Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 5 | * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
S.Çağlar Onur | ab46623 | 2008-02-14 17:36:47 +0200 | [diff] [blame] | 12 | #include <linux/jiffies.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 13 | #include <linux/slab.h> |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 14 | #include <linux/kernel.h> |
| 15 | #include <linux/skbuff.h> |
| 16 | #include <linux/netdevice.h> |
| 17 | #include <linux/etherdevice.h> |
Johannes Berg | d4e46a3 | 2007-09-14 11:10:24 -0400 | [diff] [blame] | 18 | #include <linux/rcupdate.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 19 | #include <linux/export.h> |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 20 | #include <net/mac80211.h> |
| 21 | #include <net/ieee80211_radiotap.h> |
Johannes Berg | d26ad37 | 2012-02-20 11:38:41 +0100 | [diff] [blame] | 22 | #include <asm/unaligned.h> |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 23 | |
| 24 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 25 | #include "driver-ops.h" |
Johannes Berg | 2c8dccc | 2008-04-08 15:14:40 -0400 | [diff] [blame] | 26 | #include "led.h" |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 27 | #include "mesh.h" |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 28 | #include "wep.h" |
| 29 | #include "wpa.h" |
| 30 | #include "tkip.h" |
| 31 | #include "wme.h" |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 32 | #include "rate.h" |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 33 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 34 | /* |
| 35 | * monitor mode reception |
| 36 | * |
| 37 | * This function cleans up the SKB, i.e. it removes all the stuff |
| 38 | * only useful for monitoring. |
| 39 | */ |
| 40 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 41 | struct sk_buff *skb) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 42 | { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 43 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
| 44 | if (likely(skb->len > FCS_LEN)) |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 45 | __pskb_trim(skb, skb->len - FCS_LEN); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 46 | else { |
| 47 | /* driver bug */ |
| 48 | WARN_ON(1); |
| 49 | dev_kfree_skb(skb); |
Dan Carpenter | 0624760 | 2012-11-27 20:31:19 +0300 | [diff] [blame] | 50 | return NULL; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 51 | } |
| 52 | } |
| 53 | |
| 54 | return skb; |
| 55 | } |
| 56 | |
Zhao, Gang | 6b59db7 | 2014-04-21 12:52:59 +0800 | [diff] [blame] | 57 | static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 58 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 59 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Zhao, Gang | 6b59db7 | 2014-04-21 12:52:59 +0800 | [diff] [blame] | 60 | struct ieee80211_hdr *hdr = (void *)skb->data; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 61 | |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 62 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
| 63 | RX_FLAG_FAILED_PLCP_CRC | |
| 64 | RX_FLAG_AMPDU_IS_ZEROLEN)) |
Zhao, Gang | 6b59db7 | 2014-04-21 12:52:59 +0800 | [diff] [blame] | 65 | return true; |
| 66 | |
Emmanuel Grumbach | 0059b2b | 2014-02-05 16:36:01 +0200 | [diff] [blame] | 67 | if (unlikely(skb->len < 16 + present_fcs_len)) |
Zhao, Gang | 6b59db7 | 2014-04-21 12:52:59 +0800 | [diff] [blame] | 68 | return true; |
| 69 | |
Harvey Harrison | 87228f5 | 2008-06-11 14:21:59 -0700 | [diff] [blame] | 70 | if (ieee80211_is_ctl(hdr->frame_control) && |
| 71 | !ieee80211_is_pspoll(hdr->frame_control) && |
| 72 | !ieee80211_is_back_req(hdr->frame_control)) |
Zhao, Gang | 6b59db7 | 2014-04-21 12:52:59 +0800 | [diff] [blame] | 73 | return true; |
| 74 | |
| 75 | return false; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 76 | } |
| 77 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 78 | static int |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 79 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
| 80 | struct ieee80211_rx_status *status) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 81 | { |
| 82 | int len; |
| 83 | |
| 84 | /* always present fields */ |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 85 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 86 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 87 | /* allocate extra bitmaps */ |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 88 | if (status->chains) |
| 89 | len += 4 * hweight8(status->chains); |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 90 | |
| 91 | if (ieee80211_have_rx_timestamp(status)) { |
| 92 | len = ALIGN(len, 8); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 93 | len += 8; |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 94 | } |
Johannes Berg | 7fee537 | 2009-01-30 11:13:06 +0100 | [diff] [blame] | 95 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 96 | len += 1; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 97 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 98 | /* antenna field, if we don't have per-chain info */ |
| 99 | if (!status->chains) |
| 100 | len += 1; |
| 101 | |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 102 | /* padding for RX_FLAGS if necessary */ |
| 103 | len = ALIGN(len, 2); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 104 | |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 105 | if (status->flag & RX_FLAG_HT) /* HT info */ |
| 106 | len += 3; |
| 107 | |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 108 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 109 | len = ALIGN(len, 4); |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 110 | len += 8; |
| 111 | } |
| 112 | |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 113 | if (status->flag & RX_FLAG_VHT) { |
| 114 | len = ALIGN(len, 2); |
| 115 | len += 12; |
| 116 | } |
| 117 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 118 | if (status->chains) { |
| 119 | /* antenna and antenna signal fields */ |
| 120 | len += 2 * hweight8(status->chains); |
| 121 | } |
| 122 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 123 | return len; |
| 124 | } |
| 125 | |
Johannes Berg | 00ea6de | 2012-09-05 15:54:51 +0200 | [diff] [blame] | 126 | /* |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 127 | * ieee80211_add_rx_radiotap_header - add radiotap header |
| 128 | * |
| 129 | * add a radiotap header containing all the fields which the hardware provided. |
| 130 | */ |
| 131 | static void |
| 132 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, |
| 133 | struct sk_buff *skb, |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 134 | struct ieee80211_rate *rate, |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 135 | int rtap_len, bool has_fcs) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 136 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 137 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 138 | struct ieee80211_radiotap_header *rthdr; |
| 139 | unsigned char *pos; |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 140 | __le32 *it_present; |
| 141 | u32 it_present_val; |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 142 | u16 rx_flags = 0; |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 143 | u16 channel_flags = 0; |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 144 | int mpdulen, chain; |
| 145 | unsigned long chains = status->chains; |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 146 | |
| 147 | mpdulen = skb->len; |
| 148 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) |
| 149 | mpdulen += FCS_LEN; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 150 | |
| 151 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); |
| 152 | memset(rthdr, 0, rtap_len); |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 153 | it_present = &rthdr->it_present; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 154 | |
| 155 | /* radiotap header, set always present flags */ |
Emmanuel Grumbach | 0059b2b | 2014-02-05 16:36:01 +0200 | [diff] [blame] | 156 | rthdr->it_len = cpu_to_le16(rtap_len); |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 157 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
| 158 | BIT(IEEE80211_RADIOTAP_CHANNEL) | |
| 159 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 160 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 161 | if (!status->chains) |
| 162 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); |
| 163 | |
| 164 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
| 165 | it_present_val |= |
| 166 | BIT(IEEE80211_RADIOTAP_EXT) | |
| 167 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); |
| 168 | put_unaligned_le32(it_present_val, it_present); |
| 169 | it_present++; |
| 170 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | |
| 171 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); |
| 172 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 173 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 174 | put_unaligned_le32(it_present_val, it_present); |
| 175 | |
| 176 | pos = (void *)(it_present + 1); |
| 177 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 178 | /* the order of the following fields is important */ |
| 179 | |
| 180 | /* IEEE80211_RADIOTAP_TSFT */ |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 181 | if (ieee80211_have_rx_timestamp(status)) { |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 182 | /* padding */ |
| 183 | while ((pos - (u8 *)rthdr) & 7) |
| 184 | *pos++ = 0; |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 185 | put_unaligned_le64( |
| 186 | ieee80211_calculate_rx_timestamp(local, status, |
| 187 | mpdulen, 0), |
| 188 | pos); |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 189 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 190 | pos += 8; |
| 191 | } |
| 192 | |
| 193 | /* IEEE80211_RADIOTAP_FLAGS */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 194 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 195 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
Johannes Berg | aae8983 | 2009-03-13 12:52:10 +0100 | [diff] [blame] | 196 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
| 197 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; |
Bruno Randolf | b4f28bb | 2008-07-30 17:19:55 +0200 | [diff] [blame] | 198 | if (status->flag & RX_FLAG_SHORTPRE) |
| 199 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 200 | pos++; |
| 201 | |
| 202 | /* IEEE80211_RADIOTAP_RATE */ |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 203 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 204 | /* |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 205 | * Without rate information don't add it. If we have, |
Mohammed Shafi Shajakhan | 38f37be | 2011-02-07 10:10:04 +0530 | [diff] [blame] | 206 | * MCS information is a separate field in radiotap, |
Johannes Berg | 73b4809 | 2011-04-18 17:05:21 +0200 | [diff] [blame] | 207 | * added below. The byte here is needed as padding |
| 208 | * for the channel though, so initialise it to 0. |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 209 | */ |
| 210 | *pos = 0; |
Jouni Malinen | 8d6f658 | 2008-12-15 10:37:50 +0200 | [diff] [blame] | 211 | } else { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 212 | int shift = 0; |
Jouni Malinen | ebe6c7b | 2009-01-10 11:47:33 +0200 | [diff] [blame] | 213 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 214 | if (status->flag & RX_FLAG_10MHZ) |
| 215 | shift = 1; |
| 216 | else if (status->flag & RX_FLAG_5MHZ) |
| 217 | shift = 2; |
| 218 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); |
Jouni Malinen | 8d6f658 | 2008-12-15 10:37:50 +0200 | [diff] [blame] | 219 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 220 | pos++; |
| 221 | |
| 222 | /* IEEE80211_RADIOTAP_CHANNEL */ |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 223 | put_unaligned_le16(status->freq, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 224 | pos += 2; |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 225 | if (status->flag & RX_FLAG_10MHZ) |
| 226 | channel_flags |= IEEE80211_CHAN_HALF; |
| 227 | else if (status->flag & RX_FLAG_5MHZ) |
| 228 | channel_flags |= IEEE80211_CHAN_QUARTER; |
| 229 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 230 | if (status->band == IEEE80211_BAND_5GHZ) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 231 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 232 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 233 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 234 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 235 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 236 | else if (rate) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 237 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 238 | else |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 239 | channel_flags |= IEEE80211_CHAN_2GHZ; |
| 240 | put_unaligned_le16(channel_flags, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 241 | pos += 2; |
| 242 | |
| 243 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ |
Felix Fietkau | fe8431f | 2012-03-01 18:00:07 +0100 | [diff] [blame] | 244 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
| 245 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 246 | *pos = status->signal; |
| 247 | rthdr->it_present |= |
| 248 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); |
| 249 | pos++; |
| 250 | } |
| 251 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 252 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
| 253 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 254 | if (!status->chains) { |
| 255 | /* IEEE80211_RADIOTAP_ANTENNA */ |
| 256 | *pos = status->antenna; |
| 257 | pos++; |
| 258 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 259 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 260 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
| 261 | |
| 262 | /* IEEE80211_RADIOTAP_RX_FLAGS */ |
| 263 | /* ensure 2 byte alignment for the 2 byte field as required */ |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 264 | if ((pos - (u8 *)rthdr) & 1) |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 265 | *pos++ = 0; |
Johannes Berg | aae8983 | 2009-03-13 12:52:10 +0100 | [diff] [blame] | 266 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 267 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
| 268 | put_unaligned_le16(rx_flags, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 269 | pos += 2; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 270 | |
| 271 | if (status->flag & RX_FLAG_HT) { |
Oleksij Rempel | 786677d | 2013-05-24 12:05:45 +0200 | [diff] [blame] | 272 | unsigned int stbc; |
| 273 | |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 274 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
Johannes Berg | ac55d2f | 2012-05-10 09:09:10 +0200 | [diff] [blame] | 275 | *pos++ = local->hw.radiotap_mcs_details; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 276 | *pos = 0; |
| 277 | if (status->flag & RX_FLAG_SHORT_GI) |
| 278 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; |
| 279 | if (status->flag & RX_FLAG_40MHZ) |
| 280 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; |
Johannes Berg | ac55d2f | 2012-05-10 09:09:10 +0200 | [diff] [blame] | 281 | if (status->flag & RX_FLAG_HT_GF) |
| 282 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; |
Emmanuel Grumbach | 63c361f | 2014-02-05 12:48:53 +0200 | [diff] [blame] | 283 | if (status->flag & RX_FLAG_LDPC) |
| 284 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; |
Oleksij Rempel | 786677d | 2013-05-24 12:05:45 +0200 | [diff] [blame] | 285 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
| 286 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 287 | pos++; |
| 288 | *pos++ = status->rate_idx; |
| 289 | } |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 290 | |
| 291 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
| 292 | u16 flags = 0; |
| 293 | |
| 294 | /* ensure 4 byte alignment */ |
| 295 | while ((pos - (u8 *)rthdr) & 3) |
| 296 | pos++; |
| 297 | rthdr->it_present |= |
| 298 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); |
| 299 | put_unaligned_le32(status->ampdu_reference, pos); |
| 300 | pos += 4; |
| 301 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) |
| 302 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; |
| 303 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) |
| 304 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; |
| 305 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) |
| 306 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; |
| 307 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) |
| 308 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; |
| 309 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) |
| 310 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; |
| 311 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) |
| 312 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; |
| 313 | put_unaligned_le16(flags, pos); |
| 314 | pos += 2; |
| 315 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) |
| 316 | *pos++ = status->ampdu_delimiter_crc; |
| 317 | else |
| 318 | *pos++ = 0; |
| 319 | *pos++ = 0; |
| 320 | } |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 321 | |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 322 | if (status->flag & RX_FLAG_VHT) { |
| 323 | u16 known = local->hw.radiotap_vht_details; |
| 324 | |
| 325 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); |
| 326 | /* known field - how to handle 80+80? */ |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 327 | if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 328 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
| 329 | put_unaligned_le16(known, pos); |
| 330 | pos += 2; |
| 331 | /* flags */ |
| 332 | if (status->flag & RX_FLAG_SHORT_GI) |
| 333 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; |
Emmanuel Grumbach | 63c361f | 2014-02-05 12:48:53 +0200 | [diff] [blame] | 334 | /* in VHT, STBC is binary */ |
| 335 | if (status->flag & RX_FLAG_STBC_MASK) |
| 336 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; |
Emmanuel Grumbach | fb378c2 | 2014-03-04 10:35:25 +0200 | [diff] [blame] | 337 | if (status->vht_flag & RX_VHT_FLAG_BF) |
| 338 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 339 | pos++; |
| 340 | /* bandwidth */ |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 341 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 342 | *pos++ = 4; |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 343 | else if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 344 | *pos++ = 0; /* marked not known above */ |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 345 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 346 | *pos++ = 11; |
| 347 | else if (status->flag & RX_FLAG_40MHZ) |
| 348 | *pos++ = 1; |
| 349 | else /* 20 MHz */ |
| 350 | *pos++ = 0; |
| 351 | /* MCS/NSS */ |
| 352 | *pos = (status->rate_idx << 4) | status->vht_nss; |
| 353 | pos += 4; |
| 354 | /* coding field */ |
Emmanuel Grumbach | 63c361f | 2014-02-05 12:48:53 +0200 | [diff] [blame] | 355 | if (status->flag & RX_FLAG_LDPC) |
| 356 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 357 | pos++; |
| 358 | /* group ID */ |
| 359 | pos++; |
| 360 | /* partial_aid */ |
| 361 | pos += 2; |
| 362 | } |
| 363 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 364 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
| 365 | *pos++ = status->chain_signal[chain]; |
| 366 | *pos++ = chain; |
| 367 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 368 | } |
| 369 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 370 | /* |
| 371 | * This function copies a received frame to all monitor interfaces and |
| 372 | * returns a cleaned-up SKB that no longer includes the FCS nor the |
| 373 | * radiotap header the driver might have added. |
| 374 | */ |
| 375 | static struct sk_buff * |
| 376 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 377 | struct ieee80211_rate *rate) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 378 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 379 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 380 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 381 | int needed_headroom; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 382 | struct sk_buff *skb, *skb2; |
| 383 | struct net_device *prev_dev = NULL; |
| 384 | int present_fcs_len = 0; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 385 | |
| 386 | /* |
| 387 | * First, we may need to make a copy of the skb because |
| 388 | * (1) we need to modify it for radiotap (if not present), and |
| 389 | * (2) the other RX handlers will modify the skb we got. |
| 390 | * |
| 391 | * We don't need to, of course, if we aren't going to return |
| 392 | * the SKB because it has a bad FCS/PLCP checksum. |
| 393 | */ |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 394 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 395 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
| 396 | present_fcs_len = FCS_LEN; |
| 397 | |
Emmanuel Grumbach | 0059b2b | 2014-02-05 16:36:01 +0200 | [diff] [blame] | 398 | /* ensure hdr->frame_control is in skb head */ |
| 399 | if (!pskb_may_pull(origskb, 2)) { |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 400 | dev_kfree_skb(origskb); |
| 401 | return NULL; |
| 402 | } |
| 403 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 404 | if (!local->monitors) { |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 405 | if (should_drop_frame(origskb, present_fcs_len)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 406 | dev_kfree_skb(origskb); |
| 407 | return NULL; |
| 408 | } |
| 409 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 410 | return remove_monitor_info(local, origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 411 | } |
| 412 | |
Helmut Schaa | 751413e | 2012-12-05 14:36:12 +0100 | [diff] [blame] | 413 | /* room for the radiotap header based on driver features */ |
| 414 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
| 415 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 416 | if (should_drop_frame(origskb, present_fcs_len)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 417 | /* only need to expand headroom if necessary */ |
| 418 | skb = origskb; |
| 419 | origskb = NULL; |
| 420 | |
| 421 | /* |
| 422 | * This shouldn't trigger often because most devices have an |
| 423 | * RX header they pull before we get here, and that should |
| 424 | * be big enough for our radiotap information. We should |
| 425 | * probably export the length to drivers so that we can have |
| 426 | * them allocate enough headroom to start with. |
| 427 | */ |
| 428 | if (skb_headroom(skb) < needed_headroom && |
Johannes Berg | c49e5ea | 2007-12-11 21:33:42 +0100 | [diff] [blame] | 429 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 430 | dev_kfree_skb(skb); |
| 431 | return NULL; |
| 432 | } |
| 433 | } else { |
| 434 | /* |
| 435 | * Need to make a copy and possibly remove radiotap header |
| 436 | * and FCS from the original. |
| 437 | */ |
| 438 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); |
| 439 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 440 | origskb = remove_monitor_info(local, origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 441 | |
| 442 | if (!skb) |
| 443 | return origskb; |
| 444 | } |
| 445 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 446 | /* prepend radiotap information */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 447 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
| 448 | true); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 449 | |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 450 | skb_reset_mac_header(skb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 451 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 452 | skb->pkt_type = PACKET_OTHERHOST; |
| 453 | skb->protocol = htons(ETH_P_802_2); |
| 454 | |
| 455 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 456 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 457 | continue; |
| 458 | |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 459 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
| 460 | continue; |
| 461 | |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 462 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 463 | continue; |
| 464 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 465 | if (prev_dev) { |
| 466 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 467 | if (skb2) { |
| 468 | skb2->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 469 | netif_receive_skb(skb2); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 470 | } |
| 471 | } |
| 472 | |
| 473 | prev_dev = sdata->dev; |
| 474 | sdata->dev->stats.rx_packets++; |
| 475 | sdata->dev->stats.rx_bytes += skb->len; |
| 476 | } |
| 477 | |
| 478 | if (prev_dev) { |
| 479 | skb->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 480 | netif_receive_skb(skb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 481 | } else |
| 482 | dev_kfree_skb(skb); |
| 483 | |
| 484 | return origskb; |
| 485 | } |
| 486 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 487 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 488 | { |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 489 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 490 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 491 | int tid, seqno_idx, security_idx; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 492 | |
| 493 | /* does the frame have a qos control field? */ |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 494 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
| 495 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 496 | /* frame has qos control */ |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 497 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
Johannes Berg | 04b7dcf | 2011-06-22 10:06:59 +0200 | [diff] [blame] | 498 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 499 | status->rx_flags |= IEEE80211_RX_AMSDU; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 500 | |
| 501 | seqno_idx = tid; |
| 502 | security_idx = tid; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 503 | } else { |
Johannes Berg | 1411f9b | 2008-07-10 10:11:02 +0200 | [diff] [blame] | 504 | /* |
| 505 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): |
| 506 | * |
| 507 | * Sequence numbers for management frames, QoS data |
| 508 | * frames with a broadcast/multicast address in the |
| 509 | * Address 1 field, and all non-QoS data frames sent |
| 510 | * by QoS STAs are assigned using an additional single |
| 511 | * modulo-4096 counter, [...] |
| 512 | * |
| 513 | * We also use that counter for non-QoS STAs. |
| 514 | */ |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 515 | seqno_idx = IEEE80211_NUM_TIDS; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 516 | security_idx = 0; |
| 517 | if (ieee80211_is_mgmt(hdr->frame_control)) |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 518 | security_idx = IEEE80211_NUM_TIDS; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 519 | tid = 0; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 520 | } |
Johannes Berg | 52865dfd | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 521 | |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 522 | rx->seqno_idx = seqno_idx; |
| 523 | rx->security_idx = security_idx; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 524 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
| 525 | * For now, set skb->priority to 0 for other cases. */ |
| 526 | rx->skb->priority = (tid > 7) ? 0 : tid; |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 527 | } |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 528 | |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 529 | /** |
| 530 | * DOC: Packet alignment |
| 531 | * |
| 532 | * Drivers always need to pass packets that are aligned to two-byte boundaries |
| 533 | * to the stack. |
| 534 | * |
| 535 | * Additionally, should, if possible, align the payload data in a way that |
| 536 | * guarantees that the contained IP header is aligned to a four-byte |
| 537 | * boundary. In the case of regular frames, this simply means aligning the |
| 538 | * payload to a four-byte boundary (because either the IP header is directly |
| 539 | * contained, or IV/RFC1042 headers that have a length divisible by four are |
Kalle Valo | 59d9cb0 | 2009-12-17 13:54:57 +0100 | [diff] [blame] | 540 | * in front of it). If the payload data is not properly aligned and the |
| 541 | * architecture doesn't support efficient unaligned operations, mac80211 |
| 542 | * will align the data. |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 543 | * |
| 544 | * With A-MSDU frames, however, the payload data address must yield two modulo |
| 545 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that |
| 546 | * push the IP header further back to a multiple of four again. Thankfully, the |
| 547 | * specs were sane enough this time around to require padding each A-MSDU |
| 548 | * subframe to a length that is a multiple of four. |
| 549 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 550 | * Padding like Atheros hardware adds which is between the 802.11 header and |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 551 | * the payload is not supported, the driver is required to move the 802.11 |
| 552 | * header to be directly in front of the payload in that case. |
| 553 | */ |
| 554 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 555 | { |
Kalle Valo | 59d9cb0 | 2009-12-17 13:54:57 +0100 | [diff] [blame] | 556 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 557 | WARN_ONCE((unsigned long)rx->skb->data & 1, |
| 558 | "unaligned packet at 0x%p\n", rx->skb->data); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 559 | #endif |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 560 | } |
| 561 | |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 562 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 563 | /* rx handlers */ |
| 564 | |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 565 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
| 566 | { |
| 567 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 568 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 569 | if (is_multicast_ether_addr(hdr->addr1)) |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 570 | return 0; |
| 571 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 572 | return ieee80211_is_robust_mgmt_frame(skb); |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | |
| 576 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) |
| 577 | { |
| 578 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 579 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 580 | if (!is_multicast_ether_addr(hdr->addr1)) |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 581 | return 0; |
| 582 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 583 | return ieee80211_is_robust_mgmt_frame(skb); |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | |
| 587 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ |
| 588 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) |
| 589 | { |
| 590 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; |
| 591 | struct ieee80211_mmie *mmie; |
| 592 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 593 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 594 | return -1; |
| 595 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 596 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 597 | return -1; /* not a robust management frame */ |
| 598 | |
| 599 | mmie = (struct ieee80211_mmie *) |
| 600 | (skb->data + skb->len - sizeof(*mmie)); |
| 601 | if (mmie->element_id != WLAN_EID_MMIE || |
| 602 | mmie->length != sizeof(*mmie) - 2) |
| 603 | return -1; |
| 604 | |
| 605 | return le16_to_cpu(mmie->key_id); |
| 606 | } |
| 607 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 608 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
| 609 | struct sk_buff *skb) |
| 610 | { |
| 611 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 612 | __le16 fc; |
| 613 | int hdrlen; |
| 614 | u8 keyid; |
| 615 | |
| 616 | fc = hdr->frame_control; |
| 617 | hdrlen = ieee80211_hdrlen(fc); |
| 618 | |
| 619 | if (skb->len < hdrlen + cs->hdr_len) |
| 620 | return -EINVAL; |
| 621 | |
| 622 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); |
| 623 | keyid &= cs->key_idx_mask; |
| 624 | keyid >>= cs->key_idx_shift; |
| 625 | |
| 626 | return keyid; |
| 627 | } |
| 628 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 629 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 630 | { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 631 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 632 | char *dev_addr = rx->sdata->vif.addr; |
Johannes Berg | d6d1a5a | 2008-02-25 16:24:38 +0100 | [diff] [blame] | 633 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 634 | if (ieee80211_is_data(hdr->frame_control)) { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 635 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 636 | if (ieee80211_has_tods(hdr->frame_control) || |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 637 | !ieee80211_has_fromds(hdr->frame_control)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 638 | return RX_DROP_MONITOR; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 639 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 640 | return RX_DROP_MONITOR; |
| 641 | } else { |
| 642 | if (!ieee80211_has_a4(hdr->frame_control)) |
| 643 | return RX_DROP_MONITOR; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 644 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 645 | return RX_DROP_MONITOR; |
| 646 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | /* If there is not an established peer link and this is not a peer link |
| 650 | * establisment frame, beacon or probe, drop the frame. |
| 651 | */ |
| 652 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 653 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 654 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | d6d1a5a | 2008-02-25 16:24:38 +0100 | [diff] [blame] | 655 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 656 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 657 | return RX_DROP_MONITOR; |
| 658 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 659 | if (ieee80211_is_action(hdr->frame_control)) { |
Javier Cardona | d3aaec8a | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 660 | u8 category; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 661 | |
| 662 | /* make sure category field is present */ |
| 663 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) |
| 664 | return RX_DROP_MONITOR; |
| 665 | |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 666 | mgmt = (struct ieee80211_mgmt *)hdr; |
Javier Cardona | d3aaec8a | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 667 | category = mgmt->u.action.category; |
| 668 | if (category != WLAN_CATEGORY_MESH_ACTION && |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 669 | category != WLAN_CATEGORY_SELF_PROTECTED) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 670 | return RX_DROP_MONITOR; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 671 | return RX_CONTINUE; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 672 | } |
| 673 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 674 | if (ieee80211_is_probe_req(hdr->frame_control) || |
| 675 | ieee80211_is_probe_resp(hdr->frame_control) || |
Javier Cardona | 7183912 | 2011-04-07 15:08:31 -0700 | [diff] [blame] | 676 | ieee80211_is_beacon(hdr->frame_control) || |
| 677 | ieee80211_is_auth(hdr->frame_control)) |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 678 | return RX_CONTINUE; |
| 679 | |
| 680 | return RX_DROP_MONITOR; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 681 | } |
| 682 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 683 | return RX_CONTINUE; |
| 684 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 685 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 686 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 687 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 688 | int index, |
| 689 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 690 | { |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 691 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
| 692 | struct sk_buff *skb; |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 693 | struct ieee80211_rx_status *status; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 694 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 695 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 696 | |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 697 | if (skb_queue_empty(skb_list)) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 698 | goto no_frame; |
| 699 | |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 700 | if (!ieee80211_rx_reorder_ready(skb_list)) { |
| 701 | __skb_queue_purge(skb_list); |
| 702 | goto no_frame; |
| 703 | } |
| 704 | |
| 705 | /* release frames from the reorder ring buffer */ |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 706 | tid_agg_rx->stored_mpdu_num--; |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 707 | while ((skb = __skb_dequeue(skb_list))) { |
| 708 | status = IEEE80211_SKB_RXCB(skb); |
| 709 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; |
| 710 | __skb_queue_tail(frames, skb); |
| 711 | } |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 712 | |
| 713 | no_frame: |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 714 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 715 | } |
| 716 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 717 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 718 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 719 | u16 head_seq_num, |
| 720 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 721 | { |
| 722 | int index; |
| 723 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 724 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 725 | |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 726 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 727 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 728 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
| 729 | frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 730 | } |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If |
| 735 | * the skb was added to the buffer longer than this time ago, the earlier |
| 736 | * frames that have not yet been received are assumed to be lost and the skb |
| 737 | * can be released for processing. This may also release other skb's from the |
| 738 | * reorder buffer if there are no additional gaps between the frames. |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 739 | * |
| 740 | * Callers must hold tid_agg_rx->reorder_lock. |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 741 | */ |
| 742 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) |
| 743 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 744 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 745 | struct tid_ampdu_rx *tid_agg_rx, |
| 746 | struct sk_buff_head *frames) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 747 | { |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 748 | int index, i, j; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 749 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 750 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 751 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 752 | /* release the buffer until next missing frame */ |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 753 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 754 | if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && |
Eliad Peller | 07ae2df | 2012-02-01 18:48:09 +0200 | [diff] [blame] | 755 | tid_agg_rx->stored_mpdu_num) { |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 756 | /* |
| 757 | * No buffers ready to be released, but check whether any |
| 758 | * frames in the reorder buffer have timed out. |
| 759 | */ |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 760 | int skipped = 1; |
| 761 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; |
| 762 | j = (j + 1) % tid_agg_rx->buf_size) { |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 763 | if (!ieee80211_rx_reorder_ready( |
| 764 | &tid_agg_rx->reorder_buf[j])) { |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 765 | skipped++; |
| 766 | continue; |
| 767 | } |
Daniel Halperin | 499fe9a | 2011-03-24 16:01:48 -0700 | [diff] [blame] | 768 | if (skipped && |
| 769 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 770 | HT_RX_REORDER_BUF_TIMEOUT)) |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 771 | goto set_release_timer; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 772 | |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 773 | /* don't leave incomplete A-MSDUs around */ |
| 774 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; |
| 775 | i = (i + 1) % tid_agg_rx->buf_size) |
| 776 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); |
| 777 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 778 | ht_dbg_ratelimited(sdata, |
| 779 | "release an RX reorder frame due to timeout on earlier frames\n"); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 780 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
| 781 | frames); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 782 | |
| 783 | /* |
| 784 | * Increment the head seq# also for the skipped slots. |
| 785 | */ |
| 786 | tid_agg_rx->head_seq_num = |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 787 | (tid_agg_rx->head_seq_num + |
| 788 | skipped) & IEEE80211_SN_MASK; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 789 | skipped = 0; |
| 790 | } |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 791 | } else while (ieee80211_rx_reorder_ready( |
| 792 | &tid_agg_rx->reorder_buf[index])) { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 793 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
| 794 | frames); |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 795 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 796 | } |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 797 | |
| 798 | if (tid_agg_rx->stored_mpdu_num) { |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 799 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 800 | |
| 801 | for (; j != (index - 1) % tid_agg_rx->buf_size; |
| 802 | j = (j + 1) % tid_agg_rx->buf_size) { |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 803 | if (ieee80211_rx_reorder_ready( |
| 804 | &tid_agg_rx->reorder_buf[j])) |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 805 | break; |
| 806 | } |
| 807 | |
| 808 | set_release_timer: |
| 809 | |
| 810 | mod_timer(&tid_agg_rx->reorder_timer, |
Christian Lamparter | 334df73 | 2011-04-24 20:41:16 +0200 | [diff] [blame] | 811 | tid_agg_rx->reorder_time[j] + 1 + |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 812 | HT_RX_REORDER_BUF_TIMEOUT); |
| 813 | } else { |
| 814 | del_timer(&tid_agg_rx->reorder_timer); |
| 815 | } |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 816 | } |
| 817 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 818 | /* |
| 819 | * As this function belongs to the RX path it must be under |
| 820 | * rcu_read_lock protection. It returns false if the frame |
| 821 | * can be processed immediately, true if it was consumed. |
| 822 | */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 823 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 824 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 825 | struct sk_buff *skb, |
| 826 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 827 | { |
| 828 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 829 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 830 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
| 831 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; |
| 832 | u16 head_seq_num, buf_size; |
| 833 | int index; |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 834 | bool ret = true; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 835 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 836 | spin_lock(&tid_agg_rx->reorder_lock); |
| 837 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 838 | buf_size = tid_agg_rx->buf_size; |
| 839 | head_seq_num = tid_agg_rx->head_seq_num; |
| 840 | |
| 841 | /* frame with out of date sequence number */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 842 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 843 | dev_kfree_skb(skb); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 844 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | /* |
| 848 | * If frame the sequence number exceeds our buffering window |
| 849 | * size release some previous frames to make room for this one. |
| 850 | */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 851 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
| 852 | head_seq_num = ieee80211_sn_inc( |
| 853 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 854 | /* release stored frames up to new head to stack */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 855 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 856 | head_seq_num, frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 857 | } |
| 858 | |
| 859 | /* Now the new frame is always in the range of the reordering buffer */ |
| 860 | |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 861 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 862 | |
| 863 | /* check if we already stored this frame */ |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 864 | if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 865 | dev_kfree_skb(skb); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 866 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 867 | } |
| 868 | |
| 869 | /* |
| 870 | * If the current MPDU is in the right order and nothing else |
| 871 | * is stored we can process it directly, no need to buffer it. |
Johannes Berg | c835b21 | 2011-03-15 23:17:01 +0100 | [diff] [blame] | 872 | * If it is first but there's something stored, we may be able |
| 873 | * to release frames after this one. |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 874 | */ |
| 875 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && |
| 876 | tid_agg_rx->stored_mpdu_num == 0) { |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 877 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
| 878 | tid_agg_rx->head_seq_num = |
| 879 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 880 | ret = false; |
| 881 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 882 | } |
| 883 | |
| 884 | /* put the frame in the reordering buffer */ |
Michal Kazior | 83eb935 | 2014-07-16 12:09:31 +0200 | [diff] [blame] | 885 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
| 886 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
| 887 | tid_agg_rx->reorder_time[index] = jiffies; |
| 888 | tid_agg_rx->stored_mpdu_num++; |
| 889 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
| 890 | } |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 891 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 892 | out: |
| 893 | spin_unlock(&tid_agg_rx->reorder_lock); |
| 894 | return ret; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 895 | } |
| 896 | |
| 897 | /* |
| 898 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns |
| 899 | * true if the MPDU was buffered, false if it should be processed. |
| 900 | */ |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 901 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
| 902 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 903 | { |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 904 | struct sk_buff *skb = rx->skb; |
| 905 | struct ieee80211_local *local = rx->local; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 906 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
Thomas Pedersen | 660c6a4 | 2011-11-03 21:11:12 -0700 | [diff] [blame] | 907 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 908 | struct sta_info *sta = rx->sta; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 909 | struct tid_ampdu_rx *tid_agg_rx; |
| 910 | u16 sc; |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 911 | u8 tid, ack_policy; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 912 | |
Johannes Berg | 051a41f | 2013-11-20 11:28:27 +0100 | [diff] [blame] | 913 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
| 914 | is_multicast_ether_addr(hdr->addr1)) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 915 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 916 | |
| 917 | /* |
| 918 | * filter the QoS data rx stream according to |
| 919 | * STA/TID and check if this STA/TID is on aggregation |
| 920 | */ |
| 921 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 922 | if (!sta) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 923 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 924 | |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 925 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
| 926 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 927 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
| 928 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 929 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
| 930 | if (!tid_agg_rx) |
| 931 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 932 | |
| 933 | /* qos null data frames are excluded */ |
| 934 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 935 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 936 | |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 937 | /* not part of a BA session */ |
| 938 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && |
| 939 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) |
| 940 | goto dont_reorder; |
| 941 | |
Thomas Pedersen | 660c6a4 | 2011-11-03 21:11:12 -0700 | [diff] [blame] | 942 | /* not actually part of this BA session */ |
| 943 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 944 | goto dont_reorder; |
| 945 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 946 | /* new, potentially un-ordered, ampdu frame - process it */ |
| 947 | |
| 948 | /* reset session timer */ |
| 949 | if (tid_agg_rx->timeout) |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 950 | tid_agg_rx->last_rx = jiffies; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 951 | |
| 952 | /* if this mpdu is fragmented - terminate rx aggregation session */ |
| 953 | sc = le16_to_cpu(hdr->seq_ctrl); |
| 954 | if (sc & IEEE80211_SCTL_FRAG) { |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 955 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
Johannes Berg | 344eec6 | 2010-06-10 10:21:36 +0200 | [diff] [blame] | 956 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
| 957 | ieee80211_queue_work(&local->hw, &rx->sdata->work); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 958 | return; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 959 | } |
| 960 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 961 | /* |
| 962 | * No locking needed -- we will only ever process one |
| 963 | * RX packet at a time, and thus own tid_agg_rx. All |
| 964 | * other code manipulating it needs to (and does) make |
| 965 | * sure that we cannot get to it any more before doing |
| 966 | * anything with it. |
| 967 | */ |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 968 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
| 969 | frames)) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 970 | return; |
| 971 | |
| 972 | dont_reorder: |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 973 | __skb_queue_tail(frames, skb); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 974 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 975 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 976 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 977 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 978 | { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 979 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 980 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 981 | |
Johannes Berg | 6b0f327 | 2013-07-11 22:33:26 +0200 | [diff] [blame] | 982 | /* |
| 983 | * Drop duplicate 802.11 retransmissions |
| 984 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") |
| 985 | */ |
| 986 | if (rx->skb->len >= 24 && rx->sta && |
| 987 | !ieee80211_is_ctl(hdr->frame_control) && |
| 988 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
| 989 | !is_multicast_ether_addr(hdr->addr1)) { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 990 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 991 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 992 | hdr->seq_ctrl)) { |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 993 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 994 | rx->local->dot11FrameDuplicateCount++; |
| 995 | rx->sta->num_duplicates++; |
| 996 | } |
Felix Fietkau | b1f9331 | 2011-02-04 19:20:08 +0100 | [diff] [blame] | 997 | return RX_DROP_UNUSABLE; |
Michal Kazior | 0cfcefe | 2013-09-23 15:34:38 +0200 | [diff] [blame] | 998 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 999 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
Michal Kazior | 0cfcefe | 2013-09-23 15:34:38 +0200 | [diff] [blame] | 1000 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1001 | } |
| 1002 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1003 | if (unlikely(rx->skb->len < 16)) { |
| 1004 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1005 | return RX_DROP_MONITOR; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1006 | } |
| 1007 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1008 | /* Drop disallowed frame classes based on STA auth/assoc state; |
| 1009 | * IEEE 802.11, Chap 5.5. |
| 1010 | * |
Johannes Berg | ccd7b36 | 2008-09-11 00:01:56 +0200 | [diff] [blame] | 1011 | * mac80211 filters only based on association state, i.e. it drops |
| 1012 | * Class 3 frames from not associated stations. hostapd sends |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1013 | * deauth/disassoc frames when needed. In addition, hostapd is |
| 1014 | * responsible for filtering on both auth and assoc states. |
| 1015 | */ |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1016 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 1017 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1018 | return ieee80211_rx_mesh_check(rx); |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1019 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 1020 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
| 1021 | ieee80211_is_pspoll(hdr->frame_control)) && |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1022 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
Bill Jordan | 1be7fe8 | 2010-10-01 11:20:41 -0400 | [diff] [blame] | 1023 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1024 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 1025 | /* |
| 1026 | * accept port control frames from the AP even when it's not |
| 1027 | * yet marked ASSOC to prevent a race where we don't set the |
| 1028 | * assoc bit quickly enough before it sends the first frame |
| 1029 | */ |
| 1030 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1031 | ieee80211_is_data_present(hdr->frame_control)) { |
Johannes Berg | 6dbda2d | 2012-10-26 00:41:23 +0200 | [diff] [blame] | 1032 | unsigned int hdrlen; |
| 1033 | __be16 ethertype; |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1034 | |
Johannes Berg | 6dbda2d | 2012-10-26 00:41:23 +0200 | [diff] [blame] | 1035 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| 1036 | |
| 1037 | if (rx->skb->len < hdrlen + 8) |
| 1038 | return RX_DROP_MONITOR; |
| 1039 | |
| 1040 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); |
| 1041 | if (ethertype == rx->sdata->control_port_protocol) |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1042 | return RX_CONTINUE; |
| 1043 | } |
Johannes Berg | 21fc756 | 2011-11-04 11:18:13 +0100 | [diff] [blame] | 1044 | |
| 1045 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 1046 | cfg80211_rx_spurious_frame(rx->sdata->dev, |
| 1047 | hdr->addr2, |
| 1048 | GFP_ATOMIC)) |
| 1049 | return RX_DROP_UNUSABLE; |
| 1050 | |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1051 | return RX_DROP_MONITOR; |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1052 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1053 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1054 | return RX_CONTINUE; |
Johannes Berg | 570bd53 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1055 | } |
| 1056 | |
| 1057 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1058 | static ieee80211_rx_result debug_noinline |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 1059 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) |
| 1060 | { |
| 1061 | struct ieee80211_local *local; |
| 1062 | struct ieee80211_hdr *hdr; |
| 1063 | struct sk_buff *skb; |
| 1064 | |
| 1065 | local = rx->local; |
| 1066 | skb = rx->skb; |
| 1067 | hdr = (struct ieee80211_hdr *) skb->data; |
| 1068 | |
| 1069 | if (!local->pspolling) |
| 1070 | return RX_CONTINUE; |
| 1071 | |
| 1072 | if (!ieee80211_has_fromds(hdr->frame_control)) |
| 1073 | /* this is not from AP */ |
| 1074 | return RX_CONTINUE; |
| 1075 | |
| 1076 | if (!ieee80211_is_data(hdr->frame_control)) |
| 1077 | return RX_CONTINUE; |
| 1078 | |
| 1079 | if (!ieee80211_has_moredata(hdr->frame_control)) { |
| 1080 | /* AP has no more frames buffered for us */ |
| 1081 | local->pspolling = false; |
| 1082 | return RX_CONTINUE; |
| 1083 | } |
| 1084 | |
| 1085 | /* more data bit is set, let's request a new frame from the AP */ |
| 1086 | ieee80211_send_pspoll(local, rx->sdata); |
| 1087 | |
| 1088 | return RX_CONTINUE; |
| 1089 | } |
| 1090 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1091 | static void sta_ps_start(struct sta_info *sta) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1092 | { |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 1093 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Christian Lamparter | 4571d3b | 2008-11-30 00:48:41 +0100 | [diff] [blame] | 1094 | struct ieee80211_local *local = sdata->local; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1095 | struct ps_data *ps; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1096 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1097 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
| 1098 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 1099 | ps = &sdata->bss->ps; |
| 1100 | else |
| 1101 | return; |
| 1102 | |
| 1103 | atomic_inc(&ps->num_sta_ps); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1104 | set_sta_flag(sta, WLAN_STA_PS_STA); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1105 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
| 1106 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1107 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
| 1108 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1109 | } |
| 1110 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1111 | static void sta_ps_end(struct sta_info *sta) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1112 | { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1113 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
| 1114 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | 004c872 | 2008-02-20 11:21:35 +0100 | [diff] [blame] | 1115 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1116 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
Johannes Berg | e3685e0 | 2014-02-20 11:19:58 +0100 | [diff] [blame] | 1117 | /* |
| 1118 | * Clear the flag only if the other one is still set |
| 1119 | * so that the TX path won't start TX'ing new frames |
| 1120 | * directly ... In the case that the driver flag isn't |
| 1121 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. |
| 1122 | */ |
| 1123 | clear_sta_flag(sta, WLAN_STA_PS_STA); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1124 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
| 1125 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | af81858 | 2009-11-06 11:35:50 +0100 | [diff] [blame] | 1126 | return; |
| 1127 | } |
| 1128 | |
Johannes Berg | 5ac2e35 | 2014-05-27 16:32:27 +0200 | [diff] [blame] | 1129 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
| 1130 | clear_sta_flag(sta, WLAN_STA_PS_STA); |
Johannes Berg | af81858 | 2009-11-06 11:35:50 +0100 | [diff] [blame] | 1131 | ieee80211_sta_ps_deliver_wakeup(sta); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1132 | } |
| 1133 | |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1134 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
| 1135 | { |
| 1136 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); |
| 1137 | bool in_ps; |
| 1138 | |
| 1139 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); |
| 1140 | |
| 1141 | /* Don't let the same PS state be set twice */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1142 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1143 | if ((start && in_ps) || (!start && !in_ps)) |
| 1144 | return -EINVAL; |
| 1145 | |
| 1146 | if (start) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1147 | sta_ps_start(sta_inf); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1148 | else |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1149 | sta_ps_end(sta_inf); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1150 | |
| 1151 | return 0; |
| 1152 | } |
| 1153 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); |
| 1154 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1155 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1156 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) |
| 1157 | { |
| 1158 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1159 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; |
| 1160 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
| 1161 | int tid, ac; |
| 1162 | |
| 1163 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 1164 | return RX_CONTINUE; |
| 1165 | |
| 1166 | if (sdata->vif.type != NL80211_IFTYPE_AP && |
| 1167 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) |
| 1168 | return RX_CONTINUE; |
| 1169 | |
| 1170 | /* |
| 1171 | * The device handles station powersave, so don't do anything about |
| 1172 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from |
| 1173 | * it to mac80211 since they're handled.) |
| 1174 | */ |
| 1175 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) |
| 1176 | return RX_CONTINUE; |
| 1177 | |
| 1178 | /* |
| 1179 | * Don't do anything if the station isn't already asleep. In |
| 1180 | * the uAPSD case, the station will probably be marked asleep, |
| 1181 | * in the PS-Poll case the station must be confused ... |
| 1182 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1183 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1184 | return RX_CONTINUE; |
| 1185 | |
| 1186 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1187 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
| 1188 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
Johannes Berg | deeaee1 | 2011-09-29 16:04:35 +0200 | [diff] [blame] | 1189 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
| 1190 | else |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1191 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
Johannes Berg | deeaee1 | 2011-09-29 16:04:35 +0200 | [diff] [blame] | 1192 | } |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1193 | |
| 1194 | /* Free PS Poll skb here instead of returning RX_DROP that would |
| 1195 | * count as an dropped frame. */ |
| 1196 | dev_kfree_skb(rx->skb); |
| 1197 | |
| 1198 | return RX_QUEUED; |
| 1199 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && |
| 1200 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
| 1201 | ieee80211_has_pm(hdr->frame_control) && |
| 1202 | (ieee80211_is_data_qos(hdr->frame_control) || |
| 1203 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { |
| 1204 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
| 1205 | ac = ieee802_1d_to_ac[tid & 7]; |
| 1206 | |
| 1207 | /* |
| 1208 | * If this AC is not trigger-enabled do nothing. |
| 1209 | * |
| 1210 | * NB: This could/should check a separate bitmap of trigger- |
| 1211 | * enabled queues, but for now we only implement uAPSD w/o |
| 1212 | * TSPEC changes to the ACs, so they're always the same. |
| 1213 | */ |
| 1214 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) |
| 1215 | return RX_CONTINUE; |
| 1216 | |
| 1217 | /* if we are in a service period, do nothing */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1218 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1219 | return RX_CONTINUE; |
| 1220 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1221 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1222 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
| 1223 | else |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1224 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1225 | } |
| 1226 | |
| 1227 | return RX_CONTINUE; |
| 1228 | } |
| 1229 | |
| 1230 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1231 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1232 | { |
| 1233 | struct sta_info *sta = rx->sta; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1234 | struct sk_buff *skb = rx->skb; |
| 1235 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1236 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | ef0621e | 2013-04-22 16:29:31 +0200 | [diff] [blame] | 1237 | int i; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1238 | |
| 1239 | if (!sta) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1240 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1241 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1242 | /* |
| 1243 | * Update last_rx only for IBSS packets which are for the current |
Antonio Quartulli | e584da5e | 2012-11-25 23:13:42 +0100 | [diff] [blame] | 1244 | * BSSID and for station already AUTHORIZED to avoid keeping the |
| 1245 | * current IBSS network alive in cases where other STAs start |
| 1246 | * using different BSSID. This will also give the station another |
| 1247 | * chance to restart the authentication/authorization in case |
| 1248 | * something went wrong the first time. |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1249 | */ |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1250 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 1251 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1252 | NL80211_IFTYPE_ADHOC); |
Antonio Quartulli | e584da5e | 2012-11-25 23:13:42 +0100 | [diff] [blame] | 1253 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
| 1254 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1255 | sta->last_rx = jiffies; |
Henning Rogge | f4ebddf | 2014-05-01 10:03:46 +0200 | [diff] [blame] | 1256 | if (ieee80211_is_data(hdr->frame_control) && |
| 1257 | !is_multicast_ether_addr(hdr->addr1)) { |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1258 | sta->last_rx_rate_idx = status->rate_idx; |
| 1259 | sta->last_rx_rate_flag = status->flag; |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 1260 | sta->last_rx_rate_vht_flag = status->vht_flag; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 1261 | sta->last_rx_rate_vht_nss = status->vht_nss; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1262 | } |
| 1263 | } |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1264 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
| 1265 | /* |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1266 | * Mesh beacons will update last_rx when if they are found to |
| 1267 | * match the current local configuration when processed. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1268 | */ |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1269 | sta->last_rx = jiffies; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1270 | if (ieee80211_is_data(hdr->frame_control)) { |
| 1271 | sta->last_rx_rate_idx = status->rate_idx; |
| 1272 | sta->last_rx_rate_flag = status->flag; |
Chun-Yeow Yeoh | b8ff416 | 2014-02-27 13:14:14 +0800 | [diff] [blame] | 1273 | sta->last_rx_rate_vht_flag = status->vht_flag; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 1274 | sta->last_rx_rate_vht_nss = status->vht_nss; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1275 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1276 | } |
| 1277 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1278 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1279 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1280 | |
Kalle Valo | 3cf335d | 2009-03-22 21:57:06 +0200 | [diff] [blame] | 1281 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
| 1282 | ieee80211_sta_rx_notify(rx->sdata, hdr); |
| 1283 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1284 | sta->rx_fragments++; |
| 1285 | sta->rx_bytes += rx->skb->len; |
Felix Fietkau | fe8431f | 2012-03-01 18:00:07 +0100 | [diff] [blame] | 1286 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
| 1287 | sta->last_signal = status->signal; |
| 1288 | ewma_add(&sta->avg_signal, -status->signal); |
| 1289 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1290 | |
Felix Fietkau | ef0621e | 2013-04-22 16:29:31 +0200 | [diff] [blame] | 1291 | if (status->chains) { |
| 1292 | sta->chains = status->chains; |
| 1293 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { |
| 1294 | int signal = status->chain_signal[i]; |
| 1295 | |
| 1296 | if (!(status->chains & BIT(i))) |
| 1297 | continue; |
| 1298 | |
| 1299 | sta->chain_signal_last[i] = signal; |
| 1300 | ewma_add(&sta->chain_signal_avg[i], -signal); |
| 1301 | } |
| 1302 | } |
| 1303 | |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1304 | /* |
| 1305 | * Change STA power saving mode only at the end of a frame |
| 1306 | * exchange sequence. |
| 1307 | */ |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1308 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
| 1309 | !ieee80211_has_morefrags(hdr->frame_control) && |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 1310 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1311 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
Johannes Berg | b4ba544 | 2014-01-24 14:41:44 +0100 | [diff] [blame] | 1312 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
| 1313 | /* PM bit is only checked in frames where it isn't reserved, |
| 1314 | * in AP mode it's reserved in non-bufferable management frames |
| 1315 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) |
| 1316 | */ |
| 1317 | (!ieee80211_is_mgmt(hdr->frame_control) || |
| 1318 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1319 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
Johannes Berg | b4ba544 | 2014-01-24 14:41:44 +0100 | [diff] [blame] | 1320 | if (!ieee80211_has_pm(hdr->frame_control)) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1321 | sta_ps_end(sta); |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1322 | } else { |
| 1323 | if (ieee80211_has_pm(hdr->frame_control)) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1324 | sta_ps_start(sta); |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1325 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1326 | } |
| 1327 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 1328 | /* mesh power save support */ |
| 1329 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
| 1330 | ieee80211_mps_rx_h_sta_process(sta, hdr); |
| 1331 | |
Johannes Berg | 22403de | 2009-10-30 12:55:03 +0100 | [diff] [blame] | 1332 | /* |
| 1333 | * Drop (qos-)data::nullfunc frames silently, since they |
| 1334 | * are used only to control station power saving mode. |
| 1335 | */ |
| 1336 | if (ieee80211_is_nullfunc(hdr->frame_control) || |
| 1337 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1338 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1339 | |
| 1340 | /* |
| 1341 | * If we receive a 4-addr nullfunc frame from a STA |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1342 | * that was not moved to a 4-addr STA vlan yet send |
| 1343 | * the event to userspace and for older hostapd drop |
| 1344 | * the frame to the monitor interface. |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1345 | */ |
| 1346 | if (ieee80211_has_a4(hdr->frame_control) && |
| 1347 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
| 1348 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1349 | !rx->sdata->u.vlan.sta))) { |
| 1350 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) |
| 1351 | cfg80211_rx_unexpected_4addr_frame( |
| 1352 | rx->sdata->dev, sta->sta.addr, |
| 1353 | GFP_ATOMIC); |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1354 | return RX_DROP_MONITOR; |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1355 | } |
Johannes Berg | 22403de | 2009-10-30 12:55:03 +0100 | [diff] [blame] | 1356 | /* |
| 1357 | * Update counter and free packet here to avoid |
| 1358 | * counting this as a dropped packed. |
| 1359 | */ |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1360 | sta->rx_packets++; |
| 1361 | dev_kfree_skb(rx->skb); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1362 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1363 | } |
| 1364 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1365 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1366 | } /* ieee80211_rx_h_sta_process */ |
| 1367 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1368 | static ieee80211_rx_result debug_noinline |
| 1369 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) |
| 1370 | { |
| 1371 | struct sk_buff *skb = rx->skb; |
| 1372 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1373 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 1374 | int keyidx; |
| 1375 | int hdrlen; |
| 1376 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
| 1377 | struct ieee80211_key *sta_ptk = NULL; |
| 1378 | int mmie_keyidx = -1; |
| 1379 | __le16 fc; |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1380 | const struct ieee80211_cipher_scheme *cs = NULL; |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1381 | |
| 1382 | /* |
| 1383 | * Key selection 101 |
| 1384 | * |
| 1385 | * There are four types of keys: |
| 1386 | * - GTK (group keys) |
| 1387 | * - IGTK (group keys for management frames) |
| 1388 | * - PTK (pairwise keys) |
| 1389 | * - STK (station-to-station pairwise keys) |
| 1390 | * |
| 1391 | * When selecting a key, we have to distinguish between multicast |
| 1392 | * (including broadcast) and unicast frames, the latter can only |
| 1393 | * use PTKs and STKs while the former always use GTKs and IGTKs. |
| 1394 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then |
| 1395 | * unicast frames can also use key indices like GTKs. Hence, if we |
| 1396 | * don't have a PTK/STK we check the key index for a WEP key. |
| 1397 | * |
| 1398 | * Note that in a regular BSS, multicast frames are sent by the |
| 1399 | * AP only, associated stations unicast the frame to the AP first |
| 1400 | * which then multicasts it on their behalf. |
| 1401 | * |
| 1402 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
| 1403 | * with each station, that is something we don't currently handle. |
| 1404 | * The spec seems to expect that one negotiates the same key with |
| 1405 | * every station but there's no such requirement; VLANs could be |
| 1406 | * possible. |
| 1407 | */ |
| 1408 | |
| 1409 | /* |
| 1410 | * No point in finding a key and decrypting if the frame is neither |
| 1411 | * addressed to us nor a multicast frame. |
| 1412 | */ |
| 1413 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 1414 | return RX_CONTINUE; |
| 1415 | |
| 1416 | /* start without a key */ |
| 1417 | rx->key = NULL; |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1418 | fc = hdr->frame_control; |
| 1419 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1420 | if (rx->sta) { |
| 1421 | int keyid = rx->sta->ptk_idx; |
| 1422 | |
| 1423 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
| 1424 | cs = rx->sta->cipher_scheme; |
| 1425 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); |
| 1426 | if (unlikely(keyid < 0)) |
| 1427 | return RX_DROP_UNUSABLE; |
| 1428 | } |
| 1429 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); |
| 1430 | } |
| 1431 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1432 | if (!ieee80211_has_protected(fc)) |
| 1433 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); |
| 1434 | |
| 1435 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { |
| 1436 | rx->key = sta_ptk; |
| 1437 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1438 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1439 | return RX_CONTINUE; |
| 1440 | /* Skip decryption if the frame is not protected. */ |
| 1441 | if (!ieee80211_has_protected(fc)) |
| 1442 | return RX_CONTINUE; |
| 1443 | } else if (mmie_keyidx >= 0) { |
| 1444 | /* Broadcast/multicast robust management frame / BIP */ |
| 1445 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1446 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1447 | return RX_CONTINUE; |
| 1448 | |
| 1449 | if (mmie_keyidx < NUM_DEFAULT_KEYS || |
| 1450 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) |
| 1451 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ |
| 1452 | if (rx->sta) |
| 1453 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); |
| 1454 | if (!rx->key) |
| 1455 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); |
| 1456 | } else if (!ieee80211_has_protected(fc)) { |
| 1457 | /* |
| 1458 | * The frame was not protected, so skip decryption. However, we |
| 1459 | * need to set rx->key if there is a key that could have been |
| 1460 | * used so that the frame may be dropped if encryption would |
| 1461 | * have been expected. |
| 1462 | */ |
| 1463 | struct ieee80211_key *key = NULL; |
| 1464 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1465 | int i; |
| 1466 | |
| 1467 | if (ieee80211_is_mgmt(fc) && |
| 1468 | is_multicast_ether_addr(hdr->addr1) && |
| 1469 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) |
| 1470 | rx->key = key; |
| 1471 | else { |
| 1472 | if (rx->sta) { |
| 1473 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
| 1474 | key = rcu_dereference(rx->sta->gtk[i]); |
| 1475 | if (key) |
| 1476 | break; |
| 1477 | } |
| 1478 | } |
| 1479 | if (!key) { |
| 1480 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
| 1481 | key = rcu_dereference(sdata->keys[i]); |
| 1482 | if (key) |
| 1483 | break; |
| 1484 | } |
| 1485 | } |
| 1486 | if (key) |
| 1487 | rx->key = key; |
| 1488 | } |
| 1489 | return RX_CONTINUE; |
| 1490 | } else { |
| 1491 | u8 keyid; |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1492 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1493 | /* |
| 1494 | * The device doesn't give us the IV so we won't be |
| 1495 | * able to look up the key. That's ok though, we |
| 1496 | * don't need to decrypt the frame, we just won't |
| 1497 | * be able to keep statistics accurate. |
| 1498 | * Except for key threshold notifications, should |
| 1499 | * we somehow allow the driver to tell us which key |
| 1500 | * the hardware used if this flag is set? |
| 1501 | */ |
| 1502 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1503 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1504 | return RX_CONTINUE; |
| 1505 | |
| 1506 | hdrlen = ieee80211_hdrlen(fc); |
| 1507 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1508 | if (cs) { |
| 1509 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1510 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1511 | if (unlikely(keyidx < 0)) |
| 1512 | return RX_DROP_UNUSABLE; |
| 1513 | } else { |
| 1514 | if (rx->skb->len < 8 + hdrlen) |
| 1515 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
| 1516 | /* |
| 1517 | * no need to call ieee80211_wep_get_keyidx, |
| 1518 | * it verifies a bunch of things we've done already |
| 1519 | */ |
| 1520 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); |
| 1521 | keyidx = keyid >> 6; |
| 1522 | } |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1523 | |
| 1524 | /* check per-station GTK first, if multicast packet */ |
| 1525 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) |
| 1526 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); |
| 1527 | |
| 1528 | /* if not found, try default key */ |
| 1529 | if (!rx->key) { |
| 1530 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); |
| 1531 | |
| 1532 | /* |
| 1533 | * RSNA-protected unicast frames should always be |
| 1534 | * sent with pairwise or station-to-station keys, |
| 1535 | * but for WEP we allow using a key index as well. |
| 1536 | */ |
| 1537 | if (rx->key && |
| 1538 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && |
| 1539 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && |
| 1540 | !is_multicast_ether_addr(hdr->addr1)) |
| 1541 | rx->key = NULL; |
| 1542 | } |
| 1543 | } |
| 1544 | |
| 1545 | if (rx->key) { |
| 1546 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) |
| 1547 | return RX_DROP_MONITOR; |
| 1548 | |
| 1549 | rx->key->tx_rx_count++; |
| 1550 | /* TODO: add threshold stuff again */ |
| 1551 | } else { |
| 1552 | return RX_DROP_MONITOR; |
| 1553 | } |
| 1554 | |
| 1555 | switch (rx->key->conf.cipher) { |
| 1556 | case WLAN_CIPHER_SUITE_WEP40: |
| 1557 | case WLAN_CIPHER_SUITE_WEP104: |
| 1558 | result = ieee80211_crypto_wep_decrypt(rx); |
| 1559 | break; |
| 1560 | case WLAN_CIPHER_SUITE_TKIP: |
| 1561 | result = ieee80211_crypto_tkip_decrypt(rx); |
| 1562 | break; |
| 1563 | case WLAN_CIPHER_SUITE_CCMP: |
| 1564 | result = ieee80211_crypto_ccmp_decrypt(rx); |
| 1565 | break; |
| 1566 | case WLAN_CIPHER_SUITE_AES_CMAC: |
| 1567 | result = ieee80211_crypto_aes_cmac_decrypt(rx); |
| 1568 | break; |
| 1569 | default: |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1570 | result = ieee80211_crypto_hw_decrypt(rx); |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1571 | } |
| 1572 | |
| 1573 | /* the hdr variable is invalid after the decrypt handlers */ |
| 1574 | |
| 1575 | /* either the frame has been decrypted or will be dropped */ |
| 1576 | status->flag |= RX_FLAG_DECRYPTED; |
| 1577 | |
| 1578 | return result; |
| 1579 | } |
| 1580 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1581 | static inline struct ieee80211_fragment_entry * |
| 1582 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, |
| 1583 | unsigned int frag, unsigned int seq, int rx_queue, |
| 1584 | struct sk_buff **skb) |
| 1585 | { |
| 1586 | struct ieee80211_fragment_entry *entry; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1587 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1588 | entry = &sdata->fragments[sdata->fragment_next++]; |
| 1589 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) |
| 1590 | sdata->fragment_next = 0; |
| 1591 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1592 | if (!skb_queue_empty(&entry->skb_list)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1593 | __skb_queue_purge(&entry->skb_list); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1594 | |
| 1595 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ |
| 1596 | *skb = NULL; |
| 1597 | entry->first_frag_time = jiffies; |
| 1598 | entry->seq = seq; |
| 1599 | entry->rx_queue = rx_queue; |
| 1600 | entry->last_frag = frag; |
| 1601 | entry->ccmp = 0; |
| 1602 | entry->extra_len = 0; |
| 1603 | |
| 1604 | return entry; |
| 1605 | } |
| 1606 | |
| 1607 | static inline struct ieee80211_fragment_entry * |
| 1608 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1609 | unsigned int frag, unsigned int seq, |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1610 | int rx_queue, struct ieee80211_hdr *hdr) |
| 1611 | { |
| 1612 | struct ieee80211_fragment_entry *entry; |
| 1613 | int i, idx; |
| 1614 | |
| 1615 | idx = sdata->fragment_next; |
| 1616 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { |
| 1617 | struct ieee80211_hdr *f_hdr; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1618 | |
| 1619 | idx--; |
| 1620 | if (idx < 0) |
| 1621 | idx = IEEE80211_FRAGMENT_MAX - 1; |
| 1622 | |
| 1623 | entry = &sdata->fragments[idx]; |
| 1624 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || |
| 1625 | entry->rx_queue != rx_queue || |
| 1626 | entry->last_frag + 1 != frag) |
| 1627 | continue; |
| 1628 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1629 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1630 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1631 | /* |
| 1632 | * Check ftype and addresses are equal, else check next fragment |
| 1633 | */ |
| 1634 | if (((hdr->frame_control ^ f_hdr->frame_control) & |
| 1635 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1636 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
| 1637 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1638 | continue; |
| 1639 | |
S.Çağlar Onur | ab46623 | 2008-02-14 17:36:47 +0200 | [diff] [blame] | 1640 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1641 | __skb_queue_purge(&entry->skb_list); |
| 1642 | continue; |
| 1643 | } |
| 1644 | return entry; |
| 1645 | } |
| 1646 | |
| 1647 | return NULL; |
| 1648 | } |
| 1649 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1650 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1651 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1652 | { |
| 1653 | struct ieee80211_hdr *hdr; |
| 1654 | u16 sc; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1655 | __le16 fc; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1656 | unsigned int frag, seq; |
| 1657 | struct ieee80211_fragment_entry *entry; |
| 1658 | struct sk_buff *skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1659 | struct ieee80211_rx_status *status; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1660 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1661 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1662 | fc = hdr->frame_control; |
Javier Cardona | f7fbf70 | 2012-10-25 11:10:18 -0700 | [diff] [blame] | 1663 | |
| 1664 | if (ieee80211_is_ctl(fc)) |
| 1665 | return RX_CONTINUE; |
| 1666 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1667 | sc = le16_to_cpu(hdr->seq_ctrl); |
| 1668 | frag = sc & IEEE80211_SCTL_FRAG; |
| 1669 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1670 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1671 | is_multicast_ether_addr(hdr->addr1))) { |
| 1672 | /* not fragmented */ |
| 1673 | goto out; |
| 1674 | } |
| 1675 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
| 1676 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 1677 | if (skb_linearize(rx->skb)) |
| 1678 | return RX_DROP_UNUSABLE; |
| 1679 | |
Abhijeet Kolekar | 058897a | 2010-05-11 11:22:11 -0700 | [diff] [blame] | 1680 | /* |
| 1681 | * skb_linearize() might change the skb->data and |
| 1682 | * previously cached variables (in this case, hdr) need to |
| 1683 | * be refreshed with the new data. |
| 1684 | */ |
| 1685 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1686 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
| 1687 | |
| 1688 | if (frag == 0) { |
| 1689 | /* This is the first fragment of a new frame. */ |
| 1690 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1691 | rx->seqno_idx, &(rx->skb)); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1692 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1693 | ieee80211_has_protected(fc)) { |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1694 | int queue = rx->security_idx; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1695 | /* Store CCMP PN so that we can verify that the next |
| 1696 | * fragment has a sequential PN value. */ |
| 1697 | entry->ccmp = 1; |
| 1698 | memcpy(entry->last_pn, |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1699 | rx->key->u.ccmp.rx_pn[queue], |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1700 | IEEE80211_CCMP_PN_LEN); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1701 | } |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1702 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1703 | } |
| 1704 | |
| 1705 | /* This is a fragment for a frame that should already be pending in |
| 1706 | * fragment cache. Add this fragment to the end of the pending entry. |
| 1707 | */ |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1708 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
| 1709 | rx->seqno_idx, hdr); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1710 | if (!entry) { |
| 1711 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1712 | return RX_DROP_MONITOR; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1713 | } |
| 1714 | |
| 1715 | /* Verify that MPDUs within one MSDU have sequential PN values. |
| 1716 | * (IEEE 802.11i, 8.3.3.4.5) */ |
| 1717 | if (entry->ccmp) { |
| 1718 | int i; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1719 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1720 | int queue; |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1721 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1722 | return RX_DROP_UNUSABLE; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1723 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
| 1724 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1725 | pn[i]++; |
| 1726 | if (pn[i]) |
| 1727 | break; |
| 1728 | } |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1729 | queue = rx->security_idx; |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1730 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1731 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1732 | return RX_DROP_UNUSABLE; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1733 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1734 | } |
| 1735 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1736 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1737 | __skb_queue_tail(&entry->skb_list, rx->skb); |
| 1738 | entry->last_frag = frag; |
| 1739 | entry->extra_len += rx->skb->len; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1740 | if (ieee80211_has_morefrags(fc)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1741 | rx->skb = NULL; |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1742 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1743 | } |
| 1744 | |
| 1745 | rx->skb = __skb_dequeue(&entry->skb_list); |
| 1746 | if (skb_tailroom(rx->skb) < entry->extra_len) { |
| 1747 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); |
| 1748 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, |
| 1749 | GFP_ATOMIC))) { |
| 1750 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); |
| 1751 | __skb_queue_purge(&entry->skb_list); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1752 | return RX_DROP_UNUSABLE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1753 | } |
| 1754 | } |
| 1755 | while ((skb = __skb_dequeue(&entry->skb_list))) { |
| 1756 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); |
| 1757 | dev_kfree_skb(skb); |
| 1758 | } |
| 1759 | |
| 1760 | /* Complete frame has been reassembled - process it now */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1761 | status = IEEE80211_SKB_RXCB(rx->skb); |
| 1762 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1763 | |
| 1764 | out: |
| 1765 | if (rx->sta) |
| 1766 | rx->sta->rx_packets++; |
| 1767 | if (is_multicast_ether_addr(hdr->addr1)) |
| 1768 | rx->local->dot11MulticastReceivedFrameCount++; |
| 1769 | else |
| 1770 | ieee80211_led_rx(rx->local); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1771 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1772 | } |
| 1773 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1774 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1775 | { |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1776 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1777 | return -EACCES; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1778 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1779 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1780 | } |
| 1781 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1782 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1783 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1784 | struct sk_buff *skb = rx->skb; |
| 1785 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1786 | |
Johannes Berg | 3017b80 | 2007-08-28 17:01:53 -0400 | [diff] [blame] | 1787 | /* |
Johannes Berg | 7848ba7 | 2007-09-14 11:10:25 -0400 | [diff] [blame] | 1788 | * Pass through unencrypted frames if the hardware has |
| 1789 | * decrypted them already. |
Johannes Berg | 3017b80 | 2007-08-28 17:01:53 -0400 | [diff] [blame] | 1790 | */ |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1791 | if (status->flag & RX_FLAG_DECRYPTED) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1792 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1793 | |
| 1794 | /* Drop unencrypted frames if key is set. */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1795 | if (unlikely(!ieee80211_has_protected(fc) && |
| 1796 | !ieee80211_is_nullfunc(fc) && |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1797 | ieee80211_is_data(fc) && |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 1798 | (rx->key || rx->sdata->drop_unencrypted))) |
| 1799 | return -EACCES; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1800 | |
| 1801 | return 0; |
| 1802 | } |
| 1803 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1804 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1805 | { |
| 1806 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Jouni Malinen | e3efca0 | 2010-03-28 22:31:15 -0700 | [diff] [blame] | 1807 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1808 | __le16 fc = hdr->frame_control; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1809 | |
Jouni Malinen | e3efca0 | 2010-03-28 22:31:15 -0700 | [diff] [blame] | 1810 | /* |
| 1811 | * Pass through unencrypted frames if the hardware has |
| 1812 | * decrypted them already. |
| 1813 | */ |
| 1814 | if (status->flag & RX_FLAG_DECRYPTED) |
| 1815 | return 0; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1816 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1817 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
Jouni Malinen | d211e90 | 2010-03-28 22:29:52 -0700 | [diff] [blame] | 1818 | if (unlikely(!ieee80211_has_protected(fc) && |
| 1819 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1820 | rx->key)) { |
Johannes Berg | 6ff57cf | 2013-05-16 00:55:00 +0200 | [diff] [blame] | 1821 | if (ieee80211_is_deauth(fc) || |
| 1822 | ieee80211_is_disassoc(fc)) |
| 1823 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, |
| 1824 | rx->skb->data, |
| 1825 | rx->skb->len); |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1826 | return -EACCES; |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1827 | } |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1828 | /* BIP does not use Protected field, so need to check MMIE */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1829 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1830 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
Johannes Berg | 6ff57cf | 2013-05-16 00:55:00 +0200 | [diff] [blame] | 1831 | if (ieee80211_is_deauth(fc) || |
| 1832 | ieee80211_is_disassoc(fc)) |
| 1833 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, |
| 1834 | rx->skb->data, |
| 1835 | rx->skb->len); |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1836 | return -EACCES; |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1837 | } |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1838 | /* |
| 1839 | * When using MFP, Action frames are not allowed prior to |
| 1840 | * having configured keys. |
| 1841 | */ |
| 1842 | if (unlikely(ieee80211_is_action(fc) && !rx->key && |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 1843 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1844 | return -EACCES; |
| 1845 | } |
Johannes Berg | b3fc9c6 | 2008-04-13 10:12:47 +0200 | [diff] [blame] | 1846 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1847 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1848 | } |
| 1849 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1850 | static int |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1851 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1852 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1853 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1854 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1855 | bool check_port_control = false; |
| 1856 | struct ethhdr *ehdr; |
| 1857 | int ret; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1858 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1859 | *port_control = false; |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1860 | if (ieee80211_has_a4(hdr->frame_control) && |
| 1861 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1862 | return -1; |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1863 | |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1864 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
| 1865 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { |
| 1866 | |
| 1867 | if (!sdata->u.mgd.use_4addr) |
| 1868 | return -1; |
| 1869 | else |
| 1870 | check_port_control = true; |
| 1871 | } |
| 1872 | |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1873 | if (is_multicast_ether_addr(hdr->addr1) && |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1874 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1875 | return -1; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1876 | |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1877 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1878 | if (ret < 0) |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1879 | return ret; |
| 1880 | |
| 1881 | ehdr = (struct ethhdr *) rx->skb->data; |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1882 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
| 1883 | *port_control = true; |
| 1884 | else if (check_port_control) |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1885 | return -1; |
| 1886 | |
| 1887 | return 0; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1888 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1889 | |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1890 | /* |
| 1891 | * requires that rx->skb is a frame with ethernet header |
| 1892 | */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1893 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1894 | { |
Senthil Balasubramanian | c97c23e | 2008-05-28 23:15:32 +0530 | [diff] [blame] | 1895 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1896 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
| 1897 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
| 1898 | |
| 1899 | /* |
| 1900 | * Allow EAPOL frames to us/the PAE group address regardless |
| 1901 | * of whether the frame was encrypted or not. |
| 1902 | */ |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 1903 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
Joe Perches | 3bc7945 | 2012-05-08 18:56:53 +0000 | [diff] [blame] | 1904 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
| 1905 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1906 | return true; |
| 1907 | |
| 1908 | if (ieee80211_802_1x_port_control(rx) || |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1909 | ieee80211_drop_unencrypted(rx, fc)) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1910 | return false; |
| 1911 | |
| 1912 | return true; |
| 1913 | } |
| 1914 | |
| 1915 | /* |
| 1916 | * requires that rx->skb is a frame with ethernet header |
| 1917 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1918 | static void |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1919 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1920 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1921 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1922 | struct net_device *dev = sdata->dev; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1923 | struct sk_buff *skb, *xmit_skb; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1924 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
| 1925 | struct sta_info *dsta; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1926 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1927 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1928 | skb = rx->skb; |
| 1929 | xmit_skb = NULL; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1930 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1931 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
| 1932 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
Johannes Berg | 213cd11 | 2008-09-11 00:01:54 +0200 | [diff] [blame] | 1933 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1934 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1935 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1936 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
| 1937 | /* |
| 1938 | * send multicast frames both to higher layers in |
| 1939 | * local net stack and back to the wireless medium |
| 1940 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1941 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1942 | if (!xmit_skb) |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1943 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1944 | dev->name); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1945 | } else { |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 1946 | dsta = sta_info_get(sdata, skb->data); |
| 1947 | if (dsta) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1948 | /* |
| 1949 | * The destination station is associated to |
| 1950 | * this AP (in this VLAN), so send the frame |
| 1951 | * directly to it and do not pass it to local |
| 1952 | * net stack. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1953 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1954 | xmit_skb = skb; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1955 | skb = NULL; |
| 1956 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1957 | } |
| 1958 | } |
| 1959 | |
Kalle Valo | 59d9cb0 | 2009-12-17 13:54:57 +0100 | [diff] [blame] | 1960 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1961 | if (skb) { |
| 1962 | /* 'align' will only take the values 0 or 2 here since all |
| 1963 | * frames are required to be aligned to 2-byte boundaries |
| 1964 | * when being passed to mac80211; the code here works just |
| 1965 | * as well if that isn't true, but mac80211 assumes it can |
| 1966 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1967 | */ |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1968 | int align; |
| 1969 | |
| 1970 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1971 | if (align) { |
| 1972 | if (WARN_ON(skb_headroom(skb) < 3)) { |
| 1973 | dev_kfree_skb(skb); |
| 1974 | skb = NULL; |
| 1975 | } else { |
| 1976 | u8 *data = skb->data; |
Zhu Yi | 8ce0b58 | 2009-10-28 13:13:52 -0700 | [diff] [blame] | 1977 | size_t len = skb_headlen(skb); |
| 1978 | skb->data -= align; |
| 1979 | memmove(skb->data, data, len); |
| 1980 | skb_set_tail_pointer(skb, len); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1981 | } |
| 1982 | } |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1983 | } |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1984 | #endif |
| 1985 | |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1986 | if (skb) { |
| 1987 | /* deliver to local stack */ |
| 1988 | skb->protocol = eth_type_trans(skb, dev); |
| 1989 | memset(skb->cb, 0, sizeof(skb->cb)); |
Johannes Berg | 06d181a | 2014-02-04 20:51:09 +0100 | [diff] [blame] | 1990 | if (rx->local->napi) |
| 1991 | napi_gro_receive(rx->local->napi, skb); |
| 1992 | else |
| 1993 | netif_receive_skb(skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1994 | } |
| 1995 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1996 | if (xmit_skb) { |
Helmut Schaa | aef6c92 | 2011-12-21 09:11:35 +0100 | [diff] [blame] | 1997 | /* |
| 1998 | * Send to wireless media and increase priority by 256 to |
| 1999 | * keep the received priority instead of reclassifying |
| 2000 | * the frame (see cfg80211_classify8021d). |
| 2001 | */ |
| 2002 | xmit_skb->priority += 256; |
YOSHIFUJI Hideaki | f831e90 | 2007-12-12 03:54:23 +0900 | [diff] [blame] | 2003 | xmit_skb->protocol = htons(ETH_P_802_3); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2004 | skb_reset_network_header(xmit_skb); |
| 2005 | skb_reset_mac_header(xmit_skb); |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2006 | dev_queue_xmit(xmit_skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2007 | } |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2008 | } |
| 2009 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2010 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2011 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2012 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2013 | struct net_device *dev = rx->sdata->dev; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2014 | struct sk_buff *skb = rx->skb; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2015 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 2016 | __le16 fc = hdr->frame_control; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2017 | struct sk_buff_head frame_list; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2018 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2019 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2020 | if (unlikely(!ieee80211_is_data(fc))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2021 | return RX_CONTINUE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2022 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2023 | if (unlikely(!ieee80211_is_data_present(fc))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2024 | return RX_DROP_MONITOR; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2025 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2026 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2027 | return RX_CONTINUE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2028 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2029 | if (ieee80211_has_a4(hdr->frame_control) && |
| 2030 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2031 | !rx->sdata->u.vlan.sta) |
| 2032 | return RX_DROP_UNUSABLE; |
| 2033 | |
| 2034 | if (is_multicast_ether_addr(hdr->addr1) && |
| 2035 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2036 | rx->sdata->u.vlan.sta) || |
| 2037 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && |
| 2038 | rx->sdata->u.mgd.use_4addr))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2039 | return RX_DROP_UNUSABLE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2040 | |
| 2041 | skb->dev = dev; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2042 | __skb_queue_head_init(&frame_list); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2043 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 2044 | if (skb_linearize(skb)) |
| 2045 | return RX_DROP_UNUSABLE; |
| 2046 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2047 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
| 2048 | rx->sdata->vif.type, |
Yogesh Ashok Powar | 8b3beca | 2011-05-13 11:22:31 -0700 | [diff] [blame] | 2049 | rx->local->hw.extra_tx_headroom, true); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2050 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2051 | while (!skb_queue_empty(&frame_list)) { |
| 2052 | rx->skb = __skb_dequeue(&frame_list); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2053 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2054 | if (!ieee80211_frame_allowed(rx, fc)) { |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2055 | dev_kfree_skb(rx->skb); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2056 | continue; |
| 2057 | } |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2058 | dev->stats.rx_packets++; |
| 2059 | dev->stats.rx_bytes += rx->skb->len; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2060 | |
| 2061 | ieee80211_deliver_skb(rx); |
| 2062 | } |
| 2063 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2064 | return RX_QUEUED; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2065 | } |
| 2066 | |
Ingo Molnar | bf94e17 | 2008-10-12 23:51:38 -0700 | [diff] [blame] | 2067 | #ifdef CONFIG_MAC80211_MESH |
Davide Pesavento | b0dee57 | 2008-09-27 17:29:12 +0200 | [diff] [blame] | 2068 | static ieee80211_rx_result |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2069 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
| 2070 | { |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2071 | struct ieee80211_hdr *fwd_hdr, *hdr; |
| 2072 | struct ieee80211_tx_info *info; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2073 | struct ieee80211s_hdr *mesh_hdr; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2074 | struct sk_buff *skb = rx->skb, *fwd_skb; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2075 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2076 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2077 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2078 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2079 | u16 q, hdrlen; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2080 | |
| 2081 | hdr = (struct ieee80211_hdr *) skb->data; |
| 2082 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2083 | |
| 2084 | /* make sure fixed part of mesh header is there, also checks skb len */ |
| 2085 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) |
| 2086 | return RX_DROP_MONITOR; |
| 2087 | |
| 2088 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| 2089 | |
| 2090 | /* make sure full mesh header is there, also checks skb len */ |
| 2091 | if (!pskb_may_pull(rx->skb, |
| 2092 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) |
| 2093 | return RX_DROP_MONITOR; |
| 2094 | |
| 2095 | /* reload pointers */ |
| 2096 | hdr = (struct ieee80211_hdr *) skb->data; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2097 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| 2098 | |
Thomas Pedersen | 2157fdd | 2011-09-01 12:32:14 -0700 | [diff] [blame] | 2099 | /* frame is in RMC, don't forward */ |
| 2100 | if (ieee80211_is_data(hdr->frame_control) && |
| 2101 | is_multicast_ether_addr(hdr->addr1) && |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2102 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
Thomas Pedersen | 2157fdd | 2011-09-01 12:32:14 -0700 | [diff] [blame] | 2103 | return RX_DROP_MONITOR; |
| 2104 | |
Javier Cardona | 555cb71 | 2012-10-24 12:43:30 -0700 | [diff] [blame] | 2105 | if (!ieee80211_is_data(hdr->frame_control) || |
| 2106 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2107 | return RX_CONTINUE; |
| 2108 | |
| 2109 | if (!mesh_hdr->ttl) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2110 | return RX_DROP_MONITOR; |
| 2111 | |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2112 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2113 | struct mesh_path *mppath; |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2114 | char *proxied_addr; |
| 2115 | char *mpp_addr; |
| 2116 | |
| 2117 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 2118 | mpp_addr = hdr->addr3; |
| 2119 | proxied_addr = mesh_hdr->eaddr1; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2120 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
| 2121 | /* has_a4 already checked in ieee80211_rx_mesh_check */ |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2122 | mpp_addr = hdr->addr4; |
| 2123 | proxied_addr = mesh_hdr->eaddr2; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2124 | } else { |
| 2125 | return RX_DROP_MONITOR; |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2126 | } |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2127 | |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2128 | rcu_read_lock(); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2129 | mppath = mpp_path_lookup(sdata, proxied_addr); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2130 | if (!mppath) { |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2131 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2132 | } else { |
| 2133 | spin_lock_bh(&mppath->state_lock); |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2134 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2135 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2136 | spin_unlock_bh(&mppath->state_lock); |
| 2137 | } |
| 2138 | rcu_read_unlock(); |
| 2139 | } |
| 2140 | |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2141 | /* Frame has reached destination. Don't forward */ |
| 2142 | if (!is_multicast_ether_addr(hdr->addr1) && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2143 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2144 | return RX_CONTINUE; |
| 2145 | |
Yoni Divinsky | 00e96de | 2012-06-20 15:39:13 +0300 | [diff] [blame] | 2146 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
Thomas Pedersen | d3c1597 | 2011-11-24 17:15:23 -0800 | [diff] [blame] | 2147 | if (ieee80211_queue_stopped(&local->hw, q)) { |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2148 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
Thomas Pedersen | d3c1597 | 2011-11-24 17:15:23 -0800 | [diff] [blame] | 2149 | return RX_DROP_MONITOR; |
| 2150 | } |
| 2151 | skb_set_queue_mapping(skb, q); |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2152 | |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2153 | if (!--mesh_hdr->ttl) { |
| 2154 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); |
Javier Cardona | 2ac64cd | 2012-10-24 12:43:31 -0700 | [diff] [blame] | 2155 | goto out; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2156 | } |
| 2157 | |
Chun-Yeow Yeoh | d665508 | 2012-03-02 02:03:19 +0800 | [diff] [blame] | 2158 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
| 2159 | goto out; |
| 2160 | |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2161 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
| 2162 | if (!fwd_skb) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 2163 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2164 | sdata->name); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2165 | goto out; |
| 2166 | } |
| 2167 | |
| 2168 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; |
Thomas Pedersen | 9d6d6f4 | 2013-04-08 11:06:12 -0700 | [diff] [blame] | 2169 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2170 | info = IEEE80211_SKB_CB(fwd_skb); |
| 2171 | memset(info, 0, sizeof(*info)); |
| 2172 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
| 2173 | info->control.vif = &rx->sdata->vif; |
| 2174 | info->control.jiffies = jiffies; |
| 2175 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { |
| 2176 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); |
| 2177 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2178 | /* update power mode indication when forwarding */ |
| 2179 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2180 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2181 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2182 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
| 2183 | } else { |
| 2184 | /* unable to resolve next hop */ |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2185 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
Chun-Yeow Yeoh | f63f842 | 2013-11-13 15:39:12 +0800 | [diff] [blame] | 2186 | fwd_hdr->addr3, 0, |
| 2187 | WLAN_REASON_MESH_PATH_NOFORWARD, |
| 2188 | fwd_hdr->addr2); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2189 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
Jesper Juhl | 74b8cc3 | 2012-01-14 21:52:17 +0100 | [diff] [blame] | 2190 | kfree_skb(fwd_skb); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2191 | return RX_DROP_MONITOR; |
| 2192 | } |
| 2193 | |
| 2194 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
| 2195 | ieee80211_add_pending_skb(local, fwd_skb); |
Johannes Berg | b51aff0 | 2010-12-22 10:15:07 +0100 | [diff] [blame] | 2196 | out: |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2197 | if (is_multicast_ether_addr(hdr->addr1) || |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2198 | sdata->dev->flags & IFF_PROMISC) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2199 | return RX_CONTINUE; |
| 2200 | else |
| 2201 | return RX_DROP_MONITOR; |
| 2202 | } |
Ingo Molnar | bf94e17 | 2008-10-12 23:51:38 -0700 | [diff] [blame] | 2203 | #endif |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2204 | |
| 2205 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2206 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2207 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2208 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Vivek Natarajan | e15276a | 2010-02-08 17:47:01 +0530 | [diff] [blame] | 2209 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2210 | struct net_device *dev = sdata->dev; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2211 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
| 2212 | __le16 fc = hdr->frame_control; |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2213 | bool port_control; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2214 | int err; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2215 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2216 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2217 | return RX_CONTINUE; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2218 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2219 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2220 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2221 | |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2222 | /* |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2223 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
| 2224 | * also drop the frame to cooked monitor interfaces. |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2225 | */ |
| 2226 | if (ieee80211_has_a4(hdr->frame_control) && |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2227 | sdata->vif.type == NL80211_IFTYPE_AP) { |
| 2228 | if (rx->sta && |
| 2229 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) |
| 2230 | cfg80211_rx_unexpected_4addr_frame( |
| 2231 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2232 | return RX_DROP_MONITOR; |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2233 | } |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2234 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2235 | err = __ieee80211_data_to_8023(rx, &port_control); |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2236 | if (unlikely(err)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2237 | return RX_DROP_UNUSABLE; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2238 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2239 | if (!ieee80211_frame_allowed(rx, fc)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2240 | return RX_DROP_MONITOR; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2241 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2242 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2243 | unlikely(port_control) && sdata->bss) { |
| 2244 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
| 2245 | u.ap); |
| 2246 | dev = sdata->dev; |
| 2247 | rx->sdata = sdata; |
| 2248 | } |
| 2249 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2250 | rx->skb->dev = dev; |
| 2251 | |
| 2252 | dev->stats.rx_packets++; |
| 2253 | dev->stats.rx_bytes += rx->skb->len; |
| 2254 | |
Helmut Schaa | 08ca944 | 2010-11-30 12:19:34 +0100 | [diff] [blame] | 2255 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
Rajkumar Manoharan | 8c99f69 | 2011-02-02 22:57:53 +0530 | [diff] [blame] | 2256 | !is_multicast_ether_addr( |
| 2257 | ((struct ethhdr *)rx->skb->data)->h_dest) && |
| 2258 | (!local->scanning && |
| 2259 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { |
Vivek Natarajan | e15276a | 2010-02-08 17:47:01 +0530 | [diff] [blame] | 2260 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 2261 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); |
| 2262 | } |
| 2263 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2264 | ieee80211_deliver_skb(rx); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2265 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2266 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2267 | } |
| 2268 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2269 | static ieee80211_rx_result debug_noinline |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2270 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2271 | { |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2272 | struct sk_buff *skb = rx->skb; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2273 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2274 | struct tid_ampdu_rx *tid_agg_rx; |
| 2275 | u16 start_seq_num; |
| 2276 | u16 tid; |
| 2277 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2278 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2279 | return RX_CONTINUE; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2280 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2281 | if (ieee80211_is_back_req(bar->frame_control)) { |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2282 | struct { |
| 2283 | __le16 control, start_seq_num; |
| 2284 | } __packed bar_data; |
| 2285 | |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2286 | if (!rx->sta) |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2287 | return RX_DROP_MONITOR; |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2288 | |
| 2289 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), |
| 2290 | &bar_data, sizeof(bar_data))) |
| 2291 | return RX_DROP_MONITOR; |
| 2292 | |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2293 | tid = le16_to_cpu(bar_data.control) >> 12; |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 2294 | |
| 2295 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); |
| 2296 | if (!tid_agg_rx) |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2297 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2298 | |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2299 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2300 | |
| 2301 | /* reset session timer */ |
Johannes Berg | 20ad19d | 2009-02-10 21:25:45 +0100 | [diff] [blame] | 2302 | if (tid_agg_rx->timeout) |
| 2303 | mod_timer(&tid_agg_rx->session_timer, |
| 2304 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2305 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 2306 | spin_lock(&tid_agg_rx->reorder_lock); |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2307 | /* release stored frames up to start of BAR */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 2308 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2309 | start_seq_num, frames); |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 2310 | spin_unlock(&tid_agg_rx->reorder_lock); |
| 2311 | |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2312 | kfree_skb(skb); |
| 2313 | return RX_QUEUED; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2314 | } |
| 2315 | |
Johannes Berg | 08daeca | 2010-05-30 14:53:43 +0200 | [diff] [blame] | 2316 | /* |
| 2317 | * After this point, we only want management frames, |
| 2318 | * so we can drop all remaining control frames to |
| 2319 | * cooked monitor interfaces. |
| 2320 | */ |
| 2321 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2322 | } |
| 2323 | |
Jouni Malinen | f4f727a | 2009-01-10 11:46:53 +0200 | [diff] [blame] | 2324 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
| 2325 | struct ieee80211_mgmt *mgmt, |
| 2326 | size_t len) |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2327 | { |
| 2328 | struct ieee80211_local *local = sdata->local; |
| 2329 | struct sk_buff *skb; |
| 2330 | struct ieee80211_mgmt *resp; |
| 2331 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2332 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2333 | /* Not to own unicast address */ |
| 2334 | return; |
| 2335 | } |
| 2336 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2337 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
| 2338 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2339 | /* Not from the current AP or not associated yet. */ |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2340 | return; |
| 2341 | } |
| 2342 | |
| 2343 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { |
| 2344 | /* Too short SA Query request frame */ |
| 2345 | return; |
| 2346 | } |
| 2347 | |
| 2348 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); |
| 2349 | if (skb == NULL) |
| 2350 | return; |
| 2351 | |
| 2352 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 2353 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 2354 | memset(resp, 0, 24); |
| 2355 | memcpy(resp->da, mgmt->sa, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2356 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2357 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2358 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 2359 | IEEE80211_STYPE_ACTION); |
| 2360 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); |
| 2361 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; |
| 2362 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; |
| 2363 | memcpy(resp->u.action.u.sa_query.trans_id, |
| 2364 | mgmt->u.action.u.sa_query.trans_id, |
| 2365 | WLAN_SA_QUERY_TR_ID_LEN); |
| 2366 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 2367 | ieee80211_tx_skb(sdata, skb); |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2368 | } |
| 2369 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2370 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2371 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) |
| 2372 | { |
| 2373 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2374 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2375 | |
| 2376 | /* |
| 2377 | * From here on, look only at management frames. |
| 2378 | * Data and control frames are already handled, |
| 2379 | * and unknown (reserved) frames are useless. |
| 2380 | */ |
| 2381 | if (rx->skb->len < 24) |
| 2382 | return RX_DROP_MONITOR; |
| 2383 | |
| 2384 | if (!ieee80211_is_mgmt(mgmt->frame_control)) |
| 2385 | return RX_DROP_MONITOR; |
| 2386 | |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2387 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 2388 | ieee80211_is_beacon(mgmt->frame_control) && |
| 2389 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2390 | int sig = 0; |
| 2391 | |
| 2392 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
| 2393 | sig = status->signal; |
| 2394 | |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2395 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
| 2396 | rx->skb->data, rx->skb->len, |
Ben Greear | 37c73b5 | 2012-10-26 14:49:25 -0700 | [diff] [blame] | 2397 | status->freq, sig); |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2398 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
| 2399 | } |
| 2400 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2401 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2402 | return RX_DROP_MONITOR; |
| 2403 | |
| 2404 | if (ieee80211_drop_unencrypted_mgmt(rx)) |
| 2405 | return RX_DROP_UNUSABLE; |
| 2406 | |
| 2407 | return RX_CONTINUE; |
| 2408 | } |
| 2409 | |
| 2410 | static ieee80211_rx_result debug_noinline |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2411 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) |
| 2412 | { |
| 2413 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2414 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2415 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2416 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2417 | int len = rx->skb->len; |
| 2418 | |
| 2419 | if (!ieee80211_is_action(mgmt->frame_control)) |
| 2420 | return RX_CONTINUE; |
| 2421 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2422 | /* drop too small frames */ |
| 2423 | if (len < IEEE80211_MIN_ACTION_SIZE) |
| 2424 | return RX_DROP_UNUSABLE; |
| 2425 | |
Marco Porsch | 815b809 | 2012-12-05 15:04:26 -0800 | [diff] [blame] | 2426 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2427 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
| 2428 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2429 | return RX_DROP_UNUSABLE; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2430 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2431 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2432 | return RX_DROP_UNUSABLE; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2433 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2434 | switch (mgmt->u.action.category) { |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2435 | case WLAN_CATEGORY_HT: |
| 2436 | /* reject HT action frames from stations not supporting HT */ |
| 2437 | if (!rx->sta->sta.ht_cap.ht_supported) |
| 2438 | goto invalid; |
| 2439 | |
| 2440 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 2441 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
| 2442 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 2443 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2444 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 2445 | break; |
| 2446 | |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2447 | /* verify action & smps_control/chanwidth are present */ |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2448 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
| 2449 | goto invalid; |
| 2450 | |
| 2451 | switch (mgmt->u.action.u.ht_smps.action) { |
| 2452 | case WLAN_HT_ACTION_SMPS: { |
| 2453 | struct ieee80211_supported_band *sband; |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2454 | enum ieee80211_smps_mode smps_mode; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2455 | |
| 2456 | /* convert to HT capability */ |
| 2457 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
| 2458 | case WLAN_HT_SMPS_CONTROL_DISABLED: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2459 | smps_mode = IEEE80211_SMPS_OFF; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2460 | break; |
| 2461 | case WLAN_HT_SMPS_CONTROL_STATIC: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2462 | smps_mode = IEEE80211_SMPS_STATIC; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2463 | break; |
| 2464 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2465 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2466 | break; |
| 2467 | default: |
| 2468 | goto invalid; |
| 2469 | } |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2470 | |
| 2471 | /* if no change do nothing */ |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2472 | if (rx->sta->sta.smps_mode == smps_mode) |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2473 | goto handled; |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2474 | rx->sta->sta.smps_mode = smps_mode; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2475 | |
| 2476 | sband = rx->local->hw.wiphy->bands[status->band]; |
| 2477 | |
Johannes Berg | 64f68e5 | 2012-03-28 10:58:37 +0200 | [diff] [blame] | 2478 | rate_control_rate_update(local, sband, rx->sta, |
| 2479 | IEEE80211_RC_SMPS_CHANGED); |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2480 | goto handled; |
| 2481 | } |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2482 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
| 2483 | struct ieee80211_supported_band *sband; |
| 2484 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2485 | enum ieee80211_sta_rx_bandwidth new_bw; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2486 | |
| 2487 | /* If it doesn't support 40 MHz it can't change ... */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2488 | if (!(rx->sta->sta.ht_cap.cap & |
| 2489 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2490 | goto handled; |
| 2491 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2492 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
| 2493 | new_bw = IEEE80211_STA_RX_BW_20; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2494 | else |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2495 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); |
| 2496 | |
| 2497 | if (rx->sta->sta.bandwidth == new_bw) |
| 2498 | goto handled; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2499 | |
| 2500 | sband = rx->local->hw.wiphy->bands[status->band]; |
| 2501 | |
| 2502 | rate_control_rate_update(local, sband, rx->sta, |
| 2503 | IEEE80211_RC_BW_CHANGED); |
| 2504 | goto handled; |
| 2505 | } |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2506 | default: |
| 2507 | goto invalid; |
| 2508 | } |
| 2509 | |
| 2510 | break; |
Johannes Berg | 1b3a2e4 | 2013-03-26 15:17:18 +0100 | [diff] [blame] | 2511 | case WLAN_CATEGORY_PUBLIC: |
| 2512 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2513 | goto invalid; |
| 2514 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2515 | break; |
| 2516 | if (!rx->sta) |
| 2517 | break; |
| 2518 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) |
| 2519 | break; |
| 2520 | if (mgmt->u.action.u.ext_chan_switch.action_code != |
| 2521 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) |
| 2522 | break; |
| 2523 | if (len < offsetof(struct ieee80211_mgmt, |
| 2524 | u.action.u.ext_chan_switch.variable)) |
| 2525 | goto invalid; |
| 2526 | goto queue; |
Johannes Berg | 0af83d3 | 2012-12-27 18:55:36 +0100 | [diff] [blame] | 2527 | case WLAN_CATEGORY_VHT: |
| 2528 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 2529 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
| 2530 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 2531 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2532 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 2533 | break; |
| 2534 | |
| 2535 | /* verify action code is present */ |
| 2536 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2537 | goto invalid; |
| 2538 | |
| 2539 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { |
| 2540 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { |
| 2541 | u8 opmode; |
| 2542 | |
| 2543 | /* verify opmode is present */ |
| 2544 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
| 2545 | goto invalid; |
| 2546 | |
| 2547 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; |
| 2548 | |
| 2549 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, |
Johannes Berg | bee7f58 | 2013-02-07 22:24:55 +0100 | [diff] [blame] | 2550 | opmode, status->band, |
| 2551 | false); |
Johannes Berg | 0af83d3 | 2012-12-27 18:55:36 +0100 | [diff] [blame] | 2552 | goto handled; |
| 2553 | } |
| 2554 | default: |
| 2555 | break; |
| 2556 | } |
| 2557 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2558 | case WLAN_CATEGORY_BACK: |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2559 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 2560 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2561 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 2562 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2563 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2564 | break; |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2565 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2566 | /* verify action_code is present */ |
| 2567 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2568 | break; |
| 2569 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2570 | switch (mgmt->u.action.u.addba_req.action_code) { |
| 2571 | case WLAN_ACTION_ADDBA_REQ: |
| 2572 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2573 | sizeof(mgmt->u.action.u.addba_req))) |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2574 | goto invalid; |
| 2575 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2576 | case WLAN_ACTION_ADDBA_RESP: |
| 2577 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2578 | sizeof(mgmt->u.action.u.addba_resp))) |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2579 | goto invalid; |
| 2580 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2581 | case WLAN_ACTION_DELBA: |
| 2582 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2583 | sizeof(mgmt->u.action.u.delba))) |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2584 | goto invalid; |
| 2585 | break; |
| 2586 | default: |
| 2587 | goto invalid; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2588 | } |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2589 | |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2590 | goto queue; |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2591 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2592 | /* verify action_code is present */ |
| 2593 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2594 | break; |
| 2595 | |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2596 | switch (mgmt->u.action.u.measurement.action_code) { |
| 2597 | case WLAN_ACTION_SPCT_MSR_REQ: |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2598 | if (status->band != IEEE80211_BAND_5GHZ) |
| 2599 | break; |
| 2600 | |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2601 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2602 | sizeof(mgmt->u.action.u.measurement))) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2603 | break; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2604 | |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 2605 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2606 | break; |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 2607 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2608 | ieee80211_process_measurement_req(sdata, mgmt, len); |
| 2609 | goto handled; |
| 2610 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
| 2611 | u8 *bssid; |
| 2612 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2613 | sizeof(mgmt->u.action.u.chan_switch))) |
| 2614 | break; |
| 2615 | |
| 2616 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 2617 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2618 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2619 | break; |
| 2620 | |
| 2621 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 2622 | bssid = sdata->u.mgd.bssid; |
| 2623 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 2624 | bssid = sdata->u.ibss.bssid; |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 2625 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
| 2626 | bssid = mgmt->sa; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2627 | else |
| 2628 | break; |
| 2629 | |
| 2630 | if (!ether_addr_equal(mgmt->bssid, bssid)) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2631 | break; |
Sujith | c481ec9 | 2009-01-06 09:28:37 +0530 | [diff] [blame] | 2632 | |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2633 | goto queue; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2634 | } |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2635 | } |
| 2636 | break; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2637 | case WLAN_CATEGORY_SA_QUERY: |
| 2638 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2639 | sizeof(mgmt->u.action.u.sa_query))) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2640 | break; |
| 2641 | |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2642 | switch (mgmt->u.action.u.sa_query.action) { |
| 2643 | case WLAN_ACTION_SA_QUERY_REQUEST: |
| 2644 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2645 | break; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2646 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2647 | goto handled; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2648 | } |
| 2649 | break; |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2650 | case WLAN_CATEGORY_SELF_PROTECTED: |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2651 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2652 | sizeof(mgmt->u.action.u.self_prot.action_code))) |
| 2653 | break; |
| 2654 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2655 | switch (mgmt->u.action.u.self_prot.action_code) { |
| 2656 | case WLAN_SP_MESH_PEERING_OPEN: |
| 2657 | case WLAN_SP_MESH_PEERING_CLOSE: |
| 2658 | case WLAN_SP_MESH_PEERING_CONFIRM: |
| 2659 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2660 | goto invalid; |
Thomas Pedersen | a6dad6a | 2013-03-04 13:06:12 -0800 | [diff] [blame] | 2661 | if (sdata->u.mesh.user_mpm) |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2662 | /* userspace handles this frame */ |
| 2663 | break; |
| 2664 | goto queue; |
| 2665 | case WLAN_SP_MGK_INFORM: |
| 2666 | case WLAN_SP_MGK_ACK: |
| 2667 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2668 | goto invalid; |
| 2669 | break; |
| 2670 | } |
| 2671 | break; |
Javier Cardona | d3aaec8a | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 2672 | case WLAN_CATEGORY_MESH_ACTION: |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2673 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2674 | sizeof(mgmt->u.action.u.mesh_action.action_code))) |
| 2675 | break; |
| 2676 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2677 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2678 | break; |
Thomas Pedersen | 25d49e4 | 2011-08-11 19:35:15 -0700 | [diff] [blame] | 2679 | if (mesh_action_is_path_sel(mgmt) && |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 2680 | !mesh_path_sel_is_hwmp(sdata)) |
Javier Cardona | c7108a7 | 2010-12-16 17:37:50 -0800 | [diff] [blame] | 2681 | break; |
| 2682 | goto queue; |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2683 | } |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2684 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2685 | return RX_CONTINUE; |
| 2686 | |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2687 | invalid: |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2688 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2689 | /* will return in the next handlers */ |
| 2690 | return RX_CONTINUE; |
| 2691 | |
| 2692 | handled: |
| 2693 | if (rx->sta) |
| 2694 | rx->sta->rx_packets++; |
| 2695 | dev_kfree_skb(rx->skb); |
| 2696 | return RX_QUEUED; |
| 2697 | |
| 2698 | queue: |
| 2699 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
| 2700 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
| 2701 | ieee80211_queue_work(&local->hw, &sdata->work); |
| 2702 | if (rx->sta) |
| 2703 | rx->sta->rx_packets++; |
| 2704 | return RX_QUEUED; |
| 2705 | } |
| 2706 | |
| 2707 | static ieee80211_rx_result debug_noinline |
| 2708 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) |
| 2709 | { |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2710 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2711 | int sig = 0; |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2712 | |
| 2713 | /* skip known-bad action frames and return them in the next handler */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2714 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2715 | return RX_CONTINUE; |
Felix Fietkau | d790744 | 2010-01-07 20:23:53 +0100 | [diff] [blame] | 2716 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2717 | /* |
| 2718 | * Getting here means the kernel doesn't know how to handle |
| 2719 | * it, but maybe userspace does ... include returned frames |
| 2720 | * so userspace can register for those to know whether ones |
| 2721 | * it transmitted were processed or returned. |
| 2722 | */ |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2723 | |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2724 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
| 2725 | sig = status->signal; |
| 2726 | |
Johannes Berg | 71bbc99 | 2012-06-15 15:30:18 +0200 | [diff] [blame] | 2727 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
Vladimir Kondratiev | 970fdfa | 2014-08-11 03:29:57 -0700 | [diff] [blame] | 2728 | rx->skb->data, rx->skb->len, 0)) { |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2729 | if (rx->sta) |
| 2730 | rx->sta->rx_packets++; |
| 2731 | dev_kfree_skb(rx->skb); |
| 2732 | return RX_QUEUED; |
| 2733 | } |
| 2734 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2735 | return RX_CONTINUE; |
| 2736 | } |
| 2737 | |
| 2738 | static ieee80211_rx_result debug_noinline |
| 2739 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) |
| 2740 | { |
| 2741 | struct ieee80211_local *local = rx->local; |
| 2742 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
| 2743 | struct sk_buff *nskb; |
| 2744 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2745 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2746 | |
| 2747 | if (!ieee80211_is_action(mgmt->frame_control)) |
| 2748 | return RX_CONTINUE; |
| 2749 | |
| 2750 | /* |
| 2751 | * For AP mode, hostapd is responsible for handling any action |
| 2752 | * frames that we didn't handle, including returning unknown |
| 2753 | * ones. For all other modes we will return them to the sender, |
| 2754 | * setting the 0x80 bit in the action category, as required by |
Johannes Berg | 4b5ebcc | 2012-06-27 15:38:56 +0200 | [diff] [blame] | 2755 | * 802.11-2012 9.24.4. |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2756 | * Newer versions of hostapd shall also use the management frame |
| 2757 | * registration mechanisms, but older ones still use cooked |
| 2758 | * monitor interfaces so push all frames there. |
| 2759 | */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2760 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2761 | (sdata->vif.type == NL80211_IFTYPE_AP || |
| 2762 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
| 2763 | return RX_DROP_MONITOR; |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2764 | |
Johannes Berg | 4b5ebcc | 2012-06-27 15:38:56 +0200 | [diff] [blame] | 2765 | if (is_multicast_ether_addr(mgmt->da)) |
| 2766 | return RX_DROP_MONITOR; |
| 2767 | |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2768 | /* do not return rejected action frames */ |
| 2769 | if (mgmt->u.action.category & 0x80) |
| 2770 | return RX_DROP_UNUSABLE; |
| 2771 | |
| 2772 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, |
| 2773 | GFP_ATOMIC); |
| 2774 | if (nskb) { |
John W. Linville | 292b4df | 2010-06-24 11:13:56 -0400 | [diff] [blame] | 2775 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2776 | |
John W. Linville | 292b4df | 2010-06-24 11:13:56 -0400 | [diff] [blame] | 2777 | nmgmt->u.action.category |= 0x80; |
| 2778 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); |
| 2779 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2780 | |
| 2781 | memset(nskb->cb, 0, sizeof(nskb->cb)); |
| 2782 | |
Johannes Berg | 07e5a5f | 2013-03-07 13:22:05 +0100 | [diff] [blame] | 2783 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
| 2784 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); |
| 2785 | |
| 2786 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | |
| 2787 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | |
| 2788 | IEEE80211_TX_CTL_NO_CCK_RATE; |
| 2789 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
| 2790 | info->hw_queue = |
| 2791 | local->hw.offchannel_tx_hw_queue; |
| 2792 | } |
| 2793 | |
| 2794 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, |
| 2795 | status->band); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2796 | } |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2797 | dev_kfree_skb(rx->skb); |
| 2798 | return RX_QUEUED; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2799 | } |
| 2800 | |
| 2801 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2802 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2803 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2804 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2805 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
| 2806 | __le16 stype; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2807 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2808 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 2809 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2810 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
| 2811 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2812 | sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2813 | return RX_DROP_MONITOR; |
Johannes Berg | f9d540e | 2007-09-28 14:02:09 +0200 | [diff] [blame] | 2814 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2815 | switch (stype) { |
Johannes Berg | 66e67e4 | 2012-01-20 13:55:27 +0100 | [diff] [blame] | 2816 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2817 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
| 2818 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): |
| 2819 | /* process for all: mesh, mlme, ibss */ |
| 2820 | break; |
Johannes Berg | 66e67e4 | 2012-01-20 13:55:27 +0100 | [diff] [blame] | 2821 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
| 2822 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2823 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
| 2824 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): |
Christian Lamparter | 2c31333 | 2010-11-29 20:53:23 +0100 | [diff] [blame] | 2825 | if (is_multicast_ether_addr(mgmt->da) && |
| 2826 | !is_broadcast_ether_addr(mgmt->da)) |
| 2827 | return RX_DROP_MONITOR; |
| 2828 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2829 | /* process only for station */ |
| 2830 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2831 | return RX_DROP_MONITOR; |
| 2832 | break; |
| 2833 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): |
Thomas Pedersen | 9fb04b5 | 2013-02-14 11:20:14 -0800 | [diff] [blame] | 2834 | /* process only for ibss and mesh */ |
| 2835 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2836 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2837 | return RX_DROP_MONITOR; |
| 2838 | break; |
| 2839 | default: |
| 2840 | return RX_DROP_MONITOR; |
| 2841 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2842 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2843 | /* queue up frame and kick off work to process it */ |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 2844 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2845 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
| 2846 | ieee80211_queue_work(&rx->local->hw, &sdata->work); |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2847 | if (rx->sta) |
| 2848 | rx->sta->rx_packets++; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2849 | |
| 2850 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2851 | } |
| 2852 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2853 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
Johannes Berg | 5f0b7de | 2009-11-16 13:58:21 +0100 | [diff] [blame] | 2854 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
| 2855 | struct ieee80211_rate *rate) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2856 | { |
| 2857 | struct ieee80211_sub_if_data *sdata; |
| 2858 | struct ieee80211_local *local = rx->local; |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2859 | struct sk_buff *skb = rx->skb, *skb2; |
| 2860 | struct net_device *prev_dev = NULL; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2861 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2862 | int needed_headroom; |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2863 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2864 | /* |
| 2865 | * If cooked monitor has been processed already, then |
| 2866 | * don't do it again. If not, set the flag. |
| 2867 | */ |
| 2868 | if (rx->flags & IEEE80211_RX_CMNTR) |
John W. Linville | 7c1e183 | 2010-09-24 15:52:49 -0400 | [diff] [blame] | 2869 | goto out_free_skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2870 | rx->flags |= IEEE80211_RX_CMNTR; |
John W. Linville | 7c1e183 | 2010-09-24 15:52:49 -0400 | [diff] [blame] | 2871 | |
Johannes Berg | 152c477 | 2011-10-21 10:22:22 +0200 | [diff] [blame] | 2872 | /* If there are no cooked monitor interfaces, just free the SKB */ |
| 2873 | if (!local->cooked_mntrs) |
| 2874 | goto out_free_skb; |
| 2875 | |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2876 | /* room for the radiotap header based on driver features */ |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 2877 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2878 | |
| 2879 | if (skb_headroom(skb) < needed_headroom && |
| 2880 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2881 | goto out_free_skb; |
| 2882 | |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2883 | /* prepend radiotap information */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 2884 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
| 2885 | false); |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2886 | |
| 2887 | skb_set_mac_header(skb, 0); |
| 2888 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 2889 | skb->pkt_type = PACKET_OTHERHOST; |
| 2890 | skb->protocol = htons(ETH_P_802_2); |
| 2891 | |
| 2892 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 2893 | if (!ieee80211_sdata_running(sdata)) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2894 | continue; |
| 2895 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2896 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2897 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
| 2898 | continue; |
| 2899 | |
| 2900 | if (prev_dev) { |
| 2901 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 2902 | if (skb2) { |
| 2903 | skb2->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 2904 | netif_receive_skb(skb2); |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2905 | } |
| 2906 | } |
| 2907 | |
| 2908 | prev_dev = sdata->dev; |
| 2909 | sdata->dev->stats.rx_packets++; |
| 2910 | sdata->dev->stats.rx_bytes += skb->len; |
| 2911 | } |
| 2912 | |
| 2913 | if (prev_dev) { |
| 2914 | skb->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 2915 | netif_receive_skb(skb); |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2916 | return; |
| 2917 | } |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2918 | |
| 2919 | out_free_skb: |
| 2920 | dev_kfree_skb(skb); |
| 2921 | } |
| 2922 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2923 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
| 2924 | ieee80211_rx_result res) |
| 2925 | { |
| 2926 | switch (res) { |
| 2927 | case RX_DROP_MONITOR: |
| 2928 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); |
| 2929 | if (rx->sta) |
| 2930 | rx->sta->rx_dropped++; |
| 2931 | /* fall through */ |
| 2932 | case RX_CONTINUE: { |
| 2933 | struct ieee80211_rate *rate = NULL; |
| 2934 | struct ieee80211_supported_band *sband; |
| 2935 | struct ieee80211_rx_status *status; |
| 2936 | |
| 2937 | status = IEEE80211_SKB_RXCB((rx->skb)); |
| 2938 | |
| 2939 | sband = rx->local->hw.wiphy->bands[status->band]; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 2940 | if (!(status->flag & RX_FLAG_HT) && |
| 2941 | !(status->flag & RX_FLAG_VHT)) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2942 | rate = &sband->bitrates[status->rate_idx]; |
| 2943 | |
| 2944 | ieee80211_rx_cooked_monitor(rx, rate); |
| 2945 | break; |
| 2946 | } |
| 2947 | case RX_DROP_UNUSABLE: |
| 2948 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); |
| 2949 | if (rx->sta) |
| 2950 | rx->sta->rx_dropped++; |
| 2951 | dev_kfree_skb(rx->skb); |
| 2952 | break; |
| 2953 | case RX_QUEUED: |
| 2954 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); |
| 2955 | break; |
| 2956 | } |
| 2957 | } |
| 2958 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2959 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
| 2960 | struct sk_buff_head *frames) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2961 | { |
| 2962 | ieee80211_rx_result res = RX_DROP_MONITOR; |
| 2963 | struct sk_buff *skb; |
| 2964 | |
| 2965 | #define CALL_RXH(rxh) \ |
| 2966 | do { \ |
| 2967 | res = rxh(rx); \ |
| 2968 | if (res != RX_CONTINUE) \ |
| 2969 | goto rxh_next; \ |
| 2970 | } while (0); |
| 2971 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2972 | spin_lock_bh(&rx->local->rx_path_lock); |
Christian Lamparter | 24a8fda | 2010-12-30 17:25:29 +0100 | [diff] [blame] | 2973 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2974 | while ((skb = __skb_dequeue(frames))) { |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2975 | /* |
| 2976 | * all the other fields are valid across frames |
| 2977 | * that belong to an aMPDU since they are on the |
| 2978 | * same TID from the same station |
| 2979 | */ |
| 2980 | rx->skb = skb; |
| 2981 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2982 | CALL_RXH(ieee80211_rx_h_check_more_data) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 2983 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2984 | CALL_RXH(ieee80211_rx_h_sta_process) |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 2985 | CALL_RXH(ieee80211_rx_h_decrypt) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2986 | CALL_RXH(ieee80211_rx_h_defragment) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2987 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
| 2988 | /* must be after MMIC verify so header is counted in MPDU mic */ |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2989 | #ifdef CONFIG_MAC80211_MESH |
| 2990 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
| 2991 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
| 2992 | #endif |
Javier Cardona | 2154c81 | 2011-09-07 17:49:53 -0700 | [diff] [blame] | 2993 | CALL_RXH(ieee80211_rx_h_amsdu) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2994 | CALL_RXH(ieee80211_rx_h_data) |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2995 | |
| 2996 | /* special treatment -- needs the queue */ |
| 2997 | res = ieee80211_rx_h_ctrl(rx, frames); |
| 2998 | if (res != RX_CONTINUE) |
| 2999 | goto rxh_next; |
| 3000 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 3001 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3002 | CALL_RXH(ieee80211_rx_h_action) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 3003 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
| 3004 | CALL_RXH(ieee80211_rx_h_action_return) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3005 | CALL_RXH(ieee80211_rx_h_mgmt) |
| 3006 | |
| 3007 | rxh_next: |
| 3008 | ieee80211_rx_handlers_result(rx, res); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3009 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3010 | #undef CALL_RXH |
| 3011 | } |
Christian Lamparter | 24a8fda | 2010-12-30 17:25:29 +0100 | [diff] [blame] | 3012 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3013 | spin_unlock_bh(&rx->local->rx_path_lock); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3014 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3015 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3016 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3017 | { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3018 | struct sk_buff_head reorder_release; |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3019 | ieee80211_rx_result res = RX_DROP_MONITOR; |
| 3020 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3021 | __skb_queue_head_init(&reorder_release); |
| 3022 | |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 3023 | #define CALL_RXH(rxh) \ |
| 3024 | do { \ |
| 3025 | res = rxh(rx); \ |
| 3026 | if (res != RX_CONTINUE) \ |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3027 | goto rxh_next; \ |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 3028 | } while (0); |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3029 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 3030 | CALL_RXH(ieee80211_rx_h_check) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3031 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3032 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3033 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3034 | ieee80211_rx_handlers(rx, &reorder_release); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3035 | return; |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 3036 | |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3037 | rxh_next: |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3038 | ieee80211_rx_handlers_result(rx, res); |
| 3039 | |
| 3040 | #undef CALL_RXH |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3041 | } |
| 3042 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3043 | /* |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 3044 | * This function makes calls into the RX path, therefore |
| 3045 | * it has to be invoked under RCU read lock. |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3046 | */ |
| 3047 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) |
| 3048 | { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3049 | struct sk_buff_head frames; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3050 | struct ieee80211_rx_data rx = { |
| 3051 | .sta = sta, |
| 3052 | .sdata = sta->sdata, |
| 3053 | .local = sta->local, |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 3054 | /* This is OK -- must be QoS data frame */ |
| 3055 | .security_idx = tid, |
| 3056 | .seqno_idx = tid, |
Helmut Schaa | fcf8bd3 | 2011-04-01 15:46:05 +0200 | [diff] [blame] | 3057 | .flags = 0, |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3058 | }; |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3059 | struct tid_ampdu_rx *tid_agg_rx; |
| 3060 | |
| 3061 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
| 3062 | if (!tid_agg_rx) |
| 3063 | return; |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3064 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3065 | __skb_queue_head_init(&frames); |
| 3066 | |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3067 | spin_lock(&tid_agg_rx->reorder_lock); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3068 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3069 | spin_unlock(&tid_agg_rx->reorder_lock); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3070 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3071 | ieee80211_rx_handlers(&rx, &frames); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3072 | } |
| 3073 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3074 | /* main receive path */ |
| 3075 | |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3076 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
| 3077 | struct ieee80211_hdr *hdr) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3078 | { |
Johannes Berg | 20b01f8 | 2010-09-24 11:21:05 +0200 | [diff] [blame] | 3079 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 3080 | struct sk_buff *skb = rx->skb; |
| 3081 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 3082 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3083 | int multicast = is_multicast_ether_addr(hdr->addr1); |
| 3084 | |
Johannes Berg | 51fb61e | 2007-12-19 01:31:27 +0100 | [diff] [blame] | 3085 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3086 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 3087 | if (!bssid && !sdata->u.mgd.use_4addr) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3088 | return false; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 3089 | if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3090 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Felix Fietkau | 4f31233 | 2011-02-05 23:48:37 +0100 | [diff] [blame] | 3091 | if (!(sdata->dev->flags & IFF_PROMISC) || |
| 3092 | sdata->u.mgd.use_4addr) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3093 | return false; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3094 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3095 | } |
| 3096 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3097 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3098 | if (!bssid) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3099 | return false; |
Felix Fietkau | 6329b8d | 2013-09-17 11:15:43 +0200 | [diff] [blame] | 3100 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
| 3101 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3102 | return false; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 3103 | if (ieee80211_is_beacon(hdr->frame_control)) { |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3104 | return true; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3105 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3106 | return false; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3107 | } else if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3108 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Johannes Berg | 4150c57 | 2007-09-17 01:29:23 -0400 | [diff] [blame] | 3109 | if (!(sdata->dev->flags & IFF_PROMISC)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3110 | return false; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3111 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3112 | } else if (!rx->sta) { |
| 3113 | int rate_idx; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 3114 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
| 3115 | rate_idx = 0; /* TODO: HT/VHT rates */ |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3116 | else |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 3117 | rate_idx = status->rate_idx; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 3118 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
| 3119 | BIT(rate_idx)); |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3120 | } |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3121 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3122 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3123 | if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3124 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3125 | if (!(sdata->dev->flags & IFF_PROMISC)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3126 | return false; |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3127 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3128 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3129 | } |
| 3130 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3131 | case NL80211_IFTYPE_AP_VLAN: |
| 3132 | case NL80211_IFTYPE_AP: |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3133 | if (!bssid) { |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3134 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3135 | return false; |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3136 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
Johannes Berg | 3df6eae | 2011-12-06 10:39:40 +0100 | [diff] [blame] | 3137 | /* |
| 3138 | * Accept public action frames even when the |
| 3139 | * BSSID doesn't match, this is used for P2P |
| 3140 | * and location updates. Note that mac80211 |
| 3141 | * itself never looks at these frames. |
| 3142 | */ |
Johannes Berg | 2b9ccd4 | 2013-05-13 16:42:40 +0200 | [diff] [blame] | 3143 | if (!multicast && |
| 3144 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3145 | return false; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3146 | if (ieee80211_is_public_action(hdr, skb->len)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3147 | return true; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3148 | if (!ieee80211_is_beacon(hdr->frame_control)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3149 | return false; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3150 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Arik Nemtsov | db8e173 | 2014-07-17 17:14:30 +0300 | [diff] [blame] | 3151 | } else if (!ieee80211_has_tods(hdr->frame_control)) { |
| 3152 | /* ignore data frames to TDLS-peers */ |
| 3153 | if (ieee80211_is_data(hdr->frame_control)) |
| 3154 | return false; |
| 3155 | /* ignore action frames to TDLS-peers */ |
| 3156 | if (ieee80211_is_action(hdr->frame_control) && |
| 3157 | !ether_addr_equal(bssid, hdr->addr1)) |
| 3158 | return false; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3159 | } |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3160 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3161 | case NL80211_IFTYPE_WDS: |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 3162 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3163 | return false; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3164 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3165 | return false; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3166 | break; |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3167 | case NL80211_IFTYPE_P2P_DEVICE: |
| 3168 | if (!ieee80211_is_public_action(hdr, skb->len) && |
| 3169 | !ieee80211_is_probe_req(hdr->frame_control) && |
| 3170 | !ieee80211_is_probe_resp(hdr->frame_control) && |
| 3171 | !ieee80211_is_beacon(hdr->frame_control)) |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3172 | return false; |
Johannes Berg | 1b737f8 | 2013-04-18 23:42:19 +0200 | [diff] [blame] | 3173 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
| 3174 | !multicast) |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3175 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
| 3176 | break; |
Johannes Berg | 2ca27bc | 2010-09-16 14:58:23 +0200 | [diff] [blame] | 3177 | default: |
Johannes Berg | fb1c1cd | 2007-09-26 15:19:43 +0200 | [diff] [blame] | 3178 | /* should never get here */ |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3179 | WARN_ON_ONCE(1); |
Johannes Berg | fb1c1cd | 2007-09-26 15:19:43 +0200 | [diff] [blame] | 3180 | break; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3181 | } |
| 3182 | |
Johannes Berg | 3c2723f5 | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3183 | return true; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3184 | } |
| 3185 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3186 | /* |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3187 | * This function returns whether or not the SKB |
| 3188 | * was destined for RX processing or not, which, |
| 3189 | * if consume is true, is equivalent to whether |
| 3190 | * or not the skb was consumed. |
| 3191 | */ |
| 3192 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, |
| 3193 | struct sk_buff *skb, bool consume) |
| 3194 | { |
| 3195 | struct ieee80211_local *local = rx->local; |
| 3196 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 3197 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 3198 | struct ieee80211_hdr *hdr = (void *)skb->data; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3199 | |
| 3200 | rx->skb = skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3201 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3202 | |
Emmanuel Grumbach | 4079194 | 2014-01-07 13:10:20 +0200 | [diff] [blame] | 3203 | if (!prepare_for_handlers(rx, hdr)) |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3204 | return false; |
| 3205 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3206 | if (!consume) { |
| 3207 | skb = skb_copy(skb, GFP_ATOMIC); |
| 3208 | if (!skb) { |
| 3209 | if (net_ratelimit()) |
| 3210 | wiphy_debug(local->hw.wiphy, |
Ben Greear | b305dae | 2011-01-08 10:30:54 -0800 | [diff] [blame] | 3211 | "failed to copy skb for %s\n", |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3212 | sdata->name); |
| 3213 | return true; |
| 3214 | } |
| 3215 | |
| 3216 | rx->skb = skb; |
| 3217 | } |
| 3218 | |
| 3219 | ieee80211_invoke_rx_handlers(rx); |
| 3220 | return true; |
| 3221 | } |
| 3222 | |
| 3223 | /* |
Zhao, Gang | 6b59db7 | 2014-04-21 12:52:59 +0800 | [diff] [blame] | 3224 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3225 | * be called with rcu_read_lock protection. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3226 | */ |
Ron Rindjunsky | 71ebb4a | 2008-01-21 12:39:12 +0200 | [diff] [blame] | 3227 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 3228 | struct sk_buff *skb) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3229 | { |
| 3230 | struct ieee80211_local *local = hw_to_local(hw); |
| 3231 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3232 | struct ieee80211_hdr *hdr; |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3233 | __le16 fc; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 3234 | struct ieee80211_rx_data rx; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3235 | struct ieee80211_sub_if_data *prev; |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3236 | struct sta_info *sta, *tmp, *prev_sta; |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3237 | int err = 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3238 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3239 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3240 | memset(&rx, 0, sizeof(rx)); |
| 3241 | rx.skb = skb; |
| 3242 | rx.local = local; |
Johannes Berg | 72abd81 | 2007-09-17 01:29:22 -0400 | [diff] [blame] | 3243 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3244 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3245 | local->dot11ReceivedFragmentCount++; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3246 | |
Johannes Berg | 4a4f1a5 | 2012-10-26 00:33:36 +0200 | [diff] [blame] | 3247 | if (ieee80211_is_mgmt(fc)) { |
| 3248 | /* drop frame if too short for header */ |
| 3249 | if (skb->len < ieee80211_hdrlen(fc)) |
| 3250 | err = -ENOBUFS; |
| 3251 | else |
| 3252 | err = skb_linearize(skb); |
| 3253 | } else { |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3254 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
Johannes Berg | 4a4f1a5 | 2012-10-26 00:33:36 +0200 | [diff] [blame] | 3255 | } |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3256 | |
| 3257 | if (err) { |
| 3258 | dev_kfree_skb(skb); |
| 3259 | return; |
| 3260 | } |
| 3261 | |
| 3262 | hdr = (struct ieee80211_hdr *)skb->data; |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 3263 | ieee80211_parse_qos(&rx); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 3264 | ieee80211_verify_alignment(&rx); |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 3265 | |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3266 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
| 3267 | ieee80211_is_beacon(hdr->frame_control))) |
| 3268 | ieee80211_scan_rx(local, skb); |
| 3269 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3270 | if (ieee80211_is_data(fc)) { |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3271 | prev_sta = NULL; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3272 | |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3273 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3274 | if (!prev_sta) { |
| 3275 | prev_sta = sta; |
| 3276 | continue; |
| 3277 | } |
| 3278 | |
| 3279 | rx.sta = prev_sta; |
| 3280 | rx.sdata = prev_sta->sdata; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3281 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3282 | |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3283 | prev_sta = sta; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3284 | } |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3285 | |
| 3286 | if (prev_sta) { |
| 3287 | rx.sta = prev_sta; |
| 3288 | rx.sdata = prev_sta->sdata; |
| 3289 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3290 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3291 | return; |
Senthil Balasubramanian | 8e26d5a | 2010-11-30 20:15:38 +0530 | [diff] [blame] | 3292 | goto out; |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3293 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3294 | } |
| 3295 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3296 | prev = NULL; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3297 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3298 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 3299 | if (!ieee80211_sdata_running(sdata)) |
| 3300 | continue; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 3301 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3302 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| 3303 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 3304 | continue; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 3305 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3306 | /* |
| 3307 | * frame is destined for this interface, but if it's |
| 3308 | * not also for the previous one we handle that after |
| 3309 | * the loop to avoid copying the SKB once too much |
| 3310 | */ |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 3311 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3312 | if (!prev) { |
Johannes Berg | 340e11f | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3313 | prev = sdata; |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3314 | continue; |
Johannes Berg | 8e6f0032 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3315 | } |
Felix Fietkau | 4bb29f8 | 2010-01-22 00:36:39 +0100 | [diff] [blame] | 3316 | |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3317 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3318 | rx.sdata = prev; |
| 3319 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
Felix Fietkau | 4bb29f8 | 2010-01-22 00:36:39 +0100 | [diff] [blame] | 3320 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3321 | prev = sdata; |
| 3322 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3323 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3324 | if (prev) { |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3325 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3326 | rx.sdata = prev; |
| 3327 | |
| 3328 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
| 3329 | return; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3330 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3331 | |
Senthil Balasubramanian | 8e26d5a | 2010-11-30 20:15:38 +0530 | [diff] [blame] | 3332 | out: |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3333 | dev_kfree_skb(skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3334 | } |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3335 | |
| 3336 | /* |
| 3337 | * This is the receive path handler. It is called by a low level driver when an |
| 3338 | * 802.11 MPDU is received from the hardware. |
| 3339 | */ |
John W. Linville | 103bf9f | 2009-08-20 16:34:15 -0400 | [diff] [blame] | 3340 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3341 | { |
| 3342 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3343 | struct ieee80211_rate *rate = NULL; |
| 3344 | struct ieee80211_supported_band *sband; |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3345 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3346 | |
Johannes Berg | d20ef63 | 2009-10-11 15:10:40 +0200 | [diff] [blame] | 3347 | WARN_ON_ONCE(softirq_count() == 0); |
| 3348 | |
Johannes Berg | 444e3803 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3349 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3350 | goto drop; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3351 | |
| 3352 | sband = local->hw.wiphy->bands[status->band]; |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3353 | if (WARN_ON(!sband)) |
| 3354 | goto drop; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3355 | |
Johannes Berg | 89c3a8a | 2009-07-28 18:10:17 +0200 | [diff] [blame] | 3356 | /* |
| 3357 | * If we're suspending, it is possible although not too likely |
| 3358 | * that we'd be receiving frames after having already partially |
| 3359 | * quiesced the stack. We can't process such frames then since |
| 3360 | * that might, for example, cause stations to be added or other |
| 3361 | * driver callbacks be invoked. |
| 3362 | */ |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3363 | if (unlikely(local->quiescing || local->suspended)) |
| 3364 | goto drop; |
Johannes Berg | 89c3a8a | 2009-07-28 18:10:17 +0200 | [diff] [blame] | 3365 | |
Arik Nemtsov | 04800ad | 2012-06-06 11:25:02 +0300 | [diff] [blame] | 3366 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
| 3367 | if (unlikely(local->in_reconfig)) |
| 3368 | goto drop; |
| 3369 | |
Johannes Berg | ea77f12 | 2009-08-21 14:44:45 +0200 | [diff] [blame] | 3370 | /* |
| 3371 | * The same happens when we're not even started, |
| 3372 | * but that's worth a warning. |
| 3373 | */ |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3374 | if (WARN_ON(!local->started)) |
| 3375 | goto drop; |
Johannes Berg | ea77f12 | 2009-08-21 14:44:45 +0200 | [diff] [blame] | 3376 | |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3377 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
Luis R. Rodriguez | e5d6eb8 | 2009-11-09 16:03:22 -0500 | [diff] [blame] | 3378 | /* |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3379 | * Validate the rate, unless a PLCP error means that |
| 3380 | * we probably can't have a valid rate here anyway. |
Luis R. Rodriguez | e5d6eb8 | 2009-11-09 16:03:22 -0500 | [diff] [blame] | 3381 | */ |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3382 | |
| 3383 | if (status->flag & RX_FLAG_HT) { |
| 3384 | /* |
| 3385 | * rate_idx is MCS index, which can be [0-76] |
| 3386 | * as documented on: |
| 3387 | * |
| 3388 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n |
| 3389 | * |
| 3390 | * Anything else would be some sort of driver or |
| 3391 | * hardware error. The driver should catch hardware |
| 3392 | * errors. |
| 3393 | */ |
Johannes Berg | 444e3803 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3394 | if (WARN(status->rate_idx > 76, |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3395 | "Rate marked as an HT rate but passed " |
| 3396 | "status->rate_idx is not " |
| 3397 | "an MCS index [0-76]: %d (0x%02x)\n", |
| 3398 | status->rate_idx, |
| 3399 | status->rate_idx)) |
| 3400 | goto drop; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 3401 | } else if (status->flag & RX_FLAG_VHT) { |
| 3402 | if (WARN_ONCE(status->rate_idx > 9 || |
| 3403 | !status->vht_nss || |
| 3404 | status->vht_nss > 8, |
| 3405 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", |
| 3406 | status->rate_idx, status->vht_nss)) |
| 3407 | goto drop; |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3408 | } else { |
Johannes Berg | 444e3803 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3409 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3410 | goto drop; |
| 3411 | rate = &sband->bitrates[status->rate_idx]; |
| 3412 | } |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3413 | } |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3414 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3415 | status->rx_flags = 0; |
| 3416 | |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3417 | /* |
| 3418 | * key references and virtual interfaces are protected using RCU |
| 3419 | * and this requires that we are in a read-side RCU section during |
| 3420 | * receive processing |
| 3421 | */ |
| 3422 | rcu_read_lock(); |
| 3423 | |
| 3424 | /* |
| 3425 | * Frames with failed FCS/PLCP checksum are not returned, |
| 3426 | * all other frames are returned without radiotap header |
| 3427 | * if it was previously present. |
| 3428 | * Also, frames with less than 16 bytes are dropped. |
| 3429 | */ |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3430 | skb = ieee80211_rx_monitor(local, skb, rate); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3431 | if (!skb) { |
| 3432 | rcu_read_unlock(); |
| 3433 | return; |
| 3434 | } |
| 3435 | |
Johannes Berg | e1e5406 | 2010-11-30 08:58:45 +0100 | [diff] [blame] | 3436 | ieee80211_tpt_led_trig_rx(local, |
| 3437 | ((struct ieee80211_hdr *)skb->data)->frame_control, |
| 3438 | skb->len); |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 3439 | __ieee80211_rx_handle_packet(hw, skb); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3440 | |
| 3441 | rcu_read_unlock(); |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3442 | |
| 3443 | return; |
| 3444 | drop: |
| 3445 | kfree_skb(skb); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3446 | } |
John W. Linville | 103bf9f | 2009-08-20 16:34:15 -0400 | [diff] [blame] | 3447 | EXPORT_SYMBOL(ieee80211_rx); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3448 | |
| 3449 | /* This is a version of the rx handler that can be called from hard irq |
| 3450 | * context. Post the skb on the queue and schedule the tasklet */ |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3451 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3452 | { |
| 3453 | struct ieee80211_local *local = hw_to_local(hw); |
| 3454 | |
| 3455 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); |
| 3456 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3457 | skb->pkt_type = IEEE80211_RX_MSG; |
| 3458 | skb_queue_tail(&local->skb_queue, skb); |
| 3459 | tasklet_schedule(&local->tasklet); |
| 3460 | } |
| 3461 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |