private static (IntPtr, int) PrepareOptionList(List <InternetPerConnectionOption> options, string connName)
{
int len = options.Sum(o => Marshal.SizeOf(o));
IntPtr buf = Marshal.AllocCoTaskMem(len);
IntPtr cur = buf;
foreach (InternetPerConnectionOption o in options)
{
Marshal.StructureToPtr(o, cur, false);
cur += Marshal.SizeOf(o);
}
InternetPerConnectionOptionList optionList = new InternetPerConnectionOptionList
{
pOptions = buf,
OptionCount = options.Count,
Connection = string.IsNullOrEmpty(connName)
? IntPtr.Zero
: Marshal.StringToHGlobalAuto(connName),
OptionError = 0,
};
int listSize = Marshal.SizeOf(optionList);
optionList.Size = listSize;
IntPtr unmanagedList = Marshal.AllocCoTaskMem(listSize);
Marshal.StructureToPtr(optionList, unmanagedList, true);
return(unmanagedList, listSize);
}
private static void ClearOptionList(IntPtr list)
{
InternetPerConnectionOptionList l = Marshal.PtrToStructure <InternetPerConnectionOptionList>(list);
Marshal.FreeCoTaskMem(l.pOptions);
Marshal.FreeCoTaskMem(list);
}
public static WinINetSetting Query()
{
if (!operational)
{
return(new WinINetSetting());
}
List <InternetPerConnectionOption> options = new List <InternetPerConnectionOption>
{
new InternetPerConnectionOption {
dwOption = (int)InternetPerConnectionOptionEnum.FlagsUI
},
new InternetPerConnectionOption {
dwOption = (int)InternetPerConnectionOptionEnum.ProxyServer
},
new InternetPerConnectionOption {
dwOption = (int)InternetPerConnectionOptionEnum.ProxyBypass
},
new InternetPerConnectionOption {
dwOption = (int)InternetPerConnectionOptionEnum.AutoConfigUrl
},
};
(IntPtr unmanagedList, int listSize) = PrepareOptionList(options, null);
bool ok = InternetQueryOption(IntPtr.Zero, (int)InternetOptions.PerConnectionOption, unmanagedList, ref listSize);
if (!ok)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
WinINetSetting proxy = new WinINetSetting();
InternetPerConnectionOptionList ret = Marshal.PtrToStructure <InternetPerConnectionOptionList>(unmanagedList);
IntPtr p = ret.pOptions;
int nOption = ret.OptionCount;
List <InternetPerConnectionOption> outOptions = new List <InternetPerConnectionOption>();
for (int i = 0; i < nOption; i++)
{
InternetPerConnectionOption o = Marshal.PtrToStructure <InternetPerConnectionOption>(p);
outOptions.Add(o);
p += Marshal.SizeOf(o);
}
foreach (InternetPerConnectionOption o in outOptions)
{
switch ((InternetPerConnectionOptionEnum)o.dwOption)
{
case InternetPerConnectionOptionEnum.FlagsUI:
case InternetPerConnectionOptionEnum.Flags:
proxy.Flags = (InternetPerConnectionFlags)o.Value.dwValue;
break;
case InternetPerConnectionOptionEnum.AutoConfigUrl:
proxy.AutoConfigUrl = Marshal.PtrToStringAuto(o.Value.pszValue);
break;
case InternetPerConnectionOptionEnum.ProxyBypass:
proxy.ProxyBypass = Marshal.PtrToStringAuto(o.Value.pszValue);
break;
case InternetPerConnectionOptionEnum.ProxyServer:
proxy.ProxyServer = Marshal.PtrToStringAuto(o.Value.pszValue);
break;
default:
break;
}
}
return(proxy);
}
