1 /*
2  * Copyright (C) 2016 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 #ifndef WIFICOND_SCANNER_IMPL_H_
18 #define WIFICOND_SCANNER_IMPL_H_
19 
20 #include <vector>
21 
22 #include <android-base/macros.h>
23 #include <binder/Status.h>
24 
25 #include "android/net/wifi/nl80211/BnWifiScannerImpl.h"
26 #include "wificond/net/netlink_utils.h"
27 #include "wificond/scanning/scan_utils.h"
28 
29 namespace android {
30 namespace wificond {
31 
32 class ClientInterfaceImpl;
33 class ScanUtils;
34 
35 class ScannerImpl : public android::net::wifi::nl80211::BnWifiScannerImpl {
36  public:
37   ScannerImpl(uint32_t interface_index,
38               const ScanCapabilities& scan_capabilities,
39               const WiphyFeatures& wiphy_features,
40               ClientInterfaceImpl* client_interface,
41               ScanUtils* scan_utils);
42   ~ScannerImpl();
43   // Get the latest single scan results from kernel.
44   ::android::binder::Status getScanResults(
45       std::vector<android::net::wifi::nl80211::NativeScanResult>*
46           out_scan_results) override;
47   // Get the latest pno scan results from the interface that most recently
48   // completed PNO scans
49   ::android::binder::Status getPnoScanResults(
50       std::vector<android::net::wifi::nl80211::NativeScanResult>*
51           out_scan_results) override;
52   ::android::binder::Status scan(
53       const android::net::wifi::nl80211::SingleScanSettings&
54           scan_settings,
55       bool* out_success) override;
56   ::android::binder::Status startPnoScan(
57       const android::net::wifi::nl80211::PnoSettings& pno_settings,
58       bool* out_success) override;
59   ::android::binder::Status stopPnoScan(bool* out_success) override;
60   ::android::binder::Status abortScan() override;
61 
62   ::android::binder::Status subscribeScanEvents(
63       const ::android::sp<::android::net::wifi::nl80211::IScanEvent>& handler) override;
64   ::android::binder::Status unsubscribeScanEvents() override;
65   ::android::binder::Status subscribePnoScanEvents(
66       const ::android::sp<::android::net::wifi::nl80211::IPnoScanEvent>& handler)
67       override;
68   ::android::binder::Status unsubscribePnoScanEvents() override;
69   void Invalidate();
70 
71  private:
72   bool CheckIsValid();
73   void OnScanResultsReady(uint32_t interface_index, bool aborted,
74                           std::vector<std::vector<uint8_t>>& ssids,
75                           std::vector<uint32_t>& frequencies);
76   void OnSchedScanResultsReady(uint32_t interface_index, bool scan_stopped);
77   void LogSsidList(std::vector<std::vector<uint8_t>>& ssid_list,
78                    std::string prefix);
79   bool StartPnoScanDefault(
80       const android::net::wifi::nl80211::PnoSettings& pno_settings);
81   bool StopPnoScanDefault();
82   void ParsePnoSettings(
83       const android::net::wifi::nl80211::PnoSettings& pno_settings,
84       std::vector<std::vector<uint8_t>>* scan_ssids,
85       std::vector<std::vector<uint8_t>>* match_ssids,
86       std::vector<uint32_t>* freqs, std::vector<uint8_t>* match_security);
87   SchedScanIntervalSetting GenerateIntervalSetting(
88     const android::net::wifi::nl80211::PnoSettings& pno_settings) const;
89 
90   // Boolean variables describing current scanner status.
91   bool valid_;
92   bool scan_started_;
93   bool pno_scan_started_;
94   android::net::wifi::nl80211::PnoSettings pno_settings_;
95 
96   uint32_t nodev_counter_;
97   const uint32_t interface_index_;
98 
99   // Scanning relevant capability information for this wiphy/interface.
100   ScanCapabilities scan_capabilities_;
101   WiphyFeatures wiphy_features_;
102 
103   ClientInterfaceImpl* client_interface_;
104   ScanUtils* const scan_utils_;
105   ::android::sp<::android::net::wifi::nl80211::IPnoScanEvent> pno_scan_event_handler_;
106   ::android::sp<::android::net::wifi::nl80211::IScanEvent> scan_event_handler_;
107 
108   DISALLOW_COPY_AND_ASSIGN(ScannerImpl);
109 };
110 
111 }  // namespace wificond
112 }  // namespace android
113 
114 #endif  // WIFICOND_SCANNER_IMPL_H_
115