Custom OpenWrt firmware, create Radius Server, software and database for create a multiple access hotspot for free WI FI

We need to have a customized OpenWRT firmware to be installed on a multiple numbers of TP Link WR841n routers. The idea is to create a public multiple-access hot spot for a Free Wifi usage. The router will have to guarantee the internet access to the connected devices (iphones, android phones, windows phones, blackberry phones) checking the device MAC address presence into the RADIUS server recorded database list. If the device MAC address is present into the recorded RADIUS server records à the device will have the free internet connection. If the device MAC address will not be present into the RADIUS server records, the router will re-direct to device to a captive portal page. We will need also the creation of the registration page (to be placed into the Captive Portal) in order to register the MAC address devices into the RADIUS server database. Moreover the registration page should ask also for few other personal information of the device owners that will be stored in another specific database. Furthermore, the router should send all the connection and disconnection LOG to a dedicated database in order to have full traceability of the people connected to the hot-spots. Thanks and Regards