wpa_supplicant: improve scan cache reliability

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11930 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/wpa_supplicant/patches/130-scanning.patch

@@ -1,9 +1,7 @@
 Add a scan result cache to improve roaming speed if the driver gave us a background scan before losing the connection.
 
-Index: wpa_supplicant-0.6.3/wpa_supplicant/config.h
+--- a/wpa_supplicant/config.h
-===================================================================
++++ b/wpa_supplicant/config.h
---- wpa_supplicant-0.6.3.orig/wpa_supplicant/config.h	2008-02-23 03:45:24.000000000 +0100
-+++ wpa_supplicant-0.6.3/wpa_supplicant/config.h	2008-07-10 15:08:21.000000000 +0200
 @@ -97,6 +97,12 @@
  	int ap_scan;
  
@@ -17,10 +15,8 @@ Index: wpa_supplicant-0.6.3/wpa_supplicant/config.h
  	 * ctrl_interface - Parameters for the control interface
  	 *
  	 * If this is specified, %wpa_supplicant will open a control interface
-Index: wpa_supplicant-0.6.3/wpa_supplicant/config_file.c
+--- a/wpa_supplicant/config_file.c
-===================================================================
++++ b/wpa_supplicant/config_file.c
---- wpa_supplicant-0.6.3.orig/wpa_supplicant/config_file.c	2008-02-23 03:45:24.000000000 +0100
-+++ wpa_supplicant-0.6.3/wpa_supplicant/config_file.c	2008-07-10 15:59:38.000000000 +0200
 @@ -312,6 +312,13 @@
  	return 0;
  }
@@ -54,10 +50,8 @@ Index: wpa_supplicant-0.6.3/wpa_supplicant/config_file.c
  	if (config->fast_reauth != DEFAULT_FAST_REAUTH)
  		fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
  #ifdef EAP_TLS_OPENSSL
-Index: wpa_supplicant-0.6.3/wpa_supplicant/events.c
+--- a/wpa_supplicant/events.c
-===================================================================
++++ b/wpa_supplicant/events.c
---- wpa_supplicant-0.6.3.orig/wpa_supplicant/events.c	2008-07-10 13:27:03.000000000 +0200
-+++ wpa_supplicant-0.6.3/wpa_supplicant/events.c	2008-07-10 17:18:53.000000000 +0200
 @@ -555,6 +555,9 @@
  	if (wpa_s->conf->ap_scan == 2 || wpa_s->disconnected)
  		return;
@@ -68,12 +62,20 @@ Index: wpa_supplicant-0.6.3/wpa_supplicant/events.c
  	while (selected == NULL) {
  		for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
  			selected = wpa_supplicant_select_bss(
-@@ -594,13 +597,16 @@
+@@ -567,6 +570,7 @@
+ 			wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
+ 				   "and try again");
+ 			wpa_blacklist_clear(wpa_s);
++			memset(&wpa_s->last_scan_results, 0, sizeof(wpa_s->last_scan_results));
+ 		} else if (selected == NULL) {
+ 			break;
+ 		}
+@@ -594,10 +598,12 @@
  		rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
  	} else {
  		wpa_printf(MSG_DEBUG, "No suitable AP found.");
 -		timeout = 5;
-+		timeout = 1;
++		timeout = 0;
  		goto req_scan;
  	}
  
@@ -82,10 +84,6 @@ Index: wpa_supplicant-0.6.3/wpa_supplicant/events.c
  	return;
  
  req_scan:
-+	memset(&wpa_s->last_scan_results, 0, sizeof(wpa_s->last_scan_results));
- 	if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
- 		/*
- 		 * Quick recovery if the initial scan results were not
 @@ -804,6 +810,9 @@
  	}
  	if (wpa_s->wpa_state >= WPA_ASSOCIATED)
@@ -96,10 +94,8 @@ Index: wpa_supplicant-0.6.3/wpa_supplicant/events.c
  	bssid = wpa_s->bssid;
  	if (os_memcmp(bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0)
  		bssid = wpa_s->pending_bssid;
-Index: wpa_supplicant-0.6.3/wpa_supplicant/wpa_supplicant_i.h
+--- a/wpa_supplicant/wpa_supplicant_i.h
-===================================================================
++++ b/wpa_supplicant/wpa_supplicant_i.h
---- wpa_supplicant-0.6.3.orig/wpa_supplicant/wpa_supplicant_i.h	2008-07-10 15:03:56.000000000 +0200
-+++ wpa_supplicant-0.6.3/wpa_supplicant/wpa_supplicant_i.h	2008-07-10 15:16:17.000000000 +0200
 @@ -334,6 +334,7 @@
  	struct wpa_client_mlme mlme;
  	int use_client_mlme;
@@ -116,10 +112,8 @@ Index: wpa_supplicant-0.6.3/wpa_supplicant/wpa_supplicant_i.h
  void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s);
  
  /* events.c */
-Index: wpa_supplicant-0.6.3/wpa_supplicant/scan.c
+--- a/wpa_supplicant/scan.c
-===================================================================
++++ b/wpa_supplicant/scan.c
---- wpa_supplicant-0.6.3.orig/wpa_supplicant/scan.c	2008-07-10 13:27:03.000000000 +0200
-+++ wpa_supplicant-0.6.3/wpa_supplicant/scan.c	2008-07-10 16:24:31.000000000 +0200
 @@ -40,6 +40,18 @@
  	wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
  }
@@ -151,10 +145,8 @@ Index: wpa_supplicant-0.6.3/wpa_supplicant/scan.c
  		wpa_s->scan_res_tried++;
  		wpa_printf(MSG_DEBUG, "Trying to get current scan results "
  			   "first without requesting a new scan to speed up "
-Index: wpa_supplicant-0.6.3/wpa_supplicant/wpa_supplicant.c
+--- a/wpa_supplicant/wpa_supplicant.c
-===================================================================
++++ b/wpa_supplicant/wpa_supplicant.c
---- wpa_supplicant-0.6.3.orig/wpa_supplicant/wpa_supplicant.c	2008-07-10 14:41:16.000000000 +0200
-+++ wpa_supplicant-0.6.3/wpa_supplicant/wpa_supplicant.c	2008-07-10 18:45:59.000000000 +0200
 @@ -1417,6 +1417,9 @@
  {
  	struct wpa_supplicant *wpa_s = ctx;