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-rw-r--r--src/plugins/wireguard/wireguard_if.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/plugins/wireguard/wireguard_if.c b/src/plugins/wireguard/wireguard_if.c
index 46abdf6eb4d..3c59407e3b7 100644
--- a/src/plugins/wireguard/wireguard_if.c
+++ b/src/plugins/wireguard/wireguard_if.c
@@ -251,6 +251,13 @@ 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.
*/