def getHardwareAddress(self):
"""
Extracts the client's MAC address from the DHCP packet.
@rtype: str
@return: The client's MAC address.
"""
length = self.getOption("hlen")[0]
full_hw = self.getOption("chaddr")
if length and length < len(full_hw):
return hwmac(full_hw[0:length]).str()
return hwmac(full_hw).str()
def _OptionsToBinary(self,parameter,value) :
# Transform textual data into dhcp binary data
p = parameter.strip()
# 1- Search for header informations or specific parameter
if p == 'op' or p == 'htype' :
value = value.strip()
if value.isdigit() : return [int(value)]
try :
value = DhcpNames[value.strip()]
return [value]
except KeyError :
return [0]
elif p == 'hlen' or p == 'hops' :
try :
value = int(value)
return [value]
except ValueError :
return [0]
elif p == 'secs' or p == 'flags' :
try :
value = ipv4(int(value)).list()
except ValueError :
value = [0,0,0,0]
return value[2:]
elif p == 'xid' :
try :
value = ipv4(int(value)).list()
except ValueError :
value = [0,0,0,0]
return value
elif p == 'ciaddr' or p == 'yiaddr' or p == 'siaddr' or p == 'giaddr' :
try :
ip = ipv4(value).list()
except ValueError :
ip = [0,0,0,0]
return ip
elif p == 'chaddr' :
try:
value = hwmac(value).list()+[0]*10
except ValueError,TypeError :
value = [0]*16
return value
def _OptionsToBinary(self, parameter, value):
# Transform textual data into dhcp binary data
p = parameter.strip()
# 1- Search for header informations or specific parameter
if p == 'op' or p == 'htype':
value = value.strip()
if value.isdigit(): return [int(value)]
try:
value = DhcpNames[value.strip()]
return [value]
except KeyError:
return [0]
elif p == 'hlen' or p == 'hops':
try:
value = int(value)
return [value]
except ValueError:
return [0]
elif p == 'secs' or p == 'flags':
try:
value = ipv4(int(value)).list()
except ValueError:
value = [0, 0, 0, 0]
return value[2:]
elif p == 'xid':
try:
value = ipv4(int(value)).list()
except ValueError:
value = [0, 0, 0, 0]
return value
elif p == 'ciaddr' or p == 'yiaddr' or p == 'siaddr' or p == 'giaddr':
try:
ip = ipv4(value).list()
except ValueError:
ip = [0, 0, 0, 0]
return ip
elif p == 'chaddr':
try:
value = hwmac(value).list() + [0] * 10
except ValueError, TypeError:
value = [0] * 16
return value
def _OptionsToBinary(self, parameter, value):
# Transform textual data into dhcp binary data
p = parameter.strip()
# 1- Search for header informations or specific parameter
if p == 'op' or p == 'htype':
value = value.strip()
if value.isdigit(): return [int(value)]
try:
value = DhcpNames[value.strip()]
return [value]
except KeyError:
return [0]
elif p == 'hlen' or p == 'hops':
try:
value = int(value)
return [value]
except ValueError:
return [0]
elif p == 'secs' or p == 'flags':
try:
value = ipv4(int(value)).list()
except ValueError:
value = [0, 0, 0, 0]
return value[2:]
elif p == 'xid':
try:
value = ipv4(int(value)).list()
except ValueError:
value = [0, 0, 0, 0]
return value
elif p == 'ciaddr' or p == 'yiaddr' or p == 'siaddr' or p == 'giaddr':
try:
ip = ipv4(value).list()
except ValueError:
ip = [0, 0, 0, 0]
return ip
elif p == 'chaddr':
try:
value = hwmac(value).list() + [0] * 10
except (ValueError, TypeError):
value = [0] * 16
return value
elif p == 'sname':
return
elif p == 'file':
return
elif p == 'parameter_request_list':
value = value.strip().split(',')
tmp = []
for each in value:
if DhcpOptions.has_key(each): tmp.append(DhcpOptions[each])
return tmp
elif p == 'dhcp_message_type':
try:
return [DhcpNames[value]]
except KeyError:
return
# 2- Search for options
try:
option_type = DhcpOptionsTypes[DhcpOptions[parameter]]
except KeyError:
return False
if option_type == "ipv4":
# this is a single ip address
try:
binary_value = map(int, value.split("."))
except ValueError:
return False
elif option_type == "ipv4+":
# this is multiple ip address
iplist = value.split(",")
opt = []
for single in iplist:
opt += (ipv4(single).list())
binary_value = opt
elif option_type == "32-bits":
# This is probably a number...
try:
digit = int(value)
binary_value = [
digit >> 24 & 0xFF, (digit >> 16) & 0xFF,
(digit >> 8) & 0xFF, digit & 0xFF
]
except ValueError:
return False
elif option_type == "16-bits":
try:
digit = int(value)
binary_value = [(digit >> 8) & 0xFF, digit & 0xFF]
except ValueError:
return False
elif option_type == "char":
try:
digit = int(value)
binary_value = [digit & 0xFF]
except ValueError:
return False
elif option_type == "bool":
if value == "False" or value == "false" or value == 0:
binary_value = [0]
else:
binary_value = [1]
elif option_type == "string":
binary_value = strlist(value).list()
else:
binary_value = strlist(value).list()
return binary_value
