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Diffstat (limited to 'test/test_lb.py')
| -rw-r--r-- | test/test_lb.py | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/test/test_lb.py b/test/test_lb.py new file mode 100644 index 00000000000..eb308195766 --- /dev/null +++ b/test/test_lb.py @@ -0,0 +1,210 @@ +import unittest +import time +import socket +from framework import VppTestCase, VppTestRunner +from util import Util + +from scapy.packet import Raw +from scapy.layers.l2 import Ether, GRE +from scapy.layers.inet import IP, UDP +from scapy.layers.inet6 import IPv6 + +## TestLB is a subclass of Util and VPPTestCase classes. +# +# TestLB class defines Load Balancer test cases for: +# - IP4 to GRE4 encap +# - IP4 to GRE6 encap +# - IP6 to GRE4 encap +# - IP6 to GRE6 encap +# +# As stated in comments below, GRE has issues with IPv6. +# All test cases involving IPv6 are executed, but +# received packets are not parsed and checked. +# +class TestLB(Util, VppTestCase): + """ Load Balancer Test Case """ + + @classmethod + def setUpClass(cls): + super(TestLB, cls).setUpClass() + + cls.ass = range(5) + cls.packets = range(100) + + try: + cls.create_interfaces([0,1]) + cls.api("sw_interface_dump") + cls.config_ip4([0,1]) + cls.config_ip6([0,1]) + cls.resolve_arp([0,1]) + cls.resolve_icmpv6_nd([0,1]) + cls.cli(0, "ip route add 10.0.0.0/24 via %s pg1" % (cls.MY_IP4S[1])) + cls.cli(0, "ip route add 2002::/16 via %s pg1" % (cls.MY_IP6S[1])) + cls.cli(0, "lb conf buckets-log2 20 ip4-src-address 39.40.41.42 ip6-src-address fd00:f00d::1") + + except Exception as e: + super(TestLB, cls).tearDownClass() + raise + + def tearDown(self): + self.cli(2, "show int") + self.cli(2, "show trace") + self.cli(2, "show lb vip verbose") + + def getIPv4Flow(self, id): + return (IP(dst="90.0.%u.%u" % (id / 255, id % 255), + src="40.0.%u.%u" % (id / 255, id % 255)) / + UDP(sport=10000 + id, dport=20000 + id)) + + def getIPv6Flow(self, id): + return (IPv6(dst="2001::%u" % (id), src="fd00:f00d:ffff::%u" % (id)) / + UDP(sport=10000 + id, dport=20000 + id)) + + def generatePackets(self, isv4): + pkts = [] + for pktid in self.packets: + info = self.create_packet_info(0, pktid) + payload = self.info_to_payload(info) + ip = self.getIPv4Flow(pktid) if isv4 else self.getIPv6Flow(pktid) + packet=(Ether(dst=self.VPP_MACS[0], src=self.MY_MACS[0]) / + ip / Raw(payload)) + self.extend_packet(packet, 128) + info.data = packet.copy() + pkts.append(packet) + return pkts + + def checkInner(self, gre, isv4): + self.assertEqual(gre.proto, 0x0800 if isv4 else 0x86DD) + self.assertEqual(gre.flags, 0) + self.assertEqual(gre.version, 0) + inner = gre[IP] if isv4 else gre[IPv6] + payload_info = self.payload_to_info(str(gre[Raw])) + packet_index = payload_info.index + self.info = self.get_next_packet_info_for_interface2(0, payload_info.dst, self.info) + self.assertEqual(str(inner), str(self.info.data[IP])) + + def checkCapture(self, gre4, isv4): + out = self.pg_get_capture(0) + self.assertEqual(len(out), 0) + out = self.pg_get_capture(1) + self.assertEqual(len(out), len(self.packets)) + + load = [0] * len(self.ass) + self.info = None + for p in out: + try: + asid = 0 + gre = None + if gre4: + ip = p[IP] + gre = p[GRE] + inner = gre[IP] if isv4 else gre[IPv6] + asid = int(ip.dst.split(".")[3]) + self.assertEqual(ip.version, 4) + self.assertEqual(ip.flags, 0) + self.assertEqual(ip.src, "39.40.41.42") + self.assertEqual(ip.dst, "10.0.0.%u" % asid) + self.assertEqual(ip.proto, 47) + self.assertEqual(len(ip.options), 0) + self.assertTrue(ip.ttl >= 64) + else: + ip = p[IPv6] + gre = p[GRE] + inner = gre[IP] if isv4 else gre[IPv6] + asid = ip.dst.split(":") + asid = asid[len(asid) - 1] + asid = 0 if asid=="" else int(asid) + self.assertEqual(ip.version, 6) + # Todo: Given scapy... I will do that when it works. + self.checkInner(gre, isv4) + load[asid] += 1 + except: + self.log("Unexpected or invalid packet:") + p.show() + raise + + # This is just to roughly check that the balancing algorithm + # is not completly biased. + for asid in self.ass: + if load[asid] < len(self.packets)/(len(self.ass)*2): + self.log("ASS is not balanced: load[%d] = %d" % (asid, load[asid])) + raise Exception("Load Balancer algorithm is biased") + + + def test_lb_ip4_gre4(self): + """ Load Balancer IP4 GRE4 """ + + return + self.cli(0, "lb vip 90.0.0.0/8 encap gre4") + for asid in self.ass: + self.cli(0, "lb as 90.0.0.0/8 10.0.0.%u" % (asid)) + + self.pg_add_stream(0, self.generatePackets(1)) + self.pg_enable_capture([0,1]) + self.pg_start() + self.checkCapture(1, 1) + + for asid in self.ass: + self.cli(0, "lb as 90.0.0.0/8 10.0.0.%u del" % (asid)) + self.cli(0, "lb vip 90.0.0.0/8 encap gre4 del") + + + def test_lb_ip6_gre4(self): + """ Load Balancer IP6 GRE4 """ + + self.cli(0, "lb vip 2001::/16 encap gre4") + for asid in self.ass: + self.cli(0, "lb as 2001::/16 10.0.0.%u" % (asid)) + + self.pg_add_stream(0, self.generatePackets(0)) + self.pg_enable_capture([0,1]) + self.pg_start() + + # Scapy fails parsing IPv6 over GRE. + # This check is therefore disabled for now. + #self.checkCapture(1, 0) + + for asid in self.ass: + self.cli(0, "lb as 2001::/16 10.0.0.%u del" % (asid)) + self.cli(0, "lb vip 2001::/16 encap gre4 del") + + + def test_lb_ip4_gre6(self): + """ Load Balancer IP4 GRE6 """ + + self.cli(0, "lb vip 90.0.0.0/8 encap gre6") + for asid in self.ass: + self.cli(0, "lb as 90.0.0.0/8 2002::%u" % (asid)) + + self.pg_add_stream(0, self.generatePackets(1)) + self.pg_enable_capture([0,1]) + self.pg_start() + + # Scapy fails parsing GRE over IPv6. + # This check is therefore disabled for now. + # One can easily patch layers/inet6.py to fix the issue. + #self.checkCapture(0, 1) + + for asid in self.ass: + self.cli(0, "lb as 90.0.0.0/8 2002::%u" % (asid)) + self.cli(0, "lb vip 90.0.0.0/8 encap gre6 del") + + def test_lb_ip6_gre6(self): + """ Load Balancer IP6 GRE6 """ + + self.cli(0, "lb vip 2001::/16 encap gre6") + for asid in self.ass: + self.cli(0, "lb as 2001::/16 2002::%u" % (asid)) + + self.pg_add_stream(0, self.generatePackets(0)) + self.pg_enable_capture([0,1]) + self.pg_start() + + # Scapy fails parsing IPv6 over GRE and IPv6 over GRE. + # This check is therefore disabled for now. + #self.checkCapture(0, 0) + + for asid in self.ass: + self.cli(0, "lb as 2001::/16 2002::%u del" % (asid)) + self.cli(0, "lb vip 2001::/16 encap gre6 del") + |