+always_inline session_t *
+listen_session_alloc (u8 thread_index, session_type_t type)
+{
+ session_t *s;
+ s = session_alloc (thread_index);
+ s->session_type = type;
+ s->session_state = SESSION_STATE_LISTENING;
+ return s;
+}
+
+always_inline session_t *
+listen_session_get (u32 ls_index)
+{
+ return session_get (ls_index, 0);
+}
+
+always_inline void
+listen_session_free (session_t * s)
+{
+ ASSERT (!s->rx_fifo);
+ session_free (s);
+}
+
+transport_connection_t *listen_session_get_transport (session_t * s);
+
+/*
+ * Session layer functions
+ */
+
+always_inline session_main_t *
+vnet_get_session_main ()
+{
+ return &session_main;
+}
+
+always_inline session_worker_t *
+session_main_get_worker (u32 thread_index)
+{
+ return &session_main.wrk[thread_index];
+}
+
+static inline session_worker_t *
+session_main_get_worker_if_valid (u32 thread_index)
+{
+ if (thread_index > vec_len (session_main.wrk))
+ return 0;
+ return &session_main.wrk[thread_index];
+}
+
+always_inline svm_msg_q_t *
+session_main_get_vpp_event_queue (u32 thread_index)
+{
+ return session_main.wrk[thread_index].vpp_event_queue;
+}
+
+always_inline u8
+session_main_is_enabled ()
+{
+ return session_main.is_enabled == 1;
+}
+
+#define session_cli_return_if_not_enabled() \
+do { \
+ if (!session_main.is_enabled) \
+ return clib_error_return (0, "session layer is not enabled"); \
+} while (0)
+
+int session_main_flush_enqueue_events (u8 proto, u32 thread_index);
+int session_main_flush_all_enqueue_events (u8 transport_proto);
+void session_queue_run_on_main_thread (vlib_main_t * vm);
+
+/**
+ * Add session node pending buffer with custom node
+ *
+ * @param thread_index worker thread expected to send the buffer
+ * @param bi buffer index
+ * @param next_node next node edge index for buffer. Edge to next node
+ * must exist
+ */
+always_inline void
+session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
+{
+ session_worker_t *wrk = session_main_get_worker (thread_index);
+ vec_add1 (wrk->pending_tx_buffers, bi);
+ vec_add1 (wrk->pending_tx_nexts, next_node);
+}
+
+ssvm_private_t *session_main_get_evt_q_segment (void);
+void session_node_enable_disable (u8 is_en);