+ /** @brief Maximum size of RTP payload to send
+ *
+ * This is the maximum number of bytes we pass to write(2); to determine
+ * actual packet sizes, add a UDP header and an IP header (and a link layer
+ * header if it's the link layer size you care about).
+ *
+ * Don't make this too big or arithmetic will start to overflow.
+ */
+ long rtp_max_payload;
+
+ /** @brief Whether to allow MTU discovery
+ *
+ * This is `yes' to force it on, `no' to force it off, or `default' to do
+ * whatever the system is configured to do. Note that this only has a
+ * useful effect in IPv4, since IPv6 doesn't permit hop-by-hop
+ * fragmentation.
+ */
+ char *rtp_mtu_discovery;
+