ibss.c revision b422c6cd7e93bb613030f14d7d8a0cc73f115629
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 ieee80211_mgmt *mgmt; 48469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos; 49469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_supported_band *sband; 50f446d10f214091408b7300f15c9adf60569edf28Johannes Berg struct cfg80211_bss *bss; 5157c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg u32 bss_change; 52b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; 53683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg struct cfg80211_chan_def chandef; 54c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg struct beacon_data *presp; 55c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg int frame_len; 562448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg 577a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 587a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 592448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* Reset own TSF to allow time synchronization work. */ 6037a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller drv_reset_tsf(local, sdata); 61469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 62b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(ifibss->bssid, bssid)) 63b998e8bb3e1c6eeae5eab9d6a434563270286c3bJohannes Berg sta_info_flush(sdata); 64469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6549b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg /* if merging, indicate to driver that we leave the old IBSS */ 6649b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg if (sdata->vif.bss_conf.ibss_joined) { 6749b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 68c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = false; 691852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg sdata->vif.bss_conf.enable_beacon = false; 7086a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 711852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg ieee80211_bss_info_change_notify(sdata, 721852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg BSS_CHANGED_IBSS | 731852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg BSS_CHANGED_BEACON_ENABLED); 7449b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg } 7549b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg 76c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp = rcu_dereference_protected(ifibss->presp, 77c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg lockdep_is_held(&ifibss->mtx)); 78c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg rcu_assign_pointer(ifibss->presp, NULL); 79c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (presp) 80c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg kfree_rcu(presp, rcu_head); 811852d40eaba36fe1e97e0e497ffce291c99f5886Johannes Berg 82af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; 83469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 844bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg cfg80211_chandef_create(&chandef, chan, ifibss->channel_type); 854bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { 864bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg chandef.width = NL80211_CHAN_WIDTH_20; 874bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg chandef.center_freq1 = chan->center_freq; 884bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg } 8955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 9055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ieee80211_vif_release_channel(sdata); 914bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (ieee80211_vif_use_channel(sdata, &chandef, 9255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ifibss->fixed_channel ? 9355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_CHANCTX_SHARED : 9455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_CHANCTX_EXCLUSIVE)) { 9555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg sdata_info(sdata, "Failed to join IBSS, no channel context\n"); 9655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return; 9713c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 9855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 9955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg memcpy(ifibss->bssid, bssid, ETH_ALEN); 10057c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 101af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sband = local->hw.wiphy->bands[chan->band]; 102469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 103469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Build IBSS probe response */ 104c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg frame_len = sizeof(struct ieee80211_hdr_3addr) + 105c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 12 /* struct ieee80211_mgmt.u.beacon */ + 106c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + 107c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + 8 /* max Supported Rates */ + 108c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 3 /* max DS params */ + 109c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 4 /* IBSS params */ + 110c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 111c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + sizeof(struct ieee80211_ht_cap) + 112c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 2 + sizeof(struct ieee80211_ht_operation) + 113c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg ifibss->ie_len; 114c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); 115c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (!presp) 116c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg return; 117c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 118c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp->head = (void *)(presp + 1); 119c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 120c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg mgmt = (void *) presp->head; 121469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 122469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_STYPE_PROBE_RESP); 123e83e6541cee0a12bc445b0f4fad5214df5803087Johannes Berg eth_broadcast_addr(mgmt->da); 12447846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 125469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 12657c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); 127707c1b4e68a2811ff2c9e75750a98a3310789a2dSujith mgmt->u.beacon.timestamp = cpu_to_le64(tsf); 128469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->u.beacon.capab_info = cpu_to_le16(capability); 129469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 130c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); 131c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 132469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SSID; 133469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = ifibss->ssid_len; 134469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, ifibss->ssid, ifibss->ssid_len); 135c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg pos += ifibss->ssid_len; 136469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 137c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg rates = min_t(int, 8, sband->n_bitrates); 138469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SUPP_RATES; 139469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = rates; 140c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg for (i = 0; i < rates; i++) { 141c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg int rate = sband->bitrates[i].bitrate; 142c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg u8 basic = 0; 143c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (basic_rates & BIT(i)) 144c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg basic = 0x80; 145c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg *pos++ = basic | (u8) (rate / 5); 146c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg } 147469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 148469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sband->band == IEEE80211_BAND_2GHZ) { 149469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_DS_PARAMS; 150469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 1; 151af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 152469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 153469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 154469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_IBSS_PARAMS; 155469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 2; 156469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* FIX: set ATIM window based on scan results */ 157469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 158469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 159469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 160b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (sband->n_bitrates > 8) { 161469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_EXT_SUPP_RATES; 162c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg *pos++ = sband->n_bitrates - 8; 163c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg for (i = 8; i < sband->n_bitrates; i++) { 164c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg int rate = sband->bitrates[i].bitrate; 165c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg u8 basic = 0; 166c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (basic_rates & BIT(i)) 167c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg basic = 0x80; 168c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg *pos++ = basic | (u8) (rate / 5); 169c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg } 170469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 171469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 172c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (ifibss->ie_len) { 173c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg memcpy(pos, ifibss->ie, ifibss->ie_len); 174c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg pos += ifibss->ie_len; 175c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg } 176af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 17713c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* add HT capability and information IEs */ 1784bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg if (chandef.width != NL80211_CHAN_WIDTH_20_NOHT && 179683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg sband->ht_cap.ht_supported) { 18013c40c54682ffe62977f670681268a26d500d6faAlexander Simon pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 18113c40c54682ffe62977f670681268a26d500d6faAlexander Simon sband->ht_cap.cap); 1820d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan /* 1830d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * Note: According to 802.11n-2009 9.13.3.1, HT Protection 1840d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * field and RIFS Mode are reserved in IBSS mode, therefore 1850d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * keep them at 0 1860d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan */ 187074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, 1884bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg &chandef, 0); 18913c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 19013c40c54682ffe62977f670681268a26d500d6faAlexander Simon 19132c5057b22a60b23353dda93c57e475856ca286cJohannes Berg if (local->hw.queues >= IEEE80211_NUM_ACS) { 1929eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = WLAN_EID_VENDOR_SPECIFIC; 1939eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 7; /* len */ 1949eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ 1959eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x50; 1969eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0xf2; 1979eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 2; /* WME */ 1989eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* WME info */ 1999eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 1; /* WME ver */ 2009eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* U-APSD no in use */ 2019eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 2029eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 203c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp->head_len = pos - presp->head; 204c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg if (WARN_ON(presp->head_len > frame_len)) 205c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg return; 206c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 207c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg rcu_assign_pointer(ifibss->presp, presp); 208469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 209d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg sdata->vif.bss_conf.enable_beacon = true; 2102d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg sdata->vif.bss_conf.beacon_int = beacon_int; 211fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->vif.bss_conf.basic_rates = basic_rates; 2120ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; 2130ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); 2142d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change = BSS_CHANGED_BEACON_INT; 2152d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= ieee80211_reset_erp_info(sdata); 2162d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BSSID; 2172d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON; 2182d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON_ENABLED; 219392cfdb10dab6c7dfa5fed18d8a44d7453d42196Teemu Paasikivi bss_change |= BSS_CHANGED_BASIC_RATES; 22013c40c54682ffe62977f670681268a26d500d6faAlexander Simon bss_change |= BSS_CHANGED_HT; 2218fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg bss_change |= BSS_CHANGED_IBSS; 2220ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak bss_change |= BSS_CHANGED_SSID; 2232f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich 2242f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich /* 2252f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * In 5 GHz/802.11a, we can always use short slot time. 2262f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * (IEEE 802.11-2012 18.3.8.7) 2272f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * 2282f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * In 2.4GHz, we must always use long slots in IBSS for compatibility 2292f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * reasons. 2302f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * (IEEE 802.11-2012 19.4.5) 2312f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * 2322f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich * HT follows these specifications (IEEE 802.11-2012 20.3.18) 2332f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich */ 2342f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; 2352f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich bss_change |= BSS_CHANGED_ERP_SLOT; 2362f91a96799d155d56a0663dbe00fc45c6721a763Simon Wunderlich 2378fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = true; 238c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = creator; 2392d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg ieee80211_bss_info_change_notify(sdata, bss_change); 240469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 241b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); 242469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 243469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ifibss->state = IEEE80211_IBSS_MLME_JOINED; 244af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 245af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 246469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 247273686d664daae1aa728b76e45720273b26dd876Johannes Berg bss = cfg80211_inform_bss_frame(local->hw.wiphy, chan, 248c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg mgmt, presp->head_len, 0, GFP_KERNEL); 2495b112d3d098c97b867cc580f590395cd1e72f18cJohannes Berg cfg80211_put_bss(local->hw.wiphy, bss); 25086a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_on(sdata->dev); 251af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); 252469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 253469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 254af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 255af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_bss *bss) 256469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 2570c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss = 2580c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg container_of((void *)bss, struct cfg80211_bss, priv); 259b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg struct ieee80211_supported_band *sband; 260b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u32 basic_rates; 261b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int i, j; 2620c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg u16 beacon_int = cbss->beacon_interval; 2638cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg const struct cfg80211_bss_ies *ies; 2648cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg u64 tsf; 26557c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2667a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&sdata->u.ibss.mtx); 2677a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 26857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg if (beacon_int < 10) 26957c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int = 10; 27057c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2710c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; 272b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 273b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates = 0; 274b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 275b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < bss->supp_rates_len; i++) { 276b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rate = (bss->supp_rates[i] & 0x7f) * 5; 277b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg bool is_basic = !!(bss->supp_rates[i] & 0x80); 278b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 279b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (j = 0; j < sband->n_bitrates; j++) { 280b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (sband->bitrates[j].bitrate == rate) { 281b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (is_basic) 282b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates |= BIT(j); 283b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg break; 284b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 285b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 286b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 287b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 2888cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg rcu_read_lock(); 2898cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg ies = rcu_dereference(cbss->ies); 2908cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg tsf = ies->tsf; 2918cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg rcu_read_unlock(); 2928cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg 2930c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg __ieee80211_sta_join_ibss(sdata, cbss->bssid, 29457c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int, 2950c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->channel, 296b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates, 2970c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->capability, 2988cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg tsf, false); 299469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 300469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 3016d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartullistatic struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta, 3026d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli bool auth) 3038bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 3048bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 3058bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_sub_if_data *sdata = sta->sdata; 3068bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u8 addr[ETH_ALEN]; 3078bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3088bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg memcpy(addr, sta->sta.addr, ETH_ALEN); 3098bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 310bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); 3118bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 31283d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 31383d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 314267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli /* authorize the station only if the network is not RSN protected. If 315267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli * not wait for the userspace to authorize it */ 316267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli if (!sta->sdata->u.ibss.control_port) 317267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 3188bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3198bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rate_control_rate_init(sta); 3208bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3218bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* If it fails, maybe we raced another insertion? */ 3228bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (sta_info_insert_rcu(sta)) 3238bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta_info_get(sdata, addr); 324452a6d22615bb8262a932b362f41fc5d89f03293Will Hawkins if (auth && !sdata->u.ibss.auth_frame_registrations) { 325bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 326bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "TX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=1)\n", 3272514ec86531481713036081e93a353bbd02e542bSylvain Roger Rieunier sdata->vif.addr, addr, sdata->u.ibss.bssid); 328700e8ea6770df3113e735bcc76ecd6ffac71a13cJouni Malinen ieee80211_send_auth(sdata, 1, WLAN_AUTH_OPEN, 0, NULL, 0, 3291672c0e31917f49d31d30d79067103432bc20cc7Johannes Berg addr, sdata->u.ibss.bssid, NULL, 0, 0, 0); 3306d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli } 3318bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta; 3328bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 3338bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3348bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergstatic struct sta_info * 3358bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, 3368bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg const u8 *bssid, const u8 *addr, 3376d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli u32 supp_rates, bool auth) 3388bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 3398bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 3408bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3418bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_local *local = sdata->local; 3428bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 34355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg struct ieee80211_chanctx_conf *chanctx_conf; 344b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan struct ieee80211_supported_band *sband; 34555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg int band; 3468bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3478bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* 3488bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * XXX: Consider removing the least recently used entry and 3498bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * allow new one to be added. 3508bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg */ 3518bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 352bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 353e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 3548bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3558bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3568bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3588bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { 3598bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3608bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3618bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3628bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 363b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { 3648bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3658bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3668bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3678bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 36855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_lock(); 36955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 37055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (WARN_ON_ONCE(!chanctx_conf)) 37155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return NULL; 3724bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg band = chanctx_conf->def.chan->band; 37355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 37455de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 3758bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_KERNEL); 3768bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (!sta) { 3778bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3788bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3798bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3808bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3818bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->last_rx = jiffies; 3828bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3838bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* make sure mandatory rates are always added */ 384b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan sband = local->hw.wiphy->bands[band]; 3858bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->sta.supp_rates[band] = supp_rates | 386b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan ieee80211_mandatory_rates(sband); 3878bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3886d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return ieee80211_ibss_finish_sta(sta, auth); 3896d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli} 3906d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3912cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartullistatic void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, 3922cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli struct ieee80211_mgmt *mgmt, 3932cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli size_t len) 3942cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli{ 3952cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); 3962cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 3972cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli if (len < IEEE80211_DEAUTH_FRAME_LEN) 3982cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli return; 3992cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 4002cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", 4012cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli mgmt->sa, mgmt->da, mgmt->bssid, reason); 4022cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli sta_info_destroy_addr(sdata, mgmt->sa); 4032cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli} 4042cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 4056d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartullistatic void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, 4066d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli struct ieee80211_mgmt *mgmt, 4076d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli size_t len) 4086d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli{ 4096d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli u16 auth_alg, auth_transaction; 4102cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli struct sta_info *sta; 4112cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli u8 deauth_frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4126d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4136d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli lockdep_assert_held(&sdata->u.ibss.mtx); 4146d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4156d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli if (len < 24 + 6) 4166d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return; 4176d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4186d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4196d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4206d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 421bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 422bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", 423bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); 4247bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli 4257bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) 4267bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli return; 4277bed20503f62ae9660c7b5cd6c3603960e422450Antonio Quartulli 4286d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli sta_info_destroy_addr(sdata, mgmt->sa); 4292cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 0, false); 4306d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli rcu_read_unlock(); 4316d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 4326d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli /* 4332cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli * if we have any problem in allocating the new station, we reply with a 4342cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli * DEAUTH frame to tell the other end that we had a problem 4352cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli */ 4362cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli if (!sta) { 4372cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ieee80211_send_deauth_disassoc(sdata, sdata->u.ibss.bssid, 4382cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli IEEE80211_STYPE_DEAUTH, 4392cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli WLAN_REASON_UNSPECIFIED, true, 4402cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli deauth_frame_buf); 4412cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli return; 4422cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli } 4432cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli 4442cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli /* 4456d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * IEEE 802.11 standard does not require authentication in IBSS 4466d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * networks and most implementations do not seem to use it. 4476d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * However, try to reply to authentication attempts if someone 4486d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * has actually implemented this. 4496d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli */ 450700e8ea6770df3113e735bcc76ecd6ffac71a13cJouni Malinen ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, 4511672c0e31917f49d31d30d79067103432bc20cc7Johannes Berg mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); 4528bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 4538bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 454469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 455d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_mgmt *mgmt, size_t len, 456469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status, 457d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee802_11_elems *elems) 458469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 459469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 460469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int freq; 4610c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 462469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_bss *bss; 463469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 464469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_channel *channel; 465469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u64 beacon_timestamp, rx_timestamp; 466469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u32 supp_rates = 0; 467469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg enum ieee80211_band band = rx_status->band; 46813c40c54682ffe62977f670681268a26d500d6faAlexander Simon struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 46913c40c54682ffe62977f670681268a26d500d6faAlexander Simon bool rates_updated = false; 470469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4711cd8e88e17729f57a9c7f751103e522596bb5de2Johannes Berg if (elems->ds_params) 47259eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf freq = ieee80211_channel_to_frequency(elems->ds_params[0], 47359eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf band); 474469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 475469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg freq = rx_status->freq; 476469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 477469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg channel = ieee80211_get_channel(local->hw.wiphy, freq); 478469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 479469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 480469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 481469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4829eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 483b203ca39126bad99583c908be587df067820a1eaJoe Perches ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { 484469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 485469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 486abe60632f311d515b082b450504ee24006023951Johannes Berg sta = sta_info_get(sdata, mgmt->sa); 487469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4889eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (elems->supp_rates) { 4899eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf supp_rates = ieee80211_sta_get_rates(local, elems, 4909ebb61a23d90703344fc609fbee8da67b1e7456cAshok Nagarajan band, NULL); 4919eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta) { 4929eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf u32 prev_rates; 4939eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 4949eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf prev_rates = sta->sta.supp_rates[band]; 4959eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf /* make sure mandatory rates are always added */ 4969eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf sta->sta.supp_rates[band] = supp_rates | 497b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan ieee80211_mandatory_rates(sband); 498469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4999eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta->sta.supp_rates[band] != prev_rates) { 500bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 501bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", 502bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.addr, prev_rates, 503bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.supp_rates[band]); 50413c40c54682ffe62977f670681268a26d500d6faAlexander Simon rates_updated = true; 5059eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 5068bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } else { 5078bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 5089eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, 5096d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli mgmt->sa, supp_rates, true); 5108bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 51134e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg } 5129eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 5139eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta && elems->wmm_info) 514c2c98fdeb5c897499644eb247285c8e3dacc6450Johannes Berg set_sta_flag(sta, WLAN_STA_WME); 5159eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 516074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg if (sta && elems->ht_operation && elems->ht_cap_elem && 51713c40c54682ffe62977f670681268a26d500d6faAlexander Simon sdata->u.ibss.channel_type != NL80211_CHAN_NO_HT) { 51813c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* we both use HT */ 519e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg struct ieee80211_ht_cap htcap_ie; 5204bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg struct cfg80211_chan_def chandef; 5214bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg 5224bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg ieee80211_ht_oper_to_chandef(channel, 5234bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg elems->ht_operation, 5244bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg &chandef); 52513c40c54682ffe62977f670681268a26d500d6faAlexander Simon 526e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); 52713c40c54682ffe62977f670681268a26d500d6faAlexander Simon 52813c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* 52913c40c54682ffe62977f670681268a26d500d6faAlexander Simon * fall back to HT20 if we don't use or use 53013c40c54682ffe62977f670681268a26d500d6faAlexander Simon * the other extension channel 53113c40c54682ffe62977f670681268a26d500d6faAlexander Simon */ 532e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg if (cfg80211_get_chandef_type(&chandef) != 5334bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg sdata->u.ibss.channel_type) 534e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg htcap_ie.cap_info &= 535e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40); 536e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg 537e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap( 538e1a0c6b3a4b27ed5f21291d0bbee2167ec201ef5Johannes Berg sdata, sband, &htcap_ie, sta); 53913c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 54013c40c54682ffe62977f670681268a26d500d6faAlexander Simon 541e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli if (sta && rates_updated) { 542e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli drv_sta_rc_update(local, sdata, &sta->sta, 543e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli IEEE80211_RC_SUPP_RATES_CHANGED); 54413c40c54682ffe62977f670681268a26d500d6faAlexander Simon rate_control_rate_init(sta); 545e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli } 54613c40c54682ffe62977f670681268a26d500d6faAlexander Simon 5479eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf rcu_read_unlock(); 548469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 549469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 550469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 551d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach channel); 552469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!bss) 553469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 554469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5550c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = container_of((void *)bss, struct cfg80211_bss, priv); 5560c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 5578cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg /* same for beacon and probe response */ 5588cef2c9df88fdd13f518e6607de9d664b31f26ccJohannes Berg beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); 559469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 560469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* check if we need to merge IBSS */ 561469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 562469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* we use a fixed BSSID */ 563a98bfec2985221d8e0904a526cbe88590eaad2a6Benoit Papillault if (sdata->u.ibss.fixed_bssid) 564469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 565469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 566469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* not an IBSS */ 5670c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) 568469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 569469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 570469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different channel */ 57155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (sdata->u.ibss.fixed_channel && 57255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg sdata->u.ibss.channel != cbss->channel) 573469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 574469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 575469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different SSID */ 576469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ssid_len != sdata->u.ibss.ssid_len || 577469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcmp(elems->ssid, sdata->u.ibss.ssid, 578469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->u.ibss.ssid_len)) 579469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 580469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 58134e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen /* same BSSID */ 582b203ca39126bad99583c908be587df067820a1eaJoe Perches if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) 58334e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen goto put_bss; 58434e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen 585f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen if (ieee80211_have_rx_timestamp(rx_status)) { 586f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen /* time when timestamp field was received */ 587f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen rx_timestamp = 588f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen ieee80211_calculate_rx_timestamp(local, rx_status, 589f4bda337bbb6e245e2a07f344990adeb6a70ff35Thomas Pedersen len + FCS_LEN, 24); 5902448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } else { 5912448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* 5922448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * second best option: get current TSF 5932448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * (will return -1 if not supported) 5942448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg */ 59537a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller rx_timestamp = drv_get_tsf(local, sdata); 5962448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } 597469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 598bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 599bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", 600bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->bssid, 601bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)rx_timestamp, 602bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)beacon_timestamp, 603bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)(rx_timestamp - beacon_timestamp), 604bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg jiffies); 605469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 606469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (beacon_timestamp > rx_timestamp) { 607bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 608bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", 609bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->bssid); 610469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_join_ibss(sdata, bss); 6119ebb61a23d90703344fc609fbee8da67b1e7456cAshok Nagarajan supp_rates = ieee80211_sta_get_rates(local, elems, band, NULL); 61234e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 6136d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli supp_rates, true); 6148bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 615469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 616469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 617469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg put_bss: 618469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 619469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 620469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6218bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergvoid ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, 6228bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg const u8 *bssid, const u8 *addr, 6238bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u32 supp_rates) 624469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 6252e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 626469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 627469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 62855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg struct ieee80211_chanctx_conf *chanctx_conf; 629b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan struct ieee80211_supported_band *sband; 63055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg int band; 631469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 632af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* 633af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * XXX: Consider removing the least recently used entry and 634af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * allow new one to be added. 635af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg */ 636469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 637bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 638e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 6398bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 640469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 641469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6422e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) 6438bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 6442e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau 645b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) 6468bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 647469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 64855de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_lock(); 64955de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 65055de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg if (WARN_ON_ONCE(!chanctx_conf)) { 65155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 65255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg return; 65355de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg } 6544bf88530be971bf95a7830ca61b4120980bf4347Johannes Berg band = chanctx_conf->def.chan->band; 65555de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg rcu_read_unlock(); 65655de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg 6578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); 658469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!sta) 6598bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 660469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 661c8716d9dc13c7f6ee92f2bfc6cc3b723b417bff8Rajkumar Manoharan sta->last_rx = jiffies; 662d9a7ddb05e5419ca5e4b54f57074dc33c7ea991cJohannes Berg 663469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* make sure mandatory rates are always added */ 664b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan sband = local->hw.wiphy->bands[band]; 665469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sta->sta.supp_rates[band] = supp_rates | 666b422c6cd7e93bb613030f14d7d8a0cc73f115629Ashok Nagarajan ieee80211_mandatory_rates(sband); 667469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6688bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock(&ifibss->incomplete_lock); 6698bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_add(&sta->list, &ifibss->incomplete_stations); 6708bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock(&ifibss->incomplete_lock); 6718bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 672469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 673469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 674469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) 675469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 676469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 677469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active = 0; 678469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 679469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6807a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&sdata->u.ibss.mtx); 6817a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 682469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 683469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 684469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg list_for_each_entry_rcu(sta, &local->sta_list, list) { 685469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sta->sdata == sdata && 686469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, 687469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg jiffies)) { 688469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active++; 689469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 690469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 691469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 692469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 693469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_unlock(); 694469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 695469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return active; 696469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 697469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 698ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 699ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_JOINED 700ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 701469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 702469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) 703469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 704469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 705469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7067a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 7077a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 708af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 709af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 710469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 711469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); 712af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 713450aae3d7b60a970f266349a837dfb30a539198bSujith if (time_before(jiffies, ifibss->last_scan_completed + 714450aae3d7b60a970f266349a837dfb30a539198bSujith IEEE80211_IBSS_MERGE_INTERVAL)) 715450aae3d7b60a970f266349a837dfb30a539198bSujith return; 716450aae3d7b60a970f266349a837dfb30a539198bSujith 717469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ieee80211_sta_active_ibss(sdata)) 718469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 719469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 720c037b8367c7e2b775a99d74037f5df014d2fbf06John W. Linville if (ifibss->fixed_channel) 721469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 722469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 723bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 724bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); 725469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 72634bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, 72734bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka NULL); 728469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 729469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 730af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) 731469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 732469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 733469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 bssid[ETH_ALEN]; 734469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 capability; 735469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int i; 736469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7377a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 7387a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 739af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) { 740469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(bssid, ifibss->bssid, ETH_ALEN); 741469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } else { 742469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Generate random, not broadcast, locally administered BSSID. Mix in 743469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * own MAC address to make sure that devices that do not have proper 744469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * random number generator get different BSSID. */ 745469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg get_random_bytes(bssid, ETH_ALEN); 746469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg for (i = 0; i < ETH_ALEN; i++) 74747846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg bssid[i] ^= sdata->vif.addr[i]; 748469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] &= ~0x01; 749469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] |= 0x02; 750469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 751469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 752bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); 753469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 754469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability = WLAN_CAPABILITY_IBSS; 755469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 756fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 757469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 758469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 759469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->drop_unencrypted = 0; 760469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 76157c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, 762fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi ifibss->channel, ifibss->basic_rates, 763c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan capability, 0, true); 764469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 765469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 766ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 767ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_SEARCH 768ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 769ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault 770af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) 771469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 772469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 773469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 7740c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 775af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan = NULL; 776469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg const u8 *bssid = NULL; 777469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active_ibss; 778e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg u16 capability; 779469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7807a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 7817a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 782469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active_ibss = ieee80211_sta_active_ibss(sdata); 783bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); 784469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 785469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (active_ibss) 786af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 787469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 788e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability = WLAN_CAPABILITY_IBSS; 789fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 790e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 791af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) 792af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg bssid = ifibss->bssid; 793af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_channel) 794af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg chan = ifibss->channel; 795af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!is_zero_ether_addr(ifibss->bssid)) 796469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid = ifibss->bssid; 7970c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, 7980c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ifibss->ssid, ifibss->ssid_len, 7990c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, 8000c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg capability); 8010c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 8020c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (cbss) { 8030c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss; 804469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8050c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 806bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 807bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "sta_find_ibss: selected %pM current %pM\n", 808bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid, ifibss->bssid); 809bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 810bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "Selected IBSS BSSID %pM based on configured SSID\n", 811bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid); 812469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 813af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_sta_join_ibss(sdata, bss); 814469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 815af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 816d419b9f0fa69e79ccba3e5e79a58a52ae0c2ed6aReinette Chatre } 817469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 818bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); 819469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 820469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Selected IBSS not found in current scan results - try to scan */ 821ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault if (time_after(jiffies, ifibss->last_scan_completed + 822469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_SCAN_INTERVAL)) { 823bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); 824469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 82534bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ieee80211_request_ibss_scan(sdata, ifibss->ssid, 82634bcf71502413f8903ade93746f2d0f04b937a78Stanislaw Gruszka ifibss->ssid_len, chan); 827ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault } else { 828469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int interval = IEEE80211_SCAN_INTERVAL; 829469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 830469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (time_after(jiffies, ifibss->ibss_join_req + 83155de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg IEEE80211_IBSS_JOIN_TIMEOUT)) 83255de908ab292c03f1eb280f51170ddb9c6b57e31Johannes Berg ieee80211_sta_create_ibss(sdata); 833469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 834af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 835af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + interval)); 836469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 837469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 838469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 839469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, 840c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct sk_buff *req) 841469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 842c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct ieee80211_mgmt *mgmt = (void *)req->data; 843469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 844469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 845c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg int tx_last_beacon, len = req->len; 846469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 847c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg struct beacon_data *presp; 848469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos, *end; 849469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8507a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 8517a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 85240b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg presp = rcu_dereference_protected(ifibss->presp, 85340b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg lockdep_is_held(&ifibss->mtx)); 85440b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg 855469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || 85640b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg len < 24 + 2 || !presp) 857469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 858469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8592448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg tx_last_beacon = drv_tx_last_beacon(local); 860469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 861bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 862bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", 863bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); 864469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8651ed76487ce115110171480deabd3cd4656f9803eFelix Fietkau if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) 866469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 867469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 868b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && 869888d04dfbe7e09f930fdaafb257cce2c54c9c3f3Felix Fietkau !is_broadcast_ether_addr(mgmt->bssid)) 870469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 871469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 872469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg end = ((u8 *) mgmt) + len; 873469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = mgmt->u.probe_req.variable; 874469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[0] != WLAN_EID_SSID || 875469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos + 2 + pos[1] > end) { 876bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", 877bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa); 878469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 879469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 880469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[1] != 0 && 881469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (pos[1] != ifibss->ssid_len || 8820da780c269957783d341fc3559e6b4c9912af7b4Benoit Papillault memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { 883469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Ignore ProbeReq for foreign SSID */ 884469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 885469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 886469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 887469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Reply with ProbeResp */ 888c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg skb = dev_alloc_skb(local->tx_headroom + presp->head_len); 889469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!skb) 890469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 891469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 892c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg skb_reserve(skb, local->tx_headroom); 893c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); 894c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg 895c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); 896c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); 89762ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 89862ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg ieee80211_tx_skb(sdata, skb); 899469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 900469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 901d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbachstatic 902d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbachvoid ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, 903d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_mgmt *mgmt, size_t len, 904d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach struct ieee80211_rx_status *rx_status) 905469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 906469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t baselen; 907469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems elems; 908469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 909d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != 910d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach offsetof(typeof(mgmt->u.beacon), variable)); 911d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach 912d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach /* 913d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach * either beacon or probe_resp but the variable field is at the 914d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach * same offset 915d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach */ 916469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 917469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (baselen > len) 918469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 919469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 920469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 921b2e506bfc4d752b68a0ccaae1e977898263eba4cJohannes Berg false, &elems); 922469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 923d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 924469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 925469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9261fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 9271fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct sk_buff *skb) 928469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 929469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status; 930469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 931469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 fc; 932469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 933f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg rx_status = IEEE80211_SKB_RXCB(skb); 934469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 935469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg fc = le16_to_cpu(mgmt->frame_control); 936469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9377a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 9387a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 939c926d006c1514cfb3572893f41f2324e96823661Tim Harvey if (!sdata->u.ibss.ssid_len) 940c926d006c1514cfb3572893f41f2324e96823661Tim Harvey goto mgmt_out; /* not ready to merge yet */ 941c926d006c1514cfb3572893f41f2324e96823661Tim Harvey 942469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (fc & IEEE80211_FCTL_STYPE) { 943469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_REQ: 944c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg ieee80211_rx_mgmt_probe_req(sdata, skb); 945469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 946469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_RESP: 947469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_BEACON: 948d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, 949d45c41722a3eca639ced2c4c93665ced229b1da9Emmanuel Grumbach rx_status); 950469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 951469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_AUTH: 952469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); 953469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 9542cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli case IEEE80211_STYPE_DEAUTH: 9552cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); 9562cc59e784b54fb95accbd5f5a9d12041eec72dbcAntonio Quartulli break; 957469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 9587a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 959c926d006c1514cfb3572893f41f2324e96823661Tim Harvey mgmt_out: 9607a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&sdata->u.ibss.mtx); 961469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 962469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9631fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) 964469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 9651fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 9668bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 967469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9687a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&ifibss->mtx); 9697a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 9707a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg /* 9717a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * Work could be scheduled after scan or similar 9727a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * when we aren't even joined (or trying) with a 9737a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * network. 9747a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg */ 9757a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg if (!ifibss->ssid_len) 9767a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg goto out; 977469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9788bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 9798bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 9808bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 9818bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 9828bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 9838bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 9848bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 9856d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli ieee80211_ibss_finish_sta(sta, true); 9868bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 9878bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 9888bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 9898bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 9908bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 991469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (ifibss->state) { 992469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_SEARCH: 993469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_find_ibss(sdata); 994469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 995469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_JOINED: 996469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_merge_ibss(sdata); 997469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 998469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg default: 999469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg WARN_ON(1); 1000469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 1001469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 1002469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 10037a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg out: 10047a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&ifibss->mtx); 10053a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg} 10063a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg 1007469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_ibss_timer(unsigned long data) 1008469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1009469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_sub_if_data *sdata = 1010469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (struct ieee80211_sub_if_data *) data; 10115bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 1012a61829437e68c8b2036cf5005ed0e875451c9120Stanislaw Gruszka ieee80211_queue_work(&sdata->local->hw, &sdata->work); 10135bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 10145bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 1015469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) 1016469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1017469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 1018469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1019469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg setup_timer(&ifibss->timer, ieee80211_ibss_timer, 1020469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long) sdata); 10217a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_init(&ifibss->mtx); 10228bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg INIT_LIST_HEAD(&ifibss->incomplete_stations); 10238bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_init(&ifibss->incomplete_lock); 1024469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1025469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1026469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg/* scan finished notification */ 1027469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) 1028469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1029af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_sub_if_data *sdata; 1030469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 103129b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_lock(&local->iflist_mtx); 103229b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg list_for_each_entry(sdata, &local->interfaces, list) { 10339607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 10340e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg continue; 1035af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->vif.type != NL80211_IFTYPE_ADHOC) 1036af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg continue; 1037af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.last_scan_completed = jiffies; 10387a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 1039469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 104029b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_unlock(&local->iflist_mtx); 1041469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1042469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1043af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 1044af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct cfg80211_ibss_params *params) 1045af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 1046ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich u32 changed = 0; 1047af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 10487a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 10497a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 1050af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->bssid) { 1051af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); 1052af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = true; 1053af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } else 1054af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = false; 1055af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1056fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg sdata->u.ibss.privacy = params->privacy; 1057267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sdata->u.ibss.control_port = params->control_port; 1058fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->u.ibss.basic_rates = params->basic_rates; 1059dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, 1060dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau sizeof(params->mcast_rate)); 1061fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg 106257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg sdata->vif.bss_conf.beacon_int = params->beacon_interval; 106357c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 1064683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg sdata->u.ibss.channel = params->chandef.chan; 1065683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg sdata->u.ibss.channel_type = 1066683b6d3b31a51956ea540df00abb0b78894924c1Johannes Berg cfg80211_get_chandef_type(¶ms->chandef); 1067af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_channel = params->channel_fixed; 1068af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1069af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->ie) { 1070af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, 1071af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg GFP_KERNEL); 1072af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->u.ibss.ie) 1073af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie_len = params->ie_len; 1074af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } 1075af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1076af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; 1077af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ibss_join_req = jiffies; 1078af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1079badecb001a310408d3473b1fc2ed5aefd0bc92a9Antonio Quartulli memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); 10800e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg sdata->u.ibss.ssid_len = params->ssid_len; 10810e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg 10827da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_unlock(&sdata->u.ibss.mtx); 10837da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg 1084ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich /* 1085ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is 1086ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * reserved, but an HT STA shall protect HT transmissions as though 1087ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * the HT Protection field were set to non-HT mixed mode. 1088ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 1089ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * In an IBSS, the RIFS Mode field of the HT Operation element is 1090ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * also reserved, but an HT STA shall operate as though this field 1091ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * were set to 1. 1092ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich */ 1093ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1094ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich sdata->vif.bss_conf.ht_operation_mode |= 1095ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED 1096ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich | IEEE80211_HT_PARAM_RIFS_MODE; 1097ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1098ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich changed |= BSS_CHANGED_HT; 1099ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich ieee80211_bss_info_change_notify(sdata, changed); 1100ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 110104ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg sdata->smps_mode = IEEE80211_SMPS_OFF; 110204ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg sdata->needed_rx_chains = sdata->local->rx_chains; 110304ecd2578e712c301fa1369d2a8f298a2b4b146aJohannes Berg 110464592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg ieee80211_queue_work(&sdata->local->hw, &sdata->work); 1105af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1106af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1107af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1108af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1109af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) 1110af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 11115ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 11125ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_local *local = sdata->local; 11135ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct cfg80211_bss *cbss; 11145ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi u16 capability; 11157a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg int active_ibss; 11168bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 1117c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg struct beacon_data *presp; 11187a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 11197a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 11205ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11215ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi active_ibss = ieee80211_sta_active_ibss(sdata); 11225ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11235ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { 11245ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability = WLAN_CAPABILITY_IBSS; 11255ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11265ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (ifibss->privacy) 11275ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability |= WLAN_CAPABILITY_PRIVACY; 11285ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11295ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel, 11305ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->bssid, ifibss->ssid, 11315ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->ssid_len, WLAN_CAPABILITY_IBSS | 11325ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi WLAN_CAPABILITY_PRIVACY, 11335ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability); 11345ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11355ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (cbss) { 11365ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cfg80211_unlink_bss(local->hw.wiphy, cbss); 11375b112d3d098c97b867cc580f590395cd1e72f18cJohannes Berg cfg80211_put_bss(local->hw.wiphy, cbss); 11385ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 11395ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 1140af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1141b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich ifibss->state = IEEE80211_IBSS_MLME_SEARCH; 1142b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich memset(ifibss->bssid, 0, ETH_ALEN); 1143b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich ifibss->ssid_len = 0; 1144b78a4932f5fb11fadf41e69c606a33fa6787574cSimon Wunderlich 1145b998e8bb3e1c6eeae5eab9d6a434563270286c3bJohannes Berg sta_info_flush(sdata); 11468bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11478bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11488bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 11498bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 11508bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 11518bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 11528bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11538bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11548bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta_info_free(local, sta); 11558bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11568bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 11578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11588bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 115986a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 1160af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1161af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* remove beacon */ 1162af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree(sdata->u.ibss.ie); 1163c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg presp = rcu_dereference_protected(ifibss->presp, 1164c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg lockdep_is_held(&sdata->u.ibss.mtx)); 1165a9b3cd7f323b2e57593e7215362a7b02fc933e3aStephen Hemminger RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); 11668fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 1167c13a765bd96f4e2f52d218ee6e5c0715380eeeb8Sujith Manoharan sdata->vif.bss_conf.ibss_creator = false; 1168d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg sdata->vif.bss_conf.enable_beacon = false; 11690ca54f6c5fd4ce58aa044d1fc7f00d7f6cf2801cMarek Puzyniak sdata->vif.bss_conf.ssid_len = 0; 1170d6a83228823fc0cc8d79d95c9f0bf568b7317862Johannes Berg clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 11718fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | 11728fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg BSS_CHANGED_IBSS); 1173af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 1174c3ffeab4345830aadfc78444933754330f1339e7Johannes Berg kfree(presp); 1175af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 117635f20c14a103ca2c7062999e934a513b83d84de6Johannes Berg skb_queue_purge(&sdata->skb_queue); 11775cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 1178bc05d19f4b884b1dbbce48912710ae3f972c89d2Johannes Berg del_timer_sync(&sdata->u.ibss.timer); 11797a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 11807a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&sdata->u.ibss.mtx); 1181bc05d19f4b884b1dbbce48912710ae3f972c89d2Johannes Berg 1182af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1183af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1184