+always_inline clib_error_t *
+vl_api_send_fd_msg (vl_api_registration_t * reg, int fds[], int n_fds)
+{
+ clib_file_t *cf = vl_api_registration_file (reg);
+ if (cf)
+ return vl_sock_api_send_fd_msg (cf->file_descriptor, fds, n_fds);
+ return 0;
+}
+
+always_inline clib_error_t *
+vl_api_recv_fd_msg (vl_api_registration_t * reg, int fds[], int n_fds,
+ u32 wait)
+{
+ clib_file_t *cf = vl_api_registration_file (reg);
+ if (cf)
+ return vl_sock_api_recv_fd_msg (cf->file_descriptor, fds, n_fds, wait);
+ return 0;
+}
+
+/*
+ * vl_api_clnt process data used by transports (socket api in particular)
+ */
+extern vlib_node_registration_t vl_api_clnt_node;
+extern volatile int **vl_api_queue_cursizes;
+
+typedef enum vl_api_clnt_process_events
+{
+ QUEUE_SIGNAL_EVENT = 1,
+ SOCKET_READ_EVENT
+} vl_api_clnt_process_events_t;
+
+#define foreach_histogram_bucket \
+_(400) \
+_(200) \
+_(100) \
+_(10)
+
+typedef enum
+{
+#define _(n) SLEEP_##n##_US,
+ foreach_histogram_bucket
+#undef _
+ SLEEP_N_BUCKETS,
+} histogram_index_t;
+
+extern u64 vector_rate_histogram[];
+
+/*
+ * sockclnt APIs XXX are these actually used anywhere?
+ */
+vl_api_registration_t *sockclnt_get_registration (u32 index);
+void socksvr_add_pending_output (struct clib_file *uf,
+ struct vl_api_registration_ *cf,
+ u8 * buffer, uword buffer_bytes);
+void vl_socket_process_msg (struct clib_file *uf,
+ struct vl_api_registration_ *rp, i8 * input_v);
+u32 sockclnt_open_index (char *client_name, char *hostname, int port);
+void sockclnt_close_index (u32 index);
+void vl_client_msg_api_send (vl_api_registration_t * cm, u8 * elem);