document code origins

fixes #65
This commit is contained in:
Michael Stapelberg 2015-09-25 11:39:50 +02:00
parent 06a133135f
commit f3125fdfde

View File

@ -100,6 +100,7 @@ static void print_bitrate(char *buffer, int buflen, int bitrate) {
snprintf(buffer, buflen, "%g %cb/s", rate / divisor, scale);
}
// Based on NetworkManager/src/platform/wifi/wifi-utils-nl80211.c
static uint32_t nl80211_xbm_to_percent(int32_t xbm, uint32_t divisor) {
#define NOISE_FLOOR_DBM -90
#define SIGNAL_MAX_DBM -20
@ -113,9 +114,9 @@ static uint32_t nl80211_xbm_to_percent(int32_t xbm, uint32_t divisor) {
return 100 - 70 * (((float)SIGNAL_MAX_DBM - (float)xbm) / ((float)SIGNAL_MAX_DBM - (float)NOISE_FLOOR_DBM));
}
#define WLAN_EID_SSID 0
// Based on NetworkManager/src/platform/wifi/wifi-utils-nl80211.c
static void find_ssid(uint8_t *ies, uint32_t ies_len, uint8_t **ssid, uint32_t *ssid_len) {
#define WLAN_EID_SSID 0
*ssid = NULL;
*ssid_len = 0;