libertas: move association code from scan.c into assoc.c

Besides code moving, I did the following changes:

* made some functions static
* removed some unneeded #include's
* made patch checkpatch.pl clean
Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/assoc.c

@@ -5,6 +5,7 @@
 #include "assoc.h"
 #include "decl.h"
 #include "host.h"
+#include "scan.h"
 #include "cmd.h"
 
 
@@ -170,6 +171,272 @@ int lbs_stop_adhoc_network(struct lbs_private *priv)
 				     0, CMD_OPTION_WAITFORRSP, 0, NULL);
 }
 
+static inline int match_bss_no_security(struct lbs_802_11_security *secinfo,
+					struct bss_descriptor *match_bss)
+{
+	if (!secinfo->wep_enabled  && !secinfo->WPAenabled
+	    && !secinfo->WPA2enabled
+	    && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC
+	    && match_bss->rsn_ie[0] != MFIE_TYPE_RSN
+	    && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY))
+		return 1;
+	else
+		return 0;
+}
+
+static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo,
+				       struct bss_descriptor *match_bss)
+{
+	if (secinfo->wep_enabled && !secinfo->WPAenabled
+	    && !secinfo->WPA2enabled
+	    && (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
+		return 1;
+	else
+		return 0;
+}
+
+static inline int match_bss_wpa(struct lbs_802_11_security *secinfo,
+				struct bss_descriptor *match_bss)
+{
+	if (!secinfo->wep_enabled && secinfo->WPAenabled
+	    && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC)
+	    /* privacy bit may NOT be set in some APs like LinkSys WRT54G
+	    && (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
+	   )
+		return 1;
+	else
+		return 0;
+}
+
+static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo,
+				 struct bss_descriptor *match_bss)
+{
+	if (!secinfo->wep_enabled && secinfo->WPA2enabled &&
+	    (match_bss->rsn_ie[0] == MFIE_TYPE_RSN)
+	    /* privacy bit may NOT be set in some APs like LinkSys WRT54G
+	    (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
+	   )
+		return 1;
+	else
+		return 0;
+}
+
+static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo,
+					struct bss_descriptor *match_bss)
+{
+	if (!secinfo->wep_enabled && !secinfo->WPAenabled
+	    && !secinfo->WPA2enabled
+	    && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC)
+	    && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN)
+	    && (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
+		return 1;
+	else
+		return 0;
+}
+
+/**
+ *  @brief Check if a scanned network compatible with the driver settings
+ *
+ *   WEP     WPA     WPA2    ad-hoc  encrypt                      Network
+ * enabled enabled  enabled   AES     mode   privacy  WPA  WPA2  Compatible
+ *    0       0        0       0      NONE      0      0    0   yes No security
+ *    1       0        0       0      NONE      1      0    0   yes Static WEP
+ *    0       1        0       0       x        1x     1    x   yes WPA
+ *    0       0        1       0       x        1x     x    1   yes WPA2
+ *    0       0        0       1      NONE      1      0    0   yes Ad-hoc AES
+ *    0       0        0       0     !=NONE     1      0    0   yes Dynamic WEP
+ *
+ *
+ *  @param priv A pointer to struct lbs_private
+ *  @param index   Index in scantable to check against current driver settings
+ *  @param mode    Network mode: Infrastructure or IBSS
+ *
+ *  @return        Index in scantable, or error code if negative
+ */
+static int is_network_compatible(struct lbs_private *priv,
+				 struct bss_descriptor *bss, uint8_t mode)
+{
+	int matched = 0;
+
+	lbs_deb_enter(LBS_DEB_SCAN);
+
+	if (bss->mode != mode)
+		goto done;
+
+	matched = match_bss_no_security(&priv->secinfo, bss);
+	if (matched)
+		goto done;
+	matched = match_bss_static_wep(&priv->secinfo, bss);
+	if (matched)
+		goto done;
+	matched = match_bss_wpa(&priv->secinfo, bss);
+	if (matched) {
+		lbs_deb_scan("is_network_compatible() WPA: wpa_ie 0x%x "
+			     "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
+			     "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
+			     priv->secinfo.wep_enabled ? "e" : "d",
+			     priv->secinfo.WPAenabled ? "e" : "d",
+			     priv->secinfo.WPA2enabled ? "e" : "d",
+			     (bss->capability & WLAN_CAPABILITY_PRIVACY));
+		goto done;
+	}
+	matched = match_bss_wpa2(&priv->secinfo, bss);
+	if (matched) {
+		lbs_deb_scan("is_network_compatible() WPA2: wpa_ie 0x%x "
+			     "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
+			     "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
+			     priv->secinfo.wep_enabled ? "e" : "d",
+			     priv->secinfo.WPAenabled ? "e" : "d",
+			     priv->secinfo.WPA2enabled ? "e" : "d",
+			     (bss->capability & WLAN_CAPABILITY_PRIVACY));
+		goto done;
+	}
+	matched = match_bss_dynamic_wep(&priv->secinfo, bss);
+	if (matched) {
+		lbs_deb_scan("is_network_compatible() dynamic WEP: "
+			     "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n",
+			     bss->wpa_ie[0], bss->rsn_ie[0],
+			     (bss->capability & WLAN_CAPABILITY_PRIVACY));
+		goto done;
+	}
+
+	/* bss security settings don't match those configured on card */
+	lbs_deb_scan("is_network_compatible() FAILED: wpa_ie 0x%x "
+		     "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n",
+		     bss->wpa_ie[0], bss->rsn_ie[0],
+		     priv->secinfo.wep_enabled ? "e" : "d",
+		     priv->secinfo.WPAenabled ? "e" : "d",
+		     priv->secinfo.WPA2enabled ? "e" : "d",
+		     (bss->capability & WLAN_CAPABILITY_PRIVACY));
+
+done:
+	lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched);
+	return matched;
+}
+
+/**
+ *  @brief This function finds a specific compatible BSSID in the scan list
+ *
+ *  Used in association code
+ *
+ *  @param priv  A pointer to struct lbs_private
+ *  @param bssid    BSSID to find in the scan list
+ *  @param mode     Network mode: Infrastructure or IBSS
+ *
+ *  @return         index in BSSID list, or error return code (< 0)
+ */
+static struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv,
+					      uint8_t *bssid, uint8_t mode)
+{
+	struct bss_descriptor *iter_bss;
+	struct bss_descriptor *found_bss = NULL;
+
+	lbs_deb_enter(LBS_DEB_SCAN);
+
+	if (!bssid)
+		goto out;
+
+	lbs_deb_hex(LBS_DEB_SCAN, "looking for", bssid, ETH_ALEN);
+
+	/* Look through the scan table for a compatible match.  The loop will
+	 *   continue past a matched bssid that is not compatible in case there
+	 *   is an AP with multiple SSIDs assigned to the same BSSID
+	 */
+	mutex_lock(&priv->lock);
+	list_for_each_entry(iter_bss, &priv->network_list, list) {
+		if (compare_ether_addr(iter_bss->bssid, bssid))
+			continue; /* bssid doesn't match */
+		switch (mode) {
+		case IW_MODE_INFRA:
+		case IW_MODE_ADHOC:
+			if (!is_network_compatible(priv, iter_bss, mode))
+				break;
+			found_bss = iter_bss;
+			break;
+		default:
+			found_bss = iter_bss;
+			break;
+		}
+	}
+	mutex_unlock(&priv->lock);
+
+out:
+	lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
+	return found_bss;
+}
+
+/**
+ *  @brief This function finds ssid in ssid list.
+ *
+ *  Used in association code
+ *
+ *  @param priv  A pointer to struct lbs_private
+ *  @param ssid     SSID to find in the list
+ *  @param bssid    BSSID to qualify the SSID selection (if provided)
+ *  @param mode     Network mode: Infrastructure or IBSS
+ *
+ *  @return         index in BSSID list
+ */
+static struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv,
+					     uint8_t *ssid, uint8_t ssid_len,
+					     uint8_t *bssid, uint8_t mode,
+					     int channel)
+{
+	u32 bestrssi = 0;
+	struct bss_descriptor *iter_bss = NULL;
+	struct bss_descriptor *found_bss = NULL;
+	struct bss_descriptor *tmp_oldest = NULL;
+
+	lbs_deb_enter(LBS_DEB_SCAN);
+
+	mutex_lock(&priv->lock);
+
+	list_for_each_entry(iter_bss, &priv->network_list, list) {
+		if (!tmp_oldest ||
+		    (iter_bss->last_scanned < tmp_oldest->last_scanned))
+			tmp_oldest = iter_bss;
+
+		if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len,
+				 ssid, ssid_len) != 0)
+			continue; /* ssid doesn't match */
+		if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0)
+			continue; /* bssid doesn't match */
+		if ((channel > 0) && (iter_bss->channel != channel))
+			continue; /* channel doesn't match */
+
+		switch (mode) {
+		case IW_MODE_INFRA:
+		case IW_MODE_ADHOC:
+			if (!is_network_compatible(priv, iter_bss, mode))
+				break;
+
+			if (bssid) {
+				/* Found requested BSSID */
+				found_bss = iter_bss;
+				goto out;
+			}
+
+			if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
+				bestrssi = SCAN_RSSI(iter_bss->rssi);
+				found_bss = iter_bss;
+			}
+			break;
+		case IW_MODE_AUTO:
+		default:
+			if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
+				bestrssi = SCAN_RSSI(iter_bss->rssi);
+				found_bss = iter_bss;
+			}
+			break;
+		}
+	}
+
+out:
+	mutex_unlock(&priv->lock);
+	lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
+	return found_bss;
+}
+
 static int assoc_helper_essid(struct lbs_private *priv,
                               struct assoc_request * assoc_req)
 {
@@ -617,6 +884,91 @@ static int should_stop_adhoc(struct lbs_private *priv,
 }
 
 
+/**
+ *  @brief This function finds the best SSID in the Scan List
+ *
+ *  Search the scan table for the best SSID that also matches the current
+ *   adapter network preference (infrastructure or adhoc)
+ *
+ *  @param priv  A pointer to struct lbs_private
+ *
+ *  @return         index in BSSID list
+ */
+static struct bss_descriptor *lbs_find_best_ssid_in_list(
+	struct lbs_private *priv, uint8_t mode)
+{
+	uint8_t bestrssi = 0;
+	struct bss_descriptor *iter_bss;
+	struct bss_descriptor *best_bss = NULL;
+
+	lbs_deb_enter(LBS_DEB_SCAN);
+
+	mutex_lock(&priv->lock);
+
+	list_for_each_entry(iter_bss, &priv->network_list, list) {
+		switch (mode) {
+		case IW_MODE_INFRA:
+		case IW_MODE_ADHOC:
+			if (!is_network_compatible(priv, iter_bss, mode))
+				break;
+			if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
+				break;
+			bestrssi = SCAN_RSSI(iter_bss->rssi);
+			best_bss = iter_bss;
+			break;
+		case IW_MODE_AUTO:
+		default:
+			if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
+				break;
+			bestrssi = SCAN_RSSI(iter_bss->rssi);
+			best_bss = iter_bss;
+			break;
+		}
+	}
+
+	mutex_unlock(&priv->lock);
+	lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss);
+	return best_bss;
+}
+
+/**
+ *  @brief Find the best AP
+ *
+ *  Used from association worker.
+ *
+ *  @param priv         A pointer to struct lbs_private structure
+ *  @param pSSID        A pointer to AP's ssid
+ *
+ *  @return             0--success, otherwise--fail
+ */
+static int lbs_find_best_network_ssid(struct lbs_private *priv,
+	uint8_t *out_ssid, uint8_t *out_ssid_len, uint8_t preferred_mode,
+	uint8_t *out_mode)
+{
+	int ret = -1;
+	struct bss_descriptor *found;
+
+	lbs_deb_enter(LBS_DEB_SCAN);
+
+	priv->scan_ssid_len = 0;
+	lbs_scan_networks(priv, 1);
+	if (priv->surpriseremoved)
+		goto out;
+
+	found = lbs_find_best_ssid_in_list(priv, preferred_mode);
+	if (found && (found->ssid_len > 0)) {
+		memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE);
+		*out_ssid_len = found->ssid_len;
+		*out_mode = found->mode;
+		ret = 0;
+	}
+
+out:
+	lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
+	return ret;
+}
+
+
 void lbs_association_worker(struct work_struct *work)
 {
 	struct lbs_private *priv = container_of(work, struct lbs_private,

drivers/net/wireless/libertas/dev.h

@@ -10,9 +10,10 @@
 #include <linux/wireless.h>
 #include <linux/ethtool.h>
 #include <linux/debugfs.h>
+#include <net/ieee80211.h>
 
 #include "defs.h"
-#include "scan.h"
+#include "hostcmd.h"
 
 extern struct ethtool_ops lbs_ethtool_ops;
 
@@ -325,6 +326,44 @@ struct lbs_private {
 
 extern struct cmd_confirm_sleep confirm_sleep;
 
+/**
+ *  @brief Structure used to store information for each beacon/probe response
+ */
+struct bss_descriptor {
+	u8 bssid[ETH_ALEN];
+
+	u8 ssid[IW_ESSID_MAX_SIZE + 1];
+	u8 ssid_len;
+
+	u16 capability;
+	u32 rssi;
+	u32 channel;
+	u16 beaconperiod;
+	u32 atimwindow;
+
+	/* IW_MODE_AUTO, IW_MODE_ADHOC, IW_MODE_INFRA */
+	u8 mode;
+
+	/* zero-terminated array of supported data rates */
+	u8 rates[MAX_RATES + 1];
+
+	unsigned long last_scanned;
+
+	union ieeetypes_phyparamset phyparamset;
+	union IEEEtypes_ssparamset ssparamset;
+
+	struct ieeetypes_countryinfofullset countryinfo;
+
+	u8 wpa_ie[MAX_WPA_IE_LEN];
+	size_t wpa_ie_len;
+	u8 rsn_ie[MAX_WPA_IE_LEN];
+	size_t rsn_ie_len;
+
+	u8 mesh;
+
+	struct list_head list;
+};
+
 /** Association request
  *
  * Encapsulates all the options that describe a specific assocation request

drivers/net/wireless/libertas/main.c

@@ -19,6 +19,7 @@
 #include "dev.h"
 #include "wext.h"
 #include "debugfs.h"
+#include "scan.h"
 #include "assoc.h"
 #include "cmd.h"
 

drivers/net/wireless/libertas/scan.c

@@ -4,22 +4,13 @@
   * IOCTL handlers as well as command preperation and response routines
   *  for sending scan commands to the firmware.
   */
-#include <linux/ctype.h>
-#include <linux/if.h>
-#include <linux/netdevice.h>
-#include <linux/wireless.h>
 #include <linux/etherdevice.h>
-
-#include <net/ieee80211.h>
-#include <net/iw_handler.h>
-
 #include <asm/unaligned.h>
 
 #include "host.h"
 #include "decl.h"
 #include "dev.h"
 #include "scan.h"
-#include "assoc.h"
 #include "cmd.h"
 
 //! Approximate amount of data needed to pass a scan result back to iwlist
@@ -110,69 +101,6 @@ int lbs_ssid_cmp(uint8_t *ssid1, uint8_t ssid1_len, uint8_t *ssid2,
 	return memcmp(ssid1, ssid2, ssid1_len);
 }
 
-static inline int match_bss_no_security(struct lbs_802_11_security *secinfo,
-					struct bss_descriptor *match_bss)
-{
-	if (!secinfo->wep_enabled  && !secinfo->WPAenabled
-	    && !secinfo->WPA2enabled
-	    && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC
-	    && match_bss->rsn_ie[0] != MFIE_TYPE_RSN
-	    && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY))
-		return 1;
-	else
-		return 0;
-}
-
-static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo,
-				       struct bss_descriptor *match_bss)
-{
-	if (secinfo->wep_enabled && !secinfo->WPAenabled
-	    && !secinfo->WPA2enabled
-	    && (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
-		return 1;
-	else
-		return 0;
-}
-
-static inline int match_bss_wpa(struct lbs_802_11_security *secinfo,
-				struct bss_descriptor *match_bss)
-{
-	if (!secinfo->wep_enabled && secinfo->WPAenabled
-	    && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC)
-	    /* privacy bit may NOT be set in some APs like LinkSys WRT54G
-	    && (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
-	   )
-		return 1;
-	else
-		return 0;
-}
-
-static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo,
-				 struct bss_descriptor *match_bss)
-{
-	if (!secinfo->wep_enabled && secinfo->WPA2enabled
-	    && (match_bss->rsn_ie[0] == MFIE_TYPE_RSN)
-	    /* privacy bit may NOT be set in some APs like LinkSys WRT54G
-            && (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
-	   )
-		return 1;
-	else
-		return 0;
-}
-
-static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo,
-					struct bss_descriptor *match_bss)
-{
-	if (!secinfo->wep_enabled && !secinfo->WPAenabled
-	    && !secinfo->WPA2enabled
-	    && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC)
-	    && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN)
-	    && (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
-		return 1;
-	else
-		return 0;
-}
-
 static inline int is_same_network(struct bss_descriptor *src,
 				  struct bss_descriptor *dst)
 {
@@ -185,78 +113,6 @@ static inline int is_same_network(struct bss_descriptor *src,
 		!memcmp(src->ssid, dst->ssid, src->ssid_len));
 }
 
-/**
- *  @brief Check if a scanned network compatible with the driver settings
- *
- *   WEP     WPA     WPA2    ad-hoc  encrypt                      Network
- * enabled enabled  enabled   AES     mode   privacy  WPA  WPA2  Compatible
- *    0       0        0       0      NONE      0      0    0   yes No security
- *    1       0        0       0      NONE      1      0    0   yes Static WEP
- *    0       1        0       0       x        1x     1    x   yes WPA
- *    0       0        1       0       x        1x     x    1   yes WPA2
- *    0       0        0       1      NONE      1      0    0   yes Ad-hoc AES
- *    0       0        0       0     !=NONE     1      0    0   yes Dynamic WEP
- *
- *
- *  @param priv A pointer to struct lbs_private
- *  @param index   Index in scantable to check against current driver settings
- *  @param mode    Network mode: Infrastructure or IBSS
- *
- *  @return        Index in scantable, or error code if negative
- */
-static int is_network_compatible(struct lbs_private *priv,
-				 struct bss_descriptor *bss, uint8_t mode)
-{
-	int matched = 0;
-
-	lbs_deb_enter(LBS_DEB_SCAN);
-
-	if (bss->mode != mode)
-		goto done;
-
-	if ((matched = match_bss_no_security(&priv->secinfo, bss))) {
-		goto done;
-	} else if ((matched = match_bss_static_wep(&priv->secinfo, bss))) {
-		goto done;
-	} else if ((matched = match_bss_wpa(&priv->secinfo, bss))) {
-		lbs_deb_scan("is_network_compatible() WPA: wpa_ie 0x%x "
-			     "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
-			     "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
-			     priv->secinfo.wep_enabled ? "e" : "d",
-			     priv->secinfo.WPAenabled ? "e" : "d",
-			     priv->secinfo.WPA2enabled ? "e" : "d",
-			     (bss->capability & WLAN_CAPABILITY_PRIVACY));
-		goto done;
-	} else if ((matched = match_bss_wpa2(&priv->secinfo, bss))) {
-		lbs_deb_scan("is_network_compatible() WPA2: wpa_ie 0x%x "
-			     "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
-			     "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
-			     priv->secinfo.wep_enabled ? "e" : "d",
-			     priv->secinfo.WPAenabled ? "e" : "d",
-			     priv->secinfo.WPA2enabled ? "e" : "d",
-			     (bss->capability & WLAN_CAPABILITY_PRIVACY));
-		goto done;
-	} else if ((matched = match_bss_dynamic_wep(&priv->secinfo, bss))) {
-		lbs_deb_scan("is_network_compatible() dynamic WEP: "
-			     "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n",
-			     bss->wpa_ie[0], bss->rsn_ie[0],
-			     (bss->capability & WLAN_CAPABILITY_PRIVACY));
-		goto done;
-	}
-
-	/* bss security settings don't match those configured on card */
-	lbs_deb_scan("is_network_compatible() FAILED: wpa_ie 0x%x "
-		     "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n",
-		     bss->wpa_ie[0], bss->rsn_ie[0],
-		     priv->secinfo.wep_enabled ? "e" : "d",
-		     priv->secinfo.WPAenabled ? "e" : "d",
-		     priv->secinfo.WPA2enabled ? "e" : "d",
-		     (bss->capability & WLAN_CAPABILITY_PRIVACY));
-
-done:
-	lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched);
-	return matched;
-}
 
 
 
@@ -341,7 +197,6 @@ static int lbs_scan_create_channel_list(struct lbs_private *priv,
 	return chanidx;
 }
 
-
 /*
  * Add SSID TLV of the form:
  *
@@ -359,7 +214,6 @@ static int lbs_scan_add_ssid_tlv(struct lbs_private *priv, u8 *tlv)
 	return sizeof(ssid_tlv->header) + priv->scan_ssid_len;
 }
 
-
 /*
  * Add CHANLIST TLV of the form
  *
@@ -398,7 +252,6 @@ static int lbs_scan_add_chanlist_tlv(uint8_t *tlv,
 	return sizeof(chan_tlv->header) + size;
 }
 
-
 /*
  * Add RATES TLV of the form
  *
@@ -433,7 +286,6 @@ static int lbs_scan_add_rates_tlv(uint8_t *tlv)
 	return sizeof(rate_tlv->header) + i;
 }
 
-
 /*
  * Generate the CMD_802_11_SCAN command with the proper tlv
  * for a bunch of channels.
@@ -482,12 +334,9 @@ static int lbs_do_scan(struct lbs_private *priv, uint8_t bsstype,
 	return ret;
 }
 
-
 /**
  *  @brief Internal function used to start a scan based on an input config
  *
- *  Also used from debugfs
- *
  *  Use the input user scan configuration information when provided in
  *    order to send the appropriate scan commands to firmware to populate or
  *    update the internal driver scan table
@@ -497,7 +346,7 @@ static int lbs_do_scan(struct lbs_private *priv, uint8_t bsstype,
  *
  *  @return              0 or < 0 if error
  */
-static int lbs_scan_networks(struct lbs_private *priv, int full_scan)
+int lbs_scan_networks(struct lbs_private *priv, int full_scan)
 {
 	int ret = -ENOMEM;
 	struct chanscanparamset *chan_list;
@@ -627,9 +476,6 @@ static int lbs_scan_networks(struct lbs_private *priv, int full_scan)
 	return ret;
 }
 
-
-
-
 void lbs_scan_worker(struct work_struct *work)
 {
 	struct lbs_private *priv =
@@ -880,214 +726,6 @@ static int lbs_process_bss(struct bss_descriptor *bss,
 	return ret;
 }
 
-/**
- *  @brief This function finds a specific compatible BSSID in the scan list
- *
- *  Used in association code
- *
- *  @param priv  A pointer to struct lbs_private
- *  @param bssid    BSSID to find in the scan list
- *  @param mode     Network mode: Infrastructure or IBSS
- *
- *  @return         index in BSSID list, or error return code (< 0)
- */
-struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv,
-					      uint8_t *bssid, uint8_t mode)
-{
-	struct bss_descriptor *iter_bss;
-	struct bss_descriptor *found_bss = NULL;
-
-	lbs_deb_enter(LBS_DEB_SCAN);
-
-	if (!bssid)
-		goto out;
-
-	lbs_deb_hex(LBS_DEB_SCAN, "looking for", bssid, ETH_ALEN);
-
-	/* Look through the scan table for a compatible match.  The loop will
-	 *   continue past a matched bssid that is not compatible in case there
-	 *   is an AP with multiple SSIDs assigned to the same BSSID
-	 */
-	mutex_lock(&priv->lock);
-	list_for_each_entry (iter_bss, &priv->network_list, list) {
-		if (compare_ether_addr(iter_bss->bssid, bssid))
-			continue; /* bssid doesn't match */
-		switch (mode) {
-		case IW_MODE_INFRA:
-		case IW_MODE_ADHOC:
-			if (!is_network_compatible(priv, iter_bss, mode))
-				break;
-			found_bss = iter_bss;
-			break;
-		default:
-			found_bss = iter_bss;
-			break;
-		}
-	}
-	mutex_unlock(&priv->lock);
-
-out:
-	lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
-	return found_bss;
-}
-
-/**
- *  @brief This function finds ssid in ssid list.
- *
- *  Used in association code
- *
- *  @param priv  A pointer to struct lbs_private
- *  @param ssid     SSID to find in the list
- *  @param bssid    BSSID to qualify the SSID selection (if provided)
- *  @param mode     Network mode: Infrastructure or IBSS
- *
- *  @return         index in BSSID list
- */
-struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv,
-					     uint8_t *ssid, uint8_t ssid_len,
-					     uint8_t *bssid, uint8_t mode,
-					     int channel)
-{
-	u32 bestrssi = 0;
-	struct bss_descriptor * iter_bss = NULL;
-	struct bss_descriptor * found_bss = NULL;
-	struct bss_descriptor * tmp_oldest = NULL;
-
-	lbs_deb_enter(LBS_DEB_SCAN);
-
-	mutex_lock(&priv->lock);
-
-	list_for_each_entry (iter_bss, &priv->network_list, list) {
-		if (   !tmp_oldest
-		    || (iter_bss->last_scanned < tmp_oldest->last_scanned))
-			tmp_oldest = iter_bss;
-
-		if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len,
-				 ssid, ssid_len) != 0)
-			continue; /* ssid doesn't match */
-		if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0)
-			continue; /* bssid doesn't match */
-		if ((channel > 0) && (iter_bss->channel != channel))
-			continue; /* channel doesn't match */
-
-		switch (mode) {
-		case IW_MODE_INFRA:
-		case IW_MODE_ADHOC:
-			if (!is_network_compatible(priv, iter_bss, mode))
-				break;
-
-			if (bssid) {
-				/* Found requested BSSID */
-				found_bss = iter_bss;
-				goto out;
-			}
-
-			if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
-				bestrssi = SCAN_RSSI(iter_bss->rssi);
-				found_bss = iter_bss;
-			}
-			break;
-		case IW_MODE_AUTO:
-		default:
-			if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
-				bestrssi = SCAN_RSSI(iter_bss->rssi);
-				found_bss = iter_bss;
-			}
-			break;
-		}
-	}
-
-out:
-	mutex_unlock(&priv->lock);
-	lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
-	return found_bss;
-}
-
-/**
- *  @brief This function finds the best SSID in the Scan List
- *
- *  Search the scan table for the best SSID that also matches the current
- *   adapter network preference (infrastructure or adhoc)
- *
- *  @param priv  A pointer to struct lbs_private
- *
- *  @return         index in BSSID list
- */
-static struct bss_descriptor *lbs_find_best_ssid_in_list(struct lbs_private *priv,
-							 uint8_t mode)
-{
-	uint8_t bestrssi = 0;
-	struct bss_descriptor *iter_bss;
-	struct bss_descriptor *best_bss = NULL;
-
-	lbs_deb_enter(LBS_DEB_SCAN);
-
-	mutex_lock(&priv->lock);
-
-	list_for_each_entry (iter_bss, &priv->network_list, list) {
-		switch (mode) {
-		case IW_MODE_INFRA:
-		case IW_MODE_ADHOC:
-			if (!is_network_compatible(priv, iter_bss, mode))
-				break;
-			if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
-				break;
-			bestrssi = SCAN_RSSI(iter_bss->rssi);
-			best_bss = iter_bss;
-			break;
-		case IW_MODE_AUTO:
-		default:
-			if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
-				break;
-			bestrssi = SCAN_RSSI(iter_bss->rssi);
-			best_bss = iter_bss;
-			break;
-		}
-	}
-
-	mutex_unlock(&priv->lock);
-	lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss);
-	return best_bss;
-}
-
-/**
- *  @brief Find the best AP
- *
- *  Used from association worker.
- *
- *  @param priv         A pointer to struct lbs_private structure
- *  @param pSSID        A pointer to AP's ssid
- *
- *  @return             0--success, otherwise--fail
- */
-int lbs_find_best_network_ssid(struct lbs_private *priv, uint8_t *out_ssid,
-			       uint8_t *out_ssid_len, uint8_t preferred_mode,
-			       uint8_t *out_mode)
-{
-	int ret = -1;
-	struct bss_descriptor *found;
-
-	lbs_deb_enter(LBS_DEB_SCAN);
-
-	priv->scan_ssid_len = 0;
-	lbs_scan_networks(priv, 1);
-	if (priv->surpriseremoved)
-		goto out;
-
-	found = lbs_find_best_ssid_in_list(priv, preferred_mode);
-	if (found && (found->ssid_len > 0)) {
-		memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE);
-		*out_ssid_len = found->ssid_len;
-		*out_mode = found->mode;
-		ret = 0;
-	}
-
-out:
-	lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
-	return ret;
-}
-
-
 /**
  *  @brief Send a scan command for all available channels filtered on a spec
  *

drivers/net/wireless/libertas/scan.h

@@ -7,73 +7,13 @@
 #ifndef _LBS_SCAN_H
 #define _LBS_SCAN_H
 
-#include <net/ieee80211.h>
-#include "hostcmd.h"
-
 /**
  *  @brief Maximum number of channels that can be sent in a setuserscan ioctl
  */
 #define LBS_IOCTL_USER_SCAN_CHAN_MAX  50
 
-//! Infrastructure BSS scan type in cmd_ds_802_11_scan
-#define LBS_SCAN_BSS_TYPE_BSS         1
-
-//! Adhoc BSS scan type in cmd_ds_802_11_scan
-#define LBS_SCAN_BSS_TYPE_IBSS        2
-
-//! Adhoc or Infrastructure BSS scan type in cmd_ds_802_11_scan, no filter
-#define LBS_SCAN_BSS_TYPE_ANY         3
-
-/**
- *  @brief Structure used to store information for each beacon/probe response
- */
-struct bss_descriptor {
-	u8 bssid[ETH_ALEN];
-
-	u8 ssid[IW_ESSID_MAX_SIZE + 1];
-	u8 ssid_len;
-
-	u16 capability;
-	u32 rssi;
-	u32 channel;
-	u16 beaconperiod;
-	u32 atimwindow;
-
-	/* IW_MODE_AUTO, IW_MODE_ADHOC, IW_MODE_INFRA */
-	u8 mode;
-
-	/* zero-terminated array of supported data rates */
-	u8 rates[MAX_RATES + 1];
-
-	unsigned long last_scanned;
-
-	union ieeetypes_phyparamset phyparamset;
-	union IEEEtypes_ssparamset ssparamset;
-
-	struct ieeetypes_countryinfofullset countryinfo;
-
-	u8 wpa_ie[MAX_WPA_IE_LEN];
-	size_t wpa_ie_len;
-	u8 rsn_ie[MAX_WPA_IE_LEN];
-	size_t rsn_ie_len;
-
-	u8 mesh;
-
-	struct list_head list;
-};
-
 int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len);
 
-struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv,
-		u8 *ssid, u8 ssid_len, u8 *bssid, u8 mode,
-		int channel);
-
-struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv,
-	u8 *bssid, u8 mode);
-
-int lbs_find_best_network_ssid(struct lbs_private *priv, u8 *out_ssid,
-			u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode);
-
 int lbs_send_specific_ssid_scan(struct lbs_private *priv, u8 *ssid,
 				u8 ssid_len);
 
@@ -82,6 +22,8 @@ int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
 int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
 			 union iwreq_data *wrqu, char *extra);
 
+int lbs_scan_networks(struct lbs_private *priv, int full_scan);
+
 void lbs_scan_worker(struct work_struct *work);
 
 #endif

drivers/net/wireless/libertas/wext.c

@@ -17,6 +17,7 @@
 #include "defs.h"
 #include "dev.h"
 #include "wext.h"
+#include "scan.h"
 #include "assoc.h"
 #include "cmd.h"