[dts] [PATCH V2] Use tcpdump_sniff_packets instead of sniff method

[Tu, Lijuan]

Applied V2, and supersede V1, thanks

> -----Original Message-----
> From: dts [mailto:dts-bounces at dpdk.org] On Behalf Of lihong
> Sent: Tuesday, December 11, 2018 2:24 AM
> To: dts at dpdk.org
> Cc: Ma, LihongX <lihongx.ma at intel.com>
> Subject: [dts] [PATCH V2] Use tcpdump_sniff_packets instead of sniff
> method
> 
> The sniff method may not work well when add filter ether arguments, so use
> tcpdump_sniff_packets instead of it.
> 
> Signed-off-by: lihong <lihongx.ma at intel.com>
> ---
>  tests/TestSuite_short_live.py | 9 ++++-----
>  tests/TestSuite_vxlan.py      | 8 +++-----
>  2 files changed, 7 insertions(+), 10 deletions(-)
> 
> diff --git a/tests/TestSuite_short_live.py b/tests/TestSuite_short_live.py
> index ca3643f..b3ec131 100644
> --- a/tests/TestSuite_short_live.py
> +++ b/tests/TestSuite_short_live.py
> @@ -102,10 +102,7 @@ class TestShortLiveApp(TestCase):
>          if (txPort == rxPort):
>              count = 2
> 
> -        self.tester.scapy_append('p=sniff(iface="%s",
> filter="ether[12:2]!=0x88cc", count=%d, timeout=5)' % (rxitf, count))
> -        self.tester.scapy_append('RESULT=str(p[%d].show)' % (count-1))
> -
> -        self.tester.scapy_foreground()
> +        inst = self.tester.tcpdump_sniff_packets(rxitf, count=count,
> + timeout=5)
> 
>          pktlen = pktSize - 14
>          padding = pktlen - 20
> @@ -114,7 +111,9 @@ class TestShortLiveApp(TestCase):
>          self.tester.scapy_execute()
>          time.sleep(3)
> 
> -        out = self.tester.scapy_get_result()
> +        pkts = self.tester.load_tcpdump_sniff_packets(inst)
> +        out = str(pkts[0].pktgen.pkt.show)
> +        self.logger.info('SCAPY Result:\n' + out + '\n\n\n')
>          if received:
>              self.verify(('PPP' in out) and 'src=%s'% Dut_tx_mac in out,
> "Receive test failed")
>          else:
> diff --git a/tests/TestSuite_vxlan.py b/tests/TestSuite_vxlan.py index
> d5a9d77..8de8384 100644
> --- a/tests/TestSuite_vxlan.py
> +++ b/tests/TestSuite_vxlan.py
> @@ -447,16 +447,14 @@ class TestVxlan(TestCase, IxiaPacketGenerator):
>          config.create_pcap()
> 
>          # remove tempory files
> +        config.capture_file = "/tmp/sniff_%s.pcap" % self.recv_iface
>          self.tester.send_expect("rm -rf %s" % config.capture_file, "# ")
>          # save the capture packet into pcap format
>          self.tester.scapy_background()
> -        self.tester.scapy_append(
> -
> 'p=sniff(iface="%s",filter="ether[12:2]!=0x88cc",count=1,timeout=5)' %
> self.recv_iface)
> -        self.tester.scapy_append(
> -            'wrpcap(\"%s\", p)' % config.capture_file)
> -        self.tester.scapy_foreground()
> 
> +        inst = self.tester.tcpdump_sniff_packets(self.recv_iface,
> + timeout=5)
>          config.send_pcap(self.tester_iface)
> +        self.tester.load_tcpdump_sniff_packets(inst)
>          time.sleep(5)
> 
>          # extract the checksum offload from saved pcap file
> --
> 2.7.4