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using MediaBrowser.Common.Win32;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Management;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
namespace MediaBrowser.Common.Net
{
/// <summary>
/// Class NetUtils
/// </summary>
public static class NetUtils
{
/// <summary>
/// Gets the machine's local ip address
/// </summary>
/// <returns>IPAddress.</returns>
public static IPAddress GetLocalIpAddress()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
return host.AddressList.FirstOrDefault(i => i.AddressFamily == AddressFamily.InterNetwork);
}
/// <summary>
/// Gets a random port number that is currently available
/// </summary>
/// <returns>System.Int32.</returns>
public static int GetRandomUnusedPort()
{
var listener = new TcpListener(IPAddress.Any, 0);
listener.Start();
var port = ((IPEndPoint)listener.LocalEndpoint).Port;
listener.Stop();
return port;
}
/// <summary>
/// Creates the netsh URL registration.
/// </summary>
/// <param name="urlPrefix">The URL prefix.</param>
public static void CreateNetshUrlRegistration(string urlPrefix)
{
var startInfo = new ProcessStartInfo
{
FileName = "netsh",
Arguments = string.Format("http add urlacl url={0} user=\"NT AUTHORITY\\Authenticated Users\"", urlPrefix),
CreateNoWindow = true,
WindowStyle = ProcessWindowStyle.Hidden,
Verb = "runas",
ErrorDialog = false
};
using (var process = Process.Start(startInfo))
{
process.WaitForExit();
}
}
/// <summary>
/// Adds the windows firewall rule.
/// </summary>
/// <param name="port">The port.</param>
/// <param name="protocol">The protocol.</param>
public static void AddWindowsFirewallRule(int port, NetworkProtocol protocol)
{
// First try to remove it so we don't end up creating duplicates
RemoveWindowsFirewallRule(port, protocol);
var args = string.Format("advfirewall firewall add rule name=\"Port {0}\" dir=in action=allow protocol={1} localport={0}", port, protocol);
RunNetsh(args);
}
/// <summary>
/// Removes the windows firewall rule.
/// </summary>
/// <param name="port">The port.</param>
/// <param name="protocol">The protocol.</param>
public static void RemoveWindowsFirewallRule(int port, NetworkProtocol protocol)
{
var args = string.Format("advfirewall firewall delete rule name=\"Port {0}\" protocol={1} localport={0}", port, protocol);
RunNetsh(args);
}
/// <summary>
/// Runs the netsh.
/// </summary>
/// <param name="args">The args.</param>
private static void RunNetsh(string args)
{
var startInfo = new ProcessStartInfo
{
FileName = "netsh",
Arguments = args,
CreateNoWindow = true,
WindowStyle = ProcessWindowStyle.Hidden,
Verb = "runas",
ErrorDialog = false
};
using (var process = new Process { StartInfo = startInfo })
{
process.Start();
process.WaitForExit();
}
}
/// <summary>
/// Returns MAC Address from first Network Card in Computer
/// </summary>
/// <returns>[string] MAC Address</returns>
public static string GetMacAddress()
{
var mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
var moc = mc.GetInstances();
var macAddress = String.Empty;
foreach (ManagementObject mo in moc)
{
if (macAddress == String.Empty) // only return MAC Address from first card
{
try
{
if ((bool)mo["IPEnabled"]) macAddress = mo["MacAddress"].ToString();
}
catch
{
mo.Dispose();
return "";
}
}
mo.Dispose();
}
return macAddress.Replace(":", "");
}
/// <summary>
/// Uses the DllImport : NetServerEnum with all its required parameters
/// (see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/netmgmt/netmgmt/netserverenum.asp
/// for full details or method signature) to retrieve a list of domain SV_TYPE_WORKSTATION
/// and SV_TYPE_SERVER PC's
/// </summary>
/// <returns>Arraylist that represents all the SV_TYPE_WORKSTATION and SV_TYPE_SERVER
/// PC's in the Domain</returns>
public static IEnumerable<string> GetNetworkComputers()
{
//local fields
const int MAX_PREFERRED_LENGTH = -1;
var SV_TYPE_WORKSTATION = 1;
var SV_TYPE_SERVER = 2;
var buffer = IntPtr.Zero;
var tmpBuffer = IntPtr.Zero;
var entriesRead = 0;
var totalEntries = 0;
var resHandle = 0;
var sizeofINFO = Marshal.SizeOf(typeof(_SERVER_INFO_100));
try
{
//call the DllImport : NetServerEnum with all its required parameters
//see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/netmgmt/netmgmt/netserverenum.asp
//for full details of method signature
var ret = NativeMethods.NetServerEnum(null, 100, ref buffer, MAX_PREFERRED_LENGTH, out entriesRead, out totalEntries, SV_TYPE_WORKSTATION | SV_TYPE_SERVER, null, out resHandle);
//if the returned with a NERR_Success (C++ term), =0 for C#
if (ret == 0)
{
//loop through all SV_TYPE_WORKSTATION and SV_TYPE_SERVER PC's
for (var i = 0; i < totalEntries; i++)
{
//get pointer to, Pointer to the buffer that received the data from
//the call to NetServerEnum. Must ensure to use correct size of
//STRUCTURE to ensure correct location in memory is pointed to
tmpBuffer = new IntPtr((int)buffer + (i * sizeofINFO));
//Have now got a pointer to the list of SV_TYPE_WORKSTATION and
//SV_TYPE_SERVER PC's, which is unmanaged memory
//Needs to Marshal data from an unmanaged block of memory to a
//managed object, again using STRUCTURE to ensure the correct data
//is marshalled
var svrInfo = (_SERVER_INFO_100)Marshal.PtrToStructure(tmpBuffer, typeof(_SERVER_INFO_100));
//add the PC names to the ArrayList
if (!string.IsNullOrEmpty(svrInfo.sv100_name))
{
yield return svrInfo.sv100_name;
}
}
}
}
finally
{
//The NetApiBufferFree function frees
//the memory that the NetApiBufferAllocate function allocates
NativeMethods.NetApiBufferFree(buffer);
}
}
}
/// <summary>
/// Enum NetworkProtocol
/// </summary>
public enum NetworkProtocol
{
/// <summary>
/// The TCP
/// </summary>
Tcp,
/// <summary>
/// The UDP
/// </summary>
Udp
}
}
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