com_android_server_wifi_WifiNative.cpp revision f1daf9342b66bf134d13fa0a42e929a008f1ca62
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 34namespace android { 35 36static jint DBG = false; 37 38static 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 63static 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 71static 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. 80static 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 88static jboolean android_net_wifi_isDriverLoaded(JNIEnv* env, jobject) 89{ 90 return (::is_wifi_driver_loaded() == 1); 91} 92 93static jboolean android_net_wifi_loadDriver(JNIEnv* env, jobject) 94{ 95 return (::wifi_load_driver() == 0); 96} 97 98static jboolean android_net_wifi_unloadDriver(JNIEnv* env, jobject) 99{ 100 return (::wifi_unload_driver() == 0); 101} 102 103static jboolean android_net_wifi_startSupplicant(JNIEnv* env, jobject, jboolean p2pSupported) 104{ 105 return (::wifi_start_supplicant(p2pSupported) == 0); 106} 107 108static jboolean android_net_wifi_killSupplicant(JNIEnv* env, jobject, jboolean p2pSupported) 109{ 110 return (::wifi_stop_supplicant(p2pSupported) == 0); 111} 112 113static jboolean android_net_wifi_connectToSupplicant(JNIEnv* env, jobject) 114{ 115 return (::wifi_connect_to_supplicant() == 0); 116} 117 118static void android_net_wifi_closeSupplicantConnection(JNIEnv* env, jobject) 119{ 120 ::wifi_close_supplicant_connection(); 121} 122 123static 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 134static jboolean android_net_wifi_doBooleanCommand(JNIEnv* env, jobject, jstring javaCommand) { 135 return doBooleanCommand(env, javaCommand); 136} 137 138static jint android_net_wifi_doIntCommand(JNIEnv* env, jobject, jstring javaCommand) { 139 return doIntCommand(env, javaCommand); 140} 141 142static jstring android_net_wifi_doStringCommand(JNIEnv* env, jobject, jstring javaCommand) { 143 return doStringCommand(env,javaCommand); 144} 145 146/* wifi_hal <==> WifiNative bridge */ 147 148static jobject mObj; /* saved WifiNative object */ 149static JavaVM *mVM; /* saved JVM pointer */ 150 151static const char *WifiHandleVarName = "mWifiHalHandle"; 152static const char *WifiIfaceHandleVarName = "mWifiIfaceHandles"; 153static jmethodID OnScanResultsMethodID; 154 155static JNIEnv *getEnv() { 156 JNIEnv *env = NULL; 157 mVM->AttachCurrentThread(&env, NULL); 158 return env; 159} 160 161static wifi_handle getWifiHandle(JNIEnv *env, jobject obj) { 162 return (wifi_handle) getLongField(env, obj, WifiHandleVarName); 163} 164 165static wifi_interface_handle getIfaceHandle(JNIEnv *env, jobject obj, jint index) { 166 return (wifi_interface_handle) getLongArrayField(env, obj, WifiIfaceHandleVarName, index); 167} 168 169static 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 195static jboolean android_net_wifi_startHal(JNIEnv* env, jobject obj) { 196 ALOGD("In wifi start Hal"); 197 wifi_handle halHandle = getWifiHandle(env, obj); 198 if (halHandle == NULL) { 199 wifi_error res = wifi_initialize(&halHandle); 200 if (res == WIFI_SUCCESS) { 201 setLongField(env, obj, WifiHandleVarName, (jlong)halHandle); 202 } 203 env->GetJavaVM(&mVM); 204 mObj = env->NewGlobalRef(obj); 205 ALOGD("halHandle = %p, mVM = %p, mObj = %p", halHandle, mVM, mObj); 206 return res == WIFI_SUCCESS; 207 } else { 208 return true; 209 } 210} 211 212void android_net_wifi_hal_cleaned_up_handler(wifi_handle handle) { 213 ALOGD("In wifi cleaned up handler"); 214 215 JNIEnv * env = getEnv(); 216 setLongField(env, mObj, WifiHandleVarName, 0); 217 env->DeleteGlobalRef(mObj); 218 mObj = NULL; 219 mVM = NULL; 220} 221 222static void android_net_wifi_stopHal(JNIEnv* env, jobject obj) { 223 ALOGD("In wifi stop Hal"); 224 wifi_handle halHandle = getWifiHandle(env, obj); 225 wifi_cleanup(halHandle, android_net_wifi_hal_cleaned_up_handler); 226} 227 228static void android_net_wifi_waitForHalEvents(JNIEnv* env, jobject obj) { 229 230 ALOGD("waitForHalEvents called, vm = %p, obj = %p, env = %p", mVM, mObj, env); 231 232 wifi_handle halHandle = getWifiHandle(env, obj); 233 ALOGD("halHandle = %p", halHandle); 234 wifi_event_loop(halHandle); 235} 236 237static int android_net_wifi_getInterfaces(JNIEnv *env, jobject obj) { 238 int n = 0; 239 wifi_handle halHandle = getWifiHandle(env, obj); 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 jlongArray array = (env)->NewLongArray(n); 247 if (array == NULL) { 248 THROW(env, "Error in accessing array"); 249 return 0; 250 } 251 252 jlong elems[8]; 253 if (n > 8) { 254 THROW(env, "Too many interfaces"); 255 return 0; 256 } 257 258 for (int i = 0; i < n; i++) { 259 elems[i] = reinterpret_cast<jlong>(ifaceHandles[i]); 260 } 261 262 env->SetLongArrayRegion(array, 0, n, elems); 263 264 setLongArrayField(env, obj, WifiIfaceHandleVarName, array); 265 return (result < 0) ? result : n; 266} 267 268static jstring android_net_wifi_getInterfaceName(JNIEnv *env, jobject obj, jint i) { 269 char buf[EVENT_BUF_SIZE]; 270 271 jlong value = getLongArrayField(env, obj, WifiIfaceHandleVarName, i); 272 wifi_interface_handle handle = (wifi_interface_handle) value; 273 int result = ::wifi_get_iface_name(handle, buf, sizeof(buf)); 274 if (result < 0) { 275 return NULL; 276 } else { 277 return env->NewStringUTF(buf); 278 } 279} 280 281static void onScanResultsAvailable(wifi_request_id id, unsigned num_results) { 282 283 JNIEnv *env = NULL; 284 mVM->AttachCurrentThread(&env, NULL); 285 286 ALOGD("onScanResultsAvailable called, vm = %p, obj = %p, env = %p", mVM, mObj, env); 287 288 reportEvent(env, mObj, "onScanResultsAvailable", "(I)V", id); 289} 290 291static void onFullScanResult(wifi_request_id id, wifi_scan_result *result) { 292 293 JNIEnv *env = NULL; 294 mVM->AttachCurrentThread(&env, NULL); 295 296 ALOGD("onFullScanResult called, vm = %p, obj = %p, env = %p", mVM, mObj, env); 297 298 jobject scanResult = createScanResult(env, *result); 299 300 ALOGD("Creating a byte array of length %d", result->ie_length); 301 302 jbyteArray elements = env->NewByteArray(result->ie_length); 303 if (elements == NULL) { 304 ALOGE("Error in allocating array"); 305 return; 306 } 307 308 ALOGE("Setting byte array"); 309 310 jbyte *bytes = (jbyte *)&(result->ie_data[0]); 311 env->SetByteArrayRegion(elements, 0, result->ie_length, bytes); 312 313 ALOGE("Returning result"); 314 315 reportEvent(env, mObj, "onFullScanResult", "(ILandroid/net/wifi/ScanResult;[B)V", id, 316 scanResult, elements); 317} 318 319static jboolean android_net_wifi_startScan( 320 JNIEnv *env, jobject obj, jint iface, jint id, jobject settings) { 321 322 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 323 ALOGD("starting scan on interface[%d] = %p", iface, handle); 324 325 wifi_scan_cmd_params params; 326 memset(¶ms, 0, sizeof(params)); 327 328 params.base_period = getIntField(env, settings, "base_period_ms"); 329 params.max_ap_per_scan = getIntField(env, settings, "max_ap_per_scan"); 330 params.report_threshold = getIntField(env, settings, "report_threshold"); 331 332 ALOGD("Initialized common fields %d, %d, %d", params.base_period, 333 params.max_ap_per_scan, params.report_threshold); 334 335 const char *bucket_array_type = "[Lcom/android/server/wifi/WifiNative$BucketSettings;"; 336 const char *channel_array_type = "[Lcom/android/server/wifi/WifiNative$ChannelSettings;"; 337 338 jobjectArray buckets = (jobjectArray)getObjectField(env, settings, "buckets", bucket_array_type); 339 params.num_buckets = getIntField(env, settings, "num_buckets"); 340 341 ALOGD("Initialized num_buckets to %d", params.num_buckets); 342 343 for (int i = 0; i < params.num_buckets; i++) { 344 jobject bucket = getObjectArrayField(env, settings, "buckets", bucket_array_type, i); 345 346 params.buckets[i].bucket = getIntField(env, bucket, "bucket"); 347 params.buckets[i].band = (wifi_band) getIntField(env, bucket, "band"); 348 params.buckets[i].period = getIntField(env, bucket, "period_ms"); 349 350 ALOGD("Initialized common bucket fields %d:%d:%d", params.buckets[i].bucket, 351 params.buckets[i].band, params.buckets[i].period); 352 353 int report_events = getIntField(env, bucket, "report_events"); 354 params.buckets[i].report_events = report_events; 355 356 ALOGD("Initialized report events to %d", params.buckets[i].report_events); 357 358 jobjectArray channels = (jobjectArray)getObjectField( 359 env, bucket, "channels", channel_array_type); 360 361 params.buckets[i].num_channels = getIntField(env, bucket, "num_channels"); 362 ALOGD("Initialized num_channels to %d", params.buckets[i].num_channels); 363 364 for (int j = 0; j < params.buckets[i].num_channels; j++) { 365 jobject channel = getObjectArrayField(env, bucket, "channels", channel_array_type, j); 366 367 params.buckets[i].channels[j].channel = getIntField(env, channel, "frequency"); 368 params.buckets[i].channels[j].dwellTimeMs = getIntField(env, channel, "dwell_time_ms"); 369 370 bool passive = getBoolField(env, channel, "passive"); 371 params.buckets[i].channels[j].passive = (passive ? 1 : 0); 372 373 ALOGD("Initialized channel %d", params.buckets[i].channels[j].channel); 374 } 375 } 376 377 ALOGD("Initialized all fields"); 378 379 wifi_scan_result_handler handler; 380 memset(&handler, 0, sizeof(handler)); 381 handler.on_scan_results_available = &onScanResultsAvailable; 382 handler.on_full_scan_result = &onFullScanResult; 383 384 return wifi_start_gscan(id, handle, params, handler) == WIFI_SUCCESS; 385} 386 387static jboolean android_net_wifi_stopScan(JNIEnv *env, jobject obj, jint iface, jint id) { 388 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 389 ALOGD("stopping scan on interface[%d] = %p", iface, handle); 390 391 return wifi_stop_gscan(id, handle) == WIFI_SUCCESS; 392} 393 394static jobject android_net_wifi_getScanResults( 395 JNIEnv *env, jobject obj, jint iface, jboolean flush) { 396 397 wifi_scan_result results[256]; 398 int num_results = 256; 399 400 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 401 ALOGD("getting scan results on interface[%d] = %p", iface, handle); 402 403 int result = wifi_get_cached_gscan_results(handle, 1, results, &num_results); 404 if (result == WIFI_SUCCESS) { 405 jclass clsScanResult = (env)->FindClass("android/net/wifi/ScanResult"); 406 if (clsScanResult == NULL) { 407 ALOGE("Error in accessing class"); 408 return NULL; 409 } 410 411 jobjectArray scanResults = env->NewObjectArray(num_results, clsScanResult, NULL); 412 if (scanResults == NULL) { 413 ALOGE("Error in allocating array"); 414 return NULL; 415 } 416 417 for (int i = 0; i < num_results; i++) { 418 419 jobject scanResult = createObject(env, "android/net/wifi/ScanResult"); 420 if (scanResult == NULL) { 421 ALOGE("Error in creating scan result"); 422 return NULL; 423 } 424 425 setStringField(env, scanResult, "SSID", results[i].ssid); 426 427 char bssid[32]; 428 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", results[i].bssid[0], 429 results[i].bssid[1], results[i].bssid[2], results[i].bssid[3], 430 results[i].bssid[4], results[i].bssid[5]); 431 432 setStringField(env, scanResult, "BSSID", bssid); 433 434 setIntField(env, scanResult, "level", results[i].rssi); 435 setIntField(env, scanResult, "frequency", results[i].channel); 436 setLongField(env, scanResult, "timestamp", results[i].ts); 437 438 env->SetObjectArrayElement(scanResults, i, scanResult); 439 env->DeleteLocalRef(scanResult); 440 } 441 442 return scanResults; 443 } else { 444 return NULL; 445 } 446} 447 448 449static jboolean android_net_wifi_getScanCapabilities( 450 JNIEnv *env, jobject obj, jint iface, jobject capabilities) { 451 452 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 453 ALOGD("getting scan capabilities on interface[%d] = %p", iface, handle); 454 455 wifi_gscan_capabilities c; 456 memset(&c, 0, sizeof(c)); 457 int result = wifi_get_gscan_capabilities(handle, &c); 458 if (result != WIFI_SUCCESS) { 459 ALOGD("failed to get capabilities : %d", result); 460 return JNI_FALSE; 461 } 462 463 setIntField(env, capabilities, "max_scan_cache_size", c.max_scan_cache_size); 464 setIntField(env, capabilities, "max_scan_buckets", c.max_scan_buckets); 465 setIntField(env, capabilities, "max_ap_cache_per_scan", c.max_ap_cache_per_scan); 466 setIntField(env, capabilities, "max_rssi_sample_size", c.max_rssi_sample_size); 467 setIntField(env, capabilities, "max_scan_reporting_threshold", c.max_scan_reporting_threshold); 468 setIntField(env, capabilities, "max_hotlist_aps", c.max_hotlist_aps); 469 setIntField(env, capabilities, "max_significant_wifi_change_aps", 470 c.max_significant_wifi_change_aps); 471 472 return JNI_TRUE; 473} 474 475 476static byte parseHexChar(char ch) { 477 if (isdigit(ch)) 478 return ch - '0'; 479 else if ('A' <= ch && ch <= 'F') 480 return ch - 'A' + 10; 481 else if ('a' <= ch && ch <= 'f') 482 return ch - 'a' + 10; 483 else { 484 ALOGE("invalid character in bssid %c", ch); 485 return 0; 486 } 487} 488 489static byte parseHexByte(const char * &str) { 490 byte b = parseHexChar(str[0]); 491 if (str[1] == ':' || str[1] == '\0') { 492 str += 2; 493 return b; 494 } else { 495 b = b << 4 | parseHexChar(str[1]); 496 str += 3; 497 return b; 498 } 499} 500 501static void parseMacAddress(const char *str, mac_addr addr) { 502 addr[0] = parseHexByte(str); 503 addr[1] = parseHexByte(str); 504 addr[2] = parseHexByte(str); 505 addr[3] = parseHexByte(str); 506 addr[4] = parseHexByte(str); 507 addr[5] = parseHexByte(str); 508} 509 510static void onHotlistApFound(wifi_request_id id, 511 unsigned num_results, wifi_scan_result *results) { 512 513 JNIEnv *env = NULL; 514 mVM->AttachCurrentThread(&env, NULL); 515 516 ALOGD("onHotlistApFound called, vm = %p, obj = %p, env = %p, num_results = %d", 517 mVM, mObj, env, num_results); 518 519 jclass clsScanResult = (env)->FindClass("android/net/wifi/ScanResult"); 520 if (clsScanResult == NULL) { 521 ALOGE("Error in accessing class"); 522 return; 523 } 524 525 jobjectArray scanResults = env->NewObjectArray(num_results, clsScanResult, NULL); 526 if (scanResults == NULL) { 527 ALOGE("Error in allocating array"); 528 return; 529 } 530 531 for (unsigned i = 0; i < num_results; i++) { 532 533 jobject scanResult = createObject(env, "android/net/wifi/ScanResult"); 534 if (scanResult == NULL) { 535 ALOGE("Error in creating scan result"); 536 return; 537 } 538 539 setStringField(env, scanResult, "SSID", results[i].ssid); 540 541 char bssid[32]; 542 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", results[i].bssid[0], results[i].bssid[1], 543 results[i].bssid[2], results[i].bssid[3], results[i].bssid[4], results[i].bssid[5]); 544 545 setStringField(env, scanResult, "BSSID", bssid); 546 547 setIntField(env, scanResult, "level", results[i].rssi); 548 setIntField(env, scanResult, "frequency", results[i].channel); 549 setLongField(env, scanResult, "timestamp", results[i].ts); 550 551 env->SetObjectArrayElement(scanResults, i, scanResult); 552 553 ALOGD("Found AP %32s %s", results[i].ssid, bssid); 554 } 555 556 reportEvent(env, mObj, "onHotlistApFound", "(I[Landroid/net/wifi/ScanResult;)V", 557 id, scanResults); 558} 559 560static jboolean android_net_wifi_setHotlist( 561 JNIEnv *env, jobject obj, jint iface, jint id, jobject ap) { 562 563 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 564 ALOGD("setting hotlist on interface[%d] = %p", iface, handle); 565 566 wifi_bssid_hotlist_params params; 567 memset(¶ms, 0, sizeof(params)); 568 569 jobjectArray array = (jobjectArray) getObjectField(env, ap, 570 "hotspotInfos", "[Landroid/net/wifi/WifiScanner$HotspotInfo;"); 571 params.num = env->GetArrayLength(array); 572 573 if (params.num == 0) { 574 ALOGE("Error in accesing array"); 575 return false; 576 } 577 578 for (int i = 0; i < params.num; i++) { 579 jobject objAp = env->GetObjectArrayElement(array, i); 580 581 jstring macAddrString = (jstring) getObjectField( 582 env, objAp, "bssid", "Ljava/lang/String;"); 583 if (macAddrString == NULL) { 584 ALOGE("Error getting bssid field"); 585 return false; 586 } 587 588 const char *bssid = env->GetStringUTFChars(macAddrString, NULL); 589 if (bssid == NULL) { 590 ALOGE("Error getting bssid"); 591 return false; 592 } 593 parseMacAddress(bssid, params.bssids[i].bssid); 594 595 mac_addr addr; 596 memcpy(addr, params.bssids[i].bssid, sizeof(mac_addr)); 597 598 char bssidOut[32]; 599 sprintf(bssidOut, "%0x:%0x:%0x:%0x:%0x:%0x", addr[0], addr[1], 600 addr[2], addr[3], addr[4], addr[5]); 601 602 ALOGD("Added bssid %s", bssidOut); 603 604 params.bssids[i].low = getIntField(env, objAp, "low"); 605 params.bssids[i].high = getIntField(env, objAp, "high"); 606 } 607 608 wifi_hotlist_ap_found_handler handler; 609 memset(&handler, 0, sizeof(handler)); 610 611 handler.on_hotlist_ap_found = &onHotlistApFound; 612 return wifi_set_bssid_hotlist(id, handle, params, handler) == WIFI_SUCCESS; 613} 614 615static jboolean android_net_wifi_resetHotlist( 616 JNIEnv *env, jobject obj, jint iface, jint id) { 617 618 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 619 ALOGD("resetting hotlist on interface[%d] = %p", iface, handle); 620 621 return wifi_reset_bssid_hotlist(id, handle) == WIFI_SUCCESS; 622} 623 624void onSignificantWifiChange(wifi_request_id id, unsigned num_results, wifi_scan_result *results) { 625 JNIEnv *env = NULL; 626 mVM->AttachCurrentThread(&env, NULL); 627 628 ALOGD("onSignificantWifiChange called, vm = %p, obj = %p, env = %p", mVM, mObj, env); 629 630 jclass clsScanResult = (env)->FindClass("android/net/wifi/ScanResult"); 631 if (clsScanResult == NULL) { 632 ALOGE("Error in accessing class"); 633 return; 634 } 635 636 jobjectArray scanResults = env->NewObjectArray(num_results, clsScanResult, NULL); 637 if (scanResults == NULL) { 638 ALOGE("Error in allocating array"); 639 return; 640 } 641 642 for (unsigned i = 0; i < num_results; i++) { 643 644 jobject scanResult = createObject(env, "android/net/wifi/ScanResult"); 645 if (scanResult == NULL) { 646 ALOGE("Error in creating scan result"); 647 return; 648 } 649 650 setStringField(env, scanResult, "SSID", results[i].ssid); 651 652 char bssid[32]; 653 sprintf(bssid, "%02x:%02x:%02x:%02x:%02x:%02x", results[i].bssid[0], results[i].bssid[1], 654 results[i].bssid[2], results[i].bssid[3], results[i].bssid[4], results[i].bssid[5]); 655 656 setStringField(env, scanResult, "BSSID", bssid); 657 658 setIntField(env, scanResult, "level", results[i].rssi); 659 setIntField(env, scanResult, "frequency", results[i].channel); 660 setLongField(env, scanResult, "timestamp", results[i].ts); 661 662 env->SetObjectArrayElement(scanResults, i, scanResult); 663 } 664 665 reportEvent(env, mObj, "onSignificantWifiChange", "(I[Landroid/net/wifi/ScanResult;)V", 666 id, scanResults); 667 668} 669 670static jboolean android_net_wifi_trackSignificantWifiChange( 671 JNIEnv *env, jobject obj, jint iface, jint id, jobject settings) { 672 673 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 674 ALOGD("tracking significant wifi change on interface[%d] = %p", iface, handle); 675 676 wifi_significant_change_params params; 677 memset(¶ms, 0, sizeof(params)); 678 679 params.rssi_sample_size = getIntField(env, settings, "rssiSampleSize"); 680 params.lost_ap_sample_size = getIntField(env, settings, "lostApSampleSize"); 681 params.min_breaching = getIntField(env, settings, "minApsBreachingThreshold"); 682 683 const char *hotspot_info_array_type = "[Landroid/net/wifi/WifiScanner$HotspotInfo;"; 684 jobjectArray hotspots = (jobjectArray)getObjectField( 685 env, settings, "hotspotInfos", hotspot_info_array_type); 686 params.num = env->GetArrayLength(hotspots); 687 688 if (params.num == 0) { 689 ALOGE("Error in accesing array"); 690 return false; 691 } 692 693 ALOGD("Initialized common fields %d, %d, %d, %d", params.rssi_sample_size, 694 params.lost_ap_sample_size, params.min_breaching, params.num); 695 696 for (int i = 0; i < params.num; i++) { 697 jobject objAp = env->GetObjectArrayElement(hotspots, i); 698 699 jstring macAddrString = (jstring) getObjectField( 700 env, objAp, "bssid", "Ljava/lang/String;"); 701 if (macAddrString == NULL) { 702 ALOGE("Error getting bssid field"); 703 return false; 704 } 705 706 const char *bssid = env->GetStringUTFChars(macAddrString, NULL); 707 if (bssid == NULL) { 708 ALOGE("Error getting bssid"); 709 return false; 710 } 711 712 mac_addr addr; 713 parseMacAddress(bssid, addr); 714 memcpy(params.bssids[i].bssid, addr, sizeof(mac_addr)); 715 716 char bssidOut[32]; 717 sprintf(bssidOut, "%0x:%0x:%0x:%0x:%0x:%0x", addr[0], addr[1], 718 addr[2], addr[3], addr[4], addr[5]); 719 720 params.bssids[i].low = getIntField(env, objAp, "low"); 721 params.bssids[i].high = getIntField(env, objAp, "high"); 722 723 ALOGD("Added bssid %s, [%04d, %04d]", bssidOut, params.bssids[i].low, params.bssids[i].high); 724 } 725 726 ALOGD("Added %d bssids", params.num); 727 728 wifi_significant_change_handler handler; 729 memset(&handler, 0, sizeof(handler)); 730 731 handler.on_significant_change = &onSignificantWifiChange; 732 return wifi_set_significant_change_handler(id, handle, params, handler) == WIFI_SUCCESS; 733} 734 735static jboolean android_net_wifi_untrackSignificantWifiChange( 736 JNIEnv *env, jobject obj, jint iface, jint id) { 737 738 wifi_interface_handle handle = getIfaceHandle(env, obj, iface); 739 ALOGD("resetting significant wifi change on interface[%d] = %p", iface, handle); 740 741 return wifi_reset_significant_change_handler(id, handle) == WIFI_SUCCESS; 742} 743 744 745// ---------------------------------------------------------------------------- 746 747/* 748 * JNI registration. 749 */ 750static JNINativeMethod gWifiMethods[] = { 751 /* name, signature, funcPtr */ 752 753 { "loadDriver", "()Z", (void *)android_net_wifi_loadDriver }, 754 { "isDriverLoaded", "()Z", (void *)android_net_wifi_isDriverLoaded }, 755 { "unloadDriver", "()Z", (void *)android_net_wifi_unloadDriver }, 756 { "startSupplicant", "(Z)Z", (void *)android_net_wifi_startSupplicant }, 757 { "killSupplicant", "(Z)Z", (void *)android_net_wifi_killSupplicant }, 758 { "connectToSupplicantNative", "()Z", (void *)android_net_wifi_connectToSupplicant }, 759 { "closeSupplicantConnectionNative", "()V", 760 (void *)android_net_wifi_closeSupplicantConnection }, 761 { "waitForEventNative", "()Ljava/lang/String;", (void*)android_net_wifi_waitForEvent }, 762 { "doBooleanCommandNative", "(Ljava/lang/String;)Z", (void*)android_net_wifi_doBooleanCommand }, 763 { "doIntCommandNative", "(Ljava/lang/String;)I", (void*)android_net_wifi_doIntCommand }, 764 { "doStringCommandNative", "(Ljava/lang/String;)Ljava/lang/String;", 765 (void*) android_net_wifi_doStringCommand }, 766 { "startHalNative", "()Z", (void*) android_net_wifi_startHal }, 767 { "stopHalNative", "()V", (void*) android_net_wifi_stopHal }, 768 { "waitForHalEventNative", "()V", (void*) android_net_wifi_waitForHalEvents }, 769 { "getInterfacesNative", "()I", (void*) android_net_wifi_getInterfaces}, 770 { "getInterfaceNameNative", "(I)Ljava/lang/String;", (void*) android_net_wifi_getInterfaceName}, 771 { "getScanCapabilitiesNative", "(ILcom/android/server/wifi/WifiNative$ScanCapabilities;)Z", 772 (void *) android_net_wifi_getScanCapabilities}, 773 { "startScanNative", "(IILcom/android/server/wifi/WifiNative$ScanSettings;)Z", 774 (void*) android_net_wifi_startScan}, 775 { "stopScanNative", "(II)Z", (void*) android_net_wifi_stopScan}, 776 { "getScanResultsNative", "(IZ)[Landroid/net/wifi/ScanResult;", 777 (void *) android_net_wifi_getScanResults}, 778 779 { "setHotlistNative", "(IILandroid/net/wifi/WifiScanner$HotlistSettings;)Z", 780 (void*) android_net_wifi_setHotlist}, 781 { "resetHotlistNative", "(II)Z", (void*) android_net_wifi_resetHotlist}, 782 783 784 { "trackSignificantWifiChangeNative", "(IILandroid/net/wifi/WifiScanner$WifiChangeSettings;)Z", 785 (void*) android_net_wifi_trackSignificantWifiChange}, 786 { "untrackSignificantWifiChangeNative", "(II)Z", 787 (void*) android_net_wifi_untrackSignificantWifiChange} 788}; 789 790int register_android_net_wifi_WifiNative(JNIEnv* env) { 791 return AndroidRuntime::registerNativeMethods(env, 792 "com/android/server/wifi/WifiNative", gWifiMethods, NELEM(gWifiMethods)); 793} 794 795 796/* User to register native functions */ 797extern "C" 798jint Java_com_android_server_wifi_WifiNative_registerNatives(JNIEnv* env, jclass clazz) { 799 return AndroidRuntime::registerNativeMethods(env, 800 "com/android/server/wifi/WifiNative", gWifiMethods, NELEM(gWifiMethods)); 801} 802 803}; // namespace android 804