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Diffstat (limited to 'resources/traffic_scripts/dhcp/send_dhcp_v6_messages.py')
| -rwxr-xr-x | resources/traffic_scripts/dhcp/send_dhcp_v6_messages.py | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/resources/traffic_scripts/dhcp/send_dhcp_v6_messages.py b/resources/traffic_scripts/dhcp/send_dhcp_v6_messages.py new file mode 100755 index 0000000000..d570a8c8aa --- /dev/null +++ b/resources/traffic_scripts/dhcp/send_dhcp_v6_messages.py @@ -0,0 +1,330 @@ +#!/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 DHCPv6 proxy packets.""" + +from scapy.layers.dhcp6 import * +from scapy.layers.inet6 import IPv6, UDP, UDP_SERVICES + +from resources.libraries.python.PacketVerifier import RxQueue, TxQueue +from resources.libraries.python.TrafficScriptArg import TrafficScriptArg + + +def _check_udp_checksum(pkt): + """Check udp checksum in ip packet. + Return true if checksum is correct.""" + new = pkt.__class__(str(pkt)) + del new['UDP'].chksum + new = new.__class__(str(new)) + return new['UDP'].chksum == pkt['UDP'].chksum + + +def dhcpv6_solicit(tx_if, rx_if, dhcp_multicast_ip, link_local_ip, proxy_ip, + server_ip, server_mac, client_duid, client_mac): + """Send and check DHCPv6 SOLICIT proxy packet. + + :param tx_if: Client interface. + :param rx_if: DHCPv6 server interface. + :param dhcp_multicast_ip: Servers and relay agents multicast address. + :param link_local_ip: Client link-local address. + :param proxy_ip: IP address of DHCPv6 proxy server. + :param server_ip: IP address of DHCPv6 server. + :param server_mac: MAC address of DHCPv6 server. + :param client_duid: Client DHCP Unique Identifier. + :param client_mac: Client MAC address. + :type tx_if: str + :type rx_if: str + :type dhcp_multicast_ip: str + :type link_local_ip: str + :type proxy_ip: str + :type server_ip: str + :type server_mac: str + :type client_duid: str + :type client_mac: str + :return interface_id: ID of proxy interface. + :rtype interface_id: str + """ + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + sent_packets = [] + + dhcp6_solicit_pkt = Ether(src=client_mac, dst="33:33:00:01:00:02") / \ + IPv6(src=link_local_ip, dst=dhcp_multicast_ip) / \ + UDP(sport=UDP_SERVICES.dhcpv6_client, + dport=UDP_SERVICES.dhcpv6_server) / \ + DHCP6_Solicit() / \ + DHCP6OptClientId(duid=client_duid) + + sent_packets.append(dhcp6_solicit_pkt) + txq.send(dhcp6_solicit_pkt) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCPv6 SOLICIT timeout') + + if ether.dst != server_mac: + raise RuntimeError("Destination MAC address error!") + print "Destination MAC address: OK." + + if ether['IPv6'].src != proxy_ip: + raise RuntimeError("Source IP address error!") + print "Source IP address: OK." + + if ether['IPv6'].dst != server_ip: + raise RuntimeError("Destination IP address error!") + print "Destination IP address: OK." + + if ether['IPv6']['UDP']\ + ['DHCPv6 Relay Forward Message (Relay Agent/Server Message)']: + print "Relay Agent/Server Message: OK." + else: + raise RuntimeError("Relay Agent/Server Message error.") + + if ether['IPv6']['UDP']\ + ['DHCPv6 Relay Forward Message (Relay Agent/Server Message)']\ + .linkaddr != proxy_ip: + raise RuntimeError("Proxy IP address error!") + print "Proxy IP address: OK." + + try: + interface_id = ether['IPv6']['UDP']\ + ['DHCPv6 Relay Forward Message (Relay Agent/Server Message)']\ + ['Unknown DHCPv6 OPtion']['DHCP6 Interface-Id Option'].ifaceid + except Exception: + raise RuntimeError("DHCP6 Interface-Id error!") + + return interface_id + + +def dhcpv6_advertise(rx_if, tx_if, link_local_ip, proxy_ip, + server_ip, server_mac, proxy_to_server_mac, interface_id): + """Send and check DHCPv6 ADVERTISE proxy packet. + + :param rx_if: DHCPv6 server interface. + :param tx_if: Client interface. + :param link_local_ip: Client link-local address. + :param proxy_ip: IP address of DHCPv6 proxy server. + :param server_ip: IP address of DHCPv6 server. + :param server_mac: MAC address of DHCPv6 server. + :param proxy_to_server_mac: MAC address of DHCPv6 proxy interface. + :param interface_id: ID of proxy interface. + :type rx_if: str + :type tx_if: str + :type link_local_ip: str + :type proxy_ip: str + :type server_ip: str + :type server_mac: str + :type proxy_to_server_mac: str + :type interface_id: str + """ + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + sent_packets = [] + + dhcp6_advertise_pkt = Ether(src=server_mac, dst=proxy_to_server_mac) / \ + IPv6(src=server_ip, dst=proxy_ip) / \ + UDP(sport=UDP_SERVICES.dhcpv6_server, + dport=UDP_SERVICES.dhcpv6_client) / \ + DHCP6_RelayReply(peeraddr=link_local_ip, + linkaddr=proxy_ip) / \ + DHCP6OptIfaceId(ifaceid=interface_id) / \ + DHCP6OptRelayMsg() / \ + DHCP6_Advertise() + + sent_packets.append(dhcp6_advertise_pkt) + txq.send(dhcp6_advertise_pkt) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCPv6 ADVERTISE timeout') + + if ether['IPv6'].src != proxy_ip: + raise RuntimeError("Source IP address error!") + print "Source IP address: OK." + + if not _check_udp_checksum(ether['IPv6']): + raise RuntimeError("Checksum error!") + print "Checksum: OK." + + if ether['IPv6']['UDP']['Raw'].load != interface_id: + raise RuntimeError("Interface ID error!") + print "Interface ID: OK." + + +def dhcpv6_request(tx_if, rx_if, dhcp_multicast_ip, link_local_ip, proxy_ip, + server_ip, client_duid, client_mac): + """Send and check DHCPv6 REQUEST proxy packet. + + :param tx_if: Client interface. + :param rx_if: DHCPv6 server interface. + :param dhcp_multicast_ip: Servers and relay agents multicast address. + :param link_local_ip: Client link-local address. + :param proxy_ip: IP address of DHCPv6 proxy server. + :param server_ip: IP address of DHCPv6 server. + :param client_duid: Client DHCP Unique Identifier. + :param client_mac: Client MAC address. + :type tx_if: str + :type rx_if: str + :type dhcp_multicast_ip: str + :type link_local_ip: str + :type proxy_ip: str + :type server_ip: str + :type client_duid: str + :type client_mac: str + """ + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + sent_packets = [] + + dhcp6_request_pkt = Ether(src=client_mac, dst="33:33:00:01:00:02") / \ + IPv6(src=link_local_ip, dst=dhcp_multicast_ip) / \ + UDP(sport=UDP_SERVICES.dhcpv6_client, + dport=UDP_SERVICES.dhcpv6_server) / \ + DHCP6_Request() / \ + DHCP6OptClientId(duid=client_duid) + + sent_packets.append(dhcp6_request_pkt) + txq.send(dhcp6_request_pkt) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCPv6 REQUEST timeout') + + if ether['IPv6'].src != proxy_ip: + raise RuntimeError("Source IP address error!") + print "Source IP address: OK." + + if ether['IPv6'].dst != server_ip: + raise RuntimeError("Destination IP address error!") + print "Destination IP address: OK." + + if ether['IPv6']['UDP']\ + ['DHCPv6 Relay Forward Message (Relay Agent/Server Message)']: + print "Relay Agent/Server Message: OK." + else: + raise RuntimeError("Relay Agent/Server Message error.") + + if ether['IPv6']['UDP']\ + ['DHCPv6 Relay Forward Message (Relay Agent/Server Message)']\ + .linkaddr != proxy_ip: + raise RuntimeError("Proxy IP address error!") + print "Proxy IP address: OK." + + +def dhcpv6_reply(rx_if, tx_if, link_local_ip, proxy_ip, server_ip, server_mac, + interface_id): + """Send and check DHCPv6 REPLY proxy packet. + + :param rx_if: DHCPv6 server interface. + :param tx_if: Client interface. + :param link_local_ip: Client link-local address. + :param proxy_ip: IP address of DHCPv6 proxy server. + :param server_ip: IP address of DHCPv6 server. + :param server_mac: MAC address of DHCPv6 server. + :param interface_id: ID of proxy interface. + :type rx_if: str + :type tx_if: str + :type link_local_ip: str + :type proxy_ip: str + :type server_ip: str + :type server_mac: str + :type interface_id: str + """ + + rxq = RxQueue(rx_if) + txq = TxQueue(tx_if) + + sent_packets = [] + + dhcp_reply_pkt = Ether(src=server_mac) / \ + IPv6(src=server_ip, dst=proxy_ip) / \ + UDP(sport=UDP_SERVICES.dhcpv6_server, + dport=UDP_SERVICES.dhcpv6_client) / \ + DHCP6_RelayReply(peeraddr=link_local_ip, + linkaddr=proxy_ip) / \ + DHCP6OptIfaceId(ifaceid=interface_id) / \ + DHCP6OptRelayMsg() / \ + DHCP6_Reply() + + sent_packets.append(dhcp_reply_pkt) + txq.send(dhcp_reply_pkt) + + ether = rxq.recv(2) + + if ether is None: + raise RuntimeError('DHCPv6 REPLY timeout') + + if ether['IPv6'].src != proxy_ip: + raise RuntimeError("Source IP address error!") + print "Source IP address: OK." + + if not _check_udp_checksum(ether['IPv6']): + raise RuntimeError("Checksum error!") + print "Checksum: OK." + + if ether['IPv6']['UDP']['Raw'].load != interface_id: + raise RuntimeError("Interface ID error!") + print "Interface ID: OK." + + +def main(): + """Send DHCPv6 proxy messages.""" + + args = TrafficScriptArg(['tx_src_ip', 'tx_dst_ip', 'proxy_ip', 'proxy_mac', + 'server_ip', 'client_mac', 'server_mac', + 'proxy_to_server_mac']) + + client_if = args.get_arg('tx_if') + server_if = args.get_arg('rx_if') + proxy_ip = args.get_arg('proxy_ip') + proxy_mac = args.get_arg('proxy_mac') + proxy_to_server_mac = args.get_arg('proxy_to_server_mac') + server_ip = args.get_arg('server_ip') + client_mac = args.get_arg('client_mac') + server_mac = args.get_arg('server_mac') + + link_local_ip = "fe80::1" + dhcp_multicast_ip = "ff02::1:2" + client_duid = str(random.randint(0, 9999)) + + # SOLICIT + interface_id = dhcpv6_solicit(client_if, server_if, dhcp_multicast_ip, + link_local_ip, proxy_ip, server_ip, + server_mac, client_duid, client_mac) + + # ADVERTISE + dhcpv6_advertise(client_if, server_if, link_local_ip, proxy_ip, + server_ip, server_mac, proxy_to_server_mac, interface_id) + + # REQUEST + dhcpv6_request(client_if, server_if, dhcp_multicast_ip, link_local_ip, + proxy_ip, server_ip, client_duid, client_mac) + + # REPLY + dhcpv6_reply(client_if, server_if, link_local_ip, proxy_ip, server_ip, + server_mac, interface_id) + + sys.exit(0) + +if __name__ == "__main__": + main() |