7 from framework import VppTestCase, VppTestRunner, running_extended_tests
8 from vpp_neighbor import VppNeighbor
9 from vpp_ip_route import find_route, VppIpTable
10 from util import mk_ll_addr
12 from scapy.layers.l2 import Ether, getmacbyip, ARP, Dot1Q
13 from scapy.layers.inet import IP, UDP, ICMP
14 from scapy.layers.inet6 import IPv6, in6_getnsmac
15 from scapy.utils6 import in6_mactoifaceid
16 from scapy.layers.dhcp import DHCP, BOOTP, DHCPTypes
17 from scapy.layers.dhcp6 import DHCP6, DHCP6_Solicit, DHCP6_RelayForward, \
18 DHCP6_RelayReply, DHCP6_Advertise, DHCP6OptRelayMsg, DHCP6OptIfaceId, \
19 DHCP6OptStatusCode, DHCP6OptVSS, DHCP6OptClientLinkLayerAddr, DHCP6_Request
20 from socket import AF_INET, AF_INET6
21 from scapy.utils import inet_pton, inet_ntop
22 from scapy.utils6 import in6_ptop
23 from vpp_papi import mac_pton, VppEnum
24 from vpp_sub_interface import VppDot1QSubint
25 from vpp_qos import VppQosEgressMap, VppQosMark
26 from vpp_dhcp import VppDHCPClient, VppDHCPProxy
29 DHCP4_CLIENT_PORT = 68
30 DHCP4_SERVER_PORT = 67
31 DHCP6_CLIENT_PORT = 547
32 DHCP6_SERVER_PORT = 546
35 class TestDHCP(VppTestCase):
36 """ DHCP Test Case """
40 super(TestDHCP, cls).setUpClass()
43 def tearDownClass(cls):
44 super(TestDHCP, cls).tearDownClass()
47 super(TestDHCP, self).setUp()
49 # create 6 pg interfaces for pg0 to pg5
50 self.create_pg_interfaces(range(6))
53 # pg0 to 2 are IP configured in VRF 0, 1 and 2.
54 # pg3 to 5 are non IP-configured in VRF 0, 1 and 2.
56 for table_id in range(1, 4):
57 tbl4 = VppIpTable(self, table_id)
59 self.tables.append(tbl4)
60 tbl6 = VppIpTable(self, table_id, is_ip6=1)
62 self.tables.append(tbl6)
65 for i in self.pg_interfaces[:3]:
67 i.set_table_ip4(table_id)
68 i.set_table_ip6(table_id)
76 for i in self.pg_interfaces[3:]:
78 i.set_table_ip4(table_id)
79 i.set_table_ip6(table_id)
83 for i in self.pg_interfaces[:3]:
87 for i in self.pg_interfaces:
91 super(TestDHCP, self).tearDown()
93 def verify_dhcp_has_option(self, pkt, option, value):
97 for i in dhcp.options:
98 if isinstance(i, tuple):
100 self.assertEqual(i[1], value)
103 self.assertTrue(found)
105 def validate_relay_options(self, pkt, intf, ip_addr, vpn_id, fib_id, oui):
111 for i in dhcp.options:
112 if isinstance(i, tuple):
113 if i[0] == "relay_agent_Information":
115 # There are two sb-options present - each of length 6.
119 self.assertEqual(len(data), 24)
120 elif len(vpn_id) > 0:
121 self.assertEqual(len(data), len(vpn_id) + 17)
123 self.assertEqual(len(data), 12)
126 # First sub-option is ID 1, len 4, then encoded
127 # sw_if_index. This test uses low valued indicies
129 # The ID space is VPP internal - so no matching value
132 self.assertEqual(ord(data[0]), 1)
133 self.assertEqual(ord(data[1]), 4)
134 self.assertEqual(ord(data[2]), 0)
135 self.assertEqual(ord(data[3]), 0)
136 self.assertEqual(ord(data[4]), 0)
137 self.assertEqual(ord(data[5]), intf._sw_if_index)
140 # next sub-option is the IP address of the client side
142 # sub-option ID=5, length (of a v4 address)=4
144 claddr = socket.inet_pton(AF_INET, ip_addr)
146 self.assertEqual(ord(data[6]), 5)
147 self.assertEqual(ord(data[7]), 4)
148 self.assertEqual(data[8], claddr[0])
149 self.assertEqual(data[9], claddr[1])
150 self.assertEqual(data[10], claddr[2])
151 self.assertEqual(data[11], claddr[3])
154 # sub-option 151 encodes vss_type 1,
155 # the 3 byte oui and the 4 byte fib_id
156 self.assertEqual(id_len, 0)
157 self.assertEqual(ord(data[12]), 151)
158 self.assertEqual(ord(data[13]), 8)
159 self.assertEqual(ord(data[14]), 1)
160 self.assertEqual(ord(data[15]), 0)
161 self.assertEqual(ord(data[16]), 0)
162 self.assertEqual(ord(data[17]), oui)
163 self.assertEqual(ord(data[18]), 0)
164 self.assertEqual(ord(data[19]), 0)
165 self.assertEqual(ord(data[20]), 0)
166 self.assertEqual(ord(data[21]), fib_id)
168 # VSS control sub-option
169 self.assertEqual(ord(data[22]), 152)
170 self.assertEqual(ord(data[23]), 0)
173 # sub-option 151 encode vss_type of 0
174 # followerd by vpn_id in ascii
175 self.assertEqual(oui, 0)
176 self.assertEqual(ord(data[12]), 151)
177 self.assertEqual(ord(data[13]), id_len + 1)
178 self.assertEqual(ord(data[14]), 0)
179 self.assertEqual(data[15:15 + id_len], vpn_id)
181 # VSS control sub-option
182 self.assertEqual(ord(data[15 + len(vpn_id)]), 152)
183 self.assertEqual(ord(data[16 + len(vpn_id)]), 0)
186 self.assertTrue(found)
190 def verify_dhcp_msg_type(self, pkt, name):
193 for o in dhcp.options:
194 if isinstance(o, tuple):
195 if o[0] == "message-type" \
196 and DHCPTypes[o[1]] == name:
198 self.assertTrue(found)
200 def verify_dhcp_offer(self, pkt, intf, vpn_id="", fib_id=0, oui=0):
202 self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
203 self.assertEqual(ether.src, intf.local_mac)
206 self.assertEqual(ip.dst, "255.255.255.255")
207 self.assertEqual(ip.src, intf.local_ip4)
210 self.assertEqual(udp.dport, DHCP4_CLIENT_PORT)
211 self.assertEqual(udp.sport, DHCP4_SERVER_PORT)
213 self.verify_dhcp_msg_type(pkt, "offer")
214 data = self.validate_relay_options(pkt, intf, intf.local_ip4,
217 def verify_orig_dhcp_pkt(self, pkt, intf, dscp, l2_bc=True):
220 self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
222 self.assertEqual(ether.dst, intf.remote_mac)
223 self.assertEqual(ether.src, intf.local_mac)
228 self.assertEqual(ip.dst, "255.255.255.255")
229 self.assertEqual(ip.src, "0.0.0.0")
231 self.assertEqual(ip.dst, intf.remote_ip4)
232 self.assertEqual(ip.src, intf.local_ip4)
233 self.assertEqual(ip.tos, dscp)
236 self.assertEqual(udp.dport, DHCP4_SERVER_PORT)
237 self.assertEqual(udp.sport, DHCP4_CLIENT_PORT)
239 def verify_orig_dhcp_discover(self, pkt, intf, hostname, client_id=None,
240 broadcast=True, dscp=0):
241 self.verify_orig_dhcp_pkt(pkt, intf, dscp)
243 self.verify_dhcp_msg_type(pkt, "discover")
244 self.verify_dhcp_has_option(pkt, "hostname", hostname)
246 self.verify_dhcp_has_option(pkt, "client_id", client_id)
248 self.assertEqual(bootp.ciaddr, "0.0.0.0")
249 self.assertEqual(bootp.giaddr, "0.0.0.0")
251 self.assertEqual(bootp.flags, 0x8000)
253 self.assertEqual(bootp.flags, 0x0000)
255 def verify_orig_dhcp_request(self, pkt, intf, hostname, ip,
259 self.verify_orig_dhcp_pkt(pkt, intf, dscp, l2_bc=l2_bc)
261 self.verify_dhcp_msg_type(pkt, "request")
262 self.verify_dhcp_has_option(pkt, "hostname", hostname)
263 self.verify_dhcp_has_option(pkt, "requested_addr", ip)
267 self.assertEqual(bootp.ciaddr, "0.0.0.0")
269 self.assertEqual(bootp.ciaddr, intf.local_ip4)
270 self.assertEqual(bootp.giaddr, "0.0.0.0")
273 self.assertEqual(bootp.flags, 0x8000)
275 self.assertEqual(bootp.flags, 0x0000)
277 def verify_relayed_dhcp_discover(self, pkt, intf, src_intf=None,
280 dst_mac=None, dst_ip=None):
282 dst_mac = intf.remote_mac
284 dst_ip = intf.remote_ip4
287 self.assertEqual(ether.dst, dst_mac)
288 self.assertEqual(ether.src, intf.local_mac)
291 self.assertEqual(ip.dst, dst_ip)
292 self.assertEqual(ip.src, intf.local_ip4)
295 self.assertEqual(udp.dport, DHCP4_SERVER_PORT)
296 self.assertEqual(udp.sport, DHCP4_CLIENT_PORT)
301 for o in dhcp.options:
302 if isinstance(o, tuple):
303 if o[0] == "message-type" \
304 and DHCPTypes[o[1]] == "discover":
306 self.assertTrue(is_discover)
308 data = self.validate_relay_options(pkt, src_intf,
314 def verify_dhcp6_solicit(self, pkt, intf,
322 dst_mac = intf.remote_mac
324 dst_ip = in6_ptop(intf.remote_ip6)
327 self.assertEqual(ether.dst, dst_mac)
328 self.assertEqual(ether.src, intf.local_mac)
331 self.assertEqual(in6_ptop(ip.dst), dst_ip)
332 self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6))
335 self.assertEqual(udp.dport, DHCP6_CLIENT_PORT)
336 self.assertEqual(udp.sport, DHCP6_SERVER_PORT)
338 relay = pkt[DHCP6_RelayForward]
339 self.assertEqual(in6_ptop(relay.peeraddr), in6_ptop(peer_ip))
340 oid = pkt[DHCP6OptIfaceId]
341 cll = pkt[DHCP6OptClientLinkLayerAddr]
342 self.assertEqual(cll.optlen, 8)
343 self.assertEqual(cll.lltype, 1)
344 self.assertEqual(cll.clladdr, peer_mac)
349 self.assertEqual(id_len, 0)
350 vss = pkt[DHCP6OptVSS]
351 self.assertEqual(vss.optlen, 8)
352 self.assertEqual(vss.type, 1)
353 # the OUI and FIB-id are really 3 and 4 bytes resp.
354 # but the tested range is small
355 self.assertEqual(ord(vss.data[0]), 0)
356 self.assertEqual(ord(vss.data[1]), 0)
357 self.assertEqual(ord(vss.data[2]), oui)
358 self.assertEqual(ord(vss.data[3]), 0)
359 self.assertEqual(ord(vss.data[4]), 0)
360 self.assertEqual(ord(vss.data[5]), 0)
361 self.assertEqual(ord(vss.data[6]), fib_id)
364 self.assertEqual(oui, 0)
365 vss = pkt[DHCP6OptVSS]
366 self.assertEqual(vss.optlen, id_len + 1)
367 self.assertEqual(vss.type, 0)
368 self.assertEqual(vss.data[0:id_len], vpn_id)
370 # the relay message should be an encoded Solicit
371 msg = pkt[DHCP6OptRelayMsg]
372 sol = DHCP6_Solicit()
373 self.assertEqual(msg.optlen, len(str(sol)))
374 self.assertEqual(str(sol), (str(msg[1]))[:msg.optlen])
376 def verify_dhcp6_advert(self, pkt, intf, peer):
378 self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
379 self.assertEqual(ether.src, intf.local_mac)
382 self.assertEqual(in6_ptop(ip.dst), in6_ptop(peer))
383 self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6))
386 self.assertEqual(udp.dport, DHCP6_SERVER_PORT)
387 self.assertEqual(udp.sport, DHCP6_CLIENT_PORT)
389 # not sure why this is not decoding
390 # adv = pkt[DHCP6_Advertise]
392 def wait_for_no_route(self, address, length,
393 n_tries=50, s_time=1):
395 if not find_route(self, address, length):
397 n_tries = n_tries - 1
402 def test_dhcp_proxy(self):
406 # Verify no response to DHCP request without DHCP config
408 p_disc_vrf0 = (Ether(dst="ff:ff:ff:ff:ff:ff",
409 src=self.pg3.remote_mac) /
410 IP(src="0.0.0.0", dst="255.255.255.255") /
411 UDP(sport=DHCP4_CLIENT_PORT,
412 dport=DHCP4_SERVER_PORT) /
414 DHCP(options=[('message-type', 'discover'), ('end')]))
415 pkts_disc_vrf0 = [p_disc_vrf0]
416 p_disc_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff",
417 src=self.pg4.remote_mac) /
418 IP(src="0.0.0.0", dst="255.255.255.255") /
419 UDP(sport=DHCP4_CLIENT_PORT,
420 dport=DHCP4_SERVER_PORT) /
422 DHCP(options=[('message-type', 'discover'), ('end')]))
423 pkts_disc_vrf1 = [p_disc_vrf1]
424 p_disc_vrf2 = (Ether(dst="ff:ff:ff:ff:ff:ff",
425 src=self.pg5.remote_mac) /
426 IP(src="0.0.0.0", dst="255.255.255.255") /
427 UDP(sport=DHCP4_CLIENT_PORT,
428 dport=DHCP4_SERVER_PORT) /
430 DHCP(options=[('message-type', 'discover'), ('end')]))
431 pkts_disc_vrf2 = [p_disc_vrf2]
433 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
434 "DHCP with no configuration")
435 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
436 "DHCP with no configuration")
437 self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
438 "DHCP with no configuration")
441 # Enable DHCP proxy in VRF 0
443 server_addr = self.pg0.remote_ip4
444 src_addr = self.pg0.local_ip4
446 Proxy = VppDHCPProxy(self, server_addr, src_addr, rx_vrf_id=0)
447 Proxy.add_vpp_config()
450 # Discover packets from the client are dropped because there is no
451 # IP address configured on the client facing interface
453 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
454 "Discover DHCP no relay address")
457 # Inject a response from the server
458 # dropped, because there is no IP addrees on the
459 # client interfce to fill in the option.
461 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
462 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
463 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
465 DHCP(options=[('message-type', 'offer'), ('end')]))
468 self.send_and_assert_no_replies(self.pg3, pkts,
469 "Offer DHCP no relay address")
472 # configure an IP address on the client facing interface
474 self.pg3.config_ip4()
477 # Try again with a discover packet
478 # Rx'd packet should be to the server address and from the configured
480 # UDP source ports are unchanged
481 # we've no option 82 config so that should be absent
483 self.pg3.add_stream(pkts_disc_vrf0)
484 self.pg_enable_capture(self.pg_interfaces)
487 rx = self.pg0.get_capture(1)
490 option_82 = self.verify_relayed_dhcp_discover(rx, self.pg0,
494 # Create an DHCP offer reply from the server with a correctly formatted
495 # option 82. i.e. send back what we just captured
496 # The offer, sent mcast to the client, still has option 82.
498 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
499 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
500 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
502 DHCP(options=[('message-type', 'offer'),
503 ('relay_agent_Information', option_82),
507 self.pg0.add_stream(pkts)
508 self.pg_enable_capture(self.pg_interfaces)
511 rx = self.pg3.get_capture(1)
514 self.verify_dhcp_offer(rx, self.pg3)
519 # 1. not our IP address = not checked by VPP? so offer is replayed
521 bad_ip = option_82[0:8] + scapy.compat.chb(33) + option_82[9:]
523 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
524 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
525 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
527 DHCP(options=[('message-type', 'offer'),
528 ('relay_agent_Information', bad_ip),
531 self.send_and_assert_no_replies(self.pg0, pkts,
532 "DHCP offer option 82 bad address")
534 # 2. Not a sw_if_index VPP knows
535 bad_if_index = option_82[0:2] + scapy.compat.chb(33) + option_82[3:]
537 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
538 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
539 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
541 DHCP(options=[('message-type', 'offer'),
542 ('relay_agent_Information', bad_if_index),
545 self.send_and_assert_no_replies(self.pg0, pkts,
546 "DHCP offer option 82 bad if index")
549 # Send a DHCP request in VRF 1. should be dropped.
551 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
552 "DHCP with no configuration VRF 1")
555 # Delete the DHCP config in VRF 0
556 # Should now drop requests.
558 Proxy.remove_vpp_config()
560 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
561 "DHCP config removed VRF 0")
562 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
563 "DHCP config removed VRF 1")
566 # Add DHCP config for VRF 1 & 2
568 server_addr1 = self.pg1.remote_ip4
569 src_addr1 = self.pg1.local_ip4
570 Proxy1 = VppDHCPProxy(
576 Proxy1.add_vpp_config()
578 server_addr2 = self.pg2.remote_ip4
579 src_addr2 = self.pg2.local_ip4
580 Proxy2 = VppDHCPProxy(
586 Proxy2.add_vpp_config()
589 # Confim DHCP requests ok in VRF 1 & 2.
590 # - dropped on IP config on client interface
592 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
593 "DHCP config removed VRF 1")
594 self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
595 "DHCP config removed VRF 2")
598 # configure an IP address on the client facing interface
600 self.pg4.config_ip4()
601 self.pg4.add_stream(pkts_disc_vrf1)
602 self.pg_enable_capture(self.pg_interfaces)
604 rx = self.pg1.get_capture(1)
606 self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4)
608 self.pg5.config_ip4()
609 self.pg5.add_stream(pkts_disc_vrf2)
610 self.pg_enable_capture(self.pg_interfaces)
612 rx = self.pg2.get_capture(1)
614 self.verify_relayed_dhcp_discover(rx, self.pg2, src_intf=self.pg5)
618 # table=1, vss_type=1, vpn_index=1, oui=4
619 # table=2, vss_type=0, vpn_id = "ip4-table-2"
620 self.vapi.dhcp_proxy_set_vss(1, 1, vpn_index=1, oui=4, is_add=1)
621 self.vapi.dhcp_proxy_set_vss(2, 0, "ip4-table-2", is_add=1)
623 self.pg4.add_stream(pkts_disc_vrf1)
624 self.pg_enable_capture(self.pg_interfaces)
627 rx = self.pg1.get_capture(1)
629 self.verify_relayed_dhcp_discover(rx, self.pg1,
633 self.pg5.add_stream(pkts_disc_vrf2)
634 self.pg_enable_capture(self.pg_interfaces)
637 rx = self.pg2.get_capture(1)
639 self.verify_relayed_dhcp_discover(rx, self.pg2,
641 vpn_id="ip4-table-2")
644 # Add a second DHCP server in VRF 1
645 # expect clients messages to be relay to both configured servers
647 self.pg1.generate_remote_hosts(2)
648 server_addr12 = self.pg1.remote_hosts[1].ip4
650 Proxy12 = VppDHCPProxy(
656 Proxy12.add_vpp_config()
659 # We'll need an ARP entry for the server to send it packets
661 arp_entry = VppNeighbor(self,
662 self.pg1.sw_if_index,
663 self.pg1.remote_hosts[1].mac,
664 self.pg1.remote_hosts[1].ip4)
665 arp_entry.add_vpp_config()
668 # Send a discover from the client. expect two relayed messages
669 # The frist packet is sent to the second server
670 # We're not enforcing that here, it's just the way it is.
672 self.pg4.add_stream(pkts_disc_vrf1)
673 self.pg_enable_capture(self.pg_interfaces)
676 rx = self.pg1.get_capture(2)
678 option_82 = self.verify_relayed_dhcp_discover(
681 dst_mac=self.pg1.remote_hosts[1].mac,
682 dst_ip=self.pg1.remote_hosts[1].ip4,
684 self.verify_relayed_dhcp_discover(rx[1], self.pg1,
689 # Send both packets back. Client gets both.
691 p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
692 IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) /
693 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
695 DHCP(options=[('message-type', 'offer'),
696 ('relay_agent_Information', option_82),
698 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
699 IP(src=self.pg1.remote_hosts[1].ip4, dst=self.pg1.local_ip4) /
700 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
702 DHCP(options=[('message-type', 'offer'),
703 ('relay_agent_Information', option_82),
707 self.pg1.add_stream(pkts)
708 self.pg_enable_capture(self.pg_interfaces)
711 rx = self.pg4.get_capture(2)
713 self.verify_dhcp_offer(rx[0], self.pg4, fib_id=1, oui=4)
714 self.verify_dhcp_offer(rx[1], self.pg4, fib_id=1, oui=4)
717 # Ensure offers from non-servers are dropeed
719 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
720 IP(src="8.8.8.8", dst=self.pg1.local_ip4) /
721 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
723 DHCP(options=[('message-type', 'offer'),
724 ('relay_agent_Information', option_82),
726 self.send_and_assert_no_replies(self.pg1, p2,
727 "DHCP offer from non-server")
730 # Ensure only the discover is sent to multiple servers
732 p_req_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff",
733 src=self.pg4.remote_mac) /
734 IP(src="0.0.0.0", dst="255.255.255.255") /
735 UDP(sport=DHCP4_CLIENT_PORT,
736 dport=DHCP4_SERVER_PORT) /
738 DHCP(options=[('message-type', 'request'),
741 self.pg4.add_stream(p_req_vrf1)
742 self.pg_enable_capture(self.pg_interfaces)
745 rx = self.pg1.get_capture(1)
748 # Remove the second DHCP server
750 Proxy12.remove_vpp_config()
753 # Test we can still relay with the first
755 self.pg4.add_stream(pkts_disc_vrf1)
756 self.pg_enable_capture(self.pg_interfaces)
759 rx = self.pg1.get_capture(1)
761 self.verify_relayed_dhcp_discover(rx, self.pg1,
766 # Remove the VSS config
767 # relayed DHCP has default vlaues in the option.
769 self.vapi.dhcp_proxy_set_vss(1, is_add=0)
770 self.vapi.dhcp_proxy_set_vss(2, is_add=0)
772 self.pg4.add_stream(pkts_disc_vrf1)
773 self.pg_enable_capture(self.pg_interfaces)
776 rx = self.pg1.get_capture(1)
778 self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4)
781 # remove DHCP config to cleanup
783 Proxy1.remove_vpp_config()
784 Proxy2.remove_vpp_config()
786 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
787 "DHCP cleanup VRF 0")
788 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
789 "DHCP cleanup VRF 1")
790 self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
791 "DHCP cleanup VRF 2")
793 self.pg3.unconfig_ip4()
794 self.pg4.unconfig_ip4()
795 self.pg5.unconfig_ip4()
797 def test_dhcp6_proxy(self):
800 # Verify no response to DHCP request without DHCP config
802 dhcp_solicit_dst = "ff02::1:2"
803 dhcp_solicit_src_vrf0 = mk_ll_addr(self.pg3.remote_mac)
804 dhcp_solicit_src_vrf1 = mk_ll_addr(self.pg4.remote_mac)
805 dhcp_solicit_src_vrf2 = mk_ll_addr(self.pg5.remote_mac)
806 server_addr_vrf0 = self.pg0.remote_ip6
807 src_addr_vrf0 = self.pg0.local_ip6
808 server_addr_vrf1 = self.pg1.remote_ip6
809 src_addr_vrf1 = self.pg1.local_ip6
810 server_addr_vrf2 = self.pg2.remote_ip6
811 src_addr_vrf2 = self.pg2.local_ip6
813 dmac = in6_getnsmac(inet_pton(socket.AF_INET6, dhcp_solicit_dst))
814 p_solicit_vrf0 = (Ether(dst=dmac, src=self.pg3.remote_mac) /
815 IPv6(src=dhcp_solicit_src_vrf0,
816 dst=dhcp_solicit_dst) /
817 UDP(sport=DHCP6_SERVER_PORT,
818 dport=DHCP6_CLIENT_PORT) /
820 p_solicit_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) /
821 IPv6(src=dhcp_solicit_src_vrf1,
822 dst=dhcp_solicit_dst) /
823 UDP(sport=DHCP6_SERVER_PORT,
824 dport=DHCP6_CLIENT_PORT) /
826 p_solicit_vrf2 = (Ether(dst=dmac, src=self.pg5.remote_mac) /
827 IPv6(src=dhcp_solicit_src_vrf2,
828 dst=dhcp_solicit_dst) /
829 UDP(sport=DHCP6_SERVER_PORT,
830 dport=DHCP6_CLIENT_PORT) /
833 self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0,
834 "DHCP with no configuration")
835 self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1,
836 "DHCP with no configuration")
837 self.send_and_assert_no_replies(self.pg5, p_solicit_vrf2,
838 "DHCP with no configuration")
841 # DHCPv6 config in VRF 0.
842 # Packets still dropped because the client facing interface has no
845 Proxy = VppDHCPProxy(
851 Proxy.add_vpp_config()
853 self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0,
854 "DHCP with no configuration")
855 self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1,
856 "DHCP with no configuration")
859 # configure an IP address on the client facing interface
861 self.pg3.config_ip6()
864 # Now the DHCP requests are relayed to the server
866 self.pg3.add_stream(p_solicit_vrf0)
867 self.pg_enable_capture(self.pg_interfaces)
870 rx = self.pg0.get_capture(1)
872 self.verify_dhcp6_solicit(rx[0], self.pg0,
873 dhcp_solicit_src_vrf0,
877 # Exception cases for rejected relay responses
880 # 1 - not a relay reply
881 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
882 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
883 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
885 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
886 "DHCP6 not a relay reply")
888 # 2 - no relay message option
889 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
890 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
891 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
894 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
895 "DHCP not a relay message")
898 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
899 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
900 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
902 DHCP6OptRelayMsg(optlen=0) /
904 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
905 "DHCP6 no circuit ID")
906 # 4 - wrong circuit ID
907 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
908 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
909 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
911 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
912 DHCP6OptRelayMsg(optlen=0) /
914 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
915 "DHCP6 wrong circuit ID")
918 # Send the relay response (the advertisement)
920 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
921 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
922 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
924 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
925 DHCP6OptRelayMsg(optlen=0) /
926 DHCP6_Advertise(trid=1) /
927 DHCP6OptStatusCode(statuscode=0))
928 pkts_adv_vrf0 = [p_adv_vrf0]
930 self.pg0.add_stream(pkts_adv_vrf0)
931 self.pg_enable_capture(self.pg_interfaces)
934 rx = self.pg3.get_capture(1)
936 self.verify_dhcp6_advert(rx[0], self.pg3, "::")
939 # Send the relay response (the advertisement)
940 # - with peer address
941 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
942 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
943 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
944 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf0) /
945 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
946 DHCP6OptRelayMsg(optlen=0) /
947 DHCP6_Advertise(trid=1) /
948 DHCP6OptStatusCode(statuscode=0))
949 pkts_adv_vrf0 = [p_adv_vrf0]
951 self.pg0.add_stream(pkts_adv_vrf0)
952 self.pg_enable_capture(self.pg_interfaces)
955 rx = self.pg3.get_capture(1)
957 self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf0)
960 # Add all the config for VRF 1 & 2
962 Proxy1 = VppDHCPProxy(
968 Proxy1.add_vpp_config()
969 self.pg4.config_ip6()
971 Proxy2 = VppDHCPProxy(
977 Proxy2.add_vpp_config()
978 self.pg5.config_ip6()
983 self.pg4.add_stream(p_solicit_vrf1)
984 self.pg_enable_capture(self.pg_interfaces)
987 rx = self.pg1.get_capture(1)
989 self.verify_dhcp6_solicit(rx[0], self.pg1,
990 dhcp_solicit_src_vrf1,
996 self.pg5.add_stream(p_solicit_vrf2)
997 self.pg_enable_capture(self.pg_interfaces)
1000 rx = self.pg2.get_capture(1)
1002 self.verify_dhcp6_solicit(rx[0], self.pg2,
1003 dhcp_solicit_src_vrf2,
1004 self.pg5.remote_mac)
1009 p_adv_vrf1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1010 IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) /
1011 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
1012 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
1013 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
1014 DHCP6OptRelayMsg(optlen=0) /
1015 DHCP6_Advertise(trid=1) /
1016 DHCP6OptStatusCode(statuscode=0))
1017 pkts_adv_vrf1 = [p_adv_vrf1]
1019 self.pg1.add_stream(pkts_adv_vrf1)
1020 self.pg_enable_capture(self.pg_interfaces)
1023 rx = self.pg4.get_capture(1)
1025 self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1)
1030 self.vapi.dhcp_proxy_set_vss(
1031 tbl_id=1, vss_type=1, oui=4, vpn_index=1, is_ipv6=1)
1032 self.vapi.dhcp_proxy_set_vss(
1035 vpn_ascii_id="IPv6-table-2",
1038 self.pg4.add_stream(p_solicit_vrf1)
1039 self.pg_enable_capture(self.pg_interfaces)
1042 rx = self.pg1.get_capture(1)
1044 self.verify_dhcp6_solicit(rx[0], self.pg1,
1045 dhcp_solicit_src_vrf1,
1046 self.pg4.remote_mac,
1050 self.pg5.add_stream(p_solicit_vrf2)
1051 self.pg_enable_capture(self.pg_interfaces)
1054 rx = self.pg2.get_capture(1)
1056 self.verify_dhcp6_solicit(rx[0], self.pg2,
1057 dhcp_solicit_src_vrf2,
1058 self.pg5.remote_mac,
1059 vpn_id="IPv6-table-2")
1062 # Remove the VSS config
1063 # relayed DHCP has default vlaues in the option.
1065 self.vapi.dhcp_proxy_set_vss(1, is_ipv6=1, is_add=0)
1067 self.pg4.add_stream(p_solicit_vrf1)
1068 self.pg_enable_capture(self.pg_interfaces)
1071 rx = self.pg1.get_capture(1)
1073 self.verify_dhcp6_solicit(rx[0], self.pg1,
1074 dhcp_solicit_src_vrf1,
1075 self.pg4.remote_mac)
1078 # Add a second DHCP server in VRF 1
1079 # expect clients messages to be relay to both configured servers
1081 self.pg1.generate_remote_hosts(2)
1082 server_addr12 = self.pg1.remote_hosts[1].ip6
1084 Proxy12 = VppDHCPProxy(
1090 Proxy12.add_vpp_config()
1093 # We'll need an ND entry for the server to send it packets
1095 nd_entry = VppNeighbor(self,
1096 self.pg1.sw_if_index,
1097 self.pg1.remote_hosts[1].mac,
1098 self.pg1.remote_hosts[1].ip6)
1099 nd_entry.add_vpp_config()
1102 # Send a discover from the client. expect two relayed messages
1103 # The frist packet is sent to the second server
1104 # We're not enforcing that here, it's just the way it is.
1106 self.pg4.add_stream(p_solicit_vrf1)
1107 self.pg_enable_capture(self.pg_interfaces)
1110 rx = self.pg1.get_capture(2)
1112 self.verify_dhcp6_solicit(rx[0], self.pg1,
1113 dhcp_solicit_src_vrf1,
1114 self.pg4.remote_mac)
1115 self.verify_dhcp6_solicit(rx[1], self.pg1,
1116 dhcp_solicit_src_vrf1,
1117 self.pg4.remote_mac,
1118 dst_mac=self.pg1.remote_hosts[1].mac,
1119 dst_ip=self.pg1.remote_hosts[1].ip6)
1122 # Send both packets back. Client gets both.
1124 p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1125 IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) /
1126 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
1127 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
1128 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
1129 DHCP6OptRelayMsg(optlen=0) /
1130 DHCP6_Advertise(trid=1) /
1131 DHCP6OptStatusCode(statuscode=0))
1132 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
1133 IPv6(dst=self.pg1.local_ip6, src=self.pg1._remote_hosts[1].ip6) /
1134 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
1135 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
1136 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
1137 DHCP6OptRelayMsg(optlen=0) /
1138 DHCP6_Advertise(trid=1) /
1139 DHCP6OptStatusCode(statuscode=0))
1143 self.pg1.add_stream(pkts)
1144 self.pg_enable_capture(self.pg_interfaces)
1147 rx = self.pg4.get_capture(2)
1149 self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1)
1150 self.verify_dhcp6_advert(rx[1], self.pg4, dhcp_solicit_src_vrf1)
1153 # Ensure only solicit messages are duplicated
1155 p_request_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) /
1156 IPv6(src=dhcp_solicit_src_vrf1,
1157 dst=dhcp_solicit_dst) /
1158 UDP(sport=DHCP6_SERVER_PORT,
1159 dport=DHCP6_CLIENT_PORT) /
1162 self.pg4.add_stream(p_request_vrf1)
1163 self.pg_enable_capture(self.pg_interfaces)
1166 rx = self.pg1.get_capture(1)
1169 # Test we drop DHCP packets from addresses that are not configured as
1172 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
1173 IPv6(dst=self.pg1.local_ip6, src="3001::1") /
1174 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
1175 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
1176 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
1177 DHCP6OptRelayMsg(optlen=0) /
1178 DHCP6_Advertise(trid=1) /
1179 DHCP6OptStatusCode(statuscode=0))
1180 self.send_and_assert_no_replies(self.pg1, p2,
1181 "DHCP6 not from server")
1184 # Remove the second DHCP server
1186 Proxy12.remove_vpp_config()
1189 # Test we can still relay with the first
1191 self.pg4.add_stream(p_solicit_vrf1)
1192 self.pg_enable_capture(self.pg_interfaces)
1195 rx = self.pg1.get_capture(1)
1197 self.verify_dhcp6_solicit(rx[0], self.pg1,
1198 dhcp_solicit_src_vrf1,
1199 self.pg4.remote_mac)
1204 Proxy.remove_vpp_config()
1205 Proxy1.remove_vpp_config()
1206 Proxy2.remove_vpp_config()
1208 self.pg3.unconfig_ip6()
1209 self.pg4.unconfig_ip6()
1210 self.pg5.unconfig_ip6()
1212 def test_dhcp_client(self):
1215 vdscp = VppEnum.vl_api_ip_dscp_t
1216 hostname = 'universal-dp'
1218 self.pg_enable_capture(self.pg_interfaces)
1221 # Configure DHCP client on PG3 and capture the discover sent
1223 Client = VppDHCPClient(self, self.pg3.sw_if_index, hostname)
1224 Client.add_vpp_config()
1225 self.assertTrue(Client.query_vpp_config())
1227 rx = self.pg3.get_capture(1)
1229 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname)
1232 # Send back on offer, expect the request
1234 p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1235 IP(src=self.pg3.remote_ip4, dst="255.255.255.255") /
1236 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1238 yiaddr=self.pg3.local_ip4,
1239 chaddr=mac_pton(self.pg3.local_mac)) /
1240 DHCP(options=[('message-type', 'offer'),
1241 ('server_id', self.pg3.remote_ip4),
1244 self.pg3.add_stream(p_offer)
1245 self.pg_enable_capture(self.pg_interfaces)
1248 rx = self.pg3.get_capture(1)
1249 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1253 # Send an acknowledgment
1255 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1256 IP(src=self.pg3.remote_ip4, dst="255.255.255.255") /
1257 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1258 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1259 chaddr=mac_pton(self.pg3.local_mac)) /
1260 DHCP(options=[('message-type', 'ack'),
1261 ('subnet_mask', "255.255.255.0"),
1262 ('router', self.pg3.remote_ip4),
1263 ('server_id', self.pg3.remote_ip4),
1264 ('lease_time', 43200),
1267 self.pg3.add_stream(p_ack)
1268 self.pg_enable_capture(self.pg_interfaces)
1272 # We'll get an ARP request for the router address
1274 rx = self.pg3.get_capture(1)
1276 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1277 self.pg_enable_capture(self.pg_interfaces)
1280 # At the end of this procedure there should be a connected route
1283 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1284 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1286 # remove the left over ARP entry
1287 self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index,
1288 self.pg3.remote_mac,
1289 self.pg3.remote_ip4,
1293 # remove the DHCP config
1295 Client.remove_vpp_config()
1298 # and now the route should be gone
1300 self.assertFalse(find_route(self, self.pg3.local_ip4, 32))
1301 self.assertFalse(find_route(self, self.pg3.local_ip4, 24))
1304 # Start the procedure again. this time have VPP send the client-ID
1305 # and set the DSCP value
1307 self.pg3.admin_down()
1310 Client.set_client(self.pg3.sw_if_index, hostname,
1311 id=self.pg3.local_mac,
1312 dscp=vdscp.IP_API_DSCP_EF)
1313 Client.add_vpp_config()
1315 rx = self.pg3.get_capture(1)
1317 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
1319 dscp=vdscp.IP_API_DSCP_EF)
1321 # TODO: VPP DHCP client should not accept DHCP OFFER message with
1322 # the XID (Transaction ID) not matching the XID of the most recent
1323 # DHCP DISCOVERY message.
1324 # Such DHCP OFFER message must be silently discarded - RFC2131.
1325 # Reported in Jira ticket: VPP-99
1326 self.pg3.add_stream(p_offer)
1327 self.pg_enable_capture(self.pg_interfaces)
1330 rx = self.pg3.get_capture(1)
1331 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1333 dscp=vdscp.IP_API_DSCP_EF)
1336 # unicast the ack to the offered address
1338 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1339 IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) /
1340 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1341 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1342 chaddr=mac_pton(self.pg3.local_mac)) /
1343 DHCP(options=[('message-type', 'ack'),
1344 ('subnet_mask', "255.255.255.0"),
1345 ('router', self.pg3.remote_ip4),
1346 ('server_id', self.pg3.remote_ip4),
1347 ('lease_time', 43200),
1350 self.pg3.add_stream(p_ack)
1351 self.pg_enable_capture(self.pg_interfaces)
1355 # We'll get an ARP request for the router address
1357 rx = self.pg3.get_capture(1)
1359 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1360 self.pg_enable_capture(self.pg_interfaces)
1363 # At the end of this procedure there should be a connected route
1366 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1367 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1370 # remove the DHCP config
1372 Client.remove_vpp_config()
1374 self.assertFalse(find_route(self, self.pg3.local_ip4, 32))
1375 self.assertFalse(find_route(self, self.pg3.local_ip4, 24))
1378 # Rince and repeat, this time with VPP configured not to set
1379 # the braodcast flag in the discover and request messages,
1380 # and for the server to unicast the responses.
1382 # Configure DHCP client on PG3 and capture the discover sent
1385 self.pg3.sw_if_index,
1387 set_broadcast_flag=False)
1388 Client.add_vpp_config()
1390 rx = self.pg3.get_capture(1)
1392 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
1396 # Send back on offer, unicasted to the offered address.
1397 # Expect the request.
1399 p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1400 IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) /
1401 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1402 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1403 chaddr=mac_pton(self.pg3.local_mac)) /
1404 DHCP(options=[('message-type', 'offer'),
1405 ('server_id', self.pg3.remote_ip4),
1408 self.pg3.add_stream(p_offer)
1409 self.pg_enable_capture(self.pg_interfaces)
1412 rx = self.pg3.get_capture(1)
1413 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1418 # Send an acknowledgment, the lease renewal time is 2 seconds
1419 # so we should expect the renew straight after
1421 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1422 IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) /
1423 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1424 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1425 chaddr=mac_pton(self.pg3.local_mac)) /
1426 DHCP(options=[('message-type', 'ack'),
1427 ('subnet_mask', "255.255.255.0"),
1428 ('router', self.pg3.remote_ip4),
1429 ('server_id', self.pg3.remote_ip4),
1430 ('lease_time', 43200),
1431 ('renewal_time', 2),
1434 self.pg3.add_stream(p_ack)
1435 self.pg_enable_capture(self.pg_interfaces)
1439 # We'll get an ARP request for the router address
1441 rx = self.pg3.get_capture(1)
1443 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1444 self.pg_enable_capture(self.pg_interfaces)
1447 # At the end of this procedure there should be a connected route
1450 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1451 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1454 # wait for the unicasted renewal
1455 # the first attempt will be an ARP packet, since we have not yet
1456 # responded to VPP's request
1458 self.logger.info(self.vapi.cli("sh dhcp client intfc pg3 verbose"))
1459 rx = self.pg3.get_capture(1, timeout=10)
1461 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1463 # respond to the arp
1464 p_arp = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1466 hwdst=self.pg3.local_mac,
1467 hwsrc=self.pg3.remote_mac,
1468 pdst=self.pg3.local_ip4,
1469 psrc=self.pg3.remote_ip4))
1470 self.pg3.add_stream(p_arp)
1471 self.pg_enable_capture(self.pg_interfaces)
1474 # the next packet is the unicasted renewal
1475 rx = self.pg3.get_capture(1, timeout=10)
1476 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1482 # read the DHCP client details from a dump
1484 clients = self.vapi.dhcp_client_dump()
1486 self.assertEqual(clients[0].client.sw_if_index,
1487 self.pg3.sw_if_index)
1488 self.assertEqual(clients[0].lease.sw_if_index,
1489 self.pg3.sw_if_index)
1490 self.assertEqual(clients[0].client.hostname.rstrip('\0'),
1492 self.assertEqual(clients[0].lease.hostname.rstrip('\0'),
1494 # 0 = DISCOVER, 1 = REQUEST, 2 = BOUND
1495 self.assertEqual(clients[0].lease.state, 2)
1496 self.assertEqual(clients[0].lease.mask_width, 24)
1497 self.assertEqual(str(clients[0].lease.router_address),
1498 self.pg3.remote_ip4)
1499 self.assertEqual(str(clients[0].lease.host_address),
1502 # remove the left over ARP entry
1503 self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index,
1504 self.pg3.remote_mac,
1505 self.pg3.remote_ip4,
1509 # remove the DHCP config
1511 Client.remove_vpp_config()
1514 # and now the route should be gone
1516 self.assertFalse(find_route(self, self.pg3.local_ip4, 32))
1517 self.assertFalse(find_route(self, self.pg3.local_ip4, 24))
1520 # Start the procedure again. Use requested lease time option.
1523 self.pg3.admin_down()
1526 self.pg_enable_capture(self.pg_interfaces)
1527 Client.set_client(self.pg3.sw_if_index, hostname)
1528 Client.add_vpp_config()
1530 rx = self.pg3.get_capture(1)
1532 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname)
1535 # Send back on offer with requested lease time, expect the request
1538 p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1539 IP(src=self.pg3.remote_ip4, dst='255.255.255.255') /
1540 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1542 yiaddr=self.pg3.local_ip4,
1543 chaddr=mac_pton(self.pg3.local_mac)) /
1544 DHCP(options=[('message-type', 'offer'),
1545 ('server_id', self.pg3.remote_ip4),
1546 ('lease_time', lease_time),
1549 self.pg3.add_stream(p_offer)
1550 self.pg_enable_capture(self.pg_interfaces)
1553 rx = self.pg3.get_capture(1)
1554 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1558 # Send an acknowledgment
1560 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1561 IP(src=self.pg3.remote_ip4, dst='255.255.255.255') /
1562 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1563 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1564 chaddr=mac_pton(self.pg3.local_mac)) /
1565 DHCP(options=[('message-type', 'ack'),
1566 ('subnet_mask', '255.255.255.0'),
1567 ('router', self.pg3.remote_ip4),
1568 ('server_id', self.pg3.remote_ip4),
1569 ('lease_time', lease_time),
1572 self.pg3.add_stream(p_ack)
1573 self.pg_enable_capture(self.pg_interfaces)
1577 # We'll get an ARP request for the router address
1579 rx = self.pg3.get_capture(1)
1581 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1584 # At the end of this procedure there should be a connected route
1587 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1588 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1590 # remove the left over ARP entry
1591 self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index,
1592 self.pg3.remote_mac,
1593 self.pg3.remote_ip4,
1597 # the route should be gone after the lease expires
1599 self.assertTrue(self.wait_for_no_route(self.pg3.local_ip4, 32))
1600 self.assertTrue(self.wait_for_no_route(self.pg3.local_ip4, 24))
1603 # remove the DHCP config
1605 Client.remove_vpp_config()
1607 def test_dhcp_client_vlan(self):
1608 """ DHCP Client w/ VLAN"""
1610 vdscp = VppEnum.vl_api_ip_dscp_t
1611 vqos = VppEnum.vl_api_qos_source_t
1612 hostname = 'universal-dp'
1614 self.pg_enable_capture(self.pg_interfaces)
1616 vlan_100 = VppDot1QSubint(self, self.pg3, 100)
1619 output = [scapy.compat.chb(4)] * 256
1620 os = b''.join(output)
1621 rows = [{'outputs': os},
1626 qem1 = VppQosEgressMap(self, 1, rows).add_vpp_config()
1627 qm1 = VppQosMark(self, vlan_100, qem1,
1628 vqos.QOS_API_SOURCE_VLAN).add_vpp_config()
1631 # Configure DHCP client on PG3 and capture the discover sent
1633 Client = VppDHCPClient(
1635 vlan_100.sw_if_index,
1637 dscp=vdscp.IP_API_DSCP_EF)
1638 Client.add_vpp_config()
1640 rx = self.pg3.get_capture(1)
1642 self.assertEqual(rx[0][Dot1Q].vlan, 100)
1643 self.assertEqual(rx[0][Dot1Q].prio, 2)
1645 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
1646 dscp=vdscp.IP_API_DSCP_EF)
1649 if __name__ == '__main__':
1650 unittest.main(testRunner=VppTestRunner)