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mac80211: track beacons separately from the rx path activity

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Separate beacon and rx path tracking in preparation for the beacon filtering
support. At the same time change ieee80211_associated() to look a bit simpler.

Probe requests are now sent only after IEEE80211_PROBE_IDLE_TIME, which
is now set to 60 seconds.

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Kalle Valo 2009-03-22 21:57:14 +02:00 committed by John W. Linville
parent 3cf335d527
commit 15b7b0629c
3 changed files with 52 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/mac80211/ieee80211_i.h
View File

@ -308,6 +308,7 @@ struct ieee80211_if_managed {
unsigned long request;
unsigned long last_probe;
unsigned long last_beacon;
unsigned int flags;

77
net/mac80211/mlme.c
View File

@ -30,7 +30,7 @@
#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
#define IEEE80211_ASSOC_MAX_TRIES 3
#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
#define IEEE80211_PROBE_INTERVAL (60 * HZ)
#define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
/* utils */
@ -930,7 +930,7 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
int disassoc;
bool disassoc = false;
/* TODO: start monitoring current AP signal quality and number of
* missed beacons. Scan other channels every now and then and search
@ -945,36 +945,39 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
if (!sta) {
printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
sdata->dev->name, ifmgd->bssid);
disassoc = 1;
} else {
disassoc = 0;
if (time_after(jiffies,
sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
printk(KERN_DEBUG "%s: No ProbeResp from "
"current AP %pM - assume out of "
"range\n",
sdata->dev->name, ifmgd->bssid);
disassoc = 1;
} else
ieee80211_send_probe_req(sdata, ifmgd->bssid,
ifmgd->ssid,
ifmgd->ssid_len,
NULL, 0);
ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
} else {
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
if (time_after(jiffies, ifmgd->last_probe +
IEEE80211_PROBE_INTERVAL)) {
ifmgd->last_probe = jiffies;
ieee80211_send_probe_req(sdata, ifmgd->bssid,
ifmgd->ssid,
ifmgd->ssid_len,
NULL, 0);
}
}
disassoc = true;
goto unlock;
}
if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
printk(KERN_DEBUG "%s: no probe response from AP %pM "
"- disassociating\n",
sdata->dev->name, ifmgd->bssid);
disassoc = true;
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
goto unlock;
}
if (time_after(jiffies,
ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
printk(KERN_DEBUG "%s: beacon loss from AP %pM "
"- sending probe request\n",
sdata->dev->name, ifmgd->bssid);
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
ifmgd->ssid_len, NULL, 0);
goto unlock;
}
if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
ifmgd->ssid_len, NULL, 0);
}
unlock:
rcu_read_unlock();
if (disassoc)
@ -1374,6 +1377,12 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
bss_conf->assoc_capability = capab_info;
ieee80211_set_associated(sdata, changed);
/*
* initialise the time of last beacon to be the association time,
* otherwise beacon loss check will trigger immediately
*/
ifmgd->last_beacon = jiffies;
ieee80211_associated(sdata);
cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
}
@ -1422,9 +1431,12 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
size_t len,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_if_managed *ifmgd;
size_t baselen;
struct ieee802_11_elems elems;
ifmgd = &sdata->u.mgd;
if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
return; /* ignore ProbeResp to foreign address */
@ -1439,11 +1451,14 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
/* direct probe may be part of the association flow */
if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
&sdata->u.mgd.request)) {
&ifmgd->request)) {
printk(KERN_DEBUG "%s direct probe responded\n",
sdata->dev->name);
ieee80211_authenticate(sdata);
}
if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
}
static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,

6
net/mac80211/rx.c
View File

@ -850,7 +850,11 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
* Mesh beacons will update last_rx when if they are found to
* match the current local configuration when processed.
*/
sta->last_rx = jiffies;
if (rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
ieee80211_is_beacon(hdr->frame_control)) {
rx->sdata->u.mgd.last_beacon = jiffies;
} else
sta->last_rx = jiffies;
}
if (!(rx->flags & IEEE80211_RX_RA_MATCH))