This file is indexed.

/usr/share/pyshared/scapy/layers/dot11.py is in python-scapy 2.2.0-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
## This file is part of Scapy
## See http://www.secdev.org/projects/scapy for more informations
## Copyright (C) Philippe Biondi <phil@secdev.org>
## This program is published under a GPLv2 license

"""
Wireless LAN according to IEEE 802.11.
"""

import re,struct

from scapy.packet import *
from scapy.fields import *
from scapy.plist import PacketList
from scapy.layers.l2 import *


try:
    from Crypto.Cipher import ARC4
except ImportError:
    log_loading.info("Can't import python Crypto lib. Won't be able to decrypt WEP.")


### Fields

class Dot11AddrMACField(MACField):
    def is_applicable(self, pkt):
        return 1
    def addfield(self, pkt, s, val):
        if self.is_applicable(pkt):
            return MACField.addfield(self, pkt, s, val)
        else:
            return s        
    def getfield(self, pkt, s):
        if self.is_applicable(pkt):
            return MACField.getfield(self, pkt, s)
        else:
            return s,None

class Dot11Addr2MACField(Dot11AddrMACField):
    def is_applicable(self, pkt):
        if pkt.type == 1:
            return pkt.subtype in [ 0xb, 0xa, 0xe, 0xf] # RTS, PS-Poll, CF-End, CF-End+CF-Ack
        return 1

class Dot11Addr3MACField(Dot11AddrMACField):
    def is_applicable(self, pkt):
        if pkt.type in [0,2]:
            return 1
        return 0

class Dot11Addr4MACField(Dot11AddrMACField):
    def is_applicable(self, pkt):
        if pkt.type == 2:
            if pkt.FCfield & 0x3 == 0x3: # To-DS and From-DS are set
                return 1
        return 0
    

### Layers


class PrismHeader(Packet):
    """ iwpriv wlan0 monitor 3 """
    name = "Prism header"
    fields_desc = [ LEIntField("msgcode",68),
                    LEIntField("len",144),
                    StrFixedLenField("dev","",16),
                    LEIntField("hosttime_did",0),
                  LEShortField("hosttime_status",0),
                  LEShortField("hosttime_len",0),
                    LEIntField("hosttime",0),
                    LEIntField("mactime_did",0),
                  LEShortField("mactime_status",0),
                  LEShortField("mactime_len",0),
                    LEIntField("mactime",0),
                    LEIntField("channel_did",0),
                  LEShortField("channel_status",0),
                  LEShortField("channel_len",0),
                    LEIntField("channel",0),
                    LEIntField("rssi_did",0),
                  LEShortField("rssi_status",0),
                  LEShortField("rssi_len",0),
                    LEIntField("rssi",0),
                    LEIntField("sq_did",0),
                  LEShortField("sq_status",0),
                  LEShortField("sq_len",0),
                    LEIntField("sq",0),
                    LEIntField("signal_did",0),
                  LEShortField("signal_status",0),
                  LEShortField("signal_len",0),
              LESignedIntField("signal",0),
                    LEIntField("noise_did",0),
                  LEShortField("noise_status",0),
                  LEShortField("noise_len",0),
                    LEIntField("noise",0),
                    LEIntField("rate_did",0),
                  LEShortField("rate_status",0),
                  LEShortField("rate_len",0),
                    LEIntField("rate",0),
                    LEIntField("istx_did",0),
                  LEShortField("istx_status",0),
                  LEShortField("istx_len",0),
                    LEIntField("istx",0),
                    LEIntField("frmlen_did",0),
                  LEShortField("frmlen_status",0),
                  LEShortField("frmlen_len",0),
                    LEIntField("frmlen",0),
                    ]
    def answers(self, other):
        if isinstance(other, PrismHeader):
            return self.payload.answers(other.payload)
        else:
            return self.payload.answers(other)

class RadioTap(Packet):
    name = "RadioTap dummy"
    fields_desc = [ ByteField('version', 0),
                    ByteField('pad', 0),
                    FieldLenField('len', None, 'notdecoded', '<H', adjust=lambda pkt,x:x+8),
                    FlagsField('present', None, -32, ['TSFT','Flags','Rate','Channel','FHSS','dBm_AntSignal',
                                                     'dBm_AntNoise','Lock_Quality','TX_Attenuation','dB_TX_Attenuation',
                                                      'dBm_TX_Power', 'Antenna', 'dB_AntSignal', 'dB_AntNoise',
                                                     'b14', 'b15','b16','b17','b18','b19','b20','b21','b22','b23',
                                                     'b24','b25','b26','b27','b28','b29','b30','Ext']),
                    StrLenField('notdecoded', "", length_from= lambda pkt:pkt.len-8) ]

class PPI(Packet):
    name = "Per-Packet Information header (partial)"
    fields_desc = [ ByteField("version", 0),
                    ByteField("flags", 0),
                    FieldLenField("len", None, fmt="<H", length_of="fields", adjust=lambda pkt,x:x+8),
                    LEIntField("dlt", 0),
                    StrLenField("notdecoded", "", length_from = lambda pkt:pkt.len-8)
                    ]



class Dot11SCField(LEShortField):
    def is_applicable(self, pkt):
        return pkt.type != 1 # control frame
    def addfield(self, pkt, s, val):
        if self.is_applicable(pkt):
            return LEShortField.addfield(self, pkt, s, val)
        else:
            return s
    def getfield(self, pkt, s):
        if self.is_applicable(pkt):
            return LEShortField.getfield(self, pkt, s)
        else:
            return s,None

class Dot11(Packet):
    name = "802.11"
    fields_desc = [
                    BitField("subtype", 0, 4),
                    BitEnumField("type", 0, 2, ["Management", "Control", "Data", "Reserved"]),
                    BitField("proto", 0, 2),
                    FlagsField("FCfield", 0, 8, ["to-DS", "from-DS", "MF", "retry", "pw-mgt", "MD", "wep", "order"]),
                    ShortField("ID",0),
                    MACField("addr1", ETHER_ANY),
                    Dot11Addr2MACField("addr2", ETHER_ANY),
                    Dot11Addr3MACField("addr3", ETHER_ANY),
                    Dot11SCField("SC", 0),
                    Dot11Addr4MACField("addr4", ETHER_ANY) 
                    ]
    def mysummary(self):
        return self.sprintf("802.11 %Dot11.type% %Dot11.subtype% %Dot11.addr2% > %Dot11.addr1%")
    def guess_payload_class(self, payload):
        if self.type == 0x02 and (self.subtype >= 0x08 and self.subtype <=0xF and self.subtype != 0xD):
            return Dot11QoS
	elif self.FCfield & 0x40:
            return Dot11WEP
        else:
            return Packet.guess_payload_class(self, payload)
    def answers(self, other):
        if isinstance(other,Dot11):
            if self.type == 0: # management
                if self.addr1.lower() != other.addr2.lower(): # check resp DA w/ req SA
                    return 0
                if (other.subtype,self.subtype) in [(0,1),(2,3),(4,5)]:
                    return 1
                if self.subtype == other.subtype == 11: # auth
                    return self.payload.answers(other.payload)
            elif self.type == 1: # control
                return 0
            elif self.type == 2: # data
                return self.payload.answers(other.payload)
            elif self.type == 3: # reserved
                return 0
        return 0
    def unwep(self, key=None, warn=1):
        if self.FCfield & 0x40 == 0:
            if warn:
                warning("No WEP to remove")
            return
        if  isinstance(self.payload.payload, NoPayload):
            if key or conf.wepkey:
                self.payload.decrypt(key)
            if isinstance(self.payload.payload, NoPayload):
                if warn:
                    warning("Dot11 can't be decrypted. Check conf.wepkey.")
                return
        self.FCfield &= ~0x40
        self.payload=self.payload.payload


class Dot11QoS(Packet):
    name = "802.11 QoS"
    fields_desc = [ BitField("TID",None,4),
                    BitField("EOSP",None,1),
                    BitField("Ack Policy",None,2),
                    BitField("Reserved",None,1),
                    ByteField("TXOP",None) ]
    def guess_payload_class(self, payload):
        if isinstance(self.underlayer, Dot11):
            if self.underlayer.FCfield & 0x40:
                return Dot11WEP
        return Packet.guess_payload_class(self, payload)


capability_list = [ "res8", "res9", "short-slot", "res11",
                    "res12", "DSSS-OFDM", "res14", "res15",
                   "ESS", "IBSS", "CFP", "CFP-req",
                   "privacy", "short-preamble", "PBCC", "agility"]

reason_code = {0:"reserved",1:"unspec", 2:"auth-expired",
               3:"deauth-ST-leaving",
               4:"inactivity", 5:"AP-full", 6:"class2-from-nonauth",
               7:"class3-from-nonass", 8:"disas-ST-leaving",
               9:"ST-not-auth"}

status_code = {0:"success", 1:"failure", 10:"cannot-support-all-cap",
               11:"inexist-asso", 12:"asso-denied", 13:"algo-unsupported",
               14:"bad-seq-num", 15:"challenge-failure",
               16:"timeout", 17:"AP-full",18:"rate-unsupported" }

class Dot11Beacon(Packet):
    name = "802.11 Beacon"
    fields_desc = [ LELongField("timestamp", 0),
                    LEShortField("beacon_interval", 0x0064),
                    FlagsField("cap", 0, 16, capability_list) ]
    

class Dot11Elt(Packet):
    name = "802.11 Information Element"
    fields_desc = [ ByteEnumField("ID", 0, {0:"SSID", 1:"Rates", 2: "FHset", 3:"DSset", 4:"CFset", 5:"TIM", 6:"IBSSset", 16:"challenge",
                                            42:"ERPinfo", 46:"QoS Capability", 47:"ERPinfo", 48:"RSNinfo", 50:"ESRates",221:"vendor",68:"reserved"}),
                    FieldLenField("len", None, "info", "B"),
                    StrLenField("info", "", length_from=lambda x:x.len) ]
    def mysummary(self):
        if self.ID == 0:
            return "SSID=%s"%repr(self.info),[Dot11]
        else:
            return ""

class Dot11ATIM(Packet):
    name = "802.11 ATIM"

class Dot11Disas(Packet):
    name = "802.11 Disassociation"
    fields_desc = [ LEShortEnumField("reason", 1, reason_code) ]

class Dot11AssoReq(Packet):
    name = "802.11 Association Request"
    fields_desc = [ FlagsField("cap", 0, 16, capability_list),
                    LEShortField("listen_interval", 0x00c8) ]


class Dot11AssoResp(Packet):
    name = "802.11 Association Response"
    fields_desc = [ FlagsField("cap", 0, 16, capability_list),
                    LEShortField("status", 0),
                    LEShortField("AID", 0) ]

class Dot11ReassoReq(Packet):
    name = "802.11 Reassociation Request"
    fields_desc = [ FlagsField("cap", 0, 16, capability_list),
                    LEShortField("listen_interval", 0x00c8),
                    MACField("current_AP", ETHER_ANY) ]


class Dot11ReassoResp(Dot11AssoResp):
    name = "802.11 Reassociation Response"

class Dot11ProbeReq(Packet):
    name = "802.11 Probe Request"
    
class Dot11ProbeResp(Packet):
    name = "802.11 Probe Response"
    fields_desc = [ LELongField("timestamp", 0),
                    LEShortField("beacon_interval", 0x0064),
                    FlagsField("cap", 0, 16, capability_list) ]
    
class Dot11Auth(Packet):
    name = "802.11 Authentication"
    fields_desc = [ LEShortEnumField("algo", 0, ["open", "sharedkey"]),
                    LEShortField("seqnum", 0),
                    LEShortEnumField("status", 0, status_code) ]
    def answers(self, other):
        if self.seqnum == other.seqnum+1:
            return 1
        return 0

class Dot11Deauth(Packet):
    name = "802.11 Deauthentication"
    fields_desc = [ LEShortEnumField("reason", 1, reason_code) ]



class Dot11WEP(Packet):
    name = "802.11 WEP packet"
    fields_desc = [ StrFixedLenField("iv", "\0\0\0", 3),
                    ByteField("keyid", 0),
                    StrField("wepdata",None,remain=4),
                    IntField("icv",None) ]

    def post_dissect(self, s):
#        self.icv, = struct.unpack("!I",self.wepdata[-4:])
#        self.wepdata = self.wepdata[:-4]
        self.decrypt()

    def build_payload(self):
        if self.wepdata is None:
            return Packet.build_payload(self)
        return ""

    def post_build(self, p, pay):
        if self.wepdata is None:
            key = conf.wepkey
            if key:
                if self.icv is None:
                    pay += struct.pack("<I",crc32(pay))
                    icv = ""
                else:
                    icv = p[4:8]
                c = ARC4.new(self.iv+key)
                p = p[:4]+c.encrypt(pay)+icv
            else:
                warning("No WEP key set (conf.wepkey).. strange results expected..")
        return p
            

    def decrypt(self,key=None):
        if key is None:
            key = conf.wepkey
        if key:
            c = ARC4.new(self.iv+key)
            self.add_payload(LLC(c.decrypt(self.wepdata)))
                    

bind_layers( PrismHeader,   Dot11,         )
bind_layers( RadioTap,      Dot11,         )
bind_layers( PPI,           Dot11,         dlt=105)
bind_layers( Dot11,         LLC,           type=2)
bind_layers( Dot11QoS,      LLC,           )
bind_layers( Dot11,         Dot11AssoReq,    subtype=0, type=0)
bind_layers( Dot11,         Dot11AssoResp,   subtype=1, type=0)
bind_layers( Dot11,         Dot11ReassoReq,  subtype=2, type=0)
bind_layers( Dot11,         Dot11ReassoResp, subtype=3, type=0)
bind_layers( Dot11,         Dot11ProbeReq,   subtype=4, type=0)
bind_layers( Dot11,         Dot11ProbeResp,  subtype=5, type=0)
bind_layers( Dot11,         Dot11Beacon,     subtype=8, type=0)
bind_layers( Dot11,         Dot11ATIM,       subtype=9, type=0)
bind_layers( Dot11,         Dot11Disas,      subtype=10, type=0)
bind_layers( Dot11,         Dot11Auth,       subtype=11, type=0)
bind_layers( Dot11,         Dot11Deauth,     subtype=12, type=0)
bind_layers( Dot11Beacon,     Dot11Elt,    )
bind_layers( Dot11AssoReq,    Dot11Elt,    )
bind_layers( Dot11AssoResp,   Dot11Elt,    )
bind_layers( Dot11ReassoReq,  Dot11Elt,    )
bind_layers( Dot11ReassoResp, Dot11Elt,    )
bind_layers( Dot11ProbeReq,   Dot11Elt,    )
bind_layers( Dot11ProbeResp,  Dot11Elt,    )
bind_layers( Dot11Auth,       Dot11Elt,    )
bind_layers( Dot11Elt,        Dot11Elt,    )


conf.l2types.register(105, Dot11)
conf.l2types.register_num2layer(801, Dot11)
conf.l2types.register(119, PrismHeader)
conf.l2types.register_num2layer(802, PrismHeader)
conf.l2types.register(127, RadioTap)
conf.l2types.register(0xc0, PPI)
conf.l2types.register_num2layer(803, RadioTap)


class WiFi_am(AnsweringMachine):
    """Before using this, initialize "iffrom" and "ifto" interfaces:
iwconfig iffrom mode monitor
iwpriv orig_ifto hostapd 1
ifconfig ifto up
note: if ifto=wlan0ap then orig_ifto=wlan0
note: ifto and iffrom must be set on the same channel
ex:
ifconfig eth1 up
iwconfig eth1 mode monitor
iwconfig eth1 channel 11
iwpriv wlan0 hostapd 1
ifconfig wlan0ap up
iwconfig wlan0 channel 11
iwconfig wlan0 essid dontexist
iwconfig wlan0 mode managed
"""
    function_name = "airpwn"
    filter = None
    
    def parse_options(self, iffrom, ifto, replace, pattern="", ignorepattern=""):
        self.iffrom = iffrom
        self.ifto = ifto
        ptrn = re.compile(pattern)
        iptrn = re.compile(ignorepattern)
        
    def is_request(self, pkt):
        if not isinstance(pkt,Dot11):
            return 0
        if not pkt.FCfield & 1:
            return 0
        if not pkt.haslayer(TCP):
            return 0
        ip = pkt.getlayer(IP)
        tcp = pkt.getlayer(TCP)
        pay = str(tcp.payload)
        if not self.ptrn.match(pay):
            return 0
        if self.iptrn.match(pay):
            return 0

    def make_reply(self, p):
        ip = p.getlayer(IP)
        tcp = p.getlayer(TCP)
        pay = str(tcp.payload)
        del(p.payload.payload.payload)
        p.FCfield="from-DS"
        p.addr1,p.addr2 = p.addr2,p.addr1
        p /= IP(src=ip.dst,dst=ip.src)
        p /= TCP(sport=tcp.dport, dport=tcp.sport,
                 seq=tcp.ack, ack=tcp.seq+len(pay),
                 flags="PA")
        q = p.copy()
        p /= self.replace
        q.ID += 1
        q.getlayer(TCP).flags="RA"
        q.getlayer(TCP).seq+=len(replace)
        return [p,q]
    
    def print_reply(self):
        print p.sprintf("Sent %IP.src%:%IP.sport% > %IP.dst%:%TCP.dport%")

    def send_reply(self, reply):
        sendp(reply, iface=self.ifto, **self.optsend)

    def sniff(self):
        sniff(iface=self.iffrom, **self.optsniff)



plst=[]
def get_toDS():
    global plst
    while 1:
        p,=sniff(iface="eth1",count=1)
        if not isinstance(p,Dot11):
            continue
        if p.FCfield & 1:
            plst.append(p)
            print "."


#    if not ifto.endswith("ap"):
#        print "iwpriv %s hostapd 1" % ifto
#        os.system("iwpriv %s hostapd 1" % ifto)
#        ifto += "ap"
#        
#    os.system("iwconfig %s mode monitor" % iffrom)
#    

def airpwn(iffrom, ifto, replace, pattern="", ignorepattern=""):
    """Before using this, initialize "iffrom" and "ifto" interfaces:
iwconfig iffrom mode monitor
iwpriv orig_ifto hostapd 1
ifconfig ifto up
note: if ifto=wlan0ap then orig_ifto=wlan0
note: ifto and iffrom must be set on the same channel
ex:
ifconfig eth1 up
iwconfig eth1 mode monitor
iwconfig eth1 channel 11
iwpriv wlan0 hostapd 1
ifconfig wlan0ap up
iwconfig wlan0 channel 11
iwconfig wlan0 essid dontexist
iwconfig wlan0 mode managed
"""
    
    ptrn = re.compile(pattern)
    iptrn = re.compile(ignorepattern)
    def do_airpwn(p, ifto=ifto, replace=replace, ptrn=ptrn, iptrn=iptrn):
        if not isinstance(p,Dot11):
            return
        if not p.FCfield & 1:
            return
        if not p.haslayer(TCP):
            return
        ip = p.getlayer(IP)
        tcp = p.getlayer(TCP)
        pay = str(tcp.payload)
#        print "got tcp"
        if not ptrn.match(pay):
            return
#        print "match 1"
        if iptrn.match(pay):
            return
#        print "match 2"
        del(p.payload.payload.payload)
        p.FCfield="from-DS"
        p.addr1,p.addr2 = p.addr2,p.addr1
        q = p.copy()
        p /= IP(src=ip.dst,dst=ip.src)
        p /= TCP(sport=tcp.dport, dport=tcp.sport,
                 seq=tcp.ack, ack=tcp.seq+len(pay),
                 flags="PA")
        q = p.copy()
        p /= replace
        q.ID += 1
        q.getlayer(TCP).flags="RA"
        q.getlayer(TCP).seq+=len(replace)
        
        sendp([p,q], iface=ifto, verbose=0)
#        print "send",repr(p)        
#        print "send",repr(q)
        print p.sprintf("Sent %IP.src%:%IP.sport% > %IP.dst%:%TCP.dport%")

    sniff(iface=iffrom,prn=do_airpwn)

            
        
conf.stats_dot11_protocols += [Dot11WEP, Dot11Beacon, ]


        


class Dot11PacketList(PacketList):
    def __init__(self, res=None, name="Dot11List", stats=None):
        if stats is None:
            stats = conf.stats_dot11_protocols

        PacketList.__init__(self, res, name, stats)
    def toEthernet(self):
        data = map(lambda x:x.getlayer(Dot11), filter(lambda x : x.haslayer(Dot11) and x.type == 2, self.res))
        r2 = []
        for p in data:
            q = p.copy()
            q.unwep()
            r2.append(Ether()/q.payload.payload.payload) #Dot11/LLC/SNAP/IP
        return PacketList(r2,name="Ether from %s"%self.listname)