from pythonbpf import bpf, map, section, bpfglobal, compile_to_ir, compile
from pythonbpf.maps import HashMap
from pythonbpf.helper import XDP_PASS
from vmlinux import TASK_COMM_LEN  # noqa: F401
from vmlinux import struct_xdp_md
from vmlinux import struct_trace_event_raw_sys_enter  # noqa: F401
from ctypes import c_int64

# Instructions to how to run this program
# 1. Install PythonBPF: pip install pythonbpf
# 2. Run the program: python examples/xdp_pass.py
# 3. Run the program with sudo: sudo tools/check.sh run examples/xdp_pass.o
# 4. Attach object file to any network device with something like ./check.sh xdp examples/xdp_pass.o tailscale0
# 5. send traffic through the device and observe effects

@bpf
@section("xdp")
def hello_world(ctx: struct_xdp_md) -> c_int64:
    return XDP_PASS


@bpf
@bpfglobal
def LICENSE() -> str:
    return "GPL"


compile_to_ir("xdp_pass.py", "xdp_pass.ll")
compile()