internal void Discover(NetPeer peer)
{
string content =
"M-SEARCH * HTTP/1.1\r\n" +
"HOST: 239.255.255.250:1900\r\n" +
"ST:upnp:rootdevice\r\n" +
"MAN:\"ssdp:discover\"\r\n" +
"MX:3\r\n\r\n";
m_discoveryResponseDeadline = NetTime.Now + 6.0; // arbitrarily chosen number, router gets 6 seconds to respond
m_status = UPnPStatus.Discovering;
byte[] raw = System.Text.Encoding.UTF8.GetBytes(content);
m_peer.LogDebug("Attempting UPnP discovery");
peer.Socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true);
if (peer.Configuration.BroadcastAddress.Equals(IPAddress.Broadcast))
{
foreach (IPAddress address in NetUtility.GetBroadcastAddresses())
{
peer.RawSend(raw, 0, raw.Length, new NetEndPoint(address, 1900));
}
}
else
{
peer.RawSend(raw, 0, raw.Length, new NetEndPoint(peer.Configuration.BroadcastAddress, 1900));
}
peer.Socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, false);
}
/// <summary>
/// Emit a discovery signal to all hosts on your subnet
/// </summary>
public void DiscoverLocalPeers(int serverPort)
{
NetOutgoingMessage um = CreateMessage(0);
um.m_messageType = NetMessageType.Discovery;
Interlocked.Increment(ref um.m_recyclingCount);
if (m_configuration.Equals(IPAddress.Broadcast))
{
foreach (IPAddress address in NetUtility.GetBroadcastAddresses())
{
m_unsentUnconnectedMessages.Enqueue(new NetTuple <NetEndPoint, NetOutgoingMessage>(new NetEndPoint(address, serverPort), um));
}
}
else
{
m_unsentUnconnectedMessages.Enqueue(new NetTuple <NetEndPoint, NetOutgoingMessage>(new NetEndPoint(m_configuration.BroadcastAddress, serverPort), um));
}
}