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<title>HACKING</title>
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<header id="title-block-header">
<h1 class="title">HACKING</h1>
</header>
<h1 id="razercfg---sniffing-the-usb-protocol">Razercfg - Sniffing the
USB protocol</h1>
<p>When adding support for a new mouse, or when debugging issues, it can
be usefull to capture the original protocol with Razer official
configuration software.</p>
<h2 id="requirements">Requirements</h2>
<p>No matter the method, the basic requirements are:</p>
<ul>
<li>a Windows machine with <a
href="http://www.razerzone.com/synapse/">Razer Synapse</a> installed
(note: you’ll need to register)</li>
<li>another mouse: to reduce protocol chatter by avoiding moving the
mouse spied on</li>
</ul>
<h2 id="using-usbpcap-or-wireshark">Using USBPcap or Wireshark</h2>
<p>You can sniff the USB protocol on Windows using <a
href="http://desowin.org/usbpcap/index.html">USBPcap</a>. Take a look at
the <a href="http://desowin.org/usbpcap/tour.html">illustrated tour</a>
for more information. Altenatively you can use <a
href="https://www.wireshark.org/">Wireshark</a>.</p>
<h2 id="using-a-guest-virtualbox-vm-and-usbmon-or-qemu-and-usbmon">Using
a guest VirtualBox VM and usbmon or QEMU and usbmon</h2>
<ol type="1">
<li><p>Install Windows: you can get an evaluation copy (usable for 90
days) of <a
href="https://www.microsoft.com/en-us/evalcenter/evaluate-windows-8-1-enterprise">Windows
8/8.1/10</a> (note: you’ll need to register)</p></li>
<li><p>Find your mouse USB bus and device numbers:</p></li>
</ol>
<pre>
$ lsusb | grep 'ID 1532'
Bus 005 Device 010: ID 1532:0040 Razer USA, Ltd
$ bus=5 dev=10
</pre>
<ol start="3" type="1">
<li><p>configure VM access to the host USB: see the relevant <a
href="http://www.virtualbox.org/manual/ch03.html#idp54668304">USB
support</a> section in the <a
href="https://www.virtualbox.org/manual">VirtualBox manual</a></p></li>
<li><p>load the usbmon module:</p></li>
</ol>
<pre>
sudo modprobe usbmon
</pre>
<ol start="5" type="1">
<li>monitor the bus, filtering for device specific messages:</li>
</ol>
<pre>
sudo cat /sys/kernel/debug/usb/usbmon/${bus}u | awk "{ if (\$4 ~ /:0*${bus}:0*${dev}:[0-9]+$/) print \$0 }"
</pre>
<p>See the <a
href="https://www.kernel.org/doc/Documentation/usb/usbmon.txt">usbmon
documentation</a> for the details of the output format.</p>
<p>Alternatively to VirtualBox VM, you may use <a
href="http://wiki.qemu.org/Main_Page">QEMU</a>.</p>
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