protected static int IPSecGetNegPolData(IntPtr hStore, Guid negGuid, out IPSEC_NEGPOL_DATA ipsecNegPolData)
{
ipsecNegPolData = new IPSEC_NEGPOL_DATA();
//Allocate memory for the struct pointer.
IntPtr ppIpsecNegPolData = Marshal.AllocHGlobal(Marshal.SizeOf(new IntPtr()));
//Execute the native import.
int hr = IPSecGetNegPolData(hStore, negGuid, ppIpsecNegPolData);
if (hr != 0)
{
return(hr);
}
//Dereference the double pointer once.
IntPtr pIpsecNegPolData = Marshal.ReadIntPtr(ppIpsecNegPolData);
//Marshal the dereferenced pointer to a structure.
ipsecNegPolData = (IPSEC_NEGPOL_DATA)Marshal.PtrToStructure(pIpsecNegPolData, typeof(IPSEC_NEGPOL_DATA));
//Free memory.
Marshal.FreeHGlobal(ppIpsecNegPolData);
return(hr);
}
protected static int IPSecCreateNegPolData(IntPtr hStore, IPSEC_NEGPOL_DATA ipsecNegPolData)
{
IntPtr pIpsecNegPolData = Marshal.AllocHGlobal(Marshal.SizeOf(ipsecNegPolData));
Marshal.StructureToPtr(ipsecNegPolData, pIpsecNegPolData, false);
int hr = IPSecCreateNegPolData(hStore, pIpsecNegPolData);
Marshal.FreeHGlobal(pIpsecNegPolData);
return(hr);
}
/// <summary>
/// Creates a standalone filter action.
/// </summary>
/// <param name="hStore">A handle to the policy store.</param>
/// <param name="name">The name to give the filter action.</param>
/// <param name="action">The type of action.</param>
/// <param name="ipsecNegPol">An out struct to return the data.</param>
/// <param name="description">The description to give the filter action.</param>
/// <returns>A WinError System Error Code.</returns>
private int CreateFilterAction(string name, FilterActionType action, out IPSEC_NEGPOL_DATA ipsecNegPol, string description = "")
{
ipsecNegPol = new IPSEC_NEGPOL_DATA()
{
pszIpsecName = name,
pszDescription = description,
NegPolType = GUID_NEGOTATION_TYPE_STANDARD,
NegPolIdentifier = Guid.NewGuid(),
dwWhenChanged = (int)new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds(),
};
if (action == FilterActionType.Block)
{
ipsecNegPol.NegPolAction = GUID_NEGOTIATION_ACTION_BLOCK;
}
else
{
throw new NotImplementedException();
}
return(IPSecCreateNegPolData(hStore, ipsecNegPol));
}