Re: [dts] [PATCH v2]tests: add checksum offload and tso test scripts test_plans: add test plan for checksum offload and tso

["Pei, Yulong" <yulong.pei@intel.com>]

Hi  Lijuan,

1. I only saw "checksum on the transmit packet" test, where is  "checksum on the receive packet" test ?
2. where is tso test plan ?

Best  Regards
Yulong Pei

-----Original Message-----
From: Tu, LijuanX A 
Sent: Thursday, February 18, 2016 1:36 PM
To: dts@dpdk.org; Xu, Qian Q <qian.q.xu@intel.com>; Pei, Yulong <yulong.pei@intel.com>
Cc: Lijuan Tu <lijuanx.tu.a@intel.com>; Tu, LijuanX A <lijuanx.a.tu@intel.com>
Subject: [dts][PATCH v2]tests: add checksum offload and tso test scripts test_plans: add test plan for checksum offload and tso

From: Lijuan Tu <lijuanx.tu.a@intel.com>

Signed-off-by: Lijuan Tu <lijuanx.a.tu@intel.com>
---
 test_plans/vf_offload.rst     | 178 ++++++++++++++++++++
 tests/TestSuite_vf_offload.py | 369 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 547 insertions(+)
 create mode 100644 test_plans/vf_offload.rst  create mode 100644 tests/TestSuite_vf_offload.py

diff --git a/test_plans/vf_offload.rst b/test_plans/vf_offload.rst new file mode 100644 index 0000000..38956e6
--- /dev/null
+++ b/test_plans/vf_offload.rst
@@ -0,0 +1,178 @@
+Prerequisites
+=========================================
+
+
+Create Two VF interfaces from two kernel PF ineterfaces, and then attach them to VM.
+Start testpmd on vm::
+
+
+    ./x86_64-native-linuxapp-gcc/app/testpmd -c 0x7 -n 1  -- -i 
+    --portmask=0x1 --enable-rx-cksum --txqflags=0
+    --crc-strip --port-topology=loop
+
+
+Test Case: Insert IPv4/IPv6 UDP/TCP/SCTP checksum on the transmit 
+packet 
+=======================================================================
+=
+
+Setup the ``csum`` forwarding mode::
+
+  testpmd> set fwd csum
+  Set csum packet forwarding mode
+
+Enable the IPv4/UDP/TCP/SCTP checksum offload on port 0::
+
+  testpmd> tx_checksum set 0xf 0
+  testpmd> start
+    csum packet forwarding - CRC stripping disabled - packets/burst=32
+    nb forwarding cores=1 - nb forwarding ports=10
+    RX queues=1 - RX desc=128 - RX free threshold=64
+    RX threshold registers: pthresh=8 hthresh=8 wthresh=4
+    TX queues=1 - TX desc=512 - TX free threshold=0
+    TX threshold registers: pthresh=32 hthresh=8 wthresh=8
+
+Configure the traffic generator to send the multiple packets for the 
+following
+combination: IPv4/UDP, IPv4/TCP, IPv4/SCTP, IPv6/UDP, IPv6/TCP.
+
+Except that SCTP header + payload length must be a multiple of 4 bytes.
+IPv4 + UDP/TCP packet length can range from the minimum length to 1518 bytes.
+
+Then verify that the same number of packet are correctly received on 
+the traffic generator side. And IPv4 checksum, TCP checksum, UDP 
+checksum, SCTP CRC32c need be validated as pass by the IXIA.
+
+The IPv4 source address will not be changed by testpmd.
+
+
+Test Case: Do not insert IPv4/IPv6 UDP/TCP checksum on the transmit 
+packet 
+=======================================================================
+===
+
+Setup the ``csum`` forwarding mode::
+
+  testpmd> set fwd csum
+  Set csum packet forwarding mode
+
+Disable the IPv4/UDP/TCP/SCTP checksum offload on port 0::
+
+  testpmd> tx_checksum set 0x0 0
+  testpmd> start
+    csum packet forwarding - CRC stripping disabled - packets/burst=32
+    nb forwarding cores=1 - nb forwarding ports=10
+    RX queues=1 - RX desc=128 - RX free threshold=64
+    RX threshold registers: pthresh=8 hthresh=8 wthresh=4
+    TX queues=1 - TX desc=512 - TX free threshold=0
+    TX threshold registers: pthresh=32 hthresh=8 wthresh=8
+
+Configure the traffic generator to send the multiple packets for the 
+follwing
+combination: IPv4/UDP, IPv4/TCP, IPv6/UDP, IPv6/TCP.
+
+IPv4 + UDP/TCP packet length can range from the minimum length to 1518 bytes.
+
+Then verify that the same number of packet are correctly received on 
+the traffic generator side. And IPv4 checksum, TCP checksum, UDP 
+checksum need be validated as pass by the IXIA.
+
+The first byte of source IPv4 address will be increment by testpmd. The 
+checksum is indeed recalculated by software algorithms.
+
+
+
+
+If you start vm by manual ,you can refer to below commands Suppose PF 
+is 0000:04:00.0. Generate 2VFs using commands below and make them in pci-stub mods.
+
+1. Get the pci device id of DUT::
+
+    ./dpdk_nic_bind.py --st
+    0000:04:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' 
+ if=ens261f0 drv=ixgbe unused=igb_uio
+
+2. Create 2 VFs from 2 PFs::
+
+    echo 2 > /sys/bus/pci/devices/0000\:04\:00.0/sriov_numvfs
+
+VFs 04:10.0 & 04:10.1 have been created::
+
+    ./dpdk_nic_bind.py --st
+    0000:04:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' if=ens261f0 drv=ixgbe unused=
+    0000:04:10.0 '82599 Ethernet Controller Virtual Function' if=enp4s16 drv=ixgbevf unused=
+    0000:04:10.1 '82599 Ethernet Controller Virtual Function' 
+ if=enp4s16f1 drv=ixgbevf unused=
+
+3. detach VFs from the host, bind them to pci-stub driver::
+
+    /sbin/modprobe pci-stub
+    echo "8086 10ed" > /sys/bus/pci/drivers/pci-stub/new_id
+    echo 0000:04:10.0 > /sys/bus/pci/devices/0000\:04\:10.0/driver/unbind
+    echo 0000:04:10.0 > /sys/bus/pci/drivers/pci-stub/bind
+    echo 0000:04:10.1 > /sys/bus/pci/devices/0000\:04\:10.1/driver/unbind
+    echo 0000:04:10.1 > /sys/bus/pci/drivers/pci-stub/bind
+
+or using the following more easy way::
+
+    ./dpdk_nic_bind.py -b pci-stub 04:10.0 04:10.1
+
+it can be seen that VFs 04:10.0 & 04:10.1 's drv is pci-stub::
+
+    ./dpdk_nic_bind.py --st
+    0000:04:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' if=ens261f0 drv=ixgbe unused=vfio-pci
+    0000:04:10.0 '82599 Ethernet Controller Virtual Function' if= drv=pci-stub unused=ixgbevf,vfio-pci
+    0000:04:10.1 '82599 Ethernet Controller Virtual Function' if= 
+ drv=pci-stub unused=ixgbevf,vfio-pci
+
+4. Do not forget bring up PFs::
+
+    ifconfig ens261f0 up
+
+Passthrough VFs 04:10.0 & 04:10.1 to vm0, and start vm0, you can refer to below command::
+
+    taskset -c 6-12 qemu-system-x86_64 \
+    -enable-kvm -m 8192  -smp 6 -cpu host -name dpdk15-vm1 \
+    -drive file=/home/image/fedora23.img \
+    -netdev tap,id=hostnet1,ifname=tap1,script=/etc/qemu-ifup,vhost=on \
+    -device rtl8139,netdev=hostnet1,id=net1,mac=52:54:01:6b:10:61,bus=pci.0,addr=0xa \
+    -device pci-assign,bus=pci.0,addr=0x6,host=04:10.0 \
+    -device pci-assign,bus=pci.0,addr=0x7,host=04:10.1 \
+    -vnc :11 -daemonize
+
+the /etc/qemu-ifup can be below script, need you to create first::
+
+    #!/bin/sh
+    set -x
+    switch=br0
+    if [ -n "$1" ];then
+        /usr/sbin/tunctl -u `whoami` -t $1
+        /sbin/ip link set $1 up
+        sleep 0.5s
+        /usr/sbin/brctl addif $switch $1
+        exit 0
+    else
+        echo "Error: no interface specified"
+    exit 1
+    fi
+
+Set up bridge br0 before create /etc/qemu-ifup, for example::
+
+    cd /etc/sysconfig/network-scripts
+    vim ifcfg-enp1s0f0
+
+    HWADDR=00:1e:67:fb:0f:d4
+    TYPE=Ethernet
+    NAME=enp1s0f0
+    ONBOOT=yes
+    DEVICE=enp1s0f0
+    NM_CONTROLLED=no
+    BRIDGE=br0
+
+    vim ifcfg-br0
+    TYPE=Bridge
+    DEVICE=br0
+    ONBOOT=yes
+    NM_CONTROLLED=no
+    BOOTPROTO=dhcp
+    HOSTNAME="dpdk-test58"
+
+Login vm0, got VFs pci device id in vm0, assume they are 00:06.0 & 
+00:07.0, bind them to igb_uio driver, and then start testpmd, set it in 
+mac forward mode::
+
+    ./tools/dpdk_nic_bind.py --bind=igb_uio 00:06.0 00:07.0
+    ./x86_64-native-linuxapp-gcc/app/testpmd -c 0x0f -n 4 -- -i
+    testpmd-> set fwd mac
+    testpmd-> start
diff --git a/tests/TestSuite_vf_offload.py b/tests/TestSuite_vf_offload.py new file mode 100644 index 0000000..ccae3c6
--- /dev/null
+++ b/tests/TestSuite_vf_offload.py
@@ -0,0 +1,369 @@
+# <COPYRIGHT_TAG>
+
+import re
+import time
+
+import dts
+from qemu_kvm import QEMUKvm
+from test_case import TestCase
+from pmd_output import PmdOutput
+from utils import RED, GREEN
+from net_device import NetDevice
+from crb import Crb
+from scapy.all import *
+from settings import HEADER_SIZE
+VM_CORES_MASK = 'all'
+
+class TestVfOffload(TestCase):
+
+    def set_up_all(self):
+        self.dut_ports = self.dut.get_ports(self.nic)
+        self.verify(len(self.dut_ports) > 1, "Insufficient ports")
+        self.vm0 = None
+        self.setup_2pf_2vf_1vm_env_flag = 0
+        self.setup_2pf_2vf_1vm_env(driver='')
+        self.vm0_dut_ports = self.vm_dut_0.get_ports('any')
+        self.portMask = dts.create_mask([self.vm0_dut_ports[0]])
+        self.vm0_testpmd = PmdOutput(self.vm_dut_0)
+
+    def set_up(self):
+        pass
+
+    def setup_2pf_2vf_1vm_env(self, driver='default'):
+
+        self.used_dut_port_0 = self.dut_ports[0]
+        self.dut.generate_sriov_vfs_by_port(self.used_dut_port_0, 1, driver=driver)
+        self.sriov_vfs_port_0 = self.dut.ports_info[self.used_dut_port_0]['vfs_port']
+        self.used_dut_port_1 = self.dut_ports[1]
+        self.dut.generate_sriov_vfs_by_port(self.used_dut_port_1, 1, driver=driver)
+        self.sriov_vfs_port_1 = 
+ self.dut.ports_info[self.used_dut_port_1]['vfs_port']
+
+        try:
+
+            for port in self.sriov_vfs_port_0:
+                port.bind_driver('pci-stub')
+
+            for port in self.sriov_vfs_port_1:
+                port.bind_driver('pci-stub')
+
+            time.sleep(1)
+            vf0_prop = {'opt_host': self.sriov_vfs_port_0[0].pci}
+            vf1_prop = {'opt_host': self.sriov_vfs_port_1[0].pci}
+
+            if driver == 'igb_uio':
+                # start testpmd without the two VFs on the host
+                self.host_testpmd = PmdOutput(self.dut)
+                eal_param = '-b %(vf0)s -b %(vf1)s' % {'vf0': self.sriov_vfs_port_0[0].pci,
+                                                       'vf1': self.sriov_vfs_port_1[0].pci}
+                self.host_testpmd.start_testpmd("1S/2C/2T", 
+ eal_param=eal_param)
+
+            # set up VM0 ENV
+            self.vm0 = QEMUKvm(self.dut, 'vm0', 'vf_port_start_stop')
+            self.vm0.set_vm_device(driver='pci-assign', **vf0_prop)
+            self.vm0.set_vm_device(driver='pci-assign', **vf1_prop)
+            self.vm_dut_0 = self.vm0.start()
+            if self.vm_dut_0 is None:
+                raise Exception("Set up VM0 ENV failed!")
+
+            self.setup_2pf_2vf_1vm_env_flag = 1
+        except Exception as e:
+            self.destroy_2pf_2vf_1vm_env()
+            raise Exception(e)
+
+    def destroy_2pf_2vf_1vm_env(self):
+        if getattr(self, 'vm0', None):
+            #destroy testpmd in vm0
+            self.vm0_testpmd.execute_cmd('stop')
+            self.vm0_testpmd.execute_cmd('quit', '# ')
+            self.vm0_testpmd = None
+            self.vm0_dut_ports = None
+            #destroy vm0
+            self.vm0.stop()
+            self.vm0 = None
+
+        if getattr(self, 'host_testpmd', None):
+            self.host_testpmd.execute_cmd('quit', '# ')
+            self.host_testpmd = None
+
+        if getattr(self, 'used_dut_port_0', None):
+            self.dut.destroy_sriov_vfs_by_port(self.used_dut_port_0)
+            port = self.dut.ports_info[self.used_dut_port_0]['port']
+            port.bind_driver()
+            self.used_dut_port_0 = None
+
+        if getattr(self, 'used_dut_port_1', None):
+            self.dut.destroy_sriov_vfs_by_port(self.used_dut_port_1)
+            port = self.dut.ports_info[self.used_dut_port_1]['port']
+            port.bind_driver()
+            self.used_dut_port_1 = None
+
+        for port_id in self.dut_ports:
+            port = self.dut.ports_info[port_id]['port']
+            port.bind_driver()
+
+        self.setup_2pf_2vf_1vm_env_flag = 0
+
+    def checksum_enablehw(self, port, dut):
+        dut.send_expect("csum set ip hw %d" % port, "testpmd>")
+        dut.send_expect("csum set udp hw %d" % port, "testpmd>")
+        dut.send_expect("csum set tcp hw %d" % port, "testpmd>")
+        dut.send_expect("csum set sctp hw %d" % port, "testpmd>")
+
+    def checksum_enablesw(self, port, dut):
+        dut.send_expect("csum set ip sw %d" % port, "testpmd>")
+        dut.send_expect("csum set udp sw %d" % port, "testpmd>")
+        dut.send_expect("csum set tcp sw %d" % port, "testpmd>")
+        dut.send_expect("csum set sctp sw %d" % port, "testpmd>")
+
+    def checksum_validate(self, packets_sent, packets_expected):
+        """
+        Validate the checksum.
+        """
+        tx_interface = self.tester.get_interface(self.tester.get_local_port(self.dut_ports[0]))
+        rx_interface = 
+ self.tester.get_interface(self.tester.get_local_port(self.dut_ports[0]
+ ))
+
+        sniff_src = self.vm0_testpmd.get_port_mac(0)
+        checksum_pattern = re.compile("chksum.*=.*(0x[0-9a-z]+)")
+
+        chksum = dict()
+        result = dict()
+
+        self.tester.send_expect("scapy", ">>> ")
+
+        for packet_type in packets_expected.keys():
+            self.tester.send_expect("p = %s" % packets_expected[packet_type], ">>>")
+            out = self.tester.send_expect("p.show2()", ">>>")
+            chksums = checksum_pattern.findall(out)
+            chksum[packet_type] = chksums
+            print packet_type, ": ", chksums
+
+        self.tester.send_expect("exit()", "#")
+
+        self.tester.scapy_background()
+        self.tester.scapy_append('p = sniff(filter="ether src %s", iface="%s", count=%d)' % (sniff_src, rx_interface, len(packets_sent)))
+        self.tester.scapy_append('nr_packets=len(p)')
+        self.tester.scapy_append('reslist = [p[i].sprintf("%IP.chksum%;%TCP.chksum%;%UDP.chksum%;%SCTP.chksum%") for i in range(nr_packets)]')
+        self.tester.scapy_append('import string')
+        self.tester.scapy_append('RESULT = string.join(reslist, ",")')
+
+        # Send packet.
+        self.tester.scapy_foreground()
+
+        for packet_type in packets_sent.keys():
+            self.tester.scapy_append('sendp([%s], iface="%s")' % 
+ (packets_sent[packet_type], tx_interface))
+
+        self.tester.scapy_execute()
+        out = self.tester.scapy_get_result()
+        packets_received = out.split(',')
+        self.verify(len(packets_sent) == len(packets_received), 
+ "Unexpected Packets Drop")
+
+        for packet_received in packets_received:
+            ip_checksum, tcp_checksum, udp_checksup, sctp_checksum = packet_received.split(';')
+            print "ip_checksum: ", ip_checksum, "tcp_checksum:, ", 
+ tcp_checksum, "udp_checksup: ", udp_checksup, "sctp_checksum: ", 
+ sctp_checksum
+
+            packet_type = ''
+            l4_checksum = ''
+            if tcp_checksum != '??':
+                packet_type = 'TCP'
+                l4_checksum = tcp_checksum
+            elif udp_checksup != '??':
+                packet_type = 'UDP'
+                l4_checksum = udp_checksup
+            elif sctp_checksum != '??':
+                packet_type = 'SCTP'
+                l4_checksum = sctp_checksum
+
+            if ip_checksum != '??':
+                packet_type = 'IP/' + packet_type
+                if chksum[packet_type] != [ip_checksum, l4_checksum]:
+                    result[packet_type] = packet_type + " checksum error"
+            else:
+                packet_type = 'IPv6/' + packet_type
+                if chksum[packet_type] != [l4_checksum]:
+                    result[packet_type] = packet_type + " checksum error"
+
+        return result
+
+    def test_checksum_offload_enable(self):
+        """
+        Insert IPv4/IPv6 UDP/TCP/SCTP checksum on the transmit packet.
+        Enable Checksum offload.
+        Verify that the same number of packet are correctly received on the
+        traffic generator side.
+        """
+        self.vm0_testpmd.start_testpmd(VM_CORES_MASK, "--portmask=%s " %
+                                      (self.portMask) + "--disable-hw-vlan --enable-rx-cksum " + "--txqflags=0 " +
+                                      "--crc-strip --port-topology=loop")
+        self.vm0_testpmd.execute_cmd('set fwd csum')
+
+        time.sleep(2)
+
+        mac = self.vm0_testpmd.get_port_mac(0)
+
+        pkts = {'IP/UDP': 'Ether(dst="%s", src="52:00:00:00:00:00")/IP(chksum=0x0)/UDP(chksum=0xf)/("X"*46)' % mac,
+                'IP/TCP': 'Ether(dst="%s", src="52:00:00:00:00:00")/IP(chksum=0x0)/TCP(chksum=0xf)/("X"*46)' % mac,
+                'IP/SCTP': 'Ether(dst="%s", src="52:00:00:00:00:00")/IP(chksum=0x0)/SCTP(chksum=0xf)/("X"*48)' % mac,
+                'IPv6/UDP': 'Ether(dst="%s", src="52:00:00:00:00:00")/IPv6(src="::1")/UDP(chksum=0xf)/("X"*46)' % mac,
+                'IPv6/TCP': 'Ether(dst="%s", 
+ src="52:00:00:00:00:00")/IPv6(src="::1")/TCP(chksum=0xf)/("X"*46)' % 
+ mac}
+
+        pkts_ref = {'IP/UDP': 'Ether(dst="02:00:00:00:00:00", src="%s")/IP(src="127.0.0.2")/UDP()/("X"*46)' % mac,
+                    'IP/TCP': 'Ether(dst="02:00:00:00:00:00", src="%s")/IP(src="127.0.0.2")/TCP()/("X"*46)' % mac,
+                    'IP/SCTP': 'Ether(dst="02:00:00:00:00:00", src="%s")/IP(src="127.0.0.2")/SCTP()/("X"*48)' % mac,
+                    'IPv6/UDP': 'Ether(dst="02:00:00:00:00:00", src="%s")/IPv6(src="::2")/UDP()/("X"*46)' % mac,
+                    'IPv6/TCP': 'Ether(dst="02:00:00:00:00:00", 
+ src="%s")/IPv6(src="::2")/TCP()/("X"*46)' % mac}
+
+        if self.nic in ['redrockcanyou', 'atwood']:
+            del pkts['IP/SCTP']
+            del pkts_ref['IP/SCTP']
+
+        self.checksum_enablehw(0,self.vm_dut_0)
+
+        self.vm0_testpmd.execute_cmd('start')
+        result = self.checksum_validate(pkts, pkts_ref)
+        self.vm0_testpmd.execute_cmd('stop')
+
+        self.verify(len(result) == 0, string.join(result.values(), 
+ ","))
+
+    def _test_checksum_offload_disable(self):
+        """
+        Do not insert IPv4/IPv6 UDP/TCP checksum on the transmit packet.
+        Disable Checksum offload.
+        Verify that the same number of packet are correctly received on
+        the traffic generator side.
+        """
+
+        self.vm0_testpmd.start_testpmd(VM_CORES_MASK, "--portmask=%s " %
+                                      (self.portMask) + "--disable-hw-vlan --enable-rx-cksum " +
+                                      "--crc-strip --port-topology=loop")
+        self.vm0_testpmd.execute_cmd('set fwd csum')
+
+        time.sleep(2)
+
+
+        mac = self.vm0_testpmd.get_port_mac(0)
+        sndIP = '10.0.0.1'
+        sndIPv6 = '::1'
+        sndPkts = {'IP/UDP': 'Ether(dst="%s", src="52:00:00:00:00:00")/IP(src="%s",chksum=0x0)/UDP(chksum=0xf)/("X"*46)' % (mac, sndIP),
+                   'IP/TCP': 'Ether(dst="%s", src="52:00:00:00:00:00")/IP(src="%s",chksum=0x0)/TCP(chksum=0xf)/("X"*46)' % (mac, sndIP),
+                   'IPv6/UDP': 'Ether(dst="%s", src="52:00:00:00:00:00")/IPv6(src="%s")/UDP(chksum=0xf)/("X"*46)' % (mac, sndIPv6),
+                   'IPv6/TCP': 'Ether(dst="%s", 
+ src="52:00:00:00:00:00")/IPv6(src="%s")/TCP(chksum=0xf)/("X"*46)' % 
+ (mac, sndIPv6)}
+
+        expIP = "10.0.0.2"
+        expIPv6 = '::2'
+        expPkts = {'IP/UDP': 'Ether(dst="02:00:00:00:00:00", src="%s")/IP(src="%s")/UDP()/("X"*46)' % (mac, expIP),
+                   'IP/TCP': 'Ether(dst="02:00:00:00:00:00", src="%s")/IP(src="%s")/TCP()/("X"*46)' % (mac, expIP),
+                   'IPv6/UDP': 'Ether(dst="02:00:00:00:00:00", src="%s")/IPv6(src="%s")/UDP()/("X"*46)' % (mac, expIPv6),
+                   'IPv6/TCP': 'Ether(dst="02:00:00:00:00:00", 
+ src="%s")/IPv6(src="%s")/TCP()/("X"*46)' % (mac, expIPv6)}
+
+        self.vm0_testpmd.execute_cmd('start')
+        result = self.checksum_validate(sndPkts, expPkts)
+        self.vm0_testpmd.execute_cmd('stop')
+
+        self.verify(len(result) == 0, string.join(result.values(), 
+ ","))
+
+    def tcpdump_start_sniffing(self, ifaces=[]):
+        """
+        Starts tcpdump in the background to sniff the tester interface where
+        the packets are transmitted to and from the self.dut.
+        All the captured packets are going to be stored in a file for a
+        post-analysis.
+        """
+
+        for iface in ifaces:
+            command = ('tcpdump -w tcpdump_{0}.pcap -i {0} 2>tcpdump_{0}.out &').format(iface)
+            self.tester.send_expect('rm -f tcpdump_{0}.pcap', '#').format(iface)
+            self.tester.send_expect(command, '#')
+
+    def tcpdump_stop_sniff(self):
+        """
+        Stops the tcpdump process running in the background.
+        """
+        self.tester.send_expect('killall tcpdump', '#')
+        time.sleep(1)
+        self.tester.send_expect('echo "Cleaning buffer"', '#')
+        time.sleep(1)
+
+    def tcpdump_command(self, command):
+        """
+        Sends a tcpdump related command and returns an integer from the output
+        """
+
+        result = self.tester.send_expect(command, '#')
+        print result
+        return int(result.strip())
+
+    def number_of_packets(self, iface):
+        """
+        By reading the file generated by tcpdump it counts how many packets were
+        forwarded by the sample app and received in the self.tester. The sample app
+        will add a known MAC address for the test to look for.
+        """
+
+        command = ('tcpdump -A -nn -e -v -r tcpdump_{iface}.pcap 2>/dev/null | ' +
+                   'grep -c "seq"')
+        return self.tcpdump_command(command.format(**locals()))
+
+    def test_tso(self):
+        """
+        TSO IPv4 TCP, IPv6 TCP, VXLan testing
+        """
+        import pdb
+        pdb.set_trace()
+        tx_interface = self.tester.get_interface(self.tester.get_local_port(self.dut_ports[0]))
+        rx_interface = 
+ self.tester.get_interface(self.tester.get_local_port(self.dut_ports[1]
+ ))
+
+        self.frame_sizes = [128, 1458]
+        self.headers_size = HEADER_SIZE['eth'] + HEADER_SIZE['ip'] + HEADER_SIZE['tcp']
+        padding = self.frame_sizes[0] - self.headers_size
+
+        self.tester.send_expect("ethtool -K %s rx off tx off tso off gso off gro off lro off" % tx_interface, "# ")
+        self.tester.send_expect("ip l set %s up" % tx_interface, "# ")
+
+        self.portMask = dts.create_mask([self.vm0_dut_ports[0]])
+        self.vm0_testpmd.start_testpmd(VM_CORES_MASK, "--portmask=%s " %
+                                      (self.portMask) + "--enable-rx-cksum " +
+                                      "--txqflags=0 " + 
+                                      "--crc-strip 
+ --port-topology=loop")
+
+        mac = self.vm0_testpmd.get_port_mac(0)
+
+        self.checksum_enablehw(0,self.vm_dut_0)
+        self.vm0_testpmd.execute_cmd("tso set 800 %d" % self.vm0_dut_ports[1])
+        self.vm0_testpmd.execute_cmd("set fwd csum")
+        self.vm0_testpmd.execute_cmd("start")
+
+        self.tester.scapy_foreground()
+        time.sleep(5)
+
+        # IPv4 tcp test
+
+        self.tcpdump_start_sniffing([tx_interface, rx_interface])
+        self.tester.scapy_append('sendp([Ether(dst="%s",src="52:00:00:00:00:00")/IP(src="192.168.1.1",dst="192.168.1.2")/TCP(sport=1021,dport=1021)/("X"*%s)], iface="%s")' % (mac, padding, tx_interface))
+        out = self.tester.scapy_execute()
+        out = self.vm0_testpmd.execute_cmd("show port stats all")
+        print out
+        self.tcpdump_stop_sniff()
+        rx_stats = self.number_of_packets(rx_interface)
+        if (rx_stats == 2):
+            self.verify(1, "Pass")
+
+        # IPv6 tcp test
+
+        self.tcpdump_start_sniffing([tx_interface, rx_interface])
+        self.tester.scapy_append('sendp([Ether(dst="%s", src="52:00:00:00:00:00")/IPv6(src="FE80:0:0:0:200:1FF:FE00:200", dst="3555:5555:6666:6666:7777:7777:8888:8888")/TCP(sport=1021,dport=1021)/("X"*%s)], iface="%s")' % (mac, padding, tx_interface))
+        out = self.tester.scapy_execute()
+        out = self.vm0_testpmd.execute_cmd("show port stats all")
+        print out
+        self.tcpdump_stop_sniff()
+        rx_stats = self.number_of_packets(rx_interface)
+        if (rx_stats == 2):
+            self.verify(1, "Pass")
+
+
+    def tear_down(self):
+         pass
+
+    def tear_down_all(self):
+        print "tear_down_all"
+        if self.setup_2pf_2vf_1vm_env_flag == 1:
+            self.destroy_2pf_2vf_1vm_env()
--
2.5.0