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Differential D5152 Diff 12915 sys/net80211/ieee80211_scan_sw.c

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sys/net80211/ieee80211_scan_sw.c

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#include <net80211/ieee80211_scan_sw.h> #include <net80211/ieee80211_scan_sw.h>
#include <net/bpf.h> #include <net/bpf.h>
struct scan_state { struct scan_state {
struct ieee80211_scan_state base; /* public state */ struct ieee80211_scan_state base; /* public state */
u_int ss_iflags; /* flags used internally */ u_int ss_iflags; /* flags used internally */
#define ISCAN_MINDWELL 0x0001 /* min dwell time reached */ #define ISCAN_MINDWELL 0x0001 /* min dwell time reached */
#define ISCAN_DISCARD 0x0002 /* discard rx'd frames */ #define ISCAN_DISCARD 0x0002 /* discard rx'd frames */
#define ISCAN_CANCEL 0x0004 /* cancel current scan */ #define ISCAN_CANCEL 0x0004 /* cancel current scan */
#define ISCAN_ABORT 0x0008 /* end the scan immediately */ #define ISCAN_ABORT 0x0008 /* end the scan immediately */
#define ISCAN_RUNNING 0x0010 /* scan was started */ #define ISCAN_RUNNING 0x0010 /* scan was started */
unsigned long ss_chanmindwell; /* min dwell on curchan */ unsigned long ss_chanmindwell; /* min dwell on curchan */
unsigned long ss_scanend; /* time scan must stop */ unsigned long ss_scanend; /* time scan must stop */
u_int ss_duration; /* duration for next scan */ u_int ss_duration; /* duration for next scan */
struct task ss_scan_start; /* scan start */ struct task ss_scan_start; /* scan start */
struct timeout_task ss_scan_curchan; /* scan execution */ struct timeout_task ss_scan_curchan; /* scan execution */
}; };
#define SCAN_PRIVATE(ss) ((struct scan_state *) ss) #define SCAN_PRIVATE(ss) ((struct scan_state *) ss)
/* /*
* Amount of time to go off-channel during a background * Amount of time to go off-channel during a background
* scan. This value should be large enough to catch most * scan. This value should be large enough to catch most
* ap's but short enough that we can return on-channel * ap's but short enough that we can return on-channel
* before our listen interval expires. * before our listen interval expires.
▲ Show 20 Lines • Show All 69 Lines • ▼ Show 20 Linesieee80211_swscan_vattach(struct ieee80211vap *vap)
*/ */
} }
static void static void
ieee80211_swscan_vdetach(struct ieee80211vap *vap) ieee80211_swscan_vdetach(struct ieee80211vap *vap)
{ {
struct ieee80211com *ic = vap->iv_ic; struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss; struct ieee80211_scan_state *ss = ic->ic_scan;
IEEE80211_LOCK_ASSERT(ic); IEEE80211_LOCK_ASSERT(ic);
ss = ic->ic_scan;
if (ss != NULL && ss->ss_vap == vap) { if (ss != NULL && ss->ss_vap == vap &&
if (ic->ic_flags & IEEE80211_F_SCAN) (ic->ic_flags & IEEE80211_F_SCAN))
scan_signal_locked(ss, ISCAN_ABORT); scan_signal_locked(ss, ISCAN_ABORT);
} }
}
static void static void
ieee80211_swscan_set_scan_duration(struct ieee80211vap *vap, u_int duration) ieee80211_swscan_set_scan_duration(struct ieee80211vap *vap, u_int duration)
{ {
struct ieee80211com *ic = vap->iv_ic; struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss = ic->ic_scan; struct ieee80211_scan_state *ss = ic->ic_scan;
IEEE80211_LOCK_ASSERT(ic); IEEE80211_LOCK_ASSERT(ic);
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* Manually stop a scan that is currently running. * Manually stop a scan that is currently running.
* Provided for drivers that are not able to scan single channels * Provided for drivers that are not able to scan single channels
* (e.g. for firmware-based devices). * (e.g. for firmware-based devices).
*/ */
static void static void
ieee80211_swscan_scan_done(struct ieee80211vap *vap) ieee80211_swscan_scan_done(struct ieee80211vap *vap)
{ {
struct ieee80211com *ic = vap->iv_ic; struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_scan_state *ss; struct ieee80211_scan_state *ss = ic->ic_scan;
IEEE80211_LOCK_ASSERT(ic); IEEE80211_LOCK_ASSERT(ic);
ss = ic->ic_scan;
scan_signal_locked(ss, 0); scan_signal_locked(ss, 0);
} }
/* /*
* Probe the current channel, if allowed, while scanning. * Probe the current channel, if allowed, while scanning.
* If the channel is not marked passive-only then send * If the channel is not marked passive-only then send
* a probe request immediately. Otherwise mark state and * a probe request immediately. Otherwise mark state and
* listen for beacons on the channel; if we receive something * listen for beacons on the channel; if we receive something
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* Scan curchan. If this is an active scan and the channel * Scan curchan. If this is an active scan and the channel
* is not marked passive then send probe request frame(s). * is not marked passive then send probe request frame(s).
* Arrange for the channel change after maxdwell ticks. * Arrange for the channel change after maxdwell ticks.
*/ */
static void static void
scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell) scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
{ {
struct ieee80211vap *vap = ss->ss_vap; struct ieee80211vap *vap = ss->ss_vap;
struct ieee80211com *ic = ss->ss_ic;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
"%s: calling; maxdwell=%lu\n", "%s: calling; maxdwell=%lu\n",
__func__, __func__,
maxdwell); maxdwell);
IEEE80211_LOCK(vap->iv_ic); IEEE80211_LOCK(ic);
if (ss->ss_flags & IEEE80211_SCAN_ACTIVE) if (ss->ss_flags & IEEE80211_SCAN_ACTIVE)
ieee80211_probe_curchan(vap, 0); ieee80211_probe_curchan(vap, 0);
taskqueue_enqueue_timeout(vap->iv_ic->ic_tq, taskqueue_enqueue_timeout(ic->ic_tq,
&SCAN_PRIVATE(ss)->ss_scan_curchan, maxdwell); &SCAN_PRIVATE(ss)->ss_scan_curchan, maxdwell);
IEEE80211_UNLOCK(vap->iv_ic); IEEE80211_UNLOCK(ic);
} }
static void static void
scan_signal(struct ieee80211_scan_state *ss, int iflags) scan_signal(struct ieee80211_scan_state *ss, int iflags)
{ {
struct ieee80211com *ic = ss->ss_ic; struct ieee80211com *ic = ss->ss_ic;
IEEE80211_UNLOCK_ASSERT(ic); IEEE80211_UNLOCK_ASSERT(ic);
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