private async Task <uint> SendSearchDevicesRequest(SsdpMessage request, CancellationToken token)
{
token.ThrowIfCancellationRequested();
var outputStream = await unicastLocalSocket.GetOutputStreamAsync(Constants.SSDP_HOST, Constants.SSDP_PORT);
var writer = new DataWriter(outputStream);
writer.WriteString(request.ToString());
return(await writer.StoreAsync());
}
private async Task RespondToSearch(HostName host, string port)
{
SsdpMessage searchResponse = new SsdpMessage
{
Type = SsdpMessageType.SearchResponse,
CacheControl = "max-age = 30",
Date = DateTimeOffset.UtcNow,
Server = Name,
ST = Target,
USN = USN,
AdditionalHeaders = new Dictionary <string, string> {
{ "PORT", Port.ToString() }
},
};
var unicastSocket = new DatagramSocket();
var outputStream = await unicastSocket.GetOutputStreamAsync(host, port);
var writer = new DataWriter(outputStream);
writer.WriteString(searchResponse.ToString());
await writer.StoreAsync();
}
public IAsyncOperation <uint> AdvertiseByeBye()
{
return(Task.Run(async() =>
{
SsdpMessage request = new SsdpMessage
{
Type = SsdpMessageType.AdvertiseByeBye,
Host = Constants.SSDP_ADDRESS,
NT = Target,
NTS = "ssdp:byebye",
Server = Name,
USN = USN,
AdditionalHeaders = new Dictionary <string, string> {
{ "PORT", Port.ToString() }
},
};
var outputStream = await multicastSsdpSocket.GetOutputStreamAsync(Constants.SSDP_HOST, Constants.SSDP_PORT);
var writer = new DataWriter(outputStream);
writer.WriteString(request.ToString());
return await writer.StoreAsync();
}).AsAsyncOperation());
}