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mac80211: 11h - Handling measurement request 

This patch handles the 11h measurement request information element.
This is minimal requested implementation - refuse measurement.

Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Assaf Krauss 2008-06-16 16:09:49 +03:00 committed by John W. Linville
parent f2df38596a
commit b662348662
2 changed files with 88 additions and 0 deletions
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10
include/linux/ieee80211.h
View File

@ -739,11 +739,21 @@ struct ieee80211_ht_addt_info {
#define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
#define WLAN_CAPABILITY_PBCC (1<<6)
#define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
/* 802.11h */
#define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
#define WLAN_CAPABILITY_QOS (1<<9)
#define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
#define WLAN_CAPABILITY_DSSS_OFDM (1<<13)
/* measurement */
#define IEEE80211_SPCT_MSR_RPRT_MODE_LATE (1<<0)
#define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE (1<<1)
#define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED (1<<2)
#define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC 0
#define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA 1
#define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI 2
/* 802.11g ERP information element */
#define WLAN_ERP_NON_ERP_PRESENT (1<<0)

78
net/mac80211/mlme.c
View File

@ -1720,6 +1720,71 @@ void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
}
}
static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
struct ieee80211_msrment_ie *request_ie,
const u8 *da, const u8 *bssid,
u8 dialog_token)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sk_buff *skb;
struct ieee80211_mgmt *msr_report;
skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
sizeof(struct ieee80211_msrment_ie));
if (!skb) {
printk(KERN_ERR "%s: failed to allocate buffer for "
"measurement report frame\n", dev->name);
return;
}
skb_reserve(skb, local->hw.extra_tx_headroom);
msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
memset(msr_report, 0, 24);
memcpy(msr_report->da, da, ETH_ALEN);
memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
memcpy(msr_report->bssid, bssid, ETH_ALEN);
msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
IEEE80211_STYPE_ACTION);
skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
msr_report->u.action.u.measurement.action_code =
WLAN_ACTION_SPCT_MSR_RPRT;
msr_report->u.action.u.measurement.dialog_token = dialog_token;
msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
msr_report->u.action.u.measurement.length =
sizeof(struct ieee80211_msrment_ie);
memset(&msr_report->u.action.u.measurement.msr_elem, 0,
sizeof(struct ieee80211_msrment_ie));
msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
msr_report->u.action.u.measurement.msr_elem.mode |=
IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
ieee80211_sta_tx(dev, skb, 0);
}
static void ieee80211_sta_process_measurement_req(struct net_device *dev,
struct ieee80211_mgmt *mgmt,
size_t len)
{
/*
* Ignoring measurement request is spec violation.
* Mandatory measurements must be reported optional
* measurements might be refused or reported incapable
* For now just refuse
* TODO: Answer basic measurement as unmeasured
*/
ieee80211_send_refuse_measurement_request(dev,
&mgmt->u.action.u.measurement.msr_elem,
mgmt->sa, mgmt->bssid,
mgmt->u.action.u.measurement.dialog_token);
}
static void ieee80211_rx_mgmt_auth(struct net_device *dev,
struct ieee80211_if_sta *ifsta,
struct ieee80211_mgmt *mgmt,
@ -3044,11 +3109,24 @@ static void ieee80211_rx_mgmt_action(struct net_device *dev,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
if (len < IEEE80211_MIN_ACTION_SIZE)
return;
switch (mgmt->u.action.category) {
case WLAN_CATEGORY_SPECTRUM_MGMT:
if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
break;
switch (mgmt->u.action.u.chan_switch.action_code) {
case WLAN_ACTION_SPCT_MSR_REQ:
if (len < (IEEE80211_MIN_ACTION_SIZE +
sizeof(mgmt->u.action.u.measurement)))
break;
ieee80211_sta_process_measurement_req(dev, mgmt, len);
break;
}
break;
case WLAN_CATEGORY_BACK:
switch (mgmt->u.action.u.addba_req.action_code) {
case WLAN_ACTION_ADDBA_REQ: