ibss.c revision e687f61eedab8895e5669cb82cebe0253631cd8c
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_SCAN_INTERVAL_SLOW (15 * HZ) 30469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) 31469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 32469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) 33469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) 34469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 35469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg#define IEEE80211_IBSS_MAX_STA_ENTRIES 128 36469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 37469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 38af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 39af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg const u8 *bssid, const int beacon_int, 40af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan, 41b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg const u32 basic_rates, 42af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg const u16 capability, u64 tsf) 43469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 44469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 45469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 46b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rates, i; 47469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 48469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 49469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos; 50469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_supported_band *sband; 51f446d10f214091408b7300f15c9adf60569edf28Johannes Berg struct cfg80211_bss *bss; 5257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg u32 bss_change; 53b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; 5413c40c54682ffe62977f670681268a26d500d6faAlexander Simon enum nl80211_channel_type channel_type; 552448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg 567a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 577a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 582448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* Reset own TSF to allow time synchronization work. */ 5937a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller drv_reset_tsf(local, sdata); 60469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 61af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb = ifibss->skb; 62a9b3cd7f323b2e57593e7215362a7b02fc933e3aStephen Hemminger RCU_INIT_POINTER(ifibss->presp, NULL); 63af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 64af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb->data = skb->head; 65af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb->len = 0; 66af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb_reset_tail_pointer(skb); 67af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg skb_reserve(skb, sdata->local->hw.extra_tx_headroom); 68469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 69b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(ifibss->bssid, bssid)) 70af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sta_info_flush(sdata->local, sdata); 71469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7249b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg /* if merging, indicate to driver that we leave the old IBSS */ 7349b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg if (sdata->vif.bss_conf.ibss_joined) { 7449b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 7586a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 7649b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS); 7749b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg } 7849b5c7f473f1bbcb30275dcaee2c06dfb8ec2279Johannes Berg 79469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(ifibss->bssid, bssid, ETH_ALEN); 80469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 81af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; 82469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 83ba1960257c5980f9b58057995ce3394bd8e48ca3Eliad Peller local->oper_channel = chan; 8413c40c54682ffe62977f670681268a26d500d6faAlexander Simon channel_type = ifibss->channel_type; 85d58e7e37aac0465b08527adadc8016421bd4060eJohannes Berg if (!cfg80211_can_beacon_sec_chan(local->hw.wiphy, chan, channel_type)) 8613c40c54682ffe62977f670681268a26d500d6faAlexander Simon channel_type = NL80211_CHAN_HT20; 8713c40c54682ffe62977f670681268a26d500d6faAlexander Simon if (!ieee80211_set_channel_type(local, sdata, channel_type)) { 8813c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* can only fail due to HT40+/- mismatch */ 8913c40c54682ffe62977f670681268a26d500d6faAlexander Simon channel_type = NL80211_CHAN_HT20; 9013c40c54682ffe62977f670681268a26d500d6faAlexander Simon WARN_ON(!ieee80211_set_channel_type(local, sdata, 9113c40c54682ffe62977f670681268a26d500d6faAlexander Simon NL80211_CHAN_HT20)); 9213c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 93af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); 9457c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 95af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sband = local->hw.wiphy->bands[chan->band]; 96469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 97b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg /* build supported rates array */ 98b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg pos = supp_rates; 99b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < sband->n_bitrates; i++) { 100b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rate = sband->bitrates[i].bitrate; 101b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u8 basic = 0; 102b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (basic_rates & BIT(i)) 103b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic = 0x80; 104b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg *pos++ = basic | (u8) (rate / 5); 105b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 106b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 107469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Build IBSS probe response */ 108af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mgmt = (void *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); 109469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); 110469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 111469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_STYPE_PROBE_RESP); 112e83e6541cee0a12bc445b0f4fad5214df5803087Johannes Berg eth_broadcast_addr(mgmt->da); 11347846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 114469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 11557c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); 116707c1b4e68a2811ff2c9e75750a98a3310789a2dSujith mgmt->u.beacon.timestamp = cpu_to_le64(tsf); 117469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt->u.beacon.capab_info = cpu_to_le16(capability); 118469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 119469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + ifibss->ssid_len); 120469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SSID; 121469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = ifibss->ssid_len; 122469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, ifibss->ssid, ifibss->ssid_len); 123469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 124b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg rates = sband->n_bitrates; 125469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (rates > 8) 126469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rates = 8; 127469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + rates); 128469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_SUPP_RATES; 129469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = rates; 130469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, supp_rates, rates); 131469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 132469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sband->band == IEEE80211_BAND_2GHZ) { 133469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + 1); 134469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_DS_PARAMS; 135469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 1; 136af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 137469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 138469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 139469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + 2); 140469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_IBSS_PARAMS; 141469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 2; 142469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* FIX: set ATIM window based on scan results */ 143469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 144469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = 0; 145469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 146b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (sband->n_bitrates > 8) { 147b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg rates = sband->n_bitrates - 8; 148469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = skb_put(skb, 2 + rates); 149469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = WLAN_EID_EXT_SUPP_RATES; 150469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg *pos++ = rates; 151469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(pos, &supp_rates[8], rates); 152469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 153469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 154af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->ie_len) 155af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(skb_put(skb, ifibss->ie_len), 156af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ifibss->ie, ifibss->ie_len); 157af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 15813c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* add HT capability and information IEs */ 15913c40c54682ffe62977f670681268a26d500d6faAlexander Simon if (channel_type && sband->ht_cap.ht_supported) { 16013c40c54682ffe62977f670681268a26d500d6faAlexander Simon pos = skb_put(skb, 4 + 16113c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(struct ieee80211_ht_cap) + 162074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg sizeof(struct ieee80211_ht_operation)); 16313c40c54682ffe62977f670681268a26d500d6faAlexander Simon pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 16413c40c54682ffe62977f670681268a26d500d6faAlexander Simon sband->ht_cap.cap); 1650d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan /* 1660d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * Note: According to 802.11n-2009 9.13.3.1, HT Protection 1670d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * field and RIFS Mode are reserved in IBSS mode, therefore 1680d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan * keep them at 0 1690d894ec5017f7f463254e24fd2206e41d13cadffAshok Nagarajan */ 170074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, 171431e31542383b71bc5f2642572a1e6ef07f1bb87Ashok Nagarajan chan, channel_type, 0); 17213c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 17313c40c54682ffe62977f670681268a26d500d6faAlexander Simon 17432c5057b22a60b23353dda93c57e475856ca286cJohannes Berg if (local->hw.queues >= IEEE80211_NUM_ACS) { 1759eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf pos = skb_put(skb, 9); 1769eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = WLAN_EID_VENDOR_SPECIFIC; 1779eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 7; /* len */ 1789eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ 1799eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0x50; 1809eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0xf2; 1819eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 2; /* WME */ 1829eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* WME info */ 1839eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 1; /* WME ver */ 1849eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf *pos++ = 0; /* U-APSD no in use */ 1859eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 1869eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 187cf778b00e96df6d64f8e21b8395d1f8a859ecdc7Eric Dumazet rcu_assign_pointer(ifibss->presp, skb); 188469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1892d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg sdata->vif.bss_conf.beacon_int = beacon_int; 190fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->vif.bss_conf.basic_rates = basic_rates; 1912d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change = BSS_CHANGED_BEACON_INT; 1922d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= ieee80211_reset_erp_info(sdata); 1932d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BSSID; 1942d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON; 1952d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg bss_change |= BSS_CHANGED_BEACON_ENABLED; 196392cfdb10dab6c7dfa5fed18d8a44d7453d42196Teemu Paasikivi bss_change |= BSS_CHANGED_BASIC_RATES; 19713c40c54682ffe62977f670681268a26d500d6faAlexander Simon bss_change |= BSS_CHANGED_HT; 1988fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg bss_change |= BSS_CHANGED_IBSS; 1998fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = true; 2002d0ddec5b2b859f06116f631fc0ffe94fbceb556Johannes Berg ieee80211_bss_info_change_notify(sdata, bss_change); 201469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 202b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); 203469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 204469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ifibss->state = IEEE80211_IBSS_MLME_JOINED; 205af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 206af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 207469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 208273686d664daae1aa728b76e45720273b26dd876Johannes Berg bss = cfg80211_inform_bss_frame(local->hw.wiphy, chan, 209f446d10f214091408b7300f15c9adf60569edf28Johannes Berg mgmt, skb->len, 0, GFP_KERNEL); 210f446d10f214091408b7300f15c9adf60569edf28Johannes Berg cfg80211_put_bss(bss); 21186a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_on(sdata->dev); 212af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); 213469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 214469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 215af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 216af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_bss *bss) 217469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 2180c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss = 2190c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg container_of((void *)bss, struct cfg80211_bss, priv); 220b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg struct ieee80211_supported_band *sband; 221b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg u32 basic_rates; 222b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int i, j; 2230c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg u16 beacon_int = cbss->beacon_interval; 22457c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2257a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&sdata->u.ibss.mtx); 2267a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 22757c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg if (beacon_int < 10) 22857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int = 10; 22957c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 2300c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; 231b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 232b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates = 0; 233b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 234b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (i = 0; i < bss->supp_rates_len; i++) { 235b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg int rate = (bss->supp_rates[i] & 0x7f) * 5; 236b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg bool is_basic = !!(bss->supp_rates[i] & 0x80); 237b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 238b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg for (j = 0; j < sband->n_bitrates; j++) { 239b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (sband->bitrates[j].bitrate == rate) { 240b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg if (is_basic) 241b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates |= BIT(j); 242b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg break; 243b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 244b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 245b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg } 246b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg 2470c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg __ieee80211_sta_join_ibss(sdata, cbss->bssid, 24857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg beacon_int, 2490c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->channel, 250b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg basic_rates, 2510c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->capability, 2520c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss->tsf); 253469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 254469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 2556d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartullistatic struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta, 2566d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli bool auth) 2578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 2588bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 2598bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_sub_if_data *sdata = sta->sdata; 2608bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u8 addr[ETH_ALEN]; 2618bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2628bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg memcpy(addr, sta->sta.addr, ETH_ALEN); 2638bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 264bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); 2658bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 26683d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 26783d5cc012441531ab0bf6f99881958e964e9cf11Johannes Berg sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 268267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli /* authorize the station only if the network is not RSN protected. If 269267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli * not wait for the userspace to authorize it */ 270267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli if (!sta->sdata->u.ibss.control_port) 271267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 2728bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2738bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rate_control_rate_init(sta); 2748bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2758bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* If it fails, maybe we raced another insertion? */ 2768bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (sta_info_insert_rcu(sta)) 2778bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta_info_get(sdata, addr); 278452a6d22615bb8262a932b362f41fc5d89f03293Will Hawkins if (auth && !sdata->u.ibss.auth_frame_registrations) { 279bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 280bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "TX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=1)\n", 281bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata->vif.addr, sdata->u.ibss.bssid, addr); 2826d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli ieee80211_send_auth(sdata, 1, WLAN_AUTH_OPEN, NULL, 0, 2836d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli addr, sdata->u.ibss.bssid, NULL, 0, 0); 2846d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli } 2858bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return sta; 2868bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 2878bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2888bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergstatic struct sta_info * 2898bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, 2908bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg const u8 *bssid, const u8 *addr, 2916d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli u32 supp_rates, bool auth) 2928bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg __acquires(RCU) 2938bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg{ 2948bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 2958bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct ieee80211_local *local = sdata->local; 2968bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 297273686d664daae1aa728b76e45720273b26dd876Johannes Berg int band = local->oper_channel->band; 2988bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 2998bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* 3008bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * XXX: Consider removing the least recently used entry and 3018bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg * allow new one to be added. 3028bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg */ 3038bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 304bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 305e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 3068bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3078bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3088bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3098bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3108bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { 3118bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3128bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3138bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3148bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 315b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { 3168bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3178bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3188bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3198bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3208bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_KERNEL); 3218bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg if (!sta) { 3228bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_lock(); 3238bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return NULL; 3248bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 3258bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3268bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->last_rx = jiffies; 3278bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3288bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg /* make sure mandatory rates are always added */ 3298bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta->sta.supp_rates[band] = supp_rates | 3308bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg ieee80211_mandatory_rates(local, band); 3318bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 3326d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return ieee80211_ibss_finish_sta(sta, auth); 3336d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli} 3346d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3356d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartullistatic void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, 3366d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli struct ieee80211_mgmt *mgmt, 3376d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli size_t len) 3386d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli{ 3396d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli u16 auth_alg, auth_transaction; 3406d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3416d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli lockdep_assert_held(&sdata->u.ibss.mtx); 3426d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3436d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli if (len < 24 + 6) 3446d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return; 3456d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3466d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3476d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3486d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3496d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) 3506d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli return; 351bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 352bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", 353bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); 3546d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli sta_info_destroy_addr(sdata, mgmt->sa); 3556d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 0, false); 3566d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli rcu_read_unlock(); 3576d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli 3586d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli /* 3596d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * IEEE 802.11 standard does not require authentication in IBSS 3606d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * networks and most implementations do not seem to use it. 3616d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * However, try to reply to authentication attempts if someone 3626d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli * has actually implemented this. 3636d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli */ 3646d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, NULL, 0, 3656d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0); 3668bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg} 3678bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 368469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 369469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 370469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len, 371469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status, 372469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems *elems, 373469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bool beacon) 374469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 375469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 376469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int freq; 3770c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 378469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_bss *bss; 379469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 380469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_channel *channel; 381469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u64 beacon_timestamp, rx_timestamp; 382469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u32 supp_rates = 0; 383469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg enum ieee80211_band band = rx_status->band; 38413c40c54682ffe62977f670681268a26d500d6faAlexander Simon struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 38513c40c54682ffe62977f670681268a26d500d6faAlexander Simon bool rates_updated = false; 386469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 387469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ds_params && elems->ds_params_len == 1) 38859eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf freq = ieee80211_channel_to_frequency(elems->ds_params[0], 38959eb21a6504731fc16db4cf9463065dd61093e08Bruno Randolf band); 390469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 391469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg freq = rx_status->freq; 392469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 393469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg channel = ieee80211_get_channel(local->hw.wiphy, freq); 394469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 395469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 396469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 397469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 3989eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 399b203ca39126bad99583c908be587df067820a1eaJoe Perches ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { 400469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 401469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 402abe60632f311d515b082b450504ee24006023951Johannes Berg sta = sta_info_get(sdata, mgmt->sa); 403469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4049eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (elems->supp_rates) { 4059eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf supp_rates = ieee80211_sta_get_rates(local, elems, 4069ebb61a23d90703344fc609fbee8da67b1e7456cAshok Nagarajan band, NULL); 4079eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta) { 4089eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf u32 prev_rates; 4099eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 4109eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf prev_rates = sta->sta.supp_rates[band]; 4119eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf /* make sure mandatory rates are always added */ 4129eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf sta->sta.supp_rates[band] = supp_rates | 4139eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf ieee80211_mandatory_rates(local, band); 414469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4159eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta->sta.supp_rates[band] != prev_rates) { 416bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 417bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", 418bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.addr, prev_rates, 419bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sta->sta.supp_rates[band]); 42013c40c54682ffe62977f670681268a26d500d6faAlexander Simon rates_updated = true; 4219eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf } 4228bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } else { 4238bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 4249eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, 4256d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli mgmt->sa, supp_rates, true); 4268bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 42734e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg } 4289eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 4299eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf if (sta && elems->wmm_info) 430c2c98fdeb5c897499644eb247285c8e3dacc6450Johannes Berg set_sta_flag(sta, WLAN_STA_WME); 4319eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf 432074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg if (sta && elems->ht_operation && elems->ht_cap_elem && 43313c40c54682ffe62977f670681268a26d500d6faAlexander Simon sdata->u.ibss.channel_type != NL80211_CHAN_NO_HT) { 43413c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* we both use HT */ 43513c40c54682ffe62977f670681268a26d500d6faAlexander Simon struct ieee80211_sta_ht_cap sta_ht_cap_new; 43613c40c54682ffe62977f670681268a26d500d6faAlexander Simon enum nl80211_channel_type channel_type = 437074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg ieee80211_ht_oper_to_channel_type( 438074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg elems->ht_operation); 43913c40c54682ffe62977f670681268a26d500d6faAlexander Simon 44013c40c54682ffe62977f670681268a26d500d6faAlexander Simon ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 44113c40c54682ffe62977f670681268a26d500d6faAlexander Simon elems->ht_cap_elem, 44213c40c54682ffe62977f670681268a26d500d6faAlexander Simon &sta_ht_cap_new); 44313c40c54682ffe62977f670681268a26d500d6faAlexander Simon 44413c40c54682ffe62977f670681268a26d500d6faAlexander Simon /* 44513c40c54682ffe62977f670681268a26d500d6faAlexander Simon * fall back to HT20 if we don't use or use 44613c40c54682ffe62977f670681268a26d500d6faAlexander Simon * the other extension channel 44713c40c54682ffe62977f670681268a26d500d6faAlexander Simon */ 4486741e7f048dacc92e37c5d724ff5c64e45f6c2c9Felix Fietkau if (!(channel_type == NL80211_CHAN_HT40MINUS || 4496741e7f048dacc92e37c5d724ff5c64e45f6c2c9Felix Fietkau channel_type == NL80211_CHAN_HT40PLUS) || 45013c40c54682ffe62977f670681268a26d500d6faAlexander Simon channel_type != sdata->u.ibss.channel_type) 45113c40c54682ffe62977f670681268a26d500d6faAlexander Simon sta_ht_cap_new.cap &= 45213c40c54682ffe62977f670681268a26d500d6faAlexander Simon ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 45313c40c54682ffe62977f670681268a26d500d6faAlexander Simon 45413c40c54682ffe62977f670681268a26d500d6faAlexander Simon if (memcmp(&sta->sta.ht_cap, &sta_ht_cap_new, 45513c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(sta_ht_cap_new))) { 45613c40c54682ffe62977f670681268a26d500d6faAlexander Simon memcpy(&sta->sta.ht_cap, &sta_ht_cap_new, 45713c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(sta_ht_cap_new)); 45813c40c54682ffe62977f670681268a26d500d6faAlexander Simon rates_updated = true; 45913c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 46013c40c54682ffe62977f670681268a26d500d6faAlexander Simon } 46113c40c54682ffe62977f670681268a26d500d6faAlexander Simon 462e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli if (sta && rates_updated) { 463e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli drv_sta_rc_update(local, sdata, &sta->sta, 464e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli IEEE80211_RC_SUPP_RATES_CHANGED); 46513c40c54682ffe62977f670681268a26d500d6faAlexander Simon rate_control_rate_init(sta); 466e687f61eedab8895e5669cb82cebe0253631cd8cAntonio Quartulli } 46713c40c54682ffe62977f670681268a26d500d6faAlexander Simon 4689eba612549f575d7dccda672ce932e15e7392d83Bruno Randolf rcu_read_unlock(); 469469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 470469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 471469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 472469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg channel, beacon); 473469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!bss) 474469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 475469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 4760c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = container_of((void *)bss, struct cfg80211_bss, priv); 4770c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 478469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* was just updated in ieee80211_bss_info_update */ 4790c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg beacon_timestamp = cbss->tsf; 480469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 481469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* check if we need to merge IBSS */ 482469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 483469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* we use a fixed BSSID */ 484a98bfec2985221d8e0904a526cbe88590eaad2a6Benoit Papillault if (sdata->u.ibss.fixed_bssid) 485469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 486469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 487469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* not an IBSS */ 4880c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) 489469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 490469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 491469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different channel */ 4920c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (cbss->channel != local->oper_channel) 493469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 494469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 495469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* different SSID */ 496469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (elems->ssid_len != sdata->u.ibss.ssid_len || 497469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcmp(elems->ssid, sdata->u.ibss.ssid, 498469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->u.ibss.ssid_len)) 499469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg goto put_bss; 500469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 50134e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen /* same BSSID */ 502b203ca39126bad99583c908be587df067820a1eaJoe Perches if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) 50334e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen goto put_bss; 50434e8f08231388f9e16c6f1e2461f53afaf7f1e5eAlina Friedrichsen 5056ebacbb79d2d05978ba50a24d8cbe2a76ff2014cJohannes Berg if (rx_status->flag & RX_FLAG_MACTIME_MPDU) { 506469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* 507469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * For correct IBSS merging we need mactime; since mactime is 508469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * defined as the time the first data symbol of the frame hits 509469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * the PHY, and the timestamp of the beacon is defined as "the 510469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * time that the data symbol containing the first bit of the 511469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * timestamp is transmitted to the PHY plus the transmitting 512469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * STA's delays through its local PHY from the MAC-PHY 513469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * interface to its interface with the WM" (802.11 11.1.2) 514469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * - equals the time this bit arrives at the receiver - we have 515469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * to take into account the offset between the two. 516469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * 517469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * E.g. at 1 MBit that means mactime is 192 usec earlier 518469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * (=24 bytes * 8 usecs/byte) than the beacon timestamp. 519469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg */ 520469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int rate; 521469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 522469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (rx_status->flag & RX_FLAG_HT) 523469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rate = 65; /* TODO: HT rates */ 524469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 525469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rate = local->hw.wiphy->bands[band]-> 526469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bitrates[rx_status->rate_idx].bitrate; 527469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 528469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); 5292448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } else { 5302448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg /* 5312448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * second best option: get current TSF 5322448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg * (will return -1 if not supported) 5332448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg */ 53437a41b4affa33bb237d3692bf51f1b5ebcaf29d8Eliad Peller rx_timestamp = drv_get_tsf(local, sdata); 5352448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg } 536469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 537bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 538bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", 539bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->bssid, 540bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)rx_timestamp, 541bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)beacon_timestamp, 542bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg (unsigned long long)(rx_timestamp - beacon_timestamp), 543bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg jiffies); 544469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 545469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (beacon_timestamp > rx_timestamp) { 546bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 547bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", 548bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->bssid); 549469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_join_ibss(sdata, bss); 5509ebb61a23d90703344fc609fbee8da67b1e7456cAshok Nagarajan supp_rates = ieee80211_sta_get_rates(local, elems, band, NULL); 55134e895075e21be3e21e71d6317440d1ee7969ad0Johannes Berg ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, 5526d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli supp_rates, true); 5538bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 554469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 555469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 556469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg put_bss: 557469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 558469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 559469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5608bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Bergvoid ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, 5618bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg const u8 *bssid, const u8 *addr, 5628bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg u32 supp_rates) 563469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 5642e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 565469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 566469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 567273686d664daae1aa728b76e45720273b26dd876Johannes Berg int band = local->oper_channel->band; 568469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 569af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* 570af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * XXX: Consider removing the least recently used entry and 571af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg * allow new one to be added. 572af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg */ 573469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { 574bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", 575e87cc4728f0e2fb663e592a1141742b1d6c63256Joe Perches sdata->name, addr); 5768bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 577469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 578469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5792e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) 5808bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 5812e10d330f8d5f039fa1e00baf59435ab0f11c722Felix Fietkau 582b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) 5838bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 584469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5858bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); 586469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!sta) 5878bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg return; 588469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 589c8716d9dc13c7f6ee92f2bfc6cc3b723b417bff8Rajkumar Manoharan sta->last_rx = jiffies; 590d9a7ddb05e5419ca5e4b54f57074dc33c7ea991cJohannes Berg 591469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* make sure mandatory rates are always added */ 592469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sta->sta.supp_rates[band] = supp_rates | 593469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_mandatory_rates(local, band); 594469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 5958bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock(&ifibss->incomplete_lock); 5968bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_add(&sta->list, &ifibss->incomplete_stations); 5978bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock(&ifibss->incomplete_lock); 5988bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 599469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 600469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 601469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) 602469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 603469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 604469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active = 0; 605469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sta_info *sta; 606469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6077a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&sdata->u.ibss.mtx); 6087a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 609469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_lock(); 610469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 611469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg list_for_each_entry_rcu(sta, &local->sta_list, list) { 612469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (sta->sdata == sdata && 613469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, 614469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg jiffies)) { 615469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active++; 616469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 617469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 618469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 619469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 620469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rcu_read_unlock(); 621469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 622469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return active; 623469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 624469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 625ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 626ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_JOINED 627ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 628469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 629469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) 630469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 631469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 632469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6337a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 6347a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 635af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 636af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); 637469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 638469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); 639af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 640450aae3d7b60a970f266349a837dfb30a539198bSujith if (time_before(jiffies, ifibss->last_scan_completed + 641450aae3d7b60a970f266349a837dfb30a539198bSujith IEEE80211_IBSS_MERGE_INTERVAL)) 642450aae3d7b60a970f266349a837dfb30a539198bSujith return; 643450aae3d7b60a970f266349a837dfb30a539198bSujith 644469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ieee80211_sta_active_ibss(sdata)) 645469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 646469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 647c037b8367c7e2b775a99d74037f5df014d2fbf06John W. Linville if (ifibss->fixed_channel) 648469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 649469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 650bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 651bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); 652469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 653be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ieee80211_request_internal_scan(sdata, 654c037b8367c7e2b775a99d74037f5df014d2fbf06John W. Linville ifibss->ssid, ifibss->ssid_len, NULL); 655469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 656469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 657af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) 658469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 659469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 660469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 bssid[ETH_ALEN]; 661469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 capability; 662469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int i; 663469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 6647a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 6657a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 666af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) { 667469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(bssid, ifibss->bssid, ETH_ALEN); 668469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } else { 669469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Generate random, not broadcast, locally administered BSSID. Mix in 670469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * own MAC address to make sure that devices that do not have proper 671469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * random number generator get different BSSID. */ 672469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg get_random_bytes(bssid, ETH_ALEN); 673469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg for (i = 0; i < ETH_ALEN; i++) 67447846c9b0c10808d9337d2e7d09361f3e0a0a71aJohannes Berg bssid[i] ^= sdata->vif.addr[i]; 675469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] &= ~0x01; 676469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid[0] |= 0x02; 677469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 678469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 679bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); 680469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 681469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability = WLAN_CAPABILITY_IBSS; 682469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 683fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 684469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 685469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg else 686469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg sdata->drop_unencrypted = 0; 687469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 68857c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, 689fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi ifibss->channel, ifibss->basic_rates, 690b59066a291ca7c12a1e5b58f3ada5ab6e32cb6bdJohannes Berg capability, 0); 691469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 692469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 693ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault/* 694ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault * This function is called with state == IEEE80211_IBSS_MLME_SEARCH 695ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault */ 696ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault 697af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergstatic void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) 698469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 699469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 700469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 7010c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct cfg80211_bss *cbss; 702af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_channel *chan = NULL; 703469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg const u8 *bssid = NULL; 704469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int active_ibss; 705e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg u16 capability; 706469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7077a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 7087a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 709469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg active_ibss = ieee80211_sta_active_ibss(sdata); 710bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); 711469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 712469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (active_ibss) 713af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 714469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 715e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability = WLAN_CAPABILITY_IBSS; 716fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg if (ifibss->privacy) 717e0d61887c2ee19bb63f6a8c0e2c149184e879501Johannes Berg capability |= WLAN_CAPABILITY_PRIVACY; 718af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_bssid) 719af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg bssid = ifibss->bssid; 720af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (ifibss->fixed_channel) 721af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg chan = ifibss->channel; 722af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!is_zero_ether_addr(ifibss->bssid)) 723469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg bssid = ifibss->bssid; 7240c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, 7250c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg ifibss->ssid, ifibss->ssid_len, 7260c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, 7270c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg capability); 7280c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg 7290c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg if (cbss) { 7300c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg struct ieee80211_bss *bss; 731469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7320c1ad2cac1cb54db38fd4cc1822965071ee83f6eJohannes Berg bss = (void *)cbss->priv; 733bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 734bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "sta_find_ibss: selected %pM current %pM\n", 735bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid, ifibss->bssid); 736bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, 737bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "Selected IBSS BSSID %pM based on configured SSID\n", 738bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg cbss->bssid); 739469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 740af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_sta_join_ibss(sdata, bss); 741469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_put(local, bss); 742af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 743d419b9f0fa69e79ccba3e5e79a58a52ae0c2ed6aReinette Chatre } 744469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 745bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); 746469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 747469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Selected IBSS not found in current scan results - try to scan */ 748ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault if (time_after(jiffies, ifibss->last_scan_completed + 749469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_SCAN_INTERVAL)) { 750bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); 751469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 752be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ieee80211_request_internal_scan(sdata, 753be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ifibss->ssid, ifibss->ssid_len, 754be4a4b6a5d2f76393f545a2545fbaa1b65577e13Johannes Berg ifibss->fixed_channel ? ifibss->channel : NULL); 755ce9058aedd75f14785400dcc49a2bc352ca38871Benoit Papillault } else { 756469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg int interval = IEEE80211_SCAN_INTERVAL; 757469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 758469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (time_after(jiffies, ifibss->ibss_join_req + 759469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg IEEE80211_IBSS_JOIN_TIMEOUT)) { 760af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (!(local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS)) { 761af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg ieee80211_sta_create_ibss(sdata); 762af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return; 763af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } 764bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg sdata_info(sdata, "IBSS not allowed on %d MHz\n", 765273686d664daae1aa728b76e45720273b26dd876Johannes Berg local->oper_channel->center_freq); 766469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 767469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* No IBSS found - decrease scan interval and continue 768469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg * scanning. */ 769469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg interval = IEEE80211_SCAN_INTERVAL_SLOW; 770469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 771469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 772af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg mod_timer(&ifibss->timer, 773af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg round_jiffies(jiffies + interval)); 774469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 775469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 776469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 777469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, 778c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct sk_buff *req) 779469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 780c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg struct ieee80211_mgmt *mgmt = (void *)req->data; 781469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 782469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 783c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg int tx_last_beacon, len = req->len; 784469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct sk_buff *skb; 785469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *resp; 78640b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg struct sk_buff *presp; 787469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u8 *pos, *end; 788469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7897a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg lockdep_assert_held(&ifibss->mtx); 7907a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 79140b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg presp = rcu_dereference_protected(ifibss->presp, 79240b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg lockdep_is_held(&ifibss->mtx)); 79340b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg 794469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || 79540b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg len < 24 + 2 || !presp) 796469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 797469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 7982448798133d747ad339e57099e32a1d1e68aca1cJohannes Berg tx_last_beacon = drv_tx_last_beacon(local); 799469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 800bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, 801bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", 802bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); 803469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8041ed76487ce115110171480deabd3cd4656f9803eFelix Fietkau if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) 805469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 806469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 807b203ca39126bad99583c908be587df067820a1eaJoe Perches if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && 808888d04dfbe7e09f930fdaafb257cce2c54c9c3f3Felix Fietkau !is_broadcast_ether_addr(mgmt->bssid)) 809469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 810469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 811469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg end = ((u8 *) mgmt) + len; 812469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos = mgmt->u.probe_req.variable; 813469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[0] != WLAN_EID_SSID || 814469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg pos + 2 + pos[1] > end) { 815bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", 816bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg mgmt->sa); 817469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 818469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 819469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (pos[1] != 0 && 820469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (pos[1] != ifibss->ssid_len || 8210da780c269957783d341fc3559e6b4c9912af7b4Benoit Papillault memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { 822469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Ignore ProbeReq for foreign SSID */ 823469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 824469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 825469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 826469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Reply with ProbeResp */ 82740b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg skb = skb_copy(presp, GFP_KERNEL); 828469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (!skb) 829469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 830469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 831469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg resp = (struct ieee80211_mgmt *) skb->data; 832469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg memcpy(resp->da, mgmt->sa, ETH_ALEN); 833bdcbd8e0e3ffdad32b14b6373e67bfcf5fd3f002Johannes Berg ibss_dbg(sdata, "Sending ProbeResp to %pM\n", resp->da); 83462ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 83562ae67be31c2346b6d74653a148ddbd1b9a94424Johannes Berg ieee80211_tx_skb(sdata, skb); 836469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 837469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 838469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 839469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 840469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len, 841469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status) 842469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 843469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t baselen; 844469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems elems; 845469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 846469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 847469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (baselen > len) 848469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 849469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 850469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 851469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg &elems); 852469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 853469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); 854469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 855469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 856469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 857469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt, 858469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t len, 859469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status) 860469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 861469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg size_t baselen; 862469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee802_11_elems elems; 863469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 864469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg /* Process beacon from the current BSS */ 865469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 866469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg if (baselen > len) 867469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg return; 868469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 869469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); 870469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 871469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); 872469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 873469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8741fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8751fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct sk_buff *skb) 876469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 877469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_rx_status *rx_status; 878469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_mgmt *mgmt; 879469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg u16 fc; 880469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 881f1d58c2521eb160178b2151d6326d8dc5d7c8560Johannes Berg rx_status = IEEE80211_SKB_RXCB(skb); 882469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg mgmt = (struct ieee80211_mgmt *) skb->data; 883469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg fc = le16_to_cpu(mgmt->frame_control); 884469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 8857a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 8867a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 887c926d006c1514cfb3572893f41f2324e96823661Tim Harvey if (!sdata->u.ibss.ssid_len) 888c926d006c1514cfb3572893f41f2324e96823661Tim Harvey goto mgmt_out; /* not ready to merge yet */ 889c926d006c1514cfb3572893f41f2324e96823661Tim Harvey 890469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (fc & IEEE80211_FCTL_STYPE) { 891469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_REQ: 892c269a20393500e84e8cbae23ca6d65e1107433c4Johannes Berg ieee80211_rx_mgmt_probe_req(sdata, skb); 893469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 894469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_PROBE_RESP: 895469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, 896469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rx_status); 897469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 898469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_BEACON: 899469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, 900469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg rx_status); 901469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 902469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_STYPE_AUTH: 903469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); 904469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 905469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 9067a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 907c926d006c1514cfb3572893f41f2324e96823661Tim Harvey mgmt_out: 9087a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&sdata->u.ibss.mtx); 909469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 910469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9111fa57d017366fb26b58af110a38b36a4f0214a62Johannes Bergvoid ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) 912469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 9131fa57d017366fb26b58af110a38b36a4f0214a62Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 9148bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 915469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9167a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&ifibss->mtx); 9177a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 9187a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg /* 9197a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * Work could be scheduled after scan or similar 9207a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * when we aren't even joined (or trying) with a 9217a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg * network. 9227a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg */ 9237a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg if (!ifibss->ssid_len) 9247a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg goto out; 925469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9268bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 9278bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 9288bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 9298bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 9308bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 9318bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 9328bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 9336d810f10325522cfcf498dc6d64b9f96e1f5153fAntonio Quartulli ieee80211_ibss_finish_sta(sta, true); 9348bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg rcu_read_unlock(); 9358bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 9368bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 9378bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 9388bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 939469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg switch (ifibss->state) { 940469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_SEARCH: 941469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_find_ibss(sdata); 942469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 943469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg case IEEE80211_IBSS_MLME_JOINED: 944469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg ieee80211_sta_merge_ibss(sdata); 945469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 946469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg default: 947469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg WARN_ON(1); 948469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg break; 949469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 950469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9517a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg out: 9527a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&ifibss->mtx); 9533a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg} 9543a4d4aa2d38e5305b5e93dffdc9dd2f975129328Johannes Berg 955469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergstatic void ieee80211_ibss_timer(unsigned long data) 956469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 957469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_sub_if_data *sdata = 958469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (struct ieee80211_sub_if_data *) data; 959469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 960469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_local *local = sdata->local; 961469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9625bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (local->quiescing) { 9635bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = true; 9645bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg return; 9655bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg } 9665bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 9677a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 968469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 969469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 9705bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg#ifdef CONFIG_PM 9715bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata) 9725bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 9735bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 9745bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 9755bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (del_timer_sync(&ifibss->timer)) 9765bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = true; 9775bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 9785bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 9795bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Bergvoid ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata) 9805bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg{ 9815bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 9825bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 9835bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg if (ifibss->timer_running) { 9845bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg add_timer(&ifibss->timer); 9855bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg ifibss->timer_running = false; 9865bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg } 9875bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg} 9885bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg#endif 9895bb644a0fd25a5e083ecbfaa92a211db99aa6ef7Johannes Berg 990469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) 991469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 992469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 993469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 994469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg setup_timer(&ifibss->timer, ieee80211_ibss_timer, 995469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg (unsigned long) sdata); 9967a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_init(&ifibss->mtx); 9978bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg INIT_LIST_HEAD(&ifibss->incomplete_stations); 9988bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_init(&ifibss->incomplete_lock); 999469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1000469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1001469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg/* scan finished notification */ 1002469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Bergvoid ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) 1003469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg{ 1004af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct ieee80211_sub_if_data *sdata; 1005469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 100629b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_lock(&local->iflist_mtx); 100729b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg list_for_each_entry(sdata, &local->interfaces, list) { 10089607e6b66a0d25ca63b70d54a4283fa13d8f7c9dJohannes Berg if (!ieee80211_sdata_running(sdata)) 10090e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg continue; 1010af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (sdata->vif.type != NL80211_IFTYPE_ADHOC) 1011af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg continue; 1012af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.last_scan_completed = jiffies; 10137a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg ieee80211_queue_work(&local->hw, &sdata->work); 1014469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg } 101529b4a4f7c7b588b5568edd0da42f38623b81fc66Johannes Berg mutex_unlock(&local->iflist_mtx); 1016469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg} 1017469002983fc90c2ff0959e2b03335c0fe2e4d5a9Johannes Berg 1018af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, 1019af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct cfg80211_ibss_params *params) 1020af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 1021af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct sk_buff *skb; 1022ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich u32 changed = 0; 1023af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 10247a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + 102513c40c54682ffe62977f670681268a26d500d6faAlexander Simon sizeof(struct ieee80211_hdr_3addr) + 102613c40c54682ffe62977f670681268a26d500d6faAlexander Simon 12 /* struct ieee80211_mgmt.u.beacon */ + 102713c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + 102813c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + 8 /* max Supported Rates */ + 102913c40c54682ffe62977f670681268a26d500d6faAlexander Simon 3 /* max DS params */ + 103013c40c54682ffe62977f670681268a26d500d6faAlexander Simon 4 /* IBSS params */ + 103113c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 103213c40c54682ffe62977f670681268a26d500d6faAlexander Simon 2 + sizeof(struct ieee80211_ht_cap) + 1033074d46d1d23f27488a3f314e29cae2453541f17dJohannes Berg 2 + sizeof(struct ieee80211_ht_operation) + 10347a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg params->ie_len); 10357a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg if (!skb) 10367a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg return -ENOMEM; 10377a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 10387a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 10397a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 1040af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg if (params->bssid) { 1041af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); 1042af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = true; 1043af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg } else 1044af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_bssid = false; 1045af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1046fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg sdata->u.ibss.privacy = params->privacy; 1047267335d63b808dc861f3a4dc81a605489a8a13acAntonio Quartulli sdata->u.ibss.control_port = params->control_port; 1048fbd2c8dcbc69616d2e15b8a269a86b3a05d45aeaTeemu Paasikivi sdata->u.ibss.basic_rates = params->basic_rates; 1049dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, 1050dd5b4cc71cd09c33e1579cc6d5720656e94e52deFelix Fietkau sizeof(params->mcast_rate)); 1051fffd0934b9390f34bec45762192b7edd3b12b4b5Johannes Berg 105257c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg sdata->vif.bss_conf.beacon_int = params->beacon_interval; 105357c4d7b4c4986037be51476b8e3025d5ba18d8b8Johannes Berg 1054af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.channel = params->channel; 105513c40c54682ffe62977f670681268a26d500d6faAlexander Simon sdata->u.ibss.channel_type = params->channel_type; 1056af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.fixed_channel = params->channel_fixed; 1057af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1058adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg /* fix ourselves to that channel now already */ 1059adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg if (params->channel_fixed) { 1060adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg sdata->local->oper_channel = params->channel; 106113c40c54682ffe62977f670681268a26d500d6faAlexander Simon if (!ieee80211_set_channel_type(sdata->local, sdata, 1062fb03c5eb8c0bbf4561cb5aa72e0a9546e9574661Dan Carpenter params->channel_type)) { 1063fb03c5eb8c0bbf4561cb5aa72e0a9546e9574661Dan Carpenter mutex_unlock(&sdata->u.ibss.mtx); 1064cb71b8d80334add8991862f9fd36dc50874944ceSimon Wunderlich kfree_skb(skb); 106513c40c54682ffe62977f670681268a26d500d6faAlexander Simon return -EINVAL; 1066fb03c5eb8c0bbf4561cb5aa72e0a9546e9574661Dan Carpenter } 1067adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes Berg } 1068adfba3c7c026a6a5560d2a43fefc9b198cb74462Johannes 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.skb = skb; 1077af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; 1078af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sdata->u.ibss.ibss_join_req = jiffies; 1079af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 10800e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN); 10810e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg sdata->u.ibss.ssid_len = params->ssid_len; 10820e41f715c04f85a40ae6531d660be2241717be1cJohannes Berg 10837da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_unlock(&sdata->u.ibss.mtx); 10847da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg 10857da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_lock(&sdata->local->mtx); 10865cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(sdata->local); 10877da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_unlock(&sdata->local->mtx); 10885cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 1089ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich /* 1090ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is 1091ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * reserved, but an HT STA shall protect HT transmissions as though 1092ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * the HT Protection field were set to non-HT mixed mode. 1093ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * 1094ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * In an IBSS, the RIFS Mode field of the HT Operation element is 1095ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * also reserved, but an HT STA shall operate as though this field 1096ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich * were set to 1. 1097ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich */ 1098ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1099ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich sdata->vif.bss_conf.ht_operation_mode |= 1100ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED 1101ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich | IEEE80211_HT_PARAM_RIFS_MODE; 1102ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 1103ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich changed |= BSS_CHANGED_HT; 1104ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich ieee80211_bss_info_change_notify(sdata, changed); 1105ff3cc5f40f36db1a60a8f1051be7fbc92233419bSimon Wunderlich 110664592c8fc0e99d445fc3fdedddeb6088e20086f1Johannes Berg ieee80211_queue_work(&sdata->local->hw, &sdata->work); 1107af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1108af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1109af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1110af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1111af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Bergint ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) 1112af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg{ 1113af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg struct sk_buff *skb; 11145ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 11155ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct ieee80211_local *local = sdata->local; 11165ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi struct cfg80211_bss *cbss; 11175ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi u16 capability; 11187a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg int active_ibss; 11198bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info *sta; 11207a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 11217a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_lock(&sdata->u.ibss.mtx); 11225ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 1123f3209bea110cade12e2b133da8b8499689cb0e2eJohannes Berg sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; 1124f3209bea110cade12e2b133da8b8499689cb0e2eJohannes Berg memset(sdata->u.ibss.bssid, 0, ETH_ALEN); 1125f3209bea110cade12e2b133da8b8499689cb0e2eJohannes Berg sdata->u.ibss.ssid_len = 0; 1126f3209bea110cade12e2b133da8b8499689cb0e2eJohannes Berg 11275ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi active_ibss = ieee80211_sta_active_ibss(sdata); 11285ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11295ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { 11305ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability = WLAN_CAPABILITY_IBSS; 11315ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11325ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (ifibss->privacy) 11335ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability |= WLAN_CAPABILITY_PRIVACY; 11345ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11355ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel, 11365ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->bssid, ifibss->ssid, 11375ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi ifibss->ssid_len, WLAN_CAPABILITY_IBSS | 11385ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi WLAN_CAPABILITY_PRIVACY, 11395ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi capability); 11405ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi 11415ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi if (cbss) { 11425ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cfg80211_unlink_bss(local->hw.wiphy, cbss); 11435ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi cfg80211_put_bss(cbss); 11445ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 11455ea096c0c85e80335889539899af9a4717976e0bTeemu Paasikivi } 1146af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1147af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg sta_info_flush(sdata->local, sdata); 11488bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11498bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11508bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg while (!list_empty(&ifibss->incomplete_stations)) { 11518bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta = list_first_entry(&ifibss->incomplete_stations, 11528bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg struct sta_info, list); 11538bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg list_del(&sta->list); 11548bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11558bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 11568bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg sta_info_free(local, sta); 11578bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_lock_bh(&ifibss->incomplete_lock); 11588bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg } 11598bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg spin_unlock_bh(&ifibss->incomplete_lock); 11608bf11d8d081106c3cce8281a0150e716f8ac5d22Johannes Berg 116186a2ea4134b48f6371103cfceb521bf2d2bf76cdEliad Peller netif_carrier_off(sdata->dev); 1162af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1163af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg /* remove beacon */ 1164af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree(sdata->u.ibss.ie); 116540b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg skb = rcu_dereference_protected(sdata->u.ibss.presp, 116640b275b69ee660274b77fb612b0db31fd282fc3fJohannes Berg lockdep_is_held(&sdata->u.ibss.mtx)); 1167a9b3cd7f323b2e57593e7215362a7b02fc933e3aStephen Hemminger RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); 11688fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg sdata->vif.bss_conf.ibss_joined = false; 11698fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | 11708fc214ba958648ab111a173f2db7b0e1dfed5b11Johannes Berg BSS_CHANGED_IBSS); 1171af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg synchronize_rcu(); 1172af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg kfree_skb(skb); 1173af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 117435f20c14a103ca2c7062999e934a513b83d84de6Johannes Berg skb_queue_purge(&sdata->skb_queue); 11755cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg 1176bc05d19f4b884b1dbbce48912710ae3f972c89d2Johannes Berg del_timer_sync(&sdata->u.ibss.timer); 11777a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg 11787a17a33c0da37f8d24222c967550d19dabf13617Johannes Berg mutex_unlock(&sdata->u.ibss.mtx); 1179bc05d19f4b884b1dbbce48912710ae3f972c89d2Johannes Berg 11807da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_lock(&local->mtx); 11815cff20e6c5a6591a79d3b027af222870f52bb550Johannes Berg ieee80211_recalc_idle(sdata->local); 11827da7cc1d42d8ce02cca16df8c021e6d657f1f8fdJohannes Berg mutex_unlock(&local->mtx); 1183af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg 1184af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg return 0; 1185af8cdcd828ad751fae8e6cbfe94eef9f2f23b14bJohannes Berg} 1186