def RCVD_INFORM(self,pkt):
print"now build the DHCP ACK"
ackinstance = DHCP_ACK()
ack = ackinstance.p
ack[Ether].dst = pkt[Ether].src
ack[BOOTP].xid = pkt[BOOTP].xid
if pkt[BOOTP].flags == 1:
ack[BOOTP].flags = 1
if self.offerip == '':
ack[BOOTP].yiaddr = self.ippool[0]
else:
ack[BOOTP].yiaddr = self.offerip
ack[BOOTP].chaddr = pkt[Ether].src
ack[MSGTYPE].type = 5
ack[DHCP].options.pop(2)
np = compute_pad(ack) #compute the number of pads
if np == 1:
pad = PAD()
pad.code = 0
ack[DHCP].options.append(pad)
else:
raw = Raw()
raw.load = '\x00'*np
#p[DHCP].options.insert(4,raw)
ack[DHCP].options.append(raw)
print "now show the DHCP ACK"
ack.show2()
print"now send the DHCP ACK"
sendp(ack)
def __init__(self):
DHCP_OFFER.__init__(self)
self.p[DHCP].options.remove(self.leasetime)
self.p[DHCP].options.remove(self.submask)
self.p[DHCP].options.remove(self.router)
self.p[DHCP].options.remove(self.dns)
try:
self.p[DHCP].options.remove(self.pad)
except:
self.p[DHCP].options.remove(self.raw)
self.np = compute_pad(self.p) #compute the number of pads
if self.np == 1:
pad = PAD()
pad.code = 0
self.p[DHCP].options.append(pad)
else:
raw = Raw()
raw.load = '\x00'*self.np
self.p[DHCP].options.append(raw)
