diff options
Diffstat (limited to 'test/test_dhcp.py')
| -rw-r--r-- | test/test_dhcp.py | 1650 |
1 files changed, 0 insertions, 1650 deletions
diff --git a/test/test_dhcp.py b/test/test_dhcp.py deleted file mode 100644 index 39b0af77f9d..00000000000 --- a/test/test_dhcp.py +++ /dev/null @@ -1,1650 +0,0 @@ -#!/usr/bin/env python - -import unittest -import socket -import struct - -from framework import VppTestCase, VppTestRunner, running_extended_tests -from vpp_neighbor import VppNeighbor -from vpp_ip_route import find_route, VppIpTable -from util import mk_ll_addr -import scapy.compat -from scapy.layers.l2 import Ether, getmacbyip, ARP, Dot1Q -from scapy.layers.inet import IP, UDP, ICMP -from scapy.layers.inet6 import IPv6, in6_getnsmac -from scapy.utils6 import in6_mactoifaceid -from scapy.layers.dhcp import DHCP, BOOTP, DHCPTypes -from scapy.layers.dhcp6 import DHCP6, DHCP6_Solicit, DHCP6_RelayForward, \ - DHCP6_RelayReply, DHCP6_Advertise, DHCP6OptRelayMsg, DHCP6OptIfaceId, \ - DHCP6OptStatusCode, DHCP6OptVSS, DHCP6OptClientLinkLayerAddr, DHCP6_Request -from socket import AF_INET, AF_INET6 -from scapy.utils import inet_pton, inet_ntop -from scapy.utils6 import in6_ptop -from vpp_papi import mac_pton, VppEnum -from vpp_sub_interface import VppDot1QSubint -from vpp_qos import VppQosEgressMap, VppQosMark -from vpp_dhcp import VppDHCPClient, VppDHCPProxy - - -DHCP4_CLIENT_PORT = 68 -DHCP4_SERVER_PORT = 67 -DHCP6_CLIENT_PORT = 547 -DHCP6_SERVER_PORT = 546 - - -class TestDHCP(VppTestCase): - """ DHCP Test Case """ - - @classmethod - def setUpClass(cls): - super(TestDHCP, cls).setUpClass() - - @classmethod - def tearDownClass(cls): - super(TestDHCP, cls).tearDownClass() - - def setUp(self): - super(TestDHCP, self).setUp() - - # create 6 pg interfaces for pg0 to pg5 - self.create_pg_interfaces(range(6)) - self.tables = [] - - # pg0 to 2 are IP configured in VRF 0, 1 and 2. - # pg3 to 5 are non IP-configured in VRF 0, 1 and 2. - table_id = 0 - for table_id in range(1, 4): - tbl4 = VppIpTable(self, table_id) - tbl4.add_vpp_config() - self.tables.append(tbl4) - tbl6 = VppIpTable(self, table_id, is_ip6=1) - tbl6.add_vpp_config() - self.tables.append(tbl6) - - table_id = 0 - for i in self.pg_interfaces[:3]: - i.admin_up() - i.set_table_ip4(table_id) - i.set_table_ip6(table_id) - i.config_ip4() - i.resolve_arp() - i.config_ip6() - i.resolve_ndp() - table_id += 1 - - table_id = 0 - for i in self.pg_interfaces[3:]: - i.admin_up() - i.set_table_ip4(table_id) - i.set_table_ip6(table_id) - table_id += 1 - - def tearDown(self): - for i in self.pg_interfaces[:3]: - i.unconfig_ip4() - i.unconfig_ip6() - - for i in self.pg_interfaces: - i.set_table_ip4(0) - i.set_table_ip6(0) - i.admin_down() - super(TestDHCP, self).tearDown() - - def verify_dhcp_has_option(self, pkt, option, value): - dhcp = pkt[DHCP] - found = False - - for i in dhcp.options: - if isinstance(i, tuple): - if i[0] == option: - self.assertEqual(i[1], value) - found = True - - self.assertTrue(found) - - def validate_relay_options(self, pkt, intf, ip_addr, vpn_id, fib_id, oui): - dhcp = pkt[DHCP] - found = 0 - data = [] - id_len = len(vpn_id) - - for i in dhcp.options: - if isinstance(i, tuple): - if i[0] == "relay_agent_Information": - # - # There are two sb-options present - each of length 6. - # - data = i[1] - if oui != 0: - self.assertEqual(len(data), 24) - elif len(vpn_id) > 0: - self.assertEqual(len(data), len(vpn_id) + 17) - else: - self.assertEqual(len(data), 12) - - # - # First sub-option is ID 1, len 4, then encoded - # sw_if_index. This test uses low valued indicies - # so [2:4] are 0. - # The ID space is VPP internal - so no matching value - # scapy - # - self.assertEqual(ord(data[0]), 1) - self.assertEqual(ord(data[1]), 4) - self.assertEqual(ord(data[2]), 0) - self.assertEqual(ord(data[3]), 0) - self.assertEqual(ord(data[4]), 0) - self.assertEqual(ord(data[5]), intf._sw_if_index) - - # - # next sub-option is the IP address of the client side - # interface. - # sub-option ID=5, length (of a v4 address)=4 - # - claddr = socket.inet_pton(AF_INET, ip_addr) - - self.assertEqual(ord(data[6]), 5) - self.assertEqual(ord(data[7]), 4) - self.assertEqual(data[8], claddr[0]) - self.assertEqual(data[9], claddr[1]) - self.assertEqual(data[10], claddr[2]) - self.assertEqual(data[11], claddr[3]) - - if oui != 0: - # sub-option 151 encodes vss_type 1, - # the 3 byte oui and the 4 byte fib_id - self.assertEqual(id_len, 0) - self.assertEqual(ord(data[12]), 151) - self.assertEqual(ord(data[13]), 8) - self.assertEqual(ord(data[14]), 1) - self.assertEqual(ord(data[15]), 0) - self.assertEqual(ord(data[16]), 0) - self.assertEqual(ord(data[17]), oui) - self.assertEqual(ord(data[18]), 0) - self.assertEqual(ord(data[19]), 0) - self.assertEqual(ord(data[20]), 0) - self.assertEqual(ord(data[21]), fib_id) - - # VSS control sub-option - self.assertEqual(ord(data[22]), 152) - self.assertEqual(ord(data[23]), 0) - - if id_len > 0: - # sub-option 151 encode vss_type of 0 - # followerd by vpn_id in ascii - self.assertEqual(oui, 0) - self.assertEqual(ord(data[12]), 151) - self.assertEqual(ord(data[13]), id_len + 1) - self.assertEqual(ord(data[14]), 0) - self.assertEqual(data[15:15 + id_len], vpn_id) - - # VSS control sub-option - self.assertEqual(ord(data[15 + len(vpn_id)]), 152) - self.assertEqual(ord(data[16 + len(vpn_id)]), 0) - - found = 1 - self.assertTrue(found) - - return data - - def verify_dhcp_msg_type(self, pkt, name): - dhcp = pkt[DHCP] - found = False - for o in dhcp.options: - if isinstance(o, tuple): - if o[0] == "message-type" \ - and DHCPTypes[o[1]] == name: - found = True - self.assertTrue(found) - - def verify_dhcp_offer(self, pkt, intf, vpn_id="", fib_id=0, oui=0): - ether = pkt[Ether] - self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff") - self.assertEqual(ether.src, intf.local_mac) - - ip = pkt[IP] - self.assertEqual(ip.dst, "255.255.255.255") - self.assertEqual(ip.src, intf.local_ip4) - - udp = pkt[UDP] - self.assertEqual(udp.dport, DHCP4_CLIENT_PORT) - self.assertEqual(udp.sport, DHCP4_SERVER_PORT) - - self.verify_dhcp_msg_type(pkt, "offer") - data = self.validate_relay_options(pkt, intf, intf.local_ip4, - vpn_id, fib_id, oui) - - def verify_orig_dhcp_pkt(self, pkt, intf, dscp, l2_bc=True): - ether = pkt[Ether] - if l2_bc: - self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff") - else: - self.assertEqual(ether.dst, intf.remote_mac) - self.assertEqual(ether.src, intf.local_mac) - - ip = pkt[IP] - - if (l2_bc): - self.assertEqual(ip.dst, "255.255.255.255") - self.assertEqual(ip.src, "0.0.0.0") - else: - self.assertEqual(ip.dst, intf.remote_ip4) - self.assertEqual(ip.src, intf.local_ip4) - self.assertEqual(ip.tos, dscp) - - udp = pkt[UDP] - self.assertEqual(udp.dport, DHCP4_SERVER_PORT) - self.assertEqual(udp.sport, DHCP4_CLIENT_PORT) - - def verify_orig_dhcp_discover(self, pkt, intf, hostname, client_id=None, - broadcast=True, dscp=0): - self.verify_orig_dhcp_pkt(pkt, intf, dscp) - - self.verify_dhcp_msg_type(pkt, "discover") - self.verify_dhcp_has_option(pkt, "hostname", hostname) - if client_id: - self.verify_dhcp_has_option(pkt, "client_id", client_id) - bootp = pkt[BOOTP] - self.assertEqual(bootp.ciaddr, "0.0.0.0") - self.assertEqual(bootp.giaddr, "0.0.0.0") - if broadcast: - self.assertEqual(bootp.flags, 0x8000) - else: - self.assertEqual(bootp.flags, 0x0000) - - def verify_orig_dhcp_request(self, pkt, intf, hostname, ip, - broadcast=True, - l2_bc=True, - dscp=0): - self.verify_orig_dhcp_pkt(pkt, intf, dscp, l2_bc=l2_bc) - - self.verify_dhcp_msg_type(pkt, "request") - self.verify_dhcp_has_option(pkt, "hostname", hostname) - self.verify_dhcp_has_option(pkt, "requested_addr", ip) - bootp = pkt[BOOTP] - - if l2_bc: - self.assertEqual(bootp.ciaddr, "0.0.0.0") - else: - self.assertEqual(bootp.ciaddr, intf.local_ip4) - self.assertEqual(bootp.giaddr, "0.0.0.0") - - if broadcast: - self.assertEqual(bootp.flags, 0x8000) - else: - self.assertEqual(bootp.flags, 0x0000) - - def verify_relayed_dhcp_discover(self, pkt, intf, src_intf=None, - fib_id=0, oui=0, - vpn_id="", - dst_mac=None, dst_ip=None): - if not dst_mac: - dst_mac = intf.remote_mac - if not dst_ip: - dst_ip = intf.remote_ip4 - - ether = pkt[Ether] - self.assertEqual(ether.dst, dst_mac) - self.assertEqual(ether.src, intf.local_mac) - - ip = pkt[IP] - self.assertEqual(ip.dst, dst_ip) - self.assertEqual(ip.src, intf.local_ip4) - - udp = pkt[UDP] - self.assertEqual(udp.dport, DHCP4_SERVER_PORT) - self.assertEqual(udp.sport, DHCP4_CLIENT_PORT) - - dhcp = pkt[DHCP] - - is_discover = False - for o in dhcp.options: - if isinstance(o, tuple): - if o[0] == "message-type" \ - and DHCPTypes[o[1]] == "discover": - is_discover = True - self.assertTrue(is_discover) - - data = self.validate_relay_options(pkt, src_intf, - src_intf.local_ip4, - vpn_id, - fib_id, oui) - return data - - def verify_dhcp6_solicit(self, pkt, intf, - peer_ip, peer_mac, - vpn_id="", - fib_id=0, - oui=0, - dst_mac=None, - dst_ip=None): - if not dst_mac: - dst_mac = intf.remote_mac - if not dst_ip: - dst_ip = in6_ptop(intf.remote_ip6) - - ether = pkt[Ether] - self.assertEqual(ether.dst, dst_mac) - self.assertEqual(ether.src, intf.local_mac) - - ip = pkt[IPv6] - self.assertEqual(in6_ptop(ip.dst), dst_ip) - self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6)) - - udp = pkt[UDP] - self.assertEqual(udp.dport, DHCP6_CLIENT_PORT) - self.assertEqual(udp.sport, DHCP6_SERVER_PORT) - - relay = pkt[DHCP6_RelayForward] - self.assertEqual(in6_ptop(relay.peeraddr), in6_ptop(peer_ip)) - oid = pkt[DHCP6OptIfaceId] - cll = pkt[DHCP6OptClientLinkLayerAddr] - self.assertEqual(cll.optlen, 8) - self.assertEqual(cll.lltype, 1) - self.assertEqual(cll.clladdr, peer_mac) - - id_len = len(vpn_id) - - if fib_id != 0: - self.assertEqual(id_len, 0) - vss = pkt[DHCP6OptVSS] - self.assertEqual(vss.optlen, 8) - self.assertEqual(vss.type, 1) - # the OUI and FIB-id are really 3 and 4 bytes resp. - # but the tested range is small - self.assertEqual(ord(vss.data[0]), 0) - self.assertEqual(ord(vss.data[1]), 0) - self.assertEqual(ord(vss.data[2]), oui) - self.assertEqual(ord(vss.data[3]), 0) - self.assertEqual(ord(vss.data[4]), 0) - self.assertEqual(ord(vss.data[5]), 0) - self.assertEqual(ord(vss.data[6]), fib_id) - - if id_len > 0: - self.assertEqual(oui, 0) - vss = pkt[DHCP6OptVSS] - self.assertEqual(vss.optlen, id_len + 1) - self.assertEqual(vss.type, 0) - self.assertEqual(vss.data[0:id_len], vpn_id) - - # the relay message should be an encoded Solicit - msg = pkt[DHCP6OptRelayMsg] - sol = DHCP6_Solicit() - self.assertEqual(msg.optlen, len(str(sol))) - self.assertEqual(str(sol), (str(msg[1]))[:msg.optlen]) - - def verify_dhcp6_advert(self, pkt, intf, peer): - ether = pkt[Ether] - self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff") - self.assertEqual(ether.src, intf.local_mac) - - ip = pkt[IPv6] - self.assertEqual(in6_ptop(ip.dst), in6_ptop(peer)) - self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6)) - - udp = pkt[UDP] - self.assertEqual(udp.dport, DHCP6_SERVER_PORT) - self.assertEqual(udp.sport, DHCP6_CLIENT_PORT) - - # not sure why this is not decoding - # adv = pkt[DHCP6_Advertise] - - def wait_for_no_route(self, address, length, - n_tries=50, s_time=1): - while (n_tries): - if not find_route(self, address, length): - return True - n_tries = n_tries - 1 - self.sleep(s_time) - - return False - - def test_dhcp_proxy(self): - """ DHCPv4 Proxy """ - - # - # Verify no response to DHCP request without DHCP config - # - p_disc_vrf0 = (Ether(dst="ff:ff:ff:ff:ff:ff", - src=self.pg3.remote_mac) / - IP(src="0.0.0.0", dst="255.255.255.255") / - UDP(sport=DHCP4_CLIENT_PORT, - dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'discover'), ('end')])) - pkts_disc_vrf0 = [p_disc_vrf0] - p_disc_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff", - src=self.pg4.remote_mac) / - IP(src="0.0.0.0", dst="255.255.255.255") / - UDP(sport=DHCP4_CLIENT_PORT, - dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'discover'), ('end')])) - pkts_disc_vrf1 = [p_disc_vrf1] - p_disc_vrf2 = (Ether(dst="ff:ff:ff:ff:ff:ff", - src=self.pg5.remote_mac) / - IP(src="0.0.0.0", dst="255.255.255.255") / - UDP(sport=DHCP4_CLIENT_PORT, - dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'discover'), ('end')])) - pkts_disc_vrf2 = [p_disc_vrf2] - - self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0, - "DHCP with no configuration") - self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1, - "DHCP with no configuration") - self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2, - "DHCP with no configuration") - - # - # Enable DHCP proxy in VRF 0 - # - server_addr = self.pg0.remote_ip4 - src_addr = self.pg0.local_ip4 - - Proxy = VppDHCPProxy(self, server_addr, src_addr, rx_vrf_id=0) - Proxy.add_vpp_config() - - # - # Discover packets from the client are dropped because there is no - # IP address configured on the client facing interface - # - self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0, - "Discover DHCP no relay address") - - # - # Inject a response from the server - # dropped, because there is no IP addrees on the - # client interfce to fill in the option. - # - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'offer'), ('end')])) - pkts = [p] - - self.send_and_assert_no_replies(self.pg3, pkts, - "Offer DHCP no relay address") - - # - # configure an IP address on the client facing interface - # - self.pg3.config_ip4() - - # - # Try again with a discover packet - # Rx'd packet should be to the server address and from the configured - # source address - # UDP source ports are unchanged - # we've no option 82 config so that should be absent - # - self.pg3.add_stream(pkts_disc_vrf0) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg0.get_capture(1) - rx = rx[0] - - option_82 = self.verify_relayed_dhcp_discover(rx, self.pg0, - src_intf=self.pg3) - - # - # Create an DHCP offer reply from the server with a correctly formatted - # option 82. i.e. send back what we just captured - # The offer, sent mcast to the client, still has option 82. - # - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'offer'), - ('relay_agent_Information', option_82), - ('end')])) - pkts = [p] - - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg3.get_capture(1) - rx = rx[0] - - self.verify_dhcp_offer(rx, self.pg3) - - # - # Bogus Option 82: - # - # 1. not our IP address = not checked by VPP? so offer is replayed - # to client - bad_ip = option_82[0:8] + scapy.compat.chb(33) + option_82[9:] - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'offer'), - ('relay_agent_Information', bad_ip), - ('end')])) - pkts = [p] - self.send_and_assert_no_replies(self.pg0, pkts, - "DHCP offer option 82 bad address") - - # 2. Not a sw_if_index VPP knows - bad_if_index = option_82[0:2] + scapy.compat.chb(33) + option_82[3:] - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'offer'), - ('relay_agent_Information', bad_if_index), - ('end')])) - pkts = [p] - self.send_and_assert_no_replies(self.pg0, pkts, - "DHCP offer option 82 bad if index") - - # - # Send a DHCP request in VRF 1. should be dropped. - # - self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1, - "DHCP with no configuration VRF 1") - - # - # Delete the DHCP config in VRF 0 - # Should now drop requests. - # - Proxy.remove_vpp_config() - - self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0, - "DHCP config removed VRF 0") - self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1, - "DHCP config removed VRF 1") - - # - # Add DHCP config for VRF 1 & 2 - # - server_addr1 = self.pg1.remote_ip4 - src_addr1 = self.pg1.local_ip4 - Proxy1 = VppDHCPProxy( - self, - server_addr1, - src_addr1, - rx_vrf_id=1, - server_vrf_id=1) - Proxy1.add_vpp_config() - - server_addr2 = self.pg2.remote_ip4 - src_addr2 = self.pg2.local_ip4 - Proxy2 = VppDHCPProxy( - self, - server_addr2, - src_addr2, - rx_vrf_id=2, - server_vrf_id=2) - Proxy2.add_vpp_config() - - # - # Confim DHCP requests ok in VRF 1 & 2. - # - dropped on IP config on client interface - # - self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1, - "DHCP config removed VRF 1") - self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2, - "DHCP config removed VRF 2") - - # - # configure an IP address on the client facing interface - # - self.pg4.config_ip4() - self.pg4.add_stream(pkts_disc_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - rx = self.pg1.get_capture(1) - rx = rx[0] - self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4) - - self.pg5.config_ip4() - self.pg5.add_stream(pkts_disc_vrf2) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - rx = self.pg2.get_capture(1) - rx = rx[0] - self.verify_relayed_dhcp_discover(rx, self.pg2, src_intf=self.pg5) - - # - # Add VSS config - # table=1, vss_type=1, vpn_index=1, oui=4 - # table=2, vss_type=0, vpn_id = "ip4-table-2" - self.vapi.dhcp_proxy_set_vss(1, 1, vpn_index=1, oui=4, is_add=1) - self.vapi.dhcp_proxy_set_vss(2, 0, "ip4-table-2", is_add=1) - - self.pg4.add_stream(pkts_disc_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - rx = rx[0] - self.verify_relayed_dhcp_discover(rx, self.pg1, - src_intf=self.pg4, - fib_id=1, oui=4) - - self.pg5.add_stream(pkts_disc_vrf2) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg2.get_capture(1) - rx = rx[0] - self.verify_relayed_dhcp_discover(rx, self.pg2, - src_intf=self.pg5, - vpn_id="ip4-table-2") - - # - # Add a second DHCP server in VRF 1 - # expect clients messages to be relay to both configured servers - # - self.pg1.generate_remote_hosts(2) - server_addr12 = self.pg1.remote_hosts[1].ip4 - - Proxy12 = VppDHCPProxy( - self, - server_addr12, - src_addr, - rx_vrf_id=1, - server_vrf_id=1) - Proxy12.add_vpp_config() - - # - # We'll need an ARP entry for the server to send it packets - # - arp_entry = VppNeighbor(self, - self.pg1.sw_if_index, - self.pg1.remote_hosts[1].mac, - self.pg1.remote_hosts[1].ip4) - arp_entry.add_vpp_config() - - # - # Send a discover from the client. expect two relayed messages - # The frist packet is sent to the second server - # We're not enforcing that here, it's just the way it is. - # - self.pg4.add_stream(pkts_disc_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(2) - - option_82 = self.verify_relayed_dhcp_discover( - rx[0], self.pg1, - src_intf=self.pg4, - dst_mac=self.pg1.remote_hosts[1].mac, - dst_ip=self.pg1.remote_hosts[1].ip4, - fib_id=1, oui=4) - self.verify_relayed_dhcp_discover(rx[1], self.pg1, - src_intf=self.pg4, - fib_id=1, oui=4) - - # - # Send both packets back. Client gets both. - # - p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'offer'), - ('relay_agent_Information', option_82), - ('end')])) - p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_hosts[1].ip4, dst=self.pg1.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'offer'), - ('relay_agent_Information', option_82), - ('end')])) - pkts = [p1, p2] - - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg4.get_capture(2) - - self.verify_dhcp_offer(rx[0], self.pg4, fib_id=1, oui=4) - self.verify_dhcp_offer(rx[1], self.pg4, fib_id=1, oui=4) - - # - # Ensure offers from non-servers are dropeed - # - p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src="8.8.8.8", dst=self.pg1.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'offer'), - ('relay_agent_Information', option_82), - ('end')])) - self.send_and_assert_no_replies(self.pg1, p2, - "DHCP offer from non-server") - - # - # Ensure only the discover is sent to multiple servers - # - p_req_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff", - src=self.pg4.remote_mac) / - IP(src="0.0.0.0", dst="255.255.255.255") / - UDP(sport=DHCP4_CLIENT_PORT, - dport=DHCP4_SERVER_PORT) / - BOOTP(op=1) / - DHCP(options=[('message-type', 'request'), - ('end')])) - - self.pg4.add_stream(p_req_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - - # - # Remove the second DHCP server - # - Proxy12.remove_vpp_config() - - # - # Test we can still relay with the first - # - self.pg4.add_stream(pkts_disc_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - rx = rx[0] - self.verify_relayed_dhcp_discover(rx, self.pg1, - src_intf=self.pg4, - fib_id=1, oui=4) - - # - # Remove the VSS config - # relayed DHCP has default vlaues in the option. - # - self.vapi.dhcp_proxy_set_vss(1, is_add=0) - self.vapi.dhcp_proxy_set_vss(2, is_add=0) - - self.pg4.add_stream(pkts_disc_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - rx = rx[0] - self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg4) - - # - # remove DHCP config to cleanup - # - Proxy1.remove_vpp_config() - Proxy2.remove_vpp_config() - - self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf0, - "DHCP cleanup VRF 0") - self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1, - "DHCP cleanup VRF 1") - self.send_and_assert_no_replies(self.pg5, pkts_disc_vrf2, - "DHCP cleanup VRF 2") - - self.pg3.unconfig_ip4() - self.pg4.unconfig_ip4() - self.pg5.unconfig_ip4() - - def test_dhcp6_proxy(self): - """ DHCPv6 Proxy""" - # - # Verify no response to DHCP request without DHCP config - # - dhcp_solicit_dst = "ff02::1:2" - dhcp_solicit_src_vrf0 = mk_ll_addr(self.pg3.remote_mac) - dhcp_solicit_src_vrf1 = mk_ll_addr(self.pg4.remote_mac) - dhcp_solicit_src_vrf2 = mk_ll_addr(self.pg5.remote_mac) - server_addr_vrf0 = self.pg0.remote_ip6 - src_addr_vrf0 = self.pg0.local_ip6 - server_addr_vrf1 = self.pg1.remote_ip6 - src_addr_vrf1 = self.pg1.local_ip6 - server_addr_vrf2 = self.pg2.remote_ip6 - src_addr_vrf2 = self.pg2.local_ip6 - - dmac = in6_getnsmac(inet_pton(socket.AF_INET6, dhcp_solicit_dst)) - p_solicit_vrf0 = (Ether(dst=dmac, src=self.pg3.remote_mac) / - IPv6(src=dhcp_solicit_src_vrf0, - dst=dhcp_solicit_dst) / - UDP(sport=DHCP6_SERVER_PORT, - dport=DHCP6_CLIENT_PORT) / - DHCP6_Solicit()) - p_solicit_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) / - IPv6(src=dhcp_solicit_src_vrf1, - dst=dhcp_solicit_dst) / - UDP(sport=DHCP6_SERVER_PORT, - dport=DHCP6_CLIENT_PORT) / - DHCP6_Solicit()) - p_solicit_vrf2 = (Ether(dst=dmac, src=self.pg5.remote_mac) / - IPv6(src=dhcp_solicit_src_vrf2, - dst=dhcp_solicit_dst) / - UDP(sport=DHCP6_SERVER_PORT, - dport=DHCP6_CLIENT_PORT) / - DHCP6_Solicit()) - - self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0, - "DHCP with no configuration") - self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1, - "DHCP with no configuration") - self.send_and_assert_no_replies(self.pg5, p_solicit_vrf2, - "DHCP with no configuration") - - # - # DHCPv6 config in VRF 0. - # Packets still dropped because the client facing interface has no - # IPv6 config - # - Proxy = VppDHCPProxy( - self, - server_addr_vrf0, - src_addr_vrf0, - rx_vrf_id=0, - server_vrf_id=0) - Proxy.add_vpp_config() - - self.send_and_assert_no_replies(self.pg3, p_solicit_vrf0, - "DHCP with no configuration") - self.send_and_assert_no_replies(self.pg4, p_solicit_vrf1, - "DHCP with no configuration") - - # - # configure an IP address on the client facing interface - # - self.pg3.config_ip6() - - # - # Now the DHCP requests are relayed to the server - # - self.pg3.add_stream(p_solicit_vrf0) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg0.get_capture(1) - - self.verify_dhcp6_solicit(rx[0], self.pg0, - dhcp_solicit_src_vrf0, - self.pg3.remote_mac) - - # - # Exception cases for rejected relay responses - # - - # 1 - not a relay reply - p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_Advertise()) - self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, - "DHCP6 not a relay reply") - - # 2 - no relay message option - p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply() / - DHCP6_Advertise()) - self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, - "DHCP not a relay message") - - # 3 - no circuit ID - p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply() / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise()) - self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, - "DHCP6 no circuit ID") - # 4 - wrong circuit ID - p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply() / - DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise()) - self.send_and_assert_no_replies(self.pg3, p_adv_vrf0, - "DHCP6 wrong circuit ID") - - # - # Send the relay response (the advertisement) - # - no peer address - p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply() / - DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise(trid=1) / - DHCP6OptStatusCode(statuscode=0)) - pkts_adv_vrf0 = [p_adv_vrf0] - - self.pg0.add_stream(pkts_adv_vrf0) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg3.get_capture(1) - - self.verify_dhcp6_advert(rx[0], self.pg3, "::") - - # - # Send the relay response (the advertisement) - # - with peer address - p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf0) / - DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise(trid=1) / - DHCP6OptStatusCode(statuscode=0)) - pkts_adv_vrf0 = [p_adv_vrf0] - - self.pg0.add_stream(pkts_adv_vrf0) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg3.get_capture(1) - - self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf0) - - # - # Add all the config for VRF 1 & 2 - # - Proxy1 = VppDHCPProxy( - self, - server_addr_vrf1, - src_addr_vrf1, - rx_vrf_id=1, - server_vrf_id=1) - Proxy1.add_vpp_config() - self.pg4.config_ip6() - - Proxy2 = VppDHCPProxy( - self, - server_addr_vrf2, - src_addr_vrf2, - rx_vrf_id=2, - server_vrf_id=2) - Proxy2.add_vpp_config() - self.pg5.config_ip6() - - # - # VRF 1 solicit - # - self.pg4.add_stream(p_solicit_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - - self.verify_dhcp6_solicit(rx[0], self.pg1, - dhcp_solicit_src_vrf1, - self.pg4.remote_mac) - - # - # VRF 2 solicit - # - self.pg5.add_stream(p_solicit_vrf2) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg2.get_capture(1) - - self.verify_dhcp6_solicit(rx[0], self.pg2, - dhcp_solicit_src_vrf2, - self.pg5.remote_mac) - - # - # VRF 1 Advert - # - p_adv_vrf1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / - DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise(trid=1) / - DHCP6OptStatusCode(statuscode=0)) - pkts_adv_vrf1 = [p_adv_vrf1] - - self.pg1.add_stream(pkts_adv_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg4.get_capture(1) - - self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1) - - # - # Add VSS config - # - self.vapi.dhcp_proxy_set_vss( - tbl_id=1, vss_type=1, oui=4, vpn_index=1, is_ipv6=1) - self.vapi.dhcp_proxy_set_vss( - tbl_id=2, - vss_type=0, - vpn_ascii_id="IPv6-table-2", - is_ipv6=1) - - self.pg4.add_stream(p_solicit_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - - self.verify_dhcp6_solicit(rx[0], self.pg1, - dhcp_solicit_src_vrf1, - self.pg4.remote_mac, - fib_id=1, - oui=4) - - self.pg5.add_stream(p_solicit_vrf2) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg2.get_capture(1) - - self.verify_dhcp6_solicit(rx[0], self.pg2, - dhcp_solicit_src_vrf2, - self.pg5.remote_mac, - vpn_id="IPv6-table-2") - - # - # Remove the VSS config - # relayed DHCP has default vlaues in the option. - # - self.vapi.dhcp_proxy_set_vss(1, is_ipv6=1, is_add=0) - - self.pg4.add_stream(p_solicit_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - - self.verify_dhcp6_solicit(rx[0], self.pg1, - dhcp_solicit_src_vrf1, - self.pg4.remote_mac) - - # - # Add a second DHCP server in VRF 1 - # expect clients messages to be relay to both configured servers - # - self.pg1.generate_remote_hosts(2) - server_addr12 = self.pg1.remote_hosts[1].ip6 - - Proxy12 = VppDHCPProxy( - self, - server_addr12, - src_addr_vrf1, - rx_vrf_id=1, - server_vrf_id=1) - Proxy12.add_vpp_config() - - # - # We'll need an ND entry for the server to send it packets - # - nd_entry = VppNeighbor(self, - self.pg1.sw_if_index, - self.pg1.remote_hosts[1].mac, - self.pg1.remote_hosts[1].ip6) - nd_entry.add_vpp_config() - - # - # Send a discover from the client. expect two relayed messages - # The frist packet is sent to the second server - # We're not enforcing that here, it's just the way it is. - # - self.pg4.add_stream(p_solicit_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(2) - - self.verify_dhcp6_solicit(rx[0], self.pg1, - dhcp_solicit_src_vrf1, - self.pg4.remote_mac) - self.verify_dhcp6_solicit(rx[1], self.pg1, - dhcp_solicit_src_vrf1, - self.pg4.remote_mac, - dst_mac=self.pg1.remote_hosts[1].mac, - dst_ip=self.pg1.remote_hosts[1].ip6) - - # - # Send both packets back. Client gets both. - # - p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / - DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise(trid=1) / - DHCP6OptStatusCode(statuscode=0)) - p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) / - IPv6(dst=self.pg1.local_ip6, src=self.pg1._remote_hosts[1].ip6) / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / - DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise(trid=1) / - DHCP6OptStatusCode(statuscode=0)) - - pkts = [p1, p2] - - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg4.get_capture(2) - - self.verify_dhcp6_advert(rx[0], self.pg4, dhcp_solicit_src_vrf1) - self.verify_dhcp6_advert(rx[1], self.pg4, dhcp_solicit_src_vrf1) - - # - # Ensure only solicit messages are duplicated - # - p_request_vrf1 = (Ether(dst=dmac, src=self.pg4.remote_mac) / - IPv6(src=dhcp_solicit_src_vrf1, - dst=dhcp_solicit_dst) / - UDP(sport=DHCP6_SERVER_PORT, - dport=DHCP6_CLIENT_PORT) / - DHCP6_Request()) - - self.pg4.add_stream(p_request_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - - # - # Test we drop DHCP packets from addresses that are not configured as - # DHCP servers - # - p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) / - IPv6(dst=self.pg1.local_ip6, src="3001::1") / - UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) / - DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) / - DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') / - DHCP6OptRelayMsg(optlen=0) / - DHCP6_Advertise(trid=1) / - DHCP6OptStatusCode(statuscode=0)) - self.send_and_assert_no_replies(self.pg1, p2, - "DHCP6 not from server") - - # - # Remove the second DHCP server - # - Proxy12.remove_vpp_config() - - # - # Test we can still relay with the first - # - self.pg4.add_stream(p_solicit_vrf1) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg1.get_capture(1) - - self.verify_dhcp6_solicit(rx[0], self.pg1, - dhcp_solicit_src_vrf1, - self.pg4.remote_mac) - - # - # Cleanup - # - Proxy.remove_vpp_config() - Proxy1.remove_vpp_config() - Proxy2.remove_vpp_config() - - self.pg3.unconfig_ip6() - self.pg4.unconfig_ip6() - self.pg5.unconfig_ip6() - - def test_dhcp_client(self): - """ DHCP Client""" - - vdscp = VppEnum.vl_api_ip_dscp_t - hostname = 'universal-dp' - - self.pg_enable_capture(self.pg_interfaces) - - # - # Configure DHCP client on PG3 and capture the discover sent - # - Client = VppDHCPClient(self, self.pg3.sw_if_index, hostname) - Client.add_vpp_config() - self.assertTrue(Client.query_vpp_config()) - - rx = self.pg3.get_capture(1) - - self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname) - - # - # Send back on offer, expect the request - # - p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst="255.255.255.255") / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / - BOOTP(op=1, - yiaddr=self.pg3.local_ip4, - chaddr=mac_pton(self.pg3.local_mac)) / - DHCP(options=[('message-type', 'offer'), - ('server_id', self.pg3.remote_ip4), - 'end'])) - - self.pg3.add_stream(p_offer) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg3.get_capture(1) - self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, - self.pg3.local_ip4) - - # - # Send an acknowledgment - # - p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst="255.255.255.255") / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / - BOOTP(op=1, yiaddr=self.pg3.local_ip4, - chaddr=mac_pton(self.pg3.local_mac)) / - DHCP(options=[('message-type', 'ack'), - ('subnet_mask', "255.255.255.0"), - ('router', self.pg3.remote_ip4), - ('server_id', self.pg3.remote_ip4), - ('lease_time', 43200), - 'end'])) - - self.pg3.add_stream(p_ack) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # - # We'll get an ARP request for the router address - # - rx = self.pg3.get_capture(1) - - self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) - self.pg_enable_capture(self.pg_interfaces) - - # - # At the end of this procedure there should be a connected route - # in the FIB - # - self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) - self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) - - # remove the left over ARP entry - self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index, - self.pg3.remote_mac, - self.pg3.remote_ip4, - is_add=0) - - # - # remove the DHCP config - # - Client.remove_vpp_config() - - # - # and now the route should be gone - # - self.assertFalse(find_route(self, self.pg3.local_ip4, 32)) - self.assertFalse(find_route(self, self.pg3.local_ip4, 24)) - - # - # Start the procedure again. this time have VPP send the client-ID - # and set the DSCP value - # - self.pg3.admin_down() - self.sleep(1) - self.pg3.admin_up() - Client.set_client(self.pg3.sw_if_index, hostname, - id=self.pg3.local_mac, - dscp=vdscp.IP_API_DSCP_EF) - Client.add_vpp_config() - - rx = self.pg3.get_capture(1) - - self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname, - self.pg3.local_mac, - dscp=vdscp.IP_API_DSCP_EF) - - # TODO: VPP DHCP client should not accept DHCP OFFER message with - # the XID (Transaction ID) not matching the XID of the most recent - # DHCP DISCOVERY message. - # Such DHCP OFFER message must be silently discarded - RFC2131. - # Reported in Jira ticket: VPP-99 - self.pg3.add_stream(p_offer) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg3.get_capture(1) - self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, - self.pg3.local_ip4, - dscp=vdscp.IP_API_DSCP_EF) - - # - # unicast the ack to the offered address - # - p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / - BOOTP(op=1, yiaddr=self.pg3.local_ip4, - chaddr=mac_pton(self.pg3.local_mac)) / - DHCP(options=[('message-type', 'ack'), - ('subnet_mask', "255.255.255.0"), - ('router', self.pg3.remote_ip4), - ('server_id', self.pg3.remote_ip4), - ('lease_time', 43200), - 'end'])) - - self.pg3.add_stream(p_ack) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # - # We'll get an ARP request for the router address - # - rx = self.pg3.get_capture(1) - - self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) - self.pg_enable_capture(self.pg_interfaces) - - # - # At the end of this procedure there should be a connected route - # in the FIB - # - self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) - self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) - - # - # remove the DHCP config - # - Client.remove_vpp_config() - - self.assertFalse(find_route(self, self.pg3.local_ip4, 32)) - self.assertFalse(find_route(self, self.pg3.local_ip4, 24)) - - # - # Rince and repeat, this time with VPP configured not to set - # the braodcast flag in the discover and request messages, - # and for the server to unicast the responses. - # - # Configure DHCP client on PG3 and capture the discover sent - # - Client.set_client( - self.pg3.sw_if_index, - hostname, - set_broadcast_flag=False) - Client.add_vpp_config() - - rx = self.pg3.get_capture(1) - - self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname, - broadcast=False) - - # - # Send back on offer, unicasted to the offered address. - # Expect the request. - # - p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / - BOOTP(op=1, yiaddr=self.pg3.local_ip4, - chaddr=mac_pton(self.pg3.local_mac)) / - DHCP(options=[('message-type', 'offer'), - ('server_id', self.pg3.remote_ip4), - 'end'])) - - self.pg3.add_stream(p_offer) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg3.get_capture(1) - self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, - self.pg3.local_ip4, - broadcast=False) - - # - # Send an acknowledgment, the lease renewal time is 2 seconds - # so we should expect the renew straight after - # - p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / - BOOTP(op=1, yiaddr=self.pg3.local_ip4, - chaddr=mac_pton(self.pg3.local_mac)) / - DHCP(options=[('message-type', 'ack'), - ('subnet_mask', "255.255.255.0"), - ('router', self.pg3.remote_ip4), - ('server_id', self.pg3.remote_ip4), - ('lease_time', 43200), - ('renewal_time', 2), - 'end'])) - - self.pg3.add_stream(p_ack) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # - # We'll get an ARP request for the router address - # - rx = self.pg3.get_capture(1) - - self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) - self.pg_enable_capture(self.pg_interfaces) - - # - # At the end of this procedure there should be a connected route - # in the FIB - # - self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) - self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) - - # - # wait for the unicasted renewal - # the first attempt will be an ARP packet, since we have not yet - # responded to VPP's request - # - self.logger.info(self.vapi.cli("sh dhcp client intfc pg3 verbose")) - rx = self.pg3.get_capture(1, timeout=10) - - self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) - - # respond to the arp - p_arp = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - ARP(op="is-at", - hwdst=self.pg3.local_mac, - hwsrc=self.pg3.remote_mac, - pdst=self.pg3.local_ip4, - psrc=self.pg3.remote_ip4)) - self.pg3.add_stream(p_arp) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # the next packet is the unicasted renewal - rx = self.pg3.get_capture(1, timeout=10) - self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, - self.pg3.local_ip4, - l2_bc=False, - broadcast=False) - - # - # read the DHCP client details from a dump - # - clients = self.vapi.dhcp_client_dump() - - self.assertEqual(clients[0].client.sw_if_index, - self.pg3.sw_if_index) - self.assertEqual(clients[0].lease.sw_if_index, - self.pg3.sw_if_index) - self.assertEqual(clients[0].client.hostname.rstrip('\0'), - hostname) - self.assertEqual(clients[0].lease.hostname.rstrip('\0'), - hostname) - # 0 = DISCOVER, 1 = REQUEST, 2 = BOUND - self.assertEqual(clients[0].lease.state, 2) - self.assertEqual(clients[0].lease.mask_width, 24) - self.assertEqual(str(clients[0].lease.router_address), - self.pg3.remote_ip4) - self.assertEqual(str(clients[0].lease.host_address), - self.pg3.local_ip4) - - # remove the left over ARP entry - self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index, - self.pg3.remote_mac, - self.pg3.remote_ip4, - is_add=0) - - # - # remove the DHCP config - # - Client.remove_vpp_config() - - # - # and now the route should be gone - # - self.assertFalse(find_route(self, self.pg3.local_ip4, 32)) - self.assertFalse(find_route(self, self.pg3.local_ip4, 24)) - - # - # Start the procedure again. Use requested lease time option. - # - hostname += "-2" - self.pg3.admin_down() - self.sleep(1) - self.pg3.admin_up() - self.pg_enable_capture(self.pg_interfaces) - Client.set_client(self.pg3.sw_if_index, hostname) - Client.add_vpp_config() - - rx = self.pg3.get_capture(1) - - self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname) - - # - # Send back on offer with requested lease time, expect the request - # - lease_time = 1 - p_offer = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst='255.255.255.255') / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / - BOOTP(op=1, - yiaddr=self.pg3.local_ip4, - chaddr=mac_pton(self.pg3.local_mac)) / - DHCP(options=[('message-type', 'offer'), - ('server_id', self.pg3.remote_ip4), - ('lease_time', lease_time), - 'end'])) - - self.pg3.add_stream(p_offer) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - rx = self.pg3.get_capture(1) - self.verify_orig_dhcp_request(rx[0], self.pg3, hostname, - self.pg3.local_ip4) - - # - # Send an acknowledgment - # - p_ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst='255.255.255.255') / - UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) / - BOOTP(op=1, yiaddr=self.pg3.local_ip4, - chaddr=mac_pton(self.pg3.local_mac)) / - DHCP(options=[('message-type', 'ack'), - ('subnet_mask', '255.255.255.0'), - ('router', self.pg3.remote_ip4), - ('server_id', self.pg3.remote_ip4), - ('lease_time', lease_time), - 'end'])) - - self.pg3.add_stream(p_ack) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # - # We'll get an ARP request for the router address - # - rx = self.pg3.get_capture(1) - - self.assertEqual(rx[0][ARP].pdst, self.pg3.remote_ip4) - - # - # At the end of this procedure there should be a connected route - # in the FIB - # - self.assertTrue(find_route(self, self.pg3.local_ip4, 32)) - self.assertTrue(find_route(self, self.pg3.local_ip4, 24)) - - # remove the left over ARP entry - self.vapi.ip_neighbor_add_del(self.pg3.sw_if_index, - self.pg3.remote_mac, - self.pg3.remote_ip4, - is_add=0) - - # - # the route should be gone after the lease expires - # - self.assertTrue(self.wait_for_no_route(self.pg3.local_ip4, 32)) - self.assertTrue(self.wait_for_no_route(self.pg3.local_ip4, 24)) - - # - # remove the DHCP config - # - Client.remove_vpp_config() - - def test_dhcp_client_vlan(self): - """ DHCP Client w/ VLAN""" - - vdscp = VppEnum.vl_api_ip_dscp_t - vqos = VppEnum.vl_api_qos_source_t - hostname = 'universal-dp' - - self.pg_enable_capture(self.pg_interfaces) - - vlan_100 = VppDot1QSubint(self, self.pg3, 100) - vlan_100.admin_up() - - output = [scapy.compat.chb(4)] * 256 - os = b''.join(output) - rows = [{'outputs': os}, - {'outputs': os}, - {'outputs': os}, - {'outputs': os}] - - qem1 = VppQosEgressMap(self, 1, rows).add_vpp_config() - qm1 = VppQosMark(self, vlan_100, qem1, - vqos.QOS_API_SOURCE_VLAN).add_vpp_config() - - # - # Configure DHCP client on PG3 and capture the discover sent - # - Client = VppDHCPClient( - self, - vlan_100.sw_if_index, - hostname, - dscp=vdscp.IP_API_DSCP_EF) - Client.add_vpp_config() - - rx = self.pg3.get_capture(1) - - self.assertEqual(rx[0][Dot1Q].vlan, 100) - self.assertEqual(rx[0][Dot1Q].prio, 2) - - self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname, - dscp=vdscp.IP_API_DSCP_EF) - - -if __name__ == '__main__': - unittest.main(testRunner=VppTestRunner) |