Exemplo n.º 1
0
	/* @return 1 to block the command, 0 to allow */
	virtual int OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line) {
		if (!validated || !ghosting) { return 0; }

		if (command == "NICK") {
			if (user->registered != REG_ALL) {
				/* Nick in use, ghosting is on if we reach here so process */
				if (ServerInstance->FindNickOnly(parameters[0])) {
					/* We just let the user keep his UUID nick and fake further
					 * down that the initial NICK was ok. For now just store
					 * their wanted nick.
					 */
					std::string* authnick = new std::string(parameters[0]);
					user->Extend("wantsnick", authnick);
					/* since we cheat here, make them look as if they have passed
					 * REG_NICK checks. HACK warning! Well its all hack this bit :)
					 */
					user->registered = (user->registered | REG_NICK);

					/* if NICK is sent after USER thus making the user fully NICKUSER
					 * regged, we better trigger OnUserRegister since cmd_nick would
					 * normally do this. Since we handle NICK we got to check and do it.
					 */
					if (user->registered == REG_NICKUSER) {
						int MOD_RESULT = 0;
						FOREACH_RESULT(I_OnUserRegister,OnUserRegister(user));
						if (MOD_RESULT > 0) { return 1; }
					}

					/* Dont let inspircd process the command, we just did */
					return 1;
				}
			}
		}
		return 0;
	}
Exemplo n.º 2
0
CmdResult cmd_user::Handle (const char** parameters, int pcnt, userrec *user)
{
	/* A user may only send the USER command once */
	if (!(user->registered & REG_USER))
	{
		if (!ServerInstance->IsIdent(parameters[0]))
		{
			/*
			 * RFC says we must use this numeric, so we do. Let's make it a little more nub friendly though. :)
			 *  -- Craig, and then w00t.
			 */
			user->WriteServ("461 %s USER :Your username is not valid",user->nick);
			return CMD_FAILURE;
		}
		else
		{
			/*
			 * The ident field is IDENTMAX+2 in size to account for +1 for the optional
			 * ~ character, and +1 for null termination, therefore we can safely use up to
			 * IDENTMAX here.
			 */
			strlcpy(user->ident, parameters[0], IDENTMAX);
			strlcpy(user->fullname, *parameters[3] ? parameters[3] : "No info", MAXGECOS);
			user->registered = (user->registered | REG_USER);
		}
	}
	else
	{
		user->WriteServ("462 %s :You may not reregister",user->nick);
		return CMD_FAILURE;
	}

	/* parameters 2 and 3 are local and remote hosts, and are ignored */
	if (user->registered == REG_NICKUSER)
	{
		int MOD_RESULT = 0;
		/* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
		if (ServerInstance->next_call > ServerInstance->Time() + ServerInstance->Config->dns_timeout)
			ServerInstance->next_call = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
		FOREACH_RESULT(I_OnUserRegister,OnUserRegister(user));
		if (MOD_RESULT > 0)
			return CMD_FAILURE;

	}

	return CMD_SUCCESS;
}
Exemplo n.º 3
0
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));
	}
}
Exemplo n.º 4
0
/** 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;

}