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iwd
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scan: Include supported rates in ranking

This commit is contained in:
Denis Kenzior 2015-06-10 13:06:19 -05:00
parent 9eac017ec4
commit f24b550196
1 changed files with 14 additions and 1 deletions
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15
src/scan.c
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@ -379,6 +379,8 @@ void scan_bss_compute_rank(struct scan_bss *bss)
static const double RANK_5G_FACTOR = 1.1;
static const double RANK_HIGH_UTILIZATION_FACTOR = 0.8;
static const double RANK_LOW_UTILIZATION_FACTOR = 1.2;
static const double RANK_MIN_SUPPORTED_RATE_FACTOR = 0.8;
static const double RANK_MAX_SUPPORTED_RATE_FACTOR = 1.1;
double rank;
uint32_t irank;
@ -415,7 +417,18 @@ void scan_bss_compute_rank(struct scan_bss *bss)
else if (bss->utilization <= 63)
rank *= RANK_LOW_UTILIZATION_FACTOR;
/* TODO: Take maximum supported rate into consideration */
if (bss->supported_rates) {
uint8_t max = l_uintset_find_max(bss->supported_rates);
double factor = RANK_MAX_SUPPORTED_RATE_FACTOR -
RANK_MIN_SUPPORTED_RATE_FACTOR;
/*
* Maximum rate is 54 Mbps, see DATA_RATE in 802.11-2012,
* Section 6.5.5.2
*/
factor = factor * max / 108 + RANK_MIN_SUPPORTED_RATE_FACTOR;
bss->rank *= factor;
}
irank = rank;