ircd/irc/nickname.go
2019-04-14 20:48:50 -04:00

101 lines
3.2 KiB
Go

// Copyright (c) 2012-2014 Jeremy Latt
// Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
// released under the MIT license
package irc
import (
"crypto/rand"
"encoding/hex"
"fmt"
"strings"
"github.com/goshuirc/irc-go/ircfmt"
"github.com/oragono/oragono/irc/sno"
)
var (
// anything added here MUST be casefolded:
restrictedNicknames = map[string]bool{
"=scene=": true, // used for rp commands
"histserv": true, // TODO(slingamn) this should become a real service
}
)
// returns whether the change succeeded or failed
func performNickChange(server *Server, client *Client, target *Client, session *Session, newnick string, rb *ResponseBuffer) bool {
nickname := strings.TrimSpace(newnick)
cfnick, err := CasefoldName(nickname)
currentNick := client.Nick()
if len(nickname) < 1 {
rb.Add(nil, server.name, ERR_NONICKNAMEGIVEN, currentNick, client.t("No nickname given"))
return false
}
if err != nil || len(nickname) > server.Limits().NickLen || restrictedNicknames[cfnick] {
rb.Add(nil, server.name, ERR_ERRONEUSNICKNAME, currentNick, nickname, client.t("Erroneous nickname"))
return false
}
if target.Nick() == nickname {
return true
}
hadNick := target.HasNick()
origNickMask := target.NickMaskString()
whowas := target.WhoWas()
err = client.server.clients.SetNick(target, session, nickname)
if err == errNicknameInUse {
rb.Add(nil, server.name, ERR_NICKNAMEINUSE, currentNick, nickname, client.t("Nickname is already in use"))
return false
} else if err == errNicknameReserved {
rb.Add(nil, server.name, ERR_NICKNAMEINUSE, currentNick, nickname, client.t("Nickname is reserved by a different account"))
return false
} else if err != nil {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, currentNick, "NICK", fmt.Sprintf(client.t("Could not set or change nickname: %s"), err.Error()))
return false
}
target.nickTimer.Touch()
client.server.logger.Debug("nick", fmt.Sprintf("%s changed nickname to %s [%s]", origNickMask, nickname, cfnick))
if hadNick {
target.server.snomasks.Send(sno.LocalNicks, fmt.Sprintf(ircfmt.Unescape("$%s$r changed nickname to %s"), whowas.nick, nickname))
target.server.whoWas.Append(whowas)
rb.Add(nil, origNickMask, "NICK", nickname)
for session := range target.Friends() {
if session != rb.session {
session.Send(nil, origNickMask, "NICK", nickname)
}
}
}
if target.Registered() {
client.server.monitorManager.AlertAbout(target, true)
}
// else: Run() will attempt registration immediately after this
return true
}
func (server *Server) RandomlyRename(client *Client) {
prefix := server.AccountConfig().NickReservation.RenamePrefix
if prefix == "" {
prefix = "Guest-"
}
buf := make([]byte, 8)
rand.Read(buf)
nick := fmt.Sprintf("%s%s", prefix, hex.EncodeToString(buf))
sessions := client.Sessions()
if len(sessions) == 0 {
return
}
// XXX arbitrarily pick the first session to receive error messages;
// all other sessions receive a `NICK` line same as a friend would
rb := NewResponseBuffer(sessions[0])
performNickChange(server, client, client, nil, nick, rb)
rb.Send(false)
// technically performNickChange can fail to change the nick,
// but if they're still delinquent, the timer will get them later
}