ibss.c revision 7ca15a0ae865067aac8d36e27e0acbe4a8f1e70a
1469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg/* 2469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * IBSS mode implementation 3469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * Copyright 2004, Instant802 Networks, Inc. 5469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * Copyright 2005, Devicescape Software, Inc. 6469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> 9469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * 10469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * This program is free software; you can redistribute it and/or modify 11469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * it under the terms of the GNU General Public License version 2 as 12469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * published by the Free Software Foundation. 13469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg */ 14469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 15469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include <linux/delay.h> 165a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 17469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include <linux/if_ether.h> 18469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include <linux/skbuff.h> 19469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include <linux/if_arp.h> 20469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include <linux/etherdevice.h> 21469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include <linux/rtnetlink.h> 22469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include <net/mac80211.h> 23469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 24469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include "ieee80211_i.h" 252448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg#include "driver-ops.h" 26469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include "rate.h" 27469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 28469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_SCAN_INTERVAL (2 * HZ) 29469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) 30469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 31469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) 32469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) 33469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 34469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_MAX_STA_ENTRIES 128 35469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 36469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 37af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 38af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg const u8 *bssid, const int beacon_int, 39af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan, 40b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg const u32 basic_rates, 41c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan const u16 capability, u64 tsf, 42c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan bool creator) 43469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 44469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 45469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 462103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int rates_n = 0, i, ri; 47469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 48469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos; 49469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_supported_band *sband; 50f446d10f214091408b7300f15c9adf60569edf28Johannes Berg struct cfg80211_bss *bss; 512103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich u32 bss_change, rate_flags, rates = 0, rates_added = 0; 52b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; 53683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg struct cfg80211_chan_def chandef; 547ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich enum nl80211_bss_scan_width scan_width; 55c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg struct beacon_data *presp; 56c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg int frame_len; 572103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int shift; 582448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg 598d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 607a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 612448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* Reset own TSF to allow time synchronization work. */ 6237a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller drv_reset_tsf(local, sdata); 63469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 64b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(ifibss->bssid, bssid)) 65b998e8bb3e1c6eeae5eab9d6a434563270286c3bJohannes Berg sta_info_flush(sdata); 66469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6749b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg /* if merging, indicate to driver that we leave the old IBSS */ 6849b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg if (sdata->vif.bss_conf.ibss_joined) { 6949b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 70c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = false; 711852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg sdata->vif.bss_conf.enable_beacon = false; 7286a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 731852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg ieee80211_bss_info_change_notify(sdata, 741852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg BSS_CHANGED_IBSS | 751852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg BSS_CHANGED_BEACON_ENABLED); 7649b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg } 7749b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg 78c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp = rcu_dereference_protected(ifibss->presp, 798d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg lockdep_is_held(&sdata->wdev.mtx)); 80c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg rcu_assign_pointer(ifibss->presp, NULL); 81c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (presp) 82c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg kfree_rcu(presp, rcu_head); 831852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg 84af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; 85469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 863aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich chandef = ifibss->chandef; 874bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { 884bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg chandef.width = NL80211_CHAN_WIDTH_20; 894bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg chandef.center_freq1 = chan->center_freq; 904bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg } 9155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 9255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ieee80211_vif_release_channel(sdata); 934bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (ieee80211_vif_use_channel(sdata, &chandef, 9455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ifibss->fixed_channel ? 9555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_CHANCTX_SHARED : 9655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_CHANCTX_EXCLUSIVE)) { 9755de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg sdata_info(sdata, "Failed to join IBSS, no channel context\n"); 9855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return; 9913c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 10055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 10155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg memcpy(ifibss->bssid, bssid, ETH_ALEN); 10257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 103af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sband = local->hw.wiphy->bands[chan->band]; 1042103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich shift = ieee80211_vif_get_shift(&sdata->vif); 105469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 106469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Build IBSS probe response */ 107c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg frame_len = sizeof(struct ieee80211_hdr_3addr) + 108c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 12 /* struct ieee80211_mgmt.u.beacon */ + 109c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + 110c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + 8 /* max Supported Rates */ + 111c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 3 /* max DS params */ + 112c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 4 /* IBSS params */ + 113c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 114c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + sizeof(struct ieee80211_ht_cap) + 115c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + sizeof(struct ieee80211_ht_operation) + 116c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg ifibss->ie_len; 117c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); 118c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (!presp) 119c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg return; 120c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 121c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp->head = (void *)(presp + 1); 122c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 123c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg mgmt = (void *) presp->head; 124469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 125469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_STYPE_PROBE_RESP); 126e83e6541cee0a12bc445b0f4fad5214df5803087Johannes Berg eth_broadcast_addr(mgmt->da); 12747846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 128469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 12957c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); 130707c1b4e68a2811ff2c9e75750a98a3310789a2dSujith mgmt->u.beacon.timestamp = cpu_to_le64(tsf); 131469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->u.beacon.capab_info = cpu_to_le16(capability); 132469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 133c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); 134c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 135469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SSID; 136469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = ifibss->ssid_len; 137469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, ifibss->ssid, ifibss->ssid_len); 138c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg pos += ifibss->ssid_len; 139469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1402103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich rate_flags = ieee80211_chandef_rate_flags(&chandef); 1412103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich for (i = 0; i < sband->n_bitrates; i++) { 1422103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1432103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich continue; 1442103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 1452103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich rates |= BIT(i); 1462103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich rates_n++; 1472103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich } 1482103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 149469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SUPP_RATES; 1502103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich *pos++ = min_t(int, 8, rates_n); 1512103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich for (ri = 0; ri < sband->n_bitrates; ri++) { 1522103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, 1532103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 5 * (1 << shift)); 154c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg u8 basic = 0; 1552103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if (!(rates & BIT(ri))) 1562103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich continue; 1572103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 1582103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if (basic_rates & BIT(ri)) 159c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg basic = 0x80; 1602103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich *pos++ = basic | (u8) rate; 1612103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if (++rates_added == 8) 1622103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich break; 163c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg } 164469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 165469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sband->band == IEEE80211_BAND_2GHZ) { 166469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_DS_PARAMS; 167469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 1; 168af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 169469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 170469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 171469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_IBSS_PARAMS; 172469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 2; 173469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* FIX: set ATIM window based on scan results */ 174469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 175469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 176469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1772103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ 1782103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if (rates_n > 8) { 179469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_EXT_SUPP_RATES; 1802103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich *pos++ = rates_n - 8; 1812103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich for (; ri < sband->n_bitrates; ri++) { 1822103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, 1832103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 5 * (1 << shift)); 184c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg u8 basic = 0; 1852103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if (!(rates & BIT(ri))) 1862103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich continue; 1872103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 1882103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if (basic_rates & BIT(ri)) 189c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg basic = 0x80; 1902103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich *pos++ = basic | (u8) rate; 191c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg } 192469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 193469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 194c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (ifibss->ie_len) { 195c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg memcpy(pos, ifibss->ie, ifibss->ie_len); 196c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg pos += ifibss->ie_len; 197c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg } 198af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 19913c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* add HT capability and information IEs */ 2004bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (chandef.width != NL80211_CHAN_WIDTH_20_NOHT && 2010418a445838749c51cf1e31a9c7ace6685ae87cdSimon Wunderlich chandef.width != NL80211_CHAN_WIDTH_5 && 2020418a445838749c51cf1e31a9c7ace6685ae87cdSimon Wunderlich chandef.width != NL80211_CHAN_WIDTH_10 && 203683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg sband->ht_cap.ht_supported) { 204822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich struct ieee80211_sta_ht_cap ht_cap; 205822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich 206822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 207822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich ieee80211_apply_htcap_overrides(sdata, &ht_cap); 208822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich 209822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); 2100d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan /* 2110d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * Note: According to 802.11n-2009 9.13.3.1, HT Protection 2120d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * field and RIFS Mode are reserved in IBSS mode, therefore 2130d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * keep them at 0 2140d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan */ 215074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, 2164bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg &chandef, 0); 21713c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 21813c40c54682ffe62977f670681268a26d500d6faAlexander Simon 21932c5057b22a60b23353dda93c57e475856ca286cJohannes Berg if (local->hw.queues >= IEEE80211_NUM_ACS) { 2209eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = WLAN_EID_VENDOR_SPECIFIC; 2219eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 7; /* len */ 2229eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ 2239eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x50; 2249eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0xf2; 2259eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 2; /* WME */ 2269eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* WME info */ 2279eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 1; /* WME ver */ 2289eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* U-APSD no in use */ 2299eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 2309eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 231c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp->head_len = pos - presp->head; 232c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (WARN_ON(presp->head_len > frame_len)) 233c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg return; 234c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 235c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg rcu_assign_pointer(ifibss->presp, presp); 236469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 237d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg sdata->vif.bss_conf.enable_beacon = true; 2382d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg sdata->vif.bss_conf.beacon_int = beacon_int; 239fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->vif.bss_conf.basic_rates = basic_rates; 2400ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; 2410ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); 2422d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change = BSS_CHANGED_BEACON_INT; 2432d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= ieee80211_reset_erp_info(sdata); 2442d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BSSID; 2452d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON; 2462d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON_ENABLED; 247392cfdb10dab6c7dfa5fed18d8a44d7453d42196Teemu Paasikivi bss_change |= BSS_CHANGED_BASIC_RATES; 24813c40c54682ffe62977f670681268a26d500d6faAlexander Simon bss_change |= BSS_CHANGED_HT; 2498fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg bss_change |= BSS_CHANGED_IBSS; 2500ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak bss_change |= BSS_CHANGED_SSID; 2512f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich 2522f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich /* 2532f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * In 5 GHz/802.11a, we can always use short slot time. 2542f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * (IEEE 802.11-2012 18.3.8.7) 2552f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * 2562f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * In 2.4GHz, we must always use long slots in IBSS for compatibility 2572f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * reasons. 2582f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * (IEEE 802.11-2012 19.4.5) 2592f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * 2602f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * HT follows these specifications (IEEE 802.11-2012 20.3.18) 2612f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich */ 2622f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; 2632f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich bss_change |= BSS_CHANGED_ERP_SLOT; 2642f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich 2658fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = true; 266c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = creator; 2672d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg ieee80211_bss_info_change_notify(sdata, bss_change); 268469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 2692103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich ieee80211_sta_def_wmm_params(sdata, rates, supp_rates); 270469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 271469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ifibss->state = IEEE80211_IBSS_MLME_JOINED; 272af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 273af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 274469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 2757ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width = cfg80211_chandef_to_scan_width(&chandef); 2767ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan, 2777ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width, mgmt, 2787ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich presp->head_len, 0, GFP_KERNEL); 2795b112d3d098c97b867cc580f590395cd1e72f18cJohannes Berg cfg80211_put_bss(local->hw.wiphy, bss); 28086a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_on(sdata->dev); 281af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); 282469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 283469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 284af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 285af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_bss *bss) 286469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 2870c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss = 2880c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg container_of((void *)bss, struct cfg80211_bss, priv); 289b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg struct ieee80211_supported_band *sband; 290b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u32 basic_rates; 291b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int i, j; 2920c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg u16 beacon_int = cbss->beacon_interval; 2938cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg const struct cfg80211_bss_ies *ies; 2948cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg u64 tsf; 2952103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich u32 rate_flags; 2962103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int shift; 29757c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2988d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 2997a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 30057c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg if (beacon_int < 10) 30157c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int = 10; 30257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 3030c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; 3042103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); 3052103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich shift = ieee80211_vif_get_shift(&sdata->vif); 306b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 307b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates = 0; 308b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 309b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < bss->supp_rates_len; i++) { 3102103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int rate = bss->supp_rates[i] & 0x7f; 311b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg bool is_basic = !!(bss->supp_rates[i] & 0x80); 312b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 313b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (j = 0; j < sband->n_bitrates; j++) { 3142103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int brate; 3152103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if ((rate_flags & sband->bitrates[j].flags) 3162103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich != rate_flags) 3172103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich continue; 3182103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 3192103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 3202103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 5 * (1 << shift)); 3212103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if (brate == rate) { 322b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (is_basic) 323b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates |= BIT(j); 324b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg break; 325b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 326b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 327b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 328b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 3298cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg rcu_read_lock(); 3308cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg ies = rcu_dereference(cbss->ies); 3318cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg tsf = ies->tsf; 3328cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg rcu_read_unlock(); 3338cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg 3340c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg __ieee80211_sta_join_ibss(sdata, cbss->bssid, 33557c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int, 3360c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->channel, 337b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates, 3380c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->capability, 3398cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg tsf, false); 340469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 341469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 34252874a5e3917dde3b081521b014d6e4b226aacffAntonio Quartullistatic struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) 3438bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 3448bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 3458bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_sub_if_data *sdata = sta->sdata; 3468bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u8 addr[ETH_ALEN]; 3478bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3488bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg memcpy(addr, sta->sta.addr, ETH_ALEN); 3498bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 350bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); 3518bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 35283d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 35383d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 354267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli /* authorize the station only if the network is not RSN protected. If 355267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli * not wait for the userspace to authorize it */ 356267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli if (!sta->sdata->u.ibss.control_port) 357267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 3588bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3598bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rate_control_rate_init(sta); 3608bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3618bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* If it fails, maybe we raced another insertion? */ 3628bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (sta_info_insert_rcu(sta)) 3638bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta_info_get(sdata, addr); 3648bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta; 3658bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 3668bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3678bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergstatic struct sta_info * 36852874a5e3917dde3b081521b014d6e4b226aacffAntonio Quartulliieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, 36952874a5e3917dde3b081521b014d6e4b226aacffAntonio Quartulli const u8 *addr, u32 supp_rates) 3708bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 3718bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 3728bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3738bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_local *local = sdata->local; 3748bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 37555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg struct ieee80211_chanctx_conf *chanctx_conf; 376b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan struct ieee80211_supported_band *sband; 37774608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich enum nl80211_bss_scan_width scan_width; 37855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg int band; 3798bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3808bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* 3818bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * XXX: Consider removing the least recently used entry and 3828bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * allow new one to be added. 3838bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg */ 3848bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 385bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 386e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 3878bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3888bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3898bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3908bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3918bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { 3928bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3938bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3948bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3958bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 396b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { 3978bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3988bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3998bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 4008bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 40155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_lock(); 40255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 40355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (WARN_ON_ONCE(!chanctx_conf)) 40455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return NULL; 4054bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg band = chanctx_conf->def.chan->band; 40674608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); 40755de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 40855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 4098bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_KERNEL); 4108bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (!sta) { 4118bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 4128bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 4138bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 4148bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 4158bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->last_rx = jiffies; 4168bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 4178bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* make sure mandatory rates are always added */ 418b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan sband = local->hw.wiphy->bands[band]; 4198bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->sta.supp_rates[band] = supp_rates | 42074608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich ieee80211_mandatory_rates(sband, scan_width); 4218bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 42252874a5e3917dde3b081521b014d6e4b226aacffAntonio Quartulli return ieee80211_ibss_finish_sta(sta); 4236d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli} 4246d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4252cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartullistatic void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, 4262cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli struct ieee80211_mgmt *mgmt, 4272cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli size_t len) 4282cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli{ 4292cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); 4302cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 4312cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli if (len < IEEE80211_DEAUTH_FRAME_LEN) 4322cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli return; 4332cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 4342cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", 4352cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli mgmt->sa, mgmt->da, mgmt->bssid, reason); 4362cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli sta_info_destroy_addr(sdata, mgmt->sa); 4372cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli} 4382cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 4396d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartullistatic void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, 4406d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli struct ieee80211_mgmt *mgmt, 4416d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli size_t len) 4426d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli{ 4436d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli u16 auth_alg, auth_transaction; 4446d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4458d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 4466d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4476d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli if (len < 24 + 6) 4486d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return; 4496d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4506d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4516d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4526d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 453bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 454bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", 455bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); 4567bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli 4577bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) 4587bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli return; 4597bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli 4602cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli /* 4616d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * IEEE 802.11 standard does not require authentication in IBSS 4626d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * networks and most implementations do not seem to use it. 4636d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * However, try to reply to authentication attempts if someone 4646d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * has actually implemented this. 4656d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli */ 466700e8ea6770df3113e735bcc76ecd6ffac71a13cJouni Malinen ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, 4671672c0e31917f49d31d30d79067103432bc20cc7Johannes Berg mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); 4688bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 4698bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 470469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 471d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_mgmt *mgmt, size_t len, 472469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status, 473d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee802_11_elems *elems) 474469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 475469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 476469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int freq; 4770c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 478469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_bss *bss; 479469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 480469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_channel *channel; 481469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u64 beacon_timestamp, rx_timestamp; 482469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u32 supp_rates = 0; 483469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg enum ieee80211_band band = rx_status->band; 48474608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich enum nl80211_bss_scan_width scan_width; 48513c40c54682ffe62977f670681268a26d500d6faAlexander Simon struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 48613c40c54682ffe62977f670681268a26d500d6faAlexander Simon bool rates_updated = false; 487469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4881cd8e88e17729f57a9c7f751103e522596bb5de2Johannes Berg if (elems->ds_params) 48959eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf freq = ieee80211_channel_to_frequency(elems->ds_params[0], 49059eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf band); 491469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 492469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg freq = rx_status->freq; 493469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 494469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg channel = ieee80211_get_channel(local->hw.wiphy, freq); 495469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 496469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 497469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 498469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4999eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 500b203ca39126bad99583c908be587df067820a1eaJoe Perches ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { 501469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 502469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 503abe60632f311d515b082b450504ee24006023951Johannes Berg sta = sta_info_get(sdata, mgmt->sa); 504469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5059eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (elems->supp_rates) { 5062103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich supp_rates = ieee80211_sta_get_rates(sdata, elems, 5079ebb61a23d90703344fc609fbee8da67b1e7456cAshok Nagarajan band, NULL); 5089eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta) { 5099eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf u32 prev_rates; 5109eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 5119eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf prev_rates = sta->sta.supp_rates[band]; 5129eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf /* make sure mandatory rates are always added */ 51374608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich scan_width = NL80211_BSS_CHAN_WIDTH_20; 51474608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich if (rx_status->flag & RX_FLAG_5MHZ) 51574608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich scan_width = NL80211_BSS_CHAN_WIDTH_5; 51674608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich if (rx_status->flag & RX_FLAG_10MHZ) 51774608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich scan_width = NL80211_BSS_CHAN_WIDTH_10; 518469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 51974608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich sta->sta.supp_rates[band] = supp_rates | 52074608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich ieee80211_mandatory_rates(sband, 52174608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich scan_width); 5229eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta->sta.supp_rates[band] != prev_rates) { 523bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 524bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", 525bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.addr, prev_rates, 526bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.supp_rates[band]); 52713c40c54682ffe62977f670681268a26d500d6faAlexander Simon rates_updated = true; 5289eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 5298bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } else { 5308bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 5319eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, 53252874a5e3917dde3b081521b014d6e4b226aacffAntonio Quartulli mgmt->sa, supp_rates); 5338bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 53434e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg } 5359eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 5369eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta && elems->wmm_info) 537c2c98fdeb5c897499644eb247285c8e3dacc6450Johannes Berg set_sta_flag(sta, WLAN_STA_WME); 5389eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 539074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg if (sta && elems->ht_operation && elems->ht_cap_elem && 5403aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && 5413aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && 5423aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { 54313c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* we both use HT */ 544e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg struct ieee80211_ht_cap htcap_ie; 5454bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg struct cfg80211_chan_def chandef; 5464bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg 5474bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg ieee80211_ht_oper_to_chandef(channel, 5484bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg elems->ht_operation, 5494bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg &chandef); 55013c40c54682ffe62977f670681268a26d500d6faAlexander Simon 551e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); 55213c40c54682ffe62977f670681268a26d500d6faAlexander Simon 55313c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* 55413c40c54682ffe62977f670681268a26d500d6faAlexander Simon * fall back to HT20 if we don't use or use 55513c40c54682ffe62977f670681268a26d500d6faAlexander Simon * the other extension channel 55613c40c54682ffe62977f670681268a26d500d6faAlexander Simon */ 5573aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich if (chandef.center_freq1 != 5583aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich sdata->u.ibss.chandef.center_freq1) 559e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg htcap_ie.cap_info &= 560e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40); 561e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg 562e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap( 563e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg sdata, sband, &htcap_ie, sta); 56413c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 56513c40c54682ffe62977f670681268a26d500d6faAlexander Simon 566e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli if (sta && rates_updated) { 567e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli drv_sta_rc_update(local, sdata, &sta->sta, 568e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli IEEE80211_RC_SUPP_RATES_CHANGED); 56913c40c54682ffe62977f670681268a26d500d6faAlexander Simon rate_control_rate_init(sta); 570e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli } 57113c40c54682ffe62977f670681268a26d500d6faAlexander Simon 5729eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf rcu_read_unlock(); 573469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 574469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 575469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 576d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach channel); 577469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!bss) 578469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 579469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5800c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = container_of((void *)bss, struct cfg80211_bss, priv); 5810c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 5828cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg /* same for beacon and probe response */ 5838cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); 584469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 585469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* check if we need to merge IBSS */ 586469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 587469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* we use a fixed BSSID */ 588a98bfec2985221d8e0904a526cbe88590eaad2a6Benoit Papillault if (sdata->u.ibss.fixed_bssid) 589469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 590469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 591469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* not an IBSS */ 5920c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) 593469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 594469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 595469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different channel */ 59655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (sdata->u.ibss.fixed_channel && 5973aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich sdata->u.ibss.chandef.chan != cbss->channel) 598469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 599469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 600469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different SSID */ 601469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ssid_len != sdata->u.ibss.ssid_len || 602469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcmp(elems->ssid, sdata->u.ibss.ssid, 603469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->u.ibss.ssid_len)) 604469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 605469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 60634e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen /* same BSSID */ 607b203ca39126bad99583c908be587df067820a1eaJoe Perches if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) 60834e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen goto put_bss; 60934e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen 610f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen if (ieee80211_have_rx_timestamp(rx_status)) { 611f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen /* time when timestamp field was received */ 612f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen rx_timestamp = 613f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen ieee80211_calculate_rx_timestamp(local, rx_status, 614f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen len + FCS_LEN, 24); 6152448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } else { 6162448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* 6172448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * second best option: get current TSF 6182448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * (will return -1 if not supported) 6192448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg */ 62037a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller rx_timestamp = drv_get_tsf(local, sdata); 6212448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } 622469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 623bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 624bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", 625bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->bssid, 626bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)rx_timestamp, 627bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)beacon_timestamp, 628bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)(rx_timestamp - beacon_timestamp), 629bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg jiffies); 630469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 631469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (beacon_timestamp > rx_timestamp) { 632bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 633bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", 634bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->bssid); 635469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_join_ibss(sdata, bss); 6362103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); 63734e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 63852874a5e3917dde3b081521b014d6e4b226aacffAntonio Quartulli supp_rates); 6398bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 640469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 641469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 642469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg put_bss: 643469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 644469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 645469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6468bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergvoid ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, 6478bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg const u8 *bssid, const u8 *addr, 6488bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u32 supp_rates) 649469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 6502e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 651469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 652469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 65355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg struct ieee80211_chanctx_conf *chanctx_conf; 654b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan struct ieee80211_supported_band *sband; 65574608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich enum nl80211_bss_scan_width scan_width; 65655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg int band; 657469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 658af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* 659af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * XXX: Consider removing the least recently used entry and 660af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * allow new one to be added. 661af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg */ 662469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 663bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 664e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 6658bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 666469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 667469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6682e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) 6698bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 6702e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau 671b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) 6728bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 673469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 67455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_lock(); 67555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 67655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (WARN_ON_ONCE(!chanctx_conf)) { 67755de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 67855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return; 67955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg } 6804bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg band = chanctx_conf->def.chan->band; 68174608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); 68255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 68355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 6848bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); 685469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!sta) 6868bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 687469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 688c8716d9dc13c7f6ee92f2bfc6cc3b723b417bff8Rajkumar Manoharan sta->last_rx = jiffies; 689d9a7ddb05e5419ca5e4b54f57074dc33c7ea991cJohannes Berg 690469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* make sure mandatory rates are always added */ 691b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan sband = local->hw.wiphy->bands[band]; 692469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sta->sta.supp_rates[band] = supp_rates | 69374608aca4d82e2855b1a6a2cd60331d1a98f2d6aSimon Wunderlich ieee80211_mandatory_rates(sband, scan_width); 694469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6958bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock(&ifibss->incomplete_lock); 6968bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_add(&sta->list, &ifibss->incomplete_stations); 6978bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock(&ifibss->incomplete_lock); 6988bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 699469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 700469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 701469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) 702469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 703469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 704469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active = 0; 705469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 706469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7078d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 7087a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 709469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 710469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 711469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg list_for_each_entry_rcu(sta, &local->sta_list, list) { 712469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sta->sdata == sdata && 713469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, 714469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg jiffies)) { 715469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active++; 716469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 717469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 718469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 719469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 720469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_unlock(); 721469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 722469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return active; 723469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 724469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 725ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 726ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_JOINED 727ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 728469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 729469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) 730469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 731469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 7327ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich enum nl80211_bss_scan_width scan_width; 733469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7348d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 7357a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 736af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 737af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 738469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 739469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); 740af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 741450aae3d7b60a970f266349a837dfb30a539198bSujith if (time_before(jiffies, ifibss->last_scan_completed + 742450aae3d7b60a970f266349a837dfb30a539198bSujith IEEE80211_IBSS_MERGE_INTERVAL)) 743450aae3d7b60a970f266349a837dfb30a539198bSujith return; 744450aae3d7b60a970f266349a837dfb30a539198bSujith 745469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ieee80211_sta_active_ibss(sdata)) 746469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 747469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 748c037b8367c7e2b775a99d74037f5df014d2fbf06John W. Linville if (ifibss->fixed_channel) 749469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 750469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 751bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 752bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); 753469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7547ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); 75534bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, 7567ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich NULL, scan_width); 757469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 758469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 759af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) 760469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 761469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 762469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 bssid[ETH_ALEN]; 763469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 capability; 764469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int i; 765469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7668d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 7677a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 768af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) { 769469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(bssid, ifibss->bssid, ETH_ALEN); 770469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } else { 771469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Generate random, not broadcast, locally administered BSSID. Mix in 772469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * own MAC address to make sure that devices that do not have proper 773469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * random number generator get different BSSID. */ 774469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg get_random_bytes(bssid, ETH_ALEN); 775469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg for (i = 0; i < ETH_ALEN; i++) 77647846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg bssid[i] ^= sdata->vif.addr[i]; 777469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] &= ~0x01; 778469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] |= 0x02; 779469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 780469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 781bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); 782469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 783469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability = WLAN_CAPABILITY_IBSS; 784469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 785fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 786469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 787469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 788469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->drop_unencrypted = 0; 789469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 79057c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, 7913aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich ifibss->chandef.chan, ifibss->basic_rates, 792c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan capability, 0, true); 793469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 794469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 795ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 796ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_SEARCH 797ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 798ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault 799af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) 800469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 801469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 802469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 8030c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 804af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan = NULL; 805469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg const u8 *bssid = NULL; 8067ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich enum nl80211_bss_scan_width scan_width; 807469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active_ibss; 808e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg u16 capability; 809469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8108d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 8117a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 812469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active_ibss = ieee80211_sta_active_ibss(sdata); 813bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); 814469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 815469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (active_ibss) 816af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 817469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 818e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability = WLAN_CAPABILITY_IBSS; 819fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 820e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 821af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) 822af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg bssid = ifibss->bssid; 823af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_channel) 8243aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich chan = ifibss->chandef.chan; 825af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!is_zero_ether_addr(ifibss->bssid)) 826469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid = ifibss->bssid; 8270c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, 8280c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ifibss->ssid, ifibss->ssid_len, 8290c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, 8300c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg capability); 8310c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 8320c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (cbss) { 8330c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss; 834469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8350c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 836bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 837bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "sta_find_ibss: selected %pM current %pM\n", 838bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid, ifibss->bssid); 839bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 840bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "Selected IBSS BSSID %pM based on configured SSID\n", 841bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid); 842469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 843af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_sta_join_ibss(sdata, bss); 844469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 845af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 846d419b9f0fa69e79ccba3e5e79a58a52ae0c2ed6aReinette Chatre } 847469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 848bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); 849469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 850469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Selected IBSS not found in current scan results - try to scan */ 851ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault if (time_after(jiffies, ifibss->last_scan_completed + 852469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_SCAN_INTERVAL)) { 853bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); 854469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8557ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); 85634bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ieee80211_request_ibss_scan(sdata, ifibss->ssid, 8577ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich ifibss->ssid_len, chan, 8587ca15a0ae865067aac8d36e27e0acbe4a8f1e70aSimon Wunderlich scan_width); 859ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault } else { 860469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int interval = IEEE80211_SCAN_INTERVAL; 861469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 862469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (time_after(jiffies, ifibss->ibss_join_req + 86355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_IBSS_JOIN_TIMEOUT)) 86455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ieee80211_sta_create_ibss(sdata); 865469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 866af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 867af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + interval)); 868469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 869469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 870469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 871469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, 872c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct sk_buff *req) 873469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 874c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct ieee80211_mgmt *mgmt = (void *)req->data; 875469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 876469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 877c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg int tx_last_beacon, len = req->len; 878469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 879c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg struct beacon_data *presp; 880469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos, *end; 881469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8828d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_assert_lock(sdata); 8837a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 88440b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg presp = rcu_dereference_protected(ifibss->presp, 8858d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg lockdep_is_held(&sdata->wdev.mtx)); 88640b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg 887469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || 88840b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg len < 24 + 2 || !presp) 889469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 890469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8912448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg tx_last_beacon = drv_tx_last_beacon(local); 892469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 893bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 894bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", 895bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); 896469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8971ed76487ce115110171480deabd3cd4656f9803eFelix Fietkau if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) 898469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 899469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 900b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && 901888d04dfbe7e09f930fdaafb257cce2c54c9c3f3Felix Fietkau !is_broadcast_ether_addr(mgmt->bssid)) 902469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 903469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 904469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg end = ((u8 *) mgmt) + len; 905469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = mgmt->u.probe_req.variable; 906469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[0] != WLAN_EID_SSID || 907469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos + 2 + pos[1] > end) { 908bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", 909bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa); 910469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 911469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 912469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[1] != 0 && 913469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (pos[1] != ifibss->ssid_len || 9140da780c269957783d341fc3559e6b4c9912af7b4Benoit Papillault memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { 915469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Ignore ProbeReq for foreign SSID */ 916469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 917469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 918469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 919469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Reply with ProbeResp */ 920c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg skb = dev_alloc_skb(local->tx_headroom + presp->head_len); 921469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!skb) 922469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 923469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 924c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg skb_reserve(skb, local->tx_headroom); 925c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); 926c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 927c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); 928c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); 92962ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 93062ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg ieee80211_tx_skb(sdata, skb); 931469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 932469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 933d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbachstatic 934d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbachvoid ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, 935d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_mgmt *mgmt, size_t len, 936d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_rx_status *rx_status) 937469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 938469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t baselen; 939469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems elems; 940469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 941d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != 942d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach offsetof(typeof(mgmt->u.beacon), variable)); 943d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach 944d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach /* 945d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach * either beacon or probe_resp but the variable field is at the 946d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach * same offset 947d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach */ 948469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 949469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (baselen > len) 950469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 951469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 952469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 953b2e506bfc4d752b68a0ccaae1e977898263eba4cJohannes Berg false, &elems); 954469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 955d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 956469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 957469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9581fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 9591fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct sk_buff *skb) 960469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 961469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status; 962469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 963469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 fc; 964469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 965f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg rx_status = IEEE80211_SKB_RXCB(skb); 966469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 967469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg fc = le16_to_cpu(mgmt->frame_control); 968469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9698d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_lock(sdata); 9707a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 971c926d006c1514cfb3572893f41f2324e96823661Tim Harvey if (!sdata->u.ibss.ssid_len) 972c926d006c1514cfb3572893f41f2324e96823661Tim Harvey goto mgmt_out; /* not ready to merge yet */ 973c926d006c1514cfb3572893f41f2324e96823661Tim Harvey 974469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (fc & IEEE80211_FCTL_STYPE) { 975469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_REQ: 976c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg ieee80211_rx_mgmt_probe_req(sdata, skb); 977469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 978469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_RESP: 979469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_BEACON: 980d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, 981d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach rx_status); 982469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 983469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_AUTH: 984469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); 985469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 9862cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli case IEEE80211_STYPE_DEAUTH: 9872cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); 9882cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli break; 989469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 9907a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 991c926d006c1514cfb3572893f41f2324e96823661Tim Harvey mgmt_out: 9928d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_unlock(sdata); 993469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 994469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9951fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) 996469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 9971fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 9988bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 999469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 10008d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_lock(sdata); 10017a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 10027a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg /* 10037a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * Work could be scheduled after scan or similar 10047a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * when we aren't even joined (or trying) with a 10057a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * network. 10067a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg */ 10077a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg if (!ifibss->ssid_len) 10087a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg goto out; 1009469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 10108bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 10118bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 10128bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 10138bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 10148bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 10158bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 10168bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 101752874a5e3917dde3b081521b014d6e4b226aacffAntonio Quartulli ieee80211_ibss_finish_sta(sta); 10188bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 10198bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 10208bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 10218bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 10228bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 1023469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (ifibss->state) { 1024469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_SEARCH: 1025469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_find_ibss(sdata); 1026469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 1027469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_JOINED: 1028469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_merge_ibss(sdata); 1029469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 1030469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg default: 1031469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg WARN_ON(1); 1032469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 1033469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 1034469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 10357a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg out: 10368d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg sdata_unlock(sdata); 10373a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg} 10383a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg 1039469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_ibss_timer(unsigned long data) 1040469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1041469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_sub_if_data *sdata = 1042469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (struct ieee80211_sub_if_data *) data; 10435bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 1044a61829437e68c8b2036cf5005ed0e875451c9120Stanislaw Gruszka ieee80211_queue_work(&sdata->local->hw, &sdata->work); 10455bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 10465bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 1047469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) 1048469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1049469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 1050469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1051469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg setup_timer(&ifibss->timer, ieee80211_ibss_timer, 1052469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long) sdata); 10538bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg INIT_LIST_HEAD(&ifibss->incomplete_stations); 10548bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_init(&ifibss->incomplete_lock); 1055469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1056469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1057469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg/* scan finished notification */ 1058469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) 1059469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1060af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_sub_if_data *sdata; 1061469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 106229b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_lock(&local->iflist_mtx); 106329b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg list_for_each_entry(sdata, &local->interfaces, list) { 10649607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 10650e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg continue; 1066af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->vif.type != NL80211_IFTYPE_ADHOC) 1067af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg continue; 1068af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.last_scan_completed = jiffies; 10697a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 1070469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 107129b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_unlock(&local->iflist_mtx); 1072469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1073469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1074af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 1075af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct cfg80211_ibss_params *params) 1076af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 1077ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich u32 changed = 0; 10782103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich u32 rate_flags; 10792103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich struct ieee80211_supported_band *sband; 10802103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich int i; 1081af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1082af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->bssid) { 1083af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); 1084af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = true; 1085af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } else 1086af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = false; 1087af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1088fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg sdata->u.ibss.privacy = params->privacy; 1089267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sdata->u.ibss.control_port = params->control_port; 1090fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->u.ibss.basic_rates = params->basic_rates; 10912103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich 10922103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich /* fix basic_rates if channel does not support these rates */ 10932103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); 10942103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich sband = sdata->local->hw.wiphy->bands[params->chandef.chan->band]; 10952103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich for (i = 0; i < sband->n_bitrates; i++) { 10962103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 10972103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich sdata->u.ibss.basic_rates &= ~BIT(i); 10982103dec14792be2c2194a454630b01120d30e5cbSimon Wunderlich } 1099dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, 1100dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau sizeof(params->mcast_rate)); 1101fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg 110257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg sdata->vif.bss_conf.beacon_int = params->beacon_interval; 110357c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 11043aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich sdata->u.ibss.chandef = params->chandef; 1105af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_channel = params->channel_fixed; 1106af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1107af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->ie) { 1108af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, 1109af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg GFP_KERNEL); 1110af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->u.ibss.ie) 1111af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie_len = params->ie_len; 1112af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } 1113af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1114af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; 1115af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ibss_join_req = jiffies; 1116af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1117badecb001a310408d3473b1fc2ed5aefd0bc92a9Antonio Quartulli memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); 11180e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg sdata->u.ibss.ssid_len = params->ssid_len; 11190e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg 1120822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, 1121822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich sizeof(sdata->u.ibss.ht_capa)); 1122822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, 1123822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich sizeof(sdata->u.ibss.ht_capa_mask)); 1124822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich 1125ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich /* 1126ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is 1127ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * reserved, but an HT STA shall protect HT transmissions as though 1128ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * the HT Protection field were set to non-HT mixed mode. 1129ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 1130ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * In an IBSS, the RIFS Mode field of the HT Operation element is 1131ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * also reserved, but an HT STA shall operate as though this field 1132ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * were set to 1. 1133ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich */ 1134ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1135ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich sdata->vif.bss_conf.ht_operation_mode |= 1136ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED 1137ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich | IEEE80211_HT_PARAM_RIFS_MODE; 1138ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1139ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich changed |= BSS_CHANGED_HT; 1140ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich ieee80211_bss_info_change_notify(sdata, changed); 1141ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 114204ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg sdata->smps_mode = IEEE80211_SMPS_OFF; 114304ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg sdata->needed_rx_chains = sdata->local->rx_chains; 114404ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg 114564592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg ieee80211_queue_work(&sdata->local->hw, &sdata->work); 1146af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1147af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1148af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1149af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1150af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) 1151af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 11525ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 11535ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_local *local = sdata->local; 11545ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct cfg80211_bss *cbss; 11555ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi u16 capability; 11567a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg int active_ibss; 11578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 1158c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg struct beacon_data *presp; 11597a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 11605ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi active_ibss = ieee80211_sta_active_ibss(sdata); 11615ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11625ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { 11635ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability = WLAN_CAPABILITY_IBSS; 11645ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11655ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (ifibss->privacy) 11665ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability |= WLAN_CAPABILITY_PRIVACY; 11675ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11683aede78aad2a7e39a81b4b0caa771d40254a6787Simon Wunderlich cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, 11695ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->bssid, ifibss->ssid, 11705ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->ssid_len, WLAN_CAPABILITY_IBSS | 11715ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi WLAN_CAPABILITY_PRIVACY, 11725ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability); 11735ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11745ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (cbss) { 11755ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cfg80211_unlink_bss(local->hw.wiphy, cbss); 11765b112d3d098c97b867cc580f590395cd1e72f18cJohannes Berg cfg80211_put_bss(local->hw.wiphy, cbss); 11775ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 11785ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 1179af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1180b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich ifibss->state = IEEE80211_IBSS_MLME_SEARCH; 1181b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich memset(ifibss->bssid, 0, ETH_ALEN); 1182b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich ifibss->ssid_len = 0; 1183b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich 1184b998e8bb3e1c6eeae5eab9d6a434563270286c3bJohannes Berg sta_info_flush(sdata); 11858bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11868bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11878bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 11888bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 11898bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 11908bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 11918bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11928bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11938bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta_info_free(local, sta); 11948bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11958bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 11968bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11978bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 119886a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 1199af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1200af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* remove beacon */ 1201af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree(sdata->u.ibss.ie); 1202c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp = rcu_dereference_protected(ifibss->presp, 12038d61ffa5e01c5f676431d12caba17db164a48a86Johannes Berg lockdep_is_held(&sdata->wdev.mtx)); 1204a9b3cd7f323b2e57593e7215362a7b02fc933e3aStephen Hemminger RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); 1205822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich 1206822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich /* on the next join, re-program HT parameters */ 1207822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); 1208822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); 1209822854b0b1d8f893279ca717f3d084aa5fcd9ff5Simon Wunderlich 12108fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 1211c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = false; 1212d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg sdata->vif.bss_conf.enable_beacon = false; 12130ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak sdata->vif.bss_conf.ssid_len = 0; 1214d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 12158fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | 12168fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg BSS_CHANGED_IBSS); 1217af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 1218c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg kfree(presp); 1219af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 122035f20c14a103ca2c7062999e934a513b83d84de6Johannes Berg skb_queue_purge(&sdata->skb_queue); 12215cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 1222bc05d19f4b884b1dbbce48912710ae3f972c89d2Johannes Berg del_timer_sync(&sdata->u.ibss.timer); 12237a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 1224af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1225af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1226