[srslte-users] srsUE to not actually Attach (Creating a PDSCH Sniffer)

[Merlin Chlosta]

Hi Dylanger,

the Random Access Procedure is not required since it assigns the UE a new C-RNTI, while you want to follow others. The hack from the other thread makes srsUE immediately go into RRC IDLE state without quitting the application -- in that state, it naturally receives paging messages.

There so no such hack to create a sniffer; it's a different application.

Merlin

Am Montag, 10. Dezember 2018, 20:07:04 CST schrieb Dylanger Daly:
> Hey Guys,
> 
> I'm trying to create a PDSCH sniffer with srsUE.
> 
> I'd like srsUE to follow the C-RNTI for any and all UEs connected, then
> parse the data out to a pcap, I believe this should be possible with srsUE.
> 
> In an old thread (
> http://www.softwareradiosystems.com/pipermail/srslte-users/2016-February/000156.html),
> Paul recommends editing the `write_pdu_bcch_dlsch` function to replace the
> send_con_request with rrc_connection_release.
> 
> However it looks like things have shifted a little since that thread, also,
> would this _just_ give me Paging Messages? (0xFFFE), I'd much rather parse
> everything I can, for example, RRC Messages for other devices.
> 
> Do I need to RACH? Because I'm not actually sending any data, I shouldn't
> need to, right?
> 
> Any help would be appreciated, thank you!
>