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## 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
"""
Bluetooth layers, sockets and send/receive functions.
"""
import socket,struct
from scapy.config import conf
from scapy.packet import *
from scapy.fields import *
from scapy.supersocket import SuperSocket
from scapy.data import MTU
class HCI_Hdr(Packet):
name = "HCI header"
fields_desc = [ ByteEnumField("type",2,{1:"command",2:"ACLdata",3:"SCOdata",4:"event",5:"vendor"}),]
def mysummary(self):
return self.sprintf("HCI %type%")
class HCI_ACL_Hdr(Packet):
name = "HCI ACL header"
fields_desc = [ ByteField("handle",0), # Actually, handle is 12 bits and flags is 4.
ByteField("flags",0), # I wait to write a LEBitField
LEShortField("len",None), ]
def post_build(self, p, pay):
p += pay
if self.len is None:
l = len(p)-4
p = p[:2]+chr(l&0xff)+chr((l>>8)&0xff)+p[4:]
return p
class L2CAP_Hdr(Packet):
name = "L2CAP header"
fields_desc = [ LEShortField("len",None),
LEShortEnumField("cid",0,{1:"control"}),]
def post_build(self, p, pay):
p += pay
if self.len is None:
l = len(p)-4
p = p[:2]+chr(l&0xff)+chr((l>>8)&0xff)+p[4:]
return p
class L2CAP_CmdHdr(Packet):
name = "L2CAP command header"
fields_desc = [
ByteEnumField("code",8,{1:"rej",2:"conn_req",3:"conn_resp",
4:"conf_req",5:"conf_resp",6:"disconn_req",
7:"disconn_resp",8:"echo_req",9:"echo_resp",
10:"info_req",11:"info_resp"}),
ByteField("id",0),
LEShortField("len",None) ]
def post_build(self, p, pay):
p += pay
if self.len is None:
l = len(p)-4
p = p[:2]+chr(l&0xff)+chr((l>>8)&0xff)+p[4:]
return p
def answers(self, other):
if other.id == self.id:
if self.code == 1:
return 1
if other.code in [2,4,6,8,10] and self.code == other.code+1:
if other.code == 8:
return 1
return self.payload.answers(other.payload)
return 0
class L2CAP_ConnReq(Packet):
name = "L2CAP Conn Req"
fields_desc = [ LEShortEnumField("psm",0,{1:"SDP",3:"RFCOMM",5:"telephony control"}),
LEShortField("scid",0),
]
class L2CAP_ConnResp(Packet):
name = "L2CAP Conn Resp"
fields_desc = [ LEShortField("dcid",0),
LEShortField("scid",0),
LEShortEnumField("result",0,["no_info","authen_pend","author_pend"]),
LEShortEnumField("status",0,["success","pend","bad_psm",
"cr_sec_block","cr_no_mem"]),
]
def answers(self, other):
return self.scid == other.scid
class L2CAP_CmdRej(Packet):
name = "L2CAP Command Rej"
fields_desc = [ LEShortField("reason",0),
]
class L2CAP_ConfReq(Packet):
name = "L2CAP Conf Req"
fields_desc = [ LEShortField("dcid",0),
LEShortField("flags",0),
]
class L2CAP_ConfResp(Packet):
name = "L2CAP Conf Resp"
fields_desc = [ LEShortField("scid",0),
LEShortField("flags",0),
LEShortEnumField("result",0,["success","unaccept","reject","unknown"]),
]
def answers(self, other):
return self.scid == other.scid
class L2CAP_DisconnReq(Packet):
name = "L2CAP Disconn Req"
fields_desc = [ LEShortField("dcid",0),
LEShortField("scid",0), ]
class L2CAP_DisconnResp(Packet):
name = "L2CAP Disconn Resp"
fields_desc = [ LEShortField("dcid",0),
LEShortField("scid",0), ]
def answers(self, other):
return self.scid == other.scid
class L2CAP_InfoReq(Packet):
name = "L2CAP Info Req"
fields_desc = [ LEShortEnumField("type",0,{1:"CL_MTU",2:"FEAT_MASK"}),
StrField("data","")
]
class L2CAP_InfoResp(Packet):
name = "L2CAP Info Resp"
fields_desc = [ LEShortField("type",0),
LEShortEnumField("result",0,["success","not_supp"]),
StrField("data",""), ]
def answers(self, other):
return self.type == other.type
bind_layers( HCI_Hdr, HCI_ACL_Hdr, type=2)
bind_layers( HCI_Hdr, conf.raw_layer, )
bind_layers( HCI_ACL_Hdr, L2CAP_Hdr, )
bind_layers( L2CAP_Hdr, L2CAP_CmdHdr, cid=1)
bind_layers( L2CAP_CmdHdr, L2CAP_CmdRej, code=1)
bind_layers( L2CAP_CmdHdr, L2CAP_ConnReq, code=2)
bind_layers( L2CAP_CmdHdr, L2CAP_ConnResp, code=3)
bind_layers( L2CAP_CmdHdr, L2CAP_ConfReq, code=4)
bind_layers( L2CAP_CmdHdr, L2CAP_ConfResp, code=5)
bind_layers( L2CAP_CmdHdr, L2CAP_DisconnReq, code=6)
bind_layers( L2CAP_CmdHdr, L2CAP_DisconnResp, code=7)
bind_layers( L2CAP_CmdHdr, L2CAP_InfoReq, code=10)
bind_layers( L2CAP_CmdHdr, L2CAP_InfoResp, code=11)
class BluetoothL2CAPSocket(SuperSocket):
desc = "read/write packets on a connected L2CAP socket"
def __init__(self, peer):
s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_RAW,
socket.BTPROTO_L2CAP)
s.connect((peer,0))
self.ins = self.outs = s
def recv(self, x=MTU):
return L2CAP_CmdHdr(self.ins.recv(x))
class BluetoothHCISocket(SuperSocket):
desc = "read/write on a BlueTooth HCI socket"
def __init__(self, iface=0x10000, type=None):
s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_RAW, socket.BTPROTO_HCI)
s.setsockopt(socket.SOL_HCI, socket.HCI_DATA_DIR,1)
s.setsockopt(socket.SOL_HCI, socket.HCI_TIME_STAMP,1)
s.setsockopt(socket.SOL_HCI, socket.HCI_FILTER, struct.pack("IIIh2x", 0xffffffffL,0xffffffffL,0xffffffffL,0)) #type mask, event mask, event mask, opcode
s.bind((iface,))
self.ins = self.outs = s
# s.connect((peer,0))
def recv(self, x):
return HCI_Hdr(self.ins.recv(x))
## Bluetooth
@conf.commands.register
def srbt(peer, pkts, inter=0.1, *args, **kargs):
"""send and receive using a bluetooth socket"""
s = conf.BTsocket(peer=peer)
a,b = sndrcv(s,pkts,inter=inter,*args,**kargs)
s.close()
return a,b
@conf.commands.register
def srbt1(peer, pkts, *args, **kargs):
"""send and receive 1 packet using a bluetooth socket"""
a,b = srbt(peer, pkts, *args, **kargs)
if len(a) > 0:
return a[0][1]
conf.BTsocket = BluetoothL2CAPSocket
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