Deployment of BMC

[nzalik]

I tried deploying BMC on my machine without much success. With your permission, I will now detail the issues I am facing:

There are several undefined values such as IPPROTO_UDP, IPPROTO_TCP, u16, u32 when I open the code with my VS Code editor. However, I noticed that the code compiles successfully, and the bmc_tx_filter can be properly attached to a network interface. The problem occurs when the program reaches the line "__be16 sport = udp->source" in the bmc_tx_filter function. My question is, can these undefined values cause execution issues in the kernel? If so, how can I resolve these undefined value problems?

Regarding the bmc_tx_filter function exposed at /sys/fs/bpf/, after tracing the execution, I noticed that the bmc_update_cache function is called with the instruction "bpf_tail_call(skb, &map_progs_tc, BMC_PROG_TC_UPDATE_CACHE)". Assuming that skb is properly defined and the constant BMC_PROG_TC_UPDATE_CACHE is also defined, I suspect that the issue might be related to the map map_progs_tc.
My question is, at what point are the data added to this map? Are these data loaded from a userspace program? In short, could you please provide some possible reasons for the failure of the bmc_update_cache function call?

After compiling BMC and obtaining the binary, I ran "sudo ./bmc wlo1" to attach the program to my Wi-Fi network interface. However, as you mentioned in the readme.md, it failed. Nevertheless, this instruction exposes bmc_tx_filter in /sys/fs/bpf/, allowing me to successfully attach bmc_tx_filter to my network interface using the commands mentioned in the readme.md.
My question is, how can I expose the bmc_rx_filter to attach it to my network interface for processing incoming packets?

I'm using Linux Mint with a kenel version of 5.4

Thank you. @YoannGh