/// <summary>
/// Remove entry from phone-book, then break connection established early.
/// </summary>
public void Disconnect()
{
if (this._handle == IntPtr.Zero)
{
return;
}
Ras.RASCONNSTATUS status = new Ras.RASCONNSTATUS();
// force hangup
try
{
Ras.RasCheck(Ras.RasHangUp(this._handle));
}
catch (RasException ex)
{
if (ex.ErrorCode != (uint)RasError.ERROR_NO_CONNECTION)
{
throw ex;
}
}
while (6 != Ras.RasGetConnectStatus(this._handle, status))
{
Thread.Sleep(0);
}
this.DeleteEntry();
this._handle = IntPtr.Zero;
}
// get properties of existent phone-book entry and fill _ent structure of this class
private void GetEntry()
{
int entrySize = 0;
IntPtr buff = IntPtr.Zero;
Ras.RasGetEntryProperties(null, this._params.szEntryName, buff, ref entrySize, 0, 0);
buff = Marshal.AllocHGlobal(entrySize);
Marshal.WriteInt32(buff, this._ent.dwSize);
Ras.RasCheck(Ras.RasGetEntryProperties(null, this._params.szEntryName, buff, ref entrySize, 0, 0));
this._ent = (Ras.RASENTRY)Marshal.PtrToStructure(buff, typeof(Ras.RASENTRY));
Marshal.FreeHGlobal(buff);
}
/// <summary>
/// Create new entry in phone-book, then establish connection. <see cref="Disconnect()"/> method must be called in any case to balance call of this method.
/// </summary>
public void Connect()
{
if (this._handle != IntPtr.Zero)
{
Ras.RASCONNSTATUS status = new Ras.RASCONNSTATUS();
uint res = Ras.RasGetConnectStatus(this._handle, status);
if (res == 6) // i.e. ERROR_INVALID_HANDLE
{
this._handle = IntPtr.Zero;
}
else
{
return; // already established
}
}
uint validateName = Ras.RasValidateEntryName(null, this._params.szEntryName);
if (validateName != (uint)RasError.SUCCESS)
{
throw new RasException("Entry name " + ((this._params.szEntryName == null || this._params.szEntryName.Length <= 0) ? "<Empty Name>" : this._params.szEntryName) + " not valid or already presented in phone-book.");
}
// 1) Create new entry
this._ent.dwDialMode = 1;
this._ent.dwDialExtraPercent = 75;
this._ent.dwDialExtraSampleSeconds = 120;
this._ent.dwHangUpExtraPercent = 10;
this._ent.dwHangUpExtraSampleSeconds = 120;
this.SetEntry();
// just test that entry was written successfully
this.GetEntry();
// 2) Use created entry to establish connection
try
{
Ras.RasCheck(Ras.RasDial(null, (this._phonebook != null && this._phonebook.Length > 0) ? this._phonebook : null, this._params, 0, null, ref this._handle));
}
catch (Exception ex)
{
this.Disconnect();
throw ex;
}
this.OnConnected();
this.StartWatch();
Ras.RasConnectionNotification(this._handle, this._disconnEvent.Handle, Ras.RASNOTIFICATION.RASCN_Disconnection);
}
// create new entry and set it's properties from _ent structure of this class
private void SetEntry()
{
Ras.RasCheck(Ras.RasSetEntryProperties(null, this._params.szEntryName, ref this._ent, this._ent.dwSize, 0, 0));
}
// delete entry that was created before connection
private void DeleteEntry()
{
Ras.RasCheck(Ras.RasDeleteEntry(null, this._params.szEntryName));
}