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 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 57 | static inline int 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); |
Johannes Berg | 605f1a5 | 2012-11-22 10:20:58 +0100 | [diff] [blame] | 60 | struct ieee80211_hdr *hdr; |
| 61 | |
Emmanuel Grumbach | 0059b2b | 2014-02-05 16:36:01 +0200 | [diff] [blame] | 62 | hdr = (void *)(skb->data); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 63 | |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 64 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
| 65 | RX_FLAG_FAILED_PLCP_CRC | |
| 66 | RX_FLAG_AMPDU_IS_ZEROLEN)) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 67 | return 1; |
Emmanuel Grumbach | 0059b2b | 2014-02-05 16:36:01 +0200 | [diff] [blame] | 68 | if (unlikely(skb->len < 16 + present_fcs_len)) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 69 | return 1; |
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)) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 73 | return 1; |
| 74 | return 0; |
| 75 | } |
| 76 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 77 | static int |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 78 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
| 79 | struct ieee80211_rx_status *status) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 80 | { |
| 81 | int len; |
| 82 | |
| 83 | /* always present fields */ |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 84 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 85 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 86 | /* allocate extra bitmaps */ |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 87 | if (status->chains) |
| 88 | len += 4 * hweight8(status->chains); |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 89 | |
| 90 | if (ieee80211_have_rx_timestamp(status)) { |
| 91 | len = ALIGN(len, 8); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 92 | len += 8; |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 93 | } |
Johannes Berg | 7fee537 | 2009-01-30 11:13:06 +0100 | [diff] [blame] | 94 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 95 | len += 1; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 96 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 97 | /* antenna field, if we don't have per-chain info */ |
| 98 | if (!status->chains) |
| 99 | len += 1; |
| 100 | |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 101 | /* padding for RX_FLAGS if necessary */ |
| 102 | len = ALIGN(len, 2); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 103 | |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 104 | if (status->flag & RX_FLAG_HT) /* HT info */ |
| 105 | len += 3; |
| 106 | |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 107 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 108 | len = ALIGN(len, 4); |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 109 | len += 8; |
| 110 | } |
| 111 | |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 112 | if (status->flag & RX_FLAG_VHT) { |
| 113 | len = ALIGN(len, 2); |
| 114 | len += 12; |
| 115 | } |
| 116 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 117 | if (status->chains) { |
| 118 | /* antenna and antenna signal fields */ |
| 119 | len += 2 * hweight8(status->chains); |
| 120 | } |
| 121 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 122 | return len; |
| 123 | } |
| 124 | |
Johannes Berg | 00ea6de | 2012-09-05 15:54:51 +0200 | [diff] [blame] | 125 | /* |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 126 | * ieee80211_add_rx_radiotap_header - add radiotap header |
| 127 | * |
| 128 | * add a radiotap header containing all the fields which the hardware provided. |
| 129 | */ |
| 130 | static void |
| 131 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, |
| 132 | struct sk_buff *skb, |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 133 | struct ieee80211_rate *rate, |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 134 | int rtap_len, bool has_fcs) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 135 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 136 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 137 | struct ieee80211_radiotap_header *rthdr; |
| 138 | unsigned char *pos; |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 139 | __le32 *it_present; |
| 140 | u32 it_present_val; |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 141 | u16 rx_flags = 0; |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 142 | u16 channel_flags = 0; |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 143 | int mpdulen, chain; |
| 144 | unsigned long chains = status->chains; |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 145 | |
| 146 | mpdulen = skb->len; |
| 147 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) |
| 148 | mpdulen += FCS_LEN; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 149 | |
| 150 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); |
| 151 | memset(rthdr, 0, rtap_len); |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 152 | it_present = &rthdr->it_present; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 153 | |
| 154 | /* radiotap header, set always present flags */ |
Emmanuel Grumbach | 0059b2b | 2014-02-05 16:36:01 +0200 | [diff] [blame] | 155 | rthdr->it_len = cpu_to_le16(rtap_len); |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 156 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
| 157 | BIT(IEEE80211_RADIOTAP_CHANNEL) | |
| 158 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 159 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 160 | if (!status->chains) |
| 161 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); |
| 162 | |
| 163 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
| 164 | it_present_val |= |
| 165 | BIT(IEEE80211_RADIOTAP_EXT) | |
| 166 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); |
| 167 | put_unaligned_le32(it_present_val, it_present); |
| 168 | it_present++; |
| 169 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | |
| 170 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); |
| 171 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 172 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 173 | put_unaligned_le32(it_present_val, it_present); |
| 174 | |
| 175 | pos = (void *)(it_present + 1); |
| 176 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 177 | /* the order of the following fields is important */ |
| 178 | |
| 179 | /* IEEE80211_RADIOTAP_TSFT */ |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 180 | if (ieee80211_have_rx_timestamp(status)) { |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 181 | /* padding */ |
| 182 | while ((pos - (u8 *)rthdr) & 7) |
| 183 | *pos++ = 0; |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 184 | put_unaligned_le64( |
| 185 | ieee80211_calculate_rx_timestamp(local, status, |
| 186 | mpdulen, 0), |
| 187 | pos); |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 188 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 189 | pos += 8; |
| 190 | } |
| 191 | |
| 192 | /* IEEE80211_RADIOTAP_FLAGS */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 193 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 194 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
Johannes Berg | aae8983 | 2009-03-13 12:52:10 +0100 | [diff] [blame] | 195 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
| 196 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; |
Bruno Randolf | b4f28bb | 2008-07-30 17:19:55 +0200 | [diff] [blame] | 197 | if (status->flag & RX_FLAG_SHORTPRE) |
| 198 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 199 | pos++; |
| 200 | |
| 201 | /* IEEE80211_RADIOTAP_RATE */ |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 202 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 203 | /* |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 204 | * Without rate information don't add it. If we have, |
Mohammed Shafi Shajakhan | 38f37be | 2011-02-07 10:10:04 +0530 | [diff] [blame] | 205 | * MCS information is a separate field in radiotap, |
Johannes Berg | 73b4809 | 2011-04-18 17:05:21 +0200 | [diff] [blame] | 206 | * added below. The byte here is needed as padding |
| 207 | * for the channel though, so initialise it to 0. |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 208 | */ |
| 209 | *pos = 0; |
Jouni Malinen | 8d6f658 | 2008-12-15 10:37:50 +0200 | [diff] [blame] | 210 | } else { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 211 | int shift = 0; |
Jouni Malinen | ebe6c7b | 2009-01-10 11:47:33 +0200 | [diff] [blame] | 212 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 213 | if (status->flag & RX_FLAG_10MHZ) |
| 214 | shift = 1; |
| 215 | else if (status->flag & RX_FLAG_5MHZ) |
| 216 | shift = 2; |
| 217 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); |
Jouni Malinen | 8d6f658 | 2008-12-15 10:37:50 +0200 | [diff] [blame] | 218 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 219 | pos++; |
| 220 | |
| 221 | /* IEEE80211_RADIOTAP_CHANNEL */ |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 222 | put_unaligned_le16(status->freq, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 223 | pos += 2; |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 224 | if (status->flag & RX_FLAG_10MHZ) |
| 225 | channel_flags |= IEEE80211_CHAN_HALF; |
| 226 | else if (status->flag & RX_FLAG_5MHZ) |
| 227 | channel_flags |= IEEE80211_CHAN_QUARTER; |
| 228 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 229 | if (status->band == IEEE80211_BAND_5GHZ) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 230 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 231 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 232 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 233 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 234 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 235 | else if (rate) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 236 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 237 | else |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 238 | channel_flags |= IEEE80211_CHAN_2GHZ; |
| 239 | put_unaligned_le16(channel_flags, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 240 | pos += 2; |
| 241 | |
| 242 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ |
Felix Fietkau | fe8431f | 2012-03-01 18:00:07 +0100 | [diff] [blame] | 243 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
| 244 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 245 | *pos = status->signal; |
| 246 | rthdr->it_present |= |
| 247 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); |
| 248 | pos++; |
| 249 | } |
| 250 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 251 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
| 252 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 253 | if (!status->chains) { |
| 254 | /* IEEE80211_RADIOTAP_ANTENNA */ |
| 255 | *pos = status->antenna; |
| 256 | pos++; |
| 257 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 258 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 259 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
| 260 | |
| 261 | /* IEEE80211_RADIOTAP_RX_FLAGS */ |
| 262 | /* ensure 2 byte alignment for the 2 byte field as required */ |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 263 | if ((pos - (u8 *)rthdr) & 1) |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 264 | *pos++ = 0; |
Johannes Berg | aae8983 | 2009-03-13 12:52:10 +0100 | [diff] [blame] | 265 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 266 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
| 267 | put_unaligned_le16(rx_flags, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 268 | pos += 2; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 269 | |
| 270 | if (status->flag & RX_FLAG_HT) { |
Oleksij Rempel | 786677d | 2013-05-24 12:05:45 +0200 | [diff] [blame] | 271 | unsigned int stbc; |
| 272 | |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 273 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
Johannes Berg | ac55d2f | 2012-05-10 09:09:10 +0200 | [diff] [blame] | 274 | *pos++ = local->hw.radiotap_mcs_details; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 275 | *pos = 0; |
| 276 | if (status->flag & RX_FLAG_SHORT_GI) |
| 277 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; |
| 278 | if (status->flag & RX_FLAG_40MHZ) |
| 279 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; |
Johannes Berg | ac55d2f | 2012-05-10 09:09:10 +0200 | [diff] [blame] | 280 | if (status->flag & RX_FLAG_HT_GF) |
| 281 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; |
Emmanuel Grumbach | 63c361f | 2014-02-05 12:48:53 +0200 | [diff] [blame] | 282 | if (status->flag & RX_FLAG_LDPC) |
| 283 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; |
Oleksij Rempel | 786677d | 2013-05-24 12:05:45 +0200 | [diff] [blame] | 284 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
| 285 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 286 | pos++; |
| 287 | *pos++ = status->rate_idx; |
| 288 | } |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 289 | |
| 290 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
| 291 | u16 flags = 0; |
| 292 | |
| 293 | /* ensure 4 byte alignment */ |
| 294 | while ((pos - (u8 *)rthdr) & 3) |
| 295 | pos++; |
| 296 | rthdr->it_present |= |
| 297 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); |
| 298 | put_unaligned_le32(status->ampdu_reference, pos); |
| 299 | pos += 4; |
| 300 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) |
| 301 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; |
| 302 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) |
| 303 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; |
| 304 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) |
| 305 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; |
| 306 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) |
| 307 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; |
| 308 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) |
| 309 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; |
| 310 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) |
| 311 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; |
| 312 | put_unaligned_le16(flags, pos); |
| 313 | pos += 2; |
| 314 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) |
| 315 | *pos++ = status->ampdu_delimiter_crc; |
| 316 | else |
| 317 | *pos++ = 0; |
| 318 | *pos++ = 0; |
| 319 | } |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 320 | |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 321 | if (status->flag & RX_FLAG_VHT) { |
| 322 | u16 known = local->hw.radiotap_vht_details; |
| 323 | |
| 324 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); |
| 325 | /* known field - how to handle 80+80? */ |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 326 | if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 327 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
| 328 | put_unaligned_le16(known, pos); |
| 329 | pos += 2; |
| 330 | /* flags */ |
| 331 | if (status->flag & RX_FLAG_SHORT_GI) |
| 332 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; |
Emmanuel Grumbach | 63c361f | 2014-02-05 12:48:53 +0200 | [diff] [blame] | 333 | /* in VHT, STBC is binary */ |
| 334 | if (status->flag & RX_FLAG_STBC_MASK) |
| 335 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; |
Emmanuel Grumbach | fb378c2 | 2014-03-04 10:35:25 +0200 | [diff] [blame] | 336 | if (status->vht_flag & RX_VHT_FLAG_BF) |
| 337 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 338 | pos++; |
| 339 | /* bandwidth */ |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 340 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 341 | *pos++ = 4; |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 342 | else if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 343 | *pos++ = 0; /* marked not known above */ |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 344 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 345 | *pos++ = 11; |
| 346 | else if (status->flag & RX_FLAG_40MHZ) |
| 347 | *pos++ = 1; |
| 348 | else /* 20 MHz */ |
| 349 | *pos++ = 0; |
| 350 | /* MCS/NSS */ |
| 351 | *pos = (status->rate_idx << 4) | status->vht_nss; |
| 352 | pos += 4; |
| 353 | /* coding field */ |
Emmanuel Grumbach | 63c361f | 2014-02-05 12:48:53 +0200 | [diff] [blame] | 354 | if (status->flag & RX_FLAG_LDPC) |
| 355 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 356 | pos++; |
| 357 | /* group ID */ |
| 358 | pos++; |
| 359 | /* partial_aid */ |
| 360 | pos += 2; |
| 361 | } |
| 362 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 363 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
| 364 | *pos++ = status->chain_signal[chain]; |
| 365 | *pos++ = chain; |
| 366 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 367 | } |
| 368 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 369 | /* |
| 370 | * This function copies a received frame to all monitor interfaces and |
| 371 | * returns a cleaned-up SKB that no longer includes the FCS nor the |
| 372 | * radiotap header the driver might have added. |
| 373 | */ |
| 374 | static struct sk_buff * |
| 375 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 376 | struct ieee80211_rate *rate) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 377 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 378 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 379 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 380 | int needed_headroom; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 381 | struct sk_buff *skb, *skb2; |
| 382 | struct net_device *prev_dev = NULL; |
| 383 | int present_fcs_len = 0; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 384 | |
| 385 | /* |
| 386 | * First, we may need to make a copy of the skb because |
| 387 | * (1) we need to modify it for radiotap (if not present), and |
| 388 | * (2) the other RX handlers will modify the skb we got. |
| 389 | * |
| 390 | * We don't need to, of course, if we aren't going to return |
| 391 | * the SKB because it has a bad FCS/PLCP checksum. |
| 392 | */ |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 393 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 394 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
| 395 | present_fcs_len = FCS_LEN; |
| 396 | |
Emmanuel Grumbach | 0059b2b | 2014-02-05 16:36:01 +0200 | [diff] [blame] | 397 | /* ensure hdr->frame_control is in skb head */ |
| 398 | if (!pskb_may_pull(origskb, 2)) { |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 399 | dev_kfree_skb(origskb); |
| 400 | return NULL; |
| 401 | } |
| 402 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 403 | if (!local->monitors) { |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 404 | if (should_drop_frame(origskb, present_fcs_len)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 405 | dev_kfree_skb(origskb); |
| 406 | return NULL; |
| 407 | } |
| 408 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 409 | return remove_monitor_info(local, origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 410 | } |
| 411 | |
Helmut Schaa | 751413e | 2012-12-05 14:36:12 +0100 | [diff] [blame] | 412 | /* room for the radiotap header based on driver features */ |
| 413 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
| 414 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 415 | if (should_drop_frame(origskb, present_fcs_len)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 416 | /* only need to expand headroom if necessary */ |
| 417 | skb = origskb; |
| 418 | origskb = NULL; |
| 419 | |
| 420 | /* |
| 421 | * This shouldn't trigger often because most devices have an |
| 422 | * RX header they pull before we get here, and that should |
| 423 | * be big enough for our radiotap information. We should |
| 424 | * probably export the length to drivers so that we can have |
| 425 | * them allocate enough headroom to start with. |
| 426 | */ |
| 427 | if (skb_headroom(skb) < needed_headroom && |
Johannes Berg | c49e5ea | 2007-12-11 21:33:42 +0100 | [diff] [blame] | 428 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 429 | dev_kfree_skb(skb); |
| 430 | return NULL; |
| 431 | } |
| 432 | } else { |
| 433 | /* |
| 434 | * Need to make a copy and possibly remove radiotap header |
| 435 | * and FCS from the original. |
| 436 | */ |
| 437 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); |
| 438 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 439 | origskb = remove_monitor_info(local, origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 440 | |
| 441 | if (!skb) |
| 442 | return origskb; |
| 443 | } |
| 444 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 445 | /* prepend radiotap information */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 446 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
| 447 | true); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 448 | |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 449 | skb_reset_mac_header(skb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 450 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 451 | skb->pkt_type = PACKET_OTHERHOST; |
| 452 | skb->protocol = htons(ETH_P_802_2); |
| 453 | |
| 454 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 455 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 456 | continue; |
| 457 | |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 458 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
| 459 | continue; |
| 460 | |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 461 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 462 | continue; |
| 463 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 464 | if (prev_dev) { |
| 465 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 466 | if (skb2) { |
| 467 | skb2->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 468 | netif_receive_skb(skb2); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 469 | } |
| 470 | } |
| 471 | |
| 472 | prev_dev = sdata->dev; |
| 473 | sdata->dev->stats.rx_packets++; |
| 474 | sdata->dev->stats.rx_bytes += skb->len; |
| 475 | } |
| 476 | |
| 477 | if (prev_dev) { |
| 478 | skb->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 479 | netif_receive_skb(skb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 480 | } else |
| 481 | dev_kfree_skb(skb); |
| 482 | |
| 483 | return origskb; |
| 484 | } |
| 485 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 486 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 487 | { |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 488 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 489 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 490 | int tid, seqno_idx, security_idx; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 491 | |
| 492 | /* does the frame have a qos control field? */ |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 493 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
| 494 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 495 | /* frame has qos control */ |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 496 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
Johannes Berg | 04b7dcf | 2011-06-22 10:06:59 +0200 | [diff] [blame] | 497 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 498 | status->rx_flags |= IEEE80211_RX_AMSDU; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 499 | |
| 500 | seqno_idx = tid; |
| 501 | security_idx = tid; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 502 | } else { |
Johannes Berg | 1411f9b | 2008-07-10 10:11:02 +0200 | [diff] [blame] | 503 | /* |
| 504 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): |
| 505 | * |
| 506 | * Sequence numbers for management frames, QoS data |
| 507 | * frames with a broadcast/multicast address in the |
| 508 | * Address 1 field, and all non-QoS data frames sent |
| 509 | * by QoS STAs are assigned using an additional single |
| 510 | * modulo-4096 counter, [...] |
| 511 | * |
| 512 | * We also use that counter for non-QoS STAs. |
| 513 | */ |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 514 | seqno_idx = IEEE80211_NUM_TIDS; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 515 | security_idx = 0; |
| 516 | if (ieee80211_is_mgmt(hdr->frame_control)) |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 517 | security_idx = IEEE80211_NUM_TIDS; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 518 | tid = 0; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 519 | } |
Johannes Berg | 52865df | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 520 | |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 521 | rx->seqno_idx = seqno_idx; |
| 522 | rx->security_idx = security_idx; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 523 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
| 524 | * For now, set skb->priority to 0 for other cases. */ |
| 525 | rx->skb->priority = (tid > 7) ? 0 : tid; |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 526 | } |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 527 | |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 528 | /** |
| 529 | * DOC: Packet alignment |
| 530 | * |
| 531 | * Drivers always need to pass packets that are aligned to two-byte boundaries |
| 532 | * to the stack. |
| 533 | * |
| 534 | * Additionally, should, if possible, align the payload data in a way that |
| 535 | * guarantees that the contained IP header is aligned to a four-byte |
| 536 | * boundary. In the case of regular frames, this simply means aligning the |
| 537 | * payload to a four-byte boundary (because either the IP header is directly |
| 538 | * 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] | 539 | * in front of it). If the payload data is not properly aligned and the |
| 540 | * architecture doesn't support efficient unaligned operations, mac80211 |
| 541 | * will align the data. |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 542 | * |
| 543 | * With A-MSDU frames, however, the payload data address must yield two modulo |
| 544 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that |
| 545 | * push the IP header further back to a multiple of four again. Thankfully, the |
| 546 | * specs were sane enough this time around to require padding each A-MSDU |
| 547 | * subframe to a length that is a multiple of four. |
| 548 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 549 | * 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] | 550 | * the payload is not supported, the driver is required to move the 802.11 |
| 551 | * header to be directly in front of the payload in that case. |
| 552 | */ |
| 553 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 554 | { |
Kalle Valo | 59d9cb0 | 2009-12-17 13:54:57 +0100 | [diff] [blame] | 555 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 556 | WARN_ONCE((unsigned long)rx->skb->data & 1, |
| 557 | "unaligned packet at 0x%p\n", rx->skb->data); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 558 | #endif |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 559 | } |
| 560 | |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 561 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 562 | /* rx handlers */ |
| 563 | |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 564 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
| 565 | { |
| 566 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 567 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 568 | if (is_multicast_ether_addr(hdr->addr1)) |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 569 | return 0; |
| 570 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 571 | return ieee80211_is_robust_mgmt_frame(skb); |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | |
| 575 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) |
| 576 | { |
| 577 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 578 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 579 | if (!is_multicast_ether_addr(hdr->addr1)) |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 580 | return 0; |
| 581 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 582 | return ieee80211_is_robust_mgmt_frame(skb); |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | |
| 586 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ |
| 587 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) |
| 588 | { |
| 589 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; |
| 590 | struct ieee80211_mmie *mmie; |
| 591 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 592 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 593 | return -1; |
| 594 | |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 595 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 596 | return -1; /* not a robust management frame */ |
| 597 | |
| 598 | mmie = (struct ieee80211_mmie *) |
| 599 | (skb->data + skb->len - sizeof(*mmie)); |
| 600 | if (mmie->element_id != WLAN_EID_MMIE || |
| 601 | mmie->length != sizeof(*mmie) - 2) |
| 602 | return -1; |
| 603 | |
| 604 | return le16_to_cpu(mmie->key_id); |
| 605 | } |
| 606 | |
Max Stepanov | 2475b1c | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 607 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
| 608 | struct sk_buff *skb) |
| 609 | { |
| 610 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 611 | __le16 fc; |
| 612 | int hdrlen; |
| 613 | u8 keyid; |
| 614 | |
| 615 | fc = hdr->frame_control; |
| 616 | hdrlen = ieee80211_hdrlen(fc); |
| 617 | |
| 618 | if (skb->len < hdrlen + cs->hdr_len) |
| 619 | return -EINVAL; |
| 620 | |
| 621 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); |
| 622 | keyid &= cs->key_idx_mask; |
| 623 | keyid >>= cs->key_idx_shift; |
| 624 | |
| 625 | return keyid; |
| 626 | } |
| 627 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 628 | 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] | 629 | { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 630 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 631 | char *dev_addr = rx->sdata->vif.addr; |
Johannes Berg | d6d1a5a | 2008-02-25 16:24:38 +0100 | [diff] [blame] | 632 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 633 | if (ieee80211_is_data(hdr->frame_control)) { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 634 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 635 | if (ieee80211_has_tods(hdr->frame_control) || |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 636 | !ieee80211_has_fromds(hdr->frame_control)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 637 | return RX_DROP_MONITOR; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 638 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 639 | return RX_DROP_MONITOR; |
| 640 | } else { |
| 641 | if (!ieee80211_has_a4(hdr->frame_control)) |
| 642 | return RX_DROP_MONITOR; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 643 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 644 | return RX_DROP_MONITOR; |
| 645 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | /* If there is not an established peer link and this is not a peer link |
| 649 | * establisment frame, beacon or probe, drop the frame. |
| 650 | */ |
| 651 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 652 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 653 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | d6d1a5a | 2008-02-25 16:24:38 +0100 | [diff] [blame] | 654 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 655 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 656 | return RX_DROP_MONITOR; |
| 657 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 658 | if (ieee80211_is_action(hdr->frame_control)) { |
Javier Cardona | d3aaec8 | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 659 | u8 category; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 660 | |
| 661 | /* make sure category field is present */ |
| 662 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) |
| 663 | return RX_DROP_MONITOR; |
| 664 | |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 665 | mgmt = (struct ieee80211_mgmt *)hdr; |
Javier Cardona | d3aaec8 | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 666 | category = mgmt->u.action.category; |
| 667 | if (category != WLAN_CATEGORY_MESH_ACTION && |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 668 | category != WLAN_CATEGORY_SELF_PROTECTED) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 669 | return RX_DROP_MONITOR; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 670 | return RX_CONTINUE; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 671 | } |
| 672 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 673 | if (ieee80211_is_probe_req(hdr->frame_control) || |
| 674 | ieee80211_is_probe_resp(hdr->frame_control) || |
Javier Cardona | 7183912 | 2011-04-07 15:08:31 -0700 | [diff] [blame] | 675 | ieee80211_is_beacon(hdr->frame_control) || |
| 676 | ieee80211_is_auth(hdr->frame_control)) |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 677 | return RX_CONTINUE; |
| 678 | |
| 679 | return RX_DROP_MONITOR; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 680 | } |
| 681 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 682 | return RX_CONTINUE; |
| 683 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 684 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 685 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 686 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 687 | int index, |
| 688 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 689 | { |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 690 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 691 | struct ieee80211_rx_status *status; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 692 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 693 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 694 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 695 | if (!skb) |
| 696 | goto no_frame; |
| 697 | |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 698 | /* release the frame from the reorder ring buffer */ |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 699 | tid_agg_rx->stored_mpdu_num--; |
| 700 | tid_agg_rx->reorder_buf[index] = NULL; |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 701 | status = IEEE80211_SKB_RXCB(skb); |
| 702 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 703 | __skb_queue_tail(frames, skb); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 704 | |
| 705 | no_frame: |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 706 | 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] | 707 | } |
| 708 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 709 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 710 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 711 | u16 head_seq_num, |
| 712 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 713 | { |
| 714 | int index; |
| 715 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 716 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 717 | |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 718 | 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] | 719 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 720 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
| 721 | frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 722 | } |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If |
| 727 | * the skb was added to the buffer longer than this time ago, the earlier |
| 728 | * frames that have not yet been received are assumed to be lost and the skb |
| 729 | * can be released for processing. This may also release other skb's from the |
| 730 | * reorder buffer if there are no additional gaps between the frames. |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 731 | * |
| 732 | * Callers must hold tid_agg_rx->reorder_lock. |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 733 | */ |
| 734 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) |
| 735 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 736 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 737 | struct tid_ampdu_rx *tid_agg_rx, |
| 738 | struct sk_buff_head *frames) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 739 | { |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 740 | int index, j; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 741 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 742 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 743 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 744 | /* release the buffer until next missing frame */ |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 745 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 746 | if (!tid_agg_rx->reorder_buf[index] && |
Eliad Peller | 07ae2df | 2012-02-01 18:48:09 +0200 | [diff] [blame] | 747 | tid_agg_rx->stored_mpdu_num) { |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 748 | /* |
| 749 | * No buffers ready to be released, but check whether any |
| 750 | * frames in the reorder buffer have timed out. |
| 751 | */ |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 752 | int skipped = 1; |
| 753 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; |
| 754 | j = (j + 1) % tid_agg_rx->buf_size) { |
| 755 | if (!tid_agg_rx->reorder_buf[j]) { |
| 756 | skipped++; |
| 757 | continue; |
| 758 | } |
Daniel Halperin | 499fe9a | 2011-03-24 16:01:48 -0700 | [diff] [blame] | 759 | if (skipped && |
| 760 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 761 | HT_RX_REORDER_BUF_TIMEOUT)) |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 762 | goto set_release_timer; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 763 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 764 | ht_dbg_ratelimited(sdata, |
| 765 | "release an RX reorder frame due to timeout on earlier frames\n"); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 766 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
| 767 | frames); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 768 | |
| 769 | /* |
| 770 | * Increment the head seq# also for the skipped slots. |
| 771 | */ |
| 772 | tid_agg_rx->head_seq_num = |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 773 | (tid_agg_rx->head_seq_num + |
| 774 | skipped) & IEEE80211_SN_MASK; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 775 | skipped = 0; |
| 776 | } |
| 777 | } else while (tid_agg_rx->reorder_buf[index]) { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 778 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
| 779 | frames); |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 780 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 781 | } |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 782 | |
| 783 | if (tid_agg_rx->stored_mpdu_num) { |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 784 | 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] | 785 | |
| 786 | for (; j != (index - 1) % tid_agg_rx->buf_size; |
| 787 | j = (j + 1) % tid_agg_rx->buf_size) { |
| 788 | if (tid_agg_rx->reorder_buf[j]) |
| 789 | break; |
| 790 | } |
| 791 | |
| 792 | set_release_timer: |
| 793 | |
| 794 | mod_timer(&tid_agg_rx->reorder_timer, |
Christian Lamparter | 334df73 | 2011-04-24 20:41:16 +0200 | [diff] [blame] | 795 | tid_agg_rx->reorder_time[j] + 1 + |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 796 | HT_RX_REORDER_BUF_TIMEOUT); |
| 797 | } else { |
| 798 | del_timer(&tid_agg_rx->reorder_timer); |
| 799 | } |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 800 | } |
| 801 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 802 | /* |
| 803 | * As this function belongs to the RX path it must be under |
| 804 | * rcu_read_lock protection. It returns false if the frame |
| 805 | * can be processed immediately, true if it was consumed. |
| 806 | */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 807 | 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] | 808 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 809 | struct sk_buff *skb, |
| 810 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 811 | { |
| 812 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 813 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
| 814 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; |
| 815 | u16 head_seq_num, buf_size; |
| 816 | int index; |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 817 | bool ret = true; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 818 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 819 | spin_lock(&tid_agg_rx->reorder_lock); |
| 820 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 821 | buf_size = tid_agg_rx->buf_size; |
| 822 | head_seq_num = tid_agg_rx->head_seq_num; |
| 823 | |
| 824 | /* frame with out of date sequence number */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 825 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 826 | dev_kfree_skb(skb); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 827 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | /* |
| 831 | * If frame the sequence number exceeds our buffering window |
| 832 | * size release some previous frames to make room for this one. |
| 833 | */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 834 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
| 835 | head_seq_num = ieee80211_sn_inc( |
| 836 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 837 | /* release stored frames up to new head to stack */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 838 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 839 | head_seq_num, frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | /* Now the new frame is always in the range of the reordering buffer */ |
| 843 | |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 844 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 845 | |
| 846 | /* check if we already stored this frame */ |
| 847 | if (tid_agg_rx->reorder_buf[index]) { |
| 848 | dev_kfree_skb(skb); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 849 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | /* |
| 853 | * If the current MPDU is in the right order and nothing else |
| 854 | * is stored we can process it directly, no need to buffer it. |
Johannes Berg | c835b21 | 2011-03-15 23:17:01 +0100 | [diff] [blame] | 855 | * If it is first but there's something stored, we may be able |
| 856 | * to release frames after this one. |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 857 | */ |
| 858 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && |
| 859 | tid_agg_rx->stored_mpdu_num == 0) { |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 860 | tid_agg_rx->head_seq_num = |
| 861 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 862 | ret = false; |
| 863 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 864 | } |
| 865 | |
| 866 | /* put the frame in the reordering buffer */ |
| 867 | tid_agg_rx->reorder_buf[index] = skb; |
| 868 | tid_agg_rx->reorder_time[index] = jiffies; |
| 869 | tid_agg_rx->stored_mpdu_num++; |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 870 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 871 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 872 | out: |
| 873 | spin_unlock(&tid_agg_rx->reorder_lock); |
| 874 | return ret; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 875 | } |
| 876 | |
| 877 | /* |
| 878 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns |
| 879 | * true if the MPDU was buffered, false if it should be processed. |
| 880 | */ |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 881 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
| 882 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 883 | { |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 884 | struct sk_buff *skb = rx->skb; |
| 885 | struct ieee80211_local *local = rx->local; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 886 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
Thomas Pedersen | 660c6a4 | 2011-11-03 21:11:12 -0700 | [diff] [blame] | 887 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 888 | struct sta_info *sta = rx->sta; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 889 | struct tid_ampdu_rx *tid_agg_rx; |
| 890 | u16 sc; |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 891 | u8 tid, ack_policy; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 892 | |
Johannes Berg | 051a41f | 2013-11-20 11:28:27 +0100 | [diff] [blame] | 893 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
| 894 | is_multicast_ether_addr(hdr->addr1)) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 895 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 896 | |
| 897 | /* |
| 898 | * filter the QoS data rx stream according to |
| 899 | * STA/TID and check if this STA/TID is on aggregation |
| 900 | */ |
| 901 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 902 | if (!sta) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 903 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 904 | |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 905 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
| 906 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 907 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
| 908 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 909 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
| 910 | if (!tid_agg_rx) |
| 911 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 912 | |
| 913 | /* qos null data frames are excluded */ |
| 914 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 915 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 916 | |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 917 | /* not part of a BA session */ |
| 918 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && |
| 919 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) |
| 920 | goto dont_reorder; |
| 921 | |
Thomas Pedersen | 660c6a4 | 2011-11-03 21:11:12 -0700 | [diff] [blame] | 922 | /* not actually part of this BA session */ |
| 923 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 924 | goto dont_reorder; |
| 925 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 926 | /* new, potentially un-ordered, ampdu frame - process it */ |
| 927 | |
| 928 | /* reset session timer */ |
| 929 | if (tid_agg_rx->timeout) |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 930 | tid_agg_rx->last_rx = jiffies; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 931 | |
| 932 | /* if this mpdu is fragmented - terminate rx aggregation session */ |
| 933 | sc = le16_to_cpu(hdr->seq_ctrl); |
| 934 | if (sc & IEEE80211_SCTL_FRAG) { |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 935 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
Johannes Berg | 344eec6 | 2010-06-10 10:21:36 +0200 | [diff] [blame] | 936 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
| 937 | ieee80211_queue_work(&local->hw, &rx->sdata->work); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 938 | return; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 939 | } |
| 940 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 941 | /* |
| 942 | * No locking needed -- we will only ever process one |
| 943 | * RX packet at a time, and thus own tid_agg_rx. All |
| 944 | * other code manipulating it needs to (and does) make |
| 945 | * sure that we cannot get to it any more before doing |
| 946 | * anything with it. |
| 947 | */ |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 948 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
| 949 | frames)) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 950 | return; |
| 951 | |
| 952 | dont_reorder: |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 953 | __skb_queue_tail(frames, skb); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 954 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 955 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 956 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 957 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 958 | { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 959 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 960 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 961 | |
Johannes Berg | 6b0f327 | 2013-07-11 22:33:26 +0200 | [diff] [blame] | 962 | /* |
| 963 | * Drop duplicate 802.11 retransmissions |
| 964 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") |
| 965 | */ |
| 966 | if (rx->skb->len >= 24 && rx->sta && |
| 967 | !ieee80211_is_ctl(hdr->frame_control) && |
| 968 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
| 969 | !is_multicast_ether_addr(hdr->addr1)) { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 970 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 971 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 972 | hdr->seq_ctrl)) { |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 973 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 974 | rx->local->dot11FrameDuplicateCount++; |
| 975 | rx->sta->num_duplicates++; |
| 976 | } |
Felix Fietkau | b1f9331 | 2011-02-04 19:20:08 +0100 | [diff] [blame] | 977 | return RX_DROP_UNUSABLE; |
Michal Kazior | 0cfcefe | 2013-09-23 15:34:38 +0200 | [diff] [blame] | 978 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 979 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
Michal Kazior | 0cfcefe | 2013-09-23 15:34:38 +0200 | [diff] [blame] | 980 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 981 | } |
| 982 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 983 | if (unlikely(rx->skb->len < 16)) { |
| 984 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 985 | return RX_DROP_MONITOR; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 986 | } |
| 987 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 988 | /* Drop disallowed frame classes based on STA auth/assoc state; |
| 989 | * IEEE 802.11, Chap 5.5. |
| 990 | * |
Johannes Berg | ccd7b36 | 2008-09-11 00:01:56 +0200 | [diff] [blame] | 991 | * mac80211 filters only based on association state, i.e. it drops |
| 992 | * Class 3 frames from not associated stations. hostapd sends |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 993 | * deauth/disassoc frames when needed. In addition, hostapd is |
| 994 | * responsible for filtering on both auth and assoc states. |
| 995 | */ |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 996 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 997 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 998 | return ieee80211_rx_mesh_check(rx); |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 999 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 1000 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
| 1001 | ieee80211_is_pspoll(hdr->frame_control)) && |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1002 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
Bill Jordan | 1be7fe8 | 2010-10-01 11:20:41 -0400 | [diff] [blame] | 1003 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1004 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 1005 | /* |
| 1006 | * accept port control frames from the AP even when it's not |
| 1007 | * yet marked ASSOC to prevent a race where we don't set the |
| 1008 | * assoc bit quickly enough before it sends the first frame |
| 1009 | */ |
| 1010 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1011 | ieee80211_is_data_present(hdr->frame_control)) { |
Johannes Berg | 6dbda2d | 2012-10-26 00:41:23 +0200 | [diff] [blame] | 1012 | unsigned int hdrlen; |
| 1013 | __be16 ethertype; |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1014 | |
Johannes Berg | 6dbda2d | 2012-10-26 00:41:23 +0200 | [diff] [blame] | 1015 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| 1016 | |
| 1017 | if (rx->skb->len < hdrlen + 8) |
| 1018 | return RX_DROP_MONITOR; |
| 1019 | |
| 1020 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); |
| 1021 | if (ethertype == rx->sdata->control_port_protocol) |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1022 | return RX_CONTINUE; |
| 1023 | } |
Johannes Berg | 21fc756 | 2011-11-04 11:18:13 +0100 | [diff] [blame] | 1024 | |
| 1025 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 1026 | cfg80211_rx_spurious_frame(rx->sdata->dev, |
| 1027 | hdr->addr2, |
| 1028 | GFP_ATOMIC)) |
| 1029 | return RX_DROP_UNUSABLE; |
| 1030 | |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1031 | return RX_DROP_MONITOR; |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1032 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1033 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1034 | return RX_CONTINUE; |
Johannes Berg | 570bd53 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1035 | } |
| 1036 | |
| 1037 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1038 | static ieee80211_rx_result debug_noinline |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 1039 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) |
| 1040 | { |
| 1041 | struct ieee80211_local *local; |
| 1042 | struct ieee80211_hdr *hdr; |
| 1043 | struct sk_buff *skb; |
| 1044 | |
| 1045 | local = rx->local; |
| 1046 | skb = rx->skb; |
| 1047 | hdr = (struct ieee80211_hdr *) skb->data; |
| 1048 | |
| 1049 | if (!local->pspolling) |
| 1050 | return RX_CONTINUE; |
| 1051 | |
| 1052 | if (!ieee80211_has_fromds(hdr->frame_control)) |
| 1053 | /* this is not from AP */ |
| 1054 | return RX_CONTINUE; |
| 1055 | |
| 1056 | if (!ieee80211_is_data(hdr->frame_control)) |
| 1057 | return RX_CONTINUE; |
| 1058 | |
| 1059 | if (!ieee80211_has_moredata(hdr->frame_control)) { |
| 1060 | /* AP has no more frames buffered for us */ |
| 1061 | local->pspolling = false; |
| 1062 | return RX_CONTINUE; |
| 1063 | } |
| 1064 | |
| 1065 | /* more data bit is set, let's request a new frame from the AP */ |
| 1066 | ieee80211_send_pspoll(local, rx->sdata); |
| 1067 | |
| 1068 | return RX_CONTINUE; |
| 1069 | } |
| 1070 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1071 | static void sta_ps_start(struct sta_info *sta) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1072 | { |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 1073 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Christian Lamparter | 4571d3b | 2008-11-30 00:48:41 +0100 | [diff] [blame] | 1074 | struct ieee80211_local *local = sdata->local; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1075 | struct ps_data *ps; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1076 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1077 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
| 1078 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 1079 | ps = &sdata->bss->ps; |
| 1080 | else |
| 1081 | return; |
| 1082 | |
| 1083 | atomic_inc(&ps->num_sta_ps); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1084 | set_sta_flag(sta, WLAN_STA_PS_STA); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1085 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
| 1086 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1087 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
| 1088 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1089 | } |
| 1090 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1091 | static void sta_ps_end(struct sta_info *sta) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1092 | { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1093 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
| 1094 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | 004c872 | 2008-02-20 11:21:35 +0100 | [diff] [blame] | 1095 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1096 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
Johannes Berg | e3685e0 | 2014-02-20 11:19:58 +0100 | [diff] [blame] | 1097 | /* |
| 1098 | * Clear the flag only if the other one is still set |
| 1099 | * so that the TX path won't start TX'ing new frames |
| 1100 | * directly ... In the case that the driver flag isn't |
| 1101 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. |
| 1102 | */ |
| 1103 | clear_sta_flag(sta, WLAN_STA_PS_STA); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1104 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
| 1105 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | af81858 | 2009-11-06 11:35:50 +0100 | [diff] [blame] | 1106 | return; |
| 1107 | } |
| 1108 | |
| 1109 | ieee80211_sta_ps_deliver_wakeup(sta); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1110 | } |
| 1111 | |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1112 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
| 1113 | { |
| 1114 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); |
| 1115 | bool in_ps; |
| 1116 | |
| 1117 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); |
| 1118 | |
| 1119 | /* Don't let the same PS state be set twice */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1120 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1121 | if ((start && in_ps) || (!start && !in_ps)) |
| 1122 | return -EINVAL; |
| 1123 | |
| 1124 | if (start) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1125 | sta_ps_start(sta_inf); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1126 | else |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1127 | sta_ps_end(sta_inf); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1128 | |
| 1129 | return 0; |
| 1130 | } |
| 1131 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); |
| 1132 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1133 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1134 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) |
| 1135 | { |
| 1136 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1137 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; |
| 1138 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
| 1139 | int tid, ac; |
| 1140 | |
| 1141 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 1142 | return RX_CONTINUE; |
| 1143 | |
| 1144 | if (sdata->vif.type != NL80211_IFTYPE_AP && |
| 1145 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) |
| 1146 | return RX_CONTINUE; |
| 1147 | |
| 1148 | /* |
| 1149 | * The device handles station powersave, so don't do anything about |
| 1150 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from |
| 1151 | * it to mac80211 since they're handled.) |
| 1152 | */ |
| 1153 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) |
| 1154 | return RX_CONTINUE; |
| 1155 | |
| 1156 | /* |
| 1157 | * Don't do anything if the station isn't already asleep. In |
| 1158 | * the uAPSD case, the station will probably be marked asleep, |
| 1159 | * in the PS-Poll case the station must be confused ... |
| 1160 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1161 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1162 | return RX_CONTINUE; |
| 1163 | |
| 1164 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1165 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
| 1166 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
Johannes Berg | deeaee1 | 2011-09-29 16:04:35 +0200 | [diff] [blame] | 1167 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
| 1168 | else |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1169 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
Johannes Berg | deeaee1 | 2011-09-29 16:04:35 +0200 | [diff] [blame] | 1170 | } |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1171 | |
| 1172 | /* Free PS Poll skb here instead of returning RX_DROP that would |
| 1173 | * count as an dropped frame. */ |
| 1174 | dev_kfree_skb(rx->skb); |
| 1175 | |
| 1176 | return RX_QUEUED; |
| 1177 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && |
| 1178 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
| 1179 | ieee80211_has_pm(hdr->frame_control) && |
| 1180 | (ieee80211_is_data_qos(hdr->frame_control) || |
| 1181 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { |
| 1182 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
| 1183 | ac = ieee802_1d_to_ac[tid & 7]; |
| 1184 | |
| 1185 | /* |
| 1186 | * If this AC is not trigger-enabled do nothing. |
| 1187 | * |
| 1188 | * NB: This could/should check a separate bitmap of trigger- |
| 1189 | * enabled queues, but for now we only implement uAPSD w/o |
| 1190 | * TSPEC changes to the ACs, so they're always the same. |
| 1191 | */ |
| 1192 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) |
| 1193 | return RX_CONTINUE; |
| 1194 | |
| 1195 | /* if we are in a service period, do nothing */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1196 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1197 | return RX_CONTINUE; |
| 1198 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1199 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1200 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
| 1201 | else |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1202 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1203 | } |
| 1204 | |
| 1205 | return RX_CONTINUE; |
| 1206 | } |
| 1207 | |
| 1208 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1209 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1210 | { |
| 1211 | struct sta_info *sta = rx->sta; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1212 | struct sk_buff *skb = rx->skb; |
| 1213 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1214 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | ef0621e | 2013-04-22 16:29:31 +0200 | [diff] [blame] | 1215 | int i; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1216 | |
| 1217 | if (!sta) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1218 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1219 | |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1220 | /* |
| 1221 | * Update last_rx only for IBSS packets which are for the current |
Antonio Quartulli | e584da5e | 2012-11-25 23:13:42 +0100 | [diff] [blame] | 1222 | * BSSID and for station already AUTHORIZED to avoid keeping the |
| 1223 | * current IBSS network alive in cases where other STAs start |
| 1224 | * using different BSSID. This will also give the station another |
| 1225 | * chance to restart the authentication/authorization in case |
| 1226 | * something went wrong the first time. |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1227 | */ |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1228 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 1229 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1230 | NL80211_IFTYPE_ADHOC); |
Antonio Quartulli | e584da5e | 2012-11-25 23:13:42 +0100 | [diff] [blame] | 1231 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
| 1232 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1233 | sta->last_rx = jiffies; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1234 | if (ieee80211_is_data(hdr->frame_control)) { |
| 1235 | sta->last_rx_rate_idx = status->rate_idx; |
| 1236 | sta->last_rx_rate_flag = status->flag; |
Emmanuel Grumbach | 1b8d242 | 2014-02-05 16:37:11 +0200 | [diff] [blame] | 1237 | sta->last_rx_rate_vht_flag = status->vht_flag; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 1238 | sta->last_rx_rate_vht_nss = status->vht_nss; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1239 | } |
| 1240 | } |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1241 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
| 1242 | /* |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1243 | * Mesh beacons will update last_rx when if they are found to |
| 1244 | * match the current local configuration when processed. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1245 | */ |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1246 | sta->last_rx = jiffies; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1247 | if (ieee80211_is_data(hdr->frame_control)) { |
| 1248 | sta->last_rx_rate_idx = status->rate_idx; |
| 1249 | sta->last_rx_rate_flag = status->flag; |
Chun-Yeow Yeoh | b8ff416 | 2014-02-27 13:14:14 +0800 | [diff] [blame] | 1250 | sta->last_rx_rate_vht_flag = status->vht_flag; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 1251 | sta->last_rx_rate_vht_nss = status->vht_nss; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1252 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1253 | } |
| 1254 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1255 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1256 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1257 | |
Kalle Valo | 3cf335d | 2009-03-22 21:57:06 +0200 | [diff] [blame] | 1258 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
| 1259 | ieee80211_sta_rx_notify(rx->sdata, hdr); |
| 1260 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1261 | sta->rx_fragments++; |
| 1262 | sta->rx_bytes += rx->skb->len; |
Felix Fietkau | fe8431f | 2012-03-01 18:00:07 +0100 | [diff] [blame] | 1263 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
| 1264 | sta->last_signal = status->signal; |
| 1265 | ewma_add(&sta->avg_signal, -status->signal); |
| 1266 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1267 | |
Felix Fietkau | ef0621e | 2013-04-22 16:29:31 +0200 | [diff] [blame] | 1268 | if (status->chains) { |
| 1269 | sta->chains = status->chains; |
| 1270 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { |
| 1271 | int signal = status->chain_signal[i]; |
| 1272 | |
| 1273 | if (!(status->chains & BIT(i))) |
| 1274 | continue; |
| 1275 | |
| 1276 | sta->chain_signal_last[i] = signal; |
| 1277 | ewma_add(&sta->chain_signal_avg[i], -signal); |
| 1278 | } |
| 1279 | } |
| 1280 | |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1281 | /* |
| 1282 | * Change STA power saving mode only at the end of a frame |
| 1283 | * exchange sequence. |
| 1284 | */ |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1285 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
| 1286 | !ieee80211_has_morefrags(hdr->frame_control) && |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 1287 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1288 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
Johannes Berg | b4ba544 | 2014-01-24 14:41:44 +0100 | [diff] [blame] | 1289 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
| 1290 | /* PM bit is only checked in frames where it isn't reserved, |
| 1291 | * in AP mode it's reserved in non-bufferable management frames |
| 1292 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) |
| 1293 | */ |
| 1294 | (!ieee80211_is_mgmt(hdr->frame_control) || |
| 1295 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1296 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
Johannes Berg | b4ba544 | 2014-01-24 14:41:44 +0100 | [diff] [blame] | 1297 | if (!ieee80211_has_pm(hdr->frame_control)) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1298 | sta_ps_end(sta); |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1299 | } else { |
| 1300 | if (ieee80211_has_pm(hdr->frame_control)) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1301 | sta_ps_start(sta); |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1302 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1303 | } |
| 1304 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 1305 | /* mesh power save support */ |
| 1306 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
| 1307 | ieee80211_mps_rx_h_sta_process(sta, hdr); |
| 1308 | |
Johannes Berg | 22403de | 2009-10-30 12:55:03 +0100 | [diff] [blame] | 1309 | /* |
| 1310 | * Drop (qos-)data::nullfunc frames silently, since they |
| 1311 | * are used only to control station power saving mode. |
| 1312 | */ |
| 1313 | if (ieee80211_is_nullfunc(hdr->frame_control) || |
| 1314 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1315 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1316 | |
| 1317 | /* |
| 1318 | * If we receive a 4-addr nullfunc frame from a STA |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1319 | * that was not moved to a 4-addr STA vlan yet send |
| 1320 | * the event to userspace and for older hostapd drop |
| 1321 | * the frame to the monitor interface. |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1322 | */ |
| 1323 | if (ieee80211_has_a4(hdr->frame_control) && |
| 1324 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
| 1325 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1326 | !rx->sdata->u.vlan.sta))) { |
| 1327 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) |
| 1328 | cfg80211_rx_unexpected_4addr_frame( |
| 1329 | rx->sdata->dev, sta->sta.addr, |
| 1330 | GFP_ATOMIC); |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1331 | return RX_DROP_MONITOR; |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1332 | } |
Johannes Berg | 22403de | 2009-10-30 12:55:03 +0100 | [diff] [blame] | 1333 | /* |
| 1334 | * Update counter and free packet here to avoid |
| 1335 | * counting this as a dropped packed. |
| 1336 | */ |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1337 | sta->rx_packets++; |
| 1338 | dev_kfree_skb(rx->skb); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1339 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1340 | } |
| 1341 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1342 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1343 | } /* ieee80211_rx_h_sta_process */ |
| 1344 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1345 | static ieee80211_rx_result debug_noinline |
| 1346 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) |
| 1347 | { |
| 1348 | struct sk_buff *skb = rx->skb; |
| 1349 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1350 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 1351 | int keyidx; |
| 1352 | int hdrlen; |
| 1353 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
| 1354 | struct ieee80211_key *sta_ptk = NULL; |
| 1355 | int mmie_keyidx = -1; |
| 1356 | __le16 fc; |
Max Stepanov | 2475b1c | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1357 | const struct ieee80211_cipher_scheme *cs = NULL; |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1358 | |
| 1359 | /* |
| 1360 | * Key selection 101 |
| 1361 | * |
| 1362 | * There are four types of keys: |
| 1363 | * - GTK (group keys) |
| 1364 | * - IGTK (group keys for management frames) |
| 1365 | * - PTK (pairwise keys) |
| 1366 | * - STK (station-to-station pairwise keys) |
| 1367 | * |
| 1368 | * When selecting a key, we have to distinguish between multicast |
| 1369 | * (including broadcast) and unicast frames, the latter can only |
| 1370 | * use PTKs and STKs while the former always use GTKs and IGTKs. |
| 1371 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then |
| 1372 | * unicast frames can also use key indices like GTKs. Hence, if we |
| 1373 | * don't have a PTK/STK we check the key index for a WEP key. |
| 1374 | * |
| 1375 | * Note that in a regular BSS, multicast frames are sent by the |
| 1376 | * AP only, associated stations unicast the frame to the AP first |
| 1377 | * which then multicasts it on their behalf. |
| 1378 | * |
| 1379 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
| 1380 | * with each station, that is something we don't currently handle. |
| 1381 | * The spec seems to expect that one negotiates the same key with |
| 1382 | * every station but there's no such requirement; VLANs could be |
| 1383 | * possible. |
| 1384 | */ |
| 1385 | |
| 1386 | /* |
| 1387 | * No point in finding a key and decrypting if the frame is neither |
| 1388 | * addressed to us nor a multicast frame. |
| 1389 | */ |
| 1390 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 1391 | return RX_CONTINUE; |
| 1392 | |
| 1393 | /* start without a key */ |
| 1394 | rx->key = NULL; |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1395 | fc = hdr->frame_control; |
| 1396 | |
Max Stepanov | 2475b1c | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1397 | if (rx->sta) { |
| 1398 | int keyid = rx->sta->ptk_idx; |
| 1399 | |
| 1400 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
| 1401 | cs = rx->sta->cipher_scheme; |
| 1402 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); |
| 1403 | if (unlikely(keyid < 0)) |
| 1404 | return RX_DROP_UNUSABLE; |
| 1405 | } |
| 1406 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); |
| 1407 | } |
| 1408 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1409 | if (!ieee80211_has_protected(fc)) |
| 1410 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); |
| 1411 | |
| 1412 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { |
| 1413 | rx->key = sta_ptk; |
| 1414 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1415 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1416 | return RX_CONTINUE; |
| 1417 | /* Skip decryption if the frame is not protected. */ |
| 1418 | if (!ieee80211_has_protected(fc)) |
| 1419 | return RX_CONTINUE; |
| 1420 | } else if (mmie_keyidx >= 0) { |
| 1421 | /* Broadcast/multicast robust management frame / BIP */ |
| 1422 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1423 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1424 | return RX_CONTINUE; |
| 1425 | |
| 1426 | if (mmie_keyidx < NUM_DEFAULT_KEYS || |
| 1427 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) |
| 1428 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ |
| 1429 | if (rx->sta) |
| 1430 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); |
| 1431 | if (!rx->key) |
| 1432 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); |
| 1433 | } else if (!ieee80211_has_protected(fc)) { |
| 1434 | /* |
| 1435 | * The frame was not protected, so skip decryption. However, we |
| 1436 | * need to set rx->key if there is a key that could have been |
| 1437 | * used so that the frame may be dropped if encryption would |
| 1438 | * have been expected. |
| 1439 | */ |
| 1440 | struct ieee80211_key *key = NULL; |
| 1441 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1442 | int i; |
| 1443 | |
| 1444 | if (ieee80211_is_mgmt(fc) && |
| 1445 | is_multicast_ether_addr(hdr->addr1) && |
| 1446 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) |
| 1447 | rx->key = key; |
| 1448 | else { |
| 1449 | if (rx->sta) { |
| 1450 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
| 1451 | key = rcu_dereference(rx->sta->gtk[i]); |
| 1452 | if (key) |
| 1453 | break; |
| 1454 | } |
| 1455 | } |
| 1456 | if (!key) { |
| 1457 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
| 1458 | key = rcu_dereference(sdata->keys[i]); |
| 1459 | if (key) |
| 1460 | break; |
| 1461 | } |
| 1462 | } |
| 1463 | if (key) |
| 1464 | rx->key = key; |
| 1465 | } |
| 1466 | return RX_CONTINUE; |
| 1467 | } else { |
| 1468 | u8 keyid; |
Max Stepanov | 2475b1c | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1469 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1470 | /* |
| 1471 | * The device doesn't give us the IV so we won't be |
| 1472 | * able to look up the key. That's ok though, we |
| 1473 | * don't need to decrypt the frame, we just won't |
| 1474 | * be able to keep statistics accurate. |
| 1475 | * Except for key threshold notifications, should |
| 1476 | * we somehow allow the driver to tell us which key |
| 1477 | * the hardware used if this flag is set? |
| 1478 | */ |
| 1479 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1480 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1481 | return RX_CONTINUE; |
| 1482 | |
| 1483 | hdrlen = ieee80211_hdrlen(fc); |
| 1484 | |
Max Stepanov | 2475b1c | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1485 | if (cs) { |
| 1486 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1487 | |
Max Stepanov | 2475b1c | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1488 | if (unlikely(keyidx < 0)) |
| 1489 | return RX_DROP_UNUSABLE; |
| 1490 | } else { |
| 1491 | if (rx->skb->len < 8 + hdrlen) |
| 1492 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
| 1493 | /* |
| 1494 | * no need to call ieee80211_wep_get_keyidx, |
| 1495 | * it verifies a bunch of things we've done already |
| 1496 | */ |
| 1497 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); |
| 1498 | keyidx = keyid >> 6; |
| 1499 | } |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1500 | |
| 1501 | /* check per-station GTK first, if multicast packet */ |
| 1502 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) |
| 1503 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); |
| 1504 | |
| 1505 | /* if not found, try default key */ |
| 1506 | if (!rx->key) { |
| 1507 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); |
| 1508 | |
| 1509 | /* |
| 1510 | * RSNA-protected unicast frames should always be |
| 1511 | * sent with pairwise or station-to-station keys, |
| 1512 | * but for WEP we allow using a key index as well. |
| 1513 | */ |
| 1514 | if (rx->key && |
| 1515 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && |
| 1516 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && |
| 1517 | !is_multicast_ether_addr(hdr->addr1)) |
| 1518 | rx->key = NULL; |
| 1519 | } |
| 1520 | } |
| 1521 | |
| 1522 | if (rx->key) { |
| 1523 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) |
| 1524 | return RX_DROP_MONITOR; |
| 1525 | |
| 1526 | rx->key->tx_rx_count++; |
| 1527 | /* TODO: add threshold stuff again */ |
| 1528 | } else { |
| 1529 | return RX_DROP_MONITOR; |
| 1530 | } |
| 1531 | |
| 1532 | switch (rx->key->conf.cipher) { |
| 1533 | case WLAN_CIPHER_SUITE_WEP40: |
| 1534 | case WLAN_CIPHER_SUITE_WEP104: |
| 1535 | result = ieee80211_crypto_wep_decrypt(rx); |
| 1536 | break; |
| 1537 | case WLAN_CIPHER_SUITE_TKIP: |
| 1538 | result = ieee80211_crypto_tkip_decrypt(rx); |
| 1539 | break; |
| 1540 | case WLAN_CIPHER_SUITE_CCMP: |
| 1541 | result = ieee80211_crypto_ccmp_decrypt(rx); |
| 1542 | break; |
| 1543 | case WLAN_CIPHER_SUITE_AES_CMAC: |
| 1544 | result = ieee80211_crypto_aes_cmac_decrypt(rx); |
| 1545 | break; |
| 1546 | default: |
Max Stepanov | 2475b1c | 2013-03-24 14:23:27 +0200 | [diff] [blame] | 1547 | result = ieee80211_crypto_hw_decrypt(rx); |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1548 | } |
| 1549 | |
| 1550 | /* the hdr variable is invalid after the decrypt handlers */ |
| 1551 | |
| 1552 | /* either the frame has been decrypted or will be dropped */ |
| 1553 | status->flag |= RX_FLAG_DECRYPTED; |
| 1554 | |
| 1555 | return result; |
| 1556 | } |
| 1557 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1558 | static inline struct ieee80211_fragment_entry * |
| 1559 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, |
| 1560 | unsigned int frag, unsigned int seq, int rx_queue, |
| 1561 | struct sk_buff **skb) |
| 1562 | { |
| 1563 | struct ieee80211_fragment_entry *entry; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1564 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1565 | entry = &sdata->fragments[sdata->fragment_next++]; |
| 1566 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) |
| 1567 | sdata->fragment_next = 0; |
| 1568 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1569 | if (!skb_queue_empty(&entry->skb_list)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1570 | __skb_queue_purge(&entry->skb_list); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1571 | |
| 1572 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ |
| 1573 | *skb = NULL; |
| 1574 | entry->first_frag_time = jiffies; |
| 1575 | entry->seq = seq; |
| 1576 | entry->rx_queue = rx_queue; |
| 1577 | entry->last_frag = frag; |
| 1578 | entry->ccmp = 0; |
| 1579 | entry->extra_len = 0; |
| 1580 | |
| 1581 | return entry; |
| 1582 | } |
| 1583 | |
| 1584 | static inline struct ieee80211_fragment_entry * |
| 1585 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1586 | unsigned int frag, unsigned int seq, |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1587 | int rx_queue, struct ieee80211_hdr *hdr) |
| 1588 | { |
| 1589 | struct ieee80211_fragment_entry *entry; |
| 1590 | int i, idx; |
| 1591 | |
| 1592 | idx = sdata->fragment_next; |
| 1593 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { |
| 1594 | struct ieee80211_hdr *f_hdr; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1595 | |
| 1596 | idx--; |
| 1597 | if (idx < 0) |
| 1598 | idx = IEEE80211_FRAGMENT_MAX - 1; |
| 1599 | |
| 1600 | entry = &sdata->fragments[idx]; |
| 1601 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || |
| 1602 | entry->rx_queue != rx_queue || |
| 1603 | entry->last_frag + 1 != frag) |
| 1604 | continue; |
| 1605 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1606 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1607 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1608 | /* |
| 1609 | * Check ftype and addresses are equal, else check next fragment |
| 1610 | */ |
| 1611 | if (((hdr->frame_control ^ f_hdr->frame_control) & |
| 1612 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1613 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
| 1614 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1615 | continue; |
| 1616 | |
S.Çağlar Onur | ab46623 | 2008-02-14 17:36:47 +0200 | [diff] [blame] | 1617 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1618 | __skb_queue_purge(&entry->skb_list); |
| 1619 | continue; |
| 1620 | } |
| 1621 | return entry; |
| 1622 | } |
| 1623 | |
| 1624 | return NULL; |
| 1625 | } |
| 1626 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1627 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1628 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1629 | { |
| 1630 | struct ieee80211_hdr *hdr; |
| 1631 | u16 sc; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1632 | __le16 fc; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1633 | unsigned int frag, seq; |
| 1634 | struct ieee80211_fragment_entry *entry; |
| 1635 | struct sk_buff *skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1636 | struct ieee80211_rx_status *status; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1637 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1638 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1639 | fc = hdr->frame_control; |
Javier Cardona | f7fbf70 | 2012-10-25 11:10:18 -0700 | [diff] [blame] | 1640 | |
| 1641 | if (ieee80211_is_ctl(fc)) |
| 1642 | return RX_CONTINUE; |
| 1643 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1644 | sc = le16_to_cpu(hdr->seq_ctrl); |
| 1645 | frag = sc & IEEE80211_SCTL_FRAG; |
| 1646 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1647 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1648 | is_multicast_ether_addr(hdr->addr1))) { |
| 1649 | /* not fragmented */ |
| 1650 | goto out; |
| 1651 | } |
| 1652 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
| 1653 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 1654 | if (skb_linearize(rx->skb)) |
| 1655 | return RX_DROP_UNUSABLE; |
| 1656 | |
Abhijeet Kolekar | 058897a | 2010-05-11 11:22:11 -0700 | [diff] [blame] | 1657 | /* |
| 1658 | * skb_linearize() might change the skb->data and |
| 1659 | * previously cached variables (in this case, hdr) need to |
| 1660 | * be refreshed with the new data. |
| 1661 | */ |
| 1662 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1663 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
| 1664 | |
| 1665 | if (frag == 0) { |
| 1666 | /* This is the first fragment of a new frame. */ |
| 1667 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1668 | rx->seqno_idx, &(rx->skb)); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1669 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1670 | ieee80211_has_protected(fc)) { |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1671 | int queue = rx->security_idx; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1672 | /* Store CCMP PN so that we can verify that the next |
| 1673 | * fragment has a sequential PN value. */ |
| 1674 | entry->ccmp = 1; |
| 1675 | memcpy(entry->last_pn, |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1676 | rx->key->u.ccmp.rx_pn[queue], |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1677 | IEEE80211_CCMP_PN_LEN); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1678 | } |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1679 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1680 | } |
| 1681 | |
| 1682 | /* This is a fragment for a frame that should already be pending in |
| 1683 | * fragment cache. Add this fragment to the end of the pending entry. |
| 1684 | */ |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1685 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
| 1686 | rx->seqno_idx, hdr); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1687 | if (!entry) { |
| 1688 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1689 | return RX_DROP_MONITOR; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1690 | } |
| 1691 | |
| 1692 | /* Verify that MPDUs within one MSDU have sequential PN values. |
| 1693 | * (IEEE 802.11i, 8.3.3.4.5) */ |
| 1694 | if (entry->ccmp) { |
| 1695 | int i; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1696 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1697 | int queue; |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1698 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1699 | return RX_DROP_UNUSABLE; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1700 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
| 1701 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1702 | pn[i]++; |
| 1703 | if (pn[i]) |
| 1704 | break; |
| 1705 | } |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1706 | queue = rx->security_idx; |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1707 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1708 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1709 | return RX_DROP_UNUSABLE; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1710 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1711 | } |
| 1712 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1713 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1714 | __skb_queue_tail(&entry->skb_list, rx->skb); |
| 1715 | entry->last_frag = frag; |
| 1716 | entry->extra_len += rx->skb->len; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1717 | if (ieee80211_has_morefrags(fc)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1718 | rx->skb = NULL; |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1719 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1720 | } |
| 1721 | |
| 1722 | rx->skb = __skb_dequeue(&entry->skb_list); |
| 1723 | if (skb_tailroom(rx->skb) < entry->extra_len) { |
| 1724 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); |
| 1725 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, |
| 1726 | GFP_ATOMIC))) { |
| 1727 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); |
| 1728 | __skb_queue_purge(&entry->skb_list); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1729 | return RX_DROP_UNUSABLE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1730 | } |
| 1731 | } |
| 1732 | while ((skb = __skb_dequeue(&entry->skb_list))) { |
| 1733 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); |
| 1734 | dev_kfree_skb(skb); |
| 1735 | } |
| 1736 | |
| 1737 | /* Complete frame has been reassembled - process it now */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1738 | status = IEEE80211_SKB_RXCB(rx->skb); |
| 1739 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1740 | |
| 1741 | out: |
| 1742 | if (rx->sta) |
| 1743 | rx->sta->rx_packets++; |
| 1744 | if (is_multicast_ether_addr(hdr->addr1)) |
| 1745 | rx->local->dot11MulticastReceivedFrameCount++; |
| 1746 | else |
| 1747 | ieee80211_led_rx(rx->local); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1748 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1749 | } |
| 1750 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1751 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1752 | { |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1753 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1754 | return -EACCES; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1755 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1756 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1757 | } |
| 1758 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1759 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1760 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1761 | struct sk_buff *skb = rx->skb; |
| 1762 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1763 | |
Johannes Berg | 3017b80 | 2007-08-28 17:01:53 -0400 | [diff] [blame] | 1764 | /* |
Johannes Berg | 7848ba7 | 2007-09-14 11:10:25 -0400 | [diff] [blame] | 1765 | * Pass through unencrypted frames if the hardware has |
| 1766 | * decrypted them already. |
Johannes Berg | 3017b80 | 2007-08-28 17:01:53 -0400 | [diff] [blame] | 1767 | */ |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1768 | if (status->flag & RX_FLAG_DECRYPTED) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1769 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1770 | |
| 1771 | /* Drop unencrypted frames if key is set. */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1772 | if (unlikely(!ieee80211_has_protected(fc) && |
| 1773 | !ieee80211_is_nullfunc(fc) && |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1774 | ieee80211_is_data(fc) && |
Jouni Malinen | 3cfcf6a | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 1775 | (rx->key || rx->sdata->drop_unencrypted))) |
| 1776 | return -EACCES; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1777 | |
| 1778 | return 0; |
| 1779 | } |
| 1780 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1781 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1782 | { |
| 1783 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Jouni Malinen | e3efca0 | 2010-03-28 22:31:15 -0700 | [diff] [blame] | 1784 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1785 | __le16 fc = hdr->frame_control; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1786 | |
Jouni Malinen | e3efca0 | 2010-03-28 22:31:15 -0700 | [diff] [blame] | 1787 | /* |
| 1788 | * Pass through unencrypted frames if the hardware has |
| 1789 | * decrypted them already. |
| 1790 | */ |
| 1791 | if (status->flag & RX_FLAG_DECRYPTED) |
| 1792 | return 0; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1793 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1794 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
Jouni Malinen | d211e90 | 2010-03-28 22:29:52 -0700 | [diff] [blame] | 1795 | if (unlikely(!ieee80211_has_protected(fc) && |
| 1796 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1797 | rx->key)) { |
Johannes Berg | 6ff57cf | 2013-05-16 00:55:00 +0200 | [diff] [blame] | 1798 | if (ieee80211_is_deauth(fc) || |
| 1799 | ieee80211_is_disassoc(fc)) |
| 1800 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, |
| 1801 | rx->skb->data, |
| 1802 | rx->skb->len); |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1803 | return -EACCES; |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1804 | } |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1805 | /* BIP does not use Protected field, so need to check MMIE */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1806 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1807 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
Johannes Berg | 6ff57cf | 2013-05-16 00:55:00 +0200 | [diff] [blame] | 1808 | if (ieee80211_is_deauth(fc) || |
| 1809 | ieee80211_is_disassoc(fc)) |
| 1810 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, |
| 1811 | rx->skb->data, |
| 1812 | rx->skb->len); |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1813 | return -EACCES; |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1814 | } |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1815 | /* |
| 1816 | * When using MFP, Action frames are not allowed prior to |
| 1817 | * having configured keys. |
| 1818 | */ |
| 1819 | if (unlikely(ieee80211_is_action(fc) && !rx->key && |
Johannes Berg | d8ca16d | 2014-01-23 16:20:29 +0100 | [diff] [blame] | 1820 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1821 | return -EACCES; |
| 1822 | } |
Johannes Berg | b3fc9c6 | 2008-04-13 10:12:47 +0200 | [diff] [blame] | 1823 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1824 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1825 | } |
| 1826 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1827 | static int |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1828 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1829 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1830 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1831 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1832 | bool check_port_control = false; |
| 1833 | struct ethhdr *ehdr; |
| 1834 | int ret; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1835 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1836 | *port_control = false; |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1837 | if (ieee80211_has_a4(hdr->frame_control) && |
| 1838 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1839 | return -1; |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1840 | |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1841 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
| 1842 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { |
| 1843 | |
| 1844 | if (!sdata->u.mgd.use_4addr) |
| 1845 | return -1; |
| 1846 | else |
| 1847 | check_port_control = true; |
| 1848 | } |
| 1849 | |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1850 | if (is_multicast_ether_addr(hdr->addr1) && |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1851 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1852 | return -1; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1853 | |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1854 | 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] | 1855 | if (ret < 0) |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1856 | return ret; |
| 1857 | |
| 1858 | ehdr = (struct ethhdr *) rx->skb->data; |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1859 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
| 1860 | *port_control = true; |
| 1861 | else if (check_port_control) |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1862 | return -1; |
| 1863 | |
| 1864 | return 0; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1865 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1866 | |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1867 | /* |
| 1868 | * requires that rx->skb is a frame with ethernet header |
| 1869 | */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1870 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1871 | { |
Senthil Balasubramanian | c97c23e | 2008-05-28 23:15:32 +0530 | [diff] [blame] | 1872 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1873 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
| 1874 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
| 1875 | |
| 1876 | /* |
| 1877 | * Allow EAPOL frames to us/the PAE group address regardless |
| 1878 | * of whether the frame was encrypted or not. |
| 1879 | */ |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 1880 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
Joe Perches | 3bc7945 | 2012-05-08 18:56:53 +0000 | [diff] [blame] | 1881 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
| 1882 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1883 | return true; |
| 1884 | |
| 1885 | if (ieee80211_802_1x_port_control(rx) || |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1886 | ieee80211_drop_unencrypted(rx, fc)) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1887 | return false; |
| 1888 | |
| 1889 | return true; |
| 1890 | } |
| 1891 | |
| 1892 | /* |
| 1893 | * requires that rx->skb is a frame with ethernet header |
| 1894 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1895 | static void |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1896 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1897 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1898 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1899 | struct net_device *dev = sdata->dev; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1900 | struct sk_buff *skb, *xmit_skb; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1901 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
| 1902 | struct sta_info *dsta; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1903 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1904 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1905 | skb = rx->skb; |
| 1906 | xmit_skb = NULL; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1907 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1908 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
| 1909 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
Johannes Berg | 213cd11 | 2008-09-11 00:01:54 +0200 | [diff] [blame] | 1910 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1911 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1912 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1913 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
| 1914 | /* |
| 1915 | * send multicast frames both to higher layers in |
| 1916 | * local net stack and back to the wireless medium |
| 1917 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1918 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1919 | if (!xmit_skb) |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1920 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1921 | dev->name); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1922 | } else { |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 1923 | dsta = sta_info_get(sdata, skb->data); |
| 1924 | if (dsta) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1925 | /* |
| 1926 | * The destination station is associated to |
| 1927 | * this AP (in this VLAN), so send the frame |
| 1928 | * directly to it and do not pass it to local |
| 1929 | * net stack. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1930 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1931 | xmit_skb = skb; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1932 | skb = NULL; |
| 1933 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1934 | } |
| 1935 | } |
| 1936 | |
Kalle Valo | 59d9cb0 | 2009-12-17 13:54:57 +0100 | [diff] [blame] | 1937 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1938 | if (skb) { |
| 1939 | /* 'align' will only take the values 0 or 2 here since all |
| 1940 | * frames are required to be aligned to 2-byte boundaries |
| 1941 | * when being passed to mac80211; the code here works just |
| 1942 | * as well if that isn't true, but mac80211 assumes it can |
| 1943 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1944 | */ |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1945 | int align; |
| 1946 | |
| 1947 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1948 | if (align) { |
| 1949 | if (WARN_ON(skb_headroom(skb) < 3)) { |
| 1950 | dev_kfree_skb(skb); |
| 1951 | skb = NULL; |
| 1952 | } else { |
| 1953 | u8 *data = skb->data; |
Zhu Yi | 8ce0b58 | 2009-10-28 13:13:52 -0700 | [diff] [blame] | 1954 | size_t len = skb_headlen(skb); |
| 1955 | skb->data -= align; |
| 1956 | memmove(skb->data, data, len); |
| 1957 | skb_set_tail_pointer(skb, len); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1958 | } |
| 1959 | } |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1960 | } |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1961 | #endif |
| 1962 | |
Johannes Berg | 9e890a1f | 2013-12-04 09:16:31 +0100 | [diff] [blame] | 1963 | if (skb) { |
| 1964 | /* deliver to local stack */ |
| 1965 | skb->protocol = eth_type_trans(skb, dev); |
| 1966 | memset(skb->cb, 0, sizeof(skb->cb)); |
Johannes Berg | 06d181a | 2014-02-04 20:51:09 +0100 | [diff] [blame] | 1967 | if (rx->local->napi) |
| 1968 | napi_gro_receive(rx->local->napi, skb); |
| 1969 | else |
| 1970 | netif_receive_skb(skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1971 | } |
| 1972 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1973 | if (xmit_skb) { |
Helmut Schaa | aef6c92 | 2011-12-21 09:11:35 +0100 | [diff] [blame] | 1974 | /* |
| 1975 | * Send to wireless media and increase priority by 256 to |
| 1976 | * keep the received priority instead of reclassifying |
| 1977 | * the frame (see cfg80211_classify8021d). |
| 1978 | */ |
| 1979 | xmit_skb->priority += 256; |
YOSHIFUJI Hideaki | f831e90 | 2007-12-12 03:54:23 +0900 | [diff] [blame] | 1980 | xmit_skb->protocol = htons(ETH_P_802_3); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1981 | skb_reset_network_header(xmit_skb); |
| 1982 | skb_reset_mac_header(xmit_skb); |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1983 | dev_queue_xmit(xmit_skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1984 | } |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1985 | } |
| 1986 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1987 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1988 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 1989 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1990 | struct net_device *dev = rx->sdata->dev; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 1991 | struct sk_buff *skb = rx->skb; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1992 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 1993 | __le16 fc = hdr->frame_control; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 1994 | struct sk_buff_head frame_list; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1995 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 1996 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1997 | if (unlikely(!ieee80211_is_data(fc))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1998 | return RX_CONTINUE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 1999 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2000 | if (unlikely(!ieee80211_is_data_present(fc))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2001 | return RX_DROP_MONITOR; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2002 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2003 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2004 | return RX_CONTINUE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2005 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2006 | if (ieee80211_has_a4(hdr->frame_control) && |
| 2007 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2008 | !rx->sdata->u.vlan.sta) |
| 2009 | return RX_DROP_UNUSABLE; |
| 2010 | |
| 2011 | if (is_multicast_ether_addr(hdr->addr1) && |
| 2012 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2013 | rx->sdata->u.vlan.sta) || |
| 2014 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && |
| 2015 | rx->sdata->u.mgd.use_4addr))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2016 | return RX_DROP_UNUSABLE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2017 | |
| 2018 | skb->dev = dev; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2019 | __skb_queue_head_init(&frame_list); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2020 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 2021 | if (skb_linearize(skb)) |
| 2022 | return RX_DROP_UNUSABLE; |
| 2023 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2024 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
| 2025 | rx->sdata->vif.type, |
Yogesh Ashok Powar | 8b3beca | 2011-05-13 11:22:31 -0700 | [diff] [blame] | 2026 | rx->local->hw.extra_tx_headroom, true); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2027 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2028 | while (!skb_queue_empty(&frame_list)) { |
| 2029 | rx->skb = __skb_dequeue(&frame_list); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2030 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2031 | if (!ieee80211_frame_allowed(rx, fc)) { |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2032 | dev_kfree_skb(rx->skb); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2033 | continue; |
| 2034 | } |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2035 | dev->stats.rx_packets++; |
| 2036 | dev->stats.rx_bytes += rx->skb->len; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2037 | |
| 2038 | ieee80211_deliver_skb(rx); |
| 2039 | } |
| 2040 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2041 | return RX_QUEUED; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2042 | } |
| 2043 | |
Ingo Molnar | bf94e17 | 2008-10-12 23:51:38 -0700 | [diff] [blame] | 2044 | #ifdef CONFIG_MAC80211_MESH |
Davide Pesavento | b0dee57 | 2008-09-27 17:29:12 +0200 | [diff] [blame] | 2045 | static ieee80211_rx_result |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2046 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
| 2047 | { |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2048 | struct ieee80211_hdr *fwd_hdr, *hdr; |
| 2049 | struct ieee80211_tx_info *info; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2050 | struct ieee80211s_hdr *mesh_hdr; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2051 | struct sk_buff *skb = rx->skb, *fwd_skb; |
Johannes Berg | 3b8d81e | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2052 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2053 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2054 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2055 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2056 | u16 q, hdrlen; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2057 | |
| 2058 | hdr = (struct ieee80211_hdr *) skb->data; |
| 2059 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2060 | |
| 2061 | /* make sure fixed part of mesh header is there, also checks skb len */ |
| 2062 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) |
| 2063 | return RX_DROP_MONITOR; |
| 2064 | |
| 2065 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| 2066 | |
| 2067 | /* make sure full mesh header is there, also checks skb len */ |
| 2068 | if (!pskb_may_pull(rx->skb, |
| 2069 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) |
| 2070 | return RX_DROP_MONITOR; |
| 2071 | |
| 2072 | /* reload pointers */ |
| 2073 | hdr = (struct ieee80211_hdr *) skb->data; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2074 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| 2075 | |
Thomas Pedersen | 2157fdd | 2011-09-01 12:32:14 -0700 | [diff] [blame] | 2076 | /* frame is in RMC, don't forward */ |
| 2077 | if (ieee80211_is_data(hdr->frame_control) && |
| 2078 | is_multicast_ether_addr(hdr->addr1) && |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2079 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
Thomas Pedersen | 2157fdd | 2011-09-01 12:32:14 -0700 | [diff] [blame] | 2080 | return RX_DROP_MONITOR; |
| 2081 | |
Javier Cardona | 555cb71 | 2012-10-24 12:43:30 -0700 | [diff] [blame] | 2082 | if (!ieee80211_is_data(hdr->frame_control) || |
| 2083 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2084 | return RX_CONTINUE; |
| 2085 | |
| 2086 | if (!mesh_hdr->ttl) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2087 | return RX_DROP_MONITOR; |
| 2088 | |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2089 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2090 | struct mesh_path *mppath; |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2091 | char *proxied_addr; |
| 2092 | char *mpp_addr; |
| 2093 | |
| 2094 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 2095 | mpp_addr = hdr->addr3; |
| 2096 | proxied_addr = mesh_hdr->eaddr1; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2097 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
| 2098 | /* has_a4 already checked in ieee80211_rx_mesh_check */ |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2099 | mpp_addr = hdr->addr4; |
| 2100 | proxied_addr = mesh_hdr->eaddr2; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2101 | } else { |
| 2102 | return RX_DROP_MONITOR; |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2103 | } |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2104 | |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2105 | rcu_read_lock(); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2106 | mppath = mpp_path_lookup(sdata, proxied_addr); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2107 | if (!mppath) { |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2108 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2109 | } else { |
| 2110 | spin_lock_bh(&mppath->state_lock); |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2111 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2112 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2113 | spin_unlock_bh(&mppath->state_lock); |
| 2114 | } |
| 2115 | rcu_read_unlock(); |
| 2116 | } |
| 2117 | |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2118 | /* Frame has reached destination. Don't forward */ |
| 2119 | if (!is_multicast_ether_addr(hdr->addr1) && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2120 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2121 | return RX_CONTINUE; |
| 2122 | |
Yoni Divinsky | 00e96de | 2012-06-20 15:39:13 +0300 | [diff] [blame] | 2123 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
Thomas Pedersen | d3c1597 | 2011-11-24 17:15:23 -0800 | [diff] [blame] | 2124 | if (ieee80211_queue_stopped(&local->hw, q)) { |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2125 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
Thomas Pedersen | d3c1597 | 2011-11-24 17:15:23 -0800 | [diff] [blame] | 2126 | return RX_DROP_MONITOR; |
| 2127 | } |
| 2128 | skb_set_queue_mapping(skb, q); |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2129 | |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2130 | if (!--mesh_hdr->ttl) { |
| 2131 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); |
Javier Cardona | 2ac64cd | 2012-10-24 12:43:31 -0700 | [diff] [blame] | 2132 | goto out; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2133 | } |
| 2134 | |
Chun-Yeow Yeoh | d665508 | 2012-03-02 02:03:19 +0800 | [diff] [blame] | 2135 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
| 2136 | goto out; |
| 2137 | |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2138 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
| 2139 | if (!fwd_skb) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 2140 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2141 | sdata->name); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2142 | goto out; |
| 2143 | } |
| 2144 | |
| 2145 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; |
Thomas Pedersen | 9d6d6f4 | 2013-04-08 11:06:12 -0700 | [diff] [blame] | 2146 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2147 | info = IEEE80211_SKB_CB(fwd_skb); |
| 2148 | memset(info, 0, sizeof(*info)); |
| 2149 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
| 2150 | info->control.vif = &rx->sdata->vif; |
| 2151 | info->control.jiffies = jiffies; |
| 2152 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { |
| 2153 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); |
| 2154 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2155 | /* update power mode indication when forwarding */ |
| 2156 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2157 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2158 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2159 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
| 2160 | } else { |
| 2161 | /* unable to resolve next hop */ |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2162 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
Chun-Yeow Yeoh | f63f842 | 2013-11-13 15:39:12 +0800 | [diff] [blame] | 2163 | fwd_hdr->addr3, 0, |
| 2164 | WLAN_REASON_MESH_PATH_NOFORWARD, |
| 2165 | fwd_hdr->addr2); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2166 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
Jesper Juhl | 74b8cc3 | 2012-01-14 21:52:17 +0100 | [diff] [blame] | 2167 | kfree_skb(fwd_skb); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2168 | return RX_DROP_MONITOR; |
| 2169 | } |
| 2170 | |
| 2171 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
| 2172 | ieee80211_add_pending_skb(local, fwd_skb); |
Johannes Berg | b51aff0 | 2010-12-22 10:15:07 +0100 | [diff] [blame] | 2173 | out: |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2174 | if (is_multicast_ether_addr(hdr->addr1) || |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2175 | sdata->dev->flags & IFF_PROMISC) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2176 | return RX_CONTINUE; |
| 2177 | else |
| 2178 | return RX_DROP_MONITOR; |
| 2179 | } |
Ingo Molnar | bf94e17 | 2008-10-12 23:51:38 -0700 | [diff] [blame] | 2180 | #endif |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2181 | |
| 2182 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2183 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2184 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2185 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Vivek Natarajan | e15276a | 2010-02-08 17:47:01 +0530 | [diff] [blame] | 2186 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2187 | struct net_device *dev = sdata->dev; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2188 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
| 2189 | __le16 fc = hdr->frame_control; |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2190 | bool port_control; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2191 | int err; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2192 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2193 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2194 | return RX_CONTINUE; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2195 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2196 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2197 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2198 | |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2199 | /* |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2200 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
| 2201 | * also drop the frame to cooked monitor interfaces. |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2202 | */ |
| 2203 | if (ieee80211_has_a4(hdr->frame_control) && |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2204 | sdata->vif.type == NL80211_IFTYPE_AP) { |
| 2205 | if (rx->sta && |
| 2206 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) |
| 2207 | cfg80211_rx_unexpected_4addr_frame( |
| 2208 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2209 | return RX_DROP_MONITOR; |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2210 | } |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2211 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2212 | err = __ieee80211_data_to_8023(rx, &port_control); |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2213 | if (unlikely(err)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2214 | return RX_DROP_UNUSABLE; |
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 (!ieee80211_frame_allowed(rx, fc)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2217 | return RX_DROP_MONITOR; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2218 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2219 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2220 | unlikely(port_control) && sdata->bss) { |
| 2221 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
| 2222 | u.ap); |
| 2223 | dev = sdata->dev; |
| 2224 | rx->sdata = sdata; |
| 2225 | } |
| 2226 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2227 | rx->skb->dev = dev; |
| 2228 | |
| 2229 | dev->stats.rx_packets++; |
| 2230 | dev->stats.rx_bytes += rx->skb->len; |
| 2231 | |
Helmut Schaa | 08ca944 | 2010-11-30 12:19:34 +0100 | [diff] [blame] | 2232 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
Rajkumar Manoharan | 8c99f69 | 2011-02-02 22:57:53 +0530 | [diff] [blame] | 2233 | !is_multicast_ether_addr( |
| 2234 | ((struct ethhdr *)rx->skb->data)->h_dest) && |
| 2235 | (!local->scanning && |
| 2236 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { |
Vivek Natarajan | e15276a | 2010-02-08 17:47:01 +0530 | [diff] [blame] | 2237 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 2238 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); |
| 2239 | } |
| 2240 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2241 | ieee80211_deliver_skb(rx); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2242 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2243 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2244 | } |
| 2245 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2246 | static ieee80211_rx_result debug_noinline |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2247 | 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] | 2248 | { |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2249 | struct sk_buff *skb = rx->skb; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2250 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2251 | struct tid_ampdu_rx *tid_agg_rx; |
| 2252 | u16 start_seq_num; |
| 2253 | u16 tid; |
| 2254 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2255 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2256 | return RX_CONTINUE; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2257 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2258 | if (ieee80211_is_back_req(bar->frame_control)) { |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2259 | struct { |
| 2260 | __le16 control, start_seq_num; |
| 2261 | } __packed bar_data; |
| 2262 | |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2263 | if (!rx->sta) |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2264 | return RX_DROP_MONITOR; |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2265 | |
| 2266 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), |
| 2267 | &bar_data, sizeof(bar_data))) |
| 2268 | return RX_DROP_MONITOR; |
| 2269 | |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2270 | tid = le16_to_cpu(bar_data.control) >> 12; |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 2271 | |
| 2272 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); |
| 2273 | if (!tid_agg_rx) |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2274 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2275 | |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2276 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2277 | |
| 2278 | /* reset session timer */ |
Johannes Berg | 20ad19d | 2009-02-10 21:25:45 +0100 | [diff] [blame] | 2279 | if (tid_agg_rx->timeout) |
| 2280 | mod_timer(&tid_agg_rx->session_timer, |
| 2281 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2282 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 2283 | spin_lock(&tid_agg_rx->reorder_lock); |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2284 | /* release stored frames up to start of BAR */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 2285 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2286 | start_seq_num, frames); |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 2287 | spin_unlock(&tid_agg_rx->reorder_lock); |
| 2288 | |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2289 | kfree_skb(skb); |
| 2290 | return RX_QUEUED; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2291 | } |
| 2292 | |
Johannes Berg | 08daeca | 2010-05-30 14:53:43 +0200 | [diff] [blame] | 2293 | /* |
| 2294 | * After this point, we only want management frames, |
| 2295 | * so we can drop all remaining control frames to |
| 2296 | * cooked monitor interfaces. |
| 2297 | */ |
| 2298 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2299 | } |
| 2300 | |
Jouni Malinen | f4f727a | 2009-01-10 11:46:53 +0200 | [diff] [blame] | 2301 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
| 2302 | struct ieee80211_mgmt *mgmt, |
| 2303 | size_t len) |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2304 | { |
| 2305 | struct ieee80211_local *local = sdata->local; |
| 2306 | struct sk_buff *skb; |
| 2307 | struct ieee80211_mgmt *resp; |
| 2308 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2309 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2310 | /* Not to own unicast address */ |
| 2311 | return; |
| 2312 | } |
| 2313 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2314 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
| 2315 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2316 | /* Not from the current AP or not associated yet. */ |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2317 | return; |
| 2318 | } |
| 2319 | |
| 2320 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { |
| 2321 | /* Too short SA Query request frame */ |
| 2322 | return; |
| 2323 | } |
| 2324 | |
| 2325 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); |
| 2326 | if (skb == NULL) |
| 2327 | return; |
| 2328 | |
| 2329 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 2330 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 2331 | memset(resp, 0, 24); |
| 2332 | memcpy(resp->da, mgmt->sa, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2333 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2334 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2335 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 2336 | IEEE80211_STYPE_ACTION); |
| 2337 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); |
| 2338 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; |
| 2339 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; |
| 2340 | memcpy(resp->u.action.u.sa_query.trans_id, |
| 2341 | mgmt->u.action.u.sa_query.trans_id, |
| 2342 | WLAN_SA_QUERY_TR_ID_LEN); |
| 2343 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 2344 | ieee80211_tx_skb(sdata, skb); |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2345 | } |
| 2346 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2347 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2348 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) |
| 2349 | { |
| 2350 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2351 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2352 | |
| 2353 | /* |
| 2354 | * From here on, look only at management frames. |
| 2355 | * Data and control frames are already handled, |
| 2356 | * and unknown (reserved) frames are useless. |
| 2357 | */ |
| 2358 | if (rx->skb->len < 24) |
| 2359 | return RX_DROP_MONITOR; |
| 2360 | |
| 2361 | if (!ieee80211_is_mgmt(mgmt->frame_control)) |
| 2362 | return RX_DROP_MONITOR; |
| 2363 | |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2364 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 2365 | ieee80211_is_beacon(mgmt->frame_control) && |
| 2366 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2367 | int sig = 0; |
| 2368 | |
| 2369 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
| 2370 | sig = status->signal; |
| 2371 | |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2372 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
| 2373 | rx->skb->data, rx->skb->len, |
Ben Greear | 37c73b5 | 2012-10-26 14:49:25 -0700 | [diff] [blame] | 2374 | status->freq, sig); |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2375 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
| 2376 | } |
| 2377 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2378 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2379 | return RX_DROP_MONITOR; |
| 2380 | |
| 2381 | if (ieee80211_drop_unencrypted_mgmt(rx)) |
| 2382 | return RX_DROP_UNUSABLE; |
| 2383 | |
| 2384 | return RX_CONTINUE; |
| 2385 | } |
| 2386 | |
| 2387 | static ieee80211_rx_result debug_noinline |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2388 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) |
| 2389 | { |
| 2390 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2391 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2392 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2393 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2394 | int len = rx->skb->len; |
| 2395 | |
| 2396 | if (!ieee80211_is_action(mgmt->frame_control)) |
| 2397 | return RX_CONTINUE; |
| 2398 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2399 | /* drop too small frames */ |
| 2400 | if (len < IEEE80211_MIN_ACTION_SIZE) |
| 2401 | return RX_DROP_UNUSABLE; |
| 2402 | |
Marco Porsch | 815b809 | 2012-12-05 15:04:26 -0800 | [diff] [blame] | 2403 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2404 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
| 2405 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2406 | return RX_DROP_UNUSABLE; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2407 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2408 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2409 | return RX_DROP_UNUSABLE; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2410 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2411 | switch (mgmt->u.action.category) { |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2412 | case WLAN_CATEGORY_HT: |
| 2413 | /* reject HT action frames from stations not supporting HT */ |
| 2414 | if (!rx->sta->sta.ht_cap.ht_supported) |
| 2415 | goto invalid; |
| 2416 | |
| 2417 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 2418 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
| 2419 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 2420 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2421 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 2422 | break; |
| 2423 | |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2424 | /* verify action & smps_control/chanwidth are present */ |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2425 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
| 2426 | goto invalid; |
| 2427 | |
| 2428 | switch (mgmt->u.action.u.ht_smps.action) { |
| 2429 | case WLAN_HT_ACTION_SMPS: { |
| 2430 | struct ieee80211_supported_band *sband; |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2431 | enum ieee80211_smps_mode smps_mode; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2432 | |
| 2433 | /* convert to HT capability */ |
| 2434 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
| 2435 | case WLAN_HT_SMPS_CONTROL_DISABLED: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2436 | smps_mode = IEEE80211_SMPS_OFF; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2437 | break; |
| 2438 | case WLAN_HT_SMPS_CONTROL_STATIC: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2439 | smps_mode = IEEE80211_SMPS_STATIC; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2440 | break; |
| 2441 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2442 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2443 | break; |
| 2444 | default: |
| 2445 | goto invalid; |
| 2446 | } |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2447 | |
| 2448 | /* if no change do nothing */ |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2449 | if (rx->sta->sta.smps_mode == smps_mode) |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2450 | goto handled; |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2451 | rx->sta->sta.smps_mode = smps_mode; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2452 | |
| 2453 | sband = rx->local->hw.wiphy->bands[status->band]; |
| 2454 | |
Johannes Berg | 64f68e5 | 2012-03-28 10:58:37 +0200 | [diff] [blame] | 2455 | rate_control_rate_update(local, sband, rx->sta, |
| 2456 | IEEE80211_RC_SMPS_CHANGED); |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2457 | goto handled; |
| 2458 | } |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2459 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
| 2460 | struct ieee80211_supported_band *sband; |
| 2461 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2462 | enum ieee80211_sta_rx_bandwidth new_bw; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2463 | |
| 2464 | /* If it doesn't support 40 MHz it can't change ... */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2465 | if (!(rx->sta->sta.ht_cap.cap & |
| 2466 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2467 | goto handled; |
| 2468 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2469 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
| 2470 | new_bw = IEEE80211_STA_RX_BW_20; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2471 | else |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2472 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); |
| 2473 | |
| 2474 | if (rx->sta->sta.bandwidth == new_bw) |
| 2475 | goto handled; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2476 | |
| 2477 | sband = rx->local->hw.wiphy->bands[status->band]; |
| 2478 | |
| 2479 | rate_control_rate_update(local, sband, rx->sta, |
| 2480 | IEEE80211_RC_BW_CHANGED); |
| 2481 | goto handled; |
| 2482 | } |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2483 | default: |
| 2484 | goto invalid; |
| 2485 | } |
| 2486 | |
| 2487 | break; |
Johannes Berg | 1b3a2e4 | 2013-03-26 15:17:18 +0100 | [diff] [blame] | 2488 | case WLAN_CATEGORY_PUBLIC: |
| 2489 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2490 | goto invalid; |
| 2491 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2492 | break; |
| 2493 | if (!rx->sta) |
| 2494 | break; |
| 2495 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) |
| 2496 | break; |
| 2497 | if (mgmt->u.action.u.ext_chan_switch.action_code != |
| 2498 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) |
| 2499 | break; |
| 2500 | if (len < offsetof(struct ieee80211_mgmt, |
| 2501 | u.action.u.ext_chan_switch.variable)) |
| 2502 | goto invalid; |
| 2503 | goto queue; |
Johannes Berg | 0af83d3 | 2012-12-27 18:55:36 +0100 | [diff] [blame] | 2504 | case WLAN_CATEGORY_VHT: |
| 2505 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 2506 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
| 2507 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 2508 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2509 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 2510 | break; |
| 2511 | |
| 2512 | /* verify action code is present */ |
| 2513 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2514 | goto invalid; |
| 2515 | |
| 2516 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { |
| 2517 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { |
| 2518 | u8 opmode; |
| 2519 | |
| 2520 | /* verify opmode is present */ |
| 2521 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
| 2522 | goto invalid; |
| 2523 | |
| 2524 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; |
| 2525 | |
| 2526 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, |
Johannes Berg | bee7f58 | 2013-02-07 22:24:55 +0100 | [diff] [blame] | 2527 | opmode, status->band, |
| 2528 | false); |
Johannes Berg | 0af83d3 | 2012-12-27 18:55:36 +0100 | [diff] [blame] | 2529 | goto handled; |
| 2530 | } |
| 2531 | default: |
| 2532 | break; |
| 2533 | } |
| 2534 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2535 | case WLAN_CATEGORY_BACK: |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2536 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 2537 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2538 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 2539 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2540 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2541 | break; |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2542 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2543 | /* verify action_code is present */ |
| 2544 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2545 | break; |
| 2546 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2547 | switch (mgmt->u.action.u.addba_req.action_code) { |
| 2548 | case WLAN_ACTION_ADDBA_REQ: |
| 2549 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2550 | sizeof(mgmt->u.action.u.addba_req))) |
Johannes Berg | bed7ee6 | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2551 | goto invalid; |
| 2552 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2553 | case WLAN_ACTION_ADDBA_RESP: |
| 2554 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2555 | sizeof(mgmt->u.action.u.addba_resp))) |
Johannes Berg | bed7ee6 | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2556 | goto invalid; |
| 2557 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2558 | case WLAN_ACTION_DELBA: |
| 2559 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2560 | sizeof(mgmt->u.action.u.delba))) |
Johannes Berg | bed7ee6 | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2561 | goto invalid; |
| 2562 | break; |
| 2563 | default: |
| 2564 | goto invalid; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2565 | } |
Johannes Berg | bed7ee6 | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2566 | |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2567 | goto queue; |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2568 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2569 | /* verify action_code is present */ |
| 2570 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2571 | break; |
| 2572 | |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2573 | switch (mgmt->u.action.u.measurement.action_code) { |
| 2574 | case WLAN_ACTION_SPCT_MSR_REQ: |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2575 | if (status->band != IEEE80211_BAND_5GHZ) |
| 2576 | break; |
| 2577 | |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2578 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2579 | sizeof(mgmt->u.action.u.measurement))) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2580 | break; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2581 | |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 2582 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2583 | break; |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 2584 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2585 | ieee80211_process_measurement_req(sdata, mgmt, len); |
| 2586 | goto handled; |
| 2587 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
| 2588 | u8 *bssid; |
| 2589 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2590 | sizeof(mgmt->u.action.u.chan_switch))) |
| 2591 | break; |
| 2592 | |
| 2593 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 2594 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2595 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2596 | break; |
| 2597 | |
| 2598 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 2599 | bssid = sdata->u.mgd.bssid; |
| 2600 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 2601 | bssid = sdata->u.ibss.bssid; |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 2602 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
| 2603 | bssid = mgmt->sa; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2604 | else |
| 2605 | break; |
| 2606 | |
| 2607 | if (!ether_addr_equal(mgmt->bssid, bssid)) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2608 | break; |
Sujith | c481ec9 | 2009-01-06 09:28:37 +0530 | [diff] [blame] | 2609 | |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2610 | goto queue; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2611 | } |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2612 | } |
| 2613 | break; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2614 | case WLAN_CATEGORY_SA_QUERY: |
| 2615 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2616 | sizeof(mgmt->u.action.u.sa_query))) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2617 | break; |
| 2618 | |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2619 | switch (mgmt->u.action.u.sa_query.action) { |
| 2620 | case WLAN_ACTION_SA_QUERY_REQUEST: |
| 2621 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2622 | break; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2623 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2624 | goto handled; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2625 | } |
| 2626 | break; |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2627 | case WLAN_CATEGORY_SELF_PROTECTED: |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2628 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2629 | sizeof(mgmt->u.action.u.self_prot.action_code))) |
| 2630 | break; |
| 2631 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2632 | switch (mgmt->u.action.u.self_prot.action_code) { |
| 2633 | case WLAN_SP_MESH_PEERING_OPEN: |
| 2634 | case WLAN_SP_MESH_PEERING_CLOSE: |
| 2635 | case WLAN_SP_MESH_PEERING_CONFIRM: |
| 2636 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2637 | goto invalid; |
Thomas Pedersen | a6dad6a | 2013-03-04 13:06:12 -0800 | [diff] [blame] | 2638 | if (sdata->u.mesh.user_mpm) |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2639 | /* userspace handles this frame */ |
| 2640 | break; |
| 2641 | goto queue; |
| 2642 | case WLAN_SP_MGK_INFORM: |
| 2643 | case WLAN_SP_MGK_ACK: |
| 2644 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2645 | goto invalid; |
| 2646 | break; |
| 2647 | } |
| 2648 | break; |
Javier Cardona | d3aaec8 | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 2649 | case WLAN_CATEGORY_MESH_ACTION: |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2650 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2651 | sizeof(mgmt->u.action.u.mesh_action.action_code))) |
| 2652 | break; |
| 2653 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2654 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2655 | break; |
Thomas Pedersen | 25d49e4 | 2011-08-11 19:35:15 -0700 | [diff] [blame] | 2656 | if (mesh_action_is_path_sel(mgmt) && |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 2657 | !mesh_path_sel_is_hwmp(sdata)) |
Javier Cardona | c7108a7 | 2010-12-16 17:37:50 -0800 | [diff] [blame] | 2658 | break; |
| 2659 | goto queue; |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2660 | } |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2661 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2662 | return RX_CONTINUE; |
| 2663 | |
Johannes Berg | bed7ee6 | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2664 | invalid: |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2665 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2666 | /* will return in the next handlers */ |
| 2667 | return RX_CONTINUE; |
| 2668 | |
| 2669 | handled: |
| 2670 | if (rx->sta) |
| 2671 | rx->sta->rx_packets++; |
| 2672 | dev_kfree_skb(rx->skb); |
| 2673 | return RX_QUEUED; |
| 2674 | |
| 2675 | queue: |
| 2676 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
| 2677 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
| 2678 | ieee80211_queue_work(&local->hw, &sdata->work); |
| 2679 | if (rx->sta) |
| 2680 | rx->sta->rx_packets++; |
| 2681 | return RX_QUEUED; |
| 2682 | } |
| 2683 | |
| 2684 | static ieee80211_rx_result debug_noinline |
| 2685 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) |
| 2686 | { |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2687 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2688 | int sig = 0; |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2689 | |
| 2690 | /* skip known-bad action frames and return them in the next handler */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2691 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2692 | return RX_CONTINUE; |
Felix Fietkau | d790744 | 2010-01-07 20:23:53 +0100 | [diff] [blame] | 2693 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2694 | /* |
| 2695 | * Getting here means the kernel doesn't know how to handle |
| 2696 | * it, but maybe userspace does ... include returned frames |
| 2697 | * so userspace can register for those to know whether ones |
| 2698 | * it transmitted were processed or returned. |
| 2699 | */ |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2700 | |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2701 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
| 2702 | sig = status->signal; |
| 2703 | |
Johannes Berg | 71bbc99 | 2012-06-15 15:30:18 +0200 | [diff] [blame] | 2704 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
Vladimir Kondratiev | 19504cf | 2013-08-15 14:51:28 +0300 | [diff] [blame] | 2705 | rx->skb->data, rx->skb->len, 0, GFP_ATOMIC)) { |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2706 | if (rx->sta) |
| 2707 | rx->sta->rx_packets++; |
| 2708 | dev_kfree_skb(rx->skb); |
| 2709 | return RX_QUEUED; |
| 2710 | } |
| 2711 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2712 | return RX_CONTINUE; |
| 2713 | } |
| 2714 | |
| 2715 | static ieee80211_rx_result debug_noinline |
| 2716 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) |
| 2717 | { |
| 2718 | struct ieee80211_local *local = rx->local; |
| 2719 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
| 2720 | struct sk_buff *nskb; |
| 2721 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2722 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2723 | |
| 2724 | if (!ieee80211_is_action(mgmt->frame_control)) |
| 2725 | return RX_CONTINUE; |
| 2726 | |
| 2727 | /* |
| 2728 | * For AP mode, hostapd is responsible for handling any action |
| 2729 | * frames that we didn't handle, including returning unknown |
| 2730 | * ones. For all other modes we will return them to the sender, |
| 2731 | * setting the 0x80 bit in the action category, as required by |
Johannes Berg | 4b5ebcc | 2012-06-27 15:38:56 +0200 | [diff] [blame] | 2732 | * 802.11-2012 9.24.4. |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2733 | * Newer versions of hostapd shall also use the management frame |
| 2734 | * registration mechanisms, but older ones still use cooked |
| 2735 | * monitor interfaces so push all frames there. |
| 2736 | */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2737 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2738 | (sdata->vif.type == NL80211_IFTYPE_AP || |
| 2739 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
| 2740 | return RX_DROP_MONITOR; |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2741 | |
Johannes Berg | 4b5ebcc | 2012-06-27 15:38:56 +0200 | [diff] [blame] | 2742 | if (is_multicast_ether_addr(mgmt->da)) |
| 2743 | return RX_DROP_MONITOR; |
| 2744 | |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2745 | /* do not return rejected action frames */ |
| 2746 | if (mgmt->u.action.category & 0x80) |
| 2747 | return RX_DROP_UNUSABLE; |
| 2748 | |
| 2749 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, |
| 2750 | GFP_ATOMIC); |
| 2751 | if (nskb) { |
John W. Linville | 292b4df | 2010-06-24 11:13:56 -0400 | [diff] [blame] | 2752 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2753 | |
John W. Linville | 292b4df | 2010-06-24 11:13:56 -0400 | [diff] [blame] | 2754 | nmgmt->u.action.category |= 0x80; |
| 2755 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); |
| 2756 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2757 | |
| 2758 | memset(nskb->cb, 0, sizeof(nskb->cb)); |
| 2759 | |
Johannes Berg | 07e5a5f | 2013-03-07 13:22:05 +0100 | [diff] [blame] | 2760 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
| 2761 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); |
| 2762 | |
| 2763 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | |
| 2764 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | |
| 2765 | IEEE80211_TX_CTL_NO_CCK_RATE; |
| 2766 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
| 2767 | info->hw_queue = |
| 2768 | local->hw.offchannel_tx_hw_queue; |
| 2769 | } |
| 2770 | |
| 2771 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, |
| 2772 | status->band); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2773 | } |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2774 | dev_kfree_skb(rx->skb); |
| 2775 | return RX_QUEUED; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2776 | } |
| 2777 | |
| 2778 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2779 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2780 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2781 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2782 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
| 2783 | __le16 stype; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2784 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2785 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 2786 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2787 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
| 2788 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2789 | sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2790 | return RX_DROP_MONITOR; |
Johannes Berg | f9d540e | 2007-09-28 14:02:09 +0200 | [diff] [blame] | 2791 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2792 | switch (stype) { |
Johannes Berg | 66e67e4 | 2012-01-20 13:55:27 +0100 | [diff] [blame] | 2793 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2794 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
| 2795 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): |
| 2796 | /* process for all: mesh, mlme, ibss */ |
| 2797 | break; |
Johannes Berg | 66e67e4 | 2012-01-20 13:55:27 +0100 | [diff] [blame] | 2798 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
| 2799 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2800 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
| 2801 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): |
Christian Lamparter | 2c31333 | 2010-11-29 20:53:23 +0100 | [diff] [blame] | 2802 | if (is_multicast_ether_addr(mgmt->da) && |
| 2803 | !is_broadcast_ether_addr(mgmt->da)) |
| 2804 | return RX_DROP_MONITOR; |
| 2805 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2806 | /* process only for station */ |
| 2807 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2808 | return RX_DROP_MONITOR; |
| 2809 | break; |
| 2810 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): |
Thomas Pedersen | 9fb04b5 | 2013-02-14 11:20:14 -0800 | [diff] [blame] | 2811 | /* process only for ibss and mesh */ |
| 2812 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2813 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2814 | return RX_DROP_MONITOR; |
| 2815 | break; |
| 2816 | default: |
| 2817 | return RX_DROP_MONITOR; |
| 2818 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2819 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2820 | /* queue up frame and kick off work to process it */ |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 2821 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2822 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
| 2823 | ieee80211_queue_work(&rx->local->hw, &sdata->work); |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2824 | if (rx->sta) |
| 2825 | rx->sta->rx_packets++; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2826 | |
| 2827 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2828 | } |
| 2829 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2830 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
Johannes Berg | 5f0b7de | 2009-11-16 13:58:21 +0100 | [diff] [blame] | 2831 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
| 2832 | struct ieee80211_rate *rate) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2833 | { |
| 2834 | struct ieee80211_sub_if_data *sdata; |
| 2835 | struct ieee80211_local *local = rx->local; |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2836 | struct sk_buff *skb = rx->skb, *skb2; |
| 2837 | struct net_device *prev_dev = NULL; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2838 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2839 | int needed_headroom; |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2840 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2841 | /* |
| 2842 | * If cooked monitor has been processed already, then |
| 2843 | * don't do it again. If not, set the flag. |
| 2844 | */ |
| 2845 | if (rx->flags & IEEE80211_RX_CMNTR) |
John W. Linville | 7c1e183 | 2010-09-24 15:52:49 -0400 | [diff] [blame] | 2846 | goto out_free_skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2847 | rx->flags |= IEEE80211_RX_CMNTR; |
John W. Linville | 7c1e183 | 2010-09-24 15:52:49 -0400 | [diff] [blame] | 2848 | |
Johannes Berg | 152c477 | 2011-10-21 10:22:22 +0200 | [diff] [blame] | 2849 | /* If there are no cooked monitor interfaces, just free the SKB */ |
| 2850 | if (!local->cooked_mntrs) |
| 2851 | goto out_free_skb; |
| 2852 | |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2853 | /* room for the radiotap header based on driver features */ |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 2854 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2855 | |
| 2856 | if (skb_headroom(skb) < needed_headroom && |
| 2857 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2858 | goto out_free_skb; |
| 2859 | |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2860 | /* prepend radiotap information */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 2861 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
| 2862 | false); |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2863 | |
| 2864 | skb_set_mac_header(skb, 0); |
| 2865 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 2866 | skb->pkt_type = PACKET_OTHERHOST; |
| 2867 | skb->protocol = htons(ETH_P_802_2); |
| 2868 | |
| 2869 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 2870 | if (!ieee80211_sdata_running(sdata)) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2871 | continue; |
| 2872 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2873 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2874 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
| 2875 | continue; |
| 2876 | |
| 2877 | if (prev_dev) { |
| 2878 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 2879 | if (skb2) { |
| 2880 | skb2->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 2881 | netif_receive_skb(skb2); |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2882 | } |
| 2883 | } |
| 2884 | |
| 2885 | prev_dev = sdata->dev; |
| 2886 | sdata->dev->stats.rx_packets++; |
| 2887 | sdata->dev->stats.rx_bytes += skb->len; |
| 2888 | } |
| 2889 | |
| 2890 | if (prev_dev) { |
| 2891 | skb->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 2892 | netif_receive_skb(skb); |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2893 | return; |
| 2894 | } |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2895 | |
| 2896 | out_free_skb: |
| 2897 | dev_kfree_skb(skb); |
| 2898 | } |
| 2899 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2900 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
| 2901 | ieee80211_rx_result res) |
| 2902 | { |
| 2903 | switch (res) { |
| 2904 | case RX_DROP_MONITOR: |
| 2905 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); |
| 2906 | if (rx->sta) |
| 2907 | rx->sta->rx_dropped++; |
| 2908 | /* fall through */ |
| 2909 | case RX_CONTINUE: { |
| 2910 | struct ieee80211_rate *rate = NULL; |
| 2911 | struct ieee80211_supported_band *sband; |
| 2912 | struct ieee80211_rx_status *status; |
| 2913 | |
| 2914 | status = IEEE80211_SKB_RXCB((rx->skb)); |
| 2915 | |
| 2916 | sband = rx->local->hw.wiphy->bands[status->band]; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 2917 | if (!(status->flag & RX_FLAG_HT) && |
| 2918 | !(status->flag & RX_FLAG_VHT)) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2919 | rate = &sband->bitrates[status->rate_idx]; |
| 2920 | |
| 2921 | ieee80211_rx_cooked_monitor(rx, rate); |
| 2922 | break; |
| 2923 | } |
| 2924 | case RX_DROP_UNUSABLE: |
| 2925 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); |
| 2926 | if (rx->sta) |
| 2927 | rx->sta->rx_dropped++; |
| 2928 | dev_kfree_skb(rx->skb); |
| 2929 | break; |
| 2930 | case RX_QUEUED: |
| 2931 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); |
| 2932 | break; |
| 2933 | } |
| 2934 | } |
| 2935 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2936 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
| 2937 | struct sk_buff_head *frames) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2938 | { |
| 2939 | ieee80211_rx_result res = RX_DROP_MONITOR; |
| 2940 | struct sk_buff *skb; |
| 2941 | |
| 2942 | #define CALL_RXH(rxh) \ |
| 2943 | do { \ |
| 2944 | res = rxh(rx); \ |
| 2945 | if (res != RX_CONTINUE) \ |
| 2946 | goto rxh_next; \ |
| 2947 | } while (0); |
| 2948 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2949 | spin_lock_bh(&rx->local->rx_path_lock); |
Christian Lamparter | 24a8fda | 2010-12-30 17:25:29 +0100 | [diff] [blame] | 2950 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2951 | while ((skb = __skb_dequeue(frames))) { |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2952 | /* |
| 2953 | * all the other fields are valid across frames |
| 2954 | * that belong to an aMPDU since they are on the |
| 2955 | * same TID from the same station |
| 2956 | */ |
| 2957 | rx->skb = skb; |
| 2958 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2959 | CALL_RXH(ieee80211_rx_h_check_more_data) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 2960 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2961 | CALL_RXH(ieee80211_rx_h_sta_process) |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 2962 | CALL_RXH(ieee80211_rx_h_decrypt) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2963 | CALL_RXH(ieee80211_rx_h_defragment) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2964 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
| 2965 | /* must be after MMIC verify so header is counted in MPDU mic */ |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2966 | #ifdef CONFIG_MAC80211_MESH |
| 2967 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
| 2968 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
| 2969 | #endif |
Javier Cardona | 2154c81 | 2011-09-07 17:49:53 -0700 | [diff] [blame] | 2970 | CALL_RXH(ieee80211_rx_h_amsdu) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2971 | CALL_RXH(ieee80211_rx_h_data) |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2972 | |
| 2973 | /* special treatment -- needs the queue */ |
| 2974 | res = ieee80211_rx_h_ctrl(rx, frames); |
| 2975 | if (res != RX_CONTINUE) |
| 2976 | goto rxh_next; |
| 2977 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2978 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2979 | CALL_RXH(ieee80211_rx_h_action) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2980 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
| 2981 | CALL_RXH(ieee80211_rx_h_action_return) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2982 | CALL_RXH(ieee80211_rx_h_mgmt) |
| 2983 | |
| 2984 | rxh_next: |
| 2985 | ieee80211_rx_handlers_result(rx, res); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2986 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2987 | #undef CALL_RXH |
| 2988 | } |
Christian Lamparter | 24a8fda | 2010-12-30 17:25:29 +0100 | [diff] [blame] | 2989 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2990 | spin_unlock_bh(&rx->local->rx_path_lock); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2991 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2992 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 2993 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 2994 | { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2995 | struct sk_buff_head reorder_release; |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 2996 | ieee80211_rx_result res = RX_DROP_MONITOR; |
| 2997 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2998 | __skb_queue_head_init(&reorder_release); |
| 2999 | |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 3000 | #define CALL_RXH(rxh) \ |
| 3001 | do { \ |
| 3002 | res = rxh(rx); \ |
| 3003 | if (res != RX_CONTINUE) \ |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3004 | goto rxh_next; \ |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 3005 | } while (0); |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3006 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 3007 | CALL_RXH(ieee80211_rx_h_check) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3008 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3009 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3010 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3011 | ieee80211_rx_handlers(rx, &reorder_release); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3012 | return; |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 3013 | |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3014 | rxh_next: |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3015 | ieee80211_rx_handlers_result(rx, res); |
| 3016 | |
| 3017 | #undef CALL_RXH |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3018 | } |
| 3019 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3020 | /* |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 3021 | * This function makes calls into the RX path, therefore |
| 3022 | * it has to be invoked under RCU read lock. |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3023 | */ |
| 3024 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) |
| 3025 | { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3026 | struct sk_buff_head frames; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3027 | struct ieee80211_rx_data rx = { |
| 3028 | .sta = sta, |
| 3029 | .sdata = sta->sdata, |
| 3030 | .local = sta->local, |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 3031 | /* This is OK -- must be QoS data frame */ |
| 3032 | .security_idx = tid, |
| 3033 | .seqno_idx = tid, |
Helmut Schaa | fcf8bd3 | 2011-04-01 15:46:05 +0200 | [diff] [blame] | 3034 | .flags = 0, |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3035 | }; |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3036 | struct tid_ampdu_rx *tid_agg_rx; |
| 3037 | |
| 3038 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
| 3039 | if (!tid_agg_rx) |
| 3040 | return; |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3041 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3042 | __skb_queue_head_init(&frames); |
| 3043 | |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3044 | spin_lock(&tid_agg_rx->reorder_lock); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3045 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3046 | spin_unlock(&tid_agg_rx->reorder_lock); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3047 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3048 | ieee80211_rx_handlers(&rx, &frames); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3049 | } |
| 3050 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3051 | /* main receive path */ |
| 3052 | |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3053 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
| 3054 | struct ieee80211_hdr *hdr) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3055 | { |
Johannes Berg | 20b01f8 | 2010-09-24 11:21:05 +0200 | [diff] [blame] | 3056 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 3057 | struct sk_buff *skb = rx->skb; |
| 3058 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 3059 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3060 | int multicast = is_multicast_ether_addr(hdr->addr1); |
| 3061 | |
Johannes Berg | 51fb61e | 2007-12-19 01:31:27 +0100 | [diff] [blame] | 3062 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3063 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 3064 | if (!bssid && !sdata->u.mgd.use_4addr) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3065 | return false; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 3066 | if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3067 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Felix Fietkau | 4f31233 | 2011-02-05 23:48:37 +0100 | [diff] [blame] | 3068 | if (!(sdata->dev->flags & IFF_PROMISC) || |
| 3069 | sdata->u.mgd.use_4addr) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3070 | return false; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3071 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3072 | } |
| 3073 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3074 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3075 | if (!bssid) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3076 | return false; |
Felix Fietkau | 6329b8d | 2013-09-17 11:15:43 +0200 | [diff] [blame] | 3077 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
| 3078 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3079 | return false; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 3080 | if (ieee80211_is_beacon(hdr->frame_control)) { |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3081 | return true; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3082 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3083 | return false; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3084 | } else if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3085 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Johannes Berg | 4150c57 | 2007-09-17 01:29:23 -0400 | [diff] [blame] | 3086 | if (!(sdata->dev->flags & IFF_PROMISC)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3087 | return false; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3088 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3089 | } else if (!rx->sta) { |
| 3090 | int rate_idx; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 3091 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
| 3092 | rate_idx = 0; /* TODO: HT/VHT rates */ |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3093 | else |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 3094 | rate_idx = status->rate_idx; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 3095 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
| 3096 | BIT(rate_idx)); |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3097 | } |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3098 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3099 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3100 | if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3101 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3102 | if (!(sdata->dev->flags & IFF_PROMISC)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3103 | return false; |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3104 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3105 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3106 | } |
| 3107 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3108 | case NL80211_IFTYPE_AP_VLAN: |
| 3109 | case NL80211_IFTYPE_AP: |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3110 | if (!bssid) { |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3111 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3112 | return false; |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3113 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
Johannes Berg | 3df6eae | 2011-12-06 10:39:40 +0100 | [diff] [blame] | 3114 | /* |
| 3115 | * Accept public action frames even when the |
| 3116 | * BSSID doesn't match, this is used for P2P |
| 3117 | * and location updates. Note that mac80211 |
| 3118 | * itself never looks at these frames. |
| 3119 | */ |
Johannes Berg | 2b9ccd4 | 2013-05-13 16:42:40 +0200 | [diff] [blame] | 3120 | if (!multicast && |
| 3121 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3122 | return false; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3123 | if (ieee80211_is_public_action(hdr, skb->len)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3124 | return true; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3125 | if (!ieee80211_is_beacon(hdr->frame_control)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3126 | return false; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3127 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3128 | } |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3129 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3130 | case NL80211_IFTYPE_WDS: |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 3131 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3132 | return false; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3133 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3134 | return false; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3135 | break; |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3136 | case NL80211_IFTYPE_P2P_DEVICE: |
| 3137 | if (!ieee80211_is_public_action(hdr, skb->len) && |
| 3138 | !ieee80211_is_probe_req(hdr->frame_control) && |
| 3139 | !ieee80211_is_probe_resp(hdr->frame_control) && |
| 3140 | !ieee80211_is_beacon(hdr->frame_control)) |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3141 | return false; |
Johannes Berg | 1b737f8 | 2013-04-18 23:42:19 +0200 | [diff] [blame] | 3142 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
| 3143 | !multicast) |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3144 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
| 3145 | break; |
Johannes Berg | 2ca27bc | 2010-09-16 14:58:23 +0200 | [diff] [blame] | 3146 | default: |
Johannes Berg | fb1c1cd | 2007-09-26 15:19:43 +0200 | [diff] [blame] | 3147 | /* should never get here */ |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3148 | WARN_ON_ONCE(1); |
Johannes Berg | fb1c1cd | 2007-09-26 15:19:43 +0200 | [diff] [blame] | 3149 | break; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3150 | } |
| 3151 | |
Johannes Berg | 3c2723f | 2014-01-07 16:23:24 +0100 | [diff] [blame] | 3152 | return true; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3153 | } |
| 3154 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3155 | /* |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3156 | * This function returns whether or not the SKB |
| 3157 | * was destined for RX processing or not, which, |
| 3158 | * if consume is true, is equivalent to whether |
| 3159 | * or not the skb was consumed. |
| 3160 | */ |
| 3161 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, |
| 3162 | struct sk_buff *skb, bool consume) |
| 3163 | { |
| 3164 | struct ieee80211_local *local = rx->local; |
| 3165 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 3166 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 3167 | struct ieee80211_hdr *hdr = (void *)skb->data; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3168 | |
| 3169 | rx->skb = skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3170 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3171 | |
Emmanuel Grumbach | 4079194 | 2014-01-07 13:10:20 +0200 | [diff] [blame] | 3172 | if (!prepare_for_handlers(rx, hdr)) |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3173 | return false; |
| 3174 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3175 | if (!consume) { |
| 3176 | skb = skb_copy(skb, GFP_ATOMIC); |
| 3177 | if (!skb) { |
| 3178 | if (net_ratelimit()) |
| 3179 | wiphy_debug(local->hw.wiphy, |
Ben Greear | b305dae | 2011-01-08 10:30:54 -0800 | [diff] [blame] | 3180 | "failed to copy skb for %s\n", |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3181 | sdata->name); |
| 3182 | return true; |
| 3183 | } |
| 3184 | |
| 3185 | rx->skb = skb; |
| 3186 | } |
| 3187 | |
| 3188 | ieee80211_invoke_rx_handlers(rx); |
| 3189 | return true; |
| 3190 | } |
| 3191 | |
| 3192 | /* |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3193 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
| 3194 | * be called with rcu_read_lock protection. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3195 | */ |
Ron Rindjunsky | 71ebb4a | 2008-01-21 12:39:12 +0200 | [diff] [blame] | 3196 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 3197 | struct sk_buff *skb) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3198 | { |
| 3199 | struct ieee80211_local *local = hw_to_local(hw); |
| 3200 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3201 | struct ieee80211_hdr *hdr; |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3202 | __le16 fc; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 3203 | struct ieee80211_rx_data rx; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3204 | struct ieee80211_sub_if_data *prev; |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3205 | struct sta_info *sta, *tmp, *prev_sta; |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3206 | int err = 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3207 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3208 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3209 | memset(&rx, 0, sizeof(rx)); |
| 3210 | rx.skb = skb; |
| 3211 | rx.local = local; |
Johannes Berg | 72abd81 | 2007-09-17 01:29:22 -0400 | [diff] [blame] | 3212 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3213 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3214 | local->dot11ReceivedFragmentCount++; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3215 | |
Johannes Berg | 4a4f1a5 | 2012-10-26 00:33:36 +0200 | [diff] [blame] | 3216 | if (ieee80211_is_mgmt(fc)) { |
| 3217 | /* drop frame if too short for header */ |
| 3218 | if (skb->len < ieee80211_hdrlen(fc)) |
| 3219 | err = -ENOBUFS; |
| 3220 | else |
| 3221 | err = skb_linearize(skb); |
| 3222 | } else { |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3223 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
Johannes Berg | 4a4f1a5 | 2012-10-26 00:33:36 +0200 | [diff] [blame] | 3224 | } |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3225 | |
| 3226 | if (err) { |
| 3227 | dev_kfree_skb(skb); |
| 3228 | return; |
| 3229 | } |
| 3230 | |
| 3231 | hdr = (struct ieee80211_hdr *)skb->data; |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 3232 | ieee80211_parse_qos(&rx); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 3233 | ieee80211_verify_alignment(&rx); |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 3234 | |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3235 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
| 3236 | ieee80211_is_beacon(hdr->frame_control))) |
| 3237 | ieee80211_scan_rx(local, skb); |
| 3238 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3239 | if (ieee80211_is_data(fc)) { |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3240 | prev_sta = NULL; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3241 | |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3242 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3243 | if (!prev_sta) { |
| 3244 | prev_sta = sta; |
| 3245 | continue; |
| 3246 | } |
| 3247 | |
| 3248 | rx.sta = prev_sta; |
| 3249 | rx.sdata = prev_sta->sdata; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3250 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3251 | |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3252 | prev_sta = sta; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3253 | } |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3254 | |
| 3255 | if (prev_sta) { |
| 3256 | rx.sta = prev_sta; |
| 3257 | rx.sdata = prev_sta->sdata; |
| 3258 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3259 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3260 | return; |
Senthil Balasubramanian | 8e26d5a | 2010-11-30 20:15:38 +0530 | [diff] [blame] | 3261 | goto out; |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3262 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3263 | } |
| 3264 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3265 | prev = NULL; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3266 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3267 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 3268 | if (!ieee80211_sdata_running(sdata)) |
| 3269 | continue; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 3270 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3271 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| 3272 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 3273 | continue; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 3274 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3275 | /* |
| 3276 | * frame is destined for this interface, but if it's |
| 3277 | * not also for the previous one we handle that after |
| 3278 | * the loop to avoid copying the SKB once too much |
| 3279 | */ |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 3280 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3281 | if (!prev) { |
Johannes Berg | 340e11f | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3282 | prev = sdata; |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3283 | continue; |
Johannes Berg | 8e6f0032 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3284 | } |
Felix Fietkau | 4bb29f8 | 2010-01-22 00:36:39 +0100 | [diff] [blame] | 3285 | |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3286 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3287 | rx.sdata = prev; |
| 3288 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
Felix Fietkau | 4bb29f8 | 2010-01-22 00:36:39 +0100 | [diff] [blame] | 3289 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3290 | prev = sdata; |
| 3291 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3292 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3293 | if (prev) { |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3294 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3295 | rx.sdata = prev; |
| 3296 | |
| 3297 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
| 3298 | return; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3299 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3300 | |
Senthil Balasubramanian | 8e26d5a | 2010-11-30 20:15:38 +0530 | [diff] [blame] | 3301 | out: |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3302 | dev_kfree_skb(skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3303 | } |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3304 | |
| 3305 | /* |
| 3306 | * This is the receive path handler. It is called by a low level driver when an |
| 3307 | * 802.11 MPDU is received from the hardware. |
| 3308 | */ |
John W. Linville | 103bf9f | 2009-08-20 16:34:15 -0400 | [diff] [blame] | 3309 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3310 | { |
| 3311 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3312 | struct ieee80211_rate *rate = NULL; |
| 3313 | struct ieee80211_supported_band *sband; |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3314 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3315 | |
Johannes Berg | d20ef63 | 2009-10-11 15:10:40 +0200 | [diff] [blame] | 3316 | WARN_ON_ONCE(softirq_count() == 0); |
| 3317 | |
Johannes Berg | 444e380 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3318 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3319 | goto drop; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3320 | |
| 3321 | sband = local->hw.wiphy->bands[status->band]; |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3322 | if (WARN_ON(!sband)) |
| 3323 | goto drop; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3324 | |
Johannes Berg | 89c3a8a | 2009-07-28 18:10:17 +0200 | [diff] [blame] | 3325 | /* |
| 3326 | * If we're suspending, it is possible although not too likely |
| 3327 | * that we'd be receiving frames after having already partially |
| 3328 | * quiesced the stack. We can't process such frames then since |
| 3329 | * that might, for example, cause stations to be added or other |
| 3330 | * driver callbacks be invoked. |
| 3331 | */ |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3332 | if (unlikely(local->quiescing || local->suspended)) |
| 3333 | goto drop; |
Johannes Berg | 89c3a8a | 2009-07-28 18:10:17 +0200 | [diff] [blame] | 3334 | |
Arik Nemtsov | 04800ad | 2012-06-06 11:25:02 +0300 | [diff] [blame] | 3335 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
| 3336 | if (unlikely(local->in_reconfig)) |
| 3337 | goto drop; |
| 3338 | |
Johannes Berg | ea77f12 | 2009-08-21 14:44:45 +0200 | [diff] [blame] | 3339 | /* |
| 3340 | * The same happens when we're not even started, |
| 3341 | * but that's worth a warning. |
| 3342 | */ |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3343 | if (WARN_ON(!local->started)) |
| 3344 | goto drop; |
Johannes Berg | ea77f12 | 2009-08-21 14:44:45 +0200 | [diff] [blame] | 3345 | |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3346 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
Luis R. Rodriguez | e5d6eb8 | 2009-11-09 16:03:22 -0500 | [diff] [blame] | 3347 | /* |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3348 | * Validate the rate, unless a PLCP error means that |
| 3349 | * we probably can't have a valid rate here anyway. |
Luis R. Rodriguez | e5d6eb8 | 2009-11-09 16:03:22 -0500 | [diff] [blame] | 3350 | */ |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3351 | |
| 3352 | if (status->flag & RX_FLAG_HT) { |
| 3353 | /* |
| 3354 | * rate_idx is MCS index, which can be [0-76] |
| 3355 | * as documented on: |
| 3356 | * |
| 3357 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n |
| 3358 | * |
| 3359 | * Anything else would be some sort of driver or |
| 3360 | * hardware error. The driver should catch hardware |
| 3361 | * errors. |
| 3362 | */ |
Johannes Berg | 444e380 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3363 | if (WARN(status->rate_idx > 76, |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3364 | "Rate marked as an HT rate but passed " |
| 3365 | "status->rate_idx is not " |
| 3366 | "an MCS index [0-76]: %d (0x%02x)\n", |
| 3367 | status->rate_idx, |
| 3368 | status->rate_idx)) |
| 3369 | goto drop; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 3370 | } else if (status->flag & RX_FLAG_VHT) { |
| 3371 | if (WARN_ONCE(status->rate_idx > 9 || |
| 3372 | !status->vht_nss || |
| 3373 | status->vht_nss > 8, |
| 3374 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", |
| 3375 | status->rate_idx, status->vht_nss)) |
| 3376 | goto drop; |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3377 | } else { |
Johannes Berg | 444e380 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3378 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3379 | goto drop; |
| 3380 | rate = &sband->bitrates[status->rate_idx]; |
| 3381 | } |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3382 | } |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3383 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3384 | status->rx_flags = 0; |
| 3385 | |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3386 | /* |
| 3387 | * key references and virtual interfaces are protected using RCU |
| 3388 | * and this requires that we are in a read-side RCU section during |
| 3389 | * receive processing |
| 3390 | */ |
| 3391 | rcu_read_lock(); |
| 3392 | |
| 3393 | /* |
| 3394 | * Frames with failed FCS/PLCP checksum are not returned, |
| 3395 | * all other frames are returned without radiotap header |
| 3396 | * if it was previously present. |
| 3397 | * Also, frames with less than 16 bytes are dropped. |
| 3398 | */ |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3399 | skb = ieee80211_rx_monitor(local, skb, rate); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3400 | if (!skb) { |
| 3401 | rcu_read_unlock(); |
| 3402 | return; |
| 3403 | } |
| 3404 | |
Johannes Berg | e1e5406 | 2010-11-30 08:58:45 +0100 | [diff] [blame] | 3405 | ieee80211_tpt_led_trig_rx(local, |
| 3406 | ((struct ieee80211_hdr *)skb->data)->frame_control, |
| 3407 | skb->len); |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 3408 | __ieee80211_rx_handle_packet(hw, skb); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3409 | |
| 3410 | rcu_read_unlock(); |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3411 | |
| 3412 | return; |
| 3413 | drop: |
| 3414 | kfree_skb(skb); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3415 | } |
John W. Linville | 103bf9f | 2009-08-20 16:34:15 -0400 | [diff] [blame] | 3416 | EXPORT_SYMBOL(ieee80211_rx); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3417 | |
| 3418 | /* This is a version of the rx handler that can be called from hard irq |
| 3419 | * context. Post the skb on the queue and schedule the tasklet */ |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3420 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3421 | { |
| 3422 | struct ieee80211_local *local = hw_to_local(hw); |
| 3423 | |
| 3424 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); |
| 3425 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3426 | skb->pkt_type = IEEE80211_RX_MSG; |
| 3427 | skb_queue_tail(&local->skb_queue, skb); |
| 3428 | tasklet_schedule(&local->tasklet); |
| 3429 | } |
| 3430 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |