wpa_supplicant: Initial Revision 0.8.X

Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date:   Thu Apr 21 20:41:01 2011 +0300

    Enable CONFIG_DRIVER_NL80211=y in the default configuration

    nl80211 should be preferred over WEXT with any recent Linux
    kernel version.

Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

1 files changed, 133 insertions, 0 deletions

diff --git a/wpa_supplicant/blacklist.c b/wpa_supplicant/blacklist.c
new file mode 100644
index 0000000..8f12ac9
--- /dev/null
+++ b/wpa_supplicant/blacklist.c
@@ -0,0 +1,133 @@
+/*
+ * wpa_supplicant - Temporary BSSID blacklist
+ * Copyright (c) 2003-2007, 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 "includes.h"
+
+#include "common.h"
+#include "wpa_supplicant_i.h"
+#include "blacklist.h"
+
+/**
+ * wpa_blacklist_get - Get the blacklist entry for a BSSID
+ * @wpa_s: Pointer to wpa_supplicant data
+ * @bssid: BSSID
+ * Returns: Matching blacklist entry for the BSSID or %NULL if not found
+ */
+struct wpa_blacklist * wpa_blacklist_get(struct wpa_supplicant *wpa_s,
+					 const u8 *bssid)
+{
+	struct wpa_blacklist *e;
+
+	e = wpa_s->blacklist;
+	while (e) {
+		if (os_memcmp(e->bssid, bssid, ETH_ALEN) == 0)
+			return e;
+		e = e->next;
+	}
+
+	return NULL;
+}
+
+
+/**
+ * wpa_blacklist_add - Add an BSSID to the blacklist
+ * @wpa_s: Pointer to wpa_supplicant data
+ * @bssid: BSSID to be added to the blacklist
+ * Returns: Current blacklist count on success, -1 on failure
+ *
+ * This function adds the specified BSSID to the blacklist or increases the
+ * blacklist count if the BSSID was already listed. It should be called when
+ * an association attempt fails either due to the selected BSS rejecting
+ * association or due to timeout.
+ *
+ * This blacklist is used to force %wpa_supplicant to go through all available
+ * BSSes before retrying to associate with an BSS that rejected or timed out
+ * association. It does not prevent the listed BSS from being used; it only
+ * changes the order in which they are tried.
+ */
+int wpa_blacklist_add(struct wpa_supplicant *wpa_s, const u8 *bssid)
+{
+	struct wpa_blacklist *e;
+
+	e = wpa_blacklist_get(wpa_s, bssid);
+	if (e) {
+		e->count++;
+		wpa_printf(MSG_DEBUG, "BSSID " MACSTR " blacklist count "
+			   "incremented to %d",
+			   MAC2STR(bssid), e->count);
+		return e->count;
+	}
+
+	e = os_zalloc(sizeof(*e));
+	if (e == NULL)
+		return -1;
+	os_memcpy(e->bssid, bssid, ETH_ALEN);
+	e->count = 1;
+	e->next = wpa_s->blacklist;
+	wpa_s->blacklist = e;
+	wpa_printf(MSG_DEBUG, "Added BSSID " MACSTR " into blacklist",
+		   MAC2STR(bssid));
+
+	return e->count;
+}
+
+
+/**
+ * wpa_blacklist_del - Remove an BSSID from the blacklist
+ * @wpa_s: Pointer to wpa_supplicant data
+ * @bssid: BSSID to be removed from the blacklist
+ * Returns: 0 on success, -1 on failure
+ */
+int wpa_blacklist_del(struct wpa_supplicant *wpa_s, const u8 *bssid)
+{
+	struct wpa_blacklist *e, *prev = NULL;
+
+	e = wpa_s->blacklist;
+	while (e) {
+		if (os_memcmp(e->bssid, bssid, ETH_ALEN) == 0) {
+			if (prev == NULL) {
+				wpa_s->blacklist = e->next;
+			} else {
+				prev->next = e->next;
+			}
+			wpa_printf(MSG_DEBUG, "Removed BSSID " MACSTR " from "
+				   "blacklist", MAC2STR(bssid));
+			os_free(e);
+			return 0;
+		}
+		prev = e;
+		e = e->next;
+	}
+	return -1;
+}
+
+
+/**
+ * wpa_blacklist_clear - Clear the blacklist of all entries
+ * @wpa_s: Pointer to wpa_supplicant data
+ */
+void wpa_blacklist_clear(struct wpa_supplicant *wpa_s)
+{
+	struct wpa_blacklist *e, *prev;
+
+	e = wpa_s->blacklist;
+	wpa_s->blacklist = NULL;
+	while (e) {
+		prev = e;
+		e = e->next;
+		wpa_printf(MSG_DEBUG, "Removed BSSID " MACSTR " from "
+			   "blacklist (clear)", MAC2STR(prev->bssid));
+		os_free(prev);
+	}
+}