怎么判断无线网卡是否连接的具体代码
时间: 2023-12-11 17:05:37 浏览: 35
判断无线网卡是否连接的代码可以使用Windows提供的Wlanapi.h头文件中的函数。以下是一个简单的示例代码,可以检查指定无线网卡是否已连接:
```c
#include <windows.h>
#include <wlanapi.h>
#include <wtypes.h>
#include <stdio.h>
#pragma comment(lib, "wlanapi.lib")
int main()
{
HANDLE handle = NULL;
DWORD version;
DWORD result;
WLAN_INTERFACE_INFO_LIST* pIfList = NULL;
WLAN_INTERFACE_INFO* pIfInfo = NULL;
WLAN_CONNECTION_ATTRIBUTES connAttr;
// 获取WLAN API版本
result = WlanOpenHandle(2, NULL, &version, &handle);
if (result != ERROR_SUCCESS) {
printf("WlanOpenHandle failed with error %u\n", result);
return 1;
}
// 获取无线网卡列表
result = WlanEnumInterfaces(handle, NULL, &pIfList);
if (result != ERROR_SUCCESS) {
printf("WlanEnumInterfaces failed with error %u\n", result);
WlanCloseHandle(handle, NULL);
return 1;
}
// 检查指定无线网卡是否已连接
pIfInfo = &pIfList->InterfaceInfo[0]; // 假设要检查第一个无线网卡
result = WlanQueryInterface(handle, &pIfInfo->InterfaceGuid, wlan_intf_opcode_current_connection, NULL, &connAttr.wlanAssociationAttributes, NULL);
if (result == ERROR_SUCCESS) {
printf("%ws is connected to %ws\n", pIfInfo->strInterfaceDescription, connAttr.wlanAssociationAttributes.dot11Ssid.ucSSID);
} else if (result == ERROR_INVALID_PARAMETER) {
printf("%ws is not connected\n", pIfInfo->strInterfaceDescription);
} else {
printf("WlanQueryInterface failed with error %u\n", result);
}
// 释放资源
if (pIfList != NULL) {
WlanFreeMemory(pIfList);
pIfList = NULL;
}
WlanCloseHandle(handle, NULL);
return 0;
}
```
这个示例代码使用了Wlanapi.h头文件中的WlanOpenHandle、WlanEnumInterfaces、WlanQueryInterface、WlanFreeMemory和WlanCloseHandle函数。如果WlanQueryInterface函数返回成功,则说明指定的无线网卡已连接。否则,如果返回ERROR_INVALID_PARAMETER,则说明指定的无线网卡未连接。