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ieee80211_scan.c (232373) ieee80211_scan.c (241138)
1/*-
2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_scan.c 232373 2012-03-02 02:53:43Z adrian $");
27__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_scan.c 241138 2012-10-02 17:45:19Z adrian $");
28
29/*
30 * IEEE 802.11 scanning support.
31 */
32#include "opt_wlan.h"
33
34#include <sys/param.h>
35#include <sys/systm.h>

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861 "%s: no channels to scan\n", __func__);
862 goto done;
863 }
864
865 if (vap->iv_opmode == IEEE80211_M_STA &&
866 vap->iv_state == IEEE80211_S_RUN) {
867 if ((vap->iv_bss->ni_flags & IEEE80211_NODE_PWR_MGT) == 0) {
868 /* Enable station power save mode */
28
29/*
30 * IEEE 802.11 scanning support.
31 */
32#include "opt_wlan.h"
33
34#include <sys/param.h>
35#include <sys/systm.h>

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861 "%s: no channels to scan\n", __func__);
862 goto done;
863 }
864
865 if (vap->iv_opmode == IEEE80211_M_STA &&
866 vap->iv_state == IEEE80211_S_RUN) {
867 if ((vap->iv_bss->ni_flags & IEEE80211_NODE_PWR_MGT) == 0) {
868 /* Enable station power save mode */
869 ieee80211_sta_pwrsave(vap, 1);
869 vap->iv_sta_ps(vap, 1);
870 /*
871 * Use an 1ms delay so the null data frame has a chance
872 * to go out.
873 * XXX Should use M_TXCB mechanism to eliminate this.
874 */
875 cv_timedwait(&SCAN_PRIVATE(ss)->ss_scan_cv,
876 IEEE80211_LOCK_OBJ(ic), hz / 1000);
877 if (SCAN_PRIVATE(ss)->ss_iflags & ISCAN_ABORT)

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1042 * completed. If this scan was prematurely terminated
1043 * because it is a background scan then don't notify
1044 * the ap; we'll either return to scanning after we
1045 * receive the beacon frame or we'll drop out of power
1046 * save mode because the beacon indicates we have frames
1047 * waiting for us.
1048 */
1049 if (scandone) {
870 /*
871 * Use an 1ms delay so the null data frame has a chance
872 * to go out.
873 * XXX Should use M_TXCB mechanism to eliminate this.
874 */
875 cv_timedwait(&SCAN_PRIVATE(ss)->ss_scan_cv,
876 IEEE80211_LOCK_OBJ(ic), hz / 1000);
877 if (SCAN_PRIVATE(ss)->ss_iflags & ISCAN_ABORT)

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1042 * completed. If this scan was prematurely terminated
1043 * because it is a background scan then don't notify
1044 * the ap; we'll either return to scanning after we
1045 * receive the beacon frame or we'll drop out of power
1046 * save mode because the beacon indicates we have frames
1047 * waiting for us.
1048 */
1049 if (scandone) {
1050 ieee80211_sta_pwrsave(vap, 0);
1050 vap->iv_sta_ps(vap, 0);
1051 if (ss->ss_next >= ss->ss_last) {
1052 ieee80211_notify_scan_done(vap);
1053 ic->ic_flags_ext &= ~IEEE80211_FEXT_BGSCAN;
1054 }
1055 }
1056 SCAN_PRIVATE(ss)->ss_iflags &= ~(ISCAN_CANCEL|ISCAN_ABORT);
1057 ss->ss_flags &= ~(IEEE80211_SCAN_ONCE | IEEE80211_SCAN_PICK1ST);
1058 IEEE80211_UNLOCK(ic);

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1051 if (ss->ss_next >= ss->ss_last) {
1052 ieee80211_notify_scan_done(vap);
1053 ic->ic_flags_ext &= ~IEEE80211_FEXT_BGSCAN;
1054 }
1055 }
1056 SCAN_PRIVATE(ss)->ss_iflags &= ~(ISCAN_CANCEL|ISCAN_ABORT);
1057 ss->ss_flags &= ~(IEEE80211_SCAN_ONCE | IEEE80211_SCAN_PICK1ST);
1058 IEEE80211_UNLOCK(ic);

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