aboutsummaryrefslogtreecommitdiffstats
path: root/resources/libraries
diff options
context:
space:
mode:
authorQun Wan <qun.wan@intel.com>2017-03-30 14:36:56 -0400
committerPeter Mikus <pmikus@cisco.com>2017-06-07 05:24:57 +0000
commit7436d8bdf60bca9b80fb76781e1f709bbcd435da (patch)
tree53a49da5dd22a88cf70c22848468f6d3a336a050 /resources/libraries
parentd058458cb57eaa68c9aafe03fa823e7489664bf0 (diff)
TLDK udwfwd test case:
- ip fragement for ipv4 - ip reassemble for ipv4 - ip checksum for ipv4 - ip checksum for ipv6 - ip fragment for ipv6 added the genpcap.py script to generate the pcap files and corresponding test scripts Change-Id: I01329dbb0ecd3c3a5dd7a63ef1dea01b2e717da5 Signed-off-by: qun wan <qun.wan@intel.com>
Diffstat (limited to 'resources/libraries')
-rw-r--r--resources/libraries/python/TLDK/SetupTLDKTest.py239
-rw-r--r--resources/libraries/python/TLDK/TLDKConstants.py31
-rw-r--r--resources/libraries/python/TLDK/UdpTest.py126
-rw-r--r--resources/libraries/python/TLDK/__init__.py16
-rw-r--r--resources/libraries/python/TLDK/gen_pcap.py100
-rw-r--r--resources/libraries/robot/TLDK/TLDKUtils.robot80
6 files changed, 592 insertions, 0 deletions
diff --git a/resources/libraries/python/TLDK/SetupTLDKTest.py b/resources/libraries/python/TLDK/SetupTLDKTest.py
new file mode 100644
index 0000000000..3e3511c382
--- /dev/null
+++ b/resources/libraries/python/TLDK/SetupTLDKTest.py
@@ -0,0 +1,239 @@
+# Copyright (c) 2017 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""This module exists to provide setup utilities for the framework on topology
+nodes. All tasks required to be run before the actual tests are started is
+supposed to end up here.
+"""
+
+from shlex import split
+from subprocess import Popen, PIPE, call
+from multiprocessing import Pool
+from tempfile import NamedTemporaryFile
+from os.path import basename
+import os
+
+from robot.api import logger
+from robot.libraries.BuiltIn import BuiltIn
+
+from resources.libraries.python.ssh import SSH
+from resources.libraries.python.TLDK.TLDKConstants import TLDKConstants as con
+from resources.libraries.python.topology import NodeType
+from resources.libraries.python.TLDK.gen_pcap import gen_all_pcap
+
+__all__ = ["SetupTLDKTest"]
+
+
+def pack_framework_dir():
+ """Pack the testing WS into temp file, return its name.
+ :returns: file_name
+ :rtype: str
+ :raises RuntimeError: If pack the testing framework failed.
+ """
+ # Remove the TLDK and DPDK dir existted.
+ os.system("rm -rf tldk")
+ os.system("rm -rf dpdk")
+ os.system("rm -f dpdk-16.11.1.tar.xz")
+
+ # Get the latest TLDK and dpdk code.
+ os.system("git clone https://gerrit.fd.io/r/tldk")
+ os.system("wget http://fast.dpdk.org/rel/dpdk-16.11.1.tar.xz")
+
+ # Generate pcap file used to execute test case.
+ gen_all_pcap()
+
+ tmpfile = NamedTemporaryFile(suffix=".tgz", prefix="TLDK-testing-")
+ file_name = tmpfile.name
+ tmpfile.close()
+
+ proc = Popen(
+ split("tar --exclude-vcs -zcf {0} .".format(file_name)),
+ stdout=PIPE, stderr=PIPE)
+ (stdout, stderr) = proc.communicate()
+
+ logger.debug(stdout)
+ logger.debug(stderr)
+
+ return_code = proc.wait()
+ if return_code != 0:
+ raise RuntimeError("Could not pack testing framework.")
+
+ return file_name
+
+
+def copy_tarball_to_node(tarball, node):
+ """Copy tarball file from local host to remote node.
+
+ :param tarball: Path to tarball to upload.
+ :param node: Dictionary created from topology.
+ :type tarball: str
+ :type node: dict
+ :returns: nothing.
+ """
+ logger.console('Copying tarball to {0}'.format(node['host']))
+ ssh = SSH()
+ ssh.connect(node)
+
+ ssh.scp(tarball, "/tmp/")
+
+
+def extract_tarball_at_node(tarball, node):
+ """Extract tarball at given node.
+
+ Extracts tarball using tar on given node to specific CSIT location.
+ Raise runtime errors when failed.
+
+ :param tarball: Path to tarball to upload.
+ :param node: Dictionary created from topology.
+ :type tarball: str
+ :type node: dict
+ :return: nothing
+ :raises RuntimeError: If extract tarball failed.
+ """
+ logger.console('Extracting tarball to {0} on {1}'.format(
+ con.REMOTE_FW_DIR, node['host']))
+ ssh = SSH()
+ ssh.connect(node)
+
+ cmd = 'sudo rm -rf {1}; mkdir {1} ; tar -zxf {0} -C {1}; ' \
+ 'rm -f {0}'.format(tarball, con.REMOTE_FW_DIR)
+ (ret_code, _, stderr) = ssh.exec_command(cmd, timeout=30)
+ if ret_code != 0:
+ logger.error('Unpack error: {0}'.format(stderr))
+ raise RuntimeError('Failed to unpack {0} at node {1}'.format(
+ tarball, node['host']))
+
+
+def create_env_directory_at_node(node):
+ """
+ Create fresh virtualenv to a directory, install pip requirements.
+
+ :param node: Dictionary created from topology, will only install in the TG.
+ :type node: dict
+ :returns: nothing
+ :raises RuntimeError: If the setup of virtualenv failed.
+ """
+ logger.console('Extracting virtualenv, installing requirements.txt '
+ 'on {0}'.format(node['host']))
+ ssh = SSH()
+ ssh.connect(node)
+ (ret_code, stdout, stderr) = ssh.exec_command(
+ 'cd {0} && rm -rf env && '
+ '. virtualenv --system-site-packages --never-download env && '
+ '. env/bin/activate && pip install -r requirements.txt'
+ .format(con.REMOTE_FW_DIR), timeout=100)
+ if ret_code != 0:
+ logger.error('Virtualenv creation error: {0}'.format(stdout + stderr))
+ raise RuntimeError('Virtualenv setup failed')
+ else:
+ logger.console('Virtualenv created on {0}'.format(node['host']))
+
+def install_tldk_test(node):
+ """Prepare the TLDK test envrionment.
+ Raise errors when failed.
+
+ :param node: Dictionary created from topology.
+ :type node: dict
+ :returns: nothing.
+ :raises RuntimeError: If install tldk failed.
+ """
+ logger.console('Install the TLDK on {0}'.format(node['host']))
+
+ ssh = SSH()
+ ssh.connect(node)
+
+ (ret_code, _, stderr) = ssh.exec_command(
+ 'cd {0}/{1} && ./install_tldk.sh'
+ .format(con.REMOTE_FW_DIR, con.TLDK_SCRIPTS), timeout=600)
+
+ if ret_code != 0:
+ logger.error('Install the TLDK error: {0}'.format(stderr))
+ raise RuntimeError('Install the TLDK failed')
+ else:
+ logger.console('Install the TLDK on {0} success!'.format(node['host']))
+
+def setup_node(args):
+ """Run all set-up methods for a node.
+
+ This method is used as map_async parameter. It receives tuple with all
+ parameters as passed to map_async function.
+
+ :param args: All parameters needed to setup one node.
+ :type args: tuple
+ :returns: True - success, False - error
+ :rtype: bool
+ :raises RuntimeError: If node setup failed.
+ """
+ tarball, remote_tarball, node = args
+ try:
+ copy_tarball_to_node(tarball, node)
+ extract_tarball_at_node(remote_tarball, node)
+ if node['type'] == NodeType.DUT:
+ install_tldk_test(node)
+ if node['type'] == NodeType.TG:
+ create_env_directory_at_node(node)
+ except RuntimeError as exc:
+ logger.error("Node setup failed, error:'{0}'".format(exc.message))
+ return False
+ else:
+ logger.console('Setup of node {0} done'.format(node['host']))
+ return True
+
+def delete_local_tarball(tarball):
+ """Delete local tarball to prevent disk pollution.
+
+ :param tarball: Path to tarball to upload.
+ :type tarball: str
+ :returns: nothing.
+ """
+ call(split('sh -c "rm {0} > /dev/null 2>&1"'.format(tarball)))
+
+
+class SetupTLDKTest(object):
+ """Setup suite run on topology nodes.
+
+ Many VAT/CLI based tests need the scripts at remote hosts before executing
+ them. This class packs the whole testing directory and copies it over
+ to all nodes in topology under /tmp/
+ """
+
+ @staticmethod
+ def setup_tldk_test(nodes):
+ """Pack the whole directory and extract in temp on each node."""
+
+ tarball = pack_framework_dir()
+ msg = 'Framework packed to {0}'.format(tarball)
+ logger.console(msg)
+ logger.trace(msg)
+ remote_tarball = "/tmp/{0}".format(basename(tarball))
+
+ # Turn off logging since we use multiprocessing.
+ log_level = BuiltIn().set_log_level('NONE')
+ params = ((tarball, remote_tarball, node) for node in nodes.values())
+ pool = Pool(processes=len(nodes))
+ result = pool.map_async(setup_node, params)
+ pool.close()
+ pool.join()
+
+ # Turn on logging.
+ BuiltIn().set_log_level(log_level)
+
+ logger.info(
+ 'Executed node setups in parallel, waiting for processes to end')
+ result.wait()
+
+ logger.info('Results: {0}'.format(result.get()))
+
+ logger.trace('Test framework copied to all topology nodes')
+ delete_local_tarball(tarball)
+ logger.console('All nodes are ready')
diff --git a/resources/libraries/python/TLDK/TLDKConstants.py b/resources/libraries/python/TLDK/TLDKConstants.py
new file mode 100644
index 0000000000..af9ebf2a8d
--- /dev/null
+++ b/resources/libraries/python/TLDK/TLDKConstants.py
@@ -0,0 +1,31 @@
+# Copyright (c) 2017 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+"""This file defines the constants variables for the TLDK test."""
+
+
+class TLDKConstants(object):
+ """Define the directory path for the TLDK test."""
+
+ # TLDK testing directory location at topology nodes
+ REMOTE_FW_DIR = '/tmp/TLDK-testing'
+
+ # Shell scripts location
+ TLDK_SCRIPTS = 'TLDK-tests/tldk_scripts'
+
+ # Libraries location
+ TLDK_DEPLIBS = 'TLDK-tests/tldk_deplibs'
+
+ # Config files location for the TLDK test
+ TLDK_TESTCONFIG = 'TLDK-tests/tldk_testconfig'
diff --git a/resources/libraries/python/TLDK/UdpTest.py b/resources/libraries/python/TLDK/UdpTest.py
new file mode 100644
index 0000000000..adf0888724
--- /dev/null
+++ b/resources/libraries/python/TLDK/UdpTest.py
@@ -0,0 +1,126 @@
+# Copyright (c) 2017 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+"""
+This module exists to provide the UDP test for TLDK on topology nodes.
+"""
+
+from scapy.utils import rdpcap
+from scapy.layers.inet import IP
+from scapy.layers.inet6 import IPv6
+
+from robot.libraries.BuiltIn import BuiltIn
+
+from resources.libraries.python.ssh import SSH
+from resources.libraries.python.TLDK.TLDKConstants import TLDKConstants as con
+from resources.libraries.python.topology import Topology
+
+class UdpTest(object):
+ """Test the TLDK UDP function."""
+
+ @staticmethod
+ def get_pcap_info(file_prefix):
+ """Get the Dest IP from the RX pcap file
+
+ :param file_prefix: the test case pcap file prefix
+ :type file_prefix: str
+ :returns: packet counts, dest ip, is or not ipv4
+ :rtype: tuple(int, str, bool).
+ """
+ exec_dir = BuiltIn().get_variable_value("${EXECDIR}")
+
+ rx_pcapfile = '{0}/{1}/{2}_rx.pcap' \
+ .format(exec_dir, con.TLDK_TESTCONFIG, file_prefix)
+ packets = rdpcap(rx_pcapfile)
+ count = len(packets)
+
+ ### the first packet
+ pkt = packets[0]
+ if pkt.type == 0x0800:
+ ### this is a IPv4 packet
+ dest_ip = pkt[IP].dst
+ is_ipv4 = True
+ elif pkt.type == 0x86dd:
+ ### this is a IPv6 packet
+ dest_ip = pkt[IPv6].dst
+ is_ipv4 = False
+
+ return count, dest_ip, is_ipv4
+
+ @staticmethod
+ def exec_the_udpfwd_test(dut_node, dut_if, file_prefix, \
+ dest_ip, is_ipv4=True):
+ """Execute the udpfwd on the dut_node.
+
+ :param dut_node: Will execute the udpfwd on this node.
+ :param dut_if: DUT interface name.
+ :param file_prefix: The test case config file prefix.
+ :param dest_ip: The UDP packet dest IP.
+ :param is_ipv4: Execute the IPv4 or IPv6 test.
+ :type dut_node: dict
+ :type dut_if: str
+ :type file_prefix: str
+ :type dest_ip: str
+ :type is_ipv4: bool
+ :returns: none.
+ :raises RuntimeError: If failed to execute udpfwd test on the dut node.
+ """
+ pci_address = Topology.get_interface_pci_addr(dut_node, dut_if)
+ ssh = SSH()
+ ssh.connect(dut_node)
+ if is_ipv4:
+ cmd = 'cd {0}/{4} && ./run_tldk.sh {0}/{5}/{2}_rx.pcap ' \
+ '{0}/{5}/{2}_tx.pcap {1} {0}/{5}/{2}_fe.cfg ' \
+ '{0}/{5}/{2}_be.cfg {3} NONE' \
+ .format(con.REMOTE_FW_DIR, pci_address, file_prefix, \
+ dest_ip, con.TLDK_SCRIPTS, con.TLDK_TESTCONFIG)
+ else:
+ cmd = 'cd {0}/{4} && ./run_tldk.sh {0}/{5}/{2}_rx.pcap ' \
+ '{0}/{5}/{2}_tx.pcap {1} {0}/{5}/{2}_fe.cfg ' \
+ '{0}/{5}/{2}_be.cfg NONE {3}' \
+ .format(con.REMOTE_FW_DIR, pci_address, file_prefix, \
+ dest_ip, con.TLDK_SCRIPTS, con.TLDK_TESTCONFIG)
+
+ (ret_code, _, _) = ssh.exec_command(cmd, timeout=600)
+ if ret_code != 0:
+ raise RuntimeError('Failed to execute udpfwd test at node {0}'
+ .format(dut_node['host']))
+
+ @staticmethod
+ def get_the_test_result(dut_node, file_prefix):
+ """
+ After execute the udpfwd cmd, use this to get the test result.
+
+ :param dut_node: will get the test result in this dut node
+ :param dut_if: the dut interface name
+ :param file_prefix: the test case output file prefix
+ :type dut_node: dice
+ :type dut_if: str
+ :type file_prefix: str
+ :returns: str.
+ :rtype: str
+ :raises RuntimeError: If failed to get the test result.
+ """
+ ssh = SSH()
+ ssh.connect(dut_node)
+ cmd = 'cd {0}; tcpdump -nnnn -vvv -r ./{2}/{1}_tx.pcap | ' \
+ 'grep \'udp sum ok\' | wc -l' \
+ .format(con.REMOTE_FW_DIR, file_prefix, con.TLDK_TESTCONFIG)
+
+ (ret_code, stdout, _) = ssh.exec_command(cmd, timeout=100)
+ if ret_code != 0:
+ raise RuntimeError('Failed to get test result at node {0}'
+ .format(dut_node['host']))
+
+ return stdout
diff --git a/resources/libraries/python/TLDK/__init__.py b/resources/libraries/python/TLDK/__init__.py
new file mode 100644
index 0000000000..9cb1aeee44
--- /dev/null
+++ b/resources/libraries/python/TLDK/__init__.py
@@ -0,0 +1,16 @@
+# Copyright (c) 2017 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+__init__ file for directory resources/libraries/python/TLDK
+"""
diff --git a/resources/libraries/python/TLDK/gen_pcap.py b/resources/libraries/python/TLDK/gen_pcap.py
new file mode 100644
index 0000000000..bd9d2b1743
--- /dev/null
+++ b/resources/libraries/python/TLDK/gen_pcap.py
@@ -0,0 +1,100 @@
+#! /usr/bin/python
+# Copyright (c) 2017 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+This module is used to generate pcap file used to execute UDP test cases.
+"""
+
+from scapy.layers.inet import Ether, IP, UDP, fragment
+from scapy.layers.inet6 import IPv6
+from scapy.utils import PcapWriter
+from resources.libraries.python.TLDK.TLDKConstants import TLDKConstants as con
+
+def create_packet(psz, is_ipv6, frag_size=None):
+ """Create a packet to use scapy send to DUT."""
+ if is_ipv6 != True:
+ packet = Ether()/IP()/UDP()/("X" * psz)
+ packet[IP].src = "192.168.1.56"
+ packet[IP].dst = "192.168.1.233"
+ else:
+ packet = Ether()/IPv6()/UDP()/("X" * psz)
+ packet[IPv6].src = "2001:4860:b002::56"
+ packet[IPv6].dst = "2001:4860:b002::28"
+ packet[Ether].src = "DE:AD:BE:EF:02:01"
+ packet[Ether].dst = "DE:AD:BE:EF:01:02"
+ packet[UDP].sport = 1111
+ packet[UDP].dport = 32768
+ if frag_size != None:
+ packet = fragment(packet, fragsize=frag_size)
+ return packet
+
+def gen_ipv4_checksum_pcap():
+ """Generate ipv4 checksum test case input pcap file."""
+ writer = PcapWriter(con.TLDK_TESTCONFIG + "/test_ipv4_checksum_rx.pcap",
+ append=False)
+ for i in range(1, 1474):
+ packets = create_packet(i, False)
+ for packet in packets:
+ writer.write(packet)
+ writer.close()
+
+def gen_ipv6_checksum_pcap():
+ """Generate ipv6 checksum test case input pcap file."""
+ writer = PcapWriter(con.TLDK_TESTCONFIG + "/test_ipv6_checksum_rx.pcap",
+ append=False)
+ for i in range(1, 1454):
+ packets = create_packet(i, True)
+ for packet in packets:
+ writer.write(packet)
+ writer.close()
+
+def gen_ipv4_fragment_pcap():
+ """Generate ipv4 fragment test case input pcap file."""
+ writer = PcapWriter(con.TLDK_TESTCONFIG + "/test_ipv4_fragment_rx.pcap",
+ append=False)
+ for i in range(1, 1474):
+ packets = create_packet(i, False)
+ for packet in packets:
+ writer.write(packet)
+ writer.close()
+
+def gen_ipv6_fragment_pcap():
+ """Generate ipv6 fragment test case input pcap file."""
+ writer = PcapWriter(con.TLDK_TESTCONFIG + "/test_ipv6_fragment_rx.pcap",
+ append=False)
+ for i in range(1, 1454):
+ packets = create_packet(i, True)
+ for packet in packets:
+ writer.write(packet)
+ writer.close()
+
+def gen_ipv4_assemble_pcap():
+ """Generate ipv4 assemble test case input pcap file."""
+ writer = PcapWriter(con.TLDK_TESTCONFIG + "/test_ipv4_assemble_rx.pcap",
+ append=False)
+ packets = create_packet(1066, False, 1024)
+ for packet in packets:
+ writer.write(packet)
+ writer.close()
+
+def gen_all_pcap():
+ """Generate all test cases input pcap file."""
+ gen_ipv4_checksum_pcap()
+ gen_ipv6_checksum_pcap()
+ gen_ipv4_fragment_pcap()
+ gen_ipv6_fragment_pcap()
+ gen_ipv4_assemble_pcap()
+
+if __name__ == "__main__":
+ gen_all_pcap()
diff --git a/resources/libraries/robot/TLDK/TLDKUtils.robot b/resources/libraries/robot/TLDK/TLDKUtils.robot
new file mode 100644
index 0000000000..75e982252c
--- /dev/null
+++ b/resources/libraries/robot/TLDK/TLDKUtils.robot
@@ -0,0 +1,80 @@
+# Copyright (c) 2017 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+| Library | resources.libraries.python.NodePath
+| Documentation | *Utilities for the path computing, pcap reading*
+| ...
+| ... | Utilities for the path computing, pcap file reading and also the port
+| ... | selection.
+
+*** Keywords ***
+| Path for 2-node testing is set
+| | [Documentation] | Compute the path for the 2 node testing.
+| | ...
+| | ... | *Arguments:*
+| | ... | - tg_node - TG node. Type: dictionary
+| | ... | - dut_node - DUT node. Type: dictionary
+| | ...
+| | ... | *Return:*
+| | ... | - No value returned.
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Path for 2-node testing is set \| ${nodes['TG']} \
+| | ... | \| ${nodes['DUT1'] \|
+| | ...
+| | [Arguments] | ${tg_node} | ${dut_node}
+| | Append Nodes | ${tg_node} | ${dut_node}
+| | Compute Path
+
+| Pick out the port used to execute test
+| | [Documentation] | Pick out the port used to execute the test.
+| | ...
+| | ... | *Arguments:*
+| | ... | - No arguments.
+| | ...
+| | ... | *Return:*
+| | ... | - No value returned.
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Pick out the port used to execute test \|
+| | ...
+| | ${tg_port} | ${tg_node}= | First Interface
+| | ${dut_port} | ${dut_node}= | Last Interface
+| | set suite variable | ${tg_node}
+| | set suite variable | ${dut_node}
+| | set suite variable | ${tg_port}
+| | set suite variable | ${dut_port}
+
+| Get the pcap data
+| | [Documentation] | Get the pcap file detailed data.
+| | ...
+| | ... | *Arguments:*
+| | ... | - file_prefix - file prefix. Type: dictionary
+| | ...
+| | ... | *Return:*
+| | ... | - packet_num, dest_ip, is_ipv4 - a tuple of packet_num
+| | ... | dest_ip, is_ipv4. Type: tuple(int, str, bool)
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Get the pcap data \| ${tc01_file_prefix} \|
+| | ...
+| | [Arguments] | ${file_prefix}
+| | ${packet_num} | ${dest_ip} | ${is_ipv4}= | Get Pcap Info
+| | ... | ${file_prefix}
+| | set suite variable | ${packet_num}
+| | set suite variable | ${dest_ip}
+| | set suite variable | ${is_ipv4}