private unsafe static void GetAddressesForAdapter(byte *pData, ref UnicastIPAddressInformationCollection addressList)
{
addressList.InternalClear();
/*
* typedef struct _IP_ADAPTER_ADDRESSES {
* union {
* ULONGLONG Alignment;
* struct {
* ULONG Length;
* DWORD IfIndex;
* };
* };
* struct _IP_ADAPTER_ADDRESSES* Next;
* PCHAR AdapterName;
* PIP_ADAPTER_UNICAST_ADDRESS FirstUnicastAddress;
* PIP_ADAPTER_ANYCAST_ADDRESS FirstAnycastAddress;
* PIP_ADAPTER_MULTICAST_ADDRESS FirstMulticastAddress;
* PIP_ADAPTER_DNS_SERVER_ADDRESS FirstDnsServerAddress;
* PWCHAR DnsSuffix;
* PWCHAR Description;
* PWCHAR FriendlyName;
* BYTE PhysicalAddress[MAX_ADAPTER_ADDRESS_LENGTH];
* DWORD PhysicalAddressLength;
* DWORD Flags;
*
*
* typedef struct _SOCKET_ADDRESS {
* LPSOCKADDR lpSockaddr ;
* INT iSockaddrLength ;
* } SOCKET_ADDRESS, *PSOCKET_ADDRESS, FAR * LPSOCKET_ADDRESS ;
*
*
*/
int addressListOffset = 0;
byte *p = pData;
uint *pNext = null;
addressListOffset = 16;
p += addressListOffset;
/*
* typedef struct _IP_ADAPTER_UNICAST_ADDRESS {
* union {
* ULONGLONG Alignment;
* struct {
* ULONG Length;
* DWORD Flags;
* }
* };
* struct _IP_ADAPTER_UNICAST_ADDRESS* Next;
* SOCKET_ADDRESS Address;
* IP_PREFIX_ORIGIN PrefixOrigin;
* IP_SUFFIX_ORIGIN SuffixOrigin;
* IP_DAD_STATE DadState;
* ULONG ValidLifetime;
* ULONG PreferredLifetime;
* ULONG LeaseLifetime;
* } IP_ADAPTER_UNICAST_ADDRESS*, PIP_ADAPTER_UNICAST_ADDRESS;
*/
uint pAddress = (uint)*((uint *)p);
p = (byte *)pAddress;
if (p == null)
{
return;
}
UnicastIPAddressInformation info;
do
{
info = new UnicastIPAddressInformation();
// past length
p += 4;
// flags
info.AdapterFlags = (PerAdapterFlags)((int)*((int *)p));
p += 4;
// next
pNext = (uint *)*((uint *)p);
p += 4;
// socket address pointer
info.Address = GetAddressFromSocketAddressPointer(p);
p += 4;
// prefix origin
info.PrefixOrigin = (PrefixOrigin)((int)*((int *)p));
p += 4;
// suffix origin
info.SuffixOrigin = (SuffixOrigin)((int)*((int *)p));
p += 4;
// dad state
info.DuplicateAddressDetectionState = (DuplicateAddressDetectionState)((int)*((int *)p));
p += 4;
// valid lifetime
info.AddressValidLifetime = (uint)*((uint *)p);
p += 4;
// preferred lifetime
info.AddressPreferredLifetime = (uint)*((uint *)p);
p += 4;
// lease lifetime
info.DhcpLeaseLifetime = (uint)*((uint *)p);
p += 4;
p = (byte *)pNext;
addressList.InternalAdd(info);
}while (pNext != null);
}
internal unsafe static UnicastIPAddressInformationCollection ParseAddressesFromPointer(byte *pdata, string adapterName)
{
UnicastIPAddressInformationCollection addressList = new UnicastIPAddressInformationCollection(adapterName);
byte *p = pdata;
uint pNext = 0;
do
{
UnicastIPAddressInformation address = new UnicastIPAddressInformation();
pNext = (uint)*((uint *)p);
p += 4; // skip pNext
// once for the IP, once for the mask
for (int index = 0; index < 2; index++)
{
string addressString;
// see if there's an IP at all
if (*p == '\0')
{
addressString = string.Empty;
// if the address is empty skip the whole thing,
// but if the mask is empty, just skip it
if (index == 0)
{
System.Diagnostics.Debug.WriteLine("ParseAddressesFromPointer: Empty address detected");
p += 32;
}
else
{
System.Diagnostics.Debug.WriteLine("ParseAddressesFromPointer: Empty netmask detected");
address.IPv4Mask = IPAddress.None;
p += 16;
}
}
else
{
byte[] stringBytes = new byte[16];
for (int i = 0; i < stringBytes.Length; i++)
{
stringBytes[i] = *p;
p++;
}
addressString = Encoding.ASCII.GetString(stringBytes, 0, stringBytes.Length);
// trim nulls
int nullIndex = addressString.IndexOf('\0');
if (nullIndex >= 0)
{
addressString = addressString.Substring(0, nullIndex);
}
if (addressString != string.Empty)
{
// store the result
if (index == 0)
{
address.Address = IPAddress.Parse(addressString);
}
else
{
address.IPv4Mask = IPAddress.Parse(addressString);
}
}
} // else
} // for
address.NetworkTableEntryContext = *((int *)p);
p += 4; // skip the Context
if (address.Address != null)
{
addressList.InternalAdd(address);
}
} while (pNext != 0);
return(addressList);
}