static jboolean android_net_wifi_getScanCapabilities(
JNIEnv *env, jclass cls, jint iface, jobject capabilities) {
wifi_interface_handle handle = getIfaceHandle(env, cls, iface);
ALOGD("getting scan capabilities on interface[%d] = %p", iface, handle);
wifi_gscan_capabilities c;
memset(&c, 0, sizeof(c));
int result = wifi_get_gscan_capabilities(handle, &c);
if (result != WIFI_SUCCESS) {
ALOGD("failed to get capabilities : %d", result);
return JNI_FALSE;
}
setIntField(env, capabilities, "max_scan_cache_size", c.max_scan_cache_size);
setIntField(env, capabilities, "max_scan_buckets", c.max_scan_buckets);
setIntField(env, capabilities, "max_ap_cache_per_scan", c.max_ap_cache_per_scan);
setIntField(env, capabilities, "max_rssi_sample_size", c.max_rssi_sample_size);
setIntField(env, capabilities, "max_scan_reporting_threshold", c.max_scan_reporting_threshold);
setIntField(env, capabilities, "max_hotlist_aps", c.max_hotlist_aps);
setIntField(env, capabilities, "max_significant_wifi_change_aps",
c.max_significant_wifi_change_aps);
return JNI_TRUE;
}
static bool startScan( void (*pfnOnResultsAvailable)(wifi_request_id, unsigned),
int max_ap_per_scan, int base_period, int report_threshold) {
/* Get capabilties */
wifi_gscan_capabilities capabilities;
int result = wifi_get_gscan_capabilities(wlan0Handle, &capabilities);
if (result < 0) {
printMsg("failed to get scan capabilities - %d\n", result);
printMsg("trying scan anyway ..\n");
} else {
printScanCapabilities(capabilities);
}
wifi_scan_cmd_params params;
memset(¶ms, 0, sizeof(params));
if(num_channels > 0){
params.max_ap_per_scan = max_ap_per_scan;
params.base_period = base_period; // 5 second by default
params.report_threshold = report_threshold;
params.num_buckets = 1;
params.buckets[0].bucket = 0;
params.buckets[0].band = WIFI_BAND_UNSPECIFIED;
params.buckets[0].period = base_period;
params.buckets[0].num_channels = num_channels;
for(int i = 0; i < num_channels; i++){
params.buckets[0].channels[i].channel = channel_list[i];
}
} else {
/* create a schedule to scan channels 1, 6, 11 every 5 second and
* scan 36, 40, 44, 149, 153, 157, 161 165 every 10 second */
params.max_ap_per_scan = max_ap_per_scan;
params.base_period = base_period; // 5 second
params.report_threshold = report_threshold;
params.num_buckets = 3;
params.buckets[0].bucket = 0;
params.buckets[0].band = WIFI_BAND_UNSPECIFIED;
params.buckets[0].period = 5000; // 5 second
params.buckets[0].report_events = 0;
params.buckets[0].num_channels = 2;
params.buckets[0].channels[0].channel = 2412;
params.buckets[0].channels[1].channel = 2437;
params.buckets[1].bucket = 1;
params.buckets[1].band = WIFI_BAND_A;
params.buckets[1].period = 10000; // 10 second
params.buckets[1].report_events = 1;
params.buckets[1].num_channels = 8; // driver should ignore list since band is specified
params.buckets[1].channels[0].channel = 5180;
params.buckets[1].channels[1].channel = 5200;
params.buckets[1].channels[2].channel = 5220;
params.buckets[1].channels[3].channel = 5745;
params.buckets[1].channels[4].channel = 5765;
params.buckets[1].channels[5].channel = 5785;
params.buckets[1].channels[6].channel = 5805;
params.buckets[1].channels[7].channel = 5825;
params.buckets[2].bucket = 2;
params.buckets[2].band = WIFI_BAND_UNSPECIFIED;
params.buckets[2].period = 15000; // 15 second
params.buckets[2].report_events = 2;
params.buckets[2].num_channels = 1;
params.buckets[2].channels[0].channel = 2462;
}
wifi_scan_result_handler handler;
memset(&handler, 0, sizeof(handler));
handler.on_scan_results_available = pfnOnResultsAvailable;
handler.on_scan_event = on_scan_event;
scanCmdId = getNewCmdId();
printMsg("Starting scan --->\n");
return wifi_start_gscan(scanCmdId, wlan0Handle, params, handler) == WIFI_SUCCESS;
}
