--- /dev/null
+#!/usr/bin/env python
+
+import unittest
+import socket
+
+from framework import VppTestCase, VppTestRunner
+from vpp_ip_route import IpRoute, RoutePath
+from vpp_lo_interface import VppLoInterface
+
+from scapy.layers.l2 import Ether, getmacbyip
+from scapy.layers.inet import IP, UDP, ICMP
+from scapy.layers.inet6 import IPv6, in6_getnsmac, 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
+from socket import AF_INET, AF_INET6
+from scapy.utils import inet_pton, inet_ntop
+from scapy.utils6 import in6_ptop
+
+DHCP4_CLIENT_PORT = 68
+DHCP4_SERVER_PORT = 67
+DHCP6_CLIENT_PORT = 547
+DHCP6_SERVER_PORT = 546
+
+
+def mk_ll_addr(mac):
+
+ euid = in6_mactoifaceid(mac)
+ addr = "fe80::" + euid
+ return addr
+
+
+class TestDHCP(VppTestCase):
+ """ DHCP Test Case """
+
+ def setUp(self):
+ super(TestDHCP, self).setUp()
+
+ # create 3 pg interfaces
+ self.create_pg_interfaces(range(4))
+
+ # pg0 and 1 are IP configured in VRF 0 and 1.
+ # pg2 and 3 are non IP-configured in VRF 0 and 1
+ table_id = 0
+ for i in self.pg_interfaces[:2]:
+ 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[2:]:
+ i.admin_up()
+ i.set_table_ip4(table_id)
+ i.set_table_ip6(table_id)
+ table_id += 1
+
+ def send_and_assert_no_replies(self, intf, pkts, remark):
+ intf.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ for i in self.pg_interfaces:
+ i.assert_nothing_captured(remark=remark)
+
+ def validate_option_82(self, pkt, intf, ip_addr):
+ dhcp = pkt[DHCP]
+ found = 0
+ data = []
+
+ 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]
+ 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])
+
+ found = 1
+ self.assertTrue(found)
+
+ return data
+
+ def verify_dhcp_offer(self, pkt, intf, check_option_82=True):
+ 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)
+
+ dhcp = pkt[DHCP]
+ is_offer = False
+ for o in dhcp.options:
+ if type(o) is tuple:
+ if o[0] == "message-type" \
+ and DHCPTypes[o[1]] == "offer":
+ is_offer = True
+ self.assertTrue(is_offer)
+
+ if check_option_82:
+ data = self.validate_option_82(pkt, intf, intf.local_ip4)
+
+ def verify_dhcp_discover(self, pkt, intf, src_intf=None,
+ option_82_present=True):
+ ether = pkt[Ether]
+ self.assertEqual(ether.dst, intf.remote_mac)
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IP]
+ self.assertEqual(ip.dst, intf.remote_ip4)
+ 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 type(o) is tuple:
+ if o[0] == "message-type" \
+ and DHCPTypes[o[1]] == "discover":
+ is_discover = True
+ self.assertTrue(is_discover)
+
+ if option_82_present:
+ data = self.validate_option_82(pkt, src_intf, src_intf.local_ip4)
+ return data
+ else:
+ for i in dhcp.options:
+ if type(i) is tuple:
+ self.assertNotEqual(i[0], "relay_agent_Information")
+
+ def verify_dhcp6_solicit(self, pkt, intf,
+ peer_ip, peer_mac,
+ fib_id=0,
+ oui=0):
+ ether = pkt[Ether]
+ self.assertEqual(ether.dst, intf.remote_mac)
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IPv6]
+ self.assertEqual(in6_ptop(ip.dst), in6_ptop(intf.remote_ip6))
+ 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)
+
+ 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)
+
+ # 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 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.pg2.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.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_vrf1 = [p_disc_vrf0]
+
+ self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
+ "DHCP with no configuration")
+ self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
+ "DHCP with no configuration")
+
+ #
+ # Enable DHCP proxy in VRF 0
+ #
+ server_addr = self.pg0.remote_ip4n
+ src_addr = self.pg0.local_ip4n
+
+ self.vapi.dhcp_proxy_config(server_addr,
+ src_addr,
+ rx_table_id=0)
+
+ #
+ # Now a DHCP request on pg2, which is in the same VRF
+ # as the DHCP config, will result in a relayed DHCP
+ # message to the [fake] server
+ #
+ self.pg2.add_stream(pkts_disc_vrf0)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg0.get_capture(1)
+ rx = rx[0]
+
+ #
+ # 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.verify_dhcp_discover(rx, self.pg0, option_82_present=False)
+
+ #
+ # Inject a response from the server
+ # VPP will only relay the offer if option 82 is present.
+ # so this one is dropped
+ #
+ 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.pg0, pkts,
+ "DHCP offer no option 82")
+
+ #
+ # Configure sending option 82 in relayed messages
+ #
+ self.vapi.dhcp_proxy_config(server_addr,
+ src_addr,
+ rx_table_id=0,
+ insert_circuit_id=1)
+
+ #
+ # Send a request:
+ # again dropped, but ths time because there is no IP addrees on the
+ # clinet interfce to fill in the option.
+ #
+ self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
+ "DHCP no relay address")
+
+ #
+ # configure an IP address on the client facing interface
+ #
+ self.pg2.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.pg2.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_dhcp_discover(rx, self.pg0, src_intf=self.pg2)
+
+ #
+ # 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.pg2.get_capture(1)
+ rx = rx[0]
+
+ self.verify_dhcp_offer(rx, self.pg2)
+
+ #
+ # Bogus Option 82:
+ #
+ # 1. not our IP address = not checked by VPP? so offer is replayed
+ # to client
+ bad_ip = option_82[0:8] + chr(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.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ rx = self.pg2.get_capture(1)
+ rx = rx[0]
+
+ self.verify_dhcp_offer(rx, self.pg2, check_option_82=False)
+ self.pg0.assert_nothing_captured(remark="")
+
+ # 2. Not a sw_if_index VPP knows
+ bad_if_index = option_82[0:2] + chr(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.pg3, pkts_disc_vrf1,
+ "DHCP with no configuration VRF 1")
+
+ #
+ # Delete the DHCP config in VRF 0
+ # Should now drop requests.
+ #
+ self.vapi.dhcp_proxy_config(server_addr,
+ src_addr,
+ rx_table_id=0,
+ is_add=0,
+ insert_circuit_id=1)
+
+ self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
+ "DHCP config removed VRF 0")
+ self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
+ "DHCP config removed VRF 1")
+
+ #
+ # Add DHCP config for VRF 1
+ #
+ server_addr = self.pg1.remote_ip4n
+ src_addr = self.pg1.local_ip4n
+ self.vapi.dhcp_proxy_config(server_addr,
+ src_addr,
+ rx_table_id=1,
+ server_table_id=1,
+ insert_circuit_id=1)
+
+ #
+ # Confim DHCP requests ok in VRF 1.
+ # - dropped on IP config on client interface
+ #
+ self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
+ "DHCP config removed VRF 1")
+
+ #
+ # configure an IP address on the client facing interface
+ #
+ self.pg3.config_ip4()
+
+ self.pg3.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_dhcp_discover(rx, self.pg1, src_intf=self.pg3)
+
+ #
+ # remove DHCP config to cleanup
+ #
+ self.vapi.dhcp_proxy_config(server_addr,
+ src_addr,
+ rx_table_id=1,
+ server_table_id=1,
+ insert_circuit_id=1,
+ is_add=0)
+
+ self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
+ "DHCP cleanup VRF 0")
+ self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
+ "DHCP cleanup VRF 1")
+
+ 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.pg2.remote_mac)
+ dhcp_solicit_src_vrf1 = mk_ll_addr(self.pg3.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
+
+ #
+ # Add the Route to receive the DHCP packets
+ #
+ route_dhcp_vrf0 = IpRoute(self, dhcp_solicit_dst, 128,
+ [], is_local=1, is_ip6=1)
+ route_dhcp_vrf0.add_vpp_config()
+ route_dhcp_vrf1 = IpRoute(self, dhcp_solicit_dst, 128,
+ [], is_local=1, is_ip6=1,
+ table_id=1)
+ route_dhcp_vrf1.add_vpp_config()
+
+ dmac = in6_getnsmac(inet_pton(socket.AF_INET6, dhcp_solicit_dst))
+ p_solicit_vrf0 = (Ether(dst=dmac, src=self.pg2.remote_mac) /
+ IPv6(src=dhcp_solicit_src_vrf0,
+ dst=dhcp_solicit_dst) /
+ UDP(sport=DHCP6_SERVER_PORT,
+ dport=DHCP6_CLIENT_PORT) /
+ DHCP6_Solicit())
+ pkts_solicit_vrf0 = [p_solicit_vrf0]
+ p_solicit_vrf1 = (Ether(dst=dmac, src=self.pg3.remote_mac) /
+ IPv6(src=dhcp_solicit_src_vrf1,
+ dst=dhcp_solicit_dst) /
+ UDP(sport=DHCP6_SERVER_PORT,
+ dport=DHCP6_CLIENT_PORT) /
+ DHCP6_Solicit())
+ pkts_solicit_vrf1 = [p_solicit_vrf1]
+
+ self.send_and_assert_no_replies(self.pg2, pkts_solicit_vrf0,
+ "DHCP with no configuration")
+ self.send_and_assert_no_replies(self.pg3, pkts_solicit_vrf1,
+ "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,
+ insert_circuit_id=1,
+ is_ipv6=1)
+
+ self.send_and_assert_no_replies(self.pg2, pkts_solicit_vrf0,
+ "DHCP with no configuration")
+ self.send_and_assert_no_replies(self.pg3, pkts_solicit_vrf1,
+ "DHCP with no configuration")
+
+ #
+ # configure an IP address on the client facing interface
+ #
+ self.pg2.config_ip6()
+
+ #
+ # Now the DHCP requests are relayed to the server
+ #
+ self.pg2.add_stream(pkts_solicit_vrf0)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg0.get_capture(1)
+ rx = rx[0]
+ self.verify_dhcp6_solicit(rx, self.pg0,
+ dhcp_solicit_src_vrf0,
+ self.pg2.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())
+ pkts_adv_vrf0 = [p_adv_vrf0]
+ self.send_and_assert_no_replies(self.pg2, pkts_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())
+ pkts_adv_vrf0 = [p_adv_vrf0]
+ self.send_and_assert_no_replies(self.pg2, pkts_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())
+ pkts_adv_vrf0 = [p_adv_vrf0]
+ self.send_and_assert_no_replies(self.pg2, pkts_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())
+ pkts_adv_vrf0 = [p_adv_vrf0]
+ self.send_and_assert_no_replies(self.pg2, pkts_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\x03') /
+ 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.pg2.get_capture(1)
+ rx = rx[0]
+ self.verify_dhcp6_advert(rx, self.pg2, "::")
+
+ #
+ # 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\x03') /
+ 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.pg2.get_capture(1)
+ rx = rx[0]
+ self.verify_dhcp6_advert(rx, self.pg2, dhcp_solicit_src_vrf0)
+
+ #
+ # Add all the config for VRF 1
+ #
+ self.vapi.dhcp_proxy_config(server_addr_vrf1,
+ src_addr_vrf1,
+ rx_table_id=1,
+ server_table_id=1,
+ insert_circuit_id=1,
+ is_ipv6=1)
+ self.pg3.config_ip6()
+
+ #
+ # VRF 1 solicit
+ #
+ self.pg3.add_stream(pkts_solicit_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(1)
+ rx = rx[0]
+ self.verify_dhcp6_solicit(rx, self.pg1,
+ dhcp_solicit_src_vrf1,
+ self.pg3.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\x04') /
+ 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.pg3.get_capture(1)
+ rx = rx[0]
+ self.verify_dhcp6_advert(rx, self.pg3, dhcp_solicit_src_vrf1)
+
+ #
+ # Add VSS config
+ # table=1, fib=id=1, oui=4
+ self.vapi.dhcp_proxy_set_vss(1, 1, 4, is_ip6=1)
+
+ self.pg3.add_stream(pkts_solicit_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(1)
+ rx = rx[0]
+ self.verify_dhcp6_solicit(rx, self.pg1,
+ dhcp_solicit_src_vrf1,
+ self.pg3.remote_mac,
+ fib_id=1,
+ oui=4)
+
+ #
+ # Remove the VSS config
+ # relayed DHCP has default vlaues in the option.
+ #
+ self.vapi.dhcp_proxy_set_vss(1, 1, 4, is_ip6=1, is_add=0)
+
+ self.pg3.add_stream(pkts_solicit_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(1)
+ rx = rx[0]
+ self.verify_dhcp6_solicit(rx, self.pg1,
+ dhcp_solicit_src_vrf1,
+ self.pg3.remote_mac)
+
+ #
+ # Cleanup
+ #
+ self.vapi.dhcp_proxy_config(server_addr_vrf1,
+ src_addr_vrf1,
+ rx_table_id=1,
+ server_table_id=1,
+ insert_circuit_id=1,
+ is_ipv6=1,
+ is_add=0)
+ self.vapi.dhcp_proxy_config(server_addr_vrf1,
+ src_addr_vrf1,
+ rx_table_id=0,
+ server_table_id=0,
+ insert_circuit_id=1,
+ is_ipv6=1,
+ is_add=0)
+
+ route_dhcp_vrf0.remove_vpp_config()
+ route_dhcp_vrf1.remove_vpp_config()
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / commitdiff