![Johannes Berg](/assets/img/avatar_default.png)
Trying to separate header files into net/wireless.h and net/cfg80211.h has been a source of confusion. Remove net/wireless.h (because there also is the linux/wireless.h) and subsume everything into net/cfg80211.h -- except the definitions for regulatory structures which get moved to a new header net/regulatory.h. The "new" net/cfg80211.h is now divided into sections. There are no real changes in this patch but code shuffling and some very minor documentation fixes. I have also, to make things reflect reality, put in a copyright line for Luis to net/regulatory.h since that is probably exclusively written by him but was formerly in a file that only had my copyright line. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
188 lines
5.8 KiB
C
188 lines
5.8 KiB
C
/*
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* spectrum management
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*
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* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, 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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* Copyright 2007-2008, Intel Corporation
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.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/ieee80211.h>
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#include <net/cfg80211.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "sta_info.h"
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#include "wme.h"
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static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_msrment_ie *request_ie,
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const u8 *da, const u8 *bssid,
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u8 dialog_token)
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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 *msr_report;
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skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
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sizeof(struct ieee80211_msrment_ie));
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if (!skb) {
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printk(KERN_ERR "%s: failed to allocate buffer for "
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"measurement report 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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msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
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memset(msr_report, 0, 24);
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memcpy(msr_report->da, da, ETH_ALEN);
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memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
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memcpy(msr_report->bssid, bssid, ETH_ALEN);
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msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_ACTION);
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skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
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msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
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msr_report->u.action.u.measurement.action_code =
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WLAN_ACTION_SPCT_MSR_RPRT;
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msr_report->u.action.u.measurement.dialog_token = dialog_token;
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msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
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msr_report->u.action.u.measurement.length =
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sizeof(struct ieee80211_msrment_ie);
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memset(&msr_report->u.action.u.measurement.msr_elem, 0,
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sizeof(struct ieee80211_msrment_ie));
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msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
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msr_report->u.action.u.measurement.msr_elem.mode |=
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IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
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msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
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ieee80211_tx_skb(sdata, skb, 1);
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}
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void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_mgmt *mgmt,
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size_t len)
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{
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/*
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* Ignoring measurement request is spec violation.
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* Mandatory measurements must be reported optional
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* measurements might be refused or reported incapable
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* For now just refuse
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* TODO: Answer basic measurement as unmeasured
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*/
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ieee80211_send_refuse_measurement_request(sdata,
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&mgmt->u.action.u.measurement.msr_elem,
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mgmt->sa, mgmt->bssid,
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mgmt->u.action.u.measurement.dialog_token);
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}
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void ieee80211_chswitch_work(struct work_struct *work)
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{
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struct ieee80211_sub_if_data *sdata =
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container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
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struct ieee80211_bss *bss;
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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if (!netif_running(sdata->dev))
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return;
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bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
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sdata->local->hw.conf.channel->center_freq,
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ifmgd->ssid, ifmgd->ssid_len);
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if (!bss)
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goto exit;
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sdata->local->oper_channel = sdata->local->csa_channel;
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/* XXX: shouldn't really modify cfg80211-owned data! */
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if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
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bss->cbss.channel = sdata->local->oper_channel;
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ieee80211_rx_bss_put(sdata->local, bss);
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exit:
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ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
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ieee80211_wake_queues_by_reason(&sdata->local->hw,
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IEEE80211_QUEUE_STOP_REASON_CSA);
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}
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void ieee80211_chswitch_timer(unsigned long data)
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{
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struct ieee80211_sub_if_data *sdata =
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(struct ieee80211_sub_if_data *) data;
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
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}
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void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_channel_sw_ie *sw_elem,
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struct ieee80211_bss *bss)
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{
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struct ieee80211_channel *new_ch;
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
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/* FIXME: Handle ADHOC later */
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if (sdata->vif.type != NL80211_IFTYPE_STATION)
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return;
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if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
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return;
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if (sdata->local->sw_scanning || sdata->local->hw_scanning)
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return;
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/* Disregard subsequent beacons if we are already running a timer
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processing a CSA */
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if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
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return;
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new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
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if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
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return;
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sdata->local->csa_channel = new_ch;
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if (sw_elem->count <= 1) {
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queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
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} else {
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ieee80211_stop_queues_by_reason(&sdata->local->hw,
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IEEE80211_QUEUE_STOP_REASON_CSA);
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ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
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mod_timer(&ifmgd->chswitch_timer,
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jiffies +
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msecs_to_jiffies(sw_elem->count *
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bss->cbss.beacon_interval));
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}
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}
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void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
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u16 capab_info, u8 *pwr_constr_elem,
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u8 pwr_constr_elem_len)
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{
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struct ieee80211_conf *conf = &sdata->local->hw.conf;
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if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
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return;
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/* Power constraint IE length should be 1 octet */
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if (pwr_constr_elem_len != 1)
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return;
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if ((*pwr_constr_elem <= conf->channel->max_power) &&
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(*pwr_constr_elem != sdata->local->power_constr_level)) {
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sdata->local->power_constr_level = *pwr_constr_elem;
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ieee80211_hw_config(sdata->local, 0);
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}
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}
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