| /* |
| * Copyright 2002-2005, Instant802 Networks, Inc. |
| * Copyright 2005-2006, Devicescape Software, Inc. |
| * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * utilities for mac80211 |
| */ |
| |
| #include <net/mac80211.h> |
| #include <linux/netdevice.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/skbuff.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_arp.h> |
| #include <linux/wireless.h> |
| #include <linux/bitmap.h> |
| #include <linux/crc32.h> |
| #include <net/net_namespace.h> |
| #include <net/cfg80211.h> |
| #include <net/rtnetlink.h> |
| |
| #include "ieee80211_i.h" |
| #include "driver-ops.h" |
| #include "rate.h" |
| #include "mesh.h" |
| #include "wme.h" |
| #include "led.h" |
| |
| /* privid for wiphys to determine whether they belong to us or not */ |
| void *mac80211_wiphy_privid = &mac80211_wiphy_privid; |
| |
| /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
| /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
| const unsigned char rfc1042_header[] __aligned(2) = |
| { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
| |
| /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| const unsigned char bridge_tunnel_header[] __aligned(2) = |
| { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
| |
| struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
| { |
| struct ieee80211_local *local; |
| BUG_ON(!wiphy); |
| |
| local = wiphy_priv(wiphy); |
| return &local->hw; |
| } |
| EXPORT_SYMBOL(wiphy_to_ieee80211_hw); |
| |
| u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
| enum nl80211_iftype type) |
| { |
| __le16 fc = hdr->frame_control; |
| |
| /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
| if (len < 16) |
| return NULL; |
| |
| if (ieee80211_is_data(fc)) { |
| if (len < 24) /* drop incorrect hdr len (data) */ |
| return NULL; |
| |
| if (ieee80211_has_a4(fc)) |
| return NULL; |
| if (ieee80211_has_tods(fc)) |
| return hdr->addr1; |
| if (ieee80211_has_fromds(fc)) |
| return hdr->addr2; |
| |
| return hdr->addr3; |
| } |
| |
| if (ieee80211_is_mgmt(fc)) { |
| if (len < 24) /* drop incorrect hdr len (mgmt) */ |
| return NULL; |
| return hdr->addr3; |
| } |
| |
| if (ieee80211_is_ctl(fc)) { |
| if(ieee80211_is_pspoll(fc)) |
| return hdr->addr1; |
| |
| if (ieee80211_is_back_req(fc)) { |
| switch (type) { |
| case NL80211_IFTYPE_STATION: |
| return hdr->addr2; |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_AP_VLAN: |
| return hdr->addr1; |
| default: |
| break; /* fall through to the return */ |
| } |
| } |
| } |
| |
| return NULL; |
| } |
| |
| unsigned int ieee80211_hdrlen(__le16 fc) |
| { |
| unsigned int hdrlen = 24; |
| |
| if (ieee80211_is_data(fc)) { |
| if (ieee80211_has_a4(fc)) |
| hdrlen = 30; |
| if (ieee80211_is_data_qos(fc)) |
| hdrlen += IEEE80211_QOS_CTL_LEN; |
| goto out; |
| } |
| |
| if (ieee80211_is_ctl(fc)) { |
| /* |
| * ACK and CTS are 10 bytes, all others 16. To see how |
| * to get this condition consider |
| * subtype mask: 0b0000000011110000 (0x00F0) |
| * ACK subtype: 0b0000000011010000 (0x00D0) |
| * CTS subtype: 0b0000000011000000 (0x00C0) |
| * bits that matter: ^^^ (0x00E0) |
| * value of those: 0b0000000011000000 (0x00C0) |
| */ |
| if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) |
| hdrlen = 10; |
| else |
| hdrlen = 16; |
| } |
| out: |
| return hdrlen; |
| } |
| EXPORT_SYMBOL(ieee80211_hdrlen); |
| |
| unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
| { |
| const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data; |
| unsigned int hdrlen; |
| |
| if (unlikely(skb->len < 10)) |
| return 0; |
| hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| if (unlikely(hdrlen > skb->len)) |
| return 0; |
| return hdrlen; |
| } |
| EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); |
| |
| int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
| { |
| int ae = meshhdr->flags & IEEE80211S_FLAGS_AE; |
| /* 7.1.3.5a.2 */ |
| switch (ae) { |
| case 0: |
| return 6; |
| case 1: |
| return 12; |
| case 2: |
| return 18; |
| case 3: |
| return 24; |
| default: |
| return 6; |
| } |
| } |
| |
| void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
| { |
| struct sk_buff *skb = tx->skb; |
| struct ieee80211_hdr *hdr; |
| |
| do { |
| hdr = (struct ieee80211_hdr *) skb->data; |
| hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| } while ((skb = skb->next)); |
| } |
| |
| 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.channel->band == IEEE80211_BAND_5GHZ || erp) { |
| /* |
| * 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 |
| */ |
| 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, |
| struct ieee80211_vif *vif, |
| size_t frame_len, |
| struct ieee80211_rate *rate) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| u16 dur; |
| int erp; |
| bool short_preamble = false; |
| |
| erp = 0; |
| if (vif) { |
| sdata = vif_to_sdata(vif); |
| short_preamble = sdata->vif.bss_conf.use_short_preamble; |
| if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| erp = rate->flags & IEEE80211_RATE_ERP_G; |
| } |
| |
| dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, |
| short_preamble); |
| |
| return cpu_to_le16(dur); |
| } |
| EXPORT_SYMBOL(ieee80211_generic_frame_duration); |
| |
| __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_rate *rate; |
| struct ieee80211_sub_if_data *sdata; |
| bool short_preamble; |
| int erp; |
| u16 dur; |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| short_preamble = false; |
| |
| rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
| |
| erp = 0; |
| if (vif) { |
| sdata = vif_to_sdata(vif); |
| short_preamble = sdata->vif.bss_conf.use_short_preamble; |
| if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| erp = rate->flags & IEEE80211_RATE_ERP_G; |
| } |
| |
| /* CTS duration */ |
| dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
| erp, short_preamble); |
| /* Data frame duration */ |
| dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
| erp, short_preamble); |
| /* ACK duration */ |
| dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
| erp, short_preamble); |
| |
| return cpu_to_le16(dur); |
| } |
| EXPORT_SYMBOL(ieee80211_rts_duration); |
| |
| __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_rate *rate; |
| struct ieee80211_sub_if_data *sdata; |
| bool short_preamble; |
| int erp; |
| u16 dur; |
| struct ieee80211_supported_band *sband; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| short_preamble = false; |
| |
| rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
| erp = 0; |
| if (vif) { |
| sdata = vif_to_sdata(vif); |
| short_preamble = sdata->vif.bss_conf.use_short_preamble; |
| if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| erp = rate->flags & IEEE80211_RATE_ERP_G; |
| } |
| |
| /* Data frame duration */ |
| dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
| erp, short_preamble); |
| if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
| /* ACK duration */ |
| dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
| erp, short_preamble); |
| } |
| |
| return cpu_to_le16(dur); |
| } |
| EXPORT_SYMBOL(ieee80211_ctstoself_duration); |
| |
| static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| if (WARN_ON(queue >= hw->queues)) |
| return; |
| |
| __clear_bit(reason, &local->queue_stop_reasons[queue]); |
| |
| if (!skb_queue_empty(&local->pending[queue]) && |
| local->queue_stop_reasons[queue] == |
| BIT(IEEE80211_QUEUE_STOP_REASON_PENDING)) |
| tasklet_schedule(&local->tx_pending_tasklet); |
| |
| if (local->queue_stop_reasons[queue] != 0) |
| /* someone still has this queue stopped */ |
| return; |
| |
| netif_wake_subqueue(local->mdev, queue); |
| } |
| |
| void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| __ieee80211_wake_queue(hw, queue, reason); |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) |
| { |
| ieee80211_wake_queue_by_reason(hw, queue, |
| IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_wake_queue); |
| |
| static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| if (WARN_ON(queue >= hw->queues)) |
| return; |
| |
| /* |
| * Only stop if it was previously running, this is necessary |
| * for correct pending packets handling because there we may |
| * start (but not wake) the queue and rely on that. |
| */ |
| if (!local->queue_stop_reasons[queue]) |
| netif_stop_subqueue(local->mdev, queue); |
| |
| __set_bit(reason, &local->queue_stop_reasons[queue]); |
| } |
| |
| void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| __ieee80211_stop_queue(hw, queue, reason); |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) |
| { |
| ieee80211_stop_queue_by_reason(hw, queue, |
| IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_stop_queue); |
| |
| void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| |
| for (i = 0; i < hw->queues; i++) |
| __ieee80211_stop_queue(hw, i, reason); |
| |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_stop_queues(struct ieee80211_hw *hw) |
| { |
| ieee80211_stop_queues_by_reason(hw, |
| IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_stop_queues); |
| |
| int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| if (WARN_ON(queue >= hw->queues)) |
| return true; |
| |
| return __netif_subqueue_stopped(local->mdev, queue); |
| } |
| EXPORT_SYMBOL(ieee80211_queue_stopped); |
| |
| void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
| enum queue_stop_reason reason) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| |
| for (i = 0; i < hw->queues; i++) |
| __ieee80211_wake_queue(hw, i, reason); |
| |
| spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| } |
| |
| void ieee80211_wake_queues(struct ieee80211_hw *hw) |
| { |
| ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| } |
| EXPORT_SYMBOL(ieee80211_wake_queues); |
| |
| void ieee80211_iterate_active_interfaces( |
| struct ieee80211_hw *hw, |
| void (*iterator)(void *data, u8 *mac, |
| struct ieee80211_vif *vif), |
| void *data) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| |
| mutex_lock(&local->iflist_mtx); |
| |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| switch (sdata->vif.type) { |
| case __NL80211_IFTYPE_AFTER_LAST: |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case NL80211_IFTYPE_MONITOR: |
| case NL80211_IFTYPE_AP_VLAN: |
| continue; |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_ADHOC: |
| case NL80211_IFTYPE_WDS: |
| case NL80211_IFTYPE_MESH_POINT: |
| break; |
| } |
| if (netif_running(sdata->dev)) |
| iterator(data, sdata->dev->dev_addr, |
| &sdata->vif); |
| } |
| |
| mutex_unlock(&local->iflist_mtx); |
| } |
| EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); |
| |
| void ieee80211_iterate_active_interfaces_atomic( |
| struct ieee80211_hw *hw, |
| void (*iterator)(void *data, u8 *mac, |
| struct ieee80211_vif *vif), |
| void *data) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_sub_if_data *sdata; |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| switch (sdata->vif.type) { |
| case __NL80211_IFTYPE_AFTER_LAST: |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case NL80211_IFTYPE_MONITOR: |
| case NL80211_IFTYPE_AP_VLAN: |
| continue; |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_ADHOC: |
| case NL80211_IFTYPE_WDS: |
| case NL80211_IFTYPE_MESH_POINT: |
| break; |
| } |
| if (netif_running(sdata->dev)) |
| iterator(data, sdata->dev->dev_addr, |
| &sdata->vif); |
| } |
| |
| rcu_read_unlock(); |
| } |
| EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
| |
| void ieee802_11_parse_elems(u8 *start, size_t len, |
| struct ieee802_11_elems *elems) |
| { |
| ieee802_11_parse_elems_crc(start, len, elems, 0, 0); |
| } |
| |
| u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, |
| struct ieee802_11_elems *elems, |
| u64 filter, u32 crc) |
| { |
| size_t left = len; |
| u8 *pos = start; |
| bool calc_crc = filter != 0; |
| |
| memset(elems, 0, sizeof(*elems)); |
| elems->ie_start = start; |
| elems->total_len = len; |
| |
| while (left >= 2) { |
| u8 id, elen; |
| |
| id = *pos++; |
| elen = *pos++; |
| left -= 2; |
| |
| if (elen > left) |
| break; |
| |
| if (calc_crc && id < 64 && (filter & BIT(id))) |
| crc = crc32_be(crc, pos - 2, elen + 2); |
| |
| switch (id) { |
| case WLAN_EID_SSID: |
| elems->ssid = pos; |
| elems->ssid_len = elen; |
| break; |
| case WLAN_EID_SUPP_RATES: |
| elems->supp_rates = pos; |
| elems->supp_rates_len = elen; |
| break; |
| case WLAN_EID_FH_PARAMS: |
| elems->fh_params = pos; |
| elems->fh_params_len = elen; |
| break; |
| case WLAN_EID_DS_PARAMS: |
| elems->ds_params = pos; |
| elems->ds_params_len = elen; |
| break; |
| case WLAN_EID_CF_PARAMS: |
| elems->cf_params = pos; |
| elems->cf_params_len = elen; |
| break; |
| case WLAN_EID_TIM: |
| if (elen >= sizeof(struct ieee80211_tim_ie)) { |
| elems->tim = (void *)pos; |
| elems->tim_len = elen; |
| } |
| break; |
| case WLAN_EID_IBSS_PARAMS: |
| elems->ibss_params = pos; |
| elems->ibss_params_len = elen; |
| break; |
| case WLAN_EID_CHALLENGE: |
| elems->challenge = pos; |
| elems->challenge_len = elen; |
| break; |
| case WLAN_EID_VENDOR_SPECIFIC: |
| if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && |
| pos[2] == 0xf2) { |
| /* Microsoft OUI (00:50:F2) */ |
| |
| if (calc_crc) |
| crc = crc32_be(crc, pos - 2, elen + 2); |
| |
| if (pos[3] == 1) { |
| /* OUI Type 1 - WPA IE */ |
| elems->wpa = pos; |
| elems->wpa_len = elen; |
| } else if (elen >= 5 && pos[3] == 2) { |
| /* OUI Type 2 - WMM IE */ |
| if (pos[4] == 0) { |
| elems->wmm_info = pos; |
| elems->wmm_info_len = elen; |
| } else if (pos[4] == 1) { |
| elems->wmm_param = pos; |
| elems->wmm_param_len = elen; |
| } |
| } |
| } |
| break; |
| case WLAN_EID_RSN: |
| elems->rsn = pos; |
| elems->rsn_len = elen; |
| break; |
| case WLAN_EID_ERP_INFO: |
| elems->erp_info = pos; |
| elems->erp_info_len = elen; |
| break; |
| case WLAN_EID_EXT_SUPP_RATES: |
| elems->ext_supp_rates = pos; |
| elems->ext_supp_rates_len = elen; |
| break; |
| case WLAN_EID_HT_CAPABILITY: |
| if (elen >= sizeof(struct ieee80211_ht_cap)) |
| elems->ht_cap_elem = (void *)pos; |
| break; |
| case WLAN_EID_HT_INFORMATION: |
| if (elen >= sizeof(struct ieee80211_ht_info)) |
| elems->ht_info_elem = (void *)pos; |
| break; |
| case WLAN_EID_MESH_ID: |
| elems->mesh_id = pos; |
| elems->mesh_id_len = elen; |
| break; |
| case WLAN_EID_MESH_CONFIG: |
| elems->mesh_config = pos; |
| elems->mesh_config_len = elen; |
| break; |
| case WLAN_EID_PEER_LINK: |
| elems->peer_link = pos; |
| elems->peer_link_len = elen; |
| break; |
| case WLAN_EID_PREQ: |
| elems->preq = pos; |
| elems->preq_len = elen; |
| break; |
| case WLAN_EID_PREP: |
| elems->prep = pos; |
| elems->prep_len = elen; |
| break; |
| case WLAN_EID_PERR: |
| elems->perr = pos; |
| elems->perr_len = elen; |
| break; |
| case WLAN_EID_CHANNEL_SWITCH: |
| elems->ch_switch_elem = pos; |
| elems->ch_switch_elem_len = elen; |
| break; |
| case WLAN_EID_QUIET: |
| if (!elems->quiet_elem) { |
| elems->quiet_elem = pos; |
| elems->quiet_elem_len = elen; |
| } |
| elems->num_of_quiet_elem++; |
| break; |
| case WLAN_EID_COUNTRY: |
| elems->country_elem = pos; |
| elems->country_elem_len = elen; |
| break; |
| case WLAN_EID_PWR_CONSTRAINT: |
| elems->pwr_constr_elem = pos; |
| elems->pwr_constr_elem_len = elen; |
| break; |
| case WLAN_EID_TIMEOUT_INTERVAL: |
| elems->timeout_int = pos; |
| elems->timeout_int_len = elen; |
| break; |
| default: |
| break; |
| } |
| |
| left -= elen; |
| pos += elen; |
| } |
| |
| return crc; |
| } |
| |
| void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct ieee80211_tx_queue_params qparam; |
| int i; |
| |
| if (!local->ops->conf_tx) |
| return; |
| |
| memset(&qparam, 0, sizeof(qparam)); |
| |
| qparam.aifs = 2; |
| |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) |
| qparam.cw_min = 31; |
| else |
| qparam.cw_min = 15; |
| |
| qparam.cw_max = 1023; |
| qparam.txop = 0; |
| |
| for (i = 0; i < local_to_hw(local)->queues; i++) |
| drv_conf_tx(local, i, &qparam); |
| } |
| |
| void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
| const size_t supp_rates_len, |
| const u8 *supp_rates) |
| { |
| struct ieee80211_local *local = sdata->local; |
| int i, have_higher_than_11mbit = 0; |
| |
| /* cf. IEEE 802.11 9.2.12 */ |
| for (i = 0; i < supp_rates_len; i++) |
| if ((supp_rates[i] & 0x7f) * 5 > 110) |
| have_higher_than_11mbit = 1; |
| |
| if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| have_higher_than_11mbit) |
| sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| else |
| sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| |
| ieee80211_set_wmm_default(sdata); |
| } |
| |
| void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
| int encrypt) |
| { |
| skb->dev = sdata->local->mdev; |
| skb_set_mac_header(skb, 0); |
| skb_set_network_header(skb, 0); |
| skb_set_transport_header(skb, 0); |
| |
| skb->iif = sdata->dev->ifindex; |
| skb->do_not_encrypt = !encrypt; |
| |
| dev_queue_xmit(skb); |
| } |
| |
| int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz) |
| { |
| int ret = -EINVAL; |
| struct ieee80211_channel *chan; |
| struct ieee80211_local *local = sdata->local; |
| |
| chan = ieee80211_get_channel(local->hw.wiphy, freqMHz); |
| |
| if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { |
| if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| chan->flags & IEEE80211_CHAN_NO_IBSS) |
| return ret; |
| local->oper_channel = chan; |
| local->oper_channel_type = NL80211_CHAN_NO_HT; |
| |
| if (local->sw_scanning || local->hw_scanning) |
| ret = 0; |
| else |
| ret = ieee80211_hw_config( |
| local, IEEE80211_CONF_CHANGE_CHANNEL); |
| } |
| |
| return ret; |
| } |
| |
| u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
| enum ieee80211_band band) |
| { |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_rate *bitrates; |
| u32 mandatory_rates; |
| enum ieee80211_rate_flags mandatory_flag; |
| int i; |
| |
| sband = local->hw.wiphy->bands[band]; |
| if (!sband) { |
| WARN_ON(1); |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| } |
| |
| if (band == IEEE80211_BAND_2GHZ) |
| mandatory_flag = IEEE80211_RATE_MANDATORY_B; |
| else |
| mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
| |
| bitrates = sband->bitrates; |
| mandatory_rates = 0; |
| for (i = 0; i < sband->n_bitrates; i++) |
| if (bitrates[i].flags & mandatory_flag) |
| mandatory_rates |= BIT(i); |
| return mandatory_rates; |
| } |
| |
| void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
| u16 transaction, u16 auth_alg, |
| u8 *extra, size_t extra_len, |
| const u8 *bssid, int encrypt) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| sizeof(*mgmt) + 6 + extra_len); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for auth " |
| "frame\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); |
| memset(mgmt, 0, 24 + 6); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_AUTH); |
| if (encrypt) |
| mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| memcpy(mgmt->da, bssid, ETH_ALEN); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| memcpy(mgmt->bssid, bssid, ETH_ALEN); |
| mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); |
| mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); |
| mgmt->u.auth.status_code = cpu_to_le16(0); |
| if (extra) |
| memcpy(skb_put(skb, extra_len), extra, extra_len); |
| |
| ieee80211_tx_skb(sdata, skb, encrypt); |
| } |
| |
| int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
| const u8 *ie, size_t ie_len) |
| { |
| struct ieee80211_supported_band *sband; |
| u8 *pos, *supp_rates_len, *esupp_rates_len = NULL; |
| int i; |
| |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| |
| pos = buffer; |
| |
| *pos++ = WLAN_EID_SUPP_RATES; |
| supp_rates_len = pos; |
| *pos++ = 0; |
| |
| for (i = 0; i < sband->n_bitrates; i++) { |
| struct ieee80211_rate *rate = &sband->bitrates[i]; |
| |
| if (esupp_rates_len) { |
| *esupp_rates_len += 1; |
| } else if (*supp_rates_len == 8) { |
| *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| esupp_rates_len = pos; |
| *pos++ = 1; |
| } else |
| *supp_rates_len += 1; |
| |
| *pos++ = rate->bitrate / 5; |
| } |
| |
| if (sband->ht_cap.ht_supported) { |
| __le16 tmp = cpu_to_le16(sband->ht_cap.cap); |
| |
| *pos++ = WLAN_EID_HT_CAPABILITY; |
| *pos++ = sizeof(struct ieee80211_ht_cap); |
| memset(pos, 0, sizeof(struct ieee80211_ht_cap)); |
| memcpy(pos, &tmp, sizeof(u16)); |
| pos += sizeof(u16); |
| /* TODO: needs a define here for << 2 */ |
| *pos++ = sband->ht_cap.ampdu_factor | |
| (sband->ht_cap.ampdu_density << 2); |
| memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); |
| pos += sizeof(sband->ht_cap.mcs); |
| pos += 2 + 4 + 1; /* ext info, BF cap, antsel */ |
| } |
| |
| /* |
| * If adding more here, adjust code in main.c |
| * that calculates local->scan_ies_len. |
| */ |
| |
| if (ie) { |
| memcpy(pos, ie, ie_len); |
| pos += ie_len; |
| } |
| |
| return pos - buffer; |
| } |
| |
| void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
| const u8 *ssid, size_t ssid_len, |
| const u8 *ie, size_t ie_len) |
| { |
| struct ieee80211_local *local = sdata->local; |
| struct sk_buff *skb; |
| struct ieee80211_mgmt *mgmt; |
| u8 *pos; |
| |
| skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 + |
| ie_len); |
| if (!skb) { |
| printk(KERN_DEBUG "%s: failed to allocate buffer for probe " |
| "request\n", sdata->dev->name); |
| return; |
| } |
| skb_reserve(skb, local->hw.extra_tx_headroom); |
| |
| mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| memset(mgmt, 0, 24); |
| mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| IEEE80211_STYPE_PROBE_REQ); |
| memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
| if (dst) { |
| memcpy(mgmt->da, dst, ETH_ALEN); |
| memcpy(mgmt->bssid, dst, ETH_ALEN); |
| } else { |
| memset(mgmt->da, 0xff, ETH_ALEN); |
| memset(mgmt->bssid, 0xff, ETH_ALEN); |
| } |
| pos = skb_put(skb, 2 + ssid_len); |
| *pos++ = WLAN_EID_SSID; |
| *pos++ = ssid_len; |
| memcpy(pos, ssid, ssid_len); |
| pos += ssid_len; |
| |
| skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len)); |
| |
| ieee80211_tx_skb(sdata, skb, 0); |
| } |
| |
| u32 ieee80211_sta_get_rates(struct ieee80211_local *local, |
| struct ieee802_11_elems *elems, |
| enum ieee80211_band band) |
| { |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_rate *bitrates; |
| size_t num_rates; |
| u32 supp_rates; |
| int i, j; |
| sband = local->hw.wiphy->bands[band]; |
| |
| if (!sband) { |
| WARN_ON(1); |
| sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| } |
| |
| bitrates = sband->bitrates; |
| num_rates = sband->n_bitrates; |
| supp_rates = 0; |
| for (i = 0; i < elems->supp_rates_len + |
| elems->ext_supp_rates_len; i++) { |
| u8 rate = 0; |
| int own_rate; |
| if (i < elems->supp_rates_len) |
| rate = elems->supp_rates[i]; |
| else if (elems->ext_supp_rates) |
| rate = elems->ext_supp_rates |
| [i - elems->supp_rates_len]; |
| own_rate = 5 * (rate & 0x7f); |
| for (j = 0; j < num_rates; j++) |
| if (bitrates[j].bitrate == own_rate) |
| supp_rates |= BIT(j); |
| } |
| return supp_rates; |
| } |
| |
| int ieee80211_reconfig(struct ieee80211_local *local) |
| { |
| struct ieee80211_hw *hw = &local->hw; |
| struct ieee80211_sub_if_data *sdata; |
| struct ieee80211_if_init_conf conf; |
| struct sta_info *sta; |
| unsigned long flags; |
| int res; |
| |
| /* restart hardware */ |
| if (local->open_count) { |
| res = drv_start(local); |
| |
| ieee80211_led_radio(local, hw->conf.radio_enabled); |
| } |
| |
| /* add interfaces */ |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| sdata->vif.type != NL80211_IFTYPE_MONITOR && |
| netif_running(sdata->dev)) { |
| conf.vif = &sdata->vif; |
| conf.type = sdata->vif.type; |
| conf.mac_addr = sdata->dev->dev_addr; |
| res = drv_add_interface(local, &conf); |
| } |
| } |
| |
| /* add STAs back */ |
| if (local->ops->sta_notify) { |
| spin_lock_irqsave(&local->sta_lock, flags); |
| list_for_each_entry(sta, &local->sta_list, list) { |
| if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| sdata = container_of(sdata->bss, |
| struct ieee80211_sub_if_data, |
| u.ap); |
| |
| drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD, |
| &sta->sta); |
| } |
| spin_unlock_irqrestore(&local->sta_lock, flags); |
| } |
| |
| /* Clear Suspend state so that ADDBA requests can be processed */ |
| |
| rcu_read_lock(); |
| |
| if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
| list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| clear_sta_flags(sta, WLAN_STA_SUSPEND); |
| } |
| } |
| |
| rcu_read_unlock(); |
| |
| /* setup RTS threshold */ |
| drv_set_rts_threshold(local, hw->wiphy->rts_threshold); |
| |
| /* reconfigure hardware */ |
| ieee80211_hw_config(local, ~0); |
| |
| netif_addr_lock_bh(local->mdev); |
| ieee80211_configure_filter(local); |
| netif_addr_unlock_bh(local->mdev); |
| |
| /* Finally also reconfigure all the BSS information */ |
| list_for_each_entry(sdata, &local->interfaces, list) { |
| u32 changed = ~0; |
| if (!netif_running(sdata->dev)) |
| continue; |
| switch (sdata->vif.type) { |
| case NL80211_IFTYPE_STATION: |
| /* disable beacon change bits */ |
| changed &= ~(BSS_CHANGED_BEACON | |
| BSS_CHANGED_BEACON_ENABLED); |
| /* fall through */ |
| case NL80211_IFTYPE_ADHOC: |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_MESH_POINT: |
| ieee80211_bss_info_change_notify(sdata, changed); |
| break; |
| case NL80211_IFTYPE_WDS: |
| break; |
| case NL80211_IFTYPE_AP_VLAN: |
| case NL80211_IFTYPE_MONITOR: |
| /* ignore virtual */ |
| break; |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case __NL80211_IFTYPE_AFTER_LAST: |
| WARN_ON(1); |
| break; |
| } |
| } |
| |
| /* add back keys */ |
| list_for_each_entry(sdata, &local->interfaces, list) |
| if (netif_running(sdata->dev)) |
| ieee80211_enable_keys(sdata); |
| |
| ieee80211_wake_queues_by_reason(hw, |
| IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
| |
| return 0; |
| } |