#!/usr/bin/env python3 """GSO functional tests""" # # Add tests for: # - GSO # - Verify that sending Jumbo frame without GSO enabled correctly # - Verify that sending Jumbo frame with GSO enabled correctly # - Verify that sending Jumbo frame with GSO enabled only on ingress interface # import unittest from scapy.packet import Raw from scapy.layers.inet6 import IPv6, Ether, IP, UDP, ICMPv6PacketTooBig from scapy.layers.inet import TCP, ICMP from scapy.layers.vxlan import VXLAN from scapy.data import ETH_P_IP, ETH_P_IPV6, ETH_P_ARP from framework import VppTestCase, VppTestRunner from vpp_object import VppObject from vpp_interface import VppInterface from vpp_ip import DpoProto from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathProto from socket import AF_INET, AF_INET6, inet_pton from util import reassemble4 """ Test_gso is a subclass of VPPTestCase classes. GSO tests. """ class TestGSO(VppTestCase): """ GSO Test Case """ def __init__(self, *args): VppTestCase.__init__(self, *args) @classmethod def setUpClass(self): super(TestGSO, self).setUpClass() @classmethod def tearDownClass(self): super(TestGSO, self).tearDownClass() def setUp(self): super(TestGSO, self).setUp() def tearDown(self): super(TestGSO, self).tearDown() if not self.vpp_dead: for i in self.pg_interfaces: i.unconfig_ip4() i.unconfig_ip6() i.admin_down() def test_gso(self): """ GSO test """ # # Send jumbo frame with gso disabled and DF bit is set # self.create_pg_interfaces(range(2)) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.config_ip6() i.disable_ipv6_ra() i.resolve_arp() i.resolve_ndp() p4 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, flags='DF') / TCP(sport=1234, dport=1234) / Raw(b'\xa5' * 65200)) rxs = self.send_and_expect(self.pg0, [p4], self.pg0) for rx in rxs: self.assertEqual(rx[Ether].src, self.pg0.local_mac) self.assertEqual(rx[Ether].dst, self.pg0.remote_mac) self.assertEqual(rx[IP].src, self.pg0.local_ip4) self.assertEqual(rx[IP].dst, self.pg0.remote_ip4) self.assertEqual(rx[ICMP].type, 3) # "dest-unreach" self.assertEqual(rx[ICMP].code, 4) # "fragmentation-needed" # # Send jumbo frame with gso enabled and DF bit is set # input and output interfaces support GSO # self.create_pg_interfaces(range(2, 4), 1, 1460) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.config_ip6() i.disable_ipv6_ra() i.resolve_arp() i.resolve_ndp() p41 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) / IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4, flags='DF') / TCP(sport=1234, dport=1234) / Raw(b'\xa5' * 65200)) rxs = self.send_and_expect(self.pg2, [p41], self.pg3) for rx in rxs: self.assertEqual(rx[Ether].src, self.pg3.local_mac) self.assertEqual(rx[Ether].dst, self.pg3.remote_mac) self.assertEqual(rx[IP].src, self.pg2.remote_ip4) self.assertEqual(rx[IP].dst, self.pg3.remote_ip4) self.assertEqual(rx[IP].len, 65240) # 65200 + 20 (IP) + 20 (TCP) self.assertEqual(rx[TCP].sport, 1234) self.assertEqual(rx[TCP].dport, 1234) # # Send jumbo frame with gso enabled only on input interface # and DF bit is set. GSO packet will be chunked into gso_size # data payload # self.create_pg_interfaces(range(4, 5)) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.config_ip6() i.disable_ipv6_ra() i.resolve_arp() i.resolve_ndp() self.vapi.feature_gso_enable_disable(self.pg4.sw_if_index) p42 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) / IP(src=self.pg2.remote_ip4, dst=self.pg4.remote_ip4, flags='DF') / TCP(sport=1234, dport=1234) / Raw(b'\xa5' * 65200)) rxs = self.send_and_expect(self.pg2, [p42], self.pg4, 45) size = 0 for rx in rxs: self.assertEqual(rx[Ether].src, self.pg4.local_mac) self.assertEqual(rx[Ether].dst, self.pg4.remote_mac) self.assertEqual(rx[IP].src, self.pg2.remote_ip4) self.assertEqual(rx[IP].dst, self.pg4.remote_ip4) self.assertEqual(rx[TCP].sport, 1234) self.assertEqual(rx[TCP].dport, 1234) size = rxs[44][TCP].seq + rxs[44][IP].len - 20 - 20 self.assertEqual(size, 65200) # # Send jumbo frame with gso enabled only on input interface # and DF bit is unset. GSO packet will be fragmented. # self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [576, 0, 0, 0]) p43 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) / IP(src=self.pg2.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=1234, dport=1234) / Raw(b'\xa5' * 65200)) rxs = self.send_and_expect(self.pg2, [p43], self.pg1, 119) size = 0 for rx in rxs: self.assertEqual(rx[Ether].src, self.pg1.local_mac) self.assertEqual(rx[Ether].dst, self.pg1.remote_mac) self.assertEqual(rx[IP].src, self.pg2.remote_ip4) self.assertEqual(rx[IP].dst, self.pg1.remote_ip4) size += rx[IP].len - 20 size -= 20 # TCP header self.assertEqual(size, 65200) # # Send jumbo frame with gso enabled only on input interface with 9K MTU # and DF bit is unset. GSO packet will be fragmented. GSO size will be # 8960. # self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [9000, 0, 0, 0]) self.create_pg_interfaces(range(5, 6), 1, 8960) for i in self.pg_interfaces: i.admin_up() i.config_ip4() i.config_ip6() i.disable_ipv6_ra() i.resolve_arp() i.resolve_ndp() self.vapi.sw_interface_set_mtu(self.pg5.sw_if_index, [9000, 0, 0, 0]) self.vapi.feature_gso_enable_disable(self.pg1.sw_if_index) p44 = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=1234, dport=1234) / Raw(b'\xa5' * 65200)) self.pg1.enable_capture() rxs = self.send_and_expect(self.pg5, [p44], self.pg1, 33) size = 0 for rx in rxs: self.assertEqual(rx[Ether].src, self.pg1.local_mac) self.assertEqual(rx[Ether].dst, self.pg1.remote_mac) self.assertEqual(rx[IP].src, self.pg5.remote_ip4) self.assertEqual(rx[IP].dst, self.pg1.remote_ip4) size = rxs[32][TCP].seq + rxs[32][IP].len - 20 - 20 self.assertEqual(size, 65200) if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)