115 lines
2.3 KiB
C
115 lines
2.3 KiB
C
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/*
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* Copyright (c) 2015-2016 Quantenna Communications, Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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*/
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#include "util.h"
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void qtnf_sta_list_init(struct qtnf_sta_list *list)
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{
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if (unlikely(!list))
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return;
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INIT_LIST_HEAD(&list->head);
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atomic_set(&list->size, 0);
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}
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struct qtnf_sta_node *qtnf_sta_list_lookup(struct qtnf_sta_list *list,
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const u8 *mac)
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{
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struct qtnf_sta_node *node;
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if (unlikely(!mac))
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return NULL;
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list_for_each_entry(node, &list->head, list) {
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if (ether_addr_equal(node->mac_addr, mac))
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return node;
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}
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return NULL;
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}
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struct qtnf_sta_node *qtnf_sta_list_lookup_index(struct qtnf_sta_list *list,
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size_t index)
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{
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struct qtnf_sta_node *node;
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if (qtnf_sta_list_size(list) <= index)
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return NULL;
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list_for_each_entry(node, &list->head, list) {
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if (index-- == 0)
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return node;
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}
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return NULL;
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}
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struct qtnf_sta_node *qtnf_sta_list_add(struct qtnf_sta_list *list,
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const u8 *mac)
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{
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struct qtnf_sta_node *node;
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if (unlikely(!mac))
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return NULL;
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node = qtnf_sta_list_lookup(list, mac);
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if (node)
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goto done;
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node = kzalloc(sizeof(*node), GFP_KERNEL);
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if (unlikely(!node))
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goto done;
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ether_addr_copy(node->mac_addr, mac);
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list_add_tail(&node->list, &list->head);
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atomic_inc(&list->size);
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done:
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return node;
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}
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bool qtnf_sta_list_del(struct qtnf_sta_list *list, const u8 *mac)
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{
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struct qtnf_sta_node *node;
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bool ret = false;
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node = qtnf_sta_list_lookup(list, mac);
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if (node) {
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list_del(&node->list);
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atomic_dec(&list->size);
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kfree(node);
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ret = true;
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}
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return ret;
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}
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void qtnf_sta_list_free(struct qtnf_sta_list *list)
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{
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struct qtnf_sta_node *node, *tmp;
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atomic_set(&list->size, 0);
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list_for_each_entry_safe(node, tmp, &list->head, list) {
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list_del(&node->list);
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kfree(node);
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}
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INIT_LIST_HEAD(&list->head);
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}
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