097fa66b98
Enhance the route add/del APIs to take a set of paths rather than just one.
Most unicast routing protocols calcualte all the available paths in one
run of the algorithm so updating all the paths at once is beneficial for the client.
two knobs control the behaviour:
is_multipath - if set the the set of paths passed will be added to those
that already exist, otherwise the set will replace them.
is_add - add or remove the set
is_add=0, is_multipath=1 and an empty set, results in deleting the route.
It is also considerably faster to add multiple paths at once, than one at a time:
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.11
100000 routes in .572240 secs, 174751.80 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.12
100000 routes in .528383 secs, 189256.54 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.13
100000 routes in .757131 secs, 132077.52 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.14
100000 routes in .878317 secs, 113854.12 routes/sec
vat# ip_route_add_del 1.1.1.1/32 count 100000 multipath via 10.10.10.11 via 10.10.10.12 via 10.10.10.13 via 10.10.10.14
100000 routes in .900212 secs, 111084.93 routes/sec
Change-Id: I416b93f7684745099c1adb0b33edac58c9339c1a
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Signed-off-by: Ole Troan <ot@cisco.com>
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
200 lines
6.2 KiB
Python
200 lines
6.2 KiB
Python
#!/usr/bin/env python
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"""IP4 and IP6 MTU functional tests"""
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#
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# Add tests for:
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# - sub interfaces
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# - Verify that adjacencies inherit MTU correctly
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# - Verify that sub-interfaces inherit MTU correctly
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# - Different types of interfaces?
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#
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import unittest
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from scapy.layers.inet6 import IPv6, Ether, IP, UDP, ICMPv6PacketTooBig
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from scapy.layers.inet import ICMP
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from framework import VppTestCase, VppTestRunner
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from vpp_ip import DpoProto
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from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathProto
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from socket import AF_INET, AF_INET6, inet_pton
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from util import reassemble4
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""" Test_mtu is a subclass of VPPTestCase classes.
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MTU tests.
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"""
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class TestMTU(VppTestCase):
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""" MTU Test Case """
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maxDiff = None
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@classmethod
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def setUpClass(cls):
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super(TestMTU, cls).setUpClass()
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cls.create_pg_interfaces(range(2))
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cls.interfaces = list(cls.pg_interfaces)
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@classmethod
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def tearDownClass(cls):
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super(TestMTU, cls).tearDownClass()
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def setUp(self):
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super(TestMTU, self).setUp()
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for i in self.interfaces:
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i.admin_up()
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i.config_ip4()
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i.config_ip6()
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i.disable_ipv6_ra()
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i.resolve_arp()
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i.resolve_ndp()
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def tearDown(self):
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super(TestMTU, self).tearDown()
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if not self.vpp_dead:
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for i in self.pg_interfaces:
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i.unconfig_ip4()
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i.unconfig_ip6()
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i.admin_down()
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def validate(self, rx, expected):
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self.assertEqual(rx, expected.__class__(expected))
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def validate_bytes(self, rx, expected):
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self.assertEqual(rx, expected)
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def payload(self, len):
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return 'x' * len
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def get_mtu(self, sw_if_index):
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rv = self.vapi.sw_interface_dump(sw_if_index=sw_if_index)
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for i in rv:
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if i.sw_if_index == sw_if_index:
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return i.mtu[0]
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return 0
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def test_ip4_mtu(self):
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""" IP4 MTU test """
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p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
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p_ip4 = IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4,
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flags='DF')
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current_mtu = self.get_mtu(self.pg1.sw_if_index)
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p_payload = UDP(sport=1234, dport=1234) / self.payload(
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current_mtu - 20 - 8)
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p4 = p_ether / p_ip4 / p_payload
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p4_reply = p_ip4 / p_payload
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p4_reply.ttl -= 1
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rx = self.send_and_expect(self.pg0, p4*11, self.pg1)
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for p in rx:
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self.validate(p[1], p4_reply)
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# MTU
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self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [576, 0, 0, 0])
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self.assertEqual(576, self.get_mtu(self.pg1.sw_if_index))
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# Should fail. Too large MTU
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p_icmp4 = ICMP(type='dest-unreach', code='fragmentation-needed',
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nexthopmtu=576, chksum=0x2dbb)
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icmp4_reply = (IP(src=self.pg0.local_ip4,
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dst=self.pg0.remote_ip4,
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ttl=254, len=576, id=0) /
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p_icmp4 / p_ip4 / p_payload)
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icmp4_reply[1].ttl -= 1
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n = icmp4_reply.__class__(icmp4_reply)
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s = bytes(icmp4_reply)
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icmp4_reply = s[0:576]
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rx = self.send_and_expect(self.pg0, p4*11, self.pg0)
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for p in rx:
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# p.show2()
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# n.show2()
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self.validate_bytes(bytes(p[1]), icmp4_reply)
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# Now with DF off. Expect fragments.
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# First go with 1500 byte packets.
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p_payload = UDP(sport=1234, dport=1234) / self.payload(
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1500 - 20 - 8)
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p4 = p_ether / p_ip4 / p_payload
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p4.flags = 0
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p4_reply = p_ip4 / p_payload
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p4_reply.ttl = 62 # check this
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p4_reply.flags = 0
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p4_reply.id = 256
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self.pg_enable_capture()
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self.pg0.add_stream(p4*1)
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self.pg_start()
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rx = self.pg1.get_capture(3)
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reass_pkt = reassemble4(rx)
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self.validate(reass_pkt, p4_reply)
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'''
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# Now what happens with a 9K frame
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p_payload = UDP(sport=1234, dport=1234) / self.payload(
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current_mtu - 20 - 8)
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p4 = p_ether / p_ip4 / p_payload
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p4.flags = 0
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p4_reply = p_ip4 / p_payload
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p4_reply.ttl = 62 # check this
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p4_reply.flags = 0
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p4_reply.id = 512
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self.pg_enable_capture()
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self.pg0.add_stream(p4*1)
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self.pg_start()
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rx = self.pg1.get_capture(16)
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reass_pkt = reassemble4(rx)
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reass_pkt.show2()
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p4_reply.show2()
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self.validate(reass_pkt, p4_reply)
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'''
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# Reset MTU
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self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
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[current_mtu, 0, 0, 0])
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def test_ip6_mtu(self):
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""" IP6 MTU test """
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current_mtu = self.get_mtu(self.pg1.sw_if_index)
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p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
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p_ip6 = IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6)
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p_payload = UDP(sport=1234, dport=1234) / self.payload(
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current_mtu - 40 - 8)
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p6 = p_ether / p_ip6 / p_payload
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p6_reply = p_ip6 / p_payload
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p6_reply.hlim -= 1
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rx = self.send_and_expect(self.pg0, p6*9, self.pg1)
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for p in rx:
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self.validate(p[1], p6_reply)
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# MTU (only checked on encap)
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self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [1280, 0, 0, 0])
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self.assertEqual(1280, self.get_mtu(self.pg1.sw_if_index))
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# Should fail. Too large MTU
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p_icmp6 = ICMPv6PacketTooBig(mtu=1280, cksum=0x4c7a)
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icmp6_reply = (IPv6(src=self.pg0.local_ip6,
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dst=self.pg0.remote_ip6,
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hlim=255, plen=1240) /
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p_icmp6 / p_ip6 / p_payload)
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icmp6_reply[2].hlim -= 1
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n = icmp6_reply.__class__(icmp6_reply)
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s = bytes(icmp6_reply)
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icmp6_reply_str = s[0:1280]
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rx = self.send_and_expect(self.pg0, p6*9, self.pg0)
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for p in rx:
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self.validate_bytes(bytes(p[1]), icmp6_reply_str)
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# Reset MTU
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self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
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[current_mtu, 0, 0, 0])
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if __name__ == '__main__':
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unittest.main(testRunner=VppTestRunner)
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