| |
| #include <stdint.h> |
| #include <fcntl.h> |
| #include <sys/socket.h> |
| #include <netlink/genl/genl.h> |
| #include <netlink/genl/family.h> |
| #include <netlink/genl/ctrl.h> |
| #include <linux/rtnetlink.h> |
| #include <netpacket/packet.h> |
| #include <linux/filter.h> |
| #include <linux/errqueue.h> |
| |
| #include <linux/pkt_sched.h> |
| #include <netlink/object-api.h> |
| #include <netlink/netlink.h> |
| #include <netlink/socket.h> |
| #include <netlink/handlers.h> |
| |
| #include "sync.h" |
| |
| #define LOG_TAG "WifiHAL" |
| |
| #include <utils/Log.h> |
| |
| #include "wifi_hal.h" |
| #include "common.h" |
| #include "cpp_bindings.h" |
| |
| typedef enum { |
| |
| GSCAN_ATTRIBUTE_NUM_BUCKETS = 10, |
| GSCAN_ATTRIBUTE_BASE_PERIOD, |
| GSCAN_ATTRIBUTE_BUCKETS_BAND, |
| GSCAN_ATTRIBUTE_BUCKET_ID, |
| GSCAN_ATTRIBUTE_BUCKET_PERIOD, |
| GSCAN_ATTRIBUTE_BUCKET_NUM_CHANNELS, |
| GSCAN_ATTRIBUTE_BUCKET_CHANNELS, |
| GSCAN_ATTRIBUTE_NUM_AP_PER_SCAN, |
| GSCAN_ATTRIBUTE_REPORT_THRESHOLD, |
| GSCAN_ATTRIBUTE_NUM_SCANS_TO_CACHE, |
| GSCAN_ATTRIBUTE_BAND = GSCAN_ATTRIBUTE_BUCKETS_BAND, |
| |
| GSCAN_ATTRIBUTE_ENABLE_FEATURE = 20, |
| GSCAN_ATTRIBUTE_SCAN_RESULTS_COMPLETE, /* indicates no more results */ |
| GSCAN_ATTRIBUTE_FLUSH_FEATURE, /* Flush all the configs */ |
| GSCAN_ENABLE_FULL_SCAN_RESULTS, |
| GSCAN_ATTRIBUTE_REPORT_EVENTS, |
| |
| /* remaining reserved for additional attributes */ |
| GSCAN_ATTRIBUTE_NUM_OF_RESULTS = 30, |
| GSCAN_ATTRIBUTE_FLUSH_RESULTS, |
| GSCAN_ATTRIBUTE_SCAN_RESULTS, /* flat array of wifi_scan_result */ |
| GSCAN_ATTRIBUTE_SCAN_ID, /* indicates scan number */ |
| GSCAN_ATTRIBUTE_SCAN_FLAGS, /* indicates if scan was aborted */ |
| GSCAN_ATTRIBUTE_AP_FLAGS, /* flags on significant change event */ |
| GSCAN_ATTRIBUTE_NUM_CHANNELS, |
| GSCAN_ATTRIBUTE_CHANNEL_LIST, |
| |
| /* remaining reserved for additional attributes */ |
| |
| GSCAN_ATTRIBUTE_SSID = 40, |
| GSCAN_ATTRIBUTE_BSSID, |
| GSCAN_ATTRIBUTE_CHANNEL, |
| GSCAN_ATTRIBUTE_RSSI, |
| GSCAN_ATTRIBUTE_TIMESTAMP, |
| GSCAN_ATTRIBUTE_RTT, |
| GSCAN_ATTRIBUTE_RTTSD, |
| |
| /* remaining reserved for additional attributes */ |
| |
| GSCAN_ATTRIBUTE_HOTLIST_BSSIDS = 50, |
| GSCAN_ATTRIBUTE_RSSI_LOW, |
| GSCAN_ATTRIBUTE_RSSI_HIGH, |
| GSCAN_ATTRIBUTE_HOTLIST_ELEM, |
| GSCAN_ATTRIBUTE_HOTLIST_FLUSH, |
| |
| /* remaining reserved for additional attributes */ |
| GSCAN_ATTRIBUTE_RSSI_SAMPLE_SIZE = 60, |
| GSCAN_ATTRIBUTE_LOST_AP_SAMPLE_SIZE, |
| GSCAN_ATTRIBUTE_MIN_BREACHING, |
| GSCAN_ATTRIBUTE_SIGNIFICANT_CHANGE_BSSIDS, |
| GSCAN_ATTRIBUTE_SIGNIFICANT_CHANGE_FLUSH, |
| |
| GSCAN_ATTRIBUTE_MAX |
| |
| } GSCAN_ATTRIBUTE; |
| |
| |
| // helper methods |
| wifi_error wifi_enable_full_scan_results(wifi_request_id id, wifi_interface_handle iface, |
| wifi_scan_result_handler handler); |
| wifi_error wifi_disable_full_scan_results(wifi_request_id id, wifi_interface_handle iface); |
| |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| class GetCapabilitiesCommand : public WifiCommand |
| { |
| wifi_gscan_capabilities *mCapabilities; |
| public: |
| GetCapabilitiesCommand(wifi_interface_handle iface, wifi_gscan_capabilities *capabitlites) |
| : WifiCommand(iface, 0), mCapabilities(capabitlites) |
| { |
| memset(mCapabilities, 0, sizeof(*mCapabilities)); |
| } |
| |
| virtual int create() { |
| ALOGD("Creating message to get scan capablities; iface = %d", mIfaceInfo->id); |
| |
| int ret = mMsg.create(GOOGLE_OUI, GSCAN_SUBCMD_GET_CAPABILITIES); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| protected: |
| virtual int handleResponse(WifiEvent& reply) { |
| |
| ALOGD("In GetCapabilities::handleResponse"); |
| |
| if (reply.get_cmd() != NL80211_CMD_VENDOR) { |
| ALOGD("Ignoring reply with cmd = %d", reply.get_cmd()); |
| return NL_SKIP; |
| } |
| |
| int id = reply.get_vendor_id(); |
| int subcmd = reply.get_vendor_subcmd(); |
| |
| void *data = reply.get_vendor_data(); |
| int len = reply.get_vendor_data_len(); |
| |
| ALOGD("Id = %0x, subcmd = %d, len = %d, expected len = %d", id, subcmd, len, |
| sizeof(*mCapabilities)); |
| |
| memcpy(mCapabilities, data, min(len, (int) sizeof(*mCapabilities))); |
| |
| return NL_OK; |
| } |
| }; |
| |
| |
| wifi_error wifi_get_gscan_capabilities(wifi_interface_handle handle, |
| wifi_gscan_capabilities *capabilities) |
| { |
| GetCapabilitiesCommand command(handle, capabilities); |
| return (wifi_error) command.requestResponse(); |
| } |
| |
| class GetChannelListCommand : public WifiCommand |
| { |
| wifi_channel *channels; |
| int max_channels; |
| int *num_channels; |
| int band; |
| public: |
| GetChannelListCommand(wifi_interface_handle iface, wifi_channel *channel_buf, int *ch_num, |
| int num_max_ch, int band) |
| : WifiCommand(iface, 0), channels(channel_buf), max_channels(num_max_ch), num_channels(ch_num), |
| band(band) |
| { |
| memset(channels, 0, sizeof(wifi_channel) * max_channels); |
| } |
| virtual int create() { |
| ALOGD("Creating message to get channel list; iface = %d", mIfaceInfo->id); |
| |
| int ret = mMsg.create(GOOGLE_OUI, GSCAN_SUBCMD_GET_CHANNEL_LIST); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| nlattr *data = mMsg.attr_start(NL80211_ATTR_VENDOR_DATA); |
| ret = mMsg.put_u32(GSCAN_ATTRIBUTE_BAND, band); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| mMsg.attr_end(data); |
| |
| return ret; |
| } |
| |
| protected: |
| virtual int handleResponse(WifiEvent& reply) { |
| |
| ALOGD("In GetChannelList::handleResponse"); |
| |
| if (reply.get_cmd() != NL80211_CMD_VENDOR) { |
| ALOGD("Ignoring reply with cmd = %d", reply.get_cmd()); |
| return NL_SKIP; |
| } |
| |
| int id = reply.get_vendor_id(); |
| int subcmd = reply.get_vendor_subcmd(); |
| int num_channels_to_copy = 0; |
| |
| nlattr *vendor_data = reply.get_attribute(NL80211_ATTR_VENDOR_DATA); |
| int len = reply.get_vendor_data_len(); |
| |
| ALOGD("Id = %0x, subcmd = %d, len = %d", id, subcmd, len); |
| if (vendor_data == NULL || len == 0) { |
| ALOGE("no vendor data in GetChannelList response; ignoring it"); |
| return NL_SKIP; |
| } |
| |
| for (nl_iterator it(vendor_data); it.has_next(); it.next()) { |
| if (it.get_type() == GSCAN_ATTRIBUTE_NUM_CHANNELS) { |
| num_channels_to_copy = it.get_u32(); |
| ALOGI("Got channel list with %d channels", num_channels_to_copy); |
| if(num_channels_to_copy > max_channels) |
| num_channels_to_copy = max_channels; |
| *num_channels = num_channels_to_copy; |
| } else if (it.get_type() == GSCAN_ATTRIBUTE_CHANNEL_LIST && num_channels_to_copy) { |
| memcpy(channels, it.get_data(), sizeof(int) * num_channels_to_copy); |
| } else { |
| ALOGW("Ignoring invalid attribute type = %d, size = %d", |
| it.get_type(), it.get_len()); |
| } |
| } |
| |
| return NL_OK; |
| } |
| }; |
| |
| wifi_error wifi_get_valid_channels(wifi_interface_handle handle, |
| int band, int max_channels, wifi_channel *channels, int *num_channels) |
| { |
| GetChannelListCommand command(handle, channels, num_channels, |
| max_channels, band); |
| return (wifi_error) command.requestResponse(); |
| } |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| /* helper functions */ |
| |
| static int parseScanResults(wifi_scan_result *results, int num, nlattr *attr) |
| { |
| memset(results, 0, sizeof(wifi_scan_result) * num); |
| |
| int i = 0; |
| for (nl_iterator it(attr); it.has_next() && i < num; it.next(), i++) { |
| |
| int index = it.get_type(); |
| ALOGI("retrieved scan result %d", index); |
| nlattr *sc_data = (nlattr *) it.get_data(); |
| wifi_scan_result *result = results + i; |
| |
| for (nl_iterator it2(sc_data); it2.has_next(); it2.next()) { |
| int type = it2.get_type(); |
| if (type == GSCAN_ATTRIBUTE_SSID) { |
| strncpy(result->ssid, (char *) it2.get_data(), it2.get_len()); |
| result->ssid[it2.get_len()] = 0; |
| } else if (type == GSCAN_ATTRIBUTE_BSSID) { |
| memcpy(result->bssid, (byte *) it2.get_data(), sizeof(mac_addr)); |
| } else if (type == GSCAN_ATTRIBUTE_TIMESTAMP) { |
| result->ts = it2.get_u64(); |
| } else if (type == GSCAN_ATTRIBUTE_CHANNEL) { |
| result->ts = it2.get_u16(); |
| } else if (type == GSCAN_ATTRIBUTE_RSSI) { |
| result->rssi = it2.get_u8(); |
| } else if (type == GSCAN_ATTRIBUTE_RTT) { |
| result->rtt = it2.get_u64(); |
| } else if (type == GSCAN_ATTRIBUTE_RTTSD) { |
| result->rtt_sd = it2.get_u64(); |
| } |
| } |
| |
| } |
| |
| if (i >= num) { |
| ALOGE("Got too many results; skipping some"); |
| } |
| |
| return i; |
| } |
| |
| int createFeatureRequest(WifiRequest& request, int subcmd, int enable) { |
| |
| int result = request.create(GOOGLE_OUI, subcmd); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u32(GSCAN_ATTRIBUTE_ENABLE_FEATURE, enable); |
| if (result < 0) { |
| return result; |
| } |
| |
| request.attr_end(data); |
| return WIFI_SUCCESS; |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| class FullScanResultsCommand : public WifiCommand |
| { |
| int *mParams; |
| wifi_scan_result_handler mHandler; |
| public: |
| FullScanResultsCommand(wifi_interface_handle iface, int id, int *params, |
| wifi_scan_result_handler handler) |
| : WifiCommand(iface, id), mParams(params), mHandler(handler) |
| { } |
| |
| int createRequest(WifiRequest& request, int subcmd, int enable) { |
| int result = request.create(GOOGLE_OUI, subcmd); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u32(GSCAN_ENABLE_FULL_SCAN_RESULTS, enable); |
| if (result < 0) { |
| return result; |
| } |
| |
| request.attr_end(data); |
| return WIFI_SUCCESS; |
| |
| } |
| |
| int start() { |
| ALOGD("Enabling Full scan results"); |
| WifiRequest request(familyId(), ifaceId()); |
| int result = createRequest(request, GSCAN_SUBCMD_ENABLE_FULL_SCAN_RESULTS, 1); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to create request; result = %d", result); |
| return result; |
| } |
| |
| registerVendorHandler(GOOGLE_OUI, GSCAN_EVENT_FULL_SCAN_RESULTS); |
| |
| result = requestResponse(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to enable full scan results; result = %d", result); |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_FULL_SCAN_RESULTS); |
| return result; |
| } |
| |
| return result; |
| } |
| |
| virtual int cancel() { |
| ALOGD("Disabling Full scan results"); |
| |
| WifiRequest request(familyId(), ifaceId()); |
| int result = createRequest(request, GSCAN_SUBCMD_ENABLE_FULL_SCAN_RESULTS, 0); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to create request; result = %d", result); |
| } else { |
| result = requestResponse(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to disable full scan results;result = %d", result); |
| } |
| } |
| |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_FULL_SCAN_RESULTS); |
| return WIFI_SUCCESS; |
| } |
| |
| virtual int handleResponse(WifiEvent& reply) { |
| ALOGD("Request complete!"); |
| /* Nothing to do on response! */ |
| return NL_SKIP; |
| } |
| |
| virtual int handleEvent(WifiEvent& event) { |
| ALOGI("Full scan results: Got an event"); |
| |
| // event.log(); |
| |
| nlattr *vendor_data = event.get_attribute(NL80211_ATTR_VENDOR_DATA); |
| unsigned int len = event.get_vendor_data_len(); |
| |
| if (vendor_data == NULL || len < sizeof(wifi_scan_result)) { |
| ALOGI("No scan results found"); |
| return NL_SKIP; |
| } |
| |
| wifi_scan_result *result = (wifi_scan_result *)event.get_vendor_data(); |
| |
| if(*mHandler.on_full_scan_result) |
| (*mHandler.on_full_scan_result)(id(), result); |
| |
| ALOGI("%-32s\t", result->ssid); |
| |
| ALOGI("%02x:%02x:%02x:%02x:%02x:%02x ", result->bssid[0], result->bssid[1], |
| result->bssid[2], result->bssid[3], result->bssid[4], result->bssid[5]); |
| |
| ALOGI("%d\t", result->rssi); |
| ALOGI("%d\t", result->channel); |
| ALOGI("%lld\t", result->ts); |
| ALOGI("%lld\t", result->rtt); |
| ALOGI("%lld\n", result->rtt_sd); |
| |
| |
| return NL_SKIP; |
| } |
| |
| }; |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| class ScanCommand : public WifiCommand |
| { |
| wifi_scan_cmd_params *mParams; |
| wifi_scan_result_handler mHandler; |
| static unsigned mGlobalFullScanBuckets; |
| bool mLocalFullScanBuckets; |
| public: |
| ScanCommand(wifi_interface_handle iface, int id, wifi_scan_cmd_params *params, |
| wifi_scan_result_handler handler) |
| : WifiCommand(iface, id), mParams(params), mHandler(handler), |
| mLocalFullScanBuckets(0) |
| { } |
| |
| int createSetupRequest(WifiRequest& request) { |
| int result = request.create(GOOGLE_OUI, GSCAN_SUBCMD_SET_CONFIG); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u32(GSCAN_ATTRIBUTE_BASE_PERIOD, mParams->base_period); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = request.put_u32(GSCAN_ATTRIBUTE_NUM_BUCKETS, mParams->num_buckets); |
| if (result < 0) { |
| return result; |
| } |
| |
| for (int i = 0; i < mParams->num_buckets; i++) { |
| nlattr * bucket = request.attr_start(i); // next bucket |
| result = request.put_u32(GSCAN_ATTRIBUTE_BUCKET_ID, mParams->buckets[i].bucket); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u32(GSCAN_ATTRIBUTE_BUCKET_PERIOD, mParams->buckets[i].period); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u32(GSCAN_ATTRIBUTE_BUCKETS_BAND, |
| mParams->buckets[i].band); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = request.put_u32(GSCAN_ATTRIBUTE_REPORT_EVENTS, |
| mParams->buckets[i].report_events); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = request.put_u32(GSCAN_ATTRIBUTE_BUCKET_NUM_CHANNELS, |
| mParams->buckets[i].num_channels); |
| if (result < 0) { |
| return result; |
| } |
| |
| if (mParams->buckets[i].num_channels) { |
| nlattr *channels = request.attr_start(GSCAN_ATTRIBUTE_BUCKET_CHANNELS); |
| for (int j = 0; j < mParams->buckets[i].num_channels; j++) { |
| result = request.put_u32(j, mParams->buckets[i].channels[j].channel); |
| if (result < 0) { |
| return result; |
| } |
| } |
| request.attr_end(channels); |
| } |
| |
| request.attr_end(bucket); |
| } |
| |
| request.attr_end(data); |
| return WIFI_SUCCESS; |
| } |
| |
| int createScanConfigRequest(WifiRequest& request) { |
| int result = request.create(GOOGLE_OUI, GSCAN_SUBCMD_SET_SCAN_CONFIG); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u32(GSCAN_ATTRIBUTE_NUM_AP_PER_SCAN, mParams->max_ap_per_scan); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = request.put_u32(GSCAN_ATTRIBUTE_REPORT_THRESHOLD, mParams->report_threshold); |
| if (result < 0) { |
| return result; |
| } |
| |
| int num_scans = 20; |
| for (int i = 0; i < mParams->num_buckets; i++) { |
| if (mParams->buckets[i].report_events == 1) { |
| ALOGD("Setting num_scans to 1"); |
| num_scans = 1; |
| break; |
| } |
| } |
| |
| result = request.put_u32(GSCAN_ATTRIBUTE_NUM_SCANS_TO_CACHE, num_scans); |
| if (result < 0) { |
| return result; |
| } |
| |
| request.attr_end(data); |
| return WIFI_SUCCESS; |
| } |
| |
| int createStartRequest(WifiRequest& request) { |
| return createFeatureRequest(request, GSCAN_SUBCMD_ENABLE_GSCAN, 1); |
| } |
| |
| int createStopRequest(WifiRequest& request) { |
| return createFeatureRequest(request, GSCAN_SUBCMD_ENABLE_GSCAN, 0); |
| } |
| |
| int enableFullScanResultsIfRequired() { |
| /* temporary workaround till we have full support for per bucket scans */ |
| |
| ALOGI("enabling full scan results if needed"); |
| int nBuckets = 0; |
| for (int i = 0; i < mParams->num_buckets; i++) { |
| if (mParams->buckets[i].report_events == 2) { |
| nBuckets++; |
| } |
| } |
| |
| if (mGlobalFullScanBuckets == 0 && nBuckets != 0) { |
| int result = wifi_enable_full_scan_results(0x1000, ifaceHandle(), mHandler); |
| if (result != WIFI_SUCCESS) { |
| ALOGI("failed to enable full scan results"); |
| return result; |
| } else { |
| ALOGI("successfully enabled full scan results"); |
| } |
| } else { |
| ALOGI("mGlobalFullScanBuckets = %d, nBuckets = %d", mGlobalFullScanBuckets, nBuckets); |
| } |
| |
| mLocalFullScanBuckets = nBuckets; |
| mGlobalFullScanBuckets += nBuckets; |
| return WIFI_SUCCESS; |
| } |
| |
| int disableFullScanResultsIfRequired() { |
| /* temporary workaround till we have full support for per bucket scans */ |
| |
| if (mLocalFullScanBuckets == 0) { |
| return WIFI_SUCCESS; |
| } |
| |
| mGlobalFullScanBuckets -= mLocalFullScanBuckets; |
| if (mGlobalFullScanBuckets == 0) { |
| int result = wifi_disable_full_scan_results(0x1000, ifaceHandle()); |
| if (result != WIFI_SUCCESS) { |
| ALOGI("failed to disable full scan results"); |
| } else { |
| ALOGI("successfully disable full scan results"); |
| } |
| } |
| |
| return WIFI_SUCCESS; |
| } |
| |
| int start() { |
| ALOGD("Setting configuration"); |
| WifiRequest request(familyId(), ifaceId()); |
| int result = createSetupRequest(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to create setup request; result = %d", result); |
| return result; |
| } |
| |
| result = requestResponse(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to configure setup; result = %d", result); |
| return result; |
| } |
| |
| request.destroy(); |
| |
| result = createScanConfigRequest(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to create scan config request; result = %d", result); |
| return result; |
| } |
| |
| result = requestResponse(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to configure scan; result = %d", result); |
| return result; |
| } |
| |
| ALOGD("Starting scan"); |
| |
| result = createStartRequest(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to create start request; result = %d", result); |
| return result; |
| } |
| |
| registerVendorHandler(GOOGLE_OUI, GSCAN_EVENT_SCAN_RESULTS_AVAILABLE); |
| registerVendorHandler(GOOGLE_OUI, GSCAN_EVENT_COMPLETE_SCAN); |
| |
| result = requestResponse(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to start scan; result = %d", result); |
| registerVendorHandler(GOOGLE_OUI, GSCAN_EVENT_COMPLETE_SCAN); |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_SCAN_RESULTS_AVAILABLE); |
| return result; |
| } |
| |
| result = enableFullScanResultsIfRequired(); |
| return result; |
| } |
| |
| virtual int cancel() { |
| ALOGD("Stopping scan"); |
| |
| WifiRequest request(familyId(), ifaceId()); |
| int result = createStopRequest(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to create stop request; result = %d", result); |
| } else { |
| result = requestResponse(request); |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to stop scan; result = %d", result); |
| } |
| } |
| |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_COMPLETE_SCAN); |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_SCAN_RESULTS_AVAILABLE); |
| disableFullScanResultsIfRequired(); |
| |
| return WIFI_SUCCESS; |
| } |
| |
| virtual int handleResponse(WifiEvent& reply) { |
| /* Nothing to do on response! */ |
| return NL_SKIP; |
| } |
| |
| virtual int handleEvent(WifiEvent& event) { |
| ALOGI("Got a scan results event"); |
| |
| // event.log(); |
| |
| nlattr *vendor_data = event.get_attribute(NL80211_ATTR_VENDOR_DATA); |
| int len = event.get_vendor_data_len(); |
| int event_id = event.get_vendor_subcmd(); |
| |
| if(event_id == GSCAN_EVENT_COMPLETE_SCAN) { |
| if (vendor_data == NULL || len != 4) { |
| ALOGI("Scan complete type not mentioned!"); |
| return NL_SKIP; |
| } |
| wifi_scan_event evt_type; |
| |
| evt_type = (wifi_scan_event) event.get_u32(NL80211_ATTR_VENDOR_DATA); |
| ALOGI("Scan complete: Received event type %d", evt_type); |
| if(*mHandler.on_scan_event) |
| (*mHandler.on_scan_event)(evt_type, evt_type); |
| } else { |
| |
| if (vendor_data == NULL || len != 4) { |
| ALOGI("No scan results found"); |
| return NL_SKIP; |
| } |
| |
| int num = event.get_u32(NL80211_ATTR_VENDOR_DATA); |
| ALOGI("Found %d scan results", num); |
| if(*mHandler.on_scan_results_available) |
| (*mHandler.on_scan_results_available)(id(), num); |
| } |
| return NL_SKIP; |
| } |
| }; |
| |
| unsigned ScanCommand::mGlobalFullScanBuckets = 0; |
| |
| wifi_error wifi_start_gscan( |
| wifi_request_id id, |
| wifi_interface_handle iface, |
| wifi_scan_cmd_params params, |
| wifi_scan_result_handler handler) |
| { |
| wifi_handle handle = getWifiHandle(iface); |
| |
| ALOGD("Starting GScan, halHandle = %p", handle); |
| |
| ScanCommand *cmd = new ScanCommand(iface, id, ¶ms, handler); |
| wifi_register_cmd(handle, id, cmd); |
| return (wifi_error)cmd->start(); |
| } |
| |
| wifi_error wifi_stop_gscan(wifi_request_id id, wifi_interface_handle iface) |
| { |
| ALOGD("Stopping GScan"); |
| wifi_handle handle = getWifiHandle(iface); |
| |
| if(id == -1) { |
| wifi_scan_result_handler handler; |
| wifi_scan_cmd_params dummy_params; |
| wifi_handle handle = getWifiHandle(iface); |
| memset(&handler, 0, sizeof(handler)); |
| |
| ScanCommand *cmd = new ScanCommand(iface, id, &dummy_params, handler); |
| cmd->cancel(); |
| cmd->releaseRef(); |
| return WIFI_SUCCESS; |
| } |
| |
| |
| WifiCommand *cmd = wifi_unregister_cmd(handle, id); |
| if (cmd) { |
| cmd->cancel(); |
| cmd->releaseRef(); |
| return WIFI_SUCCESS; |
| } |
| |
| return WIFI_ERROR_INVALID_ARGS; |
| } |
| |
| |
| wifi_error wifi_enable_full_scan_results( |
| wifi_request_id id, |
| wifi_interface_handle iface, |
| wifi_scan_result_handler handler) |
| { |
| wifi_handle handle = getWifiHandle(iface); |
| int params_dummy; |
| ALOGD("Enabling full scan results, halHandle = %p", handle); |
| |
| FullScanResultsCommand *cmd = new FullScanResultsCommand(iface, id, ¶ms_dummy, handler); |
| wifi_register_cmd(handle, id, cmd); |
| |
| return (wifi_error)cmd->start(); |
| } |
| |
| wifi_error wifi_disable_full_scan_results(wifi_request_id id, wifi_interface_handle iface) |
| { |
| ALOGD("Disabling full scan results"); |
| wifi_handle handle = getWifiHandle(iface); |
| |
| if(id == -1) { |
| wifi_scan_result_handler handler; |
| wifi_handle handle = getWifiHandle(iface); |
| int params_dummy; |
| |
| memset(&handler, 0, sizeof(handler)); |
| FullScanResultsCommand *cmd = new FullScanResultsCommand(iface, 0, ¶ms_dummy, handler); |
| cmd->cancel(); |
| cmd->releaseRef(); |
| return WIFI_SUCCESS; |
| } |
| |
| WifiCommand *cmd = wifi_unregister_cmd(handle, id); |
| if (cmd) { |
| cmd->cancel(); |
| cmd->releaseRef(); |
| return WIFI_SUCCESS; |
| } |
| |
| return WIFI_ERROR_INVALID_ARGS; |
| } |
| |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| class GetScanResultsCommand : public WifiCommand { |
| wifi_scan_result *mResults; |
| int mMax; |
| int *mNum; |
| int mRetrieved; |
| byte mFlush; |
| int mCompleted; |
| public: |
| GetScanResultsCommand(wifi_interface_handle iface, byte flush, |
| wifi_scan_result *results, int max, int *num) |
| : WifiCommand(iface, -1), mResults(results), mMax(max), mNum(num), |
| mRetrieved(0), mFlush(flush), mCompleted(0) |
| { } |
| |
| int createRequest(WifiRequest& request, int num, byte flush) { |
| int result = request.create(GOOGLE_OUI, GSCAN_SUBCMD_GET_SCAN_RESULTS); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u32(GSCAN_ATTRIBUTE_NUM_OF_RESULTS, num); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = request.put_u8(GSCAN_ATTRIBUTE_FLUSH_RESULTS, flush); |
| if (result < 0) { |
| return result; |
| } |
| |
| request.attr_end(data); |
| return WIFI_SUCCESS; |
| } |
| |
| int execute() { |
| WifiRequest request(familyId(), ifaceId()); |
| ALOGI("retrieving %d scan results", mMax); |
| |
| for (int i = 0; i < 10 && mRetrieved < mMax; i++) { |
| int result = createRequest(request, (mMax - mRetrieved), mFlush); |
| if (result < 0) { |
| ALOGE("failed to create request"); |
| return result; |
| } |
| |
| int prev_retrieved = mRetrieved; |
| |
| result = requestResponse(request); |
| |
| if (result != WIFI_SUCCESS) { |
| ALOGE("failed to retrieve scan results; result = %d", result); |
| return result; |
| } |
| |
| if (mRetrieved == prev_retrieved || mCompleted) { |
| /* no more items left to retrieve */ |
| break; |
| } |
| |
| request.destroy(); |
| } |
| |
| ALOGE("GetScanResults read %d results", mRetrieved); |
| *mNum = mRetrieved; |
| return WIFI_SUCCESS; |
| } |
| |
| virtual int handleResponse(WifiEvent& reply) { |
| ALOGD("In GetScanResultsCommand::handleResponse"); |
| |
| if (reply.get_cmd() != NL80211_CMD_VENDOR) { |
| ALOGD("Ignoring reply with cmd = %d", reply.get_cmd()); |
| return NL_SKIP; |
| } |
| |
| int id = reply.get_vendor_id(); |
| int subcmd = reply.get_vendor_subcmd(); |
| |
| ALOGD("Id = %0x, subcmd = %d", id, subcmd); |
| |
| /* |
| if (subcmd != GSCAN_SUBCMD_SCAN_RESULTS) { |
| ALOGE("Invalid response to GetScanResultsCommand; ignoring it"); |
| return NL_SKIP; |
| } |
| */ |
| |
| nlattr *vendor_data = reply.get_attribute(NL80211_ATTR_VENDOR_DATA); |
| int len = reply.get_vendor_data_len(); |
| |
| if (vendor_data == NULL || len == 0) { |
| ALOGE("no vendor data in GetScanResults response; ignoring it"); |
| return NL_SKIP; |
| } |
| |
| for (nl_iterator it(vendor_data); it.has_next(); it.next()) { |
| if (it.get_type() == GSCAN_ATTRIBUTE_SCAN_RESULTS_COMPLETE) { |
| mCompleted = it.get_u8(); |
| ALOGI("retrieved mCompleted flag : %d", mCompleted); |
| } else if (it.get_type() == GSCAN_ATTRIBUTE_SCAN_RESULTS || it.get_type() == 0) { |
| for (nl_iterator it2(it.get()); it2.has_next(); it2.next()) { |
| int scan_id = 0, flags = 0, num = 0; |
| if (it2.get_type() == GSCAN_ATTRIBUTE_SCAN_ID) { |
| scan_id = it.get_u32(); |
| } else if (it2.get_type() == GSCAN_ATTRIBUTE_SCAN_FLAGS) { |
| flags = it.get_u8(); |
| } else if (it2.get_type() == GSCAN_ATTRIBUTE_NUM_OF_RESULTS) { |
| num = it2.get_u32(); |
| } else if (it2.get_type() == GSCAN_ATTRIBUTE_SCAN_RESULTS) { |
| num = it2.get_len() / sizeof(wifi_scan_result); |
| num = min(*mNum - mRetrieved, num); |
| memcpy(mResults + mRetrieved, it2.get_data(), |
| sizeof(wifi_scan_result) * num); |
| ALOGI("Retrieved %d scan results", num); |
| wifi_scan_result *results = (wifi_scan_result *)it2.get_data(); |
| for (int i = 0; i < num; i++) { |
| wifi_scan_result *result = results + i; |
| ALOGI("%02d %-32s %02x:%02x:%02x:%02x:%02x:%02x %04d", i, |
| result->ssid, result->bssid[0], result->bssid[1], result->bssid[2], |
| result->bssid[3], result->bssid[4], result->bssid[5], |
| result->rssi); |
| } |
| mRetrieved += num; |
| } else { |
| ALOGW("Ignoring invalid attribute type = %d, size = %d", |
| it.get_type(), it.get_len()); |
| } |
| } |
| } else { |
| ALOGW("Ignoring invalid attribute type = %d, size = %d", |
| it.get_type(), it.get_len()); |
| } |
| } |
| |
| return NL_OK; |
| } |
| }; |
| |
| wifi_error wifi_get_cached_gscan_results(wifi_interface_handle iface, byte flush, |
| int max, wifi_scan_result *results, int *num) { |
| |
| ALOGD("Getting cached scan results, iface handle = %p, num = %d", iface, *num); |
| |
| GetScanResultsCommand *cmd = new GetScanResultsCommand(iface, flush, results, max, num); |
| return (wifi_error)cmd->execute(); |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| class BssidHotlistCommand : public WifiCommand |
| { |
| private: |
| wifi_bssid_hotlist_params mParams; |
| wifi_hotlist_ap_found_handler mHandler; |
| static const int MAX_RESULTS = 64; |
| wifi_scan_result mResults[MAX_RESULTS]; |
| public: |
| BssidHotlistCommand(wifi_interface_handle handle, int id, |
| wifi_bssid_hotlist_params params, wifi_hotlist_ap_found_handler handler) |
| : WifiCommand(handle, id), mParams(params), mHandler(handler) |
| { } |
| |
| int createSetupRequest(WifiRequest& request) { |
| int result = request.create(GOOGLE_OUI, GSCAN_SUBCMD_SET_HOTLIST); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u8(GSCAN_ATTRIBUTE_HOTLIST_FLUSH, 1); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = request.put_u32(GSCAN_ATTRIBUTE_LOST_AP_SAMPLE_SIZE, mParams.lost_ap_sample_size); |
| if (result < 0) { |
| return result; |
| } |
| |
| struct nlattr * attr = request.attr_start(GSCAN_ATTRIBUTE_HOTLIST_BSSIDS); |
| for (int i = 0; i < mParams.num_ap; i++) { |
| nlattr *attr2 = request.attr_start(GSCAN_ATTRIBUTE_HOTLIST_ELEM); |
| if (attr2 == NULL) { |
| return WIFI_ERROR_OUT_OF_MEMORY; |
| } |
| result = request.put_addr(GSCAN_ATTRIBUTE_BSSID, mParams.ap[i].bssid); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u8(GSCAN_ATTRIBUTE_RSSI_HIGH, mParams.ap[i].high); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u8(GSCAN_ATTRIBUTE_RSSI_LOW, mParams.ap[i].low); |
| if (result < 0) { |
| return result; |
| } |
| request.attr_end(attr2); |
| } |
| |
| request.attr_end(attr); |
| request.attr_end(data); |
| return result; |
| } |
| |
| int createTeardownRequest(WifiRequest& request) { |
| int result = request.create(GOOGLE_OUI, GSCAN_SUBCMD_SET_HOTLIST); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u8(GSCAN_ATTRIBUTE_HOTLIST_FLUSH, 1); |
| if (result < 0) { |
| return result; |
| } |
| |
| struct nlattr * attr = request.attr_start(GSCAN_ATTRIBUTE_HOTLIST_BSSIDS); |
| request.attr_end(attr); |
| request.attr_end(data); |
| return result; |
| } |
| |
| int start() { |
| ALOGI("Executing hotlist setup request, num = %d", mParams.num_ap); |
| WifiRequest request(familyId(), ifaceId()); |
| int result = createSetupRequest(request); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = requestResponse(request); |
| if (result < 0) { |
| ALOGI("Failed to execute hotlist setup request, result = %d", result); |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_FOUND); |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_LOST); |
| return result; |
| } |
| |
| ALOGI("Successfully set %d APs in the hotlist", mParams.num_ap); |
| result = createFeatureRequest(request, GSCAN_SUBCMD_ENABLE_GSCAN, 1); |
| if (result < 0) { |
| return result; |
| } |
| |
| registerVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_FOUND); |
| registerVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_LOST); |
| |
| result = requestResponse(request); |
| if (result < 0) { |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_FOUND); |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_LOST); |
| return result; |
| } |
| |
| ALOGI("successfully restarted the scan"); |
| return result; |
| } |
| |
| virtual int cancel() { |
| /* unregister event handler */ |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_FOUND); |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_HOTLIST_RESULTS_LOST); |
| /* create set hotlist message with empty hotlist */ |
| WifiRequest request(familyId(), ifaceId()); |
| int result = createTeardownRequest(request); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = requestResponse(request); |
| if (result < 0) { |
| return result; |
| } |
| |
| ALOGI("Successfully reset APs in current hotlist"); |
| return result; |
| } |
| |
| virtual int handleResponse(WifiEvent& reply) { |
| /* Nothing to do on response! */ |
| return NL_SKIP; |
| } |
| |
| virtual int handleEvent(WifiEvent& event) { |
| ALOGI("Hotlist AP event"); |
| int event_id = event.get_vendor_subcmd(); |
| // event.log(); |
| |
| nlattr *vendor_data = event.get_attribute(NL80211_ATTR_VENDOR_DATA); |
| int len = event.get_vendor_data_len(); |
| |
| if (vendor_data == NULL || len == 0) { |
| ALOGI("No scan results found"); |
| return NL_SKIP; |
| } |
| |
| memset(mResults, 0, sizeof(wifi_scan_result) * MAX_RESULTS); |
| |
| int num = len / sizeof(wifi_scan_result); |
| num = min(MAX_RESULTS, num); |
| memcpy(mResults, event.get_vendor_data(), num * sizeof(wifi_scan_result)); |
| |
| if (event_id == GSCAN_EVENT_HOTLIST_RESULTS_FOUND) { |
| ALOGI("FOUND %d hotlist APs", num); |
| if (*mHandler.on_hotlist_ap_found) |
| (*mHandler.on_hotlist_ap_found)(id(), num, mResults); |
| } else if (event_id == GSCAN_EVENT_HOTLIST_RESULTS_LOST) { |
| ALOGI("LOST %d hotlist APs", num); |
| if (*mHandler.on_hotlist_ap_lost) |
| (*mHandler.on_hotlist_ap_lost)(id(), num, mResults); |
| } |
| return NL_SKIP; |
| } |
| }; |
| |
| wifi_error wifi_set_bssid_hotlist(wifi_request_id id, wifi_interface_handle iface, |
| wifi_bssid_hotlist_params params, wifi_hotlist_ap_found_handler handler) |
| { |
| wifi_handle handle = getWifiHandle(iface); |
| |
| BssidHotlistCommand *cmd = new BssidHotlistCommand(iface, id, params, handler); |
| wifi_register_cmd(handle, id, cmd); |
| return (wifi_error)cmd->start(); |
| } |
| |
| wifi_error wifi_reset_bssid_hotlist(wifi_request_id id, wifi_interface_handle iface) |
| { |
| wifi_handle handle = getWifiHandle(iface); |
| |
| WifiCommand *cmd = wifi_unregister_cmd(handle, id); |
| if (cmd) { |
| cmd->cancel(); |
| cmd->releaseRef(); |
| return WIFI_SUCCESS; |
| } |
| |
| return WIFI_ERROR_INVALID_ARGS; |
| } |
| |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| class SignificantWifiChangeCommand : public WifiCommand |
| { |
| typedef struct { |
| mac_addr bssid; // BSSID |
| wifi_channel channel; // channel frequency in MHz |
| int num_rssi; // number of rssi samples |
| wifi_rssi rssi[8]; // RSSI history in db |
| } wifi_significant_change_result_internal; |
| |
| private: |
| wifi_significant_change_params mParams; |
| wifi_significant_change_handler mHandler; |
| static const int MAX_RESULTS = 64; |
| wifi_significant_change_result_internal mResultsBuffer[MAX_RESULTS]; |
| wifi_significant_change_result *mResults[MAX_RESULTS]; |
| public: |
| SignificantWifiChangeCommand(wifi_interface_handle handle, int id, |
| wifi_significant_change_params params, wifi_significant_change_handler handler) |
| : WifiCommand(handle, id), mParams(params), mHandler(handler) |
| { } |
| |
| int createSetupRequest(WifiRequest& request) { |
| int result = request.create(GOOGLE_OUI, GSCAN_SUBCMD_SET_SIGNIFICANT_CHANGE_CONFIG); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u8(GSCAN_ATTRIBUTE_SIGNIFICANT_CHANGE_FLUSH, 1); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u16(GSCAN_ATTRIBUTE_RSSI_SAMPLE_SIZE, mParams.rssi_sample_size); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u16(GSCAN_ATTRIBUTE_LOST_AP_SAMPLE_SIZE, mParams.lost_ap_sample_size); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u16(GSCAN_ATTRIBUTE_MIN_BREACHING, mParams.min_breaching); |
| if (result < 0) { |
| return result; |
| } |
| |
| struct nlattr * attr = request.attr_start(GSCAN_ATTRIBUTE_SIGNIFICANT_CHANGE_BSSIDS); |
| |
| for (int i = 0; i < mParams.num_ap; i++) { |
| |
| nlattr *attr2 = request.attr_start(i); |
| if (attr2 == NULL) { |
| return WIFI_ERROR_OUT_OF_MEMORY; |
| } |
| result = request.put_addr(GSCAN_ATTRIBUTE_BSSID, mParams.ap[i].bssid); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u8(GSCAN_ATTRIBUTE_RSSI_HIGH, mParams.ap[i].high); |
| if (result < 0) { |
| return result; |
| } |
| result = request.put_u8(GSCAN_ATTRIBUTE_RSSI_LOW, mParams.ap[i].low); |
| if (result < 0) { |
| return result; |
| } |
| request.attr_end(attr2); |
| } |
| |
| request.attr_end(attr); |
| request.attr_end(data); |
| |
| return result; |
| } |
| |
| int createTeardownRequest(WifiRequest& request) { |
| int result = request.create(GOOGLE_OUI, GSCAN_SUBCMD_SET_SIGNIFICANT_CHANGE_CONFIG); |
| if (result < 0) { |
| return result; |
| } |
| |
| nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA); |
| result = request.put_u16(GSCAN_ATTRIBUTE_SIGNIFICANT_CHANGE_FLUSH, 1); |
| if (result < 0) { |
| return result; |
| } |
| |
| request.attr_end(data); |
| return result; |
| } |
| |
| int start() { |
| ALOGI("Set significant wifi change config"); |
| WifiRequest request(familyId(), ifaceId()); |
| |
| int result = createSetupRequest(request); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = requestResponse(request); |
| if (result < 0) { |
| ALOGI("failed to set significant wifi change config %d", result); |
| return result; |
| } |
| |
| ALOGI("successfully set significant wifi change config"); |
| |
| result = createFeatureRequest(request, GSCAN_SUBCMD_ENABLE_GSCAN, 1); |
| if (result < 0) { |
| return result; |
| } |
| |
| registerVendorHandler(GOOGLE_OUI, GSCAN_EVENT_SIGNIFICANT_CHANGE_RESULTS); |
| |
| result = requestResponse(request); |
| if (result < 0) { |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_SIGNIFICANT_CHANGE_RESULTS); |
| return result; |
| } |
| |
| ALOGI("successfully restarted the scan"); |
| return result; |
| } |
| |
| virtual int cancel() { |
| /* unregister event handler */ |
| unregisterVendorHandler(GOOGLE_OUI, GSCAN_EVENT_SIGNIFICANT_CHANGE_RESULTS); |
| |
| /* create set significant change monitor message with empty hotlist */ |
| WifiRequest request(familyId(), ifaceId()); |
| |
| int result = createTeardownRequest(request); |
| if (result < 0) { |
| return result; |
| } |
| |
| result = requestResponse(request); |
| if (result < 0) { |
| return result; |
| } |
| |
| ALOGI("successfully reset significant wifi change config"); |
| return result; |
| } |
| |
| virtual int handleResponse(WifiEvent& reply) { |
| /* Nothing to do on response! */ |
| return NL_SKIP; |
| } |
| |
| virtual int handleEvent(WifiEvent& event) { |
| ALOGI("Got a significant wifi change event"); |
| |
| nlattr *vendor_data = event.get_attribute(NL80211_ATTR_VENDOR_DATA); |
| int len = event.get_vendor_data_len(); |
| |
| if (vendor_data == NULL || len == 0) { |
| ALOGI("No scan results found"); |
| return NL_SKIP; |
| } |
| |
| typedef struct { |
| uint16_t flags; |
| uint16_t channel; |
| mac_addr bssid; |
| s8 rssi_history[8]; |
| } ChangeInfo; |
| |
| int num = min(len / sizeof(ChangeInfo), MAX_RESULTS); |
| ChangeInfo *ci = (ChangeInfo *)event.get_vendor_data(); |
| |
| for (int i = 0; i < num; i++) { |
| memcpy(mResultsBuffer[i].bssid, ci[i].bssid, sizeof(mac_addr)); |
| mResultsBuffer[i].channel = ci[i].channel; |
| mResultsBuffer[i].num_rssi = 8; |
| for (int j = 0; j < mResultsBuffer[i].num_rssi; j++) |
| mResultsBuffer[i].rssi[j] = (int) ci[i].rssi_history[j]; |
| mResults[i] = reinterpret_cast<wifi_significant_change_result *>(&(mResultsBuffer[i])); |
| } |
| |
| ALOGI("Retrieved %d scan results", num); |
| |
| if (num != 0) { |
| (*mHandler.on_significant_change)(id(), num, mResults); |
| } else { |
| ALOGW("No significant change reported"); |
| } |
| |
| return NL_SKIP; |
| } |
| }; |
| |
| wifi_error wifi_set_significant_change_handler(wifi_request_id id, wifi_interface_handle iface, |
| wifi_significant_change_params params, wifi_significant_change_handler handler) |
| { |
| wifi_handle handle = getWifiHandle(iface); |
| |
| SignificantWifiChangeCommand *cmd = new SignificantWifiChangeCommand( |
| iface, id, params, handler); |
| wifi_register_cmd(handle, id, cmd); |
| return (wifi_error)cmd->start(); |
| } |
| |
| wifi_error wifi_reset_significant_change_handler(wifi_request_id id, wifi_interface_handle iface) |
| { |
| wifi_handle handle = getWifiHandle(iface); |
| |
| WifiCommand *cmd = wifi_unregister_cmd(handle, id); |
| if (cmd) { |
| cmd->cancel(); |
| cmd->releaseRef(); |
| return WIFI_SUCCESS; |
| } |
| |
| return WIFI_ERROR_INVALID_ARGS; |
| } |