func()

in internal/ip/ip_bpf_linux.go [31:50]

• 19 lines of code
• 2 McCabe index (conditional complexity)

func (r *recvSource) attachBPF(filter []bpf.RawInstruction) error {
	prog := syscall.SockFprog{
		Len:    uint16(len(filter)),
		Filter: (*syscall.SockFilter)(unsafe.Pointer(&filter[0])),
	}
	_, _, err := syscall.Syscall6(
		syscall.SYS_SETSOCKOPT,
		uintptr(r.fd),
		uintptr(syscall.SOL_SOCKET),
		uintptr(syscall.SO_ATTACH_FILTER),
		uintptr(unsafe.Pointer(&prog)),
		uintptr(uint32(unsafe.Sizeof(prog))),
		0,
	)
	if err != 0 {
		return err
	}

	return nil
}