如何从 Windows 应用程序检测禁用的网络接口连接？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5917304/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How do I detect a disabled Network Interface Connection from a Windows application?
提问by T.T.T.
I would like to know when a interface has been disabled.
我想知道接口何时被禁用。
If I go into the windows manager and disable one of the 2 enabled connections, GetIfTable() only returns status about 1 interface, it no longer sees the disconnected one. (Returns 1 table)
如果我进入 Windows 管理器并禁用 2 个启用的连接之一，GetIfTable() 只返回关于 1 个接口的状态，它不再看到断开连接的一个。（返回 1 个表）
How can I get something to return that the disabled interface still existsbut is currentlydisabled?
我怎样才能得到一些东西来返回禁用的接口仍然存在但当前被禁用？
Thanks.
谢谢。
http://msdn.microsoft.com/en-us/library/aa365943%28VS.85%29.aspx
http://msdn.microsoft.com/en-us/library/aa365943%28VS.85%29.aspx
回答by sehe
I think you would just need to read the registry.
我认为您只需要阅读注册表即可。
For example, this is a snippet found on the web of what things should look like:
例如，这是在网络上找到的一段关于事物应该是什么样子的片段：
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\{1E6AF554-25FF-40FC-9CEE-EB899472C5A3}\Connection]
"PnpInstanceID"="PCI\VEN_14E4&DEV_1696&SUBSYS_12BC103C&REV_03\4&3A321F38&0&10F0"
"MediaSubType"=dword:00000001
"Name"="Lan Name"
"ShowIcon"=dword:00000000
"IpCheckingEnabled"=dword:00000001
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\{1E6AF554-25FF-40FC-9CEE-EB899472C5A3}\Connection]
"PnpInstanceID"="PCI\VEN_14E4&DEV_1696&SUBSYS_12BC103C&REV_03\4&3A321F38&0&10F0"
"MediaSubType"=dword:00000001
"Name"="Lan Name"
"ShowIcon"=dword:00000000
"IpCheckingEnabled"=dword:00000001
回答by Aaron Klotz
How about using the interfaces from netcon.has illustrated in this example? The code in that example enables and disables the interface programmatically, but I've made some modifications so that you could query the status instead:
如何使用本示例中netcon.h所示的接口？该示例中的代码以编程方式启用和禁用接口，但我进行了一些修改，以便您可以查询状态：
#include <netcon.h>
// wszName is the name of the connection as appears in Network Connections folder
// set bEnable to true to enable and to false to disable
bool GetConnectionStatus(LPCWSTR wszName, bool *status)
{
bool result = false;
if (!status)
return false;
typedef void (__stdcall * LPNcFreeNetconProperties)(NETCON_PROPERTIES* pProps);
HMODULE hmod = LoadLibrary("netshell.dll");
if (!hmod)
return false;
LPNcFreeNetconProperties NcFreeNetconProperties =
(LPNcFreeNetconProperties)GetProcAddress(hmod, "NcFreeNetconProperties");
if (!NcFreeNetconProperties )
return false;
INetConnectionManager * pMan = 0;
HRESULT hres = CoCreateInstance(CLSID_ConnectionManager,
0,
CLSCTX_ALL,
__uuidof(INetConnectionManager),
(void**)&pMan);
if (SUCCEEDED(hres))
{
IEnumNetConnection * pEnum = 0;
hres = pMan->EnumConnections(NCME_DEFAULT, &pEnum);
if (SUCCEEDED(hres))
{
INetConnection * pCon = 0;
ULONG count;
while (pEnum->Next(1, &pCon, &count) == S_OK && !done)
{
NETCON_PROPERTIES * pProps = 0;
hres = pCon->GetProperties(&pProps);
if (SUCCEEDED(hres))
{
if (wcscmp(pProps->pszwName,wszName) == 0)
{
*status = pProps->Status == NCS_CONNECTED;
}
NcFreeNetconProperties(pProps);
}
pCon->Release();
}
pEnum->Release();
}
pMan->Release();
}
FreeLibrary(hmod);
return result;
}
回答by RRUZ
Another option is use the Win32_NetworkAdapterWMI Class , check the NetConnectionStatusand NetEnabledproperties.
另一种选择是使用Win32_NetworkAdapterWMI Class ，检查NetConnectionStatus和NetEnabled属性。
回答by Lior Kogan
The IP_ADAPTER_ADDRESSES structure hold an OperStatus member. See MSDN documentation
IP_ADAPTER_ADDRESSES 结构包含一个 OperStatus 成员。请参阅MSDN 文档
I think it can be used to detect disabled NICs. I didn't try.
我认为它可用于检测禁用的 NIC。我没有尝试。
Here is a test code:
这是一个测试代码：
ULONG nFlags= 0;
if (WINVER>=0x0600) // flag supported in Vista and later
nFlags= 0x0100; // GAA_FLAG_INCLUDE_ALL_INTERFACES
// during system initialization, GetAdaptersAddresses may return ERROR_BUFFER_OVERFLOW and supply nLen,
// but in a subsequent call it may return ERROR_BUFFER_OVERFLOW and supply greater nLen !
ULONG nLen= sizeof (IP_ADAPTER_ADDRESSES);
BYTE* pBuf= NULL;
DWORD nErr= 0 ;
do
{
delete[] pBuf;
pBuf= new BYTE[nLen];
nErr= ::GetAdaptersAddresses(AF_INET, nFlags, NULL, (IP_ADAPTER_ADDRESSES*&)pBuf, &nLen);
}
while (ERROR_BUFFER_OVERFLOW == nErr);
if (NO_ERROR != nErr)
{
delete[] pBuf;
TCHAR czErr[300]= _T("GetAdaptersAddresses failed. ");
REPORT(REP_ERROR, _T("GetAdapterInfo"), GetSysErrStr(nErr, czErr, 300));
return false;
}
const IP_ADAPTER_ADDRESSES* pAdaptersAddresses= (IP_ADAPTER_ADDRESSES*&)pBuf;
while (pAdaptersAddresses) // for each adapter
{
TCHAR czAdapterName [500]; str_cpy(czAdapterName , 500, pAdaptersAddresses->AdapterName );
TCHAR czDesc [500]; str_cpy(czDesc , 500, pAdaptersAddresses->Description );
TCHAR czFriendlyName[500]; str_cpy(czFriendlyName, 500, pAdaptersAddresses->FriendlyName);
const IF_OPER_STATUS& Stat= pAdaptersAddresses->OperStatus; // 1:up, 2:down...
...
pAdaptersAddresses= pAdaptersAddresses->Next;
}
回答by Lior Kogan
According to this CodeGuru forum message, you can query WMI for this information (A C# code is provided there).
根据此 CodeGuru 论坛消息，您可以查询 WMI 以获取此信息（那里提供了 AC# 代码）。
To query WMI using C++, see these two links:
要使用 C++ 查询 WMI，请参阅以下两个链接：
回答by STTR
command-line:
命令行：
wmic NIC where(ConfigManagerErrorCode=22)get Description,Index,NetConnectionID,PNPDeviceID
Output:
输出：
Description Index NetConnectionID PNPDeviceID
Broadcom 802.11g Network Adapter 8 WiFi PCI\VEN_14E4&DEV_4320&SUBSYS_041814E4&REV_03&31B6CD7&0&00F0
1394 Net Adapter 13 1394 V1394\NIC1394B9E0F31E8C00
TAP-Win32 Adapter V9 14 Steganos Internet Anonym 2012 VPN Adapter ROOT\NET##代码##00
VirtualBox Host-Only Ethernet Adapter 24 VirtualBox Host-Only Network ROOT\NET##代码##01
