def ATTWriteReqHandler(self, dictionary, func):
'''
handle write req,
Limitation: no signature and command type checking
'''
def _sendATTWriteRsp(conn_handle):
print("COMMAND: ATT_WriteRsp")
print(utils.printOutput(self.ble_builder.send("fd13", conn_handle = conn_handle)))
def _handleIndication(conn_handle, handle, start_handle, end_handle): #to-do refactor for better usability
print("COMMAND: ATT_HandleValueIndication")
handle = handle
value = start_handle+end_handle
# print(utils.printOutput(self.ble_builder.send("fd1d", conn_handle = conn_handle, handle = handle, value = value)))
conn_handle = dictionary['conn_handle'][0]
handle = dictionary['handle']
value = dictionary['value']
value_str = value[1]
handle_raw = handle[0]
handle_str = handle[1]
_sendATTWriteRsp(conn_handle)
#get data from gatt table
if handle_str < self.preserved_handle_eom: #attampt to write preserved services
if handle_str == "0009" and value_str == "0002": #ask for service changes, tempararily fix to return non-reserved handles
start_handle = utils.stringToSByteInHex(utils.stringMinusInHex(self.preserved_handle_eom, -1))[::-1]
end_handle = utils.stringToSByteInHex(self.handles[-1])[::-1]
char_handle = utils.hexMinusInHex(handle_raw, 1)
_handleIndication(conn_handle, char_handle, start_handle, end_handle)
else: #external services, tempararily fix to trigger call notification call back or do nothing
if value_str == "0001": #Notification
sql = sqls.sql_select_uuid_by_handle % utils.stringMinusInHex(handle_str, 1)
data = self._execute_sql(sql)
uuid = data[0][0]
char_handle = utils.hexMinusInHex(handle_raw, 1)
func(uuid, char_handle, conn_handle)
def _get_pdu( data):
eof = "\xff\xff\xff\xff"
pdu = ""
if data:
try:
for i in range(len(data)):
if data[i][0] == "0014":
pass
temp_start = utils.stringToSByteInHex(data[i][0])[::-1] #start handle
temp_value = utils.stringToSByteInHex(data[i][1].replace(":","")) #value
#get end handle
if i + 1 > range(len(data))[-1]:
temp_end = utils.stringToSByteInHex("001b")[::-1] #this is the last service, end handle is the last one of all handles
else:
temp_end = utils.stringToSByteInHex(utils.stringMinusInHex(data[i+1][0],1))[::-1] #this is not the last service then the end handle is the handle of next service minus one
if len(temp_value) == 16: #this is 128bit uuid, then only return one service info
pdu = temp_start + temp_end + temp_value
break
else:
if len(pdu) + 4 + len(temp_value) > 12 : #if total pdu exceeds the maxmium length, do not append, only two services returned each time
break
elif i + 1 <= range(len(data))[-1]:
next_value = utils.stringToSByteInHex(data[i+1][1].replace(":",""))
if len(next_value) == 16:
if pdu:
pdu = pdu + temp_start + temp_end + temp_value
break
else:
pdu = temp_start + temp_end + temp_value
break
else:
pdu = pdu + temp_start + temp_end + temp_value
else:
pdu = pdu + temp_start + temp_end + temp_value #append pdu
except Exception, e:
print e
pdu = eof