+++ /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(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()
Code Review / csit.git / blobdiff