scan.c revision b856439b1b54358e580aaee5dbe683af5ada9403
10a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg/* 25484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg * Scanning implementation 35484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg * 40a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> 50a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2004, Instant802 Networks, Inc. 60a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2005, Devicescape Software, Inc. 70a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 80a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 90a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * 100a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * This program is free software; you can redistribute it and/or modify 110a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * it under the terms of the GNU General Public License version 2 as 120a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg * published by the Free Software Foundation. 130a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg */ 140a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 150a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include <linux/if_arp.h> 16078e1e60dd6c6b0d4bc8d58ccb80c008e8efc9ffJohannes Berg#include <linux/rtnetlink.h> 17df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa#include <linux/pm_qos_params.h> 18df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa#include <net/sch_generic.h> 195a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 200a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include <net/mac80211.h> 210a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 220a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include "ieee80211_i.h" 232448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg#include "driver-ops.h" 245484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg#include "mesh.h" 250a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 260a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_PROBE_DELAY (HZ / 33) 270a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_CHANNEL_TIME (HZ / 33) 2896f7e73938da744e718ce4817dd3e7e424624654Helmut Schaa#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 8) 290a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 30c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergstruct ieee80211_bss * 315484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, 325484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg u8 *ssid, u8 ssid_len) 335484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 340c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 350c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 360c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, 370c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ieee80211_get_channel(local->hw.wiphy, freq), 380c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bssid, ssid, ssid_len, 0, 0); 390c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!cbss) 400c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return NULL; 410c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return (void *)cbss->priv; 425484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 435484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 4400d3f14cf9f12c21428121026a5e1d5f65926447Johannes Bergstatic void ieee80211_rx_bss_free(struct cfg80211_bss *cbss) 455484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 460c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss = (void *)cbss->priv; 475484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 485484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg kfree(bss_mesh_id(bss)); 495484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg kfree(bss_mesh_cfg(bss)); 505484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 515484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 525484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergvoid ieee80211_rx_bss_put(struct ieee80211_local *local, 53c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss) 545484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 550c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!bss) 560c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return; 570c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cfg80211_put_bss(container_of((void *)bss, struct cfg80211_bss, priv)); 585484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 595484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 60ab13315af97919fae0e014748105fdc2e30afb2dKalle Valostatic bool is_uapsd_supported(struct ieee802_11_elems *elems) 61ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo{ 62ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo u8 qos_info; 63ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 64ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo if (elems->wmm_info && elems->wmm_info_len == 7 65ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_info[5] == 1) 66ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_info[6]; 67ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else if (elems->wmm_param && elems->wmm_param_len == 24 68ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_param[5] == 1) 69ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_param[6]; 70ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else 71ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo /* no valid wmm information or parameter element found */ 72ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return false; 73ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 74ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD; 75ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo} 76ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 77c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergstruct ieee80211_bss * 785484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergieee80211_bss_info_update(struct ieee80211_local *local, 795484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_rx_status *rx_status, 805484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_mgmt *mgmt, 815484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg size_t len, 825484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee802_11_elems *elems, 832a5193119269062608582418deba7af82844159aJohannes Berg struct ieee80211_channel *channel, 842a5193119269062608582418deba7af82844159aJohannes Berg bool beacon) 855484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 860c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 87c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 88f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka int clen, srlen; 892a5193119269062608582418deba7af82844159aJohannes Berg s32 signal = 0; 902a5193119269062608582418deba7af82844159aJohannes Berg 9177965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 922a5193119269062608582418deba7af82844159aJohannes Berg signal = rx_status->signal * 100; 9377965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 942a5193119269062608582418deba7af82844159aJohannes Berg signal = (rx_status->signal * 100) / local->hw.max_signal; 952a5193119269062608582418deba7af82844159aJohannes Berg 960c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_inform_bss_frame(local->hw.wiphy, channel, 970c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg mgmt, len, signal, GFP_ATOMIC); 985484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 990c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!cbss) 10000d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg return NULL; 10100d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg 1020c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->free_priv = ieee80211_rx_bss_free; 1030c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 1045484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1055484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg /* save the ERP value so that it is available at association time */ 1065484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->erp_info && elems->erp_info_len >= 1) { 1075484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->erp_value = elems->erp_info[0]; 1085484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->has_erp_value = 1; 1095484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1105484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1115484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->tim) { 1125484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_tim_ie *tim_ie = 1135484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg (struct ieee80211_tim_ie *)elems->tim; 1145484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->dtim_period = tim_ie->dtim_period; 1155484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1165484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 117e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg /* If the beacon had no TIM IE, or it was invalid, use 1 */ 118e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg if (beacon && !bss->dtim_period) 119e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg bss->dtim_period = 1; 120e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg 121f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka /* replace old supported rates if we get new values */ 122f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka srlen = 0; 1235484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->supp_rates) { 124f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka clen = IEEE80211_MAX_SUPP_RATES; 1255484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (clen > elems->supp_rates_len) 1265484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg clen = elems->supp_rates_len; 127f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka memcpy(bss->supp_rates, elems->supp_rates, clen); 128f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka srlen += clen; 1295484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1305484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->ext_supp_rates) { 131f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka clen = IEEE80211_MAX_SUPP_RATES - srlen; 1325484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (clen > elems->ext_supp_rates_len) 1335484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg clen = elems->ext_supp_rates_len; 134f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, clen); 135f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka srlen += clen; 1365484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 137f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka if (srlen) 138f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka bss->supp_rates_len = srlen; 1395484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1405484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->wmm_used = elems->wmm_param || elems->wmm_info; 141ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo bss->uapsd_supported = is_uapsd_supported(elems); 1425484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1435484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (!beacon) 1445484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->last_probe_resp = jiffies; 1455484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1465484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg return bss; 1475484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 1480a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 14998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Bergieee80211_rx_result 150f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Bergieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 15198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg{ 152f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 15398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee80211_mgmt *mgmt; 154c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 15598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg u8 *elements; 15698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee80211_channel *channel; 15798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg size_t baselen; 15898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg int freq; 15998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg __le16 fc; 16098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg bool presp, beacon = false; 16198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee802_11_elems elems; 16298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 16398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (skb->len < 2) 16498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_UNUSABLE; 16598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 16698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 16798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg fc = mgmt->frame_control; 16898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 16998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (ieee80211_is_ctl(fc)) 17098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_CONTINUE; 17198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 17298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (skb->len < 24) 173306fe9384f06d31219778cece2d3c646146e7bb6Luciano Coelho return RX_CONTINUE; 17498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 17598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg presp = ieee80211_is_probe_resp(fc); 17698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (presp) { 17798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg /* ignore ProbeResp to foreign address */ 17847846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) 17998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 18098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 18198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg presp = true; 18298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.probe_resp.variable; 18398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable); 18498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } else { 18598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg beacon = ieee80211_is_beacon(fc); 18698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable); 18798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.beacon.variable; 18898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } 18998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (!presp && !beacon) 19198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_CONTINUE; 19298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (baselen > skb->len) 19498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 19598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg ieee802_11_parse_elems(elements, skb->len - baselen, &elems); 19798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (elems.ds_params && elems.ds_params_len == 1) 19959eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf freq = ieee80211_channel_to_frequency(elems.ds_params[0], 20059eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf rx_status->band); 20198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg else 20298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg freq = rx_status->freq; 20398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg channel = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 20598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 20798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 20898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg bss = ieee80211_bss_info_update(sdata->local, rx_status, 21098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg mgmt, skb->len, &elems, 2112a5193119269062608582418deba7af82844159aJohannes Berg channel, beacon); 212d048e503a2b01e771ee87921c24d89d7ec3f0c2fJouni Malinen if (bss) 213d048e503a2b01e771ee87921c24d89d7ec3f0c2fJouni Malinen ieee80211_rx_bss_put(sdata->local, bss); 21498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 215b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* If we are on-operating-channel, and this packet is for the 216b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * current channel, pass the pkt on up the stack so that 217b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * the rest of the stack can make use of it. 218b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear */ 219b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear if (ieee80211_cfg_on_oper_channel(sdata->local) 220b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear && (channel == sdata->local->oper_channel)) 221b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear return RX_CONTINUE; 222b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 22398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg dev_kfree_skb(skb); 22498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_QUEUED; 22598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg} 22698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 2274d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg/* return false if no more work */ 2284d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Bergstatic bool ieee80211_prep_hw_scan(struct ieee80211_local *local) 2294d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg{ 2304d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 2314d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg enum ieee80211_band band; 2324d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg int i, ielen, n_chans; 2334d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2344d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg do { 2354d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->hw_scan_band == IEEE80211_NUM_BANDS) 2364d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return false; 2374d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2384d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg band = local->hw_scan_band; 2394d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans = 0; 2404d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg for (i = 0; i < req->n_channels; i++) { 2414d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (req->channels[i]->band == band) { 2424d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->channels[n_chans] = 2434d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->channels[i]; 2444d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans++; 2454d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2464d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2474d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2484d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band++; 2494d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } while (!n_chans); 2504d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2514d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_channels = n_chans; 2524d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2534d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->ie, 254651b52254fc061f02d965524e71de4333a009a5aJouni Malinen req->ie, req->ie_len, band, (u32) -1, 255651b52254fc061f02d965524e71de4333a009a5aJouni Malinen 0); 2564d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie_len = ielen; 2574d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2584d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return true; 2594d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg} 2604d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 261d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Bergstatic void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted, 262e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka bool was_hw_scan) 2630a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 2640a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = hw_to_local(hw); 265d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg bool on_oper_chan; 266d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg bool enable_beacons = false; 2670a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 268e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 2695bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 2706d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg /* 2716d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * It's ok to abort a not-yet-running scan (that 2726d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * we have one at all will be verified by checking 2736d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * local->scan_req next), but not to complete it 2746d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * successfully. 2756d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg */ 2766d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg if (WARN_ON(!local->scanning && !aborted)) 2776d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg aborted = true; 2785bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 279e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (WARN_ON(!local->scan_req)) 280d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 281de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 2824d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (was_hw_scan && !aborted && ieee80211_prep_hw_scan(local)) { 2836eb11a9a311a0f7e5b9b66c18f7498a26c9ec206Stanislaw Gruszka int rc = drv_hw_scan(local, local->scan_sdata, local->hw_scan_req); 2846eb11a9a311a0f7e5b9b66c18f7498a26c9ec206Stanislaw Gruszka if (rc == 0) 285d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 2864d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2874d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2884d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 2894d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 290f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 2915ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg if (local->scan_req != local->int_scan_req) 2922a5193119269062608582418deba7af82844159aJohannes Berg cfg80211_scan_done(local->scan_req, aborted); 2932a5193119269062608582418deba7af82844159aJohannes Berg local->scan_req = NULL; 29415db0b7fd872b0312033666d3a82e1214a227ec0Johannes Berg local->scan_sdata = NULL; 2952a5193119269062608582418deba7af82844159aJohannes Berg 296fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 29758905ca5b11a0ff3860f55b789cbbf052f7158a7Johannes Berg local->scan_channel = NULL; 298f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 299b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear on_oper_chan = ieee80211_cfg_on_oper_channel(local); 300b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 301d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg if (was_hw_scan || !on_oper_chan) 302b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); 303d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg else 30459bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear /* Set power back to normal operating levels. */ 30559bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear ieee80211_hw_config(local, 0); 306a0daa0e7592ada797d6835f11529097aabc27ad2Luis R. Rodriguez 307e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (!was_hw_scan) { 308b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear bool on_oper_chan2; 309e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_configure_filter(local); 310e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka drv_sw_scan_complete(local); 311b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear on_oper_chan2 = ieee80211_cfg_on_oper_channel(local); 312b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* We should always be on-channel at this point. */ 313b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear WARN_ON(!on_oper_chan2); 314b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear if (on_oper_chan2 && (on_oper_chan != on_oper_chan2)) 315b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear enable_beacons = true; 316b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 317b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear ieee80211_offchannel_return(local, enable_beacons, true); 318e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 3190a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 3205cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 321e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 3220a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg ieee80211_mlme_notify_scan_completed(local); 323469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_ibss_notify_scan_completed(local); 324472dbc45dc1966284de72d7de15690c17ed2cf33Johannes Berg ieee80211_mesh_notify_scan_completed(local); 32581ac3462d346ee7aaf037a35156b0a7a354e98cfJohannes Berg ieee80211_queue_work(&local->hw, &local->work_work); 3260a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 3278789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3288789d459bc5e837bf37d261453df96ef54018d7bJohannes Bergvoid ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) 3298789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg{ 3308789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg struct ieee80211_local *local = hw_to_local(hw); 3318789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3328789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg trace_api_scan_completed(local, aborted); 3338789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3348789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_COMPLETED, &local->scanning); 3358789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg if (aborted) 3368789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_ABORTED, &local->scanning); 3378789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 3388789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg} 3390a51b27e956bd9580296c48191b78175ed8b5971Johannes BergEXPORT_SYMBOL(ieee80211_scan_completed); 3400a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 341f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int ieee80211_start_sw_scan(struct ieee80211_local *local) 342f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 343f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* 344f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Hardware/driver doesn't support hw_scan, so use software 345f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * scanning instead. First send a nullfunc frame with power save 346f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * bit on so that AP will buffer the frames for us while we are not 347f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * listening, then send probe requests to each channel and wait for 348f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * the responses. After all channels are scanned, tune back to the 349f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * original channel and send a nullfunc frame with power save bit 350f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * off to trigger the AP to send us all the buffered frames. 351f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * 352f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Note that while local->sw_scanning is true everything else but 353f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * nullfunc frames and probe requests will be dropped in 354f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * ieee80211_tx_h_check_assoc(). 355f3b85252f081581a8f257545ed748062dce7798bJohannes Berg */ 3562448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg drv_sw_scan_start(local); 357f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 358df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa local->leave_oper_channel_time = 0; 359977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 360f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_channel_idx = 0; 361f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 362b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* We always want to use off-channel PS, even if we 363b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * are not really leaving oper-channel. Don't 364b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * tell the AP though, as long as we are on-channel. 365b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear */ 366b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear ieee80211_offchannel_enable_all_ps(local, false); 367a80f7c0b088187c8471b441d461e937991870661Johannes Berg 3683ac64beecd27400d12cc7afb4108eef26c499f6aJohannes Berg ieee80211_configure_filter(local); 369f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 37059bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear /* We need to set power level at maximum rate for scanning. */ 37159bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear ieee80211_hw_config(local, 0); 37259bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear 37342935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, 37442935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez &local->scan_work, 37542935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez IEEE80211_CHANNEL_TIME); 376f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 377f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return 0; 378f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 379f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 380f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 381f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, 382f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 383f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 384f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct ieee80211_local *local = sdata->local; 385f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 386f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 387e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 388e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 389f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 390f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -EBUSY; 391f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 3926e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville if (!list_empty(&local->work_list)) { 3936e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* wait for the work to finish/time out */ 394c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg local->scan_req = req; 395c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg local->scan_sdata = sdata; 396c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg return 0; 397c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg } 398c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg 399f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->ops->hw_scan) { 400f3b85252f081581a8f257545ed748062dce7798bJohannes Berg u8 *ies; 401f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4024d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = kmalloc( 4034d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 4044d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]) + 4054d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2 + IEEE80211_MAX_SSID_LEN + local->scan_ies_len + 4064d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->ie_len, GFP_KERNEL); 4074d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (!local->hw_scan_req) 408f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -ENOMEM; 409f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4104d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ssids = req->ssids; 4114d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_ssids = req->n_ssids; 4124d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ies = (u8 *)local->hw_scan_req + 4134d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 4144d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]); 4154d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie = ies; 4164d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 4174d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band = 0; 4186e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 4196e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* 4206e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * After allocating local->hw_scan_req, we must 4216e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * go through until ieee80211_prep_hw_scan(), so 4226e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * anything that might be changed here and leave 4236e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * this function early must not go after this 4246e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * allocation. 4256e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville */ 426f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 427f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 428f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = req; 429f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_sdata = sdata; 430f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 431f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->ops->hw_scan) 432fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_HW_SCANNING, &local->scanning); 433f3b85252f081581a8f257545ed748062dce7798bJohannes Berg else 434fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_SW_SCANNING, &local->scanning); 4356e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 4365cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 437f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4384d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->ops->hw_scan) { 4394d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg WARN_ON(!ieee80211_prep_hw_scan(local)); 440a060bbfe4ee95d115e8f9705a66894ac34e2c475Johannes Berg rc = drv_hw_scan(local, sdata, local->hw_scan_req); 4414d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } else 442f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = ieee80211_start_sw_scan(local); 443f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 444f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (rc) { 4454d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 4464d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 447fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 448f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4495cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 4505cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 451f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 452f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_sdata = NULL; 453f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 454f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 455f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return rc; 456f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 457f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 458df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaastatic unsigned long 459df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaaieee80211_scan_get_channel_time(struct ieee80211_channel *chan) 460df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa{ 461df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 462df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * TODO: channel switching also consumes quite some time, 463df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * add that delay as well to get a better estimation 464df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 465df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) 466df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PASSIVE_CHANNEL_TIME; 467df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME; 468df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa} 469df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 470e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszkastatic void ieee80211_scan_state_decision(struct ieee80211_local *local, 471e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka unsigned long *next_delay) 4727d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa{ 473142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa bool associated = false; 474df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool tx_empty = true; 475df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool bad_latency; 476df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool listen_int_exceeded; 477df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa unsigned long min_beacon_int = 0; 478142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa struct ieee80211_sub_if_data *sdata; 479df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa struct ieee80211_channel *next_chan; 480142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 481df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 482df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface is associated, 483df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface has pending tx frames 484df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * and grab the lowest used beacon interval 485df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 486142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_lock(&local->iflist_mtx); 487142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa list_for_each_entry(sdata, &local->interfaces, list) { 4889607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 489142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa continue; 490142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 491142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->vif.type == NL80211_IFTYPE_STATION) { 492142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->u.mgd.associated) { 493142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa associated = true; 494df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 495df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (sdata->vif.bss_conf.beacon_int < 496df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa min_beacon_int || min_beacon_int == 0) 497df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa min_beacon_int = 498df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa sdata->vif.bss_conf.beacon_int; 499df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 500df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (!qdisc_all_tx_empty(sdata->dev)) { 501df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa tx_empty = false; 502df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa break; 503df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa } 504142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 505142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 506142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 507142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_unlock(&local->iflist_mtx); 508142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 509b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear next_chan = local->scan_req->channels[local->scan_channel_idx]; 510b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 511b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear if (ieee80211_cfg_on_oper_channel(local)) { 512b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* We're currently on operating channel. */ 5134f2e9d91f84ce39698517203974ffc2bcc32a21dBen Greear if (next_chan == local->oper_channel) 514b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* We don't need to move off of operating channel. */ 515b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear local->next_scan_state = SCAN_SET_CHANNEL; 516b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear else 517b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* 518b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * We do need to leave operating channel, as next 519b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * scan is somewhere else. 520b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear */ 521b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear local->next_scan_state = SCAN_LEAVE_OPER_CHANNEL; 522b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear } else { 523142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa /* 524142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa * we're currently scanning a different channel, let's 525df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * see if we can scan another channel without interfering 526df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * with the current traffic situation. 527df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * 528df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * Since we don't know if the AP has pending frames for us 529df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * we can only check for our tx queues and use the current 530df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * pm_qos requirements for rx. Hence, if no tx traffic occurs 531df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * at all we will scan as many channels in a row as the pm_qos 532df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * latency allows us to. Additionally we also check for the 533df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * currently negotiated listen interval to prevent losing 534df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * frames unnecessarily. 535df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * 536df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * Otherwise switch back to the operating channel. 537142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa */ 538df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 539df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bad_latency = time_after(jiffies + 540df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa ieee80211_scan_get_channel_time(next_chan), 541df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa local->leave_oper_channel_time + 542f8965467f366fd18f01feafb5db10512d7b4422cLinus Torvalds usecs_to_jiffies(pm_qos_request(PM_QOS_NETWORK_LATENCY))); 543df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 544df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa listen_int_exceeded = time_after(jiffies + 545df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa ieee80211_scan_get_channel_time(next_chan), 546df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa local->leave_oper_channel_time + 547df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa usecs_to_jiffies(min_beacon_int * 1024) * 548df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa local->hw.conf.listen_interval); 549df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 550df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (associated && ( !tx_empty || bad_latency || 551df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa listen_int_exceeded)) 552977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_ENTER_OPER_CHANNEL; 553142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa else 554977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_SET_CHANNEL; 555142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 556142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 5572fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa *next_delay = 0; 5582fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa} 5592fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa 560142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaastatic void ieee80211_scan_state_leave_oper_channel(struct ieee80211_local *local, 561142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa unsigned long *next_delay) 562142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa{ 563b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* PS will already be in off-channel mode, 564b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * we do that once at the beginning of scanning. 565b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear */ 566b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear ieee80211_offchannel_stop_vifs(local, false); 567142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 568a80f7c0b088187c8471b441d461e937991870661Johannes Berg /* 569a80f7c0b088187c8471b441d461e937991870661Johannes Berg * What if the nullfunc frames didn't arrive? 570a80f7c0b088187c8471b441d461e937991870661Johannes Berg */ 571a80f7c0b088187c8471b441d461e937991870661Johannes Berg drv_flush(local, false); 572a80f7c0b088187c8471b441d461e937991870661Johannes Berg if (local->ops->flush) 573a80f7c0b088187c8471b441d461e937991870661Johannes Berg *next_delay = 0; 574a80f7c0b088187c8471b441d461e937991870661Johannes Berg else 575a80f7c0b088187c8471b441d461e937991870661Johannes Berg *next_delay = HZ / 10; 576a80f7c0b088187c8471b441d461e937991870661Johannes Berg 577df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* remember when we left the operating channel */ 578df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa local->leave_oper_channel_time = jiffies; 579df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 580142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa /* advance to the next channel to be scanned */ 581977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_SET_CHANNEL; 582142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa} 583142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 584142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaastatic void ieee80211_scan_state_enter_oper_channel(struct ieee80211_local *local, 585142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa unsigned long *next_delay) 586142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa{ 587142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa /* switch back to the operating channel */ 588142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa local->scan_channel = NULL; 589b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear if (!ieee80211_cfg_on_oper_channel(local)) 590b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); 591142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 592142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa /* 593b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * Re-enable vifs and beaconing. Leave PS 594b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * in off-channel state..will put that back 595b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear * on-channel at the end of scanning. 596142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa */ 597b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear ieee80211_offchannel_return(local, true, false); 598142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 599142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa *next_delay = HZ / 5; 600977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 601142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa} 602142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 6032fb3f028a9a46bd344329766257699b4acb36525Helmut Schaastatic void ieee80211_scan_state_set_channel(struct ieee80211_local *local, 6042fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa unsigned long *next_delay) 6052fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa{ 6062fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa int skip; 6072fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa struct ieee80211_channel *chan; 6082fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa 6097d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa skip = 0; 6107d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa chan = local->scan_req->channels[local->scan_channel_idx]; 6117d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 612584991dccfd347cd2e1675ab262998f6c335d3c0Johannes Berg local->scan_channel = chan; 613b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 614b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear /* Only call hw-config if we really need to change channels. */ 6154f2e9d91f84ce39698517203974ffc2bcc32a21dBen Greear if (chan != local->hw.conf.channel) 616b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL)) 617b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear skip = 1; 6187d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6197d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* advance state machine to next channel/band */ 6207d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_channel_idx++; 6217d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6220ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa if (skip) { 6230ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa /* if we skip this channel return to the decision state */ 6240ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa local->next_scan_state = SCAN_DECISION; 6252fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 6260ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa } 6277d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6287d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* 6297d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * Probe delay is used to update the NAV, cf. 11.1.3.2.2 6307d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * (which unfortunately doesn't say _why_ step a) is done, 6317d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * but it waits for the probe delay or until a frame is 6327d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received - and the received frame would update the NAV). 6337d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * For now, we do not support waiting until a frame is 6347d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received. 6357d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * 6367d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * In any case, it is not necessary for a passive scan. 6377d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa */ 6387d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN || 6397d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa !local->scan_req->n_ssids) { 6407d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; 641977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 6422fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 6437d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa } 6447d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6452fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa /* active scan, send probes */ 6467d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PROBE_DELAY; 647977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_SEND_PROBE; 6487d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa} 6497d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6507d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaastatic void ieee80211_scan_state_send_probe(struct ieee80211_local *local, 6517d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa unsigned long *next_delay) 6527d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa{ 6537d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa int i; 6547d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa struct ieee80211_sub_if_data *sdata = local->scan_sdata; 6557d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6567d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa for (i = 0; i < local->scan_req->n_ssids; i++) 6577d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa ieee80211_send_probe_req( 6587d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa sdata, NULL, 6597d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_req->ssids[i].ssid, 6607d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_req->ssids[i].ssid_len, 6617d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_req->ie, local->scan_req->ie_len); 6627d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6637d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* 6647d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * After sending probe requests, wait for probe responses 6657d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * on the channel. 6667d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa */ 6677d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_CHANNEL_TIME; 668977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 6697d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa} 6707d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 671c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergvoid ieee80211_scan_work(struct work_struct *work) 6720a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 6730a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = 6740a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg container_of(work, struct ieee80211_local, scan_work.work); 675d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg struct ieee80211_sub_if_data *sdata; 6760a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg unsigned long next_delay = 0; 677d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg bool aborted, hw_scan; 6780a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 679259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_lock(&local->mtx); 6808789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 681d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg sdata = local->scan_sdata; 682d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg 683259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) { 6848789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); 685259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 6868789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg } 6878789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 688259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (!sdata || !local->scan_req) 689259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 690f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 691fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa if (local->scan_req && !local->scanning) { 692f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 693f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 694f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 695f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 69615db0b7fd872b0312033666d3a82e1214a227ec0Johannes Berg local->scan_sdata = NULL; 697f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 698f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = __ieee80211_start_scan(sdata, req); 699259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (rc) { 7003aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka /* need to complete scan in cfg80211 */ 7013aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka local->scan_req = req; 702259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka aborted = true; 703259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 704259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka } else 705259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 706f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 707f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 7085bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg /* 7095bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg * Avoid re-scheduling when the sdata is going away. 7105bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg */ 7119607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) { 712259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka aborted = true; 713259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 714f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 7150a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 716f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa /* 717f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * as long as no delay is required advance immediately 718f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * without scheduling a new work 719f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa */ 720f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa do { 721c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan if (!ieee80211_sdata_running(sdata)) { 722c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan aborted = true; 723c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan goto out_complete; 724c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan } 725c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan 726977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa switch (local->next_scan_state) { 7272fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_DECISION: 728e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka /* if no more bands/channels left, complete scan */ 729e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (local->scan_channel_idx >= local->scan_req->n_channels) { 730e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka aborted = false; 731e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka goto out_complete; 732e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 733e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_scan_state_decision(local, &next_delay); 734f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 7352fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_SET_CHANNEL: 7362fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa ieee80211_scan_state_set_channel(local, &next_delay); 7372fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa break; 738f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa case SCAN_SEND_PROBE: 739f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa ieee80211_scan_state_send_probe(local, &next_delay); 740f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 741142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa case SCAN_LEAVE_OPER_CHANNEL: 742142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa ieee80211_scan_state_leave_oper_channel(local, &next_delay); 743142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 744142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa case SCAN_ENTER_OPER_CHANNEL: 745142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa ieee80211_scan_state_enter_oper_channel(local, &next_delay); 746142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 747f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } 748f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } while (next_delay == 0); 7490a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 75042935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay); 751d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg goto out; 752259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka 753259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout_complete: 754e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning); 755d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg __ieee80211_scan_completed(&local->hw, aborted, hw_scan); 756259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout: 757259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_unlock(&local->mtx); 7580a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 7590a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 760f3b85252f081581a8f257545ed748062dce7798bJohannes Bergint ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, 761f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 7620a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 763f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int res; 764de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 765a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&sdata->local->mtx); 766f3b85252f081581a8f257545ed748062dce7798bJohannes Berg res = __ieee80211_start_scan(sdata, req); 767a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&sdata->local->mtx); 7680a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 769f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return res; 7700a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 7710a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 772f3b85252f081581a8f257545ed748062dce7798bJohannes Bergint ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata, 773be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg const u8 *ssid, u8 ssid_len, 774be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg struct ieee80211_channel *chan) 7750a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 7760a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = sdata->local; 777f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int ret = -EBUSY; 778fb63bc41772259701a827e9a6117219a7393554fGertjan van Wingerde enum ieee80211_band band; 7792a5193119269062608582418deba7af82844159aJohannes Berg 780a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 7810a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 782f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* busy scanning */ 783f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 784f3b85252f081581a8f257545ed748062dce7798bJohannes Berg goto unlock; 7859116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 786be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg /* fill internal scan request */ 787be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!chan) { 788be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg int i, nchan = 0; 789be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 790be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 791be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!local->hw.wiphy->bands[band]) 792be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg continue; 793be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg for (i = 0; 794be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg i < local->hw.wiphy->bands[band]->n_channels; 795be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg i++) { 796be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->channels[nchan] = 797be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg &local->hw.wiphy->bands[band]->channels[i]; 798be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg nchan++; 799be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 800be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 801be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 802be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_channels = nchan; 803be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } else { 804be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->channels[0] = chan; 805be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_channels = 1; 806be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 807be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 808be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->ssids = &local->scan_ssid; 809be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_ssids = 1; 8105ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN); 8115ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg local->int_scan_req->ssids[0].ssid_len = ssid_len; 8129116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 8135ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req); 814f3b85252f081581a8f257545ed748062dce7798bJohannes Berg unlock: 815a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&local->mtx); 816f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return ret; 8170a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 8185bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 8194136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka/* 8204136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Only call this function when a scan can't be queued -- under RTNL. 8214136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka */ 8225bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_scan_cancel(struct ieee80211_local *local) 8235bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 8245bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg /* 825b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * We are canceling software scan, or deferred scan that was not 8264136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * yet really started (see __ieee80211_start_scan ). 8274136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 8284136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Regarding hardware scan: 8294136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not call __ieee80211_scan_completed() as when 8304136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * SCAN_HW_SCANNING bit is set this function change 8314136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * local->hw_scan_req to operate on 5G band, what race with 8324136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * driver which can use local->hw_scan_req 8334136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 8344136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not cancel scan_work since driver can schedule it 8354136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * by ieee80211_scan_completed(..., true) to finish scan 8364136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 837b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * Hence we only call the cancel_hw_scan() callback, but the low-level 838b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * driver is still responsible for calling ieee80211_scan_completed() 839b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * after the scan was completed/aborted. 8405bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg */ 8414136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka 842a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 843b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (!local->scan_req) 844b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 845b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 846b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (test_bit(SCAN_HW_SCANNING, &local->scanning)) { 847b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (local->ops->cancel_hw_scan) 848b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller drv_cancel_hw_scan(local, local->scan_sdata); 849b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 8504136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka } 851b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 852b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* 853b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * If the work is currently running, it must be blocked on 854b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * the mutex, but we'll set scan_sdata = NULL and it'll 855b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * simply exit once it acquires the mutex. 856b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller */ 857b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller cancel_delayed_work(&local->scan_work); 858b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* and clean up */ 859b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller __ieee80211_scan_completed(&local->hw, true, false); 860b856439b1b54358e580aaee5dbe683af5ada9403Eliad Pellerout: 861d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg mutex_unlock(&local->mtx); 8625bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 86379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 86479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoint ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, 86579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct cfg80211_sched_scan_request *req) 86679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 86779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 86879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho int ret, i; 86979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 87079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_lock(&sdata->local->mtx); 87179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 87279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (local->sched_scanning) { 87379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -EBUSY; 87479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 87579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 87679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 87779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->ops->sched_scan_start) { 87879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOTSUPP; 87979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 88079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 88179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 88279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 88379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.ie[i] = kzalloc(2 + 88479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho IEEE80211_MAX_SSID_LEN + 88579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->scan_ies_len, 88679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho GFP_KERNEL); 88779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->sched_scan_ies.ie[i]) { 88879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOMEM; 88979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out_free; 89079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 89179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 89279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.len[i] = 89379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ieee80211_build_preq_ies(local, 89479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.ie[i], 89579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho req->ie, req->ie_len, i, 89679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho (u32) -1, 0); 89779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 89879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 89979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = drv_sched_scan_start(local, sdata, req, 90079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho &local->sched_scan_ies); 90179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (ret == 0) { 90279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scanning = true; 90379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 90479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 90579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 90679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout_free: 90779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho while (i > 0) 90879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho kfree(local->sched_scan_ies.ie[--i]); 90979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout: 91079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_unlock(&sdata->local->mtx); 91179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 91279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 91379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 91485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhoint ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata) 91579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 91679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 91779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho int ret = 0, i; 91879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 91979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_lock(&sdata->local->mtx); 92079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 92179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->ops->sched_scan_stop) { 92279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOTSUPP; 92379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 92479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 92579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 92679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (local->sched_scanning) { 92779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) 92879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho kfree(local->sched_scan_ies.ie[i]); 92979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 93085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho drv_sched_scan_stop(local, sdata); 93179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scanning = false; 93279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 93379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout: 93479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_unlock(&sdata->local->mtx); 93579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 93679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 93779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 93879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 93979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_results(struct ieee80211_hw *hw) 94079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 94179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 94279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 94379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_results(local); 94479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 94579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho cfg80211_sched_scan_results(hw->wiphy); 94679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 94779f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_results); 94879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 94985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhovoid ieee80211_sched_scan_stopped_work(struct work_struct *work) 95085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho{ 95185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho struct ieee80211_local *local = 95285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho container_of(work, struct ieee80211_local, 95385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho sched_scan_stopped_work); 95485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho int i; 95585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 95685a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_lock(&local->mtx); 95785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 95885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho if (!local->sched_scanning) { 95985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 96085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho return; 96185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho } 96285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 96385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) 96485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho kfree(local->sched_scan_ies.ie[i]); 96585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 96685a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho local->sched_scanning = false; 96785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 96885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 96985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 97085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho cfg80211_sched_scan_stopped(local->hw.wiphy); 97185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho} 97285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 97379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) 97479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 97579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 97679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 97779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_stopped(local); 97879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 97985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho ieee80211_queue_work(&local->hw, &local->sched_scan_stopped_work); 98079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 98179f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_stopped); 982