/// <summary>
/// Pobranie wszystkich połączeń RAS.
/// </summary>
/// <returns>Struktury połączeń RAS</returns>
private RASCONN[] GetRasConnections()
{
// Stworzenie tablicy, którą później należy przekazać funkcjom
int rasEnumReturn;
RASCONN[] rasconnStructs = new RASCONN[256];
rasconnStructs.Initialize(); // inicjalizacja wszystkich pól struktury
rasconnStructs[0].dwSize = Marshal.SizeOf(typeof(RASCONN)); // inicjalizacja pierwszego pola pierwszej struktury na wartość wielkości tej struktury
int sizeOfRasconnStruct = rasconnStructs[0].dwSize * rasconnStructs.Length; // wielkość pojedynczej struktury * ilosc
// Wywołanie RasEnumConnections do zdobycia wszystkich aktywnych połączeń RAS
rasEnumReturn = RasEnumConnections(rasconnStructs, ref sizeOfRasconnStruct, ref rasConnectionsAmount);
// jeżeli RasEnumConnections nie zwróciło ERROR_SUCCESS
if (rasEnumReturn != 0) throw new Win32Exception(rasEnumReturn);
return rasconnStructs;
}
/// <summary>
/// 断开所有链接
/// </summary>
/// <returns></returns>
public int HangAllConnection()
{
int flags = 0;
InternetGetConnectedState(ref flags, 0);
if (!((flags & INTERNET_RAS_INSTALLED) == INTERNET_RAS_INSTALLED))
{
throw new NotSupportedException();
}
//create array of structures to pass to API
int ret;
int conns = 0;
RASCONN[] rarr = new RASCONN[256];
rarr.Initialize();
rarr[0].dwSize = Marshal.SizeOf(typeof(RASCONN));
int lr = rarr[0].dwSize * rarr.Length;
//call RasEnumConnections to loop all RAS connections
ret = RasEnumConnections(rarr, ref lr, ref conns);
if (ret != 0)
{
throw new Win32Exception(ret);
}
//loop through each RASCONN struct
for (int i = 0; i < conns; i++)
{
//retrieve RASCONN struct
RASCONN r = rarr[i];
//if connection bad, handle will be 0
if (r.hrasconn == IntPtr.Zero)
{
continue;
}
return(RasHangUp(r.hrasconn));
}
return(-1);
}
static void Main(string[] args)
{
//make sure that RAS is installed
int flags = 0;
InternetGetConnectedState(ref flags, 0);
if (!((flags & INTERNET_RAS_INSTALLED) == INTERNET_RAS_INSTALLED))
{
throw new NotSupportedException();
}
//create array of structures to pass to API
int ret;
int conns = 0;
RASCONN[] rarr = new RASCONN[256];
rarr.Initialize();
rarr[0].dwSize = Marshal.SizeOf(typeof(RASCONN));
int lr = rarr[0].dwSize * rarr.Length;
//call RasEnumConnections to loop all RAS connections
ret = RasEnumConnections(rarr, ref lr, ref conns);
if (ret != 0)
{
throw new Win32Exception(ret);
}
//loop through each RASCONN struct
for (int i = 0; i < conns; i++)
{
//retrieve RASCONN struct
RASCONN r = rarr[i];
//if connection bad, handle will be 0
if (r.hrasconn == IntPtr.Zero)
{
continue;
}
//get status of RAS connection
RASCONNSTATUS rcs = new RASCONNSTATUS();
rcs.dwSize = Marshal.SizeOf(typeof(RASCONNSTATUS));
ret = RasGetConnectStatus(r.hrasconn, ref rcs);
if (ret != 0)
{
throw new Win32Exception(ret);
}
//print useful information to the console for each RAS connection
Console.WriteLine("RAS CONNECTION {0}:", i + 1);
Console.WriteLine("\tDevice Name : {0}", r.szDeviceName);
Console.WriteLine("\tDevice Type : {0}", r.szDeviceType);
Console.WriteLine("\tPhone Number: {0}", rcs.szPhoneNumber);
Console.WriteLine("\tConnected? : {0}",
rcs.rasconnstate == RAS_Connected);
Console.WriteLine("\tEntry Name : {0}", r.szEntryName);
Console.WriteLine("\tPhone Book : {0}", r.szPhonebook);
Console.WriteLine();
}
Console.ReadLine();
}