aadc562dcb
Usteer imposes minimum intervals for steering actions in order to avoid creating endless roam-kick loops due to the decentral aspect of usteer. Make these basic limits to roamsteering usable across band-steering and signal-based roam-steering. Signed-off-by: David Bauer <mail@david-bauer.net>
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) 2022 David Bauer <mail@david-bauer.net>
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*/
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#include "usteer.h"
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#include "node.h"
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void usteer_band_steering_sta_update(struct sta_info *si)
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{
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if (si->signal < usteer_snr_to_signal(si->node, config.band_steering_min_snr))
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si->band_steering.below_snr = true;
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}
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bool usteer_band_steering_is_target(struct usteer_local_node *ln, struct usteer_node *node)
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{
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if (&ln->node == node)
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return false;
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if (strcmp(ln->node.ssid, node->ssid))
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return false;
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if (node->freq < 4000)
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return false;
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if (!usteer_policy_node_below_max_assoc(node))
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return false;
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/* ToDo: Skip nodes with active load-kick */
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return true;
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}
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static bool usteer_band_steering_has_target_iface(struct usteer_local_node *ln)
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{
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struct usteer_node *node;
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for_each_local_node(node) {
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if (usteer_band_steering_is_target(ln, node))
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return true;
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}
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return false;
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}
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void usteer_band_steering_perform_steer(struct usteer_local_node *ln)
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{
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unsigned int min_count = DIV_ROUND_UP(config.band_steering_interval, config.local_sta_update);
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struct sta_info *si;
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if (!config.band_steering_interval)
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return;
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/* Band-Steering is only available on 2.4 GHz interfaces */
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if (ln->node.freq > 4000)
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return;
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/* Check if we have an interface we can steer to */
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if (!usteer_band_steering_has_target_iface(ln))
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return;
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/* Only steer every interval */
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if (ln->band_steering_interval < min_count) {
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ln->band_steering_interval++;
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return;
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}
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ln->band_steering_interval = 0;
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list_for_each_entry(si, &ln->node.sta_info, node_list) {
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/* Check if client is eligable to be steerd */
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if (!usteer_policy_can_perform_roam(si))
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continue;
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/* Skip clients with insufficient SNR-state */
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if (si->band_steering.below_snr) {
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si->band_steering.below_snr = false;
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continue;
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}
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if (si->bss_transition)
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usteer_ubus_band_steering_request(si);
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si->band_steering.below_snr = false;
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}
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} |