[dts] [PATCH v3 01/17] framwork/packet: sniff_packet specify running target support
Phil Yang
Phil.Yang at arm.com
Wed Apr 4 09:27:04 CEST 2018
Hi Marvin,
> Filename will be return after running load_pcap_f function, please use that
> name.
> It can be multiple sniffer functions work in the same time.
If so, I think it is better to copy sniffer pcap file outside load_tcpdump_sniff_pcap and load_tcpdump_sniff_packets function of tester module.
I was planning to do it that way in patch V2, but it is need to add tester.session.copy_file_from() operation in each test case.
Can I roll back to patch V2?
Thanks,
Phil Yang
> -----Original Message-----
> From: Liu, Yong <yong.liu at intel.com>
> Sent: Wednesday, April 4, 2018 11:28 AM
> To: Phil Yang <Phil.Yang at arm.com>; dts at dpdk.org
> Cc: nd <nd at arm.com>
> Subject: RE: [PATCH v3 01/17] framwork/packet: sniff_packet specify running
> target support
>
> Phil,
> Some comments are inline.
>
> Thanks,
> Marvin
>
> > -----Original Message-----
> > From: Phil Yang [mailto:phil.yang at arm.com]
> > Sent: Monday, April 02, 2018 11:46 AM
> > To: dts at dpdk.org
> > Cc: nd at arm.com; Liu, Yong <yong.liu at intel.com>; phil.yang at arm.com
> > Subject: [PATCH v3 01/17] framwork/packet: sniff_packet specify
> > running target support
> >
> > If tester in crb file was not the machine which running dts, the
> > sniff_packet process will not running on tester.
> >
> > Create a ssh connection to the tester and run tcpdump to make sure
> > sniff_packet process running on the machine we expected.
> >
> > Signed-off-by: Phil Yang <phil.yang at arm.com>
> > ---
> > framework/packet.py | 34 ++++++++++++++++++++++++++++------
> > framework/tester.py | 38 ++++++++++++++++++++++++++++++++++++++
> > 2 files changed, 66 insertions(+), 6 deletions(-)
> >
> > diff --git a/framework/packet.py b/framework/packet.py index
> > 976b82b..484e511 100755
> > --- a/framework/packet.py
> > +++ b/framework/packet.py
> > @@ -812,15 +812,30 @@ def get_filter_cmd(filters=[]):
> > return ""
> >
> >
> > -def sniff_packets(intf, count=0, timeout=5, filters=[]):
> > +def sniff_packets(intf, count=0, timeout=5, filters=[], target=[]):
> > """
> > sniff all packets for certain port in certain seconds
> > """
> > param = ""
> > direct_param = r"(\s+)\[ (\S+) in\|out\|inout \]"
> > - tcpdump_help = subprocess.check_output("tcpdump -h; echo 0",
> > - stderr=subprocess.STDOUT,
> > - shell=True)
> > +
> > + # target[] contain the remote machine info for ssh connection
> > + # target[0]: username
> > + # target[1]: ip address
> > + # target[2]: pass word
> > + if target:
> > + tcpdump_help_pipe = subprocess.Popen(["ssh",
> > + "%s@%s" % (target[0], target[1]),
> > + "tcpdump -h"],
> > + stderr=subprocess.PIPE,
> > + stdout=subprocess.PIPE,
> > + shell=False)
> > + tcpdump_help = "".join(tuple(tcpdump_help_pipe.communicate()))
> > + tcpdump_help_pipe.wait()
> > + else:
> > + tcpdump_help = subprocess.check_output("tcpdump -h; echo 0",
> > + stderr=subprocess.STDOUT,
> > + shell=True)
> > +
> > for line in tcpdump_help.split('\n'):
> > m = re.match(direct_param, line)
> > if m:
> > @@ -850,9 +865,16 @@ def sniff_packets(intf, count=0, timeout=5,
> > filters=[]):
> > else:
> > cmd = sniff_cmd % options
> >
> > - args = shlex.split(cmd)
> > + if target:
> > + pipe = subprocess.Popen(["ssh",
> > + "%s@%s" % (target[0], target[1]),
> > + cmd],
> > + stdin=subprocess.PIPE,
> > + shell=False)
> > + else:
> > + args = shlex.split(cmd)
> > + pipe = subprocess.Popen(args)
> >
> > - pipe = subprocess.Popen(args)
> > index = str(time.time())
> > SNIFF_PIDS[index] = (pipe, intf, timeout)
> > time.sleep(1)
> > diff --git a/framework/tester.py b/framework/tester.py index
> > a775f68..10761a8 100755
> > --- a/framework/tester.py
> > +++ b/framework/tester.py
> > @@ -70,6 +70,7 @@ class Tester(Crb):
> > self.bgCmds = []
> > self.bgItf = ''
> > self.re_run_time = 0
> > + self.sniff_intf = ''
> >
> > def init_ext_gen(self):
> > """
> > @@ -704,6 +705,43 @@ class Tester(Crb):
> > self.proc.kill()
> > self.proc = None
> >
> > + def tcpdump_sniff_packets(self, intf, count=0, timeout=5, filters=[]):
> > + """
> > + Wrapper for packet module sniff_packets
> > + """
> > + # load functions in packet module
> > + module = __import__("packet")
> > + sniff_f = getattr(module, "sniff_packets")
> > +
> > + target=[]
> > + target.append(self.get_username())
> > + target.append(self.get_ip_address())
> > + target.append(self.get_password())
> > + self.sniff_intf = intf
>
> Indent not align here, and I think there's no need to save sniffer interface in this
> module.
>
> > + return sniff_f(intf, count, timeout, filters, target)
> > +
> > + def load_tcpdump_sniff_pcap(self, index=''):
> > + """
> > + Wrapper for packet module load_sniff_pcap
> > + """
> > + # load functions in packet module
> > + module = __import__("packet")
> > + load_pcap_f = getattr(module, "load_sniff_pcap")
> > + self.session.copy_file_from("/tmp/sniff_%s.pcap" % self.sniff_intf,
> > "/tmp/")
> > +
>
> Filename will be return after running load_pcap_f function, please use that
> name.
> It can be multiple sniffer functions work in the same time.
>
> > + return load_pcap_f(index)
> > +
> > + def load_tcpdump_sniff_packets(self, index=''):
> > + """
> > + Wrapper for packet module load_sniff_packets
> > + """
> > + # load functions in packet module
> > + module = __import__("packet")
> > + load_f = getattr(module, "load_sniff_packets")
> > + self.session.copy_file_from("/tmp/sniff_%s.pcap" % self.sniff_intf,
> > "/tmp/")
> > +
> > + return load_f(index)
> > +
> > def kill_all(self, killall=False):
> > """
> > Kill all scapy process or DPDK application on tester.
> > --
> > 2.7.4
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