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datastorage: use signal strength as a metric

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This adds a few options to use the signal strength as a metric, band
dependent:

 - rssi_weight: every db of signal increases the score by this much.
 - rssi_center: if the signal is stronger than this, the score becomes
                positive; below this, it is negative.
 - initial_score:  since we are capping negative scores, it may be
   beneficial to have a positive base score to offset a possible
   negative signal value.  This is replacing the 'freq' metric.

To avoid a single-digit RSSI increase resulting in a kick, we add a
global threshold value to act as a buffer:

 - kicking_threshold: a candidate AP must have a score larger than that
                      of the current AP plus the value here.

The kicking_threshold also applies when assembling the list of roaming
neighbors we send with the "wnm_disassoc_imminent" command.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
This commit is contained in:
Eneas U de Queiroz 2021-08-04 09:11:06 -03:00 • committed by Polynomdivision
parent 14e0f8386c
commit c70773a171
6 changed files with 89 additions and 32 deletions
Download patch file Download diff file Expand all files Collapse all files

21
src/utils/msghandler.c
View file

@ -580,6 +580,7 @@ enum {
UCI_EVAL_AUTH_REQ,
UCI_EVAL_ASSOC_REQ,
UCI_KICKING,
UCI_KICKING_THRESHOLD,
UCI_DENY_AUTH_REASON,
UCI_DENY_ASSOC_REASON,
UCI_USE_DRIVER_RECOG,
@ -594,7 +595,7 @@ enum {
enum {
UCI_BAND,
UCI_FREQ,
UCI_INITIAL_SCORE,
UCI_AP_WEIGHT,
UCI_HT_SUPPORT,
UCI_VHT_SUPPORT,
@ -608,6 +609,8 @@ enum {
UCI_LOW_RSSI_VAL,
UCI_CHAN_UTIL_VAL,
UCI_MAX_CHAN_UTIL_VAL,
UCI_RSSI_WEIGHT,
UCI_RSSI_CENTER,
__UCI_BAND_METRIC_MAX
};
@ -639,6 +642,7 @@ static const struct blobmsg_policy uci_metric_policy[__UCI_METRIC_MAX] = {
[UCI_EVAL_AUTH_REQ] = {.name = "eval_auth_req", .type = BLOBMSG_TYPE_INT32},
[UCI_EVAL_ASSOC_REQ] = {.name = "eval_assoc_req", .type = BLOBMSG_TYPE_INT32},
[UCI_KICKING] = {.name = "kicking", .type = BLOBMSG_TYPE_INT32},
[UCI_KICKING_THRESHOLD] = {.name = "kicking_threshold", .type = BLOBMSG_TYPE_INT32},
[UCI_DENY_AUTH_REASON] = {.name = "deny_auth_reason", .type = BLOBMSG_TYPE_INT32},
[UCI_DENY_ASSOC_REASON] = {.name = "deny_assoc_reason", .type = BLOBMSG_TYPE_INT32},
[UCI_USE_DRIVER_RECOG] = {.name = "use_driver_recog", .type = BLOBMSG_TYPE_INT32},
@ -651,7 +655,7 @@ static const struct blobmsg_policy uci_metric_policy[__UCI_METRIC_MAX] = {
};
static const struct blobmsg_policy uci_band_metric_policy[__UCI_METRIC_MAX] = {
[UCI_FREQ] = {.name = "freq", .type = BLOBMSG_TYPE_INT32},
[UCI_INITIAL_SCORE] = {.name = "initial_score", .type = BLOBMSG_TYPE_INT32},
[UCI_HT_SUPPORT] = {.name = "ht_support", .type = BLOBMSG_TYPE_INT32},
[UCI_VHT_SUPPORT] = {.name = "vht_support", .type = BLOBMSG_TYPE_INT32},
[UCI_NO_HT_SUPPORT] = {.name = "no_ht_support", .type = BLOBMSG_TYPE_INT32},
@ -664,6 +668,8 @@ static const struct blobmsg_policy uci_band_metric_policy[__UCI_METRIC_MAX] = {
[UCI_MAX_CHAN_UTIL] = {.name = "max_chan_util", .type = BLOBMSG_TYPE_INT32},
[UCI_CHAN_UTIL_VAL] = {.name = "chan_util_val", .type = BLOBMSG_TYPE_INT32},
[UCI_MAX_CHAN_UTIL_VAL] = {.name = "max_chan_util_val", .type = BLOBMSG_TYPE_INT32},
[UCI_RSSI_WEIGHT] = {.name = "rssi_weight", .type = BLOBMSG_TYPE_INT32},
[UCI_RSSI_CENTER] = {.name = "rssi_center", .type = BLOBMSG_TYPE_INT32},
};
static const struct blobmsg_policy uci_times_policy[__UCI_TIMES_MAX] = {
@ -723,6 +729,9 @@ static int handle_uci_config(struct blob_attr* msg) {
sprintf(cmd_buffer, "dawn.global.kicking=%d", blobmsg_get_u32(tb_metric[UCI_KICKING]));
uci_set_network(cmd_buffer);
sprintf(cmd_buffer, "dawn.global.kicking_threshold=%d", blobmsg_get_u32(tb_metric[UCI_KICKING_THRESHOLD]));
uci_set_network(cmd_buffer);
sprintf(cmd_buffer, "dawn.global.deny_auth_reason=%d", blobmsg_get_u32(tb_metric[UCI_DENY_AUTH_REASON]));
uci_set_network(cmd_buffer);
@ -770,7 +779,7 @@ static int handle_uci_config(struct blob_attr* msg) {
sprintf(cmd_buffer, "dawn.%s=metric", band_name);
uci_set_network(cmd_buffer);
sprintf(cmd_buffer, "dawn.%s.freq=%d", band_name, blobmsg_get_u32(tb_band_metric[UCI_FREQ]));
sprintf(cmd_buffer, "dawn.%s.initial_score=%d", band_name, blobmsg_get_u32(tb_band_metric[UCI_INITIAL_SCORE]));
uci_set_network(cmd_buffer);
sprintf(cmd_buffer, "dawn.%s.ht_support=%d", band_name, blobmsg_get_u32(tb_band_metric[UCI_HT_SUPPORT]));
@ -808,6 +817,12 @@ static int handle_uci_config(struct blob_attr* msg) {
sprintf(cmd_buffer, "dawn.%s.max_chan_util_val=%d", band_name, blobmsg_get_u32(tb_band_metric[UCI_MAX_CHAN_UTIL_VAL]));
uci_set_network(cmd_buffer);
sprintf(cmd_buffer, "dawn.%s.rssi_weight=%d", band_name, blobmsg_get_u32(tb_band_metric[UCI_RSSI_WEIGHT]));
uci_set_network(cmd_buffer);
sprintf(cmd_buffer, "dawn.%s.rssi_center=%d", band_name, blobmsg_get_u32(tb_band_metric[UCI_RSSI_CENTER]));
uci_set_network(cmd_buffer);
}
struct blob_attr* tb_times[__UCI_TIMES_MAX];