wlantest: Maintain table of BSS information

Whenever a Beacon or Probe Response frame is observed, add or update
a BSS entry to maintain current information about the active BSSes.

1 files changed, 48 insertions, 0 deletions

diff --git a/wlantest/bss.c b/wlantest/bss.c
new file mode 100644
index 0000000..11b9248
--- /dev/null
+++ b/wlantest/bss.c
@@ -0,0 +1,48 @@
+/*
+ * BSS list
+ * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "wlantest.h"
+
+
+struct wlantest_bss * bss_get(struct wlantest *wt, const u8 *bssid)
+{
+	struct wlantest_bss *bss;
+
+	if (bssid[0] & 0x01)
+		return NULL; /* Skip group addressed frames */
+
+	dl_list_for_each(bss, &wt->bss, struct wlantest_bss, list) {
+		if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
+			return bss;
+	}
+
+	bss = os_zalloc(sizeof(*bss));
+	if (bss == NULL)
+		return NULL;
+	os_memcpy(bss->bssid, bssid, ETH_ALEN);
+	dl_list_add(&wt->bss, &bss->list);
+	wpa_printf(MSG_DEBUG, "Discovered new BSS - " MACSTR,
+		   MAC2STR(bss->bssid));
+	return bss;
+}
+
+
+void bss_deinit(struct wlantest_bss *bss)
+{
+	dl_list_del(&bss->list);
+	os_free(bss);
+}