1 /*
2 * Copyright (C) 2021 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 "chpp/common/wifi_utils.h"
18
19 #include <inttypes.h>
20
21 #include "chpp/log.h"
22
23 static uint8_t gResultTotal = 0;
24 static uint8_t gResultAcc = 0;
25 static uint8_t gExpectedIndex = 0;
26
chppCheckWifiScanEventNotificationReset()27 void chppCheckWifiScanEventNotificationReset() {
28 gResultTotal = 0;
29 gResultAcc = 0;
30 gExpectedIndex = 0;
31 }
32
chppCheckWifiScanEventNotification(const struct chreWifiScanEvent * chre)33 bool chppCheckWifiScanEventNotification(const struct chreWifiScanEvent *chre) {
34 bool success = true;
35
36 if (chre->eventIndex != gExpectedIndex) {
37 CHPP_LOGE("Unexpected scan index %" PRIu8 " exp %" PRIu8, chre->eventIndex,
38 gExpectedIndex);
39 success = false;
40 }
41 if (chre->eventIndex == 0) {
42 if (gResultAcc < gResultTotal) {
43 CHPP_LOGE("Too few prev scan results (%" PRIu8 " missing)",
44 gResultTotal - gResultAcc);
45 success = false;
46 }
47 gExpectedIndex = 0;
48 gResultAcc = 0;
49 gResultTotal = chre->resultTotal;
50 }
51
52 if (gResultTotal != chre->resultTotal) {
53 CHPP_LOGE("Inconsistent result total %" PRIu8 " exp %" PRIu8,
54 chre->resultTotal, gResultTotal);
55 success = false;
56 }
57
58 gResultAcc += chre->resultCount;
59
60 if (gResultAcc >= gResultTotal) {
61 if (gResultAcc > gResultTotal) {
62 CHPP_LOGE("Too many scan results (%" PRIu8 " extra)",
63 gResultAcc - gResultTotal);
64 success = false;
65 }
66 gExpectedIndex = 0;
67 } else {
68 gExpectedIndex++;
69 }
70
71 return success;
72 }
73