vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2018-06-07	dpdk: fix interface naming issue	Damjan Marion	1	-2/+9
2018-06-07	Revert "Allow arp-input node to learn IPv4 neighbors from GARP packets"	John Lo	1	-5/+0
2018-06-07	dpdk: failsafe PMD initialization code	Rui Cai	2	-1/+26
2018-06-07	DHCP Client Dump	Neale Ranns	6	-73/+245
2018-06-07	Add support for DPDK 18.05	Damjan Marion	5	-44/+119
2018-06-07	Allow arp-input node to learn IPv4 neighbors from GARP packets	John Lo	1	-0/+5
2018-06-06	Alter logging semantics for VPP PAPI object	Ian Wells	1	-2/+11
2018-06-05	bond: send gratuitous arp when the active slave went down in active-backup mode	Steven	10	-40/+111
2018-06-05	lb api: correct byte order of new_flows_table_length argument	Andrey "Zed" Zaikin	1	-1/+1
2018-06-05	VPP API: Memory trace	Ole Troan	12	-35/+188
2018-06-05	VPP-1305: Add support for tags	Jerome Tollet	2	-2/+18
2018-06-05	BIER CLI show commands; no crash on non-existant objects (VPP-1303)	Neale Ranns	3	-6/+27
2018-06-04	Configure or deduce CLIB_LOG2_CACHE_LINE_BYTES (VPP-1064)	Dave Barach	4	-1/+90
2018-06-04	ip4: optimize ip4_local	Florin Coras	2	-253/+319
2018-06-04	Fix API trace dump for tapv2	Milan Lenco	1	-3/+3
2018-06-04	Remove unused GRE buffer meta-data	Neale Ranns	1	-6/+0
2018-06-04	flow:add enabled hw format function	Eyal Bari	2	-0/+25
2018-06-04	ip: save fib index for buffer in ip lookup	Florin Coras	5	-114/+65
2018-06-04	fix usage string missing arg	Jerome Tollet	1	-1/+1
2018-06-04	Join the VAC read timeout thread	Neale Ranns	1	-21/+25
2018-06-03	dpdk: buffer free optimizations	Damjan Marion	1	-76/+61
2018-06-03	dpdk: improve buffer alloc perfomance	Damjan Marion	3	-73/+56
2018-06-03	Interface Tag: memset field in VOM, clear the tag in VPP on interface delete	Neale Ranns	1	-0/+1
2018-06-02	AVF input node rework	Damjan Marion	3	-203/+337
2018-06-02	acl-plugin: multicore: session management fixes	Andrew Yourtchenko	6	-151/+332
2018-06-01	session: improve disconnect handling	Florin Coras	4	-12/+39
2018-05-31	Improve L2FIB delete entry handling and "show l2fib" CLI options	John Lo	5	-56/+71
2018-05-31	dpdk: Decoupling the meaning of xd->device_index in dpdk_plugin	Rui Cai	9	-81/+99
2018-05-31	Fix TLS issue to load certification and key	Ping Yu	1	-0/+2
2018-05-31	fix socket send() return size check	qchang	1	-1/+1
2018-05-31	fix missing void pointer explicit type cast	Zhiyong Yang	1	-1/+1
2018-05-31	VPP-1299: Reset uid/gid on shared memory segment if client starts first.	Ole Troan	1	-0/+4
2018-05-31	Add src/vlib/config.h.in template	Damjan Marion	3	-6/+29
2018-05-30	Fix clang compilation on aarch64: value size does not match register size.	Sirshak Das	1	-1/+1
2018-05-30	vppinfra: explicitely state for signed types that they are signed	Damjan Marion	9	-20/+20
2018-05-30	dpdk: rename port_id to *_instance_num	Damjan Marion	4	-9/+10
2018-05-30	Fix clang compilation on aarch64: sizeof operator error.	Sirshak Das	1	-1/+1
2018-05-30	IPv6 for-us/receive multicast routes fix	Neale Ranns	1	-0/+4
2018-05-30	session: fix v6 unbinds that use uri api	Florin Coras	1	-2/+6
2018-05-30	session: fix session table retrieval	Florin Coras	1	-2/+2
2018-05-30	bonding: fix packet trace in bond-input	Damjan Marion	1	-5/+1
2018-05-29	Revert "dpdk: set dmamap iova address value according to eal_iova_mode"	Damjan Marion	1	-4/+1
2018-05-29	Add VLIB_NODE_FN() macro to simplify multiversioning of node functions	Damjan Marion	19	-284/+160
2018-05-29	af_packet: Add support for dump interfaces	Mohsin Kazmi	6	-1/+158
2018-05-29	dpdk: Add PMD type for Cavium LiquidIO II CN23XX	chuhong yao	3	-1/+13
2018-05-29	Fixed vlib_buffer_clone with stale chained buffers	Yoann Desmouceaux	1	-2/+7
2018-05-29	dpdk: mempool priv intialization must be done before releasing buffers to pool	Sachin Saxena	1	-8/+7
2018-05-29	ipsec: fix IKEv2 crash when rsa cert is used for authentication	Radu Nicolau	1	-0/+1
2018-05-28	NAT44: code cleanup and refactor (VPP-1285)	Matus Fabian	17	-463/+631
2018-05-28	Change optimizaton level from tree-vectorize to O3	Damjan Marion	1	-1/+1

#!/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 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 from vpp_papi import mac_pton 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=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, mac_pton(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=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 # 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=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=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=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, mac_pton(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=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, mac_pton(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)