+/*
+ * 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 <net/ieee80211_radiotap.h>
+#include <linux/module.h>
+#include <linux/init.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/rtnetlink.h>
+#include <net/iw_handler.h>
+#include <linux/compiler.h>
+#include <linux/bitmap.h>
+#include <net/cfg80211.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 };
+
+
+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)
+{
+ 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;
+ }
+}
+
+
+static void ieee80211_key_threshold_notify(struct net_device *dev,
+ struct ieee80211_key *key,
+ struct sta_info *sta)
+{
+ 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->local->cts_protect_erp_frames && 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->hw.extra_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->hw.extra_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->local->cts_protect_erp_frames &&
+ !(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;
+
+ 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);
+
+ 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;
+}
+
+
+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 void 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;
+ 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);
+ control->power_level = local->hw.conf.power_level;
+ 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;
+ }
+ 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;
+ 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;
+
+}
+
+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;
+ int ret, i;
+
+ WARN_ON(__ieee80211_queue_pending(local, control->queue));
+
+ if (unlikely(skb->len < 10)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ __ieee80211_tx_prepare(&tx, skb, dev, control);
+ sta = tx.sta;
+ tx.u.tx.mgmt_interface = mgmt;
+ tx.u.tx.mode = local->hw.conf.mode;
+
+ 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;
+ } 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->hw.extra_tx_headroom +
+ IEEE80211_ENCRYPT_HEADROOM;
+ if (skb_headroom(skb) < headroom) {
+ if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
+ dev_kfree_skb(skb);
+ 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;
+}
+
+
+/**
+ * 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).
+ */
+static 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) {
+ if (dls_link_status(local, skb->data) == DLS_STATUS_OK){
+ /* 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);
+ } else {
+ 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->hw.extra_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 = sdata->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
+ */
+static 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->hw.extra_tx_headroom) {
+ if (pskb_expand_head(skb,
+ sdata->local->hw.extra_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;
+}
+
+
+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;
+ }
+ }
+
+ /* 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 */
+ }
+ spin_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->hw.extra_tx_headroom +
+ bh_len + bt_len + 256 /* maximum TIM len */);
+ if (!skb)
+ return NULL;
+
+ skb_reserve(skb, local->hw.extra_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_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);
+
+
+__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);
+
+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);
+
+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;
+
+ 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));
+}
+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);
+
+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;
+
+ 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);
+}
+
+int ieee80211_if_config(struct net_device *dev)
+{
+ return __ieee80211_if_config(dev, NULL, NULL);
+}
+
+int ieee80211_if_config_beacon(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);
+}
+
+int ieee80211_hw_config(struct ieee80211_local *local)
+{
+ 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;
+}
+
+
+static int ieee80211_change_mtu(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) {
+ printk(KERN_WARNING "%s: invalid MTU %d\n",
+ dev->name, new_mtu);
+ return -EINVAL;
+ }
+
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+
+static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
+{
+ /* FIX: what would be proper limits for MTU?
+ * This interface uses 802.11 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;
+ }
+
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+ printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+ dev->mtu = 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);
+ del_timer_sync(&sdata->u.sta.admit_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 ||
+ type2 == IEEE80211_IF_TYPE_MNTR ||
+ (type1 == IEEE80211_IF_TYPE_AP &&
+ type2 == IEEE80211_IF_TYPE_WDS) ||
+ (type1 == IEEE80211_IF_TYPE_WDS &&
+ (type2 == IEEE80211_IF_TYPE_WDS ||
+ type2 == IEEE80211_IF_TYPE_AP)) ||
+ (type1 == IEEE80211_IF_TYPE_AP &&
+ type2 == IEEE80211_IF_TYPE_VLAN) ||
+ (type1 == IEEE80211_IF_TYPE_VLAN &&
+ (type2 == IEEE80211_IF_TYPE_AP ||
+ 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)
+{
+ struct ieee80211_if_init_conf conf;
+
+ if (local->open_count && local->open_count == local->monitors &&
+ !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
+ local->ops->remove_interface) {
+ conf.if_id = -1;
+ conf.type = IEEE80211_IF_TYPE_MNTR;
+ conf.mac_addr = NULL;
+ local->ops->remove_interface(local_to_hw(local), &conf);
+ }
+}
+
+/* Check if running monitor interfaces should go to a "hard monitor" mode
+ * and switch them if necessary. */
+static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
+{
+ struct ieee80211_if_init_conf conf;
+
+ if (local->open_count && local->open_count == local->monitors &&
+ !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
+ local->ops->add_interface) {
+ conf.if_id = -1;
+ conf.type = IEEE80211_IF_TYPE_MNTR;
+ conf.mac_addr = NULL;
+ local->ops->add_interface(local_to_hw(local), &conf);
+ }
+}
+
+static int ieee80211_open(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata, *nsdata;
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+ struct ieee80211_if_init_conf conf;
+ int res;
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ read_lock(&local->sub_if_lock);
+ list_for_each_entry(nsdata, &local->sub_if_list, list) {
+ struct net_device *ndev = nsdata->dev;
+
+ if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
+ compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
+ !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
+ read_unlock(&local->sub_if_lock);
+ return -ENOTUNIQ;
+ }
+ }
+ read_unlock(&local->sub_if_lock);
+
+ if (sdata->type == IEEE80211_IF_TYPE_WDS &&
+ is_zero_ether_addr(sdata->u.wds.remote_addr))
+ return -ENOLINK;
+
+ if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
+ !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
+ /* run the interface in a "soft monitor" mode */
+ local->monitors++;
+ local->open_count++;
+ local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
+ return 0;
+ }
+ ieee80211_start_soft_monitor(local);
+
+ if (local->ops->add_interface) {
+ conf.if_id = dev->ifindex;
+ conf.type = sdata->type;
+ 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)
+ ieee80211_start_hard_monitor(local);
+ return res;
+ }
+ } else {
+ if (sdata->type != IEEE80211_IF_TYPE_STA)
+ return -EOPNOTSUPP;
+ if (local->open_count > 0)
+ return -ENOBUFS;
+ }
+
+ if (local->open_count == 0) {
+ res = 0;
+ tasklet_enable(&local->tx_pending_tasklet);
+ tasklet_enable(&local->tasklet);
+ if (local->ops->open)
+ res = local->ops->open(local_to_hw(local));
+ if (res == 0) {
+ res = dev_open(local->mdev);
+ if (res) {
+ if (local->ops->stop)
+ local->ops->stop(local_to_hw(local));
+ } else {
+ res = ieee80211_hw_config(local);
+ if (res && local->ops->stop)
+ local->ops->stop(local_to_hw(local));
+ else if (!res && local->apdev)
+ dev_open(local->apdev);
+ }
+ }
+ if (res) {
+ if (local->ops->remove_interface)
+ local->ops->remove_interface(local_to_hw(local),
+ &conf);
+ return res;
+ }
+ }
+ local->open_count++;
+
+ if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
+ local->monitors++;
+ local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
+ } else
+ ieee80211_if_config(dev);
+
+ if (sdata->type == IEEE80211_IF_TYPE_STA &&
+ !local->user_space_mlme)
+ netif_carrier_off(dev);
+ else
+ netif_carrier_on(dev);
+
+ netif_start_queue(dev);
+ return 0;
+}
+
+
+static int ieee80211_stop(struct net_device *dev)
+{
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
+ local->open_count > 1 &&
+ !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
+ /* remove "soft monitor" interface */
+ local->open_count--;
+ local->monitors--;
+ if (!local->monitors)
+ local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
+ return 0;
+ }
+
+ netif_stop_queue(dev);
+ ieee80211_if_shutdown(dev);
+
+ if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
+ local->monitors--;
+ if (!local->monitors)
+ local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
+ }
+
+ local->open_count--;
+ if (local->open_count == 0) {
+ if (netif_running(local->mdev))
+ dev_close(local->mdev);
+ if (local->apdev)
+ dev_close(local->apdev);
+ if (local->ops->stop)
+ local->ops->stop(local_to_hw(local));
+ tasklet_disable(&local->tx_pending_tasklet);
+ tasklet_disable(&local->tasklet);
+ }
+ if (local->ops->remove_interface) {
+ struct ieee80211_if_init_conf conf;
+
+ conf.if_id = dev->ifindex;
+ conf.type = sdata->type;
+ conf.mac_addr = dev->dev_addr;
+ local->ops->remove_interface(local_to_hw(local), &conf);
+ }
+
+ ieee80211_start_hard_monitor(local);
+
+ return 0;
+}
+
+
+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)
+{
+ return compare_ether_addr(raddr, addr) == 0 ||
+ is_broadcast_ether_addr(raddr);
+}
+
+
+inline static unsigned int calc_pad_len(unsigned int len)
+{
+ return ((4 - len) & 0x3);
+}
+
+static ieee80211_txrx_result
+ieee80211_rx_h_data_agg(struct ieee80211_txrx_data *rx)
+{
+ struct net_device *dev = rx->dev;
+ struct ieee80211_local *local = rx->local;
+ u16 fc, hdrlen, ethertype;
+ u8 *payload;
+ struct sk_buff *skb = rx->skb, *skb2, *frame;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ const struct ethhdr* eth;
+ int remaining;
+
+ 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;
+
+ if (!rx->u.rx.is_agg_frame)
+ return TXRX_CONTINUE;
+
+ hdrlen = ieee80211_get_hdrlen(fc);
+
+ 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 */
+ eth = (struct ethhdr*) (skb->data + hdrlen + 6);
+ remaining = skb->len - (hdrlen + 6);
+ } else {
+ eth = (struct ethhdr*) (skb->data + hdrlen);
+ remaining = skb->len - hdrlen;
+ }
+
+ while ((u8*)eth < skb->data + skb->len) {
+ u8 padding;
+ unsigned int subframe_len = sizeof(struct ethhdr) +
+ ntohs(eth->h_proto);
+
+ padding = calc_pad_len(subframe_len);
+ /* the last MSDU has no padding */
+ if (subframe_len > remaining)
+ return TXRX_DROP;
+
+ frame = dev_alloc_skb(local->hw.extra_tx_headroom +
+ subframe_len);
+
+ if (frame == NULL)
+ return TXRX_DROP;
+
+ memcpy(skb_put(frame, subframe_len), (u8*)eth, subframe_len);
+ skb_set_mac_header(frame, 0);
+ skb2 = NULL;
+
+ sdata->stats.rx_packets++;
+ sdata->stats.rx_bytes += frame->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(frame->data)) {
+ /* send multicast frames both to higher layers
+ * in local net stack and back to the wireless
+ * media */
+ skb2 = skb_copy(frame, 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, frame->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 = frame;
+ frame = NULL;
+ }
+ if (dsta)
+ sta_info_put(dsta);
+ }
+ }
+ if (frame) {
+ /* deliver to local stack */
+ frame->protocol = eth_type_trans(frame, dev);
+ frame->priority = skb->priority;
+ frame->dev = dev;
+ netif_rx(frame);
+ }
+
+ 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);
+ skb2->priority = skb->priority;
+ skb2->dev = dev;
+ dev_queue_xmit(skb2);
+ }
+
+ eth = (struct ethhdr*)((u8*)eth + subframe_len + padding);
+
+ remaining -= (subframe_len + padding);
+ }
+
+ dev_kfree_skb(skb);
+ return TXRX_QUEUED;
+}
+
+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 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;
+}
+
+static void
+ieee80211_fill_frame_info(struct ieee80211_local *local,
+ struct ieee80211_frame_info *fi,
+ struct ieee80211_rx_status *status)
+{
+ 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));
+}
+
+/* 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;
+
+ 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)
+{
+ 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);
+
+ if (!local->apdev)
+ return 0;
+
+ skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
+ sizeof(struct ieee80211_radar_info));
+
+ if (!skb)
+ 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);
+
+int ieee80211_set_aid_for_sta(struct ieee80211_hw *hw, u8 *peer_address,
+ u16 aid)
+{
+ struct sk_buff *skb;
+ struct ieee80211_msg_set_aid_for_sta *msg;
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ /* unlikely because if this event only happens for APs,
+ * which require an open ap device. */
+ if (unlikely(!local->apdev))
+ return 0;
+
+ skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
+ sizeof(struct ieee80211_msg_set_aid_for_sta));
+
+ if (!skb)
+ return -ENOMEM;
+ skb_reserve(skb, sizeof(struct ieee80211_frame_info));
+
+ msg = (struct ieee80211_msg_set_aid_for_sta *)
+ skb_put(skb, sizeof(struct ieee80211_msg_set_aid_for_sta));
+ memcpy(msg->sta_address, peer_address, ETH_ALEN);
+ msg->aid = aid;
+
+ ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_set_aid_for_sta);
+ return 0;
+}
+EXPORT_SYMBOL(ieee80211_set_aid_for_sta);
+
+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;
+
+ 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 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 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_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 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 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;
+}
+
+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);
+ 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;
+}
+
+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);
+}
+
+/*
+ * 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 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;
+
+ 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;
+ 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;
+}
+
+static void ieee80211_stat_refresh(unsigned long data)
+{
+ struct ieee80211_local *local = (struct ieee80211_local *) data;
+ struct sta_info *sta;
+ struct ieee80211_sub_if_data *sdata;
+
+ if (!local->stat_time)
+ return;
+
+ /* go through all stations */
+ spin_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);
+
+ /* go through all subinterfaces */
+ read_lock(&local->sub_if_lock);
+ list_for_each_entry(sdata, &local->sub_if_list, list) {
+ sdata->channel_use = (sdata->channel_use_raw /
+ local->stat_time) / CHAN_UTIL_PER_10MS;
+ sdata->channel_use_raw = 0;
+ }
+ read_unlock(&local->sub_if_lock);
+
+ /* hardware interface */
+ local->channel_use = (local->channel_use_raw /
+ local->stat_time) / CHAN_UTIL_PER_10MS;
+ local->channel_use_raw = 0;
+
+ local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
+ 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)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_tx_status *saved;
+ int tmp;
+
+ skb->dev = local->mdev;
+ saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
+ if (unlikely(!saved)) {
+ if (net_ratelimit())
+ printk(KERN_WARNING "%s: Not enough memory, "
+ "dropping tx status", skb->dev->name);
+ /* should be dev_kfree_skb_irq, but due to this function being
+ * named _irqsafe instead of just _irq we can't be sure that
+ * people won't call it from non-irq contexts */
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ memcpy(saved, status, sizeof(struct ieee80211_tx_status));
+ /* copy pointer to saved status into skb->cb for use by tasklet */
+ memcpy(skb->cb, &saved, sizeof(saved));
+
+ skb->pkt_type = IEEE80211_TX_STATUS_MSG;
+ skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
+ &local->skb_queue : &local->skb_queue_unreliable, skb);
+ tmp = skb_queue_len(&local->skb_queue) +
+ skb_queue_len(&local->skb_queue_unreliable);
+ while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
+ (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+ memcpy(&saved, skb->cb, sizeof(saved));
+ kfree(saved);
+ dev_kfree_skb_irq(skb);
+ tmp--;
+ I802_DEBUG_INC(local->tx_status_drop);
+ }
+ tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
+
+static void ieee80211_tasklet_handler(unsigned long data)
+{
+ struct ieee80211_local *local = (struct ieee80211_local *) data;
+ struct sk_buff *skb;
+ struct ieee80211_rx_status rx_status;
+ struct ieee80211_tx_status *tx_status;
+
+ while ((skb = skb_dequeue(&local->skb_queue)) ||
+ (skb = skb_dequeue(&local->skb_queue_unreliable))) {
+ switch (skb->pkt_type) {
+ case IEEE80211_RX_MSG:
+ /* status is in skb->cb */
+ memcpy(&rx_status, skb->cb, sizeof(rx_status));
+ /* Clear skb->type in order to not confuse kernel
+ * netstack. */
+ skb->pkt_type = 0;
+ __ieee80211_rx(local_to_hw(local), skb, &rx_status);
+ break;
+ case IEEE80211_TX_STATUS_MSG:
+ /* get pointer to saved status out of skb->cb */
+ memcpy(&tx_status, skb->cb, sizeof(tx_status));
+ skb->pkt_type = 0;
+ ieee80211_tx_status(local_to_hw(local),
+ skb, tx_status);
+ kfree(tx_status);
+ break;
+ default: /* should never get here! */
+ printk(KERN_ERR "%s: Unknown message type (%d)\n",
+ local->mdev->name, skb->pkt_type);
+ dev_kfree_skb(skb);
+ break;
+ }
+ }
+}
+
+
+/* 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.
+ * Also, tx_packet_data in cb is restored from tx_control. */
+static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
+ struct ieee80211_key *key,
+ struct sk_buff *skb,
+ struct ieee80211_tx_control *control)
+{
+ int hdrlen, iv_len, mic_len;
+ struct ieee80211_tx_packet_data *pkt_data;
+
+ pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
+ pkt_data->ifindex = control->ifindex;
+ pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
+ pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
+ pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
+ pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
+ pkt_data->queue = control->queue;
+
+ hdrlen = ieee80211_get_hdrlen_from_skb(skb);
+
+ if (!key)
+ goto no_key;
+
+ switch (key->alg) {
+ case ALG_WEP:
+ iv_len = WEP_IV_LEN;
+ mic_len = WEP_ICV_LEN;
+ break;
+ case ALG_TKIP:
+ iv_len = TKIP_IV_LEN;
+ mic_len = TKIP_ICV_LEN;
+ break;
+ case ALG_CCMP:
+ iv_len = CCMP_HDR_LEN;
+ mic_len = CCMP_MIC_LEN;
+ break;
+ default:
+ goto no_key;
+ }
+
+ if (skb->len >= mic_len && key->force_sw_encrypt)
+ skb_trim(skb, skb->len - mic_len);
+ if (skb->len >= iv_len && skb->len > hdrlen) {
+ memmove(skb->data + iv_len, skb->data, hdrlen);
+ skb_pull(skb, iv_len);
+ }
+
+no_key:
+ {
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ u16 fc = le16_to_cpu(hdr->frame_control);
+ if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
+ fc &= ~IEEE80211_STYPE_QOS_DATA;
+ hdr->frame_control = cpu_to_le16(fc);
+ memmove(skb->data + 2, skb->data, hdrlen - 2);
+ skb_pull(skb, 2);
+ }
+ }
+}
+
+
+void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
+ struct ieee80211_tx_status *status)
+{
+ struct sk_buff *skb2;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_local *local = hw_to_local(hw);
+ u16 frag, type;
+ u32 msg_type;
+
+ if (!status) {
+ printk(KERN_ERR
+ "%s: ieee80211_tx_status called with NULL status\n",
+ local->mdev->name);
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ if (status->excessive_retries) {
+ struct sta_info *sta;
+ sta = sta_info_get(local, hdr->addr1);
+ if (sta) {
+ if (sta->flags & WLAN_STA_PS) {
+ /* The STA is in power save mode, so assume
+ * that this TX packet failed because of that.
+ */
+ status->excessive_retries = 0;
+ status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
+ }
+ sta_info_put(sta);
+ }
+ }
+
+ if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
+ struct sta_info *sta;
+ sta = sta_info_get(local, hdr->addr1);
+ if (sta) {
+ sta->tx_filtered_count++;
+
+ /* Clear the TX filter mask for this STA when sending
+ * the next packet. If the STA went to power save mode,
+ * this will happen when it is waking up for the next
+ * time. */
+ sta->clear_dst_mask = 1;
+
+ /* TODO: Is the WLAN_STA_PS flag always set here or is
+ * the race between RX and TX status causing some
+ * packets to be filtered out before 80211.o gets an
+ * update for PS status? This seems to be the case, so
+ * no changes are likely to be needed. */
+ if (sta->flags & WLAN_STA_PS &&
+ skb_queue_len(&sta->tx_filtered) <
+ STA_MAX_TX_BUFFER) {
+ ieee80211_remove_tx_extra(local, sta->key,
+ skb,
+ &status->control);
+ skb_queue_tail(&sta->tx_filtered, skb);
+ } else if (!(sta->flags & WLAN_STA_PS) &&
+ !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
+ /* Software retry the packet once */
+ status->control.flags |= IEEE80211_TXCTL_REQUEUE;
+ ieee80211_remove_tx_extra(local, sta->key,
+ skb,
+ &status->control);
+ dev_queue_xmit(skb);
+ } else {
+ if (net_ratelimit()) {
+ printk(KERN_DEBUG "%s: dropped TX "
+ "filtered frame queue_len=%d "
+ "PS=%d @%lu\n",
+ local->mdev->name,
+ skb_queue_len(
+ &sta->tx_filtered),
+ !!(sta->flags & WLAN_STA_PS),
+ jiffies);
+ }
+ dev_kfree_skb(skb);
+ }
+ sta_info_put(sta);
+ return;
+ }
+ } else {
+ /* FIXME: STUPID to call this with both local and local->mdev */
+ rate_control_tx_status(local, local->mdev, skb, status);
+ }
+
+ ieee80211_led_tx(local, 0);
+
+ /* SNMP counters
+ * Fragments are passed to low-level drivers as separate skbs, so these
+ * are actually fragments, not frames. Update frame counters only for
+ * the first fragment of the frame. */
+
+ frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
+ type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
+
+ if (status->flags & IEEE80211_TX_STATUS_ACK) {
+ if (frag == 0) {
+ local->dot11TransmittedFrameCount++;
+ if (is_multicast_ether_addr(hdr->addr1))
+ local->dot11MulticastTransmittedFrameCount++;
+ if (status->retry_count > 0)
+ local->dot11RetryCount++;
+ if (status->retry_count > 1)
+ local->dot11MultipleRetryCount++;
+ }
+
+ /* This counter shall be incremented for an acknowledged MPDU
+ * with an individual address in the address 1 field or an MPDU
+ * with a multicast address in the address 1 field of type Data
+ * or Management. */
+ if (!is_multicast_ether_addr(hdr->addr1) ||
+ type == IEEE80211_FTYPE_DATA ||
+ type == IEEE80211_FTYPE_MGMT)
+ local->dot11TransmittedFragmentCount++;
+ } else {
+ if (frag == 0)
+ local->dot11FailedCount++;
+ }
+
+ if (!(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS)
+ || unlikely(!local->apdev)) {
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
+ ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
+
+ /* skb was the original skb used for TX. Clone it and give the clone
+ * to netif_rx(). Free original skb. */
+ skb2 = skb_copy(skb, GFP_ATOMIC);
+ if (!skb2) {
+ dev_kfree_skb(skb);
+ return;
+ }
+ dev_kfree_skb(skb);
+ skb = skb2;
+
+ /* Send frame to hostapd */
+ ieee80211_rx_mgmt(local, skb, NULL, msg_type);
+}
+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_agg,
+ 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->do_ioctl = ieee80211_ioctl;
+ 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)
+{
+ struct net_device *mdev;
+ struct ieee80211_local *local;
+ struct ieee80211_sub_if_data *sdata;
+ int priv_size;
+ struct wiphy *wiphy;
+
+ /* Ensure 32-byte alignment of our private data and hw private data.
+ * We use the wiphy priv data for both our ieee80211_local and for
+ * the driver's private data
+ *
+ * In memory it'll be like this:
+ *
+ * +-------------------------+
+ * | struct wiphy |
+ * +-------------------------+
+ * | struct ieee80211_local |
+ * +-------------------------+
+ * | driver's private data |
+ * +-------------------------+
+ *
+ */
+ priv_size = ((sizeof(struct ieee80211_local) +
+ NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
+ priv_data_len;
+
+ wiphy = wiphy_new(&mac80211_config_ops, priv_size);
+
+ if (!wiphy)
+ return NULL;
+
+ wiphy->privid = mac80211_wiphy_privid;
+
+ local = wiphy_priv(wiphy);
+ local->hw.wiphy = wiphy;
+
+ local->hw.priv = (char *)local +
+ ((sizeof(struct ieee80211_local) +
+ NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
+
+ local->ops = ops;
+
+ /* for now, mdev needs sub_if_data :/ */
+ mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
+ "wmaster%d", ether_setup);
+ if (!mdev) {
+ wiphy_free(wiphy);
+ return NULL;
+ }
+
+ sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
+ mdev->ieee80211_ptr = &sdata->wdev;
+ sdata->wdev.wiphy = wiphy;
+
+ local->hw.queues = 1; /* default */
+
+ local->mdev = mdev;
+ local->rx_pre_handlers = ieee80211_rx_pre_handlers;
+ local->rx_handlers = ieee80211_rx_handlers;
+ local->tx_handlers = ieee80211_tx_handlers;
+
+ local->bridge_packets = 1;
+
+ local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
+ local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
+ local->short_retry_limit = 7;
+ local->long_retry_limit = 4;
+ local->hw.conf.radio_enabled = 1;
+ local->rate_ctrl_num_up = RATE_CONTROL_NUM_UP;
+ local->rate_ctrl_num_down = RATE_CONTROL_NUM_DOWN;
+
+ local->enabled_modes = (unsigned int) -1;
+
+ INIT_LIST_HEAD(&local->modes_list);
+
+ rwlock_init(&local->sub_if_lock);
+ INIT_LIST_HEAD(&local->sub_if_list);
+
+ INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
+ init_timer(&local->stat_timer);
+ local->stat_timer.function = ieee80211_stat_refresh;
+ local->stat_timer.data = (unsigned long) local;
+ ieee80211_rx_bss_list_init(mdev);
+
+ sta_info_init(local);
+
+ mdev->hard_start_xmit = ieee80211_master_start_xmit;
+ mdev->open = ieee80211_master_open;
+ mdev->stop = ieee80211_master_stop;
+ mdev->type = ARPHRD_IEEE80211;
+ mdev->hard_header_parse = header_parse_80211;
+
+ sdata->type = IEEE80211_IF_TYPE_AP;
+ sdata->dev = mdev;
+ sdata->local = local;
+ sdata->u.ap.force_unicast_rateidx = -1;
+ sdata->u.ap.max_ratectrl_rateidx = -1;
+ ieee80211_if_sdata_init(sdata);
+ list_add_tail(&sdata->list, &local->sub_if_list);
+
+ tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
+ (unsigned long)local);
+ tasklet_disable(&local->tx_pending_tasklet);
+
+ tasklet_init(&local->tasklet,
+ ieee80211_tasklet_handler,
+ (unsigned long) local);
+ tasklet_disable(&local->tasklet);
+
+ skb_queue_head_init(&local->skb_queue);
+ skb_queue_head_init(&local->skb_queue_unreliable);
+
+ return local_to_hw(local);
+}
+EXPORT_SYMBOL(ieee80211_alloc_hw);
+
+int ieee80211_register_hw(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ const char *name;
+ int result;
+
+ result = wiphy_register(local->hw.wiphy);
+ if (result < 0)
+ return result;
+
+ name = wiphy_dev(local->hw.wiphy)->driver->name;
+ local->hw.workqueue = create_singlethread_workqueue(name);
+ if (!local->hw.workqueue) {
+ result = -ENOMEM;
+ goto fail_workqueue;
+ }
+
+ debugfs_hw_add(local);
+
+ local->hw.conf.beacon_int = 1000;
+
+ local->wstats_flags |= local->hw.max_rssi ?
+ IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
+ local->wstats_flags |= local->hw.max_signal ?
+ IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
+ local->wstats_flags |= local->hw.max_noise ?
+ IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
+ if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
+ local->wstats_flags |= IW_QUAL_DBM;
+
+ result = sta_info_start(local);
+ if (result < 0)
+ goto fail_sta_info;
+
+ rtnl_lock();
+ result = dev_alloc_name(local->mdev, local->mdev->name);
+ if (result < 0)
+ goto fail_dev;
+
+ memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
+ SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
+
+ result = register_netdevice(local->mdev);
+ if (result < 0)
+ goto fail_dev;
+
+ ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
+
+ result = ieee80211_init_rate_ctrl_alg(local, NULL);
+ if (result < 0) {
+ printk(KERN_DEBUG "%s: Failed to initialize rate control "
+ "algorithm\n", local->mdev->name);
+ goto fail_rate;
+ }
+
+ result = ieee80211_wep_init(local);
+
+ if (result < 0) {
+ printk(KERN_DEBUG "%s: Failed to initialize wep\n",
+ local->mdev->name);
+ goto fail_wep;
+ }
+
+ ieee80211_install_qdisc(local->mdev);
+
+ /* add one default STA interface */
+ result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
+ IEEE80211_IF_TYPE_STA);
+ if (result)
+ printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
+ local->mdev->name);
+
+ local->reg_state = IEEE80211_DEV_REGISTERED;
+ rtnl_unlock();
+
+ ieee80211_led_init(local);
+
+ return 0;
+
+fail_wep:
+ rate_control_deinitialize(local);
+fail_rate:
+ ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
+ unregister_netdevice(local->mdev);
+fail_dev:
+ rtnl_unlock();
+ sta_info_stop(local);
+fail_sta_info:
+ debugfs_hw_del(local);
+ destroy_workqueue(local->hw.workqueue);
+fail_workqueue:
+ wiphy_unregister(local->hw.wiphy);
+ return result;
+}
+EXPORT_SYMBOL(ieee80211_register_hw);
+
+int ieee80211_register_hwmode(struct ieee80211_hw *hw,
+ struct ieee80211_hw_mode *mode)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_rate *rate;
+ int i;
+
+ INIT_LIST_HEAD(&mode->list);
+ list_add_tail(&mode->list, &local->modes_list);
+
+ local->hw_modes |= (1 << mode->mode);
+ for (i = 0; i < mode->num_rates; i++) {
+ rate = &(mode->rates[i]);
+ rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
+ }
+ ieee80211_prepare_rates(local, mode);
+
+ if (!local->oper_hw_mode) {
+ /* Default to this mode */
+ local->hw.conf.phymode = mode->mode;
+ local->oper_hw_mode = local->scan_hw_mode = mode;
+ local->oper_channel = local->scan_channel = &mode->channels[0];
+ local->hw.conf.mode = local->oper_hw_mode;
+ local->hw.conf.chan = local->oper_channel;
+ }
+
+ if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
+ ieee80211_init_client(local->mdev);
+
+ return 0;
+}
+EXPORT_SYMBOL(ieee80211_register_hwmode);
+
+void ieee80211_unregister_hw(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_sub_if_data *sdata, *tmp;
+ struct list_head tmp_list;
+ int i;
+
+ tasklet_kill(&local->tx_pending_tasklet);
+ tasklet_kill(&local->tasklet);
+
+ rtnl_lock();
+
+ BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
+
+ local->reg_state = IEEE80211_DEV_UNREGISTERED;
+ if (local->apdev)
+ ieee80211_if_del_mgmt(local);
+
+ write_lock_bh(&local->sub_if_lock);
+ list_replace_init(&local->sub_if_list, &tmp_list);
+ write_unlock_bh(&local->sub_if_lock);
+
+ list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
+ __ieee80211_if_del(local, sdata);
+
+ rtnl_unlock();
+
+ if (local->stat_time)
+ del_timer_sync(&local->stat_timer);
+
+ ieee80211_rx_bss_list_deinit(local->mdev);
+ ieee80211_clear_tx_pending(local);
+ sta_info_stop(local);
+ rate_control_deinitialize(local);
+ debugfs_hw_del(local);
+
+ for (i = 0; i < NUM_IEEE80211_MODES; i++) {
+ kfree(local->supp_rates[i]);
+ kfree(local->basic_rates[i]);
+ }
+
+ if (skb_queue_len(&local->skb_queue)
+ || skb_queue_len(&local->skb_queue_unreliable))
+ printk(KERN_WARNING "%s: skb_queue not empty\n",
+ local->mdev->name);
+ skb_queue_purge(&local->skb_queue);
+ skb_queue_purge(&local->skb_queue_unreliable);
+
+ destroy_workqueue(local->hw.workqueue);
+ wiphy_unregister(local->hw.wiphy);
+ ieee80211_wep_free(local);
+ ieee80211_led_exit(local);
+}
+EXPORT_SYMBOL(ieee80211_unregister_hw);
+
+void ieee80211_free_hw(struct ieee80211_hw *hw)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+
+ ieee80211_if_free(local->mdev);
+ wiphy_free(local->hw.wiphy);
+}
+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;
+ sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ return &sdata->stats;
+}
+
+static int __init ieee80211_init(void)
+{
+ struct sk_buff *skb;
+ int ret;
+
+ BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
+
+ ret = ieee80211_wme_register();
+ if (ret) {
+ printk(KERN_DEBUG "ieee80211_init: failed to "
+ "initialize WME (err=%d)\n", ret);
+ return ret;
+ }
+
+ ieee80211_debugfs_netdev_init();
+
+ return 0;
+}
+
+
+static void __exit ieee80211_exit(void)
+{
+ ieee80211_wme_unregister();
+ ieee80211_debugfs_netdev_exit();
+}
+
+
+module_init(ieee80211_init);
+module_exit(ieee80211_exit);
+
+MODULE_DESCRIPTION("IEEE 802.11 subsystem");
+MODULE_LICENSE("GPL");
projects / openwrt / svn-archive / archive.git / commitdiff