ibss.c revision 64592c8fc0e99d445fc3fdedddeb6088e20086f1
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#include <asm/unaligned.h> 24469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 25469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include "ieee80211_i.h" 262448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg#include "driver-ops.h" 27469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#include "rate.h" 28469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 29469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_SCAN_INTERVAL (2 * HZ) 30469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) 31469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) 32469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 33469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) 344a332a385a86e31bfe181d969a8cb5579798fe03Alina Friedrichsen#define IEEE80211_IBSS_MERGE_DELAY 0x400000 35469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) 36469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 37469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_MAX_STA_ENTRIES 128 38469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 39469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 40469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, 41469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 42469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len) 43469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 44469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 auth_alg, auth_transaction, status_code; 45469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 46469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (len < 24 + 6) 47469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 48469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 49469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 50469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 51469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg status_code = le16_to_cpu(mgmt->u.auth.status_code); 52469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 53469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* 54469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * IEEE 802.11 standard does not require authentication in IBSS 55469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * networks and most implementations do not seem to use it. 56469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * However, try to reply to authentication attempts if someone 57469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * has actually implemented this. 58469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg */ 59469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) 60469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, NULL, 0, 61fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg sdata->u.ibss.bssid, NULL, 0, 0); 62469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 63469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 64af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 65af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg const u8 *bssid, const int beacon_int, 66af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan, 67b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg const u32 basic_rates, 68af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg const u16 capability, u64 tsf) 69469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 70469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 71469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 72b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rates, i; 73469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 74469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 75469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos; 76469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_supported_band *sband; 77f446d10f214091408b7300f15c9adf60569edf28Johannes Berg struct cfg80211_bss *bss; 7857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg u32 bss_change; 79b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; 802448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg 812448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* Reset own TSF to allow time synchronization work. */ 822448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg drv_reset_tsf(local); 83469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 84af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb = ifibss->skb; 85af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg rcu_assign_pointer(ifibss->presp, NULL); 86af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 87af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb->data = skb->head; 88af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb->len = 0; 89af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb_reset_tail_pointer(skb); 90af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb_reserve(skb, sdata->local->hw.extra_tx_headroom); 91469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 92af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (memcmp(ifibss->bssid, bssid, ETH_ALEN)) 93af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sta_info_flush(sdata->local, sdata); 94469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9549b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg /* if merging, indicate to driver that we leave the old IBSS */ 9649b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg if (sdata->vif.bss_conf.ibss_joined) { 9749b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 9849b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS); 9949b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg } 10049b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg 101469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(ifibss->bssid, bssid, ETH_ALEN); 102469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 103af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; 104469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 105af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg local->oper_channel = chan; 1060aaffa9b9699894aab3266195a529baf9f96ac29Johannes Berg WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); 107af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); 10857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 109af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sband = local->hw.wiphy->bands[chan->band]; 110469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 111b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg /* build supported rates array */ 112b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg pos = supp_rates; 113b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < sband->n_bitrates; i++) { 114b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rate = sband->bitrates[i].bitrate; 115b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 basic = 0; 116b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (basic_rates & BIT(i)) 117b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic = 0x80; 118b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg *pos++ = basic | (u8) (rate / 5); 119b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 120b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 121469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Build IBSS probe response */ 122af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mgmt = (void *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); 123469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); 124469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 125469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_STYPE_PROBE_RESP); 126469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memset(mgmt->da, 0xff, ETH_ALEN); 12747846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 128469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 12957c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); 130707c1b4e68a2811ff2c9e75750a98a3310789a2dSujith mgmt->u.beacon.timestamp = cpu_to_le64(tsf); 131469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->u.beacon.capab_info = cpu_to_le16(capability); 132469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 133469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + ifibss->ssid_len); 134469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SSID; 135469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = ifibss->ssid_len; 136469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, ifibss->ssid, ifibss->ssid_len); 137469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 138b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg rates = sband->n_bitrates; 139469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (rates > 8) 140469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rates = 8; 141469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + rates); 142469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SUPP_RATES; 143469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = rates; 144469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, supp_rates, rates); 145469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 146469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sband->band == IEEE80211_BAND_2GHZ) { 147469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + 1); 148469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_DS_PARAMS; 149469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 1; 150af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 151469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 152469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 153469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + 2); 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) { 161b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg rates = sband->n_bitrates - 8; 162469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + rates); 163469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_EXT_SUPP_RATES; 164469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = rates; 165469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, &supp_rates[8], rates); 166469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 167469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 168af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->ie_len) 169af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(skb_put(skb, ifibss->ie_len), 170af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ifibss->ie, ifibss->ie_len); 171af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 172af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg rcu_assign_pointer(ifibss->presp, skb); 173469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1742d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg sdata->vif.bss_conf.beacon_int = beacon_int; 1752d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change = BSS_CHANGED_BEACON_INT; 1762d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= ieee80211_reset_erp_info(sdata); 1772d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BSSID; 1782d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON; 1792d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON_ENABLED; 1808fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg bss_change |= BSS_CHANGED_IBSS; 1818fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = true; 1822d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg ieee80211_bss_info_change_notify(sdata, bss_change); 183469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 184b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); 185469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 186469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ifibss->state = IEEE80211_IBSS_MLME_JOINED; 187af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 188af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 189469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 190f446d10f214091408b7300f15c9adf60569edf28Johannes Berg bss = cfg80211_inform_bss_frame(local->hw.wiphy, local->hw.conf.channel, 191f446d10f214091408b7300f15c9adf60569edf28Johannes Berg mgmt, skb->len, 0, GFP_KERNEL); 192f446d10f214091408b7300f15c9adf60569edf28Johannes Berg cfg80211_put_bss(bss); 193af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); 194469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 195469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 196af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 197af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_bss *bss) 198469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1990c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss = 2000c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg container_of((void *)bss, struct cfg80211_bss, priv); 201b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg struct ieee80211_supported_band *sband; 202b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u32 basic_rates; 203b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int i, j; 2040c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg u16 beacon_int = cbss->beacon_interval; 20557c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 20657c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg if (beacon_int < 10) 20757c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int = 10; 20857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2090c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; 210b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 211b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates = 0; 212b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 213b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < bss->supp_rates_len; i++) { 214b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rate = (bss->supp_rates[i] & 0x7f) * 5; 215b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg bool is_basic = !!(bss->supp_rates[i] & 0x80); 216b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 217b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (j = 0; j < sband->n_bitrates; j++) { 218b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (sband->bitrates[j].bitrate == rate) { 219b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (is_basic) 220b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates |= BIT(j); 221b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg break; 222b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 223b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 224b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 225b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 2260c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg __ieee80211_sta_join_ibss(sdata, cbss->bssid, 22757c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int, 2280c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->channel, 229b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates, 2300c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->capability, 2310c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->tsf); 232469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 233469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 234469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 235469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 236469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len, 237469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status, 238469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems *elems, 239469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bool beacon) 240469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 241469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 242469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int freq; 2430c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 244469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_bss *bss; 245469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 246469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_channel *channel; 247469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u64 beacon_timestamp, rx_timestamp; 248469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u32 supp_rates = 0; 249469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg enum ieee80211_band band = rx_status->band; 250469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 251469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ds_params && elems->ds_params_len == 1) 252469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg freq = ieee80211_channel_to_frequency(elems->ds_params[0]); 253469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 254469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg freq = rx_status->freq; 255469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 256469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg channel = ieee80211_get_channel(local->hw.wiphy, freq); 257469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 258469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 259469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 260469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 261469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates && 262469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcmp(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) { 263469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg supp_rates = ieee80211_sta_get_rates(local, elems, band); 264469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 265469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 266469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 267abe60632f311d515b082b450504ee24006023951Johannes Berg sta = sta_info_get(sdata, mgmt->sa); 268469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sta) { 269469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u32 prev_rates; 270469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 271469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg prev_rates = sta->sta.supp_rates[band]; 272469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* make sure mandatory rates are always added */ 273469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sta->sta.supp_rates[band] = supp_rates | 274469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_mandatory_rates(local, band); 275469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 27609a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf if (sta->sta.supp_rates[band] != prev_rates) { 277469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 278469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: updated supp_rates set " 27909a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf "for %pM based on beacon/probe_response " 28009a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf "(0x%x -> 0x%x)\n", 28109a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf sdata->name, sta->sta.addr, 28209a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf prev_rates, sta->sta.supp_rates[band]); 283469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif 28409a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf rate_control_rate_init(sta); 28509a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf } 28634e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg rcu_read_unlock(); 28734e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg } else { 28834e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg rcu_read_unlock(); 28934e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 29034e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg supp_rates, GFP_KERNEL); 29134e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg } 292469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 293469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 294469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 295469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg channel, beacon); 296469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!bss) 297469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 298469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 2990c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = container_of((void *)bss, struct cfg80211_bss, priv); 3000c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 301469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* was just updated in ieee80211_bss_info_update */ 3020c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg beacon_timestamp = cbss->tsf; 303469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 304469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* check if we need to merge IBSS */ 305469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 306469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* we use a fixed BSSID */ 307a98bfec2985221d8e0904a526cbe88590eaad2a6Benoit Papillault if (sdata->u.ibss.fixed_bssid) 308469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 309469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 310469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* not an IBSS */ 3110c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) 312469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 313469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 314469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different channel */ 3150c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (cbss->channel != local->oper_channel) 316469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 317469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 318469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different SSID */ 319469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ssid_len != sdata->u.ibss.ssid_len || 320469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcmp(elems->ssid, sdata->u.ibss.ssid, 321469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->u.ibss.ssid_len)) 322469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 323469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 32434e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen /* same BSSID */ 3250c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (memcmp(cbss->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) 32634e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen goto put_bss; 32734e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen 328469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (rx_status->flag & RX_FLAG_TSFT) { 329469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* 330469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * For correct IBSS merging we need mactime; since mactime is 331469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * defined as the time the first data symbol of the frame hits 332469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * the PHY, and the timestamp of the beacon is defined as "the 333469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * time that the data symbol containing the first bit of the 334469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * timestamp is transmitted to the PHY plus the transmitting 335469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * STA's delays through its local PHY from the MAC-PHY 336469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * interface to its interface with the WM" (802.11 11.1.2) 337469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * - equals the time this bit arrives at the receiver - we have 338469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * to take into account the offset between the two. 339469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * 340469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * E.g. at 1 MBit that means mactime is 192 usec earlier 341469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * (=24 bytes * 8 usecs/byte) than the beacon timestamp. 342469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg */ 343469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int rate; 344469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 345469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (rx_status->flag & RX_FLAG_HT) 346469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rate = 65; /* TODO: HT rates */ 347469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 348469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rate = local->hw.wiphy->bands[band]-> 349469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bitrates[rx_status->rate_idx].bitrate; 350469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 351469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); 3522448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } else { 3532448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* 3542448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * second best option: get current TSF 3552448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * (will return -1 if not supported) 3562448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg */ 3572448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg rx_timestamp = drv_get_tsf(local); 3582448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } 359469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 360469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 361469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" 362469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", 363469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->sa, mgmt->bssid, 364469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long long)rx_timestamp, 365469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long long)beacon_timestamp, 366469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long long)(rx_timestamp - beacon_timestamp), 367469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg jiffies); 368469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif 369469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 3704a332a385a86e31bfe181d969a8cb5579798fe03Alina Friedrichsen /* give slow hardware some time to do the TSF sync */ 3714a332a385a86e31bfe181d969a8cb5579798fe03Alina Friedrichsen if (rx_timestamp < IEEE80211_IBSS_MERGE_DELAY) 3724a332a385a86e31bfe181d969a8cb5579798fe03Alina Friedrichsen goto put_bss; 3734a332a385a86e31bfe181d969a8cb5579798fe03Alina Friedrichsen 374469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (beacon_timestamp > rx_timestamp) { 375469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 376469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: beacon TSF higher than " 377469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg "local TSF - IBSS merge with BSSID %pM\n", 37847846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg sdata->name, mgmt->bssid); 379469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif 380469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_join_ibss(sdata, bss); 38109a08cff3d13315c948e6aee5cf912f8f1db54e7Bruno Randolf supp_rates = ieee80211_sta_get_rates(local, elems, band); 38234e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 38334e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg supp_rates, GFP_KERNEL); 384469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 385469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 386469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg put_bss: 387469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 388469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 389469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 390469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg/* 391469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * Add a new IBSS station, will also be called by the RX code when, 392469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * in IBSS mode, receiving a frame from a yet-unknown station, hence 393469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * must be callable in atomic context. 394469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg */ 395469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstruct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, 39634e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg u8 *bssid,u8 *addr, u32 supp_rates, 39734e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg gfp_t gfp) 398469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 3992e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 400469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 401469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 402469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int band = local->hw.conf.channel->band; 403469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 404af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* 405af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * XXX: Consider removing the least recently used entry and 406af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * allow new one to be added. 407af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg */ 408469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 409af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (net_ratelimit()) 410af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg printk(KERN_DEBUG "%s: No room for a new IBSS STA entry %pM\n", 41147846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg sdata->name, addr); 412469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return NULL; 413469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 414469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4152e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) 4162e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau return NULL; 4172e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau 418469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (compare_ether_addr(bssid, sdata->u.ibss.bssid)) 419469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return NULL; 420469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 421469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_VERBOSE_DEBUG 422469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n", 42347846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg wiphy_name(local->hw.wiphy), addr, sdata->name); 424469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif 425469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 42634e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg sta = sta_info_alloc(sdata, addr, gfp); 427469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!sta) 428469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return NULL; 429469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 430469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg set_sta_flags(sta, WLAN_STA_AUTHORIZED); 431469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 432469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* make sure mandatory rates are always added */ 433469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sta->sta.supp_rates[band] = supp_rates | 434469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_mandatory_rates(local, band); 435469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 436469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rate_control_rate_init(sta); 437469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 43834e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg /* If it fails, maybe we raced another insertion? */ 439469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sta_info_insert(sta)) 44034e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg return sta_info_get(sdata, addr); 441469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return sta; 442469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 443469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 444469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) 445469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 446469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 447469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active = 0; 448469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 449469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 450469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 451469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 452469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg list_for_each_entry_rcu(sta, &local->sta_list, list) { 453469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sta->sdata == sdata && 454469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, 455469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg jiffies)) { 456469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active++; 457469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 458469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 459469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 460469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 461469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_unlock(); 462469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 463469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return active; 464469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 465469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 466ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 467ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_JOINED 468ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 469469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 470469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) 471469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 472469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 473469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 474af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 475af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 476469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 477469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); 478af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 479450aae3d7b60a970f266349a837dfb30a539198bSujith if (time_before(jiffies, ifibss->last_scan_completed + 480450aae3d7b60a970f266349a837dfb30a539198bSujith IEEE80211_IBSS_MERGE_INTERVAL)) 481450aae3d7b60a970f266349a837dfb30a539198bSujith return; 482450aae3d7b60a970f266349a837dfb30a539198bSujith 483469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ieee80211_sta_active_ibss(sdata)) 484469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 485469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 486af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_channel) 487469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 488469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 489469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " 49047846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg "IBSS networks with same SSID (merge)\n", sdata->name); 491469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 492be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ieee80211_request_internal_scan(sdata, 493be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ifibss->ssid, ifibss->ssid_len, 494be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ifibss->fixed_channel ? ifibss->channel : NULL); 495469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 496469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 497af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) 498469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 499469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 500469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 501469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_supported_band *sband; 502469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 bssid[ETH_ALEN]; 503469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 capability; 504469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int i; 505469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 506af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) { 507469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(bssid, ifibss->bssid, ETH_ALEN); 508469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } else { 509469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Generate random, not broadcast, locally administered BSSID. Mix in 510469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * own MAC address to make sure that devices that do not have proper 511469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * random number generator get different BSSID. */ 512469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg get_random_bytes(bssid, ETH_ALEN); 513469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg for (i = 0; i < ETH_ALEN; i++) 51447846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg bssid[i] ^= sdata->vif.addr[i]; 515469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] &= ~0x01; 516469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] |= 0x02; 517469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 518469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 519469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", 52047846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg sdata->name, bssid); 521469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 522af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sband = local->hw.wiphy->bands[ifibss->channel->band]; 523469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 524469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability = WLAN_CAPABILITY_IBSS; 525469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 526fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 527469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 528469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 529469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->drop_unencrypted = 0; 530469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 53157c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, 532b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg ifibss->channel, 3, /* first two are basic */ 533b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg capability, 0); 534469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 535469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 536ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 537ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_SEARCH 538ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 539ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault 540af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) 541469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 542469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 543469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 5440c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 545af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan = NULL; 546469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg const u8 *bssid = NULL; 547469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active_ibss; 548e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg u16 capability; 549469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 550469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active_ibss = ieee80211_sta_active_ibss(sdata); 551469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 552469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", 55347846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg sdata->name, active_ibss); 554469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif /* CONFIG_MAC80211_IBSS_DEBUG */ 555469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 556469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (active_ibss) 557af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 558469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 559e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability = WLAN_CAPABILITY_IBSS; 560fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 561e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 562af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) 563af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg bssid = ifibss->bssid; 564af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_channel) 565af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg chan = ifibss->channel; 566af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!is_zero_ether_addr(ifibss->bssid)) 567469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid = ifibss->bssid; 5680c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, 5690c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ifibss->ssid, ifibss->ssid_len, 5700c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, 5710c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg capability); 5720c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 5730c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (cbss) { 5740c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss; 575469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5760c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 577469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 578469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG " sta_find_ibss: selected %pM current " 5790c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg "%pM\n", cbss->bssid, ifibss->bssid); 580469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif /* CONFIG_MAC80211_IBSS_DEBUG */ 581469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 582469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" 583469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg " based on configured SSID\n", 5840c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg sdata->name, cbss->bssid); 585469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 586af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_sta_join_ibss(sdata, bss); 587469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 588af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 589d419b9f0fa69e79ccba3e5e79a58a52ae0c2ed6aReinette Chatre } 590469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 591469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 592469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG " did not try to join ibss\n"); 593469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif /* CONFIG_MAC80211_IBSS_DEBUG */ 594469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 595469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Selected IBSS not found in current scan results - try to scan */ 596ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault if (time_after(jiffies, ifibss->last_scan_completed + 597469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_SCAN_INTERVAL)) { 598469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " 59947846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg "join\n", sdata->name); 600469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 601be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ieee80211_request_internal_scan(sdata, 602be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ifibss->ssid, ifibss->ssid_len, 603be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ifibss->fixed_channel ? ifibss->channel : NULL); 604ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault } else { 605469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int interval = IEEE80211_SCAN_INTERVAL; 606469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 607469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (time_after(jiffies, ifibss->ibss_join_req + 608469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_IBSS_JOIN_TIMEOUT)) { 609af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!(local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS)) { 610af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_sta_create_ibss(sdata); 611af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 612af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } 613469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: IBSS not allowed on" 61447846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg " %d MHz\n", sdata->name, 615469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg local->hw.conf.channel->center_freq); 616469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 617469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* No IBSS found - decrease scan interval and continue 618469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * scanning. */ 619469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg interval = IEEE80211_SCAN_INTERVAL_SLOW; 620469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 621469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 622af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 623af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + interval)); 624469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 625469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 626469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 627469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, 628469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 629469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len) 630469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 631469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 632469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 633469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int tx_last_beacon; 634469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 635469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *resp; 636469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos, *end; 637469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 638469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || 639af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg len < 24 + 2 || !ifibss->presp) 640469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 641469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6422448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg tx_last_beacon = drv_tx_last_beacon(local); 643469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 644469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 645469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" 646469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg " (tx_last_beacon=%d)\n", 64747846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg sdata->name, mgmt->sa, mgmt->da, 648469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->bssid, tx_last_beacon); 649469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif /* CONFIG_MAC80211_IBSS_DEBUG */ 650469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 651469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!tx_last_beacon) 652469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 653469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 654469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (memcmp(mgmt->bssid, ifibss->bssid, ETH_ALEN) != 0 && 655469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) 656469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 657469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 658469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg end = ((u8 *) mgmt) + len; 659469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = mgmt->u.probe_req.variable; 660469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[0] != WLAN_EID_SSID || 661469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos + 2 + pos[1] > end) { 662469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 663469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " 664469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg "from %pM\n", 66547846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg sdata->name, mgmt->sa); 666469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif 667469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 668469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 669469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[1] != 0 && 670469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (pos[1] != ifibss->ssid_len || 6710da780c269957783d341fc3559e6b4c9912af7b4Benoit Papillault memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { 672469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Ignore ProbeReq for foreign SSID */ 673469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 674469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 675469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 676469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Reply with ProbeResp */ 677af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb = skb_copy(ifibss->presp, GFP_KERNEL); 678469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!skb) 679469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 680469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 681469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg resp = (struct ieee80211_mgmt *) skb->data; 682469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(resp->da, mgmt->sa, ETH_ALEN); 683469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#ifdef CONFIG_MAC80211_IBSS_DEBUG 684469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", 68547846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg sdata->name, resp->da); 686469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#endif /* CONFIG_MAC80211_IBSS_DEBUG */ 68762ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 68862ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg ieee80211_tx_skb(sdata, skb); 689469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 690469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 691469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 692469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 693469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len, 694469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status) 695469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 696469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t baselen; 697469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems elems; 698469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 69947846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) 700469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; /* ignore ProbeResp to foreign address */ 701469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 702469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 703469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (baselen > len) 704469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 705469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 706469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 707469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg &elems); 708469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 709469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); 710469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 711469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 712469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 713469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 714469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len, 715469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status) 716469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 717469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t baselen; 718469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems elems; 719469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 720469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Process beacon from the current BSS */ 721469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 722469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (baselen > len) 723469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 724469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 725469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); 726469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 727469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); 728469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 729469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 730469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 731469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb) 732469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 733469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status; 734469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 735469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 fc; 736469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 737f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg rx_status = IEEE80211_SKB_RXCB(skb); 738469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 739469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg fc = le16_to_cpu(mgmt->frame_control); 740469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 741469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (fc & IEEE80211_FCTL_STYPE) { 742469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_REQ: 743469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_probe_req(sdata, mgmt, skb->len); 744469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 745469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_RESP: 746469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, 747469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rx_status); 748469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 749469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_BEACON: 750469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, 751469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rx_status); 752469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 753469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_AUTH: 754469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); 755469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 756469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 757469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 758469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg kfree_skb(skb); 759469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 760469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 761469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_ibss_work(struct work_struct *work) 762469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 763469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_sub_if_data *sdata = 76464592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg container_of(work, struct ieee80211_sub_if_data, work); 765469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 766469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss; 767469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 768469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7695bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (WARN_ON(local->suspended)) 7705bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg return; 7715bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 7729607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 773469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 774469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 775fbe9c429f195111bbf7f1630efa19aee295fd8e7Helmut Schaa if (local->scanning) 776469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 777469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 778469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_ADHOC)) 779469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 780469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ifibss = &sdata->u.ibss; 781469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 78235f20c14a103ca2c7062999e934a513b83d84de6Johannes Berg while ((skb = skb_dequeue(&sdata->skb_queue))) 783469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_ibss_rx_queued_mgmt(sdata, skb); 784469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 785469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!test_and_clear_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request)) 786469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 787469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 788469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (ifibss->state) { 789469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_SEARCH: 790469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_find_ibss(sdata); 791469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 792469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_JOINED: 793469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_merge_ibss(sdata); 794469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 795469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg default: 796469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg WARN_ON(1); 797469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 798469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 799469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 800469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8013a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Bergstatic void ieee80211_queue_ibss_work(struct ieee80211_sub_if_data *sdata) 8023a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg{ 8033a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 8043a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg struct ieee80211_local *local = sdata->local; 8053a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg 8063a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request); 80764592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 8083a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg} 8093a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg 810469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_ibss_timer(unsigned long data) 811469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 812469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_sub_if_data *sdata = 813469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (struct ieee80211_sub_if_data *) data; 814469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 815469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 816469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8175bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (local->quiescing) { 8185bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = true; 8195bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg return; 8205bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg } 8215bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 8223a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg ieee80211_queue_ibss_work(sdata); 823469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 824469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8255bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg#ifdef CONFIG_PM 8265bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata) 8275bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 8285bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 8295bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 8305bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (del_timer_sync(&ifibss->timer)) 8315bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = true; 8325bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 8335bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 8345bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata) 8355bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 8365bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 8375bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 8385bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (ifibss->timer_running) { 8395bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg add_timer(&ifibss->timer); 8405bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = false; 8415bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg } 8425bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 8435bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg#endif 8445bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 845469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) 846469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 847469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 848469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 84964592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg INIT_WORK(&sdata->work, ieee80211_ibss_work); 850469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg setup_timer(&ifibss->timer, ieee80211_ibss_timer, 851469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long) sdata); 852469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 853469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 854469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg/* scan finished notification */ 855469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) 856469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 857af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_sub_if_data *sdata; 858469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 85929b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_lock(&local->iflist_mtx); 86029b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg list_for_each_entry(sdata, &local->interfaces, list) { 8619607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 8620e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg continue; 863af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->vif.type != NL80211_IFTYPE_ADHOC) 864af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg continue; 8650e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg if (!sdata->u.ibss.ssid_len) 8660e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg continue; 867af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.last_scan_completed = jiffies; 8683a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg ieee80211_queue_ibss_work(sdata); 869469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 87029b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_unlock(&local->iflist_mtx); 871469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 872469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 873469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergieee80211_rx_result 874f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Bergieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 875469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 876469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 877469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 878469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 fc; 879469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 880469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (skb->len < 24) 881469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return RX_DROP_MONITOR; 882469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 883469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 884469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg fc = le16_to_cpu(mgmt->frame_control); 885469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 886469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (fc & IEEE80211_FCTL_STYPE) { 887469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_RESP: 888469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_BEACON: 889469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_REQ: 890469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_AUTH: 89135f20c14a103ca2c7062999e934a513b83d84de6Johannes Berg skb_queue_tail(&sdata->skb_queue, skb); 89264592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 893469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return RX_QUEUED; 894469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 895469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 896469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return RX_DROP_MONITOR; 897469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 898af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 899af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 900af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct cfg80211_ibss_params *params) 901af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 902af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct sk_buff *skb; 903af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 904af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->bssid) { 905af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); 906af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = true; 907af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } else 908af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = false; 909af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 910fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg sdata->u.ibss.privacy = params->privacy; 911fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg 91257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg sdata->vif.bss_conf.beacon_int = params->beacon_interval; 91357c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 914af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.channel = params->channel; 915af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_channel = params->channel_fixed; 916af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 917adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg /* fix ourselves to that channel now already */ 918adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg if (params->channel_fixed) { 919adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg sdata->local->oper_channel = params->channel; 9200aaffa9b9699894aab3266195a529baf9f96ac29Johannes Berg WARN_ON(!ieee80211_set_channel_type(sdata->local, sdata, 9210aaffa9b9699894aab3266195a529baf9f96ac29Johannes Berg NL80211_CHAN_NO_HT)); 922adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg } 923adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg 924af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->ie) { 925af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, 926af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg GFP_KERNEL); 927af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->u.ibss.ie) 928af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ie_len = params->ie_len; 929af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } 930af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 931af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + 932af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 36 /* bitrates */ + 933af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 34 /* SSID */ + 934af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 3 /* DS params */ + 935af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 4 /* IBSS params */ + 936af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg params->ie_len); 937af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!skb) 938af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return -ENOMEM; 939af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 940af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.skb = skb; 941af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; 942af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ibss_join_req = jiffies; 943af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 9440e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN); 9450e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg 9460e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg /* 9470e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg * The ssid_len setting below is used to see whether 9480e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg * we are active, and we need all other settings 9490e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg * before that may get visible. 9500e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg */ 9510e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg mb(); 9520e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg 9530e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg sdata->u.ibss.ssid_len = params->ssid_len; 9540e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg 9555cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(sdata->local); 9565cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 957af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg set_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request); 95864592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg ieee80211_queue_work(&sdata->local->hw, &sdata->work); 959af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 960af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 961af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 962af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 963af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) 964af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 965af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct sk_buff *skb; 966af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 967af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg del_timer_sync(&sdata->u.ibss.timer); 968af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request); 96964592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg cancel_work_sync(&sdata->work); 970af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request); 971af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 972af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sta_info_flush(sdata->local, sdata); 973af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 974af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* remove beacon */ 975af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree(sdata->u.ibss.ie); 976af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb = sdata->u.ibss.presp; 977af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg rcu_assign_pointer(sdata->u.ibss.presp, NULL); 9788fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 9798fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | 9808fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg BSS_CHANGED_IBSS); 981af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 982af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree_skb(skb); 983af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 98435f20c14a103ca2c7062999e934a513b83d84de6Johannes Berg skb_queue_purge(&sdata->skb_queue); 985af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memset(sdata->u.ibss.bssid, 0, ETH_ALEN); 9865cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg sdata->u.ibss.ssid_len = 0; 9875cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 9885cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(sdata->local); 989af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 990af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 991af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 992