1 files changed, 68 insertions, 0 deletions
diff --git a/RSSDP/SsdpConstants.cs b/RSSDP/SsdpConstants.cs
new file mode 100644
index 000000000..c839d9e0b
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+++ b/RSSDP/SsdpConstants.cs
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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Rssdp.Infrastructure
+{
+	/// <summary>
+	/// Provides constants for common values related to the SSDP protocols.
+	/// </summary>
+	public static class SsdpConstants
+	{
+
+		/// <summary>
+		/// Multicast IP Address used for SSDP multicast messages. Values is 239.255.255.250.
+		/// </summary>
+		public const string MulticastLocalAdminAddress = "239.255.255.250";
+		/// <summary>
+		/// The UDP port used for SSDP multicast messages. Values is 1900.
+		/// </summary>
+		public const int MulticastPort = 1900;
+		/// <summary>
+		/// The default multicase TTL for SSDP multicast messages. Value is 4.
+		/// </summary>
+		public const int SsdpDefaultMulticastTimeToLive = 4;
+
+		internal const string MSearchMethod = "M-SEARCH";
+
+		internal const string SsdpDiscoverMessage = "ssdp:discover";
+		internal const string SsdpDiscoverAllSTHeader = "ssdp:all";
+
+		internal const string SsdpDeviceDescriptionXmlNamespace = "urn:schemas-upnp-org:device-1-0";
+
+		/// <summary>
+		/// Default buffer size for receiving SSDP broadcasts. Value is 8192 (bytes).
+		/// </summary>
+		public const int DefaultUdpSocketBufferSize = 8192;
+		/// <summary>
+		/// The maximum possible buffer size for a UDP message. Value is 65507 (bytes).
+		/// </summary>
+		public const int MaxUdpSocketBufferSize = 65507; // Max possible UDP packet size on IPv4 without using 'jumbograms'.
+
+		/// <summary>
+		/// Namespace/prefix for UPnP device types. Values is schemas-upnp-org.
+		/// </summary>
+		public const string UpnpDeviceTypeNamespace = "schemas-upnp-org";
+		/// <summary>
+		/// UPnP Root Device type. Value is upnp:rootdevice.
+		/// </summary>
+		public const string UpnpDeviceTypeRootDevice = "upnp:rootdevice";
+		/// <summary>
+		/// The value is used by Windows Explorer for device searches instead of the UPNPDeviceTypeRootDevice constant. 
+		/// Not sure why (different spec, bug, alternate protocol etc). Used to enable Windows Explorer support.
+		/// </summary>
+		public const string PnpDeviceTypeRootDevice = "pnp:rootdevice";
+		/// <summary>
+		/// UPnP Basic Device type. Value is Basic.
+		/// </summary>
+		public const string UpnpDeviceTypeBasicDevice = "Basic";
+
+		internal const string SsdpKeepAliveNotification = "ssdp:alive";
+		internal const string SsdpByeByeNotification = "ssdp:byebye";
+
+		internal const int UdpResendCount = 3;
+
+	}
+}