Add parameter checking and error reporting to wpa_blacklist API

Signed-off-by: Sasha Levitskiy <sanek@google.com>

diff --git a/wpa_supplicant/blacklist.c b/wpa_supplicant/blacklist.c
index fa8014c..2e01e7f 100644 (file)
--- a/wpa_supplicant/blacklist.c
+++ b/wpa_supplicant/blacklist.c
@@ -23,6 +23,9 @@ struct wpa_blacklist * wpa_blacklist_get(struct wpa_supplicant *wpa_s,
 {
        struct wpa_blacklist *e;
 
+       if (wpa_s == NULL || bssid == NULL)
+               return NULL;
+
        e = wpa_s->blacklist;
        while (e) {
                if (os_memcmp(e->bssid, bssid, ETH_ALEN) == 0)
@@ -54,6 +57,9 @@ int wpa_blacklist_add(struct wpa_supplicant *wpa_s, const u8 *bssid)
 {
        struct wpa_blacklist *e;
 
+       if (wpa_s == NULL || bssid == NULL)
+               return -1;
+
        e = wpa_blacklist_get(wpa_s, bssid);
        if (e) {
                e->count++;
@@ -87,6 +93,9 @@ int wpa_blacklist_del(struct wpa_supplicant *wpa_s, const u8 *bssid)
 {
        struct wpa_blacklist *e, *prev = NULL;
 
+       if (wpa_s == NULL || bssid == NULL)
+               return -1;
+
        e = wpa_s->blacklist;
        while (e) {
                if (os_memcmp(e->bssid, bssid, ETH_ALEN) == 0) {