void cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
{
char oldnick[NICKMAX];
if (pcnt < 1)
{
ServerInstance->Log(DEBUG,"not enough params for handle_nick");
return;
}
if (!parameters[0])
{
ServerInstance->Log(DEBUG,"invalid parameter passed to handle_nick");
return;
}
if (!parameters[0][0])
{
ServerInstance->Log(DEBUG,"zero length new nick passed to handle_nick");
return;
}
if (!user)
{
ServerInstance->Log(DEBUG,"invalid user passed to handle_nick");
return;
}
if (!user->nick)
{
ServerInstance->Log(DEBUG,"invalid old nick passed to handle_nick");
return;
}
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;
/* 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.
*/
ServerInstance->Log(DEBUG,"old nick is new nick, not updating hash (case change only)");
strlcpy(oldnick, user->nick, NICKMAX - 1);
int MOD_RESULT = 0;
FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
if (MOD_RESULT)
return;
if (user->registered == REG_ALL)
user->WriteCommon("NICK %s",parameters[0]);
strlcpy(user->nick, parameters[0], NICKMAX - 1);
FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
return;
}
else
{
if ((*parameters[0] == ':') && (*(parameters[0]+1) != 0))
{
parameters[0]++;
}
char* mq = ServerInstance->XLines->matches_qline(parameters[0]);
if (mq)
{
ServerInstance->WriteOpers("*** Q-Lined nickname %s from %s!%s@%s: %s",parameters[0],user->nick,user->ident,user->host,mq);
user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0],mq);
return;
}
if ((ServerInstance->FindNick(parameters[0])) && (ServerInstance->FindNick(parameters[0]) != user))
{
user->WriteServ("433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
return;
}
}
if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
{
user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
return;
}
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;
}
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;
if (!user->nick) return;
strlcpy(user->nick, parameters[0], NICKMAX - 1);
ServerInstance->Log(DEBUG,"new nick set: %s",user->nick);
if (user->registered < REG_NICKUSER)
{
user->registered = (user->registered | REG_NICK);
// dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
// and unless we're lucky we'll get a duff one later on.
//user->dns_done = (!lookup_dns(user->nick));
//if (user->dns_done)
// ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
if (ServerInstance->Config->NoUserDns)
{
user->dns_done = true;
}
else
{
user->StartDNSLookup();
if (user->dns_done)
ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
}
}
if (user->registered == REG_NICKUSER)
{
/* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
//ConnectUser(user,NULL);
}
if (user->registered == REG_ALL)
{
FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
}
}
bool User::ChangeNick(const std::string& newnick, bool force)
{
ModResult MOD_RESULT;
if (force)
ServerInstance->NICKForced.set(this, 1);
FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
ServerInstance->NICKForced.set(this, 0);
if (MOD_RESULT == MOD_RES_DENY)
{
ServerInstance->stats->statsCollisions++;
return false;
}
if (assign(newnick) == assign(nick))
{
// case change, don't need to check Q:lines and such
// and, if it's identical including case, we can leave right now
if (newnick == nick)
return true;
}
else
{
/*
* Don't check Q:Lines if it's a server-enforced change, just on the off-chance some f*****g *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(this) && !force)
{
XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
if (mq)
{
if (this->registered == REG_ALL)
{
ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
}
this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
return false;
}
if (ServerInstance->Config->RestrictBannedUsers)
{
for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
{
Channel *chan = *i;
if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
{
this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
return false;
}
}
}
}
/*
* 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(newnick);
if (InUse && (InUse != this))
{
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());
ServerInstance->Users->clientlist->erase(InUse->nick);
(*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
InUse->nick = InUse->uuid;
InUse->InvalidateCache();
InUse->registered &= ~REG_NICK;
}
else
{
/* No camping, tell the incoming user to stop trying to change nick ;p */
this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
return false;
}
}
}
if (this->registered == REG_ALL)
this->WriteCommon("NICK %s",newnick.c_str());
std::string oldnick = nick;
nick = newnick;
InvalidateCache();
ServerInstance->Users->clientlist->erase(oldnick);
(*(ServerInstance->Users->clientlist))[newnick] = this;
if (registered == REG_ALL)
FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
return true;
}
/** 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 (!allowinvalid)
{
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;
std::deque<classbase*> dummy;
p2.push_back(user->uuid);
this->HandleInternal(1, dummy);
this->Handle(p2, user);
this->HandleInternal(0, dummy);
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);
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].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 f*****g *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 (!allowinvalid || !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);
}
user->WriteNumeric(432, "%s %s :Invalid nickname: %s",user->nick.c_str(), parameters[0].c_str(), mq->reason);
return CMD_FAILURE;
}
if (ServerInstance->Config->RestrictBannedUsers)
{
for (UCListIter i = user->chans.begin(); i != user->chans.end(); i++)
{
Channel *chan = i->first;
if (chan->GetStatus(user) < STATUS_VOICE && 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;
}
}
}
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;
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();
/* Update display nicks */
for (UCListIter v = user->chans.begin(); v != user->chans.end(); v++)
{
CUList* ulist = v->first->GetUsers();
CUList::iterator i = ulist->find(user);
if (i != ulist->end())
i->second = user->nick;
}
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 */
MOD_RESULT = 0;
FOREACH_RESULT(I_OnUserRegister,OnUserRegister(user));
if (MOD_RESULT > 0)
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;
}
