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      1 # This file is part of Scapy
      2 # Scapy is free software: you can redistribute it and/or modify
      3 # it under the terms of the GNU General Public License as published by
      4 # the Free Software Foundation, either version 2 of the License, or
      5 # any later version.
      6 #
      7 # Scapy is distributed in the hope that it will be useful,
      8 # but WITHOUT ANY WARRANTY; without even the implied warranty of
      9 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
     10 # GNU General Public License for more details.
     11 #
     12 # You should have received a copy of the GNU General Public License
     13 # along with Scapy. If not, see <http://www.gnu.org/licenses/>.
     14 
     15 # author: <jellch (at] harris.com>
     16 
     17 # scapy.contrib.description = PPI CACE
     18 # scapy.contrib.status = loads
     19 
     20 """
     21 CACE PPI types 
     22 """
     23 import logging,struct
     24 from scapy.config import conf
     25 from scapy.packet import *
     26 from scapy.fields import *
     27 from scapy.layers.l2 import Ether
     28 from scapy.layers.dot11 import Dot11
     29 from scapy.contrib.ppi import *
     30 
     31 PPI_DOT11COMMON  = 2
     32 PPI_DOT11NMAC    = 3
     33 PPI_DOT11NMACPHY = 4
     34 PPI_SPECTRUMMAP  = 5
     35 PPI_PROCESSINFO  = 6
     36 PPI_CAPTUREINFO  = 7
     37 PPI_AGGREGATION  = 8
     38 PPI_DOT3         = 9
     39 
     40 # PPI 802.11 Common Field Header Fields
     41 class dBmByteField(Field):
     42     def __init__(self, name, default):
     43         Field.__init__(self, name, default, "b")
     44     def i2repr(self, pkt, val):
     45         if (val != None):
     46             val = "%4d dBm" % val
     47         return val
     48 
     49 class PPITSFTField(LELongField):
     50     def i2h(self, pkt, val):
     51         flags = 0
     52         if (pkt):
     53             flags = pkt.getfieldval("Pkt_Flags")
     54         if not flags:
     55             flags = 0
     56         if (flags & 0x02):
     57             scale = 1e-3
     58         else:
     59             scale = 1e-6
     60         tout = scale * float(val)
     61         return tout
     62     def h2i(self, pkt, val):
     63         scale = 1e6
     64         if pkt:
     65             flags = pkt.getfieldval("Pkt_Flags")
     66             if flags:
     67                 if (flags & 0x02):
     68                     scale = 1e3
     69         tout = int((scale * val) + 0.5)
     70         return tout
     71 
     72 _PPIDot11CommonChFlags = ['','','','','Turbo','CCK','OFDM','2GHz','5GHz',
     73                           'PassiveOnly','Dynamic CCK-OFDM','GSFK']
     74 
     75 _PPIDot11CommonPktFlags = ['FCS','TSFT_ms','FCS_Invalid','PHY_Error']
     76 
     77 # PPI 802.11 Common Field Header
     78 class Dot11Common(Packet):
     79     name = "PPI 802.11-Common"
     80     fields_desc = [ LEShortField('pfh_type',PPI_DOT11COMMON),
     81                     LEShortField('pfh_length', 20),
     82                     PPITSFTField('TSF_Timer', 0),
     83                     FlagsField('Pkt_Flags',0, -16, _PPIDot11CommonPktFlags),
     84                     LEShortField('Rate',0),
     85                     LEShortField('Ch_Freq',0),
     86                     FlagsField('Ch_Flags', 0, -16, _PPIDot11CommonChFlags),
     87                     ByteField('FHSS_Hop',0),
     88                     ByteField('FHSS_Pat',0),
     89                     dBmByteField('Antsignal',-128),
     90                     dBmByteField('Antnoise',-128)]
     91 
     92     def extract_padding(self, p):
     93         return b"",p
     94 #Hopefully other CACE defined types will be added here.
     95 
     96 #Add the dot11common layer to the PPI array
     97 addPPIType(PPI_DOT11COMMON, Dot11Common)
     98 
     99