import unittest
import socket
-from logging import *
from framework import VppTestCase, VppTestRunner
-from vpp_sub_interface import VppSubInterface, VppDot1QSubint, VppDot1ADSubint
+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 ICMPv6ND_NS, IPv6, UDP
+from scapy.layers.inet6 import IPv6, UDP, ICMPv6ND_NS, ICMPv6ND_RS, \
+ ICMPv6ND_RA, ICMPv6NDOptSrcLLAddr, getmacbyip6, ICMPv6MRD_Solicitation, \
+ ICMPv6NDOptMTU, ICMPv6NDOptSrcLLAddr, ICMPv6NDOptPrefixInfo
+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):
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
# create 2 subinterfaces for p1 and pg2
self.sub_interfaces = [
VppDot1QSubint(self, self.pg1, 100),
- VppDot1QSubint(self, self.pg2, 200)]
+ 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()
i.config_ip6()
i.resolve_ndp()
- # config 2M FIB enries
+ # 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:
- info(self.vapi.cli("show ip6 neighbors"))
+ 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
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 = counter + 1
+ counter += 1
if counter / count * 100 > percent:
- info("Configure %d FIB entries .. %d%% done" %
- (count, percent))
- percent = percent + 1
+ 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.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) /
return pkts
def verify_capture(self, dst_if, capture):
- info("Verifying capture on interface %s" % dst_if.name)
+ """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
payload_info = self.payload_to_info(str(packet[Raw]))
packet_index = payload_info.index
self.assertEqual(payload_info.dst, dst_sw_if_index)
- 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])
self.assertEqual(udp.sport, saved_packet[UDP].sport)
self.assertEqual(udp.dport, saved_packet[UDP].dport)
except:
- error("Unexpected or invalid packet:")
- 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 """
+ """ 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)
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, 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(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)
+
+ #
+ # 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)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff