wpa_supplicant AP mode: Add function for enabling MAC address filtering

This can be used to allow only a specific station to associate.

wpa_supplicant/ap.c

@@ -414,3 +414,44 @@ int ap_ctrl_iface_wpa_get_status(struct wpa_supplicant *wpa_s, char *buf,
 }
 
 #endif /* CONFIG_CTRL_IFACE */
+
+
+int wpa_supplicant_ap_mac_addr_filter(struct wpa_supplicant *wpa_s,
+				      const u8 *addr)
+{
+	struct hostapd_data *hapd;
+	struct hostapd_bss_config *conf;
+
+	if (!wpa_s->ap_iface)
+		return -1;
+
+	if (addr)
+		wpa_printf(MSG_DEBUG, "AP: Set MAC address filter: " MACSTR,
+			   MAC2STR(addr));
+	else
+		wpa_printf(MSG_DEBUG, "AP: Clear MAC address filter");
+
+	hapd = wpa_s->ap_iface->bss[0];
+	conf = hapd->conf;
+
+	os_free(conf->accept_mac);
+	conf->accept_mac = NULL;
+	conf->num_accept_mac = 0;
+	os_free(conf->deny_mac);
+	conf->deny_mac = NULL;
+	conf->num_deny_mac = 0;
+
+	if (addr == NULL) {
+		conf->macaddr_acl = ACCEPT_UNLESS_DENIED;
+		return 0;
+	}
+
+	conf->macaddr_acl = DENY_UNLESS_ACCEPTED;
+	conf->accept_mac = os_zalloc(sizeof(struct mac_acl_entry));
+	if (conf->accept_mac == NULL)
+		return -1;
+	os_memcpy(conf->accept_mac[0].addr, addr, ETH_ALEN);
+	conf->num_accept_mac = 1;
+
+	return 0;
+}

wpa_supplicant/ap.h

@@ -37,5 +37,7 @@ void ap_tx_status(void *ctx, const u8 *addr,
 void ap_rx_from_unknown_sta(void *ctx, const u8 *frame, size_t len);
 void ap_mgmt_rx(void *ctx, struct rx_mgmt *rx_mgmt);
 void ap_mgmt_tx_cb(void *ctx, const u8 *buf, size_t len, u16 stype, int ok);
+int wpa_supplicant_ap_mac_addr_filter(struct wpa_supplicant *wpa_s,
+				      const u8 *addr);
 
 #endif /* AP_H */