+ /*
+ * Connection retrieval
+ */
+ transport_connection_t *(*get_connection) (u32 conn_idx, u32 thread_idx);
+ transport_connection_t *(*get_listener) (u32 conn_index);
+ transport_connection_t *(*get_half_open) (u32 conn_index);
+
+ /*
+ * Format
+ */
+ u8 *(*format_connection) (u8 * s, va_list * args);
+ u8 *(*format_listener) (u8 * s, va_list * args);
+ u8 *(*format_half_open) (u8 * s, va_list * args);
+
+ /*
+ * Properties
+ */
+ transport_tx_fn_type_t tx_type;
+ transport_service_type_t service_type;
+} transport_proto_vft_t;
+/* *INDENT-ON* */
+
+extern transport_proto_vft_t *tp_vfts;
+
+#define transport_proto_foreach(VAR, BODY) \
+do { \
+ for (VAR = 0; VAR < vec_len (tp_vfts); VAR++) \
+ if (tp_vfts[VAR].push_header != 0) \
+ do { BODY; } while (0); \
+} while (0)
+
+int transport_connect (transport_proto_t tp, transport_endpoint_cfg_t * tep);
+void transport_close (transport_proto_t tp, u32 conn_index, u8 thread_index);
+u32 transport_start_listen (transport_proto_t tp, u32 session_index,
+ transport_endpoint_t * tep);
+u32 transport_stop_listen (transport_proto_t tp, u32 conn_index);
+void transport_cleanup (transport_proto_t tp, u32 conn_index,
+ u8 thread_index);
+
+static inline transport_connection_t *
+transport_get_connection (transport_proto_t tp, u32 conn_index,
+ u8 thread_index)
+{
+ return tp_vfts[tp].get_connection (conn_index, thread_index);
+}
+
+static inline transport_connection_t *
+transport_get_listener (transport_proto_t tp, u32 conn_index)
+{
+ return tp_vfts[tp].get_listener (conn_index);
+}
+
+static inline transport_connection_t *
+transport_get_half_open (transport_proto_t tp, u32 conn_index)
+{
+ return tp_vfts[tp].get_half_open (conn_index);
+}
+
+void transport_register_protocol (transport_proto_t transport_proto,
+ const transport_proto_vft_t * vft,
+ fib_protocol_t fib_proto, u32 output_node);
+transport_proto_vft_t *transport_protocol_get_vft (transport_proto_t tp);
+void transport_update_time (f64 time_now, u8 thread_index);
+
+int transport_alloc_local_port (u8 proto, ip46_address_t * ip);
+int transport_alloc_local_endpoint (u8 proto, transport_endpoint_cfg_t * rmt,
+ ip46_address_t * lcl_addr,
+ u16 * lcl_port);
+void transport_endpoint_cleanup (u8 proto, ip46_address_t * lcl_ip, u16 port);
+void transport_enable_disable (vlib_main_t * vm, u8 is_en);
+void transport_init (void);
+
+always_inline u32
+transport_elog_track_index (transport_connection_t * tc)
+{