ibss.c revision d6a83228823fc0cc8d79d95c9f0bf568b7317862
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; 46b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rates, i; 47469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 48469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 49469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos; 50469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_supported_band *sband; 51f446d10f214091408b7300f15c9adf60569edf28Johannes Berg struct cfg80211_bss *bss; 5257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg u32 bss_change; 53b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; 54683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg struct cfg80211_chan_def chandef; 552448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg 567a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 577a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 582448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* Reset own TSF to allow time synchronization work. */ 5937a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller drv_reset_tsf(local, sdata); 60469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 61af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb = ifibss->skb; 62a9b3cd7f323b2e57593e7215362a7b02fc933e3aStephen Hemminger RCU_INIT_POINTER(ifibss->presp, NULL); 63af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 64af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb->data = skb->head; 65af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb->len = 0; 66af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb_reset_tail_pointer(skb); 67af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb_reserve(skb, sdata->local->hw.extra_tx_headroom); 68469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 69b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(ifibss->bssid, bssid)) 70b998e8bb3e1c6eeae5eab9d6a434563270286c3bJohannes Berg sta_info_flush(sdata); 71469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7249b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg /* if merging, indicate to driver that we leave the old IBSS */ 7349b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg if (sdata->vif.bss_conf.ibss_joined) { 7449b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 75c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = false; 7686a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 7749b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS); 7849b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg } 7949b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg 80af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; 81469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 824bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg cfg80211_chandef_create(&chandef, chan, ifibss->channel_type); 834bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { 844bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg chandef.width = NL80211_CHAN_WIDTH_20; 854bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg chandef.center_freq1 = chan->center_freq; 864bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg } 8755de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 8855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ieee80211_vif_release_channel(sdata); 894bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (ieee80211_vif_use_channel(sdata, &chandef, 9055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ifibss->fixed_channel ? 9155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_CHANCTX_SHARED : 9255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_CHANCTX_EXCLUSIVE)) { 9355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg sdata_info(sdata, "Failed to join IBSS, no channel context\n"); 9455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return; 9513c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 9655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 9755de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg memcpy(ifibss->bssid, bssid, ETH_ALEN); 9857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 99af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sband = local->hw.wiphy->bands[chan->band]; 100469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 101b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg /* build supported rates array */ 102b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg pos = supp_rates; 103b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < sband->n_bitrates; i++) { 104b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rate = sband->bitrates[i].bitrate; 105b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 basic = 0; 106b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (basic_rates & BIT(i)) 107b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic = 0x80; 108b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg *pos++ = basic | (u8) (rate / 5); 109b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 110b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 111469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Build IBSS probe response */ 112af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mgmt = (void *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); 113469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); 114469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 115469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_STYPE_PROBE_RESP); 116e83e6541cee0a12bc445b0f4fad5214df5803087Johannes Berg eth_broadcast_addr(mgmt->da); 11747846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 118469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 11957c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); 120707c1b4e68a2811ff2c9e75750a98a3310789a2dSujith mgmt->u.beacon.timestamp = cpu_to_le64(tsf); 121469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->u.beacon.capab_info = cpu_to_le16(capability); 122469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 123469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + ifibss->ssid_len); 124469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SSID; 125469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = ifibss->ssid_len; 126469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, ifibss->ssid, ifibss->ssid_len); 127469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 128b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg rates = sband->n_bitrates; 129469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (rates > 8) 130469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rates = 8; 131469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + rates); 132469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SUPP_RATES; 133469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = rates; 134469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, supp_rates, rates); 135469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 136469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sband->band == IEEE80211_BAND_2GHZ) { 137469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + 1); 138469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_DS_PARAMS; 139469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 1; 140af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 141469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 142469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 143469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + 2); 144469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_IBSS_PARAMS; 145469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 2; 146469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* FIX: set ATIM window based on scan results */ 147469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 148469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 149469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 150b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (sband->n_bitrates > 8) { 151b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg rates = sband->n_bitrates - 8; 152469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + rates); 153469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_EXT_SUPP_RATES; 154469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = rates; 155469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, &supp_rates[8], rates); 156469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 157469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 158af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->ie_len) 159af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(skb_put(skb, ifibss->ie_len), 160af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ifibss->ie, ifibss->ie_len); 161af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 16213c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* add HT capability and information IEs */ 1634bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (chandef.width != NL80211_CHAN_WIDTH_20_NOHT && 164683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg sband->ht_cap.ht_supported) { 16513c40c54682ffe62977f670681268a26d500d6faAlexander Simon pos = skb_put(skb, 4 + 16613c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(struct ieee80211_ht_cap) + 167074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg sizeof(struct ieee80211_ht_operation)); 16813c40c54682ffe62977f670681268a26d500d6faAlexander Simon pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 16913c40c54682ffe62977f670681268a26d500d6faAlexander Simon sband->ht_cap.cap); 1700d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan /* 1710d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * Note: According to 802.11n-2009 9.13.3.1, HT Protection 1720d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * field and RIFS Mode are reserved in IBSS mode, therefore 1730d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * keep them at 0 1740d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan */ 175074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, 1764bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg &chandef, 0); 17713c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 17813c40c54682ffe62977f670681268a26d500d6faAlexander Simon 17932c5057b22a60b23353dda93c57e475856ca286cJohannes Berg if (local->hw.queues >= IEEE80211_NUM_ACS) { 1809eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf pos = skb_put(skb, 9); 1819eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = WLAN_EID_VENDOR_SPECIFIC; 1829eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 7; /* len */ 1839eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ 1849eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x50; 1859eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0xf2; 1869eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 2; /* WME */ 1879eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* WME info */ 1889eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 1; /* WME ver */ 1899eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* U-APSD no in use */ 1909eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 1919eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 192cf778b00e96df6d64f8e21b8395d1f8a859ecdc7Eric Dumazet rcu_assign_pointer(ifibss->presp, skb); 193469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 194d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg sdata->vif.bss_conf.enable_beacon = true; 1952d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg sdata->vif.bss_conf.beacon_int = beacon_int; 196fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->vif.bss_conf.basic_rates = basic_rates; 1972d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change = BSS_CHANGED_BEACON_INT; 1982d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= ieee80211_reset_erp_info(sdata); 1992d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BSSID; 2002d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON; 2012d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON_ENABLED; 202392cfdb10dab6c7dfa5fed18d8a44d7453d42196Teemu Paasikivi bss_change |= BSS_CHANGED_BASIC_RATES; 20313c40c54682ffe62977f670681268a26d500d6faAlexander Simon bss_change |= BSS_CHANGED_HT; 2048fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg bss_change |= BSS_CHANGED_IBSS; 2052f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich 2062f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich /* 2072f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * In 5 GHz/802.11a, we can always use short slot time. 2082f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * (IEEE 802.11-2012 18.3.8.7) 2092f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * 2102f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * In 2.4GHz, we must always use long slots in IBSS for compatibility 2112f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * reasons. 2122f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * (IEEE 802.11-2012 19.4.5) 2132f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * 2142f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * HT follows these specifications (IEEE 802.11-2012 20.3.18) 2152f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich */ 2162f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; 2172f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich bss_change |= BSS_CHANGED_ERP_SLOT; 2182f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich 2198fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = true; 220c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = creator; 2212d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg ieee80211_bss_info_change_notify(sdata, bss_change); 222469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 223b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); 224469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 225469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ifibss->state = IEEE80211_IBSS_MLME_JOINED; 226af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 227af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 228469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 229273686d664daae1aa728b76e45720273b26dd876Johannes Berg bss = cfg80211_inform_bss_frame(local->hw.wiphy, chan, 230f446d10f214091408b7300f15c9adf60569edf28Johannes Berg mgmt, skb->len, 0, GFP_KERNEL); 231f446d10f214091408b7300f15c9adf60569edf28Johannes Berg cfg80211_put_bss(bss); 23286a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_on(sdata->dev); 233af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); 234469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 235469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 236af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 237af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_bss *bss) 238469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 2390c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss = 2400c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg container_of((void *)bss, struct cfg80211_bss, priv); 241b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg struct ieee80211_supported_band *sband; 242b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u32 basic_rates; 243b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int i, j; 2440c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg u16 beacon_int = cbss->beacon_interval; 24557c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2467a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&sdata->u.ibss.mtx); 2477a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 24857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg if (beacon_int < 10) 24957c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int = 10; 25057c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2510c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; 252b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 253b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates = 0; 254b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 255b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < bss->supp_rates_len; i++) { 256b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rate = (bss->supp_rates[i] & 0x7f) * 5; 257b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg bool is_basic = !!(bss->supp_rates[i] & 0x80); 258b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 259b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (j = 0; j < sband->n_bitrates; j++) { 260b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (sband->bitrates[j].bitrate == rate) { 261b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (is_basic) 262b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates |= BIT(j); 263b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg break; 264b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 265b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 266b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 267b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 2680c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg __ieee80211_sta_join_ibss(sdata, cbss->bssid, 26957c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int, 2700c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->channel, 271b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates, 2720c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->capability, 273c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan cbss->tsf, 274c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan false); 275469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 276469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 2776d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartullistatic struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta, 2786d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli bool auth) 2798bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 2808bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 2818bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_sub_if_data *sdata = sta->sdata; 2828bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u8 addr[ETH_ALEN]; 2838bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2848bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg memcpy(addr, sta->sta.addr, ETH_ALEN); 2858bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 286bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); 2878bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 28883d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 28983d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 290267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli /* authorize the station only if the network is not RSN protected. If 291267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli * not wait for the userspace to authorize it */ 292267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli if (!sta->sdata->u.ibss.control_port) 293267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 2948bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2958bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rate_control_rate_init(sta); 2968bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2978bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* If it fails, maybe we raced another insertion? */ 2988bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (sta_info_insert_rcu(sta)) 2998bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta_info_get(sdata, addr); 300452a6d22615bb8262a932b362f41fc5d89f03293Will Hawkins if (auth && !sdata->u.ibss.auth_frame_registrations) { 301bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 302bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "TX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=1)\n", 3032514ec86531481713036081e93a353bbd02e542bSylvain Roger Rieunier sdata->vif.addr, addr, sdata->u.ibss.bssid); 304700e8ea6770df3113e735bcc76ecd6ffac71a13cJouni Malinen ieee80211_send_auth(sdata, 1, WLAN_AUTH_OPEN, 0, NULL, 0, 3056d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli addr, sdata->u.ibss.bssid, NULL, 0, 0); 3066d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli } 3078bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta; 3088bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 3098bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3108bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergstatic struct sta_info * 3118bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, 3128bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg const u8 *bssid, const u8 *addr, 3136d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli u32 supp_rates, bool auth) 3148bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 3158bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 3168bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3178bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_local *local = sdata->local; 3188bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 31955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg struct ieee80211_chanctx_conf *chanctx_conf; 32055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg int band; 3218bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3228bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* 3238bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * XXX: Consider removing the least recently used entry and 3248bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * allow new one to be added. 3258bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg */ 3268bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 327bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 328e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 3298bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3308bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3318bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3328bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3338bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { 3348bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3358bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3368bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3378bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 338b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { 3398bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3408bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3418bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3428bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 34355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_lock(); 34455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 34555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (WARN_ON_ONCE(!chanctx_conf)) 34655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return NULL; 3474bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg band = chanctx_conf->def.chan->band; 34855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 34955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 3508bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_KERNEL); 3518bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (!sta) { 3528bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3538bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3548bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3558bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3568bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->last_rx = jiffies; 3578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3588bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* make sure mandatory rates are always added */ 3598bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->sta.supp_rates[band] = supp_rates | 3608bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg ieee80211_mandatory_rates(local, band); 3618bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3626d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return ieee80211_ibss_finish_sta(sta, auth); 3636d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli} 3646d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3652cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartullistatic void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, 3662cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli struct ieee80211_mgmt *mgmt, 3672cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli size_t len) 3682cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli{ 3692cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); 3702cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 3712cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli if (len < IEEE80211_DEAUTH_FRAME_LEN) 3722cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli return; 3732cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 3742cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", 3752cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli mgmt->sa, mgmt->da, mgmt->bssid, reason); 3762cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli sta_info_destroy_addr(sdata, mgmt->sa); 3772cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli} 3782cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 3796d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartullistatic void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, 3806d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli struct ieee80211_mgmt *mgmt, 3816d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli size_t len) 3826d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli{ 3836d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli u16 auth_alg, auth_transaction; 3842cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli struct sta_info *sta; 3852cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli u8 deauth_frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3866d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3876d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli lockdep_assert_held(&sdata->u.ibss.mtx); 3886d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3896d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli if (len < 24 + 6) 3906d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return; 3916d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3926d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3936d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3946d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 395bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 396bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", 397bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); 3987bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli 3997bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) 4007bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli return; 4017bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli 4026d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli sta_info_destroy_addr(sdata, mgmt->sa); 4032cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 0, false); 4046d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli rcu_read_unlock(); 4056d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4066d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli /* 4072cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli * if we have any problem in allocating the new station, we reply with a 4082cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli * DEAUTH frame to tell the other end that we had a problem 4092cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli */ 4102cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli if (!sta) { 4112cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ieee80211_send_deauth_disassoc(sdata, sdata->u.ibss.bssid, 4122cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli IEEE80211_STYPE_DEAUTH, 4132cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli WLAN_REASON_UNSPECIFIED, true, 4142cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli deauth_frame_buf); 4152cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli return; 4162cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli } 4172cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 4182cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli /* 4196d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * IEEE 802.11 standard does not require authentication in IBSS 4206d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * networks and most implementations do not seem to use it. 4216d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * However, try to reply to authentication attempts if someone 4226d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * has actually implemented this. 4236d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli */ 424700e8ea6770df3113e735bcc76ecd6ffac71a13cJouni Malinen ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, 4256d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0); 4268bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 4278bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 428469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 429d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_mgmt *mgmt, size_t len, 430469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status, 431d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee802_11_elems *elems) 432469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 433469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 434469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int freq; 4350c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 436469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_bss *bss; 437469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 438469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_channel *channel; 439469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u64 beacon_timestamp, rx_timestamp; 440469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u32 supp_rates = 0; 441469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg enum ieee80211_band band = rx_status->band; 44213c40c54682ffe62977f670681268a26d500d6faAlexander Simon struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 44313c40c54682ffe62977f670681268a26d500d6faAlexander Simon bool rates_updated = false; 444469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 445469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ds_params && elems->ds_params_len == 1) 44659eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf freq = ieee80211_channel_to_frequency(elems->ds_params[0], 44759eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf band); 448469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 449469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg freq = rx_status->freq; 450469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 451469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg channel = ieee80211_get_channel(local->hw.wiphy, freq); 452469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 453469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 454469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 455469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4569eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 457b203ca39126bad99583c908be587df067820a1eaJoe Perches ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { 458469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 459469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 460abe60632f311d515b082b450504ee24006023951Johannes Berg sta = sta_info_get(sdata, mgmt->sa); 461469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4629eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (elems->supp_rates) { 4639eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf supp_rates = ieee80211_sta_get_rates(local, elems, 4649ebb61a23d90703344fc609fbee8da67b1e7456cAshok Nagarajan band, NULL); 4659eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta) { 4669eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf u32 prev_rates; 4679eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 4689eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf prev_rates = sta->sta.supp_rates[band]; 4699eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf /* make sure mandatory rates are always added */ 4709eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf sta->sta.supp_rates[band] = supp_rates | 4719eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf ieee80211_mandatory_rates(local, band); 472469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4739eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta->sta.supp_rates[band] != prev_rates) { 474bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 475bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", 476bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.addr, prev_rates, 477bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.supp_rates[band]); 47813c40c54682ffe62977f670681268a26d500d6faAlexander Simon rates_updated = true; 4799eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 4808bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } else { 4818bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 4829eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, 4836d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli mgmt->sa, supp_rates, true); 4848bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 48534e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg } 4869eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 4879eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta && elems->wmm_info) 488c2c98fdeb5c897499644eb247285c8e3dacc6450Johannes Berg set_sta_flag(sta, WLAN_STA_WME); 4899eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 490074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg if (sta && elems->ht_operation && elems->ht_cap_elem && 49113c40c54682ffe62977f670681268a26d500d6faAlexander Simon sdata->u.ibss.channel_type != NL80211_CHAN_NO_HT) { 49213c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* we both use HT */ 49313c40c54682ffe62977f670681268a26d500d6faAlexander Simon struct ieee80211_sta_ht_cap sta_ht_cap_new; 4944bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg struct cfg80211_chan_def chandef; 4954bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg 4964bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg ieee80211_ht_oper_to_chandef(channel, 4974bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg elems->ht_operation, 4984bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg &chandef); 49913c40c54682ffe62977f670681268a26d500d6faAlexander Simon 50013c40c54682ffe62977f670681268a26d500d6faAlexander Simon ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 50113c40c54682ffe62977f670681268a26d500d6faAlexander Simon elems->ht_cap_elem, 50213c40c54682ffe62977f670681268a26d500d6faAlexander Simon &sta_ht_cap_new); 50313c40c54682ffe62977f670681268a26d500d6faAlexander Simon 50413c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* 50513c40c54682ffe62977f670681268a26d500d6faAlexander Simon * fall back to HT20 if we don't use or use 50613c40c54682ffe62977f670681268a26d500d6faAlexander Simon * the other extension channel 50713c40c54682ffe62977f670681268a26d500d6faAlexander Simon */ 5084bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (chandef.width != NL80211_CHAN_WIDTH_40 || 5094bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg cfg80211_get_chandef_type(&chandef) != 5104bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg sdata->u.ibss.channel_type) 51113c40c54682ffe62977f670681268a26d500d6faAlexander Simon sta_ht_cap_new.cap &= 51213c40c54682ffe62977f670681268a26d500d6faAlexander Simon ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 51313c40c54682ffe62977f670681268a26d500d6faAlexander Simon 51413c40c54682ffe62977f670681268a26d500d6faAlexander Simon if (memcmp(&sta->sta.ht_cap, &sta_ht_cap_new, 51513c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(sta_ht_cap_new))) { 51613c40c54682ffe62977f670681268a26d500d6faAlexander Simon memcpy(&sta->sta.ht_cap, &sta_ht_cap_new, 51713c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(sta_ht_cap_new)); 51813c40c54682ffe62977f670681268a26d500d6faAlexander Simon rates_updated = true; 51913c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 52013c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 52113c40c54682ffe62977f670681268a26d500d6faAlexander Simon 522e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli if (sta && rates_updated) { 523e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli drv_sta_rc_update(local, sdata, &sta->sta, 524e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli IEEE80211_RC_SUPP_RATES_CHANGED); 52513c40c54682ffe62977f670681268a26d500d6faAlexander Simon rate_control_rate_init(sta); 526e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli } 52713c40c54682ffe62977f670681268a26d500d6faAlexander Simon 5289eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf rcu_read_unlock(); 529469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 530469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 531469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 532d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach channel); 533469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!bss) 534469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 535469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5360c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = container_of((void *)bss, struct cfg80211_bss, priv); 5370c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 538469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* was just updated in ieee80211_bss_info_update */ 5390c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg beacon_timestamp = cbss->tsf; 540469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 541469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* check if we need to merge IBSS */ 542469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 543469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* we use a fixed BSSID */ 544a98bfec2985221d8e0904a526cbe88590eaad2a6Benoit Papillault if (sdata->u.ibss.fixed_bssid) 545469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 546469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 547469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* not an IBSS */ 5480c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) 549469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 550469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 551469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different channel */ 55255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (sdata->u.ibss.fixed_channel && 55355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg sdata->u.ibss.channel != cbss->channel) 554469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 555469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 556469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different SSID */ 557469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ssid_len != sdata->u.ibss.ssid_len || 558469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcmp(elems->ssid, sdata->u.ibss.ssid, 559469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->u.ibss.ssid_len)) 560469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 561469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 56234e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen /* same BSSID */ 563b203ca39126bad99583c908be587df067820a1eaJoe Perches if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) 56434e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen goto put_bss; 56534e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen 566f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen if (ieee80211_have_rx_timestamp(rx_status)) { 567f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen /* time when timestamp field was received */ 568f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen rx_timestamp = 569f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen ieee80211_calculate_rx_timestamp(local, rx_status, 570f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen len + FCS_LEN, 24); 5712448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } else { 5722448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* 5732448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * second best option: get current TSF 5742448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * (will return -1 if not supported) 5752448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg */ 57637a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller rx_timestamp = drv_get_tsf(local, sdata); 5772448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } 578469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 579bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 580bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", 581bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->bssid, 582bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)rx_timestamp, 583bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)beacon_timestamp, 584bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)(rx_timestamp - beacon_timestamp), 585bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg jiffies); 586469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 587469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (beacon_timestamp > rx_timestamp) { 588bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 589bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", 590bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->bssid); 591469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_join_ibss(sdata, bss); 5929ebb61a23d90703344fc609fbee8da67b1e7456cAshok Nagarajan supp_rates = ieee80211_sta_get_rates(local, elems, band, NULL); 59334e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 5946d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli supp_rates, true); 5958bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 596469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 597469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 598469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg put_bss: 599469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 600469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 601469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6028bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergvoid ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, 6038bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg const u8 *bssid, const u8 *addr, 6048bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u32 supp_rates) 605469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 6062e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 607469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 608469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 60955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg struct ieee80211_chanctx_conf *chanctx_conf; 61055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg int band; 611469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 612af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* 613af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * XXX: Consider removing the least recently used entry and 614af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * allow new one to be added. 615af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg */ 616469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 617bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 618e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 6198bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 620469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 621469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6222e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) 6238bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 6242e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau 625b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) 6268bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 627469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 62855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_lock(); 62955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 63055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (WARN_ON_ONCE(!chanctx_conf)) { 63155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 63255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return; 63355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg } 6344bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg band = chanctx_conf->def.chan->band; 63555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 63655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 6378bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); 638469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!sta) 6398bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 640469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 641c8716d9dc13c7f6ee92f2bfc6cc3b723b417bff8Rajkumar Manoharan sta->last_rx = jiffies; 642d9a7ddb05e5419ca5e4b54f57074dc33c7ea991cJohannes Berg 643469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* make sure mandatory rates are always added */ 644469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sta->sta.supp_rates[band] = supp_rates | 645469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_mandatory_rates(local, band); 646469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6478bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock(&ifibss->incomplete_lock); 6488bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_add(&sta->list, &ifibss->incomplete_stations); 6498bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock(&ifibss->incomplete_lock); 6508bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 651469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 652469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 653469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) 654469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 655469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 656469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active = 0; 657469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 658469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6597a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&sdata->u.ibss.mtx); 6607a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 661469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 662469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 663469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg list_for_each_entry_rcu(sta, &local->sta_list, list) { 664469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sta->sdata == sdata && 665469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, 666469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg jiffies)) { 667469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active++; 668469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 669469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 670469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 671469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 672469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_unlock(); 673469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 674469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return active; 675469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 676469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 677ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 678ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_JOINED 679ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 680469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 681469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) 682469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 683469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 684469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6857a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 6867a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 687af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 688af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 689469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 690469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); 691af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 692450aae3d7b60a970f266349a837dfb30a539198bSujith if (time_before(jiffies, ifibss->last_scan_completed + 693450aae3d7b60a970f266349a837dfb30a539198bSujith IEEE80211_IBSS_MERGE_INTERVAL)) 694450aae3d7b60a970f266349a837dfb30a539198bSujith return; 695450aae3d7b60a970f266349a837dfb30a539198bSujith 696469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ieee80211_sta_active_ibss(sdata)) 697469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 698469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 699c037b8367c7e2b775a99d74037f5df014d2fbf06John W. Linville if (ifibss->fixed_channel) 700469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 701469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 702bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 703bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); 704469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 70534bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, 70634bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka NULL); 707469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 708469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 709af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) 710469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 711469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 712469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 bssid[ETH_ALEN]; 713469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 capability; 714469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int i; 715469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7167a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 7177a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 718af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) { 719469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(bssid, ifibss->bssid, ETH_ALEN); 720469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } else { 721469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Generate random, not broadcast, locally administered BSSID. Mix in 722469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * own MAC address to make sure that devices that do not have proper 723469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * random number generator get different BSSID. */ 724469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg get_random_bytes(bssid, ETH_ALEN); 725469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg for (i = 0; i < ETH_ALEN; i++) 72647846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg bssid[i] ^= sdata->vif.addr[i]; 727469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] &= ~0x01; 728469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] |= 0x02; 729469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 730469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 731bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); 732469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 733469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability = WLAN_CAPABILITY_IBSS; 734469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 735fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 736469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 737469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 738469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->drop_unencrypted = 0; 739469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 74057c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, 741fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi ifibss->channel, ifibss->basic_rates, 742c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan capability, 0, true); 743469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 744469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 745ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 746ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_SEARCH 747ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 748ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault 749af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) 750469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 751469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 752469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 7530c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 754af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan = NULL; 755469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg const u8 *bssid = NULL; 756469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active_ibss; 757e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg u16 capability; 758469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7597a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 7607a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 761469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active_ibss = ieee80211_sta_active_ibss(sdata); 762bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); 763469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 764469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (active_ibss) 765af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 766469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 767e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability = WLAN_CAPABILITY_IBSS; 768fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 769e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 770af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) 771af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg bssid = ifibss->bssid; 772af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_channel) 773af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg chan = ifibss->channel; 774af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!is_zero_ether_addr(ifibss->bssid)) 775469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid = ifibss->bssid; 7760c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, 7770c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ifibss->ssid, ifibss->ssid_len, 7780c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, 7790c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg capability); 7800c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 7810c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (cbss) { 7820c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss; 783469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7840c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 785bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 786bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "sta_find_ibss: selected %pM current %pM\n", 787bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid, ifibss->bssid); 788bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 789bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "Selected IBSS BSSID %pM based on configured SSID\n", 790bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid); 791469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 792af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_sta_join_ibss(sdata, bss); 793469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 794af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 795d419b9f0fa69e79ccba3e5e79a58a52ae0c2ed6aReinette Chatre } 796469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 797bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); 798469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 799469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Selected IBSS not found in current scan results - try to scan */ 800ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault if (time_after(jiffies, ifibss->last_scan_completed + 801469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_SCAN_INTERVAL)) { 802bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); 803469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 80434bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ieee80211_request_ibss_scan(sdata, ifibss->ssid, 80534bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ifibss->ssid_len, chan); 806ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault } else { 807469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int interval = IEEE80211_SCAN_INTERVAL; 808469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 809469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (time_after(jiffies, ifibss->ibss_join_req + 81055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_IBSS_JOIN_TIMEOUT)) 81155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ieee80211_sta_create_ibss(sdata); 812469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 813af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 814af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + interval)); 815469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 816469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 817469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 818469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, 819c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct sk_buff *req) 820469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 821c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct ieee80211_mgmt *mgmt = (void *)req->data; 822469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 823469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 824c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg int tx_last_beacon, len = req->len; 825469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 826469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *resp; 82740b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg struct sk_buff *presp; 828469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos, *end; 829469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8307a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 8317a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 83240b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg presp = rcu_dereference_protected(ifibss->presp, 83340b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg lockdep_is_held(&ifibss->mtx)); 83440b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg 835469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || 83640b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg len < 24 + 2 || !presp) 837469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 838469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8392448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg tx_last_beacon = drv_tx_last_beacon(local); 840469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 841bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 842bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", 843bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); 844469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8451ed76487ce115110171480deabd3cd4656f9803eFelix Fietkau if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) 846469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 847469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 848b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && 849888d04dfbe7e09f930fdaafb257cce2c54c9c3f3Felix Fietkau !is_broadcast_ether_addr(mgmt->bssid)) 850469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 851469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 852469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg end = ((u8 *) mgmt) + len; 853469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = mgmt->u.probe_req.variable; 854469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[0] != WLAN_EID_SSID || 855469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos + 2 + pos[1] > end) { 856bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", 857bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa); 858469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 859469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 860469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[1] != 0 && 861469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (pos[1] != ifibss->ssid_len || 8620da780c269957783d341fc3559e6b4c9912af7b4Benoit Papillault memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { 863469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Ignore ProbeReq for foreign SSID */ 864469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 865469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 866469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 867469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Reply with ProbeResp */ 86840b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg skb = skb_copy(presp, GFP_KERNEL); 869469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!skb) 870469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 871469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 872469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg resp = (struct ieee80211_mgmt *) skb->data; 873469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(resp->da, mgmt->sa, ETH_ALEN); 874bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Sending ProbeResp to %pM\n", resp->da); 87562ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 87662ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg ieee80211_tx_skb(sdata, skb); 877469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 878469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 879d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbachstatic 880d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbachvoid ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, 881d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_mgmt *mgmt, size_t len, 882d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_rx_status *rx_status) 883469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 884469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t baselen; 885469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems elems; 886469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 887d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != 888d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach offsetof(typeof(mgmt->u.beacon), variable)); 889d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach 890d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach /* 891d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach * either beacon or probe_resp but the variable field is at the 892d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach * same offset 893d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach */ 894469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 895469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (baselen > len) 896469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 897469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 898469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 899469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg &elems); 900469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 901d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 902469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 903469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9041fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 9051fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct sk_buff *skb) 906469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 907469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status; 908469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 909469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 fc; 910469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 911f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg rx_status = IEEE80211_SKB_RXCB(skb); 912469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 913469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg fc = le16_to_cpu(mgmt->frame_control); 914469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9157a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 9167a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 917c926d006c1514cfb3572893f41f2324e96823661Tim Harvey if (!sdata->u.ibss.ssid_len) 918c926d006c1514cfb3572893f41f2324e96823661Tim Harvey goto mgmt_out; /* not ready to merge yet */ 919c926d006c1514cfb3572893f41f2324e96823661Tim Harvey 920469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (fc & IEEE80211_FCTL_STYPE) { 921469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_REQ: 922c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg ieee80211_rx_mgmt_probe_req(sdata, skb); 923469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 924469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_RESP: 925469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_BEACON: 926d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, 927d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach rx_status); 928469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 929469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_AUTH: 930469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); 931469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 9322cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli case IEEE80211_STYPE_DEAUTH: 9332cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); 9342cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli break; 935469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 9367a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 937c926d006c1514cfb3572893f41f2324e96823661Tim Harvey mgmt_out: 9387a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&sdata->u.ibss.mtx); 939469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 940469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9411fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) 942469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 9431fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 9448bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 945469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9467a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&ifibss->mtx); 9477a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 9487a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg /* 9497a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * Work could be scheduled after scan or similar 9507a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * when we aren't even joined (or trying) with a 9517a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * network. 9527a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg */ 9537a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg if (!ifibss->ssid_len) 9547a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg goto out; 955469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9568bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 9578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 9588bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 9598bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 9608bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 9618bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 9628bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 9636d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli ieee80211_ibss_finish_sta(sta, true); 9648bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 9658bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 9668bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 9678bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 9688bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 969469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (ifibss->state) { 970469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_SEARCH: 971469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_find_ibss(sdata); 972469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 973469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_JOINED: 974469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_merge_ibss(sdata); 975469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 976469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg default: 977469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg WARN_ON(1); 978469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 979469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 980469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9817a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg out: 9827a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&ifibss->mtx); 9833a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg} 9843a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg 985469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_ibss_timer(unsigned long data) 986469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 987469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_sub_if_data *sdata = 988469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (struct ieee80211_sub_if_data *) data; 989469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 990469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 991469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9925bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (local->quiescing) { 9935bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = true; 9945bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg return; 9955bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg } 9965bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 9977a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 998469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 999469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 10005bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg#ifdef CONFIG_PM 10015bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata) 10025bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 10035bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 10045bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 10055bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (del_timer_sync(&ifibss->timer)) 10065bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = true; 10075bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 10085bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 10095bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata) 10105bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 10115bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 10125bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 10135bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (ifibss->timer_running) { 10145bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg add_timer(&ifibss->timer); 10155bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = false; 10165bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg } 10175bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 10185bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg#endif 10195bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 1020469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) 1021469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1022469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 1023469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1024469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg setup_timer(&ifibss->timer, ieee80211_ibss_timer, 1025469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long) sdata); 10267a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_init(&ifibss->mtx); 10278bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg INIT_LIST_HEAD(&ifibss->incomplete_stations); 10288bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_init(&ifibss->incomplete_lock); 1029469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1030469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1031469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg/* scan finished notification */ 1032469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) 1033469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1034af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_sub_if_data *sdata; 1035469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 103629b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_lock(&local->iflist_mtx); 103729b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg list_for_each_entry(sdata, &local->interfaces, list) { 10389607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 10390e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg continue; 1040af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->vif.type != NL80211_IFTYPE_ADHOC) 1041af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg continue; 1042af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.last_scan_completed = jiffies; 10437a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 1044469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 104529b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_unlock(&local->iflist_mtx); 1046469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1047469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1048af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 1049af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct cfg80211_ibss_params *params) 1050af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 1051af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct sk_buff *skb; 1052ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich u32 changed = 0; 1053af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 10547a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + 105513c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(struct ieee80211_hdr_3addr) + 105613c40c54682ffe62977f670681268a26d500d6faAlexander Simon 12 /* struct ieee80211_mgmt.u.beacon */ + 105713c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + 105813c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + 8 /* max Supported Rates */ + 105913c40c54682ffe62977f670681268a26d500d6faAlexander Simon 3 /* max DS params */ + 106013c40c54682ffe62977f670681268a26d500d6faAlexander Simon 4 /* IBSS params */ + 106113c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 106213c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + sizeof(struct ieee80211_ht_cap) + 1063074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg 2 + sizeof(struct ieee80211_ht_operation) + 10647a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg params->ie_len); 10657a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg if (!skb) 10667a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg return -ENOMEM; 10677a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 10687a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 10697a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 1070af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->bssid) { 1071af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); 1072af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = true; 1073af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } else 1074af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = false; 1075af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1076fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg sdata->u.ibss.privacy = params->privacy; 1077267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sdata->u.ibss.control_port = params->control_port; 1078fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->u.ibss.basic_rates = params->basic_rates; 1079dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, 1080dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau sizeof(params->mcast_rate)); 1081fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg 108257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg sdata->vif.bss_conf.beacon_int = params->beacon_interval; 108357c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 1084683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg sdata->u.ibss.channel = params->chandef.chan; 1085683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg sdata->u.ibss.channel_type = 1086683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg cfg80211_get_chandef_type(¶ms->chandef); 1087af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_channel = params->channel_fixed; 1088af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1089af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->ie) { 1090af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, 1091af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg GFP_KERNEL); 1092af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->u.ibss.ie) 1093af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie_len = params->ie_len; 1094af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } 1095af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1096af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.skb = skb; 1097af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; 1098af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ibss_join_req = jiffies; 1099af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1100badecb001a310408d3473b1fc2ed5aefd0bc92a9Antonio Quartulli memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); 11010e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg sdata->u.ibss.ssid_len = params->ssid_len; 11020e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg 11037da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_unlock(&sdata->u.ibss.mtx); 11047da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg 11057da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_lock(&sdata->local->mtx); 11065cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(sdata->local); 11077da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_unlock(&sdata->local->mtx); 11085cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 1109ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich /* 1110ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is 1111ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * reserved, but an HT STA shall protect HT transmissions as though 1112ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * the HT Protection field were set to non-HT mixed mode. 1113ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 1114ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * In an IBSS, the RIFS Mode field of the HT Operation element is 1115ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * also reserved, but an HT STA shall operate as though this field 1116ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * were set to 1. 1117ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich */ 1118ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1119ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich sdata->vif.bss_conf.ht_operation_mode |= 1120ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED 1121ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich | IEEE80211_HT_PARAM_RIFS_MODE; 1122ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1123ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich changed |= BSS_CHANGED_HT; 1124ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich ieee80211_bss_info_change_notify(sdata, changed); 1125ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 112604ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg sdata->smps_mode = IEEE80211_SMPS_OFF; 112704ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg sdata->needed_rx_chains = sdata->local->rx_chains; 112804ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg 112964592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg ieee80211_queue_work(&sdata->local->hw, &sdata->work); 1130af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1131af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1132af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1133af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1134af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) 1135af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 1136af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct sk_buff *skb; 11375ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 11385ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_local *local = sdata->local; 11395ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct cfg80211_bss *cbss; 11405ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi u16 capability; 11417a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg int active_ibss; 11428bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 11437a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 11447a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 11455ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11465ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi active_ibss = ieee80211_sta_active_ibss(sdata); 11475ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11485ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { 11495ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability = WLAN_CAPABILITY_IBSS; 11505ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11515ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (ifibss->privacy) 11525ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability |= WLAN_CAPABILITY_PRIVACY; 11535ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11545ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel, 11555ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->bssid, ifibss->ssid, 11565ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->ssid_len, WLAN_CAPABILITY_IBSS | 11575ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi WLAN_CAPABILITY_PRIVACY, 11585ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability); 11595ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11605ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (cbss) { 11615ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cfg80211_unlink_bss(local->hw.wiphy, cbss); 11625ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cfg80211_put_bss(cbss); 11635ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 11645ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 1165af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1166b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich ifibss->state = IEEE80211_IBSS_MLME_SEARCH; 1167b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich memset(ifibss->bssid, 0, ETH_ALEN); 1168b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich ifibss->ssid_len = 0; 1169b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich 1170b998e8bb3e1c6eeae5eab9d6a434563270286c3bJohannes Berg sta_info_flush(sdata); 11718bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11728bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11738bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 11748bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 11758bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 11768bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 11778bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11788bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11798bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta_info_free(local, sta); 11808bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11818bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 11828bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11838bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 118486a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 1185af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1186af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* remove beacon */ 1187af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree(sdata->u.ibss.ie); 118840b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg skb = rcu_dereference_protected(sdata->u.ibss.presp, 118940b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg lockdep_is_held(&sdata->u.ibss.mtx)); 1190a9b3cd7f323b2e57593e7215362a7b02fc933e3aStephen Hemminger RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); 11918fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 1192c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = false; 1193d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg sdata->vif.bss_conf.enable_beacon = false; 1194d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 11958fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | 11968fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg BSS_CHANGED_IBSS); 1197af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 1198af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree_skb(skb); 1199af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 120035f20c14a103ca2c7062999e934a513b83d84de6Johannes Berg skb_queue_purge(&sdata->skb_queue); 12015cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 1202bc05d19f4b884b1dbbce48912710ae3f972c89d2Johannes Berg del_timer_sync(&sdata->u.ibss.timer); 12037a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 12047a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&sdata->u.ibss.mtx); 1205bc05d19f4b884b1dbbce48912710ae3f972c89d2Johannes Berg 12067da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_lock(&local->mtx); 12075cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(sdata->local); 12087da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_unlock(&local->mtx); 1209af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1210af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1211af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1212