1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) 2022 David Bauer <mail@david-bauer.net>
*/
#include "usteer.h"
#include "node.h"
void usteer_band_steering_sta_update(struct sta_info *si)
{
if (si->signal < usteer_snr_to_signal(si->node, config.band_steering_min_snr))
si->band_steering.below_snr = true;
}
bool usteer_band_steering_is_target(struct usteer_local_node *ln, struct usteer_node *node)
{
if (&ln->node == node)
return false;
if (strcmp(ln->node.ssid, node->ssid))
return false;
if (node->freq < 4000)
return false;
if (!usteer_policy_node_below_max_assoc(node))
return false;
/* ToDo: Skip nodes with active load-kick */
return true;
}
static bool usteer_band_steering_has_target_iface(struct usteer_local_node *ln)
{
struct usteer_node *node;
for_each_local_node(node) {
if (usteer_band_steering_is_target(ln, node))
return true;
}
return false;
}
void usteer_band_steering_perform_steer(struct usteer_local_node *ln)
{
unsigned int min_count = DIV_ROUND_UP(config.band_steering_interval, config.local_sta_update);
struct sta_info *si;
if (!config.band_steering_interval)
return;
/* Band-Steering is only available on 2.4 GHz interfaces */
if (ln->node.freq > 4000)
return;
/* Check if we have an interface we can steer to */
if (!usteer_band_steering_has_target_iface(ln))
return;
/* Only steer every interval */
if (ln->band_steering_interval < min_count) {
ln->band_steering_interval++;
return;
}
ln->band_steering_interval = 0;
list_for_each_entry(si, &ln->node.sta_info, node_list) {
/* Check if client is eligable to be steerd */
if (!usteer_policy_can_perform_roam(si))
continue;
/* Skip clients with insufficient SNR-state */
if (si->band_steering.below_snr) {
si->band_steering.below_snr = false;
continue;
}
if (si->bss_transition)
usteer_ubus_band_steering_request(si);
si->band_steering.below_snr = false;
}
}
|
