scan.c revision de312db345f9770b64ff39ef5a7f86f6358e93cc
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> 16888d04dfbe7e09f930fdaafb257cce2c54c9c3f3Felix Fietkau#include <linux/etherdevice.h> 17078e1e60dd6c6b0d4bc8d58ccb80c008e8efc9ffJohannes Berg#include <linux/rtnetlink.h> 18e8db0be1245de16a6cc6365506abc392c3c212d4Jean Pihet#include <linux/pm_qos.h> 19df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa#include <net/sch_generic.h> 205a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 21bc3b2d7fb9b014d75ebb79ba371a763dbab5e8cfPaul Gortmaker#include <linux/export.h> 220a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include <net/mac80211.h> 230a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 240a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#include "ieee80211_i.h" 252448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg#include "driver-ops.h" 265484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg#include "mesh.h" 270a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 280a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_PROBE_DELAY (HZ / 33) 290a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg#define IEEE80211_CHANNEL_TIME (HZ / 33) 3096f7e73938da744e718ce4817dd3e7e424624654Helmut Schaa#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 8) 310a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 32c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergstruct ieee80211_bss * 335484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, 345484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg u8 *ssid, u8 ssid_len) 355484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 360c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 370c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 380c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, 390c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ieee80211_get_channel(local->hw.wiphy, freq), 400c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bssid, ssid, ssid_len, 0, 0); 410c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!cbss) 420c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return NULL; 430c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return (void *)cbss->priv; 445484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 455484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 4600d3f14cf9f12c21428121026a5e1d5f65926447Johannes Bergstatic void ieee80211_rx_bss_free(struct cfg80211_bss *cbss) 475484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 480c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss = (void *)cbss->priv; 495484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 505484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg kfree(bss_mesh_id(bss)); 515484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg kfree(bss_mesh_cfg(bss)); 525484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 535484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 545484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergvoid ieee80211_rx_bss_put(struct ieee80211_local *local, 55c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss) 565484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 570c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!bss) 580c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg return; 590c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cfg80211_put_bss(container_of((void *)bss, struct cfg80211_bss, priv)); 605484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 615484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 62ab13315af97919fae0e014748105fdc2e30afb2dKalle Valostatic bool is_uapsd_supported(struct ieee802_11_elems *elems) 63ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo{ 64ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo u8 qos_info; 65ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 66ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo if (elems->wmm_info && elems->wmm_info_len == 7 67ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_info[5] == 1) 68ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_info[6]; 69ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else if (elems->wmm_param && elems->wmm_param_len == 24 70ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo && elems->wmm_param[5] == 1) 71ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo qos_info = elems->wmm_param[6]; 72ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo else 73ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo /* no valid wmm information or parameter element found */ 74ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return false; 75ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 76ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo return qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD; 77ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo} 78ab13315af97919fae0e014748105fdc2e30afb2dKalle Valo 79c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergstruct ieee80211_bss * 805484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Bergieee80211_bss_info_update(struct ieee80211_local *local, 815484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_rx_status *rx_status, 825484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_mgmt *mgmt, 835484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg size_t len, 845484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee802_11_elems *elems, 852a5193119269062608582418deba7af82844159aJohannes Berg struct ieee80211_channel *channel, 862a5193119269062608582418deba7af82844159aJohannes Berg bool beacon) 875484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg{ 880c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 89c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 90f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka int clen, srlen; 912a5193119269062608582418deba7af82844159aJohannes Berg s32 signal = 0; 922a5193119269062608582418deba7af82844159aJohannes Berg 9377965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 942a5193119269062608582418deba7af82844159aJohannes Berg signal = rx_status->signal * 100; 9577965c970d7da9c9b6349ff2b1d9adecf54c403bJohannes Berg else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 962a5193119269062608582418deba7af82844159aJohannes Berg signal = (rx_status->signal * 100) / local->hw.max_signal; 972a5193119269062608582418deba7af82844159aJohannes Berg 980c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_inform_bss_frame(local->hw.wiphy, channel, 990c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg mgmt, len, signal, GFP_ATOMIC); 1005484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1010c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!cbss) 10200d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg return NULL; 10300d3f14cf9f12c21428121026a5e1d5f65926447Johannes Berg 1040c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->free_priv = ieee80211_rx_bss_free; 1050c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 1065484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 107fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->parse_error) { 108fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (beacon) 109fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data |= IEEE80211_BSS_CORRUPT_BEACON; 110fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart else 111fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data |= IEEE80211_BSS_CORRUPT_PROBE_RESP; 112fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } else { 113fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (beacon) 114fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_BEACON; 115fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart else 116fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->corrupt_data &= ~IEEE80211_BSS_CORRUPT_PROBE_RESP; 117fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 118fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart 1195484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg /* save the ERP value so that it is available at association time */ 120fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->erp_info && elems->erp_info_len >= 1 && 121fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart (!elems->parse_error || 122fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart !(bss->valid_data & IEEE80211_BSS_VALID_ERP))) { 1235484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->erp_value = elems->erp_info[0]; 1243db1cd5c05f35fb43eb134df6f321de4e63141f2Rusty Russell bss->has_erp_value = true; 125fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error) 126fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->valid_data |= IEEE80211_BSS_VALID_ERP; 1275484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1285484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 129fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->tim && (!elems->parse_error || 130fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart !(bss->valid_data & IEEE80211_BSS_VALID_DTIM))) { 1315484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg struct ieee80211_tim_ie *tim_ie = 1325484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg (struct ieee80211_tim_ie *)elems->tim; 1335484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->dtim_period = tim_ie->dtim_period; 134fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error) 135fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->valid_data |= IEEE80211_BSS_VALID_DTIM; 1365484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1375484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 138e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg /* If the beacon had no TIM IE, or it was invalid, use 1 */ 139e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg if (beacon && !bss->dtim_period) 140e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg bss->dtim_period = 1; 141e5b900d228b76d445a4240d9aeb3cd8f79205a91Johannes Berg 142f0b058b61711ebf5be94d6865ca7b2c259b71d37Stanislaw Gruszka /* replace old supported rates if we get new values */ 143fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error || 144fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart !(bss->valid_data & IEEE80211_BSS_VALID_RATES)) { 145fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart srlen = 0; 146fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->supp_rates) { 147fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = IEEE80211_MAX_SUPP_RATES; 148fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (clen > elems->supp_rates_len) 149fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = elems->supp_rates_len; 150fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart memcpy(bss->supp_rates, elems->supp_rates, clen); 151fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart srlen += clen; 152fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 153fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (elems->ext_supp_rates) { 154fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = IEEE80211_MAX_SUPP_RATES - srlen; 155fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (clen > elems->ext_supp_rates_len) 156fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen = elems->ext_supp_rates_len; 157fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart memcpy(bss->supp_rates + srlen, elems->ext_supp_rates, 158fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart clen); 159fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart srlen += clen; 160fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 161fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (srlen) { 162fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->supp_rates_len = srlen; 163fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error) 164fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->valid_data |= IEEE80211_BSS_VALID_RATES; 165fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 1665484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg } 1675484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 168fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error || 169fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart !(bss->valid_data & IEEE80211_BSS_VALID_WMM)) { 170fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->wmm_used = elems->wmm_param || elems->wmm_info; 171fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->uapsd_supported = is_uapsd_supported(elems); 172fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart if (!elems->parse_error) 173fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart bss->valid_data |= IEEE80211_BSS_VALID_WMM; 174fcff4f108dce0692410f390a05565f4b1b84577fPaul Stewart } 1755484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1765484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg if (!beacon) 1775484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg bss->last_probe_resp = jiffies; 1785484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg 1795484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg return bss; 1805484e23749e78d5a4f56928efaf3c4b0d862b7a6Johannes Berg} 1810a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 18298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Bergieee80211_rx_result 183f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Bergieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 18498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg{ 185f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); 18698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee80211_mgmt *mgmt; 187c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Berg struct ieee80211_bss *bss; 18898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg u8 *elements; 18998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee80211_channel *channel; 19098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg size_t baselen; 19198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg int freq; 19298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg __le16 fc; 19398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg bool presp, beacon = false; 19498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg struct ieee802_11_elems elems; 19598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (skb->len < 2) 19798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_UNUSABLE; 19898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 19998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 20098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg fc = mgmt->frame_control; 20198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (ieee80211_is_ctl(fc)) 20398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_CONTINUE; 20498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (skb->len < 24) 206306fe9384f06d31219778cece2d3c646146e7bb6Luciano Coelho return RX_CONTINUE; 20798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 20898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg presp = ieee80211_is_probe_resp(fc); 20998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (presp) { 21098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg /* ignore ProbeResp to foreign address */ 211888d04dfbe7e09f930fdaafb257cce2c54c9c3f3Felix Fietkau if (compare_ether_addr(mgmt->da, sdata->vif.addr)) 21298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 21398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 21498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg presp = true; 21598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.probe_resp.variable; 21698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable); 21798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } else { 21898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg beacon = ieee80211_is_beacon(fc); 21998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable); 22098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg elements = mgmt->u.beacon.variable; 22198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg } 22298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 22398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (!presp && !beacon) 22498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_CONTINUE; 22598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 22698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (baselen > skb->len) 22798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 22898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 22998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg ieee802_11_parse_elems(elements, skb->len - baselen, &elems); 23098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 23198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (elems.ds_params && elems.ds_params_len == 1) 23259eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf freq = ieee80211_channel_to_frequency(elems.ds_params[0], 23359eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf rx_status->band); 23498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg else 23598c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg freq = rx_status->freq; 23698c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 23798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg channel = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 23898c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 23998c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 24098c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_DROP_MONITOR; 24198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 24298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg bss = ieee80211_bss_info_update(sdata->local, rx_status, 24398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg mgmt, skb->len, &elems, 2442a5193119269062608582418deba7af82844159aJohannes Berg channel, beacon); 245d048e503a2b01e771ee87921c24d89d7ec3f0c2fJouni Malinen if (bss) 246d048e503a2b01e771ee87921c24d89d7ec3f0c2fJouni Malinen ieee80211_rx_bss_put(sdata->local, bss); 24798c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 24807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (channel == sdata->local->oper_channel) 249b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear return RX_CONTINUE; 250b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 25198c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg dev_kfree_skb(skb); 25298c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg return RX_QUEUED; 25398c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg} 25498c8fccfaea838e62ffde2f2e44568844e0e5472Johannes Berg 2554d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg/* return false if no more work */ 2564d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Bergstatic bool ieee80211_prep_hw_scan(struct ieee80211_local *local) 2574d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg{ 2584d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 2594d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg enum ieee80211_band band; 2604d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg int i, ielen, n_chans; 2614d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2624d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg do { 2634d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->hw_scan_band == IEEE80211_NUM_BANDS) 2644d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return false; 2654d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2664d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg band = local->hw_scan_band; 2674d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans = 0; 2684d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg for (i = 0; i < req->n_channels; i++) { 2694d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (req->channels[i]->band == band) { 2704d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->channels[n_chans] = 2714d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->channels[i]; 2724d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg n_chans++; 2734d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2744d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 2754d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2764d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band++; 2774d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } while (!n_chans); 2784d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2794d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_channels = n_chans; 2804d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2814d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->ie, 2828ee3108075c9e9e2701493a245a754b8b0db8e57Johannes Berg req->ie, req->ie_len, band, 28385a237fe308405ee38eb9c6733571c49902ec229Johannes Berg req->rates[band], 0); 2844d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie_len = ielen; 285dcd83976bea3ae3bc0822ed26cf200d9d6203121Johannes Berg local->hw_scan_req->no_cck = req->no_cck; 2864d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2874d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg return true; 2884d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg} 2894d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 290d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Bergstatic void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted, 291e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka bool was_hw_scan) 2920a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 2930a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = hw_to_local(hw); 2940a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 295e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 2965bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 2976d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg /* 2986d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * It's ok to abort a not-yet-running scan (that 2996d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * we have one at all will be verified by checking 3006d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * local->scan_req next), but not to complete it 3016d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg * successfully. 3026d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg */ 3036d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg if (WARN_ON(!local->scanning && !aborted)) 3046d3560d4fc9c5b9fe1a07a63926ea70512c69c32Johannes Berg aborted = true; 3055bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg 306e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (WARN_ON(!local->scan_req)) 307d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 308de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 3094d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (was_hw_scan && !aborted && ieee80211_prep_hw_scan(local)) { 3106eb11a9a311a0f7e5b9b66c18f7498a26c9ec206Stanislaw Gruszka int rc = drv_hw_scan(local, local->scan_sdata, local->hw_scan_req); 3116eb11a9a311a0f7e5b9b66c18f7498a26c9ec206Stanislaw Gruszka if (rc == 0) 312d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg return; 3134d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } 3144d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 3154d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 3164d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 317f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 3185ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg if (local->scan_req != local->int_scan_req) 3192a5193119269062608582418deba7af82844159aJohannes Berg cfg80211_scan_done(local->scan_req, aborted); 3202a5193119269062608582418deba7af82844159aJohannes Berg local->scan_req = NULL; 32115db0b7fd872b0312033666d3a82e1214a227ec0Johannes Berg local->scan_sdata = NULL; 3222a5193119269062608582418deba7af82844159aJohannes Berg 323fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 32458905ca5b11a0ff3860f55b789cbbf052f7158a7Johannes Berg local->scan_channel = NULL; 325f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 32607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* Set power back to normal operating levels. */ 32707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_hw_config(local, 0); 328a0daa0e7592ada797d6835f11529097aabc27ad2Luis R. Rodriguez 329e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (!was_hw_scan) { 330e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_configure_filter(local); 331e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka drv_sw_scan_complete(local); 332e76aadc572288a158ae18ae1c10fe395c7bca066Johannes Berg ieee80211_offchannel_return(local, true); 333e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 3340a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 3355cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 336e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 3370a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg ieee80211_mlme_notify_scan_completed(local); 338469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_ibss_notify_scan_completed(local); 339472dbc45dc1966284de72d7de15690c17ed2cf33Johannes Berg ieee80211_mesh_notify_scan_completed(local); 34081ac3462d346ee7aaf037a35156b0a7a354e98cfJohannes Berg ieee80211_queue_work(&local->hw, &local->work_work); 3410a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 3428789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3438789d459bc5e837bf37d261453df96ef54018d7bJohannes Bergvoid ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) 3448789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg{ 3458789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg struct ieee80211_local *local = hw_to_local(hw); 3468789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3478789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg trace_api_scan_completed(local, aborted); 3488789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 3498789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_COMPLETED, &local->scanning); 3508789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg if (aborted) 3518789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg set_bit(SCAN_ABORTED, &local->scanning); 3528789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 3538789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg} 3540a51b27e956bd9580296c48191b78175ed8b5971Johannes BergEXPORT_SYMBOL(ieee80211_scan_completed); 3550a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 356f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int ieee80211_start_sw_scan(struct ieee80211_local *local) 357f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 358f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* 359f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Hardware/driver doesn't support hw_scan, so use software 360f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * scanning instead. First send a nullfunc frame with power save 361f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * bit on so that AP will buffer the frames for us while we are not 362f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * listening, then send probe requests to each channel and wait for 363f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * the responses. After all channels are scanned, tune back to the 364f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * original channel and send a nullfunc frame with power save bit 365f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * off to trigger the AP to send us all the buffered frames. 366f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * 367f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * Note that while local->sw_scanning is true everything else but 368f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * nullfunc frames and probe requests will be dropped in 369f3b85252f081581a8f257545ed748062dce7798bJohannes Berg * ieee80211_tx_h_check_assoc(). 370f3b85252f081581a8f257545ed748062dce7798bJohannes Berg */ 3712448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg drv_sw_scan_start(local); 372f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 373de312db345f9770b64ff39ef5a7f86f6358e93ccRajkumar Manoharan local->leave_oper_channel_time = jiffies; 374977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 375f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_channel_idx = 0; 376f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 37707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_offchannel_stop_vifs(local, true); 378a80f7c0b088187c8471b441d461e937991870661Johannes Berg 3793ac64beecd27400d12cc7afb4108eef26c499f6aJohannes Berg ieee80211_configure_filter(local); 380f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 38159bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear /* We need to set power level at maximum rate for scanning. */ 38259bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear ieee80211_hw_config(local, 0); 38359bdf3b0fe7a183f18ce94696259c4c76abb4568Ben Greear 38442935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, 38507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg &local->scan_work, 0); 386f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 387f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return 0; 388f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 389f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 390f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 391f3b85252f081581a8f257545ed748062dce7798bJohannes Bergstatic int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, 392f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 393f3b85252f081581a8f257545ed748062dce7798bJohannes Berg{ 394f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct ieee80211_local *local = sdata->local; 395f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 396f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 397e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka lockdep_assert_held(&local->mtx); 398e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka 399f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 400f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -EBUSY; 401f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4026e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville if (!list_empty(&local->work_list)) { 4036e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* wait for the work to finish/time out */ 404c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg local->scan_req = req; 405c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg local->scan_sdata = sdata; 406c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg return 0; 407c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg } 408c0ce77b8323c1a0d4eeef97caf16c0ea971222a9Johannes Berg 409f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->ops->hw_scan) { 410f3b85252f081581a8f257545ed748062dce7798bJohannes Berg u8 *ies; 411f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4124d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = kmalloc( 4134d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 4144d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]) + 4154d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 2 + IEEE80211_MAX_SSID_LEN + local->scan_ies_len + 4164d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->ie_len, GFP_KERNEL); 4174d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (!local->hw_scan_req) 418f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return -ENOMEM; 419f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4204d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ssids = req->ssids; 4214d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->n_ssids = req->n_ssids; 4224d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg ies = (u8 *)local->hw_scan_req + 4234d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg sizeof(*local->hw_scan_req) + 4244d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg req->n_channels * sizeof(req->channels[0]); 4254d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req->ie = ies; 4264d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg 4274d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_band = 0; 4286e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 4296e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville /* 4306e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * After allocating local->hw_scan_req, we must 4316e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * go through until ieee80211_prep_hw_scan(), so 4326e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * anything that might be changed here and leave 4336e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * this function early must not go after this 4346e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville * allocation. 4356e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville */ 436f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 437f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 438f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = req; 439f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_sdata = sdata; 440f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 441f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->ops->hw_scan) 442fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_HW_SCANNING, &local->scanning); 443f3b85252f081581a8f257545ed748062dce7798bJohannes Berg else 444fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa __set_bit(SCAN_SW_SCANNING, &local->scanning); 4456e7e6213e4956828927c30e3ef5a42812d00c650John W. Linville 4465cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 447f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4484d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg if (local->ops->hw_scan) { 4494d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg WARN_ON(!ieee80211_prep_hw_scan(local)); 450a060bbfe4ee95d115e8f9705a66894ac34e2c475Johannes Berg rc = drv_hw_scan(local, sdata, local->hw_scan_req); 4514d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg } else 452f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = ieee80211_start_sw_scan(local); 453f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 454f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (rc) { 4554d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg kfree(local->hw_scan_req); 4564d36ec58239eec44d77839ef6c25108efcbbb58cJohannes Berg local->hw_scan_req = NULL; 457fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa local->scanning = 0; 458f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 4595cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(local); 4605cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 461f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 462f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_sdata = NULL; 463f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 464f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 465f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return rc; 466f3b85252f081581a8f257545ed748062dce7798bJohannes Berg} 467f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 468df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaastatic unsigned long 469df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaaieee80211_scan_get_channel_time(struct ieee80211_channel *chan) 470df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa{ 471df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 472df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * TODO: channel switching also consumes quite some time, 473df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * add that delay as well to get a better estimation 474df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 475df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) 476df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PASSIVE_CHANNEL_TIME; 477df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa return IEEE80211_PROBE_DELAY + IEEE80211_CHANNEL_TIME; 478df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa} 479df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 480e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszkastatic void ieee80211_scan_state_decision(struct ieee80211_local *local, 481e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka unsigned long *next_delay) 4827d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa{ 483142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa bool associated = false; 484df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool tx_empty = true; 485df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool bad_latency; 486df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa bool listen_int_exceeded; 487df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa unsigned long min_beacon_int = 0; 488142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa struct ieee80211_sub_if_data *sdata; 489df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa struct ieee80211_channel *next_chan; 490142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 491df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa /* 492df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface is associated, 493df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * check if at least one STA interface has pending tx frames 494df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa * and grab the lowest used beacon interval 495df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa */ 496142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_lock(&local->iflist_mtx); 497142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa list_for_each_entry(sdata, &local->interfaces, list) { 4989607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 499142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa continue; 500142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 501142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->vif.type == NL80211_IFTYPE_STATION) { 502142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa if (sdata->u.mgd.associated) { 503142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa associated = true; 504df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 505df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (sdata->vif.bss_conf.beacon_int < 506df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa min_beacon_int || min_beacon_int == 0) 507df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa min_beacon_int = 508df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa sdata->vif.bss_conf.beacon_int; 509df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 510df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa if (!qdisc_all_tx_empty(sdata->dev)) { 511df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa tx_empty = false; 512df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa break; 513df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa } 514142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 515142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 516142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa } 517142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa mutex_unlock(&local->iflist_mtx); 518142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 519b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear next_chan = local->scan_req->channels[local->scan_channel_idx]; 520b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 521a80f7c0b088187c8471b441d461e937991870661Johannes Berg /* 52207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * we're currently scanning a different channel, let's 52307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * see if we can scan another channel without interfering 52407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * with the current traffic situation. 52507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * 52607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * Since we don't know if the AP has pending frames for us 52707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * we can only check for our tx queues and use the current 52807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * pm_qos requirements for rx. Hence, if no tx traffic occurs 52907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * at all we will scan as many channels in a row as the pm_qos 53007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * latency allows us to. Additionally we also check for the 53107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * currently negotiated listen interval to prevent losing 53207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * frames unnecessarily. 53307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * 53407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * Otherwise switch back to the operating channel. 535a80f7c0b088187c8471b441d461e937991870661Johannes Berg */ 536a80f7c0b088187c8471b441d461e937991870661Johannes Berg 53707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg bad_latency = time_after(jiffies + 53807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_get_channel_time(next_chan), 53907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->leave_oper_channel_time + 54007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg usecs_to_jiffies(pm_qos_request(PM_QOS_NETWORK_LATENCY))); 541df13cce53a7b28a81460e6bfc4857e9df4956141Helmut Schaa 54207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg listen_int_exceeded = time_after(jiffies + 54307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_get_channel_time(next_chan), 54407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->leave_oper_channel_time + 54507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg usecs_to_jiffies(min_beacon_int * 1024) * 54607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->hw.conf.listen_interval); 547142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 54807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (associated && (!tx_empty || bad_latency || listen_int_exceeded)) 54907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->next_scan_state = SCAN_SUSPEND; 55007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg else 55107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->next_scan_state = SCAN_SET_CHANNEL; 552142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 55307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = 0; 554142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa} 555142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa 5562fb3f028a9a46bd344329766257699b4acb36525Helmut Schaastatic void ieee80211_scan_state_set_channel(struct ieee80211_local *local, 5572fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa unsigned long *next_delay) 5582fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa{ 5592fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa int skip; 5602fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa struct ieee80211_channel *chan; 5612fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa 5627d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa skip = 0; 5637d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa chan = local->scan_req->channels[local->scan_channel_idx]; 5647d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 565584991dccfd347cd2e1675ab262998f6c335d3c0Johannes Berg local->scan_channel = chan; 566b23b025fe246f3acc2988eb6d400df34c27cb8aeBen Greear 56707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL)) 56807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg skip = 1; 5697d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5707d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* advance state machine to next channel/band */ 5717d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_channel_idx++; 5727d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5730ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa if (skip) { 5740ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa /* if we skip this channel return to the decision state */ 5750ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa local->next_scan_state = SCAN_DECISION; 5762fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 5770ee9c13c7c92581ab005d80795cf65897213b249Helmut Schaa } 5787d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5797d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* 5807d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * Probe delay is used to update the NAV, cf. 11.1.3.2.2 5817d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * (which unfortunately doesn't say _why_ step a) is done, 5827d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * but it waits for the probe delay or until a frame is 5837d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received - and the received frame would update the NAV). 5847d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * For now, we do not support waiting until a frame is 5857d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * received. 5867d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * 5877d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * In any case, it is not necessary for a passive scan. 5887d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa */ 5897d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN || 5907d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa !local->scan_req->n_ssids) { 5917d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; 592977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 5932fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa return; 5947d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa } 5957d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 5962fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa /* active scan, send probes */ 5977d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_PROBE_DELAY; 598977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_SEND_PROBE; 5997d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa} 6007d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6017d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaastatic void ieee80211_scan_state_send_probe(struct ieee80211_local *local, 6027d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa unsigned long *next_delay) 6037d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa{ 6047d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa int i; 6057d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa struct ieee80211_sub_if_data *sdata = local->scan_sdata; 60685a237fe308405ee38eb9c6733571c49902ec229Johannes Berg enum ieee80211_band band = local->hw.conf.channel->band; 6077d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6087d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa for (i = 0; i < local->scan_req->n_ssids; i++) 6097d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa ieee80211_send_probe_req( 6107d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa sdata, NULL, 6117d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_req->ssids[i].ssid, 6127d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa local->scan_req->ssids[i].ssid_len, 613a806c558e01747b499201d2667818f03d79ef1e3Paul Stewart local->scan_req->ie, local->scan_req->ie_len, 614aad14ceb45f5ff12da2ab5b37a596e6f81566515Rajkumar Manoharan local->scan_req->rates[band], false, 615aad14ceb45f5ff12da2ab5b37a596e6f81566515Rajkumar Manoharan local->scan_req->no_cck); 6167d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 6177d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa /* 6187d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * After sending probe requests, wait for probe responses 6197d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa * on the channel. 6207d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa */ 6217d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa *next_delay = IEEE80211_CHANNEL_TIME; 622977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa local->next_scan_state = SCAN_DECISION; 6237d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa} 6247d3be3cc489176bc7bd23e673b0b4aef597af2b3Helmut Schaa 62507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Bergstatic void ieee80211_scan_state_suspend(struct ieee80211_local *local, 62607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg unsigned long *next_delay) 62707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg{ 62807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* switch back to the operating channel */ 62907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->scan_channel = NULL; 63007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); 63107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 63207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* 63307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * Re-enable vifs and beaconing. Leave PS 63407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * in off-channel state..will put that back 63507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg * on-channel at the end of scanning. 63607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg */ 637e76aadc572288a158ae18ae1c10fe395c7bca066Johannes Berg ieee80211_offchannel_return(local, false); 63807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 63907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = HZ / 5; 64007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* afterwards, resume scan & go to next channel */ 64107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->next_scan_state = SCAN_RESUME; 64207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg} 64307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 64407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Bergstatic void ieee80211_scan_state_resume(struct ieee80211_local *local, 64507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg unsigned long *next_delay) 64607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg{ 64707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* PS already is in off-channel mode */ 64807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_offchannel_stop_vifs(local, false); 64907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 65007ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg if (local->ops->flush) { 65107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg drv_flush(local, false); 65207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = 0; 65307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg } else 65407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg *next_delay = HZ / 10; 65507ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 65607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* remember when we left the operating channel */ 65707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg local->leave_oper_channel_time = jiffies; 65807ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 65907ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg /* advance to the next channel to be scanned */ 660de2ee84db6a0201278e35590821cd014cb71830aMohammed Shafi Shajakhan local->next_scan_state = SCAN_SET_CHANNEL; 66107ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg} 66207ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg 663c2b13452b283f9c4a5b02a6b53ed6416ebf4c03cJohannes Bergvoid ieee80211_scan_work(struct work_struct *work) 6640a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 6650a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = 6660a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg container_of(work, struct ieee80211_local, scan_work.work); 667d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg struct ieee80211_sub_if_data *sdata; 6680a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg unsigned long next_delay = 0; 669d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg bool aborted, hw_scan; 6700a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 671259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_lock(&local->mtx); 6728789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 673d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg sdata = local->scan_sdata; 674d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg 675259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) { 6768789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning); 677259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 6788789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg } 6798789d459bc5e837bf37d261453df96ef54018d7bJohannes Berg 680259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (!sdata || !local->scan_req) 681259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 682f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 683fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa if (local->scan_req && !local->scanning) { 684f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req = local->scan_req; 685f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int rc; 686f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 687f3b85252f081581a8f257545ed748062dce7798bJohannes Berg local->scan_req = NULL; 68815db0b7fd872b0312033666d3a82e1214a227ec0Johannes Berg local->scan_sdata = NULL; 689f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 690f3b85252f081581a8f257545ed748062dce7798bJohannes Berg rc = __ieee80211_start_scan(sdata, req); 691259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka if (rc) { 6923aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka /* need to complete scan in cfg80211 */ 6933aed49ef17c7bc8397420529ac976fe058818e3dStanislaw Gruszka local->scan_req = req; 694259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka aborted = true; 695259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 696259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka } else 697259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out; 698f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 699f3b85252f081581a8f257545ed748062dce7798bJohannes Berg 7005bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg /* 7015bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg * Avoid re-scheduling when the sdata is going away. 7025bc75728fd43bb15b46f16ef465bcf9d487393cfJohannes Berg */ 7039607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) { 704259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka aborted = true; 705259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka goto out_complete; 706f3b85252f081581a8f257545ed748062dce7798bJohannes Berg } 7070a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 708f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa /* 709f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * as long as no delay is required advance immediately 710f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa * without scheduling a new work 711f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa */ 712f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa do { 713c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan if (!ieee80211_sdata_running(sdata)) { 714c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan aborted = true; 715c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan goto out_complete; 716c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan } 717c29acf201007a6d73223f864f52406eb5ba19933Rajkumar Manoharan 718977923b00c79185c11b4b47664f5ffa4c3820438Helmut Schaa switch (local->next_scan_state) { 7192fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_DECISION: 720e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka /* if no more bands/channels left, complete scan */ 721e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka if (local->scan_channel_idx >= local->scan_req->n_channels) { 722e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka aborted = false; 723e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka goto out_complete; 724e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka } 725e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka ieee80211_scan_state_decision(local, &next_delay); 726f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 7272fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa case SCAN_SET_CHANNEL: 7282fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa ieee80211_scan_state_set_channel(local, &next_delay); 7292fb3f028a9a46bd344329766257699b4acb36525Helmut Schaa break; 730f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa case SCAN_SEND_PROBE: 731f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa ieee80211_scan_state_send_probe(local, &next_delay); 732f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa break; 73307ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg case SCAN_SUSPEND: 73407ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_state_suspend(local, &next_delay); 735142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 73607ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg case SCAN_RESUME: 73707ef03ee8b280a536b38ccfe512b9556996f0492Johannes Berg ieee80211_scan_state_resume(local, &next_delay); 738142b9f5074dc0d09dc0025739ad437723d7bf527Helmut Schaa break; 739f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } 740f502d09b750437a4ec9c63333acf1070fe7958afHelmut Schaa } while (next_delay == 0); 7410a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 74242935ecaf4e784d0815afa9a7e5fe7e141157ca3Luis R. Rodriguez ieee80211_queue_delayed_work(&local->hw, &local->scan_work, next_delay); 743d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg goto out; 744259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka 745259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout_complete: 746e229f844d7223b7063bea1e649203ac521a58fe1Stanislaw Gruszka hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning); 747d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg __ieee80211_scan_completed(&local->hw, aborted, hw_scan); 748259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszkaout: 749259b62e35bf44a97983f275de569929a7d2bd5ddStanislaw Gruszka mutex_unlock(&local->mtx); 7500a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 7510a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 752f3b85252f081581a8f257545ed748062dce7798bJohannes Bergint ieee80211_request_scan(struct ieee80211_sub_if_data *sdata, 753f3b85252f081581a8f257545ed748062dce7798bJohannes Berg struct cfg80211_scan_request *req) 7540a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 755f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int res; 756de95a54b1aebe5592cae971ca5e5d9ec6a381a17Johannes Berg 757a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&sdata->local->mtx); 758f3b85252f081581a8f257545ed748062dce7798bJohannes Berg res = __ieee80211_start_scan(sdata, req); 759a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&sdata->local->mtx); 7600a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 761f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return res; 7620a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 7630a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 764f3b85252f081581a8f257545ed748062dce7798bJohannes Bergint ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata, 765be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg const u8 *ssid, u8 ssid_len, 766be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg struct ieee80211_channel *chan) 7670a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg{ 7680a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg struct ieee80211_local *local = sdata->local; 769f3b85252f081581a8f257545ed748062dce7798bJohannes Berg int ret = -EBUSY; 770fb63bc41772259701a827e9a6117219a7393554fGertjan van Wingerde enum ieee80211_band band; 7712a5193119269062608582418deba7af82844159aJohannes Berg 772a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 7730a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg 774f3b85252f081581a8f257545ed748062dce7798bJohannes Berg /* busy scanning */ 775f3b85252f081581a8f257545ed748062dce7798bJohannes Berg if (local->scan_req) 776f3b85252f081581a8f257545ed748062dce7798bJohannes Berg goto unlock; 7779116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 778be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg /* fill internal scan request */ 779be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!chan) { 780be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg int i, nchan = 0; 781be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 782be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 783be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg if (!local->hw.wiphy->bands[band]) 784be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg continue; 785be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg for (i = 0; 786be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg i < local->hw.wiphy->bands[band]->n_channels; 787be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg i++) { 788be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->channels[nchan] = 789be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg &local->hw.wiphy->bands[band]->channels[i]; 790be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg nchan++; 791be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 792be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 793be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 794be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_channels = nchan; 795be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } else { 796be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->channels[0] = chan; 797be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_channels = 1; 798be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg } 799be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg 800be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->ssids = &local->scan_ssid; 801be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg local->int_scan_req->n_ssids = 1; 8025ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN); 8035ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg local->int_scan_req->ssids[0].ssid_len = ssid_len; 8049116dd01120e249dc2e84e6edecd7ad7f828680fJohannes Berg 8055ba63533bbf653631faab60f6988506160ec6ba4Johannes Berg ret = __ieee80211_start_scan(sdata, sdata->local->int_scan_req); 806f3b85252f081581a8f257545ed748062dce7798bJohannes Berg unlock: 807a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_unlock(&local->mtx); 808f3b85252f081581a8f257545ed748062dce7798bJohannes Berg return ret; 8090a51b27e956bd9580296c48191b78175ed8b5971Johannes Berg} 8105bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 8114136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka/* 8124136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Only call this function when a scan can't be queued -- under RTNL. 8134136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka */ 8145bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_scan_cancel(struct ieee80211_local *local) 8155bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 8165bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg /* 817b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * We are canceling software scan, or deferred scan that was not 8184136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * yet really started (see __ieee80211_start_scan ). 8194136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 8204136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * Regarding hardware scan: 8214136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not call __ieee80211_scan_completed() as when 8224136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * SCAN_HW_SCANNING bit is set this function change 8234136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * local->hw_scan_req to operate on 5G band, what race with 8244136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * driver which can use local->hw_scan_req 8254136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 8264136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * - we can not cancel scan_work since driver can schedule it 8274136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * by ieee80211_scan_completed(..., true) to finish scan 8284136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka * 829b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * Hence we only call the cancel_hw_scan() callback, but the low-level 830b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * driver is still responsible for calling ieee80211_scan_completed() 831b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * after the scan was completed/aborted. 8325bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg */ 8334136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka 834a1699b75a1db31a1da2f0fc610ee696d02a19280Johannes Berg mutex_lock(&local->mtx); 835b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (!local->scan_req) 836b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 837b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 838b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (test_bit(SCAN_HW_SCANNING, &local->scanning)) { 839b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller if (local->ops->cancel_hw_scan) 840b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller drv_cancel_hw_scan(local, local->scan_sdata); 841b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller goto out; 8424136c4224ccf1907d309e1cdfaefef9da97dbc5eStanislaw Gruszka } 843b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller 844b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* 845b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * If the work is currently running, it must be blocked on 846b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * the mutex, but we'll set scan_sdata = NULL and it'll 847b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller * simply exit once it acquires the mutex. 848b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller */ 849b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller cancel_delayed_work(&local->scan_work); 850b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller /* and clean up */ 851b856439b1b54358e580aaee5dbe683af5ada9403Eliad Peller __ieee80211_scan_completed(&local->hw, true, false); 852b856439b1b54358e580aaee5dbe683af5ada9403Eliad Pellerout: 853d07bfd8b6f20a81d7ec65c50f35b053d9e3aa740Johannes Berg mutex_unlock(&local->mtx); 8545bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 85579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 85679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoint ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, 85779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct cfg80211_sched_scan_request *req) 85879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 85979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 86079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho int ret, i; 86179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 86279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_lock(&sdata->local->mtx); 86379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 86479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (local->sched_scanning) { 86579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -EBUSY; 86679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 86779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 86879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 86979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->ops->sched_scan_start) { 87079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOTSUPP; 87179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 87279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 87379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 87479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 87579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.ie[i] = kzalloc(2 + 87679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho IEEE80211_MAX_SSID_LEN + 8771186980dafcd14d0e257a4dd6990cefdc6f3e362Luciano Coelho local->scan_ies_len + 8781186980dafcd14d0e257a4dd6990cefdc6f3e362Luciano Coelho req->ie_len, 87979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho GFP_KERNEL); 88079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->sched_scan_ies.ie[i]) { 88179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOMEM; 88279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out_free; 88379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 88479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 88579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.len[i] = 88679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ieee80211_build_preq_ies(local, 88779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scan_ies.ie[i], 88879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho req->ie, req->ie_len, i, 88979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho (u32) -1, 0); 89079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 89179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 89279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = drv_sched_scan_start(local, sdata, req, 89379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho &local->sched_scan_ies); 89479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (ret == 0) { 89579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scanning = true; 89679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 89779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 89879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 89979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout_free: 90079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho while (i > 0) 90179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho kfree(local->sched_scan_ies.ie[--i]); 90279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout: 90379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_unlock(&sdata->local->mtx); 90479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 90579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 90679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 90785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhoint ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata) 90879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 90979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = sdata->local; 91079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho int ret = 0, i; 91179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 91279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_lock(&sdata->local->mtx); 91379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 91479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (!local->ops->sched_scan_stop) { 91579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho ret = -ENOTSUPP; 91679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho goto out; 91779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 91879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 91979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho if (local->sched_scanning) { 92079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) 92179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho kfree(local->sched_scan_ies.ie[i]); 92279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 92385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho drv_sched_scan_stop(local, sdata); 92479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho local->sched_scanning = false; 92579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho } 92679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhoout: 92779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho mutex_unlock(&sdata->local->mtx); 92879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 92979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho return ret; 93079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 93179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 93279f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_results(struct ieee80211_hw *hw) 93379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 93479f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 93579f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 93679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_results(local); 93779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 93879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho cfg80211_sched_scan_results(hw->wiphy); 93979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 94079f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_results); 94179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 94285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelhovoid ieee80211_sched_scan_stopped_work(struct work_struct *work) 94385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho{ 94485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho struct ieee80211_local *local = 94585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho container_of(work, struct ieee80211_local, 94685a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho sched_scan_stopped_work); 94785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho int i; 94885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 94985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_lock(&local->mtx); 95085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 95185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho if (!local->sched_scanning) { 95285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 95385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho return; 95485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho } 95585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 95685a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho for (i = 0; i < IEEE80211_NUM_BANDS; i++) 95785a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho kfree(local->sched_scan_ies.ie[i]); 95885a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 95985a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho local->sched_scanning = false; 96085a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 96185a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho mutex_unlock(&local->mtx); 96285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 96385a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho cfg80211_sched_scan_stopped(local->hw.wiphy); 96485a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho} 96585a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho 96679f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelhovoid ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) 96779f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho{ 96879f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho struct ieee80211_local *local = hw_to_local(hw); 96979f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 97079f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho trace_api_sched_scan_stopped(local); 97179f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho 97285a9994a0a6cba1a6cc6af4bd3ebd85f778be0feLuciano Coelho ieee80211_queue_work(&local->hw, &local->sched_scan_stopped_work); 97379f460ca49d8d5700756ab7071c951311c7f29ccLuciano Coelho} 97479f460ca49d8d5700756ab7071c951311c7f29ccLuciano CoelhoEXPORT_SYMBOL(ieee80211_sched_scan_stopped); 975