--- /dev/null
+#!/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()
Code Review / csit.git / blobdiff