diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/test_flowperpkt.py | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/test/test_flowperpkt.py b/test/test_flowperpkt.py new file mode 100644 index 00000000000..af68a69e09b --- /dev/null +++ b/test/test_flowperpkt.py @@ -0,0 +1,222 @@ +#!/usr/bin/env python + +import unittest +import socket +import binascii +import time + +from framework import VppTestCase, VppTestRunner + +from scapy.packet import Raw +from scapy.layers.l2 import Ether +from scapy.layers.inet import IP, UDP +from scapy.utils import hexdump +from util import ppp + +class TestFlowperpkt(VppTestCase): + """ Flow-per-packet plugin: test both L2 and IP4 reporting """ + + def setUp(self): + """ + Set up + + **Config:** + - create three PG interfaces + - create a couple of loopback interfaces + """ + super(TestFlowperpkt, self).setUp() + + self.create_pg_interfaces(range(3)) + + self.pg_if_packet_sizes = [150] + + self.interfaces = list(self.pg_interfaces) + + for intf in self.interfaces: + intf.admin_up() + intf.config_ip4() + intf.resolve_arp() + + def tearDown(self): + """Run standard test teardown""" + super(TestFlowperpkt, self).tearDown() + + + def create_stream(self, src_if, dst_if, packet_sizes): + """Create a packet stream to tickle the plugin + + :param VppInterface src_if: Source interface for packet stream + :param VppInterface src_if: Dst interface for packet stream + :param list packet_sizes: Sizes to test + """ + pkts = [] + for size in packet_sizes: + info = self.create_packet_info(src_if.sw_if_index, + dst_if.sw_if_index) + payload = self.info_to_payload(info) + p = (Ether(src=src_if.local_mac, dst=dst_if.remote_mac) / + IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) / + UDP(sport=1234, dport=4321) / + Raw(payload)) + info.data = p.copy() + self.extend_packet(p, size) + pkts.append(p) + return pkts + + def verify_ipfix(self, collector_if): + """Check the ipfix capture""" + found_data_packet = 0 + found_template_packet = 0 + found_l2_data_packet = 0 + found_l2_template_packet = 0 + + # Scapy, of course, understands ipfix not at all... + # These data vetted by manual inspection in wireshark + # X'ed out fields are timestamps, which will absolutely + # fail to compare. At L2, kill the pg src MAC address, which + # is random. + + data_udp_string = "1283128300370000000a002fXXXXXXXX00000000000000010100001f0000000100000002ac100102ac10020200XXXXXXXXXXXXXXXX0092" + + template_udp_string = "12831283003c0000000a0034XXXXXXXX00000002000000010002002401000007000a0004000e000400080004000c000400050001009c000801380002" + + l2_data_udp_string = "12831283003c0000000a0034XXXXXXXX0000000100000001010100240000000100000002XXXXXXXXXXXX02020000ff020008XXXXXXXXXXXXXXXX0092" + + l2_template_udp_string = "12831283003c0000000a0034XXXXXXXX00000002000000010002002401010007000a0004000e0004003800060050000601000002009c000801380002" + + cap_x = "X" + data_udp_len = len(data_udp_string) + template_udp_len = len(template_udp_string) + l2_data_udp_len = len(l2_data_udp_string) + l2_template_udp_len = len(l2_template_udp_string) + + self.logger.info("Look for ipfix packets on %s sw_if_index %d " + % (collector_if.name, collector_if.sw_if_index)) + capture = collector_if.get_capture() + + for p in capture: + data_result = "" + template_result = "" + l2_data_result = "" + l2_template_result = "" + unmasked_result = "" + ip = p[IP] + udp = p[UDP] + self.logger.info("src %s dst %s" % (ip.src, ip.dst)) + self.logger.info(" udp src_port %s dst_port %s" + % (udp.sport, udp.dport)) + + # Hex-dump the UDP datagram 4 ways in parallel + # X'ing out incomparable fields + # Python completely bites at this sort of thing, of course + + x = str(udp) + l = len(x) + i = 0 + while i < l: + # If current index within range + if i < data_udp_len/2: + # See if we're supposed to don't care the data + if ord(data_udp_string[i*2]) == ord(cap_x[0]): + data_result = data_result + "XX" + else: + data_result = data_result + ("%02x" % ord(x[i])) + else: + # index out of range, emit actual data + # The test will fail, but it may help debug, etc. + data_result = data_result + ("%02x" % ord(x[i])) + + if i < template_udp_len/2: + if ord(template_udp_string[i*2]) == ord(cap_x[0]): + template_result = template_result + "XX" + else: + template_result = template_result + ("%02x" % ord(x[i])) + else: + template_result = template_result + ("%02x" % ord(x[i])) + + if i < l2_data_udp_len/2: + # See if we're supposed to don't care the data + if ord(l2_data_udp_string[i*2]) == ord(cap_x[0]): + l2_data_result = l2_data_result + "XX" + else: + l2_data_result = l2_data_result + ("%02x" % ord(x[i])) + else: + # index out of range, emit actual data + # The test will fail, but it may help debug, etc. + l2_data_result = l2_data_result + ("%02x" % ord(x[i])) + + if i < l2_template_udp_len/2: + if ord(l2_template_udp_string[i*2]) == ord(cap_x[0]): + l2_template_result = l2_template_result + "XX" + else: + l2_template_result = l2_template_result + ("%02x" % ord(x[i])) + else: + l2_template_result = l2_template_result + ("%02x" % ord(x[i])) + # In case we need to + unmasked_result = unmasked_result + ("%02x" % ord(x[i])) + + i = i + 1 + + if data_result == data_udp_string: + self.logger.info ("found ip4 data packet") + found_data_packet = 1 + elif template_result == template_udp_string: + self.logger.info ("found ip4 template packet") + found_template_packet = 1 + elif l2_data_result == l2_data_udp_string: + self.logger.info ("found l2 data packet") + found_l2_data_packet = 1 + elif l2_template_result == l2_template_udp_string: + self.logger.info ("found l2 template packet") + found_l2_template_packet = 1 + else: + self.logger.info ("unknown pkt '%s'" % unmasked_result) + + self.assertTrue (found_data_packet == 1) + self.assertTrue (found_template_packet == 1) + self.assertTrue (found_l2_data_packet == 1) + self.assertTrue (found_l2_template_packet == 1) + + def test_L3_fpp(self): + """ Flow per packet L3 test """ + + # Configure an ipfix report on the [nonexistent] collector + # 172.16.3.2, as if it was connected to the pg2 interface + # Install a FIB entry, so the exporter's work won't turn into + # an ARP request + + self.pg_enable_capture(self.pg_interfaces) + self.vapi.cli("set ip arp pg2 172.16.3.2 dead.beef.0002") + self.logger.info(self.vapi.cli("set ipfix exporter collector 172.16.3.2 src 172.16.3.1 path-mtu 1450 template-interval 1")) + + # Export flow records for all pkts transmitted on pg1 + + self.logger.info(self.vapi.cli("flowperpkt feature add-del pg1")) + self.logger.info(self.vapi.cli("flowperpkt feature add-del pg1 l2")) + + # Arrange to minimally trace generated ipfix packets + self.logger.info(self.vapi.cli("trace add flowperpkt-ipv4 10")) + self.logger.info(self.vapi.cli("trace add flowperpkt-l2 10")) + + # Create a stream from pg0 -> pg1, which causes + # an ipfix packet to be transmitted on pg2 + + pkts = self.create_stream(self.pg0, self.pg1, + self.pg_if_packet_sizes) + self.pg0.add_stream(pkts) + self.pg_start() + + # Flush the ipfix collector, so we don't need any + # asinine time.sleep(5) action + + self.logger.info(self.vapi.cli("ipfix flush")) + + # Make sure the 4 pkts we expect actually showed up + self.verify_ipfix(self.pg2) + +if __name__ == '__main__': + unittest.main(testRunner=VppTestRunner) + + + + |