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@@ -0,0 +1,902 @@
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+/*
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+ * mac80211 work implementation
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+ *
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+ * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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+ * Copyright 2004, Instant802 Networks, Inc.
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+ * Copyright 2005, Devicescape Software, Inc.
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+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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+ * Copyright 2009, Johannes Berg <johannes@sipsolutions.net>
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+ *
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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 version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/delay.h>
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+#include <linux/if_ether.h>
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+#include <linux/skbuff.h>
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+#include <linux/if_arp.h>
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+#include <linux/etherdevice.h>
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+#include <linux/crc32.h>
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+#include <net/mac80211.h>
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+#include <asm/unaligned.h>
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+
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+#include "ieee80211_i.h"
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+#include "rate.h"
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+
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+#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
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+#define IEEE80211_AUTH_MAX_TRIES 3
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+#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
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+#define IEEE80211_ASSOC_MAX_TRIES 3
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+#define IEEE80211_MAX_PROBE_TRIES 5
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+
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+enum work_action {
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+ WORK_ACT_NONE,
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+ WORK_ACT_TIMEOUT,
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+ WORK_ACT_DONE,
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+};
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+
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+
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+/* utils */
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+static inline void ASSERT_WORK_MTX(struct ieee80211_local *local)
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+{
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+ WARN_ON(!mutex_is_locked(&local->work_mtx));
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+}
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+
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+/*
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+ * We can have multiple work items (and connection probing)
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+ * scheduling this timer, but we need to take care to only
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+ * reschedule it when it should fire _earlier_ than it was
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+ * asked for before, or if it's not pending right now. This
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+ * function ensures that. Note that it then is required to
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+ * run this function for all timeouts after the first one
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+ * has happened -- the work that runs from this timer will
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+ * do that.
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+ */
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+static void run_again(struct ieee80211_local *local,
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+ unsigned long timeout)
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+{
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+ ASSERT_WORK_MTX(local);
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+
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+ if (!timer_pending(&local->work_timer) ||
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+ time_before(timeout, local->work_timer.expires))
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+ mod_timer(&local->work_timer, timeout);
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+}
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+
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+static void work_free_rcu(struct rcu_head *head)
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+{
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+ struct ieee80211_work *wk =
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+ container_of(head, struct ieee80211_work, rcu_head);
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+
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+ kfree(wk);
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+}
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+
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+void free_work(struct ieee80211_work *wk)
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+{
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+ call_rcu(&wk->rcu_head, work_free_rcu);
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+}
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+
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+static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
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+ struct ieee80211_supported_band *sband,
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+ u32 *rates)
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+{
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+ int i, j, count;
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+ *rates = 0;
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+ count = 0;
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+ for (i = 0; i < supp_rates_len; i++) {
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+ int rate = (supp_rates[i] & 0x7F) * 5;
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+
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+ for (j = 0; j < sband->n_bitrates; j++)
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+ if (sband->bitrates[j].bitrate == rate) {
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+ *rates |= BIT(j);
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+ count++;
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+ break;
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+ }
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+ }
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+
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+ return count;
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+}
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+
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+/* frame sending functions */
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+
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+static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
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+ struct ieee80211_work *wk)
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+{
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+ struct ieee80211_local *local = sdata->local;
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+ struct sk_buff *skb;
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+ struct ieee80211_mgmt *mgmt;
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+ u8 *pos;
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+ const u8 *ies, *ht_ie;
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+ int i, len, count, rates_len, supp_rates_len;
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+ u16 capab;
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+ struct ieee80211_supported_band *sband;
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+ u32 rates = 0;
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+
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+ skb = dev_alloc_skb(local->hw.extra_tx_headroom +
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+ sizeof(*mgmt) + 200 + wk->ie_len +
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+ wk->assoc.ssid_len);
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+ if (!skb) {
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+ printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
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+ "frame\n", sdata->name);
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+ return;
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+ }
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+ skb_reserve(skb, local->hw.extra_tx_headroom);
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+
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+ sband = local->hw.wiphy->bands[wk->chan->band];
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+
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+ capab = WLAN_CAPABILITY_ESS;
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+
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+ if (sband->band == IEEE80211_BAND_2GHZ) {
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+ if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
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+ capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
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+ if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
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+ capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
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+ }
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+
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+ if (wk->assoc.capability & WLAN_CAPABILITY_PRIVACY)
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+ capab |= WLAN_CAPABILITY_PRIVACY;
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+
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+ /*
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+ * Get all rates supported by the device and the AP as
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+ * some APs don't like getting a superset of their rates
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+ * in the association request (e.g. D-Link DAP 1353 in
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+ * b-only mode)...
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+ */
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+ rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates,
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+ wk->assoc.supp_rates_len,
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+ sband, &rates);
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+
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+ if ((wk->assoc.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
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+ (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
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+ capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
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+
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+ mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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+ memset(mgmt, 0, 24);
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+ memcpy(mgmt->da, wk->filter_ta, ETH_ALEN);
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+ memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
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+ memcpy(mgmt->bssid, wk->filter_ta, ETH_ALEN);
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+
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+ if (!is_zero_ether_addr(wk->assoc.prev_bssid)) {
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+ skb_put(skb, 10);
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+ mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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+ IEEE80211_STYPE_REASSOC_REQ);
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+ mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
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+ mgmt->u.reassoc_req.listen_interval =
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+ cpu_to_le16(local->hw.conf.listen_interval);
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+ memcpy(mgmt->u.reassoc_req.current_ap, wk->assoc.prev_bssid,
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+ ETH_ALEN);
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+ } else {
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+ skb_put(skb, 4);
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+ mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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+ IEEE80211_STYPE_ASSOC_REQ);
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+ mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
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+ mgmt->u.assoc_req.listen_interval =
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+ cpu_to_le16(local->hw.conf.listen_interval);
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+ }
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+
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+ /* SSID */
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+ ies = pos = skb_put(skb, 2 + wk->assoc.ssid_len);
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+ *pos++ = WLAN_EID_SSID;
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+ *pos++ = wk->assoc.ssid_len;
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+ memcpy(pos, wk->assoc.ssid, wk->assoc.ssid_len);
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+
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+ /* add all rates which were marked to be used above */
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+ supp_rates_len = rates_len;
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+ if (supp_rates_len > 8)
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+ supp_rates_len = 8;
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+
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+ len = sband->n_bitrates;
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+ pos = skb_put(skb, supp_rates_len + 2);
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+ *pos++ = WLAN_EID_SUPP_RATES;
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+ *pos++ = supp_rates_len;
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+
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+ count = 0;
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+ for (i = 0; i < sband->n_bitrates; i++) {
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+ if (BIT(i) & rates) {
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+ int rate = sband->bitrates[i].bitrate;
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+ *pos++ = (u8) (rate / 5);
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+ if (++count == 8)
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+ break;
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+ }
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+ }
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+
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+ if (rates_len > count) {
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+ pos = skb_put(skb, rates_len - count + 2);
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+ *pos++ = WLAN_EID_EXT_SUPP_RATES;
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+ *pos++ = rates_len - count;
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+
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+ for (i++; i < sband->n_bitrates; i++) {
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+ if (BIT(i) & rates) {
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+ int rate = sband->bitrates[i].bitrate;
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+ *pos++ = (u8) (rate / 5);
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+ }
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+ }
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+ }
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+
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+ if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
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+ /* 1. power capabilities */
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+ pos = skb_put(skb, 4);
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+ *pos++ = WLAN_EID_PWR_CAPABILITY;
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+ *pos++ = 2;
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+ *pos++ = 0; /* min tx power */
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+ *pos++ = local->hw.conf.channel->max_power; /* max tx power */
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+
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+ /* 2. supported channels */
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+ /* TODO: get this in reg domain format */
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+ pos = skb_put(skb, 2 * sband->n_channels + 2);
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+ *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
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+ *pos++ = 2 * sband->n_channels;
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+ for (i = 0; i < sband->n_channels; i++) {
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+ *pos++ = ieee80211_frequency_to_channel(
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+ sband->channels[i].center_freq);
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+ *pos++ = 1; /* one channel in the subband*/
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+ }
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+ }
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+
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+ if (wk->ie_len && wk->ie) {
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+ pos = skb_put(skb, wk->ie_len);
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+ memcpy(pos, wk->ie, wk->ie_len);
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+ }
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+
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+ if (wk->assoc.wmm_used && local->hw.queues >= 4) {
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+ pos = skb_put(skb, 9);
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+ *pos++ = WLAN_EID_VENDOR_SPECIFIC;
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+ *pos++ = 7; /* len */
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+ *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
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+ *pos++ = 0x50;
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+ *pos++ = 0xf2;
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+ *pos++ = 2; /* WME */
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+ *pos++ = 0; /* WME info */
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+ *pos++ = 1; /* WME ver */
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+ *pos++ = 0;
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+ }
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+
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+ /* wmm support is a must to HT */
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+ /*
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+ * IEEE802.11n does not allow TKIP/WEP as pairwise
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+ * ciphers in HT mode. We still associate in non-ht
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+ * mode (11a/b/g) if any one of these ciphers is
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+ * configured as pairwise.
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+ */
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+ if (wk->assoc.use_11n && wk->assoc.wmm_used &&
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+ (local->hw.queues >= 4) &&
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+ sband->ht_cap.ht_supported &&
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+ (ht_ie = wk->assoc.ht_information_ie) &&
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+ ht_ie[1] >= sizeof(struct ieee80211_ht_info)) {
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+ struct ieee80211_ht_info *ht_info =
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+ (struct ieee80211_ht_info *)(ht_ie + 2);
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+ u16 cap = sband->ht_cap.cap;
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+ __le16 tmp;
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+ u32 flags = local->hw.conf.channel->flags;
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+
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+ /* determine capability flags */
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+
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+ if (ieee80211_disable_40mhz_24ghz &&
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+ sband->band == IEEE80211_BAND_2GHZ) {
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+ cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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+ cap &= ~IEEE80211_HT_CAP_SGI_40;
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+ }
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+
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+ switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
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+ case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
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+ if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
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+ cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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+ cap &= ~IEEE80211_HT_CAP_SGI_40;
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+ }
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+ break;
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+ case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
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+ if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
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+ cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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+ cap &= ~IEEE80211_HT_CAP_SGI_40;
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+ }
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+ break;
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+ }
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+
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+ /* set SM PS mode properly */
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+ cap &= ~IEEE80211_HT_CAP_SM_PS;
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+ switch (wk->assoc.smps) {
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+ case IEEE80211_SMPS_AUTOMATIC:
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+ case IEEE80211_SMPS_NUM_MODES:
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+ WARN_ON(1);
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+ case IEEE80211_SMPS_OFF:
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+ cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
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+ IEEE80211_HT_CAP_SM_PS_SHIFT;
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+ break;
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+ case IEEE80211_SMPS_STATIC:
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+ cap |= WLAN_HT_CAP_SM_PS_STATIC <<
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+ IEEE80211_HT_CAP_SM_PS_SHIFT;
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+ break;
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+ case IEEE80211_SMPS_DYNAMIC:
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+ cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
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+ IEEE80211_HT_CAP_SM_PS_SHIFT;
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+ break;
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+ }
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+
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+ /* reserve and fill IE */
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+
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+ pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
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+ *pos++ = WLAN_EID_HT_CAPABILITY;
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+ *pos++ = sizeof(struct ieee80211_ht_cap);
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+ memset(pos, 0, sizeof(struct ieee80211_ht_cap));
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+
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+ /* capability flags */
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+ tmp = cpu_to_le16(cap);
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+ memcpy(pos, &tmp, sizeof(u16));
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+ pos += sizeof(u16);
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+
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+ /* AMPDU parameters */
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+ *pos++ = sband->ht_cap.ampdu_factor |
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+ (sband->ht_cap.ampdu_density <<
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+ IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
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+
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+ /* MCS set */
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+ memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
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+ pos += sizeof(sband->ht_cap.mcs);
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+
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+ /* extended capabilities */
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+ pos += sizeof(__le16);
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+
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+ /* BF capabilities */
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+ pos += sizeof(__le32);
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+
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+ /* antenna selection */
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+ pos += sizeof(u8);
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+ }
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+
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+ IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
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+ ieee80211_tx_skb(sdata, skb);
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+}
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+
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+static void ieee80211_remove_auth_bss(struct ieee80211_local *local,
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+ struct ieee80211_work *wk)
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+{
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+ struct cfg80211_bss *cbss;
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+ u16 capa_val = WLAN_CAPABILITY_ESS;
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+
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+ if (wk->probe_auth.privacy)
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+ capa_val |= WLAN_CAPABILITY_PRIVACY;
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+
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+ cbss = cfg80211_get_bss(local->hw.wiphy, wk->chan, wk->filter_ta,
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+ wk->probe_auth.ssid, wk->probe_auth.ssid_len,
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+ WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
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+ capa_val);
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+ if (!cbss)
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+ return;
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+
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+ cfg80211_unlink_bss(local->hw.wiphy, cbss);
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+ cfg80211_put_bss(cbss);
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+}
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+
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+static enum work_action __must_check
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+ieee80211_direct_probe(struct ieee80211_work *wk)
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+{
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+ struct ieee80211_sub_if_data *sdata = wk->sdata;
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+ struct ieee80211_local *local = sdata->local;
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+
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+ wk->probe_auth.tries++;
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+ if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) {
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|
|
+ printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
|
|
|
+ sdata->name, wk->filter_ta);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Most likely AP is not in the range so remove the
|
|
|
+ * bss struct for that AP.
|
|
|
+ */
|
|
|
+ ieee80211_remove_auth_bss(local, wk);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We might have a pending scan which had no chance to run yet
|
|
|
+ * due to work needing to be done. Hence, queue the STAs work
|
|
|
+ * again for that.
|
|
|
+ */
|
|
|
+ ieee80211_queue_work(&local->hw, &local->work_work);
|
|
|
+ return WORK_ACT_TIMEOUT;
|
|
|
+ }
|
|
|
+
|
|
|
+ printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
|
|
|
+ sdata->name, wk->filter_ta, wk->probe_auth.tries);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Direct probe is sent to broadcast address as some APs
|
|
|
+ * will not answer to direct packet in unassociated state.
|
|
|
+ */
|
|
|
+ ieee80211_send_probe_req(sdata, NULL, wk->probe_auth.ssid,
|
|
|
+ wk->probe_auth.ssid_len, NULL, 0);
|
|
|
+
|
|
|
+ wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
|
|
|
+ run_again(local, wk->timeout);
|
|
|
+
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static enum work_action __must_check
|
|
|
+ieee80211_authenticate(struct ieee80211_work *wk)
|
|
|
+{
|
|
|
+ struct ieee80211_sub_if_data *sdata = wk->sdata;
|
|
|
+ struct ieee80211_local *local = sdata->local;
|
|
|
+
|
|
|
+ wk->probe_auth.tries++;
|
|
|
+ if (wk->probe_auth.tries > IEEE80211_AUTH_MAX_TRIES) {
|
|
|
+ printk(KERN_DEBUG "%s: authentication with AP %pM"
|
|
|
+ " timed out\n", sdata->name, wk->filter_ta);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Most likely AP is not in the range so remove the
|
|
|
+ * bss struct for that AP.
|
|
|
+ */
|
|
|
+ ieee80211_remove_auth_bss(local, wk);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We might have a pending scan which had no chance to run yet
|
|
|
+ * due to work needing to be done. Hence, queue the STAs work
|
|
|
+ * again for that.
|
|
|
+ */
|
|
|
+ ieee80211_queue_work(&local->hw, &local->work_work);
|
|
|
+ return WORK_ACT_TIMEOUT;
|
|
|
+ }
|
|
|
+
|
|
|
+ printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
|
|
|
+ sdata->name, wk->filter_ta, wk->probe_auth.tries);
|
|
|
+
|
|
|
+ ieee80211_send_auth(sdata, 1, wk->probe_auth.algorithm, wk->ie,
|
|
|
+ wk->ie_len, wk->filter_ta, NULL, 0, 0);
|
|
|
+ wk->probe_auth.transaction = 2;
|
|
|
+
|
|
|
+ wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
|
|
|
+ run_again(local, wk->timeout);
|
|
|
+
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+}
|
|
|
+
|
|
|
+static enum work_action __must_check
|
|
|
+ieee80211_associate(struct ieee80211_work *wk)
|
|
|
+{
|
|
|
+ struct ieee80211_sub_if_data *sdata = wk->sdata;
|
|
|
+ struct ieee80211_local *local = sdata->local;
|
|
|
+
|
|
|
+ wk->assoc.tries++;
|
|
|
+ if (wk->assoc.tries > IEEE80211_ASSOC_MAX_TRIES) {
|
|
|
+ printk(KERN_DEBUG "%s: association with AP %pM"
|
|
|
+ " timed out\n",
|
|
|
+ sdata->name, wk->filter_ta);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Most likely AP is not in the range so remove the
|
|
|
+ * bss struct for that AP.
|
|
|
+ */
|
|
|
+ if (wk->assoc.bss)
|
|
|
+ cfg80211_unlink_bss(local->hw.wiphy,
|
|
|
+ &wk->assoc.bss->cbss);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We might have a pending scan which had no chance to run yet
|
|
|
+ * due to work needing to be done. Hence, queue the STAs work
|
|
|
+ * again for that.
|
|
|
+ */
|
|
|
+ ieee80211_queue_work(&local->hw, &local->work_work);
|
|
|
+ return WORK_ACT_TIMEOUT;
|
|
|
+ }
|
|
|
+
|
|
|
+ printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
|
|
|
+ sdata->name, wk->filter_ta, wk->assoc.tries);
|
|
|
+ ieee80211_send_assoc(sdata, wk);
|
|
|
+
|
|
|
+ wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
|
|
|
+ run_again(local, wk->timeout);
|
|
|
+
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+}
|
|
|
+
|
|
|
+static void ieee80211_auth_challenge(struct ieee80211_work *wk,
|
|
|
+ struct ieee80211_mgmt *mgmt,
|
|
|
+ size_t len)
|
|
|
+{
|
|
|
+ struct ieee80211_sub_if_data *sdata = wk->sdata;
|
|
|
+ u8 *pos;
|
|
|
+ struct ieee802_11_elems elems;
|
|
|
+
|
|
|
+ pos = mgmt->u.auth.variable;
|
|
|
+ ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
|
+ if (!elems.challenge)
|
|
|
+ return;
|
|
|
+ ieee80211_send_auth(sdata, 3, wk->probe_auth.algorithm,
|
|
|
+ elems.challenge - 2, elems.challenge_len + 2,
|
|
|
+ wk->filter_ta, wk->probe_auth.key,
|
|
|
+ wk->probe_auth.key_len, wk->probe_auth.key_idx);
|
|
|
+ wk->probe_auth.transaction = 4;
|
|
|
+}
|
|
|
+
|
|
|
+static enum work_action __must_check
|
|
|
+ieee80211_rx_mgmt_auth(struct ieee80211_work *wk,
|
|
|
+ struct ieee80211_mgmt *mgmt, size_t len)
|
|
|
+{
|
|
|
+ u16 auth_alg, auth_transaction, status_code;
|
|
|
+
|
|
|
+ if (wk->type != IEEE80211_WORK_AUTH)
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+
|
|
|
+ if (len < 24 + 6)
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+
|
|
|
+ auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
|
|
|
+ auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
|
|
|
+ status_code = le16_to_cpu(mgmt->u.auth.status_code);
|
|
|
+
|
|
|
+ if (auth_alg != wk->probe_auth.algorithm ||
|
|
|
+ auth_transaction != wk->probe_auth.transaction)
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+
|
|
|
+ if (status_code != WLAN_STATUS_SUCCESS) {
|
|
|
+ printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
|
|
|
+ wk->sdata->name, mgmt->sa, status_code);
|
|
|
+ return WORK_ACT_DONE;
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (wk->probe_auth.algorithm) {
|
|
|
+ case WLAN_AUTH_OPEN:
|
|
|
+ case WLAN_AUTH_LEAP:
|
|
|
+ case WLAN_AUTH_FT:
|
|
|
+ break;
|
|
|
+ case WLAN_AUTH_SHARED_KEY:
|
|
|
+ if (wk->probe_auth.transaction != 4) {
|
|
|
+ ieee80211_auth_challenge(wk, mgmt, len);
|
|
|
+ /* need another frame */
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ WARN_ON(1);
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+ }
|
|
|
+
|
|
|
+ printk(KERN_DEBUG "%s: authenticated\n", wk->sdata->name);
|
|
|
+ return WORK_ACT_DONE;
|
|
|
+}
|
|
|
+
|
|
|
+static enum work_action __must_check
|
|
|
+ieee80211_rx_mgmt_assoc_resp(struct ieee80211_work *wk,
|
|
|
+ struct ieee80211_mgmt *mgmt, size_t len,
|
|
|
+ bool reassoc)
|
|
|
+{
|
|
|
+ struct ieee80211_sub_if_data *sdata = wk->sdata;
|
|
|
+ struct ieee80211_local *local = sdata->local;
|
|
|
+ u16 capab_info, status_code, aid;
|
|
|
+ struct ieee802_11_elems elems;
|
|
|
+ u8 *pos;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * AssocResp and ReassocResp have identical structure, so process both
|
|
|
+ * of them in this function.
|
|
|
+ */
|
|
|
+
|
|
|
+ if (len < 24 + 6)
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+
|
|
|
+ capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
|
|
|
+ status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
|
|
|
+ aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
|
|
|
+
|
|
|
+ printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
|
|
|
+ "status=%d aid=%d)\n",
|
|
|
+ sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
|
|
|
+ capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
|
|
|
+
|
|
|
+ pos = mgmt->u.assoc_resp.variable;
|
|
|
+ ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
|
|
+
|
|
|
+ if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
|
|
|
+ elems.timeout_int && elems.timeout_int_len == 5 &&
|
|
|
+ elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
|
|
|
+ u32 tu, ms;
|
|
|
+ tu = get_unaligned_le32(elems.timeout_int + 1);
|
|
|
+ ms = tu * 1024 / 1000;
|
|
|
+ printk(KERN_DEBUG "%s: AP rejected association temporarily; "
|
|
|
+ "comeback duration %u TU (%u ms)\n",
|
|
|
+ sdata->name, tu, ms);
|
|
|
+ wk->timeout = jiffies + msecs_to_jiffies(ms);
|
|
|
+ if (ms > IEEE80211_ASSOC_TIMEOUT)
|
|
|
+ run_again(local, wk->timeout);
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (status_code != WLAN_STATUS_SUCCESS)
|
|
|
+ printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
|
|
|
+ sdata->name, status_code);
|
|
|
+ else
|
|
|
+ printk(KERN_DEBUG "%s: associated\n", sdata->name);
|
|
|
+
|
|
|
+ return WORK_ACT_DONE;
|
|
|
+}
|
|
|
+
|
|
|
+static enum work_action __must_check
|
|
|
+ieee80211_rx_mgmt_probe_resp(struct ieee80211_work *wk,
|
|
|
+ struct ieee80211_mgmt *mgmt, size_t len,
|
|
|
+ struct ieee80211_rx_status *rx_status)
|
|
|
+{
|
|
|
+ struct ieee80211_sub_if_data *sdata = wk->sdata;
|
|
|
+ struct ieee80211_local *local = sdata->local;
|
|
|
+ size_t baselen;
|
|
|
+
|
|
|
+ ASSERT_WORK_MTX(local);
|
|
|
+
|
|
|
+ baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
|
|
|
+ if (baselen > len)
|
|
|
+ return WORK_ACT_NONE;
|
|
|
+
|
|
|
+ printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
|
|
|
+ return WORK_ACT_DONE;
|
|
|
+}
|
|
|
+
|
|
|
+static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local,
|
|
|
+ struct sk_buff *skb)
|
|
|
+{
|
|
|
+ struct ieee80211_rx_status *rx_status;
|
|
|
+ struct ieee80211_mgmt *mgmt;
|
|
|
+ struct ieee80211_work *wk;
|
|
|
+ enum work_action rma = WORK_ACT_NONE;
|
|
|
+ u16 fc;
|
|
|
+
|
|
|
+ rx_status = (struct ieee80211_rx_status *) skb->cb;
|
|
|
+ mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
|
+ fc = le16_to_cpu(mgmt->frame_control);
|
|
|
+
|
|
|
+ mutex_lock(&local->work_mtx);
|
|
|
+
|
|
|
+ list_for_each_entry(wk, &local->work_list, list) {
|
|
|
+ const u8 *bssid = NULL;
|
|
|
+
|
|
|
+ switch (wk->type) {
|
|
|
+ case IEEE80211_WORK_DIRECT_PROBE:
|
|
|
+ case IEEE80211_WORK_AUTH:
|
|
|
+ case IEEE80211_WORK_ASSOC:
|
|
|
+ bssid = wk->filter_ta;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Before queuing, we already verified mgmt->sa,
|
|
|
+ * so this is needed just for matching.
|
|
|
+ */
|
|
|
+ if (compare_ether_addr(bssid, mgmt->bssid))
|
|
|
+ continue;
|
|
|
+
|
|
|
+ switch (fc & IEEE80211_FCTL_STYPE) {
|
|
|
+ case IEEE80211_STYPE_PROBE_RESP:
|
|
|
+ rma = ieee80211_rx_mgmt_probe_resp(wk, mgmt, skb->len,
|
|
|
+ rx_status);
|
|
|
+ break;
|
|
|
+ case IEEE80211_STYPE_AUTH:
|
|
|
+ rma = ieee80211_rx_mgmt_auth(wk, mgmt, skb->len);
|
|
|
+ break;
|
|
|
+ case IEEE80211_STYPE_ASSOC_RESP:
|
|
|
+ rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt,
|
|
|
+ skb->len, false);
|
|
|
+ break;
|
|
|
+ case IEEE80211_STYPE_REASSOC_RESP:
|
|
|
+ rma = ieee80211_rx_mgmt_assoc_resp(wk, mgmt,
|
|
|
+ skb->len, true);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ WARN_ON(1);
|
|
|
+ }
|
|
|
+ /*
|
|
|
+ * We've processed this frame for that work, so it can't
|
|
|
+ * belong to another work struct.
|
|
|
+ * NB: this is also required for correctness for 'rma'!
|
|
|
+ */
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (rma) {
|
|
|
+ case WORK_ACT_NONE:
|
|
|
+ break;
|
|
|
+ case WORK_ACT_DONE:
|
|
|
+ list_del_rcu(&wk->list);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ WARN(1, "unexpected: %d", rma);
|
|
|
+ }
|
|
|
+
|
|
|
+ mutex_unlock(&local->work_mtx);
|
|
|
+
|
|
|
+ if (rma != WORK_ACT_DONE)
|
|
|
+ goto out;
|
|
|
+
|
|
|
+ switch (wk->done(wk, skb)) {
|
|
|
+ case WORK_DONE_DESTROY:
|
|
|
+ free_work(wk);
|
|
|
+ break;
|
|
|
+ case WORK_DONE_REQUEUE:
|
|
|
+ synchronize_rcu();
|
|
|
+ wk->timeout = jiffies; /* run again directly */
|
|
|
+ mutex_lock(&local->work_mtx);
|
|
|
+ list_add_tail(&wk->list, &local->work_list);
|
|
|
+ mutex_unlock(&local->work_mtx);
|
|
|
+ }
|
|
|
+
|
|
|
+ out:
|
|
|
+ kfree_skb(skb);
|
|
|
+}
|
|
|
+
|
|
|
+static void ieee80211_work_timer(unsigned long data)
|
|
|
+{
|
|
|
+ struct ieee80211_local *local = (void *) data;
|
|
|
+
|
|
|
+ if (local->quiescing)
|
|
|
+ return;
|
|
|
+
|
|
|
+ ieee80211_queue_work(&local->hw, &local->work_work);
|
|
|
+}
|
|
|
+
|
|
|
+static void ieee80211_work_work(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct ieee80211_local *local =
|
|
|
+ container_of(work, struct ieee80211_local, work_work);
|
|
|
+ struct sk_buff *skb;
|
|
|
+ struct ieee80211_work *wk, *tmp;
|
|
|
+ LIST_HEAD(free_work);
|
|
|
+ enum work_action rma;
|
|
|
+
|
|
|
+ if (local->scanning)
|
|
|
+ return;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * ieee80211_queue_work() should have picked up most cases,
|
|
|
+ * here we'll pick the the rest.
|
|
|
+ */
|
|
|
+ if (WARN(local->suspended, "work scheduled while going to suspend\n"))
|
|
|
+ return;
|
|
|
+
|
|
|
+ /* first process frames to avoid timing out while a frame is pending */
|
|
|
+ while ((skb = skb_dequeue(&local->work_skb_queue)))
|
|
|
+ ieee80211_work_rx_queued_mgmt(local, skb);
|
|
|
+
|
|
|
+ ieee80211_recalc_idle(local);
|
|
|
+
|
|
|
+ mutex_lock(&local->work_mtx);
|
|
|
+
|
|
|
+ list_for_each_entry_safe(wk, tmp, &local->work_list, list) {
|
|
|
+ if (time_is_after_jiffies(wk->timeout)) {
|
|
|
+ /*
|
|
|
+ * This work item isn't supposed to be worked on
|
|
|
+ * right now, but take care to adjust the timer
|
|
|
+ * properly.
|
|
|
+ */
|
|
|
+ run_again(local, wk->timeout);
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (wk->type) {
|
|
|
+ default:
|
|
|
+ WARN_ON(1);
|
|
|
+ /* nothing */
|
|
|
+ rma = WORK_ACT_NONE;
|
|
|
+ break;
|
|
|
+ case IEEE80211_WORK_DIRECT_PROBE:
|
|
|
+ rma = ieee80211_direct_probe(wk);
|
|
|
+ break;
|
|
|
+ case IEEE80211_WORK_AUTH:
|
|
|
+ rma = ieee80211_authenticate(wk);
|
|
|
+ break;
|
|
|
+ case IEEE80211_WORK_ASSOC:
|
|
|
+ rma = ieee80211_associate(wk);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (rma) {
|
|
|
+ case WORK_ACT_NONE:
|
|
|
+ /* no action required */
|
|
|
+ break;
|
|
|
+ case WORK_ACT_TIMEOUT:
|
|
|
+ list_del_rcu(&wk->list);
|
|
|
+ synchronize_rcu();
|
|
|
+ list_add(&wk->list, &free_work);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ WARN(1, "unexpected: %d", rma);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (list_empty(&local->work_list) && local->scan_req)
|
|
|
+ ieee80211_queue_delayed_work(&local->hw,
|
|
|
+ &local->scan_work,
|
|
|
+ round_jiffies_relative(0));
|
|
|
+
|
|
|
+ mutex_unlock(&local->work_mtx);
|
|
|
+
|
|
|
+ list_for_each_entry_safe(wk, tmp, &free_work, list) {
|
|
|
+ wk->done(wk, NULL);
|
|
|
+ list_del(&wk->list);
|
|
|
+ kfree(wk);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+void ieee80211_add_work(struct ieee80211_work *wk)
|
|
|
+{
|
|
|
+ struct ieee80211_local *local;
|
|
|
+
|
|
|
+ if (WARN_ON(!wk->chan))
|
|
|
+ return;
|
|
|
+
|
|
|
+ if (WARN_ON(!wk->sdata))
|
|
|
+ return;
|
|
|
+
|
|
|
+ if (WARN_ON(!wk->done))
|
|
|
+ return;
|
|
|
+
|
|
|
+ wk->timeout = jiffies;
|
|
|
+
|
|
|
+ local = wk->sdata->local;
|
|
|
+ mutex_lock(&local->work_mtx);
|
|
|
+ list_add_tail(&wk->list, &local->work_list);
|
|
|
+ mutex_unlock(&local->work_mtx);
|
|
|
+
|
|
|
+ ieee80211_queue_work(&local->hw, &local->work_work);
|
|
|
+}
|
|
|
+
|
|
|
+void ieee80211_work_init(struct ieee80211_local *local)
|
|
|
+{
|
|
|
+ mutex_init(&local->work_mtx);
|
|
|
+ INIT_LIST_HEAD(&local->work_list);
|
|
|
+ setup_timer(&local->work_timer, ieee80211_work_timer,
|
|
|
+ (unsigned long)local);
|
|
|
+ INIT_WORK(&local->work_work, ieee80211_work_work);
|
|
|
+ skb_queue_head_init(&local->work_skb_queue);
|
|
|
+}
|
|
|
+
|
|
|
+void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata)
|
|
|
+{
|
|
|
+ struct ieee80211_local *local = sdata->local;
|
|
|
+ struct ieee80211_work *wk, *tmp;
|
|
|
+
|
|
|
+ mutex_lock(&local->work_mtx);
|
|
|
+ list_for_each_entry_safe(wk, tmp, &local->work_list, list) {
|
|
|
+ if (wk->sdata != sdata)
|
|
|
+ continue;
|
|
|
+ list_del(&wk->list);
|
|
|
+ free_work(wk);
|
|
|
+ }
|
|
|
+ mutex_unlock(&local->work_mtx);
|
|
|
+}
|
|
|
+
|
|
|
+ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
|
+ struct sk_buff *skb)
|
|
|
+{
|
|
|
+ struct ieee80211_local *local = sdata->local;
|
|
|
+ struct ieee80211_mgmt *mgmt;
|
|
|
+ struct ieee80211_work *wk;
|
|
|
+ u16 fc;
|
|
|
+
|
|
|
+ if (skb->len < 24)
|
|
|
+ return RX_DROP_MONITOR;
|
|
|
+
|
|
|
+ mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
|
+ fc = le16_to_cpu(mgmt->frame_control);
|
|
|
+
|
|
|
+ list_for_each_entry_rcu(wk, &local->work_list, list) {
|
|
|
+ if (sdata != wk->sdata)
|
|
|
+ continue;
|
|
|
+ if (compare_ether_addr(wk->filter_ta, mgmt->sa))
|
|
|
+ continue;
|
|
|
+ if (compare_ether_addr(wk->filter_ta, mgmt->bssid))
|
|
|
+ continue;
|
|
|
+
|
|
|
+ switch (fc & IEEE80211_FCTL_STYPE) {
|
|
|
+ case IEEE80211_STYPE_AUTH:
|
|
|
+ case IEEE80211_STYPE_PROBE_RESP:
|
|
|
+ case IEEE80211_STYPE_ASSOC_RESP:
|
|
|
+ case IEEE80211_STYPE_REASSOC_RESP:
|
|
|
+ case IEEE80211_STYPE_DEAUTH:
|
|
|
+ case IEEE80211_STYPE_DISASSOC:
|
|
|
+ skb_queue_tail(&local->work_skb_queue, skb);
|
|
|
+ ieee80211_queue_work(&local->hw, &local->work_work);
|
|
|
+ return RX_QUEUED;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return RX_CONTINUE;
|
|
|
+}
|
Johannes Berg