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List: tcpreplay-users
Subject: Re: [Tcpreplay-users] Tcpreplay in single Ethernet interface
From: steve freyder <steve () freyder ! net>
Date: 2023-05-20 21:37:05
Message-ID: 9a63ed3d-33aa-e5f6-246c-577cffd297d8 () freyder ! net
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Hello,
As it turns out, this actually did work several months ago with "tap"
devices, using version 4.3.2 of tcpreplay - and with this version of
Ubuntu/kernel:
# uname -a
Linux ubuntu20 5.4.0-144-generic #161-Ubuntu SMP Fri Feb 3 14:49:04 UTC
2023 x86_64 x86_64 x86_64 GNU/Linux
This test was rewriting the destination IP to that of the local "ens18"
interface, and there was a script listening for UDP packets on
INADDR_ANY (FWIW, in this case on port 4431) and that script was able to
receive the packet produced by tcpreplay-edit that was injected via
tap0. At the time, I think tcpreplay version 4.4.2 had just been
released, so I tested with that, but with 4.4.2, the script did *not*
receive the packet. With older kernels and 4.3.2, it also fails - I
haven't tried newer kernels:
------------------------------------------------------------------------
# tcpreplay-edit -i tap0 -D 0.0.0.0/0:192.168.1.88/32 ... my.pcap
Actual: 1 packets (1360 bytes) sent in 0.000015 seconds
Rated: 90666666.6 Bps, 725.33 Mbps, 66666.66 pps
Statistics for network device: tap0
Successful packets: 1
Failed packets: 0
Truncated packets: 0
Retried packets (ENOBUFS): 0
Retried packets (EAGAIN): 0
# ip a s ens18
2: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel
state UP group default qlen 1000
link/ether 36:46:97:26:fb:36 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.88/24 brd 192.168.1.255 scope global ens18
valid_lft forever preferred_lft forever
# diff --side-by-side <(/usr/bin/tcpreplay-edit --version 2>&1)
<(/usr/local/bin/tcpreplay-edit --version 2>&1)
tcpreplay version: 4.3.2 (build git:v4.3.2) (debug) |
tcpreplay version: 4.4.2 (build git:)
Copyright 2013-2018 by Fred Klassen <tcpreplay at appneta dot |
Copyright 2013-2022 by Fred Klassen <tcpreplay at appneta dot
Copyright 2000-2012 by Aaron Turner <aturner at synfin dot ne
Copyright 2000-2012 by Aaron Turner <aturner at synfin dot ne
The entire Tcpreplay Suite is licensed under the GPLv3 The entire
Tcpreplay Suite is licensed under the GPLv3
Cache file supported: 04 Cache file supported: 04
Not compiled with libdnet. Not compiled with libdnet.
Compiled against libpcap: 1.9.1 Compiled against libpcap: 1.9.1
64 bit packet counters: enabled 64 bit packet counters: enabled
Verbose printing via tcpdump: enabled Verbose printing via tcpdump: enabled
Packet editing: enabled Packet editing: enabled
Fragroute engine: disabled Fragroute engine: disabled
Injection method: PF_PACKET send() Injection method: PF_PACKET send()
Not compiled with netmap Not compiled with netmap
------------------------------------------------------------------------
Best regards,
Steve
On 5/17/2023 9:32 PM, Aaron Turner wrote:
> Can’t send packets to the local host.
>
> -Aaron
>
>
> > On May 17, 2023, at 11:07 AM, Somasekhar K<soma6610@gmail.com> wrote:
> >
> >
> > Hi,
> > I have a requirement to use tcpreplay in a single Ethernet interface.
> > For example if the Ethernet interface name is eth0.
> > I am now to capture packets via tcpdump
> > #tcpdump -i eth0 -w data.pcap udp
> >
> > However when I use
> > # tcpreplay -i eth0 data.pcap
> > I am unable to receive the data in socket.. can u kindly provide me solution to \
> > this problem.. my constraint is I am having single Ethernet interface .
> > -regards,
> > Som
> >
> >
> >
> >
> > _______________________________________________
> > Tcpreplay-users mailing list
> > Tcpreplay-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/tcpreplay-users
> > Support Information:http://tcpreplay.synfin.net/trac/wiki/Support
>
> _______________________________________________
> Tcpreplay-users mailing list
> Tcpreplay-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/tcpreplay-users
> Support Information:http://tcpreplay.synfin.net/trac/wiki/Support
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<p><font face="Courier New, Courier, monospace">Hello,</font></p>
<p><font face="Courier New, Courier, monospace">As it turns out,
this actually did work several months ago with "tap" devices,
using version 4.3.2 of tcpreplay - and with this version of
Ubuntu/kernel:</font></p>
<p><font face="Courier New, Courier, monospace"># uname -a<br>
Linux ubuntu20 5.4.0-144-generic #161-Ubuntu SMP Fri Feb 3
14:49:04 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux</font></p>
<p><font face="Courier New, Courier, monospace">This test was
rewriting the destination IP to that of the local "ens18"
interface, and there was a script listening for UDP packets on
INADDR_ANY (FWIW, in this case on port 4431) and that script was
able to receive the packet produced by tcpreplay-edit that was
injected via tap0. At the time, I think tcpreplay version 4.4.2
had just been released, so I tested with that, but with 4.4.2,
the script did *not* receive the packet. With older kernels and
4.3.2, it also fails - I haven't tried newer kernels:</font></p>
<hr width="100%" size="2">
<p><font face="Courier New, Courier, monospace"><br>
</font></p>
<p><font face="Courier New, Courier, monospace"># tcpreplay-edit -i
tap0 -D 0.0.0.0/0:192.168.1.88/32 ... my.pcap<br>
</font></p>
<p><font face="Courier New, Courier, monospace"> Actual: 1 packets
(1360 bytes) sent in 0.000015 seconds<br>
Rated: 90666666.6 Bps, 725.33 Mbps, 66666.66 pps<br>
Statistics for network device: tap0<br>
Successful packets: 1<br>
Failed packets: 0<br>
Truncated packets: 0<br>
Retried packets (ENOBUFS): 0<br>
Retried packets (EAGAIN): 0<br>
</font><br>
</p>
<p><font face="Courier New, Courier, monospace"># ip a s ens18<br>
</font></p>
<p><font face="Courier New, Courier, monospace">2: ens18:
<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel
state UP group default qlen 1000<br>
link/ether 36:46:97:26:fb:36 brd ff:ff:ff:ff:ff:ff<br>
inet 192.168.1.88/24 brd 192.168.1.255 scope global ens18<br>
valid_lft forever preferred_lft forever<br>
</font></p>
<p><font face="Courier New, Courier, monospace"><br>
</font> </p>
<font face="Courier New, Courier, monospace">
</font>
<p><font face="Courier New, Courier, monospace"># diff
--side-by-side <(/usr/bin/tcpreplay-edit --version
2>&1) <(/usr/local/bin/tcpreplay-edit --version
2>&1)<br>
tcpreplay version: 4.3.2 (build git:v4.3.2) (debug) |
tcpreplay version: 4.4.2 (build git:)<br>
Copyright 2013-2018 by Fred Klassen <tcpreplay at appneta dot
| Copyright 2013-2022 by Fred Klassen <tcpreplay at appneta
dot<br>
Copyright 2000-2012 by Aaron Turner <aturner at synfin dot
ne Copyright 2000-2012 by Aaron Turner <aturner at synfin
dot ne<br>
The entire Tcpreplay Suite is licensed under the GPLv3
The entire Tcpreplay Suite is licensed under the GPLv3<br>
Cache file supported: 04
Cache file supported: 04<br>
Not compiled with libdnet.
Not compiled with libdnet.<br>
Compiled against libpcap: 1.9.1
Compiled against libpcap: 1.9.1<br>
64 bit packet counters: enabled
64 bit packet counters: enabled<br>
Verbose printing via tcpdump: enabled
Verbose printing via tcpdump: enabled<br>
Packet editing: enabled
Packet editing: enabled<br>
Fragroute engine: disabled
Fragroute engine: disabled<br>
Injection method: PF_PACKET send()
Injection method: PF_PACKET send()<br>
Not compiled with netmap
Not compiled with netmap<br>
</font></p>
<hr width="100%" size="2">
<p><font face="Courier New, Courier, monospace"><br>
</font></p>
<p><font face="Courier New, Courier, monospace">Best regards,</font></p>
<p><font face="Courier New, Courier, monospace">Steve</font></p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 5/17/2023 9:32 PM, Aaron Turner
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:84E1FFA0-3231-4C0D-8236-692852D8B109@gmail.com">
<pre class="moz-quote-pre" wrap="">Can’t send packets to the local host.
-Aaron
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">On May 17, 2023, at 11:07 AM, Somasekhar K \
<a class="moz-txt-link-rfc2396E" \
href="mailto:soma6610@gmail.com"><soma6610@gmail.com></a> wrote:
Hi,
I have a requirement to use tcpreplay in a single Ethernet interface.
For example if the Ethernet interface name is eth0.
I am now to capture packets via tcpdump
#tcpdump -i eth0 -w data.pcap udp
However when I use
# tcpreplay -i eth0 data.pcap
I am unable to receive the data in socket.. can u kindly provide me solution to this \
problem.. my constraint is I am having single Ethernet interface .
-regards,
Som
_______________________________________________
Tcpreplay-users mailing list
<a class="moz-txt-link-abbreviated" \
href="mailto:Tcpreplay-users@lists.sourceforge.net">Tcpreplay-users@lists.sourceforge.net</a>
<a class="moz-txt-link-freetext" \
href="https://lists.sourceforge.net/lists/listinfo/tcpreplay-users">https://lists.sourceforge.net/lists/listinfo/tcpreplay-users</a>
Support Information: <a class="moz-txt-link-freetext" \
href="http://tcpreplay.synfin.net/trac/wiki/Support">http://tcpreplay.synfin.net/trac/wiki/Support</a>
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
_______________________________________________
Tcpreplay-users mailing list
<a class="moz-txt-link-abbreviated" \
href="mailto:Tcpreplay-users@lists.sourceforge.net">Tcpreplay-users@lists.sourceforge.net</a>
<a class="moz-txt-link-freetext" \
href="https://lists.sourceforge.net/lists/listinfo/tcpreplay-users">https://lists.sourceforge.net/lists/listinfo/tcpreplay-users</a>
Support Information: <a class="moz-txt-link-freetext" \
href="http://tcpreplay.synfin.net/trac/wiki/Support">http://tcpreplay.synfin.net/trac/wiki/Support</a></pre>
</blockquote>
</body>
</html>
_______________________________________________
Tcpreplay-users mailing list
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https://lists.sourceforge.net/lists/listinfo/tcpreplay-users
Support Information: http://tcpreplay.synfin.net/trac/wiki/Support
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