def build(self):
options = [
('message-type', self.type)
]
pxelinux = False
for k, v in self.options.items():
if k == 'enabled': continue
if not k in DHCPRevOptions:
log.warning('Unknown DHCP option: %s' % k)
continue
if k.startswith('pxelinux'):
pxelinux = True
if isinstance(v, unicode):
v = v.encode('ascii', 'ignore')
options.append((k, v))
if pxelinux:
options.append(('pxelinux-magic', '\xf1\x00\x75\x7e'))
bootp_options = {
'op': 2,
'xid': self.request.packet.xid,
'ciaddr': '0.0.0.0',
'yiaddr': self.offerip,
'chaddr': self.request.packet.chaddr,
}
if 'tftp_server' in self.options:
bootp_options['siaddr'] = self.options['tftp_server']
if 'tftp_filename' in self.options:
bootp_options['file'] = self.options['tftp_filename']
for k, v in bootp_options.items():
if isinstance(v, unicode):
bootp_options[k] = v.encode('ascii', 'ignore')
pkt = BOOTP(**bootp_options)/DHCP(options=options)
#pkt.show()
return pkt.build()
def build(self):
options = [("message-type", self.type)]
pxelinux = False
for k, v in self.options.items():
if k == "enabled":
continue
if not k in DHCPRevOptions:
log.warning("Unknown DHCP option: %s" % k)
continue
if k.startswith("pxelinux"):
pxelinux = True
if isinstance(v, unicode):
v = v.encode("ascii", "ignore")
options.append((k, v))
if pxelinux:
options.append(("pxelinux-magic", "\xf1\x00\x75\x7e"))
bootp_options = {
"op": 2,
"xid": self.request.packet.xid,
"ciaddr": self.offerip,
"yiaddr": self.offerip,
"chaddr": self.request.packet.chaddr,
}
if "tftp_server" in self.options:
bootp_options["siaddr"] = self.options["tftp_server"]
if "tftp_filename" in self.options:
bootp_options["file"] = self.options["tftp_filename"]
for k, v in bootp_options.items():
if isinstance(v, unicode):
bootp_options[k] = v.encode("ascii", "ignore")
pkt = BOOTP(**bootp_options) / DHCP(options=options)
# pkt.show()
return pkt.build()
from scapy.all import DHCP, ARP, BOOTP, Ether, UDP, TCP, IP
# data link layer
ethernet = Ether()
ethernet.show()
ethernet.dst = "ff:ff:ff:ff:ff:ff"
# network layer
ip = IP()
ip.show()
ip.dst = "255.255.255.255"
# transport layer
udp = UDP()
udp.show()
udp.sport = 68
udp.dport = 67
# application layer
bootp = BOOTP()
bootp.show()
bootp.flags = 1
dhcp = DHCP()
dhcp.show()
dhcp.options = [("message-type", "discover"), "end"]
packet = ethernet / ip / udp / bootp / dhcp
sendp(packet)
# -*- coding: utf-8 -*-
# vim:ts=4:sw=4:expandtab
# Copyright 2016, 2017 juga (juga at riseup dot net), MIT license.
"""."""
from scapy.all import BOOTP, DHCP, IP, UDP, Ether
# client packets
dhcp_discover = (
Ether(src="00:01:02:03:04:05", dst="ff:ff:ff:ff:ff:ff") /
IP(src="0.0.0.0", dst="255.255.255.255") / UDP(sport=68, dport=67) /
BOOTP(chaddr=[b'\x00\x01\x02\x03\x04\x05'], xid=900000000) /
DHCP(options=[('message-type',
'discover'), ("client_id", b'\x00\x01\x02\x03\x04\x05'),
("param_req_list",
b"\x01\x03\x06\x0f\x1f\x21\x2b\x2c\x2e\x2f\x79\xf9\xfc"
), 'end']))
dhcp_request = (
Ether(src="00:01:02:03:04:05", dst="ff:ff:ff:ff:ff:ff") /
IP(src="0.0.0.0", dst="255.255.255.255") / UDP(sport=68, dport=67) /
BOOTP(chaddr=[b'\x00\x01\x02\x03\x04\x05'], xid=900000000) /
DHCP(options=[('message-type',
'request'), ("client_id", b'\x00\x01\x02\x03\x04\x05'),
("param_req_list",
b"\x01\x03\x06\x0f\x1f\x21\x2b\x2c\x2e\x2f\x79\xf9\xfc"),
("requested_addr",
"192.168.1.23"), ("server_id", "192.168.1.1"), 'end']))
dhcp_request_unicast = (
Ether(src="00:01:02:03:04:05", dst="00:0a:0b:0c:0d:0f") /
'''
Sample script to send a DHCP discover
'''
from scapy.sendrecv import sendp, sniff
from scapy.all import DHCP, ARP, BOOTP, Ether, UDP, TCP, IP, srp1
# data link layer
ethernet = Ether()
ethernet.dst = 'ff:ff:ff:ff:ff:ff'
# network layer
ip = IP()
ip.dst = '192.168.0.255'
# transport layer
udp = UDP()
udp.sport = 68
udp.dport = 67
# application layer
bootp = BOOTP()
bootp.flags = 1
dhcp = DHCP()
dhcp.options = [("message-type", "discover"), "end"]
packet = ethernet / ip / udp / bootp / dhcp
ans = srp1(packet, iface='wlp4s0')
ans.show()
from scapy.all import get_if_raw_hwaddr, Ether, IP, UDP, BOOTP, conf
netcard = raw_input("Please enter network card name: ")
fam, hw = get_if_raw_hwaddr(netcard)
bcast = Ether(dst="ff:ff:ff:ff:ff:ff")
ipbcast = IP(src='0.0.0.0', dst='255.255.255.255')
dhcpclisrvports = UDP(sport=68, dport=67)
dhcpproto = BOOTP(chaddr=hw)
pktboot = bcast / ipbcast / dhcpclisrvports / dhcpproto
conf.checkIPaddr = False
