discuss-gnuradio
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Proper way to split ZMQ 1-to-many REP-REQ sinks


From: Hud Bin Abdul Wahab
Subject: Proper way to split ZMQ 1-to-many REP-REQ sinks
Date: Sat, 4 Jan 2025 00:06:35 +0000

Hello

I am using srsRAN and using ZMQ/GNUradio to broker an gNB-UE connection and I want to simulate a man-in-the-middle attack where there is a passive listener listening to e.g. DL transmission. I tried following this srsRAN tutorial for multi-ue, but the UE won't attach https://docs.srsran.com/projects/project/en/latest/tutorials/source/srsUE/source/index.html#multi-ue-emulation

I then tried to use something like a threshold block that essentially blocks the branch outside of gNB-UE, and once RRC is connected, I can unblock and how the signal goes through - something similar to https://dsp.stackexchange.com/questions/67657/record-signal-after-threshold-reach-in-gnu-radio (see attached)

The UE attaches, but the moment I unblock and let signal pass through to the listener, the transmission stops. It also does this weird funky thing when I shut the listener off the signal passes through momentarily - this happens haphazardly and hard to reproduce.

I am wondering if there is a better way to split the ZMQ REQ-REP where UE attaches, and connection is stable. I appreciate the help

Best
Hud
Postdoc UWYO

Attachment: passive_flow.png
Description: passive_flow.png


reply via email to

[Prev in Thread] Current Thread [Next in Thread]