| #!/usr/bin/env python |
| |
| import unittest |
| from socket import AF_INET6 |
| |
| from framework import VppTestCase, VppTestRunner |
| from vpp_sub_interface import VppSubInterface, VppDot1QSubint |
| from vpp_pg_interface import is_ipv6_misc |
| from vpp_ip_route import VppIpRoute, VppRoutePath, find_route, VppIpMRoute, \ |
| VppMRoutePath, MRouteItfFlags, MRouteEntryFlags, VppMplsIpBind, \ |
| VppMplsRoute |
| from vpp_neighbor import find_nbr, VppNeighbor |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether, Dot1Q |
| from scapy.layers.inet6 import IPv6, UDP, ICMPv6ND_NS, ICMPv6ND_RS, \ |
| ICMPv6ND_RA, ICMPv6NDOptSrcLLAddr, getmacbyip6, ICMPv6MRD_Solicitation, \ |
| ICMPv6NDOptMTU, ICMPv6NDOptSrcLLAddr, ICMPv6NDOptPrefixInfo, \ |
| ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, ICMPv6DestUnreach, icmp6types |
| |
| from util import ppp |
| from scapy.utils6 import in6_getnsma, in6_getnsmac, in6_ptop, in6_islladdr, \ |
| in6_mactoifaceid, in6_ismaddr |
| from scapy.utils import inet_pton, inet_ntop |
| from scapy.contrib.mpls import MPLS |
| |
| |
| def mk_ll_addr(mac): |
| euid = in6_mactoifaceid(mac) |
| addr = "fe80::" + euid |
| return addr |
| |
| |
| class TestIPv6ND(VppTestCase): |
| def validate_ra(self, intf, rx, dst_ip=None): |
| if not dst_ip: |
| dst_ip = intf.remote_ip6 |
| |
| # unicasted packets must come to the unicast mac |
| self.assertEqual(rx[Ether].dst, intf.remote_mac) |
| |
| # and from the router's MAC |
| self.assertEqual(rx[Ether].src, intf.local_mac) |
| |
| # the rx'd RA should be addressed to the sender's source |
| self.assertTrue(rx.haslayer(ICMPv6ND_RA)) |
| self.assertEqual(in6_ptop(rx[IPv6].dst), |
| in6_ptop(dst_ip)) |
| |
| # and come from the router's link local |
| self.assertTrue(in6_islladdr(rx[IPv6].src)) |
| self.assertEqual(in6_ptop(rx[IPv6].src), |
| in6_ptop(mk_ll_addr(intf.local_mac))) |
| |
| def validate_na(self, intf, rx, dst_ip=None, tgt_ip=None): |
| if not dst_ip: |
| dst_ip = intf.remote_ip6 |
| if not tgt_ip: |
| dst_ip = intf.local_ip6 |
| |
| # unicasted packets must come to the unicast mac |
| self.assertEqual(rx[Ether].dst, intf.remote_mac) |
| |
| # and from the router's MAC |
| self.assertEqual(rx[Ether].src, intf.local_mac) |
| |
| # the rx'd NA should be addressed to the sender's source |
| self.assertTrue(rx.haslayer(ICMPv6ND_NA)) |
| self.assertEqual(in6_ptop(rx[IPv6].dst), |
| in6_ptop(dst_ip)) |
| |
| # and come from the target address |
| self.assertEqual(in6_ptop(rx[IPv6].src), in6_ptop(tgt_ip)) |
| |
| # Dest link-layer options should have the router's MAC |
| dll = rx[ICMPv6NDOptDstLLAddr] |
| self.assertEqual(dll.lladdr, intf.local_mac) |
| |
| def validate_ns(self, intf, rx, tgt_ip): |
| nsma = in6_getnsma(inet_pton(AF_INET6, tgt_ip)) |
| dst_ip = inet_ntop(AF_INET6, nsma) |
| |
| # NS is broadcast |
| self.assertEqual(rx[Ether].dst, "ff:ff:ff:ff:ff:ff") |
| |
| # and from the router's MAC |
| self.assertEqual(rx[Ether].src, intf.local_mac) |
| |
| # the rx'd NS should be addressed to an mcast address |
| # derived from the target address |
| self.assertEqual(in6_ptop(rx[IPv6].dst), in6_ptop(dst_ip)) |
| |
| # expect the tgt IP in the NS header |
| ns = rx[ICMPv6ND_NS] |
| self.assertEqual(in6_ptop(ns.tgt), in6_ptop(tgt_ip)) |
| |
| # packet is from the router's local address |
| self.assertEqual(in6_ptop(rx[IPv6].src), intf.local_ip6) |
| |
| # Src link-layer options should have the router's MAC |
| sll = rx[ICMPv6NDOptSrcLLAddr] |
| self.assertEqual(sll.lladdr, intf.local_mac) |
| |
| def send_and_expect_ra(self, intf, pkts, remark, dst_ip=None, |
| filter_out_fn=is_ipv6_misc): |
| intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = intf.get_capture(1, filter_out_fn=filter_out_fn) |
| |
| self.assertEqual(len(rx), 1) |
| rx = rx[0] |
| self.validate_ra(intf, rx, dst_ip) |
| |
| def send_and_expect_na(self, intf, pkts, remark, dst_ip=None, |
| tgt_ip=None, |
| filter_out_fn=is_ipv6_misc): |
| intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = intf.get_capture(1, filter_out_fn=filter_out_fn) |
| |
| self.assertEqual(len(rx), 1) |
| rx = rx[0] |
| self.validate_na(intf, rx, dst_ip, tgt_ip) |
| |
| def send_and_expect_ns(self, tx_intf, rx_intf, pkts, tgt_ip, |
| filter_out_fn=is_ipv6_misc): |
| tx_intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = rx_intf.get_capture(1, filter_out_fn=filter_out_fn) |
| |
| self.assertEqual(len(rx), 1) |
| rx = rx[0] |
| self.validate_ns(rx_intf, rx, tgt_ip) |
| |
| def send_and_assert_no_replies(self, intf, pkts, remark): |
| intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| for i in self.pg_interfaces: |
| i.get_capture(0) |
| i.assert_nothing_captured(remark=remark) |
| |
| def verify_ip(self, rx, smac, dmac, sip, dip): |
| ether = rx[Ether] |
| self.assertEqual(ether.dst, dmac) |
| self.assertEqual(ether.src, smac) |
| |
| ip = rx[IPv6] |
| self.assertEqual(ip.src, sip) |
| self.assertEqual(ip.dst, dip) |
| |
| |
| class TestIPv6(TestIPv6ND): |
| """ IPv6 Test Case """ |
| |
| @classmethod |
| def setUpClass(cls): |
| super(TestIPv6, cls).setUpClass() |
| |
| 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 IPv6 addresses |
| - resolve neighbor address using NDP |
| - 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. |
| |
| *TODO:* Create AD sub interface |
| """ |
| super(TestIPv6, self).setUp() |
| |
| # create 3 pg interfaces |
| self.create_pg_interfaces(range(3)) |
| |
| # create 2 subinterfaces for p1 and pg2 |
| self.sub_interfaces = [ |
| VppDot1QSubint(self, self.pg1, 100), |
| VppDot1QSubint(self, self.pg2, 200) |
| # TODO: 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_ip6() |
| i.resolve_ndp() |
| |
| # config 2M FIB entries |
| self.config_fib_entries(200) |
| |
| def tearDown(self): |
| """Run standard test teardown and log ``show ip6 neighbors``.""" |
| for i in self.sub_interfaces: |
| i.unconfig_ip6() |
| i.ip6_disable() |
| i.admin_down() |
| i.remove_vpp_config() |
| |
| super(TestIPv6, self).tearDown() |
| if not self.vpp_dead: |
| self.logger.info(self.vapi.cli("show ip6 neighbors")) |
| # info(self.vapi.cli("show ip6 fib")) # many entries |
| |
| def config_fib_entries(self, count): |
| """For each interface add to the FIB table *count* routes to |
| "fd02::1/128" 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 = inet_pton(AF_INET6, "fd02::1") |
| dest_addr_len = 128 |
| for i in self.interfaces: |
| next_hop_address = i.local_ip6n |
| for j in range(count / n_int): |
| self.vapi.ip_add_del_route( |
| dest_addr, dest_addr_len, next_hop_address, is_ipv6=1) |
| 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) / |
| IPv6(src=src_if.remote_ip6, dst=dst_if.remote_ip6) / |
| 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[IPv6] |
| 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[IPv6].src) |
| self.assertEqual(ip.dst, saved_packet[IPv6].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): |
| """ IPv6 FIB test |
| |
| Test scenario: |
| - Create IPv6 stream for pg0 interface |
| - Create IPv6 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) |
| |
| def test_ns(self): |
| """ IPv6 Neighbour Solicitation Exceptions |
| |
| Test scenario: |
| - Send an NS Sourced from an address not covered by the link sub-net |
| - Send an NS to an mcast address the router has not joined |
| - Send NS for a target address the router does not onn. |
| """ |
| |
| # |
| # An NS from a non link source address |
| # |
| nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6)) |
| d = inet_ntop(AF_INET6, nsma) |
| |
| p = (Ether(dst=in6_getnsmac(nsma)) / |
| IPv6(dst=d, src="2002::2") / |
| ICMPv6ND_NS(tgt=self.pg0.local_ip6) / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac)) |
| pkts = [p] |
| |
| self.send_and_assert_no_replies( |
| self.pg0, pkts, |
| "No response to NS source by address not on sub-net") |
| |
| # |
| # An NS for sent to a solicited mcast group the router is |
| # not a member of FAILS |
| # |
| if 0: |
| nsma = in6_getnsma(inet_pton(AF_INET6, "fd::ffff")) |
| d = inet_ntop(AF_INET6, nsma) |
| |
| p = (Ether(dst=in6_getnsmac(nsma)) / |
| IPv6(dst=d, src=self.pg0.remote_ip6) / |
| ICMPv6ND_NS(tgt=self.pg0.local_ip6) / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac)) |
| pkts = [p] |
| |
| self.send_and_assert_no_replies( |
| self.pg0, pkts, |
| "No response to NS sent to unjoined mcast address") |
| |
| # |
| # An NS whose target address is one the router does not own |
| # |
| nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6)) |
| d = inet_ntop(AF_INET6, nsma) |
| |
| p = (Ether(dst=in6_getnsmac(nsma)) / |
| IPv6(dst=d, src=self.pg0.remote_ip6) / |
| ICMPv6ND_NS(tgt="fd::ffff") / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac)) |
| pkts = [p] |
| |
| self.send_and_assert_no_replies(self.pg0, pkts, |
| "No response to NS for unknown target") |
| |
| # |
| # A neighbor entry that has no associated FIB-entry |
| # |
| self.pg0.generate_remote_hosts(4) |
| nd_entry = VppNeighbor(self, |
| self.pg0.sw_if_index, |
| self.pg0.remote_hosts[2].mac, |
| self.pg0.remote_hosts[2].ip6, |
| af=AF_INET6, |
| is_no_fib_entry=1) |
| nd_entry.add_vpp_config() |
| |
| # |
| # check we have the neighbor, but no route |
| # |
| self.assertTrue(find_nbr(self, |
| self.pg0.sw_if_index, |
| self.pg0._remote_hosts[2].ip6, |
| inet=AF_INET6)) |
| self.assertFalse(find_route(self, |
| self.pg0._remote_hosts[2].ip6, |
| 128, |
| inet=AF_INET6)) |
| |
| # |
| # send an NS from a link local address to the interface's global |
| # address |
| # |
| p = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) / |
| IPv6(dst=d, src=self.pg0._remote_hosts[2].ip6_ll) / |
| ICMPv6ND_NS(tgt=self.pg0.local_ip6) / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac)) |
| |
| self.send_and_expect_na(self.pg0, p, |
| "NS from link-local", |
| dst_ip=self.pg0._remote_hosts[2].ip6_ll, |
| tgt_ip=self.pg0.local_ip6) |
| |
| # |
| # we should have learned an ND entry for the peer's link-local |
| # but not inserted a route to it in the FIB |
| # |
| self.assertTrue(find_nbr(self, |
| self.pg0.sw_if_index, |
| self.pg0._remote_hosts[2].ip6_ll, |
| inet=AF_INET6)) |
| self.assertFalse(find_route(self, |
| self.pg0._remote_hosts[2].ip6_ll, |
| 128, |
| inet=AF_INET6)) |
| |
| # |
| # An NS to the router's own Link-local |
| # |
| p = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) / |
| IPv6(dst=d, src=self.pg0._remote_hosts[3].ip6_ll) / |
| ICMPv6ND_NS(tgt=self.pg0.local_ip6_ll) / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac)) |
| |
| self.send_and_expect_na(self.pg0, p, |
| "NS to/from link-local", |
| dst_ip=self.pg0._remote_hosts[3].ip6_ll, |
| tgt_ip=self.pg0.local_ip6_ll) |
| |
| # |
| # we should have learned an ND entry for the peer's link-local |
| # but not inserted a route to it in the FIB |
| # |
| self.assertTrue(find_nbr(self, |
| self.pg0.sw_if_index, |
| self.pg0._remote_hosts[3].ip6_ll, |
| inet=AF_INET6)) |
| self.assertFalse(find_route(self, |
| self.pg0._remote_hosts[3].ip6_ll, |
| 128, |
| inet=AF_INET6)) |
| |
| def test_ns_duplicates(self): |
| """ ARP Duplicates""" |
| |
| # |
| # Generate some hosts on the LAN |
| # |
| self.pg1.generate_remote_hosts(3) |
| |
| # |
| # Add host 1 on pg1 and pg2 |
| # |
| ns_pg1 = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].mac, |
| self.pg1.remote_hosts[1].ip6, |
| af=AF_INET6) |
| ns_pg1.add_vpp_config() |
| ns_pg2 = VppNeighbor(self, |
| self.pg2.sw_if_index, |
| self.pg2.remote_mac, |
| self.pg1.remote_hosts[1].ip6, |
| af=AF_INET6) |
| ns_pg2.add_vpp_config() |
| |
| # |
| # IP packet destined for pg1 remote host arrives on pg1 again. |
| # |
| p = (Ether(dst=self.pg0.local_mac, |
| src=self.pg0.remote_mac) / |
| IPv6(src=self.pg0.remote_ip6, |
| dst=self.pg1.remote_hosts[1].ip6) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx1 = self.pg1.get_capture(1) |
| |
| self.verify_ip(rx1[0], |
| self.pg1.local_mac, |
| self.pg1.remote_hosts[1].mac, |
| self.pg0.remote_ip6, |
| self.pg1.remote_hosts[1].ip6) |
| |
| # |
| # remove the duplicate on pg1 |
| # packet stream shoud generate ARPs out of pg1 |
| # |
| ns_pg1.remove_vpp_config() |
| |
| self.send_and_expect_ns(self.pg0, self.pg1, |
| p, self.pg1.remote_hosts[1].ip6) |
| |
| # |
| # Add it back |
| # |
| ns_pg1.add_vpp_config() |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx1 = self.pg1.get_capture(1) |
| |
| self.verify_ip(rx1[0], |
| self.pg1.local_mac, |
| self.pg1.remote_hosts[1].mac, |
| self.pg0.remote_ip6, |
| self.pg1.remote_hosts[1].ip6) |
| |
| def validate_ra(self, intf, rx, dst_ip=None, mtu=9000, pi_opt=None): |
| if not dst_ip: |
| dst_ip = intf.remote_ip6 |
| |
| # unicasted packets must come to the unicast mac |
| self.assertEqual(rx[Ether].dst, intf.remote_mac) |
| |
| # and from the router's MAC |
| self.assertEqual(rx[Ether].src, intf.local_mac) |
| |
| # the rx'd RA should be addressed to the sender's source |
| self.assertTrue(rx.haslayer(ICMPv6ND_RA)) |
| self.assertEqual(in6_ptop(rx[IPv6].dst), |
| in6_ptop(dst_ip)) |
| |
| # and come from the router's link local |
| self.assertTrue(in6_islladdr(rx[IPv6].src)) |
| self.assertEqual(in6_ptop(rx[IPv6].src), |
| in6_ptop(mk_ll_addr(intf.local_mac))) |
| |
| # it should contain the links MTU |
| ra = rx[ICMPv6ND_RA] |
| self.assertEqual(ra[ICMPv6NDOptMTU].mtu, mtu) |
| |
| # it should contain the source's link layer address option |
| sll = ra[ICMPv6NDOptSrcLLAddr] |
| self.assertEqual(sll.lladdr, intf.local_mac) |
| |
| if not pi_opt: |
| # the RA should not contain prefix information |
| self.assertFalse(ra.haslayer(ICMPv6NDOptPrefixInfo)) |
| else: |
| raos = rx.getlayer(ICMPv6NDOptPrefixInfo, 1) |
| |
| # the options are nested in the scapy packet in way that i cannot |
| # decipher how to decode. this 1st layer of option always returns |
| # nested classes, so a direct obj1=obj2 comparison always fails. |
| # however, the getlayer(.., 2) does give one instnace. |
| # so we cheat here and construct a new opt instnace for comparison |
| rd = ICMPv6NDOptPrefixInfo(prefixlen=raos.prefixlen, |
| prefix=raos.prefix, |
| L=raos.L, |
| A=raos.A) |
| if type(pi_opt) is list: |
| for ii in range(len(pi_opt)): |
| self.assertEqual(pi_opt[ii], rd) |
| rd = rx.getlayer(ICMPv6NDOptPrefixInfo, ii+2) |
| else: |
| self.assertEqual(pi_opt, raos) |
| |
| def send_and_expect_ra(self, intf, pkts, remark, dst_ip=None, |
| filter_out_fn=is_ipv6_misc, |
| opt=None): |
| intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = intf.get_capture(1, filter_out_fn=filter_out_fn) |
| |
| self.assertEqual(len(rx), 1) |
| rx = rx[0] |
| self.validate_ra(intf, rx, dst_ip, pi_opt=opt) |
| |
| def test_rs(self): |
| """ IPv6 Router Solicitation Exceptions |
| |
| Test scenario: |
| """ |
| |
| # |
| # Before we begin change the IPv6 RA responses to use the unicast |
| # address - that way we will not confuse them with the periodic |
| # RAs which go to the mcast address |
| # Sit and wait for the first periodic RA. |
| # |
| # TODO |
| # |
| self.pg0.ip6_ra_config(send_unicast=1) |
| |
| # |
| # An RS from a link source address |
| # - expect an RA in return |
| # |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) / |
| ICMPv6ND_RS()) |
| pkts = [p] |
| self.send_and_expect_ra(self.pg0, pkts, "Genuine RS") |
| |
| # |
| # For the next RS sent the RA should be rate limited |
| # |
| self.send_and_assert_no_replies(self.pg0, pkts, "RA rate limited") |
| |
| # |
| # When we reconfiure the IPv6 RA config, we reset the RA rate limiting, |
| # so we need to do this before each test below so as not to drop |
| # packets for rate limiting reasons. Test this works here. |
| # |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, pkts, "Rate limit reset RS") |
| |
| # |
| # An RS sent from a non-link local source |
| # |
| self.pg0.ip6_ra_config(send_unicast=1) |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IPv6(dst=self.pg0.local_ip6, src="2002::ffff") / |
| ICMPv6ND_RS()) |
| pkts = [p] |
| self.send_and_assert_no_replies(self.pg0, pkts, |
| "RS from non-link source") |
| |
| # |
| # Source an RS from a link local address |
| # |
| self.pg0.ip6_ra_config(send_unicast=1) |
| ll = mk_ll_addr(self.pg0.remote_mac) |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IPv6(dst=self.pg0.local_ip6, src=ll) / |
| ICMPv6ND_RS()) |
| pkts = [p] |
| self.send_and_expect_ra(self.pg0, pkts, |
| "RS sourced from link-local", |
| dst_ip=ll) |
| |
| # |
| # Send the RS multicast |
| # |
| self.pg0.ip6_ra_config(send_unicast=1) |
| dmac = in6_getnsmac(inet_pton(AF_INET6, "ff02::2")) |
| ll = mk_ll_addr(self.pg0.remote_mac) |
| p = (Ether(dst=dmac, src=self.pg0.remote_mac) / |
| IPv6(dst="ff02::2", src=ll) / |
| ICMPv6ND_RS()) |
| pkts = [p] |
| self.send_and_expect_ra(self.pg0, pkts, |
| "RS sourced from link-local", |
| dst_ip=ll) |
| |
| # |
| # Source from the unspecified address ::. This happens when the RS |
| # is sent before the host has a configured address/sub-net, |
| # i.e. auto-config. Since the sender has no IP address, the reply |
| # comes back mcast - so the capture needs to not filter this. |
| # If we happen to pick up the periodic RA at this point then so be it, |
| # it's not an error. |
| # |
| self.pg0.ip6_ra_config(send_unicast=1, suppress=1) |
| p = (Ether(dst=dmac, src=self.pg0.remote_mac) / |
| IPv6(dst="ff02::2", src="::") / |
| ICMPv6ND_RS()) |
| pkts = [p] |
| self.send_and_expect_ra(self.pg0, pkts, |
| "RS sourced from unspecified", |
| dst_ip="ff02::1", |
| filter_out_fn=None) |
| |
| # |
| # Configure The RA to announce the links prefix |
| # |
| self.pg0.ip6_ra_prefix(self.pg0.local_ip6n, |
| self.pg0.local_ip6_prefix_len) |
| |
| # |
| # RAs should now contain the prefix information option |
| # |
| opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len, |
| prefix=self.pg0.local_ip6, |
| L=1, |
| A=1) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| ll = mk_ll_addr(self.pg0.remote_mac) |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IPv6(dst=self.pg0.local_ip6, src=ll) / |
| ICMPv6ND_RS()) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with prefix-info", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Change the prefix info to not off-link |
| # L-flag is clear |
| # |
| self.pg0.ip6_ra_prefix(self.pg0.local_ip6n, |
| self.pg0.local_ip6_prefix_len, |
| off_link=1) |
| |
| opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len, |
| prefix=self.pg0.local_ip6, |
| L=0, |
| A=1) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with Prefix info with L-flag=0", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Change the prefix info to not off-link, no-autoconfig |
| # L and A flag are clear in the advert |
| # |
| self.pg0.ip6_ra_prefix(self.pg0.local_ip6n, |
| self.pg0.local_ip6_prefix_len, |
| off_link=1, |
| no_autoconfig=1) |
| |
| opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len, |
| prefix=self.pg0.local_ip6, |
| L=0, |
| A=0) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with Prefix info with A & L-flag=0", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Change the flag settings back to the defaults |
| # L and A flag are set in the advert |
| # |
| self.pg0.ip6_ra_prefix(self.pg0.local_ip6n, |
| self.pg0.local_ip6_prefix_len) |
| |
| opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len, |
| prefix=self.pg0.local_ip6, |
| L=1, |
| A=1) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with Prefix info", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Change the prefix info to not off-link, no-autoconfig |
| # L and A flag are clear in the advert |
| # |
| self.pg0.ip6_ra_prefix(self.pg0.local_ip6n, |
| self.pg0.local_ip6_prefix_len, |
| off_link=1, |
| no_autoconfig=1) |
| |
| opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len, |
| prefix=self.pg0.local_ip6, |
| L=0, |
| A=0) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with Prefix info with A & L-flag=0", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Use the reset to defults option to revert to defaults |
| # L and A flag are clear in the advert |
| # |
| self.pg0.ip6_ra_prefix(self.pg0.local_ip6n, |
| self.pg0.local_ip6_prefix_len, |
| use_default=1) |
| |
| opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len, |
| prefix=self.pg0.local_ip6, |
| L=1, |
| A=1) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with Prefix reverted to defaults", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Advertise Another prefix. With no L-flag/A-flag |
| # |
| self.pg0.ip6_ra_prefix(self.pg1.local_ip6n, |
| self.pg1.local_ip6_prefix_len, |
| off_link=1, |
| no_autoconfig=1) |
| |
| opt = [ICMPv6NDOptPrefixInfo(prefixlen=self.pg0.local_ip6_prefix_len, |
| prefix=self.pg0.local_ip6, |
| L=1, |
| A=1), |
| ICMPv6NDOptPrefixInfo(prefixlen=self.pg1.local_ip6_prefix_len, |
| prefix=self.pg1.local_ip6, |
| L=0, |
| A=0)] |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| ll = mk_ll_addr(self.pg0.remote_mac) |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IPv6(dst=self.pg0.local_ip6, src=ll) / |
| ICMPv6ND_RS()) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with multiple Prefix infos", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Remove the first refix-info - expect the second is still in the |
| # advert |
| # |
| self.pg0.ip6_ra_prefix(self.pg0.local_ip6n, |
| self.pg0.local_ip6_prefix_len, |
| is_no=1) |
| |
| opt = ICMPv6NDOptPrefixInfo(prefixlen=self.pg1.local_ip6_prefix_len, |
| prefix=self.pg1.local_ip6, |
| L=0, |
| A=0) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with Prefix reverted to defaults", |
| dst_ip=ll, |
| opt=opt) |
| |
| # |
| # Remove the second prefix-info - expect no prefix-info i nthe adverts |
| # |
| self.pg0.ip6_ra_prefix(self.pg1.local_ip6n, |
| self.pg1.local_ip6_prefix_len, |
| is_no=1) |
| |
| self.pg0.ip6_ra_config(send_unicast=1) |
| self.send_and_expect_ra(self.pg0, p, |
| "RA with Prefix reverted to defaults", |
| dst_ip=ll) |
| |
| # |
| # Reset the periodic advertisements back to default values |
| # |
| self.pg0.ip6_ra_config(no=1, suppress=1, send_unicast=0) |
| |
| |
| class IPv6NDProxyTest(TestIPv6ND): |
| """ IPv6 ND ProxyTest Case """ |
| |
| def setUp(self): |
| super(IPv6NDProxyTest, self).setUp() |
| |
| # create 3 pg interfaces |
| self.create_pg_interfaces(range(3)) |
| |
| # pg0 is the master interface, with the configured subnet |
| self.pg0.admin_up() |
| self.pg0.config_ip6() |
| self.pg0.resolve_ndp() |
| |
| self.pg1.ip6_enable() |
| self.pg2.ip6_enable() |
| |
| def tearDown(self): |
| super(IPv6NDProxyTest, self).tearDown() |
| |
| def test_nd_proxy(self): |
| """ IPv6 Proxy ND """ |
| |
| # |
| # Generate some hosts in the subnet that we are proxying |
| # |
| self.pg0.generate_remote_hosts(8) |
| |
| nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6)) |
| d = inet_ntop(AF_INET6, nsma) |
| |
| # |
| # Send an NS for one of those remote hosts on one of the proxy links |
| # expect no response since it's from an address that is not |
| # on the link that has the prefix configured |
| # |
| ns_pg1 = (Ether(dst=in6_getnsmac(nsma), src=self.pg1.remote_mac) / |
| IPv6(dst=d, src=self.pg0._remote_hosts[2].ip6) / |
| ICMPv6ND_NS(tgt=self.pg0.local_ip6) / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0._remote_hosts[2].mac)) |
| |
| self.send_and_assert_no_replies(self.pg1, ns_pg1, "Off link NS") |
| |
| # |
| # Add proxy support for the host |
| # |
| self.vapi.ip6_nd_proxy( |
| inet_pton(AF_INET6, self.pg0._remote_hosts[2].ip6), |
| self.pg1.sw_if_index) |
| |
| # |
| # try that NS again. this time we expect an NA back |
| # |
| self.send_and_expect_na(self.pg1, ns_pg1, |
| "NS to proxy entry", |
| dst_ip=self.pg0._remote_hosts[2].ip6, |
| tgt_ip=self.pg0.local_ip6) |
| |
| # |
| # ... and that we have an entry in the ND cache |
| # |
| self.assertTrue(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg0._remote_hosts[2].ip6, |
| inet=AF_INET6)) |
| |
| # |
| # ... and we can route traffic to it |
| # |
| t = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IPv6(dst=self.pg0._remote_hosts[2].ip6, |
| src=self.pg0.remote_ip6) / |
| UDP(sport=10000, dport=20000) / |
| Raw('\xa5' * 100)) |
| |
| self.pg0.add_stream(t) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| rx = rx[0] |
| |
| self.assertEqual(rx[Ether].dst, self.pg0._remote_hosts[2].mac) |
| self.assertEqual(rx[Ether].src, self.pg1.local_mac) |
| |
| self.assertEqual(rx[IPv6].src, t[IPv6].src) |
| self.assertEqual(rx[IPv6].dst, t[IPv6].dst) |
| |
| # |
| # Test we proxy for the host on the main interface |
| # |
| ns_pg0 = (Ether(dst=in6_getnsmac(nsma), src=self.pg0.remote_mac) / |
| IPv6(dst=d, src=self.pg0.remote_ip6) / |
| ICMPv6ND_NS(tgt=self.pg0._remote_hosts[2].ip6) / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac)) |
| |
| self.send_and_expect_na(self.pg0, ns_pg0, |
| "NS to proxy entry on main", |
| tgt_ip=self.pg0._remote_hosts[2].ip6, |
| dst_ip=self.pg0.remote_ip6) |
| |
| # |
| # Setup and resolve proxy for another host on another interface |
| # |
| ns_pg2 = (Ether(dst=in6_getnsmac(nsma), src=self.pg2.remote_mac) / |
| IPv6(dst=d, src=self.pg0._remote_hosts[3].ip6) / |
| ICMPv6ND_NS(tgt=self.pg0.local_ip6) / |
| ICMPv6NDOptSrcLLAddr(lladdr=self.pg0._remote_hosts[2].mac)) |
| |
| self.vapi.ip6_nd_proxy( |
| inet_pton(AF_INET6, self.pg0._remote_hosts[3].ip6), |
| self.pg2.sw_if_index) |
| |
| self.send_and_expect_na(self.pg2, ns_pg2, |
| "NS to proxy entry other interface", |
| dst_ip=self.pg0._remote_hosts[3].ip6, |
| tgt_ip=self.pg0.local_ip6) |
| |
| self.assertTrue(find_nbr(self, |
| self.pg2.sw_if_index, |
| self.pg0._remote_hosts[3].ip6, |
| inet=AF_INET6)) |
| |
| # |
| # hosts can communicate. pg2->pg1 |
| # |
| t2 = (Ether(dst=self.pg2.local_mac, |
| src=self.pg0.remote_hosts[3].mac) / |
| IPv6(dst=self.pg0._remote_hosts[2].ip6, |
| src=self.pg0._remote_hosts[3].ip6) / |
| UDP(sport=10000, dport=20000) / |
| Raw('\xa5' * 100)) |
| |
| self.pg2.add_stream(t2) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| rx = rx[0] |
| |
| self.assertEqual(rx[Ether].dst, self.pg0._remote_hosts[2].mac) |
| self.assertEqual(rx[Ether].src, self.pg1.local_mac) |
| |
| self.assertEqual(rx[IPv6].src, t2[IPv6].src) |
| self.assertEqual(rx[IPv6].dst, t2[IPv6].dst) |
| |
| # |
| # remove the proxy configs |
| # |
| self.vapi.ip6_nd_proxy( |
| inet_pton(AF_INET6, self.pg0._remote_hosts[2].ip6), |
| self.pg1.sw_if_index, |
| is_del=1) |
| self.vapi.ip6_nd_proxy( |
| inet_pton(AF_INET6, self.pg0._remote_hosts[3].ip6), |
| self.pg2.sw_if_index, |
| is_del=1) |
| |
| self.assertFalse(find_nbr(self, |
| self.pg2.sw_if_index, |
| self.pg0._remote_hosts[3].ip6, |
| inet=AF_INET6)) |
| self.assertFalse(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg0._remote_hosts[2].ip6, |
| inet=AF_INET6)) |
| |
| # |
| # no longer proxy-ing... |
| # |
| self.send_and_assert_no_replies(self.pg0, ns_pg0, "Proxy unconfigured") |
| self.send_and_assert_no_replies(self.pg1, ns_pg1, "Proxy unconfigured") |
| self.send_and_assert_no_replies(self.pg2, ns_pg2, "Proxy unconfigured") |
| |
| # |
| # no longer forwarding. traffic generates NS out of the glean/main |
| # interface |
| # |
| self.pg2.add_stream(t2) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg0.get_capture(1) |
| |
| self.assertTrue(rx[0].haslayer(ICMPv6ND_NS)) |
| |
| |
| class TestIPNull(VppTestCase): |
| """ IPv6 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_ip6() |
| i.resolve_ndp() |
| |
| def tearDown(self): |
| super(TestIPNull, self).tearDown() |
| for i in self.pg_interfaces: |
| i.unconfig_ip6() |
| i.admin_down() |
| |
| def test_ip_null(self): |
| """ IP NULL route """ |
| |
| p = (Ether(src=self.pg0.remote_mac, |
| dst=self.pg0.local_mac) / |
| IPv6(src=self.pg0.remote_ip6, dst="2001::1") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| # |
| # A route via IP NULL that will reply with ICMP unreachables |
| # |
| ip_unreach = VppIpRoute(self, "2001::", 64, [], is_unreach=1, is_ip6=1) |
| ip_unreach.add_vpp_config() |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg0.get_capture(1) |
| rx = rx[0] |
| icmp = rx[ICMPv6DestUnreach] |
| |
| # 0 = "No route to destination" |
| self.assertEqual(icmp.code, 0) |
| |
| # ICMP is rate limited. pause a bit |
| self.sleep(1) |
| |
| # |
| # A route via IP NULL that will reply with ICMP prohibited |
| # |
| ip_prohibit = VppIpRoute(self, "2001::1", 128, [], |
| is_prohibit=1, is_ip6=1) |
| ip_prohibit.add_vpp_config() |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg0.get_capture(1) |
| rx = rx[0] |
| icmp = rx[ICMPv6DestUnreach] |
| |
| # 1 = "Communication with destination administratively prohibited" |
| self.assertEqual(icmp.code, 1) |
| |
| |
| class TestIPDisabled(VppTestCase): |
| """ IPv6 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_ip6() |
| self.pg0.resolve_ndp() |
| |
| # 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 send_and_assert_no_replies(self, intf, pkts, remark): |
| intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| for i in self.pg_interfaces: |
| i.get_capture(0) |
| i.assert_nothing_captured(remark=remark) |
| |
| def test_ip_disabled(self): |
| """ IP Disabled """ |
| |
| # |
| # An (S,G). |
| # one accepting interface, pg0, 2 forwarding interfaces |
| # |
| route_ff_01 = VppIpMRoute( |
| self, |
| "::", |
| "ffef::1", 128, |
| 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)], |
| is_ip6=1) |
| route_ff_01.add_vpp_config() |
| |
| pu = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IPv6(src="2001::1", dst=self.pg0.remote_ip6) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pm = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IPv6(src="2001::1", dst="ffef::1") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| # |
| # PG1 does not forward IP traffic |
| # |
| self.send_and_assert_no_replies(self.pg1, pu, "IPv6 disabled") |
| self.send_and_assert_no_replies(self.pg1, pm, "IPv6 disabled") |
| |
| # |
| # IP enable PG1 |
| # |
| self.pg1.config_ip6() |
| |
| # |
| # 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_ip6() |
| |
| # |
| # PG1 does not forward IP traffic |
| # |
| self.send_and_assert_no_replies(self.pg1, pu, "IPv6 disabled") |
| self.send_and_assert_no_replies(self.pg1, pm, "IPv6 disabled") |
| |
| |
| class TestIP6LoadBalance(VppTestCase): |
| """ IPv6 Load-Balancing """ |
| |
| def setUp(self): |
| super(TestIP6LoadBalance, self).setUp() |
| |
| self.create_pg_interfaces(range(5)) |
| |
| for i in self.pg_interfaces: |
| i.admin_up() |
| i.config_ip6() |
| i.resolve_ndp() |
| i.enable_mpls() |
| |
| def tearDown(self): |
| super(TestIP6LoadBalance, self).tearDown() |
| for i in self.pg_interfaces: |
| i.unconfig_ip6() |
| i.admin_down() |
| i.disable_mpls() |
| |
| 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_ip6_load_balance(self): |
| """ IPv6 Load-Balancing """ |
| |
| # |
| # An array of packets that differ only in the destination port |
| # - IP only |
| # - MPLS EOS |
| # - MPLS non-EOS |
| # - MPLS non-EOS with an entropy label |
| # |
| port_ip_pkts = [] |
| port_mpls_pkts = [] |
| port_mpls_neos_pkts = [] |
| port_ent_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 = (IPv6(dst="3000::1", src="3000:1::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)) |
| port_mpls_neos_pkts.append((Ether(src=self.pg0.remote_mac, |
| dst=self.pg0.local_mac) / |
| MPLS(label=67, ttl=2) / |
| MPLS(label=77, ttl=2) / |
| port_ip_hdr)) |
| port_ent_pkts.append((Ether(src=self.pg0.remote_mac, |
| dst=self.pg0.local_mac) / |
| MPLS(label=67, ttl=2) / |
| MPLS(label=14, ttl=2) / |
| MPLS(label=999, ttl=2) / |
| port_ip_hdr)) |
| src_ip_hdr = (IPv6(dst="3000::1", src="3000:1::%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)) |
| |
| # |
| # A route for the IP pacekts |
| # |
| route_3000_1 = VppIpRoute(self, "3000::1", 128, |
| [VppRoutePath(self.pg1.remote_ip6, |
| self.pg1.sw_if_index, |
| is_ip6=1), |
| VppRoutePath(self.pg2.remote_ip6, |
| self.pg2.sw_if_index, |
| is_ip6=1)], |
| is_ip6=1) |
| route_3000_1.add_vpp_config() |
| |
| # |
| # a local-label for the EOS packets |
| # |
| binding = VppMplsIpBind(self, 66, "3000::1", 128, is_ip6=1) |
| binding.add_vpp_config() |
| |
| # |
| # An MPLS route for the non-EOS packets |
| # |
| route_67 = VppMplsRoute(self, 67, 0, |
| [VppRoutePath(self.pg1.remote_ip6, |
| self.pg1.sw_if_index, |
| labels=[67], |
| is_ip6=1), |
| VppRoutePath(self.pg2.remote_ip6, |
| self.pg2.sw_if_index, |
| labels=[67], |
| is_ip6=1)]) |
| route_67.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]) |
| self.send_and_expect_load_balancing(self.pg0, port_mpls_neos_pkts, |
| [self.pg1, self.pg2]) |
| |
| # |
| # The packets with Entropy label in should not load-balance, |
| # since the Entorpy value is fixed. |
| # |
| self.send_and_expect_one_itf(self.pg0, port_ent_pkts, self.pg1) |
| |
| # |
| # 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, is_ip6=1, 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, is_ip6=1, 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) / |
| IPv6(dst="4000::1", src="4000:1::1") / |
| UDP(sport=1234, dport=1234 + ii) / |
| Raw('\xa5' * 100))) |
| src_pkts.append((Ether(src=self.pg0.remote_mac, |
| dst=self.pg0.local_mac) / |
| IPv6(dst="4000::1", src="4000:1::%d" % ii) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100))) |
| |
| route_3000_2 = VppIpRoute(self, "3000::2", 128, |
| [VppRoutePath(self.pg3.remote_ip6, |
| self.pg3.sw_if_index, |
| is_ip6=1), |
| VppRoutePath(self.pg4.remote_ip6, |
| self.pg4.sw_if_index, |
| is_ip6=1)], |
| is_ip6=1) |
| route_3000_2.add_vpp_config() |
| |
| route_4000_1 = VppIpRoute(self, "4000::1", 128, |
| [VppRoutePath("3000::1", |
| 0xffffffff, |
| is_ip6=1), |
| VppRoutePath("3000::2", |
| 0xffffffff, |
| is_ip6=1)], |
| is_ip6=1) |
| route_4000_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]) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |