[PATCH 1/2]: wpa_gui-qt4: get bssid count before iterating through scan results

[Kel Modderman]

Use the new "BSS count" ctrl interface command to determine upper limit of
how many bssid's are expected to be in the scan results.

When iterating through scan results in a loop, break when the amount of results
processed is equal to the upper limit.

Signed-off-by: Kel Modderman <kel at otaku42.de>
---
--- a/wpa_supplicant/wpa_gui-qt4/scanresults.cpp
+++ b/wpa_supplicant/wpa_gui-qt4/scanresults.cpp
@@ -56,9 +56,25 @@
 {
 	char reply[2048];
 	size_t reply_len;
+	int bss_count = 0;
+	int bss_num = 0;
     
 	scanResultsWidget->clear();
-	QString cmd("BSS first");
+
+	QString cmd("BSS count");
+
+	reply_len = sizeof(reply) - 1;
+	if (wpagui->ctrlRequest(cmd.toAscii().constData(), reply, &reply_len)
+	    >= 0) {
+		reply[reply_len] = '\0';
+		if (memcmp(reply, "FAIL", 4) != 0)
+			bss_count = atoi(reply);
+	}
+
+	if (bss_count < 1)
+		return;
+
+	cmd = "BSS first";
 
 	while (wpagui) {
 		reply_len = sizeof(reply) - 1;
@@ -104,6 +120,10 @@
 		if (bssid.isEmpty())
 			break;
 
+		bss_num++;
+		if (bss_num == bss_count)
+			break;
+
 		cmd = "BSS next ";
 		cmd.append(bssid);
 	}
---