#!/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)