EasyMesh(unified-wifi-mesh) Porting on Banana Pi R4

Scope

Goal of this document helps RDK-B community to Port Unified-easy-mesh on to their Gateway/Extender platforms

Assumption

• We assume that the development done on raspbian OS have enabled all the compiler options - Platform Agnostic C++ Coding for RDK-B

Test EM on Raspbian OS

• unified-wifi-mesh on RDK-B

Use cases

• R5 Specification

• Controller	Agent
  Banana Pi R4(RDK-B)	Banana Pi R4(RDK-B)
  Banana Pi R4(RDK-B)	RPI4(Raspbian)
  RPI4(Raspbian)	Banana Pi R4(RDK-B)

• R6 specification with Wi-Fi 7

Use case diagram

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Generic Porting stages

• Yocto support
  • Done for all recipes
    • mysqlconnector-cpp (mysql-connector-cpp_1.1.19 New recipe)
    • MariadDB (From openembedded)
    • unified-wifi-mesh(unified-wifi-mesh.bb)

    • ccsp-one-wifi-libhebus.bb(New recipe)

• New cli migration
• Golang support
• Segmentation faults fixing

Current state

• Done

  • Brought up yocto support
  • Supported build configuration
  • Compiled EM code with legacy cli
  • Observerving segmentation faults due to yocto compiler being too strict about memory and stack
    • Fix #1 - https://github.com/rdkcentral/unified-wifi-mesh/commit/3fd8e4bac0b86c4a92f804791e318265fc78a6d5
    • Other crashes (Will retest the same in new cli)

      • <<OneWifiMeshCli>>: reset erouter0 bananapi encode_config_reset:354: {

      • 
        

        void em_cmd_t::init(dm_easy_mesh_t *dm)
        {
            m_em_candidates = queue_create();
            m_data_model.init();
            m_data_model = *dm; //--------- segmentation fault only in RDK-B,Not in raspbian - pls refer - platform agnostic c++ code section
        }
      • 
         

      • (gdb) bt #0  0x0000000000417fb8 in em_cmd_t::init (this=this@entry=0x7f8b4b7010, dm=dm@entry=0x7f8b7fe690)     at ../../../git/src/ctrl/../../src/cmd/em_cmd.cpp:127 #1  0x0000000000418764 in em_cmd_t::em_cmd_t (this=0x7f8b4b7010, type=em_cmd_type_reset,     param=<error reading variable: Cannot access memory at address 0x7ffc9a6470>, dm=...)     at ../../../git/src/ctrl/../../src/cmd/em_cmd.cpp:703 Backtrace stopped: Cannot access memory at address 0x7ffc9a63f8

• Ongoing

  • Golang support in RDK-B added
  • ongoing with latest cli in progress
    • Creating yocto recipe to compile cli go code from yocto
    • Will retest the crashes and update 

Next phase

• Optimizing mariaDB - Target to keep size < 10 MB
• Package Manager
• Stripped onewifi for AP extender

Gateway specific steps

• EasyMesh controller integration - On Going
• Test with BPI R4 controller & RPI4 Agent - TBD
• Test with with BPI R4 controller & BPI R4 agent - TBD

Extender specific steps

• OSS image with SoC specific changes done
• Integration of OneWifi on going
• EasyMesh Agent - To start after Onewifi integration
• Testing with RPI4 controller and BPI R4 Extender

Platform agnostic c++ coding

• Platform Agnostic C++ Coding for RDK-B

References