From 91961994a4791be18b0a1f2dda2e5162823670f5 Mon Sep 17 00:00:00 2001 From: Patrik Hrnciar Date: Wed, 3 Aug 2016 09:52:05 +0200 Subject: CSIT-341 Refactor DHCPv4 proxy test Change-Id: Id44ef8677f8b023c9cb6a3fec7dc8e3fc1d979d4 Signed-off-by: Patrik Hrnciar --- .../dhcp/send_and_check_proxy_discover.py | 79 ++++++ .../dhcp/send_and_check_proxy_messages.py | 299 ++++++++++++++++++++ .../traffic_scripts/dhcp/send_dhcp_discover.py | 74 ----- .../traffic_scripts/dhcp/send_dhcp_messages.py | 307 --------------------- 4 files changed, 378 insertions(+), 381 deletions(-) create mode 100755 resources/traffic_scripts/dhcp/send_and_check_proxy_discover.py create mode 100755 resources/traffic_scripts/dhcp/send_and_check_proxy_messages.py delete mode 100755 resources/traffic_scripts/dhcp/send_dhcp_discover.py delete mode 100755 resources/traffic_scripts/dhcp/send_dhcp_messages.py (limited to 'resources/traffic_scripts/dhcp') diff --git a/resources/traffic_scripts/dhcp/send_and_check_proxy_discover.py b/resources/traffic_scripts/dhcp/send_and_check_proxy_discover.py new file mode 100755 index 0000000000..d8089713fd --- /dev/null +++ b/resources/traffic_scripts/dhcp/send_and_check_proxy_discover.py @@ -0,0 +1,79 @@ +#!/usr/bin/env python +# Copyright (c) 2016 Cisco and/or its affiliates. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +"""Traffic script that sends DHCP DISCOVER packet + and check if is received on interface.""" + +import sys + +from scapy.all import Ether +from scapy.layers.inet import IP, UDP +from scapy.layers.inet import UDP_SERVICES +from scapy.layers.dhcp import DHCP, BOOTP + +from resources.libraries.python.PacketVerifier import RxQueue, TxQueue +from resources.libraries.python.TrafficScriptArg import TrafficScriptArg + + +def is_discover(pkt): + """If DHCP message type option is set to dhcp discover return True, + else return False. False is returned also if exception occurs.""" + dhcp_discover = 1 + try: + dhcp_options = pkt['BOOTP']['DHCP options'].options + message_type = filter(lambda x: x[0] == 'message-type', + dhcp_options) + message_type = message_type[0][1] + return message_type == dhcp_discover + except: + return False + + +def main(): + """Send DHCP DISCOVER packet.""" + + args = TrafficScriptArg(['tx_src_ip', 'tx_dst_ip']) + + tx_if = args.get_arg('tx_if') + rx_if = args.get_arg('rx_if') + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + tx_src_ip = args.get_arg('tx_src_ip') + tx_dst_ip = args.get_arg('tx_dst_ip') + + sent_packets = [] + + dhcp_discover = Ether(dst="ff:ff:ff:ff:ff:ff") / \ + IP(src=tx_src_ip, dst=tx_dst_ip) / \ + UDP(sport=UDP_SERVICES.bootpc, dport=UDP_SERVICES.bootps) / \ + BOOTP(op=1,) / \ + DHCP(options=[("message-type", "discover"), + "end"]) + + sent_packets.append(dhcp_discover) + txq.send(dhcp_discover) + + for _ in range(10): + dhcp_discover = rxq.recv(2) + if is_discover(dhcp_discover): + break + else: + raise RuntimeError("DHCP DISCOVER Rx timeout") + + sys.exit(0) + +if __name__ == "__main__": + main() diff --git a/resources/traffic_scripts/dhcp/send_and_check_proxy_messages.py b/resources/traffic_scripts/dhcp/send_and_check_proxy_messages.py new file mode 100755 index 0000000000..27f148c900 --- /dev/null +++ b/resources/traffic_scripts/dhcp/send_and_check_proxy_messages.py @@ -0,0 +1,299 @@ +#!/usr/bin/env python +# Copyright (c) 2016 Cisco and/or its affiliates. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +"""Traffic script that sends DHCP packets.""" + +import sys + +from scapy.all import Ether +from scapy.layers.inet import IP, UDP +from scapy.layers.inet import UDP_SERVICES +from scapy.layers.dhcp import DHCP, BOOTP + +from resources.libraries.python.PacketVerifier import RxQueue, TxQueue +from resources.libraries.python.TrafficScriptArg import TrafficScriptArg + + +def dhcp_discover(tx_if, rx_if, tx_src_ip, tx_dst_ip, server_ip, proxy_ip, + client_mac): + """Send and check DHCP DISCOVER proxy packet.""" + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + sent_packets = [] + + dhcp_discover = Ether(src=client_mac, dst="ff:ff:ff:ff:ff:ff") / \ + IP(src=tx_src_ip, dst=tx_dst_ip) / \ + UDP(sport=UDP_SERVICES.bootpc, dport=UDP_SERVICES.bootps) / \ + BOOTP(op=1,) / \ + DHCP(options=[("message-type", "discover"), + "end"]) + + sent_packets.append(dhcp_discover) + txq.send(dhcp_discover) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCP DISCOVER timeout') + + if ether[IP].src != proxy_ip: + raise RuntimeError("Source IP address error.") + print "Source IP address: OK." + + if ether[IP].dst != server_ip: + raise RuntimeError("Destination IP address error.") + print "Destination IP address: OK." + + if ether[UDP].dport != UDP_SERVICES.bootps: + raise RuntimeError("UDP destination port error.") + print "UDP destination port: OK." + + if ether[UDP].sport != UDP_SERVICES.bootpc: + raise RuntimeError("UDP source port error.") + print "UDP source port: OK." + + if ether[DHCP].options[1][0] != 'relay_agent_Information': # option 82 + raise RuntimeError("Relay agent information error.") + option_82 = ether[DHCP].options[1][1] + + if ether[DHCP].options[0][1] != 1: # 1 - DISCOVER message + raise RuntimeError("DHCP DISCOVER message error.") + print "DHCP DISCOVER message OK." + + return option_82 + + +def dhcp_offer(rx_if, tx_if, tx_dst_ip, server_ip, proxy_ip, client_ip, + server_mac, option_82): + """Send and check DHCP OFFER proxy packet.""" + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + sent_packets = [] + + dhcp_offer = Ether(src=server_mac, dst="ff:ff:ff:ff:ff:ff") / \ + IP(src=server_ip, dst=tx_dst_ip) / \ + UDP(sport=UDP_SERVICES.bootps, dport=UDP_SERVICES.bootpc) / \ + BOOTP(op=2, + yiaddr=client_ip, + siaddr=server_ip) / \ + DHCP(options= + [("message-type", "offer"), + ("server_id", server_ip), + ("relay_agent_Information", option_82), + "end"]) + + txq.send(dhcp_offer) + sent_packets.append(dhcp_offer) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCP OFFER timeout') + + if ether[IP].dst != tx_dst_ip: + raise RuntimeError("Destination IP address error.") + print "Destination IP address: OK." + + if ether[IP].src != proxy_ip: + raise RuntimeError("Source IP address error.") + print "Source IP address: OK." + + if ether[UDP].dport != UDP_SERVICES.bootpc: + raise RuntimeError("UDP destination port error.") + print "UDP destination port: OK." + + if ether[UDP].sport != UDP_SERVICES.bootps: + raise RuntimeError("UDP source port error.") + print "UDP source port: OK." + + if ether[BOOTP].yiaddr != client_ip: + raise RuntimeError("Client IP address error.") + print "Client IP address: OK." + + if ether[BOOTP].siaddr != server_ip: + raise RuntimeError("DHCP server IP address error.") + print "DHCP server IP address: OK." + + if ether[DHCP].options[0][1] != 2: # 2 - OFFER message + raise RuntimeError("DHCP OFFER message error.") + print "DHCP OFFER message OK." + + +def dhcp_request(tx_if, rx_if, tx_src_ip, tx_dst_ip, server_ip, proxy_ip, + client_ip, client_mac): + """Send and check DHCP REQUEST proxy packet.""" + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + sent_packets = [] + + dhcp_request = Ether(src=client_mac, dst="ff:ff:ff:ff:ff:ff") / \ + IP(src=tx_src_ip, dst=tx_dst_ip) / \ + UDP(sport=UDP_SERVICES.bootpc, dport=UDP_SERVICES.bootps) / \ + BOOTP(op=1, + giaddr=proxy_ip, + siaddr=server_ip) / \ + DHCP(options=[("message-type", "request"), + ("server_id", server_ip), + ("requested_addr", client_ip), + "end"]) + + sent_packets.append(dhcp_request) + txq.send(dhcp_request) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCP REQUEST timeout') + + if ether[IP].dst != server_ip: + raise RuntimeError("Destination IP address error.") + print "Destination IP address: OK." + + if ether[IP].src != proxy_ip: + raise RuntimeError("Source IP address error.") + print "Source IP address: OK." + + if ether[UDP].dport != UDP_SERVICES.bootps: + raise RuntimeError("UDP destination port error.") + print "UDP destination port: OK." + + if ether[UDP].sport != UDP_SERVICES.bootpc: + raise RuntimeError("UDP source port error.") + print "UDP source port: OK." + + if ether[BOOTP].siaddr != server_ip: + raise RuntimeError("DHCP server IP address error.") + print "DHCP server IP address: OK." + + if ether[DHCP].options[2][1] != client_ip: + raise RuntimeError("Requested IP address error.") + print "Requested IP address: OK." + + if ether[DHCP].options[3][0] != 'relay_agent_Information': # option 82 + raise RuntimeError("Relay agent information error.") + + if ether[DHCP].options[0][1] != 3: # 2 - REQUEST message + raise RuntimeError("DHCP REQUEST message error.") + print "DHCP REQUEST message: OK." + + +def dhcp_ack(rx_if, tx_if, tx_dst_ip, server_ip, proxy_ip, client_ip, + server_mac, option_82): + """Send and check DHCP ACK proxy packet.""" + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + lease_time = 43200 # 12 hours + + sent_packets = [] + + dhcp_ack = Ether(src=server_mac, dst="ff:ff:ff:ff:ff:ff") / \ + IP(src=server_ip, dst=tx_dst_ip) / \ + UDP(sport=UDP_SERVICES.bootps, dport=UDP_SERVICES.bootpc) / \ + BOOTP(op=2, + yiaddr=client_ip, + siaddr=server_ip) / \ + DHCP(options= + [("message-type", "ack"), + ("server_id", server_ip), + ("lease_time", lease_time), + ("relay_agent_Information", option_82), + "end"]) + + txq.send(dhcp_ack) + sent_packets.append(dhcp_ack) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCP ACK timeout') + + if ether[IP].dst != tx_dst_ip: + raise RuntimeError("Destination IP address error.") + print "Destination IP address: OK." + + if ether[IP].src != proxy_ip: + raise RuntimeError("Source IP address error.") + print "Source IP address: OK." + + if ether[UDP].dport != UDP_SERVICES.bootpc: + raise RuntimeError("UDP destination port error.") + print "UDP destination port: OK." + + if ether[UDP].sport != UDP_SERVICES.bootps: + raise RuntimeError("UDP source port error.") + print "UDP source port: OK." + + if ether[BOOTP].yiaddr != client_ip: + raise RuntimeError("Client IP address error.") + print "Client IP address: OK." + + if ether[BOOTP].siaddr != server_ip: + raise RuntimeError("DHCP server IP address error.") + print "DHCP server IP address: OK." + + if ether[DHCP].options[2][1] != lease_time: + raise RuntimeError("DHCP lease time error.") + print "DHCP lease time OK." + + if ether[DHCP].options[0][1] != 5: # 5 - ACK message + raise RuntimeError("DHCP ACK message error.") + print "DHCP ACK message OK." + + +def main(): + """Send DHCP proxy messages.""" + + args = TrafficScriptArg(['server_ip', 'server_mac', 'client_ip', + 'client_mac', 'proxy_ip']) + + tx_if = args.get_arg('tx_if') + rx_if = args.get_arg('rx_if') + + tx_src_ip = "0.0.0.0" + tx_dst_ip = "255.255.255.255" + + server_ip = args.get_arg('server_ip') + client_ip = args.get_arg('client_ip') + proxy_ip = args.get_arg('proxy_ip') + client_mac = args.get_arg('client_mac') + server_mac = args.get_arg('server_mac') + + # DHCP DISCOVER + option_82 = dhcp_discover(tx_if, rx_if, tx_src_ip, tx_dst_ip, server_ip, + proxy_ip, client_mac) + + # DHCP OFFER + dhcp_offer(tx_if, rx_if, tx_dst_ip, server_ip, proxy_ip, client_ip, + server_mac, option_82) + + # DHCP REQUEST + dhcp_request(tx_if, rx_if, tx_src_ip, tx_dst_ip, server_ip, proxy_ip, + client_ip, client_mac) + + # DHCP ACK + dhcp_ack(tx_if, rx_if, tx_dst_ip, server_ip, proxy_ip, client_ip, + server_mac, option_82) + + sys.exit(0) + +if __name__ == "__main__": + main() diff --git a/resources/traffic_scripts/dhcp/send_dhcp_discover.py b/resources/traffic_scripts/dhcp/send_dhcp_discover.py deleted file mode 100755 index 1715bb1d01..0000000000 --- a/resources/traffic_scripts/dhcp/send_dhcp_discover.py +++ /dev/null @@ -1,74 +0,0 @@ -#!/usr/bin/env python -# Copyright (c) 2016 Cisco and/or its affiliates. -# Licensed under the Apache License, Version 2.0 (the "License"); -# you may not use this file except in compliance with the License. -# You may obtain a copy of the License at: -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and -# limitations under the License. - -"""Traffic script that sends DHCP DISCOVER packets.""" - -import sys - -from scapy.all import Ether -from scapy.layers.inet import IP, UDP -from scapy.layers.inet import UDP_SERVICES -from scapy.layers.dhcp import DHCP, BOOTP - -from resources.libraries.python.PacketVerifier import RxQueue, TxQueue -from resources.libraries.python.TrafficScriptArg import TrafficScriptArg - - -def main(): - """Send DHCP DISCOVER packet.""" - - args = TrafficScriptArg(['tx_src_ip', 'tx_dst_ip']) - - tx_if = args.get_arg('tx_if') - rx_if = args.get_arg('rx_if') - - rxq = RxQueue(rx_if) - txq = TxQueue(tx_if) - - tx_src_ip = args.get_arg('tx_src_ip') - tx_dst_ip = args.get_arg('tx_dst_ip') - - sent_packets = [] - - dhcp_discover = Ether(dst="ff:ff:ff:ff:ff:ff") / \ - IP(src=tx_src_ip, dst=tx_dst_ip) / \ - UDP(sport=68, dport=67) / \ - BOOTP(op=1,) / \ - DHCP(options=[("message-type", "discover"), - "end"]) - - sent_packets.append(dhcp_discover) - txq.send(dhcp_discover) - - ether = rxq.recv(2) - - if ether is None: - raise RuntimeError('DHCP DISCOVER timeout') - - if ether[UDP].dport != UDP_SERVICES.bootps: - raise RuntimeError("UDP destination port error.") - print "UDP destination port: OK." - - if ether[UDP].sport != UDP_SERVICES.bootpc: - raise RuntimeError("UDP source port error.") - print "UDP source port: OK." - - if ether[DHCP].options[0][1] != 1: # 1 - DISCOVER message - raise RuntimeError("DHCP DISCOVER message error.") - print "DHCP DISCOVER message OK." - - sys.exit(0) - -if __name__ == "__main__": - main() diff --git a/resources/traffic_scripts/dhcp/send_dhcp_messages.py b/resources/traffic_scripts/dhcp/send_dhcp_messages.py deleted file mode 100755 index 7881c24afd..0000000000 --- a/resources/traffic_scripts/dhcp/send_dhcp_messages.py +++ /dev/null @@ -1,307 +0,0 @@ -#!/usr/bin/env python -# Copyright (c) 2016 Cisco and/or its affiliates. -# Licensed under the Apache License, Version 2.0 (the "License"); -# you may not use this file except in compliance with the License. -# You may obtain a copy of the License at: -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and -# limitations under the License. - -"""Traffic script that sends DHCP packets.""" - -import sys - -from scapy.all import Ether -from scapy.layers.inet import IP, UDP -from scapy.layers.inet import UDP_SERVICES -from scapy.layers.dhcp import DHCP, BOOTP - -from resources.libraries.python.PacketVerifier import RxQueue, TxQueue -from resources.libraries.python.TrafficScriptArg import TrafficScriptArg - - -def dhcp_discover(args): - """Send DHCP DISCOVER packet.""" - - tx_if = args.get_arg('tx_if') - rx_if = args.get_arg('rx_if') - - rxq = RxQueue(rx_if) - txq = TxQueue(tx_if) - - tx_src_ip = "0.0.0.0" - tx_dst_ip = "255.255.255.255" - - server_ip = args.get_arg('server_ip') - proxy_ip = args.get_arg('proxy_ip') - client_mac = args.get_arg('client_mac') - - sent_packets = [] - - dhcp_discover = Ether(src=client_mac, dst="ff:ff:ff:ff:ff:ff") / \ - IP(src=tx_src_ip, dst=tx_dst_ip) / \ - UDP(sport=68, dport=67) / \ - BOOTP(op=1,) / \ - DHCP(options=[("message-type", "discover"), - "end"]) - - sent_packets.append(dhcp_discover) - txq.send(dhcp_discover) - - ether = rxq.recv(2) - - if ether is None: - raise RuntimeError('DHCP DISCOVER timeout') - - if ether[IP].src != proxy_ip: - raise RuntimeError("Source IP address error.") - print "Source IP address: OK." - - if ether[IP].dst != server_ip: - raise RuntimeError("Destination IP address error.") - print "Destination IP address: OK." - - if ether[UDP].dport != UDP_SERVICES.bootps: - raise RuntimeError("UDP destination port error.") - print "UDP destination port: OK." - - if ether[UDP].sport != UDP_SERVICES.bootpc: - raise RuntimeError("UDP source port error.") - print "UDP source port: OK." - - if ether[DHCP].options[1][0] != 'relay_agent_Information': # option 82 - raise RuntimeError("Relay agent information error.") - option_82 = ether[DHCP].options[1][1] - - if ether[DHCP].options[0][1] != 1: # 1 - DISCOVER message - raise RuntimeError("DHCP DISCOVER message error.") - print "DHCP DISCOVER message OK." - dhcp_offer(args, option_82) - - -def dhcp_offer(args, option_82): - """Send DHCP OFFER packet.""" - - rx_if = args.get_arg('tx_if') - tx_if = args.get_arg('rx_if') - - rxq = RxQueue(rx_if) - txq = TxQueue(tx_if) - - tx_dst_ip = "255.255.255.255" - server_ip = args.get_arg('server_ip') - server_mac = args.get_arg('server_mac') - client_ip = args.get_arg('client_ip') - proxy_ip = args.get_arg('proxy_ip') - - sent_packets = [] - - dhcp_offer = Ether(src=server_mac, dst="ff:ff:ff:ff:ff:ff") / \ - IP(src=server_ip, dst=tx_dst_ip) / \ - UDP(sport=67, dport=68) / \ - BOOTP(op=2, - yiaddr=client_ip, - siaddr=server_ip) / \ - DHCP(options= - [("message-type", "offer"), - ("server_id", server_ip), - ("relay_agent_Information", option_82), - "end"]) - - txq.send(dhcp_offer) - sent_packets.append(dhcp_offer) - - ether = rxq.recv(2) - - if ether is None: - raise RuntimeError('DHCP OFFER timeout') - - if ether[IP].dst != tx_dst_ip: - raise RuntimeError("Destination IP address error.") - print "Destination IP address: OK." - - if ether[IP].src != proxy_ip: - raise RuntimeError("Source IP address error.") - print "Source IP address: OK." - - if ether[UDP].dport != UDP_SERVICES.bootpc: - raise RuntimeError("UDP destination port error.") - print "UDP destination port: OK." - - if ether[UDP].sport != UDP_SERVICES.bootps: - raise RuntimeError("UDP source port error.") - print "UDP source port: OK." - - if ether[BOOTP].yiaddr != client_ip: - raise RuntimeError("Client IP address error.") - print "Client IP address: OK." - - if ether[BOOTP].siaddr != server_ip: - raise RuntimeError("DHCP server IP address error.") - print "DHCP server IP address: OK." - - if ether[DHCP].options[0][1] != 2: # 2 - OFFER message - raise RuntimeError("DHCP OFFER message error.") - print "DHCP OFFER message OK." - dhcp_request(args) - - -def dhcp_request(args): - """Send DHCP REQUEST packet.""" - - tx_if = args.get_arg('tx_if') - rx_if = args.get_arg('rx_if') - - rxq = RxQueue(rx_if) - txq = TxQueue(tx_if) - - tx_dst_ip = "255.255.255.255" - server_ip = args.get_arg('server_ip') - client_ip = args.get_arg('client_ip') - client_mac = args.get_arg('client_mac') - proxy_ip = args.get_arg('proxy_ip') - - sent_packets = [] - - dhcp_request = Ether(src=client_mac, dst="ff:ff:ff:ff:ff:ff") / \ - IP(src="0.0.0.0", dst=tx_dst_ip) / \ - UDP(sport=68, dport=67) / \ - BOOTP(op=1, - giaddr=proxy_ip, - siaddr=server_ip) / \ - DHCP(options=[("message-type", "request"), - ("server_id", server_ip), - ("requested_addr", client_ip), - "end"]) - - sent_packets.append(dhcp_request) - txq.send(dhcp_request) - - ether = rxq.recv(2) - - if ether is None: - raise RuntimeError('DHCP REQUEST timeout') - - if ether[IP].dst != server_ip: - raise RuntimeError("Destination IP address error.") - print "Destination IP address: OK." - - if ether[IP].src != proxy_ip: - raise RuntimeError("Source IP address error.") - print "Source IP address: OK." - - if ether[UDP].dport != UDP_SERVICES.bootps: - raise RuntimeError("UDP destination port error.") - print "UDP destination port: OK." - - if ether[UDP].sport != UDP_SERVICES.bootpc: - raise RuntimeError("UDP source port error.") - print "UDP source port: OK." - - if ether[BOOTP].siaddr != server_ip: - raise RuntimeError("DHCP server IP address error.") - print "DHCP server IP address: OK." - - if ether[DHCP].options[2][1] != client_ip: - raise RuntimeError("Requested IP address error.") - print "Requested IP address: OK." - - if ether[DHCP].options[3][0] != 'relay_agent_Information': # option 82 - raise RuntimeError("Relay agent information error.") - option_82 = ether[DHCP].options[3][1] - - if ether[DHCP].options[0][1] != 3: # 2 - REQUEST message - raise RuntimeError("DHCP REQUEST message error.") - print "DHCP REQUEST message: OK." - dhcp_ack(args, option_82) - - -def dhcp_ack(args, option_82): - """Send DHCP ACK packet.""" - - rx_if = args.get_arg('tx_if') - tx_if = args.get_arg('rx_if') - - rxq = RxQueue(rx_if) - txq = TxQueue(tx_if) - - tx_dst_ip = "255.255.255.255" - server_ip = args.get_arg('server_ip') - server_mac = args.get_arg('server_mac') - client_ip = args.get_arg('client_ip') - proxy_ip = args.get_arg('proxy_ip') - lease_time = 43200 # 12 hours - - sent_packets = [] - - dhcp_ack = Ether(src=server_mac, dst="ff:ff:ff:ff:ff:ff") / \ - IP(src=server_ip, dst=tx_dst_ip) / \ - UDP(sport=67, dport=68) / \ - BOOTP(op=2, - yiaddr=client_ip, - siaddr=server_ip) / \ - DHCP(options= - [("message-type", "ack"), - ("server_id", server_ip), - ("lease_time", lease_time), - ("relay_agent_Information", option_82), - "end"]) - - txq.send(dhcp_ack) - sent_packets.append(dhcp_ack) - - ether = rxq.recv(2) - - if ether is None: - raise RuntimeError('DHCP ACK timeout') - - if ether[IP].dst != tx_dst_ip: - raise RuntimeError("Destination IP address error.") - print "Destination IP address: OK." - - if ether[IP].src != proxy_ip: - raise RuntimeError("Source IP address error.") - print "Source IP address: OK." - - if ether[UDP].dport != UDP_SERVICES.bootpc: - raise RuntimeError("UDP destination port error.") - print "UDP destination port: OK." - - if ether[UDP].sport != UDP_SERVICES.bootps: - raise RuntimeError("UDP source port error.") - print "UDP source port: OK." - - if ether[BOOTP].yiaddr != client_ip: - raise RuntimeError("Client IP address error.") - print "Client IP address: OK." - - if ether[BOOTP].siaddr != server_ip: - raise RuntimeError("DHCP server IP address error.") - print "DHCP server IP address: OK." - - if ether[DHCP].options[2][1] != lease_time: - raise RuntimeError("DHCP lease time error.") - print "DHCP lease time OK." - - if ether[DHCP].options[0][1] != 5: # 5 - ACK message - raise RuntimeError("DHCP ACK message error.") - print "DHCP ACK message OK." - - -def main(): - """Send DHCP messages.""" - - args = TrafficScriptArg(['server_ip', 'server_mac', 'client_ip', - 'client_mac', 'proxy_ip']) - - dhcp_discover(args) - - sys.exit(0) - -if __name__ == "__main__": - main() -- cgit 1.2.3-korg