diff options
Diffstat (limited to 'net/mac80211/ieee80211.c')
| -rw-r--r-- | net/mac80211/ieee80211.c | 4984 |
1 files changed, 0 insertions, 4984 deletions
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c deleted file mode 100644 index 6e36df67f8d..00000000000 --- a/net/mac80211/ieee80211.c +++ /dev/null @@ -1,4984 +0,0 @@ -/* - * 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) { - 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); - 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); - - 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); -} - - -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); - - /* 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, - ieee80211_rx_h_mgmt, - NULL -}; - -static ieee80211_tx_handler ieee80211_tx_handlers[] = -{ - ieee80211_tx_h_check_assoc, - ieee80211_tx_h_sequence, - ieee80211_tx_h_ps_buf, - ieee80211_tx_h_select_key, - ieee80211_tx_h_michael_mic_add, - ieee80211_tx_h_fragment, - ieee80211_tx_h_tkip_encrypt, - ieee80211_tx_h_ccmp_encrypt, - ieee80211_tx_h_wep_encrypt, - ieee80211_tx_h_rate_ctrl, - ieee80211_tx_h_misc, - ieee80211_tx_h_load_stats, - NULL -}; - - -int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr) -{ - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); - struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); - struct sta_info *sta; - - if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0) - return 0; - - /* Create STA entry for the new peer */ - sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL); - if (!sta) - return -ENOMEM; - sta_info_put(sta); - - /* Remove STA entry for the old peer */ - sta = sta_info_get(local, sdata->u.wds.remote_addr); - if (sta) { - sta_info_put(sta); - sta_info_free(sta, 0); - } else { - printk(KERN_DEBUG "%s: could not find STA entry for WDS link " - "peer " MAC_FMT "\n", - dev->name, MAC_ARG(sdata->u.wds.remote_addr)); - } - - /* Update WDS link data */ - memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN); - - return 0; -} - -/* Must not be called for mdev and apdev */ -void ieee80211_if_setup(struct net_device *dev) -{ - ether_setup(dev); - dev->hard_start_xmit = ieee80211_subif_start_xmit; - dev->wireless_handlers = &ieee80211_iw_handler_def; - dev->set_multicast_list = ieee80211_set_multicast_list; - dev->change_mtu = ieee80211_change_mtu; - dev->get_stats = ieee80211_get_stats; - dev->open = ieee80211_open; - dev->stop = ieee80211_stop; - dev->uninit = ieee80211_if_reinit; - dev->destructor = ieee80211_if_free; -} - -void ieee80211_if_mgmt_setup(struct net_device *dev) -{ - ether_setup(dev); - dev->hard_start_xmit = ieee80211_mgmt_start_xmit; - dev->change_mtu = ieee80211_change_mtu_apdev; - dev->get_stats = ieee80211_get_stats; - dev->open = ieee80211_mgmt_open; - dev->stop = ieee80211_mgmt_stop; - dev->type = ARPHRD_IEEE80211_PRISM; - dev->hard_header_parse = header_parse_80211; - dev->uninit = ieee80211_if_reinit; - dev->destructor = ieee80211_if_free; -} - -int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, - const char *name) -{ - struct rate_control_ref *ref, *old; - - ASSERT_RTNL(); - if (local->open_count || netif_running(local->mdev) || - (local->apdev && netif_running(local->apdev))) - return -EBUSY; - - ref = rate_control_alloc(name, local); - if (!ref) { - printk(KERN_WARNING "%s: Failed to select rate control " - "algorithm\n", local->mdev->name); - return -ENOENT; - } - - old = local->rate_ctrl; - local->rate_ctrl = ref; - if (old) { - rate_control_put(old); - sta_info_flush(local, NULL); - } - - printk(KERN_DEBUG "%s: Selected rate control " - "algorithm '%s'\n", local->mdev->name, - ref->ops->name); - - - return 0; -} - -static void rate_control_deinitialize(struct ieee80211_local *local) -{ - struct rate_control_ref *ref; - - ref = local->rate_ctrl; - local->rate_ctrl = NULL; - rate_control_put(ref); -} - -struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, - const struct ieee80211_ops *ops) -{ - 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"); |