s="%s %02x" % (s,ord(foo));
print "%s" % s;
+def printmspacket(packet,offset=1):
+ keyword=client.RF_getsmac();
+ #print "keyword=%010x" % key;
+ key=[];
+ for foo in range(0,5):
+ key.append(keyword&0xFF);
+ keyword=(keyword>>8);
+ #print "Keybyte %02x" % key[foo];
+ i=0;
+ s="";
+ for foo in packet:
+ if i>=4:
+ s="%s %02x" % (s,ord(foo)^key[(i+offset)%5]);
+ else:
+ s="%s %02x" % (s,ord(foo));
+ i=i+1;
+ print "%s" % (s);
def printconfig():
print "Encoding %s" % client.RF_getenc();
print "Freq %10i MHz" % (client.RF_getfreq()/10**6);
print "%s regbits" % sys.argv[0];
print "%s pyregs" % sys.argv[0];
print "";
+ print "%s tune aa|55,mac,r5,r6\n\tTunes to a configuration." % sys.argv[0];
print "%s sniff\n\tSniffs packets by current config." % sys.argv[0];
print "%s sniffob\n\tSniffs OpenBeacon traffic." % sys.argv[0];
print "%s snifftp\n\tSniffs Turning Point Clicker traffic." % sys.argv[0];
print "ERROR: Failed to set MAC address.";
print "Final registers:"
printconfig();
-
+
if(sys.argv[1]=="carrier"):
if len(sys.argv)>2:
client.RF_setfreq(eval(sys.argv[2]));
print "\nHolding a carrier wave.";
while(1):
time.sleep(1);
+
+if(sys.argv[1]=="tune"):
+ if len(sys.argv)>2:
+ client.tune(sys.argv[2]);
+ else:
+ print "Specify a tuning, such as 'aa,c78c65805e,14,09'";
if(sys.argv[1]=="regs"):
for r in range(0,0x20):
print "r[0x%02x]=0x%010x //%16s " % (r,client.peek(r),regnames[r]);
printpacket(packet);
sys.stdout.flush();
-class AddressGuesser():
+class AutoTuner():
"""This guesses addresses by searching through packets."""
- #packets=[];
addresses={};
client=None;
- def init(self,goodfet):
+
+ #Limits on search space, because you usually know what you're looking for.
+ rate=False;
+ chan=False;
+ sync=False;
+ startch=0; #Useful for forcing an early match.
+ def init(self,goodfet,
+ rate=True,chan=True,sync=True):
+ """Initializes a link to the GoodFET for autotuning."""
self.client=goodfet;
- def packetaddr(self,packet):
- s="";
+ self.rate=rate;
+ self.chan=chan;
+ self.sync=sync;
+
+ client.poke(0x00,0x00); #Stop nRF
+ client.poke(0x01,0x00); #Disable Shockburst
+ client.poke(0x02,0x01); #Set RX Pipe 0
+
+ #Disable shockburst.
+ client.poke(0x1C,0x00);
+ client.poke(0x1D,0x00);
+
+ client.RF_setmaclen(2); # SETUP_AW for shortest
+
+ #historic
+ #client.RF_setsmac(0x00AA);
+ #client.RF_setsmac(0x0055);
+
+ client.poke(0x00,0x70|0x03); #prime radio.
+
+ return;
+ def packetaddr(self,packet,justmac=False):
+ """Returns a loaded packet address, including channel and rate."""
+
+ sync=self.client.RF_getsmac()&0xFF;
+
+ mac="";
+ #MAC,RF_CH,RATE
for i in range(0,5):
- s="%s%02x" % (s,ord(packet[i]));
- return s;
+ mac="%s%02x" % (mac,ord(packet[i]));
+ if justmac:
+ return mac;
+ ch=self.client.peek(0x05);
+ rate=self.client.peek(0x06);
+ return "%02x,%s,%02x,%02x" % (
+ sync,mac,ch,rate);
+ def validmac(self,packet):
+ sync=self.client.RF_getsmac()&0xFF;
+ mac=self.packetaddr(packet,justmac=True);
+ if (ord(packet[0])&0x80)^(sync&0x80):
+ #print "%02x%02x invalid entry." % (sync,ord(packet[0]));
+ #This is a special kind of failure. Freq is probably right, but MAC is wrong.
+ return False;
+ if mac=='5555555555' or mac=='aaaaaaaaaa' or mac=='0000000000':
+ return False;
+ return True;
+
def handle(self,packet):
+ """Handles a packet."""
#printpacket(packet);
- #self.packets.append(packet);
+
+ if not self.validmac(packet):
+ #print "Dropped packet from %s" % self.packetaddr(packet,justmac=True);
+ #printpacket(packet);
+ return;
+
addr=self.packetaddr(packet);
#Increment the address count.
if self.addresses[addr]>1 or rate>0.01:
print "'%s' looks valid\t%i\t%0.5f" % (
addr,count,rate);
+ return addr;
+ tunecount=0;
+ def selftune(self,threshold=2,forever=False,
+ delay=5.0):
+ """Tunes to the first strong signal.
+ It's important that this not get triggered by false positives."""
+
+ while 1:
+ self.retune();
+ start=time.mktime(time.localtime());
+ while (time.mktime(time.localtime())-start) < delay:
+ packet=None;
+ while packet==None:
+ packet=client.RF_rxpacket();
+ addr=guesser.handle(packet);
+ try:
+ count=self.addresses[addr];
+ except:
+ count=0;
+ if count>threshold:
+ #Tune it in here?
+ client.tune(addr);
+ return addr;
+ sys.stdout.flush();
+
+ def retune(self):
+ """Tunes to another channel or preamble looking for the next packet."""
+ count=self.tunecount;
+ self.tunecount=count+1;
+
+ #Swap the SYNC value most often.
+ if self.sync:
+ sync=0xAA;
+ if count&1:
+ sync=0x55;
+ self.client.RF_setsmac(sync);
+ count=(count>>1);
+
+ if self.rate:
+ #Then the data rate.
+ rate=0;
+
+ #This swaps between 1Mbps and 2Mbps.
+ #TODO add support for 256kbps, if anyone uses it.
+ if count&1:
+ rate=rate|0x08;
+ #print "Setting rate to 0x%02x" % rate;
+ if(rate==0x20):
+ rate=0x08;
+ self.client.poke(0x06,rate);
+ count=(count>>1);
+
+ if self.chan:
+ self.client.poke(0x05,
+ (count+self.startch)&0x7f);
+ print "Tuned to %i MHz" % (
+ self.client.RF_getfreq()
+ /(10**6));
+ #Grab two packets to clear buffers.
+ #Should retune only after a few packets to reduce this delay.
+ packet=client.RF_rxpacket();
+ packet=client.RF_rxpacket();
return;
+
if(sys.argv[1]=="autotune"):
#Reversal of transmitter code from nRF_CMD.c of OpenBeacon
#TODO remove all poke() calls.
- guesser=AddressGuesser();
+ guesser=AutoTuner();
+ guesser.init(client,rate=True,sync=True,chan=True);
- client.poke(0x00,0x00); #Stop nRF
- client.poke(0x01,0x00); #Disable Shockburst
- client.poke(0x02,0x01); #Set RX Pipe 0
#client.RF_setfreq(2481 * 10**6);
- #client.poke(0x06,0x09); #2MBps, -18dBm in RF_SETUP
+ client.poke(0x06,0x09); #2MBps, -18dBm in RF_SETUP
client.poke(0x07,0x78); #Reset status register
- #OpenBeacon defines these in little endian as follows.
- client.RF_setmaclen(2); # SETUP_AW for shortest
-
- #It's better to have a known fragment, when one is available.
- #client.RF_setsmac(0x00AA);
- #client.RF_setsmac(0x0055);
-
- #Should end in 55 or AA depending upon the packet.
- tail=0x55
- if(len(sys.argv)>2):
- tail=int(sys.argv[2],16);
- else:
- print "Please specify a tail of 0xAA or 0x55.";
- sys.exit(1);
- client.RF_setsmac(tail);
+ #This is determined by the MAC, which we don't yet know.
#Longest length.
client.RF_setpacketlen(32);
#Power radio, prime for RX, no checksum
client.poke(0x00,0x70|0x03); #0x08 for checksum, 0x04 for two.
- print "Listening as %010x on %i MHz" % (client.RF_getsmac(),
- client.RF_getfreq()/10**6);
+ print "Autotuning on %i MHz" % (
+ client.RF_getfreq()/10**6);
+ print "sync,mac,r5,r6";
#Now we're ready to get packets.
- while 1:
- packet=None;
- while packet==None:
- packet=client.RF_rxpacket();
- guesser.handle(packet);
- sys.stdout.flush();
+ guesser.selftune(threshold=2,
+ forever=True);
if(sys.argv[1]=="sniffmskb"):
#MSWK 3000 v2.0
#This is the address of a specific keyboard.
#Other keyboards will be different.
-
- client.RF_setmaclen(2);
+ client.RF_setmaclen(5);
#Known pairs. The channel and the low address bytes must match.
#client.RF_setfreq((2400+0x13) * 10**6);
- #client.RF_setsmac(0x0c00a3598cd);
+ #client.RF_setsmac(0xc00a3598cd);
- client.RF_setfreq((2400+0x15) * 10**6);
- client.RF_setsmac( 0x0c10446facd);
+ #client.RF_setfreq((2400+0x15) * 10**6);
+ #client.RF_setsmac(0xc10446facd);
#Mac packet length, illegally 0-length address field.
- client.RF_setpacketlen(32);
+ client.RF_setpacketlen(16);
- #Power radio, prime for RX, no checksum
- client.poke(0x00,0x70|0x03); #0x08 for checksum, 0x04 for two.
+ #aa,c00a3598cd,13,09
+ if len(sys.argv)>2:
+ client.tune(sys.argv[2]);
+ else:
+
+ print "Searching for a keyboard.";
+
+ guesser=AutoTuner();
+ guesser.init(client, rate=False, sync=True, chan=True);
+ guesser.selftune(threshold=4,forever=False,
+ delay=10.0);
+ client.poke(0x00,0x00); #Stop nRF
+ client.poke(0x01,0x00); #Disable Shockburst
+ client.poke(0x02,0x01); #Set RX Pipe 0
+ client.RF_setmaclen(5);
+
+ #Finally, dynamic payload lengths need to be enabled.
+ #client.poke(0x01,0x01);
+ client.poke(0x1C,0x01);
+ client.poke(0x1D,0x06);
+
+ client.poke(0x00,0x70|0x03); #prime radio.
print "Listening as %010x on %i MHz" % (client.RF_getsmac(),
client.RF_getfreq()/10**6);
#Now we're ready to get packets.
while 1:
packet=None;
while packet==None:
- #time.sleep(0.1);
+ #time.sleep(1);
packet=client.RF_rxpacket();
- printpacket(packet);
+ #print ".";
+ printmspacket(packet);
sys.stdout.flush();
sys.stdout.flush();
if(sys.argv[1]=="sniff"):
+ if len(sys.argv)>2:
+ client.tune(sys.argv[2]);
+
#client.poke(0x00,0x00); #Stop nRF
client.poke(0x07,0x78); #Reset status register
- #Power radio, prime for RX, checksum.
- client.poke(0x00,0x70|0x03|0x08);
+ #Power radio, prime for RX, no checksum.
+ client.poke(0x00,0x70|0x03);
+ #Mac packet length.
+ client.RF_setpacketlen(32);
+ #Mac length, reduced
+ #client.RF_setmaclen(3); # SETUP_AW for shortest
print "Listening as %010x on %i MHz" % (client.RF_getsmac(),
client.RF_getfreq()/10**6);
projects / goodfet / blobdiff