From: "John W. Linville" <linville@tuxdriver.com>
To: davem@davemloft.net
Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: Please pull 'upstream-davem' branch of wireless-2.6
Date: Mon, 6 Aug 2007 17:01:31 -0400 [thread overview]
Message-ID: <20070806210131.GM6442@tuxdriver.com> (raw)
In-Reply-To: <20070806201321.GI6442@tuxdriver.com>
Some stuff for 2.6.24, when you are ready for it.
Individual patches here:
http://www.kernel.org/pub/linux/kernel/people/linville/wireless-2.6/upstream-davem/
Thanks!
John
---
The following changes since commit f27b62d3e7ecca42a75f1c5d3cc225539301ba6d:
Daniel Drake (1):
mac80211: don't allow scanning in monitor mode
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6.git upstream-davem
Andy Green (2):
mac80211: Add get_unaligned to ieee80211_get_radiotap_len
mac80211: Improve sanity checks on injected packets
Daniel Drake (3):
mac80211: STA reassociation improvements
mac80211: improved short preamble handling
mac80211: implement ERP info change notifications
Ivo van Doorn (1):
mac80211: Add LONG_RETRY flag to ieee80211_tx_control
Johannes Berg (14):
mac80211: split RX handlers into own file
mac80211: move QoS rx handlers into rx.c
mac80211: rx cleanups (1)
mac80211: split ieee80211_rx_h_check handler
mac80211: split up __ieee80211_rx
mac80211: fix bug for per-sta stats
mac80211: rx cleanups (2)
mac80211: split TX path into own file
mac80211: remove some unnecessary includes
mac80211: split out some key functions from ieee80211.c
mac80211: move some rate control functions out of ieee80211.c
mac80211: reorder interface related functions
mac80211: introduce util.c
mac80211: fix add_interface monitor mode behaviour
Michael Wu (2):
mac80211: improve locking of sta_info related structures
mac80211: use more GFP_KERNEL instead of GFP_ATOMIC
Thomas Graf (1):
Use type safe netlink interface
drivers/net/wireless/rtl8187.h | 1 +
drivers/net/wireless/rtl8187_dev.c | 4 +-
include/net/ieee80211_radiotap.h | 10 +
include/net/mac80211.h | 34 +-
net/mac80211/Makefile | 6 +-
net/mac80211/ieee80211.c | 4492 ++++--------------------------------
net/mac80211/ieee80211_i.h | 74 +-
net/mac80211/ieee80211_iface.c | 2 +-
net/mac80211/ieee80211_ioctl.c | 17 +-
net/mac80211/ieee80211_rate.c | 42 +
net/mac80211/ieee80211_rate.h | 6 +
net/mac80211/ieee80211_sta.c | 60 +-
net/mac80211/key.c | 69 +
net/mac80211/rx.c | 1453 ++++++++++++
net/mac80211/sta_info.c | 184 +-
net/mac80211/sta_info.h | 11 +-
net/mac80211/tx.c | 1883 +++++++++++++++
net/mac80211/util.c | 488 ++++
net/mac80211/wme.c | 65 -
net/mac80211/wme.h | 9 +-
net/wireless/wext.c | 30 +-
21 files changed, 4590 insertions(+), 4350 deletions(-)
create mode 100644 net/mac80211/key.c
create mode 100644 net/mac80211/rx.c
create mode 100644 net/mac80211/tx.c
create mode 100644 net/mac80211/util.c
diff --git a/drivers/net/wireless/rtl8187.h b/drivers/net/wireless/rtl8187.h
index 6124e46..7993b3d 100644
--- a/drivers/net/wireless/rtl8187.h
+++ b/drivers/net/wireless/rtl8187.h
@@ -67,6 +67,7 @@ struct rtl8187_priv {
struct rtl818x_csr *map;
void (*rf_init)(struct ieee80211_hw *);
int mode;
+ int if_id;
/* rtl8187 specific */
struct ieee80211_channel channels[14];
diff --git a/drivers/net/wireless/rtl8187_dev.c b/drivers/net/wireless/rtl8187_dev.c
index cea8589..c79663c 100644
--- a/drivers/net/wireless/rtl8187_dev.c
+++ b/drivers/net/wireless/rtl8187_dev.c
@@ -96,7 +96,7 @@ static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
tmp |= RTL8187_TX_FLAG_RTS;
hdr->rts_duration =
- ieee80211_rts_duration(dev, skb->len, control);
+ ieee80211_rts_duration(dev, priv->if_id, skb->len, control);
}
if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
tmp |= RTL8187_TX_FLAG_CTS;
@@ -510,6 +510,8 @@ static int rtl8187_config_interface(struct ieee80211_hw *dev, int if_id,
struct rtl8187_priv *priv = dev->priv;
int i;
+ priv->if_id = if_id;
+
for (i = 0; i < ETH_ALEN; i++)
rtl818x_iowrite8(priv, &priv->map->BSSID[i], conf->bssid[i]);
diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index a0c2b41..dfd8bf6 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -40,6 +40,7 @@
#include <linux/if_ether.h>
#include <linux/kernel.h>
+#include <asm/unaligned.h>
/* Radiotap header version (from official NetBSD feed) */
#define IEEE80211RADIOTAP_VERSION "1.5"
@@ -255,4 +256,13 @@ enum ieee80211_radiotap_type {
(((x) == 14) ? 2484 : ((x) * 5) + 2407) : \
((x) + 1000) * 5)
+/* helpers */
+static inline int ieee80211_get_radiotap_len(unsigned char *data)
+{
+ struct ieee80211_radiotap_header *hdr =
+ (struct ieee80211_radiotap_header *)data;
+
+ return le16_to_cpu(get_unaligned(&hdr->it_len));
+}
+
#endif /* IEEE80211_RADIOTAP_H */
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index c34fd9a..e503cd3 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -192,9 +192,15 @@ struct ieee80211_tx_control {
#define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of
* the frame */
#define IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY (1<<9)
+#define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send
+ * using the through
+ * set_retry_limit configured
+ * long retry value */
u32 flags; /* tx control flags defined
* above */
- u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. */
+ u8 retry_limit; /* 1 = only first attempt, 2 = one retry, ..
+ * This could be used when set_retry_limit
+ * is not implemented by the driver */
u8 power_level; /* per-packet transmit power level, in dBm */
u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */
s8 key_idx; /* -1 = do not encrypt, >= 0 keyidx from
@@ -626,8 +632,7 @@ struct ieee80211_ops {
* station hwaddr for individual keys. aid of the station is given
* to help low-level driver in selecting which key->hw_key_idx to use
* for this key. TX control data will use the hw_key_idx selected by
- * the low-level driver.
- * Must be atomic. */
+ * the low-level driver. */
int (*set_key)(struct ieee80211_hw *hw, set_key_cmd cmd,
u8 *addr, struct ieee80211_key_conf *key, int aid);
@@ -692,6 +697,14 @@ struct ieee80211_ops {
void (*sta_table_notification)(struct ieee80211_hw *hw,
int num_sta);
+ /* Handle ERP IE change notifications. Must be atomic. */
+ void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
+ int cts_protection, int preamble);
+
+ /* Flags for the erp_ie_changed changes parameter */
+#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */
+#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */
+
/* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
* bursting) for a hardware TX queue.
* queue = IEEE80211_TX_QUEUE_*.
@@ -830,6 +843,7 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
/**
* ieee80211_rts_get - RTS frame generation function
* @hw: pointer obtained from ieee80211_alloc_hw().
+ * @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame: pointer to the frame that is going to be protected by the RTS.
* @frame_len: the frame length (in octets).
* @frame_txctl: &struct ieee80211_tx_control of the frame.
@@ -840,7 +854,7 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
* the next RTS frame from the 802.11 code. The low-level is responsible
* for calling this function before and RTS frame is needed.
*/
-void ieee80211_rts_get(struct ieee80211_hw *hw,
+void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id,
const void *frame, size_t frame_len,
const struct ieee80211_tx_control *frame_txctl,
struct ieee80211_rts *rts);
@@ -848,6 +862,7 @@ void ieee80211_rts_get(struct ieee80211_hw *hw,
/**
* ieee80211_rts_duration - Get the duration field for an RTS frame
* @hw: pointer obtained from ieee80211_alloc_hw().
+ * @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame_len: the length of the frame that is going to be protected by the RTS.
* @frame_txctl: &struct ieee80211_tx_control of the frame.
*
@@ -855,13 +870,14 @@ void ieee80211_rts_get(struct ieee80211_hw *hw,
* the duration field, the low-level driver uses this function to receive
* the duration field value in little-endian byteorder.
*/
-__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
+__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id,
size_t frame_len,
const struct ieee80211_tx_control *frame_txctl);
/**
* ieee80211_ctstoself_get - CTS-to-self frame generation function
* @hw: pointer obtained from ieee80211_alloc_hw().
+ * @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame: pointer to the frame that is going to be protected by the CTS-to-self.
* @frame_len: the frame length (in octets).
* @frame_txctl: &struct ieee80211_tx_control of the frame.
@@ -872,7 +888,7 @@ __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
* the next CTS-to-self frame from the 802.11 code. The low-level is responsible
* for calling this function before and CTS-to-self frame is needed.
*/
-void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
+void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id,
const void *frame, size_t frame_len,
const struct ieee80211_tx_control *frame_txctl,
struct ieee80211_cts *cts);
@@ -880,6 +896,7 @@ void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
/**
* ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
* @hw: pointer obtained from ieee80211_alloc_hw().
+ * @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
* @frame_txctl: &struct ieee80211_tx_control of the frame.
*
@@ -887,20 +904,21 @@ void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
* the duration field, the low-level driver uses this function to receive
* the duration field value in little-endian byteorder.
*/
-__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
+__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
size_t frame_len,
const struct ieee80211_tx_control *frame_txctl);
/**
* ieee80211_generic_frame_duration - Calculate the duration field for a frame
* @hw: pointer obtained from ieee80211_alloc_hw().
+ * @if_id: interface ID from &struct ieee80211_if_init_conf.
* @frame_len: the length of the frame.
* @rate: the rate (in 100kbps) at which the frame is going to be transmitted.
*
* Calculate the duration field of some generic frame, given its
* length and transmission rate (in 100kbps).
*/
-__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
+__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id,
size_t frame_len,
int rate);
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
index a9c2d07..122b23e 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -2,6 +2,7 @@ obj-$(CONFIG_MAC80211) += mac80211.o rc80211_simple.o
mac80211-objs-$(CONFIG_MAC80211_LEDS) += ieee80211_led.o
mac80211-objs-$(CONFIG_MAC80211_DEBUGFS) += debugfs.o debugfs_sta.o debugfs_netdev.o debugfs_key.o
+mac80211-objs-$(CONFIG_NET_SCHED) += wme.o
mac80211-objs := \
ieee80211.o \
@@ -16,6 +17,9 @@ mac80211-objs := \
regdomain.o \
tkip.o \
aes_ccm.o \
- wme.o \
ieee80211_cfg.o \
+ rx.o \
+ tx.o \
+ key.o \
+ util.o \
$(mac80211-objs-y)
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index 8ec5ed1..99179e2 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -20,42 +20,19 @@
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/rtnetlink.h>
-#include <net/iw_handler.h>
-#include <linux/compiler.h>
#include <linux/bitmap.h>
#include <net/cfg80211.h>
-#include <asm/unaligned.h>
#include "ieee80211_common.h"
#include "ieee80211_i.h"
#include "ieee80211_rate.h"
#include "wep.h"
-#include "wpa.h"
-#include "tkip.h"
#include "wme.h"
#include "aes_ccm.h"
#include "ieee80211_led.h"
#include "ieee80211_cfg.h"
#include "debugfs.h"
#include "debugfs_netdev.h"
-#include "debugfs_key.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) */
-static const unsigned char rfc1042_header[] =
- { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
-
-/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
-static const unsigned char bridge_tunnel_header[] =
- { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
-
-/* No encapsulation header if EtherType < 0x600 (=length) */
-static const unsigned char eapol_header[] =
- { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
-
/*
* For seeing transmitted packets on monitor interfaces
@@ -67,2315 +44,245 @@ struct ieee80211_tx_status_rtap_hdr {
u8 data_retries;
} __attribute__ ((packed));
+/* common interface routines */
-static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_hdr *hdr)
-{
- /* Set the sequence number for this frame. */
- hdr->seq_ctrl = cpu_to_le16(sdata->sequence);
-
- /* Increase the sequence number. */
- sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ;
-}
-
-struct ieee80211_key_conf *
-ieee80211_key_data2conf(struct ieee80211_local *local,
- const struct ieee80211_key *data)
-{
- struct ieee80211_key_conf *conf;
-
- conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC);
- if (!conf)
- return NULL;
-
- conf->hw_key_idx = data->hw_key_idx;
- conf->alg = data->alg;
- conf->keylen = data->keylen;
- conf->flags = 0;
- if (data->force_sw_encrypt)
- conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT;
- conf->keyidx = data->keyidx;
- if (data->default_tx_key)
- conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY;
- if (local->default_wep_only)
- conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY;
- memcpy(conf->key, data->key, data->keylen);
-
- return conf;
-}
-
-struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
- int idx, size_t key_len, gfp_t flags)
-{
- struct ieee80211_key *key;
-
- key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags);
- if (!key)
- return NULL;
- kref_init(&key->kref);
- return key;
-}
-
-static void ieee80211_key_release(struct kref *kref)
-{
- struct ieee80211_key *key;
-
- key = container_of(kref, struct ieee80211_key, kref);
- if (key->alg == ALG_CCMP)
- ieee80211_aes_key_free(key->u.ccmp.tfm);
- ieee80211_debugfs_key_remove(key);
- kfree(key);
-}
-
-void ieee80211_key_free(struct ieee80211_key *key)
-{
- if (key)
- kref_put(&key->kref, ieee80211_key_release);
-}
-
-static int rate_list_match(const int *rate_list, int rate)
+static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
{
- int i;
-
- if (!rate_list)
- return 0;
-
- for (i = 0; rate_list[i] >= 0; i++)
- if (rate_list[i] == rate)
- return 1;
-
- return 0;
+ struct ieee80211_sub_if_data *sdata;
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ return &(sdata->stats);
}
-
-void ieee80211_prepare_rates(struct ieee80211_local *local,
- struct ieee80211_hw_mode *mode)
+static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
{
- int i;
-
- for (i = 0; i < mode->num_rates; i++) {
- struct ieee80211_rate *rate = &mode->rates[i];
-
- rate->flags &= ~(IEEE80211_RATE_SUPPORTED |
- IEEE80211_RATE_BASIC);
-
- if (local->supp_rates[mode->mode]) {
- if (!rate_list_match(local->supp_rates[mode->mode],
- rate->rate))
- continue;
- }
-
- rate->flags |= IEEE80211_RATE_SUPPORTED;
-
- /* Use configured basic rate set if it is available. If not,
- * use defaults that are sane for most cases. */
- if (local->basic_rates[mode->mode]) {
- if (rate_list_match(local->basic_rates[mode->mode],
- rate->rate))
- rate->flags |= IEEE80211_RATE_BASIC;
- } else switch (mode->mode) {
- case MODE_IEEE80211A:
- if (rate->rate == 60 || rate->rate == 120 ||
- rate->rate == 240)
- rate->flags |= IEEE80211_RATE_BASIC;
- break;
- case MODE_IEEE80211B:
- if (rate->rate == 10 || rate->rate == 20)
- rate->flags |= IEEE80211_RATE_BASIC;
- break;
- case MODE_ATHEROS_TURBO:
- if (rate->rate == 120 || rate->rate == 240 ||
- rate->rate == 480)
- rate->flags |= IEEE80211_RATE_BASIC;
- break;
- case MODE_IEEE80211G:
- if (rate->rate == 10 || rate->rate == 20 ||
- rate->rate == 55 || rate->rate == 110)
- rate->flags |= IEEE80211_RATE_BASIC;
- break;
- }
-
- /* Set ERP and MANDATORY flags based on phymode */
- switch (mode->mode) {
- case MODE_IEEE80211A:
- if (rate->rate == 60 || rate->rate == 120 ||
- rate->rate == 240)
- rate->flags |= IEEE80211_RATE_MANDATORY;
- break;
- case MODE_IEEE80211B:
- if (rate->rate == 10)
- rate->flags |= IEEE80211_RATE_MANDATORY;
- break;
- case MODE_ATHEROS_TURBO:
- break;
- case MODE_IEEE80211G:
- if (rate->rate == 10 || rate->rate == 20 ||
- rate->rate == 55 || rate->rate == 110 ||
- rate->rate == 60 || rate->rate == 120 ||
- rate->rate == 240)
- rate->flags |= IEEE80211_RATE_MANDATORY;
- break;
- }
- if (ieee80211_is_erp_rate(mode->mode, rate->rate))
- rate->flags |= IEEE80211_RATE_ERP;
- }
+ memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
+ return ETH_ALEN;
}
+/* master interface */
-static void ieee80211_key_threshold_notify(struct net_device *dev,
- struct ieee80211_key *key,
- struct sta_info *sta)
+static int ieee80211_master_open(struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct sk_buff *skb;
- struct ieee80211_msg_key_notification *msg;
-
- /* if no one will get it anyway, don't even allocate it.
- * unlikely because this is only relevant for APs
- * where the device must be open... */
- if (unlikely(!local->apdev))
- return;
-
- skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
- sizeof(struct ieee80211_msg_key_notification));
- if (!skb)
- return;
-
- skb_reserve(skb, sizeof(struct ieee80211_frame_info));
- msg = (struct ieee80211_msg_key_notification *)
- skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
- msg->tx_rx_count = key->tx_rx_count;
- memcpy(msg->ifname, dev->name, IFNAMSIZ);
- if (sta)
- memcpy(msg->addr, sta->addr, ETH_ALEN);
- else
- memset(msg->addr, 0xff, ETH_ALEN);
-
- key->tx_rx_count = 0;
-
- ieee80211_rx_mgmt(local, skb, NULL,
- ieee80211_msg_key_threshold_notification);
-}
-
-
-static u8 * ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
-{
- u16 fc;
-
- if (len < 24)
- return NULL;
-
- fc = le16_to_cpu(hdr->frame_control);
-
- switch (fc & IEEE80211_FCTL_FTYPE) {
- case IEEE80211_FTYPE_DATA:
- switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
- case IEEE80211_FCTL_TODS:
- return hdr->addr1;
- case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
- return NULL;
- case IEEE80211_FCTL_FROMDS:
- return hdr->addr2;
- case 0:
- return hdr->addr3;
- }
- break;
- case IEEE80211_FTYPE_MGMT:
- return hdr->addr3;
- case IEEE80211_FTYPE_CTL:
- if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
- return hdr->addr1;
- else
- return NULL;
- }
-
- return NULL;
-}
-
-int ieee80211_get_hdrlen(u16 fc)
-{
- int hdrlen = 24;
-
- switch (fc & IEEE80211_FCTL_FTYPE) {
- case IEEE80211_FTYPE_DATA:
- if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
- hdrlen = 30; /* Addr4 */
- /*
- * The QoS Control field is two bytes and its presence is
- * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to
- * hdrlen if that bit is set.
- * This works by masking out the bit and shifting it to
- * bit position 1 so the result has the value 0 or 2.
- */
- hdrlen += (fc & IEEE80211_STYPE_QOS_DATA)
- >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1);
- break;
- case IEEE80211_FTYPE_CTL:
- /*
- * 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 & 0xE0) == 0xC0)
- hdrlen = 10;
- else
- hdrlen = 16;
- break;
- }
-
- return hdrlen;
-}
-EXPORT_SYMBOL(ieee80211_get_hdrlen);
-
-int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
-{
- const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data;
- int hdrlen;
-
- if (unlikely(skb->len < 10))
- return 0;
- hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
- if (unlikely(hdrlen > skb->len))
- return 0;
- return hdrlen;
-}
-EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
-
-static int ieee80211_get_radiotap_len(struct sk_buff *skb)
-{
- struct ieee80211_radiotap_header *hdr =
- (struct ieee80211_radiotap_header *) skb->data;
-
- return le16_to_cpu(hdr->it_len);
-}
-
-#ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP
-static void ieee80211_dump_frame(const char *ifname, const char *title,
- const struct sk_buff *skb)
-{
- const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u16 fc;
- int hdrlen;
-
- printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len);
- if (skb->len < 4) {
- printk("\n");
- return;
- }
-
- fc = le16_to_cpu(hdr->frame_control);
- hdrlen = ieee80211_get_hdrlen(fc);
- if (hdrlen > skb->len)
- hdrlen = skb->len;
- if (hdrlen >= 4)
- printk(" FC=0x%04x DUR=0x%04x",
- fc, le16_to_cpu(hdr->duration_id));
- if (hdrlen >= 10)
- printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1));
- if (hdrlen >= 16)
- printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2));
- if (hdrlen >= 24)
- printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3));
- if (hdrlen >= 30)
- printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4));
- printk("\n");
-}
-#else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
-static inline void ieee80211_dump_frame(const char *ifname, const char *title,
- struct sk_buff *skb)
-{
-}
-#endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
-
-
-static int ieee80211_is_eapol(const struct sk_buff *skb)
-{
- const struct ieee80211_hdr *hdr;
- u16 fc;
- int hdrlen;
-
- if (unlikely(skb->len < 10))
- return 0;
-
- hdr = (const struct ieee80211_hdr *) skb->data;
- fc = le16_to_cpu(hdr->frame_control);
-
- if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
- return 0;
-
- hdrlen = ieee80211_get_hdrlen(fc);
-
- if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) &&
- memcmp(skb->data + hdrlen, eapol_header,
- sizeof(eapol_header)) == 0))
- return 1;
-
- return 0;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx)
-{
- struct rate_control_extra extra;
-
- memset(&extra, 0, sizeof(extra));
- extra.mode = tx->u.tx.mode;
- extra.mgmt_data = tx->sdata &&
- tx->sdata->type == IEEE80211_IF_TYPE_MGMT;
- extra.ethertype = tx->ethertype;
-
- tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb,
- &extra);
- if (unlikely(extra.probe != NULL)) {
- tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE;
- tx->u.tx.probe_last_frag = 1;
- tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val;
- tx->u.tx.rate = extra.probe;
- } else {
- tx->u.tx.control->alt_retry_rate = -1;
- }
- if (!tx->u.tx.rate)
- return TXRX_DROP;
- if (tx->u.tx.mode->mode == MODE_IEEE80211G &&
- tx->sdata->use_protection && tx->fragmented &&
- extra.nonerp) {
- tx->u.tx.last_frag_rate = tx->u.tx.rate;
- tx->u.tx.probe_last_frag = extra.probe ? 1 : 0;
-
- tx->u.tx.rate = extra.nonerp;
- tx->u.tx.control->rate = extra.nonerp;
- tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE;
- } else {
- tx->u.tx.last_frag_rate = tx->u.tx.rate;
- tx->u.tx.control->rate = tx->u.tx.rate;
- }
- tx->u.tx.control->tx_rate = tx->u.tx.rate->val;
- if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) &&
- tx->local->short_preamble &&
- (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) {
- tx->u.tx.short_preamble = 1;
- tx->u.tx.control->tx_rate = tx->u.tx.rate->val2;
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx)
-{
- if (tx->sta)
- tx->u.tx.control->key_idx = tx->sta->key_idx_compression;
- else
- tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID;
-
- if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
- tx->key = NULL;
- else if (tx->sta && tx->sta->key)
- tx->key = tx->sta->key;
- else if (tx->sdata->default_key)
- tx->key = tx->sdata->default_key;
- else if (tx->sdata->drop_unencrypted &&
- !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) {
- I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
- return TXRX_DROP;
- } else
- tx->key = NULL;
-
- if (tx->key) {
- tx->key->tx_rx_count++;
- if (unlikely(tx->local->key_tx_rx_threshold &&
- tx->key->tx_rx_count >
- tx->local->key_tx_rx_threshold)) {
- ieee80211_key_threshold_notify(tx->dev, tx->key,
- tx->sta);
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
- size_t hdrlen, per_fragm, num_fragm, payload_len, left;
- struct sk_buff **frags, *first, *frag;
- int i;
- u16 seq;
- u8 *pos;
- int frag_threshold = tx->local->fragmentation_threshold;
-
- if (!tx->fragmented)
- return TXRX_CONTINUE;
-
- first = tx->skb;
-
- hdrlen = ieee80211_get_hdrlen(tx->fc);
- payload_len = first->len - hdrlen;
- per_fragm = frag_threshold - hdrlen - FCS_LEN;
- num_fragm = (payload_len + per_fragm - 1) / per_fragm;
-
- frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC);
- if (!frags)
- goto fail;
-
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
- seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ;
- pos = first->data + hdrlen + per_fragm;
- left = payload_len - per_fragm;
- for (i = 0; i < num_fragm - 1; i++) {
- struct ieee80211_hdr *fhdr;
- size_t copylen;
-
- if (left <= 0)
- goto fail;
-
- /* reserve enough extra head and tail room for possible
- * encryption */
- frag = frags[i] =
- dev_alloc_skb(tx->local->tx_headroom +
- frag_threshold +
- IEEE80211_ENCRYPT_HEADROOM +
- IEEE80211_ENCRYPT_TAILROOM);
- if (!frag)
- goto fail;
- /* Make sure that all fragments use the same priority so
- * that they end up using the same TX queue */
- frag->priority = first->priority;
- skb_reserve(frag, tx->local->tx_headroom +
- IEEE80211_ENCRYPT_HEADROOM);
- fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen);
- memcpy(fhdr, first->data, hdrlen);
- if (i == num_fragm - 2)
- fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS);
- fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG));
- copylen = left > per_fragm ? per_fragm : left;
- memcpy(skb_put(frag, copylen), pos, copylen);
-
- pos += copylen;
- left -= copylen;
- }
- skb_trim(first, hdrlen + per_fragm);
-
- tx->u.tx.num_extra_frag = num_fragm - 1;
- tx->u.tx.extra_frag = frags;
-
- return TXRX_CONTINUE;
-
- fail:
- printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name);
- if (frags) {
- for (i = 0; i < num_fragm - 1; i++)
- if (frags[i])
- dev_kfree_skb(frags[i]);
- kfree(frags);
- }
- I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment);
- return TXRX_DROP;
-}
-
-
-static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb)
-{
- if (tx->key->force_sw_encrypt) {
- if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
- return -1;
- } else {
- tx->u.tx.control->key_idx = tx->key->hw_key_idx;
- if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
- if (ieee80211_wep_add_iv(tx->local, skb, tx->key) ==
- NULL)
- return -1;
- }
- }
- return 0;
-}
-
-
-void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
-
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- if (tx->u.tx.extra_frag) {
- struct ieee80211_hdr *fhdr;
- int i;
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- fhdr = (struct ieee80211_hdr *)
- tx->u.tx.extra_frag[i]->data;
- fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- }
- }
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
- u16 fc;
-
- fc = le16_to_cpu(hdr->frame_control);
-
- if (!tx->key || tx->key->alg != ALG_WEP ||
- ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
- ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
- (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
- return TXRX_CONTINUE;
-
- tx->u.tx.control->iv_len = WEP_IV_LEN;
- tx->u.tx.control->icv_len = WEP_ICV_LEN;
- ieee80211_tx_set_iswep(tx);
-
- if (wep_encrypt_skb(tx, tx->skb) < 0) {
- I802_DEBUG_INC(tx->local->tx_handlers_drop_wep);
- return TXRX_DROP;
- }
-
- if (tx->u.tx.extra_frag) {
- int i;
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) {
- I802_DEBUG_INC(tx->local->
- tx_handlers_drop_wep);
- return TXRX_DROP;
- }
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
- int rate, int erp, int short_preamble)
-{
- int dur;
-
- /* calculate duration (in microseconds, rounded up to next higher
- * integer if it includes a fractional microsecond) to send frame of
- * len bytes (does not include FCS) at the given rate. Duration will
- * also include SIFS.
- *
- * rate is in 100 kbps, so divident is multiplied by 10 in the
- * DIV_ROUND_UP() operations.
- */
-
- if (local->hw.conf.phymode == MODE_IEEE80211A || erp ||
- local->hw.conf.phymode == MODE_ATHEROS_TURBO) {
- /*
- * OFDM:
- *
- * N_DBPS = DATARATE x 4
- * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
- * (16 = SIGNAL time, 6 = tail bits)
- * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
- *
- * T_SYM = 4 usec
- * 802.11a - 17.5.2: aSIFSTime = 16 usec
- * 802.11g - 19.8.4: aSIFSTime = 10 usec +
- * signal ext = 6 usec
- */
- /* FIX: Atheros Turbo may have different (shorter) duration? */
- dur = 16; /* SIFS + signal ext */
- dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
- dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
- dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
- 4 * rate); /* T_SYM x N_SYM */
- } else {
- /*
- * 802.11b or 802.11g with 802.11b compatibility:
- * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
- * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
- *
- * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
- * aSIFSTime = 10 usec
- * aPreambleLength = 144 usec or 72 usec with short preamble
- * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
- */
- dur = 10; /* aSIFSTime = 10 usec */
- dur += short_preamble ? (72 + 24) : (144 + 48);
-
- dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
- }
-
- return dur;
-}
-
-
-/* Exported duration function for driver use */
-__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
- size_t frame_len, int rate)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- u16 dur;
- int erp;
-
- erp = ieee80211_is_erp_rate(hw->conf.phymode, rate);
- dur = ieee80211_frame_duration(local, frame_len, rate,
- erp, local->short_preamble);
-
- return cpu_to_le16(dur);
-}
-EXPORT_SYMBOL(ieee80211_generic_frame_duration);
-
-
-static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr,
- int next_frag_len)
-{
- int rate, mrate, erp, dur, i;
- struct ieee80211_rate *txrate = tx->u.tx.rate;
- struct ieee80211_local *local = tx->local;
- struct ieee80211_hw_mode *mode = tx->u.tx.mode;
-
- erp = txrate->flags & IEEE80211_RATE_ERP;
-
- /*
- * data and mgmt (except PS Poll):
- * - during CFP: 32768
- * - during contention period:
- * if addr1 is group address: 0
- * if more fragments = 0 and addr1 is individual address: time to
- * transmit one ACK plus SIFS
- * if more fragments = 1 and addr1 is individual address: time to
- * transmit next fragment plus 2 x ACK plus 3 x SIFS
- *
- * IEEE 802.11, 9.6:
- * - control response frame (CTS or ACK) shall be transmitted using the
- * same rate as the immediately previous frame in the frame exchange
- * sequence, if this rate belongs to the PHY mandatory rates, or else
- * at the highest possible rate belonging to the PHY rates in the
- * BSSBasicRateSet
- */
-
- if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) {
- /* TODO: These control frames are not currently sent by
- * 80211.o, but should they be implemented, this function
- * needs to be updated to support duration field calculation.
- *
- * RTS: time needed to transmit pending data/mgmt frame plus
- * one CTS frame plus one ACK frame plus 3 x SIFS
- * CTS: duration of immediately previous RTS minus time
- * required to transmit CTS and its SIFS
- * ACK: 0 if immediately previous directed data/mgmt had
- * more=0, with more=1 duration in ACK frame is duration
- * from previous frame minus time needed to transmit ACK
- * and its SIFS
- * PS Poll: BIT(15) | BIT(14) | aid
- */
- return 0;
- }
-
- /* data/mgmt */
- if (0 /* FIX: data/mgmt during CFP */)
- return 32768;
-
- if (group_addr) /* Group address as the destination - no ACK */
- return 0;
-
- /* Individual destination address:
- * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
- * CTS and ACK frames shall be transmitted using the highest rate in
- * basic rate set that is less than or equal to the rate of the
- * immediately previous frame and that is using the same modulation
- * (CCK or OFDM). If no basic rate set matches with these requirements,
- * the highest mandatory rate of the PHY that is less than or equal to
- * the rate of the previous frame is used.
- * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
- */
- rate = -1;
- mrate = 10; /* use 1 Mbps if everything fails */
- for (i = 0; i < mode->num_rates; i++) {
- struct ieee80211_rate *r = &mode->rates[i];
- if (r->rate > txrate->rate)
- break;
-
- if (IEEE80211_RATE_MODULATION(txrate->flags) !=
- IEEE80211_RATE_MODULATION(r->flags))
- continue;
-
- if (r->flags & IEEE80211_RATE_BASIC)
- rate = r->rate;
- else if (r->flags & IEEE80211_RATE_MANDATORY)
- mrate = r->rate;
- }
- if (rate == -1) {
- /* No matching basic rate found; use highest suitable mandatory
- * PHY rate */
- rate = mrate;
- }
-
- /* Time needed to transmit ACK
- * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
- * to closest integer */
-
- dur = ieee80211_frame_duration(local, 10, rate, erp,
- local->short_preamble);
-
- if (next_frag_len) {
- /* Frame is fragmented: duration increases with time needed to
- * transmit next fragment plus ACK and 2 x SIFS. */
- dur *= 2; /* ACK + SIFS */
- /* next fragment */
- dur += ieee80211_frame_duration(local, next_frag_len,
- txrate->rate, erp,
- local->short_preamble);
- }
-
- return dur;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
- u16 dur;
- struct ieee80211_tx_control *control = tx->u.tx.control;
- struct ieee80211_hw_mode *mode = tx->u.tx.mode;
-
- if (!is_multicast_ether_addr(hdr->addr1)) {
- if (tx->skb->len + FCS_LEN > tx->local->rts_threshold &&
- tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) {
- control->flags |= IEEE80211_TXCTL_USE_RTS_CTS;
- control->retry_limit =
- tx->local->long_retry_limit;
- } else {
- control->retry_limit =
- tx->local->short_retry_limit;
- }
- } else {
- control->retry_limit = 1;
- }
-
- if (tx->fragmented) {
- /* Do not use multiple retry rates when sending fragmented
- * frames.
- * TODO: The last fragment could still use multiple retry
- * rates. */
- control->alt_retry_rate = -1;
- }
-
- /* Use CTS protection for unicast frames sent using extended rates if
- * there are associated non-ERP stations and RTS/CTS is not configured
- * for the frame. */
- if (mode->mode == MODE_IEEE80211G &&
- (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) &&
- tx->u.tx.unicast && tx->sdata->use_protection &&
- !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS))
- control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT;
-
- /* Setup duration field for the first fragment of the frame. Duration
- * for remaining fragments will be updated when they are being sent
- * to low-level driver in ieee80211_tx(). */
- dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1),
- tx->fragmented ? tx->u.tx.extra_frag[0]->len :
- 0);
- hdr->duration_id = cpu_to_le16(dur);
-
- if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
- (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
- struct ieee80211_rate *rate;
-
- /* Do not use multiple retry rates when using RTS/CTS */
- control->alt_retry_rate = -1;
-
- /* Use min(data rate, max base rate) as CTS/RTS rate */
- rate = tx->u.tx.rate;
- while (rate > mode->rates &&
- !(rate->flags & IEEE80211_RATE_BASIC))
- rate--;
-
- control->rts_cts_rate = rate->val;
- control->rts_rate = rate;
- }
-
- if (tx->sta) {
- tx->sta->tx_packets++;
- tx->sta->tx_fragments++;
- tx->sta->tx_bytes += tx->skb->len;
- if (tx->u.tx.extra_frag) {
- int i;
- tx->sta->tx_fragments += tx->u.tx.num_extra_frag;
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- tx->sta->tx_bytes +=
- tx->u.tx.extra_frag[i]->len;
- }
- }
- }
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx)
-{
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- struct sk_buff *skb = tx->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
- u32 sta_flags;
-
- if (unlikely(tx->local->sta_scanning != 0) &&
- ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
- (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ))
- return TXRX_DROP;
-
- if (tx->u.tx.ps_buffered)
- return TXRX_CONTINUE;
-
- sta_flags = tx->sta ? tx->sta->flags : 0;
-
- if (likely(tx->u.tx.unicast)) {
- if (unlikely(!(sta_flags & WLAN_STA_ASSOC) &&
- tx->sdata->type != IEEE80211_IF_TYPE_IBSS &&
- (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: dropped data frame to not "
- "associated station " MAC_FMT "\n",
- tx->dev->name, MAC_ARG(hdr->addr1));
-#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
- I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
- return TXRX_DROP;
- }
- } else {
- if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- tx->local->num_sta == 0 &&
- !tx->local->allow_broadcast_always &&
- tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) {
- /*
- * No associated STAs - no need to send multicast
- * frames.
- */
- return TXRX_DROP;
- }
- return TXRX_CONTINUE;
- }
-
- if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x &&
- !(sta_flags & WLAN_STA_AUTHORIZED))) {
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT
- " (unauthorized port)\n", tx->dev->name,
- MAC_ARG(hdr->addr1));
-#endif
- I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port);
- return TXRX_DROP;
- }
-
- return TXRX_CONTINUE;
-}
-
-static ieee80211_txrx_result
-ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
-
- if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24)
- ieee80211_include_sequence(tx->sdata, hdr);
-
- return TXRX_CONTINUE;
-}
-
-/* This function is called whenever the AP is about to exceed the maximum limit
- * of buffered frames for power saving STAs. This situation should not really
- * happen often during normal operation, so dropping the oldest buffered packet
- * from each queue should be OK to make some room for new frames. */
-static void purge_old_ps_buffers(struct ieee80211_local *local)
-{
- int total = 0, purged = 0;
- struct sk_buff *skb;
struct ieee80211_sub_if_data *sdata;
- struct sta_info *sta;
+ int res = -EOPNOTSUPP;
read_lock(&local->sub_if_lock);
list_for_each_entry(sdata, &local->sub_if_list, list) {
- struct ieee80211_if_ap *ap;
- if (sdata->dev == local->mdev ||
- sdata->type != IEEE80211_IF_TYPE_AP)
- continue;
- ap = &sdata->u.ap;
- skb = skb_dequeue(&ap->ps_bc_buf);
- if (skb) {
- purged++;
- dev_kfree_skb(skb);
+ if (sdata->dev != dev && netif_running(sdata->dev)) {
+ res = 0;
+ break;
}
- total += skb_queue_len(&ap->ps_bc_buf);
}
read_unlock(&local->sub_if_lock);
-
- spin_lock_bh(&local->sta_lock);
- list_for_each_entry(sta, &local->sta_list, list) {
- skb = skb_dequeue(&sta->ps_tx_buf);
- if (skb) {
- purged++;
- dev_kfree_skb(skb);
- }
- total += skb_queue_len(&sta->ps_tx_buf);
- }
- spin_unlock_bh(&local->sta_lock);
-
- local->total_ps_buffered = total;
- printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n",
- local->mdev->name, purged);
-}
-
-
-static inline ieee80211_txrx_result
-ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx)
-{
- /* broadcast/multicast frame */
- /* If any of the associated stations is in power save mode,
- * the frame is buffered to be sent after DTIM beacon frame */
- if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) &&
- tx->sdata->type != IEEE80211_IF_TYPE_WDS &&
- tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) &&
- !(tx->fc & IEEE80211_FCTL_ORDER)) {
- if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
- purge_old_ps_buffers(tx->local);
- if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >=
- AP_MAX_BC_BUFFER) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: BC TX buffer full - "
- "dropping the oldest frame\n",
- tx->dev->name);
- }
- dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf));
- } else
- tx->local->total_ps_buffered++;
- skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb);
- return TXRX_QUEUED;
- }
-
- return TXRX_CONTINUE;
+ return res;
}
-
-static inline ieee80211_txrx_result
-ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx)
+static int ieee80211_master_stop(struct net_device *dev)
{
- struct sta_info *sta = tx->sta;
-
- if (unlikely(!sta ||
- ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT &&
- (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP)))
- return TXRX_CONTINUE;
-
- if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) {
- struct ieee80211_tx_packet_data *pkt_data;
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries "
- "before %d)\n",
- MAC_ARG(sta->addr), sta->aid,
- skb_queue_len(&sta->ps_tx_buf));
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- sta->flags |= WLAN_STA_TIM;
- if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
- purge_old_ps_buffers(tx->local);
- if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) {
- struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf);
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: STA " MAC_FMT " TX "
- "buffer full - dropping oldest frame\n",
- tx->dev->name, MAC_ARG(sta->addr));
- }
- dev_kfree_skb(old);
- } else
- tx->local->total_ps_buffered++;
- /* Queue frame to be sent after STA sends an PS Poll frame */
- if (skb_queue_empty(&sta->ps_tx_buf)) {
- if (tx->local->ops->set_tim)
- tx->local->ops->set_tim(local_to_hw(tx->local),
- sta->aid, 1);
- if (tx->sdata->bss)
- bss_tim_set(tx->local, tx->sdata->bss, sta->aid);
- }
- pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb;
- pkt_data->jiffies = jiffies;
- skb_queue_tail(&sta->ps_tx_buf, tx->skb);
- return TXRX_QUEUED;
- }
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- else if (unlikely(sta->flags & WLAN_STA_PS)) {
- printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll "
- "set -> send frame\n", tx->dev->name,
- MAC_ARG(sta->addr));
- }
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- sta->pspoll = 0;
-
- return TXRX_CONTINUE;
-}
-
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_sub_if_data *sdata;
-static ieee80211_txrx_result
-ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx)
-{
- if (unlikely(tx->u.tx.ps_buffered))
- return TXRX_CONTINUE;
+ read_lock(&local->sub_if_lock);
+ list_for_each_entry(sdata, &local->sub_if_list, list)
+ if (sdata->dev != dev && netif_running(sdata->dev))
+ dev_close(sdata->dev);
+ read_unlock(&local->sub_if_lock);
- if (tx->u.tx.unicast)
- return ieee80211_tx_h_unicast_ps_buf(tx);
- else
- return ieee80211_tx_h_multicast_ps_buf(tx);
+ return 0;
}
+/* management interface */
-/*
- * deal with packet injection down monitor interface
- * with Radiotap Header -- only called for monitor mode interface
- */
-
-static ieee80211_txrx_result
-__ieee80211_parse_tx_radiotap(
- struct ieee80211_txrx_data *tx,
- struct sk_buff *skb, struct ieee80211_tx_control *control)
+static void
+ieee80211_fill_frame_info(struct ieee80211_local *local,
+ struct ieee80211_frame_info *fi,
+ struct ieee80211_rx_status *status)
{
- /*
- * this is the moment to interpret and discard the radiotap header that
- * must be at the start of the packet injected in Monitor mode
- *
- * Need to take some care with endian-ness since radiotap
- * args are little-endian
- */
-
- struct ieee80211_radiotap_iterator iterator;
- struct ieee80211_radiotap_header *rthdr =
- (struct ieee80211_radiotap_header *) skb->data;
- struct ieee80211_hw_mode *mode = tx->local->hw.conf.mode;
- int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len);
-
- /*
- * default control situation for all injected packets
- * FIXME: this does not suit all usage cases, expand to allow control
- */
-
- control->retry_limit = 1; /* no retry */
- control->key_idx = -1; /* no encryption key */
- control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS |
- IEEE80211_TXCTL_USE_CTS_PROTECT);
- control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT |
- IEEE80211_TXCTL_NO_ACK;
- control->antenna_sel_tx = 0; /* default to default antenna */
-
- /*
- * for every radiotap entry that is present
- * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
- * entries present, or -EINVAL on error)
- */
-
- while (!ret) {
- int i, target_rate;
-
- ret = ieee80211_radiotap_iterator_next(&iterator);
-
- if (ret)
- continue;
+ if (status) {
+ struct timespec ts;
+ struct ieee80211_rate *rate;
- /* see if this argument is something we can use */
- switch (iterator.this_arg_index) {
- /*
- * You must take care when dereferencing iterator.this_arg
- * for multibyte types... the pointer is not aligned. Use
- * get_unaligned((type *)iterator.this_arg) to dereference
- * iterator.this_arg for type "type" safely on all arches.
- */
- case IEEE80211_RADIOTAP_RATE:
- /*
- * radiotap rate u8 is in 500kbps units eg, 0x02=1Mbps
- * ieee80211 rate int is in 100kbps units eg, 0x0a=1Mbps
- */
- target_rate = (*iterator.this_arg) * 5;
- for (i = 0; i < mode->num_rates; i++) {
- struct ieee80211_rate *r = &mode->rates[i];
-
- if (r->rate > target_rate)
- continue;
-
- control->rate = r;
-
- if (r->flags & IEEE80211_RATE_PREAMBLE2)
- control->tx_rate = r->val2;
- else
- control->tx_rate = r->val;
-
- /* end on exact match */
- if (r->rate == target_rate)
- i = mode->num_rates;
- }
+ jiffies_to_timespec(jiffies, &ts);
+ fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
+ ts.tv_nsec / 1000);
+ fi->mactime = cpu_to_be64(status->mactime);
+ switch (status->phymode) {
+ case MODE_IEEE80211A:
+ fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
break;
-
- case IEEE80211_RADIOTAP_ANTENNA:
- /*
- * radiotap uses 0 for 1st ant, mac80211 is 1 for
- * 1st ant
- */
- control->antenna_sel_tx = (*iterator.this_arg) + 1;
+ case MODE_IEEE80211B:
+ fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
break;
-
- case IEEE80211_RADIOTAP_DBM_TX_POWER:
- control->power_level = *iterator.this_arg;
+ case MODE_IEEE80211G:
+ fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
break;
-
- case IEEE80211_RADIOTAP_FLAGS:
- if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
- /*
- * this indicates that the skb we have been
- * handed has the 32-bit FCS CRC at the end...
- * we should react to that by snipping it off
- * because it will be recomputed and added
- * on transmission
- */
- if (skb->len < (iterator.max_length + FCS_LEN))
- return TXRX_DROP;
-
- skb_trim(skb, skb->len - FCS_LEN);
- }
+ case MODE_ATHEROS_TURBO:
+ fi->phytype =
+ htonl(ieee80211_phytype_dsss_dot11_turbo);
break;
-
default:
+ fi->phytype = htonl(0xAAAAAAAA);
break;
}
- }
-
- if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
- return TXRX_DROP;
-
- /*
- * remove the radiotap header
- * iterator->max_length was sanity-checked against
- * skb->len by iterator init
- */
- skb_pull(skb, iterator.max_length);
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result inline
-__ieee80211_tx_prepare(struct ieee80211_txrx_data *tx,
- struct sk_buff *skb,
- struct net_device *dev,
- struct ieee80211_tx_control *control)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct ieee80211_sub_if_data *sdata;
- ieee80211_txrx_result res = TXRX_CONTINUE;
-
- int hdrlen;
-
- memset(tx, 0, sizeof(*tx));
- tx->skb = skb;
- tx->dev = dev; /* use original interface */
- tx->local = local;
- tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- tx->sta = sta_info_get(local, hdr->addr1);
- tx->fc = le16_to_cpu(hdr->frame_control);
-
- /*
- * set defaults for things that can be set by
- * injected radiotap headers
- */
- control->power_level = local->hw.conf.power_level;
- control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
- if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta)
- control->antenna_sel_tx = tx->sta->antenna_sel_tx;
-
- /* process and remove the injection radiotap header */
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (unlikely(sdata->type == IEEE80211_IF_TYPE_MNTR)) {
- if (__ieee80211_parse_tx_radiotap(tx, skb, control) ==
- TXRX_DROP) {
- return TXRX_DROP;
- }
- /*
- * we removed the radiotap header after this point,
- * we filled control with what we could use
- * set to the actual ieee header now
- */
- hdr = (struct ieee80211_hdr *) skb->data;
- res = TXRX_QUEUED; /* indication it was monitor packet */
- }
-
- tx->u.tx.control = control;
- tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1);
- if (is_multicast_ether_addr(hdr->addr1))
- control->flags |= IEEE80211_TXCTL_NO_ACK;
- else
- control->flags &= ~IEEE80211_TXCTL_NO_ACK;
- tx->fragmented = local->fragmentation_threshold <
- IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast &&
- skb->len + FCS_LEN > local->fragmentation_threshold &&
- (!local->ops->set_frag_threshold);
- if (!tx->sta)
- control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
- else if (tx->sta->clear_dst_mask) {
- control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
- tx->sta->clear_dst_mask = 0;
- }
- hdrlen = ieee80211_get_hdrlen(tx->fc);
- if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) {
- u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)];
- tx->ethertype = (pos[0] << 8) | pos[1];
- }
- control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT;
-
- return res;
-}
-
-static int inline is_ieee80211_device(struct net_device *dev,
- struct net_device *master)
-{
- return (wdev_priv(dev->ieee80211_ptr) ==
- wdev_priv(master->ieee80211_ptr));
-}
-
-/* Device in tx->dev has a reference added; use dev_put(tx->dev) when
- * finished with it. */
-static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx,
- struct sk_buff *skb,
- struct net_device *mdev,
- struct ieee80211_tx_control *control)
-{
- struct ieee80211_tx_packet_data *pkt_data;
- struct net_device *dev;
-
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- dev = dev_get_by_index(pkt_data->ifindex);
- if (unlikely(dev && !is_ieee80211_device(dev, mdev))) {
- dev_put(dev);
- dev = NULL;
- }
- if (unlikely(!dev))
- return -ENODEV;
- __ieee80211_tx_prepare(tx, skb, dev, control);
- return 0;
-}
-
-static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local,
- int queue)
-{
- return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
-}
-
-static inline int __ieee80211_queue_pending(const struct ieee80211_local *local,
- int queue)
-{
- return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]);
-}
-
-#define IEEE80211_TX_OK 0
-#define IEEE80211_TX_AGAIN 1
-#define IEEE80211_TX_FRAG_AGAIN 2
-
-static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb,
- struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_tx_control *control = tx->u.tx.control;
- int ret, i;
-
- if (!ieee80211_qdisc_installed(local->mdev) &&
- __ieee80211_queue_stopped(local, 0)) {
- netif_stop_queue(local->mdev);
- return IEEE80211_TX_AGAIN;
- }
- if (skb) {
- ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb);
- ret = local->ops->tx(local_to_hw(local), skb, control);
- if (ret)
- return IEEE80211_TX_AGAIN;
- local->mdev->trans_start = jiffies;
- ieee80211_led_tx(local, 1);
- }
- if (tx->u.tx.extra_frag) {
- control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS |
- IEEE80211_TXCTL_USE_CTS_PROTECT |
- IEEE80211_TXCTL_CLEAR_DST_MASK |
- IEEE80211_TXCTL_FIRST_FRAGMENT);
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- if (!tx->u.tx.extra_frag[i])
- continue;
- if (__ieee80211_queue_stopped(local, control->queue))
- return IEEE80211_TX_FRAG_AGAIN;
- if (i == tx->u.tx.num_extra_frag) {
- control->tx_rate = tx->u.tx.last_frag_hwrate;
- control->rate = tx->u.tx.last_frag_rate;
- if (tx->u.tx.probe_last_frag)
- control->flags |=
- IEEE80211_TXCTL_RATE_CTRL_PROBE;
- else
- control->flags &=
- ~IEEE80211_TXCTL_RATE_CTRL_PROBE;
- }
-
- ieee80211_dump_frame(local->mdev->name,
- "TX to low-level driver",
- tx->u.tx.extra_frag[i]);
- ret = local->ops->tx(local_to_hw(local),
- tx->u.tx.extra_frag[i],
- control);
- if (ret)
- return IEEE80211_TX_FRAG_AGAIN;
- local->mdev->trans_start = jiffies;
- ieee80211_led_tx(local, 1);
- tx->u.tx.extra_frag[i] = NULL;
- }
- kfree(tx->u.tx.extra_frag);
- tx->u.tx.extra_frag = NULL;
- }
- return IEEE80211_TX_OK;
-}
-
-static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_tx_control *control, int mgmt)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct sta_info *sta;
- ieee80211_tx_handler *handler;
- struct ieee80211_txrx_data tx;
- ieee80211_txrx_result res = TXRX_DROP, res_prepare;
- int ret, i;
-
- WARN_ON(__ieee80211_queue_pending(local, control->queue));
-
- if (unlikely(skb->len < 10)) {
- dev_kfree_skb(skb);
- return 0;
- }
-
- res_prepare = __ieee80211_tx_prepare(&tx, skb, dev, control);
-
- if (res_prepare == TXRX_DROP) {
- dev_kfree_skb(skb);
- return 0;
- }
-
- sta = tx.sta;
- tx.u.tx.mgmt_interface = mgmt;
- tx.u.tx.mode = local->hw.conf.mode;
-
- if (res_prepare == TXRX_QUEUED) { /* if it was an injected packet */
- res = TXRX_CONTINUE;
- } else {
- for (handler = local->tx_handlers; *handler != NULL;
- handler++) {
- res = (*handler)(&tx);
- if (res != TXRX_CONTINUE)
- break;
- }
- }
-
- skb = tx.skb; /* handlers are allowed to change skb */
-
- if (sta)
- sta_info_put(sta);
-
- if (unlikely(res == TXRX_DROP)) {
- I802_DEBUG_INC(local->tx_handlers_drop);
- goto drop;
- }
-
- if (unlikely(res == TXRX_QUEUED)) {
- I802_DEBUG_INC(local->tx_handlers_queued);
- return 0;
- }
-
- if (tx.u.tx.extra_frag) {
- for (i = 0; i < tx.u.tx.num_extra_frag; i++) {
- int next_len, dur;
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *)
- tx.u.tx.extra_frag[i]->data;
-
- if (i + 1 < tx.u.tx.num_extra_frag) {
- next_len = tx.u.tx.extra_frag[i + 1]->len;
- } else {
- next_len = 0;
- tx.u.tx.rate = tx.u.tx.last_frag_rate;
- tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val;
- }
- dur = ieee80211_duration(&tx, 0, next_len);
- hdr->duration_id = cpu_to_le16(dur);
- }
- }
-
-retry:
- ret = __ieee80211_tx(local, skb, &tx);
- if (ret) {
- struct ieee80211_tx_stored_packet *store =
- &local->pending_packet[control->queue];
-
- if (ret == IEEE80211_TX_FRAG_AGAIN)
- skb = NULL;
- set_bit(IEEE80211_LINK_STATE_PENDING,
- &local->state[control->queue]);
- smp_mb();
- /* When the driver gets out of buffers during sending of
- * fragments and calls ieee80211_stop_queue, there is
- * a small window between IEEE80211_LINK_STATE_XOFF and
- * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer
- * gets available in that window (i.e. driver calls
- * ieee80211_wake_queue), we would end up with ieee80211_tx
- * called with IEEE80211_LINK_STATE_PENDING. Prevent this by
- * continuing transmitting here when that situation is
- * possible to have happened. */
- if (!__ieee80211_queue_stopped(local, control->queue)) {
- clear_bit(IEEE80211_LINK_STATE_PENDING,
- &local->state[control->queue]);
- goto retry;
- }
- memcpy(&store->control, control,
- sizeof(struct ieee80211_tx_control));
- store->skb = skb;
- store->extra_frag = tx.u.tx.extra_frag;
- store->num_extra_frag = tx.u.tx.num_extra_frag;
- store->last_frag_hwrate = tx.u.tx.last_frag_hwrate;
- store->last_frag_rate = tx.u.tx.last_frag_rate;
- store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag;
- }
- return 0;
-
- drop:
- if (skb)
- dev_kfree_skb(skb);
- for (i = 0; i < tx.u.tx.num_extra_frag; i++)
- if (tx.u.tx.extra_frag[i])
- dev_kfree_skb(tx.u.tx.extra_frag[i]);
- kfree(tx.u.tx.extra_frag);
- return 0;
-}
-
-static void ieee80211_tx_pending(unsigned long data)
-{
- struct ieee80211_local *local = (struct ieee80211_local *)data;
- struct net_device *dev = local->mdev;
- struct ieee80211_tx_stored_packet *store;
- struct ieee80211_txrx_data tx;
- int i, ret, reschedule = 0;
-
- netif_tx_lock_bh(dev);
- for (i = 0; i < local->hw.queues; i++) {
- if (__ieee80211_queue_stopped(local, i))
- continue;
- if (!__ieee80211_queue_pending(local, i)) {
- reschedule = 1;
- continue;
- }
- store = &local->pending_packet[i];
- tx.u.tx.control = &store->control;
- tx.u.tx.extra_frag = store->extra_frag;
- tx.u.tx.num_extra_frag = store->num_extra_frag;
- tx.u.tx.last_frag_hwrate = store->last_frag_hwrate;
- tx.u.tx.last_frag_rate = store->last_frag_rate;
- tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe;
- ret = __ieee80211_tx(local, store->skb, &tx);
- if (ret) {
- if (ret == IEEE80211_TX_FRAG_AGAIN)
- store->skb = NULL;
+ fi->channel = htonl(status->channel);
+ rate = ieee80211_get_rate(local, status->phymode,
+ status->rate);
+ if (rate) {
+ fi->datarate = htonl(rate->rate);
+ if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
+ if (status->rate == rate->val)
+ fi->preamble = htonl(2); /* long */
+ else if (status->rate == rate->val2)
+ fi->preamble = htonl(1); /* short */
+ } else
+ fi->preamble = htonl(0);
} else {
- clear_bit(IEEE80211_LINK_STATE_PENDING,
- &local->state[i]);
- reschedule = 1;
- }
- }
- netif_tx_unlock_bh(dev);
- if (reschedule) {
- if (!ieee80211_qdisc_installed(dev)) {
- if (!__ieee80211_queue_stopped(local, 0))
- netif_wake_queue(dev);
- } else
- netif_schedule(dev);
- }
-}
-
-static void ieee80211_clear_tx_pending(struct ieee80211_local *local)
-{
- int i, j;
- struct ieee80211_tx_stored_packet *store;
-
- for (i = 0; i < local->hw.queues; i++) {
- if (!__ieee80211_queue_pending(local, i))
- continue;
- store = &local->pending_packet[i];
- kfree_skb(store->skb);
- for (j = 0; j < store->num_extra_frag; j++)
- kfree_skb(store->extra_frag[j]);
- kfree(store->extra_frag);
- clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]);
- }
-}
-
-static int ieee80211_master_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ieee80211_tx_control control;
- struct ieee80211_tx_packet_data *pkt_data;
- struct net_device *odev = NULL;
- struct ieee80211_sub_if_data *osdata;
- int headroom;
- int ret;
-
- /*
- * copy control out of the skb so other people can use skb->cb
- */
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- memset(&control, 0, sizeof(struct ieee80211_tx_control));
-
- if (pkt_data->ifindex)
- odev = dev_get_by_index(pkt_data->ifindex);
- if (unlikely(odev && !is_ieee80211_device(odev, dev))) {
- dev_put(odev);
- odev = NULL;
- }
- if (unlikely(!odev)) {
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: Discarded packet with nonexistent "
- "originating device\n", dev->name);
-#endif
- dev_kfree_skb(skb);
- return 0;
- }
- osdata = IEEE80211_DEV_TO_SUB_IF(odev);
-
- headroom = osdata->local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM;
- if (skb_headroom(skb) < headroom) {
- if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
- dev_kfree_skb(skb);
- dev_put(odev);
- return 0;
- }
- }
-
- control.ifindex = odev->ifindex;
- control.type = osdata->type;
- if (pkt_data->req_tx_status)
- control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS;
- if (pkt_data->do_not_encrypt)
- control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT;
- if (pkt_data->requeue)
- control.flags |= IEEE80211_TXCTL_REQUEUE;
- control.queue = pkt_data->queue;
-
- ret = ieee80211_tx(odev, skb, &control,
- control.type == IEEE80211_IF_TYPE_MGMT);
- dev_put(odev);
-
- return ret;
-}
-
-
-int ieee80211_monitor_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_tx_packet_data *pkt_data;
- struct ieee80211_radiotap_header *prthdr =
- (struct ieee80211_radiotap_header *)skb->data;
- u16 len;
-
- /*
- * there must be a radiotap header at the
- * start in this case
- */
- if (unlikely(prthdr->it_version)) {
- /* only version 0 is supported */
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- skb->dev = local->mdev;
-
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- memset(pkt_data, 0, sizeof(*pkt_data));
- pkt_data->ifindex = dev->ifindex;
- pkt_data->mgmt_iface = 0;
- pkt_data->do_not_encrypt = 1;
-
- /* above needed because we set skb device to master */
-
- /*
- * fix up the pointers accounting for the radiotap
- * header still being in there. We are being given
- * a precooked IEEE80211 header so no need for
- * normal processing
- */
- len = le16_to_cpu(get_unaligned(&prthdr->it_len));
- skb_set_mac_header(skb, len);
- skb_set_network_header(skb, len + sizeof(struct ieee80211_hdr));
- skb_set_transport_header(skb, len + sizeof(struct ieee80211_hdr));
-
- /*
- * pass the radiotap header up to
- * the next stage intact
- */
- dev_queue_xmit(skb);
-
- return NETDEV_TX_OK;
-}
-
-
-/**
- * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
- * subinterfaces (wlan#, WDS, and VLAN interfaces)
- * @skb: packet to be sent
- * @dev: incoming interface
- *
- * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
- * not be freed, and caller is responsible for either retrying later or freeing
- * skb).
- *
- * This function takes in an Ethernet header and encapsulates it with suitable
- * IEEE 802.11 header based on which interface the packet is coming in. The
- * encapsulated packet will then be passed to master interface, wlan#.11, for
- * transmission (through low-level driver).
- */
-int ieee80211_subif_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_tx_packet_data *pkt_data;
- struct ieee80211_sub_if_data *sdata;
- int ret = 1, head_need;
- u16 ethertype, hdrlen, fc;
- struct ieee80211_hdr hdr;
- const u8 *encaps_data;
- int encaps_len, skip_header_bytes;
- int nh_pos, h_pos, no_encrypt = 0;
- struct sta_info *sta;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- if (unlikely(skb->len < ETH_HLEN)) {
- printk(KERN_DEBUG "%s: short skb (len=%d)\n",
- dev->name, skb->len);
- ret = 0;
- goto fail;
- }
-
- nh_pos = skb_network_header(skb) - skb->data;
- h_pos = skb_transport_header(skb) - skb->data;
-
- /* convert Ethernet header to proper 802.11 header (based on
- * operation mode) */
- ethertype = (skb->data[12] << 8) | skb->data[13];
- /* TODO: handling for 802.1x authorized/unauthorized port */
- fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
-
- if (likely(sdata->type == IEEE80211_IF_TYPE_AP ||
- sdata->type == IEEE80211_IF_TYPE_VLAN)) {
- fc |= IEEE80211_FCTL_FROMDS;
- /* DA BSSID SA */
- memcpy(hdr.addr1, skb->data, ETH_ALEN);
- memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
- memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
- hdrlen = 24;
- } else if (sdata->type == IEEE80211_IF_TYPE_WDS) {
- fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS;
- /* RA TA DA SA */
- memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
- memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
- memcpy(hdr.addr3, skb->data, ETH_ALEN);
- memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
- hdrlen = 30;
- } else if (sdata->type == IEEE80211_IF_TYPE_STA) {
- fc |= IEEE80211_FCTL_TODS;
- /* BSSID SA DA */
- memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN);
- memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
- memcpy(hdr.addr3, skb->data, ETH_ALEN);
- hdrlen = 24;
- } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
- /* DA SA BSSID */
- memcpy(hdr.addr1, skb->data, ETH_ALEN);
- memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
- memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN);
- hdrlen = 24;
- } else {
- ret = 0;
- goto fail;
- }
-
- /* receiver is QoS enabled, use a QoS type frame */
- sta = sta_info_get(local, hdr.addr1);
- if (sta) {
- if (sta->flags & WLAN_STA_WME) {
- fc |= IEEE80211_STYPE_QOS_DATA;
- hdrlen += 2;
+ fi->datarate = htonl(0);
+ fi->preamble = htonl(0);
}
- sta_info_put(sta);
- }
- hdr.frame_control = cpu_to_le16(fc);
- hdr.duration_id = 0;
- hdr.seq_ctrl = 0;
-
- skip_header_bytes = ETH_HLEN;
- if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
- encaps_data = bridge_tunnel_header;
- encaps_len = sizeof(bridge_tunnel_header);
- skip_header_bytes -= 2;
- } else if (ethertype >= 0x600) {
- encaps_data = rfc1042_header;
- encaps_len = sizeof(rfc1042_header);
- skip_header_bytes -= 2;
+ fi->antenna = htonl(status->antenna);
+ fi->priority = htonl(0xffffffff); /* no clue */
+ fi->ssi_type = htonl(ieee80211_ssi_raw);
+ fi->ssi_signal = htonl(status->ssi);
+ fi->ssi_noise = 0x00000000;
+ fi->encoding = 0;
} else {
- encaps_data = NULL;
- encaps_len = 0;
- }
-
- skb_pull(skb, skip_header_bytes);
- nh_pos -= skip_header_bytes;
- h_pos -= skip_header_bytes;
-
- /* TODO: implement support for fragments so that there is no need to
- * reallocate and copy payload; it might be enough to support one
- * extra fragment that would be copied in the beginning of the frame
- * data.. anyway, it would be nice to include this into skb structure
- * somehow
- *
- * There are few options for this:
- * use skb->cb as an extra space for 802.11 header
- * allocate new buffer if not enough headroom
- * make sure that there is enough headroom in every skb by increasing
- * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and
- * alloc_skb() (net/core/skbuff.c)
- */
- head_need = hdrlen + encaps_len + local->tx_headroom;
- head_need -= skb_headroom(skb);
-
- /* We are going to modify skb data, so make a copy of it if happens to
- * be cloned. This could happen, e.g., with Linux bridge code passing
- * us broadcast frames. */
-
- if (head_need > 0 || skb_cloned(skb)) {
-#if 0
- printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes "
- "of headroom\n", dev->name, head_need);
-#endif
-
- if (skb_cloned(skb))
- I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
- else
- I802_DEBUG_INC(local->tx_expand_skb_head);
- /* Since we have to reallocate the buffer, make sure that there
- * is enough room for possible WEP IV/ICV and TKIP (8 bytes
- * before payload and 12 after). */
- if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8),
- 12, GFP_ATOMIC)) {
- printk(KERN_DEBUG "%s: failed to reallocate TX buffer"
- "\n", dev->name);
- goto fail;
- }
- }
+ /* clear everything because we really don't know.
+ * the msg_type field isn't present on monitor frames
+ * so we don't know whether it will be present or not,
+ * but it's ok to not clear it since it'll be assigned
+ * anyway */
+ memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
- if (encaps_data) {
- memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
- nh_pos += encaps_len;
- h_pos += encaps_len;
+ fi->ssi_type = htonl(ieee80211_ssi_none);
}
- memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
- nh_pos += hdrlen;
- h_pos += hdrlen;
-
- pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
- memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
- pkt_data->ifindex = dev->ifindex;
- pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
- pkt_data->do_not_encrypt = no_encrypt;
-
- skb->dev = local->mdev;
- sdata->stats.tx_packets++;
- sdata->stats.tx_bytes += skb->len;
-
- /* Update skb pointers to various headers since this modified frame
- * is going to go through Linux networking code that may potentially
- * need things like pointer to IP header. */
- skb_set_mac_header(skb, 0);
- skb_set_network_header(skb, nh_pos);
- skb_set_transport_header(skb, h_pos);
-
- dev->trans_start = jiffies;
- dev_queue_xmit(skb);
-
- return 0;
-
- fail:
- if (!ret)
- dev_kfree_skb(skb);
-
- return ret;
+ fi->version = htonl(IEEE80211_FI_VERSION);
+ fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
}
-
-/*
- * This is the transmit routine for the 802.11 type interfaces
- * called by upper layers of the linux networking
- * stack when it has a frame to transmit
- */
-static int
-ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev)
+/* this routine is actually not just for this, but also
+ * for pushing fake 'management' frames into userspace.
+ * it shall be replaced by a netlink-based system. */
+void
+ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
+ struct ieee80211_rx_status *status, u32 msg_type)
{
+ struct ieee80211_frame_info *fi;
+ const size_t hlen = sizeof(struct ieee80211_frame_info);
struct ieee80211_sub_if_data *sdata;
- struct ieee80211_tx_packet_data *pkt_data;
- struct ieee80211_hdr *hdr;
- u16 fc;
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ skb->dev = local->apdev;
- if (skb->len < 10) {
- dev_kfree_skb(skb);
- return 0;
- }
+ sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
- if (skb_headroom(skb) < sdata->local->tx_headroom) {
- if (pskb_expand_head(skb, sdata->local->tx_headroom,
- 0, GFP_ATOMIC)) {
+ if (skb_headroom(skb) < hlen) {
+ I802_DEBUG_INC(local->rx_expand_skb_head);
+ if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
dev_kfree_skb(skb);
- return 0;
+ return;
}
}
- hdr = (struct ieee80211_hdr *) skb->data;
- fc = le16_to_cpu(hdr->frame_control);
-
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
- memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
- pkt_data->ifindex = sdata->dev->ifindex;
- pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
-
- skb->priority = 20; /* use hardcoded priority for mgmt TX queue */
- skb->dev = sdata->local->mdev;
-
- /*
- * We're using the protocol field of the the frame control header
- * to request TX callback for hostapd. BIT(1) is checked.
- */
- if ((fc & BIT(1)) == BIT(1)) {
- pkt_data->req_tx_status = 1;
- fc &= ~BIT(1);
- hdr->frame_control = cpu_to_le16(fc);
- }
-
- pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED);
-
- sdata->stats.tx_packets++;
- sdata->stats.tx_bytes += skb->len;
-
- dev_queue_xmit(skb);
-
- return 0;
-}
-
+ fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
-static void ieee80211_beacon_add_tim(struct ieee80211_local *local,
- struct ieee80211_if_ap *bss,
- struct sk_buff *skb)
-{
- u8 *pos, *tim;
- int aid0 = 0;
- int i, have_bits = 0, n1, n2;
-
- /* Generate bitmap for TIM only if there are any STAs in power save
- * mode. */
- spin_lock_bh(&local->sta_lock);
- if (atomic_read(&bss->num_sta_ps) > 0)
- /* in the hope that this is faster than
- * checking byte-for-byte */
- have_bits = !bitmap_empty((unsigned long*)bss->tim,
- IEEE80211_MAX_AID+1);
-
- if (bss->dtim_count == 0)
- bss->dtim_count = bss->dtim_period - 1;
- else
- bss->dtim_count--;
-
- tim = pos = (u8 *) skb_put(skb, 6);
- *pos++ = WLAN_EID_TIM;
- *pos++ = 4;
- *pos++ = bss->dtim_count;
- *pos++ = bss->dtim_period;
-
- if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf))
- aid0 = 1;
-
- if (have_bits) {
- /* Find largest even number N1 so that bits numbered 1 through
- * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
- * (N2 + 1) x 8 through 2007 are 0. */
- n1 = 0;
- for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
- if (bss->tim[i]) {
- n1 = i & 0xfe;
- break;
- }
- }
- n2 = n1;
- for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
- if (bss->tim[i]) {
- n2 = i;
- break;
- }
- }
+ ieee80211_fill_frame_info(local, fi, status);
+ fi->msg_type = htonl(msg_type);
- /* Bitmap control */
- *pos++ = n1 | aid0;
- /* Part Virt Bitmap */
- memcpy(pos, bss->tim + n1, n2 - n1 + 1);
+ sdata->stats.rx_packets++;
+ sdata->stats.rx_bytes += skb->len;
- tim[1] = n2 - n1 + 4;
- skb_put(skb, n2 - n1);
- } else {
- *pos++ = aid0; /* Bitmap control */
- *pos++ = 0; /* Part Virt Bitmap */
- }
- spin_unlock_bh(&local->sta_lock);
+ skb_set_mac_header(skb, 0);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb->pkt_type = PACKET_OTHERHOST;
+ skb->protocol = htons(ETH_P_802_2);
+ memset(skb->cb, 0, sizeof(skb->cb));
+ netif_rx(skb);
}
-
-struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id,
- struct ieee80211_tx_control *control)
+int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
+ int radar, int radar_type)
{
- struct ieee80211_local *local = hw_to_local(hw);
struct sk_buff *skb;
- struct net_device *bdev;
- struct ieee80211_sub_if_data *sdata = NULL;
- struct ieee80211_if_ap *ap = NULL;
- struct ieee80211_rate *rate;
- struct rate_control_extra extra;
- u8 *b_head, *b_tail;
- int bh_len, bt_len;
-
- bdev = dev_get_by_index(if_id);
- if (bdev) {
- sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
- ap = &sdata->u.ap;
- dev_put(bdev);
- }
-
- if (!ap || sdata->type != IEEE80211_IF_TYPE_AP ||
- !ap->beacon_head) {
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "no beacon data avail for idx=%d "
- "(%s)\n", if_id, bdev ? bdev->name : "N/A");
-#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
- return NULL;
- }
-
- /* Assume we are generating the normal beacon locally */
- b_head = ap->beacon_head;
- b_tail = ap->beacon_tail;
- bh_len = ap->beacon_head_len;
- bt_len = ap->beacon_tail_len;
-
- skb = dev_alloc_skb(local->tx_headroom +
- bh_len + bt_len + 256 /* maximum TIM len */);
- if (!skb)
- return NULL;
-
- skb_reserve(skb, local->tx_headroom);
- memcpy(skb_put(skb, bh_len), b_head, bh_len);
-
- ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data);
-
- ieee80211_beacon_add_tim(local, ap, skb);
-
- if (b_tail) {
- memcpy(skb_put(skb, bt_len), b_tail, bt_len);
- }
-
- if (control) {
- memset(&extra, 0, sizeof(extra));
- extra.mode = local->oper_hw_mode;
-
- rate = rate_control_get_rate(local, local->mdev, skb, &extra);
- if (!rate) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate "
- "found\n", local->mdev->name);
- }
- dev_kfree_skb(skb);
- return NULL;
- }
-
- control->tx_rate = (local->short_preamble &&
- (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
- rate->val2 : rate->val;
- control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
- control->power_level = local->hw.conf.power_level;
- control->flags |= IEEE80211_TXCTL_NO_ACK;
- control->retry_limit = 1;
- control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
- }
-
- ap->num_beacons++;
- return skb;
-}
-EXPORT_SYMBOL(ieee80211_beacon_get);
-
-__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
- size_t frame_len,
- const struct ieee80211_tx_control *frame_txctl)
-{
+ struct ieee80211_radar_info *msg;
struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_rate *rate;
- int short_preamble = local->short_preamble;
- int erp;
- u16 dur;
-
- rate = frame_txctl->rts_rate;
- erp = !!(rate->flags & IEEE80211_RATE_ERP);
-
- /* CTS duration */
- dur = ieee80211_frame_duration(local, 10, rate->rate,
- erp, short_preamble);
- /* Data frame duration */
- dur += ieee80211_frame_duration(local, frame_len, rate->rate,
- erp, short_preamble);
- /* ACK duration */
- dur += ieee80211_frame_duration(local, 10, rate->rate,
- erp, short_preamble);
-
- return cpu_to_le16(dur);
-}
-EXPORT_SYMBOL(ieee80211_rts_duration);
+ if (!local->apdev)
+ return 0;
-__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
- size_t frame_len,
- const struct ieee80211_tx_control *frame_txctl)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_rate *rate;
- int short_preamble = local->short_preamble;
- int erp;
- u16 dur;
-
- rate = frame_txctl->rts_rate;
- erp = !!(rate->flags & IEEE80211_RATE_ERP);
-
- /* Data frame duration */
- dur = ieee80211_frame_duration(local, frame_len, rate->rate,
- erp, short_preamble);
- if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) {
- /* ACK duration */
- dur += ieee80211_frame_duration(local, 10, rate->rate,
- erp, short_preamble);
- }
-
- return cpu_to_le16(dur);
-}
-EXPORT_SYMBOL(ieee80211_ctstoself_duration);
+ skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
+ sizeof(struct ieee80211_radar_info));
-void ieee80211_rts_get(struct ieee80211_hw *hw,
- const void *frame, size_t frame_len,
- const struct ieee80211_tx_control *frame_txctl,
- struct ieee80211_rts *rts)
-{
- const struct ieee80211_hdr *hdr = frame;
- u16 fctl;
-
- fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS;
- rts->frame_control = cpu_to_le16(fctl);
- rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl);
- memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
- memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
-}
-EXPORT_SYMBOL(ieee80211_rts_get);
+ if (!skb)
+ return -ENOMEM;
+ skb_reserve(skb, sizeof(struct ieee80211_frame_info));
-void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
- const void *frame, size_t frame_len,
- const struct ieee80211_tx_control *frame_txctl,
- struct ieee80211_cts *cts)
-{
- const struct ieee80211_hdr *hdr = frame;
- u16 fctl;
+ msg = (struct ieee80211_radar_info *)
+ skb_put(skb, sizeof(struct ieee80211_radar_info));
+ msg->channel = channel;
+ msg->radar = radar;
+ msg->radar_type = radar_type;
- fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS;
- cts->frame_control = cpu_to_le16(fctl);
- cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl);
- memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
+ ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
+ return 0;
}
-EXPORT_SYMBOL(ieee80211_ctstoself_get);
+EXPORT_SYMBOL(ieee80211_radar_status);
-struct sk_buff *
-ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id,
- struct ieee80211_tx_control *control)
+void ieee80211_key_threshold_notify(struct net_device *dev,
+ struct ieee80211_key *key,
+ struct sta_info *sta)
{
- struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sk_buff *skb;
- struct sta_info *sta;
- ieee80211_tx_handler *handler;
- struct ieee80211_txrx_data tx;
- ieee80211_txrx_result res = TXRX_DROP;
- struct net_device *bdev;
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_if_ap *bss = NULL;
-
- bdev = dev_get_by_index(if_id);
- if (bdev) {
- sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
- bss = &sdata->u.ap;
- dev_put(bdev);
- }
- if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head)
- return NULL;
-
- if (bss->dtim_count != 0)
- return NULL; /* send buffered bc/mc only after DTIM beacon */
- memset(control, 0, sizeof(*control));
- while (1) {
- skb = skb_dequeue(&bss->ps_bc_buf);
- if (!skb)
- return NULL;
- local->total_ps_buffered--;
-
- if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) {
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) skb->data;
- /* more buffered multicast/broadcast frames ==> set
- * MoreData flag in IEEE 802.11 header to inform PS
- * STAs */
- hdr->frame_control |=
- cpu_to_le16(IEEE80211_FCTL_MOREDATA);
- }
-
- if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0)
- break;
- dev_kfree_skb_any(skb);
- }
- sta = tx.sta;
- tx.u.tx.ps_buffered = 1;
+ struct ieee80211_msg_key_notification *msg;
- for (handler = local->tx_handlers; *handler != NULL; handler++) {
- res = (*handler)(&tx);
- if (res == TXRX_DROP || res == TXRX_QUEUED)
- break;
- }
- dev_put(tx.dev);
- skb = tx.skb; /* handlers are allowed to change skb */
+ /* if no one will get it anyway, don't even allocate it.
+ * unlikely because this is only relevant for APs
+ * where the device must be open... */
+ if (unlikely(!local->apdev))
+ return;
- if (res == TXRX_DROP) {
- I802_DEBUG_INC(local->tx_handlers_drop);
- dev_kfree_skb(skb);
- skb = NULL;
- } else if (res == TXRX_QUEUED) {
- I802_DEBUG_INC(local->tx_handlers_queued);
- skb = NULL;
- }
+ skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
+ sizeof(struct ieee80211_msg_key_notification));
+ if (!skb)
+ return;
+ skb_reserve(skb, sizeof(struct ieee80211_frame_info));
+ msg = (struct ieee80211_msg_key_notification *)
+ skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
+ msg->tx_rx_count = key->tx_rx_count;
+ memcpy(msg->ifname, dev->name, IFNAMSIZ);
if (sta)
- sta_info_put(sta);
-
- return skb;
-}
-EXPORT_SYMBOL(ieee80211_get_buffered_bc);
-
-static int __ieee80211_if_config(struct net_device *dev,
- struct sk_buff *beacon,
- struct ieee80211_tx_control *control)
-{
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_if_conf conf;
- static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
-
- if (!local->ops->config_interface || !netif_running(dev))
- return 0;
+ memcpy(msg->addr, sta->addr, ETH_ALEN);
+ else
+ memset(msg->addr, 0xff, ETH_ALEN);
- memset(&conf, 0, sizeof(conf));
- conf.type = sdata->type;
- if (sdata->type == IEEE80211_IF_TYPE_STA ||
- sdata->type == IEEE80211_IF_TYPE_IBSS) {
- if (local->sta_scanning &&
- local->scan_dev == dev)
- conf.bssid = scan_bssid;
- else
- conf.bssid = sdata->u.sta.bssid;
- conf.ssid = sdata->u.sta.ssid;
- conf.ssid_len = sdata->u.sta.ssid_len;
- conf.generic_elem = sdata->u.sta.extra_ie;
- conf.generic_elem_len = sdata->u.sta.extra_ie_len;
- } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
- conf.ssid = sdata->u.ap.ssid;
- conf.ssid_len = sdata->u.ap.ssid_len;
- conf.generic_elem = sdata->u.ap.generic_elem;
- conf.generic_elem_len = sdata->u.ap.generic_elem_len;
- conf.beacon = beacon;
- conf.beacon_control = control;
- }
- return local->ops->config_interface(local_to_hw(local),
- dev->ifindex, &conf);
-}
+ key->tx_rx_count = 0;
-int ieee80211_if_config(struct net_device *dev)
-{
- return __ieee80211_if_config(dev, NULL, NULL);
+ ieee80211_rx_mgmt(local, skb, NULL,
+ ieee80211_msg_key_threshold_notification);
}
-int ieee80211_if_config_beacon(struct net_device *dev)
+static int ieee80211_mgmt_open(struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_tx_control control;
- struct sk_buff *skb;
- if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
- return 0;
- skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
- if (!skb)
- return -ENOMEM;
- return __ieee80211_if_config(dev, skb, &control);
+ if (!netif_running(local->mdev))
+ return -EOPNOTSUPP;
+ return 0;
}
-int ieee80211_hw_config(struct ieee80211_local *local)
+static int ieee80211_mgmt_stop(struct net_device *dev)
{
- struct ieee80211_hw_mode *mode;
- struct ieee80211_channel *chan;
- int ret = 0;
-
- if (local->sta_scanning) {
- chan = local->scan_channel;
- mode = local->scan_hw_mode;
- } else {
- chan = local->oper_channel;
- mode = local->oper_hw_mode;
- }
-
- local->hw.conf.channel = chan->chan;
- local->hw.conf.channel_val = chan->val;
- local->hw.conf.power_level = chan->power_level;
- local->hw.conf.freq = chan->freq;
- local->hw.conf.phymode = mode->mode;
- local->hw.conf.antenna_max = chan->antenna_max;
- local->hw.conf.chan = chan;
- local->hw.conf.mode = mode;
-
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
- "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
- local->hw.conf.phymode);
-#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
-
- if (local->ops->config)
- ret = local->ops->config(local_to_hw(local), &local->hw.conf);
-
- return ret;
+ return 0;
}
-
-static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
+static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
{
/* FIX: what would be proper limits for MTU?
- * This interface uses 802.3 frames. */
- if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
+ * This interface uses 802.11 frames. */
+ if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
printk(KERN_WARNING "%s: invalid MTU %d\n",
dev->name, new_mtu);
return -EINVAL;
@@ -2388,12 +295,27 @@ static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
+void ieee80211_if_mgmt_setup(struct net_device *dev)
+{
+ ether_setup(dev);
+ dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
+ dev->change_mtu = ieee80211_change_mtu_apdev;
+ dev->get_stats = ieee80211_get_stats;
+ dev->open = ieee80211_mgmt_open;
+ dev->stop = ieee80211_mgmt_stop;
+ dev->type = ARPHRD_IEEE80211_PRISM;
+ dev->hard_header_parse = header_parse_80211;
+ dev->uninit = ieee80211_if_reinit;
+ dev->destructor = ieee80211_if_free;
+}
-static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
+/* regular interfaces */
+
+static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
{
/* FIX: what would be proper limits for MTU?
- * This interface uses 802.11 frames. */
- if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
+ * This interface uses 802.3 frames. */
+ if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
printk(KERN_WARNING "%s: invalid MTU %d\n",
dev->name, new_mtu);
return -EINVAL;
@@ -2406,121 +328,6 @@ static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
return 0;
}
-enum netif_tx_lock_class {
- TX_LOCK_NORMAL,
- TX_LOCK_MASTER,
-};
-
-static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
-{
- spin_lock_nested(&dev->_xmit_lock, subclass);
- dev->xmit_lock_owner = smp_processor_id();
-}
-
-static void ieee80211_set_multicast_list(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- unsigned short flags;
-
- netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
- if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
- if (sdata->allmulti) {
- sdata->allmulti = 0;
- local->iff_allmultis--;
- } else {
- sdata->allmulti = 1;
- local->iff_allmultis++;
- }
- }
- if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
- if (sdata->promisc) {
- sdata->promisc = 0;
- local->iff_promiscs--;
- } else {
- sdata->promisc = 1;
- local->iff_promiscs++;
- }
- }
- if (dev->mc_count != sdata->mc_count) {
- local->mc_count = local->mc_count - sdata->mc_count +
- dev->mc_count;
- sdata->mc_count = dev->mc_count;
- }
- if (local->ops->set_multicast_list) {
- flags = local->mdev->flags;
- if (local->iff_allmultis)
- flags |= IFF_ALLMULTI;
- if (local->iff_promiscs)
- flags |= IFF_PROMISC;
- read_lock(&local->sub_if_lock);
- local->ops->set_multicast_list(local_to_hw(local), flags,
- local->mc_count);
- read_unlock(&local->sub_if_lock);
- }
- netif_tx_unlock(local->mdev);
-}
-
-struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
- struct dev_mc_list *prev,
- void **ptr)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_sub_if_data *sdata = *ptr;
- struct dev_mc_list *mc;
-
- if (!prev) {
- WARN_ON(sdata);
- sdata = NULL;
- }
- if (!prev || !prev->next) {
- if (sdata)
- sdata = list_entry(sdata->list.next,
- struct ieee80211_sub_if_data, list);
- else
- sdata = list_entry(local->sub_if_list.next,
- struct ieee80211_sub_if_data, list);
- if (&sdata->list != &local->sub_if_list)
- mc = sdata->dev->mc_list;
- else
- mc = NULL;
- } else
- mc = prev->next;
-
- *ptr = sdata;
- return mc;
-}
-EXPORT_SYMBOL(ieee80211_get_mc_list_item);
-
-static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
-{
- struct ieee80211_sub_if_data *sdata;
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- return &(sdata->stats);
-}
-
-static void ieee80211_if_shutdown(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- ASSERT_RTNL();
- switch (sdata->type) {
- case IEEE80211_IF_TYPE_STA:
- case IEEE80211_IF_TYPE_IBSS:
- sdata->u.sta.state = IEEE80211_DISABLED;
- del_timer_sync(&sdata->u.sta.timer);
- skb_queue_purge(&sdata->u.sta.skb_queue);
- if (!local->ops->hw_scan &&
- local->scan_dev == sdata->dev) {
- local->sta_scanning = 0;
- cancel_delayed_work(&local->scan_work);
- }
- flush_workqueue(local->hw.workqueue);
- break;
- }
-}
-
static inline int identical_mac_addr_allowed(int type1, int type2)
{
return (type1 == IEEE80211_IF_TYPE_MNTR ||
@@ -2537,51 +344,6 @@ static inline int identical_mac_addr_allowed(int type1, int type2)
type2 == IEEE80211_IF_TYPE_VLAN)));
}
-static int ieee80211_master_open(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata;
- int res = -EOPNOTSUPP;
-
- read_lock(&local->sub_if_lock);
- list_for_each_entry(sdata, &local->sub_if_list, list) {
- if (sdata->dev != dev && netif_running(sdata->dev)) {
- res = 0;
- break;
- }
- }
- read_unlock(&local->sub_if_lock);
- return res;
-}
-
-static int ieee80211_master_stop(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata;
-
- read_lock(&local->sub_if_lock);
- list_for_each_entry(sdata, &local->sub_if_list, list)
- if (sdata->dev != dev && netif_running(sdata->dev))
- dev_close(sdata->dev);
- read_unlock(&local->sub_if_lock);
-
- return 0;
-}
-
-static int ieee80211_mgmt_open(struct net_device *dev)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-
- if (!netif_running(local->mdev))
- return -EOPNOTSUPP;
- return 0;
-}
-
-static int ieee80211_mgmt_stop(struct net_device *dev)
-{
- return 0;
-}
-
/* Check if running monitor interfaces should go to a "soft monitor" mode
* and switch them if necessary. */
static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
@@ -2613,6 +375,18 @@ static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
}
}
+static void ieee80211_if_open(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ switch (sdata->type) {
+ case IEEE80211_IF_TYPE_STA:
+ case IEEE80211_IF_TYPE_IBSS:
+ sdata->u.sta.prev_bssid_set = 0;
+ break;
+ }
+}
+
static int ieee80211_open(struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata, *nsdata;
@@ -2646,11 +420,15 @@ static int ieee80211_open(struct net_device *dev)
local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
return 0;
}
+ ieee80211_if_open(dev);
ieee80211_start_soft_monitor(local);
conf.if_id = dev->ifindex;
conf.type = sdata->type;
- conf.mac_addr = dev->dev_addr;
+ if (sdata->type == IEEE80211_IF_TYPE_MNTR)
+ conf.mac_addr = NULL;
+ else
+ conf.mac_addr = dev->dev_addr;
res = local->ops->add_interface(local_to_hw(local), &conf);
if (res) {
if (sdata->type == IEEE80211_IF_TYPE_MNTR)
@@ -2689,8 +467,10 @@ static int ieee80211_open(struct net_device *dev)
if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
local->monitors++;
local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
- } else
+ } else {
ieee80211_if_config(dev);
+ ieee80211_reset_erp_info(dev);
+ }
if (sdata->type == IEEE80211_IF_TYPE_STA &&
!local->user_space_mlme)
@@ -2702,6 +482,27 @@ static int ieee80211_open(struct net_device *dev)
return 0;
}
+static void ieee80211_if_shutdown(struct net_device *dev)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ ASSERT_RTNL();
+ switch (sdata->type) {
+ case IEEE80211_IF_TYPE_STA:
+ case IEEE80211_IF_TYPE_IBSS:
+ sdata->u.sta.state = IEEE80211_DISABLED;
+ del_timer_sync(&sdata->u.sta.timer);
+ skb_queue_purge(&sdata->u.sta.skb_queue);
+ if (!local->ops->hw_scan &&
+ local->scan_dev == sdata->dev) {
+ local->sta_scanning = 0;
+ cancel_delayed_work(&local->scan_work);
+ }
+ flush_workqueue(local->hw.workqueue);
+ break;
+ }
+}
static int ieee80211_stop(struct net_device *dev)
{
@@ -2755,1524 +556,254 @@ static int ieee80211_stop(struct net_device *dev)
return 0;
}
+enum netif_tx_lock_class {
+ TX_LOCK_NORMAL,
+ TX_LOCK_MASTER,
+};
-static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
-{
- memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
- return ETH_ALEN;
-}
-
-static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
+static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
{
- return compare_ether_addr(raddr, addr) == 0 ||
- is_broadcast_ether_addr(raddr);
+ spin_lock_nested(&dev->_xmit_lock, subclass);
+ dev->xmit_lock_owner = smp_processor_id();
}
-
-static ieee80211_txrx_result
-ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
+static void ieee80211_set_multicast_list(struct net_device *dev)
{
- struct net_device *dev = rx->dev;
- struct ieee80211_local *local = rx->local;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
- u16 fc, hdrlen, ethertype;
- u8 *payload;
- u8 dst[ETH_ALEN];
- u8 src[ETH_ALEN];
- struct sk_buff *skb = rx->skb, *skb2;
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ unsigned short flags;
- fc = rx->fc;
- if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
- return TXRX_CONTINUE;
-
- if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
- return TXRX_DROP;
-
- hdrlen = ieee80211_get_hdrlen(fc);
-
- /* convert IEEE 802.11 header + possible LLC headers into Ethernet
- * header
- * IEEE 802.11 address fields:
- * ToDS FromDS Addr1 Addr2 Addr3 Addr4
- * 0 0 DA SA BSSID n/a
- * 0 1 DA BSSID SA n/a
- * 1 0 BSSID SA DA n/a
- * 1 1 RA TA DA SA
- */
-
- switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
- case IEEE80211_FCTL_TODS:
- /* BSSID SA DA */
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
-
- if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP &&
- sdata->type != IEEE80211_IF_TYPE_VLAN)) {
- printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID="
- MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n",
- dev->name, MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3));
- return TXRX_DROP;
- }
- break;
- case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
- /* RA TA DA SA */
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr4, ETH_ALEN);
-
- if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) {
- printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA="
- MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA="
- MAC_FMT ")\n",
- rx->dev->name, MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3),
- MAC_ARG(hdr->addr4));
- return TXRX_DROP;
- }
- break;
- case IEEE80211_FCTL_FROMDS:
- /* DA BSSID SA */
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr3, ETH_ALEN);
-
- if (sdata->type != IEEE80211_IF_TYPE_STA) {
- return TXRX_DROP;
- }
- break;
- case 0:
- /* DA SA BSSID */
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
-
- if (sdata->type != IEEE80211_IF_TYPE_IBSS) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: dropped IBSS frame (DA="
- MAC_FMT " SA=" MAC_FMT " BSSID=" MAC_FMT
- ")\n",
- dev->name, MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2),
- MAC_ARG(hdr->addr3));
- }
- return TXRX_DROP;
- }
- break;
- }
-
- payload = skb->data + hdrlen;
-
- if (unlikely(skb->len - hdrlen < 8)) {
- if (net_ratelimit()) {
- printk(KERN_DEBUG "%s: RX too short data frame "
- "payload\n", dev->name);
+ netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
+ if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
+ if (sdata->allmulti) {
+ sdata->allmulti = 0;
+ local->iff_allmultis--;
+ } else {
+ sdata->allmulti = 1;
+ local->iff_allmultis++;
}
- return TXRX_DROP;
- }
-
- ethertype = (payload[6] << 8) | payload[7];
-
- if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
- ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
- compare_ether_addr(payload, bridge_tunnel_header) == 0)) {
- /* remove RFC1042 or Bridge-Tunnel encapsulation and
- * replace EtherType */
- skb_pull(skb, hdrlen + 6);
- memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
- memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
- } else {
- struct ethhdr *ehdr;
- __be16 len;
- skb_pull(skb, hdrlen);
- len = htons(skb->len);
- ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
- memcpy(ehdr->h_dest, dst, ETH_ALEN);
- memcpy(ehdr->h_source, src, ETH_ALEN);
- ehdr->h_proto = len;
}
- skb->dev = dev;
-
- skb2 = NULL;
-
- sdata->stats.rx_packets++;
- sdata->stats.rx_bytes += skb->len;
-
- if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP
- || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) {
- if (is_multicast_ether_addr(skb->data)) {
- /* send multicast frames both to higher layers in
- * local net stack and back to the wireless media */
- skb2 = skb_copy(skb, GFP_ATOMIC);
- if (!skb2)
- printk(KERN_DEBUG "%s: failed to clone "
- "multicast frame\n", dev->name);
+ if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
+ if (sdata->promisc) {
+ sdata->promisc = 0;
+ local->iff_promiscs--;
} else {
- struct sta_info *dsta;
- dsta = sta_info_get(local, skb->data);
- if (dsta && !dsta->dev) {
- printk(KERN_DEBUG "Station with null dev "
- "structure!\n");
- } else if (dsta && dsta->dev == dev) {
- /* Destination station is associated to this
- * AP, so send the frame directly to it and
- * do not pass the frame to local net stack.
- */
- skb2 = skb;
- skb = NULL;
- }
- if (dsta)
- sta_info_put(dsta);
+ sdata->promisc = 1;
+ local->iff_promiscs++;
}
}
-
- if (skb) {
- /* deliver to local stack */
- skb->protocol = eth_type_trans(skb, dev);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
- }
-
- if (skb2) {
- /* send to wireless media */
- skb2->protocol = __constant_htons(ETH_P_802_3);
- skb_set_network_header(skb2, 0);
- skb_set_mac_header(skb2, 0);
- dev_queue_xmit(skb2);
+ if (dev->mc_count != sdata->mc_count) {
+ local->mc_count = local->mc_count - sdata->mc_count +
+ dev->mc_count;
+ sdata->mc_count = dev->mc_count;
}
-
- return TXRX_QUEUED;
-}
-
-
-static struct ieee80211_rate *
-ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
-{
- struct ieee80211_hw_mode *mode;
- int r;
-
- list_for_each_entry(mode, &local->modes_list, list) {
- if (mode->mode != phymode)
- continue;
- for (r = 0; r < mode->num_rates; r++) {
- struct ieee80211_rate *rate = &mode->rates[r];
- if (rate->val == hw_rate ||
- (rate->flags & IEEE80211_RATE_PREAMBLE2 &&
- rate->val2 == hw_rate))
- return rate;
- }
+ if (local->ops->set_multicast_list) {
+ flags = local->mdev->flags;
+ if (local->iff_allmultis)
+ flags |= IFF_ALLMULTI;
+ if (local->iff_promiscs)
+ flags |= IFF_PROMISC;
+ read_lock(&local->sub_if_lock);
+ local->ops->set_multicast_list(local_to_hw(local), flags,
+ local->mc_count);
+ read_unlock(&local->sub_if_lock);
}
-
- return NULL;
+ netif_tx_unlock(local->mdev);
}
-static void
-ieee80211_fill_frame_info(struct ieee80211_local *local,
- struct ieee80211_frame_info *fi,
- struct ieee80211_rx_status *status)
+/* Must not be called for mdev and apdev */
+void ieee80211_if_setup(struct net_device *dev)
{
- if (status) {
- struct timespec ts;
- struct ieee80211_rate *rate;
-
- jiffies_to_timespec(jiffies, &ts);
- fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
- ts.tv_nsec / 1000);
- fi->mactime = cpu_to_be64(status->mactime);
- switch (status->phymode) {
- case MODE_IEEE80211A:
- fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
- break;
- case MODE_IEEE80211B:
- fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
- break;
- case MODE_IEEE80211G:
- fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
- break;
- case MODE_ATHEROS_TURBO:
- fi->phytype =
- htonl(ieee80211_phytype_dsss_dot11_turbo);
- break;
- default:
- fi->phytype = htonl(0xAAAAAAAA);
- break;
- }
- fi->channel = htonl(status->channel);
- rate = ieee80211_get_rate(local, status->phymode,
- status->rate);
- if (rate) {
- fi->datarate = htonl(rate->rate);
- if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
- if (status->rate == rate->val)
- fi->preamble = htonl(2); /* long */
- else if (status->rate == rate->val2)
- fi->preamble = htonl(1); /* short */
- } else
- fi->preamble = htonl(0);
- } else {
- fi->datarate = htonl(0);
- fi->preamble = htonl(0);
- }
-
- fi->antenna = htonl(status->antenna);
- fi->priority = htonl(0xffffffff); /* no clue */
- fi->ssi_type = htonl(ieee80211_ssi_raw);
- fi->ssi_signal = htonl(status->ssi);
- fi->ssi_noise = 0x00000000;
- fi->encoding = 0;
- } else {
- /* clear everything because we really don't know.
- * the msg_type field isn't present on monitor frames
- * so we don't know whether it will be present or not,
- * but it's ok to not clear it since it'll be assigned
- * anyway */
- memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
-
- fi->ssi_type = htonl(ieee80211_ssi_none);
- }
- fi->version = htonl(IEEE80211_FI_VERSION);
- fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
+ ether_setup(dev);
+ dev->hard_start_xmit = ieee80211_subif_start_xmit;
+ dev->wireless_handlers = &ieee80211_iw_handler_def;
+ dev->set_multicast_list = ieee80211_set_multicast_list;
+ dev->change_mtu = ieee80211_change_mtu;
+ dev->get_stats = ieee80211_get_stats;
+ dev->open = ieee80211_open;
+ dev->stop = ieee80211_stop;
+ dev->uninit = ieee80211_if_reinit;
+ dev->destructor = ieee80211_if_free;
}
-/* this routine is actually not just for this, but also
- * for pushing fake 'management' frames into userspace.
- * it shall be replaced by a netlink-based system. */
-void
-ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
- struct ieee80211_rx_status *status, u32 msg_type)
-{
- struct ieee80211_frame_info *fi;
- const size_t hlen = sizeof(struct ieee80211_frame_info);
- struct ieee80211_sub_if_data *sdata;
-
- skb->dev = local->apdev;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
-
- if (skb_headroom(skb) < hlen) {
- I802_DEBUG_INC(local->rx_expand_skb_head);
- if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
- dev_kfree_skb(skb);
- return;
- }
- }
-
- fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
-
- ieee80211_fill_frame_info(local, fi, status);
- fi->msg_type = htonl(msg_type);
-
- sdata->stats.rx_packets++;
- sdata->stats.rx_bytes += skb->len;
+/* WDS specialties */
- skb_set_mac_header(skb, 0);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- skb->pkt_type = PACKET_OTHERHOST;
- skb->protocol = htons(ETH_P_802_2);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
-}
-
-static void
-ieee80211_rx_monitor(struct net_device *dev, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
+int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_rate *rate;
- struct ieee80211_rtap_hdr {
- struct ieee80211_radiotap_header hdr;
- u8 flags;
- u8 rate;
- __le16 chan_freq;
- __le16 chan_flags;
- u8 antsignal;
- } __attribute__ ((packed)) *rthdr;
-
- skb->dev = dev;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
- if (status->flag & RX_FLAG_RADIOTAP)
- goto out;
-
- if (skb_headroom(skb) < sizeof(*rthdr)) {
- I802_DEBUG_INC(local->rx_expand_skb_head);
- if (pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) {
- dev_kfree_skb(skb);
- return;
- }
- }
-
- rthdr = (struct ieee80211_rtap_hdr *) skb_push(skb, sizeof(*rthdr));
- memset(rthdr, 0, sizeof(*rthdr));
- rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
- rthdr->hdr.it_present =
- cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
- (1 << IEEE80211_RADIOTAP_RATE) |
- (1 << IEEE80211_RADIOTAP_CHANNEL) |
- (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL));
- rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ?
- IEEE80211_RADIOTAP_F_FCS : 0;
- rate = ieee80211_get_rate(local, status->phymode, status->rate);
- if (rate)
- rthdr->rate = rate->rate / 5;
- rthdr->chan_freq = cpu_to_le16(status->freq);
- rthdr->chan_flags =
- status->phymode == MODE_IEEE80211A ?
- cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ) :
- cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ);
- rthdr->antsignal = status->ssi;
-
- out:
- sdata->stats.rx_packets++;
- sdata->stats.rx_bytes += skb->len;
-
- skb_set_mac_header(skb, 0);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- skb->pkt_type = PACKET_OTHERHOST;
- skb->protocol = htons(ETH_P_802_2);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
-}
-
-int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
- int radar, int radar_type)
-{
- struct sk_buff *skb;
- struct ieee80211_radar_info *msg;
- struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct sta_info *sta;
- if (!local->apdev)
+ if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
return 0;
- skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
- sizeof(struct ieee80211_radar_info));
-
- if (!skb)
+ /* Create STA entry for the new peer */
+ sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
+ if (!sta)
return -ENOMEM;
- skb_reserve(skb, sizeof(struct ieee80211_frame_info));
-
- msg = (struct ieee80211_radar_info *)
- skb_put(skb, sizeof(struct ieee80211_radar_info));
- msg->channel = channel;
- msg->radar = radar;
- msg->radar_type = radar_type;
-
- ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
- return 0;
-}
-EXPORT_SYMBOL(ieee80211_radar_status);
-
-
-static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta)
-{
- struct ieee80211_sub_if_data *sdata;
- sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
-
- if (sdata->bss)
- atomic_inc(&sdata->bss->num_sta_ps);
- sta->flags |= WLAN_STA_PS;
- sta->pspoll = 0;
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d enters power "
- "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
-}
-
-
-static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct sk_buff *skb;
- int sent = 0;
- struct ieee80211_sub_if_data *sdata;
- struct ieee80211_tx_packet_data *pkt_data;
-
- sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
- if (sdata->bss)
- atomic_dec(&sdata->bss->num_sta_ps);
- sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM);
- sta->pspoll = 0;
- if (!skb_queue_empty(&sta->ps_tx_buf)) {
- if (local->ops->set_tim)
- local->ops->set_tim(local_to_hw(local), sta->aid, 0);
- if (sdata->bss)
- bss_tim_clear(local, sdata->bss, sta->aid);
- }
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d exits power "
- "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- /* Send all buffered frames to the station */
- while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
- sent++;
- pkt_data->requeue = 1;
- dev_queue_xmit(skb);
- }
- while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
- pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
- local->total_ps_buffered--;
- sent++;
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d send PS frame "
- "since STA not sleeping anymore\n", dev->name,
- MAC_ARG(sta->addr), sta->aid);
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- pkt_data->requeue = 1;
- dev_queue_xmit(skb);
- }
-
- return sent;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx)
-{
- struct sk_buff *skb;
- int no_pending_pkts;
-
- if (likely(!rx->sta ||
- (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL ||
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL ||
- !rx->u.rx.ra_match))
- return TXRX_CONTINUE;
-
- skb = skb_dequeue(&rx->sta->tx_filtered);
- if (!skb) {
- skb = skb_dequeue(&rx->sta->ps_tx_buf);
- if (skb)
- rx->local->total_ps_buffered--;
- }
- no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
- skb_queue_empty(&rx->sta->ps_tx_buf);
-
- if (skb) {
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) skb->data;
-
- /* tell TX path to send one frame even though the STA may
- * still remain is PS mode after this frame exchange */
- rx->sta->pspoll = 1;
-
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS Poll (entries "
- "after %d)\n",
- MAC_ARG(rx->sta->addr), rx->sta->aid,
- skb_queue_len(&rx->sta->ps_tx_buf));
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
-
- /* Use MoreData flag to indicate whether there are more
- * buffered frames for this STA */
- if (no_pending_pkts) {
- hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
- rx->sta->flags &= ~WLAN_STA_TIM;
- } else
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
-
- dev_queue_xmit(skb);
-
- if (no_pending_pkts) {
- if (rx->local->ops->set_tim)
- rx->local->ops->set_tim(local_to_hw(rx->local),
- rx->sta->aid, 0);
- if (rx->sdata->bss)
- bss_tim_clear(rx->local, rx->sdata->bss, rx->sta->aid);
- }
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- } else if (!rx->u.rx.sent_ps_buffered) {
- printk(KERN_DEBUG "%s: STA " MAC_FMT " sent PS Poll even "
- "though there is no buffered frames for it\n",
- rx->dev->name, MAC_ARG(rx->sta->addr));
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
-
- }
-
- /* Free PS Poll skb here instead of returning TXRX_DROP that would
- * count as an dropped frame. */
- dev_kfree_skb(rx->skb);
-
- return TXRX_QUEUED;
-}
-
-
-static inline struct ieee80211_fragment_entry *
-ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
- unsigned int frag, unsigned int seq, int rx_queue,
- struct sk_buff **skb)
-{
- struct ieee80211_fragment_entry *entry;
- int idx;
-
- idx = sdata->fragment_next;
- entry = &sdata->fragments[sdata->fragment_next++];
- if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
- sdata->fragment_next = 0;
-
- if (!skb_queue_empty(&entry->skb_list)) {
-#ifdef CONFIG_MAC80211_DEBUG
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) entry->skb_list.next->data;
- printk(KERN_DEBUG "%s: RX reassembly removed oldest "
- "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
- "addr1=" MAC_FMT " addr2=" MAC_FMT "\n",
- sdata->dev->name, idx,
- jiffies - entry->first_frag_time, entry->seq,
- entry->last_frag, MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2));
-#endif /* CONFIG_MAC80211_DEBUG */
- __skb_queue_purge(&entry->skb_list);
- }
-
- __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
- *skb = NULL;
- entry->first_frag_time = jiffies;
- entry->seq = seq;
- entry->rx_queue = rx_queue;
- entry->last_frag = frag;
- entry->ccmp = 0;
- entry->extra_len = 0;
-
- return entry;
-}
-
-
-static inline struct ieee80211_fragment_entry *
-ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
- u16 fc, unsigned int frag, unsigned int seq,
- int rx_queue, struct ieee80211_hdr *hdr)
-{
- struct ieee80211_fragment_entry *entry;
- int i, idx;
-
- idx = sdata->fragment_next;
- for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
- struct ieee80211_hdr *f_hdr;
- u16 f_fc;
-
- idx--;
- if (idx < 0)
- idx = IEEE80211_FRAGMENT_MAX - 1;
-
- entry = &sdata->fragments[idx];
- if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
- entry->rx_queue != rx_queue ||
- entry->last_frag + 1 != frag)
- continue;
-
- f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data;
- f_fc = le16_to_cpu(f_hdr->frame_control);
-
- if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) ||
- compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 ||
- compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0)
- continue;
-
- if (entry->first_frag_time + 2 * HZ < jiffies) {
- __skb_queue_purge(&entry->skb_list);
- continue;
- }
- return entry;
- }
-
- return NULL;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_hdr *hdr;
- u16 sc;
- unsigned int frag, seq;
- struct ieee80211_fragment_entry *entry;
- struct sk_buff *skb;
-
- hdr = (struct ieee80211_hdr *) rx->skb->data;
- sc = le16_to_cpu(hdr->seq_ctrl);
- frag = sc & IEEE80211_SCTL_FRAG;
-
- if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) ||
- (rx->skb)->len < 24 ||
- is_multicast_ether_addr(hdr->addr1))) {
- /* not fragmented */
- goto out;
- }
- I802_DEBUG_INC(rx->local->rx_handlers_fragments);
-
- seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
-
- if (frag == 0) {
- /* This is the first fragment of a new frame. */
- entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
- rx->u.rx.queue, &(rx->skb));
- if (rx->key && rx->key->alg == ALG_CCMP &&
- (rx->fc & IEEE80211_FCTL_PROTECTED)) {
- /* Store CCMP PN so that we can verify that the next
- * fragment has a sequential PN value. */
- entry->ccmp = 1;
- memcpy(entry->last_pn,
- rx->key->u.ccmp.rx_pn[rx->u.rx.queue],
- CCMP_PN_LEN);
- }
- return TXRX_QUEUED;
- }
-
- /* This is a fragment for a frame that should already be pending in
- * fragment cache. Add this fragment to the end of the pending entry.
- */
- entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq,
- rx->u.rx.queue, hdr);
- if (!entry) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
- return TXRX_DROP;
- }
-
- /* Verify that MPDUs within one MSDU have sequential PN values.
- * (IEEE 802.11i, 8.3.3.4.5) */
- if (entry->ccmp) {
- int i;
- u8 pn[CCMP_PN_LEN], *rpn;
- if (!rx->key || rx->key->alg != ALG_CCMP)
- return TXRX_DROP;
- memcpy(pn, entry->last_pn, CCMP_PN_LEN);
- for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
- pn[i]++;
- if (pn[i])
- break;
- }
- rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
- if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
- printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential"
- " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x "
- "(expected %02x%02x%02x%02x%02x%02x)\n",
- rx->dev->name, MAC_ARG(hdr->addr2),
- rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5],
- pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]);
- return TXRX_DROP;
- }
- memcpy(entry->last_pn, pn, CCMP_PN_LEN);
- }
-
- skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc));
- __skb_queue_tail(&entry->skb_list, rx->skb);
- entry->last_frag = frag;
- entry->extra_len += rx->skb->len;
- if (rx->fc & IEEE80211_FCTL_MOREFRAGS) {
- rx->skb = NULL;
- return TXRX_QUEUED;
- }
-
- rx->skb = __skb_dequeue(&entry->skb_list);
- if (skb_tailroom(rx->skb) < entry->extra_len) {
- I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
- if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
- GFP_ATOMIC))) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
- __skb_queue_purge(&entry->skb_list);
- return TXRX_DROP;
- }
- }
- while ((skb = __skb_dequeue(&entry->skb_list))) {
- memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
- dev_kfree_skb(skb);
- }
-
- /* Complete frame has been reassembled - process it now */
- rx->fragmented = 1;
-
- out:
- if (rx->sta)
- rx->sta->rx_packets++;
- if (is_multicast_ether_addr(hdr->addr1))
- rx->local->dot11MulticastReceivedFrameCount++;
- else
- ieee80211_led_rx(rx->local);
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx)
-{
- if (rx->sdata->type == IEEE80211_IF_TYPE_MNTR) {
- ieee80211_rx_monitor(rx->dev, rx->skb, rx->u.rx.status);
- return TXRX_QUEUED;
- }
-
- if (rx->u.rx.status->flag & RX_FLAG_RADIOTAP)
- skb_pull(rx->skb, ieee80211_get_radiotap_len(rx->skb));
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_hdr *hdr;
- int always_sta_key;
- hdr = (struct ieee80211_hdr *) rx->skb->data;
-
- /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
- if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
- if (unlikely(rx->fc & IEEE80211_FCTL_RETRY &&
- rx->sta->last_seq_ctrl[rx->u.rx.queue] ==
- hdr->seq_ctrl)) {
- if (rx->u.rx.ra_match) {
- rx->local->dot11FrameDuplicateCount++;
- rx->sta->num_duplicates++;
- }
- return TXRX_DROP;
- } else
- rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl;
- }
-
- if ((rx->local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) &&
- rx->skb->len > FCS_LEN)
- skb_trim(rx->skb, rx->skb->len - FCS_LEN);
-
- if (unlikely(rx->skb->len < 16)) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
- return TXRX_DROP;
- }
-
- if (!rx->u.rx.ra_match)
- rx->skb->pkt_type = PACKET_OTHERHOST;
- else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0)
- rx->skb->pkt_type = PACKET_HOST;
- else if (is_multicast_ether_addr(hdr->addr1)) {
- if (is_broadcast_ether_addr(hdr->addr1))
- rx->skb->pkt_type = PACKET_BROADCAST;
- else
- rx->skb->pkt_type = PACKET_MULTICAST;
- } else
- rx->skb->pkt_type = PACKET_OTHERHOST;
-
- /* Drop disallowed frame classes based on STA auth/assoc state;
- * IEEE 802.11, Chap 5.5.
- *
- * 80211.o does filtering only based on association state, i.e., it
- * drops Class 3 frames from not associated stations. hostapd sends
- * deauth/disassoc frames when needed. In addition, hostapd is
- * responsible for filtering on both auth and assoc states.
- */
- if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA ||
- ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL &&
- (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) &&
- rx->sdata->type != IEEE80211_IF_TYPE_IBSS &&
- (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) {
- if ((!(rx->fc & IEEE80211_FCTL_FROMDS) &&
- !(rx->fc & IEEE80211_FCTL_TODS) &&
- (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
- || !rx->u.rx.ra_match) {
- /* Drop IBSS frames and frames for other hosts
- * silently. */
- return TXRX_DROP;
- }
-
- if (!rx->local->apdev)
- return TXRX_DROP;
-
- ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
- ieee80211_msg_sta_not_assoc);
- return TXRX_QUEUED;
- }
-
- if (rx->sdata->type == IEEE80211_IF_TYPE_STA)
- always_sta_key = 0;
- else
- always_sta_key = 1;
+ sta_info_put(sta);
- if (rx->sta && rx->sta->key && always_sta_key) {
- rx->key = rx->sta->key;
+ /* Remove STA entry for the old peer */
+ sta = sta_info_get(local, sdata->u.wds.remote_addr);
+ if (sta) {
+ sta_info_free(sta);
+ sta_info_put(sta);
} else {
- if (rx->sta && rx->sta->key)
- rx->key = rx->sta->key;
- else
- rx->key = rx->sdata->default_key;
-
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
- rx->fc & IEEE80211_FCTL_PROTECTED) {
- int keyidx = ieee80211_wep_get_keyidx(rx->skb);
-
- if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS &&
- (!rx->sta || !rx->sta->key || keyidx > 0))
- rx->key = rx->sdata->keys[keyidx];
-
- if (!rx->key) {
- if (!rx->u.rx.ra_match)
- return TXRX_DROP;
- printk(KERN_DEBUG "%s: RX WEP frame with "
- "unknown keyidx %d (A1=" MAC_FMT " A2="
- MAC_FMT " A3=" MAC_FMT ")\n",
- rx->dev->name, keyidx,
- MAC_ARG(hdr->addr1),
- MAC_ARG(hdr->addr2),
- MAC_ARG(hdr->addr3));
- if (!rx->local->apdev)
- return TXRX_DROP;
- ieee80211_rx_mgmt(
- rx->local, rx->skb, rx->u.rx.status,
- ieee80211_msg_wep_frame_unknown_key);
- return TXRX_QUEUED;
- }
- }
+ printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
+ "peer " MAC_FMT "\n",
+ dev->name, MAC_ARG(sdata->u.wds.remote_addr));
}
- if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) {
- rx->key->tx_rx_count++;
- if (unlikely(rx->local->key_tx_rx_threshold &&
- rx->key->tx_rx_count >
- rx->local->key_tx_rx_threshold)) {
- ieee80211_key_threshold_notify(rx->dev, rx->key,
- rx->sta);
- }
- }
+ /* Update WDS link data */
+ memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
- return TXRX_CONTINUE;
+ return 0;
}
+/* everything else */
-static ieee80211_txrx_result
-ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx)
+static int __ieee80211_if_config(struct net_device *dev,
+ struct sk_buff *beacon,
+ struct ieee80211_tx_control *control)
{
- struct sta_info *sta = rx->sta;
- struct net_device *dev = rx->dev;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
-
- if (!sta)
- return TXRX_CONTINUE;
-
- /* Update last_rx only for IBSS packets which are for the current
- * BSSID to avoid keeping the current IBSS network alive in cases where
- * other STAs are using different BSSID. */
- if (rx->sdata->type == IEEE80211_IF_TYPE_IBSS) {
- u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len);
- if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0)
- sta->last_rx = jiffies;
- } else
- if (!is_multicast_ether_addr(hdr->addr1) ||
- rx->sdata->type == IEEE80211_IF_TYPE_STA) {
- /* Update last_rx only for unicast frames in order to prevent
- * the Probe Request frames (the only broadcast frames from a
- * STA in infrastructure mode) from keeping a connection alive.
- */
- sta->last_rx = jiffies;
- }
-
- if (!rx->u.rx.ra_match)
- return TXRX_CONTINUE;
-
- sta->rx_fragments++;
- sta->rx_bytes += rx->skb->len;
- sta->last_rssi = (sta->last_rssi * 15 +
- rx->u.rx.status->ssi) / 16;
- sta->last_signal = (sta->last_signal * 15 +
- rx->u.rx.status->signal) / 16;
- sta->last_noise = (sta->last_noise * 15 +
- rx->u.rx.status->noise) / 16;
-
- if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) {
- /* Change STA power saving mode only in the end of a frame
- * exchange sequence */
- if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM))
- rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta);
- else if (!(sta->flags & WLAN_STA_PS) &&
- (rx->fc & IEEE80211_FCTL_PM))
- ap_sta_ps_start(dev, sta);
- }
-
- /* Drop data::nullfunc frames silently, since they are used only to
- * control station power saving mode. */
- if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) {
- I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
- /* Update counter and free packet here to avoid counting this
- * as a dropped packed. */
- sta->rx_packets++;
- dev_kfree_skb(rx->skb);
- return TXRX_QUEUED;
- }
-
- return TXRX_CONTINUE;
-} /* ieee80211_rx_h_sta_process */
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_if_conf conf;
+ static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+ if (!local->ops->config_interface || !netif_running(dev))
+ return 0;
-static ieee80211_txrx_result
-ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx)
-{
- if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
- (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
- !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match)
- return TXRX_CONTINUE;
-
- /* Check for weak IVs, if hwaccel did not remove IV from the frame */
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) ||
- rx->key->force_sw_encrypt) {
- u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key);
- if (iv) {
- rx->sta->wep_weak_iv_count++;
- }
+ memset(&conf, 0, sizeof(conf));
+ conf.type = sdata->type;
+ if (sdata->type == IEEE80211_IF_TYPE_STA ||
+ sdata->type == IEEE80211_IF_TYPE_IBSS) {
+ if (local->sta_scanning &&
+ local->scan_dev == dev)
+ conf.bssid = scan_bssid;
+ else
+ conf.bssid = sdata->u.sta.bssid;
+ conf.ssid = sdata->u.sta.ssid;
+ conf.ssid_len = sdata->u.sta.ssid_len;
+ conf.generic_elem = sdata->u.sta.extra_ie;
+ conf.generic_elem_len = sdata->u.sta.extra_ie_len;
+ } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
+ conf.ssid = sdata->u.ap.ssid;
+ conf.ssid_len = sdata->u.ap.ssid_len;
+ conf.generic_elem = sdata->u.ap.generic_elem;
+ conf.generic_elem_len = sdata->u.ap.generic_elem_len;
+ conf.beacon = beacon;
+ conf.beacon_control = control;
}
-
- return TXRX_CONTINUE;
+ return local->ops->config_interface(local_to_hw(local),
+ dev->ifindex, &conf);
}
-
-static ieee80211_txrx_result
-ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
+int ieee80211_if_config(struct net_device *dev)
{
- /* If the device handles decryption totally, skip this test */
- if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
- return TXRX_CONTINUE;
-
- if ((rx->key && rx->key->alg != ALG_WEP) ||
- !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
- ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
- ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
- return TXRX_CONTINUE;
-
- if (!rx->key) {
- printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
- rx->dev->name);
- return TXRX_DROP;
- }
-
- if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
- rx->key->force_sw_encrypt) {
- if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
- printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
- "failed\n", rx->dev->name);
- return TXRX_DROP;
- }
- } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
- ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
- /* remove ICV */
- skb_trim(rx->skb, rx->skb->len - 4);
- }
-
- return TXRX_CONTINUE;
+ return __ieee80211_if_config(dev, NULL, NULL);
}
-
-static ieee80211_txrx_result
-ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx)
+int ieee80211_if_config_beacon(struct net_device *dev)
{
- if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) &&
- rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) {
- /* Pass both encrypted and unencrypted EAPOL frames to user
- * space for processing. */
- if (!rx->local->apdev)
- return TXRX_DROP;
- ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
- ieee80211_msg_normal);
- return TXRX_QUEUED;
- }
-
- if (unlikely(rx->sdata->ieee802_1x &&
- (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
- (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) &&
- !ieee80211_is_eapol(rx->skb))) {
-#ifdef CONFIG_MAC80211_DEBUG
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) rx->skb->data;
- printk(KERN_DEBUG "%s: dropped frame from " MAC_FMT
- " (unauthorized port)\n", rx->dev->name,
- MAC_ARG(hdr->addr2));
-#endif /* CONFIG_MAC80211_DEBUG */
- return TXRX_DROP;
- }
-
- return TXRX_CONTINUE;
-}
-
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_tx_control control;
+ struct sk_buff *skb;
-static ieee80211_txrx_result
-ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
-{
- /* If the device handles decryption totally, skip this test */
- if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
- return TXRX_CONTINUE;
-
- /* Drop unencrypted frames if key is set. */
- if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) &&
- (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
- (rx->key || rx->sdata->drop_unencrypted) &&
- (rx->sdata->eapol == 0 ||
- !ieee80211_is_eapol(rx->skb)))) {
- printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
- "encryption\n", rx->dev->name);
- return TXRX_DROP;
- }
- return TXRX_CONTINUE;
+ if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
+ return 0;
+ skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
+ if (!skb)
+ return -ENOMEM;
+ return __ieee80211_if_config(dev, skb, &control);
}
-
-static ieee80211_txrx_result
-ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx)
+int ieee80211_hw_config(struct ieee80211_local *local)
{
- struct ieee80211_sub_if_data *sdata;
-
- if (!rx->u.rx.ra_match)
- return TXRX_DROP;
+ struct ieee80211_hw_mode *mode;
+ struct ieee80211_channel *chan;
+ int ret = 0;
- sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
- if ((sdata->type == IEEE80211_IF_TYPE_STA ||
- sdata->type == IEEE80211_IF_TYPE_IBSS) &&
- !rx->local->user_space_mlme) {
- ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status);
+ if (local->sta_scanning) {
+ chan = local->scan_channel;
+ mode = local->scan_hw_mode;
} else {
- /* Management frames are sent to hostapd for processing */
- if (!rx->local->apdev)
- return TXRX_DROP;
- ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
- ieee80211_msg_normal);
+ chan = local->oper_channel;
+ mode = local->oper_hw_mode;
}
- return TXRX_QUEUED;
-}
-
-static ieee80211_txrx_result
-ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_local *local = rx->local;
- struct sk_buff *skb = rx->skb;
+ local->hw.conf.channel = chan->chan;
+ local->hw.conf.channel_val = chan->val;
+ local->hw.conf.power_level = chan->power_level;
+ local->hw.conf.freq = chan->freq;
+ local->hw.conf.phymode = mode->mode;
+ local->hw.conf.antenna_max = chan->antenna_max;
+ local->hw.conf.chan = chan;
+ local->hw.conf.mode = mode;
- if (unlikely(local->sta_scanning != 0)) {
- ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status);
- return TXRX_QUEUED;
- }
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
+ "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
+ local->hw.conf.phymode);
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
- if (unlikely(rx->u.rx.in_scan)) {
- /* scanning finished during invoking of handlers */
- I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
- return TXRX_DROP;
- }
+ if (local->ops->config)
+ ret = local->ops->config(local_to_hw(local), &local->hw.conf);
- return TXRX_CONTINUE;
+ return ret;
}
-
-static void ieee80211_rx_michael_mic_report(struct net_device *dev,
- struct ieee80211_hdr *hdr,
- struct sta_info *sta,
- struct ieee80211_txrx_data *rx)
+void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
{
- int keyidx, hdrlen;
-
- hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb);
- if (rx->skb->len >= hdrlen + 4)
- keyidx = rx->skb->data[hdrlen + 3] >> 6;
- else
- keyidx = -1;
-
- /* TODO: verify that this is not triggered by fragmented
- * frames (hw does not verify MIC for them). */
- printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
- "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
- dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx);
-
- if (!sta) {
- /* Some hardware versions seem to generate incorrect
- * Michael MIC reports; ignore them to avoid triggering
- * countermeasures. */
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for unknown address " MAC_FMT "\n",
- dev->name, MAC_ARG(hdr->addr2));
- goto ignore;
- }
-
- if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame with no ISWEP flag (src "
- MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
- goto ignore;
- }
-
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
- rx->sdata->type == IEEE80211_IF_TYPE_AP) {
- keyidx = ieee80211_wep_get_keyidx(rx->skb);
- /* AP with Pairwise keys support should never receive Michael
- * MIC errors for non-zero keyidx because these are reserved
- * for group keys and only the AP is sending real multicast
- * frames in BSS. */
- if (keyidx) {
- printk(KERN_DEBUG "%s: ignored Michael MIC error for "
- "a frame with non-zero keyidx (%d) (src " MAC_FMT
- ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2));
- goto ignore;
- }
- }
-
- if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
- ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
- (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) {
- printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
- "error for a frame that cannot be encrypted "
- "(fc=0x%04x) (src " MAC_FMT ")\n",
- dev->name, rx->fc, MAC_ARG(hdr->addr2));
- goto ignore;
- }
-
- do {
- union iwreq_data wrqu;
- char *buf = kmalloc(128, GFP_ATOMIC);
- if (!buf)
- break;
-
- /* TODO: needed parameters: count, key type, TSC */
- sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
- "keyid=%d %scast addr=" MAC_FMT ")",
- keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
- MAC_ARG(hdr->addr2));
- memset(&wrqu, 0, sizeof(wrqu));
- wrqu.data.length = strlen(buf);
- wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf);
- kfree(buf);
- } while (0);
-
- /* TODO: consider verifying the MIC error report with software
- * implementation if we get too many spurious reports from the
- * hardware. */
- if (!rx->local->apdev)
- goto ignore;
- ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
- ieee80211_msg_michael_mic_failure);
- return;
-
- ignore:
- dev_kfree_skb(rx->skb);
- rx->skb = NULL;
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (local->ops->erp_ie_changed)
+ local->ops->erp_ie_changed(local_to_hw(local), changes,
+ sdata->use_protection,
+ !sdata->short_preamble);
}
-static inline ieee80211_txrx_result __ieee80211_invoke_rx_handlers(
- struct ieee80211_local *local,
- ieee80211_rx_handler *handlers,
- struct ieee80211_txrx_data *rx,
- struct sta_info *sta)
+void ieee80211_reset_erp_info(struct net_device *dev)
{
- ieee80211_rx_handler *handler;
- ieee80211_txrx_result res = TXRX_DROP;
-
- for (handler = handlers; *handler != NULL; handler++) {
- res = (*handler)(rx);
- if (res != TXRX_CONTINUE) {
- if (res == TXRX_DROP) {
- I802_DEBUG_INC(local->rx_handlers_drop);
- if (sta)
- sta->rx_dropped++;
- }
- if (res == TXRX_QUEUED)
- I802_DEBUG_INC(local->rx_handlers_queued);
- break;
- }
- }
-
- if (res == TXRX_DROP) {
- dev_kfree_skb(rx->skb);
- }
- return res;
-}
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local *local,
- ieee80211_rx_handler *handlers,
- struct ieee80211_txrx_data *rx,
- struct sta_info *sta)
-{
- if (__ieee80211_invoke_rx_handlers(local, handlers, rx, sta) ==
- TXRX_CONTINUE)
- dev_kfree_skb(rx->skb);
+ sdata->short_preamble = 0;
+ sdata->use_protection = 0;
+ ieee80211_erp_info_change_notify(dev,
+ IEEE80211_ERP_CHANGE_PROTECTION |
+ IEEE80211_ERP_CHANGE_PREAMBLE);
}
-/*
- * This is the receive path handler. It is called by a low level driver when an
- * 802.11 MPDU is received from the hardware.
- */
-void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
+struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
+ struct dev_mc_list *prev,
+ void **ptr)
{
struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_sub_if_data *sdata;
- struct sta_info *sta;
- struct ieee80211_hdr *hdr;
- struct ieee80211_txrx_data rx;
- u16 type;
- int multicast;
- int radiotap_len = 0;
-
- if (status->flag & RX_FLAG_RADIOTAP) {
- radiotap_len = ieee80211_get_radiotap_len(skb);
- skb_pull(skb, radiotap_len);
- }
-
- hdr = (struct ieee80211_hdr *) skb->data;
- memset(&rx, 0, sizeof(rx));
- rx.skb = skb;
- rx.local = local;
-
- rx.u.rx.status = status;
- rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0;
- type = rx.fc & IEEE80211_FCTL_FTYPE;
- if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
- local->dot11ReceivedFragmentCount++;
- multicast = is_multicast_ether_addr(hdr->addr1);
-
- if (skb->len >= 16)
- sta = rx.sta = sta_info_get(local, hdr->addr2);
- else
- sta = rx.sta = NULL;
-
- if (sta) {
- rx.dev = sta->dev;
- rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
- }
-
- if ((status->flag & RX_FLAG_MMIC_ERROR)) {
- ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx);
- goto end;
- }
-
- if (unlikely(local->sta_scanning))
- rx.u.rx.in_scan = 1;
-
- if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx,
- sta) != TXRX_CONTINUE)
- goto end;
- skb = rx.skb;
-
- skb_push(skb, radiotap_len);
- if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) &&
- !local->iff_promiscs && !multicast) {
- rx.u.rx.ra_match = 1;
- ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx,
- sta);
- } else {
- struct ieee80211_sub_if_data *prev = NULL;
- struct sk_buff *skb_new;
- u8 *bssid = ieee80211_get_bssid(hdr, skb->len - radiotap_len);
-
- read_lock(&local->sub_if_lock);
- list_for_each_entry(sdata, &local->sub_if_list, list) {
- rx.u.rx.ra_match = 1;
- switch (sdata->type) {
- case IEEE80211_IF_TYPE_STA:
- if (!bssid)
- continue;
- if (!ieee80211_bssid_match(bssid,
- sdata->u.sta.bssid)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0) {
- if (!sdata->promisc)
- continue;
- rx.u.rx.ra_match = 0;
- }
- break;
- case IEEE80211_IF_TYPE_IBSS:
- if (!bssid)
- continue;
- if (!ieee80211_bssid_match(bssid,
- sdata->u.sta.bssid)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!multicast &&
- compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0) {
- if (!sdata->promisc)
- continue;
- rx.u.rx.ra_match = 0;
- } else if (!sta)
- sta = rx.sta =
- ieee80211_ibss_add_sta(sdata->dev,
- skb, bssid,
- hdr->addr2);
- break;
- case IEEE80211_IF_TYPE_AP:
- if (!bssid) {
- if (compare_ether_addr(sdata->dev->dev_addr,
- hdr->addr1) != 0)
- continue;
- } else if (!ieee80211_bssid_match(bssid,
- sdata->dev->dev_addr)) {
- if (!rx.u.rx.in_scan)
- continue;
- rx.u.rx.ra_match = 0;
- }
- if (sdata->dev == local->mdev &&
- !rx.u.rx.in_scan)
- /* do not receive anything via
- * master device when not scanning */
- continue;
- break;
- case IEEE80211_IF_TYPE_WDS:
- if (bssid ||
- (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
- continue;
- if (compare_ether_addr(sdata->u.wds.remote_addr,
- hdr->addr2) != 0)
- continue;
- break;
- }
-
- if (prev) {
- skb_new = skb_copy(skb, GFP_ATOMIC);
- if (!skb_new) {
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: failed to copy "
- "multicast frame for %s",
- local->mdev->name, prev->dev->name);
- continue;
- }
- rx.skb = skb_new;
- rx.dev = prev->dev;
- rx.sdata = prev;
- ieee80211_invoke_rx_handlers(local,
- local->rx_handlers,
- &rx, sta);
- }
- prev = sdata;
- }
- if (prev) {
- rx.skb = skb;
- rx.dev = prev->dev;
- rx.sdata = prev;
- ieee80211_invoke_rx_handlers(local, local->rx_handlers,
- &rx, sta);
- } else
- dev_kfree_skb(skb);
- read_unlock(&local->sub_if_lock);
- }
-
- end:
- if (sta)
- sta_info_put(sta);
-}
-EXPORT_SYMBOL(__ieee80211_rx);
-
-static ieee80211_txrx_result
-ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
-{
- struct ieee80211_local *local = tx->local;
- struct ieee80211_hw_mode *mode = tx->u.tx.mode;
- struct sk_buff *skb = tx->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u32 load = 0, hdrtime;
-
- /* TODO: this could be part of tx_status handling, so that the number
- * of retries would be known; TX rate should in that case be stored
- * somewhere with the packet */
-
- /* Estimate total channel use caused by this frame */
-
- /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
- * 1 usec = 1/8 * (1080 / 10) = 13.5 */
-
- if (mode->mode == MODE_IEEE80211A ||
- mode->mode == MODE_ATHEROS_TURBO ||
- mode->mode == MODE_ATHEROS_TURBOG ||
- (mode->mode == MODE_IEEE80211G &&
- tx->u.tx.rate->flags & IEEE80211_RATE_ERP))
- hdrtime = CHAN_UTIL_HDR_SHORT;
- else
- hdrtime = CHAN_UTIL_HDR_LONG;
-
- load = hdrtime;
- if (!is_multicast_ether_addr(hdr->addr1))
- load += hdrtime;
-
- if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
- load += 2 * hdrtime;
- else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
- load += hdrtime;
-
- load += skb->len * tx->u.tx.rate->rate_inv;
-
- if (tx->u.tx.extra_frag) {
- int i;
- for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
- load += 2 * hdrtime;
- load += tx->u.tx.extra_frag[i]->len *
- tx->u.tx.rate->rate;
- }
- }
-
- /* Divide channel_use by 8 to avoid wrapping around the counter */
- load >>= CHAN_UTIL_SHIFT;
- local->channel_use_raw += load;
- if (tx->sta)
- tx->sta->channel_use_raw += load;
- tx->sdata->channel_use_raw += load;
-
- return TXRX_CONTINUE;
-}
-
-
-static ieee80211_txrx_result
-ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx)
-{
- struct ieee80211_local *local = rx->local;
- struct sk_buff *skb = rx->skb;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u32 load = 0, hdrtime;
- struct ieee80211_rate *rate;
- struct ieee80211_hw_mode *mode = local->hw.conf.mode;
- int i;
-
- /* Estimate total channel use caused by this frame */
-
- if (unlikely(mode->num_rates < 0))
- return TXRX_CONTINUE;
+ struct ieee80211_sub_if_data *sdata = *ptr;
+ struct dev_mc_list *mc;
- rate = &mode->rates[0];
- for (i = 0; i < mode->num_rates; i++) {
- if (mode->rates[i].val == rx->u.rx.status->rate) {
- rate = &mode->rates[i];
- break;
- }
+ if (!prev) {
+ WARN_ON(sdata);
+ sdata = NULL;
}
+ if (!prev || !prev->next) {
+ if (sdata)
+ sdata = list_entry(sdata->list.next,
+ struct ieee80211_sub_if_data, list);
+ else
+ sdata = list_entry(local->sub_if_list.next,
+ struct ieee80211_sub_if_data, list);
+ if (&sdata->list != &local->sub_if_list)
+ mc = sdata->dev->mc_list;
+ else
+ mc = NULL;
+ } else
+ mc = prev->next;
- /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
- * 1 usec = 1/8 * (1080 / 10) = 13.5 */
-
- if (mode->mode == MODE_IEEE80211A ||
- mode->mode == MODE_ATHEROS_TURBO ||
- mode->mode == MODE_ATHEROS_TURBOG ||
- (mode->mode == MODE_IEEE80211G &&
- rate->flags & IEEE80211_RATE_ERP))
- hdrtime = CHAN_UTIL_HDR_SHORT;
- else
- hdrtime = CHAN_UTIL_HDR_LONG;
-
- load = hdrtime;
- if (!is_multicast_ether_addr(hdr->addr1))
- load += hdrtime;
-
- load += skb->len * rate->rate_inv;
-
- /* Divide channel_use by 8 to avoid wrapping around the counter */
- load >>= CHAN_UTIL_SHIFT;
- local->channel_use_raw += load;
- if (rx->sta)
- rx->sta->channel_use_raw += load;
- rx->u.rx.load = load;
-
- return TXRX_CONTINUE;
-}
-
-static ieee80211_txrx_result
-ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx)
-{
- rx->sdata->channel_use_raw += rx->u.rx.load;
- return TXRX_CONTINUE;
+ *ptr = sdata;
+ return mc;
}
+EXPORT_SYMBOL(ieee80211_get_mc_list_item);
static void ieee80211_stat_refresh(unsigned long data)
{
@@ -4284,13 +815,13 @@ static void ieee80211_stat_refresh(unsigned long data)
return;
/* go through all stations */
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
list_for_each_entry(sta, &local->sta_list, list) {
sta->channel_use = (sta->channel_use_raw / local->stat_time) /
CHAN_UTIL_PER_10MS;
sta->channel_use_raw = 0;
}
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
/* go through all subinterfaces */
read_lock(&local->sub_if_lock);
@@ -4310,25 +841,6 @@ static void ieee80211_stat_refresh(unsigned long data)
add_timer(&local->stat_timer);
}
-
-/* This is a version of the rx handler that can be called from hard irq
- * context. Post the skb on the queue and schedule the tasklet */
-void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ieee80211_rx_status *status)
-{
- struct ieee80211_local *local = hw_to_local(hw);
-
- BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
-
- skb->dev = local->mdev;
- /* copy status into skb->cb for use by tasklet */
- memcpy(skb->cb, status, sizeof(*status));
- skb->pkt_type = IEEE80211_RX_MSG;
- skb_queue_tail(&local->skb_queue, skb);
- tasklet_schedule(&local->tasklet);
-}
-EXPORT_SYMBOL(ieee80211_rx_irqsafe);
-
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
struct sk_buff *skb,
struct ieee80211_tx_status *status)
@@ -4405,7 +917,6 @@ static void ieee80211_tasklet_handler(unsigned long data)
}
}
-
/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
* make a prepared TX frame (one that has been given to hw) to look like brand
* new IEEE 802.11 frame that is ready to go through TX processing again.
@@ -4468,7 +979,6 @@ no_key:
}
}
-
void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_tx_status *status)
{
@@ -4688,164 +1198,6 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
}
EXPORT_SYMBOL(ieee80211_tx_status);
-/* TODO: implement register/unregister functions for adding TX/RX handlers
- * into ordered list */
-
-/* rx_pre handlers don't have dev and sdata fields available in
- * ieee80211_txrx_data */
-static ieee80211_rx_handler ieee80211_rx_pre_handlers[] =
-{
- ieee80211_rx_h_parse_qos,
- ieee80211_rx_h_load_stats,
- NULL
-};
-
-static ieee80211_rx_handler ieee80211_rx_handlers[] =
-{
- ieee80211_rx_h_if_stats,
- ieee80211_rx_h_monitor,
- ieee80211_rx_h_passive_scan,
- ieee80211_rx_h_check,
- ieee80211_rx_h_sta_process,
- ieee80211_rx_h_ccmp_decrypt,
- ieee80211_rx_h_tkip_decrypt,
- ieee80211_rx_h_wep_weak_iv_detection,
- ieee80211_rx_h_wep_decrypt,
- ieee80211_rx_h_defragment,
- ieee80211_rx_h_ps_poll,
- ieee80211_rx_h_michael_mic_verify,
- /* this must be after decryption - so header is counted in MPDU mic
- * must be before pae and data, so QOS_DATA format frames
- * are not passed to user space by these functions
- */
- ieee80211_rx_h_remove_qos_control,
- ieee80211_rx_h_802_1x_pae,
- ieee80211_rx_h_drop_unencrypted,
- ieee80211_rx_h_data,
- ieee80211_rx_h_mgmt,
- NULL
-};
-
-static ieee80211_tx_handler ieee80211_tx_handlers[] =
-{
- ieee80211_tx_h_check_assoc,
- ieee80211_tx_h_sequence,
- ieee80211_tx_h_ps_buf,
- ieee80211_tx_h_select_key,
- ieee80211_tx_h_michael_mic_add,
- ieee80211_tx_h_fragment,
- ieee80211_tx_h_tkip_encrypt,
- ieee80211_tx_h_ccmp_encrypt,
- ieee80211_tx_h_wep_encrypt,
- ieee80211_tx_h_rate_ctrl,
- ieee80211_tx_h_misc,
- ieee80211_tx_h_load_stats,
- NULL
-};
-
-
-int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
-{
- struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- struct sta_info *sta;
-
- if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
- return 0;
-
- /* Create STA entry for the new peer */
- sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
- if (!sta)
- return -ENOMEM;
- sta_info_put(sta);
-
- /* Remove STA entry for the old peer */
- sta = sta_info_get(local, sdata->u.wds.remote_addr);
- if (sta) {
- sta_info_put(sta);
- sta_info_free(sta, 0);
- } else {
- printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
- "peer " MAC_FMT "\n",
- dev->name, MAC_ARG(sdata->u.wds.remote_addr));
- }
-
- /* Update WDS link data */
- memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
-
- return 0;
-}
-
-/* Must not be called for mdev and apdev */
-void ieee80211_if_setup(struct net_device *dev)
-{
- ether_setup(dev);
- dev->hard_start_xmit = ieee80211_subif_start_xmit;
- dev->wireless_handlers = &ieee80211_iw_handler_def;
- dev->set_multicast_list = ieee80211_set_multicast_list;
- dev->change_mtu = ieee80211_change_mtu;
- dev->get_stats = ieee80211_get_stats;
- dev->open = ieee80211_open;
- dev->stop = ieee80211_stop;
- dev->uninit = ieee80211_if_reinit;
- dev->destructor = ieee80211_if_free;
-}
-
-void ieee80211_if_mgmt_setup(struct net_device *dev)
-{
- ether_setup(dev);
- dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
- dev->change_mtu = ieee80211_change_mtu_apdev;
- dev->get_stats = ieee80211_get_stats;
- dev->open = ieee80211_mgmt_open;
- dev->stop = ieee80211_mgmt_stop;
- dev->type = ARPHRD_IEEE80211_PRISM;
- dev->hard_header_parse = header_parse_80211;
- dev->uninit = ieee80211_if_reinit;
- dev->destructor = ieee80211_if_free;
-}
-
-int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
- const char *name)
-{
- struct rate_control_ref *ref, *old;
-
- ASSERT_RTNL();
- if (local->open_count || netif_running(local->mdev) ||
- (local->apdev && netif_running(local->apdev)))
- return -EBUSY;
-
- ref = rate_control_alloc(name, local);
- if (!ref) {
- printk(KERN_WARNING "%s: Failed to select rate control "
- "algorithm\n", local->mdev->name);
- return -ENOENT;
- }
-
- old = local->rate_ctrl;
- local->rate_ctrl = ref;
- if (old) {
- rate_control_put(old);
- sta_info_flush(local, NULL);
- }
-
- printk(KERN_DEBUG "%s: Selected rate control "
- "algorithm '%s'\n", local->mdev->name,
- ref->ops->name);
-
-
- return 0;
-}
-
-static void rate_control_deinitialize(struct ieee80211_local *local)
-{
- struct rate_control_ref *ref;
-
- ref = local->rate_ctrl;
- local->rate_ctrl = NULL;
- rate_control_put(ref);
-}
-
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
const struct ieee80211_ops *ops)
{
@@ -5166,65 +1518,6 @@ void ieee80211_free_hw(struct ieee80211_hw *hw)
}
EXPORT_SYMBOL(ieee80211_free_hw);
-void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
-{
- struct ieee80211_local *local = hw_to_local(hw);
-
- if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF,
- &local->state[queue])) {
- if (test_bit(IEEE80211_LINK_STATE_PENDING,
- &local->state[queue]))
- tasklet_schedule(&local->tx_pending_tasklet);
- else
- if (!ieee80211_qdisc_installed(local->mdev)) {
- if (queue == 0)
- netif_wake_queue(local->mdev);
- } else
- __netif_schedule(local->mdev);
- }
-}
-EXPORT_SYMBOL(ieee80211_wake_queue);
-
-void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
-{
- struct ieee80211_local *local = hw_to_local(hw);
-
- if (!ieee80211_qdisc_installed(local->mdev) && queue == 0)
- netif_stop_queue(local->mdev);
- set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
-}
-EXPORT_SYMBOL(ieee80211_stop_queue);
-
-void ieee80211_start_queues(struct ieee80211_hw *hw)
-{
- struct ieee80211_local *local = hw_to_local(hw);
- int i;
-
- for (i = 0; i < local->hw.queues; i++)
- clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]);
- if (!ieee80211_qdisc_installed(local->mdev))
- netif_start_queue(local->mdev);
-}
-EXPORT_SYMBOL(ieee80211_start_queues);
-
-void ieee80211_stop_queues(struct ieee80211_hw *hw)
-{
- int i;
-
- for (i = 0; i < hw->queues; i++)
- ieee80211_stop_queue(hw, i);
-}
-EXPORT_SYMBOL(ieee80211_stop_queues);
-
-void ieee80211_wake_queues(struct ieee80211_hw *hw)
-{
- int i;
-
- for (i = 0; i < hw->queues; i++)
- ieee80211_wake_queue(hw, i);
-}
-EXPORT_SYMBOL(ieee80211_wake_queues);
-
struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata;
@@ -5252,7 +1545,6 @@ static int __init ieee80211_init(void)
return 0;
}
-
static void __exit ieee80211_exit(void)
{
ieee80211_wme_unregister();
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 6f7bae7..cc9999c 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -21,6 +21,7 @@
#include <linux/workqueue.h>
#include <linux/types.h>
#include <linux/spinlock.h>
+#include <linux/etherdevice.h>
#include <net/wireless.h>
#include "ieee80211_key.h"
#include "sta_info.h"
@@ -126,7 +127,6 @@ struct ieee80211_txrx_data {
struct ieee80211_tx_control *control;
unsigned int unicast:1;
unsigned int ps_buffered:1;
- unsigned int short_preamble:1;
unsigned int probe_last_frag:1;
struct ieee80211_hw_mode *mode;
struct ieee80211_rate *rate;
@@ -285,6 +285,11 @@ struct ieee80211_sub_if_data {
unsigned int promisc:1;
unsigned int use_protection:1; /* CTS protect ERP frames */
+ /* use short preamble with IEEE 802.11b: this flag is set when the AP
+ * or beacon generator reports that there are no present stations that
+ * cannot support short preambles */
+ unsigned int short_preamble:1;
+
struct net_device_stats stats;
int drop_unencrypted;
int eapol; /* 0 = process EAPOL frames as normal data frames,
@@ -416,10 +421,9 @@ struct ieee80211_local {
struct sk_buff_head skb_queue_unreliable;
/* Station data structures */
- spinlock_t sta_lock; /* mutex for STA data structures */
+ rwlock_t sta_lock; /* protects STA data structures */
int num_sta; /* number of stations in sta_list */
struct list_head sta_list;
- struct list_head deleted_sta_list;
struct sta_info *sta_hash[STA_HASH_SIZE];
struct timer_list sta_cleanup;
@@ -447,7 +451,6 @@ struct ieee80211_local {
int fragmentation_threshold;
int short_retry_limit; /* dot11ShortRetryLimit */
int long_retry_limit; /* dot11LongRetryLimit */
- int short_preamble; /* use short preamble with IEEE 802.11b */
struct crypto_blkcipher *wep_tx_tfm;
struct crypto_blkcipher *wep_rx_tfm;
@@ -668,9 +671,9 @@ static inline void __bss_tim_set(struct ieee80211_if_ap *bss, int aid)
static inline void bss_tim_set(struct ieee80211_local *local,
struct ieee80211_if_ap *bss, int aid)
{
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
__bss_tim_set(bss, aid);
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
}
static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, int aid)
@@ -685,9 +688,9 @@ static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, int aid)
static inline void bss_tim_clear(struct ieee80211_local *local,
struct ieee80211_if_ap *bss, int aid)
{
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
__bss_tim_clear(bss, aid);
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
}
/**
@@ -707,29 +710,31 @@ static inline int ieee80211_is_erp_rate(int phymode, int rate)
return 0;
}
+static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
+{
+ return compare_ether_addr(raddr, addr) == 0 ||
+ is_broadcast_ether_addr(raddr);
+}
+
+
/* ieee80211.c */
int ieee80211_hw_config(struct ieee80211_local *local);
int ieee80211_if_config(struct net_device *dev);
int ieee80211_if_config_beacon(struct net_device *dev);
-struct ieee80211_key_conf *
-ieee80211_key_data2conf(struct ieee80211_local *local,
- const struct ieee80211_key *data);
-struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
- int idx, size_t key_len, gfp_t flags);
-void ieee80211_key_free(struct ieee80211_key *key);
void ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
struct ieee80211_rx_status *status, u32 msg_type);
void ieee80211_prepare_rates(struct ieee80211_local *local,
struct ieee80211_hw_mode *mode);
void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx);
int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr);
-int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
-int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
void ieee80211_if_setup(struct net_device *dev);
void ieee80211_if_mgmt_setup(struct net_device *dev);
-int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
- const char *name);
struct net_device_stats *ieee80211_dev_stats(struct net_device *dev);
+struct ieee80211_rate *ieee80211_get_rate(struct ieee80211_local *local,
+ int phymode, int hwrate);
+void ieee80211_key_threshold_notify(struct net_device *dev,
+ struct ieee80211_key *key,
+ struct sta_info *sta);
/* ieee80211_ioctl.c */
extern const struct iw_handler_def ieee80211_iw_handler_def;
@@ -783,6 +788,8 @@ struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
u8 *addr);
int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
+void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
+void ieee80211_reset_erp_info(struct net_device *dev);
/* ieee80211_iface.c */
int ieee80211_if_add(struct net_device *dev, const char *name,
@@ -801,7 +808,34 @@ void ieee80211_if_del_mgmt(struct ieee80211_local *local);
void ieee80211_regdomain_init(void);
void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode);
-/* for wiphy privid */
-extern void *mac80211_wiphy_privid;
+/* rx handling */
+extern ieee80211_rx_handler ieee80211_rx_pre_handlers[];
+extern ieee80211_rx_handler ieee80211_rx_handlers[];
+
+/* tx handling */
+extern ieee80211_tx_handler ieee80211_tx_handlers[];
+void ieee80211_clear_tx_pending(struct ieee80211_local *local);
+void ieee80211_tx_pending(unsigned long data);
+int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
+int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
+int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
+int ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev);
+
+/* key handling */
+struct ieee80211_key_conf *
+ieee80211_key_data2conf(struct ieee80211_local *local,
+ const struct ieee80211_key *data);
+struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
+ int idx, size_t key_len, gfp_t flags);
+void ieee80211_key_free(struct ieee80211_key *key);
+
+/* utility functions/constants */
+extern void *mac80211_wiphy_privid; /* for wiphy privid */
+extern const unsigned char rfc1042_header[6];
+extern const unsigned char bridge_tunnel_header[6];
+u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len);
+int ieee80211_is_eapol(const struct sk_buff *skb);
+int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
+ int rate, int erp, int short_preamble);
#endif /* IEEE80211_I_H */
diff --git a/net/mac80211/ieee80211_iface.c b/net/mac80211/ieee80211_iface.c
index 8532a5c..6db6776 100644
--- a/net/mac80211/ieee80211_iface.c
+++ b/net/mac80211/ieee80211_iface.c
@@ -272,8 +272,8 @@ void ieee80211_if_reinit(struct net_device *dev)
case IEEE80211_IF_TYPE_WDS:
sta = sta_info_get(local, sdata->u.wds.remote_addr);
if (sta) {
+ sta_info_free(sta);
sta_info_put(sta);
- sta_info_free(sta, 0);
} else {
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
printk(KERN_DEBUG "%s: Someone had deleted my STA "
diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index e7904db..1fde214 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -1054,14 +1054,21 @@ static int ieee80211_ioctl_prism2_param(struct net_device *dev,
break;
case PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES:
- if (sdata->type != IEEE80211_IF_TYPE_AP)
+ if (sdata->type == IEEE80211_IF_TYPE_AP) {
+ sdata->use_protection = !!value;
+ ieee80211_erp_info_change_notify(dev, IEEE80211_ERP_CHANGE_PROTECTION);
+ } else {
ret = -ENOENT;
- else
- sdata->use_protection = value;
+ }
break;
case PRISM2_PARAM_PREAMBLE:
- local->short_preamble = value;
+ if (sdata->type != IEEE80211_IF_TYPE_AP) {
+ sdata->short_preamble = !!value;
+ ieee80211_erp_info_change_notify(dev, IEEE80211_ERP_CHANGE_PREAMBLE);
+ } else {
+ ret = -ENOENT;
+ }
break;
case PRISM2_PARAM_STAT_TIME:
@@ -1184,7 +1191,7 @@ static int ieee80211_ioctl_get_prism2_param(struct net_device *dev,
break;
case PRISM2_PARAM_PREAMBLE:
- *param = local->short_preamble;
+ *param = sdata->short_preamble;
break;
case PRISM2_PARAM_STAT_TIME:
diff --git a/net/mac80211/ieee80211_rate.c b/net/mac80211/ieee80211_rate.c
index 2118de0..a1ded74 100644
--- a/net/mac80211/ieee80211_rate.c
+++ b/net/mac80211/ieee80211_rate.c
@@ -9,6 +9,7 @@
*/
#include <linux/kernel.h>
+#include <linux/rtnetlink.h>
#include "ieee80211_rate.h"
#include "ieee80211_i.h"
@@ -137,3 +138,44 @@ void rate_control_put(struct rate_control_ref *ref)
{
kref_put(&ref->kref, rate_control_release);
}
+
+int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
+ const char *name)
+{
+ struct rate_control_ref *ref, *old;
+
+ ASSERT_RTNL();
+ if (local->open_count || netif_running(local->mdev) ||
+ (local->apdev && netif_running(local->apdev)))
+ return -EBUSY;
+
+ ref = rate_control_alloc(name, local);
+ if (!ref) {
+ printk(KERN_WARNING "%s: Failed to select rate control "
+ "algorithm\n", local->mdev->name);
+ return -ENOENT;
+ }
+
+ old = local->rate_ctrl;
+ local->rate_ctrl = ref;
+ if (old) {
+ rate_control_put(old);
+ sta_info_flush(local, NULL);
+ }
+
+ printk(KERN_DEBUG "%s: Selected rate control "
+ "algorithm '%s'\n", local->mdev->name,
+ ref->ops->name);
+
+
+ return 0;
+}
+
+void rate_control_deinitialize(struct ieee80211_local *local)
+{
+ struct rate_control_ref *ref;
+
+ ref = local->rate_ctrl;
+ local->rate_ctrl = NULL;
+ rate_control_put(ref);
+}
diff --git a/net/mac80211/ieee80211_rate.h b/net/mac80211/ieee80211_rate.h
index f021a02..cac91a9 100644
--- a/net/mac80211/ieee80211_rate.h
+++ b/net/mac80211/ieee80211_rate.h
@@ -141,4 +141,10 @@ static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
#endif
}
+
+/* functions for rate control related to a device */
+int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
+ const char *name);
+void rate_control_deinitialize(struct ieee80211_local *local);
+
#endif /* IEEE80211_RATE_H */
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 7ba352e..8c41023 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -318,6 +318,8 @@ static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
+ int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
+ u8 changes = 0;
if (use_protection != sdata->use_protection) {
if (net_ratelimit()) {
@@ -328,7 +330,24 @@ static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
MAC_ARG(ifsta->bssid));
}
sdata->use_protection = use_protection;
+ changes |= IEEE80211_ERP_CHANGE_PROTECTION;
}
+
+ if (!preamble_mode != sdata->short_preamble) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: switched to %s barker preamble"
+ " (BSSID=" MAC_FMT ")\n",
+ dev->name,
+ (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
+ "short" : "long",
+ MAC_ARG(ifsta->bssid));
+ }
+ sdata->short_preamble = !preamble_mode;
+ changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
+ }
+
+ if (changes)
+ ieee80211_erp_info_change_notify(dev, changes);
}
@@ -344,7 +363,7 @@ static void ieee80211_sta_send_associnfo(struct net_device *dev,
return;
buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
- ifsta->assocresp_ies_len), GFP_ATOMIC);
+ ifsta->assocresp_ies_len), GFP_KERNEL);
if (!buf)
return;
@@ -387,7 +406,6 @@ static void ieee80211_set_associated(struct net_device *dev,
struct ieee80211_if_sta *ifsta, int assoc)
{
union iwreq_data wrqu;
- struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (ifsta->associated == assoc)
return;
@@ -415,7 +433,7 @@ static void ieee80211_set_associated(struct net_device *dev,
ieee80211_sta_send_associnfo(dev, ifsta);
} else {
netif_carrier_off(dev);
- sdata->use_protection = 0;
+ ieee80211_reset_erp_info(dev);
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
}
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
@@ -626,7 +644,7 @@ static void ieee80211_send_assoc(struct net_device *dev,
kfree(ifsta->assocreq_ies);
ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
- ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
+ ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
if (ifsta->assocreq_ies)
memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
@@ -773,7 +791,7 @@ static void ieee80211_associated(struct net_device *dev,
"range\n",
dev->name, MAC_ARG(ifsta->bssid));
disassoc = 1;
- sta_info_free(sta, 0);
+ sta_info_free(sta);
ifsta->probereq_poll = 0;
} else {
ieee80211_send_probe_req(dev, ifsta->bssid,
@@ -1187,8 +1205,10 @@ static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
if (status_code != WLAN_STATUS_SUCCESS) {
printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
dev->name, status_code);
- if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
- ifsta->prev_bssid_set = 0;
+ /* if this was a reassociation, ensure we try a "full"
+ * association next time. This works around some broken APs
+ * which do not correctly reject reassociation requests. */
+ ifsta->prev_bssid_set = 0;
return;
}
@@ -1224,7 +1244,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
kfree(ifsta->assocresp_ies);
ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
- ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
+ ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
if (ifsta->assocresp_ies)
memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
@@ -1234,7 +1254,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
sta = sta_info_get(local, ifsta->bssid);
if (!sta) {
struct ieee80211_sta_bss *bss;
- sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
+ sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
if (!sta) {
printk(KERN_DEBUG "%s: failed to add STA entry for the"
" AP\n", dev->name);
@@ -1751,7 +1771,7 @@ static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
}
/* Reply with ProbeResp */
- skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
+ skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
if (!skb)
return;
@@ -1890,7 +1910,7 @@ static int ieee80211_sta_active_ibss(struct net_device *dev)
int active = 0;
struct sta_info *sta;
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
list_for_each_entry(sta, &local->sta_list, list) {
if (sta->dev == dev &&
time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
@@ -1899,7 +1919,7 @@ static int ieee80211_sta_active_ibss(struct net_device *dev)
break;
}
}
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
return active;
}
@@ -1909,16 +1929,24 @@ static void ieee80211_sta_expire(struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sta_info *sta, *tmp;
+ LIST_HEAD(tmp_list);
- spin_lock_bh(&local->sta_lock);
+ write_lock_bh(&local->sta_lock);
list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
if (time_after(jiffies, sta->last_rx +
IEEE80211_IBSS_INACTIVITY_LIMIT)) {
printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
"\n", dev->name, MAC_ARG(sta->addr));
- sta_info_free(sta, 1);
+ __sta_info_get(sta);
+ sta_info_remove(sta);
+ list_add(&sta->list, &tmp_list);
}
- spin_unlock_bh(&local->sta_lock);
+ write_unlock_bh(&local->sta_lock);
+
+ list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
+ sta_info_free(sta);
+ sta_info_put(sta);
+ }
}
@@ -2267,7 +2295,7 @@ static int ieee80211_sta_join_ibss(struct net_device *dev,
"for IBSS beacon\n", dev->name);
break;
}
- control.tx_rate = (local->short_preamble &&
+ control.tx_rate = (sdata->short_preamble &&
(rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
rate->val2 : rate->val;
control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
new file mode 100644
index 0000000..b67558c
--- /dev/null
+++ b/net/mac80211/key.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "debugfs_key.h"
+#include "aes_ccm.h"
+
+struct ieee80211_key_conf *
+ieee80211_key_data2conf(struct ieee80211_local *local,
+ const struct ieee80211_key *data)
+{
+ struct ieee80211_key_conf *conf;
+
+ conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC);
+ if (!conf)
+ return NULL;
+
+ conf->hw_key_idx = data->hw_key_idx;
+ conf->alg = data->alg;
+ conf->keylen = data->keylen;
+ conf->flags = 0;
+ if (data->force_sw_encrypt)
+ conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT;
+ conf->keyidx = data->keyidx;
+ if (data->default_tx_key)
+ conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY;
+ if (local->default_wep_only)
+ conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY;
+ memcpy(conf->key, data->key, data->keylen);
+
+ return conf;
+}
+
+struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
+ int idx, size_t key_len, gfp_t flags)
+{
+ struct ieee80211_key *key;
+
+ key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags);
+ if (!key)
+ return NULL;
+ kref_init(&key->kref);
+ return key;
+}
+
+static void ieee80211_key_release(struct kref *kref)
+{
+ struct ieee80211_key *key;
+
+ key = container_of(kref, struct ieee80211_key, kref);
+ if (key->alg == ALG_CCMP)
+ ieee80211_aes_key_free(key->u.ccmp.tfm);
+ ieee80211_debugfs_key_remove(key);
+ kfree(key);
+}
+
+void ieee80211_key_free(struct ieee80211_key *key)
+{
+ if (key)
+ kref_put(&key->kref, ieee80211_key_release);
+}
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
new file mode 100644
index 0000000..95a00eb
--- /dev/null
+++ b/net/mac80211/rx.c
@@ -0,0 +1,1453 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <net/iw_handler.h>
+#include <net/mac80211.h>
+#include <net/ieee80211_radiotap.h>
+
+#include "ieee80211_i.h"
+#include "ieee80211_led.h"
+#include "ieee80211_common.h"
+#include "wep.h"
+#include "wpa.h"
+#include "tkip.h"
+#include "wme.h"
+
+/* pre-rx handlers
+ *
+ * these don't have dev/sdata fields in the rx data
+ * The sta value should also not be used because it may
+ * be NULL even though a STA (in IBSS mode) will be added.
+ */
+
+static ieee80211_txrx_result
+ieee80211_rx_h_parse_qos(struct ieee80211_txrx_data *rx)
+{
+ u8 *data = rx->skb->data;
+ int tid;
+
+ /* does the frame have a qos control field? */
+ if (WLAN_FC_IS_QOS_DATA(rx->fc)) {
+ u8 *qc = data + ieee80211_get_hdrlen(rx->fc) - QOS_CONTROL_LEN;
+ /* frame has qos control */
+ tid = qc[0] & QOS_CONTROL_TID_MASK;
+ } else {
+ if (unlikely((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)) {
+ /* Separate TID for management frames */
+ tid = NUM_RX_DATA_QUEUES - 1;
+ } else {
+ /* no qos control present */
+ tid = 0; /* 802.1d - Best Effort */
+ }
+ }
+
+ I802_DEBUG_INC(rx->local->wme_rx_queue[tid]);
+ /* only a debug counter, sta might not be assigned properly yet */
+ if (rx->sta)
+ I802_DEBUG_INC(rx->sta->wme_rx_queue[tid]);
+
+ rx->u.rx.queue = tid;
+ /* Set skb->priority to 1d tag if highest order bit of TID is not set.
+ * For now, set skb->priority to 0 for other cases. */
+ rx->skb->priority = (tid > 7) ? 0 : tid;
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx)
+{
+ struct ieee80211_local *local = rx->local;
+ struct sk_buff *skb = rx->skb;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ u32 load = 0, hdrtime;
+ struct ieee80211_rate *rate;
+ struct ieee80211_hw_mode *mode = local->hw.conf.mode;
+ int i;
+
+ /* Estimate total channel use caused by this frame */
+
+ if (unlikely(mode->num_rates < 0))
+ return TXRX_CONTINUE;
+
+ rate = &mode->rates[0];
+ for (i = 0; i < mode->num_rates; i++) {
+ if (mode->rates[i].val == rx->u.rx.status->rate) {
+ rate = &mode->rates[i];
+ break;
+ }
+ }
+
+ /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
+ * 1 usec = 1/8 * (1080 / 10) = 13.5 */
+
+ if (mode->mode == MODE_IEEE80211A ||
+ mode->mode == MODE_ATHEROS_TURBO ||
+ mode->mode == MODE_ATHEROS_TURBOG ||
+ (mode->mode == MODE_IEEE80211G &&
+ rate->flags & IEEE80211_RATE_ERP))
+ hdrtime = CHAN_UTIL_HDR_SHORT;
+ else
+ hdrtime = CHAN_UTIL_HDR_LONG;
+
+ load = hdrtime;
+ if (!is_multicast_ether_addr(hdr->addr1))
+ load += hdrtime;
+
+ load += skb->len * rate->rate_inv;
+
+ /* Divide channel_use by 8 to avoid wrapping around the counter */
+ load >>= CHAN_UTIL_SHIFT;
+ local->channel_use_raw += load;
+ rx->u.rx.load = load;
+
+ return TXRX_CONTINUE;
+}
+
+ieee80211_rx_handler ieee80211_rx_pre_handlers[] =
+{
+ ieee80211_rx_h_parse_qos,
+ ieee80211_rx_h_load_stats,
+ NULL
+};
+
+/* rx handlers */
+
+static ieee80211_txrx_result
+ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx)
+{
+ if (rx->sta)
+ rx->sta->channel_use_raw += rx->u.rx.load;
+ rx->sdata->channel_use_raw += rx->u.rx.load;
+ return TXRX_CONTINUE;
+}
+
+static void
+ieee80211_rx_monitor(struct net_device *dev, struct sk_buff *skb,
+ struct ieee80211_rx_status *status)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_rate *rate;
+ struct ieee80211_rtap_hdr {
+ struct ieee80211_radiotap_header hdr;
+ u8 flags;
+ u8 rate;
+ __le16 chan_freq;
+ __le16 chan_flags;
+ u8 antsignal;
+ } __attribute__ ((packed)) *rthdr;
+
+ skb->dev = dev;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ if (status->flag & RX_FLAG_RADIOTAP)
+ goto out;
+
+ if (skb_headroom(skb) < sizeof(*rthdr)) {
+ I802_DEBUG_INC(local->rx_expand_skb_head);
+ if (pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) {
+ dev_kfree_skb(skb);
+ return;
+ }
+ }
+
+ rthdr = (struct ieee80211_rtap_hdr *) skb_push(skb, sizeof(*rthdr));
+ memset(rthdr, 0, sizeof(*rthdr));
+ rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
+ rthdr->hdr.it_present =
+ cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
+ (1 << IEEE80211_RADIOTAP_RATE) |
+ (1 << IEEE80211_RADIOTAP_CHANNEL) |
+ (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL));
+ rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ?
+ IEEE80211_RADIOTAP_F_FCS : 0;
+ rate = ieee80211_get_rate(local, status->phymode, status->rate);
+ if (rate)
+ rthdr->rate = rate->rate / 5;
+ rthdr->chan_freq = cpu_to_le16(status->freq);
+ rthdr->chan_flags =
+ status->phymode == MODE_IEEE80211A ?
+ cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ) :
+ cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ);
+ rthdr->antsignal = status->ssi;
+
+ out:
+ sdata->stats.rx_packets++;
+ sdata->stats.rx_bytes += skb->len;
+
+ skb_set_mac_header(skb, 0);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb->pkt_type = PACKET_OTHERHOST;
+ skb->protocol = htons(ETH_P_802_2);
+ memset(skb->cb, 0, sizeof(skb->cb));
+ netif_rx(skb);
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx)
+{
+ if (rx->sdata->type == IEEE80211_IF_TYPE_MNTR) {
+ ieee80211_rx_monitor(rx->dev, rx->skb, rx->u.rx.status);
+ return TXRX_QUEUED;
+ }
+
+ if (rx->u.rx.status->flag & RX_FLAG_RADIOTAP)
+ skb_pull(rx->skb, ieee80211_get_radiotap_len(rx->skb->data));
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx)
+{
+ struct ieee80211_local *local = rx->local;
+ struct sk_buff *skb = rx->skb;
+
+ if (unlikely(local->sta_scanning != 0)) {
+ ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status);
+ return TXRX_QUEUED;
+ }
+
+ if (unlikely(rx->u.rx.in_scan)) {
+ /* scanning finished during invoking of handlers */
+ I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
+ return TXRX_DROP;
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
+{
+ struct ieee80211_hdr *hdr;
+ hdr = (struct ieee80211_hdr *) rx->skb->data;
+
+ /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
+ if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
+ if (unlikely(rx->fc & IEEE80211_FCTL_RETRY &&
+ rx->sta->last_seq_ctrl[rx->u.rx.queue] ==
+ hdr->seq_ctrl)) {
+ if (rx->u.rx.ra_match) {
+ rx->local->dot11FrameDuplicateCount++;
+ rx->sta->num_duplicates++;
+ }
+ return TXRX_DROP;
+ } else
+ rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl;
+ }
+
+ if ((rx->local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) &&
+ rx->skb->len > FCS_LEN)
+ skb_trim(rx->skb, rx->skb->len - FCS_LEN);
+
+ if (unlikely(rx->skb->len < 16)) {
+ I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
+ return TXRX_DROP;
+ }
+
+ if (!rx->u.rx.ra_match)
+ rx->skb->pkt_type = PACKET_OTHERHOST;
+ else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0)
+ rx->skb->pkt_type = PACKET_HOST;
+ else if (is_multicast_ether_addr(hdr->addr1)) {
+ if (is_broadcast_ether_addr(hdr->addr1))
+ rx->skb->pkt_type = PACKET_BROADCAST;
+ else
+ rx->skb->pkt_type = PACKET_MULTICAST;
+ } else
+ rx->skb->pkt_type = PACKET_OTHERHOST;
+
+ /* Drop disallowed frame classes based on STA auth/assoc state;
+ * IEEE 802.11, Chap 5.5.
+ *
+ * 80211.o does filtering only based on association state, i.e., it
+ * drops Class 3 frames from not associated stations. hostapd sends
+ * deauth/disassoc frames when needed. In addition, hostapd is
+ * responsible for filtering on both auth and assoc states.
+ */
+ if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA ||
+ ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL &&
+ (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) &&
+ rx->sdata->type != IEEE80211_IF_TYPE_IBSS &&
+ (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) {
+ if ((!(rx->fc & IEEE80211_FCTL_FROMDS) &&
+ !(rx->fc & IEEE80211_FCTL_TODS) &&
+ (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)
+ || !rx->u.rx.ra_match) {
+ /* Drop IBSS frames and frames for other hosts
+ * silently. */
+ return TXRX_DROP;
+ }
+
+ if (!rx->local->apdev)
+ return TXRX_DROP;
+
+ ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
+ ieee80211_msg_sta_not_assoc);
+ return TXRX_QUEUED;
+ }
+
+ return TXRX_CONTINUE;
+}
+
+
+static ieee80211_txrx_result
+ieee80211_rx_h_load_key(struct ieee80211_txrx_data *rx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
+ int always_sta_key;
+
+ if (rx->sdata->type == IEEE80211_IF_TYPE_STA)
+ always_sta_key = 0;
+ else
+ always_sta_key = 1;
+
+ if (rx->sta && rx->sta->key && always_sta_key) {
+ rx->key = rx->sta->key;
+ } else {
+ if (rx->sta && rx->sta->key)
+ rx->key = rx->sta->key;
+ else
+ rx->key = rx->sdata->default_key;
+
+ if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
+ rx->fc & IEEE80211_FCTL_PROTECTED) {
+ int keyidx = ieee80211_wep_get_keyidx(rx->skb);
+
+ if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS &&
+ (!rx->sta || !rx->sta->key || keyidx > 0))
+ rx->key = rx->sdata->keys[keyidx];
+
+ if (!rx->key) {
+ if (!rx->u.rx.ra_match)
+ return TXRX_DROP;
+ printk(KERN_DEBUG "%s: RX WEP frame with "
+ "unknown keyidx %d (A1=" MAC_FMT " A2="
+ MAC_FMT " A3=" MAC_FMT ")\n",
+ rx->dev->name, keyidx,
+ MAC_ARG(hdr->addr1),
+ MAC_ARG(hdr->addr2),
+ MAC_ARG(hdr->addr3));
+ if (!rx->local->apdev)
+ return TXRX_DROP;
+ ieee80211_rx_mgmt(
+ rx->local, rx->skb, rx->u.rx.status,
+ ieee80211_msg_wep_frame_unknown_key);
+ return TXRX_QUEUED;
+ }
+ }
+ }
+
+ if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) {
+ rx->key->tx_rx_count++;
+ if (unlikely(rx->local->key_tx_rx_threshold &&
+ rx->key->tx_rx_count >
+ rx->local->key_tx_rx_threshold)) {
+ ieee80211_key_threshold_notify(rx->dev, rx->key,
+ rx->sta);
+ }
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata;
+ sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
+
+ if (sdata->bss)
+ atomic_inc(&sdata->bss->num_sta_ps);
+ sta->flags |= WLAN_STA_PS;
+ sta->pspoll = 0;
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d enters power "
+ "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+}
+
+static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct sk_buff *skb;
+ int sent = 0;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_tx_packet_data *pkt_data;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
+ if (sdata->bss)
+ atomic_dec(&sdata->bss->num_sta_ps);
+ sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM);
+ sta->pspoll = 0;
+ if (!skb_queue_empty(&sta->ps_tx_buf)) {
+ if (local->ops->set_tim)
+ local->ops->set_tim(local_to_hw(local), sta->aid, 0);
+ if (sdata->bss)
+ bss_tim_clear(local, sdata->bss, sta->aid);
+ }
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d exits power "
+ "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid);
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+ /* Send all buffered frames to the station */
+ while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
+ pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
+ sent++;
+ pkt_data->requeue = 1;
+ dev_queue_xmit(skb);
+ }
+ while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
+ pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
+ local->total_ps_buffered--;
+ sent++;
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d send PS frame "
+ "since STA not sleeping anymore\n", dev->name,
+ MAC_ARG(sta->addr), sta->aid);
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+ pkt_data->requeue = 1;
+ dev_queue_xmit(skb);
+ }
+
+ return sent;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx)
+{
+ struct sta_info *sta = rx->sta;
+ struct net_device *dev = rx->dev;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
+
+ if (!sta)
+ return TXRX_CONTINUE;
+
+ /* Update last_rx only for IBSS packets which are for the current
+ * BSSID to avoid keeping the current IBSS network alive in cases where
+ * other STAs are using different BSSID. */
+ if (rx->sdata->type == IEEE80211_IF_TYPE_IBSS) {
+ u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len);
+ if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0)
+ sta->last_rx = jiffies;
+ } else
+ if (!is_multicast_ether_addr(hdr->addr1) ||
+ rx->sdata->type == IEEE80211_IF_TYPE_STA) {
+ /* Update last_rx only for unicast frames in order to prevent
+ * the Probe Request frames (the only broadcast frames from a
+ * STA in infrastructure mode) from keeping a connection alive.
+ */
+ sta->last_rx = jiffies;
+ }
+
+ if (!rx->u.rx.ra_match)
+ return TXRX_CONTINUE;
+
+ sta->rx_fragments++;
+ sta->rx_bytes += rx->skb->len;
+ sta->last_rssi = (sta->last_rssi * 15 +
+ rx->u.rx.status->ssi) / 16;
+ sta->last_signal = (sta->last_signal * 15 +
+ rx->u.rx.status->signal) / 16;
+ sta->last_noise = (sta->last_noise * 15 +
+ rx->u.rx.status->noise) / 16;
+
+ if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) {
+ /* Change STA power saving mode only in the end of a frame
+ * exchange sequence */
+ if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM))
+ rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta);
+ else if (!(sta->flags & WLAN_STA_PS) &&
+ (rx->fc & IEEE80211_FCTL_PM))
+ ap_sta_ps_start(dev, sta);
+ }
+
+ /* Drop data::nullfunc frames silently, since they are used only to
+ * control station power saving mode. */
+ if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
+ (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) {
+ I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
+ /* Update counter and free packet here to avoid counting this
+ * as a dropped packed. */
+ sta->rx_packets++;
+ dev_kfree_skb(rx->skb);
+ return TXRX_QUEUED;
+ }
+
+ return TXRX_CONTINUE;
+} /* ieee80211_rx_h_sta_process */
+
+static ieee80211_txrx_result
+ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx)
+{
+ if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
+ (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
+ !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match)
+ return TXRX_CONTINUE;
+
+ /* Check for weak IVs, if hwaccel did not remove IV from the frame */
+ if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) ||
+ rx->key->force_sw_encrypt) {
+ u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key);
+ if (iv) {
+ rx->sta->wep_weak_iv_count++;
+ }
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
+{
+ /* If the device handles decryption totally, skip this test */
+ if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
+ return TXRX_CONTINUE;
+
+ if ((rx->key && rx->key->alg != ALG_WEP) ||
+ !(rx->fc & IEEE80211_FCTL_PROTECTED) ||
+ ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
+ ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
+ (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
+ return TXRX_CONTINUE;
+
+ if (!rx->key) {
+ printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
+ rx->dev->name);
+ return TXRX_DROP;
+ }
+
+ if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
+ rx->key->force_sw_encrypt) {
+ if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
+ printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
+ "failed\n", rx->dev->name);
+ return TXRX_DROP;
+ }
+ } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
+ ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
+ /* remove ICV */
+ skb_trim(rx->skb, rx->skb->len - 4);
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static inline struct ieee80211_fragment_entry *
+ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
+ unsigned int frag, unsigned int seq, int rx_queue,
+ struct sk_buff **skb)
+{
+ struct ieee80211_fragment_entry *entry;
+ int idx;
+
+ idx = sdata->fragment_next;
+ entry = &sdata->fragments[sdata->fragment_next++];
+ if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
+ sdata->fragment_next = 0;
+
+ if (!skb_queue_empty(&entry->skb_list)) {
+#ifdef CONFIG_MAC80211_DEBUG
+ struct ieee80211_hdr *hdr =
+ (struct ieee80211_hdr *) entry->skb_list.next->data;
+ printk(KERN_DEBUG "%s: RX reassembly removed oldest "
+ "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
+ "addr1=" MAC_FMT " addr2=" MAC_FMT "\n",
+ sdata->dev->name, idx,
+ jiffies - entry->first_frag_time, entry->seq,
+ entry->last_frag, MAC_ARG(hdr->addr1),
+ MAC_ARG(hdr->addr2));
+#endif /* CONFIG_MAC80211_DEBUG */
+ __skb_queue_purge(&entry->skb_list);
+ }
+
+ __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
+ *skb = NULL;
+ entry->first_frag_time = jiffies;
+ entry->seq = seq;
+ entry->rx_queue = rx_queue;
+ entry->last_frag = frag;
+ entry->ccmp = 0;
+ entry->extra_len = 0;
+
+ return entry;
+}
+
+static inline struct ieee80211_fragment_entry *
+ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
+ u16 fc, unsigned int frag, unsigned int seq,
+ int rx_queue, struct ieee80211_hdr *hdr)
+{
+ struct ieee80211_fragment_entry *entry;
+ int i, idx;
+
+ idx = sdata->fragment_next;
+ for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
+ struct ieee80211_hdr *f_hdr;
+ u16 f_fc;
+
+ idx--;
+ if (idx < 0)
+ idx = IEEE80211_FRAGMENT_MAX - 1;
+
+ entry = &sdata->fragments[idx];
+ if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
+ entry->rx_queue != rx_queue ||
+ entry->last_frag + 1 != frag)
+ continue;
+
+ f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data;
+ f_fc = le16_to_cpu(f_hdr->frame_control);
+
+ if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) ||
+ compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 ||
+ compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0)
+ continue;
+
+ if (entry->first_frag_time + 2 * HZ < jiffies) {
+ __skb_queue_purge(&entry->skb_list);
+ continue;
+ }
+ return entry;
+ }
+
+ return NULL;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
+{
+ struct ieee80211_hdr *hdr;
+ u16 sc;
+ unsigned int frag, seq;
+ struct ieee80211_fragment_entry *entry;
+ struct sk_buff *skb;
+
+ hdr = (struct ieee80211_hdr *) rx->skb->data;
+ sc = le16_to_cpu(hdr->seq_ctrl);
+ frag = sc & IEEE80211_SCTL_FRAG;
+
+ if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) ||
+ (rx->skb)->len < 24 ||
+ is_multicast_ether_addr(hdr->addr1))) {
+ /* not fragmented */
+ goto out;
+ }
+ I802_DEBUG_INC(rx->local->rx_handlers_fragments);
+
+ seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
+
+ if (frag == 0) {
+ /* This is the first fragment of a new frame. */
+ entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
+ rx->u.rx.queue, &(rx->skb));
+ if (rx->key && rx->key->alg == ALG_CCMP &&
+ (rx->fc & IEEE80211_FCTL_PROTECTED)) {
+ /* Store CCMP PN so that we can verify that the next
+ * fragment has a sequential PN value. */
+ entry->ccmp = 1;
+ memcpy(entry->last_pn,
+ rx->key->u.ccmp.rx_pn[rx->u.rx.queue],
+ CCMP_PN_LEN);
+ }
+ return TXRX_QUEUED;
+ }
+
+ /* This is a fragment for a frame that should already be pending in
+ * fragment cache. Add this fragment to the end of the pending entry.
+ */
+ entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq,
+ rx->u.rx.queue, hdr);
+ if (!entry) {
+ I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
+ return TXRX_DROP;
+ }
+
+ /* Verify that MPDUs within one MSDU have sequential PN values.
+ * (IEEE 802.11i, 8.3.3.4.5) */
+ if (entry->ccmp) {
+ int i;
+ u8 pn[CCMP_PN_LEN], *rpn;
+ if (!rx->key || rx->key->alg != ALG_CCMP)
+ return TXRX_DROP;
+ memcpy(pn, entry->last_pn, CCMP_PN_LEN);
+ for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
+ pn[i]++;
+ if (pn[i])
+ break;
+ }
+ rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
+ if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
+ printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential"
+ " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x "
+ "(expected %02x%02x%02x%02x%02x%02x)\n",
+ rx->dev->name, MAC_ARG(hdr->addr2),
+ rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5],
+ pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]);
+ return TXRX_DROP;
+ }
+ memcpy(entry->last_pn, pn, CCMP_PN_LEN);
+ }
+
+ skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc));
+ __skb_queue_tail(&entry->skb_list, rx->skb);
+ entry->last_frag = frag;
+ entry->extra_len += rx->skb->len;
+ if (rx->fc & IEEE80211_FCTL_MOREFRAGS) {
+ rx->skb = NULL;
+ return TXRX_QUEUED;
+ }
+
+ rx->skb = __skb_dequeue(&entry->skb_list);
+ if (skb_tailroom(rx->skb) < entry->extra_len) {
+ I802_DEBUG_INC(rx->local->rx_expand_skb_head2);
+ if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
+ GFP_ATOMIC))) {
+ I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
+ __skb_queue_purge(&entry->skb_list);
+ return TXRX_DROP;
+ }
+ }
+ while ((skb = __skb_dequeue(&entry->skb_list))) {
+ memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len);
+ dev_kfree_skb(skb);
+ }
+
+ /* Complete frame has been reassembled - process it now */
+ rx->fragmented = 1;
+
+ out:
+ if (rx->sta)
+ rx->sta->rx_packets++;
+ if (is_multicast_ether_addr(hdr->addr1))
+ rx->local->dot11MulticastReceivedFrameCount++;
+ else
+ ieee80211_led_rx(rx->local);
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx)
+{
+ struct sk_buff *skb;
+ int no_pending_pkts;
+
+ if (likely(!rx->sta ||
+ (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL ||
+ (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL ||
+ !rx->u.rx.ra_match))
+ return TXRX_CONTINUE;
+
+ skb = skb_dequeue(&rx->sta->tx_filtered);
+ if (!skb) {
+ skb = skb_dequeue(&rx->sta->ps_tx_buf);
+ if (skb)
+ rx->local->total_ps_buffered--;
+ }
+ no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
+ skb_queue_empty(&rx->sta->ps_tx_buf);
+
+ if (skb) {
+ struct ieee80211_hdr *hdr =
+ (struct ieee80211_hdr *) skb->data;
+
+ /* tell TX path to send one frame even though the STA may
+ * still remain is PS mode after this frame exchange */
+ rx->sta->pspoll = 1;
+
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS Poll (entries "
+ "after %d)\n",
+ MAC_ARG(rx->sta->addr), rx->sta->aid,
+ skb_queue_len(&rx->sta->ps_tx_buf));
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+
+ /* Use MoreData flag to indicate whether there are more
+ * buffered frames for this STA */
+ if (no_pending_pkts) {
+ hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
+ rx->sta->flags &= ~WLAN_STA_TIM;
+ } else
+ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+
+ dev_queue_xmit(skb);
+
+ if (no_pending_pkts) {
+ if (rx->local->ops->set_tim)
+ rx->local->ops->set_tim(local_to_hw(rx->local),
+ rx->sta->aid, 0);
+ if (rx->sdata->bss)
+ bss_tim_clear(rx->local, rx->sdata->bss, rx->sta->aid);
+ }
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ } else if (!rx->u.rx.sent_ps_buffered) {
+ printk(KERN_DEBUG "%s: STA " MAC_FMT " sent PS Poll even "
+ "though there is no buffered frames for it\n",
+ rx->dev->name, MAC_ARG(rx->sta->addr));
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+
+ }
+
+ /* Free PS Poll skb here instead of returning TXRX_DROP that would
+ * count as an dropped frame. */
+ dev_kfree_skb(rx->skb);
+
+ return TXRX_QUEUED;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_remove_qos_control(struct ieee80211_txrx_data *rx)
+{
+ u16 fc = rx->fc;
+ u8 *data = rx->skb->data;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) data;
+
+ if (!WLAN_FC_IS_QOS_DATA(fc))
+ return TXRX_CONTINUE;
+
+ /* remove the qos control field, update frame type and meta-data */
+ memmove(data + 2, data, ieee80211_get_hdrlen(fc) - 2);
+ hdr = (struct ieee80211_hdr *) skb_pull(rx->skb, 2);
+ /* change frame type to non QOS */
+ rx->fc = fc &= ~IEEE80211_STYPE_QOS_DATA;
+ hdr->frame_control = cpu_to_le16(fc);
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx)
+{
+ if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) &&
+ rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) {
+ /* Pass both encrypted and unencrypted EAPOL frames to user
+ * space for processing. */
+ if (!rx->local->apdev)
+ return TXRX_DROP;
+ ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
+ ieee80211_msg_normal);
+ return TXRX_QUEUED;
+ }
+
+ if (unlikely(rx->sdata->ieee802_1x &&
+ (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
+ (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
+ (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) &&
+ !ieee80211_is_eapol(rx->skb))) {
+#ifdef CONFIG_MAC80211_DEBUG
+ struct ieee80211_hdr *hdr =
+ (struct ieee80211_hdr *) rx->skb->data;
+ printk(KERN_DEBUG "%s: dropped frame from " MAC_FMT
+ " (unauthorized port)\n", rx->dev->name,
+ MAC_ARG(hdr->addr2));
+#endif /* CONFIG_MAC80211_DEBUG */
+ return TXRX_DROP;
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
+{
+ /* If the device handles decryption totally, skip this test */
+ if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)
+ return TXRX_CONTINUE;
+
+ /* Drop unencrypted frames if key is set. */
+ if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) &&
+ (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
+ (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC &&
+ (rx->key || rx->sdata->drop_unencrypted) &&
+ (rx->sdata->eapol == 0 ||
+ !ieee80211_is_eapol(rx->skb)))) {
+ printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
+ "encryption\n", rx->dev->name);
+ return TXRX_DROP;
+ }
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
+{
+ struct net_device *dev = rx->dev;
+ struct ieee80211_local *local = rx->local;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
+ u16 fc, hdrlen, ethertype;
+ u8 *payload;
+ u8 dst[ETH_ALEN];
+ u8 src[ETH_ALEN];
+ struct sk_buff *skb = rx->skb, *skb2;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ fc = rx->fc;
+ if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA))
+ return TXRX_CONTINUE;
+
+ if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
+ return TXRX_DROP;
+
+ hdrlen = ieee80211_get_hdrlen(fc);
+
+ /* convert IEEE 802.11 header + possible LLC headers into Ethernet
+ * header
+ * IEEE 802.11 address fields:
+ * ToDS FromDS Addr1 Addr2 Addr3 Addr4
+ * 0 0 DA SA BSSID n/a
+ * 0 1 DA BSSID SA n/a
+ * 1 0 BSSID SA DA n/a
+ * 1 1 RA TA DA SA
+ */
+
+ switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
+ case IEEE80211_FCTL_TODS:
+ /* BSSID SA DA */
+ memcpy(dst, hdr->addr3, ETH_ALEN);
+ memcpy(src, hdr->addr2, ETH_ALEN);
+
+ if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP &&
+ sdata->type != IEEE80211_IF_TYPE_VLAN)) {
+ printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID="
+ MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n",
+ dev->name, MAC_ARG(hdr->addr1),
+ MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3));
+ return TXRX_DROP;
+ }
+ break;
+ case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
+ /* RA TA DA SA */
+ memcpy(dst, hdr->addr3, ETH_ALEN);
+ memcpy(src, hdr->addr4, ETH_ALEN);
+
+ if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) {
+ printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA="
+ MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA="
+ MAC_FMT ")\n",
+ rx->dev->name, MAC_ARG(hdr->addr1),
+ MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3),
+ MAC_ARG(hdr->addr4));
+ return TXRX_DROP;
+ }
+ break;
+ case IEEE80211_FCTL_FROMDS:
+ /* DA BSSID SA */
+ memcpy(dst, hdr->addr1, ETH_ALEN);
+ memcpy(src, hdr->addr3, ETH_ALEN);
+
+ if (sdata->type != IEEE80211_IF_TYPE_STA) {
+ return TXRX_DROP;
+ }
+ break;
+ case 0:
+ /* DA SA BSSID */
+ memcpy(dst, hdr->addr1, ETH_ALEN);
+ memcpy(src, hdr->addr2, ETH_ALEN);
+
+ if (sdata->type != IEEE80211_IF_TYPE_IBSS) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: dropped IBSS frame (DA="
+ MAC_FMT " SA=" MAC_FMT " BSSID=" MAC_FMT
+ ")\n",
+ dev->name, MAC_ARG(hdr->addr1),
+ MAC_ARG(hdr->addr2),
+ MAC_ARG(hdr->addr3));
+ }
+ return TXRX_DROP;
+ }
+ break;
+ }
+
+ payload = skb->data + hdrlen;
+
+ if (unlikely(skb->len - hdrlen < 8)) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: RX too short data frame "
+ "payload\n", dev->name);
+ }
+ return TXRX_DROP;
+ }
+
+ ethertype = (payload[6] << 8) | payload[7];
+
+ if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
+ ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
+ compare_ether_addr(payload, bridge_tunnel_header) == 0)) {
+ /* remove RFC1042 or Bridge-Tunnel encapsulation and
+ * replace EtherType */
+ skb_pull(skb, hdrlen + 6);
+ memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
+ memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
+ } else {
+ struct ethhdr *ehdr;
+ __be16 len;
+ skb_pull(skb, hdrlen);
+ len = htons(skb->len);
+ ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
+ memcpy(ehdr->h_dest, dst, ETH_ALEN);
+ memcpy(ehdr->h_source, src, ETH_ALEN);
+ ehdr->h_proto = len;
+ }
+ skb->dev = dev;
+
+ skb2 = NULL;
+
+ sdata->stats.rx_packets++;
+ sdata->stats.rx_bytes += skb->len;
+
+ if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP
+ || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) {
+ if (is_multicast_ether_addr(skb->data)) {
+ /* send multicast frames both to higher layers in
+ * local net stack and back to the wireless media */
+ skb2 = skb_copy(skb, GFP_ATOMIC);
+ if (!skb2)
+ printk(KERN_DEBUG "%s: failed to clone "
+ "multicast frame\n", dev->name);
+ } else {
+ struct sta_info *dsta;
+ dsta = sta_info_get(local, skb->data);
+ if (dsta && !dsta->dev) {
+ printk(KERN_DEBUG "Station with null dev "
+ "structure!\n");
+ } else if (dsta && dsta->dev == dev) {
+ /* Destination station is associated to this
+ * AP, so send the frame directly to it and
+ * do not pass the frame to local net stack.
+ */
+ skb2 = skb;
+ skb = NULL;
+ }
+ if (dsta)
+ sta_info_put(dsta);
+ }
+ }
+
+ if (skb) {
+ /* deliver to local stack */
+ skb->protocol = eth_type_trans(skb, dev);
+ memset(skb->cb, 0, sizeof(skb->cb));
+ netif_rx(skb);
+ }
+
+ if (skb2) {
+ /* send to wireless media */
+ skb2->protocol = __constant_htons(ETH_P_802_3);
+ skb_set_network_header(skb2, 0);
+ skb_set_mac_header(skb2, 0);
+ dev_queue_xmit(skb2);
+ }
+
+ return TXRX_QUEUED;
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx)
+{
+ struct ieee80211_sub_if_data *sdata;
+
+ if (!rx->u.rx.ra_match)
+ return TXRX_DROP;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
+ if ((sdata->type == IEEE80211_IF_TYPE_STA ||
+ sdata->type == IEEE80211_IF_TYPE_IBSS) &&
+ !rx->local->user_space_mlme) {
+ ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status);
+ } else {
+ /* Management frames are sent to hostapd for processing */
+ if (!rx->local->apdev)
+ return TXRX_DROP;
+ ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
+ ieee80211_msg_normal);
+ }
+ return TXRX_QUEUED;
+}
+
+static inline ieee80211_txrx_result __ieee80211_invoke_rx_handlers(
+ struct ieee80211_local *local,
+ ieee80211_rx_handler *handlers,
+ struct ieee80211_txrx_data *rx,
+ struct sta_info *sta)
+{
+ ieee80211_rx_handler *handler;
+ ieee80211_txrx_result res = TXRX_DROP;
+
+ for (handler = handlers; *handler != NULL; handler++) {
+ res = (*handler)(rx);
+
+ switch (res) {
+ case TXRX_CONTINUE:
+ continue;
+ case TXRX_DROP:
+ I802_DEBUG_INC(local->rx_handlers_drop);
+ if (sta)
+ sta->rx_dropped++;
+ break;
+ case TXRX_QUEUED:
+ I802_DEBUG_INC(local->rx_handlers_queued);
+ break;
+ }
+ break;
+ }
+
+ if (res == TXRX_DROP)
+ dev_kfree_skb(rx->skb);
+ return res;
+}
+
+static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local *local,
+ ieee80211_rx_handler *handlers,
+ struct ieee80211_txrx_data *rx,
+ struct sta_info *sta)
+{
+ if (__ieee80211_invoke_rx_handlers(local, handlers, rx, sta) ==
+ TXRX_CONTINUE)
+ dev_kfree_skb(rx->skb);
+}
+
+static void ieee80211_rx_michael_mic_report(struct net_device *dev,
+ struct ieee80211_hdr *hdr,
+ struct sta_info *sta,
+ struct ieee80211_txrx_data *rx)
+{
+ int keyidx, hdrlen;
+
+ hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb);
+ if (rx->skb->len >= hdrlen + 4)
+ keyidx = rx->skb->data[hdrlen + 3] >> 6;
+ else
+ keyidx = -1;
+
+ /* TODO: verify that this is not triggered by fragmented
+ * frames (hw does not verify MIC for them). */
+ printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
+ "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
+ dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx);
+
+ if (!sta) {
+ /* Some hardware versions seem to generate incorrect
+ * Michael MIC reports; ignore them to avoid triggering
+ * countermeasures. */
+ printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
+ "error for unknown address " MAC_FMT "\n",
+ dev->name, MAC_ARG(hdr->addr2));
+ goto ignore;
+ }
+
+ if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
+ printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
+ "error for a frame with no ISWEP flag (src "
+ MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
+ goto ignore;
+ }
+
+ if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
+ rx->sdata->type == IEEE80211_IF_TYPE_AP) {
+ keyidx = ieee80211_wep_get_keyidx(rx->skb);
+ /* AP with Pairwise keys support should never receive Michael
+ * MIC errors for non-zero keyidx because these are reserved
+ * for group keys and only the AP is sending real multicast
+ * frames in BSS. */
+ if (keyidx) {
+ printk(KERN_DEBUG "%s: ignored Michael MIC error for "
+ "a frame with non-zero keyidx (%d) (src " MAC_FMT
+ ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2));
+ goto ignore;
+ }
+ }
+
+ if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
+ ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
+ (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) {
+ printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
+ "error for a frame that cannot be encrypted "
+ "(fc=0x%04x) (src " MAC_FMT ")\n",
+ dev->name, rx->fc, MAC_ARG(hdr->addr2));
+ goto ignore;
+ }
+
+ do {
+ union iwreq_data wrqu;
+ char *buf = kmalloc(128, GFP_ATOMIC);
+ if (!buf)
+ break;
+
+ /* TODO: needed parameters: count, key type, TSC */
+ sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
+ "keyid=%d %scast addr=" MAC_FMT ")",
+ keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni",
+ MAC_ARG(hdr->addr2));
+ memset(&wrqu, 0, sizeof(wrqu));
+ wrqu.data.length = strlen(buf);
+ wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf);
+ kfree(buf);
+ } while (0);
+
+ /* TODO: consider verifying the MIC error report with software
+ * implementation if we get too many spurious reports from the
+ * hardware. */
+ if (!rx->local->apdev)
+ goto ignore;
+ ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status,
+ ieee80211_msg_michael_mic_failure);
+ return;
+
+ ignore:
+ dev_kfree_skb(rx->skb);
+ rx->skb = NULL;
+}
+
+ieee80211_rx_handler ieee80211_rx_handlers[] =
+{
+ ieee80211_rx_h_if_stats,
+ ieee80211_rx_h_monitor,
+ ieee80211_rx_h_passive_scan,
+ ieee80211_rx_h_check,
+ ieee80211_rx_h_load_key,
+ ieee80211_rx_h_sta_process,
+ ieee80211_rx_h_ccmp_decrypt,
+ ieee80211_rx_h_tkip_decrypt,
+ ieee80211_rx_h_wep_weak_iv_detection,
+ ieee80211_rx_h_wep_decrypt,
+ ieee80211_rx_h_defragment,
+ ieee80211_rx_h_ps_poll,
+ ieee80211_rx_h_michael_mic_verify,
+ /* this must be after decryption - so header is counted in MPDU mic
+ * must be before pae and data, so QOS_DATA format frames
+ * are not passed to user space by these functions
+ */
+ ieee80211_rx_h_remove_qos_control,
+ ieee80211_rx_h_802_1x_pae,
+ ieee80211_rx_h_drop_unencrypted,
+ ieee80211_rx_h_data,
+ ieee80211_rx_h_mgmt,
+ NULL
+};
+
+/* main receive path */
+
+static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
+ u8 *bssid, struct ieee80211_txrx_data *rx,
+ struct ieee80211_hdr *hdr)
+{
+ int multicast = is_multicast_ether_addr(hdr->addr1);
+
+ switch (sdata->type) {
+ case IEEE80211_IF_TYPE_STA:
+ if (!bssid)
+ return 0;
+ if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
+ if (!rx->u.rx.in_scan)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ } else if (!multicast &&
+ compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1) != 0) {
+ if (!sdata->promisc)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ }
+ break;
+ case IEEE80211_IF_TYPE_IBSS:
+ if (!bssid)
+ return 0;
+ if (!ieee80211_bssid_match(bssid, sdata->u.sta.bssid)) {
+ if (!rx->u.rx.in_scan)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ } else if (!multicast &&
+ compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1) != 0) {
+ if (!sdata->promisc)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ } else if (!rx->sta)
+ rx->sta = ieee80211_ibss_add_sta(sdata->dev, rx->skb,
+ bssid, hdr->addr2);
+ break;
+ case IEEE80211_IF_TYPE_AP:
+ if (!bssid) {
+ if (compare_ether_addr(sdata->dev->dev_addr,
+ hdr->addr1))
+ return 0;
+ } else if (!ieee80211_bssid_match(bssid,
+ sdata->dev->dev_addr)) {
+ if (!rx->u.rx.in_scan)
+ return 0;
+ rx->u.rx.ra_match = 0;
+ }
+ if (sdata->dev == sdata->local->mdev && !rx->u.rx.in_scan)
+ /* do not receive anything via
+ * master device when not scanning */
+ return 0;
+ break;
+ case IEEE80211_IF_TYPE_WDS:
+ if (bssid ||
+ (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
+ return 0;
+ if (compare_ether_addr(sdata->u.wds.remote_addr, hdr->addr2))
+ return 0;
+ break;
+ }
+
+ return 1;
+}
+
+/*
+ * This is the receive path handler. It is called by a low level driver when an
+ * 802.11 MPDU is received from the hardware.
+ */
+void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
+ struct ieee80211_rx_status *status)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_sub_if_data *sdata;
+ struct sta_info *sta;
+ struct ieee80211_hdr *hdr;
+ struct ieee80211_txrx_data rx;
+ u16 type;
+ int radiotap_len = 0, prepres;
+ struct ieee80211_sub_if_data *prev = NULL;
+ struct sk_buff *skb_new;
+ u8 *bssid;
+
+ if (status->flag & RX_FLAG_RADIOTAP) {
+ radiotap_len = ieee80211_get_radiotap_len(skb->data);
+ skb_pull(skb, radiotap_len);
+ }
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+ memset(&rx, 0, sizeof(rx));
+ rx.skb = skb;
+ rx.local = local;
+
+ rx.u.rx.status = status;
+ rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0;
+ type = rx.fc & IEEE80211_FCTL_FTYPE;
+ if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
+ local->dot11ReceivedFragmentCount++;
+
+ if (skb->len >= 16) {
+ sta = rx.sta = sta_info_get(local, hdr->addr2);
+ if (sta) {
+ rx.dev = rx.sta->dev;
+ rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev);
+ }
+ } else
+ sta = rx.sta = NULL;
+
+ if ((status->flag & RX_FLAG_MMIC_ERROR)) {
+ ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx);
+ goto end;
+ }
+
+ if (unlikely(local->sta_scanning))
+ rx.u.rx.in_scan = 1;
+
+ if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx,
+ sta) != TXRX_CONTINUE)
+ goto end;
+ skb = rx.skb;
+
+ skb_push(skb, radiotap_len);
+ if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) &&
+ !local->iff_promiscs && !is_multicast_ether_addr(hdr->addr1)) {
+ rx.u.rx.ra_match = 1;
+ ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx,
+ rx.sta);
+ sta_info_put(sta);
+ return;
+ }
+
+ bssid = ieee80211_get_bssid(hdr, skb->len - radiotap_len);
+
+ read_lock(&local->sub_if_lock);
+ list_for_each_entry(sdata, &local->sub_if_list, list) {
+ rx.u.rx.ra_match = 1;
+
+ prepres = prepare_for_handlers(sdata, bssid, &rx, hdr);
+ /* prepare_for_handlers can change sta */
+ sta = rx.sta;
+
+ if (!prepres)
+ continue;
+
+ /*
+ * frame is destined for this interface, but if it's not
+ * also for the previous one we handle that after the
+ * loop to avoid copying the SKB once too much
+ */
+
+ if (!prev) {
+ prev = sdata;
+ continue;
+ }
+
+ /*
+ * frame was destined for the previous interface
+ * so invoke RX handlers for it
+ */
+
+ skb_new = skb_copy(skb, GFP_ATOMIC);
+ if (!skb_new) {
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: failed to copy "
+ "multicast frame for %s",
+ local->mdev->name, prev->dev->name);
+ continue;
+ }
+ rx.skb = skb_new;
+ rx.dev = prev->dev;
+ rx.sdata = prev;
+ ieee80211_invoke_rx_handlers(local, local->rx_handlers,
+ &rx, sta);
+ prev = sdata;
+ }
+ if (prev) {
+ rx.skb = skb;
+ rx.dev = prev->dev;
+ rx.sdata = prev;
+ ieee80211_invoke_rx_handlers(local, local->rx_handlers,
+ &rx, sta);
+ } else
+ dev_kfree_skb(skb);
+ read_unlock(&local->sub_if_lock);
+
+ end:
+ if (sta)
+ sta_info_put(sta);
+}
+EXPORT_SYMBOL(__ieee80211_rx);
+
+/* This is a version of the rx handler that can be called from hard irq
+ * context. Post the skb on the queue and schedule the tasklet */
+void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb,
+ struct ieee80211_rx_status *status)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
+
+ skb->dev = local->mdev;
+ /* copy status into skb->cb for use by tasklet */
+ memcpy(skb->cb, status, sizeof(*status));
+ skb->pkt_type = IEEE80211_RX_MSG;
+ skb_queue_tail(&local->skb_queue, skb);
+ tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_rx_irqsafe);
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index ab7b1f0..34245b8 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -32,38 +32,34 @@ static void sta_info_hash_add(struct ieee80211_local *local,
/* Caller must hold local->sta_lock */
-static void sta_info_hash_del(struct ieee80211_local *local,
- struct sta_info *sta)
+static int sta_info_hash_del(struct ieee80211_local *local,
+ struct sta_info *sta)
{
struct sta_info *s;
s = local->sta_hash[STA_HASH(sta->addr)];
if (!s)
- return;
- if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
+ return -ENOENT;
+ if (s == sta) {
local->sta_hash[STA_HASH(sta->addr)] = s->hnext;
- return;
+ return 0;
}
- while (s->hnext && memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
+ while (s->hnext && s->hnext != sta)
s = s->hnext;
- if (s->hnext)
- s->hnext = s->hnext->hnext;
- else
- printk(KERN_ERR "%s: could not remove STA " MAC_FMT " from "
- "hash table\n", local->mdev->name, MAC_ARG(sta->addr));
-}
+ if (s->hnext) {
+ s->hnext = sta->hnext;
+ return 0;
+ }
-static inline void __sta_info_get(struct sta_info *sta)
-{
- kref_get(&sta->kref);
+ return -ENOENT;
}
struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr)
{
struct sta_info *sta;
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
sta = local->sta_hash[STA_HASH(addr)];
while (sta) {
if (memcmp(sta->addr, addr, ETH_ALEN) == 0) {
@@ -72,7 +68,7 @@ struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr)
}
sta = sta->hnext;
}
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
return sta;
}
@@ -85,7 +81,7 @@ int sta_info_min_txrate_get(struct ieee80211_local *local)
int min_txrate = 9999999;
int i;
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
mode = local->oper_hw_mode;
for (i = 0; i < STA_HASH_SIZE; i++) {
sta = local->sta_hash[i];
@@ -95,7 +91,7 @@ int sta_info_min_txrate_get(struct ieee80211_local *local)
sta = sta->hnext;
}
}
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
if (min_txrate == 9999999)
min_txrate = 0;
@@ -150,7 +146,6 @@ struct sta_info * sta_info_add(struct ieee80211_local *local,
sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, gfp);
if (!sta->rate_ctrl_priv) {
rate_control_put(sta->rate_ctrl);
- kref_put(&sta->kref, sta_info_release);
kfree(sta);
return NULL;
}
@@ -162,14 +157,14 @@ struct sta_info * sta_info_add(struct ieee80211_local *local,
skb_queue_head_init(&sta->tx_filtered);
__sta_info_get(sta); /* sta used by caller, decremented by
* sta_info_put() */
- spin_lock_bh(&local->sta_lock);
+ write_lock_bh(&local->sta_lock);
list_add(&sta->list, &local->sta_list);
local->num_sta++;
sta_info_hash_add(local, sta);
- spin_unlock_bh(&local->sta_lock);
if (local->ops->sta_table_notification)
local->ops->sta_table_notification(local_to_hw(local),
local->num_sta);
+ write_unlock_bh(&local->sta_lock);
sta->key_idx_compression = HW_KEY_IDX_INVALID;
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
@@ -178,47 +173,25 @@ struct sta_info * sta_info_add(struct ieee80211_local *local,
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
#ifdef CONFIG_MAC80211_DEBUGFS
- if (!in_interrupt()) {
- sta->debugfs_registered = 1;
- ieee80211_sta_debugfs_add(sta);
- rate_control_add_sta_debugfs(sta);
- } else {
- /* debugfs entry adding might sleep, so schedule process
- * context task for adding entry for STAs that do not yet
- * have one. */
- queue_work(local->hw.workqueue, &local->sta_debugfs_add);
- }
+ /* debugfs entry adding might sleep, so schedule process
+ * context task for adding entry for STAs that do not yet
+ * have one. */
+ queue_work(local->hw.workqueue, &local->sta_debugfs_add);
#endif
return sta;
}
-static void finish_sta_info_free(struct ieee80211_local *local,
- struct sta_info *sta)
-{
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
- printk(KERN_DEBUG "%s: Removed STA " MAC_FMT "\n",
- local->mdev->name, MAC_ARG(sta->addr));
-#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
-
- if (sta->key) {
- ieee80211_debugfs_key_remove(sta->key);
- ieee80211_key_free(sta->key);
- sta->key = NULL;
- }
-
- rate_control_remove_sta_debugfs(sta);
- ieee80211_sta_debugfs_remove(sta);
-
- sta_info_put(sta);
-}
-
-static void sta_info_remove(struct sta_info *sta)
+/* Caller must hold local->sta_lock */
+void sta_info_remove(struct sta_info *sta)
{
struct ieee80211_local *local = sta->local;
struct ieee80211_sub_if_data *sdata;
- sta_info_hash_del(local, sta);
+ /* don't do anything if we've been removed already */
+ if (sta_info_hash_del(local, sta))
+ return;
+
list_del(&sta->list);
sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev);
if (sta->flags & WLAN_STA_PS) {
@@ -228,30 +201,29 @@ static void sta_info_remove(struct sta_info *sta)
}
local->num_sta--;
sta_info_remove_aid_ptr(sta);
+
+ if (local->ops->sta_table_notification)
+ local->ops->sta_table_notification(local_to_hw(local),
+ local->num_sta);
}
-void sta_info_free(struct sta_info *sta, int locked)
+void sta_info_free(struct sta_info *sta)
{
struct sk_buff *skb;
struct ieee80211_local *local = sta->local;
- if (!locked) {
- spin_lock_bh(&local->sta_lock);
- sta_info_remove(sta);
- spin_unlock_bh(&local->sta_lock);
- } else {
- sta_info_remove(sta);
- }
- if (local->ops->sta_table_notification)
- local->ops->sta_table_notification(local_to_hw(local),
- local->num_sta);
+ might_sleep();
+
+ write_lock_bh(&local->sta_lock);
+ sta_info_remove(sta);
+ write_unlock_bh(&local->sta_lock);
while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) {
local->total_ps_buffered--;
- dev_kfree_skb_any(skb);
+ dev_kfree_skb(skb);
}
while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) {
- dev_kfree_skb_any(skb);
+ dev_kfree_skb(skb);
}
if (sta->key) {
@@ -276,13 +248,21 @@ void sta_info_free(struct sta_info *sta, int locked)
sta->key_idx_compression = HW_KEY_IDX_INVALID;
}
-#ifdef CONFIG_MAC80211_DEBUGFS
- if (in_atomic()) {
- list_add(&sta->list, &local->deleted_sta_list);
- queue_work(local->hw.workqueue, &local->sta_debugfs_add);
- } else
-#endif
- finish_sta_info_free(local, sta);
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ printk(KERN_DEBUG "%s: Removed STA " MAC_FMT "\n",
+ local->mdev->name, MAC_ARG(sta->addr));
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+
+ if (sta->key) {
+ ieee80211_debugfs_key_remove(sta->key);
+ ieee80211_key_free(sta->key);
+ sta->key = NULL;
+ }
+
+ rate_control_remove_sta_debugfs(sta);
+ ieee80211_sta_debugfs_remove(sta);
+
+ sta_info_put(sta);
}
@@ -343,13 +323,13 @@ static void sta_info_cleanup(unsigned long data)
struct ieee80211_local *local = (struct ieee80211_local *) data;
struct sta_info *sta;
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
list_for_each_entry(sta, &local->sta_list, list) {
__sta_info_get(sta);
sta_info_cleanup_expire_buffered(local, sta);
sta_info_put(sta);
}
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
local->sta_cleanup.expires = jiffies + STA_INFO_CLEANUP_INTERVAL;
add_timer(&local->sta_cleanup);
@@ -363,35 +343,20 @@ static void sta_info_debugfs_add_task(struct work_struct *work)
struct sta_info *sta, *tmp;
while (1) {
- spin_lock_bh(&local->sta_lock);
- if (!list_empty(&local->deleted_sta_list)) {
- sta = list_entry(local->deleted_sta_list.next,
- struct sta_info, list);
- list_del(local->deleted_sta_list.next);
- } else
- sta = NULL;
- spin_unlock_bh(&local->sta_lock);
- if (!sta)
- break;
- finish_sta_info_free(local, sta);
- }
-
- while (1) {
sta = NULL;
- spin_lock_bh(&local->sta_lock);
+ read_lock_bh(&local->sta_lock);
list_for_each_entry(tmp, &local->sta_list, list) {
- if (!tmp->debugfs_registered) {
+ if (!tmp->debugfs.dir) {
sta = tmp;
__sta_info_get(sta);
break;
}
}
- spin_unlock_bh(&local->sta_lock);
+ read_unlock_bh(&local->sta_lock);
if (!sta)
break;
- sta->debugfs_registered = 1;
ieee80211_sta_debugfs_add(sta);
rate_control_add_sta_debugfs(sta);
sta_info_put(sta);
@@ -401,9 +366,8 @@ static void sta_info_debugfs_add_task(struct work_struct *work)
void sta_info_init(struct ieee80211_local *local)
{
- spin_lock_init(&local->sta_lock);
+ rwlock_init(&local->sta_lock);
INIT_LIST_HEAD(&local->sta_list);
- INIT_LIST_HEAD(&local->deleted_sta_list);
init_timer(&local->sta_cleanup);
local->sta_cleanup.expires = jiffies + STA_INFO_CLEANUP_INTERVAL;
@@ -423,17 +387,8 @@ int sta_info_start(struct ieee80211_local *local)
void sta_info_stop(struct ieee80211_local *local)
{
- struct sta_info *sta, *tmp;
-
del_timer(&local->sta_cleanup);
-
- list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
- /* sta_info_free must be called with 0 as the last
- * parameter to ensure all debugfs sta entries are
- * unregistered. We don't need locking at this
- * point. */
- sta_info_free(sta, 0);
- }
+ sta_info_flush(local, NULL);
}
void sta_info_remove_aid_ptr(struct sta_info *sta)
@@ -461,10 +416,19 @@ void sta_info_remove_aid_ptr(struct sta_info *sta)
void sta_info_flush(struct ieee80211_local *local, struct net_device *dev)
{
struct sta_info *sta, *tmp;
+ LIST_HEAD(tmp_list);
- spin_lock_bh(&local->sta_lock);
+ write_lock_bh(&local->sta_lock);
list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
- if (!dev || dev == sta->dev)
- sta_info_free(sta, 1);
- spin_unlock_bh(&local->sta_lock);
+ if (!dev || dev == sta->dev) {
+ __sta_info_get(sta);
+ sta_info_remove(sta);
+ list_add_tail(&sta->list, &tmp_list);
+ }
+ write_unlock_bh(&local->sta_lock);
+
+ list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
+ sta_info_free(sta);
+ sta_info_put(sta);
+ }
}
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index b5591d2..b5ef723 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -98,9 +98,6 @@ struct sta_info {
* filtering; used only if sta->key is not
* set */
-#ifdef CONFIG_MAC80211_DEBUGFS
- int debugfs_registered;
-#endif
int assoc_ap; /* whether this is an AP that we are
* associated with as a client */
@@ -149,12 +146,18 @@ struct sta_info {
*/
#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
+static inline void __sta_info_get(struct sta_info *sta)
+{
+ kref_get(&sta->kref);
+}
+
struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr);
int sta_info_min_txrate_get(struct ieee80211_local *local);
void sta_info_put(struct sta_info *sta);
struct sta_info * sta_info_add(struct ieee80211_local *local,
struct net_device *dev, u8 *addr, gfp_t gfp);
-void sta_info_free(struct sta_info *sta, int locked);
+void sta_info_remove(struct sta_info *sta);
+void sta_info_free(struct sta_info *sta);
void sta_info_init(struct ieee80211_local *local);
int sta_info_start(struct ieee80211_local *local);
void sta_info_stop(struct ieee80211_local *local);
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
new file mode 100644
index 0000000..4571668
--- /dev/null
+++ b/net/mac80211/tx.c
@@ -0,0 +1,1883 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *
+ * Transmit and frame generation functions.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/bitmap.h>
+#include <net/ieee80211_radiotap.h>
+#include <net/cfg80211.h>
+#include <net/mac80211.h>
+#include <asm/unaligned.h>
+
+#include "ieee80211_i.h"
+#include "ieee80211_led.h"
+#include "wep.h"
+#include "wpa.h"
+#include "wme.h"
+#include "ieee80211_rate.h"
+
+#define IEEE80211_TX_OK 0
+#define IEEE80211_TX_AGAIN 1
+#define IEEE80211_TX_FRAG_AGAIN 2
+
+/* misc utils */
+
+static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_hdr *hdr)
+{
+ /* Set the sequence number for this frame. */
+ hdr->seq_ctrl = cpu_to_le16(sdata->sequence);
+
+ /* Increase the sequence number. */
+ sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ;
+}
+
+#ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP
+static void ieee80211_dump_frame(const char *ifname, const char *title,
+ const struct sk_buff *skb)
+{
+ const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ u16 fc;
+ int hdrlen;
+
+ printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len);
+ if (skb->len < 4) {
+ printk("\n");
+ return;
+ }
+
+ fc = le16_to_cpu(hdr->frame_control);
+ hdrlen = ieee80211_get_hdrlen(fc);
+ if (hdrlen > skb->len)
+ hdrlen = skb->len;
+ if (hdrlen >= 4)
+ printk(" FC=0x%04x DUR=0x%04x",
+ fc, le16_to_cpu(hdr->duration_id));
+ if (hdrlen >= 10)
+ printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1));
+ if (hdrlen >= 16)
+ printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2));
+ if (hdrlen >= 24)
+ printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3));
+ if (hdrlen >= 30)
+ printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4));
+ printk("\n");
+}
+#else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
+static inline void ieee80211_dump_frame(const char *ifname, const char *title,
+ struct sk_buff *skb)
+{
+}
+#endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
+
+static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr,
+ int next_frag_len)
+{
+ int rate, mrate, erp, dur, i;
+ struct ieee80211_rate *txrate = tx->u.tx.rate;
+ struct ieee80211_local *local = tx->local;
+ struct ieee80211_hw_mode *mode = tx->u.tx.mode;
+
+ erp = txrate->flags & IEEE80211_RATE_ERP;
+
+ /*
+ * data and mgmt (except PS Poll):
+ * - during CFP: 32768
+ * - during contention period:
+ * if addr1 is group address: 0
+ * if more fragments = 0 and addr1 is individual address: time to
+ * transmit one ACK plus SIFS
+ * if more fragments = 1 and addr1 is individual address: time to
+ * transmit next fragment plus 2 x ACK plus 3 x SIFS
+ *
+ * IEEE 802.11, 9.6:
+ * - control response frame (CTS or ACK) shall be transmitted using the
+ * same rate as the immediately previous frame in the frame exchange
+ * sequence, if this rate belongs to the PHY mandatory rates, or else
+ * at the highest possible rate belonging to the PHY rates in the
+ * BSSBasicRateSet
+ */
+
+ if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) {
+ /* TODO: These control frames are not currently sent by
+ * 80211.o, but should they be implemented, this function
+ * needs to be updated to support duration field calculation.
+ *
+ * RTS: time needed to transmit pending data/mgmt frame plus
+ * one CTS frame plus one ACK frame plus 3 x SIFS
+ * CTS: duration of immediately previous RTS minus time
+ * required to transmit CTS and its SIFS
+ * ACK: 0 if immediately previous directed data/mgmt had
+ * more=0, with more=1 duration in ACK frame is duration
+ * from previous frame minus time needed to transmit ACK
+ * and its SIFS
+ * PS Poll: BIT(15) | BIT(14) | aid
+ */
+ return 0;
+ }
+
+ /* data/mgmt */
+ if (0 /* FIX: data/mgmt during CFP */)
+ return 32768;
+
+ if (group_addr) /* Group address as the destination - no ACK */
+ return 0;
+
+ /* Individual destination address:
+ * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
+ * CTS and ACK frames shall be transmitted using the highest rate in
+ * basic rate set that is less than or equal to the rate of the
+ * immediately previous frame and that is using the same modulation
+ * (CCK or OFDM). If no basic rate set matches with these requirements,
+ * the highest mandatory rate of the PHY that is less than or equal to
+ * the rate of the previous frame is used.
+ * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
+ */
+ rate = -1;
+ mrate = 10; /* use 1 Mbps if everything fails */
+ for (i = 0; i < mode->num_rates; i++) {
+ struct ieee80211_rate *r = &mode->rates[i];
+ if (r->rate > txrate->rate)
+ break;
+
+ if (IEEE80211_RATE_MODULATION(txrate->flags) !=
+ IEEE80211_RATE_MODULATION(r->flags))
+ continue;
+
+ if (r->flags & IEEE80211_RATE_BASIC)
+ rate = r->rate;
+ else if (r->flags & IEEE80211_RATE_MANDATORY)
+ mrate = r->rate;
+ }
+ if (rate == -1) {
+ /* No matching basic rate found; use highest suitable mandatory
+ * PHY rate */
+ rate = mrate;
+ }
+
+ /* Time needed to transmit ACK
+ * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
+ * to closest integer */
+
+ dur = ieee80211_frame_duration(local, 10, rate, erp,
+ tx->sdata->short_preamble);
+
+ if (next_frag_len) {
+ /* Frame is fragmented: duration increases with time needed to
+ * transmit next fragment plus ACK and 2 x SIFS. */
+ dur *= 2; /* ACK + SIFS */
+ /* next fragment */
+ dur += ieee80211_frame_duration(local, next_frag_len,
+ txrate->rate, erp,
+ tx->sdata->short_preamble);
+ }
+
+ return dur;
+}
+
+static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local,
+ int queue)
+{
+ return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
+}
+
+static inline int __ieee80211_queue_pending(const struct ieee80211_local *local,
+ int queue)
+{
+ return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]);
+}
+
+static int inline is_ieee80211_device(struct net_device *dev,
+ struct net_device *master)
+{
+ return (wdev_priv(dev->ieee80211_ptr) ==
+ wdev_priv(master->ieee80211_ptr));
+}
+
+/* tx handlers */
+
+static ieee80211_txrx_result
+ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx)
+{
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ struct sk_buff *skb = tx->skb;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+ u32 sta_flags;
+
+ if (unlikely(tx->local->sta_scanning != 0) &&
+ ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
+ (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ))
+ return TXRX_DROP;
+
+ if (tx->u.tx.ps_buffered)
+ return TXRX_CONTINUE;
+
+ sta_flags = tx->sta ? tx->sta->flags : 0;
+
+ if (likely(tx->u.tx.unicast)) {
+ if (unlikely(!(sta_flags & WLAN_STA_ASSOC) &&
+ tx->sdata->type != IEEE80211_IF_TYPE_IBSS &&
+ (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ printk(KERN_DEBUG "%s: dropped data frame to not "
+ "associated station " MAC_FMT "\n",
+ tx->dev->name, MAC_ARG(hdr->addr1));
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+ I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
+ return TXRX_DROP;
+ }
+ } else {
+ if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA &&
+ tx->local->num_sta == 0 &&
+ !tx->local->allow_broadcast_always &&
+ tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) {
+ /*
+ * No associated STAs - no need to send multicast
+ * frames.
+ */
+ return TXRX_DROP;
+ }
+ return TXRX_CONTINUE;
+ }
+
+ if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x &&
+ !(sta_flags & WLAN_STA_AUTHORIZED))) {
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT
+ " (unauthorized port)\n", tx->dev->name,
+ MAC_ARG(hdr->addr1));
+#endif
+ I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port);
+ return TXRX_DROP;
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+
+ if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24)
+ ieee80211_include_sequence(tx->sdata, hdr);
+
+ return TXRX_CONTINUE;
+}
+
+/* This function is called whenever the AP is about to exceed the maximum limit
+ * of buffered frames for power saving STAs. This situation should not really
+ * happen often during normal operation, so dropping the oldest buffered packet
+ * from each queue should be OK to make some room for new frames. */
+static void purge_old_ps_buffers(struct ieee80211_local *local)
+{
+ int total = 0, purged = 0;
+ struct sk_buff *skb;
+ struct ieee80211_sub_if_data *sdata;
+ struct sta_info *sta;
+
+ read_lock(&local->sub_if_lock);
+ list_for_each_entry(sdata, &local->sub_if_list, list) {
+ struct ieee80211_if_ap *ap;
+ if (sdata->dev == local->mdev ||
+ sdata->type != IEEE80211_IF_TYPE_AP)
+ continue;
+ ap = &sdata->u.ap;
+ skb = skb_dequeue(&ap->ps_bc_buf);
+ if (skb) {
+ purged++;
+ dev_kfree_skb(skb);
+ }
+ total += skb_queue_len(&ap->ps_bc_buf);
+ }
+ read_unlock(&local->sub_if_lock);
+
+ read_lock_bh(&local->sta_lock);
+ list_for_each_entry(sta, &local->sta_list, list) {
+ skb = skb_dequeue(&sta->ps_tx_buf);
+ if (skb) {
+ purged++;
+ dev_kfree_skb(skb);
+ }
+ total += skb_queue_len(&sta->ps_tx_buf);
+ }
+ read_unlock_bh(&local->sta_lock);
+
+ local->total_ps_buffered = total;
+ printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n",
+ local->mdev->name, purged);
+}
+
+static inline ieee80211_txrx_result
+ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx)
+{
+ /* broadcast/multicast frame */
+ /* If any of the associated stations is in power save mode,
+ * the frame is buffered to be sent after DTIM beacon frame */
+ if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) &&
+ tx->sdata->type != IEEE80211_IF_TYPE_WDS &&
+ tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) &&
+ !(tx->fc & IEEE80211_FCTL_ORDER)) {
+ if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
+ purge_old_ps_buffers(tx->local);
+ if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >=
+ AP_MAX_BC_BUFFER) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: BC TX buffer full - "
+ "dropping the oldest frame\n",
+ tx->dev->name);
+ }
+ dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf));
+ } else
+ tx->local->total_ps_buffered++;
+ skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb);
+ return TXRX_QUEUED;
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static inline ieee80211_txrx_result
+ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx)
+{
+ struct sta_info *sta = tx->sta;
+
+ if (unlikely(!sta ||
+ ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT &&
+ (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP)))
+ return TXRX_CONTINUE;
+
+ if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) {
+ struct ieee80211_tx_packet_data *pkt_data;
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries "
+ "before %d)\n",
+ MAC_ARG(sta->addr), sta->aid,
+ skb_queue_len(&sta->ps_tx_buf));
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+ sta->flags |= WLAN_STA_TIM;
+ if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
+ purge_old_ps_buffers(tx->local);
+ if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) {
+ struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf);
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: STA " MAC_FMT " TX "
+ "buffer full - dropping oldest frame\n",
+ tx->dev->name, MAC_ARG(sta->addr));
+ }
+ dev_kfree_skb(old);
+ } else
+ tx->local->total_ps_buffered++;
+ /* Queue frame to be sent after STA sends an PS Poll frame */
+ if (skb_queue_empty(&sta->ps_tx_buf)) {
+ if (tx->local->ops->set_tim)
+ tx->local->ops->set_tim(local_to_hw(tx->local),
+ sta->aid, 1);
+ if (tx->sdata->bss)
+ bss_tim_set(tx->local, tx->sdata->bss, sta->aid);
+ }
+ pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb;
+ pkt_data->jiffies = jiffies;
+ skb_queue_tail(&sta->ps_tx_buf, tx->skb);
+ return TXRX_QUEUED;
+ }
+#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
+ else if (unlikely(sta->flags & WLAN_STA_PS)) {
+ printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll "
+ "set -> send frame\n", tx->dev->name,
+ MAC_ARG(sta->addr));
+ }
+#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
+ sta->pspoll = 0;
+
+ return TXRX_CONTINUE;
+}
+
+
+static ieee80211_txrx_result
+ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx)
+{
+ if (unlikely(tx->u.tx.ps_buffered))
+ return TXRX_CONTINUE;
+
+ if (tx->u.tx.unicast)
+ return ieee80211_tx_h_unicast_ps_buf(tx);
+ else
+ return ieee80211_tx_h_multicast_ps_buf(tx);
+}
+
+
+
+
+static ieee80211_txrx_result
+ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx)
+{
+ if (tx->sta)
+ tx->u.tx.control->key_idx = tx->sta->key_idx_compression;
+ else
+ tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID;
+
+ if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
+ tx->key = NULL;
+ else if (tx->sta && tx->sta->key)
+ tx->key = tx->sta->key;
+ else if (tx->sdata->default_key)
+ tx->key = tx->sdata->default_key;
+ else if (tx->sdata->drop_unencrypted &&
+ !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) {
+ I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
+ return TXRX_DROP;
+ } else
+ tx->key = NULL;
+
+ if (tx->key) {
+ tx->key->tx_rx_count++;
+ if (unlikely(tx->local->key_tx_rx_threshold &&
+ tx->key->tx_rx_count >
+ tx->local->key_tx_rx_threshold)) {
+ ieee80211_key_threshold_notify(tx->dev, tx->key,
+ tx->sta);
+ }
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
+ size_t hdrlen, per_fragm, num_fragm, payload_len, left;
+ struct sk_buff **frags, *first, *frag;
+ int i;
+ u16 seq;
+ u8 *pos;
+ int frag_threshold = tx->local->fragmentation_threshold;
+
+ if (!tx->fragmented)
+ return TXRX_CONTINUE;
+
+ first = tx->skb;
+
+ hdrlen = ieee80211_get_hdrlen(tx->fc);
+ payload_len = first->len - hdrlen;
+ per_fragm = frag_threshold - hdrlen - FCS_LEN;
+ num_fragm = (payload_len + per_fragm - 1) / per_fragm;
+
+ frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC);
+ if (!frags)
+ goto fail;
+
+ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
+ seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ;
+ pos = first->data + hdrlen + per_fragm;
+ left = payload_len - per_fragm;
+ for (i = 0; i < num_fragm - 1; i++) {
+ struct ieee80211_hdr *fhdr;
+ size_t copylen;
+
+ if (left <= 0)
+ goto fail;
+
+ /* reserve enough extra head and tail room for possible
+ * encryption */
+ frag = frags[i] =
+ dev_alloc_skb(tx->local->tx_headroom +
+ frag_threshold +
+ IEEE80211_ENCRYPT_HEADROOM +
+ IEEE80211_ENCRYPT_TAILROOM);
+ if (!frag)
+ goto fail;
+ /* Make sure that all fragments use the same priority so
+ * that they end up using the same TX queue */
+ frag->priority = first->priority;
+ skb_reserve(frag, tx->local->tx_headroom +
+ IEEE80211_ENCRYPT_HEADROOM);
+ fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen);
+ memcpy(fhdr, first->data, hdrlen);
+ if (i == num_fragm - 2)
+ fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS);
+ fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG));
+ copylen = left > per_fragm ? per_fragm : left;
+ memcpy(skb_put(frag, copylen), pos, copylen);
+
+ pos += copylen;
+ left -= copylen;
+ }
+ skb_trim(first, hdrlen + per_fragm);
+
+ tx->u.tx.num_extra_frag = num_fragm - 1;
+ tx->u.tx.extra_frag = frags;
+
+ return TXRX_CONTINUE;
+
+ fail:
+ printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name);
+ if (frags) {
+ for (i = 0; i < num_fragm - 1; i++)
+ if (frags[i])
+ dev_kfree_skb(frags[i]);
+ kfree(frags);
+ }
+ I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment);
+ return TXRX_DROP;
+}
+
+static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb)
+{
+ if (tx->key->force_sw_encrypt) {
+ if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
+ return -1;
+ } else {
+ tx->u.tx.control->key_idx = tx->key->hw_key_idx;
+ if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
+ if (ieee80211_wep_add_iv(tx->local, skb, tx->key) ==
+ NULL)
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static ieee80211_txrx_result
+ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
+ u16 fc;
+
+ fc = le16_to_cpu(hdr->frame_control);
+
+ if (!tx->key || tx->key->alg != ALG_WEP ||
+ ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
+ ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
+ (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)))
+ return TXRX_CONTINUE;
+
+ tx->u.tx.control->iv_len = WEP_IV_LEN;
+ tx->u.tx.control->icv_len = WEP_ICV_LEN;
+ ieee80211_tx_set_iswep(tx);
+
+ if (wep_encrypt_skb(tx, tx->skb) < 0) {
+ I802_DEBUG_INC(tx->local->tx_handlers_drop_wep);
+ return TXRX_DROP;
+ }
+
+ if (tx->u.tx.extra_frag) {
+ int i;
+ for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
+ if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) {
+ I802_DEBUG_INC(tx->local->
+ tx_handlers_drop_wep);
+ return TXRX_DROP;
+ }
+ }
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx)
+{
+ struct rate_control_extra extra;
+
+ memset(&extra, 0, sizeof(extra));
+ extra.mode = tx->u.tx.mode;
+ extra.mgmt_data = tx->sdata &&
+ tx->sdata->type == IEEE80211_IF_TYPE_MGMT;
+ extra.ethertype = tx->ethertype;
+
+ tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb,
+ &extra);
+ if (unlikely(extra.probe != NULL)) {
+ tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE;
+ tx->u.tx.probe_last_frag = 1;
+ tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val;
+ tx->u.tx.rate = extra.probe;
+ } else {
+ tx->u.tx.control->alt_retry_rate = -1;
+ }
+ if (!tx->u.tx.rate)
+ return TXRX_DROP;
+ if (tx->u.tx.mode->mode == MODE_IEEE80211G &&
+ tx->sdata->use_protection && tx->fragmented &&
+ extra.nonerp) {
+ tx->u.tx.last_frag_rate = tx->u.tx.rate;
+ tx->u.tx.probe_last_frag = extra.probe ? 1 : 0;
+
+ tx->u.tx.rate = extra.nonerp;
+ tx->u.tx.control->rate = extra.nonerp;
+ tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE;
+ } else {
+ tx->u.tx.last_frag_rate = tx->u.tx.rate;
+ tx->u.tx.control->rate = tx->u.tx.rate;
+ }
+ tx->u.tx.control->tx_rate = tx->u.tx.rate->val;
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
+ u16 fc = le16_to_cpu(hdr->frame_control);
+ u16 dur;
+ struct ieee80211_tx_control *control = tx->u.tx.control;
+ struct ieee80211_hw_mode *mode = tx->u.tx.mode;
+
+ if (!is_multicast_ether_addr(hdr->addr1)) {
+ if (tx->skb->len + FCS_LEN > tx->local->rts_threshold &&
+ tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) {
+ control->flags |= IEEE80211_TXCTL_USE_RTS_CTS;
+ control->flags |= IEEE80211_TXCTL_LONG_RETRY_LIMIT;
+ control->retry_limit =
+ tx->local->long_retry_limit;
+ } else {
+ control->retry_limit =
+ tx->local->short_retry_limit;
+ }
+ } else {
+ control->retry_limit = 1;
+ }
+
+ if (tx->fragmented) {
+ /* Do not use multiple retry rates when sending fragmented
+ * frames.
+ * TODO: The last fragment could still use multiple retry
+ * rates. */
+ control->alt_retry_rate = -1;
+ }
+
+ /* Use CTS protection for unicast frames sent using extended rates if
+ * there are associated non-ERP stations and RTS/CTS is not configured
+ * for the frame. */
+ if (mode->mode == MODE_IEEE80211G &&
+ (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) &&
+ tx->u.tx.unicast && tx->sdata->use_protection &&
+ !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS))
+ control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT;
+
+ /* Transmit data frames using short preambles if the driver supports
+ * short preambles at the selected rate and short preambles are
+ * available on the network at the current point in time. */
+ if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
+ (tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) &&
+ tx->sdata->short_preamble &&
+ (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) {
+ tx->u.tx.control->tx_rate = tx->u.tx.rate->val2;
+ }
+
+ /* Setup duration field for the first fragment of the frame. Duration
+ * for remaining fragments will be updated when they are being sent
+ * to low-level driver in ieee80211_tx(). */
+ dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1),
+ tx->fragmented ? tx->u.tx.extra_frag[0]->len :
+ 0);
+ hdr->duration_id = cpu_to_le16(dur);
+
+ if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
+ (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
+ struct ieee80211_rate *rate;
+
+ /* Do not use multiple retry rates when using RTS/CTS */
+ control->alt_retry_rate = -1;
+
+ /* Use min(data rate, max base rate) as CTS/RTS rate */
+ rate = tx->u.tx.rate;
+ while (rate > mode->rates &&
+ !(rate->flags & IEEE80211_RATE_BASIC))
+ rate--;
+
+ control->rts_cts_rate = rate->val;
+ control->rts_rate = rate;
+ }
+
+ if (tx->sta) {
+ tx->sta->tx_packets++;
+ tx->sta->tx_fragments++;
+ tx->sta->tx_bytes += tx->skb->len;
+ if (tx->u.tx.extra_frag) {
+ int i;
+ tx->sta->tx_fragments += tx->u.tx.num_extra_frag;
+ for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
+ tx->sta->tx_bytes +=
+ tx->u.tx.extra_frag[i]->len;
+ }
+ }
+ }
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result
+ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_local *local = tx->local;
+ struct ieee80211_hw_mode *mode = tx->u.tx.mode;
+ struct sk_buff *skb = tx->skb;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ u32 load = 0, hdrtime;
+
+ /* TODO: this could be part of tx_status handling, so that the number
+ * of retries would be known; TX rate should in that case be stored
+ * somewhere with the packet */
+
+ /* Estimate total channel use caused by this frame */
+
+ /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
+ * 1 usec = 1/8 * (1080 / 10) = 13.5 */
+
+ if (mode->mode == MODE_IEEE80211A ||
+ mode->mode == MODE_ATHEROS_TURBO ||
+ mode->mode == MODE_ATHEROS_TURBOG ||
+ (mode->mode == MODE_IEEE80211G &&
+ tx->u.tx.rate->flags & IEEE80211_RATE_ERP))
+ hdrtime = CHAN_UTIL_HDR_SHORT;
+ else
+ hdrtime = CHAN_UTIL_HDR_LONG;
+
+ load = hdrtime;
+ if (!is_multicast_ether_addr(hdr->addr1))
+ load += hdrtime;
+
+ if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
+ load += 2 * hdrtime;
+ else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
+ load += hdrtime;
+
+ load += skb->len * tx->u.tx.rate->rate_inv;
+
+ if (tx->u.tx.extra_frag) {
+ int i;
+ for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
+ load += 2 * hdrtime;
+ load += tx->u.tx.extra_frag[i]->len *
+ tx->u.tx.rate->rate;
+ }
+ }
+
+ /* Divide channel_use by 8 to avoid wrapping around the counter */
+ load >>= CHAN_UTIL_SHIFT;
+ local->channel_use_raw += load;
+ if (tx->sta)
+ tx->sta->channel_use_raw += load;
+ tx->sdata->channel_use_raw += load;
+
+ return TXRX_CONTINUE;
+}
+
+/* TODO: implement register/unregister functions for adding TX/RX handlers
+ * into ordered list */
+
+ieee80211_tx_handler ieee80211_tx_handlers[] =
+{
+ ieee80211_tx_h_check_assoc,
+ ieee80211_tx_h_sequence,
+ ieee80211_tx_h_ps_buf,
+ ieee80211_tx_h_select_key,
+ ieee80211_tx_h_michael_mic_add,
+ ieee80211_tx_h_fragment,
+ ieee80211_tx_h_tkip_encrypt,
+ ieee80211_tx_h_ccmp_encrypt,
+ ieee80211_tx_h_wep_encrypt,
+ ieee80211_tx_h_rate_ctrl,
+ ieee80211_tx_h_misc,
+ ieee80211_tx_h_load_stats,
+ NULL
+};
+
+/* actual transmit path */
+
+/*
+ * deal with packet injection down monitor interface
+ * with Radiotap Header -- only called for monitor mode interface
+ */
+static ieee80211_txrx_result
+__ieee80211_parse_tx_radiotap(
+ struct ieee80211_txrx_data *tx,
+ struct sk_buff *skb, struct ieee80211_tx_control *control)
+{
+ /*
+ * this is the moment to interpret and discard the radiotap header that
+ * must be at the start of the packet injected in Monitor mode
+ *
+ * Need to take some care with endian-ness since radiotap
+ * args are little-endian
+ */
+
+ struct ieee80211_radiotap_iterator iterator;
+ struct ieee80211_radiotap_header *rthdr =
+ (struct ieee80211_radiotap_header *) skb->data;
+ struct ieee80211_hw_mode *mode = tx->local->hw.conf.mode;
+ int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len);
+
+ /*
+ * default control situation for all injected packets
+ * FIXME: this does not suit all usage cases, expand to allow control
+ */
+
+ control->retry_limit = 1; /* no retry */
+ control->key_idx = -1; /* no encryption key */
+ control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS |
+ IEEE80211_TXCTL_USE_CTS_PROTECT);
+ control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT |
+ IEEE80211_TXCTL_NO_ACK;
+ control->antenna_sel_tx = 0; /* default to default antenna */
+
+ /*
+ * for every radiotap entry that is present
+ * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
+ * entries present, or -EINVAL on error)
+ */
+
+ while (!ret) {
+ int i, target_rate;
+
+ ret = ieee80211_radiotap_iterator_next(&iterator);
+
+ if (ret)
+ continue;
+
+ /* see if this argument is something we can use */
+ switch (iterator.this_arg_index) {
+ /*
+ * You must take care when dereferencing iterator.this_arg
+ * for multibyte types... the pointer is not aligned. Use
+ * get_unaligned((type *)iterator.this_arg) to dereference
+ * iterator.this_arg for type "type" safely on all arches.
+ */
+ case IEEE80211_RADIOTAP_RATE:
+ /*
+ * radiotap rate u8 is in 500kbps units eg, 0x02=1Mbps
+ * ieee80211 rate int is in 100kbps units eg, 0x0a=1Mbps
+ */
+ target_rate = (*iterator.this_arg) * 5;
+ for (i = 0; i < mode->num_rates; i++) {
+ struct ieee80211_rate *r = &mode->rates[i];
+
+ if (r->rate > target_rate)
+ continue;
+
+ control->rate = r;
+
+ if (r->flags & IEEE80211_RATE_PREAMBLE2)
+ control->tx_rate = r->val2;
+ else
+ control->tx_rate = r->val;
+
+ /* end on exact match */
+ if (r->rate == target_rate)
+ i = mode->num_rates;
+ }
+ break;
+
+ case IEEE80211_RADIOTAP_ANTENNA:
+ /*
+ * radiotap uses 0 for 1st ant, mac80211 is 1 for
+ * 1st ant
+ */
+ control->antenna_sel_tx = (*iterator.this_arg) + 1;
+ break;
+
+ case IEEE80211_RADIOTAP_DBM_TX_POWER:
+ control->power_level = *iterator.this_arg;
+ break;
+
+ case IEEE80211_RADIOTAP_FLAGS:
+ if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
+ /*
+ * this indicates that the skb we have been
+ * handed has the 32-bit FCS CRC at the end...
+ * we should react to that by snipping it off
+ * because it will be recomputed and added
+ * on transmission
+ */
+ if (skb->len < (iterator.max_length + FCS_LEN))
+ return TXRX_DROP;
+
+ skb_trim(skb, skb->len - FCS_LEN);
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
+ return TXRX_DROP;
+
+ /*
+ * remove the radiotap header
+ * iterator->max_length was sanity-checked against
+ * skb->len by iterator init
+ */
+ skb_pull(skb, iterator.max_length);
+
+ return TXRX_CONTINUE;
+}
+
+static ieee80211_txrx_result inline
+__ieee80211_tx_prepare(struct ieee80211_txrx_data *tx,
+ struct sk_buff *skb,
+ struct net_device *dev,
+ struct ieee80211_tx_control *control)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_sub_if_data *sdata;
+ ieee80211_txrx_result res = TXRX_CONTINUE;
+
+ int hdrlen;
+
+ memset(tx, 0, sizeof(*tx));
+ tx->skb = skb;
+ tx->dev = dev; /* use original interface */
+ tx->local = local;
+ tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ tx->sta = sta_info_get(local, hdr->addr1);
+ tx->fc = le16_to_cpu(hdr->frame_control);
+
+ /*
+ * set defaults for things that can be set by
+ * injected radiotap headers
+ */
+ control->power_level = local->hw.conf.power_level;
+ control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
+ if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta)
+ control->antenna_sel_tx = tx->sta->antenna_sel_tx;
+
+ /* process and remove the injection radiotap header */
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (unlikely(sdata->type == IEEE80211_IF_TYPE_MNTR)) {
+ if (__ieee80211_parse_tx_radiotap(tx, skb, control) ==
+ TXRX_DROP) {
+ return TXRX_DROP;
+ }
+ /*
+ * we removed the radiotap header after this point,
+ * we filled control with what we could use
+ * set to the actual ieee header now
+ */
+ hdr = (struct ieee80211_hdr *) skb->data;
+ res = TXRX_QUEUED; /* indication it was monitor packet */
+ }
+
+ tx->u.tx.control = control;
+ tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1);
+ if (is_multicast_ether_addr(hdr->addr1))
+ control->flags |= IEEE80211_TXCTL_NO_ACK;
+ else
+ control->flags &= ~IEEE80211_TXCTL_NO_ACK;
+ tx->fragmented = local->fragmentation_threshold <
+ IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast &&
+ skb->len + FCS_LEN > local->fragmentation_threshold &&
+ (!local->ops->set_frag_threshold);
+ if (!tx->sta)
+ control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
+ else if (tx->sta->clear_dst_mask) {
+ control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
+ tx->sta->clear_dst_mask = 0;
+ }
+ hdrlen = ieee80211_get_hdrlen(tx->fc);
+ if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) {
+ u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)];
+ tx->ethertype = (pos[0] << 8) | pos[1];
+ }
+ control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT;
+
+ return res;
+}
+
+/* Device in tx->dev has a reference added; use dev_put(tx->dev) when
+ * finished with it. */
+static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx,
+ struct sk_buff *skb,
+ struct net_device *mdev,
+ struct ieee80211_tx_control *control)
+{
+ struct ieee80211_tx_packet_data *pkt_data;
+ struct net_device *dev;
+
+ pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
+ dev = dev_get_by_index(pkt_data->ifindex);
+ if (unlikely(dev && !is_ieee80211_device(dev, mdev))) {
+ dev_put(dev);
+ dev = NULL;
+ }
+ if (unlikely(!dev))
+ return -ENODEV;
+ __ieee80211_tx_prepare(tx, skb, dev, control);
+ return 0;
+}
+
+static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb,
+ struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_tx_control *control = tx->u.tx.control;
+ int ret, i;
+
+ if (!ieee80211_qdisc_installed(local->mdev) &&
+ __ieee80211_queue_stopped(local, 0)) {
+ netif_stop_queue(local->mdev);
+ return IEEE80211_TX_AGAIN;
+ }
+ if (skb) {
+ ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb);
+ ret = local->ops->tx(local_to_hw(local), skb, control);
+ if (ret)
+ return IEEE80211_TX_AGAIN;
+ local->mdev->trans_start = jiffies;
+ ieee80211_led_tx(local, 1);
+ }
+ if (tx->u.tx.extra_frag) {
+ control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS |
+ IEEE80211_TXCTL_USE_CTS_PROTECT |
+ IEEE80211_TXCTL_CLEAR_DST_MASK |
+ IEEE80211_TXCTL_FIRST_FRAGMENT);
+ for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
+ if (!tx->u.tx.extra_frag[i])
+ continue;
+ if (__ieee80211_queue_stopped(local, control->queue))
+ return IEEE80211_TX_FRAG_AGAIN;
+ if (i == tx->u.tx.num_extra_frag) {
+ control->tx_rate = tx->u.tx.last_frag_hwrate;
+ control->rate = tx->u.tx.last_frag_rate;
+ if (tx->u.tx.probe_last_frag)
+ control->flags |=
+ IEEE80211_TXCTL_RATE_CTRL_PROBE;
+ else
+ control->flags &=
+ ~IEEE80211_TXCTL_RATE_CTRL_PROBE;
+ }
+
+ ieee80211_dump_frame(local->mdev->name,
+ "TX to low-level driver",
+ tx->u.tx.extra_frag[i]);
+ ret = local->ops->tx(local_to_hw(local),
+ tx->u.tx.extra_frag[i],
+ control);
+ if (ret)
+ return IEEE80211_TX_FRAG_AGAIN;
+ local->mdev->trans_start = jiffies;
+ ieee80211_led_tx(local, 1);
+ tx->u.tx.extra_frag[i] = NULL;
+ }
+ kfree(tx->u.tx.extra_frag);
+ tx->u.tx.extra_frag = NULL;
+ }
+ return IEEE80211_TX_OK;
+}
+
+static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
+ struct ieee80211_tx_control *control, int mgmt)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct sta_info *sta;
+ ieee80211_tx_handler *handler;
+ struct ieee80211_txrx_data tx;
+ ieee80211_txrx_result res = TXRX_DROP, res_prepare;
+ int ret, i;
+
+ WARN_ON(__ieee80211_queue_pending(local, control->queue));
+
+ if (unlikely(skb->len < 10)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ res_prepare = __ieee80211_tx_prepare(&tx, skb, dev, control);
+
+ if (res_prepare == TXRX_DROP) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ sta = tx.sta;
+ tx.u.tx.mgmt_interface = mgmt;
+ tx.u.tx.mode = local->hw.conf.mode;
+
+ if (res_prepare == TXRX_QUEUED) { /* if it was an injected packet */
+ res = TXRX_CONTINUE;
+ } else {
+ for (handler = local->tx_handlers; *handler != NULL;
+ handler++) {
+ res = (*handler)(&tx);
+ if (res != TXRX_CONTINUE)
+ break;
+ }
+ }
+
+ skb = tx.skb; /* handlers are allowed to change skb */
+
+ if (sta)
+ sta_info_put(sta);
+
+ if (unlikely(res == TXRX_DROP)) {
+ I802_DEBUG_INC(local->tx_handlers_drop);
+ goto drop;
+ }
+
+ if (unlikely(res == TXRX_QUEUED)) {
+ I802_DEBUG_INC(local->tx_handlers_queued);
+ return 0;
+ }
+
+ if (tx.u.tx.extra_frag) {
+ for (i = 0; i < tx.u.tx.num_extra_frag; i++) {
+ int next_len, dur;
+ struct ieee80211_hdr *hdr =
+ (struct ieee80211_hdr *)
+ tx.u.tx.extra_frag[i]->data;
+
+ if (i + 1 < tx.u.tx.num_extra_frag) {
+ next_len = tx.u.tx.extra_frag[i + 1]->len;
+ } else {
+ next_len = 0;
+ tx.u.tx.rate = tx.u.tx.last_frag_rate;
+ tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val;
+ }
+ dur = ieee80211_duration(&tx, 0, next_len);
+ hdr->duration_id = cpu_to_le16(dur);
+ }
+ }
+
+retry:
+ ret = __ieee80211_tx(local, skb, &tx);
+ if (ret) {
+ struct ieee80211_tx_stored_packet *store =
+ &local->pending_packet[control->queue];
+
+ if (ret == IEEE80211_TX_FRAG_AGAIN)
+ skb = NULL;
+ set_bit(IEEE80211_LINK_STATE_PENDING,
+ &local->state[control->queue]);
+ smp_mb();
+ /* When the driver gets out of buffers during sending of
+ * fragments and calls ieee80211_stop_queue, there is
+ * a small window between IEEE80211_LINK_STATE_XOFF and
+ * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer
+ * gets available in that window (i.e. driver calls
+ * ieee80211_wake_queue), we would end up with ieee80211_tx
+ * called with IEEE80211_LINK_STATE_PENDING. Prevent this by
+ * continuing transmitting here when that situation is
+ * possible to have happened. */
+ if (!__ieee80211_queue_stopped(local, control->queue)) {
+ clear_bit(IEEE80211_LINK_STATE_PENDING,
+ &local->state[control->queue]);
+ goto retry;
+ }
+ memcpy(&store->control, control,
+ sizeof(struct ieee80211_tx_control));
+ store->skb = skb;
+ store->extra_frag = tx.u.tx.extra_frag;
+ store->num_extra_frag = tx.u.tx.num_extra_frag;
+ store->last_frag_hwrate = tx.u.tx.last_frag_hwrate;
+ store->last_frag_rate = tx.u.tx.last_frag_rate;
+ store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag;
+ }
+ return 0;
+
+ drop:
+ if (skb)
+ dev_kfree_skb(skb);
+ for (i = 0; i < tx.u.tx.num_extra_frag; i++)
+ if (tx.u.tx.extra_frag[i])
+ dev_kfree_skb(tx.u.tx.extra_frag[i]);
+ kfree(tx.u.tx.extra_frag);
+ return 0;
+}
+
+/* device xmit handlers */
+
+int ieee80211_master_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ieee80211_tx_control control;
+ struct ieee80211_tx_packet_data *pkt_data;
+ struct net_device *odev = NULL;
+ struct ieee80211_sub_if_data *osdata;
+ int headroom;
+ int ret;
+
+ /*
+ * copy control out of the skb so other people can use skb->cb
+ */
+ pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
+ memset(&control, 0, sizeof(struct ieee80211_tx_control));
+
+ if (pkt_data->ifindex)
+ odev = dev_get_by_index(pkt_data->ifindex);
+ if (unlikely(odev && !is_ieee80211_device(odev, dev))) {
+ dev_put(odev);
+ odev = NULL;
+ }
+ if (unlikely(!odev)) {
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ printk(KERN_DEBUG "%s: Discarded packet with nonexistent "
+ "originating device\n", dev->name);
+#endif
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ osdata = IEEE80211_DEV_TO_SUB_IF(odev);
+
+ headroom = osdata->local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM;
+ if (skb_headroom(skb) < headroom) {
+ if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
+ dev_kfree_skb(skb);
+ dev_put(odev);
+ return 0;
+ }
+ }
+
+ control.ifindex = odev->ifindex;
+ control.type = osdata->type;
+ if (pkt_data->req_tx_status)
+ control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS;
+ if (pkt_data->do_not_encrypt)
+ control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT;
+ if (pkt_data->requeue)
+ control.flags |= IEEE80211_TXCTL_REQUEUE;
+ control.queue = pkt_data->queue;
+
+ ret = ieee80211_tx(odev, skb, &control,
+ control.type == IEEE80211_IF_TYPE_MGMT);
+ dev_put(odev);
+
+ return ret;
+}
+
+int ieee80211_monitor_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_tx_packet_data *pkt_data;
+ struct ieee80211_radiotap_header *prthdr =
+ (struct ieee80211_radiotap_header *)skb->data;
+ u16 len_rthdr;
+
+ /* check for not even having the fixed radiotap header part */
+ if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
+ goto fail; /* too short to be possibly valid */
+
+ /* is it a header version we can trust to find length from? */
+ if (unlikely(prthdr->it_version))
+ goto fail; /* only version 0 is supported */
+
+ /* then there must be a radiotap header with a length we can use */
+ len_rthdr = ieee80211_get_radiotap_len(skb->data);
+
+ /* does the skb contain enough to deliver on the alleged length? */
+ if (unlikely(skb->len < len_rthdr))
+ goto fail; /* skb too short for claimed rt header extent */
+
+ skb->dev = local->mdev;
+
+ pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
+ memset(pkt_data, 0, sizeof(*pkt_data));
+ /* needed because we set skb device to master */
+ pkt_data->ifindex = dev->ifindex;
+
+ pkt_data->mgmt_iface = 0;
+ pkt_data->do_not_encrypt = 1;
+
+ /*
+ * fix up the pointers accounting for the radiotap
+ * header still being in there. We are being given
+ * a precooked IEEE80211 header so no need for
+ * normal processing
+ */
+ skb_set_mac_header(skb, len_rthdr);
+ /*
+ * these are just fixed to the end of the rt area since we
+ * don't have any better information and at this point, nobody cares
+ */
+ skb_set_network_header(skb, len_rthdr);
+ skb_set_transport_header(skb, len_rthdr);
+
+ /* pass the radiotap header up to the next stage intact */
+ dev_queue_xmit(skb);
+ return NETDEV_TX_OK;
+
+fail:
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK; /* meaning, we dealt with the skb */
+}
+
+/**
+ * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
+ * subinterfaces (wlan#, WDS, and VLAN interfaces)
+ * @skb: packet to be sent
+ * @dev: incoming interface
+ *
+ * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
+ * not be freed, and caller is responsible for either retrying later or freeing
+ * skb).
+ *
+ * This function takes in an Ethernet header and encapsulates it with suitable
+ * IEEE 802.11 header based on which interface the packet is coming in. The
+ * encapsulated packet will then be passed to master interface, wlan#.11, for
+ * transmission (through low-level driver).
+ */
+int ieee80211_subif_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_tx_packet_data *pkt_data;
+ struct ieee80211_sub_if_data *sdata;
+ int ret = 1, head_need;
+ u16 ethertype, hdrlen, fc;
+ struct ieee80211_hdr hdr;
+ const u8 *encaps_data;
+ int encaps_len, skip_header_bytes;
+ int nh_pos, h_pos, no_encrypt = 0;
+ struct sta_info *sta;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (unlikely(skb->len < ETH_HLEN)) {
+ printk(KERN_DEBUG "%s: short skb (len=%d)\n",
+ dev->name, skb->len);
+ ret = 0;
+ goto fail;
+ }
+
+ nh_pos = skb_network_header(skb) - skb->data;
+ h_pos = skb_transport_header(skb) - skb->data;
+
+ /* convert Ethernet header to proper 802.11 header (based on
+ * operation mode) */
+ ethertype = (skb->data[12] << 8) | skb->data[13];
+ /* TODO: handling for 802.1x authorized/unauthorized port */
+ fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
+
+ if (likely(sdata->type == IEEE80211_IF_TYPE_AP ||
+ sdata->type == IEEE80211_IF_TYPE_VLAN)) {
+ fc |= IEEE80211_FCTL_FROMDS;
+ /* DA BSSID SA */
+ memcpy(hdr.addr1, skb->data, ETH_ALEN);
+ memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
+ memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
+ hdrlen = 24;
+ } else if (sdata->type == IEEE80211_IF_TYPE_WDS) {
+ fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS;
+ /* RA TA DA SA */
+ memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
+ memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN);
+ memcpy(hdr.addr3, skb->data, ETH_ALEN);
+ memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
+ hdrlen = 30;
+ } else if (sdata->type == IEEE80211_IF_TYPE_STA) {
+ fc |= IEEE80211_FCTL_TODS;
+ /* BSSID SA DA */
+ memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN);
+ memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
+ memcpy(hdr.addr3, skb->data, ETH_ALEN);
+ hdrlen = 24;
+ } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
+ /* DA SA BSSID */
+ memcpy(hdr.addr1, skb->data, ETH_ALEN);
+ memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
+ memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN);
+ hdrlen = 24;
+ } else {
+ ret = 0;
+ goto fail;
+ }
+
+ /* receiver is QoS enabled, use a QoS type frame */
+ sta = sta_info_get(local, hdr.addr1);
+ if (sta) {
+ if (sta->flags & WLAN_STA_WME) {
+ fc |= IEEE80211_STYPE_QOS_DATA;
+ hdrlen += 2;
+ }
+ sta_info_put(sta);
+ }
+
+ hdr.frame_control = cpu_to_le16(fc);
+ hdr.duration_id = 0;
+ hdr.seq_ctrl = 0;
+
+ skip_header_bytes = ETH_HLEN;
+ if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
+ encaps_data = bridge_tunnel_header;
+ encaps_len = sizeof(bridge_tunnel_header);
+ skip_header_bytes -= 2;
+ } else if (ethertype >= 0x600) {
+ encaps_data = rfc1042_header;
+ encaps_len = sizeof(rfc1042_header);
+ skip_header_bytes -= 2;
+ } else {
+ encaps_data = NULL;
+ encaps_len = 0;
+ }
+
+ skb_pull(skb, skip_header_bytes);
+ nh_pos -= skip_header_bytes;
+ h_pos -= skip_header_bytes;
+
+ /* TODO: implement support for fragments so that there is no need to
+ * reallocate and copy payload; it might be enough to support one
+ * extra fragment that would be copied in the beginning of the frame
+ * data.. anyway, it would be nice to include this into skb structure
+ * somehow
+ *
+ * There are few options for this:
+ * use skb->cb as an extra space for 802.11 header
+ * allocate new buffer if not enough headroom
+ * make sure that there is enough headroom in every skb by increasing
+ * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and
+ * alloc_skb() (net/core/skbuff.c)
+ */
+ head_need = hdrlen + encaps_len + local->tx_headroom;
+ head_need -= skb_headroom(skb);
+
+ /* We are going to modify skb data, so make a copy of it if happens to
+ * be cloned. This could happen, e.g., with Linux bridge code passing
+ * us broadcast frames. */
+
+ if (head_need > 0 || skb_cloned(skb)) {
+#if 0
+ printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes "
+ "of headroom\n", dev->name, head_need);
+#endif
+
+ if (skb_cloned(skb))
+ I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
+ else
+ I802_DEBUG_INC(local->tx_expand_skb_head);
+ /* Since we have to reallocate the buffer, make sure that there
+ * is enough room for possible WEP IV/ICV and TKIP (8 bytes
+ * before payload and 12 after). */
+ if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8),
+ 12, GFP_ATOMIC)) {
+ printk(KERN_DEBUG "%s: failed to reallocate TX buffer"
+ "\n", dev->name);
+ goto fail;
+ }
+ }
+
+ if (encaps_data) {
+ memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
+ nh_pos += encaps_len;
+ h_pos += encaps_len;
+ }
+ memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
+ nh_pos += hdrlen;
+ h_pos += hdrlen;
+
+ pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
+ memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
+ pkt_data->ifindex = dev->ifindex;
+ pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
+ pkt_data->do_not_encrypt = no_encrypt;
+
+ skb->dev = local->mdev;
+ sdata->stats.tx_packets++;
+ sdata->stats.tx_bytes += skb->len;
+
+ /* Update skb pointers to various headers since this modified frame
+ * is going to go through Linux networking code that may potentially
+ * need things like pointer to IP header. */
+ skb_set_mac_header(skb, 0);
+ skb_set_network_header(skb, nh_pos);
+ skb_set_transport_header(skb, h_pos);
+
+ dev->trans_start = jiffies;
+ dev_queue_xmit(skb);
+
+ return 0;
+
+ fail:
+ if (!ret)
+ dev_kfree_skb(skb);
+
+ return ret;
+}
+
+/*
+ * This is the transmit routine for the 802.11 type interfaces
+ * called by upper layers of the linux networking
+ * stack when it has a frame to transmit
+ */
+int ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_tx_packet_data *pkt_data;
+ struct ieee80211_hdr *hdr;
+ u16 fc;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ if (skb->len < 10) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ if (skb_headroom(skb) < sdata->local->tx_headroom) {
+ if (pskb_expand_head(skb, sdata->local->tx_headroom,
+ 0, GFP_ATOMIC)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ }
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+ fc = le16_to_cpu(hdr->frame_control);
+
+ pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
+ memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
+ pkt_data->ifindex = sdata->dev->ifindex;
+ pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
+
+ skb->priority = 20; /* use hardcoded priority for mgmt TX queue */
+ skb->dev = sdata->local->mdev;
+
+ /*
+ * We're using the protocol field of the the frame control header
+ * to request TX callback for hostapd. BIT(1) is checked.
+ */
+ if ((fc & BIT(1)) == BIT(1)) {
+ pkt_data->req_tx_status = 1;
+ fc &= ~BIT(1);
+ hdr->frame_control = cpu_to_le16(fc);
+ }
+
+ pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED);
+
+ sdata->stats.tx_packets++;
+ sdata->stats.tx_bytes += skb->len;
+
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/* helper functions for pending packets for when queues are stopped */
+
+void ieee80211_clear_tx_pending(struct ieee80211_local *local)
+{
+ int i, j;
+ struct ieee80211_tx_stored_packet *store;
+
+ for (i = 0; i < local->hw.queues; i++) {
+ if (!__ieee80211_queue_pending(local, i))
+ continue;
+ store = &local->pending_packet[i];
+ kfree_skb(store->skb);
+ for (j = 0; j < store->num_extra_frag; j++)
+ kfree_skb(store->extra_frag[j]);
+ kfree(store->extra_frag);
+ clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]);
+ }
+}
+
+void ieee80211_tx_pending(unsigned long data)
+{
+ struct ieee80211_local *local = (struct ieee80211_local *)data;
+ struct net_device *dev = local->mdev;
+ struct ieee80211_tx_stored_packet *store;
+ struct ieee80211_txrx_data tx;
+ int i, ret, reschedule = 0;
+
+ netif_tx_lock_bh(dev);
+ for (i = 0; i < local->hw.queues; i++) {
+ if (__ieee80211_queue_stopped(local, i))
+ continue;
+ if (!__ieee80211_queue_pending(local, i)) {
+ reschedule = 1;
+ continue;
+ }
+ store = &local->pending_packet[i];
+ tx.u.tx.control = &store->control;
+ tx.u.tx.extra_frag = store->extra_frag;
+ tx.u.tx.num_extra_frag = store->num_extra_frag;
+ tx.u.tx.last_frag_hwrate = store->last_frag_hwrate;
+ tx.u.tx.last_frag_rate = store->last_frag_rate;
+ tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe;
+ ret = __ieee80211_tx(local, store->skb, &tx);
+ if (ret) {
+ if (ret == IEEE80211_TX_FRAG_AGAIN)
+ store->skb = NULL;
+ } else {
+ clear_bit(IEEE80211_LINK_STATE_PENDING,
+ &local->state[i]);
+ reschedule = 1;
+ }
+ }
+ netif_tx_unlock_bh(dev);
+ if (reschedule) {
+ if (!ieee80211_qdisc_installed(dev)) {
+ if (!__ieee80211_queue_stopped(local, 0))
+ netif_wake_queue(dev);
+ } else
+ netif_schedule(dev);
+ }
+}
+
+/* functions for drivers to get certain frames */
+
+static void ieee80211_beacon_add_tim(struct ieee80211_local *local,
+ struct ieee80211_if_ap *bss,
+ struct sk_buff *skb)
+{
+ u8 *pos, *tim;
+ int aid0 = 0;
+ int i, have_bits = 0, n1, n2;
+
+ /* Generate bitmap for TIM only if there are any STAs in power save
+ * mode. */
+ read_lock_bh(&local->sta_lock);
+ if (atomic_read(&bss->num_sta_ps) > 0)
+ /* in the hope that this is faster than
+ * checking byte-for-byte */
+ have_bits = !bitmap_empty((unsigned long*)bss->tim,
+ IEEE80211_MAX_AID+1);
+
+ if (bss->dtim_count == 0)
+ bss->dtim_count = bss->dtim_period - 1;
+ else
+ bss->dtim_count--;
+
+ tim = pos = (u8 *) skb_put(skb, 6);
+ *pos++ = WLAN_EID_TIM;
+ *pos++ = 4;
+ *pos++ = bss->dtim_count;
+ *pos++ = bss->dtim_period;
+
+ if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf))
+ aid0 = 1;
+
+ if (have_bits) {
+ /* Find largest even number N1 so that bits numbered 1 through
+ * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
+ * (N2 + 1) x 8 through 2007 are 0. */
+ n1 = 0;
+ for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
+ if (bss->tim[i]) {
+ n1 = i & 0xfe;
+ break;
+ }
+ }
+ n2 = n1;
+ for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
+ if (bss->tim[i]) {
+ n2 = i;
+ break;
+ }
+ }
+
+ /* Bitmap control */
+ *pos++ = n1 | aid0;
+ /* Part Virt Bitmap */
+ memcpy(pos, bss->tim + n1, n2 - n1 + 1);
+
+ tim[1] = n2 - n1 + 4;
+ skb_put(skb, n2 - n1);
+ } else {
+ *pos++ = aid0; /* Bitmap control */
+ *pos++ = 0; /* Part Virt Bitmap */
+ }
+ read_unlock_bh(&local->sta_lock);
+}
+
+struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id,
+ struct ieee80211_tx_control *control)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct sk_buff *skb;
+ struct net_device *bdev;
+ struct ieee80211_sub_if_data *sdata = NULL;
+ struct ieee80211_if_ap *ap = NULL;
+ struct ieee80211_rate *rate;
+ struct rate_control_extra extra;
+ u8 *b_head, *b_tail;
+ int bh_len, bt_len;
+
+ bdev = dev_get_by_index(if_id);
+ if (bdev) {
+ sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
+ ap = &sdata->u.ap;
+ dev_put(bdev);
+ }
+
+ if (!ap || sdata->type != IEEE80211_IF_TYPE_AP ||
+ !ap->beacon_head) {
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ if (net_ratelimit())
+ printk(KERN_DEBUG "no beacon data avail for idx=%d "
+ "(%s)\n", if_id, bdev ? bdev->name : "N/A");
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+ return NULL;
+ }
+
+ /* Assume we are generating the normal beacon locally */
+ b_head = ap->beacon_head;
+ b_tail = ap->beacon_tail;
+ bh_len = ap->beacon_head_len;
+ bt_len = ap->beacon_tail_len;
+
+ skb = dev_alloc_skb(local->tx_headroom +
+ bh_len + bt_len + 256 /* maximum TIM len */);
+ if (!skb)
+ return NULL;
+
+ skb_reserve(skb, local->tx_headroom);
+ memcpy(skb_put(skb, bh_len), b_head, bh_len);
+
+ ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data);
+
+ ieee80211_beacon_add_tim(local, ap, skb);
+
+ if (b_tail) {
+ memcpy(skb_put(skb, bt_len), b_tail, bt_len);
+ }
+
+ if (control) {
+ memset(&extra, 0, sizeof(extra));
+ extra.mode = local->oper_hw_mode;
+
+ rate = rate_control_get_rate(local, local->mdev, skb, &extra);
+ if (!rate) {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate "
+ "found\n", local->mdev->name);
+ }
+ dev_kfree_skb(skb);
+ return NULL;
+ }
+
+ control->tx_rate = (sdata->short_preamble &&
+ (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
+ rate->val2 : rate->val;
+ control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
+ control->power_level = local->hw.conf.power_level;
+ control->flags |= IEEE80211_TXCTL_NO_ACK;
+ control->retry_limit = 1;
+ control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
+ }
+
+ ap->num_beacons++;
+ return skb;
+}
+EXPORT_SYMBOL(ieee80211_beacon_get);
+
+void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id,
+ const void *frame, size_t frame_len,
+ const struct ieee80211_tx_control *frame_txctl,
+ struct ieee80211_rts *rts)
+{
+ const struct ieee80211_hdr *hdr = frame;
+ u16 fctl;
+
+ fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS;
+ rts->frame_control = cpu_to_le16(fctl);
+ rts->duration = ieee80211_rts_duration(hw, if_id, frame_len, frame_txctl);
+ memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
+ memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
+}
+EXPORT_SYMBOL(ieee80211_rts_get);
+
+void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id,
+ const void *frame, size_t frame_len,
+ const struct ieee80211_tx_control *frame_txctl,
+ struct ieee80211_cts *cts)
+{
+ const struct ieee80211_hdr *hdr = frame;
+ u16 fctl;
+
+ fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS;
+ cts->frame_control = cpu_to_le16(fctl);
+ cts->duration = ieee80211_ctstoself_duration(hw, if_id, frame_len, frame_txctl);
+ memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
+}
+EXPORT_SYMBOL(ieee80211_ctstoself_get);
+
+struct sk_buff *
+ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id,
+ struct ieee80211_tx_control *control)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct sk_buff *skb;
+ struct sta_info *sta;
+ ieee80211_tx_handler *handler;
+ struct ieee80211_txrx_data tx;
+ ieee80211_txrx_result res = TXRX_DROP;
+ struct net_device *bdev;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_if_ap *bss = NULL;
+
+ bdev = dev_get_by_index(if_id);
+ if (bdev) {
+ sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
+ bss = &sdata->u.ap;
+ dev_put(bdev);
+ }
+ if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head)
+ return NULL;
+
+ if (bss->dtim_count != 0)
+ return NULL; /* send buffered bc/mc only after DTIM beacon */
+ memset(control, 0, sizeof(*control));
+ while (1) {
+ skb = skb_dequeue(&bss->ps_bc_buf);
+ if (!skb)
+ return NULL;
+ local->total_ps_buffered--;
+
+ if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) {
+ struct ieee80211_hdr *hdr =
+ (struct ieee80211_hdr *) skb->data;
+ /* more buffered multicast/broadcast frames ==> set
+ * MoreData flag in IEEE 802.11 header to inform PS
+ * STAs */
+ hdr->frame_control |=
+ cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+ }
+
+ if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0)
+ break;
+ dev_kfree_skb_any(skb);
+ }
+ sta = tx.sta;
+ tx.u.tx.ps_buffered = 1;
+
+ for (handler = local->tx_handlers; *handler != NULL; handler++) {
+ res = (*handler)(&tx);
+ if (res == TXRX_DROP || res == TXRX_QUEUED)
+ break;
+ }
+ dev_put(tx.dev);
+ skb = tx.skb; /* handlers are allowed to change skb */
+
+ if (res == TXRX_DROP) {
+ I802_DEBUG_INC(local->tx_handlers_drop);
+ dev_kfree_skb(skb);
+ skb = NULL;
+ } else if (res == TXRX_QUEUED) {
+ I802_DEBUG_INC(local->tx_handlers_queued);
+ skb = NULL;
+ }
+
+ if (sta)
+ sta_info_put(sta);
+
+ return skb;
+}
+EXPORT_SYMBOL(ieee80211_get_buffered_bc);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
new file mode 100644
index 0000000..091ac0d
--- /dev/null
+++ b/net/mac80211/util.c
@@ -0,0 +1,488 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * utilities for mac80211
+ */
+
+#include <net/mac80211.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/wireless.h>
+#include <linux/bitmap.h>
+#include <net/cfg80211.h>
+
+#include "ieee80211_i.h"
+#include "ieee80211_rate.h"
+#include "wme.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[] =
+ { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
+
+/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
+const unsigned char bridge_tunnel_header[] =
+ { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
+
+/* No encapsulation header if EtherType < 0x600 (=length) */
+static const unsigned char eapol_header[] =
+ { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
+
+
+static int rate_list_match(const int *rate_list, int rate)
+{
+ int i;
+
+ if (!rate_list)
+ return 0;
+
+ for (i = 0; rate_list[i] >= 0; i++)
+ if (rate_list[i] == rate)
+ return 1;
+
+ return 0;
+}
+
+void ieee80211_prepare_rates(struct ieee80211_local *local,
+ struct ieee80211_hw_mode *mode)
+{
+ int i;
+
+ for (i = 0; i < mode->num_rates; i++) {
+ struct ieee80211_rate *rate = &mode->rates[i];
+
+ rate->flags &= ~(IEEE80211_RATE_SUPPORTED |
+ IEEE80211_RATE_BASIC);
+
+ if (local->supp_rates[mode->mode]) {
+ if (!rate_list_match(local->supp_rates[mode->mode],
+ rate->rate))
+ continue;
+ }
+
+ rate->flags |= IEEE80211_RATE_SUPPORTED;
+
+ /* Use configured basic rate set if it is available. If not,
+ * use defaults that are sane for most cases. */
+ if (local->basic_rates[mode->mode]) {
+ if (rate_list_match(local->basic_rates[mode->mode],
+ rate->rate))
+ rate->flags |= IEEE80211_RATE_BASIC;
+ } else switch (mode->mode) {
+ case MODE_IEEE80211A:
+ if (rate->rate == 60 || rate->rate == 120 ||
+ rate->rate == 240)
+ rate->flags |= IEEE80211_RATE_BASIC;
+ break;
+ case MODE_IEEE80211B:
+ if (rate->rate == 10 || rate->rate == 20)
+ rate->flags |= IEEE80211_RATE_BASIC;
+ break;
+ case MODE_ATHEROS_TURBO:
+ if (rate->rate == 120 || rate->rate == 240 ||
+ rate->rate == 480)
+ rate->flags |= IEEE80211_RATE_BASIC;
+ break;
+ case MODE_IEEE80211G:
+ if (rate->rate == 10 || rate->rate == 20 ||
+ rate->rate == 55 || rate->rate == 110)
+ rate->flags |= IEEE80211_RATE_BASIC;
+ break;
+ }
+
+ /* Set ERP and MANDATORY flags based on phymode */
+ switch (mode->mode) {
+ case MODE_IEEE80211A:
+ if (rate->rate == 60 || rate->rate == 120 ||
+ rate->rate == 240)
+ rate->flags |= IEEE80211_RATE_MANDATORY;
+ break;
+ case MODE_IEEE80211B:
+ if (rate->rate == 10)
+ rate->flags |= IEEE80211_RATE_MANDATORY;
+ break;
+ case MODE_ATHEROS_TURBO:
+ break;
+ case MODE_IEEE80211G:
+ if (rate->rate == 10 || rate->rate == 20 ||
+ rate->rate == 55 || rate->rate == 110 ||
+ rate->rate == 60 || rate->rate == 120 ||
+ rate->rate == 240)
+ rate->flags |= IEEE80211_RATE_MANDATORY;
+ break;
+ }
+ if (ieee80211_is_erp_rate(mode->mode, rate->rate))
+ rate->flags |= IEEE80211_RATE_ERP;
+ }
+}
+
+u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
+{
+ u16 fc;
+
+ if (len < 24)
+ return NULL;
+
+ fc = le16_to_cpu(hdr->frame_control);
+
+ switch (fc & IEEE80211_FCTL_FTYPE) {
+ case IEEE80211_FTYPE_DATA:
+ switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
+ case IEEE80211_FCTL_TODS:
+ return hdr->addr1;
+ case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
+ return NULL;
+ case IEEE80211_FCTL_FROMDS:
+ return hdr->addr2;
+ case 0:
+ return hdr->addr3;
+ }
+ break;
+ case IEEE80211_FTYPE_MGMT:
+ return hdr->addr3;
+ case IEEE80211_FTYPE_CTL:
+ if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
+ return hdr->addr1;
+ else
+ return NULL;
+ }
+
+ return NULL;
+}
+
+int ieee80211_get_hdrlen(u16 fc)
+{
+ int hdrlen = 24;
+
+ switch (fc & IEEE80211_FCTL_FTYPE) {
+ case IEEE80211_FTYPE_DATA:
+ if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
+ hdrlen = 30; /* Addr4 */
+ /*
+ * The QoS Control field is two bytes and its presence is
+ * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to
+ * hdrlen if that bit is set.
+ * This works by masking out the bit and shifting it to
+ * bit position 1 so the result has the value 0 or 2.
+ */
+ hdrlen += (fc & IEEE80211_STYPE_QOS_DATA)
+ >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1);
+ break;
+ case IEEE80211_FTYPE_CTL:
+ /*
+ * 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 & 0xE0) == 0xC0)
+ hdrlen = 10;
+ else
+ hdrlen = 16;
+ break;
+ }
+
+ return hdrlen;
+}
+EXPORT_SYMBOL(ieee80211_get_hdrlen);
+
+int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
+{
+ const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data;
+ int hdrlen;
+
+ if (unlikely(skb->len < 10))
+ return 0;
+ hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
+ if (unlikely(hdrlen > skb->len))
+ return 0;
+ return hdrlen;
+}
+EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
+
+int ieee80211_is_eapol(const struct sk_buff *skb)
+{
+ const struct ieee80211_hdr *hdr;
+ u16 fc;
+ int hdrlen;
+
+ if (unlikely(skb->len < 10))
+ return 0;
+
+ hdr = (const struct ieee80211_hdr *) skb->data;
+ fc = le16_to_cpu(hdr->frame_control);
+
+ if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
+ return 0;
+
+ hdrlen = ieee80211_get_hdrlen(fc);
+
+ if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) &&
+ memcmp(skb->data + hdrlen, eapol_header,
+ sizeof(eapol_header)) == 0))
+ return 1;
+
+ return 0;
+}
+
+void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
+
+ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+ if (tx->u.tx.extra_frag) {
+ struct ieee80211_hdr *fhdr;
+ int i;
+ for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
+ fhdr = (struct ieee80211_hdr *)
+ tx->u.tx.extra_frag[i]->data;
+ fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+ }
+ }
+}
+
+int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
+ int rate, int erp, int short_preamble)
+{
+ int dur;
+
+ /* calculate duration (in microseconds, rounded up to next higher
+ * integer if it includes a fractional microsecond) to send frame of
+ * len bytes (does not include FCS) at the given rate. Duration will
+ * also include SIFS.
+ *
+ * rate is in 100 kbps, so divident is multiplied by 10 in the
+ * DIV_ROUND_UP() operations.
+ */
+
+ if (local->hw.conf.phymode == MODE_IEEE80211A || erp ||
+ local->hw.conf.phymode == MODE_ATHEROS_TURBO) {
+ /*
+ * OFDM:
+ *
+ * N_DBPS = DATARATE x 4
+ * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
+ * (16 = SIGNAL time, 6 = tail bits)
+ * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
+ *
+ * T_SYM = 4 usec
+ * 802.11a - 17.5.2: aSIFSTime = 16 usec
+ * 802.11g - 19.8.4: aSIFSTime = 10 usec +
+ * signal ext = 6 usec
+ */
+ /* FIX: Atheros Turbo may have different (shorter) duration? */
+ dur = 16; /* SIFS + signal ext */
+ dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
+ dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
+ dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
+ 4 * rate); /* T_SYM x N_SYM */
+ } else {
+ /*
+ * 802.11b or 802.11g with 802.11b compatibility:
+ * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
+ * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
+ *
+ * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
+ * aSIFSTime = 10 usec
+ * aPreambleLength = 144 usec or 72 usec with short preamble
+ * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
+ */
+ dur = 10; /* aSIFSTime = 10 usec */
+ dur += short_preamble ? (72 + 24) : (144 + 48);
+
+ dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
+ }
+
+ return dur;
+}
+
+/* Exported duration function for driver use */
+__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id,
+ size_t frame_len, int rate)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct net_device *bdev = dev_get_by_index(if_id);
+ struct ieee80211_sub_if_data *sdata;
+ u16 dur;
+ int erp;
+
+ if (unlikely(!bdev))
+ return 0;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
+ erp = ieee80211_is_erp_rate(hw->conf.phymode, rate);
+ dur = ieee80211_frame_duration(local, frame_len, rate,
+ erp, sdata->short_preamble);
+
+ dev_put(bdev);
+ return cpu_to_le16(dur);
+}
+EXPORT_SYMBOL(ieee80211_generic_frame_duration);
+
+__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id,
+ size_t frame_len,
+ const struct ieee80211_tx_control *frame_txctl)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_rate *rate;
+ struct net_device *bdev = dev_get_by_index(if_id);
+ struct ieee80211_sub_if_data *sdata;
+ int short_preamble;
+ int erp;
+ u16 dur;
+
+ if (unlikely(!bdev))
+ return 0;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
+ short_preamble = sdata->short_preamble;
+
+ rate = frame_txctl->rts_rate;
+ erp = !!(rate->flags & IEEE80211_RATE_ERP);
+
+ /* CTS duration */
+ dur = ieee80211_frame_duration(local, 10, rate->rate,
+ erp, short_preamble);
+ /* Data frame duration */
+ dur += ieee80211_frame_duration(local, frame_len, rate->rate,
+ erp, short_preamble);
+ /* ACK duration */
+ dur += ieee80211_frame_duration(local, 10, rate->rate,
+ erp, short_preamble);
+
+ dev_put(bdev);
+ return cpu_to_le16(dur);
+}
+EXPORT_SYMBOL(ieee80211_rts_duration);
+
+__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
+ size_t frame_len,
+ const struct ieee80211_tx_control *frame_txctl)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_rate *rate;
+ struct net_device *bdev = dev_get_by_index(if_id);
+ struct ieee80211_sub_if_data *sdata;
+ int short_preamble;
+ int erp;
+ u16 dur;
+
+ if (unlikely(!bdev))
+ return 0;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(bdev);
+ short_preamble = sdata->short_preamble;
+
+ rate = frame_txctl->rts_rate;
+ erp = !!(rate->flags & IEEE80211_RATE_ERP);
+
+ /* Data frame duration */
+ dur = ieee80211_frame_duration(local, frame_len, rate->rate,
+ erp, short_preamble);
+ if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) {
+ /* ACK duration */
+ dur += ieee80211_frame_duration(local, 10, rate->rate,
+ erp, short_preamble);
+ }
+
+ dev_put(bdev);
+ return cpu_to_le16(dur);
+}
+EXPORT_SYMBOL(ieee80211_ctstoself_duration);
+
+struct ieee80211_rate *
+ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
+{
+ struct ieee80211_hw_mode *mode;
+ int r;
+
+ list_for_each_entry(mode, &local->modes_list, list) {
+ if (mode->mode != phymode)
+ continue;
+ for (r = 0; r < mode->num_rates; r++) {
+ struct ieee80211_rate *rate = &mode->rates[r];
+ if (rate->val == hw_rate ||
+ (rate->flags & IEEE80211_RATE_PREAMBLE2 &&
+ rate->val2 == hw_rate))
+ return rate;
+ }
+ }
+
+ return NULL;
+}
+
+void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF,
+ &local->state[queue])) {
+ if (test_bit(IEEE80211_LINK_STATE_PENDING,
+ &local->state[queue]))
+ tasklet_schedule(&local->tx_pending_tasklet);
+ else
+ if (!ieee80211_qdisc_installed(local->mdev)) {
+ if (queue == 0)
+ netif_wake_queue(local->mdev);
+ } else
+ __netif_schedule(local->mdev);
+ }
+}
+EXPORT_SYMBOL(ieee80211_wake_queue);
+
+void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ if (!ieee80211_qdisc_installed(local->mdev) && queue == 0)
+ netif_stop_queue(local->mdev);
+ set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
+}
+EXPORT_SYMBOL(ieee80211_stop_queue);
+
+void ieee80211_start_queues(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ int i;
+
+ for (i = 0; i < local->hw.queues; i++)
+ clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]);
+ if (!ieee80211_qdisc_installed(local->mdev))
+ netif_start_queue(local->mdev);
+}
+EXPORT_SYMBOL(ieee80211_start_queues);
+
+void ieee80211_stop_queues(struct ieee80211_hw *hw)
+{
+ int i;
+
+ for (i = 0; i < hw->queues; i++)
+ ieee80211_stop_queue(hw, i);
+}
+EXPORT_SYMBOL(ieee80211_stop_queues);
+
+void ieee80211_wake_queues(struct ieee80211_hw *hw)
+{
+ int i;
+
+ for (i = 0; i < hw->queues; i++)
+ ieee80211_wake_queue(hw, i);
+}
+EXPORT_SYMBOL(ieee80211_wake_queues);
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 89ce815..5550d35 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -18,70 +18,6 @@
#include "ieee80211_i.h"
#include "wme.h"
-static inline int WLAN_FC_IS_QOS_DATA(u16 fc)
-{
- return (fc & 0x8C) == 0x88;
-}
-
-
-ieee80211_txrx_result
-ieee80211_rx_h_parse_qos(struct ieee80211_txrx_data *rx)
-{
- u8 *data = rx->skb->data;
- int tid;
-
- /* does the frame have a qos control field? */
- if (WLAN_FC_IS_QOS_DATA(rx->fc)) {
- u8 *qc = data + ieee80211_get_hdrlen(rx->fc) - QOS_CONTROL_LEN;
- /* frame has qos control */
- tid = qc[0] & QOS_CONTROL_TID_MASK;
- } else {
- if (unlikely((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)) {
- /* Separate TID for management frames */
- tid = NUM_RX_DATA_QUEUES - 1;
- } else {
- /* no qos control present */
- tid = 0; /* 802.1d - Best Effort */
- }
- }
-#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
- I802_DEBUG_INC(rx->local->wme_rx_queue[tid]);
- if (rx->sta) {
- I802_DEBUG_INC(rx->sta->wme_rx_queue[tid]);
- }
-#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
-
- rx->u.rx.queue = tid;
- /* Set skb->priority to 1d tag if highest order bit of TID is not set.
- * For now, set skb->priority to 0 for other cases. */
- rx->skb->priority = (tid > 7) ? 0 : tid;
-
- return TXRX_CONTINUE;
-}
-
-
-ieee80211_txrx_result
-ieee80211_rx_h_remove_qos_control(struct ieee80211_txrx_data *rx)
-{
- u16 fc = rx->fc;
- u8 *data = rx->skb->data;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) data;
-
- if (!WLAN_FC_IS_QOS_DATA(fc))
- return TXRX_CONTINUE;
-
- /* remove the qos control field, update frame type and meta-data */
- memmove(data + 2, data, ieee80211_get_hdrlen(fc) - 2);
- hdr = (struct ieee80211_hdr *) skb_pull(rx->skb, 2);
- /* change frame type to non QOS */
- rx->fc = fc &= ~IEEE80211_STYPE_QOS_DATA;
- hdr->frame_control = cpu_to_le16(fc);
-
- return TXRX_CONTINUE;
-}
-
-
-#ifdef CONFIG_NET_SCHED
/* maximum number of hardware queues we support. */
#define TC_80211_MAX_QUEUES 8
@@ -675,4 +611,3 @@ void ieee80211_wme_unregister(void)
{
unregister_qdisc(&wme_qdisc_ops);
}
-#endif /* CONFIG_NET_SCHED */
diff --git a/net/mac80211/wme.h b/net/mac80211/wme.h
index f0bff10..76c713a 100644
--- a/net/mac80211/wme.h
+++ b/net/mac80211/wme.h
@@ -24,11 +24,10 @@
#define QOS_CONTROL_TAG1D_MASK 0x07
-ieee80211_txrx_result
-ieee80211_rx_h_parse_qos(struct ieee80211_txrx_data *rx);
-
-ieee80211_txrx_result
-ieee80211_rx_h_remove_qos_control(struct ieee80211_txrx_data *rx);
+static inline int WLAN_FC_IS_QOS_DATA(u16 fc)
+{
+ return (fc & 0x8C) == 0x88;
+}
#ifdef CONFIG_NET_SCHED
void ieee80211_install_qdisc(struct net_device *dev);
diff --git a/net/wireless/wext.c b/net/wireless/wext.c
index d6aaf65..debf519 100644
--- a/net/wireless/wext.c
+++ b/net/wireless/wext.c
@@ -1129,10 +1129,12 @@ static int rtnetlink_fill_iwinfo(struct sk_buff *skb, struct net_device *dev,
{
struct ifinfomsg *r;
struct nlmsghdr *nlh;
- unsigned char *b = skb_tail_pointer(skb);
- nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r));
- r = NLMSG_DATA(nlh);
+ nlh = nlmsg_put(skb, 0, 0, type, sizeof(*r), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ r = nlmsg_data(nlh);
r->ifi_family = AF_UNSPEC;
r->__ifi_pad = 0;
r->ifi_type = dev->type;
@@ -1141,15 +1143,13 @@ static int rtnetlink_fill_iwinfo(struct sk_buff *skb, struct net_device *dev,
r->ifi_change = 0; /* Wireless changes don't affect those flags */
/* Add the wireless events in the netlink packet */
- RTA_PUT(skb, IFLA_WIRELESS, event_len, event);
+ NLA_PUT(skb, IFLA_WIRELESS, event_len, event);
- nlh->nlmsg_len = skb_tail_pointer(skb) - b;
- return skb->len;
+ return nlmsg_end(skb, nlh);
-nlmsg_failure:
-rtattr_failure:
- nlmsg_trim(skb, b);
- return -1;
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
}
/* ---------------------------------------------------------------- */
@@ -1162,17 +1162,19 @@ rtattr_failure:
static void rtmsg_iwinfo(struct net_device *dev, char *event, int event_len)
{
struct sk_buff *skb;
- int size = NLMSG_GOODSIZE;
+ int err;
- skb = alloc_skb(size, GFP_ATOMIC);
+ skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!skb)
return;
- if (rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK,
- event, event_len) < 0) {
+ err = rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK, event, event_len);
+ if (err < 0) {
+ WARN_ON(err == -EMSGSIZE);
kfree_skb(skb);
return;
}
+
NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
skb_queue_tail(&wireless_nlevent_queue, skb);
tasklet_schedule(&wireless_nlevent_tasklet);
--
John W. Linville
linville@tuxdriver.com
next prev parent reply other threads:[~2007-08-06 21:36 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-06 20:13 Please pull 'fixes-davem' branch of wireless-2.6 John W. Linville
2007-08-06 20:13 ` John W. Linville
2007-08-06 21:01 ` John W. Linville [this message]
2007-08-09 9:00 ` Please pull 'upstream-davem' " David Miller
2007-08-08 1:08 ` Please pull 'fixes-davem' " David Miller
-- strict thread matches above, loose matches on Subject: below --
2008-01-08 19:29 Please pull 'upstream-davem' " John W. Linville
2008-01-09 7:36 ` David Miller
2008-01-09 7:36 ` David Miller
2007-12-20 15:53 John W. Linville
2007-12-20 22:38 ` John W. Linville
2007-12-21 4:04 ` David Miller
2007-12-21 4:04 ` David Miller
2007-12-17 20:55 John W. Linville
2007-12-18 6:57 ` David Miller
2007-12-18 6:57 ` David Miller
2007-12-01 2:23 John W. Linville
2007-12-01 2:23 ` John W. Linville
2007-12-01 13:54 ` Herbert Xu
2007-12-01 13:54 ` Herbert Xu
2007-11-20 22:11 John W. Linville
2007-11-21 1:27 ` David Miller
2007-11-21 1:27 ` David Miller
2007-11-07 3:08 John W. Linville
2007-11-20 5:24 ` David Miller
2007-10-10 0:21 John W. Linville
2007-10-10 1:13 ` David Miller
2007-10-10 1:13 ` David Miller
2007-10-03 1:25 John W. Linville
2007-10-03 1:45 ` John W. Linville
2007-10-03 1:45 ` John W. Linville
2007-10-03 2:01 ` David Miller
2007-10-03 2:01 ` David Miller
2007-10-03 14:10 ` John W. Linville
2007-10-03 14:10 ` John W. Linville
2007-10-03 21:52 ` David Miller
2007-10-03 21:52 ` David Miller
2007-09-15 13:20 John W. Linville
2007-09-15 13:20 ` John W. Linville
2007-08-28 22:50 John W. Linville
2007-08-29 0:21 ` David Miller
2007-08-15 0:32 Please pull 'fixes-davem' " John W. Linville
2007-08-15 0:34 ` Please pull 'upstream-davem' " John W. Linville
2007-08-15 0:34 ` John W. Linville
2007-08-15 23:09 ` David Miller
2007-08-15 23:09 ` David Miller
2007-08-19 23:32 ` David Miller
2007-08-19 23:32 ` David Miller
2007-07-18 2:16 John W. Linville
2007-07-18 2:16 ` John W. Linville
2007-07-18 3:17 ` David Miller
2007-07-18 15:34 ` John W. Linville
2007-07-18 15:34 ` John W. Linville
2007-07-18 22:32 ` David Miller
2007-07-18 22:32 ` David Miller
2007-07-19 0:45 ` John W. Linville
2007-07-19 1:21 ` David Miller
2007-07-12 20:41 John W. Linville
2007-07-12 20:41 ` John W. Linville
2007-07-15 1:59 ` David Miller
2007-07-15 1:59 ` David Miller
2007-07-15 3:41 ` David Miller
2007-07-15 3:41 ` David Miller
2007-07-16 16:37 ` Andy Green
2007-07-16 16:49 ` Jiri Benc
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