[PATCH] libertas: make association paths consistent

The BSS to associate with (in either Infrastructure or IBSS join
operations) is now stored in _one_ place in the association request (the
bss member), not two places as before (pattemptedbss and
curbssparams->bssdescriptor).

Association requests are passed to the necessary association functions
to (a) give them access to the bss member and (b) ensure that
association/join/start setup uses settings from the request, not the
current adapter settings (which may not be valid for the requested
settings).

Because the 'bss' member of the association request is used now, the
command return functions from associate and adhoc join/start need access
to the in-progress association request to update curbssparams when
everything is done.  The association worker moves the request from
pending to in-progress for the duration of the association attempt.
Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/11d.c

@@ -654,7 +654,8 @@ int libertas_ret_802_11d_domain_info(wlan_private * priv,
  *  @param priv    pointer to wlan_private
  *  @return 	   0; -1
  */
-int libertas_parse_dnld_countryinfo_11d(wlan_private * priv)
+int libertas_parse_dnld_countryinfo_11d(wlan_private * priv,
+                                        struct bss_descriptor * bss)
 {
 	int ret;
 	wlan_adapter *adapter = priv->adapter;
@@ -663,8 +664,7 @@ int libertas_parse_dnld_countryinfo_11d(wlan_private * priv)
 	if (priv->adapter->enable11d) {
 		memset(&adapter->parsed_region_chan, 0,
 		       sizeof(struct parsed_region_chan_11d));
-		ret = parse_domain_info_11d(&adapter->pattemptedbssdesc->
-					       countryinfo, 0,
+		ret = parse_domain_info_11d(&bss->countryinfo, 0,
 					       &adapter->parsed_region_chan);
 
 		if (ret == -1) {

drivers/net/wireless/libertas/11d.h

@@ -98,7 +98,9 @@ int libertas_cmd_enable_11d(wlan_private * priv, struct iwreq *wrq);
 int libertas_ret_802_11d_domain_info(wlan_private * priv,
 				 struct cmd_ds_command *resp);
 
-int libertas_parse_dnld_countryinfo_11d(wlan_private * priv);
+struct bss_descriptor;
+int libertas_parse_dnld_countryinfo_11d(wlan_private * priv,
+                                        struct bss_descriptor * bss);
 
 int libertas_create_dnld_countryinfo_11d(wlan_private * priv);
 

drivers/net/wireless/libertas/assoc.c

@@ -13,6 +13,56 @@
 static const u8 bssid_any[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 static const u8 bssid_off[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
+/* From ieee80211_module.c */
+static const char *libertas_escape_essid(const char *essid, u8 essid_len)
+{
+	static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
+	const char *s = essid;
+	char *d = escaped;
+
+	if (ieee80211_is_empty_essid(essid, essid_len))
+		return "";
+
+	essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
+	while (essid_len--) {
+		if (*s == '\0') {
+			*d++ = '\\';
+			*d++ = '0';
+			s++;
+		} else {
+			*d++ = *s++;
+		}
+	}
+	*d = '\0';
+	return escaped;
+}
+
+static void print_assoc_req(const char * extra, struct assoc_request * assoc_req)
+{
+	lbs_deb_assoc(
+	       "#### Association Request: %s\n"
+	       "       flags:      0x%08lX\n"
+	       "       SSID:       '%s'\n"
+	       "       channel:    %d\n"
+	       "       band:       %d\n"
+	       "       mode:       %d\n"
+	       "       BSSID:      " MAC_FMT "\n"
+	       "       WPA:        %d\n"
+	       "       WPA2:       %d\n"
+	       "       WEP status: %d\n"
+	       "       auth:       %d\n"
+	       "       auth_alg:   %d\n"
+	       "       encmode:    %d\n",
+	       extra, assoc_req->flags,
+	       libertas_escape_essid(assoc_req->ssid.ssid, assoc_req->ssid.ssidlength),
+	       assoc_req->channel, assoc_req->band, assoc_req->mode,
+	       MAC_ARG(assoc_req->bssid), assoc_req->secinfo.WPAenabled,
+	       assoc_req->secinfo.WPA2enabled, assoc_req->secinfo.WEPstatus,
+	       assoc_req->secinfo.authmode, assoc_req->secinfo.auth1xalg,
+	       assoc_req->secinfo.Encryptionmode);
+}
+
+
 static int assoc_helper_essid(wlan_private *priv,
                               struct assoc_request * assoc_req)
 {
@@ -36,10 +86,8 @@ static int assoc_helper_essid(wlan_private *priv,
 				NULL, IW_MODE_INFRA);
 		if (bss != NULL) {
 			lbs_deb_assoc("SSID found in scan list, associating\n");
-			ret = wlan_associate(priv, bss);
-			if (ret == 0) {
-				memcpy(&assoc_req->bssid, bss->bssid, ETH_ALEN);
-			}
+			memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
+			ret = wlan_associate(priv, assoc_req);
 		} else {
 			lbs_deb_assoc("SSID '%s' not found; cannot associate\n",
 				assoc_req->ssid.ssid);
@@ -55,14 +103,16 @@ static int assoc_helper_essid(wlan_private *priv,
 				IW_MODE_ADHOC);
 		if (bss != NULL) {
 			lbs_deb_assoc("SSID found joining\n");
-			libertas_join_adhoc_network(priv, bss);
+			memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
+			libertas_join_adhoc_network(priv, assoc_req);
 		} else {
 			/* else send START command */
 			lbs_deb_assoc("SSID not found in list, so creating adhoc"
 				" with SSID '%s'\n", assoc_req->ssid.ssid);
-			libertas_start_adhoc_network(priv, &assoc_req->ssid);
+			memcpy(&assoc_req->bss.ssid, &assoc_req->ssid,
+				sizeof(struct WLAN_802_11_SSID));
+			libertas_start_adhoc_network(priv, assoc_req);
 		}
-		memcpy(&assoc_req->bssid, &adapter->current_addr, ETH_ALEN);
 	}
 
 	lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
@@ -89,13 +139,13 @@ static int assoc_helper_bssid(wlan_private *priv,
 		goto out;
 	}
 
+	memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
 	if (assoc_req->mode == IW_MODE_INFRA) {
-		ret = wlan_associate(priv, bss);
+		ret = wlan_associate(priv, assoc_req);
 		lbs_deb_assoc("ASSOC: wlan_associate(bssid) returned %d\n", ret);
 	} else if (assoc_req->mode == IW_MODE_ADHOC) {
-		libertas_join_adhoc_network(priv, bss);
+		libertas_join_adhoc_network(priv, assoc_req);
 	}
-	memcpy(&assoc_req->ssid, &bss->ssid, sizeof(struct WLAN_802_11_SSID));
 
 out:
 	lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
@@ -421,15 +471,15 @@ void libertas_association_worker(struct work_struct *work)
 	lbs_deb_enter(LBS_DEB_ASSOC);
 
 	mutex_lock(&adapter->lock);
-	assoc_req = adapter->assoc_req;
-	adapter->assoc_req = NULL;
+	assoc_req = adapter->pending_assoc_req;
+	adapter->pending_assoc_req = NULL;
+	adapter->in_progress_assoc_req = assoc_req;
 	mutex_unlock(&adapter->lock);
 
 	if (!assoc_req)
 		goto done;
 
-	lbs_deb_assoc("ASSOC: starting new association request: flags = 0x%lX\n",
-		assoc_req->flags);
+	print_assoc_req(__func__, assoc_req);
 
 	/* If 'any' SSID was specified, find an SSID to associate with */
 	if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
@@ -561,7 +611,9 @@ lbs_deb_assoc("ASSOC(:%d) wpa_keys: ret = %d\n", __LINE__, ret);
 		if (success) {
 			lbs_deb_assoc("ASSOC: association attempt successful. "
 				"Associated to '%s' (" MAC_FMT ")\n",
-				assoc_req->ssid.ssid, MAC_ARG(assoc_req->bssid));
+				libertas_escape_essid(adapter->curbssparams.ssid.ssid,
+				             adapter->curbssparams.ssid.ssidlength),
+				MAC_ARG(adapter->curbssparams.bssid));
 			libertas_prepare_and_send_command(priv,
 				cmd_802_11_rssi,
 				0, cmd_option_waitforrsp, 0, NULL);
@@ -580,6 +632,10 @@ out:
 		lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
 			ret);
 	}
+
+	mutex_lock(&adapter->lock);
+	adapter->in_progress_assoc_req = NULL;
+	mutex_unlock(&adapter->lock);
 	kfree(assoc_req);
 
 done:
@@ -594,9 +650,10 @@ struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
 {
 	struct assoc_request * assoc_req;
 
-	if (!adapter->assoc_req) {
-		adapter->assoc_req = kzalloc(sizeof(struct assoc_request), GFP_KERNEL);
-		if (!adapter->assoc_req) {
+	if (!adapter->pending_assoc_req) {
+		adapter->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
+		                                     GFP_KERNEL);
+		if (!adapter->pending_assoc_req) {
 			lbs_pr_info("Not enough memory to allocate association"
 				" request!\n");
 			return NULL;
@@ -606,15 +663,18 @@ struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
 	/* Copy current configuration attributes to the association request,
 	 * but don't overwrite any that are already set.
 	 */
-	assoc_req = adapter->assoc_req;
+	assoc_req = adapter->pending_assoc_req;
 	if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
-		memcpy(&assoc_req->ssid, adapter->curbssparams.ssid.ssid,
-			adapter->curbssparams.ssid.ssidlength);
+		memcpy(&assoc_req->ssid, &adapter->curbssparams.ssid,
+		       sizeof(struct WLAN_802_11_SSID));
 	}
 
 	if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
 		assoc_req->channel = adapter->curbssparams.channel;
 
+	if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
+		assoc_req->band = adapter->curbssparams.band;
+
 	if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
 		assoc_req->mode = adapter->mode;
 
@@ -655,7 +715,7 @@ struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
 		assoc_req->wpa_ie_len = adapter->wpa_ie_len;
 	}
 
+	print_assoc_req(__func__, assoc_req);
+
 	return assoc_req;
 }
-
-

drivers/net/wireless/libertas/assoc.h

@@ -21,9 +21,9 @@ static inline void wlan_postpone_association_work(wlan_private *priv)
 static inline void wlan_cancel_association_work(wlan_private *priv)
 {
 	cancel_delayed_work(&priv->assoc_work);
-	if (priv->adapter->assoc_req) {
-		kfree(priv->adapter->assoc_req);
-		priv->adapter->assoc_req = NULL;
+	if (priv->adapter->pending_assoc_req) {
+		kfree(priv->adapter->pending_assoc_req);
+		priv->adapter->pending_assoc_req = NULL;
 	}
 }
 

drivers/net/wireless/libertas/cmdresp.c

@@ -67,25 +67,19 @@ void libertas_mac_event_disconnected(wlan_private * priv)
 	lbs_deb_cmd("Previous SSID=%s, ssid length=%u\n",
 	       adapter->previousssid.ssid, adapter->previousssid.ssidlength);
 
-	/* reset internal flags */
-	adapter->secinfo.WPAenabled = 0;
-	adapter->secinfo.WPA2enabled = 0;
-	adapter->wpa_ie_len = 0;
-
 	adapter->connect_status = libertas_disconnected;
 
-	/*
-	 * memorize the previous SSID and BSSID
-	 * it could be used for re-assoc
-	 */
+	/* Save previous SSID and BSSID for possible reassociation */
 	memcpy(&adapter->previousssid,
 	       &adapter->curbssparams.ssid, sizeof(struct WLAN_802_11_SSID));
 	memcpy(adapter->previousbssid,
 	       adapter->curbssparams.bssid, ETH_ALEN);
 
-	/* need to erase the current SSID and BSSID info */
-	adapter->pattemptedbssdesc = NULL;
-	memset(&adapter->curbssparams, 0, sizeof(adapter->curbssparams));
+	/* Clear out associated SSID and BSSID since connection is
+	 * no longer valid.
+	 */
+	memset(&adapter->curbssparams.bssid, 0, ETH_ALEN);
+	memset(&adapter->curbssparams.ssid, 0, sizeof(struct WLAN_802_11_SSID));
 
 	if (adapter->psstate != PS_STATE_FULL_POWER) {
 		/* make firmware to exit PS mode */

drivers/net/wireless/libertas/dev.h

@@ -63,7 +63,6 @@ struct wlan_802_11_security {
 
 /** Current Basic Service Set State Structure */
 struct current_bss_params {
-	struct bss_descriptor bssdescriptor;
 	/** bssid */
 	u8 bssid[ETH_ALEN];
 	/** ssid */
@@ -168,18 +167,20 @@ struct _wlan_private {
 struct assoc_request {
 #define ASSOC_FLAG_SSID			1
 #define ASSOC_FLAG_CHANNEL		2
-#define ASSOC_FLAG_MODE			3
-#define ASSOC_FLAG_BSSID		4
-#define ASSOC_FLAG_WEP_KEYS		5
-#define ASSOC_FLAG_WEP_TX_KEYIDX	6
-#define ASSOC_FLAG_WPA_MCAST_KEY	7
-#define ASSOC_FLAG_WPA_UCAST_KEY	8
-#define ASSOC_FLAG_SECINFO		9
-#define ASSOC_FLAG_WPA_IE		10
+#define ASSOC_FLAG_BAND			3
+#define ASSOC_FLAG_MODE			4
+#define ASSOC_FLAG_BSSID		5
+#define ASSOC_FLAG_WEP_KEYS		6
+#define ASSOC_FLAG_WEP_TX_KEYIDX	7
+#define ASSOC_FLAG_WPA_MCAST_KEY	8
+#define ASSOC_FLAG_WPA_UCAST_KEY	9
+#define ASSOC_FLAG_SECINFO		10
+#define ASSOC_FLAG_WPA_IE		11
 	unsigned long flags;
 
 	struct WLAN_802_11_SSID ssid;
 	u8 channel;
+	u8 band;
 	u8 mode;
 	u8 bssid[ETH_ALEN];
 
@@ -196,6 +197,9 @@ struct assoc_request {
 	/** WPA Information Elements*/
 	u8 wpa_ie[MAX_WPA_IE_LEN];
 	u8 wpa_ie_len;
+
+	/* BSS to associate with for infrastructure of Ad-Hoc join */
+	struct bss_descriptor bss;
 };
 
 /** Wlan adapter data structure*/
@@ -252,8 +256,6 @@ struct _wlan_adapter {
 	/* IW_MODE_* */
 	u8 mode;
 
-	struct bss_descriptor *pattemptedbssdesc;
-
 	struct WLAN_802_11_SSID previousssid;
 	u8 previousbssid[ETH_ALEN];
 
@@ -322,7 +324,8 @@ struct _wlan_adapter {
 	u16 locallisteninterval;
 	u16 nullpktinterval;
 
-	struct assoc_request * assoc_req;
+	struct assoc_request * pending_assoc_req;
+	struct assoc_request * in_progress_assoc_req;
 
 	/** Encryption parameter */
 	struct wlan_802_11_security secinfo;

drivers/net/wireless/libertas/fw.c

@@ -185,7 +185,8 @@ static void wlan_init_adapter(wlan_private * priv)
 	adapter->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
 	adapter->mode = IW_MODE_INFRA;
 
-	adapter->assoc_req = NULL;
+	adapter->pending_assoc_req = NULL;
+	adapter->in_progress_assoc_req = NULL;
 
 	/* Initialize scan result lists */
 	INIT_LIST_HEAD(&adapter->network_free_list);
@@ -195,7 +196,6 @@ static void wlan_init_adapter(wlan_private * priv)
 			      &adapter->network_free_list);
 	}
 
-	adapter->pattemptedbssdesc = NULL;
 	mutex_init(&adapter->lock);
 
 	adapter->prescan = 1;

drivers/net/wireless/libertas/join.h

@@ -9,6 +9,7 @@
 #define _WLAN_JOIN_H
 
 #include "defs.h"
+#include "dev.h"
 
 struct cmd_ds_command;
 extern int libertas_cmd_80211_authenticate(wlan_private * priv,
@@ -21,7 +22,7 @@ extern int libertas_cmd_80211_ad_hoc_stop(wlan_private * priv,
 				       struct cmd_ds_command *cmd);
 extern int libertas_cmd_80211_ad_hoc_start(wlan_private * priv,
 					struct cmd_ds_command *cmd,
-					void *pssid);
+					void *pdata_buf);
 extern int libertas_cmd_80211_deauthenticate(wlan_private * priv,
 					  struct cmd_ds_command *cmd);
 extern int libertas_cmd_80211_associate(wlan_private * priv,
@@ -43,8 +44,9 @@ struct WLAN_802_11_SSID;
 struct bss_descriptor;
 
 extern int libertas_start_adhoc_network(wlan_private * priv,
-			     struct WLAN_802_11_SSID *adhocssid);
-extern int libertas_join_adhoc_network(wlan_private * priv, struct bss_descriptor *pbssdesc);
+			     struct assoc_request * assoc_req);
+extern int libertas_join_adhoc_network(wlan_private * priv,
+				struct assoc_request * assoc_req);
 extern int libertas_stop_adhoc_network(wlan_private * priv);
 
 extern int libertas_send_deauthentication(wlan_private * priv);
@@ -52,6 +54,6 @@ extern int libertas_send_deauth(wlan_private * priv);
 
 extern int libertas_do_adhocstop_ioctl(wlan_private * priv);
 
-int wlan_associate(wlan_private * priv, struct bss_descriptor * pbssdesc);
+int wlan_associate(wlan_private * priv, struct assoc_request * assoc_req);
 
 #endif

drivers/net/wireless/libertas/scan.c

@@ -235,24 +235,10 @@ static void wlan_scan_process_results(wlan_private * priv)
 	wlan_adapter *adapter = priv->adapter;
 	struct bss_descriptor * iter_bss;
 
-	mutex_lock(&adapter->lock);
-
-	if (adapter->connect_status != libertas_connected)
-		goto debug_print;
-
-	/* try to find the current BSSID in the scan list */
-	list_for_each_entry (iter_bss, &adapter->network_list, list) {
-		if (libertas_SSID_cmp(&iter_bss->ssid, &adapter->curbssparams.ssid))
-			continue;
-		if (memcmp(adapter->curbssparams.bssid, iter_bss->bssid, ETH_ALEN))
-			continue;
-		/* Make a copy of current BSSID descriptor */
-		memcpy(&adapter->curbssparams.bssdescriptor, iter_bss,
-		       sizeof(struct bss_descriptor));
-		break;
-	}
+	if (adapter->connect_status == libertas_connected)
+		return;
 
-debug_print:
+	mutex_lock(&adapter->lock);
 	list_for_each_entry (iter_bss, &adapter->network_list, list) {
 		lbs_deb_scan("Scan:(%02d) " MAC_FMT ", RSSI[%03d], SSID[%s]\n",
 		       i++,
@@ -260,7 +246,6 @@ debug_print:
 		       iter_bss->bssid[3], iter_bss->bssid[4], iter_bss->bssid[5],
 		       (s32) iter_bss->rssi, iter_bss->ssid.ssid);
 	}
-
 	mutex_unlock(&adapter->lock);
 }