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> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * |
| 12 | * Transmit and frame generation functions. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/skbuff.h> |
| 18 | #include <linux/etherdevice.h> |
| 19 | #include <linux/bitmap.h> |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 20 | #include <linux/rcupdate.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 21 | #include <linux/export.h> |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 22 | #include <net/net_namespace.h> |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 23 | #include <net/ieee80211_radiotap.h> |
| 24 | #include <net/cfg80211.h> |
| 25 | #include <net/mac80211.h> |
| 26 | #include <asm/unaligned.h> |
| 27 | |
| 28 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 29 | #include "driver-ops.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 30 | #include "led.h" |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 31 | #include "mesh.h" |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 32 | #include "wep.h" |
| 33 | #include "wpa.h" |
| 34 | #include "wme.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 35 | #include "rate.h" |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 36 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 37 | /* misc utils */ |
| 38 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 39 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
| 40 | struct sk_buff *skb, int group_addr, |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 41 | int next_frag_len) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 42 | { |
| 43 | int rate, mrate, erp, dur, i; |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 44 | struct ieee80211_rate *txrate; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 45 | struct ieee80211_local *local = tx->local; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 46 | struct ieee80211_supported_band *sband; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 47 | struct ieee80211_hdr *hdr; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 48 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 49 | |
| 50 | /* assume HW handles this */ |
| 51 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS) |
| 52 | return 0; |
| 53 | |
| 54 | /* uh huh? */ |
| 55 | if (WARN_ON_ONCE(info->control.rates[0].idx < 0)) |
| 56 | return 0; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 57 | |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 58 | sband = local->hw.wiphy->bands[info->band]; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 59 | txrate = &sband->bitrates[info->control.rates[0].idx]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 60 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 61 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 62 | |
| 63 | /* |
| 64 | * data and mgmt (except PS Poll): |
| 65 | * - during CFP: 32768 |
| 66 | * - during contention period: |
| 67 | * if addr1 is group address: 0 |
| 68 | * if more fragments = 0 and addr1 is individual address: time to |
| 69 | * transmit one ACK plus SIFS |
| 70 | * if more fragments = 1 and addr1 is individual address: time to |
| 71 | * transmit next fragment plus 2 x ACK plus 3 x SIFS |
| 72 | * |
| 73 | * IEEE 802.11, 9.6: |
| 74 | * - control response frame (CTS or ACK) shall be transmitted using the |
| 75 | * same rate as the immediately previous frame in the frame exchange |
| 76 | * sequence, if this rate belongs to the PHY mandatory rates, or else |
| 77 | * at the highest possible rate belonging to the PHY rates in the |
| 78 | * BSSBasicRateSet |
| 79 | */ |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 80 | hdr = (struct ieee80211_hdr *)skb->data; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 81 | if (ieee80211_is_ctl(hdr->frame_control)) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 82 | /* TODO: These control frames are not currently sent by |
Johannes Berg | ccd7b36 | 2008-09-11 00:01:56 +0200 | [diff] [blame] | 83 | * mac80211, but should they be implemented, this function |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 84 | * needs to be updated to support duration field calculation. |
| 85 | * |
| 86 | * RTS: time needed to transmit pending data/mgmt frame plus |
| 87 | * one CTS frame plus one ACK frame plus 3 x SIFS |
| 88 | * CTS: duration of immediately previous RTS minus time |
| 89 | * required to transmit CTS and its SIFS |
| 90 | * ACK: 0 if immediately previous directed data/mgmt had |
| 91 | * more=0, with more=1 duration in ACK frame is duration |
| 92 | * from previous frame minus time needed to transmit ACK |
| 93 | * and its SIFS |
| 94 | * PS Poll: BIT(15) | BIT(14) | aid |
| 95 | */ |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | /* data/mgmt */ |
| 100 | if (0 /* FIX: data/mgmt during CFP */) |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 101 | return cpu_to_le16(32768); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 102 | |
| 103 | if (group_addr) /* Group address as the destination - no ACK */ |
| 104 | return 0; |
| 105 | |
| 106 | /* Individual destination address: |
| 107 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) |
| 108 | * CTS and ACK frames shall be transmitted using the highest rate in |
| 109 | * basic rate set that is less than or equal to the rate of the |
| 110 | * immediately previous frame and that is using the same modulation |
| 111 | * (CCK or OFDM). If no basic rate set matches with these requirements, |
| 112 | * the highest mandatory rate of the PHY that is less than or equal to |
| 113 | * the rate of the previous frame is used. |
| 114 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps |
| 115 | */ |
| 116 | rate = -1; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 117 | /* use lowest available if everything fails */ |
| 118 | mrate = sband->bitrates[0].bitrate; |
| 119 | for (i = 0; i < sband->n_bitrates; i++) { |
| 120 | struct ieee80211_rate *r = &sband->bitrates[i]; |
| 121 | |
| 122 | if (r->bitrate > txrate->bitrate) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 123 | break; |
| 124 | |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 125 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 126 | rate = r->bitrate; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 127 | |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 128 | switch (sband->band) { |
| 129 | case IEEE80211_BAND_2GHZ: { |
| 130 | u32 flag; |
| 131 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
| 132 | flag = IEEE80211_RATE_MANDATORY_G; |
| 133 | else |
| 134 | flag = IEEE80211_RATE_MANDATORY_B; |
| 135 | if (r->flags & flag) |
| 136 | mrate = r->bitrate; |
| 137 | break; |
| 138 | } |
| 139 | case IEEE80211_BAND_5GHZ: |
| 140 | if (r->flags & IEEE80211_RATE_MANDATORY_A) |
| 141 | mrate = r->bitrate; |
| 142 | break; |
Vladimir Kondratiev | 3a0c52a | 2012-07-02 09:32:32 +0300 | [diff] [blame] | 143 | case IEEE80211_BAND_60GHZ: |
| 144 | /* TODO, for now fall through */ |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 145 | case IEEE80211_NUM_BANDS: |
| 146 | WARN_ON(1); |
| 147 | break; |
| 148 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 149 | } |
| 150 | if (rate == -1) { |
| 151 | /* No matching basic rate found; use highest suitable mandatory |
| 152 | * PHY rate */ |
| 153 | rate = mrate; |
| 154 | } |
| 155 | |
Simon Wunderlich | 6674f21 | 2011-11-21 21:34:30 +0100 | [diff] [blame] | 156 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
| 157 | if (ieee80211_is_data_qos(hdr->frame_control) && |
Claudio Pisa | c26a0e1 | 2012-05-28 13:06:25 +0100 | [diff] [blame] | 158 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
Simon Wunderlich | 6674f21 | 2011-11-21 21:34:30 +0100 | [diff] [blame] | 159 | dur = 0; |
| 160 | else |
| 161 | /* Time needed to transmit ACK |
| 162 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up |
| 163 | * to closest integer */ |
Michal Kazior | 4ee73f3 | 2012-04-11 08:47:56 +0200 | [diff] [blame] | 164 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 165 | tx->sdata->vif.bss_conf.use_short_preamble); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 166 | |
| 167 | if (next_frag_len) { |
| 168 | /* Frame is fragmented: duration increases with time needed to |
| 169 | * transmit next fragment plus ACK and 2 x SIFS. */ |
| 170 | dur *= 2; /* ACK + SIFS */ |
| 171 | /* next fragment */ |
Michal Kazior | 4ee73f3 | 2012-04-11 08:47:56 +0200 | [diff] [blame] | 172 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 173 | txrate->bitrate, erp, |
Johannes Berg | bda3933 | 2008-10-11 01:51:51 +0200 | [diff] [blame] | 174 | tx->sdata->vif.bss_conf.use_short_preamble); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 175 | } |
| 176 | |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 177 | return cpu_to_le16(dur); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 178 | } |
| 179 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 180 | /* tx handlers */ |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 181 | static ieee80211_tx_result debug_noinline |
| 182 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) |
| 183 | { |
| 184 | struct ieee80211_local *local = tx->local; |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 185 | struct ieee80211_if_managed *ifmgd; |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 186 | |
| 187 | /* driver doesn't support power save */ |
| 188 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) |
| 189 | return TX_CONTINUE; |
| 190 | |
| 191 | /* hardware does dynamic power save */ |
| 192 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) |
| 193 | return TX_CONTINUE; |
| 194 | |
| 195 | /* dynamic power save disabled */ |
| 196 | if (local->hw.conf.dynamic_ps_timeout <= 0) |
| 197 | return TX_CONTINUE; |
| 198 | |
| 199 | /* we are scanning, don't enable power save */ |
| 200 | if (local->scanning) |
| 201 | return TX_CONTINUE; |
| 202 | |
| 203 | if (!local->ps_sdata) |
| 204 | return TX_CONTINUE; |
| 205 | |
| 206 | /* No point if we're going to suspend */ |
| 207 | if (local->quiescing) |
| 208 | return TX_CONTINUE; |
| 209 | |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 210 | /* dynamic ps is supported only in managed mode */ |
| 211 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) |
| 212 | return TX_CONTINUE; |
| 213 | |
| 214 | ifmgd = &tx->sdata->u.mgd; |
| 215 | |
| 216 | /* |
| 217 | * Don't wakeup from power save if u-apsd is enabled, voip ac has |
| 218 | * u-apsd enabled and the frame is in voip class. This effectively |
| 219 | * means that even if all access categories have u-apsd enabled, in |
| 220 | * practise u-apsd is only used with the voip ac. This is a |
| 221 | * workaround for the case when received voip class packets do not |
| 222 | * have correct qos tag for some reason, due the network or the |
| 223 | * peer application. |
| 224 | * |
Eliad Peller | dc41e4d | 2012-03-14 16:15:03 +0200 | [diff] [blame] | 225 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 226 | * changed via debugfs, user needs to reassociate manually to have |
| 227 | * everything in sync. |
| 228 | */ |
Johannes Berg | 4875d30d | 2012-03-27 14:18:37 +0200 | [diff] [blame] | 229 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
| 230 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && |
| 231 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) |
Kalle Valo | 0c74211 | 2010-01-12 10:42:53 +0200 | [diff] [blame] | 232 | return TX_CONTINUE; |
| 233 | |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 234 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
| 235 | ieee80211_stop_queues_by_reason(&local->hw, |
| 236 | IEEE80211_QUEUE_STOP_REASON_PS); |
Vivek Natarajan | db28569 | 2011-02-18 17:18:03 +0530 | [diff] [blame] | 237 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 238 | ieee80211_queue_work(&local->hw, |
| 239 | &local->dynamic_ps_disable_work); |
| 240 | } |
| 241 | |
Luciano Coelho | 5db1c07 | 2011-05-03 21:40:08 +0300 | [diff] [blame] | 242 | /* Don't restart the timer if we're not disassociated */ |
| 243 | if (!ifmgd->associated) |
| 244 | return TX_CONTINUE; |
| 245 | |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 246 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 247 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); |
| 248 | |
| 249 | return TX_CONTINUE; |
| 250 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 251 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 252 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 253 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 254 | { |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 255 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 256 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 257 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 258 | bool assoc = false; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 259 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 260 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 261 | return TX_CONTINUE; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 262 | |
Ben Greear | b23b025 | 2011-02-04 11:54:17 -0800 | [diff] [blame] | 263 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
| 264 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && |
Kalle Valo | a9a6fff | 2009-03-18 14:06:44 +0200 | [diff] [blame] | 265 | !ieee80211_is_probe_req(hdr->frame_control) && |
| 266 | !ieee80211_is_nullfunc(hdr->frame_control)) |
| 267 | /* |
| 268 | * When software scanning only nullfunc frames (to notify |
| 269 | * the sleep state to the AP) and probe requests (for the |
| 270 | * active scan) are allowed, all other frames should not be |
| 271 | * sent and we should not get here, but if we do |
| 272 | * nonetheless, drop them to avoid sending them |
| 273 | * off-channel. See the link below and |
| 274 | * ieee80211_start_scan() for more. |
| 275 | * |
| 276 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 |
| 277 | */ |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 278 | return TX_DROP; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 279 | |
Bill Jordan | 1be7fe8 | 2010-10-01 11:20:41 -0400 | [diff] [blame] | 280 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
| 281 | return TX_CONTINUE; |
| 282 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 283 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 284 | return TX_CONTINUE; |
| 285 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 286 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 287 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 288 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 289 | if (tx->sta) |
| 290 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 291 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 292 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 293 | if (unlikely(!assoc && |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 294 | ieee80211_is_data(hdr->frame_control))) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 295 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 296 | sdata_info(tx->sdata, |
| 297 | "dropped data frame to not associated station %pM\n", |
| 298 | hdr->addr1); |
| 299 | #endif |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 300 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 301 | return TX_DROP; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 302 | } |
Johannes Berg | 2962389 | 2011-12-14 12:20:31 +0100 | [diff] [blame] | 303 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 304 | ieee80211_is_data(hdr->frame_control) && |
Felix Fietkau | 030ef8f | 2012-04-23 19:49:02 +0200 | [diff] [blame] | 305 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
Johannes Berg | 2962389 | 2011-12-14 12:20:31 +0100 | [diff] [blame] | 306 | /* |
| 307 | * No associated STAs - no need to send multicast |
| 308 | * frames. |
| 309 | */ |
| 310 | return TX_DROP; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 311 | } |
| 312 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 313 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 314 | } |
| 315 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 316 | /* This function is called whenever the AP is about to exceed the maximum limit |
| 317 | * of buffered frames for power saving STAs. This situation should not really |
| 318 | * happen often during normal operation, so dropping the oldest buffered packet |
| 319 | * from each queue should be OK to make some room for new frames. */ |
| 320 | static void purge_old_ps_buffers(struct ieee80211_local *local) |
| 321 | { |
| 322 | int total = 0, purged = 0; |
| 323 | struct sk_buff *skb; |
| 324 | struct ieee80211_sub_if_data *sdata; |
| 325 | struct sta_info *sta; |
| 326 | |
Johannes Berg | 7901042 | 2007-09-18 17:29:21 -0400 | [diff] [blame] | 327 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 328 | struct ps_data *ps; |
| 329 | |
| 330 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 331 | ps = &sdata->u.ap.ps; |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 332 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
| 333 | ps = &sdata->u.mesh.ps; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 334 | else |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 335 | continue; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 336 | |
| 337 | skb = skb_dequeue(&ps->bc_buf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 338 | if (skb) { |
| 339 | purged++; |
| 340 | dev_kfree_skb(skb); |
| 341 | } |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 342 | total += skb_queue_len(&ps->bc_buf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 343 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 344 | |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 345 | /* |
| 346 | * Drop one frame from each station from the lowest-priority |
| 347 | * AC that has frames at all. |
| 348 | */ |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 349 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 350 | int ac; |
| 351 | |
| 352 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { |
| 353 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); |
| 354 | total += skb_queue_len(&sta->ps_tx_buf[ac]); |
| 355 | if (skb) { |
| 356 | purged++; |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 357 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 358 | break; |
| 359 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 360 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 361 | } |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 362 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 363 | local->total_ps_buffered = total; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 364 | 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] | 365 | } |
| 366 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 367 | static ieee80211_tx_result |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 368 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 369 | { |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 370 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 371 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 372 | struct ps_data *ps; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 373 | |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 374 | /* |
| 375 | * broadcast/multicast frame |
| 376 | * |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 377 | * If any of the associated/peer stations is in power save mode, |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 378 | * the frame is buffered to be sent after DTIM beacon frame. |
| 379 | * This is done either by the hardware or us. |
| 380 | */ |
| 381 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 382 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 383 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
| 384 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
| 385 | if (!tx->sdata->bss) |
| 386 | return TX_CONTINUE; |
| 387 | |
| 388 | ps = &tx->sdata->bss->ps; |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 389 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
| 390 | ps = &tx->sdata->u.mesh.ps; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 391 | } else { |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 392 | return TX_CONTINUE; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Johannes Berg | 3e122be | 2008-07-09 14:40:34 +0200 | [diff] [blame] | 395 | |
| 396 | /* no buffering for ordered frames */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 397 | if (ieee80211_has_order(hdr->frame_control)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 398 | return TX_CONTINUE; |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 399 | |
| 400 | /* no stations in PS mode */ |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 401 | if (!atomic_read(&ps->num_sta_ps)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 402 | return TX_CONTINUE; |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 403 | |
Johannes Berg | 62b517c | 2009-10-29 12:19:21 +0100 | [diff] [blame] | 404 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 405 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
| 406 | info->hw_queue = tx->sdata->vif.cab_queue; |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 407 | |
Johannes Berg | 62b517c | 2009-10-29 12:19:21 +0100 | [diff] [blame] | 408 | /* device releases frame after DTIM beacon */ |
| 409 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 410 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 411 | |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 412 | /* buffered in mac80211 */ |
| 413 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
| 414 | purge_old_ps_buffers(tx->local); |
Johannes Berg | 7d54d0d | 2007-12-19 01:31:25 +0100 | [diff] [blame] | 415 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 416 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 417 | ps_dbg(tx->sdata, |
| 418 | "BC TX buffer full - dropping the oldest frame\n"); |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 419 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 420 | } else |
| 421 | tx->local->total_ps_buffered++; |
| 422 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 423 | skb_queue_tail(&ps->bc_buf, tx->skb); |
Johannes Berg | 62b1208 | 2009-08-10 16:04:15 +0200 | [diff] [blame] | 424 | |
| 425 | return TX_QUEUED; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 426 | } |
| 427 | |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 428 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
| 429 | struct sk_buff *skb) |
| 430 | { |
| 431 | if (!ieee80211_is_mgmt(fc)) |
| 432 | return 0; |
| 433 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 434 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 435 | return 0; |
| 436 | |
| 437 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) |
| 438 | skb->data)) |
| 439 | return 0; |
| 440 | |
| 441 | return 1; |
| 442 | } |
| 443 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 444 | static ieee80211_tx_result |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 445 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 446 | { |
| 447 | struct sta_info *sta = tx->sta; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 448 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 449 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Juuso Oikarinen | 3393a60 | 2010-04-19 10:12:52 +0300 | [diff] [blame] | 450 | struct ieee80211_local *local = tx->local; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 451 | |
Johannes Berg | 02f2f1a | 2012-02-27 12:18:30 +0100 | [diff] [blame] | 452 | if (unlikely(!sta)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 453 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 454 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 455 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
| 456 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) && |
Johannes Berg | 02f2f1a | 2012-02-27 12:18:30 +0100 | [diff] [blame] | 457 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 458 | int ac = skb_get_queue_mapping(tx->skb); |
| 459 | |
Johannes Berg | 02f2f1a | 2012-02-27 12:18:30 +0100 | [diff] [blame] | 460 | /* only deauth, disassoc and action are bufferable MMPDUs */ |
| 461 | if (ieee80211_is_mgmt(hdr->frame_control) && |
| 462 | !ieee80211_is_deauth(hdr->frame_control) && |
| 463 | !ieee80211_is_disassoc(hdr->frame_control) && |
| 464 | !ieee80211_is_action(hdr->frame_control)) { |
| 465 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; |
| 466 | return TX_CONTINUE; |
| 467 | } |
| 468 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 469 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
| 470 | sta->sta.addr, sta->sta.aid, ac); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 471 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
| 472 | purge_old_ps_buffers(tx->local); |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 473 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
| 474 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 475 | ps_dbg(tx->sdata, |
| 476 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", |
| 477 | sta->sta.addr, ac); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 478 | ieee80211_free_txskb(&local->hw, old); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 479 | } else |
| 480 | tx->local->total_ps_buffered++; |
Johannes Berg | 004c872 | 2008-02-20 11:21:35 +0100 | [diff] [blame] | 481 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 482 | info->control.jiffies = jiffies; |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 483 | info->control.vif = &tx->sdata->vif; |
Johannes Berg | 8f77f38 | 2009-06-07 21:58:37 +0200 | [diff] [blame] | 484 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 485 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
Juuso Oikarinen | 3393a60 | 2010-04-19 10:12:52 +0300 | [diff] [blame] | 486 | |
| 487 | if (!timer_pending(&local->sta_cleanup)) |
| 488 | mod_timer(&local->sta_cleanup, |
| 489 | round_jiffies(jiffies + |
| 490 | STA_INFO_CLEANUP_INTERVAL)); |
| 491 | |
Johannes Berg | c868cb35 | 2011-09-29 16:04:27 +0200 | [diff] [blame] | 492 | /* |
| 493 | * We queued up some frames, so the TIM bit might |
| 494 | * need to be set, recalculate it. |
| 495 | */ |
| 496 | sta_info_recalc_tim(sta); |
| 497 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 498 | return TX_QUEUED; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 499 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
| 500 | ps_dbg(tx->sdata, |
| 501 | "STA %pM in PS mode, but polling/in SP -> send frame\n", |
| 502 | sta->sta.addr); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 503 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 504 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 505 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 506 | } |
| 507 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 508 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 509 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 510 | { |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 511 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 512 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 513 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 514 | if (tx->flags & IEEE80211_TX_UNICAST) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 515 | return ieee80211_tx_h_unicast_ps_buf(tx); |
| 516 | else |
| 517 | return ieee80211_tx_h_multicast_ps_buf(tx); |
| 518 | } |
| 519 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 520 | static ieee80211_tx_result debug_noinline |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 521 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) |
| 522 | { |
| 523 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
| 524 | |
| 525 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && |
| 526 | tx->sdata->control_port_no_encrypt)) |
| 527 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 528 | |
| 529 | return TX_CONTINUE; |
| 530 | } |
| 531 | |
| 532 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 533 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 534 | { |
Johannes Berg | 46e6de1 | 2012-07-04 18:10:07 +0200 | [diff] [blame] | 535 | struct ieee80211_key *key; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 536 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 537 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 538 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 539 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 540 | tx->key = NULL; |
Johannes Berg | e31b821 | 2010-10-05 19:39:30 +0200 | [diff] [blame] | 541 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 542 | tx->key = key; |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 543 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
Jouni Malinen | ecbcd32 | 2010-03-29 23:35:23 -0700 | [diff] [blame] | 544 | is_multicast_ether_addr(hdr->addr1) && |
| 545 | ieee80211_is_robust_mgmt_frame(hdr) && |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 546 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
| 547 | tx->key = key; |
Johannes Berg | f7e0104 | 2010-12-09 19:49:02 +0100 | [diff] [blame] | 548 | else if (is_multicast_ether_addr(hdr->addr1) && |
| 549 | (key = rcu_dereference(tx->sdata->default_multicast_key))) |
| 550 | tx->key = key; |
| 551 | else if (!is_multicast_ether_addr(hdr->addr1) && |
| 552 | (key = rcu_dereference(tx->sdata->default_unicast_key))) |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 553 | tx->key = key; |
Johannes Berg | 46e6de1 | 2012-07-04 18:10:07 +0200 | [diff] [blame] | 554 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
| 555 | tx->key = NULL; |
| 556 | else if (!tx->sdata->drop_unencrypted) |
| 557 | tx->key = NULL; |
| 558 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) |
| 559 | tx->key = NULL; |
| 560 | else if (ieee80211_is_robust_mgmt_frame(hdr) && |
| 561 | !(ieee80211_is_action(hdr->frame_control) && |
| 562 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) |
| 563 | tx->key = NULL; |
Nicolas Cavallari | 4922f71 | 2012-07-04 18:10:08 +0200 | [diff] [blame] | 564 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
| 565 | !ieee80211_is_robust_mgmt_frame(hdr)) |
| 566 | tx->key = NULL; |
Johannes Berg | 46e6de1 | 2012-07-04 18:10:07 +0200 | [diff] [blame] | 567 | else { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 568 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 569 | return TX_DROP; |
Johannes Berg | 46e6de1 | 2012-07-04 18:10:07 +0200 | [diff] [blame] | 570 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 571 | |
| 572 | if (tx->key) { |
Johannes Berg | 813d766 | 2010-01-17 01:47:58 +0100 | [diff] [blame] | 573 | bool skip_hw = false; |
| 574 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 575 | tx->key->tx_rx_count++; |
Johannes Berg | 011bfcc | 2007-09-17 01:29:25 -0400 | [diff] [blame] | 576 | /* TODO: add threshold stuff again */ |
Johannes Berg | 176e4f8 | 2007-12-18 15:27:47 +0100 | [diff] [blame] | 577 | |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 578 | switch (tx->key->conf.cipher) { |
| 579 | case WLAN_CIPHER_SUITE_WEP40: |
| 580 | case WLAN_CIPHER_SUITE_WEP104: |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 581 | case WLAN_CIPHER_SUITE_TKIP: |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 582 | if (!ieee80211_is_data_present(hdr->frame_control)) |
Johannes Berg | 176e4f8 | 2007-12-18 15:27:47 +0100 | [diff] [blame] | 583 | tx->key = NULL; |
| 584 | break; |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 585 | case WLAN_CIPHER_SUITE_CCMP: |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 586 | if (!ieee80211_is_data_present(hdr->frame_control) && |
| 587 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, |
| 588 | tx->skb)) |
| 589 | tx->key = NULL; |
Kalle Valo | 3b43a18 | 2010-01-23 20:27:14 +0200 | [diff] [blame] | 590 | else |
| 591 | skip_hw = (tx->key->conf.flags & |
Johannes Berg | e548c49 | 2012-09-04 17:08:23 +0200 | [diff] [blame] | 592 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
Kalle Valo | 3b43a18 | 2010-01-23 20:27:14 +0200 | [diff] [blame] | 593 | ieee80211_is_mgmt(hdr->frame_control); |
Jouni Malinen | fb73333 | 2009-01-08 13:32:00 +0200 | [diff] [blame] | 594 | break; |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 595 | case WLAN_CIPHER_SUITE_AES_CMAC: |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 596 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
| 597 | tx->key = NULL; |
| 598 | break; |
Johannes Berg | 176e4f8 | 2007-12-18 15:27:47 +0100 | [diff] [blame] | 599 | } |
Johannes Berg | 813d766 | 2010-01-17 01:47:58 +0100 | [diff] [blame] | 600 | |
Johannes Berg | e54faf2 | 2013-01-29 11:41:38 +0100 | [diff] [blame] | 601 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
| 602 | !ieee80211_is_deauth(hdr->frame_control))) |
Johannes Berg | 95acac6 | 2011-07-12 12:30:59 +0200 | [diff] [blame] | 603 | return TX_DROP; |
| 604 | |
Johannes Berg | f12553e | 2010-01-22 22:07:59 +0100 | [diff] [blame] | 605 | if (!skip_hw && tx->key && |
Johannes Berg | 382b165 | 2010-01-25 11:36:16 +0100 | [diff] [blame] | 606 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
Johannes Berg | 813d766 | 2010-01-17 01:47:58 +0100 | [diff] [blame] | 607 | info->control.hw_key = &tx->key->conf; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 608 | } |
| 609 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 610 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 611 | } |
| 612 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 613 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 614 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 615 | { |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 616 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 617 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
| 618 | struct ieee80211_supported_band *sband; |
| 619 | struct ieee80211_rate *rate; |
Shanyu Zhao | a2c4024 | 2010-04-27 11:15:12 -0700 | [diff] [blame] | 620 | int i; |
| 621 | u32 len; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 622 | bool inval = false, rts = false, short_preamble = false; |
| 623 | struct ieee80211_tx_rate_control txrc; |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 624 | bool assoc = false; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 625 | |
| 626 | memset(&txrc, 0, sizeof(txrc)); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 627 | |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 628 | sband = tx->local->hw.wiphy->bands[info->band]; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 629 | |
Shanyu Zhao | a2c4024 | 2010-04-27 11:15:12 -0700 | [diff] [blame] | 630 | len = min_t(u32, tx->skb->len + FCS_LEN, |
Jouni Malinen | b9a5f8ca | 2009-04-20 18:39:05 +0200 | [diff] [blame] | 631 | tx->local->hw.wiphy->frag_threshold); |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 632 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 633 | /* set up the tx rate control struct we give the RC algo */ |
Johannes Berg | 005e472 | 2012-02-26 11:24:35 +0100 | [diff] [blame] | 634 | txrc.hw = &tx->local->hw; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 635 | txrc.sband = sband; |
| 636 | txrc.bss_conf = &tx->sdata->vif.bss_conf; |
| 637 | txrc.skb = tx->skb; |
| 638 | txrc.reported_rate.idx = -1; |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 639 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
Jouni Malinen | 37eb0b1 | 2010-01-06 13:09:08 +0200 | [diff] [blame] | 640 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
| 641 | txrc.max_rate_idx = -1; |
| 642 | else |
| 643 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; |
Simon Wunderlich | 1946841 | 2012-01-28 17:25:33 +0100 | [diff] [blame] | 644 | memcpy(txrc.rate_idx_mcs_mask, |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 645 | tx->sdata->rc_rateidx_mcs_mask[info->band], |
Simon Wunderlich | 1946841 | 2012-01-28 17:25:33 +0100 | [diff] [blame] | 646 | sizeof(txrc.rate_idx_mcs_mask)); |
Felix Fietkau | 8f0729b | 2010-11-11 15:07:23 +0100 | [diff] [blame] | 647 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
Chun-Yeow Yeoh | 4bb6234 | 2011-11-24 17:15:20 -0800 | [diff] [blame] | 648 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
Felix Fietkau | 8f0729b | 2010-11-11 15:07:23 +0100 | [diff] [blame] | 649 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 650 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 651 | /* set up RTS protection if desired */ |
Jouni Malinen | b9a5f8ca | 2009-04-20 18:39:05 +0200 | [diff] [blame] | 652 | if (len > tx->local->hw.wiphy->rts_threshold) { |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 653 | txrc.rts = rts = true; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 654 | } |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 655 | |
| 656 | /* |
| 657 | * Use short preamble if the BSS can handle it, but not for |
| 658 | * management frames unless we know the receiver can handle |
| 659 | * that -- the management frame might be to a station that |
| 660 | * just wants a probe response. |
| 661 | */ |
| 662 | if (tx->sdata->vif.bss_conf.use_short_preamble && |
| 663 | (ieee80211_is_data(hdr->frame_control) || |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 664 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 665 | txrc.short_preamble = short_preamble = true; |
| 666 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 667 | if (tx->sta) |
| 668 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 669 | |
Luis R. Rodriguez | b770b43 | 2009-07-16 10:15:09 -0700 | [diff] [blame] | 670 | /* |
| 671 | * Lets not bother rate control if we're associated and cannot |
| 672 | * talk to the sta. This should not happen. |
| 673 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 674 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
Luis R. Rodriguez | b770b43 | 2009-07-16 10:15:09 -0700 | [diff] [blame] | 675 | !rate_usable_index_exists(sband, &tx->sta->sta), |
| 676 | "%s: Dropped data frame as no usable bitrate found while " |
| 677 | "scanning and associated. Target station: " |
| 678 | "%pM on %d GHz band\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 679 | tx->sdata->name, hdr->addr1, |
Johannes Berg | 2d56577 | 2012-07-23 15:12:51 +0200 | [diff] [blame] | 680 | info->band ? 5 : 2)) |
Luis R. Rodriguez | b770b43 | 2009-07-16 10:15:09 -0700 | [diff] [blame] | 681 | return TX_DROP; |
| 682 | |
| 683 | /* |
| 684 | * If we're associated with the sta at this point we know we can at |
| 685 | * least send the frame at the lowest bit rate. |
| 686 | */ |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 687 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
| 688 | |
| 689 | if (unlikely(info->control.rates[0].idx < 0)) |
| 690 | return TX_DROP; |
| 691 | |
Helmut Schaa | c1ce5a7 | 2010-12-01 16:34:45 +0100 | [diff] [blame] | 692 | if (txrc.reported_rate.idx < 0) { |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 693 | txrc.reported_rate = info->control.rates[0]; |
Helmut Schaa | c1ce5a7 | 2010-12-01 16:34:45 +0100 | [diff] [blame] | 694 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
| 695 | tx->sta->last_tx_rate = txrc.reported_rate; |
| 696 | } else if (tx->sta) |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 697 | tx->sta->last_tx_rate = txrc.reported_rate; |
| 698 | |
| 699 | if (unlikely(!info->control.rates[0].count)) |
| 700 | info->control.rates[0].count = 1; |
| 701 | |
Gábor Stefanik | 9955151 | 2009-04-23 19:36:14 +0200 | [diff] [blame] | 702 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
| 703 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) |
| 704 | info->control.rates[0].count = 1; |
| 705 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 706 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 707 | /* |
| 708 | * XXX: verify the rate is in the basic rateset |
| 709 | */ |
| 710 | return TX_CONTINUE; |
| 711 | } |
| 712 | |
| 713 | /* |
| 714 | * set up the RTS/CTS rate as the fastest basic rate |
| 715 | * that is not faster than the data rate |
| 716 | * |
| 717 | * XXX: Should this check all retry rates? |
| 718 | */ |
| 719 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { |
| 720 | s8 baserate = 0; |
| 721 | |
| 722 | rate = &sband->bitrates[info->control.rates[0].idx]; |
| 723 | |
| 724 | for (i = 0; i < sband->n_bitrates; i++) { |
| 725 | /* must be a basic rate */ |
| 726 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) |
| 727 | continue; |
| 728 | /* must not be faster than the data rate */ |
| 729 | if (sband->bitrates[i].bitrate > rate->bitrate) |
| 730 | continue; |
| 731 | /* maximum */ |
| 732 | if (sband->bitrates[baserate].bitrate < |
| 733 | sband->bitrates[i].bitrate) |
| 734 | baserate = i; |
| 735 | } |
| 736 | |
| 737 | info->control.rts_cts_rate_idx = baserate; |
| 738 | } |
| 739 | |
| 740 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
| 741 | /* |
| 742 | * make sure there's no valid rate following |
| 743 | * an invalid one, just in case drivers don't |
| 744 | * take the API seriously to stop at -1. |
| 745 | */ |
| 746 | if (inval) { |
| 747 | info->control.rates[i].idx = -1; |
| 748 | continue; |
| 749 | } |
| 750 | if (info->control.rates[i].idx < 0) { |
| 751 | inval = true; |
| 752 | continue; |
| 753 | } |
| 754 | |
| 755 | /* |
| 756 | * For now assume MCS is already set up correctly, this |
| 757 | * needs to be fixed. |
| 758 | */ |
| 759 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { |
| 760 | WARN_ON(info->control.rates[i].idx > 76); |
| 761 | continue; |
| 762 | } |
| 763 | |
| 764 | /* set up RTS protection if desired */ |
| 765 | if (rts) |
| 766 | info->control.rates[i].flags |= |
| 767 | IEEE80211_TX_RC_USE_RTS_CTS; |
| 768 | |
| 769 | /* RC is busted */ |
Sujith | 075cbc9 | 2008-10-23 12:14:02 +0530 | [diff] [blame] | 770 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
| 771 | sband->n_bitrates)) { |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 772 | info->control.rates[i].idx = -1; |
| 773 | continue; |
| 774 | } |
| 775 | |
| 776 | rate = &sband->bitrates[info->control.rates[i].idx]; |
| 777 | |
| 778 | /* set up short preamble */ |
| 779 | if (short_preamble && |
| 780 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) |
| 781 | info->control.rates[i].flags |= |
| 782 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; |
| 783 | |
| 784 | /* set up G protection */ |
| 785 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && |
| 786 | rate->flags & IEEE80211_RATE_ERP_G) |
| 787 | info->control.rates[i].flags |= |
| 788 | IEEE80211_TX_RC_USE_CTS_PROTECT; |
| 789 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 790 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 791 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 792 | } |
| 793 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 794 | static ieee80211_tx_result debug_noinline |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 795 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) |
| 796 | { |
| 797 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
| 798 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
| 799 | u16 *seq; |
| 800 | u8 *qc; |
| 801 | int tid; |
| 802 | |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 803 | /* |
| 804 | * Packet injection may want to control the sequence |
| 805 | * number, if we have no matching interface then we |
| 806 | * neither assign one ourselves nor ask the driver to. |
| 807 | */ |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 808 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
Johannes Berg | 25d834e | 2008-09-12 22:52:47 +0200 | [diff] [blame] | 809 | return TX_CONTINUE; |
| 810 | |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 811 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
| 812 | return TX_CONTINUE; |
| 813 | |
| 814 | if (ieee80211_hdrlen(hdr->frame_control) < 24) |
| 815 | return TX_CONTINUE; |
| 816 | |
Johannes Berg | 49a5954 | 2011-09-29 16:04:41 +0200 | [diff] [blame] | 817 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
| 818 | return TX_CONTINUE; |
| 819 | |
Johannes Berg | 9477828 | 2008-10-10 13:21:59 +0200 | [diff] [blame] | 820 | /* |
| 821 | * Anything but QoS data that has a sequence number field |
| 822 | * (is long enough) gets a sequence number from the global |
| 823 | * counter. |
| 824 | */ |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 825 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
Johannes Berg | 9477828 | 2008-10-10 13:21:59 +0200 | [diff] [blame] | 826 | /* driver should assign sequence number */ |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 827 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
Johannes Berg | 9477828 | 2008-10-10 13:21:59 +0200 | [diff] [blame] | 828 | /* for pure STA mode without beacons, we can do it */ |
| 829 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); |
| 830 | tx->sdata->sequence_number += 0x10; |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 831 | return TX_CONTINUE; |
| 832 | } |
| 833 | |
| 834 | /* |
| 835 | * This should be true for injected/management frames only, for |
| 836 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ |
| 837 | * above since they are not QoS-data frames. |
| 838 | */ |
| 839 | if (!tx->sta) |
| 840 | return TX_CONTINUE; |
| 841 | |
| 842 | /* include per-STA, per-TID sequence counter */ |
| 843 | |
| 844 | qc = ieee80211_get_qos_ctl(hdr); |
| 845 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
| 846 | seq = &tx->sta->tid_seq[tid]; |
| 847 | |
| 848 | hdr->seq_ctrl = cpu_to_le16(*seq); |
| 849 | |
| 850 | /* Increase the sequence number. */ |
| 851 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; |
| 852 | |
| 853 | return TX_CONTINUE; |
| 854 | } |
| 855 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 856 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 857 | struct sk_buff *skb, int hdrlen, |
| 858 | int frag_threshold) |
| 859 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 860 | struct ieee80211_local *local = tx->local; |
Johannes Berg | a1a3fce | 2011-11-16 15:28:56 +0100 | [diff] [blame] | 861 | struct ieee80211_tx_info *info; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 862 | struct sk_buff *tmp; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 863 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
| 864 | int pos = hdrlen + per_fragm; |
| 865 | int rem = skb->len - hdrlen - per_fragm; |
| 866 | |
| 867 | if (WARN_ON(rem < 0)) |
| 868 | return -EINVAL; |
| 869 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 870 | /* first fragment was already added to queue by caller */ |
| 871 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 872 | while (rem) { |
| 873 | int fraglen = per_fragm; |
| 874 | |
| 875 | if (fraglen > rem) |
| 876 | fraglen = rem; |
| 877 | rem -= fraglen; |
| 878 | tmp = dev_alloc_skb(local->tx_headroom + |
| 879 | frag_threshold + |
| 880 | IEEE80211_ENCRYPT_HEADROOM + |
| 881 | IEEE80211_ENCRYPT_TAILROOM); |
| 882 | if (!tmp) |
| 883 | return -ENOMEM; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 884 | |
| 885 | __skb_queue_tail(&tx->skbs, tmp); |
| 886 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 887 | skb_reserve(tmp, local->tx_headroom + |
| 888 | IEEE80211_ENCRYPT_HEADROOM); |
| 889 | /* copy control information */ |
| 890 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); |
Johannes Berg | a1a3fce | 2011-11-16 15:28:56 +0100 | [diff] [blame] | 891 | |
| 892 | info = IEEE80211_SKB_CB(tmp); |
| 893 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | |
| 894 | IEEE80211_TX_CTL_FIRST_FRAGMENT); |
| 895 | |
| 896 | if (rem) |
| 897 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; |
| 898 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 899 | skb_copy_queue_mapping(tmp, skb); |
| 900 | tmp->priority = skb->priority; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 901 | tmp->dev = skb->dev; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 902 | |
| 903 | /* copy header and data */ |
| 904 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); |
| 905 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); |
| 906 | |
| 907 | pos += fraglen; |
| 908 | } |
| 909 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 910 | /* adjust first fragment's length */ |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 911 | skb->len = hdrlen + per_fragm; |
| 912 | return 0; |
| 913 | } |
| 914 | |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 915 | static ieee80211_tx_result debug_noinline |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 916 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
| 917 | { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 918 | struct sk_buff *skb = tx->skb; |
| 919 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 920 | struct ieee80211_hdr *hdr = (void *)skb->data; |
Jouni Malinen | b9a5f8ca | 2009-04-20 18:39:05 +0200 | [diff] [blame] | 921 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 922 | int hdrlen; |
| 923 | int fragnum; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 924 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 925 | /* no matter what happens, tx->skb moves to tx->skbs */ |
| 926 | __skb_queue_tail(&tx->skbs, skb); |
| 927 | tx->skb = NULL; |
| 928 | |
Johannes Berg | a26eb27 | 2011-10-07 14:01:25 +0200 | [diff] [blame] | 929 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
| 930 | return TX_CONTINUE; |
| 931 | |
| 932 | if (tx->local->ops->set_frag_threshold) |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 933 | return TX_CONTINUE; |
| 934 | |
Johannes Berg | eefce91 | 2008-05-17 00:57:13 +0200 | [diff] [blame] | 935 | /* |
| 936 | * Warn when submitting a fragmented A-MPDU frame and drop it. |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 937 | * This scenario is handled in ieee80211_tx_prepare but extra |
Ron Rindjunsky | 8d5e0d5 | 2008-06-12 15:42:29 +0300 | [diff] [blame] | 938 | * caution taken here as fragmented ampdu may cause Tx stop. |
Johannes Berg | eefce91 | 2008-05-17 00:57:13 +0200 | [diff] [blame] | 939 | */ |
Sujith | 8b30b1f | 2008-10-24 09:55:27 +0530 | [diff] [blame] | 940 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
Johannes Berg | eefce91 | 2008-05-17 00:57:13 +0200 | [diff] [blame] | 941 | return TX_DROP; |
| 942 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 943 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 944 | |
Johannes Berg | a26eb27 | 2011-10-07 14:01:25 +0200 | [diff] [blame] | 945 | /* internal error, why isn't DONTFRAG set? */ |
Johannes Berg | 8ccd8f2 | 2009-04-29 23:35:56 +0200 | [diff] [blame] | 946 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 947 | return TX_DROP; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 948 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 949 | /* |
| 950 | * Now fragment the frame. This will allocate all the fragments and |
| 951 | * chain them (using skb as the first fragment) to skb->next. |
| 952 | * During transmission, we will remove the successfully transmitted |
| 953 | * fragments from this list. When the low-level driver rejects one |
| 954 | * of the fragments then we will simply pretend to accept the skb |
| 955 | * but store it away as pending. |
| 956 | */ |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 957 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 958 | return TX_DROP; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 959 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 960 | /* update duration/seq/flags of fragments */ |
| 961 | fragnum = 0; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 962 | |
| 963 | skb_queue_walk(&tx->skbs, skb) { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 964 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 965 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 966 | hdr = (void *)skb->data; |
| 967 | info = IEEE80211_SKB_CB(skb); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 968 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 969 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 970 | hdr->frame_control |= morefrags; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 971 | /* |
| 972 | * No multi-rate retries for fragmented frames, that |
| 973 | * would completely throw off the NAV at other STAs. |
| 974 | */ |
| 975 | info->control.rates[1].idx = -1; |
| 976 | info->control.rates[2].idx = -1; |
| 977 | info->control.rates[3].idx = -1; |
Thomas Huehn | e3e1a0b | 2012-07-02 19:46:16 +0200 | [diff] [blame] | 978 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 979 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 980 | } else { |
| 981 | hdr->frame_control &= ~morefrags; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 982 | } |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 983 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
| 984 | fragnum++; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 985 | } |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 986 | |
| 987 | return TX_CONTINUE; |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 988 | } |
| 989 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 990 | static ieee80211_tx_result debug_noinline |
Johannes Berg | feff1f2 | 2009-08-10 16:01:54 +0200 | [diff] [blame] | 991 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) |
| 992 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 993 | struct sk_buff *skb; |
Johannes Berg | feff1f2 | 2009-08-10 16:01:54 +0200 | [diff] [blame] | 994 | |
| 995 | if (!tx->sta) |
| 996 | return TX_CONTINUE; |
| 997 | |
| 998 | tx->sta->tx_packets++; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 999 | skb_queue_walk(&tx->skbs, skb) { |
Johannes Berg | feff1f2 | 2009-08-10 16:01:54 +0200 | [diff] [blame] | 1000 | tx->sta->tx_fragments++; |
| 1001 | tx->sta->tx_bytes += skb->len; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1002 | } |
Johannes Berg | feff1f2 | 2009-08-10 16:01:54 +0200 | [diff] [blame] | 1003 | |
| 1004 | return TX_CONTINUE; |
| 1005 | } |
| 1006 | |
| 1007 | static ieee80211_tx_result debug_noinline |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1008 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
| 1009 | { |
| 1010 | if (!tx->key) |
| 1011 | return TX_CONTINUE; |
| 1012 | |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1013 | switch (tx->key->conf.cipher) { |
| 1014 | case WLAN_CIPHER_SUITE_WEP40: |
| 1015 | case WLAN_CIPHER_SUITE_WEP104: |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1016 | return ieee80211_crypto_wep_encrypt(tx); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1017 | case WLAN_CIPHER_SUITE_TKIP: |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1018 | return ieee80211_crypto_tkip_encrypt(tx); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1019 | case WLAN_CIPHER_SUITE_CCMP: |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1020 | return ieee80211_crypto_ccmp_encrypt(tx); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1021 | case WLAN_CIPHER_SUITE_AES_CMAC: |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 1022 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
Johannes Berg | 3ffc2a9 | 2010-08-27 14:26:52 +0300 | [diff] [blame] | 1023 | default: |
Yoni Divinsky | d32a102 | 2012-01-16 15:18:59 +0200 | [diff] [blame] | 1024 | return ieee80211_crypto_hw_encrypt(tx); |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1025 | } |
| 1026 | |
Johannes Berg | e245494 | 2008-05-15 12:55:28 +0200 | [diff] [blame] | 1027 | return TX_DROP; |
| 1028 | } |
| 1029 | |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 1030 | static ieee80211_tx_result debug_noinline |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1031 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
| 1032 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1033 | struct sk_buff *skb; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1034 | struct ieee80211_hdr *hdr; |
| 1035 | int next_len; |
| 1036 | bool group_addr; |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1037 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1038 | skb_queue_walk(&tx->skbs, skb) { |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1039 | hdr = (void *) skb->data; |
Jouni Malinen | 7e0aae4 | 2009-05-19 19:25:58 +0300 | [diff] [blame] | 1040 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
| 1041 | break; /* must not overwrite AID */ |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1042 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
| 1043 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); |
| 1044 | next_len = next->len; |
| 1045 | } else |
| 1046 | next_len = 0; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1047 | group_addr = is_multicast_ether_addr(hdr->addr1); |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1048 | |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1049 | hdr->duration_id = |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1050 | ieee80211_duration(tx, skb, group_addr, next_len); |
| 1051 | } |
Johannes Berg | 03f93c3 | 2008-06-25 14:36:27 +0300 | [diff] [blame] | 1052 | |
| 1053 | return TX_CONTINUE; |
| 1054 | } |
| 1055 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1056 | /* actual transmit path */ |
| 1057 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1058 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
| 1059 | struct sk_buff *skb, |
| 1060 | struct ieee80211_tx_info *info, |
| 1061 | struct tid_ampdu_tx *tid_tx, |
| 1062 | int tid) |
| 1063 | { |
| 1064 | bool queued = false; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1065 | bool reset_agg_timer = false; |
Helmut Schaa | aa45458 | 2012-03-07 17:20:30 +0100 | [diff] [blame] | 1066 | struct sk_buff *purge_skb = NULL; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1067 | |
| 1068 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { |
| 1069 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1070 | reset_agg_timer = true; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 1071 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
| 1072 | /* |
| 1073 | * nothing -- this aggregation session is being started |
| 1074 | * but that might still fail with the driver |
| 1075 | */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1076 | } else { |
| 1077 | spin_lock(&tx->sta->lock); |
| 1078 | /* |
| 1079 | * Need to re-check now, because we may get here |
| 1080 | * |
| 1081 | * 1) in the window during which the setup is actually |
| 1082 | * already done, but not marked yet because not all |
| 1083 | * packets are spliced over to the driver pending |
| 1084 | * queue yet -- if this happened we acquire the lock |
| 1085 | * either before or after the splice happens, but |
| 1086 | * need to recheck which of these cases happened. |
| 1087 | * |
| 1088 | * 2) during session teardown, if the OPERATIONAL bit |
| 1089 | * was cleared due to the teardown but the pointer |
| 1090 | * hasn't been assigned NULL yet (or we loaded it |
| 1091 | * before it was assigned) -- in this case it may |
| 1092 | * now be NULL which means we should just let the |
| 1093 | * packet pass through because splicing the frames |
| 1094 | * back is already done. |
| 1095 | */ |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1096 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1097 | |
| 1098 | if (!tid_tx) { |
| 1099 | /* do nothing, let packet pass through */ |
| 1100 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { |
| 1101 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1102 | reset_agg_timer = true; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1103 | } else { |
| 1104 | queued = true; |
| 1105 | info->control.vif = &tx->sdata->vif; |
| 1106 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
| 1107 | __skb_queue_tail(&tid_tx->pending, skb); |
Helmut Schaa | aa45458 | 2012-03-07 17:20:30 +0100 | [diff] [blame] | 1108 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
| 1109 | purge_skb = __skb_dequeue(&tid_tx->pending); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1110 | } |
| 1111 | spin_unlock(&tx->sta->lock); |
Helmut Schaa | aa45458 | 2012-03-07 17:20:30 +0100 | [diff] [blame] | 1112 | |
| 1113 | if (purge_skb) |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1114 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1115 | } |
| 1116 | |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1117 | /* reset session timer */ |
| 1118 | if (reset_agg_timer && tid_tx->timeout) |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 1119 | tid_tx->last_tx = jiffies; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1120 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1121 | return queued; |
| 1122 | } |
| 1123 | |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1124 | /* |
| 1125 | * initialises @tx |
| 1126 | */ |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1127 | static ieee80211_tx_result |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1128 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
| 1129 | struct ieee80211_tx_data *tx, |
| 1130 | struct sk_buff *skb) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1131 | { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1132 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1133 | struct ieee80211_hdr *hdr; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1134 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 68f2b51 | 2011-10-07 14:01:24 +0200 | [diff] [blame] | 1135 | int tid; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1136 | u8 *qc; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1137 | |
| 1138 | memset(tx, 0, sizeof(*tx)); |
| 1139 | tx->skb = skb; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1140 | tx->local = local; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1141 | tx->sdata = sdata; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1142 | __skb_queue_head_init(&tx->skbs); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1143 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1144 | /* |
| 1145 | * If this flag is set to true anywhere, and we get here, |
| 1146 | * we are doing the needed processing, so remove the flag |
| 1147 | * now. |
| 1148 | */ |
| 1149 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
| 1150 | |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1151 | hdr = (struct ieee80211_hdr *) skb->data; |
| 1152 | |
Felix Fietkau | 3f0e0b2 | 2010-01-08 18:15:13 +0100 | [diff] [blame] | 1153 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1154 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
Felix Fietkau | 3f0e0b2 | 2010-01-08 18:15:13 +0100 | [diff] [blame] | 1155 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
| 1156 | return TX_DROP; |
Felix Fietkau | 66f2c99 | 2012-04-29 15:44:16 +0200 | [diff] [blame] | 1157 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED || |
| 1158 | tx->sdata->control_port_protocol == tx->skb->protocol) { |
Felix Fietkau | b4d57ad | 2010-01-31 23:25:24 +0100 | [diff] [blame] | 1159 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
Felix Fietkau | 3f0e0b2 | 2010-01-08 18:15:13 +0100 | [diff] [blame] | 1160 | } |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1161 | if (!tx->sta) |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 1162 | tx->sta = sta_info_get(sdata, hdr->addr1); |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1163 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1164 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
Johannes Berg | 49a5954 | 2011-09-29 16:04:41 +0200 | [diff] [blame] | 1165 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
Arik Nemtsov | edf6b78 | 2011-08-30 09:32:38 +0300 | [diff] [blame] | 1166 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
| 1167 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1168 | struct tid_ampdu_tx *tid_tx; |
| 1169 | |
Sujith | 8b30b1f | 2008-10-24 09:55:27 +0530 | [diff] [blame] | 1170 | qc = ieee80211_get_qos_ctl(hdr); |
| 1171 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
| 1172 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1173 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
| 1174 | if (tid_tx) { |
| 1175 | bool queued; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1176 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 1177 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
| 1178 | tid_tx, tid); |
| 1179 | |
| 1180 | if (unlikely(queued)) |
| 1181 | return TX_QUEUED; |
| 1182 | } |
Sujith | 8b30b1f | 2008-10-24 09:55:27 +0530 | [diff] [blame] | 1183 | } |
| 1184 | |
Jiri Slaby | badffb7 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 1185 | if (is_multicast_ether_addr(hdr->addr1)) { |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1186 | tx->flags &= ~IEEE80211_TX_UNICAST; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1187 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
Simon Wunderlich | 6fd67e9 | 2011-11-18 14:20:42 +0100 | [diff] [blame] | 1188 | } else |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1189 | tx->flags |= IEEE80211_TX_UNICAST; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1190 | |
Johannes Berg | a26eb27 | 2011-10-07 14:01:25 +0200 | [diff] [blame] | 1191 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
| 1192 | if (!(tx->flags & IEEE80211_TX_UNICAST) || |
| 1193 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || |
| 1194 | info->flags & IEEE80211_TX_CTL_AMPDU) |
| 1195 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1196 | } |
| 1197 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1198 | if (!tx->sta) |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1199 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1200 | 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] | 1201 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1202 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1203 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1204 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1205 | return TX_CONTINUE; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1206 | } |
| 1207 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1208 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
| 1209 | struct ieee80211_vif *vif, |
| 1210 | struct ieee80211_sta *sta, |
| 1211 | struct sk_buff_head *skbs, |
| 1212 | bool txpending) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1213 | { |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 1214 | struct ieee80211_tx_control control; |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1215 | struct sk_buff *skb, *tmp; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1216 | unsigned long flags; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1217 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1218 | skb_queue_walk_safe(skbs, skb, tmp) { |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1219 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1220 | int q = info->hw_queue; |
| 1221 | |
| 1222 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 1223 | if (WARN_ON_ONCE(q >= local->hw.queues)) { |
| 1224 | __skb_unlink(skb, skbs); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1225 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1226 | continue; |
| 1227 | } |
| 1228 | #endif |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1229 | |
| 1230 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1231 | if (local->queue_stop_reasons[q] || |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1232 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 1233 | if (unlikely(info->flags & |
| 1234 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK && |
| 1235 | local->queue_stop_reasons[q] & |
| 1236 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL))) { |
| 1237 | /* |
| 1238 | * Drop off-channel frames if queues are stopped |
| 1239 | * for any reason other than off-channel |
| 1240 | * operation. Never queue them. |
| 1241 | */ |
| 1242 | spin_unlock_irqrestore( |
| 1243 | &local->queue_stop_reason_lock, flags); |
| 1244 | ieee80211_purge_tx_queue(&local->hw, skbs); |
| 1245 | return true; |
| 1246 | } |
| 1247 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1248 | /* |
| 1249 | * Since queue is stopped, queue up frames for later |
| 1250 | * transmission from the tx-pending tasklet when the |
| 1251 | * queue is woken again. |
| 1252 | */ |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1253 | if (txpending) |
Johannes Berg | 4db4e0a | 2011-11-24 14:47:36 +0100 | [diff] [blame] | 1254 | skb_queue_splice_init(skbs, &local->pending[q]); |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1255 | else |
Johannes Berg | 4db4e0a | 2011-11-24 14:47:36 +0100 | [diff] [blame] | 1256 | skb_queue_splice_tail_init(skbs, |
| 1257 | &local->pending[q]); |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1258 | |
| 1259 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
| 1260 | flags); |
| 1261 | return false; |
| 1262 | } |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1263 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
Tomas Winkler | f8e79dd | 2008-07-24 18:46:44 +0300 | [diff] [blame] | 1264 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1265 | info->control.vif = vif; |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 1266 | control.sta = sta; |
Johannes Berg | ec25acc | 2010-07-22 17:11:28 +0200 | [diff] [blame] | 1267 | |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1268 | __skb_unlink(skb, skbs); |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 1269 | drv_tx(local, &control, skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1270 | } |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 1271 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1272 | return true; |
| 1273 | } |
| 1274 | |
| 1275 | /* |
| 1276 | * Returns false if the frame couldn't be transmitted but was queued instead. |
| 1277 | */ |
| 1278 | static bool __ieee80211_tx(struct ieee80211_local *local, |
| 1279 | struct sk_buff_head *skbs, int led_len, |
| 1280 | struct sta_info *sta, bool txpending) |
| 1281 | { |
| 1282 | struct ieee80211_tx_info *info; |
| 1283 | struct ieee80211_sub_if_data *sdata; |
| 1284 | struct ieee80211_vif *vif; |
| 1285 | struct ieee80211_sta *pubsta; |
| 1286 | struct sk_buff *skb; |
| 1287 | bool result = true; |
| 1288 | __le16 fc; |
| 1289 | |
| 1290 | if (WARN_ON(skb_queue_empty(skbs))) |
| 1291 | return true; |
| 1292 | |
| 1293 | skb = skb_peek(skbs); |
| 1294 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
| 1295 | info = IEEE80211_SKB_CB(skb); |
| 1296 | sdata = vif_to_sdata(info->control.vif); |
| 1297 | if (sta && !sta->uploaded) |
| 1298 | sta = NULL; |
| 1299 | |
| 1300 | if (sta) |
| 1301 | pubsta = &sta->sta; |
| 1302 | else |
| 1303 | pubsta = NULL; |
| 1304 | |
| 1305 | switch (sdata->vif.type) { |
| 1306 | case NL80211_IFTYPE_MONITOR: |
Johannes Berg | 4b6f1dd | 2012-04-03 14:35:57 +0200 | [diff] [blame] | 1307 | sdata = rcu_dereference(local->monitor_sdata); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1308 | if (sdata) { |
Johannes Berg | 4b6f1dd | 2012-04-03 14:35:57 +0200 | [diff] [blame] | 1309 | vif = &sdata->vif; |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1310 | info->hw_queue = |
| 1311 | vif->hw_queue[skb_get_queue_mapping(skb)]; |
| 1312 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { |
| 1313 | dev_kfree_skb(skb); |
| 1314 | return true; |
| 1315 | } else |
Johannes Berg | 4b6f1dd | 2012-04-03 14:35:57 +0200 | [diff] [blame] | 1316 | vif = NULL; |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1317 | break; |
| 1318 | case NL80211_IFTYPE_AP_VLAN: |
| 1319 | sdata = container_of(sdata->bss, |
| 1320 | struct ieee80211_sub_if_data, u.ap); |
| 1321 | /* fall through */ |
| 1322 | default: |
| 1323 | vif = &sdata->vif; |
| 1324 | break; |
| 1325 | } |
| 1326 | |
Johannes Berg | cb831b5 | 2012-07-02 15:40:18 +0200 | [diff] [blame] | 1327 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
| 1328 | txpending); |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1329 | |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1330 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
| 1331 | ieee80211_led_tx(local, 1); |
| 1332 | |
Johannes Berg | 4db4e0a | 2011-11-24 14:47:36 +0100 | [diff] [blame] | 1333 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1334 | |
Johannes Berg | 11127e9 | 2011-11-16 16:02:47 +0100 | [diff] [blame] | 1335 | return result; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1336 | } |
| 1337 | |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1338 | /* |
| 1339 | * Invoke TX handlers, return 0 on success and non-zero if the |
| 1340 | * frame was dropped or queued. |
| 1341 | */ |
| 1342 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) |
| 1343 | { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1344 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1345 | ieee80211_tx_result res = TX_DROP; |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1346 | |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1347 | #define CALL_TXH(txh) \ |
| 1348 | do { \ |
| 1349 | res = txh(tx); \ |
| 1350 | if (res != TX_CONTINUE) \ |
| 1351 | goto txh_done; \ |
| 1352 | } while (0) |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1353 | |
Kalle Valo | 5c1b98a | 2010-01-12 10:42:46 +0200 | [diff] [blame] | 1354 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1355 | CALL_TXH(ieee80211_tx_h_check_assoc); |
| 1356 | CALL_TXH(ieee80211_tx_h_ps_buf); |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 1357 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1358 | CALL_TXH(ieee80211_tx_h_select_key); |
Johannes Berg | af65cd96 | 2009-11-17 18:18:36 +0100 | [diff] [blame] | 1359 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
| 1360 | CALL_TXH(ieee80211_tx_h_rate_ctrl); |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 1361 | |
Johannes Berg | aa5b549 | 2011-12-02 22:08:52 +0100 | [diff] [blame] | 1362 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
| 1363 | __skb_queue_tail(&tx->skbs, tx->skb); |
| 1364 | tx->skb = NULL; |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 1365 | goto txh_done; |
Johannes Berg | aa5b549 | 2011-12-02 22:08:52 +0100 | [diff] [blame] | 1366 | } |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 1367 | |
| 1368 | CALL_TXH(ieee80211_tx_h_michael_mic_add); |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1369 | CALL_TXH(ieee80211_tx_h_sequence); |
| 1370 | CALL_TXH(ieee80211_tx_h_fragment); |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 1371 | /* handlers after fragment must be aware of tx info fragmentation! */ |
Johannes Berg | 9aa4aee | 2009-10-29 08:43:48 +0100 | [diff] [blame] | 1372 | CALL_TXH(ieee80211_tx_h_stats); |
| 1373 | CALL_TXH(ieee80211_tx_h_encrypt); |
Arik Nemtsov | 8fd369e | 2011-01-31 22:29:12 +0200 | [diff] [blame] | 1374 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
| 1375 | CALL_TXH(ieee80211_tx_h_calculate_duration); |
Johannes Berg | d9e8a70 | 2008-06-30 15:10:44 +0200 | [diff] [blame] | 1376 | #undef CALL_TXH |
| 1377 | |
| 1378 | txh_done: |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1379 | if (unlikely(res == TX_DROP)) { |
Tomas Winkler | 5479d0e | 2008-06-28 03:15:03 +0300 | [diff] [blame] | 1380 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1381 | if (tx->skb) |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1382 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 1383 | else |
Felix Fietkau | 1f98ab7 | 2012-11-10 03:44:14 +0100 | [diff] [blame] | 1384 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1385 | return -1; |
| 1386 | } else if (unlikely(res == TX_QUEUED)) { |
Tomas Winkler | 5479d0e | 2008-06-28 03:15:03 +0300 | [diff] [blame] | 1387 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1388 | return -1; |
| 1389 | } |
| 1390 | |
| 1391 | return 0; |
| 1392 | } |
| 1393 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1394 | /* |
| 1395 | * Returns false if the frame couldn't be transmitted but was queued instead. |
| 1396 | */ |
| 1397 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1398 | struct sk_buff *skb, bool txpending, |
| 1399 | enum ieee80211_band band) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1400 | { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1401 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1402 | struct ieee80211_tx_data tx; |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 1403 | ieee80211_tx_result res_prepare; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1404 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1405 | bool result = true; |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1406 | int led_len; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1407 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1408 | if (unlikely(skb->len < 10)) { |
| 1409 | dev_kfree_skb(skb); |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1410 | return true; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1411 | } |
| 1412 | |
Johannes Berg | 58d4185 | 2007-09-26 17:53:18 +0200 | [diff] [blame] | 1413 | /* initialises tx */ |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1414 | led_len = skb->len; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1415 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1416 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1417 | if (unlikely(res_prepare == TX_DROP)) { |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1418 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1419 | return true; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1420 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1421 | return true; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1422 | } |
| 1423 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1424 | info->band = band; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1425 | |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 1426 | /* set up hw_queue value early */ |
| 1427 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || |
| 1428 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) |
| 1429 | info->hw_queue = |
| 1430 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; |
| 1431 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1432 | if (!invoke_tx_handlers(&tx)) |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 1433 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
| 1434 | tx.sta, txpending); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1435 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 1436 | return result; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1437 | } |
| 1438 | |
| 1439 | /* device xmit handlers */ |
| 1440 | |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1441 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1442 | struct sk_buff *skb, |
| 1443 | int head_need, bool may_encrypt) |
| 1444 | { |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1445 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1446 | int tail_need = 0; |
| 1447 | |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1448 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1449 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
| 1450 | tail_need -= skb_tailroom(skb); |
| 1451 | tail_need = max_t(int, tail_need, 0); |
| 1452 | } |
| 1453 | |
Felix Fietkau | fc7c976 | 2011-02-07 12:05:00 +0100 | [diff] [blame] | 1454 | if (skb_cloned(skb)) |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1455 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
Felix Fietkau | 4cd06a3 | 2010-12-18 19:30:49 +0100 | [diff] [blame] | 1456 | else if (head_need || tail_need) |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1457 | I802_DEBUG_INC(local->tx_expand_skb_head); |
Felix Fietkau | 4cd06a3 | 2010-12-18 19:30:49 +0100 | [diff] [blame] | 1458 | else |
| 1459 | return 0; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1460 | |
| 1461 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { |
Joe Perches | 0fb9a9e | 2010-08-20 16:25:38 -0700 | [diff] [blame] | 1462 | wiphy_debug(local->hw.wiphy, |
| 1463 | "failed to reallocate TX buffer\n"); |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1464 | return -ENOMEM; |
| 1465 | } |
| 1466 | |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1467 | return 0; |
| 1468 | } |
| 1469 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1470 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
| 1471 | enum ieee80211_band band) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1472 | { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1473 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 1474 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 1475 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1476 | int headroom; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1477 | bool may_encrypt; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1478 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1479 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1480 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1481 | headroom = local->tx_headroom; |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 1482 | if (may_encrypt) |
| 1483 | headroom += IEEE80211_ENCRYPT_HEADROOM; |
| 1484 | headroom -= skb_headroom(skb); |
| 1485 | headroom = max_t(int, 0, headroom); |
| 1486 | |
Yogesh Ashok Powar | 3bff186 | 2011-06-28 18:41:37 +0530 | [diff] [blame] | 1487 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 1488 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1489 | return; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1490 | } |
| 1491 | |
Steve deRosier | 740c1aa | 2010-09-11 20:01:31 -0700 | [diff] [blame] | 1492 | hdr = (struct ieee80211_hdr *) skb->data; |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 1493 | info->control.vif = &sdata->vif; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 1494 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 1495 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| 1496 | if (ieee80211_is_data(hdr->frame_control) && |
| 1497 | is_unicast_ether_addr(hdr->addr1)) { |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 1498 | if (mesh_nexthop_resolve(sdata, skb)) |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 1499 | return; /* skb queued: don't free */ |
| 1500 | } else { |
| 1501 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); |
| 1502 | } |
Johannes Berg | 98aed9f | 2012-03-27 14:18:36 +0200 | [diff] [blame] | 1503 | } |
Javier Cardona | cca8949 | 2009-08-10 17:29:29 -0700 | [diff] [blame] | 1504 | |
Javier Cardona | 2154c81 | 2011-09-07 17:49:53 -0700 | [diff] [blame] | 1505 | ieee80211_set_qos_hdr(sdata, skb); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1506 | ieee80211_tx(sdata, skb, false, band); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1507 | } |
| 1508 | |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 1509 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
| 1510 | { |
| 1511 | struct ieee80211_radiotap_iterator iterator; |
| 1512 | struct ieee80211_radiotap_header *rthdr = |
| 1513 | (struct ieee80211_radiotap_header *) skb->data; |
| 1514 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1515 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, |
| 1516 | NULL); |
| 1517 | u16 txflags; |
| 1518 | |
| 1519 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
| 1520 | IEEE80211_TX_CTL_DONTFRAG; |
| 1521 | |
| 1522 | /* |
| 1523 | * for every radiotap entry that is present |
| 1524 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more |
| 1525 | * entries present, or -EINVAL on error) |
| 1526 | */ |
| 1527 | |
| 1528 | while (!ret) { |
| 1529 | ret = ieee80211_radiotap_iterator_next(&iterator); |
| 1530 | |
| 1531 | if (ret) |
| 1532 | continue; |
| 1533 | |
| 1534 | /* see if this argument is something we can use */ |
| 1535 | switch (iterator.this_arg_index) { |
| 1536 | /* |
| 1537 | * You must take care when dereferencing iterator.this_arg |
| 1538 | * for multibyte types... the pointer is not aligned. Use |
| 1539 | * get_unaligned((type *)iterator.this_arg) to dereference |
| 1540 | * iterator.this_arg for type "type" safely on all arches. |
| 1541 | */ |
| 1542 | case IEEE80211_RADIOTAP_FLAGS: |
| 1543 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { |
| 1544 | /* |
| 1545 | * this indicates that the skb we have been |
| 1546 | * handed has the 32-bit FCS CRC at the end... |
| 1547 | * we should react to that by snipping it off |
| 1548 | * because it will be recomputed and added |
| 1549 | * on transmission |
| 1550 | */ |
| 1551 | if (skb->len < (iterator._max_length + FCS_LEN)) |
| 1552 | return false; |
| 1553 | |
| 1554 | skb_trim(skb, skb->len - FCS_LEN); |
| 1555 | } |
| 1556 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) |
| 1557 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 1558 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) |
| 1559 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; |
| 1560 | break; |
| 1561 | |
| 1562 | case IEEE80211_RADIOTAP_TX_FLAGS: |
| 1563 | txflags = get_unaligned_le16(iterator.this_arg); |
| 1564 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) |
| 1565 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
| 1566 | break; |
| 1567 | |
| 1568 | /* |
| 1569 | * Please update the file |
| 1570 | * Documentation/networking/mac80211-injection.txt |
| 1571 | * when parsing new fields here. |
| 1572 | */ |
| 1573 | |
| 1574 | default: |
| 1575 | break; |
| 1576 | } |
| 1577 | } |
| 1578 | |
| 1579 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ |
| 1580 | return false; |
| 1581 | |
| 1582 | /* |
| 1583 | * remove the radiotap header |
| 1584 | * iterator->_max_length was sanity-checked against |
| 1585 | * skb->len by iterator init |
| 1586 | */ |
| 1587 | skb_pull(skb, iterator._max_length); |
| 1588 | |
| 1589 | return true; |
| 1590 | } |
| 1591 | |
Stephen Hemminger | d0cf9c0 | 2009-08-31 19:50:57 +0000 | [diff] [blame] | 1592 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
| 1593 | struct net_device *dev) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1594 | { |
| 1595 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1596 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 1597 | struct ieee80211_channel *chan; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1598 | struct ieee80211_radiotap_header *prthdr = |
| 1599 | (struct ieee80211_radiotap_header *)skb->data; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1600 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Helmut Schaa | f75f5c6 | 2011-08-01 11:32:52 +0200 | [diff] [blame] | 1601 | struct ieee80211_hdr *hdr; |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1602 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 1603 | u16 len_rthdr; |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1604 | int hdrlen; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1605 | |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 1606 | /* check for not even having the fixed radiotap header part */ |
| 1607 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) |
| 1608 | goto fail; /* too short to be possibly valid */ |
| 1609 | |
| 1610 | /* is it a header version we can trust to find length from? */ |
| 1611 | if (unlikely(prthdr->it_version)) |
| 1612 | goto fail; /* only version 0 is supported */ |
| 1613 | |
| 1614 | /* then there must be a radiotap header with a length we can use */ |
| 1615 | len_rthdr = ieee80211_get_radiotap_len(skb->data); |
| 1616 | |
| 1617 | /* does the skb contain enough to deliver on the alleged length? */ |
| 1618 | if (unlikely(skb->len < len_rthdr)) |
| 1619 | goto fail; /* skb too short for claimed rt header extent */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1620 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1621 | /* |
| 1622 | * fix up the pointers accounting for the radiotap |
| 1623 | * header still being in there. We are being given |
| 1624 | * a precooked IEEE80211 header so no need for |
| 1625 | * normal processing |
| 1626 | */ |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 1627 | skb_set_mac_header(skb, len_rthdr); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1628 | /* |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 1629 | * these are just fixed to the end of the rt area since we |
| 1630 | * don't have any better information and at this point, nobody cares |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1631 | */ |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 1632 | skb_set_network_header(skb, len_rthdr); |
| 1633 | skb_set_transport_header(skb, len_rthdr); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1634 | |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1635 | if (skb->len < len_rthdr + 2) |
| 1636 | goto fail; |
| 1637 | |
| 1638 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); |
| 1639 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| 1640 | |
| 1641 | if (skb->len < len_rthdr + hdrlen) |
| 1642 | goto fail; |
| 1643 | |
Helmut Schaa | f75f5c6 | 2011-08-01 11:32:52 +0200 | [diff] [blame] | 1644 | /* |
| 1645 | * Initialize skb->protocol if the injected frame is a data frame |
| 1646 | * carrying a rfc1042 header |
| 1647 | */ |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1648 | if (ieee80211_is_data(hdr->frame_control) && |
| 1649 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { |
| 1650 | u8 *payload = (u8 *)hdr + hdrlen; |
| 1651 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1652 | if (ether_addr_equal(payload, rfc1042_header)) |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1653 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
| 1654 | payload[7]); |
Helmut Schaa | f75f5c6 | 2011-08-01 11:32:52 +0200 | [diff] [blame] | 1655 | } |
| 1656 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 1657 | memset(info, 0, sizeof(*info)); |
| 1658 | |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1659 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
Johannes Berg | 73b9f03 | 2011-10-07 14:01:26 +0200 | [diff] [blame] | 1660 | IEEE80211_TX_CTL_INJECTED; |
| 1661 | |
| 1662 | /* process and remove the injection radiotap header */ |
| 1663 | if (!ieee80211_parse_tx_radiotap(skb)) |
| 1664 | goto fail; |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1665 | |
| 1666 | rcu_read_lock(); |
| 1667 | |
| 1668 | /* |
| 1669 | * We process outgoing injected frames that have a local address |
| 1670 | * we handle as though they are non-injected frames. |
| 1671 | * This code here isn't entirely correct, the local MAC address |
| 1672 | * isn't always enough to find the interface to use; for proper |
| 1673 | * VLAN/WDS support we will need a different mechanism (which |
| 1674 | * likely isn't going to be monitor interfaces). |
| 1675 | */ |
| 1676 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1677 | |
| 1678 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { |
| 1679 | if (!ieee80211_sdata_running(tmp_sdata)) |
| 1680 | continue; |
| 1681 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| 1682 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 1683 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) |
| 1684 | continue; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1685 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1686 | sdata = tmp_sdata; |
| 1687 | break; |
| 1688 | } |
| 1689 | } |
Johannes Berg | 7351c6b | 2009-11-19 01:08:30 +0100 | [diff] [blame] | 1690 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1691 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 1692 | if (!chanctx_conf) { |
| 1693 | tmp_sdata = rcu_dereference(local->monitor_sdata); |
| 1694 | if (tmp_sdata) |
| 1695 | chanctx_conf = |
| 1696 | rcu_dereference(tmp_sdata->vif.chanctx_conf); |
| 1697 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1698 | |
Felix Fietkau | b4a7ff7 | 2013-01-13 23:10:26 +0100 | [diff] [blame] | 1699 | if (chanctx_conf) |
| 1700 | chan = chanctx_conf->def.chan; |
| 1701 | else if (!local->use_chanctx) |
| 1702 | chan = local->_oper_channel; |
| 1703 | else |
| 1704 | goto fail_rcu; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1705 | |
| 1706 | /* |
| 1707 | * Frame injection is not allowed if beaconing is not allowed |
| 1708 | * or if we need radar detection. Beaconing is usually not allowed when |
| 1709 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. |
| 1710 | * Passive scan is also used in world regulatory domains where |
| 1711 | * your country is not known and as such it should be treated as |
| 1712 | * NO TX unless the channel is explicitly allowed in which case |
| 1713 | * your current regulatory domain would not have the passive scan |
| 1714 | * flag. |
| 1715 | * |
| 1716 | * Since AP mode uses monitor interfaces to inject/TX management |
| 1717 | * frames we can make AP mode the exception to this rule once it |
| 1718 | * supports radar detection as its implementation can deal with |
| 1719 | * radar detection by itself. We can do that later by adding a |
| 1720 | * monitor flag interfaces used for AP support. |
| 1721 | */ |
| 1722 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | |
| 1723 | IEEE80211_CHAN_PASSIVE_SCAN))) |
| 1724 | goto fail_rcu; |
| 1725 | |
| 1726 | ieee80211_xmit(sdata, skb, chan->band); |
Johannes Berg | 5d9cf4a | 2011-10-07 14:01:23 +0200 | [diff] [blame] | 1727 | rcu_read_unlock(); |
| 1728 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1729 | return NETDEV_TX_OK; |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 1730 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1731 | fail_rcu: |
| 1732 | rcu_read_unlock(); |
Andy Green | 9b8a74e | 2007-07-27 15:43:24 +0200 | [diff] [blame] | 1733 | fail: |
| 1734 | dev_kfree_skb(skb); |
| 1735 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1736 | } |
| 1737 | |
| 1738 | /** |
| 1739 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type |
| 1740 | * subinterfaces (wlan#, WDS, and VLAN interfaces) |
| 1741 | * @skb: packet to be sent |
| 1742 | * @dev: incoming interface |
| 1743 | * |
| 1744 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will |
| 1745 | * not be freed, and caller is responsible for either retrying later or freeing |
| 1746 | * skb). |
| 1747 | * |
| 1748 | * This function takes in an Ethernet header and encapsulates it with suitable |
| 1749 | * IEEE 802.11 header based on which interface the packet is coming in. The |
| 1750 | * encapsulated packet will then be passed to master interface, wlan#.11, for |
| 1751 | * transmission (through low-level driver). |
| 1752 | */ |
Stephen Hemminger | d0cf9c0 | 2009-08-31 19:50:57 +0000 | [diff] [blame] | 1753 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
| 1754 | struct net_device *dev) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1755 | { |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 1756 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1757 | struct ieee80211_local *local = sdata->local; |
Felix Fietkau | 489ee91 | 2010-12-18 19:30:48 +0100 | [diff] [blame] | 1758 | struct ieee80211_tx_info *info; |
Johannes Berg | dcf3396 | 2012-07-30 15:11:56 +0200 | [diff] [blame] | 1759 | int head_need; |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 1760 | u16 ethertype, hdrlen, meshhdrlen = 0; |
| 1761 | __le16 fc; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1762 | struct ieee80211_hdr hdr; |
Wey-Yi Guy | ff67bb8 | 2010-08-21 07:23:29 -0700 | [diff] [blame] | 1763 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
Chun-Yeow Yeoh | b8bacc1 | 2012-05-30 09:30:41 +0800 | [diff] [blame] | 1764 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1765 | const u8 *encaps_data; |
| 1766 | int encaps_len, skip_header_bytes; |
Jiri Slaby | e8bf964 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 1767 | int nh_pos, h_pos; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1768 | struct sta_info *sta = NULL; |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1769 | bool wme_sta = false, authorized = false, tdls_auth = false; |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1770 | bool tdls_direct = false; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 1771 | bool multicast; |
| 1772 | u32 info_flags = 0; |
| 1773 | u16 info_id = 0; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1774 | struct ieee80211_chanctx_conf *chanctx_conf; |
| 1775 | struct ieee80211_sub_if_data *ap_sdata; |
| 1776 | enum ieee80211_band band; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1777 | |
Johannes Berg | dcf3396 | 2012-07-30 15:11:56 +0200 | [diff] [blame] | 1778 | if (unlikely(skb->len < ETH_HLEN)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1779 | goto fail; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1780 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1781 | /* convert Ethernet header to proper 802.11 header (based on |
| 1782 | * operation mode) */ |
| 1783 | ethertype = (skb->data[12] << 8) | skb->data[13]; |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 1784 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1785 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1786 | rcu_read_lock(); |
| 1787 | |
Johannes Berg | 51fb61e | 2007-12-19 01:31:27 +0100 | [diff] [blame] | 1788 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1789 | case NL80211_IFTYPE_AP_VLAN: |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1790 | sta = rcu_dereference(sdata->u.vlan.sta); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1791 | if (sta) { |
| 1792 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
| 1793 | /* RA TA DA SA */ |
| 1794 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1795 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1796 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 1797 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); |
| 1798 | hdrlen = 30; |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1799 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
| 1800 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1801 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1802 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
| 1803 | u.ap); |
| 1804 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); |
| 1805 | if (!chanctx_conf) |
| 1806 | goto fail_rcu; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1807 | band = chanctx_conf->def.chan->band; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1808 | if (sta) |
| 1809 | break; |
| 1810 | /* fall through */ |
| 1811 | case NL80211_IFTYPE_AP: |
Arnd Bergmann | fe80123 | 2013-01-25 14:14:33 +0000 | [diff] [blame] | 1812 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
| 1813 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 1814 | if (!chanctx_conf) |
| 1815 | goto fail_rcu; |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 1816 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1817 | /* DA BSSID SA */ |
| 1818 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1819 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1820 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
| 1821 | hdrlen = 24; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1822 | band = chanctx_conf->def.chan->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 1823 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1824 | case NL80211_IFTYPE_WDS: |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 1825 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1826 | /* RA TA DA SA */ |
| 1827 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1828 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1829 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 1830 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); |
| 1831 | hdrlen = 30; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1832 | /* |
| 1833 | * This is the exception! WDS style interfaces are prohibited |
| 1834 | * when channel contexts are in used so this must be valid |
| 1835 | */ |
| 1836 | band = local->hw.conf.channel->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 1837 | break; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1838 | #ifdef CONFIG_MAC80211_MESH |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1839 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 1840 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 1841 | /* Do not send frames with mesh_ttl == 0 */ |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 1842 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1843 | goto fail_rcu; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1844 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1845 | |
Chun-Yeow Yeoh | b8bacc1 | 2012-05-30 09:30:41 +0800 | [diff] [blame] | 1846 | if (!is_multicast_ether_addr(skb->data)) { |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 1847 | mpath = mesh_path_lookup(sdata, skb->data); |
Chun-Yeow Yeoh | b8bacc1 | 2012-05-30 09:30:41 +0800 | [diff] [blame] | 1848 | if (!mpath) |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 1849 | mppath = mpp_path_lookup(sdata, skb->data); |
Chun-Yeow Yeoh | b8bacc1 | 2012-05-30 09:30:41 +0800 | [diff] [blame] | 1850 | } |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 1851 | |
Joel A Fernandes | f76b57b | 2010-12-28 19:28:11 -0600 | [diff] [blame] | 1852 | /* |
Joel A Fernandes | 9d52501 | 2011-01-10 00:44:23 -0600 | [diff] [blame] | 1853 | * Use address extension if it is a packet from |
| 1854 | * another interface or if we know the destination |
| 1855 | * is being proxied by a portal (i.e. portal address |
| 1856 | * differs from proxied address) |
Joel A Fernandes | f76b57b | 2010-12-28 19:28:11 -0600 | [diff] [blame] | 1857 | */ |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1858 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
| 1859 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 1860 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
| 1861 | skb->data, skb->data + ETH_ALEN); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 1862 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
| 1863 | NULL, NULL); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 1864 | } else { |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 1865 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
| 1866 | * For unicast with unknown forwarding information, |
| 1867 | * destination might be in the MBSS or if that fails |
| 1868 | * forwarded to another mesh gate. In either case |
| 1869 | * resolution will be handled in ieee80211_xmit(), so |
| 1870 | * leave the original DA. This also works for mcast */ |
| 1871 | const u8 *mesh_da = skb->data; |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 1872 | |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 1873 | if (mppath) |
| 1874 | mesh_da = mppath->mpp; |
| 1875 | else if (mpath) |
| 1876 | mesh_da = mpath->dst; |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 1877 | |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 1878 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1879 | mesh_da, sdata->vif.addr); |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 1880 | if (is_multicast_ether_addr(mesh_da)) |
| 1881 | /* DA TA mSA AE:SA */ |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 1882 | meshhdrlen = ieee80211_new_mesh_header( |
| 1883 | sdata, &mesh_hdr, |
| 1884 | skb->data + ETH_ALEN, NULL); |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 1885 | else |
Thomas Pedersen | 27f0112 | 2012-08-20 11:28:25 -0700 | [diff] [blame] | 1886 | /* RA TA mDA mSA AE:DA SA */ |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 1887 | meshhdrlen = ieee80211_new_mesh_header( |
| 1888 | sdata, &mesh_hdr, skb->data, |
| 1889 | skb->data + ETH_ALEN); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 1890 | |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 1891 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1892 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 1893 | if (!chanctx_conf) |
| 1894 | goto fail_rcu; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1895 | band = chanctx_conf->def.chan->band; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1896 | break; |
| 1897 | #endif |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1898 | case NL80211_IFTYPE_STATION: |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1899 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1900 | bool tdls_peer = false; |
| 1901 | |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1902 | sta = sta_info_get(sdata, skb->data); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1903 | if (sta) { |
| 1904 | authorized = test_sta_flag(sta, |
| 1905 | WLAN_STA_AUTHORIZED); |
| 1906 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); |
| 1907 | tdls_peer = test_sta_flag(sta, |
| 1908 | WLAN_STA_TDLS_PEER); |
| 1909 | tdls_auth = test_sta_flag(sta, |
| 1910 | WLAN_STA_TDLS_PEER_AUTH); |
| 1911 | } |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1912 | |
| 1913 | /* |
| 1914 | * If the TDLS link is enabled, send everything |
| 1915 | * directly. Otherwise, allow TDLS setup frames |
| 1916 | * to be transmitted indirectly. |
| 1917 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1918 | tdls_direct = tdls_peer && (tdls_auth || |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1919 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
| 1920 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); |
| 1921 | } |
| 1922 | |
| 1923 | if (tdls_direct) { |
| 1924 | /* link during setup - throw out frames to peer */ |
Johannes Berg | dcf3396 | 2012-07-30 15:11:56 +0200 | [diff] [blame] | 1925 | if (!tdls_auth) |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1926 | goto fail_rcu; |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1927 | |
| 1928 | /* DA SA BSSID */ |
| 1929 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| 1930 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| 1931 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); |
| 1932 | hdrlen = 24; |
| 1933 | } else if (sdata->u.mgd.use_4addr && |
| 1934 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { |
| 1935 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | |
| 1936 | IEEE80211_FCTL_TODS); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1937 | /* RA TA DA SA */ |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1938 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1939 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1940 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 1941 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); |
| 1942 | hdrlen = 30; |
| 1943 | } else { |
| 1944 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
| 1945 | /* BSSID SA DA */ |
Arik Nemtsov | 941c93c | 2011-09-28 14:12:54 +0300 | [diff] [blame] | 1946 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1947 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| 1948 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 1949 | hdrlen = 24; |
| 1950 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1951 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 1952 | if (!chanctx_conf) |
| 1953 | goto fail_rcu; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1954 | band = chanctx_conf->def.chan->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 1955 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1956 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1957 | /* DA SA BSSID */ |
| 1958 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| 1959 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1960 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1961 | hdrlen = 24; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1962 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 1963 | if (!chanctx_conf) |
| 1964 | goto fail_rcu; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1965 | band = chanctx_conf->def.chan->band; |
Johannes Berg | cf96683 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 1966 | break; |
| 1967 | default: |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1968 | goto fail_rcu; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1969 | } |
| 1970 | |
Johannes Berg | 7d185b8 | 2008-01-28 17:11:43 +0100 | [diff] [blame] | 1971 | /* |
| 1972 | * There's no need to try to look up the destination |
| 1973 | * if it is a multicast address (which can only happen |
| 1974 | * in AP mode) |
| 1975 | */ |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 1976 | multicast = is_multicast_ether_addr(hdr.addr1); |
| 1977 | if (!multicast) { |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 1978 | sta = sta_info_get(sdata, hdr.addr1); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1979 | if (sta) { |
| 1980 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
| 1981 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); |
| 1982 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1983 | } |
| 1984 | |
Javier Cardona | 4777be4 | 2011-09-07 17:49:52 -0700 | [diff] [blame] | 1985 | /* For mesh, the use of the QoS header is mandatory */ |
| 1986 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1987 | wme_sta = true; |
Javier Cardona | 4777be4 | 2011-09-07 17:49:52 -0700 | [diff] [blame] | 1988 | |
Johannes Berg | 3434fbd | 2008-05-03 00:59:37 +0200 | [diff] [blame] | 1989 | /* receiver and we are QoS enabled, use a QoS type frame */ |
Johannes Berg | 32c5057 | 2012-03-28 11:04:29 +0200 | [diff] [blame] | 1990 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 1991 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1992 | hdrlen += 2; |
| 1993 | } |
| 1994 | |
| 1995 | /* |
Johannes Berg | 238814f | 2008-01-28 17:19:37 +0100 | [diff] [blame] | 1996 | * Drop unicast frames to unauthorised stations unless they are |
| 1997 | * EAPOL frames from the local station. |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1998 | */ |
Johannes Berg | 55182e4 | 2011-10-12 17:28:21 +0200 | [diff] [blame] | 1999 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
| 2000 | !is_multicast_ether_addr(hdr.addr1) && !authorized && |
| 2001 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2002 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2003 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 2004 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2005 | dev->name, hdr.addr1); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2006 | #endif |
| 2007 | |
| 2008 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); |
| 2009 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2010 | goto fail_rcu; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2011 | } |
| 2012 | |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2013 | if (unlikely(!multicast && skb->sk && |
| 2014 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { |
| 2015 | struct sk_buff *orig_skb = skb; |
| 2016 | |
| 2017 | skb = skb_clone(skb, GFP_ATOMIC); |
| 2018 | if (skb) { |
| 2019 | unsigned long flags; |
Tejun Heo | 9475af6 | 2013-02-27 17:04:59 -0800 | [diff] [blame] | 2020 | int id; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2021 | |
| 2022 | spin_lock_irqsave(&local->ack_status_lock, flags); |
Tejun Heo | 9475af6 | 2013-02-27 17:04:59 -0800 | [diff] [blame] | 2023 | id = idr_alloc(&local->ack_status_frames, orig_skb, |
| 2024 | 1, 0x10000, GFP_ATOMIC); |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2025 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
| 2026 | |
Tejun Heo | 9475af6 | 2013-02-27 17:04:59 -0800 | [diff] [blame] | 2027 | if (id >= 0) { |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2028 | info_id = id; |
| 2029 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
| 2030 | } else if (skb_shared(skb)) { |
| 2031 | kfree_skb(orig_skb); |
| 2032 | } else { |
| 2033 | kfree_skb(skb); |
| 2034 | skb = orig_skb; |
| 2035 | } |
| 2036 | } else { |
| 2037 | /* couldn't clone -- lose tx status ... */ |
| 2038 | skb = orig_skb; |
| 2039 | } |
| 2040 | } |
| 2041 | |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2042 | /* |
| 2043 | * If the skb is shared we need to obtain our own copy. |
| 2044 | */ |
| 2045 | if (skb_shared(skb)) { |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2046 | struct sk_buff *tmp_skb = skb; |
| 2047 | |
| 2048 | /* can't happen -- skb is a clone if info_id != 0 */ |
| 2049 | WARN_ON(info_id); |
| 2050 | |
Felix Fietkau | f8a0a78 | 2010-12-18 19:30:50 +0100 | [diff] [blame] | 2051 | skb = skb_clone(skb, GFP_ATOMIC); |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2052 | kfree_skb(tmp_skb); |
| 2053 | |
Johannes Berg | dcf3396 | 2012-07-30 15:11:56 +0200 | [diff] [blame] | 2054 | if (!skb) |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2055 | goto fail_rcu; |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2056 | } |
| 2057 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2058 | hdr.frame_control = fc; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2059 | hdr.duration_id = 0; |
| 2060 | hdr.seq_ctrl = 0; |
| 2061 | |
| 2062 | skip_header_bytes = ETH_HLEN; |
| 2063 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { |
| 2064 | encaps_data = bridge_tunnel_header; |
| 2065 | encaps_len = sizeof(bridge_tunnel_header); |
| 2066 | skip_header_bytes -= 2; |
| 2067 | } else if (ethertype >= 0x600) { |
| 2068 | encaps_data = rfc1042_header; |
| 2069 | encaps_len = sizeof(rfc1042_header); |
| 2070 | skip_header_bytes -= 2; |
| 2071 | } else { |
| 2072 | encaps_data = NULL; |
| 2073 | encaps_len = 0; |
| 2074 | } |
| 2075 | |
Helmut Schaa | 7e24470 | 2010-12-02 18:44:09 +0100 | [diff] [blame] | 2076 | nh_pos = skb_network_header(skb) - skb->data; |
| 2077 | h_pos = skb_transport_header(skb) - skb->data; |
| 2078 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2079 | skb_pull(skb, skip_header_bytes); |
| 2080 | nh_pos -= skip_header_bytes; |
| 2081 | h_pos -= skip_header_bytes; |
| 2082 | |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 2083 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2084 | |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 2085 | /* |
| 2086 | * So we need to modify the skb header and hence need a copy of |
| 2087 | * that. The head_need variable above doesn't, so far, include |
| 2088 | * the needed header space that we don't need right away. If we |
| 2089 | * can, then we don't reallocate right now but only after the |
| 2090 | * frame arrives at the master device (if it does...) |
| 2091 | * |
| 2092 | * If we cannot, however, then we will reallocate to include all |
| 2093 | * the ever needed space. Also, if we need to reallocate it anyway, |
| 2094 | * make it big enough for everything we may ever need. |
| 2095 | */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2096 | |
David S. Miller | 3a5be7d | 2008-06-18 01:19:51 -0700 | [diff] [blame] | 2097 | if (head_need > 0 || skb_cloned(skb)) { |
Johannes Berg | 23c0752 | 2008-05-29 10:38:53 +0200 | [diff] [blame] | 2098 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
| 2099 | head_need += local->tx_headroom; |
| 2100 | head_need = max_t(int, 0, head_need); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 2101 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
| 2102 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | 1c963be | 2012-11-07 14:02:30 +0100 | [diff] [blame] | 2103 | skb = NULL; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2104 | goto fail_rcu; |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 2105 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2106 | } |
| 2107 | |
| 2108 | if (encaps_data) { |
| 2109 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
| 2110 | nh_pos += encaps_len; |
| 2111 | h_pos += encaps_len; |
| 2112 | } |
Johannes Berg | c29b9b9 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 2113 | |
Yuri Ershov | e4ab7eb | 2010-06-29 15:08:06 +0400 | [diff] [blame] | 2114 | #ifdef CONFIG_MAC80211_MESH |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 2115 | if (meshhdrlen > 0) { |
| 2116 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); |
| 2117 | nh_pos += meshhdrlen; |
| 2118 | h_pos += meshhdrlen; |
| 2119 | } |
Yuri Ershov | e4ab7eb | 2010-06-29 15:08:06 +0400 | [diff] [blame] | 2120 | #endif |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 2121 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2122 | if (ieee80211_is_data_qos(fc)) { |
Johannes Berg | c29b9b9 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 2123 | __le16 *qos_control; |
| 2124 | |
| 2125 | qos_control = (__le16*) skb_push(skb, 2); |
| 2126 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
| 2127 | /* |
| 2128 | * Maybe we could actually set some fields here, for now just |
| 2129 | * initialise to zero to indicate no special operation. |
| 2130 | */ |
| 2131 | *qos_control = 0; |
| 2132 | } else |
| 2133 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); |
| 2134 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2135 | nh_pos += hdrlen; |
| 2136 | h_pos += hdrlen; |
| 2137 | |
Stephen Hemminger | 68aae11 | 2007-08-24 11:29:34 -0700 | [diff] [blame] | 2138 | dev->stats.tx_packets++; |
| 2139 | dev->stats.tx_bytes += skb->len; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2140 | |
| 2141 | /* Update skb pointers to various headers since this modified frame |
| 2142 | * is going to go through Linux networking code that may potentially |
| 2143 | * need things like pointer to IP header. */ |
| 2144 | skb_set_mac_header(skb, 0); |
| 2145 | skb_set_network_header(skb, nh_pos); |
| 2146 | skb_set_transport_header(skb, h_pos); |
| 2147 | |
Felix Fietkau | 489ee91 | 2010-12-18 19:30:48 +0100 | [diff] [blame] | 2148 | info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2149 | memset(info, 0, sizeof(*info)); |
| 2150 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2151 | dev->trans_start = jiffies; |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 2152 | |
| 2153 | info->flags = info_flags; |
| 2154 | info->ack_frame_id = info_id; |
| 2155 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2156 | ieee80211_xmit(sdata, skb, band); |
| 2157 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2158 | |
Patrick McHardy | ec634fe | 2009-07-05 19:23:38 -0700 | [diff] [blame] | 2159 | return NETDEV_TX_OK; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2160 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2161 | fail_rcu: |
| 2162 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2163 | fail: |
Johannes Berg | dcf3396 | 2012-07-30 15:11:56 +0200 | [diff] [blame] | 2164 | dev_kfree_skb(skb); |
| 2165 | return NETDEV_TX_OK; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2166 | } |
| 2167 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2168 | |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 2169 | /* |
| 2170 | * ieee80211_clear_tx_pending may not be called in a context where |
| 2171 | * it is possible that it packets could come in again. |
| 2172 | */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2173 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
| 2174 | { |
Felix Fietkau | 1f98ab7 | 2012-11-10 03:44:14 +0100 | [diff] [blame] | 2175 | struct sk_buff *skb; |
Johannes Berg | 2de8e0d | 2009-03-23 17:28:35 +0100 | [diff] [blame] | 2176 | int i; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2177 | |
Felix Fietkau | 1f98ab7 | 2012-11-10 03:44:14 +0100 | [diff] [blame] | 2178 | for (i = 0; i < local->hw.queues; i++) { |
| 2179 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) |
| 2180 | ieee80211_free_txskb(&local->hw, skb); |
| 2181 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2182 | } |
| 2183 | |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 2184 | /* |
| 2185 | * Returns false if the frame couldn't be transmitted but was queued instead, |
| 2186 | * which in this case means re-queued -- take as an indication to stop sending |
| 2187 | * more pending frames. |
| 2188 | */ |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2189 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
| 2190 | struct sk_buff *skb) |
| 2191 | { |
| 2192 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 2193 | struct ieee80211_sub_if_data *sdata; |
| 2194 | struct sta_info *sta; |
| 2195 | struct ieee80211_hdr *hdr; |
Johannes Berg | 7bb4568 | 2011-02-24 14:42:06 +0100 | [diff] [blame] | 2196 | bool result; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2197 | struct ieee80211_chanctx_conf *chanctx_conf; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2198 | |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 2199 | sdata = vif_to_sdata(info->control.vif); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2200 | |
| 2201 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2202 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 2203 | if (unlikely(!chanctx_conf)) { |
| 2204 | dev_kfree_skb(skb); |
| 2205 | return true; |
| 2206 | } |
| 2207 | result = ieee80211_tx(sdata, skb, true, |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2208 | chanctx_conf->def.chan->band); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2209 | } else { |
Johannes Berg | 252b86c | 2011-11-16 15:28:55 +0100 | [diff] [blame] | 2210 | struct sk_buff_head skbs; |
| 2211 | |
| 2212 | __skb_queue_head_init(&skbs); |
| 2213 | __skb_queue_tail(&skbs, skb); |
| 2214 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2215 | hdr = (struct ieee80211_hdr *)skb->data; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 2216 | sta = sta_info_get(sdata, hdr->addr1); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2217 | |
Johannes Berg | 74e4dbf | 2011-11-16 15:28:57 +0100 | [diff] [blame] | 2218 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2219 | } |
| 2220 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2221 | return result; |
| 2222 | } |
| 2223 | |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 2224 | /* |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2225 | * Transmit all pending packets. Called from tasklet. |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 2226 | */ |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2227 | void ieee80211_tx_pending(unsigned long data) |
| 2228 | { |
| 2229 | struct ieee80211_local *local = (struct ieee80211_local *)data; |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2230 | unsigned long flags; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 2231 | int i; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2232 | bool txok; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2233 | |
Johannes Berg | f0e7285 | 2009-03-23 17:28:36 +0100 | [diff] [blame] | 2234 | rcu_read_lock(); |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2235 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2236 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
Johannes Berg | 176be72 | 2009-03-12 23:49:28 +0100 | [diff] [blame] | 2237 | for (i = 0; i < local->hw.queues; i++) { |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2238 | /* |
| 2239 | * If queue is stopped by something other than due to pending |
| 2240 | * frames, or we have no pending frames, proceed to next queue. |
| 2241 | */ |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2242 | if (local->queue_stop_reasons[i] || |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2243 | skb_queue_empty(&local->pending[i])) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2244 | continue; |
Johannes Berg | e253008 | 2008-05-17 00:57:14 +0200 | [diff] [blame] | 2245 | |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2246 | while (!skb_queue_empty(&local->pending[i])) { |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2247 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 2248 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 5061b0c | 2009-07-14 00:33:34 +0200 | [diff] [blame] | 2249 | |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 2250 | if (WARN_ON(!info->control.vif)) { |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 2251 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | a7bc376 | 2009-07-27 10:33:31 +0200 | [diff] [blame] | 2252 | continue; |
| 2253 | } |
| 2254 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2255 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
| 2256 | flags); |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2257 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2258 | txok = ieee80211_tx_pending_skb(local, skb); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2259 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
| 2260 | flags); |
| 2261 | if (!txok) |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2262 | break; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2263 | } |
Johannes Berg | 7236fe2 | 2010-03-22 13:42:43 -0700 | [diff] [blame] | 2264 | |
| 2265 | if (skb_queue_empty(&local->pending[i])) |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 2266 | ieee80211_propagate_queue_wake(local, i); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2267 | } |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2268 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
Johannes Berg | 2a577d9 | 2009-03-23 17:28:37 +0100 | [diff] [blame] | 2269 | |
Johannes Berg | f0e7285 | 2009-03-23 17:28:36 +0100 | [diff] [blame] | 2270 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2271 | } |
| 2272 | |
| 2273 | /* functions for drivers to get certain frames */ |
| 2274 | |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 2275 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
| 2276 | struct ps_data *ps, struct sk_buff *skb) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2277 | { |
| 2278 | u8 *pos, *tim; |
| 2279 | int aid0 = 0; |
| 2280 | int i, have_bits = 0, n1, n2; |
| 2281 | |
| 2282 | /* Generate bitmap for TIM only if there are any STAs in power save |
| 2283 | * mode. */ |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2284 | if (atomic_read(&ps->num_sta_ps) > 0) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2285 | /* in the hope that this is faster than |
| 2286 | * checking byte-for-byte */ |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2287 | have_bits = !bitmap_empty((unsigned long*)ps->tim, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2288 | IEEE80211_MAX_AID+1); |
| 2289 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2290 | if (ps->dtim_count == 0) |
| 2291 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2292 | else |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2293 | ps->dtim_count--; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2294 | |
| 2295 | tim = pos = (u8 *) skb_put(skb, 6); |
| 2296 | *pos++ = WLAN_EID_TIM; |
| 2297 | *pos++ = 4; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2298 | *pos++ = ps->dtim_count; |
Johannes Berg | 8860020 | 2012-02-13 15:17:18 +0100 | [diff] [blame] | 2299 | *pos++ = sdata->vif.bss_conf.dtim_period; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2300 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2301 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2302 | aid0 = 1; |
| 2303 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2304 | ps->dtim_bc_mc = aid0 == 1; |
Christian Lamparter | 512119b | 2011-01-31 20:48:44 +0200 | [diff] [blame] | 2305 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2306 | if (have_bits) { |
| 2307 | /* Find largest even number N1 so that bits numbered 1 through |
| 2308 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits |
| 2309 | * (N2 + 1) x 8 through 2007 are 0. */ |
| 2310 | n1 = 0; |
| 2311 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2312 | if (ps->tim[i]) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2313 | n1 = i & 0xfe; |
| 2314 | break; |
| 2315 | } |
| 2316 | } |
| 2317 | n2 = n1; |
| 2318 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2319 | if (ps->tim[i]) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2320 | n2 = i; |
| 2321 | break; |
| 2322 | } |
| 2323 | } |
| 2324 | |
| 2325 | /* Bitmap control */ |
| 2326 | *pos++ = n1 | aid0; |
| 2327 | /* Part Virt Bitmap */ |
Eliad Peller | 5220da3 | 2011-11-24 16:50:00 +0200 | [diff] [blame] | 2328 | skb_put(skb, n2 - n1); |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2329 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2330 | |
| 2331 | tim[1] = n2 - n1 + 4; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2332 | } else { |
| 2333 | *pos++ = aid0; /* Bitmap control */ |
| 2334 | *pos++ = 0; /* Part Virt Bitmap */ |
| 2335 | } |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2336 | } |
| 2337 | |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 2338 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
| 2339 | struct ps_data *ps, struct sk_buff *skb) |
| 2340 | { |
| 2341 | struct ieee80211_local *local = sdata->local; |
| 2342 | |
| 2343 | /* |
| 2344 | * Not very nice, but we want to allow the driver to call |
| 2345 | * ieee80211_beacon_get() as a response to the set_tim() |
| 2346 | * callback. That, however, is already invoked under the |
| 2347 | * sta_lock to guarantee consistent and race-free update |
| 2348 | * of the tim bitmap in mac80211 and the driver. |
| 2349 | */ |
| 2350 | if (local->tim_in_locked_section) { |
| 2351 | __ieee80211_beacon_add_tim(sdata, ps, skb); |
| 2352 | } else { |
Johannes Berg | 65f704a | 2013-02-13 17:39:53 +0100 | [diff] [blame] | 2353 | spin_lock(&local->tim_lock); |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 2354 | __ieee80211_beacon_add_tim(sdata, ps, skb); |
Johannes Berg | 65f704a | 2013-02-13 17:39:53 +0100 | [diff] [blame] | 2355 | spin_unlock(&local->tim_lock); |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 2356 | } |
| 2357 | |
| 2358 | return 0; |
| 2359 | } |
| 2360 | |
Johannes Berg | eddcbb9 | 2009-10-29 08:30:35 +0100 | [diff] [blame] | 2361 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
| 2362 | struct ieee80211_vif *vif, |
| 2363 | u16 *tim_offset, u16 *tim_length) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2364 | { |
| 2365 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 2366 | struct sk_buff *skb = NULL; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2367 | struct ieee80211_tx_info *info; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2368 | struct ieee80211_sub_if_data *sdata = NULL; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2369 | enum ieee80211_band band; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 2370 | struct ieee80211_tx_rate_control txrc; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2371 | struct ieee80211_chanctx_conf *chanctx_conf; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 2372 | |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2373 | rcu_read_lock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2374 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 2375 | sdata = vif_to_sdata(vif); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2376 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2377 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2378 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
Felix Fietkau | eb3e554 | 2011-01-24 19:28:49 +0100 | [diff] [blame] | 2379 | goto out; |
| 2380 | |
Johannes Berg | eddcbb9 | 2009-10-29 08:30:35 +0100 | [diff] [blame] | 2381 | if (tim_offset) |
| 2382 | *tim_offset = 0; |
| 2383 | if (tim_length) |
| 2384 | *tim_length = 0; |
| 2385 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2386 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2387 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
| 2388 | struct beacon_data *beacon = rcu_dereference(ap->beacon); |
| 2389 | |
Dan Carpenter | 3ad97fb | 2011-02-07 22:03:35 +0300 | [diff] [blame] | 2390 | if (beacon) { |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 2391 | /* |
| 2392 | * headroom, head length, |
| 2393 | * tail length and maximum TIM length |
| 2394 | */ |
| 2395 | skb = dev_alloc_skb(local->tx_headroom + |
| 2396 | beacon->head_len + |
| 2397 | beacon->tail_len + 256); |
| 2398 | if (!skb) |
| 2399 | goto out; |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2400 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 2401 | skb_reserve(skb, local->tx_headroom); |
| 2402 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
| 2403 | beacon->head_len); |
| 2404 | |
Marco Porsch | eac70c1 | 2013-01-07 16:04:50 +0100 | [diff] [blame] | 2405 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 2406 | |
Johannes Berg | eddcbb9 | 2009-10-29 08:30:35 +0100 | [diff] [blame] | 2407 | if (tim_offset) |
| 2408 | *tim_offset = beacon->head_len; |
| 2409 | if (tim_length) |
| 2410 | *tim_length = skb->len - beacon->head_len; |
| 2411 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 2412 | if (beacon->tail) |
| 2413 | memcpy(skb_put(skb, beacon->tail_len), |
| 2414 | beacon->tail, beacon->tail_len); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 2415 | } else |
| 2416 | goto out; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2417 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2418 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 2419 | struct ieee80211_hdr *hdr; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 2420 | struct sk_buff *presp = rcu_dereference(ifibss->presp); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 2421 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 2422 | if (!presp) |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 2423 | goto out; |
| 2424 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 2425 | skb = skb_copy(presp, GFP_ATOMIC); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 2426 | if (!skb) |
| 2427 | goto out; |
| 2428 | |
| 2429 | hdr = (struct ieee80211_hdr *) skb->data; |
Harvey Harrison | e7827a7 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2430 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 2431 | IEEE80211_STYPE_BEACON); |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 2432 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 2433 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Thomas Pedersen | 2b5e196 | 2013-02-14 11:20:13 -0800 | [diff] [blame] | 2434 | struct beacon_data *bcn = rcu_dereference(ifmsh->beacon); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 2435 | |
Thomas Pedersen | 2b5e196 | 2013-02-14 11:20:13 -0800 | [diff] [blame] | 2436 | if (!bcn) |
Johannes Berg | ac1bd84 | 2011-01-18 13:45:32 +0100 | [diff] [blame] | 2437 | goto out; |
Johannes Berg | ac1bd84 | 2011-01-18 13:45:32 +0100 | [diff] [blame] | 2438 | |
Javier Cardona | dbf498f | 2012-03-31 11:31:32 -0700 | [diff] [blame] | 2439 | if (ifmsh->sync_ops) |
| 2440 | ifmsh->sync_ops->adjust_tbtt( |
| 2441 | sdata); |
| 2442 | |
Thomas Pedersen | 3b69a9c | 2011-10-26 14:47:25 -0700 | [diff] [blame] | 2443 | skb = dev_alloc_skb(local->tx_headroom + |
Thomas Pedersen | 2b5e196 | 2013-02-14 11:20:13 -0800 | [diff] [blame] | 2444 | bcn->head_len + |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2445 | 256 + /* TIM IE */ |
Thomas Pedersen | 2b5e196 | 2013-02-14 11:20:13 -0800 | [diff] [blame] | 2446 | bcn->tail_len); |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 2447 | if (!skb) |
| 2448 | goto out; |
Thomas Pedersen | 2b5e196 | 2013-02-14 11:20:13 -0800 | [diff] [blame] | 2449 | skb_reserve(skb, local->tx_headroom); |
| 2450 | memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len); |
| 2451 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb); |
| 2452 | memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len); |
Johannes Berg | 9d139c8 | 2008-07-09 14:40:37 +0200 | [diff] [blame] | 2453 | } else { |
| 2454 | WARN_ON(1); |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2455 | goto out; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2456 | } |
| 2457 | |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2458 | band = chanctx_conf->def.chan->band; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2459 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2460 | info = IEEE80211_SKB_CB(skb); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2461 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2462 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 2463 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2464 | info->band = band; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 2465 | |
| 2466 | memset(&txrc, 0, sizeof(txrc)); |
| 2467 | txrc.hw = hw; |
Johannes Berg | e31583c | 2012-07-26 14:07:46 +0200 | [diff] [blame] | 2468 | txrc.sband = local->hw.wiphy->bands[band]; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 2469 | txrc.bss_conf = &sdata->vif.bss_conf; |
| 2470 | txrc.skb = skb; |
| 2471 | txrc.reported_rate.idx = -1; |
Jouni Malinen | 37eb0b1 | 2010-01-06 13:09:08 +0200 | [diff] [blame] | 2472 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
Johannes Berg | e31583c | 2012-07-26 14:07:46 +0200 | [diff] [blame] | 2473 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
Jouni Malinen | 37eb0b1 | 2010-01-06 13:09:08 +0200 | [diff] [blame] | 2474 | txrc.max_rate_idx = -1; |
| 2475 | else |
| 2476 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; |
Simon Wunderlich | 1946841 | 2012-01-28 17:25:33 +0100 | [diff] [blame] | 2477 | memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band], |
| 2478 | sizeof(txrc.rate_idx_mcs_mask)); |
Felix Fietkau | 8f0729b | 2010-11-11 15:07:23 +0100 | [diff] [blame] | 2479 | txrc.bss = true; |
Jouni Malinen | e00cfce | 2009-12-29 12:59:19 +0200 | [diff] [blame] | 2480 | rate_control_get_rate(sdata, NULL, &txrc); |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2481 | |
| 2482 | info->control.vif = vif; |
Johannes Berg | f591fa5 | 2008-07-10 11:21:26 +0200 | [diff] [blame] | 2483 | |
John W. Linville | a472e71 | 2010-05-06 14:45:17 -0400 | [diff] [blame] | 2484 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
| 2485 | IEEE80211_TX_CTL_ASSIGN_SEQ | |
| 2486 | IEEE80211_TX_CTL_FIRST_FRAGMENT; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 2487 | out: |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2488 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2489 | return skb; |
| 2490 | } |
Johannes Berg | eddcbb9 | 2009-10-29 08:30:35 +0100 | [diff] [blame] | 2491 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2492 | |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 2493 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
| 2494 | struct ieee80211_vif *vif) |
| 2495 | { |
| 2496 | struct ieee80211_if_ap *ap = NULL; |
Eyal Shapira | aa7a008 | 2012-08-06 14:26:16 +0300 | [diff] [blame] | 2497 | struct sk_buff *skb = NULL; |
| 2498 | struct probe_resp *presp = NULL; |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 2499 | struct ieee80211_hdr *hdr; |
| 2500 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 2501 | |
| 2502 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
| 2503 | return NULL; |
| 2504 | |
| 2505 | rcu_read_lock(); |
| 2506 | |
| 2507 | ap = &sdata->u.ap; |
| 2508 | presp = rcu_dereference(ap->probe_resp); |
| 2509 | if (!presp) |
| 2510 | goto out; |
| 2511 | |
Eyal Shapira | aa7a008 | 2012-08-06 14:26:16 +0300 | [diff] [blame] | 2512 | skb = dev_alloc_skb(presp->len); |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 2513 | if (!skb) |
| 2514 | goto out; |
| 2515 | |
Eyal Shapira | aa7a008 | 2012-08-06 14:26:16 +0300 | [diff] [blame] | 2516 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
| 2517 | |
Arik Nemtsov | 0294582 | 2011-11-10 11:28:57 +0200 | [diff] [blame] | 2518 | hdr = (struct ieee80211_hdr *) skb->data; |
| 2519 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); |
| 2520 | |
| 2521 | out: |
| 2522 | rcu_read_unlock(); |
| 2523 | return skb; |
| 2524 | } |
| 2525 | EXPORT_SYMBOL(ieee80211_proberesp_get); |
| 2526 | |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 2527 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
| 2528 | struct ieee80211_vif *vif) |
| 2529 | { |
| 2530 | struct ieee80211_sub_if_data *sdata; |
| 2531 | struct ieee80211_if_managed *ifmgd; |
| 2532 | struct ieee80211_pspoll *pspoll; |
| 2533 | struct ieee80211_local *local; |
| 2534 | struct sk_buff *skb; |
| 2535 | |
| 2536 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) |
| 2537 | return NULL; |
| 2538 | |
| 2539 | sdata = vif_to_sdata(vif); |
| 2540 | ifmgd = &sdata->u.mgd; |
| 2541 | local = sdata->local; |
| 2542 | |
| 2543 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 2544 | if (!skb) |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 2545 | return NULL; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 2546 | |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 2547 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 2548 | |
| 2549 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); |
| 2550 | memset(pspoll, 0, sizeof(*pspoll)); |
| 2551 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
| 2552 | IEEE80211_STYPE_PSPOLL); |
| 2553 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
| 2554 | |
| 2555 | /* aid in PS-Poll has its two MSBs each set to 1 */ |
| 2556 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); |
| 2557 | |
| 2558 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
| 2559 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); |
| 2560 | |
| 2561 | return skb; |
| 2562 | } |
| 2563 | EXPORT_SYMBOL(ieee80211_pspoll_get); |
| 2564 | |
| 2565 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, |
| 2566 | struct ieee80211_vif *vif) |
| 2567 | { |
| 2568 | struct ieee80211_hdr_3addr *nullfunc; |
| 2569 | struct ieee80211_sub_if_data *sdata; |
| 2570 | struct ieee80211_if_managed *ifmgd; |
| 2571 | struct ieee80211_local *local; |
| 2572 | struct sk_buff *skb; |
| 2573 | |
| 2574 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) |
| 2575 | return NULL; |
| 2576 | |
| 2577 | sdata = vif_to_sdata(vif); |
| 2578 | ifmgd = &sdata->u.mgd; |
| 2579 | local = sdata->local; |
| 2580 | |
| 2581 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 2582 | if (!skb) |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 2583 | return NULL; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 2584 | |
Kalle Valo | 7044cc5 | 2010-01-05 20:16:19 +0200 | [diff] [blame] | 2585 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 2586 | |
| 2587 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, |
| 2588 | sizeof(*nullfunc)); |
| 2589 | memset(nullfunc, 0, sizeof(*nullfunc)); |
| 2590 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | |
| 2591 | IEEE80211_STYPE_NULLFUNC | |
| 2592 | IEEE80211_FCTL_TODS); |
| 2593 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); |
| 2594 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); |
| 2595 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); |
| 2596 | |
| 2597 | return skb; |
| 2598 | } |
| 2599 | EXPORT_SYMBOL(ieee80211_nullfunc_get); |
| 2600 | |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2601 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
| 2602 | struct ieee80211_vif *vif, |
| 2603 | const u8 *ssid, size_t ssid_len, |
Johannes Berg | b9a9ada | 2012-11-29 13:00:10 +0100 | [diff] [blame] | 2604 | size_t tailroom) |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2605 | { |
| 2606 | struct ieee80211_sub_if_data *sdata; |
| 2607 | struct ieee80211_local *local; |
| 2608 | struct ieee80211_hdr_3addr *hdr; |
| 2609 | struct sk_buff *skb; |
| 2610 | size_t ie_ssid_len; |
| 2611 | u8 *pos; |
| 2612 | |
| 2613 | sdata = vif_to_sdata(vif); |
| 2614 | local = sdata->local; |
| 2615 | ie_ssid_len = 2 + ssid_len; |
| 2616 | |
| 2617 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + |
Johannes Berg | b9a9ada | 2012-11-29 13:00:10 +0100 | [diff] [blame] | 2618 | ie_ssid_len + tailroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 2619 | if (!skb) |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2620 | return NULL; |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2621 | |
| 2622 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 2623 | |
| 2624 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); |
| 2625 | memset(hdr, 0, sizeof(*hdr)); |
| 2626 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 2627 | IEEE80211_STYPE_PROBE_REQ); |
Johannes Berg | e83e654 | 2012-07-13 16:23:07 +0200 | [diff] [blame] | 2628 | eth_broadcast_addr(hdr->addr1); |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2629 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); |
Johannes Berg | e83e654 | 2012-07-13 16:23:07 +0200 | [diff] [blame] | 2630 | eth_broadcast_addr(hdr->addr3); |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2631 | |
| 2632 | pos = skb_put(skb, ie_ssid_len); |
| 2633 | *pos++ = WLAN_EID_SSID; |
| 2634 | *pos++ = ssid_len; |
Stanislaw Gruszka | 88c868c | 2012-03-29 16:30:41 +0200 | [diff] [blame] | 2635 | if (ssid_len) |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2636 | memcpy(pos, ssid, ssid_len); |
| 2637 | pos += ssid_len; |
| 2638 | |
Kalle Valo | 05e54ea | 2010-01-05 20:16:38 +0200 | [diff] [blame] | 2639 | return skb; |
| 2640 | } |
| 2641 | EXPORT_SYMBOL(ieee80211_probereq_get); |
| 2642 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 2643 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2644 | const void *frame, size_t frame_len, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2645 | const struct ieee80211_tx_info *frame_txctl, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2646 | struct ieee80211_rts *rts) |
| 2647 | { |
| 2648 | const struct ieee80211_hdr *hdr = frame; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2649 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2650 | rts->frame_control = |
| 2651 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 2652 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
| 2653 | frame_txctl); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2654 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
| 2655 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); |
| 2656 | } |
| 2657 | EXPORT_SYMBOL(ieee80211_rts_get); |
| 2658 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 2659 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2660 | const void *frame, size_t frame_len, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2661 | const struct ieee80211_tx_info *frame_txctl, |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2662 | struct ieee80211_cts *cts) |
| 2663 | { |
| 2664 | const struct ieee80211_hdr *hdr = frame; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2665 | |
Harvey Harrison | 065e9605 | 2008-06-22 16:45:27 -0700 | [diff] [blame] | 2666 | cts->frame_control = |
| 2667 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 2668 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
| 2669 | frame_len, frame_txctl); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2670 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
| 2671 | } |
| 2672 | EXPORT_SYMBOL(ieee80211_ctstoself_get); |
| 2673 | |
| 2674 | struct sk_buff * |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 2675 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2676 | struct ieee80211_vif *vif) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2677 | { |
| 2678 | struct ieee80211_local *local = hw_to_local(hw); |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 2679 | struct sk_buff *skb = NULL; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2680 | struct ieee80211_tx_data tx; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2681 | struct ieee80211_sub_if_data *sdata; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2682 | struct ps_data *ps; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2683 | struct ieee80211_tx_info *info; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2684 | struct ieee80211_chanctx_conf *chanctx_conf; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2685 | |
Johannes Berg | 32bfd35 | 2007-12-19 01:31:26 +0100 | [diff] [blame] | 2686 | sdata = vif_to_sdata(vif); |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2687 | |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2688 | rcu_read_lock(); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2689 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2690 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2691 | if (!chanctx_conf) |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 2692 | goto out; |
Johannes Berg | 5dfdaf5 | 2007-12-19 02:03:33 +0100 | [diff] [blame] | 2693 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2694 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
| 2695 | struct beacon_data *beacon = |
| 2696 | rcu_dereference(sdata->u.ap.beacon); |
| 2697 | |
| 2698 | if (!beacon || !beacon->head) |
| 2699 | goto out; |
| 2700 | |
| 2701 | ps = &sdata->u.ap.ps; |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2702 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
| 2703 | ps = &sdata->u.mesh.ps; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2704 | } else { |
| 2705 | goto out; |
| 2706 | } |
| 2707 | |
| 2708 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 2709 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2710 | |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2711 | while (1) { |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2712 | skb = skb_dequeue(&ps->bc_buf); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2713 | if (!skb) |
Tomas Winkler | 747cf5e | 2008-05-27 17:50:51 +0300 | [diff] [blame] | 2714 | goto out; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2715 | local->total_ps_buffered--; |
| 2716 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 2717 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2718 | struct ieee80211_hdr *hdr = |
| 2719 | (struct ieee80211_hdr *) skb->data; |
| 2720 | /* more buffered multicast/broadcast frames ==> set |
| 2721 | * MoreData flag in IEEE 802.11 header to inform PS |
| 2722 | * STAs */ |
| 2723 | hdr->frame_control |= |
| 2724 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| 2725 | } |
| 2726 | |
Michael Braun | de74a1d | 2013-02-13 16:49:16 +0100 | [diff] [blame] | 2727 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2728 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2729 | break; |
| 2730 | dev_kfree_skb_any(skb); |
| 2731 | } |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 2732 | |
| 2733 | info = IEEE80211_SKB_CB(skb); |
| 2734 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2735 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 2736 | info->band = chanctx_conf->def.chan->band; |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2737 | |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 2738 | if (invoke_tx_handlers(&tx)) |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2739 | skb = NULL; |
Johannes Berg | 97b045d | 2008-06-20 01:22:30 +0200 | [diff] [blame] | 2740 | out: |
Johannes Berg | d0709a6 | 2008-02-25 16:27:46 +0100 | [diff] [blame] | 2741 | rcu_read_unlock(); |
Johannes Berg | e2ebc74 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2742 | |
| 2743 | return skb; |
| 2744 | } |
| 2745 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2746 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2747 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
| 2748 | struct sk_buff *skb, int tid, |
| 2749 | enum ieee80211_band band) |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2750 | { |
Christian Lamparter | 353d09c | 2012-07-07 15:07:13 +0200 | [diff] [blame] | 2751 | int ac = ieee802_1d_to_ac[tid & 7]; |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 2752 | |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2753 | skb_set_mac_header(skb, 0); |
| 2754 | skb_set_network_header(skb, 0); |
| 2755 | skb_set_transport_header(skb, 0); |
| 2756 | |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 2757 | skb_set_queue_mapping(skb, ac); |
Helmut Schaa | cf6bb79 | 2011-12-15 10:18:34 +0100 | [diff] [blame] | 2758 | skb->priority = tid; |
Johannes Berg | cf0277e | 2010-01-05 18:00:58 +0100 | [diff] [blame] | 2759 | |
Johannes Berg | 89afe61 | 2013-02-13 15:39:57 +0100 | [diff] [blame] | 2760 | skb->dev = sdata->dev; |
| 2761 | |
Johannes Berg | 3d34deb | 2009-06-18 17:25:11 +0200 | [diff] [blame] | 2762 | /* |
| 2763 | * The other path calling ieee80211_xmit is from the tasklet, |
| 2764 | * and while we can handle concurrent transmissions locking |
| 2765 | * requirements are that we do not come into tx with bhs on. |
| 2766 | */ |
| 2767 | local_bh_disable(); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 2768 | ieee80211_xmit(sdata, skb, band); |
Johannes Berg | 3d34deb | 2009-06-18 17:25:11 +0200 | [diff] [blame] | 2769 | local_bh_enable(); |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2770 | } |