1 /**
2  * Copyright (C) 2020 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 #include <stdbool.h>
18 #include <stdint.h>
19 
20 #include "chpp/common/wifi.h"
21 #include "chpp/macros.h"
22 #include "chpp/services/wifi.h"
23 #include "chre/pal/wifi.h"
24 
25 static const struct chrePalSystemApi *gSystemApi;
26 static const struct chrePalWifiCallbacks *gCallbacks;
27 
28 static bool wifiPalOpen(const struct chrePalSystemApi *systemApi,
29                         const struct chrePalWifiCallbacks *callbacks) {
30   gSystemApi = systemApi;
31   gCallbacks = callbacks;
32 
33   return true;
34 }
35 
36 static void wifiPalClose(void) {}
37 
38 static uint32_t wifiPalGetCapabilities(void) {
39   return CHRE_WIFI_CAPABILITIES_SCAN_MONITORING |
40          CHRE_WIFI_CAPABILITIES_ON_DEMAND_SCAN;
41 }
42 
43 static bool wifiPalConfigureScanMonitor(bool enable) {
44   // TODO
45   UNUSED_VAR(enable);
46   return true;  // If successful
47 }
48 
49 static bool wifiPalRequestScan(const struct chreWifiScanParams *params) {
50   // TODO
51   UNUSED_VAR(params);
52   return true;  // If successful
53 }
54 
55 static void wifiPalReleaseScanEvent(struct chreWifiScanEvent *event) {
56   gSystemApi->memoryFree(CHPP_CONST_CAST_POINTER(event->results));
57   gSystemApi->memoryFree(event);
58 }
59 
60 static bool wifiPalRequestRanging(const struct chreWifiRangingParams *params) {
61   // TODO
62   UNUSED_VAR(params);
63   return true;  // If successful
64 }
65 
66 static void wifiPalReleaseRangingEvent(struct chreWifiRangingEvent *event) {
67   gSystemApi->memoryFree(CHPP_CONST_CAST_POINTER(event->scannedFreqList));
68   gSystemApi->memoryFree(CHPP_CONST_CAST_POINTER(event->results));
69   gSystemApi->memoryFree(event);
70 }
71 
72 #ifdef CHPP_SERVICE_ENABLED_WIFI
73 const struct chrePalWifiApi *chrePalWifiGetApi(uint32_t requestedApiVersion) {
74   static const struct chrePalWifiApi api = {
75       .moduleVersion = CHPP_PAL_WIFI_API_VERSION,
76       .open = wifiPalOpen,
77       .close = wifiPalClose,
78       .getCapabilities = wifiPalGetCapabilities,
79       .configureScanMonitor = wifiPalConfigureScanMonitor,
80       .requestScan = wifiPalRequestScan,
81       .releaseScanEvent = wifiPalReleaseScanEvent,
82       .requestRanging = wifiPalRequestRanging,
83       .releaseRangingEvent = wifiPalReleaseRangingEvent,
84   };
85 
86   CHPP_STATIC_ASSERT(
87       CHRE_PAL_WIFI_API_CURRENT_VERSION == CHPP_PAL_WIFI_API_VERSION,
88       "A newer CHRE PAL API version is available. Please update.");
89 
90   if (!CHRE_PAL_VERSIONS_ARE_COMPATIBLE(api.moduleVersion,
91                                         requestedApiVersion)) {
92     return NULL;
93   } else {
94     return &api;
95   }
96 }
97 #endif
98