X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=test%2Ftest_ip6.py;h=e188970ac108709e79ccd11b56da71399c7b2182;hb=5fae99c184e09342aed888d4d7790b533513209f;hp=bff829b7015a891ac6e867d9ccb9f0a1a7fcaccf;hpb=86d87c40dd97ced69c939299204fadf1859a2f50;p=vpp.git diff --git a/test/test_ip6.py b/test/test_ip6.py index bff829b7015..e188970ac10 100644 --- a/test/test_ip6.py +++ b/test/test_ip6.py @@ -5,10 +5,21 @@ import socket from framework import VppTestCase, VppTestRunner from vpp_sub_interface import VppSubInterface, VppDot1QSubint +from vpp_pg_interface import is_ipv6_misc from scapy.packet import Raw from scapy.layers.l2 import Ether, Dot1Q -from scapy.layers.inet6 import IPv6, UDP +from scapy.layers.inet6 import IPv6, UDP, ICMPv6ND_NS, ICMPv6ND_RS, \ + ICMPv6ND_RA, ICMPv6NDOptSrcLLAddr, getmacbyip6, ICMPv6MRD_Solicitation +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 + +def mk_ll_addr(mac): + euid = in6_mactoifaceid(mac) + addr = "fe80::" + euid + return addr class TestIPv6(VppTestCase): @@ -75,6 +86,12 @@ class TestIPv6(VppTestCase): 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")) @@ -103,7 +120,7 @@ class TestIPv6(VppTestCase): counter += 1 if counter / count * 100 > percent: self.logger.info("Configure %d FIB entries .. %d%% done" % - (count, percent)) + (count, percent)) percent += 1 def create_stream(self, src_if, packet_sizes): @@ -115,8 +132,7 @@ class TestIPv6(VppTestCase): pkts = [] for i in range(0, 257): dst_if = self.flows[src_if][i % 2] - info = self.create_packet_info( - src_if.sw_if_index, dst_if.sw_if_index) + 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) / @@ -156,8 +172,9 @@ class TestIPv6(VppTestCase): 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)) + 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]) @@ -171,16 +188,14 @@ class TestIPv6(VppTestCase): self.assertEqual(udp.sport, saved_packet[UDP].sport) self.assertEqual(udp.dport, saved_packet[UDP].dport) except: - self.logger.error("Unexpected or invalid packet:") - self.logger.error(packet.show()) + 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)) + 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 @@ -208,6 +223,202 @@ class TestIPv6(VppTestCase): pkts = i.parent.get_capture() self.verify_capture(i, pkts) + def send_and_assert_no_replies(self, intf, pkts, remark): + intf.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + intf.assert_nothing_captured(remark=remark) + + 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(socket.AF_INET6, self.pg0.local_ip6)) + d = inet_ntop(socket.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(socket.AF_INET6, "fd::ffff")) + d = inet_ntop(socket.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(socket.AF_INET6, self.pg0.local_ip6)) + d = inet_ntop(socket.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") + + 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 send_and_expect_ra(self, intf, pkts, remark, dst_ip=None, + filter_out_fn=is_ipv6_misc): + intf.add_stream(pkts) + self.pg0.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 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(socket.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) + + # + # Reset the periodic advertisements back to default values + # + self.pg0.ip6_ra_config(no=1, suppress=1, send_unicast=0) if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)