RACH Replay

[cueltschey]

We will be building upon the PDCCH sniffer in this repo to support RACH replay attacks. Here are the steps involved in the replay attack.

1. Listen for a PDCCH message
2. brute force the CRC using a list of possible RNTIs
3. Once the RNTI is know cache for later use in decoding
4. Modify the DCI to contain incorrect sync info
5. Package the DCI with a new CRC to the UE

This attack will hopefully result in UE disconnect, and can be targeted towards certain users.

[cueltschey]

Currently working on fixing the build system and slimming down for future development

[cueltschey]

The build system is fixed. I will merge these improvements to the sniffer. @sushant-XD is taking over some of the development. Specifically we have two new goals:

1. Cache valid RNTIs to improve performance
2. Send metrics to influxdb on a separate thread. Use this header file for sending metrics to the database.

[cueltschey]

We have collected IQ of RACH preambles going from srsUE to srs gNB. Our first step will be to develop a sniffer that can decode the preambles. Then we will develop a flooder to fabricate and broadcast fake preambles.