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
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 util import mactobinary
25 DHCP4_CLIENT_PORT = 68
26 DHCP4_SERVER_PORT = 67
27 DHCP6_CLIENT_PORT = 547
28 DHCP6_SERVER_PORT = 546
31 class TestDHCP(VppTestCase):
32 """ DHCP Test Case """
35 super(TestDHCP, self).setUp()
37 # create 6 pg interfaces for pg0 to pg5
38 self.create_pg_interfaces(range(6))
41 # pg0 to 2 are IP configured in VRF 0, 1 and 2.
42 # pg3 to 5 are non IP-configured in VRF 0, 1 and 2.
44 for table_id in range(1, 4):
45 tbl4 = VppIpTable(self, table_id)
47 self.tables.append(tbl4)
48 tbl6 = VppIpTable(self, table_id, is_ip6=1)
50 self.tables.append(tbl6)
53 for i in self.pg_interfaces[:3]:
55 i.set_table_ip4(table_id)
56 i.set_table_ip6(table_id)
64 for i in self.pg_interfaces[3:]:
66 i.set_table_ip4(table_id)
67 i.set_table_ip6(table_id)
71 for i in self.pg_interfaces[:3]:
75 for i in self.pg_interfaces:
79 super(TestDHCP, self).tearDown()
81 def verify_dhcp_has_option(self, pkt, option, value):
85 for i in dhcp.options:
88 self.assertEqual(i[1], value)
91 self.assertTrue(found)
93 def validate_relay_options(self, pkt, intf, ip_addr, vpn_id, fib_id, oui):
99 for i in dhcp.options:
101 if i[0] == "relay_agent_Information":
103 # There are two sb-options present - each of length 6.
107 self.assertEqual(len(data), 24)
108 elif len(vpn_id) > 0:
109 self.assertEqual(len(data), len(vpn_id)+17)
111 self.assertEqual(len(data), 12)
114 # First sub-option is ID 1, len 4, then encoded
115 # sw_if_index. This test uses low valued indicies
117 # The ID space is VPP internal - so no matching value
120 self.assertEqual(ord(data[0]), 1)
121 self.assertEqual(ord(data[1]), 4)
122 self.assertEqual(ord(data[2]), 0)
123 self.assertEqual(ord(data[3]), 0)
124 self.assertEqual(ord(data[4]), 0)
125 self.assertEqual(ord(data[5]), intf._sw_if_index)
128 # next sub-option is the IP address of the client side
130 # sub-option ID=5, length (of a v4 address)=4
132 claddr = socket.inet_pton(AF_INET, ip_addr)
134 self.assertEqual(ord(data[6]), 5)
135 self.assertEqual(ord(data[7]), 4)
136 self.assertEqual(data[8], claddr[0])
137 self.assertEqual(data[9], claddr[1])
138 self.assertEqual(data[10], claddr[2])
139 self.assertEqual(data[11], claddr[3])
142 # sub-option 151 encodes vss_type 1,
143 # the 3 byte oui and the 4 byte fib_id
144 self.assertEqual(id_len, 0)
145 self.assertEqual(ord(data[12]), 151)
146 self.assertEqual(ord(data[13]), 8)
147 self.assertEqual(ord(data[14]), 1)
148 self.assertEqual(ord(data[15]), 0)
149 self.assertEqual(ord(data[16]), 0)
150 self.assertEqual(ord(data[17]), oui)
151 self.assertEqual(ord(data[18]), 0)
152 self.assertEqual(ord(data[19]), 0)
153 self.assertEqual(ord(data[20]), 0)
154 self.assertEqual(ord(data[21]), fib_id)
156 # VSS control sub-option
157 self.assertEqual(ord(data[22]), 152)
158 self.assertEqual(ord(data[23]), 0)
161 # sub-option 151 encode vss_type of 0
162 # followerd by vpn_id in ascii
163 self.assertEqual(oui, 0)
164 self.assertEqual(ord(data[12]), 151)
165 self.assertEqual(ord(data[13]), id_len+1)
166 self.assertEqual(ord(data[14]), 0)
167 self.assertEqual(data[15:15+id_len], vpn_id)
169 # VSS control sub-option
170 self.assertEqual(ord(data[15+len(vpn_id)]), 152)
171 self.assertEqual(ord(data[16+len(vpn_id)]), 0)
174 self.assertTrue(found)
178 def verify_dhcp_msg_type(self, pkt, name):
181 for o in dhcp.options:
183 if o[0] == "message-type" \
184 and DHCPTypes[o[1]] == name:
186 self.assertTrue(found)
188 def verify_dhcp_offer(self, pkt, intf, vpn_id="", fib_id=0, oui=0):
190 self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
191 self.assertEqual(ether.src, intf.local_mac)
194 self.assertEqual(ip.dst, "255.255.255.255")
195 self.assertEqual(ip.src, intf.local_ip4)
198 self.assertEqual(udp.dport, DHCP4_CLIENT_PORT)
199 self.assertEqual(udp.sport, DHCP4_SERVER_PORT)
201 self.verify_dhcp_msg_type(pkt, "offer")
202 data = self.validate_relay_options(pkt, intf, intf.local_ip4,
205 def verify_orig_dhcp_pkt(self, pkt, intf):
207 self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
208 self.assertEqual(ether.src, intf.local_mac)
211 self.assertEqual(ip.dst, "255.255.255.255")
212 self.assertEqual(ip.src, "0.0.0.0")
215 self.assertEqual(udp.dport, DHCP4_SERVER_PORT)
216 self.assertEqual(udp.sport, DHCP4_CLIENT_PORT)
218 def verify_orig_dhcp_discover(self, pkt, intf, hostname, client_id=None,
220 self.verify_orig_dhcp_pkt(pkt, intf)
222 self.verify_dhcp_msg_type(pkt, "discover")
223 self.verify_dhcp_has_option(pkt, "hostname", hostname)
225 self.verify_dhcp_has_option(pkt, "client_id", client_id)
227 self.assertEqual(bootp.ciaddr, "0.0.0.0")
228 self.assertEqual(bootp.giaddr, "0.0.0.0")
230 self.assertEqual(bootp.flags, 0x8000)
232 self.assertEqual(bootp.flags, 0x0000)
234 def verify_orig_dhcp_request(self, pkt, intf, hostname, ip,
236 self.verify_orig_dhcp_pkt(pkt, intf)
238 self.verify_dhcp_msg_type(pkt, "request")
239 self.verify_dhcp_has_option(pkt, "hostname", hostname)
240 self.verify_dhcp_has_option(pkt, "requested_addr", ip)
242 self.assertEqual(bootp.ciaddr, "0.0.0.0")
243 self.assertEqual(bootp.giaddr, "0.0.0.0")
245 self.assertEqual(bootp.flags, 0x8000)
247 self.assertEqual(bootp.flags, 0x0000)
249 def verify_relayed_dhcp_discover(self, pkt, intf, src_intf=None,
252 dst_mac=None, dst_ip=None):
254 dst_mac = intf.remote_mac
256 dst_ip = intf.remote_ip4
259 self.assertEqual(ether.dst, dst_mac)
260 self.assertEqual(ether.src, intf.local_mac)
263 self.assertEqual(ip.dst, dst_ip)
264 self.assertEqual(ip.src, intf.local_ip4)
267 self.assertEqual(udp.dport, DHCP4_SERVER_PORT)
268 self.assertEqual(udp.sport, DHCP4_CLIENT_PORT)
273 for o in dhcp.options:
275 if o[0] == "message-type" \
276 and DHCPTypes[o[1]] == "discover":
278 self.assertTrue(is_discover)
280 data = self.validate_relay_options(pkt, src_intf,
286 def verify_dhcp6_solicit(self, pkt, intf,
294 dst_mac = intf.remote_mac
296 dst_ip = in6_ptop(intf.remote_ip6)
299 self.assertEqual(ether.dst, dst_mac)
300 self.assertEqual(ether.src, intf.local_mac)
303 self.assertEqual(in6_ptop(ip.dst), dst_ip)
304 self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6))
307 self.assertEqual(udp.dport, DHCP6_CLIENT_PORT)
308 self.assertEqual(udp.sport, DHCP6_SERVER_PORT)
310 relay = pkt[DHCP6_RelayForward]
311 self.assertEqual(in6_ptop(relay.peeraddr), in6_ptop(peer_ip))
312 oid = pkt[DHCP6OptIfaceId]
313 cll = pkt[DHCP6OptClientLinkLayerAddr]
314 self.assertEqual(cll.optlen, 8)
315 self.assertEqual(cll.lltype, 1)
316 self.assertEqual(cll.clladdr, peer_mac)
321 self.assertEqual(id_len, 0)
322 vss = pkt[DHCP6OptVSS]
323 self.assertEqual(vss.optlen, 8)
324 self.assertEqual(vss.type, 1)
325 # the OUI and FIB-id are really 3 and 4 bytes resp.
326 # but the tested range is small
327 self.assertEqual(ord(vss.data[0]), 0)
328 self.assertEqual(ord(vss.data[1]), 0)
329 self.assertEqual(ord(vss.data[2]), oui)
330 self.assertEqual(ord(vss.data[3]), 0)
331 self.assertEqual(ord(vss.data[4]), 0)
332 self.assertEqual(ord(vss.data[5]), 0)
333 self.assertEqual(ord(vss.data[6]), fib_id)
336 self.assertEqual(oui, 0)
337 vss = pkt[DHCP6OptVSS]
338 self.assertEqual(vss.optlen, id_len+1)
339 self.assertEqual(vss.type, 0)
340 self.assertEqual(vss.data[0:id_len], vpn_id)
342 # the relay message should be an encoded Solicit
343 msg = pkt[DHCP6OptRelayMsg]
344 sol = DHCP6_Solicit()
345 self.assertEqual(msg.optlen, len(str(sol)))
346 self.assertEqual(str(sol), (str(msg[1]))[:msg.optlen])
348 def verify_dhcp6_advert(self, pkt, intf, peer):
350 self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
351 self.assertEqual(ether.src, intf.local_mac)
354 self.assertEqual(in6_ptop(ip.dst), in6_ptop(peer))
355 self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6))
358 self.assertEqual(udp.dport, DHCP6_SERVER_PORT)
359 self.assertEqual(udp.sport, DHCP6_CLIENT_PORT)
361 # not sure why this is not decoding
362 # adv = pkt[DHCP6_Advertise]
364 def test_dhcp_proxy(self):
368 # Verify no response to DHCP request without DHCP config
370 p_disc_vrf0 = (Ether(dst="ff:ff:ff:ff:ff:ff",
371 src=self.pg3.remote_mac) /
372 IP(src="0.0.0.0", dst="255.255.255.255") /
373 UDP(sport=DHCP4_CLIENT_PORT,
374 dport=DHCP4_SERVER_PORT) /
376 DHCP(options=[('message-type', 'discover'), ('end')]))
377 pkts_disc_vrf0 = [p_disc_vrf0]
378 p_disc_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff",
379 src=self.pg4.remote_mac) /
380 IP(src="0.0.0.0", dst="255.255.255.255") /
381 UDP(sport=DHCP4_CLIENT_PORT,
382 dport=DHCP4_SERVER_PORT) /
384 DHCP(options=[('message-type', 'discover'), ('end')]))
385 pkts_disc_vrf1 = [p_disc_vrf1]
386 p_disc_vrf2 = (Ether(dst="ff:ff:ff:ff:ff:ff",
387 src=self.pg5.remote_mac) /
388 IP(src="0.0.0.0", dst="255.255.255.255") /
389 UDP(sport=DHCP4_CLIENT_PORT,
390 dport=DHCP4_SERVER_PORT) /
392 DHCP(options=[('message-type', 'discover'), ('end')]))
393 pkts_disc_vrf2 = [p_disc_vrf2]
395 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
396 "DHCP with no configuration")
397 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
398 "DHCP with no configuration")
399 self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
400 "DHCP with no configuration")
403 # Enable DHCP proxy in VRF 0
405 server_addr = self.pg0.remote_ip4n
406 src_addr = self.pg0.local_ip4n
408 self.vapi.dhcp_proxy_config(server_addr,
413 # Discover packets from the client are dropped because there is no
414 # IP address configured on the client facing interface
416 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
417 "Discover DHCP no relay address")
420 # Inject a response from the server
421 # dropped, because there is no IP addrees on the
422 # client interfce to fill in the option.
424 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
425 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
426 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
428 DHCP(options=[('message-type', 'offer'), ('end')]))
431 self.send_and_assert_no_replies(self.pg3, pkts,
432 "Offer DHCP no relay address")
435 # configure an IP address on the client facing interface
437 self.pg3.config_ip4()
440 # Try again with a discover packet
441 # Rx'd packet should be to the server address and from the configured
443 # UDP source ports are unchanged
444 # we've no option 82 config so that should be absent
446 self.pg3.add_stream(pkts_disc_vrf0)
447 self.pg_enable_capture(self.pg_interfaces)
450 rx = self.pg0.get_capture(1)
453 option_82 = self.verify_relayed_dhcp_discover(rx, self.pg0,
457 # Create an DHCP offer reply from the server with a correctly formatted
458 # option 82. i.e. send back what we just captured
459 # The offer, sent mcast to the client, still has option 82.
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'),
466 ('relay_agent_Information', option_82),
470 self.pg0.add_stream(pkts)
471 self.pg_enable_capture(self.pg_interfaces)
474 rx = self.pg3.get_capture(1)
477 self.verify_dhcp_offer(rx, self.pg3)
482 # 1. not our IP address = not checked by VPP? so offer is replayed
484 bad_ip = option_82[0:8] + chr(33) + option_82[9:]
486 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
487 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
488 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
490 DHCP(options=[('message-type', 'offer'),
491 ('relay_agent_Information', bad_ip),
494 self.send_and_assert_no_replies(self.pg0, pkts,
495 "DHCP offer option 82 bad address")
497 # 2. Not a sw_if_index VPP knows
498 bad_if_index = option_82[0:2] + chr(33) + option_82[3:]
500 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
501 IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
502 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
504 DHCP(options=[('message-type', 'offer'),
505 ('relay_agent_Information', bad_if_index),
508 self.send_and_assert_no_replies(self.pg0, pkts,
509 "DHCP offer option 82 bad if index")
512 # Send a DHCP request in VRF 1. should be dropped.
514 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
515 "DHCP with no configuration VRF 1")
518 # Delete the DHCP config in VRF 0
519 # Should now drop requests.
521 self.vapi.dhcp_proxy_config(server_addr,
526 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
527 "DHCP config removed VRF 0")
528 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
529 "DHCP config removed VRF 1")
532 # Add DHCP config for VRF 1 & 2
534 server_addr1 = self.pg1.remote_ip4n
535 src_addr1 = self.pg1.local_ip4n
536 self.vapi.dhcp_proxy_config(server_addr1,
540 server_addr2 = self.pg2.remote_ip4n
541 src_addr2 = self.pg2.local_ip4n
542 self.vapi.dhcp_proxy_config(server_addr2,
548 # Confim DHCP requests ok in VRF 1 & 2.
549 # - dropped on IP config on client interface
551 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
552 "DHCP config removed VRF 1")
553 self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
554 "DHCP config removed VRF 2")
557 # configure an IP address on the client facing interface
559 self.pg4.config_ip4()
560 self.pg4.add_stream(pkts_disc_vrf1)
561 self.pg_enable_capture(self.pg_interfaces)
563 rx = self.pg1.get_capture(1)
565 self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4)
567 self.pg5.config_ip4()
568 self.pg5.add_stream(pkts_disc_vrf2)
569 self.pg_enable_capture(self.pg_interfaces)
571 rx = self.pg2.get_capture(1)
573 self.verify_relayed_dhcp_discover(rx, self.pg2, src_intf=self.pg5)
577 # table=1, vss_type=1, vpn_index=1, oui=4
578 # table=2, vss_type=0, vpn_id = "ip4-table-2"
579 self.vapi.dhcp_proxy_set_vss(1, 1, vpn_index=1, oui=4, is_add=1)
580 self.vapi.dhcp_proxy_set_vss(2, 0, "ip4-table-2", is_add=1)
582 self.pg4.add_stream(pkts_disc_vrf1)
583 self.pg_enable_capture(self.pg_interfaces)
586 rx = self.pg1.get_capture(1)
588 self.verify_relayed_dhcp_discover(rx, self.pg1,
592 self.pg5.add_stream(pkts_disc_vrf2)
593 self.pg_enable_capture(self.pg_interfaces)
596 rx = self.pg2.get_capture(1)
598 self.verify_relayed_dhcp_discover(rx, self.pg2,
600 vpn_id="ip4-table-2")
603 # Add a second DHCP server in VRF 1
604 # expect clients messages to be relay to both configured servers
606 self.pg1.generate_remote_hosts(2)
607 server_addr12 = socket.inet_pton(AF_INET, self.pg1.remote_hosts[1].ip4)
609 self.vapi.dhcp_proxy_config(server_addr12,
616 # We'll need an ARP entry for the server to send it packets
618 arp_entry = VppNeighbor(self,
619 self.pg1.sw_if_index,
620 self.pg1.remote_hosts[1].mac,
621 self.pg1.remote_hosts[1].ip4)
622 arp_entry.add_vpp_config()
625 # Send a discover from the client. expect two relayed messages
626 # The frist packet is sent to the second server
627 # We're not enforcing that here, it's just the way it is.
629 self.pg4.add_stream(pkts_disc_vrf1)
630 self.pg_enable_capture(self.pg_interfaces)
633 rx = self.pg1.get_capture(2)
635 option_82 = self.verify_relayed_dhcp_discover(
638 dst_mac=self.pg1.remote_hosts[1].mac,
639 dst_ip=self.pg1.remote_hosts[1].ip4,
641 self.verify_relayed_dhcp_discover(rx[1], self.pg1,
646 # Send both packets back. Client gets both.
648 p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
649 IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) /
650 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
652 DHCP(options=[('message-type', 'offer'),
653 ('relay_agent_Information', option_82),
655 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
656 IP(src=self.pg1.remote_hosts[1].ip4, dst=self.pg1.local_ip4) /
657 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
659 DHCP(options=[('message-type', 'offer'),
660 ('relay_agent_Information', option_82),
664 self.pg1.add_stream(pkts)
665 self.pg_enable_capture(self.pg_interfaces)
668 rx = self.pg4.get_capture(2)
670 self.verify_dhcp_offer(rx[0], self.pg4, fib_id=1, oui=4)
671 self.verify_dhcp_offer(rx[1], self.pg4, fib_id=1, oui=4)
674 # Ensure offers from non-servers are dropeed
676 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
677 IP(src="8.8.8.8", dst=self.pg1.local_ip4) /
678 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
680 DHCP(options=[('message-type', 'offer'),
681 ('relay_agent_Information', option_82),
683 self.send_and_assert_no_replies(self.pg1, p2,
684 "DHCP offer from non-server")
687 # Ensure only the discover is sent to multiple servers
689 p_req_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff",
690 src=self.pg4.remote_mac) /
691 IP(src="0.0.0.0", dst="255.255.255.255") /
692 UDP(sport=DHCP4_CLIENT_PORT,
693 dport=DHCP4_SERVER_PORT) /
695 DHCP(options=[('message-type', 'request'),
698 self.pg4.add_stream(p_req_vrf1)
699 self.pg_enable_capture(self.pg_interfaces)
702 rx = self.pg1.get_capture(1)
705 # Remove the second DHCP server
707 self.vapi.dhcp_proxy_config(server_addr12,
714 # Test we can still relay with the first
716 self.pg4.add_stream(pkts_disc_vrf1)
717 self.pg_enable_capture(self.pg_interfaces)
720 rx = self.pg1.get_capture(1)
722 self.verify_relayed_dhcp_discover(rx, self.pg1,
727 # Remove the VSS config
728 # relayed DHCP has default vlaues in the option.
730 self.vapi.dhcp_proxy_set_vss(1, is_add=0)
731 self.vapi.dhcp_proxy_set_vss(2, is_add=0)
733 self.pg4.add_stream(pkts_disc_vrf1)
734 self.pg_enable_capture(self.pg_interfaces)
737 rx = self.pg1.get_capture(1)
739 self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4)
742 # remove DHCP config to cleanup
744 self.vapi.dhcp_proxy_config(server_addr1,
749 self.vapi.dhcp_proxy_config(server_addr2,
755 self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0,
756 "DHCP cleanup VRF 0")
757 self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1,
758 "DHCP cleanup VRF 1")
759 self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2,
760 "DHCP cleanup VRF 2")
762 self.pg3.unconfig_ip4()
763 self.pg4.unconfig_ip4()
764 self.pg5.unconfig_ip4()
766 def test_dhcp6_proxy(self):
769 # Verify no response to DHCP request without DHCP config
771 dhcp_solicit_dst = "ff02::1:2"
772 dhcp_solicit_src_vrf0 = mk_ll_addr(self.pg3.remote_mac)
773 dhcp_solicit_src_vrf1 = mk_ll_addr(self.pg4.remote_mac)
774 dhcp_solicit_src_vrf2 = mk_ll_addr(self.pg5.remote_mac)
775 server_addr_vrf0 = self.pg0.remote_ip6n
776 src_addr_vrf0 = self.pg0.local_ip6n
777 server_addr_vrf1 = self.pg1.remote_ip6n
778 src_addr_vrf1 = self.pg1.local_ip6n
779 server_addr_vrf2 = self.pg2.remote_ip6n
780 src_addr_vrf2 = self.pg2.local_ip6n
782 dmac = in6_getnsmac(inet_pton(socket.AF_INET6, dhcp_solicit_dst))
783 p_solicit_vrf0 = (Ether(dst=dmac, src=self.pg3.remote_mac) /
784 IPv6(src=dhcp_solicit_src_vrf0,
785 dst=dhcp_solicit_dst) /
786 UDP(sport=DHCP6_SERVER_PORT,
787 dport=DHCP6_CLIENT_PORT) /
789 p_solicit_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) /
790 IPv6(src=dhcp_solicit_src_vrf1,
791 dst=dhcp_solicit_dst) /
792 UDP(sport=DHCP6_SERVER_PORT,
793 dport=DHCP6_CLIENT_PORT) /
795 p_solicit_vrf2 = (Ether(dst=dmac, src=self.pg5.remote_mac) /
796 IPv6(src=dhcp_solicit_src_vrf2,
797 dst=dhcp_solicit_dst) /
798 UDP(sport=DHCP6_SERVER_PORT,
799 dport=DHCP6_CLIENT_PORT) /
802 self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0,
803 "DHCP with no configuration")
804 self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1,
805 "DHCP with no configuration")
806 self.send_and_assert_no_replies(self.pg5, p_solicit_vrf2,
807 "DHCP with no configuration")
810 # DHCPv6 config in VRF 0.
811 # Packets still dropped because the client facing interface has no
814 self.vapi.dhcp_proxy_config(server_addr_vrf0,
820 self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0,
821 "DHCP with no configuration")
822 self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1,
823 "DHCP with no configuration")
826 # configure an IP address on the client facing interface
828 self.pg3.config_ip6()
831 # Now the DHCP requests are relayed to the server
833 self.pg3.add_stream(p_solicit_vrf0)
834 self.pg_enable_capture(self.pg_interfaces)
837 rx = self.pg0.get_capture(1)
839 self.verify_dhcp6_solicit(rx[0], self.pg0,
840 dhcp_solicit_src_vrf0,
844 # Exception cases for rejected relay responses
847 # 1 - not a relay reply
848 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
849 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
850 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
852 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
853 "DHCP6 not a relay reply")
855 # 2 - no relay message option
856 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
857 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
858 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
861 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
862 "DHCP not a relay message")
865 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
866 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
867 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
869 DHCP6OptRelayMsg(optlen=0) /
871 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
872 "DHCP6 no circuit ID")
873 # 4 - wrong circuit ID
874 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
875 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
876 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
878 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
879 DHCP6OptRelayMsg(optlen=0) /
881 self.send_and_assert_no_replies(self.pg3, p_adv_vrf0,
882 "DHCP6 wrong circuit ID")
885 # Send the relay response (the advertisement)
887 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
888 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
889 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
891 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
892 DHCP6OptRelayMsg(optlen=0) /
893 DHCP6_Advertise(trid=1) /
894 DHCP6OptStatusCode(statuscode=0))
895 pkts_adv_vrf0 = [p_adv_vrf0]
897 self.pg0.add_stream(pkts_adv_vrf0)
898 self.pg_enable_capture(self.pg_interfaces)
901 rx = self.pg3.get_capture(1)
903 self.verify_dhcp6_advert(rx[0], self.pg3, "::")
906 # Send the relay response (the advertisement)
907 # - with peer address
908 p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
909 IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
910 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
911 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf0) /
912 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
913 DHCP6OptRelayMsg(optlen=0) /
914 DHCP6_Advertise(trid=1) /
915 DHCP6OptStatusCode(statuscode=0))
916 pkts_adv_vrf0 = [p_adv_vrf0]
918 self.pg0.add_stream(pkts_adv_vrf0)
919 self.pg_enable_capture(self.pg_interfaces)
922 rx = self.pg3.get_capture(1)
924 self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf0)
927 # Add all the config for VRF 1 & 2
929 self.vapi.dhcp_proxy_config(server_addr_vrf1,
934 self.pg4.config_ip6()
936 self.vapi.dhcp_proxy_config(server_addr_vrf2,
941 self.pg5.config_ip6()
946 self.pg4.add_stream(p_solicit_vrf1)
947 self.pg_enable_capture(self.pg_interfaces)
950 rx = self.pg1.get_capture(1)
952 self.verify_dhcp6_solicit(rx[0], self.pg1,
953 dhcp_solicit_src_vrf1,
959 self.pg5.add_stream(p_solicit_vrf2)
960 self.pg_enable_capture(self.pg_interfaces)
963 rx = self.pg2.get_capture(1)
965 self.verify_dhcp6_solicit(rx[0], self.pg2,
966 dhcp_solicit_src_vrf2,
972 p_adv_vrf1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
973 IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) /
974 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
975 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
976 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
977 DHCP6OptRelayMsg(optlen=0) /
978 DHCP6_Advertise(trid=1) /
979 DHCP6OptStatusCode(statuscode=0))
980 pkts_adv_vrf1 = [p_adv_vrf1]
982 self.pg1.add_stream(pkts_adv_vrf1)
983 self.pg_enable_capture(self.pg_interfaces)
986 rx = self.pg4.get_capture(1)
988 self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1)
992 # table=1, vss_type=1, vpn_index=1, oui=4
993 # table=2, vss_type=0, vpn_id = "ip6-table-2"
994 self.vapi.dhcp_proxy_set_vss(1, 1, oui=4, vpn_index=1, is_ip6=1)
995 self.vapi.dhcp_proxy_set_vss(2, 0, "IPv6-table-2", is_ip6=1)
997 self.pg4.add_stream(p_solicit_vrf1)
998 self.pg_enable_capture(self.pg_interfaces)
1001 rx = self.pg1.get_capture(1)
1003 self.verify_dhcp6_solicit(rx[0], self.pg1,
1004 dhcp_solicit_src_vrf1,
1005 self.pg4.remote_mac,
1009 self.pg5.add_stream(p_solicit_vrf2)
1010 self.pg_enable_capture(self.pg_interfaces)
1013 rx = self.pg2.get_capture(1)
1015 self.verify_dhcp6_solicit(rx[0], self.pg2,
1016 dhcp_solicit_src_vrf2,
1017 self.pg5.remote_mac,
1018 vpn_id="IPv6-table-2")
1021 # Remove the VSS config
1022 # relayed DHCP has default vlaues in the option.
1024 self.vapi.dhcp_proxy_set_vss(1, is_ip6=1, is_add=0)
1026 self.pg4.add_stream(p_solicit_vrf1)
1027 self.pg_enable_capture(self.pg_interfaces)
1030 rx = self.pg1.get_capture(1)
1032 self.verify_dhcp6_solicit(rx[0], self.pg1,
1033 dhcp_solicit_src_vrf1,
1034 self.pg4.remote_mac)
1037 # Add a second DHCP server in VRF 1
1038 # expect clients messages to be relay to both configured servers
1040 self.pg1.generate_remote_hosts(2)
1041 server_addr12 = socket.inet_pton(AF_INET6,
1042 self.pg1.remote_hosts[1].ip6)
1044 self.vapi.dhcp_proxy_config(server_addr12,
1051 # We'll need an ND entry for the server to send it packets
1053 nd_entry = VppNeighbor(self,
1054 self.pg1.sw_if_index,
1055 self.pg1.remote_hosts[1].mac,
1056 self.pg1.remote_hosts[1].ip6,
1058 nd_entry.add_vpp_config()
1061 # Send a discover from the client. expect two relayed messages
1062 # The frist packet is sent to the second server
1063 # We're not enforcing that here, it's just the way it is.
1065 self.pg4.add_stream(p_solicit_vrf1)
1066 self.pg_enable_capture(self.pg_interfaces)
1069 rx = self.pg1.get_capture(2)
1071 self.verify_dhcp6_solicit(rx[0], self.pg1,
1072 dhcp_solicit_src_vrf1,
1073 self.pg4.remote_mac)
1074 self.verify_dhcp6_solicit(rx[1], self.pg1,
1075 dhcp_solicit_src_vrf1,
1076 self.pg4.remote_mac,
1077 dst_mac=self.pg1.remote_hosts[1].mac,
1078 dst_ip=self.pg1.remote_hosts[1].ip6)
1081 # Send both packets back. Client gets both.
1083 p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1084 IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) /
1085 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
1086 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
1087 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
1088 DHCP6OptRelayMsg(optlen=0) /
1089 DHCP6_Advertise(trid=1) /
1090 DHCP6OptStatusCode(statuscode=0))
1091 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
1092 IPv6(dst=self.pg1.local_ip6, src=self.pg1._remote_hosts[1].ip6) /
1093 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
1094 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
1095 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
1096 DHCP6OptRelayMsg(optlen=0) /
1097 DHCP6_Advertise(trid=1) /
1098 DHCP6OptStatusCode(statuscode=0))
1102 self.pg1.add_stream(pkts)
1103 self.pg_enable_capture(self.pg_interfaces)
1106 rx = self.pg4.get_capture(2)
1108 self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1)
1109 self.verify_dhcp6_advert(rx[1], self.pg4, dhcp_solicit_src_vrf1)
1112 # Ensure only solicit messages are duplicated
1114 p_request_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) /
1115 IPv6(src=dhcp_solicit_src_vrf1,
1116 dst=dhcp_solicit_dst) /
1117 UDP(sport=DHCP6_SERVER_PORT,
1118 dport=DHCP6_CLIENT_PORT) /
1121 self.pg4.add_stream(p_request_vrf1)
1122 self.pg_enable_capture(self.pg_interfaces)
1125 rx = self.pg1.get_capture(1)
1128 # Test we drop DHCP packets from addresses that are not configured as
1131 p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
1132 IPv6(dst=self.pg1.local_ip6, src="3001::1") /
1133 UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
1134 DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
1135 DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
1136 DHCP6OptRelayMsg(optlen=0) /
1137 DHCP6_Advertise(trid=1) /
1138 DHCP6OptStatusCode(statuscode=0))
1139 self.send_and_assert_no_replies(self.pg1, p2,
1140 "DHCP6 not from server")
1143 # Remove the second DHCP server
1145 self.vapi.dhcp_proxy_config(server_addr12,
1153 # Test we can still relay with the first
1155 self.pg4.add_stream(p_solicit_vrf1)
1156 self.pg_enable_capture(self.pg_interfaces)
1159 rx = self.pg1.get_capture(1)
1161 self.verify_dhcp6_solicit(rx[0], self.pg1,
1162 dhcp_solicit_src_vrf1,
1163 self.pg4.remote_mac)
1168 self.vapi.dhcp_proxy_config(server_addr_vrf2,
1174 self.vapi.dhcp_proxy_config(server_addr_vrf1,
1180 self.vapi.dhcp_proxy_config(server_addr_vrf0,
1188 self.vapi.dhcp_proxy_config(server_addr_vrf0,
1194 self.pg3.unconfig_ip6()
1195 self.pg4.unconfig_ip6()
1196 self.pg5.unconfig_ip6()
1198 def test_dhcp_client(self):
1201 hostname = 'universal-dp'
1203 self.pg_enable_capture(self.pg_interfaces)
1206 # Configure DHCP client on PG3 and capture the discover sent
1208 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname)
1210 rx = self.pg3.get_capture(1)
1212 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname)
1215 # Send back on offer, expect the request
1217 p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1218 IP(src=self.pg3.remote_ip4, dst="255.255.255.255") /
1219 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1221 yiaddr=self.pg3.local_ip4,
1222 chaddr=mactobinary(self.pg3.local_mac)) /
1223 DHCP(options=[('message-type', 'offer'),
1224 ('server_id', self.pg3.remote_ip4),
1227 self.pg3.add_stream(p_offer)
1228 self.pg_enable_capture(self.pg_interfaces)
1231 rx = self.pg3.get_capture(1)
1232 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1236 # Send an acknowledgment
1238 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1239 IP(src=self.pg3.remote_ip4, dst="255.255.255.255") /
1240 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1241 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1242 chaddr=mactobinary(self.pg3.local_mac)) /
1243 DHCP(options=[('message-type', 'ack'),
1244 ('subnet_mask', "255.255.255.0"),
1245 ('router', self.pg3.remote_ip4),
1246 ('server_id', self.pg3.remote_ip4),
1247 ('lease_time', 43200),
1250 self.pg3.add_stream(p_ack)
1251 self.pg_enable_capture(self.pg_interfaces)
1255 # We'll get an ARP request for the router address
1257 rx = self.pg3.get_capture(1)
1259 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1260 self.pg_enable_capture(self.pg_interfaces)
1263 # At the end of this procedure there should be a connected route
1266 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1267 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1269 # remove the left over ARP entry
1270 self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index,
1271 mactobinary(self.pg3.remote_mac),
1272 self.pg3.remote_ip4,
1275 # remove the DHCP config
1277 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0)
1280 # and now the route should be gone
1282 self.assertFalse(find_route(self, self.pg3.local_ip4, 32))
1283 self.assertFalse(find_route(self, self.pg3.local_ip4, 24))
1286 # Start the procedure again. this time have VPP send the client-ID
1288 self.pg3.admin_down()
1291 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname,
1292 client_id=self.pg3.local_mac)
1294 rx = self.pg3.get_capture(1)
1296 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
1299 # TODO: VPP DHCP client should not accept DHCP OFFER message with
1300 # the XID (Transaction ID) not matching the XID of the most recent
1301 # DHCP DISCOVERY message.
1302 # Such DHCP OFFER message must be silently discarded - RFC2131.
1303 # Reported in Jira ticket: VPP-99
1304 self.pg3.add_stream(p_offer)
1305 self.pg_enable_capture(self.pg_interfaces)
1308 rx = self.pg3.get_capture(1)
1309 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1313 # unicast the ack to the offered address
1315 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1316 IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) /
1317 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1318 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1319 chaddr=mactobinary(self.pg3.local_mac)) /
1320 DHCP(options=[('message-type', 'ack'),
1321 ('subnet_mask', "255.255.255.0"),
1322 ('router', self.pg3.remote_ip4),
1323 ('server_id', self.pg3.remote_ip4),
1324 ('lease_time', 43200),
1327 self.pg3.add_stream(p_ack)
1328 self.pg_enable_capture(self.pg_interfaces)
1332 # We'll get an ARP request for the router address
1334 rx = self.pg3.get_capture(1)
1336 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1337 self.pg_enable_capture(self.pg_interfaces)
1340 # At the end of this procedure there should be a connected route
1343 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1344 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1347 # remove the DHCP config
1349 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0)
1351 self.assertFalse(find_route(self, self.pg3.local_ip4, 32))
1352 self.assertFalse(find_route(self, self.pg3.local_ip4, 24))
1355 # Rince and repeat, this time with VPP configured not to set
1356 # the braodcast flag in the discover and request messages,
1357 # and for the server to unicast the responses.
1359 # Configure DHCP client on PG3 and capture the discover sent
1361 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname,
1362 set_broadcast_flag=0)
1364 rx = self.pg3.get_capture(1)
1366 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname,
1370 # Send back on offer, unicasted to the offered address.
1371 # Expect the request.
1373 p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1374 IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) /
1375 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1376 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1377 chaddr=mactobinary(self.pg3.local_mac)) /
1378 DHCP(options=[('message-type', 'offer'),
1379 ('server_id', self.pg3.remote_ip4),
1382 self.pg3.add_stream(p_offer)
1383 self.pg_enable_capture(self.pg_interfaces)
1386 rx = self.pg3.get_capture(1)
1387 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1392 # Send an acknowledgment
1394 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1395 IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) /
1396 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1397 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1398 chaddr=mactobinary(self.pg3.local_mac)) /
1399 DHCP(options=[('message-type', 'ack'),
1400 ('subnet_mask', "255.255.255.0"),
1401 ('router', self.pg3.remote_ip4),
1402 ('server_id', self.pg3.remote_ip4),
1403 ('lease_time', 43200),
1406 self.pg3.add_stream(p_ack)
1407 self.pg_enable_capture(self.pg_interfaces)
1411 # We'll get an ARP request for the router address
1413 rx = self.pg3.get_capture(1)
1415 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1416 self.pg_enable_capture(self.pg_interfaces)
1419 # At the end of this procedure there should be a connected route
1422 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1423 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1425 # remove the left over ARP entry
1426 self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index,
1427 mactobinary(self.pg3.remote_mac),
1428 self.pg3.remote_ip4,
1432 # read the DHCP client details from a dump
1434 clients = self.vapi.dhcp_client_dump()
1436 self.assertEqual(clients[0].client.sw_if_index,
1437 self.pg3.sw_if_index)
1438 self.assertEqual(clients[0].lease.sw_if_index,
1439 self.pg3.sw_if_index)
1440 self.assertEqual(clients[0].client.hostname.rstrip('\0'),
1442 self.assertEqual(clients[0].lease.hostname.rstrip('\0'),
1444 self.assertEqual(clients[0].lease.is_ipv6, 0)
1445 # 0 = DISCOVER, 1 = REQUEST, 2 = BOUND
1446 self.assertEqual(clients[0].lease.state, 2)
1447 self.assertEqual(clients[0].lease.mask_width, 24)
1448 self.assertEqual(clients[0].lease.router_address.rstrip('\0'),
1449 self.pg3.remote_ip4n)
1450 self.assertEqual(clients[0].lease.host_address.rstrip('\0'),
1451 self.pg3.local_ip4n)
1454 # remove the DHCP config
1456 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0)
1459 # and now the route should be gone
1461 self.assertFalse(find_route(self, self.pg3.local_ip4, 32))
1462 self.assertFalse(find_route(self, self.pg3.local_ip4, 24))
1465 # Start the procedure again. Use requested lease time option.
1467 self.pg3.admin_down()
1470 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname)
1472 rx = self.pg3.get_capture(1)
1474 self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname)
1477 # Send back on offer with requested lease time, expect the request
1480 p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1481 IP(src=self.pg3.remote_ip4, dst='255.255.255.255') /
1482 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1484 yiaddr=self.pg3.local_ip4,
1485 chaddr=mactobinary(self.pg3.local_mac)) /
1486 DHCP(options=[('message-type', 'offer'),
1487 ('server_id', self.pg3.remote_ip4),
1488 ('lease_time', lease_time),
1491 self.pg3.add_stream(p_offer)
1492 self.pg_enable_capture(self.pg_interfaces)
1495 rx = self.pg3.get_capture(1)
1496 self.verify_orig_dhcp_request(rx[0], self.pg3, hostname,
1500 # Send an acknowledgment
1502 p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) /
1503 IP(src=self.pg3.remote_ip4, dst='255.255.255.255') /
1504 UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
1505 BOOTP(op=1, yiaddr=self.pg3.local_ip4,
1506 chaddr=mactobinary(self.pg3.local_mac)) /
1507 DHCP(options=[('message-type', 'ack'),
1508 ('subnet_mask', '255.255.255.0'),
1509 ('router', self.pg3.remote_ip4),
1510 ('server_id', self.pg3.remote_ip4),
1511 ('lease_time', lease_time),
1514 self.pg3.add_stream(p_ack)
1515 self.pg_enable_capture(self.pg_interfaces)
1519 # We'll get an ARP request for the router address
1521 rx = self.pg3.get_capture(1)
1523 self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4)
1526 # At the end of this procedure there should be a connected route
1529 self.assertTrue(find_route(self, self.pg3.local_ip4, 32))
1530 self.assertTrue(find_route(self, self.pg3.local_ip4, 24))
1532 # remove the left over ARP entry
1533 self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index,
1534 mactobinary(self.pg3.remote_mac),
1535 self.pg3.remote_ip4,
1539 # Sleep for the lease time
1541 self.sleep(lease_time+1)
1544 # And now the route should be gone
1546 self.assertFalse(find_route(self, self.pg3.local_ip4, 32))
1547 self.assertFalse(find_route(self, self.pg3.local_ip4, 24))
1550 # remove the DHCP config
1552 self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0)
1555 if __name__ == '__main__':
1556 unittest.main(testRunner=VppTestRunner)