freetdm: OPENZAP-124 - Add round robin hunting direction (Patched by Ric)

libs/freetdm/src/include/freetdm.h

@@ -144,7 +144,9 @@ typedef enum {
 /*! \brief Hunting direction (when hunting for free channels) */
 typedef enum {
 	FTDM_TOP_DOWN,
-	FTDM_BOTTOM_UP
+	FTDM_BOTTOM_UP,
+	FTDM_RR_DOWN,
+	FTDM_RR_UP,
 } ftdm_direction_t;
 
 /*! \brief I/O channel type */

libs/freetdm/src/include/private/ftdm_core.h

@@ -493,6 +493,7 @@ struct ftdm_span {
 	ftdm_trunk_type_t trunk_type;
 	ftdm_analog_start_type_t start_type;
 	ftdm_signal_type_t signal_type;
+	uint32_t last_used_index;
 	/* Private signaling data. Do not touch unless you are a signaling module */
 	void *signal_data;
 	fio_signal_cb_t signal_cb;