-#!/usr/bin/env python
-## @package framework
-# Module to handle test case execution.
-#
-# The module provides a set of tools for constructing and running tests and
-# representing the results.
+#!/usr/bin/env python3
+from __future__ import print_function
import logging
-logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
-
-import os
import sys
+import os
+import select
+import signal
import subprocess
import unittest
-from inspect import getdoc
-
-from scapy.utils import wrpcap, rdpcap
-from scapy.packet import Raw
-
-## Static variables to store color formatting strings.
-#
-# These variables (RED, GREEN, YELLOW and LPURPLE) are used to configure
-# the color of the text to be printed in the terminal. Variable END is used
-# to revert the text color to the default one.
-if hasattr(sys.stdout, 'isatty') and sys.stdout.isatty():
- RED = '\033[91m'
- GREEN = '\033[92m'
- YELLOW = '\033[93m'
- LPURPLE = '\033[94m'
- END = '\033[0m'
-else:
- RED = ''
- GREEN = ''
- YELLOW = ''
- LPURPLE = ''
- END = ''
-
-
-## Private class to create packet info object.
-#
-# Help process information about the next packet.
-# Set variables to default values.
+import re
+import time
+import faulthandler
+import random
+import copy
+import platform
+import shutil
+from collections import deque
+from threading import Thread, Event
+from inspect import getdoc, isclass
+from traceback import format_exception
+from logging import FileHandler, DEBUG, Formatter
+from enum import Enum
+from abc import ABC, abstractmethod
+from struct import pack, unpack
+
+import scapy.compat
+from scapy.packet import Raw, Packet
+from vpp_pg_interface import VppPGInterface
+from vpp_sub_interface import VppSubInterface
+from vpp_lo_interface import VppLoInterface
+from vpp_bvi_interface import VppBviInterface
+from vpp_papi_provider import VppPapiProvider
+from vpp_papi import VppEnum
+import vpp_papi
+from vpp_object import VppObjectRegistry
+from util import ppp, is_core_present
+from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
+from scapy.layers.inet6 import ICMPv6DestUnreach, ICMPv6EchoRequest
+from scapy.layers.inet6 import ICMPv6EchoReply
+from vpp_running import use_running
+from asfframework import VppAsfTestCase
+
+
+"""
+ Packet Generator / Scapy Test framework module.
+
+ The module provides a set of tools for constructing and running tests and
+ representing the results.
+"""
+
+
class _PacketInfo(object):
+ """Private class to create packet info object.
+
+ Help process information about the next packet.
+ Set variables to default values.
+ """
+
+ #: Store the index of the packet.
index = -1
+ #: Store the index of the source packet generator interface of the packet.
src = -1
+ #: Store the index of the destination packet generator interface
+ #: of the packet.
dst = -1
+ #: Store expected ip version
+ ip = -1
+ #: Store expected upper protocol
+ proto = -1
+ #: Store the copy of the former packet.
data = None
- ## @var index
- # Integer variable to store the index of the packet.
- ## @var src
- # Integer variable to store the index of the source packet generator
- # interface of the packet.
- ## @var dst
- # Integer variable to store the index of the destination packet generator
- # interface of the packet.
- ## @var data
- # Object variable to store the copy of the former packet.
-
-## Subclass of the python unittest.TestCase class.
-#
-# This subclass is a base class for test cases that are implemented as classes.
-# It provides methods to create and run test case.
-class VppTestCase(unittest.TestCase):
-
- ## Class method to set class constants necessary to run test case.
- # @param cls The class pointer.
+
+ def __eq__(self, other):
+ index = self.index == other.index
+ src = self.src == other.src
+ dst = self.dst == other.dst
+ data = self.data == other.data
+ return index and src and dst and data
+
+
+@use_running
+class VppTestCase(VppAsfTestCase):
+ """This subclass is a base class for VPP test cases that are implemented as
+ classes. It provides methods to create and run test case.
+ """
+
+ @property
+ def packet_infos(self):
+ """List of packet infos"""
+ return self._packet_infos
+
@classmethod
- def setUpConstants(cls):
- cls.vpp_bin = os.getenv('VPP_TEST_BIN', "vpp")
- cls.plugin_path = os.getenv('VPP_TEST_PLUGIN_PATH')
- cls.vpp_api_test_bin = os.getenv("VPP_TEST_API_TEST_BIN",
- "vpp-api-test")
- cls.vpp_cmdline = [cls.vpp_bin, "unix", "nodaemon", "api-segment", "{",
- "prefix", "unittest", "}"]
- if cls.plugin_path is not None:
- cls.vpp_cmdline.extend(["plugin_path", cls.plugin_path])
-
- cls.vpp_api_test_cmdline = [cls.vpp_api_test_bin, "chroot", "prefix",
- "unittest"]
- try:
- cls.verbose = int(os.getenv("V", 0))
- except:
- cls.verbose = 0
-
- ## @var vpp_bin
- # String variable to store the path to vpp (vector packet processor).
- ## @var vpp_api_test_bin
- # String variable to store the path to vpp_api_test (vpp API test tool).
- ## @var vpp_cmdline
- # List of command line attributes for vpp.
- ## @var vpp_api_test_cmdline
- # List of command line attributes for vpp_api_test.
- ## @var verbose
- # Integer variable to store required verbosity level.
-
- ## Class method to start the test case.
- # 1. Initiate test case constants and set test case variables to default
- # values.
- # 2. Remove files from the shared memory.
- # 3. Start vpp as a subprocess.
- # @param cls The class pointer.
+ def get_packet_count_for_if_idx(cls, dst_if_index):
+ """Get the number of packet info for specified destination if index"""
+ if dst_if_index in cls._packet_count_for_dst_if_idx:
+ return cls._packet_count_for_dst_if_idx[dst_if_index]
+ else:
+ return 0
+
@classmethod
def setUpClass(cls):
- cls.setUpConstants()
- cls.pg_streams = []
- cls.MY_MACS = {}
- cls.MY_IP4S = {}
- cls.MY_IP6S = {}
- cls.VPP_MACS = {}
- cls.VPP_IP4S = {}
- cls.VPP_IP6S = {}
- cls.packet_infos = {}
- print "=================================================================="
- print YELLOW + getdoc(cls) + END
- print "=================================================================="
- os.system("rm -f /dev/shm/unittest-global_vm")
- os.system("rm -f /dev/shm/unittest-vpe-api")
- os.system("rm -f /dev/shm/unittest-db")
- cls.vpp = subprocess.Popen(cls.vpp_cmdline, stderr=subprocess.PIPE)
- ## @var pg_streams
- # List variable to store packet-generator streams for interfaces.
- ## @var MY_MACS
- # Dictionary variable to store host MAC addresses connected to packet
- # generator interfaces.
- ## @var MY_IP4S
- # Dictionary variable to store host IPv4 addresses connected to packet
- # generator interfaces.
- ## @var MY_IP6S
- # Dictionary variable to store host IPv6 addresses connected to packet
- # generator interfaces.
- ## @var VPP_MACS
- # Dictionary variable to store VPP MAC addresses of the packet
- # generator interfaces.
- ## @var VPP_IP4S
- # Dictionary variable to store VPP IPv4 addresses of the packet
- # generator interfaces.
- ## @var VPP_IP6S
- # Dictionary variable to store VPP IPv6 addresses of the packet
- # generator interfaces.
- ## @var vpp
- # Test case object variable to store file descriptor of running vpp
- # subprocess with open pipe to the standard error stream per
- # VppTestCase object.
-
- ## Class method to do cleaning when all tests (test_) defined for
- # VppTestCase class are finished.
- # 1. Terminate vpp and kill all vpp instances.
- # 2. Remove files from the shared memory.
- # @param cls The class pointer.
- @classmethod
- def quit(cls):
- cls.vpp.terminate()
- cls.vpp = None
- os.system("rm -f /dev/shm/unittest-global_vm")
- os.system("rm -f /dev/shm/unittest-vpe-api")
- os.system("rm -f /dev/shm/unittest-db")
-
- ## Class method to define tear down action of the VppTestCase class.
- # @param cls The class pointer.
+ super(VppTestCase, cls).setUpClass()
+ cls.reset_packet_infos()
+ cls._pcaps = []
+ cls._old_pcaps = []
+
@classmethod
def tearDownClass(cls):
- cls.quit()
-
- ## Method to define tear down VPP actions of the test case.
- # @param self The object pointer.
- def tearDown(self):
- self.cli(2, "show int")
- self.cli(2, "show trace")
- self.cli(2, "show hardware")
- self.cli(2, "show ip arp")
- self.cli(2, "show ip fib")
- self.cli(2, "show error")
- self.cli(2, "show run")
-
- ## Method to define setup action of the test case.
- # @param self The object pointer.
- def setUp(self):
- self.cli(2, "clear trace")
-
- ## Class method to print logs.
- # Based on set level of verbosity print text in the terminal.
- # @param cls The class pointer.
- # @param s String variable to store text to be printed.
- # @param v Integer variable to store required level of verbosity.
+ cls.logger.debug("--- tearDownClass() for %s called ---" % cls.__name__)
+ cls.reset_packet_infos()
+ super(VppTestCase, cls).tearDownClass()
+
@classmethod
- def log(cls, s, v=1):
- if cls.verbose >= v:
- print "LOG: " + LPURPLE + s + END
-
- ## Class method to execute api commands.
- # Based on set level of verbosity print the output of the api command in
- # the terminal.
- # @param cls The class pointer.
- # @param s String variable to store api command string.
+ def pg_enable_capture(cls, interfaces=None):
+ """
+ Enable capture on packet-generator interfaces
+
+ :param interfaces: iterable interface indexes (if None,
+ use self.pg_interfaces)
+
+ """
+ if interfaces is None:
+ interfaces = cls.pg_interfaces
+ for i in interfaces:
+ i.enable_capture()
+
@classmethod
- def api(cls, s):
- p = subprocess.Popen(cls.vpp_api_test_cmdline,
- stdout=subprocess.PIPE,
- stdin=subprocess.PIPE,
- stderr=subprocess.PIPE)
- if cls.verbose > 0:
- print "API: " + RED + s + END
- p.stdin.write(s)
- out = p.communicate()[0]
- out = out.replace("vat# ", "", 2)
- if cls.verbose > 0:
- if len(out) > 1:
- print YELLOW + out + END
- ## @var p
- # Object variable to store file descriptor of vpp_api_test subprocess
- # with open pipes to the standard output, inputs and error streams.
- ## @var out
- # Tuple variable to store standard output of vpp_api_test subprocess
- # where the string "vat# " is replaced by empty string later.
-
- ## Class method to execute cli commands.
- # Based on set level of verbosity of the log and verbosity defined by
- # environmental variable execute the cli command and print the output in
- # the terminal.
- # CLI command is executed via vpp API test tool (exec + cli_command)
- # @param cls The class pointer.
- # @param v Integer variable to store required level of verbosity.
- # @param s String variable to store cli command string.
+ def register_pcap(cls, intf, worker):
+ """Register a pcap in the testclass"""
+ # add to the list of captures with current timestamp
+ cls._pcaps.append((intf, worker))
+
@classmethod
- def cli(cls, v, s):
- if cls.verbose < v:
- return
- p = subprocess.Popen(cls.vpp_api_test_cmdline,
- stdout=subprocess.PIPE,
- stdin=subprocess.PIPE,
- stderr=subprocess.PIPE)
- if cls.verbose > 0:
- print "CLI: " + RED + s + END
- p.stdin.write('exec ' + s)
- out = p.communicate()[0]
- out = out.replace("vat# ", "", 2)
- if cls.verbose > 0:
- if len(out) > 1:
- print YELLOW + out + END
- ## @var p
- # Object variable to store file descriptor of vpp_api_test subprocess
- # with open pipes to the standard output, inputs and error streams.
- ## @var out
- # Tuple variable to store standard output of vpp_api_test subprocess
- # where the string "vat# " is replaced by empty string later.
-
- ## Class method to create incoming packet stream for the packet-generator
- # interface.
- # Delete old /tmp/pgX_in.pcap file if exists and create the empty one and
- # fill it with provided packets and add it to pg_streams list.
- # @param cls The class pointer.
- # @param i Integer variable to store the index of the packet-generator
- # interface to create packet stream for.
- # @param pkts List variable to store packets to be added to the stream.
+ def pg_start(cls, trace=True, traceFilter=False):
+ """Enable the PG, wait till it is done, then clean up"""
+ for intf, worker in cls._old_pcaps:
+ intf.remove_old_pcap_file(intf.get_in_path(worker))
+ cls._old_pcaps = []
+ if trace:
+ cls.vapi.cli("clear trace")
+ cls.vapi.cli("trace add pg-input 1000" + (" filter" if traceFilter else ""))
+ cls.vapi.cli("packet-generator enable")
+ # PG, when starts, runs to completion -
+ # so let's avoid a race condition,
+ # and wait a little till it's done.
+ # Then clean it up - and then be gone.
+ deadline = time.time() + 300
+ while cls.vapi.cli("show packet-generator").find("Yes") != -1:
+ cls.sleep(0.01) # yield
+ if time.time() > deadline:
+ cls.logger.error("Timeout waiting for pg to stop")
+ break
+ for intf, worker in cls._pcaps:
+ cls.vapi.cli("packet-generator delete %s" % intf.get_cap_name(worker))
+ cls._old_pcaps = cls._pcaps
+ cls._pcaps = []
+
@classmethod
- def pg_add_stream(cls, i, pkts):
- os.system("rm -f /tmp/pg%u_in.pcap" % i)
- wrpcap("/tmp/pg%u_in.pcap" % i, pkts)
- # no equivalent API command
- cls.cli(0, "packet-generator new pcap /tmp/pg%u_in.pcap source pg%u"
- " name pcap%u" % (i, i, i))
- cls.pg_streams.append('pcap%u' % i)
-
- ## Class method to enable packet capturing for the packet-generator
- # interface.
- # Delete old /tmp/pgX_out.pcap file if exists and set the packet-generator
- # to capture outgoing packets to /tmp/pgX_out.pcap file.
- # @param cls The class pointer.
- # @param args List variable to store the indexes of the packet-generator
- # interfaces to start packet capturing for.
+ def create_pg_interfaces_internal(cls, interfaces, gso=0, gso_size=0, mode=None):
+ """
+ Create packet-generator interfaces.
+
+ :param interfaces: iterable indexes of the interfaces.
+ :returns: List of created interfaces.
+
+ """
+ result = []
+ for i in interfaces:
+ intf = VppPGInterface(cls, i, gso, gso_size, mode)
+ setattr(cls, intf.name, intf)
+ result.append(intf)
+ cls.pg_interfaces = result
+ return result
+
@classmethod
- def pg_enable_capture(cls, args):
- for i in args:
- os.system("rm -f /tmp/pg%u_out.pcap" % i)
- cls.cli(0, "packet-generator capture pg%u pcap /tmp/pg%u_out.pcap"
- % (i, i))
-
- ## Class method to start packet sending.
- # Start to send packets for all defined pg streams. Delete every stream
- # from the stream list when sent and clear the pg_streams list.
- # @param cls The class pointer.
+ def create_pg_ip4_interfaces(cls, interfaces, gso=0, gso_size=0):
+ if not hasattr(cls, "vpp"):
+ cls.pg_interfaces = []
+ return cls.pg_interfaces
+ pgmode = VppEnum.vl_api_pg_interface_mode_t
+ return cls.create_pg_interfaces_internal(
+ interfaces, gso, gso_size, pgmode.PG_API_MODE_IP4
+ )
+
@classmethod
- def pg_start(cls):
- cls.cli(2, "trace add pg-input 50") # 50 is maximum
- cls.cli(0, 'packet-generator enable')
- for stream in cls.pg_streams:
- cls.cli(0, 'packet-generator delete %s' % stream)
- cls.pg_streams = []
-
- ## Class method to return captured packets.
- # Return packet captured for the defined packet-generator interface. Open
- # the corresponding pcap file (/tmp/pgX_out.pcap), read the content and
- # store captured packets to output variable.
- # @param cls The class pointer.
- # @param o Integer variable to store the index of the packet-generator
- # interface.
- # @return output List of packets captured on the defined packet-generator
- # interface. If the corresponding pcap file (/tmp/pgX_out.pcap) does not
- # exist return empty list.
+ def create_pg_ip6_interfaces(cls, interfaces, gso=0, gso_size=0):
+ if not hasattr(cls, "vpp"):
+ cls.pg_interfaces = []
+ return cls.pg_interfaces
+ pgmode = VppEnum.vl_api_pg_interface_mode_t
+ return cls.create_pg_interfaces_internal(
+ interfaces, gso, gso_size, pgmode.PG_API_MODE_IP6
+ )
+
@classmethod
- def pg_get_capture(cls, o):
- pcap_filename = "/tmp/pg%u_out.pcap" % o
- try:
- output = rdpcap(pcap_filename)
- except IOError: # TODO
- cls.log("WARNING: File %s does not exist, probably because no"
- " packets arrived" % pcap_filename)
- return []
- return output
- ## @var pcap_filename
- # File descriptor to the corresponding pcap file.
-
- ## Class method to create packet-generator interfaces.
- # Create packet-generator interfaces and add host MAC addresses connected
- # to these packet-generator interfaces to the MY_MACS dictionary.
- # @param cls The class pointer.
- # @param args List variable to store the indexes of the packet-generator
- # interfaces to be created.
+ def create_pg_interfaces(cls, interfaces, gso=0, gso_size=0):
+ if not hasattr(cls, "vpp"):
+ cls.pg_interfaces = []
+ return cls.pg_interfaces
+ pgmode = VppEnum.vl_api_pg_interface_mode_t
+ return cls.create_pg_interfaces_internal(
+ interfaces, gso, gso_size, pgmode.PG_API_MODE_ETHERNET
+ )
+
+ @classmethod
+ def create_pg_ethernet_interfaces(cls, interfaces, gso=0, gso_size=0):
+ if not hasattr(cls, "vpp"):
+ cls.pg_interfaces = []
+ return cls.pg_interfaces
+ pgmode = VppEnum.vl_api_pg_interface_mode_t
+ return cls.create_pg_interfaces_internal(
+ interfaces, gso, gso_size, pgmode.PG_API_MODE_ETHERNET
+ )
+
@classmethod
- def create_interfaces(cls, args):
- for i in args:
- cls.MY_MACS[i] = "02:00:00:00:ff:%02x" % i
- cls.log("My MAC address is %s" % (cls.MY_MACS[i]))
- cls.api("pg_create_interface if_id %u" % i)
- cls.api("sw_interface_set_flags pg%u admin-up" % i)
-
- ## Static method to extend packet to specified size
- # Extend provided packet to the specified size (including Ethernet FCS).
- # The packet is extended by adding corresponding number of spaces to the
- # packet payload.
- # NOTE: Currently works only when Raw layer is present.
- # @param packet Variable to store packet object.
- # @param size Integer variable to store the required size of the packet.
+ def create_loopback_interfaces(cls, count):
+ """
+ Create loopback interfaces.
+
+ :param count: number of interfaces created.
+ :returns: List of created interfaces.
+ """
+ if not hasattr(cls, "vpp"):
+ cls.lo_interfaces = []
+ return cls.lo_interfaces
+ result = [VppLoInterface(cls) for i in range(count)]
+ for intf in result:
+ setattr(cls, intf.name, intf)
+ cls.lo_interfaces = result
+ return result
+
+ @classmethod
+ def create_bvi_interfaces(cls, count):
+ """
+ Create BVI interfaces.
+
+ :param count: number of interfaces created.
+ :returns: List of created interfaces.
+ """
+ if not hasattr(cls, "vpp"):
+ cls.bvi_interfaces = []
+ return cls.bvi_interfaces
+ result = [VppBviInterface(cls) for i in range(count)]
+ for intf in result:
+ setattr(cls, intf.name, intf)
+ cls.bvi_interfaces = result
+ return result
+
@staticmethod
- def extend_packet(packet, size):
+ def extend_packet(packet, size, padding=" "):
+ """
+ Extend packet to given size by padding with spaces or custom padding
+ NOTE: Currently works only when Raw layer is present.
+
+ :param packet: packet
+ :param size: target size
+ :param padding: padding used to extend the payload
+
+ """
packet_len = len(packet) + 4
extend = size - packet_len
if extend > 0:
- packet[Raw].load += ' ' * extend
- ## @var packet_len
- # Integer variable to store the current packet length including
- # Ethernet FCS.
- ## @var extend
- # Integer variable to store the size of the packet extension.
-
- ## Method to add packet info object to the packet_infos list.
- # Extend the existing packet_infos list with the given information from
- # the packet.
- # @param self The object pointer.
- # @param info Object to store required information from the packet.
- def add_packet_info_to_list(self, info):
- info.index = len(self.packet_infos)
- self.packet_infos[info.index] = info
- ## @var info.index
- # Info object attribute to store the packet order in the stream.
- ## @var packet_infos
- # List variable to store required information from packets.
-
- ## Method to create packet info object.
- # Create the existing packet_infos list with the given information from
- # the packet.
- # @param self The object pointer.
- # @param pg_id Integer variable to store the index of the packet-generator
- # interface.
- def create_packet_info(self, pg_id, target_id):
+ num = (extend // len(padding)) + 1
+ packet[Raw].load += (padding * num)[:extend].encode("ascii")
+
+ @classmethod
+ def reset_packet_infos(cls):
+ """Reset the list of packet info objects and packet counts to zero"""
+ cls._packet_infos = {}
+ cls._packet_count_for_dst_if_idx = {}
+
+ @classmethod
+ def create_packet_info(cls, src_if, dst_if):
+ """
+ Create packet info object containing the source and destination indexes
+ and add it to the testcase's packet info list
+
+ :param VppInterface src_if: source interface
+ :param VppInterface dst_if: destination interface
+
+ :returns: _PacketInfo object
+
+ """
info = _PacketInfo()
- self.add_packet_info_to_list(info)
- info.src = pg_id
- info.dst = target_id
+ info.index = len(cls._packet_infos)
+ info.src = src_if.sw_if_index
+ info.dst = dst_if.sw_if_index
+ if isinstance(dst_if, VppSubInterface):
+ dst_idx = dst_if.parent.sw_if_index
+ else:
+ dst_idx = dst_if.sw_if_index
+ if dst_idx in cls._packet_count_for_dst_if_idx:
+ cls._packet_count_for_dst_if_idx[dst_idx] += 1
+ else:
+ cls._packet_count_for_dst_if_idx[dst_idx] = 1
+ cls._packet_infos[info.index] = info
return info
- ## @var info
- # Object to store required information from packet.
- ## @var info.src
- # Info object attribute to store the index of the source packet
- # generator interface of the packet.
- ## @var info.dst
- # Info object attribute to store the index of the destination packet
- # generator interface of the packet.
-
- ## Static method to return packet info string.
- # Create packet info string from the provided info object that will be put
- # to the packet payload.
- # @param info Object to store required information from the packet.
- # @return String of information about packet's order in the stream, source
- # and destination packet generator interface.
+
@staticmethod
def info_to_payload(info):
- return "%d %d %d" % (info.index, info.src, info.dst)
+ """
+ Convert _PacketInfo object to packet payload
+
+ :param info: _PacketInfo object
+
+ :returns: string containing serialized data from packet info
+ """
+
+ # retrieve payload, currently 18 bytes (4 x ints + 1 short)
+ return pack("iiiih", info.index, info.src, info.dst, info.ip, info.proto)
- ## Static method to create packet info object from the packet payload.
- # Create packet info object and set its attribute values based on data
- # gained from the packet payload.
- # @param payload String variable to store packet payload.
- # @return info Object to store required information about the packet.
@staticmethod
- def payload_to_info(payload):
- numbers = payload.split()
+ def payload_to_info(payload, payload_field="load"):
+ """
+ Convert packet payload to _PacketInfo object
+
+ :param payload: packet payload
+ :type payload: <class 'scapy.packet.Raw'>
+ :param payload_field: packet fieldname of payload "load" for
+ <class 'scapy.packet.Raw'>
+ :type payload_field: str
+ :returns: _PacketInfo object containing de-serialized data from payload
+
+ """
+
+ # retrieve payload, currently 18 bytes (4 x ints + 1 short)
+ payload_b = getattr(payload, payload_field)[:18]
+
info = _PacketInfo()
- info.index = int(numbers[0])
- info.src = int(numbers[1])
- info.dst = int(numbers[2])
+ info.index, info.src, info.dst, info.ip, info.proto = unpack("iiiih", payload_b)
+
+ # some SRv6 TCs depend on get an exception if bad values are detected
+ if info.index > 0x4000:
+ raise ValueError("Index value is invalid")
+
return info
- ## @var info.index
- # Info object attribute to store the packet order in the stream.
- ## @var info.src
- # Info object attribute to store the index of the source packet
- # generator interface of the packet.
- ## @var info.dst
- # Info object attribute to store the index of the destination packet
- # generator interface of the packet.
-
- ## Method to return packet info object of the next packet in
- # the packet_infos list.
- # Get the next packet info object from the packet_infos list by increasing
- # the packet_infos list index by one.
- # @param self The object pointer.
- # @param info Object to store required information about the packet.
- # @return packet_infos[next_index] Next info object from the packet_infos
- # list with stored information about packets. Return None if the end of
- # the list is reached.
+
def get_next_packet_info(self, info):
+ """
+ Iterate over the packet info list stored in the testcase
+ Start iteration with first element if info is None
+ Continue based on index in info if info is specified
+
+ :param info: info or None
+ :returns: next info in list or None if no more infos
+ """
if info is None:
next_index = 0
else:
next_index = info.index + 1
- if next_index == len(self.packet_infos):
+ if next_index == len(self._packet_infos):
return None
else:
- return self.packet_infos[next_index]
- ## @var next_index
- # Integer variable to store the index of the next info object.
-
- ## Method to return packet info object of the next packet with the required
- # source packet generator interface.
- # Iterate over the packet_infos list and search for the next packet info
- # object with the required source packet generator interface.
- # @param self The object pointer.
- # @param src_pg Integer variable to store index of requested source packet
- # generator interface.
- # @param info Object to store required information about the packet.
- # @return packet_infos[next_index] Next info object from the packet_infos
- # list with stored information about packets. Return None if the end of
- # the list is reached.
- def get_next_packet_info_for_interface(self, src_pg, info):
+ return self._packet_infos[next_index]
+
+ def get_next_packet_info_for_interface(self, src_index, info):
+ """
+ Search the packet info list for the next packet info with same source
+ interface index
+
+ :param src_index: source interface index to search for
+ :param info: packet info - where to start the search
+ :returns: packet info or None
+
+ """
while True:
info = self.get_next_packet_info(info)
if info is None:
return None
- if info.src == src_pg:
+ if info.src == src_index:
return info
- ## @var info.src
- # Info object attribute to store the index of the source packet
- # generator interface of the packet.
-
- ## Method to return packet info object of the next packet with required
- # source and destination packet generator interfaces.
- # Search for the next packet info object with the required source and
- # destination packet generator interfaces.
- # @param self The object pointer.
- # @param src_pg Integer variable to store the index of the requested source
- # packet generator interface.
- # @param dst_pg Integer variable to store the index of the requested source
- # packet generator interface.
- # @param info Object to store required information about the packet.
- # @return info Object with the info about the next packet with with
- # required source and destination packet generator interfaces. Return None
- # if there is no other packet with required data.
- def get_next_packet_info_for_interface2(self, src_pg, dst_pg, info):
+
+ def get_next_packet_info_for_interface2(self, src_index, dst_index, info):
+ """
+ Search the packet info list for the next packet info with same source
+ and destination interface indexes
+
+ :param src_index: source interface index to search for
+ :param dst_index: destination interface index to search for
+ :param info: packet info - where to start the search
+ :returns: packet info or None
+
+ """
while True:
- info = self.get_next_packet_info_for_interface(src_pg, info)
+ info = self.get_next_packet_info_for_interface(src_index, info)
if info is None:
return None
- if info.dst == dst_pg:
+ if info.dst == dst_index:
return info
- ## @var info.dst
- # Info object attribute to store the index of the destination packet
- # generator interface of the packet.
-
-
-## Subclass of the python unittest.TestResult class.
-#
-# This subclass provides methods to compile information about which tests have
-# succeeded and which have failed.
-class VppTestResult(unittest.TestResult):
- ## The constructor.
- # @param stream File descriptor to store where to report test results. Set
- # to the standard error stream by default.
- # @param descriptions Boolean variable to store information if to use test
- # case descriptions.
- # @param verbosity Integer variable to store required verbosity level.
- def __init__(self, stream, descriptions, verbosity):
- unittest.TestResult.__init__(self, stream, descriptions, verbosity)
- self.stream = stream
- self.descriptions = descriptions
- self.verbosity = verbosity
- self.result_string = None
- ## @var result_string
- # String variable to store the test case result string.
-
-
- ## Method called when the test case succeeds.
- # Run the default implementation (that does nothing) and set the result
- # string in case of test case success.
- # @param self The object pointer.
- # @param test Object variable to store the test case instance.
- def addSuccess(self, test):
- unittest.TestResult.addSuccess(self, test)
- self.result_string = GREEN + "OK" + END
- ## @var result_string
- # String variable to store the test case result string.
-
- ## Method called when the test case signals a failure.
- # Run the default implementation that appends a tuple (test, formatted_err)
- # to the instance's failures attribute, where formatted_err is a formatted
- # traceback derived from err and set the result string in case of test case
- # success.
- # @param self The object pointer.
- # @param test Object variable to store the test case instance.
- # @param err Tuple variable to store the error data:
- # (type, value, traceback).
- def addFailure(self, test, err):
- unittest.TestResult.addFailure(self, test, err)
- self.result_string = RED + "FAIL" + END
- ## @var result_string
- # String variable to store the test case result string.
-
- ## Method called when the test case raises an unexpected exception.
- # Run the default implementation that appends a tuple (test, formatted_err)
- # to the instance's error attribute, where formatted_err is a formatted
- # traceback derived from err and set the result string in case of test case
- # unexpected failure.
- # @param self The object pointer.
- # @param test Object variable to store the test case instance.
- # @param err Tuple variable to store the error data:
- # (type, value, traceback).
- def addError(self, test, err):
- unittest.TestResult.addError(self, test, err)
- self.result_string = RED + "ERROR" + END
- ## @var result_string
- # String variable to store the test case result string.
-
- ## Method to get the description of the test case.
- # Used to get the description string from the test case object.
- # @param self The object pointer.
- # @param test Object variable to store the test case instance.
- # @return String of the short description if exist otherwise return test
- # case name string.
- def getDescription(self, test):
- # TODO: if none print warning not raise exception
- short_description = test.shortDescription()
- if self.descriptions and short_description:
- return short_description
- else:
- return str(test)
- ## @var short_description
- # String variable to store the short description of the test case.
-
- ## Method called when the test case is about to be run.
- # Run the default implementation and based on the set verbosity level write
- # the starting string to the output stream.
- # @param self The object pointer.
- # @param test Object variable to store the test case instance.
- def startTest(self, test):
- unittest.TestResult.startTest(self, test)
- if self.verbosity > 0:
- self.stream.writeln("Starting " + self.getDescription(test) + " ...")
- self.stream.writeln("------------------------------------------------------------------")
-
- ## Method called after the test case has been executed.
- # Run the default implementation and based on the set verbosity level write
- # the result string to the output stream.
- # @param self The object pointer.
- # @param test Object variable to store the test case instance.
- def stopTest(self, test):
- unittest.TestResult.stopTest(self, test)
- if self.verbosity > 0:
- self.stream.writeln("------------------------------------------------------------------")
- self.stream.writeln("%-60s%s" % (self.getDescription(test), self.result_string))
- self.stream.writeln("------------------------------------------------------------------")
- else:
- self.stream.writeln("%-60s%s" % (self.getDescription(test), self.result_string))
-
- ## Method to write errors and failures information to the output stream.
- # Write content of errors and failures lists to the output stream.
- # @param self The object pointer.
- def printErrors(self):
- self.stream.writeln()
- self.printErrorList('ERROR', self.errors)
- self.printErrorList('FAIL', self.failures)
- ## @var errors
- # List variable containing 2-tuples of TestCase instances and strings
- # holding formatted tracebacks. Each tuple represents a test which
- # raised an unexpected exception.
- ## @var failures
- # List variable containing 2-tuples of TestCase instances and strings
- # holding formatted tracebacks. Each tuple represents a test where
- # a failure was explicitly signalled using the TestCase.assert*()
- # methods.
-
- ## Method to write the error information to the output stream.
- # Write content of error lists to the output stream together with error
- # type and test case description.
- # @param self The object pointer.
- # @param flavour String variable to store error type.
- # @param errors List variable to store 2-tuples of TestCase instances and
- # strings holding formatted tracebacks.
- def printErrorList(self, flavour, errors):
- for test, err in errors:
- self.stream.writeln('=' * 70)
- self.stream.writeln("%s: %s" % (flavour, self.getDescription(test)))
- self.stream.writeln('-' * 70)
- self.stream.writeln("%s" % err)
- ## @var test
- # Object variable to store the test case instance.
- ## @var err
- # String variable to store formatted tracebacks.
-
-
-## Subclass of the python unittest.TextTestRunner class.
-#
-# A basic test runner implementation which prints results on standard error.
-class VppTestRunner(unittest.TextTestRunner):
- ## Class object variable to store the results of a set of tests.
- resultclass = VppTestResult
-
- ## Method to run the test.
- # Print debug message in the terminal and run the standard run() method
- # of the test runner collecting the result into the test result object.
- # @param self The object pointer.
- # @param test Object variable to store the test case instance.
- # @return Test result object of the VppTestRunner.
- def run(self, test):
- print "Running tests using custom test runner" # debug message
- return super(VppTestRunner, self).run(test)
+
+ def assert_packet_checksums_valid(self, packet, ignore_zero_udp_checksums=True):
+ received = packet.__class__(scapy.compat.raw(packet))
+ udp_layers = ["UDP", "UDPerror"]
+ checksum_fields = ["cksum", "chksum"]
+ checksums = []
+ counter = 0
+ temp = received.__class__(scapy.compat.raw(received))
+ while True:
+ layer = temp.getlayer(counter)
+ if layer:
+ layer = layer.copy()
+ layer.remove_payload()
+ for cf in checksum_fields:
+ if hasattr(layer, cf):
+ if (
+ ignore_zero_udp_checksums
+ and 0 == getattr(layer, cf)
+ and layer.name in udp_layers
+ ):
+ continue
+ delattr(temp.getlayer(counter), cf)
+ checksums.append((counter, cf))
+ else:
+ break
+ counter = counter + 1
+ if 0 == len(checksums):
+ return
+ temp = temp.__class__(scapy.compat.raw(temp))
+ for layer, cf in reversed(checksums):
+ calc_sum = getattr(temp[layer], cf)
+ self.assert_equal(
+ getattr(received[layer], cf),
+ calc_sum,
+ "packet checksum on layer #%d: %s" % (layer, temp[layer].name),
+ )
+ self.logger.debug(
+ "Checksum field `%s` on `%s` layer has correct value `%s`"
+ % (cf, temp[layer].name, calc_sum)
+ )
+
+ def assert_checksum_valid(
+ self,
+ received_packet,
+ layer,
+ checksum_field_names=["chksum", "cksum"],
+ ignore_zero_checksum=False,
+ ):
+ """Check checksum of received packet on given layer"""
+ layer_copy = received_packet[layer].copy()
+ layer_copy.remove_payload()
+ field_name = None
+ for f in checksum_field_names:
+ if hasattr(layer_copy, f):
+ field_name = f
+ break
+ if field_name is None:
+ raise Exception(
+ f"Layer `{layer}` has none of checksum fields: `{checksum_field_names}`."
+ )
+ received_packet_checksum = getattr(received_packet[layer], field_name)
+ if ignore_zero_checksum and 0 == received_packet_checksum:
+ return
+ recalculated = received_packet.__class__(scapy.compat.raw(received_packet))
+ delattr(recalculated[layer], field_name)
+ recalculated = recalculated.__class__(scapy.compat.raw(recalculated))
+ self.assert_equal(
+ received_packet_checksum,
+ getattr(recalculated[layer], field_name),
+ f"packet checksum (field: {field_name}) on layer: %s" % layer,
+ )
+
+ def assert_ip_checksum_valid(self, received_packet, ignore_zero_checksum=False):
+ self.assert_checksum_valid(
+ received_packet, "IP", ignore_zero_checksum=ignore_zero_checksum
+ )
+
+ def assert_tcp_checksum_valid(self, received_packet, ignore_zero_checksum=False):
+ self.assert_checksum_valid(
+ received_packet, "TCP", ignore_zero_checksum=ignore_zero_checksum
+ )
+
+ def assert_udp_checksum_valid(self, received_packet, ignore_zero_checksum=True):
+ self.assert_checksum_valid(
+ received_packet, "UDP", ignore_zero_checksum=ignore_zero_checksum
+ )
+
+ def assert_embedded_icmp_checksum_valid(self, received_packet):
+ if received_packet.haslayer(IPerror):
+ self.assert_checksum_valid(received_packet, "IPerror")
+ if received_packet.haslayer(TCPerror):
+ self.assert_checksum_valid(received_packet, "TCPerror")
+ if received_packet.haslayer(UDPerror):
+ self.assert_checksum_valid(
+ received_packet, "UDPerror", ignore_zero_checksum=True
+ )
+ if received_packet.haslayer(ICMPerror):
+ self.assert_checksum_valid(received_packet, "ICMPerror")
+
+ def assert_icmp_checksum_valid(self, received_packet):
+ self.assert_checksum_valid(received_packet, "ICMP")
+ self.assert_embedded_icmp_checksum_valid(received_packet)
+
+ def assert_icmpv6_checksum_valid(self, pkt):
+ if pkt.haslayer(ICMPv6DestUnreach):
+ self.assert_checksum_valid(pkt, "ICMPv6DestUnreach")
+ self.assert_embedded_icmp_checksum_valid(pkt)
+ if pkt.haslayer(ICMPv6EchoRequest):
+ self.assert_checksum_valid(pkt, "ICMPv6EchoRequest")
+ if pkt.haslayer(ICMPv6EchoReply):
+ self.assert_checksum_valid(pkt, "ICMPv6EchoReply")
+
+ def assert_packet_counter_equal(self, counter, expected_value):
+ counter_value = self.get_counter(counter)
+ self.assert_equal(
+ counter_value, expected_value, "packet counter `%s'" % counter
+ )
+
+ def pg_send(self, intf, pkts, worker=None, trace=True):
+ intf.add_stream(pkts, worker=worker)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start(trace=trace)
+
+ def send_and_assert_no_replies(
+ self, intf, pkts, remark="", timeout=None, stats_diff=None, trace=True, msg=None
+ ):
+ if stats_diff:
+ stats_snapshot = self.snapshot_stats(stats_diff)
+
+ self.pg_send(intf, pkts)
+
+ try:
+ if not timeout:
+ timeout = 1
+ for i in self.pg_interfaces:
+ i.assert_nothing_captured(timeout=timeout, remark=remark)
+ timeout = 0.1
+ finally:
+ if trace:
+ if msg:
+ self.logger.debug(f"send_and_assert_no_replies: {msg}")
+ self.logger.debug(self.vapi.cli("show trace"))
+
+ if stats_diff:
+ self.compare_stats_with_snapshot(stats_diff, stats_snapshot)
+
+ def send_and_expect(
+ self,
+ intf,
+ pkts,
+ output,
+ n_rx=None,
+ worker=None,
+ trace=True,
+ msg=None,
+ stats_diff=None,
+ ):
+ if stats_diff:
+ stats_snapshot = self.snapshot_stats(stats_diff)
+
+ if not n_rx:
+ n_rx = 1 if isinstance(pkts, Packet) else len(pkts)
+ self.pg_send(intf, pkts, worker=worker, trace=trace)
+ rx = output.get_capture(n_rx)
+ if trace:
+ if msg:
+ self.logger.debug(f"send_and_expect: {msg}")
+ self.logger.debug(self.vapi.cli("show trace"))
+
+ if stats_diff:
+ self.compare_stats_with_snapshot(stats_diff, stats_snapshot)
+
+ return rx
+
+ def send_and_expect_load_balancing(
+ self, input, pkts, outputs, worker=None, trace=True
+ ):
+ self.pg_send(input, pkts, worker=worker, trace=trace)
+ rxs = []
+ for oo in outputs:
+ rx = oo._get_capture(1)
+ self.assertNotEqual(0, len(rx), f"0 != len(rx) ({len(rx)})")
+ rxs.append(rx)
+ if trace:
+ self.logger.debug(self.vapi.cli("show trace"))
+ return rxs
+
+ def send_and_expect_some(self, intf, pkts, output, worker=None, trace=True):
+ self.pg_send(intf, pkts, worker=worker, trace=trace)
+ rx = output._get_capture(1)
+ if trace:
+ self.logger.debug(self.vapi.cli("show trace"))
+ self.assertTrue(len(rx) > 0)
+ self.assertTrue(
+ len(rx) <= len(pkts), f"len(rx) ({len(rx)}) > len(pkts) ({len(pkts)})"
+ )
+ return rx
+
+ def send_and_expect_only(self, intf, pkts, output, timeout=None, stats_diff=None):
+ if stats_diff:
+ stats_snapshot = self.snapshot_stats(stats_diff)
+
+ self.pg_send(intf, pkts)
+ rx = output.get_capture(len(pkts))
+ outputs = [output]
+ if not timeout:
+ timeout = 1
+ for i in self.pg_interfaces:
+ if i not in outputs:
+ i.assert_nothing_captured(timeout=timeout)
+ timeout = 0.1
+
+ if stats_diff:
+ self.compare_stats_with_snapshot(stats_diff, stats_snapshot)
+
+ return rx
+
+
+if __name__ == "__main__":
+ pass
Code Review / vpp.git / blobdiff