Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ndis_events - Receive NdisMIndicateStatus() events using WMI |
| 3 | * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * Alternatively, this software may be distributed under the terms of BSD |
| 10 | * license. |
| 11 | * |
| 12 | * See README and COPYING for more details. |
| 13 | */ |
| 14 | |
| 15 | #define _WIN32_WINNT 0x0400 |
| 16 | |
| 17 | #include "includes.h" |
| 18 | |
| 19 | #ifndef COBJMACROS |
| 20 | #define COBJMACROS |
| 21 | #endif /* COBJMACROS */ |
| 22 | #include <wbemidl.h> |
| 23 | |
| 24 | #include "common.h" |
| 25 | |
| 26 | |
| 27 | static int wmi_refcnt = 0; |
| 28 | static int wmi_first = 1; |
| 29 | |
| 30 | struct ndis_events_data { |
| 31 | IWbemObjectSink sink; |
| 32 | IWbemObjectSinkVtbl sink_vtbl; |
| 33 | |
| 34 | IWbemServices *pSvc; |
| 35 | IWbemLocator *pLoc; |
| 36 | |
| 37 | HANDLE read_pipe, write_pipe, event_avail; |
| 38 | UINT ref; |
| 39 | int terminating; |
| 40 | char *ifname; /* {GUID..} */ |
| 41 | WCHAR *adapter_desc; |
| 42 | }; |
| 43 | |
| 44 | #define BstrAlloc(x) (x) ? SysAllocString(x) : NULL |
| 45 | #define BstrFree(x) if (x) SysFreeString(x) |
| 46 | |
| 47 | /* WBEM / WMI wrapper functions, to perform in-place conversion of WCHARs to |
| 48 | * BSTRs */ |
| 49 | HRESULT STDMETHODCALLTYPE call_IWbemServices_ExecQuery( |
| 50 | IWbemServices *pSvc, LPCWSTR strQueryLanguage, LPCWSTR strQuery, |
| 51 | long lFlags, IWbemContext *pCtx, IEnumWbemClassObject **ppEnum) |
| 52 | { |
| 53 | BSTR bsQueryLanguage, bsQuery; |
| 54 | HRESULT hr; |
| 55 | |
| 56 | bsQueryLanguage = BstrAlloc(strQueryLanguage); |
| 57 | bsQuery = BstrAlloc(strQuery); |
| 58 | |
| 59 | hr = IWbemServices_ExecQuery(pSvc, bsQueryLanguage, bsQuery, lFlags, |
| 60 | pCtx, ppEnum); |
| 61 | |
| 62 | BstrFree(bsQueryLanguage); |
| 63 | BstrFree(bsQuery); |
| 64 | |
| 65 | return hr; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | HRESULT STDMETHODCALLTYPE call_IWbemServices_ExecNotificationQueryAsync( |
| 70 | IWbemServices *pSvc, LPCWSTR strQueryLanguage, LPCWSTR strQuery, |
| 71 | long lFlags, IWbemContext *pCtx, IWbemObjectSink *pResponseHandler) |
| 72 | { |
| 73 | BSTR bsQueryLanguage, bsQuery; |
| 74 | HRESULT hr; |
| 75 | |
| 76 | bsQueryLanguage = BstrAlloc(strQueryLanguage); |
| 77 | bsQuery = BstrAlloc(strQuery); |
| 78 | |
| 79 | hr = IWbemServices_ExecNotificationQueryAsync(pSvc, bsQueryLanguage, |
| 80 | bsQuery, lFlags, pCtx, |
| 81 | pResponseHandler); |
| 82 | |
| 83 | BstrFree(bsQueryLanguage); |
| 84 | BstrFree(bsQuery); |
| 85 | |
| 86 | return hr; |
| 87 | } |
| 88 | |
| 89 | |
| 90 | HRESULT STDMETHODCALLTYPE call_IWbemLocator_ConnectServer( |
| 91 | IWbemLocator *pLoc, LPCWSTR strNetworkResource, LPCWSTR strUser, |
| 92 | LPCWSTR strPassword, LPCWSTR strLocale, long lSecurityFlags, |
| 93 | LPCWSTR strAuthority, IWbemContext *pCtx, IWbemServices **ppNamespace) |
| 94 | { |
| 95 | BSTR bsNetworkResource, bsUser, bsPassword, bsLocale, bsAuthority; |
| 96 | HRESULT hr; |
| 97 | |
| 98 | bsNetworkResource = BstrAlloc(strNetworkResource); |
| 99 | bsUser = BstrAlloc(strUser); |
| 100 | bsPassword = BstrAlloc(strPassword); |
| 101 | bsLocale = BstrAlloc(strLocale); |
| 102 | bsAuthority = BstrAlloc(strAuthority); |
| 103 | |
| 104 | hr = IWbemLocator_ConnectServer(pLoc, bsNetworkResource, bsUser, |
| 105 | bsPassword, bsLocale, lSecurityFlags, |
| 106 | bsAuthority, pCtx, ppNamespace); |
| 107 | |
| 108 | BstrFree(bsNetworkResource); |
| 109 | BstrFree(bsUser); |
| 110 | BstrFree(bsPassword); |
| 111 | BstrFree(bsLocale); |
| 112 | BstrFree(bsAuthority); |
| 113 | |
| 114 | return hr; |
| 115 | } |
| 116 | |
| 117 | |
| 118 | enum event_types { EVENT_CONNECT, EVENT_DISCONNECT, EVENT_MEDIA_SPECIFIC, |
| 119 | EVENT_ADAPTER_ARRIVAL, EVENT_ADAPTER_REMOVAL }; |
| 120 | |
| 121 | static int ndis_events_get_adapter(struct ndis_events_data *events, |
| 122 | const char *ifname, const char *desc); |
| 123 | |
| 124 | |
| 125 | static int ndis_events_constructor(struct ndis_events_data *events) |
| 126 | { |
| 127 | events->ref = 1; |
| 128 | |
| 129 | if (!CreatePipe(&events->read_pipe, &events->write_pipe, NULL, 512)) { |
| 130 | wpa_printf(MSG_ERROR, "CreatePipe() failed: %d", |
| 131 | (int) GetLastError()); |
| 132 | return -1; |
| 133 | } |
| 134 | events->event_avail = CreateEvent(NULL, TRUE, FALSE, NULL); |
| 135 | if (events->event_avail == NULL) { |
| 136 | wpa_printf(MSG_ERROR, "CreateEvent() failed: %d", |
| 137 | (int) GetLastError()); |
| 138 | CloseHandle(events->read_pipe); |
| 139 | CloseHandle(events->write_pipe); |
| 140 | return -1; |
| 141 | } |
| 142 | |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | |
| 147 | static void ndis_events_destructor(struct ndis_events_data *events) |
| 148 | { |
| 149 | CloseHandle(events->read_pipe); |
| 150 | CloseHandle(events->write_pipe); |
| 151 | CloseHandle(events->event_avail); |
| 152 | IWbemServices_Release(events->pSvc); |
| 153 | IWbemLocator_Release(events->pLoc); |
| 154 | if (--wmi_refcnt == 0) |
| 155 | CoUninitialize(); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | static HRESULT STDMETHODCALLTYPE |
| 160 | ndis_events_query_interface(IWbemObjectSink *this, REFIID riid, void **obj) |
| 161 | { |
| 162 | *obj = NULL; |
| 163 | |
| 164 | if (IsEqualIID(riid, &IID_IUnknown) || |
| 165 | IsEqualIID(riid, &IID_IWbemObjectSink)) { |
| 166 | *obj = this; |
| 167 | IWbemObjectSink_AddRef(this); |
| 168 | return NOERROR; |
| 169 | } |
| 170 | |
| 171 | return E_NOINTERFACE; |
| 172 | } |
| 173 | |
| 174 | |
| 175 | static ULONG STDMETHODCALLTYPE ndis_events_add_ref(IWbemObjectSink *this) |
| 176 | { |
| 177 | struct ndis_events_data *events = (struct ndis_events_data *) this; |
| 178 | return ++events->ref; |
| 179 | } |
| 180 | |
| 181 | |
| 182 | static ULONG STDMETHODCALLTYPE ndis_events_release(IWbemObjectSink *this) |
| 183 | { |
| 184 | struct ndis_events_data *events = (struct ndis_events_data *) this; |
| 185 | |
| 186 | if (--events->ref != 0) |
| 187 | return events->ref; |
| 188 | |
| 189 | ndis_events_destructor(events); |
| 190 | wpa_printf(MSG_DEBUG, "ndis_events: terminated"); |
| 191 | os_free(events->adapter_desc); |
| 192 | os_free(events->ifname); |
| 193 | os_free(events); |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | static int ndis_events_send_event(struct ndis_events_data *events, |
| 199 | enum event_types type, |
| 200 | char *data, size_t data_len) |
| 201 | { |
| 202 | char buf[512], *pos, *end; |
| 203 | int _type; |
| 204 | DWORD written; |
| 205 | |
| 206 | end = buf + sizeof(buf); |
| 207 | _type = (int) type; |
| 208 | os_memcpy(buf, &_type, sizeof(_type)); |
| 209 | pos = buf + sizeof(_type); |
| 210 | |
| 211 | if (data) { |
| 212 | if (2 + data_len > (size_t) (end - pos)) { |
| 213 | wpa_printf(MSG_DEBUG, "Not enough room for send_event " |
| 214 | "data (%d)", data_len); |
| 215 | return -1; |
| 216 | } |
| 217 | *pos++ = data_len >> 8; |
| 218 | *pos++ = data_len & 0xff; |
| 219 | os_memcpy(pos, data, data_len); |
| 220 | pos += data_len; |
| 221 | } |
| 222 | |
| 223 | if (WriteFile(events->write_pipe, buf, pos - buf, &written, NULL)) { |
| 224 | SetEvent(events->event_avail); |
| 225 | return 0; |
| 226 | } |
| 227 | wpa_printf(MSG_INFO, "WriteFile() failed: %d", (int) GetLastError()); |
| 228 | return -1; |
| 229 | } |
| 230 | |
| 231 | |
| 232 | static void ndis_events_media_connect(struct ndis_events_data *events) |
| 233 | { |
| 234 | wpa_printf(MSG_DEBUG, "MSNdis_StatusMediaConnect"); |
| 235 | ndis_events_send_event(events, EVENT_CONNECT, NULL, 0); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | static void ndis_events_media_disconnect(struct ndis_events_data *events) |
| 240 | { |
| 241 | wpa_printf(MSG_DEBUG, "MSNdis_StatusMediaDisconnect"); |
| 242 | ndis_events_send_event(events, EVENT_DISCONNECT, NULL, 0); |
| 243 | } |
| 244 | |
| 245 | |
| 246 | static void ndis_events_media_specific(struct ndis_events_data *events, |
| 247 | IWbemClassObject *pObj) |
| 248 | { |
| 249 | VARIANT vt; |
| 250 | HRESULT hr; |
| 251 | LONG lower, upper, k; |
| 252 | UCHAR ch; |
| 253 | char *data, *pos; |
| 254 | size_t data_len; |
| 255 | |
| 256 | wpa_printf(MSG_DEBUG, "MSNdis_StatusMediaSpecificIndication"); |
| 257 | |
| 258 | /* This is the StatusBuffer from NdisMIndicateStatus() call */ |
| 259 | hr = IWbemClassObject_Get(pObj, L"NdisStatusMediaSpecificIndication", |
| 260 | 0, &vt, NULL, NULL); |
| 261 | if (FAILED(hr)) { |
| 262 | wpa_printf(MSG_DEBUG, "Could not get " |
| 263 | "NdisStatusMediaSpecificIndication from " |
| 264 | "the object?!"); |
| 265 | return; |
| 266 | } |
| 267 | |
| 268 | SafeArrayGetLBound(V_ARRAY(&vt), 1, &lower); |
| 269 | SafeArrayGetUBound(V_ARRAY(&vt), 1, &upper); |
| 270 | data_len = upper - lower + 1; |
| 271 | data = os_malloc(data_len); |
| 272 | if (data == NULL) { |
| 273 | wpa_printf(MSG_DEBUG, "Failed to allocate buffer for event " |
| 274 | "data"); |
| 275 | VariantClear(&vt); |
| 276 | return; |
| 277 | } |
| 278 | |
| 279 | pos = data; |
| 280 | for (k = lower; k <= upper; k++) { |
| 281 | SafeArrayGetElement(V_ARRAY(&vt), &k, &ch); |
| 282 | *pos++ = ch; |
| 283 | } |
| 284 | wpa_hexdump(MSG_DEBUG, "MediaSpecificEvent", (u8 *) data, data_len); |
| 285 | |
| 286 | VariantClear(&vt); |
| 287 | |
| 288 | ndis_events_send_event(events, EVENT_MEDIA_SPECIFIC, data, data_len); |
| 289 | |
| 290 | os_free(data); |
| 291 | } |
| 292 | |
| 293 | |
| 294 | static void ndis_events_adapter_arrival(struct ndis_events_data *events) |
| 295 | { |
| 296 | wpa_printf(MSG_DEBUG, "MSNdis_NotifyAdapterArrival"); |
| 297 | ndis_events_send_event(events, EVENT_ADAPTER_ARRIVAL, NULL, 0); |
| 298 | } |
| 299 | |
| 300 | |
| 301 | static void ndis_events_adapter_removal(struct ndis_events_data *events) |
| 302 | { |
| 303 | wpa_printf(MSG_DEBUG, "MSNdis_NotifyAdapterRemoval"); |
| 304 | ndis_events_send_event(events, EVENT_ADAPTER_REMOVAL, NULL, 0); |
| 305 | } |
| 306 | |
| 307 | |
| 308 | static HRESULT STDMETHODCALLTYPE |
| 309 | ndis_events_indicate(IWbemObjectSink *this, long lObjectCount, |
| 310 | IWbemClassObject __RPC_FAR *__RPC_FAR *ppObjArray) |
| 311 | { |
| 312 | struct ndis_events_data *events = (struct ndis_events_data *) this; |
| 313 | long i; |
| 314 | |
| 315 | if (events->terminating) { |
| 316 | wpa_printf(MSG_DEBUG, "ndis_events_indicate: Ignore " |
| 317 | "indication - terminating"); |
| 318 | return WBEM_NO_ERROR; |
| 319 | } |
| 320 | /* wpa_printf(MSG_DEBUG, "Notification received - %d object(s)", |
| 321 | lObjectCount); */ |
| 322 | |
| 323 | for (i = 0; i < lObjectCount; i++) { |
| 324 | IWbemClassObject *pObj = ppObjArray[i]; |
| 325 | HRESULT hr; |
| 326 | VARIANT vtClass, vt; |
| 327 | |
| 328 | hr = IWbemClassObject_Get(pObj, L"__CLASS", 0, &vtClass, NULL, |
| 329 | NULL); |
| 330 | if (FAILED(hr)) { |
| 331 | wpa_printf(MSG_DEBUG, "Failed to get __CLASS from " |
| 332 | "event."); |
| 333 | break; |
| 334 | } |
| 335 | /* wpa_printf(MSG_DEBUG, "CLASS: '%S'", vtClass.bstrVal); */ |
| 336 | |
| 337 | hr = IWbemClassObject_Get(pObj, L"InstanceName", 0, &vt, NULL, |
| 338 | NULL); |
| 339 | if (FAILED(hr)) { |
| 340 | wpa_printf(MSG_DEBUG, "Failed to get InstanceName " |
| 341 | "from event."); |
| 342 | VariantClear(&vtClass); |
| 343 | break; |
| 344 | } |
| 345 | |
| 346 | if (wcscmp(vtClass.bstrVal, |
| 347 | L"MSNdis_NotifyAdapterArrival") == 0) { |
| 348 | wpa_printf(MSG_DEBUG, "ndis_events_indicate: Try to " |
| 349 | "update adapter description since it may " |
| 350 | "have changed with new adapter instance"); |
| 351 | ndis_events_get_adapter(events, events->ifname, NULL); |
| 352 | } |
| 353 | |
| 354 | if (wcscmp(events->adapter_desc, vt.bstrVal) != 0) { |
| 355 | wpa_printf(MSG_DEBUG, "ndis_events_indicate: Ignore " |
| 356 | "indication for foreign adapter: " |
| 357 | "InstanceName: '%S' __CLASS: '%S'", |
| 358 | vt.bstrVal, vtClass.bstrVal); |
| 359 | VariantClear(&vtClass); |
| 360 | VariantClear(&vt); |
| 361 | continue; |
| 362 | } |
| 363 | VariantClear(&vt); |
| 364 | |
| 365 | if (wcscmp(vtClass.bstrVal, |
| 366 | L"MSNdis_StatusMediaSpecificIndication") == 0) { |
| 367 | ndis_events_media_specific(events, pObj); |
| 368 | } else if (wcscmp(vtClass.bstrVal, |
| 369 | L"MSNdis_StatusMediaConnect") == 0) { |
| 370 | ndis_events_media_connect(events); |
| 371 | } else if (wcscmp(vtClass.bstrVal, |
| 372 | L"MSNdis_StatusMediaDisconnect") == 0) { |
| 373 | ndis_events_media_disconnect(events); |
| 374 | } else if (wcscmp(vtClass.bstrVal, |
| 375 | L"MSNdis_NotifyAdapterArrival") == 0) { |
| 376 | ndis_events_adapter_arrival(events); |
| 377 | } else if (wcscmp(vtClass.bstrVal, |
| 378 | L"MSNdis_NotifyAdapterRemoval") == 0) { |
| 379 | ndis_events_adapter_removal(events); |
| 380 | } else { |
| 381 | wpa_printf(MSG_DEBUG, "Unepected event - __CLASS: " |
| 382 | "'%S'", vtClass.bstrVal); |
| 383 | } |
| 384 | |
| 385 | VariantClear(&vtClass); |
| 386 | } |
| 387 | |
| 388 | return WBEM_NO_ERROR; |
| 389 | } |
| 390 | |
| 391 | |
| 392 | static HRESULT STDMETHODCALLTYPE |
| 393 | ndis_events_set_status(IWbemObjectSink *this, long lFlags, HRESULT hResult, |
| 394 | BSTR strParam, IWbemClassObject __RPC_FAR *pObjParam) |
| 395 | { |
| 396 | return WBEM_NO_ERROR; |
| 397 | } |
| 398 | |
| 399 | |
| 400 | static int notification_query(IWbemObjectSink *pDestSink, |
| 401 | IWbemServices *pSvc, const char *class_name) |
| 402 | { |
| 403 | HRESULT hr; |
| 404 | WCHAR query[256]; |
| 405 | |
| 406 | _snwprintf(query, 256, |
| 407 | L"SELECT * FROM %S", class_name); |
| 408 | wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query); |
| 409 | hr = call_IWbemServices_ExecNotificationQueryAsync( |
| 410 | pSvc, L"WQL", query, 0, 0, pDestSink); |
| 411 | if (FAILED(hr)) { |
| 412 | wpa_printf(MSG_DEBUG, "ExecNotificationQueryAsync for %s " |
| 413 | "failed with hresult of 0x%x", |
| 414 | class_name, (int) hr); |
| 415 | return -1; |
| 416 | } |
| 417 | |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | |
| 422 | static int register_async_notification(IWbemObjectSink *pDestSink, |
| 423 | IWbemServices *pSvc) |
| 424 | { |
| 425 | int i; |
| 426 | const char *class_list[] = { |
| 427 | "MSNdis_StatusMediaConnect", |
| 428 | "MSNdis_StatusMediaDisconnect", |
| 429 | "MSNdis_StatusMediaSpecificIndication", |
| 430 | "MSNdis_NotifyAdapterArrival", |
| 431 | "MSNdis_NotifyAdapterRemoval", |
| 432 | NULL |
| 433 | }; |
| 434 | |
| 435 | for (i = 0; class_list[i]; i++) { |
| 436 | if (notification_query(pDestSink, pSvc, class_list[i]) < 0) |
| 437 | return -1; |
| 438 | } |
| 439 | |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | |
| 444 | void ndis_events_deinit(struct ndis_events_data *events) |
| 445 | { |
| 446 | events->terminating = 1; |
| 447 | IWbemServices_CancelAsyncCall(events->pSvc, &events->sink); |
| 448 | IWbemObjectSink_Release(&events->sink); |
| 449 | /* |
| 450 | * Rest of deinitialization is done in ndis_events_destructor() once |
| 451 | * all reference count drops to zero. |
| 452 | */ |
| 453 | } |
| 454 | |
| 455 | |
| 456 | static int ndis_events_use_desc(struct ndis_events_data *events, |
| 457 | const char *desc) |
| 458 | { |
| 459 | char *tmp, *pos; |
| 460 | size_t len; |
| 461 | |
| 462 | if (desc == NULL) { |
| 463 | if (events->adapter_desc == NULL) |
| 464 | return -1; |
| 465 | /* Continue using old description */ |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | tmp = os_strdup(desc); |
| 470 | if (tmp == NULL) |
| 471 | return -1; |
| 472 | |
| 473 | pos = os_strstr(tmp, " (Microsoft's Packet Scheduler)"); |
| 474 | if (pos) |
| 475 | *pos = '\0'; |
| 476 | |
| 477 | len = os_strlen(tmp); |
| 478 | events->adapter_desc = os_malloc((len + 1) * sizeof(WCHAR)); |
| 479 | if (events->adapter_desc == NULL) { |
| 480 | os_free(tmp); |
| 481 | return -1; |
| 482 | } |
| 483 | _snwprintf(events->adapter_desc, len + 1, L"%S", tmp); |
| 484 | os_free(tmp); |
| 485 | return 0; |
| 486 | } |
| 487 | |
| 488 | |
| 489 | static int ndis_events_get_adapter(struct ndis_events_data *events, |
| 490 | const char *ifname, const char *desc) |
| 491 | { |
| 492 | HRESULT hr; |
| 493 | IWbemServices *pSvc; |
| 494 | #define MAX_QUERY_LEN 256 |
| 495 | WCHAR query[MAX_QUERY_LEN]; |
| 496 | IEnumWbemClassObject *pEnumerator; |
| 497 | IWbemClassObject *pObj; |
| 498 | ULONG uReturned; |
| 499 | VARIANT vt; |
| 500 | int len, pos; |
| 501 | |
| 502 | /* |
| 503 | * Try to get adapter descriptor through WMI CIMv2 Win32_NetworkAdapter |
| 504 | * to have better probability of matching with InstanceName from |
| 505 | * MSNdis events. If this fails, use the provided description. |
| 506 | */ |
| 507 | |
| 508 | os_free(events->adapter_desc); |
| 509 | events->adapter_desc = NULL; |
| 510 | |
| 511 | hr = call_IWbemLocator_ConnectServer( |
| 512 | events->pLoc, L"ROOT\\CIMV2", NULL, NULL, 0, 0, 0, 0, &pSvc); |
| 513 | if (FAILED(hr)) { |
| 514 | wpa_printf(MSG_ERROR, "ndis_events: Could not connect to WMI " |
| 515 | "server (ROOT\\CIMV2) - error 0x%x", (int) hr); |
| 516 | return ndis_events_use_desc(events, desc); |
| 517 | } |
| 518 | wpa_printf(MSG_DEBUG, "ndis_events: Connected to ROOT\\CIMV2."); |
| 519 | |
| 520 | _snwprintf(query, MAX_QUERY_LEN, |
| 521 | L"SELECT Index FROM Win32_NetworkAdapterConfiguration " |
| 522 | L"WHERE SettingID='%S'", ifname); |
| 523 | wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query); |
| 524 | |
| 525 | hr = call_IWbemServices_ExecQuery( |
| 526 | pSvc, L"WQL", query, |
| 527 | WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, |
| 528 | NULL, &pEnumerator); |
| 529 | if (!SUCCEEDED(hr)) { |
| 530 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to query interface " |
| 531 | "GUID from Win32_NetworkAdapterConfiguration: " |
| 532 | "0x%x", (int) hr); |
| 533 | IWbemServices_Release(pSvc); |
| 534 | return ndis_events_use_desc(events, desc); |
| 535 | } |
| 536 | |
| 537 | uReturned = 0; |
| 538 | hr = IEnumWbemClassObject_Next(pEnumerator, WBEM_INFINITE, 1, |
| 539 | &pObj, &uReturned); |
| 540 | if (!SUCCEEDED(hr) || uReturned == 0) { |
| 541 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to find interface " |
| 542 | "GUID from Win32_NetworkAdapterConfiguration: " |
| 543 | "0x%x", (int) hr); |
| 544 | IEnumWbemClassObject_Release(pEnumerator); |
| 545 | IWbemServices_Release(pSvc); |
| 546 | return ndis_events_use_desc(events, desc); |
| 547 | } |
| 548 | IEnumWbemClassObject_Release(pEnumerator); |
| 549 | |
| 550 | VariantInit(&vt); |
| 551 | hr = IWbemClassObject_Get(pObj, L"Index", 0, &vt, NULL, NULL); |
| 552 | if (!SUCCEEDED(hr)) { |
| 553 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to get Index from " |
| 554 | "Win32_NetworkAdapterConfiguration: 0x%x", |
| 555 | (int) hr); |
| 556 | IWbemServices_Release(pSvc); |
| 557 | return ndis_events_use_desc(events, desc); |
| 558 | } |
| 559 | |
| 560 | _snwprintf(query, MAX_QUERY_LEN, |
| 561 | L"SELECT Name,PNPDeviceID FROM Win32_NetworkAdapter WHERE " |
| 562 | L"Index=%d", |
| 563 | vt.uintVal); |
| 564 | wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query); |
| 565 | VariantClear(&vt); |
| 566 | IWbemClassObject_Release(pObj); |
| 567 | |
| 568 | hr = call_IWbemServices_ExecQuery( |
| 569 | pSvc, L"WQL", query, |
| 570 | WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, |
| 571 | NULL, &pEnumerator); |
| 572 | if (!SUCCEEDED(hr)) { |
| 573 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to query interface " |
| 574 | "from Win32_NetworkAdapter: 0x%x", (int) hr); |
| 575 | IWbemServices_Release(pSvc); |
| 576 | return ndis_events_use_desc(events, desc); |
| 577 | } |
| 578 | |
| 579 | uReturned = 0; |
| 580 | hr = IEnumWbemClassObject_Next(pEnumerator, WBEM_INFINITE, 1, |
| 581 | &pObj, &uReturned); |
| 582 | if (!SUCCEEDED(hr) || uReturned == 0) { |
| 583 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to find interface " |
| 584 | "from Win32_NetworkAdapter: 0x%x", (int) hr); |
| 585 | IEnumWbemClassObject_Release(pEnumerator); |
| 586 | IWbemServices_Release(pSvc); |
| 587 | return ndis_events_use_desc(events, desc); |
| 588 | } |
| 589 | IEnumWbemClassObject_Release(pEnumerator); |
| 590 | |
| 591 | hr = IWbemClassObject_Get(pObj, L"Name", 0, &vt, NULL, NULL); |
| 592 | if (!SUCCEEDED(hr)) { |
| 593 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to get Name from " |
| 594 | "Win32_NetworkAdapter: 0x%x", (int) hr); |
| 595 | IWbemClassObject_Release(pObj); |
| 596 | IWbemServices_Release(pSvc); |
| 597 | return ndis_events_use_desc(events, desc); |
| 598 | } |
| 599 | |
| 600 | wpa_printf(MSG_DEBUG, "ndis_events: Win32_NetworkAdapter::Name='%S'", |
| 601 | vt.bstrVal); |
| 602 | events->adapter_desc = _wcsdup(vt.bstrVal); |
| 603 | VariantClear(&vt); |
| 604 | |
| 605 | /* |
| 606 | * Try to get even better candidate for matching with InstanceName |
| 607 | * from Win32_PnPEntity. This is needed at least for some USB cards |
| 608 | * that can change the InstanceName whenever being unplugged and |
| 609 | * plugged again. |
| 610 | */ |
| 611 | |
| 612 | hr = IWbemClassObject_Get(pObj, L"PNPDeviceID", 0, &vt, NULL, NULL); |
| 613 | if (!SUCCEEDED(hr)) { |
| 614 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to get PNPDeviceID " |
| 615 | "from Win32_NetworkAdapter: 0x%x", (int) hr); |
| 616 | IWbemClassObject_Release(pObj); |
| 617 | IWbemServices_Release(pSvc); |
| 618 | if (events->adapter_desc == NULL) |
| 619 | return ndis_events_use_desc(events, desc); |
| 620 | return 0; /* use Win32_NetworkAdapter::Name */ |
| 621 | } |
| 622 | |
| 623 | wpa_printf(MSG_DEBUG, "ndis_events: Win32_NetworkAdapter::PNPDeviceID=" |
| 624 | "'%S'", vt.bstrVal); |
| 625 | |
| 626 | len = _snwprintf(query, MAX_QUERY_LEN, |
| 627 | L"SELECT Name FROM Win32_PnPEntity WHERE DeviceID='"); |
| 628 | if (len < 0 || len >= MAX_QUERY_LEN - 1) { |
| 629 | VariantClear(&vt); |
| 630 | IWbemClassObject_Release(pObj); |
| 631 | IWbemServices_Release(pSvc); |
| 632 | if (events->adapter_desc == NULL) |
| 633 | return ndis_events_use_desc(events, desc); |
| 634 | return 0; /* use Win32_NetworkAdapter::Name */ |
| 635 | } |
| 636 | |
| 637 | /* Escape \ as \\ */ |
| 638 | for (pos = 0; vt.bstrVal[pos] && len < MAX_QUERY_LEN - 2; pos++) { |
| 639 | if (vt.bstrVal[pos] == '\\') { |
| 640 | if (len >= MAX_QUERY_LEN - 3) |
| 641 | break; |
| 642 | query[len++] = '\\'; |
| 643 | } |
| 644 | query[len++] = vt.bstrVal[pos]; |
| 645 | } |
| 646 | query[len++] = L'\''; |
| 647 | query[len] = L'\0'; |
| 648 | VariantClear(&vt); |
| 649 | IWbemClassObject_Release(pObj); |
| 650 | wpa_printf(MSG_DEBUG, "ndis_events: WMI: %S", query); |
| 651 | |
| 652 | hr = call_IWbemServices_ExecQuery( |
| 653 | pSvc, L"WQL", query, |
| 654 | WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, |
| 655 | NULL, &pEnumerator); |
| 656 | if (!SUCCEEDED(hr)) { |
| 657 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to query interface " |
| 658 | "Name from Win32_PnPEntity: 0x%x", (int) hr); |
| 659 | IWbemServices_Release(pSvc); |
| 660 | if (events->adapter_desc == NULL) |
| 661 | return ndis_events_use_desc(events, desc); |
| 662 | return 0; /* use Win32_NetworkAdapter::Name */ |
| 663 | } |
| 664 | |
| 665 | uReturned = 0; |
| 666 | hr = IEnumWbemClassObject_Next(pEnumerator, WBEM_INFINITE, 1, |
| 667 | &pObj, &uReturned); |
| 668 | if (!SUCCEEDED(hr) || uReturned == 0) { |
| 669 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to find interface " |
| 670 | "from Win32_PnPEntity: 0x%x", (int) hr); |
| 671 | IEnumWbemClassObject_Release(pEnumerator); |
| 672 | IWbemServices_Release(pSvc); |
| 673 | if (events->adapter_desc == NULL) |
| 674 | return ndis_events_use_desc(events, desc); |
| 675 | return 0; /* use Win32_NetworkAdapter::Name */ |
| 676 | } |
| 677 | IEnumWbemClassObject_Release(pEnumerator); |
| 678 | |
| 679 | hr = IWbemClassObject_Get(pObj, L"Name", 0, &vt, NULL, NULL); |
| 680 | if (!SUCCEEDED(hr)) { |
| 681 | wpa_printf(MSG_DEBUG, "ndis_events: Failed to get Name from " |
| 682 | "Win32_PnPEntity: 0x%x", (int) hr); |
| 683 | IWbemClassObject_Release(pObj); |
| 684 | IWbemServices_Release(pSvc); |
| 685 | if (events->adapter_desc == NULL) |
| 686 | return ndis_events_use_desc(events, desc); |
| 687 | return 0; /* use Win32_NetworkAdapter::Name */ |
| 688 | } |
| 689 | |
| 690 | wpa_printf(MSG_DEBUG, "ndis_events: Win32_PnPEntity::Name='%S'", |
| 691 | vt.bstrVal); |
| 692 | os_free(events->adapter_desc); |
| 693 | events->adapter_desc = _wcsdup(vt.bstrVal); |
| 694 | VariantClear(&vt); |
| 695 | |
| 696 | IWbemClassObject_Release(pObj); |
| 697 | |
| 698 | IWbemServices_Release(pSvc); |
| 699 | |
| 700 | if (events->adapter_desc == NULL) |
| 701 | return ndis_events_use_desc(events, desc); |
| 702 | |
| 703 | return 0; |
| 704 | } |
| 705 | |
| 706 | |
| 707 | struct ndis_events_data * |
| 708 | ndis_events_init(HANDLE *read_pipe, HANDLE *event_avail, |
| 709 | const char *ifname, const char *desc) |
| 710 | { |
| 711 | HRESULT hr; |
| 712 | IWbemObjectSink *pSink; |
| 713 | struct ndis_events_data *events; |
| 714 | |
| 715 | events = os_zalloc(sizeof(*events)); |
| 716 | if (events == NULL) { |
| 717 | wpa_printf(MSG_ERROR, "Could not allocate sink for events."); |
| 718 | return NULL; |
| 719 | } |
| 720 | events->ifname = os_strdup(ifname); |
| 721 | if (events->ifname == NULL) { |
| 722 | os_free(events); |
| 723 | return NULL; |
| 724 | } |
| 725 | |
| 726 | if (wmi_refcnt++ == 0) { |
| 727 | hr = CoInitializeEx(0, COINIT_MULTITHREADED); |
| 728 | if (FAILED(hr)) { |
| 729 | wpa_printf(MSG_ERROR, "CoInitializeEx() failed - " |
| 730 | "returned 0x%x", (int) hr); |
| 731 | os_free(events); |
| 732 | return NULL; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | if (wmi_first) { |
| 737 | /* CoInitializeSecurity() must be called once and only once |
| 738 | * per process, so let's use wmi_first flag to protect against |
| 739 | * multiple calls. */ |
| 740 | wmi_first = 0; |
| 741 | |
| 742 | hr = CoInitializeSecurity(NULL, -1, NULL, NULL, |
| 743 | RPC_C_AUTHN_LEVEL_PKT_PRIVACY, |
| 744 | RPC_C_IMP_LEVEL_IMPERSONATE, |
| 745 | NULL, EOAC_SECURE_REFS, NULL); |
| 746 | if (FAILED(hr)) { |
| 747 | wpa_printf(MSG_ERROR, "CoInitializeSecurity() failed " |
| 748 | "- returned 0x%x", (int) hr); |
| 749 | os_free(events); |
| 750 | return NULL; |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | hr = CoCreateInstance(&CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, |
| 755 | &IID_IWbemLocator, |
| 756 | (LPVOID *) (void *) &events->pLoc); |
| 757 | if (FAILED(hr)) { |
| 758 | wpa_printf(MSG_ERROR, "CoCreateInstance() failed - returned " |
| 759 | "0x%x", (int) hr); |
| 760 | CoUninitialize(); |
| 761 | os_free(events); |
| 762 | return NULL; |
| 763 | } |
| 764 | |
| 765 | if (ndis_events_get_adapter(events, ifname, desc) < 0) { |
| 766 | CoUninitialize(); |
| 767 | os_free(events); |
| 768 | return NULL; |
| 769 | } |
| 770 | wpa_printf(MSG_DEBUG, "ndis_events: use adapter descriptor '%S'", |
| 771 | events->adapter_desc); |
| 772 | |
| 773 | hr = call_IWbemLocator_ConnectServer( |
| 774 | events->pLoc, L"ROOT\\WMI", NULL, NULL, |
| 775 | 0, 0, 0, 0, &events->pSvc); |
| 776 | if (FAILED(hr)) { |
| 777 | wpa_printf(MSG_ERROR, "Could not connect to server - error " |
| 778 | "0x%x", (int) hr); |
| 779 | CoUninitialize(); |
| 780 | os_free(events->adapter_desc); |
| 781 | os_free(events); |
| 782 | return NULL; |
| 783 | } |
| 784 | wpa_printf(MSG_DEBUG, "Connected to ROOT\\WMI."); |
| 785 | |
| 786 | ndis_events_constructor(events); |
| 787 | pSink = &events->sink; |
| 788 | pSink->lpVtbl = &events->sink_vtbl; |
| 789 | events->sink_vtbl.QueryInterface = ndis_events_query_interface; |
| 790 | events->sink_vtbl.AddRef = ndis_events_add_ref; |
| 791 | events->sink_vtbl.Release = ndis_events_release; |
| 792 | events->sink_vtbl.Indicate = ndis_events_indicate; |
| 793 | events->sink_vtbl.SetStatus = ndis_events_set_status; |
| 794 | |
| 795 | if (register_async_notification(pSink, events->pSvc) < 0) { |
| 796 | wpa_printf(MSG_DEBUG, "Failed to register async " |
| 797 | "notifications"); |
| 798 | ndis_events_destructor(events); |
| 799 | os_free(events->adapter_desc); |
| 800 | os_free(events); |
| 801 | return NULL; |
| 802 | } |
| 803 | |
| 804 | *read_pipe = events->read_pipe; |
| 805 | *event_avail = events->event_avail; |
| 806 | |
| 807 | return events; |
| 808 | } |