- /* 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
- {
- /*
- * 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 (!allowinvalid || !IS_LOCAL(user))
- {
- XLine* mq = ServerInstance->XLines->MatchesLine("Q",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->WriteNumeric(432, "%s %s :Invalid nickname: %s",user->nick,parameters[0], mq->reason);
- 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) && ((ServerInstance->IsNick(parameters[0]) || allowinvalid)))
- {
- 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);
- InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick, InUse->nick);
- InUse->UpdateNickHash(InUse->uuid);
- strlcpy(InUse->nick, InUse->uuid, NICKMAX - 1);
- 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 : "*", parameters[0]);
- return CMD_FAILURE;
- }
- }