MIME-Version: 1.0
In-Reply-To: <CA+BoTQ=Dg11cP+TJ2_ZkMnjqma62we-JKNWMx8RHJX7ORnvc1A@mail.gmail.com>
References: <CABPxzY+HpP=NTrAaUEzV5nFm=LK93m=kxPV14-cdftt+VPsWNw@mail.gmail.com>
 <CA+BoTQ=s_SMgs9zkgYjKOHKDwRORWk-Re7XZ=AiKiHCuNc0L8A@mail.gmail.com>
 <CABPxzYJRS8fLzxPiy1J4jKRvgVaS-OCKK08_bjP2Amo_V54pPA@mail.gmail.com> <CA+BoTQ=Dg11cP+TJ2_ZkMnjqma62we-JKNWMx8RHJX7ORnvc1A@mail.gmail.com>
From: Krishna Chaitanya <chaitanya.mgit@gmail.com>
Date: Thu, 4 Feb 2016 17:57:19 +0530
Message-ID: <CABPxzYKuja-X4DHqgcRkK=bRR0aUAyFz1LvB57-64pdcbqHUyQ@mail.gmail.com> (sfid-20160204_132744_463774_A3F12BF2)
Subject: Re: mac80211_hwsim + iperf + netns
To: Michal Kazior <michal.kazior@tieto.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>
Content-Type: text/plain; charset=UTF-8
Sender: linux-wireless-owner@vger.kernel.org

On Thu, Feb 4, 2016 at 5:23 PM, Michal Kazior <michal.kazior@tieto.com> wrote:
> On 4 February 2016 at 12:49, Krishna Chaitanya <chaitanya.mgit@gmail.com> wrote:
>> On Thu, Feb 4, 2016 at 5:02 PM, Michal Kazior <michal.kazior@tieto.com> wrote:
>>> On 4 February 2016 at 12:22, Krishna Chaitanya <chaitanya.mgit@gmail.com> wrote:
>>>> Hi All,
>>>>
>>>> I am trying to run some iperf tests using mac80211_hwsim b/w AP and STA.
>>>> Even after tweaking the routing table, the packets are still not going through
>>>> mac80211_hwsim instead they are just looping back.
>>>>
>>>> After a quick search i found that we should use different network namespaces.
>>>> Can anyone tell me the exact procedure for this? I have found a procedure
>>>> in the below link, but i dont have the lxc-unshare for my embedded box.
>>>> Is there any alternate way for this.
>>>
>>> If you have a recent enough iproute2 package you can use:
>> Unfortunately i dont, will try to get the latest.
>>>  ip netns add ns1
>>>  ip netns exec ns1 bash # get the PID in the session and don't close it
>>>  iw phy phyX set netns $pid_of_that_shell
>>>  # you can close the bash now; phyX will remain in ns1
>>>
>>> Or you could try using ipv6 link-local addresses which will not
>>> require you to use namespaces at all.
>> Tried this but still not able to excite mac80211_hwsim TX path.
>> below are commands and config.
>>
>> wlan0     Link encap:Ethernet  HWaddr 02:00:00:00:00:00
>>           inet addr:10.0.0.1  Bcast:10.255.255.255  Mask:255.0.0.0
>>           inet6 addr: fe80::ff:fe00:0/64 Scope:Link
>>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>           RX packets:8 errors:0 dropped:1 overruns:0 frame:0
>>           TX packets:38 errors:0 dropped:0 overruns:0 carrier:0
>>           collisions:0 txqueuelen:1000
>>           RX bytes:648 (648.0 B)  TX bytes:3680 (3.5 KiB)
>>
>> wlan1     Link encap:Ethernet  HWaddr 02:00:00:00:01:00
>>           inet addr:20.0.0.1  Bcast:20.255.255.255  Mask:255.0.0.0
>>           inet6 addr: fe80::ff:fe00:100/64 Scope:Link
>>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>           RX packets:3 errors:0 dropped:0 overruns:0 frame:0
>>           TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
>>           collisions:0 txqueuelen:1000
>>           RX bytes:126 (126.0 B)  TX bytes:808 (808.0 B)
>>
>> iperf -s  -B fe80::ff:fe00:0 &
>> iperf -c fe80::ff:fe00:0 -B fe80::ff:fe00:100 -t 60 -i 1
>>
>> Something wrong?
>
> For link-local addresses you must specify interface you want to use them.
>
> Also, there's an iperf switch to understand ipv6 "-V".
>
>  iperf -V -i1 -s
>  iperf -V -i1 -c fe80::ff:fe00:0%wlan1
>  iperf -V -i1 -c fe80::ff:fe00:100%wlan0
>
Thanks a lot Michal. It worked like a charm.