1/*
2 * Copyright (C) 2017 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 <algorithm>
18
19#include "chre/apps/wifi_offload/chre_scan_params_safe.h"
20#include "chre/apps/wifi_offload/utility.h"
21
22namespace wifi_offload {
23
24ChreScanParamsSafe::ChreScanParamsSafe(const ScanParams &scan_params) {
25  // point chre_scan_params_ pointers to allocated buffers
26  chre_scan_params_.frequencyList = chre_scan_params_frequencies_;
27  chre_scan_params_.ssidList = chre_scan_params_ssids_;
28
29  UpdateFromScanParams(scan_params);
30}
31
32const chreWifiScanParams *ChreScanParamsSafe::GetChreWifiScanParams() {
33  return &chre_scan_params_;
34}
35
36void ChreScanParamsSafe::Log() const {
37  LOGI("chreWifiScanParams:");
38  LOGI("  scan type: %" PRIu8, chre_scan_params_.scanType);
39  LOGI("  max scan age (ms): %" PRIu32, chre_scan_params_.maxScanAgeMs);
40  LOGI("  frequency list length: %" PRIu16, chre_scan_params_.frequencyListLen);
41  for (size_t i = 0; i < chre_scan_params_.frequencyListLen; i++) {
42    LOGI("  frequency: %" PRIu32, chre_scan_params_.frequencyList[i]);
43  }
44  LOGI("  ssid list length: %" PRIu8, chre_scan_params_.ssidListLen);
45  for (size_t i = 0; i < chre_scan_params_.ssidListLen; i++) {
46    utility::LogSsid(chre_scan_params_.ssidList[i].ssid,
47                     chre_scan_params_.ssidList[i].ssidLen);
48  }
49}
50
51void ChreScanParamsSafe::UpdateFromScanParams(const ScanParams &scan_params) {
52  chre_scan_params_.scanType = CHRE_WIFI_SCAN_TYPE_ACTIVE_PLUS_PASSIVE_DFS;
53  chre_scan_params_.maxScanAgeMs = 0;
54
55  chre_scan_params_.frequencyListLen = std::min(
56      static_cast<uint16_t>(scan_params.frequencies_to_scan_mhz_.size()),
57      static_cast<uint16_t>(CHRE_WIFI_FREQUENCY_LIST_MAX_LEN));
58  if (chre_scan_params_.frequencyListLen <
59      scan_params.frequencies_to_scan_mhz_.size()) {
60    LOGW("Too many ScanParams frequencies %zu truncated to max %" PRIu16,
61         scan_params.frequencies_to_scan_mhz_.size(),
62         chre_scan_params_.frequencyListLen);
63  }
64
65  std::copy(scan_params.frequencies_to_scan_mhz_.begin(),
66            scan_params.frequencies_to_scan_mhz_.begin() +
67                chre_scan_params_.frequencyListLen,
68            chre_scan_params_frequencies_);
69
70  chre_scan_params_.ssidListLen =
71      std::min(static_cast<uint8_t>(scan_params.ssids_to_scan_.size()),
72               static_cast<uint8_t>(CHRE_WIFI_SSID_LIST_MAX_LEN));
73  if (chre_scan_params_.ssidListLen < scan_params.ssids_to_scan_.size()) {
74    LOGW("Too many ScanParams ssids %zu truncated to max %" PRIu8,
75         scan_params.ssids_to_scan_.size(), chre_scan_params_.ssidListLen);
76  }
77
78  for (size_t i = 0; i < chre_scan_params_.ssidListLen; i++) {
79    scan_params.ssids_to_scan_[i].ToChreWifiSsidListItem(
80        &chre_scan_params_ssids_[i]);
81  }
82}
83
84}  // namespace wifi_offload
85