path: root/drivers/net/wireless/ath/ath6kl/main.c

/*
 * Copyright (c) 2004-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "core.h"
#include "hif-ops.h"
#include "cfg80211.h"
#include "target.h"
#include "debug.h"

struct ath6kl_sta *ath6kl_find_sta(struct ath6kl_vif *vif, u8 *node_addr)
{
	struct ath6kl *ar = vif->ar;
	struct ath6kl_sta *conn = NULL;
	u8 i, max_conn;

	max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;

	for (i = 0; i < max_conn; i++) {
		if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
			conn = &ar->sta_list[i];
			break;
		}
	}

	return conn;
}

struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
{
	struct ath6kl_sta *conn = NULL;
	u8 ctr;

	for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
		if (ar->sta_list[ctr].aid == aid) {
			conn = &ar->sta_list[ctr];
			break;
		}
	}
	return conn;
}

static void ath6kl_add_new_sta(struct ath6kl_vif *vif, u8 *mac, u16 aid,
			       u8 *wpaie, size_t ielen, u8 keymgmt,
			       u8 ucipher, u8 auth, u8 apsd_info)
{
	struct ath6kl *ar = vif->ar;
	struct ath6kl_sta *sta;
	u8 free_slot;

	free_slot = aid - 1;

	sta = &ar->sta_list[free_slot];
	memcpy(sta->mac, mac, ETH_ALEN);
	if (ielen <= ATH6KL_MAX_IE)
		memcpy(sta->wpa_ie, wpaie, ielen);
	sta->aid = aid;
	sta->keymgmt = keymgmt;
	sta->ucipher = ucipher;
	sta->auth = auth;
	sta->apsd_info = apsd_info;

	ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
	ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
	aggr_conn_init(vif, vif->aggr_cntxt, sta->aggr_conn);
}

static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
{
	struct ath6kl_sta *sta = &ar->sta_list[i];
	struct ath6kl_mgmt_buff *entry, *tmp;

	/* empty the queued pkts in the PS queue if any */
	spin_lock_bh(&sta->psq_lock);
	skb_queue_purge(&sta->psq);
	skb_queue_purge(&sta->apsdq);

	if (sta->mgmt_psq_len != 0) {
		list_for_each_entry_safe(entry, tmp, &sta->mgmt_psq, list) {
			kfree(entry);
		}
		INIT_LIST_HEAD(&sta->mgmt_psq);
		sta->mgmt_psq_len = 0;
	}

	spin_unlock_bh(&sta->psq_lock);

	memset(&ar->ap_stats.sta[sta->aid - 1], 0,
	       sizeof(struct wmi_per_sta_stat));
	memset(sta->mac, 0, ETH_ALEN);
	memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
	sta->aid = 0;
	sta->sta_flags = 0;

	ar->sta_list_index = ar->sta_list_index & ~(1 << i);
	aggr_reset_state(sta->aggr_conn);
}

static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
{
	u8 i, removed = 0;

	if (is_zero_ether_addr(mac))
		return removed;

	if (is_broadcast_ether_addr(mac)) {
		ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");

		for (i = 0; i < AP_MAX_NUM_STA; i++) {
			if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
				ath6kl_sta_cleanup(ar, i);
				removed = 1;
			}
		}
	} else {
		for (i = 0; i < AP_MAX_NUM_STA; i++) {
			if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
				ath6kl_dbg(ATH6KL_DBG_TRC,
					   "deleting station %pM aid=%d reason=%d\n",
					   mac