Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 2 | /* |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 3 | * Scanning implementation |
| 4 | * |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 5 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> |
| 6 | * Copyright 2004, Instant802 Networks, Inc. |
| 7 | * Copyright 2005, Devicescape Software, Inc. |
| 8 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 9 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
Sara Sharon | 74d803b | 2015-06-03 10:44:17 +0300 | [diff] [blame] | 10 | * Copyright 2013-2015 Intel Mobile Communications GmbH |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 11 | * Copyright 2016-2017 Intel Deutschland GmbH |
Johannes Berg | 62a6183 | 2024-01-29 20:09:07 +0100 | [diff] [blame] | 12 | * Copyright (C) 2018-2024 Intel Corporation |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 13 | */ |
| 14 | |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 15 | #include <linux/if_arp.h> |
Felix Fietkau | 888d04d | 2012-03-01 15:22:09 +0100 | [diff] [blame] | 16 | #include <linux/etherdevice.h> |
Johannes Berg | 078e1e6 | 2009-01-22 18:07:31 +0100 | [diff] [blame] | 17 | #include <linux/rtnetlink.h> |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 18 | #include <net/sch_generic.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 20 | #include <linux/export.h> |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 21 | #include <linux/random.h> |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 22 | #include <net/mac80211.h> |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +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 | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 26 | #include "mesh.h" |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 27 | |
| 28 | #define IEEE80211_PROBE_DELAY (HZ / 33) |
| 29 | #define IEEE80211_CHANNEL_TIME (HZ / 33) |
Stanislaw Gruszka | 3f892b6 | 2013-01-23 12:32:45 +0100 | [diff] [blame] | 30 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 9) |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 31 | |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 32 | void ieee80211_rx_bss_put(struct ieee80211_local *local, |
Johannes Berg | c2b1345 | 2008-09-11 00:01:55 +0200 | [diff] [blame] | 33 | struct ieee80211_bss *bss) |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 34 | { |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 35 | if (!bss) |
| 36 | return; |
Johannes Berg | 5b112d3 | 2013-02-01 01:49:58 +0100 | [diff] [blame] | 37 | cfg80211_put_bss(local->hw.wiphy, |
| 38 | container_of((void *)bss, struct cfg80211_bss, priv)); |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 39 | } |
| 40 | |
Kalle Valo | ab13315 | 2010-01-12 10:42:31 +0200 | [diff] [blame] | 41 | static bool is_uapsd_supported(struct ieee802_11_elems *elems) |
| 42 | { |
| 43 | u8 qos_info; |
| 44 | |
| 45 | if (elems->wmm_info && elems->wmm_info_len == 7 |
| 46 | && elems->wmm_info[5] == 1) |
| 47 | qos_info = elems->wmm_info[6]; |
| 48 | else if (elems->wmm_param && elems->wmm_param_len == 24 |
| 49 | && elems->wmm_param[5] == 1) |
| 50 | qos_info = elems->wmm_param[6]; |
| 51 | else |
| 52 | /* no valid wmm information or parameter element found */ |
| 53 | return false; |
| 54 | |
| 55 | return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD; |
| 56 | } |
| 57 | |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 58 | struct inform_bss_update_data { |
| 59 | struct ieee80211_rx_status *rx_status; |
| 60 | bool beacon; |
| 61 | }; |
| 62 | |
| 63 | void ieee80211_inform_bss(struct wiphy *wiphy, |
| 64 | struct cfg80211_bss *cbss, |
| 65 | const struct cfg80211_bss_ies *ies, |
| 66 | void *data) |
Sara Sharon | fcea7db | 2019-01-16 20:35:38 +0200 | [diff] [blame] | 67 | { |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 68 | struct ieee80211_local *local = wiphy_priv(wiphy); |
| 69 | struct inform_bss_update_data *update_data = data; |
| 70 | struct ieee80211_bss *bss = (void *)cbss->priv; |
| 71 | struct ieee80211_rx_status *rx_status; |
| 72 | struct ieee802_11_elems *elems; |
Sara Sharon | fcea7db | 2019-01-16 20:35:38 +0200 | [diff] [blame] | 73 | int clen, srlen; |
| 74 | |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 75 | /* This happens while joining an IBSS */ |
| 76 | if (!update_data) |
| 77 | return; |
| 78 | |
| 79 | elems = ieee802_11_parse_elems(ies->data, ies->len, false, NULL); |
| 80 | if (!elems) |
| 81 | return; |
| 82 | |
| 83 | rx_status = update_data->rx_status; |
| 84 | |
| 85 | if (update_data->beacon) |
Sara Sharon | fcea7db | 2019-01-16 20:35:38 +0200 | [diff] [blame] | 86 | bss->device_ts_beacon = rx_status->device_timestamp; |
| 87 | else |
| 88 | bss->device_ts_presp = rx_status->device_timestamp; |
| 89 | |
| 90 | if (elems->parse_error) { |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 91 | if (update_data->beacon) |
Sara Sharon | fcea7db | 2019-01-16 20:35:38 +0200 | [diff] [blame] | 92 | bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON; |
| 93 | else |
| 94 | bss->corrupt_data |= IEEE80211_BSS_CORRUPT_PROBE_RESP; |
| 95 | } else { |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 96 | if (update_data->beacon) |
Sara Sharon | fcea7db | 2019-01-16 20:35:38 +0200 | [diff] [blame] | 97 | bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_BEACON; |
| 98 | else |
| 99 | bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_PROBE_RESP; |
| 100 | } |
| 101 | |
| 102 | /* save the ERP value so that it is available at association time */ |
| 103 | if (elems->erp_info && (!elems->parse_error || |
| 104 | !(bss->valid_data & IEEE80211_BSS_VALID_ERP))) { |
| 105 | bss->erp_value = elems->erp_info[0]; |
| 106 | bss->has_erp_value = true; |
| 107 | if (!elems->parse_error) |
| 108 | bss->valid_data |= IEEE80211_BSS_VALID_ERP; |
| 109 | } |
| 110 | |
| 111 | /* replace old supported rates if we get new values */ |
| 112 | if (!elems->parse_error || |
| 113 | !(bss->valid_data & IEEE80211_BSS_VALID_RATES)) { |
| 114 | srlen = 0; |
| 115 | if (elems->supp_rates) { |
| 116 | clen = IEEE80211_MAX_SUPP_RATES; |
| 117 | if (clen > elems->supp_rates_len) |
| 118 | clen = elems->supp_rates_len; |
| 119 | memcpy(bss->supp_rates, elems->supp_rates, clen); |
| 120 | srlen += clen; |
| 121 | } |
| 122 | if (elems->ext_supp_rates) { |
| 123 | clen = IEEE80211_MAX_SUPP_RATES - srlen; |
| 124 | if (clen > elems->ext_supp_rates_len) |
| 125 | clen = elems->ext_supp_rates_len; |
| 126 | memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, |
| 127 | clen); |
| 128 | srlen += clen; |
| 129 | } |
| 130 | if (srlen) { |
| 131 | bss->supp_rates_len = srlen; |
| 132 | if (!elems->parse_error) |
| 133 | bss->valid_data |= IEEE80211_BSS_VALID_RATES; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | if (!elems->parse_error || |
| 138 | !(bss->valid_data & IEEE80211_BSS_VALID_WMM)) { |
| 139 | bss->wmm_used = elems->wmm_param || elems->wmm_info; |
| 140 | bss->uapsd_supported = is_uapsd_supported(elems); |
| 141 | if (!elems->parse_error) |
| 142 | bss->valid_data |= IEEE80211_BSS_VALID_WMM; |
| 143 | } |
| 144 | |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 145 | if (update_data->beacon) { |
Sara Sharon | fcea7db | 2019-01-16 20:35:38 +0200 | [diff] [blame] | 146 | struct ieee80211_supported_band *sband = |
| 147 | local->hw.wiphy->bands[rx_status->band]; |
| 148 | if (!(rx_status->encoding == RX_ENC_HT) && |
| 149 | !(rx_status->encoding == RX_ENC_VHT)) |
| 150 | bss->beacon_rate = |
| 151 | &sband->bitrates[rx_status->rate_idx]; |
| 152 | } |
Johannes Berg | 2a333a0 | 2020-05-28 21:34:35 +0200 | [diff] [blame] | 153 | |
| 154 | if (elems->vht_cap_elem) |
| 155 | bss->vht_cap_info = |
| 156 | le32_to_cpu(elems->vht_cap_elem->vht_cap_info); |
| 157 | else |
| 158 | bss->vht_cap_info = 0; |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 159 | |
| 160 | kfree(elems); |
Sara Sharon | fcea7db | 2019-01-16 20:35:38 +0200 | [diff] [blame] | 161 | } |
| 162 | |
Johannes Berg | c2b1345 | 2008-09-11 00:01:55 +0200 | [diff] [blame] | 163 | struct ieee80211_bss * |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 164 | ieee80211_bss_info_update(struct ieee80211_local *local, |
| 165 | struct ieee80211_rx_status *rx_status, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 166 | struct ieee80211_mgmt *mgmt, size_t len, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 167 | struct ieee80211_channel *channel) |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 168 | { |
Thomas Pedersen | cd418ba | 2020-09-21 19:28:08 -0700 | [diff] [blame] | 169 | bool beacon = ieee80211_is_beacon(mgmt->frame_control) || |
| 170 | ieee80211_is_s1g_beacon(mgmt->frame_control); |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 171 | struct cfg80211_bss *cbss; |
| 172 | struct inform_bss_update_data update_data = { |
| 173 | .rx_status = rx_status, |
| 174 | .beacon = beacon, |
| 175 | }; |
Johannes Berg | 162dd6a | 2016-02-23 23:05:06 +0200 | [diff] [blame] | 176 | struct cfg80211_inform_bss bss_meta = { |
| 177 | .boottime_ns = rx_status->boottime_ns, |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 178 | .drv_data = (void *)&update_data, |
Johannes Berg | 162dd6a | 2016-02-23 23:05:06 +0200 | [diff] [blame] | 179 | }; |
Sara Sharon | 74d803b | 2015-06-03 10:44:17 +0300 | [diff] [blame] | 180 | bool signal_valid; |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 181 | struct ieee80211_sub_if_data *scan_sdata; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 182 | |
Tosoni | 1ad22fb | 2018-03-14 16:58:34 +0000 | [diff] [blame] | 183 | if (rx_status->flag & RX_FLAG_NO_SIGNAL_VAL) |
| 184 | bss_meta.signal = 0; /* invalid signal indication */ |
| 185 | else if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) |
Johannes Berg | 61f6bba | 2015-10-13 11:36:21 +0200 | [diff] [blame] | 186 | bss_meta.signal = rx_status->signal * 100; |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 187 | else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) |
Johannes Berg | 61f6bba | 2015-10-13 11:36:21 +0200 | [diff] [blame] | 188 | bss_meta.signal = (rx_status->signal * 100) / local->hw.max_signal; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 189 | |
Johannes Berg | 61f6bba | 2015-10-13 11:36:21 +0200 | [diff] [blame] | 190 | bss_meta.chan = channel; |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 191 | |
| 192 | rcu_read_lock(); |
| 193 | scan_sdata = rcu_dereference(local->scan_sdata); |
| 194 | if (scan_sdata && scan_sdata->vif.type == NL80211_IFTYPE_STATION && |
Johannes Berg | f276e20 | 2022-05-10 17:05:04 +0200 | [diff] [blame] | 195 | scan_sdata->vif.cfg.assoc && |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 196 | ieee80211_have_rx_timestamp(rx_status)) { |
Ilan Peer | cbde0b4 | 2023-11-13 11:35:01 +0200 | [diff] [blame] | 197 | struct ieee80211_bss_conf *link_conf = NULL; |
| 198 | |
| 199 | /* for an MLO connection, set the TSF data only in case we have |
| 200 | * an indication on which of the links the frame was received |
| 201 | */ |
| 202 | if (ieee80211_vif_is_mld(&scan_sdata->vif)) { |
| 203 | if (rx_status->link_valid) { |
| 204 | s8 link_id = rx_status->link_id; |
| 205 | |
| 206 | link_conf = |
| 207 | rcu_dereference(scan_sdata->vif.link_conf[link_id]); |
| 208 | } |
| 209 | } else { |
| 210 | link_conf = &scan_sdata->vif.bss_conf; |
| 211 | } |
| 212 | |
| 213 | if (link_conf) { |
| 214 | bss_meta.parent_tsf = |
| 215 | ieee80211_calculate_rx_timestamp(local, |
| 216 | rx_status, |
| 217 | len + FCS_LEN, |
| 218 | 24); |
| 219 | |
| 220 | ether_addr_copy(bss_meta.parent_bssid, |
| 221 | link_conf->bssid); |
| 222 | } |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 223 | } |
| 224 | rcu_read_unlock(); |
| 225 | |
Johannes Berg | 61f6bba | 2015-10-13 11:36:21 +0200 | [diff] [blame] | 226 | cbss = cfg80211_inform_bss_frame_data(local->hw.wiphy, &bss_meta, |
| 227 | mgmt, len, GFP_ATOMIC); |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 228 | if (!cbss) |
Johannes Berg | 00d3f14 | 2009-02-10 21:26:00 +0100 | [diff] [blame] | 229 | return NULL; |
Sara Sharon | 4abb52a | 2019-01-16 12:14:41 +0200 | [diff] [blame] | 230 | |
Sara Sharon | 74d803b | 2015-06-03 10:44:17 +0300 | [diff] [blame] | 231 | /* In case the signal is invalid update the status */ |
Emmanuel Grumbach | 7bb106e | 2020-02-14 23:23:38 +0100 | [diff] [blame] | 232 | signal_valid = channel == cbss->channel; |
Sara Sharon | 74d803b | 2015-06-03 10:44:17 +0300 | [diff] [blame] | 233 | if (!signal_valid) |
| 234 | rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL; |
Johannes Berg | 00d3f14 | 2009-02-10 21:26:00 +0100 | [diff] [blame] | 235 | |
Benjamin Berg | 108d2022 | 2023-06-16 09:54:01 +0300 | [diff] [blame] | 236 | return (void *)cbss->priv; |
Johannes Berg | 5484e23 | 2008-09-08 17:44:27 +0200 | [diff] [blame] | 237 | } |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 238 | |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 239 | static bool ieee80211_scan_accept_presp(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 62a6183 | 2024-01-29 20:09:07 +0100 | [diff] [blame] | 240 | struct ieee80211_channel *channel, |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 241 | u32 scan_flags, const u8 *da) |
| 242 | { |
| 243 | if (!sdata) |
| 244 | return false; |
Johannes Berg | 62a6183 | 2024-01-29 20:09:07 +0100 | [diff] [blame] | 245 | |
| 246 | /* accept broadcast on 6 GHz and for OCE */ |
| 247 | if (is_broadcast_ether_addr(da) && |
| 248 | (channel->band == NL80211_BAND_6GHZ || |
| 249 | scan_flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP)) |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 250 | return true; |
Johannes Berg | 62a6183 | 2024-01-29 20:09:07 +0100 | [diff] [blame] | 251 | |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 252 | if (scan_flags & NL80211_SCAN_FLAG_RANDOM_ADDR) |
| 253 | return true; |
| 254 | return ether_addr_equal(da, sdata->vif.addr); |
| 255 | } |
| 256 | |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 257 | void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb) |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 258 | { |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 259 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 260 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
Johannes Berg | c2b1345 | 2008-09-11 00:01:55 +0200 | [diff] [blame] | 261 | struct ieee80211_bss *bss; |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 262 | struct ieee80211_channel *channel; |
Du Cheng | e298aa3 | 2021-05-10 12:16:49 +0800 | [diff] [blame] | 263 | size_t min_hdr_len = offsetof(struct ieee80211_mgmt, |
| 264 | u.probe_resp.variable); |
| 265 | |
| 266 | if (!ieee80211_is_probe_resp(mgmt->frame_control) && |
| 267 | !ieee80211_is_beacon(mgmt->frame_control) && |
| 268 | !ieee80211_is_s1g_beacon(mgmt->frame_control)) |
| 269 | return; |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 270 | |
Thomas Pedersen | cd418ba | 2020-09-21 19:28:08 -0700 | [diff] [blame] | 271 | if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { |
Du Cheng | e298aa3 | 2021-05-10 12:16:49 +0800 | [diff] [blame] | 272 | if (ieee80211_is_s1g_short_beacon(mgmt->frame_control)) |
| 273 | min_hdr_len = offsetof(struct ieee80211_ext, |
| 274 | u.s1g_short_beacon.variable); |
| 275 | else |
| 276 | min_hdr_len = offsetof(struct ieee80211_ext, |
| 277 | u.s1g_beacon); |
| 278 | } |
| 279 | |
| 280 | if (skb->len < min_hdr_len) |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 281 | return; |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 282 | |
Felix Fietkau | b041b7b | 2022-04-20 12:49:07 +0200 | [diff] [blame] | 283 | if (test_and_clear_bit(SCAN_BEACON_WAIT, &local->scanning)) { |
| 284 | /* |
| 285 | * we were passive scanning because of radar/no-IR, but |
| 286 | * the beacon/proberesp rx gives us an opportunity to upgrade |
| 287 | * to active scan |
| 288 | */ |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 289 | set_bit(SCAN_BEACON_DONE, &local->scanning); |
| 290 | wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0); |
Felix Fietkau | b041b7b | 2022-04-20 12:49:07 +0200 | [diff] [blame] | 291 | } |
| 292 | |
Johannes Berg | 62a6183 | 2024-01-29 20:09:07 +0100 | [diff] [blame] | 293 | channel = ieee80211_get_channel_khz(local->hw.wiphy, |
| 294 | ieee80211_rx_status_to_khz(rx_status)); |
| 295 | |
| 296 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 297 | return; |
| 298 | |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 299 | if (ieee80211_is_probe_resp(mgmt->frame_control)) { |
Ilan Peer | ddf82e7 | 2024-02-28 09:47:39 +0100 | [diff] [blame] | 300 | struct ieee80211_sub_if_data *sdata1, *sdata2; |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 301 | struct cfg80211_scan_request *scan_req; |
| 302 | struct cfg80211_sched_scan_request *sched_scan_req; |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 303 | u32 scan_req_flags = 0, sched_scan_req_flags = 0; |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 304 | |
Ilan Peer | ddf82e7 | 2024-02-28 09:47:39 +0100 | [diff] [blame] | 305 | sdata1 = rcu_dereference(local->scan_sdata); |
| 306 | sdata2 = rcu_dereference(local->sched_scan_sdata); |
| 307 | |
| 308 | if (likely(!sdata1 && !sdata2)) |
| 309 | return; |
| 310 | |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 311 | scan_req = rcu_dereference(local->scan_req); |
| 312 | sched_scan_req = rcu_dereference(local->sched_scan_req); |
| 313 | |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 314 | if (scan_req) |
| 315 | scan_req_flags = scan_req->flags; |
| 316 | |
| 317 | if (sched_scan_req) |
| 318 | sched_scan_req_flags = sched_scan_req->flags; |
| 319 | |
| 320 | /* ignore ProbeResp to foreign address or non-bcast (OCE) |
| 321 | * unless scanning with randomised address |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 322 | */ |
Johannes Berg | 62a6183 | 2024-01-29 20:09:07 +0100 | [diff] [blame] | 323 | if (!ieee80211_scan_accept_presp(sdata1, channel, |
| 324 | scan_req_flags, |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 325 | mgmt->da) && |
Johannes Berg | 62a6183 | 2024-01-29 20:09:07 +0100 | [diff] [blame] | 326 | !ieee80211_scan_accept_presp(sdata2, channel, |
| 327 | sched_scan_req_flags, |
Roee Zamir | 40b0bd2 | 2017-08-06 11:38:23 +0300 | [diff] [blame] | 328 | mgmt->da)) |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 329 | return; |
Ilan Peer | ddf82e7 | 2024-02-28 09:47:39 +0100 | [diff] [blame] | 330 | } else { |
| 331 | /* Beacons are expected only with broadcast address */ |
| 332 | if (!is_broadcast_ether_addr(mgmt->da)) |
| 333 | return; |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 334 | } |
| 335 | |
Ilan Peer | ddf82e7 | 2024-02-28 09:47:39 +0100 | [diff] [blame] | 336 | /* Do not update the BSS table in case of only monitor interfaces */ |
| 337 | if (local->open_count == local->monitors) |
| 338 | return; |
| 339 | |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 340 | bss = ieee80211_bss_info_update(local, rx_status, |
Sara Sharon | 4abb52a | 2019-01-16 12:14:41 +0200 | [diff] [blame] | 341 | mgmt, skb->len, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 342 | channel); |
Jouni Malinen | d048e50 | 2008-10-11 03:29:55 +0300 | [diff] [blame] | 343 | if (bss) |
Johannes Berg | d48b296 | 2012-07-06 22:19:27 +0200 | [diff] [blame] | 344 | ieee80211_rx_bss_put(local, bss); |
Johannes Berg | 98c8fcc | 2008-09-08 17:44:26 +0200 | [diff] [blame] | 345 | } |
| 346 | |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 347 | static void ieee80211_prepare_scan_chandef(struct cfg80211_chan_def *chandef) |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 348 | { |
| 349 | memset(chandef, 0, sizeof(*chandef)); |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 350 | |
| 351 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 352 | } |
| 353 | |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 354 | /* return false if no more work */ |
Ilan Peer | 2ad2274 | 2020-05-28 21:34:39 +0200 | [diff] [blame] | 355 | static bool ieee80211_prep_hw_scan(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 356 | { |
Ilan Peer | 2ad2274 | 2020-05-28 21:34:39 +0200 | [diff] [blame] | 357 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 358 | struct cfg80211_scan_request *req; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 359 | struct cfg80211_chan_def chandef; |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 360 | u8 bands_used = 0; |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 361 | int i, ielen, n_chans; |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 362 | u32 flags = 0; |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 363 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 364 | req = rcu_dereference_protected(local->scan_req, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 365 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 366 | |
Emmanuel Grumbach | a754055 | 2013-09-16 11:12:07 +0300 | [diff] [blame] | 367 | if (test_bit(SCAN_HW_CANCELLED, &local->scanning)) |
| 368 | return false; |
| 369 | |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 370 | if (ieee80211_hw_check(&local->hw, SINGLE_SCAN_ON_ALL_BANDS)) { |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 371 | for (i = 0; i < req->n_channels; i++) { |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 372 | local->hw_scan_req->req.channels[i] = req->channels[i]; |
| 373 | bands_used |= BIT(req->channels[i]->band); |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 374 | } |
| 375 | |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 376 | n_chans = req->n_channels; |
| 377 | } else { |
| 378 | do { |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 379 | if (local->hw_scan_band == NUM_NL80211_BANDS) |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 380 | return false; |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 381 | |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 382 | n_chans = 0; |
| 383 | |
| 384 | for (i = 0; i < req->n_channels; i++) { |
| 385 | if (req->channels[i]->band != |
| 386 | local->hw_scan_band) |
| 387 | continue; |
| 388 | local->hw_scan_req->req.channels[n_chans] = |
| 389 | req->channels[i]; |
| 390 | n_chans++; |
| 391 | bands_used |= BIT(req->channels[i]->band); |
| 392 | } |
| 393 | |
| 394 | local->hw_scan_band++; |
| 395 | } while (!n_chans); |
| 396 | } |
| 397 | |
| 398 | local->hw_scan_req->req.n_channels = n_chans; |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 399 | ieee80211_prepare_scan_chandef(&chandef); |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 400 | |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 401 | if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) |
| 402 | flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; |
| 403 | |
Ilan Peer | 2ad2274 | 2020-05-28 21:34:39 +0200 | [diff] [blame] | 404 | ielen = ieee80211_build_preq_ies(sdata, |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 405 | (u8 *)local->hw_scan_req->req.ie, |
Johannes Berg | c604b9f | 2012-11-29 12:45:18 +0100 | [diff] [blame] | 406 | local->hw_scan_ies_bufsize, |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 407 | &local->hw_scan_req->ies, |
| 408 | req->ie, req->ie_len, |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 409 | bands_used, req->rates, &chandef, |
| 410 | flags); |
Johannes Berg | 07095d1 | 2024-01-29 20:19:33 +0100 | [diff] [blame] | 411 | if (ielen < 0) |
| 412 | return false; |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 413 | local->hw_scan_req->req.ie_len = ielen; |
| 414 | local->hw_scan_req->req.no_cck = req->no_cck; |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 415 | ether_addr_copy(local->hw_scan_req->req.mac_addr, req->mac_addr); |
| 416 | ether_addr_copy(local->hw_scan_req->req.mac_addr_mask, |
| 417 | req->mac_addr_mask); |
Jouni Malinen | e345f44 | 2016-02-26 22:12:48 +0200 | [diff] [blame] | 418 | ether_addr_copy(local->hw_scan_req->req.bssid, req->bssid); |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 419 | |
| 420 | return true; |
| 421 | } |
| 422 | |
Eliad Peller | 8bd2a24 | 2013-12-05 11:21:27 +0200 | [diff] [blame] | 423 | static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 424 | { |
| 425 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | e9da68d | 2018-10-18 10:35:47 +0200 | [diff] [blame] | 426 | bool hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning); |
Eliad Peller | a2b70e8 | 2013-12-05 11:21:28 +0200 | [diff] [blame] | 427 | bool was_scanning = local->scanning; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 428 | struct cfg80211_scan_request *scan_req; |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 429 | struct ieee80211_sub_if_data *scan_sdata; |
Sachin Kulkarni | 4fa11ec | 2016-01-12 14:30:19 +0530 | [diff] [blame] | 430 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 431 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 432 | lockdep_assert_wiphy(local->hw.wiphy); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 433 | |
Johannes Berg | 6d3560d | 2009-10-31 07:44:08 +0100 | [diff] [blame] | 434 | /* |
| 435 | * It's ok to abort a not-yet-running scan (that |
| 436 | * we have one at all will be verified by checking |
| 437 | * local->scan_req next), but not to complete it |
| 438 | * successfully. |
| 439 | */ |
| 440 | if (WARN_ON(!local->scanning && !aborted)) |
| 441 | aborted = true; |
Johannes Berg | de95a54b | 2009-04-01 11:58:36 +0200 | [diff] [blame] | 442 | |
Stanislaw Gruszka | e229f84 | 2010-10-06 11:22:09 +0200 | [diff] [blame] | 443 | if (WARN_ON(!local->scan_req)) |
Johannes Berg | d07bfd8 | 2011-03-07 15:48:41 +0100 | [diff] [blame] | 444 | return; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 445 | |
Ilan Peer | 2ad2274 | 2020-05-28 21:34:39 +0200 | [diff] [blame] | 446 | scan_sdata = rcu_dereference_protected(local->scan_sdata, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 447 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Ilan Peer | 2ad2274 | 2020-05-28 21:34:39 +0200 | [diff] [blame] | 448 | |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 449 | if (hw_scan && !aborted && |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 450 | !ieee80211_hw_check(&local->hw, SINGLE_SCAN_ON_ALL_BANDS) && |
Ilan Peer | 2ad2274 | 2020-05-28 21:34:39 +0200 | [diff] [blame] | 451 | ieee80211_prep_hw_scan(scan_sdata)) { |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 452 | int rc; |
| 453 | |
| 454 | rc = drv_hw_scan(local, |
| 455 | rcu_dereference_protected(local->scan_sdata, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 456 | lockdep_is_held(&local->hw.wiphy->mtx)), |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 457 | local->hw_scan_req); |
| 458 | |
Stanislaw Gruszka | 6eb11a9 | 2010-10-06 11:22:11 +0200 | [diff] [blame] | 459 | if (rc == 0) |
Johannes Berg | d07bfd8 | 2011-03-07 15:48:41 +0100 | [diff] [blame] | 460 | return; |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 461 | |
Johannes Berg | 7d10f6b | 2016-07-05 15:23:13 +0300 | [diff] [blame] | 462 | /* HW scan failed and is going to be reported as aborted, |
| 463 | * so clear old scan info. |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 464 | */ |
| 465 | memset(&local->scan_info, 0, sizeof(local->scan_info)); |
Johannes Berg | 7d10f6b | 2016-07-05 15:23:13 +0300 | [diff] [blame] | 466 | aborted = true; |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | kfree(local->hw_scan_req); |
| 470 | local->hw_scan_req = NULL; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 471 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 472 | scan_req = rcu_dereference_protected(local->scan_req, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 473 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 474 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 475 | RCU_INIT_POINTER(local->scan_req, NULL); |
Monam Agarwal | 0c2bef46 | 2014-03-24 00:51:43 +0530 | [diff] [blame] | 476 | RCU_INIT_POINTER(local->scan_sdata, NULL); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 477 | |
Helmut Schaa | fbe9c429 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 478 | local->scanning = 0; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 479 | local->scan_chandef.chan = NULL; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 480 | |
Siddh Raman Pant | 60deb9f | 2022-08-20 01:33:40 +0530 | [diff] [blame] | 481 | synchronize_rcu(); |
| 482 | |
| 483 | if (scan_req != local->int_scan_req) { |
| 484 | local->scan_info.aborted = aborted; |
| 485 | cfg80211_scan_done(scan_req, &local->scan_info); |
| 486 | } |
| 487 | |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 488 | /* Set power back to normal operating levels. */ |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 489 | ieee80211_hw_conf_chan(local); |
Ben Greear | b23b025 | 2011-02-04 11:54:17 -0800 | [diff] [blame] | 490 | |
Johannes Berg | a033afc | 2022-09-02 16:12:55 +0200 | [diff] [blame] | 491 | if (!hw_scan && was_scanning) { |
Ben Greear | b23b025 | 2011-02-04 11:54:17 -0800 | [diff] [blame] | 492 | ieee80211_configure_filter(local); |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 493 | drv_sw_scan_complete(local, scan_sdata); |
Stanislaw Gruszka | aacde9e | 2012-12-20 14:41:18 +0100 | [diff] [blame] | 494 | ieee80211_offchannel_return(local); |
Ben Greear | b23b025 | 2011-02-04 11:54:17 -0800 | [diff] [blame] | 495 | } |
| 496 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 497 | ieee80211_recalc_idle(local); |
Stanislaw Gruszka | e229f84 | 2010-10-06 11:22:09 +0200 | [diff] [blame] | 498 | |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 499 | ieee80211_mlme_notify_scan_completed(local); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 500 | ieee80211_ibss_notify_scan_completed(local); |
Sachin Kulkarni | 4fa11ec | 2016-01-12 14:30:19 +0530 | [diff] [blame] | 501 | |
| 502 | /* Requeue all the work that might have been ignored while |
| 503 | * the scan was in progress; if there was none this will |
| 504 | * just be a no-op for the particular interface. |
| 505 | */ |
| 506 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 507 | if (ieee80211_sdata_running(sdata)) |
Johannes Berg | 1611449 | 2023-06-06 14:49:26 +0200 | [diff] [blame] | 508 | wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); |
Sachin Kulkarni | 4fa11ec | 2016-01-12 14:30:19 +0530 | [diff] [blame] | 509 | } |
| 510 | |
Eliad Peller | a2b70e8 | 2013-12-05 11:21:28 +0200 | [diff] [blame] | 511 | if (was_scanning) |
| 512 | ieee80211_start_next_roc(local); |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 513 | } |
Johannes Berg | 8789d45 | 2010-08-26 13:30:26 +0200 | [diff] [blame] | 514 | |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 515 | void ieee80211_scan_completed(struct ieee80211_hw *hw, |
| 516 | struct cfg80211_scan_info *info) |
Johannes Berg | 8789d45 | 2010-08-26 13:30:26 +0200 | [diff] [blame] | 517 | { |
| 518 | struct ieee80211_local *local = hw_to_local(hw); |
| 519 | |
Johannes Berg | 58bd7f1 | 2016-09-14 09:37:54 +0200 | [diff] [blame] | 520 | trace_api_scan_completed(local, info->aborted); |
Johannes Berg | 8789d45 | 2010-08-26 13:30:26 +0200 | [diff] [blame] | 521 | |
| 522 | set_bit(SCAN_COMPLETED, &local->scanning); |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 523 | if (info->aborted) |
Johannes Berg | 8789d45 | 2010-08-26 13:30:26 +0200 | [diff] [blame] | 524 | set_bit(SCAN_ABORTED, &local->scanning); |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 525 | |
| 526 | memcpy(&local->scan_info, info, sizeof(*info)); |
| 527 | |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 528 | wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0); |
Johannes Berg | 8789d45 | 2010-08-26 13:30:26 +0200 | [diff] [blame] | 529 | } |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 530 | EXPORT_SYMBOL(ieee80211_scan_completed); |
| 531 | |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 532 | static int ieee80211_start_sw_scan(struct ieee80211_local *local, |
| 533 | struct ieee80211_sub_if_data *sdata) |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 534 | { |
Johannes Berg | fe57d9f | 2012-07-26 14:55:08 +0200 | [diff] [blame] | 535 | /* Software scan is not supported in multi-channel cases */ |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 536 | if (!local->emulate_chanctx) |
Johannes Berg | fe57d9f | 2012-07-26 14:55:08 +0200 | [diff] [blame] | 537 | return -EOPNOTSUPP; |
| 538 | |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 539 | /* |
| 540 | * Hardware/driver doesn't support hw_scan, so use software |
| 541 | * scanning instead. First send a nullfunc frame with power save |
| 542 | * bit on so that AP will buffer the frames for us while we are not |
| 543 | * listening, then send probe requests to each channel and wait for |
| 544 | * the responses. After all channels are scanned, tune back to the |
| 545 | * original channel and send a nullfunc frame with power save bit |
| 546 | * off to trigger the AP to send us all the buffered frames. |
| 547 | * |
| 548 | * Note that while local->sw_scanning is true everything else but |
| 549 | * nullfunc frames and probe requests will be dropped in |
| 550 | * ieee80211_tx_h_check_assoc(). |
| 551 | */ |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 552 | drv_sw_scan_start(local, sdata, local->scan_addr); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 553 | |
Rajkumar Manoharan | de312db | 2012-03-27 11:01:06 +0530 | [diff] [blame] | 554 | local->leave_oper_channel_time = jiffies; |
Helmut Schaa | 977923b | 2009-07-23 12:14:20 +0200 | [diff] [blame] | 555 | local->next_scan_state = SCAN_DECISION; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 556 | local->scan_channel_idx = 0; |
| 557 | |
Stanislaw Gruszka | aacde9e | 2012-12-20 14:41:18 +0100 | [diff] [blame] | 558 | ieee80211_offchannel_stop_vifs(local); |
Johannes Berg | a80f7c0 | 2009-12-23 13:15:32 +0100 | [diff] [blame] | 559 | |
Seth Forshee | 9c35d7d | 2013-02-11 11:21:08 -0600 | [diff] [blame] | 560 | /* ensure nullfunc is transmitted before leaving operating channel */ |
Emmanuel Grumbach | 3b24f4c | 2015-01-07 15:42:39 +0200 | [diff] [blame] | 561 | ieee80211_flush_queues(local, NULL, false); |
Seth Forshee | 9c35d7d | 2013-02-11 11:21:08 -0600 | [diff] [blame] | 562 | |
Johannes Berg | 3ac64be | 2009-08-17 16:16:53 +0200 | [diff] [blame] | 563 | ieee80211_configure_filter(local); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 564 | |
Ben Greear | 59bdf3b | 2011-02-07 13:44:38 -0800 | [diff] [blame] | 565 | /* We need to set power level at maximum rate for scanning. */ |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 566 | ieee80211_hw_conf_chan(local); |
Ben Greear | 59bdf3b | 2011-02-07 13:44:38 -0800 | [diff] [blame] | 567 | |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 568 | wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 573 | static bool __ieee80211_can_leave_ch(struct ieee80211_sub_if_data *sdata) |
| 574 | { |
| 575 | struct ieee80211_local *local = sdata->local; |
| 576 | struct ieee80211_sub_if_data *sdata_iter; |
| 577 | |
Johannes Berg | be0df01 | 2023-08-28 14:00:06 +0200 | [diff] [blame] | 578 | lockdep_assert_wiphy(local->hw.wiphy); |
| 579 | |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 580 | if (!ieee80211_is_radar_required(local)) |
| 581 | return true; |
| 582 | |
| 583 | if (!regulatory_pre_cac_allowed(local->hw.wiphy)) |
| 584 | return false; |
| 585 | |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 586 | list_for_each_entry(sdata_iter, &local->interfaces, list) { |
Johannes Berg | be0df01 | 2023-08-28 14:00:06 +0200 | [diff] [blame] | 587 | if (sdata_iter->wdev.cac_started) |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 588 | return false; |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 589 | } |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 590 | |
| 591 | return true; |
| 592 | } |
| 593 | |
Stanislaw Gruszka | 133d40f | 2012-03-28 16:01:19 +0200 | [diff] [blame] | 594 | static bool ieee80211_can_scan(struct ieee80211_local *local, |
| 595 | struct ieee80211_sub_if_data *sdata) |
| 596 | { |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 597 | if (!__ieee80211_can_leave_ch(sdata)) |
Simon Wunderlich | 164eb02 | 2013-02-08 18:16:20 +0100 | [diff] [blame] | 598 | return false; |
| 599 | |
Johannes Berg | 2eb278e | 2012-06-05 14:28:42 +0200 | [diff] [blame] | 600 | if (!list_empty(&local->roc_list)) |
Stanislaw Gruszka | 133d40f | 2012-03-28 16:01:19 +0200 | [diff] [blame] | 601 | return false; |
| 602 | |
| 603 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
Stanislaw Gruszka | 392b9ff | 2013-08-27 11:36:35 +0200 | [diff] [blame] | 604 | sdata->u.mgd.flags & IEEE80211_STA_CONNECTION_POLL) |
Stanislaw Gruszka | 133d40f | 2012-03-28 16:01:19 +0200 | [diff] [blame] | 605 | return false; |
| 606 | |
| 607 | return true; |
| 608 | } |
| 609 | |
| 610 | void ieee80211_run_deferred_scan(struct ieee80211_local *local) |
| 611 | { |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 612 | lockdep_assert_wiphy(local->hw.wiphy); |
Stanislaw Gruszka | 133d40f | 2012-03-28 16:01:19 +0200 | [diff] [blame] | 613 | |
| 614 | if (!local->scan_req || local->scanning) |
| 615 | return; |
| 616 | |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 617 | if (!ieee80211_can_scan(local, |
| 618 | rcu_dereference_protected( |
| 619 | local->scan_sdata, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 620 | lockdep_is_held(&local->hw.wiphy->mtx)))) |
Stanislaw Gruszka | 133d40f | 2012-03-28 16:01:19 +0200 | [diff] [blame] | 621 | return; |
| 622 | |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 623 | wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, |
| 624 | round_jiffies_relative(0)); |
Stanislaw Gruszka | 133d40f | 2012-03-28 16:01:19 +0200 | [diff] [blame] | 625 | } |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 626 | |
Johannes Berg | 45ad683 | 2018-05-28 15:47:39 +0200 | [diff] [blame] | 627 | static void ieee80211_send_scan_probe_req(struct ieee80211_sub_if_data *sdata, |
| 628 | const u8 *src, const u8 *dst, |
| 629 | const u8 *ssid, size_t ssid_len, |
| 630 | const u8 *ie, size_t ie_len, |
| 631 | u32 ratemask, u32 flags, u32 tx_flags, |
| 632 | struct ieee80211_channel *channel) |
| 633 | { |
| 634 | struct sk_buff *skb; |
| 635 | |
| 636 | skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, |
| 637 | ssid, ssid_len, |
| 638 | ie, ie_len, flags); |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 639 | |
Johannes Berg | 45ad683 | 2018-05-28 15:47:39 +0200 | [diff] [blame] | 640 | if (skb) { |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 641 | if (flags & IEEE80211_PROBE_FLAG_RANDOM_SN) { |
| 642 | struct ieee80211_hdr *hdr = (void *)skb->data; |
Mathy Vanhoef | 2b3dab1 | 2020-07-23 14:01:51 +0400 | [diff] [blame] | 643 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Jason A. Donenfeld | 7e3cf08 | 2022-10-05 17:23:53 +0200 | [diff] [blame] | 644 | u16 sn = get_random_u16(); |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 645 | |
Mathy Vanhoef | 2b3dab1 | 2020-07-23 14:01:51 +0400 | [diff] [blame] | 646 | info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO; |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 647 | hdr->seq_ctrl = |
| 648 | cpu_to_le16(IEEE80211_SN_TO_SEQ(sn)); |
| 649 | } |
Johannes Berg | 45ad683 | 2018-05-28 15:47:39 +0200 | [diff] [blame] | 650 | IEEE80211_SKB_CB(skb)->flags |= tx_flags; |
Mathy Vanhoef | 08aca29 | 2020-07-23 14:01:52 +0400 | [diff] [blame] | 651 | ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); |
Johannes Berg | 45ad683 | 2018-05-28 15:47:39 +0200 | [diff] [blame] | 652 | } |
| 653 | } |
| 654 | |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 655 | static void ieee80211_scan_state_send_probe(struct ieee80211_local *local, |
| 656 | unsigned long *next_delay) |
| 657 | { |
| 658 | int i; |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 659 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 660 | struct cfg80211_scan_request *scan_req; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 661 | enum nl80211_band band = local->hw.conf.chandef.chan->band; |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 662 | u32 flags = 0, tx_flags; |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 663 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 664 | scan_req = rcu_dereference_protected(local->scan_req, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 665 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 666 | |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 667 | tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 668 | if (scan_req->no_cck) |
Seth Forshee | 6c17b77 | 2013-02-11 11:21:07 -0600 | [diff] [blame] | 669 | tx_flags |= IEEE80211_TX_CTL_NO_CCK_RATE; |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 670 | if (scan_req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) |
| 671 | flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; |
| 672 | if (scan_req->flags & NL80211_SCAN_FLAG_RANDOM_SN) |
| 673 | flags |= IEEE80211_PROBE_FLAG_RANDOM_SN; |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 674 | |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 675 | sdata = rcu_dereference_protected(local->scan_sdata, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 676 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 677 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 678 | for (i = 0; i < scan_req->n_ssids; i++) |
Johannes Berg | 45ad683 | 2018-05-28 15:47:39 +0200 | [diff] [blame] | 679 | ieee80211_send_scan_probe_req( |
Jouni Malinen | e345f44 | 2016-02-26 22:12:48 +0200 | [diff] [blame] | 680 | sdata, local->scan_addr, scan_req->bssid, |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 681 | scan_req->ssids[i].ssid, scan_req->ssids[i].ssid_len, |
| 682 | scan_req->ie, scan_req->ie_len, |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 683 | scan_req->rates[band], flags, |
Johannes Berg | 45ad683 | 2018-05-28 15:47:39 +0200 | [diff] [blame] | 684 | tx_flags, local->hw.conf.chandef.chan); |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 685 | |
| 686 | /* |
| 687 | * After sending probe requests, wait for probe responses |
| 688 | * on the channel. |
| 689 | */ |
Michael-CY Lee | d60277a | 2024-01-23 13:47:52 +0800 | [diff] [blame] | 690 | *next_delay = msecs_to_jiffies(scan_req->duration) > |
| 691 | IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME ? |
| 692 | msecs_to_jiffies(scan_req->duration) - IEEE80211_PROBE_DELAY : |
| 693 | IEEE80211_CHANNEL_TIME; |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 694 | local->next_scan_state = SCAN_DECISION; |
| 695 | } |
| 696 | |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 697 | static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, |
| 698 | struct cfg80211_scan_request *req) |
| 699 | { |
| 700 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | e9da68d | 2018-10-18 10:35:47 +0200 | [diff] [blame] | 701 | bool hw_scan = local->ops->hw_scan; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 702 | int rc; |
| 703 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 704 | lockdep_assert_wiphy(local->hw.wiphy); |
Stanislaw Gruszka | e229f84 | 2010-10-06 11:22:09 +0200 | [diff] [blame] | 705 | |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 706 | if (local->scan_req) |
| 707 | return -EBUSY; |
| 708 | |
Ilan Peer | cbde0b4 | 2023-11-13 11:35:01 +0200 | [diff] [blame] | 709 | /* For an MLO connection, if a link ID was specified, validate that it |
Ayala Beker | 80b0aac | 2024-03-20 09:14:02 +0200 | [diff] [blame] | 710 | * is indeed active. |
Ilan Peer | cbde0b4 | 2023-11-13 11:35:01 +0200 | [diff] [blame] | 711 | */ |
Ayala Beker | 80b0aac | 2024-03-20 09:14:02 +0200 | [diff] [blame] | 712 | if (ieee80211_vif_is_mld(&sdata->vif) && req->tsf_report_link_id >= 0 && |
| 713 | !(sdata->vif.active_links & BIT(req->tsf_report_link_id))) |
| 714 | return -EINVAL; |
Ilan Peer | cbde0b4 | 2023-11-13 11:35:01 +0200 | [diff] [blame] | 715 | |
Aaron Komisar | dc0c18e | 2019-10-02 13:59:07 +0000 | [diff] [blame] | 716 | if (!__ieee80211_can_leave_ch(sdata)) |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 717 | return -EBUSY; |
| 718 | |
Stanislaw Gruszka | 133d40f | 2012-03-28 16:01:19 +0200 | [diff] [blame] | 719 | if (!ieee80211_can_scan(local, sdata)) { |
John W. Linville | 6e7e621 | 2010-02-08 16:38:38 -0500 | [diff] [blame] | 720 | /* wait for the work to finish/time out */ |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 721 | rcu_assign_pointer(local->scan_req, req); |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 722 | rcu_assign_pointer(local->scan_sdata, sdata); |
Johannes Berg | c0ce77b | 2010-02-03 10:22:31 +0100 | [diff] [blame] | 723 | return 0; |
| 724 | } |
| 725 | |
Johannes Berg | e9da68d | 2018-10-18 10:35:47 +0200 | [diff] [blame] | 726 | again: |
| 727 | if (hw_scan) { |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 728 | u8 *ies; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 729 | |
David Spinadel | e4dcbb3 | 2014-02-11 13:45:41 +0200 | [diff] [blame] | 730 | local->hw_scan_ies_bufsize = local->scan_ies_len + req->ie_len; |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 731 | |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 732 | if (ieee80211_hw_check(&local->hw, SINGLE_SCAN_ON_ALL_BANDS)) { |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 733 | int i, n_bands = 0; |
| 734 | u8 bands_counted = 0; |
| 735 | |
| 736 | for (i = 0; i < req->n_channels; i++) { |
| 737 | if (bands_counted & BIT(req->channels[i]->band)) |
| 738 | continue; |
| 739 | bands_counted |= BIT(req->channels[i]->band); |
| 740 | n_bands++; |
| 741 | } |
| 742 | |
| 743 | local->hw_scan_ies_bufsize *= n_bands; |
| 744 | } |
| 745 | |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 746 | local->hw_scan_req = kmalloc( |
| 747 | sizeof(*local->hw_scan_req) + |
| 748 | req->n_channels * sizeof(req->channels[0]) + |
Johannes Berg | c604b9f | 2012-11-29 12:45:18 +0100 | [diff] [blame] | 749 | local->hw_scan_ies_bufsize, GFP_KERNEL); |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 750 | if (!local->hw_scan_req) |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 751 | return -ENOMEM; |
| 752 | |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 753 | local->hw_scan_req->req.ssids = req->ssids; |
| 754 | local->hw_scan_req->req.n_ssids = req->n_ssids; |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 755 | ies = (u8 *)local->hw_scan_req + |
| 756 | sizeof(*local->hw_scan_req) + |
| 757 | req->n_channels * sizeof(req->channels[0]); |
David Spinadel | c56ef67 | 2014-02-05 15:21:13 +0200 | [diff] [blame] | 758 | local->hw_scan_req->req.ie = ies; |
| 759 | local->hw_scan_req->req.flags = req->flags; |
Jouni Malinen | e345f44 | 2016-02-26 22:12:48 +0200 | [diff] [blame] | 760 | eth_broadcast_addr(local->hw_scan_req->req.bssid); |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 761 | local->hw_scan_req->req.duration = req->duration; |
| 762 | local->hw_scan_req->req.duration_mandatory = |
| 763 | req->duration_mandatory; |
Ilan Peer | cbde0b4 | 2023-11-13 11:35:01 +0200 | [diff] [blame] | 764 | local->hw_scan_req->req.tsf_report_link_id = |
| 765 | req->tsf_report_link_id; |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 766 | |
| 767 | local->hw_scan_band = 0; |
Tova Mussai | c8cb5b8 | 2020-09-18 11:33:13 +0200 | [diff] [blame] | 768 | local->hw_scan_req->req.n_6ghz_params = req->n_6ghz_params; |
| 769 | local->hw_scan_req->req.scan_6ghz_params = |
| 770 | req->scan_6ghz_params; |
| 771 | local->hw_scan_req->req.scan_6ghz = req->scan_6ghz; |
John W. Linville | 6e7e621 | 2010-02-08 16:38:38 -0500 | [diff] [blame] | 772 | |
| 773 | /* |
| 774 | * After allocating local->hw_scan_req, we must |
| 775 | * go through until ieee80211_prep_hw_scan(), so |
| 776 | * anything that might be changed here and leave |
| 777 | * this function early must not go after this |
| 778 | * allocation. |
| 779 | */ |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 780 | } |
| 781 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 782 | rcu_assign_pointer(local->scan_req, req); |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 783 | rcu_assign_pointer(local->scan_sdata, sdata); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 784 | |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 785 | if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) |
| 786 | get_random_mask_addr(local->scan_addr, |
| 787 | req->mac_addr, |
| 788 | req->mac_addr_mask); |
| 789 | else |
| 790 | memcpy(local->scan_addr, sdata->vif.addr, ETH_ALEN); |
| 791 | |
Johannes Berg | e9da68d | 2018-10-18 10:35:47 +0200 | [diff] [blame] | 792 | if (hw_scan) { |
Helmut Schaa | fbe9c429 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 793 | __set_bit(SCAN_HW_SCANNING, &local->scanning); |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 794 | } else if ((req->n_channels == 1) && |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 795 | (req->channels[0] == local->hw.conf.chandef.chan)) { |
Johannes Berg | 9b86487 | 2012-07-26 14:38:32 +0200 | [diff] [blame] | 796 | /* |
| 797 | * If we are scanning only on the operating channel |
| 798 | * then we do not need to stop normal activities |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 799 | */ |
| 800 | unsigned long next_delay; |
| 801 | |
| 802 | __set_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); |
| 803 | |
| 804 | ieee80211_recalc_idle(local); |
| 805 | |
| 806 | /* Notify driver scan is starting, keep order of operations |
| 807 | * same as normal software scan, in case that matters. */ |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 808 | drv_sw_scan_start(local, sdata, local->scan_addr); |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 809 | |
| 810 | ieee80211_configure_filter(local); /* accept probe-responses */ |
| 811 | |
| 812 | /* We need to ensure power level is at max for scanning. */ |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 813 | ieee80211_hw_conf_chan(local); |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 814 | |
Antonio Quartulli | 4e39cca | 2015-11-21 18:13:40 +0800 | [diff] [blame] | 815 | if ((req->channels[0]->flags & (IEEE80211_CHAN_NO_IR | |
| 816 | IEEE80211_CHAN_RADAR)) || |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 817 | !req->n_ssids) { |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 818 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
Felix Fietkau | b041b7b | 2022-04-20 12:49:07 +0200 | [diff] [blame] | 819 | if (req->n_ssids) |
| 820 | set_bit(SCAN_BEACON_WAIT, &local->scanning); |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 821 | } else { |
| 822 | ieee80211_scan_state_send_probe(local, &next_delay); |
| 823 | next_delay = IEEE80211_CHANNEL_TIME; |
| 824 | } |
| 825 | |
| 826 | /* Now, just wait a bit and we are all done! */ |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 827 | wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, |
| 828 | next_delay); |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 829 | return 0; |
| 830 | } else { |
| 831 | /* Do normal software scan */ |
Helmut Schaa | fbe9c429 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 832 | __set_bit(SCAN_SW_SCANNING, &local->scanning); |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 833 | } |
John W. Linville | 6e7e621 | 2010-02-08 16:38:38 -0500 | [diff] [blame] | 834 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 835 | ieee80211_recalc_idle(local); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 836 | |
Johannes Berg | e9da68d | 2018-10-18 10:35:47 +0200 | [diff] [blame] | 837 | if (hw_scan) { |
Ilan Peer | 2ad2274 | 2020-05-28 21:34:39 +0200 | [diff] [blame] | 838 | WARN_ON(!ieee80211_prep_hw_scan(sdata)); |
Johannes Berg | a060bbf | 2010-04-27 11:59:34 +0200 | [diff] [blame] | 839 | rc = drv_hw_scan(local, sdata, local->hw_scan_req); |
Johannes Berg | a344d67 | 2014-06-12 22:24:31 +0200 | [diff] [blame] | 840 | } else { |
| 841 | rc = ieee80211_start_sw_scan(local, sdata); |
| 842 | } |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 843 | |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 844 | if (rc) { |
Johannes Berg | 4d36ec5 | 2009-10-27 20:59:55 +0100 | [diff] [blame] | 845 | kfree(local->hw_scan_req); |
| 846 | local->hw_scan_req = NULL; |
Helmut Schaa | fbe9c429 | 2009-07-23 12:14:04 +0200 | [diff] [blame] | 847 | local->scanning = 0; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 848 | |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 849 | ieee80211_recalc_idle(local); |
| 850 | |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 851 | local->scan_req = NULL; |
Monam Agarwal | 0c2bef46 | 2014-03-24 00:51:43 +0530 | [diff] [blame] | 852 | RCU_INIT_POINTER(local->scan_sdata, NULL); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 853 | } |
| 854 | |
Johannes Berg | e9da68d | 2018-10-18 10:35:47 +0200 | [diff] [blame] | 855 | if (hw_scan && rc == 1) { |
| 856 | /* |
| 857 | * we can't fall back to software for P2P-GO |
| 858 | * as it must update NoA etc. |
| 859 | */ |
| 860 | if (ieee80211_vif_type_p2p(&sdata->vif) == |
| 861 | NL80211_IFTYPE_P2P_GO) |
| 862 | return -EOPNOTSUPP; |
| 863 | hw_scan = false; |
| 864 | goto again; |
| 865 | } |
| 866 | |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 867 | return rc; |
| 868 | } |
| 869 | |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 870 | static unsigned long |
| 871 | ieee80211_scan_get_channel_time(struct ieee80211_channel *chan) |
| 872 | { |
| 873 | /* |
| 874 | * TODO: channel switching also consumes quite some time, |
| 875 | * add that delay as well to get a better estimation |
| 876 | */ |
Antonio Quartulli | 4e39cca | 2015-11-21 18:13:40 +0800 | [diff] [blame] | 877 | if (chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR)) |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 878 | return IEEE80211_PASSIVE_CHANNEL_TIME; |
| 879 | return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME; |
| 880 | } |
| 881 | |
Stanislaw Gruszka | e229f84 | 2010-10-06 11:22:09 +0200 | [diff] [blame] | 882 | static void ieee80211_scan_state_decision(struct ieee80211_local *local, |
| 883 | unsigned long *next_delay) |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 884 | { |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 885 | bool associated = false; |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 886 | bool tx_empty = true; |
| 887 | bool bad_latency; |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 888 | struct ieee80211_sub_if_data *sdata; |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 889 | struct ieee80211_channel *next_chan; |
Sam Leffler | cd2bb51 | 2012-10-11 21:03:35 -0700 | [diff] [blame] | 890 | enum mac80211_scan_state next_scan_state; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 891 | struct cfg80211_scan_request *scan_req; |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 892 | |
Johannes Berg | be0df01 | 2023-08-28 14:00:06 +0200 | [diff] [blame] | 893 | lockdep_assert_wiphy(local->hw.wiphy); |
| 894 | |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 895 | /* |
| 896 | * check if at least one STA interface is associated, |
| 897 | * check if at least one STA interface has pending tx frames |
| 898 | * and grab the lowest used beacon interval |
| 899 | */ |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 900 | list_for_each_entry(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b66 | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 901 | if (!ieee80211_sdata_running(sdata)) |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 902 | continue; |
| 903 | |
| 904 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| 905 | if (sdata->u.mgd.associated) { |
| 906 | associated = true; |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 907 | |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 908 | if (!qdisc_all_tx_empty(sdata->dev)) { |
| 909 | tx_empty = false; |
| 910 | break; |
| 911 | } |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 912 | } |
| 913 | } |
| 914 | } |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 915 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 916 | scan_req = rcu_dereference_protected(local->scan_req, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 917 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 918 | |
| 919 | next_chan = scan_req->channels[local->scan_channel_idx]; |
Ben Greear | b23b025 | 2011-02-04 11:54:17 -0800 | [diff] [blame] | 920 | |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 921 | /* |
| 922 | * we're currently scanning a different channel, let's |
| 923 | * see if we can scan another channel without interfering |
| 924 | * with the current traffic situation. |
| 925 | * |
Stanislaw Gruszka | 3f892b6 | 2013-01-23 12:32:45 +0100 | [diff] [blame] | 926 | * Keep good latency, do not stay off-channel more than 125 ms. |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 927 | */ |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 928 | |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 929 | bad_latency = time_after(jiffies + |
Stanislaw Gruszka | 3f892b6 | 2013-01-23 12:32:45 +0100 | [diff] [blame] | 930 | ieee80211_scan_get_channel_time(next_chan), |
| 931 | local->leave_oper_channel_time + HZ / 8); |
Helmut Schaa | df13cce | 2010-02-24 14:19:21 +0100 | [diff] [blame] | 932 | |
Sam Leffler | cd2bb51 | 2012-10-11 21:03:35 -0700 | [diff] [blame] | 933 | if (associated && !tx_empty) { |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 934 | if (scan_req->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) |
Sam Leffler | cd2bb51 | 2012-10-11 21:03:35 -0700 | [diff] [blame] | 935 | next_scan_state = SCAN_ABORT; |
| 936 | else |
| 937 | next_scan_state = SCAN_SUSPEND; |
Stanislaw Gruszka | 3f892b6 | 2013-01-23 12:32:45 +0100 | [diff] [blame] | 938 | } else if (associated && bad_latency) { |
Sam Leffler | cd2bb51 | 2012-10-11 21:03:35 -0700 | [diff] [blame] | 939 | next_scan_state = SCAN_SUSPEND; |
| 940 | } else { |
| 941 | next_scan_state = SCAN_SET_CHANNEL; |
| 942 | } |
| 943 | |
| 944 | local->next_scan_state = next_scan_state; |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 945 | |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 946 | *next_delay = 0; |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 947 | } |
| 948 | |
| 949 | static void ieee80211_scan_state_set_channel(struct ieee80211_local *local, |
| 950 | unsigned long *next_delay) |
| 951 | { |
| 952 | int skip; |
| 953 | struct ieee80211_channel *chan; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 954 | struct cfg80211_scan_request *scan_req; |
| 955 | |
| 956 | scan_req = rcu_dereference_protected(local->scan_req, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 957 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 958 | |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 959 | skip = 0; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 960 | chan = scan_req->channels[local->scan_channel_idx]; |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 961 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 962 | local->scan_chandef.chan = chan; |
| 963 | local->scan_chandef.center_freq1 = chan->center_freq; |
Thomas Pedersen | b6011960 | 2020-04-01 18:18:04 -0700 | [diff] [blame] | 964 | local->scan_chandef.freq1_offset = chan->freq_offset; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 965 | local->scan_chandef.center_freq2 = 0; |
Thomas Pedersen | 75b1593 | 2020-09-21 19:28:03 -0700 | [diff] [blame] | 966 | |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 967 | /* For scanning on the S1G band, detect the channel width according to |
| 968 | * the channel being scanned. |
Thomas Pedersen | 75b1593 | 2020-09-21 19:28:03 -0700 | [diff] [blame] | 969 | */ |
| 970 | if (chan->band == NL80211_BAND_S1GHZ) { |
| 971 | local->scan_chandef.width = ieee80211_s1g_channel_width(chan); |
| 972 | goto set_channel; |
| 973 | } |
| 974 | |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 975 | /* If scanning on oper channel, use whatever channel-type |
| 976 | * is currently in use. |
| 977 | */ |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 978 | if (chan == local->hw.conf.chandef.chan) |
| 979 | local->scan_chandef = local->hw.conf.chandef; |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 980 | else |
| 981 | local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT; |
Ben Greear | b23b025 | 2011-02-04 11:54:17 -0800 | [diff] [blame] | 982 | |
Thomas Pedersen | 75b1593 | 2020-09-21 19:28:03 -0700 | [diff] [blame] | 983 | set_channel: |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 984 | if (ieee80211_hw_conf_chan(local)) |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 985 | skip = 1; |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 986 | |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 987 | /* advance state machine to next channel/band */ |
| 988 | local->scan_channel_idx++; |
| 989 | |
Helmut Schaa | 0ee9c13 | 2009-07-25 17:25:51 +0200 | [diff] [blame] | 990 | if (skip) { |
| 991 | /* if we skip this channel return to the decision state */ |
| 992 | local->next_scan_state = SCAN_DECISION; |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 993 | return; |
Helmut Schaa | 0ee9c13 | 2009-07-25 17:25:51 +0200 | [diff] [blame] | 994 | } |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 995 | |
| 996 | /* |
| 997 | * Probe delay is used to update the NAV, cf. 11.1.3.2.2 |
| 998 | * (which unfortunately doesn't say _why_ step a) is done, |
| 999 | * but it waits for the probe delay or until a frame is |
| 1000 | * received - and the received frame would update the NAV). |
| 1001 | * For now, we do not support waiting until a frame is |
| 1002 | * received. |
| 1003 | * |
| 1004 | * In any case, it is not necessary for a passive scan. |
| 1005 | */ |
Antonio Quartulli | 4e39cca | 2015-11-21 18:13:40 +0800 | [diff] [blame] | 1006 | if ((chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR)) || |
| 1007 | !scan_req->n_ssids) { |
Michael-CY Lee | d60277a | 2024-01-23 13:47:52 +0800 | [diff] [blame] | 1008 | *next_delay = msecs_to_jiffies(scan_req->duration) > |
| 1009 | IEEE80211_PASSIVE_CHANNEL_TIME ? |
| 1010 | msecs_to_jiffies(scan_req->duration) : |
| 1011 | IEEE80211_PASSIVE_CHANNEL_TIME; |
Helmut Schaa | 977923b | 2009-07-23 12:14:20 +0200 | [diff] [blame] | 1012 | local->next_scan_state = SCAN_DECISION; |
Felix Fietkau | b041b7b | 2022-04-20 12:49:07 +0200 | [diff] [blame] | 1013 | if (scan_req->n_ssids) |
| 1014 | set_bit(SCAN_BEACON_WAIT, &local->scanning); |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 1015 | return; |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 1016 | } |
| 1017 | |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 1018 | /* active scan, send probes */ |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 1019 | *next_delay = IEEE80211_PROBE_DELAY; |
Helmut Schaa | 977923b | 2009-07-23 12:14:20 +0200 | [diff] [blame] | 1020 | local->next_scan_state = SCAN_SEND_PROBE; |
Helmut Schaa | 7d3be3c | 2009-07-23 12:13:41 +0200 | [diff] [blame] | 1021 | } |
| 1022 | |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1023 | static void ieee80211_scan_state_suspend(struct ieee80211_local *local, |
| 1024 | unsigned long *next_delay) |
| 1025 | { |
| 1026 | /* switch back to the operating channel */ |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1027 | local->scan_chandef.chan = NULL; |
Johannes Berg | 0a44dfc | 2024-01-29 19:34:38 +0100 | [diff] [blame] | 1028 | ieee80211_hw_conf_chan(local); |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1029 | |
Stanislaw Gruszka | aacde9e | 2012-12-20 14:41:18 +0100 | [diff] [blame] | 1030 | /* disable PS */ |
| 1031 | ieee80211_offchannel_return(local); |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1032 | |
| 1033 | *next_delay = HZ / 5; |
| 1034 | /* afterwards, resume scan & go to next channel */ |
| 1035 | local->next_scan_state = SCAN_RESUME; |
| 1036 | } |
| 1037 | |
| 1038 | static void ieee80211_scan_state_resume(struct ieee80211_local *local, |
| 1039 | unsigned long *next_delay) |
| 1040 | { |
Stanislaw Gruszka | aacde9e | 2012-12-20 14:41:18 +0100 | [diff] [blame] | 1041 | ieee80211_offchannel_stop_vifs(local); |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1042 | |
| 1043 | if (local->ops->flush) { |
Emmanuel Grumbach | 3b24f4c | 2015-01-07 15:42:39 +0200 | [diff] [blame] | 1044 | ieee80211_flush_queues(local, NULL, false); |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1045 | *next_delay = 0; |
| 1046 | } else |
| 1047 | *next_delay = HZ / 10; |
| 1048 | |
| 1049 | /* remember when we left the operating channel */ |
| 1050 | local->leave_oper_channel_time = jiffies; |
| 1051 | |
| 1052 | /* advance to the next channel to be scanned */ |
Mohammed Shafi Shajakhan | de2ee84 | 2011-12-24 18:43:28 +0530 | [diff] [blame] | 1053 | local->next_scan_state = SCAN_SET_CHANNEL; |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1054 | } |
| 1055 | |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 1056 | void ieee80211_scan_work(struct wiphy *wiphy, struct wiphy_work *work) |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1057 | { |
| 1058 | struct ieee80211_local *local = |
| 1059 | container_of(work, struct ieee80211_local, scan_work.work); |
Johannes Berg | d07bfd8 | 2011-03-07 15:48:41 +0100 | [diff] [blame] | 1060 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1061 | struct cfg80211_scan_request *scan_req; |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1062 | unsigned long next_delay = 0; |
Eliad Peller | 8bd2a24 | 2013-12-05 11:21:27 +0200 | [diff] [blame] | 1063 | bool aborted; |
Johannes Berg | 8789d45 | 2010-08-26 13:30:26 +0200 | [diff] [blame] | 1064 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1065 | lockdep_assert_wiphy(local->hw.wiphy); |
Stanislaw Gruszka | 259b62e | 2010-10-06 11:22:08 +0200 | [diff] [blame] | 1066 | |
Luciano Coelho | 332ff7f | 2015-01-22 23:34:10 +0200 | [diff] [blame] | 1067 | if (!ieee80211_can_run_worker(local)) { |
| 1068 | aborted = true; |
| 1069 | goto out_complete; |
| 1070 | } |
| 1071 | |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 1072 | sdata = rcu_dereference_protected(local->scan_sdata, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1073 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1074 | scan_req = rcu_dereference_protected(local->scan_req, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1075 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Johannes Berg | d07bfd8 | 2011-03-07 15:48:41 +0100 | [diff] [blame] | 1076 | |
Ben Greear | 8a69067 | 2012-04-17 10:54:16 -0700 | [diff] [blame] | 1077 | /* When scanning on-channel, the first-callback means completed. */ |
| 1078 | if (test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) { |
| 1079 | aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); |
| 1080 | goto out_complete; |
| 1081 | } |
| 1082 | |
Stanislaw Gruszka | 259b62e | 2010-10-06 11:22:08 +0200 | [diff] [blame] | 1083 | if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) { |
| 1084 | aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); |
| 1085 | goto out_complete; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1086 | } |
| 1087 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1088 | if (!sdata || !scan_req) |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1089 | return; |
Stanislaw Gruszka | 259b62e | 2010-10-06 11:22:08 +0200 | [diff] [blame] | 1090 | |
Eliad Peller | ff5db43 | 2014-11-12 10:08:29 +0200 | [diff] [blame] | 1091 | if (!local->scanning) { |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1092 | int rc; |
| 1093 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1094 | RCU_INIT_POINTER(local->scan_req, NULL); |
Monam Agarwal | 0c2bef46 | 2014-03-24 00:51:43 +0530 | [diff] [blame] | 1095 | RCU_INIT_POINTER(local->scan_sdata, NULL); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1096 | |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1097 | rc = __ieee80211_start_scan(sdata, scan_req); |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1098 | if (!rc) |
| 1099 | return; |
| 1100 | /* need to complete scan in cfg80211 */ |
| 1101 | rcu_assign_pointer(local->scan_req, scan_req); |
| 1102 | aborted = true; |
| 1103 | goto out_complete; |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1104 | } |
| 1105 | |
Felix Fietkau | b041b7b | 2022-04-20 12:49:07 +0200 | [diff] [blame] | 1106 | clear_bit(SCAN_BEACON_WAIT, &local->scanning); |
| 1107 | |
Johannes Berg | 5bc7572 | 2008-09-11 00:01:51 +0200 | [diff] [blame] | 1108 | /* |
Helmut Schaa | f502d09 | 2009-07-23 12:13:48 +0200 | [diff] [blame] | 1109 | * as long as no delay is required advance immediately |
| 1110 | * without scheduling a new work |
| 1111 | */ |
| 1112 | do { |
Rajkumar Manoharan | c29acf2 | 2011-05-14 09:43:28 +0530 | [diff] [blame] | 1113 | if (!ieee80211_sdata_running(sdata)) { |
| 1114 | aborted = true; |
| 1115 | goto out_complete; |
| 1116 | } |
| 1117 | |
Felix Fietkau | b041b7b | 2022-04-20 12:49:07 +0200 | [diff] [blame] | 1118 | if (test_and_clear_bit(SCAN_BEACON_DONE, &local->scanning) && |
| 1119 | local->next_scan_state == SCAN_DECISION) |
| 1120 | local->next_scan_state = SCAN_SEND_PROBE; |
| 1121 | |
Helmut Schaa | 977923b | 2009-07-23 12:14:20 +0200 | [diff] [blame] | 1122 | switch (local->next_scan_state) { |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 1123 | case SCAN_DECISION: |
Stanislaw Gruszka | e229f84 | 2010-10-06 11:22:09 +0200 | [diff] [blame] | 1124 | /* if no more bands/channels left, complete scan */ |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1125 | if (local->scan_channel_idx >= scan_req->n_channels) { |
Stanislaw Gruszka | e229f84 | 2010-10-06 11:22:09 +0200 | [diff] [blame] | 1126 | aborted = false; |
| 1127 | goto out_complete; |
| 1128 | } |
| 1129 | ieee80211_scan_state_decision(local, &next_delay); |
Helmut Schaa | f502d09 | 2009-07-23 12:13:48 +0200 | [diff] [blame] | 1130 | break; |
Helmut Schaa | 2fb3f02 | 2009-07-23 12:13:56 +0200 | [diff] [blame] | 1131 | case SCAN_SET_CHANNEL: |
| 1132 | ieee80211_scan_state_set_channel(local, &next_delay); |
| 1133 | break; |
Helmut Schaa | f502d09 | 2009-07-23 12:13:48 +0200 | [diff] [blame] | 1134 | case SCAN_SEND_PROBE: |
| 1135 | ieee80211_scan_state_send_probe(local, &next_delay); |
| 1136 | break; |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1137 | case SCAN_SUSPEND: |
| 1138 | ieee80211_scan_state_suspend(local, &next_delay); |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 1139 | break; |
Johannes Berg | 07ef03e | 2011-11-08 16:21:21 +0100 | [diff] [blame] | 1140 | case SCAN_RESUME: |
| 1141 | ieee80211_scan_state_resume(local, &next_delay); |
Helmut Schaa | 142b9f5 | 2009-07-23 13:18:01 +0200 | [diff] [blame] | 1142 | break; |
Sam Leffler | cd2bb51 | 2012-10-11 21:03:35 -0700 | [diff] [blame] | 1143 | case SCAN_ABORT: |
| 1144 | aborted = true; |
| 1145 | goto out_complete; |
Helmut Schaa | f502d09 | 2009-07-23 12:13:48 +0200 | [diff] [blame] | 1146 | } |
| 1147 | } while (next_delay == 0); |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1148 | |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 1149 | wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, |
| 1150 | next_delay); |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1151 | return; |
Stanislaw Gruszka | 259b62e | 2010-10-06 11:22:08 +0200 | [diff] [blame] | 1152 | |
| 1153 | out_complete: |
Eliad Peller | 8bd2a24 | 2013-12-05 11:21:27 +0200 | [diff] [blame] | 1154 | __ieee80211_scan_completed(&local->hw, aborted); |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1155 | } |
| 1156 | |
Johannes Berg | c2b1345 | 2008-09-11 00:01:55 +0200 | [diff] [blame] | 1157 | int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1158 | struct cfg80211_scan_request *req) |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1159 | { |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1160 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1161 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1162 | return __ieee80211_start_scan(sdata, req); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1163 | } |
| 1164 | |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1165 | int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata, |
| 1166 | const u8 *ssid, u8 ssid_len, |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1167 | struct ieee80211_channel **channels, |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 1168 | unsigned int n_channels) |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1169 | { |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1170 | struct ieee80211_local *local = sdata->local; |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1171 | int ret = -EBUSY, i, n_ch = 0; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 1172 | enum nl80211_band band; |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1173 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1174 | lockdep_assert_wiphy(local->hw.wiphy); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1175 | |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1176 | /* busy scanning */ |
| 1177 | if (local->scan_req) |
| 1178 | goto unlock; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1179 | |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 1180 | /* fill internal scan request */ |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1181 | if (!channels) { |
| 1182 | int max_n; |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 1183 | |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 1184 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
Tova Mussai | c8cb5b8 | 2020-09-18 11:33:13 +0200 | [diff] [blame] | 1185 | if (!local->hw.wiphy->bands[band] || |
| 1186 | band == NL80211_BAND_6GHZ) |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 1187 | continue; |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1188 | |
| 1189 | max_n = local->hw.wiphy->bands[band]->n_channels; |
| 1190 | for (i = 0; i < max_n; i++) { |
| 1191 | struct ieee80211_channel *tmp_ch = |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 1192 | &local->hw.wiphy->bands[band]->channels[i]; |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1193 | |
Luis R. Rodriguez | 8fe02e1 | 2013-10-21 19:22:25 +0200 | [diff] [blame] | 1194 | if (tmp_ch->flags & (IEEE80211_CHAN_NO_IR | |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1195 | IEEE80211_CHAN_DISABLED)) |
| 1196 | continue; |
| 1197 | |
| 1198 | local->int_scan_req->channels[n_ch] = tmp_ch; |
| 1199 | n_ch++; |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 1200 | } |
| 1201 | } |
| 1202 | |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1203 | if (WARN_ON_ONCE(n_ch == 0)) |
| 1204 | goto unlock; |
| 1205 | |
| 1206 | local->int_scan_req->n_channels = n_ch; |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 1207 | } else { |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1208 | for (i = 0; i < n_channels; i++) { |
| 1209 | if (channels[i]->flags & (IEEE80211_CHAN_NO_IR | |
| 1210 | IEEE80211_CHAN_DISABLED)) |
| 1211 | continue; |
| 1212 | |
| 1213 | local->int_scan_req->channels[n_ch] = channels[i]; |
| 1214 | n_ch++; |
| 1215 | } |
| 1216 | |
| 1217 | if (WARN_ON_ONCE(n_ch == 0)) |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1218 | goto unlock; |
| 1219 | |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1220 | local->int_scan_req->n_channels = n_ch; |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 1221 | } |
| 1222 | |
| 1223 | local->int_scan_req->ssids = &local->scan_ssid; |
| 1224 | local->int_scan_req->n_ssids = 1; |
Johannes Berg | 5ba6353 | 2009-08-07 17:54:07 +0200 | [diff] [blame] | 1225 | memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN); |
| 1226 | local->int_scan_req->ssids[0].ssid_len = ssid_len; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1227 | |
Johannes Berg | 5ba6353 | 2009-08-07 17:54:07 +0200 | [diff] [blame] | 1228 | ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req); |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1229 | unlock: |
Johannes Berg | f3b85252 | 2009-04-23 16:01:47 +0200 | [diff] [blame] | 1230 | return ret; |
Johannes Berg | 0a51b27 | 2008-09-08 17:44:25 +0200 | [diff] [blame] | 1231 | } |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1232 | |
| 1233 | void ieee80211_scan_cancel(struct ieee80211_local *local) |
| 1234 | { |
Johannes Berg | 0fd3af6 | 2023-03-01 12:09:14 +0200 | [diff] [blame] | 1235 | /* ensure a new scan cannot be queued */ |
| 1236 | lockdep_assert_wiphy(local->hw.wiphy); |
| 1237 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1238 | /* |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1239 | * We are canceling software scan, or deferred scan that was not |
Stanislaw Gruszka | 4136c42 | 2010-10-06 11:22:10 +0200 | [diff] [blame] | 1240 | * yet really started (see __ieee80211_start_scan ). |
| 1241 | * |
| 1242 | * Regarding hardware scan: |
| 1243 | * - we can not call __ieee80211_scan_completed() as when |
| 1244 | * SCAN_HW_SCANNING bit is set this function change |
| 1245 | * local->hw_scan_req to operate on 5G band, what race with |
| 1246 | * driver which can use local->hw_scan_req |
| 1247 | * |
| 1248 | * - we can not cancel scan_work since driver can schedule it |
| 1249 | * by ieee80211_scan_completed(..., true) to finish scan |
| 1250 | * |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1251 | * Hence we only call the cancel_hw_scan() callback, but the low-level |
| 1252 | * driver is still responsible for calling ieee80211_scan_completed() |
| 1253 | * after the scan was completed/aborted. |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1254 | */ |
Stanislaw Gruszka | 4136c42 | 2010-10-06 11:22:10 +0200 | [diff] [blame] | 1255 | |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1256 | if (!local->scan_req) |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1257 | return; |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1258 | |
Emmanuel Grumbach | a754055 | 2013-09-16 11:12:07 +0300 | [diff] [blame] | 1259 | /* |
| 1260 | * We have a scan running and the driver already reported completion, |
| 1261 | * but the worker hasn't run yet or is stuck on the mutex - mark it as |
| 1262 | * cancelled. |
| 1263 | */ |
| 1264 | if (test_bit(SCAN_HW_SCANNING, &local->scanning) && |
| 1265 | test_bit(SCAN_COMPLETED, &local->scanning)) { |
| 1266 | set_bit(SCAN_HW_CANCELLED, &local->scanning); |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1267 | return; |
Emmanuel Grumbach | a754055 | 2013-09-16 11:12:07 +0300 | [diff] [blame] | 1268 | } |
| 1269 | |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1270 | if (test_bit(SCAN_HW_SCANNING, &local->scanning)) { |
Emmanuel Grumbach | a754055 | 2013-09-16 11:12:07 +0300 | [diff] [blame] | 1271 | /* |
| 1272 | * Make sure that __ieee80211_scan_completed doesn't trigger a |
| 1273 | * scan on another band. |
| 1274 | */ |
| 1275 | set_bit(SCAN_HW_CANCELLED, &local->scanning); |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1276 | if (local->ops->cancel_hw_scan) |
Johannes Berg | e2fd5db | 2012-07-06 21:39:28 +0200 | [diff] [blame] | 1277 | drv_cancel_hw_scan(local, |
| 1278 | rcu_dereference_protected(local->scan_sdata, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1279 | lockdep_is_held(&local->hw.wiphy->mtx))); |
| 1280 | return; |
Stanislaw Gruszka | 4136c42 | 2010-10-06 11:22:10 +0200 | [diff] [blame] | 1281 | } |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1282 | |
Johannes Berg | 2017125 | 2023-08-28 13:59:39 +0200 | [diff] [blame] | 1283 | wiphy_delayed_work_cancel(local->hw.wiphy, &local->scan_work); |
Eliad Peller | b856439 | 2011-06-13 12:47:30 +0300 | [diff] [blame] | 1284 | /* and clean up */ |
Avraham Stern | 7947d3e | 2016-07-05 15:23:12 +0300 | [diff] [blame] | 1285 | memset(&local->scan_info, 0, sizeof(local->scan_info)); |
Eliad Peller | 8bd2a24 | 2013-12-05 11:21:27 +0200 | [diff] [blame] | 1286 | __ieee80211_scan_completed(&local->hw, true); |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 1287 | } |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1288 | |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1289 | int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, |
| 1290 | struct cfg80211_sched_scan_request *req) |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1291 | { |
| 1292 | struct ieee80211_local *local = sdata->local; |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1293 | struct ieee80211_scan_ies sched_scan_ies = {}; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1294 | struct cfg80211_chan_def chandef; |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1295 | int ret, i, iebufsz, num_bands = 0; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 1296 | u32 rate_masks[NUM_NL80211_BANDS] = {}; |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1297 | u8 bands_used = 0; |
| 1298 | u8 *ie; |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 1299 | u32 flags = 0; |
Johannes Berg | c604b9f | 2012-11-29 12:45:18 +0100 | [diff] [blame] | 1300 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1301 | lockdep_assert_wiphy(local->hw.wiphy); |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1302 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1303 | iebufsz = local->scan_ies_len + req->ie_len; |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1304 | |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1305 | if (!local->ops->sched_scan_start) |
Andrei Otcheretianski | 0528e0f | 2023-12-11 09:05:25 +0200 | [diff] [blame] | 1306 | return -EOPNOTSUPP; |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1307 | |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 1308 | for (i = 0; i < NUM_NL80211_BANDS; i++) { |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1309 | if (local->hw.wiphy->bands[i]) { |
| 1310 | bands_used |= BIT(i); |
| 1311 | rate_masks[i] = (u32) -1; |
| 1312 | num_bands++; |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1313 | } |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1314 | } |
| 1315 | |
Johannes Berg | b9771d4 | 2018-05-28 15:47:41 +0200 | [diff] [blame] | 1316 | if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) |
| 1317 | flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; |
| 1318 | |
Kees Cook | 6396bb2 | 2018-06-12 14:03:40 -0700 | [diff] [blame] | 1319 | ie = kcalloc(iebufsz, num_bands, GFP_KERNEL); |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1320 | if (!ie) { |
| 1321 | ret = -ENOMEM; |
| 1322 | goto out; |
| 1323 | } |
| 1324 | |
Johannes Berg | 5add321 | 2023-08-29 12:17:43 +0200 | [diff] [blame] | 1325 | ieee80211_prepare_scan_chandef(&chandef); |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1326 | |
Johannes Berg | 07095d1 | 2024-01-29 20:19:33 +0100 | [diff] [blame] | 1327 | ret = ieee80211_build_preq_ies(sdata, ie, num_bands * iebufsz, |
| 1328 | &sched_scan_ies, req->ie, |
| 1329 | req->ie_len, bands_used, rate_masks, |
| 1330 | &chandef, flags); |
| 1331 | if (ret < 0) |
| 1332 | goto error; |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1333 | |
Johannes Berg | 30dd3ed | 2012-09-04 19:15:01 +0200 | [diff] [blame] | 1334 | ret = drv_sched_scan_start(local, sdata, req, &sched_scan_ies); |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1335 | if (ret == 0) { |
Johannes Berg | 5260a5b | 2012-07-06 21:55:11 +0200 | [diff] [blame] | 1336 | rcu_assign_pointer(local->sched_scan_sdata, sdata); |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1337 | rcu_assign_pointer(local->sched_scan_req, req); |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1338 | } |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1339 | |
Johannes Berg | 07095d1 | 2024-01-29 20:19:33 +0100 | [diff] [blame] | 1340 | error: |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1341 | kfree(ie); |
David Spinadel | 633e271 | 2014-02-06 16:15:23 +0200 | [diff] [blame] | 1342 | out: |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1343 | if (ret) { |
| 1344 | /* Clean in case of failure after HW restart or upon resume. */ |
Monam Agarwal | 0c2bef46 | 2014-03-24 00:51:43 +0530 | [diff] [blame] | 1345 | RCU_INIT_POINTER(local->sched_scan_sdata, NULL); |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1346 | RCU_INIT_POINTER(local->sched_scan_req, NULL); |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1347 | } |
| 1348 | |
| 1349 | return ret; |
| 1350 | } |
| 1351 | |
| 1352 | int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, |
| 1353 | struct cfg80211_sched_scan_request *req) |
| 1354 | { |
| 1355 | struct ieee80211_local *local = sdata->local; |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1356 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1357 | lockdep_assert_wiphy(local->hw.wiphy); |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1358 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1359 | if (rcu_access_pointer(local->sched_scan_sdata)) |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1360 | return -EBUSY; |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1361 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1362 | return __ieee80211_request_sched_scan_start(sdata, req); |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1363 | } |
| 1364 | |
Eliad Peller | 0d440ea | 2015-10-25 10:59:33 +0200 | [diff] [blame] | 1365 | int ieee80211_request_sched_scan_stop(struct ieee80211_local *local) |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1366 | { |
Eliad Peller | 0d440ea | 2015-10-25 10:59:33 +0200 | [diff] [blame] | 1367 | struct ieee80211_sub_if_data *sched_scan_sdata; |
| 1368 | int ret = -ENOENT; |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1369 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1370 | lockdep_assert_wiphy(local->hw.wiphy); |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1371 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1372 | if (!local->ops->sched_scan_stop) |
Andrei Otcheretianski | 0528e0f | 2023-12-11 09:05:25 +0200 | [diff] [blame] | 1373 | return -EOPNOTSUPP; |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1374 | |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1375 | /* We don't want to restart sched scan anymore. */ |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1376 | RCU_INIT_POINTER(local->sched_scan_req, NULL); |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1377 | |
Eliad Peller | 0d440ea | 2015-10-25 10:59:33 +0200 | [diff] [blame] | 1378 | sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1379 | lockdep_is_held(&local->hw.wiphy->mtx)); |
Eliad Peller | 0d440ea | 2015-10-25 10:59:33 +0200 | [diff] [blame] | 1380 | if (sched_scan_sdata) { |
| 1381 | ret = drv_sched_scan_stop(local, sched_scan_sdata); |
Alexander Bondar | 71228a1 | 2014-03-16 10:49:54 +0200 | [diff] [blame] | 1382 | if (!ret) |
Andreea-Cristina Bernat | ad053a96 | 2014-08-22 16:14:49 +0300 | [diff] [blame] | 1383 | RCU_INIT_POINTER(local->sched_scan_sdata, NULL); |
Alexander Bondar | 71228a1 | 2014-03-16 10:49:54 +0200 | [diff] [blame] | 1384 | } |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1385 | |
| 1386 | return ret; |
| 1387 | } |
| 1388 | |
| 1389 | void ieee80211_sched_scan_results(struct ieee80211_hw *hw) |
| 1390 | { |
| 1391 | struct ieee80211_local *local = hw_to_local(hw); |
| 1392 | |
| 1393 | trace_api_sched_scan_results(local); |
| 1394 | |
Arend Van Spriel | b34939b | 2017-04-28 13:40:28 +0100 | [diff] [blame] | 1395 | cfg80211_sched_scan_results(hw->wiphy, 0); |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1396 | } |
| 1397 | EXPORT_SYMBOL(ieee80211_sched_scan_results); |
| 1398 | |
Johannes Berg | f6837ba8 | 2014-04-30 14:19:04 +0200 | [diff] [blame] | 1399 | void ieee80211_sched_scan_end(struct ieee80211_local *local) |
Luciano Coelho | 85a9994 | 2011-05-12 16:28:29 +0300 | [diff] [blame] | 1400 | { |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1401 | lockdep_assert_wiphy(local->hw.wiphy); |
Luciano Coelho | 85a9994 | 2011-05-12 16:28:29 +0300 | [diff] [blame] | 1402 | |
Johannes Berg | 0cd8080 | 2023-08-28 14:00:05 +0200 | [diff] [blame] | 1403 | if (!rcu_access_pointer(local->sched_scan_sdata)) |
Luciano Coelho | 85a9994 | 2011-05-12 16:28:29 +0300 | [diff] [blame] | 1404 | return; |
Luciano Coelho | 85a9994 | 2011-05-12 16:28:29 +0300 | [diff] [blame] | 1405 | |
Monam Agarwal | 0c2bef46 | 2014-03-24 00:51:43 +0530 | [diff] [blame] | 1406 | RCU_INIT_POINTER(local->sched_scan_sdata, NULL); |
Luciano Coelho | 85a9994 | 2011-05-12 16:28:29 +0300 | [diff] [blame] | 1407 | |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1408 | /* If sched scan was aborted by the driver. */ |
Johannes Berg | 6ea0a69 | 2014-11-19 11:55:49 +0100 | [diff] [blame] | 1409 | RCU_INIT_POINTER(local->sched_scan_req, NULL); |
David Spinadel | d43c6b6 | 2013-12-08 21:48:57 +0200 | [diff] [blame] | 1410 | |
Johannes Berg | eadfb54 | 2023-08-28 13:59:45 +0200 | [diff] [blame] | 1411 | cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); |
Luciano Coelho | 85a9994 | 2011-05-12 16:28:29 +0300 | [diff] [blame] | 1412 | } |
| 1413 | |
Johannes Berg | eadfb54 | 2023-08-28 13:59:45 +0200 | [diff] [blame] | 1414 | void ieee80211_sched_scan_stopped_work(struct wiphy *wiphy, |
| 1415 | struct wiphy_work *work) |
Johannes Berg | f6837ba8 | 2014-04-30 14:19:04 +0200 | [diff] [blame] | 1416 | { |
| 1417 | struct ieee80211_local *local = |
| 1418 | container_of(work, struct ieee80211_local, |
| 1419 | sched_scan_stopped_work); |
| 1420 | |
| 1421 | ieee80211_sched_scan_end(local); |
| 1422 | } |
| 1423 | |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1424 | void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) |
| 1425 | { |
| 1426 | struct ieee80211_local *local = hw_to_local(hw); |
| 1427 | |
| 1428 | trace_api_sched_scan_stopped(local); |
| 1429 | |
Eliad Peller | 2bc533b | 2016-01-05 16:28:06 +0200 | [diff] [blame] | 1430 | /* |
| 1431 | * this shouldn't really happen, so for simplicity |
| 1432 | * simply ignore it, and let mac80211 reconfigure |
| 1433 | * the sched scan later on. |
| 1434 | */ |
| 1435 | if (local->in_reconfig) |
| 1436 | return; |
| 1437 | |
Johannes Berg | eadfb54 | 2023-08-28 13:59:45 +0200 | [diff] [blame] | 1438 | wiphy_work_queue(hw->wiphy, &local->sched_scan_stopped_work); |
Luciano Coelho | 79f460c | 2011-05-11 17:09:36 +0300 | [diff] [blame] | 1439 | } |
| 1440 | EXPORT_SYMBOL(ieee80211_sched_scan_stopped); |