hostapd: Process MAC ACLs on a station association event (SME in driver)

Now hostapd will use station MAC-based permissions according to the
macaddr_acl policy also for drivers which use AP SME offload, but do not
support NL80211_CMD_SET_MAC_ACL for offloading MAC ACL processing. It
should be noted that in this type of case the association goes through
and the station gets disconnected immediately after that.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/ap/drv_callbacks.c

@@ -22,6 +22,7 @@
 #include "wnm_ap.h"
 #include "hostapd.h"
 #include "ieee802_11.h"
+#include "ieee802_11_auth.h"
 #include "sta_info.h"
 #include "accounting.h"
 #include "tkip_countermeasures.h"
@@ -114,6 +115,14 @@ int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
 	}
 	sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
 
+	res = hostapd_check_acl(hapd, addr, NULL);
+	if (res != HOSTAPD_ACL_ACCEPT) {
+		wpa_printf(MSG_INFO, "STA " MACSTR " not allowed to connect",
+			   MAC2STR(addr));
+		reason = WLAN_REASON_UNSPECIFIED;
+		goto fail;
+	}
+
 #ifdef CONFIG_P2P
 	if (elems.p2p) {
 		wpabuf_free(sta->p2p_ie);

src/ap/ieee802_11_auth.c

@@ -212,6 +212,32 @@ static int hostapd_radius_acl_query(struct hostapd_data *hapd, const u8 *addr,
 #endif /* CONFIG_NO_RADIUS */
 
 
+/**
+ * hostapd_check_acl - Check a specified STA against accept/deny ACLs
+ * @hapd: hostapd BSS data
+ * @addr: MAC address of the STA
+ * @vlan_id: Buffer for returning VLAN ID
+ * Returns: HOSTAPD_ACL_ACCEPT, HOSTAPD_ACL_REJECT, or HOSTAPD_ACL_PENDING
+ */
+ int hostapd_check_acl(struct hostapd_data *hapd, const u8 *addr, int *vlan_id)
+{
+	if (hostapd_maclist_found(hapd->conf->accept_mac,
+				  hapd->conf->num_accept_mac, addr, vlan_id))
+		return HOSTAPD_ACL_ACCEPT;
+
+	if (hostapd_maclist_found(hapd->conf->deny_mac,
+				  hapd->conf->num_deny_mac, addr, vlan_id))
+		return HOSTAPD_ACL_REJECT;
+
+	if (hapd->conf->macaddr_acl == ACCEPT_UNLESS_DENIED)
+		return HOSTAPD_ACL_ACCEPT;
+	if (hapd->conf->macaddr_acl == DENY_UNLESS_ACCEPTED)
+		return HOSTAPD_ACL_REJECT;
+
+	return HOSTAPD_ACL_PENDING;
+}
+
+
 /**
  * hostapd_allowed_address - Check whether a specified STA can be authenticated
  * @hapd: hostapd BSS data
@@ -235,6 +261,8 @@ int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr,
 			    struct hostapd_sta_wpa_psk_short **psk,
 			    char **identity, char **radius_cui)
 {
+	int res;
+
 	if (session_timeout)
 		*session_timeout = 0;
 	if (acct_interim_interval)
@@ -248,18 +276,9 @@ int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr,
 	if (radius_cui)
 		*radius_cui = NULL;
 
-	if (hostapd_maclist_found(hapd->conf->accept_mac,
-				  hapd->conf->num_accept_mac, addr, vlan_id))
-		return HOSTAPD_ACL_ACCEPT;
-
-	if (hostapd_maclist_found(hapd->conf->deny_mac,
-				  hapd->conf->num_deny_mac, addr, vlan_id))
-		return HOSTAPD_ACL_REJECT;
-
-	if (hapd->conf->macaddr_acl == ACCEPT_UNLESS_DENIED)
-		return HOSTAPD_ACL_ACCEPT;
-	if (hapd->conf->macaddr_acl == DENY_UNLESS_ACCEPTED)
-		return HOSTAPD_ACL_REJECT;
+	res = hostapd_check_acl(hapd, addr, vlan_id);
+	if (res != HOSTAPD_ACL_PENDING)
+		return res;
 
 	if (hapd->conf->macaddr_acl == USE_EXTERNAL_RADIUS_AUTH) {
 #ifdef CONFIG_NO_RADIUS
@@ -268,10 +287,9 @@ int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr,
 		struct hostapd_acl_query_data *query;
 
 		/* Check whether ACL cache has an entry for this station */
-		int res = hostapd_acl_cache_get(hapd, addr, session_timeout,
-						acct_interim_interval,
-						vlan_id, psk,
-						identity, radius_cui);
+		res = hostapd_acl_cache_get(hapd, addr, session_timeout,
+					    acct_interim_interval, vlan_id, psk,
+					    identity, radius_cui);
 		if (res == HOSTAPD_ACL_ACCEPT ||
 		    res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
 			return res;

src/ap/ieee802_11_auth.h

@@ -16,6 +16,7 @@ enum {
 	HOSTAPD_ACL_ACCEPT_TIMEOUT = 3
 };
 
+int hostapd_check_acl(struct hostapd_data *hapd, const u8 *addr, int *vlan_id);
 int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr,
 			    const u8 *msg, size_t len, u32 *session_timeout,
 			    u32 *acct_interim_interval, int *vlan_id,