--- /dev/null
+#!/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
+import scapy.compat
+from scapy.layers.l2 import Ether, getmacbyip, ARP, Dot1Q
+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, VppEnum
+from vpp_sub_interface import VppDot1QSubint
+from vpp_qos import VppQosEgressMap, VppQosMark
+from vpp_dhcp import VppDHCPClient, VppDHCPProxy
+
+
+DHCP4_CLIENT_PORT = 68
+DHCP4_SERVER_PORT = 67
+DHCP6_CLIENT_PORT = 547
+DHCP6_SERVER_PORT = 546
+
+
+class TestDHCP(VppTestCase):
+ """ DHCP Test Case """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestDHCP, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestDHCP, cls).tearDownClass()
+
+ 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 isinstance(i, 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 isinstance(i, 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)
+ self.assertEqual(ord(data[14]), 0)
+ self.assertEqual(data[15:15 + id_len], vpn_id)
+
+ # VSS control sub-option
+ self.assertEqual(ord(data[15 + len(vpn_id)]), 152)
+ self.assertEqual(ord(data[16 + len(vpn_id)]), 0)
+
+ found = 1
+ self.assertTrue(found)
+
+ return data
+
+ def verify_dhcp_msg_type(self, pkt, name):
+ dhcp = pkt[DHCP]
+ found = False
+ for o in dhcp.options:
+ if isinstance(o, tuple):
+ if o[0] == "message-type" \
+ and DHCPTypes[o[1]] == name:
+ found = True
+ self.assertTrue(found)
+
+ def verify_dhcp_offer(self, pkt, intf, vpn_id="", fib_id=0, oui=0):
+ ether = pkt[Ether]
+ self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IP]
+ self.assertEqual(ip.dst, "255.255.255.255")
+ self.assertEqual(ip.src, intf.local_ip4)
+
+ udp = pkt[UDP]
+ self.assertEqual(udp.dport, DHCP4_CLIENT_PORT)
+ self.assertEqual(udp.sport, DHCP4_SERVER_PORT)
+
+ self.verify_dhcp_msg_type(pkt, "offer")
+ data = self.validate_relay_options(pkt, intf, intf.local_ip4,
+ vpn_id, fib_id, oui)
+
+ def verify_orig_dhcp_pkt(self, pkt, intf, dscp, l2_bc=True):
+ ether = pkt[Ether]
+ if l2_bc:
+ self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
+ else:
+ self.assertEqual(ether.dst, intf.remote_mac)
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IP]
+
+ if (l2_bc):
+ self.assertEqual(ip.dst, "255.255.255.255")
+ self.assertEqual(ip.src, "0.0.0.0")
+ else:
+ self.assertEqual(ip.dst, intf.remote_ip4)
+ self.assertEqual(ip.src, intf.local_ip4)
+ self.assertEqual(ip.tos, dscp)
+
+ udp = pkt[UDP]
+ self.assertEqual(udp.dport, DHCP4_SERVER_PORT)
+ self.assertEqual(udp.sport, DHCP4_CLIENT_PORT)
+
+ def verify_orig_dhcp_discover(self, pkt, intf, hostname, client_id=None,
+ broadcast=True, dscp=0):
+ self.verify_orig_dhcp_pkt(pkt, intf, dscp)
+
+ self.verify_dhcp_msg_type(pkt, "discover")
+ self.verify_dhcp_has_option(pkt, "hostname", hostname)
+ if client_id:
+ self.verify_dhcp_has_option(pkt, "client_id", client_id)
+ bootp = pkt[BOOTP]
+ self.assertEqual(bootp.ciaddr, "0.0.0.0")
+ self.assertEqual(bootp.giaddr, "0.0.0.0")
+ if broadcast:
+ self.assertEqual(bootp.flags, 0x8000)
+ else:
+ self.assertEqual(bootp.flags, 0x0000)
+
+ def verify_orig_dhcp_request(self, pkt, intf, hostname, ip,
+ broadcast=True,
+ l2_bc=True,
+ dscp=0):
+ self.verify_orig_dhcp_pkt(pkt, intf, dscp, l2_bc=l2_bc)
+
+ self.verify_dhcp_msg_type(pkt, "request")
+ self.verify_dhcp_has_option(pkt, "hostname", hostname)
+ self.verify_dhcp_has_option(pkt, "requested_addr", ip)
+ bootp = pkt[BOOTP]
+
+ if l2_bc:
+ self.assertEqual(bootp.ciaddr, "0.0.0.0")
+ else:
+ self.assertEqual(bootp.ciaddr, intf.local_ip4)
+ self.assertEqual(bootp.giaddr, "0.0.0.0")
+
+ if broadcast:
+ self.assertEqual(bootp.flags, 0x8000)
+ else:
+ self.assertEqual(bootp.flags, 0x0000)
+
+ def verify_relayed_dhcp_discover(self, pkt, intf, src_intf=None,
+ fib_id=0, oui=0,
+ vpn_id="",
+ dst_mac=None, dst_ip=None):
+ if not dst_mac:
+ dst_mac = intf.remote_mac
+ if not dst_ip:
+ dst_ip = intf.remote_ip4
+
+ ether = pkt[Ether]
+ self.assertEqual(ether.dst, dst_mac)
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IP]
+ self.assertEqual(ip.dst, dst_ip)
+ self.assertEqual(ip.src, intf.local_ip4)
+
+ udp = pkt[UDP]
+ self.assertEqual(udp.dport, DHCP4_SERVER_PORT)
+ self.assertEqual(udp.sport, DHCP4_CLIENT_PORT)
+
+ dhcp = pkt[DHCP]
+
+ is_discover = False
+ for o in dhcp.options:
+ if isinstance(o, tuple):
+ if o[0] == "message-type" \
+ and DHCPTypes[o[1]] == "discover":
+ is_discover = True
+ self.assertTrue(is_discover)
+
+ data = self.validate_relay_options(pkt, src_intf,
+ src_intf.local_ip4,
+ vpn_id,
+ fib_id, oui)
+ return data
+
+ def verify_dhcp6_solicit(self, pkt, intf,
+ peer_ip, peer_mac,
+ vpn_id="",
+ fib_id=0,
+ oui=0,
+ dst_mac=None,
+ dst_ip=None):
+ if not dst_mac:
+ dst_mac = intf.remote_mac
+ if not dst_ip:
+ dst_ip = in6_ptop(intf.remote_ip6)
+
+ ether = pkt[Ether]
+ self.assertEqual(ether.dst, dst_mac)
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IPv6]
+ self.assertEqual(in6_ptop(ip.dst), dst_ip)
+ self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6))
+
+ udp = pkt[UDP]
+ self.assertEqual(udp.dport, DHCP6_CLIENT_PORT)
+ self.assertEqual(udp.sport, DHCP6_SERVER_PORT)
+
+ relay = pkt[DHCP6_RelayForward]
+ self.assertEqual(in6_ptop(relay.peeraddr), in6_ptop(peer_ip))
+ oid = pkt[DHCP6OptIfaceId]
+ cll = pkt[DHCP6OptClientLinkLayerAddr]
+ self.assertEqual(cll.optlen, 8)
+ self.assertEqual(cll.lltype, 1)
+ self.assertEqual(cll.clladdr, peer_mac)
+
+ id_len = len(vpn_id)
+
+ if fib_id != 0:
+ self.assertEqual(id_len, 0)
+ vss = pkt[DHCP6OptVSS]
+ self.assertEqual(vss.optlen, 8)
+ self.assertEqual(vss.type, 1)
+ # the OUI and FIB-id are really 3 and 4 bytes resp.
+ # but the tested range is small
+ self.assertEqual(ord(vss.data[0]), 0)
+ self.assertEqual(ord(vss.data[1]), 0)
+ self.assertEqual(ord(vss.data[2]), oui)
+ self.assertEqual(ord(vss.data[3]), 0)
+ self.assertEqual(ord(vss.data[4]), 0)
+ self.assertEqual(ord(vss.data[5]), 0)
+ self.assertEqual(ord(vss.data[6]), fib_id)
+
+ if id_len > 0:
+ self.assertEqual(oui, 0)
+ vss = pkt[DHCP6OptVSS]
+ self.assertEqual(vss.optlen, id_len + 1)
+ self.assertEqual(vss.type, 0)
+ self.assertEqual(vss.data[0:id_len], vpn_id)
+
+ # the relay message should be an encoded Solicit
+ msg = pkt[DHCP6OptRelayMsg]
+ sol = DHCP6_Solicit()
+ self.assertEqual(msg.optlen, len(str(sol)))
+ self.assertEqual(str(sol), (str(msg[1]))[:msg.optlen])
+
+ def verify_dhcp6_advert(self, pkt, intf, peer):
+ ether = pkt[Ether]
+ self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IPv6]
+ self.assertEqual(in6_ptop(ip.dst), in6_ptop(peer))
+ self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6))
+
+ udp = pkt[UDP]
+ self.assertEqual(udp.dport, DHCP6_SERVER_PORT)
+ self.assertEqual(udp.sport, DHCP6_CLIENT_PORT)
+
+ # not sure why this is not decoding
+ # adv = pkt[DHCP6_Advertise]
+
+ def wait_for_no_route(self, address, length,
+ n_tries=50, s_time=1):
+ while (n_tries):
+ if not find_route(self, address, length):
+ return True
+ n_tries = n_tries - 1
+ self.sleep(s_time)
+
+ return False
+
+ def test_dhcp_proxy(self):
+ """ DHCPv4 Proxy """
+
+ #
+ # Verify no response to DHCP request without DHCP config
+ #
+ p_disc_vrf0 = (Ether(dst="ff:ff:ff:ff:ff:ff",
+ src=self.pg3.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', 'discover'), ('end')]))
+ pkts_disc_vrf0 = [p_disc_vrf0]
+ p_disc_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', 'discover'), ('end')]))
+ pkts_disc_vrf1 = [p_disc_vrf1]
+ p_disc_vrf2 = (Ether(dst="ff:ff:ff:ff:ff:ff",
+ src=self.pg5.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', 'discover'), ('end')]))
+ pkts_disc_vrf2 = [p_disc_vrf2]
+
+ self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
+ "DHCP with no configuration")
+ self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
+ "DHCP with no configuration")
+ self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
+ "DHCP with no configuration")
+
+ #
+ # Enable DHCP proxy in VRF 0
+ #
+ server_addr = self.pg0.remote_ip4
+ src_addr = self.pg0.local_ip4
+
+ Proxy = VppDHCPProxy(self, server_addr, src_addr, rx_vrf_id=0)
+ Proxy.add_vpp_config()
+
+ #
+ # Discover packets from the client are dropped because there is no
+ # IP address configured on the client facing interface
+ #
+ self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
+ "Discover DHCP no relay address")
+
+ #
+ # Inject a response from the server
+ # dropped, because there is no IP addrees on the
+ # client interfce to fill in the option.
+ #
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
+ BOOTP(op=1) /
+ DHCP(options=[('message-type', 'offer'), ('end')]))
+ pkts = [p]
+
+ self.send_and_assert_no_replies(self.pg3, pkts,
+ "Offer DHCP no relay address")
+
+ #
+ # configure an IP address on the client facing interface
+ #
+ self.pg3.config_ip4()
+
+ #
+ # Try again with a discover packet
+ # Rx'd packet should be to the server address and from the configured
+ # source address
+ # UDP source ports are unchanged
+ # we've no option 82 config so that should be absent
+ #
+ self.pg3.add_stream(pkts_disc_vrf0)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg0.get_capture(1)
+ rx = rx[0]
+
+ option_82 = self.verify_relayed_dhcp_discover(rx, self.pg0,
+ src_intf=self.pg3)
+
+ #
+ # Create an DHCP offer reply from the server with a correctly formatted
+ # option 82. i.e. send back what we just captured
+ # The offer, sent mcast to the client, still has option 82.
+ #
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg0.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 = [p]
+
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg3.get_capture(1)
+ rx = rx[0]
+
+ self.verify_dhcp_offer(rx, self.pg3)
+
+ #
+ # Bogus Option 82:
+ #
+ # 1. not our IP address = not checked by VPP? so offer is replayed
+ # to client
+ bad_ip = option_82[0:8] + scapy.compat.chb(33) + option_82[9:]
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
+ BOOTP(op=1) /
+ DHCP(options=[('message-type', 'offer'),
+ ('relay_agent_Information', bad_ip),
+ ('end')]))
+ pkts = [p]
+ self.send_and_assert_no_replies(self.pg0, pkts,
+ "DHCP offer option 82 bad address")
+
+ # 2. Not a sw_if_index VPP knows
+ bad_if_index = option_82[0:2] + scapy.compat.chb(33) + option_82[3:]
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
+ BOOTP(op=1) /
+ DHCP(options=[('message-type', 'offer'),
+ ('relay_agent_Information', bad_if_index),
+ ('end')]))
+ pkts = [p]
+ self.send_and_assert_no_replies(self.pg0, pkts,
+ "DHCP offer option 82 bad if index")
+
+ #
+ # Send a DHCP request in VRF 1. should be dropped.
+ #
+ self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
+ "DHCP with no configuration VRF 1")
+
+ #
+ # Delete the DHCP config in VRF 0
+ # Should now drop requests.
+ #
+ Proxy.remove_vpp_config()
+
+ self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
+ "DHCP config removed VRF 0")
+ self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
+ "DHCP config removed VRF 1")
+
+ #
+ # Add DHCP config for VRF 1 & 2
+ #
+ server_addr1 = self.pg1.remote_ip4
+ src_addr1 = self.pg1.local_ip4
+ Proxy1 = VppDHCPProxy(
+ self,
+ server_addr1,
+ src_addr1,
+ rx_vrf_id=1,
+ server_vrf_id=1)
+ Proxy1.add_vpp_config()
+
+ server_addr2 = self.pg2.remote_ip4
+ src_addr2 = self.pg2.local_ip4
+ Proxy2 = VppDHCPProxy(
+ self,
+ server_addr2,
+ src_addr2,
+ rx_vrf_id=2,
+ server_vrf_id=2)
+ Proxy2.add_vpp_config()
+
+ #
+ # Confim DHCP requests ok in VRF 1 & 2.
+ # - dropped on IP config on client interface
+ #
+ self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
+ "DHCP config removed VRF 1")
+ self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
+ "DHCP config removed VRF 2")
+
+ #
+ # configure an IP address on the client facing interface
+ #
+ self.pg4.config_ip4()
+ 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)
+
+ self.pg5.config_ip4()
+ 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)
+
+ #
+ # Add VSS config
+ # table=1, vss_type=1, vpn_index=1, oui=4
+ # table=2, vss_type=0, vpn_id = "ip4-table-2"
+ self.vapi.dhcp_proxy_set_vss(tbl_id=1, vss_type=1,
+ vpn_index=1, oui=4, is_add=1)
+ self.vapi.dhcp_proxy_set_vss(tbl_id=2, vss_type=0,
+ vpn_ascii_id="ip4-table-2", is_add=1)
+
+ 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)
+
+ 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 = self.pg1.remote_hosts[1].ip4
+
+ Proxy12 = VppDHCPProxy(
+ self,
+ server_addr12,
+ src_addr,
+ rx_vrf_id=1,
+ server_vrf_id=1)
+ Proxy12.add_vpp_config()
+
+ #
+ # 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
+ #
+ Proxy12.remove_vpp_config()
+
+ #
+ # 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(tbl_id=1, is_add=0)
+ self.vapi.dhcp_proxy_set_vss(tbl_id=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
+ #
+ Proxy1.remove_vpp_config()
+ Proxy2.remove_vpp_config()
+
+ 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_ip6
+ src_addr_vrf0 = self.pg0.local_ip6
+ server_addr_vrf1 = self.pg1.remote_ip6
+ src_addr_vrf1 = self.pg1.local_ip6
+ server_addr_vrf2 = self.pg2.remote_ip6
+ src_addr_vrf2 = self.pg2.local_ip6
+
+ 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
+ #
+ Proxy = VppDHCPProxy(
+ self,
+ server_addr_vrf0,
+ src_addr_vrf0,
+ rx_vrf_id=0,
+ server_vrf_id=0)
+ Proxy.add_vpp_config()
+
+ 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
+ #
+ Proxy1 = VppDHCPProxy(
+ self,
+ server_addr_vrf1,
+ src_addr_vrf1,
+ rx_vrf_id=1,
+ server_vrf_id=1)
+ Proxy1.add_vpp_config()
+ self.pg4.config_ip6()
+
+ Proxy2 = VppDHCPProxy(
+ self,
+ server_addr_vrf2,
+ src_addr_vrf2,
+ rx_vrf_id=2,
+ server_vrf_id=2)
+ Proxy2.add_vpp_config()
+ 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
+ #
+ self.vapi.dhcp_proxy_set_vss(
+ tbl_id=1, vss_type=1, oui=4, vpn_index=1, is_ipv6=1, is_add=1)
+ self.vapi.dhcp_proxy_set_vss(
+ tbl_id=2,
+ vss_type=0,
+ vpn_ascii_id="IPv6-table-2",
+ is_ipv6=1,
+ is_add=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(tbl_id=1, is_ipv6=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 = self.pg1.remote_hosts[1].ip6
+
+ Proxy12 = VppDHCPProxy(
+ self,
+ server_addr12,
+ src_addr_vrf1,
+ rx_vrf_id=1,
+ server_vrf_id=1)
+ Proxy12.add_vpp_config()
+
+ #
+ # 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)
+ 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
+ #
+ Proxy12.remove_vpp_config()
+
+ #
+ # 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
+ #
+ Proxy.remove_vpp_config()
+ Proxy1.remove_vpp_config()
+ Proxy2.remove_vpp_config()
+
+ self.pg3.unconfig_ip6()
+ self.pg4.unconfig_ip6()
+ self.pg5.unconfig_ip6()
+
+ def test_dhcp_client(self):
+ """ DHCP Client"""
+
+ vdscp = VppEnum.vl_api_ip_dscp_t
+ hostname = 'universal-dp'
+
+ self.pg_enable_capture(self.pg_interfaces)
+
+ #
+ # Configure DHCP client on PG3 and capture the discover sent
+ #
+ Client = VppDHCPClient(self, self.pg3.sw_if_index, hostname)
+ Client.add_vpp_config()
+ self.assertTrue(Client.query_vpp_config())
+
+ 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,
+ self.pg3.remote_mac,
+ self.pg3.remote_ip4,
+ is_add=0)
+
+ #
+ # remove the DHCP config
+ #
+ Client.remove_vpp_config()
+
+ #
+ # 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
+ # and set the DSCP value
+ #
+ self.pg3.admin_down()
+ self.sleep(1)
+ self.pg3.admin_up()
+ Client.set_client(self.pg3.sw_if_index, hostname,
+ id=self.pg3.local_mac,
+ dscp=vdscp.IP_API_DSCP_EF)
+ Client.add_vpp_config()
+
+ rx = self.pg3.get_capture(1)
+
+ self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
+ self.pg3.local_mac,
+ dscp=vdscp.IP_API_DSCP_EF)
+
+ # 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,
+ dscp=vdscp.IP_API_DSCP_EF)
+
+ #
+ # 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
+ #
+ Client.remove_vpp_config()
+
+ 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
+ #
+ Client.set_client(
+ self.pg3.sw_if_index,
+ hostname,
+ set_broadcast_flag=False)
+ Client.add_vpp_config()
+
+ rx = self.pg3.get_capture(1)
+
+ self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
+ broadcast=False)
+
+ #
+ # 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=False)
+
+ #
+ # Send an acknowledgment, the lease renewal time is 2 seconds
+ # so we should expect the renew straight after
+ #
+ 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),
+ ('renewal_time', 2),
+ '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))
+
+ #
+ # wait for the unicasted renewal
+ # the first attempt will be an ARP packet, since we have not yet
+ # responded to VPP's request
+ #
+ self.logger.info(self.vapi.cli("sh dhcp client intfc pg3 verbose"))
+ rx = self.pg3.get_capture(1, timeout=10)
+
+ self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
+
+ # respond to the arp
+ p_arp = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
+ ARP(op="is-at",
+ hwdst=self.pg3.local_mac,
+ hwsrc=self.pg3.remote_mac,
+ pdst=self.pg3.local_ip4,
+ psrc=self.pg3.remote_ip4))
+ self.pg3.add_stream(p_arp)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # the next packet is the unicasted renewal
+ rx = self.pg3.get_capture(1, timeout=10)
+ self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
+ self.pg3.local_ip4,
+ l2_bc=False,
+ broadcast=False)
+
+ #
+ # 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)
+ # 0 = DISCOVER, 1 = REQUEST, 2 = BOUND
+ self.assertEqual(clients[0].lease.state, 2)
+ self.assertEqual(clients[0].lease.mask_width, 24)
+ self.assertEqual(str(clients[0].lease.router_address),
+ self.pg3.remote_ip4)
+ self.assertEqual(str(clients[0].lease.host_address),
+ self.pg3.local_ip4)
+
+ # remove the left over ARP entry
+ self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index,
+ self.pg3.remote_mac,
+ self.pg3.remote_ip4,
+ is_add=0)
+
+ #
+ # remove the DHCP config
+ #
+ Client.remove_vpp_config()
+
+ #
+ # 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.
+ #
+ hostname += "-2"
+ self.pg3.admin_down()
+ self.sleep(1)
+ self.pg3.admin_up()
+ self.pg_enable_capture(self.pg_interfaces)
+ Client.set_client(self.pg3.sw_if_index, hostname)
+ Client.add_vpp_config()
+
+ 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,
+ self.pg3.remote_mac,
+ self.pg3.remote_ip4,
+ is_add=0)
+
+ #
+ # the route should be gone after the lease expires
+ #
+ self.assertTrue(self.wait_for_no_route(self.pg3.local_ip4, 32))
+ self.assertTrue(self.wait_for_no_route(self.pg3.local_ip4, 24))
+
+ #
+ # remove the DHCP config
+ #
+ Client.remove_vpp_config()
+
+ def test_dhcp_client_vlan(self):
+ """ DHCP Client w/ VLAN"""
+
+ vdscp = VppEnum.vl_api_ip_dscp_t
+ vqos = VppEnum.vl_api_qos_source_t
+ hostname = 'universal-dp'
+
+ self.pg_enable_capture(self.pg_interfaces)
+
+ vlan_100 = VppDot1QSubint(self, self.pg3, 100)
+ vlan_100.admin_up()
+
+ output = [scapy.compat.chb(4)] * 256
+ os = b''.join(output)
+ rows = [{'outputs': os},
+ {'outputs': os},
+ {'outputs': os},
+ {'outputs': os}]
+
+ qem1 = VppQosEgressMap(self, 1, rows).add_vpp_config()
+ qm1 = VppQosMark(self, vlan_100, qem1,
+ vqos.QOS_API_SOURCE_VLAN).add_vpp_config()
+
+ #
+ # Configure DHCP client on PG3 and capture the discover sent
+ #
+ Client = VppDHCPClient(
+ self,
+ vlan_100.sw_if_index,
+ hostname,
+ dscp=vdscp.IP_API_DSCP_EF)
+ Client.add_vpp_config()
+
+ rx = self.pg3.get_capture(1)
+
+ self.assertEqual(rx[0][Dot1Q].vlan, 100)
+ self.assertEqual(rx[0][Dot1Q].prio, 2)
+
+ self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
+ dscp=vdscp.IP_API_DSCP_EF)
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff