def main():
aparse = argparse.ArgumentParser(
description="Connection initiator test script for Sniffle BLE5 sniffer"
)
aparse.add_argument("-s",
"--serport",
default="/dev/ttyACM0",
help="Sniffer serial port name")
aparse.add_argument("-c",
"--advchan",
default=37,
choices=[37, 38, 39],
type=int,
help="Advertising channel to listen on")
aparse.add_argument("-r",
"--rssi",
default=-80,
type=int,
help="Filter packets by minimum RSSI")
aparse.add_argument("-m",
"--mac",
default=None,
help="Specify target MAC address")
aparse.add_argument("-i", "--irk", default=None, help="Specify target IRK")
aparse.add_argument(
"-l",
"--longrange",
action="store_const",
default=False,
const=True,
help="Use long range (coded) PHY for primary advertising")
aparse.add_argument("-P",
"--public",
action="store_const",
default=False,
const=True,
help="Supplied MAC address is public")
args = aparse.parse_args()
global hw
hw = SniffleHW(args.serport)
if args.mac is None and args.irk is None:
print("Must specify target MAC address or IRK", file=sys.stderr)
return
if args.mac and args.irk:
print("IRK and MAC filters are mutually exclusive!", file=sys.stderr)
return
if args.public and args.irk:
print("IRK only works on RPAs, not public addresses!", file=sys.stderr)
return
# set the advertising channel (and return to ad-sniffing mode)
hw.cmd_chan_aa_phy(args.advchan, BLE_ADV_AA, 2 if args.longrange else 0)
# pause after sniffing
hw.cmd_pause_done(True)
# capture advertisements only
hw.cmd_follow(False)
# configure RSSI filter
hw.cmd_rssi(args.rssi)
if args.mac:
try:
macBytes = [int(h, 16) for h in reversed(args.mac.split(":"))]
if len(macBytes) != 6:
raise Exception("Wrong length!")
except:
print("MAC must be 6 colon-separated hex bytes", file=sys.stderr)
return
hw.cmd_mac(macBytes, False)
else:
hw.cmd_irk(unhexlify(args.irk), False)
# initiator doesn't care about this setting, it always accepts aux
hw.cmd_auxadv(False)
# initiator needs a MAC address
hw.random_addr()
if args.irk:
macBytes = get_mac_from_irk()
# zero timestamps and flush old packets
hw.mark_and_flush()
# now enter initiator mode
global _aa
_aa = hw.initiate_conn(macBytes, not args.public)
while True:
msg = hw.recv_and_decode()
print_message(msg)
def main():
aparse = argparse.ArgumentParser(description="Host-side receiver for Sniffle BLE5 sniffer")
aparse.add_argument("-s", "--serport", default="/dev/ttyACM0", help="Sniffer serial port name")
aparse.add_argument("-c", "--advchan", default=40, choices=[37, 38, 39], type=int,
help="Advertising channel to listen on")
aparse.add_argument("-p", "--pause", action="store_const", default=False, const=True,
help="Pause sniffer after disconnect")
aparse.add_argument("-r", "--rssi", default=-80, type=int,
help="Filter packets by minimum RSSI")
aparse.add_argument("-m", "--mac", default=None, help="Filter packets by advertiser MAC")
aparse.add_argument("-i", "--irk", default=None, help="Filter packets by advertiser IRK")
aparse.add_argument("-a", "--advonly", action="store_const", default=False, const=True,
help="Sniff only advertisements, don't follow connections")
aparse.add_argument("-e", "--extadv", action="store_const", default=False, const=True,
help="Capture BT5 extended (auxiliary) advertising")
aparse.add_argument("-H", "--hop", action="store_const", default=False, const=True,
help="Hop primary advertising channels in extended mode")
aparse.add_argument("-l", "--longrange", action="store_const", default=False, const=True,
help="Use long range (coded) PHY for primary advertising")
aparse.add_argument("-q", "--quiet", action="store_const", default=False, const=True,
help="Don't display empty packets")
aparse.add_argument("-Q", "--preload", default=None, help="Preload expected encrypted "
"connection parameter changes")
aparse.add_argument("-o", "--output", default=None, help="PCAP output file name")
args = aparse.parse_args()
# Sanity check argument combinations
if args.hop and args.mac is None and args.irk is None:
print("Primary adv. channel hop requires a MAC address or IRK specified!", file=sys.stderr)
return
if args.longrange and not args.extadv:
print("Long-range PHY only supported in extended advertising!", file=sys.stderr)
return
if args.longrange and args.hop:
# this would be pointless anyway, since long range always uses extended ads
print("Primary ad channel hopping unsupported on long range PHY!", file=sys.stderr)
return
if args.mac and args.irk:
print("IRK and MAC filters are mutually exclusive!", file=sys.stderr)
return
if args.advchan != 40 and args.hop:
print("Don't specify an advertising channel if you want advertising channel hopping!", file=sys.stderr)
return
global hw
hw = SniffleHW(args.serport)
# if a channel was explicitly specified, don't hop
global _allow_hop3
if args.advchan == 40:
args.advchan = 37
else:
_allow_hop3 = False
# set the advertising channel (and return to ad-sniffing mode)
hw.cmd_chan_aa_phy(args.advchan, BLE_ADV_AA, 2 if args.longrange else 0)
# set whether or not to pause after sniffing
hw.cmd_pause_done(args.pause)
# set up whether or not to follow connections
hw.cmd_follow(not args.advonly)
if args.preload:
# expect colon separated triplets, separated by commas
triplets = []
for tstr in args.preload.split(','):
tsplit = tstr.split(':')
tup = (int(tsplit[0]), int(tsplit[1]), int(tsplit[2]))
triplets.append(tup)
hw.cmd_interval_preload(triplets)
else:
# reset preloaded encrypted connection interval changes
hw.cmd_interval_preload()
# configure RSSI filter
global _rssi_min
_rssi_min = args.rssi
hw.cmd_rssi(args.rssi)
# disable 37/38/39 hop in extended mode unless overridden
if args.extadv and not args.hop:
_allow_hop3 = False
# configure MAC filter
global _delay_top_mac
if args.mac is None and args.irk is None:
hw.cmd_mac()
elif args.irk:
hw.cmd_irk(unhexlify(args.irk), _allow_hop3)
elif args.mac == "top":
hw.cmd_mac()
_delay_top_mac = True
else:
try:
macBytes = [int(h, 16) for h in reversed(args.mac.split(":"))]
if len(macBytes) != 6:
raise Exception("Wrong length!")
except:
print("MAC must be 6 colon-separated hex bytes", file=sys.stderr)
return
hw.cmd_mac(macBytes, _allow_hop3)
# configure BT5 extended (aux/secondary) advertising
hw.cmd_auxadv(args.extadv)
# zero timestamps and flush old packets
hw.mark_and_flush()
global pcwriter
if not (args.output is None):
pcwriter = PcapBleWriter(args.output)
while True:
msg = hw.recv_and_decode()
print_message(msg, args.quiet)