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 | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 43 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 44 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 45 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
| 46 | if (likely(skb->len > FCS_LEN)) |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 47 | __pskb_trim(skb, skb->len - FCS_LEN); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 48 | else { |
| 49 | /* driver bug */ |
| 50 | WARN_ON(1); |
| 51 | dev_kfree_skb(skb); |
Dan Carpenter | 0624760 | 2012-11-27 20:31:19 +0300 | [diff] [blame] | 52 | return NULL; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 53 | } |
| 54 | } |
| 55 | |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 56 | if (status->vendor_radiotap_len) |
| 57 | __pskb_pull(skb, status->vendor_radiotap_len); |
| 58 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 59 | return skb; |
| 60 | } |
| 61 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 62 | 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] | 63 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 64 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 605f1a5 | 2012-11-22 10:20:58 +0100 | [diff] [blame] | 65 | struct ieee80211_hdr *hdr; |
| 66 | |
| 67 | hdr = (void *)(skb->data + status->vendor_radiotap_len); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 68 | |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 69 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
| 70 | RX_FLAG_FAILED_PLCP_CRC | |
| 71 | RX_FLAG_AMPDU_IS_ZEROLEN)) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 72 | return 1; |
Johannes Berg | 605f1a5 | 2012-11-22 10:20:58 +0100 | [diff] [blame] | 73 | if (unlikely(skb->len < 16 + present_fcs_len + |
| 74 | status->vendor_radiotap_len)) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 75 | return 1; |
Harvey Harrison | 87228f5 | 2008-06-11 14:21:59 -0700 | [diff] [blame] | 76 | if (ieee80211_is_ctl(hdr->frame_control) && |
| 77 | !ieee80211_is_pspoll(hdr->frame_control) && |
| 78 | !ieee80211_is_back_req(hdr->frame_control)) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 79 | return 1; |
| 80 | return 0; |
| 81 | } |
| 82 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 83 | static int |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 84 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
| 85 | struct ieee80211_rx_status *status) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 86 | { |
| 87 | int len; |
| 88 | |
| 89 | /* always present fields */ |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 90 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 91 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 92 | /* allocate extra bitmaps */ |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 93 | if (status->vendor_radiotap_len) |
| 94 | len += 4; |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 95 | if (status->chains) |
| 96 | len += 4 * hweight8(status->chains); |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 97 | |
| 98 | if (ieee80211_have_rx_timestamp(status)) { |
| 99 | len = ALIGN(len, 8); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 100 | len += 8; |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 101 | } |
Johannes Berg | 7fee537 | 2009-01-30 11:13:06 +0100 | [diff] [blame] | 102 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 103 | len += 1; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 104 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 105 | /* antenna field, if we don't have per-chain info */ |
| 106 | if (!status->chains) |
| 107 | len += 1; |
| 108 | |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 109 | /* padding for RX_FLAGS if necessary */ |
| 110 | len = ALIGN(len, 2); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 111 | |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 112 | if (status->flag & RX_FLAG_HT) /* HT info */ |
| 113 | len += 3; |
| 114 | |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 115 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 116 | len = ALIGN(len, 4); |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 117 | len += 8; |
| 118 | } |
| 119 | |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 120 | if (status->flag & RX_FLAG_VHT) { |
| 121 | len = ALIGN(len, 2); |
| 122 | len += 12; |
| 123 | } |
| 124 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 125 | if (status->chains) { |
| 126 | /* antenna and antenna signal fields */ |
| 127 | len += 2 * hweight8(status->chains); |
| 128 | } |
| 129 | |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 130 | if (status->vendor_radiotap_len) { |
| 131 | if (WARN_ON_ONCE(status->vendor_radiotap_align == 0)) |
| 132 | status->vendor_radiotap_align = 1; |
| 133 | /* align standard part of vendor namespace */ |
| 134 | len = ALIGN(len, 2); |
| 135 | /* allocate standard part of vendor namespace */ |
| 136 | len += 6; |
| 137 | /* align vendor-defined part */ |
| 138 | len = ALIGN(len, status->vendor_radiotap_align); |
| 139 | /* vendor-defined part is already in skb */ |
| 140 | } |
| 141 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 142 | return len; |
| 143 | } |
| 144 | |
Johannes Berg | 00ea6de | 2012-09-05 15:54:51 +0200 | [diff] [blame] | 145 | /* |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 146 | * ieee80211_add_rx_radiotap_header - add radiotap header |
| 147 | * |
| 148 | * add a radiotap header containing all the fields which the hardware provided. |
| 149 | */ |
| 150 | static void |
| 151 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, |
| 152 | struct sk_buff *skb, |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 153 | struct ieee80211_rate *rate, |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 154 | int rtap_len, bool has_fcs) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 155 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 156 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 157 | struct ieee80211_radiotap_header *rthdr; |
| 158 | unsigned char *pos; |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 159 | __le32 *it_present; |
| 160 | u32 it_present_val; |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 161 | u16 rx_flags = 0; |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 162 | u16 channel_flags = 0; |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 163 | int mpdulen, chain; |
| 164 | unsigned long chains = status->chains; |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 165 | |
| 166 | mpdulen = skb->len; |
| 167 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) |
| 168 | mpdulen += FCS_LEN; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 169 | |
| 170 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); |
| 171 | memset(rthdr, 0, rtap_len); |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 172 | it_present = &rthdr->it_present; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 173 | |
| 174 | /* radiotap header, set always present flags */ |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 175 | rthdr->it_len = cpu_to_le16(rtap_len + status->vendor_radiotap_len); |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 176 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
| 177 | BIT(IEEE80211_RADIOTAP_CHANNEL) | |
| 178 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 179 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 180 | if (!status->chains) |
| 181 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); |
| 182 | |
| 183 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
| 184 | it_present_val |= |
| 185 | BIT(IEEE80211_RADIOTAP_EXT) | |
| 186 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); |
| 187 | put_unaligned_le32(it_present_val, it_present); |
| 188 | it_present++; |
| 189 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | |
| 190 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); |
| 191 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 192 | |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 193 | if (status->vendor_radiotap_len) { |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 194 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | |
| 195 | BIT(IEEE80211_RADIOTAP_EXT); |
| 196 | put_unaligned_le32(it_present_val, it_present); |
| 197 | it_present++; |
| 198 | it_present_val = status->vendor_radiotap_bitmap; |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 199 | } |
| 200 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 201 | put_unaligned_le32(it_present_val, it_present); |
| 202 | |
| 203 | pos = (void *)(it_present + 1); |
| 204 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 205 | /* the order of the following fields is important */ |
| 206 | |
| 207 | /* IEEE80211_RADIOTAP_TSFT */ |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 208 | if (ieee80211_have_rx_timestamp(status)) { |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 209 | /* padding */ |
| 210 | while ((pos - (u8 *)rthdr) & 7) |
| 211 | *pos++ = 0; |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 212 | put_unaligned_le64( |
| 213 | ieee80211_calculate_rx_timestamp(local, status, |
| 214 | mpdulen, 0), |
| 215 | pos); |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 216 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 217 | pos += 8; |
| 218 | } |
| 219 | |
| 220 | /* IEEE80211_RADIOTAP_FLAGS */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 221 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 222 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
Johannes Berg | aae8983 | 2009-03-13 12:52:10 +0100 | [diff] [blame] | 223 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
| 224 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; |
Bruno Randolf | b4f28bb | 2008-07-30 17:19:55 +0200 | [diff] [blame] | 225 | if (status->flag & RX_FLAG_SHORTPRE) |
| 226 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 227 | pos++; |
| 228 | |
| 229 | /* IEEE80211_RADIOTAP_RATE */ |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 230 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 231 | /* |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 232 | * Without rate information don't add it. If we have, |
Mohammed Shafi Shajakhan | 38f37be | 2011-02-07 10:10:04 +0530 | [diff] [blame] | 233 | * MCS information is a separate field in radiotap, |
Johannes Berg | 73b4809 | 2011-04-18 17:05:21 +0200 | [diff] [blame] | 234 | * added below. The byte here is needed as padding |
| 235 | * for the channel though, so initialise it to 0. |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 236 | */ |
| 237 | *pos = 0; |
Jouni Malinen | 8d6f658 | 2008-12-15 10:37:50 +0200 | [diff] [blame] | 238 | } else { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 239 | int shift = 0; |
Jouni Malinen | ebe6c7b | 2009-01-10 11:47:33 +0200 | [diff] [blame] | 240 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 241 | if (status->flag & RX_FLAG_10MHZ) |
| 242 | shift = 1; |
| 243 | else if (status->flag & RX_FLAG_5MHZ) |
| 244 | shift = 2; |
| 245 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); |
Jouni Malinen | 8d6f658 | 2008-12-15 10:37:50 +0200 | [diff] [blame] | 246 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 247 | pos++; |
| 248 | |
| 249 | /* IEEE80211_RADIOTAP_CHANNEL */ |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 250 | put_unaligned_le16(status->freq, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 251 | pos += 2; |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 252 | if (status->flag & RX_FLAG_10MHZ) |
| 253 | channel_flags |= IEEE80211_CHAN_HALF; |
| 254 | else if (status->flag & RX_FLAG_5MHZ) |
| 255 | channel_flags |= IEEE80211_CHAN_QUARTER; |
| 256 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 257 | if (status->band == IEEE80211_BAND_5GHZ) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 258 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 259 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 260 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 261 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 262 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 263 | else if (rate) |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 264 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
Johannes Berg | f8d1ccf | 2011-11-08 12:28:33 +0100 | [diff] [blame] | 265 | else |
Simon Wunderlich | a5e7069 | 2013-07-08 16:55:52 +0200 | [diff] [blame] | 266 | channel_flags |= IEEE80211_CHAN_2GHZ; |
| 267 | put_unaligned_le16(channel_flags, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 268 | pos += 2; |
| 269 | |
| 270 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ |
Felix Fietkau | fe8431f | 2012-03-01 18:00:07 +0100 | [diff] [blame] | 271 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
| 272 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 273 | *pos = status->signal; |
| 274 | rthdr->it_present |= |
| 275 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); |
| 276 | pos++; |
| 277 | } |
| 278 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 279 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
| 280 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 281 | if (!status->chains) { |
| 282 | /* IEEE80211_RADIOTAP_ANTENNA */ |
| 283 | *pos = status->antenna; |
| 284 | pos++; |
| 285 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 286 | |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 287 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
| 288 | |
| 289 | /* IEEE80211_RADIOTAP_RX_FLAGS */ |
| 290 | /* ensure 2 byte alignment for the 2 byte field as required */ |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 291 | if ((pos - (u8 *)rthdr) & 1) |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 292 | *pos++ = 0; |
Johannes Berg | aae8983 | 2009-03-13 12:52:10 +0100 | [diff] [blame] | 293 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
Johannes Berg | 6a86b9c | 2009-10-28 09:58:52 +0100 | [diff] [blame] | 294 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
| 295 | put_unaligned_le16(rx_flags, pos); |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 296 | pos += 2; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 297 | |
| 298 | if (status->flag & RX_FLAG_HT) { |
Oleksij Rempel | 786677d | 2013-05-24 12:05:45 +0200 | [diff] [blame] | 299 | unsigned int stbc; |
| 300 | |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 301 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
Johannes Berg | ac55d2f | 2012-05-10 09:09:10 +0200 | [diff] [blame] | 302 | *pos++ = local->hw.radiotap_mcs_details; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 303 | *pos = 0; |
| 304 | if (status->flag & RX_FLAG_SHORT_GI) |
| 305 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; |
| 306 | if (status->flag & RX_FLAG_40MHZ) |
| 307 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; |
Johannes Berg | ac55d2f | 2012-05-10 09:09:10 +0200 | [diff] [blame] | 308 | if (status->flag & RX_FLAG_HT_GF) |
| 309 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; |
Oleksij Rempel | 786677d | 2013-05-24 12:05:45 +0200 | [diff] [blame] | 310 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
| 311 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; |
Johannes Berg | 6d744ba | 2011-01-27 14:13:17 +0100 | [diff] [blame] | 312 | pos++; |
| 313 | *pos++ = status->rate_idx; |
| 314 | } |
Johannes Berg | 4c29867 | 2012-07-05 11:34:31 +0200 | [diff] [blame] | 315 | |
| 316 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
| 317 | u16 flags = 0; |
| 318 | |
| 319 | /* ensure 4 byte alignment */ |
| 320 | while ((pos - (u8 *)rthdr) & 3) |
| 321 | pos++; |
| 322 | rthdr->it_present |= |
| 323 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); |
| 324 | put_unaligned_le32(status->ampdu_reference, pos); |
| 325 | pos += 4; |
| 326 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) |
| 327 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; |
| 328 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) |
| 329 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; |
| 330 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) |
| 331 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; |
| 332 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) |
| 333 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; |
| 334 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) |
| 335 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; |
| 336 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) |
| 337 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; |
| 338 | put_unaligned_le16(flags, pos); |
| 339 | pos += 2; |
| 340 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) |
| 341 | *pos++ = status->ampdu_delimiter_crc; |
| 342 | else |
| 343 | *pos++ = 0; |
| 344 | *pos++ = 0; |
| 345 | } |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 346 | |
Johannes Berg | 5164892 | 2012-11-22 23:00:18 +0100 | [diff] [blame] | 347 | if (status->flag & RX_FLAG_VHT) { |
| 348 | u16 known = local->hw.radiotap_vht_details; |
| 349 | |
| 350 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); |
| 351 | /* known field - how to handle 80+80? */ |
| 352 | if (status->flag & RX_FLAG_80P80MHZ) |
| 353 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
| 354 | put_unaligned_le16(known, pos); |
| 355 | pos += 2; |
| 356 | /* flags */ |
| 357 | if (status->flag & RX_FLAG_SHORT_GI) |
| 358 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; |
| 359 | pos++; |
| 360 | /* bandwidth */ |
| 361 | if (status->flag & RX_FLAG_80MHZ) |
| 362 | *pos++ = 4; |
| 363 | else if (status->flag & RX_FLAG_80P80MHZ) |
| 364 | *pos++ = 0; /* marked not known above */ |
| 365 | else if (status->flag & RX_FLAG_160MHZ) |
| 366 | *pos++ = 11; |
| 367 | else if (status->flag & RX_FLAG_40MHZ) |
| 368 | *pos++ = 1; |
| 369 | else /* 20 MHz */ |
| 370 | *pos++ = 0; |
| 371 | /* MCS/NSS */ |
| 372 | *pos = (status->rate_idx << 4) | status->vht_nss; |
| 373 | pos += 4; |
| 374 | /* coding field */ |
| 375 | pos++; |
| 376 | /* group ID */ |
| 377 | pos++; |
| 378 | /* partial_aid */ |
| 379 | pos += 2; |
| 380 | } |
| 381 | |
Johannes Berg | a144f37 | 2013-07-03 13:34:02 +0200 | [diff] [blame] | 382 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
| 383 | *pos++ = status->chain_signal[chain]; |
| 384 | *pos++ = chain; |
| 385 | } |
| 386 | |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 387 | if (status->vendor_radiotap_len) { |
| 388 | /* ensure 2 byte alignment for the vendor field as required */ |
| 389 | if ((pos - (u8 *)rthdr) & 1) |
| 390 | *pos++ = 0; |
| 391 | *pos++ = status->vendor_radiotap_oui[0]; |
| 392 | *pos++ = status->vendor_radiotap_oui[1]; |
| 393 | *pos++ = status->vendor_radiotap_oui[2]; |
| 394 | *pos++ = status->vendor_radiotap_subns; |
| 395 | put_unaligned_le16(status->vendor_radiotap_len, pos); |
| 396 | pos += 2; |
| 397 | /* align the actual payload as requested */ |
| 398 | while ((pos - (u8 *)rthdr) & (status->vendor_radiotap_align - 1)) |
| 399 | *pos++ = 0; |
| 400 | } |
Bruno Randolf | 601ae7f | 2008-05-08 19:22:43 +0200 | [diff] [blame] | 401 | } |
| 402 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 403 | /* |
| 404 | * This function copies a received frame to all monitor interfaces and |
| 405 | * returns a cleaned-up SKB that no longer includes the FCS nor the |
| 406 | * radiotap header the driver might have added. |
| 407 | */ |
| 408 | static struct sk_buff * |
| 409 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 410 | struct ieee80211_rate *rate) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 411 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 412 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 413 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 414 | int needed_headroom; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 415 | struct sk_buff *skb, *skb2; |
| 416 | struct net_device *prev_dev = NULL; |
| 417 | int present_fcs_len = 0; |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 418 | |
| 419 | /* |
| 420 | * First, we may need to make a copy of the skb because |
| 421 | * (1) we need to modify it for radiotap (if not present), and |
| 422 | * (2) the other RX handlers will modify the skb we got. |
| 423 | * |
| 424 | * We don't need to, of course, if we aren't going to return |
| 425 | * the SKB because it has a bad FCS/PLCP checksum. |
| 426 | */ |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 427 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 428 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
| 429 | present_fcs_len = FCS_LEN; |
| 430 | |
Johannes Berg | 605f1a5 | 2012-11-22 10:20:58 +0100 | [diff] [blame] | 431 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
| 432 | if (!pskb_may_pull(origskb, 2 + status->vendor_radiotap_len)) { |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 433 | dev_kfree_skb(origskb); |
| 434 | return NULL; |
| 435 | } |
| 436 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 437 | if (!local->monitors) { |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 438 | if (should_drop_frame(origskb, present_fcs_len)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 439 | dev_kfree_skb(origskb); |
| 440 | return NULL; |
| 441 | } |
| 442 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 443 | return remove_monitor_info(local, origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 444 | } |
| 445 | |
Helmut Schaa | 751413e | 2012-12-05 14:36:12 +0100 | [diff] [blame] | 446 | /* room for the radiotap header based on driver features */ |
| 447 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
| 448 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 449 | if (should_drop_frame(origskb, present_fcs_len)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 450 | /* only need to expand headroom if necessary */ |
| 451 | skb = origskb; |
| 452 | origskb = NULL; |
| 453 | |
| 454 | /* |
| 455 | * This shouldn't trigger often because most devices have an |
| 456 | * RX header they pull before we get here, and that should |
| 457 | * be big enough for our radiotap information. We should |
| 458 | * probably export the length to drivers so that we can have |
| 459 | * them allocate enough headroom to start with. |
| 460 | */ |
| 461 | if (skb_headroom(skb) < needed_headroom && |
Johannes Berg | c49e5ea | 2007-12-11 21:33:42 +0100 | [diff] [blame] | 462 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 463 | dev_kfree_skb(skb); |
| 464 | return NULL; |
| 465 | } |
| 466 | } else { |
| 467 | /* |
| 468 | * Need to make a copy and possibly remove radiotap header |
| 469 | * and FCS from the original. |
| 470 | */ |
| 471 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); |
| 472 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 473 | origskb = remove_monitor_info(local, origskb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 474 | |
| 475 | if (!skb) |
| 476 | return origskb; |
| 477 | } |
| 478 | |
Johannes Berg | 0869aea | 2009-10-28 10:03:35 +0100 | [diff] [blame] | 479 | /* prepend radiotap information */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 480 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
| 481 | true); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 482 | |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 483 | skb_reset_mac_header(skb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 484 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 485 | skb->pkt_type = PACKET_OTHERHOST; |
| 486 | skb->protocol = htons(ETH_P_802_2); |
| 487 | |
| 488 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 489 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 490 | continue; |
| 491 | |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 492 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
| 493 | continue; |
| 494 | |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 495 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 496 | continue; |
| 497 | |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 498 | if (prev_dev) { |
| 499 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 500 | if (skb2) { |
| 501 | skb2->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 502 | netif_receive_skb(skb2); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 503 | } |
| 504 | } |
| 505 | |
| 506 | prev_dev = sdata->dev; |
| 507 | sdata->dev->stats.rx_packets++; |
| 508 | sdata->dev->stats.rx_bytes += skb->len; |
| 509 | } |
| 510 | |
| 511 | if (prev_dev) { |
| 512 | skb->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 513 | netif_receive_skb(skb); |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 514 | } else |
| 515 | dev_kfree_skb(skb); |
| 516 | |
| 517 | return origskb; |
| 518 | } |
| 519 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 520 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 521 | { |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 522 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 523 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 524 | int tid, seqno_idx, security_idx; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 525 | |
| 526 | /* does the frame have a qos control field? */ |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 527 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
| 528 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 529 | /* frame has qos control */ |
Harvey Harrison | 238f74a | 2008-07-02 11:05:34 -0700 | [diff] [blame] | 530 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
Johannes Berg | 04b7dcf | 2011-06-22 10:06:59 +0200 | [diff] [blame] | 531 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 532 | status->rx_flags |= IEEE80211_RX_AMSDU; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 533 | |
| 534 | seqno_idx = tid; |
| 535 | security_idx = tid; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 536 | } else { |
Johannes Berg | 1411f9b | 2008-07-10 10:11:02 +0200 | [diff] [blame] | 537 | /* |
| 538 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): |
| 539 | * |
| 540 | * Sequence numbers for management frames, QoS data |
| 541 | * frames with a broadcast/multicast address in the |
| 542 | * Address 1 field, and all non-QoS data frames sent |
| 543 | * by QoS STAs are assigned using an additional single |
| 544 | * modulo-4096 counter, [...] |
| 545 | * |
| 546 | * We also use that counter for non-QoS STAs. |
| 547 | */ |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 548 | seqno_idx = IEEE80211_NUM_TIDS; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 549 | security_idx = 0; |
| 550 | if (ieee80211_is_mgmt(hdr->frame_control)) |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 551 | security_idx = IEEE80211_NUM_TIDS; |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 552 | tid = 0; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 553 | } |
Johannes Berg | 52865dfd | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 554 | |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 555 | rx->seqno_idx = seqno_idx; |
| 556 | rx->security_idx = security_idx; |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 557 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
| 558 | * For now, set skb->priority to 0 for other cases. */ |
| 559 | rx->skb->priority = (tid > 7) ? 0 : tid; |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 560 | } |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 561 | |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 562 | /** |
| 563 | * DOC: Packet alignment |
| 564 | * |
| 565 | * Drivers always need to pass packets that are aligned to two-byte boundaries |
| 566 | * to the stack. |
| 567 | * |
| 568 | * Additionally, should, if possible, align the payload data in a way that |
| 569 | * guarantees that the contained IP header is aligned to a four-byte |
| 570 | * boundary. In the case of regular frames, this simply means aligning the |
| 571 | * payload to a four-byte boundary (because either the IP header is directly |
| 572 | * 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] | 573 | * in front of it). If the payload data is not properly aligned and the |
| 574 | * architecture doesn't support efficient unaligned operations, mac80211 |
| 575 | * will align the data. |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 576 | * |
| 577 | * With A-MSDU frames, however, the payload data address must yield two modulo |
| 578 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that |
| 579 | * push the IP header further back to a multiple of four again. Thankfully, the |
| 580 | * specs were sane enough this time around to require padding each A-MSDU |
| 581 | * subframe to a length that is a multiple of four. |
| 582 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 583 | * 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] | 584 | * the payload is not supported, the driver is required to move the 802.11 |
| 585 | * header to be directly in front of the payload in that case. |
| 586 | */ |
| 587 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 588 | { |
Kalle Valo | 59d9cb0 | 2009-12-17 13:54:57 +0100 | [diff] [blame] | 589 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 590 | WARN_ONCE((unsigned long)rx->skb->data & 1, |
| 591 | "unaligned packet at 0x%p\n", rx->skb->data); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 592 | #endif |
Johannes Berg | 6e0d114 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 593 | } |
| 594 | |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 595 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 596 | /* rx handlers */ |
| 597 | |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 598 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
| 599 | { |
| 600 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 601 | |
| 602 | if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1)) |
| 603 | return 0; |
| 604 | |
| 605 | return ieee80211_is_robust_mgmt_frame(hdr); |
| 606 | } |
| 607 | |
| 608 | |
| 609 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) |
| 610 | { |
| 611 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 612 | |
| 613 | if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1)) |
| 614 | return 0; |
| 615 | |
| 616 | return ieee80211_is_robust_mgmt_frame(hdr); |
| 617 | } |
| 618 | |
| 619 | |
| 620 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ |
| 621 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) |
| 622 | { |
| 623 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; |
| 624 | struct ieee80211_mmie *mmie; |
| 625 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 626 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 627 | return -1; |
| 628 | |
| 629 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr)) |
| 630 | return -1; /* not a robust management frame */ |
| 631 | |
| 632 | mmie = (struct ieee80211_mmie *) |
| 633 | (skb->data + skb->len - sizeof(*mmie)); |
| 634 | if (mmie->element_id != WLAN_EID_MMIE || |
| 635 | mmie->length != sizeof(*mmie) - 2) |
| 636 | return -1; |
| 637 | |
| 638 | return le16_to_cpu(mmie->key_id); |
| 639 | } |
| 640 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame^] | 641 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
| 642 | struct sk_buff *skb) |
| 643 | { |
| 644 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 645 | __le16 fc; |
| 646 | int hdrlen; |
| 647 | u8 keyid; |
| 648 | |
| 649 | fc = hdr->frame_control; |
| 650 | hdrlen = ieee80211_hdrlen(fc); |
| 651 | |
| 652 | if (skb->len < hdrlen + cs->hdr_len) |
| 653 | return -EINVAL; |
| 654 | |
| 655 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); |
| 656 | keyid &= cs->key_idx_mask; |
| 657 | keyid >>= cs->key_idx_shift; |
| 658 | |
| 659 | return keyid; |
| 660 | } |
| 661 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 662 | 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] | 663 | { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 664 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 665 | char *dev_addr = rx->sdata->vif.addr; |
Johannes Berg | d6d1a5a | 2008-02-25 16:24:38 +0100 | [diff] [blame] | 666 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 667 | if (ieee80211_is_data(hdr->frame_control)) { |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 668 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 669 | if (ieee80211_has_tods(hdr->frame_control) || |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 670 | !ieee80211_has_fromds(hdr->frame_control)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 671 | return RX_DROP_MONITOR; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 672 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 673 | return RX_DROP_MONITOR; |
| 674 | } else { |
| 675 | if (!ieee80211_has_a4(hdr->frame_control)) |
| 676 | return RX_DROP_MONITOR; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 677 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 678 | return RX_DROP_MONITOR; |
| 679 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 680 | } |
| 681 | |
| 682 | /* If there is not an established peer link and this is not a peer link |
| 683 | * establisment frame, beacon or probe, drop the frame. |
| 684 | */ |
| 685 | |
Javier Cardona | 57cf804 | 2011-05-13 10:45:43 -0700 | [diff] [blame] | 686 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 687 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | d6d1a5a | 2008-02-25 16:24:38 +0100 | [diff] [blame] | 688 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 689 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 690 | return RX_DROP_MONITOR; |
| 691 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 692 | if (ieee80211_is_action(hdr->frame_control)) { |
Javier Cardona | d3aaec8a | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 693 | u8 category; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 694 | |
| 695 | /* make sure category field is present */ |
| 696 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) |
| 697 | return RX_DROP_MONITOR; |
| 698 | |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 699 | mgmt = (struct ieee80211_mgmt *)hdr; |
Javier Cardona | d3aaec8a | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 700 | category = mgmt->u.action.category; |
| 701 | if (category != WLAN_CATEGORY_MESH_ACTION && |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 702 | category != WLAN_CATEGORY_SELF_PROTECTED) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 703 | return RX_DROP_MONITOR; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 704 | return RX_CONTINUE; |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 705 | } |
| 706 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 707 | if (ieee80211_is_probe_req(hdr->frame_control) || |
| 708 | ieee80211_is_probe_resp(hdr->frame_control) || |
Javier Cardona | 7183912 | 2011-04-07 15:08:31 -0700 | [diff] [blame] | 709 | ieee80211_is_beacon(hdr->frame_control) || |
| 710 | ieee80211_is_auth(hdr->frame_control)) |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 711 | return RX_CONTINUE; |
| 712 | |
| 713 | return RX_DROP_MONITOR; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 714 | } |
| 715 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 716 | return RX_CONTINUE; |
| 717 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 718 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 719 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 720 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 721 | int index, |
| 722 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 723 | { |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 724 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 725 | struct ieee80211_rx_status *status; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 726 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 727 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 728 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 729 | if (!skb) |
| 730 | goto no_frame; |
| 731 | |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 732 | /* release the frame from the reorder ring buffer */ |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 733 | tid_agg_rx->stored_mpdu_num--; |
| 734 | tid_agg_rx->reorder_buf[index] = NULL; |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 735 | status = IEEE80211_SKB_RXCB(skb); |
| 736 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 737 | __skb_queue_tail(frames, skb); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 738 | |
| 739 | no_frame: |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 740 | 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] | 741 | } |
| 742 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 743 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 744 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 745 | u16 head_seq_num, |
| 746 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 747 | { |
| 748 | int index; |
| 749 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 750 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 751 | |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 752 | 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] | 753 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 754 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
| 755 | frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 756 | } |
| 757 | } |
| 758 | |
| 759 | /* |
| 760 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If |
| 761 | * the skb was added to the buffer longer than this time ago, the earlier |
| 762 | * frames that have not yet been received are assumed to be lost and the skb |
| 763 | * can be released for processing. This may also release other skb's from the |
| 764 | * reorder buffer if there are no additional gaps between the frames. |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 765 | * |
| 766 | * Callers must hold tid_agg_rx->reorder_lock. |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 767 | */ |
| 768 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) |
| 769 | |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 770 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 771 | struct tid_ampdu_rx *tid_agg_rx, |
| 772 | struct sk_buff_head *frames) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 773 | { |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 774 | int index, j; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 775 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 776 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
| 777 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 778 | /* release the buffer until next missing frame */ |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 779 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 780 | if (!tid_agg_rx->reorder_buf[index] && |
Eliad Peller | 07ae2df | 2012-02-01 18:48:09 +0200 | [diff] [blame] | 781 | tid_agg_rx->stored_mpdu_num) { |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 782 | /* |
| 783 | * No buffers ready to be released, but check whether any |
| 784 | * frames in the reorder buffer have timed out. |
| 785 | */ |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 786 | int skipped = 1; |
| 787 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; |
| 788 | j = (j + 1) % tid_agg_rx->buf_size) { |
| 789 | if (!tid_agg_rx->reorder_buf[j]) { |
| 790 | skipped++; |
| 791 | continue; |
| 792 | } |
Daniel Halperin | 499fe9a | 2011-03-24 16:01:48 -0700 | [diff] [blame] | 793 | if (skipped && |
| 794 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 795 | HT_RX_REORDER_BUF_TIMEOUT)) |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 796 | goto set_release_timer; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 797 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 798 | ht_dbg_ratelimited(sdata, |
| 799 | "release an RX reorder frame due to timeout on earlier frames\n"); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 800 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
| 801 | frames); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 802 | |
| 803 | /* |
| 804 | * Increment the head seq# also for the skipped slots. |
| 805 | */ |
| 806 | tid_agg_rx->head_seq_num = |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 807 | (tid_agg_rx->head_seq_num + |
| 808 | skipped) & IEEE80211_SN_MASK; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 809 | skipped = 0; |
| 810 | } |
| 811 | } else while (tid_agg_rx->reorder_buf[index]) { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 812 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
| 813 | frames); |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 814 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 815 | } |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 816 | |
| 817 | if (tid_agg_rx->stored_mpdu_num) { |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 818 | 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] | 819 | |
| 820 | for (; j != (index - 1) % tid_agg_rx->buf_size; |
| 821 | j = (j + 1) % tid_agg_rx->buf_size) { |
| 822 | if (tid_agg_rx->reorder_buf[j]) |
| 823 | break; |
| 824 | } |
| 825 | |
| 826 | set_release_timer: |
| 827 | |
| 828 | mod_timer(&tid_agg_rx->reorder_timer, |
Christian Lamparter | 334df73 | 2011-04-24 20:41:16 +0200 | [diff] [blame] | 829 | tid_agg_rx->reorder_time[j] + 1 + |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 830 | HT_RX_REORDER_BUF_TIMEOUT); |
| 831 | } else { |
| 832 | del_timer(&tid_agg_rx->reorder_timer); |
| 833 | } |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 834 | } |
| 835 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 836 | /* |
| 837 | * As this function belongs to the RX path it must be under |
| 838 | * rcu_read_lock protection. It returns false if the frame |
| 839 | * can be processed immediately, true if it was consumed. |
| 840 | */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 841 | 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] | 842 | struct tid_ampdu_rx *tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 843 | struct sk_buff *skb, |
| 844 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 845 | { |
| 846 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 847 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
| 848 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; |
| 849 | u16 head_seq_num, buf_size; |
| 850 | int index; |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 851 | bool ret = true; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 852 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 853 | spin_lock(&tid_agg_rx->reorder_lock); |
| 854 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 855 | buf_size = tid_agg_rx->buf_size; |
| 856 | head_seq_num = tid_agg_rx->head_seq_num; |
| 857 | |
| 858 | /* frame with out of date sequence number */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 859 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 860 | dev_kfree_skb(skb); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 861 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | /* |
| 865 | * If frame the sequence number exceeds our buffering window |
| 866 | * size release some previous frames to make room for this one. |
| 867 | */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 868 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
| 869 | head_seq_num = ieee80211_sn_inc( |
| 870 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 871 | /* release stored frames up to new head to stack */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 872 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 873 | head_seq_num, frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 874 | } |
| 875 | |
| 876 | /* Now the new frame is always in the range of the reordering buffer */ |
| 877 | |
Karl Beldan | 2e3049b | 2013-10-24 15:53:32 +0200 | [diff] [blame] | 878 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 879 | |
| 880 | /* check if we already stored this frame */ |
| 881 | if (tid_agg_rx->reorder_buf[index]) { |
| 882 | dev_kfree_skb(skb); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 883 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 884 | } |
| 885 | |
| 886 | /* |
| 887 | * If the current MPDU is in the right order and nothing else |
| 888 | * is stored we can process it directly, no need to buffer it. |
Johannes Berg | c835b21 | 2011-03-15 23:17:01 +0100 | [diff] [blame] | 889 | * If it is first but there's something stored, we may be able |
| 890 | * to release frames after this one. |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 891 | */ |
| 892 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && |
| 893 | tid_agg_rx->stored_mpdu_num == 0) { |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 894 | tid_agg_rx->head_seq_num = |
| 895 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 896 | ret = false; |
| 897 | goto out; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 898 | } |
| 899 | |
| 900 | /* put the frame in the reordering buffer */ |
| 901 | tid_agg_rx->reorder_buf[index] = skb; |
| 902 | tid_agg_rx->reorder_time[index] = jiffies; |
| 903 | tid_agg_rx->stored_mpdu_num++; |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 904 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 905 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 906 | out: |
| 907 | spin_unlock(&tid_agg_rx->reorder_lock); |
| 908 | return ret; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 909 | } |
| 910 | |
| 911 | /* |
| 912 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns |
| 913 | * true if the MPDU was buffered, false if it should be processed. |
| 914 | */ |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 915 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
| 916 | struct sk_buff_head *frames) |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 917 | { |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 918 | struct sk_buff *skb = rx->skb; |
| 919 | struct ieee80211_local *local = rx->local; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 920 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
Thomas Pedersen | 660c6a4 | 2011-11-03 21:11:12 -0700 | [diff] [blame] | 921 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 922 | struct sta_info *sta = rx->sta; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 923 | struct tid_ampdu_rx *tid_agg_rx; |
| 924 | u16 sc; |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 925 | u8 tid, ack_policy; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 926 | |
| 927 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 928 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 929 | |
| 930 | /* |
| 931 | * filter the QoS data rx stream according to |
| 932 | * STA/TID and check if this STA/TID is on aggregation |
| 933 | */ |
| 934 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 935 | if (!sta) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 936 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 937 | |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 938 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
| 939 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 940 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
| 941 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 942 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
| 943 | if (!tid_agg_rx) |
| 944 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 945 | |
| 946 | /* qos null data frames are excluded */ |
| 947 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 948 | goto dont_reorder; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 949 | |
Thomas Pedersen | 6cc00d5 | 2011-11-03 21:11:11 -0700 | [diff] [blame] | 950 | /* not part of a BA session */ |
| 951 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && |
| 952 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) |
| 953 | goto dont_reorder; |
| 954 | |
Thomas Pedersen | 660c6a4 | 2011-11-03 21:11:12 -0700 | [diff] [blame] | 955 | /* not actually part of this BA session */ |
| 956 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 957 | goto dont_reorder; |
| 958 | |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 959 | /* new, potentially un-ordered, ampdu frame - process it */ |
| 960 | |
| 961 | /* reset session timer */ |
| 962 | if (tid_agg_rx->timeout) |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 963 | tid_agg_rx->last_rx = jiffies; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 964 | |
| 965 | /* if this mpdu is fragmented - terminate rx aggregation session */ |
| 966 | sc = le16_to_cpu(hdr->seq_ctrl); |
| 967 | if (sc & IEEE80211_SCTL_FRAG) { |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 968 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
Johannes Berg | 344eec6 | 2010-06-10 10:21:36 +0200 | [diff] [blame] | 969 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
| 970 | ieee80211_queue_work(&local->hw, &rx->sdata->work); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 971 | return; |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 972 | } |
| 973 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 974 | /* |
| 975 | * No locking needed -- we will only ever process one |
| 976 | * RX packet at a time, and thus own tid_agg_rx. All |
| 977 | * other code manipulating it needs to (and does) make |
| 978 | * sure that we cannot get to it any more before doing |
| 979 | * anything with it. |
| 980 | */ |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 981 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
| 982 | frames)) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 983 | return; |
| 984 | |
| 985 | dont_reorder: |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 986 | __skb_queue_tail(frames, skb); |
Johannes Berg | 1edfb1a | 2009-11-25 17:46:16 +0100 | [diff] [blame] | 987 | } |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 988 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 989 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 990 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 991 | { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 992 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 993 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 994 | |
Johannes Berg | 6b0f327 | 2013-07-11 22:33:26 +0200 | [diff] [blame] | 995 | /* |
| 996 | * Drop duplicate 802.11 retransmissions |
| 997 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") |
| 998 | */ |
| 999 | if (rx->skb->len >= 24 && rx->sta && |
| 1000 | !ieee80211_is_ctl(hdr->frame_control) && |
| 1001 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
| 1002 | !is_multicast_ether_addr(hdr->addr1)) { |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 1003 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1004 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1005 | hdr->seq_ctrl)) { |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1006 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1007 | rx->local->dot11FrameDuplicateCount++; |
| 1008 | rx->sta->num_duplicates++; |
| 1009 | } |
Felix Fietkau | b1f9331 | 2011-02-04 19:20:08 +0100 | [diff] [blame] | 1010 | return RX_DROP_UNUSABLE; |
Michal Kazior | 0cfcefe | 2013-09-23 15:34:38 +0200 | [diff] [blame] | 1011 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1012 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
Michal Kazior | 0cfcefe | 2013-09-23 15:34:38 +0200 | [diff] [blame] | 1013 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1014 | } |
| 1015 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1016 | if (unlikely(rx->skb->len < 16)) { |
| 1017 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1018 | return RX_DROP_MONITOR; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1019 | } |
| 1020 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1021 | /* Drop disallowed frame classes based on STA auth/assoc state; |
| 1022 | * IEEE 802.11, Chap 5.5. |
| 1023 | * |
Johannes Berg | ccd7b36 | 2008-09-11 00:01:56 +0200 | [diff] [blame] | 1024 | * mac80211 filters only based on association state, i.e. it drops |
| 1025 | * Class 3 frames from not associated stations. hostapd sends |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1026 | * deauth/disassoc frames when needed. In addition, hostapd is |
| 1027 | * responsible for filtering on both auth and assoc states. |
| 1028 | */ |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1029 | |
Johannes Berg | 902acc7 | 2008-02-23 15:17:19 +0100 | [diff] [blame] | 1030 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1031 | return ieee80211_rx_mesh_check(rx); |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1032 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 1033 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
| 1034 | ieee80211_is_pspoll(hdr->frame_control)) && |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1035 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
Bill Jordan | 1be7fe8 | 2010-10-01 11:20:41 -0400 | [diff] [blame] | 1036 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1037 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 1038 | /* |
| 1039 | * accept port control frames from the AP even when it's not |
| 1040 | * yet marked ASSOC to prevent a race where we don't set the |
| 1041 | * assoc bit quickly enough before it sends the first frame |
| 1042 | */ |
| 1043 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1044 | ieee80211_is_data_present(hdr->frame_control)) { |
Johannes Berg | 6dbda2d | 2012-10-26 00:41:23 +0200 | [diff] [blame] | 1045 | unsigned int hdrlen; |
| 1046 | __be16 ethertype; |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1047 | |
Johannes Berg | 6dbda2d | 2012-10-26 00:41:23 +0200 | [diff] [blame] | 1048 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| 1049 | |
| 1050 | if (rx->skb->len < hdrlen + 8) |
| 1051 | return RX_DROP_MONITOR; |
| 1052 | |
| 1053 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); |
| 1054 | if (ethertype == rx->sdata->control_port_protocol) |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1055 | return RX_CONTINUE; |
| 1056 | } |
Johannes Berg | 21fc756 | 2011-11-04 11:18:13 +0100 | [diff] [blame] | 1057 | |
| 1058 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 1059 | cfg80211_rx_spurious_frame(rx->sdata->dev, |
| 1060 | hdr->addr2, |
| 1061 | GFP_ATOMIC)) |
| 1062 | return RX_DROP_UNUSABLE; |
| 1063 | |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1064 | return RX_DROP_MONITOR; |
Guy Eilam | 2a33bee | 2011-08-17 15:18:15 +0300 | [diff] [blame] | 1065 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1066 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1067 | return RX_CONTINUE; |
Johannes Berg | 570bd53 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1068 | } |
| 1069 | |
| 1070 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1071 | static ieee80211_rx_result debug_noinline |
Kalle Valo | 572e001 | 2009-02-10 17:09:31 +0200 | [diff] [blame] | 1072 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) |
| 1073 | { |
| 1074 | struct ieee80211_local *local; |
| 1075 | struct ieee80211_hdr *hdr; |
| 1076 | struct sk_buff *skb; |
| 1077 | |
| 1078 | local = rx->local; |
| 1079 | skb = rx->skb; |
| 1080 | hdr = (struct ieee80211_hdr *) skb->data; |
| 1081 | |
| 1082 | if (!local->pspolling) |
| 1083 | return RX_CONTINUE; |
| 1084 | |
| 1085 | if (!ieee80211_has_fromds(hdr->frame_control)) |
| 1086 | /* this is not from AP */ |
| 1087 | return RX_CONTINUE; |
| 1088 | |
| 1089 | if (!ieee80211_is_data(hdr->frame_control)) |
| 1090 | return RX_CONTINUE; |
| 1091 | |
| 1092 | if (!ieee80211_has_moredata(hdr->frame_control)) { |
| 1093 | /* AP has no more frames buffered for us */ |
| 1094 | local->pspolling = false; |
| 1095 | return RX_CONTINUE; |
| 1096 | } |
| 1097 | |
| 1098 | /* more data bit is set, let's request a new frame from the AP */ |
| 1099 | ieee80211_send_pspoll(local, rx->sdata); |
| 1100 | |
| 1101 | return RX_CONTINUE; |
| 1102 | } |
| 1103 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1104 | static void sta_ps_start(struct sta_info *sta) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1105 | { |
Johannes Berg | 133b822 | 2008-09-16 14:18:59 +0200 | [diff] [blame] | 1106 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Christian Lamparter | 4571d3b | 2008-11-30 00:48:41 +0100 | [diff] [blame] | 1107 | struct ieee80211_local *local = sdata->local; |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1108 | struct ps_data *ps; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1109 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1110 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
| 1111 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 1112 | ps = &sdata->bss->ps; |
| 1113 | else |
| 1114 | return; |
| 1115 | |
| 1116 | atomic_inc(&ps->num_sta_ps); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1117 | set_sta_flag(sta, WLAN_STA_PS_STA); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1118 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
| 1119 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1120 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
| 1121 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1122 | } |
| 1123 | |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1124 | static void sta_ps_end(struct sta_info *sta) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1125 | { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1126 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
| 1127 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | 004c872 | 2008-02-20 11:21:35 +0100 | [diff] [blame] | 1128 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1129 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1130 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
| 1131 | sta->sta.addr, sta->sta.aid); |
Johannes Berg | af81858 | 2009-11-06 11:35:50 +0100 | [diff] [blame] | 1132 | return; |
| 1133 | } |
| 1134 | |
| 1135 | ieee80211_sta_ps_deliver_wakeup(sta); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1136 | } |
| 1137 | |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1138 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
| 1139 | { |
| 1140 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); |
| 1141 | bool in_ps; |
| 1142 | |
| 1143 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); |
| 1144 | |
| 1145 | /* Don't let the same PS state be set twice */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1146 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1147 | if ((start && in_ps) || (!start && !in_ps)) |
| 1148 | return -EINVAL; |
| 1149 | |
| 1150 | if (start) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1151 | sta_ps_start(sta_inf); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1152 | else |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1153 | sta_ps_end(sta_inf); |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1154 | |
| 1155 | return 0; |
| 1156 | } |
| 1157 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); |
| 1158 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1159 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1160 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) |
| 1161 | { |
| 1162 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1163 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; |
| 1164 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
| 1165 | int tid, ac; |
| 1166 | |
| 1167 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 1168 | return RX_CONTINUE; |
| 1169 | |
| 1170 | if (sdata->vif.type != NL80211_IFTYPE_AP && |
| 1171 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) |
| 1172 | return RX_CONTINUE; |
| 1173 | |
| 1174 | /* |
| 1175 | * The device handles station powersave, so don't do anything about |
| 1176 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from |
| 1177 | * it to mac80211 since they're handled.) |
| 1178 | */ |
| 1179 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) |
| 1180 | return RX_CONTINUE; |
| 1181 | |
| 1182 | /* |
| 1183 | * Don't do anything if the station isn't already asleep. In |
| 1184 | * the uAPSD case, the station will probably be marked asleep, |
| 1185 | * in the PS-Poll case the station must be confused ... |
| 1186 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1187 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1188 | return RX_CONTINUE; |
| 1189 | |
| 1190 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1191 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
| 1192 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
Johannes Berg | deeaee1 | 2011-09-29 16:04:35 +0200 | [diff] [blame] | 1193 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
| 1194 | else |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1195 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
Johannes Berg | deeaee1 | 2011-09-29 16:04:35 +0200 | [diff] [blame] | 1196 | } |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1197 | |
| 1198 | /* Free PS Poll skb here instead of returning RX_DROP that would |
| 1199 | * count as an dropped frame. */ |
| 1200 | dev_kfree_skb(rx->skb); |
| 1201 | |
| 1202 | return RX_QUEUED; |
| 1203 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && |
| 1204 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
| 1205 | ieee80211_has_pm(hdr->frame_control) && |
| 1206 | (ieee80211_is_data_qos(hdr->frame_control) || |
| 1207 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { |
| 1208 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
| 1209 | ac = ieee802_1d_to_ac[tid & 7]; |
| 1210 | |
| 1211 | /* |
| 1212 | * If this AC is not trigger-enabled do nothing. |
| 1213 | * |
| 1214 | * NB: This could/should check a separate bitmap of trigger- |
| 1215 | * enabled queues, but for now we only implement uAPSD w/o |
| 1216 | * TSPEC changes to the ACs, so they're always the same. |
| 1217 | */ |
| 1218 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) |
| 1219 | return RX_CONTINUE; |
| 1220 | |
| 1221 | /* if we are in a service period, do nothing */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1222 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1223 | return RX_CONTINUE; |
| 1224 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1225 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1226 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
| 1227 | else |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1228 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | return RX_CONTINUE; |
| 1232 | } |
| 1233 | |
| 1234 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1235 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1236 | { |
| 1237 | struct sta_info *sta = rx->sta; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1238 | struct sk_buff *skb = rx->skb; |
| 1239 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1240 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | ef0621e | 2013-04-22 16:29:31 +0200 | [diff] [blame] | 1241 | int i; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1242 | |
| 1243 | if (!sta) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1244 | return RX_CONTINUE; |
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 | /* |
| 1247 | * Update last_rx only for IBSS packets which are for the current |
Antonio Quartulli | e584da5e | 2012-11-25 23:13:42 +0100 | [diff] [blame] | 1248 | * BSSID and for station already AUTHORIZED to avoid keeping the |
| 1249 | * current IBSS network alive in cases where other STAs start |
| 1250 | * using different BSSID. This will also give the station another |
| 1251 | * chance to restart the authentication/authorization in case |
| 1252 | * something went wrong the first time. |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1253 | */ |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1254 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 1255 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1256 | NL80211_IFTYPE_ADHOC); |
Antonio Quartulli | e584da5e | 2012-11-25 23:13:42 +0100 | [diff] [blame] | 1257 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
| 1258 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1259 | sta->last_rx = jiffies; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1260 | if (ieee80211_is_data(hdr->frame_control)) { |
| 1261 | sta->last_rx_rate_idx = status->rate_idx; |
| 1262 | sta->last_rx_rate_flag = status->flag; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 1263 | sta->last_rx_rate_vht_nss = status->vht_nss; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1264 | } |
| 1265 | } |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1266 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
| 1267 | /* |
Luis Carlos Cobo | 33b64eb | 2008-02-23 15:17:10 +0100 | [diff] [blame] | 1268 | * Mesh beacons will update last_rx when if they are found to |
| 1269 | * match the current local configuration when processed. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1270 | */ |
Johannes Berg | b291ba1 | 2009-07-10 15:29:03 +0200 | [diff] [blame] | 1271 | sta->last_rx = jiffies; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1272 | if (ieee80211_is_data(hdr->frame_control)) { |
| 1273 | sta->last_rx_rate_idx = status->rate_idx; |
| 1274 | sta->last_rx_rate_flag = status->flag; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 1275 | sta->last_rx_rate_vht_nss = status->vht_nss; |
Felix Fietkau | 3af6334 | 2011-02-27 22:08:01 +0100 | [diff] [blame] | 1276 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1277 | } |
| 1278 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1279 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1280 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1281 | |
Kalle Valo | 3cf335d | 2009-03-22 21:57:06 +0200 | [diff] [blame] | 1282 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
| 1283 | ieee80211_sta_rx_notify(rx->sdata, hdr); |
| 1284 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1285 | sta->rx_fragments++; |
| 1286 | sta->rx_bytes += rx->skb->len; |
Felix Fietkau | fe8431f | 2012-03-01 18:00:07 +0100 | [diff] [blame] | 1287 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
| 1288 | sta->last_signal = status->signal; |
| 1289 | ewma_add(&sta->avg_signal, -status->signal); |
| 1290 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1291 | |
Felix Fietkau | ef0621e | 2013-04-22 16:29:31 +0200 | [diff] [blame] | 1292 | if (status->chains) { |
| 1293 | sta->chains = status->chains; |
| 1294 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { |
| 1295 | int signal = status->chain_signal[i]; |
| 1296 | |
| 1297 | if (!(status->chains & BIT(i))) |
| 1298 | continue; |
| 1299 | |
| 1300 | sta->chain_signal_last[i] = signal; |
| 1301 | ewma_add(&sta->chain_signal_avg[i], -signal); |
| 1302 | } |
| 1303 | } |
| 1304 | |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1305 | /* |
| 1306 | * Change STA power saving mode only at the end of a frame |
| 1307 | * exchange sequence. |
| 1308 | */ |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 1309 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
| 1310 | !ieee80211_has_morefrags(hdr->frame_control) && |
Christian Lamparter | 4cfda47 | 2010-12-27 23:21:26 +0100 | [diff] [blame] | 1311 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1312 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
| 1313 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) { |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1314 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1315 | /* |
| 1316 | * Ignore doze->wake transitions that are |
| 1317 | * indicated by non-data frames, the standard |
| 1318 | * is unclear here, but for example going to |
| 1319 | * PS mode and then scanning would cause a |
| 1320 | * doze->wake transition for the probe request, |
| 1321 | * and that is clearly undesirable. |
| 1322 | */ |
| 1323 | if (ieee80211_is_data(hdr->frame_control) && |
| 1324 | !ieee80211_has_pm(hdr->frame_control)) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1325 | sta_ps_end(sta); |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1326 | } else { |
| 1327 | if (ieee80211_has_pm(hdr->frame_control)) |
Marco Porsch | d012a60 | 2012-10-10 12:39:50 -0700 | [diff] [blame] | 1328 | sta_ps_start(sta); |
Johannes Berg | 72eaa43 | 2008-11-26 15:02:58 +0100 | [diff] [blame] | 1329 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1330 | } |
| 1331 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 1332 | /* mesh power save support */ |
| 1333 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
| 1334 | ieee80211_mps_rx_h_sta_process(sta, hdr); |
| 1335 | |
Johannes Berg | 22403de | 2009-10-30 12:55:03 +0100 | [diff] [blame] | 1336 | /* |
| 1337 | * Drop (qos-)data::nullfunc frames silently, since they |
| 1338 | * are used only to control station power saving mode. |
| 1339 | */ |
| 1340 | if (ieee80211_is_nullfunc(hdr->frame_control) || |
| 1341 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1342 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1343 | |
| 1344 | /* |
| 1345 | * If we receive a 4-addr nullfunc frame from a STA |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1346 | * that was not moved to a 4-addr STA vlan yet send |
| 1347 | * the event to userspace and for older hostapd drop |
| 1348 | * the frame to the monitor interface. |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1349 | */ |
| 1350 | if (ieee80211_has_a4(hdr->frame_control) && |
| 1351 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
| 1352 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1353 | !rx->sdata->u.vlan.sta))) { |
| 1354 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) |
| 1355 | cfg80211_rx_unexpected_4addr_frame( |
| 1356 | rx->sdata->dev, sta->sta.addr, |
| 1357 | GFP_ATOMIC); |
Felix Fietkau | d524215 | 2010-01-08 18:06:26 +0100 | [diff] [blame] | 1358 | return RX_DROP_MONITOR; |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 1359 | } |
Johannes Berg | 22403de | 2009-10-30 12:55:03 +0100 | [diff] [blame] | 1360 | /* |
| 1361 | * Update counter and free packet here to avoid |
| 1362 | * counting this as a dropped packed. |
| 1363 | */ |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1364 | sta->rx_packets++; |
| 1365 | dev_kfree_skb(rx->skb); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1366 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1367 | } |
| 1368 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1369 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1370 | } /* ieee80211_rx_h_sta_process */ |
| 1371 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1372 | static ieee80211_rx_result debug_noinline |
| 1373 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) |
| 1374 | { |
| 1375 | struct sk_buff *skb = rx->skb; |
| 1376 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1377 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 1378 | int keyidx; |
| 1379 | int hdrlen; |
| 1380 | ieee80211_rx_result result = RX_DROP_UNUSABLE; |
| 1381 | struct ieee80211_key *sta_ptk = NULL; |
| 1382 | int mmie_keyidx = -1; |
| 1383 | __le16 fc; |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame^] | 1384 | const struct ieee80211_cipher_scheme *cs = NULL; |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1385 | |
| 1386 | /* |
| 1387 | * Key selection 101 |
| 1388 | * |
| 1389 | * There are four types of keys: |
| 1390 | * - GTK (group keys) |
| 1391 | * - IGTK (group keys for management frames) |
| 1392 | * - PTK (pairwise keys) |
| 1393 | * - STK (station-to-station pairwise keys) |
| 1394 | * |
| 1395 | * When selecting a key, we have to distinguish between multicast |
| 1396 | * (including broadcast) and unicast frames, the latter can only |
| 1397 | * use PTKs and STKs while the former always use GTKs and IGTKs. |
| 1398 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then |
| 1399 | * unicast frames can also use key indices like GTKs. Hence, if we |
| 1400 | * don't have a PTK/STK we check the key index for a WEP key. |
| 1401 | * |
| 1402 | * Note that in a regular BSS, multicast frames are sent by the |
| 1403 | * AP only, associated stations unicast the frame to the AP first |
| 1404 | * which then multicasts it on their behalf. |
| 1405 | * |
| 1406 | * There is also a slight problem in IBSS mode: GTKs are negotiated |
| 1407 | * with each station, that is something we don't currently handle. |
| 1408 | * The spec seems to expect that one negotiates the same key with |
| 1409 | * every station but there's no such requirement; VLANs could be |
| 1410 | * possible. |
| 1411 | */ |
| 1412 | |
| 1413 | /* |
| 1414 | * No point in finding a key and decrypting if the frame is neither |
| 1415 | * addressed to us nor a multicast frame. |
| 1416 | */ |
| 1417 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
| 1418 | return RX_CONTINUE; |
| 1419 | |
| 1420 | /* start without a key */ |
| 1421 | rx->key = NULL; |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1422 | fc = hdr->frame_control; |
| 1423 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame^] | 1424 | if (rx->sta) { |
| 1425 | int keyid = rx->sta->ptk_idx; |
| 1426 | |
| 1427 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
| 1428 | cs = rx->sta->cipher_scheme; |
| 1429 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); |
| 1430 | if (unlikely(keyid < 0)) |
| 1431 | return RX_DROP_UNUSABLE; |
| 1432 | } |
| 1433 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); |
| 1434 | } |
| 1435 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1436 | if (!ieee80211_has_protected(fc)) |
| 1437 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); |
| 1438 | |
| 1439 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { |
| 1440 | rx->key = sta_ptk; |
| 1441 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1442 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1443 | return RX_CONTINUE; |
| 1444 | /* Skip decryption if the frame is not protected. */ |
| 1445 | if (!ieee80211_has_protected(fc)) |
| 1446 | return RX_CONTINUE; |
| 1447 | } else if (mmie_keyidx >= 0) { |
| 1448 | /* Broadcast/multicast robust management frame / BIP */ |
| 1449 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1450 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1451 | return RX_CONTINUE; |
| 1452 | |
| 1453 | if (mmie_keyidx < NUM_DEFAULT_KEYS || |
| 1454 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) |
| 1455 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ |
| 1456 | if (rx->sta) |
| 1457 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); |
| 1458 | if (!rx->key) |
| 1459 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); |
| 1460 | } else if (!ieee80211_has_protected(fc)) { |
| 1461 | /* |
| 1462 | * The frame was not protected, so skip decryption. However, we |
| 1463 | * need to set rx->key if there is a key that could have been |
| 1464 | * used so that the frame may be dropped if encryption would |
| 1465 | * have been expected. |
| 1466 | */ |
| 1467 | struct ieee80211_key *key = NULL; |
| 1468 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1469 | int i; |
| 1470 | |
| 1471 | if (ieee80211_is_mgmt(fc) && |
| 1472 | is_multicast_ether_addr(hdr->addr1) && |
| 1473 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) |
| 1474 | rx->key = key; |
| 1475 | else { |
| 1476 | if (rx->sta) { |
| 1477 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
| 1478 | key = rcu_dereference(rx->sta->gtk[i]); |
| 1479 | if (key) |
| 1480 | break; |
| 1481 | } |
| 1482 | } |
| 1483 | if (!key) { |
| 1484 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
| 1485 | key = rcu_dereference(sdata->keys[i]); |
| 1486 | if (key) |
| 1487 | break; |
| 1488 | } |
| 1489 | } |
| 1490 | if (key) |
| 1491 | rx->key = key; |
| 1492 | } |
| 1493 | return RX_CONTINUE; |
| 1494 | } else { |
| 1495 | u8 keyid; |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame^] | 1496 | |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1497 | /* |
| 1498 | * The device doesn't give us the IV so we won't be |
| 1499 | * able to look up the key. That's ok though, we |
| 1500 | * don't need to decrypt the frame, we just won't |
| 1501 | * be able to keep statistics accurate. |
| 1502 | * Except for key threshold notifications, should |
| 1503 | * we somehow allow the driver to tell us which key |
| 1504 | * the hardware used if this flag is set? |
| 1505 | */ |
| 1506 | if ((status->flag & RX_FLAG_DECRYPTED) && |
| 1507 | (status->flag & RX_FLAG_IV_STRIPPED)) |
| 1508 | return RX_CONTINUE; |
| 1509 | |
| 1510 | hdrlen = ieee80211_hdrlen(fc); |
| 1511 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame^] | 1512 | if (cs) { |
| 1513 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1514 | |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame^] | 1515 | if (unlikely(keyidx < 0)) |
| 1516 | return RX_DROP_UNUSABLE; |
| 1517 | } else { |
| 1518 | if (rx->skb->len < 8 + hdrlen) |
| 1519 | return RX_DROP_UNUSABLE; /* TODO: count this? */ |
| 1520 | /* |
| 1521 | * no need to call ieee80211_wep_get_keyidx, |
| 1522 | * it verifies a bunch of things we've done already |
| 1523 | */ |
| 1524 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); |
| 1525 | keyidx = keyid >> 6; |
| 1526 | } |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1527 | |
| 1528 | /* check per-station GTK first, if multicast packet */ |
| 1529 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) |
| 1530 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); |
| 1531 | |
| 1532 | /* if not found, try default key */ |
| 1533 | if (!rx->key) { |
| 1534 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); |
| 1535 | |
| 1536 | /* |
| 1537 | * RSNA-protected unicast frames should always be |
| 1538 | * sent with pairwise or station-to-station keys, |
| 1539 | * but for WEP we allow using a key index as well. |
| 1540 | */ |
| 1541 | if (rx->key && |
| 1542 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && |
| 1543 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && |
| 1544 | !is_multicast_ether_addr(hdr->addr1)) |
| 1545 | rx->key = NULL; |
| 1546 | } |
| 1547 | } |
| 1548 | |
| 1549 | if (rx->key) { |
| 1550 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) |
| 1551 | return RX_DROP_MONITOR; |
| 1552 | |
| 1553 | rx->key->tx_rx_count++; |
| 1554 | /* TODO: add threshold stuff again */ |
| 1555 | } else { |
| 1556 | return RX_DROP_MONITOR; |
| 1557 | } |
| 1558 | |
| 1559 | switch (rx->key->conf.cipher) { |
| 1560 | case WLAN_CIPHER_SUITE_WEP40: |
| 1561 | case WLAN_CIPHER_SUITE_WEP104: |
| 1562 | result = ieee80211_crypto_wep_decrypt(rx); |
| 1563 | break; |
| 1564 | case WLAN_CIPHER_SUITE_TKIP: |
| 1565 | result = ieee80211_crypto_tkip_decrypt(rx); |
| 1566 | break; |
| 1567 | case WLAN_CIPHER_SUITE_CCMP: |
| 1568 | result = ieee80211_crypto_ccmp_decrypt(rx); |
| 1569 | break; |
| 1570 | case WLAN_CIPHER_SUITE_AES_CMAC: |
| 1571 | result = ieee80211_crypto_aes_cmac_decrypt(rx); |
| 1572 | break; |
| 1573 | default: |
Max Stepanov | 2475b1cc | 2013-03-24 14:23:27 +0200 | [diff] [blame^] | 1574 | result = ieee80211_crypto_hw_decrypt(rx); |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 1575 | } |
| 1576 | |
| 1577 | /* the hdr variable is invalid after the decrypt handlers */ |
| 1578 | |
| 1579 | /* either the frame has been decrypted or will be dropped */ |
| 1580 | status->flag |= RX_FLAG_DECRYPTED; |
| 1581 | |
| 1582 | return result; |
| 1583 | } |
| 1584 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1585 | static inline struct ieee80211_fragment_entry * |
| 1586 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, |
| 1587 | unsigned int frag, unsigned int seq, int rx_queue, |
| 1588 | struct sk_buff **skb) |
| 1589 | { |
| 1590 | struct ieee80211_fragment_entry *entry; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1591 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1592 | entry = &sdata->fragments[sdata->fragment_next++]; |
| 1593 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) |
| 1594 | sdata->fragment_next = 0; |
| 1595 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1596 | if (!skb_queue_empty(&entry->skb_list)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1597 | __skb_queue_purge(&entry->skb_list); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1598 | |
| 1599 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ |
| 1600 | *skb = NULL; |
| 1601 | entry->first_frag_time = jiffies; |
| 1602 | entry->seq = seq; |
| 1603 | entry->rx_queue = rx_queue; |
| 1604 | entry->last_frag = frag; |
| 1605 | entry->ccmp = 0; |
| 1606 | entry->extra_len = 0; |
| 1607 | |
| 1608 | return entry; |
| 1609 | } |
| 1610 | |
| 1611 | static inline struct ieee80211_fragment_entry * |
| 1612 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1613 | unsigned int frag, unsigned int seq, |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1614 | int rx_queue, struct ieee80211_hdr *hdr) |
| 1615 | { |
| 1616 | struct ieee80211_fragment_entry *entry; |
| 1617 | int i, idx; |
| 1618 | |
| 1619 | idx = sdata->fragment_next; |
| 1620 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { |
| 1621 | struct ieee80211_hdr *f_hdr; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1622 | |
| 1623 | idx--; |
| 1624 | if (idx < 0) |
| 1625 | idx = IEEE80211_FRAGMENT_MAX - 1; |
| 1626 | |
| 1627 | entry = &sdata->fragments[idx]; |
| 1628 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || |
| 1629 | entry->rx_queue != rx_queue || |
| 1630 | entry->last_frag + 1 != frag) |
| 1631 | continue; |
| 1632 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1633 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1634 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1635 | /* |
| 1636 | * Check ftype and addresses are equal, else check next fragment |
| 1637 | */ |
| 1638 | if (((hdr->frame_control ^ f_hdr->frame_control) & |
| 1639 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1640 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
| 1641 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1642 | continue; |
| 1643 | |
S.Çağlar Onur | ab46623 | 2008-02-14 17:36:47 +0200 | [diff] [blame] | 1644 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1645 | __skb_queue_purge(&entry->skb_list); |
| 1646 | continue; |
| 1647 | } |
| 1648 | return entry; |
| 1649 | } |
| 1650 | |
| 1651 | return NULL; |
| 1652 | } |
| 1653 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 1654 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1655 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1656 | { |
| 1657 | struct ieee80211_hdr *hdr; |
| 1658 | u16 sc; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1659 | __le16 fc; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1660 | unsigned int frag, seq; |
| 1661 | struct ieee80211_fragment_entry *entry; |
| 1662 | struct sk_buff *skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1663 | struct ieee80211_rx_status *status; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1664 | |
Harvey Harrison | b73d70a | 2008-07-15 18:44:12 -0700 | [diff] [blame] | 1665 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1666 | fc = hdr->frame_control; |
Javier Cardona | f7fbf70 | 2012-10-25 11:10:18 -0700 | [diff] [blame] | 1667 | |
| 1668 | if (ieee80211_is_ctl(fc)) |
| 1669 | return RX_CONTINUE; |
| 1670 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1671 | sc = le16_to_cpu(hdr->seq_ctrl); |
| 1672 | frag = sc & IEEE80211_SCTL_FRAG; |
| 1673 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1674 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1675 | is_multicast_ether_addr(hdr->addr1))) { |
| 1676 | /* not fragmented */ |
| 1677 | goto out; |
| 1678 | } |
| 1679 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); |
| 1680 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 1681 | if (skb_linearize(rx->skb)) |
| 1682 | return RX_DROP_UNUSABLE; |
| 1683 | |
Abhijeet Kolekar | 058897a | 2010-05-11 11:22:11 -0700 | [diff] [blame] | 1684 | /* |
| 1685 | * skb_linearize() might change the skb->data and |
| 1686 | * previously cached variables (in this case, hdr) need to |
| 1687 | * be refreshed with the new data. |
| 1688 | */ |
| 1689 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1690 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
| 1691 | |
| 1692 | if (frag == 0) { |
| 1693 | /* This is the first fragment of a new frame. */ |
| 1694 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1695 | rx->seqno_idx, &(rx->skb)); |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1696 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1697 | ieee80211_has_protected(fc)) { |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1698 | int queue = rx->security_idx; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1699 | /* Store CCMP PN so that we can verify that the next |
| 1700 | * fragment has a sequential PN value. */ |
| 1701 | entry->ccmp = 1; |
| 1702 | memcpy(entry->last_pn, |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1703 | rx->key->u.ccmp.rx_pn[queue], |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1704 | IEEE80211_CCMP_PN_LEN); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1705 | } |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1706 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1707 | } |
| 1708 | |
| 1709 | /* This is a fragment for a frame that should already be pending in |
| 1710 | * fragment cache. Add this fragment to the end of the pending entry. |
| 1711 | */ |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1712 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
| 1713 | rx->seqno_idx, hdr); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1714 | if (!entry) { |
| 1715 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1716 | return RX_DROP_MONITOR; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1717 | } |
| 1718 | |
| 1719 | /* Verify that MPDUs within one MSDU have sequential PN values. |
| 1720 | * (IEEE 802.11i, 8.3.3.4.5) */ |
| 1721 | if (entry->ccmp) { |
| 1722 | int i; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1723 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1724 | int queue; |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 1725 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1726 | return RX_DROP_UNUSABLE; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1727 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
| 1728 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1729 | pn[i]++; |
| 1730 | if (pn[i]) |
| 1731 | break; |
| 1732 | } |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 1733 | queue = rx->security_idx; |
Jouni Malinen | 9190252 | 2010-06-11 10:27:33 -0700 | [diff] [blame] | 1734 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1735 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1736 | return RX_DROP_UNUSABLE; |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 1737 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1738 | } |
| 1739 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1740 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1741 | __skb_queue_tail(&entry->skb_list, rx->skb); |
| 1742 | entry->last_frag = frag; |
| 1743 | entry->extra_len += rx->skb->len; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1744 | if (ieee80211_has_morefrags(fc)) { |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1745 | rx->skb = NULL; |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1746 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1747 | } |
| 1748 | |
| 1749 | rx->skb = __skb_dequeue(&entry->skb_list); |
| 1750 | if (skb_tailroom(rx->skb) < entry->extra_len) { |
| 1751 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); |
| 1752 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, |
| 1753 | GFP_ATOMIC))) { |
| 1754 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); |
| 1755 | __skb_queue_purge(&entry->skb_list); |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 1756 | return RX_DROP_UNUSABLE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1757 | } |
| 1758 | } |
| 1759 | while ((skb = __skb_dequeue(&entry->skb_list))) { |
| 1760 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); |
| 1761 | dev_kfree_skb(skb); |
| 1762 | } |
| 1763 | |
| 1764 | /* Complete frame has been reassembled - process it now */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1765 | status = IEEE80211_SKB_RXCB(rx->skb); |
| 1766 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1767 | |
| 1768 | out: |
| 1769 | if (rx->sta) |
| 1770 | rx->sta->rx_packets++; |
| 1771 | if (is_multicast_ether_addr(hdr->addr1)) |
| 1772 | rx->local->dot11MulticastReceivedFrameCount++; |
| 1773 | else |
| 1774 | ieee80211_led_rx(rx->local); |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 1775 | return RX_CONTINUE; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1776 | } |
| 1777 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1778 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1779 | { |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1780 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1781 | return -EACCES; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1782 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1783 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1784 | } |
| 1785 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1786 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1787 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1788 | struct sk_buff *skb = rx->skb; |
| 1789 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 1790 | |
Johannes Berg | 3017b80 | 2007-08-28 17:01:53 -0400 | [diff] [blame] | 1791 | /* |
Johannes Berg | 7848ba7 | 2007-09-14 11:10:25 -0400 | [diff] [blame] | 1792 | * Pass through unencrypted frames if the hardware has |
| 1793 | * decrypted them already. |
Johannes Berg | 3017b80 | 2007-08-28 17:01:53 -0400 | [diff] [blame] | 1794 | */ |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1795 | if (status->flag & RX_FLAG_DECRYPTED) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1796 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1797 | |
| 1798 | /* Drop unencrypted frames if key is set. */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1799 | if (unlikely(!ieee80211_has_protected(fc) && |
| 1800 | !ieee80211_is_nullfunc(fc) && |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1801 | ieee80211_is_data(fc) && |
Jouni Malinen | 3cfcf6ac | 2009-01-08 13:32:02 +0200 | [diff] [blame] | 1802 | (rx->key || rx->sdata->drop_unencrypted))) |
| 1803 | return -EACCES; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1804 | |
| 1805 | return 0; |
| 1806 | } |
| 1807 | |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 1808 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1809 | { |
| 1810 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Jouni Malinen | e3efca0 | 2010-03-28 22:31:15 -0700 | [diff] [blame] | 1811 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1812 | __le16 fc = hdr->frame_control; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1813 | |
Jouni Malinen | e3efca0 | 2010-03-28 22:31:15 -0700 | [diff] [blame] | 1814 | /* |
| 1815 | * Pass through unencrypted frames if the hardware has |
| 1816 | * decrypted them already. |
| 1817 | */ |
| 1818 | if (status->flag & RX_FLAG_DECRYPTED) |
| 1819 | return 0; |
Johannes Berg | bef5d1c | 2010-02-16 11:05:00 +0100 | [diff] [blame] | 1820 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 1821 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
Jouni Malinen | d211e90 | 2010-03-28 22:29:52 -0700 | [diff] [blame] | 1822 | if (unlikely(!ieee80211_has_protected(fc) && |
| 1823 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1824 | rx->key)) { |
Johannes Berg | 6ff57cf | 2013-05-16 00:55:00 +0200 | [diff] [blame] | 1825 | if (ieee80211_is_deauth(fc) || |
| 1826 | ieee80211_is_disassoc(fc)) |
| 1827 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, |
| 1828 | rx->skb->data, |
| 1829 | rx->skb->len); |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1830 | return -EACCES; |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1831 | } |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1832 | /* BIP does not use Protected field, so need to check MMIE */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1833 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1834 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
Johannes Berg | 6ff57cf | 2013-05-16 00:55:00 +0200 | [diff] [blame] | 1835 | if (ieee80211_is_deauth(fc) || |
| 1836 | ieee80211_is_disassoc(fc)) |
| 1837 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, |
| 1838 | rx->skb->data, |
| 1839 | rx->skb->len); |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1840 | return -EACCES; |
Jouni Malinen | cf4e594 | 2010-12-16 00:52:40 +0200 | [diff] [blame] | 1841 | } |
Jouni Malinen | f2ca3ea | 2009-05-08 12:36:03 +0300 | [diff] [blame] | 1842 | /* |
| 1843 | * When using MFP, Action frames are not allowed prior to |
| 1844 | * having configured keys. |
| 1845 | */ |
| 1846 | if (unlikely(ieee80211_is_action(fc) && !rx->key && |
| 1847 | ieee80211_is_robust_mgmt_frame( |
| 1848 | (struct ieee80211_hdr *) rx->skb->data))) |
| 1849 | return -EACCES; |
| 1850 | } |
Johannes Berg | b3fc9c6 | 2008-04-13 10:12:47 +0200 | [diff] [blame] | 1851 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1852 | return 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1853 | } |
| 1854 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1855 | static int |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1856 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1857 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1858 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1859 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1860 | bool check_port_control = false; |
| 1861 | struct ethhdr *ehdr; |
| 1862 | int ret; |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1863 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1864 | *port_control = false; |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1865 | if (ieee80211_has_a4(hdr->frame_control) && |
| 1866 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1867 | return -1; |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1868 | |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1869 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
| 1870 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { |
| 1871 | |
| 1872 | if (!sdata->u.mgd.use_4addr) |
| 1873 | return -1; |
| 1874 | else |
| 1875 | check_port_control = true; |
| 1876 | } |
| 1877 | |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1878 | if (is_multicast_ether_addr(hdr->addr1) && |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1879 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 1880 | return -1; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1881 | |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1882 | 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] | 1883 | if (ret < 0) |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1884 | return ret; |
| 1885 | |
| 1886 | ehdr = (struct ethhdr *) rx->skb->data; |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 1887 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
| 1888 | *port_control = true; |
| 1889 | else if (check_port_control) |
Felix Fietkau | fbb327c | 2011-01-18 15:48:48 +0100 | [diff] [blame] | 1890 | return -1; |
| 1891 | |
| 1892 | return 0; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1893 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1894 | |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1895 | /* |
| 1896 | * requires that rx->skb is a frame with ethernet header |
| 1897 | */ |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1898 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1899 | { |
Senthil Balasubramanian | c97c23e | 2008-05-28 23:15:32 +0530 | [diff] [blame] | 1900 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1901 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
| 1902 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
| 1903 | |
| 1904 | /* |
| 1905 | * Allow EAPOL frames to us/the PAE group address regardless |
| 1906 | * of whether the frame was encrypted or not. |
| 1907 | */ |
Johannes Berg | a621fa4 | 2010-08-27 14:26:54 +0300 | [diff] [blame] | 1908 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
Joe Perches | 3bc7945 | 2012-05-08 18:56:53 +0000 | [diff] [blame] | 1909 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
| 1910 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1911 | return true; |
| 1912 | |
| 1913 | if (ieee80211_802_1x_port_control(rx) || |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 1914 | ieee80211_drop_unencrypted(rx, fc)) |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1915 | return false; |
| 1916 | |
| 1917 | return true; |
| 1918 | } |
| 1919 | |
| 1920 | /* |
| 1921 | * requires that rx->skb is a frame with ethernet header |
| 1922 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1923 | static void |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 1924 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1925 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 1926 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 1927 | struct net_device *dev = sdata->dev; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1928 | struct sk_buff *skb, *xmit_skb; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1929 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
| 1930 | struct sta_info *dsta; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1931 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1932 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1933 | skb = rx->skb; |
| 1934 | xmit_skb = NULL; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1935 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 1936 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
| 1937 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
Johannes Berg | 213cd11 | 2008-09-11 00:01:54 +0200 | [diff] [blame] | 1938 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 1939 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 1940 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1941 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
| 1942 | /* |
| 1943 | * send multicast frames both to higher layers in |
| 1944 | * local net stack and back to the wireless medium |
| 1945 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1946 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1947 | if (!xmit_skb) |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1948 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1949 | dev->name); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1950 | } else { |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 1951 | dsta = sta_info_get(sdata, skb->data); |
| 1952 | if (dsta) { |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 1953 | /* |
| 1954 | * The destination station is associated to |
| 1955 | * this AP (in this VLAN), so send the frame |
| 1956 | * directly to it and do not pass it to local |
| 1957 | * net stack. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1958 | */ |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 1959 | xmit_skb = skb; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1960 | skb = NULL; |
| 1961 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1962 | } |
| 1963 | } |
| 1964 | |
| 1965 | if (skb) { |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1966 | int align __maybe_unused; |
| 1967 | |
Kalle Valo | 59d9cb0 | 2009-12-17 13:54:57 +0100 | [diff] [blame] | 1968 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1969 | /* |
| 1970 | * 'align' will only take the values 0 or 2 here |
| 1971 | * since all frames are required to be aligned |
| 1972 | * to 2-byte boundaries when being passed to |
Johannes Berg | 191922c | 2013-02-20 21:44:12 +0100 | [diff] [blame] | 1973 | * mac80211; the code here works just as well if |
| 1974 | * that isn't true, but mac80211 assumes it can |
| 1975 | * access fields as 2-byte aligned (e.g. for |
| 1976 | * compare_ether_addr) |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1977 | */ |
matthieu castet | dacb6f1 | 2009-06-04 22:16:18 +0200 | [diff] [blame] | 1978 | align = ((unsigned long)(skb->data + sizeof(struct ethhdr))) & 3; |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1979 | if (align) { |
| 1980 | if (WARN_ON(skb_headroom(skb) < 3)) { |
| 1981 | dev_kfree_skb(skb); |
| 1982 | skb = NULL; |
| 1983 | } else { |
| 1984 | u8 *data = skb->data; |
Zhu Yi | 8ce0b58 | 2009-10-28 13:13:52 -0700 | [diff] [blame] | 1985 | size_t len = skb_headlen(skb); |
| 1986 | skb->data -= align; |
| 1987 | memmove(skb->data, data, len); |
| 1988 | skb_set_tail_pointer(skb, len); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1989 | } |
| 1990 | } |
| 1991 | #endif |
| 1992 | |
| 1993 | if (skb) { |
| 1994 | /* deliver to local stack */ |
| 1995 | skb->protocol = eth_type_trans(skb, dev); |
| 1996 | memset(skb->cb, 0, sizeof(skb->cb)); |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 1997 | netif_receive_skb(skb); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 1998 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 1999 | } |
| 2000 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2001 | if (xmit_skb) { |
Helmut Schaa | aef6c92 | 2011-12-21 09:11:35 +0100 | [diff] [blame] | 2002 | /* |
| 2003 | * Send to wireless media and increase priority by 256 to |
| 2004 | * keep the received priority instead of reclassifying |
| 2005 | * the frame (see cfg80211_classify8021d). |
| 2006 | */ |
| 2007 | xmit_skb->priority += 256; |
YOSHIFUJI Hideaki | f831e90 | 2007-12-12 03:54:23 +0900 | [diff] [blame] | 2008 | xmit_skb->protocol = htons(ETH_P_802_3); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2009 | skb_reset_network_header(xmit_skb); |
| 2010 | skb_reset_mac_header(xmit_skb); |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2011 | dev_queue_xmit(xmit_skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2012 | } |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2013 | } |
| 2014 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2015 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2016 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2017 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2018 | struct net_device *dev = rx->sdata->dev; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2019 | struct sk_buff *skb = rx->skb; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2020 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 2021 | __le16 fc = hdr->frame_control; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2022 | struct sk_buff_head frame_list; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2023 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2024 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2025 | if (unlikely(!ieee80211_is_data(fc))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2026 | return RX_CONTINUE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2027 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2028 | if (unlikely(!ieee80211_is_data_present(fc))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2029 | return RX_DROP_MONITOR; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2030 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2031 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2032 | return RX_CONTINUE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2033 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2034 | if (ieee80211_has_a4(hdr->frame_control) && |
| 2035 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2036 | !rx->sdata->u.vlan.sta) |
| 2037 | return RX_DROP_UNUSABLE; |
| 2038 | |
| 2039 | if (is_multicast_ether_addr(hdr->addr1) && |
| 2040 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2041 | rx->sdata->u.vlan.sta) || |
| 2042 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && |
| 2043 | rx->sdata->u.mgd.use_4addr))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2044 | return RX_DROP_UNUSABLE; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2045 | |
| 2046 | skb->dev = dev; |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2047 | __skb_queue_head_init(&frame_list); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2048 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 2049 | if (skb_linearize(skb)) |
| 2050 | return RX_DROP_UNUSABLE; |
| 2051 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2052 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
| 2053 | rx->sdata->vif.type, |
Yogesh Ashok Powar | 8b3beca | 2011-05-13 11:22:31 -0700 | [diff] [blame] | 2054 | rx->local->hw.extra_tx_headroom, true); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2055 | |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2056 | while (!skb_queue_empty(&frame_list)) { |
| 2057 | rx->skb = __skb_dequeue(&frame_list); |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2058 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2059 | if (!ieee80211_frame_allowed(rx, fc)) { |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2060 | dev_kfree_skb(rx->skb); |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2061 | continue; |
| 2062 | } |
Zhu Yi | eaf85ca | 2009-12-01 10:18:37 +0800 | [diff] [blame] | 2063 | dev->stats.rx_packets++; |
| 2064 | dev->stats.rx_bytes += rx->skb->len; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2065 | |
| 2066 | ieee80211_deliver_skb(rx); |
| 2067 | } |
| 2068 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2069 | return RX_QUEUED; |
Ron Rindjunsky | fd4c7f2 | 2007-11-26 16:14:33 +0200 | [diff] [blame] | 2070 | } |
| 2071 | |
Ingo Molnar | bf94e17 | 2008-10-12 23:51:38 -0700 | [diff] [blame] | 2072 | #ifdef CONFIG_MAC80211_MESH |
Davide Pesavento | b0dee57 | 2008-09-27 17:29:12 +0200 | [diff] [blame] | 2073 | static ieee80211_rx_result |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2074 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
| 2075 | { |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2076 | struct ieee80211_hdr *fwd_hdr, *hdr; |
| 2077 | struct ieee80211_tx_info *info; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2078 | struct ieee80211s_hdr *mesh_hdr; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2079 | struct sk_buff *skb = rx->skb, *fwd_skb; |
Johannes Berg | 3b8d81e0 | 2009-06-17 17:43:56 +0200 | [diff] [blame] | 2080 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2081 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2082 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2083 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
Thomas Pedersen | 0cfda85 | 2011-11-24 17:15:25 -0800 | [diff] [blame] | 2084 | __le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2085 | u16 q, hdrlen; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2086 | |
| 2087 | hdr = (struct ieee80211_hdr *) skb->data; |
| 2088 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2089 | |
| 2090 | /* make sure fixed part of mesh header is there, also checks skb len */ |
| 2091 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) |
| 2092 | return RX_DROP_MONITOR; |
| 2093 | |
| 2094 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| 2095 | |
| 2096 | /* make sure full mesh header is there, also checks skb len */ |
| 2097 | if (!pskb_may_pull(rx->skb, |
| 2098 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) |
| 2099 | return RX_DROP_MONITOR; |
| 2100 | |
| 2101 | /* reload pointers */ |
| 2102 | hdr = (struct ieee80211_hdr *) skb->data; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2103 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| 2104 | |
Thomas Pedersen | 2157fdd | 2011-09-01 12:32:14 -0700 | [diff] [blame] | 2105 | /* frame is in RMC, don't forward */ |
| 2106 | if (ieee80211_is_data(hdr->frame_control) && |
| 2107 | is_multicast_ether_addr(hdr->addr1) && |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2108 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
Thomas Pedersen | 2157fdd | 2011-09-01 12:32:14 -0700 | [diff] [blame] | 2109 | return RX_DROP_MONITOR; |
| 2110 | |
Javier Cardona | 555cb71 | 2012-10-24 12:43:30 -0700 | [diff] [blame] | 2111 | if (!ieee80211_is_data(hdr->frame_control) || |
| 2112 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2113 | return RX_CONTINUE; |
| 2114 | |
| 2115 | if (!mesh_hdr->ttl) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2116 | return RX_DROP_MONITOR; |
| 2117 | |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2118 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2119 | struct mesh_path *mppath; |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2120 | char *proxied_addr; |
| 2121 | char *mpp_addr; |
| 2122 | |
| 2123 | if (is_multicast_ether_addr(hdr->addr1)) { |
| 2124 | mpp_addr = hdr->addr3; |
| 2125 | proxied_addr = mesh_hdr->eaddr1; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2126 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
| 2127 | /* has_a4 already checked in ieee80211_rx_mesh_check */ |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2128 | mpp_addr = hdr->addr4; |
| 2129 | proxied_addr = mesh_hdr->eaddr2; |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2130 | } else { |
| 2131 | return RX_DROP_MONITOR; |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2132 | } |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2133 | |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2134 | rcu_read_lock(); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2135 | mppath = mpp_path_lookup(sdata, proxied_addr); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2136 | if (!mppath) { |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2137 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2138 | } else { |
| 2139 | spin_lock_bh(&mppath->state_lock); |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2140 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
Javier Cardona | 43b7b31 | 2009-10-15 18:10:51 -0700 | [diff] [blame] | 2141 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
YanBo | 79617de | 2008-09-22 13:30:32 +0800 | [diff] [blame] | 2142 | spin_unlock_bh(&mppath->state_lock); |
| 2143 | } |
| 2144 | rcu_read_unlock(); |
| 2145 | } |
| 2146 | |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2147 | /* Frame has reached destination. Don't forward */ |
| 2148 | if (!is_multicast_ether_addr(hdr->addr1) && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2149 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2150 | return RX_CONTINUE; |
| 2151 | |
Yoni Divinsky | 00e96de | 2012-06-20 15:39:13 +0300 | [diff] [blame] | 2152 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
Thomas Pedersen | d3c1597 | 2011-11-24 17:15:23 -0800 | [diff] [blame] | 2153 | if (ieee80211_queue_stopped(&local->hw, q)) { |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2154 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
Thomas Pedersen | d3c1597 | 2011-11-24 17:15:23 -0800 | [diff] [blame] | 2155 | return RX_DROP_MONITOR; |
| 2156 | } |
| 2157 | skb_set_queue_mapping(skb, q); |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2158 | |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2159 | if (!--mesh_hdr->ttl) { |
| 2160 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); |
Javier Cardona | 2ac64cd | 2012-10-24 12:43:31 -0700 | [diff] [blame] | 2161 | goto out; |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2162 | } |
| 2163 | |
Chun-Yeow Yeoh | d665508 | 2012-03-02 02:03:19 +0800 | [diff] [blame] | 2164 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
| 2165 | goto out; |
| 2166 | |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2167 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
| 2168 | if (!fwd_skb) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 2169 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 2170 | sdata->name); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2171 | goto out; |
| 2172 | } |
| 2173 | |
| 2174 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; |
Thomas Pedersen | 9d6d6f4 | 2013-04-08 11:06:12 -0700 | [diff] [blame] | 2175 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2176 | info = IEEE80211_SKB_CB(fwd_skb); |
| 2177 | memset(info, 0, sizeof(*info)); |
| 2178 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
| 2179 | info->control.vif = &rx->sdata->vif; |
| 2180 | info->control.jiffies = jiffies; |
| 2181 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { |
| 2182 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); |
| 2183 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2184 | /* update power mode indication when forwarding */ |
| 2185 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2186 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 2187 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2188 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
| 2189 | } else { |
| 2190 | /* unable to resolve next hop */ |
Johannes Berg | bf7cd94 | 2013-02-15 14:40:31 +0100 | [diff] [blame] | 2191 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
| 2192 | fwd_hdr->addr3, 0, reason, fwd_hdr->addr2); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2193 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
Jesper Juhl | 74b8cc3 | 2012-01-14 21:52:17 +0100 | [diff] [blame] | 2194 | kfree_skb(fwd_skb); |
Thomas Pedersen | 30789eb | 2011-11-24 17:15:26 -0800 | [diff] [blame] | 2195 | return RX_DROP_MONITOR; |
| 2196 | } |
| 2197 | |
| 2198 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
| 2199 | ieee80211_add_pending_skb(local, fwd_skb); |
Johannes Berg | b51aff0 | 2010-12-22 10:15:07 +0100 | [diff] [blame] | 2200 | out: |
Javier Cardona | 3c5772a | 2009-08-10 12:15:48 -0700 | [diff] [blame] | 2201 | if (is_multicast_ether_addr(hdr->addr1) || |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2202 | sdata->dev->flags & IFF_PROMISC) |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2203 | return RX_CONTINUE; |
| 2204 | else |
| 2205 | return RX_DROP_MONITOR; |
| 2206 | } |
Ingo Molnar | bf94e17 | 2008-10-12 23:51:38 -0700 | [diff] [blame] | 2207 | #endif |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 2208 | |
| 2209 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2210 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2211 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2212 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Vivek Natarajan | e15276a | 2010-02-08 17:47:01 +0530 | [diff] [blame] | 2213 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2214 | struct net_device *dev = sdata->dev; |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2215 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
| 2216 | __le16 fc = hdr->frame_control; |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2217 | bool port_control; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2218 | int err; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2219 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2220 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2221 | return RX_CONTINUE; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2222 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2223 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2224 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2225 | |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2226 | /* |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2227 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
| 2228 | * also drop the frame to cooked monitor interfaces. |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2229 | */ |
| 2230 | if (ieee80211_has_a4(hdr->frame_control) && |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2231 | sdata->vif.type == NL80211_IFTYPE_AP) { |
| 2232 | if (rx->sta && |
| 2233 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) |
| 2234 | cfg80211_rx_unexpected_4addr_frame( |
| 2235 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2236 | return RX_DROP_MONITOR; |
Johannes Berg | e7f4a94 | 2011-11-04 11:18:20 +0100 | [diff] [blame] | 2237 | } |
Felix Fietkau | f14543ee | 2009-11-10 20:10:05 +0100 | [diff] [blame] | 2238 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2239 | err = __ieee80211_data_to_8023(rx, &port_control); |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2240 | if (unlikely(err)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2241 | return RX_DROP_UNUSABLE; |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2242 | |
Harvey Harrison | 358c8d9 | 2008-07-15 18:44:13 -0700 | [diff] [blame] | 2243 | if (!ieee80211_frame_allowed(rx, fc)) |
Johannes Berg | e4c26ad | 2008-01-31 19:48:21 +0100 | [diff] [blame] | 2244 | return RX_DROP_MONITOR; |
Johannes Berg | ce3edf6d0 | 2007-12-19 01:31:22 +0100 | [diff] [blame] | 2245 | |
Felix Fietkau | 4114fa2 | 2011-04-12 19:15:22 +0200 | [diff] [blame] | 2246 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
| 2247 | unlikely(port_control) && sdata->bss) { |
| 2248 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
| 2249 | u.ap); |
| 2250 | dev = sdata->dev; |
| 2251 | rx->sdata = sdata; |
| 2252 | } |
| 2253 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2254 | rx->skb->dev = dev; |
| 2255 | |
| 2256 | dev->stats.rx_packets++; |
| 2257 | dev->stats.rx_bytes += rx->skb->len; |
| 2258 | |
Helmut Schaa | 08ca944 | 2010-11-30 12:19:34 +0100 | [diff] [blame] | 2259 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
Rajkumar Manoharan | 8c99f69 | 2011-02-02 22:57:53 +0530 | [diff] [blame] | 2260 | !is_multicast_ether_addr( |
| 2261 | ((struct ethhdr *)rx->skb->data)->h_dest) && |
| 2262 | (!local->scanning && |
| 2263 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { |
Vivek Natarajan | e15276a | 2010-02-08 17:47:01 +0530 | [diff] [blame] | 2264 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 2265 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); |
| 2266 | } |
| 2267 | |
Ron Rindjunsky | 76ee65b | 2007-11-22 19:49:12 +0200 | [diff] [blame] | 2268 | ieee80211_deliver_skb(rx); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2269 | |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2270 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2271 | } |
| 2272 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2273 | static ieee80211_rx_result debug_noinline |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2274 | 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] | 2275 | { |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2276 | struct sk_buff *skb = rx->skb; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2277 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2278 | struct tid_ampdu_rx *tid_agg_rx; |
| 2279 | u16 start_seq_num; |
| 2280 | u16 tid; |
| 2281 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2282 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
Johannes Berg | 9ae54c8 | 2008-01-31 19:48:20 +0100 | [diff] [blame] | 2283 | return RX_CONTINUE; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2284 | |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 2285 | if (ieee80211_is_back_req(bar->frame_control)) { |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2286 | struct { |
| 2287 | __le16 control, start_seq_num; |
| 2288 | } __packed bar_data; |
| 2289 | |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2290 | if (!rx->sta) |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2291 | return RX_DROP_MONITOR; |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2292 | |
| 2293 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), |
| 2294 | &bar_data, sizeof(bar_data))) |
| 2295 | return RX_DROP_MONITOR; |
| 2296 | |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2297 | tid = le16_to_cpu(bar_data.control) >> 12; |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 2298 | |
| 2299 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); |
| 2300 | if (!tid_agg_rx) |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2301 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2302 | |
Johannes Berg | 8ae5977 | 2010-05-30 14:52:58 +0200 | [diff] [blame] | 2303 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2304 | |
| 2305 | /* reset session timer */ |
Johannes Berg | 20ad19d | 2009-02-10 21:25:45 +0100 | [diff] [blame] | 2306 | if (tid_agg_rx->timeout) |
| 2307 | mod_timer(&tid_agg_rx->session_timer, |
| 2308 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2309 | |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 2310 | spin_lock(&tid_agg_rx->reorder_lock); |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2311 | /* release stored frames up to start of BAR */ |
Johannes Berg | d3b2fb5 | 2012-06-22 12:48:38 +0200 | [diff] [blame] | 2312 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2313 | start_seq_num, frames); |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 2314 | spin_unlock(&tid_agg_rx->reorder_lock); |
| 2315 | |
Johannes Berg | a02ae75 | 2009-11-16 12:00:40 +0100 | [diff] [blame] | 2316 | kfree_skb(skb); |
| 2317 | return RX_QUEUED; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2318 | } |
| 2319 | |
Johannes Berg | 08daeca | 2010-05-30 14:53:43 +0200 | [diff] [blame] | 2320 | /* |
| 2321 | * After this point, we only want management frames, |
| 2322 | * so we can drop all remaining control frames to |
| 2323 | * cooked monitor interfaces. |
| 2324 | */ |
| 2325 | return RX_DROP_MONITOR; |
Ron Rindjunsky | 7136471 | 2007-12-25 17:00:36 +0200 | [diff] [blame] | 2326 | } |
| 2327 | |
Jouni Malinen | f4f727a | 2009-01-10 11:46:53 +0200 | [diff] [blame] | 2328 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
| 2329 | struct ieee80211_mgmt *mgmt, |
| 2330 | size_t len) |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2331 | { |
| 2332 | struct ieee80211_local *local = sdata->local; |
| 2333 | struct sk_buff *skb; |
| 2334 | struct ieee80211_mgmt *resp; |
| 2335 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2336 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2337 | /* Not to own unicast address */ |
| 2338 | return; |
| 2339 | } |
| 2340 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 2341 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
| 2342 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 2343 | /* Not from the current AP or not associated yet. */ |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2344 | return; |
| 2345 | } |
| 2346 | |
| 2347 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { |
| 2348 | /* Too short SA Query request frame */ |
| 2349 | return; |
| 2350 | } |
| 2351 | |
| 2352 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); |
| 2353 | if (skb == NULL) |
| 2354 | return; |
| 2355 | |
| 2356 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 2357 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 2358 | memset(resp, 0, 24); |
| 2359 | memcpy(resp->da, mgmt->sa, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 2360 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2361 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2362 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 2363 | IEEE80211_STYPE_ACTION); |
| 2364 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); |
| 2365 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; |
| 2366 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; |
| 2367 | memcpy(resp->u.action.u.sa_query.trans_id, |
| 2368 | mgmt->u.action.u.sa_query.trans_id, |
| 2369 | WLAN_SA_QUERY_TR_ID_LEN); |
| 2370 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 2371 | ieee80211_tx_skb(sdata, skb); |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2372 | } |
| 2373 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 2374 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2375 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) |
| 2376 | { |
| 2377 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2378 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2379 | |
| 2380 | /* |
| 2381 | * From here on, look only at management frames. |
| 2382 | * Data and control frames are already handled, |
| 2383 | * and unknown (reserved) frames are useless. |
| 2384 | */ |
| 2385 | if (rx->skb->len < 24) |
| 2386 | return RX_DROP_MONITOR; |
| 2387 | |
| 2388 | if (!ieee80211_is_mgmt(mgmt->frame_control)) |
| 2389 | return RX_DROP_MONITOR; |
| 2390 | |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2391 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
| 2392 | ieee80211_is_beacon(mgmt->frame_control) && |
| 2393 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2394 | int sig = 0; |
| 2395 | |
| 2396 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
| 2397 | sig = status->signal; |
| 2398 | |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2399 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
| 2400 | rx->skb->data, rx->skb->len, |
Ben Greear | 37c73b5 | 2012-10-26 14:49:25 -0700 | [diff] [blame] | 2401 | status->freq, sig); |
Johannes Berg | ee97192 | 2011-11-04 11:18:18 +0100 | [diff] [blame] | 2402 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
| 2403 | } |
| 2404 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2405 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2406 | return RX_DROP_MONITOR; |
| 2407 | |
| 2408 | if (ieee80211_drop_unencrypted_mgmt(rx)) |
| 2409 | return RX_DROP_UNUSABLE; |
| 2410 | |
| 2411 | return RX_CONTINUE; |
| 2412 | } |
| 2413 | |
| 2414 | static ieee80211_rx_result debug_noinline |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2415 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) |
| 2416 | { |
| 2417 | struct ieee80211_local *local = rx->local; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2418 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2419 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2420 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2421 | int len = rx->skb->len; |
| 2422 | |
| 2423 | if (!ieee80211_is_action(mgmt->frame_control)) |
| 2424 | return RX_CONTINUE; |
| 2425 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2426 | /* drop too small frames */ |
| 2427 | if (len < IEEE80211_MIN_ACTION_SIZE) |
| 2428 | return RX_DROP_UNUSABLE; |
| 2429 | |
Marco Porsch | 815b809 | 2012-12-05 15:04:26 -0800 | [diff] [blame] | 2430 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2431 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
| 2432 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2433 | return RX_DROP_UNUSABLE; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2434 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2435 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2436 | return RX_DROP_UNUSABLE; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2437 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2438 | switch (mgmt->u.action.category) { |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2439 | case WLAN_CATEGORY_HT: |
| 2440 | /* reject HT action frames from stations not supporting HT */ |
| 2441 | if (!rx->sta->sta.ht_cap.ht_supported) |
| 2442 | goto invalid; |
| 2443 | |
| 2444 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 2445 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
| 2446 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 2447 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2448 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 2449 | break; |
| 2450 | |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2451 | /* verify action & smps_control/chanwidth are present */ |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2452 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
| 2453 | goto invalid; |
| 2454 | |
| 2455 | switch (mgmt->u.action.u.ht_smps.action) { |
| 2456 | case WLAN_HT_ACTION_SMPS: { |
| 2457 | struct ieee80211_supported_band *sband; |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2458 | enum ieee80211_smps_mode smps_mode; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2459 | |
| 2460 | /* convert to HT capability */ |
| 2461 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
| 2462 | case WLAN_HT_SMPS_CONTROL_DISABLED: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2463 | smps_mode = IEEE80211_SMPS_OFF; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2464 | break; |
| 2465 | case WLAN_HT_SMPS_CONTROL_STATIC: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2466 | smps_mode = IEEE80211_SMPS_STATIC; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2467 | break; |
| 2468 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2469 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2470 | break; |
| 2471 | default: |
| 2472 | goto invalid; |
| 2473 | } |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2474 | |
| 2475 | /* if no change do nothing */ |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2476 | if (rx->sta->sta.smps_mode == smps_mode) |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2477 | goto handled; |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 2478 | rx->sta->sta.smps_mode = smps_mode; |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2479 | |
| 2480 | sband = rx->local->hw.wiphy->bands[status->band]; |
| 2481 | |
Johannes Berg | 64f68e5 | 2012-03-28 10:58:37 +0200 | [diff] [blame] | 2482 | rate_control_rate_update(local, sband, rx->sta, |
| 2483 | IEEE80211_RC_SMPS_CHANGED); |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2484 | goto handled; |
| 2485 | } |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2486 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
| 2487 | struct ieee80211_supported_band *sband; |
| 2488 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2489 | enum ieee80211_sta_rx_bandwidth new_bw; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2490 | |
| 2491 | /* If it doesn't support 40 MHz it can't change ... */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2492 | if (!(rx->sta->sta.ht_cap.cap & |
| 2493 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2494 | goto handled; |
| 2495 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2496 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
| 2497 | new_bw = IEEE80211_STA_RX_BW_20; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2498 | else |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 2499 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); |
| 2500 | |
| 2501 | if (rx->sta->sta.bandwidth == new_bw) |
| 2502 | goto handled; |
Johannes Berg | ec61cd6 | 2012-12-28 12:12:10 +0100 | [diff] [blame] | 2503 | |
| 2504 | sband = rx->local->hw.wiphy->bands[status->band]; |
| 2505 | |
| 2506 | rate_control_rate_update(local, sband, rx->sta, |
| 2507 | IEEE80211_RC_BW_CHANGED); |
| 2508 | goto handled; |
| 2509 | } |
Johannes Berg | 1d8d3de | 2011-12-16 15:28:57 +0100 | [diff] [blame] | 2510 | default: |
| 2511 | goto invalid; |
| 2512 | } |
| 2513 | |
| 2514 | break; |
Johannes Berg | 1b3a2e4 | 2013-03-26 15:17:18 +0100 | [diff] [blame] | 2515 | case WLAN_CATEGORY_PUBLIC: |
| 2516 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2517 | goto invalid; |
| 2518 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2519 | break; |
| 2520 | if (!rx->sta) |
| 2521 | break; |
| 2522 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) |
| 2523 | break; |
| 2524 | if (mgmt->u.action.u.ext_chan_switch.action_code != |
| 2525 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) |
| 2526 | break; |
| 2527 | if (len < offsetof(struct ieee80211_mgmt, |
| 2528 | u.action.u.ext_chan_switch.variable)) |
| 2529 | goto invalid; |
| 2530 | goto queue; |
Johannes Berg | 0af83d3 | 2012-12-27 18:55:36 +0100 | [diff] [blame] | 2531 | case WLAN_CATEGORY_VHT: |
| 2532 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 2533 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
| 2534 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 2535 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2536 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 2537 | break; |
| 2538 | |
| 2539 | /* verify action code is present */ |
| 2540 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2541 | goto invalid; |
| 2542 | |
| 2543 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { |
| 2544 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { |
| 2545 | u8 opmode; |
| 2546 | |
| 2547 | /* verify opmode is present */ |
| 2548 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
| 2549 | goto invalid; |
| 2550 | |
| 2551 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; |
| 2552 | |
| 2553 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, |
Johannes Berg | bee7f58 | 2013-02-07 22:24:55 +0100 | [diff] [blame] | 2554 | opmode, status->band, |
| 2555 | false); |
Johannes Berg | 0af83d3 | 2012-12-27 18:55:36 +0100 | [diff] [blame] | 2556 | goto handled; |
| 2557 | } |
| 2558 | default: |
| 2559 | break; |
| 2560 | } |
| 2561 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2562 | case WLAN_CATEGORY_BACK: |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2563 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 2564 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2565 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 2566 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 2567 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2568 | break; |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 2569 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2570 | /* verify action_code is present */ |
| 2571 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2572 | break; |
| 2573 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2574 | switch (mgmt->u.action.u.addba_req.action_code) { |
| 2575 | case WLAN_ACTION_ADDBA_REQ: |
| 2576 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2577 | sizeof(mgmt->u.action.u.addba_req))) |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2578 | goto invalid; |
| 2579 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2580 | case WLAN_ACTION_ADDBA_RESP: |
| 2581 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2582 | sizeof(mgmt->u.action.u.addba_resp))) |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2583 | goto invalid; |
| 2584 | break; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2585 | case WLAN_ACTION_DELBA: |
| 2586 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2587 | sizeof(mgmt->u.action.u.delba))) |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2588 | goto invalid; |
| 2589 | break; |
| 2590 | default: |
| 2591 | goto invalid; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2592 | } |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2593 | |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2594 | goto queue; |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2595 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2596 | /* verify action_code is present */ |
| 2597 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 2598 | break; |
| 2599 | |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2600 | switch (mgmt->u.action.u.measurement.action_code) { |
| 2601 | case WLAN_ACTION_SPCT_MSR_REQ: |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2602 | if (status->band != IEEE80211_BAND_5GHZ) |
| 2603 | break; |
| 2604 | |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2605 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2606 | sizeof(mgmt->u.action.u.measurement))) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2607 | break; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2608 | |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 2609 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2610 | break; |
Johannes Berg | cc32abd | 2009-05-15 11:52:31 +0200 | [diff] [blame] | 2611 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2612 | ieee80211_process_measurement_req(sdata, mgmt, len); |
| 2613 | goto handled; |
| 2614 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
| 2615 | u8 *bssid; |
| 2616 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2617 | sizeof(mgmt->u.action.u.chan_switch))) |
| 2618 | break; |
| 2619 | |
| 2620 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 2621 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2622 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2623 | break; |
| 2624 | |
| 2625 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 2626 | bssid = sdata->u.mgd.bssid; |
| 2627 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 2628 | bssid = sdata->u.ibss.bssid; |
Chun-Yeow Yeoh | b8456a1 | 2013-10-17 15:55:02 -0700 | [diff] [blame] | 2629 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
| 2630 | bssid = mgmt->sa; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2631 | else |
| 2632 | break; |
| 2633 | |
| 2634 | if (!ether_addr_equal(mgmt->bssid, bssid)) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2635 | break; |
Sujith | c481ec9 | 2009-01-06 09:28:37 +0530 | [diff] [blame] | 2636 | |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2637 | goto queue; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 2638 | } |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2639 | } |
| 2640 | break; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2641 | case WLAN_CATEGORY_SA_QUERY: |
| 2642 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2643 | sizeof(mgmt->u.action.u.sa_query))) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2644 | break; |
| 2645 | |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2646 | switch (mgmt->u.action.u.sa_query.action) { |
| 2647 | case WLAN_ACTION_SA_QUERY_REQUEST: |
| 2648 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2649 | break; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2650 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2651 | goto handled; |
Jouni Malinen | fea1473 | 2009-01-08 13:32:06 +0200 | [diff] [blame] | 2652 | } |
| 2653 | break; |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2654 | case WLAN_CATEGORY_SELF_PROTECTED: |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2655 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2656 | sizeof(mgmt->u.action.u.self_prot.action_code))) |
| 2657 | break; |
| 2658 | |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2659 | switch (mgmt->u.action.u.self_prot.action_code) { |
| 2660 | case WLAN_SP_MESH_PEERING_OPEN: |
| 2661 | case WLAN_SP_MESH_PEERING_CLOSE: |
| 2662 | case WLAN_SP_MESH_PEERING_CONFIRM: |
| 2663 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2664 | goto invalid; |
Thomas Pedersen | a6dad6a | 2013-03-04 13:06:12 -0800 | [diff] [blame] | 2665 | if (sdata->u.mesh.user_mpm) |
Thomas Pedersen | 8db0985 | 2011-08-12 20:01:00 -0700 | [diff] [blame] | 2666 | /* userspace handles this frame */ |
| 2667 | break; |
| 2668 | goto queue; |
| 2669 | case WLAN_SP_MGK_INFORM: |
| 2670 | case WLAN_SP_MGK_ACK: |
| 2671 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2672 | goto invalid; |
| 2673 | break; |
| 2674 | } |
| 2675 | break; |
Javier Cardona | d3aaec8a | 2011-05-03 16:57:09 -0700 | [diff] [blame] | 2676 | case WLAN_CATEGORY_MESH_ACTION: |
Johannes Berg | 9b395bc | 2012-10-26 00:36:40 +0200 | [diff] [blame] | 2677 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
| 2678 | sizeof(mgmt->u.action.u.mesh_action.action_code))) |
| 2679 | break; |
| 2680 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2681 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
| 2682 | break; |
Thomas Pedersen | 25d49e4 | 2011-08-11 19:35:15 -0700 | [diff] [blame] | 2683 | if (mesh_action_is_path_sel(mgmt) && |
Johannes Berg | 1df332e | 2012-10-26 00:09:11 +0200 | [diff] [blame] | 2684 | !mesh_path_sel_is_hwmp(sdata)) |
Javier Cardona | c7108a7 | 2010-12-16 17:37:50 -0800 | [diff] [blame] | 2685 | break; |
| 2686 | goto queue; |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2687 | } |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2688 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2689 | return RX_CONTINUE; |
| 2690 | |
Johannes Berg | bed7ee6e | 2010-06-10 10:21:35 +0200 | [diff] [blame] | 2691 | invalid: |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2692 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2693 | /* will return in the next handlers */ |
| 2694 | return RX_CONTINUE; |
| 2695 | |
| 2696 | handled: |
| 2697 | if (rx->sta) |
| 2698 | rx->sta->rx_packets++; |
| 2699 | dev_kfree_skb(rx->skb); |
| 2700 | return RX_QUEUED; |
| 2701 | |
| 2702 | queue: |
| 2703 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
| 2704 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
| 2705 | ieee80211_queue_work(&local->hw, &sdata->work); |
| 2706 | if (rx->sta) |
| 2707 | rx->sta->rx_packets++; |
| 2708 | return RX_QUEUED; |
| 2709 | } |
| 2710 | |
| 2711 | static ieee80211_rx_result debug_noinline |
| 2712 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) |
| 2713 | { |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2714 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2715 | int sig = 0; |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2716 | |
| 2717 | /* skip known-bad action frames and return them in the next handler */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2718 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2719 | return RX_CONTINUE; |
Felix Fietkau | d790744 | 2010-01-07 20:23:53 +0100 | [diff] [blame] | 2720 | |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2721 | /* |
| 2722 | * Getting here means the kernel doesn't know how to handle |
| 2723 | * it, but maybe userspace does ... include returned frames |
| 2724 | * so userspace can register for those to know whether ones |
| 2725 | * it transmitted were processed or returned. |
| 2726 | */ |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2727 | |
Johannes Berg | 804483e | 2012-03-05 22:18:41 +0100 | [diff] [blame] | 2728 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
| 2729 | sig = status->signal; |
| 2730 | |
Johannes Berg | 71bbc99 | 2012-06-15 15:30:18 +0200 | [diff] [blame] | 2731 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
Vladimir Kondratiev | 19504cf | 2013-08-15 14:51:28 +0300 | [diff] [blame] | 2732 | rx->skb->data, rx->skb->len, 0, GFP_ATOMIC)) { |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2733 | if (rx->sta) |
| 2734 | rx->sta->rx_packets++; |
| 2735 | dev_kfree_skb(rx->skb); |
| 2736 | return RX_QUEUED; |
| 2737 | } |
| 2738 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2739 | return RX_CONTINUE; |
| 2740 | } |
| 2741 | |
| 2742 | static ieee80211_rx_result debug_noinline |
| 2743 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) |
| 2744 | { |
| 2745 | struct ieee80211_local *local = rx->local; |
| 2746 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
| 2747 | struct sk_buff *nskb; |
| 2748 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2749 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2750 | |
| 2751 | if (!ieee80211_is_action(mgmt->frame_control)) |
| 2752 | return RX_CONTINUE; |
| 2753 | |
| 2754 | /* |
| 2755 | * For AP mode, hostapd is responsible for handling any action |
| 2756 | * frames that we didn't handle, including returning unknown |
| 2757 | * ones. For all other modes we will return them to the sender, |
| 2758 | * setting the 0x80 bit in the action category, as required by |
Johannes Berg | 4b5ebcc | 2012-06-27 15:38:56 +0200 | [diff] [blame] | 2759 | * 802.11-2012 9.24.4. |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2760 | * Newer versions of hostapd shall also use the management frame |
| 2761 | * registration mechanisms, but older ones still use cooked |
| 2762 | * monitor interfaces so push all frames there. |
| 2763 | */ |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2764 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 2765 | (sdata->vif.type == NL80211_IFTYPE_AP || |
| 2766 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
| 2767 | return RX_DROP_MONITOR; |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 2768 | |
Johannes Berg | 4b5ebcc | 2012-06-27 15:38:56 +0200 | [diff] [blame] | 2769 | if (is_multicast_ether_addr(mgmt->da)) |
| 2770 | return RX_DROP_MONITOR; |
| 2771 | |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2772 | /* do not return rejected action frames */ |
| 2773 | if (mgmt->u.action.category & 0x80) |
| 2774 | return RX_DROP_UNUSABLE; |
| 2775 | |
| 2776 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, |
| 2777 | GFP_ATOMIC); |
| 2778 | if (nskb) { |
John W. Linville | 292b4df | 2010-06-24 11:13:56 -0400 | [diff] [blame] | 2779 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2780 | |
John W. Linville | 292b4df | 2010-06-24 11:13:56 -0400 | [diff] [blame] | 2781 | nmgmt->u.action.category |= 0x80; |
| 2782 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); |
| 2783 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8404080 | 2010-02-15 12:46:39 +0200 | [diff] [blame] | 2784 | |
| 2785 | memset(nskb->cb, 0, sizeof(nskb->cb)); |
| 2786 | |
Johannes Berg | 07e5a5f | 2013-03-07 13:22:05 +0100 | [diff] [blame] | 2787 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
| 2788 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); |
| 2789 | |
| 2790 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | |
| 2791 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | |
| 2792 | IEEE80211_TX_CTL_NO_CCK_RATE; |
| 2793 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
| 2794 | info->hw_queue = |
| 2795 | local->hw.offchannel_tx_hw_queue; |
| 2796 | } |
| 2797 | |
| 2798 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, |
| 2799 | status->band); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2800 | } |
Johannes Berg | 39192c0 | 2008-09-09 14:49:03 +0200 | [diff] [blame] | 2801 | dev_kfree_skb(rx->skb); |
| 2802 | return RX_QUEUED; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 2803 | } |
| 2804 | |
| 2805 | static ieee80211_rx_result debug_noinline |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2806 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2807 | { |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2808 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2809 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
| 2810 | __le16 stype; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2811 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2812 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
Johannes Berg | 472dbc4 | 2008-09-11 00:01:49 +0200 | [diff] [blame] | 2813 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2814 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
| 2815 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2816 | sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2817 | return RX_DROP_MONITOR; |
Johannes Berg | f9d540e | 2007-09-28 14:02:09 +0200 | [diff] [blame] | 2818 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2819 | switch (stype) { |
Johannes Berg | 66e67e4 | 2012-01-20 13:55:27 +0100 | [diff] [blame] | 2820 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2821 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
| 2822 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): |
| 2823 | /* process for all: mesh, mlme, ibss */ |
| 2824 | break; |
Johannes Berg | 66e67e4 | 2012-01-20 13:55:27 +0100 | [diff] [blame] | 2825 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
| 2826 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2827 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
| 2828 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): |
Christian Lamparter | 2c31333 | 2010-11-29 20:53:23 +0100 | [diff] [blame] | 2829 | if (is_multicast_ether_addr(mgmt->da) && |
| 2830 | !is_broadcast_ether_addr(mgmt->da)) |
| 2831 | return RX_DROP_MONITOR; |
| 2832 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2833 | /* process only for station */ |
| 2834 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 2835 | return RX_DROP_MONITOR; |
| 2836 | break; |
| 2837 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): |
Thomas Pedersen | 9fb04b5 | 2013-02-14 11:20:14 -0800 | [diff] [blame] | 2838 | /* process only for ibss and mesh */ |
| 2839 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && |
| 2840 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2841 | return RX_DROP_MONITOR; |
| 2842 | break; |
| 2843 | default: |
| 2844 | return RX_DROP_MONITOR; |
| 2845 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2846 | |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2847 | /* queue up frame and kick off work to process it */ |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 2848 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2849 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
| 2850 | ieee80211_queue_work(&rx->local->hw, &sdata->work); |
Johannes Berg | 8b58ff8 | 2010-06-10 10:21:51 +0200 | [diff] [blame] | 2851 | if (rx->sta) |
| 2852 | rx->sta->rx_packets++; |
Johannes Berg | 77a121c | 2010-06-10 10:21:34 +0200 | [diff] [blame] | 2853 | |
| 2854 | return RX_QUEUED; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 2855 | } |
| 2856 | |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 2857 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
Johannes Berg | 5f0b7de | 2009-11-16 13:58:21 +0100 | [diff] [blame] | 2858 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
| 2859 | struct ieee80211_rate *rate) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2860 | { |
| 2861 | struct ieee80211_sub_if_data *sdata; |
| 2862 | struct ieee80211_local *local = rx->local; |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2863 | struct sk_buff *skb = rx->skb, *skb2; |
| 2864 | struct net_device *prev_dev = NULL; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 2865 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2866 | int needed_headroom; |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2867 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2868 | /* |
| 2869 | * If cooked monitor has been processed already, then |
| 2870 | * don't do it again. If not, set the flag. |
| 2871 | */ |
| 2872 | if (rx->flags & IEEE80211_RX_CMNTR) |
John W. Linville | 7c1e183 | 2010-09-24 15:52:49 -0400 | [diff] [blame] | 2873 | goto out_free_skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2874 | rx->flags |= IEEE80211_RX_CMNTR; |
John W. Linville | 7c1e183 | 2010-09-24 15:52:49 -0400 | [diff] [blame] | 2875 | |
Johannes Berg | 152c477 | 2011-10-21 10:22:22 +0200 | [diff] [blame] | 2876 | /* If there are no cooked monitor interfaces, just free the SKB */ |
| 2877 | if (!local->cooked_mntrs) |
| 2878 | goto out_free_skb; |
| 2879 | |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2880 | /* room for the radiotap header based on driver features */ |
Johannes Berg | 90b9e446 | 2012-11-16 10:09:08 +0100 | [diff] [blame] | 2881 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2882 | |
| 2883 | if (skb_headroom(skb) < needed_headroom && |
| 2884 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2885 | goto out_free_skb; |
| 2886 | |
Johannes Berg | 293702a | 2012-03-02 13:18:19 +0100 | [diff] [blame] | 2887 | /* prepend radiotap information */ |
Felix Fietkau | 973ef21 | 2012-04-16 14:56:48 +0200 | [diff] [blame] | 2888 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
| 2889 | false); |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2890 | |
| 2891 | skb_set_mac_header(skb, 0); |
| 2892 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 2893 | skb->pkt_type = PACKET_OTHERHOST; |
| 2894 | skb->protocol = htons(ETH_P_802_2); |
| 2895 | |
| 2896 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 2897 | if (!ieee80211_sdata_running(sdata)) |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2898 | continue; |
| 2899 | |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 2900 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2901 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
| 2902 | continue; |
| 2903 | |
| 2904 | if (prev_dev) { |
| 2905 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 2906 | if (skb2) { |
| 2907 | skb2->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 2908 | netif_receive_skb(skb2); |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2909 | } |
| 2910 | } |
| 2911 | |
| 2912 | prev_dev = sdata->dev; |
| 2913 | sdata->dev->stats.rx_packets++; |
| 2914 | sdata->dev->stats.rx_bytes += skb->len; |
| 2915 | } |
| 2916 | |
| 2917 | if (prev_dev) { |
| 2918 | skb->dev = prev_dev; |
John W. Linville | 5548a8a | 2010-06-24 14:25:56 -0400 | [diff] [blame] | 2919 | netif_receive_skb(skb); |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 2920 | return; |
| 2921 | } |
Michael Wu | 3d30d94 | 2008-01-31 19:48:27 +0100 | [diff] [blame] | 2922 | |
| 2923 | out_free_skb: |
| 2924 | dev_kfree_skb(skb); |
| 2925 | } |
| 2926 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2927 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
| 2928 | ieee80211_rx_result res) |
| 2929 | { |
| 2930 | switch (res) { |
| 2931 | case RX_DROP_MONITOR: |
| 2932 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); |
| 2933 | if (rx->sta) |
| 2934 | rx->sta->rx_dropped++; |
| 2935 | /* fall through */ |
| 2936 | case RX_CONTINUE: { |
| 2937 | struct ieee80211_rate *rate = NULL; |
| 2938 | struct ieee80211_supported_band *sband; |
| 2939 | struct ieee80211_rx_status *status; |
| 2940 | |
| 2941 | status = IEEE80211_SKB_RXCB((rx->skb)); |
| 2942 | |
| 2943 | sband = rx->local->hw.wiphy->bands[status->band]; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 2944 | if (!(status->flag & RX_FLAG_HT) && |
| 2945 | !(status->flag & RX_FLAG_VHT)) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2946 | rate = &sband->bitrates[status->rate_idx]; |
| 2947 | |
| 2948 | ieee80211_rx_cooked_monitor(rx, rate); |
| 2949 | break; |
| 2950 | } |
| 2951 | case RX_DROP_UNUSABLE: |
| 2952 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); |
| 2953 | if (rx->sta) |
| 2954 | rx->sta->rx_dropped++; |
| 2955 | dev_kfree_skb(rx->skb); |
| 2956 | break; |
| 2957 | case RX_QUEUED: |
| 2958 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); |
| 2959 | break; |
| 2960 | } |
| 2961 | } |
| 2962 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2963 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
| 2964 | struct sk_buff_head *frames) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2965 | { |
| 2966 | ieee80211_rx_result res = RX_DROP_MONITOR; |
| 2967 | struct sk_buff *skb; |
| 2968 | |
| 2969 | #define CALL_RXH(rxh) \ |
| 2970 | do { \ |
| 2971 | res = rxh(rx); \ |
| 2972 | if (res != RX_CONTINUE) \ |
| 2973 | goto rxh_next; \ |
| 2974 | } while (0); |
| 2975 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2976 | spin_lock_bh(&rx->local->rx_path_lock); |
Christian Lamparter | 24a8fda | 2010-12-30 17:25:29 +0100 | [diff] [blame] | 2977 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2978 | while ((skb = __skb_dequeue(frames))) { |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2979 | /* |
| 2980 | * all the other fields are valid across frames |
| 2981 | * that belong to an aMPDU since they are on the |
| 2982 | * same TID from the same station |
| 2983 | */ |
| 2984 | rx->skb = skb; |
| 2985 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2986 | CALL_RXH(ieee80211_rx_h_check_more_data) |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 2987 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2988 | CALL_RXH(ieee80211_rx_h_sta_process) |
Johan Almbladh | 86c228a | 2013-08-14 15:29:46 +0200 | [diff] [blame] | 2989 | CALL_RXH(ieee80211_rx_h_decrypt) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2990 | CALL_RXH(ieee80211_rx_h_defragment) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2991 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
| 2992 | /* must be after MMIC verify so header is counted in MPDU mic */ |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2993 | #ifdef CONFIG_MAC80211_MESH |
| 2994 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
| 2995 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
| 2996 | #endif |
Javier Cardona | 2154c81 | 2011-09-07 17:49:53 -0700 | [diff] [blame] | 2997 | CALL_RXH(ieee80211_rx_h_amsdu) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 2998 | CALL_RXH(ieee80211_rx_h_data) |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 2999 | |
| 3000 | /* special treatment -- needs the queue */ |
| 3001 | res = ieee80211_rx_h_ctrl(rx, frames); |
| 3002 | if (res != RX_CONTINUE) |
| 3003 | goto rxh_next; |
| 3004 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 3005 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3006 | CALL_RXH(ieee80211_rx_h_action) |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 3007 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
| 3008 | CALL_RXH(ieee80211_rx_h_action_return) |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3009 | CALL_RXH(ieee80211_rx_h_mgmt) |
| 3010 | |
| 3011 | rxh_next: |
| 3012 | ieee80211_rx_handlers_result(rx, res); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3013 | |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3014 | #undef CALL_RXH |
| 3015 | } |
Christian Lamparter | 24a8fda | 2010-12-30 17:25:29 +0100 | [diff] [blame] | 3016 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3017 | spin_unlock_bh(&rx->local->rx_path_lock); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3018 | } |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3019 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3020 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3021 | { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3022 | struct sk_buff_head reorder_release; |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3023 | ieee80211_rx_result res = RX_DROP_MONITOR; |
| 3024 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3025 | __skb_queue_head_init(&reorder_release); |
| 3026 | |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 3027 | #define CALL_RXH(rxh) \ |
| 3028 | do { \ |
| 3029 | res = rxh(rx); \ |
| 3030 | if (res != RX_CONTINUE) \ |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3031 | goto rxh_next; \ |
Luis Carlos Cobo | e32f85f | 2008-08-05 19:34:52 +0200 | [diff] [blame] | 3032 | } while (0); |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3033 | |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 3034 | CALL_RXH(ieee80211_rx_h_check) |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3035 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3036 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3037 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3038 | ieee80211_rx_handlers(rx, &reorder_release); |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3039 | return; |
Johannes Berg | 4946162 | 2008-06-30 15:10:45 +0200 | [diff] [blame] | 3040 | |
Johannes Berg | 2569a82 | 2009-11-25 17:46:17 +0100 | [diff] [blame] | 3041 | rxh_next: |
Christian Lamparter | aa0c863 | 2010-08-05 01:36:04 +0200 | [diff] [blame] | 3042 | ieee80211_rx_handlers_result(rx, res); |
| 3043 | |
| 3044 | #undef CALL_RXH |
Johannes Berg | 5890529 | 2008-01-31 19:48:25 +0100 | [diff] [blame] | 3045 | } |
| 3046 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3047 | /* |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 3048 | * This function makes calls into the RX path, therefore |
| 3049 | * it has to be invoked under RCU read lock. |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3050 | */ |
| 3051 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) |
| 3052 | { |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3053 | struct sk_buff_head frames; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3054 | struct ieee80211_rx_data rx = { |
| 3055 | .sta = sta, |
| 3056 | .sdata = sta->sdata, |
| 3057 | .local = sta->local, |
Johannes Berg | 9e26297 | 2011-07-07 18:45:03 +0200 | [diff] [blame] | 3058 | /* This is OK -- must be QoS data frame */ |
| 3059 | .security_idx = tid, |
| 3060 | .seqno_idx = tid, |
Helmut Schaa | fcf8bd3 | 2011-04-01 15:46:05 +0200 | [diff] [blame] | 3061 | .flags = 0, |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3062 | }; |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3063 | struct tid_ampdu_rx *tid_agg_rx; |
| 3064 | |
| 3065 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
| 3066 | if (!tid_agg_rx) |
| 3067 | return; |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3068 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3069 | __skb_queue_head_init(&frames); |
| 3070 | |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3071 | spin_lock(&tid_agg_rx->reorder_lock); |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3072 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
Christian Lamparter | 2c15a0c | 2010-08-24 19:22:42 +0200 | [diff] [blame] | 3073 | spin_unlock(&tid_agg_rx->reorder_lock); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3074 | |
Christian Lamparter | f9e124f | 2013-02-04 17:44:44 +0000 | [diff] [blame] | 3075 | ieee80211_rx_handlers(&rx, &frames); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 3076 | } |
| 3077 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3078 | /* main receive path */ |
| 3079 | |
Johannes Berg | 20b01f8 | 2010-09-24 11:21:05 +0200 | [diff] [blame] | 3080 | static int prepare_for_handlers(struct ieee80211_rx_data *rx, |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3081 | struct ieee80211_hdr *hdr) |
| 3082 | { |
Johannes Berg | 20b01f8 | 2010-09-24 11:21:05 +0200 | [diff] [blame] | 3083 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 3084 | struct sk_buff *skb = rx->skb; |
| 3085 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 3086 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3087 | int multicast = is_multicast_ether_addr(hdr->addr1); |
| 3088 | |
Johannes Berg | 51fb61e | 2007-12-19 01:31:27 +0100 | [diff] [blame] | 3089 | switch (sdata->vif.type) { |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3090 | case NL80211_IFTYPE_STATION: |
Johannes Berg | 9bc383d | 2009-11-19 11:55:19 +0100 | [diff] [blame] | 3091 | if (!bssid && !sdata->u.mgd.use_4addr) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3092 | return 0; |
Johannes Berg | 77fdaa1 | 2009-07-07 03:45:17 +0200 | [diff] [blame] | 3093 | if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3094 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Felix Fietkau | 4f31233 | 2011-02-05 23:48:37 +0100 | [diff] [blame] | 3095 | if (!(sdata->dev->flags & IFF_PROMISC) || |
| 3096 | sdata->u.mgd.use_4addr) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3097 | return 0; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3098 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3099 | } |
| 3100 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3101 | case NL80211_IFTYPE_ADHOC: |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3102 | if (!bssid) |
| 3103 | return 0; |
Felix Fietkau | 6329b8d | 2013-09-17 11:15:43 +0200 | [diff] [blame] | 3104 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
| 3105 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) |
| 3106 | return 0; |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 3107 | if (ieee80211_is_beacon(hdr->frame_control)) { |
Bruno Randolf | 9d9bf77 | 2008-02-18 11:21:36 +0900 | [diff] [blame] | 3108 | return 1; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3109 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
| 3110 | return 0; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3111 | } else if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3112 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Johannes Berg | 4150c57 | 2007-09-17 01:29:23 -0400 | [diff] [blame] | 3113 | if (!(sdata->dev->flags & IFF_PROMISC)) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3114 | return 0; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3115 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3116 | } else if (!rx->sta) { |
| 3117 | int rate_idx; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 3118 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
| 3119 | rate_idx = 0; /* TODO: HT/VHT rates */ |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3120 | else |
Johannes Berg | eb9fb5b | 2009-11-16 13:58:20 +0100 | [diff] [blame] | 3121 | rate_idx = status->rate_idx; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 3122 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
| 3123 | BIT(rate_idx)); |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3124 | } |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3125 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3126 | case NL80211_IFTYPE_MESH_POINT: |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3127 | if (!multicast && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3128 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3129 | if (!(sdata->dev->flags & IFF_PROMISC)) |
| 3130 | return 0; |
| 3131 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3132 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 6032f93 | 2008-02-23 15:17:07 +0100 | [diff] [blame] | 3133 | } |
| 3134 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3135 | case NL80211_IFTYPE_AP_VLAN: |
| 3136 | case NL80211_IFTYPE_AP: |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3137 | if (!bssid) { |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3138 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3139 | return 0; |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3140 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
Johannes Berg | 3df6eae | 2011-12-06 10:39:40 +0100 | [diff] [blame] | 3141 | /* |
| 3142 | * Accept public action frames even when the |
| 3143 | * BSSID doesn't match, this is used for P2P |
| 3144 | * and location updates. Note that mac80211 |
| 3145 | * itself never looks at these frames. |
| 3146 | */ |
Johannes Berg | 2b9ccd4 | 2013-05-13 16:42:40 +0200 | [diff] [blame] | 3147 | if (!multicast && |
| 3148 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
| 3149 | return 0; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3150 | if (ieee80211_is_public_action(hdr, skb->len)) |
Johannes Berg | 3df6eae | 2011-12-06 10:39:40 +0100 | [diff] [blame] | 3151 | return 1; |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3152 | if (!ieee80211_is_beacon(hdr->frame_control)) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3153 | return 0; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3154 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3155 | } |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3156 | break; |
Johannes Berg | 05c914f | 2008-09-11 00:01:58 +0200 | [diff] [blame] | 3157 | case NL80211_IFTYPE_WDS: |
Harvey Harrison | a7767f9 | 2008-07-02 16:30:51 -0700 | [diff] [blame] | 3158 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3159 | return 0; |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 3160 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3161 | return 0; |
| 3162 | break; |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3163 | case NL80211_IFTYPE_P2P_DEVICE: |
| 3164 | if (!ieee80211_is_public_action(hdr, skb->len) && |
| 3165 | !ieee80211_is_probe_req(hdr->frame_control) && |
| 3166 | !ieee80211_is_probe_resp(hdr->frame_control) && |
| 3167 | !ieee80211_is_beacon(hdr->frame_control)) |
| 3168 | return 0; |
Johannes Berg | 1b737f8 | 2013-04-18 23:42:19 +0200 | [diff] [blame] | 3169 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
| 3170 | !multicast) |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3171 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
| 3172 | break; |
Johannes Berg | 2ca27bc | 2010-09-16 14:58:23 +0200 | [diff] [blame] | 3173 | default: |
Johannes Berg | fb1c1cd | 2007-09-26 15:19:43 +0200 | [diff] [blame] | 3174 | /* should never get here */ |
Johannes Berg | f142c6b | 2012-06-18 20:07:15 +0200 | [diff] [blame] | 3175 | WARN_ON_ONCE(1); |
Johannes Berg | fb1c1cd | 2007-09-26 15:19:43 +0200 | [diff] [blame] | 3176 | break; |
Johannes Berg | 23a24de | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3177 | } |
| 3178 | |
| 3179 | return 1; |
| 3180 | } |
| 3181 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3182 | /* |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3183 | * This function returns whether or not the SKB |
| 3184 | * was destined for RX processing or not, which, |
| 3185 | * if consume is true, is equivalent to whether |
| 3186 | * or not the skb was consumed. |
| 3187 | */ |
| 3188 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, |
| 3189 | struct sk_buff *skb, bool consume) |
| 3190 | { |
| 3191 | struct ieee80211_local *local = rx->local; |
| 3192 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
| 3193 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
| 3194 | struct ieee80211_hdr *hdr = (void *)skb->data; |
| 3195 | int prepares; |
| 3196 | |
| 3197 | rx->skb = skb; |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3198 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3199 | prepares = prepare_for_handlers(rx, hdr); |
| 3200 | |
| 3201 | if (!prepares) |
| 3202 | return false; |
| 3203 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3204 | if (!consume) { |
| 3205 | skb = skb_copy(skb, GFP_ATOMIC); |
| 3206 | if (!skb) { |
| 3207 | if (net_ratelimit()) |
| 3208 | wiphy_debug(local->hw.wiphy, |
Ben Greear | b305dae | 2011-01-08 10:30:54 -0800 | [diff] [blame] | 3209 | "failed to copy skb for %s\n", |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3210 | sdata->name); |
| 3211 | return true; |
| 3212 | } |
| 3213 | |
| 3214 | rx->skb = skb; |
| 3215 | } |
| 3216 | |
| 3217 | ieee80211_invoke_rx_handlers(rx); |
| 3218 | return true; |
| 3219 | } |
| 3220 | |
| 3221 | /* |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3222 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
| 3223 | * be called with rcu_read_lock protection. |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3224 | */ |
Ron Rindjunsky | 71ebb4a | 2008-01-21 12:39:12 +0200 | [diff] [blame] | 3225 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 3226 | struct sk_buff *skb) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3227 | { |
| 3228 | struct ieee80211_local *local = hw_to_local(hw); |
| 3229 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3230 | struct ieee80211_hdr *hdr; |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3231 | __le16 fc; |
Johannes Berg | 5cf121c | 2008-02-25 16:27:43 +0100 | [diff] [blame] | 3232 | struct ieee80211_rx_data rx; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3233 | struct ieee80211_sub_if_data *prev; |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3234 | struct sta_info *sta, *tmp, *prev_sta; |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3235 | int err = 0; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3236 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3237 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3238 | memset(&rx, 0, sizeof(rx)); |
| 3239 | rx.skb = skb; |
| 3240 | rx.local = local; |
Johannes Berg | 72abd81 | 2007-09-17 01:29:22 -0400 | [diff] [blame] | 3241 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3242 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3243 | local->dot11ReceivedFragmentCount++; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3244 | |
Johannes Berg | 4a4f1a5 | 2012-10-26 00:33:36 +0200 | [diff] [blame] | 3245 | if (ieee80211_is_mgmt(fc)) { |
| 3246 | /* drop frame if too short for header */ |
| 3247 | if (skb->len < ieee80211_hdrlen(fc)) |
| 3248 | err = -ENOBUFS; |
| 3249 | else |
| 3250 | err = skb_linearize(skb); |
| 3251 | } else { |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3252 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
Johannes Berg | 4a4f1a5 | 2012-10-26 00:33:36 +0200 | [diff] [blame] | 3253 | } |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3254 | |
| 3255 | if (err) { |
| 3256 | dev_kfree_skb(skb); |
| 3257 | return; |
| 3258 | } |
| 3259 | |
| 3260 | hdr = (struct ieee80211_hdr *)skb->data; |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 3261 | ieee80211_parse_qos(&rx); |
Johannes Berg | d1c3a37 | 2009-01-07 00:26:10 +0100 | [diff] [blame] | 3262 | ieee80211_verify_alignment(&rx); |
Johannes Berg | 38f3714 | 2008-01-29 17:07:43 +0100 | [diff] [blame] | 3263 | |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 3264 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
| 3265 | ieee80211_is_beacon(hdr->frame_control))) |
| 3266 | ieee80211_scan_rx(local, skb); |
| 3267 | |
Zhu Yi | e3cf8b3 | 2010-03-29 17:35:07 +0800 | [diff] [blame] | 3268 | if (ieee80211_is_data(fc)) { |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3269 | prev_sta = NULL; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3270 | |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3271 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3272 | if (!prev_sta) { |
| 3273 | prev_sta = sta; |
| 3274 | continue; |
| 3275 | } |
| 3276 | |
| 3277 | rx.sta = prev_sta; |
| 3278 | rx.sdata = prev_sta->sdata; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3279 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3280 | |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3281 | prev_sta = sta; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3282 | } |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3283 | |
| 3284 | if (prev_sta) { |
| 3285 | rx.sta = prev_sta; |
| 3286 | rx.sdata = prev_sta->sdata; |
| 3287 | |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3288 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3289 | return; |
Senthil Balasubramanian | 8e26d5a | 2010-11-30 20:15:38 +0530 | [diff] [blame] | 3290 | goto out; |
Ben Greear | 56af326 | 2010-09-23 10:22:24 -0700 | [diff] [blame] | 3291 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3292 | } |
| 3293 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3294 | prev = NULL; |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3295 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3296 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 3297 | if (!ieee80211_sdata_running(sdata)) |
| 3298 | continue; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 3299 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3300 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
| 3301 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 3302 | continue; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 3303 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3304 | /* |
| 3305 | * frame is destined for this interface, but if it's |
| 3306 | * not also for the previous one we handle that after |
| 3307 | * the loop to avoid copying the SKB once too much |
| 3308 | */ |
Johannes Berg | b2e7771 | 2007-09-26 15:19:39 +0200 | [diff] [blame] | 3309 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3310 | if (!prev) { |
Johannes Berg | 340e11f | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3311 | prev = sdata; |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3312 | continue; |
Johannes Berg | 8e6f0032 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3313 | } |
Felix Fietkau | 4bb29f8 | 2010-01-22 00:36:39 +0100 | [diff] [blame] | 3314 | |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3315 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3316 | rx.sdata = prev; |
| 3317 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
Felix Fietkau | 4bb29f8 | 2010-01-22 00:36:39 +0100 | [diff] [blame] | 3318 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3319 | prev = sdata; |
| 3320 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3321 | |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3322 | if (prev) { |
Johannes Berg | 7852e36 | 2012-01-20 13:55:24 +0100 | [diff] [blame] | 3323 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
Johannes Berg | 4b0dd98 | 2010-09-24 11:21:07 +0200 | [diff] [blame] | 3324 | rx.sdata = prev; |
| 3325 | |
| 3326 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
| 3327 | return; |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3328 | } |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3329 | |
Senthil Balasubramanian | 8e26d5a | 2010-11-30 20:15:38 +0530 | [diff] [blame] | 3330 | out: |
Johannes Berg | 4406c37 | 2010-09-24 11:21:06 +0200 | [diff] [blame] | 3331 | dev_kfree_skb(skb); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3332 | } |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3333 | |
| 3334 | /* |
| 3335 | * This is the receive path handler. It is called by a low level driver when an |
| 3336 | * 802.11 MPDU is received from the hardware. |
| 3337 | */ |
John W. Linville | 103bf9f | 2009-08-20 16:34:15 -0400 | [diff] [blame] | 3338 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3339 | { |
| 3340 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3341 | struct ieee80211_rate *rate = NULL; |
| 3342 | struct ieee80211_supported_band *sband; |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3343 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3344 | |
Johannes Berg | d20ef63 | 2009-10-11 15:10:40 +0200 | [diff] [blame] | 3345 | WARN_ON_ONCE(softirq_count() == 0); |
| 3346 | |
Johannes Berg | 444e3803 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3347 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3348 | goto drop; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3349 | |
| 3350 | sband = local->hw.wiphy->bands[status->band]; |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3351 | if (WARN_ON(!sband)) |
| 3352 | goto drop; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 3353 | |
Johannes Berg | 89c3a8a | 2009-07-28 18:10:17 +0200 | [diff] [blame] | 3354 | /* |
| 3355 | * If we're suspending, it is possible although not too likely |
| 3356 | * that we'd be receiving frames after having already partially |
| 3357 | * quiesced the stack. We can't process such frames then since |
| 3358 | * that might, for example, cause stations to be added or other |
| 3359 | * driver callbacks be invoked. |
| 3360 | */ |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3361 | if (unlikely(local->quiescing || local->suspended)) |
| 3362 | goto drop; |
Johannes Berg | 89c3a8a | 2009-07-28 18:10:17 +0200 | [diff] [blame] | 3363 | |
Arik Nemtsov | 04800ad | 2012-06-06 11:25:02 +0300 | [diff] [blame] | 3364 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
| 3365 | if (unlikely(local->in_reconfig)) |
| 3366 | goto drop; |
| 3367 | |
Johannes Berg | ea77f12 | 2009-08-21 14:44:45 +0200 | [diff] [blame] | 3368 | /* |
| 3369 | * The same happens when we're not even started, |
| 3370 | * but that's worth a warning. |
| 3371 | */ |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3372 | if (WARN_ON(!local->started)) |
| 3373 | goto drop; |
Johannes Berg | ea77f12 | 2009-08-21 14:44:45 +0200 | [diff] [blame] | 3374 | |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3375 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
Luis R. Rodriguez | e5d6eb8 | 2009-11-09 16:03:22 -0500 | [diff] [blame] | 3376 | /* |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3377 | * Validate the rate, unless a PLCP error means that |
| 3378 | * we probably can't have a valid rate here anyway. |
Luis R. Rodriguez | e5d6eb8 | 2009-11-09 16:03:22 -0500 | [diff] [blame] | 3379 | */ |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3380 | |
| 3381 | if (status->flag & RX_FLAG_HT) { |
| 3382 | /* |
| 3383 | * rate_idx is MCS index, which can be [0-76] |
| 3384 | * as documented on: |
| 3385 | * |
| 3386 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n |
| 3387 | * |
| 3388 | * Anything else would be some sort of driver or |
| 3389 | * hardware error. The driver should catch hardware |
| 3390 | * errors. |
| 3391 | */ |
Johannes Berg | 444e3803 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3392 | if (WARN(status->rate_idx > 76, |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3393 | "Rate marked as an HT rate but passed " |
| 3394 | "status->rate_idx is not " |
| 3395 | "an MCS index [0-76]: %d (0x%02x)\n", |
| 3396 | status->rate_idx, |
| 3397 | status->rate_idx)) |
| 3398 | goto drop; |
Johannes Berg | 5614618 | 2012-11-09 15:07:02 +0100 | [diff] [blame] | 3399 | } else if (status->flag & RX_FLAG_VHT) { |
| 3400 | if (WARN_ONCE(status->rate_idx > 9 || |
| 3401 | !status->vht_nss || |
| 3402 | status->vht_nss > 8, |
| 3403 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", |
| 3404 | status->rate_idx, status->vht_nss)) |
| 3405 | goto drop; |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3406 | } else { |
Johannes Berg | 444e3803 | 2012-09-30 17:08:35 +0200 | [diff] [blame] | 3407 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
Johannes Berg | fc88518 | 2010-07-30 13:23:12 +0200 | [diff] [blame] | 3408 | goto drop; |
| 3409 | rate = &sband->bitrates[status->rate_idx]; |
| 3410 | } |
Jouni Malinen | 0fb8ca4 | 2008-12-12 14:38:33 +0200 | [diff] [blame] | 3411 | } |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3412 | |
Johannes Berg | 554891e | 2010-09-24 12:38:25 +0200 | [diff] [blame] | 3413 | status->rx_flags = 0; |
| 3414 | |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3415 | /* |
| 3416 | * key references and virtual interfaces are protected using RCU |
| 3417 | * and this requires that we are in a read-side RCU section during |
| 3418 | * receive processing |
| 3419 | */ |
| 3420 | rcu_read_lock(); |
| 3421 | |
| 3422 | /* |
| 3423 | * Frames with failed FCS/PLCP checksum are not returned, |
| 3424 | * all other frames are returned without radiotap header |
| 3425 | * if it was previously present. |
| 3426 | * Also, frames with less than 16 bytes are dropped. |
| 3427 | */ |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3428 | skb = ieee80211_rx_monitor(local, skb, rate); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3429 | if (!skb) { |
| 3430 | rcu_read_unlock(); |
| 3431 | return; |
| 3432 | } |
| 3433 | |
Johannes Berg | e1e5406 | 2010-11-30 08:58:45 +0100 | [diff] [blame] | 3434 | ieee80211_tpt_led_trig_rx(local, |
| 3435 | ((struct ieee80211_hdr *)skb->data)->frame_control, |
| 3436 | skb->len); |
Christian Lamparter | 071d9ac | 2010-08-05 01:36:36 +0200 | [diff] [blame] | 3437 | __ieee80211_rx_handle_packet(hw, skb); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3438 | |
| 3439 | rcu_read_unlock(); |
Johannes Berg | 77a980d | 2009-08-24 11:46:30 +0200 | [diff] [blame] | 3440 | |
| 3441 | return; |
| 3442 | drop: |
| 3443 | kfree_skb(skb); |
Ron Rindjunsky | 6368e4b | 2007-12-24 13:36:39 +0200 | [diff] [blame] | 3444 | } |
John W. Linville | 103bf9f | 2009-08-20 16:34:15 -0400 | [diff] [blame] | 3445 | EXPORT_SYMBOL(ieee80211_rx); |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3446 | |
| 3447 | /* This is a version of the rx handler that can be called from hard irq |
| 3448 | * context. Post the skb on the queue and schedule the tasklet */ |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 3449 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3450 | { |
| 3451 | struct ieee80211_local *local = hw_to_local(hw); |
| 3452 | |
| 3453 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); |
| 3454 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame] | 3455 | skb->pkt_type = IEEE80211_RX_MSG; |
| 3456 | skb_queue_tail(&local->skb_queue, skb); |
| 3457 | tasklet_schedule(&local->tasklet); |
| 3458 | } |
| 3459 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |