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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "xline.h"
/** Handle /NICK. These command handlers can be reloaded by the core,
* and handle basic RFC1459 commands. Commands within modules work
* the same way, however, they can be fully unloaded, where these
* may not.
*/
class CommandNick : public Command
{
public:
/** Constructor for nick.
*/
CommandNick (InspIRCd* Instance, Module* parent) : Command(Instance,parent,"NICK", 0, 1, true, 3) { syntax = "<newnick>"; }
/** Handle command.
* @param parameters The parameters to the comamnd
* @param pcnt The number of parameters passed to teh command
* @param user The user issuing the command
* @return A value from CmdResult to indicate command success or failure.
*/
CmdResult Handle(const std::vector<std::string>& parameters, User *user);
};
/** 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 CommandNick::Handle (const std::vector<std::string>& parameters, User *user)
{
std::string oldnick;
if (parameters[0].empty())
{
/* We cant put blanks in the parameters, so for this (extremely rare) issue we just put '*' here. */
user->WriteNumeric(432, "%s * :Erroneous Nickname", user->nick.empty() ? user->nick.c_str() : "*");
return CMD_FAILURE;
}
if (((!ServerInstance->IsNick(parameters[0].c_str(), ServerInstance->Config->Limits.NickMax))) && (IS_LOCAL(user)))
{
if (!User::NICKForced.get(user))
{
if (parameters[0] == "0")
{
// Special case, Fake a /nick UIDHERE. Useful for evading "ERR: NICK IN USE" on connect etc.
std::vector<std::string> p2;
p2.push_back(user->uuid);
User::NICKForced.set(user, 1);
this->Handle(p2, user);
User::NICKForced.set(user, 0);
return CMD_SUCCESS;
}
user->WriteNumeric(432, "%s %s :Erroneous Nickname", user->nick.c_str(),parameters[0].c_str());
return CMD_FAILURE;
}
}
if (assign(user->nick) == parameters[0])
{
/* If its exactly the same, even case, dont do anything. */
if (parameters[0] == user->nick)
{
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.
*/
oldnick.assign(user->nick, 0, IS_LOCAL(user) ? ServerInstance->Config->Limits.NickMax : MAXBUF);
ModResult MOD_RESULT;
FIRST_MOD_RESULT(ServerInstance, OnUserPreNick, MOD_RESULT, (user,parameters[0]));
if (MOD_RESULT == MOD_RES_DENY)
return CMD_FAILURE;
if (user->registered == REG_ALL)
user->WriteCommon("NICK %s",parameters[0].c_str());
user->nick.assign(parameters[0], 0, IS_LOCAL(user) ? ServerInstance->Config->Limits.NickMax : MAXBUF);
user->InvalidateCache();
FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
return CMD_SUCCESS;
}
else
{
/*
* Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
* tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
* Thanks Kein for finding this. -- w00t
*
* Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
* -- w00t
*/
if (!IS_LOCAL(user))
{
XLine* mq = ServerInstance->XLines->MatchesLine("Q",parameters[0]);
if (mq)
{
if (user->registered == REG_ALL)
{
ServerInstance->SNO->WriteToSnoMask('x', "Q-Lined nickname %s from %s!%s@%s: %s",
parameters[0].c_str(), user->nick.c_str(), user->ident.c_str(), user->host.c_str(), mq->reason.c_str());
}
user->WriteNumeric(432, "%s %s :Invalid nickname: %s",user->nick.c_str(), parameters[0].c_str(), mq->reason.c_str());
return CMD_FAILURE;
}
if (ServerInstance->Config->RestrictBannedUsers)
{
for (UCListIter i = user->chans.begin(); i != user->chans.end(); i++)
{
Channel *chan = *i;
if (chan->GetPrefixValue(user) < VOICE_VALUE && chan->IsBanned(user))
{
user->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", user->nick.c_str(), chan->name.c_str());
return CMD_FAILURE;
}
}
}
}
/*
* Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
* then we have a potential collide. Check whether someone else is camping on the nick
* (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
* camper to their UID, and allow the incoming nick change.
*
* If the guy using the nick is already using it, tell the incoming nick change to gtfo,
* because the nick is already (rightfully) in use. -- w00t
*/
User* InUse = ServerInstance->FindNickOnly(parameters[0]);
if (InUse && (InUse != user))
{
if (InUse->registered != REG_ALL)
{
/* force the camper to their UUID, and ask them to re-send a NICK. */
InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
InUse->UpdateNickHash(InUse->uuid.c_str());
InUse->nick.assign(InUse->uuid, 0, IS_LOCAL(InUse) ? ServerInstance->Config->Limits.NickMax : MAXBUF);
InUse->InvalidateCache();
InUse->registered &= ~REG_NICK;
}
else
{
/* No camping, tell the incoming user to stop trying to change nick ;p */
user->WriteNumeric(433, "%s %s :Nickname is already in use.", user->registered >= REG_NICK ? user->nick.c_str() : "*", parameters[0].c_str());
return CMD_FAILURE;
}
}
}
ModResult MOD_RESULT;
FIRST_MOD_RESULT(ServerInstance, OnUserPreNick, MOD_RESULT, (user, parameters[0]));
if (MOD_RESULT == MOD_RES_DENY)
// if a module returns true, the nick change is silently forbidden.
return CMD_FAILURE;
if (user->registered == REG_ALL)
user->WriteCommon("NICK %s", parameters[0].c_str());
oldnick.assign(user->nick, 0, IS_LOCAL(user) ? ServerInstance->Config->Limits.NickMax : MAXBUF);
/* change the nick of the user in the users_hash */
user = user->UpdateNickHash(parameters[0].c_str());
/* actually change the nick within the record */
if (!user)
return CMD_FAILURE;
user->nick.assign(parameters[0], 0, IS_LOCAL(user) ? ServerInstance->Config->Limits.NickMax : MAXBUF);
user->InvalidateCache();
if (user->registered < REG_NICKUSER)
{
user->registered = (user->registered | REG_NICK);
if (user->registered == REG_NICKUSER)
{
/* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
FIRST_MOD_RESULT(ServerInstance, OnUserRegister, MOD_RESULT, (user));
if (MOD_RESULT == MOD_RES_DENY)
return CMD_FAILURE;
// return early to not penalize new users
return CMD_SUCCESS;
}
}
if (user->registered == REG_ALL)
{
user->IncreasePenalty(10);
FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user, oldnick));
}
return CMD_SUCCESS;
}
COMMAND_INIT(CommandNick)
|
