private void GatherAddressCaps()
{
var lac = new LINEADDRESSCAPS();
byte[] rawBuffer = null;
int rc, neededSize = 1024;
do
{
lac.dwTotalSize = neededSize;
IntPtr pLac = Marshal.AllocHGlobal(neededSize);
Marshal.StructureToPtr(lac, pLac, true);
rc = NativeMethods.lineGetAddressCaps(_lineOwner.TapiManager.LineHandle, _lineOwner.Id, _addressId, (int)_lineOwner.NegotiatedVersion, 0, pLac);
Marshal.PtrToStructure(pLac, lac);
if (lac.dwNeededSize > neededSize)
{
neededSize = lac.dwNeededSize;
rc = NativeMethods.LINEERR_STRUCTURETOOSMALL;
}
else if (rc == NativeMethods.LINEERR_OK)
{
rawBuffer = new byte[lac.dwUsedSize];
Marshal.Copy(pLac, rawBuffer, 0, lac.dwUsedSize);
}
Marshal.FreeHGlobal(pLac);
}while (rc == NativeMethods.LINEERR_STRUCTURETOOSMALL);
_addrCaps = new AddressCapabilities(lac, rawBuffer, _lineOwner.StringFormat);
}
/// <summary>
/// Constructor for the AddressCapabilties
/// </summary>
/// <param name="lac"></param>
/// <param name="rawBuffer"></param>
/// <param name="stringFormat"></param>
internal AddressCapabilities(LINEADDRESSCAPS lac, byte[] rawBuffer, int stringFormat)
{
_lac = lac;
_rawBuffer = rawBuffer;
_stringFormat = stringFormat;
_callFeatures = new CallFeatureSet(lac.dwCallFeatures);
// Grab the available call treatments
if (_lac.dwCallTreatmentListSize > 0 && _lac.dwNumCallTreatments > 0)
{
IntPtr pi = Marshal.AllocHGlobal(_lac.dwCallTreatmentListSize);
var lce = new LINECALLTREATMENTENTRY();
_treatments = new CallTreatment[_lac.dwNumCallTreatments];
int len = Marshal.SizeOf(lce);
for (int i = 0; i < _lac.dwNumCallTreatments; i++)
{
Marshal.Copy(rawBuffer, _lac.dwCallTreatmentListOffset + (i * len), pi, len);
Marshal.PtrToStructure(pi, lce);
_treatments[i] = new CallTreatment(lce.dwCallTreatmentID,
NativeMethods.GetString(rawBuffer, lce.dwCallTreatmentNameOffset, lce.dwCallTreatmentNameSize, stringFormat));
}
Marshal.FreeHGlobal(pi);
}
}
