public static SsdpMessage Parse(string text)
{
SsdpMessage message = new SsdpMessage();
Regex msgCatReg = new Regex("^(.*?)\\ .*?$", RegexOptions.Multiline | RegexOptions.Compiled);
Regex headerReg = new Regex("^(.*?)\\:\\ ?(.*?)$", RegexOptions.Multiline | RegexOptions.Compiled);
string msgCategory = msgCatReg.Match(text).Groups[1].Value;
if (msgCategory == "NOTIFY")
{
message.Category = SsdpMessageCategory.Advertisement;
}
else if (msgCategory == "M-SEARCH")
{
message.Category = SsdpMessageCategory.DiscoveryRequest;
}
else if (msgCategory == "HTTP/1.1")
{
message.Category = SsdpMessageCategory.DiscoveryResponse;
}
MatchCollection headerMatches = headerReg.Matches(text);
foreach (Match m in headerMatches)
{
message.Headers.Add(m.Groups[1].Value, m.Groups[2].Value);
}
return(message);
}
public void DiscoverAll()
{
SsdpMessage message = new SsdpMessage(SsdpMessageCategory.DiscoveryRequest);
message.Headers.Add(SsdpHeaders.Host, $"{_mcaddr.ToString()}:{_ssdpPort}");
message.Headers.Add(SsdpHeaders.Man, SsdpMessageType.Discover);
message.Headers.Add(SsdpHeaders.Mx, "1");
message.Headers.Add(SsdpHeaders.St, "\"ssdp:all\"");
byte[] buffer = Encoding.UTF8.GetBytes(message.Serialize());
_ucastSocket.SendTo(buffer, new IPEndPoint(_mcaddr, _ssdpPort));
}
private void OnReceive(IAsyncResult ar)
{
Socket socket = (Socket)ar.AsyncState;
int len = 0;
try
{
len = socket.EndReceiveFrom(ar, ref _recvEp);
}
catch (SystemException)
{
return;
}
SsdpMessage message = SsdpMessage.Parse(_recvBuffer, 0, len);
MessageReceived?.Invoke(this, new SsdpMessageEventArgs(((IPEndPoint)_recvEp), message));
if (message.Category == SsdpMessageCategory.Advertisement || message.Category == SsdpMessageCategory.DiscoveryResponse)
{
string usnString;
if (message.Headers.TryGetValue(SsdpHeaders.Usn, out usnString))
{
Usn usn = new Usn(usnString);
if (Devices.Where(x => x.Uuid.Equals(usn.Uuid)).Count() == 0)
{
SsdpDevice d = new SsdpDevice(((IPEndPoint)_recvEp).Address, usn.Uuid);
Devices.Add(d);
Console.WriteLine("Added {0}", usn);
}
else
{
Console.WriteLine("Already in {0}", usn);
}
}
}
socket.BeginReceiveFrom(_recvBuffer, 0, _recvBuffer.Length, SocketFlags.None, ref _recvEp, OnReceive, socket);
}
public SsdpMessageEventArgs(IPEndPoint remoteEndpoint, SsdpMessage message)
{
RemoteEndpoint = remoteEndpoint;
Message = message;
}