wlanapi.h (wlangetAvailableNetworkList 函数)
注意
一些信息与预发行产品相关，相应产品在商业发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
重要
此 API 将受到即将于 2024 年秋季进行的操作系统行为更改的影响。 有关详细信息，请参阅 更改 Wi-Fi 访问和位置的 API 行为。
WlanGetAvailableNetworkList 函数检索无线 LAN 接口上可用网络的列表。
语法
DWORD WlanGetAvailableNetworkList(
[in] HANDLE hClientHandle,
[in] const GUID *pInterfaceGuid,
[in] DWORD dwFlags,
PVOID pReserved,
[out] PWLAN_AVAILABLE_NETWORK_LIST *ppAvailableNetworkList
);
参数
[in] hClientHandle
客户端的会话句柄，由先前对 WlanOpenHandle 函数的调用获取。
[in] pInterfaceGuid
指向要查询的无线 LAN 接口 GUID 的指针。
可以使用 WlanEnumInterfaces 函数确定在本地计算机上启用的每个无线 LAN 接口的 GUID。
[in] dwFlags
一组标志，用于控制列表中返回的网络类型。 此参数可以是这些可能值的组合。
pReserved
保留供将来使用。 此参数必须设置为 NULL。
[out] ppAvailableNetworkList
指向存储的指针，用于接收 WLAN_AVAILABLE_NETWORK_LIST 结构中可见网络的返回列表。
如果调用成功，则返回 WLAN_AVAILABLE_NETWORK_LIST 的缓冲区由 WlanGetAvailableNetworkList 函数分配。
返回值
如果函数成功，则返回值为 ERROR_SUCCESS。
如果函数失败，则返回值可能是以下返回代码之一。
| 返回代码 | 说明 |
|---|---|
|
参数不正确。 如果 hClientHandle、 pInterfaceGuid 或 ppAvailableNetworkList 参数为 NULL，则返回此错误。 如果 pReserved 不为 NULL，则返回此错误。 如果 dwFlags 参数值设置为无效的值或 hClientHandle 参数无效，也会返回此错误。 |
|
在句柄表中找不到句柄 hClientHandle 。 |
|
与接口关联的无线电已关闭。 当无线电关闭时，没有可用的网络。 |
|
各种错误代码。 |
|
没有足够的内存可用于处理此请求并为查询结果分配内存。 |
注解
当函数成功时， WlanGetAvailableNetworkList 函数为 ppAvailableNetworkList 参数指向的缓冲区中返回的可用网络列表分配内存。 不再需要缓冲区后，应通过调用 WlanFreeMemory 函数释放 ppAvailableNetworkList 参数指向的缓冲区所用的内存。
有一个修补程序可用于 Windows XP 的无线 LAN API 和 SP2，它可以帮助提高多次调用 WlanFreeMemory 和 WlanGetAvailableNetworkList 的应用程序的性能。
示例
以下示例枚举本地计算机上的无线 LAN 接口，检索每个无线 LAN 接口上的可用网络列表，并从包含WLAN_AVAILABLE_NETWORK条目的检索WLAN_AVAILABLE_NETWORK_LIST打印值。
注意 如果未安装并启动无线 LAN 服务，此示例将无法在 Windows Server 2008 和 Windows Server 2008 R2 上加载。
#ifndef UNICODE
#define UNICODE
#endif
#include <windows.h>
#include <wlanapi.h>
#include <objbase.h>
#include <wtypes.h>
#include <stdio.h>
#include <stdlib.h>
// Need to link with Wlanapi.lib and Ole32.lib
#pragma comment(lib, "wlanapi.lib")
#pragma comment(lib, "ole32.lib")
int wmain()
{
// Declare and initialize variables.
HANDLE hClient = NULL;
DWORD dwMaxClient = 2; //
DWORD dwCurVersion = 0;
DWORD dwResult = 0;
DWORD dwRetVal = 0;
int iRet = 0;
WCHAR GuidString[39] = {0};
unsigned int i, j, k;
/* variables used for WlanEnumInterfaces */
PWLAN_INTERFACE_INFO_LIST pIfList = NULL;
PWLAN_INTERFACE_INFO pIfInfo = NULL;
PWLAN_AVAILABLE_NETWORK_LIST pBssList = NULL;
PWLAN_AVAILABLE_NETWORK pBssEntry = NULL;
int iRSSI = 0;
dwResult = WlanOpenHandle(dwMaxClient, NULL, &dwCurVersion, &hClient);
if (dwResult != ERROR_SUCCESS) {
wprintf(L"WlanOpenHandle failed with error: %u\n", dwResult);
return 1;
// You can use FormatMessage here to find out why the function failed
}
dwResult = WlanEnumInterfaces(hClient, NULL, &pIfList);
if (dwResult != ERROR_SUCCESS) {
wprintf(L"WlanEnumInterfaces failed with error: %u\n", dwResult);
return 1;
// You can use FormatMessage here to find out why the function failed
} else {
wprintf(L"Num Entries: %lu\n", pIfList->dwNumberOfItems);
wprintf(L"Current Index: %lu\n", pIfList->dwIndex);
for (i = 0; i < (int) pIfList->dwNumberOfItems; i++) {
pIfInfo = (WLAN_INTERFACE_INFO *) &pIfList->InterfaceInfo[i];
wprintf(L" Interface Index[%u]:\t %lu\n", i, i);
iRet = StringFromGUID2(pIfInfo->InterfaceGuid, (LPOLESTR) &GuidString,
sizeof(GuidString)/sizeof(*GuidString));
// For c rather than C++ source code, the above line needs to be
// iRet = StringFromGUID2(&pIfInfo->InterfaceGuid, (LPOLESTR) &GuidString,
// sizeof(GuidString)/sizeof(*GuidString));
if (iRet == 0)
wprintf(L"StringFromGUID2 failed\n");
else {
wprintf(L" InterfaceGUID[%d]: %ws\n",i, GuidString);
}
wprintf(L" Interface Description[%d]: %ws", i,
pIfInfo->strInterfaceDescription);
wprintf(L"\n");
wprintf(L" Interface State[%d]:\t ", i);
switch (pIfInfo->isState) {
case wlan_interface_state_not_ready:
wprintf(L"Not ready\n");
break;
case wlan_interface_state_connected:
wprintf(L"Connected\n");
break;
case wlan_interface_state_ad_hoc_network_formed:
wprintf(L"First node in a ad hoc network\n");
break;
case wlan_interface_state_disconnecting:
wprintf(L"Disconnecting\n");
break;
case wlan_interface_state_disconnected:
wprintf(L"Not connected\n");
break;
case wlan_interface_state_associating:
wprintf(L"Attempting to associate with a network\n");
break;
case wlan_interface_state_discovering:
wprintf(L"Auto configuration is discovering settings for the network\n");
break;
case wlan_interface_state_authenticating:
wprintf(L"In process of authenticating\n");
break;
default:
wprintf(L"Unknown state %ld\n", pIfInfo->isState);
break;
}
wprintf(L"\n");
dwResult = WlanGetAvailableNetworkList(hClient,
&pIfInfo->InterfaceGuid,
0,
NULL,
&pBssList);
if (dwResult != ERROR_SUCCESS) {
wprintf(L"WlanGetAvailableNetworkList failed with error: %u\n",
dwResult);
dwRetVal = 1;
// You can use FormatMessage to find out why the function failed
} else {
wprintf(L"WLAN_AVAILABLE_NETWORK_LIST for this interface\n");
wprintf(L" Num Entries: %lu\n\n", pBssList->dwNumberOfItems);
for (j = 0; j < pBssList->dwNumberOfItems; j++) {
pBssEntry =
(WLAN_AVAILABLE_NETWORK *) & pBssList->Network[j];
wprintf(L" Profile Name[%u]: %ws\n", j, pBssEntry->strProfileName);
wprintf(L" SSID[%u]:\t\t ", j);
if (pBssEntry->dot11Ssid.uSSIDLength == 0)
wprintf(L"\n");
else {
for (k = 0; k < pBssEntry->dot11Ssid.uSSIDLength; k++) {
wprintf(L"%c", (int) pBssEntry->dot11Ssid.ucSSID[k]);
}
wprintf(L"\n");
}
wprintf(L" BSS Network type[%u]:\t ", j);
switch (pBssEntry->dot11BssType) {
case dot11_BSS_type_infrastructure :
wprintf(L"Infrastructure (%u)\n", pBssEntry->dot11BssType);
break;
case dot11_BSS_type_independent:
wprintf(L"Infrastructure (%u)\n", pBssEntry->dot11BssType);
break;
default:
wprintf(L"Other (%lu)\n", pBssEntry->dot11BssType);
break;
}
wprintf(L" Number of BSSIDs[%u]:\t %u\n", j, pBssEntry->uNumberOfBssids);
wprintf(L" Connectable[%u]:\t ", j);
if (pBssEntry->bNetworkConnectable)
wprintf(L"Yes\n");
else {
wprintf(L"No\n");
wprintf(L" Not connectable WLAN_REASON_CODE value[%u]:\t %u\n", j,
pBssEntry->wlanNotConnectableReason);
}
wprintf(L" Number of PHY types supported[%u]:\t %u\n", j, pBssEntry->uNumberOfPhyTypes);
if (pBssEntry->wlanSignalQuality == 0)
iRSSI = -100;
else if (pBssEntry->wlanSignalQuality == 100)
iRSSI = -50;
else
iRSSI = -100 + (pBssEntry->wlanSignalQuality/2);
wprintf(L" Signal Quality[%u]:\t %u (RSSI: %i dBm)\n", j,
pBssEntry->wlanSignalQuality, iRSSI);
wprintf(L" Security Enabled[%u]:\t ", j);
if (pBssEntry->bSecurityEnabled)
wprintf(L"Yes\n");
else
wprintf(L"No\n");
wprintf(L" Default AuthAlgorithm[%u]: ", j);
switch (pBssEntry->dot11DefaultAuthAlgorithm) {
case DOT11_AUTH_ALGO_80211_OPEN:
wprintf(L"802.11 Open (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_80211_SHARED_KEY:
wprintf(L"802.11 Shared (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_WPA:
wprintf(L"WPA (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_WPA_PSK:
wprintf(L"WPA-PSK (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_WPA_NONE:
wprintf(L"WPA-None (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_RSNA:
wprintf(L"RSNA (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_RSNA_PSK:
wprintf(L"RSNA with PSK(%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
default:
wprintf(L"Other (%lu)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
}
wprintf(L" Default CipherAlgorithm[%u]: ", j);
switch (pBssEntry->dot11DefaultCipherAlgorithm) {
case DOT11_CIPHER_ALGO_NONE:
wprintf(L"None (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_WEP40:
wprintf(L"WEP-40 (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_TKIP:
wprintf(L"TKIP (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_CCMP:
wprintf(L"CCMP (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_WEP104:
wprintf(L"WEP-104 (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_WEP:
wprintf(L"WEP (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
default:
wprintf(L"Other (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
}
wprintf(L" Flags[%u]:\t 0x%x", j, pBssEntry->dwFlags);
if (pBssEntry->dwFlags) {
if (pBssEntry->dwFlags & WLAN_AVAILABLE_NETWORK_CONNECTED)
wprintf(L" - Currently connected");
if (pBssEntry->dwFlags & WLAN_AVAILABLE_NETWORK_HAS_PROFILE)
wprintf(L" - Has profile");
}
wprintf(L"\n");
wprintf(L"\n");
}
}
}
}
if (pBssList != NULL) {
WlanFreeMemory(pBssList);
pBssList = NULL;
}
if (pIfList != NULL) {
WlanFreeMemory(pIfList);
pIfList = NULL;
}
return dwRetVal;
}
要求
| 要求 | 值 |
|---|---|
| 最低受支持的客户端 | Windows Vista、Windows XP SP3 [仅限桌面应用] |
| 最低受支持的服务器 | Windows Server 2008 [仅限桌面应用] |
| 目标平台 | Windows |
| 标头 | wlanapi.h (包括 Wlanapi.h) |
| Library | Wlanapi.lib |
| DLL | Wlanapi.dll |
| 可再发行组件 | 带有 SP2 的 Windows XP 无线 LAN API |