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authorPavel Kotucek <pkotucek@cisco.com>2016-11-04 09:58:01 +0100
committerDamjan Marion <dmarion.lists@gmail.com>2016-11-15 17:49:14 +0000
commitf6e3dc4778ef910d4ae6114783bd8f50887e6d0d (patch)
tree0782a31c7c5e6d16c349278744264e90875245fa /test/test_span.py
parent7c8eda16d4bc10bf779200b23369e2ee12843dc1 (diff)
span: add feature (rx only) (VPP-185)
Change-Id: I0f7cbf06b5a5acd745d13c9f5c761ea18132107b Signed-off-by: marek <mazavods@gmail.com> Signed-off-by: Damjan Marion <damarion@cisco.com> Signed-off-by: Pavel Kotucek <pkotucek@cisco.com> Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'test/test_span.py')
-rw-r--r--test/test_span.py186
1 files changed, 186 insertions, 0 deletions
diff --git a/test/test_span.py b/test/test_span.py
new file mode 100644
index 00000000000..59ef5efc864
--- /dev/null
+++ b/test/test_span.py
@@ -0,0 +1,186 @@
+#!/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)