ipv6 over ble sniffing

[her0gyu]

Hi, I try to capture ipv6 over ble packet. So, I construct system like, nrf dk 51(with sensor) - rasp nrf-dk 51 is equipped with coap-server source and rasp doing like a ipv6 router. And I try to use nrf51-dongle to capture the packet. but I failed, I just succeeded to capture advertisement pacekt and connect request packet. But,I want to capture the packet which is subsequent request packet like connect response packet. Because I want to study stage of IPSP and l2cap. Could you instruct me how to capture connect request after packet? And I want to study IPSP detail If Anybody knows of it well, plz help me !!

[David Edwin]

There is no connect response packet in the BTLE specification. You need to select the device in the PC sniffer console, so you can see the selected "X" on the device that you are sniffing then, you should be able to capture all the IPSP and the l2cap related packets.

[her0gyu]

I tried :( but I can only capture the packet before L2CAP connection. I caputure the l2cap connection on the raspberry pi using HCI interface. but cannot capture the Router Service Discovery stage. I am really curious about after l2cap connection how GATT operates on. plz help me how to full stage packet.

[David Edwin]

Update your jlink to v5.10i or later. Did the Sniffer capture the connect request packet, if not try again until the connect request packet is captured. You need to reset the board for each try. (a board plugout plugin may be preferred)