Obtain Nic information through ipconfig in Windows

In network programming, we may sometimes use MAC addresses. If we use VC ++, we can useUchar NetBIOS (
PNCBPNCB/* Pointer to the network control block */)Obtain;However, in actual application, I found that it does not work every time. in a notebook with a wireless network card, I can't find a mac on a notebook with a virtual machine. Maybe I have no idea about the usage of this function!

I used a Java program to obtain Mac information from a common method and ipconfig to obtain information about all NICs. Next we will look at the specific method.

First, we define a structure to save the NIC information:

Typedef struct _ tagadapterinfo {
Cstring description; // Nic description
Cstring physicaladdr; // Mac
Cstring ipaddr [64]; // a maximum of 64 IP addresses
Cstring subnetmask [64]; // each IP Address has a maximum of 64 masks.
Cstring gateway; // The default gateway.
Long lipnum; // number of IP addresses corresponding to the NIC
} Adapterinfo, * padapterinfo;

We define a method to obtain information about all NICs on the local machine:

int GetAllAdapterInfo(CArray<AdapterInfo,AdapterInfo>& AdapterInfoList,

CString& Error);

Let's take a look at the implementation below:

int CTestDlg::GetAllAdapterInfo(

Carray <adapterinfo, adapterinfo> & adapterinfolist, cstring error)
{
Handle hread, hwrite; // defines the input and output handle.
Cstring strerror; // error message
Cstring strcon, strbuf;
Bool nreturn;
Char buffer [2048] = {0 };
Lpstr P = "ipconfig/all ";
Unsigned long lnreadnum;
Int nindex = 0, from = 0, To = 0, nloop = 0;
Startupinfo SA;
Process_information pinfo;
Security_attributes sapipe;
Sapipe. nlength = sizeof (security_attributes );
Sapipe. lpsecuritydescriptor = NULL;
Sapipe. binherithandle = true;
If (! Createpipe (& hread, & hwrite, & sapipe, 0) // create an MPS queue
{
Strerror. Format ("create pipe errorcode: % d", getlasterror ());
Error = strerror;
Return 1;
}
Memset (& SA, 0, sizeof (SA ));
SA. cb = sizeof (SA );
SA. dwflags = startf_useshowwindow | startf_usestdhandles;
SA. wshowwindow = sw_hide;
SA. hstdoutput = hwrite;
SA. hstderror = hwrite;

// Create a process
Nreturn =: CreateProcess (null, P, & sapipe, & sapipe,
True, 0, null, null, & SA, & pinfo );
If (! Nreturn)
{
Strerror. Format ("create process errorcode: % d", getlasterror ());
Error = strerror;
Return 2;
}
// Sleep (1, 1000 );
Closehandle (pinfo. hthread );
Closehandle (pinfo. hprocess );
Closehandle (hwrite );
// Read is the output of the MPs queue.
Do {
Memset (buffer, 0,2048 );
Nreturn = readfile (hread, buffer, max_path, & lnreadnum, null );
If (nreturn)
{
Strbuf. Format ("% s", buffer );
Strcon + = strbuf;
}

} While (nreturn & lnreadnum );

Adapterinfo Info;

// Find the NIC information in the output information

Do
{
Nindex = strcon. Find ("Description", nindex );
If (nindex <=-1)
{
Break;
}
From = strcon. Find (":", nindex) + 2;
To = strcon. Find ("/N", from );
Info. Description = strcon. mid (from, to-from-1 );
Nindex =;
Nindex = strcon. Find ("physical address", nindex );
From = strcon. Find (":", nindex) + 2;
To = strcon. Find ("/N", from );
Info. physicaladdr = strcon. mid (from, to-from-1 );
Nindex =;
Nloop = 0;
While (nloop <64)
{
Nindex = strcon. Find ("ip address", nindex );
If (nindex <=-1)
{
Break;
}
From = strcon. Find (":", nindex) + 2;
To = strcon. Find ("/N", from );
Info. ipaddr [nloop] = strcon. mid (from, to-from-1 );
Nindex =;
Nindex = strcon. Find ("subnet mask", nindex );
From = strcon. Find (":", nindex) + 2;
To = strcon. Find ("/N", from );
Info. subnetmask [nloop] = strcon. mid (from, to-from-1 );
Nloop ++;
}
Info. lipnum = nloop;
Nindex =;
Nindex = strcon. Find ("Default Gateway", nindex );
From = strcon. Find (":", nindex) + 2;
To = strcon. Find ("/N", from );
Info. Gateway = strcon. mid (from, to-from-1 );
Adapterinfolist. Add (Info );
} While (true );
Return 0;
}
The method is just a basic application of pipelines. Let's share it with you! In addition, we can use the IP help function to obtain the IP address.