# $Id: 80211.py 53 2008-12-18 01:22:57Z jon.oberheide $
# -*- coding: utf-8 -*-
"""IEEE 802.11."""
from __future__ import print_function
from __future__ import absolute_import

import struct

from . import dpkt
from .compat import ntole

# Frame Types
MGMT_TYPE = 0
CTL_TYPE = 1
DATA_TYPE = 2

# Frame Sub-Types
M_ASSOC_REQ = 0
M_ASSOC_RESP = 1
M_REASSOC_REQ = 2
M_REASSOC_RESP = 3
M_PROBE_REQ = 4
M_PROBE_RESP = 5
M_BEACON = 8
M_ATIM = 9
M_DISASSOC = 10
M_AUTH = 11
M_DEAUTH = 12
M_ACTION = 13
C_BLOCK_ACK_REQ = 8
C_BLOCK_ACK = 9
C_PS_POLL = 10
C_RTS = 11
C_CTS = 12
C_ACK = 13
C_CF_END = 14
C_CF_END_ACK = 15
D_DATA = 0
D_DATA_CF_ACK = 1
D_DATA_CF_POLL = 2
D_DATA_CF_ACK_POLL = 3
D_NULL = 4
D_CF_ACK = 5
D_CF_POLL = 6
D_CF_ACK_POLL = 7
D_QOS_DATA = 8
D_QOS_CF_ACK = 9
D_QOS_CF_POLL = 10
D_QOS_CF_ACK_POLL = 11
D_QOS_NULL = 12
D_QOS_CF_POLL_EMPTY = 14

TO_DS_FLAG = 10
FROM_DS_FLAG = 1
INTER_DS_FLAG = 11

# Bitshifts for Frame Control
_VERSION_MASK = 0x0300
_TYPE_MASK = 0x0c00
_SUBTYPE_MASK = 0xf000
_TO_DS_MASK = 0x0001
_FROM_DS_MASK = 0x0002
_MORE_FRAG_MASK = 0x0004
_RETRY_MASK = 0x0008
_PWR_MGT_MASK = 0x0010
_MORE_DATA_MASK = 0x0020
_WEP_MASK = 0x0040
_ORDER_MASK = 0x0080
_VERSION_SHIFT = 8
_TYPE_SHIFT = 10
_SUBTYPE_SHIFT = 12
_TO_DS_SHIFT = 0
_FROM_DS_SHIFT = 1
_MORE_FRAG_SHIFT = 2
_RETRY_SHIFT = 3
_PWR_MGT_SHIFT = 4
_MORE_DATA_SHIFT = 5
_WEP_SHIFT = 6
_ORDER_SHIFT = 7

# IEs
IE_SSID = 0
IE_RATES = 1
IE_FH = 2
IE_DS = 3
IE_CF = 4
IE_TIM = 5
IE_IBSS = 6
IE_HT_CAPA = 45
IE_ESR = 50
IE_HT_INFO = 61

FCS_LENGTH = 4

FRAMES_WITH_CAPABILITY = [M_BEACON, M_ASSOC_RESP, M_ASSOC_REQ, M_REASSOC_REQ, ]

# Block Ack control constants
_ACK_POLICY_SHIFT = 0
_MULTI_TID_SHIFT = 1
_COMPRESSED_SHIFT = 2
_TID_SHIFT = 12

_ACK_POLICY_MASK = 0x0001
_MULTI_TID_MASK = 0x0002
_COMPRESSED_MASK = 0x0004
_TID_MASK = 0xf000

_COMPRESSED_BMP_LENGTH = 8
_BMP_LENGTH = 128

# Action frame categories
BLOCK_ACK = 3

# Block ack category action codes
BLOCK_ACK_CODE_REQUEST = 0
BLOCK_ACK_CODE_RESPONSE = 1
BLOCK_ACK_CODE_DELBA = 2


class IEEE80211(dpkt.Packet):
    """IEEE 802.11.

    TODO: Longer class information....

    Attributes:
        __hdr__: Header fields of IEEE802.11.
        TODO.
    """

    __hdr__ = (
        ('framectl', 'H', 0),
        ('duration', 'H', 0)
    )

    # The standard really defines the entire MAC protocol as little-endian on the wire,
    # however there is broken logic in the rest of the module preventing this from working right now
    #  __byte_order__ = '<'

    @property
    def version(self):
        return (self.framectl & _VERSION_MASK) >> _VERSION_SHIFT

    @version.setter
    def version(self, val):
        self.framectl = (val << _VERSION_SHIFT) | (self.framectl & ~_VERSION_MASK)

    @property
    def type(self):
        return (self.framectl & _TYPE_MASK) >> _TYPE_SHIFT

    @type.setter
    def type(self, val):
        self.framectl = (val << _TYPE_SHIFT) | (self.framectl & ~_TYPE_MASK)

    @property
    def subtype(self):
        return (self.framectl & _SUBTYPE_MASK) >> _SUBTYPE_SHIFT

    @subtype.setter
    def subtype(self, val):
        self.framectl = (val << _SUBTYPE_SHIFT) | (self.framectl & ~_SUBTYPE_MASK)

    @property
    def to_ds(self):
        return (self.framectl & _TO_DS_MASK) >> _TO_DS_SHIFT

    @to_ds.setter
    def to_ds(self, val):
        self.framectl = (val << _TO_DS_SHIFT) | (self.framectl & ~_TO_DS_MASK)

    @property
    def from_ds(self):
        return (self.framectl & _FROM_DS_MASK) >> _FROM_DS_SHIFT

    @from_ds.setter
    def from_ds(self, val):
        self.framectl = (val << _FROM_DS_SHIFT) | (self.framectl & ~_FROM_DS_MASK)

    @property
    def more_frag(self):
        return (self.framectl & _MORE_FRAG_MASK) >> _MORE_FRAG_SHIFT

    @more_frag.setter
    def more_frag(self, val):
        self.framectl = (val << _MORE_FRAG_SHIFT) | (self.framectl & ~_MORE_FRAG_MASK)

    @property
    def retry(self):
        return (self.framectl & _RETRY_MASK) >> _RETRY_SHIFT

    @retry.setter
    def retry(self, val):
        self.framectl = (val << _RETRY_SHIFT) | (self.framectl & ~_RETRY_MASK)

    @property
    def pwr_mgt(self):
        return (self.framectl & _PWR_MGT_MASK) >> _PWR_MGT_SHIFT

    @pwr_mgt.setter
    def pwr_mgt(self, val):
        self.framectl = (val << _PWR_MGT_SHIFT) | (self.framectl & ~_PWR_MGT_MASK)

    @property
    def more_data(self):
        return (self.framectl & _MORE_DATA_MASK) >> _MORE_DATA_SHIFT

    @more_data.setter
    def more_data(self, val):
        self.framectl = (val << _MORE_DATA_SHIFT) | (self.framectl & ~_MORE_DATA_MASK)

    @property
    def wep(self):
        return (self.framectl & _WEP_MASK) >> _WEP_SHIFT

    @wep.setter
    def wep(self, val):
        self.framectl = (val << _WEP_SHIFT) | (self.framectl & ~_WEP_MASK)

    @property
    def order(self):
        return (self.framectl & _ORDER_MASK) >> _ORDER_SHIFT

    @order.setter
    def order(self, val):
        self.framectl = (val << _ORDER_SHIFT) | (self.framectl & ~_ORDER_MASK)

    def unpack_ies(self, buf):
        self.ies = []

        ie_decoder = {
            IE_SSID: ('ssid', self.IE),
            IE_RATES: ('rate', self.IE),
            IE_FH: ('fh', self.FH),
            IE_DS: ('ds', self.DS),
            IE_CF: ('cf', self.CF),
            IE_TIM: ('tim', self.TIM),
            IE_IBSS: ('ibss', self.IBSS),
            IE_HT_CAPA: ('ht_capa', self.IE),
            IE_ESR: ('esr', self.IE),
            IE_HT_INFO: ('ht_info', self.IE)
        }

        # each IE starts with an ID and a length
        while len(buf) > FCS_LENGTH:
            ie_id = struct.unpack('B', buf[:1])[0]
            try:
                parser = ie_decoder[ie_id][1]
                name = ie_decoder[ie_id][0]
            except KeyError:
                parser = self.IE
                name = 'ie_' + str(ie_id)
            ie = parser(buf)

            ie.data = buf[2:2 + ie.len]
            setattr(self, name, ie)
            self.ies.append(ie)
            buf = buf[2 + ie.len:]

    class Capability(object):
        def __init__(self, field):
            self.ess = field & 1
            self.ibss = (field >> 1) & 1
            self.cf_poll = (field >> 2) & 1
            self.cf_poll_req = (field >> 3) & 1
            self.privacy = (field >> 4) & 1
            self.short_preamble = (field >> 5) & 1
            self.pbcc = (field >> 6) & 1
            self.hopping = (field >> 7) & 1
            self.spec_mgmt = (field >> 8) & 1
            self.qos = (field >> 9) & 1
            self.short_slot = (field >> 10) & 1
            self.apsd = (field >> 11) & 1
            self.dsss = (field >> 13) & 1
            self.delayed_blk_ack = (field >> 14) & 1
            self.imm_blk_ack = (field >> 15) & 1

    def __init__(self, *args, **kwargs):
        if kwargs and 'fcs' in kwargs:
            self.fcs_present = kwargs.pop('fcs')
        else:
            self.fcs_present = False

        super(IEEE80211, self).__init__(*args, **kwargs)

    def unpack(self, buf):
        dpkt.Packet.unpack(self, buf)
        self.data = buf[self.__hdr_len__:]

        m_decoder = {
            M_BEACON: ('beacon', self.Beacon),
            M_ASSOC_REQ: ('assoc_req', self.Assoc_Req),
            M_ASSOC_RESP: ('assoc_resp', self.Assoc_Resp),
            M_DISASSOC: ('diassoc', self.Disassoc),
            M_REASSOC_REQ: ('reassoc_req', self.Reassoc_Req),
            M_REASSOC_RESP: ('reassoc_resp', self.Assoc_Resp),
            M_AUTH: ('auth', self.Auth),
            M_PROBE_RESP: ('probe_resp', self.Beacon),
            M_DEAUTH: ('deauth', self.Deauth),
            M_ACTION: ('action', self.Action)
        }

        c_decoder = {
            C_RTS: ('rts', self.RTS),
            C_CTS: ('cts', self.CTS),
            C_ACK: ('ack', self.ACK),
            C_BLOCK_ACK_REQ: ('bar', self.BlockAckReq),
            C_BLOCK_ACK: ('back', self.BlockAck),
            C_CF_END: ('cf_end', self.CFEnd),
        }

        d_dsData = {
            0: self.Data,
            FROM_DS_FLAG: self.DataFromDS,
            TO_DS_FLAG: self.DataToDS,
            INTER_DS_FLAG: self.DataInterDS
        }

        # For now decode everything with DATA. Haven't checked about other QoS
        # additions
        d_decoder = {
            # modified the decoder to consider the ToDS and FromDS flags
            # Omitting the 11 case for now
            D_DATA: ('data_frame', d_dsData),
            D_NULL: ('data_frame', d_dsData),
            D_QOS_DATA: ('data_frame', d_dsData),
            D_QOS_NULL: ('data_frame', d_dsData)
        }

        decoder = {
            MGMT_TYPE: m_decoder,
            CTL_TYPE: c_decoder,
            DATA_TYPE: d_decoder
        }

        # Strip off the FCS field
        if self.fcs_present:
            self.fcs = struct.unpack('<I', self.data[-1 * FCS_LENGTH:])[0]
            self.data = self.data[0: -1 * FCS_LENGTH]

        if self.type == MGMT_TYPE:
            self.mgmt = self.MGMT_Frame(self.data)
            self.data = self.mgmt.data
            if self.subtype == M_PROBE_REQ:
                self.unpack_ies(self.data)
                return
            if self.subtype == M_ATIM:
                return

        try:
            parser = decoder[self.type][self.subtype][1]
            name = decoder[self.type][self.subtype][0]
        except KeyError:
            raise dpkt.UnpackError("KeyError: type=%s subtype=%s" % (self.type, self.subtype))

        if self.type == DATA_TYPE:
            # need to grab the ToDS/FromDS info
            parser = parser[self.to_ds * 10 + self.from_ds]

        if self.type == MGMT_TYPE:
            field = parser(self.mgmt.data)
        else:
            field = parser(self.data)
            self.data = field

        setattr(self, name, field)

        if self.type == MGMT_TYPE:
            self.unpack_ies(field.data)
            if self.subtype in FRAMES_WITH_CAPABILITY:
                self.capability = self.Capability(ntole(field.capability))

        if self.type == DATA_TYPE and self.subtype == D_QOS_DATA:
            self.qos_data = self.QoS_Data(field.data)
            field.data = self.qos_data.data

        self.data = field.data

    class BlockAckReq(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
            ('ctl', 'H', 0),
            ('seq', 'H', 0),
        )

    class BlockAck(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
            ('ctl', 'H', 0),
            ('seq', 'H', 0),
        )

        @property
        def compressed(self):
            return (self.ctl & _COMPRESSED_MASK) >> _COMPRESSED_SHIFT

        @compressed.setter
        def compressed(self, val):
            self.ctl = (val << _COMPRESSED_SHIFT) | (self.ctl & ~_COMPRESSED_MASK)

        @property
        def ack_policy(self):
            return (self.ctl & _ACK_POLICY_MASK) >> _ACK_POLICY_SHIFT

        @ack_policy.setter
        def ack_policy(self, val):
            self.ctl = (val << _ACK_POLICY_SHIFT) | (self.ctl & ~_ACK_POLICY_MASK)

        @property
        def multi_tid(self):
            return (self.ctl & _MULTI_TID_MASK) >> _MULTI_TID_SHIFT

        @multi_tid.setter
        def multi_tid(self, val):
            self.ctl = (val << _MULTI_TID_SHIFT) | (self.ctl & ~_MULTI_TID_MASK)

        @property
        def tid(self):
            return (self.ctl & _TID_MASK) >> _TID_SHIFT

        @tid.setter
        def tid(self, val):
            self.ctl = (val << _TID_SHIFT) | (self.ctl & ~_TID_MASK)

        def unpack(self, buf):
            dpkt.Packet.unpack(self, buf)
            self.data = buf[self.__hdr_len__:]
            self.ctl = ntole(self.ctl)

            if self.compressed:
                self.bmp = struct.unpack('8s', self.data[0:_COMPRESSED_BMP_LENGTH])[0]
            else:
                self.bmp = struct.unpack('128s', self.data[0:_BMP_LENGTH])[0]
            self.data = self.data[len(self.__hdr__) + len(self.bmp):]

    class RTS(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6)
        )

    class CTS(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
        )

    class ACK(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
        )

    class CFEnd(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
        )

    class MGMT_Frame(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
            ('bssid', '6s', '\x00' * 6),
            ('frag_seq', 'H', 0)
        )

    class Beacon(dpkt.Packet):
        __hdr__ = (
            ('timestamp', 'Q', 0),
            ('interval', 'H', 0),
            ('capability', 'H', 0)
        )

    class Disassoc(dpkt.Packet):
        __hdr__ = (
            ('reason', 'H', 0),
        )

    class Assoc_Req(dpkt.Packet):
        __hdr__ = (
            ('capability', 'H', 0),
            ('interval', 'H', 0)
        )

    class Assoc_Resp(dpkt.Packet):
        __hdr__ = (
            ('capability', 'H', 0),
            ('status', 'H', 0),
            ('aid', 'H', 0)
        )

    class Reassoc_Req(dpkt.Packet):
        __hdr__ = (
            ('capability', 'H', 0),
            ('interval', 'H', 0),
            ('current_ap', '6s', '\x00' * 6)
        )

    # This obviously doesn't support any of AUTH frames that use encryption
    class Auth(dpkt.Packet):
        __hdr__ = (
            ('algorithm', 'H', 0),
            ('auth_seq', 'H', 0),
        )

    class Deauth(dpkt.Packet):
        __hdr__ = (
            ('reason', 'H', 0),
        )

    class Action(dpkt.Packet):
        __hdr__ = (
            ('category', 'B', 0),
            ('code', 'B', 0),
        )

        def unpack(self, buf):
            dpkt.Packet.unpack(self, buf)

            action_parser = {
                BLOCK_ACK: {
                    BLOCK_ACK_CODE_REQUEST: ('block_ack_request', IEEE80211.BlockAckActionRequest),
                    BLOCK_ACK_CODE_RESPONSE: ('block_ack_response', IEEE80211.BlockAckActionResponse),
                    BLOCK_ACK_CODE_DELBA: ('block_ack_delba', IEEE80211.BlockAckActionDelba),
                },
            }

            try:
                decoder = action_parser[self.category][self.code][1]
                field_name = action_parser[self.category][self.code][0]
            except KeyError:
                raise dpkt.UnpackError("KeyError: category=%s code=%s" % (self.category, self.code))

            field = decoder(self.data)
            setattr(self, field_name, field)
            self.data = field.data

    class BlockAckActionRequest(dpkt.Packet):
        __hdr__ = (
            ('dialog', 'B', 0),
            ('parameters', 'H', 0),
            ('timeout', 'H', 0),
            ('starting_seq', 'H', 0),
        )

    class BlockAckActionResponse(dpkt.Packet):
        __hdr__ = (
            ('dialog', 'B', 0),
            ('status_code', 'H', 0),
            ('parameters', 'H', 0),
            ('timeout', 'H', 0),
        )

    class BlockAckActionDelba(dpkt.Packet):
        __byte_order__ = '<'
        __hdr__ = (
            ('delba_param_set', 'H', 0),
            ('reason_code', 'H', 0),
            # ('gcr_group_addr', '8s', '\x00' * 8), # Standard says it must be there, but it isn't?
        )

    class Data(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
            ('bssid', '6s', '\x00' * 6),
            ('frag_seq', 'H', 0)
        )

    class DataFromDS(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('bssid', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
            ('frag_seq', 'H', 0)
        )

    class DataToDS(dpkt.Packet):
        __hdr__ = (
            ('bssid', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
            ('dst', '6s', '\x00' * 6),
            ('frag_seq', 'H', 0)
        )

    class DataInterDS(dpkt.Packet):
        __hdr__ = (
            ('dst', '6s', '\x00' * 6),
            ('src', '6s', '\x00' * 6),
            ('da', '6s', '\x00' * 6),
            ('frag_seq', 'H', 0),
            ('sa', '6s', '\x00' * 6)
        )

    class QoS_Data(dpkt.Packet):
        __hdr__ = (
            ('control', 'H', 0),
        )

    class IE(dpkt.Packet):
        __hdr__ = (
            ('id', 'B', 0),
            ('len', 'B', 0)
        )

        def unpack(self, buf):
            dpkt.Packet.unpack(self, buf)
            self.info = buf[2:self.len + 2]

    class FH(dpkt.Packet):
        __hdr__ = (
            ('id', 'B', 0),
            ('len', 'B', 0),
            ('tu', 'H', 0),
            ('hopset', 'B', 0),
            ('hoppattern', 'B', 0),
            ('hopindex', 'B', 0)
        )

    class DS(dpkt.Packet):
        __hdr__ = (
            ('id', 'B', 0),
            ('len', 'B', 0),
            ('ch', 'B', 0)
        )

    class CF(dpkt.Packet):
        __hdr__ = (
            ('id', 'B', 0),
            ('len', 'B', 0),
            ('count', 'B', 0),
            ('period', 'B', 0),
            ('max', 'H', 0),
            ('dur', 'H', 0)
        )

    class TIM(dpkt.Packet):
        __hdr__ = (
            ('id', 'B', 0),
            ('len', 'B', 0),
            ('count', 'B', 0),
            ('period', 'B', 0),
            ('ctrl', 'H', 0)
        )

        def unpack(self, buf):
            dpkt.Packet.unpack(self, buf)
            self.bitmap = buf[5:self.len + 2]

    class IBSS(dpkt.Packet):
        __hdr__ = (
            ('id', 'B', 0),
            ('len', 'B', 0),
            ('atim', 'H', 0)
        )


def test_802211_ack():
    s = b'\xd4\x00\x00\x00\x00\x12\xf0\xb6\x1c\xa4\xff\xff\xff\xff'
    ieee = IEEE80211(s, fcs=True)
    assert ieee.version == 0
    assert ieee.type == CTL_TYPE
    assert ieee.subtype == C_ACK
    assert ieee.to_ds == 0
    assert ieee.from_ds == 0
    assert ieee.pwr_mgt == 0
    assert ieee.more_data == 0
    assert ieee.wep == 0
    assert ieee.order == 0
    assert ieee.ack.dst == b'\x00\x12\xf0\xb6\x1c\xa4'
    fcs = struct.unpack('<I', s[-4:])[0]
    assert ieee.fcs == fcs


def test_80211_beacon():
    s = (
        b'\x80\x00\x00\x00\xff\xff\xff\xff\xff\xff\x00\x26\xcb\x18\x6a\x30\x00\x26\xcb\x18\x6a\x30'
        b'\xa0\xd0\x77\x09\x32\x03\x8f\x00\x00\x00\x66\x00\x31\x04\x00\x04\x43\x41\x45\x4e\x01\x08'
        b'\x82\x84\x8b\x0c\x12\x96\x18\x24\x03\x01\x01\x05\x04\x00\x01\x00\x00\x07\x06\x55\x53\x20'
        b'\x01\x0b\x1a\x0b\x05\x00\x00\x6e\x00\x00\x2a\x01\x02\x2d\x1a\x6e\x18\x1b\xff\xff\x00\x00'
        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x30\x14\x01'
        b'\x00\x00\x0f\xac\x04\x01\x00\x00\x0f\xac\x04\x01\x00\x00\x0f\xac\x01\x28\x00\x32\x04\x30'
        b'\x48\x60\x6c\x36\x03\x51\x63\x03\x3d\x16\x01\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00'
        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x85\x1e\x05\x00\x8f\x00\x0f\x00\xff\x03\x59\x00'
        b'\x63\x73\x65\x2d\x33\x39\x31\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x36\x96\x06'
        b'\x00\x40\x96\x00\x14\x00\xdd\x18\x00\x50\xf2\x02\x01\x01\x80\x00\x03\xa4\x00\x00\x27\xa4'
        b'\x00\x00\x42\x43\x5e\x00\x62\x32\x2f\x00\xdd\x06\x00\x40\x96\x01\x01\x04\xdd\x05\x00\x40'
        b'\x96\x03\x05\xdd\x05\x00\x40\x96\x0b\x09\xdd\x08\x00\x40\x96\x13\x01\x00\x34\x01\xdd\x05'
        b'\x00\x40\x96\x14\x05'
    )
    ieee = IEEE80211(s, fcs=True)
    assert ieee.version == 0
    assert ieee.type == MGMT_TYPE
    assert ieee.subtype == M_BEACON
    assert ieee.to_ds == 0
    assert ieee.from_ds == 0
    assert ieee.pwr_mgt == 0
    assert ieee.more_data == 0
    assert ieee.wep == 0
    assert ieee.order == 0
    assert ieee.mgmt.dst == b'\xff\xff\xff\xff\xff\xff'
    assert ieee.mgmt.src == b'\x00\x26\xcb\x18\x6a\x30'
    assert ieee.beacon.capability == 0x3104
    assert ieee.capability.privacy == 1
    assert ieee.ssid.data == b'CAEN'
    assert ieee.rate.data == b'\x82\x84\x8b\x0c\x12\x96\x18\x24'
    assert ieee.ds.data == b'\x01'
    assert ieee.tim.data == b'\x00\x01\x00\x00'
    fcs = struct.unpack('<I', s[-4:])[0]
    assert ieee.fcs == fcs


def test_80211_data():
    s = (
        b'\x08\x09\x20\x00\x00\x26\xcb\x17\x3d\x91\x00\x16\x44\xb0\xae\xc6\x00\x02\xb3\xd6\x26\x3c'
        b'\x80\x7e\xaa\xaa\x03\x00\x00\x00\x08\x00\x45\x00\x00\x28\x07\x27\x40\x00\x80\x06\x1d\x39'
        b'\x8d\xd4\x37\x3d\x3f\xf5\xd1\x69\xc0\x5f\x01\xbb\xb2\xd6\xef\x23\x38\x2b\x4f\x08\x50\x10'
        b'\x42\x04\xac\x17\x00\x00'
    )
    ieee = IEEE80211(s, fcs=True)
    assert ieee.type == DATA_TYPE
    assert ieee.subtype == D_DATA
    assert ieee.data_frame.dst == b'\x00\x02\xb3\xd6\x26\x3c'
    assert ieee.data_frame.src == b'\x00\x16\x44\xb0\xae\xc6'
    assert ieee.data_frame.frag_seq == 0x807e
    assert ieee.data == (b'\xaa\xaa\x03\x00\x00\x00\x08\x00\x45\x00\x00\x28\x07\x27\x40\x00\x80\x06'
                         b'\x1d\x39\x8d\xd4\x37\x3d\x3f\xf5\xd1\x69\xc0\x5f\x01\xbb\xb2\xd6\xef\x23'
                         b'\x38\x2b\x4f\x08\x50\x10\x42\x04')
    assert ieee.fcs == struct.unpack('<I', b'\xac\x17\x00\x00')[0]

    from . import llc
    llc_pkt = llc.LLC(ieee.data_frame.data)
    ip_pkt = llc_pkt.data
    assert ip_pkt.dst == b'\x3f\xf5\xd1\x69'


def test_80211_data_qos():
    s = (
        b'\x88\x01\x3a\x01\x00\x26\xcb\x17\x44\xf0\x00\x23\xdf\xc9\xc0\x93\x00\x26\xcb\x17\x44\xf0'
        b'\x20\x7b\x00\x00\xaa\xaa\x03\x00\x00\x00\x88\x8e\x01\x00\x00\x74\x02\x02\x00\x74\x19\x80'
        b'\x00\x00\x00\x6a\x16\x03\x01\x00\x65\x01\x00\x00\x61\x03\x01\x4b\x4c\xa7\x7e\x27\x61\x6f'
        b'\x02\x7b\x3c\x72\x39\xe3\x7b\xd7\x43\x59\x91\x7f\xaa\x22\x47\x51\xb6\x88\x9f\x85\x90\x87'
        b'\x5a\xd1\x13\x20\xe0\x07\x00\x00\x68\xbd\xa4\x13\xb0\xd5\x82\x7e\xc7\xfb\xe7\xcc\xab\x6e'
        b'\x5d\x5a\x51\x50\xd4\x45\xc5\xa1\x65\x53\xad\xb5\x88\x5b\x00\x1a\x00\x2f\x00\x05\x00\x04'
        b'\x00\x35\x00\x0a\x00\x09\x00\x03\x00\x08\x00\x33\x00\x39\x00\x16\x00\x15\x00\x14\x01\x00'
        b'\xff\xff\xff\xff'
    )
    ieee = IEEE80211(s, fcs=True)
    assert ieee.type == DATA_TYPE
    assert ieee.subtype == D_QOS_DATA
    assert ieee.data_frame.dst == b'\x00\x26\xcb\x17\x44\xf0'
    assert ieee.data_frame.src == b'\x00\x23\xdf\xc9\xc0\x93'
    assert ieee.data_frame.frag_seq == 0x207b
    assert ieee.data == (b'\xaa\xaa\x03\x00\x00\x00\x88\x8e\x01\x00\x00\x74\x02\x02\x00\x74\x19\x80'
                         b'\x00\x00\x00\x6a\x16\x03\x01\x00\x65\x01\x00\x00\x61\x03\x01\x4b\x4c\xa7'
                         b'\x7e\x27\x61\x6f\x02\x7b\x3c\x72\x39\xe3\x7b\xd7\x43\x59\x91\x7f\xaa\x22'
                         b'\x47\x51\xb6\x88\x9f\x85\x90\x87\x5a\xd1\x13\x20\xe0\x07\x00\x00\x68\xbd'
                         b'\xa4\x13\xb0\xd5\x82\x7e\xc7\xfb\xe7\xcc\xab\x6e\x5d\x5a\x51\x50\xd4\x45'
                         b'\xc5\xa1\x65\x53\xad\xb5\x88\x5b\x00\x1a\x00\x2f\x00\x05\x00\x04\x00\x35'
                         b'\x00\x0a\x00\x09\x00\x03\x00\x08\x00\x33\x00\x39\x00\x16\x00\x15\x00\x14\x01\x00')
    assert ieee.qos_data.control == 0x0
    assert ieee.fcs == struct.unpack('<I', b'\xff\xff\xff\xff')[0]


def test_bug():
    s = (b'\x88\x41\x2c\x00\x00\x26\xcb\x17\x44\xf0\x00\x1e\x52\x97\x14\x11\x00\x1f\x6d\xe8\x18\x00'
         b'\xd0\x07\x00\x00\x6f\x00\x00\x20\x00\x00\x00\x00')
    ieee = IEEE80211(s)
    assert ieee.wep == 1


def test_data_ds():
    # verifying the ToDS and FromDS fields and that we're getting the
    # correct values

    s = (b'\x08\x03\x00\x00\x01\x0b\x85\x00\x00\x00\x00\x26\xcb\x18\x73\x50\x01\x0b\x85\x00\x00\x00'
         b'\x00\x89\x00\x26\xcb\x18\x73\x50')
    ieee = IEEE80211(s)
    assert ieee.type == DATA_TYPE
    assert ieee.to_ds == 1
    assert ieee.from_ds == 1
    assert ieee.data_frame.sa == b'\x00\x26\xcb\x18\x73\x50'
    assert ieee.data_frame.src == b'\x00\x26\xcb\x18\x73\x50'
    assert ieee.data_frame.dst == b'\x01\x0b\x85\x00\x00\x00'
    assert ieee.data_frame.da == b'\x01\x0b\x85\x00\x00\x00'

    s = (b'\x88\x41\x50\x01\x00\x26\xcb\x17\x48\xc1\x00\x24\x2c\xe7\xfe\x8a\xff\xff\xff\xff\xff\xff'
         b'\x80\xa0\x00\x00\x09\x1a\x00\x20\x00\x00\x00\x00')
    ieee = IEEE80211(s)
    assert ieee.type == DATA_TYPE
    assert ieee.to_ds == 1
    assert ieee.from_ds == 0
    assert ieee.data_frame.bssid == b'\x00\x26\xcb\x17\x48\xc1'
    assert ieee.data_frame.src == b'\x00\x24\x2c\xe7\xfe\x8a'
    assert ieee.data_frame.dst == b'\xff\xff\xff\xff\xff\xff'

    s = b'\x08\x02\x02\x01\x00\x02\x44\xac\x27\x70\x00\x1f\x33\x39\x75\x44\x00\x1f\x33\x39\x75\x44\x90\xa4'
    ieee = IEEE80211(s)
    assert ieee.type == DATA_TYPE
    assert ieee.to_ds == 0
    assert ieee.from_ds == 1
    assert ieee.data_frame.bssid == b'\x00\x1f\x33\x39\x75\x44'
    assert ieee.data_frame.src == b'\x00\x1f\x33\x39\x75\x44'
    assert ieee.data_frame.dst == b'\x00\x02\x44\xac\x27\x70'


def test_compressed_block_ack():
    s = (b'\x94\x00\x00\x00\x34\xc0\x59\xd6\x3f\x62\xb4\x75\x0e\x46\x83\xc1\x05\x50\x80\xee\x03\x00'
         b'\x00\x00\x00\x00\x00\x00\xa2\xe4\x98\x45')
    ieee = IEEE80211(s, fcs=True)
    assert ieee.type == CTL_TYPE
    assert ieee.subtype == C_BLOCK_ACK
    assert ieee.back.dst == b'\x34\xc0\x59\xd6\x3f\x62'
    assert ieee.back.src == b'\xb4\x75\x0e\x46\x83\xc1'
    assert ieee.back.compressed == 1
    assert len(ieee.back.bmp) == 8
    assert ieee.back.ack_policy == 1
    assert ieee.back.tid == 5


def test_action_block_ack_request():
    s = (b'\xd0\x00\x3a\x01\x00\x23\x14\x36\x52\x30\xb4\x75\x0e\x46\x83\xc1\xb4\x75\x0e\x46\x83\xc1'
         b'\x70\x14\x03\x00\x0d\x02\x10\x00\x00\x40\x29\x06\x50\x33\x9e')
    ieee = IEEE80211(s, fcs=True)
    assert ieee.type == MGMT_TYPE
    assert ieee.subtype == M_ACTION
    assert ieee.action.category == BLOCK_ACK
    assert ieee.action.code == BLOCK_ACK_CODE_REQUEST
    assert ieee.action.block_ack_request.timeout == 0
    parameters = struct.unpack('<H', b'\x10\x02')[0]
    assert ieee.action.block_ack_request.parameters == parameters


def test_action_block_ack_response():
    s = (b'\xd0\x00\x3c\x00\xb4\x75\x0e\x46\x83\xc1\x00\x23\x14\x36\x52\x30\xb4\x75\x0e\x46\x83\xc1'
         b'\xd0\x68\x03\x01\x0d\x00\x00\x02\x10\x88\x13\x9f\xc0\x0b\x75')
    ieee = IEEE80211(s, fcs=True)
    assert ieee.type == MGMT_TYPE
    assert ieee.subtype == M_ACTION
    assert ieee.action.category == BLOCK_ACK
    assert ieee.action.code == BLOCK_ACK_CODE_RESPONSE
    timeout = struct.unpack('<H', b'\x13\x88')[0]
    assert ieee.action.block_ack_response.timeout == timeout
    parameters = struct.unpack('<H', b'\x10\x02')[0]
    assert ieee.action.block_ack_response.parameters == parameters


def test_action_block_ack_delete():
    s = (b'\xd0\x00\x2c\x00\x00\xc1\x41\x06\x13\x0d\x6c\xb2\xae\xae\xde\x80\x6c\xb2\xae\xae\xde\x80'
         b'\xa0\x52\x03\x02\x00\x08\x01\x00\x74\x5d\x0a\xc6')
    ieee = IEEE80211(s, fcs=True)
    assert ieee.type == MGMT_TYPE
    assert ieee.subtype == M_ACTION
    assert ieee.action.category == BLOCK_ACK
    assert ieee.action.code == BLOCK_ACK_CODE_DELBA
    assert ieee.action.block_ack_delba.delba_param_set == 0x0800
    assert ieee.action.block_ack_delba.reason_code == 1


def test_ieee80211_properties():
    ieee80211 = IEEE80211()
    assert ieee80211.version == 0
    ieee80211.version = 1
    assert ieee80211.version == 1

    assert ieee80211.type == 0
    ieee80211.type = 1
    assert ieee80211.type == 1

    assert ieee80211.subtype == 0
    ieee80211.subtype = 1
    assert ieee80211.subtype == 1

    assert ieee80211.to_ds == 0
    ieee80211.to_ds = 1
    assert ieee80211.to_ds == 1

    assert ieee80211.from_ds == 0
    ieee80211.from_ds = 1
    assert ieee80211.from_ds == 1

    assert ieee80211.more_frag == 0
    ieee80211.more_frag = 1
    assert ieee80211.more_frag == 1

    assert ieee80211.retry == 0
    ieee80211.retry = 0
    assert ieee80211.retry == 0

    assert ieee80211.pwr_mgt == 0
    ieee80211.pwr_mgt = 0
    assert ieee80211.pwr_mgt == 0

    assert ieee80211.more_data == 0
    ieee80211.more_data = 0
    assert ieee80211.more_data == 0

    assert ieee80211.wep == 0
    ieee80211.wep = 1
    assert ieee80211.wep == 1

    assert ieee80211.order == 0
    ieee80211.order = 1
    assert ieee80211.order == 1


def test_blockack_properties():
    blockack = IEEE80211.BlockAck()
    assert blockack.compressed == 0
    blockack.compressed = 1
    assert blockack.compressed == 1

    assert blockack.ack_policy == 0
    blockack.ack_policy = 1
    assert blockack.ack_policy == 1

    assert blockack.multi_tid == 0
    blockack.multi_tid = 1
    assert blockack.multi_tid == 1

    assert blockack.tid == 0
    blockack.tid = 1
    assert blockack.tid == 1


def test_ieee80211_unpack():
    import pytest
    from binascii import unhexlify

    buf = unhexlify(
        '4000'  # subtype set to M_PROBE_REQ
        '0000'

        # MGMT_Frame
        '000000000000'  # dst
        '000000000000'  # src
        '000000000000'  # bssid
        '0000'          # frag_seq
    )
    ieee80211 = IEEE80211(buf)
    assert ieee80211.ies == []

    buf = unhexlify(
        '9000'  # subtype set to M_ATIM
        '0000'

        # MGMT_Frame
        '000000000000'  # dst
        '000000000000'  # src
        '000000000000'  # bssid
        '0000'          # frag_seq
    )
    ieee80211 = IEEE80211(buf)
    assert not hasattr(ieee80211, 'ies')

    buf = unhexlify(
        '0c00'  # type set to invalid value
        '0000'
    )
    with pytest.raises(dpkt.UnpackError, match="KeyError: type=3 subtype=0"):
        IEEE80211(buf)


def test_blockack_unpack():
    from binascii import unhexlify
    # unpack a non-compressed BlockAck
    buf = unhexlify(
        '000000000000'
        '000000000000'
        '0000'   # compressed flag not set
        '0000'
    ) + b'\xff' * 128

    blockack = IEEE80211.BlockAck(buf)
    assert blockack.bmp == b'\xff' * 128
    assert blockack.data == b''


def test_action_unpack():
    import pytest
    from binascii import unhexlify
    buf = unhexlify(
        '01'  # category
        '00'  # code (non-existent)
    )
    with pytest.raises(dpkt.UnpackError, match="KeyError: category=1 code=0"):
        IEEE80211.Action(buf)