https://insinuator.net/tags/s1ap/ Recent content in S1AP on Insinuator.net - Bold Statements Hugo en-us Wed, 25 Jun 2014 00:00:00 +0000 https://insinuator.net/2014/06/new-tool-s1ap_enum/ Wed, 25 Jun 2014 00:00:00 +0000 https://insinuator.net/2014/06/new-tool-s1ap_enum/ <p>As we continue our research in the 3GPP protocol world, there is a new tool for you to play with. It is called <strong>s1ap_enum</strong> and thats also what it does  😉</p> <p>The tool itself is written in erlang, as i found no other free ASN.1 parser that is able to parse those fancy 3GPP protocol specs. It connects to an MME on sctp/36412 and tries to initiate a S1AP session by sending an S1SetupRequest PDU. To establish a S1AP session with an MME the right MCC and MNC are needed in the PLMNIdentity. The tool tries to guess the right MCC/MNC combinations. It comes with a preset of known MCC/MNC pairs from <a href="http://www.mcc-mnc.com/">mcc-mnc.com</a>, but can try all other combinations as well.</p>