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-rw-r--r--net/mac80211/util.c451
1 files changed, 333 insertions, 118 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index fdf432f1455..66ce96a69f3 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -20,27 +20,21 @@
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/bitmap.h>
+#include <linux/crc32.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include "ieee80211_i.h"
+#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wme.h"
+#include "led.h"
/* privid for wiphys to determine whether they belong to us or not */
void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
-/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
-/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
-const unsigned char rfc1042_header[] __aligned(2) =
- { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
-
-/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
-const unsigned char bridge_tunnel_header[] __aligned(2) =
- { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
-
struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
{
struct ieee80211_local *local;
@@ -100,70 +94,6 @@ u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
return NULL;
}
-unsigned int ieee80211_hdrlen(__le16 fc)
-{
- unsigned int hdrlen = 24;
-
- if (ieee80211_is_data(fc)) {
- if (ieee80211_has_a4(fc))
- hdrlen = 30;
- if (ieee80211_is_data_qos(fc))
- hdrlen += IEEE80211_QOS_CTL_LEN;
- goto out;
- }
-
- if (ieee80211_is_ctl(fc)) {
- /*
- * ACK and CTS are 10 bytes, all others 16. To see how
- * to get this condition consider
- * subtype mask: 0b0000000011110000 (0x00F0)
- * ACK subtype: 0b0000000011010000 (0x00D0)
- * CTS subtype: 0b0000000011000000 (0x00C0)
- * bits that matter: ^^^ (0x00E0)
- * value of those: 0b0000000011000000 (0x00C0)
- */
- if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
- hdrlen = 10;
- else
- hdrlen = 16;
- }
-out:
- return hdrlen;
-}
-EXPORT_SYMBOL(ieee80211_hdrlen);
-
-unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
-{
- const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data;
- unsigned int hdrlen;
-
- if (unlikely(skb->len < 10))
- return 0;
- hdrlen = ieee80211_hdrlen(hdr->frame_control);
- if (unlikely(hdrlen > skb->len))
- return 0;
- return hdrlen;
-}
-EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
-
-int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
-{
- int ae = meshhdr->flags & IEEE80211S_FLAGS_AE;
- /* 7.1.3.5a.2 */
- switch (ae) {
- case 0:
- return 6;
- case 1:
- return 12;
- case 2:
- return 18;
- case 3:
- return 24;
- default:
- return 6;
- }
-}
-
void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb = tx->skb;
@@ -411,6 +341,52 @@ void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
}
EXPORT_SYMBOL(ieee80211_stop_queue);
+void ieee80211_add_pending_skb(struct ieee80211_local *local,
+ struct sk_buff *skb)
+{
+ struct ieee80211_hw *hw = &local->hw;
+ unsigned long flags;
+ int queue = skb_get_queue_mapping(skb);
+
+ spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+ __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+ __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_PENDING);
+ skb_queue_tail(&local->pending[queue], skb);
+ __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+ spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+int ieee80211_add_pending_skbs(struct ieee80211_local *local,
+ struct sk_buff_head *skbs)
+{
+ struct ieee80211_hw *hw = &local->hw;
+ struct sk_buff *skb;
+ unsigned long flags;
+ int queue, ret = 0, i;
+
+ spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+ for (i = 0; i < hw->queues; i++)
+ __ieee80211_stop_queue(hw, i,
+ IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+
+ while ((skb = skb_dequeue(skbs))) {
+ ret++;
+ queue = skb_get_queue_mapping(skb);
+ skb_queue_tail(&local->pending[queue], skb);
+ }
+
+ for (i = 0; i < hw->queues; i++) {
+ if (ret)
+ __ieee80211_stop_queue(hw, i,
+ IEEE80211_QUEUE_STOP_REASON_PENDING);
+ __ieee80211_wake_queue(hw, i,
+ IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+ }
+ spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+ return ret;
+}
+
void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
enum queue_stop_reason reason)
{
@@ -536,8 +512,16 @@ EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
void ieee802_11_parse_elems(u8 *start, size_t len,
struct ieee802_11_elems *elems)
{
+ ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
+}
+
+u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
+ struct ieee802_11_elems *elems,
+ u64 filter, u32 crc)
+{
size_t left = len;
u8 *pos = start;
+ bool calc_crc = filter != 0;
memset(elems, 0, sizeof(*elems));
elems->ie_start = start;
@@ -551,7 +535,10 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
left -= 2;
if (elen > left)
- return;
+ break;
+
+ if (calc_crc && id < 64 && (filter & BIT(id)))
+ crc = crc32_be(crc, pos - 2, elen + 2);
switch (id) {
case WLAN_EID_SSID:
@@ -575,8 +562,10 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
elems->cf_params_len = elen;
break;
case WLAN_EID_TIM:
- elems->tim = pos;
- elems->tim_len = elen;
+ if (elen >= sizeof(struct ieee80211_tim_ie)) {
+ elems->tim = (void *)pos;
+ elems->tim_len = elen;
+ }
break;
case WLAN_EID_IBSS_PARAMS:
elems->ibss_params = pos;
@@ -586,15 +575,20 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
elems->challenge = pos;
elems->challenge_len = elen;
break;
- case WLAN_EID_WPA:
+ case WLAN_EID_VENDOR_SPECIFIC:
if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
pos[2] == 0xf2) {
/* Microsoft OUI (00:50:F2) */
+
+ if (calc_crc)
+ crc = crc32_be(crc, pos - 2, elen + 2);
+
if (pos[3] == 1) {
/* OUI Type 1 - WPA IE */
elems->wpa = pos;
elems->wpa_len = elen;
} else if (elen >= 5 && pos[3] == 2) {
+ /* OUI Type 2 - WMM IE */
if (pos[4] == 0) {
elems->wmm_info = pos;
elems->wmm_info_len = elen;
@@ -679,32 +673,70 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
left -= elen;
pos += elen;
}
+
+ return crc;
}
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_tx_queue_params qparam;
- int i;
+ int queue;
+ bool use_11b;
+ int aCWmin, aCWmax;
if (!local->ops->conf_tx)
return;
memset(&qparam, 0, sizeof(qparam));
- qparam.aifs = 2;
+ use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
+ !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
- if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
- !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
- qparam.cw_min = 31;
- else
- qparam.cw_min = 15;
-
- qparam.cw_max = 1023;
- qparam.txop = 0;
+ for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
+ /* Set defaults according to 802.11-2007 Table 7-37 */
+ aCWmax = 1023;
+ if (use_11b)
+ aCWmin = 31;
+ else
+ aCWmin = 15;
+
+ switch (queue) {
+ case 3: /* AC_BK */
+ qparam.cw_max = aCWmax;
+ qparam.cw_min = aCWmin;
+ qparam.txop = 0;
+ qparam.aifs = 7;
+ break;
+ default: /* never happens but let's not leave undefined */
+ case 2: /* AC_BE */
+ qparam.cw_max = aCWmax;
+ qparam.cw_min = aCWmin;
+ qparam.txop = 0;
+ qparam.aifs = 3;
+ break;
+ case 1: /* AC_VI */
+ qparam.cw_max = aCWmin;
+ qparam.cw_min = (aCWmin + 1) / 2 - 1;
+ if (use_11b)
+ qparam.txop = 6016/32;
+ else
+ qparam.txop = 3008/32;
+ qparam.aifs = 2;
+ break;
+ case 0: /* AC_VO */
+ qparam.cw_max = (aCWmin + 1) / 2 - 1;
+ qparam.cw_min = (aCWmin + 1) / 4 - 1;
+ if (use_11b)
+ qparam.txop = 3264/32;
+ else
+ qparam.txop = 1504/32;
+ qparam.aifs = 2;
+ break;
+ }
- for (i = 0; i < local_to_hw(local)->queues; i++)
- local->ops->conf_tx(local_to_hw(local), i, &qparam);
+ drv_conf_tx(local, queue, &qparam);
+ }
}
void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
@@ -831,16 +863,73 @@ void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
ieee80211_tx_skb(sdata, skb, encrypt);
}
+int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
+ const u8 *ie, size_t ie_len)
+{
+ struct ieee80211_supported_band *sband;
+ u8 *pos, *supp_rates_len, *esupp_rates_len = NULL;
+ int i;
+
+ sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+
+ pos = buffer;
+
+ *pos++ = WLAN_EID_SUPP_RATES;
+ supp_rates_len = pos;
+ *pos++ = 0;
+
+ for (i = 0; i < sband->n_bitrates; i++) {
+ struct ieee80211_rate *rate = &sband->bitrates[i];
+
+ if (esupp_rates_len) {
+ *esupp_rates_len += 1;
+ } else if (*supp_rates_len == 8) {
+ *pos++ = WLAN_EID_EXT_SUPP_RATES;
+ esupp_rates_len = pos;
+ *pos++ = 1;
+ } else
+ *supp_rates_len += 1;
+
+ *pos++ = rate->bitrate / 5;
+ }
+
+ if (sband->ht_cap.ht_supported) {
+ __le16 tmp = cpu_to_le16(sband->ht_cap.cap);
+
+ *pos++ = WLAN_EID_HT_CAPABILITY;
+ *pos++ = sizeof(struct ieee80211_ht_cap);
+ memset(pos, 0, sizeof(struct ieee80211_ht_cap));
+ memcpy(pos, &tmp, sizeof(u16));
+ pos += sizeof(u16);
+ /* TODO: needs a define here for << 2 */
+ *pos++ = sband->ht_cap.ampdu_factor |
+ (sband->ht_cap.ampdu_density << 2);
+ memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
+ pos += sizeof(sband->ht_cap.mcs);
+ pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
+ }
+
+ /*
+ * If adding more here, adjust code in main.c
+ * that calculates local->scan_ies_len.
+ */
+
+ if (ie) {
+ memcpy(pos, ie, ie_len);
+ pos += ie_len;
+ }
+
+ return pos - buffer;
+}
+
void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
- u8 *ssid, size_t ssid_len,
- u8 *ie, size_t ie_len)
+ const u8 *ssid, size_t ssid_len,
+ const u8 *ie, size_t ie_len)
{
struct ieee80211_local *local = sdata->local;
- struct ieee80211_supported_band *sband;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
- u8 *pos, *supp_rates, *esupp_rates = NULL;
- int i;
+ u8 *pos;
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
ie_len);
@@ -867,31 +956,9 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
*pos++ = WLAN_EID_SSID;
*pos++ = ssid_len;
memcpy(pos, ssid, ssid_len);
+ pos += ssid_len;
- supp_rates = skb_put(skb, 2);
- supp_rates[0] = WLAN_EID_SUPP_RATES;
- supp_rates[1] = 0;
- sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-
- for (i = 0; i < sband->n_bitrates; i++) {
- struct ieee80211_rate *rate = &sband->bitrates[i];
- if (esupp_rates) {
- pos = skb_put(skb, 1);
- esupp_rates[1]++;
- } else if (supp_rates[1] == 8) {
- esupp_rates = skb_put(skb, 3);
- esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
- esupp_rates[1] = 1;
- pos = &esupp_rates[2];
- } else {
- pos = skb_put(skb, 1);
- supp_rates[1]++;
- }
- *pos = rate->bitrate / 5;
- }
-
- if (ie)
- memcpy(skb_put(skb, ie_len), ie, ie_len);
+ skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len));
ieee80211_tx_skb(sdata, skb, 0);
}
@@ -931,3 +998,151 @@ u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
}
return supp_rates;
}
+
+int ieee80211_reconfig(struct ieee80211_local *local)
+{
+ struct ieee80211_hw *hw = &local->hw;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_init_conf conf;
+ struct sta_info *sta;
+ unsigned long flags;
+ int res;
+ bool from_suspend = local->suspended;
+
+ /*
+ * We're going to start the hardware, at that point
+ * we are no longer suspended and can RX frames.
+ */
+ local->suspended = false;
+
+ /* restart hardware */
+ if (local->open_count) {
+ res = drv_start(local);
+
+ ieee80211_led_radio(local, true);
+ }
+
+ /* add interfaces */
+ list_for_each_entry(sdata, &local->interfaces, list) {
+ if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+ sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+ netif_running(sdata->dev)) {
+ conf.vif = &sdata->vif;
+ conf.type = sdata->vif.type;
+ conf.mac_addr = sdata->dev->dev_addr;
+ res = drv_add_interface(local, &conf);
+ }
+ }
+
+ /* add STAs back */
+ if (local->ops->sta_notify) {
+ spin_lock_irqsave(&local->sta_lock, flags);
+ list_for_each_entry(sta, &local->sta_list, list) {
+ sdata = sta->sdata;
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ sdata = container_of(sdata->bss,
+ struct ieee80211_sub_if_data,
+ u.ap);
+
+ drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD,
+ &sta->sta);
+ }
+ spin_unlock_irqrestore(&local->sta_lock, flags);
+ }
+
+ /* Clear Suspend state so that ADDBA requests can be processed */
+
+ rcu_read_lock();
+
+ if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+ list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ clear_sta_flags(sta, WLAN_STA_SUSPEND);
+ }
+ }
+
+ rcu_read_unlock();
+
+ /* setup RTS threshold */
+ drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
+
+ /* reconfigure hardware */
+ ieee80211_hw_config(local, ~0);
+
+ netif_addr_lock_bh(local->mdev);
+ ieee80211_configure_filter(local);
+ netif_addr_unlock_bh(local->mdev);
+
+ /* Finally also reconfigure all the BSS information */
+ list_for_each_entry(sdata, &local->interfaces, list) {
+ u32 changed = ~0;
+ if (!netif_running(sdata->dev))
+ continue;
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ /* disable beacon change bits */
+ changed &= ~(BSS_CHANGED_BEACON |
+ BSS_CHANGED_BEACON_ENABLED);
+ /* fall through */
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_MESH_POINT:
+ ieee80211_bss_info_change_notify(sdata, changed);
+ break;
+ case NL80211_IFTYPE_WDS:
+ break;
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_MONITOR:
+ /* ignore virtual */
+ break;
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case __NL80211_IFTYPE_AFTER_LAST:
+ WARN_ON(1);
+ break;
+ }
+ }
+
+ /* add back keys */
+ list_for_each_entry(sdata, &local->interfaces, list)
+ if (netif_running(sdata->dev))
+ ieee80211_enable_keys(sdata);
+
+ ieee80211_wake_queues_by_reason(hw,
+ IEEE80211_QUEUE_STOP_REASON_SUSPEND);
+
+ /*
+ * If this is for hw restart things are still running.
+ * We may want to change that later, however.
+ */
+ if (!from_suspend)
+ return 0;
+
+#ifdef CONFIG_PM
+ local->suspended = false;
+
+ list_for_each_entry(sdata, &local->interfaces, list) {
+ switch(sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ ieee80211_sta_restart(sdata);
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ ieee80211_ibss_restart(sdata);
+ break;
+ case NL80211_IFTYPE_MESH_POINT:
+ ieee80211_mesh_restart(sdata);
+ break;
+ default:
+ break;
+ }
+ }
+
+ add_timer(&local->sta_cleanup);
+
+ spin_lock_irqsave(&local->sta_lock, flags);
+ list_for_each_entry(sta, &local->sta_list, list)
+ mesh_plink_restart(sta);
+ spin_unlock_irqrestore(&local->sta_lock, flags);
+#else
+ WARN_ON(1);
+#endif
+ return 0;
+}