https://criu.org/api.php?action=feedcontributions&feedformat=atom&user=IvinpolosonyCRIU - User contributions [en]2026-05-13T11:25:59ZUser contributionsMediaWiki 1.35.6https://criu.org/index.php?title=Simple_TCP_pair&diff=4828Simple TCP pair2019-02-09T19:48:16Z<p>Ivinpolosony: /* Then restore the client */</p>
<hr />
<div>This page describes step-by-step how to play with TCP dumping and restoring.<br />
<br />
__TOC__<br />
<br />
== Compile and run simple TCP client and server ==<br />
The below program is a simple echo server and a client, that pings server with increasing numbers once a second. In this howto we will dump and restore the client part.<br />
{| class="mw-collapsible mw-collapsed wikitable"<br />
! <code>tcp-howto.c</code><br />
|-<br />
| {{:Simple_TCP_pair/tcp-howto.c}}<br />
|}<br />
<br />
Compile it and run the server:<br />
<br />
# ./tcp-howto <some-port><br />
<br />
On another terminal (for better output readability) run the client:<br />
<br />
# ./tcp-howto 127.0.0.1 <some-port><br />
<br />
== Try to dump the client ==<br />
Create a directory for images (<code>img-dir/</code> below) and dump the client<br />
<pre><br />
# criu dump --tree <tcp-howto-client-pid> --images-dir img-dir/ -v4 -o dump.log --shell-job --tcp-established<br />
</pre><br />
<br />
The <code>--tcp-established</code> option is a must, since client have active TCP connection and we should explicitly inform crtools about it.<br />
<br />
The <code>--shell-job</code> option is also required, as the client was launched from shell and uses shell's session and terminal.<br />
<br />
== Then restore the client ==<br />
It's done like this<br />
<pre><br />
# criu restore --images-dir img-dir/ -v4 -o rst.log --shell-job --tcp-established<br />
</pre><br />
<br />
That's it. After this in the terminal you launched criu from you should see the continuing output of the tcp client.<br />
<br />
== See also ==<br />
<br />
* [[TCP connection]]<br />
<br />
[[Category:HOWTO]]<br />
[[Category:Sockets]]</div>Ivinpolosonyhttps://criu.org/index.php?title=Simple_TCP_pair&diff=4827Simple TCP pair2019-02-09T19:47:42Z<p>Ivinpolosony: /* Try to dump the client */</p>
<hr />
<div>This page describes step-by-step how to play with TCP dumping and restoring.<br />
<br />
__TOC__<br />
<br />
== Compile and run simple TCP client and server ==<br />
The below program is a simple echo server and a client, that pings server with increasing numbers once a second. In this howto we will dump and restore the client part.<br />
{| class="mw-collapsible mw-collapsed wikitable"<br />
! <code>tcp-howto.c</code><br />
|-<br />
| {{:Simple_TCP_pair/tcp-howto.c}}<br />
|}<br />
<br />
Compile it and run the server:<br />
<br />
# ./tcp-howto <some-port><br />
<br />
On another terminal (for better output readability) run the client:<br />
<br />
# ./tcp-howto 127.0.0.1 <some-port><br />
<br />
== Try to dump the client ==<br />
Create a directory for images (<code>img-dir/</code> below) and dump the client<br />
<pre><br />
# criu dump --tree <tcp-howto-client-pid> --images-dir img-dir/ -v4 -o dump.log --shell-job --tcp-established<br />
</pre><br />
<br />
The <code>--tcp-established</code> option is a must, since client have active TCP connection and we should explicitly inform crtools about it.<br />
<br />
The <code>--shell-job</code> option is also required, as the client was launched from shell and uses shell's session and terminal.<br />
<br />
== Then restore the client ==<br />
It's done like this<br />
<pre><br />
# criu restore --images-dir img-dir/ -v 4 -o rst.log --shell-job --tcp-established<br />
</pre><br />
<br />
That's it. After this in the terminal you launched criu from you should see the continuing output of the tcp client.<br />
<br />
== See also ==<br />
<br />
* [[TCP connection]]<br />
<br />
[[Category:HOWTO]]<br />
[[Category:Sockets]]</div>Ivinpolosony