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Differential D5142 Diff 13899 head/sys/net80211/ieee80211_scan_sw.c

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head/sys/net80211/ieee80211_scan_sw.c

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#define ROAM_RATE_HALF_DEFAULT 2*6 /* half-width 11a/g bss */ #define ROAM_RATE_HALF_DEFAULT 2*6 /* half-width 11a/g bss */
#define ROAM_RATE_QUARTER_DEFAULT 2*3 /* quarter-width 11a/g bss */ #define ROAM_RATE_QUARTER_DEFAULT 2*3 /* quarter-width 11a/g bss */
#define ROAM_MCS_11N_DEFAULT (1 | IEEE80211_RATE_MCS) /* 11n bss */ #define ROAM_MCS_11N_DEFAULT (1 | IEEE80211_RATE_MCS) /* 11n bss */
static void scan_curchan(struct ieee80211_scan_state *, unsigned long); static void scan_curchan(struct ieee80211_scan_state *, unsigned long);
static void scan_mindwell(struct ieee80211_scan_state *); static void scan_mindwell(struct ieee80211_scan_state *);
static void scan_signal(void *); static void scan_signal(void *);
static void scan_task(void *, int); static void scan_task(void *, int);
static void scan_done(struct ieee80211_scan_state *, int);
MALLOC_DEFINE(M_80211_SCAN, "80211scan", "802.11 scan state"); MALLOC_DEFINE(M_80211_SCAN, "80211scan", "802.11 scan state");
static void static void
ieee80211_swscan_detach(struct ieee80211com *ic) ieee80211_swscan_detach(struct ieee80211com *ic)
{ {
struct ieee80211_scan_state *ss = ic->ic_scan; struct ieee80211_scan_state *ss = ic->ic_scan;
▲ Show 20 Lines • Show All 488 Lines • ▼ Show 20 Lines#define ISCAN_REP (ISCAN_MINDWELL | ISCAN_DISCARD)
struct ieee80211_channel *chan; struct ieee80211_channel *chan;
unsigned long maxdwell; unsigned long maxdwell;
int scandone = 0; int scandone = 0;
IEEE80211_LOCK(ic); IEEE80211_LOCK(ic);
if (vap == NULL || (ic->ic_flags & IEEE80211_F_SCAN) == 0 || if (vap == NULL || (ic->ic_flags & IEEE80211_F_SCAN) == 0 ||
(ss_priv->ss_iflags & ISCAN_ABORT)) { (ss_priv->ss_iflags & ISCAN_ABORT)) {
/* Cancelled before we started */ /* Cancelled before we started */
goto done; scan_done(ss, 0);
return;
} }
if (ss->ss_next == ss->ss_last) { if (ss->ss_next == ss->ss_last) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: no channels to scan\n", __func__); "%s: no channels to scan\n", __func__);
scandone = 1; scan_done(ss, 1);
goto done; return;
} }
if (vap->iv_opmode == IEEE80211_M_STA && if (vap->iv_opmode == IEEE80211_M_STA &&
vap->iv_state == IEEE80211_S_RUN) { vap->iv_state == IEEE80211_S_RUN) {
if ((vap->iv_bss->ni_flags & IEEE80211_NODE_PWR_MGT) == 0) { if ((vap->iv_bss->ni_flags & IEEE80211_NODE_PWR_MGT) == 0) {
/* Enable station power save mode */ /* Enable station power save mode */
vap->iv_sta_ps(vap, 1); vap->iv_sta_ps(vap, 1);
/* /*
* Use an 1ms delay so the null data frame has a chance * Use an 1ms delay so the null data frame has a chance
* to go out. * to go out.
* XXX Should use M_TXCB mechanism to eliminate this. * XXX Should use M_TXCB mechanism to eliminate this.
*/ */
cv_timedwait(&ss_priv->ss_scan_cv, cv_timedwait(&ss_priv->ss_scan_cv,
IEEE80211_LOCK_OBJ(ic), msecs_to_ticks(1)); IEEE80211_LOCK_OBJ(ic), msecs_to_ticks(1));
if (ss_priv->ss_iflags & ISCAN_ABORT) if (ss_priv->ss_iflags & ISCAN_ABORT) {
goto done; scan_done(ss, 0);
return;
} }
} }
}
ss_priv->ss_scanend = ticks + ss_priv->ss_duration; ss_priv->ss_scanend = ticks + ss_priv->ss_duration;
/* XXX scan state can change! Re-validate scan state! */ /* XXX scan state can change! Re-validate scan state! */
IEEE80211_UNLOCK(ic); IEEE80211_UNLOCK(ic);
ic->ic_scan_start(ic); /* notify driver */ ic->ic_scan_start(ic); /* notify driver */
IEEE80211_LOCK(ic); IEEE80211_LOCK(ic);
▲ Show 20 Lines • Show All 75 Lines • ▼ Show 20 Lines for (;;) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: waiting\n", __func__); IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: waiting\n", __func__);
/* Wait to be signalled to scan the next channel */ /* Wait to be signalled to scan the next channel */
cv_wait(&ss_priv->ss_scan_cv, IEEE80211_LOCK_OBJ(ic)); cv_wait(&ss_priv->ss_scan_cv, IEEE80211_LOCK_OBJ(ic));
} }
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: out\n", __func__); IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: out\n", __func__);
if (ss_priv->ss_iflags & ISCAN_ABORT) if (ss_priv->ss_iflags & ISCAN_ABORT) {
goto done; scan_done(ss, scandone);
return;
}
IEEE80211_UNLOCK(ic); IEEE80211_UNLOCK(ic);
ic->ic_scan_end(ic); /* notify driver */ ic->ic_scan_end(ic); /* notify driver */
IEEE80211_LOCK(ic); IEEE80211_LOCK(ic);
/* XXX scan state can change! Re-validate scan state! */ /* XXX scan state can change! Re-validate scan state! */
/* /*
* Since a cancellation may have occured during one of the * Since a cancellation may have occured during one of the
▲ Show 20 Lines • Show All 71 Lines • ▼ Show 20 Lines#define ISCAN_REP (ISCAN_MINDWELL | ISCAN_DISCARD)
if (scandone == 0 && (ss_priv->ss_iflags & ISCAN_CANCEL) != 0) { if (scandone == 0 && (ss_priv->ss_iflags & ISCAN_CANCEL) != 0) {
/* XXX printf? */ /* XXX printf? */
if_printf(vap->iv_ifp, if_printf(vap->iv_ifp,
"%s: OOPS! scan cancelled during driver call (2)!\n", "%s: OOPS! scan cancelled during driver call (2)!\n",
__func__); __func__);
scandone = 1; scandone = 1;
} }
scan_done(ss, scandone);
}
static void
scan_done(struct ieee80211_scan_state *ss, int scandone)
{
struct scan_state *ss_priv = SCAN_PRIVATE(ss);
struct ieee80211com *ic = ss->ss_ic;
struct ieee80211vap *vap = ss->ss_vap;
IEEE80211_LOCK_ASSERT(ic);
/* /*
* Clear the SCAN bit first in case frames are * Clear the SCAN bit first in case frames are
* pending on the station power save queue. If * pending on the station power save queue. If
* we defer this then the dispatch of the frames * we defer this then the dispatch of the frames
* may generate a request to cancel scanning. * may generate a request to cancel scanning.
*/ */
done:
ic->ic_flags &= ~IEEE80211_F_SCAN; ic->ic_flags &= ~IEEE80211_F_SCAN;
/* /*
* Drop out of power save mode when a scan has * Drop out of power save mode when a scan has
* completed. If this scan was prematurely terminated * completed. If this scan was prematurely terminated
* because it is a background scan then don't notify * because it is a background scan then don't notify
* the ap; we'll either return to scanning after we * the ap; we'll either return to scanning after we
* receive the beacon frame or we'll drop out of power * receive the beacon frame or we'll drop out of power
* save mode because the beacon indicates we have frames * save mode because the beacon indicates we have frames
* waiting for us. * waiting for us.
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