1 /* 2 * Copyright 2008, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "wifi" 18 19 #include "jni.h" 20 #include <ScopedUtfChars.h> 21 #include <utils/misc.h> 22 #include <android_runtime/AndroidRuntime.h> 23 #include <utils/Log.h> 24 #include <utils/String16.h> 25 #include <ctype.h> 26 27 #include "wifi.h" 28 #include "wifi_hal.h" 29 #include "jni_helper.h" 30 31 #define REPLY_BUF_SIZE 4096 // wpa_supplicant's maximum size. 32 #define EVENT_BUF_SIZE 2048 33 34 namespace android { 35 36 static jint DBG = false; 37 38 static bool doCommand(JNIEnv* env, jstring javaCommand, 39 char* reply, size_t reply_len) { 40 ScopedUtfChars command(env, javaCommand); 41 if (command.c_str() == NULL) { 42 return false; // ScopedUtfChars already threw on error. 43 } 44 45 if (DBG) { 46 ALOGD("doCommand: %s", command.c_str()); 47 } 48 49 --reply_len; // Ensure we have room to add NUL termination. 50 if (::wifi_command(command.c_str(), reply, &reply_len) != 0) { 51 return false; 52 } 53 54 // Strip off trailing newline. 55 if (reply_len > 0 && reply[reply_len-1] == '\n') { 56 reply[reply_len-1] = '\0'; 57 } else { 58 reply[reply_len] = '\0'; 59 } 60 return true; 61 } 62 63 static jint doIntCommand(JNIEnv* env, jstring javaCommand) { 64 char reply[REPLY_BUF_SIZE]; 65 if (!doCommand(env, javaCommand, reply, sizeof(reply))) { 66 return -1; 67 } 68 return static_cast<jint>(atoi(reply)); 69 } 70 71 static jboolean doBooleanCommand(JNIEnv* env, jstring javaCommand) { 72 char reply[REPLY_BUF_SIZE]; 73 if (!doCommand(env, javaCommand, reply, sizeof(reply))) { 74 return JNI_FALSE; 75 } 76 return (strcmp(reply, "OK") == 0); 77 } 78 79 // Send a command to the supplicant, and return the reply as a String. 80 static jstring doStringCommand(JNIEnv* env, jstring javaCommand) { 81 char reply[REPLY_BUF_SIZE]; 82 if (!doCommand(env, javaCommand, reply, sizeof(reply))) { 83 return NULL; 84 } 85 return env->NewStringUTF(reply); 86 } 87 88 static jboolean android_net_wifi_isDriverLoaded(JNIEnv* env, jobject) 89 { 90 return (::is_wifi_driver_loaded() == 1); 91 } 92 93 static jboolean android_net_wifi_loadDriver(JNIEnv* env, jobject) 94 { 95 return (::wifi_load_driver() == 0); 96 } 97 98 static jboolean android_net_wifi_unloadDriver(JNIEnv* env, jobject) 99 { 100 return (::wifi_unload_driver() == 0); 101 } 102 103 static jboolean android_net_wifi_startSupplicant(JNIEnv* env, jobject, jboolean p2pSupported) 104 { 105 return (::wifi_start_supplicant(p2pSupported) == 0); 106 } 107 108 static jboolean android_net_wifi_killSupplicant(JNIEnv* env, jobject, jboolean p2pSupported) 109 { 110 return (::wifi_stop_supplicant(p2pSupported) == 0); 111 } 112 113 static jboolean android_net_wifi_connectToSupplicant(JNIEnv* env, jobject) 114 { 115 return (::wifi_connect_to_supplicant() == 0); 116 } 117 118 static void android_net_wifi_closeSupplicantConnection(JNIEnv* env, jobject) 119 { 120 ::wifi_close_supplicant_connection(); 121 } 122 123 static jstring android_net_wifi_waitForEvent(JNIEnv* env, jobject) 124 { 125 char buf[EVENT_BUF_SIZE]; 126 int nread = ::wifi_wait_for_event(buf, sizeof buf); 127 if (nread > 0) { 128 return env->NewStringUTF(buf); 129 } else { 130 return NULL; 131 } 132 } 133 134 static jboolean android_net_wifi_doBooleanCommand(JNIEnv* env, jobject, jstring javaCommand) { 135 return doBooleanCommand(env, javaCommand); 136 } 137 138 static jint android_net_wifi_doIntCommand(JNIEnv* env, jobject, jstring javaCommand) { 139 return doIntCommand(env, javaCommand); 140 } 141 142 static jstring android_net_wifi_doStringCommand(JNIEnv* env, jobject, jstring javaCommand) { 143 return doStringCommand(env,javaCommand); 144 } 145 146 /* wifi_hal <==> WifiNative bridge */ 147 148 static jclass mCls; /* saved WifiNative object */ 149 static JavaVM *mVM; /* saved JVM pointer */ 150 151 static const char *WifiHandleVarName = "sWifiHalHandle"; 152 static const char *WifiIfaceHandleVarName = "sWifiIfaceHandles"; 153 static jmethodID OnScanResultsMethodID; 154 155 static JNIEnv *getEnv() { 156 JNIEnv *env = NULL; 157 mVM->AttachCurrentThread(&env, NULL); 158 return env; 159 } 160 161 static wifi_handle getWifiHandle(JNIEnv *env, jclass cls) { 162 return (wifi_handle) getStaticLongField(env, cls, WifiHandleVarName); 163 } 164 165 static wifi_interface_handle getIfaceHandle(JNIEnv *env, jclass cls, jint index) { 166 return (wifi_interface_handle) getStaticLongArrayField(env, cls, WifiIfaceHandleVarName, index); 167 } 168 169 static jobject createScanResult(JNIEnv *env, wifi_scan_result *result) { 170 171 // ALOGD("creating scan result"); 172 173 jobject scanResult = createObject(env, "android/net/wifi/ScanResult"); 174 if (scanResult == NULL) { 175 ALOGE("Error in creating scan result"); 176 return NULL; 177 } 178 179 // ALOGD("setting SSID to %s", result.ssid); 180 setStringField(env, scanResult, "SSID", result->ssid); 181 182 char bssid[32]; 183 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", result->bssid[0], result->bssid[1], 184 result->bssid[2], result->bssid[3], result->bssid[4], result->bssid[5]); 185 186 setStringField(env, scanResult, "BSSID", bssid); 187 188 setIntField(env, scanResult, "level", result->rssi); 189 setIntField(env, scanResult, "frequency", result->channel); 190 setLongField(env, scanResult, "timestamp", result->ts); 191 192 return scanResult; 193 } 194 195 static jboolean android_net_wifi_startHal(JNIEnv* env, jclass cls) { 196 wifi_handle halHandle = getWifiHandle(env, cls); 197 198 if (halHandle == NULL) { 199 wifi_error res = wifi_initialize(&halHandle); 200 if (res == WIFI_SUCCESS) { 201 setStaticLongField(env, cls, WifiHandleVarName, (jlong)halHandle); 202 ALOGD("Did set static halHandle = %p", halHandle); 203 } 204 env->GetJavaVM(&mVM); 205 mCls = (jclass) env->NewGlobalRef(cls); 206 ALOGD("halHandle = %p, mVM = %p, mCls = %p", halHandle, mVM, mCls); 207 return res == WIFI_SUCCESS; 208 } else { 209 return true; 210 } 211 } 212 213 void android_net_wifi_hal_cleaned_up_handler(wifi_handle handle) { 214 ALOGD("In wifi cleaned up handler"); 215 216 JNIEnv * env = getEnv(); 217 setStaticLongField(env, mCls, WifiHandleVarName, 0); 218 env->DeleteGlobalRef(mCls); 219 mCls = NULL; 220 mVM = NULL; 221 } 222 223 static void android_net_wifi_stopHal(JNIEnv* env, jclass cls) { 224 ALOGD("In wifi stop Hal"); 225 wifi_handle halHandle = getWifiHandle(env, cls); 226 wifi_cleanup(halHandle, android_net_wifi_hal_cleaned_up_handler); 227 } 228 229 static void android_net_wifi_waitForHalEvents(JNIEnv* env, jclass cls) { 230 231 ALOGD("waitForHalEvents called, vm = %p, obj = %p, env = %p", mVM, mCls, env); 232 233 wifi_handle halHandle = getWifiHandle(env, cls); 234 wifi_event_loop(halHandle); 235 } 236 237 static int android_net_wifi_getInterfaces(JNIEnv *env, jclass cls) { 238 int n = 0; 239 wifi_handle halHandle = getWifiHandle(env, cls); 240 wifi_interface_handle *ifaceHandles = NULL; 241 int result = wifi_get_ifaces(halHandle, &n, &ifaceHandles); 242 if (result < 0) { 243 return result; 244 } 245 246 if (n < 0) { 247 THROW(env, "android_net_wifi_getInterfaces no interfaces"); 248 return 0; 249 } 250 251 if (ifaceHandles == NULL) { 252 THROW(env, "android_net_wifi_getInterfaces null interface array"); 253 return 0; 254 } 255 256 if (n > 8) { 257 THROW(env, "Too many interfaces"); 258 return 0; 259 } 260 261 jlongArray array = (env)->NewLongArray(n); 262 if (array == NULL) { 263 THROW(env, "Error in accessing array"); 264 return 0; 265 } 266 267 jlong elems[8]; 268 for (int i = 0; i < n; i++) { 269 elems[i] = reinterpret_cast<jlong>(ifaceHandles[i]); 270 } 271 env->SetLongArrayRegion(array, 0, n, elems); 272 setStaticLongArrayField(env, cls, WifiIfaceHandleVarName, array); 273 274 return (result < 0) ? result : n; 275 } 276 277 static jstring android_net_wifi_getInterfaceName(JNIEnv *env, jclass cls, jint i) { 278 char buf[EVENT_BUF_SIZE]; 279 280 jlong value = getStaticLongArrayField(env, cls, WifiIfaceHandleVarName, i); 281 wifi_interface_handle handle = (wifi_interface_handle) value; 282 int result = ::wifi_get_iface_name(handle, buf, sizeof(buf)); 283 if (result < 0) { 284 return NULL; 285 } else { 286 return env->NewStringUTF(buf); 287 } 288 } 289 290 291 static void onScanResultsAvailable(wifi_request_id id, unsigned num_results) { 292 293 JNIEnv *env = NULL; 294 mVM->AttachCurrentThread(&env, NULL); 295 296 ALOGD("onScanResultsAvailable called, vm = %p, obj = %p, env = %p", mVM, mCls, env); 297 298 reportEvent(env, mCls, "onScanResultsAvailable", "(I)V", id); 299 } 300 301 static void onScanEvent(wifi_scan_event event, unsigned status) { 302 JNIEnv *env = NULL; 303 mVM->AttachCurrentThread(&env, NULL); 304 305 ALOGD("onScanStatus called, vm = %p, obj = %p, env = %p", mVM, mCls, env); 306 307 reportEvent(env, mCls, "onScanStatus", "(I)V", status); 308 } 309 310 static void onFullScanResult(wifi_request_id id, wifi_scan_result *result) { 311 312 JNIEnv *env = NULL; 313 mVM->AttachCurrentThread(&env, NULL); 314 315 ALOGD("onFullScanResult called, vm = %p, obj = %p, env = %p", mVM, mCls, env); 316 317 jobject scanResult = createScanResult(env, result); 318 319 ALOGD("Creating a byte array of length %d", result->ie_length); 320 321 jbyteArray elements = env->NewByteArray(result->ie_length); 322 if (elements == NULL) { 323 ALOGE("Error in allocating array"); 324 return; 325 } 326 327 ALOGE("Setting byte array"); 328 329 jbyte *bytes = (jbyte *)&(result->ie_data[0]); 330 env->SetByteArrayRegion(elements, 0, result->ie_length, bytes); 331 332 ALOGE("Returning result"); 333 334 reportEvent(env, mCls, "onFullScanResult", "(ILandroid/net/wifi/ScanResult;[B)V", id, 335 scanResult, elements); 336 337 env->DeleteLocalRef(scanResult); 338 env->DeleteLocalRef(elements); 339 } 340 341 static jboolean android_net_wifi_startScan( 342 JNIEnv *env, jclass cls, jint iface, jint id, jobject settings) { 343 344 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 345 ALOGD("starting scan on interface[%d] = %p", iface, handle); 346 347 wifi_scan_cmd_params params; 348 memset(¶ms, 0, sizeof(params)); 349 350 params.base_period = getIntField(env, settings, "base_period_ms"); 351 params.max_ap_per_scan = getIntField(env, settings, "max_ap_per_scan"); 352 params.report_threshold = getIntField(env, settings, "report_threshold"); 353 354 ALOGD("Initialized common fields %d, %d, %d", params.base_period, 355 params.max_ap_per_scan, params.report_threshold); 356 357 const char *bucket_array_type = "[Lcom/android/server/wifi/WifiNative$BucketSettings;"; 358 const char *channel_array_type = "[Lcom/android/server/wifi/WifiNative$ChannelSettings;"; 359 360 jobjectArray buckets = (jobjectArray)getObjectField(env, settings, "buckets", bucket_array_type); 361 params.num_buckets = getIntField(env, settings, "num_buckets"); 362 363 ALOGD("Initialized num_buckets to %d", params.num_buckets); 364 365 for (int i = 0; i < params.num_buckets; i++) { 366 jobject bucket = getObjectArrayField(env, settings, "buckets", bucket_array_type, i); 367 368 params.buckets[i].bucket = getIntField(env, bucket, "bucket"); 369 params.buckets[i].band = (wifi_band) getIntField(env, bucket, "band"); 370 params.buckets[i].period = getIntField(env, bucket, "period_ms"); 371 372 ALOGD("Initialized common bucket fields %d:%d:%d", params.buckets[i].bucket, 373 params.buckets[i].band, params.buckets[i].period); 374 375 int report_events = getIntField(env, bucket, "report_events"); 376 params.buckets[i].report_events = report_events; 377 378 ALOGD("Initialized report events to %d", params.buckets[i].report_events); 379 380 jobjectArray channels = (jobjectArray)getObjectField( 381 env, bucket, "channels", channel_array_type); 382 383 params.buckets[i].num_channels = getIntField(env, bucket, "num_channels"); 384 ALOGD("Initialized num_channels to %d", params.buckets[i].num_channels); 385 386 for (int j = 0; j < params.buckets[i].num_channels; j++) { 387 jobject channel = getObjectArrayField(env, bucket, "channels", channel_array_type, j); 388 389 params.buckets[i].channels[j].channel = getIntField(env, channel, "frequency"); 390 params.buckets[i].channels[j].dwellTimeMs = getIntField(env, channel, "dwell_time_ms"); 391 392 bool passive = getBoolField(env, channel, "passive"); 393 params.buckets[i].channels[j].passive = (passive ? 1 : 0); 394 395 ALOGD("Initialized channel %d", params.buckets[i].channels[j].channel); 396 } 397 } 398 399 ALOGD("Initialized all fields"); 400 401 wifi_scan_result_handler handler; 402 memset(&handler, 0, sizeof(handler)); 403 handler.on_scan_results_available = &onScanResultsAvailable; 404 handler.on_full_scan_result = &onFullScanResult; 405 handler.on_scan_event = &onScanEvent; 406 407 return wifi_start_gscan(id, handle, params, handler) == WIFI_SUCCESS; 408 } 409 410 static jboolean android_net_wifi_stopScan(JNIEnv *env, jclass cls, jint iface, jint id) { 411 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 412 ALOGD("stopping scan on interface[%d] = %p", iface, handle); 413 414 return wifi_stop_gscan(id, handle) == WIFI_SUCCESS; 415 } 416 417 static jobject android_net_wifi_getScanResults( 418 JNIEnv *env, jclass cls, jint iface, jboolean flush) { 419 420 wifi_scan_result results[256]; 421 int num_results = 256; 422 423 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 424 ALOGD("getting scan results on interface[%d] = %p", iface, handle); 425 426 int result = wifi_get_cached_gscan_results(handle, 1, num_results, results, &num_results); 427 if (result == WIFI_SUCCESS) { 428 jclass clsScanResult = (env)->FindClass("android/net/wifi/ScanResult"); 429 if (clsScanResult == NULL) { 430 ALOGE("Error in accessing class"); 431 return NULL; 432 } 433 434 jobjectArray scanResults = env->NewObjectArray(num_results, clsScanResult, NULL); 435 if (scanResults == NULL) { 436 ALOGE("Error in allocating array"); 437 return NULL; 438 } 439 440 for (int i = 0; i < num_results; i++) { 441 442 jobject scanResult = createObject(env, "android/net/wifi/ScanResult"); 443 if (scanResult == NULL) { 444 ALOGE("Error in creating scan result"); 445 return NULL; 446 } 447 448 setStringField(env, scanResult, "SSID", results[i].ssid); 449 450 char bssid[32]; 451 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", results[i].bssid[0], 452 results[i].bssid[1], results[i].bssid[2], results[i].bssid[3], 453 results[i].bssid[4], results[i].bssid[5]); 454 455 setStringField(env, scanResult, "BSSID", bssid); 456 457 setIntField(env, scanResult, "level", results[i].rssi); 458 setIntField(env, scanResult, "frequency", results[i].channel); 459 setLongField(env, scanResult, "timestamp", results[i].ts); 460 461 env->SetObjectArrayElement(scanResults, i, scanResult); 462 env->DeleteLocalRef(scanResult); 463 } 464 465 return scanResults; 466 } else { 467 return NULL; 468 } 469 } 470 471 472 static jboolean android_net_wifi_getScanCapabilities( 473 JNIEnv *env, jclass cls, jint iface, jobject capabilities) { 474 475 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 476 ALOGD("getting scan capabilities on interface[%d] = %p", iface, handle); 477 478 wifi_gscan_capabilities c; 479 memset(&c, 0, sizeof(c)); 480 int result = wifi_get_gscan_capabilities(handle, &c); 481 if (result != WIFI_SUCCESS) { 482 ALOGD("failed to get capabilities : %d", result); 483 return JNI_FALSE; 484 } 485 486 setIntField(env, capabilities, "max_scan_cache_size", c.max_scan_cache_size); 487 setIntField(env, capabilities, "max_scan_buckets", c.max_scan_buckets); 488 setIntField(env, capabilities, "max_ap_cache_per_scan", c.max_ap_cache_per_scan); 489 setIntField(env, capabilities, "max_rssi_sample_size", c.max_rssi_sample_size); 490 setIntField(env, capabilities, "max_scan_reporting_threshold", c.max_scan_reporting_threshold); 491 setIntField(env, capabilities, "max_hotlist_aps", c.max_hotlist_aps); 492 setIntField(env, capabilities, "max_significant_wifi_change_aps", 493 c.max_significant_wifi_change_aps); 494 495 return JNI_TRUE; 496 } 497 498 499 static byte parseHexChar(char ch) { 500 if (isdigit(ch)) 501 return ch - '0'; 502 else if ('A' <= ch && ch <= 'F') 503 return ch - 'A' + 10; 504 else if ('a' <= ch && ch <= 'f') 505 return ch - 'a' + 10; 506 else { 507 ALOGE("invalid character in bssid %c", ch); 508 return 0; 509 } 510 } 511 512 static byte parseHexByte(const char * &str) { 513 byte b = parseHexChar(str[0]); 514 if (str[1] == ':' || str[1] == '\0') { 515 str += 2; 516 return b; 517 } else { 518 b = b << 4 | parseHexChar(str[1]); 519 str += 3; 520 return b; 521 } 522 } 523 524 static void parseMacAddress(const char *str, mac_addr addr) { 525 addr[0] = parseHexByte(str); 526 addr[1] = parseHexByte(str); 527 addr[2] = parseHexByte(str); 528 addr[3] = parseHexByte(str); 529 addr[4] = parseHexByte(str); 530 addr[5] = parseHexByte(str); 531 } 532 533 static bool parseMacAddress(JNIEnv *env, jobject obj, mac_addr addr) { 534 jstring macAddrString = (jstring) getObjectField( 535 env, obj, "bssid", "Ljava/lang/String;"); 536 537 if (macAddrString == NULL) { 538 ALOGE("Error getting bssid field"); 539 return false; 540 } 541 542 const char *bssid = env->GetStringUTFChars(macAddrString, NULL); 543 if (bssid == NULL) { 544 ALOGE("Error getting bssid"); 545 return false; 546 } 547 548 parseMacAddress(bssid, addr); 549 return true; 550 } 551 552 static void onHotlistApFound(wifi_request_id id, 553 unsigned num_results, wifi_scan_result *results) { 554 555 JNIEnv *env = NULL; 556 mVM->AttachCurrentThread(&env, NULL); 557 558 ALOGD("onHotlistApFound called, vm = %p, obj = %p, env = %p, num_results = %d", 559 mVM, mCls, env, num_results); 560 561 jclass clsScanResult = (env)->FindClass("android/net/wifi/ScanResult"); 562 if (clsScanResult == NULL) { 563 ALOGE("Error in accessing class"); 564 return; 565 } 566 567 jobjectArray scanResults = env->NewObjectArray(num_results, clsScanResult, NULL); 568 if (scanResults == NULL) { 569 ALOGE("Error in allocating array"); 570 return; 571 } 572 573 for (unsigned i = 0; i < num_results; i++) { 574 575 jobject scanResult = createObject(env, "android/net/wifi/ScanResult"); 576 if (scanResult == NULL) { 577 ALOGE("Error in creating scan result"); 578 return; 579 } 580 581 setStringField(env, scanResult, "SSID", results[i].ssid); 582 583 char bssid[32]; 584 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", results[i].bssid[0], results[i].bssid[1], 585 results[i].bssid[2], results[i].bssid[3], results[i].bssid[4], results[i].bssid[5]); 586 587 setStringField(env, scanResult, "BSSID", bssid); 588 589 setIntField(env, scanResult, "level", results[i].rssi); 590 setIntField(env, scanResult, "frequency", results[i].channel); 591 setLongField(env, scanResult, "timestamp", results[i].ts); 592 593 env->SetObjectArrayElement(scanResults, i, scanResult); 594 595 ALOGD("Found AP %32s %s", results[i].ssid, bssid); 596 } 597 598 reportEvent(env, mCls, "onHotlistApFound", "(I[Landroid/net/wifi/ScanResult;)V", 599 id, scanResults); 600 } 601 602 static jboolean android_net_wifi_setHotlist( 603 JNIEnv *env, jclass cls, jint iface, jint id, jobject ap) { 604 605 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 606 ALOGD("setting hotlist on interface[%d] = %p", iface, handle); 607 608 wifi_bssid_hotlist_params params; 609 memset(¶ms, 0, sizeof(params)); 610 611 jobjectArray array = (jobjectArray) getObjectField(env, ap, 612 "bssidInfos", "[Landroid/net/wifi/WifiScanner$BssidInfo;"); 613 params.num_ap = env->GetArrayLength(array); 614 615 if (params.num_ap == 0) { 616 ALOGE("Error in accesing array"); 617 return false; 618 } 619 620 for (int i = 0; i < params.num_ap; i++) { 621 jobject objAp = env->GetObjectArrayElement(array, i); 622 623 jstring macAddrString = (jstring) getObjectField( 624 env, objAp, "bssid", "Ljava/lang/String;"); 625 if (macAddrString == NULL) { 626 ALOGE("Error getting bssid field"); 627 return false; 628 } 629 630 const char *bssid = env->GetStringUTFChars(macAddrString, NULL); 631 if (bssid == NULL) { 632 ALOGE("Error getting bssid"); 633 return false; 634 } 635 parseMacAddress(bssid, params.ap[i].bssid); 636 637 mac_addr addr; 638 memcpy(addr, params.ap[i].bssid, sizeof(mac_addr)); 639 640 char bssidOut[32]; 641 sprintf(bssidOut, "%0x:%0x:%0x:%0x:%0x:%0x", addr[0], addr[1], 642 addr[2], addr[3], addr[4], addr[5]); 643 644 ALOGD("Added bssid %s", bssidOut); 645 646 params.ap[i].low = getIntField(env, objAp, "low"); 647 params.ap[i].high = getIntField(env, objAp, "high"); 648 } 649 650 wifi_hotlist_ap_found_handler handler; 651 memset(&handler, 0, sizeof(handler)); 652 653 handler.on_hotlist_ap_found = &onHotlistApFound; 654 return wifi_set_bssid_hotlist(id, handle, params, handler) == WIFI_SUCCESS; 655 } 656 657 static jboolean android_net_wifi_resetHotlist( 658 JNIEnv *env, jclass cls, jint iface, jint id) { 659 660 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 661 ALOGD("resetting hotlist on interface[%d] = %p", iface, handle); 662 663 return wifi_reset_bssid_hotlist(id, handle) == WIFI_SUCCESS; 664 } 665 666 void onSignificantWifiChange(wifi_request_id id, 667 unsigned num_results, wifi_significant_change_result **results) { 668 JNIEnv *env = NULL; 669 mVM->AttachCurrentThread(&env, NULL); 670 671 ALOGD("onSignificantWifiChange called, vm = %p, obj = %p, env = %p", mVM, mCls, env); 672 673 jclass clsScanResult = (env)->FindClass("android/net/wifi/ScanResult"); 674 if (clsScanResult == NULL) { 675 ALOGE("Error in accessing class"); 676 return; 677 } 678 679 jobjectArray scanResults = env->NewObjectArray(num_results, clsScanResult, NULL); 680 if (scanResults == NULL) { 681 ALOGE("Error in allocating array"); 682 return; 683 } 684 685 for (unsigned i = 0; i < num_results; i++) { 686 687 wifi_significant_change_result result = *(results[i]); 688 689 jobject scanResult = createObject(env, "android/net/wifi/ScanResult"); 690 if (scanResult == NULL) { 691 ALOGE("Error in creating scan result"); 692 return; 693 } 694 695 // setStringField(env, scanResult, "SSID", results[i].ssid); 696 697 char bssid[32]; 698 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", result.bssid[0], result.bssid[1], 699 result.bssid[2], result.bssid[3], result.bssid[4], result.bssid[5]); 700 701 setStringField(env, scanResult, "BSSID", bssid); 702 703 setIntField(env, scanResult, "level", result.rssi[0]); 704 setIntField(env, scanResult, "frequency", result.channel); 705 // setLongField(env, scanResult, "timestamp", result.ts); 706 707 env->SetObjectArrayElement(scanResults, i, scanResult); 708 } 709 710 reportEvent(env, mCls, "onSignificantWifiChange", "(I[Landroid/net/wifi/ScanResult;)V", 711 id, scanResults); 712 713 } 714 715 static jboolean android_net_wifi_trackSignificantWifiChange( 716 JNIEnv *env, jclass cls, jint iface, jint id, jobject settings) { 717 718 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 719 ALOGD("tracking significant wifi change on interface[%d] = %p", iface, handle); 720 721 wifi_significant_change_params params; 722 memset(¶ms, 0, sizeof(params)); 723 724 params.rssi_sample_size = getIntField(env, settings, "rssiSampleSize"); 725 params.lost_ap_sample_size = getIntField(env, settings, "lostApSampleSize"); 726 params.min_breaching = getIntField(env, settings, "minApsBreachingThreshold"); 727 728 const char *bssid_info_array_type = "[Landroid/net/wifi/WifiScanner$BssidInfo;"; 729 jobjectArray bssids = (jobjectArray)getObjectField( 730 env, settings, "bssidInfos", bssid_info_array_type); 731 params.num_ap = env->GetArrayLength(bssids); 732 733 if (params.num_ap == 0) { 734 ALOGE("Error in accessing array"); 735 return false; 736 } 737 738 ALOGD("Initialized common fields %d, %d, %d, %d", params.rssi_sample_size, 739 params.lost_ap_sample_size, params.min_breaching, params.num_ap); 740 741 for (int i = 0; i < params.num_ap; i++) { 742 jobject objAp = env->GetObjectArrayElement(bssids, i); 743 744 jstring macAddrString = (jstring) getObjectField( 745 env, objAp, "bssid", "Ljava/lang/String;"); 746 if (macAddrString == NULL) { 747 ALOGE("Error getting bssid field"); 748 return false; 749 } 750 751 const char *bssid = env->GetStringUTFChars(macAddrString, NULL); 752 if (bssid == NULL) { 753 ALOGE("Error getting bssid"); 754 return false; 755 } 756 757 mac_addr addr; 758 parseMacAddress(bssid, addr); 759 memcpy(params.ap[i].bssid, addr, sizeof(mac_addr)); 760 761 char bssidOut[32]; 762 sprintf(bssidOut, "%02x:%02x:%02x:%02x:%02x:%02x", addr[0], addr[1], 763 addr[2], addr[3], addr[4], addr[5]); 764 765 params.ap[i].low = getIntField(env, objAp, "low"); 766 params.ap[i].high = getIntField(env, objAp, "high"); 767 768 ALOGD("Added bssid %s, [%04d, %04d]", bssidOut, params.ap[i].low, params.ap[i].high); 769 } 770 771 ALOGD("Added %d bssids", params.num_ap); 772 773 wifi_significant_change_handler handler; 774 memset(&handler, 0, sizeof(handler)); 775 776 handler.on_significant_change = &onSignificantWifiChange; 777 return wifi_set_significant_change_handler(id, handle, params, handler) == WIFI_SUCCESS; 778 } 779 780 static jboolean android_net_wifi_untrackSignificantWifiChange( 781 JNIEnv *env, jclass cls, jint iface, jint id) { 782 783 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 784 ALOGD("resetting significant wifi change on interface[%d] = %p", iface, handle); 785 786 return wifi_reset_significant_change_handler(id, handle) == WIFI_SUCCESS; 787 } 788 789 wifi_iface_stat link_stat; 790 wifi_radio_stat radio_stat; // L release has support for only one radio 791 792 void onLinkStatsResults(wifi_request_id id, wifi_iface_stat *iface_stat, 793 int num_radios, wifi_radio_stat *radio_stats) 794 { 795 if (iface_stat != 0) { 796 memcpy(&link_stat, iface_stat, sizeof(wifi_iface_stat)); 797 } else { 798 memset(&link_stat, 0, sizeof(wifi_iface_stat)); 799 } 800 801 if (num_radios > 0 && radio_stats != 0) { 802 memcpy(&radio_stat, radio_stats, sizeof(wifi_radio_stat)); 803 } else { 804 memset(&radio_stat, 0, sizeof(wifi_radio_stat)); 805 } 806 } 807 808 static jobject android_net_wifi_getLinkLayerStats (JNIEnv *env, jclass cls, jint iface) { 809 810 wifi_stats_result_handler handler; 811 memset(&handler, 0, sizeof(handler)); 812 handler.on_link_stats_results = &onLinkStatsResults; 813 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 814 int result = wifi_get_link_stats(0, handle, handler); 815 if (result < 0) { 816 ALOGE("android_net_wifi_getLinkLayerStats: failed to get link statistics\n"); 817 return NULL; 818 } 819 820 jobject wifiLinkLayerStats = createObject(env, "android/net/wifi/WifiLinkLayerStats"); 821 if (wifiLinkLayerStats == NULL) { 822 ALOGE("Error in allocating wifiLinkLayerStats"); 823 return NULL; 824 } 825 826 setIntField(env, wifiLinkLayerStats, "beacon_rx", link_stat.beacon_rx); 827 setIntField(env, wifiLinkLayerStats, "rssi_mgmt", link_stat.rssi_mgmt); 828 setLongField(env, wifiLinkLayerStats, "rxmpdu_be", link_stat.ac[WIFI_AC_BE].rx_mpdu); 829 setLongField(env, wifiLinkLayerStats, "rxmpdu_bk", link_stat.ac[WIFI_AC_BK].rx_mpdu); 830 setLongField(env, wifiLinkLayerStats, "rxmpdu_vi", link_stat.ac[WIFI_AC_VI].rx_mpdu); 831 setLongField(env, wifiLinkLayerStats, "rxmpdu_vo", link_stat.ac[WIFI_AC_VO].rx_mpdu); 832 setLongField(env, wifiLinkLayerStats, "txmpdu_be", link_stat.ac[WIFI_AC_BE].tx_mpdu); 833 setLongField(env, wifiLinkLayerStats, "txmpdu_bk", link_stat.ac[WIFI_AC_BK].tx_mpdu); 834 setLongField(env, wifiLinkLayerStats, "txmpdu_vi", link_stat.ac[WIFI_AC_VI].tx_mpdu); 835 setLongField(env, wifiLinkLayerStats, "txmpdu_vo", link_stat.ac[WIFI_AC_VO].tx_mpdu); 836 setLongField(env, wifiLinkLayerStats, "lostmpdu_be", link_stat.ac[WIFI_AC_BE].mpdu_lost); 837 setLongField(env, wifiLinkLayerStats, "lostmpdu_bk", link_stat.ac[WIFI_AC_BK].mpdu_lost); 838 setLongField(env, wifiLinkLayerStats, "lostmpdu_vi", link_stat.ac[WIFI_AC_VI].mpdu_lost); 839 setLongField(env, wifiLinkLayerStats, "lostmpdu_vo", link_stat.ac[WIFI_AC_VO].mpdu_lost); 840 setLongField(env, wifiLinkLayerStats, "retries_be", link_stat.ac[WIFI_AC_BE].retries); 841 setLongField(env, wifiLinkLayerStats, "retries_bk", link_stat.ac[WIFI_AC_BK].retries); 842 setLongField(env, wifiLinkLayerStats, "retries_vi", link_stat.ac[WIFI_AC_VI].retries); 843 setLongField(env, wifiLinkLayerStats, "retries_vo", link_stat.ac[WIFI_AC_VO].retries); 844 845 846 setIntField(env, wifiLinkLayerStats, "on_time", radio_stat.on_time); 847 setIntField(env, wifiLinkLayerStats, "tx_time", radio_stat.tx_time); 848 setIntField(env, wifiLinkLayerStats, "rx_time", radio_stat.rx_time); 849 setIntField(env, wifiLinkLayerStats, "on_time_scan", radio_stat.on_time_scan); 850 851 return wifiLinkLayerStats; 852 } 853 854 static jint android_net_wifi_getSupportedFeatures(JNIEnv *env, jclass cls, jint iface) { 855 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 856 feature_set set = 0; 857 858 wifi_error result = WIFI_SUCCESS; 859 /* 860 set = WIFI_FEATURE_INFRA 861 | WIFI_FEATURE_INFRA_5G 862 | WIFI_FEATURE_HOTSPOT 863 | WIFI_FEATURE_P2P 864 | WIFI_FEATURE_SOFT_AP 865 | WIFI_FEATURE_GSCAN 866 | WIFI_FEATURE_PNO 867 | WIFI_FEATURE_TDLS 868 | WIFI_FEATURE_EPR; 869 */ 870 871 result = wifi_get_supported_feature_set(handle, &set); 872 if (result == WIFI_SUCCESS) { 873 /* Temporary workaround for RTT capability */ 874 set = set | WIFI_FEATURE_D2AP_RTT; 875 ALOGD("wifi_get_supported_feature_set returned set = 0x%x", set); 876 return set; 877 } else { 878 ALOGD("wifi_get_supported_feature_set returned error = 0x%x", result); 879 return 0; 880 } 881 } 882 883 static void onRttResults(wifi_request_id id, unsigned num_results, wifi_rtt_result results[]) { 884 JNIEnv *env = NULL; 885 mVM->AttachCurrentThread(&env, NULL); 886 887 ALOGD("onRttResults called, vm = %p, obj = %p, env = %p", mVM, mCls, env); 888 889 jclass clsRttResult = (env)->FindClass("android/net/wifi/RttManager$RttResult"); 890 if (clsRttResult == NULL) { 891 ALOGE("Error in accessing class"); 892 return; 893 } 894 895 jobjectArray rttResults = env->NewObjectArray(num_results, clsRttResult, NULL); 896 if (rttResults == NULL) { 897 ALOGE("Error in allocating array"); 898 return; 899 } 900 901 for (unsigned i = 0; i < num_results; i++) { 902 903 wifi_rtt_result& result = results[i]; 904 905 jobject rttResult = createObject(env, "android/net/wifi/RttManager$RttResult"); 906 if (rttResult == NULL) { 907 ALOGE("Error in creating rtt result"); 908 return; 909 } 910 911 char bssid[32]; 912 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", result.addr[0], result.addr[1], 913 result.addr[2], result.addr[3], result.addr[4], result.addr[5]); 914 915 setStringField(env, rttResult, "bssid", bssid); 916 setIntField(env, rttResult, "status", result.status); 917 setIntField(env, rttResult, "requestType", result.type); 918 setLongField(env, rttResult, "ts", result.ts); 919 setIntField(env, rttResult, "rssi", result.rssi); 920 setIntField(env, rttResult, "rssi_spread", result.rssi_spread); 921 setIntField(env, rttResult, "tx_rate", result.tx_rate.bitrate); 922 setLongField(env, rttResult, "rtt_ns", result.rtt); 923 setLongField(env, rttResult, "rtt_sd_ns", result.rtt_sd); 924 setLongField(env, rttResult, "rtt_spread_ns", result.rtt_spread); 925 setIntField(env, rttResult, "distance_cm", result.distance); 926 setIntField(env, rttResult, "distance_sd_cm", result.distance_sd); 927 setIntField(env, rttResult, "distance_spread_cm", result.distance_spread); 928 929 env->SetObjectArrayElement(rttResults, i, rttResult); 930 } 931 932 reportEvent(env, mCls, "onRttResults", "(I[Landroid/net/wifi/RttManager$RttResult;)V", 933 id, rttResults); 934 } 935 936 const int MaxRttConfigs = 16; 937 938 static jboolean android_net_wifi_requestRange( 939 JNIEnv *env, jclass cls, jint iface, jint id, jobject params) { 940 941 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 942 ALOGD("sending rtt request [%d] = %p", id, handle); 943 944 wifi_rtt_config configs[MaxRttConfigs]; 945 memset(&configs, 0, sizeof(configs)); 946 947 int len = env->GetArrayLength((jobjectArray)params); 948 if (len > MaxRttConfigs) { 949 return false; 950 } 951 952 for (int i = 0; i < len; i++) { 953 954 jobject param = env->GetObjectArrayElement((jobjectArray)params, i); 955 if (param == NULL) { 956 ALOGD("could not get element %d", i); 957 continue; 958 } 959 960 wifi_rtt_config &config = configs[i]; 961 962 parseMacAddress(env, param, config.addr); 963 config.type = (wifi_rtt_type)getIntField(env, param, "requestType"); 964 config.peer = (wifi_peer_type)getIntField(env, param, "deviceType"); 965 config.channel.center_freq = getIntField(env, param, "frequency"); 966 config.channel.width = (wifi_channel_width)getIntField(env, param, "channelWidth"); 967 config.num_samples_per_measurement = getIntField(env, param, "num_samples"); 968 config.num_retries_per_measurement = getIntField(env, param, "num_retries"); 969 } 970 971 wifi_rtt_event_handler handler; 972 handler.on_rtt_results = &onRttResults; 973 974 return wifi_rtt_range_request(id, handle, len, configs, handler) == WIFI_SUCCESS; 975 } 976 977 static jboolean android_net_wifi_cancelRange( 978 JNIEnv *env, jclass cls, jint iface, jint id, jobject params) { 979 980 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 981 ALOGD("cancelling rtt request [%d] = %p", id, handle); 982 983 mac_addr addrs[MaxRttConfigs]; 984 memset(&addrs, 0, sizeof(addrs)); 985 986 int len = env->GetArrayLength((jobjectArray)params); 987 if (len > MaxRttConfigs) { 988 return false; 989 } 990 991 for (int i = 0; i < len; i++) { 992 993 jobject param = env->GetObjectArrayElement((jobjectArray)params, i); 994 if (param == NULL) { 995 ALOGD("could not get element %d", i); 996 continue; 997 } 998 999 parseMacAddress(env, param, addrs[i]); 1000 } 1001 1002 return wifi_rtt_range_cancel(id, handle, len, addrs) == WIFI_SUCCESS; 1003 } 1004 1005 static jboolean android_net_wifi_setScanningMacOui(JNIEnv *env, jclass cls, 1006 jint iface, jbyteArray param) { 1007 1008 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 1009 ALOGD("setting scan oui %p", handle); 1010 1011 static const unsigned oui_len = 3; /* OUI is upper 3 bytes of mac_address */ 1012 int len = env->GetArrayLength(param); 1013 if (len != oui_len) { 1014 ALOGE("invalid oui length %d", len); 1015 return false; 1016 } 1017 1018 jbyte* bytes = env->GetByteArrayElements(param, NULL); 1019 if (bytes == NULL) { 1020 ALOGE("failed to get array"); 1021 return false; 1022 } 1023 1024 return wifi_set_scanning_mac_oui(handle, (byte *)bytes) == WIFI_SUCCESS; 1025 } 1026 1027 static jintArray android_net_wifi_getValidChannels(JNIEnv *env, jclass cls, 1028 jint iface, jint band) { 1029 1030 wifi_interface_handle handle = getIfaceHandle(env, cls, iface); 1031 ALOGD("getting valid channels %p", handle); 1032 1033 static const int MaxChannels = 64; 1034 wifi_channel channels[64]; 1035 int num_channels = 0; 1036 wifi_error result = wifi_get_valid_channels(handle, band, MaxChannels, 1037 channels, &num_channels); 1038 1039 if (result == WIFI_SUCCESS) { 1040 jintArray channelArray = env->NewIntArray(num_channels); 1041 if (channelArray == NULL) { 1042 ALOGE("failed to allocate channel list"); 1043 return NULL; 1044 } 1045 1046 env->SetIntArrayRegion(channelArray, 0, num_channels, channels); 1047 return channelArray; 1048 } else { 1049 ALOGE("failed to get channel list : %d", result); 1050 return NULL; 1051 } 1052 } 1053 1054 // ---------------------------------------------------------------------------- 1055 1056 /* 1057 * JNI registration. 1058 */ 1059 static JNINativeMethod gWifiMethods[] = { 1060 /* name, signature, funcPtr */ 1061 1062 { "loadDriver", "()Z", (void *)android_net_wifi_loadDriver }, 1063 { "isDriverLoaded", "()Z", (void *)android_net_wifi_isDriverLoaded }, 1064 { "unloadDriver", "()Z", (void *)android_net_wifi_unloadDriver }, 1065 { "startSupplicant", "(Z)Z", (void *)android_net_wifi_startSupplicant }, 1066 { "killSupplicant", "(Z)Z", (void *)android_net_wifi_killSupplicant }, 1067 { "connectToSupplicantNative", "()Z", (void *)android_net_wifi_connectToSupplicant }, 1068 { "closeSupplicantConnectionNative", "()V", 1069 (void *)android_net_wifi_closeSupplicantConnection }, 1070 { "waitForEventNative", "()Ljava/lang/String;", (void*)android_net_wifi_waitForEvent }, 1071 { "doBooleanCommandNative", "(Ljava/lang/String;)Z", (void*)android_net_wifi_doBooleanCommand }, 1072 { "doIntCommandNative", "(Ljava/lang/String;)I", (void*)android_net_wifi_doIntCommand }, 1073 { "doStringCommandNative", "(Ljava/lang/String;)Ljava/lang/String;", 1074 (void*) android_net_wifi_doStringCommand }, 1075 { "startHalNative", "()Z", (void*) android_net_wifi_startHal }, 1076 { "stopHalNative", "()V", (void*) android_net_wifi_stopHal }, 1077 { "waitForHalEventNative", "()V", (void*) android_net_wifi_waitForHalEvents }, 1078 { "getInterfacesNative", "()I", (void*) android_net_wifi_getInterfaces}, 1079 { "getInterfaceNameNative", "(I)Ljava/lang/String;", (void*) android_net_wifi_getInterfaceName}, 1080 { "getScanCapabilitiesNative", "(ILcom/android/server/wifi/WifiNative$ScanCapabilities;)Z", 1081 (void *) android_net_wifi_getScanCapabilities}, 1082 { "startScanNative", "(IILcom/android/server/wifi/WifiNative$ScanSettings;)Z", 1083 (void*) android_net_wifi_startScan}, 1084 { "stopScanNative", "(II)Z", (void*) android_net_wifi_stopScan}, 1085 { "getScanResultsNative", "(IZ)[Landroid/net/wifi/ScanResult;", 1086 (void *) android_net_wifi_getScanResults}, 1087 { "setHotlistNative", "(IILandroid/net/wifi/WifiScanner$HotlistSettings;)Z", 1088 (void*) android_net_wifi_setHotlist}, 1089 { "resetHotlistNative", "(II)Z", (void*) android_net_wifi_resetHotlist}, 1090 { "trackSignificantWifiChangeNative", "(IILandroid/net/wifi/WifiScanner$WifiChangeSettings;)Z", 1091 (void*) android_net_wifi_trackSignificantWifiChange}, 1092 { "untrackSignificantWifiChangeNative", "(II)Z", 1093 (void*) android_net_wifi_untrackSignificantWifiChange}, 1094 { "getWifiLinkLayerStatsNative", "(I)Landroid/net/wifi/WifiLinkLayerStats;", 1095 (void*) android_net_wifi_getLinkLayerStats}, 1096 { "getSupportedFeatureSetNative", "(I)I", 1097 (void*) android_net_wifi_getSupportedFeatures}, 1098 { "requestRangeNative", "(II[Landroid/net/wifi/RttManager$RttParams;)Z", 1099 (void*) android_net_wifi_requestRange}, 1100 { "cancelRangeRequestNative", "(II[Landroid/net/wifi/RttManager$RttParams;)Z", 1101 (void*) android_net_wifi_cancelRange}, 1102 { "setScanningMacOuiNative", "(I[B)Z", (void*) android_net_wifi_setScanningMacOui}, 1103 { "getChannelsForBandNative", "(II)[I", (void*) android_net_wifi_getValidChannels} 1104 }; 1105 1106 int register_android_net_wifi_WifiNative(JNIEnv* env) { 1107 return AndroidRuntime::registerNativeMethods(env, 1108 "com/android/server/wifi/WifiNative", gWifiMethods, NELEM(gWifiMethods)); 1109 } 1110 1111 1112 /* User to register native functions */ 1113 extern "C" 1114 jint Java_com_android_server_wifi_WifiNative_registerNatives(JNIEnv* env, jclass clazz) { 1115 return AndroidRuntime::registerNativeMethods(env, 1116 "com/android/server/wifi/WifiNative", gWifiMethods, NELEM(gWifiMethods)); 1117 } 1118 1119 }; // namespace android 1120