// method to return an array of the active Network adapters on your system
private AdaptersInfo[] EnumerateAdapters()
{
int adapterIndex = 0; // the current adapter index
bool validAdapter = true; // are we still getting a valid adapter
// we are going to look for up to 10 adapters
// temp array to hold the adapters that we find
AdaptersInfo[] aiTemp = new AdaptersInfo[10];
//start a loop while we look for adapters one by one starting at index 0
do
{
// buffer to hold the adapter information that we get
byte[] buf = new byte[1024];
// uint to hold the number of bytes that we read
uint iBytesRead = 0;
// NDISPROT_QUERY_BINDING structure containing the index
// that we want to query for
NDISPROT_QUERY_BINDING ndisprot = new NDISPROT_QUERY_BINDING();
ndisprot.BindingIndex = (ulong)adapterIndex;
// uint to hold the length of the ndisprot
uint bufsize = (uint)Marshal.SizeOf(ndisprot);
// perform the following in and unsafe context
unsafe
{
// create a void pointer to buf
fixed (void* vpBuf = buf)
{
// use the DeviceIoControl API to query the adapters
validAdapter = DeviceIoControl(this.m_iHandle,
IOCTL_NDISPROT_QUERY_BINDING, (void*)&ndisprot,
bufsize, vpBuf, (uint)buf.Length,
&iBytesRead, 0);
}
}
// if DeviceIoControl returns false, then there are no
// more valid adapters, so break the loop
if (!validAdapter) break;
// add the adapter information to the temp AdaptersInfo struct array
// first, get a string containing the info from buf
string tmpinfo = Encoding.Unicode.GetString(buf).Trim((char)0x00);
tmpinfo = tmpinfo.Substring(tmpinfo.IndexOf("\\"));
// add the info to aiTemp
aiTemp[adapterIndex].Index = adapterIndex;
aiTemp[adapterIndex].AdapterID = tmpinfo.Substring(0,
tmpinfo.IndexOf("}")+1);
aiTemp[adapterIndex].AdapterName = tmpinfo.Substring(
tmpinfo.IndexOf("}")+1).Trim((char)0x00);
// Increment the adapterIndex count
adapterIndex++;
// loop while we have a valid adapter
}while (validAdapter || adapterIndex < 10);
// Copy the temp adapter struct to the return struct
AdaptersInfo[] aiReturn = new AdaptersInfo[adapterIndex];
for (int i=0;i<aiReturn.Length;i++)
aiReturn[i] = aiTemp[i];
// return aiReturn struct
return aiReturn;
}
