| #!/usr/bin/env python |
| |
| import unittest |
| import random |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether |
| from scapy.layers.inet import IP, UDP |
| from logging import * |
| |
| from framework import VppTestCase, VppTestRunner |
| from util import Host |
| |
| |
| class TestSpan(VppTestCase): |
| """ SPAN Test Case """ |
| |
| # Test variables |
| hosts_nr = 10 # Number of hosts |
| pkts_per_burst = 257 # Number of packets per burst |
| |
| @classmethod |
| def setUpClass(cls): |
| super(TestSpan, cls).setUpClass() |
| |
| def setUp(self): |
| super(TestSpan, self).setUp() |
| |
| # create 3 pg interfaces |
| self.create_pg_interfaces(range(3)) |
| |
| # packet flows mapping pg0 -> pg1, pg2 -> pg3, etc. |
| self.flows = dict() |
| self.flows[self.pg0] = [self.pg1] |
| |
| # packet sizes |
| self.pg_if_packet_sizes = [64, 512] #, 1518, 9018] |
| |
| self.interfaces = list(self.pg_interfaces) |
| |
| # Create host MAC and IPv4 lists |
| # self.MY_MACS = dict() |
| # self.MY_IP4S = dict() |
| self.create_host_lists(TestSpan.hosts_nr) |
| |
| # Create bi-directional cross-connects between pg0 and pg1 |
| self.vapi.sw_interface_set_l2_xconnect( |
| self.pg0.sw_if_index, self.pg1.sw_if_index, enable=1) |
| self.vapi.sw_interface_set_l2_xconnect( |
| self.pg1.sw_if_index, self.pg0.sw_if_index, enable=1) |
| |
| # setup all interfaces |
| for i in self.interfaces: |
| i.admin_up() |
| i.config_ip4() |
| i.resolve_arp() |
| |
| # Enable SPAN on pg0 (mirrored to pg2) |
| self.vapi.sw_interface_span_enable_disable(self.pg0.sw_if_index, self.pg2.sw_if_index) |
| |
| def tearDown(self): |
| super(TestSpan, self).tearDown() |
| |
| def create_host_lists(self, count): |
| """ Method to create required number of MAC and IPv4 addresses. |
| Create required number of host MAC addresses and distribute them among |
| interfaces. Create host IPv4 address for every host MAC address too. |
| |
| :param count: Number of hosts to create MAC and IPv4 addresses for. |
| """ |
| # mapping between packet-generator index and lists of test hosts |
| self.hosts_by_pg_idx = dict() |
| |
| for pg_if in self.pg_interfaces: |
| # self.MY_MACS[i.sw_if_index] = [] |
| # self.MY_IP4S[i.sw_if_index] = [] |
| self.hosts_by_pg_idx[pg_if.sw_if_index] = [] |
| hosts = self.hosts_by_pg_idx[pg_if.sw_if_index] |
| for j in range(0, count): |
| host = Host( |
| "00:00:00:ff:%02x:%02x" % (pg_if.sw_if_index, j), |
| "172.17.1%02x.%u" % (pg_if.sw_if_index, j)) |
| hosts.append(host) |
| |
| def create_stream(self, src_if, packet_sizes): |
| pkts = [] |
| for i in range(0, TestSpan.pkts_per_burst): |
| dst_if = self.flows[src_if][0] |
| dst_host = random.choice(self.hosts_by_pg_idx[dst_if.sw_if_index]) |
| src_host = random.choice(self.hosts_by_pg_idx[src_if.sw_if_index]) |
| pkt_info = self.create_packet_info( |
| src_if.sw_if_index, dst_if.sw_if_index) |
| payload = self.info_to_payload(pkt_info) |
| p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / |
| IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw(payload)) |
| pkt_info.data = p.copy() |
| size = packet_sizes[(i / 2) % len(packet_sizes)] |
| self.extend_packet(p, size) |
| pkts.append(p) |
| return pkts |
| |
| def verify_capture(self, dst_if, capture_pg1, capture_pg2): |
| last_info = dict() |
| for i in self.interfaces: |
| last_info[i.sw_if_index] = None |
| dst_sw_if_index = dst_if.sw_if_index |
| if len(capture_pg1) != len(capture_pg2): |
| error("Diffrent number of outgoing and mirrored packets : %u != %u" |
| % (len(capture_pg1), len(capture_pg2))) |
| raise |
| for pkt_pg1, pkt_pg2 in zip(capture_pg1, capture_pg2): |
| try: |
| ip1 = pkt_pg1[IP] |
| udp1 = pkt_pg1[UDP] |
| raw1 = pkt_pg1[Raw] |
| |
| if pkt_pg1[Ether] != pkt_pg2[Ether]: |
| error("Diffrent ethernet header of outgoing and mirrored packet") |
| raise |
| if ip1 != pkt_pg2[IP]: |
| error("Diffrent ip header of outgoing and mirrored packet") |
| raise |
| if udp1 != pkt_pg2[UDP]: |
| error("Diffrent udp header of outgoing and mirrored packet") |
| raise |
| if raw1 != pkt_pg2[Raw]: |
| error("Diffrent raw data of outgoing and mirrored packet") |
| raise |
| |
| payload_info = self.payload_to_info(str(raw1)) |
| 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)) |
| next_info = self.get_next_packet_info_for_interface2( |
| payload_info.src, dst_sw_if_index, |
| last_info[payload_info.src]) |
| last_info[payload_info.src] = next_info |
| self.assertTrue(next_info is not None) |
| self.assertEqual(packet_index, next_info.index) |
| saved_packet = next_info.data |
| # Check standard fields |
| self.assertEqual(ip1.src, saved_packet[IP].src) |
| self.assertEqual(ip1.dst, saved_packet[IP].dst) |
| self.assertEqual(udp1.sport, saved_packet[UDP].sport) |
| self.assertEqual(udp1.dport, saved_packet[UDP].dport) |
| except: |
| error("Unexpected or invalid packet:") |
| pkt_pg1.show() |
| pkt_pg2.show() |
| raise |
| for i in self.interfaces: |
| remaining_packet = self.get_next_packet_info_for_interface2( |
| i, dst_sw_if_index, last_info[i.sw_if_index]) |
| self.assertTrue(remaining_packet is None, |
| "Port %u: Packet expected from source %u didn't" |
| " arrive" % (dst_sw_if_index, i.sw_if_index)) |
| |
| def test_span(self): |
| """ SPAN test |
| |
| Test scenario: |
| 1. config |
| 3 interfaces, pg0 l2xconnected with pg1 |
| 2. sending l2 eth packets between 2 interfaces (pg0, pg1) and mirrored to pg2 |
| 64B, 512B, 1518B, 9018B (ether_size) |
| burst of packets per interface |
| """ |
| |
| # Create incoming packet streams for packet-generator interfaces |
| pkts = self.create_stream(self.pg0, self.pg_if_packet_sizes) |
| self.pg0.add_stream(pkts) |
| |
| # Enable packet capturing and start packet sending |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| # Verify packets outgoing packet streams on mirrored interface (pg2) |
| info("Verifying capture on interfaces %s and %s" % (self.pg1.name, self.pg2.name)) |
| self.verify_capture(self.pg1, self.pg1.get_capture(), self.pg2.get_capture()) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |