Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +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> |
Johannes Berg | d98ad83 | 2014-09-03 15:24:57 +0300 | [diff] [blame] | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * |
| 13 | * Transmit and frame generation functions. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/bitmap.h> |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 21 | #include <linux/rcupdate.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 22 | #include <linux/export.h> |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 23 | #include <net/net_namespace.h> |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 24 | #include <net/ieee80211_radiotap.h> |
| 25 | #include <net/cfg80211.h> |
| 26 | #include <net/mac80211.h> |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 27 | #include <net/codel.h> |
| 28 | #include <net/codel_impl.h> |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 29 | #include <asm/unaligned.h> |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 30 | #include <net/fq_impl.h> |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 31 | |
| 32 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 33 | #include "driver-ops.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 34 | #include "led.h" |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 35 | #include "mesh.h" |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 36 | #include "wep.h" |
| 37 | #include "wpa.h" |
| 38 | #include "wme.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 39 | #include "rate.h" |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 40 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 41 | /* misc utils */ |
| 42 | |
Johannes Berg | 5a49051 | 2015-04-22 17:10:38 +0200 | [diff] [blame] | 43 | static inline void ieee80211_tx_stats(struct net_device *dev, u32 len) |
| 44 | { |
| 45 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); |
| 46 | |
| 47 | u64_stats_update_begin(&tstats->syncp); |
| 48 | tstats->tx_packets++; |
| 49 | tstats->tx_bytes += len; |
| 50 | u64_stats_update_end(&tstats->syncp); |
| 51 | } |
| 52 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 53 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
| 54 | struct sk_buff *skb, int group_addr, |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 55 | int next_frag_len) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 56 | { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 57 | int rate, mrate, erp, dur, i, shift = 0; |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 58 | struct ieee80211_rate *txrate; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 59 | struct ieee80211_local *local = tx->local; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 60 | struct ieee80211_supported_band *sband; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 61 | struct ieee80211_hdr *hdr; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 62 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 63 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 64 | u32 rate_flags = 0; |
| 65 | |
| 66 | rcu_read_lock(); |
| 67 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); |
| 68 | if (chanctx_conf) { |
| 69 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); |
| 70 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); |
| 71 | } |
| 72 | rcu_read_unlock(); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 73 | |
| 74 | /* assume HW handles this */ |
Felix Fietkau | 336004e | 2014-11-21 23:29:14 +0100 | [diff] [blame] | 75 | if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)) |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 76 | return 0; |
| 77 | |
| 78 | /* uh huh? */ |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 79 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 80 | return 0; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 81 | |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 82 | sband = local->hw.wiphy->bands[info->band]; |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 83 | txrate = &sband->bitrates[tx->rate.idx]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 84 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 85 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 86 | |
| 87 | /* |
| 88 | * data and mgmt (except PS Poll): |
| 89 | * - during CFP: 32768 |
| 90 | * - during contention period: |
| 91 | * if addr1 is group address: 0 |
| 92 | * if more fragments = 0 and addr1 is individual address: time to |
| 93 | * transmit one ACK plus SIFS |
| 94 | * if more fragments = 1 and addr1 is individual address: time to |
| 95 | * transmit next fragment plus 2 x ACK plus 3 x SIFS |
| 96 | * |
| 97 | * IEEE 802.11, 9.6: |
| 98 | * - control response frame (CTS or ACK) shall be transmitted using the |
| 99 | * same rate as the immediately previous frame in the frame exchange |
| 100 | * sequence, if this rate belongs to the PHY mandatory rates, or else |
| 101 | * at the highest possible rate belonging to the PHY rates in the |
| 102 | * BSSBasicRateSet |
| 103 | */ |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 104 | hdr = (struct ieee80211_hdr *)skb->data; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 105 | if (ieee80211_is_ctl(hdr->frame_control)) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 106 | /* TODO: These control frames are not currently sent by |
Johannes Berg | ccd7b36 | 2008-09-11 00:01:56 +0200 | [diff] [blame] | 107 | * mac80211, but should they be implemented, this function |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 108 | * needs to be updated to support duration field calculation. |
| 109 | * |
| 110 | * RTS: time needed to transmit pending data/mgmt frame plus |
| 111 | * one CTS frame plus one ACK frame plus 3 x SIFS |
| 112 | * CTS: duration of immediately previous RTS minus time |
| 113 | * required to transmit CTS and its SIFS |
| 114 | * ACK: 0 if immediately previous directed data/mgmt had |
| 115 | * more=0, with more=1 duration in ACK frame is duration |
| 116 | * from previous frame minus time needed to transmit ACK |
| 117 | * and its SIFS |
| 118 | * PS Poll: BIT(15) | BIT(14) | aid |
| 119 | */ |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | /* data/mgmt */ |
| 124 | if (0 /* FIX: data/mgmt during CFP */) |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 125 | return cpu_to_le16(32768); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 126 | |
| 127 | if (group_addr) /* Group address as the destination - no ACK */ |
| 128 | return 0; |
| 129 | |
| 130 | /* Individual destination address: |
| 131 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) |
| 132 | * CTS and ACK frames shall be transmitted using the highest rate in |
| 133 | * basic rate set that is less than or equal to the rate of the |
| 134 | * immediately previous frame and that is using the same modulation |
| 135 | * (CCK or OFDM). If no basic rate set matches with these requirements, |
| 136 | * the highest mandatory rate of the PHY that is less than or equal to |
| 137 | * the rate of the previous frame is used. |
| 138 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps |
| 139 | */ |
| 140 | rate = -1; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 141 | /* use lowest available if everything fails */ |
| 142 | mrate = sband->bitrates[0].bitrate; |
| 143 | for (i = 0; i < sband->n_bitrates; i++) { |
| 144 | struct ieee80211_rate *r = &sband->bitrates[i]; |
| 145 | |
| 146 | if (r->bitrate > txrate->bitrate) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 147 | break; |
| 148 | |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 149 | if ((rate_flags & r->flags) != rate_flags) |
| 150 | continue; |
| 151 | |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 152 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 153 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 154 | |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 155 | switch (sband->band) { |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 156 | case NL80211_BAND_2GHZ: { |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 157 | u32 flag; |
| 158 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| 159 | flag = IEEE80211_RATE_MANDATORY_G; |
| 160 | else |
| 161 | flag = IEEE80211_RATE_MANDATORY_B; |
| 162 | if (r->flags & flag) |
| 163 | mrate = r->bitrate; |
| 164 | break; |
| 165 | } |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 166 | case NL80211_BAND_5GHZ: |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 167 | if (r->flags & IEEE80211_RATE_MANDATORY_A) |
| 168 | mrate = r->bitrate; |
| 169 | break; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 170 | case NL80211_BAND_60GHZ: |
Vladimir Kondratiev | 3a0c52a | 2012-07-02 09:32:32 +0300 | [diff] [blame] | 171 | /* TODO, for now fall through */ |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 172 | case NUM_NL80211_BANDS: |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 173 | WARN_ON(1); |
| 174 | break; |
| 175 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 176 | } |
| 177 | if (rate == -1) { |
| 178 | /* No matching basic rate found; use highest suitable mandatory |
| 179 | * PHY rate */ |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 180 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 181 | } |
| 182 | |
Simon Wunderlich | 6674f21 | 2011-11-21 21:34:30 +0100 | [diff] [blame] | 183 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
| 184 | if (ieee80211_is_data_qos(hdr->frame_control) && |
Claudio Pisa | c26a0e1 | 2012-05-28 13:06:25 +0100 | [diff] [blame] | 185 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
Simon Wunderlich | 6674f21 | 2011-11-21 21:34:30 +0100 | [diff] [blame] | 186 | dur = 0; |
| 187 | else |
| 188 | /* Time needed to transmit ACK |
| 189 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up |
| 190 | * to closest integer */ |
Michal Kazior | 4ee73f3 | 2012-04-11 08:47:56 +0200 | [diff] [blame] | 191 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
Simon Wunderlich | 438b61b | 2013-07-08 16:55:51 +0200 | [diff] [blame] | 192 | tx->sdata->vif.bss_conf.use_short_preamble, |
| 193 | shift); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 194 | |
| 195 | if (next_frag_len) { |
| 196 | /* Frame is fragmented: duration increases with time needed to |
| 197 | * transmit next fragment plus ACK and 2 x SIFS. */ |
| 198 | dur *= 2; /* ACK + SIFS */ |
| 199 | /* next fragment */ |
Michal Kazior | 4ee73f3 | 2012-04-11 08:47:56 +0200 | [diff] [blame] | 200 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 201 | txrate->bitrate, erp, |
Simon Wunderlich | 438b61b | 2013-07-08 16:55:51 +0200 | [diff] [blame] | 202 | tx->sdata->vif.bss_conf.use_short_preamble, |
| 203 | shift); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 204 | } |
| 205 | |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 206 | return cpu_to_le16(dur); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 207 | } |
| 208 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 209 | /* tx handlers */ |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 210 | static ieee80211_tx_result debug_noinline |
| 211 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) |
| 212 | { |
| 213 | struct ieee80211_local *local = tx->local; |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 214 | struct ieee80211_if_managed *ifmgd; |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 215 | |
| 216 | /* driver doesn't support power save */ |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 217 | if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 218 | return TX_CONTINUE; |
| 219 | |
| 220 | /* hardware does dynamic power save */ |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 221 | if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 222 | return TX_CONTINUE; |
| 223 | |
| 224 | /* dynamic power save disabled */ |
| 225 | if (local->hw.conf.dynamic_ps_timeout <= 0) |
| 226 | return TX_CONTINUE; |
| 227 | |
| 228 | /* we are scanning, don't enable power save */ |
| 229 | if (local->scanning) |
| 230 | return TX_CONTINUE; |
| 231 | |
| 232 | if (!local->ps_sdata) |
| 233 | return TX_CONTINUE; |
| 234 | |
| 235 | /* No point if we're going to suspend */ |
| 236 | if (local->quiescing) |
| 237 | return TX_CONTINUE; |
| 238 | |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 239 | /* dynamic ps is supported only in managed mode */ |
| 240 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) |
| 241 | return TX_CONTINUE; |
| 242 | |
| 243 | ifmgd = &tx->sdata->u.mgd; |
| 244 | |
| 245 | /* |
| 246 | * Don't wakeup from power save if u-apsd is enabled, voip ac has |
| 247 | * u-apsd enabled and the frame is in voip class. This effectively |
| 248 | * means that even if all access categories have u-apsd enabled, in |
| 249 | * practise u-apsd is only used with the voip ac. This is a |
| 250 | * workaround for the case when received voip class packets do not |
| 251 | * have correct qos tag for some reason, due the network or the |
| 252 | * peer application. |
| 253 | * |
Eliad Peller | dc41e4d | 2012-03-14 16:15:03 +0200 | [diff] [blame] | 254 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 255 | * changed via debugfs, user needs to reassociate manually to have |
| 256 | * everything in sync. |
| 257 | */ |
Johannes Berg | 4875d30d | 2012-03-27 14:18:37 +0200 | [diff] [blame] | 258 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
| 259 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && |
| 260 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 261 | return TX_CONTINUE; |
| 262 | |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 263 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| 264 | ieee80211_stop_queues_by_reason(&local->hw, |
Johannes Berg | 445ea4e | 2013-02-13 12:25:28 +0100 | [diff] [blame] | 265 | IEEE80211_MAX_QUEUE_MAP, |
Luciano Coelho | cca07b0 | 2014-06-13 16:30:05 +0300 | [diff] [blame] | 266 | IEEE80211_QUEUE_STOP_REASON_PS, |
| 267 | false); |
Vivek Natarajan | db28569 | 2011-02-18 17:18:03 +0530 | [diff] [blame] | 268 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 269 | ieee80211_queue_work(&local->hw, |
| 270 | &local->dynamic_ps_disable_work); |
| 271 | } |
| 272 | |
Luciano Coelho | 5db1c07 | 2011-05-03 21:40:08 +0300 | [diff] [blame] | 273 | /* Don't restart the timer if we're not disassociated */ |
| 274 | if (!ifmgd->associated) |
| 275 | return TX_CONTINUE; |
| 276 | |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 277 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 278 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); |
| 279 | |
| 280 | return TX_CONTINUE; |
| 281 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 282 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 283 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 284 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 285 | { |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 286 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 287 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 288 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 289 | bool assoc = false; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 290 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 291 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 292 | return TX_CONTINUE; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 293 | |
Ben Greear | b23b025 | 2011-02-04 11:54:17 -0800 | [diff] [blame] | 294 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
| 295 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && |
Kalle Valo | a9a6fff | 2009-03-18 14:06:44 +0200 | [diff] [blame] | 296 | !ieee80211_is_probe_req(hdr->frame_control) && |
| 297 | !ieee80211_is_nullfunc(hdr->frame_control)) |
| 298 | /* |
| 299 | * When software scanning only nullfunc frames (to notify |
| 300 | * the sleep state to the AP) and probe requests (for the |
| 301 | * active scan) are allowed, all other frames should not be |
| 302 | * sent and we should not get here, but if we do |
| 303 | * nonetheless, drop them to avoid sending them |
| 304 | * off-channel. See the link below and |
| 305 | * ieee80211_start_scan() for more. |
| 306 | * |
| 307 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 |
| 308 | */ |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 309 | return TX_DROP; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 310 | |
Rostislav Lisovy | 239281f | 2014-11-03 10:33:19 +0100 | [diff] [blame] | 311 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
| 312 | return TX_CONTINUE; |
| 313 | |
Bill Jordan | 1be7fe8 | 2010-10-01 11:20:41 -0400 | [diff] [blame] | 314 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
| 315 | return TX_CONTINUE; |
| 316 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 317 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 318 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 319 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 320 | if (tx->sta) |
| 321 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 322 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 323 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 324 | if (unlikely(!assoc && |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 325 | ieee80211_is_data(hdr->frame_control))) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 326 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 327 | sdata_info(tx->sdata, |
| 328 | "dropped data frame to not associated station %pM\n", |
| 329 | hdr->addr1); |
| 330 | #endif |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 331 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 332 | return TX_DROP; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 333 | } |
Johannes Berg | 2962389 | 2011-12-14 12:20:31 +0100 | [diff] [blame] | 334 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 335 | ieee80211_is_data(hdr->frame_control) && |
Felix Fietkau | 030ef8f | 2012-04-23 19:49:02 +0200 | [diff] [blame] | 336 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
Johannes Berg | 2962389 | 2011-12-14 12:20:31 +0100 | [diff] [blame] | 337 | /* |
| 338 | * No associated STAs - no need to send multicast |
| 339 | * frames. |
| 340 | */ |
| 341 | return TX_DROP; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 342 | } |
| 343 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 344 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 345 | } |
| 346 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 347 | /* This function is called whenever the AP is about to exceed the maximum limit |
| 348 | * of buffered frames for power saving STAs. This situation should not really |
| 349 | * happen often during normal operation, so dropping the oldest buffered packet |
| 350 | * from each queue should be OK to make some room for new frames. */ |
| 351 | static void purge_old_ps_buffers(struct ieee80211_local *local) |
| 352 | { |
| 353 | int total = 0, purged = 0; |
| 354 | struct sk_buff *skb; |
| 355 | struct ieee80211_sub_if_data *sdata; |
| 356 | struct sta_info *sta; |
| 357 | |
Johannes Berg | 7901042 | 2007-09-18 17:29:21 -0400 | [diff] [blame] | 358 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 359 | struct ps_data *ps; |
| 360 | |
| 361 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 362 | ps = &sdata->u.ap.ps; |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 363 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 364 | ps = &sdata->u.mesh.ps; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 365 | else |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 366 | continue; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 367 | |
| 368 | skb = skb_dequeue(&ps->bc_buf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 369 | if (skb) { |
| 370 | purged++; |
Felix Fietkau | 6b07d9c | 2016-08-02 11:13:41 +0200 | [diff] [blame] | 371 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 372 | } |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 373 | total += skb_queue_len(&ps->bc_buf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 374 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 375 | |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 376 | /* |
| 377 | * Drop one frame from each station from the lowest-priority |
| 378 | * AC that has frames at all. |
| 379 | */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 380 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 381 | int ac; |
| 382 | |
| 383 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { |
| 384 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); |
| 385 | total += skb_queue_len(&sta->ps_tx_buf[ac]); |
| 386 | if (skb) { |
| 387 | purged++; |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 388 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 389 | break; |
| 390 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 391 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 392 | } |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 393 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 394 | local->total_ps_buffered = total; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 395 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 396 | } |
| 397 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 398 | static ieee80211_tx_result |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 399 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 400 | { |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 401 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 402 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 403 | struct ps_data *ps; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 404 | |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 405 | /* |
| 406 | * broadcast/multicast frame |
| 407 | * |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 408 | * If any of the associated/peer stations is in power save mode, |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 409 | * the frame is buffered to be sent after DTIM beacon frame. |
| 410 | * This is done either by the hardware or us. |
| 411 | */ |
| 412 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 413 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 414 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
| 415 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
| 416 | if (!tx->sdata->bss) |
| 417 | return TX_CONTINUE; |
| 418 | |
| 419 | ps = &tx->sdata->bss->ps; |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 420 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
| 421 | ps = &tx->sdata->u.mesh.ps; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 422 | } else { |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 423 | return TX_CONTINUE; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 426 | |
| 427 | /* no buffering for ordered frames */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 428 | if (ieee80211_has_order(hdr->frame_control)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 429 | return TX_CONTINUE; |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 430 | |
Johannes Berg | 08b9939 | 2014-07-07 12:01:11 +0200 | [diff] [blame] | 431 | if (ieee80211_is_probe_req(hdr->frame_control)) |
| 432 | return TX_CONTINUE; |
| 433 | |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 434 | if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL)) |
Johannes Berg | f4d5794 | 2013-05-28 17:24:15 +0200 | [diff] [blame] | 435 | info->hw_queue = tx->sdata->vif.cab_queue; |
| 436 | |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 437 | /* no stations in PS mode */ |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 438 | if (!atomic_read(&ps->num_sta_ps)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 439 | return TX_CONTINUE; |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 440 | |
Johannes Berg | 62b517c | 2009-10-29 12:19:21 +0100 | [diff] [blame] | 441 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 442 | |
Johannes Berg | 62b517c | 2009-10-29 12:19:21 +0100 | [diff] [blame] | 443 | /* device releases frame after DTIM beacon */ |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 444 | if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING)) |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 445 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 446 | |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 447 | /* buffered in mac80211 */ |
| 448 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
| 449 | purge_old_ps_buffers(tx->local); |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 450 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 451 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 452 | ps_dbg(tx->sdata, |
| 453 | "BC TX buffer full - dropping the oldest frame\n"); |
Felix Fietkau | 6b07d9c | 2016-08-02 11:13:41 +0200 | [diff] [blame] | 454 | ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf)); |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 455 | } else |
| 456 | tx->local->total_ps_buffered++; |
| 457 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 458 | skb_queue_tail(&ps->bc_buf, tx->skb); |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 459 | |
| 460 | return TX_QUEUED; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 461 | } |
| 462 | |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 463 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
| 464 | struct sk_buff *skb) |
| 465 | { |
| 466 | if (!ieee80211_is_mgmt(fc)) |
| 467 | return 0; |
| 468 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 469 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 470 | return 0; |
| 471 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 472 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 473 | return 0; |
| 474 | |
| 475 | return 1; |
| 476 | } |
| 477 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 478 | static ieee80211_tx_result |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 479 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 480 | { |
| 481 | struct sta_info *sta = tx->sta; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 482 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Johannes Berg | 08b9939 | 2014-07-07 12:01:11 +0200 | [diff] [blame] | 483 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Juuso Oikarinen | 3393a60 | 2010-04-19 10:12:52 +0300 | [diff] [blame] | 484 | struct ieee80211_local *local = tx->local; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 485 | |
Johannes Berg | 02f2f1a | 2012-02-27 12:18:30 +0100 | [diff] [blame] | 486 | if (unlikely(!sta)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 487 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 488 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 489 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
Johannes Berg | 5ac2e35 | 2014-05-27 16:32:27 +0200 | [diff] [blame] | 490 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
| 491 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && |
Johannes Berg | 02f2f1a | 2012-02-27 12:18:30 +0100 | [diff] [blame] | 492 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 493 | int ac = skb_get_queue_mapping(tx->skb); |
| 494 | |
Johannes Berg | 08b9939 | 2014-07-07 12:01:11 +0200 | [diff] [blame] | 495 | if (ieee80211_is_mgmt(hdr->frame_control) && |
| 496 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { |
| 497 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; |
| 498 | return TX_CONTINUE; |
| 499 | } |
| 500 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 501 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
| 502 | sta->sta.addr, sta->sta.aid, ac); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 503 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
| 504 | purge_old_ps_buffers(tx->local); |
Emmanuel Grumbach | 1d147bf | 2014-02-20 09:22:11 +0200 | [diff] [blame] | 505 | |
| 506 | /* sync with ieee80211_sta_ps_deliver_wakeup */ |
| 507 | spin_lock(&sta->ps_lock); |
| 508 | /* |
| 509 | * STA woke up the meantime and all the frames on ps_tx_buf have |
| 510 | * been queued to pending queue. No reordering can happen, go |
| 511 | * ahead and Tx the packet. |
| 512 | */ |
| 513 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
Johannes Berg | 5ac2e35 | 2014-05-27 16:32:27 +0200 | [diff] [blame] | 514 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
| 515 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { |
Emmanuel Grumbach | 1d147bf | 2014-02-20 09:22:11 +0200 | [diff] [blame] | 516 | spin_unlock(&sta->ps_lock); |
| 517 | return TX_CONTINUE; |
| 518 | } |
| 519 | |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 520 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
| 521 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 522 | ps_dbg(tx->sdata, |
| 523 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", |
| 524 | sta->sta.addr, ac); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 525 | ieee80211_free_txskb(&local->hw, old); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 526 | } else |
| 527 | tx->local->total_ps_buffered++; |
Johannes Berg | 004c872 | 2008-02-20 11:21:35 +0100 | [diff] [blame] | 528 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 529 | info->control.jiffies = jiffies; |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 530 | info->control.vif = &tx->sdata->vif; |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 531 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
Johannes Berg | 03c8c06 | 2014-01-09 01:45:28 +0100 | [diff] [blame] | 532 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 533 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
Emmanuel Grumbach | 1d147bf | 2014-02-20 09:22:11 +0200 | [diff] [blame] | 534 | spin_unlock(&sta->ps_lock); |
Juuso Oikarinen | 3393a60 | 2010-04-19 10:12:52 +0300 | [diff] [blame] | 535 | |
| 536 | if (!timer_pending(&local->sta_cleanup)) |
| 537 | mod_timer(&local->sta_cleanup, |
| 538 | round_jiffies(jiffies + |
| 539 | STA_INFO_CLEANUP_INTERVAL)); |
| 540 | |
Johannes Berg | c868cb35 | 2011-09-29 16:04:27 +0200 | [diff] [blame] | 541 | /* |
| 542 | * We queued up some frames, so the TIM bit might |
| 543 | * need to be set, recalculate it. |
| 544 | */ |
| 545 | sta_info_recalc_tim(sta); |
| 546 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 547 | return TX_QUEUED; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 548 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
| 549 | ps_dbg(tx->sdata, |
| 550 | "STA %pM in PS mode, but polling/in SP -> send frame\n", |
| 551 | sta->sta.addr); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 552 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 553 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 554 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 555 | } |
| 556 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 557 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 558 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 559 | { |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 560 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 561 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 562 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 563 | if (tx->flags & IEEE80211_TX_UNICAST) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 564 | return ieee80211_tx_h_unicast_ps_buf(tx); |
| 565 | else |
| 566 | return ieee80211_tx_h_multicast_ps_buf(tx); |
| 567 | } |
| 568 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 569 | static ieee80211_tx_result debug_noinline |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 570 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) |
| 571 | { |
| 572 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
| 573 | |
Johannes Berg | af61a16 | 2013-07-02 18:09:12 +0200 | [diff] [blame] | 574 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
| 575 | if (tx->sdata->control_port_no_encrypt) |
| 576 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 577 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; |
Jouni Malinen | 9c1c98a | 2015-02-26 15:50:50 +0200 | [diff] [blame] | 578 | info->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
Johannes Berg | af61a16 | 2013-07-02 18:09:12 +0200 | [diff] [blame] | 579 | } |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 580 | |
| 581 | return TX_CONTINUE; |
| 582 | } |
| 583 | |
| 584 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 585 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 586 | { |
Johannes Berg | 46e6de1 | 2012-07-04 18:10:07 +0200 | [diff] [blame] | 587 | struct ieee80211_key *key; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 588 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 589 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 590 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 591 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 592 | tx->key = NULL; |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 593 | else if (tx->sta && |
| 594 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 595 | tx->key = key; |
Masashi Honma | 46f6b06 | 2016-06-22 19:55:20 +0900 | [diff] [blame] | 596 | else if (ieee80211_is_group_privacy_action(tx->skb) && |
| 597 | (key = rcu_dereference(tx->sdata->default_multicast_key))) |
| 598 | tx->key = key; |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 599 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
Jouni Malinen | ecbcd32 | 2010-03-29 23:35:23 -0700 | [diff] [blame] | 600 | is_multicast_ether_addr(hdr->addr1) && |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 601 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 602 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
| 603 | tx->key = key; |
Johannes Berg | f7e0104 | 2010-12-09 19:49:02 +0100 | [diff] [blame] | 604 | else if (is_multicast_ether_addr(hdr->addr1) && |
| 605 | (key = rcu_dereference(tx->sdata->default_multicast_key))) |
| 606 | tx->key = key; |
| 607 | else if (!is_multicast_ether_addr(hdr->addr1) && |
| 608 | (key = rcu_dereference(tx->sdata->default_unicast_key))) |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 609 | tx->key = key; |
Johannes Berg | e8f4fb7 | 2015-03-20 11:37:36 +0100 | [diff] [blame] | 610 | else |
Johannes Berg | 46e6de1 | 2012-07-04 18:10:07 +0200 | [diff] [blame] | 611 | tx->key = NULL; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 612 | |
| 613 | if (tx->key) { |
Johannes Berg | 813d766 | 2010-01-17 01:47:58 +0100 | [diff] [blame] | 614 | bool skip_hw = false; |
| 615 | |
Johannes Berg | 011bfcc | 2007-09-17 01:29:25 -0400 | [diff] [blame] | 616 | /* TODO: add threshold stuff again */ |
Johannes Berg | 176e4f8 | 2007-12-18 15:27:47 +0100 | [diff] [blame] | 617 | |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 618 | switch (tx->key->conf.cipher) { |
| 619 | case WLAN_CIPHER_SUITE_WEP40: |
| 620 | case WLAN_CIPHER_SUITE_WEP104: |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 621 | case WLAN_CIPHER_SUITE_TKIP: |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 622 | if (!ieee80211_is_data_present(hdr->frame_control)) |
Johannes Berg | 176e4f8 | 2007-12-18 15:27:47 +0100 | [diff] [blame] | 623 | tx->key = NULL; |
| 624 | break; |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 625 | case WLAN_CIPHER_SUITE_CCMP: |
Jouni Malinen | 2b2ba0d | 2015-01-24 19:52:07 +0200 | [diff] [blame] | 626 | case WLAN_CIPHER_SUITE_CCMP_256: |
Jouni Malinen | 00b9cfa | 2015-01-24 19:52:06 +0200 | [diff] [blame] | 627 | case WLAN_CIPHER_SUITE_GCMP: |
| 628 | case WLAN_CIPHER_SUITE_GCMP_256: |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 629 | if (!ieee80211_is_data_present(hdr->frame_control) && |
| 630 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, |
Masashi Honma | 46f6b06 | 2016-06-22 19:55:20 +0900 | [diff] [blame] | 631 | tx->skb) && |
| 632 | !ieee80211_is_group_privacy_action(tx->skb)) |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 633 | tx->key = NULL; |
Kalle Valo | 3b43a18 | 2010-01-23 20:27:14 +0200 | [diff] [blame] | 634 | else |
| 635 | skip_hw = (tx->key->conf.flags & |
Johannes Berg | e548c49 | 2012-09-04 17:08:23 +0200 | [diff] [blame] | 636 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
Kalle Valo | 3b43a18 | 2010-01-23 20:27:14 +0200 | [diff] [blame] | 637 | ieee80211_is_mgmt(hdr->frame_control); |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 638 | break; |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 639 | case WLAN_CIPHER_SUITE_AES_CMAC: |
Jouni Malinen | 56c52da | 2015-01-24 19:52:08 +0200 | [diff] [blame] | 640 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
Jouni Malinen | 8ade538 | 2015-01-24 19:52:09 +0200 | [diff] [blame] | 641 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
| 642 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 643 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
| 644 | tx->key = NULL; |
| 645 | break; |
Johannes Berg | 176e4f8 | 2007-12-18 15:27:47 +0100 | [diff] [blame] | 646 | } |
Johannes Berg | 813d766 | 2010-01-17 01:47:58 +0100 | [diff] [blame] | 647 | |
Johannes Berg | e54faf2 | 2013-01-29 11:41:38 +0100 | [diff] [blame] | 648 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
| 649 | !ieee80211_is_deauth(hdr->frame_control))) |
Johannes Berg | 95acac6 | 2011-07-12 12:30:59 +0200 | [diff] [blame] | 650 | return TX_DROP; |
| 651 | |
Johannes Berg | f12553e | 2010-01-22 22:07:59 +0100 | [diff] [blame] | 652 | if (!skip_hw && tx->key && |
Johannes Berg | 382b165 | 2010-01-25 11:36:16 +0100 | [diff] [blame] | 653 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
Johannes Berg | 813d766 | 2010-01-17 01:47:58 +0100 | [diff] [blame] | 654 | info->control.hw_key = &tx->key->conf; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 655 | } |
| 656 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 657 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 658 | } |
| 659 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 660 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 661 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 662 | { |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 663 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 664 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
| 665 | struct ieee80211_supported_band *sband; |
Shanyu Zhao | a2c4024 | 2010-04-27 11:15:12 -0700 | [diff] [blame] | 666 | u32 len; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 667 | struct ieee80211_tx_rate_control txrc; |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 668 | struct ieee80211_sta_rates *ratetbl = NULL; |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 669 | bool assoc = false; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 670 | |
| 671 | memset(&txrc, 0, sizeof(txrc)); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 672 | |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 673 | sband = tx->local->hw.wiphy->bands[info->band]; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 674 | |
Shanyu Zhao | a2c4024 | 2010-04-27 11:15:12 -0700 | [diff] [blame] | 675 | len = min_t(u32, tx->skb->len + FCS_LEN, |
Jouni Malinen | b9a5f8ca | 2009-04-20 18:39:05 +0200 | [diff] [blame] | 676 | tx->local->hw.wiphy->frag_threshold); |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 677 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 678 | /* set up the tx rate control struct we give the RC algo */ |
Johannes Berg | 005e472 | 2012-02-26 11:24:35 +0100 | [diff] [blame] | 679 | txrc.hw = &tx->local->hw; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 680 | txrc.sband = sband; |
| 681 | txrc.bss_conf = &tx->sdata->vif.bss_conf; |
| 682 | txrc.skb = tx->skb; |
| 683 | txrc.reported_rate.idx = -1; |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 684 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
Jouni Malinen | 37eb0b1 | 2010-01-06 13:09:08 +0200 | [diff] [blame] | 685 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
| 686 | txrc.max_rate_idx = -1; |
| 687 | else |
| 688 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; |
Felix Fietkau | 2ffbe6d | 2013-04-16 13:38:42 +0200 | [diff] [blame] | 689 | |
| 690 | if (tx->sdata->rc_has_mcs_mask[info->band]) |
| 691 | txrc.rate_idx_mcs_mask = |
| 692 | tx->sdata->rc_rateidx_mcs_mask[info->band]; |
| 693 | |
Felix Fietkau | 8f0729b | 2010-11-11 15:07:23 +0100 | [diff] [blame] | 694 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
Chun-Yeow Yeoh | 4bb6234 | 2011-11-24 17:15:20 -0800 | [diff] [blame] | 695 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
Bertold Van den Bergh | 5765f9f | 2015-08-05 16:02:28 +0200 | [diff] [blame] | 696 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC || |
| 697 | tx->sdata->vif.type == NL80211_IFTYPE_OCB); |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 698 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 699 | /* set up RTS protection if desired */ |
Jouni Malinen | b9a5f8ca | 2009-04-20 18:39:05 +0200 | [diff] [blame] | 700 | if (len > tx->local->hw.wiphy->rts_threshold) { |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 701 | txrc.rts = true; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 702 | } |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 703 | |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 704 | info->control.use_rts = txrc.rts; |
Felix Fietkau | 991fec0 | 2013-04-16 13:38:43 +0200 | [diff] [blame] | 705 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
| 706 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 707 | /* |
| 708 | * Use short preamble if the BSS can handle it, but not for |
| 709 | * management frames unless we know the receiver can handle |
| 710 | * that -- the management frame might be to a station that |
| 711 | * just wants a probe response. |
| 712 | */ |
| 713 | if (tx->sdata->vif.bss_conf.use_short_preamble && |
| 714 | (ieee80211_is_data(hdr->frame_control) || |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 715 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 716 | txrc.short_preamble = true; |
| 717 | |
| 718 | info->control.short_preamble = txrc.short_preamble; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 719 | |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 720 | /* don't ask rate control when rate already injected via radiotap */ |
| 721 | if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT) |
| 722 | return TX_CONTINUE; |
| 723 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 724 | if (tx->sta) |
| 725 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 726 | |
Luis R. Rodriguez | b770b43 | 2009-07-16 10:15:09 -0700 | [diff] [blame] | 727 | /* |
| 728 | * Lets not bother rate control if we're associated and cannot |
| 729 | * talk to the sta. This should not happen. |
| 730 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 731 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
Luis R. Rodriguez | b770b43 | 2009-07-16 10:15:09 -0700 | [diff] [blame] | 732 | !rate_usable_index_exists(sband, &tx->sta->sta), |
| 733 | "%s: Dropped data frame as no usable bitrate found while " |
| 734 | "scanning and associated. Target station: " |
| 735 | "%pM on %d GHz band\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 736 | tx->sdata->name, hdr->addr1, |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 737 | info->band ? 5 : 2)) |
Luis R. Rodriguez | b770b43 | 2009-07-16 10:15:09 -0700 | [diff] [blame] | 738 | return TX_DROP; |
| 739 | |
| 740 | /* |
| 741 | * If we're associated with the sta at this point we know we can at |
| 742 | * least send the frame at the lowest bit rate. |
| 743 | */ |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 744 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
| 745 | |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 746 | if (tx->sta && !info->control.skip_table) |
| 747 | ratetbl = rcu_dereference(tx->sta->sta.rates); |
| 748 | |
| 749 | if (unlikely(info->control.rates[0].idx < 0)) { |
| 750 | if (ratetbl) { |
| 751 | struct ieee80211_tx_rate rate = { |
| 752 | .idx = ratetbl->rate[0].idx, |
| 753 | .flags = ratetbl->rate[0].flags, |
| 754 | .count = ratetbl->rate[0].count |
| 755 | }; |
| 756 | |
| 757 | if (ratetbl->rate[0].idx < 0) |
| 758 | return TX_DROP; |
| 759 | |
| 760 | tx->rate = rate; |
| 761 | } else { |
| 762 | return TX_DROP; |
| 763 | } |
| 764 | } else { |
| 765 | tx->rate = info->control.rates[0]; |
| 766 | } |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 767 | |
Helmut Schaa | c1ce5a7 | 2010-12-01 16:34:45 +0100 | [diff] [blame] | 768 | if (txrc.reported_rate.idx < 0) { |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 769 | txrc.reported_rate = tx->rate; |
Helmut Schaa | c1ce5a7 | 2010-12-01 16:34:45 +0100 | [diff] [blame] | 770 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 771 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
Helmut Schaa | c1ce5a7 | 2010-12-01 16:34:45 +0100 | [diff] [blame] | 772 | } else if (tx->sta) |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 773 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 774 | |
Felix Fietkau | 0d528d8 | 2013-04-22 16:14:41 +0200 | [diff] [blame] | 775 | if (ratetbl) |
| 776 | return TX_CONTINUE; |
| 777 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 778 | if (unlikely(!info->control.rates[0].count)) |
| 779 | info->control.rates[0].count = 1; |
| 780 | |
Gábor Stefanik | 9955151 | 2009-04-23 19:36:14 +0200 | [diff] [blame] | 781 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
| 782 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) |
| 783 | info->control.rates[0].count = 1; |
| 784 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 785 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 786 | } |
| 787 | |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 788 | static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid) |
| 789 | { |
| 790 | u16 *seq = &sta->tid_seq[tid]; |
| 791 | __le16 ret = cpu_to_le16(*seq); |
| 792 | |
| 793 | /* Increase the sequence number. */ |
| 794 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; |
| 795 | |
| 796 | return ret; |
| 797 | } |
| 798 | |
Felix Fietkau | df6ef5d | 2016-09-04 18:00:59 +0200 | [diff] [blame] | 799 | static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local, |
| 800 | struct ieee80211_vif *vif, |
| 801 | struct ieee80211_sta *pubsta, |
| 802 | struct sk_buff *skb) |
| 803 | { |
| 804 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 805 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 806 | struct ieee80211_txq *txq = NULL; |
| 807 | |
| 808 | if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) || |
| 809 | (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE)) |
| 810 | return NULL; |
| 811 | |
| 812 | if (!ieee80211_is_data(hdr->frame_control)) |
| 813 | return NULL; |
| 814 | |
| 815 | if (pubsta) { |
| 816 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; |
| 817 | |
| 818 | txq = pubsta->txq[tid]; |
| 819 | } else if (vif) { |
| 820 | txq = vif->txq; |
| 821 | } |
| 822 | |
| 823 | if (!txq) |
| 824 | return NULL; |
| 825 | |
| 826 | return to_txq_info(txq); |
| 827 | } |
| 828 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 829 | static ieee80211_tx_result debug_noinline |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 830 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) |
| 831 | { |
| 832 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
| 833 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 834 | u8 *qc; |
| 835 | int tid; |
| 836 | |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 837 | /* |
| 838 | * Packet injection may want to control the sequence |
| 839 | * number, if we have no matching interface then we |
| 840 | * neither assign one ourselves nor ask the driver to. |
| 841 | */ |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 842 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 843 | return TX_CONTINUE; |
| 844 | |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 845 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
| 846 | return TX_CONTINUE; |
| 847 | |
| 848 | if (ieee80211_hdrlen(hdr->frame_control) < 24) |
| 849 | return TX_CONTINUE; |
| 850 | |
Johannes Berg | 49a5954 | 2011-09-29 16:04:41 +0200 | [diff] [blame] | 851 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
| 852 | return TX_CONTINUE; |
| 853 | |
Johannes Berg | 9477828 | 2008-10-10 13:21:59 +0200 | [diff] [blame] | 854 | /* |
| 855 | * Anything but QoS data that has a sequence number field |
| 856 | * (is long enough) gets a sequence number from the global |
Bob Copeland | c4c205f | 2013-08-23 09:35:38 -0400 | [diff] [blame] | 857 | * counter. QoS data frames with a multicast destination |
| 858 | * also use the global counter (802.11-2012 9.3.2.10). |
Johannes Berg | 9477828 | 2008-10-10 13:21:59 +0200 | [diff] [blame] | 859 | */ |
Bob Copeland | c4c205f | 2013-08-23 09:35:38 -0400 | [diff] [blame] | 860 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
| 861 | is_multicast_ether_addr(hdr->addr1)) { |
Johannes Berg | 9477828 | 2008-10-10 13:21:59 +0200 | [diff] [blame] | 862 | /* driver should assign sequence number */ |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 863 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
Johannes Berg | 9477828 | 2008-10-10 13:21:59 +0200 | [diff] [blame] | 864 | /* for pure STA mode without beacons, we can do it */ |
| 865 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); |
| 866 | tx->sdata->sequence_number += 0x10; |
Johannes Berg | 79c892b | 2014-11-21 14:26:31 +0100 | [diff] [blame] | 867 | if (tx->sta) |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 868 | tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++; |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 869 | return TX_CONTINUE; |
| 870 | } |
| 871 | |
| 872 | /* |
| 873 | * This should be true for injected/management frames only, for |
| 874 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ |
| 875 | * above since they are not QoS-data frames. |
| 876 | */ |
| 877 | if (!tx->sta) |
| 878 | return TX_CONTINUE; |
| 879 | |
| 880 | /* include per-STA, per-TID sequence counter */ |
| 881 | |
| 882 | qc = ieee80211_get_qos_ctl(hdr); |
| 883 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 884 | tx->sta->tx_stats.msdu[tid]++; |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 885 | |
Felix Fietkau | df6ef5d | 2016-09-04 18:00:59 +0200 | [diff] [blame] | 886 | if (!ieee80211_get_txq(tx->local, info->control.vif, &tx->sta->sta, |
| 887 | tx->skb)) |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 888 | hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid); |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 889 | |
| 890 | return TX_CONTINUE; |
| 891 | } |
| 892 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 893 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 894 | struct sk_buff *skb, int hdrlen, |
| 895 | int frag_threshold) |
| 896 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 897 | struct ieee80211_local *local = tx->local; |
Johannes Berg | a1a3fce | 2011-11-16 15:28:56 +0100 | [diff] [blame] | 898 | struct ieee80211_tx_info *info; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 899 | struct sk_buff *tmp; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 900 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
| 901 | int pos = hdrlen + per_fragm; |
| 902 | int rem = skb->len - hdrlen - per_fragm; |
| 903 | |
| 904 | if (WARN_ON(rem < 0)) |
| 905 | return -EINVAL; |
| 906 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 907 | /* first fragment was already added to queue by caller */ |
| 908 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 909 | while (rem) { |
| 910 | int fraglen = per_fragm; |
| 911 | |
| 912 | if (fraglen > rem) |
| 913 | fraglen = rem; |
| 914 | rem -= fraglen; |
| 915 | tmp = dev_alloc_skb(local->tx_headroom + |
| 916 | frag_threshold + |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 917 | tx->sdata->encrypt_headroom + |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 918 | IEEE80211_ENCRYPT_TAILROOM); |
| 919 | if (!tmp) |
| 920 | return -ENOMEM; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 921 | |
| 922 | __skb_queue_tail(&tx->skbs, tmp); |
| 923 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 924 | skb_reserve(tmp, |
| 925 | local->tx_headroom + tx->sdata->encrypt_headroom); |
| 926 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 927 | /* copy control information */ |
| 928 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); |
Johannes Berg | a1a3fce | 2011-11-16 15:28:56 +0100 | [diff] [blame] | 929 | |
| 930 | info = IEEE80211_SKB_CB(tmp); |
| 931 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | |
| 932 | IEEE80211_TX_CTL_FIRST_FRAGMENT); |
| 933 | |
| 934 | if (rem) |
| 935 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; |
| 936 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 937 | skb_copy_queue_mapping(tmp, skb); |
| 938 | tmp->priority = skb->priority; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 939 | tmp->dev = skb->dev; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 940 | |
| 941 | /* copy header and data */ |
| 942 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); |
| 943 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); |
| 944 | |
| 945 | pos += fraglen; |
| 946 | } |
| 947 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 948 | /* adjust first fragment's length */ |
Johannes Berg | 338f977 | 2014-02-01 00:16:23 +0100 | [diff] [blame] | 949 | skb_trim(skb, hdrlen + per_fragm); |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 950 | return 0; |
| 951 | } |
| 952 | |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 953 | static ieee80211_tx_result debug_noinline |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 954 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
| 955 | { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 956 | struct sk_buff *skb = tx->skb; |
| 957 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 958 | struct ieee80211_hdr *hdr = (void *)skb->data; |
Jouni Malinen | b9a5f8ca | 2009-04-20 18:39:05 +0200 | [diff] [blame] | 959 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 960 | int hdrlen; |
| 961 | int fragnum; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 962 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 963 | /* no matter what happens, tx->skb moves to tx->skbs */ |
| 964 | __skb_queue_tail(&tx->skbs, skb); |
| 965 | tx->skb = NULL; |
| 966 | |
Johannes Berg | a26eb27 | 2011-10-07 14:01:25 +0200 | [diff] [blame] | 967 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
| 968 | return TX_CONTINUE; |
| 969 | |
| 970 | if (tx->local->ops->set_frag_threshold) |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 971 | return TX_CONTINUE; |
| 972 | |
Johannes Berg | eefce91 | 2008-05-17 00:57:13 +0200 | [diff] [blame] | 973 | /* |
| 974 | * Warn when submitting a fragmented A-MPDU frame and drop it. |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 975 | * This scenario is handled in ieee80211_tx_prepare but extra |
Ron Rindjunsky | 8d5e0d5 | 2008-06-12 15:42:29 +0300 | [diff] [blame] | 976 | * caution taken here as fragmented ampdu may cause Tx stop. |
Johannes Berg | eefce91 | 2008-05-17 00:57:13 +0200 | [diff] [blame] | 977 | */ |
Sujith | 8b30b1f | 2008-10-24 09:55:27 +0530 | [diff] [blame] | 978 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
Johannes Berg | eefce91 | 2008-05-17 00:57:13 +0200 | [diff] [blame] | 979 | return TX_DROP; |
| 980 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 981 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 982 | |
Johannes Berg | a26eb27 | 2011-10-07 14:01:25 +0200 | [diff] [blame] | 983 | /* internal error, why isn't DONTFRAG set? */ |
Johannes Berg | 8ccd8f2 | 2009-04-29 23:35:56 +0200 | [diff] [blame] | 984 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 985 | return TX_DROP; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 986 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 987 | /* |
| 988 | * Now fragment the frame. This will allocate all the fragments and |
| 989 | * chain them (using skb as the first fragment) to skb->next. |
| 990 | * During transmission, we will remove the successfully transmitted |
| 991 | * fragments from this list. When the low-level driver rejects one |
| 992 | * of the fragments then we will simply pretend to accept the skb |
| 993 | * but store it away as pending. |
| 994 | */ |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 995 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 996 | return TX_DROP; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 997 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 998 | /* update duration/seq/flags of fragments */ |
| 999 | fragnum = 0; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1000 | |
| 1001 | skb_queue_walk(&tx->skbs, skb) { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1002 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1003 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1004 | hdr = (void *)skb->data; |
| 1005 | info = IEEE80211_SKB_CB(skb); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 1006 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1007 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1008 | hdr->frame_control |= morefrags; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 1009 | /* |
| 1010 | * No multi-rate retries for fragmented frames, that |
| 1011 | * would completely throw off the NAV at other STAs. |
| 1012 | */ |
| 1013 | info->control.rates[1].idx = -1; |
| 1014 | info->control.rates[2].idx = -1; |
| 1015 | info->control.rates[3].idx = -1; |
Thomas Huehn | e3e1a0b | 2012-07-02 19:46:16 +0200 | [diff] [blame] | 1016 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 1017 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1018 | } else { |
| 1019 | hdr->frame_control &= ~morefrags; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 1020 | } |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1021 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
| 1022 | fragnum++; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1023 | } |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1024 | |
| 1025 | return TX_CONTINUE; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1026 | } |
| 1027 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 1028 | static ieee80211_tx_result debug_noinline |
Johannes Berg | feff1f2 | 2009-08-10 16:01:54 +0200 | [diff] [blame] | 1029 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) |
| 1030 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1031 | struct sk_buff *skb; |
Johannes Berg | 560d268 | 2013-02-05 10:55:21 +0100 | [diff] [blame] | 1032 | int ac = -1; |
Johannes Berg | feff1f2 | 2009-08-10 16:01:54 +0200 | [diff] [blame] | 1033 | |
| 1034 | if (!tx->sta) |
| 1035 | return TX_CONTINUE; |
| 1036 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1037 | skb_queue_walk(&tx->skbs, skb) { |
Johannes Berg | 560d268 | 2013-02-05 10:55:21 +0100 | [diff] [blame] | 1038 | ac = skb_get_queue_mapping(skb); |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 1039 | tx->sta->tx_stats.bytes[ac] += skb->len; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1040 | } |
Johannes Berg | 560d268 | 2013-02-05 10:55:21 +0100 | [diff] [blame] | 1041 | if (ac >= 0) |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 1042 | tx->sta->tx_stats.packets[ac]++; |
Johannes Berg | feff1f2 | 2009-08-10 16:01:54 +0200 | [diff] [blame] | 1043 | |
| 1044 | return TX_CONTINUE; |
| 1045 | } |
| 1046 | |
| 1047 | static ieee80211_tx_result debug_noinline |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1048 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
| 1049 | { |
| 1050 | if (!tx->key) |
| 1051 | return TX_CONTINUE; |
| 1052 | |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1053 | switch (tx->key->conf.cipher) { |
| 1054 | case WLAN_CIPHER_SUITE_WEP40: |
| 1055 | case WLAN_CIPHER_SUITE_WEP104: |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1056 | return ieee80211_crypto_wep_encrypt(tx); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1057 | case WLAN_CIPHER_SUITE_TKIP: |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1058 | return ieee80211_crypto_tkip_encrypt(tx); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1059 | case WLAN_CIPHER_SUITE_CCMP: |
Jouni Malinen | 2b2ba0d | 2015-01-24 19:52:07 +0200 | [diff] [blame] | 1060 | return ieee80211_crypto_ccmp_encrypt( |
| 1061 | tx, IEEE80211_CCMP_MIC_LEN); |
| 1062 | case WLAN_CIPHER_SUITE_CCMP_256: |
| 1063 | return ieee80211_crypto_ccmp_encrypt( |
| 1064 | tx, IEEE80211_CCMP_256_MIC_LEN); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1065 | case WLAN_CIPHER_SUITE_AES_CMAC: |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 1066 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
Jouni Malinen | 56c52da | 2015-01-24 19:52:08 +0200 | [diff] [blame] | 1067 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
| 1068 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); |
Jouni Malinen | 8ade538 | 2015-01-24 19:52:09 +0200 | [diff] [blame] | 1069 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
| 1070 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: |
| 1071 | return ieee80211_crypto_aes_gmac_encrypt(tx); |
Jouni Malinen | 00b9cfa | 2015-01-24 19:52:06 +0200 | [diff] [blame] | 1072 | case WLAN_CIPHER_SUITE_GCMP: |
| 1073 | case WLAN_CIPHER_SUITE_GCMP_256: |
| 1074 | return ieee80211_crypto_gcmp_encrypt(tx); |
Johannes Berg | 3ffc2a9 | 2010-08-27 14:26:52 +0300 | [diff] [blame] | 1075 | default: |
Yoni Divinsky | d32a102 | 2012-01-16 15:18:59 +0200 | [diff] [blame] | 1076 | return ieee80211_crypto_hw_encrypt(tx); |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1077 | } |
| 1078 | |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1079 | return TX_DROP; |
| 1080 | } |
| 1081 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 1082 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1083 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
| 1084 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1085 | struct sk_buff *skb; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1086 | struct ieee80211_hdr *hdr; |
| 1087 | int next_len; |
| 1088 | bool group_addr; |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1089 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1090 | skb_queue_walk(&tx->skbs, skb) { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1091 | hdr = (void *) skb->data; |
Jouni Malinen | 7e0aae4 | 2009-05-19 19:25:58 +0300 | [diff] [blame] | 1092 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
| 1093 | break; /* must not overwrite AID */ |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1094 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
| 1095 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); |
| 1096 | next_len = next->len; |
| 1097 | } else |
| 1098 | next_len = 0; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1099 | group_addr = is_multicast_ether_addr(hdr->addr1); |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1100 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1101 | hdr->duration_id = |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1102 | ieee80211_duration(tx, skb, group_addr, next_len); |
| 1103 | } |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1104 | |
| 1105 | return TX_CONTINUE; |
| 1106 | } |
| 1107 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1108 | /* actual transmit path */ |
| 1109 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1110 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
| 1111 | struct sk_buff *skb, |
| 1112 | struct ieee80211_tx_info *info, |
| 1113 | struct tid_ampdu_tx *tid_tx, |
| 1114 | int tid) |
| 1115 | { |
| 1116 | bool queued = false; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1117 | bool reset_agg_timer = false; |
Helmut Schaa | aa45458 | 2012-03-07 17:20:30 +0100 | [diff] [blame] | 1118 | struct sk_buff *purge_skb = NULL; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1119 | |
| 1120 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { |
| 1121 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1122 | reset_agg_timer = true; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 1123 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
| 1124 | /* |
| 1125 | * nothing -- this aggregation session is being started |
| 1126 | * but that might still fail with the driver |
| 1127 | */ |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1128 | } else if (!tx->sta->sta.txq[tid]) { |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1129 | spin_lock(&tx->sta->lock); |
| 1130 | /* |
| 1131 | * Need to re-check now, because we may get here |
| 1132 | * |
| 1133 | * 1) in the window during which the setup is actually |
| 1134 | * already done, but not marked yet because not all |
| 1135 | * packets are spliced over to the driver pending |
| 1136 | * queue yet -- if this happened we acquire the lock |
| 1137 | * either before or after the splice happens, but |
| 1138 | * need to recheck which of these cases happened. |
| 1139 | * |
| 1140 | * 2) during session teardown, if the OPERATIONAL bit |
| 1141 | * was cleared due to the teardown but the pointer |
| 1142 | * hasn't been assigned NULL yet (or we loaded it |
| 1143 | * before it was assigned) -- in this case it may |
| 1144 | * now be NULL which means we should just let the |
| 1145 | * packet pass through because splicing the frames |
| 1146 | * back is already done. |
| 1147 | */ |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1148 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1149 | |
| 1150 | if (!tid_tx) { |
| 1151 | /* do nothing, let packet pass through */ |
| 1152 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { |
| 1153 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1154 | reset_agg_timer = true; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1155 | } else { |
| 1156 | queued = true; |
Emmanuel Grumbach | f6d4671 | 2016-03-17 16:51:42 +0200 | [diff] [blame] | 1157 | if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) { |
| 1158 | clear_sta_flag(tx->sta, WLAN_STA_SP); |
| 1159 | ps_dbg(tx->sta->sdata, |
| 1160 | "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n", |
| 1161 | tx->sta->sta.addr, tx->sta->sta.aid); |
| 1162 | } |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1163 | info->control.vif = &tx->sdata->vif; |
| 1164 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
Emmanuel Grumbach | facde7f | 2016-03-17 16:51:41 +0200 | [diff] [blame] | 1165 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1166 | __skb_queue_tail(&tid_tx->pending, skb); |
Helmut Schaa | aa45458 | 2012-03-07 17:20:30 +0100 | [diff] [blame] | 1167 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
| 1168 | purge_skb = __skb_dequeue(&tid_tx->pending); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1169 | } |
| 1170 | spin_unlock(&tx->sta->lock); |
Helmut Schaa | aa45458 | 2012-03-07 17:20:30 +0100 | [diff] [blame] | 1171 | |
| 1172 | if (purge_skb) |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1173 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1174 | } |
| 1175 | |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1176 | /* reset session timer */ |
| 1177 | if (reset_agg_timer && tid_tx->timeout) |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 1178 | tid_tx->last_tx = jiffies; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1179 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1180 | return queued; |
| 1181 | } |
| 1182 | |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1183 | /* |
| 1184 | * initialises @tx |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1185 | * pass %NULL for the station if unknown, a valid pointer if known |
| 1186 | * or an ERR_PTR() if the station is known not to exist |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1187 | */ |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1188 | static ieee80211_tx_result |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1189 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
| 1190 | struct ieee80211_tx_data *tx, |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1191 | struct sta_info *sta, struct sk_buff *skb) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1192 | { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1193 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1194 | struct ieee80211_hdr *hdr; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1195 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 68f2b51 | 2011-10-07 14:01:24 +0200 | [diff] [blame] | 1196 | int tid; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1197 | u8 *qc; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1198 | |
| 1199 | memset(tx, 0, sizeof(*tx)); |
| 1200 | tx->skb = skb; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1201 | tx->local = local; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1202 | tx->sdata = sdata; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1203 | __skb_queue_head_init(&tx->skbs); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1204 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1205 | /* |
| 1206 | * If this flag is set to true anywhere, and we get here, |
| 1207 | * we are doing the needed processing, so remove the flag |
| 1208 | * now. |
| 1209 | */ |
| 1210 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
| 1211 | |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1212 | hdr = (struct ieee80211_hdr *) skb->data; |
| 1213 | |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1214 | if (likely(sta)) { |
| 1215 | if (!IS_ERR(sta)) |
| 1216 | tx->sta = sta; |
| 1217 | } else { |
| 1218 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
| 1219 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
| 1220 | if (!tx->sta && sdata->wdev.use_4addr) |
| 1221 | return TX_DROP; |
| 1222 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | |
| 1223 | IEEE80211_TX_CTL_INJECTED) || |
| 1224 | tx->sdata->control_port_protocol == tx->skb->protocol) { |
| 1225 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
| 1226 | } |
| 1227 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) |
| 1228 | tx->sta = sta_info_get(sdata, hdr->addr1); |
Felix Fietkau | 3f0e0b2 | 2010-01-08 18:15:13 +0100 | [diff] [blame] | 1229 | } |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1230 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1231 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
Johannes Berg | 49a5954 | 2011-09-29 16:04:41 +0200 | [diff] [blame] | 1232 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 1233 | ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) && |
| 1234 | !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) { |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1235 | struct tid_ampdu_tx *tid_tx; |
| 1236 | |
Sujith | 8b30b1f | 2008-10-24 09:55:27 +0530 | [diff] [blame] | 1237 | qc = ieee80211_get_qos_ctl(hdr); |
| 1238 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
| 1239 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1240 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
| 1241 | if (tid_tx) { |
| 1242 | bool queued; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1243 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1244 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
| 1245 | tid_tx, tid); |
| 1246 | |
| 1247 | if (unlikely(queued)) |
| 1248 | return TX_QUEUED; |
| 1249 | } |
Sujith | 8b30b1f | 2008-10-24 09:55:27 +0530 | [diff] [blame] | 1250 | } |
| 1251 | |
Jiri Slaby | badffb7 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 1252 | if (is_multicast_ether_addr(hdr->addr1)) { |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1253 | tx->flags &= ~IEEE80211_TX_UNICAST; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1254 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
Simon Wunderlich | 6fd67e9 | 2011-11-18 14:20:42 +0100 | [diff] [blame] | 1255 | } else |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1256 | tx->flags |= IEEE80211_TX_UNICAST; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1257 | |
Johannes Berg | a26eb27 | 2011-10-07 14:01:25 +0200 | [diff] [blame] | 1258 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
| 1259 | if (!(tx->flags & IEEE80211_TX_UNICAST) || |
| 1260 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || |
| 1261 | info->flags & IEEE80211_TX_CTL_AMPDU) |
| 1262 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1263 | } |
| 1264 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1265 | if (!tx->sta) |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1266 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
Felix Fietkau | f7418bc | 2015-09-24 14:59:49 +0200 | [diff] [blame] | 1267 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) { |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1268 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
Felix Fietkau | f7418bc | 2015-09-24 14:59:49 +0200 | [diff] [blame] | 1269 | ieee80211_check_fast_xmit(tx->sta); |
| 1270 | } |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1271 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1272 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1273 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1274 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1275 | } |
| 1276 | |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1277 | static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb) |
| 1278 | { |
| 1279 | IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time(); |
| 1280 | } |
| 1281 | |
| 1282 | static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi) |
| 1283 | { |
| 1284 | IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif; |
| 1285 | } |
| 1286 | |
| 1287 | static u32 codel_skb_len_func(const struct sk_buff *skb) |
| 1288 | { |
| 1289 | return skb->len; |
| 1290 | } |
| 1291 | |
| 1292 | static codel_time_t codel_skb_time_func(const struct sk_buff *skb) |
| 1293 | { |
| 1294 | const struct ieee80211_tx_info *info; |
| 1295 | |
| 1296 | info = (const struct ieee80211_tx_info *)skb->cb; |
| 1297 | return info->control.enqueue_time; |
| 1298 | } |
| 1299 | |
| 1300 | static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars, |
| 1301 | void *ctx) |
| 1302 | { |
| 1303 | struct ieee80211_local *local; |
| 1304 | struct txq_info *txqi; |
| 1305 | struct fq *fq; |
| 1306 | struct fq_flow *flow; |
| 1307 | |
| 1308 | txqi = ctx; |
| 1309 | local = vif_to_sdata(txqi->txq.vif)->local; |
| 1310 | fq = &local->fq; |
| 1311 | |
| 1312 | if (cvars == &txqi->def_cvars) |
| 1313 | flow = &txqi->def_flow; |
| 1314 | else |
| 1315 | flow = &fq->flows[cvars - local->cvars]; |
| 1316 | |
| 1317 | return fq_flow_dequeue(fq, flow); |
| 1318 | } |
| 1319 | |
| 1320 | static void codel_drop_func(struct sk_buff *skb, |
| 1321 | void *ctx) |
| 1322 | { |
| 1323 | struct ieee80211_local *local; |
| 1324 | struct ieee80211_hw *hw; |
| 1325 | struct txq_info *txqi; |
| 1326 | |
| 1327 | txqi = ctx; |
| 1328 | local = vif_to_sdata(txqi->txq.vif)->local; |
| 1329 | hw = &local->hw; |
| 1330 | |
| 1331 | ieee80211_free_txskb(hw, skb); |
| 1332 | } |
| 1333 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1334 | static struct sk_buff *fq_tin_dequeue_func(struct fq *fq, |
| 1335 | struct fq_tin *tin, |
| 1336 | struct fq_flow *flow) |
| 1337 | { |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1338 | struct ieee80211_local *local; |
| 1339 | struct txq_info *txqi; |
| 1340 | struct codel_vars *cvars; |
| 1341 | struct codel_params *cparams; |
| 1342 | struct codel_stats *cstats; |
| 1343 | |
| 1344 | local = container_of(fq, struct ieee80211_local, fq); |
| 1345 | txqi = container_of(tin, struct txq_info, tin); |
| 1346 | cparams = &local->cparams; |
| 1347 | cstats = &local->cstats; |
| 1348 | |
| 1349 | if (flow == &txqi->def_flow) |
| 1350 | cvars = &txqi->def_cvars; |
| 1351 | else |
| 1352 | cvars = &local->cvars[flow - fq->flows]; |
| 1353 | |
| 1354 | return codel_dequeue(txqi, |
| 1355 | &flow->backlog, |
| 1356 | cparams, |
| 1357 | cvars, |
| 1358 | cstats, |
| 1359 | codel_skb_len_func, |
| 1360 | codel_skb_time_func, |
| 1361 | codel_drop_func, |
| 1362 | codel_dequeue_func); |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1363 | } |
| 1364 | |
| 1365 | static void fq_skb_free_func(struct fq *fq, |
| 1366 | struct fq_tin *tin, |
| 1367 | struct fq_flow *flow, |
| 1368 | struct sk_buff *skb) |
| 1369 | { |
| 1370 | struct ieee80211_local *local; |
| 1371 | |
| 1372 | local = container_of(fq, struct ieee80211_local, fq); |
| 1373 | ieee80211_free_txskb(&local->hw, skb); |
| 1374 | } |
| 1375 | |
| 1376 | static struct fq_flow *fq_flow_get_default_func(struct fq *fq, |
| 1377 | struct fq_tin *tin, |
| 1378 | int idx, |
| 1379 | struct sk_buff *skb) |
| 1380 | { |
| 1381 | struct txq_info *txqi; |
| 1382 | |
| 1383 | txqi = container_of(tin, struct txq_info, tin); |
| 1384 | return &txqi->def_flow; |
| 1385 | } |
| 1386 | |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1387 | static void ieee80211_txq_enqueue(struct ieee80211_local *local, |
| 1388 | struct txq_info *txqi, |
| 1389 | struct sk_buff *skb) |
| 1390 | { |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1391 | struct fq *fq = &local->fq; |
| 1392 | struct fq_tin *tin = &txqi->tin; |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1393 | |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1394 | ieee80211_set_skb_enqueue_time(skb); |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1395 | fq_tin_enqueue(fq, tin, skb, |
| 1396 | fq_skb_free_func, |
| 1397 | fq_flow_get_default_func); |
| 1398 | } |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1399 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1400 | void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata, |
| 1401 | struct sta_info *sta, |
| 1402 | struct txq_info *txqi, int tid) |
| 1403 | { |
| 1404 | fq_tin_init(&txqi->tin); |
| 1405 | fq_flow_init(&txqi->def_flow); |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1406 | codel_vars_init(&txqi->def_cvars); |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1407 | |
| 1408 | txqi->txq.vif = &sdata->vif; |
| 1409 | |
| 1410 | if (sta) { |
| 1411 | txqi->txq.sta = &sta->sta; |
| 1412 | sta->sta.txq[tid] = &txqi->txq; |
| 1413 | txqi->txq.tid = tid; |
| 1414 | txqi->txq.ac = ieee802_1d_to_ac[tid & 7]; |
| 1415 | } else { |
| 1416 | sdata->vif.txq = &txqi->txq; |
| 1417 | txqi->txq.tid = 0; |
| 1418 | txqi->txq.ac = IEEE80211_AC_BE; |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1419 | } |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1420 | } |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1421 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1422 | void ieee80211_txq_purge(struct ieee80211_local *local, |
| 1423 | struct txq_info *txqi) |
| 1424 | { |
| 1425 | struct fq *fq = &local->fq; |
| 1426 | struct fq_tin *tin = &txqi->tin; |
| 1427 | |
| 1428 | fq_tin_reset(fq, tin, fq_skb_free_func); |
| 1429 | } |
| 1430 | |
| 1431 | int ieee80211_txq_setup_flows(struct ieee80211_local *local) |
| 1432 | { |
| 1433 | struct fq *fq = &local->fq; |
| 1434 | int ret; |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1435 | int i; |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1436 | |
| 1437 | if (!local->ops->wake_tx_queue) |
| 1438 | return 0; |
| 1439 | |
| 1440 | ret = fq_init(fq, 4096); |
| 1441 | if (ret) |
| 1442 | return ret; |
| 1443 | |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1444 | codel_params_init(&local->cparams); |
| 1445 | codel_stats_init(&local->cstats); |
| 1446 | local->cparams.interval = MS2TIME(100); |
| 1447 | local->cparams.target = MS2TIME(20); |
| 1448 | local->cparams.ecn = true; |
| 1449 | |
| 1450 | local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]), |
| 1451 | GFP_KERNEL); |
| 1452 | if (!local->cvars) { |
Michal Kazior | 59a7c82 | 2016-06-29 14:00:34 +0200 | [diff] [blame] | 1453 | spin_lock_bh(&fq->lock); |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1454 | fq_reset(fq, fq_skb_free_func); |
Michal Kazior | 59a7c82 | 2016-06-29 14:00:34 +0200 | [diff] [blame] | 1455 | spin_unlock_bh(&fq->lock); |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1456 | return -ENOMEM; |
| 1457 | } |
| 1458 | |
| 1459 | for (i = 0; i < fq->flows_cnt; i++) |
| 1460 | codel_vars_init(&local->cvars[i]); |
| 1461 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1462 | return 0; |
| 1463 | } |
| 1464 | |
| 1465 | void ieee80211_txq_teardown_flows(struct ieee80211_local *local) |
| 1466 | { |
| 1467 | struct fq *fq = &local->fq; |
| 1468 | |
| 1469 | if (!local->ops->wake_tx_queue) |
| 1470 | return; |
| 1471 | |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1472 | kfree(local->cvars); |
| 1473 | local->cvars = NULL; |
| 1474 | |
Michal Kazior | 59a7c82 | 2016-06-29 14:00:34 +0200 | [diff] [blame] | 1475 | spin_lock_bh(&fq->lock); |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1476 | fq_reset(fq, fq_skb_free_func); |
Michal Kazior | 59a7c82 | 2016-06-29 14:00:34 +0200 | [diff] [blame] | 1477 | spin_unlock_bh(&fq->lock); |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1478 | } |
| 1479 | |
| 1480 | struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, |
| 1481 | struct ieee80211_txq *txq) |
| 1482 | { |
| 1483 | struct ieee80211_local *local = hw_to_local(hw); |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1484 | struct txq_info *txqi = container_of(txq, struct txq_info, txq); |
| 1485 | struct ieee80211_hdr *hdr; |
| 1486 | struct sk_buff *skb = NULL; |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1487 | struct fq *fq = &local->fq; |
| 1488 | struct fq_tin *tin = &txqi->tin; |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1489 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1490 | spin_lock_bh(&fq->lock); |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1491 | |
| 1492 | if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags)) |
| 1493 | goto out; |
| 1494 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1495 | skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func); |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1496 | if (!skb) |
| 1497 | goto out; |
| 1498 | |
Michal Kazior | 5caa328 | 2016-05-19 10:37:51 +0200 | [diff] [blame] | 1499 | ieee80211_set_skb_vif(skb, txqi); |
| 1500 | |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1501 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1502 | if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) { |
| 1503 | struct sta_info *sta = container_of(txq->sta, struct sta_info, |
| 1504 | sta); |
| 1505 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1506 | |
| 1507 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, txq->tid); |
| 1508 | if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags)) |
| 1509 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
| 1510 | else |
| 1511 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
| 1512 | } |
| 1513 | |
| 1514 | out: |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1515 | spin_unlock_bh(&fq->lock); |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1516 | |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 1517 | if (skb && skb_has_frag_list(skb) && |
Johannes Berg | 0b97a48 | 2016-09-14 09:41:34 +0200 | [diff] [blame] | 1518 | !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) { |
| 1519 | if (skb_linearize(skb)) { |
| 1520 | ieee80211_free_txskb(&local->hw, skb); |
| 1521 | return NULL; |
| 1522 | } |
| 1523 | } |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 1524 | |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 1525 | return skb; |
| 1526 | } |
| 1527 | EXPORT_SYMBOL(ieee80211_tx_dequeue); |
| 1528 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1529 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
| 1530 | struct ieee80211_vif *vif, |
| 1531 | struct ieee80211_sta *sta, |
| 1532 | struct sk_buff_head *skbs, |
| 1533 | bool txpending) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1534 | { |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1535 | struct ieee80211_tx_control control = {}; |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1536 | struct fq *fq = &local->fq; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1537 | struct sk_buff *skb, *tmp; |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1538 | struct txq_info *txqi; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1539 | unsigned long flags; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1540 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1541 | skb_queue_walk_safe(skbs, skb, tmp) { |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1542 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1543 | int q = info->hw_queue; |
| 1544 | |
| 1545 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 1546 | if (WARN_ON_ONCE(q >= local->hw.queues)) { |
| 1547 | __skb_unlink(skb, skbs); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1548 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1549 | continue; |
| 1550 | } |
| 1551 | #endif |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1552 | |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1553 | txqi = ieee80211_get_txq(local, vif, sta, skb); |
| 1554 | if (txqi) { |
| 1555 | info->control.vif = vif; |
| 1556 | |
| 1557 | __skb_unlink(skb, skbs); |
| 1558 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1559 | spin_lock_bh(&fq->lock); |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1560 | ieee80211_txq_enqueue(local, txqi, skb); |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 1561 | spin_unlock_bh(&fq->lock); |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1562 | |
| 1563 | drv_wake_tx_queue(local, txqi); |
| 1564 | |
| 1565 | continue; |
| 1566 | } |
| 1567 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1568 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1569 | if (local->queue_stop_reasons[q] || |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1570 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 1571 | if (unlikely(info->flags & |
Seth Forshee | a7679ed | 2013-02-25 14:58:05 -0600 | [diff] [blame] | 1572 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
| 1573 | if (local->queue_stop_reasons[q] & |
| 1574 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { |
| 1575 | /* |
| 1576 | * Drop off-channel frames if queues |
| 1577 | * are stopped for any reason other |
| 1578 | * than off-channel operation. Never |
| 1579 | * queue them. |
| 1580 | */ |
| 1581 | spin_unlock_irqrestore( |
| 1582 | &local->queue_stop_reason_lock, |
| 1583 | flags); |
| 1584 | ieee80211_purge_tx_queue(&local->hw, |
| 1585 | skbs); |
| 1586 | return true; |
| 1587 | } |
| 1588 | } else { |
| 1589 | |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 1590 | /* |
Seth Forshee | a7679ed | 2013-02-25 14:58:05 -0600 | [diff] [blame] | 1591 | * Since queue is stopped, queue up frames for |
| 1592 | * later transmission from the tx-pending |
| 1593 | * tasklet when the queue is woken again. |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 1594 | */ |
Seth Forshee | a7679ed | 2013-02-25 14:58:05 -0600 | [diff] [blame] | 1595 | if (txpending) |
| 1596 | skb_queue_splice_init(skbs, |
| 1597 | &local->pending[q]); |
| 1598 | else |
| 1599 | skb_queue_splice_tail_init(skbs, |
| 1600 | &local->pending[q]); |
| 1601 | |
| 1602 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
| 1603 | flags); |
| 1604 | return false; |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 1605 | } |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1606 | } |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1607 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
Tomas Winkler | f8e79dd | 2008-07-24 18:46:44 +0300 | [diff] [blame] | 1608 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1609 | info->control.vif = vif; |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1610 | control.sta = sta; |
Johannes Berg | ec25acc | 2010-07-22 17:11:28 +0200 | [diff] [blame] | 1611 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1612 | __skb_unlink(skb, skbs); |
Michal Kazior | 80a83cf | 2016-05-19 10:37:48 +0200 | [diff] [blame] | 1613 | drv_tx(local, &control, skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1614 | } |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1615 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1616 | return true; |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * Returns false if the frame couldn't be transmitted but was queued instead. |
| 1621 | */ |
| 1622 | static bool __ieee80211_tx(struct ieee80211_local *local, |
| 1623 | struct sk_buff_head *skbs, int led_len, |
| 1624 | struct sta_info *sta, bool txpending) |
| 1625 | { |
| 1626 | struct ieee80211_tx_info *info; |
| 1627 | struct ieee80211_sub_if_data *sdata; |
| 1628 | struct ieee80211_vif *vif; |
| 1629 | struct ieee80211_sta *pubsta; |
| 1630 | struct sk_buff *skb; |
| 1631 | bool result = true; |
| 1632 | __le16 fc; |
| 1633 | |
| 1634 | if (WARN_ON(skb_queue_empty(skbs))) |
| 1635 | return true; |
| 1636 | |
| 1637 | skb = skb_peek(skbs); |
| 1638 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
| 1639 | info = IEEE80211_SKB_CB(skb); |
| 1640 | sdata = vif_to_sdata(info->control.vif); |
| 1641 | if (sta && !sta->uploaded) |
| 1642 | sta = NULL; |
| 1643 | |
| 1644 | if (sta) |
| 1645 | pubsta = &sta->sta; |
| 1646 | else |
| 1647 | pubsta = NULL; |
| 1648 | |
| 1649 | switch (sdata->vif.type) { |
| 1650 | case NL80211_IFTYPE_MONITOR: |
Johannes Berg | c82b5a7 | 2013-07-14 23:39:20 +0300 | [diff] [blame] | 1651 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
| 1652 | vif = &sdata->vif; |
| 1653 | break; |
| 1654 | } |
Johannes Berg | 4b6f1dd | 2012-04-03 14:35:57 +0200 | [diff] [blame] | 1655 | sdata = rcu_dereference(local->monitor_sdata); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1656 | if (sdata) { |
Johannes Berg | 4b6f1dd | 2012-04-03 14:35:57 +0200 | [diff] [blame] | 1657 | vif = &sdata->vif; |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1658 | info->hw_queue = |
| 1659 | vif->hw_queue[skb_get_queue_mapping(skb)]; |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 1660 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { |
Johannes Berg | 63b4d8b | 2015-11-24 15:41:50 +0100 | [diff] [blame] | 1661 | ieee80211_purge_tx_queue(&local->hw, skbs); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1662 | return true; |
| 1663 | } else |
Johannes Berg | 4b6f1dd | 2012-04-03 14:35:57 +0200 | [diff] [blame] | 1664 | vif = NULL; |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1665 | break; |
| 1666 | case NL80211_IFTYPE_AP_VLAN: |
| 1667 | sdata = container_of(sdata->bss, |
| 1668 | struct ieee80211_sub_if_data, u.ap); |
| 1669 | /* fall through */ |
| 1670 | default: |
| 1671 | vif = &sdata->vif; |
| 1672 | break; |
| 1673 | } |
| 1674 | |
Johannes Berg | cb831b5 | 2012-07-02 15:40:18 +0200 | [diff] [blame] | 1675 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
| 1676 | txpending); |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1677 | |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1678 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1679 | |
Johannes Berg | 4db4e0a | 2011-11-24 14:47:36 +0100 | [diff] [blame] | 1680 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1681 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1682 | return result; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1683 | } |
| 1684 | |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1685 | /* |
| 1686 | * Invoke TX handlers, return 0 on success and non-zero if the |
| 1687 | * frame was dropped or queued. |
| 1688 | */ |
| 1689 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) |
| 1690 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1691 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1692 | ieee80211_tx_result res = TX_DROP; |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1693 | |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1694 | #define CALL_TXH(txh) \ |
| 1695 | do { \ |
| 1696 | res = txh(tx); \ |
| 1697 | if (res != TX_CONTINUE) \ |
| 1698 | goto txh_done; \ |
| 1699 | } while (0) |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1700 | |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 1701 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1702 | CALL_TXH(ieee80211_tx_h_check_assoc); |
| 1703 | CALL_TXH(ieee80211_tx_h_ps_buf); |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 1704 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1705 | CALL_TXH(ieee80211_tx_h_select_key); |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 1706 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
Johannes Berg | af65cd96 | 2009-11-17 18:18:36 +0100 | [diff] [blame] | 1707 | CALL_TXH(ieee80211_tx_h_rate_ctrl); |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 1708 | |
Johannes Berg | aa5b549 | 2011-12-02 22:08:52 +0100 | [diff] [blame] | 1709 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
| 1710 | __skb_queue_tail(&tx->skbs, tx->skb); |
| 1711 | tx->skb = NULL; |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 1712 | goto txh_done; |
Johannes Berg | aa5b549 | 2011-12-02 22:08:52 +0100 | [diff] [blame] | 1713 | } |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 1714 | |
| 1715 | CALL_TXH(ieee80211_tx_h_michael_mic_add); |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1716 | CALL_TXH(ieee80211_tx_h_sequence); |
| 1717 | CALL_TXH(ieee80211_tx_h_fragment); |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 1718 | /* handlers after fragment must be aware of tx info fragmentation! */ |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1719 | CALL_TXH(ieee80211_tx_h_stats); |
| 1720 | CALL_TXH(ieee80211_tx_h_encrypt); |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 1721 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
Arik Nemtsov | 8fd369e | 2011-01-31 22:29:12 +0200 | [diff] [blame] | 1722 | CALL_TXH(ieee80211_tx_h_calculate_duration); |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 1723 | #undef CALL_TXH |
| 1724 | |
| 1725 | txh_done: |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1726 | if (unlikely(res == TX_DROP)) { |
Tomas Winkler | 5479d0e | 2008-06-28 03:15:03 +0300 | [diff] [blame] | 1727 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1728 | if (tx->skb) |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1729 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1730 | else |
Felix Fietkau | 1f98ab7 | 2012-11-10 03:44:14 +0100 | [diff] [blame] | 1731 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1732 | return -1; |
| 1733 | } else if (unlikely(res == TX_QUEUED)) { |
Tomas Winkler | 5479d0e | 2008-06-28 03:15:03 +0300 | [diff] [blame] | 1734 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1735 | return -1; |
| 1736 | } |
| 1737 | |
| 1738 | return 0; |
| 1739 | } |
| 1740 | |
Felix Fietkau | 06be6b1 | 2013-10-14 18:01:00 +0200 | [diff] [blame] | 1741 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
| 1742 | struct ieee80211_vif *vif, struct sk_buff *skb, |
| 1743 | int band, struct ieee80211_sta **sta) |
| 1744 | { |
| 1745 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 1746 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1747 | struct ieee80211_tx_data tx; |
Johannes Berg | 88724a8 | 2015-03-01 09:10:12 +0200 | [diff] [blame] | 1748 | struct sk_buff *skb2; |
Felix Fietkau | 06be6b1 | 2013-10-14 18:01:00 +0200 | [diff] [blame] | 1749 | |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1750 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
Felix Fietkau | 06be6b1 | 2013-10-14 18:01:00 +0200 | [diff] [blame] | 1751 | return false; |
| 1752 | |
| 1753 | info->band = band; |
| 1754 | info->control.vif = vif; |
| 1755 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; |
| 1756 | |
| 1757 | if (invoke_tx_handlers(&tx)) |
| 1758 | return false; |
| 1759 | |
| 1760 | if (sta) { |
| 1761 | if (tx.sta) |
| 1762 | *sta = &tx.sta->sta; |
| 1763 | else |
| 1764 | *sta = NULL; |
| 1765 | } |
| 1766 | |
Johannes Berg | 88724a8 | 2015-03-01 09:10:12 +0200 | [diff] [blame] | 1767 | /* this function isn't suitable for fragmented data frames */ |
| 1768 | skb2 = __skb_dequeue(&tx.skbs); |
| 1769 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { |
| 1770 | ieee80211_free_txskb(hw, skb2); |
| 1771 | ieee80211_purge_tx_queue(hw, &tx.skbs); |
| 1772 | return false; |
| 1773 | } |
| 1774 | |
Felix Fietkau | 06be6b1 | 2013-10-14 18:01:00 +0200 | [diff] [blame] | 1775 | return true; |
| 1776 | } |
| 1777 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); |
| 1778 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1779 | /* |
| 1780 | * Returns false if the frame couldn't be transmitted but was queued instead. |
| 1781 | */ |
| 1782 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1783 | struct sta_info *sta, struct sk_buff *skb, |
| 1784 | bool txpending) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1785 | { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1786 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1787 | struct ieee80211_tx_data tx; |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1788 | ieee80211_tx_result res_prepare; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1789 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1790 | bool result = true; |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1791 | int led_len; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1792 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1793 | if (unlikely(skb->len < 10)) { |
| 1794 | dev_kfree_skb(skb); |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1795 | return true; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1796 | } |
| 1797 | |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1798 | /* initialises tx */ |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1799 | led_len = skb->len; |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1800 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1801 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1802 | if (unlikely(res_prepare == TX_DROP)) { |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1803 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1804 | return true; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1805 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1806 | return true; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1807 | } |
| 1808 | |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1809 | /* set up hw_queue value early */ |
| 1810 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 1811 | !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1812 | info->hw_queue = |
| 1813 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; |
| 1814 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1815 | if (!invoke_tx_handlers(&tx)) |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1816 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
| 1817 | tx.sta, txpending); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1818 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1819 | return result; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1820 | } |
| 1821 | |
| 1822 | /* device xmit handlers */ |
| 1823 | |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1824 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1825 | struct sk_buff *skb, |
| 1826 | int head_need, bool may_encrypt) |
| 1827 | { |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1828 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1829 | int tail_need = 0; |
| 1830 | |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1831 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1832 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
| 1833 | tail_need -= skb_tailroom(skb); |
| 1834 | tail_need = max_t(int, tail_need, 0); |
| 1835 | } |
| 1836 | |
Ido Yariv | c70f59a | 2014-07-29 15:39:14 +0300 | [diff] [blame] | 1837 | if (skb_cloned(skb) && |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 1838 | (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) || |
Ido Yariv | c70f59a | 2014-07-29 15:39:14 +0300 | [diff] [blame] | 1839 | !skb_clone_writable(skb, ETH_HLEN) || |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 1840 | (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt))) |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1841 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
Felix Fietkau | 4cd06a3 | 2010-12-18 19:30:49 +0100 | [diff] [blame] | 1842 | else if (head_need || tail_need) |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1843 | I802_DEBUG_INC(local->tx_expand_skb_head); |
Felix Fietkau | 4cd06a3 | 2010-12-18 19:30:49 +0100 | [diff] [blame] | 1844 | else |
| 1845 | return 0; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1846 | |
| 1847 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { |
Joe Perches | 0fb9a9e | 2010-08-20 16:25:38 -0700 | [diff] [blame] | 1848 | wiphy_debug(local->hw.wiphy, |
| 1849 | "failed to reallocate TX buffer\n"); |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1850 | return -ENOMEM; |
| 1851 | } |
| 1852 | |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1853 | return 0; |
| 1854 | } |
| 1855 | |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1856 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
| 1857 | struct sta_info *sta, struct sk_buff *skb) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1858 | { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1859 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1860 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 1861 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1862 | int headroom; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1863 | bool may_encrypt; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1864 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1865 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1866 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1867 | headroom = local->tx_headroom; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1868 | if (may_encrypt) |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1869 | headroom += sdata->encrypt_headroom; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1870 | headroom -= skb_headroom(skb); |
| 1871 | headroom = max_t(int, 0, headroom); |
| 1872 | |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1873 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1874 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1875 | return; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1876 | } |
| 1877 | |
Steve deRosier | 740c1aa | 2010-09-11 20:01:31 -0700 | [diff] [blame] | 1878 | hdr = (struct ieee80211_hdr *) skb->data; |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 1879 | info->control.vif = &sdata->vif; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1880 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 1881 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| 1882 | if (ieee80211_is_data(hdr->frame_control) && |
| 1883 | is_unicast_ether_addr(hdr->addr1)) { |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 1884 | if (mesh_nexthop_resolve(sdata, skb)) |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 1885 | return; /* skb queued: don't free */ |
| 1886 | } else { |
| 1887 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); |
| 1888 | } |
Johannes Berg | 98aed9f | 2012-03-27 14:18:36 +0200 | [diff] [blame] | 1889 | } |
Javier Cardona | cca8949 | 2009-08-10 17:29:29 -0700 | [diff] [blame] | 1890 | |
Javier Cardona | 2154c81 | 2011-09-07 17:49:53 -0700 | [diff] [blame] | 1891 | ieee80211_set_qos_hdr(sdata, skb); |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 1892 | ieee80211_tx(sdata, sta, skb, false); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1893 | } |
| 1894 | |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 1895 | static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local, |
| 1896 | struct sk_buff *skb) |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 1897 | { |
| 1898 | struct ieee80211_radiotap_iterator iterator; |
| 1899 | struct ieee80211_radiotap_header *rthdr = |
| 1900 | (struct ieee80211_radiotap_header *) skb->data; |
| 1901 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 1902 | struct ieee80211_supported_band *sband = |
| 1903 | local->hw.wiphy->bands[info->band]; |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 1904 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, |
| 1905 | NULL); |
| 1906 | u16 txflags; |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 1907 | u16 rate = 0; |
| 1908 | bool rate_found = false; |
| 1909 | u8 rate_retries = 0; |
| 1910 | u16 rate_flags = 0; |
Sven Eckelmann | f66b60f | 2016-02-24 16:25:49 +0100 | [diff] [blame] | 1911 | u8 mcs_known, mcs_flags, mcs_bw; |
Lorenzo Bianconi | 646e76b | 2016-02-23 15:43:35 +0100 | [diff] [blame] | 1912 | u16 vht_known; |
| 1913 | u8 vht_mcs = 0, vht_nss = 0; |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 1914 | int i; |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 1915 | |
| 1916 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
| 1917 | IEEE80211_TX_CTL_DONTFRAG; |
| 1918 | |
| 1919 | /* |
| 1920 | * for every radiotap entry that is present |
| 1921 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more |
| 1922 | * entries present, or -EINVAL on error) |
| 1923 | */ |
| 1924 | |
| 1925 | while (!ret) { |
| 1926 | ret = ieee80211_radiotap_iterator_next(&iterator); |
| 1927 | |
| 1928 | if (ret) |
| 1929 | continue; |
| 1930 | |
| 1931 | /* see if this argument is something we can use */ |
| 1932 | switch (iterator.this_arg_index) { |
| 1933 | /* |
| 1934 | * You must take care when dereferencing iterator.this_arg |
| 1935 | * for multibyte types... the pointer is not aligned. Use |
| 1936 | * get_unaligned((type *)iterator.this_arg) to dereference |
| 1937 | * iterator.this_arg for type "type" safely on all arches. |
| 1938 | */ |
| 1939 | case IEEE80211_RADIOTAP_FLAGS: |
| 1940 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { |
| 1941 | /* |
| 1942 | * this indicates that the skb we have been |
| 1943 | * handed has the 32-bit FCS CRC at the end... |
| 1944 | * we should react to that by snipping it off |
| 1945 | * because it will be recomputed and added |
| 1946 | * on transmission |
| 1947 | */ |
| 1948 | if (skb->len < (iterator._max_length + FCS_LEN)) |
| 1949 | return false; |
| 1950 | |
| 1951 | skb_trim(skb, skb->len - FCS_LEN); |
| 1952 | } |
| 1953 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) |
| 1954 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 1955 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) |
| 1956 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; |
| 1957 | break; |
| 1958 | |
| 1959 | case IEEE80211_RADIOTAP_TX_FLAGS: |
| 1960 | txflags = get_unaligned_le16(iterator.this_arg); |
| 1961 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) |
| 1962 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
| 1963 | break; |
| 1964 | |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 1965 | case IEEE80211_RADIOTAP_RATE: |
| 1966 | rate = *iterator.this_arg; |
| 1967 | rate_flags = 0; |
| 1968 | rate_found = true; |
| 1969 | break; |
| 1970 | |
| 1971 | case IEEE80211_RADIOTAP_DATA_RETRIES: |
| 1972 | rate_retries = *iterator.this_arg; |
| 1973 | break; |
| 1974 | |
| 1975 | case IEEE80211_RADIOTAP_MCS: |
| 1976 | mcs_known = iterator.this_arg[0]; |
| 1977 | mcs_flags = iterator.this_arg[1]; |
| 1978 | if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS)) |
| 1979 | break; |
| 1980 | |
| 1981 | rate_found = true; |
| 1982 | rate = iterator.this_arg[2]; |
| 1983 | rate_flags = IEEE80211_TX_RC_MCS; |
| 1984 | |
| 1985 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI && |
| 1986 | mcs_flags & IEEE80211_RADIOTAP_MCS_SGI) |
| 1987 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; |
| 1988 | |
Sven Eckelmann | f66b60f | 2016-02-24 16:25:49 +0100 | [diff] [blame] | 1989 | mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK; |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 1990 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW && |
Sven Eckelmann | f66b60f | 2016-02-24 16:25:49 +0100 | [diff] [blame] | 1991 | mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40) |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 1992 | rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
| 1993 | break; |
| 1994 | |
Lorenzo Bianconi | 646e76b | 2016-02-23 15:43:35 +0100 | [diff] [blame] | 1995 | case IEEE80211_RADIOTAP_VHT: |
| 1996 | vht_known = get_unaligned_le16(iterator.this_arg); |
| 1997 | rate_found = true; |
| 1998 | |
| 1999 | rate_flags = IEEE80211_TX_RC_VHT_MCS; |
| 2000 | if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) && |
| 2001 | (iterator.this_arg[2] & |
| 2002 | IEEE80211_RADIOTAP_VHT_FLAG_SGI)) |
| 2003 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; |
| 2004 | if (vht_known & |
| 2005 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) { |
| 2006 | if (iterator.this_arg[3] == 1) |
| 2007 | rate_flags |= |
| 2008 | IEEE80211_TX_RC_40_MHZ_WIDTH; |
| 2009 | else if (iterator.this_arg[3] == 4) |
| 2010 | rate_flags |= |
| 2011 | IEEE80211_TX_RC_80_MHZ_WIDTH; |
| 2012 | else if (iterator.this_arg[3] == 11) |
| 2013 | rate_flags |= |
| 2014 | IEEE80211_TX_RC_160_MHZ_WIDTH; |
| 2015 | } |
| 2016 | |
| 2017 | vht_mcs = iterator.this_arg[4] >> 4; |
| 2018 | vht_nss = iterator.this_arg[4] & 0xF; |
| 2019 | break; |
| 2020 | |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 2021 | /* |
| 2022 | * Please update the file |
| 2023 | * Documentation/networking/mac80211-injection.txt |
| 2024 | * when parsing new fields here. |
| 2025 | */ |
| 2026 | |
| 2027 | default: |
| 2028 | break; |
| 2029 | } |
| 2030 | } |
| 2031 | |
| 2032 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ |
| 2033 | return false; |
| 2034 | |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 2035 | if (rate_found) { |
| 2036 | info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT; |
| 2037 | |
| 2038 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
| 2039 | info->control.rates[i].idx = -1; |
| 2040 | info->control.rates[i].flags = 0; |
| 2041 | info->control.rates[i].count = 0; |
| 2042 | } |
| 2043 | |
| 2044 | if (rate_flags & IEEE80211_TX_RC_MCS) { |
| 2045 | info->control.rates[0].idx = rate; |
Lorenzo Bianconi | 646e76b | 2016-02-23 15:43:35 +0100 | [diff] [blame] | 2046 | } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) { |
| 2047 | ieee80211_rate_set_vht(info->control.rates, vht_mcs, |
| 2048 | vht_nss); |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 2049 | } else { |
| 2050 | for (i = 0; i < sband->n_bitrates; i++) { |
| 2051 | if (rate * 5 != sband->bitrates[i].bitrate) |
| 2052 | continue; |
| 2053 | |
| 2054 | info->control.rates[0].idx = i; |
| 2055 | break; |
| 2056 | } |
| 2057 | } |
| 2058 | |
Felix Fietkau | 07310a6 | 2016-03-02 15:54:51 +0100 | [diff] [blame] | 2059 | if (info->control.rates[0].idx < 0) |
| 2060 | info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT; |
| 2061 | |
Sven Eckelmann | dfdfc2b | 2016-01-26 17:11:13 +0100 | [diff] [blame] | 2062 | info->control.rates[0].flags = rate_flags; |
| 2063 | info->control.rates[0].count = min_t(u8, rate_retries + 1, |
| 2064 | local->hw.max_rate_tries); |
| 2065 | } |
| 2066 | |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 2067 | /* |
| 2068 | * remove the radiotap header |
| 2069 | * iterator->_max_length was sanity-checked against |
| 2070 | * skb->len by iterator init |
| 2071 | */ |
| 2072 | skb_pull(skb, iterator._max_length); |
| 2073 | |
| 2074 | return true; |
| 2075 | } |
| 2076 | |
Stephen Hemminger | d0cf9c0 | 2009-08-31 19:50:57 +0000 | [diff] [blame] | 2077 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
| 2078 | struct net_device *dev) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2079 | { |
| 2080 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2081 | struct ieee80211_chanctx_conf *chanctx_conf; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2082 | struct ieee80211_radiotap_header *prthdr = |
| 2083 | (struct ieee80211_radiotap_header *)skb->data; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2084 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Helmut Schaa | f75f5c6 | 2011-08-01 11:32:52 +0200 | [diff] [blame] | 2085 | struct ieee80211_hdr *hdr; |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2086 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
Janusz Dziedzic | b493283 | 2014-06-05 08:12:57 +0200 | [diff] [blame] | 2087 | struct cfg80211_chan_def *chandef; |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 2088 | u16 len_rthdr; |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2089 | int hdrlen; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2090 | |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 2091 | /* check for not even having the fixed radiotap header part */ |
| 2092 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) |
| 2093 | goto fail; /* too short to be possibly valid */ |
| 2094 | |
| 2095 | /* is it a header version we can trust to find length from? */ |
| 2096 | if (unlikely(prthdr->it_version)) |
| 2097 | goto fail; /* only version 0 is supported */ |
| 2098 | |
| 2099 | /* then there must be a radiotap header with a length we can use */ |
| 2100 | len_rthdr = ieee80211_get_radiotap_len(skb->data); |
| 2101 | |
| 2102 | /* does the skb contain enough to deliver on the alleged length? */ |
| 2103 | if (unlikely(skb->len < len_rthdr)) |
| 2104 | goto fail; /* skb too short for claimed rt header extent */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2105 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2106 | /* |
| 2107 | * fix up the pointers accounting for the radiotap |
| 2108 | * header still being in there. We are being given |
| 2109 | * a precooked IEEE80211 header so no need for |
| 2110 | * normal processing |
| 2111 | */ |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 2112 | skb_set_mac_header(skb, len_rthdr); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2113 | /* |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 2114 | * these are just fixed to the end of the rt area since we |
| 2115 | * don't have any better information and at this point, nobody cares |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2116 | */ |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 2117 | skb_set_network_header(skb, len_rthdr); |
| 2118 | skb_set_transport_header(skb, len_rthdr); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2119 | |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2120 | if (skb->len < len_rthdr + 2) |
| 2121 | goto fail; |
| 2122 | |
| 2123 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); |
| 2124 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| 2125 | |
| 2126 | if (skb->len < len_rthdr + hdrlen) |
| 2127 | goto fail; |
| 2128 | |
Helmut Schaa | f75f5c6 | 2011-08-01 11:32:52 +0200 | [diff] [blame] | 2129 | /* |
| 2130 | * Initialize skb->protocol if the injected frame is a data frame |
| 2131 | * carrying a rfc1042 header |
| 2132 | */ |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2133 | if (ieee80211_is_data(hdr->frame_control) && |
| 2134 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { |
| 2135 | u8 *payload = (u8 *)hdr + hdrlen; |
| 2136 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2137 | if (ether_addr_equal(payload, rfc1042_header)) |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2138 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
| 2139 | payload[7]); |
Helmut Schaa | f75f5c6 | 2011-08-01 11:32:52 +0200 | [diff] [blame] | 2140 | } |
| 2141 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2142 | memset(info, 0, sizeof(*info)); |
| 2143 | |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2144 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 2145 | IEEE80211_TX_CTL_INJECTED; |
| 2146 | |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2147 | rcu_read_lock(); |
| 2148 | |
| 2149 | /* |
| 2150 | * We process outgoing injected frames that have a local address |
| 2151 | * we handle as though they are non-injected frames. |
| 2152 | * This code here isn't entirely correct, the local MAC address |
| 2153 | * isn't always enough to find the interface to use; for proper |
| 2154 | * VLAN/WDS support we will need a different mechanism (which |
| 2155 | * likely isn't going to be monitor interfaces). |
| 2156 | */ |
| 2157 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2158 | |
| 2159 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { |
| 2160 | if (!ieee80211_sdata_running(tmp_sdata)) |
| 2161 | continue; |
| 2162 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| 2163 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 2164 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) |
| 2165 | continue; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2166 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2167 | sdata = tmp_sdata; |
| 2168 | break; |
| 2169 | } |
| 2170 | } |
Johannes Berg | 7351c6b | 2009-11-19 01:08:30 +0100 | [diff] [blame] | 2171 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2172 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 2173 | if (!chanctx_conf) { |
| 2174 | tmp_sdata = rcu_dereference(local->monitor_sdata); |
| 2175 | if (tmp_sdata) |
| 2176 | chanctx_conf = |
| 2177 | rcu_dereference(tmp_sdata->vif.chanctx_conf); |
| 2178 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2179 | |
Felix Fietkau | b4a7ff7 | 2013-01-13 23:10:26 +0100 | [diff] [blame] | 2180 | if (chanctx_conf) |
Janusz Dziedzic | b493283 | 2014-06-05 08:12:57 +0200 | [diff] [blame] | 2181 | chandef = &chanctx_conf->def; |
Felix Fietkau | b4a7ff7 | 2013-01-13 23:10:26 +0100 | [diff] [blame] | 2182 | else if (!local->use_chanctx) |
Janusz Dziedzic | b493283 | 2014-06-05 08:12:57 +0200 | [diff] [blame] | 2183 | chandef = &local->_oper_chandef; |
Felix Fietkau | b4a7ff7 | 2013-01-13 23:10:26 +0100 | [diff] [blame] | 2184 | else |
| 2185 | goto fail_rcu; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2186 | |
| 2187 | /* |
| 2188 | * Frame injection is not allowed if beaconing is not allowed |
| 2189 | * or if we need radar detection. Beaconing is usually not allowed when |
| 2190 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. |
| 2191 | * Passive scan is also used in world regulatory domains where |
| 2192 | * your country is not known and as such it should be treated as |
| 2193 | * NO TX unless the channel is explicitly allowed in which case |
| 2194 | * your current regulatory domain would not have the passive scan |
| 2195 | * flag. |
| 2196 | * |
| 2197 | * Since AP mode uses monitor interfaces to inject/TX management |
| 2198 | * frames we can make AP mode the exception to this rule once it |
| 2199 | * supports radar detection as its implementation can deal with |
| 2200 | * radar detection by itself. We can do that later by adding a |
| 2201 | * monitor flag interfaces used for AP support. |
| 2202 | */ |
Janusz Dziedzic | b493283 | 2014-06-05 08:12:57 +0200 | [diff] [blame] | 2203 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
| 2204 | sdata->vif.type)) |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2205 | goto fail_rcu; |
| 2206 | |
Johannes Berg | 73c4e19 | 2014-11-09 18:50:09 +0200 | [diff] [blame] | 2207 | info->band = chandef->chan->band; |
Lorenzo Bianconi | 109843b0 | 2016-02-19 12:18:01 +0100 | [diff] [blame] | 2208 | |
| 2209 | /* process and remove the injection radiotap header */ |
| 2210 | if (!ieee80211_parse_tx_radiotap(local, skb)) |
| 2211 | goto fail_rcu; |
| 2212 | |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 2213 | ieee80211_xmit(sdata, NULL, skb); |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 2214 | rcu_read_unlock(); |
| 2215 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2216 | return NETDEV_TX_OK; |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 2217 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2218 | fail_rcu: |
| 2219 | rcu_read_unlock(); |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 2220 | fail: |
| 2221 | dev_kfree_skb(skb); |
| 2222 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2223 | } |
| 2224 | |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2225 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 2226 | { |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2227 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 2228 | |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2229 | return ethertype == ETH_P_TDLS && |
| 2230 | skb->len > 14 && |
| 2231 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; |
| 2232 | } |
| 2233 | |
| 2234 | static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, |
| 2235 | struct sk_buff *skb, |
| 2236 | struct sta_info **sta_out) |
| 2237 | { |
| 2238 | struct sta_info *sta; |
| 2239 | |
| 2240 | switch (sdata->vif.type) { |
| 2241 | case NL80211_IFTYPE_AP_VLAN: |
| 2242 | sta = rcu_dereference(sdata->u.vlan.sta); |
| 2243 | if (sta) { |
| 2244 | *sta_out = sta; |
| 2245 | return 0; |
| 2246 | } else if (sdata->wdev.use_4addr) { |
| 2247 | return -ENOLINK; |
| 2248 | } |
| 2249 | /* fall through */ |
| 2250 | case NL80211_IFTYPE_AP: |
| 2251 | case NL80211_IFTYPE_OCB: |
| 2252 | case NL80211_IFTYPE_ADHOC: |
| 2253 | if (is_multicast_ether_addr(skb->data)) { |
| 2254 | *sta_out = ERR_PTR(-ENOENT); |
| 2255 | return 0; |
| 2256 | } |
| 2257 | sta = sta_info_get_bss(sdata, skb->data); |
| 2258 | break; |
| 2259 | case NL80211_IFTYPE_WDS: |
| 2260 | sta = sta_info_get(sdata, sdata->u.wds.remote_addr); |
| 2261 | break; |
| 2262 | #ifdef CONFIG_MAC80211_MESH |
| 2263 | case NL80211_IFTYPE_MESH_POINT: |
| 2264 | /* determined much later */ |
| 2265 | *sta_out = NULL; |
| 2266 | return 0; |
| 2267 | #endif |
| 2268 | case NL80211_IFTYPE_STATION: |
| 2269 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
| 2270 | sta = sta_info_get(sdata, skb->data); |
| 2271 | if (sta) { |
| 2272 | bool tdls_peer, tdls_auth; |
| 2273 | |
| 2274 | tdls_peer = test_sta_flag(sta, |
| 2275 | WLAN_STA_TDLS_PEER); |
| 2276 | tdls_auth = test_sta_flag(sta, |
| 2277 | WLAN_STA_TDLS_PEER_AUTH); |
| 2278 | |
| 2279 | if (tdls_peer && tdls_auth) { |
| 2280 | *sta_out = sta; |
| 2281 | return 0; |
| 2282 | } |
| 2283 | |
| 2284 | /* |
| 2285 | * TDLS link during setup - throw out frames to |
| 2286 | * peer. Allow TDLS-setup frames to unauthorized |
| 2287 | * peers for the special case of a link teardown |
| 2288 | * after a TDLS sta is removed due to being |
| 2289 | * unreachable. |
| 2290 | */ |
| 2291 | if (tdls_peer && !tdls_auth && |
| 2292 | !ieee80211_is_tdls_setup(skb)) |
| 2293 | return -EINVAL; |
| 2294 | } |
| 2295 | |
| 2296 | } |
| 2297 | |
| 2298 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); |
| 2299 | if (!sta) |
| 2300 | return -ENOLINK; |
| 2301 | break; |
| 2302 | default: |
| 2303 | return -EINVAL; |
| 2304 | } |
| 2305 | |
| 2306 | *sta_out = sta ?: ERR_PTR(-ENOENT); |
| 2307 | return 0; |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 2308 | } |
| 2309 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2310 | /** |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2311 | * ieee80211_build_hdr - build 802.11 header in the given frame |
| 2312 | * @sdata: virtual interface to build the header for |
| 2313 | * @skb: the skb to build the header in |
Liad Kaufman | 24d342c | 2014-11-09 18:50:07 +0200 | [diff] [blame] | 2314 | * @info_flags: skb flags to set |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2315 | * |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2316 | * This function takes the skb with 802.3 header and reformats the header to |
| 2317 | * the appropriate IEEE 802.11 header based on which interface the packet is |
| 2318 | * being transmitted on. |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2319 | * |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2320 | * Note that this function also takes care of the TX status request and |
| 2321 | * potential unsharing of the SKB - this needs to be interleaved with the |
| 2322 | * header building. |
| 2323 | * |
| 2324 | * The function requires the read-side RCU lock held |
| 2325 | * |
| 2326 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2327 | */ |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2328 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 2329 | struct sk_buff *skb, u32 info_flags, |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2330 | struct sta_info *sta) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2331 | { |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 2332 | struct ieee80211_local *local = sdata->local; |
Felix Fietkau | 489ee91 | 2010-12-18 19:30:48 +0100 | [diff] [blame] | 2333 | struct ieee80211_tx_info *info; |
Johannes Berg | dcf3396 | 2012-07-30 15:11:56 +0200 | [diff] [blame] | 2334 | int head_need; |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2335 | u16 ethertype, hdrlen, meshhdrlen = 0; |
| 2336 | __le16 fc; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2337 | struct ieee80211_hdr hdr; |
Wey-Yi Guy | ff67bb8 | 2010-08-21 07:23:29 -0700 | [diff] [blame] | 2338 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
Chun-Yeow Yeoh | b8bacc1 | 2012-05-30 09:30:41 +0800 | [diff] [blame] | 2339 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2340 | const u8 *encaps_data; |
| 2341 | int encaps_len, skip_header_bytes; |
Jiri Slaby | e8bf964 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 2342 | int nh_pos, h_pos; |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2343 | bool wme_sta = false, authorized = false; |
| 2344 | bool tdls_peer; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2345 | bool multicast; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2346 | u16 info_id = 0; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2347 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 2348 | struct ieee80211_sub_if_data *ap_sdata; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 2349 | enum nl80211_band band; |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2350 | int ret; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2351 | |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2352 | if (IS_ERR(sta)) |
| 2353 | sta = NULL; |
| 2354 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2355 | /* convert Ethernet header to proper 802.11 header (based on |
| 2356 | * operation mode) */ |
| 2357 | ethertype = (skb->data[12] << 8) | skb->data[13]; |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2358 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2359 | |
Johannes Berg | 51fb61e | 2007-12-19 01:31:27 +0100 | [diff] [blame] | 2360 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2361 | case NL80211_IFTYPE_AP_VLAN: |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2362 | if (sdata->wdev.use_4addr) { |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2363 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
| 2364 | /* RA TA DA SA */ |
| 2365 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2366 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2367 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 2368 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); |
| 2369 | hdrlen = 30; |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 2370 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
Johannes Berg | a74a8c8 | 2014-07-22 14:50:47 +0200 | [diff] [blame] | 2371 | wme_sta = sta->sta.wme; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2372 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2373 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
| 2374 | u.ap); |
| 2375 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2376 | if (!chanctx_conf) { |
| 2377 | ret = -ENOTCONN; |
| 2378 | goto free; |
| 2379 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2380 | band = chanctx_conf->def.chan->band; |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2381 | if (sdata->wdev.use_4addr) |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2382 | break; |
| 2383 | /* fall through */ |
| 2384 | case NL80211_IFTYPE_AP: |
Arnd Bergmann | fe80123 | 2013-01-25 14:14:33 +0000 | [diff] [blame] | 2385 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 2386 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2387 | if (!chanctx_conf) { |
| 2388 | ret = -ENOTCONN; |
| 2389 | goto free; |
| 2390 | } |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2391 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2392 | /* DA BSSID SA */ |
| 2393 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2394 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2395 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
| 2396 | hdrlen = 24; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2397 | band = chanctx_conf->def.chan->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 2398 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2399 | case NL80211_IFTYPE_WDS: |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2400 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2401 | /* RA TA DA SA */ |
| 2402 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2403 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2404 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 2405 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); |
| 2406 | hdrlen = 30; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2407 | /* |
| 2408 | * This is the exception! WDS style interfaces are prohibited |
| 2409 | * when channel contexts are in used so this must be valid |
| 2410 | */ |
Karl Beldan | 675a0b0 | 2013-03-25 16:26:57 +0100 | [diff] [blame] | 2411 | band = local->hw.conf.chandef.chan->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 2412 | break; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 2413 | #ifdef CONFIG_MAC80211_MESH |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2414 | case NL80211_IFTYPE_MESH_POINT: |
Chun-Yeow Yeoh | b8bacc1 | 2012-05-30 09:30:41 +0800 | [diff] [blame] | 2415 | if (!is_multicast_ether_addr(skb->data)) { |
Chun-Yeow Yeoh | 163df6c | 2013-02-19 10:04:50 +0800 | [diff] [blame] | 2416 | struct sta_info *next_hop; |
| 2417 | bool mpp_lookup = true; |
| 2418 | |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2419 | mpath = mesh_path_lookup(sdata, skb->data); |
Chun-Yeow Yeoh | 163df6c | 2013-02-19 10:04:50 +0800 | [diff] [blame] | 2420 | if (mpath) { |
| 2421 | mpp_lookup = false; |
| 2422 | next_hop = rcu_dereference(mpath->next_hop); |
| 2423 | if (!next_hop || |
| 2424 | !(mpath->flags & (MESH_PATH_ACTIVE | |
| 2425 | MESH_PATH_RESOLVING))) |
| 2426 | mpp_lookup = true; |
| 2427 | } |
| 2428 | |
Henning Rogge | ab1c790 | 2016-02-03 13:58:37 +0100 | [diff] [blame] | 2429 | if (mpp_lookup) { |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2430 | mppath = mpp_path_lookup(sdata, skb->data); |
Henning Rogge | ab1c790 | 2016-02-03 13:58:37 +0100 | [diff] [blame] | 2431 | if (mppath) |
| 2432 | mppath->exp_time = jiffies; |
| 2433 | } |
Chun-Yeow Yeoh | 163df6c | 2013-02-19 10:04:50 +0800 | [diff] [blame] | 2434 | |
| 2435 | if (mppath && mpath) |
Bob Copeland | 2bdaf38 | 2016-02-28 20:03:56 -0500 | [diff] [blame] | 2436 | mesh_path_del(sdata, mpath->dst); |
Chun-Yeow Yeoh | b8bacc1 | 2012-05-30 09:30:41 +0800 | [diff] [blame] | 2437 | } |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2438 | |
Joel A Fernandes | f76b57b | 2010-12-28 19:28:11 -0600 | [diff] [blame] | 2439 | /* |
Joel A Fernandes | 9d52501 | 2011-01-10 00:44:23 -0600 | [diff] [blame] | 2440 | * Use address extension if it is a packet from |
| 2441 | * another interface or if we know the destination |
| 2442 | * is being proxied by a portal (i.e. portal address |
| 2443 | * differs from proxied address) |
Joel A Fernandes | f76b57b | 2010-12-28 19:28:11 -0600 | [diff] [blame] | 2444 | */ |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2445 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
| 2446 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2447 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
| 2448 | skb->data, skb->data + ETH_ALEN); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2449 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
| 2450 | NULL, NULL); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2451 | } else { |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 2452 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
| 2453 | * For unicast with unknown forwarding information, |
| 2454 | * destination might be in the MBSS or if that fails |
| 2455 | * forwarded to another mesh gate. In either case |
| 2456 | * resolution will be handled in ieee80211_xmit(), so |
| 2457 | * leave the original DA. This also works for mcast */ |
| 2458 | const u8 *mesh_da = skb->data; |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2459 | |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 2460 | if (mppath) |
| 2461 | mesh_da = mppath->mpp; |
| 2462 | else if (mpath) |
| 2463 | mesh_da = mpath->dst; |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 2464 | |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2465 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2466 | mesh_da, sdata->vif.addr); |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 2467 | if (is_multicast_ether_addr(mesh_da)) |
| 2468 | /* DA TA mSA AE:SA */ |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2469 | meshhdrlen = ieee80211_new_mesh_header( |
| 2470 | sdata, &mesh_hdr, |
| 2471 | skb->data + ETH_ALEN, NULL); |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2472 | else |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 2473 | /* RA TA mDA mSA AE:DA SA */ |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2474 | meshhdrlen = ieee80211_new_mesh_header( |
| 2475 | sdata, &mesh_hdr, skb->data, |
| 2476 | skb->data + ETH_ALEN); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2477 | |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2478 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2479 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2480 | if (!chanctx_conf) { |
| 2481 | ret = -ENOTCONN; |
| 2482 | goto free; |
| 2483 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2484 | band = chanctx_conf->def.chan->band; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 2485 | break; |
| 2486 | #endif |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2487 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2488 | /* we already did checks when looking up the RA STA */ |
| 2489 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 2490 | |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2491 | if (tdls_peer) { |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 2492 | /* DA SA BSSID */ |
| 2493 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| 2494 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| 2495 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); |
| 2496 | hdrlen = 24; |
| 2497 | } else if (sdata->u.mgd.use_4addr && |
| 2498 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { |
| 2499 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | |
| 2500 | IEEE80211_FCTL_TODS); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2501 | /* RA TA DA SA */ |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 2502 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2503 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2504 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 2505 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); |
| 2506 | hdrlen = 30; |
| 2507 | } else { |
| 2508 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
| 2509 | /* BSSID SA DA */ |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 2510 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2511 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| 2512 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 2513 | hdrlen = 24; |
| 2514 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2515 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2516 | if (!chanctx_conf) { |
| 2517 | ret = -ENOTCONN; |
| 2518 | goto free; |
| 2519 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2520 | band = chanctx_conf->def.chan->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 2521 | break; |
Rostislav Lisovy | 239281f | 2014-11-03 10:33:19 +0100 | [diff] [blame] | 2522 | case NL80211_IFTYPE_OCB: |
| 2523 | /* DA SA BSSID */ |
| 2524 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| 2525 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| 2526 | eth_broadcast_addr(hdr.addr3); |
| 2527 | hdrlen = 24; |
| 2528 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2529 | if (!chanctx_conf) { |
| 2530 | ret = -ENOTCONN; |
| 2531 | goto free; |
| 2532 | } |
Rostislav Lisovy | 239281f | 2014-11-03 10:33:19 +0100 | [diff] [blame] | 2533 | band = chanctx_conf->def.chan->band; |
| 2534 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2535 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2536 | /* DA SA BSSID */ |
| 2537 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| 2538 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2539 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2540 | hdrlen = 24; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2541 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2542 | if (!chanctx_conf) { |
| 2543 | ret = -ENOTCONN; |
| 2544 | goto free; |
| 2545 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2546 | band = chanctx_conf->def.chan->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 2547 | break; |
| 2548 | default: |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2549 | ret = -EINVAL; |
| 2550 | goto free; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2551 | } |
| 2552 | |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2553 | multicast = is_multicast_ether_addr(hdr.addr1); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2554 | |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 2555 | /* sta is always NULL for mesh */ |
| 2556 | if (sta) { |
| 2557 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
| 2558 | wme_sta = sta->sta.wme; |
| 2559 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| 2560 | /* For mesh, the use of the QoS header is mandatory */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 2561 | wme_sta = true; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2562 | } |
| 2563 | |
Johannes Berg | 527871d | 2015-03-21 08:09:55 +0100 | [diff] [blame] | 2564 | /* receiver does QoS (which also means we do) use it */ |
| 2565 | if (wme_sta) { |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2566 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2567 | hdrlen += 2; |
| 2568 | } |
| 2569 | |
| 2570 | /* |
Johannes Berg | 238814f | 2008-01-28 17:19:37 +0100 | [diff] [blame] | 2571 | * Drop unicast frames to unauthorised stations unless they are |
| 2572 | * EAPOL frames from the local station. |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2573 | */ |
Johannes Berg | 55182e4 | 2011-10-12 17:28:21 +0200 | [diff] [blame] | 2574 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
Rostislav Lisovy | 239281f | 2014-11-03 10:33:19 +0100 | [diff] [blame] | 2575 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
Sergey Ryazanov | a6ececf | 2013-08-30 01:35:09 +0400 | [diff] [blame] | 2576 | !multicast && !authorized && |
Johannes Berg | 55182e4 | 2011-10-12 17:28:21 +0200 | [diff] [blame] | 2577 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2578 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2579 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 2580 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2581 | sdata->name, hdr.addr1); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2582 | #endif |
| 2583 | |
| 2584 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); |
| 2585 | |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2586 | ret = -EPERM; |
| 2587 | goto free; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2588 | } |
| 2589 | |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2590 | if (unlikely(!multicast && skb->sk && |
| 2591 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { |
Alexander Duyck | bf7fa55 | 2014-09-10 18:05:42 -0400 | [diff] [blame] | 2592 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2593 | |
Alexander Duyck | bf7fa55 | 2014-09-10 18:05:42 -0400 | [diff] [blame] | 2594 | if (ack_skb) { |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2595 | unsigned long flags; |
Tejun Heo | 9475af6 | 2013-02-27 17:04:59 -0800 | [diff] [blame] | 2596 | int id; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2597 | |
| 2598 | spin_lock_irqsave(&local->ack_status_lock, flags); |
Alexander Duyck | bf7fa55 | 2014-09-10 18:05:42 -0400 | [diff] [blame] | 2599 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
Tejun Heo | 9475af6 | 2013-02-27 17:04:59 -0800 | [diff] [blame] | 2600 | 1, 0x10000, GFP_ATOMIC); |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2601 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
| 2602 | |
Tejun Heo | 9475af6 | 2013-02-27 17:04:59 -0800 | [diff] [blame] | 2603 | if (id >= 0) { |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2604 | info_id = id; |
| 2605 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2606 | } else { |
Alexander Duyck | bf7fa55 | 2014-09-10 18:05:42 -0400 | [diff] [blame] | 2607 | kfree_skb(ack_skb); |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2608 | } |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2609 | } |
| 2610 | } |
| 2611 | |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2612 | /* |
| 2613 | * If the skb is shared we need to obtain our own copy. |
| 2614 | */ |
| 2615 | if (skb_shared(skb)) { |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2616 | struct sk_buff *tmp_skb = skb; |
| 2617 | |
| 2618 | /* can't happen -- skb is a clone if info_id != 0 */ |
| 2619 | WARN_ON(info_id); |
| 2620 | |
Felix Fietkau | f8a0a78 | 2010-12-18 19:30:50 +0100 | [diff] [blame] | 2621 | skb = skb_clone(skb, GFP_ATOMIC); |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2622 | kfree_skb(tmp_skb); |
| 2623 | |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2624 | if (!skb) { |
| 2625 | ret = -ENOMEM; |
| 2626 | goto free; |
| 2627 | } |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2628 | } |
| 2629 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2630 | hdr.frame_control = fc; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2631 | hdr.duration_id = 0; |
| 2632 | hdr.seq_ctrl = 0; |
| 2633 | |
| 2634 | skip_header_bytes = ETH_HLEN; |
| 2635 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { |
| 2636 | encaps_data = bridge_tunnel_header; |
| 2637 | encaps_len = sizeof(bridge_tunnel_header); |
| 2638 | skip_header_bytes -= 2; |
Simon Horman | e5c5d22 | 2013-03-28 13:38:25 +0900 | [diff] [blame] | 2639 | } else if (ethertype >= ETH_P_802_3_MIN) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2640 | encaps_data = rfc1042_header; |
| 2641 | encaps_len = sizeof(rfc1042_header); |
| 2642 | skip_header_bytes -= 2; |
| 2643 | } else { |
| 2644 | encaps_data = NULL; |
| 2645 | encaps_len = 0; |
| 2646 | } |
| 2647 | |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2648 | nh_pos = skb_network_header(skb) - skb->data; |
| 2649 | h_pos = skb_transport_header(skb) - skb->data; |
| 2650 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2651 | skb_pull(skb, skip_header_bytes); |
| 2652 | nh_pos -= skip_header_bytes; |
| 2653 | h_pos -= skip_header_bytes; |
| 2654 | |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 2655 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2656 | |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 2657 | /* |
| 2658 | * So we need to modify the skb header and hence need a copy of |
| 2659 | * that. The head_need variable above doesn't, so far, include |
| 2660 | * the needed header space that we don't need right away. If we |
| 2661 | * can, then we don't reallocate right now but only after the |
| 2662 | * frame arrives at the master device (if it does...) |
| 2663 | * |
| 2664 | * If we cannot, however, then we will reallocate to include all |
| 2665 | * the ever needed space. Also, if we need to reallocate it anyway, |
| 2666 | * make it big enough for everything we may ever need. |
| 2667 | */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2668 | |
David S. Miller | 3a5be7d | 2008-06-18 01:19:51 -0700 | [diff] [blame] | 2669 | if (head_need > 0 || skb_cloned(skb)) { |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 2670 | head_need += sdata->encrypt_headroom; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 2671 | head_need += local->tx_headroom; |
| 2672 | head_need = max_t(int, 0, head_need); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 2673 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
| 2674 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 1c963be | 2012-11-07 14:02:30 +0100 | [diff] [blame] | 2675 | skb = NULL; |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2676 | return ERR_PTR(-ENOMEM); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 2677 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2678 | } |
| 2679 | |
| 2680 | if (encaps_data) { |
| 2681 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
| 2682 | nh_pos += encaps_len; |
| 2683 | h_pos += encaps_len; |
| 2684 | } |
Johannes Berg | c29b9b9 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 2685 | |
Yuri Ershov | e4ab7eb | 2010-06-29 15:08:06 +0400 | [diff] [blame] | 2686 | #ifdef CONFIG_MAC80211_MESH |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 2687 | if (meshhdrlen > 0) { |
| 2688 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); |
| 2689 | nh_pos += meshhdrlen; |
| 2690 | h_pos += meshhdrlen; |
| 2691 | } |
Yuri Ershov | e4ab7eb | 2010-06-29 15:08:06 +0400 | [diff] [blame] | 2692 | #endif |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 2693 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2694 | if (ieee80211_is_data_qos(fc)) { |
Johannes Berg | c29b9b9 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 2695 | __le16 *qos_control; |
| 2696 | |
Weilong Chen | f359d3f | 2013-12-18 15:44:16 +0800 | [diff] [blame] | 2697 | qos_control = (__le16 *) skb_push(skb, 2); |
Johannes Berg | c29b9b9 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 2698 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
| 2699 | /* |
| 2700 | * Maybe we could actually set some fields here, for now just |
| 2701 | * initialise to zero to indicate no special operation. |
| 2702 | */ |
| 2703 | *qos_control = 0; |
| 2704 | } else |
| 2705 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); |
| 2706 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2707 | nh_pos += hdrlen; |
| 2708 | h_pos += hdrlen; |
| 2709 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2710 | /* Update skb pointers to various headers since this modified frame |
| 2711 | * is going to go through Linux networking code that may potentially |
| 2712 | * need things like pointer to IP header. */ |
Zhang Shengju | d57a544 | 2016-03-03 01:16:56 +0000 | [diff] [blame] | 2713 | skb_reset_mac_header(skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2714 | skb_set_network_header(skb, nh_pos); |
| 2715 | skb_set_transport_header(skb, h_pos); |
| 2716 | |
Felix Fietkau | 489ee91 | 2010-12-18 19:30:48 +0100 | [diff] [blame] | 2717 | info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2718 | memset(info, 0, sizeof(*info)); |
| 2719 | |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2720 | info->flags = info_flags; |
| 2721 | info->ack_frame_id = info_id; |
Johannes Berg | 73c4e19 | 2014-11-09 18:50:09 +0200 | [diff] [blame] | 2722 | info->band = band; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2723 | |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 2724 | return skb; |
| 2725 | free: |
| 2726 | kfree_skb(skb); |
| 2727 | return ERR_PTR(ret); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2728 | } |
| 2729 | |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2730 | /* |
| 2731 | * fast-xmit overview |
| 2732 | * |
| 2733 | * The core idea of this fast-xmit is to remove per-packet checks by checking |
| 2734 | * them out of band. ieee80211_check_fast_xmit() implements the out-of-band |
| 2735 | * checks that are needed to get the sta->fast_tx pointer assigned, after which |
| 2736 | * much less work can be done per packet. For example, fragmentation must be |
| 2737 | * disabled or the fast_tx pointer will not be set. All the conditions are seen |
| 2738 | * in the code here. |
| 2739 | * |
| 2740 | * Once assigned, the fast_tx data structure also caches the per-packet 802.11 |
| 2741 | * header and other data to aid packet processing in ieee80211_xmit_fast(). |
| 2742 | * |
| 2743 | * The most difficult part of this is that when any of these assumptions |
| 2744 | * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(), |
| 2745 | * ieee80211_check_fast_xmit() or friends) is required to reset the data, |
| 2746 | * since the per-packet code no longer checks the conditions. This is reflected |
| 2747 | * by the calls to these functions throughout the rest of the code, and must be |
| 2748 | * maintained if any of the TX path checks change. |
| 2749 | */ |
| 2750 | |
| 2751 | void ieee80211_check_fast_xmit(struct sta_info *sta) |
| 2752 | { |
| 2753 | struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old; |
| 2754 | struct ieee80211_local *local = sta->local; |
| 2755 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 2756 | struct ieee80211_hdr *hdr = (void *)build.hdr; |
| 2757 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 2758 | __le16 fc; |
| 2759 | |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 2760 | if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT)) |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2761 | return; |
| 2762 | |
| 2763 | /* Locking here protects both the pointer itself, and against concurrent |
| 2764 | * invocations winning data access races to, e.g., the key pointer that |
| 2765 | * is used. |
| 2766 | * Without it, the invocation of this function right after the key |
| 2767 | * pointer changes wouldn't be sufficient, as another CPU could access |
| 2768 | * the pointer, then stall, and then do the cache update after the CPU |
| 2769 | * that invalidated the key. |
| 2770 | * With the locking, such scenarios cannot happen as the check for the |
| 2771 | * key and the fast-tx assignment are done atomically, so the CPU that |
| 2772 | * modifies the key will either wait or other one will see the key |
| 2773 | * cleared/changed already. |
| 2774 | */ |
| 2775 | spin_lock_bh(&sta->lock); |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 2776 | if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) && |
| 2777 | !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) && |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2778 | sdata->vif.type == NL80211_IFTYPE_STATION) |
| 2779 | goto out; |
| 2780 | |
| 2781 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) |
| 2782 | goto out; |
| 2783 | |
| 2784 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
| 2785 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
Felix Fietkau | f7418bc | 2015-09-24 14:59:49 +0200 | [diff] [blame] | 2786 | test_sta_flag(sta, WLAN_STA_PS_DELIVER) || |
| 2787 | test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT)) |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2788 | goto out; |
| 2789 | |
| 2790 | if (sdata->noack_map) |
| 2791 | goto out; |
| 2792 | |
| 2793 | /* fast-xmit doesn't handle fragmentation at all */ |
Johannes Berg | 725b812 | 2015-04-10 14:02:08 +0200 | [diff] [blame] | 2794 | if (local->hw.wiphy->frag_threshold != (u32)-1 && |
| 2795 | !local->ops->set_frag_threshold) |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2796 | goto out; |
| 2797 | |
| 2798 | rcu_read_lock(); |
| 2799 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 2800 | if (!chanctx_conf) { |
| 2801 | rcu_read_unlock(); |
| 2802 | goto out; |
| 2803 | } |
| 2804 | build.band = chanctx_conf->def.chan->band; |
| 2805 | rcu_read_unlock(); |
| 2806 | |
| 2807 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
| 2808 | |
| 2809 | switch (sdata->vif.type) { |
Johannes Berg | 3ffd884 | 2015-04-14 10:28:37 +0200 | [diff] [blame] | 2810 | case NL80211_IFTYPE_ADHOC: |
| 2811 | /* DA SA BSSID */ |
| 2812 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); |
| 2813 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); |
| 2814 | memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN); |
| 2815 | build.hdr_len = 24; |
| 2816 | break; |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2817 | case NL80211_IFTYPE_STATION: |
| 2818 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { |
| 2819 | /* DA SA BSSID */ |
| 2820 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); |
| 2821 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); |
| 2822 | memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN); |
| 2823 | build.hdr_len = 24; |
| 2824 | break; |
| 2825 | } |
| 2826 | |
| 2827 | if (sdata->u.mgd.use_4addr) { |
| 2828 | /* non-regular ethertype cannot use the fastpath */ |
| 2829 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | |
| 2830 | IEEE80211_FCTL_TODS); |
| 2831 | /* RA TA DA SA */ |
| 2832 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); |
| 2833 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); |
| 2834 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); |
| 2835 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); |
| 2836 | build.hdr_len = 30; |
| 2837 | break; |
| 2838 | } |
| 2839 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
| 2840 | /* BSSID SA DA */ |
| 2841 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); |
| 2842 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); |
| 2843 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); |
| 2844 | build.hdr_len = 24; |
| 2845 | break; |
| 2846 | case NL80211_IFTYPE_AP_VLAN: |
| 2847 | if (sdata->wdev.use_4addr) { |
| 2848 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | |
| 2849 | IEEE80211_FCTL_TODS); |
| 2850 | /* RA TA DA SA */ |
| 2851 | memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN); |
| 2852 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); |
| 2853 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); |
| 2854 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); |
| 2855 | build.hdr_len = 30; |
| 2856 | break; |
| 2857 | } |
| 2858 | /* fall through */ |
| 2859 | case NL80211_IFTYPE_AP: |
| 2860 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
| 2861 | /* DA BSSID SA */ |
| 2862 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); |
| 2863 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); |
| 2864 | build.sa_offs = offsetof(struct ieee80211_hdr, addr3); |
| 2865 | build.hdr_len = 24; |
| 2866 | break; |
| 2867 | default: |
| 2868 | /* not handled on fast-xmit */ |
| 2869 | goto out; |
| 2870 | } |
| 2871 | |
| 2872 | if (sta->sta.wme) { |
| 2873 | build.hdr_len += 2; |
| 2874 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
| 2875 | } |
| 2876 | |
| 2877 | /* We store the key here so there's no point in using rcu_dereference() |
| 2878 | * but that's fine because the code that changes the pointers will call |
| 2879 | * this function after doing so. For a single CPU that would be enough, |
| 2880 | * for multiple see the comment above. |
| 2881 | */ |
| 2882 | build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]); |
| 2883 | if (!build.key) |
| 2884 | build.key = rcu_access_pointer(sdata->default_unicast_key); |
| 2885 | if (build.key) { |
Johannes Berg | e495c24 | 2015-04-10 14:03:17 +0200 | [diff] [blame] | 2886 | bool gen_iv, iv_spc, mmic; |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2887 | |
| 2888 | gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV; |
| 2889 | iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE; |
Johannes Berg | e495c24 | 2015-04-10 14:03:17 +0200 | [diff] [blame] | 2890 | mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC; |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2891 | |
| 2892 | /* don't handle software crypto */ |
| 2893 | if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
| 2894 | goto out; |
| 2895 | |
| 2896 | switch (build.key->conf.cipher) { |
| 2897 | case WLAN_CIPHER_SUITE_CCMP: |
| 2898 | case WLAN_CIPHER_SUITE_CCMP_256: |
| 2899 | /* add fixed key ID */ |
| 2900 | if (gen_iv) { |
| 2901 | (build.hdr + build.hdr_len)[3] = |
| 2902 | 0x20 | (build.key->conf.keyidx << 6); |
| 2903 | build.pn_offs = build.hdr_len; |
| 2904 | } |
| 2905 | if (gen_iv || iv_spc) |
| 2906 | build.hdr_len += IEEE80211_CCMP_HDR_LEN; |
| 2907 | break; |
| 2908 | case WLAN_CIPHER_SUITE_GCMP: |
| 2909 | case WLAN_CIPHER_SUITE_GCMP_256: |
| 2910 | /* add fixed key ID */ |
| 2911 | if (gen_iv) { |
| 2912 | (build.hdr + build.hdr_len)[3] = |
| 2913 | 0x20 | (build.key->conf.keyidx << 6); |
| 2914 | build.pn_offs = build.hdr_len; |
| 2915 | } |
| 2916 | if (gen_iv || iv_spc) |
| 2917 | build.hdr_len += IEEE80211_GCMP_HDR_LEN; |
| 2918 | break; |
Johannes Berg | e495c24 | 2015-04-10 14:03:17 +0200 | [diff] [blame] | 2919 | case WLAN_CIPHER_SUITE_TKIP: |
| 2920 | /* cannot handle MMIC or IV generation in xmit-fast */ |
| 2921 | if (mmic || gen_iv) |
| 2922 | goto out; |
| 2923 | if (iv_spc) |
| 2924 | build.hdr_len += IEEE80211_TKIP_IV_LEN; |
| 2925 | break; |
| 2926 | case WLAN_CIPHER_SUITE_WEP40: |
| 2927 | case WLAN_CIPHER_SUITE_WEP104: |
| 2928 | /* cannot handle IV generation in fast-xmit */ |
| 2929 | if (gen_iv) |
| 2930 | goto out; |
| 2931 | if (iv_spc) |
| 2932 | build.hdr_len += IEEE80211_WEP_IV_LEN; |
| 2933 | break; |
| 2934 | case WLAN_CIPHER_SUITE_AES_CMAC: |
| 2935 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
| 2936 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
| 2937 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: |
| 2938 | WARN(1, |
| 2939 | "management cipher suite 0x%x enabled for data\n", |
| 2940 | build.key->conf.cipher); |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2941 | goto out; |
Johannes Berg | e495c24 | 2015-04-10 14:03:17 +0200 | [diff] [blame] | 2942 | default: |
| 2943 | /* we don't know how to generate IVs for this at all */ |
| 2944 | if (WARN_ON(gen_iv)) |
| 2945 | goto out; |
| 2946 | /* pure hardware keys are OK, of course */ |
| 2947 | if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME)) |
| 2948 | break; |
| 2949 | /* cipher scheme might require space allocation */ |
| 2950 | if (iv_spc && |
| 2951 | build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV) |
| 2952 | goto out; |
| 2953 | if (iv_spc) |
| 2954 | build.hdr_len += build.key->conf.iv_len; |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 2955 | } |
| 2956 | |
| 2957 | fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| 2958 | } |
| 2959 | |
| 2960 | hdr->frame_control = fc; |
| 2961 | |
| 2962 | memcpy(build.hdr + build.hdr_len, |
| 2963 | rfc1042_header, sizeof(rfc1042_header)); |
| 2964 | build.hdr_len += sizeof(rfc1042_header); |
| 2965 | |
| 2966 | fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC); |
| 2967 | /* if the kmemdup fails, continue w/o fast_tx */ |
| 2968 | if (!fast_tx) |
| 2969 | goto out; |
| 2970 | |
| 2971 | out: |
| 2972 | /* we might have raced against another call to this function */ |
| 2973 | old = rcu_dereference_protected(sta->fast_tx, |
| 2974 | lockdep_is_held(&sta->lock)); |
| 2975 | rcu_assign_pointer(sta->fast_tx, fast_tx); |
| 2976 | if (old) |
| 2977 | kfree_rcu(old, rcu_head); |
| 2978 | spin_unlock_bh(&sta->lock); |
| 2979 | } |
| 2980 | |
| 2981 | void ieee80211_check_fast_xmit_all(struct ieee80211_local *local) |
| 2982 | { |
| 2983 | struct sta_info *sta; |
| 2984 | |
| 2985 | rcu_read_lock(); |
| 2986 | list_for_each_entry_rcu(sta, &local->sta_list, list) |
| 2987 | ieee80211_check_fast_xmit(sta); |
| 2988 | rcu_read_unlock(); |
| 2989 | } |
| 2990 | |
| 2991 | void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata) |
| 2992 | { |
| 2993 | struct ieee80211_local *local = sdata->local; |
| 2994 | struct sta_info *sta; |
| 2995 | |
| 2996 | rcu_read_lock(); |
| 2997 | |
| 2998 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 2999 | if (sdata != sta->sdata && |
| 3000 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) |
| 3001 | continue; |
| 3002 | ieee80211_check_fast_xmit(sta); |
| 3003 | } |
| 3004 | |
| 3005 | rcu_read_unlock(); |
| 3006 | } |
| 3007 | |
| 3008 | void ieee80211_clear_fast_xmit(struct sta_info *sta) |
| 3009 | { |
| 3010 | struct ieee80211_fast_tx *fast_tx; |
| 3011 | |
| 3012 | spin_lock_bh(&sta->lock); |
| 3013 | fast_tx = rcu_dereference_protected(sta->fast_tx, |
| 3014 | lockdep_is_held(&sta->lock)); |
| 3015 | RCU_INIT_POINTER(sta->fast_tx, NULL); |
| 3016 | spin_unlock_bh(&sta->lock); |
| 3017 | |
| 3018 | if (fast_tx) |
| 3019 | kfree_rcu(fast_tx, rcu_head); |
| 3020 | } |
| 3021 | |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3022 | static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local, |
| 3023 | struct sk_buff *skb, int headroom, |
| 3024 | int *subframe_len) |
| 3025 | { |
| 3026 | int amsdu_len = *subframe_len + sizeof(struct ethhdr); |
| 3027 | int padding = (4 - amsdu_len) & 3; |
| 3028 | |
| 3029 | if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) { |
| 3030 | I802_DEBUG_INC(local->tx_expand_skb_head); |
| 3031 | |
| 3032 | if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) { |
| 3033 | wiphy_debug(local->hw.wiphy, |
| 3034 | "failed to reallocate TX buffer\n"); |
| 3035 | return false; |
| 3036 | } |
| 3037 | } |
| 3038 | |
| 3039 | if (padding) { |
| 3040 | *subframe_len += padding; |
| 3041 | memset(skb_put(skb, padding), 0, padding); |
| 3042 | } |
| 3043 | |
| 3044 | return true; |
| 3045 | } |
| 3046 | |
| 3047 | static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata, |
| 3048 | struct ieee80211_fast_tx *fast_tx, |
| 3049 | struct sk_buff *skb) |
| 3050 | { |
| 3051 | struct ieee80211_local *local = sdata->local; |
| 3052 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 3053 | struct ieee80211_hdr *hdr; |
| 3054 | struct ethhdr amsdu_hdr; |
| 3055 | int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header); |
| 3056 | int subframe_len = skb->len - hdr_len; |
| 3057 | void *data; |
| 3058 | u8 *qc; |
| 3059 | |
| 3060 | if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) |
| 3061 | return false; |
| 3062 | |
| 3063 | if (info->control.flags & IEEE80211_TX_CTRL_AMSDU) |
| 3064 | return true; |
| 3065 | |
| 3066 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(amsdu_hdr), |
| 3067 | &subframe_len)) |
| 3068 | return false; |
| 3069 | |
| 3070 | amsdu_hdr.h_proto = cpu_to_be16(subframe_len); |
| 3071 | memcpy(amsdu_hdr.h_source, skb->data + fast_tx->sa_offs, ETH_ALEN); |
| 3072 | memcpy(amsdu_hdr.h_dest, skb->data + fast_tx->da_offs, ETH_ALEN); |
| 3073 | |
| 3074 | data = skb_push(skb, sizeof(amsdu_hdr)); |
| 3075 | memmove(data, data + sizeof(amsdu_hdr), hdr_len); |
| 3076 | memcpy(data + hdr_len, &amsdu_hdr, sizeof(amsdu_hdr)); |
| 3077 | |
| 3078 | hdr = data; |
| 3079 | qc = ieee80211_get_qos_ctl(hdr); |
| 3080 | *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; |
| 3081 | |
| 3082 | info->control.flags |= IEEE80211_TX_CTRL_AMSDU; |
| 3083 | |
| 3084 | return true; |
| 3085 | } |
| 3086 | |
| 3087 | static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata, |
| 3088 | struct sta_info *sta, |
| 3089 | struct ieee80211_fast_tx *fast_tx, |
| 3090 | struct sk_buff *skb) |
| 3091 | { |
| 3092 | struct ieee80211_local *local = sdata->local; |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 3093 | struct fq *fq = &local->fq; |
| 3094 | struct fq_tin *tin; |
| 3095 | struct fq_flow *flow; |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3096 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
| 3097 | struct ieee80211_txq *txq = sta->sta.txq[tid]; |
| 3098 | struct txq_info *txqi; |
| 3099 | struct sk_buff **frag_tail, *head; |
| 3100 | int subframe_len = skb->len - ETH_ALEN; |
| 3101 | u8 max_subframes = sta->sta.max_amsdu_subframes; |
| 3102 | int max_frags = local->hw.max_tx_fragments; |
| 3103 | int max_amsdu_len = sta->sta.max_amsdu_len; |
| 3104 | __be16 len; |
| 3105 | void *data; |
| 3106 | bool ret = false; |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 3107 | unsigned int orig_len; |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3108 | int n = 1, nfrags; |
| 3109 | |
| 3110 | if (!ieee80211_hw_check(&local->hw, TX_AMSDU)) |
| 3111 | return false; |
| 3112 | |
| 3113 | if (!txq) |
| 3114 | return false; |
| 3115 | |
| 3116 | txqi = to_txq_info(txq); |
| 3117 | if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags)) |
| 3118 | return false; |
| 3119 | |
| 3120 | if (sta->sta.max_rc_amsdu_len) |
| 3121 | max_amsdu_len = min_t(int, max_amsdu_len, |
| 3122 | sta->sta.max_rc_amsdu_len); |
| 3123 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 3124 | spin_lock_bh(&fq->lock); |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3125 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 3126 | /* TODO: Ideally aggregation should be done on dequeue to remain |
| 3127 | * responsive to environment changes. |
| 3128 | */ |
| 3129 | |
| 3130 | tin = &txqi->tin; |
| 3131 | flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func); |
| 3132 | head = skb_peek_tail(&flow->queue); |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3133 | if (!head) |
| 3134 | goto out; |
| 3135 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 3136 | orig_len = head->len; |
| 3137 | |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3138 | if (skb->len + head->len > max_amsdu_len) |
| 3139 | goto out; |
| 3140 | |
| 3141 | if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head)) |
| 3142 | goto out; |
| 3143 | |
| 3144 | nfrags = 1 + skb_shinfo(skb)->nr_frags; |
| 3145 | nfrags += 1 + skb_shinfo(head)->nr_frags; |
| 3146 | frag_tail = &skb_shinfo(head)->frag_list; |
| 3147 | while (*frag_tail) { |
| 3148 | nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags; |
| 3149 | frag_tail = &(*frag_tail)->next; |
| 3150 | n++; |
| 3151 | } |
| 3152 | |
| 3153 | if (max_subframes && n > max_subframes) |
| 3154 | goto out; |
| 3155 | |
| 3156 | if (max_frags && nfrags > max_frags) |
| 3157 | goto out; |
| 3158 | |
| 3159 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2, |
| 3160 | &subframe_len)) |
| 3161 | goto out; |
| 3162 | |
| 3163 | ret = true; |
| 3164 | data = skb_push(skb, ETH_ALEN + 2); |
| 3165 | memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN); |
| 3166 | |
| 3167 | data += 2 * ETH_ALEN; |
| 3168 | len = cpu_to_be16(subframe_len); |
| 3169 | memcpy(data, &len, 2); |
| 3170 | memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header)); |
| 3171 | |
| 3172 | head->len += skb->len; |
| 3173 | head->data_len += skb->len; |
| 3174 | *frag_tail = skb; |
| 3175 | |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 3176 | flow->backlog += head->len - orig_len; |
| 3177 | tin->backlog_bytes += head->len - orig_len; |
| 3178 | |
| 3179 | fq_recalc_backlog(fq, tin, flow); |
| 3180 | |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3181 | out: |
Michal Kazior | fa962b9 | 2016-05-19 10:37:49 +0200 | [diff] [blame] | 3182 | spin_unlock_bh(&fq->lock); |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3183 | |
| 3184 | return ret; |
| 3185 | } |
| 3186 | |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3187 | static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, |
| 3188 | struct net_device *dev, struct sta_info *sta, |
| 3189 | struct ieee80211_fast_tx *fast_tx, |
| 3190 | struct sk_buff *skb) |
| 3191 | { |
| 3192 | struct ieee80211_local *local = sdata->local; |
| 3193 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
| 3194 | int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2); |
| 3195 | int hw_headroom = sdata->local->hw.extra_tx_headroom; |
| 3196 | struct ethhdr eth; |
| 3197 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 3198 | struct ieee80211_hdr *hdr = (void *)fast_tx->hdr; |
| 3199 | struct ieee80211_tx_data tx; |
| 3200 | ieee80211_tx_result r; |
| 3201 | struct tid_ampdu_tx *tid_tx = NULL; |
| 3202 | u8 tid = IEEE80211_NUM_TIDS; |
| 3203 | |
| 3204 | /* control port protocol needs a lot of special handling */ |
| 3205 | if (cpu_to_be16(ethertype) == sdata->control_port_protocol) |
| 3206 | return false; |
| 3207 | |
| 3208 | /* only RFC 1042 SNAP */ |
| 3209 | if (ethertype < ETH_P_802_3_MIN) |
| 3210 | return false; |
| 3211 | |
| 3212 | /* don't handle TX status request here either */ |
| 3213 | if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) |
| 3214 | return false; |
| 3215 | |
| 3216 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { |
| 3217 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
| 3218 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
Johannes Berg | 472be00 | 2015-06-09 16:45:08 +0200 | [diff] [blame] | 3219 | if (tid_tx) { |
| 3220 | if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) |
| 3221 | return false; |
| 3222 | if (tid_tx->timeout) |
| 3223 | tid_tx->last_tx = jiffies; |
| 3224 | } |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3225 | } |
| 3226 | |
| 3227 | /* after this point (skb is modified) we cannot return false */ |
| 3228 | |
| 3229 | if (skb_shared(skb)) { |
| 3230 | struct sk_buff *tmp_skb = skb; |
| 3231 | |
| 3232 | skb = skb_clone(skb, GFP_ATOMIC); |
| 3233 | kfree_skb(tmp_skb); |
| 3234 | |
| 3235 | if (!skb) |
| 3236 | return true; |
| 3237 | } |
| 3238 | |
Johannes Berg | 5a49051 | 2015-04-22 17:10:38 +0200 | [diff] [blame] | 3239 | ieee80211_tx_stats(dev, skb->len + extra_head); |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3240 | |
Felix Fietkau | 6e0456b | 2016-03-03 22:59:00 +0100 | [diff] [blame] | 3241 | if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) && |
| 3242 | ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb)) |
| 3243 | return true; |
| 3244 | |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3245 | /* will not be crypto-handled beyond what we do here, so use false |
| 3246 | * as the may-encrypt argument for the resize to not account for |
| 3247 | * more room than we already have in 'extra_head' |
| 3248 | */ |
| 3249 | if (unlikely(ieee80211_skb_resize(sdata, skb, |
| 3250 | max_t(int, extra_head + hw_headroom - |
| 3251 | skb_headroom(skb), 0), |
| 3252 | false))) { |
| 3253 | kfree_skb(skb); |
| 3254 | return true; |
| 3255 | } |
| 3256 | |
| 3257 | memcpy(ð, skb->data, ETH_HLEN - 2); |
| 3258 | hdr = (void *)skb_push(skb, extra_head); |
| 3259 | memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len); |
| 3260 | memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN); |
| 3261 | memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN); |
| 3262 | |
| 3263 | memset(info, 0, sizeof(*info)); |
| 3264 | info->band = fast_tx->band; |
| 3265 | info->control.vif = &sdata->vif; |
| 3266 | info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT | |
| 3267 | IEEE80211_TX_CTL_DONTFRAG | |
| 3268 | (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0); |
| 3269 | |
| 3270 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { |
| 3271 | *ieee80211_get_qos_ctl(hdr) = tid; |
Felix Fietkau | df6ef5d | 2016-09-04 18:00:59 +0200 | [diff] [blame] | 3272 | if (!ieee80211_get_txq(local, &sdata->vif, &sta->sta, skb)) |
Felix Fietkau | 50f36ae | 2015-09-24 14:59:48 +0200 | [diff] [blame] | 3273 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid); |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3274 | } else { |
| 3275 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
| 3276 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number); |
| 3277 | sdata->sequence_number += 0x10; |
| 3278 | } |
| 3279 | |
Johannes Berg | ccc6bb9 | 2015-06-23 11:50:52 +0200 | [diff] [blame] | 3280 | if (skb_shinfo(skb)->gso_size) |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 3281 | sta->tx_stats.msdu[tid] += |
Johannes Berg | ccc6bb9 | 2015-06-23 11:50:52 +0200 | [diff] [blame] | 3282 | DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size); |
| 3283 | else |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 3284 | sta->tx_stats.msdu[tid]++; |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3285 | |
| 3286 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; |
| 3287 | |
| 3288 | __skb_queue_head_init(&tx.skbs); |
| 3289 | |
| 3290 | tx.flags = IEEE80211_TX_UNICAST; |
| 3291 | tx.local = local; |
| 3292 | tx.sdata = sdata; |
| 3293 | tx.sta = sta; |
| 3294 | tx.key = fast_tx->key; |
| 3295 | |
| 3296 | if (fast_tx->key) |
| 3297 | info->control.hw_key = &fast_tx->key->conf; |
| 3298 | |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 3299 | if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) { |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3300 | tx.skb = skb; |
| 3301 | r = ieee80211_tx_h_rate_ctrl(&tx); |
| 3302 | skb = tx.skb; |
| 3303 | tx.skb = NULL; |
| 3304 | |
| 3305 | if (r != TX_CONTINUE) { |
| 3306 | if (r != TX_QUEUED) |
| 3307 | kfree_skb(skb); |
| 3308 | return true; |
| 3309 | } |
| 3310 | } |
| 3311 | |
| 3312 | /* statistics normally done by ieee80211_tx_h_stats (but that |
| 3313 | * has to consider fragmentation, so is more complex) |
| 3314 | */ |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 3315 | sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len; |
| 3316 | sta->tx_stats.packets[skb_get_queue_mapping(skb)]++; |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3317 | |
| 3318 | if (fast_tx->pn_offs) { |
| 3319 | u64 pn; |
| 3320 | u8 *crypto_hdr = skb->data + fast_tx->pn_offs; |
| 3321 | |
| 3322 | switch (fast_tx->key->conf.cipher) { |
| 3323 | case WLAN_CIPHER_SUITE_CCMP: |
| 3324 | case WLAN_CIPHER_SUITE_CCMP_256: |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3325 | case WLAN_CIPHER_SUITE_GCMP: |
| 3326 | case WLAN_CIPHER_SUITE_GCMP_256: |
Johannes Berg | db388a5 | 2015-06-01 15:36:51 +0200 | [diff] [blame] | 3327 | pn = atomic64_inc_return(&fast_tx->key->conf.tx_pn); |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3328 | crypto_hdr[0] = pn; |
| 3329 | crypto_hdr[1] = pn >> 8; |
| 3330 | crypto_hdr[4] = pn >> 16; |
| 3331 | crypto_hdr[5] = pn >> 24; |
| 3332 | crypto_hdr[6] = pn >> 32; |
| 3333 | crypto_hdr[7] = pn >> 40; |
| 3334 | break; |
| 3335 | } |
| 3336 | } |
| 3337 | |
| 3338 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 3339 | sdata = container_of(sdata->bss, |
| 3340 | struct ieee80211_sub_if_data, u.ap); |
| 3341 | |
| 3342 | __skb_queue_tail(&tx.skbs, skb); |
| 3343 | ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false); |
| 3344 | return true; |
| 3345 | } |
| 3346 | |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 3347 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, |
| 3348 | struct net_device *dev, |
| 3349 | u32 info_flags) |
| 3350 | { |
| 3351 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 3352 | struct sta_info *sta; |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3353 | struct sk_buff *next; |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 3354 | |
| 3355 | if (unlikely(skb->len < ETH_HLEN)) { |
| 3356 | kfree_skb(skb); |
| 3357 | return; |
| 3358 | } |
| 3359 | |
| 3360 | rcu_read_lock(); |
| 3361 | |
Johannes Berg | 2d981fd | 2015-04-10 14:10:10 +0200 | [diff] [blame] | 3362 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) |
| 3363 | goto out_free; |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 3364 | |
Johannes Berg | 17c18bf | 2015-03-21 15:25:43 +0100 | [diff] [blame] | 3365 | if (!IS_ERR_OR_NULL(sta)) { |
| 3366 | struct ieee80211_fast_tx *fast_tx; |
| 3367 | |
| 3368 | fast_tx = rcu_dereference(sta->fast_tx); |
| 3369 | |
| 3370 | if (fast_tx && |
| 3371 | ieee80211_xmit_fast(sdata, dev, sta, fast_tx, skb)) |
| 3372 | goto out; |
| 3373 | } |
| 3374 | |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3375 | if (skb_is_gso(skb)) { |
| 3376 | struct sk_buff *segs; |
Johannes Berg | 680a0da | 2015-04-13 16:58:25 +0200 | [diff] [blame] | 3377 | |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3378 | segs = skb_gso_segment(skb, 0); |
| 3379 | if (IS_ERR(segs)) { |
Johannes Berg | 2d981fd | 2015-04-10 14:10:10 +0200 | [diff] [blame] | 3380 | goto out_free; |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3381 | } else if (segs) { |
| 3382 | consume_skb(skb); |
| 3383 | skb = segs; |
| 3384 | } |
| 3385 | } else { |
| 3386 | /* we cannot process non-linear frames on this path */ |
| 3387 | if (skb_linearize(skb)) { |
| 3388 | kfree_skb(skb); |
| 3389 | goto out; |
| 3390 | } |
| 3391 | |
| 3392 | /* the frame could be fragmented, software-encrypted, and other |
| 3393 | * things so we cannot really handle checksum offload with it - |
| 3394 | * fix it up in software before we handle anything else. |
| 3395 | */ |
| 3396 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
Johannes Berg | f603f1f | 2015-05-05 15:25:33 +0200 | [diff] [blame] | 3397 | skb_set_transport_header(skb, |
| 3398 | skb_checksum_start_offset(skb)); |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3399 | if (skb_checksum_help(skb)) |
| 3400 | goto out_free; |
| 3401 | } |
Johannes Berg | 2d981fd | 2015-04-10 14:10:10 +0200 | [diff] [blame] | 3402 | } |
| 3403 | |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3404 | next = skb; |
| 3405 | while (next) { |
| 3406 | skb = next; |
| 3407 | next = skb->next; |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 3408 | |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3409 | skb->prev = NULL; |
| 3410 | skb->next = NULL; |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 3411 | |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3412 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); |
| 3413 | if (IS_ERR(skb)) |
| 3414 | goto out; |
| 3415 | |
Johannes Berg | 5a49051 | 2015-04-22 17:10:38 +0200 | [diff] [blame] | 3416 | ieee80211_tx_stats(dev, skb->len); |
Johannes Berg | 80616c0 | 2015-04-14 14:50:41 +0200 | [diff] [blame] | 3417 | |
| 3418 | ieee80211_xmit(sdata, sta, skb); |
| 3419 | } |
Johannes Berg | 2d981fd | 2015-04-10 14:10:10 +0200 | [diff] [blame] | 3420 | goto out; |
| 3421 | out_free: |
| 3422 | kfree_skb(skb); |
Johannes Berg | 4c9451e | 2014-11-09 18:50:10 +0200 | [diff] [blame] | 3423 | out: |
| 3424 | rcu_read_unlock(); |
| 3425 | } |
| 3426 | |
| 3427 | /** |
| 3428 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs |
| 3429 | * @skb: packet to be sent |
| 3430 | * @dev: incoming interface |
| 3431 | * |
| 3432 | * On failure skb will be freed. |
| 3433 | */ |
Liad Kaufman | 24d342c | 2014-11-09 18:50:07 +0200 | [diff] [blame] | 3434 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
| 3435 | struct net_device *dev) |
| 3436 | { |
| 3437 | __ieee80211_subif_start_xmit(skb, dev, 0); |
| 3438 | return NETDEV_TX_OK; |
| 3439 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3440 | |
Johannes Berg | 7528ec5 | 2014-11-09 18:50:11 +0200 | [diff] [blame] | 3441 | struct sk_buff * |
| 3442 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, |
| 3443 | struct sk_buff *skb, u32 info_flags) |
| 3444 | { |
| 3445 | struct ieee80211_hdr *hdr; |
| 3446 | struct ieee80211_tx_data tx = { |
| 3447 | .local = sdata->local, |
| 3448 | .sdata = sdata, |
| 3449 | }; |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 3450 | struct sta_info *sta; |
Johannes Berg | 7528ec5 | 2014-11-09 18:50:11 +0200 | [diff] [blame] | 3451 | |
| 3452 | rcu_read_lock(); |
| 3453 | |
Johannes Berg | 97ffe75 | 2015-03-21 09:13:45 +0100 | [diff] [blame] | 3454 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
| 3455 | kfree_skb(skb); |
| 3456 | skb = ERR_PTR(-EINVAL); |
| 3457 | goto out; |
| 3458 | } |
| 3459 | |
| 3460 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); |
Johannes Berg | 7528ec5 | 2014-11-09 18:50:11 +0200 | [diff] [blame] | 3461 | if (IS_ERR(skb)) |
| 3462 | goto out; |
| 3463 | |
| 3464 | hdr = (void *)skb->data; |
| 3465 | tx.sta = sta_info_get(sdata, hdr->addr1); |
| 3466 | tx.skb = skb; |
| 3467 | |
| 3468 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { |
| 3469 | rcu_read_unlock(); |
| 3470 | kfree_skb(skb); |
| 3471 | return ERR_PTR(-EINVAL); |
| 3472 | } |
| 3473 | |
| 3474 | out: |
| 3475 | rcu_read_unlock(); |
| 3476 | return skb; |
| 3477 | } |
| 3478 | |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 3479 | /* |
| 3480 | * ieee80211_clear_tx_pending may not be called in a context where |
| 3481 | * it is possible that it packets could come in again. |
| 3482 | */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3483 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
| 3484 | { |
Felix Fietkau | 1f98ab7 | 2012-11-10 03:44:14 +0100 | [diff] [blame] | 3485 | struct sk_buff *skb; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 3486 | int i; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3487 | |
Felix Fietkau | 1f98ab7 | 2012-11-10 03:44:14 +0100 | [diff] [blame] | 3488 | for (i = 0; i < local->hw.queues; i++) { |
| 3489 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) |
| 3490 | ieee80211_free_txskb(&local->hw, skb); |
| 3491 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3492 | } |
| 3493 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 3494 | /* |
| 3495 | * Returns false if the frame couldn't be transmitted but was queued instead, |
| 3496 | * which in this case means re-queued -- take as an indication to stop sending |
| 3497 | * more pending frames. |
| 3498 | */ |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3499 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
| 3500 | struct sk_buff *skb) |
| 3501 | { |
| 3502 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 3503 | struct ieee80211_sub_if_data *sdata; |
| 3504 | struct sta_info *sta; |
| 3505 | struct ieee80211_hdr *hdr; |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 3506 | bool result; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 3507 | struct ieee80211_chanctx_conf *chanctx_conf; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3508 | |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 3509 | sdata = vif_to_sdata(info->control.vif); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3510 | |
| 3511 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 3512 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 3513 | if (unlikely(!chanctx_conf)) { |
| 3514 | dev_kfree_skb(skb); |
| 3515 | return true; |
| 3516 | } |
Johannes Berg | 73c4e19 | 2014-11-09 18:50:09 +0200 | [diff] [blame] | 3517 | info->band = chanctx_conf->def.chan->band; |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 3518 | result = ieee80211_tx(sdata, NULL, skb, true); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3519 | } else { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 3520 | struct sk_buff_head skbs; |
| 3521 | |
| 3522 | __skb_queue_head_init(&skbs); |
| 3523 | __skb_queue_tail(&skbs, skb); |
| 3524 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3525 | hdr = (struct ieee80211_hdr *)skb->data; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 3526 | sta = sta_info_get(sdata, hdr->addr1); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3527 | |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 3528 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3529 | } |
| 3530 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3531 | return result; |
| 3532 | } |
| 3533 | |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 3534 | /* |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3535 | * Transmit all pending packets. Called from tasklet. |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 3536 | */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3537 | void ieee80211_tx_pending(unsigned long data) |
| 3538 | { |
| 3539 | struct ieee80211_local *local = (struct ieee80211_local *)data; |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3540 | unsigned long flags; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 3541 | int i; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3542 | bool txok; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3543 | |
Johannes Berg | f0e7285 | 2009-03-23 17:28:36 +0100 | [diff] [blame] | 3544 | rcu_read_lock(); |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3545 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3546 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
Johannes Berg | 176be72 | 2009-03-12 23:49:28 +0100 | [diff] [blame] | 3547 | for (i = 0; i < local->hw.queues; i++) { |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3548 | /* |
| 3549 | * If queue is stopped by something other than due to pending |
| 3550 | * frames, or we have no pending frames, proceed to next queue. |
| 3551 | */ |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3552 | if (local->queue_stop_reasons[i] || |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3553 | skb_queue_empty(&local->pending[i])) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3554 | continue; |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 3555 | |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3556 | while (!skb_queue_empty(&local->pending[i])) { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3557 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 3558 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 3559 | |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 3560 | if (WARN_ON(!info->control.vif)) { |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 3561 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 3562 | continue; |
| 3563 | } |
| 3564 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3565 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
| 3566 | flags); |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3567 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3568 | txok = ieee80211_tx_pending_skb(local, skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3569 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
| 3570 | flags); |
| 3571 | if (!txok) |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3572 | break; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3573 | } |
Johannes Berg | 7236fe2 | 2010-03-22 13:42:43 -0700 | [diff] [blame] | 3574 | |
| 3575 | if (skb_queue_empty(&local->pending[i])) |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 3576 | ieee80211_propagate_queue_wake(local, i); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3577 | } |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3578 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 3579 | |
Johannes Berg | f0e7285 | 2009-03-23 17:28:36 +0100 | [diff] [blame] | 3580 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3581 | } |
| 3582 | |
| 3583 | /* functions for drivers to get certain frames */ |
| 3584 | |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 3585 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3586 | struct ps_data *ps, struct sk_buff *skb, |
| 3587 | bool is_template) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3588 | { |
| 3589 | u8 *pos, *tim; |
| 3590 | int aid0 = 0; |
| 3591 | int i, have_bits = 0, n1, n2; |
| 3592 | |
| 3593 | /* Generate bitmap for TIM only if there are any STAs in power save |
| 3594 | * mode. */ |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3595 | if (atomic_read(&ps->num_sta_ps) > 0) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3596 | /* in the hope that this is faster than |
| 3597 | * checking byte-for-byte */ |
Weilong Chen | f359d3f | 2013-12-18 15:44:16 +0800 | [diff] [blame] | 3598 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3599 | IEEE80211_MAX_AID+1); |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3600 | if (!is_template) { |
| 3601 | if (ps->dtim_count == 0) |
| 3602 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; |
| 3603 | else |
| 3604 | ps->dtim_count--; |
| 3605 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3606 | |
| 3607 | tim = pos = (u8 *) skb_put(skb, 6); |
| 3608 | *pos++ = WLAN_EID_TIM; |
| 3609 | *pos++ = 4; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3610 | *pos++ = ps->dtim_count; |
Johannes Berg | 8860020 | 2012-02-13 15:17:18 +0100 | [diff] [blame] | 3611 | *pos++ = sdata->vif.bss_conf.dtim_period; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3612 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3613 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3614 | aid0 = 1; |
| 3615 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3616 | ps->dtim_bc_mc = aid0 == 1; |
Christian Lamparter | 512119b | 2011-01-31 20:48:44 +0200 | [diff] [blame] | 3617 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3618 | if (have_bits) { |
| 3619 | /* Find largest even number N1 so that bits numbered 1 through |
| 3620 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits |
| 3621 | * (N2 + 1) x 8 through 2007 are 0. */ |
| 3622 | n1 = 0; |
| 3623 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3624 | if (ps->tim[i]) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3625 | n1 = i & 0xfe; |
| 3626 | break; |
| 3627 | } |
| 3628 | } |
| 3629 | n2 = n1; |
| 3630 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3631 | if (ps->tim[i]) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3632 | n2 = i; |
| 3633 | break; |
| 3634 | } |
| 3635 | } |
| 3636 | |
| 3637 | /* Bitmap control */ |
| 3638 | *pos++ = n1 | aid0; |
| 3639 | /* Part Virt Bitmap */ |
Eliad Peller | 5220da3 | 2011-11-24 16:50:00 +0200 | [diff] [blame] | 3640 | skb_put(skb, n2 - n1); |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3641 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3642 | |
| 3643 | tim[1] = n2 - n1 + 4; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3644 | } else { |
| 3645 | *pos++ = aid0; /* Bitmap control */ |
| 3646 | *pos++ = 0; /* Part Virt Bitmap */ |
| 3647 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3648 | } |
| 3649 | |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 3650 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3651 | struct ps_data *ps, struct sk_buff *skb, |
| 3652 | bool is_template) |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 3653 | { |
| 3654 | struct ieee80211_local *local = sdata->local; |
| 3655 | |
| 3656 | /* |
| 3657 | * Not very nice, but we want to allow the driver to call |
| 3658 | * ieee80211_beacon_get() as a response to the set_tim() |
| 3659 | * callback. That, however, is already invoked under the |
| 3660 | * sta_lock to guarantee consistent and race-free update |
| 3661 | * of the tim bitmap in mac80211 and the driver. |
| 3662 | */ |
| 3663 | if (local->tim_in_locked_section) { |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3664 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 3665 | } else { |
Johannes Berg | 1b91731 | 2013-02-22 12:55:01 +0100 | [diff] [blame] | 3666 | spin_lock_bh(&local->tim_lock); |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3667 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
Johannes Berg | 1b91731 | 2013-02-22 12:55:01 +0100 | [diff] [blame] | 3668 | spin_unlock_bh(&local->tim_lock); |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 3669 | } |
| 3670 | |
| 3671 | return 0; |
| 3672 | } |
| 3673 | |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3674 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
| 3675 | struct beacon_data *beacon) |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3676 | { |
| 3677 | struct probe_resp *resp; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 3678 | u8 *beacon_data; |
| 3679 | size_t beacon_data_len; |
Andrei Otcheretianski | 0d06d9b | 2014-05-09 14:11:47 +0300 | [diff] [blame] | 3680 | int i; |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3681 | u8 count = beacon->csa_current_counter; |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3682 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 3683 | switch (sdata->vif.type) { |
| 3684 | case NL80211_IFTYPE_AP: |
| 3685 | beacon_data = beacon->tail; |
| 3686 | beacon_data_len = beacon->tail_len; |
| 3687 | break; |
| 3688 | case NL80211_IFTYPE_ADHOC: |
| 3689 | beacon_data = beacon->head; |
| 3690 | beacon_data_len = beacon->head_len; |
| 3691 | break; |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 3692 | case NL80211_IFTYPE_MESH_POINT: |
| 3693 | beacon_data = beacon->head; |
| 3694 | beacon_data_len = beacon->head_len; |
| 3695 | break; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 3696 | default: |
| 3697 | return; |
| 3698 | } |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3699 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3700 | rcu_read_lock(); |
Andrei Otcheretianski | 0d06d9b | 2014-05-09 14:11:47 +0300 | [diff] [blame] | 3701 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3702 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
Andrei Otcheretianski | 0d06d9b | 2014-05-09 14:11:47 +0300 | [diff] [blame] | 3703 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3704 | if (beacon->csa_counter_offsets[i]) { |
| 3705 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= |
| 3706 | beacon_data_len)) { |
Andrei Otcheretianski | 0d06d9b | 2014-05-09 14:11:47 +0300 | [diff] [blame] | 3707 | rcu_read_unlock(); |
| 3708 | return; |
| 3709 | } |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3710 | |
| 3711 | beacon_data[beacon->csa_counter_offsets[i]] = count; |
Andrei Otcheretianski | 0d06d9b | 2014-05-09 14:11:47 +0300 | [diff] [blame] | 3712 | } |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3713 | |
| 3714 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) |
| 3715 | resp->data[resp->csa_counter_offsets[i]] = count; |
Andrei Otcheretianski | 0d06d9b | 2014-05-09 14:11:47 +0300 | [diff] [blame] | 3716 | } |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3717 | rcu_read_unlock(); |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3718 | } |
| 3719 | |
Wojciech Dubowik | e996ec2 | 2015-06-10 13:06:53 +0200 | [diff] [blame] | 3720 | static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon) |
| 3721 | { |
| 3722 | beacon->csa_current_counter--; |
| 3723 | |
| 3724 | /* the counter should never reach 0 */ |
| 3725 | WARN_ON_ONCE(!beacon->csa_current_counter); |
| 3726 | |
| 3727 | return beacon->csa_current_counter; |
| 3728 | } |
| 3729 | |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3730 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) |
| 3731 | { |
| 3732 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3733 | struct beacon_data *beacon = NULL; |
| 3734 | u8 count = 0; |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3735 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3736 | rcu_read_lock(); |
| 3737 | |
| 3738 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 3739 | beacon = rcu_dereference(sdata->u.ap.beacon); |
| 3740 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 3741 | beacon = rcu_dereference(sdata->u.ibss.presp); |
| 3742 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 3743 | beacon = rcu_dereference(sdata->u.mesh.beacon); |
| 3744 | |
| 3745 | if (!beacon) |
| 3746 | goto unlock; |
| 3747 | |
Wojciech Dubowik | e996ec2 | 2015-06-10 13:06:53 +0200 | [diff] [blame] | 3748 | count = __ieee80211_csa_update_counter(beacon); |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3749 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3750 | unlock: |
| 3751 | rcu_read_unlock(); |
| 3752 | return count; |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3753 | } |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3754 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3755 | |
| 3756 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) |
| 3757 | { |
| 3758 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 3759 | struct beacon_data *beacon = NULL; |
| 3760 | u8 *beacon_data; |
| 3761 | size_t beacon_data_len; |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3762 | int ret = false; |
| 3763 | |
| 3764 | if (!ieee80211_sdata_running(sdata)) |
| 3765 | return false; |
| 3766 | |
| 3767 | rcu_read_lock(); |
| 3768 | if (vif->type == NL80211_IFTYPE_AP) { |
| 3769 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
| 3770 | |
| 3771 | beacon = rcu_dereference(ap->beacon); |
| 3772 | if (WARN_ON(!beacon || !beacon->tail)) |
| 3773 | goto out; |
| 3774 | beacon_data = beacon->tail; |
| 3775 | beacon_data_len = beacon->tail_len; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 3776 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
| 3777 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 3778 | |
| 3779 | beacon = rcu_dereference(ifibss->presp); |
| 3780 | if (!beacon) |
| 3781 | goto out; |
| 3782 | |
| 3783 | beacon_data = beacon->head; |
| 3784 | beacon_data_len = beacon->head_len; |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 3785 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { |
| 3786 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
| 3787 | |
| 3788 | beacon = rcu_dereference(ifmsh->beacon); |
| 3789 | if (!beacon) |
| 3790 | goto out; |
| 3791 | |
| 3792 | beacon_data = beacon->head; |
| 3793 | beacon_data_len = beacon->head_len; |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3794 | } else { |
| 3795 | WARN_ON(1); |
| 3796 | goto out; |
| 3797 | } |
| 3798 | |
Michal Kazior | 10d78f2 | 2014-06-05 14:21:37 +0200 | [diff] [blame] | 3799 | if (!beacon->csa_counter_offsets[0]) |
| 3800 | goto out; |
| 3801 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3802 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3803 | goto out; |
| 3804 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3805 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3806 | ret = true; |
| 3807 | out: |
| 3808 | rcu_read_unlock(); |
| 3809 | |
| 3810 | return ret; |
| 3811 | } |
| 3812 | EXPORT_SYMBOL(ieee80211_csa_is_complete); |
| 3813 | |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3814 | static struct sk_buff * |
| 3815 | __ieee80211_beacon_get(struct ieee80211_hw *hw, |
| 3816 | struct ieee80211_vif *vif, |
| 3817 | struct ieee80211_mutable_offsets *offs, |
| 3818 | bool is_template) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3819 | { |
| 3820 | struct ieee80211_local *local = hw_to_local(hw); |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3821 | struct beacon_data *beacon = NULL; |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 3822 | struct sk_buff *skb = NULL; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 3823 | struct ieee80211_tx_info *info; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3824 | struct ieee80211_sub_if_data *sdata = NULL; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 3825 | enum nl80211_band band; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 3826 | struct ieee80211_tx_rate_control txrc; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 3827 | struct ieee80211_chanctx_conf *chanctx_conf; |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3828 | int csa_off_base = 0; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3829 | |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 3830 | rcu_read_lock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3831 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 3832 | sdata = vif_to_sdata(vif); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 3833 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3834 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 3835 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
Felix Fietkau | eb3e554 | 2011-01-24 19:28:49 +0100 | [diff] [blame] | 3836 | goto out; |
| 3837 | |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3838 | if (offs) |
| 3839 | memset(offs, 0, sizeof(*offs)); |
Johannes Berg | eddcbb9 | 2009-10-29 08:30:35 +0100 | [diff] [blame] | 3840 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3841 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3842 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 3843 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3844 | beacon = rcu_dereference(ap->beacon); |
Dan Carpenter | 3ad97fb | 2011-02-07 22:03:35 +0300 | [diff] [blame] | 3845 | if (beacon) { |
Michal Kazior | 10d78f2 | 2014-06-05 14:21:37 +0200 | [diff] [blame] | 3846 | if (beacon->csa_counter_offsets[0]) { |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3847 | if (!is_template) |
Wojciech Dubowik | e996ec2 | 2015-06-10 13:06:53 +0200 | [diff] [blame] | 3848 | __ieee80211_csa_update_counter(beacon); |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3849 | |
| 3850 | ieee80211_set_csa(sdata, beacon); |
| 3851 | } |
Simon Wunderlich | 73da7d5 | 2013-07-11 16:09:06 +0200 | [diff] [blame] | 3852 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 3853 | /* |
| 3854 | * headroom, head length, |
| 3855 | * tail length and maximum TIM length |
| 3856 | */ |
| 3857 | skb = dev_alloc_skb(local->tx_headroom + |
| 3858 | beacon->head_len + |
Felix Fietkau | 70dabeb | 2013-12-14 13:54:53 +0100 | [diff] [blame] | 3859 | beacon->tail_len + 256 + |
| 3860 | local->hw.extra_beacon_tailroom); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 3861 | if (!skb) |
| 3862 | goto out; |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 3863 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 3864 | skb_reserve(skb, local->tx_headroom); |
| 3865 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
| 3866 | beacon->head_len); |
| 3867 | |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3868 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
| 3869 | is_template); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 3870 | |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3871 | if (offs) { |
| 3872 | offs->tim_offset = beacon->head_len; |
| 3873 | offs->tim_length = skb->len - beacon->head_len; |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3874 | |
| 3875 | /* for AP the csa offsets are from tail */ |
| 3876 | csa_off_base = skb->len; |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3877 | } |
Johannes Berg | eddcbb9 | 2009-10-29 08:30:35 +0100 | [diff] [blame] | 3878 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 3879 | if (beacon->tail) |
| 3880 | memcpy(skb_put(skb, beacon->tail_len), |
| 3881 | beacon->tail, beacon->tail_len); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 3882 | } else |
| 3883 | goto out; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3884 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 3885 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 3886 | struct ieee80211_hdr *hdr; |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 3887 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3888 | beacon = rcu_dereference(ifibss->presp); |
| 3889 | if (!beacon) |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 3890 | goto out; |
| 3891 | |
Michal Kazior | 10d78f2 | 2014-06-05 14:21:37 +0200 | [diff] [blame] | 3892 | if (beacon->csa_counter_offsets[0]) { |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3893 | if (!is_template) |
Wojciech Dubowik | e996ec2 | 2015-06-10 13:06:53 +0200 | [diff] [blame] | 3894 | __ieee80211_csa_update_counter(beacon); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 3895 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3896 | ieee80211_set_csa(sdata, beacon); |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3897 | } |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 3898 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3899 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
Felix Fietkau | 70dabeb | 2013-12-14 13:54:53 +0100 | [diff] [blame] | 3900 | local->hw.extra_beacon_tailroom); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 3901 | if (!skb) |
| 3902 | goto out; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 3903 | skb_reserve(skb, local->tx_headroom); |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3904 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
| 3905 | beacon->head_len); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 3906 | |
| 3907 | hdr = (struct ieee80211_hdr *) skb->data; |
Harvey Harrison | e7827a7 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 3908 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 3909 | IEEE80211_STYPE_BEACON); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 3910 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 3911 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 3912 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3913 | beacon = rcu_dereference(ifmsh->beacon); |
| 3914 | if (!beacon) |
Johannes Berg | ac1bd84 | 2011-01-18 13:45:32 +0100 | [diff] [blame] | 3915 | goto out; |
Johannes Berg | ac1bd84 | 2011-01-18 13:45:32 +0100 | [diff] [blame] | 3916 | |
Michal Kazior | 10d78f2 | 2014-06-05 14:21:37 +0200 | [diff] [blame] | 3917 | if (beacon->csa_counter_offsets[0]) { |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3918 | if (!is_template) |
| 3919 | /* TODO: For mesh csa_counter is in TU, so |
| 3920 | * decrementing it by one isn't correct, but |
| 3921 | * for now we leave it consistent with overall |
| 3922 | * mac80211's behavior. |
| 3923 | */ |
Wojciech Dubowik | e996ec2 | 2015-06-10 13:06:53 +0200 | [diff] [blame] | 3924 | __ieee80211_csa_update_counter(beacon); |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3925 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3926 | ieee80211_set_csa(sdata, beacon); |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3927 | } |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 3928 | |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 3929 | if (ifmsh->sync_ops) |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3930 | ifmsh->sync_ops->adjust_tbtt(sdata, beacon); |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 3931 | |
Thomas Pedersen | 3b69a9c | 2011-10-26 14:47:25 -0700 | [diff] [blame] | 3932 | skb = dev_alloc_skb(local->tx_headroom + |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3933 | beacon->head_len + |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 3934 | 256 + /* TIM IE */ |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3935 | beacon->tail_len + |
Felix Fietkau | 70dabeb | 2013-12-14 13:54:53 +0100 | [diff] [blame] | 3936 | local->hw.extra_beacon_tailroom); |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 3937 | if (!skb) |
| 3938 | goto out; |
Thomas Pedersen | 2b5e196 | 2013-02-14 11:20:13 -0800 | [diff] [blame] | 3939 | skb_reserve(skb, local->tx_headroom); |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3940 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
| 3941 | beacon->head_len); |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3942 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
| 3943 | |
| 3944 | if (offs) { |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3945 | offs->tim_offset = beacon->head_len; |
| 3946 | offs->tim_length = skb->len - beacon->head_len; |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 3947 | } |
| 3948 | |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3949 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
| 3950 | beacon->tail_len); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 3951 | } else { |
| 3952 | WARN_ON(1); |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 3953 | goto out; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3954 | } |
| 3955 | |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3956 | /* CSA offsets */ |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3957 | if (offs && beacon) { |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3958 | int i; |
| 3959 | |
| 3960 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 3961 | u16 csa_off = beacon->csa_counter_offsets[i]; |
Andrei Otcheretianski | 1af586c | 2014-05-09 14:11:50 +0300 | [diff] [blame] | 3962 | |
| 3963 | if (!csa_off) |
| 3964 | continue; |
| 3965 | |
| 3966 | offs->csa_counter_offs[i] = csa_off_base + csa_off; |
| 3967 | } |
| 3968 | } |
| 3969 | |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 3970 | band = chanctx_conf->def.chan->band; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 3971 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 3972 | info = IEEE80211_SKB_CB(skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3973 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 3974 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 3975 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 3976 | info->band = band; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 3977 | |
| 3978 | memset(&txrc, 0, sizeof(txrc)); |
| 3979 | txrc.hw = hw; |
Johannes Berg | e31583c | 2012-07-26 14:07:46 +0200 | [diff] [blame] | 3980 | txrc.sband = local->hw.wiphy->bands[band]; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 3981 | txrc.bss_conf = &sdata->vif.bss_conf; |
| 3982 | txrc.skb = skb; |
| 3983 | txrc.reported_rate.idx = -1; |
Jouni Malinen | 37eb0b1 | 2010-01-06 13:09:08 +0200 | [diff] [blame] | 3984 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
Johannes Berg | e31583c | 2012-07-26 14:07:46 +0200 | [diff] [blame] | 3985 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
Jouni Malinen | 37eb0b1 | 2010-01-06 13:09:08 +0200 | [diff] [blame] | 3986 | txrc.max_rate_idx = -1; |
| 3987 | else |
| 3988 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; |
Felix Fietkau | 8f0729b | 2010-11-11 15:07:23 +0100 | [diff] [blame] | 3989 | txrc.bss = true; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 3990 | rate_control_get_rate(sdata, NULL, &txrc); |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 3991 | |
| 3992 | info->control.vif = vif; |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 3993 | |
John W. Linville | a472e71 | 2010-05-06 14:45:17 -0400 | [diff] [blame] | 3994 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
| 3995 | IEEE80211_TX_CTL_ASSIGN_SEQ | |
| 3996 | IEEE80211_TX_CTL_FIRST_FRAGMENT; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 3997 | out: |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 3998 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3999 | return skb; |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 4000 | |
| 4001 | } |
| 4002 | |
| 4003 | struct sk_buff * |
| 4004 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, |
| 4005 | struct ieee80211_vif *vif, |
| 4006 | struct ieee80211_mutable_offsets *offs) |
| 4007 | { |
| 4008 | return __ieee80211_beacon_get(hw, vif, offs, true); |
| 4009 | } |
| 4010 | EXPORT_SYMBOL(ieee80211_beacon_get_template); |
| 4011 | |
| 4012 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
| 4013 | struct ieee80211_vif *vif, |
| 4014 | u16 *tim_offset, u16 *tim_length) |
| 4015 | { |
| 4016 | struct ieee80211_mutable_offsets offs = {}; |
| 4017 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); |
Helmut Schaa | 35afa58 | 2015-09-09 09:46:32 +0200 | [diff] [blame] | 4018 | struct sk_buff *copy; |
| 4019 | struct ieee80211_supported_band *sband; |
| 4020 | int shift; |
| 4021 | |
| 4022 | if (!bcn) |
| 4023 | return bcn; |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 4024 | |
| 4025 | if (tim_offset) |
| 4026 | *tim_offset = offs.tim_offset; |
| 4027 | |
| 4028 | if (tim_length) |
| 4029 | *tim_length = offs.tim_length; |
| 4030 | |
Helmut Schaa | 35afa58 | 2015-09-09 09:46:32 +0200 | [diff] [blame] | 4031 | if (ieee80211_hw_check(hw, BEACON_TX_STATUS) || |
| 4032 | !hw_to_local(hw)->monitors) |
| 4033 | return bcn; |
| 4034 | |
| 4035 | /* send a copy to monitor interfaces */ |
| 4036 | copy = skb_copy(bcn, GFP_ATOMIC); |
| 4037 | if (!copy) |
| 4038 | return bcn; |
| 4039 | |
| 4040 | shift = ieee80211_vif_get_shift(vif); |
| 4041 | sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))]; |
| 4042 | ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false); |
| 4043 | |
Andrei Otcheretianski | 6ec8c33 | 2014-05-09 14:11:49 +0300 | [diff] [blame] | 4044 | return bcn; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4045 | } |
Johannes Berg | eddcbb9 | 2009-10-29 08:30:35 +0100 | [diff] [blame] | 4046 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4047 | |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 4048 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
| 4049 | struct ieee80211_vif *vif) |
| 4050 | { |
| 4051 | struct ieee80211_if_ap *ap = NULL; |
Eyal Shapira | aa7a008 | 2012-08-06 14:26:16 +0300 | [diff] [blame] | 4052 | struct sk_buff *skb = NULL; |
| 4053 | struct probe_resp *presp = NULL; |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 4054 | struct ieee80211_hdr *hdr; |
| 4055 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 4056 | |
| 4057 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
| 4058 | return NULL; |
| 4059 | |
| 4060 | rcu_read_lock(); |
| 4061 | |
| 4062 | ap = &sdata->u.ap; |
| 4063 | presp = rcu_dereference(ap->probe_resp); |
| 4064 | if (!presp) |
| 4065 | goto out; |
| 4066 | |
Eyal Shapira | aa7a008 | 2012-08-06 14:26:16 +0300 | [diff] [blame] | 4067 | skb = dev_alloc_skb(presp->len); |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 4068 | if (!skb) |
| 4069 | goto out; |
| 4070 | |
Eyal Shapira | aa7a008 | 2012-08-06 14:26:16 +0300 | [diff] [blame] | 4071 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
| 4072 | |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 4073 | hdr = (struct ieee80211_hdr *) skb->data; |
| 4074 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); |
| 4075 | |
| 4076 | out: |
| 4077 | rcu_read_unlock(); |
| 4078 | return skb; |
| 4079 | } |
| 4080 | EXPORT_SYMBOL(ieee80211_proberesp_get); |
| 4081 | |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 4082 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
| 4083 | struct ieee80211_vif *vif) |
| 4084 | { |
| 4085 | struct ieee80211_sub_if_data *sdata; |
| 4086 | struct ieee80211_if_managed *ifmgd; |
| 4087 | struct ieee80211_pspoll *pspoll; |
| 4088 | struct ieee80211_local *local; |
| 4089 | struct sk_buff *skb; |
| 4090 | |
| 4091 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) |
| 4092 | return NULL; |
| 4093 | |
| 4094 | sdata = vif_to_sdata(vif); |
| 4095 | ifmgd = &sdata->u.mgd; |
| 4096 | local = sdata->local; |
| 4097 | |
| 4098 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 4099 | if (!skb) |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 4100 | return NULL; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 4101 | |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 4102 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 4103 | |
| 4104 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); |
| 4105 | memset(pspoll, 0, sizeof(*pspoll)); |
| 4106 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
| 4107 | IEEE80211_STYPE_PSPOLL); |
| 4108 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
| 4109 | |
| 4110 | /* aid in PS-Poll has its two MSBs each set to 1 */ |
| 4111 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); |
| 4112 | |
| 4113 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
| 4114 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); |
| 4115 | |
| 4116 | return skb; |
| 4117 | } |
| 4118 | EXPORT_SYMBOL(ieee80211_pspoll_get); |
| 4119 | |
| 4120 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, |
| 4121 | struct ieee80211_vif *vif) |
| 4122 | { |
| 4123 | struct ieee80211_hdr_3addr *nullfunc; |
| 4124 | struct ieee80211_sub_if_data *sdata; |
| 4125 | struct ieee80211_if_managed *ifmgd; |
| 4126 | struct ieee80211_local *local; |
| 4127 | struct sk_buff *skb; |
| 4128 | |
| 4129 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) |
| 4130 | return NULL; |
| 4131 | |
| 4132 | sdata = vif_to_sdata(vif); |
| 4133 | ifmgd = &sdata->u.mgd; |
| 4134 | local = sdata->local; |
| 4135 | |
| 4136 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 4137 | if (!skb) |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 4138 | return NULL; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 4139 | |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 4140 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 4141 | |
| 4142 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, |
| 4143 | sizeof(*nullfunc)); |
| 4144 | memset(nullfunc, 0, sizeof(*nullfunc)); |
| 4145 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | |
| 4146 | IEEE80211_STYPE_NULLFUNC | |
| 4147 | IEEE80211_FCTL_TODS); |
| 4148 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); |
| 4149 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); |
| 4150 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); |
| 4151 | |
| 4152 | return skb; |
| 4153 | } |
| 4154 | EXPORT_SYMBOL(ieee80211_nullfunc_get); |
| 4155 | |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4156 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 4157 | const u8 *src_addr, |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4158 | const u8 *ssid, size_t ssid_len, |
Johannes Berg | b9a9ada | 2012-11-29 13:00:10 +0100 | [diff] [blame] | 4159 | size_t tailroom) |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4160 | { |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 4161 | struct ieee80211_local *local = hw_to_local(hw); |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4162 | struct ieee80211_hdr_3addr *hdr; |
| 4163 | struct sk_buff *skb; |
| 4164 | size_t ie_ssid_len; |
| 4165 | u8 *pos; |
| 4166 | |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4167 | ie_ssid_len = 2 + ssid_len; |
| 4168 | |
| 4169 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + |
Johannes Berg | b9a9ada | 2012-11-29 13:00:10 +0100 | [diff] [blame] | 4170 | ie_ssid_len + tailroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 4171 | if (!skb) |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4172 | return NULL; |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4173 | |
| 4174 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 4175 | |
| 4176 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); |
| 4177 | memset(hdr, 0, sizeof(*hdr)); |
| 4178 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 4179 | IEEE80211_STYPE_PROBE_REQ); |
Johannes Berg | e83e654 | 2012-07-13 16:23:07 +0200 | [diff] [blame] | 4180 | eth_broadcast_addr(hdr->addr1); |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 4181 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
Johannes Berg | e83e654 | 2012-07-13 16:23:07 +0200 | [diff] [blame] | 4182 | eth_broadcast_addr(hdr->addr3); |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4183 | |
| 4184 | pos = skb_put(skb, ie_ssid_len); |
| 4185 | *pos++ = WLAN_EID_SSID; |
| 4186 | *pos++ = ssid_len; |
Stanislaw Gruszka | 88c868c | 2012-03-29 16:30:41 +0200 | [diff] [blame] | 4187 | if (ssid_len) |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4188 | memcpy(pos, ssid, ssid_len); |
| 4189 | pos += ssid_len; |
| 4190 | |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 4191 | return skb; |
| 4192 | } |
| 4193 | EXPORT_SYMBOL(ieee80211_probereq_get); |
| 4194 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 4195 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4196 | const void *frame, size_t frame_len, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 4197 | const struct ieee80211_tx_info *frame_txctl, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4198 | struct ieee80211_rts *rts) |
| 4199 | { |
| 4200 | const struct ieee80211_hdr *hdr = frame; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4201 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 4202 | rts->frame_control = |
| 4203 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 4204 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
| 4205 | frame_txctl); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4206 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
| 4207 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); |
| 4208 | } |
| 4209 | EXPORT_SYMBOL(ieee80211_rts_get); |
| 4210 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 4211 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4212 | const void *frame, size_t frame_len, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 4213 | const struct ieee80211_tx_info *frame_txctl, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4214 | struct ieee80211_cts *cts) |
| 4215 | { |
| 4216 | const struct ieee80211_hdr *hdr = frame; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4217 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 4218 | cts->frame_control = |
| 4219 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 4220 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
| 4221 | frame_len, frame_txctl); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4222 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
| 4223 | } |
| 4224 | EXPORT_SYMBOL(ieee80211_ctstoself_get); |
| 4225 | |
| 4226 | struct sk_buff * |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 4227 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 4228 | struct ieee80211_vif *vif) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4229 | { |
| 4230 | struct ieee80211_local *local = hw_to_local(hw); |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 4231 | struct sk_buff *skb = NULL; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 4232 | struct ieee80211_tx_data tx; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4233 | struct ieee80211_sub_if_data *sdata; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 4234 | struct ps_data *ps; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 4235 | struct ieee80211_tx_info *info; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 4236 | struct ieee80211_chanctx_conf *chanctx_conf; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4237 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 4238 | sdata = vif_to_sdata(vif); |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 4239 | |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 4240 | rcu_read_lock(); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 4241 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 4242 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 4243 | if (!chanctx_conf) |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 4244 | goto out; |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 4245 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 4246 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 4247 | struct beacon_data *beacon = |
| 4248 | rcu_dereference(sdata->u.ap.beacon); |
| 4249 | |
| 4250 | if (!beacon || !beacon->head) |
| 4251 | goto out; |
| 4252 | |
| 4253 | ps = &sdata->u.ap.ps; |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 4254 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| 4255 | ps = &sdata->u.mesh.ps; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 4256 | } else { |
| 4257 | goto out; |
| 4258 | } |
| 4259 | |
| 4260 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 4261 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 4262 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4263 | while (1) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 4264 | skb = skb_dequeue(&ps->bc_buf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4265 | if (!skb) |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 4266 | goto out; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4267 | local->total_ps_buffered--; |
| 4268 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 4269 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4270 | struct ieee80211_hdr *hdr = |
| 4271 | (struct ieee80211_hdr *) skb->data; |
| 4272 | /* more buffered multicast/broadcast frames ==> set |
| 4273 | * MoreData flag in IEEE 802.11 header to inform PS |
| 4274 | * STAs */ |
| 4275 | hdr->frame_control |= |
| 4276 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| 4277 | } |
| 4278 | |
Michael Braun | 112c44b | 2014-03-06 15:08:43 +0100 | [diff] [blame] | 4279 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
Marco Porsch | 7cbf9d0 | 2013-03-01 16:01:18 +0100 | [diff] [blame] | 4280 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 4281 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4282 | break; |
Felix Fietkau | 6b07d9c | 2016-08-02 11:13:41 +0200 | [diff] [blame] | 4283 | ieee80211_free_txskb(hw, skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4284 | } |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 4285 | |
| 4286 | info = IEEE80211_SKB_CB(skb); |
| 4287 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 4288 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 4289 | info->band = chanctx_conf->def.chan->band; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4290 | |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 4291 | if (invoke_tx_handlers(&tx)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4292 | skb = NULL; |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 4293 | out: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 4294 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 4295 | |
| 4296 | return skb; |
| 4297 | } |
| 4298 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 4299 | |
Liad Kaufman | b6da911 | 2014-11-19 13:47:38 +0200 | [diff] [blame] | 4300 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
| 4301 | { |
| 4302 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 4303 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 4304 | struct ieee80211_local *local = sdata->local; |
| 4305 | int ret; |
| 4306 | u32 queues; |
| 4307 | |
| 4308 | lockdep_assert_held(&local->sta_mtx); |
| 4309 | |
| 4310 | /* only some cases are supported right now */ |
| 4311 | switch (sdata->vif.type) { |
| 4312 | case NL80211_IFTYPE_STATION: |
| 4313 | case NL80211_IFTYPE_AP: |
| 4314 | case NL80211_IFTYPE_AP_VLAN: |
| 4315 | break; |
| 4316 | default: |
| 4317 | WARN_ON(1); |
| 4318 | return -EINVAL; |
| 4319 | } |
| 4320 | |
| 4321 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) |
| 4322 | return -EINVAL; |
| 4323 | |
| 4324 | if (sta->reserved_tid == tid) { |
| 4325 | ret = 0; |
| 4326 | goto out; |
| 4327 | } |
| 4328 | |
| 4329 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { |
| 4330 | sdata_err(sdata, "TID reservation already active\n"); |
| 4331 | ret = -EALREADY; |
| 4332 | goto out; |
| 4333 | } |
| 4334 | |
| 4335 | ieee80211_stop_vif_queues(sdata->local, sdata, |
| 4336 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); |
| 4337 | |
| 4338 | synchronize_net(); |
| 4339 | |
| 4340 | /* Tear down BA sessions so we stop aggregating on this TID */ |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 4341 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) { |
Liad Kaufman | b6da911 | 2014-11-19 13:47:38 +0200 | [diff] [blame] | 4342 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
| 4343 | __ieee80211_stop_tx_ba_session(sta, tid, |
| 4344 | AGG_STOP_LOCAL_REQUEST); |
| 4345 | } |
| 4346 | |
| 4347 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); |
Emmanuel Grumbach | 3b24f4c | 2015-01-07 15:42:39 +0200 | [diff] [blame] | 4348 | __ieee80211_flush_queues(local, sdata, queues, false); |
Liad Kaufman | b6da911 | 2014-11-19 13:47:38 +0200 | [diff] [blame] | 4349 | |
| 4350 | sta->reserved_tid = tid; |
| 4351 | |
| 4352 | ieee80211_wake_vif_queues(local, sdata, |
| 4353 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); |
| 4354 | |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 4355 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) |
Liad Kaufman | b6da911 | 2014-11-19 13:47:38 +0200 | [diff] [blame] | 4356 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
| 4357 | |
| 4358 | ret = 0; |
| 4359 | out: |
| 4360 | return ret; |
| 4361 | } |
| 4362 | EXPORT_SYMBOL(ieee80211_reserve_tid); |
| 4363 | |
| 4364 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
| 4365 | { |
| 4366 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 4367 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 4368 | |
| 4369 | lockdep_assert_held(&sdata->local->sta_mtx); |
| 4370 | |
| 4371 | /* only some cases are supported right now */ |
| 4372 | switch (sdata->vif.type) { |
| 4373 | case NL80211_IFTYPE_STATION: |
| 4374 | case NL80211_IFTYPE_AP: |
| 4375 | case NL80211_IFTYPE_AP_VLAN: |
| 4376 | break; |
| 4377 | default: |
| 4378 | WARN_ON(1); |
| 4379 | return; |
| 4380 | } |
| 4381 | |
| 4382 | if (tid != sta->reserved_tid) { |
| 4383 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); |
| 4384 | return; |
| 4385 | } |
| 4386 | |
| 4387 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; |
| 4388 | } |
| 4389 | EXPORT_SYMBOL(ieee80211_unreserve_tid); |
| 4390 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 4391 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
| 4392 | struct sk_buff *skb, int tid, |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 4393 | enum nl80211_band band) |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 4394 | { |
Christian Lamparter | 353d09c | 2012-07-07 15:07:13 +0200 | [diff] [blame] | 4395 | int ac = ieee802_1d_to_ac[tid & 7]; |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 4396 | |
Zhang Shengju | d57a544 | 2016-03-03 01:16:56 +0000 | [diff] [blame] | 4397 | skb_reset_mac_header(skb); |
| 4398 | skb_reset_network_header(skb); |
| 4399 | skb_reset_transport_header(skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 4400 | |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 4401 | skb_set_queue_mapping(skb, ac); |
Helmut Schaa | cf6bb79 | 2011-12-15 10:18:34 +0100 | [diff] [blame] | 4402 | skb->priority = tid; |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 4403 | |
Johannes Berg | 89afe61 | 2013-02-13 15:39:57 +0100 | [diff] [blame] | 4404 | skb->dev = sdata->dev; |
| 4405 | |
Johannes Berg | 3d34deb | 2009-06-18 17:25:11 +0200 | [diff] [blame] | 4406 | /* |
| 4407 | * The other path calling ieee80211_xmit is from the tasklet, |
| 4408 | * and while we can handle concurrent transmissions locking |
| 4409 | * requirements are that we do not come into tx with bhs on. |
| 4410 | */ |
| 4411 | local_bh_disable(); |
Johannes Berg | 73c4e19 | 2014-11-09 18:50:09 +0200 | [diff] [blame] | 4412 | IEEE80211_SKB_CB(skb)->band = band; |
Johannes Berg | 7c10770 | 2015-03-20 14:18:27 +0100 | [diff] [blame] | 4413 | ieee80211_xmit(sdata, NULL, skb); |
Johannes Berg | 3d34deb | 2009-06-18 17:25:11 +0200 | [diff] [blame] | 4414 | local_bh_enable(); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 4415 | } |