+/**
+ * Each paraslash sender may register arbitrary many clients to the virtual
+ * streaming system, possibly with varying fec parameters. In order to do so,
+ * it must allocate a \a fec_client_parms structure and pass it to \ref
+ * vss_add_fec_client.
+ *
+ * Clients are automatically removed from that list by the vss if an error
+ * occurs, or if the sender requests deletion of a client by calling \ref
+ * vss_del_fec_client().
+ */
+
+/** FEC parameters requested by FEC clients. */
+struct fec_client_parms {
+ /** Number of data slices plus redundant slices. */
+ uint8_t slices_per_group;
+ /** Number of slices minus number of redundant slices. */
+ uint8_t data_slices_per_group;
+ /** Whether the header must be sent periodically. */
+ bool need_periodic_header;
+ /**
+ * Transport-layer initialisation for FEC support.
+ *
+ * This optional function serves (a) to make the transport layer
+ * ready to send FEC slices and (b) to determine the Maximum
+ * Packet Size (MPS) supported by the connection. The MPS value
+ * determines the largest payload size. This value is used to
+ * send FEC slices that are not larger than the path MTU, to avoid
+ * fragmentation and to maximize packet utilization. The user can
+ * alternatively specify a slice size of up to this value.
+ */
+ int (*init_fec)(struct sender_client *sc);
+ /** Push out FEC-encoded packets */
+ void (*send_fec)(struct sender_client *sc, char *buf, size_t len);
+};
+