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 api 行为的 Wi-Fi 访问和位置。
WlanQueryInterface 函数查询指定接口的各种参数。
语法
DWORD WlanQueryInterface(
[in] HANDLE hClientHandle,
[in] const GUID *pInterfaceGuid,
[in] WLAN_INTF_OPCODE OpCode,
PVOID pReserved,
[out] PDWORD pdwDataSize,
[out] PVOID *ppData,
[out, optional] PWLAN_OPCODE_VALUE_TYPE pWlanOpcodeValueType
);
参数
[in] hClientHandle
客户端的会话句柄，由上一次对 WlanOpenHandle 函数的调用获取。
[in] pInterfaceGuid
要查询的接口的 GUID。
[in] OpCode
一个WLAN_INTF_OPCODE值，该值指定要查询的参数。 下表列出了 ppData 中参数的有效常量和数据类型。
| WLAN_INTF_OPCODE | ppData 数据类型 |
|---|---|
| wlan_intf_opcode_autoconf_enabled | BOOL |
| wlan_intf_opcode_background_scan_enabled | BOOL |
| wlan_intf_opcode_bss_type | DOT11_BSS_TYPE |
| wlan_intf_opcode_certified_safe_mode | BOOL |
| wlan_intf_opcode_channel_number | ULONG |
| wlan_intf_opcode_current_connection | WLAN_CONNECTION_ATTRIBUTES |
| wlan_intf_opcode_current_operation_mode | ULONG |
| wlan_intf_opcode_hosted_network_capable | BOOL |
| wlan_intf_opcode_interface_state | WLAN_INTERFACE_STATE |
| wlan_intf_opcode_management_frame_protection_capable | BOOL |
| wlan_intf_opcode_media_streaming_mode | BOOL |
| wlan_intf_opcode_qos_info | WLAN_QOS_INFO |
| wlan_intf_opcode_radio_state | WLAN_RADIO_STATE |
| wlan_intf_opcode_realtime_connection_quality | WLAN_REALTIME_CONNECTION_QUALITY |
| wlan_intf_opcode_rssi | LONG |
| wlan_intf_opcode_secondary_sta_interfaces | WLAN_INTERFACE_INFO_LIST |
| wlan_intf_opcode_secondary_sta_synchronized_connections | BOOL |
| wlan_intf_opcode_statistics | WLAN_STATISTICS |
| wlan_intf_opcode_supported_adhoc_auth_cipher_pairs | WLAN_AUTH_CIPHER_PAIR_LIST |
| wlan_intf_opcode_supported_country_or_region_string_list | WLAN_COUNTRY_OR_REGION_STRING_LIST |
| wlan_intf_opcode_supported_infrastructure_auth_cipher_pairs | WLAN_AUTH_CIPHER_PAIR_LIST |
| wlan_intf_opcode_supported_safe_mode | BOOL |
具有 SP3 的 Windows XP 和适用于 SP2 的 Windows XP 的无线 LAN API： 只有 wlan_intf_opcode_autoconf_enabled、 wlan_intf_opcode_bss_type、 wlan_intf_opcode_interface_state和 wlan_intf_opcode_current_connection 常量有效。
pReserved
保留供将来使用。 必须设置为 NULL。
[out] pdwDataSize
ppData 参数的大小（以字节为单位）。
[out] ppData
指向内存位置的指针，该位置包含 OpCode 参数指定的参数的查询值。
注意 如果 OpCode 设置为 wlan_intf_opcode_autoconf_enabled、 wlan_intf_opcode_background_scan_enabled 或 wlan_intf_opcode_media_streaming_mode，则 ppData 引用的指针可能指向整数值。 如果 ppData 引用的指针指向 0，则整数值应转换为布尔值 FALSE。 如果 ppData 引用的指针指向非零整数，则应将整数值转换为布尔值 TRUE。
[out, optional] pWlanOpcodeValueType
如果传递了非 NULL 值，则指向指定返回的 opcode 类型的 WLAN_OPCODE_VALUE_TYPE 值。 此参数可以为 NULL。
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。
注解
调用方负责使用 WlanFreeMemory 释放为 ppData 分配的内存。
当 OpCode 设置为 wlan_intf_opcode_current_operation_mode 时， WlanQueryInterface 将查询无线接口的当前操作模式。 有关操作模式的详细信息，请参阅 本机 802.11 操作模式。 支持两种操作模式： DOT11_OPERATION_MODE_EXTENSIBLE_STATION 和 DOT11_OPERATION_MODE_NETWORK_MONITOR。 操作模式常量在头文件 Windot11.h 中定义。 ppData 将指向这两个值之一。
示例
以下示例枚举本地计算机上的无线 LAN 接口，查询接口上的 WLAN_CONNECTION_ATTRIBUTES 的每个接口，并从检索到 的 WLAN_CONNECTION_ATTRIBUTES 结构中输出值。
有关使用 WlanQueryInterface 函数的另一个示例，请参阅 WLAN_RADIO_STATE 结构。
注意 如果未安装并启动无线 LAN 服务，本示例将无法在 Windows Server 2008 和 Windows Server 2008 R2 上加载。
#ifndef UNICODE
#define UNICODE
#endif
#include <windows.h>
#include <wlanapi.h>
#include <Windot11.h> // for DOT11_SSID struct
#include <objbase.h>
#include <wtypes.h>
//#include <wchar.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, k;
// variables used for WlanEnumInterfaces
PWLAN_INTERFACE_INFO_LIST pIfList = NULL;
PWLAN_INTERFACE_INFO pIfInfo = NULL;
// variables used for WlanQueryInterfaces for opcode = wlan_intf_opcode_current_connection
PWLAN_CONNECTION_ATTRIBUTES pConnectInfo = NULL;
DWORD connectInfoSize = sizeof(WLAN_CONNECTION_ATTRIBUTES);
WLAN_OPCODE_VALUE_TYPE opCode = wlan_opcode_value_type_invalid;
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]:\t %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");
// If interface state is connected, call WlanQueryInterface
// to get current connection attributes
if (pIfInfo->isState == wlan_interface_state_connected) {
dwResult = WlanQueryInterface(hClient,
&pIfInfo->InterfaceGuid,
wlan_intf_opcode_current_connection,
NULL,
&connectInfoSize,
(PVOID *) &pConnectInfo,
&opCode);
if (dwResult != ERROR_SUCCESS) {
wprintf(L"WlanQueryInterface failed with error: %u\n", dwResult);
dwRetVal = 1;
// You can use FormatMessage to find out why the function failed
} else {
wprintf(L" WLAN_CONNECTION_ATTRIBUTES for this interface\n");
wprintf(L" Interface State:\t ");
switch (pConnectInfo->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" Connection Mode:\t ");
switch (pConnectInfo->wlanConnectionMode) {
case wlan_connection_mode_profile:
wprintf(L"A profile is used to make the connection\n");
break;
case wlan_connection_mode_temporary_profile:
wprintf(L"A temporary profile is used to make the connection\n");
break;
case wlan_connection_mode_discovery_secure:
wprintf(L"Secure discovery is used to make the connection\n");
break;
case wlan_connection_mode_discovery_unsecure:
wprintf(L"Unsecure discovery is used to make the connection\n");
break;
case wlan_connection_mode_auto:
wprintf
(L"connection initiated by wireless service automatically using a persistent profile\n");
break;
case wlan_connection_mode_invalid:
wprintf(L"Invalid connection mode\n");
break;
default:
wprintf(L"Unknown connection mode %ld\n",
pConnectInfo->wlanConnectionMode);
break;
}
wprintf(L" Profile name used:\t %ws\n", pConnectInfo->strProfileName);
wprintf(L" Association Attributes for this connection\n");
wprintf(L" SSID:\t\t ");
if (pConnectInfo->wlanAssociationAttributes.dot11Ssid.uSSIDLength == 0)
wprintf(L"\n");
else {
for (k = 0;
k < pConnectInfo->wlanAssociationAttributes.dot11Ssid.uSSIDLength;
k++) {
wprintf(L"%c",
(int) pConnectInfo->wlanAssociationAttributes.dot11Ssid.
ucSSID[k]);
}
wprintf(L"\n");
}
wprintf(L" BSS Network type:\t ");
switch (pConnectInfo->wlanAssociationAttributes.dot11BssType) {
case dot11_BSS_type_infrastructure:
wprintf(L"Infrastructure\n");
break;
case dot11_BSS_type_independent:
wprintf(L"Infrastructure\n");
break;
default:
wprintf(L"Other = %lu\n",
pConnectInfo->wlanAssociationAttributes.dot11BssType);
break;
}
wprintf(L" MAC address:\t ");
for (k = 0; k < sizeof (pConnectInfo->wlanAssociationAttributes.dot11Bssid);
k++) {
if (k == 5)
wprintf(L"%.2X\n",
pConnectInfo->wlanAssociationAttributes.dot11Bssid[k]);
else
wprintf(L"%.2X-",
pConnectInfo->wlanAssociationAttributes.dot11Bssid[k]);
}
wprintf(L" PHY network type:\t ");
switch (pConnectInfo->wlanAssociationAttributes.dot11PhyType) {
case dot11_phy_type_fhss:
wprintf(L"Frequency-hopping spread-spectrum (FHSS)\n");
break;
case dot11_phy_type_dsss:
wprintf(L"Direct sequence spread spectrum (DSSS)\n");
break;
case dot11_phy_type_irbaseband:
wprintf(L"Infrared (IR) baseband\n");
break;
case dot11_phy_type_ofdm:
wprintf(L"Orthogonal frequency division multiplexing (OFDM)\n");
break;
case dot11_phy_type_hrdsss:
wprintf(L"High-rate DSSS (HRDSSS) = \n");
break;
case dot11_phy_type_erp:
wprintf(L"Extended rate PHY type\n");
break;
case dot11_phy_type_ht:
wprintf(L"802.11n PHY type\n");
break;
default:
wprintf(L"Unknown = %lu\n",
pConnectInfo->wlanAssociationAttributes.dot11PhyType);
break;
}
wprintf(L" PHY index:\t\t %u\n",
pConnectInfo->wlanAssociationAttributes.uDot11PhyIndex);
wprintf(L" Signal Quality:\t %d\n",
pConnectInfo->wlanAssociationAttributes.wlanSignalQuality);
wprintf(L" Receiving Rate:\t %ld\n",
pConnectInfo->wlanAssociationAttributes.ulRxRate);
wprintf(L" Transmission Rate:\t %ld\n",
pConnectInfo->wlanAssociationAttributes.ulTxRate);
wprintf(L"\n");
wprintf(L" Security Attributes for this connection\n");
wprintf(L" Security enabled:\t ");
if (pConnectInfo->wlanSecurityAttributes.bSecurityEnabled == 0)
wprintf(L"No\n");
else
wprintf(L"Yes\n");
wprintf(L" 802.1X enabled:\t ");
if (pConnectInfo->wlanSecurityAttributes.bOneXEnabled == 0)
wprintf(L"No\n");
else
wprintf(L"Yes\n");
wprintf(L" Authentication Algorithm: ");
switch (pConnectInfo->wlanSecurityAttributes.dot11AuthAlgorithm) {
case DOT11_AUTH_ALGO_80211_OPEN:
wprintf(L"802.11 Open\n");
break;
case DOT11_AUTH_ALGO_80211_SHARED_KEY:
wprintf(L"802.11 Shared\n");
break;
case DOT11_AUTH_ALGO_WPA:
wprintf(L"WPA\n");
break;
case DOT11_AUTH_ALGO_WPA_PSK:
wprintf(L"WPA-PSK\n");
break;
case DOT11_AUTH_ALGO_WPA_NONE:
wprintf(L"WPA-None\n");
break;
case DOT11_AUTH_ALGO_RSNA:
wprintf(L"RSNA\n");
break;
case DOT11_AUTH_ALGO_RSNA_PSK:
wprintf(L"RSNA with PSK\n");
break;
default:
wprintf(L"Other (%lu)\n", pConnectInfo->wlanSecurityAttributes.dot11AuthAlgorithm);
break;
}
wprintf(L" Cipher Algorithm:\t ");
switch (pConnectInfo->wlanSecurityAttributes.dot11CipherAlgorithm) {
case DOT11_CIPHER_ALGO_NONE:
wprintf(L"None\n");
break;
case DOT11_CIPHER_ALGO_WEP40:
wprintf(L"WEP-40\n");
break;
case DOT11_CIPHER_ALGO_TKIP:
wprintf(L"TKIP\n");
break;
case DOT11_CIPHER_ALGO_CCMP:
wprintf(L"CCMP\n");
break;
case DOT11_CIPHER_ALGO_WEP104:
wprintf(L"WEP-104\n");
break;
case DOT11_CIPHER_ALGO_WEP:
wprintf(L"WEP\n");
break;
default:
wprintf(L"Other (0x%x)\n", pConnectInfo->wlanSecurityAttributes.dot11CipherAlgorithm);
break;
}
wprintf(L"\n");
}
}
}
}
if (pConnectInfo != NULL) {
WlanFreeMemory(pConnectInfo);
pConnectInfo = 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 和 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 | 适用于 Windows XP 的无线 LAN API SP2 |