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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "configreader.h"
#include "users.h"
#include "modules.h"
#include "inspircd.h"
#include "xline.h"
#include "commands/cmd_nick.h"
extern "C" command_t* init_command(InspIRCd* Instance)
{
return new cmd_nick(Instance);
}
/** Handle nick changes from users.
* NOTE: If you are used to ircds based on ircd2.8, and are looking
* for the client introduction code in here, youre in the wrong place.
* You need to look in the spanningtree module for this!
*/
CmdResult cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
{
char oldnick[NICKMAX];
if (!*parameters[0] || !*user->nick)
{
/* We cant put blanks in the parameters, so for this (extremely rare) issue we just put '*' here. */
user->WriteServ("432 %s * :Erroneous Nickname", *user->nick ? user->nick : "*");
return CMD_FAILURE;
}
if (irc::string(user->nick) == irc::string(parameters[0]))
{
/* If its exactly the same, even case, dont do anything. */
if (!strcmp(user->nick,parameters[0]))
return CMD_SUCCESS;
/* Its a change of case. People insisted that they should be
* able to do silly things like this even though the RFC says
* the nick AAA is the same as the nick aaa.
*/
strlcpy(oldnick, user->nick, NICKMAX - 1);
int MOD_RESULT = 0;
FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
if (MOD_RESULT)
return CMD_FAILURE;
if (user->registered == REG_ALL)
user->WriteCommon("NICK %s",parameters[0]);
strlcpy(user->nick, parameters[0], NICKMAX - 1);
user->InvalidateCache();
FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
return CMD_SUCCESS;
}
else
{
QLine* mq = ServerInstance->XLines->matches_qline(parameters[0]);
if (mq)
{
ServerInstance->SNO->WriteToSnoMask('x', "Q-Lined nickname %s from %s!%s@%s: %s", parameters[0], user->nick, user->ident, user->host, mq->reason);
user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0], mq->reason);
return CMD_FAILURE;
}
/* Check for nickname overruled -
* This happens when one user has connected and sent only NICK, and is essentially
* "camping" upon a nickname. To give the new user connecting a fair chance of having
* the nickname too, we force a nickchange on the older user (Simply the one who was
* here first, no TS checks need to take place here)
*/
userrec* InUse = ServerInstance->FindNick(parameters[0]);
if (InUse && (InUse != user) && (ServerInstance->IsNick(parameters[0])))
{
if (InUse->registered != REG_ALL)
{
/* change the nick of the older user to nnn-overruled,
* where nnn is their file descriptor. We know this to be unique.
* NOTE: We must do this and not quit the user, even though we do
* not have UID support yet. This is because if we set this user
* as quitting and then introduce the new user before the old one
* has quit, then the user hash gets totally buggered.
* (Yes, that is a technical term). -- Brain
*/
std::string changeback = ConvToStr(InUse->GetFd()) + "-overruled";
InUse->WriteTo(InUse, "NICK %s", changeback.c_str());
InUse->WriteServ("433 %s %s :Nickname overruled.", InUse->nick, InUse->nick);
InUse->UpdateNickHash(changeback.c_str());
strlcpy(InUse->nick, changeback.c_str(), NICKMAX - 1);
InUse->InvalidateCache();
/* Take away their nickname-sent state forcing them to send a nick again */
InUse->registered &= ~REG_NICK;
}
else
{
user->WriteServ("433 %s %s :Nickname is already in use.", user->registered >= REG_NICK ? user->nick : "*", parameters[0]);
return CMD_FAILURE;
}
}
}
if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
{
user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
return CMD_FAILURE;
}
if (user->registered == REG_ALL)
{
int MOD_RESULT = 0;
FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
if (MOD_RESULT) {
// if a module returns true, the nick change is silently forbidden.
return CMD_FAILURE;
}
user->WriteCommon("NICK %s",parameters[0]);
}
strlcpy(oldnick, user->nick, NICKMAX - 1);
/* change the nick of the user in the users_hash */
user = user->UpdateNickHash(parameters[0]);
/* actually change the nick within the record */
if (!user) return CMD_FAILURE;
if (!*user->nick) return CMD_FAILURE;
strlcpy(user->nick, parameters[0], NICKMAX - 1);
user->InvalidateCache();
if (user->registered < REG_NICKUSER)
{
user->registered = (user->registered | REG_NICK);
if (ServerInstance->Config->NoUserDns)
{
user->dns_done = true;
ServerInstance->next_call = ServerInstance->Time();
}
else
{
user->StartDNSLookup();
if (user->dns_done)
{
/* Cached result or instant failure - fall right through if possible */
ServerInstance->next_call = ServerInstance->Time();
}
else
{
if (ServerInstance->next_call > ServerInstance->Time() + ServerInstance->Config->dns_timeout)
ServerInstance->next_call = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
}
}
}
if (user->registered == REG_NICKUSER)
{
/* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
int MOD_RESULT = 0;
FOREACH_RESULT(I_OnUserRegister,OnUserRegister(user));
if (MOD_RESULT > 0)
return CMD_FAILURE;
}
if (user->registered == REG_ALL)
{
FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
}
return CMD_SUCCESS;
}
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