wireguard: fix udp-port registration

[vpp.git] / src / plugins / wireguard / wireguard_if.c

diff --git a/src/plugins/wireguard/wireguard_if.c b/src/plugins/wireguard/wireguard_if.c
index 46abdf6..3c59407 100644 (file)
--- a/src/plugins/wireguard/wireguard_if.c
+++ b/src/plugins/wireguard/wireguard_if.c
@@ -250,6 +250,13 @@ wg_if_create (u32 user_instance,
 
   *sw_if_indexp = (u32) ~ 0;
 
+  /*
+   * Check if the required port is already in use
+   */
+  udp_dst_port_info_t *pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4);
+  if (pi)
+    return VNET_API_ERROR_UDP_PORT_TAKEN;
+
   /*
    * Allocate a wg_if instance. Either select on dynamically
    * or try to use the desired user_instance number.