path: root/package/madwifi/patches/351-scanlist.patch

--- a/net80211/ieee80211_scan_sta.c
+++ b/net80211/ieee80211_scan_sta.c
@@ -317,147 +317,6 @@
 #undef ISPROBE
 }
 
-static struct ieee80211_channel *
-find11gchannel(struct ieee80211com *ic, int i, int freq)
-{
-	struct ieee80211_channel *c;
-	int j;
-
-	/*
-	 * The normal ordering in the channel list is b channel
-	 * immediately followed by g so optimize the search for
-	 * this.  We'll still do a full search just in case.
-	 */
-	for (j = i+1; j < ic->ic_nchans; j++) {
-		c = &ic->ic_channels[j];
-		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
-			return c;
-	}
-	for (j = 0; j < i; j++) {
-		c = &ic->ic_channels[j];
-		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
-			return c;
-	}
-	return NULL;
-}
-static const u_int chanflags[] = {
-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_AUTO */
-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_11A */
-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_11B */
-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_11G */
-	IEEE80211_CHAN_FHSS,	/* IEEE80211_MODE_FH */
-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_TURBO_A */ /* for turbo mode look for AP in normal channel */
-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_TURBO_G */
-	IEEE80211_CHAN_ST,	/* IEEE80211_MODE_TURBO_STATIC_A */
-};
-
-static void
-add_channels(struct ieee80211com *ic,
-	struct ieee80211_scan_state *ss,
-	enum ieee80211_phymode mode, const u_int16_t freq[], int nfreq)
-{
-	struct ieee80211_channel *c, *cg;
-	u_int modeflags;
-	int i;
-
-	KASSERT(mode < ARRAY_SIZE(chanflags), ("Unexpected mode %u", mode));
-	modeflags = chanflags[mode];
-	for (i = 0; i < nfreq; i++) {
-		c = ieee80211_find_channel(ic, freq[i], modeflags);
-		if (c == NULL || isclr(ic->ic_chan_active, c->ic_ieee))
-			continue;
-		if (mode == IEEE80211_MODE_AUTO) {
-			/*
-			 * XXX special-case 11b/g channels so we select
-			 *     the g channel if both are present.
-			 */
-			if (IEEE80211_IS_CHAN_B(c) &&
-			    (cg = find11gchannel(ic, i, c->ic_freq)) != NULL)
-				c = cg;
-		}
-		if (ss->ss_last >= IEEE80211_SCAN_MAX)
-			break;
-		ss->ss_chans[ss->ss_last++] = c;
-	}
-}
-
-static const u_int16_t rcl1[] =		/* 8 FCC channel: 52, 56, 60, 64, 36, 40, 44, 48 */
-{ 5260, 5280, 5300, 5320, 5180, 5200, 5220, 5240 };
-static const u_int16_t rcl2[] =		/* 4 MKK channels: 34, 38, 42, 46 */
-{ 5170, 5190, 5210, 5230 };
-static const u_int16_t rcl3[] =		/* 2.4Ghz ch: 1,6,11,7,13 */
-{ 2412, 2437, 2462, 2442, 2472 };
-static const u_int16_t rcl4[] =		/* 5 FCC channel: 149, 153, 161, 165 */
-{ 5745, 5765, 5785, 5805, 5825 };
-static const u_int16_t rcl7[] =		/* 11 ETSI channel: 100,104,108,112,116,120,124,128,132,136,140 */
-{ 5500, 5520, 5540, 5560, 5580, 5600, 5620, 5640, 5660, 5680, 5700 };
-static const u_int16_t rcl8[] =		/* 2.4Ghz ch: 2,3,4,5,8,9,10,12 */
-{ 2417, 2422, 2427, 2432, 2447, 2452, 2457, 2467 };
-static const u_int16_t rcl9[] =		/* 2.4Ghz ch: 14 */
-{ 2484 };
-static const u_int16_t rcl10[] =	/* Added Korean channels 2312-2372 */
-{ 2312, 2317, 2322, 2327, 2332, 2337, 2342, 2347, 2352, 2357, 2362, 2367, 2372 };
-static const u_int16_t rcl11[] =	/* Added Japan channels in 4.9/5.0 spectrum */
-{ 5040, 5060, 5080, 4920, 4940, 4960, 4980 };
-#ifdef ATH_TURBO_SCAN
-static const u_int16_t rcl5[] =		/* 3 static turbo channels */
-{ 5210, 5250, 5290 };
-static const u_int16_t rcl6[] =		/* 2 static turbo channels */
-{ 5760, 5800 };
-static const u_int16_t rcl6x[] =		/* 4 FCC3 turbo channels */
-{ 5540, 5580, 5620, 5660 };
-static const u_int16_t rcl12[] =		/* 2.4Ghz Turbo channel 6 */
-{ 2437 };
-static const u_int16_t rcl13[] =		/* dynamic Turbo channels */
-{ 5200, 5240, 5280, 5765, 5805 };
-#endif /* ATH_TURBO_SCAN */
-
-struct scanlist {
-	u_int16_t	mode;
-	u_int16_t	count;
-	const u_int16_t	*list;
-};
-
-#define	IEEE80211_MODE_TURBO_STATIC_A	IEEE80211_MODE_MAX
-#define	X(a)	.count = sizeof(a)/sizeof(a[0]), .list = a
-
-static const struct scanlist staScanTable[] = {
-	{ IEEE80211_MODE_11B,   		X(rcl3) },
-	{ IEEE80211_MODE_11A,   		X(rcl1) },
-	{ IEEE80211_MODE_11A,   		X(rcl2) },
-	{ IEEE80211_MODE_11B,   		X(rcl8) },
-	{ IEEE80211_MODE_11B,   		X(rcl9) },
-	{ IEEE80211_MODE_11A,   		X(rcl4) },
-#ifdef ATH_TURBO_SCAN
-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl5) },
-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl6) },
-	{ IEEE80211_MODE_TURBO_A,		X(rcl6x) },
-	{ IEEE80211_MODE_TURBO_A,		X(rcl13) },
-#endif /* ATH_TURBO_SCAN */
-	{ IEEE80211_MODE_11A,			X(rcl7) },
-	{ IEEE80211_MODE_11B,			X(rcl10) },
-	{ IEEE80211_MODE_11A,			X(rcl11) },
-#ifdef ATH_TURBO_SCAN
-	{ IEEE80211_MODE_TURBO_G,		X(rcl12) },
-#endif /* ATH_TURBO_SCAN */
-	{ .list = NULL }
-};
-
-#undef X
-
-static int
-checktable(const struct scanlist *scan, const struct ieee80211_channel *c)
-{
-	int i;
-
-	for (; scan->list != NULL; scan++) {
-		for (i = 0; i < scan->count; i++)
-			if (scan->list[i] == c->ic_freq)
-				return 1;
-	}
-	return 0;
-}
-
 /*
  * Start a station-mode scan by populating the channel list.
  */
@@ -466,81 +325,14 @@
 {
 	struct ieee80211com *ic = vap->iv_ic;
 	struct sta_table *st = ss->ss_priv;
-	const struct scanlist *scan;
 	enum ieee80211_phymode mode;
 	struct ieee80211_channel *c;
 	int i;
 
 	ss->ss_last = 0;
-	/*
-	 * Use the table of ordered channels to construct the list
-	 * of channels for scanning.  Any channels in the ordered
-	 * list not in the master list will be discarded.
-	 */
-	for (scan = staScanTable; scan->list != NULL; scan++) {
-		mode = scan->mode;
-		if (vap->iv_des_mode != IEEE80211_MODE_AUTO) {
-			/*
-			 * If a desired mode was specified, scan only 
-			 * channels that satisfy that constraint.
-			 */
-			if (vap->iv_des_mode != mode) {
-				/*
-				 * The scan table marks 2.4Ghz channels as b
-				 * so if the desired mode is 11g, then use
-				 * the 11b channel list but upgrade the mode.
-				 */
-				if (vap->iv_des_mode != IEEE80211_MODE_11G ||
-				    mode != IEEE80211_MODE_11B)
-					continue;
-				mode = IEEE80211_MODE_11G;	/* upgrade */
-			}
-		} else {
-			/*
-			 * This lets ieee80211_scan_add_channels
-			 * upgrade an 11b channel to 11g if available.
-			 */
-			if (mode == IEEE80211_MODE_11B)
-				mode = IEEE80211_MODE_AUTO;
-		}
-		/* XR does not operate on turbo channels */
-		if ((vap->iv_flags & IEEE80211_F_XR) &&
-		    (mode == IEEE80211_MODE_TURBO_A ||
-		     mode == IEEE80211_MODE_TURBO_G))
-			continue;
-		/*
-		 * Add the list of the channels; any that are not
-		 * in the master channel list will be discarded.
-		 */
-		add_channels(ic, ss, mode, scan->list, scan->count);
-	}
-
-	/*
-	 * Add the channels from the ic (from HAL) that are not present
-	 * in the staScanTable.
-	 */
-	for (i = 0; i < ic->ic_nchans; i++) {
-		c = &ic->ic_channels[i];
-		/*
-		 * scan dynamic turbo channels in normal mode.
-		 */
-		if (IEEE80211_IS_CHAN_DTURBO(c))
-			continue;
-		mode = ieee80211_chan2mode(c);
-		if (vap->iv_des_mode != IEEE80211_MODE_AUTO) {
-			/*
-			 * If a desired mode was specified, scan only 
-			 * channels that satisfy that constraint.
-			 */
-			if (vap->iv_des_mode != mode)
-				continue;
-
-		}
-		if (!checktable(staScanTable, c))
-			ss->ss_chans[ss->ss_last++] = c;
-	}
-
+	ieee80211_scan_add_channels(ic, ss, vap->iv_des_mode);
 	ss->ss_next = 0;
+
 	/* XXX tunables */
 	/* 
 	 * The scanner will stay on station for ss_maxdwell ms (using a 
@@ -749,17 +541,7 @@
 	fail = 0;
 	if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, se->se_chan)))
 		fail |= 0x01;
-	/*
-	 * NB: normally the desired mode is used to construct
-	 * the channel list, but it's possible for the scan
-	 * cache to include entries for stations outside this
-	 * list so we check the desired mode here to weed them
-	 * out.
-	 */
-	if (vap->iv_des_mode != IEEE80211_MODE_AUTO &&
-	    (se->se_chan->ic_flags & IEEE80211_CHAN_ALLTURBO) !=
-	    chanflags[vap->iv_des_mode])
-		fail |= 0x01;
+
 	if (vap->iv_opmode == IEEE80211_M_IBSS) {
 		if ((se->se_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
 			fail |= 0x02;
@@ -1168,78 +950,6 @@
 	.scan_default		= ieee80211_sta_join,
 };
 
-/*
- * Start an adhoc-mode scan by populating the channel list.
- */
-static int
-adhoc_start(struct ieee80211_scan_state *ss, struct ieee80211vap *vap)
-{
-	struct ieee80211com *ic = vap->iv_ic;
-	struct sta_table *st = ss->ss_priv;
-	const struct scanlist *scan;
-	enum ieee80211_phymode mode;
-
-	ss->ss_last = 0;
-	/*
-	 * Use the table of ordered channels to construct the list
-	 * of channels for scanning.  Any channels in the ordered
-	 * list not in the master list will be discarded.
-	 */
-	for (scan = staScanTable; scan->list != NULL; scan++) {
-		mode = scan->mode;
-		if (vap->iv_des_mode != IEEE80211_MODE_AUTO) {
-			/*
-			 * If a desired mode was specified, scan only 
-			 * channels that satisfy that constraint.
-			 */
-			if (vap->iv_des_mode != mode) {
-				/*
-				 * The scan table marks 2.4Ghz channels as b
-				 * so if the desired mode is 11g, then use
-				 * the 11b channel list but upgrade the mode.
-				 */
-				if (vap->iv_des_mode != IEEE80211_MODE_11G ||
-				    mode != IEEE80211_MODE_11B)
-					continue;
-				mode = IEEE80211_MODE_11G;	/* upgrade */
-			}
-		} else {
-			/*
-			 * This lets ieee80211_scan_add_channels
-			 * upgrade an 11b channel to 11g if available.
-			 */
-			if (mode == IEEE80211_MODE_11B)
-				mode = IEEE80211_MODE_AUTO;
-		}
-		/* XR does not operate on turbo channels */
-		if ((vap->iv_flags & IEEE80211_F_XR) &&
-		    (mode == IEEE80211_MODE_TURBO_A ||
-		     mode == IEEE80211_MODE_TURBO_G))
-			continue;
-		/*
-		 * Add the list of the channels; any that are not
-		 * in the master channel list will be discarded.
-		 */
-		add_channels(ic, ss, mode, scan->list, scan->count);
-	}
-	ss->ss_next = 0;
-	/* XXX tunables */
-	ss->ss_mindwell = msecs_to_jiffies(200);	/* 200ms */
-	ss->ss_maxdwell = msecs_to_jiffies(200);	/* 200ms */
-
-#ifdef IEEE80211_DEBUG
-	if (ieee80211_msg_scan(vap)) {
-		printk("%s: scan set ", vap->iv_dev->name);
-		ieee80211_scan_dump_channels(ss);
-		printk(" dwell min %ld max %ld\n",
-			ss->ss_mindwell, ss->ss_maxdwell);
-	}
-#endif /* IEEE80211_DEBUG */
-
-	st->st_newscan = 1;
-
-	return 0;
-}
 
 /*
  * Select a channel to start an adhoc network on.
@@ -1405,7 +1115,7 @@
 	.scan_name		= "default",
 	.scan_attach		= sta_attach,
 	.scan_detach		= sta_detach,
-	.scan_start		= adhoc_start,
+	.scan_start		= sta_start,
 	.scan_restart		= sta_restart,
 	.scan_cancel		= sta_cancel,
 	.scan_end		= adhoc_pick_bss,
--- a/net80211/ieee80211.c
+++ b/net80211/ieee80211.c
@@ -278,6 +278,11 @@
 			("channel with bogus ieee number %u", c->ic_ieee));
 		setbit(ic->ic_chan_avail, c->ic_ieee);
 
+		if (c->ic_scanflags & IEEE80211_NOSCAN_DEFAULT)
+			c->ic_scanflags |= IEEE80211_NOSCAN_SET;
+		else
+			c->ic_scanflags &= ~IEEE80211_NOSCAN_SET;
+
 		/* Identify mode capabilities. */
 		if (IEEE80211_IS_CHAN_A(c))
 			ic->ic_modecaps |= 1 << IEEE80211_MODE_11A;
--- a/net80211/_ieee80211.h
+++ b/net80211/_ieee80211.h
@@ -132,6 +132,11 @@
 	IEEE80211_SCAN_FIRST	= 2,	/* take first suitable candidate */
 };
 
+enum ieee80211_scanflags {
+	IEEE80211_NOSCAN_DEFAULT = (1 << 0),
+	IEEE80211_NOSCAN_SET     = (1 << 1),
+};
+
 /*
  * Channels are specified by frequency and attributes.
  */
@@ -142,6 +147,7 @@
 	int8_t ic_maxregpower;	/* maximum regulatory tx power in dBm */
 	int8_t ic_maxpower;	/* maximum tx power in dBm */
 	int8_t ic_minpower;	/* minimum tx power in dBm */
+	u_int8_t ic_scanflags;
 };
 
 #define	IEEE80211_CHAN_MAX	255
--- a/net80211/ieee80211_ioctl.h
+++ b/net80211/ieee80211_ioctl.h
@@ -555,6 +555,7 @@
 #define	IEEE80211_IOCTL_WDSADDMAC	(SIOCIWFIRSTPRIV+26)
 #define	IEEE80211_IOCTL_WDSDELMAC	(SIOCIWFIRSTPRIV+28)
 #define	IEEE80211_IOCTL_KICKMAC		(SIOCIWFIRSTPRIV+30)
+#define	IEEE80211_IOCTL_SETSCANLIST	(SIOCIWFIRSTPRIV+31)
 
 enum {
 	IEEE80211_WMMPARAMS_CWMIN       = 1,
--- a/net80211/ieee80211_scan_ap.c
+++ b/net80211/ieee80211_scan_ap.c
@@ -129,131 +129,7 @@
 
 static int ap_flush(struct ieee80211_scan_state *);
 static void action_tasklet(IEEE80211_TQUEUE_ARG);
-static struct ieee80211_channel *find11gchannel(struct ieee80211com *ic, 
-		int i, int freq);
 
-static const u_int chanflags[] = {
-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_AUTO */
-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_11A */
-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_11B */
-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_11G */
-	IEEE80211_CHAN_FHSS,	/* IEEE80211_MODE_FH */
-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_TURBO_A */ /* for turbo mode 
-							      * look for AP in 
-							      * normal channel 
-							      */
-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_TURBO_G */
-	IEEE80211_CHAN_ST,	/* IEEE80211_MODE_TURBO_STATIC_A */
-};
-
-static const u_int16_t rcl1[] =		/* 8 FCC channel: 52, 56, 60, 64, 
-					 *                36, 40, 44, 48 */
-{ 5260, 5280, 5300, 5320, 5180, 5200, 5220, 5240 };
-static const u_int16_t rcl2[] =		/* 4 MKK channels: 34, 38, 42, 46 */
-{ 5170, 5190, 5210, 5230 };
-static const u_int16_t rcl3[] =		/* 2.4Ghz ch: 1,6,11,7,13 */
-{ 2412, 2437, 2462, 2442, 2472 };
-static const u_int16_t rcl4[] =		/* 5 FCC channel: 149, 153, 161, 165 */
-{ 5745, 5765, 5785, 5805, 5825 };
-static const u_int16_t rcl7[] =		/* 11 ETSI channel: 100, 104, 108, 112,
-					 *                  116, 120, 124, 128, 
-					 *                  132, 136, 140 */
-{ 5500, 5520, 5540, 5560, 5580, 5600, 5620, 5640, 5660, 5680, 5700 };
-static const u_int16_t rcl8[] =		/* 2.4Ghz ch: 2,3,4,5,8,9,10,12 */
-{ 2417, 2422, 2427, 2432, 2447, 2452, 2457, 2467 };
-static const u_int16_t rcl9[] =		/* 2.4Ghz ch: 14 */
-{ 2484 };
-static const u_int16_t rcl10[] =	/* Added Korean channels 2312-2372 */
-{ 2312, 2317, 2322, 2327, 2332, 2337, 2342, 2347, 2352, 2357, 2362, 2367, 2372 };
-static const u_int16_t rcl11[] =	/* Added Japan channels in 4.9/5.0 spectrum */
-{ 5040, 5060, 5080, 4920, 4940, 4960, 4980 };
-#ifdef ATH_TURBO_SCAN
-static const u_int16_t rcl5[] =		/* 3 static turbo channels */
-{ 5210, 5250, 5290 };
-static const u_int16_t rcl6[] =		/* 2 static turbo channels */
-{ 5760, 5800 };
-static const u_int16_t rcl6x[] =		/* 4 FCC3 turbo channels */
-{ 5540, 5580, 5620, 5660 };
-static const u_int16_t rcl12[] =		/* 2.4Ghz Turbo channel 6 */
-{ 2437 };
-static const u_int16_t rcl13[] =		/* dynamic Turbo channels */
-{ 5200, 5240, 5280, 5765, 5805 };
-#endif /* ATH_TURBO_SCAN */
-
-struct scanlist {
-	u_int16_t	mode;
-	u_int16_t	count;
-	const u_int16_t	*list;
-};
-
-#define	IEEE80211_MODE_TURBO_STATIC_A	IEEE80211_MODE_MAX
-#define	X(a)	.count = ARRAY_SIZE(a), .list = a
-
-static const struct scanlist staScanTable[] = {
-	{ IEEE80211_MODE_11B,   		X(rcl3)  },
-	{ IEEE80211_MODE_11A,   		X(rcl1)  },
-	{ IEEE80211_MODE_11A,   		X(rcl2)  },
-	{ IEEE80211_MODE_11B,   		X(rcl8)  },
-	{ IEEE80211_MODE_11B,   		X(rcl9)  },
-	{ IEEE80211_MODE_11A,   		X(rcl4)  },
-#ifdef ATH_TURBO_SCAN
-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl5)  },
-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl6)  },
-	{ IEEE80211_MODE_TURBO_A,		X(rcl6x) },
-	{ IEEE80211_MODE_TURBO_A,		X(rcl13) },
-#endif /* ATH_TURBO_SCAN */
-	{ IEEE80211_MODE_11A,			X(rcl7)  },
-	{ IEEE80211_MODE_11B,			X(rcl10) },
-	{ IEEE80211_MODE_11A,			X(rcl11) },
-#ifdef ATH_TURBO_SCAN
-	{ IEEE80211_MODE_TURBO_G,		X(rcl12) },
-#endif /* ATH_TURBO_SCAN */
-	{ .list = NULL }
-};
-
-#undef X
-/* This function must be invoked with locks acquired */
-static void
-add_channels(struct ieee80211com *ic,
-	struct ieee80211_scan_state *ss,
-	enum ieee80211_phymode mode, const u_int16_t freq[], int nfreq)
-{
-	struct ieee80211_channel *c, *cg;
-	u_int modeflags;
-	int i;
-
-	KASSERT(mode < ARRAY_SIZE(chanflags), ("Unexpected mode %u", mode));
-	modeflags = chanflags[mode];
-	for (i = 0; i < nfreq; i++) {
-		c = ieee80211_find_channel(ic, freq[i], modeflags);
-		if ((c == NULL) || isclr(ic->ic_chan_active, c->ic_ieee))
-			continue;
-		if (mode == IEEE80211_MODE_AUTO) {
-			/* XXX special-case 11b/g channels so we select
-			 *     the g channel if both are present. */
-			if (IEEE80211_IS_CHAN_B(c) &&
-			    (cg = find11gchannel(ic, i, c->ic_freq)) != NULL)
-				c = cg;
-		}
-		if (ss->ss_last >= IEEE80211_SCAN_MAX)
-			break;
-		ss->ss_chans[ss->ss_last++] = c;
-	}
-}
-
-/* This function must be invoked with locks acquired */
-static int
-checktable(const struct scanlist *scan, const struct ieee80211_channel *c)
-{
-	int i;
-
-	for (; scan->list != NULL; scan++) {
-		for (i = 0; i < scan->count; i++)
-			if (scan->list[i] == c->ic_freq)
-				return 1;
-	}
-	return 0;
-}
 
 /*
  * Attach prior to any scanning work.
@@ -327,29 +203,6 @@
 		ieee80211_saveie(iep, ie);
 }
 
-/* This function must be invoked with locks acquired */
-static struct ieee80211_channel *
-find11gchannel(struct ieee80211com *ic, int i, int freq)
-{
-	struct ieee80211_channel *c;
-	int j;
-
-	/* The normal ordering in the channel list is b channel
-	 * immediately followed by g so optimize the search for
-	 * this.  We'll still do a full search just in case. */
-	for (j = i + 1; j < ic->ic_nchans; j++) {
-		c = &ic->ic_channels[j];
-		if ((c->ic_freq == freq) && IEEE80211_IS_CHAN_ANYG(c))
-			return c;
-	}
-	for (j = 0; j < i; j++) {
-		c = &ic->ic_channels[j];
-		if ((c->ic_freq == freq) && IEEE80211_IS_CHAN_ANYG(c))
-			return c;
-	}
-	return NULL;
-}
-
 /*
  * Start an ap scan by populating the channel list.
  */
@@ -358,8 +211,6 @@
 {
 	struct ap_state *as 	    = ss->ss_priv;
 	struct ieee80211com *ic     = NULL;
-	const struct scanlist *sl   = NULL;
-	struct ieee80211_channel *c = NULL;
 	int i;
 	unsigned int mode = 0;
 
@@ -368,80 +219,8 @@
 	/* Determine mode flags to match, or leave zero for auto mode */
 	as->as_vap_desired_mode = vap->iv_des_mode;
 	as->as_required_mode    = 0;
-	if (as->as_vap_desired_mode != IEEE80211_MODE_AUTO) {
-		as->as_required_mode = chanflags[as->as_vap_desired_mode];
-		if ((vap->iv_ath_cap & IEEE80211_ATHC_TURBOP) && 
-		    (as->as_required_mode != IEEE80211_CHAN_ST)) {
-			/* Fixup for dynamic turbo flags */
-			if (as->as_vap_desired_mode == IEEE80211_MODE_11G)
-				as->as_required_mode = IEEE80211_CHAN_108G;
-			else
-				as->as_required_mode = IEEE80211_CHAN_108A;
-		}
-	}
-
-	ss->ss_last = 0;
-	/* Use the table of ordered channels to construct the list
-	 * of channels for scanning.  Any channels in the ordered
-	 * list not in the master list will be discarded. */
-	for (sl = staScanTable; sl->list != NULL; sl++) {
-		mode = sl->mode;
-
-		/* The scan table marks 2.4Ghz channels as b
-		 * so if the desired mode is 11g, then use
-		 * the 11b channel list but upgrade the mode. */
-		if (as->as_vap_desired_mode &&
-		    (as->as_vap_desired_mode != mode) && 
-		    (as->as_vap_desired_mode == IEEE80211_MODE_11G) && 
-		    (mode == IEEE80211_MODE_11B))
-			mode = IEEE80211_MODE_11G;
-
-		/* If we are in "AUTO" mode, upgrade the mode to auto. 
-		 * This lets add_channels upgrade an 11b channel to 
-		 * 11g if available. */
-		if (!as->as_vap_desired_mode && (mode == IEEE80211_MODE_11B))
-			mode = IEEE80211_MODE_AUTO;
-
-		/* Add the list of the channels; any that are not
-		 * in the master channel list will be discarded. */
-		add_channels(ic, ss, mode, sl->list, sl->count);
-	}
-
-	/* Add the channels from the ic (from HAL) that are not present
-	 * in the staScanTable, assuming they pass the sanity checks... */
-	for (i = 0; i < ic->ic_nchans; i++) {
-		c = &ic->ic_channels[i];
-
-		/* XR is not supported on turbo channels */
-		if (IEEE80211_IS_CHAN_TURBO(c) && vap->iv_flags & IEEE80211_F_XR)
-			continue;
+	ieee80211_scan_add_channels(ic, ss, vap->iv_des_mode);
 
-		/* Dynamic channels are scanned in base mode */
-		if (!as->as_required_mode && !IEEE80211_IS_CHAN_ST(c))
-			continue;
-
-		/* Use any 11g channel instead of 11b one. */
-		if (vap->iv_des_mode == IEEE80211_MODE_AUTO && 
-		    IEEE80211_IS_CHAN_B(c) &&
-		    find11gchannel(ic, i, c->ic_freq))
-			continue;
-
-		/* Do not add channels already put into the scan list by the
-		 * scan table - these have already been filtered by mode
-		 * and for whether they are in the active channel list. */
-		if (checktable(staScanTable, c))
-			continue;
-
-		/* Make sure the channel is active */
-		if ((c == NULL) || isclr(ic->ic_chan_active, c->ic_ieee))
-			continue;
-
-		/* Don't overrun */
-		if (ss->ss_last >= IEEE80211_SCAN_MAX)
-			break;
-
-		ss->ss_chans[ss->ss_last++] = c;
-	}
 	ss->ss_next = 0;
 	/* XXX tunables */
 	ss->ss_mindwell = msecs_to_jiffies(200);	/* 200ms */
@@ -759,13 +538,6 @@
 		if (IEEE80211_IS_CHAN_RADAR(c->chan))
 			continue;
 
-		/* Do not select 802.11a ST if mode is specified and is not 
-		 * 802.11a ST */
-		if (as->as_required_mode &&
-		    IEEE80211_IS_CHAN_STURBO(c->chan) &&
-		    (as->as_vap_desired_mode != IEEE80211_MODE_TURBO_STATIC_A))
-			continue;
-
 		/* Verify mode matches any fixed mode specified */
 		if((c->chan->ic_flags & as->as_required_mode) != 
 				as->as_required_mode)
--- a/net80211/ieee80211_scan.c
+++ b/net80211/ieee80211_scan.c
@@ -958,6 +958,80 @@
 	}
 }
 
+static const u_int chanflags[] = {
+	0,	/* IEEE80211_MODE_AUTO */
+	IEEE80211_CHAN_A,	/* IEEE80211_MODE_11A */
+	IEEE80211_CHAN_B,	/* IEEE80211_MODE_11B */
+	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_11G */
+	IEEE80211_CHAN_FHSS,	/* IEEE80211_MODE_FH */
+	IEEE80211_CHAN_A,	/* IEEE80211_MODE_TURBO_A */ /* for turbo mode look for AP in normal channel */
+	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_TURBO_G */
+	IEEE80211_CHAN_ST,	/* IEEE80211_MODE_TURBO_STATIC_A */
+};
+
+static struct ieee80211_channel *
+find11gchannel(struct ieee80211com *ic, int i, int freq)
+{
+	struct ieee80211_channel *c;
+	int j;
+
+	/*
+	 * The normal ordering in the channel list is b channel
+	 * immediately followed by g so optimize the search for
+	 * this.  We'll still do a full search just in case.
+	 */
+	for (j = i+1; j < ic->ic_nchans; j++) {
+		c = &ic->ic_channels[j];
+		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
+			return c;
+	}
+	for (j = 0; j < i; j++) {
+		c = &ic->ic_channels[j];
+		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
+			return c;
+	}
+	return NULL;
+}
+
+
+void
+ieee80211_scan_add_channels(struct ieee80211com *ic,
+	struct ieee80211_scan_state *ss,
+	enum ieee80211_phymode mode)
+{
+	struct ieee80211_channel *c, *cg;
+	u_int modeflags;
+	int i;
+
+	KASSERT(mode < ARRAY_SIZE(chanflags), ("Unexpected mode %u", mode));
+	modeflags = chanflags[mode];
+	for (i = 0; i < ic->ic_nchans; i++) {
+		c = &ic->ic_channels[i];
+		if (c == NULL || isclr(ic->ic_chan_active, c->ic_ieee))
+			continue;
+		if (c->ic_scanflags & IEEE80211_NOSCAN_SET)
+			continue;
+		if (modeflags &&
+			((c->ic_flags & IEEE80211_CHAN_ALLTURBO) !=
+			 (modeflags & IEEE80211_CHAN_ALLTURBO)))
+			continue;
+		if (mode == IEEE80211_MODE_AUTO) {
+			/*
+			 * XXX special-case 11b/g channels so we select
+			 *     the g channel if both are present.
+			 */
+			if (IEEE80211_IS_CHAN_B(c) &&
+			    (cg = find11gchannel(ic, i, c->ic_freq)) != NULL)
+				continue;
+		}
+		if (ss->ss_last >= IEEE80211_SCAN_MAX)
+			break;
+		ss->ss_chans[ss->ss_last++] = c;
+	}
+}
+EXPORT_SYMBOL(ieee80211_scan_add_channels);
+
+
 /*
  * Execute radar channel change. This is called when a radar/dfs
  * signal is detected.  AP mode only.  Return 1 on success, 0 on
--- a/net80211/ieee80211_scan.h
+++ b/net80211/ieee80211_scan.h
@@ -219,4 +219,7 @@
 void ieee80211_scanner_unregister(enum ieee80211_opmode,
 	const struct ieee80211_scanner *);
 void ieee80211_scanner_unregister_all(const struct ieee80211_scanner *);
+void ieee80211_scan_add_channels(struct ieee80211com *ic,
+	struct ieee80211_scan_state *ss,
+	enum ieee80211_phymode mode);
 #endif /* _NET80211_IEEE80211_SCAN_H_ */
--- a/net80211/ieee80211_wireless.c
+++ b/net80211/ieee80211_wireless.c
@@ -3873,6 +3873,106 @@
 	return ieee80211_ioctl_setmlme(dev, info, w, (char *)&mlme);
 }
 
+static inline void setflag(struct ieee80211_channel *c, int flag)
+{
+	if (flag)
+		c->ic_scanflags |= IEEE80211_NOSCAN_SET;
+	else
+		c->ic_scanflags &= ~IEEE80211_NOSCAN_SET;
+}
+
+static void setscanflag(struct ieee80211com *ic, int min, int max, int set)
+{
+	int i;
+
+	for (i = 0; i < ic->ic_nchans; i++) {
+		struct ieee80211_channel *c = &ic->ic_channels[i];
+
+		if (min == -1) {
+			if (!(c->ic_scanflags & IEEE80211_NOSCAN_DEFAULT))
+				setflag(c, set);
+		} else if ((c->ic_freq >= min) && (c->ic_freq <= max)) {
+			setflag(c, set);
+		}
+	}
+}
+
+static int
+ieee80211_ioctl_setscanlist(struct net_device *dev,
+	struct iw_request_info *info,
+	struct iw_point *data, char *extra)
+{
+	struct ieee80211vap *vap = dev->priv;
+	struct ieee80211com *ic = vap->iv_ic;
+	char *s, *next;
+	int val = 1;
+
+	if (data->length <= 0)
+		return -EINVAL;
+
+	s = kmalloc(data->length + 1, GFP_KERNEL);
+	if (!s)
+		return -ENOMEM;
+
+	memset(s, 0, data->length + 1);
+	if (copy_from_user(s, data->pointer, data->length))
+		return -EFAULT;
+
+	s[data->length - 1] = '\0';		/* ensure null termination */
+
+	switch(*s) {
+		case '-':
+			val = 1;
+			break;
+		case '+':
+			val = 0;
+			break;
+		default:
+			goto error;
+	}
+	s++;
+	next = s;
+	do {
+		next = strchr(s, ',');
+		if (next) {
+			*next = 0;
+			next++;
+		}
+		if (!strcmp(s, "ALL")) {
+			setscanflag(ic, 0, 10000, val);
+		} else if (!strcmp(s, "REG")) {
+			setscanflag(ic, -1, -1, val);
+		} else {
+			int min, max;
+			char *n, *end = NULL;
+
+			n = strchr(s, '-');
+			if (n) {
+				*n = 0;
+				n++;
+			}
+			min = simple_strtoul(s, &end, 10);
+			if (end && *end)
+				goto error;
+			if (n) {
+				max = simple_strtoul(n, &end, 10);
+				if (end && *end)
+					goto error;
+			} else {
+				max = min;
+			}
+			setscanflag(ic, min, max, val);
+		}
+		s = next;
+	} while (next);
+	return 0;
+
+error:
+	if (s)
+		kfree(s);
+	return -EINVAL;
+}
+
 static int
 ieee80211_ioctl_addmac(struct net_device *dev, struct iw_request_info *info,
 	void *w, char *extra)
@@ -5656,6 +5756,8 @@
 	 IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "minrate"},
 	{IEEE80211_PARAM_MINRATE,
 	 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_minrate"},
+	{ IEEE80211_IOCTL_SETSCANLIST,
+	 IW_PRIV_TYPE_CHAR | 255, 0, "setscanlist"},
 
 #ifdef ATH_REVERSE_ENGINEERING
 	/*
@@ -5753,6 +5855,7 @@
 	set_priv(IEEE80211_IOCTL_WDSADDMAC, ieee80211_ioctl_wdsmac),
 	set_priv(IEEE80211_IOCTL_WDSDELMAC, ieee80211_ioctl_wdsdelmac),
 	set_priv(IEEE80211_IOCTL_KICKMAC, ieee80211_ioctl_kickmac),
+	set_priv(IEEE80211_IOCTL_SETSCANLIST, ieee80211_ioctl_setscanlist),
 #ifdef ATH_REVERSE_ENGINEERING
 	set_priv(IEEE80211_IOCTL_READREG, ieee80211_ioctl_readreg),
 	set_priv(IEEE80211_IOCTL_WRITEREG, ieee80211_ioctl_writereg),