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3f5d59838e
ergo/irc/handlers.go
Shivaram Lingamneni 364d31e10c implement the strict modern behavior
2019-05-29 14:51:09 -04:00

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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"
"fmt"
"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/history"
"github.com/oragono/oragono/irc/modes"
"github.com/oragono/oragono/irc/sno"
"github.com/oragono/oragono/irc/utils"
"golang.org/x/crypto/bcrypt"
)
// ACC [LS|REGISTER|VERIFY] ...
func accHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
subcommand := strings.ToLower(msg.Params[0])
if subcommand == "ls" {
config := server.Config().Accounts
rb.Add(nil, server.name, "ACC", "LS", "SUBCOMMANDS", "LS REGISTER VERIFY")
// this list is sorted by the config loader, yay
rb.Add(nil, server.name, "ACC", "LS", "CALLBACKS", strings.Join(config.Registration.EnabledCallbacks, " "))
rb.Add(nil, server.name, "ACC", "LS", "CREDTYPES", "passphrase certfp")
flags := []string{"nospaces"}
if config.NickReservation.Enabled {
flags = append(flags, "regnick")
}
sort.Strings(flags)
rb.Add(nil, server.name, "ACC", "LS", "FLAGS", strings.Join(flags, " "))
return false
}
// disallow account stuff before connection registration has completed, for now
if !client.Registered() {
client.Send(nil, server.name, ERR_NOTREGISTERED, "*", client.t("You need to register before you can use that command"))
return false
}
// make sure reg is enabled
if !server.AccountConfig().Registration.Enabled {
rb.Add(nil, server.name, "FAIL", "ACC", "REG_UNAVAILABLE", client.t("Account registration is disabled"))
return false
}
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 {
// "If a callback namespace is not ... provided, the IRC server MUST use mailto""
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 {
nick := client.Nick()
if len(msg.Params) < 4 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, nick, msg.Command, client.t("Not enough parameters"))
return false
}
account := msg.Params[1]
// check for account name of *
if account == "*" {
account = nick
} else {
if server.Config().Accounts.NickReservation.Enabled {
rb.Add(nil, server.name, "FAIL", "ACC", "REG_MUST_USE_REGNICK", account, client.t("Must register with current nickname instead of separate account name"))
return false
}
}
// clients can't reg new accounts if they're already logged in
if client.LoggedIntoAccount() {
rb.Add(nil, server.name, "FAIL", "ACC", "REG_UNSPECIFIED_ERROR", account, client.t("You're already logged into an account"))
return false
}
// sanitise account name
casefoldedAccount, err := CasefoldName(account)
if err != nil {
rb.Add(nil, server.name, "FAIL", "ACC", "REG_INVALID_ACCOUNT_NAME", account, client.t("Account name is not valid"))
return false
}
callbackSpec := msg.Params[2]
callbackNamespace, callbackValue := parseCallback(callbackSpec, server.AccountConfig())
if callbackNamespace == "" {
rb.Add(nil, server.name, "FAIL", "ACC", "REG_INVALID_CALLBACK", account, callbackSpec, client.t("Cannot send verification code there"))
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, "FAIL", "ACC", "REG_INVALID_CREDENTIAL", account, client.t("You must connect with a TLS client certificate to use certfp"))
return false
}
if !credentialValid {
rb.Add(nil, server.name, "FAIL", "ACC", "REG_INVALID_CRED_TYPE", account, credentialType, 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
}
throttled, remainingTime := client.loginThrottle.Touch()
if throttled {
rb.Add(nil, server.name, "FAIL", "ACC", "REG_UNSPECIFIED_ERROR", account, fmt.Sprintf(client.t("Please wait at least %v and try again"), remainingTime))
return false
}
err = server.accounts.Register(client, account, callbackNamespace, callbackValue, passphrase, certfp)
if err != nil {
msg, code := registrationErrorToMessageAndCode(err)
rb.Add(nil, server.name, "FAIL", "ACC", code, account, 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")
message := fmt.Sprintf(messageTemplate, fmt.Sprintf("%s:%s", callbackNamespace, callbackValue))
rb.Add(nil, server.name, RPL_REG_VERIFICATION_REQUIRED, nick, casefoldedAccount, message)
}
return false
}
func registrationErrorToMessageAndCode(err error) (message, code string) {
// default responses: let's be risk-averse about displaying internal errors
// to the clients, especially for something as sensitive as accounts
code = "REG_UNSPECIFIED_ERROR"
message = `Could not register`
switch err {
case errAccountBadPassphrase:
code = "REG_INVALID_CREDENTIAL"
message = err.Error()
case errAccountAlreadyRegistered, errAccountAlreadyVerified:
message = err.Error()
case errAccountCreation, errAccountMustHoldNick, errAccountBadPassphrase, errCertfpAlreadyExists, errFeatureDisabled:
message = err.Error()
}
return
}
// 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_REG_SUCCESS, client.nick, client.AccountName(), client.t("Account created"))
}
sendSuccessfulAccountAuth(client, rb, forNS, false)
}
// sendSuccessfulAccountAuth means that an account auth attempt completed successfully, and is used to dispatch messages.
func sendSuccessfulAccountAuth(client *Client, rb *ResponseBuffer, forNS, forSASL bool) {
details := client.Details()
if forNS {
rb.Notice(fmt.Sprintf(client.t("You're now logged in as %s"), details.accountName))
} else {
//TODO(dan): some servers send this numeric even for NickServ logins iirc? to confirm and maybe do too
rb.Add(nil, client.server.name, RPL_LOGGEDIN, details.nick, details.nickMask, details.accountName, fmt.Sprintf(client.t("You are now logged in as %s"), details.accountName))
if forSASL {
rb.Add(nil, client.server.name, RPL_SASLSUCCESS, details.nick, client.t("Authentication successful"))
}
}
// dispatch account-notify
for friend := range client.Friends(caps.AccountNotify) {
friend.Send(nil, details.nickMask, "ACCOUNT", details.accountName)
}
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]]"), details.nickMask, details.accountName))
client.server.logger.Info("accounts", "client", details.nick, "logged into account", details.accountName)
}
// ACC VERIFY <accountname> <auth_code>
func accVerifyHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
account := strings.TrimSpace(msg.Params[1])
if len(msg.Params) < 3 {
rb.Add(nil, server.name, ERR_NEEDMOREPARAMS, client.Nick(), msg.Command, client.t("Not enough parameters"))
return false
}
err := server.accounts.Verify(client, account, msg.Params[2])
var code string
var message string
if err == errAccountVerificationInvalidCode {
code = "ACCOUNT_INVALID_VERIFY_CODE"
message = err.Error()
} else if err == errAccountAlreadyVerified {
code = "ACCOUNT_ALREADY_VERIFIED"
message = err.Error()
} else if err != nil {
code = "VERIFY_UNSPECIFIED_ERROR"
message = errAccountVerificationFailed.Error()
}
if err == nil {
rb.Add(nil, server.name, RPL_VERIFY_SUCCESS, client.Nick(), account, client.t("Account verification successful"))
sendSuccessfulAccountAuth(client, rb, false, false)
} else {
rb.Add(nil, server.name, "FAIL", "ACC", code, account, client.t(message))
}
return false
}
// AUTHENTICATE [<mechanism>|<data>|*]
func authenticateHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
config := server.Config()
details := client.Details()
if details.account != "" {
rb.Add(nil, server.name, ERR_SASLALREADY, details.nick, client.t("You're already logged into an account"))
return false
}
// sasl abort
if !server.AccountConfig().AuthenticationEnabled || len(msg.Params) == 1 && msg.Params[0] == "*" {
rb.Add(nil, server.name, ERR_SASLABORTED, details.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
if !config.Server.Compatibility.SendUnprefixedSasl {
// normal behavior
rb.Add(nil, server.name, "AUTHENTICATE", "+")
} else {
// gross hack: send a raw message to ensure no tags or prefix
rb.Flush(true)
rb.session.SendRawMessage(ircmsg.MakeMessage(nil, "", "AUTHENTICATE", "+"), true)
}
} else {
rb.Add(nil, server.name, ERR_SASLFAIL, details.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, details.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, details.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, details.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, details.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)
// 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
nick := client.Nick()
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, nick, client.t("SASL authentication failed: authcid and authzid should be the same"))
return false
}
} else {
rb.Add(nil, server.name, ERR_SASLFAIL, nick, client.t("SASL authentication failed: Invalid auth blob"))
return false
}
throttled, remainingTime := client.loginThrottle.Touch()
if throttled {
rb.Add(nil, server.name, ERR_SASLFAIL, nick, fmt.Sprintf(client.t("Please wait at least %v and try again"), remainingTime))
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, nick, fmt.Sprintf("%s: %s", client.t("SASL authentication failed"), client.t(msg)))
return false
}
sendSuccessfulAccountAuth(client, rb, false, true)
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", "sasl authentication failure", err.Error())
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
}
sendSuccessfulAccountAuth(client, rb, false, true)
return false
}
// AWAY [<message>]
func awayHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
var isAway bool
var awayMessage string
if len(msg.Params) > 0 {
isAway = true
awayMessage = msg.Params[0]
awayLen := server.Config().Limits.AwayLen
if len(awayMessage) > awayLen {
awayMessage = awayMessage[:awayLen]
}
}
client.SetAway(isAway, awayMessage)
if isAway {
rb.Add(nil, server.name, RPL_NOWAWAY, client.nick, client.t("You have been marked as being away"))
} else {
rb.Add(nil, server.name, RPL_UNAWAY, client.nick, client.t("You are no longer marked as being away"))
}
// dispatch away-notify
details := client.Details()
for session := range client.Friends(caps.AwayNotify) {
if isAway {
session.sendFromClientInternal(false, time.Time{}, "", details.nickMask, details.account, nil, "AWAY", awayMessage)
} else {
session.sendFromClientInternal(false, time.Time{}, "", details.nickMask, details.account, nil, "AWAY")
}
}
return false
}
// BRB [message]
func brbHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
success, duration := client.brbTimer.Enable()
if !success {
rb.Add(nil, server.name, "FAIL", "BRB", "CANNOT_BRB", client.t("Your client does not support BRB"))
return false
} else {
rb.Add(nil, server.name, "BRB", strconv.Itoa(int(duration.Seconds())))
}
var message string
if 0 < len(msg.Params) {
message = msg.Params[0]
} else {
message = client.t("I'll be right back")
}
if len(client.Sessions()) == 1 {
// true BRB
client.SetAway(true, message)
}
return true
}
// CAP <subcmd> [<caps>]
func capHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
details := client.Details()
subCommand := strings.ToUpper(msg.Params[0])
toAdd := caps.NewSet()
toRemove := caps.NewSet()
var capString string
badCaps := false
if len(msg.Params) > 1 {
capString = msg.Params[1]
strs := strings.Fields(capString)
for _, str := range strs {
remove := false
if str[0] == '-' {
str = str[1:]
remove = true
}
capab, err := caps.NameToCapability(str)
if err != nil || (!remove && !SupportedCapabilities.Has(capab)) {
badCaps = true
} else if !remove {
toAdd.Enable(capab)
} else {
toRemove.Enable(capab)
}
}
}
switch subCommand {
case "LS":
if !client.registered {
rb.session.capState = caps.NegotiatingState
}
if 1 < len(msg.Params) {
num, err := strconv.Atoi(msg.Params[1])
newVersion := caps.Version(num)
if err == nil && rb.session.capVersion < newVersion {
rb.session.capVersion = newVersion
}
}
// 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", details.nick, subCommand, SupportedCapabilities.String(rb.session.capVersion, CapValues))
case "LIST":
rb.Add(nil, server.name, "CAP", details.nick, subCommand, rb.session.capabilities.String(caps.Cap301, CapValues)) // values not sent on LIST so force 3.1
case "REQ":
if !client.registered {
rb.session.capState = caps.NegotiatingState
}
// make sure all capabilities actually exist
// #511, #521: oragono.io/nope is a fake cap to trap bad clients who blindly request
// every offered capability. during registration, requesting it produces a quit,
// otherwise just a CAP NAK
if badCaps || (toAdd.Has(caps.Nope) && client.registered) {
rb.Add(nil, server.name, "CAP", details.nick, "NAK", capString)
return false
} else if toAdd.Has(caps.Nope) && !client.registered {
client.Quit(fmt.Sprintf(client.t("Requesting the %s client capability is forbidden"), caps.Nope.Name()), rb.session)
return true
}
rb.session.capabilities.Union(toAdd)
rb.session.capabilities.Subtract(toRemove)
rb.Add(nil, server.name, "CAP", details.nick, "ACK", capString)
// if this is the first time the client is requesting a resume token,
// send it to them
if toAdd.Has(caps.Resume) {
token, id := server.resumeManager.GenerateToken(client)
if token != "" {
rb.Add(nil, server.name, "RESUME", "TOKEN", token)
rb.session.SetResumeID(id)
}
}
// update maxlenrest, just in case they altered the maxline cap
rb.session.SetMaxlenRest()
case "END":
if !client.registered {
rb.session.capState = caps.NegotiatedState
}
default:
rb.Add(nil, server.name, ERR_INVALIDCAPCMD, details.nick, subCommand, client.t("Invalid CAP subcommand"))
}
return false
}
// CHATHISTORY <target> <preposition> <query> [<limit>]
// e.g., CHATHISTORY #ircv3 AFTER id=ytNBbt565yt4r3err3 10
// CHATHISTORY <target> BETWEEN <query> <query> <direction> [<limit>]
// e.g., CHATHISTORY #ircv3 BETWEEN timestamp=YYYY-MM-DDThh:mm:ss.sssZ timestamp=YYYY-MM-DDThh:mm:ss.sssZ + 100
func chathistoryHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) (exiting bool) {
config := server.Config()
var items []history.Item
success := false
var hist *history.Buffer
var channel *Channel
defer func() {
// successful responses are sent as a chathistory or history batch
if success && 0 < len(items) {
batchType := "chathistory"
if rb.session.capabilities.Has(caps.EventPlayback) {
batchType = "history"
}
rb.ForceBatchStart(batchType, true)
if channel == nil {
client.replayPrivmsgHistory(rb, items, true)
} else {
channel.replayHistoryItems(rb, items, false)
}
return
}
// errors are sent either without a batch, or in a draft/labeled-response batch as usual
// TODO: send `WARN CHATHISTORY MAX_MESSAGES_EXCEEDED` when appropriate
if hist == nil {
rb.Add(nil, server.name, "ERR", "CHATHISTORY", "NO_SUCH_CHANNEL")
} else if len(items) == 0 {
rb.Add(nil, server.name, "ERR", "CHATHISTORY", "NO_TEXT_TO_SEND")
} else if !success {
rb.Add(nil, server.name, "ERR", "CHATHISTORY", "NEED_MORE_PARAMS")
}
}()
target := msg.Params[0]
channel = server.channels.Get(target)
if channel != nil && channel.hasClient(client) {
// "If [...] the user does not have permission to view the requested content, [...]
// NO_SUCH_CHANNEL SHOULD be returned"
hist = &channel.history
} else {
targetClient := server.clients.Get(target)
if targetClient != nil {
myAccount := client.Account()
targetAccount := targetClient.Account()
if myAccount != "" && targetAccount != "" && myAccount == targetAccount {
hist = &targetClient.history
}
}
}
if hist == nil {
return
}
preposition := strings.ToLower(msg.Params[1])
parseQueryParam := func(param string) (msgid string, timestamp time.Time, err error) {
err = errInvalidParams
pieces := strings.SplitN(param, "=", 2)
if len(pieces) < 2 {
return
}
identifier, value := strings.ToLower(pieces[0]), pieces[1]
if identifier == "id" {
msgid, err = value, nil
return
} else if identifier == "timestamp" {
timestamp, err = time.Parse(IRCv3TimestampFormat, value)
return
}
return
}
maxChathistoryLimit := config.History.ChathistoryMax
if maxChathistoryLimit == 0 {
return
}
parseHistoryLimit := func(paramIndex int) (limit int) {
if len(msg.Params) < (paramIndex + 1) {
return maxChathistoryLimit
}
limit, err := strconv.Atoi(msg.Params[paramIndex])
if err != nil || limit == 0 || limit > maxChathistoryLimit {
limit = maxChathistoryLimit
}
return
}
// TODO: as currently implemented, almost all of thes queries are worst-case O(n)
// in the number of stored history entries. Every one of them can be made O(1)
// if necessary, without too much difficulty. Some ideas:
// * Ensure that the ring buffer is sorted by time, enabling binary search for times
// * Maintain a map from msgid to position in the ring buffer
if preposition == "between" {
if len(msg.Params) >= 5 {
startMsgid, startTimestamp, startErr := parseQueryParam(msg.Params[2])
endMsgid, endTimestamp, endErr := parseQueryParam(msg.Params[3])
ascending := msg.Params[4] == "+"
limit := parseHistoryLimit(5)
if startErr != nil || endErr != nil {
success = false
} else if startMsgid != "" && endMsgid != "" {
inInterval := false
matches := func(item history.Item) (result bool) {
result = inInterval
if item.HasMsgid(startMsgid) {
if ascending {
inInterval = true
} else {
inInterval = false
return false // interval is exclusive
}
} else if item.HasMsgid(endMsgid) {
if ascending {
inInterval = false
return false
} else {
inInterval = true
}
}
return
}
items = hist.Match(matches, ascending, limit)
success = true
} else if !startTimestamp.IsZero() && !endTimestamp.IsZero() {
items, _ = hist.Between(startTimestamp, endTimestamp, ascending, limit)
if !ascending {
history.Reverse(items)
}
success = true
}
// else: mismatched params, success = false, fail
}
return
}
// before, after, latest, around
queryParam := msg.Params[2]
msgid, timestamp, err := parseQueryParam(queryParam)
limit := parseHistoryLimit(3)
before := false
switch preposition {
case "before":
before = true
fallthrough
case "after":
var matches history.Predicate
if err != nil {
break
} else if msgid != "" {
inInterval := false
matches = func(item history.Item) (result bool) {
result = inInterval
if item.HasMsgid(msgid) {
inInterval = true
}
return
}
} else {
matches = func(item history.Item) bool {
return before == item.Message.Time.Before(timestamp)
}
}
items = hist.Match(matches, !before, limit)
success = true
case "latest":
if queryParam == "*" {
items = hist.Latest(limit)
} else if err != nil {
break
} else {
var matches history.Predicate
if msgid != "" {
shouldStop := false
matches = func(item history.Item) bool {
if shouldStop {
return false
}
shouldStop = item.HasMsgid(msgid)
return !shouldStop
}
} else {
matches = func(item history.Item) bool {
return item.Message.Time.After(timestamp)
}
}
items = hist.Match(matches, false, limit)
}
success = true
case "around":
if err != nil {
break
}
var initialMatcher history.Predicate
if msgid != "" {
inInterval := false
initialMatcher = func(item history.Item) (result bool) {
if inInterval {
return true
} else {
inInterval = item.HasMsgid(msgid)
return inInterval
}
}
} else {
initialMatcher = func(item history.Item) (result bool) {
return item.Message.Time.Before(timestamp)
}
}
var halfLimit int
halfLimit = (limit + 1) / 2
firstPass := hist.Match(initialMatcher, false, halfLimit)
if len(firstPass) > 0 {
timeWindowStart := firstPass[0].Message.Time
items = hist.Match(func(item history.Item) bool {
return item.Message.Time.Equal(timeWindowStart) || item.Message.Time.After(timeWindowStart)
}, true, limit)
}
success = true
}
return
}
// 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
}
// helper for parsing the reason args to DLINE and KLINE
func getReasonsFromParams(params []string, currentArg int) (reason, operReason string) {
reason = "No reason given"
operReason = ""
if len(params) > currentArg {
reasons := strings.SplitN(strings.Join(params[currentArg:], " "), "|", 2)
if len(reasons) == 1 {
reason = strings.TrimSpace(reasons[0])
} else if len(reasons) == 2 {
reason = strings.TrimSpace(reasons[0])
operReason = strings.TrimSpace(reasons[1])
}
}
return
}
func formatBanForListing(client *Client, key string, info IPBanInfo) string {
desc := info.Reason
if info.OperReason != "" && info.OperReason != info.Reason {
desc = fmt.Sprintf("%s | %s", info.Reason, info.OperReason)
}
if info.Duration != 0 {
desc = fmt.Sprintf("%s [%s]", desc, info.TimeLeft())
}
return fmt.Sprintf(client.t("Ban - %[1]s - added by %[2]s - %[3]s"), key, info.OperName, desc)
}
// 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 {
client.Notice(formatBanForListing(client, key, info))
}
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])
if err != nil {
duration = 0
} else {
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
hostNet, err := utils.NormalizedNetFromString(hostString)
if err != 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 !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, operReason := getReasonsFromParams(msg.Params, currentArg)
operName := oper.Name
if operName == "" {
operName = server.name
}
err = server.dlines.AddNetwork(hostNet, duration, reason, operReason, operName)
if err != nil {
rb.Notice(fmt.Sprintf(client.t("Could not successfully save new D-LINE: %s"), err.Error()))
return false
}
var snoDescription string
hostString = utils.NetToNormalizedString(hostNet)
if duration != 0 {
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
for _, mcl := range server.clients.AllClients() {
if hostNet.Contains(mcl.IP()) {
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), nil)
if mcl == client {
killClient = true
} else {
// if mcl == client, we kill them below
mcl.destroy(nil)
}
}
// 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" {
client.sendHelp("HELP", server.helpIndexManager.GetIndex(client.Languages(), client.HasMode(modes.Operator)), 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
}
// HISTORY <target> [<limit>]
// e.g., HISTORY #ubuntu 10
// HISTORY me 15
func historyHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
config := server.Config()
if !config.History.Enabled {
rb.Notice(client.t("This command has been disabled by the server administrators"))
return false
}
target := msg.Params[0]
var hist *history.Buffer
channel := server.channels.Get(target)
if channel != nil && channel.hasClient(client) {
hist = &channel.history
} else {
if strings.ToLower(target) == "me" {
hist = &client.history
} else {
targetClient := server.clients.Get(target)
if targetClient != nil {
myAccount, targetAccount := client.Account(), targetClient.Account()
if myAccount != "" && targetAccount != "" && myAccount == targetAccount {
hist = &targetClient.history
}
}
}
}
if hist == nil {
if channel == nil {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.Nick(), target, client.t("No such channel"))
} else {
rb.Add(nil, server.name, ERR_NOTONCHANNEL, client.Nick(), target, client.t("You're not on that channel"))
}
return false
}
limit := 10
maxChathistoryLimit := config.History.ChathistoryMax
if len(msg.Params) > 1 {
providedLimit, err := strconv.Atoi(msg.Params[1])
if providedLimit > maxChathistoryLimit {
providedLimit = maxChathistoryLimit
}
if err == nil && providedLimit != 0 {
limit = providedLimit
}
}
items := hist.Latest(limit)
if channel != nil {
channel.replayHistoryItems(rb, items, false)
} else {
client.replayPrivmsgHistory(rb, items, true)
}
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, " "+strings.Replace(line, "\n", ", ", -1))
}
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
ison := make([]string, 0, len(msg.Params))
for _, nick := range nicks {
currentNick := server.getCurrentNick(nick)
if currentNick != "" {
ison = append(ison, currentNick)
}
}
rb.Add(nil, server.name, RPL_ISON, client.nick, strings.Join(ison, " "))
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], ",")
}
config := server.Config()
oper := client.Oper()
for i, name := range channels {
if config.Channels.MaxChannelsPerClient <= client.NumChannels() && oper == nil {
rb.Add(nil, server.name, ERR_TOOMANYCHANNELS, client.Nick(), name, client.t("You have joined too many channels"))
return false
}
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]
}
}
channels := strings.Split(channelString, ",")
for _, chname := range channels {
server.channels.Join(target, chname, "", true, rb)
}
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, nil)
target.destroy(nil)
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(formatBanForListing(client, key, info))
}
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])
if err != nil {
duration = 0
} else {
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, operReason := getReasonsFromParams(msg.Params, currentArg)
err = server.klines.AddMask(mask, duration, reason, operReason, operName)
if err != nil {
rb.Notice(fmt.Sprintf(client.t("Could not successfully save new K-LINE: %s"), err.Error()))
return false
}
var snoDescription string
if duration != 0 {
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), nil)
if mcl == client {
killClient = true
} else {
// if mcl == client, we kill them below
mcl.destroy(nil)
}
}
// 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 {
nick := client.Nick()
alreadyDoneLanguages := make(map[string]bool)
var appliedLanguages []string
lm := server.Languages()
supportedLanguagesCount := lm.Count()
if supportedLanguagesCount < len(msg.Params) {
rb.Add(nil, client.server.name, ERR_TOOMANYLANGUAGES, 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 := lm.Languages[value]
if !exists {
rb.Add(nil, client.server.name, ERR_NOLANGUAGE, nick, fmt.Sprintf(client.t("Language %s is not supported by this server"), value))
return false
}
// if we've already applied the given language, skip it
_, exists = alreadyDoneLanguages[value]
if exists {
continue
}
appliedLanguages = append(appliedLanguages, value)
}
var langsToSet []string
if !(len(appliedLanguages) == 1 && appliedLanguages[0] == "en") {
langsToSet = appliedLanguages
}
client.SetLanguages(langsToSet)
params := make([]string, len(appliedLanguages)+2)
params[0] = nick
copy(params[1:], appliedLanguages)
params[len(params)-1] = 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 includeFlags != 0 {
channel.MarkDirty(includeFlags)
}
// send out changes
prefix := client.NickMaskString()
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, prefix, "MODE", args...)
for _, session := range client.Sessions() {
if session != rb.session {
session.Send(nil, prefix, "MODE", args...)
}
}
} else {
member.Send(nil, prefix, "MODE", args...)
}
}
} else {
args := append([]string{client.nick, channel.name}, channel.modeStrings(client)...)
rb.Add(nil, prefix, 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
}
// get the correct capitalization of a nick (if it's online), otherwise return ""
func (server *Server) getCurrentNick(nick string) (result string) {
if service, isService := OragonoServices[strings.ToLower(nick)]; isService {
return service.Name
} else if iclient := server.clients.Get(nick); iclient != nil {
return iclient.Nick()
}
return ""
}
// 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.Config().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
}
currentNick := server.getCurrentNick(target)
// add to online / offline lists
if currentNick != "" {
online = append(online, currentNick)
} else {
offline = append(offline, target)
}
}
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 {
nick := client.Nick()
monitorList := server.monitorManager.List(client)
var nickList []string
for _, cfnick := range monitorList {
replynick := cfnick
currentNick := server.getCurrentNick(cfnick)
// report the uncasefolded nick if it's available, i.e., the client is online
if currentNick != "" {
replynick = currentNick
}
nickList = append(nickList, replynick)
}
for _, line := range utils.ArgsToStrings(maxLastArgLength, nickList, ",") {
rb.Add(nil, server.name, RPL_MONLIST, nick, line)
}
rb.Add(nil, server.name, RPL_ENDOFMONLIST, nick, "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 {
currentNick := server.getCurrentNick(name)
if currentNick != "" {
online = append(online, currentNick)
} else {
offline = append(offline, name)
}
}
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)
// implement the modern behavior: https://modern.ircdocs.horse/#names-message
// "Servers MAY only return information about the first <channel> and silently ignore the others."
// "If no parameter is given for this command, servers SHOULD return one RPL_ENDOFNAMES numeric
// with the <channel> parameter set to an asterix character"
if len(channels) == 0 {
rb.Add(nil, server.name, RPL_ENDOFNAMES, client.Nick(), "*", client.t("End of NAMES list"))
return false
}
chname := channels[0]
success := false
channel := server.channels.Get(chname)
if channel != nil {
if !channel.flags.HasMode(modes.Secret) || channel.hasClient(client) || client.HasMode(modes.Operator) {
channel.Names(client, rb)
success = true
}
}
if !success { // channel.Names() sends this numeric itself on success
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, nil, msg.Params[0], rb)
} else {
client.preregNick = msg.Params[0]
}
return false
}
// NOTICE <target>{,<target>} <message>
// PRIVMSG <target>{,<target>} <message>
// TAGMSG <target>{,<target>}
func messageHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
histType, err := msgCommandToHistType(server, msg.Command)
if err != nil {
return false
}
cnick := client.Nick()
clientOnlyTags := msg.ClientOnlyTags()
if histType == history.Tagmsg && len(clientOnlyTags) == 0 {
// nothing to do
return false
}
targets := strings.Split(msg.Params[0], ",")
var message string
if len(msg.Params) > 1 {
message = msg.Params[1]
}
// note that error replies are never sent for NOTICE
if client.isTor && isRestrictedCTCPMessage(message) {
if histType != history.Notice {
rb.Add(nil, server.name, "NOTICE", client.t("CTCP messages are disabled over Tor"))
}
return false
}
for i, targetString := range targets {
// each target gets distinct msgids
splitMsg := utils.MakeSplitMessage(message, !rb.session.capabilities.Has(caps.MaxLine))
// max of four targets per privmsg
if i > maxTargets-1 {
break
}
prefixes, targetString := modes.SplitChannelMembershipPrefixes(targetString)
lowestPrefix := modes.GetLowestChannelModePrefix(prefixes)
if len(targetString) == 0 {
continue
} else if targetString[0] == '#' {
channel := server.channels.Get(targetString)
if channel == nil {
if histType != history.Notice {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, cnick, targetString, client.t("No such channel"))
}
continue
}
channel.SendSplitMessage(msg.Command, lowestPrefix, clientOnlyTags, client, splitMsg, rb)
} else {
// NOTICE and TAGMSG to services are ignored
if histType == history.Privmsg {
lowercaseTarget := strings.ToLower(targetString)
if service, isService := OragonoServices[lowercaseTarget]; isService {
servicePrivmsgHandler(service, server, client, message, rb)
continue
} else if _, isZNC := zncHandlers[lowercaseTarget]; isZNC {
zncPrivmsgHandler(client, lowercaseTarget, message, rb)
continue
}
}
user := server.clients.Get(targetString)
if user == nil {
if histType != history.Notice {
rb.Add(nil, server.name, ERR_NOSUCHNICK, cnick, targetString, "No such nick")
}
continue
}
tnick := user.Nick()
nickMaskString := client.NickMaskString()
accountName := client.AccountName()
// restrict messages appropriately when +R is set
// intentionally make the sending user think the message went through fine
allowedPlusR := !user.HasMode(modes.RegisteredOnly) || client.LoggedIntoAccount()
allowedTor := !user.isTor || !isRestrictedCTCPMessage(message)
if allowedPlusR && allowedTor {
for _, session := range user.Sessions() {
if histType == history.Tagmsg {
// don't send TAGMSG at all if they don't have the tags cap
if session.capabilities.Has(caps.MessageTags) {
session.sendFromClientInternal(false, splitMsg.Time, splitMsg.Msgid, nickMaskString, accountName, clientOnlyTags, msg.Command, tnick)
}
} else {
session.sendSplitMsgFromClientInternal(false, nickMaskString, accountName, clientOnlyTags, msg.Command, tnick, splitMsg)
}
}
}
// an echo-message may need to be included in the response:
if rb.session.capabilities.Has(caps.EchoMessage) {
if histType == history.Tagmsg && rb.session.capabilities.Has(caps.MessageTags) {
rb.AddFromClient(splitMsg.Time, splitMsg.Msgid, nickMaskString, accountName, clientOnlyTags, msg.Command, tnick)
} else {
rb.AddSplitMessageFromClient(nickMaskString, accountName, clientOnlyTags, msg.Command, tnick, splitMsg)
}
}
// an echo-message may need to go out to other client sessions:
for _, session := range client.Sessions() {
if session == rb.session {
continue
}
if histType == history.Tagmsg && rb.session.capabilities.Has(caps.MessageTags) {
session.sendFromClientInternal(false, splitMsg.Time, splitMsg.Msgid, nickMaskString, accountName, clientOnlyTags, msg.Command, tnick)
} else if histType != history.Tagmsg {
session.sendSplitMsgFromClientInternal(false, nickMaskString, accountName, clientOnlyTags, msg.Command, tnick, splitMsg)
}
}
if histType != history.Notice && user.Away() {
//TODO(dan): possibly implement cooldown of away notifications to users
rb.Add(nil, server.name, RPL_AWAY, cnick, tnick, user.AwayMessage())
}
item := history.Item{
Type: histType,
Message: splitMsg,
Nick: nickMaskString,
AccountName: accountName,
}
// add to the target's history:
user.history.Add(item)
// add this to the client's history as well, recording the target:
item.Params[0] = tnick
client.history.Add(item)
}
}
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) {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.Nick(), "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"))
client.Quit(client.t("Password incorrect"), rb.session)
return true
}
oldNickmask := client.NickMaskString()
client.SetOper(oper)
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
for _, session := range client.Sessions() {
session.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.Config().Server.passwordBytes
if serverPassword == nil {
return false
}
// check the provided password
password := []byte(msg.Params[0])
client.sentPassCommand = bcrypt.CompareHashAndPassword(serverPassword, password) == nil
// if they failed the check, we'll bounce them later when they try to complete registration
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
}
func isRestrictedCTCPMessage(message string) bool {
// block all CTCP privmsgs to Tor clients except for ACTION
// DCC can potentially be used for deanonymization, the others for fingerprinting
return strings.HasPrefix(message, "\x01") && !strings.HasPrefix(message, "\x01ACTION")
}
// 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, rb.session)
return true
}
// REHASH
func rehashHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
server.logger.Info("server", 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("server", 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
oldName, newName := msg.Params[0], msg.Params[1]
if newName == "" {
newName = "<empty>" // intentionally invalid channel name, will error as expected
}
var reason string
if 2 < len(msg.Params) {
reason = msg.Params[2]
}
channel := server.channels.Get(oldName)
if channel == nil {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.Nick(), oldName, client.t("No such channel"))
return false
}
if !(channel.ClientIsAtLeast(client, modes.Operator) || client.HasRoleCapabs("chanreg")) {
rb.Add(nil, server.name, ERR_CHANOPRIVSNEEDED, client.Nick(), oldName, client.t("You're not a channel operator"))
return false
}
founder := channel.Founder()
if founder != "" && founder != client.Account() {
rb.Add(nil, server.name, ERR_CANNOTRENAME, client.Nick(), oldName, newName, client.t("Only channel founders can change registered channels"))
return false
}
// perform the channel rename
err := server.channels.Rename(oldName, newName)
if err == errInvalidChannelName {
rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, client.Nick(), newName, client.t(err.Error()))
} else if err == errChannelNameInUse {
rb.Add(nil, server.name, ERR_CHANNAMEINUSE, client.Nick(), newName, client.t(err.Error()))
} else if err != nil {
rb.Add(nil, server.name, ERR_CANNOTRENAME, client.Nick(), oldName, newName, client.t("Cannot rename channel"))
}
if err != nil {
return false
}
// send RENAME messages
clientPrefix := client.NickMaskString()
for _, mcl := range channel.Members() {
mDetails := mcl.Details()
for _, mSession := range mcl.Sessions() {
targetRb := rb
targetPrefix := clientPrefix
if mSession != rb.session {
targetRb = NewResponseBuffer(mSession)
targetPrefix = mDetails.nickMask
}
if mSession.capabilities.Has(caps.Rename) {
if reason != "" {
targetRb.Add(nil, clientPrefix, "RENAME", oldName, newName, reason)
} else {
targetRb.Add(nil, clientPrefix, "RENAME", oldName, newName)
}
} else {
if reason != "" {
targetRb.Add(nil, targetPrefix, "PART", oldName, fmt.Sprintf(mcl.t("Channel renamed: %s"), reason))
} else {
targetRb.Add(nil, targetPrefix, "PART", oldName, fmt.Sprintf(mcl.t("Channel renamed")))
}
if mSession.capabilities.Has(caps.ExtendedJoin) {
targetRb.Add(nil, targetPrefix, "JOIN", newName, mDetails.accountName, mDetails.realname)
} else {
targetRb.Add(nil, targetPrefix, "JOIN", newName)
}
channel.SendTopic(mcl, targetRb, false)
channel.Names(mcl, targetRb)
}
if mcl != client {
targetRb.Send(false)
}
}
}
return false
}
// RESUME <token> [timestamp]
func resumeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
details := ResumeDetails{
PresentedToken: msg.Params[0],
}
if client.registered {
rb.Add(nil, server.name, "FAIL", "RESUME", "REGISTRATION_IS_COMPLETED", client.t("Cannot resume connection, connection registration has already been completed"))
return false
}
if 1 < len(msg.Params) {
ts, err := time.Parse(IRCv3TimestampFormat, msg.Params[1])
if err == nil {
details.Timestamp = ts
} else {
rb.Add(nil, server.name, "WARN", "RESUME", "HISTORY_LOST", client.t("Timestamp is not in 2006-01-02T15:04:05.999Z format, ignoring it"))
}
}
rb.session.resumeDetails = &details
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, nil, 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
}
// SETNAME <realname>
func setnameHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
realname := msg.Params[0]
client.stateMutex.Lock()
client.realname = realname
client.stateMutex.Unlock()
details := client.Details()
// alert friends
now := time.Now().UTC()
for session := range client.Friends(caps.SetName) {
session.sendFromClientInternal(false, now, "", details.nickMask, details.account, nil, "SETNAME", details.realname)
}
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().UTC().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, true)
}
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
hostNet, err := utils.NormalizedNetFromString(hostString)
if err != nil {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, client.t("Could not parse IP address or CIDR network"))
return false
}
err = server.dlines.RemoveNetwork(hostNet)
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
}
hostString = utils.NetToNormalizedString(hostNet)
rb.Notice(fmt.Sprintf(client.t("Removed D-Line for %s"), hostString))
server.snomasks.Send(sno.LocalXline, fmt.Sprintf(ircfmt.Unescape("%s$r removed D-Line for %s"), client.nick, hostString))
return false
}
// UNKLINE <mask>
func unKLineHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
// check oper permissions
oper := client.Oper()
if oper == nil || !oper.Class.Capabilities["oper:local_unban"] {
rb.Add(nil, server.name, ERR_NOPRIVS, client.nick, msg.Command, client.t("Insufficient oper privs"))
return false
}
// get host
mask := msg.Params[0]
if !strings.Contains(mask, "!") && !strings.Contains(mask, "@") {
mask = mask + "!*@*"
} else if !strings.Contains(mask, "@") {
mask = mask + "@*"
}
err := server.klines.RemoveMask(mask)
if err != nil {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, msg.Command, fmt.Sprintf(client.t("Could not remove ban [%s]"), err.Error()))
return false
}
rb.Notice(fmt.Sprintf(client.t("Removed K-Line for %s"), mask))
server.snomasks.Send(sno.LocalXline, fmt.Sprintf(ircfmt.Unescape("%s$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
}
err := client.SetNames(msg.Params[0], msg.Params[3], false)
if err == errInvalidUsername {
// if client's using a unicode nick or something weird, let's just set 'em up with a stock username instead.
// fixes clients that just use their nick as a username so they can still use the interesting nick
if client.preregNick == msg.Params[0] {
client.SetNames("user", msg.Params[3], false)
} else {
rb.Add(nil, server.name, ERR_INVALIDUSERNAME, client.Nick(), client.t("Malformed username"))
}
}
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.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) || client.realIP.IsLoopback() {
secure = true
}
}
}
}
givenPassword := []byte(msg.Params[0])
for _, info := range server.Config().Server.WebIRC {
if utils.IPInNets(client.realIP, info.allowedNets) {
// confirm password and/or fingerprint
if 0 < len(info.Password) && bcrypt.CompareHashAndPassword(info.Password, givenPassword) != nil {
continue
}
if 0 < len(info.Fingerprint) && client.certfp != info.Fingerprint {
continue
}
proxiedIP := msg.Params[3]
// see #211; websocket gateways will wrap ipv6 addresses in square brackets
// because IRC parameters can't start with :
if strings.HasPrefix(proxiedIP, "[") && strings.HasSuffix(proxiedIP, "]") {
proxiedIP = proxiedIP[1 : len(proxiedIP)-1]
}
err, quitMsg := client.ApplyProxiedIP(rb.session, proxiedIP, secure)
if err != nil {
client.Quit(quitMsg, rb.session)
return true
} else {
return false
}
}
}
client.Quit(client.t("WEBIRC command is not usable from your address or incorrect password given"), rb.session)
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, client.Nick(), "WHO", client.t("Mask isn't valid"))
return false
}
mask = casefoldedMask
}
//TODO(dan): is this used and would I put this param in the Modern doc?
// if not, can we remove it?
//var operatorOnly bool
//if len(msg.Params) > 1 && msg.Params[1] == "o" {
// operatorOnly = true
//}
isOper := client.HasMode(modes.Operator)
if mask[0] == '#' {
// TODO implement wildcard matching
//TODO(dan): ^ only for opers
channel := server.channels.Get(mask)
if channel != nil {
isJoined := channel.hasClient(client)
if !channel.flags.HasMode(modes.Secret) || isJoined || isOper {
for _, member := range channel.Members() {
if !member.HasMode(modes.Invisible) || isJoined || isOper {
client.rplWhoReply(channel, member, 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
}
handleService := func(nick string) bool {
cfnick, _ := CasefoldName(nick)
service, ok := OragonoServices[cfnick]
if !ok {
return false
}
clientNick := client.Nick()
rb.Add(nil, client.server.name, RPL_WHOISUSER, clientNick, service.Name, service.Name, "localhost", "*", fmt.Sprintf(client.t("Network service, for more info /msg %s HELP"), service.Name))
// hehe
if client.HasMode(modes.TLS) {
rb.Add(nil, client.server.name, RPL_WHOISSECURE, clientNick, service.Name, client.t("is using a secure connection"))
}
return true
}
if client.HasMode(modes.Operator) {
for _, mask := range strings.Split(masksString, ",") {
matches := server.clients.FindAll(mask)
if len(matches) == 0 && !handleService(mask) {
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; also require a nick, not a mask
nick := strings.Split(masksString, ",")[0]
mclient := server.clients.Get(nick)
if mclient != nil {
client.getWhoisOf(mclient, rb)
} else if !handleService(nick) {
rb.Add(nil, client.server.name, ERR_NOSUCHNICK, client.nick, masksString, client.t("No such nick"))
}
// fall through, ENDOFWHOIS is always sent
}
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.nick, 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
}
// ZNC <module> [params]
func zncHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
zncModuleHandler(client, msg.Params[0], msg.Params[1:], rb)
return false
}
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