public void FindDeviceAsync(string SearchTarget)
{
HTTPMessage packet = new HTTPMessage();
packet.Directive = "M-SEARCH";
packet.DirectiveObj = "*";
packet.AddTag("ST", SearchTarget);
packet.AddTag("MX", MX.ToString());
packet.AddTag("MAN", "\"ssdp:discover\"");
packet.AddTag("HOST", "239.255.255.250:1900");
IPAddress[] localAddresses = this.NetInfo.GetLocalAddresses();
IPEndPoint dest = new IPEndPoint(IPAddress.Parse("239.255.255.250"), 0x76c);
for (int i = 0; i < localAddresses.Length; i++)
{
try
{
Socket theSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
theSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);
theSocket.Bind(new IPEndPoint(localAddresses[i], 0));
SSDPSession session = new SSDPSession(theSocket, new SSDPSession.ReceiveHandler(this.HandleAsyncSearch));
this.SSDPSessions[session] = session;
session.SendTo(packet, dest);
session.SendTo(packet, dest);
this.Lifetime.Add(session, 7);
}
catch (Exception exception)
{
EventLogger.Log(this, EventLogEntryType.Error, "CP Failure: " + localAddresses[i].ToString());
EventLogger.Log(exception);
}
}
}
private void HandleAsyncSearch(SSDPSession sender, HTTPMessage msg)
{
DText text = new DText();
string tag = msg.GetTag("Location");
int maxAge = 0;
string str2 = msg.GetTag("Cache-Control").Trim();
if (str2 != "")
{
text.ATTRMARK = ",";
text.MULTMARK = "=";
text[0] = str2;
for (int i = 1; i <= text.DCOUNT(); i++)
{
if (text[i, 1].Trim().ToUpper() == "MAX-AGE")
{
maxAge = int.Parse(text[i, 2].Trim());
break;
}
}
}
str2 = msg.GetTag("USN");
string uSN = str2.Substring(str2.IndexOf(":") + 1);
string searchTarget = msg.GetTag("ST");
if (uSN.IndexOf("::") != -1)
{
uSN = uSN.Substring(0, uSN.IndexOf("::"));
}
EventLogger.Log(this, EventLogEntryType.SuccessAudit, msg.RemoteEndPoint.ToString());
if (this.OnSearch != null)
{
this.OnSearch(msg.RemoteEndPoint, msg.LocalEndPoint, new Uri(tag), uSN, searchTarget, maxAge);
}
}