| #!/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 |
| from vpp_mac import mactobinary, binarytomac |
| from scapy.layers.l2 import Ether, getmacbyip, ARP |
| 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 |
| |
| DHCP4_CLIENT_PORT = 68 |
| DHCP4_SERVER_PORT = 67 |
| DHCP6_CLIENT_PORT = 547 |
| DHCP6_SERVER_PORT = 546 |
| |
| |
| class TestDHCP(VppTestCase): |
| """ DHCP Test Case """ |
| |
| 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 type(i) is 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 type(i) is 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 type(o) is 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): |
| 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, "0.0.0.0") |
| |
| 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=1): |
| self.verify_orig_dhcp_pkt(pkt, intf) |
| |
| 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=1): |
| self.verify_orig_dhcp_pkt(pkt, intf) |
| |
| 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] |
| 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_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 type(o) is 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 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_ip4n |
| src_addr = self.pg0.local_ip4n |
| |
| self.vapi.dhcp_proxy_config(server_addr, |
| src_addr, |
| rx_table_id=0) |
| |
| # |
| # 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] + chr(33) + option_82[9:] |
| |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / |
| UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / |
| BOOTP(op=1) / |
| DHCP(options=[('message-type', 'offer'), |
| ('relay_agent_Information', bad_ip), |
| ('end')])) |
| pkts = [p] |
| self.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] + chr(33) + option_82[3:] |
| |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / |
| UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) / |
| BOOTP(op=1) / |
| DHCP(options=[('message-type', 'offer'), |
| ('relay_agent_Information', bad_if_index), |
| ('end')])) |
| pkts = [p] |
| self.send_and_assert_no_replies(self.pg0, pkts, |
| "DHCP offer option 82 bad if index") |
| |
| # |
| # Send a DHCP request in VRF 1. should be dropped. |
| # |
| self.send_and_assert_no_replies(self.pg4, pkts_disc_vrf1, |
| "DHCP with no configuration VRF 1") |
| |
| # |
| # Delete the DHCP config in VRF 0 |
| # Should now drop requests. |
| # |
| self.vapi.dhcp_proxy_config(server_addr, |
| src_addr, |
| rx_table_id=0, |
| is_add=0) |
| |
| 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_ip4n |
| src_addr1 = self.pg1.local_ip4n |
| self.vapi.dhcp_proxy_config(server_addr1, |
| src_addr1, |
| rx_table_id=1, |
| server_table_id=1) |
| server_addr2 = self.pg2.remote_ip4n |
| src_addr2 = self.pg2.local_ip4n |
| self.vapi.dhcp_proxy_config(server_addr2, |
| src_addr2, |
| rx_table_id=2, |
| server_table_id=2) |
| |
| # |
| # 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 = socket.inet_pton(AF_INET, self.pg1.remote_hosts[1].ip4) |
| |
| self.vapi.dhcp_proxy_config(server_addr12, |
| src_addr1, |
| rx_table_id=1, |
| server_table_id=1, |
| is_add=1) |
| |
| # |
| # 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 |
| # |
| self.vapi.dhcp_proxy_config(server_addr12, |
| src_addr1, |
| rx_table_id=1, |
| server_table_id=1, |
| is_add=0) |
| |
| # |
| # 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 |
| # |
| self.vapi.dhcp_proxy_config(server_addr1, |
| src_addr1, |
| rx_table_id=1, |
| server_table_id=1, |
| is_add=0) |
| self.vapi.dhcp_proxy_config(server_addr2, |
| src_addr2, |
| rx_table_id=2, |
| server_table_id=2, |
| is_add=0) |
| |
| 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_ip6n |
| src_addr_vrf0 = self.pg0.local_ip6n |
| server_addr_vrf1 = self.pg1.remote_ip6n |
| src_addr_vrf1 = self.pg1.local_ip6n |
| server_addr_vrf2 = self.pg2.remote_ip6n |
| src_addr_vrf2 = self.pg2.local_ip6n |
| |
| 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 |
| # |
| self.vapi.dhcp_proxy_config(server_addr_vrf0, |
| src_addr_vrf0, |
| rx_table_id=0, |
| server_table_id=0, |
| is_ipv6=1) |
| |
| 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 |
| # |
| self.vapi.dhcp_proxy_config(server_addr_vrf1, |
| src_addr_vrf1, |
| rx_table_id=1, |
| server_table_id=1, |
| is_ipv6=1) |
| self.pg4.config_ip6() |
| |
| self.vapi.dhcp_proxy_config(server_addr_vrf2, |
| src_addr_vrf2, |
| rx_table_id=2, |
| server_table_id=2, |
| is_ipv6=1) |
| 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 |
| # table=1, vss_type=1, vpn_index=1, oui=4 |
| # table=2, vss_type=0, vpn_id = "ip6-table-2" |
| self.vapi.dhcp_proxy_set_vss(1, 1, oui=4, vpn_index=1, is_ip6=1) |
| self.vapi.dhcp_proxy_set_vss(2, 0, "IPv6-table-2", is_ip6=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_ip6=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 = socket.inet_pton(AF_INET6, |
| self.pg1.remote_hosts[1].ip6) |
| |
| self.vapi.dhcp_proxy_config(server_addr12, |
| src_addr_vrf1, |
| rx_table_id=1, |
| server_table_id=1, |
| is_ipv6=1) |
| |
| # |
| # 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, |
| af=AF_INET6) |
| 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 |
| # |
| self.vapi.dhcp_proxy_config(server_addr12, |
| src_addr_vrf1, |
| rx_table_id=1, |
| server_table_id=1, |
| is_ipv6=1, |
| is_add=0) |
| |
| # |
| # 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 |
| # |
| self.vapi.dhcp_proxy_config(server_addr_vrf2, |
| src_addr_vrf2, |
| rx_table_id=2, |
| server_table_id=2, |
| is_ipv6=1, |
| is_add=0) |
| self.vapi.dhcp_proxy_config(server_addr_vrf1, |
| src_addr_vrf1, |
| rx_table_id=1, |
| server_table_id=1, |
| is_ipv6=1, |
| is_add=0) |
| self.vapi.dhcp_proxy_config(server_addr_vrf0, |
| src_addr_vrf0, |
| rx_table_id=0, |
| server_table_id=0, |
| is_ipv6=1, |
| is_add=0) |
| |
| # duplicate delete |
| self.vapi.dhcp_proxy_config(server_addr_vrf0, |
| src_addr_vrf0, |
| rx_table_id=0, |
| server_table_id=0, |
| is_ipv6=1, |
| is_add=0) |
| self.pg3.unconfig_ip6() |
| self.pg4.unconfig_ip6() |
| self.pg5.unconfig_ip6() |
| |
| def test_dhcp_client(self): |
| """ DHCP Client""" |
| |
| hostname = 'universal-dp' |
| |
| self.pg_enable_capture(self.pg_interfaces) |
| |
| # |
| # Configure DHCP client on PG3 and capture the discover sent |
| # |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname) |
| |
| 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=mactobinary(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=mactobinary(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, |
| mactobinary(self.pg3.remote_mac), |
| self.pg3.remote_ip4, |
| is_add=0) |
| # |
| # remove the DHCP config |
| # |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) |
| |
| # |
| # 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 |
| # |
| self.pg3.admin_down() |
| self.sleep(1) |
| self.pg3.admin_up() |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, |
| client_id=self.pg3.local_mac) |
| |
| rx = self.pg3.get_capture(1) |
| |
| self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname, |
| self.pg3.local_mac) |
| |
| # 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) |
| |
| # |
| # 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=mactobinary(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 |
| # |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) |
| |
| 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 |
| # |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, |
| set_broadcast_flag=0) |
| |
| rx = self.pg3.get_capture(1) |
| |
| self.verify_orig_dhcp_discover(rx[0], self.pg3, hostname, |
| broadcast=0) |
| |
| # |
| # 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=mactobinary(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=0) |
| |
| # |
| # Send an acknowledgment |
| # |
| 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=mactobinary(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, |
| mactobinary(self.pg3.remote_mac), |
| self.pg3.remote_ip4, |
| is_add=0) |
| |
| # |
| # 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) |
| self.assertEqual(clients[0].lease.is_ipv6, 0) |
| # 0 = DISCOVER, 1 = REQUEST, 2 = BOUND |
| self.assertEqual(clients[0].lease.state, 2) |
| self.assertEqual(clients[0].lease.mask_width, 24) |
| self.assertEqual(clients[0].lease.router_address.rstrip('\0'), |
| self.pg3.remote_ip4n) |
| self.assertEqual(clients[0].lease.host_address.rstrip('\0'), |
| self.pg3.local_ip4n) |
| |
| # |
| # remove the DHCP config |
| # |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) |
| |
| # |
| # 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. |
| # |
| self.pg3.admin_down() |
| self.sleep(1) |
| self.pg3.admin_up() |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname) |
| |
| 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=mactobinary(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=mactobinary(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, |
| mactobinary(self.pg3.remote_mac), |
| self.pg3.remote_ip4, |
| is_add=0) |
| |
| # |
| # Sleep for the lease time |
| # |
| self.sleep(lease_time+1) |
| |
| # |
| # 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)) |
| |
| # |
| # remove the DHCP config |
| # |
| self.vapi.dhcp_client(self.pg3.sw_if_index, hostname, is_add=0) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |