// Per-socket options
size_t utcp_get_sndbuf(struct utcp_connection *connection);
-void utcp_set_sndbuf(struct utcp_connection *connection, size_t size);
+void utcp_set_sndbuf(struct utcp_connection *connection, void *buf, size_t size);
size_t utcp_get_sndbuf_free(struct utcp_connection *connection);
size_t utcp_get_rcvbuf(struct utcp_connection *connection);
-void utcp_set_rcvbuf(struct utcp_connection *connection, size_t size);
+void utcp_set_rcvbuf(struct utcp_connection *connection, void *buf, size_t size);
size_t utcp_get_rcvbuf_free(struct utcp_connection *connection);
size_t utcp_get_sendq(struct utcp_connection *connection);