]
fakeSource := msg.Params[1]
message := msg.Params[2]
sourceString := fmt.Sprintf(npcNickMask, fakeSource, client.nick)
_, err := CasefoldName(fakeSource)
if err != nil {
client.Send(nil, client.server.name, ERR_CANNOTSENDRP, target, client.t("Fake source must be a valid nickname"))
return false
}
sendRoleplayMessage(server, client, sourceString, target, true, message, rb)
return false
}
// OPER <name> <password>
func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if client.HasMode(modes.Operator) == true {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, "OPER", client.t("You're already opered-up!"))
return false
}
authorized := false
oper := server.GetOperator(msg.Params[0])
if oper != nil {
password := []byte(msg.Params[1])
authorized = (bcrypt.CompareHashAndPassword(oper.Pass, password) == nil)
}
if !authorized {
rb.Add(nil, server.name, ERR_PASSWDMISMATCH, client.nick, client.t("Password incorrect"))
return true
}
oldNickmask := client.NickMaskString()
client.SetOper(oper)
client.updateNickMask("")
if client.NickMaskString() != oldNickmask {
client.sendChghost(oldNickmask, oper.Vhost)
}
// set new modes: modes.Operator, plus anything specified in the config
modeChanges := make([]modes.ModeChange, len(oper.Modes)+1)
modeChanges[0] = modes.ModeChange{
Mode: modes.Operator,
Op: modes.Add,
}
copy(modeChanges[1:], oper.Modes)
applied := ApplyUserModeChanges(client, modeChanges, true)
rb.Add(nil, server.name, RPL_YOUREOPER, client.nick, client.t("You are now an IRC operator"))
rb.Add(nil, server.name, "MODE", client.nick, applied.String())
server.snomasks.Send(sno.LocalOpers, fmt.Sprintf(ircfmt.Unescape("Client opered up $c[grey][$r%s$c[grey], $r%s$c[grey]]"), client.nickMaskString, oper.Name))
// client may now be unthrottled by the fakelag system
client.resetFakelag()
return false
}
// PART <channel>{,<channel>} [<reason>]
func partHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
channels := strings.Split(msg.Params[0], ",")
var reason string //TODO(dan): if this isn't supplied here, make sure the param doesn't exist in the PART message sent to other users
if len(msg.Params) > 1 {
reason = msg.Params[1]
}
for _, chname := range channels {
err := server.channels.Part(client, chname, reason, rb)
if err == errNoSuchChannel {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, chname, client.t("No such channel"))
}
}
return false
}
// PASS <password>
func passHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if client.Registered() {
rb.Add(nil, server.name, ERR_ALREADYREGISTRED, client.nick, client.t("You may not reregister"))
return false
}
// if no password exists, skip checking
serverPassword := server.Password()
if serverPassword == nil {
client.SetAuthorized(true)
return false
}
// check the provided password
password := []byte(msg.Params[0])
if passwd.ComparePassword(serverPassword, password) != nil {
rb.Add(nil, server.name, ERR_PASSWDMISMATCH, client.nick, client.t("Password incorrect"))
rb.Add(nil, server.name, "ERROR", client.t("Password incorrect"))
return true
}
client.SetAuthorized(true)
return false
}
// PING [params...]
func pingHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
rb.Add(nil, server.name, "PONG", msg.Params...)
return false
}
// PONG [params...]
func pongHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// client gets touched when they send this command, so we don't need to do anything
return false
}
// PRIVMSG <target>{,<target>} <message>
func privmsgHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
clientOnlyTags := utils.GetClientOnlyTags(msg.Tags)
targets := strings.Split(msg.Params[0], ",")
message := msg.Params[1]
// split privmsg
splitMsg := server.splitMessage(message, !client.capabilities.Has(caps.MaxLine))
for i, targetString := range targets {
// max of four targets per privmsg
if i > maxTargets-1 {
break
}
prefixes, targetString := modes.SplitChannelMembershipPrefixes(targetString)
lowestPrefix := modes.GetLowestChannelModePrefix(prefixes)
// eh, no need to notify them
if len(targetString) < 1 {
continue
}
target, err := CasefoldChannel(targetString)
if err == nil {
channel := server.channels.Get(target)
if channel == nil {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, targetString, client.t("No such channel"))
continue
}
if !channel.CanSpeak(client) {
rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
continue
}
msgid := server.generateMessageID()
channel.SplitPrivMsg(msgid, lowestPrefix, clientOnlyTags, client, splitMsg, rb)
} else {
target, err = CasefoldName(targetString)
if service, isService := OragonoServices[target]; isService {
servicePrivmsgHandler(service, server, client, message, rb)
continue
}
user := server.clients.Get(target)
if err != nil || user == nil {
if len(target) > 0 {
client.Send(nil, server.name, ERR_NOSUCHNICK, client.nick, target, "No such nick")
}
continue
}
if !user.capabilities.Has(caps.MessageTags) {
clientOnlyTags = nil
}
msgid := server.generateMessageID()
// restrict messages appropriately when +R is set
// intentionally make the sending user think the message went through fine
if !user.HasMode(modes.RegisteredOnly) || client.LoggedIntoAccount() {
user.SendSplitMsgFromClient(msgid, client, clientOnlyTags, "PRIVMSG", user.nick, splitMsg)
}
if client.capabilities.Has(caps.EchoMessage) {
rb.AddSplitMessageFromClient(msgid, client, clientOnlyTags, "PRIVMSG", user.nick, splitMsg)
}
if user.HasMode(modes.Away) {
//TODO(dan): possibly implement cooldown of away notifications to users
rb.Add(nil, server.name, RPL_AWAY, user.nick, user.awayMessage)
}
}
}
return false
}
// PROXY TCP4/6 SOURCEIP DESTIP SOURCEPORT DESTPORT
// http://www.haproxy.org/download/1.8/doc/proxy-protocol.txt
func proxyHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// only allow unregistered clients to use this command
if client.Registered() || client.proxiedIP != nil {
return false
}
for _, gateway := range server.ProxyAllowedFrom() {
if isGatewayAllowed(client.socket.conn.RemoteAddr(), gateway) {
proxiedIP := msg.Params[1]
// assume PROXY connections are always secure
return client.ApplyProxiedIP(proxiedIP, true)
}
}
client.Quit(client.t("PROXY command is not usable from your address"))
return true
}
// QUIT [<reason>]
func quitHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
reason := "Quit"
if len(msg.Params) > 0 {
reason += ": " + msg.Params[0]
}
client.Quit(reason)
return true
}
// REHASH
func rehashHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
server.logger.Info("rehash", fmt.Sprintf("REHASH command used by %s", client.nick))
err := server.rehash()
if err == nil {
rb.Add(nil, server.name, RPL_REHASHING, client.nick, "ircd.yaml", client.t("Rehashing"))
} else {
server.logger.Error("rehash", fmt.Sprintln("Failed to rehash:", err.Error()))
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, "REHASH", err.Error())
}
return false
}
// RENAME <oldchan> <newchan> [<reason>]
func renameHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) (result bool) {
result = false
errorResponse := func(err error, name string) {
// TODO: send correct error codes, e.g., ERR_CANNOTRENAME, ERR_CHANNAMEINUSE
var code string
switch err {
case errNoSuchChannel:
code = ERR_NOSUCHCHANNEL
case errRenamePrivsNeeded:
code = ERR_CHANOPRIVSNEEDED
case errInvalidChannelName:
code = ERR_UNKNOWNERROR
case errChannelNameInUse:
code = ERR_UNKNOWNERROR
default:
code = ERR_UNKNOWNERROR
}
rb.Add(nil, server.name, code, client.Nick(), "RENAME", name, err.Error())
}
oldName := strings.TrimSpace(msg.Params[0])
newName := strings.TrimSpace(msg.Params[1])
if oldName == "" || newName == "" {
errorResponse(errInvalidChannelName, "<empty>")
return
}
casefoldedOldName, err := CasefoldChannel(oldName)
if err != nil {
errorResponse(errInvalidChannelName, oldName)
return
}
reason := "No reason"
if 2 < len(msg.Params) {
reason = msg.Params[2]
}
channel := server.channels.Get(oldName)
if channel == nil {
errorResponse(errNoSuchChannel, oldName)
return
}
//TODO(dan): allow IRCops to do this?
if !channel.ClientIsAtLeast(client, modes.Operator) {
errorResponse(errRenamePrivsNeeded, oldName)
return
}
founder := channel.Founder()
if founder != "" && founder != client.Account() {
//TODO(dan): Change this to ERR_CANNOTRENAME
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, "RENAME", oldName, client.t("Only channel founders can change registered channels"))
return false
}
// perform the channel rename
err = server.channels.Rename(oldName, newName)
if err != nil {
errorResponse(err, newName)
return
}
// rename succeeded, persist it
go server.channelRegistry.Rename(channel, casefoldedOldName)
// send RENAME messages
for _, mcl := range channel.Members() {
if mcl.capabilities.Has(caps.Rename) {
mcl.Send(nil, client.nickMaskString, "RENAME", oldName, newName, reason)
} else {
mcl.Send(nil, mcl.nickMaskString, "PART", oldName, fmt.Sprintf(mcl.t("Channel renamed: %s"), reason))
if mcl.capabilities.Has(caps.ExtendedJoin) {
mcl.Send(nil, mcl.nickMaskString, "JOIN", newName, mcl.AccountName(), mcl.realname)
} else {
mcl.Send(nil, mcl.nickMaskString, "JOIN", newName)
}
}
}
return false
}
// RESUME <oldnick> [timestamp]
func resumeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
oldnick := msg.Params[0]
if strings.Contains(oldnick, " ") {
rb.Add(nil, server.name, ERR_CANNOT_RESUME, "*", client.t("Cannot resume connection, old nickname contains spaces"))
return false
}
if client.Registered() {
rb.Add(nil, server.name, ERR_CANNOT_RESUME, oldnick, client.t("Cannot resume connection, connection registration has already been completed"))
return false
}
var timestamp *time.Time
if 1 < len(msg.Params) {
ts, err := time.Parse("2006-01-02T15:04:05.999Z", msg.Params[1])
if err == nil {
timestamp = &ts
} else {
rb.Add(nil, server.name, ERR_CANNOT_RESUME, oldnick, client.t("Timestamp is not in 2006-01-02T15:04:05.999Z format, ignoring it"))
}
}
client.resumeDetails = &ResumeDetails{
OldNick: oldnick,
Timestamp: timestamp,
}
return false
}
// SANICK <oldnick> <nickname>
func sanickHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
targetNick := strings.TrimSpace(msg.Params[0])
target := server.clients.Get(targetNick)
if target == nil {
rb.Add(nil, server.name, ERR_NOSUCHNICK, client.nick, msg.Params[0], client.t("No such nick"))
return false
}
performNickChange(server, client, target, msg.Params[1], rb)
return false
}
// SCENE <target> <message>
func sceneHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
target := msg.Params[0]
message := msg.Params[1]
sourceString := fmt.Sprintf(sceneNickMask, client.nick)
sendRoleplayMessage(server, client, sourceString, target, false, message, rb)
return false
}
// TAGMSG <target>{,<target>}
func tagmsgHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
clientOnlyTags := utils.GetClientOnlyTags(msg.Tags)
// no client-only tags, so we can drop it
if clientOnlyTags == nil {
return false
}
targets := strings.Split(msg.Params[0], ",")
for i, targetString := range targets {
// max of four targets per privmsg
if i > maxTargets-1 {
break
}
prefixes, targetString := modes.SplitChannelMembershipPrefixes(targetString)
lowestPrefix := modes.GetLowestChannelModePrefix(prefixes)
// eh, no need to notify them
if len(targetString) < 1 {
continue
}
target, err := CasefoldChannel(targetString)
if err == nil {
channel := server.channels.Get(target)
if channel == nil {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, targetString, client.t("No such channel"))
continue
}
if !channel.CanSpeak(client) {
rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
continue
}
msgid := server.generateMessageID()
channel.TagMsg(msgid, lowestPrefix, clientOnlyTags, client, rb)
} else {
target, err = CasefoldName(targetString)
user := server.clients.Get(target)
if err != nil || user == nil {
if len(target) > 0 {
client.Send(nil, server.name, ERR_NOSUCHNICK, client.nick, target, client.t("No such nick"))
}
continue
}
msgid := server.generateMessageID()
// end user can't receive tagmsgs
if !user.capabilities.Has(caps.MessageTags) {
continue
}
user.SendFromClient(msgid, client, clientOnlyTags, "TAGMSG", user.nick)
if client.capabilities.Has(caps.EchoMessage) {
rb.AddFromClient(msgid, client, clientOnlyTags, "TAGMSG", user.nick)
}
if user.HasMode(modes.Away) {
//TODO(dan): possibly implement cooldown of away notifications to users
rb.Add(nil, server.name, RPL_AWAY, user.nick, user.awayMessage)
}
}
}
return false
}
// TIME
func timeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
rb.Add(nil, server.name, RPL_TIME, client.nick, server.name, time.Now().Format(time.RFC1123))
return false
}
// TOPIC <channel> [<topic>]
func topicHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
name, err := CasefoldChannel(msg.Params[0])
channel := server.channels.Get(name)
if err != nil || channel == nil {
if len(msg.Params[0]) > 0 {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.nick, msg.Params[0], client.t("No such channel"))
}
return false
}
if len(msg.Params) > 1 {
channel.SetTopic(client, msg.Params[1], rb)
} else {
channel.SendTopic(client, rb)
}
return false
}
// UNDLINE <ip>|<net>
func unDLineHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// check oper permissions
oper := client.Oper()
if oper == nil || !oper.Class.Capabilities["oper:local_unban"] {
rb.Add(nil, server.name, ERR_NOPRIVS, client.nick, msg.Command, client.t("Insufficient oper privs"))
return false
}
// get host
hostString := msg.Params[0]
// 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()
} else {
hostString = hostNet.String()
}
// save in datastore
err = server.store.Update(func(tx *buntdb.Tx) error {
dlineKey := fmt.Sprintf(keyDlineEntry, hostString)
// check if it exists or not
val, err := tx.Get(dlineKey)
if val == "" {
return errNoExistingBan
} else if err != nil {
return err
}
tx.Delete(dlineKey)
return nil
})
if err != nil {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, fmt.Sprintf(client.t("Could not remove ban [%s]"), err.Error()))
return false
}
if hostNet == nil {
server.dlines.RemoveIP(hostAddr)
} else {
server.dlines.RemoveNetwork(*hostNet)
}
rb.Notice(fmt.Sprintf(client.t("Removed D-Line for %s"), hostString))
server.snomasks.Send(sno.LocalXline, fmt.Sprintf(ircfmt.Unescape("%s$r removed D-Line for %s"), client.nick, hostString))
return false
}
// UNKLINE <mask>
func unKLineHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// check oper permissions
oper := client.Oper()
if oper == nil || !oper.Class.Capabilities["oper:local_unban"] {
rb.Add(nil, server.name, ERR_NOPRIVS, client.nick, msg.Command, client.t("Insufficient oper privs"))
return false
}
// get host
mask := msg.Params[0]
if !strings.Contains(mask, "!") && !strings.Contains(mask, "@") {
mask = mask + "!*@*"
} else if !strings.Contains(mask, "@") {
mask = mask + "@*"
}
// save in datastore
err := server.store.Update(func(tx *buntdb.Tx) error {
klineKey := fmt.Sprintf(keyKlineEntry, mask)
// check if it exists or not
val, err := tx.Get(klineKey)
if val == "" {
return errNoExistingBan
} else if err != nil {
return err
}
tx.Delete(klineKey)
return nil
})
if err != nil {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, fmt.Sprintf(client.t("Could not remove ban [%s]"), err.Error()))
return false
}
server.klines.RemoveMask(mask)
rb.Notice(fmt.Sprintf(client.t("Removed K-Line for %s"), mask))
server.snomasks.Send(sno.LocalXline, fmt.Sprintf(ircfmt.Unescape("%s$r removed K-Line for %s"), client.nick, mask))
return false
}
// USER <username> * 0 <realname>
func userHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if client.Registered() {
rb.Add(nil, server.name, ERR_ALREADYREGISTRED, client.nick, client.t("You may not reregister"))
return false
}
if client.username != "" && client.realname != "" {
return false
}
// confirm that username is valid
//
_, err := CasefoldName(msg.Params[0])
if err != nil {
rb.Add(nil, "", "ERROR", client.t("Malformed username"))
return true
}
if !client.HasUsername() {
client.username = "~" + msg.Params[0]
// don't bother updating nickmask here, it's not valid anyway
}
if client.realname == "" {
client.realname = msg.Params[3]
}
return false
}
// USERHOST <nickname>{ <nickname>}
func userhostHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
returnedNicks := make(map[string]bool)
for i, nickname := range msg.Params {
if i >= 10 {
break
}
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
}
if returnedNicks[casefoldedNickname] {
continue
}
// to prevent returning multiple results for a single nick
returnedNicks[casefoldedNickname] = true
var isOper, isAway string
if target.HasMode(modes.Operator) {
isOper = "*"
}
if target.HasMode(modes.Away) {
isAway = "-"
} else {
isAway = "+"
}
rb.Add(nil, client.server.name, RPL_USERHOST, client.nick, fmt.Sprintf("%s%s=%s%s@%s", target.nick, isOper, isAway, target.username, target.hostname))
}
return false
}
// VERSION
func versionHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
rb.Add(nil, server.name, RPL_VERSION, client.nick, Ver, server.name)
client.RplISupport(rb)
return false
}
// WEBIRC <password> <gateway> <hostname> <ip> [:flag1 flag2=x flag3]
func webircHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// only allow unregistered clients to use this command
if client.Registered() || client.proxiedIP != nil {
return false
}
// process flags
var secure bool
if 4 < len(msg.Params) {
for _, x := range strings.Split(msg.Params[4], " ") {
// split into key=value
var key string
if strings.Contains(x, "=") {
y := strings.SplitN(x, "=", 2)
key, _ = y[0], y[1]
} else {
key = x
}
lkey := strings.ToLower(key)
if lkey == "tls" || lkey == "secure" {
// only accept "tls" flag if the gateway's connection to us is secure as well
if client.HasMode(modes.TLS) || utils.AddrIsLocal(client.socket.conn.RemoteAddr()) {
secure = true
}
}
}
}
for _, info := range server.WebIRCConfig() {
for _, gateway := range info.Hosts {
if isGatewayAllowed(client.socket.conn.RemoteAddr(), gateway) {
// confirm password and/or fingerprint
givenPassword := msg.Params[0]
if 0 < len(info.Password) && passwd.ComparePasswordString(info.Password, givenPassword) != nil {
continue
}
if 0 < len(info.Fingerprint) && client.certfp != info.Fingerprint {
continue
}
proxiedIP := msg.Params[3]
return client.ApplyProxiedIP(proxiedIP, secure)
}
}
}
client.Quit(client.t("WEBIRC command is not usable from your address or incorrect password given"))
return true
}
// WHO [<mask> [o]]
func whoHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if msg.Params[0] == "" {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, "WHO", client.t("First param must be a mask or channel"))
return false
}
var mask string
if len(msg.Params) > 0 {
casefoldedMask, err := Casefold(msg.Params[0])
if err != nil {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, "WHO", client.t("Mask isn't valid"))
return false
}
mask = casefoldedMask
}
friends := client.Friends()
//TODO(dan): is this used and would I put this param in the Modern doc?
// if not, can we remove it?
//var operatorOnly bool
//if len(msg.Params) > 1 && msg.Params[1] == "o" {
// operatorOnly = true
//}
if mask[0] == '#' {
// TODO implement wildcard matching
//TODO(dan): ^ only for opers
channel := server.channels.Get(mask)
if channel != nil {
whoChannel(client, channel, friends, rb)
}
} else {
for mclient := range server.clients.FindAll(mask) {
client.rplWhoReply(nil, mclient, rb)
}
}
rb.Add(nil, server.name, RPL_ENDOFWHO, client.nick, mask, client.t("End of WHO list"))
return false
}
// WHOIS [<target>] <mask>{,<mask>}
func whoisHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
var masksString string
//var target string
if len(msg.Params) > 1 {
//target = msg.Params[0]
masksString = msg.Params[1]
} else {
masksString = msg.Params[0]
}
if len(strings.TrimSpace(masksString)) < 1 {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, client.t("No masks given"))
return false
}
if client.HasMode(modes.Operator) {
masks := strings.Split(masksString, ",")
for _, mask := range masks {
casefoldedMask, err := Casefold(mask)
if err != nil {
rb.Add(nil, client.server.name, ERR_NOSUCHNICK, client.nick, mask, client.t("No such nick"))
continue
}
matches := server.clients.FindAll(casefoldedMask)
if len(matches) == 0 {
rb.Add(nil, client.server.name, ERR_NOSUCHNICK, client.nick, mask, client.t("No such nick"))
continue
}
for mclient := range matches {
client.getWhoisOf(mclient, rb)
}
}
} else {
// only get the first request
casefoldedMask, err := Casefold(strings.Split(masksString, ",")[0])
mclient := server.clients.Get(casefoldedMask)
if err != nil || mclient == nil {
rb.Add(nil, client.server.name, ERR_NOSUCHNICK, client.nick, masksString, client.t("No such nick"))
// fall through, ENDOFWHOIS is always sent
} else {
client.getWhoisOf(mclient, rb)
}
}
rb.Add(nil, server.name, RPL_ENDOFWHOIS, client.nick, masksString, client.t("End of /WHOIS list"))
return false
}
// WHOWAS <nickname> [<count> [<server>]]
func whowasHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
nicknames := strings.Split(msg.Params[0], ",")
// 0 means "all the entries", as does a negative number
var count uint64
if len(msg.Params) > 1 {
count, _ = strconv.ParseUint(msg.Params[1], 10, 64)
}
//var target string
//if len(msg.Params) > 2 {
// target = msg.Params[2]
//}
cnick := client.Nick()
for _, nickname := range nicknames {
results := server.whoWas.Find(nickname, int(count))
if len(results) == 0 {
if len(nickname) > 0 {
rb.Add(nil, server.name, ERR_WASNOSUCHNICK, cnick, nickname, client.t("There was no such nickname"))
}
} else {
for _, whoWas := range results {
rb.Add(nil, server.name, RPL_WHOWASUSER, cnick, whoWas.nickname, whoWas.username, whoWas.hostname, "*", whoWas.realname)
}
}
if len(nickname) > 0 {
rb.Add(nil, server.name, RPL_ENDOFWHOWAS, cnick, nickname, client.t("End of WHOWAS"))
}
}
return false
}