Lup Yuen Lee 李立源 @lupyuen@qoto.org

South African brothers vanish along with US$3.6 billion of #Bitcoin

https://www.straitstimes.com/business/banking/south-african-brothers-vanish-along-with-48-billion-of-investors-bitcoin

EA ignored domain vulnerabilities for months despite warnings and breaches

https://www.zdnet.com/article/ea-ignored-domain-vulnerabilities-for-months-despite-warnings-and-breaches/

#Linux 5.13 Release - Notable changes, Arm, MIPS and RISC-V architectures

https://www.cnx-software.com/2021/06/28/linux-5-13-release-notable-changes-arm-mips-and-risc-v-architectures/

Chicken Soup with carrots, potatoes, onions, garlic, ginger and barley 🤤

Culinary Experiment 😂

In this Chinese tower block, residents pay to take the lift home

https://www.cnn.com/2021/06/26/asia/china-elevators-intl-hnk-dst/index.html

From Now On: We shall read and understand the AliOS / RivieraWaves Source Code ... While comparing it with the Decompiled Code for #BL602 libwifi ... Just to be sure that they are the same 🤝

https://github.com/lupyuen/AliOS-Things/tree/master/platform/mcu/bk7231u/beken/ip/ke

"Linux for riscv32?"

https://www.reddit.com/r/RISCV/comments/o8vvuy/linux_for_riscv32/?utm_medium=android_app&utm_source=share

AliOS for Beken BK7231U WiFi SoC contains LMAC Firmware Code ... Is this the same LMAC Firmware that runs on #BL602's #WiFi Radio? 🤔 Super Exciting!

https://github.com/lupyuen/AliOS-Things/tree/master/platform/mcu/bk7231u/beken/ip/lmac/src

The AliOS / RivieraWaves code we saw earlier was for Beken BK7231U WiFi + BLE SoC ... Is it related to #BL602? 🤔

http://www.bekencorp.com/en/goods/detail/cid/13.html

Lesson Learnt: GitHub Search is our very good friend for Reverse Engineering! 👍

https://github.com/search?l=C&o=asc&q=ke_evt_schedule&s=indexed&type=Code

Now the #BL602 #WiFi Stack gets clearer ... We're actually reading the WiFi Driver Code by CEVA RivieraWaves! 💡

https://www.ceva-dsp.com/product/rivierawaves-wi-fi-platforms/

But does "ke_evt_schedule" really come from AliOS? Not quite ... "ke_evt_schedule" actually comes from ... CEVA RivieraWaves! 😲

https://github.com/mclown/AliOS-Things/blob/master/platform/mcu/bk7231u/beken/ip/ke/ke_event.c#L203-L231

#BL602 "wifi_main" calls "ke_evt_schedule" to do #WiFi Tasks ... GitHub Search shows that "ke_evt_schedule" is also defined in ... AliOS! 😲

https://github.com/lupyuen/bl602nutcracker1/blob/main/bl602_demo_wifi.c#L28721-L28737

"wifi_main" lives in the mysterious #BL602 #WiFi Library "libwifi" ... Let's study the decompiled C code (thanks to BraveHeartFLOSSDev and Ghidra)

https://github.com/lupyuen/bl602nutcracker1/blob/main/bl602_demo_wifi.c#L32959-L33006

#BL602 Firmware starts the #WiFi Stack ... By creating a Background Task that runs wifi_main ... Let's hunt for wifi_main

https://github.com/lupyuen/bl_iot_sdk/blob/master/customer_app/bl602_demo_wifi/bl602_demo_wifi/main.c#L729-L747

Moving away from LMAC Firmware (since we got no code) ... Let's study the mysterious #BL602 #WiFi Library "libwifi" ... Which has been decompiled into C by BraveHeartFLOSSDev

https://github.com/BraveHeartFLOSSDev/bl602nutcracker1