wpa_supplicant: Initial Revision 0.8.X
Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date: Thu Apr 21 20:41:01 2011 +0300
Enable CONFIG_DRIVER_NL80211=y in the default configuration
nl80211 should be preferred over WEXT with any recent Linux
kernel version.
Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/drivers/ndis_events.c b/src/drivers/ndis_events.c
new file mode 100644
index 0000000..f6eaa7c
--- /dev/null
+++ b/src/drivers/ndis_events.c
@@ -0,0 +1,808 @@
+/*
+ * ndis_events - Receive NdisMIndicateStatus() events using WMI
+ * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#define _WIN32_WINNT 0x0400
+
+#include "includes.h"
+
+#ifndef COBJMACROS
+#define COBJMACROS
+#endif /* COBJMACROS */
+#include <wbemidl.h>
+
+#include "common.h"
+
+
+static int wmi_refcnt = 0;
+static int wmi_first = 1;
+
+struct ndis_events_data {
+ IWbemObjectSink sink;
+ IWbemObjectSinkVtbl sink_vtbl;
+
+ IWbemServices *pSvc;
+ IWbemLocator *pLoc;
+
+ HANDLE read_pipe, write_pipe, event_avail;
+ UINT ref;
+ int terminating;
+ char *ifname; /* {GUID..} */
+ WCHAR *adapter_desc;
+};
+
+#define BstrAlloc(x) (x) ? SysAllocString(x) : NULL
+#define BstrFree(x) if (x) SysFreeString(x)
+
+/* WBEM / WMI wrapper functions, to perform in-place conversion of WCHARs to
+ * BSTRs */
+HRESULT STDMETHODCALLTYPE call_IWbemServices_ExecQuery(
+ IWbemServices *pSvc, LPCWSTR strQueryLanguage, LPCWSTR strQuery,
+ long lFlags, IWbemContext *pCtx, IEnumWbemClassObject **ppEnum)
+{
+ BSTR bsQueryLanguage, bsQuery;
+ HRESULT hr;
+
+ bsQueryLanguage = BstrAlloc(strQueryLanguage);
+ bsQuery = BstrAlloc(strQuery);
+
+ hr = IWbemServices_ExecQuery(pSvc, bsQueryLanguage, bsQuery, lFlags,
+ pCtx, ppEnum);
+
+ BstrFree(bsQueryLanguage);
+ BstrFree(bsQuery);
+
+ return hr;
+}
+
+
+HRESULT STDMETHODCALLTYPE call_IWbemServices_ExecNotificationQueryAsync(
+ IWbemServices *pSvc, LPCWSTR strQueryLanguage, LPCWSTR strQuery,
+ long lFlags, IWbemContext *pCtx, IWbemObjectSink *pResponseHandler)
+{
+ BSTR bsQueryLanguage, bsQuery;
+ HRESULT hr;
+
+ bsQueryLanguage = BstrAlloc(strQueryLanguage);
+ bsQuery = BstrAlloc(strQuery);
+
+ hr = IWbemServices_ExecNotificationQueryAsync(pSvc, bsQueryLanguage,
+ bsQuery, lFlags, pCtx,
+ pResponseHandler);
+
+ BstrFree(bsQueryLanguage);
+ BstrFree(bsQuery);
+
+ return hr;
+}
+
+
+HRESULT STDMETHODCALLTYPE call_IWbemLocator_ConnectServer(
+ IWbemLocator *pLoc, LPCWSTR strNetworkResource, LPCWSTR strUser,
+ LPCWSTR strPassword, LPCWSTR strLocale, long lSecurityFlags,
+ LPCWSTR strAuthority, IWbemContext *pCtx, IWbemServices **ppNamespace)
+{
+ BSTR bsNetworkResource, bsUser, bsPassword, bsLocale, bsAuthority;
+ HRESULT hr;
+
+ bsNetworkResource = BstrAlloc(strNetworkResource);
+ bsUser = BstrAlloc(strUser);
+ bsPassword = BstrAlloc(strPassword);
+ bsLocale = BstrAlloc(strLocale);
+ bsAuthority = BstrAlloc(strAuthority);
+
+ hr = IWbemLocator_ConnectServer(pLoc, bsNetworkResource, bsUser,
+ bsPassword, bsLocale, lSecurityFlags,
+ bsAuthority, pCtx, ppNamespace);
+
+ BstrFree(bsNetworkResource);
+ BstrFree(bsUser);
+ BstrFree(bsPassword);
+ BstrFree(bsLocale);
+ BstrFree(bsAuthority);
+
+ return hr;
+}
+
+
+enum event_types { EVENT_CONNECT, EVENT_DISCONNECT, EVENT_MEDIA_SPECIFIC,
+ EVENT_ADAPTER_ARRIVAL, EVENT_ADAPTER_REMOVAL };
+
+static int ndis_events_get_adapter(struct ndis_events_data *events,
+ const char *ifname, const char *desc);
+
+
+static int ndis_events_constructor(struct ndis_events_data *events)
+{
+ events->ref = 1;
+
+ if (!CreatePipe(&events->read_pipe, &events->write_pipe, NULL, 512)) {
+ wpa_printf(MSG_ERROR, "CreatePipe() failed: %d",
+ (int) GetLastError());
+ return -1;
+ }
+ events->event_avail = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (events->event_avail == NULL) {
+ wpa_printf(MSG_ERROR, "CreateEvent() failed: %d",
+ (int) GetLastError());
+ CloseHandle(events->read_pipe);
+ CloseHandle(events->write_pipe);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static void ndis_events_destructor(struct ndis_events_data *events)
+{
+ CloseHandle(events->read_pipe);
+ CloseHandle(events->write_pipe);
+ CloseHandle(events->event_avail);
+ IWbemServices_Release(events->pSvc);
+ IWbemLocator_Release(events->pLoc);
+ if (--wmi_refcnt == 0)
+ CoUninitialize();
+}
+
+
+static HRESULT STDMETHODCALLTYPE
+ndis_events_query_interface(IWbemObjectSink *this, REFIID riid, void **obj)
+{
+ *obj = NULL;
+
+ if (IsEqualIID(riid, &IID_IUnknown) ||
+ IsEqualIID(riid, &IID_IWbemObjectSink)) {
+ *obj = this;
+ IWbemObjectSink_AddRef(this);
+ return NOERROR;
+ }
+
+ return E_NOINTERFACE;
+}
+
+
+static ULONG STDMETHODCALLTYPE ndis_events_add_ref(IWbemObjectSink *this)
+{
+ struct ndis_events_data *events = (struct ndis_events_data *) this;
+ return ++events->ref;
+}
+
+
+static ULONG STDMETHODCALLTYPE ndis_events_release(IWbemObjectSink *this)
+{
+ struct ndis_events_data *events = (struct ndis_events_data *) this;
+
+ if (--events->ref != 0)
+ return events->ref;
+
+ ndis_events_destructor(events);
+ wpa_printf(MSG_DEBUG, "ndis_events: terminated");
+ os_free(events->adapter_desc);
+ os_free(events->ifname);
+ os_free(events);
+ return 0;
+}
+
+
+static int ndis_events_send_event(struct ndis_events_data *events,
+ enum event_types type,
+ char *data, size_t data_len)
+{
+ char buf[512], *pos, *end;
+ int _type;
+ DWORD written;
+
+ end = buf + sizeof(buf);
+ _type = (int) type;
+ os_memcpy(buf, &_type, sizeof(_type));
+ pos = buf + sizeof(_type);
+
+ if (data) {
+ if (2 + data_len > (size_t) (end - pos)) {
+ wpa_printf(MSG_DEBUG, "Not enough room for send_event "
+ "data (%d)", data_len);
+ return -1;
+ }
+ *pos++ = data_len >> 8;
+ *pos++ = data_len & 0xff;
+ os_memcpy(pos, data, data_len);
+ pos += data_len;
+ }
+
+ if (WriteFile(events->write_pipe, buf, pos - buf, &written, NULL)) {
+ SetEvent(events->event_avail);
+ return 0;
+ }
+ wpa_printf(MSG_INFO, "WriteFile() failed: %d", (int) GetLastError());
+ return -1;
+}
+
+
+static void ndis_events_media_connect(struct ndis_events_data *events)
+{
+ wpa_printf(MSG_DEBUG, "MSNdis_StatusMediaConnect");
+ ndis_events_send_event(events, EVENT_CONNECT, NULL, 0);
+}
+
+
+static void ndis_events_media_disconnect(struct ndis_events_data *events)
+{
+ wpa_printf(MSG_DEBUG, "MSNdis_StatusMediaDisconnect");
+ ndis_events_send_event(events, EVENT_DISCONNECT, NULL, 0);
+}
+
+
+static void ndis_events_media_specific(struct ndis_events_data *events,
+ IWbemClassObject *pObj)
+{
+ VARIANT vt;
+ HRESULT hr;
+ LONG lower, upper, k;
+ UCHAR ch;
+ char *data, *pos;
+ size_t data_len;
+
+ wpa_printf(MSG_DEBUG, "MSNdis_StatusMediaSpecificIndication");
+
+ /* This is the StatusBuffer from NdisMIndicateStatus() call */
+ hr = IWbemClassObject_Get(pObj, L"NdisStatusMediaSpecificIndication",
+ 0, &vt, NULL, NULL);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_DEBUG, "Could not get "
+ "NdisStatusMediaSpecificIndication from "
+ "the object?!");
+ return;
+ }
+
+ SafeArrayGetLBound(V_ARRAY(&vt), 1, &lower);
+ SafeArrayGetUBound(V_ARRAY(&vt), 1, &upper);
+ data_len = upper - lower + 1;
+ data = os_malloc(data_len);
+ if (data == NULL) {
+ wpa_printf(MSG_DEBUG, "Failed to allocate buffer for event "
+ "data");
+ VariantClear(&vt);
+ return;
+ }
+
+ pos = data;
+ for (k = lower; k <= upper; k++) {
+ SafeArrayGetElement(V_ARRAY(&vt), &k, &ch);
+ *pos++ = ch;
+ }
+ wpa_hexdump(MSG_DEBUG, "MediaSpecificEvent", (u8 *) data, data_len);
+
+ VariantClear(&vt);
+
+ ndis_events_send_event(events, EVENT_MEDIA_SPECIFIC, data, data_len);
+
+ os_free(data);
+}
+
+
+static void ndis_events_adapter_arrival(struct ndis_events_data *events)
+{
+ wpa_printf(MSG_DEBUG, "MSNdis_NotifyAdapterArrival");
+ ndis_events_send_event(events, EVENT_ADAPTER_ARRIVAL, NULL, 0);
+}
+
+
+static void ndis_events_adapter_removal(struct ndis_events_data *events)
+{
+ wpa_printf(MSG_DEBUG, "MSNdis_NotifyAdapterRemoval");
+ ndis_events_send_event(events, EVENT_ADAPTER_REMOVAL, NULL, 0);
+}
+
+
+static HRESULT STDMETHODCALLTYPE
+ndis_events_indicate(IWbemObjectSink *this, long lObjectCount,
+ IWbemClassObject __RPC_FAR *__RPC_FAR *ppObjArray)
+{
+ struct ndis_events_data *events = (struct ndis_events_data *) this;
+ long i;
+
+ if (events->terminating) {
+ wpa_printf(MSG_DEBUG, "ndis_events_indicate: Ignore "
+ "indication - terminating");
+ return WBEM_NO_ERROR;
+ }
+ /* wpa_printf(MSG_DEBUG, "Notification received - %d object(s)",
+ lObjectCount); */
+
+ for (i = 0; i < lObjectCount; i++) {
+ IWbemClassObject *pObj = ppObjArray[i];
+ HRESULT hr;
+ VARIANT vtClass, vt;
+
+ hr = IWbemClassObject_Get(pObj, L"__CLASS", 0, &vtClass, NULL,
+ NULL);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_DEBUG, "Failed to get __CLASS from "
+ "event.");
+ break;
+ }
+ /* wpa_printf(MSG_DEBUG, "CLASS: '%S'", vtClass.bstrVal); */
+
+ hr = IWbemClassObject_Get(pObj, L"InstanceName", 0, &vt, NULL,
+ NULL);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_DEBUG, "Failed to get InstanceName "
+ "from event.");
+ VariantClear(&vtClass);
+ break;
+ }
+
+ if (wcscmp(vtClass.bstrVal,
+ L"MSNdis_NotifyAdapterArrival") == 0) {
+ wpa_printf(MSG_DEBUG, "ndis_events_indicate: Try to "
+ "update adapter description since it may "
+ "have changed with new adapter instance");
+ ndis_events_get_adapter(events, events->ifname, NULL);
+ }
+
+ if (wcscmp(events->adapter_desc, vt.bstrVal) != 0) {
+ wpa_printf(MSG_DEBUG, "ndis_events_indicate: Ignore "
+ "indication for foreign adapter: "
+ "InstanceName: '%S' __CLASS: '%S'",
+ vt.bstrVal, vtClass.bstrVal);
+ VariantClear(&vtClass);
+ VariantClear(&vt);
+ continue;
+ }
+ VariantClear(&vt);
+
+ if (wcscmp(vtClass.bstrVal,
+ L"MSNdis_StatusMediaSpecificIndication") == 0) {
+ ndis_events_media_specific(events, pObj);
+ } else if (wcscmp(vtClass.bstrVal,
+ L"MSNdis_StatusMediaConnect") == 0) {
+ ndis_events_media_connect(events);
+ } else if (wcscmp(vtClass.bstrVal,
+ L"MSNdis_StatusMediaDisconnect") == 0) {
+ ndis_events_media_disconnect(events);
+ } else if (wcscmp(vtClass.bstrVal,
+ L"MSNdis_NotifyAdapterArrival") == 0) {
+ ndis_events_adapter_arrival(events);
+ } else if (wcscmp(vtClass.bstrVal,
+ L"MSNdis_NotifyAdapterRemoval") == 0) {
+ ndis_events_adapter_removal(events);
+ } else {
+ wpa_printf(MSG_DEBUG, "Unepected event - __CLASS: "
+ "'%S'", vtClass.bstrVal);
+ }
+
+ VariantClear(&vtClass);
+ }
+
+ return WBEM_NO_ERROR;
+}
+
+
+static HRESULT STDMETHODCALLTYPE
+ndis_events_set_status(IWbemObjectSink *this, long lFlags, HRESULT hResult,
+ BSTR strParam, IWbemClassObject __RPC_FAR *pObjParam)
+{
+ return WBEM_NO_ERROR;
+}
+
+
+static int notification_query(IWbemObjectSink *pDestSink,
+ IWbemServices *pSvc, const char *class_name)
+{
+ HRESULT hr;
+ WCHAR query[256];
+
+ _snwprintf(query, 256,
+ L"SELECT * FROM %S", class_name);
+ wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query);
+ hr = call_IWbemServices_ExecNotificationQueryAsync(
+ pSvc, L"WQL", query, 0, 0, pDestSink);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_DEBUG, "ExecNotificationQueryAsync for %s "
+ "failed with hresult of 0x%x",
+ class_name, (int) hr);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static int register_async_notification(IWbemObjectSink *pDestSink,
+ IWbemServices *pSvc)
+{
+ int i;
+ const char *class_list[] = {
+ "MSNdis_StatusMediaConnect",
+ "MSNdis_StatusMediaDisconnect",
+ "MSNdis_StatusMediaSpecificIndication",
+ "MSNdis_NotifyAdapterArrival",
+ "MSNdis_NotifyAdapterRemoval",
+ NULL
+ };
+
+ for (i = 0; class_list[i]; i++) {
+ if (notification_query(pDestSink, pSvc, class_list[i]) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
+
+void ndis_events_deinit(struct ndis_events_data *events)
+{
+ events->terminating = 1;
+ IWbemServices_CancelAsyncCall(events->pSvc, &events->sink);
+ IWbemObjectSink_Release(&events->sink);
+ /*
+ * Rest of deinitialization is done in ndis_events_destructor() once
+ * all reference count drops to zero.
+ */
+}
+
+
+static int ndis_events_use_desc(struct ndis_events_data *events,
+ const char *desc)
+{
+ char *tmp, *pos;
+ size_t len;
+
+ if (desc == NULL) {
+ if (events->adapter_desc == NULL)
+ return -1;
+ /* Continue using old description */
+ return 0;
+ }
+
+ tmp = os_strdup(desc);
+ if (tmp == NULL)
+ return -1;
+
+ pos = os_strstr(tmp, " (Microsoft's Packet Scheduler)");
+ if (pos)
+ *pos = '\0';
+
+ len = os_strlen(tmp);
+ events->adapter_desc = os_malloc((len + 1) * sizeof(WCHAR));
+ if (events->adapter_desc == NULL) {
+ os_free(tmp);
+ return -1;
+ }
+ _snwprintf(events->adapter_desc, len + 1, L"%S", tmp);
+ os_free(tmp);
+ return 0;
+}
+
+
+static int ndis_events_get_adapter(struct ndis_events_data *events,
+ const char *ifname, const char *desc)
+{
+ HRESULT hr;
+ IWbemServices *pSvc;
+#define MAX_QUERY_LEN 256
+ WCHAR query[MAX_QUERY_LEN];
+ IEnumWbemClassObject *pEnumerator;
+ IWbemClassObject *pObj;
+ ULONG uReturned;
+ VARIANT vt;
+ int len, pos;
+
+ /*
+ * Try to get adapter descriptor through WMI CIMv2 Win32_NetworkAdapter
+ * to have better probability of matching with InstanceName from
+ * MSNdis events. If this fails, use the provided description.
+ */
+
+ os_free(events->adapter_desc);
+ events->adapter_desc = NULL;
+
+ hr = call_IWbemLocator_ConnectServer(
+ events->pLoc, L"ROOT\\CIMV2", NULL, NULL, 0, 0, 0, 0, &pSvc);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_ERROR, "ndis_events: Could not connect to WMI "
+ "server (ROOT\\CIMV2) - error 0x%x", (int) hr);
+ return ndis_events_use_desc(events, desc);
+ }
+ wpa_printf(MSG_DEBUG, "ndis_events: Connected to ROOT\\CIMV2.");
+
+ _snwprintf(query, MAX_QUERY_LEN,
+ L"SELECT Index FROM Win32_NetworkAdapterConfiguration "
+ L"WHERE SettingID='%S'", ifname);
+ wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query);
+
+ hr = call_IWbemServices_ExecQuery(
+ pSvc, L"WQL", query,
+ WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
+ NULL, &pEnumerator);
+ if (!SUCCEEDED(hr)) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to query interface "
+ "GUID from Win32_NetworkAdapterConfiguration: "
+ "0x%x", (int) hr);
+ IWbemServices_Release(pSvc);
+ return ndis_events_use_desc(events, desc);
+ }
+
+ uReturned = 0;
+ hr = IEnumWbemClassObject_Next(pEnumerator, WBEM_INFINITE, 1,
+ &pObj, &uReturned);
+ if (!SUCCEEDED(hr) || uReturned == 0) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to find interface "
+ "GUID from Win32_NetworkAdapterConfiguration: "
+ "0x%x", (int) hr);
+ IEnumWbemClassObject_Release(pEnumerator);
+ IWbemServices_Release(pSvc);
+ return ndis_events_use_desc(events, desc);
+ }
+ IEnumWbemClassObject_Release(pEnumerator);
+
+ VariantInit(&vt);
+ hr = IWbemClassObject_Get(pObj, L"Index", 0, &vt, NULL, NULL);
+ if (!SUCCEEDED(hr)) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to get Index from "
+ "Win32_NetworkAdapterConfiguration: 0x%x",
+ (int) hr);
+ IWbemServices_Release(pSvc);
+ return ndis_events_use_desc(events, desc);
+ }
+
+ _snwprintf(query, MAX_QUERY_LEN,
+ L"SELECT Name,PNPDeviceID FROM Win32_NetworkAdapter WHERE "
+ L"Index=%d",
+ vt.uintVal);
+ wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query);
+ VariantClear(&vt);
+ IWbemClassObject_Release(pObj);
+
+ hr = call_IWbemServices_ExecQuery(
+ pSvc, L"WQL", query,
+ WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
+ NULL, &pEnumerator);
+ if (!SUCCEEDED(hr)) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to query interface "
+ "from Win32_NetworkAdapter: 0x%x", (int) hr);
+ IWbemServices_Release(pSvc);
+ return ndis_events_use_desc(events, desc);
+ }
+
+ uReturned = 0;
+ hr = IEnumWbemClassObject_Next(pEnumerator, WBEM_INFINITE, 1,
+ &pObj, &uReturned);
+ if (!SUCCEEDED(hr) || uReturned == 0) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to find interface "
+ "from Win32_NetworkAdapter: 0x%x", (int) hr);
+ IEnumWbemClassObject_Release(pEnumerator);
+ IWbemServices_Release(pSvc);
+ return ndis_events_use_desc(events, desc);
+ }
+ IEnumWbemClassObject_Release(pEnumerator);
+
+ hr = IWbemClassObject_Get(pObj, L"Name", 0, &vt, NULL, NULL);
+ if (!SUCCEEDED(hr)) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to get Name from "
+ "Win32_NetworkAdapter: 0x%x", (int) hr);
+ IWbemClassObject_Release(pObj);
+ IWbemServices_Release(pSvc);
+ return ndis_events_use_desc(events, desc);
+ }
+
+ wpa_printf(MSG_DEBUG, "ndis_events: Win32_NetworkAdapter::Name='%S'",
+ vt.bstrVal);
+ events->adapter_desc = _wcsdup(vt.bstrVal);
+ VariantClear(&vt);
+
+ /*
+ * Try to get even better candidate for matching with InstanceName
+ * from Win32_PnPEntity. This is needed at least for some USB cards
+ * that can change the InstanceName whenever being unplugged and
+ * plugged again.
+ */
+
+ hr = IWbemClassObject_Get(pObj, L"PNPDeviceID", 0, &vt, NULL, NULL);
+ if (!SUCCEEDED(hr)) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to get PNPDeviceID "
+ "from Win32_NetworkAdapter: 0x%x", (int) hr);
+ IWbemClassObject_Release(pObj);
+ IWbemServices_Release(pSvc);
+ if (events->adapter_desc == NULL)
+ return ndis_events_use_desc(events, desc);
+ return 0; /* use Win32_NetworkAdapter::Name */
+ }
+
+ wpa_printf(MSG_DEBUG, "ndis_events: Win32_NetworkAdapter::PNPDeviceID="
+ "'%S'", vt.bstrVal);
+
+ len = _snwprintf(query, MAX_QUERY_LEN,
+ L"SELECT Name FROM Win32_PnPEntity WHERE DeviceID='");
+ if (len < 0 || len >= MAX_QUERY_LEN - 1) {
+ VariantClear(&vt);
+ IWbemClassObject_Release(pObj);
+ IWbemServices_Release(pSvc);
+ if (events->adapter_desc == NULL)
+ return ndis_events_use_desc(events, desc);
+ return 0; /* use Win32_NetworkAdapter::Name */
+ }
+
+ /* Escape \ as \\ */
+ for (pos = 0; vt.bstrVal[pos] && len < MAX_QUERY_LEN - 2; pos++) {
+ if (vt.bstrVal[pos] == '\\') {
+ if (len >= MAX_QUERY_LEN - 3)
+ break;
+ query[len++] = '\\';
+ }
+ query[len++] = vt.bstrVal[pos];
+ }
+ query[len++] = L'\'';
+ query[len] = L'\0';
+ VariantClear(&vt);
+ IWbemClassObject_Release(pObj);
+ wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query);
+
+ hr = call_IWbemServices_ExecQuery(
+ pSvc, L"WQL", query,
+ WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
+ NULL, &pEnumerator);
+ if (!SUCCEEDED(hr)) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to query interface "
+ "Name from Win32_PnPEntity: 0x%x", (int) hr);
+ IWbemServices_Release(pSvc);
+ if (events->adapter_desc == NULL)
+ return ndis_events_use_desc(events, desc);
+ return 0; /* use Win32_NetworkAdapter::Name */
+ }
+
+ uReturned = 0;
+ hr = IEnumWbemClassObject_Next(pEnumerator, WBEM_INFINITE, 1,
+ &pObj, &uReturned);
+ if (!SUCCEEDED(hr) || uReturned == 0) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to find interface "
+ "from Win32_PnPEntity: 0x%x", (int) hr);
+ IEnumWbemClassObject_Release(pEnumerator);
+ IWbemServices_Release(pSvc);
+ if (events->adapter_desc == NULL)
+ return ndis_events_use_desc(events, desc);
+ return 0; /* use Win32_NetworkAdapter::Name */
+ }
+ IEnumWbemClassObject_Release(pEnumerator);
+
+ hr = IWbemClassObject_Get(pObj, L"Name", 0, &vt, NULL, NULL);
+ if (!SUCCEEDED(hr)) {
+ wpa_printf(MSG_DEBUG, "ndis_events: Failed to get Name from "
+ "Win32_PnPEntity: 0x%x", (int) hr);
+ IWbemClassObject_Release(pObj);
+ IWbemServices_Release(pSvc);
+ if (events->adapter_desc == NULL)
+ return ndis_events_use_desc(events, desc);
+ return 0; /* use Win32_NetworkAdapter::Name */
+ }
+
+ wpa_printf(MSG_DEBUG, "ndis_events: Win32_PnPEntity::Name='%S'",
+ vt.bstrVal);
+ os_free(events->adapter_desc);
+ events->adapter_desc = _wcsdup(vt.bstrVal);
+ VariantClear(&vt);
+
+ IWbemClassObject_Release(pObj);
+
+ IWbemServices_Release(pSvc);
+
+ if (events->adapter_desc == NULL)
+ return ndis_events_use_desc(events, desc);
+
+ return 0;
+}
+
+
+struct ndis_events_data *
+ndis_events_init(HANDLE *read_pipe, HANDLE *event_avail,
+ const char *ifname, const char *desc)
+{
+ HRESULT hr;
+ IWbemObjectSink *pSink;
+ struct ndis_events_data *events;
+
+ events = os_zalloc(sizeof(*events));
+ if (events == NULL) {
+ wpa_printf(MSG_ERROR, "Could not allocate sink for events.");
+ return NULL;
+ }
+ events->ifname = os_strdup(ifname);
+ if (events->ifname == NULL) {
+ os_free(events);
+ return NULL;
+ }
+
+ if (wmi_refcnt++ == 0) {
+ hr = CoInitializeEx(0, COINIT_MULTITHREADED);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_ERROR, "CoInitializeEx() failed - "
+ "returned 0x%x", (int) hr);
+ os_free(events);
+ return NULL;
+ }
+ }
+
+ if (wmi_first) {
+ /* CoInitializeSecurity() must be called once and only once
+ * per process, so let's use wmi_first flag to protect against
+ * multiple calls. */
+ wmi_first = 0;
+
+ hr = CoInitializeSecurity(NULL, -1, NULL, NULL,
+ RPC_C_AUTHN_LEVEL_PKT_PRIVACY,
+ RPC_C_IMP_LEVEL_IMPERSONATE,
+ NULL, EOAC_SECURE_REFS, NULL);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_ERROR, "CoInitializeSecurity() failed "
+ "- returned 0x%x", (int) hr);
+ os_free(events);
+ return NULL;
+ }
+ }
+
+ hr = CoCreateInstance(&CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER,
+ &IID_IWbemLocator,
+ (LPVOID *) (void *) &events->pLoc);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_ERROR, "CoCreateInstance() failed - returned "
+ "0x%x", (int) hr);
+ CoUninitialize();
+ os_free(events);
+ return NULL;
+ }
+
+ if (ndis_events_get_adapter(events, ifname, desc) < 0) {
+ CoUninitialize();
+ os_free(events);
+ return NULL;
+ }
+ wpa_printf(MSG_DEBUG, "ndis_events: use adapter descriptor '%S'",
+ events->adapter_desc);
+
+ hr = call_IWbemLocator_ConnectServer(
+ events->pLoc, L"ROOT\\WMI", NULL, NULL,
+ 0, 0, 0, 0, &events->pSvc);
+ if (FAILED(hr)) {
+ wpa_printf(MSG_ERROR, "Could not connect to server - error "
+ "0x%x", (int) hr);
+ CoUninitialize();
+ os_free(events->adapter_desc);
+ os_free(events);
+ return NULL;
+ }
+ wpa_printf(MSG_DEBUG, "Connected to ROOT\\WMI.");
+
+ ndis_events_constructor(events);
+ pSink = &events->sink;
+ pSink->lpVtbl = &events->sink_vtbl;
+ events->sink_vtbl.QueryInterface = ndis_events_query_interface;
+ events->sink_vtbl.AddRef = ndis_events_add_ref;
+ events->sink_vtbl.Release = ndis_events_release;
+ events->sink_vtbl.Indicate = ndis_events_indicate;
+ events->sink_vtbl.SetStatus = ndis_events_set_status;
+
+ if (register_async_notification(pSink, events->pSvc) < 0) {
+ wpa_printf(MSG_DEBUG, "Failed to register async "
+ "notifications");
+ ndis_events_destructor(events);
+ os_free(events->adapter_desc);
+ os_free(events);
+ return NULL;
+ }
+
+ *read_pipe = events->read_pipe;
+ *event_avail = events->event_avail;
+
+ return events;
+}