So as an overview, I am working with the Wlanapi and I am fairly new to it (native apis in general). I am running into a problem converting a structure from c++ to c#. Right now I have:
Original:
typedef struct _WLAN_BSS_LIST {
DWORD dwTotalSize;
DWORD dwNumberOfItems;
WLAN_BSS_ENTRY wlanBssEntries[1];
} WLAN_BSS_LIST, *PWLAN_BSS_LIST;
Conversion:
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
struct WLAN_BSS_LIST
{
internal uint dwTotalSize;
internal uint dwNumberOfItems;
internal WLAN_BSS_ENTRY[] wlanBssEntries;
internal WLAN_BSS_LIST(IntPtr ppBssList)
{
dwNumberOfItems = (uint)Marshal.ReadInt32(ppBssList);
//I need to set the value of dwTotalSize but I dunno how
wlanBssEntries = new WLAN_BSS_ENTRY[dwNumberOfItems];
for (int i = 0; i < dwNumberOfItems; i++)
{
IntPtr pWlanBssEntry = new IntPtr(ppBssList.ToInt32() + i *
Marshal.SizeOf(typeof(WLAN_BSS_ENTRY)) + 8);
wlanBssEntries[i] = (WLAN_BSS_ENTRY)Marshal.
PtrToStructure(pWlanBssEntry,
typeof(WLAN_BSS_ENTRY));
}
}
}
I just don't know how to get the total size of the array referenced by ppBssList
:(
As an fyi, I will be extremely disappointed if someone points me to an existing library.
Edited to add original struct
So I figured it out, I dunno what I was thinking...
[StructLayout(LayoutKind.Sequential, Pack=1)]
struct WLAN_BSS_LIST
{
internal uint dwTotalSize;
internal uint dwNumberOfItems;
internal WLAN_BSS_ENTRY[] wlanBssEntries;
internal WLAN_BSS_LIST(IntPtr ppBssList)
{
dwTotalSize = (uint)Marshal.ReadInt32(ppBssList);
dwNumberOfItems = (uint)Marshal.ReadInt32(ppBssList, 4);
wlanBssEntries = new WLAN_BSS_ENTRY[dwNumberOfItems];
for (int i = 0; i < dwNumberOfItems; i++)
{
IntPtr pWlanBssEntry = new IntPtr(ppBssList.ToInt32() + i *
Marshal.SizeOf(typeof(WLAN_BSS_ENTRY)) + 8);
wlanBssEntries[i] = (WLAN_BSS_ENTRY)Marshal.
PtrToStructure(pWlanBssEntry, typeof(WLAN_BSS_ENTRY));
}
}
}
And
[StructLayout(LayoutKind.Sequential)]
public struct WLAN_BSS_ENTRY
{
public DOT11_SSID dot11Ssid;
public uint uPhyId;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
public byte[] dot11Bssid;
public DOT11_BSS_TYPE dot11BssType;
public DOT11_PHY_TYPE dot11BssPhyType;
public int lRssi;
public uint uLinkQuality;
public bool bInRegDomain;
public UInt16 usBeaconPeriod;
public UInt64 ullTimestamp;
public UInt64 ullHostTimestamp;
public UInt16 usCapabilityInformation;
public uint ulChCenterFrequency;
public WLAN_RATE_SET wlanRateSet;
public uint ulIeOffset;
public uint ulIeSize;
}