blob: 619c223f1cded9249db7d3f0b29679fe540b1eeb [file] [log] [blame]
Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Johannes Berg571ecf62007-07-27 15:43:22 +02002/*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
Johannes Berg84040802010-02-15 12:46:39 +02006 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
Johannes Bergd98ad832014-09-03 15:24:57 +03007 * Copyright 2013-2014 Intel Mobile Communications GmbH
Sara Sharonb7540d82017-02-06 15:28:42 +02008 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
Liad Kaufmanc15353b2019-02-06 13:17:13 +02009 * Copyright (C) 2018-2019 Intel Corporation
Johannes Berg571ecf62007-07-27 15:43:22 +020010 */
11
S.Çağlar Onurab466232008-02-14 17:36:47 +020012#include <linux/jiffies.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Johannes Berg571ecf62007-07-27 15:43:22 +020014#include <linux/kernel.h>
15#include <linux/skbuff.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
Johannes Bergd4e46a32007-09-14 11:10:24 -040018#include <linux/rcupdate.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040019#include <linux/export.h>
Sara Sharon06470f72016-01-28 16:19:25 +020020#include <linux/bitops.h>
Johannes Berg571ecf62007-07-27 15:43:22 +020021#include <net/mac80211.h>
22#include <net/ieee80211_radiotap.h>
Johannes Bergd26ad372012-02-20 11:38:41 +010023#include <asm/unaligned.h>
Johannes Berg571ecf62007-07-27 15:43:22 +020024
25#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020026#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040027#include "led.h"
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +010028#include "mesh.h"
Johannes Berg571ecf62007-07-27 15:43:22 +020029#include "wep.h"
30#include "wpa.h"
31#include "tkip.h"
32#include "wme.h"
Johannes Berg1d8d3de2011-12-16 15:28:57 +010033#include "rate.h"
Johannes Berg571ecf62007-07-27 15:43:22 +020034
Johannes Berg5a490512015-04-22 17:10:38 +020035static inline void ieee80211_rx_stats(struct net_device *dev, u32 len)
36{
37 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
38
39 u64_stats_update_begin(&tstats->syncp);
40 tstats->rx_packets++;
41 tstats->rx_bytes += len;
42 u64_stats_update_end(&tstats->syncp);
43}
44
Johannes Berga6828492015-06-16 15:17:15 +020045static u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
46 enum nl80211_iftype type)
47{
48 __le16 fc = hdr->frame_control;
49
50 if (ieee80211_is_data(fc)) {
51 if (len < 24) /* drop incorrect hdr len (data) */
52 return NULL;
53
54 if (ieee80211_has_a4(fc))
55 return NULL;
56 if (ieee80211_has_tods(fc))
57 return hdr->addr1;
58 if (ieee80211_has_fromds(fc))
59 return hdr->addr2;
60
61 return hdr->addr3;
62 }
63
64 if (ieee80211_is_mgmt(fc)) {
65 if (len < 24) /* drop incorrect hdr len (mgmt) */
66 return NULL;
67 return hdr->addr3;
68 }
69
70 if (ieee80211_is_ctl(fc)) {
71 if (ieee80211_is_pspoll(fc))
72 return hdr->addr1;
73
74 if (ieee80211_is_back_req(fc)) {
75 switch (type) {
76 case NL80211_IFTYPE_STATION:
77 return hdr->addr2;
78 case NL80211_IFTYPE_AP:
79 case NL80211_IFTYPE_AP_VLAN:
80 return hdr->addr1;
81 default:
82 break; /* fall through to the return */
83 }
84 }
85 }
86
87 return NULL;
88}
89
Johannes Bergb2e77712007-09-26 15:19:39 +020090/*
91 * monitor mode reception
92 *
93 * This function cleans up the SKB, i.e. it removes all the stuff
94 * only useful for monitoring.
95 */
Johannes Berg30841f52017-04-11 15:38:56 +020096static void remove_monitor_info(struct sk_buff *skb,
97 unsigned int present_fcs_len,
Johannes Bergc096b922018-04-20 13:49:18 +030098 unsigned int rtap_space)
Johannes Bergb2e77712007-09-26 15:19:39 +020099{
Johannes Berg30841f52017-04-11 15:38:56 +0200100 if (present_fcs_len)
101 __pskb_trim(skb, skb->len - present_fcs_len);
Johannes Bergc096b922018-04-20 13:49:18 +0300102 __pskb_pull(skb, rtap_space);
Johannes Bergb2e77712007-09-26 15:19:39 +0200103}
104
Johannes Berg1f7bba72014-11-06 22:56:36 +0100105static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len,
Johannes Bergc096b922018-04-20 13:49:18 +0300106 unsigned int rtap_space)
Johannes Bergb2e77712007-09-26 15:19:39 +0200107{
Johannes Bergf1d58c22009-06-17 13:13:00 +0200108 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
Johannes Berg1f7bba72014-11-06 22:56:36 +0100109 struct ieee80211_hdr *hdr;
110
Johannes Bergc096b922018-04-20 13:49:18 +0300111 hdr = (void *)(skb->data + rtap_space);
Johannes Bergb2e77712007-09-26 15:19:39 +0200112
Johannes Berg4c298672012-07-05 11:34:31 +0200113 if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
Grzegorz Bajorski17883042015-12-11 14:39:46 +0100114 RX_FLAG_FAILED_PLCP_CRC |
Shaul Triebitzc3d1f872018-09-05 08:06:06 +0300115 RX_FLAG_ONLY_MONITOR |
116 RX_FLAG_NO_PSDU))
Zhao, Gang6b59db72014-04-21 12:52:59 +0800117 return true;
118
Johannes Bergc096b922018-04-20 13:49:18 +0300119 if (unlikely(skb->len < 16 + present_fcs_len + rtap_space))
Zhao, Gang6b59db72014-04-21 12:52:59 +0800120 return true;
121
Harvey Harrison87228f52008-06-11 14:21:59 -0700122 if (ieee80211_is_ctl(hdr->frame_control) &&
123 !ieee80211_is_pspoll(hdr->frame_control) &&
124 !ieee80211_is_back_req(hdr->frame_control))
Zhao, Gang6b59db72014-04-21 12:52:59 +0800125 return true;
126
127 return false;
Johannes Bergb2e77712007-09-26 15:19:39 +0200128}
129
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200130static int
Johannes Berg1f7bba72014-11-06 22:56:36 +0100131ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local,
132 struct ieee80211_rx_status *status,
133 struct sk_buff *skb)
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200134{
135 int len;
136
137 /* always present fields */
Johannes Berga144f372013-07-03 13:34:02 +0200138 len = sizeof(struct ieee80211_radiotap_header) + 8;
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200139
Johannes Berga144f372013-07-03 13:34:02 +0200140 /* allocate extra bitmaps */
Johannes Berga144f372013-07-03 13:34:02 +0200141 if (status->chains)
142 len += 4 * hweight8(status->chains);
Johannes Bergefc38dd2018-12-15 11:03:12 +0200143 /* vendor presence bitmap */
144 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)
145 len += 4;
Johannes Berg90b9e4462012-11-16 10:09:08 +0100146
147 if (ieee80211_have_rx_timestamp(status)) {
148 len = ALIGN(len, 8);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200149 len += 8;
Johannes Berg90b9e4462012-11-16 10:09:08 +0100150 }
Johannes Berg30686bf2015-06-02 21:39:54 +0200151 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM))
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200152 len += 1;
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200153
Johannes Berga144f372013-07-03 13:34:02 +0200154 /* antenna field, if we don't have per-chain info */
155 if (!status->chains)
156 len += 1;
157
Johannes Berg90b9e4462012-11-16 10:09:08 +0100158 /* padding for RX_FLAGS if necessary */
159 len = ALIGN(len, 2);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200160
Johannes Bergda6a4352017-04-26 12:14:59 +0200161 if (status->encoding == RX_ENC_HT) /* HT info */
Johannes Berg6d744ba2011-01-27 14:13:17 +0100162 len += 3;
163
Johannes Berg4c298672012-07-05 11:34:31 +0200164 if (status->flag & RX_FLAG_AMPDU_DETAILS) {
Johannes Berg90b9e4462012-11-16 10:09:08 +0100165 len = ALIGN(len, 4);
Johannes Berg4c298672012-07-05 11:34:31 +0200166 len += 8;
167 }
168
Johannes Bergda6a4352017-04-26 12:14:59 +0200169 if (status->encoding == RX_ENC_VHT) {
Johannes Berg51648922012-11-22 23:00:18 +0100170 len = ALIGN(len, 2);
171 len += 12;
172 }
173
Johannes Berg99ee7ca2016-08-29 23:25:17 +0300174 if (local->hw.radiotap_timestamp.units_pos >= 0) {
175 len = ALIGN(len, 8);
176 len += 12;
177 }
178
Luca Coelho41cbb0f2018-06-09 09:14:44 +0300179 if (status->encoding == RX_ENC_HE &&
180 status->flag & RX_FLAG_RADIOTAP_HE) {
181 len = ALIGN(len, 2);
182 len += 12;
183 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he) != 12);
184 }
185
186 if (status->encoding == RX_ENC_HE &&
187 status->flag & RX_FLAG_RADIOTAP_HE_MU) {
188 len = ALIGN(len, 2);
189 len += 12;
190 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) != 12);
191 }
192
Shaul Triebitzc3d1f872018-09-05 08:06:06 +0300193 if (status->flag & RX_FLAG_NO_PSDU)
194 len += 1;
195
Shaul Triebitzd1332e72018-08-31 11:31:20 +0300196 if (status->flag & RX_FLAG_RADIOTAP_LSIG) {
197 len = ALIGN(len, 2);
198 len += 4;
199 BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_lsig) != 4);
200 }
201
Johannes Berga144f372013-07-03 13:34:02 +0200202 if (status->chains) {
203 /* antenna and antenna signal fields */
204 len += 2 * hweight8(status->chains);
205 }
206
Johannes Berg1f7bba72014-11-06 22:56:36 +0100207 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
Liad Kaufmanc15353b2019-02-06 13:17:13 +0200208 struct ieee80211_vendor_radiotap *rtap;
209 int vendor_data_offset = 0;
210
211 /*
212 * The position to look at depends on the existence (or non-
213 * existence) of other elements, so take that into account...
214 */
215 if (status->flag & RX_FLAG_RADIOTAP_HE)
216 vendor_data_offset +=
217 sizeof(struct ieee80211_radiotap_he);
218 if (status->flag & RX_FLAG_RADIOTAP_HE_MU)
219 vendor_data_offset +=
220 sizeof(struct ieee80211_radiotap_he_mu);
221 if (status->flag & RX_FLAG_RADIOTAP_LSIG)
222 vendor_data_offset +=
223 sizeof(struct ieee80211_radiotap_lsig);
224
225 rtap = (void *)&skb->data[vendor_data_offset];
Johannes Berg1f7bba72014-11-06 22:56:36 +0100226
Johannes Berg1f7bba72014-11-06 22:56:36 +0100227 /* alignment for fixed 6-byte vendor data header */
228 len = ALIGN(len, 2);
229 /* vendor data header */
230 len += 6;
231 if (WARN_ON(rtap->align == 0))
232 rtap->align = 1;
233 len = ALIGN(len, rtap->align);
234 len += rtap->len + rtap->pad;
235 }
236
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200237 return len;
238}
239
Johannes Berg9e478062017-04-13 14:23:49 +0200240static void ieee80211_handle_mu_mimo_mon(struct ieee80211_sub_if_data *sdata,
241 struct sk_buff *skb,
Johannes Bergc096b922018-04-20 13:49:18 +0300242 int rtap_space)
Johannes Berg9e478062017-04-13 14:23:49 +0200243{
244 struct {
245 struct ieee80211_hdr_3addr hdr;
246 u8 category;
247 u8 action_code;
Mathieu Malaterre7c53eb52019-01-24 19:19:57 +0100248 } __packed __aligned(2) action;
Johannes Berg9e478062017-04-13 14:23:49 +0200249
250 if (!sdata)
251 return;
252
253 BUILD_BUG_ON(sizeof(action) != IEEE80211_MIN_ACTION_SIZE + 1);
254
Johannes Bergc096b922018-04-20 13:49:18 +0300255 if (skb->len < rtap_space + sizeof(action) +
Johannes Berg9e478062017-04-13 14:23:49 +0200256 VHT_MUMIMO_GROUPS_DATA_LEN)
257 return;
258
259 if (!is_valid_ether_addr(sdata->u.mntr.mu_follow_addr))
260 return;
261
Johannes Bergc096b922018-04-20 13:49:18 +0300262 skb_copy_bits(skb, rtap_space, &action, sizeof(action));
Johannes Berg9e478062017-04-13 14:23:49 +0200263
264 if (!ieee80211_is_action(action.hdr.frame_control))
265 return;
266
267 if (action.category != WLAN_CATEGORY_VHT)
268 return;
269
270 if (action.action_code != WLAN_VHT_ACTION_GROUPID_MGMT)
271 return;
272
273 if (!ether_addr_equal(action.hdr.addr1, sdata->u.mntr.mu_follow_addr))
274 return;
275
276 skb = skb_copy(skb, GFP_ATOMIC);
277 if (!skb)
278 return;
279
Johannes Berg9e478062017-04-13 14:23:49 +0200280 skb_queue_tail(&sdata->skb_queue, skb);
281 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
282}
283
Johannes Berg00ea6de2012-09-05 15:54:51 +0200284/*
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200285 * ieee80211_add_rx_radiotap_header - add radiotap header
286 *
287 * add a radiotap header containing all the fields which the hardware provided.
288 */
289static void
290ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
291 struct sk_buff *skb,
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200292 struct ieee80211_rate *rate,
Felix Fietkau973ef212012-04-16 14:56:48 +0200293 int rtap_len, bool has_fcs)
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200294{
Johannes Bergf1d58c22009-06-17 13:13:00 +0200295 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200296 struct ieee80211_radiotap_header *rthdr;
297 unsigned char *pos;
Johannes Berga144f372013-07-03 13:34:02 +0200298 __le32 *it_present;
299 u32 it_present_val;
Johannes Berg6a86b9c2009-10-28 09:58:52 +0100300 u16 rx_flags = 0;
Simon Wunderlicha5e70692013-07-08 16:55:52 +0200301 u16 channel_flags = 0;
Johannes Berga144f372013-07-03 13:34:02 +0200302 int mpdulen, chain;
303 unsigned long chains = status->chains;
Johannes Berg1f7bba72014-11-06 22:56:36 +0100304 struct ieee80211_vendor_radiotap rtap = {};
Luca Coelho41cbb0f2018-06-09 09:14:44 +0300305 struct ieee80211_radiotap_he he = {};
306 struct ieee80211_radiotap_he_mu he_mu = {};
Shaul Triebitzd1332e72018-08-31 11:31:20 +0300307 struct ieee80211_radiotap_lsig lsig = {};
Luca Coelho41cbb0f2018-06-09 09:14:44 +0300308
309 if (status->flag & RX_FLAG_RADIOTAP_HE) {
310 he = *(struct ieee80211_radiotap_he *)skb->data;
311 skb_pull(skb, sizeof(he));
312 WARN_ON_ONCE(status->encoding != RX_ENC_HE);
313 }
314
315 if (status->flag & RX_FLAG_RADIOTAP_HE_MU) {
316 he_mu = *(struct ieee80211_radiotap_he_mu *)skb->data;
317 skb_pull(skb, sizeof(he_mu));
318 }
Johannes Berg1f7bba72014-11-06 22:56:36 +0100319
Shaul Triebitzd1332e72018-08-31 11:31:20 +0300320 if (status->flag & RX_FLAG_RADIOTAP_LSIG) {
321 lsig = *(struct ieee80211_radiotap_lsig *)skb->data;
322 skb_pull(skb, sizeof(lsig));
323 }
324
Johannes Berg1f7bba72014-11-06 22:56:36 +0100325 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
326 rtap = *(struct ieee80211_vendor_radiotap *)skb->data;
327 /* rtap.len and rtap.pad are undone immediately */
328 skb_pull(skb, sizeof(rtap) + rtap.len + rtap.pad);
329 }
Thomas Pedersenf4bda332012-11-13 10:46:27 -0800330
331 mpdulen = skb->len;
Johannes Berg30686bf2015-06-02 21:39:54 +0200332 if (!(has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)))
Thomas Pedersenf4bda332012-11-13 10:46:27 -0800333 mpdulen += FCS_LEN;
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200334
Johannes Bergd58ff352017-06-16 14:29:23 +0200335 rthdr = skb_push(skb, rtap_len);
Johannes Berg1f7bba72014-11-06 22:56:36 +0100336 memset(rthdr, 0, rtap_len - rtap.len - rtap.pad);
Johannes Berga144f372013-07-03 13:34:02 +0200337 it_present = &rthdr->it_present;
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200338
339 /* radiotap header, set always present flags */
Emmanuel Grumbach0059b2b2014-02-05 16:36:01 +0200340 rthdr->it_len = cpu_to_le16(rtap_len);
Johannes Berga144f372013-07-03 13:34:02 +0200341 it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) |
342 BIT(IEEE80211_RADIOTAP_CHANNEL) |
343 BIT(IEEE80211_RADIOTAP_RX_FLAGS);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200344
Johannes Berga144f372013-07-03 13:34:02 +0200345 if (!status->chains)
346 it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA);
347
348 for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) {
349 it_present_val |=
350 BIT(IEEE80211_RADIOTAP_EXT) |
351 BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE);
352 put_unaligned_le32(it_present_val, it_present);
353 it_present++;
354 it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) |
355 BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
356 }
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200357
Johannes Berg1f7bba72014-11-06 22:56:36 +0100358 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
359 it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) |
360 BIT(IEEE80211_RADIOTAP_EXT);
361 put_unaligned_le32(it_present_val, it_present);
362 it_present++;
363 it_present_val = rtap.present;
364 }
365
Johannes Berga144f372013-07-03 13:34:02 +0200366 put_unaligned_le32(it_present_val, it_present);
367
368 pos = (void *)(it_present + 1);
369
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200370 /* the order of the following fields is important */
371
372 /* IEEE80211_RADIOTAP_TSFT */
Thomas Pedersenf4bda332012-11-13 10:46:27 -0800373 if (ieee80211_have_rx_timestamp(status)) {
Johannes Berg90b9e4462012-11-16 10:09:08 +0100374 /* padding */
375 while ((pos - (u8 *)rthdr) & 7)
376 *pos++ = 0;
Thomas Pedersenf4bda332012-11-13 10:46:27 -0800377 put_unaligned_le64(
378 ieee80211_calculate_rx_timestamp(local, status,
379 mpdulen, 0),
380 pos);
Johannes Berg1df332e2012-10-26 00:09:11 +0200381 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200382 pos += 8;
383 }
384
385 /* IEEE80211_RADIOTAP_FLAGS */
Johannes Berg30686bf2015-06-02 21:39:54 +0200386 if (has_fcs && ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS))
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200387 *pos |= IEEE80211_RADIOTAP_F_FCS;
Johannes Bergaae89832009-03-13 12:52:10 +0100388 if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
389 *pos |= IEEE80211_RADIOTAP_F_BADFCS;
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200390 if (status->enc_flags & RX_ENC_FLAG_SHORTPRE)
Bruno Randolfb4f28bb2008-07-30 17:19:55 +0200391 *pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200392 pos++;
393
394 /* IEEE80211_RADIOTAP_RATE */
Johannes Bergda6a4352017-04-26 12:14:59 +0200395 if (!rate || status->encoding != RX_ENC_LEGACY) {
Jouni Malinen0fb8ca42008-12-12 14:38:33 +0200396 /*
Johannes Bergf8d1ccf2011-11-08 12:28:33 +0100397 * Without rate information don't add it. If we have,
Mohammed Shafi Shajakhan38f37be2011-02-07 10:10:04 +0530398 * MCS information is a separate field in radiotap,
Johannes Berg73b48092011-04-18 17:05:21 +0200399 * added below. The byte here is needed as padding
400 * for the channel though, so initialise it to 0.
Jouni Malinen0fb8ca42008-12-12 14:38:33 +0200401 */
402 *pos = 0;
Jouni Malinen8d6f6582008-12-15 10:37:50 +0200403 } else {
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200404 int shift = 0;
Jouni Malinenebe6c7b2009-01-10 11:47:33 +0200405 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
Johannes Bergda6a4352017-04-26 12:14:59 +0200406 if (status->bw == RATE_INFO_BW_10)
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200407 shift = 1;
Johannes Bergda6a4352017-04-26 12:14:59 +0200408 else if (status->bw == RATE_INFO_BW_5)
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200409 shift = 2;
410 *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift));
Jouni Malinen8d6f6582008-12-15 10:37:50 +0200411 }
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200412 pos++;
413
414 /* IEEE80211_RADIOTAP_CHANNEL */
Johannes Berg6a86b9c2009-10-28 09:58:52 +0100415 put_unaligned_le16(status->freq, pos);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200416 pos += 2;
Johannes Bergda6a4352017-04-26 12:14:59 +0200417 if (status->bw == RATE_INFO_BW_10)
Simon Wunderlicha5e70692013-07-08 16:55:52 +0200418 channel_flags |= IEEE80211_CHAN_HALF;
Johannes Bergda6a4352017-04-26 12:14:59 +0200419 else if (status->bw == RATE_INFO_BW_5)
Simon Wunderlicha5e70692013-07-08 16:55:52 +0200420 channel_flags |= IEEE80211_CHAN_QUARTER;
421
Johannes Berg57fbcce2016-04-12 15:56:15 +0200422 if (status->band == NL80211_BAND_5GHZ)
Simon Wunderlicha5e70692013-07-08 16:55:52 +0200423 channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ;
Johannes Bergda6a4352017-04-26 12:14:59 +0200424 else if (status->encoding != RX_ENC_LEGACY)
Simon Wunderlicha5e70692013-07-08 16:55:52 +0200425 channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
Johannes Bergf8d1ccf2011-11-08 12:28:33 +0100426 else if (rate && rate->flags & IEEE80211_RATE_ERP_G)
Simon Wunderlicha5e70692013-07-08 16:55:52 +0200427 channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ;
Johannes Bergf8d1ccf2011-11-08 12:28:33 +0100428 else if (rate)
Mathy Vanhoef3a5c5e82015-01-20 15:05:08 +0100429 channel_flags |= IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ;
Johannes Bergf8d1ccf2011-11-08 12:28:33 +0100430 else
Simon Wunderlicha5e70692013-07-08 16:55:52 +0200431 channel_flags |= IEEE80211_CHAN_2GHZ;
432 put_unaligned_le16(channel_flags, pos);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200433 pos += 2;
434
435 /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
Johannes Berg30686bf2015-06-02 21:39:54 +0200436 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM) &&
Felix Fietkaufe8431f2012-03-01 18:00:07 +0100437 !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200438 *pos = status->signal;
439 rthdr->it_present |=
440 cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
441 pos++;
442 }
443
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200444 /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */
445
Johannes Berga144f372013-07-03 13:34:02 +0200446 if (!status->chains) {
447 /* IEEE80211_RADIOTAP_ANTENNA */
448 *pos = status->antenna;
449 pos++;
450 }
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200451
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200452 /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
453
454 /* IEEE80211_RADIOTAP_RX_FLAGS */
455 /* ensure 2 byte alignment for the 2 byte field as required */
Johannes Berg6a86b9c2009-10-28 09:58:52 +0100456 if ((pos - (u8 *)rthdr) & 1)
Johannes Berg90b9e4462012-11-16 10:09:08 +0100457 *pos++ = 0;
Johannes Bergaae89832009-03-13 12:52:10 +0100458 if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
Johannes Berg6a86b9c2009-10-28 09:58:52 +0100459 rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
460 put_unaligned_le16(rx_flags, pos);
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200461 pos += 2;
Johannes Berg6d744ba2011-01-27 14:13:17 +0100462
Johannes Bergda6a4352017-04-26 12:14:59 +0200463 if (status->encoding == RX_ENC_HT) {
Oleksij Rempel786677d2013-05-24 12:05:45 +0200464 unsigned int stbc;
465
Johannes Berg6d744ba2011-01-27 14:13:17 +0100466 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
Johannes Bergac55d2f2012-05-10 09:09:10 +0200467 *pos++ = local->hw.radiotap_mcs_details;
Johannes Berg6d744ba2011-01-27 14:13:17 +0100468 *pos = 0;
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200469 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
Johannes Berg6d744ba2011-01-27 14:13:17 +0100470 *pos |= IEEE80211_RADIOTAP_MCS_SGI;
Johannes Bergda6a4352017-04-26 12:14:59 +0200471 if (status->bw == RATE_INFO_BW_40)
Johannes Berg6d744ba2011-01-27 14:13:17 +0100472 *pos |= IEEE80211_RADIOTAP_MCS_BW_40;
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200473 if (status->enc_flags & RX_ENC_FLAG_HT_GF)
Johannes Bergac55d2f2012-05-10 09:09:10 +0200474 *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF;
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200475 if (status->enc_flags & RX_ENC_FLAG_LDPC)
Emmanuel Grumbach63c361f2014-02-05 12:48:53 +0200476 *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC;
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200477 stbc = (status->enc_flags & RX_ENC_FLAG_STBC_MASK) >> RX_ENC_FLAG_STBC_SHIFT;
Oleksij Rempel786677d2013-05-24 12:05:45 +0200478 *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT;
Johannes Berg6d744ba2011-01-27 14:13:17 +0100479 pos++;
480 *pos++ = status->rate_idx;
481 }
Johannes Berg4c298672012-07-05 11:34:31 +0200482
483 if (status->flag & RX_FLAG_AMPDU_DETAILS) {
484 u16 flags = 0;
485
486 /* ensure 4 byte alignment */
487 while ((pos - (u8 *)rthdr) & 3)
488 pos++;
489 rthdr->it_present |=
490 cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS);
491 put_unaligned_le32(status->ampdu_reference, pos);
492 pos += 4;
Johannes Berg4c298672012-07-05 11:34:31 +0200493 if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN)
494 flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN;
495 if (status->flag & RX_FLAG_AMPDU_IS_LAST)
496 flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST;
497 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR)
498 flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR;
499 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
500 flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN;
Johannes Berg7299d6f2018-02-19 14:48:39 +0200501 if (status->flag & RX_FLAG_AMPDU_EOF_BIT_KNOWN)
502 flags |= IEEE80211_RADIOTAP_AMPDU_EOF_KNOWN;
503 if (status->flag & RX_FLAG_AMPDU_EOF_BIT)
504 flags |= IEEE80211_RADIOTAP_AMPDU_EOF;
Johannes Berg4c298672012-07-05 11:34:31 +0200505 put_unaligned_le16(flags, pos);
506 pos += 2;
507 if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
508 *pos++ = status->ampdu_delimiter_crc;
509 else
510 *pos++ = 0;
511 *pos++ = 0;
512 }
Johannes Berg90b9e4462012-11-16 10:09:08 +0100513
Johannes Bergda6a4352017-04-26 12:14:59 +0200514 if (status->encoding == RX_ENC_VHT) {
Johannes Berg51648922012-11-22 23:00:18 +0100515 u16 known = local->hw.radiotap_vht_details;
516
517 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
Johannes Berg51648922012-11-22 23:00:18 +0100518 put_unaligned_le16(known, pos);
519 pos += 2;
520 /* flags */
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200521 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
Johannes Berg51648922012-11-22 23:00:18 +0100522 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
Emmanuel Grumbach63c361f2014-02-05 12:48:53 +0200523 /* in VHT, STBC is binary */
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200524 if (status->enc_flags & RX_ENC_FLAG_STBC_MASK)
Emmanuel Grumbach63c361f2014-02-05 12:48:53 +0200525 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC;
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200526 if (status->enc_flags & RX_ENC_FLAG_BF)
Emmanuel Grumbachfb378c22014-03-04 10:35:25 +0200527 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED;
Johannes Berg51648922012-11-22 23:00:18 +0100528 pos++;
529 /* bandwidth */
Johannes Bergda6a4352017-04-26 12:14:59 +0200530 switch (status->bw) {
531 case RATE_INFO_BW_80:
Johannes Berg51648922012-11-22 23:00:18 +0100532 *pos++ = 4;
Johannes Bergda6a4352017-04-26 12:14:59 +0200533 break;
534 case RATE_INFO_BW_160:
Johannes Berg51648922012-11-22 23:00:18 +0100535 *pos++ = 11;
Johannes Bergda6a4352017-04-26 12:14:59 +0200536 break;
537 case RATE_INFO_BW_40:
Johannes Berg51648922012-11-22 23:00:18 +0100538 *pos++ = 1;
Johannes Bergda6a4352017-04-26 12:14:59 +0200539 break;
540 default:
Johannes Berg51648922012-11-22 23:00:18 +0100541 *pos++ = 0;
Johannes Bergda6a4352017-04-26 12:14:59 +0200542 }
Johannes Berg51648922012-11-22 23:00:18 +0100543 /* MCS/NSS */
Johannes Berg8613c942017-04-26 13:51:41 +0200544 *pos = (status->rate_idx << 4) | status->nss;
Johannes Berg51648922012-11-22 23:00:18 +0100545 pos += 4;
546 /* coding field */
Johannes Berg7fdd69c2017-04-26 11:13:00 +0200547 if (status->enc_flags & RX_ENC_FLAG_LDPC)
Emmanuel Grumbach63c361f2014-02-05 12:48:53 +0200548 *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0;
Johannes Berg51648922012-11-22 23:00:18 +0100549 pos++;
550 /* group ID */
551 pos++;
552 /* partial_aid */
553 pos += 2;
554 }
555
Johannes Berg99ee7ca2016-08-29 23:25:17 +0300556 if (local->hw.radiotap_timestamp.units_pos >= 0) {
557 u16 accuracy = 0;
558 u8 flags = IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT;
559
560 rthdr->it_present |=
561 cpu_to_le32(1 << IEEE80211_RADIOTAP_TIMESTAMP);
562
563 /* ensure 8 byte alignment */
564 while ((pos - (u8 *)rthdr) & 7)
565 pos++;
566
567 put_unaligned_le64(status->device_timestamp, pos);
568 pos += sizeof(u64);
569
570 if (local->hw.radiotap_timestamp.accuracy >= 0) {
571 accuracy = local->hw.radiotap_timestamp.accuracy;
572 flags |= IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY;
573 }
574 put_unaligned_le16(accuracy, pos);
575 pos += sizeof(u16);
576
577 *pos++ = local->hw.radiotap_timestamp.units_pos;
578 *pos++ = flags;
579 }
580
Luca Coelho41cbb0f2018-06-09 09:14:44 +0300581 if (status->encoding == RX_ENC_HE &&
582 status->flag & RX_FLAG_RADIOTAP_HE) {
Johannes Berg331aead2018-08-31 11:31:07 +0300583#define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
Luca Coelho41cbb0f2018-06-09 09:14:44 +0300584
585 if (status->enc_flags & RX_ENC_FLAG_STBC_MASK) {
586 he.data6 |= HE_PREP(DATA6_NSTS,
587 FIELD_GET(RX_ENC_FLAG_STBC_MASK,
588 status->enc_flags));
589 he.data3 |= HE_PREP(DATA3_STBC, 1);
590 } else {
591 he.data6 |= HE_PREP(DATA6_NSTS, status->nss);
592 }
593
594#define CHECK_GI(s) \
595 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
596 (int)NL80211_RATE_INFO_HE_GI_##s)
597
598 CHECK_GI(0_8);
599 CHECK_GI(1_6);
600 CHECK_GI(3_2);
601
602 he.data3 |= HE_PREP(DATA3_DATA_MCS, status->rate_idx);
603 he.data3 |= HE_PREP(DATA3_DATA_DCM, status->he_dcm);
604 he.data3 |= HE_PREP(DATA3_CODING,
605 !!(status->enc_flags & RX_ENC_FLAG_LDPC));
606
607 he.data5 |= HE_PREP(DATA5_GI, status->he_gi);
608
609 switch (status->bw) {
610 case RATE_INFO_BW_20:
611 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
612 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
613 break;
614 case RATE_INFO_BW_40:
615 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
616 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
617 break;
618 case RATE_INFO_BW_80:
619 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
620 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
621 break;
622 case RATE_INFO_BW_160:
623 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
624 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
625 break;
626 case RATE_INFO_BW_HE_RU:
627#define CHECK_RU_ALLOC(s) \
628 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
629 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
630
631 CHECK_RU_ALLOC(26);
632 CHECK_RU_ALLOC(52);
633 CHECK_RU_ALLOC(106);
634 CHECK_RU_ALLOC(242);
635 CHECK_RU_ALLOC(484);
636 CHECK_RU_ALLOC(996);
637 CHECK_RU_ALLOC(2x996);
638
639 he.data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
640 status->he_ru + 4);
641 break;
642 default:
643 WARN_ONCE(1, "Invalid SU BW %d\n", status->bw);
644 }
645
646 /* ensure 2 byte alignment */
647 while ((pos - (u8 *)rthdr) & 1)
648 pos++;
649 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
650 memcpy(pos, &he, sizeof(he));
651 pos += sizeof(he);
652 }
653
654 if (status->encoding == RX_ENC_HE &&
655 status->flag & RX_FLAG_RADIOTAP_HE_MU) {
656 /* ensure 2 byte alignment */
657 while ((pos - (u8 *)rthdr) & 1)
658 pos++;
659 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE_MU);
660 memcpy(pos, &he_mu, sizeof(he_mu));
661 pos += sizeof(he_mu);
662 }
663
Shaul Triebitzc3d1f872018-09-05 08:06:06 +0300664 if (status->flag & RX_FLAG_NO_PSDU) {
665 rthdr->it_present |=
666 cpu_to_le32(1 << IEEE80211_RADIOTAP_ZERO_LEN_PSDU);
667 *pos++ = status->zero_length_psdu_type;
668 }
669
Shaul Triebitzd1332e72018-08-31 11:31:20 +0300670 if (status->flag & RX_FLAG_RADIOTAP_LSIG) {
671 /* ensure 2 byte alignment */
672 while ((pos - (u8 *)rthdr) & 1)
673 pos++;
674 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_LSIG);
675 memcpy(pos, &lsig, sizeof(lsig));
676 pos += sizeof(lsig);
677 }
678
Johannes Berga144f372013-07-03 13:34:02 +0200679 for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) {
680 *pos++ = status->chain_signal[chain];
681 *pos++ = chain;
682 }
Johannes Berg1f7bba72014-11-06 22:56:36 +0100683
684 if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
685 /* ensure 2 byte alignment for the vendor field as required */
686 if ((pos - (u8 *)rthdr) & 1)
687 *pos++ = 0;
688 *pos++ = rtap.oui[0];
689 *pos++ = rtap.oui[1];
690 *pos++ = rtap.oui[2];
691 *pos++ = rtap.subns;
692 put_unaligned_le16(rtap.len, pos);
693 pos += 2;
694 /* align the actual payload as requested */
695 while ((pos - (u8 *)rthdr) & (rtap.align - 1))
696 *pos++ = 0;
697 /* data (and possible padding) already follows */
698 }
Bruno Randolf601ae7f2008-05-08 19:22:43 +0200699}
700
Johannes Berg127f60b2017-04-13 15:50:27 +0200701static struct sk_buff *
702ieee80211_make_monitor_skb(struct ieee80211_local *local,
703 struct sk_buff **origskb,
704 struct ieee80211_rate *rate,
Johannes Bergc096b922018-04-20 13:49:18 +0300705 int rtap_space, bool use_origskb)
Johannes Berg127f60b2017-04-13 15:50:27 +0200706{
707 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(*origskb);
708 int rt_hdrlen, needed_headroom;
709 struct sk_buff *skb;
710
711 /* room for the radiotap header based on driver features */
712 rt_hdrlen = ieee80211_rx_radiotap_hdrlen(local, status, *origskb);
Johannes Bergc096b922018-04-20 13:49:18 +0300713 needed_headroom = rt_hdrlen - rtap_space;
Johannes Berg127f60b2017-04-13 15:50:27 +0200714
715 if (use_origskb) {
716 /* only need to expand headroom if necessary */
717 skb = *origskb;
718 *origskb = NULL;
719
720 /*
721 * This shouldn't trigger often because most devices have an
722 * RX header they pull before we get here, and that should
723 * be big enough for our radiotap information. We should
724 * probably export the length to drivers so that we can have
725 * them allocate enough headroom to start with.
726 */
727 if (skb_headroom(skb) < needed_headroom &&
728 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) {
729 dev_kfree_skb(skb);
730 return NULL;
731 }
732 } else {
733 /*
734 * Need to make a copy and possibly remove radiotap header
735 * and FCS from the original.
736 */
737 skb = skb_copy_expand(*origskb, needed_headroom, 0, GFP_ATOMIC);
738
739 if (!skb)
740 return NULL;
741 }
742
743 /* prepend radiotap information */
744 ieee80211_add_rx_radiotap_header(local, skb, rate, rt_hdrlen, true);
745
746 skb_reset_mac_header(skb);
747 skb->ip_summed = CHECKSUM_UNNECESSARY;
748 skb->pkt_type = PACKET_OTHERHOST;
749 skb->protocol = htons(ETH_P_802_2);
750
751 return skb;
752}
753
Johannes Bergb2e77712007-09-26 15:19:39 +0200754/*
755 * This function copies a received frame to all monitor interfaces and
756 * returns a cleaned-up SKB that no longer includes the FCS nor the
757 * radiotap header the driver might have added.
758 */
759static struct sk_buff *
760ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
Johannes Berg8318d782008-01-24 19:38:38 +0100761 struct ieee80211_rate *rate)
Johannes Bergb2e77712007-09-26 15:19:39 +0200762{
Johannes Bergf1d58c22009-06-17 13:13:00 +0200763 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb);
Johannes Bergb2e77712007-09-26 15:19:39 +0200764 struct ieee80211_sub_if_data *sdata;
Johannes Berg127f60b2017-04-13 15:50:27 +0200765 struct sk_buff *monskb = NULL;
Johannes Bergb2e77712007-09-26 15:19:39 +0200766 int present_fcs_len = 0;
Johannes Bergc096b922018-04-20 13:49:18 +0300767 unsigned int rtap_space = 0;
Aviya Erenfeld42bd20d2016-08-29 23:25:16 +0300768 struct ieee80211_sub_if_data *monitor_sdata =
769 rcu_dereference(local->monitor_sdata);
Johannes Berg127f60b2017-04-13 15:50:27 +0200770 bool only_monitor = false;
Ilan Peer80209192018-12-15 11:03:17 +0200771 unsigned int min_head_len;
Johannes Berg1f7bba72014-11-06 22:56:36 +0100772
Luca Coelho41cbb0f2018-06-09 09:14:44 +0300773 if (status->flag & RX_FLAG_RADIOTAP_HE)
774 rtap_space += sizeof(struct ieee80211_radiotap_he);
775
776 if (status->flag & RX_FLAG_RADIOTAP_HE_MU)
777 rtap_space += sizeof(struct ieee80211_radiotap_he_mu);
778
Ilan Peerd359bbc2018-12-15 11:03:25 +0200779 if (status->flag & RX_FLAG_RADIOTAP_LSIG)
780 rtap_space += sizeof(struct ieee80211_radiotap_lsig);
781
Johannes Berg1f7bba72014-11-06 22:56:36 +0100782 if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) {
Ilan Peerd359bbc2018-12-15 11:03:25 +0200783 struct ieee80211_vendor_radiotap *rtap =
784 (void *)(origskb->data + rtap_space);
Johannes Berg1f7bba72014-11-06 22:56:36 +0100785
Johannes Bergc096b922018-04-20 13:49:18 +0300786 rtap_space += sizeof(*rtap) + rtap->len + rtap->pad;
Johannes Berg1f7bba72014-11-06 22:56:36 +0100787 }
Johannes Bergb2e77712007-09-26 15:19:39 +0200788
Ilan Peer80209192018-12-15 11:03:17 +0200789 min_head_len = rtap_space;
790
Johannes Bergb2e77712007-09-26 15:19:39 +0200791 /*
792 * First, we may need to make a copy of the skb because
793 * (1) we need to modify it for radiotap (if not present), and
794 * (2) the other RX handlers will modify the skb we got.
795 *
796 * We don't need to, of course, if we aren't going to return
797 * the SKB because it has a bad FCS/PLCP checksum.
798 */
Johannes Berg0869aea02009-10-28 10:03:35 +0100799
Ilan Peer80209192018-12-15 11:03:17 +0200800 if (!(status->flag & RX_FLAG_NO_PSDU)) {
801 if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) {
802 if (unlikely(origskb->len <= FCS_LEN + rtap_space)) {
803 /* driver bug */
804 WARN_ON(1);
805 dev_kfree_skb(origskb);
806 return NULL;
807 }
808 present_fcs_len = FCS_LEN;
Johannes Berg30841f52017-04-11 15:38:56 +0200809 }
Ilan Peer80209192018-12-15 11:03:17 +0200810
811 /* also consider the hdr->frame_control */
812 min_head_len += 2;
Johannes Berg30841f52017-04-11 15:38:56 +0200813 }
Johannes Bergb2e77712007-09-26 15:19:39 +0200814
Ilan Peer80209192018-12-15 11:03:17 +0200815 /* ensure that the expected data elements are in skb head */
816 if (!pskb_may_pull(origskb, min_head_len)) {
Zhu Yie3cf8b3f2010-03-29 17:35:07 +0800817 dev_kfree_skb(origskb);
818 return NULL;
819 }
820
Johannes Bergc096b922018-04-20 13:49:18 +0300821 only_monitor = should_drop_frame(origskb, present_fcs_len, rtap_space);
Johannes Berg127f60b2017-04-13 15:50:27 +0200822
Grzegorz Bajorski17883042015-12-11 14:39:46 +0100823 if (!local->monitors || (status->flag & RX_FLAG_SKIP_MONITOR)) {
Johannes Berg127f60b2017-04-13 15:50:27 +0200824 if (only_monitor) {
Johannes Bergb2e77712007-09-26 15:19:39 +0200825 dev_kfree_skb(origskb);
826 return NULL;
827 }
828
Johannes Bergc096b922018-04-20 13:49:18 +0300829 remove_monitor_info(origskb, present_fcs_len, rtap_space);
Johannes Berg30841f52017-04-11 15:38:56 +0200830 return origskb;
Johannes Bergb2e77712007-09-26 15:19:39 +0200831 }
832
Johannes Bergc096b922018-04-20 13:49:18 +0300833 ieee80211_handle_mu_mimo_mon(monitor_sdata, origskb, rtap_space);
Johannes Berg9e478062017-04-13 14:23:49 +0200834
Johannes Bergf64331d2017-04-13 13:28:18 +0200835 list_for_each_entry_rcu(sdata, &local->mon_list, u.mntr.list) {
Johannes Berg127f60b2017-04-13 15:50:27 +0200836 bool last_monitor = list_is_last(&sdata->u.mntr.list,
837 &local->mon_list);
838
839 if (!monskb)
840 monskb = ieee80211_make_monitor_skb(local, &origskb,
Johannes Bergc096b922018-04-20 13:49:18 +0300841 rate, rtap_space,
Johannes Berg127f60b2017-04-13 15:50:27 +0200842 only_monitor &&
843 last_monitor);
844
845 if (monskb) {
846 struct sk_buff *skb;
847
848 if (last_monitor) {
849 skb = monskb;
850 monskb = NULL;
851 } else {
852 skb = skb_clone(monskb, GFP_ATOMIC);
853 }
854
855 if (skb) {
856 skb->dev = sdata->dev;
857 ieee80211_rx_stats(skb->dev, skb->len);
858 netif_receive_skb(skb);
Johannes Bergb2e77712007-09-26 15:19:39 +0200859 }
860 }
861
Johannes Berg127f60b2017-04-13 15:50:27 +0200862 if (last_monitor)
863 break;
Johannes Bergb2e77712007-09-26 15:19:39 +0200864 }
865
Johannes Berg127f60b2017-04-13 15:50:27 +0200866 /* this happens if last_monitor was erroneously false */
867 dev_kfree_skb(monskb);
Johannes Bergb2e77712007-09-26 15:19:39 +0200868
Johannes Berg127f60b2017-04-13 15:50:27 +0200869 /* ditto */
870 if (!origskb)
871 return NULL;
872
Johannes Bergc096b922018-04-20 13:49:18 +0300873 remove_monitor_info(origskb, present_fcs_len, rtap_space);
Johannes Bergb2e77712007-09-26 15:19:39 +0200874 return origskb;
875}
876
Johannes Berg5cf121c2008-02-25 16:27:43 +0100877static void ieee80211_parse_qos(struct ieee80211_rx_data *rx)
Johannes Berg6e0d1142007-07-27 15:43:22 +0200878{
Harvey Harrison238f74a2008-07-02 11:05:34 -0700879 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
Johannes Berg554891e2010-09-24 12:38:25 +0200880 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Berg9e262972011-07-07 18:45:03 +0200881 int tid, seqno_idx, security_idx;
Johannes Berg6e0d1142007-07-27 15:43:22 +0200882
883 /* does the frame have a qos control field? */
Harvey Harrison238f74a2008-07-02 11:05:34 -0700884 if (ieee80211_is_data_qos(hdr->frame_control)) {
885 u8 *qc = ieee80211_get_qos_ctl(hdr);
Johannes Berg6e0d1142007-07-27 15:43:22 +0200886 /* frame has qos control */
Harvey Harrison238f74a2008-07-02 11:05:34 -0700887 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
Johannes Berg04b7dcf2011-06-22 10:06:59 +0200888 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
Johannes Berg554891e2010-09-24 12:38:25 +0200889 status->rx_flags |= IEEE80211_RX_AMSDU;
Johannes Berg9e262972011-07-07 18:45:03 +0200890
891 seqno_idx = tid;
892 security_idx = tid;
Johannes Berg6e0d1142007-07-27 15:43:22 +0200893 } else {
Johannes Berg1411f9b2008-07-10 10:11:02 +0200894 /*
895 * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"):
896 *
897 * Sequence numbers for management frames, QoS data
898 * frames with a broadcast/multicast address in the
899 * Address 1 field, and all non-QoS data frames sent
900 * by QoS STAs are assigned using an additional single
901 * modulo-4096 counter, [...]
902 *
903 * We also use that counter for non-QoS STAs.
904 */
Johannes Berg5a306f52012-11-14 23:22:21 +0100905 seqno_idx = IEEE80211_NUM_TIDS;
Johannes Berg9e262972011-07-07 18:45:03 +0200906 security_idx = 0;
907 if (ieee80211_is_mgmt(hdr->frame_control))
Johannes Berg5a306f52012-11-14 23:22:21 +0100908 security_idx = IEEE80211_NUM_TIDS;
Johannes Berg9e262972011-07-07 18:45:03 +0200909 tid = 0;
Johannes Berg6e0d1142007-07-27 15:43:22 +0200910 }
Johannes Berg52865dfd2007-07-27 15:43:22 +0200911
Johannes Berg9e262972011-07-07 18:45:03 +0200912 rx->seqno_idx = seqno_idx;
913 rx->security_idx = security_idx;
Johannes Berg6e0d1142007-07-27 15:43:22 +0200914 /* Set skb->priority to 1d tag if highest order bit of TID is not set.
915 * For now, set skb->priority to 0 for other cases. */
916 rx->skb->priority = (tid > 7) ? 0 : tid;
Johannes Berg38f37142008-01-29 17:07:43 +0100917}
Johannes Berg6e0d1142007-07-27 15:43:22 +0200918
Johannes Bergd1c3a372009-01-07 00:26:10 +0100919/**
920 * DOC: Packet alignment
921 *
922 * Drivers always need to pass packets that are aligned to two-byte boundaries
923 * to the stack.
924 *
925 * Additionally, should, if possible, align the payload data in a way that
926 * guarantees that the contained IP header is aligned to a four-byte
927 * boundary. In the case of regular frames, this simply means aligning the
928 * payload to a four-byte boundary (because either the IP header is directly
929 * contained, or IV/RFC1042 headers that have a length divisible by four are
Kalle Valo59d9cb02009-12-17 13:54:57 +0100930 * in front of it). If the payload data is not properly aligned and the
931 * architecture doesn't support efficient unaligned operations, mac80211
932 * will align the data.
Johannes Bergd1c3a372009-01-07 00:26:10 +0100933 *
934 * With A-MSDU frames, however, the payload data address must yield two modulo
935 * four because there are 14-byte 802.3 headers within the A-MSDU frames that
936 * push the IP header further back to a multiple of four again. Thankfully, the
937 * specs were sane enough this time around to require padding each A-MSDU
938 * subframe to a length that is a multiple of four.
939 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300940 * Padding like Atheros hardware adds which is between the 802.11 header and
Johannes Bergd1c3a372009-01-07 00:26:10 +0100941 * the payload is not supported, the driver is required to move the 802.11
942 * header to be directly in front of the payload in that case.
943 */
944static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx)
Johannes Berg38f37142008-01-29 17:07:43 +0100945{
Kalle Valo59d9cb02009-12-17 13:54:57 +0100946#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Berg441275e2015-11-06 12:34:24 +0100947 WARN_ON_ONCE((unsigned long)rx->skb->data & 1);
Johannes Bergd1c3a372009-01-07 00:26:10 +0100948#endif
Johannes Berg6e0d1142007-07-27 15:43:22 +0200949}
950
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +0200951
Johannes Berg571ecf62007-07-27 15:43:22 +0200952/* rx handlers */
953
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200954static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb)
955{
956 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
957
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100958 if (is_multicast_ether_addr(hdr->addr1))
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200959 return 0;
960
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100961 return ieee80211_is_robust_mgmt_frame(skb);
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200962}
963
964
965static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb)
966{
967 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
968
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100969 if (!is_multicast_ether_addr(hdr->addr1))
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200970 return 0;
971
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100972 return ieee80211_is_robust_mgmt_frame(skb);
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200973}
974
975
976/* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */
977static int ieee80211_get_mmie_keyidx(struct sk_buff *skb)
978{
979 struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data;
980 struct ieee80211_mmie *mmie;
Jouni Malinen56c52da2015-01-24 19:52:08 +0200981 struct ieee80211_mmie_16 *mmie16;
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200982
Johannes Berg1df332e2012-10-26 00:09:11 +0200983 if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da))
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200984 return -1;
985
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100986 if (!ieee80211_is_robust_mgmt_frame(skb))
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200987 return -1; /* not a robust management frame */
988
989 mmie = (struct ieee80211_mmie *)
990 (skb->data + skb->len - sizeof(*mmie));
Jouni Malinen56c52da2015-01-24 19:52:08 +0200991 if (mmie->element_id == WLAN_EID_MMIE &&
992 mmie->length == sizeof(*mmie) - 2)
993 return le16_to_cpu(mmie->key_id);
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200994
Jouni Malinen56c52da2015-01-24 19:52:08 +0200995 mmie16 = (struct ieee80211_mmie_16 *)
996 (skb->data + skb->len - sizeof(*mmie16));
997 if (skb->len >= 24 + sizeof(*mmie16) &&
998 mmie16->element_id == WLAN_EID_MMIE &&
999 mmie16->length == sizeof(*mmie16) - 2)
1000 return le16_to_cpu(mmie16->key_id);
1001
1002 return -1;
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +02001003}
1004
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001005static int ieee80211_get_keyid(struct sk_buff *skb,
1006 const struct ieee80211_cipher_scheme *cs)
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001007{
1008 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1009 __le16 fc;
1010 int hdrlen;
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001011 int minlen;
1012 u8 key_idx_off;
1013 u8 key_idx_shift;
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001014 u8 keyid;
1015
1016 fc = hdr->frame_control;
1017 hdrlen = ieee80211_hdrlen(fc);
1018
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001019 if (cs) {
1020 minlen = hdrlen + cs->hdr_len;
1021 key_idx_off = hdrlen + cs->key_idx_off;
1022 key_idx_shift = cs->key_idx_shift;
1023 } else {
1024 /* WEP, TKIP, CCMP and GCMP */
1025 minlen = hdrlen + IEEE80211_WEP_IV_LEN;
1026 key_idx_off = hdrlen + 3;
1027 key_idx_shift = 6;
1028 }
1029
1030 if (unlikely(skb->len < minlen))
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001031 return -EINVAL;
1032
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001033 skb_copy_bits(skb, key_idx_off, &keyid, 1);
1034
1035 if (cs)
1036 keyid &= cs->key_idx_mask;
1037 keyid >>= key_idx_shift;
1038
1039 /* cs could use more than the usual two bits for the keyid */
1040 if (unlikely(keyid >= NUM_DEFAULT_KEYS))
1041 return -EINVAL;
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001042
1043 return keyid;
1044}
1045
Johannes Berg1df332e2012-10-26 00:09:11 +02001046static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001047{
Harvey Harrisona7767f92008-07-02 16:30:51 -07001048 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
Johannes Berg47846c92009-11-25 17:46:19 +01001049 char *dev_addr = rx->sdata->vif.addr;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +01001050
Harvey Harrisona7767f92008-07-02 16:30:51 -07001051 if (ieee80211_is_data(hdr->frame_control)) {
Javier Cardona3c5772a2009-08-10 12:15:48 -07001052 if (is_multicast_ether_addr(hdr->addr1)) {
1053 if (ieee80211_has_tods(hdr->frame_control) ||
Johannes Berg1df332e2012-10-26 00:09:11 +02001054 !ieee80211_has_fromds(hdr->frame_control))
Javier Cardona3c5772a2009-08-10 12:15:48 -07001055 return RX_DROP_MONITOR;
Joe Perchesb203ca32012-05-08 18:56:52 +00001056 if (ether_addr_equal(hdr->addr3, dev_addr))
Javier Cardona3c5772a2009-08-10 12:15:48 -07001057 return RX_DROP_MONITOR;
1058 } else {
1059 if (!ieee80211_has_a4(hdr->frame_control))
1060 return RX_DROP_MONITOR;
Joe Perchesb203ca32012-05-08 18:56:52 +00001061 if (ether_addr_equal(hdr->addr4, dev_addr))
Javier Cardona3c5772a2009-08-10 12:15:48 -07001062 return RX_DROP_MONITOR;
1063 }
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001064 }
1065
1066 /* If there is not an established peer link and this is not a peer link
1067 * establisment frame, beacon or probe, drop the frame.
1068 */
1069
Javier Cardona57cf8042011-05-13 10:45:43 -07001070 if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) {
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001071 struct ieee80211_mgmt *mgmt;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +01001072
Harvey Harrisona7767f92008-07-02 16:30:51 -07001073 if (!ieee80211_is_mgmt(hdr->frame_control))
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001074 return RX_DROP_MONITOR;
1075
Harvey Harrisona7767f92008-07-02 16:30:51 -07001076 if (ieee80211_is_action(hdr->frame_control)) {
Javier Cardonad3aaec8a2011-05-03 16:57:09 -07001077 u8 category;
Johannes Berg9b395bc2012-10-26 00:36:40 +02001078
1079 /* make sure category field is present */
1080 if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE)
1081 return RX_DROP_MONITOR;
1082
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001083 mgmt = (struct ieee80211_mgmt *)hdr;
Javier Cardonad3aaec8a2011-05-03 16:57:09 -07001084 category = mgmt->u.action.category;
1085 if (category != WLAN_CATEGORY_MESH_ACTION &&
Johannes Berg1df332e2012-10-26 00:09:11 +02001086 category != WLAN_CATEGORY_SELF_PROTECTED)
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001087 return RX_DROP_MONITOR;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001088 return RX_CONTINUE;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001089 }
1090
Harvey Harrisona7767f92008-07-02 16:30:51 -07001091 if (ieee80211_is_probe_req(hdr->frame_control) ||
1092 ieee80211_is_probe_resp(hdr->frame_control) ||
Javier Cardona71839122011-04-07 15:08:31 -07001093 ieee80211_is_beacon(hdr->frame_control) ||
1094 ieee80211_is_auth(hdr->frame_control))
Harvey Harrisona7767f92008-07-02 16:30:51 -07001095 return RX_CONTINUE;
1096
1097 return RX_DROP_MONITOR;
Harvey Harrisona7767f92008-07-02 16:30:51 -07001098 }
1099
Johannes Berg902acc72008-02-23 15:17:19 +01001100 return RX_CONTINUE;
1101}
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001102
Johannes Bergfb4ea052016-01-28 16:19:24 +02001103static inline bool ieee80211_rx_reorder_ready(struct tid_ampdu_rx *tid_agg_rx,
1104 int index)
1105{
1106 struct sk_buff_head *frames = &tid_agg_rx->reorder_buf[index];
1107 struct sk_buff *tail = skb_peek_tail(frames);
1108 struct ieee80211_rx_status *status;
1109
Sara Sharon06470f72016-01-28 16:19:25 +02001110 if (tid_agg_rx->reorder_buf_filtered & BIT_ULL(index))
1111 return true;
1112
Johannes Bergfb4ea052016-01-28 16:19:24 +02001113 if (!tail)
1114 return false;
1115
1116 status = IEEE80211_SKB_RXCB(tail);
1117 if (status->flag & RX_FLAG_AMSDU_MORE)
1118 return false;
1119
1120 return true;
1121}
1122
Johannes Bergd3b2fb52012-06-22 12:48:38 +02001123static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata,
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001124 struct tid_ampdu_rx *tid_agg_rx,
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001125 int index,
1126 struct sk_buff_head *frames)
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001127{
Michal Kazior83eb9352014-07-16 12:09:31 +02001128 struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index];
1129 struct sk_buff *skb;
Christian Lamparter4cfda472010-12-27 23:21:26 +01001130 struct ieee80211_rx_status *status;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001131
Johannes Bergdd318572010-11-29 11:09:16 +01001132 lockdep_assert_held(&tid_agg_rx->reorder_lock);
1133
Michal Kazior83eb9352014-07-16 12:09:31 +02001134 if (skb_queue_empty(skb_list))
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001135 goto no_frame;
1136
Johannes Bergfb4ea052016-01-28 16:19:24 +02001137 if (!ieee80211_rx_reorder_ready(tid_agg_rx, index)) {
Michal Kazior83eb9352014-07-16 12:09:31 +02001138 __skb_queue_purge(skb_list);
1139 goto no_frame;
1140 }
1141
1142 /* release frames from the reorder ring buffer */
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001143 tid_agg_rx->stored_mpdu_num--;
Michal Kazior83eb9352014-07-16 12:09:31 +02001144 while ((skb = __skb_dequeue(skb_list))) {
1145 status = IEEE80211_SKB_RXCB(skb);
1146 status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE;
1147 __skb_queue_tail(frames, skb);
1148 }
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001149
1150no_frame:
Sara Sharon06470f72016-01-28 16:19:25 +02001151 tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index);
Johannes Berg9a886582013-02-15 19:25:00 +01001152 tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num);
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001153}
1154
Johannes Bergd3b2fb52012-06-22 12:48:38 +02001155static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata,
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001156 struct tid_ampdu_rx *tid_agg_rx,
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001157 u16 head_seq_num,
1158 struct sk_buff_head *frames)
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001159{
1160 int index;
1161
Johannes Bergdd318572010-11-29 11:09:16 +01001162 lockdep_assert_held(&tid_agg_rx->reorder_lock);
1163
Johannes Berg9a886582013-02-15 19:25:00 +01001164 while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) {
Karl Beldan2e3049b2013-10-24 15:53:32 +02001165 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001166 ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
1167 frames);
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001168 }
1169}
1170
1171/*
1172 * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
1173 * the skb was added to the buffer longer than this time ago, the earlier
1174 * frames that have not yet been received are assumed to be lost and the skb
1175 * can be released for processing. This may also release other skb's from the
1176 * reorder buffer if there are no additional gaps between the frames.
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001177 *
1178 * Callers must hold tid_agg_rx->reorder_lock.
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001179 */
1180#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
1181
Johannes Bergd3b2fb52012-06-22 12:48:38 +02001182static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata,
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001183 struct tid_ampdu_rx *tid_agg_rx,
1184 struct sk_buff_head *frames)
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001185{
Michal Kazior83eb9352014-07-16 12:09:31 +02001186 int index, i, j;
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001187
Johannes Bergdd318572010-11-29 11:09:16 +01001188 lockdep_assert_held(&tid_agg_rx->reorder_lock);
1189
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001190 /* release the buffer until next missing frame */
Karl Beldan2e3049b2013-10-24 15:53:32 +02001191 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
Johannes Bergfb4ea052016-01-28 16:19:24 +02001192 if (!ieee80211_rx_reorder_ready(tid_agg_rx, index) &&
Eliad Peller07ae2df2012-02-01 18:48:09 +02001193 tid_agg_rx->stored_mpdu_num) {
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001194 /*
1195 * No buffers ready to be released, but check whether any
1196 * frames in the reorder buffer have timed out.
1197 */
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001198 int skipped = 1;
1199 for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
1200 j = (j + 1) % tid_agg_rx->buf_size) {
Johannes Bergfb4ea052016-01-28 16:19:24 +02001201 if (!ieee80211_rx_reorder_ready(tid_agg_rx, j)) {
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001202 skipped++;
1203 continue;
1204 }
Daniel Halperin499fe9a2011-03-24 16:01:48 -07001205 if (skipped &&
1206 !time_after(jiffies, tid_agg_rx->reorder_time[j] +
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001207 HT_RX_REORDER_BUF_TIMEOUT))
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001208 goto set_release_timer;
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001209
Michal Kazior83eb9352014-07-16 12:09:31 +02001210 /* don't leave incomplete A-MSDUs around */
1211 for (i = (index + 1) % tid_agg_rx->buf_size; i != j;
1212 i = (i + 1) % tid_agg_rx->buf_size)
1213 __skb_queue_purge(&tid_agg_rx->reorder_buf[i]);
1214
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001215 ht_dbg_ratelimited(sdata,
1216 "release an RX reorder frame due to timeout on earlier frames\n");
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001217 ieee80211_release_reorder_frame(sdata, tid_agg_rx, j,
1218 frames);
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001219
1220 /*
1221 * Increment the head seq# also for the skipped slots.
1222 */
1223 tid_agg_rx->head_seq_num =
Johannes Berg9a886582013-02-15 19:25:00 +01001224 (tid_agg_rx->head_seq_num +
1225 skipped) & IEEE80211_SN_MASK;
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001226 skipped = 0;
1227 }
Johannes Bergfb4ea052016-01-28 16:19:24 +02001228 } else while (ieee80211_rx_reorder_ready(tid_agg_rx, index)) {
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001229 ieee80211_release_reorder_frame(sdata, tid_agg_rx, index,
1230 frames);
Karl Beldan2e3049b2013-10-24 15:53:32 +02001231 index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001232 }
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001233
1234 if (tid_agg_rx->stored_mpdu_num) {
Karl Beldan2e3049b2013-10-24 15:53:32 +02001235 j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size;
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001236
1237 for (; j != (index - 1) % tid_agg_rx->buf_size;
1238 j = (j + 1) % tid_agg_rx->buf_size) {
Johannes Bergfb4ea052016-01-28 16:19:24 +02001239 if (ieee80211_rx_reorder_ready(tid_agg_rx, j))
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001240 break;
1241 }
1242
1243 set_release_timer:
1244
Johannes Berg788211d2015-04-01 14:20:42 +02001245 if (!tid_agg_rx->removed)
1246 mod_timer(&tid_agg_rx->reorder_timer,
1247 tid_agg_rx->reorder_time[j] + 1 +
1248 HT_RX_REORDER_BUF_TIMEOUT);
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001249 } else {
1250 del_timer(&tid_agg_rx->reorder_timer);
1251 }
Christian Lamparteraa0c8632010-08-05 01:36:04 +02001252}
1253
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001254/*
1255 * As this function belongs to the RX path it must be under
1256 * rcu_read_lock protection. It returns false if the frame
1257 * can be processed immediately, true if it was consumed.
1258 */
Johannes Bergd3b2fb52012-06-22 12:48:38 +02001259static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata,
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001260 struct tid_ampdu_rx *tid_agg_rx,
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001261 struct sk_buff *skb,
1262 struct sk_buff_head *frames)
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001263{
1264 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Michal Kazior83eb9352014-07-16 12:09:31 +02001265 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001266 u16 sc = le16_to_cpu(hdr->seq_ctrl);
1267 u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
1268 u16 head_seq_num, buf_size;
1269 int index;
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001270 bool ret = true;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001271
Johannes Bergdd318572010-11-29 11:09:16 +01001272 spin_lock(&tid_agg_rx->reorder_lock);
1273
Michal Kazior4549cf22014-09-02 14:05:10 +02001274 /*
1275 * Offloaded BA sessions have no known starting sequence number so pick
1276 * one from first Rxed frame for this tid after BA was started.
1277 */
1278 if (unlikely(tid_agg_rx->auto_seq)) {
1279 tid_agg_rx->auto_seq = false;
1280 tid_agg_rx->ssn = mpdu_seq_num;
1281 tid_agg_rx->head_seq_num = mpdu_seq_num;
1282 }
1283
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001284 buf_size = tid_agg_rx->buf_size;
1285 head_seq_num = tid_agg_rx->head_seq_num;
1286
Sara Sharonb7540d82017-02-06 15:28:42 +02001287 /*
1288 * If the current MPDU's SN is smaller than the SSN, it shouldn't
1289 * be reordered.
1290 */
1291 if (unlikely(!tid_agg_rx->started)) {
1292 if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) {
1293 ret = false;
1294 goto out;
1295 }
1296 tid_agg_rx->started = true;
1297 }
1298
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001299 /* frame with out of date sequence number */
Johannes Berg9a886582013-02-15 19:25:00 +01001300 if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) {
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001301 dev_kfree_skb(skb);
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001302 goto out;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001303 }
1304
1305 /*
1306 * If frame the sequence number exceeds our buffering window
1307 * size release some previous frames to make room for this one.
1308 */
Johannes Berg9a886582013-02-15 19:25:00 +01001309 if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) {
1310 head_seq_num = ieee80211_sn_inc(
1311 ieee80211_sn_sub(mpdu_seq_num, buf_size));
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001312 /* release stored frames up to new head to stack */
Johannes Bergd3b2fb52012-06-22 12:48:38 +02001313 ieee80211_release_reorder_frames(sdata, tid_agg_rx,
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001314 head_seq_num, frames);
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001315 }
1316
1317 /* Now the new frame is always in the range of the reordering buffer */
1318
Karl Beldan2e3049b2013-10-24 15:53:32 +02001319 index = mpdu_seq_num % tid_agg_rx->buf_size;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001320
1321 /* check if we already stored this frame */
Johannes Bergfb4ea052016-01-28 16:19:24 +02001322 if (ieee80211_rx_reorder_ready(tid_agg_rx, index)) {
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001323 dev_kfree_skb(skb);
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001324 goto out;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001325 }
1326
1327 /*
1328 * If the current MPDU is in the right order and nothing else
1329 * is stored we can process it directly, no need to buffer it.
Johannes Bergc835b212011-03-15 23:17:01 +01001330 * If it is first but there's something stored, we may be able
1331 * to release frames after this one.
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001332 */
1333 if (mpdu_seq_num == tid_agg_rx->head_seq_num &&
1334 tid_agg_rx->stored_mpdu_num == 0) {
Michal Kazior83eb9352014-07-16 12:09:31 +02001335 if (!(status->flag & RX_FLAG_AMSDU_MORE))
1336 tid_agg_rx->head_seq_num =
1337 ieee80211_sn_inc(tid_agg_rx->head_seq_num);
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001338 ret = false;
1339 goto out;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001340 }
1341
1342 /* put the frame in the reordering buffer */
Michal Kazior83eb9352014-07-16 12:09:31 +02001343 __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb);
1344 if (!(status->flag & RX_FLAG_AMSDU_MORE)) {
1345 tid_agg_rx->reorder_time[index] = jiffies;
1346 tid_agg_rx->stored_mpdu_num++;
1347 ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames);
1348 }
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001349
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02001350 out:
1351 spin_unlock(&tid_agg_rx->reorder_lock);
1352 return ret;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001353}
1354
1355/*
1356 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
1357 * true if the MPDU was buffered, false if it should be processed.
1358 */
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001359static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx,
1360 struct sk_buff_head *frames)
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001361{
Johannes Berg2569a822009-11-25 17:46:17 +01001362 struct sk_buff *skb = rx->skb;
1363 struct ieee80211_local *local = rx->local;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001364 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berg2569a822009-11-25 17:46:17 +01001365 struct sta_info *sta = rx->sta;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001366 struct tid_ampdu_rx *tid_agg_rx;
1367 u16 sc;
Thomas Pedersen6cc00d52011-11-03 21:11:11 -07001368 u8 tid, ack_policy;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001369
Johannes Berg051a41fa2013-11-20 11:28:27 +01001370 if (!ieee80211_is_data_qos(hdr->frame_control) ||
1371 is_multicast_ether_addr(hdr->addr1))
Johannes Berg2569a822009-11-25 17:46:17 +01001372 goto dont_reorder;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001373
1374 /*
1375 * filter the QoS data rx stream according to
1376 * STA/TID and check if this STA/TID is on aggregation
1377 */
1378
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001379 if (!sta)
Johannes Berg2569a822009-11-25 17:46:17 +01001380 goto dont_reorder;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001381
Thomas Pedersen6cc00d52011-11-03 21:11:11 -07001382 ack_policy = *ieee80211_get_qos_ctl(hdr) &
1383 IEEE80211_QOS_CTL_ACK_POLICY_MASK;
Sara Sharona1f2ba04c2018-02-19 14:48:40 +02001384 tid = ieee80211_get_tid(hdr);
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001385
Johannes Berga87f7362010-06-10 10:21:38 +02001386 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
Johannes Bergbfe40fa2016-08-29 23:25:18 +03001387 if (!tid_agg_rx) {
1388 if (ack_policy == IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
1389 !test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) &&
1390 !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg))
1391 ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid,
1392 WLAN_BACK_RECIPIENT,
1393 WLAN_REASON_QSTA_REQUIRE_SETUP);
Johannes Berga87f7362010-06-10 10:21:38 +02001394 goto dont_reorder;
Johannes Bergbfe40fa2016-08-29 23:25:18 +03001395 }
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001396
1397 /* qos null data frames are excluded */
1398 if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
Johannes Berga87f7362010-06-10 10:21:38 +02001399 goto dont_reorder;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001400
Thomas Pedersen6cc00d52011-11-03 21:11:11 -07001401 /* not part of a BA session */
1402 if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
1403 ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL)
1404 goto dont_reorder;
1405
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001406 /* new, potentially un-ordered, ampdu frame - process it */
1407
1408 /* reset session timer */
1409 if (tid_agg_rx->timeout)
Felix Fietkau12d3952f2012-03-18 22:58:06 +01001410 tid_agg_rx->last_rx = jiffies;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001411
1412 /* if this mpdu is fragmented - terminate rx aggregation session */
1413 sc = le16_to_cpu(hdr->seq_ctrl);
1414 if (sc & IEEE80211_SCTL_FRAG) {
Johannes Berg344eec62010-06-10 10:21:36 +02001415 skb_queue_tail(&rx->sdata->skb_queue, skb);
1416 ieee80211_queue_work(&local->hw, &rx->sdata->work);
Johannes Berg2569a822009-11-25 17:46:17 +01001417 return;
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001418 }
1419
Johannes Berga87f7362010-06-10 10:21:38 +02001420 /*
1421 * No locking needed -- we will only ever process one
1422 * RX packet at a time, and thus own tid_agg_rx. All
1423 * other code manipulating it needs to (and does) make
1424 * sure that we cannot get to it any more before doing
1425 * anything with it.
1426 */
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001427 if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb,
1428 frames))
Johannes Berg2569a822009-11-25 17:46:17 +01001429 return;
1430
1431 dont_reorder:
Christian Lamparterf9e124f2013-02-04 17:44:44 +00001432 __skb_queue_tail(frames, skb);
Johannes Berg1edfb1a2009-11-25 17:46:16 +01001433}
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001434
Johannes Berg49461622008-06-30 15:10:45 +02001435static ieee80211_rx_result debug_noinline
Johannes Berg03954422014-11-11 16:49:25 +01001436ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx)
Johannes Berg571ecf62007-07-27 15:43:22 +02001437{
Harvey Harrisona7767f92008-07-02 16:30:51 -07001438 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
Johannes Berg554891e2010-09-24 12:38:25 +02001439 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Berg571ecf62007-07-27 15:43:22 +02001440
Sara Sharonf9cfa5f2015-12-08 16:04:33 +02001441 if (status->flag & RX_FLAG_DUP_VALIDATED)
1442 return RX_CONTINUE;
1443
Johannes Berg6b0f3272013-07-11 22:33:26 +02001444 /*
1445 * Drop duplicate 802.11 retransmissions
1446 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
1447 */
Johannes Berg03954422014-11-11 16:49:25 +01001448
1449 if (rx->skb->len < 24)
1450 return RX_CONTINUE;
1451
1452 if (ieee80211_is_ctl(hdr->frame_control) ||
Thomas Pedersen30b2f0b2020-01-13 21:59:40 -08001453 ieee80211_is_any_nullfunc(hdr->frame_control) ||
Johannes Berg03954422014-11-11 16:49:25 +01001454 is_multicast_ether_addr(hdr->addr1))
1455 return RX_CONTINUE;
1456
Johannes Berga732fa72015-10-14 18:27:07 +02001457 if (!rx->sta)
1458 return RX_CONTINUE;
1459
1460 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
1461 rx->sta->last_seq_ctrl[rx->seqno_idx] == hdr->seq_ctrl)) {
1462 I802_DEBUG_INC(rx->local->dot11FrameDuplicateCount);
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001463 rx->sta->rx_stats.num_duplicates++;
Johannes Berga732fa72015-10-14 18:27:07 +02001464 return RX_DROP_UNUSABLE;
1465 } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) {
1466 rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl;
Johannes Berg571ecf62007-07-27 15:43:22 +02001467 }
1468
Johannes Berg03954422014-11-11 16:49:25 +01001469 return RX_CONTINUE;
1470}
1471
1472static ieee80211_rx_result debug_noinline
1473ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
1474{
1475 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
1476
Johannes Berg571ecf62007-07-27 15:43:22 +02001477 /* Drop disallowed frame classes based on STA auth/assoc state;
1478 * IEEE 802.11, Chap 5.5.
1479 *
Johannes Bergccd7b362008-09-11 00:01:56 +02001480 * mac80211 filters only based on association state, i.e. it drops
1481 * Class 3 frames from not associated stations. hostapd sends
Johannes Berg571ecf62007-07-27 15:43:22 +02001482 * deauth/disassoc frames when needed. In addition, hostapd is
1483 * responsible for filtering on both auth and assoc states.
1484 */
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001485
Johannes Berg902acc72008-02-23 15:17:19 +01001486 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001487 return ieee80211_rx_mesh_check(rx);
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001488
Harvey Harrisona7767f92008-07-02 16:30:51 -07001489 if (unlikely((ieee80211_is_data(hdr->frame_control) ||
1490 ieee80211_is_pspoll(hdr->frame_control)) &&
Johannes Berg05c914f2008-09-11 00:01:58 +02001491 rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
Bill Jordan1be7fe82010-10-01 11:20:41 -04001492 rx->sdata->vif.type != NL80211_IFTYPE_WDS &&
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001493 rx->sdata->vif.type != NL80211_IFTYPE_OCB &&
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001494 (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) {
Johannes Berg7852e362012-01-20 13:55:24 +01001495 /*
1496 * accept port control frames from the AP even when it's not
1497 * yet marked ASSOC to prevent a race where we don't set the
1498 * assoc bit quickly enough before it sends the first frame
1499 */
1500 if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
Guy Eilam2a33bee2011-08-17 15:18:15 +03001501 ieee80211_is_data_present(hdr->frame_control)) {
Johannes Berg6dbda2d2012-10-26 00:41:23 +02001502 unsigned int hdrlen;
1503 __be16 ethertype;
Guy Eilam2a33bee2011-08-17 15:18:15 +03001504
Johannes Berg6dbda2d2012-10-26 00:41:23 +02001505 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1506
1507 if (rx->skb->len < hdrlen + 8)
1508 return RX_DROP_MONITOR;
1509
1510 skb_copy_bits(rx->skb, hdrlen + 6, &ethertype, 2);
1511 if (ethertype == rx->sdata->control_port_protocol)
Guy Eilam2a33bee2011-08-17 15:18:15 +03001512 return RX_CONTINUE;
1513 }
Johannes Berg21fc7562011-11-04 11:18:13 +01001514
1515 if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
1516 cfg80211_rx_spurious_frame(rx->sdata->dev,
1517 hdr->addr2,
1518 GFP_ATOMIC))
1519 return RX_DROP_UNUSABLE;
1520
Johannes Berge4c26ad2008-01-31 19:48:21 +01001521 return RX_DROP_MONITOR;
Guy Eilam2a33bee2011-08-17 15:18:15 +03001522 }
Johannes Berg571ecf62007-07-27 15:43:22 +02001523
Johannes Berg9ae54c82008-01-31 19:48:20 +01001524 return RX_CONTINUE;
Johannes Berg570bd532007-07-27 15:43:22 +02001525}
1526
1527
Johannes Berg49461622008-06-30 15:10:45 +02001528static ieee80211_rx_result debug_noinline
Kalle Valo572e0012009-02-10 17:09:31 +02001529ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx)
1530{
1531 struct ieee80211_local *local;
1532 struct ieee80211_hdr *hdr;
1533 struct sk_buff *skb;
1534
1535 local = rx->local;
1536 skb = rx->skb;
1537 hdr = (struct ieee80211_hdr *) skb->data;
1538
1539 if (!local->pspolling)
1540 return RX_CONTINUE;
1541
1542 if (!ieee80211_has_fromds(hdr->frame_control))
1543 /* this is not from AP */
1544 return RX_CONTINUE;
1545
1546 if (!ieee80211_is_data(hdr->frame_control))
1547 return RX_CONTINUE;
1548
1549 if (!ieee80211_has_moredata(hdr->frame_control)) {
1550 /* AP has no more frames buffered for us */
1551 local->pspolling = false;
1552 return RX_CONTINUE;
1553 }
1554
1555 /* more data bit is set, let's request a new frame from the AP */
1556 ieee80211_send_pspoll(local, rx->sdata);
1557
1558 return RX_CONTINUE;
1559}
1560
Marco Porschd012a602012-10-10 12:39:50 -07001561static void sta_ps_start(struct sta_info *sta)
Johannes Berg571ecf62007-07-27 15:43:22 +02001562{
Johannes Berg133b8222008-09-16 14:18:59 +02001563 struct ieee80211_sub_if_data *sdata = sta->sdata;
Christian Lamparter4571d3b2008-11-30 00:48:41 +01001564 struct ieee80211_local *local = sdata->local;
Marco Porschd012a602012-10-10 12:39:50 -07001565 struct ps_data *ps;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001566 int tid;
Joe Perches0795af52007-10-03 17:59:30 -07001567
Marco Porschd012a602012-10-10 12:39:50 -07001568 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1569 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1570 ps = &sdata->bss->ps;
1571 else
1572 return;
1573
1574 atomic_inc(&ps->num_sta_ps);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001575 set_sta_flag(sta, WLAN_STA_PS_STA);
Johannes Berg30686bf2015-06-02 21:39:54 +02001576 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001577 drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001578 ps_dbg(sdata, "STA %pM aid %d enters power save mode\n",
1579 sta->sta.addr, sta->sta.aid);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001580
Johannes Berg17c18bf2015-03-21 15:25:43 +01001581 ieee80211_clear_fast_xmit(sta);
1582
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001583 if (!sta->sta.txq[0])
1584 return;
1585
Johannes Bergadf8ed02018-08-31 11:31:08 +03001586 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
Felix Fietkaub49c15e2019-03-19 12:00:13 +01001587 struct ieee80211_txq *txq = sta->sta.txq[tid];
1588 struct txq_info *txqi = to_txq_info(txq);
1589
1590 spin_lock(&local->active_txq_lock[txq->ac]);
1591 if (!list_empty(&txqi->schedule_order))
1592 list_del_init(&txqi->schedule_order);
1593 spin_unlock(&local->active_txq_lock[txq->ac]);
1594
1595 if (txq_has_queue(txq))
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001596 set_bit(tid, &sta->txq_buffered_tids);
1597 else
1598 clear_bit(tid, &sta->txq_buffered_tids);
1599 }
Johannes Berg571ecf62007-07-27 15:43:22 +02001600}
1601
Marco Porschd012a602012-10-10 12:39:50 -07001602static void sta_ps_end(struct sta_info *sta)
Johannes Berg571ecf62007-07-27 15:43:22 +02001603{
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001604 ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n",
1605 sta->sta.addr, sta->sta.aid);
Johannes Berg004c8722008-02-20 11:21:35 +01001606
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001607 if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
Johannes Berge3685e02014-02-20 11:19:58 +01001608 /*
1609 * Clear the flag only if the other one is still set
1610 * so that the TX path won't start TX'ing new frames
1611 * directly ... In the case that the driver flag isn't
1612 * set ieee80211_sta_ps_deliver_wakeup() will clear it.
1613 */
1614 clear_sta_flag(sta, WLAN_STA_PS_STA);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001615 ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n",
1616 sta->sta.addr, sta->sta.aid);
Johannes Bergaf818582009-11-06 11:35:50 +01001617 return;
1618 }
1619
Johannes Berg5ac2e352014-05-27 16:32:27 +02001620 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1621 clear_sta_flag(sta, WLAN_STA_PS_STA);
Johannes Bergaf818582009-11-06 11:35:50 +01001622 ieee80211_sta_ps_deliver_wakeup(sta);
Johannes Berg571ecf62007-07-27 15:43:22 +02001623}
1624
Johannes Bergcf471612015-06-16 16:16:38 +02001625int ieee80211_sta_ps_transition(struct ieee80211_sta *pubsta, bool start)
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001626{
Johannes Bergcf471612015-06-16 16:16:38 +02001627 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001628 bool in_ps;
1629
Johannes Bergcf471612015-06-16 16:16:38 +02001630 WARN_ON(!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS));
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001631
1632 /* Don't let the same PS state be set twice */
Johannes Bergcf471612015-06-16 16:16:38 +02001633 in_ps = test_sta_flag(sta, WLAN_STA_PS_STA);
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001634 if ((start && in_ps) || (!start && !in_ps))
1635 return -EINVAL;
1636
1637 if (start)
Johannes Bergcf471612015-06-16 16:16:38 +02001638 sta_ps_start(sta);
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001639 else
Johannes Bergcf471612015-06-16 16:16:38 +02001640 sta_ps_end(sta);
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001641
1642 return 0;
1643}
1644EXPORT_SYMBOL(ieee80211_sta_ps_transition);
1645
Johannes Berg46fa38e2016-05-03 16:58:00 +03001646void ieee80211_sta_pspoll(struct ieee80211_sta *pubsta)
1647{
1648 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1649
1650 if (test_sta_flag(sta, WLAN_STA_SP))
1651 return;
1652
1653 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1654 ieee80211_sta_ps_deliver_poll_response(sta);
1655 else
1656 set_sta_flag(sta, WLAN_STA_PSPOLL);
1657}
1658EXPORT_SYMBOL(ieee80211_sta_pspoll);
1659
1660void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *pubsta, u8 tid)
1661{
1662 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
Amadeusz Sławiński731977e2017-01-24 16:42:10 +01001663 int ac = ieee80211_ac_from_tid(tid);
Johannes Berg46fa38e2016-05-03 16:58:00 +03001664
1665 /*
Emmanuel Grumbach0aa419e2016-10-18 23:12:10 +03001666 * If this AC is not trigger-enabled do nothing unless the
1667 * driver is calling us after it already checked.
Johannes Berg46fa38e2016-05-03 16:58:00 +03001668 *
1669 * NB: This could/should check a separate bitmap of trigger-
1670 * enabled queues, but for now we only implement uAPSD w/o
1671 * TSPEC changes to the ACs, so they're always the same.
1672 */
Emmanuel Grumbachf438ceb2016-10-18 23:12:12 +03001673 if (!(sta->sta.uapsd_queues & ieee80211_ac_to_qos_mask[ac]) &&
1674 tid != IEEE80211_NUM_TIDS)
Johannes Berg46fa38e2016-05-03 16:58:00 +03001675 return;
1676
1677 /* if we are in a service period, do nothing */
1678 if (test_sta_flag(sta, WLAN_STA_SP))
1679 return;
1680
1681 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1682 ieee80211_sta_ps_deliver_uapsd(sta);
1683 else
1684 set_sta_flag(sta, WLAN_STA_UAPSD);
1685}
1686EXPORT_SYMBOL(ieee80211_sta_uapsd_trigger);
1687
Johannes Berg49461622008-06-30 15:10:45 +02001688static ieee80211_rx_result debug_noinline
Johannes Berg47086fc2011-09-29 16:04:33 +02001689ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
1690{
1691 struct ieee80211_sub_if_data *sdata = rx->sdata;
1692 struct ieee80211_hdr *hdr = (void *)rx->skb->data;
1693 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Berg47086fc2011-09-29 16:04:33 +02001694
Johannes Berg5c900672015-04-22 14:48:34 +02001695 if (!rx->sta)
Johannes Berg47086fc2011-09-29 16:04:33 +02001696 return RX_CONTINUE;
1697
1698 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1699 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
1700 return RX_CONTINUE;
1701
1702 /*
1703 * The device handles station powersave, so don't do anything about
1704 * uAPSD and PS-Poll frames (the latter shouldn't even come up from
1705 * it to mac80211 since they're handled.)
1706 */
Johannes Berg30686bf2015-06-02 21:39:54 +02001707 if (ieee80211_hw_check(&sdata->local->hw, AP_LINK_PS))
Johannes Berg47086fc2011-09-29 16:04:33 +02001708 return RX_CONTINUE;
1709
1710 /*
1711 * Don't do anything if the station isn't already asleep. In
1712 * the uAPSD case, the station will probably be marked asleep,
1713 * in the PS-Poll case the station must be confused ...
1714 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001715 if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA))
Johannes Berg47086fc2011-09-29 16:04:33 +02001716 return RX_CONTINUE;
1717
1718 if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) {
Johannes Berg46fa38e2016-05-03 16:58:00 +03001719 ieee80211_sta_pspoll(&rx->sta->sta);
Johannes Berg47086fc2011-09-29 16:04:33 +02001720
1721 /* Free PS Poll skb here instead of returning RX_DROP that would
1722 * count as an dropped frame. */
1723 dev_kfree_skb(rx->skb);
1724
1725 return RX_QUEUED;
1726 } else if (!ieee80211_has_morefrags(hdr->frame_control) &&
1727 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
1728 ieee80211_has_pm(hdr->frame_control) &&
1729 (ieee80211_is_data_qos(hdr->frame_control) ||
1730 ieee80211_is_qos_nullfunc(hdr->frame_control))) {
Sara Sharona1f2ba04c2018-02-19 14:48:40 +02001731 u8 tid = ieee80211_get_tid(hdr);
Johannes Berg47086fc2011-09-29 16:04:33 +02001732
Johannes Berg46fa38e2016-05-03 16:58:00 +03001733 ieee80211_sta_uapsd_trigger(&rx->sta->sta, tid);
Johannes Berg47086fc2011-09-29 16:04:33 +02001734 }
1735
1736 return RX_CONTINUE;
1737}
1738
1739static ieee80211_rx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +01001740ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
Johannes Berg571ecf62007-07-27 15:43:22 +02001741{
1742 struct sta_info *sta = rx->sta;
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01001743 struct sk_buff *skb = rx->skb;
1744 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1745 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
Felix Fietkauef0621e2013-04-22 16:29:31 +02001746 int i;
Johannes Berg571ecf62007-07-27 15:43:22 +02001747
1748 if (!sta)
Johannes Berg9ae54c82008-01-31 19:48:20 +01001749 return RX_CONTINUE;
Johannes Berg571ecf62007-07-27 15:43:22 +02001750
Johannes Bergb291ba12009-07-10 15:29:03 +02001751 /*
1752 * Update last_rx only for IBSS packets which are for the current
Antonio Quartullie584da5e2012-11-25 23:13:42 +01001753 * BSSID and for station already AUTHORIZED to avoid keeping the
1754 * current IBSS network alive in cases where other STAs start
1755 * using different BSSID. This will also give the station another
1756 * chance to restart the authentication/authorization in case
1757 * something went wrong the first time.
Johannes Bergb291ba12009-07-10 15:29:03 +02001758 */
Johannes Berg05c914f2008-09-11 00:01:58 +02001759 if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Ron Rindjunsky71364712007-12-25 17:00:36 +02001760 u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len,
Johannes Berg05c914f2008-09-11 00:01:58 +02001761 NL80211_IFTYPE_ADHOC);
Antonio Quartullie584da5e2012-11-25 23:13:42 +01001762 if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) &&
1763 test_sta_flag(sta, WLAN_STA_AUTHORIZED)) {
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001764 sta->rx_stats.last_rx = jiffies;
Henning Roggef4ebddf2014-05-01 10:03:46 +02001765 if (ieee80211_is_data(hdr->frame_control) &&
Johannes Berg4f6b1b32016-03-31 20:02:08 +03001766 !is_multicast_ether_addr(hdr->addr1))
1767 sta->rx_stats.last_rate =
1768 sta_stats_encode_rate(status);
Felix Fietkau3af63342011-02-27 22:08:01 +01001769 }
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001770 } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) {
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001771 sta->rx_stats.last_rx = jiffies;
Johannes Bergb291ba12009-07-10 15:29:03 +02001772 } else if (!is_multicast_ether_addr(hdr->addr1)) {
1773 /*
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001774 * Mesh beacons will update last_rx when if they are found to
1775 * match the current local configuration when processed.
Johannes Berg571ecf62007-07-27 15:43:22 +02001776 */
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001777 sta->rx_stats.last_rx = jiffies;
Johannes Berg4f6b1b32016-03-31 20:02:08 +03001778 if (ieee80211_is_data(hdr->frame_control))
1779 sta->rx_stats.last_rate = sta_stats_encode_rate(status);
Johannes Berg571ecf62007-07-27 15:43:22 +02001780 }
1781
Kalle Valo3cf335d52009-03-22 21:57:06 +02001782 if (rx->sdata->vif.type == NL80211_IFTYPE_STATION)
1783 ieee80211_sta_rx_notify(rx->sdata, hdr);
1784
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001785 sta->rx_stats.fragments++;
Johannes Berg0f9c5a62016-03-31 20:02:09 +03001786
1787 u64_stats_update_begin(&rx->sta->rx_stats.syncp);
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001788 sta->rx_stats.bytes += rx->skb->len;
Johannes Berg0f9c5a62016-03-31 20:02:09 +03001789 u64_stats_update_end(&rx->sta->rx_stats.syncp);
1790
Felix Fietkaufe8431f2012-03-01 18:00:07 +01001791 if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001792 sta->rx_stats.last_signal = status->signal;
Johannes Berg0be6ed12016-03-31 20:02:05 +03001793 ewma_signal_add(&sta->rx_stats_avg.signal, -status->signal);
Felix Fietkaufe8431f2012-03-01 18:00:07 +01001794 }
Johannes Berg571ecf62007-07-27 15:43:22 +02001795
Felix Fietkauef0621e2013-04-22 16:29:31 +02001796 if (status->chains) {
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001797 sta->rx_stats.chains = status->chains;
Felix Fietkauef0621e2013-04-22 16:29:31 +02001798 for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) {
1799 int signal = status->chain_signal[i];
1800
1801 if (!(status->chains & BIT(i)))
1802 continue;
1803
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001804 sta->rx_stats.chain_signal_last[i] = signal;
Johannes Berg0be6ed12016-03-31 20:02:05 +03001805 ewma_signal_add(&sta->rx_stats_avg.chain_signal[i],
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001806 -signal);
Felix Fietkauef0621e2013-04-22 16:29:31 +02001807 }
1808 }
1809
Johannes Berg72eaa432008-11-26 15:02:58 +01001810 /*
1811 * Change STA power saving mode only at the end of a frame
Emmanuel Grumbach9fef6542017-10-29 11:51:07 +02001812 * exchange sequence, and only for a data or management
1813 * frame as specified in IEEE 802.11-2016 11.2.3.2
Johannes Berg72eaa432008-11-26 15:02:58 +01001814 */
Johannes Berg30686bf2015-06-02 21:39:54 +02001815 if (!ieee80211_hw_check(&sta->local->hw, AP_LINK_PS) &&
Arik Nemtsovd057e5a2011-01-31 22:29:13 +02001816 !ieee80211_has_morefrags(hdr->frame_control) &&
Emmanuel Grumbach20932752018-08-20 13:56:07 +03001817 !is_multicast_ether_addr(hdr->addr1) &&
Emmanuel Grumbach9fef6542017-10-29 11:51:07 +02001818 (ieee80211_is_mgmt(hdr->frame_control) ||
1819 ieee80211_is_data(hdr->frame_control)) &&
Christian Lamparter4cfda472010-12-27 23:21:26 +01001820 !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
Johannes Berg05c914f2008-09-11 00:01:58 +02001821 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
Emmanuel Grumbach9fef6542017-10-29 11:51:07 +02001822 rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001823 if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
Johannes Bergb4ba5442014-01-24 14:41:44 +01001824 if (!ieee80211_has_pm(hdr->frame_control))
Marco Porschd012a602012-10-10 12:39:50 -07001825 sta_ps_end(sta);
Johannes Berg72eaa432008-11-26 15:02:58 +01001826 } else {
1827 if (ieee80211_has_pm(hdr->frame_control))
Marco Porschd012a602012-10-10 12:39:50 -07001828 sta_ps_start(sta);
Johannes Berg72eaa432008-11-26 15:02:58 +01001829 }
Johannes Berg571ecf62007-07-27 15:43:22 +02001830 }
1831
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001832 /* mesh power save support */
1833 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
1834 ieee80211_mps_rx_h_sta_process(sta, hdr);
1835
Johannes Berg22403de2009-10-30 12:55:03 +01001836 /*
1837 * Drop (qos-)data::nullfunc frames silently, since they
1838 * are used only to control station power saving mode.
1839 */
Thomas Pedersen30b2f0b2020-01-13 21:59:40 -08001840 if (ieee80211_is_any_nullfunc(hdr->frame_control)) {
Johannes Berg571ecf62007-07-27 15:43:22 +02001841 I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc);
Felix Fietkaud5242152010-01-08 18:06:26 +01001842
1843 /*
1844 * If we receive a 4-addr nullfunc frame from a STA
Johannes Berge7f4a942011-11-04 11:18:20 +01001845 * that was not moved to a 4-addr STA vlan yet send
1846 * the event to userspace and for older hostapd drop
1847 * the frame to the monitor interface.
Felix Fietkaud5242152010-01-08 18:06:26 +01001848 */
1849 if (ieee80211_has_a4(hdr->frame_control) &&
1850 (rx->sdata->vif.type == NL80211_IFTYPE_AP ||
1851 (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
Johannes Berge7f4a942011-11-04 11:18:20 +01001852 !rx->sdata->u.vlan.sta))) {
1853 if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT))
1854 cfg80211_rx_unexpected_4addr_frame(
1855 rx->sdata->dev, sta->sta.addr,
1856 GFP_ATOMIC);
Felix Fietkaud5242152010-01-08 18:06:26 +01001857 return RX_DROP_MONITOR;
Johannes Berge7f4a942011-11-04 11:18:20 +01001858 }
Johannes Berg22403de2009-10-30 12:55:03 +01001859 /*
1860 * Update counter and free packet here to avoid
1861 * counting this as a dropped packed.
1862 */
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001863 sta->rx_stats.packets++;
Johannes Berg571ecf62007-07-27 15:43:22 +02001864 dev_kfree_skb(rx->skb);
Johannes Berg9ae54c82008-01-31 19:48:20 +01001865 return RX_QUEUED;
Johannes Berg571ecf62007-07-27 15:43:22 +02001866 }
1867
Johannes Berg9ae54c82008-01-31 19:48:20 +01001868 return RX_CONTINUE;
Johannes Berg571ecf62007-07-27 15:43:22 +02001869} /* ieee80211_rx_h_sta_process */
1870
Johan Almbladh86c228a2013-08-14 15:29:46 +02001871static ieee80211_rx_result debug_noinline
1872ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
1873{
1874 struct sk_buff *skb = rx->skb;
1875 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1876 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1877 int keyidx;
Johan Almbladh86c228a2013-08-14 15:29:46 +02001878 ieee80211_rx_result result = RX_DROP_UNUSABLE;
1879 struct ieee80211_key *sta_ptk = NULL;
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001880 struct ieee80211_key *ptk_idx = NULL;
Johan Almbladh86c228a2013-08-14 15:29:46 +02001881 int mmie_keyidx = -1;
1882 __le16 fc;
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001883 const struct ieee80211_cipher_scheme *cs = NULL;
Johan Almbladh86c228a2013-08-14 15:29:46 +02001884
1885 /*
1886 * Key selection 101
1887 *
1888 * There are four types of keys:
1889 * - GTK (group keys)
1890 * - IGTK (group keys for management frames)
1891 * - PTK (pairwise keys)
1892 * - STK (station-to-station pairwise keys)
1893 *
1894 * When selecting a key, we have to distinguish between multicast
1895 * (including broadcast) and unicast frames, the latter can only
1896 * use PTKs and STKs while the former always use GTKs and IGTKs.
1897 * Unless, of course, actual WEP keys ("pre-RSNA") are used, then
1898 * unicast frames can also use key indices like GTKs. Hence, if we
1899 * don't have a PTK/STK we check the key index for a WEP key.
1900 *
1901 * Note that in a regular BSS, multicast frames are sent by the
1902 * AP only, associated stations unicast the frame to the AP first
1903 * which then multicasts it on their behalf.
1904 *
1905 * There is also a slight problem in IBSS mode: GTKs are negotiated
1906 * with each station, that is something we don't currently handle.
1907 * The spec seems to expect that one negotiates the same key with
1908 * every station but there's no such requirement; VLANs could be
1909 * possible.
1910 */
1911
Johan Almbladh86c228a2013-08-14 15:29:46 +02001912 /* start without a key */
1913 rx->key = NULL;
Johan Almbladh86c228a2013-08-14 15:29:46 +02001914 fc = hdr->frame_control;
1915
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001916 if (rx->sta) {
1917 int keyid = rx->sta->ptk_idx;
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001918 sta_ptk = rcu_dereference(rx->sta->ptk[keyid]);
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001919
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001920 if (ieee80211_has_protected(fc)) {
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001921 cs = rx->sta->cipher_scheme;
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001922 keyid = ieee80211_get_keyid(rx->skb, cs);
1923
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001924 if (unlikely(keyid < 0))
1925 return RX_DROP_UNUSABLE;
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001926
1927 ptk_idx = rcu_dereference(rx->sta->ptk[keyid]);
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001928 }
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001929 }
1930
Johan Almbladh86c228a2013-08-14 15:29:46 +02001931 if (!ieee80211_has_protected(fc))
1932 mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb);
1933
1934 if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) {
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01001935 rx->key = ptk_idx ? ptk_idx : sta_ptk;
Johan Almbladh86c228a2013-08-14 15:29:46 +02001936 if ((status->flag & RX_FLAG_DECRYPTED) &&
1937 (status->flag & RX_FLAG_IV_STRIPPED))
1938 return RX_CONTINUE;
1939 /* Skip decryption if the frame is not protected. */
1940 if (!ieee80211_has_protected(fc))
1941 return RX_CONTINUE;
1942 } else if (mmie_keyidx >= 0) {
1943 /* Broadcast/multicast robust management frame / BIP */
1944 if ((status->flag & RX_FLAG_DECRYPTED) &&
1945 (status->flag & RX_FLAG_IV_STRIPPED))
1946 return RX_CONTINUE;
1947
1948 if (mmie_keyidx < NUM_DEFAULT_KEYS ||
1949 mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
1950 return RX_DROP_MONITOR; /* unexpected BIP keyidx */
Masashi Honma46f6b062016-06-22 19:55:20 +09001951 if (rx->sta) {
1952 if (ieee80211_is_group_privacy_action(skb) &&
1953 test_sta_flag(rx->sta, WLAN_STA_MFP))
1954 return RX_DROP_MONITOR;
1955
Johan Almbladh86c228a2013-08-14 15:29:46 +02001956 rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]);
Masashi Honma46f6b062016-06-22 19:55:20 +09001957 }
Johan Almbladh86c228a2013-08-14 15:29:46 +02001958 if (!rx->key)
1959 rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]);
1960 } else if (!ieee80211_has_protected(fc)) {
1961 /*
1962 * The frame was not protected, so skip decryption. However, we
1963 * need to set rx->key if there is a key that could have been
1964 * used so that the frame may be dropped if encryption would
1965 * have been expected.
1966 */
1967 struct ieee80211_key *key = NULL;
1968 struct ieee80211_sub_if_data *sdata = rx->sdata;
1969 int i;
1970
1971 if (ieee80211_is_mgmt(fc) &&
1972 is_multicast_ether_addr(hdr->addr1) &&
1973 (key = rcu_dereference(rx->sdata->default_mgmt_key)))
1974 rx->key = key;
1975 else {
1976 if (rx->sta) {
1977 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
1978 key = rcu_dereference(rx->sta->gtk[i]);
1979 if (key)
1980 break;
1981 }
1982 }
1983 if (!key) {
1984 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
1985 key = rcu_dereference(sdata->keys[i]);
1986 if (key)
1987 break;
1988 }
1989 }
1990 if (key)
1991 rx->key = key;
1992 }
1993 return RX_CONTINUE;
1994 } else {
Johan Almbladh86c228a2013-08-14 15:29:46 +02001995 /*
1996 * The device doesn't give us the IV so we won't be
1997 * able to look up the key. That's ok though, we
1998 * don't need to decrypt the frame, we just won't
1999 * be able to keep statistics accurate.
2000 * Except for key threshold notifications, should
2001 * we somehow allow the driver to tell us which key
2002 * the hardware used if this flag is set?
2003 */
2004 if ((status->flag & RX_FLAG_DECRYPTED) &&
2005 (status->flag & RX_FLAG_IV_STRIPPED))
2006 return RX_CONTINUE;
2007
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01002008 keyidx = ieee80211_get_keyid(rx->skb, cs);
Johan Almbladh86c228a2013-08-14 15:29:46 +02002009
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01002010 if (unlikely(keyidx < 0))
2011 return RX_DROP_UNUSABLE;
Johan Almbladh86c228a2013-08-14 15:29:46 +02002012
2013 /* check per-station GTK first, if multicast packet */
2014 if (is_multicast_ether_addr(hdr->addr1) && rx->sta)
2015 rx->key = rcu_dereference(rx->sta->gtk[keyidx]);
2016
2017 /* if not found, try default key */
2018 if (!rx->key) {
2019 rx->key = rcu_dereference(rx->sdata->keys[keyidx]);
2020
2021 /*
2022 * RSNA-protected unicast frames should always be
2023 * sent with pairwise or station-to-station keys,
2024 * but for WEP we allow using a key index as well.
2025 */
2026 if (rx->key &&
2027 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 &&
2028 rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 &&
2029 !is_multicast_ether_addr(hdr->addr1))
2030 rx->key = NULL;
2031 }
2032 }
2033
2034 if (rx->key) {
2035 if (unlikely(rx->key->flags & KEY_FLAG_TAINTED))
2036 return RX_DROP_MONITOR;
2037
Johan Almbladh86c228a2013-08-14 15:29:46 +02002038 /* TODO: add threshold stuff again */
2039 } else {
2040 return RX_DROP_MONITOR;
2041 }
2042
2043 switch (rx->key->conf.cipher) {
2044 case WLAN_CIPHER_SUITE_WEP40:
2045 case WLAN_CIPHER_SUITE_WEP104:
2046 result = ieee80211_crypto_wep_decrypt(rx);
2047 break;
2048 case WLAN_CIPHER_SUITE_TKIP:
2049 result = ieee80211_crypto_tkip_decrypt(rx);
2050 break;
2051 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +02002052 result = ieee80211_crypto_ccmp_decrypt(
2053 rx, IEEE80211_CCMP_MIC_LEN);
2054 break;
2055 case WLAN_CIPHER_SUITE_CCMP_256:
2056 result = ieee80211_crypto_ccmp_decrypt(
2057 rx, IEEE80211_CCMP_256_MIC_LEN);
Johan Almbladh86c228a2013-08-14 15:29:46 +02002058 break;
2059 case WLAN_CIPHER_SUITE_AES_CMAC:
2060 result = ieee80211_crypto_aes_cmac_decrypt(rx);
2061 break;
Jouni Malinen56c52da2015-01-24 19:52:08 +02002062 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2063 result = ieee80211_crypto_aes_cmac_256_decrypt(rx);
2064 break;
Jouni Malinen8ade5382015-01-24 19:52:09 +02002065 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2066 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2067 result = ieee80211_crypto_aes_gmac_decrypt(rx);
2068 break;
Jouni Malinen00b9cfa2015-01-24 19:52:06 +02002069 case WLAN_CIPHER_SUITE_GCMP:
2070 case WLAN_CIPHER_SUITE_GCMP_256:
2071 result = ieee80211_crypto_gcmp_decrypt(rx);
2072 break;
Johan Almbladh86c228a2013-08-14 15:29:46 +02002073 default:
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002074 result = ieee80211_crypto_hw_decrypt(rx);
Johan Almbladh86c228a2013-08-14 15:29:46 +02002075 }
2076
2077 /* the hdr variable is invalid after the decrypt handlers */
2078
2079 /* either the frame has been decrypted or will be dropped */
2080 status->flag |= RX_FLAG_DECRYPTED;
2081
2082 return result;
2083}
2084
Johannes Berg571ecf62007-07-27 15:43:22 +02002085static inline struct ieee80211_fragment_entry *
2086ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata,
2087 unsigned int frag, unsigned int seq, int rx_queue,
2088 struct sk_buff **skb)
2089{
2090 struct ieee80211_fragment_entry *entry;
Johannes Berg571ecf62007-07-27 15:43:22 +02002091
Johannes Berg571ecf62007-07-27 15:43:22 +02002092 entry = &sdata->fragments[sdata->fragment_next++];
2093 if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX)
2094 sdata->fragment_next = 0;
2095
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002096 if (!skb_queue_empty(&entry->skb_list))
Johannes Berg571ecf62007-07-27 15:43:22 +02002097 __skb_queue_purge(&entry->skb_list);
Johannes Berg571ecf62007-07-27 15:43:22 +02002098
2099 __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */
2100 *skb = NULL;
2101 entry->first_frag_time = jiffies;
2102 entry->seq = seq;
2103 entry->rx_queue = rx_queue;
2104 entry->last_frag = frag;
Johannes Berg9acc54b2016-02-26 22:13:40 +01002105 entry->check_sequential_pn = false;
Johannes Berg571ecf62007-07-27 15:43:22 +02002106 entry->extra_len = 0;
2107
2108 return entry;
2109}
2110
2111static inline struct ieee80211_fragment_entry *
2112ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
Harvey Harrisonb73d70a2008-07-15 18:44:12 -07002113 unsigned int frag, unsigned int seq,
Johannes Berg571ecf62007-07-27 15:43:22 +02002114 int rx_queue, struct ieee80211_hdr *hdr)
2115{
2116 struct ieee80211_fragment_entry *entry;
2117 int i, idx;
2118
2119 idx = sdata->fragment_next;
2120 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
2121 struct ieee80211_hdr *f_hdr;
David S. Miller7957a9d2018-08-06 22:49:13 -07002122 struct sk_buff *f_skb;
Johannes Berg571ecf62007-07-27 15:43:22 +02002123
2124 idx--;
2125 if (idx < 0)
2126 idx = IEEE80211_FRAGMENT_MAX - 1;
2127
2128 entry = &sdata->fragments[idx];
2129 if (skb_queue_empty(&entry->skb_list) || entry->seq != seq ||
2130 entry->rx_queue != rx_queue ||
2131 entry->last_frag + 1 != frag)
2132 continue;
2133
David S. Miller7957a9d2018-08-06 22:49:13 -07002134 f_skb = __skb_peek(&entry->skb_list);
2135 f_hdr = (struct ieee80211_hdr *) f_skb->data;
Johannes Berg571ecf62007-07-27 15:43:22 +02002136
Harvey Harrisonb73d70a2008-07-15 18:44:12 -07002137 /*
2138 * Check ftype and addresses are equal, else check next fragment
2139 */
2140 if (((hdr->frame_control ^ f_hdr->frame_control) &
2141 cpu_to_le16(IEEE80211_FCTL_FTYPE)) ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002142 !ether_addr_equal(hdr->addr1, f_hdr->addr1) ||
2143 !ether_addr_equal(hdr->addr2, f_hdr->addr2))
Johannes Berg571ecf62007-07-27 15:43:22 +02002144 continue;
2145
S.Çağlar Onurab466232008-02-14 17:36:47 +02002146 if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
Johannes Berg571ecf62007-07-27 15:43:22 +02002147 __skb_queue_purge(&entry->skb_list);
2148 continue;
2149 }
2150 return entry;
2151 }
2152
2153 return NULL;
2154}
2155
Johannes Berg49461622008-06-30 15:10:45 +02002156static ieee80211_rx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +01002157ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
Johannes Berg571ecf62007-07-27 15:43:22 +02002158{
2159 struct ieee80211_hdr *hdr;
2160 u16 sc;
Harvey Harrison358c8d92008-07-15 18:44:13 -07002161 __le16 fc;
Johannes Berg571ecf62007-07-27 15:43:22 +02002162 unsigned int frag, seq;
2163 struct ieee80211_fragment_entry *entry;
2164 struct sk_buff *skb;
2165
Harvey Harrisonb73d70a2008-07-15 18:44:12 -07002166 hdr = (struct ieee80211_hdr *)rx->skb->data;
Harvey Harrison358c8d92008-07-15 18:44:13 -07002167 fc = hdr->frame_control;
Javier Cardonaf7fbf702012-10-25 11:10:18 -07002168
2169 if (ieee80211_is_ctl(fc))
2170 return RX_CONTINUE;
2171
Johannes Berg571ecf62007-07-27 15:43:22 +02002172 sc = le16_to_cpu(hdr->seq_ctrl);
2173 frag = sc & IEEE80211_SCTL_FRAG;
2174
Johannes Bergb8fff402014-11-03 13:57:46 +01002175 if (is_multicast_ether_addr(hdr->addr1)) {
Johannes Bergc206ca62015-04-22 20:47:28 +02002176 I802_DEBUG_INC(rx->local->dot11MulticastReceivedFrameCount);
Andreas Müllerd0259332014-12-12 12:11:11 +01002177 goto out_no_led;
Johannes Berg571ecf62007-07-27 15:43:22 +02002178 }
Johannes Bergb8fff402014-11-03 13:57:46 +01002179
Andreas Müllerd0259332014-12-12 12:11:11 +01002180 if (likely(!ieee80211_has_morefrags(fc) && frag == 0))
2181 goto out;
2182
Johannes Berg571ecf62007-07-27 15:43:22 +02002183 I802_DEBUG_INC(rx->local->rx_handlers_fragments);
2184
Zhu Yie3cf8b3f2010-03-29 17:35:07 +08002185 if (skb_linearize(rx->skb))
2186 return RX_DROP_UNUSABLE;
2187
Abhijeet Kolekar058897a2010-05-11 11:22:11 -07002188 /*
2189 * skb_linearize() might change the skb->data and
2190 * previously cached variables (in this case, hdr) need to
2191 * be refreshed with the new data.
2192 */
2193 hdr = (struct ieee80211_hdr *)rx->skb->data;
Johannes Berg571ecf62007-07-27 15:43:22 +02002194 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2195
2196 if (frag == 0) {
2197 /* This is the first fragment of a new frame. */
2198 entry = ieee80211_reassemble_add(rx->sdata, frag, seq,
Johannes Berg9e262972011-07-07 18:45:03 +02002199 rx->seqno_idx, &(rx->skb));
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +02002200 if (rx->key &&
2201 (rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP ||
Johannes Berg9acc54b2016-02-26 22:13:40 +01002202 rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP_256 ||
2203 rx->key->conf.cipher == WLAN_CIPHER_SUITE_GCMP ||
2204 rx->key->conf.cipher == WLAN_CIPHER_SUITE_GCMP_256) &&
Harvey Harrison358c8d92008-07-15 18:44:13 -07002205 ieee80211_has_protected(fc)) {
Johannes Berg9e262972011-07-07 18:45:03 +02002206 int queue = rx->security_idx;
Johannes Berg9acc54b2016-02-26 22:13:40 +01002207
2208 /* Store CCMP/GCMP PN so that we can verify that the
2209 * next fragment has a sequential PN value.
2210 */
2211 entry->check_sequential_pn = true;
Johannes Berg571ecf62007-07-27 15:43:22 +02002212 memcpy(entry->last_pn,
Jouni Malinen91902522010-06-11 10:27:33 -07002213 rx->key->u.ccmp.rx_pn[queue],
Johannes Berg4325f6c2013-05-08 13:09:08 +02002214 IEEE80211_CCMP_PN_LEN);
Johannes Berg9acc54b2016-02-26 22:13:40 +01002215 BUILD_BUG_ON(offsetof(struct ieee80211_key,
2216 u.ccmp.rx_pn) !=
2217 offsetof(struct ieee80211_key,
2218 u.gcmp.rx_pn));
2219 BUILD_BUG_ON(sizeof(rx->key->u.ccmp.rx_pn[queue]) !=
2220 sizeof(rx->key->u.gcmp.rx_pn[queue]));
2221 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN !=
2222 IEEE80211_GCMP_PN_LEN);
Johannes Berg571ecf62007-07-27 15:43:22 +02002223 }
Johannes Berg9ae54c82008-01-31 19:48:20 +01002224 return RX_QUEUED;
Johannes Berg571ecf62007-07-27 15:43:22 +02002225 }
2226
2227 /* This is a fragment for a frame that should already be pending in
2228 * fragment cache. Add this fragment to the end of the pending entry.
2229 */
Johannes Berg9e262972011-07-07 18:45:03 +02002230 entry = ieee80211_reassemble_find(rx->sdata, frag, seq,
2231 rx->seqno_idx, hdr);
Johannes Berg571ecf62007-07-27 15:43:22 +02002232 if (!entry) {
2233 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
Johannes Berge4c26ad2008-01-31 19:48:21 +01002234 return RX_DROP_MONITOR;
Johannes Berg571ecf62007-07-27 15:43:22 +02002235 }
2236
Johannes Berg9acc54b2016-02-26 22:13:40 +01002237 /* "The receiver shall discard MSDUs and MMPDUs whose constituent
2238 * MPDU PN values are not incrementing in steps of 1."
2239 * see IEEE P802.11-REVmc/D5.0, 12.5.3.4.4, item d (for CCMP)
2240 * and IEEE P802.11-REVmc/D5.0, 12.5.5.4.4, item d (for GCMP)
2241 */
2242 if (entry->check_sequential_pn) {
Johannes Berg571ecf62007-07-27 15:43:22 +02002243 int i;
Johannes Berg4325f6c2013-05-08 13:09:08 +02002244 u8 pn[IEEE80211_CCMP_PN_LEN], *rpn;
Jouni Malinen91902522010-06-11 10:27:33 -07002245 int queue;
Johannes Berg9acc54b2016-02-26 22:13:40 +01002246
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +02002247 if (!rx->key ||
2248 (rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP &&
Johannes Berg9acc54b2016-02-26 22:13:40 +01002249 rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP_256 &&
2250 rx->key->conf.cipher != WLAN_CIPHER_SUITE_GCMP &&
2251 rx->key->conf.cipher != WLAN_CIPHER_SUITE_GCMP_256))
Johannes Berge4c26ad2008-01-31 19:48:21 +01002252 return RX_DROP_UNUSABLE;
Johannes Berg4325f6c2013-05-08 13:09:08 +02002253 memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN);
2254 for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) {
Johannes Berg571ecf62007-07-27 15:43:22 +02002255 pn[i]++;
2256 if (pn[i])
2257 break;
2258 }
Johannes Berg9e262972011-07-07 18:45:03 +02002259 queue = rx->security_idx;
Jouni Malinen91902522010-06-11 10:27:33 -07002260 rpn = rx->key->u.ccmp.rx_pn[queue];
Johannes Berg4325f6c2013-05-08 13:09:08 +02002261 if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN))
Johannes Berge4c26ad2008-01-31 19:48:21 +01002262 return RX_DROP_UNUSABLE;
Johannes Berg4325f6c2013-05-08 13:09:08 +02002263 memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN);
Johannes Berg571ecf62007-07-27 15:43:22 +02002264 }
2265
Harvey Harrison358c8d92008-07-15 18:44:13 -07002266 skb_pull(rx->skb, ieee80211_hdrlen(fc));
Johannes Berg571ecf62007-07-27 15:43:22 +02002267 __skb_queue_tail(&entry->skb_list, rx->skb);
2268 entry->last_frag = frag;
2269 entry->extra_len += rx->skb->len;
Harvey Harrison358c8d92008-07-15 18:44:13 -07002270 if (ieee80211_has_morefrags(fc)) {
Johannes Berg571ecf62007-07-27 15:43:22 +02002271 rx->skb = NULL;
Johannes Berg9ae54c82008-01-31 19:48:20 +01002272 return RX_QUEUED;
Johannes Berg571ecf62007-07-27 15:43:22 +02002273 }
2274
2275 rx->skb = __skb_dequeue(&entry->skb_list);
2276 if (skb_tailroom(rx->skb) < entry->extra_len) {
Johannes Bergf1160432015-04-22 20:25:20 +02002277 I802_DEBUG_INC(rx->local->rx_expand_skb_head_defrag);
Johannes Berg571ecf62007-07-27 15:43:22 +02002278 if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len,
2279 GFP_ATOMIC))) {
2280 I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
2281 __skb_queue_purge(&entry->skb_list);
Johannes Berge4c26ad2008-01-31 19:48:21 +01002282 return RX_DROP_UNUSABLE;
Johannes Berg571ecf62007-07-27 15:43:22 +02002283 }
2284 }
2285 while ((skb = __skb_dequeue(&entry->skb_list))) {
Johannes Berg59ae1d12017-06-16 14:29:20 +02002286 skb_put_data(rx->skb, skb->data, skb->len);
Johannes Berg571ecf62007-07-27 15:43:22 +02002287 dev_kfree_skb(skb);
2288 }
2289
Johannes Berg571ecf62007-07-27 15:43:22 +02002290 out:
Andreas Müllerd0259332014-12-12 12:11:11 +01002291 ieee80211_led_rx(rx->local);
2292 out_no_led:
Johannes Berg571ecf62007-07-27 15:43:22 +02002293 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02002294 rx->sta->rx_stats.packets++;
Johannes Berg9ae54c82008-01-31 19:48:20 +01002295 return RX_CONTINUE;
Johannes Berg571ecf62007-07-27 15:43:22 +02002296}
2297
Johannes Berg1df332e2012-10-26 00:09:11 +02002298static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
Johannes Berg571ecf62007-07-27 15:43:22 +02002299{
Johannes Berg1df332e2012-10-26 00:09:11 +02002300 if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED)))
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002301 return -EACCES;
Johannes Berg571ecf62007-07-27 15:43:22 +02002302
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002303 return 0;
Johannes Berg571ecf62007-07-27 15:43:22 +02002304}
2305
Johannes Berg1df332e2012-10-26 00:09:11 +02002306static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
Johannes Berg571ecf62007-07-27 15:43:22 +02002307{
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002308 struct sk_buff *skb = rx->skb;
2309 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2310
Johannes Berg3017b802007-08-28 17:01:53 -04002311 /*
Johannes Berg7848ba72007-09-14 11:10:25 -04002312 * Pass through unencrypted frames if the hardware has
2313 * decrypted them already.
Johannes Berg3017b802007-08-28 17:01:53 -04002314 */
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002315 if (status->flag & RX_FLAG_DECRYPTED)
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002316 return 0;
Johannes Berg571ecf62007-07-27 15:43:22 +02002317
2318 /* Drop unencrypted frames if key is set. */
Harvey Harrison358c8d92008-07-15 18:44:13 -07002319 if (unlikely(!ieee80211_has_protected(fc) &&
Thomas Pedersen30b2f0b2020-01-13 21:59:40 -08002320 !ieee80211_is_any_nullfunc(fc) &&
Johannes Berge8f4fb72015-03-20 11:37:36 +01002321 ieee80211_is_data(fc) && rx->key))
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +02002322 return -EACCES;
Johannes Bergbef5d1c2010-02-16 11:05:00 +01002323
2324 return 0;
2325}
2326
Johannes Berg1df332e2012-10-26 00:09:11 +02002327static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
Johannes Bergbef5d1c2010-02-16 11:05:00 +01002328{
2329 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
Jouni Malinene3efca02010-03-28 22:31:15 -07002330 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Bergbef5d1c2010-02-16 11:05:00 +01002331 __le16 fc = hdr->frame_control;
Johannes Bergbef5d1c2010-02-16 11:05:00 +01002332
Jouni Malinene3efca02010-03-28 22:31:15 -07002333 /*
2334 * Pass through unencrypted frames if the hardware has
2335 * decrypted them already.
2336 */
2337 if (status->flag & RX_FLAG_DECRYPTED)
2338 return 0;
Johannes Bergbef5d1c2010-02-16 11:05:00 +01002339
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002340 if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) {
Jouni Malinend211e902010-03-28 22:29:52 -07002341 if (unlikely(!ieee80211_has_protected(fc) &&
2342 ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
Jouni Malinencf4e5942010-12-16 00:52:40 +02002343 rx->key)) {
Johannes Berg6ff57cf2013-05-16 00:55:00 +02002344 if (ieee80211_is_deauth(fc) ||
2345 ieee80211_is_disassoc(fc))
2346 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
2347 rx->skb->data,
2348 rx->skb->len);
Jouni Malinenf2ca3ea2009-05-08 12:36:03 +03002349 return -EACCES;
Jouni Malinencf4e5942010-12-16 00:52:40 +02002350 }
Jouni Malinenf2ca3ea2009-05-08 12:36:03 +03002351 /* BIP does not use Protected field, so need to check MMIE */
Joe Perchesf64f9e72009-11-29 16:55:45 -08002352 if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) &&
Jouni Malinencf4e5942010-12-16 00:52:40 +02002353 ieee80211_get_mmie_keyidx(rx->skb) < 0)) {
Johannes Berg6ff57cf2013-05-16 00:55:00 +02002354 if (ieee80211_is_deauth(fc) ||
2355 ieee80211_is_disassoc(fc))
2356 cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
2357 rx->skb->data,
2358 rx->skb->len);
Jouni Malinenf2ca3ea2009-05-08 12:36:03 +03002359 return -EACCES;
Jouni Malinencf4e5942010-12-16 00:52:40 +02002360 }
Jouni Malinenf2ca3ea2009-05-08 12:36:03 +03002361 /*
2362 * When using MFP, Action frames are not allowed prior to
2363 * having configured keys.
2364 */
2365 if (unlikely(ieee80211_is_action(fc) && !rx->key &&
Johannes Bergd8ca16d2014-01-23 16:20:29 +01002366 ieee80211_is_robust_mgmt_frame(rx->skb)))
Jouni Malinenf2ca3ea2009-05-08 12:36:03 +03002367 return -EACCES;
2368 }
Johannes Bergb3fc9c62008-04-13 10:12:47 +02002369
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002370 return 0;
Johannes Berg571ecf62007-07-27 15:43:22 +02002371}
2372
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002373static int
Felix Fietkau4114fa22011-04-12 19:15:22 +02002374__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
Johannes Berg571ecf62007-07-27 15:43:22 +02002375{
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002376 struct ieee80211_sub_if_data *sdata = rx->sdata;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002377 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
Felix Fietkaufbb327c2011-01-18 15:48:48 +01002378 bool check_port_control = false;
2379 struct ethhdr *ehdr;
2380 int ret;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002381
Felix Fietkau4114fa22011-04-12 19:15:22 +02002382 *port_control = false;
Johannes Berg9bc383d2009-11-19 11:55:19 +01002383 if (ieee80211_has_a4(hdr->frame_control) &&
2384 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002385 return -1;
Johannes Berg9bc383d2009-11-19 11:55:19 +01002386
Felix Fietkaufbb327c2011-01-18 15:48:48 +01002387 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2388 !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
2389
2390 if (!sdata->u.mgd.use_4addr)
2391 return -1;
Sathishkumar Muruganandam1ecef202018-08-28 17:51:38 +05302392 else if (!ether_addr_equal(hdr->addr1, sdata->vif.addr))
Felix Fietkaufbb327c2011-01-18 15:48:48 +01002393 check_port_control = true;
2394 }
2395
Johannes Berg9bc383d2009-11-19 11:55:19 +01002396 if (is_multicast_ether_addr(hdr->addr1) &&
Felix Fietkaufbb327c2011-01-18 15:48:48 +01002397 sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002398 return -1;
Johannes Berg571ecf62007-07-27 15:43:22 +02002399
Felix Fietkaufbb327c2011-01-18 15:48:48 +01002400 ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
Felix Fietkau4114fa22011-04-12 19:15:22 +02002401 if (ret < 0)
Felix Fietkaufbb327c2011-01-18 15:48:48 +01002402 return ret;
2403
2404 ehdr = (struct ethhdr *) rx->skb->data;
Felix Fietkau4114fa22011-04-12 19:15:22 +02002405 if (ehdr->h_proto == rx->sdata->control_port_protocol)
2406 *port_control = true;
2407 else if (check_port_control)
Felix Fietkaufbb327c2011-01-18 15:48:48 +01002408 return -1;
2409
2410 return 0;
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002411}
Johannes Berg571ecf62007-07-27 15:43:22 +02002412
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002413/*
2414 * requires that rx->skb is a frame with ethernet header
2415 */
Harvey Harrison358c8d92008-07-15 18:44:13 -07002416static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc)
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002417{
Senthil Balasubramanianc97c23e2008-05-28 23:15:32 +05302418 static const u8 pae_group_addr[ETH_ALEN] __aligned(2)
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002419 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 };
2420 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
2421
2422 /*
2423 * Allow EAPOL frames to us/the PAE group address regardless
2424 * of whether the frame was encrypted or not.
2425 */
Johannes Berga621fa42010-08-27 14:26:54 +03002426 if (ehdr->h_proto == rx->sdata->control_port_protocol &&
Joe Perches3bc79452012-05-08 18:56:53 +00002427 (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) ||
2428 ether_addr_equal(ehdr->h_dest, pae_group_addr)))
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002429 return true;
2430
2431 if (ieee80211_802_1x_port_control(rx) ||
Harvey Harrison358c8d92008-07-15 18:44:13 -07002432 ieee80211_drop_unencrypted(rx, fc))
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002433 return false;
2434
2435 return true;
2436}
2437
Denis Kenzior018f6fb2018-03-26 12:52:51 -05002438static void ieee80211_deliver_skb_to_local_stack(struct sk_buff *skb,
2439 struct ieee80211_rx_data *rx)
2440{
2441 struct ieee80211_sub_if_data *sdata = rx->sdata;
2442 struct net_device *dev = sdata->dev;
2443
2444 if (unlikely((skb->protocol == sdata->control_port_protocol ||
2445 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) &&
2446 sdata->control_port_over_nl80211)) {
2447 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
Denis Kenziorf8b43c52019-08-27 17:41:20 -05002448 bool noencrypt = !(status->flag & RX_FLAG_DECRYPTED);
Denis Kenzior018f6fb2018-03-26 12:52:51 -05002449
Denis Kenziora948f712018-07-03 15:05:48 -05002450 cfg80211_rx_control_port(dev, skb, noencrypt);
Denis Kenzior018f6fb2018-03-26 12:52:51 -05002451 dev_kfree_skb(skb);
2452 } else {
Denis Kenziorc8a41c62019-08-27 17:41:19 -05002453 memset(skb->cb, 0, sizeof(skb->cb));
2454
Denis Kenzior018f6fb2018-03-26 12:52:51 -05002455 /* deliver to local stack */
2456 if (rx->napi)
2457 napi_gro_receive(rx->napi, skb);
2458 else
2459 netif_receive_skb(skb);
2460 }
2461}
2462
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002463/*
2464 * requires that rx->skb is a frame with ethernet header
2465 */
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002466static void
Johannes Berg5cf121c2008-02-25 16:27:43 +01002467ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002468{
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002469 struct ieee80211_sub_if_data *sdata = rx->sdata;
2470 struct net_device *dev = sdata->dev;
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002471 struct sk_buff *skb, *xmit_skb;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002472 struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
2473 struct sta_info *dsta;
Johannes Berg571ecf62007-07-27 15:43:22 +02002474
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002475 skb = rx->skb;
2476 xmit_skb = NULL;
Johannes Berg571ecf62007-07-27 15:43:22 +02002477
Johannes Berg5a490512015-04-22 17:10:38 +02002478 ieee80211_rx_stats(dev, skb->len);
2479
Johannes Bergde8f18d2016-03-31 20:02:03 +03002480 if (rx->sta) {
2481 /* The seqno index has the same property as needed
2482 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
2483 * for non-QoS-data frames. Here we know it's a data
2484 * frame, so count MSDUs.
2485 */
Johannes Berg0f9c5a62016-03-31 20:02:09 +03002486 u64_stats_update_begin(&rx->sta->rx_stats.syncp);
Johannes Bergde8f18d2016-03-31 20:02:03 +03002487 rx->sta->rx_stats.msdu[rx->seqno_idx]++;
Johannes Berg0f9c5a62016-03-31 20:02:09 +03002488 u64_stats_update_end(&rx->sta->rx_stats.syncp);
Johannes Bergde8f18d2016-03-31 20:02:03 +03002489 }
2490
Johannes Berg05c914f2008-09-11 00:01:58 +02002491 if ((sdata->vif.type == NL80211_IFTYPE_AP ||
2492 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
Johannes Berg213cd112008-09-11 00:01:54 +02002493 !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
Johannes Berg9bc383d2009-11-19 11:55:19 +01002494 (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) {
Michael Braun72f15d52016-10-10 19:12:21 +02002495 if (is_multicast_ether_addr(ehdr->h_dest) &&
2496 ieee80211_vif_get_num_mcast_if(sdata) != 0) {
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002497 /*
2498 * send multicast frames both to higher layers in
2499 * local net stack and back to the wireless medium
2500 */
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002501 xmit_skb = skb_copy(skb, GFP_ATOMIC);
Joe Perchese87cc472012-05-13 21:56:26 +00002502 if (!xmit_skb)
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002503 net_info_ratelimited("%s: failed to clone multicast frame\n",
Joe Perchese87cc472012-05-13 21:56:26 +00002504 dev->name);
Johannes Berg42dca5e2018-10-09 10:00:21 +02002505 } else if (!is_multicast_ether_addr(ehdr->h_dest) &&
2506 !ether_addr_equal(ehdr->h_dest, ehdr->h_source)) {
2507 dsta = sta_info_get(sdata, ehdr->h_dest);
Johannes Bergabe60632009-11-25 17:46:18 +01002508 if (dsta) {
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002509 /*
2510 * The destination station is associated to
2511 * this AP (in this VLAN), so send the frame
2512 * directly to it and do not pass it to local
2513 * net stack.
Johannes Berg571ecf62007-07-27 15:43:22 +02002514 */
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002515 xmit_skb = skb;
Johannes Berg571ecf62007-07-27 15:43:22 +02002516 skb = NULL;
2517 }
Johannes Berg571ecf62007-07-27 15:43:22 +02002518 }
2519 }
2520
Kalle Valo59d9cb02009-12-17 13:54:57 +01002521#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
Johannes Berg9e890a1f2013-12-04 09:16:31 +01002522 if (skb) {
2523 /* 'align' will only take the values 0 or 2 here since all
2524 * frames are required to be aligned to 2-byte boundaries
2525 * when being passed to mac80211; the code here works just
2526 * as well if that isn't true, but mac80211 assumes it can
2527 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
Johannes Bergd1c3a372009-01-07 00:26:10 +01002528 */
Johannes Berg9e890a1f2013-12-04 09:16:31 +01002529 int align;
2530
2531 align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3;
Johannes Bergd1c3a372009-01-07 00:26:10 +01002532 if (align) {
2533 if (WARN_ON(skb_headroom(skb) < 3)) {
2534 dev_kfree_skb(skb);
2535 skb = NULL;
2536 } else {
2537 u8 *data = skb->data;
Zhu Yi8ce0b582009-10-28 13:13:52 -07002538 size_t len = skb_headlen(skb);
2539 skb->data -= align;
2540 memmove(skb->data, data, len);
2541 skb_set_tail_pointer(skb, len);
Johannes Bergd1c3a372009-01-07 00:26:10 +01002542 }
2543 }
Johannes Berg9e890a1f2013-12-04 09:16:31 +01002544 }
Johannes Bergd1c3a372009-01-07 00:26:10 +01002545#endif
2546
Johannes Berg9e890a1f2013-12-04 09:16:31 +01002547 if (skb) {
Johannes Berg9e890a1f2013-12-04 09:16:31 +01002548 skb->protocol = eth_type_trans(skb, dev);
Denis Kenzior018f6fb2018-03-26 12:52:51 -05002549 ieee80211_deliver_skb_to_local_stack(skb, rx);
Johannes Berg571ecf62007-07-27 15:43:22 +02002550 }
2551
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002552 if (xmit_skb) {
Helmut Schaaaef6c922011-12-21 09:11:35 +01002553 /*
2554 * Send to wireless media and increase priority by 256 to
2555 * keep the received priority instead of reclassifying
2556 * the frame (see cfg80211_classify8021d).
2557 */
2558 xmit_skb->priority += 256;
YOSHIFUJI Hideakif831e902007-12-12 03:54:23 +09002559 xmit_skb->protocol = htons(ETH_P_802_3);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002560 skb_reset_network_header(xmit_skb);
2561 skb_reset_mac_header(xmit_skb);
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002562 dev_queue_xmit(xmit_skb);
Johannes Berg571ecf62007-07-27 15:43:22 +02002563 }
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002564}
2565
Johannes Berg49461622008-06-30 15:10:45 +02002566static ieee80211_rx_result debug_noinline
Felix Fietkau24bba072018-02-27 13:03:07 +01002567__ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx, u8 data_offset)
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002568{
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002569 struct net_device *dev = rx->sdata->dev;
Zhu Yieaf85ca2009-12-01 10:18:37 +08002570 struct sk_buff *skb = rx->skb;
Harvey Harrison358c8d92008-07-15 18:44:13 -07002571 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2572 __le16 fc = hdr->frame_control;
Zhu Yieaf85ca2009-12-01 10:18:37 +08002573 struct sk_buff_head frame_list;
Johannes Berg7f6990c2016-10-05 15:29:49 +02002574 struct ethhdr ethhdr;
Johannes Berge2b52272016-10-05 16:42:06 +02002575 const u8 *check_da = ethhdr.h_dest, *check_sa = ethhdr.h_source;
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002576
Johannes Bergea720932016-10-05 10:14:42 +02002577 if (unlikely(ieee80211_has_a4(hdr->frame_control))) {
Johannes Berge2b52272016-10-05 16:42:06 +02002578 check_da = NULL;
2579 check_sa = NULL;
2580 } else switch (rx->sdata->vif.type) {
2581 case NL80211_IFTYPE_AP:
2582 case NL80211_IFTYPE_AP_VLAN:
2583 check_da = NULL;
2584 break;
2585 case NL80211_IFTYPE_STATION:
2586 if (!rx->sta ||
2587 !test_sta_flag(rx->sta, WLAN_STA_TDLS_PEER))
2588 check_sa = NULL;
2589 break;
2590 case NL80211_IFTYPE_MESH_POINT:
2591 check_sa = NULL;
2592 break;
2593 default:
2594 break;
Johannes Bergea720932016-10-05 10:14:42 +02002595 }
Zhu Yieaf85ca2009-12-01 10:18:37 +08002596
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002597 skb->dev = dev;
Zhu Yieaf85ca2009-12-01 10:18:37 +08002598 __skb_queue_head_init(&frame_list);
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002599
Johannes Berg7f6990c2016-10-05 15:29:49 +02002600 if (ieee80211_data_to_8023_exthdr(skb, &ethhdr,
2601 rx->sdata->vif.addr,
Felix Fietkau24bba072018-02-27 13:03:07 +01002602 rx->sdata->vif.type,
2603 data_offset))
Johannes Berg7f6990c2016-10-05 15:29:49 +02002604 return RX_DROP_UNUSABLE;
2605
Zhu Yieaf85ca2009-12-01 10:18:37 +08002606 ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,
2607 rx->sdata->vif.type,
Johannes Berg8b935ee2016-10-05 16:17:01 +02002608 rx->local->hw.extra_tx_headroom,
Johannes Berge2b52272016-10-05 16:42:06 +02002609 check_da, check_sa);
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002610
Zhu Yieaf85ca2009-12-01 10:18:37 +08002611 while (!skb_queue_empty(&frame_list)) {
2612 rx->skb = __skb_dequeue(&frame_list);
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002613
Harvey Harrison358c8d92008-07-15 18:44:13 -07002614 if (!ieee80211_frame_allowed(rx, fc)) {
Zhu Yieaf85ca2009-12-01 10:18:37 +08002615 dev_kfree_skb(rx->skb);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002616 continue;
2617 }
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002618
2619 ieee80211_deliver_skb(rx);
2620 }
2621
Johannes Berg9ae54c82008-01-31 19:48:20 +01002622 return RX_QUEUED;
Ron Rindjunskyfd4c7f22007-11-26 16:14:33 +02002623}
2624
Felix Fietkau24bba072018-02-27 13:03:07 +01002625static ieee80211_rx_result debug_noinline
2626ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx)
2627{
2628 struct sk_buff *skb = rx->skb;
2629 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2630 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2631 __le16 fc = hdr->frame_control;
2632
2633 if (!(status->rx_flags & IEEE80211_RX_AMSDU))
2634 return RX_CONTINUE;
2635
2636 if (unlikely(!ieee80211_is_data(fc)))
2637 return RX_CONTINUE;
2638
2639 if (unlikely(!ieee80211_is_data_present(fc)))
2640 return RX_DROP_MONITOR;
2641
2642 if (unlikely(ieee80211_has_a4(hdr->frame_control))) {
2643 switch (rx->sdata->vif.type) {
2644 case NL80211_IFTYPE_AP_VLAN:
2645 if (!rx->sdata->u.vlan.sta)
2646 return RX_DROP_UNUSABLE;
2647 break;
2648 case NL80211_IFTYPE_STATION:
2649 if (!rx->sdata->u.mgd.use_4addr)
2650 return RX_DROP_UNUSABLE;
2651 break;
2652 default:
2653 return RX_DROP_UNUSABLE;
2654 }
2655 }
2656
2657 if (is_multicast_ether_addr(hdr->addr1))
2658 return RX_DROP_UNUSABLE;
2659
2660 return __ieee80211_rx_h_amsdu(rx, 0);
2661}
2662
Ingo Molnarbf94e172008-10-12 23:51:38 -07002663#ifdef CONFIG_MAC80211_MESH
Davide Pesaventob0dee572008-09-27 17:29:12 +02002664static ieee80211_rx_result
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002665ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
2666{
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002667 struct ieee80211_hdr *fwd_hdr, *hdr;
2668 struct ieee80211_tx_info *info;
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002669 struct ieee80211s_hdr *mesh_hdr;
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002670 struct sk_buff *skb = rx->skb, *fwd_skb;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002671 struct ieee80211_local *local = rx->local;
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002672 struct ieee80211_sub_if_data *sdata = rx->sdata;
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002673 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Michal Kaziorcf440122016-01-25 14:43:24 +01002674 u16 ac, q, hdrlen;
Felix Fietkau51d0af22019-02-22 13:21:15 +01002675 int tailroom = 0;
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002676
2677 hdr = (struct ieee80211_hdr *) skb->data;
2678 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Berg9b395bc2012-10-26 00:36:40 +02002679
2680 /* make sure fixed part of mesh header is there, also checks skb len */
2681 if (!pskb_may_pull(rx->skb, hdrlen + 6))
2682 return RX_DROP_MONITOR;
2683
2684 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
2685
2686 /* make sure full mesh header is there, also checks skb len */
2687 if (!pskb_may_pull(rx->skb,
2688 hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr)))
2689 return RX_DROP_MONITOR;
2690
2691 /* reload pointers */
2692 hdr = (struct ieee80211_hdr *) skb->data;
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002693 mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
2694
Bob Copelandd0c22112015-03-02 14:28:52 -05002695 if (ieee80211_drop_unencrypted(rx, hdr->frame_control))
2696 return RX_DROP_MONITOR;
2697
Thomas Pedersen2157fdd2011-09-01 12:32:14 -07002698 /* frame is in RMC, don't forward */
2699 if (ieee80211_is_data(hdr->frame_control) &&
2700 is_multicast_ether_addr(hdr->addr1) &&
Johannes Bergbf7cd942013-02-15 14:40:31 +01002701 mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr))
Thomas Pedersen2157fdd2011-09-01 12:32:14 -07002702 return RX_DROP_MONITOR;
2703
Johannes Berg5c900672015-04-22 14:48:34 +02002704 if (!ieee80211_is_data(hdr->frame_control))
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002705 return RX_CONTINUE;
2706
2707 if (!mesh_hdr->ttl)
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002708 return RX_DROP_MONITOR;
2709
Javier Cardona43b7b312009-10-15 18:10:51 -07002710 if (mesh_hdr->flags & MESH_FLAGS_AE) {
YanBo79617de2008-09-22 13:30:32 +08002711 struct mesh_path *mppath;
Javier Cardona43b7b312009-10-15 18:10:51 -07002712 char *proxied_addr;
2713 char *mpp_addr;
2714
2715 if (is_multicast_ether_addr(hdr->addr1)) {
2716 mpp_addr = hdr->addr3;
2717 proxied_addr = mesh_hdr->eaddr1;
Rajkumar Manoharan5667c862017-05-14 21:41:55 -07002718 } else if ((mesh_hdr->flags & MESH_FLAGS_AE) ==
2719 MESH_FLAGS_AE_A5_A6) {
Johannes Berg9b395bc2012-10-26 00:36:40 +02002720 /* has_a4 already checked in ieee80211_rx_mesh_check */
Javier Cardona43b7b312009-10-15 18:10:51 -07002721 mpp_addr = hdr->addr4;
2722 proxied_addr = mesh_hdr->eaddr2;
Johannes Berg9b395bc2012-10-26 00:36:40 +02002723 } else {
2724 return RX_DROP_MONITOR;
Javier Cardona43b7b312009-10-15 18:10:51 -07002725 }
YanBo79617de2008-09-22 13:30:32 +08002726
YanBo79617de2008-09-22 13:30:32 +08002727 rcu_read_lock();
Johannes Bergbf7cd942013-02-15 14:40:31 +01002728 mppath = mpp_path_lookup(sdata, proxied_addr);
YanBo79617de2008-09-22 13:30:32 +08002729 if (!mppath) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01002730 mpp_path_add(sdata, proxied_addr, mpp_addr);
YanBo79617de2008-09-22 13:30:32 +08002731 } else {
2732 spin_lock_bh(&mppath->state_lock);
Joe Perchesb203ca32012-05-08 18:56:52 +00002733 if (!ether_addr_equal(mppath->mpp, mpp_addr))
Javier Cardona43b7b312009-10-15 18:10:51 -07002734 memcpy(mppath->mpp, mpp_addr, ETH_ALEN);
Henning Roggeab1c7902016-02-03 13:58:37 +01002735 mppath->exp_time = jiffies;
YanBo79617de2008-09-22 13:30:32 +08002736 spin_unlock_bh(&mppath->state_lock);
2737 }
2738 rcu_read_unlock();
2739 }
2740
Javier Cardona3c5772a2009-08-10 12:15:48 -07002741 /* Frame has reached destination. Don't forward */
2742 if (!is_multicast_ether_addr(hdr->addr1) &&
Joe Perchesb203ca32012-05-08 18:56:52 +00002743 ether_addr_equal(sdata->vif.addr, hdr->addr3))
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002744 return RX_CONTINUE;
2745
Michal Kaziorcf440122016-01-25 14:43:24 +01002746 ac = ieee80211_select_queue_80211(sdata, skb, hdr);
2747 q = sdata->vif.hw_queue[ac];
Thomas Pedersend3c15972011-11-24 17:15:23 -08002748 if (ieee80211_queue_stopped(&local->hw, q)) {
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002749 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion);
Thomas Pedersend3c15972011-11-24 17:15:23 -08002750 return RX_DROP_MONITOR;
2751 }
2752 skb_set_queue_mapping(skb, q);
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002753
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002754 if (!--mesh_hdr->ttl) {
Bob Copelanda0dc0202019-01-17 16:32:42 -05002755 if (!is_multicast_ether_addr(hdr->addr1))
2756 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh,
2757 dropped_frames_ttl);
Javier Cardona2ac64cd2012-10-24 12:43:31 -07002758 goto out;
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002759 }
2760
Chun-Yeow Yeohd6655082012-03-02 02:03:19 +08002761 if (!ifmsh->mshcfg.dot11MeshForwarding)
2762 goto out;
2763
Felix Fietkau51d0af22019-02-22 13:21:15 +01002764 if (sdata->crypto_tx_tailroom_needed_cnt)
2765 tailroom = IEEE80211_ENCRYPT_TAILROOM;
2766
Cedric Izoardc38c39b2017-01-11 14:39:07 +00002767 fwd_skb = skb_copy_expand(skb, local->tx_headroom +
Felix Fietkau51d0af22019-02-22 13:21:15 +01002768 sdata->encrypt_headroom,
2769 tailroom, GFP_ATOMIC);
Joe Perches0c3d5a92018-03-12 08:07:12 -07002770 if (!fwd_skb)
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002771 goto out;
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002772
2773 fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data;
Thomas Pedersen9d6d6f42013-04-08 11:06:12 -07002774 fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY);
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002775 info = IEEE80211_SKB_CB(fwd_skb);
2776 memset(info, 0, sizeof(*info));
2777 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
2778 info->control.vif = &rx->sdata->vif;
2779 info->control.jiffies = jiffies;
2780 if (is_multicast_ether_addr(fwd_hdr->addr1)) {
2781 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
2782 memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
Marco Porsch3f52b7e2013-01-30 18:14:08 +01002783 /* update power mode indication when forwarding */
2784 ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr);
Johannes Bergbf7cd942013-02-15 14:40:31 +01002785 } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) {
Marco Porsch3f52b7e2013-01-30 18:14:08 +01002786 /* mesh power mode flags updated in mesh_nexthop_lookup */
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002787 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
2788 } else {
2789 /* unable to resolve next hop */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002790 mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl,
Chun-Yeow Yeohf63f8422013-11-13 15:39:12 +08002791 fwd_hdr->addr3, 0,
2792 WLAN_REASON_MESH_PATH_NOFORWARD,
2793 fwd_hdr->addr2);
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002794 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route);
Jesper Juhl74b8cc32012-01-14 21:52:17 +01002795 kfree_skb(fwd_skb);
Thomas Pedersen30789eb2011-11-24 17:15:26 -08002796 return RX_DROP_MONITOR;
2797 }
2798
2799 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
2800 ieee80211_add_pending_skb(local, fwd_skb);
Johannes Bergb51aff02010-12-22 10:15:07 +01002801 out:
Johannes Bergdf140462015-04-22 14:40:58 +02002802 if (is_multicast_ether_addr(hdr->addr1))
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002803 return RX_CONTINUE;
Johannes Bergdf140462015-04-22 14:40:58 +02002804 return RX_DROP_MONITOR;
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002805}
Ingo Molnarbf94e172008-10-12 23:51:38 -07002806#endif
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02002807
2808static ieee80211_rx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +01002809ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002810{
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002811 struct ieee80211_sub_if_data *sdata = rx->sdata;
Vivek Natarajane15276a2010-02-08 17:47:01 +05302812 struct ieee80211_local *local = rx->local;
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01002813 struct net_device *dev = sdata->dev;
Harvey Harrison358c8d92008-07-15 18:44:13 -07002814 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
2815 __le16 fc = hdr->frame_control;
Felix Fietkau4114fa22011-04-12 19:15:22 +02002816 bool port_control;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002817 int err;
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002818
Harvey Harrison358c8d92008-07-15 18:44:13 -07002819 if (unlikely(!ieee80211_is_data(hdr->frame_control)))
Johannes Berg9ae54c82008-01-31 19:48:20 +01002820 return RX_CONTINUE;
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002821
Harvey Harrison358c8d92008-07-15 18:44:13 -07002822 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
Johannes Berge4c26ad2008-01-31 19:48:21 +01002823 return RX_DROP_MONITOR;
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002824
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002825 /*
Johannes Berge7f4a942011-11-04 11:18:20 +01002826 * Send unexpected-4addr-frame event to hostapd. For older versions,
2827 * also drop the frame to cooked monitor interfaces.
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002828 */
2829 if (ieee80211_has_a4(hdr->frame_control) &&
Johannes Berge7f4a942011-11-04 11:18:20 +01002830 sdata->vif.type == NL80211_IFTYPE_AP) {
2831 if (rx->sta &&
2832 !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
2833 cfg80211_rx_unexpected_4addr_frame(
2834 rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002835 return RX_DROP_MONITOR;
Johannes Berge7f4a942011-11-04 11:18:20 +01002836 }
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002837
Felix Fietkau4114fa22011-04-12 19:15:22 +02002838 err = __ieee80211_data_to_8023(rx, &port_control);
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002839 if (unlikely(err))
Johannes Berge4c26ad2008-01-31 19:48:21 +01002840 return RX_DROP_UNUSABLE;
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002841
Harvey Harrison358c8d92008-07-15 18:44:13 -07002842 if (!ieee80211_frame_allowed(rx, fc))
Johannes Berge4c26ad2008-01-31 19:48:21 +01002843 return RX_DROP_MONITOR;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002844
Arik Nemtsov8a4d32f2014-11-09 18:50:20 +02002845 /* directly handle TDLS channel switch requests/responses */
2846 if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
2847 cpu_to_be16(ETH_P_TDLS))) {
2848 struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
2849
2850 if (pskb_may_pull(rx->skb,
2851 offsetof(struct ieee80211_tdls_data, u)) &&
2852 tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
2853 tf->category == WLAN_CATEGORY_TDLS &&
2854 (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
2855 tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
Arik Nemtsovc8ff71e2015-07-08 15:41:45 +03002856 skb_queue_tail(&local->skb_queue_tdls_chsw, rx->skb);
2857 schedule_work(&local->tdls_chsw_work);
Arik Nemtsov8a4d32f2014-11-09 18:50:20 +02002858 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02002859 rx->sta->rx_stats.packets++;
Arik Nemtsov8a4d32f2014-11-09 18:50:20 +02002860
2861 return RX_QUEUED;
2862 }
2863 }
2864
Felix Fietkau4114fa22011-04-12 19:15:22 +02002865 if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
2866 unlikely(port_control) && sdata->bss) {
2867 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2868 u.ap);
2869 dev = sdata->dev;
2870 rx->sdata = sdata;
2871 }
2872
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002873 rx->skb->dev = dev;
2874
Johannes Berg602fae42016-03-17 15:02:52 +02002875 if (!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2876 local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
Rajkumar Manoharan8c99f692011-02-02 22:57:53 +05302877 !is_multicast_ether_addr(
2878 ((struct ethhdr *)rx->skb->data)->h_dest) &&
2879 (!local->scanning &&
Johannes Berg602fae42016-03-17 15:02:52 +02002880 !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)))
2881 mod_timer(&local->dynamic_ps_timer, jiffies +
2882 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
Vivek Natarajane15276a2010-02-08 17:47:01 +05302883
Ron Rindjunsky76ee65b2007-11-22 19:49:12 +02002884 ieee80211_deliver_skb(rx);
Johannes Berg571ecf62007-07-27 15:43:22 +02002885
Johannes Berg9ae54c82008-01-31 19:48:20 +01002886 return RX_QUEUED;
Johannes Berg571ecf62007-07-27 15:43:22 +02002887}
2888
Johannes Berg49461622008-06-30 15:10:45 +02002889static ieee80211_rx_result debug_noinline
Christian Lamparterf9e124f2013-02-04 17:44:44 +00002890ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames)
Ron Rindjunsky71364712007-12-25 17:00:36 +02002891{
Ron Rindjunsky71364712007-12-25 17:00:36 +02002892 struct sk_buff *skb = rx->skb;
Harvey Harrisona7767f92008-07-02 16:30:51 -07002893 struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data;
Ron Rindjunsky71364712007-12-25 17:00:36 +02002894 struct tid_ampdu_rx *tid_agg_rx;
2895 u16 start_seq_num;
2896 u16 tid;
2897
Harvey Harrisona7767f92008-07-02 16:30:51 -07002898 if (likely(!ieee80211_is_ctl(bar->frame_control)))
Johannes Berg9ae54c82008-01-31 19:48:20 +01002899 return RX_CONTINUE;
Ron Rindjunsky71364712007-12-25 17:00:36 +02002900
Harvey Harrisona7767f92008-07-02 16:30:51 -07002901 if (ieee80211_is_back_req(bar->frame_control)) {
Johannes Berg8ae59772010-05-30 14:52:58 +02002902 struct {
2903 __le16 control, start_seq_num;
2904 } __packed bar_data;
Emmanuel Grumbach63822462015-04-20 22:53:37 +03002905 struct ieee80211_event event = {
2906 .type = BAR_RX_EVENT,
2907 };
Johannes Berg8ae59772010-05-30 14:52:58 +02002908
Ron Rindjunsky71364712007-12-25 17:00:36 +02002909 if (!rx->sta)
Johannes Berga02ae752009-11-16 12:00:40 +01002910 return RX_DROP_MONITOR;
Johannes Berg8ae59772010-05-30 14:52:58 +02002911
2912 if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control),
2913 &bar_data, sizeof(bar_data)))
2914 return RX_DROP_MONITOR;
2915
Johannes Berg8ae59772010-05-30 14:52:58 +02002916 tid = le16_to_cpu(bar_data.control) >> 12;
Johannes Berga87f7362010-06-10 10:21:38 +02002917
Johannes Berg53f24972016-08-29 23:25:19 +03002918 if (!test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) &&
2919 !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg))
2920 ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid,
2921 WLAN_BACK_RECIPIENT,
2922 WLAN_REASON_QSTA_REQUIRE_SETUP);
2923
Johannes Berga87f7362010-06-10 10:21:38 +02002924 tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]);
2925 if (!tid_agg_rx)
Johannes Berga02ae752009-11-16 12:00:40 +01002926 return RX_DROP_MONITOR;
Ron Rindjunsky71364712007-12-25 17:00:36 +02002927
Johannes Berg8ae59772010-05-30 14:52:58 +02002928 start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4;
Emmanuel Grumbach63822462015-04-20 22:53:37 +03002929 event.u.ba.tid = tid;
2930 event.u.ba.ssn = start_seq_num;
2931 event.u.ba.sta = &rx->sta->sta;
Ron Rindjunsky71364712007-12-25 17:00:36 +02002932
2933 /* reset session timer */
Johannes Berg20ad19d2009-02-10 21:25:45 +01002934 if (tid_agg_rx->timeout)
2935 mod_timer(&tid_agg_rx->session_timer,
2936 TU_TO_EXP_TIME(tid_agg_rx->timeout));
Ron Rindjunsky71364712007-12-25 17:00:36 +02002937
Johannes Bergdd318572010-11-29 11:09:16 +01002938 spin_lock(&tid_agg_rx->reorder_lock);
Johannes Berga02ae752009-11-16 12:00:40 +01002939 /* release stored frames up to start of BAR */
Johannes Bergd3b2fb52012-06-22 12:48:38 +02002940 ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx,
Christian Lamparterf9e124f2013-02-04 17:44:44 +00002941 start_seq_num, frames);
Johannes Bergdd318572010-11-29 11:09:16 +01002942 spin_unlock(&tid_agg_rx->reorder_lock);
2943
Emmanuel Grumbach63822462015-04-20 22:53:37 +03002944 drv_event_callback(rx->local, rx->sdata, &event);
2945
Johannes Berga02ae752009-11-16 12:00:40 +01002946 kfree_skb(skb);
2947 return RX_QUEUED;
Ron Rindjunsky71364712007-12-25 17:00:36 +02002948 }
2949
Johannes Berg08daeca2010-05-30 14:53:43 +02002950 /*
2951 * After this point, we only want management frames,
2952 * so we can drop all remaining control frames to
2953 * cooked monitor interfaces.
2954 */
2955 return RX_DROP_MONITOR;
Ron Rindjunsky71364712007-12-25 17:00:36 +02002956}
2957
Jouni Malinenf4f727a2009-01-10 11:46:53 +02002958static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
2959 struct ieee80211_mgmt *mgmt,
2960 size_t len)
Jouni Malinenfea14732009-01-08 13:32:06 +02002961{
2962 struct ieee80211_local *local = sdata->local;
2963 struct sk_buff *skb;
2964 struct ieee80211_mgmt *resp;
2965
Joe Perchesb203ca32012-05-08 18:56:52 +00002966 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) {
Jouni Malinenfea14732009-01-08 13:32:06 +02002967 /* Not to own unicast address */
2968 return;
2969 }
2970
Joe Perchesb203ca32012-05-08 18:56:52 +00002971 if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) ||
2972 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002973 /* Not from the current AP or not associated yet. */
Jouni Malinenfea14732009-01-08 13:32:06 +02002974 return;
2975 }
2976
2977 if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) {
2978 /* Too short SA Query request frame */
2979 return;
2980 }
2981
2982 skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom);
2983 if (skb == NULL)
2984 return;
2985
2986 skb_reserve(skb, local->hw.extra_tx_headroom);
Johannes Bergb080db52017-06-16 14:29:19 +02002987 resp = skb_put_zero(skb, 24);
Jouni Malinenfea14732009-01-08 13:32:06 +02002988 memcpy(resp->da, mgmt->sa, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002989 memcpy(resp->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01002990 memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN);
Jouni Malinenfea14732009-01-08 13:32:06 +02002991 resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2992 IEEE80211_STYPE_ACTION);
2993 skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
2994 resp->u.action.category = WLAN_CATEGORY_SA_QUERY;
2995 resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE;
2996 memcpy(resp->u.action.u.sa_query.trans_id,
2997 mgmt->u.action.u.sa_query.trans_id,
2998 WLAN_SA_QUERY_TR_ID_LEN);
2999
Johannes Berg62ae67b2009-11-18 18:42:05 +01003000 ieee80211_tx_skb(sdata, skb);
Jouni Malinenfea14732009-01-08 13:32:06 +02003001}
3002
Johannes Berg49461622008-06-30 15:10:45 +02003003static ieee80211_rx_result debug_noinline
Johannes Berg2e161f72010-08-12 15:38:38 +02003004ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx)
3005{
3006 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
Johannes Berg554891e2010-09-24 12:38:25 +02003007 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Berg2e161f72010-08-12 15:38:38 +02003008
3009 /*
3010 * From here on, look only at management frames.
3011 * Data and control frames are already handled,
3012 * and unknown (reserved) frames are useless.
3013 */
3014 if (rx->skb->len < 24)
3015 return RX_DROP_MONITOR;
3016
3017 if (!ieee80211_is_mgmt(mgmt->frame_control))
3018 return RX_DROP_MONITOR;
3019
Johannes Bergee971922011-11-04 11:18:18 +01003020 if (rx->sdata->vif.type == NL80211_IFTYPE_AP &&
3021 ieee80211_is_beacon(mgmt->frame_control) &&
3022 !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) {
Johannes Berg804483e2012-03-05 22:18:41 +01003023 int sig = 0;
3024
Tosoni1ad22fb2018-03-14 16:58:34 +00003025 if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM) &&
3026 !(status->flag & RX_FLAG_NO_SIGNAL_VAL))
Johannes Berg804483e2012-03-05 22:18:41 +01003027 sig = status->signal;
3028
Johannes Bergee971922011-11-04 11:18:18 +01003029 cfg80211_report_obss_beacon(rx->local->hw.wiphy,
3030 rx->skb->data, rx->skb->len,
Ben Greear37c73b52012-10-26 14:49:25 -07003031 status->freq, sig);
Johannes Bergee971922011-11-04 11:18:18 +01003032 rx->flags |= IEEE80211_RX_BEACON_REPORTED;
3033 }
3034
Johannes Berg2e161f72010-08-12 15:38:38 +02003035 if (ieee80211_drop_unencrypted_mgmt(rx))
3036 return RX_DROP_UNUSABLE;
3037
3038 return RX_CONTINUE;
3039}
3040
3041static ieee80211_rx_result debug_noinline
Johannes Bergde1ede72008-09-09 14:42:50 +02003042ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
3043{
3044 struct ieee80211_local *local = rx->local;
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01003045 struct ieee80211_sub_if_data *sdata = rx->sdata;
Johannes Bergde1ede72008-09-09 14:42:50 +02003046 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
Johannes Berg554891e2010-09-24 12:38:25 +02003047 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Bergde1ede72008-09-09 14:42:50 +02003048 int len = rx->skb->len;
3049
3050 if (!ieee80211_is_action(mgmt->frame_control))
3051 return RX_CONTINUE;
3052
Jouni Malinen026331c2010-02-15 12:53:10 +02003053 /* drop too small frames */
3054 if (len < IEEE80211_MIN_ACTION_SIZE)
3055 return RX_DROP_UNUSABLE;
3056
Marco Porsch815b8092012-12-05 15:04:26 -08003057 if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003058 mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED &&
3059 mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
Johannes Berg84040802010-02-15 12:46:39 +02003060 return RX_DROP_UNUSABLE;
Johannes Bergde1ede72008-09-09 14:42:50 +02003061
Johannes Bergde1ede72008-09-09 14:42:50 +02003062 switch (mgmt->u.action.category) {
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003063 case WLAN_CATEGORY_HT:
3064 /* reject HT action frames from stations not supporting HT */
3065 if (!rx->sta->sta.ht_cap.ht_supported)
3066 goto invalid;
3067
3068 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3069 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3070 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3071 sdata->vif.type != NL80211_IFTYPE_AP &&
3072 sdata->vif.type != NL80211_IFTYPE_ADHOC)
3073 break;
3074
Johannes Bergec61cd62012-12-28 12:12:10 +01003075 /* verify action & smps_control/chanwidth are present */
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003076 if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3077 goto invalid;
3078
3079 switch (mgmt->u.action.u.ht_smps.action) {
3080 case WLAN_HT_ACTION_SMPS: {
3081 struct ieee80211_supported_band *sband;
Johannes Bergaf0ed692013-02-12 14:21:00 +01003082 enum ieee80211_smps_mode smps_mode;
tamizhr@codeaurora.orgff84e7b2018-01-31 16:24:50 +05303083 struct sta_opmode_info sta_opmode = {};
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003084
3085 /* convert to HT capability */
3086 switch (mgmt->u.action.u.ht_smps.smps_control) {
3087 case WLAN_HT_SMPS_CONTROL_DISABLED:
Johannes Bergaf0ed692013-02-12 14:21:00 +01003088 smps_mode = IEEE80211_SMPS_OFF;
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003089 break;
3090 case WLAN_HT_SMPS_CONTROL_STATIC:
Johannes Bergaf0ed692013-02-12 14:21:00 +01003091 smps_mode = IEEE80211_SMPS_STATIC;
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003092 break;
3093 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
Johannes Bergaf0ed692013-02-12 14:21:00 +01003094 smps_mode = IEEE80211_SMPS_DYNAMIC;
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003095 break;
3096 default:
3097 goto invalid;
3098 }
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003099
3100 /* if no change do nothing */
Johannes Bergaf0ed692013-02-12 14:21:00 +01003101 if (rx->sta->sta.smps_mode == smps_mode)
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003102 goto handled;
Johannes Bergaf0ed692013-02-12 14:21:00 +01003103 rx->sta->sta.smps_mode = smps_mode;
tamizhr@codeaurora.org57566b22018-03-27 19:16:16 +05303104 sta_opmode.smps_mode =
3105 ieee80211_smps_mode_to_smps_mode(smps_mode);
tamizhr@codeaurora.orgff84e7b2018-01-31 16:24:50 +05303106 sta_opmode.changed = STA_OPMODE_SMPS_MODE_CHANGED;
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003107
3108 sband = rx->local->hw.wiphy->bands[status->band];
3109
Johannes Berg64f68e52012-03-28 10:58:37 +02003110 rate_control_rate_update(local, sband, rx->sta,
3111 IEEE80211_RC_SMPS_CHANGED);
tamizhr@codeaurora.orgff84e7b2018-01-31 16:24:50 +05303112 cfg80211_sta_opmode_change_notify(sdata->dev,
3113 rx->sta->addr,
3114 &sta_opmode,
Yan-Hsuan Chuangc752cac2018-10-23 11:24:44 +08003115 GFP_ATOMIC);
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003116 goto handled;
3117 }
Johannes Bergec61cd62012-12-28 12:12:10 +01003118 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
3119 struct ieee80211_supported_band *sband;
3120 u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
Eliad Peller1c45c5c2014-12-14 11:05:51 +02003121 enum ieee80211_sta_rx_bandwidth max_bw, new_bw;
tamizhr@codeaurora.orgff84e7b2018-01-31 16:24:50 +05303122 struct sta_opmode_info sta_opmode = {};
Johannes Bergec61cd62012-12-28 12:12:10 +01003123
3124 /* If it doesn't support 40 MHz it can't change ... */
Johannes Berge1a0c6b2013-02-07 11:47:44 +01003125 if (!(rx->sta->sta.ht_cap.cap &
3126 IEEE80211_HT_CAP_SUP_WIDTH_20_40))
Johannes Bergec61cd62012-12-28 12:12:10 +01003127 goto handled;
3128
Johannes Berge1a0c6b2013-02-07 11:47:44 +01003129 if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ)
Eliad Peller1c45c5c2014-12-14 11:05:51 +02003130 max_bw = IEEE80211_STA_RX_BW_20;
Johannes Bergec61cd62012-12-28 12:12:10 +01003131 else
Eliad Peller1c45c5c2014-12-14 11:05:51 +02003132 max_bw = ieee80211_sta_cap_rx_bw(rx->sta);
3133
3134 /* set cur_max_bandwidth and recalc sta bw */
3135 rx->sta->cur_max_bandwidth = max_bw;
3136 new_bw = ieee80211_sta_cur_vht_bw(rx->sta);
Johannes Berge1a0c6b2013-02-07 11:47:44 +01003137
3138 if (rx->sta->sta.bandwidth == new_bw)
3139 goto handled;
Johannes Bergec61cd62012-12-28 12:12:10 +01003140
Eliad Peller1c45c5c2014-12-14 11:05:51 +02003141 rx->sta->sta.bandwidth = new_bw;
Johannes Bergec61cd62012-12-28 12:12:10 +01003142 sband = rx->local->hw.wiphy->bands[status->band];
tamizhr@codeaurora.org97f5f422018-03-27 19:16:17 +05303143 sta_opmode.bw =
3144 ieee80211_sta_rx_bw_to_chan_width(rx->sta);
tamizhr@codeaurora.orgff84e7b2018-01-31 16:24:50 +05303145 sta_opmode.changed = STA_OPMODE_MAX_BW_CHANGED;
Johannes Bergec61cd62012-12-28 12:12:10 +01003146
3147 rate_control_rate_update(local, sband, rx->sta,
3148 IEEE80211_RC_BW_CHANGED);
tamizhr@codeaurora.orgff84e7b2018-01-31 16:24:50 +05303149 cfg80211_sta_opmode_change_notify(sdata->dev,
3150 rx->sta->addr,
3151 &sta_opmode,
Yan-Hsuan Chuangc752cac2018-10-23 11:24:44 +08003152 GFP_ATOMIC);
Johannes Bergec61cd62012-12-28 12:12:10 +01003153 goto handled;
3154 }
Johannes Berg1d8d3de2011-12-16 15:28:57 +01003155 default:
3156 goto invalid;
3157 }
3158
3159 break;
Johannes Berg1b3a2e42013-03-26 15:17:18 +01003160 case WLAN_CATEGORY_PUBLIC:
3161 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3162 goto invalid;
3163 if (sdata->vif.type != NL80211_IFTYPE_STATION)
3164 break;
3165 if (!rx->sta)
3166 break;
3167 if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid))
3168 break;
3169 if (mgmt->u.action.u.ext_chan_switch.action_code !=
3170 WLAN_PUB_ACTION_EXT_CHANSW_ANN)
3171 break;
3172 if (len < offsetof(struct ieee80211_mgmt,
3173 u.action.u.ext_chan_switch.variable))
3174 goto invalid;
3175 goto queue;
Johannes Berg0af83d32012-12-27 18:55:36 +01003176 case WLAN_CATEGORY_VHT:
3177 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3178 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3179 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3180 sdata->vif.type != NL80211_IFTYPE_AP &&
3181 sdata->vif.type != NL80211_IFTYPE_ADHOC)
3182 break;
3183
3184 /* verify action code is present */
3185 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3186 goto invalid;
3187
3188 switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
3189 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
Johannes Berg0af83d32012-12-27 18:55:36 +01003190 /* verify opmode is present */
3191 if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3192 goto invalid;
Johannes Bergd2941df2016-10-20 08:52:50 +02003193 goto queue;
Johannes Berg0af83d32012-12-27 18:55:36 +01003194 }
Sara Sharon23a1f8d2015-12-08 16:04:31 +02003195 case WLAN_VHT_ACTION_GROUPID_MGMT: {
3196 if (len < IEEE80211_MIN_ACTION_SIZE + 25)
3197 goto invalid;
3198 goto queue;
3199 }
Johannes Berg0af83d32012-12-27 18:55:36 +01003200 default:
3201 break;
3202 }
3203 break;
Johannes Bergde1ede72008-09-09 14:42:50 +02003204 case WLAN_CATEGORY_BACK:
Johannes Berg8abd3f92009-02-10 21:25:47 +01003205 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
Thomas Pedersenae2772b2011-10-26 14:47:29 -07003206 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
Johannes Berg8abd3f92009-02-10 21:25:47 +01003207 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
Alexander Simon13c40c52011-11-30 16:56:34 +01003208 sdata->vif.type != NL80211_IFTYPE_AP &&
3209 sdata->vif.type != NL80211_IFTYPE_ADHOC)
Johannes Berg84040802010-02-15 12:46:39 +02003210 break;
Johannes Berg8abd3f92009-02-10 21:25:47 +01003211
Jouni Malinen026331c2010-02-15 12:53:10 +02003212 /* verify action_code is present */
3213 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3214 break;
3215
Johannes Bergde1ede72008-09-09 14:42:50 +02003216 switch (mgmt->u.action.u.addba_req.action_code) {
3217 case WLAN_ACTION_ADDBA_REQ:
3218 if (len < (IEEE80211_MIN_ACTION_SIZE +
3219 sizeof(mgmt->u.action.u.addba_req)))
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02003220 goto invalid;
3221 break;
Johannes Bergde1ede72008-09-09 14:42:50 +02003222 case WLAN_ACTION_ADDBA_RESP:
3223 if (len < (IEEE80211_MIN_ACTION_SIZE +
3224 sizeof(mgmt->u.action.u.addba_resp)))
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02003225 goto invalid;
3226 break;
Johannes Bergde1ede72008-09-09 14:42:50 +02003227 case WLAN_ACTION_DELBA:
3228 if (len < (IEEE80211_MIN_ACTION_SIZE +
3229 sizeof(mgmt->u.action.u.delba)))
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02003230 goto invalid;
3231 break;
3232 default:
3233 goto invalid;
Johannes Bergde1ede72008-09-09 14:42:50 +02003234 }
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02003235
Johannes Berg8b58ff82010-06-10 10:21:51 +02003236 goto queue;
Johannes Berg39192c02008-09-09 14:49:03 +02003237 case WLAN_CATEGORY_SPECTRUM_MGMT:
Jouni Malinen026331c2010-02-15 12:53:10 +02003238 /* verify action_code is present */
3239 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3240 break;
3241
Johannes Berg39192c02008-09-09 14:49:03 +02003242 switch (mgmt->u.action.u.measurement.action_code) {
3243 case WLAN_ACTION_SPCT_MSR_REQ:
Johannes Berg57fbcce2016-04-12 15:56:15 +02003244 if (status->band != NL80211_BAND_5GHZ)
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003245 break;
3246
Johannes Berg39192c02008-09-09 14:49:03 +02003247 if (len < (IEEE80211_MIN_ACTION_SIZE +
3248 sizeof(mgmt->u.action.u.measurement)))
Johannes Berg84040802010-02-15 12:46:39 +02003249 break;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003250
Johannes Bergcc32abd2009-05-15 11:52:31 +02003251 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Johannes Berg84040802010-02-15 12:46:39 +02003252 break;
Johannes Bergcc32abd2009-05-15 11:52:31 +02003253
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003254 ieee80211_process_measurement_req(sdata, mgmt, len);
3255 goto handled;
3256 case WLAN_ACTION_SPCT_CHL_SWITCH: {
3257 u8 *bssid;
3258 if (len < (IEEE80211_MIN_ACTION_SIZE +
3259 sizeof(mgmt->u.action.u.chan_switch)))
3260 break;
3261
3262 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003263 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3264 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003265 break;
3266
3267 if (sdata->vif.type == NL80211_IFTYPE_STATION)
3268 bssid = sdata->u.mgd.bssid;
3269 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3270 bssid = sdata->u.ibss.bssid;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003271 else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
3272 bssid = mgmt->sa;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003273 else
3274 break;
3275
3276 if (!ether_addr_equal(mgmt->bssid, bssid))
Johannes Berg84040802010-02-15 12:46:39 +02003277 break;
Sujithc481ec92009-01-06 09:28:37 +05303278
Johannes Berg8b58ff82010-06-10 10:21:51 +02003279 goto queue;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003280 }
Johannes Berg39192c02008-09-09 14:49:03 +02003281 }
3282 break;
Jouni Malinenfea14732009-01-08 13:32:06 +02003283 case WLAN_CATEGORY_SA_QUERY:
3284 if (len < (IEEE80211_MIN_ACTION_SIZE +
3285 sizeof(mgmt->u.action.u.sa_query)))
Johannes Berg84040802010-02-15 12:46:39 +02003286 break;
3287
Jouni Malinenfea14732009-01-08 13:32:06 +02003288 switch (mgmt->u.action.u.sa_query.action) {
3289 case WLAN_ACTION_SA_QUERY_REQUEST:
3290 if (sdata->vif.type != NL80211_IFTYPE_STATION)
Johannes Berg84040802010-02-15 12:46:39 +02003291 break;
Jouni Malinenfea14732009-01-08 13:32:06 +02003292 ieee80211_process_sa_query_req(sdata, mgmt, len);
Johannes Berg84040802010-02-15 12:46:39 +02003293 goto handled;
Jouni Malinenfea14732009-01-08 13:32:06 +02003294 }
3295 break;
Thomas Pedersen8db09852011-08-12 20:01:00 -07003296 case WLAN_CATEGORY_SELF_PROTECTED:
Johannes Berg9b395bc2012-10-26 00:36:40 +02003297 if (len < (IEEE80211_MIN_ACTION_SIZE +
3298 sizeof(mgmt->u.action.u.self_prot.action_code)))
3299 break;
3300
Thomas Pedersen8db09852011-08-12 20:01:00 -07003301 switch (mgmt->u.action.u.self_prot.action_code) {
3302 case WLAN_SP_MESH_PEERING_OPEN:
3303 case WLAN_SP_MESH_PEERING_CLOSE:
3304 case WLAN_SP_MESH_PEERING_CONFIRM:
3305 if (!ieee80211_vif_is_mesh(&sdata->vif))
3306 goto invalid;
Thomas Pedersena6dad6a2013-03-04 13:06:12 -08003307 if (sdata->u.mesh.user_mpm)
Thomas Pedersen8db09852011-08-12 20:01:00 -07003308 /* userspace handles this frame */
3309 break;
3310 goto queue;
3311 case WLAN_SP_MGK_INFORM:
3312 case WLAN_SP_MGK_ACK:
3313 if (!ieee80211_vif_is_mesh(&sdata->vif))
3314 goto invalid;
3315 break;
3316 }
3317 break;
Javier Cardonad3aaec8a2011-05-03 16:57:09 -07003318 case WLAN_CATEGORY_MESH_ACTION:
Johannes Berg9b395bc2012-10-26 00:36:40 +02003319 if (len < (IEEE80211_MIN_ACTION_SIZE +
3320 sizeof(mgmt->u.action.u.mesh_action.action_code)))
3321 break;
3322
Johannes Berg77a121c2010-06-10 10:21:34 +02003323 if (!ieee80211_vif_is_mesh(&sdata->vif))
3324 break;
Thomas Pedersen25d49e42011-08-11 19:35:15 -07003325 if (mesh_action_is_path_sel(mgmt) &&
Johannes Berg1df332e2012-10-26 00:09:11 +02003326 !mesh_path_sel_is_hwmp(sdata))
Javier Cardonac7108a72010-12-16 17:37:50 -08003327 break;
3328 goto queue;
Johannes Berg84040802010-02-15 12:46:39 +02003329 }
Jouni Malinen026331c2010-02-15 12:53:10 +02003330
Johannes Berg2e161f72010-08-12 15:38:38 +02003331 return RX_CONTINUE;
3332
Johannes Bergbed7ee6e2010-06-10 10:21:35 +02003333 invalid:
Johannes Berg554891e2010-09-24 12:38:25 +02003334 status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM;
Johannes Berg2e161f72010-08-12 15:38:38 +02003335 /* will return in the next handlers */
3336 return RX_CONTINUE;
3337
3338 handled:
3339 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003340 rx->sta->rx_stats.packets++;
Johannes Berg2e161f72010-08-12 15:38:38 +02003341 dev_kfree_skb(rx->skb);
3342 return RX_QUEUED;
3343
3344 queue:
Johannes Berg2e161f72010-08-12 15:38:38 +02003345 skb_queue_tail(&sdata->skb_queue, rx->skb);
3346 ieee80211_queue_work(&local->hw, &sdata->work);
3347 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003348 rx->sta->rx_stats.packets++;
Johannes Berg2e161f72010-08-12 15:38:38 +02003349 return RX_QUEUED;
3350}
3351
3352static ieee80211_rx_result debug_noinline
3353ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
3354{
Johannes Berg554891e2010-09-24 12:38:25 +02003355 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Berg804483e2012-03-05 22:18:41 +01003356 int sig = 0;
Johannes Berg2e161f72010-08-12 15:38:38 +02003357
3358 /* skip known-bad action frames and return them in the next handler */
Johannes Berg554891e2010-09-24 12:38:25 +02003359 if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM)
Johannes Berg2e161f72010-08-12 15:38:38 +02003360 return RX_CONTINUE;
Felix Fietkaud7907442010-01-07 20:23:53 +01003361
Jouni Malinen026331c2010-02-15 12:53:10 +02003362 /*
3363 * Getting here means the kernel doesn't know how to handle
3364 * it, but maybe userspace does ... include returned frames
3365 * so userspace can register for those to know whether ones
3366 * it transmitted were processed or returned.
3367 */
Jouni Malinen026331c2010-02-15 12:53:10 +02003368
Tosoni1ad22fb2018-03-14 16:58:34 +00003369 if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM) &&
3370 !(status->flag & RX_FLAG_NO_SIGNAL_VAL))
Johannes Berg804483e2012-03-05 22:18:41 +01003371 sig = status->signal;
3372
Johannes Berg71bbc992012-06-15 15:30:18 +02003373 if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig,
Vladimir Kondratiev970fdfa2014-08-11 03:29:57 -07003374 rx->skb->data, rx->skb->len, 0)) {
Johannes Berg2e161f72010-08-12 15:38:38 +02003375 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003376 rx->sta->rx_stats.packets++;
Johannes Berg2e161f72010-08-12 15:38:38 +02003377 dev_kfree_skb(rx->skb);
3378 return RX_QUEUED;
3379 }
3380
Johannes Berg2e161f72010-08-12 15:38:38 +02003381 return RX_CONTINUE;
3382}
3383
3384static ieee80211_rx_result debug_noinline
3385ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx)
3386{
3387 struct ieee80211_local *local = rx->local;
3388 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
3389 struct sk_buff *nskb;
3390 struct ieee80211_sub_if_data *sdata = rx->sdata;
Johannes Berg554891e2010-09-24 12:38:25 +02003391 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
Johannes Berg2e161f72010-08-12 15:38:38 +02003392
3393 if (!ieee80211_is_action(mgmt->frame_control))
3394 return RX_CONTINUE;
3395
3396 /*
3397 * For AP mode, hostapd is responsible for handling any action
3398 * frames that we didn't handle, including returning unknown
3399 * ones. For all other modes we will return them to the sender,
3400 * setting the 0x80 bit in the action category, as required by
Johannes Berg4b5ebcc2012-06-27 15:38:56 +02003401 * 802.11-2012 9.24.4.
Johannes Berg2e161f72010-08-12 15:38:38 +02003402 * Newer versions of hostapd shall also use the management frame
3403 * registration mechanisms, but older ones still use cooked
3404 * monitor interfaces so push all frames there.
3405 */
Johannes Berg554891e2010-09-24 12:38:25 +02003406 if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) &&
Johannes Berg2e161f72010-08-12 15:38:38 +02003407 (sdata->vif.type == NL80211_IFTYPE_AP ||
3408 sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
3409 return RX_DROP_MONITOR;
Jouni Malinen026331c2010-02-15 12:53:10 +02003410
Johannes Berg4b5ebcc2012-06-27 15:38:56 +02003411 if (is_multicast_ether_addr(mgmt->da))
3412 return RX_DROP_MONITOR;
3413
Johannes Berg84040802010-02-15 12:46:39 +02003414 /* do not return rejected action frames */
3415 if (mgmt->u.action.category & 0x80)
3416 return RX_DROP_UNUSABLE;
3417
3418 nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0,
3419 GFP_ATOMIC);
3420 if (nskb) {
John W. Linville292b4df2010-06-24 11:13:56 -04003421 struct ieee80211_mgmt *nmgmt = (void *)nskb->data;
Johannes Berg84040802010-02-15 12:46:39 +02003422
John W. Linville292b4df2010-06-24 11:13:56 -04003423 nmgmt->u.action.category |= 0x80;
3424 memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN);
3425 memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN);
Johannes Berg84040802010-02-15 12:46:39 +02003426
3427 memset(nskb->cb, 0, sizeof(nskb->cb));
3428
Johannes Berg07e5a5f2013-03-07 13:22:05 +01003429 if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
3430 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb);
3431
3432 info->flags = IEEE80211_TX_CTL_TX_OFFCHAN |
3433 IEEE80211_TX_INTFL_OFFCHAN_TX_OK |
3434 IEEE80211_TX_CTL_NO_CCK_RATE;
Johannes Berg30686bf2015-06-02 21:39:54 +02003435 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
Johannes Berg07e5a5f2013-03-07 13:22:05 +01003436 info->hw_queue =
3437 local->hw.offchannel_tx_hw_queue;
3438 }
3439
3440 __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7,
Johannes Bergb9771d42018-05-28 15:47:41 +02003441 status->band, 0);
Johannes Bergde1ede72008-09-09 14:42:50 +02003442 }
Johannes Berg39192c02008-09-09 14:49:03 +02003443 dev_kfree_skb(rx->skb);
3444 return RX_QUEUED;
Johannes Bergde1ede72008-09-09 14:42:50 +02003445}
3446
3447static ieee80211_rx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +01003448ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
Johannes Berg571ecf62007-07-27 15:43:22 +02003449{
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01003450 struct ieee80211_sub_if_data *sdata = rx->sdata;
Johannes Berg77a121c2010-06-10 10:21:34 +02003451 struct ieee80211_mgmt *mgmt = (void *)rx->skb->data;
3452 __le16 stype;
Johannes Berg571ecf62007-07-27 15:43:22 +02003453
Johannes Berg77a121c2010-06-10 10:21:34 +02003454 stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE);
Johannes Berg472dbc42008-09-11 00:01:49 +02003455
Johannes Berg77a121c2010-06-10 10:21:34 +02003456 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
3457 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
Rostislav Lisovy239281f2014-11-03 10:33:19 +01003458 sdata->vif.type != NL80211_IFTYPE_OCB &&
Johannes Berg77a121c2010-06-10 10:21:34 +02003459 sdata->vif.type != NL80211_IFTYPE_STATION)
3460 return RX_DROP_MONITOR;
Johannes Bergf9d540e2007-09-28 14:02:09 +02003461
Johannes Berg77a121c2010-06-10 10:21:34 +02003462 switch (stype) {
Johannes Berg66e67e42012-01-20 13:55:27 +01003463 case cpu_to_le16(IEEE80211_STYPE_AUTH):
Johannes Berg77a121c2010-06-10 10:21:34 +02003464 case cpu_to_le16(IEEE80211_STYPE_BEACON):
3465 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
3466 /* process for all: mesh, mlme, ibss */
3467 break;
Johannes Berg95697f92019-10-04 15:37:05 +03003468 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
3469 if (is_multicast_ether_addr(mgmt->da) &&
3470 !is_broadcast_ether_addr(mgmt->da))
3471 return RX_DROP_MONITOR;
3472
3473 /* process only for station/IBSS */
3474 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3475 sdata->vif.type != NL80211_IFTYPE_ADHOC)
3476 return RX_DROP_MONITOR;
3477 break;
Johannes Berg66e67e42012-01-20 13:55:27 +01003478 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
3479 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
Johannes Berg77a121c2010-06-10 10:21:34 +02003480 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
Christian Lamparter2c31333a2010-11-29 20:53:23 +01003481 if (is_multicast_ether_addr(mgmt->da) &&
3482 !is_broadcast_ether_addr(mgmt->da))
3483 return RX_DROP_MONITOR;
3484
Johannes Berg77a121c2010-06-10 10:21:34 +02003485 /* process only for station */
3486 if (sdata->vif.type != NL80211_IFTYPE_STATION)
3487 return RX_DROP_MONITOR;
3488 break;
3489 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
Thomas Pedersen9fb04b52013-02-14 11:20:14 -08003490 /* process only for ibss and mesh */
3491 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3492 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
Johannes Berg77a121c2010-06-10 10:21:34 +02003493 return RX_DROP_MONITOR;
3494 break;
3495 default:
3496 return RX_DROP_MONITOR;
3497 }
Johannes Berg46900292009-02-15 12:44:28 +01003498
Johannes Berg77a121c2010-06-10 10:21:34 +02003499 /* queue up frame and kick off work to process it */
3500 skb_queue_tail(&sdata->skb_queue, rx->skb);
3501 ieee80211_queue_work(&rx->local->hw, &sdata->work);
Johannes Berg8b58ff82010-06-10 10:21:51 +02003502 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003503 rx->sta->rx_stats.packets++;
Johannes Berg77a121c2010-06-10 10:21:34 +02003504
3505 return RX_QUEUED;
Johannes Berg571ecf62007-07-27 15:43:22 +02003506}
3507
Johannes Berg5f0b7de2009-11-16 13:58:21 +01003508static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
3509 struct ieee80211_rate *rate)
Michael Wu3d30d942008-01-31 19:48:27 +01003510{
3511 struct ieee80211_sub_if_data *sdata;
3512 struct ieee80211_local *local = rx->local;
Michael Wu3d30d942008-01-31 19:48:27 +01003513 struct sk_buff *skb = rx->skb, *skb2;
3514 struct net_device *prev_dev = NULL;
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01003515 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
Johannes Berg293702a2012-03-02 13:18:19 +01003516 int needed_headroom;
Michael Wu3d30d942008-01-31 19:48:27 +01003517
Johannes Berg554891e2010-09-24 12:38:25 +02003518 /*
3519 * If cooked monitor has been processed already, then
3520 * don't do it again. If not, set the flag.
3521 */
3522 if (rx->flags & IEEE80211_RX_CMNTR)
John W. Linville7c1e1832010-09-24 15:52:49 -04003523 goto out_free_skb;
Johannes Berg554891e2010-09-24 12:38:25 +02003524 rx->flags |= IEEE80211_RX_CMNTR;
John W. Linville7c1e1832010-09-24 15:52:49 -04003525
Johannes Berg152c4772011-10-21 10:22:22 +02003526 /* If there are no cooked monitor interfaces, just free the SKB */
3527 if (!local->cooked_mntrs)
3528 goto out_free_skb;
3529
Johannes Berg1f7bba72014-11-06 22:56:36 +01003530 /* vendor data is long removed here */
3531 status->flag &= ~RX_FLAG_RADIOTAP_VENDOR_DATA;
Johannes Berg293702a2012-03-02 13:18:19 +01003532 /* room for the radiotap header based on driver features */
Johannes Berg1f7bba72014-11-06 22:56:36 +01003533 needed_headroom = ieee80211_rx_radiotap_hdrlen(local, status, skb);
Johannes Berg293702a2012-03-02 13:18:19 +01003534
3535 if (skb_headroom(skb) < needed_headroom &&
3536 pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC))
Michael Wu3d30d942008-01-31 19:48:27 +01003537 goto out_free_skb;
3538
Johannes Berg293702a2012-03-02 13:18:19 +01003539 /* prepend radiotap information */
Felix Fietkau973ef212012-04-16 14:56:48 +02003540 ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom,
3541 false);
Michael Wu3d30d942008-01-31 19:48:27 +01003542
Zhang Shengjud57a5442016-03-03 01:16:56 +00003543 skb_reset_mac_header(skb);
Michael Wu3d30d942008-01-31 19:48:27 +01003544 skb->ip_summed = CHECKSUM_UNNECESSARY;
3545 skb->pkt_type = PACKET_OTHERHOST;
3546 skb->protocol = htons(ETH_P_802_2);
3547
3548 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg9607e6b662009-12-23 13:15:31 +01003549 if (!ieee80211_sdata_running(sdata))
Michael Wu3d30d942008-01-31 19:48:27 +01003550 continue;
3551
Johannes Berg05c914f2008-09-11 00:01:58 +02003552 if (sdata->vif.type != NL80211_IFTYPE_MONITOR ||
Aviya Erenfeldd8212182016-08-29 23:25:15 +03003553 !(sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES))
Michael Wu3d30d942008-01-31 19:48:27 +01003554 continue;
3555
3556 if (prev_dev) {
3557 skb2 = skb_clone(skb, GFP_ATOMIC);
3558 if (skb2) {
3559 skb2->dev = prev_dev;
John W. Linville5548a8a2010-06-24 14:25:56 -04003560 netif_receive_skb(skb2);
Michael Wu3d30d942008-01-31 19:48:27 +01003561 }
3562 }
3563
3564 prev_dev = sdata->dev;
Johannes Berg5a490512015-04-22 17:10:38 +02003565 ieee80211_rx_stats(sdata->dev, skb->len);
Michael Wu3d30d942008-01-31 19:48:27 +01003566 }
3567
3568 if (prev_dev) {
3569 skb->dev = prev_dev;
John W. Linville5548a8a2010-06-24 14:25:56 -04003570 netif_receive_skb(skb);
Johannes Berg554891e2010-09-24 12:38:25 +02003571 return;
3572 }
Michael Wu3d30d942008-01-31 19:48:27 +01003573
3574 out_free_skb:
3575 dev_kfree_skb(skb);
3576}
3577
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003578static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx,
3579 ieee80211_rx_result res)
3580{
3581 switch (res) {
3582 case RX_DROP_MONITOR:
3583 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
3584 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003585 rx->sta->rx_stats.dropped++;
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003586 /* fall through */
3587 case RX_CONTINUE: {
3588 struct ieee80211_rate *rate = NULL;
3589 struct ieee80211_supported_band *sband;
3590 struct ieee80211_rx_status *status;
3591
3592 status = IEEE80211_SKB_RXCB((rx->skb));
3593
3594 sband = rx->local->hw.wiphy->bands[status->band];
Luca Coelho41cbb0f2018-06-09 09:14:44 +03003595 if (status->encoding == RX_ENC_LEGACY)
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003596 rate = &sband->bitrates[status->rate_idx];
3597
3598 ieee80211_rx_cooked_monitor(rx, rate);
3599 break;
3600 }
3601 case RX_DROP_UNUSABLE:
3602 I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
3603 if (rx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003604 rx->sta->rx_stats.dropped++;
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003605 dev_kfree_skb(rx->skb);
3606 break;
3607 case RX_QUEUED:
3608 I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued);
3609 break;
3610 }
3611}
3612
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003613static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx,
3614 struct sk_buff_head *frames)
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003615{
3616 ieee80211_rx_result res = RX_DROP_MONITOR;
3617 struct sk_buff *skb;
3618
3619#define CALL_RXH(rxh) \
3620 do { \
3621 res = rxh(rx); \
3622 if (res != RX_CONTINUE) \
3623 goto rxh_next; \
Johannes Berg8ebaa5b2016-03-31 20:02:04 +03003624 } while (0)
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003625
Johannes Berg45ceeee2015-03-16 09:08:20 +01003626 /* Lock here to avoid hitting all of the data used in the RX
3627 * path (e.g. key data, station data, ...) concurrently when
3628 * a frame is released from the reorder buffer due to timeout
3629 * from the timer, potentially concurrently with RX from the
3630 * driver.
3631 */
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003632 spin_lock_bh(&rx->local->rx_path_lock);
Christian Lamparter24a8fda2010-12-30 17:25:29 +01003633
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003634 while ((skb = __skb_dequeue(frames))) {
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003635 /*
3636 * all the other fields are valid across frames
3637 * that belong to an aMPDU since they are on the
3638 * same TID from the same station
3639 */
3640 rx->skb = skb;
3641
Johannes Berg8ebaa5b2016-03-31 20:02:04 +03003642 CALL_RXH(ieee80211_rx_h_check_more_data);
3643 CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll);
3644 CALL_RXH(ieee80211_rx_h_sta_process);
3645 CALL_RXH(ieee80211_rx_h_decrypt);
3646 CALL_RXH(ieee80211_rx_h_defragment);
3647 CALL_RXH(ieee80211_rx_h_michael_mic_verify);
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003648 /* must be after MMIC verify so header is counted in MPDU mic */
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003649#ifdef CONFIG_MAC80211_MESH
3650 if (ieee80211_vif_is_mesh(&rx->sdata->vif))
3651 CALL_RXH(ieee80211_rx_h_mesh_fwding);
3652#endif
Johannes Berg8ebaa5b2016-03-31 20:02:04 +03003653 CALL_RXH(ieee80211_rx_h_amsdu);
3654 CALL_RXH(ieee80211_rx_h_data);
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003655
3656 /* special treatment -- needs the queue */
3657 res = ieee80211_rx_h_ctrl(rx, frames);
3658 if (res != RX_CONTINUE)
3659 goto rxh_next;
3660
Johannes Berg8ebaa5b2016-03-31 20:02:04 +03003661 CALL_RXH(ieee80211_rx_h_mgmt_check);
3662 CALL_RXH(ieee80211_rx_h_action);
3663 CALL_RXH(ieee80211_rx_h_userspace_mgmt);
3664 CALL_RXH(ieee80211_rx_h_action_return);
3665 CALL_RXH(ieee80211_rx_h_mgmt);
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003666
3667 rxh_next:
3668 ieee80211_rx_handlers_result(rx, res);
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003669
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003670#undef CALL_RXH
3671 }
Christian Lamparter24a8fda2010-12-30 17:25:29 +01003672
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003673 spin_unlock_bh(&rx->local->rx_path_lock);
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003674}
Johannes Berg571ecf62007-07-27 15:43:22 +02003675
Johannes Berg4406c372010-09-24 11:21:06 +02003676static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx)
Johannes Berg58905292008-01-31 19:48:25 +01003677{
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003678 struct sk_buff_head reorder_release;
Johannes Berg58905292008-01-31 19:48:25 +01003679 ieee80211_rx_result res = RX_DROP_MONITOR;
3680
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003681 __skb_queue_head_init(&reorder_release);
3682
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02003683#define CALL_RXH(rxh) \
3684 do { \
3685 res = rxh(rx); \
3686 if (res != RX_CONTINUE) \
Johannes Berg2569a822009-11-25 17:46:17 +01003687 goto rxh_next; \
Johannes Berg8ebaa5b2016-03-31 20:02:04 +03003688 } while (0)
Johannes Berg58905292008-01-31 19:48:25 +01003689
Johannes Berg8ebaa5b2016-03-31 20:02:04 +03003690 CALL_RXH(ieee80211_rx_h_check_dup);
3691 CALL_RXH(ieee80211_rx_h_check);
Johannes Berg2569a822009-11-25 17:46:17 +01003692
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003693 ieee80211_rx_reorder_ampdu(rx, &reorder_release);
Johannes Berg2569a822009-11-25 17:46:17 +01003694
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003695 ieee80211_rx_handlers(rx, &reorder_release);
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003696 return;
Johannes Berg49461622008-06-30 15:10:45 +02003697
Johannes Berg2569a822009-11-25 17:46:17 +01003698 rxh_next:
Christian Lamparteraa0c8632010-08-05 01:36:04 +02003699 ieee80211_rx_handlers_result(rx, res);
3700
3701#undef CALL_RXH
Johannes Berg58905292008-01-31 19:48:25 +01003702}
3703
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02003704/*
Johannes Bergdd318572010-11-29 11:09:16 +01003705 * This function makes calls into the RX path, therefore
3706 * it has to be invoked under RCU read lock.
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02003707 */
3708void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid)
3709{
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003710 struct sk_buff_head frames;
Johannes Berg554891e2010-09-24 12:38:25 +02003711 struct ieee80211_rx_data rx = {
3712 .sta = sta,
3713 .sdata = sta->sdata,
3714 .local = sta->local,
Johannes Berg9e262972011-07-07 18:45:03 +02003715 /* This is OK -- must be QoS data frame */
3716 .security_idx = tid,
3717 .seqno_idx = tid,
Johannes Bergaf9f9b22015-06-11 16:02:32 +02003718 .napi = NULL, /* must be NULL to not have races */
Johannes Berg554891e2010-09-24 12:38:25 +02003719 };
Christian Lamparter2c15a0c2010-08-24 19:22:42 +02003720 struct tid_ampdu_rx *tid_agg_rx;
3721
3722 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
3723 if (!tid_agg_rx)
3724 return;
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02003725
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003726 __skb_queue_head_init(&frames);
3727
Christian Lamparter2c15a0c2010-08-24 19:22:42 +02003728 spin_lock(&tid_agg_rx->reorder_lock);
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003729 ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames);
Christian Lamparter2c15a0c2010-08-24 19:22:42 +02003730 spin_unlock(&tid_agg_rx->reorder_lock);
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02003731
Emmanuel Grumbachb497de62015-04-20 22:53:38 +03003732 if (!skb_queue_empty(&frames)) {
3733 struct ieee80211_event event = {
3734 .type = BA_FRAME_TIMEOUT,
3735 .u.ba.tid = tid,
3736 .u.ba.sta = &sta->sta,
3737 };
3738 drv_event_callback(rx.local, rx.sdata, &event);
3739 }
3740
Christian Lamparterf9e124f2013-02-04 17:44:44 +00003741 ieee80211_rx_handlers(&rx, &frames);
Christian Lamparter2bff8ebf2010-08-05 01:36:41 +02003742}
3743
Sara Sharon06470f72016-01-28 16:19:25 +02003744void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid,
3745 u16 ssn, u64 filtered,
3746 u16 received_mpdus)
3747{
3748 struct sta_info *sta;
3749 struct tid_ampdu_rx *tid_agg_rx;
3750 struct sk_buff_head frames;
3751 struct ieee80211_rx_data rx = {
3752 /* This is OK -- must be QoS data frame */
3753 .security_idx = tid,
3754 .seqno_idx = tid,
3755 };
3756 int i, diff;
3757
3758 if (WARN_ON(!pubsta || tid >= IEEE80211_NUM_TIDS))
3759 return;
3760
3761 __skb_queue_head_init(&frames);
3762
3763 sta = container_of(pubsta, struct sta_info, sta);
3764
3765 rx.sta = sta;
3766 rx.sdata = sta->sdata;
3767 rx.local = sta->local;
3768
3769 rcu_read_lock();
3770 tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
3771 if (!tid_agg_rx)
3772 goto out;
3773
3774 spin_lock_bh(&tid_agg_rx->reorder_lock);
3775
3776 if (received_mpdus >= IEEE80211_SN_MODULO >> 1) {
3777 int release;
3778
3779 /* release all frames in the reorder buffer */
3780 release = (tid_agg_rx->head_seq_num + tid_agg_rx->buf_size) %
3781 IEEE80211_SN_MODULO;
3782 ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx,
3783 release, &frames);
3784 /* update ssn to match received ssn */
3785 tid_agg_rx->head_seq_num = ssn;
3786 } else {
3787 ieee80211_release_reorder_frames(sta->sdata, tid_agg_rx, ssn,
3788 &frames);
3789 }
3790
3791 /* handle the case that received ssn is behind the mac ssn.
3792 * it can be tid_agg_rx->buf_size behind and still be valid */
3793 diff = (tid_agg_rx->head_seq_num - ssn) & IEEE80211_SN_MASK;
3794 if (diff >= tid_agg_rx->buf_size) {
3795 tid_agg_rx->reorder_buf_filtered = 0;
3796 goto release;
3797 }
3798 filtered = filtered >> diff;
3799 ssn += diff;
3800
3801 /* update bitmap */
3802 for (i = 0; i < tid_agg_rx->buf_size; i++) {
3803 int index = (ssn + i) % tid_agg_rx->buf_size;
3804
3805 tid_agg_rx->reorder_buf_filtered &= ~BIT_ULL(index);
3806 if (filtered & BIT_ULL(i))
3807 tid_agg_rx->reorder_buf_filtered |= BIT_ULL(index);
3808 }
3809
3810 /* now process also frames that the filter marking released */
3811 ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames);
3812
3813release:
3814 spin_unlock_bh(&tid_agg_rx->reorder_lock);
3815
3816 ieee80211_rx_handlers(&rx, &frames);
3817
3818 out:
3819 rcu_read_unlock();
3820}
3821EXPORT_SYMBOL(ieee80211_mark_rx_ba_filtered_frames);
3822
Johannes Berg571ecf62007-07-27 15:43:22 +02003823/* main receive path */
3824
Johannes Berga58fbe12015-04-22 15:08:39 +02003825static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx)
Johannes Berg23a24de2007-07-27 15:43:22 +02003826{
Johannes Berg20b01f82010-09-24 11:21:05 +02003827 struct ieee80211_sub_if_data *sdata = rx->sdata;
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01003828 struct sk_buff *skb = rx->skb;
Johannes Berga58fbe12015-04-22 15:08:39 +02003829 struct ieee80211_hdr *hdr = (void *)skb->data;
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01003830 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
3831 u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type);
Luca Coelhoe5f2e062017-04-26 10:58:54 +03003832 bool multicast = is_multicast_ether_addr(hdr->addr1);
Johannes Berg23a24de2007-07-27 15:43:22 +02003833
Johannes Berg51fb61e2007-12-19 01:31:27 +01003834 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +02003835 case NL80211_IFTYPE_STATION:
Johannes Berg9bc383d2009-11-19 11:55:19 +01003836 if (!bssid && !sdata->u.mgd.use_4addr)
Johannes Berg3c2723f52014-01-07 16:23:24 +01003837 return false;
Johannes Berg588f7d32019-02-13 15:13:30 +01003838 if (ieee80211_is_robust_mgmt_frame(skb) && !rx->sta)
3839 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003840 if (multicast)
3841 return true;
3842 return ether_addr_equal(sdata->vif.addr, hdr->addr1);
Johannes Berg05c914f2008-09-11 00:01:58 +02003843 case NL80211_IFTYPE_ADHOC:
Johannes Berg23a24de2007-07-27 15:43:22 +02003844 if (!bssid)
Johannes Berg3c2723f52014-01-07 16:23:24 +01003845 return false;
Felix Fietkau6329b8d2013-09-17 11:15:43 +02003846 if (ether_addr_equal(sdata->vif.addr, hdr->addr2) ||
3847 ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2))
Johannes Berg3c2723f52014-01-07 16:23:24 +01003848 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003849 if (ieee80211_is_beacon(hdr->frame_control))
Johannes Berg3c2723f52014-01-07 16:23:24 +01003850 return true;
Johannes Berga58fbe12015-04-22 15:08:39 +02003851 if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid))
Johannes Berg3c2723f52014-01-07 16:23:24 +01003852 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003853 if (!multicast &&
3854 !ether_addr_equal(sdata->vif.addr, hdr->addr1))
Johannes Bergdf140462015-04-22 14:40:58 +02003855 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003856 if (!rx->sta) {
Jouni Malinen0fb8ca42008-12-12 14:38:33 +02003857 int rate_idx;
Johannes Bergda6a4352017-04-26 12:14:59 +02003858 if (status->encoding != RX_ENC_LEGACY)
Johannes Berg56146182012-11-09 15:07:02 +01003859 rate_idx = 0; /* TODO: HT/VHT rates */
Jouni Malinen0fb8ca42008-12-12 14:38:33 +02003860 else
Johannes Bergeb9fb5b82009-11-16 13:58:20 +01003861 rate_idx = status->rate_idx;
Johannes Berg8bf11d82011-12-15 11:17:37 +01003862 ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2,
3863 BIT(rate_idx));
Jouni Malinen0fb8ca42008-12-12 14:38:33 +02003864 }
Johannes Berga58fbe12015-04-22 15:08:39 +02003865 return true;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01003866 case NL80211_IFTYPE_OCB:
3867 if (!bssid)
3868 return false;
Bertold Van den Berghcc117292015-08-05 16:02:42 +02003869 if (!ieee80211_is_data_present(hdr->frame_control))
Rostislav Lisovy239281f2014-11-03 10:33:19 +01003870 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003871 if (!is_broadcast_ether_addr(bssid))
Rostislav Lisovy239281f2014-11-03 10:33:19 +01003872 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003873 if (!multicast &&
3874 !ether_addr_equal(sdata->dev->dev_addr, hdr->addr1))
Johannes Bergdf140462015-04-22 14:40:58 +02003875 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003876 if (!rx->sta) {
Rostislav Lisovy239281f2014-11-03 10:33:19 +01003877 int rate_idx;
Johannes Bergda6a4352017-04-26 12:14:59 +02003878 if (status->encoding != RX_ENC_LEGACY)
Rostislav Lisovy239281f2014-11-03 10:33:19 +01003879 rate_idx = 0; /* TODO: HT rates */
3880 else
3881 rate_idx = status->rate_idx;
3882 ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2,
3883 BIT(rate_idx));
3884 }
Johannes Berga58fbe12015-04-22 15:08:39 +02003885 return true;
Johannes Berg05c914f2008-09-11 00:01:58 +02003886 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg736a80b2018-01-04 15:51:53 +01003887 if (ether_addr_equal(sdata->vif.addr, hdr->addr2))
3888 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003889 if (multicast)
3890 return true;
3891 return ether_addr_equal(sdata->vif.addr, hdr->addr1);
Johannes Berg05c914f2008-09-11 00:01:58 +02003892 case NL80211_IFTYPE_AP_VLAN:
3893 case NL80211_IFTYPE_AP:
Johannes Berga58fbe12015-04-22 15:08:39 +02003894 if (!bssid)
3895 return ether_addr_equal(sdata->vif.addr, hdr->addr1);
3896
3897 if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) {
Johannes Berg3df6eae2011-12-06 10:39:40 +01003898 /*
3899 * Accept public action frames even when the
3900 * BSSID doesn't match, this is used for P2P
3901 * and location updates. Note that mac80211
3902 * itself never looks at these frames.
3903 */
Johannes Berg2b9ccd42013-05-13 16:42:40 +02003904 if (!multicast &&
3905 !ether_addr_equal(sdata->vif.addr, hdr->addr1))
Johannes Berg3c2723f52014-01-07 16:23:24 +01003906 return false;
Johannes Bergd48b2962012-07-06 22:19:27 +02003907 if (ieee80211_is_public_action(hdr, skb->len))
Johannes Berg3c2723f52014-01-07 16:23:24 +01003908 return true;
Johannes Berg5c900672015-04-22 14:48:34 +02003909 return ieee80211_is_beacon(hdr->frame_control);
Johannes Berga58fbe12015-04-22 15:08:39 +02003910 }
3911
3912 if (!ieee80211_has_tods(hdr->frame_control)) {
Arik Nemtsovdb8e1732014-07-17 17:14:30 +03003913 /* ignore data frames to TDLS-peers */
3914 if (ieee80211_is_data(hdr->frame_control))
3915 return false;
3916 /* ignore action frames to TDLS-peers */
3917 if (ieee80211_is_action(hdr->frame_control) &&
Jouni Malinen1ec7bae2016-03-01 00:29:00 +02003918 !is_broadcast_ether_addr(bssid) &&
Arik Nemtsovdb8e1732014-07-17 17:14:30 +03003919 !ether_addr_equal(bssid, hdr->addr1))
3920 return false;
Johannes Berg23a24de2007-07-27 15:43:22 +02003921 }
Johannes Berg3018e942017-04-20 21:32:16 +02003922
3923 /*
3924 * 802.11-2016 Table 9-26 says that for data frames, A1 must be
3925 * the BSSID - we've checked that already but may have accepted
3926 * the wildcard (ff:ff:ff:ff:ff:ff).
3927 *
3928 * It also says:
3929 * The BSSID of the Data frame is determined as follows:
3930 * a) If the STA is contained within an AP or is associated
3931 * with an AP, the BSSID is the address currently in use
3932 * by the STA contained in the AP.
3933 *
3934 * So we should not accept data frames with an address that's
3935 * multicast.
3936 *
3937 * Accepting it also opens a security problem because stations
3938 * could encrypt it with the GTK and inject traffic that way.
3939 */
3940 if (ieee80211_is_data(hdr->frame_control) && multicast)
3941 return false;
3942
Johannes Berga58fbe12015-04-22 15:08:39 +02003943 return true;
Johannes Berg05c914f2008-09-11 00:01:58 +02003944 case NL80211_IFTYPE_WDS:
Harvey Harrisona7767f92008-07-02 16:30:51 -07003945 if (bssid || !ieee80211_is_data(hdr->frame_control))
Johannes Berg3c2723f52014-01-07 16:23:24 +01003946 return false;
Johannes Berga58fbe12015-04-22 15:08:39 +02003947 return ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2);
Johannes Bergf142c6b2012-06-18 20:07:15 +02003948 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Berga58fbe12015-04-22 15:08:39 +02003949 return ieee80211_is_public_action(hdr, skb->len) ||
3950 ieee80211_is_probe_req(hdr->frame_control) ||
3951 ieee80211_is_probe_resp(hdr->frame_control) ||
3952 ieee80211_is_beacon(hdr->frame_control);
Ayala Bekercb3b7d82016-09-20 17:31:13 +03003953 case NL80211_IFTYPE_NAN:
3954 /* Currently no frames on NAN interface are allowed */
3955 return false;
Johannes Berg2ca27bc2010-09-16 14:58:23 +02003956 default:
Johannes Bergfb1c1cd2007-09-26 15:19:43 +02003957 break;
Johannes Berg23a24de2007-07-27 15:43:22 +02003958 }
3959
Johannes Berga58fbe12015-04-22 15:08:39 +02003960 WARN_ON_ONCE(1);
3961 return false;
Johannes Berg23a24de2007-07-27 15:43:22 +02003962}
3963
Johannes Berg49ddf8e2016-03-31 20:02:10 +03003964void ieee80211_check_fast_rx(struct sta_info *sta)
3965{
3966 struct ieee80211_sub_if_data *sdata = sta->sdata;
3967 struct ieee80211_local *local = sdata->local;
3968 struct ieee80211_key *key;
3969 struct ieee80211_fast_rx fastrx = {
3970 .dev = sdata->dev,
3971 .vif_type = sdata->vif.type,
3972 .control_port_protocol = sdata->control_port_protocol,
3973 }, *old, *new = NULL;
3974 bool assign = false;
3975
3976 /* use sparse to check that we don't return without updating */
3977 __acquire(check_fast_rx);
3978
3979 BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != sizeof(rfc1042_header));
3980 BUILD_BUG_ON(sizeof(fastrx.rfc1042_hdr) != ETH_ALEN);
3981 ether_addr_copy(fastrx.rfc1042_hdr, rfc1042_header);
3982 ether_addr_copy(fastrx.vif_addr, sdata->vif.addr);
3983
Johannes Bergc9c59622016-03-31 20:02:11 +03003984 fastrx.uses_rss = ieee80211_hw_check(&local->hw, USES_RSS);
3985
Johannes Berg49ddf8e2016-03-31 20:02:10 +03003986 /* fast-rx doesn't do reordering */
3987 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
3988 !ieee80211_hw_check(&local->hw, SUPPORTS_REORDERING_BUFFER))
3989 goto clear;
3990
3991 switch (sdata->vif.type) {
3992 case NL80211_IFTYPE_STATION:
Johannes Berg49ddf8e2016-03-31 20:02:10 +03003993 if (sta->sta.tdls) {
3994 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1);
3995 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3996 fastrx.expected_ds_bits = 0;
3997 } else {
3998 fastrx.sta_notify = sdata->u.mgd.probe_send_count > 0;
3999 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr1);
4000 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr3);
4001 fastrx.expected_ds_bits =
4002 cpu_to_le16(IEEE80211_FCTL_FROMDS);
4003 }
Felix Fietkau1d870162018-02-23 10:06:05 +01004004
Felix Fietkau9251a472018-02-23 13:55:50 +01004005 if (sdata->u.mgd.use_4addr && !sta->sta.tdls) {
4006 fastrx.expected_ds_bits |=
4007 cpu_to_le16(IEEE80211_FCTL_TODS);
4008 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr3);
4009 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr4);
4010 }
4011
Felix Fietkau1d870162018-02-23 10:06:05 +01004012 if (!sdata->u.mgd.powersave)
4013 break;
4014
4015 /* software powersave is a huge mess, avoid all of it */
4016 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
4017 goto clear;
4018 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
4019 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
4020 goto clear;
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004021 break;
4022 case NL80211_IFTYPE_AP_VLAN:
4023 case NL80211_IFTYPE_AP:
4024 /* parallel-rx requires this, at least with calls to
4025 * ieee80211_sta_ps_transition()
4026 */
4027 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
4028 goto clear;
4029 fastrx.da_offs = offsetof(struct ieee80211_hdr, addr3);
4030 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr2);
4031 fastrx.expected_ds_bits = cpu_to_le16(IEEE80211_FCTL_TODS);
4032
4033 fastrx.internal_forward =
4034 !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
4035 (sdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
4036 !sdata->u.vlan.sta);
Felix Fietkau59cae5b2018-02-23 10:06:04 +01004037
4038 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
4039 sdata->u.vlan.sta) {
4040 fastrx.expected_ds_bits |=
4041 cpu_to_le16(IEEE80211_FCTL_FROMDS);
4042 fastrx.sa_offs = offsetof(struct ieee80211_hdr, addr4);
4043 fastrx.internal_forward = 0;
4044 }
4045
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004046 break;
4047 default:
4048 goto clear;
4049 }
4050
4051 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
4052 goto clear;
4053
4054 rcu_read_lock();
4055 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4056 if (key) {
4057 switch (key->conf.cipher) {
4058 case WLAN_CIPHER_SUITE_TKIP:
4059 /* we don't want to deal with MMIC in fast-rx */
4060 goto clear_rcu;
4061 case WLAN_CIPHER_SUITE_CCMP:
4062 case WLAN_CIPHER_SUITE_CCMP_256:
4063 case WLAN_CIPHER_SUITE_GCMP:
4064 case WLAN_CIPHER_SUITE_GCMP_256:
4065 break;
4066 default:
Alexander Wetzel96fc6ef2019-03-19 21:34:08 +01004067 /* We also don't want to deal with
4068 * WEP or cipher scheme.
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004069 */
4070 goto clear_rcu;
4071 }
4072
4073 fastrx.key = true;
4074 fastrx.icv_len = key->conf.icv_len;
4075 }
4076
4077 assign = true;
4078 clear_rcu:
4079 rcu_read_unlock();
4080 clear:
4081 __release(check_fast_rx);
4082
4083 if (assign)
4084 new = kmemdup(&fastrx, sizeof(fastrx), GFP_KERNEL);
4085
4086 spin_lock_bh(&sta->lock);
4087 old = rcu_dereference_protected(sta->fast_rx, true);
4088 rcu_assign_pointer(sta->fast_rx, new);
4089 spin_unlock_bh(&sta->lock);
4090
4091 if (old)
4092 kfree_rcu(old, rcu_head);
4093}
4094
4095void ieee80211_clear_fast_rx(struct sta_info *sta)
4096{
4097 struct ieee80211_fast_rx *old;
4098
4099 spin_lock_bh(&sta->lock);
4100 old = rcu_dereference_protected(sta->fast_rx, true);
4101 RCU_INIT_POINTER(sta->fast_rx, NULL);
4102 spin_unlock_bh(&sta->lock);
4103
4104 if (old)
4105 kfree_rcu(old, rcu_head);
4106}
4107
4108void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata)
4109{
4110 struct ieee80211_local *local = sdata->local;
4111 struct sta_info *sta;
4112
4113 lockdep_assert_held(&local->sta_mtx);
4114
4115 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4116 if (sdata != sta->sdata &&
4117 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
4118 continue;
4119 ieee80211_check_fast_rx(sta);
4120 }
4121}
4122
4123void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata)
4124{
4125 struct ieee80211_local *local = sdata->local;
4126
4127 mutex_lock(&local->sta_mtx);
4128 __ieee80211_check_fast_rx_iface(sdata);
4129 mutex_unlock(&local->sta_mtx);
4130}
4131
4132static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
4133 struct ieee80211_fast_rx *fast_rx)
4134{
4135 struct sk_buff *skb = rx->skb;
4136 struct ieee80211_hdr *hdr = (void *)skb->data;
4137 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
4138 struct sta_info *sta = rx->sta;
4139 int orig_len = skb->len;
Felix Fietkau24bba072018-02-27 13:03:07 +01004140 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
4141 int snap_offs = hdrlen;
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004142 struct {
4143 u8 snap[sizeof(rfc1042_header)];
4144 __be16 proto;
4145 } *payload __aligned(2);
4146 struct {
4147 u8 da[ETH_ALEN];
4148 u8 sa[ETH_ALEN];
4149 } addrs __aligned(2);
Johannes Bergc9c59622016-03-31 20:02:11 +03004150 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
4151
4152 if (fast_rx->uses_rss)
4153 stats = this_cpu_ptr(sta->pcpu_rx_stats);
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004154
4155 /* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
4156 * to a common data structure; drivers can implement that per queue
4157 * but we don't have that information in mac80211
4158 */
4159 if (!(status->flag & RX_FLAG_DUP_VALIDATED))
4160 return false;
4161
4162#define FAST_RX_CRYPT_FLAGS (RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
4163
4164 /* If using encryption, we also need to have:
4165 * - PN_VALIDATED: similar, but the implementation is tricky
4166 * - DECRYPTED: necessary for PN_VALIDATED
4167 */
4168 if (fast_rx->key &&
4169 (status->flag & FAST_RX_CRYPT_FLAGS) != FAST_RX_CRYPT_FLAGS)
4170 return false;
4171
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004172 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
4173 return false;
4174
4175 if (unlikely(ieee80211_is_frag(hdr)))
4176 return false;
4177
4178 /* Since our interface address cannot be multicast, this
4179 * implicitly also rejects multicast frames without the
4180 * explicit check.
4181 *
4182 * We shouldn't get any *data* frames not addressed to us
4183 * (AP mode will accept multicast *management* frames), but
4184 * punting here will make it go through the full checks in
4185 * ieee80211_accept_frame().
4186 */
4187 if (!ether_addr_equal(fast_rx->vif_addr, hdr->addr1))
4188 return false;
4189
4190 if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FROMDS |
4191 IEEE80211_FCTL_TODS)) !=
4192 fast_rx->expected_ds_bits)
Felix Fietkaub323ac12018-02-23 10:06:03 +01004193 return false;
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004194
4195 /* assign the key to drop unencrypted frames (later)
4196 * and strip the IV/MIC if necessary
4197 */
4198 if (fast_rx->key && !(status->flag & RX_FLAG_IV_STRIPPED)) {
4199 /* GCMP header length is the same */
4200 snap_offs += IEEE80211_CCMP_HDR_LEN;
4201 }
4202
Felix Fietkau24bba072018-02-27 13:03:07 +01004203 if (!(status->rx_flags & IEEE80211_RX_AMSDU)) {
4204 if (!pskb_may_pull(skb, snap_offs + sizeof(*payload)))
4205 goto drop;
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004206
Felix Fietkau24bba072018-02-27 13:03:07 +01004207 payload = (void *)(skb->data + snap_offs);
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004208
Felix Fietkau24bba072018-02-27 13:03:07 +01004209 if (!ether_addr_equal(payload->snap, fast_rx->rfc1042_hdr))
4210 return false;
4211
4212 /* Don't handle these here since they require special code.
4213 * Accept AARP and IPX even though they should come with a
4214 * bridge-tunnel header - but if we get them this way then
4215 * there's little point in discarding them.
4216 */
4217 if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
4218 payload->proto == fast_rx->control_port_protocol))
4219 return false;
4220 }
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004221
4222 /* after this point, don't punt to the slowpath! */
4223
4224 if (rx->key && !(status->flag & RX_FLAG_MIC_STRIPPED) &&
4225 pskb_trim(skb, skb->len - fast_rx->icv_len))
4226 goto drop;
4227
4228 if (unlikely(fast_rx->sta_notify)) {
4229 ieee80211_sta_rx_notify(rx->sdata, hdr);
4230 fast_rx->sta_notify = false;
4231 }
4232
4233 /* statistics part of ieee80211_rx_h_sta_process() */
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004234 if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
Johannes Bergc9c59622016-03-31 20:02:11 +03004235 stats->last_signal = status->signal;
4236 if (!fast_rx->uses_rss)
4237 ewma_signal_add(&sta->rx_stats_avg.signal,
4238 -status->signal);
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004239 }
4240
4241 if (status->chains) {
4242 int i;
4243
Johannes Bergc9c59622016-03-31 20:02:11 +03004244 stats->chains = status->chains;
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004245 for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) {
4246 int signal = status->chain_signal[i];
4247
4248 if (!(status->chains & BIT(i)))
4249 continue;
4250
Johannes Bergc9c59622016-03-31 20:02:11 +03004251 stats->chain_signal_last[i] = signal;
4252 if (!fast_rx->uses_rss)
4253 ewma_signal_add(&sta->rx_stats_avg.chain_signal[i],
4254 -signal);
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004255 }
4256 }
4257 /* end of statistics */
4258
4259 if (rx->key && !ieee80211_has_protected(hdr->frame_control))
4260 goto drop;
4261
Felix Fietkau24bba072018-02-27 13:03:07 +01004262 if (status->rx_flags & IEEE80211_RX_AMSDU) {
4263 if (__ieee80211_rx_h_amsdu(rx, snap_offs - hdrlen) !=
4264 RX_QUEUED)
4265 goto drop;
4266
4267 return true;
4268 }
4269
4270 stats->last_rx = jiffies;
4271 stats->last_rate = sta_stats_encode_rate(status);
4272
4273 stats->fragments++;
4274 stats->packets++;
4275
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004276 /* do the header conversion - first grab the addresses */
4277 ether_addr_copy(addrs.da, skb->data + fast_rx->da_offs);
4278 ether_addr_copy(addrs.sa, skb->data + fast_rx->sa_offs);
4279 /* remove the SNAP but leave the ethertype */
4280 skb_pull(skb, snap_offs + sizeof(rfc1042_header));
4281 /* push the addresses in front */
4282 memcpy(skb_push(skb, sizeof(addrs)), &addrs, sizeof(addrs));
4283
4284 skb->dev = fast_rx->dev;
4285
4286 ieee80211_rx_stats(fast_rx->dev, skb->len);
4287
4288 /* The seqno index has the same property as needed
4289 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
4290 * for non-QoS-data frames. Here we know it's a data
4291 * frame, so count MSDUs.
4292 */
Johannes Bergc9c59622016-03-31 20:02:11 +03004293 u64_stats_update_begin(&stats->syncp);
4294 stats->msdu[rx->seqno_idx]++;
4295 stats->bytes += orig_len;
4296 u64_stats_update_end(&stats->syncp);
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004297
4298 if (fast_rx->internal_forward) {
Johannes Bergeeb0d562016-12-14 16:47:43 +01004299 struct sk_buff *xmit_skb = NULL;
Johannes Berg42dca5e2018-10-09 10:00:21 +02004300 if (is_multicast_ether_addr(addrs.da)) {
Johannes Bergeeb0d562016-12-14 16:47:43 +01004301 xmit_skb = skb_copy(skb, GFP_ATOMIC);
Johannes Berg42dca5e2018-10-09 10:00:21 +02004302 } else if (!ether_addr_equal(addrs.da, addrs.sa) &&
4303 sta_info_get(rx->sdata, addrs.da)) {
Johannes Bergeeb0d562016-12-14 16:47:43 +01004304 xmit_skb = skb;
4305 skb = NULL;
4306 }
4307
4308 if (xmit_skb) {
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004309 /*
4310 * Send to wireless media and increase priority by 256
4311 * to keep the received priority instead of
4312 * reclassifying the frame (see cfg80211_classify8021d).
4313 */
Johannes Bergeeb0d562016-12-14 16:47:43 +01004314 xmit_skb->priority += 256;
4315 xmit_skb->protocol = htons(ETH_P_802_3);
4316 skb_reset_network_header(xmit_skb);
4317 skb_reset_mac_header(xmit_skb);
4318 dev_queue_xmit(xmit_skb);
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004319 }
Johannes Bergeeb0d562016-12-14 16:47:43 +01004320
4321 if (!skb)
4322 return true;
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004323 }
4324
4325 /* deliver to local stack */
4326 skb->protocol = eth_type_trans(skb, fast_rx->dev);
4327 memset(skb->cb, 0, sizeof(skb->cb));
4328 if (rx->napi)
4329 napi_gro_receive(rx->napi, skb);
4330 else
4331 netif_receive_skb(skb);
4332
4333 return true;
4334 drop:
4335 dev_kfree_skb(skb);
Johannes Bergc9c59622016-03-31 20:02:11 +03004336 stats->dropped++;
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004337 return true;
4338}
4339
Johannes Berg571ecf62007-07-27 15:43:22 +02004340/*
Johannes Berg4406c372010-09-24 11:21:06 +02004341 * This function returns whether or not the SKB
4342 * was destined for RX processing or not, which,
4343 * if consume is true, is equivalent to whether
4344 * or not the skb was consumed.
4345 */
4346static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx,
4347 struct sk_buff *skb, bool consume)
4348{
4349 struct ieee80211_local *local = rx->local;
4350 struct ieee80211_sub_if_data *sdata = rx->sdata;
Johannes Berg4406c372010-09-24 11:21:06 +02004351
4352 rx->skb = skb;
Johannes Berg4406c372010-09-24 11:21:06 +02004353
Johannes Berg49ddf8e2016-03-31 20:02:10 +03004354 /* See if we can do fast-rx; if we have to copy we already lost,
4355 * so punt in that case. We should never have to deliver a data
4356 * frame to multiple interfaces anyway.
4357 *
4358 * We skip the ieee80211_accept_frame() call and do the necessary
4359 * checking inside ieee80211_invoke_fast_rx().
4360 */
4361 if (consume && rx->sta) {
4362 struct ieee80211_fast_rx *fast_rx;
4363
4364 fast_rx = rcu_dereference(rx->sta->fast_rx);
4365 if (fast_rx && ieee80211_invoke_fast_rx(rx, fast_rx))
4366 return true;
4367 }
4368
Johannes Berga58fbe12015-04-22 15:08:39 +02004369 if (!ieee80211_accept_frame(rx))
Johannes Berg4406c372010-09-24 11:21:06 +02004370 return false;
4371
Johannes Berg4406c372010-09-24 11:21:06 +02004372 if (!consume) {
4373 skb = skb_copy(skb, GFP_ATOMIC);
4374 if (!skb) {
4375 if (net_ratelimit())
4376 wiphy_debug(local->hw.wiphy,
Ben Greearb305dae2011-01-08 10:30:54 -08004377 "failed to copy skb for %s\n",
Johannes Berg4406c372010-09-24 11:21:06 +02004378 sdata->name);
4379 return true;
4380 }
4381
4382 rx->skb = skb;
4383 }
4384
4385 ieee80211_invoke_rx_handlers(rx);
4386 return true;
4387}
4388
4389/*
Zhao, Gang6b59db72014-04-21 12:52:59 +08004390 * This is the actual Rx frames handler. as it belongs to Rx path it must
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004391 * be called with rcu_read_lock protection.
Johannes Berg571ecf62007-07-27 15:43:22 +02004392 */
Ron Rindjunsky71ebb4a2008-01-21 12:39:12 +02004393static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
Johannes Bergd63b5482016-03-31 20:02:02 +03004394 struct ieee80211_sta *pubsta,
Johannes Bergaf9f9b22015-06-11 16:02:32 +02004395 struct sk_buff *skb,
4396 struct napi_struct *napi)
Johannes Berg571ecf62007-07-27 15:43:22 +02004397{
4398 struct ieee80211_local *local = hw_to_local(hw);
4399 struct ieee80211_sub_if_data *sdata;
Johannes Berg571ecf62007-07-27 15:43:22 +02004400 struct ieee80211_hdr *hdr;
Zhu Yie3cf8b3f2010-03-29 17:35:07 +08004401 __le16 fc;
Johannes Berg5cf121c2008-02-25 16:27:43 +01004402 struct ieee80211_rx_data rx;
Johannes Berg4406c372010-09-24 11:21:06 +02004403 struct ieee80211_sub_if_data *prev;
Herbert Xu83e7e4c2016-09-19 19:00:10 +08004404 struct rhlist_head *tmp;
Zhu Yie3cf8b3f2010-03-29 17:35:07 +08004405 int err = 0;
Johannes Berg571ecf62007-07-27 15:43:22 +02004406
Zhu Yie3cf8b3f2010-03-29 17:35:07 +08004407 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
Johannes Berg571ecf62007-07-27 15:43:22 +02004408 memset(&rx, 0, sizeof(rx));
4409 rx.skb = skb;
4410 rx.local = local;
Johannes Bergaf9f9b22015-06-11 16:02:32 +02004411 rx.napi = napi;
Johannes Berg72abd812007-09-17 01:29:22 -04004412
Zhu Yie3cf8b3f2010-03-29 17:35:07 +08004413 if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
Johannes Bergc206ca62015-04-22 20:47:28 +02004414 I802_DEBUG_INC(local->dot11ReceivedFragmentCount);
Johannes Berg571ecf62007-07-27 15:43:22 +02004415
Johannes Berg4a4f1a52012-10-26 00:33:36 +02004416 if (ieee80211_is_mgmt(fc)) {
4417 /* drop frame if too short for header */
4418 if (skb->len < ieee80211_hdrlen(fc))
4419 err = -ENOBUFS;
4420 else
4421 err = skb_linearize(skb);
4422 } else {
Zhu Yie3cf8b3f2010-03-29 17:35:07 +08004423 err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
Johannes Berg4a4f1a52012-10-26 00:33:36 +02004424 }
Zhu Yie3cf8b3f2010-03-29 17:35:07 +08004425
4426 if (err) {
4427 dev_kfree_skb(skb);
4428 return;
4429 }
4430
4431 hdr = (struct ieee80211_hdr *)skb->data;
Johannes Berg38f37142008-01-29 17:07:43 +01004432 ieee80211_parse_qos(&rx);
Johannes Bergd1c3a372009-01-07 00:26:10 +01004433 ieee80211_verify_alignment(&rx);
Johannes Berg38f37142008-01-29 17:07:43 +01004434
Johannes Bergd48b2962012-07-06 22:19:27 +02004435 if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) ||
4436 ieee80211_is_beacon(hdr->frame_control)))
4437 ieee80211_scan_rx(local, skb);
4438
Johannes Berg19d19e92017-02-27 09:38:11 +01004439 if (ieee80211_is_data(fc)) {
Johannes Bergd63b5482016-03-31 20:02:02 +03004440 struct sta_info *sta, *prev_sta;
Johannes Berg7bedd0c2015-02-13 21:55:15 +01004441
Johannes Berg19d19e92017-02-27 09:38:11 +01004442 if (pubsta) {
4443 rx.sta = container_of(pubsta, struct sta_info, sta);
4444 rx.sdata = rx.sta->sdata;
4445 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
4446 return;
4447 goto out;
4448 }
4449
Ben Greear56af3262010-09-23 10:22:24 -07004450 prev_sta = NULL;
Johannes Berg4406c372010-09-24 11:21:06 +02004451
Herbert Xu83e7e4c2016-09-19 19:00:10 +08004452 for_each_sta_info(local, hdr->addr2, sta, tmp) {
Ben Greear56af3262010-09-23 10:22:24 -07004453 if (!prev_sta) {
4454 prev_sta = sta;
4455 continue;
4456 }
4457
4458 rx.sta = prev_sta;
4459 rx.sdata = prev_sta->sdata;
Johannes Berg4406c372010-09-24 11:21:06 +02004460 ieee80211_prepare_and_rx_handle(&rx, skb, false);
Johannes Berg571ecf62007-07-27 15:43:22 +02004461
Ben Greear56af3262010-09-23 10:22:24 -07004462 prev_sta = sta;
Johannes Berg4406c372010-09-24 11:21:06 +02004463 }
Ben Greear56af3262010-09-23 10:22:24 -07004464
4465 if (prev_sta) {
4466 rx.sta = prev_sta;
4467 rx.sdata = prev_sta->sdata;
4468
Johannes Berg4406c372010-09-24 11:21:06 +02004469 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
Ben Greear56af3262010-09-23 10:22:24 -07004470 return;
Senthil Balasubramanian8e26d5a2010-11-30 20:15:38 +05304471 goto out;
Ben Greear56af3262010-09-23 10:22:24 -07004472 }
Johannes Berg4406c372010-09-24 11:21:06 +02004473 }
4474
Johannes Berg4b0dd982010-09-24 11:21:07 +02004475 prev = NULL;
Johannes Berg4406c372010-09-24 11:21:06 +02004476
Johannes Berg4b0dd982010-09-24 11:21:07 +02004477 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4478 if (!ieee80211_sdata_running(sdata))
4479 continue;
Johannes Bergabe60632009-11-25 17:46:18 +01004480
Johannes Berg4b0dd982010-09-24 11:21:07 +02004481 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
4482 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4483 continue;
Johannes Bergabe60632009-11-25 17:46:18 +01004484
Johannes Berg4b0dd982010-09-24 11:21:07 +02004485 /*
4486 * frame is destined for this interface, but if it's
4487 * not also for the previous one we handle that after
4488 * the loop to avoid copying the SKB once too much
4489 */
Johannes Bergb2e77712007-09-26 15:19:39 +02004490
Johannes Berg4b0dd982010-09-24 11:21:07 +02004491 if (!prev) {
Johannes Berg340e11f2007-07-27 15:43:22 +02004492 prev = sdata;
Johannes Berg4b0dd982010-09-24 11:21:07 +02004493 continue;
Johannes Berg8e6f00322007-07-27 15:43:22 +02004494 }
Felix Fietkau4bb29f82010-01-22 00:36:39 +01004495
Johannes Berg7852e362012-01-20 13:55:24 +01004496 rx.sta = sta_info_get_bss(prev, hdr->addr2);
Johannes Berg4b0dd982010-09-24 11:21:07 +02004497 rx.sdata = prev;
4498 ieee80211_prepare_and_rx_handle(&rx, skb, false);
Felix Fietkau4bb29f82010-01-22 00:36:39 +01004499
Johannes Berg4b0dd982010-09-24 11:21:07 +02004500 prev = sdata;
4501 }
Johannes Berg4406c372010-09-24 11:21:06 +02004502
Johannes Berg4b0dd982010-09-24 11:21:07 +02004503 if (prev) {
Johannes Berg7852e362012-01-20 13:55:24 +01004504 rx.sta = sta_info_get_bss(prev, hdr->addr2);
Johannes Berg4b0dd982010-09-24 11:21:07 +02004505 rx.sdata = prev;
4506
4507 if (ieee80211_prepare_and_rx_handle(&rx, skb, true))
4508 return;
Johannes Berg571ecf62007-07-27 15:43:22 +02004509 }
Johannes Berg4406c372010-09-24 11:21:06 +02004510
Senthil Balasubramanian8e26d5a2010-11-30 20:15:38 +05304511 out:
Johannes Berg4406c372010-09-24 11:21:06 +02004512 dev_kfree_skb(skb);
Johannes Berg571ecf62007-07-27 15:43:22 +02004513}
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004514
4515/*
4516 * This is the receive path handler. It is called by a low level driver when an
4517 * 802.11 MPDU is received from the hardware.
4518 */
Johannes Bergd63b5482016-03-31 20:02:02 +03004519void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
4520 struct sk_buff *skb, struct napi_struct *napi)
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004521{
4522 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg8318d782008-01-24 19:38:38 +01004523 struct ieee80211_rate *rate = NULL;
4524 struct ieee80211_supported_band *sband;
Johannes Bergf1d58c22009-06-17 13:13:00 +02004525 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
Johannes Berg8318d782008-01-24 19:38:38 +01004526
Johannes Bergd20ef632009-10-11 15:10:40 +02004527 WARN_ON_ONCE(softirq_count() == 0);
4528
Johannes Berg57fbcce2016-04-12 15:56:15 +02004529 if (WARN_ON(status->band >= NUM_NL80211_BANDS))
Johannes Berg77a980d2009-08-24 11:46:30 +02004530 goto drop;
Johannes Berg8318d782008-01-24 19:38:38 +01004531
4532 sband = local->hw.wiphy->bands[status->band];
Johannes Berg77a980d2009-08-24 11:46:30 +02004533 if (WARN_ON(!sband))
4534 goto drop;
Johannes Berg8318d782008-01-24 19:38:38 +01004535
Johannes Berg89c3a8a2009-07-28 18:10:17 +02004536 /*
4537 * If we're suspending, it is possible although not too likely
4538 * that we'd be receiving frames after having already partially
4539 * quiesced the stack. We can't process such frames then since
4540 * that might, for example, cause stations to be added or other
4541 * driver callbacks be invoked.
4542 */
Johannes Berg77a980d2009-08-24 11:46:30 +02004543 if (unlikely(local->quiescing || local->suspended))
4544 goto drop;
Johannes Berg89c3a8a2009-07-28 18:10:17 +02004545
Arik Nemtsov04800ad2012-06-06 11:25:02 +03004546 /* We might be during a HW reconfig, prevent Rx for the same reason */
4547 if (unlikely(local->in_reconfig))
4548 goto drop;
4549
Johannes Bergea77f122009-08-21 14:44:45 +02004550 /*
4551 * The same happens when we're not even started,
4552 * but that's worth a warning.
4553 */
Johannes Berg77a980d2009-08-24 11:46:30 +02004554 if (WARN_ON(!local->started))
4555 goto drop;
Johannes Bergea77f122009-08-21 14:44:45 +02004556
Johannes Bergfc885182010-07-30 13:23:12 +02004557 if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) {
Luis R. Rodrigueze5d6eb82009-11-09 16:03:22 -05004558 /*
Johannes Bergfc885182010-07-30 13:23:12 +02004559 * Validate the rate, unless a PLCP error means that
4560 * we probably can't have a valid rate here anyway.
Luis R. Rodrigueze5d6eb82009-11-09 16:03:22 -05004561 */
Johannes Bergfc885182010-07-30 13:23:12 +02004562
Johannes Bergda6a4352017-04-26 12:14:59 +02004563 switch (status->encoding) {
4564 case RX_ENC_HT:
Johannes Bergfc885182010-07-30 13:23:12 +02004565 /*
4566 * rate_idx is MCS index, which can be [0-76]
4567 * as documented on:
4568 *
4569 * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
4570 *
4571 * Anything else would be some sort of driver or
4572 * hardware error. The driver should catch hardware
4573 * errors.
4574 */
Johannes Berg444e3802012-09-30 17:08:35 +02004575 if (WARN(status->rate_idx > 76,
Johannes Bergfc885182010-07-30 13:23:12 +02004576 "Rate marked as an HT rate but passed "
4577 "status->rate_idx is not "
4578 "an MCS index [0-76]: %d (0x%02x)\n",
4579 status->rate_idx,
4580 status->rate_idx))
4581 goto drop;
Johannes Bergda6a4352017-04-26 12:14:59 +02004582 break;
4583 case RX_ENC_VHT:
Johannes Berg56146182012-11-09 15:07:02 +01004584 if (WARN_ONCE(status->rate_idx > 9 ||
Johannes Berg8613c942017-04-26 13:51:41 +02004585 !status->nss ||
4586 status->nss > 8,
Johannes Berg56146182012-11-09 15:07:02 +01004587 "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n",
Johannes Berg8613c942017-04-26 13:51:41 +02004588 status->rate_idx, status->nss))
Johannes Berg56146182012-11-09 15:07:02 +01004589 goto drop;
Johannes Bergda6a4352017-04-26 12:14:59 +02004590 break;
Luca Coelho41cbb0f2018-06-09 09:14:44 +03004591 case RX_ENC_HE:
4592 if (WARN_ONCE(status->rate_idx > 11 ||
4593 !status->nss ||
4594 status->nss > 8,
4595 "Rate marked as an HE rate but data is invalid: MCS: %d, NSS: %d\n",
4596 status->rate_idx, status->nss))
4597 goto drop;
4598 break;
Johannes Bergda6a4352017-04-26 12:14:59 +02004599 default:
4600 WARN_ON_ONCE(1);
4601 /* fall through */
4602 case RX_ENC_LEGACY:
Johannes Berg444e3802012-09-30 17:08:35 +02004603 if (WARN_ON(status->rate_idx >= sband->n_bitrates))
Johannes Bergfc885182010-07-30 13:23:12 +02004604 goto drop;
4605 rate = &sband->bitrates[status->rate_idx];
4606 }
Jouni Malinen0fb8ca42008-12-12 14:38:33 +02004607 }
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004608
Johannes Berg554891e2010-09-24 12:38:25 +02004609 status->rx_flags = 0;
4610
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004611 /*
4612 * key references and virtual interfaces are protected using RCU
4613 * and this requires that we are in a read-side RCU section during
4614 * receive processing
4615 */
4616 rcu_read_lock();
4617
4618 /*
4619 * Frames with failed FCS/PLCP checksum are not returned,
4620 * all other frames are returned without radiotap header
4621 * if it was previously present.
4622 * Also, frames with less than 16 bytes are dropped.
4623 */
Johannes Bergf1d58c22009-06-17 13:13:00 +02004624 skb = ieee80211_rx_monitor(local, skb, rate);
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004625 if (!skb) {
4626 rcu_read_unlock();
4627 return;
4628 }
4629
Johannes Berge1e54062010-11-30 08:58:45 +01004630 ieee80211_tpt_led_trig_rx(local,
4631 ((struct ieee80211_hdr *)skb->data)->frame_control,
4632 skb->len);
Johannes Bergd63b5482016-03-31 20:02:02 +03004633
4634 __ieee80211_rx_handle_packet(hw, pubsta, skb, napi);
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004635
4636 rcu_read_unlock();
Johannes Berg77a980d2009-08-24 11:46:30 +02004637
4638 return;
4639 drop:
4640 kfree_skb(skb);
Ron Rindjunsky6368e4b2007-12-24 13:36:39 +02004641}
Johannes Bergaf9f9b22015-06-11 16:02:32 +02004642EXPORT_SYMBOL(ieee80211_rx_napi);
Johannes Berg571ecf62007-07-27 15:43:22 +02004643
4644/* This is a version of the rx handler that can be called from hard irq
4645 * context. Post the skb on the queue and schedule the tasklet */
Johannes Bergf1d58c22009-06-17 13:13:00 +02004646void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb)
Johannes Berg571ecf62007-07-27 15:43:22 +02004647{
4648 struct ieee80211_local *local = hw_to_local(hw);
4649
4650 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb));
4651
Johannes Berg571ecf62007-07-27 15:43:22 +02004652 skb->pkt_type = IEEE80211_RX_MSG;
4653 skb_queue_tail(&local->skb_queue, skb);
4654 tasklet_schedule(&local->tasklet);
4655}
4656EXPORT_SYMBOL(ieee80211_rx_irqsafe);