# SPDX-License-Identifier: GPL-2.0-only
# This file is part of Scapy
# See https://scapy.net/ for more information

"""
Commonly used structures shared across Scapy
"""

import ctypes


class bpf_insn(ctypes.Structure):
    """"The BPF instruction data structure"""
    _fields_ = [("code", ctypes.c_ushort),
                ("jt", ctypes.c_ubyte),
                ("jf", ctypes.c_ubyte),
                ("k", ctypes.c_int)]


class bpf_program(ctypes.Structure):
    """"Structure for BIOCSETF"""
    _fields_ = [('bf_len', ctypes.c_int),
                ('bf_insns', ctypes.POINTER(bpf_insn))]


class sock_fprog(ctypes.Structure):
    """"Structure for SO_ATTACH_FILTER"""
    _fields_ = [('len', ctypes.c_ushort),
                ('filter', ctypes.POINTER(bpf_insn))]