diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/test_ip6.py | 237 | ||||
| -rw-r--r-- | test/vpp_interface.py | 14 | ||||
| -rw-r--r-- | test/vpp_papi_provider.py | 16 | ||||
| -rw-r--r-- | test/vpp_pg_interface.py | 5 |
4 files changed, 269 insertions, 3 deletions
diff --git a/test/test_ip6.py b/test/test_ip6.py index e8b12f68..cd9c4b95 100644 --- a/test/test_ip6.py +++ b/test/test_ip6.py @@ -8,8 +8,18 @@ from vpp_sub_interface import VppSubInterface, VppDot1QSubint 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 +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): @@ -76,6 +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")) @@ -206,6 +222,225 @@ 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 Soliciatation Exceptions + + Test sceanrio: + - 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 send_and_expect_ra(self, intf, pkts, remark, src_ip=None): + if not src_ip: + src_ip = intf.remote_ip6 + intf.add_stream(pkts) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + rx = intf.get_capture(1) + + self.assertEqual(len(rx), 1) + rx = rx[0] + + # 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(src_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 test_rs(self): + """ IPv6 Router Soliciatation Exceptions + + Test sceanrio: + """ + + # + # 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 + # + 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", src_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) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IPv6(dst=self.pg0.local_ip6, src="::") / + ICMPv6ND_RS()) + pkts = [p] + + self.pg0.add_stream(pkts) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1, filter_out_fn=None) + found = 0 + for rx in capture: + if (rx.haslayer(ICMPv6ND_RA)): + # 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(self.pg0.local_mac))) + # sent to the all hosts mcast + self.assertEqual(in6_ptop(rx[IPv6].dst), "ff02::1") + + found = 1 + self.assertTrue(found) + + @unittest.skip("Unsupported") + def test_mrs(self): + """ IPv6 Multicast Router Soliciatation Exceptions + + Test sceanrio: + """ + + # + # An RS from a link source address + # - expect an RA in return + # + nsma = in6_getnsma(inet_pton(socket.AF_INET6, self.pg0.local_ip6)) + d = inet_ntop(socket.AF_INET6, nsma) + + p = (Ether(dst=getmacbyip6("ff02::2")) / + IPv6(dst=d, src=self.pg0.remote_ip6) / + ICMPv6MRD_Solicitation()) + pkts = [p] + + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.assert_nothing_captured( + remark="No response to NS source by address not on sub-net") + + # + # An RS 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=getmacbyip6("ff02::2")) / + IPv6(dst=d, src="2002::2") / + ICMPv6MRD_Solicitation()) + pkts = [p] + + self.send_and_assert_no_replies(self.pg0, pkts, + "RA rate limited") + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.assert_nothing_captured( + remark="No response to NS source by address not on sub-net") + if __name__ == '__main__': unittest.main(testRunner=VppTestRunner) diff --git a/test/vpp_interface.py b/test/vpp_interface.py index 6ccb92bb..856a5cc2 100644 --- a/test/vpp_interface.py +++ b/test/vpp_interface.py @@ -249,6 +249,12 @@ class VppInterface(object): """Configure IPv6 RA suppress on the VPP interface.""" self.test.vapi.sw_interface_ra_suppress(self.sw_if_index) + def ip6_ra_config(self, suppress=0, send_unicast=0): + """Configure IPv6 RA suppress on the VPP interface.""" + self.test.vapi.ip6_sw_interface_ra_config(self.sw_if_index, + suppress, + send_unicast) + def admin_up(self): """Put interface ADMIN-UP.""" self.test.vapi.sw_interface_set_flags(self.sw_if_index, admin_up_down=1) @@ -257,6 +263,14 @@ class VppInterface(object): """Put interface ADMIN-down.""" self.test.vapi.sw_interface_set_flags(self.sw_if_index, admin_up_down=0) + def ip6_enable(self): + """IPv6 Enable interface""" + self.test.vapi.ip6_sw_interface_enable_disable(self.sw_if_index, enable=1) + + def ip6_disable(self): + """Put interface ADMIN-DOWN.""" + self.test.vapi.ip6_sw_interface_enable_disable(self.sw_if_index, enable=0) + def add_sub_if(self, sub_if): """Register a sub-interface with this interface. diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py index db530d98..0e4c0cdb 100644 --- a/test/vpp_papi_provider.py +++ b/test/vpp_papi_provider.py @@ -219,6 +219,22 @@ class VppPapiProvider(object): return self.api(self.papi.sw_interface_ip6nd_ra_config, {'sw_if_index': sw_if_index}) + def ip6_sw_interface_ra_config(self, sw_if_index, + suppress, + send_unicast,): + return self.api(self.papi.sw_interface_ip6nd_ra_config, + {'sw_if_index': sw_if_index, + 'suppress' : suppress, + 'send_unicast' : send_unicast}) + + def ip6_sw_interface_enable_disable(self, sw_if_index, enable): + """ + Enable/Disable An interface for IPv6 + """ + return self.api(self.papi.sw_interface_ip6_enable_disable, + {'sw_if_index': sw_if_index, + 'enable': enable}) + def vxlan_add_del_tunnel( self, src_addr, diff --git a/test/vpp_pg_interface.py b/test/vpp_pg_interface.py index aef0052e..b5929a4b 100644 --- a/test/vpp_pg_interface.py +++ b/test/vpp_pg_interface.py @@ -10,13 +10,14 @@ from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6ND_NA,\ ICMPv6NDOptSrcLLAddr, ICMPv6NDOptDstLLAddr, ICMPv6ND_RA, RouterAlert, \ IPv6ExtHdrHopByHop from util import ppp, ppc -from scapy.utils6 import in6_getnsma, in6_getnsmac +from scapy.utils6 import in6_getnsma, in6_getnsmac, in6_ismaddr from scapy.utils import inet_pton, inet_ntop def is_ipv6_misc(p): """ Is packet one of uninteresting IPv6 broadcasts? """ if p.haslayer(ICMPv6ND_RA): - return True + if in6_ismaddr(p[IPv6].dst): + return True if p.haslayer(IPv6ExtHdrHopByHop): for o in p[IPv6ExtHdrHopByHop].options: if isinstance(o, RouterAlert): |