Aurora.3/code/modules/admin/IsBanned.dm

//Blocks an attempt to connect before even creating our client datum thing.
world/IsBanned(key,address,computer_id)
	if(ckey(key) in admin_datums)
		return ..()

	if(config.ban_legacy_system)

		//Guest Checking
		if( !guests_allowed && IsGuestKey(key) )
			log_access("Failed Login: [key] - Guests not allowed")
			message_admins("\blue Failed Login: [key] - Guests not allowed")
			return list("reason"="guest", "desc"="\nReason: Guests not allowed. Please sign in with a byond account.")

		//check if the IP address is a known TOR node
		if( config && config.ToRban && ToRban_isbanned(address) )
			log_access("Failed Login: [src] - Banned: ToR")
			message_admins("\blue Failed Login: [src] - Banned: ToR")
			//ban their computer_id and ckey for posterity
			AddBan(ckey(key), computer_id, "Use of ToR", "Automated Ban", 0, 0)
			return list("reason"="Using ToR", "desc"="\nReason: The network you are using to connect has been banned.\nIf you believe this is a mistake, please request help at [config.banappeals]")

		//Ban Checking
		. = CheckBan( ckey(key), computer_id, address )
		if(.)
			log_access("Failed Login: [key] [computer_id] [address] - Banned [.["reason"]]")
			message_admins("\blue Failed Login: [key] id:[computer_id] ip:[address] - Banned [.["reason"]]")
			return .

		return ..()	//default pager ban stuff

	else

		var/ckeytext = ckey(key)

		if(!establish_db_connection())
			world.log << "Ban database connection failure. Key [ckeytext] not checked"
			diary << "Ban database connection failure. Key [ckeytext] not checked"
			return

		var/DBQuery/query = dbcon.NewQuery("SELECT ckey, ip, computerid, a_ckey, reason, expiration_time, duration, bantime, bantype FROM erro_Ban WHERE (ckey = '[ckeytext]' OR ip = '[address]' OR computerid = '[computer_id]') AND (bantype = 'PERMABAN'  OR (bantype = 'TEMPBAN' AND expiration_time > Now())) AND isnull(unbanned)")

		query.Execute()

		while(query.NextRow())
			var/pckey = query.item[1]
			//var/pip = query.item[2]
			//var/pcid = query.item[3]
			var/ackey = query.item[4]
			var/reason = query.item[5]
			var/expiration = query.item[6]
			var/duration = query.item[7]
			var/bantime = query.item[8]
			var/bantype = query.item[9]

			var/expires = ""
			if(text2num(duration) > 0)
				expires = " The ban is for [duration] minutes and expires on [expiration] (server time)."

			var/desc = "\nReason: You, or another user of this computer or connection ([pckey]) is banned from playing here. The ban reason is:\n[reason]\nThis ban was applied by [ackey] on [bantime], [expires]"

			return list("reason"="[bantype]", "desc"="[desc]")

		return ..()	//default pager ban stuff