#!/usr/bin/env python import unittest import socket import struct from framework import VppTestCase, VppTestRunner, running_extended_tests from vpp_neighbor import VppNeighbor from vpp_ip_route import find_route, VppIpTable from util import mk_ll_addr from scapy.layers.l2 import Ether, getmacbyip, ARP from scapy.layers.inet import IP, UDP, ICMP from scapy.layers.inet6 import IPv6, in6_getnsmac from scapy.utils6 import in6_mactoifaceid from scapy.layers.dhcp import DHCP, BOOTP, DHCPTypes from scapy.layers.dhcp6 import DHCP6, DHCP6_Solicit, DHCP6_RelayForward, \ DHCP6_RelayReply, DHCP6_Advertise, DHCP6OptRelayMsg, DHCP6OptIfaceId, \ DHCP6OptStatusCode, DHCP6OptVSS, DHCP6OptClientLinkLayerAddr, DHCP6_Request from socket import AF_INET, AF_INET6 from scapy.utils import inet_pton, inet_ntop from scapy.utils6 import in6_ptop from vpp_papi import mac_pton DHCP4_CLIENT_PORT = 68 DHCP4_SERVER_PORT = 67 DHCP6_CLIENT_PORT = 547 DHCP6_SERVER_PORT = 546 class TestDHCP(VppTestCase): """ DHCP Test Case """ def setUp(self): super(TestDHCP, self).setUp() # create 6 pg interfaces for pg0 to pg5 self.create_pg_interfaces(range(6)) self.tables = [] # pg0 to 2 are IP configured in VRF 0, 1 and 2. # pg3 to 5 are non IP-configured in VRF 0, 1 and 2. table_id = 0 for table_id in range(1, 4): tbl4 = VppIpTable(self, table_id) tbl4.add_vpp_config() self.tables.append(tbl4) tbl6 = VppIpTable(self, table_id, is_ip6=1) tbl6.add_vpp_config() self.tables.append(tbl6) table_id = 0 for i in self.pg_interfaces[:3]: i.admin_up() i.set_table_ip4(table_id) i.set_table_ip6(table_id) i.config_ip4() i.resolve_arp() i.config_ip6() i.resolve_ndp() table_id += 1 table_id = 0 for i in self.pg_interfaces[3:]: i.admin_up() i.set_table_ip4(table_id) i.set_table_ip6(table_id) table_id += 1 def tearDown(self): for i in self.pg_interfaces[:3]: i.unconfig_ip4() i.unconfig_ip6() for i in self.pg_interfaces: i.set_table_ip4(0) i.set_table_ip6(0) i.admin_down() super(TestDHCP, self).tearDown() def verify_dhcp_has_option(self, pkt, option, value): dhcp = pkt[DHCP] found = False for i in dhcp.options: if type(i) is tuple: if i[0] == option: self.assertEqual(i[1], value) found = True self.assertTrue(found) def validate_relay_options(self, pkt, intf, ip_addr, vpn_id, fib_id, oui): dhcp = pkt[DHCP] found = 0 data = [] id_len = len(vpn_id) for i in dhcp.options: if type(i) is tuple: if i[0] == "relay_agent_Information": # # There are two sb-options present - each of length 6. # data = i[1] if oui != 0: self.assertEqual(len(data), 24) elif len(vpn_id) > 0: self.assertEqual(len(data), len(vpn_id)+17) else: self.assertEqual(len(data), 12) # # First sub-option is ID 1, len 4, then encoded # sw_if_index. This test uses low valued indicies # so [2:4] are 0. # The ID space is VPP internal - so no matching value # scapy # self.assertEqual(ord(data[0]), 1) self.assertEqual(ord(data[1]), 4) self.assertEqual(ord(data[2]), 0) self.assertEqual(ord(data[3]), 0) self.assertEqual(ord(data[4]), 0) self.assertEqual(ord(data[5]), intf._sw_if_index) # # next sub-option is the IP address of the client side # interface. # sub-option ID=5, length (of a v4 address)=4 # claddr = socket.inet_pton(AF_INET, ip_addr) self.assertEqual(ord(data[6]), 5) self.assertEqual(ord(data[7]), 4) self.assertEqual(data[8], claddr[0]) self.assertEqual(data[9], claddr[1]) self.assertEqual(data[10], claddr[2]) self.assertEqual(data[11], claddr[3]) if oui != 0: # sub-option 151 encodes vss_type 1, # the 3 byte oui and the 4 byte fib_id self.assertEqual(id_len, 0) self.assertEqual(ord(data[12]), 151) self.assertEqual(ord(data[13]), 8) self.assertEqual(ord(data[14]), 1) self.assertEqual(ord(data[15]), 0) self.assertEqual(ord(data[16]), 0) self.assertEqual(ord(data[17]), oui) self.assertEqual(ord(data[18]), 0) self.assertEqual(ord(data[19]), 0) self.assertEqual(ord(data[20]), 0) self.assertEqual(ord(data[21]), fib_id) # VSS control sub-option self.assertEqual(ord(data[22]), 152) self.assertEqual(ord(data[23]), 0) if id_len > 0: # sub-option 151 encode vss_type of 0 # followerd by vpn_id in ascii self.assertEqual(oui, 0) self.assertEqual(ord(data[12]), 151) self.assertEqual(ord(data[13]), id_len+1) sel
from vpp_object import VppObject
from vpp_interface import VppInterface


class VppBondInterface(VppInterface):
    """VPP bond interface."""

    def __init__(self, test, mode, lb=0,
                 use_custom_mac=0, mac_address=''):

        """ Create VPP Bond interface """
        super(VppBondInterface, self).__init__(test)
        self.mode = mode
        self.lb = lb
        self.use_custom_mac = use_custom_mac
        self.mac_address = mac_address

    def add_vpp_config(self):
        r = self.test.vapi.bond_create(self.mode,
                                       self.lb,
                                       self.use_custom_mac,
                                       self.mac_address)
        self.set_sw_if_index(r.sw_if_index)

    def remove_vpp_config(self):
        self.test.vapi.bond_delete(self.sw_if_index)

    def enslave_vpp_bond_interface(self,
                                   sw_if_index,
                                   is_passive,
                                   is_long_timeout):
        self.test.vapi.bond_enslave(sw_if_index,
                                    self.sw_if_index,
                                    is_passive,
                                    is_long_timeout)

    def detach_vpp_bond_interface(self,
                                  sw_if_index):
        self.test.vapi.bond_detach_slave(sw_if_index)

    def is_interface_config_in_dump(self, dump):
        for i in dump:
            if i.sw_if_index == self.sw_if_index:
                return True
        else:
            return False
elf.pg4.add_stream(pkts_disc_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) rx = rx[0] self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4, fib_id=1, oui=4) self.pg5.add_stream(pkts_disc_vrf2) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg2.get_capture(1) rx = rx[0] self.verify_relayed_dhcp_discover(rx, self.pg2, src_intf=self.pg5, vpn_id="ip4-table-2") # # Add a second DHCP server in VRF 1 # expect clients messages to be relay to both configured servers # self.pg1.generate_remote_hosts(2) server_addr12 = socket.inet_pton(AF_INET, self.pg1.remote_hosts[1].ip4) self.vapi.dhcp_proxy_config(server_addr12, src_addr1, rx_table_id=1, server_table_id=1, is_add=1) # # We'll need an ARP entry for the server to send it packets # arp_entry = VppNeighbor(self, self.pg1.sw_if_index, self.pg1.remote_hosts[1].mac, self.pg1.remote_hosts[1].ip4) arp_entry.add_vpp_config() # # Send a discover from the client. expect two relayed messages # The frist packet is sent to the second server # We're not enforcing that here, it's just the way it is. # self.pg4.add_stream(pkts_disc_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(2) option_82 = self.verify_relayed_dhcp_discover( rx[0], self.pg1, src_intf=self.pg4, dst_mac=self.pg1.remote_hosts[1].mac, dst_ip=self.pg1.remote_hosts[1].ip4, fib_id=1, oui=4) self.verify_relayed_dhcp_discover(rx[1], self.pg1, src_intf=self.pg4, fib_id=1, oui=4) # # Send both packets back. Client gets both. # p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / BOOTP(op=1) / DHCP(options=[('message-type', 'offer'), ('relay_agent_Information', option_82), ('end')])) p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_hosts[1].ip4, dst=self.pg1.local_ip4) / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / BOOTP(op=1) / DHCP(options=[('message-type', 'offer'), ('relay_agent_Information', option_82), ('end')])) pkts = [p1, p2] self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg4.get_capture(2) self.verify_dhcp_offer(rx[0], self.pg4, fib_id=1, oui=4) self.verify_dhcp_offer(rx[1], self.pg4, fib_id=1, oui=4) # # Ensure offers from non-servers are dropeed # p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src="8.8.8.8", dst=self.pg1.local_ip4) / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / BOOTP(op=1) / DHCP(options=[('message-type', 'offer'), ('relay_agent_Information', option_82), ('end')])) self.send_and_assert_no_replies(self.pg1, p2, "DHCP offer from non-server") # # Ensure only the discover is sent to multiple servers # p_req_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg4.remote_mac) / IP(src="0.0.0.0", dst="255.255.255.255") / UDP(sport=DHCP4_CLIENT_PORT, dport=DHCP4_SERVER_PORT) / BOOTP(op=1) / DHCP(options=[('message-type', 'request'), ('end')])) self.pg4.add_stream(p_req_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) # # Remove the second DHCP server # self.vapi.dhcp_proxy_config(server_addr12, src_addr1, rx_table_id=1, server_table_id=1, is_add=0) # # Test we can still relay with the first # self.pg4.add_stream(pkts_disc_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) rx = rx[0] self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4, fib_id=1, oui=4) # # Remove the VSS config # relayed DHCP has default vlaues in the option. # self.vapi.dhcp_proxy_set_vss(1, is_add=0) self.vapi.dhcp_proxy_set_vss(2, is_add=0) self.pg4.add_stream(pkts_disc_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) rx = rx[0] self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4) # # remove DHCP config to cleanup # self.vapi.dhcp_proxy_config(server_addr1, src_addr1, rx_table_id=1, server_table_id=1, is_add=0) self.vapi.dhcp_proxy_config(server_addr2, src_addr2, rx_table_id=2, server_table_id=2, is_add=0) self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0, "DHCP cleanup VRF 0") self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1, "DHCP cleanup VRF 1") self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2, "DHCP cleanup VRF 2") self.pg3.unconfig_ip4() self.pg4.unconfig_ip4() self.pg5.unconfig_ip4() def test_dhcp6_proxy(self): """ DHCPv6 Proxy""" # # Verify no response to DHCP request without DHCP config # dhcp_solicit_dst = "ff02::1:2" dhcp_solicit_src_vrf0 = mk_ll_addr(self.pg3.remote_mac) dhcp_solicit_src_vrf1 = mk_ll_addr(self.pg4.remote_mac) dhcp_solicit_src_vrf2 = mk_ll_addr(self.pg5.remote_mac) server_addr_vrf0 = self.pg0.remote_ip6n src_addr_vrf0 = self.pg0.local_ip6n server_addr_vrf1 = self.pg1.remote_ip6n src_addr_vrf1 = self.pg1.local_ip6n server_addr_vrf2 = self.pg2.remote_ip6n src_addr_vrf2 = self.pg2.local_ip6n dmac = in6_getnsmac(inet_pton(socket.AF_INET6, dhcp_solicit_dst)) p_solicit_vrf0 = (Ether(dst=dmac, src=self.pg3.remote_mac) / IPv6(src=dhcp_solicit_src_vrf0, dst=dhcp_solicit_dst) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_CLIENT_PORT) / DHCP6_Solicit()) p_solicit_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) / IPv6(src=dhcp_solicit_src_vrf1, dst=dhcp_solicit_dst) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_CLIENT_PORT) / DHCP6_Solicit()) p_solicit_vrf2 = (Ether(dst=dmac, src=self.pg5.remote_mac) / IPv6(src=dhcp_solicit_src_vrf2, dst=dhcp_solicit_dst) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_CLIENT_PORT) / DHCP6_Solicit()) self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0, "DHCP with no configuration") self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1, "DHCP with no configuration") self.send_and_assert_no_replies(self.pg5, p_solicit_vrf2, "DHCP with no configuration") # # DHCPv6 config in VRF 0. # Packets still dropped because the client facing interface has no # IPv6 config # self.vapi.dhcp_proxy_config(server_addr_vrf0, src_addr_vrf0, rx_table_id=0, server_table_id=0, is_ipv6=1) self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0, "DHCP with no configuration") self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1, "DHCP with no configuration") # # configure an IP address on the client facing interface # self.pg3.config_ip6() # # Now the DHCP requests are relayed to the server # self.pg3.add_stream(p_solicit_vrf0) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(1) self.verify_dhcp6_solicit(rx[0], self.pg0, dhcp_solicit_src_vrf0, self.pg3.remote_mac) # # Exception cases for rejected relay responses # # 1 - not a relay reply p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_Advertise()) self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, "DHCP6 not a relay reply") # 2 - no relay message option p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply() / DHCP6_Advertise()) self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, "DHCP not a relay message") # 3 - no circuit ID p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply() / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise()) self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, "DHCP6 no circuit ID") # 4 - wrong circuit ID p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply() / DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise()) self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, "DHCP6 wrong circuit ID") # # Send the relay response (the advertisement) # - no peer address p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply() / DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) / DHCP6OptStatusCode(statuscode=0)) pkts_adv_vrf0 = [p_adv_vrf0] self.pg0.add_stream(pkts_adv_vrf0) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg3.get_capture(1) self.verify_dhcp6_advert(rx[0], self.pg3, "::") # # Send the relay response (the advertisement) # - with peer address p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf0) / DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) / DHCP6OptStatusCode(statuscode=0)) pkts_adv_vrf0 = [p_adv_vrf0] self.pg0.add_stream(pkts_adv_vrf0) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg3.get_capture(1) self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf0) # # Add all the config for VRF 1 & 2 # self.vapi.dhcp_proxy_config(server_addr_vrf1, src_addr_vrf1, rx_table_id=1, server_table_id=1, is_ipv6=1) self.pg4.config_ip6() self.vapi.dhcp_proxy_config(server_addr_vrf2, src_addr_vrf2, rx_table_id=2, server_table_id=2, is_ipv6=1) self.pg5.config_ip6() # # VRF 1 solicit # self.pg4.add_stream(p_solicit_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1, self.pg4.remote_mac) # # VRF 2 solicit # self.pg5.add_stream(p_solicit_vrf2) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg2.get_capture(1) self.verify_dhcp6_solicit(rx[0], self.pg2, dhcp_solicit_src_vrf2, self.pg5.remote_mac) # # VRF 1 Advert # p_adv_vrf1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) / DHCP6OptStatusCode(statuscode=0)) pkts_adv_vrf1 = [p_adv_vrf1] self.pg1.add_stream(pkts_adv_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg4.get_capture(1) self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1) # # Add VSS config # table=1, vss_type=1, vpn_index=1, oui=4 # table=2, vss_type=0, vpn_id = "ip6-table-2" self.vapi.dhcp_proxy_set_vss(1, 1, oui=4, vpn_index=1, is_ip6=1) self.vapi.dhcp_proxy_set_vss(2, 0, "IPv6-table-2", is_ip6=1) self.pg4.add_stream(p_solicit_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1, self.pg4.remote_mac, fib_id=1, oui=4) self.pg5.add_stream(p_solicit_vrf2) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg2.get_capture(1) self.verify_dhcp6_solicit(rx[0], self.pg2, dhcp_solicit_src_vrf2, self.pg5.remote_mac, vpn_id="IPv6-table-2") # # Remove the VSS config # relayed DHCP has default vlaues in the option. # self.vapi.dhcp_proxy_set_vss(1, is_ip6=1, is_add=0) self.pg4.add_stream(p_solicit_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1, self.pg4.remote_mac) # # Add a second DHCP server in VRF 1 # expect clients messages to be relay to both configured servers # self.pg1.generate_remote_hosts(2) server_addr12 = socket.inet_pton(AF_INET6, self.pg1.remote_hosts[1].ip6) self.vapi.dhcp_proxy_config(server_addr12, src_addr_vrf1, rx_table_id=1, server_table_id=1, is_ipv6=1) # # We'll need an ND entry for the server to send it packets # nd_entry = VppNeighbor(self, self.pg1.sw_if_index, self.pg1.remote_hosts[1].mac, self.pg1.remote_hosts[1].ip6, af=AF_INET6) nd_entry.add_vpp_config() # # Send a discover from the client. expect two relayed messages # The frist packet is sent to the second server # We're not enforcing that here, it's just the way it is. # self.pg4.add_stream(p_solicit_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(2) self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1, self.pg4.remote_mac) self.verify_dhcp6_solicit(rx[1], self.pg1, dhcp_solicit_src_vrf1, self.pg4.remote_mac, dst_mac=self.pg1.remote_hosts[1].mac, dst_ip=self.pg1.remote_hosts[1].ip6) # # Send both packets back. Client gets both. # p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) / DHCP6OptStatusCode(statuscode=0)) p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) / IPv6(dst=self.pg1.local_ip6, src=self.pg1._remote_hosts[1].ip6) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) / DHCP6OptStatusCode(statuscode=0)) pkts = [p1, p2] self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg4.get_capture(2) self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1) self.verify_dhcp6_advert(rx[1], self.pg4, dhcp_solicit_src_vrf1) # # Ensure only solicit messages are duplicated # p_request_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) / IPv6(src=dhcp_solicit_src_vrf1, dst=dhcp_solicit_dst) / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_CLIENT_PORT) / DHCP6_Request()) self.pg4.add_stream(p_request_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) # # Test we drop DHCP packets from addresses that are not configured as # DHCP servers # p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) / IPv6(dst=self.pg1.local_ip6, src="3001::1") / UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) / DHCP6OptStatusCode(statuscode=0)) self.send_and_assert_no_replies(self.pg1, p2, "DHCP6 not from server") # # Remove the second DHCP server # self.vapi.dhcp_proxy_config(server_addr12, src_addr_vrf1, rx_table_id=1, server_table_id=1, is_ipv6=1, is_add=0) # # Test we can still relay with the first # self.pg4.add_stream(p_solicit_vrf1) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1, self.pg4.remote_mac) # # Cleanup # self.vapi.dhcp_proxy_config(server_addr_vrf2, src_addr_vrf2, rx_table_id=2, server_table_id=2, is_ipv6=1, is_add=0) self.vapi.dhcp_proxy_config(server_addr_vrf1, src_addr_vrf1, rx_table_id=1, server_table_id=1, is_ipv6=1, is_add=0) self.vapi.dhcp_proxy_config(server_addr_vrf0, src_addr_vrf0, rx_table_id=0, server_table_id=0, is_ipv6=1, is_add=0) # duplicate delete self.vapi.dhcp_proxy_config(server_addr_vrf0, src_addr_vrf0, rx_table_id=0, server_table_id=0, is_ipv6=1, is_add=0) self.pg3.unconfig_ip6() self.pg4.unconfig_ip6() self.pg5.unconfig_ip6() def test_dhcp_client(self): """ DHCP Client""" hostname = 'universal-dp' self.pg_enable_capture(self.pg_interfaces) # # Configure DHCP client on PG3 and capture the discover sent # self.vapi.dhcp_client(self.pg3.sw_if_index, hostname) rx = self.pg3.get_capture(1) self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname) # # Send back on offer, expect the request # p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / IP(src=self.pg3.remote_ip4, dst="255.255.255.255") / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / BOOTP(op=1, yiaddr=self.pg3.local_ip4, chaddr=mac_pton(self.pg3.local_mac)) / DHCP(options=[('message-type', 'offer'), ('server_id', self.pg3.remote_ip4), 'end'])) self.pg3.add_stream(p_offer) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg3.get_capture(1) self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, self.pg3.local_ip4) # # Send an acknowledgment # p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / IP(src=self.pg3.remote_ip4, dst="255.255.255.255") / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / BOOTP(op=1, yiaddr=self.pg3.local_ip4, chaddr=mac_pton(self.pg3.local_mac)) / DHCP(options=[('message-type', 'ack'), ('subnet_mask', "255.255.255.0"), ('router', self.pg3.remote_ip4), ('server_id', self.pg3.remote_ip4), ('lease_time', 43200), 'end'])) self.pg3.add_stream(p_ack) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # # We'll get an ARP request for the router address # rx = self.pg3.get_capture(1) self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) self.pg_enable_capture(self.pg_interfaces) # # At the end of this procedure there should be a connected route # in the FIB # self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) # remove the left over ARP entry self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index, mac_pton(self.pg3.remote_mac), self.pg3.remote_ip4, is_add=0) # # remove the DHCP config # self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) # # and now the route should be gone # self.assertFalse(find_route(self, self.pg3.local_ip4, 32)) self.assertFalse(find_route(self, self.pg3.local_ip4, 24)) # # Start the procedure again. this time have VPP send the client-ID # self.pg3.admin_down() self.sleep(1) self.pg3.admin_up() self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, client_id=self.pg3.local_mac) rx = self.pg3.get_capture(1) self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname, self.pg3.local_mac) # TODO: VPP DHCP client should not accept DHCP OFFER message with # the XID (Transaction ID) not matching the XID of the most recent # DHCP DISCOVERY message. # Such DHCP OFFER message must be silently discarded - RFC2131. # Reported in Jira ticket: VPP-99 self.pg3.add_stream(p_offer) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg3.get_capture(1) self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, self.pg3.local_ip4) # # unicast the ack to the offered address # p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / BOOTP(op=1, yiaddr=self.pg3.local_ip4, chaddr=mac_pton(self.pg3.local_mac)) / DHCP(options=[('message-type', 'ack'), ('subnet_mask', "255.255.255.0"), ('router', self.pg3.remote_ip4), ('server_id', self.pg3.remote_ip4), ('lease_time', 43200), 'end'])) self.pg3.add_stream(p_ack) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # # We'll get an ARP request for the router address # rx = self.pg3.get_capture(1) self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) self.pg_enable_capture(self.pg_interfaces) # # At the end of this procedure there should be a connected route # in the FIB # self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) # # remove the DHCP config # self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) self.assertFalse(find_route(self, self.pg3.local_ip4, 32)) self.assertFalse(find_route(self, self.pg3.local_ip4, 24)) # # Rince and repeat, this time with VPP configured not to set # the braodcast flag in the discover and request messages, # and for the server to unicast the responses. # # Configure DHCP client on PG3 and capture the discover sent # self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, set_broadcast_flag=0) rx = self.pg3.get_capture(1) self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname, broadcast=0) # # Send back on offer, unicasted to the offered address. # Expect the request. # p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / BOOTP(op=1, yiaddr=self.pg3.local_ip4, chaddr=mac_pton(self.pg3.local_mac)) / DHCP(options=[('message-type', 'offer'), ('server_id', self.pg3.remote_ip4), 'end'])) self.pg3.add_stream(p_offer) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg3.get_capture(1) self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, self.pg3.local_ip4, broadcast=0) # # Send an acknowledgment # p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / BOOTP(op=1, yiaddr=self.pg3.local_ip4, chaddr=mac_pton(self.pg3.local_mac)) / DHCP(options=[('message-type', 'ack'), ('subnet_mask', "255.255.255.0"), ('router', self.pg3.remote_ip4), ('server_id', self.pg3.remote_ip4), ('lease_time', 43200), 'end'])) self.pg3.add_stream(p_ack) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # # We'll get an ARP request for the router address # rx = self.pg3.get_capture(1) self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) self.pg_enable_capture(self.pg_interfaces) # # At the end of this procedure there should be a connected route # in the FIB # self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) # remove the left over ARP entry self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index, mac_pton(self.pg3.remote_mac), self.pg3.remote_ip4, is_add=0) # # read the DHCP client details from a dump # clients = self.vapi.dhcp_client_dump() self.assertEqual(clients[0].client.sw_if_index, self.pg3.sw_if_index) self.assertEqual(clients[0].lease.sw_if_index, self.pg3.sw_if_index) self.assertEqual(clients[0].client.hostname.rstrip('\0'), hostname) self.assertEqual(clients[0].lease.hostname.rstrip('\0'), hostname) self.assertEqual(clients[0].lease.is_ipv6, 0) # 0 = DISCOVER, 1 = REQUEST, 2 = BOUND self.assertEqual(clients[0].lease.state, 2) self.assertEqual(clients[0].lease.mask_width, 24) self.assertEqual(clients[0].lease.router_address.rstrip('\0'), self.pg3.remote_ip4n) self.assertEqual(clients[0].lease.host_address.rstrip('\0'), self.pg3.local_ip4n) # # remove the DHCP config # self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) # # and now the route should be gone # self.assertFalse(find_route(self, self.pg3.local_ip4, 32)) self.assertFalse(find_route(self, self.pg3.local_ip4, 24)) # # Start the procedure again. Use requested lease time option. # self.pg3.admin_down() self.sleep(1) self.pg3.admin_up() self.vapi.dhcp_client(self.pg3.sw_if_index, hostname) rx = self.pg3.get_capture(1) self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname) # # Send back on offer with requested lease time, expect the request # lease_time = 1 p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / IP(src=self.pg3.remote_ip4, dst='255.255.255.255') / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / BOOTP(op=1, yiaddr=self.pg3.local_ip4, chaddr=mac_pton(self.pg3.local_mac)) / DHCP(options=[('message-type', 'offer'), ('server_id', self.pg3.remote_ip4), ('lease_time', lease_time), 'end'])) self.pg3.add_stream(p_offer) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg3.get_capture(1) self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, self.pg3.local_ip4) # # Send an acknowledgment # p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / IP(src=self.pg3.remote_ip4, dst='255.255.255.255') / UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / BOOTP(op=1, yiaddr=self.pg3.local_ip4, chaddr=mac_pton(self.pg3.local_mac)) / DHCP(options=[('message-type', 'ack'), ('subnet_mask', '255.255.255.0'), ('router', self.pg3.remote_ip4), ('server_id', self.pg3.remote_ip4), ('lease_time', lease_time), 'end'])) self.pg3.add_stream(p_ack) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # # We'll get an ARP request for the router address # rx = self.pg3.get_capture(1) self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) # # At the end of this procedure there should be a connected route # in the FIB # self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) # remove the left over ARP entry self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index, mac_pton(self.pg3.remote_mac), self.pg3.remote_ip4, is_add=0) # # Sleep for the lease time # self.sleep(lease_time+1) # # And now the route should be gone # self.assertFalse(find_route(self, self.pg3.local_ip4, 32)) self.assertFalse(find_route(self, self.pg3.local_ip4, 24)) # # remove the DHCP config # self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)