scan.c revision de2ee84db6a0201278e35590821cd014cb71830a
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> 17e8db0be1245de16a6cc6365506abc392c3c212d4Jean Pihet#include <linux/pm_qos.h> 18df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa#include <net/sch_generic.h> 195a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 20bc3b2d7fb9b014d75ebb79ba371a763dbab5e8cfPaul Gortmaker#include <linux/export.h> 210a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include <net/mac80211.h> 220a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 230a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include "ieee80211_i.h" 242448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg#include "driver-ops.h" 255484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg#include "mesh.h" 260a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 270a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_PROBE_DELAY (HZ / 33) 280a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_CHANNEL_TIME (HZ / 33) 2996f7e73938da744e718ce4817dd3e7e424624654Helmut Schaa#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 8) 300a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 31c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergstruct ieee80211_bss * 325484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, 335484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg u8 *ssid, u8 ssid_len) 345484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 350c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 360c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 370c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, 380c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ieee80211_get_channel(local->hw.wiphy, freq), 390c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bssid, ssid, ssid_len, 0, 0); 400c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!cbss) 410c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return NULL; 420c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return (void *)cbss->priv; 435484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 445484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 4500d3f14cf9f12c21428121026a5e1d5f65926447Johannes Bergstatic void ieee80211_rx_bss_free(struct cfg80211_bss *cbss) 465484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 470c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss = (void *)cbss->priv; 485484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 495484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg kfree(bss_mesh_id(bss)); 505484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg kfree(bss_mesh_cfg(bss)); 515484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 525484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 535484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergvoid ieee80211_rx_bss_put(struct ieee80211_local *local, 54c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss) 555484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 560c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!bss) 570c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return; 580c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cfg80211_put_bss(container_of((void *)bss, struct cfg80211_bss, priv)); 595484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 605484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 61ab13315af97919fae0e014748105fdc2e30afb2dKalle Valostatic bool is_uapsd_supported(struct ieee802_11_elems *elems) 62ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo{ 63ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo u8 qos_info; 64ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 65ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo if (elems->wmm_info && elems->wmm_info_len == 7 66ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_info[5] == 1) 67ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_info[6]; 68ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else if (elems->wmm_param && elems->wmm_param_len == 24 69ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_param[5] == 1) 70ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_param[6]; 71ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else 72ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo /* no valid wmm information or parameter element found */ 73ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return false; 74ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 75ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD; 76ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo} 77ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 78c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergstruct ieee80211_bss * 795484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergieee80211_bss_info_update(struct ieee80211_local *local, 805484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_rx_status *rx_status, 815484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_mgmt *mgmt, 825484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg size_t len, 835484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee802_11_elems *elems, 842a5193119269062608582418deba7af82844159aJohannes Berg struct ieee80211_channel *channel, 852a5193119269062608582418deba7af82844159aJohannes Berg bool beacon) 865484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 870c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 88c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 89f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka int clen, srlen; 902a5193119269062608582418deba7af82844159aJohannes Berg s32 signal = 0; 912a5193119269062608582418deba7af82844159aJohannes Berg 9277965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 932a5193119269062608582418deba7af82844159aJohannes Berg signal = rx_status->signal * 100; 9477965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 952a5193119269062608582418deba7af82844159aJohannes Berg signal = (rx_status->signal * 100) / local->hw.max_signal; 962a5193119269062608582418deba7af82844159aJohannes Berg 970c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_inform_bss_frame(local->hw.wiphy, channel, 980c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg mgmt, len, signal, GFP_ATOMIC); 995484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1000c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!cbss) 10100d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg return NULL; 10200d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg 1030c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->free_priv = ieee80211_rx_bss_free; 1040c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 1055484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1065484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg /* save the ERP value so that it is available at association time */ 1075484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->erp_info && elems->erp_info_len >= 1) { 1085484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->erp_value = elems->erp_info[0]; 1095484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->has_erp_value = 1; 1105484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1115484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1125484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->tim) { 1135484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_tim_ie *tim_ie = 1145484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg (struct ieee80211_tim_ie *)elems->tim; 1155484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->dtim_period = tim_ie->dtim_period; 1165484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1175484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 118e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg /* If the beacon had no TIM IE, or it was invalid, use 1 */ 119e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg if (beacon && !bss->dtim_period) 120e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg bss->dtim_period = 1; 121e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg 122f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka /* replace old supported rates if we get new values */ 123f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka srlen = 0; 1245484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->supp_rates) { 125f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka clen = IEEE80211_MAX_SUPP_RATES; 1265484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (clen > elems->supp_rates_len) 1275484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg clen = elems->supp_rates_len; 128f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka memcpy(bss->supp_rates, elems->supp_rates, clen); 129f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka srlen += clen; 1305484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1315484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (elems->ext_supp_rates) { 132f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka clen = IEEE80211_MAX_SUPP_RATES - srlen; 1335484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (clen > elems->ext_supp_rates_len) 1345484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg clen = elems->ext_supp_rates_len; 135f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, clen); 136f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka srlen += clen; 1375484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 138f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka if (srlen) 139f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka bss->supp_rates_len = srlen; 1405484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1415484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->wmm_used = elems->wmm_param || elems->wmm_info; 142ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo bss->uapsd_supported = is_uapsd_supported(elems); 1435484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1445484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (!beacon) 1455484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->last_probe_resp = jiffies; 1465484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1475484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg return bss; 1485484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 1490a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 15098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Bergieee80211_rx_result 151f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Bergieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 15298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg{ 153f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 15498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee80211_mgmt *mgmt; 155c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 15698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg u8 *elements; 15798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee80211_channel *channel; 15898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg size_t baselen; 15998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg int freq; 16098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg __le16 fc; 16198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg bool presp, beacon = false; 16298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee802_11_elems elems; 16398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 16498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (skb->len < 2) 16598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_UNUSABLE; 16698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 16798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 16898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg fc = mgmt->frame_control; 16998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 17098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (ieee80211_is_ctl(fc)) 17198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_CONTINUE; 17298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 17398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (skb->len < 24) 174306fe9384f06d31219778cece2d3c646146e7bb6Luciano Coelho return RX_CONTINUE; 17598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 17698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg presp = ieee80211_is_probe_resp(fc); 17798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (presp) { 17898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg /* ignore ProbeResp to foreign address */ 17947846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) 18098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 18198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 18298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg presp = true; 18398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.probe_resp.variable; 18498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable); 18598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } else { 18698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg beacon = ieee80211_is_beacon(fc); 18798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable); 18898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.beacon.variable; 18998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } 19098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (!presp && !beacon) 19298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_CONTINUE; 19398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (baselen > skb->len) 19598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 19698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg ieee802_11_parse_elems(elements, skb->len - baselen, &elems); 19898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (elems.ds_params && elems.ds_params_len == 1) 20059eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf freq = ieee80211_channel_to_frequency(elems.ds_params[0], 20159eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf rx_status->band); 20298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg else 20398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg freq = rx_status->freq; 20498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg channel = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 20698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 20898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 20998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 21098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg bss = ieee80211_bss_info_update(sdata->local, rx_status, 21198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg mgmt, skb->len, &elems, 2122a5193119269062608582418deba7af82844159aJohannes Berg channel, beacon); 213d048e503a2b01e771ee87921c24d89d7ec3f0c2fJouni Malinen if (bss) 214d048e503a2b01e771ee87921c24d89d7ec3f0c2fJouni Malinen ieee80211_rx_bss_put(sdata->local, bss); 21598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 21607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (channel == sdata->local->oper_channel) 217b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear return RX_CONTINUE; 218b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 21998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg dev_kfree_skb(skb); 22098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_QUEUED; 22198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg} 22298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 2234d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg/* return false if no more work */ 2244d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Bergstatic bool ieee80211_prep_hw_scan(struct ieee80211_local *local) 2254d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg{ 2264d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 2274d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg enum ieee80211_band band; 2284d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg int i, ielen, n_chans; 2294d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2304d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg do { 2314d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->hw_scan_band == IEEE80211_NUM_BANDS) 2324d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return false; 2334d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2344d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg band = local->hw_scan_band; 2354d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans = 0; 2364d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg for (i = 0; i < req->n_channels; i++) { 2374d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (req->channels[i]->band == band) { 2384d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->channels[n_chans] = 2394d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->channels[i]; 2404d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans++; 2414d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2424d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2434d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2444d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band++; 2454d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } while (!n_chans); 2464d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2474d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_channels = n_chans; 2484d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2494d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->ie, 2508ee3108075c9e9e2701493a245a754b8b0db8e57Johannes Berg req->ie, req->ie_len, band, 25185a237fe308405ee38eb9c6733571c49902ec229Johannes Berg req->rates[band], 0); 2524d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie_len = ielen; 253dcd83976bea3ae3bc0822ed26cf200d9d6203121Johannes Berg local->hw_scan_req->no_cck = req->no_cck; 2544d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2554d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return true; 2564d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg} 2574d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 258d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Bergstatic void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted, 259e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka bool was_hw_scan) 2600a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 2610a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = hw_to_local(hw); 2620a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 263e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 2645bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 2656d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg /* 2666d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * It's ok to abort a not-yet-running scan (that 2676d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * we have one at all will be verified by checking 2686d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * local->scan_req next), but not to complete it 2696d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * successfully. 2706d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg */ 2716d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg if (WARN_ON(!local->scanning && !aborted)) 2726d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg aborted = true; 2735bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 274e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (WARN_ON(!local->scan_req)) 275d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 276de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 2774d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (was_hw_scan && !aborted && ieee80211_prep_hw_scan(local)) { 2786eb11a9a311a0f7e5b9b66c18f7498a26c9ec206Stanislaw Gruszka int rc = drv_hw_scan(local, local->scan_sdata, local->hw_scan_req); 2796eb11a9a311a0f7e5b9b66c18f7498a26c9ec206Stanislaw Gruszka if (rc == 0) 280d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 2814d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2824d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2834d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 2844d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 285f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 2865ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg if (local->scan_req != local->int_scan_req) 2872a5193119269062608582418deba7af82844159aJohannes Berg cfg80211_scan_done(local->scan_req, aborted); 2882a5193119269062608582418deba7af82844159aJohannes Berg local->scan_req = NULL; 28915db0b7fd872b0312033666d3a82e1214a227ec0Johannes Berg local->scan_sdata = NULL; 2902a5193119269062608582418deba7af82844159aJohannes Berg 291fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 29258905ca5b11a0ff3860f55b789cbbf052f7158a7Johannes Berg local->scan_channel = NULL; 293f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 29407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* Set power back to normal operating levels. */ 29507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_hw_config(local, 0); 296a0daa0e7592ada797d6835f11529097aabc27ad2Luis R. Rodriguez 297e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (!was_hw_scan) { 298e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_configure_filter(local); 299e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka drv_sw_scan_complete(local); 300e76aadc572288a158ae18ae1c10fe395c7bca066Johannes Berg ieee80211_offchannel_return(local, true); 301e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 3020a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 3035cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 304e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 3050a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg ieee80211_mlme_notify_scan_completed(local); 306469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_ibss_notify_scan_completed(local); 307472dbc45dc1966284de72d7de15690c17ed2cf33Johannes Berg ieee80211_mesh_notify_scan_completed(local); 30881ac3462d346ee7aaf037a35156b0a7a354e98cfJohannes Berg ieee80211_queue_work(&local->hw, &local->work_work); 3090a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 3108789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3118789d459bc5e837bf37d261453df96ef54018d7bJohannes Bergvoid ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) 3128789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg{ 3138789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg struct ieee80211_local *local = hw_to_local(hw); 3148789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3158789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg trace_api_scan_completed(local, aborted); 3168789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3178789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_COMPLETED, &local->scanning); 3188789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg if (aborted) 3198789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_ABORTED, &local->scanning); 3208789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 3218789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg} 3220a51b27e956bd9580296c48191b78175ed8b5971Johannes BergEXPORT_SYMBOL(ieee80211_scan_completed); 3230a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 324f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int ieee80211_start_sw_scan(struct ieee80211_local *local) 325f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 326f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* 327f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Hardware/driver doesn't support hw_scan, so use software 328f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * scanning instead. First send a nullfunc frame with power save 329f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * bit on so that AP will buffer the frames for us while we are not 330f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * listening, then send probe requests to each channel and wait for 331f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * the responses. After all channels are scanned, tune back to the 332f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * original channel and send a nullfunc frame with power save bit 333f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * off to trigger the AP to send us all the buffered frames. 334f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * 335f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Note that while local->sw_scanning is true everything else but 336f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * nullfunc frames and probe requests will be dropped in 337f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * ieee80211_tx_h_check_assoc(). 338f3b85252f081581a8f257545ed748062dce7798bJohannes Berg */ 3392448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg drv_sw_scan_start(local); 340f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 341df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa local->leave_oper_channel_time = 0; 342977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 343f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_channel_idx = 0; 344f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 34507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_offchannel_stop_vifs(local, true); 346a80f7c0b088187c8471b441d461e937991870661Johannes Berg 3473ac64beecd27400d12cc7afb4108eef26c499f6aJohannes Berg ieee80211_configure_filter(local); 348f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 34959bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear /* We need to set power level at maximum rate for scanning. */ 35059bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear ieee80211_hw_config(local, 0); 35159bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear 35242935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, 35307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg &local->scan_work, 0); 354f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 355f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return 0; 356f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 357f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 358f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 359f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, 360f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 361f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 362f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct ieee80211_local *local = sdata->local; 363f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 364f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 365e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 366e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 367f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 368f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -EBUSY; 369f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 3706e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville if (!list_empty(&local->work_list)) { 3716e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* wait for the work to finish/time out */ 372c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg local->scan_req = req; 373c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg local->scan_sdata = sdata; 374c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg return 0; 375c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg } 376c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg 377f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->ops->hw_scan) { 378f3b85252f081581a8f257545ed748062dce7798bJohannes Berg u8 *ies; 379f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 3804d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = kmalloc( 3814d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 3824d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]) + 3834d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2 + IEEE80211_MAX_SSID_LEN + local->scan_ies_len + 3844d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->ie_len, GFP_KERNEL); 3854d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (!local->hw_scan_req) 386f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -ENOMEM; 387f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 3884d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ssids = req->ssids; 3894d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_ssids = req->n_ssids; 3904d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ies = (u8 *)local->hw_scan_req + 3914d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 3924d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]); 3934d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie = ies; 3944d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 3954d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band = 0; 3966e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 3976e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* 3986e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * After allocating local->hw_scan_req, we must 3996e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * go through until ieee80211_prep_hw_scan(), so 4006e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * anything that might be changed here and leave 4016e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * this function early must not go after this 4026e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * allocation. 4036e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville */ 404f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 405f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 406f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = req; 407f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_sdata = sdata; 408f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 409f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->ops->hw_scan) 410fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_HW_SCANNING, &local->scanning); 411f3b85252f081581a8f257545ed748062dce7798bJohannes Berg else 412fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_SW_SCANNING, &local->scanning); 4136e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 4145cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 415f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4164d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->ops->hw_scan) { 4174d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg WARN_ON(!ieee80211_prep_hw_scan(local)); 418a060bbfe4ee95d115e8f9705a66894ac34e2c475Johannes Berg rc = drv_hw_scan(local, sdata, local->hw_scan_req); 4194d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } else 420f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = ieee80211_start_sw_scan(local); 421f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 422f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (rc) { 4234d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 4244d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 425fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 426f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4275cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 4285cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 429f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 430f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_sdata = NULL; 431f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 432f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 433f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return rc; 434f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 435f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 436df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaastatic unsigned long 437df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaaieee80211_scan_get_channel_time(struct ieee80211_channel *chan) 438df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa{ 439df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 440df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * TODO: channel switching also consumes quite some time, 441df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * add that delay as well to get a better estimation 442df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 443df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) 444df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PASSIVE_CHANNEL_TIME; 445df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME; 446df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa} 447df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 448e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszkastatic void ieee80211_scan_state_decision(struct ieee80211_local *local, 449e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka unsigned long *next_delay) 4507d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa{ 451142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa bool associated = false; 452df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool tx_empty = true; 453df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool bad_latency; 454df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool listen_int_exceeded; 455df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa unsigned long min_beacon_int = 0; 456142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa struct ieee80211_sub_if_data *sdata; 457df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa struct ieee80211_channel *next_chan; 458142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 459df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 460df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface is associated, 461df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface has pending tx frames 462df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * and grab the lowest used beacon interval 463df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 464142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_lock(&local->iflist_mtx); 465142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa list_for_each_entry(sdata, &local->interfaces, list) { 4669607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 467142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa continue; 468142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 469142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->vif.type == NL80211_IFTYPE_STATION) { 470142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->u.mgd.associated) { 471142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa associated = true; 472df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 473df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (sdata->vif.bss_conf.beacon_int < 474df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa min_beacon_int || min_beacon_int == 0) 475df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa min_beacon_int = 476df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa sdata->vif.bss_conf.beacon_int; 477df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 478df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (!qdisc_all_tx_empty(sdata->dev)) { 479df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa tx_empty = false; 480df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa break; 481df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa } 482142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 483142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 484142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 485142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_unlock(&local->iflist_mtx); 486142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 487b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear next_chan = local->scan_req->channels[local->scan_channel_idx]; 488b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 489a80f7c0b088187c8471b441d461e937991870661Johannes Berg /* 49007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * we're currently scanning a different channel, let's 49107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * see if we can scan another channel without interfering 49207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * with the current traffic situation. 49307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * 49407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * Since we don't know if the AP has pending frames for us 49507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * we can only check for our tx queues and use the current 49607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * pm_qos requirements for rx. Hence, if no tx traffic occurs 49707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * at all we will scan as many channels in a row as the pm_qos 49807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * latency allows us to. Additionally we also check for the 49907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * currently negotiated listen interval to prevent losing 50007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * frames unnecessarily. 50107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * 50207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * Otherwise switch back to the operating channel. 503a80f7c0b088187c8471b441d461e937991870661Johannes Berg */ 504a80f7c0b088187c8471b441d461e937991870661Johannes Berg 50507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg bad_latency = time_after(jiffies + 50607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_get_channel_time(next_chan), 50707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->leave_oper_channel_time + 50807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg usecs_to_jiffies(pm_qos_request(PM_QOS_NETWORK_LATENCY))); 509df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 51007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg listen_int_exceeded = time_after(jiffies + 51107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_get_channel_time(next_chan), 51207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->leave_oper_channel_time + 51307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg usecs_to_jiffies(min_beacon_int * 1024) * 51407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->hw.conf.listen_interval); 515142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 51607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (associated && (!tx_empty || bad_latency || listen_int_exceeded)) 51707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->next_scan_state = SCAN_SUSPEND; 51807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg else 51907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->next_scan_state = SCAN_SET_CHANNEL; 520142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 52107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = 0; 522142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa} 523142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 5242fb3f028a9a46bd344329766257699b4acb36525Helmut Schaastatic void ieee80211_scan_state_set_channel(struct ieee80211_local *local, 5252fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa unsigned long *next_delay) 5262fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa{ 5272fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa int skip; 5282fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa struct ieee80211_channel *chan; 5292fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa 5307d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa skip = 0; 5317d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa chan = local->scan_req->channels[local->scan_channel_idx]; 5327d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 533584991dccfd347cd2e1675ab262998f6c335d3c0Johannes Berg local->scan_channel = chan; 534b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 53507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL)) 53607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg skip = 1; 5377d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5387d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* advance state machine to next channel/band */ 5397d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_channel_idx++; 5407d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5410ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa if (skip) { 5420ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa /* if we skip this channel return to the decision state */ 5430ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa local->next_scan_state = SCAN_DECISION; 5442fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 5450ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa } 5467d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5477d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* 5487d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * Probe delay is used to update the NAV, cf. 11.1.3.2.2 5497d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * (which unfortunately doesn't say _why_ step a) is done, 5507d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * but it waits for the probe delay or until a frame is 5517d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received - and the received frame would update the NAV). 5527d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * For now, we do not support waiting until a frame is 5537d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received. 5547d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * 5557d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * In any case, it is not necessary for a passive scan. 5567d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa */ 5577d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN || 5587d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa !local->scan_req->n_ssids) { 5597d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; 560977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 5612fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 5627d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa } 5637d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5642fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa /* active scan, send probes */ 5657d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PROBE_DELAY; 566977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_SEND_PROBE; 5677d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa} 5687d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5697d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaastatic void ieee80211_scan_state_send_probe(struct ieee80211_local *local, 5707d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa unsigned long *next_delay) 5717d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa{ 5727d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa int i; 5737d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa struct ieee80211_sub_if_data *sdata = local->scan_sdata; 57485a237fe308405ee38eb9c6733571c49902ec229Johannes Berg enum ieee80211_band band = local->hw.conf.channel->band; 5757d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5767d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa for (i = 0; i < local->scan_req->n_ssids; i++) 5777d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa ieee80211_send_probe_req( 5787d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa sdata, NULL, 5797d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_req->ssids[i].ssid, 5807d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_req->ssids[i].ssid_len, 581a806c558e01747b499201d2667818f03d79ef1e3Paul Stewart local->scan_req->ie, local->scan_req->ie_len, 582aad14ceb45f5ff12da2ab5b37a596e6f81566515Rajkumar Manoharan local->scan_req->rates[band], false, 583aad14ceb45f5ff12da2ab5b37a596e6f81566515Rajkumar Manoharan local->scan_req->no_cck); 5847d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5857d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* 5867d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * After sending probe requests, wait for probe responses 5877d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * on the channel. 5887d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa */ 5897d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_CHANNEL_TIME; 590977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 5917d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa} 5927d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 59307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Bergstatic void ieee80211_scan_state_suspend(struct ieee80211_local *local, 59407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg unsigned long *next_delay) 59507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg{ 59607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* switch back to the operating channel */ 59707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->scan_channel = NULL; 59807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); 59907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 60007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* 60107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * Re-enable vifs and beaconing. Leave PS 60207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * in off-channel state..will put that back 60307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * on-channel at the end of scanning. 60407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg */ 605e76aadc572288a158ae18ae1c10fe395c7bca066Johannes Berg ieee80211_offchannel_return(local, false); 60607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 60707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = HZ / 5; 60807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* afterwards, resume scan & go to next channel */ 60907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->next_scan_state = SCAN_RESUME; 61007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg} 61107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 61207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Bergstatic void ieee80211_scan_state_resume(struct ieee80211_local *local, 61307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg unsigned long *next_delay) 61407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg{ 61507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* PS already is in off-channel mode */ 61607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_offchannel_stop_vifs(local, false); 61707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 61807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (local->ops->flush) { 61907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg drv_flush(local, false); 62007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = 0; 62107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg } else 62207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = HZ / 10; 62307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 62407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* remember when we left the operating channel */ 62507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->leave_oper_channel_time = jiffies; 62607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 62707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* advance to the next channel to be scanned */ 628de2ee84db6a0201278e35590821cd014cb71830aMohammed Shafi Shajakhan local->next_scan_state = SCAN_SET_CHANNEL; 62907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg} 63007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 631c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergvoid ieee80211_scan_work(struct work_struct *work) 6320a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 6330a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = 6340a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg container_of(work, struct ieee80211_local, scan_work.work); 635d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg struct ieee80211_sub_if_data *sdata; 6360a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg unsigned long next_delay = 0; 637d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg bool aborted, hw_scan; 6380a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 639259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_lock(&local->mtx); 6408789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 641d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg sdata = local->scan_sdata; 642d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg 643259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) { 6448789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); 645259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 6468789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg } 6478789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 648259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (!sdata || !local->scan_req) 649259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 650f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 651fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa if (local->scan_req && !local->scanning) { 652f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 653f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 654f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 655f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 65615db0b7fd872b0312033666d3a82e1214a227ec0Johannes Berg local->scan_sdata = NULL; 657f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 658f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = __ieee80211_start_scan(sdata, req); 659259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (rc) { 6603aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka /* need to complete scan in cfg80211 */ 6613aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka local->scan_req = req; 662259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka aborted = true; 663259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 664259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka } else 665259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 666f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 667f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 6685bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg /* 6695bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg * Avoid re-scheduling when the sdata is going away. 6705bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg */ 6719607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) { 672259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka aborted = true; 673259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 674f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 6750a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 676f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa /* 677f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * as long as no delay is required advance immediately 678f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * without scheduling a new work 679f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa */ 680f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa do { 681c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan if (!ieee80211_sdata_running(sdata)) { 682c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan aborted = true; 683c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan goto out_complete; 684c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan } 685c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan 686977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa switch (local->next_scan_state) { 6872fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_DECISION: 688e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka /* if no more bands/channels left, complete scan */ 689e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (local->scan_channel_idx >= local->scan_req->n_channels) { 690e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka aborted = false; 691e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka goto out_complete; 692e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 693e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_scan_state_decision(local, &next_delay); 694f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 6952fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_SET_CHANNEL: 6962fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa ieee80211_scan_state_set_channel(local, &next_delay); 6972fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa break; 698f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa case SCAN_SEND_PROBE: 699f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa ieee80211_scan_state_send_probe(local, &next_delay); 700f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 70107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg case SCAN_SUSPEND: 70207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_state_suspend(local, &next_delay); 703142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 70407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg case SCAN_RESUME: 70507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_state_resume(local, &next_delay); 706142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 707f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } 708f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } while (next_delay == 0); 7090a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 71042935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay); 711d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg goto out; 712259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka 713259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout_complete: 714e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning); 715d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg __ieee80211_scan_completed(&local->hw, aborted, hw_scan); 716259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout: 717259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_unlock(&local->mtx); 7180a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 7190a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 720f3b85252f081581a8f257545ed748062dce7798bJohannes Bergint ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, 721f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 7220a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 723f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int res; 724de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 725a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&sdata->local->mtx); 726f3b85252f081581a8f257545ed748062dce7798bJohannes Berg res = __ieee80211_start_scan(sdata, req); 727a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&sdata->local->mtx); 7280a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 729f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return res; 7300a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 7310a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 732f3b85252f081581a8f257545ed748062dce7798bJohannes Bergint ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata, 733be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg const u8 *ssid, u8 ssid_len, 734be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg struct ieee80211_channel *chan) 7350a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 7360a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = sdata->local; 737f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int ret = -EBUSY; 738fb63bc41772259701a827e9a6117219a7393554fGertjan van Wingerde enum ieee80211_band band; 7392a5193119269062608582418deba7af82844159aJohannes Berg 740a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 7410a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 742f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* busy scanning */ 743f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 744f3b85252f081581a8f257545ed748062dce7798bJohannes Berg goto unlock; 7459116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 746be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg /* fill internal scan request */ 747be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!chan) { 748be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg int i, nchan = 0; 749be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 750be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 751be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!local->hw.wiphy->bands[band]) 752be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg continue; 753be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg for (i = 0; 754be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg i < local->hw.wiphy->bands[band]->n_channels; 755be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg i++) { 756be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->channels[nchan] = 757be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg &local->hw.wiphy->bands[band]->channels[i]; 758be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg nchan++; 759be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 760be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 761be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 762be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_channels = nchan; 763be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } else { 764be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->channels[0] = chan; 765be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_channels = 1; 766be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 767be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 768be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->ssids = &local->scan_ssid; 769be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_ssids = 1; 7705ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN); 7715ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg local->int_scan_req->ssids[0].ssid_len = ssid_len; 7729116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 7735ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req); 774f3b85252f081581a8f257545ed748062dce7798bJohannes Berg unlock: 775a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&local->mtx); 776f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return ret; 7770a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 7785bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 7794136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka/* 7804136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Only call this function when a scan can't be queued -- under RTNL. 7814136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka */ 7825bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_scan_cancel(struct ieee80211_local *local) 7835bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 7845bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg /* 785b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * We are canceling software scan, or deferred scan that was not 7864136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * yet really started (see __ieee80211_start_scan ). 7874136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 7884136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Regarding hardware scan: 7894136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not call __ieee80211_scan_completed() as when 7904136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * SCAN_HW_SCANNING bit is set this function change 7914136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * local->hw_scan_req to operate on 5G band, what race with 7924136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * driver which can use local->hw_scan_req 7934136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 7944136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not cancel scan_work since driver can schedule it 7954136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * by ieee80211_scan_completed(..., true) to finish scan 7964136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 797b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * Hence we only call the cancel_hw_scan() callback, but the low-level 798b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * driver is still responsible for calling ieee80211_scan_completed() 799b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * after the scan was completed/aborted. 8005bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg */ 8014136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka 802a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 803b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (!local->scan_req) 804b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 805b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 806b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (test_bit(SCAN_HW_SCANNING, &local->scanning)) { 807b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (local->ops->cancel_hw_scan) 808b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller drv_cancel_hw_scan(local, local->scan_sdata); 809b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 8104136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka } 811b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 812b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* 813b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * If the work is currently running, it must be blocked on 814b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * the mutex, but we'll set scan_sdata = NULL and it'll 815b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * simply exit once it acquires the mutex. 816b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller */ 817b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller cancel_delayed_work(&local->scan_work); 818b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* and clean up */ 819b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller __ieee80211_scan_completed(&local->hw, true, false); 820b856439b1b54358e580aaee5dbe683af5ada9403Eliad Pellerout: 821d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg mutex_unlock(&local->mtx); 8225bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 82379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 82479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoint ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, 82579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct cfg80211_sched_scan_request *req) 82679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 82779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 82879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho int ret, i; 82979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 83079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_lock(&sdata->local->mtx); 83179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 83279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (local->sched_scanning) { 83379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -EBUSY; 83479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 83579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 83679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 83779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->ops->sched_scan_start) { 83879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOTSUPP; 83979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 84079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 84179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 84279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 84379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.ie[i] = kzalloc(2 + 84479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho IEEE80211_MAX_SSID_LEN + 8451186980dafcd14d0e257a4dd6990cefdc6f3e362Luciano Coelho local->scan_ies_len + 8461186980dafcd14d0e257a4dd6990cefdc6f3e362Luciano Coelho req->ie_len, 84779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho GFP_KERNEL); 84879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->sched_scan_ies.ie[i]) { 84979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOMEM; 85079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out_free; 85179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 85279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 85379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.len[i] = 85479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ieee80211_build_preq_ies(local, 85579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.ie[i], 85679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho req->ie, req->ie_len, i, 85779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho (u32) -1, 0); 85879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 85979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 86079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = drv_sched_scan_start(local, sdata, req, 86179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho &local->sched_scan_ies); 86279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (ret == 0) { 86379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scanning = true; 86479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 86579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 86679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 86779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout_free: 86879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho while (i > 0) 86979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho kfree(local->sched_scan_ies.ie[--i]); 87079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout: 87179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_unlock(&sdata->local->mtx); 87279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 87379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 87479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 87585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhoint ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata) 87679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 87779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 87879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho int ret = 0, i; 87979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 88079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_lock(&sdata->local->mtx); 88179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 88279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->ops->sched_scan_stop) { 88379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOTSUPP; 88479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 88579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 88679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 88779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (local->sched_scanning) { 88879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) 88979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho kfree(local->sched_scan_ies.ie[i]); 89079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 89185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho drv_sched_scan_stop(local, sdata); 89279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scanning = false; 89379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 89479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout: 89579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_unlock(&sdata->local->mtx); 89679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 89779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 89879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 89979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 90079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_results(struct ieee80211_hw *hw) 90179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 90279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 90379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 90479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_results(local); 90579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 90679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho cfg80211_sched_scan_results(hw->wiphy); 90779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 90879f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_results); 90979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 91085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhovoid ieee80211_sched_scan_stopped_work(struct work_struct *work) 91185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho{ 91285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho struct ieee80211_local *local = 91385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho container_of(work, struct ieee80211_local, 91485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho sched_scan_stopped_work); 91585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho int i; 91685a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 91785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_lock(&local->mtx); 91885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 91985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho if (!local->sched_scanning) { 92085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 92185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho return; 92285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho } 92385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 92485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) 92585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho kfree(local->sched_scan_ies.ie[i]); 92685a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 92785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho local->sched_scanning = false; 92885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 92985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 93085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 93185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho cfg80211_sched_scan_stopped(local->hw.wiphy); 93285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho} 93385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 93479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) 93579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 93679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 93779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 93879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_stopped(local); 93979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 94085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho ieee80211_queue_work(&local->hw, &local->sched_scan_stopped_work); 94179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 94279f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_stopped); 943