Discovering Nvidia NvBackend endpoint

>>> import requests
>>> r = requests.get("http://localhost:23401")
Traceback (most recent call last):
  File "C:/Python36/lib/site-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "C:/Python36/lib/site-packages/urllib3/connectionpool.py", line 384, in _make_request
    six.raise_from(e, None)
  File "<string>", line 2, in raise_from
  File "C:/Python36/lib/site-packages/urllib3/connectionpool.py", line 380, in _make_request
    httplib_response = conn.getresponse()
  File "C:/Python36/lib/http/client.py", line 1331, in getresponse
    response.begin()
  File "C:/Python36/lib/http/client.py", line 297, in begin
    version, status, reason = self._read_status()
  File "C:/Python36/lib/http/client.py", line 279, in _read_status
    raise BadStatusLine(line)
http.client.BadStatusLine: HTTP 400 Bad request

>>> import requests
>>> r = requests.post("http://localhost:23401")
>>> r
<Response [200]>
>>> r.headers
{'Server': 'NVIDIA Stream HTTP server/2008', 'Content-Type': 'text/xml', 'Content-Length': '533'}
>>> print(r.text)
"""
<?xml version="1.0"?>
<methodResponse>
   <fault>
      <value>
         <struct>
            <member>
               <name>faultCode</name>
               <value><int>12</int></value>
               </member>
            <member>
               <name>faultString</name>
               <value><string>data invalid or corrupted in 'RPC::PoppedDataConvertion; broken XML header'
IO error [#0] while [Sock::RecvTm]
</string></value>
               </member>
            </struct>
         </value>
      </fault>
   </methodResponse>
"""

signed int __thiscall _xml_rpc_parse_data(_DWORD *this, int a2, wchar_t *a3, int a4)
{
  // [...]
  v10 = (_DWORD *)(40 * v6[32] + v9 + 36);
  if ( !*v10 )
  {
    // [...]
    if ( *(_DWORD *)(*(_DWORD *)a2 + 20) < 0x10u )
      v17 = *(const char **)a2;
    else
      v17 = *(const char **)v16;
    v18 = strstr(&v17[*((_DWORD *)v16 + 7)], "</methodName>");
    if ( !v18 )
    {
      v37 = L"RPC::PoppedDataConvertion; broken XML header";
      goto LABEL_41;
    }
    v20 = *(const char **)a2;
    if ( *(_DWORD *)(*(_DWORD *)a2 + 20) < 0x10u )
      v21 = *(const char **)a2;
    else
      v21 = *(const char **)v20;
    __methodName_anchor = strstr(&v21[*((_DWORD *)v20 + 7)], "<methodName>");
    v40 = __methodName_anchor;
    if ( !__methodName_anchor || v18 <= __methodName_anchor )
    {
      v37 = L"Error in request, queue error";
      _send_error_message(v35, (int)v36, v37);
      return 0;
    }
  // [...]
  return result;
}

>>> import requests
>>>  r = requests.get("http://localhost:23401", data='<?xml version="1.0"?>\n<methodName>AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA</methodName>')
                                                                                        # well we might get lucky, init ?
>>> r
<Response [200]>
>>> print(r.text)
"""
<?xml version="1.0"?>
<methodResponse>
   <fault>
      <value>
         <struct>
            <member>
               <name>faultCode</name>
               <value><int>8</int></value>
               </member>
            <member>
               <name>faultString</name>
               <value><string>element not found [XMLRPC's Secret header in HTTP]
</string></value>
               </member>
            </struct>
         </value>
      </fault>
</methodResponse>
"""

>>> import requests
>>> r = requests.get("http://localhost:23401", data='<?xml version="1.0"?>\n<methodName>myMethodName</methodName>', headers={'X-NVRPC-SECRET':"DF1FCCCC6288WG92ABEE8GG0062DB6"})
>>> r
<Response [200]>
>>> print(r.text)
"""
<?xml version="1.0"?>
<methodResponse>
   <fault>
      <value>
         <struct>
            <member>
               <name>faultCode</name>
               <value><int>9</int></value>
               </member>
            <member>
               <name>faultString</name>
               <value><string>Unknown Function name</string></value>
               </member>
            </struct>
         </value>
      </fault>
   </methodResponse>
"""

>>> import requests
>>> r = requests.get("http://localhost:23401", data='<?xml version="1.0"?>\n<methodName>GetVersion</methodName>', headers={'X-NVRPC-SECRET':"DF1FCCCC6288WG92ABEE8GG0062DB6"})
>>> r
<Response [200]>
>>> print(r.text)
"""
<?xml version="1.0"?>
<methodResponse>
   <fault>
      <value>
         <struct>
            <member>
               <name>faultCode</name>
               <value><int>23</int></value>
               </member>
            <member>
               <name>faultString</name>
               <value><string>XML-RPC request invalid: wrong header
</string></value>
               </member>
            </struct>
         </value>
      </fault>
   </methodResponse>
"""

>>> import requests
>>> r = requests.get("http://localhost:23401", data='<?xml version="1.0"?>\n<methodCall><methodName>GetVersion</methodName><params></params></methodCall>', headers={'X-NVRPC-SECRET':"DF1FCCCC6288WG92ABEE8GG0062DB6"})
>>> print(r.text)
"""
<?xml version='1.0' encoding='utf-8' ?>
<methodResponse>
  <params>
    <param>
      <value>
        <struct>
          <member>
            <name>Major</name>
            <value>
              <i4>10</i4>
            </value>
          </member>
          <member>
            <name>Minor</name>
            <value>
              <i4>4</i4>
            </value>
          </member>
          <member>
            <name>BuildNumber</name>
            <value>
              <i4>0</i4>
            </value>
          </member>
          <member>
            <name>Description</name>
            <value>
              <string>NVIDIA Update Backend</string>
            </value>
          </member>
          <member>
            <name>ReleaseDate</name>
            <value>
              <dateTime.iso8601>2015-06-29T00:00:00Z</dateTime.iso8601>
            </value>
          </member>
        </struct>
      </value>
    </param>
  </params>
</methodResponse>
"""