Bugfixing and documentation for SRv6 - vpp

diff options

author	Pablo Camarillo <pcamaril@cisco.com>	2017-03-16 10:43:05 +0100
committer	Damjan Marion <dmarion.lists@gmail.com>	2017-03-29 08:56:05 +0000
commit	4521afa9a643983c789b6b3a77b14c0a95d5e0b2 (patch)
tree	0902086700854c4b6f5597b2cd0bb6f47be77a62 /src/vnet/sr/sr_doc.md
parent	45ce3fbee5c1a7ad2a01f766c9b05059aa467b8f (diff)

Bugfixing and documentation for SRv6

- Fixed three coverity issues - Linked SRv6 docs - Moved sample plugin to examples folder - Fixed bug with hash. Now everything is using mhash. Potentially in the future we want to do bihash. Change-Id: Ie03a13c8fecb1e315e67d0596cbd23220779aaf2 Signed-off-by: Pablo Camarillo <pcamaril@cisco.com>

Diffstat (limited to 'src/vnet/sr/sr_doc.md')

-rw-r--r--

src/vnet/sr/sr_doc.md

132

1 files changed, 13 insertions, 119 deletions

#!/usr/bin/env python import random import socket import unittest from framework import VppTestCase, VppTestRunner from vpp_sub_interface import VppSubInterface, VppDot1QSubint, VppDot1ADSubint from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpMRoute, \ VppMRoutePath, MRouteItfFlags, MRouteEntryFlags, VppMplsIpBind, \ VppMplsTable, VppIpTable from scapy.packet import Raw from scapy.layers.l2 import Ether, Dot1Q, ARP from scapy.layers.inet import IP, UDP, TCP, ICMP, icmptypes, icmpcodes from util import ppp from scapy.contrib.mpls import MPLS class TestIPv4(VppTestCase): """ IPv4 Test Case """ def setUp(self): """ Perform test setup before test case. **Config:** - create 3 pg interfaces - untagged pg0 interface - Dot1Q subinterface on pg1 - Dot1AD subinterface on pg2 - setup interfaces: - put it into UP state - set IPv4 addresses - resolve neighbor address using ARP - configure 200 fib entries :ivar list interfaces: pg interfaces and subinterfaces. :ivar dict flows: IPv4 packet flows in test. :ivar list pg_if_packet_sizes: packet sizes in test. """ super(TestIPv4, self).setUp() # create 3 pg interfaces self.create_pg_interfaces(range(3)) # create 2 subinterfaces for pg1 and pg2 self.sub_interfaces = [ VppDot1QSubint(self, self.pg1, 100), VppDot1ADSubint(self, self.pg2, 200, 300, 400)] # packet flows mapping pg0 -> pg1.sub, pg2.sub, etc. self.flows = dict() self.flows[self.pg0] = [self.pg1.sub_if, self.pg2.sub_if] self.flows[self.pg1.sub_if] = [self.pg0, self.pg2.sub_if] self.flows[self.pg2.sub_if] = [self.pg0, self.pg1.sub_if] # packet sizes self.pg_if_packet_sizes = [64, 512, 1518, 9018] self.sub_if_packet_sizes = [64, 512, 1518 + 4, 9018 + 4] self.interfaces = list(self.pg_interfaces) self.interfaces.extend(self.sub_interfaces) # setup all interfaces for i in self.interfaces: i.admin_up() i.config_ip4() i.resolve_arp() # config 2M FIB entries self.config_fib_entries(200) def tearDown(self): """Run standard test teardown and log ``show ip arp``.""" super(TestIPv4, self).tearDown() if not self.vpp_dead: self.logger.info(self.vapi.cli("show ip arp")) # info(self.vapi.cli("show ip fib")) # many entries def config_fib_entries(self, count): """For each interface add to the FIB table *count* routes to "10.0.0.1/32" destination with interface's local address as next-hop address. :param int count: Number of FIB entries. - *TODO:* check if the next-hop address shouldn't be remote address instead of local address. """ n_int = len(self.interfaces) percent = 0 counter = 0.0 dest_addr = socket.inet_pton(socket.AF_INET, "10.0.0.1") dest_addr_len = 32 for i in self.interfaces: next_hop_address = i.local_ip4n for j in range(count / n_int): self.vapi.ip_add_del_route( dest_addr, dest_addr_len, next_hop_address) counter += 1 if counter / count * 100 > percent: self.logger.info("Configure %d FIB entries .. %d%% done" % (count, percent)) percent += 1 def create_stream(self, src_if, packet_sizes): """Create input packet stream for defined interface. :param VppInterface src_if: Interface to create packet stream for. :param list packet_sizes: Required packet sizes. """ pkts = [] for i in range(0, 257): dst_if = self.flows[src_if][i % 2] info = self.create_packet_info(src_if, dst_if) payload = self.info_to_payload(info) p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) / UDP(sport=1234, dport=1234) / Raw(payload)) info.data = p.copy() if isinstance(src_if, VppSubInterface): p = src_if.add_dot1_layer(p) size = packet_sizes[(i // 2) % len(packet_sizes)] self.extend_packet(p, size) pkts.append(p) return pkts def verify_capture(self, dst_if, capture): """Verify captured input packet stream for defined interface. :param VppInterface dst_if: Interface to verify captured packet stream for. :param list capture: Captured packet stream. """ self.logger.info("Verifying capture on interface %s" % dst_if.name) last_info = dict() for i in self.interfaces: last_info[i.sw_if_index] = None is_sub_if = False dst_sw_if_index = dst_if.sw_if_index if hasattr(dst_if, 'parent'): is_sub_if = True for packet in capture: if is_sub_if: # Check VLAN tags and Ethernet header packet = dst_if.remove_dot1_layer(packet) self.assertTrue(Dot1Q not in packet) try: ip = packet[IP] udp = packet[UDP] payload_info = self.payload_to_info(str(packet[Raw])) packet_index = payload_info.index self.assertEqual(payload_info.dst, dst_sw_if_index) self.logger.debug( "Got packet on port %s: src=%u (id=%u)" % (dst_if.name, payload_info.src, packet_index)) next_info = self.get_next_packet_info_for_interface2( payload_info.src, dst_sw_if_index, last_info[payload_info.src]) last_info[payload_info.src] = next_info self.assertTrue(next_info is not None) self.assertEqual(packet_index, next_info.index) saved_packet = next_info.data # Check standard fields self.assertEqual(ip.src, saved_packet[IP].src) self.assertEqual(ip.dst, saved_packet[IP].dst) self.assertEqual(udp.sport, saved_packet[UDP].sport) self.assertEqual(udp.dport, saved_packet[UDP].dport) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise for i in self.interfaces: remaining_packet = self.get_next_packet_info_for_interface2( i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index]) self.assertTrue(remaining_packet is None, "Interface %s: Packet expected from interface %s " "didn't arrive" % (dst_if.name, i.name)) def test_fib(self): """ IPv4 FIB test Test scenario: - Create IPv4 stream for pg0 interface - Create IPv4 tagged streams for pg1's and pg2's subinterface. - Send and verify received packets on each interface. """ pkts = self.create_stream(self.pg0, self.pg_if_packet_sizes) self.pg0.add_stream(pkts) for i in self.sub_interfaces: pkts = self.create_stream(i, self.sub_if_packet_sizes) i.parent.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() pkts = self.pg0.get_capture() self.verify_capture(self.pg0, pkts) for i in self.sub_interfaces: pkts = i.parent.get_capture() self.verify_capture(i, pkts) class TestIPv4FibCrud(VppTestCase): """ FIB - add/update/delete - ip4 routes Test scenario: - add 1k, - del 100, - add new 1k, - del 1.5k ..note:: Python API is too slow to add many routes, needs replacement. """ def config_fib_many_to_one(self, start_dest_addr, next_hop_addr, count): """ :param start_dest_addr: :param next_hop_addr: :param count: :return list: added ips with 32 prefix """ added_ips = [] dest_addr = int(socket.inet_pton(socket.AF_INET, start_dest_addr).encode('hex'), 16) dest_addr_len = 32 n_next_hop_addr = socket.inet_pton(socket.AF_INET, next_hop_addr) for _ in range(count): n_dest_addr = '{:08x}'.format(dest_addr).decode('hex') self.vapi.ip_add_del_route(n_dest_addr, dest_addr_len, n_next_hop_addr) added_ips.append(socket.inet_ntoa(n_dest_addr)) dest_addr += 1 return added_ips def unconfig_fib_many_to_one(self, start_dest_addr, next_hop_addr, count): removed_ips = [] dest_addr = int(socket.inet_pton(socket.AF_INET, start_dest_addr).encode('hex'), 16) dest_addr_len = 32 n_next_hop_addr = socket.inet_pton(socket.AF_INET, next_hop_addr) for _ in range(count): n_dest_addr = '{:08x}'.format(dest_addr).decode('hex') self.vapi.ip_add_del_route(n_dest_addr, dest_addr_len, n_next_hop_addr, is_add=0) removed_ips.append(socket.inet_ntoa(n_dest_addr)) dest_addr += 1 return removed_ips def create_stream(self, src_if, dst_if, dst_ips, count): pkts = [] for _ in range(count): dst_addr = random.choice(dst_ips) info = self.create_packet_info(src_if, dst_if) payload = self.info_to_payload(info) p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / IP(src=src_if.remote_ip4, dst=dst_addr) / UDP(sport=1234, dport=1234) / Raw(payload)) info.data = p.copy() self.extend_packet(p, random.choice(self.pg_if_packet_sizes)) pkts.append(p) return pkts def _find_ip_match(self, find_in, pkt): for p in find_in: if self.payload_to_info(str(p[Raw])) == \ self.payload_to_info(str(pkt[Raw])): if p[IP].src != pkt[IP].src: break if p[IP].dst != pkt[IP].dst: break if p[UDP].sport != pkt[UDP].sport: break if p[UDP].dport != pkt[UDP].dport: break return p return None @staticmethod def _match_route_detail(route_detail, ip, address_length=32, table_id=0): if route_detail.address == socket.inet_pton(socket.AF_INET, ip): if route_detail.table_id != table_id: return False elif route_detail.address_length != address_length: return False else: return True else: return False def verify_capture(self, dst_interface, received_pkts, expected_pkts): self.assertEqual(len(received_pkts), len(expected_pkts)) to_verify = list(expected_pkts) for p in received_pkts: self.assertEqual(p.src, dst_interface.local_mac) self.assertEqual(p.dst, dst_interface.remote_mac) x = self._find_ip_match(to_verify, p) to_verify.remove(x) self.assertListEqual(to_verify, []) def verify_route_dump(self, fib_dump, ips): def _ip_in_route_dump(ip, fib_dump): return next((route for route in fib_dump if self._match_route_detail(route, ip)), False) for ip in ips: self.assertTrue(_ip_in_route_dump(ip, fib_dump), 'IP {} is not in fib dump.'.format(ip)) def verify_not_in_route_dump(self, fib_dump, ips): def _ip_in_route_dump(ip, fib_dump): return next((route for route in fib_dump if self._match_route_detail(route, ip)), False) for ip in ips: self.assertFalse(_ip_in_route_dump(ip, fib_dump), 'IP {} is in fib dump.'.format(ip)) @classmethod def setUpClass(cls): """ #. Create and initialize 3 pg interfaces. #. initialize class attributes configured_routes and deleted_routes to store information between tests. """ super(TestIPv4FibCrud, cls).setUpClass() try: # create 3 pg interfaces cls.create_pg_interfaces(range(3)) cls.interfaces = list(cls.pg_interfaces) # setup all interfaces for i in cls.interfaces: i.admin_up() i.config_ip4() i.resolve_arp() cls.configured_routes = [] cls.deleted_routes = [] cls.pg_if_packet_sizes = [64, 512, 1518, 9018] except Exception: super(TestIPv4FibCrud, cls).tearDownClass() raise def setUp(self): super(TestIPv4FibCrud, self).setUp() self.reset_packet_infos() def test_1_add_routes(self): """ Add 1k routes - add 100 routes check with traffic script. """ # config 1M FIB entries self.configured_routes.extend(self.config_fib_many_to_one( "10.0.0.0", self.pg0.remote_ip4, 100)) fib_dump = self.vapi.ip_fib_dump() self.verify_route_dump(fib_dump, self.configured_routes) self.stream_1 = self.create_stream( self.pg1, self.pg0, self.configured_routes, 100) self.stream_2 = self.create_stream( self.pg2, self.pg0, self.configured_routes, 100) self.pg1.add_stream(self.stream_1) self.pg2.add_stream(self.stream_2) self.pg_enable_capture(self.pg_interfaces) self.pg_start() pkts = self.pg0.get_capture(len(self.stream_1) + len(self.stream_2)) self.verify_capture(self.pg0, pkts, self.stream_1 + self.stream_2) def test_2_del_routes(self): """ Delete 100 routes - delete 10 routes check with traffic script. """ self.deleted_routes.extend(self.unconfig_fib_many_to_one( "10.0.0.10", self.pg0.remote_ip4, 10)) for x in self.deleted_routes: self.configured_routes.remove(x) fib_dump = self.vapi.ip_fib_dump() self.verify_route_dump(fib_dump, self.configured_routes) self.stream_1 = self.create_stream( self.pg1, self.pg0, self.configured_routes, 100) self.stream_2 = self.create_stream( self.pg2, self.pg0, self.configured_routes, 100) self.stream_3 = self.create_stream( self.pg1, self.pg0, self.deleted_routes, 100) self.stream_4 = self.create_stream( self.pg2, self.pg0, self.deleted_routes, 100) self.pg1.add_stream(self.stream_1 + self.stream_3) self.pg2.add_stream(self.stream_2 + self.stream_4) self.pg_enable_capture(self.pg_interfaces) self.pg_start() pkts = self.pg0.get_capture(len(self.stream_1) + len(self.stream_2)) self.verify_capture(self.pg0, pkts, self.stream_1 + self.stream_2) def test_3_add_new_routes(self): """ Add 1k routes - re-add 5 routes check with traffic script. - add 100 routes check with traffic script. """ tmp = self.config_fib_many_to_one( "10.0.0.10", self.pg0.remote_ip4, 5) self.configured_routes.extend(tmp) for x in tmp: self.deleted_routes.remove(x) self.configured_routes.extend(self.config_fib_many_to_one( "10.0.1.0", self.pg0.remote_ip4, 100)) fib_dump = self.vapi.ip_fib_dump() self.verify_route_dump(fib_dump, self.configured_routes) self.stream_1 = self.create_stream( self.pg1, self.pg0, self.configured_routes, 300) self.stream_2 = self.create_stream( self.pg2, self.pg0, self.configured_routes, 300) self.stream_3 = self.create_stream( self.pg1, self.pg0, self.deleted_routes, 100) self.stream_4 = self.create_stream( self.pg2, self.pg0, self.deleted_routes, 100) self.pg1.add_stream(self.stream_1 + self.stream_3) self.pg2.add_stream(self.stream_2 + self.stream_4) self.pg_enable_capture(self.pg_interfaces) self.pg_start() pkts = self.pg0.get_capture(len(self.stream_1) + len(self.stream_2)) self.verify_capture(self.pg0, pkts, self.stream_1 + self.stream_2) def test_4_del_routes(self): """ Delete 1.5k routes - delete 5 routes check with traffic script. - add 100 routes check with traffic script. """ self.deleted_routes.extend(self.unconfig_fib_many_to_one( "10.0.0.0", self.pg0.remote_ip4, 15)) self.deleted_routes.extend(self.unconfig_fib_many_to_one( "10.0.0.20", self.pg0.remote_ip4, 85)) self.deleted_routes.extend(self.unconfig_fib_many_to_one( "10.0.1.0", self.pg0.remote_ip4, 100)) fib_dump = self.vapi.ip_fib_dump() self.verify_not_in_route_dump(fib_dump, self.deleted_routes) class TestIPNull(VppTestCase): """ IPv4 routes via NULL """ def setUp(self): super(TestIPNull, self).setUp() # create 2 pg interfaces self.create_pg_interfaces(range(1)) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.resolve_arp() def tearDown(self): super(TestIPNull, self).tearDown() for i in self.pg_interfaces: i.unconfig_ip4() i.admin_down() def test_ip_null(self): """ IP NULL route """ # # A route via IP NULL that will reply with ICMP unreachables # ip_unreach = VppIpRoute(self, "10.0.0.1", 32, [], is_unreach=1) ip_unreach.add_vpp_config() p_unreach = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst="10.0.0.1") / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) self.pg0.add_stream(p_unreach) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(1) rx = rx[0] icmp = rx[ICMP] self.assertEqual(icmptypes[icmp.type], "dest-unreach") self.assertEqual(icmpcodes[icmp.type][icmp.code], "host-unreachable") self.assertEqual(icmp.src, self.pg0.remote_ip4) self.assertEqual(icmp.dst, "10.0.0.1") # # ICMP replies are rate limited. so sit and spin. # self.sleep(1) # # A route via IP NULL that will reply with ICMP prohibited # ip_prohibit = VppIpRoute(self, "10.0.0.2", 32, [], is_prohibit=1) ip_prohibit.add_vpp_config() p_prohibit = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst="10.0.0.2") / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) self.pg0.add_stream(p_prohibit) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(1) rx = rx[0] icmp = rx[ICMP] self.assertEqual(icmptypes[icmp.type], "dest-unreach") self.assertEqual(icmpcodes[icmp.type][icmp.code], "host-prohibited") self.assertEqual(icmp.src, self.pg0.remote_ip4) self.assertEqual(icmp.dst, "10.0.0.2") class TestIPDisabled(VppTestCase): """ IPv4 disabled """ def setUp(self): super(TestIPDisabled, self).setUp() # create 2 pg interfaces self.create_pg_interfaces(range(2)) # PG0 is IP enalbed self.pg0.admin_up() self.pg0.config_ip4() self.pg0.resolve_arp() # PG 1 is not IP enabled self.pg1.admin_up() def tearDown(self): super(TestIPDisabled, self).tearDown() for i in self.pg_interfaces: i.unconfig_ip4() i.admin_down() def test_ip_disabled(self): """ IP Disabled """ # # An (S,G). # one accepting interface, pg0, 2 forwarding interfaces # route_232_1_1_1 = VppIpMRoute( self, "0.0.0.0", "232.1.1.1", 32, MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE, [VppMRoutePath(self.pg1.sw_if_index, MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT), VppMRoutePath(self.pg0.sw_if_index, MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)]) route_232_1_1_1.add_vpp_config() pu = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src="10.10.10.10", dst=self.pg0.remote_ip4) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) pm = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src="10.10.10.10", dst="232.1.1.1") / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) # # PG1 does not forward IP traffic # self.send_and_assert_no_replies(self.pg1, pu, "IP disabled") self.send_and_assert_no_replies(self.pg1, pm, "IP disabled") # # IP enable PG1 # self.pg1.config_ip4() # # Now we get packets through # self.pg1.add_stream(pu) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(1) self.pg1.add_stream(pm) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(1) # # Disable PG1 # self.pg1.unconfig_ip4() # # PG1 does not forward IP traffic # self.send_and_assert_no_replies(self.pg1, pu, "IP disabled") self.send_and_assert_no_replies(self.pg1, pm, "IP disabled") class TestIPSubNets(VppTestCase): """ IPv4 Subnets """ def setUp(self): super(TestIPSubNets, self).setUp() # create a 2 pg interfaces self.create_pg_interfaces(range(2)) # pg0 we will use to experiemnt self.pg0.admin_up() # pg1 is setup normally self.pg1.admin_up() self.pg1.config_ip4() self.pg1.resolve_arp() def tearDown(self): super(TestIPSubNets, self).tearDown() for i in self.pg_interfaces: i.admin_down() def test_ip_sub_nets(self): """ IP Sub Nets """ # # Configure a covering route to forward so we know # when we are dropping # cover_route = VppIpRoute(self, "10.0.0.0", 8, [VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index)]) cover_route.add_vpp_config() p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(dst="10.10.10.10", src=self.pg0.local_ip4) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) # # Configure some non-/24 subnets on an IP interface # ip_addr_n = socket.inet_pton(socket.AF_INET, "10.10.10.10") self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, ip_addr_n, 16) pn = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(dst="10.10.0.0", src=self.pg0.local_ip4) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) pb = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(dst="10.10.255.255", src=self.pg0.local_ip4) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) self.send_and_assert_no_replies(self.pg1, pn, "IP Network address") self.send_and_assert_no_replies(self.pg1, pb, "IP Broadcast address") # remove the sub-net and we are forwarding via the cover again self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, ip_addr_n, 16, is_add=0) self.pg1.add_stream(pn) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) self.pg1.add_stream(pb) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) # # A /31 is a special case where the 'other-side' is an attached host # packets to that peer generate ARP requests # ip_addr_n = socket.inet_pton(socket.AF_INET, "10.10.10.10") self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, ip_addr_n, 31) pn = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(dst="10.10.10.11", src=self.pg0.local_ip4) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) self.pg1.add_stream(pn) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(1) rx[ARP] # remove the sub-net and we are forwarding via the cover again self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, ip_addr_n, 31, is_add=0) self.pg1.add_stream(pn) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) class TestIPLoadBalance(VppTestCase): """ IPv4 Load-Balancing """ def setUp(self): super(TestIPLoadBalance, self).setUp() self.create_pg_interfaces(range(5)) mpls_tbl = VppMplsTable(self, 0) mpls_tbl.add_vpp_config() for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.resolve_arp() i.enable_mpls() def tearDown(self): for i in self.pg_interfaces: i.disable_mpls() i.unconfig_ip4() i.admin_down() super(TestIPLoadBalance, self).tearDown() def send_and_expect_load_balancing(self, input, pkts, outputs): input.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() for oo in outputs: rx = oo._get_capture(1) self.assertNotEqual(0, len(rx)) def send_and_expect_one_itf(self, input, pkts, itf): input.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = itf.get_capture(len(pkts)) def test_ip_load_balance(self): """ IP Load-Balancing """ # # An array of packets that differ only in the destination port # port_ip_pkts = [] port_mpls_pkts = [] # # An array of packets that differ only in the source address # src_ip_pkts = [] src_mpls_pkts = [] for ii in range(65): port_ip_hdr = (IP(dst="10.0.0.1", src="20.0.0.1") / UDP(sport=1234, dport=1234 + ii) / Raw('\xa5' * 100)) port_ip_pkts.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / port_ip_hdr)) port_mpls_pkts.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / MPLS(label=66, ttl=2) / port_ip_hdr)) src_ip_hdr = (IP(dst="10.0.0.1", src="20.0.0.%d" % ii) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) src_ip_pkts.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / src_ip_hdr)) src_mpls_pkts.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / MPLS(label=66, ttl=2) / src_ip_hdr)) route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32, [VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index), VppRoutePath(self.pg2.remote_ip4, self.pg2.sw_if_index)]) route_10_0_0_1.add_vpp_config() binding = VppMplsIpBind(self, 66, "10.0.0.1", 32) binding.add_vpp_config() # # inject the packet on pg0 - expect load-balancing across the 2 paths # - since the default hash config is to use IP src,dst and port # src,dst # We are not going to ensure equal amounts of packets across each link, # since the hash algorithm is statistical and therefore this can never # be guaranteed. But wuth 64 different packets we do expect some # balancing. So instead just ensure there is traffic on each link. # self.send_and_expect_load_balancing(self.pg0, port_ip_pkts, [self.pg1, self.pg2]) self.send_and_expect_load_balancing(self.pg0, src_ip_pkts, [self.pg1, self.pg2]) self.send_and_expect_load_balancing(self.pg0, port_mpls_pkts, [self.pg1, self.pg2]) self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts, [self.pg1, self.pg2]) # # change the flow hash config so it's only IP src,dst # - now only the stream with differing source address will # load-balance # self.vapi.set_ip_flow_hash(0, src=1, dst=1, sport=0, dport=0) self.send_and_expect_load_balancing(self.pg0, src_ip_pkts, [self.pg1, self.pg2]) self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts, [self.pg1, self.pg2]) self.send_and_expect_one_itf(self.pg0, port_ip_pkts, self.pg2) # # change the flow hash config back to defaults # self.vapi.set_ip_flow_hash(0, src=1, dst=1, sport=1, dport=1) # # Recursive prefixes # - testing that 2 stages of load-balancing occurs and there is no # polarisation (i.e. only 2 of 4 paths are used) # port_pkts = [] src_pkts = [] for ii in range(257): port_pkts.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(dst="1.1.1.1", src="20.0.0.1") / UDP(sport=1234, dport=1234 + ii) / Raw('\xa5' * 100))) src_pkts.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(dst="1.1.1.1", src="20.0.0.%d" % ii) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100))) route_10_0_0_2 = VppIpRoute(self, "10.0.0.2", 32, [VppRoutePath(self.pg3.remote_ip4, self.pg3.sw_if_index), VppRoutePath(self.pg4.remote_ip4, self.pg4.sw_if_index)]) route_10_0_0_2.add_vpp_config() route_1_1_1_1 = VppIpRoute(self, "1.1.1.1", 32, [VppRoutePath("10.0.0.2", 0xffffffff), VppRoutePath("10.0.0.1", 0xffffffff)]) route_1_1_1_1.add_vpp_config() # # inject the packet on pg0 - expect load-balancing across all 4 paths # self.vapi.cli("clear trace") self.send_and_expect_load_balancing(self.pg0, port_pkts, [self.pg1, self.pg2, self.pg3, self.pg4]) self.send_and_expect_load_balancing(self.pg0, src_pkts, [self.pg1, self.pg2, self.pg3, self.pg4]) # # Recursive prefixes # - testing that 2 stages of load-balancing, no choices # port_pkts = [] for ii in range(257): port_pkts.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(dst="1.1.1.2", src="20.0.0.2") / UDP(sport=1234, dport=1234 + ii) / Raw('\xa5' * 100))) route_10_0_0_3 = VppIpRoute(self, "10.0.0.3", 32, [VppRoutePath(self.pg3.remote_ip4, self.pg3.sw_if_index)]) route_10_0_0_3.add_vpp_config() route_1_1_1_2 = VppIpRoute(self, "1.1.1.2", 32, [VppRoutePath("10.0.0.3", 0xffffffff)]) route_1_1_1_2.add_vpp_config() # # inject the packet on pg0 - expect load-balancing across all 4 paths # self.vapi.cli("clear trace") self.send_and_expect_one_itf(self.pg0, port_pkts, self.pg3) class TestIPVlan0(VppTestCase): """ IPv4 VLAN-0 """ def setUp(self): super(TestIPVlan0, self).setUp() self.create_pg_interfaces(range(2)) mpls_tbl = VppMplsTable(self, 0) mpls_tbl.add_vpp_config() for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.resolve_arp() i.enable_mpls() def tearDown(self): for i in self.pg_interfaces: i.disable_mpls() i.unconfig_ip4() i.admin_down() super(TestIPVlan0, self).tearDown() def test_ip_vlan_0(self): """ IP VLAN-0 """ pkts = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / Dot1Q(vlan=0) / IP(dst=self.pg1.remote_ip4, src=self.pg0.remote_ip4) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) * 65 # # Expect that packets sent on VLAN-0 are forwarded on the # main interface. # self.send_and_expect(self.pg0, pkts, self.pg1) class TestIPPunt(VppTestCase): """ IPv4 Punt Police/Redirect """ def setUp(self): super(TestIPPunt, self).setUp() self.create_pg_interfaces(range(2)) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.resolve_arp() def tearDown(self): super(TestIPPunt, self).tearDown() for i in self.pg_interfaces: i.unconfig_ip4() i.admin_down() def test_ip_punt(self): """ IP punt police and redirect """ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) / TCP(sport=1234, dport=1234) / Raw('\xa5' * 100)) pkts = p * 1025 # # Configure a punt redirect via pg1. # nh_addr = socket.inet_pton(socket.AF_INET, self.pg1.remote_ip4) self.vapi.ip_punt_redirect(self.pg0.sw_if_index, self.pg1.sw_if_index, nh_addr) self.send_and_expect(self.pg0, pkts, self.pg1) # # add a policer # policer = self.vapi.policer_add_del("ip4-punt", 400, 0, 10, 0, rate_type=1) self.vapi.ip_punt_police(policer.policer_index) self.vapi.cli("clear trace") self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # # the number of packet recieved should be greater than 0, # but not equal to the number sent, since some were policed # rx = self.pg1._get_capture(1) self.assertTrue(len(rx) > 0) self.assertTrue(len(rx) < len(pkts)) # # remove the poilcer. back to full rx # self.vapi.ip_punt_police(policer.policer_index, is_add=0) self.vapi.policer_add_del("ip4-punt", 400, 0, 10, 0, rate_type=1, is_add=0) self.send_and_expect(self.pg0, pkts, self.pg1) # # remove the redirect. expect full drop. # self.vapi.ip_punt_redirect(self.pg0.sw_if_index, self.pg1.sw_if_index, nh_addr, is_add=0) self.send_and_assert_no_replies(self.pg0, pkts, "IP no punt config") # # Add a redirect that is not input port selective # self.vapi.ip_punt_redirect(0xffffffff, self.pg1.sw_if_index, nh_addr) self.send_and_expect(self.pg0, pkts, self.pg1) self.vapi.ip_punt_redirect(0xffffffff, self.pg1.sw_if_index, nh_addr, is_add=0) class TestIPDeag(VppTestCase): """ IPv4 Deaggregate Routes """ def setUp(self): super(TestIPDeag, self).setUp() self.create_pg_interfaces(range(3)) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.resolve_arp() def tearDown(self): super(TestIPDeag, self).tearDown() for i in self.pg_interfaces: i.unconfig_ip4() i.admin_down() def test_ip_deag(self): """ IP Deag Routes """ # # Create a table to be used for: # 1 - another destination address lookup # 2 - a source address lookup # table_dst = VppIpTable(self, 1) table_src = VppIpTable(self, 2) table_dst.add_vpp_config() table_src.add_vpp_config() # # Add a route in the default table to point to a deag/ # second lookup in each of these tables # route_to_dst = VppIpRoute(self, "1.1.1.1", 32, [VppRoutePath("0.0.0.0", 0xffffffff, nh_table_id=1)]) route_to_src = VppIpRoute(self, "1.1.1.2", 32, [VppRoutePath("0.0.0.0", 0xffffffff, nh_table_id=2, is_source_lookup=1)]) route_to_dst.add_vpp_config() route_to_src.add_vpp_config() # # packets to these destination are dropped, since they'll # hit the respective default routes in the second table # p_dst = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src="5.5.5.5", dst="1.1.1.1") / TCP(sport=1234, dport=1234) / Raw('\xa5' * 100)) p_src = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src="2.2.2.2", dst="1.1.1.2") / TCP(sport=1234, dport=1234) / Raw('\xa5' * 100)) pkts_dst = p_dst * 257 pkts_src = p_src * 257 self.send_and_assert_no_replies(self.pg0, pkts_dst, "IP in dst table") self.send_and_assert_no_replies(self.pg0, pkts_src, "IP in src table") # # add a route in the dst table to forward via pg1 # route_in_dst = VppIpRoute(self, "1.1.1.1", 32, [VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index)], table_id=1) route_in_dst.add_vpp_config() self.send_and_expect(self.pg0, pkts_dst, self.pg1) # # add a route in the src table to forward via pg2 # route_in_src = VppIpRoute(self, "2.2.2.2", 32, [VppRoutePath(self.pg2.remote_ip4, self.pg2.sw_if_index)], table_id=2) route_in_src.add_vpp_config() self.send_and_expect(self.pg0, pkts_src, self.pg2) class TestIPInput(VppTestCase): """ IPv4 Input Exceptions """ def setUp(self): super(TestIPInput, self).setUp() self.create_pg_interfaces(range(2)) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.resolve_arp() def tearDown(self): super(TestIPInput, self).tearDown() for i in self.pg_interfaces: i.unconfig_ip4() i.admin_down() def test_ip_input(self): """ IP Input Exceptions """ # i can't find a way in scapy to construct an IP packet # with a length less than the IP header length # # Packet too short - this is forwarded # p_short = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, len=40) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) rx = self.send_and_expect(self.pg0, p_short * 65, self.pg1) # # Packet too long - this is dropped # p_long = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, len=400) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) rx = self.send_and_assert_no_replies(self.pg0, p_long * 65, "too long") # # bad chksum - this is dropped # p_chksum = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, chksum=400) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) rx = self.send_and_assert_no_replies(self.pg0, p_chksum * 65, "bad checksum") # # bad version - this is dropped # p_ver = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, version=3) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) rx = self.send_and_assert_no_replies(self.pg0, p_ver * 65, "funky version") # # fragment offset 1 - this is dropped # p_frag = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, frag=1) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) rx = self.send_and_assert_no_replies(self.pg0, p_frag * 65, "frag offset") # # TTL expired packet # p_ttl = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=1) / UDP(sport=1234, dport=1234) / Raw('\xa5' * 100)) rx = self.send_and_expect(self.pg0, p_ttl * 65, self.pg0) rx = rx[0] icmp = rx[ICMP] self.assertEqual(icmptypes[icmp.type], "time-exceeded") self.assertEqual(icmpcodes[icmp.type][icmp.code], "ttl-zero-during-transit") self.assertEqual(icmp.src, self.pg0.remote_ip4) self.assertEqual(icmp.dst, self.pg1.remote_ip4) if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)


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