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 "chre/util/nanoapp/wifi.h"
18
19 #ifdef CHRE_IS_NANOAPP_BUILD
20 #include "util/nanoapp/log.h"
21 #else
22 #include "chre/platform/log.h"
23 #endif // CHRE_IS_NANOAPP_BUILD
24
25 #include <cctype>
26 #include <cinttypes>
27 #include <cstdio>
28 #include <cstring>
29
30 namespace chre {
31
logChreWifiResult(const chreWifiScanResult & result,bool logSsidOnly)32 void logChreWifiResult(const chreWifiScanResult &result, bool logSsidOnly) {
33 const char *ssidStr = "<non-printable>";
34 char ssidBuffer[kMaxSsidStrLen];
35 if (result.ssidLen == 0) {
36 ssidStr = "<empty>";
37 } else if (parseSsidToStr(ssidBuffer, sizeof(ssidBuffer), result.ssid,
38 result.ssidLen)) {
39 ssidStr = ssidBuffer;
40 }
41
42 LOGI("Found network with SSID: %s", ssidStr);
43 if (!logSsidOnly) {
44 const char *bssidStr = "<non-printable>";
45 char bssidBuffer[kBssidStrLen];
46 if (parseBssidToStr(result.bssid, bssidBuffer, sizeof(bssidBuffer))) {
47 bssidStr = bssidBuffer;
48 }
49
50 LOGI(" age (ms): %" PRIu32, result.ageMs);
51 LOGI(" capability info: %" PRIx16, result.capabilityInfo);
52 LOGI(" bssid: %s", bssidStr);
53 LOGI(" flags: %" PRIx8, result.flags);
54 LOGI(" rssi: %" PRId8 "dBm", result.rssi);
55 LOGI(" band: %s (%" PRIu8 ")", parseChreWifiBand(result.band),
56 result.band);
57 LOGI(" primary channel: %" PRIu32, result.primaryChannel);
58 LOGI(" center frequency primary: %" PRIu32, result.centerFreqPrimary);
59 LOGI(" center frequency secondary: %" PRIu32, result.centerFreqSecondary);
60 LOGI(" channel width: %" PRIu8, result.channelWidth);
61 LOGI(" security mode: %" PRIx8, result.securityMode);
62 }
63 }
64
parseSsidToStr(char * buffer,size_t bufferLen,const uint8_t * ssid,uint8_t ssidLen)65 bool parseSsidToStr(char *buffer, size_t bufferLen, const uint8_t *ssid,
66 uint8_t ssidLen) {
67 // Ensure that there is enough space in the buffer to copy the SSID and
68 // null-terminate it.
69 bool success = (bufferLen >= static_cast<size_t>(ssidLen + 1));
70
71 if (success) {
72 // Verify that the ssid is entirely printable characters and ASCII spaces.
73 for (uint8_t i = 0; i < ssidLen; i++) {
74 if (!isgraph(ssid[i]) && ssid[i] != ' ') {
75 success = false;
76 break;
77 }
78 }
79 }
80
81 if (success) {
82 // Copy the SSID to the buffer and null-terminate.
83 memcpy(buffer, ssid, ssidLen + 1);
84 buffer[ssidLen] = '\0';
85 }
86
87 return success;
88 }
89
parseBssidToStr(const uint8_t bssid[CHRE_WIFI_BSSID_LEN],char * buffer,size_t bufferLen)90 bool parseBssidToStr(const uint8_t bssid[CHRE_WIFI_BSSID_LEN], char *buffer,
91 size_t bufferLen) {
92 const char *kFormat = "%02" PRIx8 ":%02" PRIx8 ":%02" PRIx8 ":%02" PRIx8
93 ":%02" PRIx8 ":%02" PRIx8;
94
95 bool success = false;
96 if (bufferLen >= kBssidStrLen) {
97 success = true;
98 snprintf(buffer, bufferLen, kFormat, bssid[0], bssid[1], bssid[2], bssid[3],
99 bssid[4], bssid[5]);
100 }
101
102 return success;
103 }
104
parseChreWifiBand(uint8_t band)105 const char *parseChreWifiBand(uint8_t band) {
106 switch (band) {
107 case CHRE_WIFI_BAND_2_4_GHZ:
108 return "2.4GHz";
109 case CHRE_WIFI_BAND_MASK_5_GHZ:
110 return "5GHz";
111 default:
112 return "<invalid>";
113 }
114 }
115
116 } // namespace chre
117
