def _wrapMacAndZep(self, previousHop, nextHop, lowpan):
'''
Returns Exegin ZEP protocol header and dummy 802.15.4 header
wrapped around outgoing 6LoWPAN layer packet.
'''
phop = previousHop[:]
phop.reverse()
nhop = nextHop[:]
nhop.reverse()
# ZEP
zep = [ord('E'),ord('X')] # Protocol ID String
zep += [0x02] # Protocol Version
zep += [0x01] # Type
zep += [0x00] # Channel ID
zep += [0x00,0x01] # Device ID
zep += [0x01] # LQI/CRC mode
zep += [0xff]
zep += [0x01]*8 # timestamp
zep += [0x02]*4 # sequence number
zep += [0x00]*10 # reserved
zep += [21+len(lowpan)+2] # length
# IEEE802.15.4 (data frame with dummy values)
mac = [0x41,0xcc] # frame control
mac += [0x66] # sequence number
mac += [0xfe,0xca] # destination PAN ID
mac += nhop # destination address
mac += phop # source address
mac += lowpan
# CRC
mac += u.calculateFCS(mac)
return zep+mac
def _wrapMacAndZep(self, previousHop, nextHop, lowpan):
'''
Returns Exegin ZEP protocol header and dummy 802.15.4 header
wrapped around outgoing 6LoWPAN layer packet.
'''
phop = previousHop[:]
phop.reverse()
nhop = nextHop[:]
nhop.reverse()
# ZEP
zep = [ord('E'), ord('X')] # Protocol ID String
zep += [0x02] # Protocol Version
zep += [0x01] # Type
zep += [0x00] # Channel ID
zep += [0x00, 0x01] # Device ID
zep += [0x01] # LQI/CRC mode
zep += [0xff]
zep += [0x01] * 8 # timestamp
zep += [0x02] * 4 # sequence number
zep += [0x00] * 10 # reserved
zep += [21 + len(lowpan) + 2] # length
# IEEE802.15.4 (data frame with dummy values)
mac = [0x41, 0xcc] # frame control
mac += [0x66] # sequence number
mac += [0xfe, 0xca] # destination PAN ID
mac += nhop # destination address
mac += phop # source address
mac += lowpan
# CRC
mac += u.calculateFCS(mac)
return zep + mac
def _wrapZepCrc(self, body, frequency):
# ZEP header
zep = [ord('E'),ord('X')] # Protocol ID String
zep += [0x02] # Protocol Version
zep += [0x01] # Type
zep += [frequency] # Channel ID
zep += [0x00,0x01] # Device ID
zep += [0x01] # LQI/CRC mode
zep += [0xff]
zep += [0x01]*8 # timestamp
zep += [0x02]*4 # sequence number
zep += [0x00]*10 # reserved
zep += [len(body)+2] # length
# mac frame
mac = body
mac += u.calculateFCS(mac)
return zep+mac
def _wrapZepCrc(self, body, frequency):
# ZEP header
zep = [ord('E'), ord('X')] # Protocol ID String
zep += [0x02] # Protocol Version
zep += [0x01] # Type
zep += [frequency] # Channel ID
zep += [0x00, 0x01] # Device ID
zep += [0x01] # LQI/CRC mode
zep += [0xff]
zep += [0x01] * 8 # timestamp
zep += [0x02] * 4 # sequence number
zep += [0x00] * 10 # reserved
zep += [len(body) + 2] # length
# mac frame
mac = body
mac += u.calculateFCS(mac)
return zep + mac
