Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * utilities for mac80211 |
| 12 | */ |
| 13 | |
| 14 | #include <net/mac80211.h> |
| 15 | #include <linux/netdevice.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/if_arp.h> |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 21 | #include <linux/bitmap.h> |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 22 | #include <linux/crc32.h> |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 23 | #include <net/net_namespace.h> |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 24 | #include <net/cfg80211.h> |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 25 | #include <net/rtnetlink.h> |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 26 | |
| 27 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 28 | #include "driver-ops.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 29 | #include "rate.h" |
Luis Carlos Cobo | ee38585 | 2008-02-23 15:17:11 +0100 | [diff] [blame] | 30 | #include "mesh.h" |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 31 | #include "wme.h" |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 32 | #include "led.h" |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 33 | #include "wep.h" |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 34 | |
| 35 | /* privid for wiphys to determine whether they belong to us or not */ |
| 36 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; |
| 37 | |
Luis R. Rodriguez | 9a95371 | 2009-01-22 15:05:53 -0800 | [diff] [blame] | 38 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
| 39 | { |
| 40 | struct ieee80211_local *local; |
| 41 | BUG_ON(!wiphy); |
| 42 | |
| 43 | local = wiphy_priv(wiphy); |
| 44 | return &local->hw; |
| 45 | } |
| 46 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 47 | |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 48 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 49 | enum nl80211_iftype type) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 50 | { |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 51 | __le16 fc = hdr->frame_control; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 52 | |
Ron Rindjunsky | 98f0b0a | 2007-12-18 17:23:53 +0200 | [diff] [blame] | 53 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
| 54 | if (len < 16) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 55 | return NULL; |
| 56 | |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 57 | if (ieee80211_is_data(fc)) { |
Ron Rindjunsky | 98f0b0a | 2007-12-18 17:23:53 +0200 | [diff] [blame] | 58 | if (len < 24) /* drop incorrect hdr len (data) */ |
| 59 | return NULL; |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 60 | |
| 61 | if (ieee80211_has_a4(fc)) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 62 | return NULL; |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 63 | if (ieee80211_has_tods(fc)) |
| 64 | return hdr->addr1; |
| 65 | if (ieee80211_has_fromds(fc)) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 66 | return hdr->addr2; |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 67 | |
| 68 | return hdr->addr3; |
| 69 | } |
| 70 | |
| 71 | if (ieee80211_is_mgmt(fc)) { |
Ron Rindjunsky | 98f0b0a | 2007-12-18 17:23:53 +0200 | [diff] [blame] | 72 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
| 73 | return NULL; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 74 | return hdr->addr3; |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | if (ieee80211_is_ctl(fc)) { |
| 78 | if(ieee80211_is_pspoll(fc)) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 79 | return hdr->addr1; |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 80 | |
| 81 | if (ieee80211_is_back_req(fc)) { |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 82 | switch (type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 83 | case NL80211_IFTYPE_STATION: |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 84 | return hdr->addr2; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 85 | case NL80211_IFTYPE_AP: |
| 86 | case NL80211_IFTYPE_AP_VLAN: |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 87 | return hdr->addr1; |
| 88 | default: |
Harvey Harrison | a494bb1 | 2008-06-11 14:21:58 -0700 | [diff] [blame] | 89 | break; /* fall through to the return */ |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 90 | } |
| 91 | } |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | return NULL; |
| 95 | } |
| 96 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 97 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 98 | { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 99 | struct sk_buff *skb = tx->skb; |
| 100 | struct ieee80211_hdr *hdr; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 101 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 102 | do { |
| 103 | hdr = (struct ieee80211_hdr *) skb->data; |
| 104 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| 105 | } while ((skb = skb->next)); |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, |
| 109 | int rate, int erp, int short_preamble) |
| 110 | { |
| 111 | int dur; |
| 112 | |
| 113 | /* calculate duration (in microseconds, rounded up to next higher |
| 114 | * integer if it includes a fractional microsecond) to send frame of |
| 115 | * len bytes (does not include FCS) at the given rate. Duration will |
| 116 | * also include SIFS. |
| 117 | * |
| 118 | * rate is in 100 kbps, so divident is multiplied by 10 in the |
| 119 | * DIV_ROUND_UP() operations. |
| 120 | */ |
| 121 | |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 122 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 123 | /* |
| 124 | * OFDM: |
| 125 | * |
| 126 | * N_DBPS = DATARATE x 4 |
| 127 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) |
| 128 | * (16 = SIGNAL time, 6 = tail bits) |
| 129 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext |
| 130 | * |
| 131 | * T_SYM = 4 usec |
| 132 | * 802.11a - 17.5.2: aSIFSTime = 16 usec |
| 133 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + |
| 134 | * signal ext = 6 usec |
| 135 | */ |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 136 | dur = 16; /* SIFS + signal ext */ |
| 137 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ |
| 138 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ |
| 139 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, |
| 140 | 4 * rate); /* T_SYM x N_SYM */ |
| 141 | } else { |
| 142 | /* |
| 143 | * 802.11b or 802.11g with 802.11b compatibility: |
| 144 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + |
| 145 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. |
| 146 | * |
| 147 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 |
| 148 | * aSIFSTime = 10 usec |
| 149 | * aPreambleLength = 144 usec or 72 usec with short preamble |
| 150 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble |
| 151 | */ |
| 152 | dur = 10; /* aSIFSTime = 10 usec */ |
| 153 | dur += short_preamble ? (72 + 24) : (144 + 48); |
| 154 | |
| 155 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); |
| 156 | } |
| 157 | |
| 158 | return dur; |
| 159 | } |
| 160 | |
| 161 | /* Exported duration function for driver use */ |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 162 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
| 163 | struct ieee80211_vif *vif, |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 164 | size_t frame_len, |
| 165 | struct ieee80211_rate *rate) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 166 | { |
| 167 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 168 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 169 | u16 dur; |
| 170 | int erp; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 171 | bool short_preamble = false; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 172 | |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 173 | erp = 0; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 174 | if (vif) { |
| 175 | sdata = vif_to_sdata(vif); |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 176 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 177 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| 178 | erp = rate->flags & IEEE80211_RATE_ERP_G; |
| 179 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 180 | |
| 181 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 182 | short_preamble); |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 183 | |
| 184 | return cpu_to_le16(dur); |
| 185 | } |
| 186 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); |
| 187 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 188 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
| 189 | struct ieee80211_vif *vif, size_t frame_len, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 190 | const struct ieee80211_tx_info *frame_txctl) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 191 | { |
| 192 | struct ieee80211_local *local = hw_to_local(hw); |
| 193 | struct ieee80211_rate *rate; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 194 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 195 | bool short_preamble; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 196 | int erp; |
| 197 | u16 dur; |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 198 | struct ieee80211_supported_band *sband; |
| 199 | |
| 200 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 201 | |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 202 | short_preamble = false; |
Daniel Drake | 7e9ed18 | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 203 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 204 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 205 | |
| 206 | erp = 0; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 207 | if (vif) { |
| 208 | sdata = vif_to_sdata(vif); |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 209 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 210 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| 211 | erp = rate->flags & IEEE80211_RATE_ERP_G; |
| 212 | } |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 213 | |
| 214 | /* CTS duration */ |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 215 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 216 | erp, short_preamble); |
| 217 | /* Data frame duration */ |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 218 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 219 | erp, short_preamble); |
| 220 | /* ACK duration */ |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 221 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 222 | erp, short_preamble); |
| 223 | |
| 224 | return cpu_to_le16(dur); |
| 225 | } |
| 226 | EXPORT_SYMBOL(ieee80211_rts_duration); |
| 227 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 228 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
| 229 | struct ieee80211_vif *vif, |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 230 | size_t frame_len, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 231 | const struct ieee80211_tx_info *frame_txctl) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 232 | { |
| 233 | struct ieee80211_local *local = hw_to_local(hw); |
| 234 | struct ieee80211_rate *rate; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 235 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 471b3ef | 2007-12-28 14:32:58 +0100 | [diff] [blame] | 236 | bool short_preamble; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 237 | int erp; |
| 238 | u16 dur; |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 239 | struct ieee80211_supported_band *sband; |
| 240 | |
| 241 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 242 | |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 243 | short_preamble = false; |
Daniel Drake | 7e9ed18 | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 244 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 245 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 246 | erp = 0; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 247 | if (vif) { |
| 248 | sdata = vif_to_sdata(vif); |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 249 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 250 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| 251 | erp = rate->flags & IEEE80211_RATE_ERP_G; |
| 252 | } |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 253 | |
| 254 | /* Data frame duration */ |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 255 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 256 | erp, short_preamble); |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 257 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 258 | /* ACK duration */ |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 259 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 260 | erp, short_preamble); |
| 261 | } |
| 262 | |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 263 | return cpu_to_le16(dur); |
| 264 | } |
| 265 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); |
| 266 | |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 267 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
| 268 | enum queue_stop_reason reason) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 269 | { |
| 270 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 271 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 272 | |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 273 | if (WARN_ON(queue >= hw->queues)) |
| 274 | return; |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 275 | |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 276 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
| 277 | |
| 278 | if (local->queue_stop_reasons[queue] != 0) |
| 279 | /* someone still has this queue stopped */ |
| 280 | return; |
| 281 | |
Johannes Berg | 7236fe2 | 2010-03-22 13:42:43 -0700 | [diff] [blame] | 282 | if (skb_queue_empty(&local->pending[queue])) { |
| 283 | rcu_read_lock(); |
| 284 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| 285 | netif_tx_wake_queue(netdev_get_tx_queue(sdata->dev, queue)); |
| 286 | rcu_read_unlock(); |
| 287 | } else |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 288 | tasklet_schedule(&local->tx_pending_tasklet); |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 289 | } |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 290 | |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 291 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
| 292 | enum queue_stop_reason reason) |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 293 | { |
| 294 | struct ieee80211_local *local = hw_to_local(hw); |
| 295 | unsigned long flags; |
| 296 | |
| 297 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 298 | __ieee80211_wake_queue(hw, queue, reason); |
| 299 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 300 | } |
| 301 | |
| 302 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) |
| 303 | { |
| 304 | ieee80211_wake_queue_by_reason(hw, queue, |
| 305 | IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| 306 | } |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 307 | EXPORT_SYMBOL(ieee80211_wake_queue); |
| 308 | |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 309 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
| 310 | enum queue_stop_reason reason) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 311 | { |
| 312 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 313 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 314 | |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 315 | if (WARN_ON(queue >= hw->queues)) |
| 316 | return; |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 317 | |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 318 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 319 | |
| 320 | rcu_read_lock(); |
| 321 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
| 322 | netif_tx_stop_queue(netdev_get_tx_queue(sdata->dev, queue)); |
| 323 | rcu_read_unlock(); |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 324 | } |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 325 | |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 326 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
| 327 | enum queue_stop_reason reason) |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 328 | { |
| 329 | struct ieee80211_local *local = hw_to_local(hw); |
| 330 | unsigned long flags; |
| 331 | |
| 332 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 333 | __ieee80211_stop_queue(hw, queue, reason); |
| 334 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 335 | } |
| 336 | |
| 337 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) |
| 338 | { |
| 339 | ieee80211_stop_queue_by_reason(hw, queue, |
| 340 | IEEE80211_QUEUE_STOP_REASON_DRIVER); |
| 341 | } |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 342 | EXPORT_SYMBOL(ieee80211_stop_queue); |
| 343 | |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 344 | void ieee80211_add_pending_skb(struct ieee80211_local *local, |
| 345 | struct sk_buff *skb) |
| 346 | { |
| 347 | struct ieee80211_hw *hw = &local->hw; |
| 348 | unsigned long flags; |
| 349 | int queue = skb_get_queue_mapping(skb); |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 350 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 351 | |
| 352 | if (WARN_ON(!info->control.vif)) { |
Roel Kluin | 0819663 | 2009-10-06 15:52:35 +0200 | [diff] [blame] | 353 | kfree_skb(skb); |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 354 | return; |
| 355 | } |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 356 | |
| 357 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 358 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 359 | __skb_queue_tail(&local->pending[queue], skb); |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 360 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
| 361 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 362 | } |
| 363 | |
| 364 | int ieee80211_add_pending_skbs(struct ieee80211_local *local, |
| 365 | struct sk_buff_head *skbs) |
| 366 | { |
| 367 | struct ieee80211_hw *hw = &local->hw; |
| 368 | struct sk_buff *skb; |
| 369 | unsigned long flags; |
| 370 | int queue, ret = 0, i; |
| 371 | |
| 372 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 373 | for (i = 0; i < hw->queues; i++) |
| 374 | __ieee80211_stop_queue(hw, i, |
| 375 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
| 376 | |
| 377 | while ((skb = skb_dequeue(skbs))) { |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 378 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 379 | |
| 380 | if (WARN_ON(!info->control.vif)) { |
Roel Kluin | 0819663 | 2009-10-06 15:52:35 +0200 | [diff] [blame] | 381 | kfree_skb(skb); |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 382 | continue; |
| 383 | } |
| 384 | |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 385 | ret++; |
| 386 | queue = skb_get_queue_mapping(skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 387 | __skb_queue_tail(&local->pending[queue], skb); |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 388 | } |
| 389 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 390 | for (i = 0; i < hw->queues; i++) |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 391 | __ieee80211_wake_queue(hw, i, |
| 392 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 393 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 394 | |
| 395 | return ret; |
| 396 | } |
| 397 | |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 398 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
| 399 | enum queue_stop_reason reason) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 400 | { |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 401 | struct ieee80211_local *local = hw_to_local(hw); |
| 402 | unsigned long flags; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 403 | int i; |
| 404 | |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 405 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 406 | |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 407 | for (i = 0; i < hw->queues; i++) |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 408 | __ieee80211_stop_queue(hw, i, reason); |
| 409 | |
| 410 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 411 | } |
| 412 | |
| 413 | void ieee80211_stop_queues(struct ieee80211_hw *hw) |
| 414 | { |
| 415 | ieee80211_stop_queues_by_reason(hw, |
| 416 | IEEE80211_QUEUE_STOP_REASON_DRIVER); |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 417 | } |
| 418 | EXPORT_SYMBOL(ieee80211_stop_queues); |
| 419 | |
Tomas Winkler | 92ab853 | 2008-07-24 21:02:04 +0300 | [diff] [blame] | 420 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
| 421 | { |
| 422 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 423 | unsigned long flags; |
| 424 | int ret; |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 425 | |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 426 | if (WARN_ON(queue >= hw->queues)) |
| 427 | return true; |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 428 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 429 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 430 | ret = !!local->queue_stop_reasons[queue]; |
| 431 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 432 | return ret; |
Tomas Winkler | 92ab853 | 2008-07-24 21:02:04 +0300 | [diff] [blame] | 433 | } |
| 434 | EXPORT_SYMBOL(ieee80211_queue_stopped); |
| 435 | |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 436 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
| 437 | enum queue_stop_reason reason) |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 438 | { |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 439 | struct ieee80211_local *local = hw_to_local(hw); |
| 440 | unsigned long flags; |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 441 | int i; |
| 442 | |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 443 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 444 | |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 445 | for (i = 0; i < hw->queues; i++) |
Kalle Valo | ce7c911 | 2008-12-18 23:35:20 +0200 | [diff] [blame] | 446 | __ieee80211_wake_queue(hw, i, reason); |
| 447 | |
| 448 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 449 | } |
| 450 | |
| 451 | void ieee80211_wake_queues(struct ieee80211_hw *hw) |
| 452 | { |
| 453 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); |
Johannes Berg | c2d1560 | 2007-07-27 15:43:23 +0200 | [diff] [blame] | 454 | } |
| 455 | EXPORT_SYMBOL(ieee80211_wake_queues); |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 456 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 457 | void ieee80211_iterate_active_interfaces( |
| 458 | struct ieee80211_hw *hw, |
| 459 | void (*iterator)(void *data, u8 *mac, |
| 460 | struct ieee80211_vif *vif), |
| 461 | void *data) |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 462 | { |
| 463 | struct ieee80211_local *local = hw_to_local(hw); |
| 464 | struct ieee80211_sub_if_data *sdata; |
| 465 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 466 | mutex_lock(&local->iflist_mtx); |
Ivo van Doorn | 2f561fe | 2008-05-10 13:40:49 +0200 | [diff] [blame] | 467 | |
| 468 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 469 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 470 | case __NL80211_IFTYPE_AFTER_LAST: |
| 471 | case NL80211_IFTYPE_UNSPECIFIED: |
| 472 | case NL80211_IFTYPE_MONITOR: |
| 473 | case NL80211_IFTYPE_AP_VLAN: |
Ivo van Doorn | 2f561fe | 2008-05-10 13:40:49 +0200 | [diff] [blame] | 474 | continue; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 475 | case NL80211_IFTYPE_AP: |
| 476 | case NL80211_IFTYPE_STATION: |
| 477 | case NL80211_IFTYPE_ADHOC: |
| 478 | case NL80211_IFTYPE_WDS: |
| 479 | case NL80211_IFTYPE_MESH_POINT: |
Ivo van Doorn | 2f561fe | 2008-05-10 13:40:49 +0200 | [diff] [blame] | 480 | break; |
| 481 | } |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 482 | if (ieee80211_sdata_running(sdata)) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 483 | iterator(data, sdata->vif.addr, |
Ivo van Doorn | 2f561fe | 2008-05-10 13:40:49 +0200 | [diff] [blame] | 484 | &sdata->vif); |
| 485 | } |
| 486 | |
Johannes Berg | c771c9d | 2009-01-23 22:54:03 +0100 | [diff] [blame] | 487 | mutex_unlock(&local->iflist_mtx); |
Ivo van Doorn | 2f561fe | 2008-05-10 13:40:49 +0200 | [diff] [blame] | 488 | } |
| 489 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); |
| 490 | |
| 491 | void ieee80211_iterate_active_interfaces_atomic( |
| 492 | struct ieee80211_hw *hw, |
| 493 | void (*iterator)(void *data, u8 *mac, |
| 494 | struct ieee80211_vif *vif), |
| 495 | void *data) |
| 496 | { |
| 497 | struct ieee80211_local *local = hw_to_local(hw); |
| 498 | struct ieee80211_sub_if_data *sdata; |
| 499 | |
Johannes Berg | e38bad4 | 2007-11-28 10:55:32 +0100 | [diff] [blame] | 500 | rcu_read_lock(); |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 501 | |
Johannes Berg | e38bad4 | 2007-11-28 10:55:32 +0100 | [diff] [blame] | 502 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Johannes Berg | 51fb61e | 2007-12-19 01:31:27 +0100 | [diff] [blame] | 503 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 504 | case __NL80211_IFTYPE_AFTER_LAST: |
| 505 | case NL80211_IFTYPE_UNSPECIFIED: |
| 506 | case NL80211_IFTYPE_MONITOR: |
| 507 | case NL80211_IFTYPE_AP_VLAN: |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 508 | continue; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 509 | case NL80211_IFTYPE_AP: |
| 510 | case NL80211_IFTYPE_STATION: |
| 511 | case NL80211_IFTYPE_ADHOC: |
| 512 | case NL80211_IFTYPE_WDS: |
| 513 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 514 | break; |
| 515 | } |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 516 | if (ieee80211_sdata_running(sdata)) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 517 | iterator(data, sdata->vif.addr, |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 518 | &sdata->vif); |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 519 | } |
Johannes Berg | e38bad4 | 2007-11-28 10:55:32 +0100 | [diff] [blame] | 520 | |
| 521 | rcu_read_unlock(); |
Johannes Berg | dabeb34 | 2007-11-09 01:57:29 +0100 | [diff] [blame] | 522 | } |
Ivo van Doorn | 2f561fe | 2008-05-10 13:40:49 +0200 | [diff] [blame] | 523 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 524 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 525 | /* |
| 526 | * Nothing should have been stuffed into the workqueue during |
| 527 | * the suspend->resume cycle. If this WARN is seen then there |
| 528 | * is a bug with either the driver suspend or something in |
| 529 | * mac80211 stuffing into the workqueue which we haven't yet |
| 530 | * cleared during mac80211's suspend cycle. |
| 531 | */ |
| 532 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) |
| 533 | { |
Johannes Berg | ceb99fe | 2009-11-19 14:29:39 +0100 | [diff] [blame] | 534 | if (WARN(local->suspended && !local->resuming, |
| 535 | "queueing ieee80211 work while going to suspend\n")) |
| 536 | return false; |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 537 | |
| 538 | return true; |
| 539 | } |
| 540 | |
| 541 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) |
| 542 | { |
| 543 | struct ieee80211_local *local = hw_to_local(hw); |
| 544 | |
| 545 | if (!ieee80211_can_queue_work(local)) |
| 546 | return; |
| 547 | |
| 548 | queue_work(local->workqueue, work); |
| 549 | } |
| 550 | EXPORT_SYMBOL(ieee80211_queue_work); |
| 551 | |
| 552 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, |
| 553 | struct delayed_work *dwork, |
| 554 | unsigned long delay) |
| 555 | { |
| 556 | struct ieee80211_local *local = hw_to_local(hw); |
| 557 | |
| 558 | if (!ieee80211_can_queue_work(local)) |
| 559 | return; |
| 560 | |
| 561 | queue_delayed_work(local->workqueue, dwork, delay); |
| 562 | } |
| 563 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); |
| 564 | |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 565 | void ieee802_11_parse_elems(u8 *start, size_t len, |
| 566 | struct ieee802_11_elems *elems) |
| 567 | { |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 568 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); |
| 569 | } |
| 570 | |
| 571 | u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, |
| 572 | struct ieee802_11_elems *elems, |
| 573 | u64 filter, u32 crc) |
| 574 | { |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 575 | size_t left = len; |
| 576 | u8 *pos = start; |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 577 | bool calc_crc = filter != 0; |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 578 | |
| 579 | memset(elems, 0, sizeof(*elems)); |
| 580 | elems->ie_start = start; |
| 581 | elems->total_len = len; |
| 582 | |
| 583 | while (left >= 2) { |
| 584 | u8 id, elen; |
| 585 | |
| 586 | id = *pos++; |
| 587 | elen = *pos++; |
| 588 | left -= 2; |
| 589 | |
| 590 | if (elen > left) |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 591 | break; |
| 592 | |
Vasanthakumar Thiagarajan | 1814077 | 2009-12-04 17:41:34 +0530 | [diff] [blame] | 593 | if (calc_crc && id < 64 && (filter & (1ULL << id))) |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 594 | crc = crc32_be(crc, pos - 2, elen + 2); |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 595 | |
| 596 | switch (id) { |
| 597 | case WLAN_EID_SSID: |
| 598 | elems->ssid = pos; |
| 599 | elems->ssid_len = elen; |
| 600 | break; |
| 601 | case WLAN_EID_SUPP_RATES: |
| 602 | elems->supp_rates = pos; |
| 603 | elems->supp_rates_len = elen; |
| 604 | break; |
| 605 | case WLAN_EID_FH_PARAMS: |
| 606 | elems->fh_params = pos; |
| 607 | elems->fh_params_len = elen; |
| 608 | break; |
| 609 | case WLAN_EID_DS_PARAMS: |
| 610 | elems->ds_params = pos; |
| 611 | elems->ds_params_len = elen; |
| 612 | break; |
| 613 | case WLAN_EID_CF_PARAMS: |
| 614 | elems->cf_params = pos; |
| 615 | elems->cf_params_len = elen; |
| 616 | break; |
| 617 | case WLAN_EID_TIM: |
Johannes Berg | e7ec86f | 2009-04-18 17:33:24 +0200 | [diff] [blame] | 618 | if (elen >= sizeof(struct ieee80211_tim_ie)) { |
| 619 | elems->tim = (void *)pos; |
| 620 | elems->tim_len = elen; |
| 621 | } |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 622 | break; |
| 623 | case WLAN_EID_IBSS_PARAMS: |
| 624 | elems->ibss_params = pos; |
| 625 | elems->ibss_params_len = elen; |
| 626 | break; |
| 627 | case WLAN_EID_CHALLENGE: |
| 628 | elems->challenge = pos; |
| 629 | elems->challenge_len = elen; |
| 630 | break; |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 631 | case WLAN_EID_VENDOR_SPECIFIC: |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 632 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && |
| 633 | pos[2] == 0xf2) { |
| 634 | /* Microsoft OUI (00:50:F2) */ |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 635 | |
| 636 | if (calc_crc) |
| 637 | crc = crc32_be(crc, pos - 2, elen + 2); |
| 638 | |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 639 | if (pos[3] == 1) { |
| 640 | /* OUI Type 1 - WPA IE */ |
| 641 | elems->wpa = pos; |
| 642 | elems->wpa_len = elen; |
| 643 | } else if (elen >= 5 && pos[3] == 2) { |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 644 | /* OUI Type 2 - WMM IE */ |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 645 | if (pos[4] == 0) { |
| 646 | elems->wmm_info = pos; |
| 647 | elems->wmm_info_len = elen; |
| 648 | } else if (pos[4] == 1) { |
| 649 | elems->wmm_param = pos; |
| 650 | elems->wmm_param_len = elen; |
| 651 | } |
| 652 | } |
| 653 | } |
| 654 | break; |
| 655 | case WLAN_EID_RSN: |
| 656 | elems->rsn = pos; |
| 657 | elems->rsn_len = elen; |
| 658 | break; |
| 659 | case WLAN_EID_ERP_INFO: |
| 660 | elems->erp_info = pos; |
| 661 | elems->erp_info_len = elen; |
| 662 | break; |
| 663 | case WLAN_EID_EXT_SUPP_RATES: |
| 664 | elems->ext_supp_rates = pos; |
| 665 | elems->ext_supp_rates_len = elen; |
| 666 | break; |
| 667 | case WLAN_EID_HT_CAPABILITY: |
Johannes Berg | 0991481 | 2008-10-07 19:31:17 +0200 | [diff] [blame] | 668 | if (elen >= sizeof(struct ieee80211_ht_cap)) |
| 669 | elems->ht_cap_elem = (void *)pos; |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 670 | break; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 671 | case WLAN_EID_HT_INFORMATION: |
| 672 | if (elen >= sizeof(struct ieee80211_ht_info)) |
Johannes Berg | 0991481 | 2008-10-07 19:31:17 +0200 | [diff] [blame] | 673 | elems->ht_info_elem = (void *)pos; |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 674 | break; |
| 675 | case WLAN_EID_MESH_ID: |
| 676 | elems->mesh_id = pos; |
| 677 | elems->mesh_id_len = elen; |
| 678 | break; |
| 679 | case WLAN_EID_MESH_CONFIG: |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 680 | if (elen >= sizeof(struct ieee80211_meshconf_ie)) |
| 681 | elems->mesh_config = (void *)pos; |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 682 | break; |
| 683 | case WLAN_EID_PEER_LINK: |
| 684 | elems->peer_link = pos; |
| 685 | elems->peer_link_len = elen; |
| 686 | break; |
| 687 | case WLAN_EID_PREQ: |
| 688 | elems->preq = pos; |
| 689 | elems->preq_len = elen; |
| 690 | break; |
| 691 | case WLAN_EID_PREP: |
| 692 | elems->prep = pos; |
| 693 | elems->prep_len = elen; |
| 694 | break; |
| 695 | case WLAN_EID_PERR: |
| 696 | elems->perr = pos; |
| 697 | elems->perr_len = elen; |
| 698 | break; |
Rui Paulo | 90a5e16 | 2009-11-11 00:01:31 +0000 | [diff] [blame] | 699 | case WLAN_EID_RANN: |
| 700 | if (elen >= sizeof(struct ieee80211_rann_ie)) |
| 701 | elems->rann = (void *)pos; |
| 702 | break; |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 703 | case WLAN_EID_CHANNEL_SWITCH: |
| 704 | elems->ch_switch_elem = pos; |
| 705 | elems->ch_switch_elem_len = elen; |
| 706 | break; |
| 707 | case WLAN_EID_QUIET: |
| 708 | if (!elems->quiet_elem) { |
| 709 | elems->quiet_elem = pos; |
| 710 | elems->quiet_elem_len = elen; |
| 711 | } |
| 712 | elems->num_of_quiet_elem++; |
| 713 | break; |
| 714 | case WLAN_EID_COUNTRY: |
| 715 | elems->country_elem = pos; |
| 716 | elems->country_elem_len = elen; |
| 717 | break; |
| 718 | case WLAN_EID_PWR_CONSTRAINT: |
| 719 | elems->pwr_constr_elem = pos; |
| 720 | elems->pwr_constr_elem_len = elen; |
| 721 | break; |
Jouni Malinen | f797eb7 | 2009-01-19 18:48:46 +0200 | [diff] [blame] | 722 | case WLAN_EID_TIMEOUT_INTERVAL: |
| 723 | elems->timeout_int = pos; |
| 724 | elems->timeout_int_len = elen; |
Jouni Malinen | 63a5ab8 | 2009-01-08 13:32:09 +0200 | [diff] [blame] | 725 | break; |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 726 | default: |
| 727 | break; |
| 728 | } |
| 729 | |
| 730 | left -= elen; |
| 731 | pos += elen; |
| 732 | } |
Johannes Berg | d91f36d | 2009-04-16 13:17:26 +0200 | [diff] [blame] | 733 | |
| 734 | return crc; |
Johannes Berg | 37ffc8d | 2008-09-08 16:40:36 +0200 | [diff] [blame] | 735 | } |
Johannes Berg | 5825fe10 | 2008-09-09 12:56:01 +0200 | [diff] [blame] | 736 | |
| 737 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) |
| 738 | { |
| 739 | struct ieee80211_local *local = sdata->local; |
| 740 | struct ieee80211_tx_queue_params qparam; |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 741 | int queue; |
| 742 | bool use_11b; |
| 743 | int aCWmin, aCWmax; |
Johannes Berg | 5825fe10 | 2008-09-09 12:56:01 +0200 | [diff] [blame] | 744 | |
| 745 | if (!local->ops->conf_tx) |
| 746 | return; |
| 747 | |
| 748 | memset(&qparam, 0, sizeof(qparam)); |
| 749 | |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 750 | use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && |
| 751 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); |
Johannes Berg | 5825fe10 | 2008-09-09 12:56:01 +0200 | [diff] [blame] | 752 | |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 753 | for (queue = 0; queue < local_to_hw(local)->queues; queue++) { |
| 754 | /* Set defaults according to 802.11-2007 Table 7-37 */ |
| 755 | aCWmax = 1023; |
| 756 | if (use_11b) |
| 757 | aCWmin = 31; |
| 758 | else |
| 759 | aCWmin = 15; |
Johannes Berg | 5825fe10 | 2008-09-09 12:56:01 +0200 | [diff] [blame] | 760 | |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 761 | switch (queue) { |
| 762 | case 3: /* AC_BK */ |
Johannes Berg | 7ba10a8 | 2009-05-27 09:41:06 +0200 | [diff] [blame] | 763 | qparam.cw_max = aCWmax; |
| 764 | qparam.cw_min = aCWmin; |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 765 | qparam.txop = 0; |
| 766 | qparam.aifs = 7; |
| 767 | break; |
| 768 | default: /* never happens but let's not leave undefined */ |
| 769 | case 2: /* AC_BE */ |
Johannes Berg | 7ba10a8 | 2009-05-27 09:41:06 +0200 | [diff] [blame] | 770 | qparam.cw_max = aCWmax; |
| 771 | qparam.cw_min = aCWmin; |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 772 | qparam.txop = 0; |
| 773 | qparam.aifs = 3; |
| 774 | break; |
| 775 | case 1: /* AC_VI */ |
| 776 | qparam.cw_max = aCWmin; |
| 777 | qparam.cw_min = (aCWmin + 1) / 2 - 1; |
| 778 | if (use_11b) |
| 779 | qparam.txop = 6016/32; |
| 780 | else |
| 781 | qparam.txop = 3008/32; |
| 782 | qparam.aifs = 2; |
| 783 | break; |
| 784 | case 0: /* AC_VO */ |
| 785 | qparam.cw_max = (aCWmin + 1) / 2 - 1; |
| 786 | qparam.cw_min = (aCWmin + 1) / 4 - 1; |
| 787 | if (use_11b) |
| 788 | qparam.txop = 3264/32; |
| 789 | else |
| 790 | qparam.txop = 1504/32; |
| 791 | qparam.aifs = 2; |
| 792 | break; |
| 793 | } |
Johannes Berg | 5825fe10 | 2008-09-09 12:56:01 +0200 | [diff] [blame] | 794 | |
Kalle Valo | ab13315 | 2010-01-12 10:42:31 +0200 | [diff] [blame] | 795 | qparam.uapsd = false; |
| 796 | |
Johannes Berg | aa837e1 | 2009-05-07 16:16:24 +0200 | [diff] [blame] | 797 | drv_conf_tx(local, queue, &qparam); |
| 798 | } |
Johannes Berg | 5825fe10 | 2008-09-09 12:56:01 +0200 | [diff] [blame] | 799 | } |
Johannes Berg | e50db65 | 2008-09-09 15:07:09 +0200 | [diff] [blame] | 800 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 801 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
| 802 | const size_t supp_rates_len, |
| 803 | const u8 *supp_rates) |
| 804 | { |
| 805 | struct ieee80211_local *local = sdata->local; |
| 806 | int i, have_higher_than_11mbit = 0; |
| 807 | |
| 808 | /* cf. IEEE 802.11 9.2.12 */ |
| 809 | for (i = 0; i < supp_rates_len; i++) |
| 810 | if ((supp_rates[i] & 0x7f) * 5 > 110) |
| 811 | have_higher_than_11mbit = 1; |
| 812 | |
| 813 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
| 814 | have_higher_than_11mbit) |
| 815 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| 816 | else |
| 817 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| 818 | |
| 819 | ieee80211_set_wmm_default(sdata); |
| 820 | } |
| 821 | |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 822 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
Johannes Berg | 96dd22a | 2008-09-11 00:01:57 +0200 | [diff] [blame] | 823 | enum ieee80211_band band) |
| 824 | { |
| 825 | struct ieee80211_supported_band *sband; |
| 826 | struct ieee80211_rate *bitrates; |
Johannes Berg | 881d948 | 2009-01-21 15:13:48 +0100 | [diff] [blame] | 827 | u32 mandatory_rates; |
Johannes Berg | 96dd22a | 2008-09-11 00:01:57 +0200 | [diff] [blame] | 828 | enum ieee80211_rate_flags mandatory_flag; |
| 829 | int i; |
| 830 | |
| 831 | sband = local->hw.wiphy->bands[band]; |
| 832 | if (!sband) { |
| 833 | WARN_ON(1); |
| 834 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 835 | } |
| 836 | |
| 837 | if (band == IEEE80211_BAND_2GHZ) |
| 838 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; |
| 839 | else |
| 840 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
| 841 | |
| 842 | bitrates = sband->bitrates; |
| 843 | mandatory_rates = 0; |
| 844 | for (i = 0; i < sband->n_bitrates; i++) |
| 845 | if (bitrates[i].flags & mandatory_flag) |
| 846 | mandatory_rates |= BIT(i); |
| 847 | return mandatory_rates; |
| 848 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 849 | |
| 850 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
| 851 | u16 transaction, u16 auth_alg, |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 852 | u8 *extra, size_t extra_len, const u8 *bssid, |
| 853 | const u8 *key, u8 key_len, u8 key_idx) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 854 | { |
| 855 | struct ieee80211_local *local = sdata->local; |
| 856 | struct sk_buff *skb; |
| 857 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 858 | int err; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 859 | |
| 860 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
Jouni Malinen | 65fc73a | 2009-03-20 21:21:16 +0200 | [diff] [blame] | 861 | sizeof(*mgmt) + 6 + extra_len); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 862 | if (!skb) { |
| 863 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 864 | "frame\n", sdata->name); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 865 | return; |
| 866 | } |
| 867 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 868 | |
| 869 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); |
| 870 | memset(mgmt, 0, 24 + 6); |
| 871 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 872 | IEEE80211_STYPE_AUTH); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 873 | memcpy(mgmt->da, bssid, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 874 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 875 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
| 876 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); |
| 877 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); |
| 878 | mgmt->u.auth.status_code = cpu_to_le16(0); |
| 879 | if (extra) |
| 880 | memcpy(skb_put(skb, extra_len), extra, extra_len); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 881 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 882 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
| 883 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| 884 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); |
| 885 | WARN_ON(err); |
| 886 | } |
| 887 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 888 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 889 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 890 | } |
| 891 | |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 892 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
Johannes Berg | 4d36ec58 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 893 | const u8 *ie, size_t ie_len, |
| 894 | enum ieee80211_band band) |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 895 | { |
| 896 | struct ieee80211_supported_band *sband; |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 897 | u8 *pos; |
| 898 | size_t offset = 0, noffset; |
| 899 | int supp_rates_len, i; |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 900 | |
Johannes Berg | 4d36ec58 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 901 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 902 | |
| 903 | pos = buffer; |
| 904 | |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 905 | supp_rates_len = min_t(int, sband->n_bitrates, 8); |
| 906 | |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 907 | *pos++ = WLAN_EID_SUPP_RATES; |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 908 | *pos++ = supp_rates_len; |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 909 | |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 910 | for (i = 0; i < supp_rates_len; i++) { |
| 911 | int rate = sband->bitrates[i].bitrate; |
| 912 | *pos++ = (u8) (rate / 5); |
| 913 | } |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 914 | |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 915 | /* insert "request information" if in custom IEs */ |
| 916 | if (ie && ie_len) { |
| 917 | static const u8 before_extrates[] = { |
| 918 | WLAN_EID_SSID, |
| 919 | WLAN_EID_SUPP_RATES, |
| 920 | WLAN_EID_REQUEST, |
| 921 | }; |
| 922 | noffset = ieee80211_ie_split(ie, ie_len, |
| 923 | before_extrates, |
| 924 | ARRAY_SIZE(before_extrates), |
| 925 | offset); |
| 926 | memcpy(pos, ie + offset, noffset - offset); |
| 927 | pos += noffset - offset; |
| 928 | offset = noffset; |
| 929 | } |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 930 | |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 931 | if (sband->n_bitrates > i) { |
| 932 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 933 | *pos++ = sband->n_bitrates - i; |
| 934 | |
| 935 | for (; i < sband->n_bitrates; i++) { |
| 936 | int rate = sband->bitrates[i].bitrate; |
| 937 | *pos++ = (u8) (rate / 5); |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | /* insert custom IEs that go before HT */ |
| 942 | if (ie && ie_len) { |
| 943 | static const u8 before_ht[] = { |
| 944 | WLAN_EID_SSID, |
| 945 | WLAN_EID_SUPP_RATES, |
| 946 | WLAN_EID_REQUEST, |
| 947 | WLAN_EID_EXT_SUPP_RATES, |
| 948 | WLAN_EID_DS_PARAMS, |
| 949 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| 950 | }; |
| 951 | noffset = ieee80211_ie_split(ie, ie_len, |
| 952 | before_ht, ARRAY_SIZE(before_ht), |
| 953 | offset); |
| 954 | memcpy(pos, ie + offset, noffset - offset); |
| 955 | pos += noffset - offset; |
| 956 | offset = noffset; |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 957 | } |
| 958 | |
Johannes Berg | 5ef2d41 | 2009-03-31 12:12:07 +0200 | [diff] [blame] | 959 | if (sband->ht_cap.ht_supported) { |
Johannes Berg | f38fd12 | 2009-12-01 18:29:42 +0100 | [diff] [blame] | 960 | u16 cap = sband->ht_cap.cap; |
| 961 | __le16 tmp; |
| 962 | |
| 963 | if (ieee80211_disable_40mhz_24ghz && |
| 964 | sband->band == IEEE80211_BAND_2GHZ) { |
| 965 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
| 966 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
| 967 | } |
Johannes Berg | 5ef2d41 | 2009-03-31 12:12:07 +0200 | [diff] [blame] | 968 | |
| 969 | *pos++ = WLAN_EID_HT_CAPABILITY; |
| 970 | *pos++ = sizeof(struct ieee80211_ht_cap); |
| 971 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); |
Johannes Berg | f38fd12 | 2009-12-01 18:29:42 +0100 | [diff] [blame] | 972 | tmp = cpu_to_le16(cap); |
Johannes Berg | 5ef2d41 | 2009-03-31 12:12:07 +0200 | [diff] [blame] | 973 | memcpy(pos, &tmp, sizeof(u16)); |
| 974 | pos += sizeof(u16); |
Johannes Berg | 5ef2d41 | 2009-03-31 12:12:07 +0200 | [diff] [blame] | 975 | *pos++ = sband->ht_cap.ampdu_factor | |
Johannes Berg | f38fd12 | 2009-12-01 18:29:42 +0100 | [diff] [blame] | 976 | (sband->ht_cap.ampdu_density << |
| 977 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); |
Johannes Berg | 5ef2d41 | 2009-03-31 12:12:07 +0200 | [diff] [blame] | 978 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); |
| 979 | pos += sizeof(sband->ht_cap.mcs); |
| 980 | pos += 2 + 4 + 1; /* ext info, BF cap, antsel */ |
| 981 | } |
| 982 | |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 983 | /* |
| 984 | * If adding more here, adjust code in main.c |
| 985 | * that calculates local->scan_ies_len. |
| 986 | */ |
| 987 | |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 988 | /* add any remaining custom IEs */ |
| 989 | if (ie && ie_len) { |
| 990 | noffset = ie_len; |
| 991 | memcpy(pos, ie + offset, noffset - offset); |
| 992 | pos += noffset - offset; |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | return pos - buffer; |
| 996 | } |
| 997 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 998 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
Johannes Berg | de95a54 | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 999 | const u8 *ssid, size_t ssid_len, |
| 1000 | const u8 *ie, size_t ie_len) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1001 | { |
| 1002 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1003 | struct sk_buff *skb; |
| 1004 | struct ieee80211_mgmt *mgmt; |
Kalle Valo | 7c12ce8 | 2010-01-05 20:16:44 +0200 | [diff] [blame] | 1005 | size_t buf_len; |
| 1006 | u8 *buf; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1007 | |
Kalle Valo | 7c12ce8 | 2010-01-05 20:16:44 +0200 | [diff] [blame] | 1008 | /* FIXME: come up with a proper value */ |
| 1009 | buf = kmalloc(200 + ie_len, GFP_KERNEL); |
| 1010 | if (!buf) { |
| 1011 | printk(KERN_DEBUG "%s: failed to allocate temporary IE " |
| 1012 | "buffer\n", sdata->name); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1013 | return; |
| 1014 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1015 | |
Kalle Valo | 7c12ce8 | 2010-01-05 20:16:44 +0200 | [diff] [blame] | 1016 | buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, |
| 1017 | local->hw.conf.channel->band); |
| 1018 | |
| 1019 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, |
| 1020 | ssid, ssid_len, |
| 1021 | buf, buf_len); |
| 1022 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1023 | if (dst) { |
Kalle Valo | 7c12ce8 | 2010-01-05 20:16:44 +0200 | [diff] [blame] | 1024 | mgmt = (struct ieee80211_mgmt *) skb->data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1025 | memcpy(mgmt->da, dst, ETH_ALEN); |
| 1026 | memcpy(mgmt->bssid, dst, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1027 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1028 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 1029 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 1030 | ieee80211_tx_skb(sdata, skb); |
Ming Lei | 145b6d1 | 2010-01-15 21:44:21 +0800 | [diff] [blame] | 1031 | kfree(buf); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, |
| 1035 | struct ieee802_11_elems *elems, |
| 1036 | enum ieee80211_band band) |
| 1037 | { |
| 1038 | struct ieee80211_supported_band *sband; |
| 1039 | struct ieee80211_rate *bitrates; |
| 1040 | size_t num_rates; |
| 1041 | u32 supp_rates; |
| 1042 | int i, j; |
| 1043 | sband = local->hw.wiphy->bands[band]; |
| 1044 | |
| 1045 | if (!sband) { |
| 1046 | WARN_ON(1); |
| 1047 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
| 1048 | } |
| 1049 | |
| 1050 | bitrates = sband->bitrates; |
| 1051 | num_rates = sband->n_bitrates; |
| 1052 | supp_rates = 0; |
| 1053 | for (i = 0; i < elems->supp_rates_len + |
| 1054 | elems->ext_supp_rates_len; i++) { |
| 1055 | u8 rate = 0; |
| 1056 | int own_rate; |
| 1057 | if (i < elems->supp_rates_len) |
| 1058 | rate = elems->supp_rates[i]; |
| 1059 | else if (elems->ext_supp_rates) |
| 1060 | rate = elems->ext_supp_rates |
| 1061 | [i - elems->supp_rates_len]; |
| 1062 | own_rate = 5 * (rate & 0x7f); |
| 1063 | for (j = 0; j < num_rates; j++) |
| 1064 | if (bitrates[j].bitrate == own_rate) |
| 1065 | supp_rates |= BIT(j); |
| 1066 | } |
| 1067 | return supp_rates; |
| 1068 | } |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1069 | |
Johannes Berg | 84f6a01 | 2009-08-20 20:02:20 +0200 | [diff] [blame] | 1070 | void ieee80211_stop_device(struct ieee80211_local *local) |
| 1071 | { |
| 1072 | ieee80211_led_radio(local, false); |
| 1073 | |
| 1074 | cancel_work_sync(&local->reconfig_filter); |
Johannes Berg | 84f6a01 | 2009-08-20 20:02:20 +0200 | [diff] [blame] | 1075 | |
| 1076 | flush_workqueue(local->workqueue); |
Lennert Buytenhek | 678f415 | 2010-01-10 14:07:53 +0100 | [diff] [blame] | 1077 | drv_stop(local); |
Johannes Berg | 84f6a01 | 2009-08-20 20:02:20 +0200 | [diff] [blame] | 1078 | } |
| 1079 | |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1080 | int ieee80211_reconfig(struct ieee80211_local *local) |
| 1081 | { |
| 1082 | struct ieee80211_hw *hw = &local->hw; |
| 1083 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1084 | struct sta_info *sta; |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1085 | int res; |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1086 | |
Johannes Berg | ceb99fe | 2009-11-19 14:29:39 +0100 | [diff] [blame] | 1087 | if (local->suspended) |
| 1088 | local->resuming = true; |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1089 | |
| 1090 | /* restart hardware */ |
| 1091 | if (local->open_count) { |
Luis R. Rodriguez | 24feda0 | 2009-12-24 15:38:22 -0500 | [diff] [blame] | 1092 | /* |
| 1093 | * Upon resume hardware can sometimes be goofy due to |
| 1094 | * various platform / driver / bus issues, so restarting |
| 1095 | * the device may at times not work immediately. Propagate |
| 1096 | * the error. |
| 1097 | */ |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1098 | res = drv_start(local); |
Luis R. Rodriguez | 24feda0 | 2009-12-24 15:38:22 -0500 | [diff] [blame] | 1099 | if (res) { |
John W. Linville | c7a00dc | 2010-03-17 11:28:18 -0400 | [diff] [blame] | 1100 | WARN(local->suspended, "Hardware became unavailable " |
| 1101 | "upon resume. This could be a software issue " |
| 1102 | "prior to suspend or a hardware issue.\n"); |
Luis R. Rodriguez | 24feda0 | 2009-12-24 15:38:22 -0500 | [diff] [blame] | 1103 | return res; |
| 1104 | } |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1105 | |
Johannes Berg | 1f87f7d | 2009-06-02 13:01:41 +0200 | [diff] [blame] | 1106 | ieee80211_led_radio(local, true); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1107 | } |
| 1108 | |
| 1109 | /* add interfaces */ |
| 1110 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1111 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 1112 | sdata->vif.type != NL80211_IFTYPE_MONITOR && |
Johannes Berg | 1ed32e4 | 2009-12-23 13:15:45 +0100 | [diff] [blame] | 1113 | ieee80211_sdata_running(sdata)) |
| 1114 | res = drv_add_interface(local, &sdata->vif); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1115 | } |
| 1116 | |
| 1117 | /* add STAs back */ |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1118 | mutex_lock(&local->sta_mtx); |
| 1119 | list_for_each_entry(sta, &local->sta_list, list) { |
| 1120 | if (sta->uploaded) { |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1121 | sdata = sta->sdata; |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1122 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 1123 | sdata = container_of(sdata->bss, |
| 1124 | struct ieee80211_sub_if_data, |
| 1125 | u.ap); |
| 1126 | |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1127 | WARN_ON(drv_sta_add(local, sdata, &sta->sta)); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1128 | } |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1129 | } |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1130 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1131 | |
| 1132 | /* Clear Suspend state so that ADDBA requests can be processed */ |
| 1133 | |
| 1134 | rcu_read_lock(); |
| 1135 | |
| 1136 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
| 1137 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 1138 | clear_sta_flags(sta, WLAN_STA_SUSPEND); |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | rcu_read_unlock(); |
| 1143 | |
| 1144 | /* setup RTS threshold */ |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1145 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1146 | |
| 1147 | /* reconfigure hardware */ |
| 1148 | ieee80211_hw_config(local, ~0); |
| 1149 | |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1150 | ieee80211_configure_filter(local); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1151 | |
| 1152 | /* Finally also reconfigure all the BSS information */ |
| 1153 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1154 | u32 changed = ~0; |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 1155 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1156 | continue; |
| 1157 | switch (sdata->vif.type) { |
| 1158 | case NL80211_IFTYPE_STATION: |
| 1159 | /* disable beacon change bits */ |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 1160 | changed &= ~(BSS_CHANGED_BEACON | |
| 1161 | BSS_CHANGED_BEACON_ENABLED); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1162 | /* fall through */ |
| 1163 | case NL80211_IFTYPE_ADHOC: |
| 1164 | case NL80211_IFTYPE_AP: |
| 1165 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 1166 | ieee80211_bss_info_change_notify(sdata, changed); |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1167 | break; |
| 1168 | case NL80211_IFTYPE_WDS: |
| 1169 | break; |
| 1170 | case NL80211_IFTYPE_AP_VLAN: |
| 1171 | case NL80211_IFTYPE_MONITOR: |
| 1172 | /* ignore virtual */ |
| 1173 | break; |
| 1174 | case NL80211_IFTYPE_UNSPECIFIED: |
| 1175 | case __NL80211_IFTYPE_AFTER_LAST: |
| 1176 | WARN_ON(1); |
| 1177 | break; |
| 1178 | } |
| 1179 | } |
| 1180 | |
Wey-Yi Guy | 74e2bd1 | 2010-02-03 09:28:55 -0800 | [diff] [blame] | 1181 | rcu_read_lock(); |
| 1182 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
| 1183 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 1184 | ieee80211_sta_tear_down_BA_sessions(sta); |
| 1185 | } |
| 1186 | } |
| 1187 | rcu_read_unlock(); |
| 1188 | |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1189 | /* add back keys */ |
| 1190 | list_for_each_entry(sdata, &local->interfaces, list) |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 1191 | if (ieee80211_sdata_running(sdata)) |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1192 | ieee80211_enable_keys(sdata); |
| 1193 | |
| 1194 | ieee80211_wake_queues_by_reason(hw, |
| 1195 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
| 1196 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1197 | /* |
| 1198 | * If this is for hw restart things are still running. |
| 1199 | * We may want to change that later, however. |
| 1200 | */ |
Johannes Berg | ceb99fe | 2009-11-19 14:29:39 +0100 | [diff] [blame] | 1201 | if (!local->suspended) |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1202 | return 0; |
| 1203 | |
| 1204 | #ifdef CONFIG_PM |
Johannes Berg | ceb99fe | 2009-11-19 14:29:39 +0100 | [diff] [blame] | 1205 | /* first set suspended false, then resuming */ |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1206 | local->suspended = false; |
Johannes Berg | ceb99fe | 2009-11-19 14:29:39 +0100 | [diff] [blame] | 1207 | mb(); |
| 1208 | local->resuming = false; |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1209 | |
| 1210 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1211 | switch(sdata->vif.type) { |
| 1212 | case NL80211_IFTYPE_STATION: |
| 1213 | ieee80211_sta_restart(sdata); |
| 1214 | break; |
| 1215 | case NL80211_IFTYPE_ADHOC: |
| 1216 | ieee80211_ibss_restart(sdata); |
| 1217 | break; |
| 1218 | case NL80211_IFTYPE_MESH_POINT: |
| 1219 | ieee80211_mesh_restart(sdata); |
| 1220 | break; |
| 1221 | default: |
| 1222 | break; |
| 1223 | } |
| 1224 | } |
| 1225 | |
| 1226 | add_timer(&local->sta_cleanup); |
| 1227 | |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1228 | mutex_lock(&local->sta_mtx); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1229 | list_for_each_entry(sta, &local->sta_list, list) |
| 1230 | mesh_plink_restart(sta); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1231 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1232 | #else |
| 1233 | WARN_ON(1); |
| 1234 | #endif |
Johannes Berg | f2753dd | 2009-04-14 10:09:24 +0200 | [diff] [blame] | 1235 | return 0; |
| 1236 | } |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 1237 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 1238 | static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
| 1239 | enum ieee80211_smps_mode *smps_mode) |
| 1240 | { |
| 1241 | if (ifmgd->associated) { |
| 1242 | *smps_mode = ifmgd->ap_smps; |
| 1243 | |
| 1244 | if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { |
| 1245 | if (ifmgd->powersave) |
| 1246 | *smps_mode = IEEE80211_SMPS_DYNAMIC; |
| 1247 | else |
| 1248 | *smps_mode = IEEE80211_SMPS_OFF; |
| 1249 | } |
| 1250 | |
| 1251 | return 1; |
| 1252 | } |
| 1253 | |
| 1254 | return 0; |
| 1255 | } |
| 1256 | |
| 1257 | /* must hold iflist_mtx */ |
| 1258 | void ieee80211_recalc_smps(struct ieee80211_local *local, |
| 1259 | struct ieee80211_sub_if_data *forsdata) |
| 1260 | { |
| 1261 | struct ieee80211_sub_if_data *sdata; |
| 1262 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; |
| 1263 | int count = 0; |
| 1264 | |
| 1265 | if (forsdata) |
| 1266 | WARN_ON(!mutex_is_locked(&forsdata->u.mgd.mtx)); |
| 1267 | |
| 1268 | WARN_ON(!mutex_is_locked(&local->iflist_mtx)); |
| 1269 | |
| 1270 | /* |
| 1271 | * This function could be improved to handle multiple |
| 1272 | * interfaces better, but right now it makes any |
| 1273 | * non-station interfaces force SM PS to be turned |
| 1274 | * off. If there are multiple station interfaces it |
| 1275 | * could also use the best possible mode, e.g. if |
| 1276 | * one is in static and the other in dynamic then |
| 1277 | * dynamic is ok. |
| 1278 | */ |
| 1279 | |
| 1280 | list_for_each_entry(sdata, &local->interfaces, list) { |
| 1281 | if (!netif_running(sdata->dev)) |
| 1282 | continue; |
| 1283 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 1284 | goto set; |
| 1285 | if (sdata != forsdata) { |
| 1286 | /* |
| 1287 | * This nested is ok -- we are holding the iflist_mtx |
| 1288 | * so can't get here twice or so. But it's required |
| 1289 | * since normally we acquire it first and then the |
| 1290 | * iflist_mtx. |
| 1291 | */ |
| 1292 | mutex_lock_nested(&sdata->u.mgd.mtx, SINGLE_DEPTH_NESTING); |
| 1293 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); |
| 1294 | mutex_unlock(&sdata->u.mgd.mtx); |
| 1295 | } else |
| 1296 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); |
| 1297 | |
| 1298 | if (count > 1) { |
| 1299 | smps_mode = IEEE80211_SMPS_OFF; |
| 1300 | break; |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | if (smps_mode == local->smps_mode) |
| 1305 | return; |
| 1306 | |
| 1307 | set: |
| 1308 | local->smps_mode = smps_mode; |
| 1309 | /* changed flag is auto-detected for this */ |
| 1310 | ieee80211_hw_config(local, 0); |
| 1311 | } |
Johannes Berg | 8e664fb | 2009-12-23 13:15:38 +0100 | [diff] [blame] | 1312 | |
| 1313 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) |
| 1314 | { |
| 1315 | int i; |
| 1316 | |
| 1317 | for (i = 0; i < n_ids; i++) |
| 1318 | if (ids[i] == id) |
| 1319 | return true; |
| 1320 | return false; |
| 1321 | } |
| 1322 | |
| 1323 | /** |
| 1324 | * ieee80211_ie_split - split an IE buffer according to ordering |
| 1325 | * |
| 1326 | * @ies: the IE buffer |
| 1327 | * @ielen: the length of the IE buffer |
| 1328 | * @ids: an array with element IDs that are allowed before |
| 1329 | * the split |
| 1330 | * @n_ids: the size of the element ID array |
| 1331 | * @offset: offset where to start splitting in the buffer |
| 1332 | * |
| 1333 | * This function splits an IE buffer by updating the @offset |
| 1334 | * variable to point to the location where the buffer should be |
| 1335 | * split. |
| 1336 | * |
| 1337 | * It assumes that the given IE buffer is well-formed, this |
| 1338 | * has to be guaranteed by the caller! |
| 1339 | * |
| 1340 | * It also assumes that the IEs in the buffer are ordered |
| 1341 | * correctly, if not the result of using this function will not |
| 1342 | * be ordered correctly either, i.e. it does no reordering. |
| 1343 | * |
| 1344 | * The function returns the offset where the next part of the |
| 1345 | * buffer starts, which may be @ielen if the entire (remainder) |
| 1346 | * of the buffer should be used. |
| 1347 | */ |
| 1348 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, |
| 1349 | const u8 *ids, int n_ids, size_t offset) |
| 1350 | { |
| 1351 | size_t pos = offset; |
| 1352 | |
| 1353 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) |
| 1354 | pos += 2 + ies[pos + 1]; |
| 1355 | |
| 1356 | return pos; |
| 1357 | } |
| 1358 | |
| 1359 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) |
| 1360 | { |
| 1361 | size_t pos = offset; |
| 1362 | |
| 1363 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) |
| 1364 | pos += 2 + ies[pos + 1]; |
| 1365 | |
| 1366 | return pos; |
| 1367 | } |