C++ (Cpp) wifi_set_significant_change_handler Examples

Example #1

File: halutil.cpp Project: AOSP-JF/platform_frameworks_opt_net_wifi

static int SelectSignificantAPsFromScanResults() {
    wifi_scan_result results[256];
    memset(results, 0, sizeof(wifi_scan_result) * 256);
    printMsg("Retrieving scan results for significant wifi change setting\n");
    int num_results = 256;
    int result = wifi_get_cached_gscan_results(wlan0Handle, 1, num_results, results, &num_results);
    if (result < 0) {
        printMsg("failed to fetch scan results : %d\n", result);
        return WIFI_ERROR_UNKNOWN;
    } else {
        printMsg("fetched %d scan results\n", num_results);
    }

    for (int i = 0; i < num_results; i++) {
        printScanResult(results[i]);
    }

    wifi_significant_change_params params;
    memset(&params, 0, sizeof(params));

    params.rssi_sample_size = swctest_rssi_sample_size;
    params.lost_ap_sample_size = swctest_rssi_lost_ap;
    params.min_breaching = swctest_rssi_min_breaching;

    for (int i = 0; i < stest_max_ap; i++) {
        memcpy(params.ap[i].bssid, results[i].bssid, sizeof(mac_addr));
        params.ap[i].low  = results[i].rssi - swctest_rssi_ch_threshold;
        params.ap[i].high = results[i].rssi + swctest_rssi_ch_threshold;
    }
    params.num_ap = stest_max_ap;

    printMsg("Settting Significant change params rssi_sample_size#%d lost_ap_sample_size#%d"
        " and min_breaching#%d\n", params.rssi_sample_size,
        params.lost_ap_sample_size , params.min_breaching);
    printMsg("BSSID\t\t\tHIGH\tLOW\n");
    for (int i = 0; i < params.num_ap; i++) {
        mac_addr &addr = params.ap[i].bssid;
        printMsg("%02x:%02x:%02x:%02x:%02x:%02x\t%d\t%d\n", addr[0],
                addr[1], addr[2], addr[3], addr[4], addr[5],
                params.ap[i].high, params.ap[i].low);
    }
    wifi_significant_change_handler handler;
    memset(&handler, 0, sizeof(handler));
    handler.on_significant_change = &onSignificantWifiChange;

    int id = getNewCmdId();
    return wifi_set_significant_change_handler(id, wlan0Handle, params, handler);

}

Example #2

File: com_android_server_wifi_WifiNative.cpp Project: XperiaZProject/frameworks_opt_net_wifi

static jboolean android_net_wifi_trackSignificantWifiChange(
        JNIEnv *env, jclass cls, jint iface, jint id, jobject settings)  {

    wifi_interface_handle handle = getIfaceHandle(env, cls, iface);
    ALOGD("tracking significant wifi change on interface[%d] = %p", iface, handle);

    wifi_significant_change_params params;
    memset(&params, 0, sizeof(params));

    params.rssi_sample_size = getIntField(env, settings, "rssiSampleSize");
    params.lost_ap_sample_size = getIntField(env, settings, "lostApSampleSize");
    params.min_breaching = getIntField(env, settings, "minApsBreachingThreshold");

    const char *bssid_info_array_type = "[Landroid/net/wifi/WifiScanner$BssidInfo;";
    jobjectArray bssids = (jobjectArray)getObjectField(
                env, settings, "bssidInfos", bssid_info_array_type);
    params.num_ap = env->GetArrayLength(bssids);

    if (params.num_ap == 0) {
        ALOGE("Error in accessing array");
        return false;
    }

    ALOGD("Initialized common fields %d, %d, %d, %d", params.rssi_sample_size,
            params.lost_ap_sample_size, params.min_breaching, params.num_ap);

    for (int i = 0; i < params.num_ap; i++) {
        jobject objAp = env->GetObjectArrayElement(bssids, i);

        jstring macAddrString = (jstring) getObjectField(
                env, objAp, "bssid", "Ljava/lang/String;");
        if (macAddrString == NULL) {
            ALOGE("Error getting bssid field");
            return false;
        }

        ScopedUtfChars bssid(env, macAddrString);
        if (bssid.c_str() == NULL) {
            ALOGE("Error getting bssid");
            return false;
        }

        mac_addr addr;
        parseMacAddress(bssid.c_str(), addr);
        memcpy(params.ap[i].bssid, addr, sizeof(mac_addr));

        char bssidOut[32];
        sprintf(bssidOut, "%02x:%02x:%02x:%02x:%02x:%02x", addr[0], addr[1],
            addr[2], addr[3], addr[4], addr[5]);

        params.ap[i].low = getIntField(env, objAp, "low");
        params.ap[i].high = getIntField(env, objAp, "high");

        ALOGD("Added bssid %s, [%04d, %04d]", bssidOut, params.ap[i].low, params.ap[i].high);
    }

    ALOGD("Added %d bssids", params.num_ap);

    wifi_significant_change_handler handler;
    memset(&handler, 0, sizeof(handler));

    handler.on_significant_change = &onSignificantWifiChange;
    return wifi_set_significant_change_handler(id, handle, params, handler) == WIFI_SUCCESS;
}