mirror of https://gitee.com/openkylin/linux.git
2641 lines
72 KiB
C
2641 lines
72 KiB
C
/*
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* BSS client mode implementation
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* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
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* Copyright 2004, Instant802 Networks, Inc.
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* Copyright 2005, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/if_arp.h>
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#include <linux/wireless.h>
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#include <linux/random.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/iw_handler.h>
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#include <net/mac80211.h>
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#include <asm/unaligned.h>
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#include "ieee80211_i.h"
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#include "rate.h"
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#include "led.h"
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#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
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#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
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#define IEEE80211_AUTH_MAX_TRIES 3
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#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
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#define IEEE80211_ASSOC_MAX_TRIES 3
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#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
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#define IEEE80211_PROBE_INTERVAL (60 * HZ)
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#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
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#define IEEE80211_SCAN_INTERVAL (2 * HZ)
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#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
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#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
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#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
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#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
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#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
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/* utils */
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static int ecw2cw(int ecw)
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{
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return (1 << ecw) - 1;
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}
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static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
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{
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u8 *end, *pos;
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pos = bss->ies;
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if (pos == NULL)
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return NULL;
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end = pos + bss->ies_len;
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while (pos + 1 < end) {
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if (pos + 2 + pos[1] > end)
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break;
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if (pos[0] == ie)
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return pos;
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pos += 2 + pos[1];
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}
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return NULL;
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}
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static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
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struct ieee80211_supported_band *sband,
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u64 *rates)
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{
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int i, j, count;
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*rates = 0;
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count = 0;
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for (i = 0; i < bss->supp_rates_len; i++) {
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int rate = (bss->supp_rates[i] & 0x7F) * 5;
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for (j = 0; j < sband->n_bitrates; j++)
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if (sband->bitrates[j].bitrate == rate) {
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*rates |= BIT(j);
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count++;
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break;
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}
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}
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return count;
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}
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/* also used by mesh code */
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u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
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struct ieee802_11_elems *elems,
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enum ieee80211_band band)
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{
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struct ieee80211_supported_band *sband;
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struct ieee80211_rate *bitrates;
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size_t num_rates;
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u64 supp_rates;
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int i, j;
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sband = local->hw.wiphy->bands[band];
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if (!sband) {
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WARN_ON(1);
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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}
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bitrates = sband->bitrates;
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num_rates = sband->n_bitrates;
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supp_rates = 0;
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for (i = 0; i < elems->supp_rates_len +
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elems->ext_supp_rates_len; i++) {
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u8 rate = 0;
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int own_rate;
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if (i < elems->supp_rates_len)
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rate = elems->supp_rates[i];
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else if (elems->ext_supp_rates)
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rate = elems->ext_supp_rates
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[i - elems->supp_rates_len];
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own_rate = 5 * (rate & 0x7f);
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for (j = 0; j < num_rates; j++)
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if (bitrates[j].bitrate == own_rate)
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supp_rates |= BIT(j);
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}
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return supp_rates;
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}
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/* frame sending functions */
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/* also used by scanning code */
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void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
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u8 *ssid, size_t ssid_len)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_supported_band *sband;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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u8 *pos, *supp_rates, *esupp_rates = NULL;
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int i;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
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"request\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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memset(mgmt, 0, 24);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_PROBE_REQ);
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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if (dst) {
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memcpy(mgmt->da, dst, ETH_ALEN);
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memcpy(mgmt->bssid, dst, ETH_ALEN);
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} else {
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memset(mgmt->da, 0xff, ETH_ALEN);
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memset(mgmt->bssid, 0xff, ETH_ALEN);
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}
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pos = skb_put(skb, 2 + ssid_len);
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*pos++ = WLAN_EID_SSID;
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*pos++ = ssid_len;
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memcpy(pos, ssid, ssid_len);
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supp_rates = skb_put(skb, 2);
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supp_rates[0] = WLAN_EID_SUPP_RATES;
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supp_rates[1] = 0;
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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for (i = 0; i < sband->n_bitrates; i++) {
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struct ieee80211_rate *rate = &sband->bitrates[i];
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if (esupp_rates) {
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pos = skb_put(skb, 1);
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esupp_rates[1]++;
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} else if (supp_rates[1] == 8) {
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esupp_rates = skb_put(skb, 3);
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esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
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esupp_rates[1] = 1;
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pos = &esupp_rates[2];
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} else {
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pos = skb_put(skb, 1);
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supp_rates[1]++;
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}
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*pos = rate->bitrate / 5;
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}
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ieee80211_tx_skb(sdata, skb, 0);
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}
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static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_if_sta *ifsta,
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int transaction, u8 *extra, size_t extra_len,
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int encrypt)
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{
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struct ieee80211_local *local = sdata->local;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom +
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sizeof(*mgmt) + 6 + extra_len);
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
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"frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
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memset(mgmt, 0, 24 + 6);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_AUTH);
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if (encrypt)
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mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
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memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
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mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
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mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
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ifsta->auth_transaction = transaction + 1;
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mgmt->u.auth.status_code = cpu_to_le16(0);
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if (extra)
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memcpy(skb_put(skb, extra_len), extra, extra_len);
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ieee80211_tx_skb(sdata, skb, encrypt);
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}
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static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_if_sta *ifsta)
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{
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struct ieee80211_local *local = sdata->local;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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u8 *pos, *ies, *ht_ie;
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int i, len, count, rates_len, supp_rates_len;
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u16 capab;
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struct ieee80211_bss *bss;
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int wmm = 0;
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struct ieee80211_supported_band *sband;
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u64 rates = 0;
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skb = dev_alloc_skb(local->hw.extra_tx_headroom +
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sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
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ifsta->ssid_len);
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
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"frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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capab = ifsta->capab;
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if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
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}
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bss = ieee80211_rx_bss_get(local, ifsta->bssid,
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local->hw.conf.channel->center_freq,
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ifsta->ssid, ifsta->ssid_len);
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if (bss) {
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if (bss->capability & WLAN_CAPABILITY_PRIVACY)
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capab |= WLAN_CAPABILITY_PRIVACY;
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if (bss->wmm_used)
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wmm = 1;
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/* get all rates supported by the device and the AP as
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* some APs don't like getting a superset of their rates
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* in the association request (e.g. D-Link DAP 1353 in
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* b-only mode) */
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rates_len = ieee80211_compatible_rates(bss, sband, &rates);
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if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
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(local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
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capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
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ieee80211_rx_bss_put(local, bss);
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} else {
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rates = ~0;
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rates_len = sband->n_bitrates;
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}
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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memset(mgmt, 0, 24);
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memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
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if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
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skb_put(skb, 10);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_REASSOC_REQ);
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mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
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mgmt->u.reassoc_req.listen_interval =
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cpu_to_le16(local->hw.conf.listen_interval);
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memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
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ETH_ALEN);
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} else {
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skb_put(skb, 4);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_ASSOC_REQ);
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mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
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mgmt->u.assoc_req.listen_interval =
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cpu_to_le16(local->hw.conf.listen_interval);
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}
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/* SSID */
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ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
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*pos++ = WLAN_EID_SSID;
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*pos++ = ifsta->ssid_len;
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memcpy(pos, ifsta->ssid, ifsta->ssid_len);
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/* add all rates which were marked to be used above */
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supp_rates_len = rates_len;
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if (supp_rates_len > 8)
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supp_rates_len = 8;
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len = sband->n_bitrates;
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pos = skb_put(skb, supp_rates_len + 2);
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*pos++ = WLAN_EID_SUPP_RATES;
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*pos++ = supp_rates_len;
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count = 0;
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for (i = 0; i < sband->n_bitrates; i++) {
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if (BIT(i) & rates) {
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int rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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if (++count == 8)
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break;
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}
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}
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if (rates_len > count) {
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pos = skb_put(skb, rates_len - count + 2);
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*pos++ = WLAN_EID_EXT_SUPP_RATES;
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*pos++ = rates_len - count;
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for (i++; i < sband->n_bitrates; i++) {
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if (BIT(i) & rates) {
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int rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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}
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}
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}
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if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
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/* 1. power capabilities */
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pos = skb_put(skb, 4);
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*pos++ = WLAN_EID_PWR_CAPABILITY;
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*pos++ = 2;
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*pos++ = 0; /* min tx power */
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*pos++ = local->hw.conf.channel->max_power; /* max tx power */
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/* 2. supported channels */
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/* TODO: get this in reg domain format */
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pos = skb_put(skb, 2 * sband->n_channels + 2);
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*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
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*pos++ = 2 * sband->n_channels;
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for (i = 0; i < sband->n_channels; i++) {
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*pos++ = ieee80211_frequency_to_channel(
|
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sband->channels[i].center_freq);
|
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*pos++ = 1; /* one channel in the subband*/
|
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}
|
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}
|
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|
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if (ifsta->extra_ie) {
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pos = skb_put(skb, ifsta->extra_ie_len);
|
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memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
|
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}
|
||
|
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if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
|
||
pos = skb_put(skb, 9);
|
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*pos++ = WLAN_EID_VENDOR_SPECIFIC;
|
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*pos++ = 7; /* len */
|
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*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
|
||
*pos++ = 0x50;
|
||
*pos++ = 0xf2;
|
||
*pos++ = 2; /* WME */
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||
*pos++ = 0; /* WME info */
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||
*pos++ = 1; /* WME ver */
|
||
*pos++ = 0;
|
||
}
|
||
|
||
/* wmm support is a must to HT */
|
||
if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
|
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sband->ht_cap.ht_supported &&
|
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(ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
|
||
ht_ie[1] >= sizeof(struct ieee80211_ht_info)) {
|
||
struct ieee80211_ht_info *ht_info =
|
||
(struct ieee80211_ht_info *)(ht_ie + 2);
|
||
u16 cap = sband->ht_cap.cap;
|
||
__le16 tmp;
|
||
u32 flags = local->hw.conf.channel->flags;
|
||
|
||
switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
|
||
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
|
||
if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
|
||
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
|
||
cap &= ~IEEE80211_HT_CAP_SGI_40;
|
||
}
|
||
break;
|
||
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
|
||
if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
|
||
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
|
||
cap &= ~IEEE80211_HT_CAP_SGI_40;
|
||
}
|
||
break;
|
||
}
|
||
|
||
tmp = cpu_to_le16(cap);
|
||
pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
|
||
*pos++ = WLAN_EID_HT_CAPABILITY;
|
||
*pos++ = sizeof(struct ieee80211_ht_cap);
|
||
memset(pos, 0, sizeof(struct ieee80211_ht_cap));
|
||
memcpy(pos, &tmp, sizeof(u16));
|
||
pos += sizeof(u16);
|
||
/* TODO: needs a define here for << 2 */
|
||
*pos++ = sband->ht_cap.ampdu_factor |
|
||
(sband->ht_cap.ampdu_density << 2);
|
||
memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
|
||
}
|
||
|
||
kfree(ifsta->assocreq_ies);
|
||
ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
|
||
ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
|
||
if (ifsta->assocreq_ies)
|
||
memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
|
||
|
||
ieee80211_tx_skb(sdata, skb, 0);
|
||
}
|
||
|
||
|
||
static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
|
||
u16 stype, u16 reason)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for "
|
||
"deauth/disassoc frame\n", sdata->dev->name);
|
||
return;
|
||
}
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||
memset(mgmt, 0, 24);
|
||
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
|
||
memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
|
||
skb_put(skb, 2);
|
||
/* u.deauth.reason_code == u.disassoc.reason_code */
|
||
mgmt->u.deauth.reason_code = cpu_to_le16(reason);
|
||
|
||
ieee80211_tx_skb(sdata, skb, 0);
|
||
}
|
||
|
||
/* MLME */
|
||
static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_bss *bss)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
int i, have_higher_than_11mbit = 0;
|
||
|
||
/* cf. IEEE 802.11 9.2.12 */
|
||
for (i = 0; i < bss->supp_rates_len; i++)
|
||
if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
|
||
have_higher_than_11mbit = 1;
|
||
|
||
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
|
||
have_higher_than_11mbit)
|
||
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
|
||
else
|
||
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
|
||
|
||
ieee80211_set_wmm_default(sdata);
|
||
}
|
||
|
||
static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
|
||
struct ieee80211_if_sta *ifsta,
|
||
u8 *wmm_param, size_t wmm_param_len)
|
||
{
|
||
struct ieee80211_tx_queue_params params;
|
||
size_t left;
|
||
int count;
|
||
u8 *pos;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
|
||
return;
|
||
|
||
if (!wmm_param)
|
||
return;
|
||
|
||
if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
|
||
return;
|
||
count = wmm_param[6] & 0x0f;
|
||
if (count == ifsta->wmm_last_param_set)
|
||
return;
|
||
ifsta->wmm_last_param_set = count;
|
||
|
||
pos = wmm_param + 8;
|
||
left = wmm_param_len - 8;
|
||
|
||
memset(¶ms, 0, sizeof(params));
|
||
|
||
if (!local->ops->conf_tx)
|
||
return;
|
||
|
||
local->wmm_acm = 0;
|
||
for (; left >= 4; left -= 4, pos += 4) {
|
||
int aci = (pos[0] >> 5) & 0x03;
|
||
int acm = (pos[0] >> 4) & 0x01;
|
||
int queue;
|
||
|
||
switch (aci) {
|
||
case 1:
|
||
queue = 3;
|
||
if (acm)
|
||
local->wmm_acm |= BIT(0) | BIT(3);
|
||
break;
|
||
case 2:
|
||
queue = 1;
|
||
if (acm)
|
||
local->wmm_acm |= BIT(4) | BIT(5);
|
||
break;
|
||
case 3:
|
||
queue = 0;
|
||
if (acm)
|
||
local->wmm_acm |= BIT(6) | BIT(7);
|
||
break;
|
||
case 0:
|
||
default:
|
||
queue = 2;
|
||
if (acm)
|
||
local->wmm_acm |= BIT(1) | BIT(2);
|
||
break;
|
||
}
|
||
|
||
params.aifs = pos[0] & 0x0f;
|
||
params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
|
||
params.cw_min = ecw2cw(pos[1] & 0x0f);
|
||
params.txop = get_unaligned_le16(pos + 2);
|
||
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
||
printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
|
||
"cWmin=%d cWmax=%d txop=%d\n",
|
||
local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
|
||
params.cw_max, params.txop);
|
||
#endif
|
||
/* TODO: handle ACM (block TX, fallback to next lowest allowed
|
||
* AC for now) */
|
||
if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
|
||
printk(KERN_DEBUG "%s: failed to set TX queue "
|
||
"parameters for queue %d\n", local->mdev->name, queue);
|
||
}
|
||
}
|
||
}
|
||
|
||
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
|
||
u16 capab, bool erp_valid, u8 erp)
|
||
{
|
||
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
||
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
#endif
|
||
u32 changed = 0;
|
||
bool use_protection;
|
||
bool use_short_preamble;
|
||
bool use_short_slot;
|
||
|
||
if (erp_valid) {
|
||
use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
|
||
use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
|
||
} else {
|
||
use_protection = false;
|
||
use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
|
||
}
|
||
|
||
use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
|
||
|
||
if (use_protection != bss_conf->use_cts_prot) {
|
||
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
|
||
sdata->dev->name,
|
||
use_protection ? "enabled" : "disabled",
|
||
ifsta->bssid);
|
||
}
|
||
#endif
|
||
bss_conf->use_cts_prot = use_protection;
|
||
changed |= BSS_CHANGED_ERP_CTS_PROT;
|
||
}
|
||
|
||
if (use_short_preamble != bss_conf->use_short_preamble) {
|
||
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: switched to %s barker preamble"
|
||
" (BSSID=%pM)\n",
|
||
sdata->dev->name,
|
||
use_short_preamble ? "short" : "long",
|
||
ifsta->bssid);
|
||
}
|
||
#endif
|
||
bss_conf->use_short_preamble = use_short_preamble;
|
||
changed |= BSS_CHANGED_ERP_PREAMBLE;
|
||
}
|
||
|
||
if (use_short_slot != bss_conf->use_short_slot) {
|
||
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: switched to %s slot time"
|
||
" (BSSID=%pM)\n",
|
||
sdata->dev->name,
|
||
use_short_slot ? "short" : "long",
|
||
ifsta->bssid);
|
||
}
|
||
#endif
|
||
bss_conf->use_short_slot = use_short_slot;
|
||
changed |= BSS_CHANGED_ERP_SLOT;
|
||
}
|
||
|
||
return changed;
|
||
}
|
||
|
||
static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
union iwreq_data wrqu;
|
||
memset(&wrqu, 0, sizeof(wrqu));
|
||
if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
|
||
memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
|
||
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
|
||
wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
|
||
}
|
||
|
||
static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
char *buf;
|
||
size_t len;
|
||
int i;
|
||
union iwreq_data wrqu;
|
||
|
||
if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
|
||
return;
|
||
|
||
buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
|
||
ifsta->assocresp_ies_len), GFP_KERNEL);
|
||
if (!buf)
|
||
return;
|
||
|
||
len = sprintf(buf, "ASSOCINFO(");
|
||
if (ifsta->assocreq_ies) {
|
||
len += sprintf(buf + len, "ReqIEs=");
|
||
for (i = 0; i < ifsta->assocreq_ies_len; i++) {
|
||
len += sprintf(buf + len, "%02x",
|
||
ifsta->assocreq_ies[i]);
|
||
}
|
||
}
|
||
if (ifsta->assocresp_ies) {
|
||
if (ifsta->assocreq_ies)
|
||
len += sprintf(buf + len, " ");
|
||
len += sprintf(buf + len, "RespIEs=");
|
||
for (i = 0; i < ifsta->assocresp_ies_len; i++) {
|
||
len += sprintf(buf + len, "%02x",
|
||
ifsta->assocresp_ies[i]);
|
||
}
|
||
}
|
||
len += sprintf(buf + len, ")");
|
||
|
||
if (len > IW_CUSTOM_MAX) {
|
||
len = sprintf(buf, "ASSOCRESPIE=");
|
||
for (i = 0; i < ifsta->assocresp_ies_len; i++) {
|
||
len += sprintf(buf + len, "%02x",
|
||
ifsta->assocresp_ies[i]);
|
||
}
|
||
}
|
||
|
||
if (len <= IW_CUSTOM_MAX) {
|
||
memset(&wrqu, 0, sizeof(wrqu));
|
||
wrqu.data.length = len;
|
||
wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
|
||
}
|
||
|
||
kfree(buf);
|
||
}
|
||
|
||
|
||
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
u32 bss_info_changed)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_conf *conf = &local_to_hw(local)->conf;
|
||
|
||
struct ieee80211_bss *bss;
|
||
|
||
bss_info_changed |= BSS_CHANGED_ASSOC;
|
||
ifsta->flags |= IEEE80211_STA_ASSOCIATED;
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
||
return;
|
||
|
||
bss = ieee80211_rx_bss_get(local, ifsta->bssid,
|
||
conf->channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (bss) {
|
||
/* set timing information */
|
||
sdata->vif.bss_conf.beacon_int = bss->beacon_int;
|
||
sdata->vif.bss_conf.timestamp = bss->timestamp;
|
||
sdata->vif.bss_conf.dtim_period = bss->dtim_period;
|
||
|
||
bss_info_changed |= ieee80211_handle_bss_capability(sdata,
|
||
bss->capability, bss->has_erp_value, bss->erp_value);
|
||
|
||
ieee80211_rx_bss_put(local, bss);
|
||
}
|
||
|
||
ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
|
||
memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
|
||
ieee80211_sta_send_associnfo(sdata, ifsta);
|
||
|
||
ifsta->last_probe = jiffies;
|
||
ieee80211_led_assoc(local, 1);
|
||
|
||
sdata->vif.bss_conf.assoc = 1;
|
||
/*
|
||
* For now just always ask the driver to update the basic rateset
|
||
* when we have associated, we aren't checking whether it actually
|
||
* changed or not.
|
||
*/
|
||
bss_info_changed |= BSS_CHANGED_BASIC_RATES;
|
||
ieee80211_bss_info_change_notify(sdata, bss_info_changed);
|
||
|
||
if (local->powersave) {
|
||
if (local->dynamic_ps_timeout > 0)
|
||
mod_timer(&local->dynamic_ps_timer, jiffies +
|
||
msecs_to_jiffies(local->dynamic_ps_timeout));
|
||
else {
|
||
conf->flags |= IEEE80211_CONF_PS;
|
||
ieee80211_hw_config(local,
|
||
IEEE80211_CONF_CHANGE_PS);
|
||
}
|
||
}
|
||
|
||
netif_tx_start_all_queues(sdata->dev);
|
||
netif_carrier_on(sdata->dev);
|
||
|
||
ieee80211_sta_send_apinfo(sdata, ifsta);
|
||
}
|
||
|
||
static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
ifsta->direct_probe_tries++;
|
||
if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
|
||
printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
|
||
sdata->dev->name, ifsta->bssid);
|
||
ifsta->state = IEEE80211_STA_MLME_DISABLED;
|
||
ieee80211_sta_send_apinfo(sdata, ifsta);
|
||
return;
|
||
}
|
||
|
||
printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
|
||
sdata->dev->name, ifsta->bssid,
|
||
ifsta->direct_probe_tries);
|
||
|
||
ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
|
||
|
||
set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
|
||
|
||
/* Direct probe is sent to broadcast address as some APs
|
||
* will not answer to direct packet in unassociated state.
|
||
*/
|
||
ieee80211_send_probe_req(sdata, NULL,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
|
||
}
|
||
|
||
|
||
static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
ifsta->auth_tries++;
|
||
if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
|
||
printk(KERN_DEBUG "%s: authentication with AP %pM"
|
||
" timed out\n",
|
||
sdata->dev->name, ifsta->bssid);
|
||
ifsta->state = IEEE80211_STA_MLME_DISABLED;
|
||
ieee80211_sta_send_apinfo(sdata, ifsta);
|
||
return;
|
||
}
|
||
|
||
ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
|
||
printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
|
||
sdata->dev->name, ifsta->bssid);
|
||
|
||
ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
|
||
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
|
||
}
|
||
|
||
/*
|
||
* The disassoc 'reason' argument can be either our own reason
|
||
* if self disconnected or a reason code from the AP.
|
||
*/
|
||
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta, bool deauth,
|
||
bool self_disconnected, u16 reason)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct sta_info *sta;
|
||
u32 changed = 0, config_changed = 0;
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, ifsta->bssid);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
if (deauth) {
|
||
ifsta->direct_probe_tries = 0;
|
||
ifsta->auth_tries = 0;
|
||
}
|
||
ifsta->assoc_scan_tries = 0;
|
||
ifsta->assoc_tries = 0;
|
||
|
||
netif_tx_stop_all_queues(sdata->dev);
|
||
netif_carrier_off(sdata->dev);
|
||
|
||
ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
|
||
|
||
if (self_disconnected) {
|
||
if (deauth)
|
||
ieee80211_send_deauth_disassoc(sdata,
|
||
IEEE80211_STYPE_DEAUTH, reason);
|
||
else
|
||
ieee80211_send_deauth_disassoc(sdata,
|
||
IEEE80211_STYPE_DISASSOC, reason);
|
||
}
|
||
|
||
ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
|
||
changed |= ieee80211_reset_erp_info(sdata);
|
||
|
||
ieee80211_led_assoc(local, 0);
|
||
changed |= BSS_CHANGED_ASSOC;
|
||
sdata->vif.bss_conf.assoc = false;
|
||
|
||
ieee80211_sta_send_apinfo(sdata, ifsta);
|
||
|
||
if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
|
||
ifsta->state = IEEE80211_STA_MLME_DISABLED;
|
||
|
||
rcu_read_unlock();
|
||
|
||
local->hw.conf.ht.enabled = false;
|
||
local->oper_channel_type = NL80211_CHAN_NO_HT;
|
||
config_changed |= IEEE80211_CONF_CHANGE_HT;
|
||
|
||
del_timer_sync(&local->dynamic_ps_timer);
|
||
cancel_work_sync(&local->dynamic_ps_enable_work);
|
||
|
||
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
||
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
||
config_changed |= IEEE80211_CONF_CHANGE_PS;
|
||
}
|
||
|
||
ieee80211_hw_config(local, config_changed);
|
||
ieee80211_bss_info_change_notify(sdata, changed);
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, ifsta->bssid);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
sta_info_unlink(&sta);
|
||
|
||
rcu_read_unlock();
|
||
|
||
sta_info_destroy(sta);
|
||
}
|
||
|
||
static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
|
||
{
|
||
if (!sdata || !sdata->default_key ||
|
||
sdata->default_key->conf.alg != ALG_WEP)
|
||
return 0;
|
||
return 1;
|
||
}
|
||
|
||
static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_bss *bss;
|
||
int bss_privacy;
|
||
int wep_privacy;
|
||
int privacy_invoked;
|
||
|
||
if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
|
||
return 0;
|
||
|
||
bss = ieee80211_rx_bss_get(local, ifsta->bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (!bss)
|
||
return 0;
|
||
|
||
bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
|
||
wep_privacy = !!ieee80211_sta_wep_configured(sdata);
|
||
privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
|
||
|
||
ieee80211_rx_bss_put(local, bss);
|
||
|
||
if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
ifsta->assoc_tries++;
|
||
if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
|
||
printk(KERN_DEBUG "%s: association with AP %pM"
|
||
" timed out\n",
|
||
sdata->dev->name, ifsta->bssid);
|
||
ifsta->state = IEEE80211_STA_MLME_DISABLED;
|
||
ieee80211_sta_send_apinfo(sdata, ifsta);
|
||
return;
|
||
}
|
||
|
||
ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
|
||
printk(KERN_DEBUG "%s: associate with AP %pM\n",
|
||
sdata->dev->name, ifsta->bssid);
|
||
if (ieee80211_privacy_mismatch(sdata, ifsta)) {
|
||
printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
|
||
"mixed-cell disabled - abort association\n", sdata->dev->name);
|
||
ifsta->state = IEEE80211_STA_MLME_DISABLED;
|
||
return;
|
||
}
|
||
|
||
ieee80211_send_assoc(sdata, ifsta);
|
||
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
|
||
}
|
||
|
||
|
||
static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct sta_info *sta;
|
||
int disassoc;
|
||
|
||
/* TODO: start monitoring current AP signal quality and number of
|
||
* missed beacons. Scan other channels every now and then and search
|
||
* for better APs. */
|
||
/* TODO: remove expired BSSes */
|
||
|
||
ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, ifsta->bssid);
|
||
if (!sta) {
|
||
printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
|
||
sdata->dev->name, ifsta->bssid);
|
||
disassoc = 1;
|
||
} else {
|
||
disassoc = 0;
|
||
if (time_after(jiffies,
|
||
sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
|
||
if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
|
||
printk(KERN_DEBUG "%s: No ProbeResp from "
|
||
"current AP %pM - assume out of "
|
||
"range\n",
|
||
sdata->dev->name, ifsta->bssid);
|
||
disassoc = 1;
|
||
} else
|
||
ieee80211_send_probe_req(sdata, ifsta->bssid,
|
||
ifsta->ssid,
|
||
ifsta->ssid_len);
|
||
ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
|
||
} else {
|
||
ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
|
||
if (time_after(jiffies, ifsta->last_probe +
|
||
IEEE80211_PROBE_INTERVAL)) {
|
||
ifsta->last_probe = jiffies;
|
||
ieee80211_send_probe_req(sdata, ifsta->bssid,
|
||
ifsta->ssid,
|
||
ifsta->ssid_len);
|
||
}
|
||
}
|
||
}
|
||
|
||
rcu_read_unlock();
|
||
|
||
if (disassoc)
|
||
ieee80211_set_disassoc(sdata, ifsta, true, true,
|
||
WLAN_REASON_PREV_AUTH_NOT_VALID);
|
||
else
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_MONITORING_INTERVAL);
|
||
}
|
||
|
||
|
||
static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
|
||
ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
|
||
ieee80211_associate(sdata, ifsta);
|
||
}
|
||
|
||
|
||
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
u8 *pos;
|
||
struct ieee802_11_elems elems;
|
||
|
||
pos = mgmt->u.auth.variable;
|
||
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
||
if (!elems.challenge)
|
||
return;
|
||
ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
|
||
elems.challenge_len + 2, 1);
|
||
}
|
||
|
||
static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
u16 auth_alg, auth_transaction, status_code;
|
||
|
||
if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
|
||
sdata->vif.type != NL80211_IFTYPE_ADHOC)
|
||
return;
|
||
|
||
if (len < 24 + 6)
|
||
return;
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
|
||
memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
|
||
return;
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
|
||
memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
|
||
return;
|
||
|
||
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
|
||
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
|
||
status_code = le16_to_cpu(mgmt->u.auth.status_code);
|
||
|
||
if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
|
||
/*
|
||
* IEEE 802.11 standard does not require authentication in IBSS
|
||
* networks and most implementations do not seem to use it.
|
||
* However, try to reply to authentication attempts if someone
|
||
* has actually implemented this.
|
||
*/
|
||
if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
|
||
return;
|
||
ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
|
||
}
|
||
|
||
if (auth_alg != ifsta->auth_alg ||
|
||
auth_transaction != ifsta->auth_transaction)
|
||
return;
|
||
|
||
if (status_code != WLAN_STATUS_SUCCESS) {
|
||
if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
|
||
u8 algs[3];
|
||
const int num_algs = ARRAY_SIZE(algs);
|
||
int i, pos;
|
||
algs[0] = algs[1] = algs[2] = 0xff;
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
|
||
algs[0] = WLAN_AUTH_OPEN;
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
|
||
algs[1] = WLAN_AUTH_SHARED_KEY;
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
|
||
algs[2] = WLAN_AUTH_LEAP;
|
||
if (ifsta->auth_alg == WLAN_AUTH_OPEN)
|
||
pos = 0;
|
||
else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
|
||
pos = 1;
|
||
else
|
||
pos = 2;
|
||
for (i = 0; i < num_algs; i++) {
|
||
pos++;
|
||
if (pos >= num_algs)
|
||
pos = 0;
|
||
if (algs[pos] == ifsta->auth_alg ||
|
||
algs[pos] == 0xff)
|
||
continue;
|
||
if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
|
||
!ieee80211_sta_wep_configured(sdata))
|
||
continue;
|
||
ifsta->auth_alg = algs[pos];
|
||
break;
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
|
||
switch (ifsta->auth_alg) {
|
||
case WLAN_AUTH_OPEN:
|
||
case WLAN_AUTH_LEAP:
|
||
ieee80211_auth_completed(sdata, ifsta);
|
||
break;
|
||
case WLAN_AUTH_SHARED_KEY:
|
||
if (ifsta->auth_transaction == 4)
|
||
ieee80211_auth_completed(sdata, ifsta);
|
||
else
|
||
ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
u16 reason_code;
|
||
|
||
if (len < 24 + 2)
|
||
return;
|
||
|
||
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
|
||
return;
|
||
|
||
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
|
||
|
||
if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
|
||
printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
|
||
sdata->dev->name, reason_code);
|
||
|
||
if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
|
||
ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
|
||
ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
|
||
ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_RETRY_AUTH_INTERVAL);
|
||
}
|
||
|
||
ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
|
||
ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len)
|
||
{
|
||
u16 reason_code;
|
||
|
||
if (len < 24 + 2)
|
||
return;
|
||
|
||
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
|
||
return;
|
||
|
||
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
|
||
|
||
if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
|
||
printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
|
||
sdata->dev->name, reason_code);
|
||
|
||
if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
|
||
ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_RETRY_AUTH_INTERVAL);
|
||
}
|
||
|
||
ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
int reassoc)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_supported_band *sband;
|
||
struct sta_info *sta;
|
||
u64 rates, basic_rates;
|
||
u16 capab_info, status_code, aid;
|
||
struct ieee802_11_elems elems;
|
||
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
|
||
u8 *pos;
|
||
u32 changed = 0;
|
||
int i, j;
|
||
bool have_higher_than_11mbit = false, newsta = false;
|
||
u16 ap_ht_cap_flags;
|
||
|
||
/* AssocResp and ReassocResp have identical structure, so process both
|
||
* of them in this function. */
|
||
|
||
if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
|
||
return;
|
||
|
||
if (len < 24 + 6)
|
||
return;
|
||
|
||
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
|
||
return;
|
||
|
||
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
|
||
status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
|
||
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
|
||
|
||
printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
|
||
"status=%d aid=%d)\n",
|
||
sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
|
||
capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
|
||
|
||
if (status_code != WLAN_STATUS_SUCCESS) {
|
||
printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
|
||
sdata->dev->name, status_code);
|
||
/* if this was a reassociation, ensure we try a "full"
|
||
* association next time. This works around some broken APs
|
||
* which do not correctly reject reassociation requests. */
|
||
ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
|
||
return;
|
||
}
|
||
|
||
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
|
||
printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
|
||
"set\n", sdata->dev->name, aid);
|
||
aid &= ~(BIT(15) | BIT(14));
|
||
|
||
pos = mgmt->u.assoc_resp.variable;
|
||
ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
|
||
|
||
if (!elems.supp_rates) {
|
||
printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
|
||
sdata->dev->name);
|
||
return;
|
||
}
|
||
|
||
printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
|
||
ifsta->aid = aid;
|
||
ifsta->ap_capab = capab_info;
|
||
|
||
kfree(ifsta->assocresp_ies);
|
||
ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
|
||
ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
|
||
if (ifsta->assocresp_ies)
|
||
memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
|
||
|
||
rcu_read_lock();
|
||
|
||
/* Add STA entry for the AP */
|
||
sta = sta_info_get(local, ifsta->bssid);
|
||
if (!sta) {
|
||
struct ieee80211_bss *bss;
|
||
|
||
newsta = true;
|
||
|
||
sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
|
||
if (!sta) {
|
||
printk(KERN_DEBUG "%s: failed to alloc STA entry for"
|
||
" the AP\n", sdata->dev->name);
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
bss = ieee80211_rx_bss_get(local, ifsta->bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (bss) {
|
||
sta->last_signal = bss->signal;
|
||
sta->last_qual = bss->qual;
|
||
sta->last_noise = bss->noise;
|
||
ieee80211_rx_bss_put(local, bss);
|
||
}
|
||
|
||
/* update new sta with its last rx activity */
|
||
sta->last_rx = jiffies;
|
||
}
|
||
|
||
/*
|
||
* FIXME: Do we really need to update the sta_info's information here?
|
||
* We already know about the AP (we found it in our list) so it
|
||
* should already be filled with the right info, no?
|
||
* As is stands, all this is racy because typically we assume
|
||
* the information that is filled in here (except flags) doesn't
|
||
* change while a STA structure is alive. As such, it should move
|
||
* to between the sta_info_alloc() and sta_info_insert() above.
|
||
*/
|
||
|
||
set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
|
||
WLAN_STA_AUTHORIZED);
|
||
|
||
rates = 0;
|
||
basic_rates = 0;
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
|
||
for (i = 0; i < elems.supp_rates_len; i++) {
|
||
int rate = (elems.supp_rates[i] & 0x7f) * 5;
|
||
bool is_basic = !!(elems.supp_rates[i] & 0x80);
|
||
|
||
if (rate > 110)
|
||
have_higher_than_11mbit = true;
|
||
|
||
for (j = 0; j < sband->n_bitrates; j++) {
|
||
if (sband->bitrates[j].bitrate == rate) {
|
||
rates |= BIT(j);
|
||
if (is_basic)
|
||
basic_rates |= BIT(j);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
for (i = 0; i < elems.ext_supp_rates_len; i++) {
|
||
int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
|
||
bool is_basic = !!(elems.supp_rates[i] & 0x80);
|
||
|
||
if (rate > 110)
|
||
have_higher_than_11mbit = true;
|
||
|
||
for (j = 0; j < sband->n_bitrates; j++) {
|
||
if (sband->bitrates[j].bitrate == rate) {
|
||
rates |= BIT(j);
|
||
if (is_basic)
|
||
basic_rates |= BIT(j);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
|
||
sdata->vif.bss_conf.basic_rates = basic_rates;
|
||
|
||
/* cf. IEEE 802.11 9.2.12 */
|
||
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
|
||
have_higher_than_11mbit)
|
||
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
|
||
else
|
||
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
|
||
|
||
if (elems.ht_cap_elem)
|
||
ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
|
||
elems.ht_cap_elem, &sta->sta.ht_cap);
|
||
|
||
ap_ht_cap_flags = sta->sta.ht_cap.cap;
|
||
|
||
rate_control_rate_init(sta);
|
||
|
||
if (elems.wmm_param)
|
||
set_sta_flags(sta, WLAN_STA_WME);
|
||
|
||
if (newsta) {
|
||
int err = sta_info_insert(sta);
|
||
if (err) {
|
||
printk(KERN_DEBUG "%s: failed to insert STA entry for"
|
||
" the AP (error %d)\n", sdata->dev->name, err);
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
}
|
||
|
||
rcu_read_unlock();
|
||
|
||
if (elems.wmm_param)
|
||
ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
|
||
elems.wmm_param_len);
|
||
|
||
if (elems.ht_info_elem && elems.wmm_param &&
|
||
(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
|
||
changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
|
||
ap_ht_cap_flags);
|
||
|
||
/* set AID and assoc capability,
|
||
* ieee80211_set_associated() will tell the driver */
|
||
bss_conf->aid = aid;
|
||
bss_conf->assoc_capability = capab_info;
|
||
ieee80211_set_associated(sdata, ifsta, changed);
|
||
|
||
ieee80211_associated(sdata, ifsta);
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_bss *bss)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
int res, rates, i, j;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u8 *pos;
|
||
struct ieee80211_supported_band *sband;
|
||
union iwreq_data wrqu;
|
||
|
||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
|
||
if (!skb) {
|
||
printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
|
||
"response\n", sdata->dev->name);
|
||
return -ENOMEM;
|
||
}
|
||
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
|
||
/* Remove possible STA entries from other IBSS networks. */
|
||
sta_info_flush_delayed(sdata);
|
||
|
||
if (local->ops->reset_tsf) {
|
||
/* Reset own TSF to allow time synchronization work. */
|
||
local->ops->reset_tsf(local_to_hw(local));
|
||
}
|
||
memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
|
||
res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
|
||
if (res)
|
||
return res;
|
||
|
||
local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
|
||
|
||
sdata->drop_unencrypted = bss->capability &
|
||
WLAN_CAPABILITY_PRIVACY ? 1 : 0;
|
||
|
||
res = ieee80211_set_freq(sdata, bss->freq);
|
||
|
||
if (res)
|
||
return res;
|
||
|
||
/* Build IBSS probe response */
|
||
|
||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||
|
||
mgmt = (struct ieee80211_mgmt *)
|
||
skb_put(skb, 24 + sizeof(mgmt->u.beacon));
|
||
memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
|
||
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
||
IEEE80211_STYPE_PROBE_RESP);
|
||
memset(mgmt->da, 0xff, ETH_ALEN);
|
||
memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
|
||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||
mgmt->u.beacon.beacon_int =
|
||
cpu_to_le16(local->hw.conf.beacon_int);
|
||
mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
|
||
mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
|
||
|
||
pos = skb_put(skb, 2 + ifsta->ssid_len);
|
||
*pos++ = WLAN_EID_SSID;
|
||
*pos++ = ifsta->ssid_len;
|
||
memcpy(pos, ifsta->ssid, ifsta->ssid_len);
|
||
|
||
rates = bss->supp_rates_len;
|
||
if (rates > 8)
|
||
rates = 8;
|
||
pos = skb_put(skb, 2 + rates);
|
||
*pos++ = WLAN_EID_SUPP_RATES;
|
||
*pos++ = rates;
|
||
memcpy(pos, bss->supp_rates, rates);
|
||
|
||
if (bss->band == IEEE80211_BAND_2GHZ) {
|
||
pos = skb_put(skb, 2 + 1);
|
||
*pos++ = WLAN_EID_DS_PARAMS;
|
||
*pos++ = 1;
|
||
*pos++ = ieee80211_frequency_to_channel(bss->freq);
|
||
}
|
||
|
||
pos = skb_put(skb, 2 + 2);
|
||
*pos++ = WLAN_EID_IBSS_PARAMS;
|
||
*pos++ = 2;
|
||
/* FIX: set ATIM window based on scan results */
|
||
*pos++ = 0;
|
||
*pos++ = 0;
|
||
|
||
if (bss->supp_rates_len > 8) {
|
||
rates = bss->supp_rates_len - 8;
|
||
pos = skb_put(skb, 2 + rates);
|
||
*pos++ = WLAN_EID_EXT_SUPP_RATES;
|
||
*pos++ = rates;
|
||
memcpy(pos, &bss->supp_rates[8], rates);
|
||
}
|
||
|
||
ifsta->probe_resp = skb;
|
||
|
||
ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
|
||
|
||
|
||
rates = 0;
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
for (i = 0; i < bss->supp_rates_len; i++) {
|
||
int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
|
||
for (j = 0; j < sband->n_bitrates; j++)
|
||
if (sband->bitrates[j].bitrate == bitrate)
|
||
rates |= BIT(j);
|
||
}
|
||
ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
|
||
|
||
ieee80211_sta_def_wmm_params(sdata, bss);
|
||
|
||
ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
|
||
|
||
ieee80211_led_assoc(local, true);
|
||
|
||
memset(&wrqu, 0, sizeof(wrqu));
|
||
memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
|
||
wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
|
||
|
||
return res;
|
||
}
|
||
|
||
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status,
|
||
struct ieee802_11_elems *elems,
|
||
bool beacon)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
int freq;
|
||
struct ieee80211_bss *bss;
|
||
struct sta_info *sta;
|
||
struct ieee80211_channel *channel;
|
||
u64 beacon_timestamp, rx_timestamp;
|
||
u64 supp_rates = 0;
|
||
enum ieee80211_band band = rx_status->band;
|
||
|
||
if (elems->ds_params && elems->ds_params_len == 1)
|
||
freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
|
||
else
|
||
freq = rx_status->freq;
|
||
|
||
channel = ieee80211_get_channel(local->hw.wiphy, freq);
|
||
|
||
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
|
||
return;
|
||
|
||
if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
|
||
memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
|
||
supp_rates = ieee80211_sta_get_rates(local, elems, band);
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, mgmt->sa);
|
||
if (sta) {
|
||
u64 prev_rates;
|
||
|
||
prev_rates = sta->sta.supp_rates[band];
|
||
/* make sure mandatory rates are always added */
|
||
sta->sta.supp_rates[band] = supp_rates |
|
||
ieee80211_mandatory_rates(local, band);
|
||
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
if (sta->sta.supp_rates[band] != prev_rates)
|
||
printk(KERN_DEBUG "%s: updated supp_rates set "
|
||
"for %pM based on beacon info (0x%llx | "
|
||
"0x%llx -> 0x%llx)\n",
|
||
sdata->dev->name,
|
||
sta->sta.addr,
|
||
(unsigned long long) prev_rates,
|
||
(unsigned long long) supp_rates,
|
||
(unsigned long long) sta->sta.supp_rates[band]);
|
||
#endif
|
||
} else {
|
||
ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
|
||
}
|
||
|
||
rcu_read_unlock();
|
||
}
|
||
|
||
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
|
||
freq, beacon);
|
||
if (!bss)
|
||
return;
|
||
|
||
/* was just updated in ieee80211_bss_info_update */
|
||
beacon_timestamp = bss->timestamp;
|
||
|
||
/*
|
||
* In STA mode, the remaining parameters should not be overridden
|
||
* by beacons because they're not necessarily accurate there.
|
||
*/
|
||
if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
|
||
bss->last_probe_resp && beacon) {
|
||
ieee80211_rx_bss_put(local, bss);
|
||
return;
|
||
}
|
||
|
||
/* check if we need to merge IBSS */
|
||
if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
|
||
bss->capability & WLAN_CAPABILITY_IBSS &&
|
||
bss->freq == local->oper_channel->center_freq &&
|
||
elems->ssid_len == sdata->u.sta.ssid_len &&
|
||
memcmp(elems->ssid, sdata->u.sta.ssid,
|
||
sdata->u.sta.ssid_len) == 0) {
|
||
if (rx_status->flag & RX_FLAG_TSFT) {
|
||
/* in order for correct IBSS merging we need mactime
|
||
*
|
||
* since mactime is defined as the time the first data
|
||
* symbol of the frame hits the PHY, and the timestamp
|
||
* of the beacon is defined as "the time that the data
|
||
* symbol containing the first bit of the timestamp is
|
||
* transmitted to the PHY plus the transmitting STA’s
|
||
* delays through its local PHY from the MAC-PHY
|
||
* interface to its interface with the WM"
|
||
* (802.11 11.1.2) - equals the time this bit arrives at
|
||
* the receiver - we have to take into account the
|
||
* offset between the two.
|
||
* e.g: at 1 MBit that means mactime is 192 usec earlier
|
||
* (=24 bytes * 8 usecs/byte) than the beacon timestamp.
|
||
*/
|
||
int rate;
|
||
if (rx_status->flag & RX_FLAG_HT) {
|
||
rate = 65; /* TODO: HT rates */
|
||
} else {
|
||
rate = local->hw.wiphy->bands[band]->
|
||
bitrates[rx_status->rate_idx].bitrate;
|
||
}
|
||
rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
|
||
} else if (local && local->ops && local->ops->get_tsf)
|
||
/* second best option: get current TSF */
|
||
rx_timestamp = local->ops->get_tsf(local_to_hw(local));
|
||
else
|
||
/* can't merge without knowing the TSF */
|
||
rx_timestamp = -1LLU;
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
|
||
"%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
|
||
mgmt->sa, mgmt->bssid,
|
||
(unsigned long long)rx_timestamp,
|
||
(unsigned long long)beacon_timestamp,
|
||
(unsigned long long)(rx_timestamp - beacon_timestamp),
|
||
jiffies);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
if (beacon_timestamp > rx_timestamp) {
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: beacon TSF higher than "
|
||
"local TSF - IBSS merge with BSSID %pM\n",
|
||
sdata->dev->name, mgmt->bssid);
|
||
#endif
|
||
ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
|
||
ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
|
||
}
|
||
}
|
||
|
||
ieee80211_rx_bss_put(local, bss);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
size_t baselen;
|
||
struct ieee802_11_elems elems;
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
|
||
if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
|
||
return; /* ignore ProbeResp to foreign address */
|
||
|
||
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
|
||
if (baselen > len)
|
||
return;
|
||
|
||
ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
|
||
&elems);
|
||
|
||
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
|
||
|
||
/* direct probe may be part of the association flow */
|
||
if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
|
||
&ifsta->request)) {
|
||
printk(KERN_DEBUG "%s direct probe responded\n",
|
||
sdata->dev->name);
|
||
ieee80211_authenticate(sdata, ifsta);
|
||
}
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_if_sta *ifsta;
|
||
size_t baselen;
|
||
struct ieee802_11_elems elems;
|
||
struct ieee80211_local *local = sdata->local;
|
||
u32 changed = 0;
|
||
bool erp_valid;
|
||
u8 erp_value = 0;
|
||
|
||
/* Process beacon from the current BSS */
|
||
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
|
||
if (baselen > len)
|
||
return;
|
||
|
||
ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
|
||
|
||
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
||
return;
|
||
ifsta = &sdata->u.sta;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
|
||
memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
|
||
return;
|
||
|
||
ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
|
||
elems.wmm_param_len);
|
||
|
||
|
||
if (elems.erp_info && elems.erp_info_len >= 1) {
|
||
erp_valid = true;
|
||
erp_value = elems.erp_info[0];
|
||
} else {
|
||
erp_valid = false;
|
||
}
|
||
changed |= ieee80211_handle_bss_capability(sdata,
|
||
le16_to_cpu(mgmt->u.beacon.capab_info),
|
||
erp_valid, erp_value);
|
||
|
||
|
||
if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
|
||
struct sta_info *sta;
|
||
struct ieee80211_supported_band *sband;
|
||
u16 ap_ht_cap_flags;
|
||
|
||
rcu_read_lock();
|
||
|
||
sta = sta_info_get(local, ifsta->bssid);
|
||
if (!sta) {
|
||
rcu_read_unlock();
|
||
return;
|
||
}
|
||
|
||
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
|
||
|
||
ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
|
||
elems.ht_cap_elem, &sta->sta.ht_cap);
|
||
|
||
ap_ht_cap_flags = sta->sta.ht_cap.cap;
|
||
|
||
rcu_read_unlock();
|
||
|
||
changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
|
||
ap_ht_cap_flags);
|
||
}
|
||
|
||
if (elems.country_elem) {
|
||
/* Note we are only reviewing this on beacons
|
||
* for the BSSID we are associated to */
|
||
regulatory_hint_11d(local->hw.wiphy,
|
||
elems.country_elem, elems.country_elem_len);
|
||
}
|
||
|
||
ieee80211_bss_info_change_notify(sdata, changed);
|
||
}
|
||
|
||
|
||
static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta,
|
||
struct ieee80211_mgmt *mgmt,
|
||
size_t len,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
int tx_last_beacon;
|
||
struct sk_buff *skb;
|
||
struct ieee80211_mgmt *resp;
|
||
u8 *pos, *end;
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
|
||
ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
|
||
len < 24 + 2 || !ifsta->probe_resp)
|
||
return;
|
||
|
||
if (local->ops->tx_last_beacon)
|
||
tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
|
||
else
|
||
tx_last_beacon = 1;
|
||
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
|
||
" (tx_last_beacon=%d)\n",
|
||
sdata->dev->name, mgmt->sa, mgmt->da,
|
||
mgmt->bssid, tx_last_beacon);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
|
||
if (!tx_last_beacon)
|
||
return;
|
||
|
||
if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
|
||
memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
|
||
return;
|
||
|
||
end = ((u8 *) mgmt) + len;
|
||
pos = mgmt->u.probe_req.variable;
|
||
if (pos[0] != WLAN_EID_SSID ||
|
||
pos + 2 + pos[1] > end) {
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
|
||
"from %pM\n",
|
||
sdata->dev->name, mgmt->sa);
|
||
#endif
|
||
return;
|
||
}
|
||
if (pos[1] != 0 &&
|
||
(pos[1] != ifsta->ssid_len ||
|
||
memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
|
||
/* Ignore ProbeReq for foreign SSID */
|
||
return;
|
||
}
|
||
|
||
/* Reply with ProbeResp */
|
||
skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
|
||
if (!skb)
|
||
return;
|
||
|
||
resp = (struct ieee80211_mgmt *) skb->data;
|
||
memcpy(resp->da, mgmt->sa, ETH_ALEN);
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
|
||
sdata->dev->name, resp->da);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
ieee80211_tx_skb(sdata, skb, 0);
|
||
}
|
||
|
||
void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
|
||
struct ieee80211_rx_status *rx_status)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_if_sta *ifsta;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 fc;
|
||
|
||
if (skb->len < 24)
|
||
goto fail;
|
||
|
||
ifsta = &sdata->u.sta;
|
||
|
||
mgmt = (struct ieee80211_mgmt *) skb->data;
|
||
fc = le16_to_cpu(mgmt->frame_control);
|
||
|
||
switch (fc & IEEE80211_FCTL_STYPE) {
|
||
case IEEE80211_STYPE_PROBE_REQ:
|
||
case IEEE80211_STYPE_PROBE_RESP:
|
||
case IEEE80211_STYPE_BEACON:
|
||
memcpy(skb->cb, rx_status, sizeof(*rx_status));
|
||
case IEEE80211_STYPE_AUTH:
|
||
case IEEE80211_STYPE_ASSOC_RESP:
|
||
case IEEE80211_STYPE_REASSOC_RESP:
|
||
case IEEE80211_STYPE_DEAUTH:
|
||
case IEEE80211_STYPE_DISASSOC:
|
||
skb_queue_tail(&ifsta->skb_queue, skb);
|
||
queue_work(local->hw.workqueue, &ifsta->work);
|
||
return;
|
||
}
|
||
|
||
fail:
|
||
kfree_skb(skb);
|
||
}
|
||
|
||
static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
|
||
struct sk_buff *skb)
|
||
{
|
||
struct ieee80211_rx_status *rx_status;
|
||
struct ieee80211_if_sta *ifsta;
|
||
struct ieee80211_mgmt *mgmt;
|
||
u16 fc;
|
||
|
||
ifsta = &sdata->u.sta;
|
||
|
||
rx_status = (struct ieee80211_rx_status *) skb->cb;
|
||
mgmt = (struct ieee80211_mgmt *) skb->data;
|
||
fc = le16_to_cpu(mgmt->frame_control);
|
||
|
||
switch (fc & IEEE80211_FCTL_STYPE) {
|
||
case IEEE80211_STYPE_PROBE_REQ:
|
||
ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
|
||
rx_status);
|
||
break;
|
||
case IEEE80211_STYPE_PROBE_RESP:
|
||
ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
|
||
break;
|
||
case IEEE80211_STYPE_BEACON:
|
||
ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
|
||
break;
|
||
case IEEE80211_STYPE_AUTH:
|
||
ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
|
||
break;
|
||
case IEEE80211_STYPE_ASSOC_RESP:
|
||
ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
|
||
break;
|
||
case IEEE80211_STYPE_REASSOC_RESP:
|
||
ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
|
||
break;
|
||
case IEEE80211_STYPE_DEAUTH:
|
||
ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
|
||
break;
|
||
case IEEE80211_STYPE_DISASSOC:
|
||
ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
|
||
break;
|
||
}
|
||
|
||
kfree_skb(skb);
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
int active = 0;
|
||
struct sta_info *sta;
|
||
|
||
rcu_read_lock();
|
||
|
||
list_for_each_entry_rcu(sta, &local->sta_list, list) {
|
||
if (sta->sdata == sdata &&
|
||
time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
|
||
jiffies)) {
|
||
active++;
|
||
break;
|
||
}
|
||
}
|
||
|
||
rcu_read_unlock();
|
||
|
||
return active;
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
|
||
|
||
ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
|
||
if (ieee80211_sta_active_ibss(sdata))
|
||
return;
|
||
|
||
printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
|
||
"IBSS networks with same SSID (merge)\n", sdata->dev->name);
|
||
ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_timer(unsigned long data)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata =
|
||
(struct ieee80211_sub_if_data *) data;
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
struct ieee80211_local *local = sdata->local;
|
||
|
||
set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
|
||
queue_work(local->hw.workqueue, &ifsta->work);
|
||
}
|
||
|
||
static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
|
||
if (local->ops->reset_tsf) {
|
||
/* Reset own TSF to allow time synchronization work. */
|
||
local->ops->reset_tsf(local_to_hw(local));
|
||
}
|
||
|
||
ifsta->wmm_last_param_set = -1; /* allow any WMM update */
|
||
|
||
|
||
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
|
||
ifsta->auth_alg = WLAN_AUTH_OPEN;
|
||
else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
|
||
ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
|
||
else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
|
||
ifsta->auth_alg = WLAN_AUTH_LEAP;
|
||
else
|
||
ifsta->auth_alg = WLAN_AUTH_OPEN;
|
||
ifsta->auth_transaction = -1;
|
||
ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
|
||
ifsta->assoc_scan_tries = 0;
|
||
ifsta->direct_probe_tries = 0;
|
||
ifsta->auth_tries = 0;
|
||
ifsta->assoc_tries = 0;
|
||
netif_tx_stop_all_queues(sdata->dev);
|
||
netif_carrier_off(sdata->dev);
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
|
||
const char *ssid, int ssid_len)
|
||
{
|
||
int tmp, hidden_ssid;
|
||
|
||
if (ssid_len == ifsta->ssid_len &&
|
||
!memcmp(ifsta->ssid, ssid, ssid_len))
|
||
return 1;
|
||
|
||
if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
|
||
return 0;
|
||
|
||
hidden_ssid = 1;
|
||
tmp = ssid_len;
|
||
while (tmp--) {
|
||
if (ssid[tmp] != '\0') {
|
||
hidden_ssid = 0;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
|
||
return 1;
|
||
|
||
if (ssid_len == 1 && ssid[0] == ' ')
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_bss *bss;
|
||
struct ieee80211_supported_band *sband;
|
||
u8 bssid[ETH_ALEN], *pos;
|
||
int i;
|
||
int ret;
|
||
|
||
#if 0
|
||
/* Easier testing, use fixed BSSID. */
|
||
memset(bssid, 0xfe, ETH_ALEN);
|
||
#else
|
||
/* Generate random, not broadcast, locally administered BSSID. Mix in
|
||
* own MAC address to make sure that devices that do not have proper
|
||
* random number generator get different BSSID. */
|
||
get_random_bytes(bssid, ETH_ALEN);
|
||
for (i = 0; i < ETH_ALEN; i++)
|
||
bssid[i] ^= sdata->dev->dev_addr[i];
|
||
bssid[0] &= ~0x01;
|
||
bssid[0] |= 0x02;
|
||
#endif
|
||
|
||
printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
|
||
sdata->dev->name, bssid);
|
||
|
||
bss = ieee80211_rx_bss_add(local, bssid,
|
||
local->hw.conf.channel->center_freq,
|
||
sdata->u.sta.ssid, sdata->u.sta.ssid_len);
|
||
if (!bss)
|
||
return -ENOMEM;
|
||
|
||
bss->band = local->hw.conf.channel->band;
|
||
sband = local->hw.wiphy->bands[bss->band];
|
||
|
||
if (local->hw.conf.beacon_int == 0)
|
||
local->hw.conf.beacon_int = 100;
|
||
bss->beacon_int = local->hw.conf.beacon_int;
|
||
bss->last_update = jiffies;
|
||
bss->capability = WLAN_CAPABILITY_IBSS;
|
||
|
||
if (sdata->default_key)
|
||
bss->capability |= WLAN_CAPABILITY_PRIVACY;
|
||
else
|
||
sdata->drop_unencrypted = 0;
|
||
|
||
bss->supp_rates_len = sband->n_bitrates;
|
||
pos = bss->supp_rates;
|
||
for (i = 0; i < sband->n_bitrates; i++) {
|
||
int rate = sband->bitrates[i].bitrate;
|
||
*pos++ = (u8) (rate / 5);
|
||
}
|
||
|
||
ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
|
||
ieee80211_rx_bss_put(local, bss);
|
||
return ret;
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_bss *bss;
|
||
int found = 0;
|
||
u8 bssid[ETH_ALEN];
|
||
int active_ibss;
|
||
|
||
if (ifsta->ssid_len == 0)
|
||
return -EINVAL;
|
||
|
||
active_ibss = ieee80211_sta_active_ibss(sdata);
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
|
||
sdata->dev->name, active_ibss);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
spin_lock_bh(&local->bss_lock);
|
||
list_for_each_entry(bss, &local->bss_list, list) {
|
||
if (ifsta->ssid_len != bss->ssid_len ||
|
||
memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
|
||
|| !(bss->capability & WLAN_CAPABILITY_IBSS))
|
||
continue;
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
memcpy(bssid, bss->bssid, ETH_ALEN);
|
||
found = 1;
|
||
if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
|
||
break;
|
||
}
|
||
spin_unlock_bh(&local->bss_lock);
|
||
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
if (found)
|
||
printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
|
||
"%pM\n", bssid, ifsta->bssid);
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
|
||
if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
|
||
int ret;
|
||
int search_freq;
|
||
|
||
if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
|
||
search_freq = bss->freq;
|
||
else
|
||
search_freq = local->hw.conf.channel->center_freq;
|
||
|
||
bss = ieee80211_rx_bss_get(local, bssid, search_freq,
|
||
ifsta->ssid, ifsta->ssid_len);
|
||
if (!bss)
|
||
goto dont_join;
|
||
|
||
printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
|
||
" based on configured SSID\n",
|
||
sdata->dev->name, bssid);
|
||
ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
|
||
ieee80211_rx_bss_put(local, bss);
|
||
return ret;
|
||
}
|
||
|
||
dont_join:
|
||
#ifdef CONFIG_MAC80211_IBSS_DEBUG
|
||
printk(KERN_DEBUG " did not try to join ibss\n");
|
||
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
|
||
|
||
/* Selected IBSS not found in current scan results - try to scan */
|
||
if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
|
||
!ieee80211_sta_active_ibss(sdata)) {
|
||
mod_timer(&ifsta->timer, jiffies +
|
||
IEEE80211_IBSS_MERGE_INTERVAL);
|
||
} else if (time_after(jiffies, local->last_scan_completed +
|
||
IEEE80211_SCAN_INTERVAL)) {
|
||
printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
|
||
"join\n", sdata->dev->name);
|
||
return ieee80211_request_scan(sdata, ifsta->ssid,
|
||
ifsta->ssid_len);
|
||
} else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
|
||
int interval = IEEE80211_SCAN_INTERVAL;
|
||
|
||
if (time_after(jiffies, ifsta->ibss_join_req +
|
||
IEEE80211_IBSS_JOIN_TIMEOUT)) {
|
||
if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
|
||
(!(local->oper_channel->flags &
|
||
IEEE80211_CHAN_NO_IBSS)))
|
||
return ieee80211_sta_create_ibss(sdata, ifsta);
|
||
if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
|
||
printk(KERN_DEBUG "%s: IBSS not allowed on"
|
||
" %d MHz\n", sdata->dev->name,
|
||
local->hw.conf.channel->center_freq);
|
||
}
|
||
|
||
/* No IBSS found - decrease scan interval and continue
|
||
* scanning. */
|
||
interval = IEEE80211_SCAN_INTERVAL_SLOW;
|
||
}
|
||
|
||
ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
|
||
mod_timer(&ifsta->timer, jiffies + interval);
|
||
return 0;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_bss *bss, *selected = NULL;
|
||
int top_rssi = 0, freq;
|
||
|
||
spin_lock_bh(&local->bss_lock);
|
||
freq = local->oper_channel->center_freq;
|
||
list_for_each_entry(bss, &local->bss_list, list) {
|
||
if (!(bss->capability & WLAN_CAPABILITY_ESS))
|
||
continue;
|
||
|
||
if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
|
||
IEEE80211_STA_AUTO_BSSID_SEL |
|
||
IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
|
||
(!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
|
||
!!sdata->default_key))
|
||
continue;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
|
||
bss->freq != freq)
|
||
continue;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
|
||
memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
|
||
continue;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
|
||
!ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
|
||
continue;
|
||
|
||
if (!selected || top_rssi < bss->signal) {
|
||
selected = bss;
|
||
top_rssi = bss->signal;
|
||
}
|
||
}
|
||
if (selected)
|
||
atomic_inc(&selected->users);
|
||
spin_unlock_bh(&local->bss_lock);
|
||
|
||
if (selected) {
|
||
ieee80211_set_freq(sdata, selected->freq);
|
||
if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
|
||
ieee80211_sta_set_ssid(sdata, selected->ssid,
|
||
selected->ssid_len);
|
||
ieee80211_sta_set_bssid(sdata, selected->bssid);
|
||
ieee80211_sta_def_wmm_params(sdata, selected);
|
||
|
||
/* Send out direct probe if no probe resp was received or
|
||
* the one we have is outdated
|
||
*/
|
||
if (!selected->last_probe_resp ||
|
||
time_after(jiffies, selected->last_probe_resp
|
||
+ IEEE80211_SCAN_RESULT_EXPIRE))
|
||
ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
|
||
else
|
||
ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
|
||
|
||
ieee80211_rx_bss_put(local, selected);
|
||
ieee80211_sta_reset_auth(sdata, ifsta);
|
||
return 0;
|
||
} else {
|
||
if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
|
||
ifsta->assoc_scan_tries++;
|
||
if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
|
||
ieee80211_start_scan(sdata, NULL, 0);
|
||
else
|
||
ieee80211_start_scan(sdata, ifsta->ssid,
|
||
ifsta->ssid_len);
|
||
ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
|
||
set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
|
||
} else
|
||
ifsta->state = IEEE80211_STA_MLME_DISABLED;
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
|
||
static void ieee80211_sta_work(struct work_struct *work)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata =
|
||
container_of(work, struct ieee80211_sub_if_data, u.sta.work);
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct ieee80211_if_sta *ifsta;
|
||
struct sk_buff *skb;
|
||
|
||
if (!netif_running(sdata->dev))
|
||
return;
|
||
|
||
if (local->sw_scanning || local->hw_scanning)
|
||
return;
|
||
|
||
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
|
||
sdata->vif.type != NL80211_IFTYPE_ADHOC))
|
||
return;
|
||
ifsta = &sdata->u.sta;
|
||
|
||
while ((skb = skb_dequeue(&ifsta->skb_queue)))
|
||
ieee80211_sta_rx_queued_mgmt(sdata, skb);
|
||
|
||
if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
|
||
ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
|
||
ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
|
||
test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
|
||
ieee80211_start_scan(sdata, ifsta->scan_ssid,
|
||
ifsta->scan_ssid_len);
|
||
return;
|
||
}
|
||
|
||
if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
|
||
if (ieee80211_sta_config_auth(sdata, ifsta))
|
||
return;
|
||
clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
|
||
} else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
|
||
return;
|
||
|
||
switch (ifsta->state) {
|
||
case IEEE80211_STA_MLME_DISABLED:
|
||
break;
|
||
case IEEE80211_STA_MLME_DIRECT_PROBE:
|
||
ieee80211_direct_probe(sdata, ifsta);
|
||
break;
|
||
case IEEE80211_STA_MLME_AUTHENTICATE:
|
||
ieee80211_authenticate(sdata, ifsta);
|
||
break;
|
||
case IEEE80211_STA_MLME_ASSOCIATE:
|
||
ieee80211_associate(sdata, ifsta);
|
||
break;
|
||
case IEEE80211_STA_MLME_ASSOCIATED:
|
||
ieee80211_associated(sdata, ifsta);
|
||
break;
|
||
case IEEE80211_STA_MLME_IBSS_SEARCH:
|
||
ieee80211_sta_find_ibss(sdata, ifsta);
|
||
break;
|
||
case IEEE80211_STA_MLME_IBSS_JOINED:
|
||
ieee80211_sta_merge_ibss(sdata, ifsta);
|
||
break;
|
||
default:
|
||
WARN_ON(1);
|
||
break;
|
||
}
|
||
|
||
if (ieee80211_privacy_mismatch(sdata, ifsta)) {
|
||
printk(KERN_DEBUG "%s: privacy configuration mismatch and "
|
||
"mixed-cell disabled - disassociate\n", sdata->dev->name);
|
||
|
||
ieee80211_set_disassoc(sdata, ifsta, false, true,
|
||
WLAN_REASON_UNSPECIFIED);
|
||
}
|
||
}
|
||
|
||
static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
|
||
{
|
||
if (sdata->vif.type == NL80211_IFTYPE_STATION)
|
||
queue_work(sdata->local->hw.workqueue,
|
||
&sdata->u.sta.work);
|
||
}
|
||
|
||
/* interface setup */
|
||
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
|
||
{
|
||
struct ieee80211_if_sta *ifsta;
|
||
|
||
ifsta = &sdata->u.sta;
|
||
INIT_WORK(&ifsta->work, ieee80211_sta_work);
|
||
setup_timer(&ifsta->timer, ieee80211_sta_timer,
|
||
(unsigned long) sdata);
|
||
skb_queue_head_init(&ifsta->skb_queue);
|
||
|
||
ifsta->capab = WLAN_CAPABILITY_ESS;
|
||
ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
|
||
IEEE80211_AUTH_ALG_SHARED_KEY;
|
||
ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
|
||
IEEE80211_STA_AUTO_BSSID_SEL |
|
||
IEEE80211_STA_AUTO_CHANNEL_SEL;
|
||
if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
|
||
ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
|
||
}
|
||
|
||
/*
|
||
* Add a new IBSS station, will also be called by the RX code when,
|
||
* in IBSS mode, receiving a frame from a yet-unknown station, hence
|
||
* must be callable in atomic context.
|
||
*/
|
||
struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
|
||
u8 *bssid,u8 *addr, u64 supp_rates)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
struct sta_info *sta;
|
||
int band = local->hw.conf.channel->band;
|
||
|
||
/* TODO: Could consider removing the least recently used entry and
|
||
* allow new one to be added. */
|
||
if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
|
||
if (net_ratelimit()) {
|
||
printk(KERN_DEBUG "%s: No room for a new IBSS STA "
|
||
"entry %pM\n", sdata->dev->name, addr);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
if (compare_ether_addr(bssid, sdata->u.sta.bssid))
|
||
return NULL;
|
||
|
||
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
||
printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
|
||
wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
|
||
#endif
|
||
|
||
sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
|
||
if (!sta)
|
||
return NULL;
|
||
|
||
set_sta_flags(sta, WLAN_STA_AUTHORIZED);
|
||
|
||
/* make sure mandatory rates are always added */
|
||
sta->sta.supp_rates[band] = supp_rates |
|
||
ieee80211_mandatory_rates(local, band);
|
||
|
||
rate_control_rate_init(sta);
|
||
|
||
if (sta_info_insert(sta))
|
||
return NULL;
|
||
|
||
return sta;
|
||
}
|
||
|
||
/* configuration hooks */
|
||
void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
|
||
struct ieee80211_if_sta *ifsta)
|
||
{
|
||
struct ieee80211_local *local = sdata->local;
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
||
return;
|
||
|
||
if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
|
||
IEEE80211_STA_AUTO_BSSID_SEL)) &&
|
||
(ifsta->flags & (IEEE80211_STA_SSID_SET |
|
||
IEEE80211_STA_AUTO_SSID_SEL))) {
|
||
|
||
if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
|
||
ieee80211_set_disassoc(sdata, ifsta, true, true,
|
||
WLAN_REASON_DEAUTH_LEAVING);
|
||
|
||
set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
|
||
queue_work(local->hw.workqueue, &ifsta->work);
|
||
}
|
||
}
|
||
|
||
int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
|
||
{
|
||
struct ieee80211_if_sta *ifsta;
|
||
|
||
if (len > IEEE80211_MAX_SSID_LEN)
|
||
return -EINVAL;
|
||
|
||
ifsta = &sdata->u.sta;
|
||
|
||
if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
|
||
memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
|
||
memcpy(ifsta->ssid, ssid, len);
|
||
ifsta->ssid_len = len;
|
||
ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
|
||
}
|
||
|
||
if (len)
|
||
ifsta->flags |= IEEE80211_STA_SSID_SET;
|
||
else
|
||
ifsta->flags &= ~IEEE80211_STA_SSID_SET;
|
||
|
||
if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
|
||
!(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
|
||
ifsta->ibss_join_req = jiffies;
|
||
ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
|
||
return ieee80211_sta_find_ibss(sdata, ifsta);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
|
||
{
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
|
||
*len = ifsta->ssid_len;
|
||
return 0;
|
||
}
|
||
|
||
int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
|
||
{
|
||
struct ieee80211_if_sta *ifsta;
|
||
int res;
|
||
|
||
ifsta = &sdata->u.sta;
|
||
|
||
if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
|
||
memcpy(ifsta->bssid, bssid, ETH_ALEN);
|
||
res = 0;
|
||
/*
|
||
* Hack! See also ieee80211_sta_set_ssid.
|
||
*/
|
||
if (netif_running(sdata->dev))
|
||
res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
|
||
if (res) {
|
||
printk(KERN_DEBUG "%s: Failed to config new BSSID to "
|
||
"the low-level driver\n", sdata->dev->name);
|
||
return res;
|
||
}
|
||
}
|
||
|
||
if (is_valid_ether_addr(bssid))
|
||
ifsta->flags |= IEEE80211_STA_BSSID_SET;
|
||
else
|
||
ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
|
||
|
||
return 0;
|
||
}
|
||
|
||
int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
|
||
{
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
|
||
kfree(ifsta->extra_ie);
|
||
if (len == 0) {
|
||
ifsta->extra_ie = NULL;
|
||
ifsta->extra_ie_len = 0;
|
||
return 0;
|
||
}
|
||
ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
|
||
if (!ifsta->extra_ie) {
|
||
ifsta->extra_ie_len = 0;
|
||
return -ENOMEM;
|
||
}
|
||
memcpy(ifsta->extra_ie, ie, len);
|
||
ifsta->extra_ie_len = len;
|
||
return 0;
|
||
}
|
||
|
||
int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
|
||
{
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
|
||
printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
|
||
sdata->dev->name, reason);
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_STATION &&
|
||
sdata->vif.type != NL80211_IFTYPE_ADHOC)
|
||
return -EINVAL;
|
||
|
||
ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
|
||
return 0;
|
||
}
|
||
|
||
int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
|
||
{
|
||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||
|
||
printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
|
||
sdata->dev->name, reason);
|
||
|
||
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
||
return -EINVAL;
|
||
|
||
if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
|
||
return -1;
|
||
|
||
ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
|
||
return 0;
|
||
}
|
||
|
||
/* scan finished notification */
|
||
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
|
||
{
|
||
struct ieee80211_sub_if_data *sdata = local->scan_sdata;
|
||
struct ieee80211_if_sta *ifsta;
|
||
|
||
if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
|
||
ifsta = &sdata->u.sta;
|
||
if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
|
||
(!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
|
||
!ieee80211_sta_active_ibss(sdata)))
|
||
ieee80211_sta_find_ibss(sdata, ifsta);
|
||
}
|
||
|
||
/* Restart STA timers */
|
||
rcu_read_lock();
|
||
list_for_each_entry_rcu(sdata, &local->interfaces, list)
|
||
ieee80211_restart_sta_timer(sdata);
|
||
rcu_read_unlock();
|
||
}
|
||
|
||
void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
|
||
{
|
||
struct ieee80211_local *local =
|
||
container_of(work, struct ieee80211_local,
|
||
dynamic_ps_disable_work);
|
||
|
||
if (local->hw.conf.flags & IEEE80211_CONF_PS) {
|
||
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
|
||
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
||
}
|
||
|
||
ieee80211_wake_queues_by_reason(&local->hw,
|
||
IEEE80211_QUEUE_STOP_REASON_PS);
|
||
}
|
||
|
||
void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
|
||
{
|
||
struct ieee80211_local *local =
|
||
container_of(work, struct ieee80211_local,
|
||
dynamic_ps_enable_work);
|
||
|
||
if (local->hw.conf.flags & IEEE80211_CONF_PS)
|
||
return;
|
||
|
||
local->hw.conf.flags |= IEEE80211_CONF_PS;
|
||
|
||
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
|
||
}
|
||
|
||
void ieee80211_dynamic_ps_timer(unsigned long data)
|
||
{
|
||
struct ieee80211_local *local = (void *) data;
|
||
|
||
queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
|
||
}
|