Databases
StackOverflow2013
Postsdbo
POUPnP Multicast: missing answers from M-SEARCH (Discovery)
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUPnP Multicast: missing answers from M-SEARCH (Discovery)
    primarykey
    data
    text
    <p>I created a small program to test UPnP Multicast (Visual C# 2010 Express, running on Windows 7 Professional 64 Bit). I can receive the UPnP NOTIFY Messages from UPnP Devices in my Network. But when i send the M-SEARCH Message, i get no Answers.</p> <p>I have tested the same code on a iOS environment (Monotouch for iOS, running on a iPhone simulator on a Mac). There it runs fine and i get all the search responses from my UPnP devices. I can also see the M-SEARCH message from my windows program.</p> <p>It looks like Windows (or a Firewall?) is hiding the search responses. Any idea?</p> <p>Here is the code:</p> <pre><code>IPEndPoint LocalEndPoint = new IPEndPoint(IPAddress.Any, 1900); IPEndPoint MulticastEndPoint = new IPEndPoint(IPAddress.Parse("239.255.255.250"), 1900); Socket UdpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); UdpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); UdpSocket.Bind(LocalEndPoint); UdpSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(MulticastEndPoint.Address, IPAddress.Any)); UdpSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 2); UdpSocket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastLoopback, true); Console.WriteLine("UDP-Socket setup done...\r\n"); string SearchString = "M-SEARCH * HTTP/1.1\r\nHOST:239.255.255.250:1900\r\nMAN:\"ssdp:discover\"\r\nST:ssdp:all\r\nMX:3\r\n\r\n"; UdpSocket.SendTo(Encoding.UTF8.GetBytes(SearchString), SocketFlags.None, MulticastEndPoint); Console.WriteLine("M-Search sent...\r\n"); byte[] ReceiveBuffer = new byte[64000]; int ReceivedBytes = 0; while (true) { if (UdpSocket.Available &gt; 0) { ReceivedBytes = UdpSocket.Receive(ReceiveBuffer, SocketFlags.None); if (ReceivedBytes &gt; 0) { Console.WriteLine(Encoding.UTF8.GetString(ReceiveBuffer, 0, ReceivedBytes)); } } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USHenk Holterman
    1. USJörn
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POUPnP Multicast: missing answers from M-SEARCH (Discovery)
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POUPnP Multicast: missing answers from M-SEARCH (Discovery)
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POUPnP Multicast: missing answers from M-SEARCH (Discovery)
      1. USWythe
      1. VTFavorite
    1. COWhat is MulticastEndPoint set to?
      singulars
      1. POUPnP Multicast: missing answers from M-SEARCH (Discovery)
      1. USsimonc
    2. COAre you sure that the M-SEARCH you see on iOS is the one from your Windows program? Have you tried another UPnP discovery tool on your Windows box?
      singulars
      1. POUPnP Multicast: missing answers from M-SEARCH (Discovery)
      1. USPavel Zdenek
    3. CO@PavelZdenek: Yes I'm sure. I have attached some extra characters on the M-SEARCH message so I could recognize the message on iOS.
      singulars
      1. POUPnP Multicast: missing answers from M-SEARCH (Discovery)
      1. USJörn
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload