rewrite sock_op program with libbpf 1.0+

[SirHao]

Description

This commit rewrite the src/29-sockops with libbpf provided in third-party, where current code cannot work. ( See issue75)

Fixes # (issue) 75

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Complie, Load and Attach

$ make && ./load.sh
...load sucess...
$ bpftool prog show
107: sock_ops  name bpf_sockops_handler  tag e22e1120368ab3cc  gpl
        loaded_at 2023-12-06T13:04:56+0800  uid 0
        xlated 360B  jited 209B  memlock 4096B  map_ids 42,40
        btf_id 159
114: sk_msg  name bpf_redir  tag 907de5919d920159  gpl
        loaded_at 2023-12-06T13:04:56+0800  uid 0
        xlated 248B  jited 167B  memlock 4096B  map_ids 40
        btf_id 165

• Iperf with bpf_output and tcpdump

./trace_bpf_output.sh # trace the output of sock_op

After start iperf as below, we can see the output of connection tracing from the script above

$ nohup iperf -s &
$ iperf -c 127.0.0.1

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[SirHao]

@yunwei37 Can u please help me to review this PR? Thanks a lot

[yunwei37]

Thanks a lot for your contribution!

[yunwei37]

Would you like to update the CI in GitHub actions so it can be tested automatically?

[yunwei37]

Examples can be found in https://github.com/eunomia-bpf/bpf-developer-tutorial/blob/main/.github/workflows/test-libbpf.yml

[SirHao]

Would you like to update the CI in GitHub actions so it can be tested automatically?

@yunwei37 I am sorry although the current version are built with Makefile, it dosen't have an userspace binary to load the bpf program. (em... just like the previous version works with bpftool shell script). The makefile is just used to fetch the in-project depedencies and enable the program run with latest libbpf syntax.

[yunwei37]

That's ok. Maybe you can add another workflow to test it. You can use commands you like and not limited to makefile.

If you are not familiar with GitHub actions, I can merge this first : ) That's ok

[SirHao]

That's ok. Maybe you can add another workflow to test it. You can use commands you like and not limited to makefile.

If you are not familiar with GitHub actions, I can merge this first : ) That's ok

@yunwei37 I am indeed not familiar with Github action. Thus I have made a double check in another one environment and this project still can works. Just merge it please~

[yunwei37]

Ok. Thanks again!